Scan driver and organic light emitting display apparatus including the same

An organic light emitting display apparatus comprising:

• a display panel including a display area in which a pixel array is disposed and a non-display area disposed in at least one side of the display area;
• and
• a plurality of stages,
• wherein each of the plurality of stages comprises:
• a first node controller controlling a voltage of a first node by using first and second clock signals;
• a second node controller controlling a voltage of a second node by using the first and second clock signals, an output clock signal, and a start signal;
• a third node directly connecting to the first node through a tenth transistor;
• and
• an output buffer unit including a first transistor and a second transistor,
• wherein the first transistor outputs a gate low voltage as a scan signal while the second node is activated, and the second transistor outputs the output clock signal as the scan signal while the third node is activated,
• wherein the scan driver supplies a scan signal generated through each of the plurality of stages to a plurality of scan lines of the pixel array, and
• wherein a rising edge or a falling edge of the output clock signal is synchronized with a falling edge of the first clock signal or a falling edge of the second clock signal.