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Proceedings Paper

A novel local dimming algorithm for RGB-LED backlight
Author(s): Wei Huang; Zhong-Liang Jin; Yu Liu; Hai Ming; Qin-Ying Chou; Feng Li
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Paper Abstract

A large size RGB LED backlight unit and its local dimming algorithm are presented in this paper. The LED backlight unit and the LCD panel are controlled synchronously to enhance image contrast and improve power efficacy. Based on the image content, the backlight intensity is locally dimmed, and pixel values are compensated according to the backlight brightness distribution. In addition, a linear function algorithm typical for a backlight system is applied to remove the grid artifacts between LED blocks. Our newly developed 32" RGB LED backlight LCD-TV prototype shows that a static display contrast of over 20000:1 can be achieved. Compared with CCFL backlight LCD-TV, an average of about 30% of the power can be saved depending on the image content.

Paper Details

Date Published: 25 November 2009
PDF: 6 pages
Proc. SPIE 7509, 2009 International Conference on Optical Instruments and Technology: Optoelectronic Devices and Integration, 750903 (25 November 2009); doi: 10.1117/12.837576
Show Author Affiliations
Wei Huang, Suzhou Institute of Nano-tech and Nano-bionics (China)
Suna Displays Co., Ltd. (China)
Zhong-Liang Jin, Suzhou Institute of Nano-tech and Nano-bionics (China)
Suna Displays Co., Ltd. (China)
Yu Liu, Suzhou Institute of Nano-tech and Nano-bionics (China)
Suna Displays Co., Ltd. (China)
Hai Ming, Univ. of Science and Technology of China (China)
Qin-Ying Chou, Suzhou Institute of Nano-tech and Nano-bionics (China)
Suna Displays Co., Ltd. (China)
Feng Li, Suzhou Institute of Nano-tech and Nano-bionics (China)
Suna Displays Co., Ltd. (China)


Published in SPIE Proceedings Vol. 7509:
2009 International Conference on Optical Instruments and Technology: Optoelectronic Devices and Integration

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