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:
May. 11, 1993
Filed:
Aug. 13, 1992
Applicant:
Inventors:
Ingrid E Heynderickx, Eindhoven, NL;
Dirk J Broer, Wilmington, DE (US);
Rifat A Hikmet, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K / ; G02F / ;
U.S. Cl.
CPC ...
359106 ; 25229901 ; 2522995 ; 359103 ; 359105 ;
Abstract
A liquid-crystal display device having a twisted nematic liquid-crystalline material is provided with a layer of an optically anisotropic material to obtain a colourless display device which is rich in contrast. The optically anisotropic material is a synthetic resin composition comprising a polymer network having a helicoidal order manufactured from a curable liquid-crystalline composition having a chiral dopant.