METHOD FOR DRIVING LOCAL DIMMING OF A LIQUID CRYSTAL DISPLAY DEVICE AND AN APPARATUS THEREOF, PREVENTING THE FINAL GAIN VALUE AT PIXELS FROM EXCEEDING THE MAXIMUM VALUE AT PIXELS

摘要

PURPOSE: A method for driving local dimming of a liquid crystal display device and an apparatus thereof are provided to prevent color distortion due to gradation saturation by maintaining input color. ;CONSTITUTION: In a method for driving local dimming of a liquid crystal display device and an apparatus thereof, a local dimming value at blocks is determined(S6). A first gain value is calculates by using the local dimming value at blocks(S8) The maximum gain value at pixels is calculated as a second gain value(S10) The smaller one of first and the second gain value is selected as a final gain value(S12). Input video data is compensated by using the final gain value(S14) Backlight brightness is controlled at blocks.;COPYRIGHT KIPO 2011