An organic light emitting display including a scan
signal line forwarding a scan
signal, a data line sending a
data signal and a pixel coupled to the scan
signal line and the data line, the organic
light emitting diode display, wherein the pixel includes a first switching
transistor transmitting a
data signal from the data line in response to the scan signal of the scan signal line, a driving
transistor, coupled to the first switching
transistor, controlling
driving current from a first power source line, a storage
capacitor coupled between the driving transistor and the first power source line, an organic
light emitting diode, coupled between the driving transistor and a second power source line, displaying an image with the
driving current controlled by the driving transistor, an initial switching transistor, coupled between the storage
capacitor and an initial power source line, initializing the storage
capacitor, and a switching transistor for applying a
reverse bias, coupled between the second power source line and the initial power source line, applying a
reverse bias voltage to the organic
light emitting diode.