Liquid crystalline medium

Abstract

The invention relates to dielectrically positive liquid crystalline media comprising a compound of formula I ##STR00001##
wherein the parameters have the meaning given in claim 1 and to liquid crystal displays comprising these media, especially to active matrix displays and in particular to TN and IPS mode displays.

Claims

1. A liquid crystal medium, comprising one or more compounds of formula I ##STR00166## wherein R.sup.1 denotes alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy with 1 to 7 C-atoms, or alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl with 2 to 7 C-atoms, and L.sup.1 denotes H or F; and one or more compounds of formula II-1a; and one or more compounds of formula II-1g; and optionally one or more compounds of formula III; ##STR00167## wherein R.sup.2 and R.sup.3 are, independently of each other, alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy with 1 to 7 C-atoms, or alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl with 2 to 7 C-atoms, ##STR00168## are, independently of each other, ##STR00169## L.sup.21, L.sup.22, L.sup.23, L.sup.24, L.sup.31 and L.sup.32 are, independently of each other, H or F, X.sup.2 and X.sup.3 are, independently of each other, halogen, halogenated alkyl or alkoxy with 1 to 3 C-atoms, or halogenated alkenyl or alkenyloxy with 2 or 3 C-atoms, Z.sup.3 is CH.sub.2CH.sub.2, CF.sub.2CF.sub.2, COO, trans-CHCH, trans-CFCF, CH.sub.2O or a single bond, and n and o are, independently of each other, 0 or 1; and wherein the liquid crystal medium has a , at 1 kHz and 20 C., of 8 to 14.

2. The liquid crystal medium according to claim 1, wherein L.sup.1 in formula I denotes H.

3. The liquid crystal medium according to claim 1, which comprises a compound of formula III.

4. The liquid crystal medium according to claim 1, wherein a compound of formula II-1g is a compound of formula II-1g-1 ##STR00170## wherein R.sup.2 is alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy with 1 to 7 C-atoms, or alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl with 2 to 7 C-atoms.

5. The liquid crystal medium according to claim 1, which additionally comprises one or more compounds of formula IV ##STR00171## wherein R.sup.41 and R.sup.42 are, independently of each other, alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy with 1 to 7 C-atoms, or alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl with 2 to 7 C-atoms, ##STR00172## independently of each other, and in case ##STR00173## is present twice, also these, independently of each other, are ##STR00174## Z.sup.41 and Z.sup.42 are, independently of each other, and in case Z.sup.41 is present twice, also these independently of each other, CH.sub.2CH.sub.2, COO, trans-CHCH, trans-CFCF, CH.sub.2O, CF.sub.2O, CC or a single bond, and p is 0, 1 or 2.

6. The liquid crystal medium according to claim 5, wherein the one or more compounds of formula IV are selected from the group consisting of compounds of formulae IV-1 to IV-5 ##STR00175## wherein R.sup.41 and R.sup.42 are, independently of each other, alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy with 1 to 7 C-atoms, or alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl with 2 to 7 C-atoms.

7. The liquid crystal medium according to claim 1, which additionally comprises one or more compounds of formula VI ##STR00176## wherein R.sup.61 and R.sup.62 are, independently of each other, alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy with 1 to 7 C-atoms, or alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl with 2 to 7 C-atoms, ##STR00177## in each occurrence independently of each other, denote ##STR00178## Z.sup.61 and Z.sup.62 are, independently of each other, CH.sub.2CH.sub.2, COO, trans-CHCH, trans-CFCF, CH.sub.2O, CF.sub.2O, CC or a single bond, and r is 0, 1 or 2.

8. The liquid crystal medium according to claim 7, wherein the one or more compounds of formula VI are selected from the group consisting of compounds of formulae VI-1 to VI-4 ##STR00179## wherein R.sup.61 and R.sup.62 are, independently of each other, alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy with 1 to 7 C-atoms, or alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl with 2 to 7 C-atoms.

9. The liquid crystal medium according to claim 1, wherein the total concentration of the one or more compounds of formula I in the medium is in the range of 1% to 20%.

10. A liquid crystal display, comprising a liquid crystal medium according to claim 1.

11. The liquid crystal display according to claim 10, which is addressed by an active matrix.

12. The liquid crystal medium according to claim 1, which has a , at 1 kHz and 20 C., of 8 to 13.

13. The liquid crystal medium according to claim 1, wherein Z.sup.3 is CH.sub.2CH.sub.2, CF.sub.2CF.sub.2, COO, trans-CHCH, trans-CFCF or CH.sub.2O.

14. A process for preparing the liquid-crystalline medium according to claim 1, comprising mixing one or more compounds of formula I with one or more compounds of formula II-1a and with one or more compounds of formula II-1 g, and optionally with one or more compounds of formula III, and optionally with one or more additives and/or stabilisers.

15. A liquid crystal medium, comprising one or more compounds of formula I ##STR00180## wherein R.sup.1 denotes alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy with 1 to 7 C-atoms, or alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl with 2 to 7 C-atoms, and L.sup.1 denotes H or F; and one or more compounds of formula II-1a ##STR00181## wherein R.sup.2 is alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy with 1 to 7 C-atoms, or alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl with 2 to 7 C-atoms, L.sup.21, L.sup.22, L.sup.23 and L.sup.24 are, independently of each other, H or F, and X.sup.2 is halogen, halogenated alkyl or alkoxy with 1 to 3 C-atoms, or halogenated alkenyl or alkenyloxy with 2 or 3 C-atoms, and wherein the liquid crystal medium has a , at 1 kHz and 20 C., of 8 to 14.

16. The liquid crystal medium according to claim 15, further comprising one or more compounds selected from the group consisting of compounds of formulae II-1g and III ##STR00182## wherein R.sup.2 and R.sup.3 are, independently of each other, alkyl, alkoxy, fluorinated alkyl or fluorinated alkoxy with 1 to 7 C-atoms, or alkenyl, alkenyloxy, alkoxyalkyl or fluorinated alkenyl with 2 to 7 C-atoms, ##STR00183## are, independently of each other, ##STR00184## L.sup.21, L.sup.22, L.sup.23, L.sup.24, L.sup.31 and L.sup.32 are, independently of each other, H or F, X.sup.2 and X.sup.3 are, independently of each other, halogen, halogenated alkyl or alkoxy with 1 to 3 C-atoms, or halogenated alkenyl or alkenyloxy with 2 or 3 C-atoms, Z.sup.3 is CH.sub.2CH.sub.2, CF.sub.2CF.sub.2, COO, trans-CHCH, trans-CFCF, CH.sub.2O or a single bond, and n and o are, independently of each other, 0 or 1.

17. A liquid crystal display, comprising a liquid crystal medium according to claim 15.

18. The liquid crystal display according to claim 16, which is addressed by an active matrix.

Description

EXAMPLES

(1) The examples given in the following are illustrating the present invention without limiting it in any way.

(2) However, the physical properties compositions illustrate to the expert, which properties can be achieved and in which ranges they can be modified. Especially the combination of the various properties, which can be preferably achieved, is thus well defined for the expert.

Example 1

(3) A liquid crystal mixture is realized with the composition and properties given in the following table.

(4) TABLE-US-00005 Composition Compound No. Abbreviation Conc./% 1 CC-3-V 40.50 2 CC-3-V1 8.00 3 CCP-V2-1 3.50 4 CPGU-3-OT 5.00 5 PGP-2-2V 20.00 6 PGUQU-3-F 8.00 7 PP-1-2V1 10.00 8 PUQU-3-T 5.00 100.00 Physical Properties T(N, I) = 75.5 C. n (20 C., 589.3 nm) = 0.1318 .sub.| | (20 C., 1 kHz) = 7.6 (20 C., 1 kHz) = 4.7 .sub.1 (20 C.) = 54 mPa .Math. s V.sub.(10, 0, 20) = 2.04 V V.sub.(90, 0, 20) = 3.03 V .sub.1/[ (V.sub.10).sup.2] = 2.76 mPa .Math. s V.sup.2 t.sub.on (V.sub.op = 5.0 V) = 1.50 ms t.sub.off (V.sub.op = 5.0 V) = 3.89 ms t.sub.sum (V.sub.op = 5.0 V) = 5.39 ms

Example 2

(5) A liquid crystal mixture is realized with the composition and properties given in the following table.

(6) TABLE-US-00006 Composition Compound No. Abbreviation Conc./% 1 CC-3-V 40.00 2 CC-3-V1 8.00 3 CCP-V2-1 4.00 4 CPGU-3-OT 5.00 5 PGP-2-2V 20.00 6 PGUQU-3-F 8.00 7 PP-1-2V1 10.00 8 GUQU-3-T 5.00 100.00 Physical Properties T(N, I) = 75.0 C. n (20 C., 589.3 nm) = 0.1309 .sub.| | (20 C., 1 kHz) = 7.7 (20 C., 1 kHz) = 4.7 .sub.1 (20 C.) = 55 mPa .Math. s V.sub.(10, 0, 20) = 2.02 V V.sub.(90, 0, 20) = 3.00 V .sub.1/[ (V.sub.10).sup.2] = 2.86 mPa .Math. s V.sup.2

Example 3

(7) A liquid crystal mixture is realized with the composition and properties given in the following table.

(8) TABLE-US-00007 Composition Compound No. Abbreviation Conc./% 1 CC-3-V 47.50 2 PP-1-2V1 5.00 3 PGP-2-2V 19.00 4 PGUQU-3-F 13.00 5 CPGU-3-OT 4.00 6 APUQU-3-F 5.50 7 PUQU-3-T 6.00 100.00 Physical Properties T(N, I) = 74.5 C. n (20 C., 589.3 nm) = 0.1322 .sub.| | (20 C., 1 kHz) = 11.3 (20 C., 1 kHz) = 8.1 .sub.1 (20 C.) = 60 mPa .Math. s V.sub.(10, 0, 20) = 1.55 V V.sub.(90, 0, 20) = 2.31 V .sub.1/[ (V.sub.10).sup.2] = 3.10 mPa .Math. s V.sup.2 t.sub.on (V.sub.op = 4.5 V) = 1.22 ms t.sub.off (V.sub.op = 4.5 V) = 4.67 ms t.sub.sum (V.sub.op = 4.5 V) = 5.88 ms

Example 4

(9) A liquid crystal mixture is realized with the composition and properties given in the following table.

(10) TABLE-US-00008 Composition Compound No. Abbreviation Conc./% 1 CC-3-V 47.00 2 PP-1-2V1 6.00 3 PGP-2-2V 19.00 4 PGUQU-3-F 12.00 5 CPGU-3-OT 5.00 6 APUQU-3-F 5.50 7 GUQU-3-T 5.50 100.00 Physical Properties T(N, I) = 74.0 C. n (20 C., 589.3 nm) = 0.1327 .sub.| | (20 C., 1 kHz) = 11.2 (20 C., 1 kHz) = 7.9 .sub.1 (20 C.) = 60 mPa .Math. s V.sub.(10, 0, 20) = 1.56 V V.sub.(90, 0, 20) = 2.34 V .sub.1/[ (V.sub.10).sup.2] = 3.13 mPa .Math. s V.sup.2

Example 5

(11) A liquid crystal mixture is realized with the composition and properties given in the following table.

