Patent US5626410A successfully refreshed from Google Patents.
US5626410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rear projection screen with uniform brightness for tiling the images from an array of projectors
Assignee: PALOMAR DISPLAY PRODUCTS Inc A Corp OF DELAWARE
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Filing: 1995-09-20
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Granted: 1997-05-06
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Expires: 2015-09-20
Abstract
Abstract A novel rear projection screen that displays images with substantially uniform brightness over a wider field-of-view than prior rear projection screens, comprising a first diffusing assembly for diffusing the image and a second diffusing assembly for further diffusing the image from the first diffuser. In the preferred embodiment, the first and second diffusing assemblies comprise an input diffusing screen and a fiber optic array, respectively, with an output diffusing screen used at the output end of the fiber optic array. A preferred flat panel tiled display system that incorporates the present invention includes a plurality of collimated light sources, with respective liquid crystal display assemblies that impart images onto the collimated light beams. An imager images the image-bearing light beams onto the rear projection screen described above so that they are displayed in a tiled arrangement.
Inventors
- 👤 James M. Chambers
- 👤 Steven E. Shields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:05
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/005; G03B21/10; G03B21/54; G03B21/56; G03B21/60; G03B21/62; H; H04; H04N; H04N5/00; H04N5/72
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
51 words
A projection screen for displaying an image from an image source, comprising: a first diffusing assembly comprising an input diffusing screen for diffusing said image, and a second diffusing assembly comprising a fiber optic array positioned to receive an image from said input diffusing screen and to further diffuse said image.
Claim 2
Dependent Claim
51 words
A projection screen for displaying an image from an image source, comprising: a first diffusing assembly comprising an input diffusing screen for diffusing said image, and a second diffusing assembly comprising a fiber optic array positioned to receive an image from said input diffusing screen and to further diffuse said image.
Claim 3
Dependent Claim
29 words
The projections screen of claim 1, further comprising an output diffusing screen positioned at an output end of said fiber optic array, for diffusing said image a third time.
Claim 4
Dependent Claim
54 words
A projection screen for displaying an image from an image source, comprising: an input diffusing screen having input and output sides, for diffusing said image, and a fiber optic array having an input end that is attached to the output side of said input diffusing screen, for receiving and further diffusing said diffused image.
Claim 5
Dependent Claim
54 words
A projection screen for displaying an image from an image source, comprising: an input diffusing screen having input and output sides, for diffusing said image, and a fiber optic array having an input end that is attached to the output side of said input diffusing screen, for receiving and further diffusing said diffused image.
Claim 6
Dependent Claim
36 words
The projection screen of claim 3, further comprising an output diffusing screen attached to said output end of said fiber optic array, for diffusing said image a third time after it exits said fiber optic array.
Claim 7
Dependent Claim
20 words
The projection screen of claim 4, further comprising an anti-reflection coating on a viewing side of said output diffusing screen.
Claim 8
Dependent Claim
23 words
The projection screen of claim 3, wherein each of said input and output diffusing screens comprises a plastic matrix embedded with diffusion particles.
Claim 9
Dependent Claim
26 words
The projection screen of claim 3, wherein said fiber optic array comprises an array of optical fibers having a numerical aperture not greater than approximately 0.50.
Claim 10
Dependent Claim
69 words
An optical projection system for displaying an image, comprising: a first diffusing assembly, a plurality of image sources for generating respective portions of said image and directing said portions to said first diffusing assembly, so that said image portions are adjacent to each other at said first diffusing assembly, and are diffused by said first diffusing assembly, and a second diffusing assembly for further diffusing said diffused image portions.
Claim 11
Dependent Claim
69 words
An optical projection system for displaying an image, comprising: a first diffusing assembly, a plurality of image sources for generating respective portions of said image and directing said portions to said first diffusing assembly, so that said image portions are adjacent to each other at said first diffusing assembly, and are diffused by said first diffusing assembly, and a second diffusing assembly for further diffusing said diffused image portions.
Claim 12
Dependent Claim
19 words
The projection screen of claim 8, wherein said first and second diffusing assemblies comprise first and second diffusing screens.
Claim 13
Dependent Claim
48 words
The projection screen of claim 8, wherein said first and second diffusing assemblies respectively comprise: an input diffusing screen for diffusing said image portions, and a fiber optic array attached to an output side of said input diffusing screen for receiving and further diffusing said diffused image portions.
Claim 14
Dependent Claim
30 words
The projection screen of claim 10, further comprising an output diffusing screen positioned at an output end of said fiber optic array, for diffusing said image portions a third time.
Claim 15
Dependent Claim
20 words
The projection system of claim 11, further comprising an anti-reflection coating on a viewing side of said output diffusing screen.
Claim 16
Dependent Claim
23 words
The projection system of claim 11, wherein each of said first and second diffusing screens comprises a plastic matrix with embedded diffusion particles.
Claim 17
Dependent Claim
22 words
The projection system of claim 9, wherein said fiber optic array comprises optical fibers having a numerical aperture not greater approximately 0.50.
Claim 18
Dependent Claim
53 words
The projection system of claim 8, wherein said image sources comprise: a plurality of collimated light sources for generating a plurality of collimated light beams, respective liquid crystal display assemblies for imparting said image portions onto said collimated light beams, and respective imagers for imaging said image portions onto said first diffusing assembly.
Claim 19
Dependent Claim
12 words
The projection system of claim 15, wherein said imagers comprise respective lenses.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-05-05 | 2000-11-04 | 2001-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-05-05 | 2004-11-04 | 2005-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-05-05 | 2008-11-04 | 2009-05-06 | $7700.00 | Window Closed / Lapsed |