Patent ID: 8289253

Claim:
A method of a driving a display device, comprising: generating a first vertical start signal; calculating a current to display an image corresponding to one frame based on a data signal and generating a second vertical start signal delayed from the first vertical start signal by a first time interval, wherein the first time interval is determined based on the calculated current; sequentially outputting a first gate signal in response to the first vertical start signal; converting the data signal to output a display data voltage during a high period of the first gate signal; sequentially outputting a second gate signal in response to the second vertical start signal; and outputting a black data voltage during a high period of the second gate signal, wherein the generating of the second vertical start signal comprises: converting a gamma of the data signal; calculating a first current using a data signal corresponding to a present frame of the converted data signal; calculating a second current of the present frame based on a black data ratio of a previous frame and the first current; and comparing the second current and a predetermined reference current to decide a generation timing of the second vertical start signal.