An electronic device according to an example embodiment may include a fingerprint sensor configured to perform at least one of a fingerprint detection function of detecting a fingerprint and an illuminance measurement function of measuring an illuminance value in a light receiving area. The electronic device may include a display configured to display an image on a panel based on a changed luminance The electronic device may include a processor configured to: activate a light receiving area of at least a portion of the fingerprint sensor based on whether the display is activated, and change a luminance of the display based on an illuminance value measured from the light receiving area in an off state in which pixels arranged on a panel of the display do not display an image.