It is an object of the present invention to display unnaturalness-free images without showing an observer repetitive images in accordance with the observer's viewpoint.A light beam control element 101b limits a viewing area of images composed of light emitted from a light source array 101a. Here, a terminal position detection sensor 102 or an observer position detection sensor 103 detects a relative positional relationship between the observer's eye observing the image formed by the light emitted from the light source array 101a, and the light source array 101a and the light beam control element 101b. Based on the positional relationship detected by these sensors, a display image control device 104 controls the light source array 101a so as to change display contents of the light forming the image with the viewing area limited by the light beam control element 101b.