LIQUID-CRYSTALLINE MEDIUM

Abstract

Liquid-crystalline (LC) media or LC materials and to energy saving liquid-crystal displays (LCDs) containing these media, especially gaming displays and AR/VR headsets addressed by an active matrix and in particular LC displays of the TN, PS-TN, STN, TN-TFT, OCB, IPS, PS-IPS, FFS, HB-FFS, XB-FFS, PS-FFS, SA-HB-FFS, SA-XB-FFS, polymer stabilised SA-HB-FFS, polymer stabilised SA-XB-FFS, positive VA or positive PS-VA type.

Claims

1. A liquid-crystalline medium, comprising one or more compounds of Formula I ##STR00698## in which the individual substituents, on each occurrence identically or differently, and each, independently of one another, have the following meaning: R.sup.0 an alkyl group having 1 to 12 C atoms or an alkenyl group having 2 to 12 C atoms in which one or more CH.sub.2 groups are optionally substituted by CC, CF.sub.2O, OCF.sub.2, CHCH, ##STR00699## O, COO or OCO in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be substituted by a halogen atom; X.sup.0 a halogen atom, CN, SCN, NCS or an alkyl or an alkoxy group having 1 to 6 C atoms or an alkenyl or an alkenyloxy group having 2 to 6 C atoms in which one or more H atoms has been substituted by a halogen atom; L.sup.1 and L.sup.2 each, independently of one another, H, F or C, wherein L.sup.1 and L.sup.2 do not simultaneously denote H; Y.sup.0 H or CH.sub.3; one or more antioxidant and, optionally, one or more light stabilizer.

2. The medium according to claim 1, wherein the one or more antioxidant is a compound of Formula ST: ##STR00700## in which the individual substituents have the following meanings: X.sup.21 and X.sup.22 each, independently of one another, denote O, CH.sub.2, CHR.sup.23 or NR.sup.23; R.sup.21 and R.sup.22 each, independently of one another, denote a H atom or an alkyl- or alkoxy group having 1 to 12 C atoms, an alkenyl, alkynyl, alkenyloxy or alkoxyalkyl group having 2 to 12 C atoms or a cycloalkyl group having 3 to 12 C atoms, in which one or more non-adjacent CH.sub.2 groups are optionally substituted by CC, CF.sub.2O, OCF.sub.2, CHCH, ##STR00701## O, COO or OCO in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be substituted by a halogen atom or a cycloalkyl or a cycloalkoxy group having 3 to 12 C atoms, in which one or more H atoms may be substituted by a halogen atom; R.sup.23 denotes a H atom, an alkyl or alkoxy group having 1 to 10 C atoms; r denotes 0 or 1.

3. The medium according to claim 1, wherein the one or more light stabilizers is a compound of Formula H: ##STR00702## in which R.sup.11 each, independently of one another, denote a H atom, F, an alkyl group having 1 to 20 C atoms, in which one or more CH.sub.2 groups are optionally substituted by CC, CF.sub.2O, OCF.sub.2, CHCH, ##STR00703## O, COO, OCO, NR.sup.13, CONR.sup.13 or NR.sup.13CO in such a way that O and N atoms are not linked directly to one another and in which one H atom or a plurality of H atoms may be substituted by F, OR.sup.13, N(R.sup.13)(R.sup.14) or R.sup.15; R.sup.12 each, independently of one another, denote a H atom, an alkyl group having 1 to 20 C atoms, in which one or more CH.sub.2 groups are optionally substituted by CC, CF.sub.2O, OCF.sub.2, CHCH, ##STR00704## O, COO, OCO, NR.sup.13, CONR.sup.13 or NR.sup.13CO in such a way that O atoms are not linked directly to one another, a hydrocarbon group which contains a cycloalkyl or alkylcycloalkyl group and in which one or more CH.sub.2 groups are optionally substituted by CC, CF.sub.2O, OCF.sub.2, CHCH, ##STR00705## O, COO, OCO, NR.sup.13, CONR.sup.13 or NR.sup.13CO in such a way that O atoms are not linked directly to one another, and in which one H atom or a plurality of H atoms may be substituted by F, OR.sup.13, N(R.sup.13)(R.sup.14) or R.sup.15, or an aromatic or heteroaromatic hydrocarbon group, in which one H atom or a plurality of H atoms may be substituted by OR.sup.13, N(R.sup.13)(R.sup.14) or R.sup.15; R.sup.13, R.sup.14 each, independently of one another, denote an alkyl or acyl group and R.sup.15 having 1 to 10 C atoms or an aromatic hydrocarbon or carboxylic acid group having 6 to 12 C atoms in which one or more CH.sub.2 groups are optionally substituted by CC, CF.sub.2O, OCF.sub.2, CHCH, ##STR00706## O, COO, OCO, NR.sup.13, CONR.sup.13 or NR.sup.13CO in such a way that O atoms are not linked directly to one another; R.sup.16 each, independently of one another, denote a H atom, an alkyl group or an alkoxy group having 1 to 10 C atoms in which one or more CH.sub.2 groups are optionally substituted by CC, CF.sub.2O, OCF.sub.2, CHCH, ##STR00707## O COO, OCO, NR.sup.13, CONR.sup.13 or NR.sup.13CO in such a way that O atoms are not linked directly to one another, O-cycloalkyl group having 3 to 12 C atoms, O.sup. or OH; R.sup.17 each, independently of one another, a H atom, an alkyl group or an alkoxy group having 1 to 10 C atoms, or an alkylene group or a single bond, wherein R.sup.17 together with S.sup.11 may form a ring structure; S.sup.11 and S.sup.12 each, independently of one another, denote an alkylene group having 1 to 20 C atoms, in which one or more CH.sub.2 groups are optionally substituted by CC, CF.sub.2O, OCF.sub.2, CHCH, ##STR00708## O, COO, OCO, NR.sup.13, CONR.sup.13 or NR.sup.13CO in such a way that O and N atoms are not linked directly to one another and in which one H atom or a plurality of H atoms may be substituted by F, OR.sup.13, N(R.sup.13)(R.sup.14) or R.sup.15, or a single bond; Y.sup.11 to Y.sup.14 each, independently of one another, denote methyl or ethyl; X.sup.11 C; Z.sup.11 to Z.sup.14 each, independently of one another, denote O, (C=O), O(C=O) (C=O)O, O(C=O)O, (NR.sup.13), NR.sup.13(C=O), (C=O)NR.sup.13 or a single bond and if S.sup.11 is a single bond, both Z.sup.11 and Z.sup.12 do not simultaneously denote O; if S.sup.12 is a single bond, both Z.sup.13 and Z.sup.14 do not simultaneously denote O; and, if q denotes O, both Z.sup.12 and Z.sup.13 do not simultaneously denote O; p 1 or 2; q 0 or 1; (3-p); n an integer from 1 to 10; m an integer from 0 to 8; wherein n*p an integer from 1 to 10, and ##STR00709## an organic moiety having (m+n) bonding sites.

4. The medium according to claim 1, wherein the one or more compounds of the Formula I is selected from one of the following: ##STR00710## in which R.sup.0 an alkyl group having 1 to 6 C atoms or an alkenyl group having 2 to 6 C atoms in which one or more CH.sub.2 groups are optionally substituted by CC, CF.sub.2O, OCF.sub.2, CHCH, ##STR00711## O, COO or OCO in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be substituted by a halogen atom; X.sup.0 a F atom or an alkyl or an alkoxy group having 1 to 3 C atoms or an alkenyl or an alkenyloxy group having 2 or 3 C atoms in which one or more H atoms are substituted by a F atom; and Y.sup.0 H or CH.sub.3.

5. The medium according to claim 3, wherein the one or more compounds of the Formula H is selected from one of the following: ##STR00712## ##STR00713## in which R.sup.11 each, independently of one another, a H atom, an alkyl group having 1 to 20 C atoms, in which one or more CH.sub.2 groups are optionally substituted by CC, CF.sub.2O, OCF.sub.2, CHCH, ##STR00714## O, COO or OCO in such a way that O atoms are not linked directly to one another and in which one H atom or a plurality of H atoms may be substituted by F, OR.sup.13, N(R.sup.13)(R.sup.14) or R.sup.15; R.sup.16 a H atom or O.sup.; S.sup.11 and S.sup.12 each, independently of one another, an alkylene group having 1 to 20 C atoms, in which one or more CH.sub.2 groups are optionally substituted by CC, CF.sub.2O, OCF.sub.2, CHCH, ##STR00715## O, COO or OCO in such a way that O atoms are not linked directly to one another and in which one H atom or a plurality of H atoms may be substituted by F, OR.sup.13, N(R.sup.13)(R.sup.14) or R.sup.15, or a single bond; and n an integer from 0 to 8.

6. The medium according to claim 1, wherein it comprises one or more compounds selected from the following formulae: ##STR00716## in which the individual substituents have the following meanings: alkyl and alkyl* each, independently from one another, an alkyl group having 1 to 6 C atoms; alkenyl and alkenyl* each, independently of one another, alkenyl group having 2 to 6 C atoms.

7. The medium according to claim 1, comprising one or more compounds selected from the group consisting of the following formulae: ##STR00717## in which R.sup.1 and R.sup.2 each, independently of one another, n-alkyl, alkoxy, oxaalkyl, fluoroalkyl or alkenyl, each having up to 6 C atoms, and L.sup.1 denotes, H, F or Cl.

8. The medium according to claim 1, comprising one or more compounds selected from the group consisting of the following formulae: ##STR00718## in which the individual substituents have the following meanings: ##STR00719## in which R.sup.0 denotes an alkyl group having 1 to 12 C atoms or an alkenyl group having 2 to 12 C atoms in which one or more CH.sub.2 groups are optionally substituted by CC, CF.sub.2O, OCF.sub.2, CHCH, ##STR00720## O, COO or OCO in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be substituted by a halogen atom, L.sup.1 to L.sup.6 denote each, independently of one another, H, F or Cl, wherein L and L.sup.2 do not simultaneously denote H, X.sup.0 denotes a halogen atom, CN, SCN, NCS or an alkyl or an alkoxy group having 1 to 6 C atoms or an alkenyl or an alkenyloxy group having 2 to 6 C atoms in which one or more H atoms has been substituted by a halogen atom, and Y.sup.0 denotes H or CH.sub.3.

9. The medium according to claim 8, wherein the one or more compounds of Formula II are selected from the following subformulae: ##STR00721## in which R.sup.0 denotes an alkyl group having 1 to 12 C atoms or an alkenyl group having 2 to 12 C atoms in which one or more CH.sub.2 groups are optionally substituted by CC, CF.sub.2O, OCF.sub.2, CHCH, ##STR00722## O, COO or OCO in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be substituted by a halogen atom, and X.sup.0 denotes a halogen atom, CN, SCN, NCS or an alkyl or an alkoxy group having 1 to 6 C atoms or an alkenyl or an alkenyloxy group having 2 to 6 C atoms in which one or more H atoms has been substituted by a halogen atom.

10. The medium according to claim 8, wherein the one or more compounds of Formula III are selected from the following subformulae: ##STR00723## ##STR00724## ##STR00725## in which R.sup.0 denotes an alkyl group having 1 to 12 C atoms or an alkenyl group having 2 to 12 C atoms in which one or more OH.sub.2 groups are optionally substituted by CC, CF.sub.2O, OCF.sub.2, CHCH, ##STR00726## O, COO or OCO in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be substituted by a halogen atom, and X.sup.0 denotes a halogen atom, CN, SCN, NCS or an alkyl or an alkoxy group having 1 to 6 C atoms or an alkenyl or an alkenyloxy group having 2 to 6 C atoms in which one or more H atoms has been substituted by a halogen atom.

11. The medium according to claim 1, wherein it additionally comprises one or more compounds selected from the group consisting of the following formulae: ##STR00727## in which R.sup.0 denotes an alkyl group having 1 to 12 C atoms or an alkenyl group having 2 to 12 C atoms in which one or more CH.sub.2 groups are optionally substituted by CC, CF.sub.2O, OCF.sub.2, CHCH, ##STR00728## O, COO or OCO in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be substituted by a halogen atom, X.sup.0 denotes a halogen atom, CN, SCN, NCS or an alkyl or an alkoxy group having 1 to 6 C atoms or an alkenyl or an alkenyloxy group having 2 to 6 C atoms in which one or more H atoms has been substituted by a halogen atom, L.sup.1, L.sup.2 denote each, independently of one another, H, F or C, wherein L.sup.1 and L.sup.2 do not simultaneously denote H, and Y.sup.0 H or CH.sub.3; L.sup.3 and L.sup.4 each, independently of one another, have the meanings given for L.sup.1; Z.sup.0 denotes C.sub.2H.sub.4, (CH.sub.2).sub.4, CHCH, CF=CF, C.sub.2F.sub.4, CH.sub.2CF.sub.2, CF.sub.2CH.sub.2, CH.sub.2O, OCH.sub.2, COO, CF.sub.2O, or OCF.sub.2, in the Formulae V and VI also a single bond; and s denotes 0 or 1.

12. The medium according to claim 1, wherein it comprises one or more compounds selected from the group consisting of the following formulae ##STR00729## in which R.sup.0 denotes an alkyl group having 1 to 12 C atoms or an alkenyl group having 2 to 12 C atoms in which one or more CH.sub.2 groups are optionally substituted by CC, CF.sub.2O, OCF.sub.2, CHCH, ##STR00730## O, OO or OCO in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be substituted by a halogen atom L.sup.1 to L.sup.4 denote each, independently of one another, H, F or Cl, wherein L and L.sup.2 do not simultaneously denote H X.sup.0 denotes a halogen atom, CN, SCN, NCS or an alkyl or an alkoxy group having 1 to 6 C atoms or an alkenyl or an alkenyloxy group having 2 to 6 C atoms in which one or more H atoms has been substituted by a halogen atom, and Y.sup.0 denotes H or CH.sub.3.

13. The medium according to claim 1, comprising one or more compounds selected from the group consisting of the following formulae: ##STR00731## in which ##STR00732## in which R.sup.1 denotes an alkyl group having 1 to 12 C atoms or an alkenyl group having 2 to 12 C atoms in which one or more CH.sub.2 groups are optionally substituted by CC, CF.sub.2O, OCF.sub.2, CHCH, ##STR00733## O, COO or OCO in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be substituted by a halogen atom, and X.sup.0 denotes a halogen atom, CN, SCN, NCS or an alkyl or an alkoxy group having 1 to 6 C atoms or an alkenyl or an alkenyloxy group having 2 to 6 C atoms in which one or more H atoms has been substituted by a halogen atom.

14. The medium according to claim 1, wherein it comprises one or more compounds of Formula I, one or more antioxidants and, optionally, one or more light stabilizer and one or more compounds selected from the group consisting of the Formulae Z.sup.1, Z.sup.2, Z.sup.3, Z.sup.4, Z.sup.5, II, III, IV, VI, XIV, XX, XII, XXIII, XXIX, XVI, XVIIa, XVIIb, XVIIc.

15. The medium according to claim 1, comprising one or more compounds of Formula I, one or more antioxidants and, optionally, one or more light stabilizer and one or more compounds selected from the group consisting of the Formulae LP1 and/or LP2.

16. The medium according to claim 1, comprising one or more compounds of Formula I, one or more antioxidants and, optionally, one or more light stabilizer and one or more compounds selected from the group consisting of the Formulae XXIX, XXX and XXVIIIa.

17. A process for the preparation of a liquid-crystalline medium according to claim 1, wherein one or more antioxidants and one or more light stabilizers are mixed with one or more mesogenic compounds and optionally one or more polymerizable compounds and/or one or more additives.

18. An electro-optical liquid-crystal display or an AR/VR headset containing a liquid-crystalline medium according to claim 1.

19. The electro-optical liquid-crystal display according to claim 18, wherein it comprises a TN, PS-TN, STN, TN-TFT, OCB, IPS, PS-IPS, FFS, HB-FFS, XB-FFS, PS-HB-FFS, PS-XB-FFS, SA-HB-FFS, SA-XB-FS, polymer stabilised SA-HB-FFS, polymer stabilised SA-XB-FFS, positive VA or positive PS-VA display.

Description

DETAILED DESCRIPTION OF THE INVENTION

Antioxidant

[0086] The term antioxidant as used in the present application is well known to a skilled person and refers to a compound added to a LC medium which is capable of retarding autooxidation. The antioxidants for use in the present invention are not particularly limited as long as they do not substantially deteriorate physical properties of the LC medium, in particular, in terms of their voltage holding ratio and mesogenic behaviour.

[0087] In one preferred embodiment, the antioxidant in the LC medium of the present invention is described by the general Formula ST as specified above. LC media comprising compounds of the following sub-formulae ST-1, ST-2 and ST-3 showed a particularly high long-term thermal and UV stability:

##STR00024##

in which [0088] R.sup.21 and R.sup.22 each, independently of one another, denote a H atom or an alkyl or alkoxy group having 1 to 7 C atoms.

[0089] In particularly preferred embodiments, the compounds of the general Formula ST can be selected from the following specific structures:

##STR00025## ##STR00026## ##STR00027##

[0090] In a further preferred embodiment, the LC medium according to the present invention may comprise at least one further sterically hindered phenol as an additional antioxidant, which is mentioned in Table B below.

[0091] The preferred content of the one or more compounds of Formula ST in the LC medium depends inter alia on the inherent chemical stability of the LC medium as well as on the nature of the compound of Formula ST. They are preferably used in proportion ranging from 10 ppm to 10000 ppm, more preferably from 20 ppm to 2000 ppm, based on the weight of the LC medium.

Compounds of Formula H

[0092] The term light stabilizer as used in the present application is well known to a skilled person and refers to a compound added to a LC medium which is capable of protecting it against degradation resulting from a long term exposure to UV radiation. Suitable light stabilizers include, inter alia, hindered amine light stabilizers (HALS) and ultraviolet (UV) absorbers as well as a combination thereof. The light stabilizers for use in the present invention are not particularly limited as long as they do not substantially deteriorate physical properties of the LC medium, in particular, in terms of voltage holding ratio and mesogenic behaviour.

[0093] In one preferred embodiment, the light stabilizer in the LC medium of the present invention is described by the general Formula H as described above. In some preferred embodiments of the present invention, in the compounds of the Formula H,

##STR00028## [0094] ethane-1,2-diyl, propane-1,3-diyl, butane-1,4-diyl, pentane-1,5-diyl, hexane-1,6-diyl, heptane-1,7-diyl, octane-1,8-diyl,

##STR00029## and/or [0095] wherein [0096] Z.sup.12S.sup.11Z.sup.11 on each occurrence, independently of one another, denotes O, S.sup.11O, OS.sup.11O, (C=O)OS.sup.11O, O(C=O)S.sup.11O, O(C=O)S.sup.11-(C=O)O, OS.sup.11(C=O)O, (C=O)OS.sup.11C, (C=O)OS.sup.11O(C=O) or (NR.sup.13)S.sup.11O, (NR.sup.13C(O)S.sup.11(C=O)O or a single bond, [0097] preferably O, S.sup.11O, OS.sup.11O, (C=O)OS.sup.11O, O(C=O)S.sup.11O or OS.sup.11(CO.sub.0)O, and/or [0098] S.sup.11 preferably denotes an alkylene group having 1 to 20 C atoms, and/or [0099] R.sup.11 if present, denotes alkyl, alkoxy or H, preferably H or alkyl, and/or [0100] R.sup.12 denotes H, methyl, ethyl, propyl, isopropyl or 3-heptyl, or cyclohexyl.

[0101] In a preferred embodiment of the present application, in the compounds of the Formula H,

##STR00030## [0102] denotes a group selected from the group of the formulae:

##STR00031##

[0103] In a further preferred embodiment of the present application, in the compounds of the Formula H,

##STR00032## [0104] denotes a group selected from the group of the formulae

##STR00033##

[0105] In yet a further preferred embodiment of the present invention, in the compounds of the Formula H in which p preferably denotes 1,

##STR00034## [0106] denotes

##STR00035## preferably OS.sup.11O, S.sup.11O or OS.sup.11, particularly preferably OS.sup.11O or S.sup.11O.

[0107] In a further preferred embodiment of the present invention, in the compounds of the Formula H, the group

##STR00036## [0108] denotes a group selected from the group of the formulae

##STR00037##

[0109] In a further preferred embodiment of the present invention, in which p is 2, which may be identical to or different from those described above, in the compounds of the Formula H,

##STR00038## [0110] denotes a group selected from the group of the formulae

##STR00039##

[0111] In yet a further preferred embodiment of the present invention, which may be identical to or different from those described above, in the compounds of the Formula H, the group

##STR00040## [0112] on each occurrence, independently of one another, denotes

##STR00041##

[0113] Compounds of the following general Formulae H-1-1, H-1-2 and H-1-3, showed to be particularly efficient UV stabilisers in LC mixtures, in particular, in terms of VHR stability:

##STR00042## [0114] wherein ZG, R.sup.16 and n are as defined above and n denotes an integer from 1 to 8. These compounds are highly suitable as stabilisers in LC mixtures and stabilise the VHR of the mixtures upon UV exposure.

[0115] In a particularly preferred embodiment, the one or more compounds of the Formula H may be selected from the group consisting of the compounds the following Formulae H-2-1 to H-2-6:

##STR00043## ##STR00044## [0116] in which [0117] R.sup.11 each, independently of one another, denotes an H atom, an alkyl group having 1 to 20 C atoms, in which one CH.sub.2 group or, if present, a plurality of CH.sub.2 groups may be replaced by O or [0118] C(O), but two adjacent CH.sub.2 groups cannot be replaced by O, and one or, if present, a plurality of CH.sub.2 groups may be replaced by CHCH or CC, and in which one H atom or a plurality of H atoms may be replaced by F, OR.sup.13, N(R.sup.13)(R.sup.14) or R.sup.15, [0119] R.sup.16 denotes a H atom or O*, [0120] n denotes an integer from 0 to 12, and [0121] S.sup.11 and S.sup.12 each, independently of one another, denote an alkylene group having 1 to 20 C atoms, in which one CH.sub.2 group or, if present, a plurality of CH.sub.2 groups may be replaced by O or C(O), but two adjacent CH.sub.2 groups cannot be replaced by O, and in which one H atom or a plurality of H atoms may be replaced by F, OR.sup.13, N(R.sup.13)(R.sup.14) or R.sup.15, or denote a single bond.

[0122] In a preferred embodiment of the present invention, the LC media according to the invention comprise in each case one or more compounds of the Formula H selected from the following group of the compounds of the formulae:

##STR00045## ##STR00046## ##STR00047## ##STR00048## ##STR00049##

##STR00050##

[0123] The preferred content of the one or more compounds of Formula H in the LC medium depends inter alia on the inherent chemical stability of the LC medium as well as on the nature of the compound of Formula H. Compounds of Formula H in which R.sup.16 denotes O, which are known as NO radical type HALS are preferably used in proportion ranging from 50 ppm to 1000 ppm, based on the weight of the LC medium. Compounds of Formula H in which R.sup.16 denotes an H atom, which are known as NH radical type HALS are advantageously used in proportion ranging from 50 ppm to 2000 ppm, based on the weight of the LC medium.

Further Components

[0124] In one preferred embodiment, the LC medium may additionally comprise one or more compounds selected from the following Formulae II and Ill:

##STR00051## [0125] wherein the individual substituents, independently of each other and on each occurrence identically or differently, have the following meanings:

##STR00052## ##STR00053## [0126] R.sup.0 one of the meanings given for R.sup.0 in Formula I, [0127] X.sup.0 independently of one another F, Cl, an alkyl group, an alkenyl group, an alkoxy group or an alkenyloxy group having up to 6 C atoms, in which one or more H atoms has been substituted by a halogen atom, [0128] L.sup.1-8 independently of one another H, F or Cl, and [0129] Y.sup.0 H or CH.sub.3.

[0130] Preferred compounds of the Formula II and Ill are those wherein Y.sup.0 is H.

[0131] Further preferred compounds of the Formula II and Ill are those wherein R.sup.0 denotes alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl, propyl, butyl or pentyl and X.sup.0 denotes F, CF.sub.3 or OCF.sub.3, furthermore OCF=CF.sub.2, OCHFCF.sub.3 or Cl, very preferably F.

[0132] In a preferred embodiment, the LC medium comprises one or more compounds of the Formula II selected from the following subformulae:

##STR00054## [0133] in which R.sup.0 and X.sup.0 have the meanings given in the Formula II.

[0134] Preferred compounds are those of the Formula II-1, -2 and 11-3, very preferred those of the Formula II-1 and 11-2.

[0135] In the compounds of the Formulae II-1 to 11-7 R.sup.0 preferably denotes R.sup.0 denotes alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl, propyl, butyl or pentyl and X.sup.0 denotes F, CF.sub.3 or OCF.sub.3, furthermore OCF=CF.sub.2, OCHFCF.sub.3 or Cl, very preferably F.

[0136] In one embodiment, the LC medium contains one or more compounds of the Formula II or their subformulae as described above and below, wherein Y.sup.0 is CH.sub.3. Very preferably, the LC medium according to this preferred embodiment comprises one or more compounds of the Formula II selected from the following subformulae:

##STR00055## [0137] in which R.sup.0 and X.sup.0 have the meanings given in the Formula II.

[0138] Preferred compounds are those of the Formula IIA-1, IIA-2 and IIA-3, very preferred are those of Formula IIA-1 and IIA-2.

[0139] In the compounds of the Formulae IIA-1 to IIA-7 R.sup.0 preferably denotes alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl, propyl, butyl or pentyl and X.sup.0 denotes F, CF.sub.3 or OCF.sub.3, furthermore OCF=CF.sub.2, OCHFCF.sub.3 or Cl, very preferably F.

[0140] The proportion of the compounds of the Formula II in the LC medium is typically from 0 to 20%, very preferably from 1 to 15%, most preferably from 2 to 10% by weight.

[0141] In a further preferred embodiment, the LC medium comprises one or more compounds of the Formula III selected from the following subformulae:

##STR00056## ##STR00057## ##STR00058## ##STR00059## [0142] in which R.sup.0 and X.sup.0 have the meanings given in the Formula II.

[0143] Particularly preferred compounds are those of the Formulae Ill-1, Ill-4, Ill-6, Ill-16, Ill-19 and Ill-20.

[0144] In the compounds of the Formulae Ill-1 to Ill-22 R.sup.0 denotes alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl, propyl, butyl or pentyl and X.sup.0 denotes F, CF.sub.3 or OCF.sub.3, furthermore OCF=CF.sub.2, OCHFCF.sub.3 or Cl, very preferably F, and Y.sup.0 preferably denotes H.

[0145] The LC medium may contain one or more compounds of the Formula III or their subformulae as described above and below wherein Y.sup.0 is CH.sub.3. Very preferably, the LC medium according to this preferred embodiment comprises one or more compounds of the Formula III selected from the following subformulae:

##STR00060## ##STR00061## ##STR00062## [0146] in which R.sup.0 and X.sup.0 have the meanings given in the Formula III.

[0147] Preferred compounds are those of the Formula IIIA-1, IIIA-4, IIIA-6, IIIA-16, IIIA-19 and IIIA-20.

[0148] In the compounds of the Formulae IIIA-1 to IIIA-21 R.sup.0 denotes alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl, propyl, butyl or pentyl and X.sup.0 denotes F, CF.sub.3 or OCF.sub.3, furthermore OCF=CF.sub.2, OCHFCF.sub.3 or Cl, very preferably F.

[0149] The proportion of the compounds of the Formula III in the LC medium is preferably from 5 to 60%, very preferably from 10 to 50%, most preferably from 20 to 40% by weight.

[0150] In a further preferred embodiment, the LC medium may additionally comprise one or more compounds selected from the following formulae:

##STR00063## [0151] in which [0152] R.sup.0, X.sup.0, L.sup.1-4 and Y.sup.0 have the meanings indicated in the Formulae II and III, [0153] Z.sup.0 denotes C.sub.2H.sub.4, (CH.sub.2).sub.4, CHCH, CF=CF, C.sub.2F.sub.4, CH.sub.2CF.sub.2, CF.sub.2CH.sub.2, CH.sub.2O, OCH.sub.2, COO, CF.sub.2O, or OCF.sub.2, in the Formulae V and VI also a single bond; and [0154] s denotes 0 or 1.

[0155] The compounds of the Formula IV are preferably selected from the following formulae:

##STR00064## [0156] in which R.sup.0 and X.sup.0 have the meanings indicated in the Formulae II and III.

[0157] R.sup.0 preferably denotes alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl, propyl, butyl or pentyl. X.sup.0 preferably denotes F or OCF.sub.3, furthermore OCF=CF.sub.2, OCHFCF.sub.3 or Cl.

[0158] The compounds of the Formula IVa are preferably represented by the following subformulae:

##STR00065##

[0159] The compounds of the Formula IVb are preferably represented by the following formulae:

##STR00066##

[0160] The compounds of the Formulae IVc are preferably represented by the following subformulae:

##STR00067## [0161] in which R.sup.0 has the meanings indicated in the Formula II and is preferably alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl, n-propyl, n-butyl or n-pentyl.

[0162] The compound(s) of the Formula IVc, in particular of the Formula IVc-1, is (are) preferably employed in the LC media according to the invention in amounts of 1-20% by weight, particularly preferably 2-15% by weight.

[0163] The compounds of the Formula V are preferably selected from the following subformulae:

##STR00068## [0164] in which R.sup.0 and X.sup.0 have the meanings indicated in the Formula II. [0165] R.sup.0 preferably denotes alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl, propyl, butyl or pentyl. X.sup.0 preferably denotes F and OCF.sub.3, furthermore OCHF.sub.2, CF.sub.3, OCF=CF.sub.2, OCHFCF.sub.3 and OCHCF.sub.2.

[0166] The compounds of the Formula VI are preferably selected from the following subformulae:

##STR00069## [0167] in which R.sup.0 and X.sup.0 have the meanings indicated in the Formula II.

[0168] R.sup.0 preferably denotes alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl, n-propyl, n-butyl or n-pentyl. X.sup.0 preferably denotes F, furthermore OCF.sub.3, CF.sub.3, CF=CF.sub.2, OCHF.sub.2, OCHFCF.sub.3 and OCHCF.sub.2;

[0169] Preferred compounds of the Formulae Via to Vie are those selected from the following subformulae:

##STR00070## [0170] alkyl being an alkyl group with 1 to 6 C atoms.

[0171] The compounds of the Formula VII are preferably selected from the following subformulae:

##STR00071## [0172] in which R.sup.0 and X.sup.0 have the meanings indicated in the Formula II.

[0173] R.sup.0 preferably denotes alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl, propyl, butyl or pentyl. X.sup.0 preferably denotes F, furthermore OCF.sub.3, OCHF.sub.2, OCHFCF.sub.3 and OCHCF.sub.2.

[0174] In some embodiments, the LC medium additionally comprises one or more compounds selected from the following formulae:

##STR00072## [0175] in which [0176] R.sup.0 and X.sup.0 each, independently of one another, have one of the meanings indicated in the Formula II, [0177] L.sup.1-4 each, independently of one another, denote H or F, [0178] Y.sup.0 denotes H or CH.sub.3, preferably H, [0179] X.sup.0 is preferably F, Cl, CF.sub.3, OCF.sub.3 or OCHF.sub.2, OCF=CF.sub.2, OCHFCF.sub.3, [0180] R.sup.0 preferably denotes alkyl, alkoxy, oxaalkyl, cycloalkyl, fluoroalkyl or alkenyl, each having up to 6 C atoms.

