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:
Dec. 07, 1976
Filed:
Jul. 31, 1974
Applicant:
Inventor:
Shuji Maezawa, Suwa, JA;
Assignee:
Kabushiki Kaisha Suwa Seikosha, Tokyo, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F / ;
U.S. Cl.
CPC ...
3501 / ; 350150 ;
Abstract
A liquid crystal display device utilizes birefringent liquid crystals in a twisted mode in combination with a pair of polarizing plates the system being so mounted that the ordinary beam provides the display. The absorption of short-wavelength light is less for the ordinary beam than for the extraordinary beam, resulting in increased life-expectancy of the liquid crystal material, and therefore of the system.