Luminance control device, display apparatus using the same, luminance control method and luminance control program
US8912998B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 2010 |
| Grant date | Dec 16, 2014 |
| Priority date | — |
| Expiry date | May 29, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Power consumption is cut down by reducing backlight light source luminance in accordance with the variability of luminance of the picture displayed on a display panel. A picture luminance detector calculates information (luminance information) representing luminance of the picture at intervals of a time unit. A picture luminance storage is a memory capable of storing the past records of luminance information within a fixed period of time (some seconds to some ten seconds). A processor is configured of a variation detector and a light source luminance determiner. Variation detector performs detection of the variability of picture luminance based on the luminance information on the current picture detected by picture luminance detector and the past records of picture luminance information stored in picture luminance storage to output variation information. Light source luminance determiner determines light source luminance based on the luminance information on the current picture detected by picture luminance detector and the variation information output from variation detector and outputs a light source information control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.