US3886581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display device using light-emitting semiconductor elements
Assignee: Toshiba Corp
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Filing: 1973-12-21
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Granted: 1975-05-27
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Expires: 1993-12-21
Abstract
Abstract A display device having a plurality of light-emitting semiconductor elements arranged on an electric insulation base plate in a prescribed pattern with the respective P-N junctions positioned perpendicular to the base plate, thereby displaying numbers or characters when the semiconductor elements are selectively energized, wherein the light-emitting semiconductor elements are fixed to electric insulation adhesive layers coated on the prescribed parts of the base plate, a pair of electrodes formed on both surfaces of the respective semiconductor elements are disposed parallel to the P-N junction, and a pair of conductive adhesive layers connect electrically the electrodes to conductive layers printed on the base plate.
Inventors
- 👤 Hiroshi Katsumura
- 👤 Hiroshi Fujita
- 👤 Kei Kaneda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:43
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/30; H05K3/303; H05K3/305; G; G09; G09F; G09F9/00; G09F9/30; G09F9/33; H10; H10W; H10W90/00; H05K2201/00; H05K2201/10; H05K2201/10007; H05K2201/10106; H05K2201/10613; H05K2201/10621; H05K2201/10636; H10H; H10H20/00; H10H20/80; H10H20/85; H10H20/8506; H10H20/852; H10H20/853; H10H20/855; H10H20/857; H10W72/00; H10W72/071; H10W72/072; H10W72/07251; H10W72/20; Y; Y02; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
125 words
A display device comprising an insulation base plate; a plurality of light-emitting semiconductor elements arranged on the base plate in a prescribed pattern, each of said semiconductor elements having a P-N junction and electrodes formed on both surfaces so disposed as to face the P-N junction, said semiconductor elements each being disposed to the base plate with the P-N junction disposed nonparallel to the base plate; an organic electric insulation adhesive layer covering part of the exposed P-N junction plane of the semiconductor element so as to fix it to the base plate; a conductive layer printed on the base plate; and a connector laid on the electric insulation adhesive layer for electrical connection of the electrodes of the semiconductor element to the conductive layer.
Claim 2
Dependent Claim
125 words
A display device comprising an insulation base plate; a plurality of light-emitting semiconductor elements arranged on the base plate in a prescribed pattern, each of said semiconductor elements having a P-N junction and electrodes formed on both surfaces so disposed as to face the P-N junction, said semiconductor elements each being disposed to the base plate with the P-N junction disposed nonparallel to the base plate; an organic electric insulation adhesive layer covering part of the exposed P-N junction plane of the semiconductor element so as to fix it to the base plate; a conductive layer printed on the base plate; and a connector laid on the electric insulation adhesive layer for electrical connection of the electrodes of the semiconductor element to the conductive layer.
Claim 3
Dependent Claim
33 words
A display device according to claim 1, wherein the semiconductor element is made of one compound selected from the group consisting of gallium phosphide (GaP), gallium arsenide (GaAs) and gallium arsenic phosphide (GaAsP).
Claim 4
Dependent Claim
28 words
A display device according to claim 1, wherein the semiconductor element is fitted to the base plate with the P-N junction disposed substantially perpendicular to the base plate.
Claim 5
Dependent Claim
44 words
A display device according to claim 1, wherein a plurality of semiconductor elements are arranged on the base plate in a prescribed pattern so as to indicate numbers or characters and bear such dimensions as substantially match the segments of the numbers or characters.
Claim 6
Dependent Claim
22 words
A display device according to claim 1, wherein the organic electric insulation adhesive layer is prepared from epoxy resin or silicone resin.
Claim 7
Dependent Claim
35 words
A display device according to claim 1, wherein the connector is a paste of silver (Ag), or a solder consisting of metal such as a lead (Pb)-tin (Sn) alloy or a gold (Au)-tin (Sn) alloy.
Claim 8
Dependent Claim
55 words
A display device according to claim 1, wherein the base plate is provided with a groove wide enough to allow the organic electric insulation adhesive material to be carried into an interstice between the side walls of the groove and the outer walls of the semiconductor element when the latter is fitted into the groove.
Claim 9
Dependent Claim
112 words
A display device comprising an insulation base plate; a plurality of light-emitting semiconductor elements arranged on the base plate in a prescribed pattern, each of said conductor elements having electrodes formed on both sides and a P-N junction disposed parallel to said both sides, said P-N junction being disposed perpendicular to the base plate and partly exposed to the outside; an organic electric insulation adhesive layer for fixing the semiconductor element to the base plate; a conductive layer printed on the base plate for power supply; and a conductive adhesive layer laid oN the electric insulation adhesive layer for electrical connection of the electrodes of the semiconductor element to the conductive layer.
Claim 10
Dependent Claim
112 words
A display device comprising an insulation base plate; a plurality of light-emitting semiconductor elements arranged on the base plate in a prescribed pattern, each of said conductor elements having electrodes formed on both sides and a P-N junction disposed parallel to said both sides, said P-N junction being disposed perpendicular to the base plate and partly exposed to the outside; an organic electric insulation adhesive layer for fixing the semiconductor element to the base plate; a conductive layer printed on the base plate for power supply; and a conductive adhesive layer laid oN the electric insulation adhesive layer for electrical connection of the electrodes of the semiconductor element to the conductive layer.
Claim 11
Dependent Claim
20 words
A display device according to claim 8, wherein the light-emitting semiconductor element takes the form of a plate or rod.
Claim 12
Dependent Claim
26 words
A display device according to claim 8, wherein the light-emitting semiconductor elements bear such dimensions as substantially match the segments of numbers and characters being displayed.
Claim 13
Dependent Claim
26 words
A display device according to claim 8, wherein the electric insulation adhesive layer is transparent and further tinted with the same color as an emitted light.
References Cited (Backward Citations)
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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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |