Patent ID: 7154459

Claim:
A liquid crystal display (LCD), comprising: a data gray signal modifier for receiving gray signals from a data gray signal source, and outputting modification gray signals by considering gray signals of present and previous frames; a data driver for changing the modification gray signals into corresponding data voltages and outputting image signals; a gate driver for sequentially supplying scanning signals; and an LCD panel comprising a plurality of gate lines for transmitting the scanning signals; a plurality of data lines, insulated from and crossing the gate lines, for transmitting the image signals; and a plurality of pixels, formed by an area surrounded by the gate lines and the data lines and arranged as a matrix pattern, having switching elements connected to the gate lines and data lines, wherein the data gray signal modifier comprises: a frame storage device for receiving the gray signals from the data gray signal source, storing the gray signals for a period of one frame, and outputting the same; a controller for controlling writing and reading the gray signals of the frame storage device; and a data gray signal converter for considering the gray signals of a present frame transmitted by the data gray signal source and the gray signals of a previous frame transmitted by the frame storage device, and outputting the modification gray signals, wherein the data gray signal converter modifies the gray signals so as to output a modification data voltage V n ′ that satisfies the following equation | V n ′|=|V n |+f (| V n |−|V n−1 |) where the data voltage of the present frame is set to be V n and that of the previous frame to be V n−1 .