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:
Aug. 23, 1983
Filed:
May. 06, 1981
Applicant:
Inventors:
Yoshiharu Nagae, Hitachi, JP;
Tetsuo Ito, Mito, JP;
Masaaki Kitajima, Hitachi, JP;
Hideaki Kawakami, Mito, JP;
Fumio Nakano, Hitachi, JP;
Hidetoshi Abe, Katsuta, JP;
Masato Isogai, Hitachi, JP;
Michio Ooue, Hitachi, JP;
Akio Mukoh, Hitachi, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F / ; C09K / ; G02F / ;
U.S. Cl.
CPC ...
350332 ; 25229901 ; 2522991 ; 350349 ;
Abstract
A color liquid crystal display device wherein a nematic liquid crystal to which a dichroic dye and an optically active substance have been added is used as the liquid crystal layer and the amount of said optically active substance added is so selected as to fall in a range making steep the threshold voltage characteristics of the liquid crystal.