HIGH CONTRAST PROJECTION SCREEN
First Claim
Patent Images
1. A projection system comprising:
- a projector anda screen with a reflecting surface comprising a hologram having a plurality of spectrums of reference light and object light for recording,wherein said spectrums of said reference light and object light are substantially matching those of incident lights project from the projector to said screen and a direction of the reference light to create the hologram is substantially toward the projector and the direction of the object light is substantially toward the viewer.
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Abstract
An image display system includes a reflecting screen that has a reflecting surface. The reflecting surface includes hologram which reflects narrow bands of spectrum of incident lights toward desired direction. A projection display system includes a reflecting mirror(s) with hologram so that the image can be projected nearly vertical or short distance. This invention can be used as a head-up-display with improved brightness and eliminating ghost noise.
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Citations
27 Claims
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1. A projection system comprising:
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a projector and a screen with a reflecting surface comprising a hologram having a plurality of spectrums of reference light and object light for recording, wherein said spectrums of said reference light and object light are substantially matching those of incident lights project from the projector to said screen and a direction of the reference light to create the hologram is substantially toward the projector and the direction of the object light is substantially toward the viewer. - View Dependent Claims (2, 3, 5)
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4. A projection screen comprising:
a hologram exposed with a reference beam and an object beam reflected by a free shaped mirror or passed through free shaped lens wherein the curvature of the free shaped mirror and lens is to reflect a light projected from an image projector to a projection screen without distortion and color aberration.
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6. A projection system comprising:
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a projector and a screen covered with Fresnel lens or layer(s) for reflecting a plurality of spectrums wherein said spectrums are substantially matching incident lights projected from said projector onto the surface of said screen. - View Dependent Claims (7, 8, 9)
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10. A method of fabricating a hologram comprising:
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coating a photo-sensitive film on a projection screen; projecting at least two coherent laser beams from a laser source; directing the laser beams by Galvano-mirrors to project to a preprogramed direction to a segmented area of said photo-sensitive film and to expose the segmented area with said laser beams and to scan said Galvano-mirrors to expose the entire area of said photo-sensitive film
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11. A method of fabricating a hologram comprising:
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coating a photo-sensitive film on a projection screen; projecting at least two coherent laser beams from a laser source; directing the laser beams by Galvano-mirrors to project to a preprogramed direction to a segmented area of said photo-sensitive film and to expose the segmented area with said laser beams and to scan said photo-sensitive film to expose the entire area of said photo-sensitive film - View Dependent Claims (12, 13, 14, 21)
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11-1. A head-up-display system comprising:
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a mobile phone having a display and a screen with a reflecting surface comprising hologram having a plurality of spectrums of reference light and object light for recording, wherein said spectrums of said reference light and object light are matching those of incident lights from said display of said mobile phone to said screen and the direction of recording lights to create hologram is substantially toward viewers for object beam and substantially from a point where the mobile phone is placed for reference beam and a backing film of said reflecting surface is transparent.
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15. A head-up-display system comprising:
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a mobile phone having a display and a screen with layer(s) reflecting a plurality of spectrums wherein said spectrums are matching those of incident lights from said display of the mobile phone - View Dependent Claims (16, 17, 18, 19, 22)
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20. A head-up-display system comprising:
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a mobile phone having a display and a screen with a layer(s) for partially reflecting an incoming light and partially passing the incoming light; and a transparent backing sheet for a viewer to see through said screen and the transparent backing sheet has layers from an UV shielding layer, photo-chromic layer and electro-chromic layer covering over the transparent backing sheet. - View Dependent Claims (23, 24, 25, 26, 27)
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Specification