Reference voltage generating circuit and liquid display device using the same
US7746302B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 22, 2006 |
| Grant date | Jun 29, 2010 |
| Priority date | — |
| Expiry date | Feb 20, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0247
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A reference voltage generating circuit for an LCD device includes a main pumping section, a sub-pumping section, an input section inputting a level designating signal periodically and alternately designating a first reference level and a second reference level, and a control section alternately comparing an output voltage with the first and second reference levels in response to the level designating signal, wherein the control section outputs a first logic level and the main pumping section selectively lowers the output voltage in a fast negative pumping and the sub-pumping section selectively raises the output voltage in a slower positive pumping.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.