US4393326A
Expired / Lapsed
US
⏱️ 0.0 years remaining
DC Plasma display panel
Assignee: Okaya Electric Industry Co Ltd
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Filing: 1981-02-20
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Granted: 1983-07-12
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Expires: 2001-02-20
Abstract
Abstract A plasma display panel with an electrode composed of a metal layer (e.g., Fe and Ni) and a metal compound layer (e.g., alkaline earth metal oxide or sulfide, and rare earth metal hexaborides) which are formed by means of plasma spray coating. The plasma spray coating should be done at such a temperature that the metal or metal compound is in the molten state.
Inventors
- 👤 Takeo Kamegaya
- 👤 Satoshi Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:10
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/48; H01J17/49
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
79 words
A DC plasma display panel comprising first and second substrates defining a gas chamber therebetween; an ionizable gaseous medium within said chamber; an anode layer formed onto said first substrate; a cathode layer formed onto said second substrate; an emitter layer formed onto said cathode layer; said cathode layer, said emitter layer, and said anode layer being disposed within said chamber for ionizing said gaseous medium; said emitter layer being formed onto said cathode layer by plasma spray coating.
Claim 2
Dependent Claim
79 words
A DC plasma display panel comprising first and second substrates defining a gas chamber therebetween; an ionizable gaseous medium within said chamber; an anode layer formed onto said first substrate; a cathode layer formed onto said second substrate; an emitter layer formed onto said cathode layer; said cathode layer, said emitter layer, and said anode layer being disposed within said chamber for ionizing said gaseous medium; said emitter layer being formed onto said cathode layer by plasma spray coating.
Claim 3
Dependent Claim
29 words
The plasma display panel of claim 11 wherein said cathode layer is made from a metal selected from the group consisting of Fe, Ni, W, Cu, Cr and Al.
Claim 4
Dependent Claim
17 words
The plasma display panel of claim 11 wherein said cathode layer is made from a metal alloy.
Claim 5
Dependent Claim
22 words
The plasma display panel of any of claims 1, 2 or 3 wherein said cathode layer is formed by plasma spray coating.
Claim 6
Dependent Claim
43 words
The plasma display panel of any of claims 1, 2 or 3 wherein said emitter is made from a compound selected from the group consisting of alkaline earth metal oxides, alkaline earth metal sulfides, aluminum composite metal oxides, and rare earth metal hexaborides.
Claim 7
Dependent Claim
25 words
The plasma display panel of any of claims 1, 2 or 3 wherein said emitter has a thickness in the range of 1 to 50μ.
Claim 8
Dependent Claim
26 words
The plasma display panel of claim 5 wherein said plasma spray coating is performed at a temperature sufficiently high to melt the material of said emitter.
Claim 9
Dependent Claim
41 words
The DC plasma display panel of claim 1, wherein said emitter layer comprises a plurality of discrete emitters and said anode layer comprises a plurality of discrete anodes, said emitters and said anodes defining a plurality of gas discharge cells therebetween.
Claim 10
Dependent Claim
21 words
The DC plasma display panel of claim 1, wherein said cathode layer is in the form of at least one strip.
Claim 11
Dependent Claim
23 words
The DC plasma display panel of claim 9, wherein said emitters are formed as a plurality of disc-shaped regions onto said cathode layer.
Claim 12
Dependent Claim
30 words
The DC plasma display panel of claim 10, wherein said cathode layer has a plurality of substantially circular apertures formed therein and wherein said emitters are provided within said apertures.
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) | 1986-07-11 | 1987-01-10 | 1987-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-11 | 1991-01-10 | 1991-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-11 | 1995-01-10 | 1995-07-12 | $7700.00 | Window Closed / Lapsed |