Computer graphics processing and selective visual display system – Display driving control circuitry – Intensity or color driving control
Reexamination Certificate
2006-02-28
2006-02-28
Lefkowitz, Sumati (Department: 2675)
Computer graphics processing and selective visual display system
Display driving control circuitry
Intensity or color driving control
C345S087000, C345S088000, C345S089000, C345S090000, C345S091000, C345S092000, C345S093000, C345S094000, C345S095000, C345S096000, C345S097000, C345S098000, C345S099000, C345S100000, C345S204000, C345S692000, C345S693000
Reexamination Certificate
active
07006114
ABSTRACT:
A standard voltage generating circuit generates standard voltages as many as the number of gradations. Then, the standard voltages are separated into standard voltages of high level and those of low level, by a selector circuit, regardless of polarities thereof. One of the standard voltages of high level thus separated by the selector circuit is selected by a Pch-arranged converting section of a D/A converting circuit. Then, the selected one of the standard voltages of high level is outputted as a gradation-display-use voltage. Meanwhile, One of the standard voltages of low level thus separated by the selector circuit is selected by an Nch-arranged converting section of the D/A converting circuit. Then, the selected one of the standard voltages of low level is outputted as a gradation-display-use voltage. With this arrangement, it is possible to attain miniaturization of a circuit and lower power consumption in a display apparatus which performs gradation display by a voltage modulation method.
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Beck Alexander S.
Harness & Dickey & Pierce P.L.C.
Lefkowitz Sumati
Sharp Kabushiki Kaisha
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