The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 06, 1994
Filed:
Sep. 10, 1993
Shuichi Matsui, Chiba, JP;
Yuichi Onji, Chiba, JP;
Atsuko Fujita, Chiba, JP;
Tomoyuki Kondo, Chiba, JP;
Yasuyuki Goto, Chiba, JP;
Chisso Corporation, Ohsaka, JP;
Abstract
A novel liquid crystal compound exhibiting a low driving voltage, a liquid crystal phase within a broad temperature range and a good compatibility with other known liquid crystal compounds at low temperatures is provided, which compound is expressed by the formula ##STR1## wherein R is H or a linear or branched alkyl group of 1-10C, X is H or F, and the vinyl group has a transconfiguration. This compound has a high dielectric anisotropy value for its relatively low viscosity and can drive liquid crystal display elements under a low voltage, and further exhibits a liquid crystal phase within a broad temperature range of about room temperature to about 200.degree. C., and exhibits a good compatibility with many other liquid crystalline compounds such as ester compounds, Schiff's base compounds, biphenyls, phenylcyclohexanes, heterocyclic compounds, fluorine compounds, etc., particularly a good compatibility at low temperatures, and hence can provide improved liquid crystal materials. Further, when the compound of the present invention is added as a component of liquid crystal materials, it is possible to notably broaden the use temperature range of liquid crystal compositions without raising the viscosity.