Micro-lens array based light transmitting screen with high resolution and low imaging artifacts
First Claim
1. A light-transmission screen, comprising:
- a lens array comprising a plurality of lenses for projecting light, wherein at least one hundred lenses are assigned to each pixel of an image so as to obtain a desired screen resolution.
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Accused Products
Abstract
A light-transmission screen includes a diffusing element formed from a micro-lens array for projecting images in a viewing space. The screen generates images of improved quality by varying structural features of one or more lenses in the array so that light is directed in different directions and/or with different optical properties compared with other lenses in the array. The structural features which are varied include any one or more of size, shape, curvature, or spacing of the lenses in the array. As a result of these variations, the screen achieves wider viewing angles, improved screen resolution and gain, and a greater ability to reduce or eliminate aliasing or other artifacts in the generated images compared with conventional screens. A method for making a light-transmission screen of this type preferably forms the micro-lens array using a stamping operation based on a master. By taking this approach, the screen is manufactured with fewer process steps and at less cost compared with conventional methods.
107 Citations
69 Claims
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1. A light-transmission screen, comprising:
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a lens array comprising a plurality of lenses for projecting light, wherein at least one hundred lenses are assigned to each pixel of an image so as to obtain a desired screen resolution. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A light-transmission screen, comprising:
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a lens array comprising a plurality of lenses for projecting light, wherein at least two lenses are assigned to each pixel of an image so as to obtain a desired screen resolution; and
wherein spacing between two adjacent lenses is less than approximately 105% of a diameter of one of the two adjacent lenses.
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13. A light-transmission screen for displaying an image, comprising:
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a lens array comprising a plurality of lenses for projecting light;
a mask layer, comprising a plurality of apertures, optically coupled to the lens array and positioned on a viewing side of the lens array, wherein each aperture is registered to a corresponding lens in the lens array and is adapted to pass light from its corresponding lens;
wherein each pixel of the image is generated by light from at least one hundred lens/aperture combinations. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A light-transmission screen for displaying an image, comprising:
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a lens array comprising a plurality of lenses for projecting light;
a mask layer, comprising a plurality of apertures, optically coupled to the lens array and positioned on a viewing side of the lens array, wherein each aperture is registered to a corresponding lens in the lens array and is adapted to pass light from its corresponding lens;
wherein each pixel of the image is generated by light from at least two lens/aperture combinations; and
wherein spacing between two adjacent lenses is less than approximately 105% of a diameter of one of the two adjacent lenses.
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24. A light-transmission screen, comprising:
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a lens array comprising a plurality of lenses for projecting light, wherein at least two lenses are assigned to each pixel of an image so as to oversample the image by at least ten times the Nyquist rate. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A light-transmission screen for displaying an image, comprising:
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a lens array comprising a plurality of lenses for projecting light; and
a mask layer, comprising a plurality of apertures, optically coupled to the lens array and positioned on a viewing side of the lens array, wherein each aperture is registered to a corresponding lens in the lens array and is adapted to pass light from its corresponding lens;
wherein each pixel of the image is generated by light from at least two lens/aperture combinations so as to oversample the image by at least ten times the Nyquist rate. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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47. A light-transmission screen, comprising:
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a lens array comprising a plurality of lenses for projecting light, wherein more than three lenses are assigned to each pixel of an image so as to obtain a desired screen resolution. - View Dependent Claims (48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58)
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59. A light-transmission screen for displaying an image, comprising:
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a lens array comprising a plurality of lenses for projecting light; and
a mask layer, comprising a plurality of apertures, optically coupled to the lens array and positioned on a viewing side of the lens array, wherein each aperture is registered to a corresponding lens in the lens array and is adapted to pass light from its corresponding lens;
wherein each pixel of the image is generated by light from more than three lens/aperture combinations. - View Dependent Claims (60, 61, 62, 63, 64, 65, 66, 67, 68, 69)
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Specification