Patent ID: 7683863

Claim:
An organic light emitting diode (OLED) pixel circuit, comprising: a first switch, having a first end for receiving a data signal and a second end, and turned on or off under control of a first scan signal; a second switch, having a third end coupled to the second end and a fourth end, and turned on or off under control of a second scan signal; a first p-type metal oxide semiconductor (PMOS) transistor, having a source coupled to a high voltage, a drain coupled to the fourth end of the second switch and a gate coupled to the second end; a second PMOS transistor, having a gate coupled to the second end and a source coupled to the high voltage; a capacitor, coupled to the gate of the first PMOS transistor and the high voltage; and an OLED, having a positive end coupled to a drain of the second PMOS transistor, and a negative end coupled to a low voltage.