Patent ID: 8149186
Filing Date: 2012-04-03
Classification: G09G

Abstract:
1. A pixel, comprising: an organic light emitting diode; a first transistor controlling a current supplied to the organic light emitting diode; a pixel circuit configured to compensate a threshold voltage of the first transistor; and a compensating unit controlling a voltage of a gate electrode of the first transistor in order to compensate for deterioration of the organic light emitting diode, wherein the compensating unit includes: second and third transistors coupled in series between the organic light emitting diode and a first power source, the second and third transistors being commonly connected to a first node therebetween, first and second feedback capacitors coupled in series between the first node and a second node, the second node being coupled to the gate electrode of the first transistor, and a fourth transistor coupled between a predetermined voltage source and a third node that is common to the first and second feedback capacitors, wherein the pixel circuit includes: a fifth transistor having a gate electrode coupled to an i a sixth transistor having a gate electrode coupled to the i a seventh transistor having a gate electrode coupled to an i−1 an eighth transistor having a gate electrode coupled to an i a ninth transistor having a gate electrode coupled to the i a storage capacitor coupled between the second node and the first power source, wherein: the i the i