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 comprising:
- 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.
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.
A projection system comprising:
- 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.
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 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
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 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
A head-up-display system comprising:
- 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.
A head-up-display system comprising:
- 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
A head-up-display system comprising:
- 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.
Dependencies are inferred from the claim text.