Gradation voltage generator and display driving apparatus
US9135853B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 2013 |
| Grant date | Sep 15, 2015 |
| Priority date | — |
| Expiry date | Nov 7, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/028
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A gradation voltage generator for applying a gradation voltage according to gamma characteristics of a display panel includes a reference gamma selector that receives a maximum reference voltage, a minimum reference voltage, and a first reference voltage, and selects and outputs a maximum gamma voltage and a minimum gamma voltage from among voltages between the maximum reference voltage and the minimum reference voltage, wherein when the maximum reference voltage changes, the minimum gamma voltage is compensated by a difference the changed maximum reference voltage and the first reference voltage and a gamma curve controller that receives the maximum gamma voltage and the minimum gamma voltage, and generates and outputs a plurality of gradation voltages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.