Power supply circuit, driver circuit, electro-optical...

Details Power supply circuit, driver circuit, electro-optical... Power supply circuit, driver circuit, electro-optical...

2007-10-09

2011-12-27

Hjerpe, Richard (Department: 2629)

Computer graphics processing and selective visual display system

Display driving control circuitry

Display power source

C345S054000, C345S094000, C345S209000, C345S211000

Reexamination Certificate

active

08085263

ABSTRACT:
A power supply circuit which outputs a common electrode voltage to a common electrode of an electro-optical device provided opposite to pixel electrodes through an electro-optical material includes a voltage booster circuit which generates a boost voltage boosted by a charge-pump operation in synchronization with a charge clock signal, and a common electrode voltage generation circuit which outputs a high-potential-side voltage or a low-potential-side voltage generated based on the boost voltage to the common electrode as the common electrode voltage. The charge clock signal has a rising edge and a falling edge in a period in which a sign of voltages between the pixel electrode and the common electrode are either positive or negative.

REFERENCES:
patent: 6137465 (2000-10-01), Sekine et al.
patent: 6307681 (2001-10-01), Aoki et al.
patent: 7683872 (2010-03-01), Jan et al.
patent: 2004/0095342 (2004-05-01), Lee et al.
patent: A-2004-252022 (2004-09-01), None

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