Device and method for controlling video muting using a microcomp

Details Device and method for controlling video muting using a microcomp Device and method for controlling video muting using a microcomp

1997-01-22

1999-09-14

Saras, Steven J.

Computer graphics processing and selective visual display system

Display driving control circuitry

Display power source

315384, 348569, G06G 104

Patent

active

059530049

ABSTRACT:
A video muting control device using a microcomputer, comprising a video mute key for generating a video mute command upon activation by a user; a microcomputer connected to the video mute key, the microcomputer generating a blanking control signal in response to an input of the video muting command, a preamplifier for receiving RGB video signals, the preamplifier generating an amplified video signal in response to a clamping signal and a contrast control signal, and a video mute circuit for muting a video display in response to the blanking control signal by grounding any one of the RGB video signals, the clamping signal and the contrast control signal.

REFERENCES:
patent: 4918531 (1990-04-01), Johnson
patent: 5382981 (1995-01-01), Inaba et al.
patent: 5448262 (1995-09-01), Lee et al.
patent: 5463289 (1995-10-01), Song
patent: 5493340 (1996-02-01), Kim

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