After a look-up table applies γ correction to each of R, G, and B signals, a multiplier multiplies a γ corrected signal by a gain. An adder adds an offset to an output of the multiplier and supplies a resultant gain/offset corrected signal to a display panel. Memories store entropy coded correction...http://www.google.com.tw/patents/US8022908?utm_source=gb-gplus-share專利 US8022908 - Display apparatus