US3818258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display device utilizing gas discharge
Assignee: Fujitsu Ltd
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Filing: 1972-12-14
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Granted: 1974-06-18
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Expires: 1992-12-14
Abstract
Abstract The present invention relates to a plasma display panel comprising two substrates defining a gap in which an ionizable gas is disposed. On at least one of the substrates there are a plurality of electrodes disposed on the side thereof closer to said gap. Covering said electrodes are dielectric means which contact said gap. The dielectric means comprises a first portion having a high secondary electron emissivity and a second portion having a secondary electron emissivity lower than said first portion. The plasma display panel according to the present invention can be used to improve the definition of a displayed pattern in the plasma display panel, or as a self shift plasma display panel, and or as a pattern generator in an information processing system.
Inventors
- 👤 Y Shirouchi
- 👤 T Urade
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:33
CPC Classifications
H; H01; H01J; H01J11/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
108 words
A display device utilizing gas discharge which is composed of: a. a pair of substrates which are facing each other so as to define a discharge gap which is filled with a gas capable of ionization, b. a plurality of electrodes which are disposed on at least one of said substrates on the side thereof closer to said gap, and c. dielectric means covering said electrodes and contacting said discharge gap, said dielectric means comprising a first portion which has a high secondary electron emissivity in accordance with a predetermined configuration and a second portion which has a secondary electron emissivity lower than that of said first portion.
Claim 2
Dependent Claim
108 words
A display device utilizing gas discharge which is composed of: a. a pair of substrates which are facing each other so as to define a discharge gap which is filled with a gas capable of ionization, b. a plurality of electrodes which are disposed on at least one of said substrates on the side thereof closer to said gap, and c. dielectric means covering said electrodes and contacting said discharge gap, said dielectric means comprising a first portion which has a high secondary electron emissivity in accordance with a predetermined configuration and a second portion which has a secondary electron emissivity lower than that of said first portion.
Claim 3
Dependent Claim
49 words
A display device according to claim 1 wherein said plurality of electrodes are disposed in parallel, wherein said second dielectric portion comprises a layer covering said electrodes, and wherein said first dielectric portion comprises a plurality of strips disposed in contact with said dielectric layer and facing said gap.
Claim 4
Dependent Claim
31 words
The display device according to claim 2 with the addition of means for applying a polyphase voltage to said electrodes thereby shifting discharge spots generated between adjacent electrodes along said strips.
Claim 5
Dependent Claim
147 words
The display device according to claim 1 wherein said plurality of electrodes includes a first and second set of electrodes arranged at right angles to each other and are respectively covered by said dielectric means, said sets being positioned in spaced parallel relation facing one another with said discharge gap therebetween, the first portions of said dielectric means comprising a plurality of parallel dielectric strips having a higher secondary electron emissivity than that of said dielectric means, said strips corresponding to said first set of electrodes and means for applying a polyphase voltage to said second set of electrodes, said voltage applying means being connected to said second set of electrodes and being disposed at right angles to said strips, said applying means producing discharge spots at cross points between said first and second set of electrodes which are shifted along said strips by said applied voltage.
Claim 6
Dependent Claim
86 words
The display device according to claim 1 wherein said plurality of electrodes includes first and second sets of electrodes arranged at right angles to one another, wherein said dielectric means comprises first and second dielectric layers respectively covering said first and second sets of electrodes, said dielectric layers being positioned and spaced in parallel relation with their surfaces facing each other across said discharge gap, wherein the respective second portions of said layers comprise a plurality of dielectric strips arranged at right angles to one another.
Claim 7
Dependent Claim
78 words
A display device according to claim 1 wherein said plurality of electrodes includes first and second sets of electrodes arranged at right angles to one another and wherein said dielectric means includes first and second dielectric layers respectively covering said first and second sets, said dielectric layers being positioned and spaced in parallel relation on each side of said discharge gap, wherein the first portions of said two dielectric layers comprise first and second pluralities of dielectric strips.
Claim 8
Dependent Claim
81 words
The gas discharge device according to claim 1 wherein said plurality of electrodes comprises first and second sets of electrodes, wherein said dielectric means comprises first and second dielectric layers covering said first and second electrodes, said dielectric layers being spaced from one another with said discharge gap between, the first portion of at least one of said layers being covered with a predetermined configuration of a dielectric material having a higher secondary electron emissivity than that of said dielectric layer.
Claim 9
Dependent Claim
80 words
The gas discharge device according to claim 1 wherein said plurality of electrodes comprises two sets of electrodes, wherein said dielectric means comprises two dielectric layers respectively covering said sets of electrodes, said dielectric layers being spaced from one another with said discharge gap between them, and wherein the second portion of at least one of the said layers is covered with a pattern of dielectric material having lower secondary electron emissivity than that of said one of said layers.
References Cited (Backward Citations)
US3614511A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |