39.4: Inverse of Mapping Function (IMF) Method for Image Quality Enhancement of High Dynamic Range LCD TVs
Fang‐Cheng Lin, Cheng‐Yu Liao, Lin‐Yao Liao, Yi‐Pai Huang, Han‐Ping D. Shieh, Po Jen Tsai, Te‐Mei Wang, Yao‐Jen Hsieh · SID Symposium Digest of Technical Papers · 2007
Abstract A high dynamic range liquid crystal display (HDR‐LCD) can much enhance the contrast ratio of the image on a locally controlled dynamic backlight. A novel method, inverse of mapping function (IMF), was demonstrated to further improve the HDR image quality from the information of each frame. By using the IMF method, the image contrast ratio in a 37″ HDR‐LCD TV was successfully improved to ∼20,000:1 while maintaining high brightness and clear image details. Besides, for mass production purpose, the backlight of a 37″ HDR‐LCD TV was divide into 8×8 zones to reduce hardware computation complexity.