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:
Apr. 03, 1990
Filed:
Nov. 10, 1988
Yukiko Ichimura, Yamatokooriyama, JP;
Shuichi Kozaki, Nara, JP;
Fumiaki Funada, Yamatokooriyama, JP;
Hideo Saito, Ichihara, JP;
Kenji Furukawa, Yokosuka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Chisso Corporation, Osaka, JP;
Abstract
A liquid crystal display comprising two substrates and a nematic liquid crystal present between said two substrates, wherein each of said substrates comprises a glass plate, an electrode thereon and an aligning layer subjected to a molecular aligning treatment for a pretilt angle of 1.degree. to 30.degree. on the electrode, wherein an optically active material is added to the nematic crystal which has a positive dielectric anisotropy, wherein the average alignment direction in the longer direction of said liquid crystal molecule is twisted at an angle .phi. of 210.degree. to 300.degree. to impart a spiral structure to the liquid crystal and a ratio d/p of the spiral pitch p of the liquid crystal molecule and the liquid crystal thickness d are