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:
Sep. 16, 1974
Applicant:
Inventors:
Akio Moriyama, Katano, JA;
Masakazu Fukai, Nishinomiya, JA;
Hiroshi Tatsuta, Katano, JA;
Hiroaki Takahashi, Moriguchi, JA;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F / ; C09K / ; G02F / ;
U.S. Cl.
CPC ...
252299 ; 2323 / ; 252408 ; 350150 ; 3501 / ;
Abstract
An electro-optical element comprising a nematic liquid crystal composition and at least one compound represented by the formula: ##SPC1## Wherein R is an alkyl radical having from 4 to 20 carbon atoms. Said compounds are pleochroic dyes having a special function which differs from hitherto known dyes in their interaction with nematic liquid crystal molecules. The electro-optical element makes it possible to obtain a liquid crystal display device which exhibits the desired figure in color differing from background colors.