(12) TABLE-US-00009 Composition Compound No. Abbreviation Conc./% 1 CC-3-V 42.00 2 PUQU-3-T 14.50 3 CCP-V-1 9.00 4 APUQU-2-F 6.00 5 APUQU-3-F 8.50 6 PGUQU-3-F 9.50 7 CPGU-3-OT 5.00 8 PGP-2-2V 5.50 100.00 Physical Properties T(N, I) = 74.5 C. n (20 C., 589.3 nm) = 0.1149 .sub.| | (20 C., 1 kHz) = 17.6 (20 C., 1 kHz) = 13.7 .sub.1 (20 C.) = 77 mPa .Math. s V.sub.(10, 0, 20) = 1.18 V V.sub.(90, 0, 20) = 1.81 V .sub.1/[ (V.sub.10).sup.2] = 4.06 mPa .Math. s V.sup.2

Example 6

(13) A liquid crystal mixture is realized with the composition and properties given in the following table.

(14) TABLE-US-00010 Composition Compound No. Abbreviation Conc./% Physical Properties 1 CC-3-V 42.50 T(N, I) = 74.0 C. 2 GUQU-3-T 13.00 n (20 C., 589.3 0.1150 3 CCP-V-1 8.00 nm) = 4 APUQU-2-F 6.00 (20 C., 1 kHz) = 17.6 5 APUQU-3-F 9.00 (20 C., 1 kHz) = 13.6 6 PGUQU-3-F 9.00 .sub.1 (20 C.) = 75 mPa .Math. s 7 CPGU-3-OT 5.50 V.sub.(10, 0, 20) = 1.17 V 8 PGP-2-2V 7.00 V.sub.(90, 0, 20) = 1.80 V 100.00 .sub.1/[ (V.sub.10).sup.2] = 4.03 mPa .Math. s V.sup.2

Example 7

(15) A liquid crystal mixture is realized with the composition and properties given in the following table.

(16) TABLE-US-00011 Composition Compound No. Abbreviation Conc./% Physical Properties 1 CC-3-V 42.50 T(N, I) = 74.5 C. 2 CCP-V-1 12.00 n (20 C., 589.3 0.1152 3 PP-1-2V1 2.50 nm) = 4 PUQU-3-T 8.00 (20 C., 1 kHz) = 17.2 5 PGUQU-3-F 8.50 (20 C., 1 kHz) = 13.6 6 PGUQU-4-F 8.50 .sub.1 (20 C.) = 75 mPa .Math. s 7 PGUQU-5-F 8.50 V.sub.(10, 0, 20) = 1.19 V 8 APUQU-3-F 9.50 V.sub.(90, 0, 20) = 1.84 V 100.00 .sub.1/[ (V.sub.10).sup.2] = 4.10 mPa .Math. s V.sup.2 t.sub.on (V.sub.op = 3.3 V) = 2.21 ms t.sub.off (V.sub.op = 3.3 V) = 7.89 ms t.sub.sum (V.sub.op = 3.3 V) = 10.10 ms

Example 8

(17) A liquid crystal mixture is realized with the composition and properties given in the following table.

(18) TABLE-US-00012 Composition Compound No. Abbreviation Conc./% Physical Properties 1 CC-3-V 45.50 T(N, I) = 75.0 C. 2 CCP-V-1 9.50 n (20 C., 589.3 0.1149 3 GUQU-3-T 7.50 nm) = 4 PGUQU-3-F 7.50 (20 C., 1 kHz) = 16.5 5 PGUQU-4-F 8.00 (20 C., 1 kHz) = 12.7 6 PGUQU-5-F 8.50 .sub.1 (20 C.) = 73 mPa .Math. s 7 APUQU-3-F 9.00 V.sub.(10, 0, 20) = 1.22 V 8 PGP-2-2V 4.50 V.sub.(90, 0, 20) = 1.89 V 100.00 .sub.1/[ (V.sub.10).sup.2] = 3.85 mPa .Math. s V.sup.2

Example 9

(19) A liquid crystal mixture is realized with the composition and properties given in the following table.

(20) TABLE-US-00013 Composition Compound No. Abbreviation Conc./% Physical Properties 1 CC-3-V 44.50 T(N, I) = 74.5 C. 2 APUQU-2-F 6.50 n (20 C., 589.3 0.1143 3 APUQU-3-F 8.00 nm) = 4 CPGU-3-OT 4.50 (20 C., 1 kHz) = 16.2 5 PGUQU-3-F 8.50 (20 C., 1 kHz) = 12.4 6 PUQU-3-T 6.00 .sub.1 (20 C.) = 69 mPa .Math. s 7 PGP-2-2V 2.00 V.sub.(10, 0, 20) = 1.19 V 8 CPU-3-OXF 20.00 V.sub.(90, 0, 20) = 1.82 V 100.00 .sub.1/[ (V.sub.10).sup.2] = 3.97 mPa .Math. s V.sup.2

Example 10

(21) A liquid crystal mixture is realized with the composition and properties given in the following table.

(22) TABLE-US-00014 Composition Compound No. Abbreviation Conc./% Physical Properties 1 CC-3-V 44.50 T(N, I) = 74.5 C. 2 APUQU-2-F 6.50 n (20 C., 589.3 0.1141 3 APUQU-3-F 8.00 nm) = 4 CPGU-3-OT 4.50 (20 C., 1 kHz) = 16.4 5 PGUQU-3-F 8.50 (20 C., 1 kHz) = 12.5 6 GUQU-3-T 5.50 .sub.1 (20 C.) = 69 mPa .Math. s 7 PGP-2-2V 2.00 V.sub.(10, 0, 20) = 1.19 V 8 CPU-3-OXF 20.50 V.sub.(90, 0, 20) = 1.81 V 100.00 .sub.1/[ (V.sub.10).sup.2] = 3.91 mPa .Math. s V.sup.2

Example 11

(23) A liquid crystal mixture is realized with the composition and properties given in the following table.

(24) TABLE-US-00015 Composition Compound No. Abbreviation Conc./% Physical Properties 1 CC-3-V 43.50 T(N, I) = 75.0 C. 2 CCP-V-1 4.00 n (20 C., 589.3 0.1151 3 PUQU-3-T 4.50 nm) = 4 PGUQU-3-F 6.00 (20 C., 1 kHz) = 16.0 5 PGUQU-4-F 6.50 (20 C., 1 kHz) = 12.2 6 PGUQU-5-F 7.00 .sub.1 (20 C.) = 70 mPa .Math. s 7 APUQU-3-F 8.00 V.sub.(10, 0, 20) = 1.20 V 8 CPU-3-OXF 20.50 V.sub.(90, 0, 20) = 1.85 V 100.00 .sub.1/[ (V.sub.10).sup.2] = 3.98 mPa .Math. s V.sup.2

Example 12

(25) A liquid crystal mixture is realized with the composition and properties given in the following table.

(26) TABLE-US-00016 Composition Compound No. Abbreviation Conc./% Physical Properties 1 CC-3-V 43.00 T(N, I) = 75.0 C. 2 CCP-V-1 4.50 n (20 C., 589.3 0.1150 3 GUQU-3-T 4.50 nm) = 4 PGUQU-3-F 6.00 (20 C., 1 kHz) = 16.2 5 PGUQU-4-F 6.50 (20 C., 1 kHz) = 12.3 6 PGUQU-5-F 7.00 .sub.1 (20 C.) = 70 mPa .Math. s 7 APUQU-3-F 8.00 V.sub.(10, 0, 20) = 1.20 V 8 CPU-3-OXF 20.50 V.sub.(90, 0, 20) = 1.84 V 100.00 .sub.1/[ (V.sub.10).sup.2] = 3.97 mPa .Math. s V.sup.2

Example 13

(27) A liquid crystal mixture is realized with the composition and properties given in the following table.

