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US5644327A
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Tessellated electroluminescent display having a multilayer ceramic substrate
Assignee: Transpacific Infinity LLC
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Filing: 1995-06-07
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Granted: 1997-07-01
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Expires: 2015-06-07
Abstract
Abstract An electroluminescent display formed on a ceramic substrate having a front ceramic surface and a back ceramic surface. The ceramic substrate includes a metal core that provides structural support, electrical ground, and heat dissipation. Electroluminescent cells are mounted on the front ceramic surface and driver circuits for driving the of electroluminescent cells are mounted on the back ceramic surface. The driver circuits are positioned directly behind said electroluminescent cells. Connectors extend through said ceramic substrate and the electroluminescent cells to different driver circuits. By positioning the driver circuits close to the EL cells, the drive lines from the drivers to the EL cells are short which allows for high refresh rates and low resistance losses. Each of the driver circuits can drive one electroluminescent cell or a group of electroluminescent cells. EL display cells coupled to a cermet electrode can also be driven by a field emission device or a low power electron beam.
Inventors
- 👤 Lubomyr Stephen Onyskevych
- 👤 Satyam C. Cherukuri
- 👤 Ashok Narayan Prabhu
- 👤 P. Niel Yocom
- 👤 Kenneth E. Salsman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:01
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/22; G09G3/30; H; H01; H01J; H01J31/00; H01J31/08; H01J31/10; H01J31/12; H01J31/123; H01J31/125; H01J31/127; H01J2201/00; H01J2201/30; H01J2201/304; H01J2329/00; H01J2329/90; H01J2329/92; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0306; H05K1/16; H05K3/00; H05K3/46; H05K3/4611; H05K3/4626; H05K3/4629; H05K3/4641; H10; H10W; H10W90/00; H10W90/701; H10W90/721; H10W90/724; H10W90/751; H10W90/754
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
84 words
An electroluminescent display comprising: a ceramic substrate having a first planar surface; a plurality of electroluminescent cells mounted on said first planar surface; a plurality of driver circuits for driving the plurality of electroluminescent cells; and a plurality of connectors extending through said ceramic substrate which couple the plurality of electroluminescent cells to the plurality of driver circuits, each of the plurality of connectors comprising an insulating wall defining an insulated via through said ceramic substrate, said via being filled with a conductive material.
Claim 2
Dependent Claim
84 words
An electroluminescent display comprising: a ceramic substrate having a first planar surface; a plurality of electroluminescent cells mounted on said first planar surface; a plurality of driver circuits for driving the plurality of electroluminescent cells; and a plurality of connectors extending through said ceramic substrate which couple the plurality of electroluminescent cells to the plurality of driver circuits, each of the plurality of connectors comprising an insulating wall defining an insulated via through said ceramic substrate, said via being filled with a conductive material.
Claim 3
Dependent Claim
37 words
The electroluminescent display of claim 1 wherein: said ceramic substrate has a second planar surface parallel to the first surface, and the plurality of driver circuits are mounted on said second planar surface of said ceramic substrate.
Claim 4
Dependent Claim
23 words
The electroluminescent display of claim 1 wherein each of said plurality of driver circuits drives a respectively different one of said electroluminescent cells.
Claim 5
Dependent Claim
22 words
The electroluminescent display of claim 1 wherein each of said plurality of driver circuits drives a respectively different group of electroluminescent cells.
Claim 6
Dependent Claim
72 words
An electroluminescent display comprising: a ceramic substrate having a first planar surface, wherein the ceramic substrate comprises a metal core layer positioned between two ceramic layers; a plurality of electroluminescent cells mounted on said first planar surface; a plurality of driver circuits for driving the plurality of electroluminescent cells; and a plurality of connectors extending through said ceramic substrate which couple the plurality of electroluminescent cells to the plurality of driver circuits.
Claim 7
Dependent Claim
72 words
An electroluminescent display comprising: a ceramic substrate having a first planar surface, wherein the ceramic substrate comprises a metal core layer positioned between two ceramic layers; a plurality of electroluminescent cells mounted on said first planar surface; a plurality of driver circuits for driving the plurality of electroluminescent cells; and a plurality of connectors extending through said ceramic substrate which couple the plurality of electroluminescent cells to the plurality of driver circuits.
Claim 8
Dependent Claim
20 words
The electroluminescent display of claim 2 wherein the plurality of electroluminescent cells and the plurality of driver circuits are encapsulated.