[0181] Very preferably, the LC medium according to the invention comprises one or more compounds of the Formula XXa:

##STR00073## [0182] in which R.sup.0 denotes alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl, propyl, butyl or pentyl and X.sup.0 denotes F, CF.sub.3 or OCF.sub.3, furthermore OCF=CF.sub.2, OCHFCF.sub.3 or Cl, very preferably F. R.sup.0 preferably denotes straight-chain alkyl, in particular ethyl, n-propyl, n-butyl or n-pentyl and very particularly preferably n-propyl.

[0183] The compound(s) of the Formula XX, in particular of the Formula XXa, is (are) preferably employed in the LC media according to the invention in amounts of 0-15% by weight, particularly preferably 1-10% by weight.

[0184] Very preferably, the LC medium according to the invention comprises one or more compounds of the Formula XXIa:

##STR00074## [0185] in which R.sup.0 denotes alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl, propyl, butyl or pentyl. R.sup.0 preferably denotes straight-chain alkyl, in particular ethyl, n-propyl, n-butyl or n-pentyl and very particularly preferably n-propyl.

[0186] The compound(s) of the Formula XXI, in particular of the Formula XXIa, is (are) preferably employed in the LC media according to the invention in amounts of 1-15% by weight, particularly preferably 2-10% by weight.

[0187] Further preferably, the LC medium according to the invention comprises one or more compounds of the Formula XXIIIa:

##STR00075## [0188] in which R.sup.0 denotes alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms. R.sup.0 preferably denotes straight-chain alkyl, in particular ethyl, n-propyl, n-butyl or n-pentyl and very particularly preferably n-propyl or cycloalkyl, in particular cyclopentyl.

[0189] Preferred specific compounds of Formula XXIIIa include, in particular

##STR00076##

[0190] The compound(s) of the Formula XXIII, in particular of the Formula XXIIIa, is (are) preferably employed in the LC media according to the invention in amounts of 0.5-5% by weight, particularly preferably 0.5-2% by weight.

[0191] The LC medium may additionally comprise one or more compounds of the Formula XXIV:

##STR00077## [0192] in which R.sup.0, X.sup.0 and L.sup.1-6 have the meanings indicated in the Formula III, s denotes 0 or 1, and

##STR00078##

[0193] In the Formula XXIV, X.sup.0 may also denote an alkyl group having 1 to 6 C atoms or an alkoxy group having 1 to 6 C atoms. The alkyl or alkoxy group is preferably straight-chain.

[0194] R.sup.0 preferably denotes alkyl having 1 to 6 C atoms. X.sup.0 preferably denotes F.

[0195] The compounds of the Formula XXIV are preferably selected from the following subformulae:

##STR00079## [0196] in which R.sup.0, X.sup.0 and L.sup.1 have the meanings indicated in the Formula III. R.sup.0 preferably denotes alkyl having 1 to 6 C atoms. X.sup.0 preferably denotes F, and L.sup.1 is preferably F;

##STR00080## is preferably

##STR00081## ##STR00082## [0197] R.sup.0 is straight-chain alkyl or alkenyl having 2 to 6 C atoms;

[0198] The LC medium may further comprise one or more compounds of the following formulae:

##STR00083## [0199] in which R.sup.1 and X.sup.0 have the meanings indicated in the Formula II for R.sup.0 and X.sup.0, respectively. R.sup.1 preferably denotes alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl, propyl, butyl or pentyl. X.sup.0 preferably denotes F, CF.sub.3 or OCF.sub.3, furthermore OCF=CF.sub.2, OCHFCF.sub.3 or Cl, very preferably F. In the Formula XXIV, X.sup.0 very particularly preferably denotes Cl.

[0200] The LC medium may further optionally comprise one or more compounds of the following formulae:

##STR00084## [0201] in which [0202] and R.sup.1, X.sup.0 and Y.sup.0 have the meanings indicated in the Formula II for R.sup.0, X.sup.0 and Y.sup.0, respectively. R.sup.1 preferably denotes alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl, propyl, butyl or pentyl. X.sup.0 preferably denotes F, CF.sub.3 or OCF.sub.3, furthermore OCF=CF.sub.2, OCHFCF.sub.3 or Cl, very preferably F, and Y.sup.0 preferably denotes H. In some embodiments, the LC medium according to the invention preferably comprises one or more compounds of the Formula XXIX in which X.sup.0 preferably denotes F.

[0203] The compounds of the Formula XXVIII are preferably selected from the subformulae XXVIIIa, wherein XXVIIIa-1 and XXVIIIa-2 are mostly preferred:

##STR00085## [0204] alkyl being an alkyl group with 1 to 6 C atoms.

[0205] The compound(s) of the Formulae XXVII-XXX is (are) preferably employed in the LC media according to the invention in amounts of 1-20% by weight, particularly preferably 1-15% by weight. Particularly preferred LC media comprise at least one compound of the Formula XXIX and/or the Formula XXX.

[0206] Very preferably, the LC medium according to the invention comprises one or more compounds of the Formulae XXIXa and/or XXXa:

##STR00086## [0207] in which R.sup.1 and Y.sup.0 have the meanings indicated for R.sup.0 and Y.sup.0 in the Formula II, and preferably R.sup.1 denotes alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl, propyl, butyl or pentyl.

[0208] The compound(s) of the Formulae XXIXa and/or XXXa is/are preferably employed in the LC media according to the invention in amounts of 1-15% by weight, particularly preferably 2-10% by weight.

[0209] The LC medium may further comprise one or more compounds of the following pyrimidine or pyridine compounds of the following formulae:

##STR00087## [0210] in which R.sup.1, X.sup.0 and Y.sup.0 have the meanings indicated in the Formula II for R.sup.0, X.sup.0 and Y.sup.0, respectively. R.sup.1 preferably denotes alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl, propyl, butyl or pentyl. X.sup.0 preferably denotes F, CF.sub.3 or OCF.sub.3, furthermore OCF=CF.sub.2, OCHFCF.sub.3 or Cl, very preferably F and Y.sup.0 preferably denotes H. The medium according to the invention particularly may optionally comprise one or more compounds of the Formula XXXI-1, in which X.sup.0 preferably denotes F. The compound(s) of the Formulae XXXI-1 to XXXI-3 may be employed in the LC media according to the invention in amounts of 1-20% by weight, particularly preferably 1-15% by weight.

[0211] Preferably, in addition to the compounds of the Formula I, an antioxidant and, optionally, a light stabilizer, the LC medium contains one or more compounds of the Formulae N1 and N2:

##STR00088## [0212] in which [0213] R.sup.41 and R.sup.42 independently of one another, have the meaning indicated above for R.sup.0 under Formula I, preferably R.sup.41 denotes alkyl and R.sup.42 denotes alkyl or alkoxy or R.sup.41 denotes alkenyl and R.sup.42 denotes alkyl, wherein one CH.sub.2 group may be replaced by cyclopropylene, 1,3-cyclobutylene, 1,3-cyclopentylene, 1,3-cyclopentenylene, preferably by cyclopropylene or 1,3-cyclopentylene,

##STR00089## independently of one another and, if

##STR00090## occurs twice, also these independently of one another, denote

##STR00091## preferably one or more of

##STR00092## denotes or denote,

##STR00093## [0214] Z.sup.41 and Z.sup.42, independently of one another and, if Z.sup.41 occurs twice, also these independently of one another, denote CH.sub.2CH.sub.2, COO, trans-CHCH, trans-CF=CF, CH.sub.2O, CF.sub.2O, CC or a single bond, preferably one or more thereof denotes/denote a single bond, and [0215] p denotes 0, 1 or 2, preferably 0 or 1, and [0216] R.sup.51 and R.sup.52, independently of one another, have one of the meanings given for R.sup.41 and R.sup.42 and preferably denote alkyl having 1 to 7 C atoms, preferably n-alkyl, particularly preferably n-alkyl having 1 to 5 C atoms, alkoxy having 1 to 7 C atoms, preferably n-alkoxy, particularly preferably n-alkoxy having 2 to 5 C atoms, alkoxyalkyl, alkenyl or alkenyloxy having 2 to 7 C atoms, preferably having 2 to 4 C atoms, preferably alkenyloxy, [0217] wherein one CH.sub.2 group may be replaced by cyclopropylene, 1,3-cyclobutylene, 1,3-cyclopentylene, 1,3-cyclopentenylene, preferably by cyclopropylene or 1,3-cyclopentylene,

##STR00094## if present, each, independently of one another, denote

##STR00095## [0218] preferably

##STR00096## [0219] preferably

##STR00097## [0220] and, if present,

##STR00098## preferably denotes,

##STR00099## [0221] Z.sup.51 to Z.sup.53 each, independently of one another, denote CH.sub.2CH.sub.2, CH.sub.2O, CHCH, CC, COO or a single bond, preferably CH.sub.2CH.sub.2, CH.sub.2O or a single bond and particularly preferably a single bond, [0222] i and j each, independently of one another, denote 0 or 1, [0223] (i+j) preferably denotes 0, 1 or 2, more preferably 0 or 1 and, most preferably, 1, and [0224] wherein the one or more, preferably one, of the aromatic rings present may optionally be substituted by an alkyl group, preferably by methyl.

[0225] In some embodiments, the LC medium contains one or more compounds selected from the following formulae:

##STR00100## [0226] wherein [0227] alkyl and alkyl* each, independently from one another, denote an alkyl group having 1 to 6 C atoms; [0228] alkenyl and alkenyl* each, independently of one another, denote an alkenyl group having 2 to 6 C atoms.

[0229] Very preferred are compounds of the Formula Z.sup.1 and Z.sup.2.

[0230] Preferred compounds of the Formulae Z.sup.1 to Z.sup.6 are those selected from the following subformulae:

##STR00101## ##STR00102##

[0231] In another preferred embodiment, the LC medium contains one or more compounds of the Formula Z1 or its preferred subformulae and/or one or more compounds selected from the Formulae Z2, Z3, Z4 and Z5 or their preferred subformulae.

[0232] Preferably, the total proportion of compounds of the Formula Z1, Z2, Z3, Z4, Z5 and Z6 or their subformulae, such as CC-3-V in the medium is from 10 to 65%, very preferably from 20 to 60%, most preferably from 25 to 55% by weight. In yet a more preferred embodiment, the compound of the Formula Z1-1 is used in concentrations ranging from 10 wt.-% to 60 wt.-%, more preferably 25 wt.-% to 50 wt.-%, based on the total weight of the LC medium. In a further preferred embodiment, the LC medium comprises 50 wt.-% to 70 wt.-% of compounds represented by the Formulae Z1-1 and Z4-2 in total.

[0233] Preferably, the medium contains 1, 2 or 3 compounds selected from the Formulae Z1, Z2, Z3 and Z4 or their subformulae.

[0234] The LC medium may additionally comprise one or more compounds of the following general formulae:

##STR00103## [0235] in which [0236] R.sup.1 and R.sup.2 each, independently from one another, denote C.sub.1-6-alkyl, C.sub.1-6-alkoxy or C.sub.2-6-alkenyl.

[0237] The compounds of the Formula XII are preferably selected from the following subformulae:

##STR00104##

wherein alkyl and alkyl* each, independently from one another, denote methyl, ethyl, propyl, butyl, pentyl or hexyl.

[0238] Particular preference is given to the compounds of the Formulae XIIa and XIIc. In the Formula XIIb, alkyl preferably, independently of one another, denotes n-C.sub.3H.sub.7, n-C.sub.4H.sub.9 or n-C.sub.5H.sub.11, in particular n-C.sub.3H.sub.7. In the Formula XIIc, alkyl preferably denotes n-C.sub.3H.sub.7 and alkyl is preferably CH.sub.3 or n-C.sub.3H.sub.7.

[0239] Particularly preferred compounds of the Formula XII are described by the following structures:

##STR00105##

[0240] The LC medium may additionally comprise one or more compounds selected from the following formulae:

##STR00106##

in which L.sup.1 and L.sup.2 have the meanings indicated in the Formula III, and R.sup.1 and R.sup.2 each, independently of one another, denote n-alkyl, cycloalkyl, alkoxy, oxaalkyl, fluoroalkyl or alkenyl, each having up to 6 C atoms, and preferably each, independently of one another, denote alkyl having 1 to 6 C atoms; in the compound of the Formula XIV, at least one of the substituents R.sup.1 and R.sup.2 preferably denotes alkenyl having 2 to 6 C atoms.

[0241] The LC medium may further optionally comprise one or more compounds of the Formula XIV in which at least one of the substituents R.sup.1 and R.sup.2 denotes alkenyl having 2 to 6 C atoms, preferably those selected from the following subformulae:

##STR00107##

in which alkyl and alkyl* have the meaning indicated above, and each, independently of one another, preferably denote methyl, ethyl or propyl.

[0242] The compounds of the Formulae XIV are preferably selected from the following subformulae:

##STR00108##

[0243] Very preferred are compounds of the Formulae XIVd-1, XIVe-1, XIVe-2 and XIVe-3.

[0244] The LC medium may further optionally comprise one or more compounds of the Formula XV in which at least one of the substituents R.sup.1 and R.sup.2 denotes alkyl or alkoxy having 2 to 6 C atoms, preferably those selected from the following subformulae:

##STR00109## [0245] in which alkyl and alkyl* has the meaning indicated above, and each, independently of one another, preferably denote methyl, ethyl or propyl.

[0246] In yet a further embodiment, the LC medium comprises one or more compounds of the Formula XVI:

##STR00110##

in which R.sup.1 and R.sup.2 have the meanings indicated for R.sup.0 in the Formula II, and preferably each, independently of one another, denote alkyl having 1 to 6 C atoms. L denotes H or F.

[0247] Particularly preferred compounds of the Formula XVI are those of the subformulae:

##STR00111## [0248] in which [0249] alkyl and alkyl each, independently of one another, denote a straight-chain alkyl group having 1 to 6 C atoms, in particular ethyl, propyl or pentyl, and [0250] alkenyl and alkenyl* each, independently of one another, denote a straight-chain alkenyl group having 2 to 6 C atoms, in particular CH.sub.2=CHC.sub.2H.sub.4, CH.sub.3CHCHC.sub.2H.sub.4, CH.sub.2=CH and CH.sub.3CHCH.

[0251] Particular preference is given to the compounds of the Formulae XVIb and XVIc. Very particular preference is given to the compounds of the following subformulae:

##STR00112##

[0252] In yet a further embodiment, the LC medium comprises one or more compounds of the Formula XIII:

##STR00113##

in which R.sup.1 and R.sup.2 have the meanings indicated for R.sup.0 in the Formula II, and preferably each, independently of one another, denote alkyl having 1 to 6 C atoms. L denotes H, F or Cl.

[0253] Particularly preferred compounds of the Formula XIII are those of the subformulae:

##STR00114## [0254] in which [0255] alkyl and alkyl* each, independently of one another, denote a straight-chain alkyl group having 1 to 6 C atoms, in particular ethyl, propyl or pentyl, and [0256] alkenyl and alkenyl* each, independently of one another, denote a straight-chain alkenyl group having 2 to 6 C atoms, in particular CH.sub.2=CHC.sub.2H.sub.4, CH.sub.3CHCHC.sub.2H.sub.4, CH.sub.2=CH and CH.sub.3CHCH.

[0257] Particular preference is given to the compounds of the Formulae XIIla and XIIlb. Very particular preference is given to the compounds of the following subformulae:

##STR00115##

[0258] In yet a further embodiment, the LC medium comprises one or more compounds of the Formula XIII:

##STR00116## [0259] in which R.sup.1 and R.sup.2 have the meanings indicated for R.sup.0 in the Formula II, and preferably each, independently of one another, denote alkyl having 1 to 6 C atoms. L denotes H, F or Cl.

[0260] Particularly preferred compounds of the Formula XIII are those of the subformulae:

##STR00117## [0261] in which [0262] alkyl and alkyl* each, independently of one another, denote a straight-chain alkyl group having 1 to 6 C atoms, in particular ethyl, propyl or pentyl, and [0263] alkenyl and alkenyl* each, independently of one another, denote a straight-chain alkenyl group having 2 to 6 C atoms, in particular CH.sub.2=CHC.sub.2H.sub.4, CH.sub.3CHCHC.sub.2H.sub.4, CH.sub.2=CH and CH.sub.3CHCH.

[0264] Particular preference is given to the compounds of the Formulae XIIla and XIIlb. Very particular preference is given to the compounds of the following subformulae:

##STR00118##

[0265] The LC medium may optionally comprise one or more compounds of the following formulae:

##STR00119## [0266] in which [0267] R.sup.1 and R.sup.2 have the meanings indicated in the Formula G, respectively, and preferably each, independently of one another, denote alkyl having 1 to 6 C atoms. L denotes H or F.

[0268] Very preferred are compounds of the Formula XVIIa, wherein L is H or F. Very preferred are compounds of the Formula XVIIb, wherein L is F.

[0269] The LC medium may additionally comprise one or more compounds of the following formula:

##STR00120## [0270] in which L, R.sup.1 and R.sup.2 have the meanings indicated in the Formula I for L.sup.1 and R.sup.0, respectively. R.sup.1 and R.sup.2 preferably denote alkyl, alkoxy, oxaalkyl, fluoroalkyl or alkenyl, each having up to 6 C atoms.

[0271] Particularly preferred compounds of the Formula XXXII are those of the subformulae:

##STR00121##

in which [0272] alkyl and alkyl each, independently of one another, denote a straight-chain alkyl group having 1 to 6 C atoms, in particular ethyl, propyl or pentyl, and [0273] alkenyl denotes a straight-chain alkenyl group having 2 to 6 C atoms, in particular CH.sub.2=CHC.sub.2H.sub.4, CH.sub.3CHCHC.sub.2H.sub.4, CH.sub.2=CH and CH.sub.3CHCH.

[0274] Very particular preference is given to the compounds of the following subformulae:

##STR00122##

[0275] In some further embodiments, the LC medium comprises one or more compounds of the following formulae:

##STR00123## [0276] in which R.sup.1 and R.sup.2 each, independently from one another, have the meanings indicated in the Formula I for R.sup.0 and preferably each, independently of one another, denote alkyl having 1 to 6 C atoms.

[0277] Very particular preference is given to the compounds of the following subformulae:

##STR00124##

[0278] Advantageously, the LC medium of the present invention may comprise one or more compounds of the Formula LP1

##STR00125## [0279] and/or one or more compounds of the Formula LP2

##STR00126## [0280] in which the individual substituents have the following meanings: [0281] R.sup.0 has one of the meanings given in for R.sup.1 in the Formula I; [0282] R.sup.2 denote an alkyl or an alkoxy group having 1 to 12 C atoms or an alkenyl or an alkenyloxy group having 2 or 12 C atoms in which one or more non-adjacent CH.sub.2 groups are optionally substituted by CC, [0283] CF.sub.2O, OCF.sub.2, CHCH,

##STR00127## O, COO or OCO in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be substituted by a cycloalkyl or a cycloalkoxy group having 3 to 12 C atoms; [0284] X.sup.0 has one of the meanings given in for X.sup.0 in the Formula I; [0285] Y.sup.0 denote H or CH.sub.3; and [0286] m and n denote 0 or 1.

[0287] The one or more compounds of the Formulae LP1 and LP2 may be preferably described by the following Formulae:

##STR00128## [0288] in which [0289] R.sup.0 is an alkyl or an alkoxy group having 1 to 6 C atoms or an alkenyl group having 2 to 6 C atoms in which one or more CH.sub.2 groups are optionally substituted by CC, CF.sub.2O, OCF.sub.2, CHCH,

##STR00129## O [0290] COO or OCO in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be substituted by a halogen atom; [0291] R.sup.2 is an alkyl group having 1 to 6 C atoms, in which one or more CH.sub.2 groups are optionally substituted by CC, CF.sub.2O, OCF.sub.2, CHCH,

##STR00130## O COO or OCO in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be substituted by a halogen atom; [0292] X.sup.0 a F atom or an alkyl or an alkoxy group having 1 to 3 C atoms or an alkenyl or an alkenyloxy group having 2 or 3 C atoms in which one or more H atoms are replaced by a F atom; and [0293] Y.sup.0 H or CH.sub.3.

[0294] The compounds of the general Formulae LP1 and LP2 can also be represented by one of the following structures:

##STR00131## ##STR00132## [0295] in which [0296] R.sup.0 is an alkyl or an alkoxy group having 1 to 12 C atoms in which one or more CH.sub.2 groups are optionally substituted by CC, CF.sub.2O, OCF.sub.2,

##STR00133## O [0297] COO or OCO in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be substituted by a halogen atom, preferably an alkyl group having 1 to 4 C atoms, alkenyl or an alkenyloxy group having 2 to 6 C atoms or a cycloalkyl or a cycloalkyloxy group having 3 to 6 C atoms, wherein vinyl, allyl or cyclopentyl are particularly preferable; [0298] n denotes 1, 2, 3, 4 or 5; and [0299] m denotes 1, 2, 3 or 4.

[0300] Particularly preferred compounds of the Formula LP1 are those selected from the group consisting of the following subformulae:

##STR00134## ##STR00135## [0301] wherein Y.sup.0 is H or CH.sub.3, preferably H.

[0302] Particularly preferred compounds of the Formula LP2 are those selected from the group consisting of the following subformulae:

##STR00136## [0303] wherein Y.sup.0 is H or CH.sub.3, preferably H.

[0304] Very preferred are compounds of the Formulae LP2-1a, LP2-1b, LP2-1c, LP2-1d, and LP2-1 i, LP2-2b, LP2-3a, LP2-3c mostly preferred is the compound Formula LP2-1 b.

[0305] Preferably, the LC medium comprises one or more compounds of the Formula LP1 and one or more compounds of the Formula LP2.

[0306] The total proportion of the compounds of the Formula LP1 or its subformulae in the LC medium is preferably from 2 to 35%, very preferably from 3 to 25%, mostly preferred from 4 to 15% by weight. The total proportion of the compounds of the Formula LP2 or its subformulae in the LC medium is preferably from 2 to 35%, very preferably from 3 to 25%, mostly preferred from 4 to 15% by weight.

[0307] Preferably, the LC medium contains 1, 2 or 3 compounds of the Formula LP1 or their subformulae. In a particularly preferred embodiment, the LC medium comprises at least one compound of the Formula LP1.

[0308] In addition to the compounds of the Formula I, an antioxidant and, optionally, a light stabilizer, the LC medium may optionally contain one or more compounds selected from the Formulae Y and B:

##STR00137## [0309] in which the individual substituents, on each occurrence identically or differently, and each, independently of one another, have the following meanings:

##STR00138## [0310] wherein [0311] R.sup.1, R.sup.2 each, independently from one another, have one of the meanings given for R.sup.0 in the Formula I, [0312] R.sup.3 one of the meanings given for R.sup.1, [0313] Z.sup.x, Z.sup.y CH.sub.2CH.sub.2, CHCH, CF.sub.2O, OCF.sub.2, CH.sub.2O, OCH.sub.2, COO, [0314] OCO, C.sub.2F.sub.4, CF=CF, CHCHCH.sub.2O, or a single bond, preferably a single bond, [0315] Z.sup.z CH.sub.2O, O, C.sub.2H.sub.4, OCH.sub.2, or a single bond, [0316] Y.sup.1 CH.sub.2, O or S, [0317] L.sup.1-4 H, F or Cl, preferably H or F, very preferably F, [0318] x, y 0, 1 or 2, with x+y<3, [0319] z 0 or 1, [0320] wherein in the Formula B the dibenzofuran or dibenzothiophene group may also be further substituted by a methyl or methoxy group, and [0321] wherein the compounds of the Formula Y contain at least one substituent L.sup.1-4 that is F or Cl, preferably F.

[0322] The LC medium according to this first preferred embodiment may contain one or more compounds of the Formula I, one or more antioxidants, one or more light stabilizers, one or more compounds selected from the Formulae Z1, Z2 and Z3, and one or more compounds selected from the Formulae Y and B.

[0323] The LC media according to this first preferred embodiment are especially suitable for use in LC displays of the HB-FFS or PS-HB-FFS mode.

[0324] In the compounds of the Formula Y and its subformulae, R.sup.1 and R.sup.2 preferably denote straight-chain alkyl or alkoxy having 1 to 6 C atoms, furthermore alkenyl having 2 to 6 C atoms, in particular vinyl, 1E-propenyl, 1E-butenyl, 3-butenyl, 1E-pentenyl, 3E-pentenyl or 4-pentenyl.

[0325] In the compounds of the Formula Y and its subformulae, preferably both substituents L.sup.1 and L.sup.2 denote F. In another preferred embodiment of the present invention, in the compounds of the Formula Y and its subformulae one of the substituents L.sup.1 and L.sup.2 denotes F and the other denotes Cl.

[0326] In a preferred embodiment of the present invention, the LC medium contains one or more compounds of the Formula Y selected from the following subformulae:

##STR00139## [0327] wherein R.sup.1, R.sup.2, Z.sup.x and Z.sup.y have the meanings given in the Formula Y, [0328] a denotes 1 or 2, [0329] b denotes 0 or 1, [0330] L.sup.1, L.sup.2 denote F or Cl, preferably F, and [0331] L.sup.5 denotes a H atom or CH.sub.3,

##STR00140##

[0332] Preferably, in the compounds of the Formula Y.sup.1 and Y.sup.2 both L.sup.1 and L.sup.2 denote F or one of L.sup.1 and L.sup.2 denotes F and the other denotes C.sub.1, or both L.sup.1 and L.sup.2 denote F or one of L.sup.1 and L.sup.2 denotes F and the other denotes Cl.

[0333] Preferably, the LC medium comprises one or more compounds of the Formula Y.sup.1 selected from the group consisting of the following subformulae:

##STR00141## ##STR00142## ##STR00143## ##STR00144## ##STR00145## ##STR00146## ##STR00147## ##STR00148## ##STR00149## ##STR00150## ##STR00151## ##STR00152## [0334] in which [0335] a denotes 1 or 2, [0336] alkyl and alkyl each, independently of one another, denote a straight-chain alkyl group having 1 to 6 C atoms, [0337] alkenyl denotes a straight-chain alkenyl group having 2 to 6 C atoms, and [0338] L.sup.5 denotes a H atom or CH.sub.3. [0339] alkenyl preferably denotes CH.sub.2=CH, CH.sub.2=CHCH.sub.2CH.sub.2, CH.sub.3CHCH, CH.sub.3CH.sub.2CHCH, CH.sub.3(CH.sub.2).sub.2CHCH, CH.sub.3(CH.sub.2).sub.3CHCH or CH.sub.3CHCH(CH.sub.2).sub.2.

[0340] Very preferably, the LC medium contains one or more compounds of the Formula Y1 selected from the Formulae Y1-1, Y1-2, Y1-7, Y1-12, Y1-17, Y1-22, Y1-40, Y1-41, Y1-42, Y1-44, Y1-50 and Y1-68. L.sup.5 preferably denotes a H atom.

[0341] Further preferably, the LC medium comprises one or more compounds of the Formula Y.sup.2 selected from the group consisting of the following subformulae:

##STR00153## ##STR00154## ##STR00155## ##STR00156## ##STR00157## [0342] which [0343] alkyl and alkyl each, independently of one another, denote a straight-chain alkyl group having 1 to 6 C atoms, and [0344] alkenyl denotes a straight-chain alkenyl group having 2 to 6 C atoms, (O) denotes an oxygen atom or a single bond, and [0345] L.sup.5 denotes a H atom or CH.sub.3, preferably a H atom. [0346] alkenyl preferably denotes CH.sub.2=CH, CH.sub.2=CHCH.sub.2CH.sub.2, CH.sub.3CHCH, CH.sub.3CH.sub.2CHCH, CH.sub.3(CH.sub.2).sub.2CHCH, CH.sub.3(CH.sub.2).sub.3CHCH or CH.sub.3CHCH(CH.sub.2).sub.2.

[0347] Very preferably, the LC medium contains one or more compounds of the Formula Y2 selected from Formulae Y2-2 and Y2-10.

[0348] The proportion of the compounds of the Formula Y1 or its subformulae in the LC medium is preferably from 0 to 10% by weight.

[0349] The proportion of the compounds of the Formula Y2 or its subformulae in the LC medium is preferably from 0 to 10% by weight.

[0350] The total proportion of the compounds of the Formula Y1 and Y2 or their subformulae in the medium is preferably from 1 to 20%, very preferably from 2 to 15% by weight.

[0351] Preferably, the LC medium contains 1, 2 or 3 compounds of the Formula Y1 and Y2 or their subformulae, very preferably selected from the Formulae Y1-2, Y1-22, Y1-66, Y1-70, Y2-6 and Y2-22.

[0352] In another preferred embodiment of the present invention, the LC medium contains one or more compounds of the Formula Y of the following subformula:

##STR00158## [0353] wherein L.sup.1, L.sup.2, L.sup.5, R.sup.1 and R.sup.2 have one of the meanings given in the Formula I for L.sup.1, L.sup.2, Y.sup.0 and R.sup.0, respectively.

[0354] Preferred compounds of the Formula Y3 are selected from the group consisting of the following subformulae:

##STR00159## ##STR00160## [0355] in which, [0356] alkyl and alkyl* each, independently of one another, denote a straight-chain alkyl group having 1 to 6 C atoms; [0357] alkenyl and alkenyl* each, independently of one another, denote a straight-chain alkenyl group having 2 to 6 C atoms; and [0358] (O) denotes an oxygen atom or a single bond. [0359] alkenyl and alkenyl* preferably denote CH.sub.2=CH, CH.sub.2=CHCH.sub.2CH.sub.2, CH.sub.3CHCH, CH.sub.3CH.sub.2CHCH, CH.sub.3(CH.sub.2).sub.2CHCH, CH.sub.3(CH.sub.2).sub.3CHCH or CH.sub.3CHCH(CH.sub.2).sub.2.

[0360] Particularly preferred compounds of the Formula Y3 are selected from the group consisting of following subformulae:

##STR00161## [0361] wherein alkoxy and alkoxy* each, independently of one another, preferably denote straight-chain alkoxy with 3, 4, or 5 C atoms.

[0362] Preferably, in the compounds of the Formula Y3 and its subformulae both L.sup.1 and L.sup.2 denote F. Further preferably in the compounds of the Formula Y3 one of the substituents L.sup.1 and L.sup.2 denotes F and the other denotes Cl.

[0363] The proportion of the compounds of the Formula Y3 or its subformulae in the LC medium is preferably from 0 to 10%, very preferably from 1 to 6% by weight.

[0364] Preferably, the LC medium contains 1, 2 or 3 compounds of the Formula Y3 or its subformulae, more preferably of the Formula Y3-6, very preferably of the Formula Y3-6A.

[0365] In yet another preferred embodiment of the present invention, the LC medium contains one or more compounds of the Formula Y of the subformula Y4:

##STR00162## [0366] in which R.sup.1 and R.sup.2 each, independently of one another, have one of the meanings indicated above in the Formula Y, and

##STR00163## [0367] each, independently of one another, denote

##STR00164## [0368] in which L.sup.5 denotes F or Cl, preferably F, and L.sup.6 denotes F, Cl, OCF.sub.3, CF.sub.3, CH.sub.3, CH.sub.2F or CHF.sub.2, preferably F, and preferably at least one of the rings G, I and K is different from unsubstituted benzene.

[0369] Mostly preferred compounds of the Formula Y4 are selected from the group consisting of the following subformulae:

##STR00165## ##STR00166## ##STR00167## [0370] in which [0371] R denotes a straight-chain alkyl or alkoxy group having 1-7 C atoms, [0372] (O) denotes an oxygen atom or a single bond, and [0373] m denotes an integer from 1 to 6.

