US4594282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Layer structure of thin-film electroluminescent display panel
Assignee: Sharp Corp
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Filing: 1983-12-01
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Granted: 1986-06-10
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Expires: 2003-12-01
Abstract
Abstract A thin-film electroluminescent (EL) element comprises a thin-film electroluminescent layer, first and second dielectric layers for supporting the element layer, the first dielectric layer being disposed on a smooth surface and the second dielectric layer being disposed on an uneven surface, the thickness of the first dielectric layer being thicker than that of the second dielectric layer such that the dielectric properties of the element are assured, and first and second electrodes provided on the dielectric layers, respectively.
Inventors
- 👤 Masashi Kawaguchi
- 👤 Kinichi Isaka
- 👤 Yoshihiro Endo
- 👤 Hiroshi Kishishita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:52
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/22; Y; Y10; Y10S; Y10S428/00; Y10S428/917; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
66 words
A thin-film electroluminescent element comprising: a thin-film electroluminescent layer; first and second dielectric layers surrounding the electroluminescent layer, the first dielectric layer being disposed on a smooth surface and the second dielectric layer being disposed on an uneven surface; the thickness of the first dielectric layer being thicker than that of the second dielectric layer; and first and second electrodes provided on the dielectric layers, respectively.
Claim 2
Dependent Claim
66 words
A thin-film electroluminescent element comprising: a thin-film electroluminescent layer; first and second dielectric layers surrounding the electroluminescent layer, the first dielectric layer being disposed on a smooth surface and the second dielectric layer being disposed on an uneven surface; the thickness of the first dielectric layer being thicker than that of the second dielectric layer; and first and second electrodes provided on the dielectric layers, respectively.
Claim 3
Dependent Claim
41 words
The element of claim 1, wherein the thickness of the first and the second dielectric layers fulfills the following condition: 1<(d1/d2)<3 wherein, d1 represents the thickness of the first dielectric layer, and d2 represents the thickness of the second dielectric layer.
Claim 4
Dependent Claim
26 words
The element of claim 1, wherein the total thickness of the first and the second dielectric layers is equal to or less than about 4000 Å.
Claim 5
Dependent Claim
17 words
The element of claim 1, wherein the thickness of the first dielectric layer is about 2200 Å.
Claim 6
Dependent Claim
17 words
The element of claim 1, wherein the thickness of the second dielectric layer is about 1800 Å.
Claim 7
Dependent Claim
25 words
The element of claim 1, wherein the first electrode in contact with the first dielectric layer is disposed on a substrate for supporting the element.
Claim 8
Dependent Claim
19 words
The element of claim 1, wherein either of the first and the second dielectric layers is a double layer.
Claim 9
Dependent Claim
35 words
The element of claim 7, wherein said double layer comprises an SiO 2 layer and an Si 3 N 4 layer, or an Si 3 N 4 layer and an Al 2 O 3 layer.
Claim 10
Dependent Claim
90 words
A thin film electroluminescent element comprising: a thin film electroluminescent layer; first and second dielectric layers surrounding said electroluminescent layer, said first dielectric layer being disposed on a smooth surface and said second dielectric layer being disposed on an uneven surface; first and second electrodes provided on said dielectric layers; and the thickness of said first dielectric layer being greater than that of said second dielectric layer such that 1<(d1/d2)<3, wherein d1 represents the thickness of said first dielectric layer and d2 represents the thickness of said second dielectric layer.
Claim 11
Dependent Claim
90 words
A thin film electroluminescent element comprising: a thin film electroluminescent layer; first and second dielectric layers surrounding said electroluminescent layer, said first dielectric layer being disposed on a smooth surface and said second dielectric layer being disposed on an uneven surface; first and second electrodes provided on said dielectric layers; and the thickness of said first dielectric layer being greater than that of said second dielectric layer such that 1<(d1/d2)<3, wherein d1 represents the thickness of said first dielectric layer and d2 represents the thickness of said second dielectric layer.
Claim 12
Dependent Claim
26 words
The element of claim 9, wherein the total thickness of the first and the second dielectric layers is equal to or less than about 4000 Å.
Claim 13
Dependent Claim
17 words
The element of claim 9, wherein the thickness of the first dielectric layer is about 2200 Å.
Claim 14
Dependent Claim
17 words
The element of claim 9, wherein the thickness of the second dielectric layer is about 1800 Å.
Claim 15
Dependent Claim
25 words
The element of claim 9, wherein the first electrode in contact with the first dielectric layer is disposed on a substrate for supporting the element.
Claim 16
Dependent Claim
19 words
The element of claim 9, wherein either of the first and the second dielectric layers is a double layer.
Claim 17
Dependent Claim
34 words
The element of claim 14, wherein said double layer comprises an SiO 2 layer and an Si 3 N 4 layer, or an Si 3 N 4 and an Al 2 O 3 layer.
Claim 18
Dependent Claim
114 words
A thin film electroluminescent element comprising: a first electrode having a smooth outer surface; a first dielectric layer disposed on the smooth surface of said first electrode; a thin-film electroluminescent layer disposed on said first dielectric layer, said thin-film electroluminescent layer having an uneven outer surface; a second dielectric layer disposed on the uneven surface of said electroluminescent layer; a second electrode provided on said second dielectric layer; and the thickness of said first dielectric layer being greater than that of said second dielectric layer such that 1<(d1/d2)<3 and d1+d2 equals about 4000 Å, wherein d1 represents the thickness of said first dielectric layer and d2 represents the thickness of said second dielectric layer.
Claim 19
Dependent Claim
114 words
A thin film electroluminescent element comprising: a first electrode having a smooth outer surface; a first dielectric layer disposed on the smooth surface of said first electrode; a thin-film electroluminescent layer disposed on said first dielectric layer, said thin-film electroluminescent layer having an uneven outer surface; a second dielectric layer disposed on the uneven surface of said electroluminescent layer; a second electrode provided on said second dielectric layer; and the thickness of said first dielectric layer being greater than that of said second dielectric layer such that 1<(d1/d2)<3 and d1+d2 equals about 4000 Å, wherein d1 represents the thickness of said first dielectric layer and d2 represents the thickness of said second dielectric layer.
Claim 20
Dependent Claim
17 words
The element of claim 16, wherein d1 is about 2200 Å and d2 is about 1800 Å.
Claim 21
Dependent Claim
25 words
The element of claim 16, wherein the first electrode in contact with the first dielectric layer is disposed on a substrate for supporting the element.
Claim 22
Dependent Claim
19 words
The element of claim 16, wherein either of the first and the second dielectric layers is a double layer.
Claim 23
Dependent Claim
35 words
The element of claim 19, wherein said double layer comprises an SiO 2 layer and an Si 3 N 4 layer, or an Si 3 N 4 layer and an Al 2 O 3 layer.
Claim 24
Dependent Claim
107 words
A thin film electroluminescent element comprising: a thin film electroluminescent layer; first and second dielectric layers surrounding said electroluminescent layer, said first dielectric layer being disposed on a smooth surface and said second dielectric layer being disposed on an uneven surface; first and second electrodes provided on said dielectric layers; and the thickness of said first dielectric layer being greater than that of said second dielectric layer such that 1<(d1/d2)<3 and d1+d2 equals about 4000 Å, wherein d1 represents the thickness of said first dielectric layer and d2 represents the thickness of said second dielectric layer, and such that the generation of dielectric breakdown is substantially prevented.
Claim 25
Dependent Claim
107 words
A thin film electroluminescent element comprising: a thin film electroluminescent layer; first and second dielectric layers surrounding said electroluminescent layer, said first dielectric layer being disposed on a smooth surface and said second dielectric layer being disposed on an uneven surface; first and second electrodes provided on said dielectric layers; and the thickness of said first dielectric layer being greater than that of said second dielectric layer such that 1<(d1/d2)<3 and d1+d2 equals about 4000 Å, wherein d1 represents the thickness of said first dielectric layer and d2 represents the thickness of said second dielectric layer, and such that the generation of dielectric breakdown is substantially prevented.
Claim 26
Dependent Claim
17 words
The element of claim 21, wherein d1 is about 2200 Å and d2 is about 1800 Å.
Claim 27
Dependent Claim
16 words
A thin film electroluminescent element as in claim 9, wherein (d1/d2) is at least about 1.2.
Claim 28
Dependent Claim
14 words
A thin film electroluminescent element as in claim 9, wherein (d1/d2) equals about 1.2.
Claim 29
Dependent Claim
16 words
A thin film electroluminescent element as in claim 16, wherein (d1/d2) is at least about 1.2.
Claim 30
Dependent Claim
14 words
A thin film electroluminescent element as in claim 16, wherein (d1/d2) equals about 1.2.
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) | 1989-06-09 | 1989-12-09 | 1990-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-09 | 1993-12-09 | 1994-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-09 | 1997-12-09 | 1998-06-10 | $7700.00 | Window Closed / Lapsed |