Patent ID: 8599193

Claim:
A liquid crystal display, comprising: a first over-driving (OD) compensation unit configured to compensate red data (R data) at a first OD rate; a second OD compensation unit configured to compensate green data (G data) at a second OD rate; and a third OD compensation unit configured to compensate blue data (B data) at a third OD rate, wherein the second OD rate is different than the first OD rate and the third OD rate, wherein the first over-driving (OD) compensation unit, the second OD compensation unit, and the third OD compensation unit comprise: a data compression and decompression unit configured to receive an input RGB signal of a current frame; and an RGB look-up table LUT configured to: store RGB data modulation values set according to a difference between previous frame RGB data and current frame RGB data, and modulate the input RGB signal of a current frame with a modulation value selected from the RGB LUT using the RGB data of the current frame and RGB data of a previous frame as LUT addresses, wherein the RGB LUT includes an R LUT, a G LUT and a B LUT, and wherein the data compression and decompression unit comprises: an R data compression and decompression unit connected to the R LUT; a G data compression and decompression unit connected to the G LUT; and a B data compression and decompression unit connected to the B LUT, each compression and decompression unit including: a data compressor configured to compress corresponding RGB data of the current frame, a frame memory connected to the data compressor, a first decompression unit connected to the data compressor, a second data decompression unit connected to the frame memory, a first operation unit connected to the first and second decompression units and configured to compare corresponding RGB data of the current frame, received from the first data decompression unit, with corresponding RGB data of the previous frame, received from the second data decompression unit, and a second operation unit connecting the first operation unit to the corresponding RGB LUT, the second operation unit configured to add or subtract a difference received from the first operation unit to or from uncompressed RGB data of the current frame to recreate the RGB of the previous frame and output the recreated RGB data of the previous frame to the corresponding RGB LUT.