Display device and display control method

A display device configured to display an image photographed by a camera mounted on a remotely controlled mobile object, comprising:

• a display part which is mountable on a head of a user and capable of displaying an image;
• a receiving part configured to receive a photographed image and position information of the mobile object transmitted from the mobile object;
• a position detection part configured to detect a position of the display part;
• a direction detection part configured to detect a direction of the display part;
• and
• a controller configured to:
• control image displaying on the display part;
• determine whether the mobile object exists in the direction of the display part detected by the direction detection part and within a particular range with respect to a position of the display part detected by the position detection part;
• and
• switch images to be displayed on the display part depending on whether the mobile object exists within the particular range or not.