US5434706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission type screen and method of manufacturing thereof
Assignee: Kuraray Co Ltd
•
Filing: 1992-11-12
•
Granted: 1995-07-18
•
Expires: 2012-11-12
Abstract
Abstract A lenticular lens provided on the viewer side of a transmission type screen is composed of at least two layers, that is, a surface layer and a base layer at least one of which contains a light dispersing material, and a visible light absorbing material is mingled in at least one of these two layers, or in the light dispersing material, thereby enhancing the image contrast of the transmission type screen.
Inventors
- 👤 Katsuaki Mitani
- 👤 Noboru Yasumatsuya
- 👤 Ichiro Matsuzaki
- 👤 Hiroshi Kuwada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:38
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; G03B21/62; G03B21/625
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
137 words
A transmission type screen having an incidence side and an emission side, comprising: a Fresnel lens means disposed on the incidence side of said screen, a lenticular lenses means disposed on the emission side of said screen, wherein said lenticular means comprises a surface layer and a base layer, each of which contains a light dispersing material, the content of the light dispersing material is larger in said surface layer than in said base layer, and at least one of said surface layer, said base layer and said light dispersing material contains a visible light absorbing material, the light absorptivity property of said visible light absorbing material being on average (i) less than 50% in a wavelength range of 400 to 490 nm, and (ii) 30% to 80% in a wavelength range of 490 to 700 nm.
Claim 2
Dependent Claim
137 words
A transmission type screen having an incidence side and an emission side, comprising: a Fresnel lens means disposed on the incidence side of said screen, a lenticular lenses means disposed on the emission side of said screen, wherein said lenticular means comprises a surface layer and a base layer, each of which contains a light dispersing material, the content of the light dispersing material is larger in said surface layer than in said base layer, and at least one of said surface layer, said base layer and said light dispersing material contains a visible light absorbing material, the light absorptivity property of said visible light absorbing material being on average (i) less than 50% in a wavelength range of 400 to 490 nm, and (ii) 30% to 80% in a wavelength range of 490 to 700 nm.
Claim 3
Dependent Claim
171 words
A transmission type screen having an incidence side and an emission side, comprising: a Fresnel lens means disposed on the incidence side of said screen, and a lenticular lens means disposed on the emission side of said screen, wherein: said lenticular lens means comprises a surface layer (first layer) which is nearest to the emission side and which contains a light dispersing material, an intermediate layer (second layer) which does not contain the light dispersing material, and a base layer (third layer) which contains the light dispersing material in a contact which is smaller than that in said surface layer, at least one of said surface layer (first layer), said intermediate layer (second layer), said base layer (third layer) and the light dispersing material contains a visible light absorbing material, and the light absorptivity property of said visible light absorbing material is on average (i) less than 50% in a wavelength range of 400 to 490 nm, and (ii) 30% to 80% in a wavelength range of 490 to 700 nm.
Claim 4
Dependent Claim
171 words
A transmission type screen having an incidence side and an emission side, comprising: a Fresnel lens means disposed on the incidence side of said screen, and a lenticular lens means disposed on the emission side of said screen, wherein: said lenticular lens means comprises a surface layer (first layer) which is nearest to the emission side and which contains a light dispersing material, an intermediate layer (second layer) which does not contain the light dispersing material, and a base layer (third layer) which contains the light dispersing material in a contact which is smaller than that in said surface layer, at least one of said surface layer (first layer), said intermediate layer (second layer), said base layer (third layer) and the light dispersing material contains a visible light absorbing material, and the light absorptivity property of said visible light absorbing material is on average (i) less than 50% in a wavelength range of 400 to 490 nm, and (ii) 30% to 80% in a wavelength range of 490 to 700 nm.
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) | 1998-07-17 | 1999-01-16 | 1999-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-07-17 | 2003-01-16 | 2003-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-07-17 | 2007-01-16 | 2007-07-18 | $7700.00 | Window Closed / Lapsed |