Television picture tube having enhanced resolution and color...

Details Television picture tube having enhanced resolution and color... Television picture tube having enhanced resolution and color...

H - Electricity

04

N

350/78

H04N 9/20 (2006.01) H04N 5/57 (2006.01)

Patent

CA 1123095

ABSTRACT OF THE DISCLOSURE 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. -2-

334601

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