Image display apparatus, display unit driver and image display method for the same
US7333081B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Jul 20, 2004 |
| Grant date | Feb 19, 2008 |
| Priority date | — |
| Expiry date | Aug 23, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An object of the present invention is to provide an image display technology with which high contrast can be stably obtained.In order to achieve the above object, the present invention changes the gain of a digital luminance signal by feeding back information on maximum and average luminance levels of the luminance signal, adjusts image contrast, and in accordance with the average luminance level detected from the feedback system, controls the illuminance of the backlight applied to a display unit. The control increases the illuminance of the backlight when the detected average luminance level is higher than the upper-limit value of a previously set reference range, and reduces the illuminance when the detected average luminance level is lower than the lower-limit value of the reference range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.