Patent ID: 7982708

Claim:
A display device comprising: a panel assembly including: a plurality of gate lines for transmitting a plurality of gate signals; a plurality of data lines for transmitting a plurality of data signals; and a plurality of pixels defined by the plurality of gate lines and the plurality of data lines; and a backlight unit including: a plurality of scan lines for transmitting a plurality of scan signals; a plurality of column lines for transmitting a plurality of light-emitting data signals; and a plurality of backlight unit pixels defined by the plurality of scan lines and the plurality of the column lines, wherein the backlight unit is configured to: calculate an average grayscale level of an image of a first frame; determine a first grayscale level according to the plurality of pixels corresponding to the panel assembly pixels; and apply a weight value corresponding to the average grayscale level to change the first grayscale level to a compensated grayscale level, wherein the weight value corresponding to the average grayscale level has a value smaller than 1 when the average grayscale level of the first frame is larger than a reference value, and the weight value corresponding to the average grayscale level has a value equal to 1 when the average grayscale level of the first frame is smaller than the reference value.