Patent US3716742A successfully refreshed from Google Patents.
US3716742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display device utilization gas discharge
Assignee: Fujitsu Ltd
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Filing: 1971-03-02
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Granted: 1973-02-13
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Expires: 1991-03-02
Abstract
Abstract A pair of insulating substrates are positioned in spaced parallel relation having inside surfaces opposite each other with a gap filled with gas capable of ionization. A first group of electrodes are positioned on the inside surfaces of one of the substrates, and a second group of electrodes are positioned on the inside surfaces of the other of the substrates. The first group of electrodes are positioned in rows and the second group of electrodes are positioned in columns, and the first and second groups of electrodes are transversely positioned relative to each other. The surfaces of the first and second groups of electrodes are covered with dielectric layers, and each of the dielectric layers is covered with a protective layer to protect the surfaces inside the display device from sputtering. Each cross point of an electrode of the first group and an electrode of the second group is a discharge point for display.
Inventors
- 👤 N Nakayama
- 👤 M Osawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:34
CPC Classifications
H; H01; H01J; H01J11/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
217 words
A display device utilizing gas discharge, said display device comprising a pair of insulating substrates spaced from each other and in substantially parallel relation, each of said substrates having an inside surface facing that of the other and at least one of said substrates being transparent; a first group of electrodes positioned in rows on the inside surface of one of the substrates; a second group of electrodes positioned in columns on the inside surface of the other of the substrates, the first and second groups of electrodes being positioned transverse relative to each other; a first dielectric layer covering the first group of electrodes and a second dielectric layer covering the second group of electrodes; said first and second dielectric layers being of a material having heavy metallic elements therein; and a first protection layer formed on the first dielectric layer and a second protection layer formed on the second dielectric layer for preventing sputtering, said insulating substrates being positioned relative to each other in a manner whereby they are oppositely placed with a discharge gap between them, said discharge gap being filled with gas capable of ionization and each cross point of an electrode of the first group of electrodes and an electrode of the second group of electrodes being a discharge point for display.
Claim 2
Dependent Claim
217 words
A display device utilizing gas discharge, said display device comprising a pair of insulating substrates spaced from each other and in substantially parallel relation, each of said substrates having an inside surface facing that of the other and at least one of said substrates being transparent; a first group of electrodes positioned in rows on the inside surface of one of the substrates; a second group of electrodes positioned in columns on the inside surface of the other of the substrates, the first and second groups of electrodes being positioned transverse relative to each other; a first dielectric layer covering the first group of electrodes and a second dielectric layer covering the second group of electrodes; said first and second dielectric layers being of a material having heavy metallic elements therein; and a first protection layer formed on the first dielectric layer and a second protection layer formed on the second dielectric layer for preventing sputtering, said insulating substrates being positioned relative to each other in a manner whereby they are oppositely placed with a discharge gap between them, said discharge gap being filled with gas capable of ionization and each cross point of an electrode of the first group of electrodes and an electrode of the second group of electrodes being a discharge point for display.
Claim 3
Dependent Claim
17 words
A display device as claimed in claim 1, wherein each of the protection layers comprises silicon dioxide.
Claim 4
Dependent Claim
32 words
A display device as claimed in claim 1, wherein one of the substrates comprises alumina and a protection layer is formed only on the dielectric layer of the other of the substrates.
Claim 5
Dependent Claim
231 words
A display device utilizing gas discharge, said display device comprising a pair of insulating substrates spaced from each other and in substantially parallel relation, each of said substrates having an inside surface facing that of the other and at least one of said substrates being transparent; a first group of electrodes positioned in rows on the inside surface of one of the substrates; a second group of electrodes positioned in columns on the inside surface of the other of the substrates, the first and second groups of electrodes being positioned transverse relative to each other; a first dielectric layer covering the first group of electrodes and a second dielectric layer covering the second group of electrodes; a first protection layer formed on the first dielectric layer and a second protection layer formed on the second dielectric layer for preventing sputtering; and a first layer for increasing secondary electron emissivity formed on the first protection layer and a second layer for increasing secondary electron emissivity formed on the second protection layer, said insulating substrates being positioned relative to each other in a manner whereby they are oppositely placed with a discharge gap between them, said discharge gap being filled with gas capable of ionization and each cross point of an electrode of the first group of electrodes and an electrode of the second group of electrodes being a discharge point for display.
