LIQUID-CRYSTALLINE MEDIUM AND LIQUID-CRYSTAL DISPLAY COMPRISING THE SAME

Abstract

The invention relates to a liquid-crystalline medium, which comprises one or more compounds of formula I

##STR00001##

in which

##STR00002##

denotes

##STR00003##

and the other the parameters have the meanings given in the text,
to the use thereof in an electro-optical display, particularly in an active-matrix display based on the IPS or FFS effect, to displays of this type which contain a liquid-crystalline medium of this type, and to the use of the compounds of formula I for the improvement of the transmission and/or response times of a liquid-crystalline medium which comprises one or more additional mesogenic compounds.

Claims

1. A liquid-crystalline medium which comprises one or more compounds of formula I ##STR00343## in which ##STR00344## denotes ##STR00345## denotes ##STR00346## n denotes 0 or 1, R.sup.11 and R.sup.12 independently of each other denote alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy, having 1 to 9 C atoms, alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl having 2 to 9 C atoms.

2. A medium according to claim 1, which comprises one or more compounds of formula I, which are selected from the group of compounds of formulae I-1 and I-2: ##STR00347## in which the parameters R.sup.11 and R.sup.12 have the meanings given in claim 1.

3. A medium according to claim 2, which comprises one or more compounds of formula I-1.

4. A medium according to claim 1, which further comprises one or more compounds selected from the group of compounds of formulae II and III: ##STR00348## in which R.sup.2 denotes alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms, alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl having 2 to 7 C atoms, ##STR00349## on each appearance, independently of one another, denote ##STR00350## L.sup.21 and L.sup.22 independently of one another denote H or F, X.sup.2 denotes halogen, halogenated alkyl or alkoxy having 1 to 3 C atoms or halogenated alkenyl or alkenyloxy having 2 or 3 C atoms, m denotes 0, 1, 2 or 3, R.sup.3 denotes alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms, alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl having 2 to 7 C atoms ##STR00351## on each appearance, independently of one another, are ##STR00352## L.sup.31 and L.sup.32, independently of one another, denote H or F, X.sup.3 denotes halogen, halogenated alkyl or alkoxy having 1 to 3 C atoms or halogenated alkenyl or alkenyloxy having 2 or 3 C atoms, F, Cl, OCF.sub.3, OCHF.sub.2, OCH.sub.2CF.sub.3, OCH?CF.sub.2, OCH?CH.sub.2 or CF.sub.3, Z.sup.3 denotes CH.sub.2CH.sub.2, CF.sub.2CF.sub.2, COO, trans-CH?CH, trans-CF?CF, CH.sub.2O or a single bond, and n denotes 0, 1, 2 or 3.

5. A medium according to claim 1, which further comprises one or more compounds selected from the group of formulae IV and V: ##STR00353## in which R.sup.41 and R.sup.42, independently of one another, denote alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms, alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl having 2 to 7 C atoms, ##STR00354## independently of one another and, if ##STR00355## occurs twice, also these independently of one another, denote ##STR00356## 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-CH?CH, trans-CF?CF, CH.sub.2O, CF.sub.2O, C?C or a single bond, p denotes 0, 1 or 2, R.sup.51 and R.sup.52, independently of one another, denote alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms, alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl having 2 to 7 C atoms, ##STR00357## if present, each, independently of one another, denote ##STR00358## Z.sup.51, Z.sup.52 and Z.sup.53 each, independently of one another, denote CH.sub.2CH.sub.2, CH.sub.2O, CH?CH, COO or a single bond, and i and j each, independently of one another, denote 0 or 1.

