US3740616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically luminescent device
Assignee: Panasonic Holdings Corp
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Filing: 1970-01-02
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Granted: 1973-06-19
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Expires: 1990-01-02
Abstract
Abstract An electrically luminescent device having an electroluminescent element and associated power supply electrodes, at least one of the electrodes being in the form of a gapped structure consisting of fine metal wires which are arranged in parallel with each other or in a reticulate fashion. In the device, mere coating or placement of a low-resistance substance such as water, an alcohol, a conductive paint or an evaporated metal film on the gap portion of the gapped electrode in such a manner as to conform with the shape of a character or pattern to be displayed can easily attain the luminous display of the character or pattern.
Inventors
- 👤 T Kohashi
- 👤 N Suzuki
- 👤 Y Takiguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:23
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/26; H05B33/02; H05B33/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
169 words
An electrically luminescent display device comprising two electrically luminescent films having different luminescent colors and disposed adjacent to each other, first and second dielectric layers respectively disposed on the opposite outer surfaces of the combination of said electrically luminescent films, said second dielectric layer being light-permeable, a first electrode disposed on the outer surface of said first dielectric layer, a second electrode disposed on the outer surface of said second dielectric layer, a third electrode disposed between said two electrically luminescent films, said first and third electrodes being formed by a plurality of fine wires in a grid-like configuration, means for applying a first voltage between said first and third electrodes, means for applying a second voltage between said second and third electrodes, and means for producing a pattern of visual color light emissions from said electrically luminescent films comprising a low-resistance material applied to preselected portions on said outer surface of said first dielectric layer, said low-resistance material beIng in electrical contact with adjacent portions of said electrode.
Claim 2
Dependent Claim
169 words
An electrically luminescent display device comprising two electrically luminescent films having different luminescent colors and disposed adjacent to each other, first and second dielectric layers respectively disposed on the opposite outer surfaces of the combination of said electrically luminescent films, said second dielectric layer being light-permeable, a first electrode disposed on the outer surface of said first dielectric layer, a second electrode disposed on the outer surface of said second dielectric layer, a third electrode disposed between said two electrically luminescent films, said first and third electrodes being formed by a plurality of fine wires in a grid-like configuration, means for applying a first voltage between said first and third electrodes, means for applying a second voltage between said second and third electrodes, and means for producing a pattern of visual color light emissions from said electrically luminescent films comprising a low-resistance material applied to preselected portions on said outer surface of said first dielectric layer, said low-resistance material beIng in electrical contact with adjacent portions of said electrode.
Claim 3
Dependent Claim
34 words
An electrically luminescent display device according to claim 1, further comprising a third dielectric layer, separate from said first dielectric layer, disposed between said first dielectric layer and said combination of electrically luminescent films.
Claim 4
Dependent Claim
133 words
An electrically luminescent display device, comprising: a first dielectric layer; an electrically luminescent film comprising first, second and third layers disposed within said first dielectric layer and spaced apart from each other by said first dielectric layer; a first electrode having a grid-like configuration, wherein said first, second and third electrically luminescent layers are disposed within the gaps in said first grid-like electrode; second and third dielectric layers disposed on opposite sides of said electrically luminescent film; second and third electrodes disposed on the outer surfaces of said second and third dielectric layers, respectively, and spaced from said electrically luminescent film by said respective second and third dielectric layers; and means applying a first voltage between said first and second electrodes and means applying a second voltage between said first and third electrodes.
Claim 5
Dependent Claim
133 words
An electrically luminescent display device, comprising: a first dielectric layer; an electrically luminescent film comprising first, second and third layers disposed within said first dielectric layer and spaced apart from each other by said first dielectric layer; a first electrode having a grid-like configuration, wherein said first, second and third electrically luminescent layers are disposed within the gaps in said first grid-like electrode; second and third dielectric layers disposed on opposite sides of said electrically luminescent film; second and third electrodes disposed on the outer surfaces of said second and third dielectric layers, respectively, and spaced from said electrically luminescent film by said respective second and third dielectric layers; and means applying a first voltage between said first and second electrodes and means applying a second voltage between said first and third electrodes.
Claim 6
Dependent Claim
32 words
An electrically luminescent display device according to claim 3, further comprising a fourth dielectric layer, distinct from said third dielectric layer, disposed between said third dielectric layer and said electrically luminescent film.
Claim 7
Dependent Claim
23 words
An electrically luminescent display device according to claim 3, wherein said first, second and third electrically luminescent layers have different luminescent spectrum bands.
Claim 8
Dependent Claim
97 words
An electrically luminescent display device, comprising: an electrically luminescent film; first and second second planer electrodes disposed on opposite sides of said electrically luminescent film, at least one of said electrodes being formed of a plurality of wires in a grid-like configuration; a dielectric layer disposed between said grid-like electrode and said electrically luminescent film; and a conductive substance having a resistivity lower than that of said phosphor layer and placed on said dielectric layer in the shape of characteristics or patterns to be displayed, the gridlike electrode serving as a feeder wire for said conductive substance.
Claim 9
Dependent Claim
97 words
An electrically luminescent display device, comprising: an electrically luminescent film; first and second second planer electrodes disposed on opposite sides of said electrically luminescent film, at least one of said electrodes being formed of a plurality of wires in a grid-like configuration; a dielectric layer disposed between said grid-like electrode and said electrically luminescent film; and a conductive substance having a resistivity lower than that of said phosphor layer and placed on said dielectric layer in the shape of characteristics or patterns to be displayed, the gridlike electrode serving as a feeder wire for said conductive substance.
Claim 10
Dependent Claim
34 words
An electrically luminescent display device according to claim 6, further comprising: a second dielectric layer, separate from the first-mentioned dielectric layer, disposed between and adjacent said first-mentioned dielectric layer and said electrically luminescent film.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |