Patent US4259679A successfully refreshed from Google Patents.
US4259679A
Expired / Lapsed
US
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Display devices
Assignee: Plessey Overseas Ltd
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Filing: 1979-04-13
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Granted: 1981-03-31
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Expires: 1999-04-13
Abstract
Abstract A display device comprises a light emitting diode chip mounted on a substrate. To reduce or eliminate reflections from metallic connections to the chip, the metallic parts are electroplated with a light absorbing material.
Inventors
- 👤 Terence F. Knibb
- 👤 Richard G. O'Rourke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:10
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/40; G01R13/404; H; H10; H10H; H10H20/00; H10H20/80; H10H20/85; H10H20/855; H10H20/856; H10W; H10W72/00; H10W72/50; H10W72/531; H10W72/536; H10W72/5363; H10W72/551; H10W72/552; H10W72/5522; H10W72/5524
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
68 words
A display device comprising a substrate, a light emitting diode chip, said light emitting diode chip being bonded to said substrate, a plurality of metallic electrical connections, a number of said plurality of electrical connections being bonded to said substrate and a number being connected to said light emitting diode chip, at least some of said metallic electrical connections being electroplated with a layer of light absorbing material.
Claim 2
Dependent Claim
68 words
A display device comprising a substrate, a light emitting diode chip, said light emitting diode chip being bonded to said substrate, a plurality of metallic electrical connections, a number of said plurality of electrical connections being bonded to said substrate and a number being connected to said light emitting diode chip, at least some of said metallic electrical connections being electroplated with a layer of light absorbing material.
Claim 3
Dependent Claim
27 words
A display device as claimed in claim 1 wherein said number of said plurality of electrical connections bonded to said substrate comprises a plurality of gold connectors.
Claim 4
Dependent Claim
29 words
A display device as claimed in claim 2 wherein said light emitting diode chip is bonded to one of said plurality of gold connectors by an electrically conductive adhesive.
Claim 5
Dependent Claim
19 words
A display device as claimed in claim 3 in which said electrically conductive adhesive comprises silver loaded epoxy resin.
Claim 6
Dependent Claim
30 words
A display device as claimed in claim 1 wherein said number of said plurality of electrical connectors connected to said light emitting chip comprises at least one electrically conductive wire.
Claim 7
Dependent Claim
18 words
A display device as claimed in claim 5 wherein said at least one electrically conductive wire is gold.
Claim 8
Dependent Claim
18 words
A display device as claimed in claim 5 wherein said at least one electrically conductive wire is aluminium.
Claim 9
Dependent Claim
23 words
A display device as claimed in claim 5 wherein said at least one electrically conductive wire is a combination of aluminium and titanium.
Claim 10
Dependent Claim
18 words
A display device as claimed in claim 1 wherein said layer of light absorbing material comprises black chromium.
Claim 11
Dependent Claim
18 words
A display device as claimed in claim 1 wherein said layer of light absorbing material comprises black platinum.
Claim 12
Dependent Claim
18 words
A display device as claimed in claim 1 wherein the device is protected from damage by encapasulating means.
Claim 13
Dependent Claim
22 words
A display device as claimed in claim 11 wherein the encapsulating means comprises a transparent plate secured to light absorbing wall members.
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) | 1984-03-30 | 1984-09-29 | 1985-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-30 | 1988-09-29 | 1989-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-30 | 1992-09-29 | 1993-03-31 | $7700.00 | Window Closed / Lapsed |