Gray-scale improvement circuit and display system
US7667721B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2005 |
| Grant date | Feb 23, 2010 |
| Priority date | — |
| Expiry date | Jan 10, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A gray-scale conversion means (10) converts the gray scale of an input video signal (100) as necessary, and outputs the video signal with the converted gray scale. A statistical processing means (13) detects a statistical property of each field or frame of the input video signal; a scene change detection means (16) detects scene changes in the input video signal. A conversion characteristic determination means (22) determines the gray-scale conversion characteristic according to outputs of the statistical processing means (13) and the scene change detection means (16). The gray-scale correction increases contrast regardless of image content, and enables faster response to changes in image content.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.