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. 10, 1977
Filed:
Jul. 26, 1971
Applicant:
Inventor:
Alan Sussman, Princeton, NJ (US);
Assignee:
RCA Corporation, New York, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F / ; G02F / ; G09F / ;
U.S. Cl.
CPC ...
40 2 / ; 4013 / ; 3501 / ; 350267 ;
Abstract
A display device comprises a pair of transparent substrates sandwiching therebetween a liquid crystal material which is reversibly switchable between transparent and forward light scattering states. Disposed behind the device, between it and a source of illumination, is a louver means comprising a plurality of elongated vanes of a dull black, light absorbent color. The louver is so disposed relative to a viewer of the device and the source of illumination as to provide a continuous, black background for the device.