Patent US4855641A successfully refreshed from Google Patents.
US4855641A
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Transparent electrodes of thin-film electroluminescence panel
Assignee: Sharp Corp
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Filing: 1988-03-11
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Granted: 1989-08-08
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Expires: 2008-03-11
Abstract
Abstract A thin-film EL panel of the layer structure with transparent electrodes and back electrodes sandwiching therebetween insulative layers and a light-emitting layer and forming display picture elements on the panel is characterized as having the transparent electrodes shaped differently at these display picture elements and other places.
Inventors
- 👤 Noriaki Nakamura
- 👤 Masashi Kawaguchi
- 👤 Yasuo Sonoyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:16
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/26; H05B33/28
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
74 words
In a thin-film EL panel having transparent electrodes formed on a substrate and a first insulative layer, a light-emitting layer, a second insulative layer and back electrodes stacked in this order on said transparent electrodes to define display picture elements on said panel, the improvement wherein the resistance value of parts of said transparent electrodes other than said display picture elements is so controlled as to reduce the occurrence of large breakdown points thereon.
Claim 2
Dependent Claim
74 words
In a thin-film EL panel having transparent electrodes formed on a substrate and a first insulative layer, a light-emitting layer, a second insulative layer and back electrodes stacked in this order on said transparent electrodes to define display picture elements on said panel, the improvement wherein the resistance value of parts of said transparent electrodes other than said display picture elements is so controlled as to reduce the occurrence of large breakdown points thereon.
Claim 3
Dependent Claim
23 words
The thin-film EL panel of claim 1 wherein said transparent electrodes are elongated and are narrower at said display picture elements than elsewhere.
Claim 4
Dependent Claim
23 words
The thin-film EL panel of claim 1 wherein said transparent electrodes are elongated and are broader at said display picture elements than elsewhere.
Claim 5
Dependent Claim
20 words
The thin-film EL panel of claim 2 wherein said transparent electrodes comprise indium oxide and have calculated resistance of 1kΩ-9.5kΩ.
Claim 6
Dependent Claim
20 words
The thin-film EL panel of claim 3 wherein said transparent electrodes comprise indium oxide and have calculated resistance of 1kΩ-9.5kΩ.
References Cited (Backward Citations)
US3289198A
Cited
US3717800A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-07 | 1993-02-06 | 1993-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-07 | 1997-02-06 | 1997-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-07 | 2001-02-06 | 2001-08-08 | $7700.00 | Window Closed / Lapsed |