US5012156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispersion-type electroluminescence device
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1988-09-28
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Granted: 1991-04-30
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Expires: 2008-09-28
Abstract
Abstract The object of the present invention is to provide a dispersion-type electroluminescence device low in current density, excellent in luminous efficiency and less in uneven luminance. For attaining this object, dented portions present in an upper part of a luminous layer of dispersion-type electroluminescence device having a back electrode layer and, laminated thereon, an insulator layer, a luminous layer and a transparent electrode layer are coated with a resin composition having a dielectric constant which is lower than that of a dielectric resin composition used for formation of the luminous layer which is 5 or higher and a transparent electrode layer is than laminated thereon.
Inventors
- 👤 Hidekimi Kadokura
- 👤 Hiroshi Yoshitake
- 👤 Masayoshi Tanahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:19
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/20; H05B33/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A dispersion-type electroluminescence device comprising a back electrode layer and, laminated thereon, an insulator layer, a luminous layer and a transparent electrode layer wherein dented portions present in the upper part of the luminous layer are coated with a resin composition having a dielectric constant which is at least about 5 but lower than that of the dielectric resin composition, which is at least 15, used for formation of the luminous layer and which is, the thickness of coating of the dielectric resin composition formed in the dented portions of the luminous layer being not greater than about 5μ over a peak of the highest projecting portion of the luminous layer.
Claim 2
Dependent Claim
111 words
A dispersion-type electroluminescence device comprising a back electrode layer and, laminated thereon, an insulator layer, a luminous layer and a transparent electrode layer wherein dented portions present in the upper part of the luminous layer are coated with a resin composition having a dielectric constant which is at least about 5 but lower than that of the dielectric resin composition, which is at least 15, used for formation of the luminous layer and which is, the thickness of coating of the dielectric resin composition formed in the dented portions of the luminous layer being not greater than about 5μ over a peak of the highest projecting portion of the luminous layer.
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) | 1994-04-29 | 1994-10-29 | 1995-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-29 | 1998-10-29 | 1999-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-29 | 2002-10-29 | 2003-04-30 | $7700.00 | Window Closed / Lapsed |