Patent US3921026A successfully refreshed from Google Patents.
US3921026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state display apparatus
Assignee: Panasonic Holdings Corp
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Filing: 1973-08-20
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Granted: 1975-11-18
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Expires: 1993-08-20
Abstract
Abstract In a transparent resin wafer are confined units made up of a light-emitting diode capable of emitting infrared light and a luminescent stick consisting of infrared-excitable luminescent material and transparent resin, and seven of these units are arranged so as to indicate a numeral by seven light segments, so that when specified ones of the light-emitting diodes are lit, the respective sticks or strips combined therewith are excited by infrared light from the light-emitting diodes to indicate a desired numeral. By selecting a suitable luminescent material, any desired color is obtainable.
Inventors
- 👤 Kenichi Konishi
- 👤 Shohei Fujiwara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:55
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80; H10H20/85; H10H20/851; H10H20/8514; G; G09; G09F; G09F9/00; G09F9/30; G09F9/302; G09F9/3023; F; F02; F02D; F02D41/00; F02D41/02; F02D41/14; F02D41/1438; F02D41/1444; F02D41/1454; F02D41/1456; H10H20/8515; H10W; H10W72/00; H10W72/50; H10W72/531; H10W72/5363; H10W72/851; H10W72/874; H10W72/884; H10W90/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
197 words
A solid-state display apparatus comprising an electrically conductive substrate having a plurality of recesses in one face thereof, and an insulating substrate on which said conductive substrate is supported, an infrared-emitting diode having electrodes thereon positioned in and secured to the bottom of each of said recesses, one of said electrodes being electrically connected to said bottom, a luminescent stick containing infrared-excitable luminescent material and light-conductive resin positioned in each recess at a position spaced from said infrared-emitting diode, a transparent light-conductive resin wafer in each of said recesses extending from said diode to said luminescent stick and having a flat bottom face, flat side faces and a flat upper surface, said bottom face and said upper surface being parallel to each other, and surrounding said infraredemitting diode and said luminescent stick and for conducting and reflecting infrared emissions from the diode to the luminescent stick by total reflection, said sticks being positioned on said substrate in a pattern for indicating a desired configuration when lit, a plurality of connecting tabs on said insulating substrate, one for each recess, and a wire connecting the other electrode of each of said infrared-emitting diodes to a corresponding connecting tab.
Claim 2
Dependent Claim
197 words
A solid-state display apparatus comprising an electrically conductive substrate having a plurality of recesses in one face thereof, and an insulating substrate on which said conductive substrate is supported, an infrared-emitting diode having electrodes thereon positioned in and secured to the bottom of each of said recesses, one of said electrodes being electrically connected to said bottom, a luminescent stick containing infrared-excitable luminescent material and light-conductive resin positioned in each recess at a position spaced from said infrared-emitting diode, a transparent light-conductive resin wafer in each of said recesses extending from said diode to said luminescent stick and having a flat bottom face, flat side faces and a flat upper surface, said bottom face and said upper surface being parallel to each other, and surrounding said infraredemitting diode and said luminescent stick and for conducting and reflecting infrared emissions from the diode to the luminescent stick by total reflection, said sticks being positioned on said substrate in a pattern for indicating a desired configuration when lit, a plurality of connecting tabs on said insulating substrate, one for each recess, and a wire connecting the other electrode of each of said infrared-emitting diodes to a corresponding connecting tab.
Claim 3
Dependent Claim
51 words
A solid-state display apparatus as claimed in claim 1 in which each recess has a flat bottom and flat smooth side walls, and said transparent light-conductive resin wafer fills each of said recesses with the bottom and side walls of the recess defining the bottom and side surfaces of said resin.
Claim 4
Dependent Claim
21 words
A solid-state display apparatus as claimed in claim 1 wherein the infrared-emitting diode comprises a GaAs semiconductor with a P-N junction.
Claim 5
Dependent Claim
44 words
A solid-state display apparatus as claimed in claim 1 wherein said luminescent stick is longer than said diode in a direction parallel to the plane of the substrate and perpendicular to the shortest line between said diode and said luminescent stick-has been substituted therefor.
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) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |