Patent ID: 7324276

Claim:
A projection screen comprising: a substrate; a reflective layer on the substrate, the reflective layer comprising reflective microstructures of about 0.5 μm to about 500 μm in size and arranged in a first pattern to reflect light at a first spatial frequency; and a refractive layer on the substrate, the refractive layer comprising refractive microstructures of about 0.5 μm to about 500 μm in size and arranged in a second pattern that is different from the first pattern to refract light at a second spatial frequency that is different than the first spatial frequency; wherein the projection screen has a front and a back and wherein the reflective layer and the refractive layer are arranged on the substrate such that light that is projected to the front of the projection screen passes through and is refracted by the refractive layer to impinge on the reflective layer and is reflected from the reflective layer back through the refractive layer to emerge from the front of the projection screen; and wherein the projection screen has a vertical axis and a horizontal axis and wherein the reflective layer and/or the refractive layer are configured to produce a vertical half angle of the light that emerges from the front of the projection screen that is less than a horizontal half angle of the light that emerges from the front of the projection screen.