Patent ID: 8665183

Claim:
A pixel driving method of an active matrix organic light emitting diode (OLED) display, wherein the active matrix OLED display comprises a data line, a first pixel and a second pixel, the first pixel and the second pixel being electrically coupled to the data line, each of the first pixel and the second pixel comprising an OLED, a storage capacitor, a driving transistor and a first switching transistor, the driving transistor being used for driving the OLED, a source electrode of the driving transistor being electrically coupled to a first terminal of the storage capacitor, a drain electrode of the driving transistor being electrically coupled to the OLED, a gate electrode of the driving transistor being electrically coupled to a source electrode of the first switching transistor, a drain electrode of the first switching transistor being electrically coupled to the data line; the pixel driving method being adapted for sequentially driving the first pixel and the second pixel, and during driving each of the first pixel and the second pixel comprising the steps of: in a resetting stage, supplying a first predetermined voltage to the first terminal of the storage capacitor, and supplying a second predetermined voltage to a second terminal of the storage capacitor; in a writing stage, enabling the data line to supply a data voltage to the gate electrode of the driving transistor through the first switching transistor, discharging the first terminal of the storage capacitor through the driving transistor and the OLED, and keeping the voltage of the second terminal of the storage capacitor at the second predetermined voltage; and in a light emission stage, supplying the first predetermined voltage again to the first terminal of the storage capacitor, switching off the first switching transistor, enabling the second terminal of the storage capacitor to be electrically communicated with the gate electrode of the driving transistor, and thereby the OLED is driven by the driving transistor; wherein during driving the second pixel, the pixel driving method further comprises the steps of: in the writing stage, before enabling the data line to supply the data voltage to the gate electrode of the driving transistor through the first switching transistor, enabling the data line to supply a precharge voltage to the gate electrode of the driving transistor through the first switching transistor, wherein the precharge voltage is supplied on the data line in a time period starting from the time of the first switching transistor of the first pixel being switched off in the writing stage to the time of the first switching transistor of the second pixel being switched on in the writing stage, and the precharge voltage is larger than the sum of the data voltage on the gate electrode of the driving transistor of the second pixel and the threshold voltage of the driving transistor of the second pixel.