Patent ID: 7513674

Claim:
A display system mountable to a planar sheet of transparent material having a front surface and a back surface, the transparent material having a critical angle of incidence at the front surface and the back surface sufficient to establish total internal reflection within the transparent material, the display system comprising: a light source mountable to the transparent material for injecting light into the transparent material at an angle of incidence at the front surface and the back surface that is greater than the critical angle of incidence to promote total internal reflection of the injected light within the transparent material; and a film having a front layer and a back layer, the front layer being mountable to the back surface of the transparent material, wherein the mounted film alters the critical angle of incidence to be greater than the angle of incidence of the injected light so as to extract injected light into the film from the transparent material, the front layer comprising a one-way see-through image pattern illuminable by the extracted light and the back layer comprises a light-blocking see-through pattern.