Display device and driving method thereof

A display device comprising:

• a first data driving chip comprising:
• a first data driving circuit to generate a first data signal;
• and
• a first sensor to sense a first overcurrent flowing in the first data driving circuit based on a first power current flowing in the first data driving circuit to generate a first signal;
• a second data driving chip comprising:
• a second data driving circuit to generate a second data signal;
• and
• a second sensor to sense a second overcurrent flowing in the second data driving circuit based on a second power current flowing in the second data driving circuit to generate a second signal;
• and
• a power controller to control first and second powers respectively supplied to the first and second data driving chips, and to block at least one of the first and second powers based on at least one of the first and second signals, wherein:
• the first sensor comprises a first comparator comprising a first input terminal to receive a first sensing voltage, a first reference terminal to receive a reference voltage, and a first output terminal to output a first comparison signal,
• the second sensor comprises a second comparator comprising a second input terminal to receive a second sensing voltage, a second reference terminal to receive the reference voltage, and a second output terminal to output a second comparison signal,
• the first comparison signal is generated based on the first sensing voltage and the reference voltage,
• the second comparison signal is generated based on the second sensing voltage and the reference voltage,
• the first sensor further comprises a first switch comprising a first input electrode connected to the first output terminal, a first output electrode connected to the power controller, and a first pull-down electrode to receive a pull-down voltage;
• and
• the second sensor further comprises a second switch comprising a second input electrode connected to the second output terminal, a second output electrode connected to the power controller, and a second pull-down electrode to receive the pull-down voltage.