[0374] R preferably denotes methyl, ethyl, propyl, butyl, pentyl, hexyl, methoxy, ethoxy, propoxy, butoxy or pentoxy.

[0375] The proportion of the compounds of the Formula Y4 or its subformulae in the medium is preferably from 0 to 10%, very preferably from 1 to 6% by weight.

[0376] Particularly preferred compounds are those of the subformulae

##STR00168##

in which [0377] alkyl and alkyl each, independently of one another, denote a straight-chain alkyl group having 1 to 6 C atoms, in particular ethyl, propyl or pentyl.

[0378] Use of the following compounds is particularly advantageous:

##STR00169##

[0379] In another preferred embodiment of the present invention, the LC medium contains one or more compounds of the Formula Y selected from the group consisting of the following subformulae:

##STR00170## [0380] in which R.sup.5 has one of the meanings indicated above in the Formula Y for R.sup.1, alkyl denotes a straight-chain alkyl group having 1 to 6 C atoms, d denotes 0 or 1, and z and m each, independently of one another, denote an integer from 1 to 6.

[0381] R.sup.5 in these compounds is particularly preferably C.sub.2-6-alkyl or -alkoxy or C.sub.2-6-alkenyl, d is preferably 1. The LC medium according to the invention preferably comprises one or more compounds of the above-mentioned formulae in amounts of >5% by weight.

[0382] Further preferred embodiments are indicated below: [0383] The LC medium comprises one or more compounds of the Formula Y of the following subformula

##STR00171## [0384] wherein R.sup.1, R.sup.2, L.sup.1, L.sup.2, X, x and Z.sup.x have the meanings given in the Formula Y, and wherein at least one of the rings X is cyclohexenylene.

[0385] Preferably, both substituents L.sup.1 and L.sup.2 denote F. Further preferably, one of the substituents L.sup.1 and L.sup.2 denotes F and the other denotes Cl.

[0386] The compounds of the Formula LY are preferably selected from the group consisting of the following subformulae:

##STR00172## [0387] in which [0388] R.sup.1 has the meaning indicated in the Formula Y above, [0389] (O) denotes an oxygen atom or a single bond, and [0390] v denotes an integer from 1 to 6.

[0391] R.sup.1 preferably denotes straight-chain alkyl having 1 to 6 C atoms or straight-chain alkenyl having 2 to 6 C atoms, in particular CH.sub.3, C.sub.2H.sub.5, n-C.sub.3H.sub.7, n-C.sub.4H.sub.9, n-C.sub.5H.sub.11, CH.sub.2=CH, CH.sub.2=CHCH.sub.2CH.sub.2, CH.sub.3CHCH, CH.sub.3CH.sub.2CHCH, CH.sub.3(CH.sub.2).sub.2CHCH, CH.sub.3(CH.sub.2).sub.3CHCH or CH.sub.3CHCH(CH.sub.2).sub.2.

[0392] Very preferred are compounds of the Formula LY4.

[0393] Preferably, the medium contains 1, 2 or 3 compounds of the Formula LY, very preferably of the Formula LY4.

[0394] The proportion of the compounds of the Formula LY or its subformulae in the medium is preferably from 1 to 10% by weight. [0395] The medium comprises one or more compounds of the Formula Y represented by the following subformula:

##STR00173## [0396] wherein R.sup.1, R.sup.2, L.sup.1, L.sup.2, Y, y and Z.sup.y have the meanings given in the Formula Y, and wherein at least one of the rings Y is tetrahydropyrane.

[0397] The compounds of the Formula AY are preferably selected from the group consisting of the following subformulae:

##STR00174## ##STR00175## [0398] in which [0399] R.sup.1 has the meaning indicated above, [0400] alkyl denotes a straight-chain alkyl group having 1 to 6 C atoms, [0401] (O) denotes an oxygen atom or a single bond, and [0402] v denotes an integer from 1 to 6.

[0403] R.sup.1 preferably denotes straight-chain alkyl having 1 to 6 C atoms or straight-chain alkenyl having 2 to 6 C atoms, in particular CH.sub.3, C.sub.2H.sub.5, n-C.sub.3H.sub.7, n-C.sub.4H.sub.9, n-C.sub.5H.sub.11, CH.sub.2=CH, CH.sub.2=CHCH.sub.2CH.sub.2, CH.sub.3CHCH, CH.sub.3CH.sub.2CHCH, CH.sub.3(CH.sub.2).sub.2CHCH, CH.sub.3(CH.sub.2).sub.3CHCH or CH.sub.3CHCH(CH.sub.2).sub.2.

[0404] In the compounds of the Formula B and its subformulae, R.sup.1 and R.sup.3 preferably denote straight-chain alkyl or alkoxy having 1 to 6 C atoms, in particular methoxy, ethoxy, propoxy or butoxy, furthermore alkenyl having 2 to 6 C atoms, in particular vinyl, 1E-propenyl, 1E-butenyl, 3-butenyl, 1E-pentenyl, 3E-pentenyl or 4-pentenyl.

[0405] In a preferred embodiment of the present invention, the medium contains one or more compounds of the Formula B selected from the following subformulae:

##STR00176## [0406] wherein Y1, L.sup.1, L.sup.2, R.sup.1 and R.sup.3 have the meanings given in the Formula B.

[0407] Preferred compounds of the Formula B1 are selected from the following subformulae:

##STR00177## [0408] wherein R.sup.1 and R.sup.3 independently denote a straight-chain alkyl group having 1 to 6 C atoms, in which one or more CH.sub.2 groups are optionally substituted by CC, CF.sub.2O, OCF.sub.2, CHCH,

##STR00178## O, COO or OCO in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be replaced by a halogen atom.

[0409] Very preferred are compounds of the Formula B1-1 and B1-2 wherein both groups (O) denote an oxygen atom and R.sup.1 and R.sup.3 independently denote an alkyl group being methyl, ethyl, propyl, butyl, pentyl or hexyl, which are preferably straight-chained. Very preferably one alkyl is ethyl and the other alkyl is n-pentyl.

[0410] Particularly preferred are compounds of the Formula B1-2.

[0411] Preferably, the compounds of the Formula B1-1 are selected from the group of compounds of the Formulae B1-1-1 to B1-1-11, preferably of the Formula B1-1-6:

##STR00179## [0412] in which [0413] alkyl and alkyl each, independently of one another, denote a straight-chain alkyl group having 1 to 6 C atoms, [0414] alkenyl and alkenyl* each, independently of one another, denote a straight-chain alkenyl group having 2 to 6 C atoms, [0415] alkoxy and alkoxy* each, independently of one another, denote a straight-chain alkoxy group having 1 to 6 C atoms.

[0416] Preferably, the compounds of the Formula B1-2 are selected from the group of compounds of Formulae B1-2-1 to B1-2-10, preferably of Formula B1-2-6:

##STR00180## [0417] in which [0418] alkyl and alkyl each, independently of one another, denote a straight-chain alkyl group having 1 to 6 C atoms, [0419] alkenyl and alkenyl* each, independently of one another, denote a straight-chain alkenyl group having 2 to 6 C atoms, [0420] alkoxy and alkoxy* each, independently of one another, denote a straight-chain alkoxy group having 1 to 6 C atoms.

[0421] Optionally, the LC medium comprises one or more compounds of the Formula B1-1A and/or B1-2A:

##STR00181## [0422] in which [0423] (O) denotes O or a single bond, [0424] R.sup.IIIA denotes alkyl or alkenyl having up to 7 C atoms or a group Cy-C.sub.mH.sub.2m+1, [0425] m and n are, identically or differently, 0, 1, 2, 3, 4, 5 or 6, preferably 1, 2 or 3, very preferably 1, [0426] Cy denotes a cycloaliphatic group having 3, 4 or 5 ring atoms, which is optionally substituted with alkyl or alkenyl each having up to 3 C atoms, or with halogen or CN, and preferably denotes cyclopropyl, cyclobutyl or cyclopentyl.

[0427] The compounds of the Formulae B1-1A and/or B1-2A are contained in the medium either alternatively or in addition to the compounds of the Formulae B1-1 and B1-2, preferably additionally.

[0428] Preferred compounds of the Formulae B1-1A and/or B1-2A are also the following:

##STR00182## [0429] in which alkoxy denotes a straight-chain alkoxy group having 1 to 6 C atoms or alternatively (CH.sub.2).sub.nF in which n is 2, 3, 4, or 5, preferably C.sub.2H.sub.4F.

[0430] The proportion of the compounds of the Formula B1 or its subformulae in the LC medium is preferably from 1 to 20%, very preferably from 1 to 15% by weight.

[0431] Preferably, the LC medium contains 1, 2 or 3 compounds of the Formula B1 or its subformulae.

[0432] In a preferred embodiment of the present invention, the LC medium may comprise one or more compounds of the Formula B2-2

##STR00183## [0433] in which [0434] R.sup.1, R.sup.3 identically or differently, denote H, an alkyl or alkoxy group having 1 to 6 C atoms, in which one or more CH.sub.2 groups in these groups are optionally replaced, independently of one another, by CC, CF.sub.2O, OCF.sub.2, CHCH,

##STR00184## O, COO or OCO in such a way that atoms are not linked directly to one another, and in which, in addition, one or more H atoms may be replaced by halogen.

[0435] The compounds of the Formula B2-2 are preferably selected from the group of compounds of the Formulae B2-2-1 to B2-2-10:

##STR00185## [0436] in which R.sup.3 denotes alkyl having 1 to 6 C-atoms, preferably ethyl, n-propyl or n-butyl, or alternatively cyclopropylmethyl, cyclobutylmethyl or cyclopentylmethyl or alternatively (CH.sub.2).sub.nF in which n is 2, 3, 4, or 5, preferably C.sub.2H.sub.4F.

[0437] Particularly preferred compounds of the Formula B2 are selected from the following subformulae:

##STR00186##

[0438] The proportion of the compounds of the Formula B2 or its subformulae in the LC medium is preferably from 1 to 20%, very preferably from 1 to 15% by weight.

[0439] Preferably, the LC medium contains 1, 2 or 3 compounds of the Formula B2 or its subformulae.

[0440] Preferred compounds of the Formula B3 are selected from the following subformulae:

##STR00187## [0441] wherein R.sup.1 has one of the meanings given in the Formula B3 and preferably denotes straight-chain alkyl having 1 to 6 C atoms, very preferably methyl, ethyl, propyl, butyl, pentyl or hexyl, more preferably ethyl or propyl, most preferably propyl, and X.sup.1 has one of the meanings given in the Formula B3 and preferably denotes CF.sub.3 or OCF.sub.3.

[0442] Preferred compounds of the Formula B3 are selected from the following subformulae:

##STR00188## [0443] wherein R.sup.1 has one of the meanings given in the Formula B3 and preferably denotes straight-chain alkyl having 1 to 6 C atoms, very preferably methyl, ethyl, propyl, butyl, pentyl or hexyl, more preferably ethyl or propyl, most preferably propyl.

[0444] Most preferred are compounds of the Formulae B3-1-1 and B3-2-2.

[0445] In a preferred embodiment, the LC medium contains one or more compounds of the Formula B or its subformulae B1, B2, B3, B1-1, B1-2, B2-1, B2-2, B2-3, B3-1, B3-2, B3-1-1, B3-1-2, B3-2-1 and B3-2-2 wherein the dibenzofuran or dibenzothiophene group is substituted by a methyl or methoxy group, preferably by a methyl group, preferably in p-position to the substituent F, very preferably in p-position to the substituent F (i.e. in m-position to the terminal group R.sup.2 or X.sup.1).

[0446] The proportion of the compounds of the Formula B3 or its subformulae in the LC medium is preferably from 1 to 20%, very preferably from 1 to 10% by weight.

[0447] Preferably, the LC medium contains 1, 2 or 3 compounds of the Formula B3 or its subformulae.

[0448] Preferably, the total proportion of compounds of the Formula Y and B or their subformulae in the LC medium is from 2 to 25%, very preferably from 3 to 20% by weight.

[0449] Further preferred LC media are selected from the following preferred embodiments, including any combination thereof: [0450] a compound of the Formula I in combination with a compound of the Formula ST, H and Z1 to Z7 [0451] a compound of the Formula I in combination with a compound of the Formula ST, Z1 to Z7 and II and/or III [0452] a compound of the Formula I in combination with a compound of the Formula ST, LP1, IV to VIII and a compound of the Formula Z1 and Z4 [0453] a compound of the Formula I in combination with a compound of the Formula LP1 and/or LP2 [0454] a compound of the Formula I in combination with a compound of the Formula XXX and/or XXIX [0455] a compound of the Formula I in combination with a compound of the Formula IVb-1 [0456] a compound of the Formula I in combination with a compound of the Formula IVc-1 [0457] a compound of the Formula I in combination with a compound of the Formula XXXV [0458] a compound of the Formula I in combination with a compound of the Formula XIVc-1 [0459] a compound of the Formula I in combination with a compound of the Formula XIIa-1 [0460] a compound of the Formula I in combination with a compound of the Formula XVIc [0461] a compound of the Formula I in combination with a compound of the Formula VIb [0462] a compound of the Formula I in combination with a compound of the Formula XXVIIIa [0463] The LC medium comprises one or more compounds of the Formula I or its subformulae, ST and, optionally, H, II and/or III and one or more compounds selected from the group consisting of the Formulae Z1, Z2, Z3, Z4, Z5, V, VI, VII, VIII, XIV, XV, XVI, XVIIa, XVIIb, XVIIc, XVIII, XIX, XX, XXI, XXIII, XXIV, XXV, XXVI, XXVII, XXVIII, XXIX, XXX, XXX-1, XXX-2, XXX-3, XXXII, XXXIII and S and their subformulae. [0464] The LC medium comprises one or more compounds of the Formulae I or its subformulae and ST and/or H, II and/or III and one or more compounds selected from the group consisting of the Formulae Z1, Z2, Z3, Z4, Z5, IV, VI, XII, XIV, XVI, XVIIa, XVIIb, XVIIc, XX, LP1-1, XXIII, XXIX and S and their subformulae. [0465] The LC medium comprises one or more compounds selected from the group consisting of the Formula II-1, 11-2 and 11-3, very preferably from the Formula II-1 and 11-2. The individual concentration of each of these compounds is preferably from 2 to 15% by weight. The total concentration of these compounds is preferably from 5 to 25% by weight. [0466] The LC medium comprises one or more compounds selected from the group consisting of the Formula III-1, 111-4, 111-6, 111-16, 111-19 and 111-20, very preferably from the group consisting of the Formula III-1, 111-6, 111-16 and 111-20. The individual concentration of each of these compounds is preferably from 2 to 15% by weight. The total concentration of these compounds is preferably from 5 to 30% by weight. [0467] The LC medium comprises one or more compounds of the Formula IV, preferably selected from the Formula Va or IVc, very preferably from the Formula IVa-1 or IVc-1, most preferably of the Formula IVc-1. The individual concentration of each of these compounds is preferably from 2 to 15% by weight. The total concentration of these compounds is preferably from 5 to 20% by weight. [0468] The LC medium comprises one or more compounds of the Formula VI, preferably selected from the Formula VIb. The individual concentration of each of these compounds is preferably from 1 to 20% by weight. The total concentration of these compounds is preferably from 5 to 20% by weight. [0469] The LC medium comprises one or more compounds of the Formula Z1, preferably selected from the Formula Z1-1. The total concentration of these compounds is preferably from 1 to 60% by weight, more preferably 5 to 50% by weight. [0470] The LC medium comprises one or more compounds of the Formula Z2, preferably selected from the Formulae Z2-1 and Z2-2. The total concentration of these compounds is preferably from 2 to 35%, very preferably from 3 to 25% by weight. [0471] The LC medium comprises from 5 to 20% by weight of compounds of the Formula Z3, preferably of the Formula Z3-1. [0472] The LC medium comprises from 5 to 20% by weight of compounds of the Formula Z4, preferably of the Formula Z4-1. [0473] The LC medium comprises from 10 to 65%, very preferably from 20 to 60% by weight of compounds of Formula Z5. [0474] The LC medium comprises one or more compounds of the Formula LP1-1, preferably of the Formula LP1-1a, very preferably of the Formula LP1-1a. The concentration of these compounds is preferably from 2 to 15% by weight. [0475] The LC medium comprises one or more compounds of the Formula XII, preferably of the Formula XIIa or XIIb, very preferably of the Formula XIIa, most preferably of the Formula XIIa-1. The concentration of these compounds is preferably from 2 to 15% by weight. [0476] The LC medium comprises from 1 to 15% by weight of compounds of the Formula XIIb. [0477] The LC medium comprises one or more compounds of the Formula XIV, preferably of the Formula XIVd, very preferably of the Formula XIVd-1. The concentration of these compounds is preferably from 2 to 10% by weight. [0478] The LC medium comprises one or more compounds of the Formula XVIb, preferably of the Formula XVIb-1, XVIb-2 and/or XVIb-3. The concentration of these compounds is preferably from 2 to 15% by weight. [0479] The LC medium comprises one or more compounds of the Formula XVIc, preferably of the Formula XVIc-1, XVIc-2 and/or XVIc-3. The concentration of these compounds is preferably from 2 to 20% by weight. [0480] The LC medium comprises one or more compounds selected from the group consisting of the Formulae XVIIa, XVIIb and XVIIc, very preferably of the Formula XVIIa wherein L is H and of the Formula XVIIb wherein L is F. The total concentration of these compounds is preferably from 0.5 to 5% by weight. [0481] The LC medium comprises one or more compounds of the Formula XX, preferably of the Formula XXa. The concentration of these compounds is preferably from 2 to 10% by weight. [0482] The LC medium comprises one or more compounds of the Formula XXI, preferably of the Formula XXIa. The concentration of these compounds is preferably from 2 to 10% by weight. [0483] The LC medium comprises one or more compounds of the Formula XXIII, preferably of the Formula XXIIIa. The concentration of these compounds is preferably from 0.5 to 5% by weight. [0484] The LC medium comprises one or more compounds of the Formula XXIX, preferably of the Formula XXIXa. The concentration of these compounds is preferably from 2 to 10% by weight. [0485] The LC medium comprises one or more compounds of the Formula XXX. The concentration of these compounds is preferably from 2 to 10% by weight. [0486] The LC medium comprises one or more compounds of the Formula XII. The concentration of these compounds is preferably from 2 to 10% by weight. [0487] The LC medium comprises one or more compounds of the Formula I, ST, H, II and/or III, one or more compounds selected from the group consisting of the Formulae Z1, Z2 and Z3 or their subformulae, one or more compounds selected from the group consisting of the Formula XIV, one or more compounds selected from the group consisting of the Formulae IV, VI, XX, XXIII and XXIX or their subformulae, and one or more compounds selected from the group consisting of the Formulae XVI, XVIIa, XVIIb, XVIIc or their subformulae. [0488] The LC medium comprises one or more compounds of Formula I, ST, II and/or III, one or more compounds selected from the group consisting of the Formulae Z1, Z2, Z3, Z4 and Z5 or their subformulae, one or more compounds selected from the group consisting of the Formula XIVd or their subformulae, one or more compounds selected from the group consisting of the Formulae IVc, VIb, XXa, XXIIIa and XXIXa or their subformulae, and one or more compounds selected from the group consisting of the Formulae LP1-1b, XVIb, XVIc, XVIIa, XVIIb, XVIIc or their subformulae. [0489] The LC medium comprises one or more compounds of the Formula I, ST, II and/or III, one or more compounds selected from the group consisting of the Formulae Z1, Z2 and Z3 or their subformulae, one or more compounds of the Formula Y, preferably selected from the group consisting of the Formulae Y1 and Y2, one or more compounds selected from the group consisting of the Formula XIV, one or more compounds selected from the group consisting of the Formulae II, III, IV, VI, XX, XXIII and XXIX or their subformulae, and one or more compounds selected from the group consisting of the Formulae XVI, XVIIa, XVIIb, XVIIc or their subformulae. [0490] The LC medium comprises one or more compounds of the Formula I one or more compounds selected from the group consisting of the Formulae Z1, Z2, Z3, Z4 and Z5 or their subformulae, one or more compounds of Formula B, preferably selected from the group consisting of the Formulae B1, B2 and B3, one or more compounds of the Formula XIVd or their subformulae, one or more compounds selected from the group consisting of the Formulae II, III, IVc, VIb, XXa, XXIIIa and XXIXa or their subformulae, and one or more compounds selected from the group consisting of the Formulae LP1-1 b, XVIb, XVIc, XVIIa, XVIIb, XVIIc or their subformulae. [0491] Besides the compounds of the Formula I, the LC medium comprises further compounds selected from the group of the compounds of the Formula Z1, Z2, Z3, IV, LP1-1, XIV, XVI, XVIIa, XVIIb, XVIIc, XXI, XXIII, XXIX, XXX and XXIV or their subformulae. [0492] Besides the compounds of the Formula I, the LC medium comprises further compounds selected from the group of the compounds of the Formulae Z1, Z2, Z3, IV, XIV, XVI, XVIIa, XVIIb, XVIIc, XXI, XXIII, XXIX, XXX and XXIV or their subformulae. [0493] The proportion of compounds of the Formula I or its subformulae in the LC medium is from 1 to 30%, very preferably from 2 to 25%, most preferably from 2 to 20% by weight. [0494] The proportion of compounds of the Formulae Z1, Z2, Z3, Z4 and Z5 or their subformulae in the LC medium as a whole is from 10 to 65%, very preferably from 20 to 60% by weight. [0495] The proportion of compounds of the Formula Y or its subformulae in the LC medium as a whole is from 0 to 15%, very preferably from 2 to 10% by weight. [0496] The proportion of compounds of the Formula B or its subformulae in the LC medium as a whole is from 0 to 15%, very preferably from 2 to 10% by weight. [0497] The proportion of compounds of the Formulae II, III, IVVIII, XVIII-XXIII and XXVII-XXX in the LC medium as a whole is 30 to 60% by weight. [0498] The proportion of compounds of the Formulae XIV and XV in the LC medium as a whole is 40 to 70% by weight. [0499] The proportion of compounds of the Formulae XIV, XVIIa-c and XXXII in the LC medium as a whole is 0.5 to 15% by weight.

[0500] The term alkyl or alkyl in this application encompasses straight-chain and branched alkyl groups having 1 to 6 carbon atoms, in particular the straight-chain groups methyl, ethyl, propyl, butyl, pentyl and hexyl. Groups having 2 to 5 carbon atoms are generally preferred.

[0501] The term alkenyl or alkenyl* encompasses straight-chain and branched alkenyl groups having 2 to 6 carbon atoms, in particular the straight-chain groups. Preferred alkenyl groups are C.sub.2-7-1E-alkenyl, C.sub.4-C.sub.6-3E-alkenyl, in particular C.sub.2-C.sub.6-1E-alkenyl. Examples of particularly preferred alkenyl groups are vinyl, E-propenyl, 1E-butenyl, 1E-pentenyl, 1E-hexenyl, 3-butenyl, 3E-pentenyl, 3E-hexenyl, 4-pentenyl, 4Z-hexenyl, 4E-hexenyl and 5-hexenyl. Groups having up to 5 carbon atoms are generally preferred, in particular CH.sub.2CH, CH.sub.3CHCH.

[0502] The term fluoroalkyl preferably encompasses straight-chain groups having a terminal fluorine, i.e. fluoromethyl, 2-fluoroethyl, 3-fluoropropyl, 4-fluorobutyl, 5-fluoropentyl, 6-fluorohexyl and 7-fluoroheptyl. However, other positions of the fluorine are not excluded.

[0503] The term oxaalkyl or alkoxy preferably encompasses straight-chain groups of the Formula C.sub.nH.sub.2n+1O(CH.sub.2).sub.m, in which n and m each, independently of one another, denote 1 to 6. m may also denote 0. Preferably, n=1 and m=1 to 6 or m=0 and n=1 to 3. Further preferably the alkoxy or oxaalkyl group can also contain one or more further O atoms such that oxygen atoms are not directly linked to one another.

[0504] Through a suitable choice of the meanings of R.sup.0 and X.sup.0 in Formulae II and III, the addressing times, the threshold voltage, the steepness of the transmission characteristic lines, etc., can be modified in the desired manner. For example, 1E-alkenyl groups, 3E-alkenyl groups, 2E-alkenyloxy groups and the like generally result in shorter addressing times, improved nematic tendencies and a higher ratio between the elastic constants K.sub.3 (bend) and K.sub.1 (splay) compared with alkyl and alkoxy groups. 4-Alkenyl groups, 3-alkenyl groups and the like generally give lower threshold voltages and lower values of K.sub.3/K.sub.1 compared with alkyl and alkoxy groups. The LC media according to the invention are distinguished, in particular, by high values and thus have significantly faster response times than the LC media from the prior art.

[0505] The optimum mixing ratio of the compounds of the above-mentioned formulae depends substantially on the desired properties, on the choice of the components of the above-mentioned formulae and on the choice of any further components that may be present.

[0506] Suitable mixing ratios within the range indicated above can easily be determined from case to case.

[0507] The total amount of compounds of the above-mentioned formulae in the LC media according to the invention is not crucial. The LC media can therefore comprise one or more further components for the purposes of optimisation of various properties.

[0508] However, the observed effect on the desired improvement in the properties of the medium is generally greater, the higher the total concentration of compounds of the above-mentioned formulae.

[0509] In a particularly preferred embodiment, the LC media according to the invention comprise compounds of the Formulae IV to VIII (preferably IV and V) in which X.sup.0 denotes F, OCF.sub.3, OCHF.sub.2, OCHCF.sub.2, OCF=CF.sub.2 or OCF.sub.2CF.sub.2H. A favourable synergistic action with the compounds of the Formula I, an antioxidant and, if present, a light stabilizer results in particularly advantageous properties. In particular, LC media comprising compounds of the Formula I, an antioxidant, a light stabilizer, II and/or III are distinguished by their low threshold voltage.

[0510] The individual compounds of the above-mentioned formulae and the subformulae thereof which can be used in the LC media according to the invention are either known or can be prepared analogously to the known compounds.

[0511] The invention also relates to a process for the preparation of a LC medium as described above and below, by mixing one or more compounds of the Formula I, an antioxidant, a light stabilizer and one or more compounds selected from the group consisting of the Formulae II, III, Z1, Z2, Z3, Z4, IV, VI, XIV, XVI, XVIIa, XVIIb, XVIIc, XX, XXIII, XXIX.

[0512] The LC medium of the present invention may optionally comprise one or more polymerisable compounds. The polymerisable compounds are preferably selected from the Formula M

R.sup.aB.sup.1(Z.sup.bB.sup.2).sub.mR.sup.bM [0513] in which the individual substituents, on each occurrence identically or differently, and each, independently of one another, have the following meaning: [0514] NCSOCNR.sup.a and R.sup.b P, P-Sp-, H, F, Cl, Br, I, CN, NO.sub.2, NCO, -, -, SCN, SF.sub.5 or straight-chain or branched alkyl having 1 to 25 C atoms, in which, in addition, one or more non-adjacent CH.sub.2 groups may each be replaced, independently of one another, by C(R.sup.0)C(R.sup.00), CC, [0515] NCSOCNN(R.sup.00), O, S, CO, COO, OCO, OCOO in such a way that O and/or S atoms are not linked directly to one another, and in which, in addition, one or more H atoms may be replaced by F, C, Br, I, CN, P or P-Sp-, where, if B.sup.1 and/or B.sup.2 contain a saturated C atom, R.sup.a and/or R.sup.b may also denote a group which is spiro-linked to this saturated C atom, [0516] wherein at least one of the substituents R.sup.a and R.sup.b denotes or contains a group P or P-Sp-, [0517] P a polymerisable group, [0518] Sp a spacer group or a single bond, [0519] B.sup.1 and B.sup.2 an aromatic, heteroaromatic, alicyclic or heterocyclic group, preferably having 4 to 25 ring atoms, which may also contain fused rings, and which is unsubstituted, or mono- or polysubstituted by L, [0520] Z.sup.b O, S, CO, COO, OCO, OCOO, OCH.sub.2, CH.sub.2O, SCH.sub.2, [0521] CH.sub.2S, CF.sub.2O, OCF.sub.2, CF.sub.2S, SCF.sub.2, (CH.sub.2).sub.n1, CF.sub.2CH.sub.2, CH.sub.2CF.sub.2, (CF.sub.2).sub.n1, CHCH, CF=CF, CC, CHCHCOO, OCOCHCH, CR.sup.0R.sup.00 or a single bond, [0522] R.sup.0 and R.sup.00 each, independently of one another, denote H or alkyl having 1 to 12 C atoms, [0523] m denotes 0, 1, 2, 3 or 4, [0524] n1 denotes 1, 2, 3 or 4, [0525] L P, P-Sp-, OH, CH.sub.2OH, F, Cl, Br, I, CN, NO.sub.2, NCO, NCS, OCN, SCN, C(O)N(R.sup.x).sub.2, C(O)Y.sup.1, C(O)R.sup.x, N(R.sup.x).sub.2, optionally substituted silyl, optionally substituted aryl having 6 to 20 C atoms, or straight-chain or branched alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy having 1 to 25 C atoms, in which, in addition, one or more H atoms may be replaced by F, C, P or P-Sp-, [0526] P and Sp have the meanings indicated in the Formula M above, [0527] Y.sup.1 denotes halogen, [0528] R.sup.x denotes P, P-Sp-, H, halogen, straight-chain, branched or cyclic alkyl having 1 to 25 C atoms, in which, in addition, one or more non-adjacent CH.sub.2 groups may be replaced by O, S, CO, COO, [0529] OCO, OCOO in such a way that O and/or S atoms are not linked directly to one another, and in which, in addition, one or more H atoms may be replaced by F, C, P or P-Sp-, an optionally substituted aryl or aryloxy group having 6 to 40 C atoms, or an optionally substituted heteroaryl or heteroaryloxy group having 2 to 40 C atoms.

[0530] Further preferably, the LC media according to the present invention comprise one or more polymerisable compounds selected from Table H below.

[0531] Preferably, the proportion of polymerisable compounds in the LC medium, preferably selected from the Formula M and Table H, is from 0.01 to 5%, very preferably from 0.05 to 1%, most preferably from 0.1 to 0.5%.

[0532] It was observed that the addition of one or more polymerisable compounds to the LC medium, like those selected from the Formula M and Table H, leads to advantageous properties like fast response times. Such a LC medium is especially suitable for use in PSA displays where it shows low image sticking, a quick and complete polymerisation, the quick generation of a low pretilt angle which is stable after UV exposure, a high reliability, high VHR value after UV exposure, and a high birefringence. By appropriate selection of the polymerisable compounds it is possible to increase the absorption of the LC medium at longer UV wavelengths, so that it is possible to use such longer UV wavelengths for polymerisation, which is advantageous for the display manufacturing process.

[0533] The polymerisable group P is a group which is suitable for a polymerisation reaction, such as, for example, free-radical or ionic chain polymerisation, polyaddition or polycondensation, or for a polymer-analogous reaction, for example addition or condensation onto a main polymer chain. Particular preference is given to groups for chain polymerisation, in particular those containing a CC double bond or CC triple bond, and groups which are suitable for polymerisation with ring opening, such as, for example, oxetane or epoxide groups.

