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:
Mar. 04, 1986
Filed:
Dec. 30, 1983
Applicant:
Inventor:
Ralph H Bradley, Kingsport, TN (US);
Assignee:
North American Philips Consumer Electronics Corp., New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
350128 ; 350126 ; 350129 ;
Abstract
A rear projection screen is disclosed which uses a front surface lenticular array to distribute light from projection light sources through a horizontal angle of virtually 180.degree. with uniform luminance. Each lenticular element of the array is characterized by having a height to width ratio of at least 3:2 and a pitch width to tip width ratio of at least 2:1. The lenticular array is further characterized as having the capability of having up to two-thirds of the front surface area black masked. When used in a color television system, the rear projection screen exhibits minimal color shift.