US5604398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroluminescence light-emitting device with multi-layer light-emitting structure
Assignee: Pendragon Electronics and Telecommunications Research LLC
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Filing: 1994-12-19
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Granted: 1997-02-18
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Expires: 2014-12-19
Abstract
Abstract Disclosed is an electroluminescence light-emitting device for generating an optical wavelength, comprises a substrate; an ITO layer coated on the substrate, at lest two light-emitting layers sequentially formed on the ITO layer and having a different band gap, and a metal electrode formed on an upper light-emitting layer of the at least two light-emitting layers, wherein the ITO layer is used as an anode and the metal electrode is used as a cathode.
Inventors
- 👤 Tae-Hyoung Zyung
- 👤 Jang-Joo Kim
- 👤 Wol-Yon Hwang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:46
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; H10; H10K; H10K50/00; H10K50/10; H10K50/11; H10K50/125; H10K50/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
An electroluminescence light-emitting device for generating an optical wavelength, the device comprising: a substrate; an ITO layer posed on the substrate; at least one pair of opposed and contacting light-emitting layers creating an interface with each light-emitting layer emitting light of an optical wavelength different from each other light-emitting layer, each interface emitting light of an optical wavelength different from the light emitted from the light-emitting layers and the interface of any other pair of opposed light-emitting layers; and a metal electrode formed on an upper light-emitting layer of at least one pair of light-emitting layers; and wherein the ITO layer is an anode and the metal electrode is a cathode and each light-emitting layer is formed from an organic polymer.
Claim 2
Dependent Claim
121 words
An electroluminescence light-emitting device for generating an optical wavelength, the device comprising: a substrate; an ITO layer posed on the substrate; at least one pair of opposed and contacting light-emitting layers creating an interface with each light-emitting layer emitting light of an optical wavelength different from each other light-emitting layer, each interface emitting light of an optical wavelength different from the light emitted from the light-emitting layers and the interface of any other pair of opposed light-emitting layers; and a metal electrode formed on an upper light-emitting layer of at least one pair of light-emitting layers; and wherein the ITO layer is an anode and the metal electrode is a cathode and each light-emitting layer is formed from an organic polymer.
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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) | 2000-02-18 | 2000-08-19 | 2001-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-02-18 | 2004-08-19 | 2005-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-02-18 | 2008-08-19 | 2009-02-18 | $7700.00 | Window Closed / Lapsed |