[0534] Preferred groups P are selected from the group consisting of CH.sub.2CW.sup.1COO, CH.sub.2=CW.sup.1CO,

##STR00189##

CH.sub.2=CW.sup.2(O).sub.k3, CW.sup.1CHCO(O).sub.k3, CW.sup.1CHCONH, CH.sub.2=CW.sup.1CONH, CH.sub.3CHCHO, (CH.sub.2CH).sub.2CHOCO, (CH.sub.2CHCH.sub.2).sub.2CHOCO, (CH.sub.2CH).sub.2CHO, (CH.sub.2CHCH.sub.2).sub.2N, (CH.sub.2CHCH.sub.2).sub.2NCO, HOCW.sup.2W.sup.3, HSCW.sup.2W.sup.3, HW.sup.2N, HOCW.sup.2W.sup.3NH, CH.sub.2=CW.sup.1CONH, CH.sub.2CH(COO).sub.k1-Phe-(O).sub.k2, CH.sub.2CH(CO).sub.k1-Phe-(O).sub.k2, Phe-CHCH, HOOC, OCN and W.sup.4W.sup.5W.sup.6Si, in which W.sup.1 denotes H, F, Cl, CN, CF.sub.3, phenyl or alkyl having 1 to 5 C atoms, in particular H, F, C.sub.1 or CH.sub.3, W.sup.2 and W.sup.3 each, independently of one another, denote H or alkyl having 1 to 5 C atoms, in particular H, methyl, ethyl or n-propyl, W.sup.4, W.sup.5 and W.sup.6 each, independently of one another, denote Cl, oxaalkyl or oxacarbonylalkyl having 1 to 5 C atoms, W.sup.7 and W.sup.8 each, independently of one another, denote H, Cl or alkyl having 1 to 5 C atoms, Phe denotes 1,4-phenylene, which is optionally substituted by one or more substituents L as defined for the Formula M above which are other than P-Sp-, k.sub.1, k.sub.2 and k.sub.3 each, independently of one another, denote 0 or 1, k.sub.3 preferably denotes 1, and k.sub.4 denotes an integer from 1 to 10.

[0535] Very preferred groups P are selected from the group consisting of CH.sub.2CW.sup.1COO, CH.sub.2=CW.sup.1CO,

##STR00190##

CH.sub.2=CW.sup.2O, CHCW.sup.2, CW.sup.1CHCO(O).sub.k3, CW.sup.1CHCONH, CH.sub.2=CW.sup.1CONH, (CH.sub.2CH).sub.2CHOCO, (CH.sub.2CHCH.sub.2).sub.2CHOCO, (CH.sub.2CH).sub.2CHO, (CH.sub.2CHCH.sub.2).sub.2N, (CH.sub.2CHCH.sub.2).sub.2NCO, CH.sub.2=CW.sup.1CONH, CH.sub.2CH(COO).sub.k1-Phe-(O).sub.k2, CH.sub.2CH(CO).sub.k1-Phe-(O).sub.k2, Phe-CHCH and W.sup.4W.sup.5W.sup.6Si, in which W.sup.1 denotes H, F, Cl, CN, CF.sub.3, phenyl or alkyl having 1 to 5 C atoms, in particular H, F, Cl or CH.sub.3, W.sup.2 and W.sup.3 each, independently of one another, denote H or alkyl having 1 to 5 C atoms, in particular H, methyl, ethyl or n-propyl, W.sup.4, W.sup.5 and W.sup.6 each, independently of one another, denote Cl, oxaalkyl or oxacarbonylalkyl having 1 to 5 C atoms, W.sup.7 and W.sup.8 each, independently of one another, denote H, C or alkyl having 1 to 5 C atoms, Phe denotes 1,4-phenylene, k.sub.1, k.sub.2 and k.sub.3 each, independently of one another, denote 0 or 1, k.sub.3 preferably denotes 1, and k.sub.4 denotes an integer from 1 to 10.

[0536] Very particularly preferred groups P are selected from the group consisting of CH.sub.2CW.sup.1COO, in particular CH.sub.2CHCOO, CH.sub.2=C(CH.sub.3)COO and CH.sub.2=CFCOO, furthermore CH.sub.2CHO, (CH.sub.2CH).sub.2CHOCO, (CH.sub.2CH).sub.2CHO,

##STR00191##

[0537] Further preferred polymerisable groups P are selected from the group consisting of vinyloxy, acrylate, methacrylate, fluoroacrylate, chloroacrylate, oxetane and epoxide, most preferably from acrylate and methacrylate.

[0538] If Sp is different from a single bond, it is preferably of the Formula Sp-X, so that the respective substituent P-Sp- conforms to the Formula P-Sp-X, wherein [0539] Sp denotes alkylene having 1 to 20, preferably 1 to 12, C atoms, which is optionally mono- or polysubstituted by F, C, Br, I or CN and in which, in addition, one or more non-adjacent CH.sub.2 groups may each be replaced, independently of one another, by O, S, NH, N(R.sup.0), Si(R.sup.0R.sup.00), CO, COO, OCO, OCOO, SCO, COS, N(R.sup.00)COO, OCON(R.sup.0), N(R.sup.0)CON(R.sup.00), CHCH or CC in such a way that O and/or S atoms are not linked directly to one another, [0540] X denotes O, S, CO, COO, OCO, OCOO, CON(R.sup.0), N(R.sup.0)CO, N(R.sup.0)CON(R.sup.00), OCH.sub.2, CH.sub.2O, SCH.sub.2, CH.sub.2S, CF.sub.2O, OCF.sub.2, CF.sub.2S, SCF.sub.2, CF.sub.2CH.sub.2, CH.sub.2CF.sub.2, CF.sub.2CF.sub.2, CHN, NCH, NN, CHCR.sup.0, CY.sup.2=CY.sup.3, CC, CHCHCOO, OCOCHCH or a single bond, [0541] R.sup.0 and R.sup.00 each, independently of one another, denote H or alkyl having 1 to 20 C atoms, and [0542] Y.sup.2 and Y.sup.3 each, independently of one another, denote H, F, Cl or CN. [0543] X is preferably O, S, CO, COO, OCO, OCOO, CONR.sup.0, NR.sup.0CO, NR.sup.0CONR.sup.00 or a single bond.

[0544] Typical spacer groups Sp and -Sp-X are, for example, (CH.sub.2).sub.p1, (CH.sub.2CH.sub.2O).sub.g1CH.sub.2CH.sub.2, CH.sub.2CH.sub.2SCH.sub.2CH.sub.2, CH.sub.2CH.sub.2NHCH.sub.2CH.sub.2 or (SiR.sup.0R.sup.00O).sub.p1, in which p1 is an integer from 1 to 12, q1 is an integer from 1 to 3, and R.sup.0 and R.sup.00 have the meanings indicated in the Formula M above.

[0545] Particularly preferred groups Sp and -Sp-X are (CH.sub.2).sub.p1, (CH.sub.2).sub.p1O, (CH.sub.2).sub.p1OCO, (CH.sub.2).sub.p1COO, (CH.sub.2).sub.p1OCOO, in which p1 and q1 have the meanings indicated above.

[0546] Particularly preferred groups Sp are, in each case straight-chain, ethylene, propylene, butylene, pentylene, hexylene, heptylene, octylene, nonylene, decylene, undecylene, dodecylene, octadecylene, ethyleneoxyethylene, methyleneoxybutylene, ethylenethioethylene, ethylene-N-methyliminoethylene, 1-methylalkylene, ethenylene, propenylene and butenylene.

[0547] For the production of PSA displays, the polymerisable compounds contained in the LC medium are polymerised or crosslinked (if one compound contains two or more polymerisable groups) by in-situ polymerisation in the LC medium between the substrates of the LC display, optionally while a voltage is applied to the electrodes.

[0548] The structure of the PSA displays according to the invention corresponds to the usual geometry for PSA displays, as described in the prior art cited at the outset. Geometries without protrusions are preferred, in particular those in which, in addition, the electrode on the colour filter side is unstructured and only the electrode on the TFT side has slots. Particularly suitable and preferred electrode structures for PS-VA displays are described, for example, in US 2006/0066793 A1.

[0549] The combination of compounds of the preferred embodiments mentioned above with the polymerised compounds described above causes low threshold voltages, low rotational viscosities and very good low-temperature stabilities in the LC media according to the invention at the same time as constantly high clearing points and high VHR values.

[0550] The use of LC media containing polymerisable compounds allows the rapid establishment of a particularly low pretilt angle in PSA displays. In particular, the LC media exhibit significantly shortened response times, in particular also the grey-shade response times, in PSA displays compared with the media from the prior art.

[0551] Preference is generally given to LC media which have a nematic LC phase, and preferably have no chiral liquid crystal phase.

[0552] The invention also relates to the use of a LC medium according to the present invention as described above and below for electro-optical purposes, in particular for the use is in shutter glasses, for 3D applications, in TN, PS-TN, STN, TN-TFT, OCB, IPS, PS-IPS, FFS, HB-FFS, XB-FFS, PS-FFS, positive VA and positive PS-VA displays, and to electro-optical displays, in particular of the aforementioned types, containing a LC medium according to the present invention as described above and below, in particular a TN, PS-TN, STN, TN-TFT, OCB, IPS, PS-IPS, FFS, HB-FFS, XB-FFS, PS-FFS, positive VA (vertically aligned) or positive PS-VA display.

[0553] The invention also relates to electro-optical displays, such as, for example, STN or matrix LC (MLC) displays, having two plane-parallel outer plates, which, together with a frame, form a cell, integrated non-linear elements for switching individual pixels on the outer plates, and a nematic LC medium having positive dielectric anisotropy and high specific resistance located in the cell, wherein the nematic LC medium is a LC medium according to the present invention as described above and below.

[0554] The LC media according to the invention enable a significant broadening of the available parameter latitude. The achievable combinations of clearing point, rotational viscosity, thermal- and UV stability and high optical anisotropy are far superior to previous materials from the prior art.

[0555] In particular, the combination of compounds of the Formula I with at least one antioxidant, at least one light stabilizer and, optionally, with compounds selected from the Formulae II-XXXII or their subformulae, leads to LC media which show a reduced short-term image sticking and reduced long-term image sticking as well as low rotational viscosity resulting in fast response times. This enables fast energy saving LC displays, especially of the FFS, HB-FFS, XB-FFS and IPS mode.

[0556] The LC media according to the invention are suitable for mobile applications and TFT applications, such as, for example, mobile telephones and PDAs. Furthermore, the LC media according to the invention are particularly suitably for use in FFS, HB-FFS, XB-FFS and IPS displays based on dielectrically positive liquid crystals.

[0557] The LC media according to the present invention, while retaining the nematic phase down to 20 C. and preferably down to 30 C., particularly preferably down to 40 C., and the clearing point 75 C., preferably 80 C., at the same time allow rotational viscosities .sub.1 of 120 mPa.Math.s, particularly preferably 100 mPa-s, to be achieved, enabling excellent MLC displays having fast response times to be achieved. The rotational viscosities are determined at 20 C.

[0558] The dielectric anisotropy of the LC media according to the invention at 20 C. and 1 kHz is preferably +1.5, very preferably from +3 to +18, most preferred from +5 to +15.

[0559] The birefringence n of the LC media according to the invention at 20 C. is preferably from 0.08 to 0.2, very preferably from 0.09 to 0.15.

[0560] The rotational viscosity .sub.1 of the LC media according to the invention is preferably 120 mPa.Math.s, more preferably 110 mPa.Math.s, very preferably 90 mPa.Math.s.

[0561] The ratio .sub.1/K.sub.1 (wherein .sub.1 is the rotational viscosity and K.sub.1 is the elastic constant for splay deformation) of the LC media according to the invention is preferably 7 mPa.Math.s/pN, very preferably 6 mPa.Math.s/pN, most preferably 5.5 mPa.Math.s/pN.

[0562] The average elasticity constant ratio Kav of the LC media according to the invention is preferably at least 14.0 pN, very preferably at least 15.0 pN, most preferably at least 16.0 pN. Kav can be calculated according to the following formula: Kav=(K.sub.1+K.sub.2+K.sub.3)/3(K.sub.1+1/2%2*K.sub.1+K.sub.3)/3.

[0563] The nematic phase range of the LC media according to the invention preferably has a width of at least 90 C., more preferably of at least 100 C., in particular at least 110 C. This range preferably extends at least from 25 C. to +90 C.

[0564] It goes without saying that, through a suitable choice of the components of the LC media according to the invention, it is also possible for higher clearing points (for example above 100 C.) to be achieved at higher threshold voltages or lower clearing points to be achieved at lower threshold voltages with retention of the other advantageous properties. At viscosities correspondingly increased only slightly, it is likewise possible to obtain LC media having a higher and thus low thresholds. The MLC displays according to the invention preferably operate at the first Gooch and Tarry transmission minimum [C. H. Gooch and H. A. Tarry, Electron. Lett. 10, 2-4, 1974; C. H. Gooch and H. A. Tarry, Appl. Phys., Vol. 8, 1575-1584, 1975], where, besides particularly favourable electro-optical properties, such as, for example, high steepness of the characteristic line and low angle dependence of the contrast (German patent 30 22 818), lower dielectric anisotropy is sufficient at the same threshold voltage as in an analogous display at the second minimum. This enables significantly higher specific resistance values to be achieved using the LC media according to the invention at the first minimum than in the case of LC media comprising cyano compounds. Through a suitable choice of the individual components and their proportions by weight, the person skilled in the art is able to set the birefringence necessary for a pre-specified layer thickness of the MLC display using simple routine methods.

[0565] Measurements of the voltage holding ratio (VHR) [S. Matsumoto et al., Liquid Crystals 5, 1320 (1989); K. Niwa et al., Proc. SID Conference, San Francisco, June 1984, p. 304 (1984); G. Weber et al., Liquid Crystals 5, 1381 (1989)]have shown that LC media according to the invention exhibit a significantly smaller decrease in the VHR on UV exposure than analogous LC media comprising cyanophenylcyclohexanes of the Formula

##STR00192##

or esters of the Formula.

##STR00193##

[0566] The light stability and UV stability of the LC media according to the invention are considerably better, i.e. they exhibit a significantly smaller decrease in the HR on exposure to light, heat or UV.

[0567] The construction of the MLC display according to the invention from polarisers, electrode base plates and surface-treated electrodes corresponds to the usual design for displays of this type. The term usual design is broadly drawn here and also encompasses all derivatives and modifications of the MLC display, in particular including matrix display elements based on poly-Si TFTs or MIM.

[0568] A significant difference between the displays according to the invention and the hitherto conventional displays based on the twisted nematic cell consists, however, in the choice of the LC parameters of the LC layer.

[0569] The LC media which can be used in accordance with the invention are prepared in a manner conventional per se, for example by mixing compounds of Formula I with one or more compounds of the Formulae II-XXXII or with further LC compounds and/or additives. In general, the desired amount of the components used in lesser amount is dissolved in the components making up the principal constituent, advantageously at elevated temperature. It is also possible to mix solutions of the components in an organic solvent, for example in acetone, chloroform or methanol, and to remove the solvent again, for example by distillation, after thor-ough mixing.

[0570] The LC media may also comprise further additives known to the person skilled in the art and described in the literature, such as, for example, polymerisation initiators, inhibitors, surface-active substances, microparticles, free-radical scaven-gers, nanoparticles, etc. For example, 0 to 15% of pleochroic dyes or chiral dopants or initiators like Irgacure651 or Irgacure907 can be added. Suitable stabilisers and dopants are mentioned below in Tables F and G. In a preferred embodiment, the LC medium comprises one or more stabilisers selected from Table G. Preferably, the proportion of antioxidants and light stabilisers, like those of the Formula ST and H, as described above or listed in Table G, in the LC medium is from 10 to 2000 ppm, very preferably from 30 to 1000 ppm.

[0571] Furthermore, it is possible to add to the LC media, for example, 0 to 15% by weight of pleochroic dyes, furthermore nanoparticles, conductive salts, preferably ethyldimethyldodecylammonium 4-hexoxybenzoate, tetrabutylammonium tetraphenylborate or complex salts of crown ethers (cf., for example, Haller et al., Mol. Cryst. Liq. Cryst. 24, 249-258 (1973)), for improving the conductivity, or substances for modifying the dielectric anisotropy, the viscosity and/or the alignment of the nematic phases. Substances of this type are described, for example, in DE-A 22 09 127, 22 40 864, 23 21 632, 23 38 281, 24 50 088, 26 37 430 and 28 53 728.

[0572] For the present invention and in the following examples, the structures of the LC compounds are indicated by means of acronyms, with the transformation into chemical formulae taking place in accordance with Tables A to C below. All substituents C.sub.mH.sub.2m+1, C.sub.nH.sub.2n+1, and C.sub.lH.sub.2l+1 or C.sub.mH.sub.2m1, C.sub.nH.sub.2n1 and C.sub.lH.sub.2l1 are straight-chain alkyl groups or alkylene groups, in each case having n, m and I C atoms respectively. Preferably, n, m and l are independently of each other 1, 2, 3, 4, 5, 6, or 7. Table A shows the codes for the ring elements of the nuclei of the compound, Table B lists the bridging units, and Table C lists the meanings of the symbols for the left- and right-hand end groups of the molecules. The acronyms are composed of the codes for the ring elements with optional linking groups, followed by a first hyphen and the codes for the left-hand end group, and a second hyphen and the codes for the right-hand end group. Table D shows illustrative structures of compounds together with their respective abbreviations.

TABLE-US-00001 TABLE A Ring elements C [00194] D [00195] Dl [00196] A [00197] Al [00198] P [00199] G [00200] Gl [00201] U [00202] Ul [00203] Y [00204] U(1) [00205] P(F, Cl)Y [00206] P(Cl, F)Y [00207] np [00208] n3f [00209] nN3fl [00210] th [00211] thl [00212] tH2f [00213] tH2fl [00214] o2f [00215] o2fl [00216] dh [00217] B [00218] B(S) [00219] O [00220] S [00221] K [00222] Kl [00223] L [00224] Ll [00225] F [00226] Fl [00227] Bh [00228] Bh(S) [00229] Bf [00230] Bf(S) [00231] Bfi [00232] Bfi(S) [00233]

TABLE-US-00002 TABLE B Bridging units E CH.sub.2CH.sub.2 V CHCH T CC W CF.sub.2CF.sub.2 B CFCF Z COO ZI OCO X CFCH XI CHCF O CH.sub.2O OI OCH.sub.2 Q CF.sub.2O QI OCF.sub.2

TABLE-US-00003 TABLE C End groups On the left individually or in On the right individually or in combination combination -n- C.sub.nH.sub.2n+1 -n C.sub.nH.sub.2n+1 -nO C.sub.nH.sub.2n+1O On OC.sub.nH.sub.2n+1 V CH.sub.2CH V CHCH.sub.2 -nV C.sub.nH.sub.2n+1CHCH -nV C.sub.nH.sub.2nCHCH.sub.2 Vn- CH.sub.2CHC.sub.nH.sub.2n Vn CHCHC.sub.nH.sub.2n+1 -nVm- C.sub.nH.sub.2n+1CHCH -nVm C.sub.nH.sub.2nCHCH C.sub.mH.sub.2m C.sub.mH.sub.2m+1 N NC N CN S SCN S NCS F F F F CL Cl CL Cl M CFH.sub.2 M CFH.sub.2 D CF.sub.2H D CF.sub.2H T CF.sub.3 T CF.sub.3 MO CFH.sub.2O OM OCFH.sub.2 DO CF.sub.2HO OD OCF.sub.2H TO CF.sub.3O OT OCF.sub.3 A HCC A CCH -nA C.sub.nH.sub.2n+1CC An CCC.sub.nH.sub.2n+1 NA NCCC AN CCCN -(cn)- [00234] -(cn) [00235] -(cn)m- [00236] -m(cn) [00237] On the left only in combination On the right only in combination - ... n ... - C.sub.nH.sub.2n - ... n ... C.sub.nH.sub.2n - ... M ... - CFH - ... M ... CFH - ... D ... - CF.sub.2 - ... D ... CF.sub.2 - ...V ... - CHCH - ... V ... CHCH - ... Z ... - COO - ... Z ... COO - ... Zl ... - OCO - ... ZI ... OCO - ... K ... - CO - ... K ... CO - ... W ... - CFCF - ... W ... CFCF [0573] in which n and m are each integers, and the three dots . . . are placeholders for other abbreviations from this table.

[0574] The following abbreviations are used: [0575] (n, m, k and l are, independently of one another, each an integer, preferably 1 to 12 preferably 1 to 6, k and l possibly may be also 0 and preferably are 0 to 4, more preferably 0 or 2 and most preferably 2, n preferably is 1, 2, 3, 4 or 5, in the combination -nO it preferably is 1, 2, 3 or 4, preferably 2 or 4, m preferably is 1, 2, 3, 4 or 5, in the combination -Om it preferably is 1, 2, 3 or 4, more preferably 2 or 4. The combination IVm preferably is 2V1.)

[0576] Preferred components of the LC medium are shown in Tables D and E.

TABLE-US-00004 TABLE D [00238] PYP [00239] PYRP [00240] MEnFF [00241] MEnm [00242] MEnN [00243] MEnNF [00244] MEnOm [00245] MEnOm [00246] MEnONF [00247] MEnOOm [00248] MEnOOmF [00249] MEnS [00250] HP-nNF [00251] HP-nFF [00252] HP-nF [00253] HP-nN [00254] BCH [00255] CBC [00256] CCH [00257] CCP [00258] CPTP [00259] CEPTP [00260] ECCP [00261] CECP [00262] EPCH [00263] PCH [00264] CH [00265] PTP [00266] CCPC [00267] CP [00268] BECH [00269] EBCH [00270] CPC [00271] B [00272] FET-nF [00273] CGG [00274] CGU [00275] CFU

TABLE-US-00005 TABLE E In the following formulae, n and m each, independently of one another, denote 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12, in particular 2, 3, 5, furthermore 0, 4, 6. [00276] APU-n-OXF [00277] ACQU-n-F [00278] APUQU-n-F [00279] BCH-nFm [00280] CFU-n-F [00281] CBC-nmF [00282] ECCP-nm [00283] CCZU-n-F [00284] PGP-n-m [00285] CGU-n-F [00286] PGP-n-NA [00287] CDUQU-n-F [00288] CLUQU-n-F [00289] CLUQU(1)-n-F [00290] CLP-V-n [00291] CDU-n-F [00292] DCU-n-F [00293] CGG-n-F [00294] CPZG-n-OT [00295] CC-nV-Vm [00296] CCP-Vn-m [00297] CCG-V-F [00298] CCP-nV-m [00299] CC-n-V [00300] CCC-n-m [00301] CCC-n-V [00302] CCQU-n-F [00303] CC-n-Vm [00304] CLUQU-n-F [00305] CPPC-nV-Vm [00306] CCQG-n-F [00307] CQU-n-F [00308] CP-1V-m [00309] CLP-n-T [00310] CLP-n-OT [00311] CP-2V-m [00312] CP-V2-m [00313] Dec-U-n-F [00314] CWCU-n-F [00315] CPGP-n-m [00316] CWCG-n-F [00317] CLU-n-F [00318] CLU-n-F(1) [00319] CCOC-n-m [00320] CPTU-n-F [00321] GPTU-n-F [00322] PQU-n-F [00323] PUQU-n-F [00324] PGU-n-F [00325] CGZP-n-OT [00326] CCGU-n-F [00327] CCQG-n-F [00328] DPGU-n-F [00329] DPGU-n-OT [00330] CUQU-n-F [00331] CCCQU-n-F [00332] CGUQU-n-F [00333] CPGU-n-OT [00334] PYP-nF [00335] CPGU-n-F [00336] CCVC-n-m [00337] CCVC-n-V [00338] CCVC-n-IV [00339] CVCP-1V-OT [00340] GGP-n-Cl [00341] DLGU-n-F [00342] DLGU-n-m [00343] PP-nV-Vm [00344] PP-1-nVm [00345] CWCQU-n-F [00346] PPGU-n-F [00347] PPGU-(c5)-F [00348] PGUQU-n-F [00349] PGUQU-(c5)-F [00350] PGUQU(1)-n-F [00351] GPQU-n-F [00352] MPP-n-F [00353] MUQU-n-F [00354] NUQU-n-F [00355] PGP-n-kVm [00356] PP-n-kVm [00357] PCH-nCl [00358] GP-n-Cl [00359] GGP-n-F [00360] PGIGI-n-F [00361] PGU-n-OXF [00362] CPU-n-OXF [00363] PUS-n-m [00364] PGS-n-m [00365] PGS(1)-n-m [00366] PGS(1)-n-Om [00367] PUS(1)-n-m [00368] PUS(1)-n-Om [00369] PUS-n-Om [00370] PGS-n-Om [00371] PUS-(c5)-m [00372] PGS-(c5)-m [00373] PUS(1)-(c5)-m [00374] PGS(1)-(c5)-m [00375] CCQU-n-F(1) [00376] DUQU-n-F(1) [00377] PUQU-n-F(1) [00378] APUQU-n-F(1) [00379] CDUQU-n-F(1) [00380] CPPQU-n-F(1) [00381] DGUQU-n-F(1) [00382] DPUQU-n-F(1) [00383] PGUQU-n-F(1) [00384] PYP-n-m

[0577] Particular preference is given to LC media which, besides the compounds of the Formulae I, an antioxidant and a light stabilizer comprise at least one, two, three, four or more compounds from Table E.

TABLE-US-00006 TABLE F Table F indicates possible dopants which are generally added to the LC media according to the invention. The LC media preferably comprise 0-10% by weight, in particular 0.01-5% by weight and particularly preferably 0.01-3% by weight of dopants. [00385] C 15 [00386] CB 15 [00387] CM 21 [00388] R/S-811 [00389] CM 44 [00390] CM 45 [00391] CM 47 [00392] CN [00393] R/S-2011 [00394] R/S-3011 [00395] R/S-4011 [00396] R/S-5011 [00397] R/S-1011

TABLE-US-00007 TABLE G Antioxidants and light stabilizers, which can additionally be added, for example, to the LC media according to the invention in amounts of 0 to 10% by weight, are mentioned below. [00398] [00399] [00400] [00401] .sub.n = 1, 2, 3, 4, 5, 6 or 7 [00402] .sub.n = 1, 2, 3, 4, 5, 6 or 7 [00403] [00404] .sub.n = 1, 2, 3, 4, 5, 6 or 7 [00405] .sub.q = 1, 2, 3, 4, 5, 6 or 7 [00406] [00407] [00408] [00409] [00410] [00411] [00412] [00413] [00414] [00415] [00416] [00417] [00418] [00419] [00420] [00421] [00422] [00423] [00424] [00425] [00426] [00427] [00428] [00429] [00430] [00431] [00432] [00433] .sub.q = 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10

TABLE-US-00008 TABLE H Table H shows illustrative reactive mesogenic compounds (RMs) which can be used in the LC media in accordance with the present invention. [00434] RM-1 [00435] RM-2 [00436] RM-3 [00437] RM-4 [00438] RM-5 [00439] RM-6 [00440] RM-7 [00441] RM-8 [00442] RM-9 [00443] RM-10 [00444] RM-11 [00445] RM-12 [00446] RM-13 [00447] RM-14 [00448] RM-15 [00449] RM-16 [00450] RM-17 [00451] RM-18 [00452] RM-19 [00453] RM-20 [00454] RM-21 [00455] RM-22 [00456] RM-23 [00457] RM-24 [00458] RM-25 [00459] RM-26 [00460] RM-27 [00461] RM-28 [00462] RM-29 [00463] RM-30 [00464] RM-31 [00465] RM-32 [00466] RM-33 [00467] RM-34 [00468] RM-35 [00469] RM-36 [00470] RM-37 [00471] RM-38 [00472] RM-39 [00473] RM-40 [00474] RM-41 [00475] RM-42 [00476] RM-43 [00477] RM-44 [00478] RM-45 [00479] RM-46 [00480] RM-47 [00481] RM-48 [00482] RM-49 [00483] RM-50 [00484] RM-51 [00485] RM-52 [00486] RM-53 [00487] RM-54 [00488] RM-55 [00489] RM-56 [00490] RM-57 [00491] RM-58 [00492] RM-59 [00493] RM-60 [00494] RM-61 [00495] RM-62 [00496] RM-63 [00497] RM-64 [00498] RM-65 [00499] RM-66 [00500] RM-67 [00501] RM-68 [00502] RM-69 [00503] RM-70 [00504] RM-71 [00505] RM-72 [00506] RM-73 [00507] RM-74 [00508] RM-75 [00509] RM-76 [00510] RM-77 [00511] RM-78 [00512] RM-79 [00513] RM-80 [00514] RM-81 [00515] RM-82 [00516] RM-83 [00517] RM-84 [00518] RM-85 [00519] RM-86 [00520] RM-87 [00521] RM-88 [00522] RM-89 [00523] RM-90 [00524] RM-91 [00525] RM-92 [00526] RM-93 [00527] RM-94 [00528] RM-95 [00529] RM-96 [00530] RM-97 [00531] RM-98 [00532] RM-99 [00533] RM-100 [00534] RM-101 [00535] RM-102 [00536] RM-103 [00537] RM-104 [00538] RM-105 [00539] RM-106 [00540] RM-107 [00541] RM-108 [00542] RM-109 [00543] RM-110 [00544] RM-111 [00545] RM-112 [00546] RM-113 [00547] RM-114 [00548] RM-115 [00549] RM-116 [00550] RM-117 [00551] RM-118 [00552] RM-119 [00553] RM-120 [00554] RM-121 [00555] RM-122 [00556] RM-123 [00557] RM-124 [00558] RM-125 [00559] RM-126 [00560] RM-127 [00561] RM-128 [00562] RM-129 [00563] RM-130 [00564] RM-131 [00565] RM-132 [00566] RM-133 [00567] RM-134 [00568] RM-135 [00569] RM-136 [00570] RM-137 [00571] RM-138 [00572] RM-139 [00573] RM-140 [00574] RM-141 [00575] RM-142 [00576] RM-143 [00577] RM-144 [00578] RM-145 [00579] RM-146 [00580] RM-147 [00581] RM-148 [00582] RM-149 [00583] RM-150 [00584] RM-151 [00585] RM-152 [00586] RM-153 [00587] RM-154 [00588] RM-155 [00589] RM-156 [00590] RM-157 [00591] RM-158 [00592] RM-159 [00593] RM-160 [00594] RM-161 [00595] RM-162 [00596] RM-163 [00597] RM-164 [00598] RM-165 [00599] RM-166 [00600] RM-167 [00601] RM-168 [00602] RM-169 [00603] RM-170 [00604] RM-171 [00605] RM-172 [00606] RM-173 [00607] RM-174 [00608] RM-175 [00609] RM-176 [00610] RM-177 [00611] RM-178 [00612] RM-179 [00613] RM-180 [00614] RM-181 [00615] RM-182 [00616] RM-183 [00617] RM-184 The LC media according to the invention may optionally comprise one or more polymerizable compounds, preferably selected from the polymerizable compounds of the Formulae RM-1 to RM-184. Of these, compounds RM-1, RM-4, RM-8, RM-17, RM-19, RM-35, RM-37, RM-39, RM-40, RM-41, RM-48, RM-52, RM-54, RM-57, RM-58, RM-64, RM-74, RM-76, RM-88, RM-91, RM-102, RM-103, RM-109, RM-116, RM-117, RM-120, RM-121, RM-122, RM-139, RM-140, RM-142, RM-143, RM-145, RM-146, RM-147, RM-149, RM-156 to RM-163, RM-169, RM-170 and RM-171 to RM-184 are particularly preferred.

