Contrast control apparatus and contrast control method and image display
US8237688B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2007 |
| Grant date | Aug 7, 2012 |
| Priority date | — |
| Expiry date | May 9, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/16
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A contrast control apparatus includes a statistic distribution unit and a characteristic judging unit. The statistic distribution unit receives an image data to have a brightness histogram distribution in statistic. The brightness histogram distribution has a plurality of statistic nodes, respectively corresponding to a plurality of gray levels in statistic. The characteristic judging unit at least receives the brightness histogram distribution to determine a brightness adjusting signal for the image data, so as to proportionally adjust a brightness of a display light source. In addition, the characteristic judging unit also outputs a contrast curve, and the contrast curve represents a plurality of adjusted nodes, respectively corresponding to the statistic nodes. As a result, the brightness of the statistic nodes is changed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.