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. 14, 1997
Filed:
Mar. 31, 1993
Applicant:
Inventor:
Randall D Blanchard, Vista, CA (US);
Assignee:
Palomar Technologies Corporation, Carlsbad, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F / ; G02B / ; G03B / ;
U.S. Cl.
CPC ...
349 59 ; 385901 ; 353 74 ; 349 62 ; 349 96 ; 349112 ; 349137 ; 349159 ;
Abstract
A flat panel liquid crystal display module (34) has its front face adjacent a rear projection screen (40) and is illuminated by a pre-polarized collimated light source (10,14,16,18,22,26). Collimation is provided by either a Fresnel lens or a projection lens having a long focal length. The characteristics of the projection screen (40) provide narrowed vertical viewing angle and a fiber optic face plate (38) between the liquid crystal module (34) and the screen (40) provides sunlight rejection. The arrangement has greatly improved display brightness, with only minimal changes in contrast and color as viewing angle changes.