Abstract: A liquid crystal display and a driving method thereof is provided for wide viewing angle for suppressing occurrence of lower gray level inversion. A timing controller stores a plurality of gray level correction values for averaging optical brightness level corresponding to gray level data in a memory and outputs an average gray level data reflecting the gray level correction values in association with input of a certain gray level data. A gate driver outputs a predetermined scanning signal sequentially to gate lines of the liquid crystal panel. A data driver receives the average gray level data and transforms it into a predetermined data voltage to be outputted. As a result, the lower gray level inversion problem in the TN mode can be overcome by representing brightness indicated by more than two gray level voltages as one gray level through an inversion method or a method by which brightness pattern for each frame is optimized and time-averaged.