Patent ID: 8553024

Claim:
A pixel driving circuit of an organic light emitting diode (OLED), comprising: a first switch, including: a first end arranged to receive a data signal; a second end; and a control end arranged to receive a scan signal; a capacitor, including: a first end coupled to a first voltage source, and; a second end coupled to the second end of the first switch; a transistor, including: a first end; a control end coupled to the second end of the capacitor; a second end; and a body; a second switch, including: a first end coupled to the first voltage source; a second end coupled to the first end of the transistor; and a control end arranged to receive a control signal; a third switch, including: a first end coupled to the body of the transistor; a second end coupled to a reference voltage source; and a control end arranged to receive the control signal, wherein when the third switch is turned on, the body of the transistor is coupled to the reference voltage source via the third switch and arranged to receive the reference voltage, thereby biasing the body of the transistor to a level lower than a level of the control end of the transistor, such that electrons of the body of the transistor are injected into a channel of the transistor for de-trapping holes and resetting the transistor; and an OLED, including: a first end coupled to the second end of the transistor; and a second end coupled to a second voltage source.