Patent ID: 8432352

Claim:
A method for driving a backlight driving unit for use with a display device comprising a display panel, comprising: dividing a display area of the display panel into a plurality of display regions; receiving a digital video data input from an external system; generating an average data value of a corresponding display region by calculating an average value of the digital video data supplied to the corresponding display region; generating a dimming signal based on the average data value, the dimming signal having a duty ratio corresponding to the average data value; comparing the dimming signal stored for a previous frame and the dimming signal for a current frame; determining whether a difference between the dimming signal for the previous frame and the dimming signal for the current frame exceeds a predetermined threshold; and modulating the duty ratio of the dimming signal for the current frame based on a combined average value of the average data value of the current frame and the average data value of the previous frame. upon determination that the difference does not exceed the predetermined threshold, forgoing modulation of the duty ratio of the dimming signal for the current frame.