TABLE-US-00009 TABLE I Table I shows self-alignment additives for vertical alignment which can be used in LC media for SA-FFS, SA-HB-FFS and SA-XB-FFS displays according to the present invention: [00618] SA-1 [00619] SA-2 [00620] SA-3 [00621] SA-4 [00622] SA-5 [00623] SA-6 [00624] SA-7 [00625] SA-8 [00626] SA-9 [00627] SA-10 [00628] SA-11 [00629] SA-12 [00630] SA-13 [00631] SA-14 [00632] SA-15 [00633] SA-16 [00634] SA-17 [00635] SA-18 [00636] SA-19 [00637] SA-20 [00638] SA-21 [00639] SA-22 [00640] SA-23 [00641] SA-24 [00642] SA-25 [00643] SA-26 [00644] SA-27 [00645] SA-28 [00646] SA-29 [00647] SA-30 [00648] SA-31 [00649] SA-32 [00650] SA-33 [00651] SA-34 [00652] SA-35 [00653] SA-36 [00654] SA-37 [00655] SA-38 [00656] SA-39 [00657] SA-40 [00658] SA-41 [00659] SA-42 [00660] SA-43 [00661] SA-44 [00662] SA-45 [00663] SA-46 [00664] SA-47 [00665] SA-48 [00666] SA-49

[0578] In a preferred embodiment, the LC media, SA-VA and SA-FFS displays according to the present invention comprise one or more SA additives selected from the Formulae SA-1 to SA-49, preferably from the Formulae SA-14 to SA-49, very preferably from the Formulae SA-20 to SA-34 and SA-44, in combination with one or more RMs.

[0579] The following examples are intended to explain the invention without limiting it.

[0580] Above and below, percentage data denote percent by weight. All temperatures are indicated in degrees Celsius. m.p. denotes melting point, cl.p.=clearing point. Furthermore, C=crystalline state, N=nematic phase, S=smectic phase and I=isotropic phase. The data between these symbols represent the transition temperatures. Furthermore, the following symbols are used

TABLE-US-00010 V.sub.0 Freedericks threshold voltage, capacitive [V] at 20 C., V.sub.10 voltage [V] for 10% transmission, n.sub.e extraordinary refractive index measured at 20 C. and 589 nm, n.sub.0 ordinary refractive index measured at 20 C. and 589 nm, n optical anisotropy measured at 20 C. and 589 nm, .sub. dielectric susceptibility (or dielectric constant) perpendicular to the to the longitudinal axes of the molecules at 20 C. and 1 kHz, .sub. dielectric susceptibility (or dielectric constant) parallel to the to the longitudinal axes of the molecules at 20 C. and 1 kHz, dielectric anisotropy at 20 C. and 1 kHz, cl. p. or clearing point [ C.], T(N, I) flow viscosity measured at 20 C. [mm.sup.2 .Math. s.sup.1], .sub.1 rotational viscosity measured at 20 C. [mPa .Math. s], K.sub.1 elastic constant, splay deformation at 20 C. [pN], K.sub.2 elastic constant, twist deformation at 20 C. [pN], K.sub.3 elastic constant, bend deformation at 20 C. [pN], and VHR voltage holding ratio.

[0581] All physical properties are determined in accordance with Merck Liquid Crystals, Physical Properties of Liquid Crystals, status November 1997, Merck KGaA, Germany, and apply for a temperature of 20 C., unless explicitly indicated otherwise.

EXAMPLES

Example M1

[0582] A nematic LC medium is formulated as follows:

TABLE-US-00011 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 6.0 T(N, I) = 80.7 C. 2 CC-3-V 41.0 n (589 nm, 20 C.): = 0.1121 3 CC-3-V1 6.0 .sub. (1 kHz, 20 C.): = 10.1 4 CCP-3-1 5.0 .sub. (1 kHz, 20 C.): = 3.3 5 CLU-3-F 10.0 (1 kHz, 20 C.): = 6.8 6 PGP-2-3 5.0 .sub.1 (20 C.): = 61 mPa .Math. s 7 PGP-2-4 2.0 K.sub.1 (20 C.): = 13.2 pN 8 PGUQU-3-F 5.0 K.sub.3 (20 C.): = 13.5 pN 9 PGUQU-4-F 6.0 V.sub.0 (20 C.): = 1.47 V 10 PGUQU-5-F 4.5 11 PPGU-3-F 1.0 12 PUQU-3-F 6.0 13 CCP-3-3 2.5

Mixture Example S1 (Stabilised with Compounds of Formulae ST-2-3 and H-3-3)

[0583] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00012 Mixture M1 99.935 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-3 150 ppm [00667]ST-2-3 [00668]H-3-3

Example M2

[0584] A nematic L.sup.9 medium is formulated as follows:

TABLE-US-00013 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 9.0 T(N, I) = 78.8 C. 2 CC-3-V 39.5 n (589 nm, 20 C.): = 0.1141 3 CC-3-V1 6.5 .sub. (1 kHz, 20 C.): = 10.2 4 CCP-3-1 5.0 .sub. (1 kHz, 20 C.): = 3.1 5 CLU-3-F 9.5 (1 kHz, 20 C.): = 7.2 6 PGP-2-3 2.5 .sub.1 (20 C.): = 64 mPa .Math. s 7 PGP-2-4 5.0 K.sub.1 (20 C.): = 13.7 pN 8 PGUQU-3-F 5.0 K.sub.3 (20 C.): = 13.6 pN 9 PGUQU-4-F 5.0 V.sub.0 (20 C.): = 1.46 V 10 PGUQU-5-F 3.5 11 PPGU-3-F 1.0 12 PUQU-3-F 8.5

Mixture Example S.SUP.2 .(Stabilised with Compounds of Formulae ST-2-3 and H-3-3)

[0585] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00014 Mixture M2 99.935 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-3 150 ppm

Example M3

[0586] A nematic LC medium is formulated as follows:

TABLE-US-00015 Composition Conc., Nr. Comp. wt.-% Properties 1 APUQU-3-F 5.5 T(N, I) = 76.3 C. 2 CC-3-V 35.0 n (589 nm, 20 C.): = 0.1097 3 CC-3-V1 4.5 .sub. (1 kHz, 20 C.): = 15.2 4 CCP-3-1 7.0 .sub. (1 kHz, 20 C.): = 3.5 5 CCP-30CF3 5.5 (1 kHz, 20 C.): = 11.7 6 CLP-3-T 1.0 .sub.1 (20 C.): = 76 mPa .Math. s 7 CLU-3-F 11.0 K.sub.1 (20 C.): = 12.2 pN 8 PGU-2-F 5.0 K.sub.3 (20 C.): = 13.1 pN 9 PGU-3-F 1.0 V.sub.0 (20 C.): = 1.07 V 10 PGUQU-3-F 5.5 11 PGUQU-4-F 7.5 12 PGUQU-5-F 2.5 13 PPGU-3-F 1.0 14 PUQU-3-F 8.0

Mixture Example S3 (Stabilised with Compounds of Formula ST-2-3)

[0587] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00016 Mixture M3 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Mixture Example S3a (Stabilised with Compounds of Formula ST-1-8)

[0588] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00017 Mixture M3 99.95 wt.- % Compound of Formula ST-1-8 500 ppm [00669]ST-1-8

Example M4

[0589] A nematic LC medium is formulated as follows:

TABLE-US-00018 Composition Conc., Nr. Comp. wt.-% Properties 1 CC-3-2V1 4.0 T(N, I) = 93.3 C. 2 CC-3-V 30.0 n (589 nm, 20 C.): = 0.1120 3 CC-3-V1 8.0 .sub. (1 kHz, 20 C.): = 2.9 4 CCP-3-1 5.0 .sub. (1 kHz, 20 C.): = 6.3 5 CCP-30CF3 3.0 (1 kHz, 20 C.): = 6.8 6 CCP-V2-1 3.0 .sub.1 (20 C.): = 76 mPa .Math. s 7 CDUQU-3-F 6.0 K.sub.1 (20 C.): = 18.5 pN 8 CLP-3-T 5.0 K.sub.3 (20 C.): = 17.7 pN 9 CLP-V-1 5.0 V.sub.0 (20 C.): = 1.81 V 10 CLU-3-F 5.0 11 DGUQU-4-F 5.0 12 DLGU-3-F 2.0 13 DPGU-4-F 3.0 14 PGP-2-2V 6.0 15 PP-1-2V1 8.5 16 PGUQU-3-F 1.5

Mixture Example S4 (Stabilised with Compounds of Formulae ST-2-3 and H-3-11)

[0590] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00019 Mixture M4 99.955 wt.-% Compound of Formula ST-2-3 400 ppm Compound of Formula H-3-11 50 ppm [00670]H-3-11

Example M5

[0591] A nematic LC medium is formulated as follows:

TABLE-US-00020 Composition Conc., Nr. Comp. wt.-% Properties 1 CC-3-2V1 4.0 T(N, I) = 93.2 C. 2 CC-3-V 30.0 n (589 nm, 20 C.): = 0.1096 3 CC-3-V1 8.0 .sub. (1 kHz, 20 C.): = 9.6 4 CCP-3-1 5.0 .sub. (1 kHz, 20 C.): = 3.0 5 CCP-30CF3 3.0 (1 kHz, 20 C.): = 6.7 6 CCP-V2-1 3.0 .sub.1 (20 C.): = 79 mPa .Math. s 7 CDUQU-3-F 6.0 K.sub.1 (20 C.): = 18.7 pN 8 CLP-3-T 5.0 K.sub.3 (20 C.): = 18.1 pN 9 CLP-V-1 5.0 V.sub.0 (20 C.): = 1.77 V 10 CLU-3-F 5.0 11 DGUQU-4-F 5.0 12 DLGU-3-F 2.0 13 DPGU-4-F 3.0 14 PGP-2-2V 5.0 15 PP-1-2V1 8.5 16 APUQU-3-F 2.5

Mixture Example S5 (Stabilised with Compounds of Formulae ST-2-3 and H-3-11)

[0592] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00021 Mixture M5 99.955 wt.-% Compound of Formula ST-2-3 400 ppm Compound of Formula H-3-11 50 ppm

Example M6

[0593] A nematic LC medium is formulated as follows:

TABLE-US-00022 Composition Conc., Nr. Comp. wt.-% Properties 1 CC-3-2V1 4.0 T(N, I) = 93.1 C. 2 CC-3-V 30.0 n (589 nm, 20 C.): = 0.1092 3 CC-3-V1 8.0 .sub. (1 kHz, 20 C.): = 9.8 4 CCP-3-1 5.0 .sub. (1 kHz, 20 C.): = 2.9 5 CCP-30CF3 3.0 (1 kHz, 20 C.): = 6.9 6 CCP-V2-1 3.0 .sub.1 (20 C.): = 81 mPa .Math. s 7 CDUQU-3-F 7.5 K.sub.1 (20 C.): = 18.6 pN 8 CLP-3-T 5.0 K.sub.3 (20 C.): = 18.1 pN 9 CLP-V-1 5.0 V.sub.0 (20 C.): = 1.74 V 10 CLU-3-F 5.0 11 DGUQU-4-F 5.0 12 DLGU-3-F 2.0 13 DPGU-4-F 3.0 14 PGP-2-2V 4.5 15 PGUQU-3-F 1.5 16 PP-1-2V1 8.5

Mixture Example S6 (Stabilised with Compounds of Formulae ST-2-3 and H-3-11)

[0594] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00023 Mixture M6 99.955 wt.-% Compound of Formula ST-2-3 400 ppm Compound of Formula H-3-11 50 ppm

Example M7

[0595] A nematic LC medium is formulated as follows:

TABLE-US-00024 Composition Conc., Nr. Comp. wt.-% Properties 1 APUQU-3-F 4.9 T(N, I) = 106 C. 2 CC-3-2V1 2.0 n (589 nm, 20 C.):= 3 CC-3-V 22.5 .sub. (1 kHz, 20 C.):= 4 CC-3-V1 7.4 .sub. (1 kHz, 20 C.):= 5 CCP-V-1 15.0 (1 kHz, 20 C.):= 6 CCP-V2-1 6.6 .sub.1 (20 C.): = mPa .Math. s 7 CCVC-3-V 4.2 K.sub.1 (20 C.): = pN 8 CDUQU-3-F 10.0 K.sub.3 (20 C.): = pN 9 CLP-V-1 6.0 V.sub.0 (20 C.): = V 10 PCH-302 3.0 11 PGP-1-2V 6.0 12 PGP-3-2V 3.9 13 PP-1-2V1 8.5

Mixture Example S7 (Stabilised with Compounds of Formula ST-1-3)

[0596] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00025 Mixture M7 99.97 wt.-% Compound of Formula ST-1-3 300 ppm [00671]ST-1-3

Example M8

[0597] A nematic LC medium is formulated as follows:

TABLE-US-00026 Composition Conc., Nr. Comp. wt.-% Properties 1 APUQU-3-F 5.0 T(N, I) = C. 2 BCH-32 6.0 n (589 nm, 20 C.):= 3 BCH-3F.F 1.0 .sub. (1 kHz, 20 C.):= 4 CC-3-V 48.0 .sub. (1 kHz, 20 C.):= 5 CCP-V-1 14.0 (1 kHz, 20 C.):= 6 PGU-2-F 2.3 .sub.1 (20 C.): = mPa .Math. s 7 PGUQU-3-F 4.6 K.sub.1 (20 C.): = pN 8 PGUQU-4-F 2.1 K.sub.3 (20 C.): = pN 9 PP-1-2V1 2.5 V.sub.0 (20 C.): = V 10 PUQU-3-F 7.5 11 PYP-2-3 4.0 12 CLU-3-F 3.0

Mixture Example S8 (Stabilised with Compounds of Formula ST-1-3)

[0598] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00027 Mixture M8 99.97 wt.-% Compound of Formula ST-1-3 300 ppm

Example M9

[0599] A nematic LC medium is formulated as follows:

TABLE-US-00028 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-3F.F 2.5 T(N, I) = C. 2 CC-3-V 50.0 n (589 nm, 20 C.):= 3 CCP-V-1 14.0 .sub. (1 kHz, 20 C.):= 4 CLU-3-F 9.5 .sub. (1 kHz, 20 C.):= 5 PGU-2-F 6.0 (1 kHz, 20 C.):= 6 PGUQU-3-F 6.0 .sub.1 (20 C.): = mPa .Math. s 7 PGUQU-4-F 6.0 K.sub.1 (20 C.): = pN 8 PP-1-2V1 1.5 K.sub.3 (20 C.): = pN 9 PYP-2-3 4.5 V.sub.0 (20 C.): = V

Mixture Example S9 (Stabilised with Compounds of Formula ST-1-3)

[0600] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00029 Mixture M9 99.97 wt.-% Compound of Formula ST-1-3 300 ppm

Example M10

[0601] A nematic LC medium is formulated as follows:

TABLE-US-00030 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 8.5 T(N, I) = C. 2 BCH-3F.F 8.0 n (589 nm, 20 C.):= 3 CC-3-V 49.0 .sub. (1 kHz, 20 C.):= 4 CCP-V-1 2.5 .sub. (1 kHz, 20 C.):= 5 CLU-3-F 13.0 (1 kHz, 20 C.):= 6 PGU-2-F 1.0 .sub.1 (20 C.): = mPa .Math. s 7 PGUQU-3-F 6.5 K.sub.1 (20 C.): = pN 8 PGUQU-4-F 6.5 K.sub.3 (20 C.): = pN 9 PP-1-2V1 3.0 V.sub.0 (20 C.): = V 10 PYP-2-3 2.0

Mixture Example S10 (Stabilised with Compounds of Formula ST-1-3)

[0602] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00031 Mixture M10 99.97 wt.-% Compound of Formula ST-1-3 300 ppm

Example M11

[0603] A nematic LC medium is formulated as follows:

TABLE-US-00032 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-3F.F 5.0 T(N, I) = 81 C. 2 CC-3-V 48.5 n (589 nm, 20 C.):= 3 CCP-3-1 10.5 .sub. (1 kHz, 20 C.): = 5.9 4 CLU-3-F 10.0 .sub. (1 kHz, 20 C.): = 3.5 5 CPY-2-O2 7.0 (1 kHz, 20 C.): = 2.5 6 CPY-3-O2 7.5 .sub.1 (20 C.): = 67 mPa .Math. s 7 PGUQU-3-F 6.0 K.sub.1 (20 C.): = 14.2 pN 8 PP-1-2V1 5.5 K.sub.3 (20 C.): = 15.5 pN V.sub.0 (20 C.): = 2.54 V

Mixture Example S11 (Stabilised with Compounds of Formulae ST-2-3 and H-3-3)

[0604] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00033 Mixture M11 99.92 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-3 300 ppm

Example M12

[0605] A nematic LC medium is formulated as follows:

TABLE-US-00034 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 3.5 T(N, I) = 80 C. 2 BCH-3F.F 6.0 n (589 nm, 20 C.):= 3 CC-3-V 49.0 .sub. (1 kHz, 20 C.): = 6.4 4 CCP-3-1 4.5 .sub. (1 kHz, 20 C.): = 3.6 5 CLU-3-F 10.0 (1 kHz, 20 C.): = 2.7 6 CPY-2-O2 5.5 .sub.1 (20 C.): = 66 mPa .Math. s 7 CPY-3-O2 10.0 K.sub.1 (20 C.): = 13.7 pN 8 PCH-302 1.5 K.sub.3 (20 C.): = 14.8 pN 9 PGUQU-3-F 5.5 V.sub.0 (20 C.): = 2.37 V 10 PGUQU-4-F 1.5 LTS bulk (20 C.): 1000 h 11 PP-1-2V1 3.0

Mixture Example S12 (Stabilised with Compounds of Formulae ST-2-3 and H-3-3)

[0606] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00035 Mixture M12 99.92 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-3 300 ppm

Example M13

[0607] A nematic LC medium is formulated as follows:

TABLE-US-00036 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 9.0 T(N, I) = 78.8 C. 2 CC-3-V 39.5 n (589 nm, 20 C.): = 0.1141 3 CC-3-V1 6.5 .sub. (1 kHz, 20 C.): = 10.2 4 CCP-3-1 5.0 .sub. (1 kHz, 20 C.): = 3.1 5 CLU-3-F 9.5 (1 kHz, 20 C.): = 7.2 6 PGP-2-3 2.5 .sub.1 (20 C.): = 64 mPa .Math. s 7 PGP-2-4 5.0 K.sub.1 (20 C.): = 13.7 pN 8 PGUQU-3-F 5.0 K.sub.3 (20 C.): = 14.6 pN 9 PGUQU-4-F 5.0 V.sub.0 (20 C.): = 1.46 V 10 PGUQU-5-F 3.5 11 PPGU-3-F 1.0 12 PUQU-3-F 8.5

Mixture Example S13 (Stabilised with Compounds of Formulae ST-2-3 and H-3-3)

[0608] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00037 Mixture M13 99.935 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-3 150 ppm

Mixture Example S13a (Stabilised with Compound of Formula ST-2-3)

[0609] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00038 Mixture M13 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Example M14

[0610] A nematic LC medium is formulated as follows:

TABLE-US-00039 Composition Conc., Nr. Comp. wt.-% Properties 1 CC-3-V 41.5 T(N, I) = 79.5 C. 2 PUQU-3-F 6.0 n (589 nm, 20 C.): = 0.1145 3 CCP-V-1 5.0 .sub. (1 kHz, 20 C.): = 10.2 4 CLU-3-F 15.0 .sub. (1 kHz, 20 C.): = 3.1 5 CCP-3-1 2.5 (1 kHz, 20 C.): = 7.1 6 BCH-32 5.0 .sub.1 (20 C.): = 68 mPa .Math. s 7 PGP-2-3 5.0 K.sub.1 (20 C.): = 13.6 pN 8 PGP-2-4 5.0 K.sub.3 (20 C.): = 13.6 pN 9 APUQU-3-F 4.0 V.sub.0 (20 C.): = 1.46 V 10 PGUQU-3-F 5.0 11 PGUQU-4-F 4.0 12 PPGU-3-F 1.0 13 PP-1-2V1 1.0

Mixture Example S14 (Stabilised with Compounds of Formulae ST-2-3 and H-3-3)

[0611] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00040 Mixture M14 99.935 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-3 150 ppm

Example M15

[0612] A nematic LC medium is formulated as follows:

TABLE-US-00041 Composition Conc., Nr. Comp. wt.-% Properties 1 CC-3-V 41.5 T (N, I) = 80.0 C. 2 PUQU-3-F(1) 6.0 n (589 nm, 20 C.): = 0.1117 3 CCP-V-1 5.0 .sub. (1 kHz, 20 C.): = 10.1 4 CLU-3-F 15.0 .sub. (1 kHz, 20 C.): = 3.1 5 CCP-3-1 2.5 (1 kHz, 20 C.): = 7.0 6 BCH-32 5.0 .sub.1 (20 C.): = 77 mPa .Math. s 7 PGP-2-3 5.0 K.sub.1 (20 C.): = 13.4 pN 8 PGP-2-4 5.0 K.sub.3 (20 C.): = 13.8 pN 9 APUQU-3-F(1) 4.0 V.sub.0 (20 C.): = 1.49 V 10 PGUQU-3-F(1) 5.0 11 PGUQU-4-F(1) 4.0 12 PPGU-3-F 1.0 13 PP-1-2V1 1.0 [00672]APUQU-3-F(1) [00673]PGUQU-3-F(1) [00674]PGUQU-4-F(1)

Mixture Example S15 (Stabilised with Compounds of Formulae ST-2-3 and H-3-3)

[0613] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00042 Mixture M15 99.935 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-3 150 ppm

Example M16

[0614] A nematic LC medium is formulated as follows:

TABLE-US-00043 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 5.0 T(N, I) = 81.4 C. 2 BCH-3F.F 6.0 n (589 nm, 20 C.): = 0.0998 3 CC-3-V 45.0 .sub. (1 kHz, 20 C.): = 6.4 4 CCH-23 4.0 .sub. (1 kHz, 20 C.): = 3.5 5 CCP-3-1 10.0 (1 kHz, 20 C.): = 2.9 6 CLU-3-F 5.0 .sub.1 (20 C.): = 67 mPa .Math. s 7 CPY-2-O2 10.0 K.sub.1 (20 C.): = 13.8 pN 8 CPY-3-O2 2.5 K.sub.3 (20 C.): = 14.5 pN 9 PGUQU-3-F 6.0 V.sub.0 (20 C.): = 2.30 V 10 PUQU-3-F 4.0 LTS bulk (20 C.): = 1000 h 11 PYP-2-3 2.5

Mixture Example S16 (Stabilised with Compounds of Formulae ST-2-3 and H-3-3)

[0615] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00044 Mixture M16 99.92 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-3 300 ppm

Example M17

[0616] A nematic LC medium is formulated as follows:

TABLE-US-00045 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 5.0 T(N, I) = 81.3 C. 2 BCH-3F.F 5.0 n (589 nm, 20 C.): = 0.0993 3 CC-3-V 45.0 .sub. (1 kHz, 20 C.): = 6.5 4 CCH-23 1.5 .sub. (1 kHz, 20 C.): = 3.5 5 CCP-3-1 10.0 (1 kHz, 20 C.): = 3.0 6 CLU-3-F 10.0 .sub.1 (20 C.): = 67 mPa .Math. s 7 CPY-2-O2 10.0 K.sub.1 (20 C.): = 13.8 pN 8 CPY-3-O2 2.0 K.sub.3 (20 C.): = 14.4 pN 9 PGUQU-3-F 3.5 V.sub.0 (20 C.): = 2.27 V 10 PUQU-3-F 5.0 LTS bulk (20 C.): = 1000 h 11 PYP-2-3 3.0

Mixture Example S17 (Stabilised with Compounds of Formulae ST-2-3 and H-3-3)

[0617] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00046 Mixture M17 99.92 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-3 300 ppm

Example M18

[0618] A nematic LC medium is formulated as follows:

TABLE-US-00047 Composition Conc., Nr. Comp. wt.-% Properties 1 CC-3-V 42.0 T(N, I) = 79.4 C. 2 CC-3-V1 5.0 n (589 nm, 20 C.): = 0.1121 3 CCP-V-1 4.5 .sub. (1 kHz, 20 C.): = 10.3 4 CLU-3-F 10.5 .sub. (1 kHz, 20 C.): = 3.2 5 CPGU-3-OT 5.0 (1 kHz, 20 C.): = 7.1 6 APUQU-2-F 5.0 .sub.1 (20 C.): = 66 mPa .Math. s 7 APUQU-3-F 7.5 K.sub.1 (20 C.): = 13.5 pN 8 PGP-2-3 6.0 K.sub.3 (20 C.): = 13.6 pN 9 PGP-2-4 8.0 V.sub.0 (20 C.): = 1.46 V 10 PPGU-3-F 0.5 11 PUQU-3-F 6.0

Mixture Example S18 (Stabilised with Compound of Formula ST-2-3)

[0619] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00048 Mixture M18 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Example M19

[0620] A nematic LC medium is formulated as follows:

TABLE-US-00049 Composition Conc., Nr. Comp. wt.-% Properties 1 CC-3-V 42.0 T (N, I) = 79.6 C. 2 CC-3-V1 5.0 n (589 nm, 20 C.): = 0.1095 3 CCP-V-1 4.5 .sub. (1 kHz, 20 C.): = 10.2 4 CLU-3-F 10.5 .sub. (1 kHz, 20 C.): = 3.2 5 CPGU-3-OT 5.0 (1 kHz, 20 C.): = 7.0 6 APUQU-2-F(1) 5.0 .sub.1 (20 C.): = 75 mPa .Math. s 7 APUQU-3-F(1) 7.5 K.sub.1 (20 C.): = 13.4 pN 8 PGP-2-3 6.0 K.sub.3 (20 C.): = 13.7 pN 9 PGP-2-4 8.0 V.sub.0 (20 C.): = 1.47 V 10 PPGU-3-F 0.5 11 PUQU-3-F(1) 6.0 [00675]

Mixture Example S19 (Stabilised with Compound of Formula ST-2-3)

[0621] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00050 Mixture M19 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Example M20

[0622] A nematic LC medium is formulated as follows:

TABLE-US-00051 Composition Conc., Nr. Comp. wt.-% Properties 1 CC-3-V 40.5 T(N, I) = 78.8 C. 2 CC-3-V1 2.0 n (589 nm, 20 C.): = 0.1122 3 PUQU-3-F 7.0 .sub. (1 kHz, 20 C.): = 10.3 4 CCP-V-1 6.0 .sub. (1 kHz, 20 C.): = 3.1 5 CLU-3-F 15.0 (1 kHz, 20 C.): = 7.2 6 CCP-3-1 3.0 .sub.1 (20 C.): = 67 mPa .Math. s 7 BCH-32 4.0 K.sub.1 (20 C.): = 13.1 pN 8 PGP-2-3 4.0 K.sub.3 (20 C.): = 13.8 pN 9 PGP-2-4 5.0 V.sub.0 (20 C.): = 1.42 V 10 PGUQU-3-F 5.0 11 PGUQU-4-F 5.0 12 PGUQU-5-F 3.0 13 PPGU-3-F 0.5

Mixture Example S20 (Stabilised with Compound of Formula ST-2-3)

[0623] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00052 Mixture M20 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Example M21

[0624] A nematic LC medium is formulated as follows:

TABLE-US-00053 Composition Conc., Nr. Comp. wt.-% Properties 1 CC-3-V 40.5 T(N, I) = 78.5 C. 2 CCP-3-1 5.0 n (589 nm, 20 C.): = 0.1112 3 CC-3-V1 8.0 .sub. (1 kHz, 20 C.): = 10.3 4 CCP-V-1 2.0 .sub. (1 kHz, 20 C.): = 3.1 5 CCPC-33 2.0 (1 kHz, 20 C.): = 7.1 6 CLU-3-F 10.0 .sub.1 (20 C.): = 67 mPa .Math. s 7 PGU-2-F 5.5 K.sub.1 (20 C.): = 13.2 pN 8 PGUQU-3-F 7.0 K.sub.3 (20 C.): = 13.9 pN 9 PGUQU-4-F 7.0 V.sub.0 (20 C.): = 1.44 V 10 PUQU-3-F 4.0 11 PGP-2-3 3.0 12 PGP-2-4 6.0

Mixture Example S21 (Stabilised with Compound of Formula ST-2-3)

[0625] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00054 Mixture M21 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Example M22

[0626] A nematic LC medium is formulated as follows:

TABLE-US-00055 Composition Conc., Nr. Comp. wt.-% Properties 1 APUQU-3-F 2.5 T(N, I) = 85.3 C. 2 CC-3-V 32.0 n (589 nm, 20 C.): = 0.1135 3 CC-3-V1 9.0 .sub. (1 kHz, 20 C.): = 11.1 4 CCP-30CF3 2.0 .sub. (1 kHz, 20 C.): = 2.9 5 CLP-3-T 10.0 (1 kHz, 20 C.): = 8.2 6 CLP-V-1 8.0 .sub.1 (20 C.): = 82 mPa .Math. s 7 CLU-3-F 13.0 K.sub.1 (20 C.): = 17.1 pN 8 PGUQU-3-F 7.0 K.sub.3 (20 C.): = 17.4 pN 9 PGUQU-4-F 5.0 V.sub.0 (20 C.): = 1.53 V 10 PGUQU-5-F 4.0 11 PP-1-2V1 7.0 12 PPGU-3-F 0.5

Mixture Example S22 (Stabilised with Compounds of Formulae ST-2-3 and H-3-3)

[0627] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00056 Mixture M22 99.935 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-3 150 ppm

Example M23

[0628] A nematic LC medium is formulated as follows:

TABLE-US-00057 Composition Conc., Nr. Comp. wt.-% Properties 1 CC-3-V 36.0 T(N, I) = 78.4 C. 2 PP-1-2V1 12.0 n (589 nm, 20 C.): = 0.1134 3 CC-3-V1 10.0 .sub. (1 kHz, 20 C.): = 6.5 4 CLU-3-F 11.0 .sub. (1 kHz, 20 C.): = 2.7 5 CLP-3-T 6.0 (1 kHz, 20 C.): = 3.9 6 CCP-30CF3 5.0 .sub.1 (20 C.): = 56 mPa .Math. s 7 CLP-V-1 5.0 K.sub.1 (20 C.): = 17.0 pN 8 PGP-2-2V 9.0 K.sub.3 (20 C.): = 15.9 pN 9 PGUQU-3-F 3.0 V.sub.0 (20 C.): = 2.21 V 10 PGUQU-4-F 3.0

Mixture Example S23 (Stabilised with Compound of Formula ST-2-3)

[0629] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00058 Mixture M23 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Example M24

[0630] A nematic LC medium is formulated as follows:

TABLE-US-00059 Composition Conc., Nr. Comp. wt.-% Properties 1 CC-3-V 20.0 T(N, I) = 102.7 C. 2 CC-3-V1 15.0 n (589 nm, 20 C.): = 0.0864 3 CC-3-2V1 8.0 .sub. (1 kHz, 20 C.): = 8.2 4 CCQU-3-F 7.0 .sub. (1 kHz, 20 C.): = 2.7 5 CLP-3-T 6.0 (1 kHz, 20 C.): = 5.5 6 CLU-3-F 15.0 .sub.1 (20 C.): = 102 mPa .Math. s 7 CCP-V-1 8.0 K.sub.1 (20 C.): = 19.3 pN 8 CLP-V-1 5.0 K.sub.3 (20 C.): = 22.8 pN 9 CCP-V2-1 8.0 V.sub.0 (20 C.): = 2.00 V 10 CDUQU-3-F 6.0 11 DGUQU-4-F 2.0

