Liquid crystal composition and display element including same

Details Liquid crystal composition and display element including same Liquid crystal composition and display element including same

1982-11-24

1985-11-05

Gron, Teddy S.

Compositions

Radioactive compositions

Nuclear reactor fuel

2522991, 2522995, 25229963, 25229966, 350350R, 340705, G02F 113, C09K 334

Patent

active

045509808

ABSTRACT:
A liquid crystal composition suitable for use as a host in a guest-host type liquid crystal display element including a dichroic dye as a guest is provided. The composition includes at least one liquid crystal compound represented by each of the following general formulas: ##STR1## and further includes at least one compound represented by the following general formulas: ##STR2## wherein R.sub.1 stands for a straight-chain alkyl group having 2 to 8 carbon atoms, R.sub.2 stands for a straight-chain alkyl group having 2 to 7 carbonm atoms, R.sub.5 stands for a straight-chain alkyl group having three carbon atoms, R.sub.6 stands for a straight-chain alkyl group having two or four carbon atoms, R.sub.7 stands for a straight-chain alkyl group having five carbon atoms, R.sub.8 stands for a straight-chain alkyl group having two carbon atoms, R.sub.9 stands for a straight-chain alkyl group having five carbon atoms, and R.sub.10 stands for a straight-chain alkyl group having three carbon atoms. The dichroic dye may be an azo or anthraquinone dye which is readily soluble in the composition. The compositions are highly resistant to environmental decay. A liquid crystal display element including these compositions and a liquid crystal display device including the display element are also disclosed.

REFERENCES:
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patent: 4130502 (1978-12-01), Eidenschink et al.
patent: 4154697 (1979-05-01), Eidenschink et al.
patent: 4228030 (1980-10-01), Cole, Jr.
patent: 4285829 (1981-08-01), Eidenschink et al.
patent: 4330426 (1982-05-01), Eidenschink et al.
patent: 4331552 (1982-05-01), Eidenschink et al.
patent: 4410445 (1983-10-01), Baur et al.
patent: 4469618 (1984-09-01), Hasegawa et al.

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