Patent ID: 8068123

Claim:
A display device, comprising: a data modulator that is configured to: compare input data of a (m)th frame with input data of a (m−1)th frame and input data of a (m+1)th frame, m being a natural number not less than two, determine whether to insert one of black data, gray data, or a combination of the black data and the gray data into the (m)th frame at a period of the (m)th frame that precedes or follows a period of the (m)th frame that comprises the input data, the determination being based on the comparison of the input data of the (m)th frame, the input data of the (m−1)th frame, and the input data of the (m+1)th frame, and generate modulated input data of the (m)th frame based on the determination, the modulated input data of the (m)th frame comprising one of: the input data of the (m)th frame, and the input data of the (m)th frame and the black data, the gray data, or the combination of the black data and the gray data that is inserted into the (m)th frame; and a driver that supplies the modulated input data of the (m)th frame to a display panel, wherein the data modulator includes a buffer, first and second frame memories, a signal generator and a signal supplier that modulates the input data, wherein the input data of the (m)th frame is stored at the first frame memory and the input data of the (m−1)th frame is stored at the second frame memory, wherein the input data of the (m−)th frame, the input data of the (m)th frame and the input data of the (m+1)th frame are supplied to the buffer for modulating the input data of the (m)th frame, wherein the black data, the gray data, or the combination of the black data and the gray data is inserted into the (m)th frame based on a lookup table that corresponds to the comparison of the input data of the (m−1)th frame, the (m)th frame, and the (m+1)th frame, wherein the input data of the (m)th frame stored at the first frame memory is supplied to the signal generator and the second frame memory, and the input data of (m−1)th frame stored at the second frame memory is supplied to the signal generator, if the input data of the (m+1)th frame is supplied to the signal generator and the first frame memory, wherein the data modulator determines not to insert the black data, the gray data, or the combination of the black data and the gray data when the input data of the (m)th frame and the input data of the (m−1)th frame and the input data of the (m+1)th frame comprise the same data, wherein a gray level value of the gray data is higher than a gray level value of the black data and lower than a gray level value of the input data, and the gray data includes a plurality of gray level values which are divided into several levels so that different brightness be shown.