An electronic device includes a display and a proximity sensor arranged near a display surface of the display and configured to provide an output signal corresponding to a degree of proximity of an object to the display surface, and provides a position of the approaching object in a direction horizontal to the display surface. A user interface control unit has a first operational mode and a second operational mode, where in the first operation mode, the proximity of a user's hand from the display surface is monitored based on the output signal of the proximity sensor. In the second operational mode, a position of the user's hand in a direction horizontal to the display surface is detected within a detection target range and a user's operation is accepted according to the detected position of the user's hand.