Computer graphics processing and selective visual display system – Display driving control circuitry – Display power source
Reexamination Certificate
2005-10-03
2010-06-29
Hjerpe, Richard (Department: 2629)
Computer graphics processing and selective visual display system
Display driving control circuitry
Display power source
C345S204000, C345S212000, C345S213000, C345S214000, C345S215000
Reexamination Certificate
active
07746336
ABSTRACT:
A power supply circuit for supplying a voltage to a counter electrode which faces a pixel electrode in an electro-optic device, an electro-optic material being disposed between the counter electrode and the pixel electrode, includes: an operational amplifier which drives the counter electrode; and an operational amplifier control circuit which controls at least one of a slew rate and an electric current drive capacity of the operational amplifier. The operational amplifier control circuit increases at least one of the slew rate and the electric current drive capacity of the operational amplifier, during a control time starting at a start timing of a write-in to the pixel electrode, and brings the slew rate and the electric current drive capacity of the operational amplifier back to the state prior to the control time after passing the control time.
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Elnafia Saifeldin
Harness & Dickey & Pierce P.L.C.
Hjerpe Richard
Seiko Epson Corporation
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