Patent ID: 8044948

Claim:
A liquid crystal display comprising: a liquid crystal panel including a plurality of the data lines extending in a column direction, a plurality of the gate lines in a row direction, and a plurality of first to third color pixels displaying image based on signals received from the data lines and the gate lines and arranged in a matrix; a data driver configured to apply data voltages required for image display to the data lines; and a signal controller configured to receive a plurality of first to third color image data for the first to third color pixels, supply the received image data to the data driver, and generate control signals required for driving the liquid crystal panel, wherein the signal controller changes an inversion type when 1) dot blocks are repeated in a predetermined pattern, each dot block including one or more pairs of adjacent pixels in a row for at least one of the first to third color pixels, and 2) a magnitude of difference in gray between the pixels in each pair is larger than a critical value in each dot block, wherein the predetermined pattern includes a first dot block in a first row and a second dot block located in the same columns as the first dot block in a second row adjacent to the first row, wherein the first dot block has the gray differences of a first sign, and the second dot block has the gray differences of a second sign that is opposite to the first sign, wherein the signal controller determines whether each dot block is the first dot block or the second dot block, and wherein the signal controller comprises: a line counter for determining a row to which the block belongs; and a block counter for determining the position of the block in the row.