Patent ID: 8223116

Claim:
A liquid crystal display device comprising: a liquid crystal panel with a plurality of pixels arranged in a matrix; a backlight controller that generates at least two PWM signals for lights different from each other in luminance, the lights applied to at least two divisional regions divided from an image of one frame which is displayed on the liquid crystal panel; a backlight unit including at least two blocks defined opposite the divisional regions; and a backlight driver that supplies the blocks of the backlight unit with at least two drive signals corresponding to the PWM signals, wherein the backlight controller includes: an image analyzer that divides the image of one frame into the divisional regions by the number of the blocks defined on the backlight unit, and generates dimming addresses according to mean brightness values of the divisional regions; a dimming controller that retrieves dimming signals each opposed to the dimming addresses and generates the PWM signals each corresponding to the retrieved dimming signals; and at least one memory each that stores at least one dimming curve, configured with the dimming addresses and the dimming signals opposite to the dimming addresses, for the at least two divisional regions, wherein the dimming addresses are different from each other in number in the at least two divisional regions.