Liquid crystal device

Details Liquid crystal device Liquid crystal device

1996-10-31

1998-10-13

Sikes, William L.

Liquid crystal cells, elements and systems

Particular excitation of liquid crystal

Electrical excitation of liquid crystal

349184, G02F 113

Patent

active

058220313

ABSTRACT:
A liquid crystal device is constituted by a pair of oppositely disposed substrates having opposing inner surfaces and opposing electrodes thereon, and a chiral smectic liquid crystal disposed between the opposing electrodes. The liquid crystal device has an effective optical modulation region and a peripheral region outside the effective optical modulation region. In the device, liquid crystal molecules in the peripheral region have a pretilt angle which is larger than a pretilt angle of liquid crystal molecules in the effective optical modulation region. As a result, a local pressure irregularity or a cell thickness change caused by a liquid crystal molecular movement along an extension of the device is effectively suppressed.

REFERENCES:
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patent: 5149461 (1992-09-01), Terashima et al.
patent: 5182662 (1993-01-01), Mihara
patent: 5204706 (1993-04-01), Saito
patent: 5204766 (1993-04-01), Taniguchi et al.
patent: 5276542 (1994-01-01), Iwayama et al.
patent: 5293534 (1994-03-01), Mihara
patent: 5381256 (1995-01-01), Hanyu et al.
patent: 5454976 (1995-10-01), Yagi et al.
Patent Abstracts of Japan, vol. 16, No. 330 (Jul. 1992) (P-1388).
Patent Abstracts of Japan, vol. 16, No. 511 (Oct. 1992) (P-1441).

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