Liquid crystal composition, liquid crystal device and liquid cry

Details Liquid crystal composition, liquid crystal device and liquid cry Liquid crystal composition, liquid crystal device and liquid cry

1996-01-26

1998-01-20

Wu, Shean C.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229962, 25229963, 25229901, 348134, 428 1, C09K 1934, C09K 1932, C09K 1930, G02F 113

Patent

active

057104336

ABSTRACT:
A liquid crystal composition contains a mesomorphic compound represented by the following formula (A): ##STR1## wherein R.sub.1 and R.sub.2 independently denote a linear or branched alkyl group having 1-18 carbon atoms; X.sub.1 and X.sub.2 independently denote a single bond, --O--, --CO--O-- or --O--CO--; and A.sub.1 denotes a single bond, ##STR2## or ##STR3## and A.sub.2 denotes ##STR4## or ##STR5## and a mesomorphic compound represented by the following formula (B): ##STR6## wherein R.sub.3 denotes a linear or branched alkyl group having 1-18 carbon atoms; X.sub.3 and X.sub.4 independently denote a single bond, --O--, --CO--O-- or --O--CO--; m is an integer of 3-16; and A.sub.3 denotes ##STR7## or ##STR8## The liquid crystal composition may preferably be formulated as a chiral smectic liquid crystal composition. The liquid crystal composition is useful in providing a liquid crystal device using the liquid crystal composition with a good alignment characteristic, a good drive characteristic, and a high and stable contrast ratio.

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Nakano et al., Japanese Journal of Appl. Phys. 19 (10), 2013-2014 (1980).
K.Miyasato et al., Japanese Journal of App. Phys. 22(10), L661-L663 (1983).

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