US3629654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removable electrode display device
Assignee: NCR Voyix Corp
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Filing: 1969-11-28
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Granted: 1971-12-21
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Expires: 1989-11-28
Abstract
Abstract An electroluminescent display device formed by superimposing a first substrate upon a second substrate, forming a cell between the surfaces of the two substrates. A common transparent electrode is deposited on the outside surface of one of the two substrates overlying the entire cell formed by the superimposed substrates. A conductive pattern electrode, having a desired configuration, is placed in intimate contact (e.g., pressure contact) against the outside surface of the other substrate. Information is displayed by applying an alternating voltage of sufficient magnitude and frequency between the two electrodes, resulting in the ignition of an excitable gas contained within the formed cell, the illumination produced corresponding to the configuration of the conductive pattern electrode. The conductive pattern electrode is removable, since it is retained against the outside surface of the cell only by a pressure contact; therefore, the type of information to be displayed can be easily varied simply by removing the conductive pattern electrode and placing another in its place. The various designs of removable electrode patterns which can be employed are endless and can encompass Arabic numerals, alphabetic characters, and other designs.
Inventors
- 👤 John L Janning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:49
CPC Classifications
H; H01; H01J; H01J11/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
130 words
A low-cost gaseous electroluminescent device comprising: first and second transparent elements, each having an inside surface and an outside surface, with said inside surfaces facing each other and being spaced apart a distance of approximately 0.010 inch; means for hermetically sealing said elements to form a chamber therebetween; an ionizable gas filling said chamber; a continuous coating of transparent, electrically conductive material contacting the outside surface of the first element to form a coating electrode thereon; a movable character electrode means; means for positioning said character electrode means to contact the outside surface of said second element; and a source of AC potential connected to said character electrode means and said coating electrode to ionize said gas to produce an illumination conforming to the shape of the character electrode means.
Claim 2
Dependent Claim
130 words
A low-cost gaseous electroluminescent device comprising: first and second transparent elements, each having an inside surface and an outside surface, with said inside surfaces facing each other and being spaced apart a distance of approximately 0.010 inch; means for hermetically sealing said elements to form a chamber therebetween; an ionizable gas filling said chamber; a continuous coating of transparent, electrically conductive material contacting the outside surface of the first element to form a coating electrode thereon; a movable character electrode means; means for positioning said character electrode means to contact the outside surface of said second element; and a source of AC potential connected to said character electrode means and said coating electrode to ionize said gas to produce an illumination conforming to the shape of the character electrode means.
Claim 3
Dependent Claim
123 words
The device as claimed in claim 1 in which said means for positioning said character electrode means comprises: a disc made of electrically insulating material and rotatably mounted on a shaft; and drive means for rotating said disc; said character electrode means comprising: conductor character elements located on one face of said disc and means for connecting said elements to said source of AC potential; said disc being positioned relative to the outside surface of the second transparent element so that a selected character element on said disc will be moved by said drive means to contact said outside surface of the second transparent element and thereby ionize said gas to produce an illumination conforming to the shape of the selected character element.
Claim 4
Dependent Claim
97 words
The device as claimed in claim 1 in which said movable character electrode means comprises: a flat planar insulating card having character-forming electrodes on one face thereof, with said electrodes being connected to said source of AC potential; said means for positioning said character electrode means being holding means (like springs) for holding said card with the face having said character-forming electrodes thereon against the outside surface of the second transparent element to ionize the gas to produce an illumination conforming to the shape of the character-forming electrodes which are connected to the source of AC potential.
Claim 5
Dependent Claim
113 words
The device as claimed in claim 1 in which said first and second transparent elements are first and second tubes with each tube having one closed end and one open end, said second tube being smaller in diameter than the first tube and placed within the first tube in concentric relationship therewith, with said open ends being aligned and sealed together to form said chamber, with the inside surface of the first tube and the outside surface of the second tube forming the inside surfaces of said chamber; said movable character electrode means being positioned inside said second tube with said electrode meanS in contact with the inside surface of the second tube.
Claim 6
Dependent Claim
68 words
The device as claimed in claim 1 in which said first and second transparent elements are made of glass having a wall thickness of approximately 0.030 inch; said gas being composed of more than 99 percent neon and less than 1 percent of nitrogen and argon; said source of AC potential being approximately 450 volts having pulses of two microseconds'' duration with fifteen microseconds'' duration between successive pulses.
References Cited (Backward Citations)
US2004577A
Cited
US3497751A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |