Display Device and Method for Controlling Same

A display device, comprising:

• a display panel comprising a plurality of pixels;
• a data driver configured to drive a data line of the display panel;
• a gate driver configured to drive a gate line of the display panel;
• a timing controller configured to control driving of the data driver and the gate driver;
• and
• a power supply configured to supply a power voltage to the display panel;
• and
• a current scan circuit connected between the display panel and the power supply, and configured to measure magnitude of current flowing in the display panel when an image is displayed on the display panel,
• wherein the timing controller is configured to determine a representative current value based on a current value of each scan block, which is measured when a pattern image is displayed respectively on a plurality of scan blocks set on the display panel, to determine whether to update compensation data of each pixel included in each of the plurality of scan blocks based on the representative current value, to determine a gain value of each pixel included in each of the plurality of scan blocks based on the current value of each of the plurality of scan blocks when it is determined to update the compensation data, and to update the compensation data of each pixel based on the gain value of each pixel.