Computer graphics processing and selective visual display system – Display driving control circuitry – Display power source
Patent
1995-05-26
1998-03-24
Hjerpe, Richard
Computer graphics processing and selective visual display system
Display driving control circuitry
Display power source
361 89, 326104, 327142, G09G 300
Patent
active
057318123
ABSTRACT:
A display protection circuit includes a first OR gate which receives a first pulse at one input and a first clock signal at another input. A second OR gate receives the first pulse at one input and a second clock signal at another input. A first monostable multivibrator is coupled to the first OR gate and receives an output of the first OR gate and generates a second pulse in response thereto. A second monostable multivibrator is coupled to the second OR gate and receives an output of the second OR gate and generates a third pulse in response thereto. A first logic gate is coupled to the first and second monostable multivibrators and generate a fourth pulse which changes state in response to one of the first and second clock signals stopping transitioning for a first predetermined period of time.
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Hjerpe Richard
Lao Lun-Yi
National Semiconductor Corp.
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