Chiral smectic liquid crystal device having predetermined pre-ti

Details Chiral smectic liquid crystal device having predetermined pre-ti Chiral smectic liquid crystal device having predetermined pre-ti

1995-01-17

1997-07-08

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

349 2, 349135, 349172, G02F 11337, G02F 1141

Patent

active

056467044

ABSTRACT:
A liquid crystal device is formed by disposing a chiral smectic liquid crystal between a pair of substrates, each having thereon a group of electrodes for driving the chiral smectic liquid crystal and an alignment control film comprising a fluorine-containing polyimide provided with a uniaxial rubbing axis such that the uniaxial alignment axes provided to the pair of substrates intersect each other at a prescribed intersection angle. In the device, the liquid crystal molecules are aligned to provide a director forming a pre-tilt angle with the polyimide film surfaces of the substrates, whereby formation of splay alignment state in the chiral smectic liquid crystal molecules is suppressed. The liquid crystal device provides an improved contrast and also a broad drive margin.

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