Level regulation circuit of common signal of LCD
US7825920B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 2009 |
| Grant date | Nov 2, 2010 |
| Priority date | — |
| Expiry date | Aug 5, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0247
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A level regulation circuit of a common signal of an LCD generates a first level voltage and a second level voltage according to a common voltage so as to generate a first common signal and a second common signal. Each pixel of the LCD includes two storage capacitors receiving the first common signal and the second common signal respectively. The level regulation circuit of the common signal uses an operational amplifier and one or two Zener diodes to generate the first level voltage and the second level voltage. The first level voltage and the second level voltage have the same voltage difference to the common voltage, so the flicker of the LCD can be reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.