US3911431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-emitting display device
Assignee: Toshiba Corp
•
Filing: 1974-01-21
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Granted: 1975-10-07
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Expires: 1994-01-21
Abstract
Abstract A light-emitting display device comprising a plurality of lightemitting semiconductor elements so arranged as to represent a desired pattern on a base plate bearing printed conductive layers, wherein the light-emitting semiconductor elements are bonded to the base plate by an electric insulation adhesive with the P-N junction disposed perpendicular to the base plate; and both opposite lateral walls of each light-emitting semiconductor element which are parallel with the P-N junction are fitted with a conductive light screen.
Inventors
- 👤 Hiroshi Katsumura
- 👤 Kei Kaneda
- 👤 Osamu Abe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:41
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H10; H10H; H10H20/00; H10H20/80; H10W; H10W90/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
140 words
A light-emitting display device comprising an electric insulation base plate bearing printed conductive layers; a plurality of light-emitting semiconductor elements bonded to prescribed parts of the base plate to present a desired pattern with the P-N junction of each light-emitting semiconductor element positioned substantially perpendicular to the base plate and each light-emitting semiconductor element having a pair of ohmic electrodes formed on opposite lateral surfaces thereof; a pair of conductive light reflective screens disposed adjacent to and in contact with the ohmic electrodes of each light-emitting semiconductor element; an electric insulation adhesive for bonding each light-emitting semiconductor element to a prescribed part of the base plate; and a conductive adhesive layer for each light-emitting semiconductor element disposed to cover the electric insulation adhesive layer to electrically connect the conductive layers printed on the base plate to the light reflective screens.
Claim 2
Dependent Claim
140 words
A light-emitting display device comprising an electric insulation base plate bearing printed conductive layers; a plurality of light-emitting semiconductor elements bonded to prescribed parts of the base plate to present a desired pattern with the P-N junction of each light-emitting semiconductor element positioned substantially perpendicular to the base plate and each light-emitting semiconductor element having a pair of ohmic electrodes formed on opposite lateral surfaces thereof; a pair of conductive light reflective screens disposed adjacent to and in contact with the ohmic electrodes of each light-emitting semiconductor element; an electric insulation adhesive for bonding each light-emitting semiconductor element to a prescribed part of the base plate; and a conductive adhesive layer for each light-emitting semiconductor element disposed to cover the electric insulation adhesive layer to electrically connect the conductive layers printed on the base plate to the light reflective screens.
Claim 3
Dependent Claim
21 words
A light-emitting display device according to claim 1, wherein the conductive light screens are formed of metal membranes of different colors.
Claim 4
Dependent Claim
20 words
A light-emitting display device according to claim 1, wherein the conductive light screens are made of highly reflective metal membranes.
Claim 5
Dependent Claim
61 words
A light-emitting display device according to claim 1, wherein one of the conductive light screens is made of one metal selected from the group consisting of gold, silver, platinum, nickel and aluminum, and the other conductive light screen is formed of onE metal selected from the above-mentioned group having a different color from the metal constituting the first mentioned light screen.
Claim 6
Dependent Claim
45 words
A light-emitting display device according to claim 1, wherein the ohmic electrodes are mounted on part of both opposite lateral surfaces of the light-emitting semiconductor element, and the light screens are laid all over the light-emitting semiconductor element so as to cover the ohmic electrodes.
Claim 7
Dependent Claim
51 words
A light-emitting display device according to claim 1, wherein the ohmic electrodes are disposed on opposite lateral surfaces of the light-emitting semiconductor element, and the light screens are disposed on said both opposite lateral surfaces of the light-emitting semiconductor element, except for those portions which are disposed on the ohmic electrodes.
Claim 8
Dependent Claim
73 words
A light-emitting display device according to claim 6, wherein the light screen disposed on the P region surface of the light-emitting semiconductor element consists of one alloy selected from the group consisting of a gold (Au) - zinc (Zn) alloy and a gold (Au) - beryllium (Be) alloy, and the light screen laid on the N region surface of the light-emitting semiconductor element is made of a gold (Au) - silicon (Si) alloy.
Claim 9
Dependent Claim
21 words
A light-emitting display device according to claim 1, wherein the conductive light screens are prepared from metal membranes bearing different shapes.
References Cited (Backward Citations)
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US3611069A
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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) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |