US6414727B1
Expired / Lapsed
US
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Video projection holographic screen, system and method
Assignee: Christie Digital Systems USA Inc
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Filing: 1998-01-28
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Granted: 2002-07-02
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Expires: 2018-01-28
Abstract
Abstract A laser projection video system and a holographic screen. The system includes a pulsed laser video image system with a holographic screen to receive the full color video image, which screen has a holographic layer (layer 1 ) to reflect back the full color video image to the viewer and to transmit through the screen the ambient light to provide high video picture contrast.
Inventors
- 👤 Stephen A. Benton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:33
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/02; G02B5/0205; G02B5/0252; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; H; H04; H04N; H04N5/00; H04N5/76; H04N5/89; H04N9/00; H04N9/12; H04N9/31; H04N9/3129
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
118 words
A laser projection video system, which system comprises: a) a pulsed laser video image projection means powered as a light source with coherent pulsed laser R,G, B light to display a full color video image, corresponding to electrical signals representing the images on a projection screen means; and b) a projection screen means with a projection surface to receive the full color video image on the projection screen surface for viewing; the projection screen having a first holographic diffusely-reflecting layer thereon to reflect back the full color video image substantially only in a selected viewing direction and to transmit substantially ambient light through the projection screen means to provide for high video picture contrast on the projection screen.
Claim 2
Dependent Claim
118 words
A laser projection video system, which system comprises: a) a pulsed laser video image projection means powered as a light source with coherent pulsed laser R,G, B light to display a full color video image, corresponding to electrical signals representing the images on a projection screen means; and b) a projection screen means with a projection surface to receive the full color video image on the projection screen surface for viewing; the projection screen having a first holographic diffusely-reflecting layer thereon to reflect back the full color video image substantially only in a selected viewing direction and to transmit substantially ambient light through the projection screen means to provide for high video picture contrast on the projection screen.
Claim 3
Dependent Claim
28 words
The system of claim 1 wherein the holographic layer provides predetermined horizontal and vertical distribution zones to shape the full color video image into defined narrow viewing areas.
Claim 4
Dependent Claim
29 words
The system of claim 1 wherein the holographic layer includes a second layer of a diffracting holographic pattern to direct the reflected video image to separate selected viewing zones.
Claim 5
Dependent Claim
19 words
The system of claim 3 wherein the viewing zones are right and left viewing zones relative to the viewer.
Claim 6
Dependent Claim
16 words
The system of claim 3 wherein the full color video image is a stereoscopic video image.
Claim 7
Dependent Claim
22 words
The system of claim 3 wherein the screen comprises a second selected holographic layer on the back surface of the second layer.
Claim 8
Dependent Claim
15 words
The system of claim 6 wherein the second layer comprises a transparent plastic film material.
Claim 9
Dependent Claim
28 words
The system of claim 1 wherein the projection screen means includes a holographic reflecting layer of less than about 0.0002 inches on a transparent plastic film screen surface.
Claim 10
Dependent Claim
57 words
The system of claim 1 wherein the projection screen means includes a transparent plastic projection screen surface with a back surface and having a first holographic reflecting layer on the back surface, and a holographic diffracting layer in front of the first holographic layer to provide selected viewing zones and a three dimensional image to a viewer.
Claim 11
Dependent Claim
51 words
The system of claim 9 wherein the pulsed layer video image projection means includes a first and second projection means each powered by R,G and B pulsed lasers with video input signals from first and second spatially displaced cameras to project different first and second images onto the projection screen means.
Claim 12
Dependent Claim
95 words
A projection screen adapted to receive a projected image of R,G and B wave lengths thereon for a viewer, which projection screen comprises a transparent plastic material having a front projection surface for viewing a projected image, and having a thin film first diffusely-reflecting holographic layer on the back surface thereof to reflect back to the viewer the projected image of the R,G and B wave lengths in a selected direct viewing zone and to transmit ambient light through the transparent plastic material to provide for a high contrast image on the front projection surface.
Claim 13
Dependent Claim
95 words
A projection screen adapted to receive a projected image of R,G and B wave lengths thereon for a viewer, which projection screen comprises a transparent plastic material having a front projection surface for viewing a projected image, and having a thin film first diffusely-reflecting holographic layer on the back surface thereof to reflect back to the viewer the projected image of the R,G and B wave lengths in a selected direct viewing zone and to transmit ambient light through the transparent plastic material to provide for a high contrast image on the front projection surface.
Claim 14
Dependent Claim
31 words
The screen of claim 11 which includes a second thin film diffracting holographic layer in front of the first layer to diffract a portion of the image to selected viewing zones.
Claim 15
Dependent Claim
32 words
The screen of claim 12 which comprises a polyester or polycarbonate transparent plastic material and wherein the first and second holographic layer are contact printed layers of about 0.0002 inches or less.
Claim 16
Independent Claim
104 words
A method of providing a high contrast laser video image for a viewer as a projection screen, which method comprises: a) modulating red (R), green (G), and blue (B) light to form a full color laser video image corresponding to electrical signals representing the images; and b) projecting the full color laser video image onto a projection screen compound of a transparent material to transmit the passage of ambient light and having a thin film holographic layer on the projection screen to reflect back to the viewer only the full color laser video image, thereby providing a high contrast full color image for viewing.
Claim 17
Independent Claim
104 words
A method of providing a high contrast laser video image for a viewer as a projection screen, which method comprises: a) modulating red (R), green (G), and blue (B) light to form a full color laser video image corresponding to electrical signals representing the images; and b) projecting the full color laser video image onto a projection screen compound of a transparent material to transmit the passage of ambient light and having a thin film holographic layer on the projection screen to reflect back to the viewer only the full color laser video image, thereby providing a high contrast full color image for viewing.
Claim 18
Dependent Claim
39 words
The screen of claim 11 wherein the image is generated by a R,G and B laser light source and the first holographic layer reflects back to the viewer only those R,G, and B wave lengths of the light source.
Claim 19
Dependent Claim
22 words
The screen of claim 11 wherein the first holographic layer comprises a photo polymerizable material with one or more holographic patterns thereon.
Claim 20
Dependent Claim
20 words
The screen of claim 12 wherein the second holographic layer diffracts the image to selected left and right viewing zones.
Claim 21
Dependent Claim
26 words
The screen of claim 11 wherein the first holographic layer comprises a plurality of selected holographic patterns to reflect back monochromatic R,G and B wave lengths.
Claim 22
Dependent Claim
34 words
The screen of claim 12 wherein the color images comprises a stereoscopic laser image and the diffracting holographic layer provides left and right viewing zones to produce a three dimension image to the viewer.
Claim 23
Dependent Claim
34 words
In combination, a light source to provide a monochromatic or semi-monochromatic R,G and B full color image onto a projection screen, and wherein the projection screen comprises the projection screen of claim 11 .
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-07-01 | 2005-12-31 | 2006-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-07-01 | 2009-12-31 | 2010-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-07-01 | 2013-12-31 | 2014-07-02 | $7700.00 | Window Closed / Lapsed |