Computer graphics processing and selective visual display system – Display driving control circuitry – Display power source
Reexamination Certificate
2005-12-20
2009-10-27
Hjerpe, Richard (Department: 2629)
Computer graphics processing and selective visual display system
Display driving control circuitry
Display power source
C345S094000
Reexamination Certificate
active
07609256
ABSTRACT:
A power supply circuit including: a high-potential-side voltage generation circuit which generates a high-potential-side voltage; a low-potential-side voltage generation circuit which generates a low-potential-side voltage; and a switch circuit which alternately supplies the high-potential-side voltage and the low-potential-side voltage to the common electrode as a common electrode voltage. The power supply circuit performs supply capability control of the common electrode voltage which changes at least one of current drive capability of the high-potential-side voltage generation circuit, an output voltage level of the high-potential-side voltage generation circuit, current drive capability of the low-potential-side voltage generation circuit, and an output voltage level of the low-potential-side voltage generation circuit according to a total value generated based on grayscale data for the number of dots of one scan line. The total value is a value obtained by sequentially adding a converted voltage value obtained by converting each piece of the grayscale data for the number of dots of one scan line according to a given grayscale characteristic.
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Harness & Dickey & Pierce P.L.C.
Hjerpe Richard
Seiko Epson Corporation
Sheng Tom V
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