Television picture tube having enhanced resolution and color pur

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

1978-11-24

1980-04-01

Martin, John C.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 65, 315386, H04N 918, H01J 2952, H01J 2956

Patent

active

041964462

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.

REFERENCES:
patent: 2613333 (1952-10-01), Bull
patent: 2698400 (1954-12-01), Schreiber

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