Patent ID: 8212764

Claim:
A method for driving a liquid crystal display device having a backlight, comprising: calculating a brightness component and color difference components based on digital video data; calculating and analyzing a histogram distribution of the digital video data using the brightness component; calculating brightness information based on the histogram distribution, the brightness information including a minimum brightness, a maximum brightness and an average brightness; generating a digital adaptive brightness control signal based on backlight driving data representative of the brightness information, the backlight driving data including a digital signal that controls a driving power, a driving voltage and a driving current of the backlight; converting the digital adaptive brightness control signal into a analog adaptive brightness control signal; decreasing the analog adaptive brightness control signal to generate a plurality of low brightness control voltages, the low brightness control voltages being different from one another; increasing the analog adaptive brightness control signal to generate a plurality of high brightness control voltages, the high brightness control voltages being different from one another; and selectively outputting one of the low brightness control voltages and the high brightness control voltages in response to an external brightness control signal.