Patent ID: 8736962

Claim:
A display device, comprising a holding device structured to be fittable onto the head of a user; an image-generating module which generates an image and is operably coupled to the holding device; and a multifunction optical element including a coupling-in area and a coupling-out area attached to the holding device, the coupling in area being located separately from the coupling out area, wherein the generated image is coupled into the multifunction optical element via the coupling-in area, guided in the multifunction optical element by total internal reflection to the coupling-out area and coupled out via the coupling-out area such that when the holding device is fitted onto the head the user can perceive the coupled-out image superimposed on surroundings; wherein the coupling-out area comprises a Fresnel structure which receives light from the coupling-in-area via a folded beam path and couples the image out of the multifunction optical element and wherein the coupling-out-area has an imaging property.