Display device

A display device comprising:

• a display panel comprising a pixel electrically connected to each of a data line, a first power line, a second power line, and a third power line;
• a power supply configured to provide a first power voltage to the first power line, and a second power voltage to the second power line;
• and
• a driver configured to provide a data voltage to the data line, and a third power voltage to the third power line,
• wherein the driver is configured to determine whether a sensing voltage measured at the second power line is out of a reference range, and to vary the data voltage from a first voltage range to be within a second voltage range different from the first voltage range.

A display device comprising:

• a display panel comprising a pixel electrically connected to each of a data line, a first power line, a second power line, and a third power line;
• a power supply configured to provide a first power voltage to the first power line, and a second power voltage to the second power line;
• and
• a driver configured to provide a data voltage to the data line, and a third power voltage to the third power line,
• wherein the driver is configured to determine whether a sensing voltage measured at the second power line is out of a reference range, and to generate a control signal when the sensing voltage is out of the reference range, and
• wherein the power supply is configured to interrupt the supply of the first power voltage in response to the control signal.