Patent ID: 8791884

Claim:
A method of driving an organic light emitting display, comprising: storing a brightness characteristic corresponding to emission time of an organic light emitting diode (OLED); generating accumulated data by adding together first data supplied in units of frames to each of a plurality of pixels, the accumulated data for each of the pixels corresponding to an emission time of the respective one of the plurality of pixels; determining a maximum brightness of a selected one of the pixels to which current first data is to be supplied based on the accumulated data corresponding to the selected pixel and the stored brightness characteristic; determining a maximum brightness corresponding to an emission time of a largest of the accumulated data among the accumulated data for each of the pixels; generating second data by controlling a bit value of the current first data using the maximum brightness of the selected pixel to which the current first data is to be supplied and the maximum brightness of the largest accumulated data, wherein controlling the bit value includes supplying fewer gray scales to least deteriorated pixels; and controlling a voltage value of a first power source supplied to the plurality of pixels, controlling including increasing the voltage value of the first power source in response to the maximum brightness of the largest accumulated data such that the pixel having the largest accumulated data has a brightness of up to an initial brightness thereof.