Head-mounted display apparatus and power saving control program for head-mounted display apparatus

A non-transitory computer readable medium storing a power saving control program for a head-mounted display apparatus, the program causing a control device of the head-mounted display apparatus to achieve:

• a function of displaying an image on an image display unit;
• a function of outputting a sound to a sound output unit;
• a determination function of determining a mounting state of the head-mounted display apparatus;
• and
• an output control function of turning ON/OFF display of an image and turning ON/OFF an output of a sound, based on the mounting state, wherein
• the determination function includes a function of determining whether the mounting state is a first state where the head-mounted display apparatus is mounted in a position in which an image is visually recognizable, and determining whether the mounting state is a second state where the head-mounted display apparatus is mounted on a head, and
• the output control function includes a function of
• turning ON display of an image and an output of a sound when the mounting state is the first state,
• turning OFF display of an image and turning ON an output of a sound when the mounting state is not the first state and is the second state, and
• turning OFF display of an image and an output of a sound when the mounting state is not the first state and is not the second state.