Patent ID: 7623189

Claim:
A display device comprising: an image display unit having one surface and a second surface on which different first and second images are alternately displayed, respectively; a first optical system which leads first image light corresponding to the first image displayed on the first surface of the image display unit; a second optical system which leads second image light corresponding to the second image displayed on the second surface of the image display unit; and an image combining element on which the first and second image lights led by the first optical system and the second optical system are alternately incident, and which coincides first and second light paths of the first and second image lights, and emits combined image light of a combined image formed by combining the first and second images to an observation side, wherein the image display unit includes: a transmission type display element which controls transmission of light; and two surface light sources which are respectively arranged on both sides of the display element, which irradiate the display element with illumination lights, and which emit the first and second image lights transmitted through and exiting from the display element therethrough respectively toward the first and second optical systems in respective directions inclined to a normal line of the display element by a predetermined angle.