한국정보디스플레이학회:학술대회논문집
- 2008.10a
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- Pages.1156-1159
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- 2008
White LED Local Dimming Backlight for Aggressive Power Saving and Artifact Minimizing
- Yeo, Dong-Min (LCD Technology Center, LCD Business, Samsung Electronics Co., LTD.) ;
- Kwon, Yong-Hoon (LCD Technology Center, LCD Business, Samsung Electronics Co., LTD.) ;
- Kang, Eui-Jeong (LCD Technology Center, LCD Business, Samsung Electronics Co., LTD.) ;
- Park, Se-Ki (LCD Technology Center, LCD Business, Samsung Electronics Co., LTD.) ;
- Yang, Byung-Choon (LCD Technology Center, LCD Business, Samsung Electronics Co., LTD.) ;
- Kim, Gi-Cherl (LCD Technology Center, LCD Business, Samsung Electronics Co., LTD.) ;
- Jang, Tae-Seok (LCD Technology Center, LCD Business, Samsung Electronics Co., LTD.)
- Published : 2008.10.13
Abstract
Local dimming driving has advantages in reducing power consumption and improving contrast ratio(CR). In an LED backlight unit(BLU), many small LED blocks are implemented in 2-dimmensional space, and luminance of the blocks is controlled by a local dimming algorithm. However, such a BLU can induce various recognizable artifacts. A new novel algorithm is proposed for exact block luminance calculation to correct local dimming artifacts. Also we discuss modified low-gray-level dimming to achieve much aggressive power saving in a local dimming BLU system.