Patent ID: 7843412

Claim:
An apparatus for driving an LCD device, comprising: an LCD panel having a plurality of gate lines and a plurality of data lines; a data converter analyzing the difference in gray level between adjacent pixels of input video data and outputting modulated video data if the difference of gray level between adjacent pixels is larger than a reference value; a timing controller aligning and outputting the modulated video data, a gate driver supplying scan pulses to the gate lines of the LCD panel; and a data driver supplying the modulated video data to the data lines of the LCD panel, wherein the data converter includes a luminance/chrominance separator separating luminance data and chrominance data from the input video data, a delay unit delaying the chrominance data separated from the luminance/chrominance separator, a gray level converter outputting modulated luminance data having increased difference in gray level between a first and a second luminance data from the luminance/chrominance separator if the difference in gray level between the first and second luminance data is larger than the reference value, and a mixing unit generating the modulated video data by mixing the delayed chrominance data with the modulated luminance data and outputting the modulated video data to the timing controller.