Display device and driving method thereof

A method of driving a display device, the method comprising steps of:

• applying a first voltage to a pixel through a first voltage output terminal connected to output terminals of a first output part and a second output part;
• outputting a first sensing value and a second sensing value by sensing a first current and a second current, which are output from the first output part and the second output part;
• comparing the first sensing value and the second sensing value with a first reference value and a second reference value having a level lower than the first reference value;
• and
• controlling shutdown of a power supply circuit connected to input terminals of the first output part and the second output part depending on the comparison result.

A display device comprising:

• a first output part;
• a second output part;
• a power supply circuit connected to input terminals of the first output part and the second output part;
• a first sensing part connected to an output terminal of the first output part and configured to sense an open state of the first output part;
• a second sensing part connected to an output terminal of the second output part and configured to sense an open state of the second output part;
• a third sensing part connected to the first sensing part and the second sensing part;
• a first voltage output terminal connected to the third sensing part;
• a plurality of pixels connected to the first voltage output terminal and configured to display an image;
• and
• a defect determination part configured to control shutdown of the power supply circuit by comparing a reference value with a third sensing value received from the third sensing part, when one of a first sensing value and a second sensing value, which are provided from the first sensing part and the second sensing part, indicates an open state.

A method of driving a display device, the method comprising steps of:

• applying a first voltage to a pixel through a first voltage output terminal connected to output terminals of a first output part and a second output part;
• outputting a first sensing value and a second sensing value by sensing open states of the first output part and the second output part;
• outputting a third sensing value by sensing a current value of the first voltage output terminal;
• comparing the third sensing value with a reference value when one of the first sensing value and the second sensing value indicates an open state;
• and
• controlling shutdown of a power supply circuit depending on the comparison result.