Mixture Example S24 (Stabilised with Compounds of Formulae ST-2-3 and H-3-3)

[0631] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00060 Mixture M24 99.955 wt.-% Compound of Formula ST-2-3 300 ppm Compound of Formula H-3-3 150 ppm

Example M25

[0632] A nematic LC medium is formulated as follows:

TABLE-US-00061 Composition Conc., Nr. Comp. wt.-% Properties 1 CC-3-V 20.0 T(N, I) = 103 C. 2 CC-3-V1 15.0 n (589 nm, 20 C.): = 0.0848 3 CC-3-2V1 8.0 .sub. (1 kHz, 20 C.): = 8.1 4 CCQU-3-F(1) 7.0 .sub. (1 kHz, 20 C.): = 2.7 5 CLP-3-T 6.0 (1 kHz, 20 C.): = 5.5 6 CLU-3-F 15.0 .sub.1 (20 C.): = 111 mPa .Math. s 7 CCP-V-1 8.0 K.sub.1 (20 C.): = 19.1 pN 8 CLP-V-1 5.0 K.sub.3 (20 C.): = 22.9 pN 9 CCP-V2-1 8.0 V.sub.0 (20 C.): = 2.02 V 10 CDUQU-3-F(1) 6.0 11 DGUQU-4-F(1) 2.0

Mixture Example S25 (Stabilised with Compounds of Formulae ST-2-3 and H-3-3)

[0633] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00062 Mixture M25 99.955 wt.-% Compound of Formula ST-2-3 300 ppm Compound of Formula H-3-3 150 ppm

Example M26

[0634] A nematic LC medium is formulated as follows:

TABLE-US-00063 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 3.0 T(N, I) = C. 2 CC-3-V 34.6 n (589 nm, 20 C.):= 3 CC-3-V1 6.0 .sub. (1 kHz, 20 C.):= 4 CCH-23 3.0 .sub. (1 kHz, 20 C.):= 5 CCH-34 3.0 (1 kHz, 20 C.):= 6 CCP-V-1 11.0 .sub.1 (20 C.): = mPa .Math. s 7 CCP-V2-1 8.3 K.sub.1 (20 C.): = pN 8 CCVC-3-V 6.0 K.sub.3 (20 C.): = pN 9 CDUQU-3-F 4.8 V.sub.0 (20 C.): = V 10 CLP-V-1 6.0 11 CLU-3-F 3.0 12 CPGU-3-OT 3.3 13 DGUQU-4-F 3.0 14 DLGU-3-F 4.0 15 PP-1-2V1 1.0

Mixture Example S26 (Stabilised with Compound of Formula ST-2-3)

[0635] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00064 Mixture M26 99.96 wt.-% Compound of Formula ST-2-3 400 ppm

Example M27

[0636] A nematic LC medium is formulated as follows:

TABLE-US-00065 Composition Conc., Nr. Comp. wt.-% Properties 1 APUQU-3-F 1.6 T(N, I) = C. 2 BCH-32 3.0 n (589 nm, 20 C.):= 3 CC-3-V 37.5 .sub. (1 kHz, 20 C.):= 4 CC-3-V1 6.0 .sub. (1 kHz, 20 C.):= 5 CCP-V-1 12.0 (1 kHz, 20 C.):= 6 CCP-V2-1 8.0 .sub.1 (20 C.): = mPa .Math. s 7 CCVC-3-V 6.0 K.sub.1 (20 C.): = pN 8 CDUQU-3-F 6.0 K.sub.3 (20 C.): = pN 9 CLP-V-1 6.0 V.sub.0 (20 C.): = V 10 CLU-3-F 3.0 11 CLY-3-O2 3.0 12 DGUQU-4-F 3.0 13 DLGU-3-F 3.5 14 PP-1-2V1 1.4

Mixture Example S27 (Stabilised with Compound of Formula ST-2-3)

[0637] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00066 Mixture M26 99.96 wt.-% Compound of Formula ST-2-3 400 ppm

Example M28

[0638] A nematic LC medium is formulated as follows:

TABLE-US-00067 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 6.5 T(N, I) = 99.7 C. 2 CC-3-V 27.5 n (589 nm, 20 C.): = 0.1090 3 CC-3-V1 3.0 .sub. (1 kHz, 20 C.): = 8.7 4 CCP-3-1 6.0 .sub. (1 kHz, 20 C.): = 2.9 5 CCP-3-3 5.0 (1 kHz, 20 C.): = 5.9 6 CCP-3F.F.F 1.0 .sub.1 (20 C.): = 99 mPa .Math. s 7 CCP-V-1 10.0 K.sub.1 (20 C.): = 17.5 pN 8 CCPC-33 2.0 K.sub.3 (20 C.): = 18.4 pN 9 CLP-3-T 8.0 V.sub.0 (20 C.): = 1.82 V 10 CLU-3-F 5.0 11 PCH-302 10.0 12 PGUQU-3-F 7.0 13 PGUQU-4-F 7.0 14 PGUQU-5-F 2.0

Mixture Example S28 (Stabilised with Compound of Formula ST-2-3)

[0639] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00068 Mixture M28 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Mixture Example S28a (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0640] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00069 Mixture M28 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm [00676]H-3-1

Example M29

[0641] A nematic LC medium is formulated as follows:

TABLE-US-00070 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 3.0 T(N, I) = 99.9 C. 2 BCH-3F.F 8.0 n (589 nm, 20 C.): = 0.1092 3 CC-3-V 25.0 .sub. (1 kHz, 20 C.): = 8.7 4 CCP-3-1 6.0 .sub. (1 kHz, 20 C.): = 3.0 5 CCP-3-3 5.0 (1 kHz, 20 C.): = 5.7 6 CCP-V-1 7.5 .sub.1 (20 C.):112 mPa .Math. s 7 CCPC-33 2.0 K.sub.1 (20 C.): = 17.5 pN 8 CCPC-34 2.0 K.sub.3 (20 C.): = 18.5 pN 9 CLP-3-T 8.0 V.sub.0 (20 C.): = 1.84 V 10 CLU-3-F 11.5 11 PCH-302 10.0 12 PGUQU-3-F 7.5 13 PGUQU-4-F 3.0 14 PP-1-2V1 1.5

Mixture Example S29 (Stabilised with Compound of Formula ST-2-3)

[0642] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00071 Mixture M29 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Mixture Example S29a (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0643] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00072 Mixture M29 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M30

[0644] A nematic LC medium is formulated as follows:

TABLE-US-00073 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 4.5 T(N, I) = 100.9 C. 2 BCH-3F.F 10.0 n (589 nm, 20 C.): = 0.1104 3 CC-3-V 24.0 .sub. (1 kHz, 20 C.): = 8.9 4 CCH-35 4.0 .sub. (1 kHz, 20 C.): = 3.0 5 CCP-3-1 6.0 (1 kHz, 20 C.): = 5.9 6 CCP-3-3 5.0 .sub.1 (20 C.): = 111 mPa .Math. s 7 CCP-V-1 5.0 K.sub.1 (20 C.): = 18.1 pN 8 CCPC-33 2.0 K.sub.3 (20 C.): = 18.4 pN 9 CCPC-34 2.0 V.sub.0 (20 C.): = 1.83 V 10 CLP-3-T 8.0 11 CLU-3-F 6.0 12 PCH-302 10.0 13 PGUQU-3-F 7.5 14 PGUQU-4-F 5.5 15 PP-1-2V1 0.5

Mixture Example S30 (Stabilised with Compound of Formula ST-2-3)

[0645] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00074 Mixture M30 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Mixture Example S30a (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0646] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00075 Mixture M30 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M31

[0647] A nematic LC medium is formulated as follows:

TABLE-US-00076 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 9.0 T(N, I) = C. 2 CC-3-V 24.5 n (589 nm, 20 C.): = 3 CC-3-V1 7.0 .sub. (1 kHz, 20 C.): = 4 CCP-3-1 6.5 .sub. (1 kHz, 20 C.): = 5 CCP-3-3 5.0 (1 kHz, 20 C.): = 6 CCP-V-1 9.0 .sub.1 (20 C.): = mPa .Math. s 7 CCPC-33 1.0 K.sub.1 (20 C.): = pN 8 CLP-3-T 6.0 K.sub.3 (20 C.): = pN 9 CLU-3-F 6.5 V.sub.0 (20 C.): = V 10 PCH-302 9.0 11 PGUQU-3-F 6.0 12 PGUQU-4-F 7.0 13 PGUQU-5-F 3.5

Mixture Example S31 (Stabilised with Compound of Formula ST-2-3)

[0648] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00077 Mixture M31 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Mixture Example S31a (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0649] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00078 Mixture M31 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M32

[0650] A nematic LC medium is formulated as follows:

TABLE-US-00079 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 7.0 T(N, I) = 100.2 C. 2 CC-3-V 22.0 n (589 nm, 20 C.): = 0.1115 3 CC-3-V1 8.0 .sub. (1 kHz, 20 C.): = 8.7 4 CCP-3-1 7.0 .sub. (1 kHz, 20 C.): = 2.9 5 CCP-3-3 5.0 (1 kHz, 20 C.): = 5.8 6 CCP-V-1 13.0 .sub.1 (20 C.): = 97 mPa .Math. s 7 CLP-3-T 6.0 K.sub.1 (20 C.): = 17.9 pN 8 CLU-3-F 5.0 K.sub.3 (20 C.): = 18.8 pN 9 PCH-302 10.0 V.sub.0 (20 C.): = 1.84 V 10 PGUQU-3-F 6.0 11 PGUQU-4-F 7.0 12 PGUQU-5-F 4.0

Mixture Example S32 (Stabilised with Compound of Formula ST-2-3)

[0651] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00080 Mixture M32 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Mixture Example S32a (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0652] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00081 Mixture M32 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M33

[0653] A nematic LC medium is formulated as follows:

TABLE-US-00082 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 9.0 T(N, I) = C. 2 BCH-3F.F 2.0 n (589 nm, 20 C.): = 3 CC-3-V 28.0 .sub. (1 kHz, 20 C.): = 4 CCP-3-1 7.0 .sub. (1 kHz, 20 C.): = 5 CCP-3-3 3.5 (1 kHz, 20 C.): = 6 CCP-V-1 12.5 .sub.1 (20 C.): = mPa .Math. s 7 CLP-3-T 8.0 K.sub.1 (20 C.): = pN 8 CLU-3-F 9.0 K.sub.3 (20 C.): = pN 9 PCH-302 7.0 V.sub.0 (20 C.): = V 10 PGUQU-3-F 6.0 11 PGUQU-4-F 7.0 12 PGUQU-5-F 1.0

Mixture Example S33 (Stabilised with Compound of Formula ST-2-3)

[0654] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00083 Mixture M33 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Mixture Example S33a (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0655] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00084 Mixture M33 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M34

[0656] A nematic LC medium is formulated as follows:

TABLE-US-00085 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 7.0 T(N, I) = 100.4 C. 2 CC-3-V 26.5 n (589 nm, 20 C.): = 0.1112 3 CC-3-V1 1.0 .sub. (1 kHz, 20 C.): = 8.7 4 CCP-3-1 7.0 .sub. (1 kHz, 20 C.): = 2.9 5 CCP-3-3 5.0 (1 kHz, 20 C.): = 5.9 6 CCP-V-1 13.0 .sub.1 (20 C.): = 99 mPa .Math. s 7 CCPC-33 0.5 K.sub.1 (20 C.): = 17.8 pN 8 CLP-3-T 8.0 K.sub.3 (20 C.): = 18.7 pN 9 CLU-3-F 6.0 V.sub.0 (20 C.): = 1.83 V 10 PCH-302 10.0 11 PGUQU-3-F 5.0 12 PGUQU-4-F 7.0 13 PGUQU-5-F 4.0

Mixture Example S34 (Stabilised with Compound of Formula ST-2-3)

[0657] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00086 Mixture M34 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Mixture Example S34a (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0658] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00087 Mixture M34 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M35

[0659] A nematic LC medium is formulated as follows:

TABLE-US-00088 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 8.0 T(N, I) = 100 C. 2 CC-3-V 25.5 n (589 nm, 20 C.): = 0.1101 3 CC-3-V1 4.5 .sub. (1 kHz, 20 C.): = 8.7 4 CCP-3-1 7.5 .sub. (1 kHz, 20 C.): = 2.9 5 CCP-3-3 4.5 (1 kHz, 20 C.): = 5.9 6 CCP-V-1 9.0 .sub.1 (20 C.): = 98 mPa .Math. s 7 CCPC-33 1.5 K.sub.1 (20 C.): = 17.7 pN 8 CLP-3-T 6.0 K.sub.3 (20 C.): = 18.6 pN 9 CLU-3-F 7.5 V.sub.0 (20 C.): = 1.82 V 10 PCH-302 10.0 11 PGUQU-3-F 5.5 12 PGUQU-4-F 7.0 13 PGUQU-5-F 3.5

Mixture Example S35 (Stabilised with Compound of Formula ST-2-3)

[0660] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00089 Mixture M35 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Mixture Example S35a (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0661] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00090 Mixture M35 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M36

[0662] A nematic LC medium is formulated as follows:

TABLE-US-00091 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 8.0 T(N, I) = C. 2 BCH-3F.F 0.5 n (589 nm, 20 C.): = 3 CC-3-V 24.5 .sub. (1 kHz, 20 C.): = 4 CC-3-V1 6.5 .sub. (1 kHz, 20 C.): = 5 CCP-3-1 7.0 (1 kHz, 20 C.): = 6 CCP-3-3 5.0 .sub.1 (20 C.): = mPa .Math. s 7 CCP-V-1 8.5 K.sub.1 (20 C.): = pN 8 CCPC-33 1.5 K.sub.3 (20 C.): = pN 9 CLP-3-T 6.0 V.sub.0 (20 C.): = V 10 CLU-3-F 6.0 11 PCH-302 10.0 12 PGUQU-3-F 4.0 13 PGUQU-4-F 7.0 14 PGUQU-5-F 5.5

Mixture Example S36 (Stabilised with Compound of Formula ST-2-3)

[0663] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00092 Mixture M36 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Mixture Example S36a (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0664] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00093 Mixture M36 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M37

[0665] A nematic LC medium is formulated as follows:

TABLE-US-00094 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 7.5 T(N, I) = C. 2 BCH-3F.F 0.5 n (589 nm, 20 C.): = 3 CC-3-V 24.5 .sub. (1 kHz, 20 C.): = 4 CC-3-V1 7.0 .sub. (1 kHz, 20 C.): = 5 CCP-3-1 7.0 (1 kHz, 20 C.): = 6 CCP-3-3 4.0 .sub.1 (20 C.): = mPa .Math. s 7 CCP-V-1 9.0 K.sub.1 (20 C.): = pN 8 CCPC-33 2.0 K.sub.3 (20 C.): = pN 9 CLP-3-T 6.0 V.sub.0 (20 C.): = V 10 CLU-3-F 6.0 11 PCH-302 10.0 12 PGUQU-3-F 4.5 13 PGUQU-4-F 7.0 14 PGUQU-5-F 5.0

Mixture Example S37 (Stabilised with Compound of Formula ST-2-3)

[0666] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00095 Mixture M37 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Mixture Example S37a (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0667] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00096 Mixture M37 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M38

[0668] A nematic LC medium is formulated as follows:

TABLE-US-00097 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 6.5 T(N, I) = 101 C. 2 CC-3-V 26.5 n (589 nm, 20 C.): = 0.1097 3 CC-3-V1 3.0 .sub. (1 kHz, 20 C.): = 8.7 4 CCP-3-1 6.0 .sub. (1 kHz, 20 C.): = 2.9 5 CCP-3-3 5.0 (1 kHz, 20 C.): = 5.9 6 CCP-3F.F.F 1.0 .sub.1 (20 C.): = 99 mPa .Math. s 7 CCP-V-1 11.0 K.sub.1 (20 C.): = 17.8 pN 8 CCPC-33 2.0 K.sub.3 (20 C.): = 18.9 pN 9 CLP-3-T 8.0 V.sub.0 (20 C.): = 1.83 V 10 CLU-3-F 5.0 11 PCH-302 10.0 12 PGUQU-3-F 7.0 13 PGUQU-4-F 7.0 14 PGUQU-5-F 2.0

Mixture Example S38 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0669] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00098 Mixture M38 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M39

[0670] A nematic LC medium is formulated as follows:

TABLE-US-00099 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 7.0 T(N, I) = 100.4 C. 2 CC-3-V 28.5 n (589 nm, 20 C.): = 0.1109 3 CC-3-V1 0.5 .sub. (1 kHz, 20 C.): = 8.8 4 CCP-3-1 7.0 .sub. (1 kHz, 20 C.): = 2.9 5 CCP-3-3 5.0 (1 kHz, 20 C.): = 5.9 6 CCP-V-1 10.5 .sub.1 (20 C.): = 98 mPa .Math. s 7 CCPC-33 2.0 K.sub.1 (20 C.): = 18.0 pN 8 CLP-3-T 7.0 K.sub.3 (20 C.): = 18.6 pN 9 CLU-3-F 5.0 V.sub.0 (20 C.): = 1.84 V 10 PCH-302 10.5 11 PGUQU-3-F 5.0 12 PGUQU-4-F 7.0 13 PGUQU-5-F 5.0

Mixture Example S39 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0671] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00100 Mixture M39 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M40

[0672] A nematic LC medium is formulated as follows:

TABLE-US-00101 Composition Conc., Nr. Comp. wt.-% Properties 1 APUQU-3-F 2.0 T(N, I) = 101.1 C. 2 BCH-32 8.0 n (589 nm, 20 C.): = 0.1110 3 CC-3-V 25.0 .sub. (1 kHz, 20 C.): = 8.7 4 CCP-3-1 6.0 .sub. (1 kHz, 20 C.): = 2.9 5 CCP-3-3 5.0 (1 kHz, 20 C.): = 5.8 6 CCP-30CF3 5.5 .sub.1 (20 C.): = 97 mPa .Math. s 7 CCP-V-1 12.5 K.sub.1 (20 C.): = 18.0 pN 8 CLP-3-T 6.5 K.sub.3 (20 C.): = 18.6 pN 9 CLU-3-F 3.5 V.sub.0 (20 C.): = 1.84 V 10 PCH-302 11.5 11 PGUQU-3-F 3.0 12 PGUQU-4-F 6.0 13 PGUQU-5-F 5.5

Mixture Example S40 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0673] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00102 Mixture M40 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M41

[0674] A nematic LC medium is formulated as follows:

TABLE-US-00103 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 8.5 T(N, I) = 101.4 C. 2 CC-3-V 25.0 n (589 nm, 20 C.): = 0.1108 3 CC-3-V1 0.5 .sub. (1 kHz, 20 C.): = 8.7 4 CCP-3-1 7.0 .sub. (1 kHz, 20 C.): = 2.9 5 CCP-3-3 2.0 (1 kHz, 20 C.): = 5.8 6 CCP-30CF3 5.5 .sub.1 (20 C.): = 97 mPa .Math. s 7 CCP-V-1 14.0 K.sub.1 (20 C.): = 17.8 pN 8 CLP-3-T 6.5 K.sub.3 (20 C.): = 18.5 pN 9 CLU-3-F 5.0 V.sub.0 (20 C.): = 1.83 V 10 DGUQU-4-F 1.0 11 PCH-302 10.5 12 PGUQU-3-F 3.0 13 PGUQU-4-F 6.0 14 PGUQU-5-F 5.5

Mixture Example S41 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0675] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00104 Mixture M41 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M42

[0676] A nematic LC medium is formulated as follows:

TABLE-US-00105 Composition Conc., Nr. Comp. wt.-% Properties 1 CC-3-V 24.0 T(N, I) = 100.4 C. 2 CCP-3-1 7.0 n (589 nm, 20 C.): = 0.1110 3 CCP-3-3 3.0 .sub. (1 kHz, 20 C.): = 8.8 4 CCP-30CF3 8.0 .sub. (1 kHz, 20 C.): = 2.9 5 CCP-3F.F.F 3.0 (1 kHz, 20 C.): = 5.9 6 CCP-50CF3 1.5 .sub.1 (20 C.): = 98 mPa .Math. s 7 CCP-V-1 13.5 K.sub.1 (20 C.): = 17.5 pN 8 CLP-3-T 7.5 K.sub.3 (20 C.): = 18.7 pN 9 CLU-3-F 3.0 V.sub.0 (20 C.): = 1.81 V 10 PCH-302 11.0 11 PGP-2-3 4.5 12 PGUQU-3-F 8.0 14 PGUQU-4-F 6.0

Mixture Example S42 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0677] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00106 Mixture M42 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M43

[0678] A nematic LC medium is formulated as follows:

TABLE-US-00107 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 4.0 T(N, I) = 100.5 C. 2 CC-3-V 26.0 n (589 nm, 20 C.): = 0.1109 3 CC-3-V1 4.5 .sub. (1 kHz, 20 C.): = 8.7 4 CCP-3-1 4.5 .sub. (1 kHz, 20 C.): = 2.9 5 CCP-3-3 5.0 (1 kHz, 20 C.): = 5.8 6 CCP-3F.F.F 3.0 .sub.1 (20 C.): = 99 mPa .Math. s 7 CCP-V-1 11.0 K.sub.1 (20 C.): = 17.3 pN 8 CCPC-33 3.0 K.sub.3 (20 C.): = 18.5 pN 9 CLP-3-T 6.0 V.sub.0 (20 C.): = 1.80 V 10 CLU-3-F 4.5 11 PCH-302 10.0 12 PGP-2-3 2.5 13 PGUQU-3-F 7.0 14 BCH-32 4.0 15 CC-3-V 26.0

Mixture Example S43 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0679] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00108 Mixture M43 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M44

[0680] A nematic LC medium is formulated as follows:

TABLE-US-00109 Composition Conc., Nr. Comp. wt.-% Properties 1 APUQU-3-F 2.5 T(N, I) = 100.3 C. 2 BCH-32 8.0 n (589 nm, 20 C.): = 0.1105 3 CC-3-V 19.5 .sub. (1 kHz, 20 C.): = 8.7 4 CC-3-V1 8.0 .sub. (1 kHz, 20 C.): = 2.9 5 CCP-3-1 6.0 (1 kHz, 20 C.): = 5.8 6 CCP-3-3 5.0 .sub.1 (20 C.): = 98 mPa .Math. s 7 CCP-3F.F.F 3.5 K.sub.1 (20 C.): = 17.7 pN 8 CCP-V-1 13.0 K.sub.3 (20 C.): = 18.7 pN 9 CLP-3-T 4.5 V.sub.0 (20 C.): = 1.83 V 10 CLU-3-F 5.0 11 PCH-302 11.0 12 PGP-2-3 0.5 13 PGUQU-3-F 5.5 14 PGUQU-4-F 6.0 15 PGUQU-5-F 2.0

Mixture Example S44 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0681] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00110 Mixture M44 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M45

[0682] A nematic LC medium is formulated as follows:

TABLE-US-00111 Composition Conc., Nr. Comp. wt.-% Properties 1 APUQU-3-F 2.0 T(N, I) = 100.7 C. 2 BCH-32 7.0 n (589 nm, 20 C.): = 0.1097 3 CC-3-V 26.5 .sub. (1 kHz, 20 C.): = 8.7 4 CC-3-V1 1.0 .sub. (1 kHz, 20 C.): = 2.9 5 CCP-3-1 7.0 (1 kHz, 20 C.): = 5.8 6 CCP-3-3 5.0 .sub.1 (20 C.): = 100 mPa .Math. s 7 CCP-V-1 13.0 K.sub.1 (20 C.): = 18.0 pN 8 CCPC-33 0.5 K.sub.3 (20 C.): = 18.7 pN 9 CLP-3-T 8.0 V.sub.0 (20 C.): = 1.84 V 10 CLU-3-F 6.0 11 PCH-302 10.0 12 PGUQU-3-F 3.0 13 PGUQU-4-F 5.0 14 PGUQU-5-F 6.0

Mixture Example S45 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0683] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00112 Mixture M45 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M46

[0684] A nematic LC medium is formulated as follows:

TABLE-US-00113 Composition Conc., Nr. Comp. wt.-% Properties 1 APUQU-3-F 3.0 T(N, I) = C. 2 BCH-32 9.0 n (589 nm, 20 C.):= 3 CC-3-V 25.5 .sub. (1 kHz, 20 C.):= 4 CCP-3-1 6.0 .sub. (1 kHz, 20 C.):= 5 CCP-3-3 3.0 (1 kHz, 20 C.):= 6 CCP-30CF3 2.5 .sub.1 (20 C.): = mPa .Math. s 7 CCP-3F.F.F 0.5 K.sub.1 (20 C.): = pN 8 CCP-V-1 14.0 K.sub.3 (20 C.): = pN 9 CCP-V2-1 1.0 V.sub.0 (20 C.): = V 10 CLP-3-T 6.5 11 CLU-3-F 6.0 12 PCH-302 10.0 13 PGUQU-3-F 3.0 14 PGUQU-4-F 5.0 15 PGUQU-5-F 5.0

Mixture Example S46 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0685] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00114 Mixture M46 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M47

[0686] A nematic LC medium is formulated as follows:

TABLE-US-00115 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 9.0 T(N, I) = C. 2 CC-3-V 20.5 n (589 nm, 20 C.):= 3 CC-3-V1 7.0 .sub. (1 kHz, 20 C.): = 4 CCP-3-1 6.0 .sub. (1 kHz, 20 C.): = 5 CCP-3-3 5.0 (1 kHz, 20 C.): = 6 CCP-30CF3 2.5 .sub.1 (20 C.): = mPa .Math. s 7 CCP-V-1 11.5 K.sub.1 (20 C.): = pN 8 CLP-3-T 0.5 K.sub.3 (20 C.): = pN 9 CLU-3-F 13.5 V.sub.0 (20 C.): = V 10 DGUQU-4-F 1.0 11 PCH-302 10.0 12 PGU-2-F 0.5 13 PGUQU-3-F 3.0 14 PGUQU-4-F 5.0 15 PGUQU-5-F 4.0 16 PPGU-3-F 1.0

Mixture Example S47 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0687] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00116 Mixture M47 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M48

[0688] A nematic LC medium is formulated as follows:

TABLE-US-00117 Composition Conc., Nr. Comp. wt.-% Properties 1 APUQU-3-F 2.0 T(N, I) = 100.4 C. 2 BCH-32 4.0 n (589 nm, 20 C.): = 0.1113 3 CC-3-V 18.5 .sub. (1 kHz, 20 C.): = 8.6 4 CC-3-V1 8.5 .sub. (1 kHz, 20 C.): = 2.9 5 CCP-3-1 5.0 (1 kHz, 20 C.): = 5.8 6 CCP-3-3 5.0 .sub.1 (20 C.): = 99 mPa .Math. s 7 CCP-V-1 20.0 K.sub.1 (20 C.): = 16.8 pN 8 CCPC-33 0.5 K.sub.3 (20 C.): = 18.8 pN 9 CLP-3-T 1.5 V.sub.0 (20 C.): = 1.80 V 10 CLU-3-F 9.0 11 PCH-302 10.0 12 PGU-3-F 4.0 13 PGUQU-3-F 2.0 14 PGUQU-4-F 4.0 15 PGUQU-5-F 6.0

Mixture Example S48 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0689] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00118 Mixture M48 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M49

[0690] A nematic LC medium is formulated as follows:

TABLE-US-00119 Composition Conc., Nr. Comp. wt.-% Properties 1 APUQU-3-F 2.0 T(N, I) = 101.2 C. 2 BCH-32 9.0 n (589 nm, 20 C.): = 0.1106 3 CC-3-V 25.5 .sub. (1 kHz, 20 C.): = 8.7 4 CC-3-V1 3.5 .sub. (1 kHz, 20 C.): = 2.9 5 CCP-3-1 5.5 (1 kHz, 20 C.): = 5.8 6 CCP-V-1 14.5 .sub.1 (20 C.): = 99 mPa .Math. s 7 CCPC-33 2.0 K.sub.1 (20 C.): = 17.6 pN 8 CLP-3-T 7.0 K.sub.3 (20 C.): = 18.6 pN 9 CLU-3-F 7.0 V.sub.0 (20 C.): = 1.82 V 10 PCH-302 10.0 11 PGUQU-3-F 3.0 12 PGUQU-4-F 5.0 13 PGUQU-5-F 6.0

Mixture Example S49 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0691] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00120 Mixture M49 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M50

[0692] A nematic LC medium is formulated as follows:

TABLE-US-00121 Composition Conc., Nr. Comp. wt.-% Properties 1 APUQU-3-F 2.0 T(N, I) = 101.3 C. 2 BCH-32 9.0 n (589 nm, 20 C.):= 3 CC-3-V 19.5 .sub. (1 kHz, 20 C.): = 8.7 4 CC-3-V1 8.5 .sub. (1 kHz, 20 C.): = 2.9 5 CCP-3-1 7.0 .sub. (1 kHz, 20 C.): = 5.8 6 CCP-3-3 1.5 .sub.1 (20 C.): = 100 mPa .Math. s 7 CCP-3F.F.F 4.0 K.sub.1 (20 C.): = 18.1 pN 8 CCP-V-1 14.0 K.sub.3 (20 C.): = 19.0 pN 9 CLP-3-T 6.5 V.sub.0 (20 C.): = 1.85 V 10 CLU-3-F 4.5 11 PCH-302 10.0 12 PGUQU-3-F 3.0 13 PGUQU-4-F 5.0 14 PGUQU-5-F 5.5

Mixture Example S50 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0693] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00122 Mixture M50 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example MP1

[0694] A nematic LC medium is formulated as follows:

TABLE-US-00123 Composition Conc., Nr. Comp. wt.-% Properties 1 APUQU-3-F 2.0 T(N, I) = 101 C. 2 BCH-32 5.0 n (589 nm, 20 C.): = 0.1114 3 CC-3-V 21.5 .sub. (1 kHz, 20 C.): = 8.7 4 CC-3-V1 8.0 .sub. (1 kHz, 20 C.): = 2.9 5 CCP-3-1 7.0 (1 kHz, 20 C.): = 5.8 6 CCP-3-3 4.5 .sub.1 (20 C.): = 100 mPa .Math. s 7 CCP-V-1 13.5 K.sub.1 (20 C.): = 18.0 pN 8 CCPC-33 1.5 K.sub.3 (20 C.): = 18.9 pN 9 CLP-3-T 6.5 V.sub.0 (20 C.): = 1.85 V 10 CLU-3-F 4.0 11 PCH-302 10.0 12 PGU-3-F 4.0 13 PGUQU-3-F 3.0 14 PGUQU-4-F 5.0 15 PGUQU-5-F 4.5

Mixture Example S51 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0695] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00124 Mixture M51 99.85 wt. % Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M52

[0696] A nematic LC medium is formulated as follows:

TABLE-US-00125 Composition Conc., Nr. Comp. wt.-% Properties 1 APUQU-3-F 2.0 T(N, I) = 100.6 C. 2 BCH-32 9.0 n (589 nm, 20 C.): = 0.1107 3 CC-3-V 19.5 .sub. (1 kHz, 20 C.): = 8.7 4 CC-3-V1 10.0 .sub. (1 kHz, 20 C.): = 2.9 5 CCP-3-1 7.0 (1 kHz, 20 C.): = 5.8 6 CCP-V-1 14.0 .sub.1 (20 C.): = 98 mPa .Math. s 7 CCPC-33 1.0 K.sub.1 (20 C.): = 17.5 pN 8 CLP-3-T 2.5 K.sub.3 (20 C.): = 18.8 pN 9 CLU-3-F 11.5 V.sub.0 (20 C.): = 1.81 V 10 PCH-302 10.0 11 PGUQU-3-F 3.0 12 PGUQU-4-F 4.5 13 PGUQU-5-F 6.0