6. A medium according to claim 1, which further comprises one or more compounds selected from the group of formulae VI to IX: ##STR00359## wherein R.sup.61 denotes an unsubstituted alkyl radical having 1 to 7 C atoms, an unsubstituted alkenyl radical having 2 to 7 C atoms, an unsubstituted alkoxy radical having 1 to 6 C atoms or an unsubstituted alkenyloxy radical having 2 to 6 C atoms, R.sup.62 denotes an unsubstituted alkyl radical having 1 to 7 C atoms, an unsubstituted alkoxy radical having 1 to 6 C atoms or an unsubstituted alkenyloxy radical having 2 to 6 C atoms, and l denotes 0 or 1, R.sup.71 denotes an unsubstituted alkyl radical having 1 to 7 C atoms, or an unsubstituted alkenyl radical having 2 to 7 C atoms, R.sup.72 denotes an unsubstituted alkyl radical having 1 to 7 C atoms, an unsubstituted alkoxy radical having 1 to 6 C atoms or an unsubstituted alkenyloxy radical having 2 to 6 C atoms, ##STR00360## denotes ##STR00361## R.sup.81 denotes an unsubstituted alkyl radical having 1 to 7 C atoms, or an unsubstituted alkenyl radical having 2 to 7 C atoms, R.sup.82 denotes an unsubstituted alkyl radical having 1 to 7 C atoms, an unsubstituted alkoxy radical having 1 to 6 C atoms or an unsubstituted alkenyloxy radical having 2 to 6 C atoms, preferably having 2, 3 or 4 C atoms, ##STR00362## denotes ##STR00363## Z.sup.8 denotes (C?O)O, CH.sub.2O, CF.sub.2O or CH.sub.2CH.sub.2, o denotes 0 or 1, R.sup.91 and R.sup.92 independently of one another denote an unsubstituted alkyl radical having 1 to 7 C atoms, an unsubstituted alkoxy radical having 1 to 6 C atoms or an unsubstituted alkenyloxy radical having 2 to 6 C atoms, ##STR00364## denotes ##STR00365## p and q independently of each other denote 0 or 1.

7. A medium according to claim 1, wherein the total concentration of the compounds of formula I in the medium as a whole is 1% or more to 60% or less.

8. A medium according to claim 1, which further comprises one or more compounds selected from the group of compounds of formulae CCVC-n-V, CCGU-n-F, PPGU-n-F, DPGU-n-F, CDUQU-n-F and APUQU-n-F, wherein n denotes an integer from 1 to 6.

9. A medium according to claim 1, which in addition to the compound or compounds of formula I comprises one or more stabilizers.

10. An electro-optical display or electro-optical component, which comprises a liquid-crystalline medium according to claim 1.

11. A display according to claim 10, which is based on the IPS- or FFS mode.

12. A display according to claim 10, which contains an active-matrix addressing device.

13. A display according to claim 10, which is a mobile display.

14. A method which comprises including a medium according to claim 1 in an electro-optical display or in an electro-optical component.

15. A process for the preparation of a liquid-crystalline medium according to claim 1, wherein one or more compounds of formula I are mixed with one or more additional mesogenic compounds and optionally a stabilizer.

Description

EXAMPLES

[0319] The following examples explain the present invention without restricting it in any way. However, the physical properties make it clear to the person skilled in the art what properties can be achieved and in what ranges they can be modified. In particular, the combination of the various properties which can preferably be achieved is thus well defined for the person skilled in the art.

MIXTURE EXAMPLES

[0320] In the following are exemplary mixtures disclosed.

Example 1

[0321] The following mixture (M-1) is prepared and investigated.

TABLE-US-00007 Mixture 1 Composition Compound Concentration No. Abbreviation /% by weight 1 B-2O-O5 3.5 2 CY-3-O2 4.5 3 PY-3-O2 5.0 4 CC-3-V 35.0 5 CC-3-V1 7.0 6 CC-3-2V1 6.0 7 CCP-V-1 6.0 8 PGP-2-4 5.0 9 CPGU-3-OT 4.5 10 PPGU-3-F 0.5 11 APUQU-2-F 6.0 12 APUQU-3-F 7.0 13 PGUQU-3-F 4.0 14 PGUQU-4-F 6.0 ? 100.0 Physical properties T (N, I) = 75.0? C. n.sub.e (25? C., 589 nm) = 1.5916 ?n (25? C., 589 nm) = 0.1096 ?.sub.|| (25?, 1 kHz) = 10.8 ?.sub.? (25?, 1 kHz) = 4.4 ?? (25?, 1 kHz) = 6.4 ?.sub.av. (25?, 1 kHz) = 6.7 ?.sub.1 (25? C.) = 62 mPa .Math. s k.sub.11 (25? C.) = 12.3 pN k.sub.33 (25? C.) = 12.7 pN V.sub.0 (25? C.) = 1.47 V ?n (20? C., 589 nm) = 0.1117 ?? (20?, 1 kHz) = 6.7 ?.sub.1 (20? C.) = 76 mPa .Math. s k.sub.11 (20? C.) = 13.0 pN k.sub.33 (20? C.) = 13.3 pN V.sub.0 (20? C.) = 1.49 V

[0322] This mixture, mixture M-1, has at 25? C. a dielectric ratio (?.sub.?/??) of 0.66, a ratio of (?.sub.1/k.sub.11) of 5.04 mPa.Math.s/pN and is characterized by a very good transmission in an FFS display and shows a very short response time. 0.050% of STA-1-1 are added to the mixture M-1. The resultant mixture M-1.1 is investigated with respect to its stability, which is found to be excellent.

Example 2

[0323] The following mixture (M-2) is prepared and investigated.

TABLE-US-00008 Mixture 2 Composition Compound Concentration No. Abbreviation /% by weight 1 B(S)-2O-O4 3.5 2 B(S)-2O-O5 3.5 3 CC-3-V 41.0 4 CC-3-V1 6.0 5 CCP-V-1 15.5 6 PP-1-2V1 6.0 7 CPPC-3-3 1.0 8 CCG-V-F 7.5 9 PPGU-3-F 0.5 10 DGUQU-4-F 8.0 11 PGUQU-3-F 6.0 12 PGUQU-4-F 1.5 ? 100.0 Physical properties T (N, I) = 79.7? C. n.sub.e (25? C., 589 nm) = 1.5854 ?n (25? C., 589 nm) = 0.0994 ?.sub.|| (25?, 1 kHz) = 8.2 ?? (25?, 1 kHz) = 3.8 ?? (25?, 1 kHz) = 4.4 ?.sub.av. (25?, 1 kHz) = 5.3 ?.sub.1 (25? C.) = 51 mPa .Math. s k.sub.11 (25? C.) = 12.7 pN k.sub.33 (25? C.) = 14.5 pN V.sub.0 (25? C.) = 1.79 V ?n (20? C., 589 nm) = 0.1009 ?? (20?, 1 kHz) = 4.6 ?.sub.1 (20? C.) = 62 mPa .Math. s k.sub.11 (20? C.) = 13.4 pN k.sub.33 (20? C.) = 15.0 pN V.sub.0 (20? C.) = 1.80 V

[0324] This mixture, mixture M-2, has at 25? C. a dielectric ratio (?.sub.?/??) of 0.86, a ratio of (?.sub.1/k.sub.11) of 4.02 mPa.Math.s/pN and is characterized by a very good transmission in an FFS display and shows a very short response time. 0.050% of STA-1-1 are added to the mixture M-2. The resultant mixture M-2.1 is investigated with respect to its stability, which is found to be excellent.

Example 3

[0325] The following mixture (M-3) is prepared and investigated.

TABLE-US-00009 Mixture 3 Composition Compound Concentration No. Abbreviation /% by weight 1 B(S)-2O-O4 4.0 2 B(S)-2O-O5 4.0 3 CC-3-V 46.0 4 CCP-V-1 16.0 5 PP-1-2V1 6.5 6 CPPC-3-3 2.0 7 CCG-V-F 7.0 8 PPGU-3-F 0.5 9 DGUQU-4-F 8.0 10 PGUQU-3-F 6.0 ? 100.0 Physical properties T (N, I) = 79.7? C. n.sub.e (25? C., 589 nm) = 1.5863 ?n (25? C., 589 nm) = 0.0994 ?.sub.|| (25?, 1 kHz) = 7.8 ?.sub.? (25?, 1 kHz) = 3.8 ?? (25?, 1 kHz) = 3.9 ?.sub.av. (25?, 1 kHz) = 5.1 ?.sub.1 (25? C.) = 51 mPa .Math. s k.sub.11 (25? C.) = 12.6 pN k.sub.33 (25? C.) = 14.3 pN V.sub.0 (25? C.) = 1.90 V ?n (20? C., 589 nm) = 0.1014 ?? (20?, 1 kHz) = 4.1 ?.sub.1 (20? C.) = 62 mPa .Math. s k.sub.11 (20? C.) = 13.2 pN k.sub.33 (20? C.) = 14.8 pN V.sub.0 (20? C.) = 1.91 V

[0326] This mixture, mixture M-3, has at 25? C. a dielectric ratio (?.sub.?/??) of 0.97, a ratio of (?.sub.1/k.sub.11) of 4.05 mPa.Math.s/pN and is characterized by a very good transmission in an FFS display and shows a very short response time. 0.050% of STA-1-1 are added to the mixture M-3. The resultant mixture M-3.1 is investigated with respect to its stability, which is found to be excellent.

