Local dimming driving method and device of liquid crystal display device
US8670006B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2010 |
| Grant date | Mar 11, 2014 |
| Priority date | — |
| Expiry date | Sep 2, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A local dimming driving method of the LCD device includes divisionally driving all of a plurality of blocks of a backlight unit using a maximum luminance signal and measuring luminance per block, setting one of the plurality of blocks as a reference block, detecting luminance deviations between the reference block and the residual blocks, and setting an offset value per block for compensating for the detected luminance deviations per block, analyzing an input image in units of blocks corresponding to the plurality of blocks of a backlight unit respectively, detecting a representative value per block, and determining a dimming value per block according to the representative value per block, correcting the dimming value per block using the offset value per block, and controlling the luminance of the backlight unit on a block-by-block basis using the corrected dimming value per block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.