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Two-Dimensional Dimming Algorithm using Light Spread Function  

Jung, Hye-Dong (전자부품연구원 RFID.USN융합연구센터)
Kang, Sung-Jin (한국기술교육대학교 정보기술공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.35, no.8B, 2010 , pp. 1204-1210 More about this Journal
Abstract
In this paper, in order to reduce the power consumption of LCD TV, we present a two-dimensional dimming algorithm for LED BLU(Backlight Unit) using light spread function and a pragmatic implementation method. In conventional two dimensional dimming algorithms, LED BLU is divided into MxN blocks and proper backlight luminance for each block is computed according to input image and used for dimming control. But, LED light of each block is diffused and affects the neighboring blocks so that luminance of each block becomes larger than that of intent. In the proposed algorithm, dimming control values are reduced by the amount of quantity affected by the neighboring blocks using light spread function, resulting in additional reduction of power consumption.
Keywords
Dimming; LCD TV; Backlight; LED; Spread Function;
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