Patent ID: 7710368

Claim:
An emission control driver receiving a first scan signal, a second scan signal, and a third scan signal, the driver comprising: a plurality of emission control signal generating circuits, wherein an emission control generating circuit comprises: a first switching device to transmit a first voltage to an output port in accordance with at least one of the first scan signal and the second scan signal; a second switching device comprising a gate, a source and a drain, the second switching device to transmit a second voltage to the output port in accordance with a voltage between the gate and the source; a third switching device to make the voltage at the gate and at the source of the second switching device uniform in accordance with at least one of the first scan signal and the second scan signal; and a capacitor to selectively turn on the second switching device in accordance with the third scan signal and to maintain a voltage between the gate and the source of the second switching device.