(28) TABLE-US-00017 Composition Compound No. Abbreviation Conc./% Physical Properties 1 CC-3-V 40.00 T(N, I) = 74.5 C. 2 PGP-2-2V 11.50 n (20 C., 589.3 0.1255 3 PUQU-3-T 12.00 nm) = 4 CCP-V-1 3.50 (20 C., 1 kHz) = 17.4 5 APUQU-2-F 6.00 (20 C., 1 kHz) = 13.5 6 APUQU-3-F 8.00 .sub.1 (20 C.) = 78 mPa .Math. s 7 PGUQU-3-F 9.50 V.sub.(10, 0, 20) = 1.17 V 8 CPGU-3-OT 4.00 V.sub.(90, 0, 20) = 1.79 V 9 CPU-3-F 5.50 .sub.1/[ (V.sub.10).sup.2] = 4.18 mPa .Math. 100.00 s V.sup.2

Example 14

(29) A liquid crystal mixture is realized with the composition and properties given in the following table.

(30) TABLE-US-00018 Composition Compound No. Abbreviation Conc./% Physical Properties 1 CC-3-V 41.00 T(N, I) = 74.5 C. 2 PGP-2-2V 13.50 n (20 C., 589.3 0.1253 3 GUQU-3-T 11.00 nm) = 4 CCP-V-1 3.50 (20 C., 1 kHz) = 17.4 5 APUQU-2-F 6.50 (20 C., 1 kHz) = 13.1 6 APUQU-3-F 8.00 .sub.1 (20 C.) = 75 mPa .Math. s 7 PGUQU-3-F 9.00 V.sub.(10, 0, 20) = 1.19 V 8 CPGU-3-OT 4.00 V.sub.(90, 0, 20) = 1.82 V 9 CPU-3-F 3.50 .sub.1/[ (V.sub.10).sup.2] = 4.08 mPa .Math. 100.00 s V.sup.2

Example 15

(31) A liquid crystal mixture is realized with the composition and properties given in the following table.

(32) TABLE-US-00019 Composition Compound No. Abbreviation Conc./% Physical Properties 1 CC-3-V 43.50 T(N, I) = 74.5 C. 2 CCP-V-1 5.00 n (20 C., 589.3 0.1255 3 PGP-2-2V 9.50 nm) = 4 PUQU-3-T 9.50 (20 C., 1 kHz) = 17.4 5 PGUQU-3-F 7.00 (20 C., 1 kHz) = 13.7 6 PGUQU-4-F 8.50 .sub.1 (20 C.) = 77 mPa .Math. s 7 PGUQU-5-F 9.00 V.sub.(10, 0, 20) = 1.18 V 8 APUQU-3-F 8.00 V.sub.(90, 0, 20) = 1.81 V 100.00 .sub.1/[ (V.sub.10).sup.2] = 4.05 mPa .Math. s V.sup.2 t.sub.on (V.sub.op = 3.3 V) = 1.83 ms t.sub.off (V.sub.op = 3.3 V) = 6.64 ms t.sub.sum (V.sub.op = 3.3 V) = 8.47 ms

Example 16

(33) A liquid crystal mixture is realized with the composition and properties given in the following table.

(34) TABLE-US-00020 Composition Compound No. Abbreviation Conc./% Physical Properties 1 CC-3-V 44.00 T(N, I) = 74.5 C. 2 CCP-V-1 6.00 n (20 C., 589.3 0.1251 3 PGP-2-2V 11.00 nm) = 4 GUQU-3-T 8.50 (20 C., 1 kHz) = 16.3 5 PGUQU-3-F 7.00 (20 C., 1 kHz) = 12.6 6 PGUQU-4-F 8.00 .sub.1 (20 C.) = 73 mPa .Math. s 7 PGUQU-5-F 9.00 V.sub.(10, 0, 20) = 1.23 V 8 APUQU-3-F 6.50 V.sub.(90, 0, 20) = 1.88 V 100.00 .sub.1/[ (V.sub.10).sup.2] = 3.87 mPa .Math. s V.sup.2

Example 17

(35) A liquid crystal mixture is realized with the composition and properties given in the following table.

(36) TABLE-US-00021 Composition Compound No. Abbreviation Conc./% Physical Properties 1 CC-3-V 39.50 T(N, I) = 75.5 C. 2 APUQU-2-F 5.00 n (20 C., 589.3 0.1260 3 APUQU-3-F 6.00 nm) = 4 CPGU-3-OT 3.50 (20 C., 1 kHz) = 17.0 5 PGUQU-3-F 9.50 (20 C., 1 kHz) = 13.0 6 PUQU-3-T 9.00 .sub.1 (20 C.) = 72 mPa .Math. s 7 PGP-2-2V 7.50 V.sub.(10, 0, 20) = 1.19 V 8 CPU-3-OXF 20.00 V.sub.(90, 0, 20) = 1.79 V 100.00 .sub.1/[ (V.sub.10).sup.2] = 3.95 mPa .Math. s V.sup.2

Example 18

(37) A liquid crystal mixture is realized with the composition and properties given in the following table.

(38) TABLE-US-00022 Composition Compound No. Abbreviation Conc./% Physical Properties 1 CC-3-V 39.50 T(N, I) = 76.0 C. 2 APUQU-2-F 5.00 n (20 C., 589.3 0.1260 3 APUQU-3-F 6.00 nm) = 4 CPGU-3-OT 4.50 (20 C., 1 kHz) = 16.8 5 PGUQU-3-F 8.50 (20 C., 1 kHz) = 12.7 6 GUQU-3-T 9.00 .sub.1 (20 C.) = 70 mPa .Math. s 7 PGP-2-2V 8.50 V.sub.(10, 0, 20) = 1.19 V 8 CPU-3-OXF 19.00 V.sub.(90, 0, 20) = 1.78 V 100.00 .sub.1/[ (V.sub.10).sup.2] = 3.91 mPa .Math. s V.sup.2

Example 19

(39) A liquid crystal mixture is realized with the composition and properties given in the following table.

(40) TABLE-US-00023 Composition Compound No. Abbreviation Conc./% Physical Properties 1 CC-3-V 41.50 T(N, I) = 75.0 C. 2 APUQU-3-F 4.00 n (20 C., 589.3 0.1247 3 PGUQU-3-F 7.00 nm) = 4 PGUQU-4-F 7.00 (20 C., 1 kHz) = 16.5 5 PGUQU-5-F 8.00 (20 C., 1 kHz) = 12.6 6 PUQU-3-T 4.50 .sub.1 (20 C.) = 71 mPa .Math. s 7 PGP-2-2V 3.50 V.sub.(10, 0, 20) = 1.19 V 8 CPU-3-OXF 24.50 V.sub.(90, 0, 20) = 1.81 V 100.00 .sub.1/[ (V.sub.10).sup.2] = 4.00 mPa .Math. s V.sup.2

Example 20

(41) A liquid crystal mixture is realized with the composition and properties given in the following table.

(42) TABLE-US-00024 Composition Compound No. Abbreviation Conc./% Physical Properties 1 CC-3-V 41.00 T(N, I) = 75.0 C. 2 APUQU-3-F 4.00 n (20 C., 589.3 0.1251 3 PGUQU-3-F 7.00 nm) = 4 PGUQU-4-F 7.00 (20 C., 1 kHz) = 16.7 5 PGUQU-5-F 8.00 (20 C., 1 kHz) = 12.9 6 GUQU-3-T 4.50 .sub.1 (20 C.) = 72 mPa .Math. s 7 PGP-2-2V 4.00 V.sub.(10, 0, 20) = 1.19 V 8 CPU-3-OXF 24.50 V.sub.(90, 0, 20) = 1.80 V 100.00 .sub.1/[ (V.sub.10).sup.2] = 3.99 mPa .Math. s V.sup.2