Brightness control apparatus for a video signal processing syste

Details Brightness control apparatus for a video signal processing syste Brightness control apparatus for a video signal processing syste

1984-11-28

1986-07-08

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 65, 358168, H04N 920, H04N 557

Patent

active

045996415

ABSTRACT:
Brightness control apparatus for a color video monitor employing AC coupled video output driver stages is disclosed. A keyed amplifier provides a brightness determinative output pulse with an amplitude related to the setting of a brightness control coupled to the amplifier. The brightness pulse is coupled via separately adjustable brightness tracking circuits to control inputs of video signal clamps respectively associated with each of the color video signal paths between the driver stages and an image display device.

REFERENCES:
patent: 4044375 (1977-08-01), Norman
patent: 4082996 (1978-04-01), Hinn
patent: 4143398 (1979-03-01), Harwood et al.
patent: 4285008 (1981-08-01), Osawa et al.
patent: 4549214 (1985-10-01), Hinn
Partial Schematic Circuit Diagram of Color--II Video Monitor of Amdek Corp. (Oct. 1981).

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