Mixture Example S52 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0697] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00126 Mixture M52 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M53

[0698] A nematic LC medium is formulated as follows:

TABLE-US-00127 Composition Conc., Nr. Comp. wt.-% Properties 1 APUQU-3-F(1) 2.0 T(N, I) = 101 C. 2 BCH-32 9.0 n (589 nm, 20 C.): = 0.1086 3 CC-3-V 19.5 .sub. (1 kHz, 20 C.): = 8.7 4 CC-3-V1 10.0 .sub. (1 kHz, 20 C.): = 2.9 5 CCP-3-1 7.0 (1 kHz, 20 C.): = 5.8 6 CCP-V-1 14.0 .sub.1 (20 C.): = 107 mPa .Math. s 7 CCPC-33 1.0 K.sub.1 (20 C.): = 17.2 pN 8 CLP-3-T 2.5 K.sub.3 (20 C.): = 19.0 pN 9 CLU-3-F 11.5 V.sub.0 (20 C.): = 1.83 V 10 PCH-302 10.0 11 PGUQU-3-F(1) 3.0 12 PGUQU-4-F(1) 4.5 13 PGUQU-5-F(1) 6.0

Mixture Example S53 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0699] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00128 Mixture M53 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M54

[0700] A nematic LC medium is formulated as follows:

TABLE-US-00129 Composition Conc., Nr. Comp. wt.-% Properties 1 APUQU-3-F 2.0 T(N, I) = 101 C. 2 BCH-32 2.5 n (589 nm, 20 C.): = 0.1108 3 CC-3-V 22.5 .sub. (1 kHz, 20 C.): = 8.7 4 CC-3-V1 6.5 .sub. (1 kHz, 20 C.): = 2.9 5 CCP-3-1 7.0 (1 kHz, 20 C.): = 5.8 6 CCP-3-3 4.0 .sub.1 (20 C.): = 103 mPa .Math. s 7 CCP-V-1 13.0 K.sub.1 (20 C.): = 17.5 pN 8 CCP-V2-1 1.5 K.sub.3 (20 C.): = 18.9 pN 9 CCPC-33 3.0 V.sub.0 (20 C.): = 1.83 V 10 CLP-3-T 6.5 11 CLU-3-F 4.5 12 PCH-302 10.0 13 PGU-2-F 3.5 14 PGU-3-F 3.5 15 PGUQU-3-F 3.0 16 PGUQU-4-F 4.0

Mixture Example S54 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0701] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00130 Mixture M54 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M55

[0702] A nematic LC medium is formulated as follows:

TABLE-US-00131 Composition Conc., Nr. Comp. wt.-% Properties 1 APUQU-3-F 2.0 T(N, I) = 100.7 C. 2 BCH-32 2.5 n (589 nm, 20 C.): = 0.1108 3 CC-3-V 22.0 .sub. (1 kHz, 20 C.): = 8.7 4 CC-3-V1 7.0 .sub. (1 kHz, 20 C.): = 2.9 5 CCP-3-1 7.0 (1 kHz, 20 C.): = 5.8 6 CCP-3-3 5.0 .sub.1 (20 C.): = 104 mPa .Math. s 7 CCP-V-1 13.0 K.sub.1 (20 C.): = 17.5 pN 8 CCP-V2-1 0.5 K.sub.3 (20 C.): = 18.8 pN 9 CCPC-33 3.0 V.sub.0 (20 C.): = 1.83 V 10 CLP-3-T 6.5 11 CLU-3-F 4.0 12 PCH-302 10.0 13 PGU-2-F 5.0 14 PGU-3-F 2.5 15 PGUQU-4-F 5.0 16 PGUQU-5-F 5.0

Mixture Example S55 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0703] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00132 Mixture M55 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M56

[0704] A nematic LC medium is formulated as follows:

TABLE-US-00133 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 9.0 T(N, I) = 99.7 C. 2 CC-3-V 31.5 n (589 nm, 20 C.): = 0.1104 3 CCG-V-F 4.0 .sub. (1 kHz, 20 C.): = 8.6 4 CCP-3-1 5.0 .sub. (1 kHz, 20 C.): = 2.9 5 CCP-3-3 5.0 (1 kHz, 20 C.): = 5.8 6 CCP-V-1 9.5 .sub.1 (20 C.): = 91 mPa .Math. s 7 CCPC-33 3.0 K.sub.1 (20 C.): = 16.4 pN 8 CDUQU-3-F 1.0 K.sub.3 (20 C.): = 17.4 pN 9 CLU-3-F 13.0 V.sub.0 (20 C.): = 1.77 V 10 DGUQU-4-F 1.0 11 PGU-2-F 2.5 12 PGUQU-3-F 3.5 13 PGUQU-4-F 4.0 14 PGUQU-5-F 3.0 15 PP-1-2V1 5.0

Mixture Example S56 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0705] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00134 Mixture M56 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M57

[0706] A nematic LC medium is formulated as follows:

TABLE-US-00135 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 8.0 T(N, I) = 103.6 C. 2 BCH-5F.F.F 2.5 n (589 nm, 20 C.): = 0.1116 3 CBC-33 0.5 .sub. (1 kHz, 20 C.): = 8.6 4 CC-3-V 34.0 .sub. (1 kHz, 20 C.): = 2.8 5 CC-3-V1 1.0 (1 kHz, 20 C.): = 5.8 6 CCP-3-1 10.0 .sub.1 (20 C.): = 97 mPa .Math. s 7 CCP-30CF3 8.0 K.sub.1 (20 C.): = 17.8 pN 8 CCP-V-1 0.5 K.sub.3 (20 C.): = 18.5 pN 9 CCPC-33 2.0 V.sub.0 (20 C.): = 1.84 V 10 CCPC-35 4.0 11 CLU-3-F 9.0 12 PGUQU-3-F 8.0 13 PGUQU-4-F 4.0 14 PGUQU-5-F 2.0 15 PP-1-2V1 6.5

Mixture Example S57 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0707] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00136 Mixture M57 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M58

[0708] A nematic LC medium is formulated as follows:

TABLE-US-00137 Composition Conc., Nr. Comp. wt.-% Properties 1 APUQU-3-F 2.5 T(N, I) = 100.3 C. 2 BCH-32 4.0 n (589 nm, 20 C.): = 0.1119 3 CC-3-V 22.0 .sub. (1 kHz, 20 C.): = 8.8 4 CC-3-V1 8.0 .sub. (1 kHz, 20 C.): = 3.0 5 CCP-3-1 7.0 (1 kHz, 20 C.): = 5.9 6 CCP-3-3 5.0 .sub.1 (20 C.): = 99 mPa .Math. s 7 CCP-V-1 12.0 K.sub.1 (20 C.): = 17.1 pN 8 CCP-V2-1 1.0 K.sub.3 (20 C.): = 18.6 pN 9 CCPC-33 2.5 V.sub.0 (20 C.): = 1.81 V 10 CLP-3-T 6.0 11 CLU-3-F 2.0 12 PCH-302 10.0 13 PGU-2-F 7.0 14 PGUQU-3-F 3.0 15 PGUQU-4-F 5.0 16 PGUQU-5-F 3.0

Mixture Example S58 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0709] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00138 Mixture M58 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M59

[0710] A nematic LC medium is formulated as follows:

TABLE-US-00139 Composition Conc., Nr. Comp. wt.-% Properties 1 APUQU-3-F 2.0 T(N, I) = 100.4 C. 2 BCH-32 4.0 n (589 nm, 20 C.): = 0.1113 3 CC-3-V 22.5 .sub. (1 kHz, 20 C.): = 8.8 4 CC-3-V1 8.0 .sub. (1 kHz, 20 C.): = 2.9 5 CCP-3-1 7.0 (1 kHz, 20 C.): = 5.8 6 CCP-3-3 5.0 .sub.1 (20 C.): = 99 mPa .Math. s 7 CCP-V-1 12.0 K.sub.1 (20 C.): = 17.6 pN 8 CCP-V2-1 0.5 K.sub.3 (20 C.): = 18.7 pN 9 CCPC-33 2.5 V.sub.0 (20 C.): = 1.82 V 10 CLP-3-T 6.5 11 CLU-3-F 2.0 12 PCH-302 10.0 13 PGU-2-F 6.0 14 PGUQU-3-F 3.0 15 PGUQU-4-F 5.0 16 PGUQU-5-F 4.0

Mixture Example S59 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0711] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00140 Mixture M59 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M60

[0712] A nematic LC medium is formulated as follows:

TABLE-US-00141 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 7.5 T(N, I) = 101 C. 2 CC-3-V 27.0 n (589 nm, 20 C.): = 0.1115 3 CCG-V-F 4.0 .sub. (1 kHz, 20 C.): = 8.6 4 CCP-3-1 7.0 .sub. (1 kHz, 20 C.): = 2.8 5 CCP-3-3 5.0 (1 kHz, 20 C.): = 5.8 6 CCP-V-1 8.0 .sub.1 (20 C.): = 98 mPa .Math. s 7 CCPC-33 3.0 K.sub.1 (20 C.): = 17.5 pN 8 CDUQU-3-F 1.0 K.sub.3 (20 C.): = 18.5 pN 9 CLU-3-F 20.0 V.sub.0 (20 C.): = 1.82 V 10 DGUQU-4-F 1.0 11 PGUQU-3-F 3.0 12 PGUQU-4-F 2.5 13 PGUQU-5-F 3.5 14 PP-1-2V1 7.5

Mixture Example S60 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0713] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00142 Mixture M60 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M61

[0714] A nematic LC medium is formulated as follows:

TABLE-US-00143 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 8.5 T(N, I) = 100.2 C. 2 BCH-5F.F.F 3.5 n (589 nm, 20 C.): = 0.1119 3 CC-3-V 32.5 .sub. (1 kHz, 20 C.): = 8.5 4 CCP-3-1 10.0 .sub. (1 kHz, 20 C.): = 2.8 5 CCP-V-1 2.0 (1 kHz, 20 C.): = 5.7 6 CCPC-33 2.5 .sub.1 (20 C.): = 100 mPa .Math. s 7 CCPC-35 4.0 K.sub.1 (20 C.): = 17.4 pN 8 CLU-3-F 19.0 K.sub.3 (20 C.): = 17.7 pN 9 PGUQU-3-F 8.0 V.sub.0 (20 C.): = 1.83 V 10 PGUQU-4-F 2.5 11 PP-1-2V1 7.5

Mixture Example S61 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0715] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00144 Mixture M61 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M62

[0716] A nematic LC medium is formulated as follows:

TABLE-US-00145 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 9.0 T(N, I) = 102.8 C. 2 CC-3-V 30.0 n (589 nm, 20 C.): = 0.1117 3 CC-3-V1 1.0 .sub. (1 kHz, 20 C.): = 8.6 4 CCP-3-1 10.0 .sub. (1 kHz, 20 C.): = 2.8 5 CCP-V-1 10.5 (1 kHz, 20 C.): = 5.8 6 CCPC-33 3.0 .sub.1 (20 C.): = 97 mPa .Math. s 7 CLU-3-F 20.0 K.sub.1 (20 C.): = 17.5 pN 8 PGUQU-3-F 5.0 K.sub.3 (20 C.): = 18.5 pN 9 PGUQU-4-F 7.0 V.sub.0 (20 C.): = 1.81 V 11 PP-1-2V1 4.5

Mixture Example S62 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0717] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00146 Mixture M62 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Mixture Example S62a (Stabilised with Compounds of Formulae ST-2-3 and H-3-7)

[0718] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00147 Mixture M62 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-7 1000 ppm [00677]H-3-7

Mixture Example S62b (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0719] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00148 Mixture M62 99.925 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 250 ppm

Mixture Example S62c (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0720] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00149 Mixture M62 99.9 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 500 ppm

Mixture Example S62d (Stabilised with Compounds of Formulae ST-2-3 and H-3-22)

[0721] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00150 Mixture M62 99.925 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-22 250 ppm [00678]H-3-22

Mixture Example S62e (Stabilised with Compounds of Formulae ST-2-3 and H-3-22)

[0722] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00151 Mixture M62 99.9 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-22 500 ppm

Mixture Example S62f (Stabilised with Compounds of Formulae ST-2-3 and H-3-22)

[0723] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00152 Mixture M62 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-22 1000 ppm

Mixture Example S62q (Stabilised with Compounds of Formulae ST-2-3 and H-3-23)

[0724] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00153 Mixture M62 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-23 1000 ppm [00679]H-3-23

Mixture Example S62h (Stabilised with Compound of Formulae ST-2-3

[0725] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00154 Mixture M62 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Mixture Example S62i (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0726] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00155 Mixture M62 99.875 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 750 ppm

Example M63

[0727] A nematic LC medium is formulated as follows:

TABLE-US-00156 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 9.0 T(N, I) = 103.1 C. 2 CC-3-V 30.0 n (589 nm, 20 C.): = 0.1101 3 CC-3-V1 1.0 .sub. (1 kHz, 20 C.): = 8.6 4 CCP-3-1 10.0 .sub. (1 kHz, 20 C.): = 2.8 5 CCP-V-1 10.5 (1 kHz, 20 C.): = 5.8 6 CCPC-33 3.0 .sub.1 (20 C.): = 105 mPa .Math. s 7 CLU-3-F 20.0 K.sub.1 (20 C.): = 17.4 pN 8 PGUQU-3-F(1) 5.0 K.sub.3 (20 C.): = 18.6 pN 9 PGUQU-4-F(1) 7.0 V.sub.0 (20 C.): = 1.81 V 11 PP-1-2V1 4.5

Mixture Example S63 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0728] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00157 Mixture M63 99.875 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 750 ppm

Mixture Example S63a (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0729] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00158 Mixture M63 99.9 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 500 ppm

Mixture Example S63b (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0730] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00159 Mixture M63 99.925 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 250 ppm

Mixture Example S63c (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0731] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00160 Mixture M63 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Mixture Example S63d (Stabilised with Compound of Formulae ST-2-3)

[0732] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00161 Mixture M63 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Mixture Example S63e (Stabilised with Compounds of Formulae ST-2-3 and H-3-23)

[0733] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00162 Mixture M63 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-23 1000 ppm

Mixture Example S63f (Stabilised with Compounds of Formulae ST-2-3 and H-3-22)

[0734] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00163 Mixture M63 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-22 1000 ppm

Mixture Example S63q (Stabilised with Compounds of Formulae ST-2-3 and H-3-22)

[0735] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00164 Mixture M63 99.9 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-22 500 ppm

Mixture Example S63h (Stabilised with Compounds of Formulae ST-2-3 and H-3-22)

[0736] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00165 Mixture M63 99.925 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-22 250 ppm

Mixture Example S63i (Stabilised with Compounds of Formulae ST-2-3 and H-3-7)

[0737] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00166 Mixture M63 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-7 1000 ppm

Example M64

[0738] A nematic LC medium is formulated as follows:

TABLE-US-00167 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 8.0 T(N, I) = 105.5 C. 2 BCH-5F.F.F 4.0 n (589 nm, 20 C.): = 0.1114 3 CC-3-V 27.0 .sub. (1 kHz, 20 C.): = 8.7 4 CC-3-V1 5.0 .sub. (1 kHz, 20 C.): = 2.8 5 CCP-3-1 10.0 (1 kHz, 20 C.): = 5.9 6 CCP-30CF3 8.0 .sub.1 (20 C.): = 97 mPa .Math. s 7 CCP-V-1 9.5 K.sub.1 (20 C.): = 17.7 pN 8 CCPC-33 2.5 K.sub.3 (20 C.): = 18.6 pN 9 CLU-3-F 9.0 V.sub.0 (20 C.): = 1.81 V 10 PGU-2-F 3.0 11 PGUQU-3-F 5.0 12 PGUQU-4-F 5.0 13 PGUQU-5-F 1.5 14 PP-1-2V1 2.5

Mixture Example S64 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0739] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00168 Mixture M64 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M65

[0740] A nematic LC medium is formulated as follows:

TABLE-US-00169 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 7.5 T(N, I) = 102.3 C. 2 CC-3-V 27.0 n (589 nm, 20 C.): = 0.1115 3 CC-3-V1 4.0 .sub. (1 kHz, 20 C.): = 8.5 4 CCP-3-1 10.0 .sub. (1 kHz, 20 C.): = 2.8 5 CCP-3-3 4.5 (1 kHz, 20 C.): = 5.8 6 CCP-V-1 7.0 .sub.1 (20 C.): = 99 mPa .Math. s 7 CCPC-33 2.5 K.sub.1 (20 C.): = 18.5 pN 8 CLU-3-F 20.0 K.sub.3 (20 C.): = 18.1 pN 9 PGUQU-3-F 4.0 V.sub.0 (20 C.): = 1.85 V 10 PGUQU-4-F 6.0 11 PGUQU-5-F 2.0 12 PP-1-2V1 5.5

Mixture Example S65 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0741] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00170 Mixture M65 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M66

[0742] A nematic LC medium is formulated as follows:

TABLE-US-00171 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 4.0 T(N, I) = 103.3 C. 2 CC-3-V 24.5 n (589 nm, 20 C.): = 0.1118 3 CC-3-V1 7.0 .sub. (1 kHz, 20 C.): = 8.6 4 CCP-3-1 5.5 .sub. (1 kHz, 20 C.): = 2.8 5 CCP-3-3 5.0 (1 kHz, 20 C.): = 5.8 6 CCP-V-1 13.0 .sub.1 (20 C.): = 99 mPa .Math. s 7 CCP-V2-1 3.0 K.sub.1 (20 C.): = 17.5 pN 8 CCPC-33 3.0 K.sub.3 (20 C.): = 18.9 pN 9 CLU-3-F 15.0 V.sub.0 (20 C.): = 1.82 V 10 PGU-2-F 2.0 11 PGU-3-F 4.0 12 PGUQU-3-F 3.0 13 PGUQU-4-F 4.0 14 PGUQU-5-F 3.0 15 PP-1-2V1 4.0

Mixture Example S66 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0743] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00172 Mixture M66 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M67

[0744] A nematic LC medium is formulated as follows:

TABLE-US-00173 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 4.0 T(N, I) = 102.8 C. 2 CC-3-V 24.5 n (589 nm, 20 C.): = 0.1123 3 CC-3-V1 7.5 .sub. (1 kHz, 20 C.): = 8.6 4 CCP-3-1 5.0 .sub. (1 kHz, 20 C.): = 2.8 5 CCP-3-3 5.0 (1 kHz, 20 C.): = 5.8 6 CCP-V-1 13.0 .sub.1 (20 C.): = 99 mPa .Math. s 7 CCP-V2-1 3.0 K.sub.1 (20 C.): = 17.4 pN 8 CCPC-33 3.0 K.sub.3 (20 C.): = 18.8 pN 9 CLU-3-F 15.0 V.sub.0 (20 C.): = 1.82 V 10 PGU-2-F 2.0 11 PGU-3-F 4.0 12 PGUQU-3-F 3.0 13 PGUQU-4-F 4.0 14 PGUQU-5-F 3.0 15 PP-1-2V1 4.0

Mixture Example S67 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0745] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00174 Mixture M67 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M68

[0746] A nematic LC medium is formulated as follows:

TABLE-US-00175 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 6.0 T(N, I) = C. 2 CC-3-V 17.5 n (589 nm, 20 C.): = 3 CC-3-V1 8.0 .sub. (1 kHz, 20 C.): = 4 CCH-301 8.0 .sub. (1 kHz, 20 C.): = 5 CCP-3-1 6.0 (1 kHz, 20 C.): = 6 CCP-30CF3 7.5 .sub.1 (20 C.): = mPa .Math. s 7 CCP-V-1 13.0 K.sub.1 (20 C.): = pN 8 CLP-3-T 5.0 K.sub.3 (20 C.): = pN 9 CLU-3-F 13.5 V.sub.0 (20 C.): = V 10 PGP-2-4 3.5 11 PGU-2-F 1.5 12 PGUQU-3-F 5.0 13 PGUQU-4-F 4.5 14 PPGU-3-F 1.0

Mixture Example S68 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0747] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00176 Mixture M68 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Mixture Example S68a (Stabilised with Compound of Formulae ST-2-3)

[0748] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00177 Mixture M68 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Example M69

[0749] A nematic LC medium is formulated as follows:

TABLE-US-00178 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 9.0 T(N, I) = C. 2 CC-3-V 14.0 n (589 nm, 20 C.): = 3 CC-3-V1 8.0 .sub. (1 kHz, 20 C.): = 4 CCH-301 8.0 .sub. (1 kHz, 20 C.): = 5 CCH-35 5.0 (1 kHz, 20 C.): = 6 CCP-3-1 7.0 .sub.1 (20 C.): = mPa .Math. s 7 CCP-30CF3 8.0 K.sub.1 (20 C.): = pN 8 CCP-V-1 13.0 K.sub.3 (20 C.): = pN 9 CLP-3-T 5.5 V.sub.0 (20 C.): = V 10 CLU-3-F 5.0 11 PGP-2-4 0.5 12 PGU-2-F 6.0 13 PGUQU-3-F 5.0 14 PGUQU-4-F 5.0 15 PPGU-3-F 1.0

Mixture Example S69 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0750] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00179 Mixture M69 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Mixture Example S69a (Stabilised with Compound of Formulae ST-2-3)

[0751] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00180 Mixture M69 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Example M70

[0752] A nematic LC medium is formulated as follows:

TABLE-US-00181 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 9.0 T(N, I) = C. 2 CC-3-V 19.5 n (589 nm, 20 C.): = 3 CC-3-V1 5.0 .sub. (1 kHz, 20 C.): = 4 CCH-23 5.0 .sub. (1 kHz, 20 C.): = 5 CCH-34 2.0 (1 kHz, 20 C.): = 6 CCH-35 1.0 .sub.1 (20 C.): = mPa .Math. s 7 CCP-3-1 7.0 K.sub.1 (20 C.): = pN 8 CCP-30CF3 3.0 K.sub.3 (20 C.): = pN 9 CCP-V-1 10.0 V.sub.0 (20 C.): = V 10 CCPC-33 2.0 11 CDUQU-3-F 7.0 12 CLP-3-T 5.0 13 CLU-3-F 10.0 14 PGP-2-4 5.5 15 PGU-2-F 6.5 16 PGUQU-3-F 2.5

Mixture Example S70 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0753] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00182 Mixture M70 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Mixture Example S70a (Stabilised with Compound of Formulae ST-2-3)

[0754] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00183 Mixture M70 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Example M71

[0755] A nematic LC medium is formulated as follows:

TABLE-US-00184 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 3.5 T(N, I)= 100.9 C. 2 CC-3-V 25.5 n (589 nm, 20 C.):= 0.1104 3 CC-3-V1 8.0 .sub. (1 kHz, 20 C.):= 8.5 4 CCP-3-1 5.0 .sub. (1 kHz, 20 C.):= 2.8 5 CCP-3-3 5.0 (1 kHz, 20 C.):= 5.7 6 CCP-V-1 13.0 1 (20 C.):= mPa .Math. s 7 CCP-V2-1 2.0 K.sub.1 (20 C.):= 17.1 pN 8 CCPC-33 3.0 K.sub.3 (20 C.):= 18.4 pN 9 CLU-3-F 15.0 V.sub.0 (20 C.):= 1.81 V 10 PGU-2-F 2.5 11 PGU-3-F 3.5 12 PGUQU-3-F 3.0 13 PGUQU-4-F 4.0 14 PGUQU-5-F 3.0 15 PP-1-2V1 4.0

Mixture Example S71 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0756] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00185 Mixture M71 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Mixture Example S71a (Stabilised with Compound of Formulae ST-2-3)

[0757] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00186 Mixture M71 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Example M72

[0758] A nematic LC medium is formulated as follows:

TABLE-US-00187 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 9.0 T(N, I)= 101.6 C. 2 CC-3-V 25.0 n (589 nm, 20 C.):= 0.1091 3 CC-3-V1 4.0 .sub. (1 kHz, 20 C.):= 8.5 4 CCP-301 8.0 .sub. (1 kHz, 20 C.):= 3.0 5 CCP-35 2.0 (1 kHz, 20 C.):= 5.5 6 CCP-30CF3 6.5 1 (20 C.):= 95 mPa .Math. s 7 CCP-V-1 3.5 K.sub.1 (20 C.):= 17.3 pN 8 CCP-V2-1 5.5 K.sub.3 (20 C.):= 16.8 pN 9 CCPC-33 2.5 V.sub.0 (20 C.):= 1.85 V 10 CLU-3-F 13.5 11 CPGP-4-3 1.5 12 CPGP-5-3 1.0 13 DGUQU-4-F 4.5 14 DPGU-4-F 4.0 15 PGP-2-2V 3.0 16 PGUQU-3-F 2.0 17 PGUQU-4-F 1.0 18 PP-1-2V1 3.0 19 PPGU-3-F 0.5

Mixture Example S72 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0759] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00188 Mixture M72 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Mixture Example S72a (Stabilised with Compound of Formulae ST-2-3)

[0760] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00189 Mixture M72 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Example M73

[0761] A nematic LC medium is formulated as follows:

TABLE-US-00190 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 9.0 T(N, I)= 103.4 C. 2 CC-3-V 25.5 n (589 nm, 20 C.):= 0.1124 3 CC-3-V1 1.5 .sub. (1 kHz, 20 C.):= 8.7 4 CCP-35 1.0 .sub. (1 kHz, 20 C.):= 2.8 5 CCP-3-1 7.0 (1 kHz, 20 C.):= 5.9 6 CCP-30CF3 6.5 1 (20 C.):= 96 mPa .Math. s 7 CCP-V-1 10.0 K.sub.1 (20 C.):= 19.0 pN 8 CCPC-33 2.5 K.sub.3 (20 C.):= 18.4 pN 9 CDUQU-3-F 7.0 V.sub.0 (20 C.):= 1.88 V 10 CLU-3-F 14.5 11 PGP-2-4 2.0 12 PGU-2-F 1.5 13 PGUQU-3-F 3.0 14 PGUQU-4-F 2.0 15 PP-1-2V1 7.0

Mixture Example S73 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0762] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00191 Mixture M73 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Mixture Example S73a (Stabilised with Compound of Formulae ST-2-3)

[0763] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00192 Mixture M73 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Example M74

[0764] A nematic LC medium is formulated as follows:

TABLE-US-00193 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 9.0 T(N, I)= C. 2 CC-3-V 25.0 n (589 nm, 20 C.):= 3 CCP-3-1 4.5 .sub. (1 kHz, 20 C.):= 4 CCP-3-3 4.0 .sub. (1 kHz, 20 C.):= 5 CCP-V-1 13.0 (1 kHz, 20 C.):= 6 CCPC-33 1.0 1 (20 C.):= mPa .Math. s 7 CDUQU-3-F 7.0 K.sub.1 (20 C.):= pN 8 CLP-3-T 5.0 K.sub.3 (20 C.):= pN 9 CLU-3-F 13.0 V.sub.0 (20 C.):= V 10 PCH-302 7.0 11 PGP-2-3 3.0 12 PGU-2-F 1.5 13 PGUQU-3-F 2.5 14 PGUQU-4-F 2.5 15 PP-1-2V1 2.0

Mixture Example S74 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0765] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00194 Mixture M74 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Mixture Example S74a (Stabilised with Compound of Formulae ST-2-3)

[0766] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00195 Mixture M74 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Example M75

[0767] A nematic LC medium is formulated as follows:

TABLE-US-00196 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 6.5 T(N, I)= C. 2 CC-3-V 25.0 n (589 nm, 20 C.):= 0.1104 3 CCP-3-V1 9.0 .sub. (1 kHz, 20 C.):= 8.6 4 CCG-V-F 3.0 .sub. (1 kHz, 20 C.):= 2.8 5 CCP-3-1 5.0 (1 kHz, 20 C.):= 5.8 6 CCP-3-3 5.0 1 (20 C.):= mPa .Math. s 7 CCP-V-1 7.5 K.sub.1 (20 C.):= 17.2 pN 8 CCP-V2-1 2.0 K.sub.3 (20 C.):= 18.2 pN 9 CCPC-33 3.0 V.sub.0 (20 C.):= 1.82 V 10 CLU-3-F 15.0 11 PGU-2-F 1.0 12 PGU-3-F 3.0 13 PGUQU-3-F 3.0 14 PGUQU-4-F 4.0 15 PGUQU-5-F 4.0 16 PP-1-2V1 4.0

Mixture Example S75 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0768] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00197 Mixture M75 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M76

[0769] A nematic LC medium is formulated as follows:

TABLE-US-00198 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 7.0 T(N, I) = 102.2 C. 2 CC-3-V 28.0 n (589 nm, 20 C.): = 0.1109.sup. 3 CC-3-V1 2.5 .sub. (1 kHz, 20 C.): = 8.5.sup. 4 CCP-3-1 10.0 (1 kHz, 20 C.): = 2.8 5 CCP-3-3 3.5 (1 kHz, 20 C.): = 5.8 6 CCP-V-1 8.0 .sup..sub.1 (20 C.): = 99 mPa .Math. s 7 CCP-V2-1 1.0 K.sub.1 (20 C.): = 17.7 pN 8 CCPC-33 2.5 K.sub.3 (20 C.): = 18.4 pN 9 CLU-3-F 20.0 V.sub.0 (20 C.): = 1.84 V 10 PGUQU-3-F 4.0 11 PGUQU-4-F 6.0 12 PGUQU-5-F 2.0 13 PP-1-2V1 5.5

Mixture Example S76 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0770] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00199 Mixture M76 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M77

[0771] A nematic LC medium is formulated as follows:

TABLE-US-00200 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 7.5 T(N, I) = 100.9 C. 2 CC-3-V 28.5 n (589 nm, 20 C.): = 0.1116.sup. 3 CC-3-V1 1.0 .sub. (1 kHz, 20 C.): = 8.6.sup. 4 CCP-3-1 10.0 (1 kHz, 20 C.): = 2.8 5 CCP-3-3 5.0 (1 kHz, 20 C.): = 5.8 6 CCP-V-1 8.0 .sup..sub.1 (20 C.): = 94 mPa .Math. s 7 CCPC-33 2.0 K.sub.1 (20 C.): = 17.7 pN 8 CLU-3-F 20.0 K.sub.3 (20 C.): = 18.1 pN 9 PGUQU-3-F 4.0 V.sub.0 (20 C.): = 1.83 V 10 PGUQU-4-F 6.0 11 PGUQU-5-F 2.0 12 PP-1-2V1 6.0

Mixture Example S77 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0772] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00201 Mixture M77 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M78

[0773] A nematic LC medium is formulated as follows:

TABLE-US-00202 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 9.0 T(N, I) = 101.8 C. 2 CC-3-V 24.5 n (589 nm, 20 C.): = 0.1116.sup. 3 CC-3-V1 7.0 .sub. (1 kHz, 20 C.): = 8.7.sup. 4 CCP-3-1 10.0 (1 kHz, 20 C.): = 2.8 5 CCP-3-3 5.0 (1 kHz, 20 C.): = 6.0 6 CCP-V-1 7.0 .sup..sub.1 (20 C.): = 94 mPa .Math. s 7 CCPC-33 1.0 K.sub.1 (20 C.): = 18.1 pN 8 CLU-3-F 20.0 K.sub.3 (20 C.): = 18.3 pN 9 PGU-2-F 1.5 V.sub.0 (20 C.): = 1.83 V 10 PGUQU-3-F 4.0 LTS (20 C.) 936 h 11 PGUQU-4-F 6.0 12 PGUQU-5-F 1.5 13 PP-1-2V1 3.5

