Patent US5289311A successfully refreshed from Google Patents.
US5289311A
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Optical element such as a rear projection screen for an image display device and method of producing same
Assignee: RCA Licensing Corp
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Filing: 1992-08-14
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Granted: 1994-02-22
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Expires: 2012-08-14
Abstract
Abstract An optical element such as a rear projection screen for an image display device comprises at least two substantially rigid sheet members each having a first major surface and a second major surface providing a plane of incidence and a plane of emergence, respectively, through which light is transmitted sequentially. A first sheet member comprises a Fresnel lens, and a second sheet member comprises a lenticular lens array on each of the major surfaces thereof. The plane of emergence on the second major surface of the first sheet member includes the Fresnel lens formed of a radiation curable material. A method of making the Fresnel lens is described.
Inventors
- 👤 Sandra K. McClelland
- 👤 Randall E. McCoy
- 👤 Dominic S. Rosati, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:06
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/74; G; G02; G02B; G02B3/00; G02B3/0006; G02B3/0012; G02B3/0031; G02B3/0037; G02B3/0062; G02B3/0068; G02B3/02; G02B3/08; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; G03B21/62; G03B21/625
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
84 words
In a rear projection screen for an image display device comprising at least two substantially rigid sheet members each having a first major surface and a second major surface through which light is transmitted sequentially, wherein a first sheet member comprises a Fresnel lens and a second sheet member comprises a lenticular lens array on each of said major surfaces thereof, the improvement wherein said second major surface of said first sheet member includes said Fresnel lens being formed of a radiation curable material.
Claim 2
Dependent Claim
84 words
In a rear projection screen for an image display device comprising at least two substantially rigid sheet members each having a first major surface and a second major surface through which light is transmitted sequentially, wherein a first sheet member comprises a Fresnel lens and a second sheet member comprises a lenticular lens array on each of said major surfaces thereof, the improvement wherein said second major surface of said first sheet member includes said Fresnel lens being formed of a radiation curable material.
Claim 3
Dependent Claim
44 words
The image display device as described in claim 1, wherein said first major surface of said first sheet having a geometry of a lenticular lens array, the array direction being orthogonal to the array direction of the lenticular lens arrays on said second sheet.
References Cited (Backward Citations)
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US4420527A
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US4656522A
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US5066099A
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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) | 1997-02-21 | 1997-08-23 | 1998-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-21 | 2001-08-23 | 2002-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-21 | 2005-08-23 | 2006-02-22 | $7700.00 | Window Closed / Lapsed |