Double-Layer Projection Display System Using Scattering Polarizer Film

A new three-dimensional (3D) projection display system using two screens, one stacked in front of the other, has been developed. The front screen is made of a scattering polarizer film, and it either diffuse-reflects or transmits the incident light depending on the polarization state of the light. The near and far images are projected onto the front and rear screens, respectively, using light waves with mutually orthogonal polarization states. A clear image can be formed on the rear screen, and it is visible through the front screen over a wide range of viewing angles. It was found that the impression of depth is pronounced and that the eyestrain induced is comparable to that of two-dimensional (2D) display systems.