US6002500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Holographic screen including convex protrusions
Assignee: Samsung Electronics Co Ltd
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Filing: 1997-05-13
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Granted: 1999-12-14
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Expires: 2017-05-13
Abstract
Abstract A holographic screen of a rear projection type for use in a projector for transmitting projection light received from a rear end of the projector onto a viewing surface. The holographic screen includes a holographic sheet including a viewing surface for forming the received projection light into an image viewing, a plurality of diffusion protrusions disposed on the viewing surface in predetermined intervals along horizontal and vertical directions of the viewing surface for diffusing incident projection light, and a plurality of scattering protrusions formed over the entire viewing surface for scattering the received projection light, and a plurality of light absorbers formed between the plurality of protrusions, for absorbing ambient light incident to the viewing surface. Thus, an image with improved contrast is displayed on a viewing surface of the holographic screen.
Inventors
- 👤 Yong-ki Kim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:07
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; G02; G02B; G02B5/00; G02B5/32; G03B21/62; G03B21/625
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
143 words
A holographic screen for use in a projector for transmitting projection light received from a rear end of the projector onto a viewing surface, said holographic screen comprising: a sheet comprising a viewing surface for forming projection light into an image for viewing, a plurality of diffusion protrusions disposed on the viewing surface in predetermined intervals along horizontal and vertical directions of the viewing surface for diffusing incident projection light, a plurality of scattering protrusions formed over the viewing surface, including the plurality of diffusion protrusions disposed thereon, for scattering the received projection light, and a plurality of light absorbers disposed on the viewing surface, for absorbing ambient light incident to said viewing surface, wherein all of said plurality of light absorbers are disposed discretely from each other and each of said plurality of light absorbers is located between four neighboring diffusion protrusions.
Claim 2
Dependent Claim
143 words
A holographic screen for use in a projector for transmitting projection light received from a rear end of the projector onto a viewing surface, said holographic screen comprising: a sheet comprising a viewing surface for forming projection light into an image for viewing, a plurality of diffusion protrusions disposed on the viewing surface in predetermined intervals along horizontal and vertical directions of the viewing surface for diffusing incident projection light, a plurality of scattering protrusions formed over the viewing surface, including the plurality of diffusion protrusions disposed thereon, for scattering the received projection light, and a plurality of light absorbers disposed on the viewing surface, for absorbing ambient light incident to said viewing surface, wherein all of said plurality of light absorbers are disposed discretely from each other and each of said plurality of light absorbers is located between four neighboring diffusion protrusions.
Claim 3
Dependent Claim
27 words
The holographic screen according to claim 1, wherein said plurality of light absorbers are disposed in predetermined intervals along horizontal and vertical directions of said viewing surface.
Claim 4
Dependent Claim
24 words
The holographic screen according to claim 1, wherein each of said plurality of light absorbers is located centrally between said four neighboring diffusion protrusions.
Claim 5
Dependent Claim
17 words
The holographic screen according to claim 1, wherein said respective light absorbers are substantially circular in shape.
Claim 6
Dependent Claim
20 words
The holographic screen according to claim 1, wherein said plurality of light absorbers are coated materials with a predetermined color.
Claim 7
Dependent Claim
33 words
The holographic screen according to claim 1, further comprising a Fresnel lens sheet which uniformly converges the projection light from the rear end of the projector onto the incident surface of said sheet.
Claim 8
Dependent Claim
144 words
A rear projector comprising a holographic screen for use for transmitting projection light received from a rear end of the projector onto a viewing surface, said holographic screen comprising: a sheet comprising a viewing surface for forming projection light into an image for viewing, a plurality of diffusion protrusions disposed on the viewing surface in predetermined intervals along horizontal and vertical directions of the viewing surface for diffusing incident projection light, a plurality of scattering protrusions formed over the viewing surface, including the plurality of diffusion protrusions disposed thereon, for scattering the received projection light, and a plurality of light absorbers disposed on the viewing surface, for absorbing ambient light incident to said viewing surface, wherein all of said plurality of light absorbers are disposed discretely from each other and each of said plurality of light absorbers is located between four neighboring diffusion protrusions.
Claim 9
Dependent Claim
144 words
A rear projector comprising a holographic screen for use for transmitting projection light received from a rear end of the projector onto a viewing surface, said holographic screen comprising: a sheet comprising a viewing surface for forming projection light into an image for viewing, a plurality of diffusion protrusions disposed on the viewing surface in predetermined intervals along horizontal and vertical directions of the viewing surface for diffusing incident projection light, a plurality of scattering protrusions formed over the viewing surface, including the plurality of diffusion protrusions disposed thereon, for scattering the received projection light, and a plurality of light absorbers disposed on the viewing surface, for absorbing ambient light incident to said viewing surface, wherein all of said plurality of light absorbers are disposed discretely from each other and each of said plurality of light absorbers is located between four neighboring diffusion protrusions.
Claim 10
Dependent Claim
123 words
A holographic screen for transmitting light onto a viewing surface comprising: a sheet comprising a viewing surface for forming light into a viewable image, a plurality of diffusion protrusions disposed on the viewing surface in predetermined intervals along horizontal and vertical directions of the viewing surface for diffusing incident light, and a plurality of scattering protrusions formed over the viewing surface, including the plurality of diffusion protrusions disposed thereon, for scattering the received light, and a plurality of light absorbers disposed on the viewing surface, for absorbing ambient light incident to said viewing surface, wherein all of said plurality of light absorbers are disposed discretely from each other and each of said plurality of light absorbers is located between four neighboring diffusion protrusions.
Claim 11
Dependent Claim
123 words
A holographic screen for transmitting light onto a viewing surface comprising: a sheet comprising a viewing surface for forming light into a viewable image, a plurality of diffusion protrusions disposed on the viewing surface in predetermined intervals along horizontal and vertical directions of the viewing surface for diffusing incident light, and a plurality of scattering protrusions formed over the viewing surface, including the plurality of diffusion protrusions disposed thereon, for scattering the received light, and a plurality of light absorbers disposed on the viewing surface, for absorbing ambient light incident to said viewing surface, wherein all of said plurality of light absorbers are disposed discretely from each other and each of said plurality of light absorbers is located between four neighboring diffusion protrusions.
Claim 12
Dependent Claim
27 words
The holographic screen according to claim 8, wherein said plurality of light absorbers are disposed in predetermined intervals along horizontal and vertical directions of said viewing surface.
Claim 13
Dependent Claim
24 words
The holographic screen according to claim 8, wherein each of said plurality of light absorbers is located centrally between said four neighboring diffusion protrusions.
Claim 14
Dependent Claim
17 words
The holographic screen according to claim 8, wherein said respective light absorbers are substantially circular in shape.
Claim 15
Dependent Claim
20 words
The holographic screen according to claim 8, wherein said plurality of light absorbers are coated materials with a predetermined color.
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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) | 2002-12-13 | 2003-06-14 | 2003-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-12-13 | 2007-06-14 | 2007-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-12-13 | 2011-06-14 | 2011-12-14 | $7700.00 | Window Closed / Lapsed |