Data driver, display apparatus including the same and method of sensing threshold voltage of pixel using the same

A display apparatus comprising:

• a display panel configured to display an image based on input image data, the display panel comprising a plurality of data lines and a plurality of pixels connected to the plurality of data lines;
• and
• a data driver comprising a plurality of amplifiers configured to output data voltages to the plurality of data lines,
• wherein the plurality of amplifiers are configured to output the data voltages to the corresponding plurality of data lines in a writing mode, and
• wherein only one of the plurality of amplifiers is configured to output a sensing data voltage to the plurality of data lines in a sensing mode.

A method of sensing a threshold voltage of a pixel, the method comprising:

• outputting a plurality of data voltages to a plurality of corresponding data lines connected to a plurality of pixels using a plurality of amplifiers in a writing mode;
• outputting a sensing data voltage to the plurality of data lines using only one of the plurality of amplifiers in a sensing mode;
• and
• receiving a sensing signal using a plurality of sensing lines connected to the plurality of pixels in the sensing mode.