Patent ID: 8054258
Filing Date: 2011-11-08
Classification: G09G

Abstract:
1. A pixel, comprising: an organic light emitting diode between first and second power sources; a first transistor coupled to a scan line and a data line, the first transistor being configured to receive a data signal via the data line when a scan signal is supplied to the scan line; a storage capacitor configured to store voltage corresponding to the data signal received by the first transistor; a second transistor coupled to the first transistor and configured to control an electric current from the first power source to the second power source via the organic light emitting diode with respect to the voltage stored in the storage capacitor; and a compensation unit configured to adjust voltage at a gate electrode of the second transistor, the voltage adjustment being sufficient to compensate for a deterioration degree of the organic light emitting diode, wherein the compensation unit includes: a third transistor coupled to an anode electrode of the organic light emitting diode; a fourth transistor between the third transistor and a voltage source, the voltage source having higher voltage than voltage at the anode electrode of the organic light emitting diode; and a feedback capacitor coupled between a gate electrode of the second transistor and a common node of the third and fourth transistors.