Example 4

[0327] The following mixture (M-4) is prepared and investigated.

TABLE-US-00010 Mixture 4 Composition Compound Concentration No. Abbreviation /% by weight 1 B-2O-O5 3.0 2 CLY-3-02 7.0 3 CC-3-V 26.5 4 CC-3-V1 6.0 5 CC-3-2V1 4.0 6 CCP-V-1 16.0 7 CCP V2-1 9.0 8 PGP-2-2V 5.0 9 CCGU-3-F 8.0 10 PPGU-3-F 0.5 11 PUQU-3-F 7.0 12 APUQU-2-F 3.0 13 APUQU-3-F 5.0 ? 100.0 Physical properties T (N, I) = 107.1? C. n.sub.e (25? C., 589 nm) = 1.5960 ?n (25? C., 589 nm) = 0.1088 ?.sub.|| (25?, 1 kHz) = 8.2 ?.sub.? (25?, 1 kHz) = 3.7 ?? (25?, 1 kHz) = 4.5 ?.sub.av. (25?, 1 kHz) = 5.2 ?.sub.1 (25? C.) = 97 mPa .Math. s k.sub.11 (25? C.) = 16.5 pN k.sub.33 (25? C.) = 18.2 pN V.sub.0 (25? C.) = 2.03 V ?n (20? C., 589 nm) = 0.1101 ?? (20?, 1 kHz) = 4.7 ?.sub.1 (20? C.) = 121 mPa .Math. s k.sub.11 (20? C.) = 17.2 pN k.sub.33 (20? C.) = 19.3 pN V.sub.0 (20? C.) = 2.03 V

[0328] This mixture, mixture M-4, has at 25? C. a dielectric ratio (?.sub.?/??) of 0.82, a ratio of (?.sub.1/k.sub.11) of 5.88 mPa.Math.s/pN and is characterized by a very good transmission in an FFS display and shows a very short response time.

Example 5

[0329] The following mixture (M-5) is prepared and investigated.

TABLE-US-00011 Mixture 5 Composition Compound Concentration No. Abbreviation /% by weight 1 B-2O-O5 3.5 2 CPY-2-O2 3.5 3 CPY-2-O3 7.5 4 CC-3-V 38.5 5 CC-3-V1 10.0 6 CC-3-2V1 8.5 7 CCP-V-1 8.0 8 CLP-3-T 6.0 9 PGU-3-F 11.0 10 PPGU-3-F 0.5 11 PUQU-3-F 3.0 ? 100.0 Physical properties T (N, I) = 77.3? C. n.sub.e (20? C., 589 nm) = 1.5831 ?n (20? C., 589 nm) = 0.1000 ?.sub.|| (20?, 1 kHz) = 6.3 ?.sub.? (20?, 1 kHz) = 3.8 ?? (20?, 1 kHz) = 2.5 ?.sub.av. (200, 1 kHz) = 4.6 ?.sub.1 (20? C.) = 64 mPa .Math. s k.sub.11 (20? C.) = 15.5 pN k.sub.33 (20? C.) = 15.3 pN V.sub.0 (20? C.) = 0.99 V ?n (25? C., 589 nm) = 0.0981 ?? (25?, 1 kHz) = 2.4 ?.sub.1 (25? C.) = t.b.d. mPa .Math. s k.sub.11 (25? C.) = 14.6 pN k.sub.33 (25? C.) = 14.6 pN V.sub.0 (25? C.) = t.b.d. V Remark: t.b.d.: to be determined

[0330] This mixture, mixture M-5, has at 20? C. a dielectric ratio (?.sub.?/??) of 1.52, a ratio of (?.sub.1/k.sub.11) of 4.13 mPa.Math.s/pN and is characterized by a very good transmission in an FFS display and shows a very short response time.

Example 6

[0331] The following mixture (M-6) is prepared and investigated.

