Stage circuit and organic light emitting display device using the same

摘要

An organic light emitting display device having a stage circuit capable of creating a scan signal and a light emitting control signal. The stage circuit includes a control unit controlling a first node and a second node corresponding to signals of a first input terminal, a third input terminal, and a fourth input terminal, a first output unit supplying a light emitting control signal to a second output terminal corresponding to voltages at the first node and the second node, and a second output unit supplying a scan signal having different polarity than that of the light emitting control signal to a first output terminal corresponding to a signal of a second input terminal and voltages at the first node and the second node.

主权项

1. A stage circuit comprising:
a control unit controlling voltage at first node and a second node in response to a first clock signal input to a first input terminal, an input control signal input to a third input terminal, and a scan signal of a previous stage or a start signal input to a fourth input terminal; a first output unit supplying a light emitting control signal to a second output terminal in direct response to the voltages at the first node and the second node; and a second output unit having a second input terminal, the second output unit supplying a scan signal having different polarity than that of the light emitting control signal to a first output terminal corresponding to a second clock signal input to the second input terminal and in direct response to the voltages at the first node and the second node, wherein the first output unit includes:
a first transistor connected between a first power supply and the second output terminal, and having a gate electrode connected to the second node;a second transistor connected between the second output terminal and a second power supply having voltage set lower than that of the first power supply, and having a gate electrode connected to the first node; anda first capacitor connected between the second output terminal and the first node, and the second output unit includes:a third transistor connected between the first power supply and the first output terminal, and having a gate electrode connected to the first node;a fourth transistor connected between the first output terminal and the second input terminal, having a gate electrode connected to the second node; anda second capacitor connected between the first output terminal and the second node.