Patent ID: 7218295

Claim:
A pixel structure for active matrix OLED display, comprising: a switching transistor having a control terminal coupled to a scan electrode and a first terminal coupled to a data electrode; a driving transistor having a control terminal coupled to a second electrode of the switching transistor and a first terminal coupled to a power voltage; a OLED having an anode coupled to the second terminal of the driving transistor, and a cathode coupled to a common electrode; a storage capacitor coupled between the control terminal of the driving transistor and the common electrode, controlling turning on/off of the driving transistor according to data stored therein when the switch transistor is turned off; and a first transistor comprising a first terminal coupled to the anode of the OLED and a second terminal coupled to a first voltage and a control terminal coupled to a control signal, pulling down the potential at the anode of the OLED according to the control signal thereby inducing a reverse current to neutralize carrier accumulation inside the OLED, wherein the first voltage is variable and is determined by the data stored in the storage capacitor and the control signal is applied to turn on the first transistor during an N th frame and an N+M th frame, N and M are both positive integrals and M>1.