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. 01, 1994
Filed:
Aug. 17, 1992
Applicant:
Inventor:
Gopal K Srivastava, Arlington Heights, IL (US);
Assignee:
Zenith Electronics Corp., Glenview, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
348805 ; 348555 ; 348687 ; 348913 ;
Abstract
A brightness management arrangement for equalizing the aging of the phosphor screen of a 16:9 aspect ratio cathode ray tube used for 4:3 aspect ratio video displays provides low level illumination of the unused portions of the phosphor screen when displaying 4:3 aspect ratio video. The unused end panels are divided into three sections with the illumination level of each section being determined by the illumination levels of adjacent areas of the 4:3 video display.