Scan driver and display device having the same

A display device comprising:

• a display panel comprising a switching transistor connected to a scan line and a data line, an emission control transistor indirectly coupled to the switching transistor, and an organic light emitting diode coupled to emission control transistor;
• a timing controller configured to generate a first clock signal, a second clock signal that is different from the first clock signal, and a third clock signal that is different from the first and second clock signals;
• a scan driver configured to generate a plurality of scan signals based on the first, second, and third clock signals, configured to simultaneously output the plurality of scan signals during a simultaneous driving period, and configured to sequentially output the plurality of scan signals during a sequential driving period, the scan driver comprising a plurality of circuit stages cascade-connected with each other, each circuit stage comprising:
• a first input part configured to transfer a signal of a first node to first output part having a second node in response to a first clock signal;
• a second input part configured to transfer a carry signal to the first node in response to a second clock signal that is different from the first clock signal;
• a holding part configured to maintain a signal of the second node to a first driving voltage of a first level;
• the first output part configured to transfer a third clock signal that is different from the first and second clock signals to an output terminal in response to the signal of the second node;
• a second output part configured to transfer the first clock signal to the output terminal in response to a signal of a third node;
• and
• a simultaneous driving part configured to turn off the second output part in response to the third clock signal.