Data driver integrated circuit, display device comprising the same, and method of driving the same

A display device comprising:

• a display panel with a plurality of pixels connected to sensing lines;
• a current source that supplies an electrical current;
• a data driver integrated circuit (IC) having a sensing part that, in a sensing mode, samples a signal outputted from the pixels in response to a data voltage for sensing to output first characteristic data to an analog-to-digital converter, and, in a calibration mode, samples a calibration current to output second characteristic data to the analog-to-digital converter;
• and
• a timing controller that corrects input video data to be written to the pixels based on the first characteristic data and the second characteristic data,
• wherein the data driver IC generates N calibration currents by dividing the current supplied from the current source into N parts, where N is a natural number.

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

• generating N calibration currents by a current generator inside a data driver integrated circuit (IC) by dividing an external input source current into N parts, where N is a natural number;
• sampling the N calibration currents to produce an N number of digital data by a sensing part inside the data driver IC;
• receiving the N number of digital data and taking the average thereof by a timing controller;
• storing the calculated average value as second characteristic data representing the output characteristics of the analog-to-digital converter of the sensing part;
• and
• correcting video data based on the second characteristic data by the timing controller.