Gamma voltage generator and source driver
US8384635B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 22, 2009 |
| Grant date | Feb 26, 2013 |
| Priority date | — |
| Expiry date | Aug 6, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0276
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A gamma voltage generator adapted in a source driver and a source driver adapted in a display panel are provided. The source driver comprises a DAC and a gamma voltage generator comprising a first and a second arithmetic circuit and a gamma voltage string. The first arithmetic circuit receives a first gamma reference voltage and at least one first tuning voltage to supply a first reference voltage. The second arithmetic circuit receives a second gamma reference voltage and at least one second tuning voltage to supply a second reference voltage. The gamma resistor string has two ends coupled to the first and the second arithmetic circuits to receive the first and the second reference voltages respectively to generate a plurality of gamma voltages. The DAC receives digital pixel data and the gamma voltages to generate a plurality of driving voltages to a pixel array of the display panel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.