Various embodiments of the present disclosure relate to a display system configured to rapidly recover a screen display without restarting even if power supply from the outside is temporarily interrupted. The display system therefor may comprise: a display that displays a screen on the basis of image information; and a power supply device that supports the display and supplies power to the display in a wireless manner, wherein, when the display is separated from the power supply device by more than a predetermined distance, the display may selectively operate in one of i) a power saving mode which lowers the luminance of at least a portion of the screen, and ii) an ultra-power saving mode which turns off at least a portion of the screen while maintaining a turned-on state.