Liquid crystal device having the orientation control films which

Details Liquid crystal device having the orientation control films which Liquid crystal device having the orientation control films which

1991-03-28

1992-07-14

Miller, Stanley D.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 85, 2522994, G02F 113, C09K 1956

Patent

active

051297272

ABSTRACT:
A ferroelectric liquid crystal device and apparatus having a pair of substrates with orientation control films of a fluorine-containing aliphatic polyimide or a fluorine-containing alicyclic polyimide. The fluorine-containing aliphatic polyimide or alicyclic polyimide has a structural unit expressed by the following general formula [1]: ##STR1## wherein R.sub.1 is a tetravalent organic residue and R.sub.2 is a divalent organic residue, at least one of R.sub.1 and R.sub.2 being an alicyclic or aliphatic organic residue containing fluorine and n is 0 or 1.

REFERENCES:
patent: 4367924 (1983-01-01), Clark et al.
patent: 4828754 (1989-05-01), Takehara et al.
patent: 4879059 (1989-11-01), Hanyu et al.

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