Computer graphics processing and selective visual display system – Data responsive crt display control – Color display
Patent
1994-04-28
1997-02-25
Bayerl, Raymond J.
Computer graphics processing and selective visual display system
Data responsive crt display control
Color display
345150, 345154, G09G 128
Patent
active
056063393
ABSTRACT:
An amplifier (10) and method for controlling a saturation level of a color video signal has a circuit (33) connected to sum respective individual input color video signals to provide a summed output video signal (34). A first amplifier (14) receives one of the individual color video signals (R) as an input and produces an amplified individual color video signal output (15). A second amplifier (30) receives the summed output video signal (34) and produces a reference output signal (35), connected to be added to the amplified individual color video signal output (15). A user adjustable color saturation control circuit (25) controls a gain of the second amplifier (30), and inversely controls a gain of the first amplifier (14). In one embodiment, a contrast control circuit (20) is connected to control the gain of the first amplifier (14) with the user adjustable color saturation control circuit (25) being connected to the contrast control circuit (20) to control the gain of the first amplifier (14).
REFERENCES:
patent: 4183046 (1980-01-01), Dalke et al.
patent: 4553141 (1985-11-01), Flasza et al.
patent: 4719503 (1988-01-01), Craver et al.
Chiang Johnson
Chiu Timothy
Tsong Danny
Bayerl Raymond J.
Brady III W. James
Donaldson Richard L.
Luu Matthew
Texas Instruments Incorporated
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