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. 11, 1999
Filed:
Mar. 04, 1993
Applicant:
Inventors:
Robert L Donofrio, Saline, MI (US);
Andre A van der Voort, Son en Breugel, NL;
Assignee:
Philips Electronics North America Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
313112 ;
Abstract
The bulls-eye effect produced in the projected image by projection television cathode ray display tubes with convexly curved faceplates and multi-layer interference filters is compensated by using darkened or tinted glass. Since the faceplate glass is thicker in the center, more attenuation of the light output occurs there than at the edges of the display window where the glass is thinner, resulting in improved luminance uniformity of the display.