Automatic screen condition control circuit in television set

Details Automatic screen condition control circuit in television set Automatic screen condition control circuit in television set

1991-05-17

1993-03-02

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358219, 358 28, H04N 5235

Patent

active

051914212

ABSTRACT:
An automatic screen condition control circuit in a television receiver for automatically maintaining a desirable display image on a television screen having proper levels of contrast, sharpness, brightness and color. The automatic screen condition control circuit comprises a receiver for receiving image signals, a luminance manipulator for controlling the levels of contrast, sharpness and brightness of the received image signals, a chrominance manipulator for controlling the color tints and the color signals of the received image signals, a sync detector for detecting a synchronizing signal from the received image signals, an auto-brightness limiter for limiting the brightness level from the luminance manipulator, a microprocessor responsive to the auto-brightness limiter for controlling the luminance and chrominance manipulators by providing storage data representative of components of contrast, sharpness, brightness, color tint, and colors to the luminance and chrominance manipulators in order to maintain the desirable display image on a television screen.

REFERENCES:
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patent: 4587554 (1986-05-01), Tamura et al.
patent: 4626892 (1986-12-01), Nortrup et al.
patent: 4679067 (1987-07-01), Belmares-Sarabia et al.
patent: 4710800 (1987-12-01), Fearing et al.
patent: 4727412 (1988-02-01), Fearing et al.
patent: 4839719 (1989-06-01), Hemsky et al.

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