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:
Sep. 09, 1986
Filed:
Jun. 25, 1984
Applicant:
Inventor:
Jun Nakanowatari, Miyagi, JP;
Assignee:
Alps Electric Co., Ltd., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F / ;
U.S. Cl.
CPC ...
350337 ; 350349 ;
Abstract
Disclosed is a liquid crystal display device in which a twisted nematic type liquid crystal display element is used as a light shutter and combined with color polarizer plates to provide color display, characterized in that a nematic crystal added with a black coloring matter is used and in that at least one of the polarizer plates has a degree of polarization of about 80% or less. Preferably, the rate of addition of the black coloring matter is limited to about 1.5% or less.