Patent US5557295A successfully refreshed from Google Patents.
US5557295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display panel
Assignee: NIPPON SIEKI KK
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Filing: 1992-11-06
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Granted: 1996-09-17
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Expires: 2012-11-06
Abstract
Abstract A display panel integrated with EL can be obtained by printing EL at the back of a light permeable substrate, and covering the front surface of the substrate and the rearface of EL with a moisture proof film for insulating and protecting the EL from the surrounding atmosphere. Alternatively, the film may cover the substrate and EL entirely. An indication mark is printed at the surface of the moisture proof film or the light permeable substrate. The light permeable front electrode, the light emission layer and the back electrode are successively printed to the rearface of the light permeable substrate. If the indication mark is printed on the surface of the substrate, the attenuation of decay of the light emission from the emission layer can be suppressed and the brightness of the display mark improved by not forming the insulation layer at the back of the substrate. Alternatively, by forming the insulation layer at the back of the substrate, the entire thickness and the weight of the display panel can be decreased and the production step simplified.
Inventors
- 👤 Sadamasa Miyashita
- 👤 Laiying Zhang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:37
CPC Classifications
G; G09; G09F; G09F13/00; G09F13/04; G09F13/20; G09F13/22; B; B60; B60K; B60K35/00; B60K35/20; B60K35/21; B60K35/22; B60K35/28; B60Q; B60Q3/00; B60Q3/10; B60Q3/14; B60Q3/16; B60Q3/80; B60Q3/85; G01; G01D; G01D11/00; G01D11/28; G09F2013/222; G09F2013/227
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
87 words
A display panel comprising: a light permeable substrate having an indication mark on the surface thereof; and a light permeable front electrode, a light emission layer, a back electrode and an insulating layer successively formed at the back of the light permeable substrate; wherein (i) the light permeable front electrode, the light emission layer, the back electrode and the insulating layer are formed by screen printing and (ii) the insulating layer insulates said front electrode, said light emission layer and said back electrode from the surrounding atmosphere.
Claim 2
Dependent Claim
87 words
A display panel comprising: a light permeable substrate having an indication mark on the surface thereof; and a light permeable front electrode, a light emission layer, a back electrode and an insulating layer successively formed at the back of the light permeable substrate; wherein (i) the light permeable front electrode, the light emission layer, the back electrode and the insulating layer are formed by screen printing and (ii) the insulating layer insulates said front electrode, said light emission layer and said back electrode from the surrounding atmosphere.
Claim 3
Dependent Claim
22 words
A display panel according to claim 1, wherein the light permeable front electrode is in a shape corresponding to an indication mark.
Claim 4
Dependent Claim
23 words
A display panel according to claim 2, wherein said light emission layer has substantially the same shape as the light permeable front electrode.
Claim 5
Dependent Claim
21 words
A display panel according to claim 1, wherein the insulating layer is formed by applying an insulating material in liquid form.
Claim 6
Dependent Claim
40 words
A display panel according to claim 1, wherein the insulating layer is formed so as to cover surfaces of the light permeable front electrode, the light emission layer, and the back electrode and a back surface of the back electrode.
Claim 7
Dependent Claim
16 words
A display panel according to claim 1, wherein the indication mark is formed by screen printing.
Claim 8
Dependent Claim
14 words
A display panel according to claim 1, wherein the insulating layer is moisture proof.
Claim 9
Dependent Claim
173 words
A display panel comprising: a light permeable substrate having an indication mark on the surface thereof; and a light permeable front electrode, a light emission layer, a back electrode and an insulating layer successively formed at the back of the light permeable substrate; wherein: the light permeable front electrode, the light emission layer, the back electrode and the insulating layer are formed by screen printing; the back of the light permeable substrate has a first surface portion and a second surface portion, and the light permeable front electrode is formed to be in contact with only the first surface portion; and the insulating layer insulates said front electrode, said light emission layer and said back electrode from the surrounding atmosphere and is formed so as (i) to entirely cover side surfaces of the light permeable front electrode, the light emission layer, and the back electrode and a back surface of the back electrode, and (ii) to be in contact with only the second surface portion of the back of the light permeable substrate.
