Patent ID: 9250508
Filing Date: 2016-02-02
CPC Classification: G02B,G03B

Claim Text:
1. A rear projection screen, comprising: an array of pin-hole apertures to pass display light incident from a first side of the rear projection screen through to a viewing side of the rear projection screen opposite the first side; and an array of concentrator structures surrounding the pin-hole apertures, the concentrator structures defining concentrating optical pathways each having an input aperture for collecting the display light and an output defined by a corresponding one of the pin-hole apertures to emit the display light; and a linear polarizer layer disposed to linearly polarize the display light prior to the display light being incident upon the array of concentrator structures, wherein the input apertures are larger than the pin-hole apertures, wherein the array of concentrator structures includes reflective interfaces disposed along surfaces of the concentrator structures that define the concentrating optical pathways, wherein the reflective interfaces each comprise a reflective scattering layer that randomizes the polarization of the display light upon reflection and wherein the linear polarizer layer is positioned to reflect a portion of the display light back reflected from the reflective scattering layer back into the concentrating optical pathways.