LCD backlight dimming, LCD/image signal compensation and method of controlling an LCD display
US8514166B2 · kind B2 · utility
5Cited by
4References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 29, 2008 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | Jun 18, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of reducing power consumption in a liquid crystal display illuminated by a backlight device includes dimming the backlight and adjusting the intensity of the image to compensate for the dimmed backlight. A dimming factor for the backlight is based on a clipping point determining from the pixel intensity distribution of the image signal. The intensity of the image is adjusted based on the dimming factor, wherein a first tone mapping function is used to adjust pixel intensities below an intensity threshold and a second tone mapping function is used to adjust pixel intensities above the intensity threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.