Liquid crystal device and liquid crystal apparatus

Details Liquid crystal device and liquid crystal apparatus Liquid crystal device and liquid crystal apparatus

1996-10-18

1999-08-03

Wu, Shean C.

Compositions

Liquid crystal compositions

2522994, 2522995, 2522996, 349126, 349128, 349129, 349134, 349135, 349136, 349171, 349172, 349184, 428 1, C09K 1952, G02F 11333

Patent

active

059321369

ABSTRACT:
A liquid crystal device is constituted by a pair of substrates each having thereon an electrode, and a smectic liquid crystal having a plurality of smectic liquid crystal layers disposed between the substrates. The smectic liquid crystal is disposed to form a first region wherein the smectic liquid crystal layers are aligned to have a layer inclination angle smaller than a calculated layer inclination angle based on a temperature-dependent layer spacing-changing characteristic or are aligned in a direction perpendicular to the substrates to form a bookshelf structure, and a second region wherein the smectic liquid crystal layers are aligned to form a chevron structure having a substantial layer inclination angle or having a layer inclination angle substantially equal to a calculated layer inclination angle based on a temperature-dependent layer spacing-changing characteristic. The liquid crystal device having the first an second regions described above is effective in improving a contrast ratio and a driven margin parameter.

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