Claim 6
Dependent Claim
231 words
A display device utilizing gas discharge, said display device comprising a pair of insulating substrates spaced from each other and in substantially parallel relation, each of said substrates having an inside surface facing that of the other and at least one of said substrates being transparent; a first group of electrodes positioned in rows on the inside surface of one of the substrates; a second group of electrodes positioned in columns on the inside surface of the other of the substrates, the first and second groups of electrodes being positioned transverse relative to each other; a first dielectric layer covering the first group of electrodes and a second dielectric layer covering the second group of electrodes; a first protection layer formed on the first dielectric layer and a second protection layer formed on the second dielectric layer for preventing sputtering; and a first layer for increasing secondary electron emissivity formed on the first protection layer and a second layer for increasing secondary electron emissivity formed on the second protection layer, said insulating substrates being positioned relative to each other in a manner whereby they are oppositely placed with a discharge gap between them, said discharge gap being filled with gas capable of ionization and each cross point of an electrode of the first group of electrodes and an electrode of the second group of electrodes being a discharge point for display.
Claim 7
Dependent Claim
232 words
A display device utilizing gas discharge, said display device comprising a pair of insulating substrates spaced from each other and in substantially parallel relation, each of said substrates having an inside surface facing that of the other and at least one of said substrates being transparent; a first group of electrodes positioned in rows on the inside surface of one of the substrates; a second group of electrodes positioned in columns on the inside surface of the other of the substrates, the first and second groups of electrodes being positioned transverse relative to each other; a first dielectric layer covering the first group of electrodes and a second dielectric layer covering the second group of electrodes; a first protection layer formed on the first dielectric layer and a second protectiOn layer formed on the second dielectric layer for preventing sputtering; and a first denaturalized layer of cesium of high gamma emissivity formed by ion injection on the first protection layer and a second denaturalized layer of cesium of high gamma emissivity formed by ion injection on the second protection layer, said insulating substrates being positioned relative to each other in a manner whereby they are oppositely placed with a discharge gap between them, said discharge gap being filled with gas capable of ionization and each cross point of an electrode of the first group of electrodes being a discharge point for display.
Claim 8
Dependent Claim
232 words
A display device utilizing gas discharge, said display device comprising a pair of insulating substrates spaced from each other and in substantially parallel relation, each of said substrates having an inside surface facing that of the other and at least one of said substrates being transparent; a first group of electrodes positioned in rows on the inside surface of one of the substrates; a second group of electrodes positioned in columns on the inside surface of the other of the substrates, the first and second groups of electrodes being positioned transverse relative to each other; a first dielectric layer covering the first group of electrodes and a second dielectric layer covering the second group of electrodes; a first protection layer formed on the first dielectric layer and a second protectiOn layer formed on the second dielectric layer for preventing sputtering; and a first denaturalized layer of cesium of high gamma emissivity formed by ion injection on the first protection layer and a second denaturalized layer of cesium of high gamma emissivity formed by ion injection on the second protection layer, said insulating substrates being positioned relative to each other in a manner whereby they are oppositely placed with a discharge gap between them, said discharge gap being filled with gas capable of ionization and each cross point of an electrode of the first group of electrodes being a discharge point for display.
Claim 9
Dependent Claim
239 words
A display device utilizing gas discharge, said display device comprising a pair of insulating substrates spaced from each other and in substantially parallel relation, each of said substrates having an inside surface facing that of the other and at least one of said substrates being transparent; a first group of electrodes positioned in rows on the inside surface of one of the substrates; a second group of electrodes positioned in columns on the inside surface of the other of the substrates, the first and second groups of electrodes being positioned transverse relative to each other; a first dielectric layer covering the first group of electrodes and a second dielectric layer covering the second group of electrodes; a first protection layer formed on the first dielectric layer and a second protection layer formed on the second dielectric layer for preventing sputtering; said insulating substrates being positioned relative to each other in a manner whereby they are oppositely placed with a discharge gap between them, said discharge gap being filled with gas capable of ionization and each cross point of an electrode of the first group of electrodes being a discharge point for display; and a first metal layer of high emissivity formed on electrically isolated areas at the exact discharge points of the first protection layer and a second metal layer of high gamma emissivity formed on electrically isolated areas at the exact discharge points of the second protection layer.
Claim 10
Dependent Claim
239 words
A display device utilizing gas discharge, said display device comprising a pair of insulating substrates spaced from each other and in substantially parallel relation, each of said substrates having an inside surface facing that of the other and at least one of said substrates being transparent; a first group of electrodes positioned in rows on the inside surface of one of the substrates; a second group of electrodes positioned in columns on the inside surface of the other of the substrates, the first and second groups of electrodes being positioned transverse relative to each other; a first dielectric layer covering the first group of electrodes and a second dielectric layer covering the second group of electrodes; a first protection layer formed on the first dielectric layer and a second protection layer formed on the second dielectric layer for preventing sputtering; said insulating substrates being positioned relative to each other in a manner whereby they are oppositely placed with a discharge gap between them, said discharge gap being filled with gas capable of ionization and each cross point of an electrode of the first group of electrodes being a discharge point for display; and a first metal layer of high emissivity formed on electrically isolated areas at the exact discharge points of the first protection layer and a second metal layer of high gamma emissivity formed on electrically isolated areas at the exact discharge points of the second protection layer.
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) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |