Nematic liquid crystal compositions
AssigneeDai Nippon Toryo Co., Ltd.
InventorsMashachika Yaguchi, Kenji Nakamura
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Abstract
When azo type and/or azoxy type compounds having specific structures are incorporated into a nematic liquid crystal material, a liquid crystal composition having positive dielectric anisotropy and a broad mesomorphic range extending above and below room temperature can be obtained. An electro-optical device in which a thin layer of this liquid crystal composition is filled and supported between two substrates can be used for light modulation and display.
Claims10
A nematic liquid crystal composition with positive dielectric anisotropy which comprises a mixture of 2 to 50% by weight of at least one of compounds represented by the formula, ##STR36## wherein X.sub.1 is halogen or a nitro group, X.sub.2 is hydrogen or --R or --OR radicals wherein R is an alkyl group of 1 to 18 carbon atoms, and Y is --N.dbd.N-- and 50 to 98% by weight of a nematic liquid crystal material.
Dependencies are inferred from the claim text.