A timing controller for a display device includes a receiver, a first line memory, a serialization part, and first and second compensation parts. The receiver receives image data corresponding to unit pixels, and transmits the image data to the first line memory in a first order. The first line memory receives and stores the image data. The serialization part reads the image data in the first order from the first line memory and serially transmits the image data in a second order different from the first order. The first compensation part receives the image data in the second order and generates first compensation data of the image data, the first compensation data corresponding to a first gamma curve. The second compensation part receives the image data in the second order and generates second compensation data of the image data, the second compensation data corresponding to a second gamma curve.