Provided is a method of compensating reference data, including calculating touch compensation data in the n-th frame period by compensating touch raw data in the n-th frame period using the reference data in the (n−1)-th frame period that is stored in a memory, detecting touch candidate coordinates by analyzing the touch compensation data in the n-th frame period, generating reference compensation data in the n-th frame period by setting up a labeling block from the touch raw data corresponding to the touch candidate coordinates and by compensating the touch raw data included in the labeling block, not the touch raw data not included, and generating reference data in the n-th frame period by calculating an average value of the reference compensation data in the n-th frame period, and the reference compensation data in the (n−k)-th to (n−1)-th frame periods, stored in the memory.