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:
Oct. 28, 1980
Filed:
Oct. 20, 1978
Applicant:
Inventors:
Cornelis Z van Doorn, Eindhoven, NL;
Jacobus J DeKlerk, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
340784 ; 350346 ; 340805 ;
Abstract
A liquid crystal display screen of the twisted nematic type comprising a liquid crystal having a dielectric relaxation and a high dispersion of .epsilon..sub.11 is used in a display device with a dual-frequency control. This structure enables the implementation of matrix-multiplex display devices having large pluralities of lines which must be successively scanned.