Ferroelectric liquid crystal device

Details Ferroelectric liquid crystal device Ferroelectric liquid crystal device

1993-05-05

1994-12-20

Stoll, Robert L.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

2522992, 359103, C09K 1934, C09K 1958, G02F 113

Patent

active

053743733

ABSTRACT:
A ferroelectric liquid crystal device having a pair of substrates each provided with voltage application means, an orientation control layer formed on at least one of the substrates, and a layer of ferroelectric liquid crystal composition formed between the pair of substrates, the device being characterized in that the ferroelectric liquid crystal composition comprises at least one compound (a) having an optically active group of the formula (I): ##STR1## and at least one compound (b) which is reverse to the compound (a) in the direction of a helical pitch induced in a nematic phase, the liquid crystal composition exhibiting at least a smectic C phase, smectic A phase and nematic phase at least 20 .mu.m in helical pitch.

REFERENCES:
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patent: 4973425 (1990-11-01), Kazuhiko et al.
patent: 5026506 (1991-06-01), Koden et al.
patent: 5151214 (1992-09-01), Koden et al.
Yoshino, K. et al. IEEE Transactions 23 (4) 639, 1988.

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