Patent ID: 7852301

Claim:
A pixel circuit operates during a reset period, a programming period, and a display period sequentially, comprising: a light emitting diode; a first switch coupled between a first end of the light emitting diode and a ground terminal; a driving transistor having a drain coupled to a second end of the light emitting diode; a second switch coupled between a source of the driving transistor and a power source terminal; a capacitor coupled between a gate of the driving transistor and the ground terminal; and a third switch controlled by a first scan signal and coupled between the source and the gate of the driving transistor; wherein the first switch is turned off, the second switch is turned on, and the third switch is turned on during the reset period; the first switch is turned off, the second switch is turned off, and the third switch is turned on during the programming period; the first switch is turned on, the second switch is turned on, and the third switch is turned off during the display period.