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US3753231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroluminescent devices
Assignee: SECR DEFENCE
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Filing: 1971-10-04
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Granted: 1973-08-14
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Expires: 1991-10-04
Abstract
Abstract An electroluminescent device includes a first plurality of conductors, a second plurality of conductors forming a plurality of pairs of intersections with the first plurality of conductors, each pair of intersections having associated with it a combination of a region of electroluminescent material connected in electrical series with a solid state memory switch, the said combination being connected between a first conductor and a second conductor, and an electrical connection from the said combination to a third conductor, means for applying a voltage to which the region of electroluminescent material is responsive between the first conductor and the second conductor and means for applying electrical pulses between the first conductor and the second conductor having sufficient magnitude to switch the solid state memory switch between its conducting state and its impeding state. The said electrical connection may contain a solid state threshold switch or an electrical capacitor. The members of the first plurality of conductors may all be parallel and the members of the second plurality of conductors may all be parallel and the first plurality of conductors may be perpendicular to the second plurality of conductors.
Inventors
- 👤 C Hilsum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:13
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/22; G09G3/30; H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; H05B44/00; G09G2300/00; G09G2300/08; G09G2300/0809; G09G2300/0842; G09G2300/088; G09G2300/0885; Y; Y02; Y02B; Y02B20/00; Y02B20/30
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
389 words
An electroluminescent display device operable using unidirectional operating voltages and comprising a first plurality of control conductors, a second plurality of control conductors forming a plurality of intersections with the first plurality of control conductors, each of said intersections being associated with an electrical combination consisting of a region of electroluminescent phosphor material of the kind providing light emission in response to an applied unidirectional operating voltage and electrically connected to an electrically reversible solid state memory switch of the kind having a conducting state and an impeding state and requiring substantially no electrical holding current to hold said solid state memory switch in its conducting state, said electrical combinations being connected to said conductors with the region of electroluminescent phosphor material belonging to each of said intersections being electrically connected to one of said first plurality of control conductors and the solid state memory switch belonging to each of said intersections being electrically connected to one of said second plurality of control conductors, a third plurality of control conductors, a plurality of electrical connections disposed respectively between one of said third plurality of control conductors and the junction between each region of electroluminescent phosphor material and its associated solid state memory switch, first pulse means for applying between at least one of said second plurality of control conductors and at least one of another of said pluralities of control conductors a first electrical pulse capable of switching the solid state memory switch belonging to at least one selected intersection from its impeding state to its conducting state, means for applying between at least one of said first plurality of control conductors and said at least one of said second plurality of control conductors a unidirectional operating voltage while said solid state memory switch belonging to said at least one intersection is in its conducting state, said unidirectional operating voltage being operative to produce emission of light from the region of electroluminescent phosphor material belonging to said at least one intersection, and second pulse means for applying between said at least one of said second plurality of control conductors and at least one of another of said pluralities of control conductors a second electrical pulse operative to switch the solid state memory switch belonging to said at least one selected intersection from its conducting state into its impeding state.
Claim 2
Dependent Claim
389 words
An electroluminescent display device operable using unidirectional operating voltages and comprising a first plurality of control conductors, a second plurality of control conductors forming a plurality of intersections with the first plurality of control conductors, each of said intersections being associated with an electrical combination consisting of a region of electroluminescent phosphor material of the kind providing light emission in response to an applied unidirectional operating voltage and electrically connected to an electrically reversible solid state memory switch of the kind having a conducting state and an impeding state and requiring substantially no electrical holding current to hold said solid state memory switch in its conducting state, said electrical combinations being connected to said conductors with the region of electroluminescent phosphor material belonging to each of said intersections being electrically connected to one of said first plurality of control conductors and the solid state memory switch belonging to each of said intersections being electrically connected to one of said second plurality of control conductors, a third plurality of control conductors, a plurality of electrical connections disposed respectively between one of said third plurality of control conductors and the junction between each region of electroluminescent phosphor material and its associated solid state memory switch, first pulse means for applying between at least one of said second plurality of control conductors and at least one of another of said pluralities of control conductors a first electrical pulse capable of switching the solid state memory switch belonging to at least one selected intersection from its impeding state to its conducting state, means for applying between at least one of said first plurality of control conductors and said at least one of said second plurality of control conductors a unidirectional operating voltage while said solid state memory switch belonging to said at least one intersection is in its conducting state, said unidirectional operating voltage being operative to produce emission of light from the region of electroluminescent phosphor material belonging to said at least one intersection, and second pulse means for applying between said at least one of said second plurality of control conductors and at least one of another of said pluralities of control conductors a second electrical pulse operative to switch the solid state memory switch belonging to said at least one selected intersection from its conducting state into its impeding state.
Claim 3
Dependent Claim
18 words
An electroluminescent display device as claimed in claim 1 wherein said electrical combinations are arranged in a matrix.
Claim 4
Dependent Claim
32 words
An electroluminescent display device as claimed in claim 2 wherein said first plurality, said second plurality, and said third plurality of control conductors form an integrated display panel structure with said matrix.
Claim 5
Dependent Claim
44 words
An electroluminescent device as claimed in claim 3 and wherein said first plurality of control conductors are parallel with one another, sAid second plurality of control conductors being parallel with one another, and said third plurality of control conductors being parallel with one another.
Claim 6
Dependent Claim
42 words
An electroluminescent display device as claimed in claim 4 and wherein said second plurality of control conductors is parallel with said third plurality of control conductors, and said first plurality of control conductors is perpendicular to said third plurality of control conductors.
Claim 7
Dependent Claim
44 words
An electroluminescent display device as claimed in claim 1 wherein said first pulse means is arranged to apply said first electrical pulse between at least one of said second plurality of control conductors and at least one of said third plurality of control conductors.
Claim 8
Dependent Claim
43 words
An electroluminescent device as claimed in claim 6 wherein said second pulse means is arranged to apply said second electrical pulse between at least one of said second plurality of control conductors and at least one of said third plurality of control conductors.
Claim 9
Dependent Claim
43 words
An electroluminescent device as claimed in claim 6 wherein said second pulse means is arranged to apply said second electrical pulse between at least one of said second plurality of control conductors and at least one of said first plurality of control conductors.
Claim 10
Dependent Claim
62 words
An electroluminescent device as claimed in claim 5 wherein said plurality of electrical connections form part of said integrated display panel structure, each of said electrical connections containing an electrically reversible solid state threshold switch of the type having a conducting state and an impeding state and requiring an electrical current to hold said solid state threshold switch in its conducting state.
Claim 11
Dependent Claim
32 words
An electroluminescent display device as claimed in claim 5 wherein said plurality of electrical connections form part of said integrated display panel structure, each of said electrical connections containing an electrical capacitor.
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |