Liquid crystal medium

A technology of liquid crystal medium and medium, applied in liquid crystal materials, optics, instruments, etc., can solve the problem of high resistance

Inactive Publication Date: 2009-07-15
MERCK PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 3. High resistance
[0010] 4. Low freque...

Method used

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  • Liquid crystal medium
  • Liquid crystal medium
  • Liquid crystal medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0308] ME2N.F 3.00% Clearing point [°C]: +80.5

[0309] ME3N.F 3.00% Δn[589nm, 20°C]: +0.0798

[0310] ME4N.F 2.00% d·Δn[20°C, μm]: 0.50

[0311] CCP-2F.F.F 10.00% Twist [°]: 90

[0312] CCP-3F.F.F 10.00% V 10 [V]: 1.01

[0313] CCP-5F.F.F 10.00%

[0314] CDU-2-F 10.00%

[0315] CDU-3-F 10.00%

[0316] CDU-5-F 10.00%

[0317] CCG-V-F 21.00%

[0318] CH-33 3.00%

[0319] CH-35 3.00%

[0320]CH-43 3.00%

[0321] CH-45 2.00%

Embodiment 2

[0323] PCH-3N.F.F 1.00% Clearing point[°C]: +80.0

[0324] ME2N.F 9.00% Δn[589nm, 20°C]: 0.1379

[0325] ME3N.F 9.00% HTP [1 / μm, 20°C]: -13.87

[0326] ME4N.F 15.00% d·Δn[20°C, μm]: 0.85

[0327] ME5N.F 13.00% Twist [°]: 240

[0328] HP-3N.F 6.00% V 10 [V]: 0.76

[0329] HP-4N.F 5.00% V 90 / V 10 : 1.119

[0330] HP-5N.F 5.00%

[0331] CDU-2-F 9.00%

[0332] CDU-3-F 9.00%

[0333] CDU-5-F 8.00%

[0334] CCPC-33 4.00%

[0335] CCPC-34 4.00%

[0336] CCPC-35 3.00%

Embodiment 3

[0338] PCH-3N.F.F 1.00% Clearing point[°C]: +80.0

[0339] PZU-V2-N 13.00% Δn[589nm, 20°C]: 0.1369

[0340] ME2N.F 9.00% HTP [1 / μm, 20°C]: -13.87

[0341] ME3N.F 9.00% d·Δn[20°C, μm]: 0.85

[0342] ME4N.F 10.00% Twist[°]: 240

[0343] ME5N.F 5.00% V 10 [V]: 0.70

[0344] HP-3N.F 6.00% V 90 / V 10 : 1.119

[0345] HP-4N.F 5.00%

[0346] HP-5N.F 5.00%

[0347] CDU-2-F 9.00%

[0348] CDU-3-F 9.00%

[0349] CDU-5-F 8.00%

[0350] CCPC-33 4.00%

[0351] CCPC-34 4.00%

[0352] CCPC-35 3.00%

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Abstract

The invention relates to a liquid-crystalline medium, characterized in that it comprises one or more compounds of formula A and at least one compound of formula B, wherein R a , R b , Y, Z 1 ,Z 2 , L 1 , L 2 , L 3 , L 4 , L 5 , L 6 , L 7 and L 8 as defined in claim 1.

Description

field of invention [0001] The present invention relates to liquid crystal media and to twisted nematic (TN) and super twisted nematic (STN) liquid crystal displays with very short response times and good steepness and angle dependence, and to novel nematics for use therein type liquid crystal mixture. Background technique [0002] TN displays are known, see eg M. Schadt and W. Helfrich, Appl. Phys. Lett., 18, 127 (1971). STN displays are known, see for example EP0131216B1; DE3423993A1; EP0098070A2; M.Schadt and F.Leenhouts, 17th Freiburg Congress on Liquid Crystals (8.-10.04.87); K.Kawasaki et al., SID 87 Digest 391 ( 20.6); M. Schadt and F. Leenhouts, SID 87 Digest 372 (20.1); K. Katoh et al., Japanese Journal of Applied Physics, Vol.26, No.11, L1784-L1786 (1987); F. Leenhouts et al., Appl .Phys.Lett.50(21), 1468(1987); H.A.vanSprang and H.G.Koopman, J.Appl.Phys.62(5), 1734(1987); T.J.Scheffer and J.Nehring, Appl.Phys.Lett. 45 (10), 1021 (1984), M. Schadt and F. Leenhout...

Claims

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Application Information

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IPC IPC(8): C09K19/14G02F1/13C09K19/20C09K19/32C09K19/46
CPCC09K19/46Y10T428/10C09K2019/3071C09K2019/3422C09K2323/00
Inventor H·赫希曼D·齐默尔曼U·帕特瓦A·米尔费尔德S·舍恩M·维德纳
Owner MERCK PATENT GMBH
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