Patent ID: 7880712

Claim:
An LCD device comprising: an image display part which includes liquid crystal cells formed in respective regions defined by a plurality of gate and data lines; a timing controller which modulates data inputted according to a first frame frequency to modulation data to realize a rapid response speed of liquid crystal, and outputs the modulation data or data to a second frame frequency; a gate driver which generates gate on voltages under control of the timing controller, and supplies the gate on voltages to the gate lines in sequence; and a data driver which converts the modulation data or data supplied from the timing controller to a data voltage, and supplies the data voltage to the data line in synchronization with gate on voltage, wherein the timing controller comprises: a frequency multiplier which multiples a first frame synchronization signal including a first vertically synchronized signal of the first frame frequency by two, and generates a second frame synchronization signal including a second vertically synchronized signal of the second frame frequency; a control signal generator which generates control signals to control the gate and data drivers by the second frame synchronization signal; and a data modulator which modulates the data to the modulation data, and outputs the modulation data or data to the second frame frequency, wherein the data modulator comprises: a frame signal generator which generates a frame signal of a first logic state corresponding to an odd-numbered frame and a frame signal of a second logic state corresponding to an even-numbered frame according to the second vertically synchronized signal; a modulation data generator which compares the data of current frame with the data of previous frame, and generates the modulation data and a selector which selects the modulation data or data according to the frame signal, and supplies the selected data to the data driver, wherein the selector selects the modulation data according to the frame signal of the first logic state, and supplies the modulation data to the data driver; and the selector selects the data according to the frame signal of the second logic state, and supplies the data to the data driver.