A display module includes: a substrate; and a plurality of pixel circuits provided on the substrate, wherein each pixel circuit of the plurality of pixel circuits includes: a light-emitting diode (LED); a driving line including a driving thin film transistor (TFT) connected to an anode terminal of the LED and configured to apply a driving current; a sensing line including a sensing TFT connected to the anode terminal of the LED and configured to sense the driving current; and a variable power supply connected to a cathode terminal of the LED and configured to change a voltage supplied while the driving current is sensed.