Liquid crystalline material operable with low voltages and liqui

Details Liquid crystalline material operable with low voltages and liqui Liquid crystalline material operable with low voltages and liqui

1995-08-24

1998-02-17

Wu, Shean C.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

349 99, 349186, 349188, C09K 1930, G02F 113

Patent

active

057188394

ABSTRACT:
The liquid crystalline material of the present invention comprises a compound represented by the following structural formula (1), compounds represented by the structural formulas (1) and (2), compounds represented by the structural formulas (1) and (3), or compounds represented by the structural formulas (1), (2) and (3) in an amount of 90% by weight or more of the total amount of liquid crystalline components contained therein: ##STR1## wherein R represents a linear alkyl group, C.sub.n H.sub.2n+1 in which n is 3, 4, 5, 6 or 7, A represents --CH.sub.2 CH.sub.2 -- or direct bond (--) without --CH.sub.2 CH.sub.2 --, and B represents --CH.sub.2 CH.sub.2 -- or direct bond (--) without --CH.sub.2 CH.sub.2 --. Further, under the above conditions, the components are blended so that the nematic-isotropic transition temperature of the liquid crystalline material can be 55.degree. C. to 75.degree. C. A liquid crystal display panel of TN type obtained by using the thus-obtained liquid crystalline material is operable with a low voltage of 2.5 V or lower. A display panel of which power consumption is low can thus be attained.

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E.S. Lee et al., Control of the LC Alignment Using a Stamped Morphology Method and Its Application to LCDs, SID 93 Digest, 1993, pp. 957-960.
M. Schadt et al., Surface-Induced Parallel Alignment of Liquid Crystals by Linearly Polymerized Photopolymers, Japan, J. Appl. Phys. vol. 31, 1992, pp. 2155-2164.
M. Murata, et al., Alignment of Nematic Liquid Crystals by Polyimide Langmuir-Blodgett Films, Japan, J. Appl. Phys. vol. 31, 1992, pp. L 189-L 192.
H. Yokoyama et al., Temperature dependence of the anchoring strength at a nematic-liquid crystal-evaporated SiO interface, J. Appl. Phys. vol. 61(9), 1 May 1987, pp. 4501-4518.

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