High contrast projection screen
AssigneeFusao Ishii
InventorFusao Ishii
Life of this patent
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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.
Claims28
A projection system for providing a holographic view to a viewer comprising:
- a projector and
- a screen with a reflecting surface comprising a hologram recorded from a plurality of spectrums generated from an interference of a reference light and an object light,
- wherein said spectrums of said reference light and object light are substantially matching spectrums of incident lights projected from the projector to said screen;
- and
- the hologram on the screen receives the reference light substantially along a direction toward the projector and the screen receives the object light along a direction of toward the viewer.
A projection screen comprising:
- a hologram exposed with a reference beam and an object beam reflected by a free shaped mirror wherein a curvature of the free shaped mirror reflects a light projected from an image projector to a projection screen with a reduced distortion and color aberration.
A projection system comprising:
- a projector and
- a screen covered with Fresnel lens for reflecting a plurality of spectrums wherein said spectrums substantially match incident lights projected from said projector onto said screen.
A method of fabricating a hologram comprising:
- 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 preprogrammed direction projecting the laser beams to a segmented area of said photo-sensitive film and to expose the segmented area with said laser beams and continuously scan said Galvano-mirrors to expose the entire area of said photo-sensitive film.
A method of fabricating a hologram comprising:
- 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 preprogrammed directions to a segmented area of said photo-sensitive film and to continuously scan said photo-sensitive film to expose the entire area of said photo-sensitive film.
A head-up-display system comprising:
- a mobile phone having a display and
- a screen with a reflecting surface comprising a hologram recorded from a plurality of spectrums of reference light and object light,
- wherein said spectrums of said reference light and object light are substantially matching spectrums of incident lights projected from the projector to said screen;
- and
- the hologram on the screen is recorded by an object beam projected along a direction substantially toward a viewer using the mobile phone and substantially from a point where the mobile phone is placed for reference beam and a backing film of said reflecting surface is transparent.
A head-up-display system comprising:
- a mobile phone having a display and a screen with a holographic layer for reflecting a plurality of spectrums wherein said spectrums are matched with the spectrums of incident lights from said display of the mobile phone.
A head-up-display system comprising:
- a mobile phone having a display and
- a screen includes a partially transparent layer 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 wherein the transparent backing sheet comprises layers selected from an UV shielding layer, photo-chromic layer and electro-chromic layer covering over the transparent backing sheet.
Dependencies are inferred from the claim text.