Patent ID: 8379004

Claim:
A pixel comprising: an organic light emitting diode configured to emit light in response to a data signal; a dummy organic light emitting diode in a non-light emitting state regardless of the data signal; a first transistor coupled to scan and data lines, the first transistor being turned on when a scan signal is supplied to the scan line; a storage capacitor configured to charge a voltage corresponding to the data signal supplied to the data line; a second transistor configured to supply current from a first power source to a second power source through the organic light emitting diode, wherein the current corresponds to the voltage charged in the storage capacitor; and a compensator coupled between the organic light emitting diode and the dummy organic light emitting diode, the compensator configured to change a voltage at a gate electrode of the second transistor according to deterioration of the organic light emitting diode, wherein the compensator comprises a capacitor, and wherein the capacitor is configured to capacitively couple the difference in threshold voltages of the organic light emitting diode and the dummy organic light emitting diode to the gate electrode of the second transistor.