Power supply circuit, driver circuit, electro-optical device, electronic instrument, and common electrode drive method
US8085263B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 9, 2007 |
| Grant date | Dec 27, 2011 |
| Priority date | — |
| Expiry date | Apr 13, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0247
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.