Patent ID: 8723843

Claim:
A pixel driving circuit comprising: a first transistor comprising a gate, a first terminal and a second terminal, wherein the first terminal of the first transistor is electrically coupled to receive an input signal, and the gate of the first transistor is electrically coupled to receive a first scanning signal; a capacitor comprising a first terminal and a second terminal, wherein the first terminal of the capacitor is directly electrically coupled to the second terminal of the first transistor; a second transistor comprising a gate, a first terminal and a second terminal, wherein the gate of the second transistor is electrically coupled to the second terminal of the capacitor, and the second terminal of the second transistor is electrically coupled to an anode of a light emitting diode; a third transistor comprising a gate, a first terminal and a second terminal, wherein the gate of the third transistor is electrically coupled to the second terminal of the capacitor and thereby the capacitor is electrically coupled between the second terminal of the first transistor and the gate of the third transistor, the first terminal of the third transistor is electrically coupled to the gate of the second transistor, the second terminal of the third transistor is electrically coupled between the second terminal of the second transistor and the anode of the light emitting diode, and the gate of the third transistor is further electrically coupled to the first terminal of the third transistor; a fourth transistor comprising a gate, a first terminal and a second terminal, wherein the gate of the fourth transistor is electrically coupled to receive a second scanning signal, the first terminal of the fourth transistor is electrically coupled between the second terminal of the first transistor and the first terminal of the capacitor, and the second terminal of the fourth transistor is electrically coupled between the second terminal of the second transistor and the anode of the light emitting diode; a fifth transistor comprising a gate, a first terminal and a second terminal, wherein the gate of the fifth transistor is electrically coupled to receive the second scanning signal, the first terminal of the fifth transistor is electrically coupled to receive a first voltage, and the second terminal of the fifth transistor is electrically coupled to the first terminal of the second transistor and thereby the fifth transistor is electrically coupled between the first voltage and the first terminal of the second transistor; and a cathode of the light emitting diode electrically coupled to receive a second voltage.