A display device includes a first projector, a second projector, a first half mirror, a second half mirror and a reflection unit. The first projector is positioned with respect to the first half mirror such that the first rays are transmitted through the first half mirror in a given direction. The second projector is positioned with respect to the first half mirror such that the second rays are reflected by the first half mirror in the given direction. The reflection unit reflects the first rays and the second rays from the first half mirror to the second half mirror. The second half mirror reflects the first rays and the second rays from the reflection unit along the line of sight. The reflection unit further includes a reflector-projector that reflects the first rays and the second rays toward the second half mirror and projects third rays toward the second half mirror.