Liquid crystal device having a polyimide alignment film substitu

Details Liquid crystal device having a polyimide alignment film substitu Liquid crystal device having a polyimide alignment film substitu

1992-06-15

1993-12-07

Hille, Rolf

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 76, 359 78, 359104, 428 1, G02F 113

Patent

active

052687805

ABSTRACT:
A liquid crystal device is formed by applying an alignment film comprising a fluorine-containing polyimide having a substituent of a fluorine atom or a fluorine containing group in its moiety originated from the carboxylic acid anhydride on at least one of a pair of substrates sandwiching a chiral smectic liquid crystal. Preferably, the respective substrates are provided with such fluorine-containing polyimide alignment films which have been rubbed in directions which are substantially parallel with each other and identical to each other or which intersect each other at a small counter-clockwise intersection angle. The liquid crystal device thus formed shows a high contrast display, particularly by multiplexing drive, free from after-image because of quick responsiveness.

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