TABLE-US-00012 Mixture 6 Composition Compound Concentration No. Abbreviation /% by weight 1 B(S)-2O-O4 4.0 2 B(S)-2O-O5 4.0 3 CPY-3-O2 9.0 4 CC-3-V 49.5 5 CCP-V-1 14.0 6 PGP-2-2V 2.0 7 CCGU-3-F 6.0 8 PPGU-3-F 0.5 9 PUQU-3-F 11.0 ? 100.0 Physical properties T (N, I) = 79.5? C. n.sub.e (20? C., 589 nm) = 1.5861 ?n (20? C., 589 nm) = 0.1003 ?.sub.|| (20?, 1 kHz) = 6.6 ?.sub.? (20?, 1 kHz) = 4.3 ?? (20?, 1 kHz) = 2.3 ?.sub.av. (200, 1 kHz) = 5.5 ?.sub.1 (20? C.) = 65 mPa .Math. s k.sub.11 (20? C.) = 13.2 pN k.sub.33 (20? C.) = 14.5 pN V.sub.0 (20? C.) = t.b.d. V ?n (25? C., 589 nm) = 0.0983 ?? (25?, 1 kHz) = 2.2 ?.sub.1 (25? C.) = 53 mPa .Math. s k.sub.11 (25? C.) = 12.6 pN k.sub.33 (25? C.) = 14.0 pN V.sub.0 (25? C.) = t.b.d. V Remark: t.b.d.: to be determined

[0332] This mixture, mixture M-6, has at 20? C. a dielectric ratio (?.sub.?/??) of 1.87, a ratio of (?.sub.1/k.sub.11) of 4.92 mPa.Math.s/pN and is characterized by a very good transmission in an FFS display and shows a very short response time.

Example 7

[0333] The following mixture (M-7) is prepared and investigated.

TABLE-US-00013 Mixture 7 Composition Compound Concentration No. Abbreviation /% by weight 1 B(S)-2O-O4 2.0 2 B(S)-2O-O5 2.0 5 PY-3-O2 2.0 3 CLY-3-O2 6.0 4 CC-3-V 30.0 6 CC-3-V1 5.0 7 CCP-3-1 2.0 8 CCP-V-1 12.0 9 CCP-V2-1 10.0 10 CCVC-3-V 5.0 11 CCGU-3-F 8.0 12 DPGU-4-F 4.0 13 PUQU-3-F 12.0 ? 100.0 Physical properties T (N, I) = 106.3? C. n.sub.e (20? C., 589 nm) = 1.5914 ?n (20? C., 589 nm) = 0.1041 ?.sub.|| (20?, 1 kHz) = 8.3 ?.sub.? (20?, 1 kHz) = 3.9 ?? (20?, 1 kHz) = 4.4 ?.sub.av. (200, 1 kHz) = 6.4 ?.sub.1 (20? C.) = 114 mPa .Math. s k.sub.11 (20? C.) = 16.8 pN k.sub.33 (20? C.) = 18.8 pN V.sub.0 (20? C.) = 2.07 V ?n (25? C., 589 nm) = 0.1027 ?? (25?, 1 kHz) = 4.2 ?.sub.1 (25? C.) = 92 mPa .Math. s k.sub.11 (25? C.) = 16.1 pN k.sub.33 (25? C.) = 18.2 pN V.sub.0 (25? C.) = 2.06 V

[0334] This mixture, mixture M-7, has at 20? C. a dielectric ratio (?.sub.?/??) of 0.89, a ratio of (?.sub.1/k.sub.11) of 6.79 mPa.Math.s/pN and is characterized by a very good transmission in an FFS display and shows a very short response time. 0.020% and alternatively, 0.050% of TINUVIN 770? are added to the mixture M-7. The resultant mixtures M-7.1 and M7.2 are investigated with respect to their stability, which is found to be excellent.

Example 8

[0335] The following mixture (M-8) is prepared and investigated.

TABLE-US-00014 Mixture 8 Composition Compound Concentration No. Abbreviation /% by weight Compound Concentration No. Abbreviation /% by weight 1 B(S)-2O-O4 2.5 2 B(S)-2O-O5 2.5 5 PY-3-O2 2.0 3 CLY-3-O2 7.0 4 CC-3-V 28.0 6 CC-3-V1 6.0 7 CCP-V-1 12.0 8 CCP-V2-1 10.0 9 CCVC-3-V 5.0 10 CCGU-3-F 8.0 11 DPGU-4-F 2.0 12 PUQU-3-F 10.0 13 CDUQU-4-F 4.0 ? 100.0 Physical properties T (N, I) = 106.5? C. n.sub.e (25? C., 589 nm) = 1.5905 ?n (25? C., 589 nm) = 0.1038? C. ?.sub.|| (20?, 1 kHz) = 8.6 ?.sub.? (20?, 1 kHz) = 4.3 ?? (20?, 1 kHz) = 4.4 ?.sub.av. (20?, 1 kHz) = 5.8 ?.sub.1 (20? C.) = 124 mPa .Math. s k.sub.11 (20? C.) = 17.1 pN k.sub.22 (20? C.) = t.b.d. pN k.sub.33 (20? C.) = 18.9 pN V.sub.0 (20? C.) = 2.10 V ?n (25? C., 589 nm) = 0.1028 ?? (25?, 1 kHz) = 4.2 ?.sub.1 (25? C.) = 100 mPa .Math. s k.sub.11 (25? C.) = 16.4 pN k.sub.33 (25? C.) = 18.4 pN V.sub.0 (25? C.) = 2.09 V Remark: t.b.d.: to be determined

