Ferroelectric liquid crystal materials and liquid crystal compos

Details Ferroelectric liquid crystal materials and liquid crystal compos Ferroelectric liquid crystal materials and liquid crystal compos

1993-07-08

1994-10-18

Wu, Shean

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229965, 25229966, 25229967, 560 76, 560 83, 359103, C09K 1920, C09K 1912, C07C 6976, G02F 113

Patent

active

053565649

ABSTRACT:
A liquid crystal composition containing an optically active or a ferroelectric liquid crystal compound represented by the following formula: ##STR1## wherein: A is selected from the group consisting of oxygen and sulfur; B is selected from the group consisting of --(CH.sub.2).sub.m -- and --(CH.sub.2).sub.n --O--; R is an alkyl or alkoxyl group having 1 to 22 carbons; R' is an alkyl group having 2 to 8 carbons or an ether group having 2 to 8 carbons; m is an integer from 0 to 4; n is an integer from 2 to 5; k is an integer of 0 or 1; l is an integer of 0 or 1; C and D are selected form the group consisting of hydrogen atom and halogen atoms, and * represents a chiral center. The ferroelectric liquid crystals of the present invention exhibit optical and chemical stabilities, high-speed switching characteristic and high spontaneous polarization, and thus are excellent materials for use in liquid crystal devices and liquid crystal light switching elements.

REFERENCES:
Device Applications of Ferroelectric Liquid Crystals. Importance of Polarization Charge Interactions (SPIE vol. 1080 Liquid Crystal Chemistry, Physics, and Applications (1989)) pp. 110-139. (Author: Zhuang et al.).
CA:118(21):212689m.
CA:118(12):113701c.

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