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Patent US4037130A successfully refreshed from Google Patents.
US4037130A
Expired / Lapsed
US
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Gas discharge display device
Assignee: NEC Corp
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Filing: 1975-05-20
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Granted: 1977-07-19
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Expires: 1995-05-20
Abstract
Abstract A gas discharge display device includes a center plate which comprises cells for defining a display area. The center plate, which is sandwiched between two electrode holding plates each of which has an electrode coated with a dielectric layer, is in the form of a porous insulating layer having a low dielectric constant.
Inventors
- 👤 Takao Mimitsuka
- 👤 Tunekiyo Iwakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:46
CPC Classifications
H; H01; H01J; H01J11/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
168 words
A gas discharge display device comprising: a pair of insulating plates spaced from each other in substantially parallel relation, each of said plates having an inside surface facing that of the other plate and at least one of said plates being transparent; a first group of at least one electrode disposed on the inside surface of one of said insulating plates, a second group of at least one electrode disposed on the inside surface of the other of said insulating plates, said first and second groups of electrodes being disposed traverse to each other to form a uniform discharge gap; a first dielectric layer covering said first group of electrodes and a second dielectric layer covering said second group of electrodes; a thin flat member disposed between said insulating plates to give said substantially parallel relation therebetween, said member being made entirely of a porous dielectric material and having an aperture of a shape substantially identical to said discharge gap; and an ionizable gas filling said discharge gap.
Claim 2
Dependent Claim
168 words
A gas discharge display device comprising: a pair of insulating plates spaced from each other in substantially parallel relation, each of said plates having an inside surface facing that of the other plate and at least one of said plates being transparent; a first group of at least one electrode disposed on the inside surface of one of said insulating plates, a second group of at least one electrode disposed on the inside surface of the other of said insulating plates, said first and second groups of electrodes being disposed traverse to each other to form a uniform discharge gap; a first dielectric layer covering said first group of electrodes and a second dielectric layer covering said second group of electrodes; a thin flat member disposed between said insulating plates to give said substantially parallel relation therebetween, said member being made entirely of a porous dielectric material and having an aperture of a shape substantially identical to said discharge gap; and an ionizable gas filling said discharge gap.
Claim 3
Dependent Claim
26 words
A gas discharge display device as claimed in claim 1, wherein said porous material contains a mixture of powdered metal oxide and low melting point glass.
Claim 4
Dependent Claim
19 words
A gas discharge display device as claimed in claim 2, wherein said material further contains a black metal oxide.
Claim 5
Dependent Claim
33 words
A gas discharge display device as claimed in claim 1, wherein said thin flat member is formed through the screen printing of said porous material on at least one of said dielectric layers.
Claim 6
Dependent Claim
24 words
A gas discharge display device as claimed in claim 2, in which said powered metal oxide is one of aluminum oxide and manganese oxide.
References Cited (Backward Citations)
US3961218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-18 | 1981-01-17 | 1981-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-18 | 1985-01-17 | 1985-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-18 | 1989-01-17 | 1989-07-19 | $7700.00 | Window Closed / Lapsed |