Patent US4083626A successfully refreshed from Google Patents.
US4083626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rear projection screens
Assignee: Fujifilm Holdings Corp
•
Filing: 1976-04-02
•
Granted: 1978-04-11
•
Expires: 1996-04-02
Abstract
Abstract Rear projection screens of superior mechanical and optical properties are described which comprise, in all instances, at least one light diffusion layer and at least one transparent support, an intermediate layer being provided between the light diffusion layer and the transparent support, which intermediate layer is formed from a photocurable composition.
Inventors
- 👤 Junji Miyahara
- 👤 Hisatoyo Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:20
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; G03B21/602; B32B27/34; B32B27/36; G03B21/62; G03B21/625; B32B2307/00; B32B2307/70; B32B2307/704; B32B2367/00; B32B2377/00; B32B2391/00
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
29 words
A rear projection screen comprising at least one light diffusion layer and at least one transparent support which are bonded via an intermediate layer formed from a photocurable composition.
Claim 2
Dependent Claim
29 words
A rear projection screen comprising at least one light diffusion layer and at least one transparent support which are bonded via an intermediate layer formed from a photocurable composition.
Claim 3
Dependent Claim
31 words
A rear projection screen as claimed in claim 1, wherein said light diffusion layer comprises components selected from the group of: wax, a crystalline polymer, and wax and a crystalline polymer.
Claim 4
Dependent Claim
15 words
A rear projection screen as claimed in claim 2, wherein said photocurable composition is liquid.
Claim 5
Dependent Claim
43 words
A rear projection screen as claimed in claim 3, wherein said liquid photocurable composition contains components selected from the group of: A, B, and A and B where A is one or more photopolymerizable monomers, and B is one or more photopolymerizable oligomers.
Claim 6
Dependent Claim
26 words
A rear projection screen as claimed in claim 4, wherein said photocurable composition comprises at least one compound containing one or more ethylenically unsaturated double bonds.
Claim 7
Dependent Claim
54 words
A rear projection screen as claimed in claim 5, wherein said rear projection screen is colored until its color temperature conversion capability reaches a color tone having a Mired shift value of about -5 to about -120 and the rear projection screen, as a whole, has a transmittance of about 40 to about 70%.
Claim 8
Dependent Claim
17 words
A rear projection screen as claimed in claim 6, wherein said light diffusion layer is a wax.
Claim 9
Dependent Claim
18 words
A rear projection screen as claimed in claim 6, wherein said light diffusion layer is a crystalline polymer.
Claim 10
Dependent Claim
55 words
A rear projection screen as claimed in claim 5, wherein said light diffusion layer has a V-groove lenticular lens structure with a pitch of from about 0.03 to about 1 mm and a top angle of from about 90° to about 150° on the side thereof which is to face a light source during use.
Claim 11
Dependent Claim
16 words
A rear projection screen as claimed in claim 9, wherein said light diffusion layer is wax.
Claim 12
Dependent Claim
18 words
A rear projection screen as claimed in claim 9, wherein said light diffusion layer is a crystalline polymer.
Claim 13
Dependent Claim
57 words
A rear projection screen as claimed in claim 5, wherein said light diffusion layer has a Fresnel lens structure with a pitch of from about 0.03 mm to about 1 mm and a focal length of from about 20 cm to about 100 cm on the side thereof which is to face a light source during use.
Claim 14
Dependent Claim
17 words
A rear projection screen as claimed in claim 12, wherein said light diffusion layer is a wax.
Claim 15
Dependent Claim
18 words
A rear projection screen as claimed in claim 12, wherein said light diffusion layer is a crystalline polymer.
Claim 16
Dependent Claim
46 words
A rear projection screen as claimed in claim 5 having the following stratum arrangement: transparent support; layer formed from a photocurable composition; light diffusion layer; layer formed from a photocurable composition; transparent support; wherein said supports have a thickness of not more than about 0.5 mm.
Claim 17
Dependent Claim
17 words
A rear projection screen as claimed in claim 15, wherein said light diffusion layer is a wax.
Claim 18
Dependent Claim
18 words
A rear projection screen as claimed in claim 15, wherein said light diffusion layer is a crystalline polymer.
References Cited (Backward Citations)
US3351409A
Cited
US3527519A
Cited
US3653740A
Cited
US3832031A
Cited
US3674338A
Cited
US3779630A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-10 | 1981-10-10 | 1982-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-10 | 1985-10-10 | 1986-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-10 | 1989-10-10 | 1990-04-11 | $7700.00 | Window Closed / Lapsed |