Patent ID: 9646536
Date: 2017-05-09
CPC Classifications: G09G,H01L

Claim:
1. A driving method for a pixel circuit, the pixel circuit comprising: an organic light emitting diode; a first MOS transistor, comprising a gate electrode, a first electrode, and a second electrode; a second MOS transistor, comprising a gate electrode, a first electrode, and a second electrode, wherein the first electrode of the second MOS transistor is coupled to a first power supply; a third MOS transistor, comprising a gate electrode, a first electrode, and a second electrode, wherein the first electrode of the third MOS transistor is coupled to the second electrode of the second MOS transistor, and the second electrode of the third MOS transistor is coupled to a second power supply via the organic light emitting diode; a fourth MOS transistor, comprising a gate electrode, a first electrode, and a second electrode, wherein the first electrode of the fourth MOS transistor is coupled to the gate electrode of the second MOS transistor, and the second electrode of the fourth MOS transistor is coupled to the second electrode of the second MOS transistor; a fifth MOS transistor, comprising a gate electrode, a first electrode, and a second electrode; a sixth MOS transistor, comprising a gate electrode, a first electrode, and a second electrode; and a first capacitor, comprising first and second terminals, wherein the first terminal of the first capacitor is coupled to the second electrode of the first MOS transistor and is coupled to the second electrode of the fifth MOS transistor, and the second terminal is coupled to the gate electrode of the second MOS transistor and is diode coupled to the first electrode of the fourth MOS transistor, wherein the gate electrode of the first MOS transistor receives a first scanning signal, the first electrode of the first MOS transistor receives a data signal, the gate electrode of the third MOS transistor receives a control signal, the gate electrode of the fourth MOS transistor receives the first scanning signal, the gate electrode of the fifth MOS transistor receives the control signal, the first electrode of the fifth MOS transistor receives a reference voltage, the gate electrode of the sixth MOS transistor receives a second scanning signal, and the first electrode of the sixth MOS transistor receives the reference voltage, the method comprises: during an initialization stage, turning off the first MOS transistor and the fourth MOS transistor via the first scanning signal, turning off the third MOS transistor and the fifth MOS transistor via the control signal received by the gate electrode of the third MOS transistor, and turning on the sixth MOS transistor via the second scanning signal.