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:
Nov. 22, 1994
Filed:
Mar. 22, 1994
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
A liquid crystal composition containing an optically active or a ferroelectric liquid crystal compound represented by the following formula: ##STR1## wherein A can be either --CH.sub.2 -- or --CO--; R can be either an alkyl or alkoxyl group having 1 to 22 carbons: R' is an alkyl group having 2 to 8 carbons; x and y are integers of either 0 or 1, provided that when x=0, y.noteq.1; D can be a hydrogen or a halogen atom; and * represents a chiral center. The ferroelectric liquid crystals of the present invention exhibit optical and chemical stabilities, high-speed responsive, and high spontaneous polarization, and thus are excellent materials for use in making liquid crystal devices and liquid crystal light switching elements.