Patent ID: 8669930

Claim:
A liquid crystal display comprising: a frame processor that performs data compensation of at least one horizontal line carrying no data among horizontal lines of an input current frame; a timing controller that controls a driving operation of the frame compensated by the frame processor; and a data driver that supplies the frame compensated by the frame processor to a liquid crystal display panel under control of the timing controller, wherein the frame processor compares a current frame with previous frames, generates a compensation approval signal according to a comparison result and inserts compensation data into horizontal lines carrying no data among horizontal lines of the current frame in response to the compensation approval signal, and wherein data of the current frame and data of a second last frame to be supplied the liquid crystal display panel have the same polarity while the data of the current frame and data of a last frame to be supplied to the liquid crystal display panel have an opposite polarity, wherein the frame processor includes: a frame memory that stores the last frame and the second last frame that have been input before the current frame; a comparator that compares the current frame with the last and second last frames stored in the frame memory, generates a first compensation approval signal when the current frame and the second last frame are identical while the current frame and the last frame are different, and generates a frame pattern recognition signal when a regular frame pattern, which repeats regularly every 3 frames, is recognized, a history counter that receives the frame pattern recognition signal from the comparator and counts the number of occurrences of the regular frame pattern and generates a second compensation approval signal when the counted number of occurrences of the regular frame pattern is equal to a predetermined reference frame pattern count, and a data compensator that performs data compensation of at least one horizontal line carrying no data among horizontal lines of the current frame only the first compensation approval signal from the comparator and the second compensation approval signal from the history counter are inputted.