Patent ID: 7573445

Claim:
A driving method of a light emitting device comprising a first scan line driver circuit for inputting a first signal to a first scan line and a second scan line driver circuit for inputting a second signal to a second scan line wherein the second scan line driver includes a circuit for applying a scan voltage and a NAND circuit electrically connected to the circuit for applying a scan voltage, the method comprising the steps of: inputting a clock signal into the circuit for applying the scan voltage; inputting a control signal into the NAND circuit; turning on a light emitting element when a sustain period starts in accordance with the first signal; repeatedly switching a conduction state between the light emitting element and a power supply line in synchronized timing with a frequency of the control signal during the sustain period, so that a current is directly applied from the power supply line to the light emitting element; and turning off the light emitting element when the sustain period terminates in accordance with the second signal.