Claim 10
Dependent Claim
173 words
A display panel comprising: a light permeable substrate having an indication mark on the surface thereof; and a light permeable front electrode, a light emission layer, a back electrode and an insulating layer successively formed at the back of the light permeable substrate; wherein: the light permeable front electrode, the light emission layer, the back electrode and the insulating layer are formed by screen printing; the back of the light permeable substrate has a first surface portion and a second surface portion, and the light permeable front electrode is formed to be in contact with only the first surface portion; and the insulating layer insulates said front electrode, said light emission layer and said back electrode from the surrounding atmosphere and is formed so as (i) to entirely cover side surfaces of the light permeable front electrode, the light emission layer, and the back electrode and a back surface of the back electrode, and (ii) to be in contact with only the second surface portion of the back of the light permeable substrate.
Claim 11
Dependent Claim
22 words
A display panel according to claim 8, wherein the light permeable front electrode is in a shape corresponding to an indication mark.
Claim 12
Dependent Claim
23 words
A display panel according to claim 9, wherein said light emission layer has substantially the same shape as the light permeable front electrode.
Claim 13
Dependent Claim
21 words
A display panel according to claim 8, wherein the insulating layer is formed by applying an insulating material in liquid form.
Claim 14
Dependent Claim
16 words
A display panel according to claim 8, wherein the indication mark is formed by screen printing.
Claim 15
Dependent Claim
14 words
A display panel according to claim 8, wherein the insulating layer is moisture proof.
Claim 16
Dependent Claim
102 words
A display panel comprising: a light permeable substrate having an indication mark on the surface thereof; and a light permeable front electrode, a light emission layer, a back electrode and an insulating layer formed at the back of the light permeable substrate; wherein the back of the light permeable substrate has a first surface portion and a second surface portion, and the light permeable front electrode is formed to be in contact with only the first surface portion and the insulating layer is formed to be in contact with only the second surface portion of the back of the light permeable substrate.
Claim 17
Dependent Claim
102 words
A display panel comprising: a light permeable substrate having an indication mark on the surface thereof; and a light permeable front electrode, a light emission layer, a back electrode and an insulating layer formed at the back of the light permeable substrate; wherein the back of the light permeable substrate has a first surface portion and a second surface portion, and the light permeable front electrode is formed to be in contact with only the first surface portion and the insulating layer is formed to be in contact with only the second surface portion of the back of the light permeable substrate.
Claim 18
Dependent Claim
28 words
A display panel according to claim 14, wherein said light permeable front electrode and said light emission layer are substantially in a shape corresponding to the indication mark.
Claim 19
Dependent Claim
21 words
A display panel according to claim 14, wherein the insulating layer is formed by applying an insulating material in liquid form.
Claim 20
Dependent Claim
16 words
A display panel according to claim 14, wherein the indication mark is formed by screen printing.
Claim 21
Dependent Claim
14 words
A display panel according to claim 14, wherein the insulating layer is moisture proof.
Claim 22
Dependent Claim
30 words
A display panel according to claim 14, wherein the light permeable front electrode, the light emission layer, the back electrode and the insulating layer are successively formed by screen printing.
Claim 23
Dependent Claim
57 words
A display panel according to claim 14, wherein the insulating layer is formed to entirely cover side surfaces of the light permeable front electrode, the light emission layer, and the back electrode and a back surface of the back electrode and insulates said front electrode, said light emission layer and said back electrode from the surrounding atmosphere.
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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) | 1999-09-17 | 2000-03-18 | 2000-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-09-17 | 2004-03-18 | 2004-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-09-17 | 2008-03-18 | 2008-09-17 | $7700.00 | Window Closed / Lapsed |