US4843281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas plasma panel
Assignee: Norden Systems Inc
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Filing: 1986-10-17
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Granted: 1989-06-27
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Expires: 2006-10-17
Abstract
Abstract An improved gas plasma panel having an array of electrodes which define pixel points of light during gas ionization is disclosed wherein the wall charges generated at these pixel points during such ionization is concentrated about the pixel by the introduction of a dopant material onto the surface of the dielectric layer and in contact with the electron emissive layer.
Inventors
- 👤 Charles Mendelsohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:35
CPC Classifications
H; H01; H01J; H01J11/00; H01J11/10; H01J11/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
138 words
A plasma display device comprising: an ionizable gas disposed between two sidewalls of dielectric material, each sidewall having an inside surface closest to the ionizable gas, each inner surface having an array of electrodes disposed on the surface wherein the electrodes of one sidewall are positioned substantially perpendicular to the electrodes positioned on the other sidewall, thereby forming pixel points where they cross; said electrodes and substrates being coated with a second dielectric layer; said second dielectric layer coated with an electrically emissive material; wherein the improvement comprises an electrically conductive dopant material introduced into the second dielectric layer's surface adjacent to the emissive layer, said electrically conductive material being so configured about the electrode pixel point so as to concentrate the wall charge about said point and prevent said charge from spreading along the second dielectric's surface.
Claim 2
Dependent Claim
138 words
A plasma display device comprising: an ionizable gas disposed between two sidewalls of dielectric material, each sidewall having an inside surface closest to the ionizable gas, each inner surface having an array of electrodes disposed on the surface wherein the electrodes of one sidewall are positioned substantially perpendicular to the electrodes positioned on the other sidewall, thereby forming pixel points where they cross; said electrodes and substrates being coated with a second dielectric layer; said second dielectric layer coated with an electrically emissive material; wherein the improvement comprises an electrically conductive dopant material introduced into the second dielectric layer's surface adjacent to the emissive layer, said electrically conductive material being so configured about the electrode pixel point so as to concentrate the wall charge about said point and prevent said charge from spreading along the second dielectric's surface.
Claim 3
Dependent Claim
11 words
The article of claim 1 wherein the dopant is indium-tin oxide.
Claim 4
Dependent Claim
24 words
The article of claim 1 wherein the implanted material is configured as a circle, rectangle or square about the pixel point of the electrode.
Claim 5
Dependent Claim
22 words
The article of claim 1 wherein the dopant material has a bulk resistivity from about 300 to about 500 ohms per square.
Claim 6
Dependent Claim
19 words
The article of claim 3 wherein the implanted dopant acts as a reflective surface to increase the pixel brightness.
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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) | 1992-06-26 | 1992-12-26 | 1993-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-26 | 1996-12-26 | 1997-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-26 | 2000-12-26 | 2001-06-27 | $7700.00 | Window Closed / Lapsed |