Computer graphics processing and selective visual display system – Display driving control circuitry – Display power source
Patent
1996-05-17
1998-07-07
Doon-Chow, Dennis
Computer graphics processing and selective visual display system
Display driving control circuitry
Display power source
345211, 345 52, G09G 500
Patent
active
057776113
ABSTRACT:
The present invention relates to an apparatus for sequentially controlling power to operate an LCD module through the internal circuit of an LCD controller, and comprises a timing and comparing means for receiving a timer value and a clock signal from an external circuit and outputting a match signal to control a time interval to sequentially generate said enable signals and to sequentially disable said enable signals; a display control means for controlling said display responsive to a display control signal, a write control signal and a reset signal from said external circuit; a power sequence FSM (finite state machine) for receiving the output of said display control means, said match signal from said timing and comparing means, said clock signal from an external circuit and a FSM reset signal, and outputting a clear signal to said timing and comparing means or outputting a first and second power enable signals and a control enable signal to said display; and a FSM reset signal generating means for receiving said reset signal from said external circuit and said first and second power enable signals and said control enable signal from said power sequence FSM, and outputting said FSM reset signal to said power sequence FSM in order to mask said first and second power enable signals and said control enable signal.
REFERENCES:
patent: 4872002 (1989-10-01), Stewart et al.
patent: 5323171 (1994-06-01), Yokouchi et al.
patent: 5404150 (1995-04-01), Murata
patent: 5576601 (1996-11-01), Koenck et al.
Doon-Chow Dennis
Hyundai Electronics Industries Co,. Ltd.
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