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:
May. 28, 2013
Filed:
Dec. 27, 2010
Ching-fu Hsu, Tai Chung County, TW;
Chih-chang Lai, Tai Chung County, TW;
Ching-Fu Hsu, Tai Chung County, TW;
Chih-Chang Lai, Tai Chung County, TW;
Wintek Corporation, Taichung, TW;
Abstract
A backlight modulation system includes a light source module, an image mapping unit, a histogram analysis unit, a backlight dimming unit, and an image reconstruction unit. An active display area of a panel is divided into multiple illumination areas. The image mapping unit performs an RGB-to-YUV transformation to acquire an original brightness factor for each pixel. The histogram analysis unit sums up the amount of pixels reaching a preset ratio in each illumination area to acquire reference brightness for each illumination area. The backlight dimming unit calculates out a dimming ratio and a reset brightness model according to the reference brightness. The image reconstruction unit resets original brightness factor of each pixel into an output brightness factor according to the reset brightness model, and outputs an image for an illumination area according to the output brightness factor and input image data.