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:
Apr. 01, 1980
Filed:
Nov. 24, 1978
William A Rowe, Palatine, IL (US);
James W Schwartz, Deerfield, IL (US);
Zenith Radio Corporation, Glenview, IL (US);
Abstract
A color television receiver system has a cathode ray picture tube including an imaging faceplate having deposits of multi-color phosphor targets thereon. The tube includes a three-beam electron gun and a color selection aperture mask having apertures in registration with the targets. A beam-current-control signal is derived from the scansion circuit means of the receiver system; the amplitude of the signal varies monotonically as a function of the distance of the beams from the center of the faceplate. Means are provided for receiving the beam-current-control signal for modulating the receiver system luminance signal with the beam-current-control signal, which has such characteristics that the modulation causes a predetermined gradational reduction in beam current as a function of the distance of the beam from the center of the faceplate. The benefits include enhanced color purity and improved resolution, and energy savings.