Polarization preserving front projection screen material
First Claim
1. Roll stock for a projection screen, comprising:
- a roll of projection screen material having a first and second side;
a plurality of reflective microstructures distributed over the first side of the projection screen material, the reflective microstructures distributed according to a predetermined scatter profile operable to reflect incident light from a predetermined incident angle range to within a diffusion locus, wherein light reflected from the predetermined incident angle range to within the diffusion locus substantially undergoes no more than one reflection from the first side of the projection screen material, wherein the plurality of reflective microstructures distributed over the first side of the projection screen material comprises a spatially homogenous statistical distribution of reflective microstructures.
11 Assignments
0 Petitions
Accused Products
Abstract
Polarization preserving front projection screens and diffusers provide optimum polarization preservation for stereoscopic 3D viewing, as well as improved light control for enhanced brightness, uniformity, and contrast for both 2D and 3D systems. Generally, the disclosed screens direct light from a projector toward viewers within a diffusion locus, while maintaining optimum gain characteristics. More specifically, light incident on a region of the front projection screen from a predetermined projection direction is reflected by an engineered surface to a predetermined diffusion locus after undergoing substantially single reflections. The engineered surface, comprised of generating kernels, is used to optimally diffuse illumination light into a range of viewing angles, within the diffusion locus, with suitable gain profile, while optimally preserving polarization for 3D applications. Such a screen, when combined with matched polarization analyzing eyewear, provides extremely low cross-talk from any observation point.
33 Citations
22 Claims
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1. Roll stock for a projection screen, comprising:
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a roll of projection screen material having a first and second side; a plurality of reflective microstructures distributed over the first side of the projection screen material, the reflective microstructures distributed according to a predetermined scatter profile operable to reflect incident light from a predetermined incident angle range to within a diffusion locus, wherein light reflected from the predetermined incident angle range to within the diffusion locus substantially undergoes no more than one reflection from the first side of the projection screen material, wherein the plurality of reflective microstructures distributed over the first side of the projection screen material comprises a spatially homogenous statistical distribution of reflective microstructures. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for making a projection screen from roll stock, the method comprising:
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providing a roll of projection screen material having a first and second side; and distributing a plurality of reflective microstructures over the first side of the projection screen material according to a predetermined scatter profile operable to reflect incident light from a predetermined incident angle range to within a diffusion locus, wherein light reflected from the predetermined incident angle range to within the diffusion locus substantially undergoes no more than one reflection from the first side of the projection screen material, wherein the substrate and plurality of reflective microstructures comprise a roll stock of projection screen forming material, wherein the plurality of reflective microstructures distributed over the first side of the projection screen material comprises a spatially homogenous statistical distribution of reflective microstructures. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. Roll stock for a projection screen, comprising:
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a roll of projection screen material having a first and second side; and a plurality of reflective microstructures distributed over the first side of the roll stock, the reflective microstructures comprising at least one generating kernel, wherein the at least one generating kernel has a topographical shape operable to substantially eliminate secondary reflections of light within a predetermined incident angle range, wherein the plurality of reflective microstructures distributed over the first side of the projection screen material comprises a spatially homogenous statistical distribution of reflective microstructures. - View Dependent Claims (22)
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Specification