Patent US3883772A successfully refreshed from Google Patents.
US3883772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric light-emitting apparatus
Assignee: Panasonic Holdings Corp
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Filing: 1973-04-26
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Granted: 1975-05-13
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Expires: 1993-04-26
Abstract
Abstract This invention relates to an electric light-emitting apparatus, wherein electric light-emitting diodes 4 are contained in lightconducting wafers 5 of transparent resin embedded in recesses 3, which are formed on an electrically conductive substrate 2, respectively, and each wafer 5 has an oblique diffused-reflection plane 6 for reflecting the light conducted from the lightemitting diodes 4.
Inventors
- 👤 Kazuo Wako
- 👤 Kenichi Konishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:46
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80; H10H20/85; H10H20/855; H10H20/856; G; G09; G09F; G09F9/00; G09F9/30; G09F9/302; G09F9/3023; H10H20/852; H10H20/882
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
141 words
A light-emitting apparatus, comprising: an electrically conductive substrate having a predetermined number of recesses, each recess having a flat bottom, smooth vertical side walls and an oblique side wall having a rough surface for diffused reflection, said oblique side wall defining an obtuse angle with the flat bottom; a light-emitting diode secured on the bottom of each of said recesses, one electrode thereof being electrically connected to said bottom; a transparent light-conductive resin wafer tightly embedded in each of said recesses and surrounding said light-emitting diode, an oblique light reflecting roughened face being defined by said oblique side wall, light rays emitted from the lightemitting diode being thereby reflected out from the wafer; an insulating substrate supporting said conductive substrate; and, a wire connecting the other electrode of each of said lightemitting diodes to a connecting tab on said insulating substrate.
Claim 2
Dependent Claim
141 words
A light-emitting apparatus, comprising: an electrically conductive substrate having a predetermined number of recesses, each recess having a flat bottom, smooth vertical side walls and an oblique side wall having a rough surface for diffused reflection, said oblique side wall defining an obtuse angle with the flat bottom; a light-emitting diode secured on the bottom of each of said recesses, one electrode thereof being electrically connected to said bottom; a transparent light-conductive resin wafer tightly embedded in each of said recesses and surrounding said light-emitting diode, an oblique light reflecting roughened face being defined by said oblique side wall, light rays emitted from the lightemitting diode being thereby reflected out from the wafer; an insulating substrate supporting said conductive substrate; and, a wire connecting the other electrode of each of said lightemitting diodes to a connecting tab on said insulating substrate.
Claim 3
Dependent Claim
18 words
The apparatus of claim 1, wherein the oblique side face for diffused reflection is shaped as a belt.
Claim 4
Dependent Claim
21 words
The apparatus of claim 1, wherein the conductive substrate is made of a metal plate, in which said recesses are pressed.
Claim 5
Dependent Claim
24 words
The apparatus of claim 1, wherein the P-N junction of the light-emitting diode is arranged substantially parallel to the flat bottom of the recess.
Claim 6
Dependent Claim
14 words
The apparatus of claim 1, wherein said obtuse angle is between 135* and 145*.
Claim 7
Dependent Claim
23 words
The apparatus of claim 1, wherein the oblique side wall for diffused-reflection has larger area than the light-emitting area of the light-emitting diode.
Claim 8
Dependent Claim
33 words
The apparatus of claim 1, further comprising a light-shielding mask covering the upper face of said apparatus and having slits arranged to pass the light reflected from the oblique side wall for diffused-reflection.
References Cited (Backward Citations)
US3290539A
Cited
US3555335A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |