Liquid crystal orientation controlling membranes and liquid crys

Details Liquid crystal orientation controlling membranes and liquid crys Liquid crystal orientation controlling membranes and liquid crys

1992-09-16

1995-07-25

Thomas, Alexander S.

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

With charge transferring layer of specified composition

359 75, 359 78, G02F 11337

Patent

active

054360374

ABSTRACT:
A liquid crystal orientation controlling membrane, characterized by the polyimide membrane comprising the repeating unit represented by the formula: ##STR1## wherein Ar.sub.1 represents a diamine moiety which is selected from the group consisting of ##STR2## Ar.sub.2 represents tetravalent carboxylic acid moiety which is selected from the group consisting of ##STR3## Another invention is a ferroelectric liquid crystal element or an antiferroelectric liquid crystal element using the polyimide orientation controlling membrane mentioned above. The present liquid crystal element is used to a large picture display with high resolution, a TV picture display with wide viewing angle and a liquid crystal optical shutter.

REFERENCES:
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patent: 4367924 (1983-01-01), Clark et al.
patent: 5046822 (1991-09-01), Matsuda et al.
patent: 5046823 (1991-09-01), Mori et al.
patent: 5214523 (1993-05-01), Nito et al.
Yamamoto et al, Switching Properties in Antiferroelectric Liquid Crystals, Japanese Journal of Applied Physics 30:2380 Sep. 1991.

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