A projector includes: a projection unit; a detection light irradiation unit which radiates detection light onto a detection area which is set corresponding to a display area of the projection unit; an image pickup unit which receives reflected light of irradiation detection light reflected in the detection area; and a control unit which carries out detection of an operation of a non-light-emitting pointing element and detection of an obstacle blocking the detection light, and causes the projection unit to display information about the obstacle.