Patent ID: 8115725

Claim:
A liquid crystal display device for compensating a pixel data in accordance with areas of a liquid crystal display panel and sub-frames comprising: a liquid crystal panel having a plurality of gate lines, a plurality of data lines, a plurality of color pixels, each of the color pixels including two sub-pixels which represent two different colors; a timing controller generating a sub-pixel data stream of two sub-frame format includes a first sub-pixel data for a first sub-frame and a second sub-pixel data for a second sub-frame, the first sub-pixel data and the second sub-pixel data having different gamma characteristics; a compensation unit operable to compensate the first sup-pixel data and the second pixel-data with different rates in accordance with areas of the liquid crystal panel and the two sub-frame; a panel drive circuit driving the sub-pixels on the liquid crystal panel and supplying the sub-pixels with the compensated first sub-pixel data for the first sub-frame and the compensated second sub-pixel data for the second sub-frame; and a backlight unit including a first LED array irradiating light by a first lighting control signal of the timing controller during the first sub-frame and a second LED array irradiating light by a second lighting control signal of the timing controller during the second sub-frame, wherein the rates vary depending on areas of the liquid crystal panel in a direction parallel to the data lines, and gradually increase such that the first and the second sub-pixel data are compensated with an increasing rates, wherein the compensated first sub-pixel data and the compensated second sub-pixel data are supplied to the sub-pixels in the direction parallel to the data lines from the top sides of the liquid crystal panel to the bottom side of the liquid crystal panel, wherein the timing controller separates one frame period into the first sub-frame and the second sub-frame, and displays a color image by driving the liquid crystal panel twice for one frame, wherein the compensation unit comprises an area decision unit generating an area selection signal by using a sub-horizontal sync signal and a sub-vertical sync signal from the timing controller.