Patent US5124204A successfully refreshed from Google Patents.
US5124204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin film electroluminescent (EL) panel
Assignee: Sharp Corp
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Filing: 1991-03-29
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Granted: 1992-06-23
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Expires: 2011-03-29
Abstract
Abstract Disclosed is a thin film EL panel having a high reliability. The thin film El panel is thin, light, and is made at a low cost. The present invention provides in a thin film electroluminescent (EL) panel comprising a light permeable base plate, a thin film EL element formed on the base plate and a moisture-proof sheet covered thereon, an improvement residing in that a moisture-absorption sheet is placed between said thin film EL element and said moisture-proof sheet, and said moisture-absorption sheet comprises an organic polymer sheet with silica gel powder dispersed therein at a certain surface density. The present invention also provides in a thin film electroluminescent (EL) panel comprising a light permeable base plate, a thin film EL element formed on the base plate and a moisture-proof sheet covered thereon, an improvement residing in that a moisture-absorption layer is formed on the inside surface of the moisture-proof sheet by coating powder thereon having moisture absorption properties.
Inventors
- 👤 Takuo Yamashita
- 👤 Masaru Yoshida
- 👤 Shigeo Nakajima
- 👤 Keiichi Uno
- 👤 Yoshiki Murakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:16
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/02; H05B33/04; Y; Y10; Y10S; Y10S428/00; Y10S428/917; Y10T; Y10T428/00; Y10T428/25; Y10T428/259
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
70 words
In a thin film electroluminescent (EL) panel comprising a light permeable base plate, a thin film EL element formed on the base plate and a moisture-proof sheet covered thereon, an improvement comprising a moisture-absorption sheet disposed between said thin film EL element and said moisture-proof sheet, wherein said moisture-absorption sheet comprises an organic polymer sheet with silica gel powder dispersed therein at a surface density of 10-500 g/m 2 .
Claim 2
Dependent Claim
70 words
In a thin film electroluminescent (EL) panel comprising a light permeable base plate, a thin film EL element formed on the base plate and a moisture-proof sheet covered thereon, an improvement comprising a moisture-absorption sheet disposed between said thin film EL element and said moisture-proof sheet, wherein said moisture-absorption sheet comprises an organic polymer sheet with silica gel powder dispersed therein at a surface density of 10-500 g/m 2 .
Claim 3
Dependent Claim
22 words
The thin film EL panel according to claim 1 wherein said moisture absorption sheet has a thickness of 0.01 to 1 mm.
Claim 4
Dependent Claim
17 words
The thin film EL panel according to claim 1 wherein said moisture absorption sheet is colored black.
Claim 5
Dependent Claim
62 words
The thin film EL panel according to claim 1 wherein said thin film EL element comprises a lower transparent electrode formed on said base plate, a lower-insulation layer formed on said lower transparent electrode, an electroluminescent layer formed on said lower insulation layer, an upper insulation layer formed on said electroluminescent layer and an upper electrode formed on said upper insulation layer.
Claim 6
Dependent Claim
53 words
The thin film EL panel according to claim 1 wherein said thin film EL element comprises a lower transparent electrode formed on said base plate, an electroluminescent layer formed on said lower transparent electrode, an upper insulation layer formed on said electroluminescent layer and an upper electrode formed on said upper insulation layer.
Claim 7
Dependent Claim
53 words
The thin film EL panel according to claim 1 wherein said thin film EL element comprises a lower transparent electrode formed on said base plate, a lower insulation layer formed on said lower transparent electrode, an electroluminescent layer formed on said lower insulation layer and an upper electrode formed on said electroluminescent layer.
Claim 8
Dependent Claim
22 words
The thin film EL panel according to claim 1 wherein said moisture-proof sheet comprises a metal film disposed between two organic films.
Claim 9
Dependent Claim
22 words
The thin film EL panel according to claim 10 wherein said organic films comprise polyester films and said metal film comprises aluminum.
Claim 10
Dependent Claim
30 words
The thin film EL panel according to claim 10 wherein said organic films and said metal film of said moisture-proof sheet each have a thickness of 5 to 50 μm.
Claim 11
Dependent Claim
21 words
The thin film EL panel according to claim 1 wherein said silica gel powder has a particle size of 1-4 microns.
Claim 12
Dependent Claim
64 words
In a thin film EL panel comprising a light permeable base plate, a thin film EL element formed on the base plate and a moisture-proof sheet covered thereon, an improvement comprising a moisture-absorption layer formed on the inside surface of the moisture-proof sheet by coating thereon silica gel powder having moisture absorption properties at a surface density of 10 to 500 g/m 2 .
Claim 13
Dependent Claim
64 words
In a thin film EL panel comprising a light permeable base plate, a thin film EL element formed on the base plate and a moisture-proof sheet covered thereon, an improvement comprising a moisture-absorption layer formed on the inside surface of the moisture-proof sheet by coating thereon silica gel powder having moisture absorption properties at a surface density of 10 to 500 g/m 2 .
Claim 14
Dependent Claim
17 words
The thin film EL panel according to claim 3 wherein said moisture absorption layer is colored black.
Claim 15
Dependent Claim
22 words
The thin film EL panel according to claim 3 wherein said moisture-proof sheet comprises a metal film disposed between two organic films.
Claim 16
Dependent Claim
22 words
The thin film EL panel according to claim 11 wherein said organic films comprise polyester films and said metal film comprises aluminum.
Claim 17
Dependent Claim
30 words
The thin film EL panel according to claim 11 wherein said organic films and said metal film of said moisture-proof sheet each have a thickness of 5 to 50 μm.
Claim 18
Dependent Claim
21 words
The thin film EL panel according to claim 3 wherein said silica gel powder has a particle size of 1-4 microns.
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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) | 1995-06-23 | 1995-12-23 | 1996-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-23 | 1999-12-23 | 2000-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-23 | 2003-12-23 | 2004-06-23 | $7700.00 | Window Closed / Lapsed |