US4792500A
Expired / Lapsed
US
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Electroluminescence element
Assignee: Faurecia Clarion Electronics Co Ltd
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Filing: 1987-08-17
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Granted: 1988-12-20
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Expires: 2007-08-17
Abstract
Abstract A field electroluminescence element has a transparent electrode disposed to form a single-level plane with a substrate surface so that a luminescence layer is provided on the planar surface in order to prevent any irregular crystallization and to improve the reliability of the element.
Inventors
- 👤 Kiyoaki Kojima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:31
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/26; H05B33/28; Y; Y10; Y10S; Y10S428/00; Y10S428/917
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
115 words
A field electroluminescence element comprising: an insulative substrate; a first insulative layer formed on said insulative substrate and having a planar surface, said first insulative layer having extending from said surface into the interior of said layer and a plurality of transparent conducting regions forming a first set of spaced-apart electrodes embedded in said layer; a second planar insulative layer disposed on said first insulative layer; a luminescent layer disposed on said second insulative layer surface; a third insulative layer disposed on said luminescent layer; and a second set of spaced-apart transparent electrodes disposed on said third insulative layer, said second set of electrodes being opposed to and disposed across the first set of electrodes.
Claim 2
Dependent Claim
115 words
A field electroluminescence element comprising: an insulative substrate; a first insulative layer formed on said insulative substrate and having a planar surface, said first insulative layer having extending from said surface into the interior of said layer and a plurality of transparent conducting regions forming a first set of spaced-apart electrodes embedded in said layer; a second planar insulative layer disposed on said first insulative layer; a luminescent layer disposed on said second insulative layer surface; a third insulative layer disposed on said luminescent layer; and a second set of spaced-apart transparent electrodes disposed on said third insulative layer, said second set of electrodes being opposed to and disposed across the first set of electrodes.
Claim 3
Dependent Claim
99 words
A field electroluminescence element comprising: an insulative substrate having a planar surface, said substrate having extending from said surface into the interior of said substrate a plurality of transparent conducting regions forms a first set of spaced-apart electrodes embedded in said substrate; a first insulative layer disposed on said substrate surface; a luminescent layer disposed on said first insulative layer; a second insulative layer disposed on said luminescent layer; and a second set of spaced-apart transparent electrodes disposed on said second insulative layer, said second set of electrodes being opposed to and disposed across the first set of electrodes.
Claim 4
Dependent Claim
99 words
A field electroluminescence element comprising: an insulative substrate having a planar surface, said substrate having extending from said surface into the interior of said substrate a plurality of transparent conducting regions forms a first set of spaced-apart electrodes embedded in said substrate; a first insulative layer disposed on said substrate surface; a luminescent layer disposed on said first insulative layer; a second insulative layer disposed on said luminescent layer; and a second set of spaced-apart transparent electrodes disposed on said second insulative layer, said second set of electrodes being opposed to and disposed across the first set of electrodes.
Claim 5
Dependent Claim
27 words
The electroluminescence element of claim 1 wherein said transparent conducting regions are formed by locally exposing portions of said first insulative layer to a conductivity-forming doping agent.
Claim 6
Dependent Claim
26 words
The electroluminescence element of claim 2 wherein said transparent conducting regions are formed by locally exposing portions of said insulative substrate to a conductivity-forming doping agent.
References Cited (Backward Citations)
US3621321A
Cited
US3772556A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-12-20 | 1992-06-20 | 1992-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-20 | 1996-06-20 | 1996-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-20 | 2000-06-20 | 2000-12-20 | $7700.00 | Window Closed / Lapsed |