標題: Dynamic backlight gamma on high dynamic range LCD TVs
作者: Lin, Fang-Cheng
Huang, Yi-Pai
Liao, Lin-Yao
Liao, Cheng-Yu
Shieh, Han-Ping D.
Wang, Te-Mei
Yeh, Szu-Che
光電工程學系
顯示科技研究所
Department of Photonics
Institute of Display
關鍵字: backlight determination;contrast ratio;dual-panel;dynamic backlight;high dynamic range (HDR)
公開日期: 1-Jun-2008
摘要: A high dynamic range liquid crystal display (HDR-LCD) can enhance the contrast ratio of images by utilizing locally controlled dynamic backlight. We studied the HDR-LCD as a dual-panel display: a backlight module and a liquid crystal (LC) cell. As the gamma of the LC signal, the backlight module was also endowed with a gamma function to control the contrast ratio of HDR images. The inverse of a mapping function (IMF) method proposed as a dynamic gamma mapping curve for the backlight module, has been demonstrated to further improve in HDR image quality. By implementing the IMF method on a 37 '' HDR-LCD TV with 8 x 8 backlight zones, the image contrast ratio can reach similar to 20000:1 while maintaining high brightness, clear image detail, and an average power reduction of 30%.
URI: http://dx.doi.org/10.1109/JDT.2008.920175
http://hdl.handle.net/11536/8765
ISSN: 1551-319X
DOI: 10.1109/JDT.2008.920175
期刊: JOURNAL OF DISPLAY TECHNOLOGY
Volume: 4
Issue: 2
起始頁: 139
結束頁: 146
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