Total internal reflection prismatically interleaved reflective film display screen

摘要

A reflective image display screen formed of two reflective sheets. The first sheet has a prismatic inward surface and an opposed outward viewing surface. The second sheet has a prismatic outward surface and an opposed inward surface. The second sheet's outward surface is prismatically interleaved with the first sheet's inward surface. An air gap substantially 0.5 mum thick is left between the prismatically interleaved surfaces. The prismatic surfaces each constitute a plurality of 60° included angle, parallel, linearly extending prisms. The first sheet's outward viewing surface and the second sheet's inward surface are flat. The sheets may be formed of a polycarbonate material having a refractive index of about 1.59.