Image quality improvement for liquid crystal display
US6727872B2 · kind B2 · utility
11Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2001 |
| Grant date | Apr 27, 2004 |
| Priority date | — |
| Expiry date | Mar 16, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2340/145
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A liquid crystal display (LCD) system, comprising a matrix of pixels, analyzes a video data stream for grayscale level jumps from extreme black to moderate gray levels. Transitions in grayscale levels are restricted between adjacent pixels so as to reduce image degradation due to fringe field effects. A memory, such as a shift register, may be used to store and then grayscale levels to be written to adjacent pixels are compared and if a difference between these grayscale levels exceed a certain value then at least one of the grayscale levels is modified.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.