Liquid crystal device

Details Liquid crystal device Liquid crystal device

1992-11-02

1994-07-05

Thomas, Alexander S.

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

With charge transferring layer of specified composition

4284735, 428220, 359 75, G02F 11337

Patent

active

053266005

ABSTRACT:
A liquid crystal device is constituted by a pair of substrates and a ferroelectric liquid crystal disposed between the substrates. At least one of the pair of substrates has thereon an alignment film of a polyimide having a recurring unit of the following formula (I): ##STR1## wherein R.sub.1 denotes a tetravalent organic residue; and X.sub.1 -X.sub.8 independently denote an alkyl group having 1-15 carbon atoms, an alkoxy group having 1-15 carbon atoms, CF.sub.3 group, halogen or hydrogen atom with the proviso that at least one of X.sub.1 -X.sub.4 is not hydrogen atom and at least one of X.sub.5 -X.sub.8 is not hydrogen atom.

REFERENCES:
patent: 4367924 (1983-01-01), Clark et al.
patent: 4561726 (1985-12-01), Goodby et al.
patent: 4793692 (1988-12-01), Kamio et al.
patent: 4876330 (1989-10-01), Higashi et al.
patent: 5129727 (1992-07-01), Hanyu et al.

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