Contrast beam current limiting arrangement with secondary bright

Details Contrast beam current limiting arrangement with secondary bright Contrast beam current limiting arrangement with secondary bright

1991-12-16

1993-04-06

Peng, John K.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358 74, 358168, 358169, H04N 568, H04N 916, H04N 557

Patent

active

052008290

ABSTRACT:
A television system includes a picture tube beam current limiting arrangement which operates to reduce image contrast without affecting image brightness when the beam current exceeds a first threshold. However, if the user brightness control setting exceed the nominal (midrange) brightness control level, the image brightness is reduced when the beam current exceeds a second threshold which may be equal to or greater than the first. The image brightness is reduced only until the image brightness is within a small margin of the nominal image brightness level. Any further beam current limiting, for example to account for abnormal operating conditions of the television system are accomplished by further brightness reductions.

REFERENCES:
patent: 3873767 (1975-03-01), Okada et al.
patent: 4081838 (1978-03-01), Wheeler
patent: 4095518 (1978-06-01), Tuma et al.
patent: 4126884 (1978-11-01), Shanley, II
patent: 4137552 (1979-01-01), Serafini
patent: 4167025 (1979-09-01), Willis
patent: 4253110 (1981-02-01), Harwood et al.
patent: 4587554 (1986-05-01), Tamura et al.
patent: 4599643 (1986-07-01), Harlan
patent: 4633320 (1986-12-01), Willis
patent: 4689668 (1987-08-01), Sutherland, II et al.
patent: 4980756 (1990-12-01), Lagoni
patent: 4982287 (1991-01-01), Lagoni
"CTC 140 Color TV Chassis Technical Training Manual" copyright 1987 General Electric Company, available from Thomson Consumer Electronics Technical Training, Indianapolis, IN. p. 71.
A portion of the schematic for JVC model AV-37G2/AV-33G2 television receiver.

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