Patent US4458775A successfully refreshed from Google Patents.
Patent US4015166A successfully refreshed from Google Patents.
US4015166A
Expired / Lapsed
US
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X-Y matrix type electroluminescent display panel
Assignee: Panasonic Holdings Corp
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Filing: 1976-05-04
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Granted: 1977-03-29
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Expires: 1996-05-04
Abstract
Abstract This invention relates to an X-Y matrix type electroluminescent display panel. The panel includes a transparent insulating substrate, transparent and parallel X-electrodes of strip shape provided on said transparent insulating substrate, a D.C. electroluminescent layer provided on said transparent parallel electrodes; parallel Y-electrodes of strip shape provided on said D.C. electroluminescent layer, the direction of said Y-electrodes being perpendicular to that of said X-electrodes, said X- and Y-electrodes and said D.C. electroluminescent layer defining display elements at the intersections of said X- and Y-electrodes; and a mesh-shaped insulating layer, preferably of black color, for insulating said display elements from each other at least in the vicinity of said X-electrodes. Because of the mesh-shaped insulating layer, it becomes possible to achieve uniform "forming" of said D.C. electroluminescent layer and to improve the brightness and contrast of the resultant display panel.
Inventors
- 👤 Nobumasa Ohshima
- 👤 Hiroshi Kawarada
- 👤 Shinichi Noma
- 👤 Toshio Tatsumichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:35
CPC Classifications
G; G09; G09F; G09F13/00; G09F13/20; G09F13/22; H; H05; H05B; H05B33/00; H05B33/12; H05B33/22
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
127 words
An X-Y matrix type electroluminescent display panel comprising: a transparent insulating substrate; flat transparent and parallel strip-shaped X-electrodes on said transparent insulating substrate; a formed D.C. electroluminescent layer on said flat transparent parallel electrodes; parallel strip-shaped Y-electrodes on said D.C. electroluminescent layer, the direction of said Y-electrodes being perpendicular to that of said X-electrodes, said X- and Y-electrodes and said D.C. electroluminescent layer defining display elements at the crossing points of said X- and Y-electrodes; and a mesh-shaped insulating layer within said D.C. electroluminescent layer and mounted on said X-electrodes and extending at least part way through the thickness of said D.C. electroluminescent layer for insulating said display elements from each other at least in the vicinity of said X-electrodes, said insulating layer being a photo-resist material.
Claim 2
Dependent Claim
127 words
An X-Y matrix type electroluminescent display panel comprising: a transparent insulating substrate; flat transparent and parallel strip-shaped X-electrodes on said transparent insulating substrate; a formed D.C. electroluminescent layer on said flat transparent parallel electrodes; parallel strip-shaped Y-electrodes on said D.C. electroluminescent layer, the direction of said Y-electrodes being perpendicular to that of said X-electrodes, said X- and Y-electrodes and said D.C. electroluminescent layer defining display elements at the crossing points of said X- and Y-electrodes; and a mesh-shaped insulating layer within said D.C. electroluminescent layer and mounted on said X-electrodes and extending at least part way through the thickness of said D.C. electroluminescent layer for insulating said display elements from each other at least in the vicinity of said X-electrodes, said insulating layer being a photo-resist material.
Claim 3
Dependent Claim
49 words
An X-Y matrix type electroluminescent display panel according to claim 1 wherein the thickness of said mesh-shaped insulating layer and said electroluminescent layer are in the relation: 0.03≦d.sub.1 /d.sub.2 ≦1 where d 1 and d 2 represent the thicknesses of said mesh-shaped insulating layer and said electroluminescent layer, respectively.
Claim 4
Dependent Claim
25 words
An X-Y matrix type electroluminescent display panel according to claim 1 wherein said mesh-shaped insulating layer insulates said display elements from each other substantially completely.
Claim 5
Dependent Claim
24 words
An X-Y matrix type electroluminescent display panel according to claim 1 wherein the color of said mesh-shaped insulating layer is a light absorbing color.
Claim 6
Dependent Claim
17 words
An X-Y matrix type electroluminescent display panel according to claim 4 wherein said photo-resist material is black.
Claim 7
Dependent Claim
34 words
An X-Y matrix type electroluminescent display panel according to claim 1, wherein said D.C. electroluminescent material comprises an Mn activated ZnS powder having a Cu or copper sulfide conductive layer on each particle thereof.
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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) | 1980-03-28 | 1980-09-27 | 1981-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-28 | 1984-09-27 | 1985-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-28 | 1988-09-27 | 1989-03-29 | $7700.00 | Window Closed / Lapsed |