Display device, method of controlling display device, and program

A method of controlling a display device that includes a display unit through which outside scenery is transmitted and which displays an image such that the image is visually recognizable together with the outside scenery and a sound output unit which outputs a sound and that is used by being mounted on a body of a user, comprising:

• detecting a target of the user in a visual line direction;
• detecting a distance between the detected target and the user;
• detecting a state of the target visually recognized by the user through the display unit;
• and
• controlling the output of the sound according to the detected distance, including allowing the output of the sound according to the detected state of the target.

A non-transitory computer readable medium which can be executed by a computer controlling a display device that includes a display unit through which outside scenery is transmitted and which displays an image such that the image is visually recognizable together with the outside scenery and a sound output unit which outputs a sound and that is used by being mounted on a body of a user, the non-transitory computer readable medium causing the computer to function as:

• a target detection unit that detects a target of the user in a visual line direction;
• a distance detection unit that detects a distance between the target detected by the target detection unit and the user;
• and
• a sound control unit that controls the output of the sound from the sound output unit according to the distance detected by the distance detection unit,
• wherein the target detection unit detects a state of the target visually recognized by the user through the display unit based on the captured image of the imaging unit, and
• the sound control unit allows the sound output unit to output the sound based on the sound data acquired by the data acquisition unit according to the state of the target detected by the target detection unit.