Patent ID: 6567215
Filing Date: 2003-05-20
Classification: G03B

Abstract:
A rear projection screen comprising:a beaded screen construction comprising a substrate transmissive to visible light, a visible light absorptive material disposed on the substrate, and a layer of microbeads embedded in the light absorptive material to leave a portion of the microbead layer exposed; wherein the beaded screen construction has a maximum theoretical throughput, and nT defines a microbead index of refraction at which the maximum theoretical throughput is attained, and wherein the layer of microbeads comprises a plurality of first microbeads having a first index of refraction and a plurality of second microbeads having a second index of refraction, the first index of refraction being in a range of nTÂ±0.05, inclusive, and the second index of refraction being different than the first index of refraction.