Liquid crystal display device control circuit and liquid crystal display system, which adjust brightness of display image by using height distribution of gradations of input image
US8593391B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 2009 |
| Grant date | Nov 26, 2013 |
| Priority date | — |
| Expiry date | Sep 11, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A liquid crystal display control circuit includes a current reduction rate setting circuit analyzes original gradations of pixels in an input image signal and sets a current reduction rate; a light emitting element control circuit adjusts a drive current of the light emitting element in response to the current reduction rate; a gradation changing circuit generates a display image signal in which the original gradations are changed to the display gradations; and a liquid crystal panel control circuit sets a transmittance of the liquid crystal panel in response to the display gradations of pixels included in the image display signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.