Grayscale reference generator
US6750839B1 · kind B1 · utility
30Cited by
5References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 2, 2002 |
| Grant date | Jun 15, 2004 |
| Priority date | — |
| Expiry date | Dec 6, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0276
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A grayscale reference generator provides correction voltages to respective connection points on a source driver which drives an array of LCD pixels, to compensate for pixel non-linearity. The generator includes a number of DACs equal to the number of correction voltages. In a preferred embodiment, an analog multiplexer connected between the DACs and the source driver's connection points selectively connects the DAC outputs to the connection points so that the source driver produces the necessary pixel drive voltages as the voltage polarity across the pixels is periodically reversed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.