HEAD MOUNT DISPLAY, MOVEMENT DETECTION DEVICE, MOVEMENT DETECTION METHOD AND VIDEO PRESENTATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a technology for detecting the movement of a user who is wearing a head mount display.SOLUTION: A head mount display 200 includes: a casing configured to store a presentation part for presenting a three-dimensional video, and positioned ahead of both eyeballs of a user 500 as an observer when it is mounted on the head of the observer; and an imaging element 204 disposed in the casing, and configured to image the external rays of light of the casing. The imaging element 204 is configured to, when the casing is mounted on the head of the observer, image the rays of light in a vertical downward direction to the casing and in the front of a line-of-sight direction of the observer.