A display device according to embodiments comprises: a display which includes a plurality of display modules; a sensor which measures light intensity to which the display is exposed; one or more driving units which drive the display; two or more current output units which are connected to each of the one or more driving units and output different currents; and a processor which controls the driving units to be connected to at least one of the two or more current output units, on the basis of the light intensity measured by the sensor.