Polarization preserving front projection screen
First Claim
1. A projection screen, comprising:
- a contoured reflective surface having a predetermined scatter profile, the predetermined scatter profile being operable to reflect incident light from a predetermined incident angle range to within a diffusion locus,wherein the light reflected from the predetermined incident angle range to within the diffusion locus substantially undergoes no more than one reflection from the contoured reflective surface, and wherein the diffusion locus is defined by a region in which reflections within the diffusion locus substantially undergo no more than one reflection on the contoured reflective surface, and wherein light reflected outside of the diffusion locus undergoes one or more reflections on the contoured reflective surface.
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.
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Citations
83 Claims
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1. A projection screen, comprising:
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a contoured reflective surface having a predetermined scatter profile, the predetermined scatter profile being operable to reflect incident light from a predetermined incident angle range to within a diffusion locus, wherein the light reflected from the predetermined incident angle range to within the diffusion locus substantially undergoes no more than one reflection from the contoured reflective surface, and wherein the diffusion locus is defined by a region in which reflections within the diffusion locus substantially undergo no more than one reflection on the contoured reflective surface, and wherein light reflected outside of the diffusion locus undergoes one or more reflections on the contoured reflective surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method for providing a projection screen, the method comprising:
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providing a contoured reflective surface having a predetermined scatter profile, the predetermined scatter profile being operable to reflect incident light from a predetermined incident angle range to within a diffusion locus; and distributing substantially all light undergoing more than one reflection outside of the diffusion locus, wherein the light reflected from the predetermined incident angle range to within the diffusion locus substantially undergoes no more than one reflection from the contoured reflective surface. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A projection screen, comprising:
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a contoured reflective surface having a predetermined scatter profile, the predetermined scatter profile being operable to reflect incident light from a predetermined incident angle range to within a diffusion locus, wherein the light reflected from the predetermined incident angle range to within the diffusion locus substantially undergoes no more than one reflection from the contoured reflective surface, and wherein the contoured reflective surface is operable to substantially eliminate light undergoing multiple reflections from being distributed within the diffusion locus. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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48. A projection screen, comprising:
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a contoured reflective surface having a predetermined scatter profile, the predetermined scatter profile being operable to reflect incident light from a predetermined incident angle range to within a diffusion locus, wherein the light reflected from the predetermined incident angle range to within the diffusion locus substantially undergoes no more than one reflection from the contoured reflective surface, and wherein substantially all light undergoing more than one reflection is distributed outside of the diffusion locus. - View Dependent Claims (49, 50, 51, 52, 53, 54, 55)
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56. A method for providing a projection screen, the method comprising:
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providing a contoured reflective surface having a predetermined scatter profile, the predetermined scatter profile being operable to reflect incident light from a predetermined incident angle range to within a diffusion locus; and defining the diffusion locus by a region in which reflections within the diffusion locus substantially undergo no more than one reflection on the contoured reflective surface, and wherein light reflected outside of the diffusion locus undergoes one or more reflections on the contoured reflective surface, wherein the light reflected from the predetermined incident angle range to within the diffusion locus substantially undergoes no more than one reflection from the contoured reflective surface. - View Dependent Claims (57, 58, 59, 60, 61, 62, 63, 64)
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65. A method for providing a projection screen, the method comprising:
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providing a contoured reflective surface having a predetermined scatter profile, the predetermined scatter profile being operable to reflect incident light from a predetermined incident angle range to within a diffusion locus; and eliminating substantially all light undergoing multiple reflections from being distributed within the diffusion locus, wherein the light reflected from the predetermined incident angle range to within the diffusion locus substantially undergoes no more than one reflection from the contoured reflective surface. - View Dependent Claims (66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83)
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Specification