Patent ID: 7459859

Claim:
A method for driving an organic light emitting diode circuit, the organic light emitting diode circuit comprising a first capacitor, a first thin film transistor (TFT), a second TFT and an organic light emitting diode (OLED), a first end of the first capacitor coupled to a gate of the second TFT, a first terminal of the first TFT receiving a first voltage, a second terminal of the first TFT coupled to a gate of the first TFT and the first end of the first capacitor, a first terminal of the second TFT receiving a second voltage, a second terminal of the second TFT outputting a pixel current to an anode of the OLED, a cathode of the OLED receiving a third voltage, the method comprising: turning off the OLED; supplying a fourth voltage to the first end of the first capacitor and a fifth voltage to a second end of the first capacitor in duration when the OLED is turned off such that voltage difference of the fourth voltage and the first voltage is large enough for turning on the first TFT; and removing the fourth voltage such that the first end of the first capacitor has a first voltage level due to an effect of the second TFT in duration when the organic TFT is turned off and the second end of the first capacitor remains at the fifth voltage; supplying a pixel voltage to the second end of the first capacitor in duration when the OLED is turned off and the first end of the first capacitor has the first voltage level; and turning on the OLED to output the pixel current to the OLED via the third TFT according to a voltage level of the first end of the first capacitor.