Mixture Example S78 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0774] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00203 Mixture M78 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M79

[0775] A nematic LC medium is formulated as follows:

TABLE-US-00204 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 7.5 T(N, I) = 104.9 C. 2 CC-3-V 24.0 n (589 nm, 20 C.): = 0.1117.sup. 3 CC-3-V1 8.0 .sub. (1 kHz, 20 C.): = 8.6.sup. 4 CCP-3-1 7.0 (1 kHz, 20 C.): = 2.8 5 CCP-3-3 5.0 (1 kHz, 20 C.): = 5.8 6 CCP-V-1 13.5 .sup..sub.1 (20 C.): = 99 mPa .Math. s 7 CCPC-33 2.0 K.sub.1 (20 C.): = 17.6 pN 8 CLU-3-F 16.0 K.sub.3 (20 C.): = 18.5 pN 9 PGU-2-F 5.0 V.sub.0 (20 C.): = 1.82 V 10 PGU-3-F 0.5 11 PGUQU-3-F 3.0 12 PGUQU-4-F 4.0 13 PGUQU-5-F 3.0 14 PP-1-2V1 1.5

Mixture Example S79 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0776] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00205 Mixture M79 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M80

[0777] A nematic LC medium is formulated as follows:

TABLE-US-00206 Composition Conc., Nr. Comp. wt.-% Properties 1 APUQU-3-F 2.0 T(N, I) = C. 2 BCH-32 9.0 n (589 nm, 20 C.): =.sup. 3 CC-3-V 19.5 .sub. (1 kHz, 20 C.): =.sup. 4 CC-3-V1 10.0 (1 kHz, 20 C.): =.sup. 5 CCP-3-1 7.0 (1 kHz, 20 C.): = 6 CCP-V-1 14.0 .sup..sub.1 (20 C.): = mPa .Math. s 7 CCPC-33 1.0 K.sub.1 (20 C.): = pN 8 CLP-3-T 2.5 K.sub.3 (20 C.): = pN 9 CLU-3-F 11.5 V.sub.0 (20 C.): = V 10 PCH-302 10.0 11 PGUQU-3-F 3.0 12 PGUQU-4-F 4.5 13 PGUQU-5-F 6.0

Mixture Example S80 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0778] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00207 Mixture M80 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M81

[0779] A nematic LC medium is formulated as follows:

TABLE-US-00208 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 9.0 T(N, I) = 102.4 C. 2 CC-3-V 25.5 n (589 nm, 20 C.): = 0.1111.sup. 3 CC-3-V1 6.0 .sub. (1 kHz, 20 C.): = 8.5.sup. 4 CCP-3-1 10.0 (1 kHz, 20 C.): = 2.7 5 CCP-3-3 5.0 (1 kHz, 20 C.): = 5.8 6 CCP-V-1 6.5 .sup..sub.1 (20 C.): = 97 mPa .Math. s 7 CCPC-33 1.5 K.sub.1 (20 C.): = 18.3 pN 8 CLU-3-F 20.0 K.sub.3 (20 C.): = 18.5 pN 9 PGUQU-3-F 4.0 V.sub.0 (20 C.): = 1.87 V 10 PGUQU-4-F 6.0 11 PGUQU-5-F 2.0 12 PP-1-2V1 4.5

Mixture Example S81 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0780] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00209 Mixture M81 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 1000 ppm

Example M82

[0781] A nematic LC medium is formulated as follows:

TABLE-US-00210 Composition Conc., Nr. Comp. wt.-% Properties 1 APUQU-3-F 5.0 .sup.T(N, I) = 79.6 C. 2 CC-3-V 37.5 n (589 nm, 20 C.): = 0.1099 3 CCP-3-1 10.0 .sub. (1 kHz, 20 C.): = 15.3 4 CCP-3-3 1.0 (1 kHz, 20 C.): = 3.6 5 CCP-30CF3 1.0 (1 kHz, 20 C.): = 11.7.sup. 6 CCP-3F.F.F 1.0 .sup..sub.1 (20 C.): = 79 mPa .Math. s 7 CCP-V-1 3.5 .sup.K.sub.1 (20 C.): = 12.2 pN 8 CCPC-33 2.0 .sup.K.sub.3 (20 C.): = 13.4 pN 9 CLU-3-F 5.5 .sup.V.sub.0 (20 C.): = 1.07 V 10 DGUQU-4-F 0.5 11 PGU-2-F 4.5 12 PGUQU-3-F 5.0 13 PGUQU-4-F 7.0 14 PGUQU-5-F 4.0 15 PUQU-3-F 12.5

Mixture Example S82 (Stabilised with Compound of Formula ST-2-3)

[0782] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00211 Mixture M82 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Example M83

[0783] A nematic LC medium is formulated as follows:

TABLE-US-00212 Composition Conc., Nr. Comp. wt.-% Properties 1 APUQU-3-F 5.5 .sup.T(N, I) = 76.3 C. 2 CC-3-V 35.0 n (589 nm, 20 C.): = 0.1097 3 CC-3-V1 4.5 .sub. (1 kHz, 20 C.): = 15.2 4 CCP-3-1 7.0 (1 kHz, 20 C.): = 3.5 5 CCP-30CF3 5.5 (1 kHz, 20 C.): = 11.7.sup. 6 CLP-3-T 1.0 .sup..sub.1 (20 C.): = 76 mPa .Math. s 7 CLU-3-F 11.0 .sup.K.sub.1 (20 C.): = 12.2 pN 8 PGU-2-F 5.0 .sup.K.sub.3 (20 C.): = 13.1 pN 9 PGU-3-F 1.0 .sup.V.sub.0 (20 C.): = 1.07 V 10 PGUQU-3-F 5.5 11 PGUQU-4-F 7.5 12 PGUQU-5-F 2.5 13 PPGU-3-F 1.0 14 PUQU-3-F 8.0

Mixture Example S83 (Stabilised with Compound of Formula ST-2-3)

[0784] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00213 Mixture M83 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Example M84

[0785] A nematic LC medium is formulated as follows:

TABLE-US-00214 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 6.5 T(N, I) = 100 C. 2 CC-3-V1 11.5 n (589 nm, 20 C.): = 0.1109.sup. 3 CCG-V-F 2.0 .sub. (1 kHz, 20 C.): = 8.8.sup. 4 CCH-23 7.0 (1 kHz, 20 C.): = 2.9 5 CCH-301 7.0 (1 kHz, 20 C.): = 5.8 6 CCP-3-1 7.0 .sub.1 (20 C.): = 103 mPa .Math. s 7 CCP-30CF3 8.0 K.sub.1 (20 C.): = 17.6 pN 8 CCP-V-1 13.5 K.sub.3 (20 C.): = 18.1 pN 9 CLU-3-F 14.0 V.sub.0 (20 C.): = 1.82 V 10 CPGP-4-3 1.0 LTS (20 C.) 1000 h 11 PCH-302 7.0 12 PGUQU-3-F 7.0 13 PGUQU-4-F 5.5 14 PP-1-2V1 3.0

Mixture Example S84 (Stabilised with Compound of Formula ST-2-3)

[0786] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00215 Mixture M84 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Mixture Example S84a (Stabilised with Compounds of Formulae ST-2-3 and H-3-22)

[0787] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00216 Mixture M84 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-22 1000 ppm

Mixture Example S84b (Stabilised with Compounds of Formulae ST-2-3 and H-3-22)

[0788] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00217 Mixture M84 99.925 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-22 250 ppm

Example M85

[0789] A nematic LC medium is formulated as follows:

TABLE-US-00218 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 6.5 T(N, I) = 100.5 C. 2 CC-3-V1 11.5 n (589 nm, 20 C.): = 0.1092.sup. 3 CCG-V-F 2.0 .sub. (1 kHz, 20 C.): = 8.8.sup. 4 CCH-23 7.0 (1 kHz, 20 C.): = 2.9 5 CCH-301 7.0 (1 kHz, 20 C.): = 5.8 6 CCP-3-1 7.0 .sub.1 (20 C.): = 112 mPa .Math. s 7 CCP-30CF3 8.0 K.sub.1 (20 C.): = 17.5 pN 8 CCP-V-1 13.5 K.sub.3 (20 C.): = 18.1 pN 9 CLU-3-F 14.0 V.sub.0 (20 C.): = 1.82 V 10 CPGP-4-3 1.0 LTS (20 C.) 1000 h 11 PCH-302 7.0 12 PGUQU-3-F(1) 7.0 13 PGUQU-4-F(1) 5.5 14 PP-1-2V1 3.0

Mixture Example S85 (Stabilised with Compound of Formula ST-2-3)

[0790] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00219 Mixture M85 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Mixture Example S85a (Stabilised with Compounds of Formulae ST-2-3 and H-3-22)

[0791] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00220 Mixture M85 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-22 1000 ppm

Mixture Example S85b (Stabilised with Compounds of Formulae ST-2-3 and H-3-22)

[0792] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00221 Mixture M85 99.925 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-22 250 ppm

TABLE-US-00222 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 6.0 T (N, I) = 80.5 C. 2 CC-3-V 41.0 n (589 nm, 20 C.): = 0.1120 3 CC-3-V1 6.0 .sub. (1 kHz, 20 C.): = 10.1 4 CCP-3-1 5.0 .sub. (1 kHz, 20 C.): = 3.3 5 CLU-3-F 10.0 (1 kHz, 20 C.): = 6.8 6 PGP-2-3 5.0 .sub.1 (20 C.): = 62 mPa .Math. s 7 PGP-2-4 2.0 K.sub.1 (20 C.): = 13.2 pN 8 PGUQU-3-F 5.0 K.sub.3 (20 C.): = 13.4 pN 9 PGUQU-4-F 6.0 V.sub.0 (20 C.): = 1.47 V 10 PGUQU-5-F 4.5 11 PPGU-(c5)-F 1.0 12 PUQU-3-F 6.0 13 CCP-3-3 2.5 [00680]PPGU-(c5)-F

Example M86

[0793] A nematic LC medium is formulated as follows:

TABLE-US-00223 Mixture M86 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Example M87

[0794] A nematic LC medium is formulated as follows:

TABLE-US-00224 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 6.0 T (N, I) = 80.5 C. 2 CC-3-V 41.0 n (589 nm, 20 C.): = 0.1119 3 CC-3-V1 6.0 .sub. (1 kHz, 20 C.): = 10.1 4 CCP-3-1 5.0 .sub. (1 kHz, 20 C.): = 3.3 5 CLU-3-F(1) 10.0 (1 kHz, 20 C.): = 6.8 6 PGP-2-3 5.0 .sub.1 (20 C.): = 66 mPa .Math. s 7 PGP-2-4 2.0 K.sub.1 (20 C.): = 13.1 pN 8 PGUQU-3-F 5.0 K.sub.3 (20 C.): = 13.4 pN 9 PGUQU-4-F 6.0 10 PGUQU-5-F 4.5 11 PPGU-3-F 1.0 12 PUQU-3-F 6.0 13 CCP-3-3 2.5 [00681]CLU-3-F(1)

Mixture Example S87 (Stabilised with Compounds of Formulae ST-2-3)

[0795] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00225 Mixture M87 99.95 wt.-% Compound of Formula ST-2-3 500 ppm

Example M88

[0796] A nematic LC medium is formulated as follows:

TABLE-US-00226 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 6.0 T (N, I) = 81 C. 2 CC-3-V 41.0 n (589 nm, 20 C.): = 0.1098 3 CC-3-V1 6.0 .sub. (1 kHz, 20 C.): = 10.0 4 CCP-3-1 5.0 .sub. (1 kHz, 20 C.): = 3.3 5 CLU-3-F 10.0 (1 kHz, 20 C.): = 6.7 6 PGP-2-3 5.0 .sub.1 (20 C.): = 63 mPa .Math. s 7 PGP-2-4 2.0 K.sub.1 (20 C.): = 13.1 pN 8 PGUQU-3-F 5.0 K.sub.3 (20 C.): = 13.5 pN 9 PGUQU-4-F 6.0 10 APUQU-(c5)-F 4.5 11 PPGU-3-F 1.0 12 PUQU-3-F 6.0 13 CCP-3-3 2.5 [00682]APUQU-(c5)-F

Mixture Example S88 (Stabilised with Compounds of Formulae ST-1-3)

[0797] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00227 Mixture M88 99.97 wt.-% Compound of Formula ST-1-3 300 ppm

Example M89

[0798] A nematic LC medium is formulated as follows:

TABLE-US-00228 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 6.0 T(N, I) = 80.5 C. 2 CC-3-V 41.0 n (589 nm, 20 C.): = 0.1104 3 CC-3-V1 6.0 || (1 kHz, 20 C.): = 9.9 4 CCP-3-1 5.0 (1 kHz, 20 C.): = 3.3 5 CLU-3-F 10.0 (1 kHz, 20 C.): = 6.6 6 PGP-2-3 5.0 .sub.1 (20 C.): = 64 mPas 7 PGP-2-4 2.0 K.sub.1 (20 C.): = 13.6 pN 8 PGUQU-3-F 5.0 K.sub.3 (20 C.): = 13.7 pN 9 PGUQU-4-F 6.0 10 PGUQU-5-F 4.5 11 PPGU-3-F 1.0 12 PUQU-(c5)-F 6.0 13 CCP-3-3 2.5 [00683]PUQU-(c5)-F

Mixture Example S89 (Stabilised with Compounds of Formulae ST-1-3 and H-3-7)

[0799] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00229 Mixture M89 99.85 wt.-% Compound of Formula ST-1-3 500 ppm Compound of Formula H-3-7 1000 ppm

Example M90

[0800] A nematic LC medium is formulated as follows:

TABLE-US-00230 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 6.0 T(N, I) = 80 C. 2 CC-3-V 41.0 n (589 nm, 20 C.): = 0.1091 3 CC-3-V1 6.0 || (1 kHz, 20 C.): = 10.4 4 CCP-3-1 5.0 (1 kHz, 20 C.): = 3.3 5 CLU-3-F 10.0 (1 kHz, 20 C.): = 7.1 6 PGP-2-3 5.0 .sub.1 (20 C.): = 64 mPas 7 PGP-2-4 2.0 K.sub.1 (20 C.): = 12.8 pN 8 PGUQU-3-F 5.0 K.sub.3 (20 C.): = 13.2 pN 9 PGUQU-4-F 6.0 10 DGUQU-(c5)-F 4.5 11 PPGU-3-F 1.0 12 PUQU-3-F 6.0 13 CCP-3-3 2.5 [00684]DGUQU-(c5)-F

Mixture Example S90 (Stabilised with Compounds of Formulae ST-1-3 and H-3-22)

[0801] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00231 Mixture M90 99.85 wt.-% Compound of Formula ST-1-3 500 ppm Compound of Formula H-3-22 1000 ppm

Example M91

[0802] A nematic LC medium is formulated as follows:

TABLE-US-00232 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 6.0 T(N, I) = 83.5 C. 2 CC-3-V 41.0 n (589 nm, 20 C.): = 0.1123 3 CC-3-V1 6.0 || (1 kHz, 20 C.): = 10.0 4 CCP-3-1 5.0 (1 kHz, 20 C.): = 3.3 5 CLU-3-F 10.0 (1 kHz, 20 C.): = 6.7 6 PGP-2-3 5.0 .sub.1 (20 C.): = 65 mPas 7 PGP-2-4 2.0 K.sub.1 (20 C.): = 13.7 pN 8 PGUQU-3-F 5.0 K.sub.3 (20 C.): = 13.4 pN 9 PGUQU-4-F 6.0 10 DPGU-(c5)-F 4.5 11 PPGU-3-F 1.0 12 PUQU-3-F 6.0 13 CCP-3-3 2.5 [00685]DPGU-(c5)-F

Mixture Example S91 (Stabilised with Compounds of Formulae ST-1-3 and H-3-23)

[0803] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00233 Mixture M91 99.85 wt.-% Compound of Formula ST-1-3 500 ppm Compound of Formula H-3-23 1000 ppm

Example M92

[0804] A nematic LC medium is formulated as follows:

TABLE-US-00234 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 6.0 T(N, I) = 82.5 C. 2 CC-3-V 41.0 n (589 nm, 20 C.): = 0.1109 3 CC-3-V1 6.0 || (1 kHz, 20 C.): = 9.9 4 CCP-3-1 5.0 (1 kHz, 20 C.): = 3.3 5 CLU-3-F 10.0 (1 kHz, 20 C.): = 6.6 6 PGP-2-3 5.0 .sub.1 (20 C.): = 66 mPas 7 PGP-2-4 2.0 K.sub.1 (20 C.): = 13.8 pN 8 PGUQU-3-F 5.0 K.sub.3 (20 C.): = 13.4 pN 9 PGUQU-4-F 6.0 10 DLGU-(c5)-F 4.5 11 PPGU-3-F 1.0 12 PUQU-3-F 6.0 13 CCP-3-3 2.5 [00686]DLGU-(c5)-F

Mixture Example S92 (Stabilised with Compounds of Formulae ST-1-3 and H-3-7)

[0805] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00235 Mixture M92 99.85 wt.-% Compound of Formula ST-1-3 500 ppm Compound of Formula H-3-7 1000 ppm

Example M93

[0806] A nematic LC medium is formulated as follows:

TABLE-US-00236 Composition Nr. Comp. Conc., wt.-% Properties 1 BCH-32 6.0 T(N, I) = 79.5 C. 2 CC-3-V 41.0 n (589 nm, 20 C.): = 0.1131 3 CC-3-V1 6.0 .sub. (1 kHz, 20 C.): = 10.1 4 CCP-3-1 5.0 .sub. (1 kHz, 20 C.): = 3.3 5 CLU-3-F 10.0 (1 kHz, 20 C.): = 6.8 6 PUS-3-2 5.0 .sub.1 (20 C.): = 57 mPa .Math. s 7 PGP-2-4 2.0 K.sub.1 (20 C.): = 13.2 pN 8 PGUQU-3-F 5.0 K.sub.3 (20 C.): = 13.3 pN 9 PGUQU-4-F 6.0 10 DUQU-5-F 4.5 11 PPGU-3-F 1.0 12 PUQU-3-F 6.0 13 CCP-3-3 2.5

Mixture Example S93 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0807] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00237 Mixture M93 99.925 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 250 ppm

Example M94

[0808] A nematic LC medium is formulated as follows:

TABLE-US-00238 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 6.0 T(N, I) = 80 C. 2 CC-3-V 41.0 n (589 nm, 20 C.): = 0.1133 3 CC-3-V1 6.0 || (1 kHz, 20 C.): = 10.1 4 CCP-3-1 5.0 (1 kHz, 20 C.): = 3.3 5 CLU-3-F 10.0 (1 kHz, 20 C.): = 6.8 6 PUS-(c5)-2 5.0 .sub.1 (20 C.): = 60 mPas 7 PGP-2-4 2.0 K.sub.1 (20 C.): = 13.1 pN 8 PGUQU-3-F 5.0 K.sub.3 (20 C.): = 13.3 pN 9 PGUQU-4-F 6.0 10 PGUQU-5-F 4.5 11 PPGU-3-F 1.0 12 PUQU-3-F 6.0 13 CCP-3-3 2.5 [00687]PUS-(c5)-2

Mixture Example S94 (Stabilised with Compounds of Formulae ST-1-3 and H-3-1)

[0809] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00239 Mixture M94 99.925 wt.-% Compound of Formula ST-1-3 500 ppm Compound of Formula H-3-1 250 ppm

Example M95

[0810] A nematic LC medium is formulated as follows:

TABLE-US-00240 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 6.0 T(N, I) = 79.5 C. 2 CC-3-V 41.0 n (589 nm, 20 C.): = 0.1123 3 CC-3-V1 6.0 || (1 kHz, 20 C.): = 10.1 4 CCP-3-1 5.0 (1 kHz, 20 C.): = 3.3 5 CLU-3-F 10.0 (1 kHz, 20 C.): = 6.8 6 PUS-3-(c5) 5.0 .sub.1 (20 C.): = 59 mPas 7 PGP-2-4 2.0 K.sub.1 (20 C.): = 13.1 pN 8 PGUQU-3-F 5.0 K.sub.3 (20 C.): = 13.0 pN 9 PGUQU-4-F 6.0 10 PGUQU-5-F 4.5 11 PPGU-3-F 1.0 12 PUQU-3-F 6.0 13 CCP-3-3 2.5 [00688]PUS-3-(c5)

Mixture Example S95 (Stabilised with Compounds of Formulae ST-2-3 and H-3-23)

[0811] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00241 Mixture M95 99.85 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-23 1000 ppm

Example M96

[0812] A nematic LC medium is formulated as follows:

TABLE-US-00242 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 6.0 T(N, I) = 78 C. 2 CC-3-V 41.0 n (589 nm, 20 C.): = 0.1108 3 CC-3-V1 6.0 || (1 kHz, 20 C.): = 10.1 4 CCP-3-1 5.0 (1 kHz, 20 C.): = 3.3 5 CLU-3-F 10.0 (1 kHz, 20 C.): = 6.8 6 PUS-3-1(c5) 5.0 .sub.1 (20 C.): = 59 mPas 7 PGP-2-4 2.0 K.sub.1 (20 C.): = 12.7 pN 8 PGUQU-3-F 5.0 K.sub.3 (20 C.): = 12.5 pN 9 PGUQU-4-F 6.0 10 PGUQU-5-F 4.5 11 PPGU-3-F 1.0 12 PUQU-3-F 6.0 13 CCP-3-3 2.5 [00689]PUS-3-1(c5)

Mixture Example S96 (Stabilised with Compound of Formulae ST-1-3

[0813] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00243 Mixture M96 99.95 wt.-% Compound of Formula ST-1-3 500 ppm

Example M97

[0814] A nematic LC medium is formulated as follows:

TABLE-US-00244 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 6.0 T(N, I) = 79 C. 2 CC-3-V 41.0 n (589 nm, 20 C.): = 0.1123 3 CC-3-V1 6.0 || (1 kHz, 20 C.): = 10.0 4 CCP-3-1 5.0 (1 kHz, 20 C.): = 3.3 5 CLU-3-F 10.0 (1 kHz, 20 C.): = 6.7 6 PUS-3-O(c5) 5.0 .sub.1 (20 C.): = 60 mPas 7 PGP-2-4 2.0 K.sub.1 (20 C.): = 12.9 pN 8 PGUQU-3-F 5.0 K.sub.3 (20 C.): = 12.9 pN 9 PGUQU-4-F 6.0 10 PGUQU-5-F 4.5 11 PPGU-3-F 1.0 12 PUQU-3-F 6.0 13 CCP-3-3 2.5 [00690]PUS-3-O(c5)

Mixture Example S97 (Stabilised with Compound of Formulae ST-2-3

[0815] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00245 Mixture M97 99.96 wt.-% Compound of Formula ST-2-3 400 ppm

Example M98

[0816] A nematic LC medium is formulated as follows:

TABLE-US-00246 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 6.0 T(N, I) = 79.5 C. 2 CC-3-V 41.0 n (589 nm, 20 C.): = 0.1123 3 CC-3-V1 6.0 || (1 kHz, 20 C.): = 10.0 4 CCP-3-1 5.0 (1 kHz, 20 C.): = 3.3 5 CLU-3-F 10.0 (1 kHz, 20 C.): = 6.7 6 PUS-3-O1(c5) 5.0 .sub.1 (20 C.): = 61 mPas 7 PGP-2-4 2.0 K.sub.1 (20 C.): = 12.9 pN 8 PGUQU-3-F 5.0 K.sub.3 (20 C.): = 13.3 pN 9 PGUQU-4-F 6.0 10 PGUQU-5-F 4.5 11 PPGU-3-F 1.0 12 PUQU-3-F 6.0 13 CCP-3-3 2.5 [00691]PUS-3-O1(c5)

Mixture Example S98 (Stabilised with Compound of Formulae ST-4-1

[0817] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00247 Mixture M98 99.96 wt.-% Compound of Formula ST-4-1 400 ppm [00692]ST-4-1

Example M99

[0818] A nematic LC medium is formulated as follows:

TABLE-US-00248 Composition Nr. Comp. Conc., wt.-% Properties 1 BCH-32 6.0 T(N, I) = 81.5 C. 2 CC-3-V 41.0 n (589 nm, 20 C.): = 0.1148 3 CC-3-V1 6.0 .sub. (1 kHz, 20 C.): = 10.1 4 CCP-3-1 5.0 .sub. (1 kHz, 20 C.): = 3.3 5 CLU-3-F 10.0 (1 kHz, 20 C.): = 6.8 6 PGS-2-1 5.0 .sub.1 (20 C.): = 58 mPa .Math. s 7 PGP-2-4 2.0 K.sub.1 (20 C.): = 13.7 pN 8 PGUQU-3-F 5.0 K.sub.3 (20 C.): = 13.5 pN 9 PGUQU-4-F 6.0 10 PGUQU-5-F 4.5 11 PPGU-3-F 1.0 12 PUQU-3-F 6.0 13 CCP-3-3 2.5

Mixture Example S99 (Stabilised with Compound of Formulae ST-4-2

[0819] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00249 Mixture M99 99.96 wt.-% Compound of Formula ST-4-2 400 ppm [00693]ST-4-2

Example M100

[0820] A nematic LC medium is formulated as follows:

TABLE-US-00250 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 6.0 T(N, I) = 81.5 C. 2 CC-3-V 41.0 n (589 nm, 20 C.): = 0.1150 3 CC-3-V1 6.0 || (1 kHz, 20 C.): = 10.1 4 CCP-3-1 5.0 (1 kHz, 20 C.): = 3.3 5 CLU-3-F 10.0 (1 kHz, 20 C.): = 6.8 6 PGS-(c5)-1 5.0 .sub.1 (20 C.): = 61 mPas 7 PGP-2-4 2.0 K.sub.1 (20 C.): = 13.5 pN 8 PGUQU-3-F 5.0 K.sub.3 (20 C.): = 13.4 pN 9 PGUQU-4-F 6.0 10 PGUQU-5-F 4.5 11 PPGU-3-F 1.0 12 PUQU-3-F 6.0 13 CCP-3-3 2.5 [00694]PGS-(c5)-1

Mixture Example S100 (Stabilised with Compounds of Formulae ST-4-2 and H-3-1)

[0821] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00251 Mixture M100 99.85 wt.-% Compound of Formula ST-4-2 500 ppm Compound of Formula H-3-1 1000 ppm

Example M101

[0822] A nematic LC medium is formulated as follows:

TABLE-US-00252 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 6.0 T(N, I) = 81 C. 2 CC-3-V 41.0 n (589 nm, 20 C.): = 0.1141 3 CC-3-V1 6.0 || (1 kHz, 20 C.): = 10.1 4 CCP-3-1 5.0 (1 kHz, 20 C.): = 3.3 5 CLU-3-F 10.0 (1 kHz, 20 C.): = 6.8 6 PGS-2-(c5) 5.0 .sub.1 (20 C.): = 60 mPas 7 PGP-2-4 2.0 K.sub.1 (20 C.): = 13.5 pN 8 PGUQU-3-F 5.0 K.sub.3 (20 C.): = 13.1 pN 9 PGUQU-4-F 6.0 10 PGUQU-5-F 4.5 11 PPGU-3-F 1.0 12 PUQU-3-F 6.0 13 CCP-3-3 2.5 [00695]PGS-2-(c5)

Mixture Example S101 (Stabilised with Compounds of Formulae ST-4-1 and H-3-1)

[0823] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00253 Mixture M101 99.85 wt.-% Compound of Formula ST-4-1 500 ppm Compound of Formula H-3-1 1000 ppm

Example M102

[0824] A nematic LC medium is formulated as follows:

TABLE-US-00254 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 6.0 T(N, I) = 80.5 C. 2 CC-3-V 41.0 n (589 nm, 20 C.): = 0.1139 3 CC-3-V1 6.0 || (1 kHz, 20 C.): = 10.0 4 CCP-3-1 5.0 (1 kHz, 20 C.): = 3.3 5 CLU-3-F 10.0 (1 kHz, 20 C.): = 6.7 6 PUS-2-O(c5) 5.0 .sub.1 (20 C.): = 61 mPas 7 PGP-2-4 2.0 K.sub.1 (20 C.): = 13.3 pN 8 PGUQU-3-F 5.0 K.sub.3 (20 C.): = 13.0 pN 9 PGUQU-4-F 6.0 10 PGUQU-5-F 4.5 11 PPGU-3-F 1.0 12 PUQU-3-F 6.0 13 CCP-3-3 2.5 [00696]PGS-2-O(c5)

Mixture Example S102 (Stabilised with Compounds of Formulae ST-1-3 and H-3-7)

[0825] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00255 Mixture M102 99.85 wt.-% Compound of Formula ST-1-3 500 ppm Compound of Formula H-3-7 1000 ppm

Example M103

[0826] A nematic LC medium is formulated as follows:

TABLE-US-00256 Composition Nr. Comp. Conc., wt.-% Properties 1 BCH-32 6.0 T(N, I) = 81.5 C. 2 CC-3-V 41.0 n (589 nm, 20 C.): = 0.1090 3 CC-3-V1 6.0 .sub. (1 kHz, 20 C.): = 10.2 4 CCP-3-1 5.0 .sub. (1 kHz, 20 C.): = 3.3 5 CLU-3-F 10.0 (1 kHz, 20 C.): = 6.9 6 PGP-2-3 5.0 .sub.1 (20 C.): = 62 mPa .Math. s 7 PGP-2-4 2.0 K.sub.1 (20 C.): = 13.5 pN 8 PGUQU-3-F 5.0 K.sub.3 (20 C.): = 13.4 pN 9 PGUQU-4-F 6.0 10 PGUQU-5-F 4.5 11 PPGU-3-F 1.0 12 DUQU-3-F 6.0 13 CCP-3-3 2.5

Mixture Example S103 (Stabilised with Compounds of Formulae ST-4-1 and H-3-7)

[0827] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00257 Mixture M103 99.85 wt.-% Compound of Formula ST-4-1 500 ppm Compound of Formula H-3-7 1000 ppm

Example M104

[0828] A nematic LC medium is formulated as follows:

TABLE-US-00258 Composition Conc., Nr. Comp. wt.-% Properties 1 BCH-32 6.0 T(N, I) = 81.5 C. 2 CC-3-V 41.0 n (589 nm, 20 C.): = 0.1088 3 CC-3-V1 6.0 || (1 kHz, 20 C.): = 10.2 4 CCP-3-1 5.0 (1 kHz, 20 C.): = 3.3 5 CLU-3-F 10.0 (1 kHz, 20 C.): = 6.9 6 PGP-2-3 5.0 .sub.1 (20 C.): = 65 mPas 7 PGP-2-4 2.0 K.sub.1 (20 C.): = 13.4 pN 8 PGUQU-3-F 5.0 K.sub.3 (20 C.): = 13.4 pN 9 PGUQU-4-F 6.0 10 PGUQU-5-F 4.5 11 PPGU-3-F 1.0 12 DUQU-(c5)-F 6.0 13 CCP-3-3 2.5 [00697]DUQU-(c5)-F

Mixture Example S104 (Stabilised with Compounds of Formulae ST-2-3 and H-3-1)

[0829] A nematic LC mixture according to the invention is formulated as follows:

TABLE-US-00259 Mixture M104 99.925 wt.-% Compound of Formula ST-2-3 500 ppm Compound of Formula H-3-1 250 ppm