US5068157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroluminescent element
Assignee: Samsung SDI Co Ltd
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Filing: 1989-10-26
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Granted: 1991-11-26
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Expires: 2009-10-26
Abstract
Abstract An electroluminescent element is disclosed in which the phosphor layer is composed of a ZnS phosphor added with the solution of BaTiO 3 and In 2 O 3 . The layer produces a strongly electric field, and is capable of having a high luminance under the condition of a low applied voltage.
Inventors
- 👤 Song Won
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:51
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/02; C09K11/025; H; H05; H05B; H05B33/00; H05B33/10; H05B33/12; H05B33/14; H05B33/20; H05B33/22; Y; Y10; Y10S; Y10S428/00; Y10S428/917; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12875
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
78 words
An electroluminescent element capable of high luminescence under low voltage comprising first and second electrodes with insulating and phosphor layers therebetween; said element comprising a first electrode, an insulating layer comprising cyanoethyl resin, a phosphor layer deposited upon the insulating layer, a second electrode on the phosphor layer and an enclosing film sealing said layers, said phosphor layer comprising ZnS phosphor to which has been added a solution of an organic insulating material, barium titanate and indium oxide.
Claim 2
Dependent Claim
78 words
An electroluminescent element capable of high luminescence under low voltage comprising first and second electrodes with insulating and phosphor layers therebetween; said element comprising a first electrode, an insulating layer comprising cyanoethyl resin, a phosphor layer deposited upon the insulating layer, a second electrode on the phosphor layer and an enclosing film sealing said layers, said phosphor layer comprising ZnS phosphor to which has been added a solution of an organic insulating material, barium titanate and indium oxide.
Claim 3
Dependent Claim
17 words
An electroluminescent element according to claim 1 wherein said solution of organic insulating material comprises cyanoethyl resin.
Claim 4
Dependent Claim
34 words
An electroluminescent element according to claim 1 wherein said insulating layer comprises 20% to 40% by weight cyanoethyl resin and 60% and 80% by weight of a mixture of acetonitrile, dimethylformamide and barium titanate.
Claim 5
Dependent Claim
36 words
An electroluminescent element according to claim 1 wherein said phosphor layer comprises, in wt %, 50% to 75% ZnS phosphor, 20% to 30% cyanoethyl resin, 5% to 10% indium oxide and 5% to 10% barium titanate.
Claim 6
Independent Claim
92 words
A method of making an electroluminescent element capable of high luminescence under low voltage comprising: providing a first electrode with an outer and an inner face; applying an insulating layer containing cyanoethyl resin onto the inner face of said first electrode; preparing a mixture of ZnS phosphor, cyanoethyl resin, indium oxide and barium titanate; applying said ZnS phosphor-containing mixture onto said insulating layer to provide a phosphor layer; applying a second electrode onto the phosphor layer; and sealing said layers with an enclosing film of moisture proof material of high luminescent transmission.
Claim 7
Independent Claim
92 words
A method of making an electroluminescent element capable of high luminescence under low voltage comprising: providing a first electrode with an outer and an inner face; applying an insulating layer containing cyanoethyl resin onto the inner face of said first electrode; preparing a mixture of ZnS phosphor, cyanoethyl resin, indium oxide and barium titanate; applying said ZnS phosphor-containing mixture onto said insulating layer to provide a phosphor layer; applying a second electrode onto the phosphor layer; and sealing said layers with an enclosing film of moisture proof material of high luminescent transmission.
Claim 8
Dependent Claim
50 words
A method according to claim 5 further comprising preparing an insulating layer of material comprising, in wt %, 20% to 40% cyanoethyl resin and 60% to 80% of a mixture of acetonitrile, dimethylformamide and barium titanate, and depositing said insulating layer material onto the inner face of the first electrode.
Claim 9
Dependent Claim
46 words
A method according to claim 5 further comprising preparing a mixture of, in wt %, 50% to 75% ZnS phosphor, 20% to 30% cyanoethyl resin, 5% to 10% indium oxide and 5% to 10% barium titanate, and depositing said ZnS phosphor-containing mixture onto said insulating layer.
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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) | 1994-11-25 | 1995-05-27 | 1995-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-25 | 1999-05-27 | 1999-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-25 | 2003-05-27 | 2003-11-26 | $7700.00 | Window Closed / Lapsed |