Scan driver and display device including the same

A scan driver associated with a display device and comprising a plurality of stages concurrently outputting a plurality of scan signals in a concurrent compensation period and sequentially outputting the plurality of scan signals in a data writing period that is distinct from the concurrent compensation period, each of the plurality of stages comprising:

• a first transistor including a gate configured to receive a second clock signal, a first terminal configured to receive an input signal, and a second terminal connected to a first set node;
• a second transistor including a gate configured to receive the input signal, a first terminal configured to receive a first clock signal, and a second terminal;
• a third transistor including a gate configured to receive the second clock signal, a first terminal connected to the second terminal of the second transistor, and a second terminal connected to a first reset node;
• an eighth transistor including a gate connected to a second set node, a first terminal configured to receive a third clock signal, and a second terminal connected to an output node;
• a first capacitor including a first electrode connected to the second set node and a second electrode connected to the output node;
• a ninth transistor including a gate connected to a second reset node, a first terminal configured to receive a concurrent driving signal, and a second terminal connected to the output node;
• a second capacitor including a first electrode connected to the second reset node and a second electrode configured to receive the concurrent driving signal;
• a tenth transistor including a gate configured to receive a gate on voltage, a first terminal connected to the first set node, and a second terminal connected to the second set node;
• and
• an eleventh transistor including a gate configured to receive the gate on voltage, a first terminal connected to the first reset node, and a second terminal connected to the second reset node;
• wherein the tenth transistor is configured to allow an absolute value of a voltage of the first set node to be lower than an absolute value of a voltage of the second set node when the voltage of the second set node is boosted in the data writing period during which data signals are written to the display device, thereby relieving drain-source voltage stress for one or more transistors in the stage during the data writing period;
• and
• wherein the eleventh transistor is configured to allow an absolute value of a voltage of the first reset node to be lower than an absolute value of a voltage of the second reset node when the voltage of the second reset node is boosted in the concurrent compensation period during which threshold voltage compensation operations are performed in association with the display device, thereby relieving drain-source voltage stress for one or more transistors in the stage during the concurrent compensation period.

A display device, comprising:

• a display panel including a plurality of data lines, a plurality of scan lines, and a plurality of pixels connected to the plurality of data lines and the plurality of scan lines;
• a data driver configured to output data signals to the plurality of data lines;
• a scan driver including a plurality of stages concurrently outputting to the plurality of scan lines a plurality of scan signals in a concurrent compensation period and sequentially outputting the plurality of scan signals in a data writing period that is distinct from the concurrent compensation period, each of the plurality of stages comprising:
• a first input part configured to transfer an input signal to a first set node in response to a second clock signal;
• a second input part configured to transfer a first clock signal to a first reset node in response to the input signal and the second clock signal;
• a first output part configured to output a third clock signal as a respective scan signal in response to a voltage of a second set node;
• a second output part configured to output a concurrent driving signal as the respective scan signal in response to a voltage of a second reset node;
• a first stress relieving transistor connected between the first set node and the second set node;
• and
• a second stress relieving transistor connected between the first reset node and the second reset node;
• wherein the first stress relieving transistor is configured to allow an absolute value of a voltage of the first set node to be lower than an absolute value of the voltage of the second set node when the voltage of the second set node is boosted in the data writing period during which data signals are written to the display device, thereby relieving drain-source voltage stress for one or more transistors in the stage during the data writing period;
• and
• wherein the second stress relieving transistor is configured to allow an absolute value of a voltage of the first reset node to be lower than an absolute value of the voltage of the second reset node when the voltage of the second reset node is boosted in the concurrent compensation period during which threshold voltage compensation operations are performed in association with the display device, thereby relieving drain-source voltage stress for one or more transistors in the stage during the concurrent compensation period.