US4128787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
DC Pop with varistor connected between control circuit and cathode
Assignee: LXD Inc
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Filing: 1978-04-10
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Granted: 1978-12-05
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Expires: 1998-04-10
Abstract
Abstract Gas discharge displays of the planar electrode type and having a plurality of anode or cathode electrodes connected together on a common matrix address line utilize resistive elements, having a current-voltage characteristic varying in highly exponential manner, in series between the commmon matrix line and each of the paralleled cathode or anode electrodes to facilitate current sharing therebetween during normal operation while allowing "run-in" of the displays at relatively greater than normal currents.
Inventors
- 👤 John E. Bigelow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:13
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/48; H01J17/49; H01J17/492
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
82 words
A gas discharge display comprising: a first planar electrode structure; a multiplicity of electrodes fabricated independent of one another in a plane substantially parallel to, and spaced from, said planar electrode structure; a gas filling the volume between said planar electrode structure and said plurality of electrodes; a conductive lead to be coupld to a plurality of the multiplicity of electrodes; and a non-linear electrical resistance element in electrical series connection between each of said plurality of electrodes and said conductive lead.
Claim 2
Dependent Claim
82 words
A gas discharge display comprising: a first planar electrode structure; a multiplicity of electrodes fabricated independent of one another in a plane substantially parallel to, and spaced from, said planar electrode structure; a gas filling the volume between said planar electrode structure and said plurality of electrodes; a conductive lead to be coupld to a plurality of the multiplicity of electrodes; and a non-linear electrical resistance element in electrical series connection between each of said plurality of electrodes and said conductive lead.
Claim 3
Dependent Claim
21 words
The gas discharge display as set forth in claim 1, wherein the non-linear resistance element is fabricated of a varistor material.
Claim 4
Dependent Claim
26 words
The gas discharge display as set forth in claim 2, wherein the varistor material is selected from the group consisting of zinc-oxide and vanadium-oxide varistor materials.
Claim 5
Dependent Claim
26 words
The gas discharge display as set forth in claim 2, wherein said non-linear resistance element is a matrix of varistor material having conductive material suspended therein.
Claim 6
Dependent Claim
84 words
The gas discharge display as set forth in claim 1, further comprising a linear resistance element in electrical parallel connection across said non-linear resistance element, the parallel combination having a current-voltage characteristic providing a finite value of resistance between each of said plurality of electrodes and said conductive lead for a first flow of current to each of said plurality of electrodes and a second resistance, greater than said resistance, for a second magnitude of current flow greater than said first current flow magnitude.
References Cited (Backward Citations)
US3855500A
Cited
US3811071A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-04 | 1982-06-05 | 1982-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-04 | 1986-06-05 | 1986-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-04 | 1990-06-05 | 1990-12-05 | $7700.00 | Window Closed / Lapsed |