Computer graphics processing and selective visual display system – Display driving control circuitry – Display power source
Reexamination Certificate
2008-07-29
2008-07-29
Hjerpe, Richard (Department: 2629)
Computer graphics processing and selective visual display system
Display driving control circuitry
Display power source
C345S055000, C345S063000
Reexamination Certificate
active
07405732
ABSTRACT:
A liquid crystal drive device having a differential-type input circuit including a differential amplification stage for receiving a differential signal and a buffer stage for generating an output signal on the basis of an output of the differential amplification stage, the liquid crystal drive device for receiving a signal of display data via the input circuit and outputting a signal for driving a liquid crystal panel on the basis of the display data, wherein a liquid crystal driving voltage VLCD larger than a power supply voltage VCC for logic to be supplied to the operation voltage buffer stage is supplied to the differential amplification stage of the input circuit. A standby function of interrupting an operation current of the differential amplification stage in a period where no display data is received is provided.
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Office Action dated Mar. 14, 2008, from counterpart Chinese Appln. No. 01820203.9.
Endo Masuhiro
Kinjo Arata
Kotera Kouichi
Oda Hitoshi
Ookado Kazuo
Hitachi ULSI Systems Co. Ltd.
Hjerpe Richard
Miles & Stockbridge P.C.
Renesas Technology Corp.
Shapiro Leonid
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