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:
Jan. 27, 1987
Filed:
May. 22, 1985
Applicant:
Inventors:
Jean-Frederic Clerc, Meylan, FR;
Francis Muller, Seyssinet, FR;
Assignee:
Commissariat a l'Energie Atomique, Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F / ;
U.S. Cl.
CPC ...
350346 ; 3503 / ; 350349 ;
Abstract
The display comprises a cholesteric liquid crystal film in which are embedded dye molecules between the two walls separated by a shim. One wall is at least partly covered by a reflecting coating reversing the polarization of a circularly polarized electromagnetic wave. The optical anisotropy .DELTA.n and the helix pitch p are such that the least absorbed wave on passing through the cell has an ellipticity equal to or greater than .pi./8.
Clerc, Jean-Frederic. (1987). Liquid crystal dichroic display with a high brightness contrast (U.S. Patent No. 4639090). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4639090
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile