A look up table having the effect saving the design area is provided to save the design area by replacing the flip-flops and the multiplexers of the conventional look-up table with the memory device. A look up table comprises the followings: the look up table for outputting data compensation value stored in advance corresponding to image data which is inputted from outside; the data transmission part outputting as the address signal corresponding to image data inputted(210); the memory device outputting the homologous data compensation value stored in the address corresponding to the data compensation value stored in advance in case the address signal is applied(220). The memory device is controlled with the memory control signal applied from outside and performs Read Enable when the address signal is applied at the memory device.
