Patent ID: 8035576

Claim:
A head-mounted display comprising: a display which has a display screen, the display screen including a display area for displaying video and a frame area around the display area; an optical system which enlarges the video displayed on the display screen and projects the enlarged video to the eyes of an observer who is wearing the head-mounted display on the observer's head; and a shield member which, being shaped like a frame, is superimposed over the display screen while being separated from the display screen by a distance L to shield the frame area, wherein the distance L satisfies L <2× ( B - A )×f/D where f is focal length of said optical system, D is a human pupil diameter determined statistically in advance, B is a width of the frame area, and A is a value statistically determined in advance as the width which will not be able to be shielded on a side of said frame area to be shielded by a side of said shield member.