Auxiliary gain control apparatus for a television receiver

Details Auxiliary gain control apparatus for a television receiver Auxiliary gain control apparatus for a television receiver

1987-04-06

1989-01-17

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358161, H04N 5208, H04N 557

Patent

active

047991070

ABSTRACT:
In a television receiver, an output signal from a binary rate multiplier (BRM) is used to control the amplitude of a video signal and thereby the contrast of a displayed image. Contrast control in response to ambient lighting conditions is accomplished by means of a light dependent resistor which modifies the output pull-up voltage of the BRM.

REFERENCES:
patent: 3928867 (1975-12-01), Lynch
patent: 4090216 (1978-05-01), Constable
patent: 4451849 (1984-05-01), Fuhrer
patent: 4511921 (1985-04-01), Harlan et al.
patent: 4573069 (1986-02-01), Lewis, Jr.
patent: 4633320 (1986-12-01), Willis

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