The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 26, 2013
Filed:
Nov. 01, 2006
Toshiyuki Fujine, Sakura, JP;
Seiji Kohashikawa, Suzuka, JP;
Yuhya Sekiguchi, Tsu, JP;
Yuhichiro Yamaguchi, Yaita, JP;
Toshiyuki Fujine, Sakura, JP;
Seiji Kohashikawa, Suzuka, JP;
Yuhya Sekiguchi, Tsu, JP;
Yuhichiro Yamaguchi, Yaita, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
The present invention provides a display device capable of realizing an appropriate screen display luminance in accordance with a video feature quantity and brightness around and sufficiently reducing power consumption. A liquid crystal display apparatus () includes: a liquid crystal panel () for displaying a video by an input video signal; a backlight unit () as a light source for irradiating the liquid crystal panel (); and a brightness sensor () for detecting the brightness around the liquid crystal display apparatus (). According to the brightness detected by the brightness sensor (), luminance conversion characteristic defining the light emission luminance of the backlight for the feature quantity (such as APL) of the input video signal is changed. Here, the luminance conversion characteristic is changed so that the light emission luminance is reduced as the brightness around the liquid crystal display apparatus becomes darker and the position of the characteristic modification point as the point where the slope of the luminance conversion characteristic is changed is shifted in the direction of the feature quantity change. According to the obtained luminance conversion characteristic, the light emission luminance of the backlight is controlled.