Patent ID: 8547310

Claim:
A liquid crystal display device comprising: an input unit for supplying pixel data to a pixel of a liquid crystal panel; an overdriving compensation unit outputting overdriving compensation pixel data using the pixel data input from the input unit; a selection unit selecting one of the pixel data input from the input unit and the overdriving compensation data input from the overdriving compensation unit; and a data selection control unit detecting whether the pixel data input from the input unit is motion image data to control the selection unit, wherein the data selection control unit comprises: a frame delay configured to delay the pixel data input from the input unit by one frame; a motion detector configured to detect a motion value between a current pixel data of a current frame from the input unit and a delayed pixel data of a delayed frame delayed from the frame delay, by calculating a number of horizontal direction motion pixels of the current pixel data and the delayed pixel data; and a comparator configured to compare the detected motion value with a reference motion value to generate and output one of a first and second logic control signals according to a result of the comparison, said generated and output first logic control signal indicating the pixel data is for a moving image, and the generated and output second logic control signal indicating the pixel data is for a still image, wherein the reference motion value corresponds to four motion pixels, wherein the data selection control unit controls the selection unit to select the overdriving compensation data input from the overdriving compensation unit by the first logic control signal if the motion value is the same as or greater than the reference motion value, wherein the data selection control unit controls the selection unit to select the pixel data input from the input unit by the second logic control signal if the motion value is less than the reference motion value, and wherein the motion detector is disposed directly between an output of the frame delay and an input of the comparator.