Patent ID: 6950082

Claim:
A display driving circuit comprising: a first electrode from which a data signal is output; a second electrode from which a scan signal is output; a capacitor having a first and second end with a voltage difference therebetween; a light emitting diode having an anode and cathode coupled to a first power supply providing a first voltage(Vss); a first switch having a first end coupled to the first electrode to receive the data signal and a second end coupled to the first end of the capacitor; a second switch having a first end coupled to a second power supply providing a second voltage(VDD) and a second end coupled to the anode of the light emitting diode and the second end of the capacitor; and a third switch having a first end coupled to a third power supply providing a third voltage(Vref) and a second end coupled to the second end of the capacitor; wherein each of the first, second and third switches further has a third end, the third ends of the first and third switch are coupled to the second electrode to receive the scan signal controlling the first and third switch, and the third end of the second switch is coupled to the first end of the capacitor.