Patent ID: 7916111

Claim:
An apparatus for driving a liquid crystal display device, the device comprising: a liquid crystal panel having liquid crystal cells formed in regions defined by a plurality of gate lines and a plurality of data lines; a timing controller which analyzes a motion speed of an image in input data and converts the input data of one frame into different first and second double frame data or identical first and second double frame data according to the motion speed; a gate driver which sequentially supplies gate on voltages to the gate lines for each of first and second double frames under the control of the timing controller; and a data driver which converts the double frame data supplied from the timing controller into an analog video signal and supplies the analog video signal to the data lines under the control of the timing controller, wherein the timing controller comprises a data converter which converts the input data of one frame into the first and second double frame data using the modulated vertical synchronization signal and the motion speed, wherein the data converter comprises a double frame generator which generates the first and second double frame data using the input data of one frame, a moving image analyzer which analyzes the input data and generates a motion signal corresponding to the moving speed of the image; and an image modulator which differently sets gamma curves on a frame-by-frame basis according to the motion signal, and modulates the double frame data supplied from the double frame generator to supply the modulated double frame data to the data driver or bypasses the double frame data supplied from the double frame generator to the data driver, wherein the image modulator comprises a gamma curve setting unit which generates a bypass selection signal according to the motion signal corresponding to a still image or a gamma curve selection signal for differently setting the gamma curves on the frame-by-frame basis according to the motion signal corresponding to a moving image, a look-up table which registers a plurality of gamma curves for setting the gamma curve according to the motion speed, a gray scale generator which bypasses the double frame data to the data driver according to the bypass selection signal or modulates the double frame data by referring to the gamma curves registered in the look-up table corresponding to the gamma curve selection signal and supplies the modulated double frame data to the data driver.