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:
Jun. 01, 1976
Filed:
Apr. 15, 1974
Applicant:
Inventors:
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F / ; C09K / ; G02F / ;
U.S. Cl.
CPC ...
252299 ; 252408 ; 350150 ; 3501 / ;
Abstract
A nematic liquid crystal with positive dielectric anisotropy and a nematic liquid crystal with negative dielectric anisotropy are mixed such that the mixture is given a positive dielectric anisotropy and whenever any kind of pleochroic dye is dissolved therein, can effectively utilize its absorption anisotropy for display performances. A clear color-to-color contrast display is provided by employing the mixed liquid crystal added with pluralkinds of dyes of which at least one is a pleochroic dye and at least two are different in hue and in preformance characteristics of display device.