Patent ID: 8279243

Claim:
A pixel circuit comprising: a light emitting diode having an anode that receives a driving current, and a cathode that is adapted for coupling to a first voltage source; and a driving circuit including: a switch unit operable in one of an on state and an off state according to a scan signal, and adapted for permitting transfer of a data signal when operating in the on state; a capacitor having a first end that is coupled electrically to said switch unit, and a second end; a first transistor having a first terminal that is adapted for coupling to a second voltage source, a second terminal that is coupled electrically to said second end of said capacitor and to said anode of said light emitting diode, and a control terminal that is coupled electrically to said first end of said capacitor; and a second transistor having a first terminal that is adapted for coupling to the second voltage source, a second terminal coupled electrically to said second terminal of said first transistor, and a control terminal that is adapted for receiving a bias voltage; wherein each of said first and second transistors operates simultaneously in the linear region.