Claim 9
Dependent Claim
100 words
An electroluminescent display comprising: a ceramic substrate having a first planar surface and a second planar surface parallel to the first surface, wherein the ceramic substrate includes an edge surface perpendicular to said first and second planar surfaces, said edge surface including connectors for electrically connecting the ceramic substrate with a second ceramic substrate; a plurality of electroluminescent cells mounted on said first planar surface; a plurality of driver circuits for driving the plurality of electroluminescent cells; and a plurality of connectors extending through said ceramic substrate which couple the plurality of electroluminescent cells to the plurality of driver circuits.
Claim 10
Dependent Claim
100 words
An electroluminescent display comprising: a ceramic substrate having a first planar surface and a second planar surface parallel to the first surface, wherein the ceramic substrate includes an edge surface perpendicular to said first and second planar surfaces, said edge surface including connectors for electrically connecting the ceramic substrate with a second ceramic substrate; a plurality of electroluminescent cells mounted on said first planar surface; a plurality of driver circuits for driving the plurality of electroluminescent cells; and a plurality of connectors extending through said ceramic substrate which couple the plurality of electroluminescent cells to the plurality of driver circuits.
Claim 11
Dependent Claim
44 words
The electroluminescent display of claim 7 wherein the ceramic substrate is electrically connected to said second ceramic substrate by abutting the edge surface of said ceramic substrate against an edge surface of said second ceramic substrate, each of said edge surfaces including electrical connectors.
Claim 12
Dependent Claim
118 words
An electroluminescent display comprising: a ceramic substrate having a first planar surface; a plurality of electroluminescent cells mounted on said first planar surface; a plurality of driver circuits for driving the plurality of electroluminescent cells; and a plurality of connectors extending through said ceramic substrate which couple the plurality of electroluminescent cells to the plurality of driver circuits, wherein ones of said plurality of electroluminescent cells are placed adjacent to the edge of said first planar surface and wherein the spacing between the edge of said first planar surface and said ones of said electroluminescent cells is less than one half of the spacing between adjacent electroluminescent cells placed at an interior portion of said first planar surface.
Claim 13
Dependent Claim
118 words
An electroluminescent display comprising: a ceramic substrate having a first planar surface; a plurality of electroluminescent cells mounted on said first planar surface; a plurality of driver circuits for driving the plurality of electroluminescent cells; and a plurality of connectors extending through said ceramic substrate which couple the plurality of electroluminescent cells to the plurality of driver circuits, wherein ones of said plurality of electroluminescent cells are placed adjacent to the edge of said first planar surface and wherein the spacing between the edge of said first planar surface and said ones of said electroluminescent cells is less than one half of the spacing between adjacent electroluminescent cells placed at an interior portion of said first planar surface.
Claim 14
Dependent Claim
51 words
The electroluminescent display of claim 9 wherein the ceramic substrate includes: a second planar surface parallel to the first planar surface and an edge surface perpendicular to said first and second planar surfaces and a large area display is formed by abutting the edge surfaces of a plurality of ceramic substrates.
Claim 15
Dependent Claim
29 words
The electroluminescent display of claim 5 wherein the metal core layer includes feedthroughs for providing signal distribution from said plurality of driver circuits to said plurality of electroluminescent cells.
Claim 16
Dependent Claim
17 words
The electroluminescent display of claim 5 wherein the metal core layer provides a means for heat dissipation.
Claim 17
Dependent Claim
85 words
An electroluminescent display comprising: a ceramic substrate having a first planar surface, wherein the first planar surface of said ceramic substrate is polished and includes a glass layer deposited on the polished first planar surface of the ceramic substrate; a plurality of electroluminescent cells mounted on said first planar surface; a plurality of driver circuits for driving the plurality of electroluminescent cells; and a plurality of connectors extending through said ceramic substrate which couple the plurality of electroluminescent cells to the plurality of driver circuits.
Claim 18
Dependent Claim
85 words
An electroluminescent display comprising: a ceramic substrate having a first planar surface, wherein the first planar surface of said ceramic substrate is polished and includes a glass layer deposited on the polished first planar surface of the ceramic substrate; a plurality of electroluminescent cells mounted on said first planar surface; a plurality of driver circuits for driving the plurality of electroluminescent cells; and a plurality of connectors extending through said ceramic substrate which couple the plurality of electroluminescent cells to the plurality of driver circuits.
Claim 19
Dependent Claim
31 words
The electroluminescent display of claim 1 wherein the electroluminescent cells are arranged in rows and columns and a single column of electroluminescent cells is driven by a plurality of driver circuits.
Claim 20
Dependent Claim
19 words
The electroluminescent display of claim 5, wherein connectors include conductive material that is insulated from said metal core layer.
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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) | 2000-06-30 | 2000-12-30 | 2001-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-30 | 2004-12-30 | 2005-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-30 | 2008-12-30 | 2009-07-01 | $7700.00 | Window Closed / Lapsed |