[0336] This mixture, mixture M-8 has at 20? C. a dielectric ratio (?.sub.?/??) of 0.98, a ratio of (?.sub.1/k.sub.11) of 7.25 mPa.Math.s/pN and is characterized by a very good transmission in an FFS display and shows a very short response time. 0.050% of TINUVIN 770? are added to the mixture M-8. The resultant mixture M-8.1 is investigated with respect to its stability, which is found to be excellent.

Example 9

[0337] The following mixture (M-9) is prepared and investigated.

TABLE-US-00015 Mixture 9 Composition Compound Concentration No. Abbreviation /% by weight Compound Concentration No. Abbreviation /% by weight 1 B-2O-O5 3.0 2 CLY-3-O2 7.0 5 CC-3-V 29.5 3 CC-3-V1 4.0 4 CC-3-2V1 4.0 6 CCP-V-1 12.0 7 CCP-V2-1 5.0 8 CCVC-3-V 5.0 9 PGP-1-2V 4.5 10 CCGU-3-F 6.5 11 DPGU-4-F 4.0 12 PPGU-3-F 0.5 13 PUQU-3-F 11.0 14 CDUQU-3-F 2.0 15 PGUQU-3-F 2.0 ? 100.0 Physical properties T (N, I) = 105.2? C. n.sub.e (25? C., 589 nm) = 1.5950 ?n (25? C., 589 nm) = 0.1094 ?.sub.|| (25?, 1 kHz) = 9.1 ?.sub.? (25?, 1 kHz) = 3.8 ?? (25?, 1 kHz) = 5.3 ?.sub.av. (25?, 1 kHz) = 5.4 ?.sub.1 (25? C.) = 91 mPa .Math. s k.sub.11 (25? C.) = 16.3 pN k.sub.22 (25? C.) = t.b.d. pN k.sub.33 (25? C.) = 18.1 pN V.sub.0 (25? C.) 1.85 V ?n (20? C., 589 nm) = 0.1107 ?? (20?, 1 kHz) = 5.5 ?.sub.1 (20? C.) = 112 mPa .Math. s k.sub.11 (20? C.) = 17.0 pN k.sub.33 (20? C.) = 18.7 pN V.sub.0 (20? C.,) = 1.85 V Remark: t.b.d.: to be determined

[0338] This mixture, mixture M-9 has at 25? C. a dielectric ratio (?.sub.?/??) of 0.72, a ratio of (?.sub.1/k.sub.11) of 6.02 mPa.Math.s/pN and is characterized by a very good transmission in an FFS display and shows a very short response time.

[0339] 0.020% of compound S are added to the mixture M-9. The resultant mixture M-9.1 is investigated with respect to its stability, which is found to be excellent.

Example 10

[0340] The following mixture (M-10) is prepared and investigated.

TABLE-US-00016 Mixture 10 Composition Compound Concentration No. Abbreviation /% by weight Compound Concentration No. Abbreviation /% by weight 1 B(S)-2O-O4 2.5 2 B(S)-2O-O5 2.5 5 PY-3-O2 4.0 3 CLY-3-O2 6.0 4 CC-3-V 30.0 6 CC-3-V1 4.0 7 CCP-V-1 12.0 8 CCP-V2-1 10.0 9 CCVC-3-V 5.0 10 CCGU-3-F 8.0 11 DPGU-4-F 4.0 12 PUQU-3-F 10.0 13 CDUQU-3-F 4.0 ? 100.0 Physical properties T (N, I) = 103.5? C. n.sub.e (20? C., 589 nm) = 1.5902 ?n (20? C., 589 nm) = 0.1036 ?.sub.|| (20?, 1 kHz) = 8.6 ?.sub.? (20?, 1 kHz) = 4.3 ?? (20?, 1 kHz) = 4.3 ?.sub.av. (20?, 1 kHz) = 5.7 ?.sub.1 (20? C.) = 118 mPa .Math. s k.sub.11 (20? C.) = 16.5 pN k.sub.22 (20? C.) = t.b.d. pN k.sub.33 (20? C.) = 18.5 pN V.sub.0 (20? C.) 2.07 V Remark: t.b.d.: to be determined

[0341] This mixture, mixture M-10 has a dielectric ratio (?.sub.?/??) of 0.72, a ratio of (?.sub.1/k.sub.11) of 6.02 mPa.Math.s/pN and is characterized by a very good transmission in an FFS display and shows a very short response time. 0.020% of compound S are added to the mixture M-10. The resultant mixture M-10.1 is investigated with respect to its stability, which is found to be excellent.

Example 11

[0342] The following mixture (M-11) is prepared and investigated.

TABLE-US-00017 Mixture 11 Composition Compound Concentration No. Abbreviation /% by weight 1 B-2O-O5 3.5 2 CY-5-02 7.0 3 CC-3-V 32.5 4 CC-3-V1 12.0 5 CC-3-2V1 10.5 6 CCP-V-1 10.5 7 CCP V2-1 2.0 8 PP-1-2V1 2.5 9 PGP-2-2V 7.0 10 PPGU-3-F 0.5 11 APUQU-2-F 6.0 12 APUQU-3-F 7.5 ? 100.0 Physical properties T (N, I) = 79.5? C. n.sub.e (20? C., 589 nm) = 1.5827 ?n (20? C., 589 nm) = 0.0992 ?.sub.|| (20? C., 1 kHz) = 6.5 ?.sub.? (20? C., 1 kHz) = 3.5 ?? (20? C., 1 kHz) = 3.0 ?.sub.av. (20? C., 1 kHz) = 4.5 ?.sub.1 (20? C.) = 58 mPa .Math. s k.sub.11 (20? C.) = t.b.d. pN k.sub.33 (20? C.) = t.b.d. pN V.sub.0 (20? C.) = t.b.d. V Remark: t.b.d.: to be determined

[0343] This mixture, mixture M-11 has a beneficial dielectric ratio (?.sub.?/??), a good ratio of (?.sub.1/k.sub.11) and is characterized by a very good transmission in an FFS display and shows a very short response time.

[0344] 0.020% of compound TINUVIN?, respectively STA-1-1 are added to the mixture M-11. The resultant mixtures M-11.1 and M-11.2 are investigated with respect to its stability, which is found to be excellent.

Example 12

[0345] The following mixture (M-12) is prepared and investigated.

TABLE-US-00018 Mixture 12 Composition Compound Concentration No. Abbreviation /% by weight 1 B(S)-2O-O4 4.0 2 B(S)-2O-O5 4.0 3 CC-3-V 27.5 4 CP-3-O2 4.5 5 CCP-V-1 11.5 6 CCP V2-1 1.0 7 CCVC-3-V 6.0 8 CVCP-V-1 4.0 9 PGP-1-2V 6.0 10 PGP-2-2V 6.0 11 CPGP-5-2 3.0 12 CPGP-5-3 2.0 13 DPGU-4-F 2.0 14 PPGU-3-F 0.5 15 PUQU-3-F 5.0 16 CDUQU-3-F 0.5 17 APUQU-3-F 3.0 18 PGUQU-3-F 4.0 19 PGUQU-4-F 4.0 20 PGUQU-5-F 1.5 ? 100.0 Physical properties T (N, I) = 110.0? C. n.sub.e (20? C., 589 nm) = 1.6328 ?n (20? C., 589 nm) = 0.1390 ?.sub.|| (20? C., 1 kHz) = 9.0 ?.sub.? (20? C., 1 kHz) = 4.0 ?? (20? C., 1 kHz) = 5.0 ?.sub.av. (20? C., 1 kHz) = 5.7 ?.sub.1 (20? C.) = 107 mPa .Math. s k.sub.11 (20? C.) = 16.2 pN k.sub.33 (20? C.) = 17.3 pN V.sub.0 (20? C.) = 1.91 V ?.sub.? (20? C.)/??(20? C.) = 0.80 ?.sub.1 (20? C.)/k.sub.11(20? C.) = 6.60 mPa .Math. s/ pN

Example 13

[0346] The following mixture (M-13) is prepared and investigated.

TABLE-US-00019 Mixture 13 Composition Compound Concentration No. Abbreviation /% by weight 1 B(S)-2O-O4 4.0 2 B(S)-2O-O5 4.0 3 CPY-3-O2 3.0 4 PGIY-2-O4 4.0 5 CC-3-V 21.0 6 CP-3-O2 7.0 7 CCP-V-1 14.0 8 CCVC-3-V 6.0 9 CVCP-V-1 4.0 10 PGP-1-2V 6.0 11 PGP-2-2V 2.5 12 CPGP-5-2 2.5 13 DPGU-4-F 2.0 14 PPGU-3-F 0.5 15 PUQU-3-F 5.0 16 CDUQU-3-F 0.5 17 APUQU-3-F 7.0 18 PGUQU-3-F 4.5 19 PGUQU-4-F 2.5 ? 100.0 Physical properties T (N, I) = 110.4? C. n.sub.e (20? C., 589 nm) = 1.6351 ?n (20? C., 589 nm) = 0.1409 ?.sub.|| (20? C., 1 kHz) = 9.9 ?.sub.? (20? C., 1 kHz) = 4.7 ?? (20? C., 1 kHz) = 5.2 ?.sub.av. (20? C., 1 kHz) = 6.4 ?.sub.1 (20? C.) = 127 mPa .Math. s k.sub.11 (20? C.) = 16.4 pN k.sub.33 (20? C.) = 17.4 pN V.sub.0 (20? C.) = 1.89 V ?.sub.? (20? C.)/??(20? C.) = 0.90 ?.sub.1 (20? C.)/k.sub.11(20? C.) = 7.74 mPa .Math. s/ pN

Example 14

[0347] The following mixture (M-14) is prepared and investigated.

TABLE-US-00020 Mixture 14 Composition Compound Concentration No. Abbreviation /% by weight 1 B(S)-2O-O4 4.0 2 B(S)-2O-O5 4.0 3 CPY-3-O2 1.5 4 PGIY-2-O4 2.0 5 CC-3-V 24.5 6 CP-3-O2 5.5 7 CCP-V-1 13.0 8 CCVC-3-V 6.5 9 CVCP-V-1 4.0 10 PGP-1-2V 6.0 11 PGP-2-2V 4.5 12 CPGP-5-2 3.5 13 DPGU-4-F 2.0 14 PPGU-3-F 0.5 15 PUQU-3-F 5.0 16 CDUQU-3-F 0.5 17 APUQU-3-F 5.0 18 PGUQU-3-F 4.5 19 PGUQU-4-F 3.5 ? 100.0 Physical properties T (N, I) = 110.0? C. n.sub.e (20? C., 589 nm) = 1.6335 ?n (20? C., 589 nm) = 0.1397 ?.sub.|| (20? C., 1 kHz) = 9.3 ?.sub.? (20? C., 1 kHz) = 4.7 ?? (20? C., 1 kHz) = 5.0 ?.sub.av. (20? C., 1 kHz) = 6.4 ?.sub.1 (20? C.) = 114 mPa .Math. s k.sub.11 (20? C.) = 16.1 pN k.sub.33 (20? C.) = 17.3 pN V.sub.0 (20? C.) = 1.91 V ?.sub.? (20? C.)/??(20? C.) = 0.940 ?.sub.1 (20? C.)/k.sub.11(20? C.) = 7.08 mPa .Math. s/ pN

[0348] These further three exemplary mixtures, mixture M-12; M-13 and M-14, have beneficial dielectric ratios (?.sub.?/??), good ratios of (?.sub.1/k.sub.11) and are characterized by a very good transmission in an FFS display and shows a very short response time.

[0349] 0.020% of compound TINUVIN?, respectively STA-1-1 are added to the one each of the mixtures M-12, M-13 and M-14. The resultant mixtures M12.1 and M-12.2; M-13.1 and M-13.2; and M-14.1 and M-14.2; respectively; are investigated with respect to its stability, which is found to be excellent.

[0350] The preceding examples can be repeated with similar success by substituting the generically or specifically described reactants and/or operating conditions of this invention for those used in the preceding examples.

[0351] From the foregoing description, one skilled in the art can easily ascertain the essential characteristics of this invention and, without departing from the spirit and scope thereof, can make various changes and modifications of the invention to adapt it to various usages and conditions.