Patent US4447757A successfully refreshed from Google Patents.
US4447757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structure of thin-film electroluminescent display panel sealed by glass substrates
Assignee: Sharp Corp
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Filing: 1981-06-11
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Granted: 1984-05-08
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Expires: 2001-06-11
Abstract
Abstract A thin electroluminescent (EL) display panel is disclosed which comprises an EL thin film unit for generating an EL light, two glass substrates for sealing the EL thin film unit, a protective liquid filled within a cavity defined by the two glass substrates for protecting the EL thin film unit, a pair of electrodes for conducting electric energy to the EL thin film unit, an injection hole for introducing the protective liquid, the injection hole being sealed, and a covering member for completely covering the sealed injection hole.
Inventors
- 👤 Masashi Kawaguchi
- 👤 Toshiaki Ishii
- 👤 Kinichi Isaka
- 👤 Hisashi Uede
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:48
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/02; H05B33/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
145 words
A thin film electroluminescent display panel comprising: first and second substrates disposed so as to define a cavity therebetween; a composite comprising a thin-film electroluminescent layer interpositioned between a pair of dielectric layers, said composite being disposed within said cavity, at least one of said first and second substrates being transparent to light emitted by said electroluminescent layer when said layer is stimulated; a pair of opposing electrodes positioned so as to sandwich said composite therebetween; a protective liquid provided within said cavity defined by said substrates and being in contact with said dielectric layers; an injection hole formed in at least one of said first and second substrates for introducing said protective liquid into said cavity, said substrate in which said injection hole is formed being glass, said injection hole being sealed; and a glass covering means for completely covering said sealed injection hole.
Claim 2
Dependent Claim
145 words
A thin film electroluminescent display panel comprising: first and second substrates disposed so as to define a cavity therebetween; a composite comprising a thin-film electroluminescent layer interpositioned between a pair of dielectric layers, said composite being disposed within said cavity, at least one of said first and second substrates being transparent to light emitted by said electroluminescent layer when said layer is stimulated; a pair of opposing electrodes positioned so as to sandwich said composite therebetween; a protective liquid provided within said cavity defined by said substrates and being in contact with said dielectric layers; an injection hole formed in at least one of said first and second substrates for introducing said protective liquid into said cavity, said substrate in which said injection hole is formed being glass, said injection hole being sealed; and a glass covering means for completely covering said sealed injection hole.
Claim 3
Dependent Claim
35 words
The display panel of claim 1, wherein said first and second substrate comprise a transparent plane glass substrate and a plate-shaped glass substrate respectively, and said injection hole is formed in said plate-shaped glass substrate.
Claim 4
Dependent Claim
12 words
The element of claim 1, wherein the protective liquid is silicone oil.
Claim 5
Dependent Claim
11 words
The element of claim 1, wherein the protective liquid is grease.
Claim 6
Dependent Claim
159 words
A thin electroluminescent display panel comprising: first and second substrates disposed so as to define a cavity therebetween; a composite comprising a thin-film electroluminescent layer interpositioned between a pair of dielectric layers, said composite being disposed within said cavity, at least one of said first and second substrates being transparent to light emitted by said electroluminescent layer when said layer is stimulated; a pair of opposing electrodes positioned so as to sandwich said composite therebetween; a protective liquid provided with said cavity defined by said substrates and being in contact with said dielectric layers; an injection hole formed in at least one of said first and second substrates for introducing said protective liquid into said cavity, said substrate in which said injection hole is formed being glass, said injection hole being sealed; and a glass covering means for completely covering said sealed injection hole such that a compartment is formed between said sealed injection hole and said covering means.
Claim 7
Dependent Claim
159 words
A thin electroluminescent display panel comprising: first and second substrates disposed so as to define a cavity therebetween; a composite comprising a thin-film electroluminescent layer interpositioned between a pair of dielectric layers, said composite being disposed within said cavity, at least one of said first and second substrates being transparent to light emitted by said electroluminescent layer when said layer is stimulated; a pair of opposing electrodes positioned so as to sandwich said composite therebetween; a protective liquid provided with said cavity defined by said substrates and being in contact with said dielectric layers; an injection hole formed in at least one of said first and second substrates for introducing said protective liquid into said cavity, said substrate in which said injection hole is formed being glass, said injection hole being sealed; and a glass covering means for completely covering said sealed injection hole such that a compartment is formed between said sealed injection hole and said covering means.
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) | 1987-05-08 | 1987-11-07 | 1988-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-08 | 1991-11-07 | 1992-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-08 | 1995-11-07 | 1996-05-08 | $7700.00 | Window Closed / Lapsed |