US4853594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroluminescent lamp
Assignee: Rogers Corp
•
Filing: 1988-08-10
•
Granted: 1989-08-01
•
Expires: 2008-08-10
Abstract
Abstract An electroluminescent lamp including a phosphor layer disposed between corresponding lamp electrodes that are adapted to apply an excitation potential to cause the phosphor layer to emit light, the front lamp electrode being light-transmsisive to radiation from the phosphor layer, has an improved front lamp electrode consisting of a thin layer of light-transmissive binder containing a distribution of discrete gallium-doped zinc oxide particles. A method of forming the lamp is also described.
Inventors
- 👤 Alan C. Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:57
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/26; H05B33/28; H05B33/10; Y; Y10; Y10S; Y10S428/00; Y10S428/917
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
64 words
In an electroluminescent lamp comprising a phosphor layer disposed between corresponding lamp electrodes that are adapted to apply an excitation potential to cause said phosphor layer to emit light, the front lamp electrode being light-transmissive to radiation from said phosphor layer, the improvement wherein, said front lamp electrode comprises a thin layer of light-transmissive binder containing a distribution of discrete gallium-doped zinc oxide particles.
Claim 2
Dependent Claim
64 words
In an electroluminescent lamp comprising a phosphor layer disposed between corresponding lamp electrodes that are adapted to apply an excitation potential to cause said phosphor layer to emit light, the front lamp electrode being light-transmissive to radiation from said phosphor layer, the improvement wherein, said front lamp electrode comprises a thin layer of light-transmissive binder containing a distribution of discrete gallium-doped zinc oxide particles.
Claim 3
Dependent Claim
19 words
The electroluminescent lamp of claim 1 wherein the average size of said particles is less than about 45 μm.
Claim 4
Dependent Claim
19 words
The electroluminescent lamp of claim 1 wherein the average size of said particles is between about 10μm and 20μm.
Claim 5
Dependent Claim
12 words
The electroluminescent lamp of claim 1 wherein said binder comprises polyvinylidene fluoride.
Claim 6
Dependent Claim
22 words
The electroluminescent lamp of claim 1 wherein the weight percentage of said particles in said binder is between about 85% and 95%.
Claim 7
Dependent Claim
93 words
In an electroluminescent lamp comprising a phosphor layer disposed between corresponding lamp electrodes that are adapted to apply an excitation potential to cause said phosphor layer to emit light, the front lamp electrode being light-transmissive to radiation from said phosphor layer, the improvement wherein said front lamp electrode comprises a thin layer of light-transmissive binder comprising polyvinylidene fluoride containing a distribution of discrete gallium-doped zinc oxide particles of average size between about 10 μm and 20 μm, the weight percentage of said particles present in said binder being between about 85% and 95%.
Claim 8
Dependent Claim
93 words
In an electroluminescent lamp comprising a phosphor layer disposed between corresponding lamp electrodes that are adapted to apply an excitation potential to cause said phosphor layer to emit light, the front lamp electrode being light-transmissive to radiation from said phosphor layer, the improvement wherein said front lamp electrode comprises a thin layer of light-transmissive binder comprising polyvinylidene fluoride containing a distribution of discrete gallium-doped zinc oxide particles of average size between about 10 μm and 20 μm, the weight percentage of said particles present in said binder being between about 85% and 95%.
Claim 9
Independent Claim
98 words
A method of forming a front electrode for an electroluminescent lamp comprising a phosphor-particle-containing layer disposed between said front electrode and a corresponding rear electrode that are adapted to apply an excitation potential to said phosphor particles, the front lamp electrode being light transmissive to radiation from said phosphor particles, said method comprising depositing over said phosphor layer at least one thin layer of a suspension of light-transmissive polymer solid dispersed in a liquid phase containing a uniform dispersion of discrete gallium-doped zinc oxide particles, and causing said layer to fuse throughout to form a continuous electrode layer.
Claim 10
Independent Claim
98 words
A method of forming a front electrode for an electroluminescent lamp comprising a phosphor-particle-containing layer disposed between said front electrode and a corresponding rear electrode that are adapted to apply an excitation potential to said phosphor particles, the front lamp electrode being light transmissive to radiation from said phosphor particles, said method comprising depositing over said phosphor layer at least one thin layer of a suspension of light-transmissive polymer solid dispersed in a liquid phase containing a uniform dispersion of discrete gallium-doped zinc oxide particles, and causing said layer to fuse throughout to form a continuous electrode layer.
Claim 11
Dependent Claim
12 words
The method of claim 7 wherein said light-transmissive polymer comprises polyvinylidene fluoride.
Claim 12
Independent Claim
105 words
A method of forming a front electrode for an electroluminescent lamp comprising a phosphor-particle-containing layer disposed between said front electrode and a corresponding rear electrode that are adapted to apply an excitation potential to said phosphor particles, the front lamp electrode being light transmissive to radiation from said phosphor particles, said method comprising depositing over said phosphor layer, by screen printing techniques, at least one thin layer of a suspension of light-transmissive polymer solid comprising polyvinylidene fluoride dispersed in a liquid phase containing a uniform dispersion of discrete gallium-doped zinc oxide particles, and causing said layer to fuse throughout to form a continuous electrode layer.
Claim 13
Independent Claim
105 words
A method of forming a front electrode for an electroluminescent lamp comprising a phosphor-particle-containing layer disposed between said front electrode and a corresponding rear electrode that are adapted to apply an excitation potential to said phosphor particles, the front lamp electrode being light transmissive to radiation from said phosphor particles, said method comprising depositing over said phosphor layer, by screen printing techniques, at least one thin layer of a suspension of light-transmissive polymer solid comprising polyvinylidene fluoride dispersed in a liquid phase containing a uniform dispersion of discrete gallium-doped zinc oxide particles, and causing said layer to fuse throughout to form a continuous electrode layer.
Claim 14
Dependent Claim
14 words
An electroluminescent lamp prepared according to the method of claim 7 or claim 9.
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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) | 1992-07-31 | 1993-01-30 | 1993-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-31 | 1997-01-30 | 1997-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-31 | 2001-01-30 | 2001-08-01 | $7700.00 | Window Closed / Lapsed |