Apparatus and method for driving backlight using scanning backlight scheme, liquid crystal display device and its driving method using scanning backlight scheme
US9019195B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 2012 |
| Grant date | Apr 28, 2015 |
| Priority date | — |
| Expiry date | Dec 5, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2340/0435
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A backlight driving apparatus and method, and an LCD device using the same and a driving method thereof are discussed. The backlight driving apparatus includes a backlight unit, a backlight driver, and a backlight controller. The backlight unit includes a plurality of light sources irradiating light on a liquid crystal display panel which displays an image according to a response of liquid crystal. The backlight driver sequentially turns on the light sources in units of a frame, according to a backlight dimming signal having a duty-on period and a duty-off period. The backlight controller generates the backlight dimming signal having a frequency equal to or higher than a frequency of a frame sync signal for the liquid crystal display panel by analyzing the image, according to external duty-on information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.