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US4698730A
Expired / Lapsed
US
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Light-emitting diode
Assignee: Stanley Electric Co Ltd
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Filing: 1986-08-01
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Granted: 1987-10-06
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Expires: 2006-08-01
Abstract
Abstract A light-emitting element of a light-emitting diode is mounted on a lead frame, stem or substrate, and is molded with resin so as to form a lens portion. A cap made of a light-transparent resin and having a hollow portion at the center thereof and an outer pheripheral surface, is mounted on the lens portion with the lens portion in the hollow portion thereof. The outer peripheral surface is formed approximately as a parabolic surface so as to reflect side directed light emitted from said light-emitting element toward an illumination output portion of the light-emitting diode. The lens portion and the cap may be integrally molded as one piece.
Inventors
- 👤 Hirou Sakai
- 👤 Toshihide Kawamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:43
CPC Classifications
F; F21; F21V; F21V17/00; F21V17/04; F21V5/00; F21V5/04; F21V7/00; F21V7/0091; F21Y; F21Y2115/00; F21Y2115/10; H; H10; H10H; H10H20/00; H10H20/80; H10H20/85; H10H20/855; H10H20/856; H10W; H10W74/00; H10W90/00; H10W90/701; H10W90/751; H10W90/756; Y; Y10; Y10S; Y10S362/00; Y10S362/80
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
153 words
A light-emitting diode, comprising: a light-emitting element; means for coupling said light-emitting element to a source of electrical power; a resin lens portion molded around said light-emitting element and including means for directing light emitted by said light-emitting element toward an illumination output portion of said light-emitting diode; and cap means made of a light-transparent resin and having side walls defining a hollow portion substantially at the center of said cap means and extending away from the illumination output portion of said light emitting diode, said side walls having an outer peripheral surface, said cap means being coupled to said lens portion of said light-emitting diode with said lens portion being arranged in said hollow portion; said outer peripheral surface of said cap means walls being formed into approximately a parabolic surface and including means to reflect side-directed light emitted from said light-emitting element toward said illumination output portion of said light-emitting diode.
Claim 2
Dependent Claim
153 words
A light-emitting diode, comprising: a light-emitting element; means for coupling said light-emitting element to a source of electrical power; a resin lens portion molded around said light-emitting element and including means for directing light emitted by said light-emitting element toward an illumination output portion of said light-emitting diode; and cap means made of a light-transparent resin and having side walls defining a hollow portion substantially at the center of said cap means and extending away from the illumination output portion of said light emitting diode, said side walls having an outer peripheral surface, said cap means being coupled to said lens portion of said light-emitting diode with said lens portion being arranged in said hollow portion; said outer peripheral surface of said cap means walls being formed into approximately a parabolic surface and including means to reflect side-directed light emitted from said light-emitting element toward said illumination output portion of said light-emitting diode.
Claim 3
Dependent Claim
36 words
The light-emitting diode of claim 1 wherein a gap is provided between said lens portion and an inner surface of said cap means walls, and a light-transparent liquid resin is filled in said gap and hardened.
Claim 4
Dependent Claim
30 words
The light-emitting diode of claim 1, wherein said outer peripheral surface of said cap means is formed in a rotary parabolic curve having a focal point at said light-emitting element.
Claim 5
Dependent Claim
29 words
The light-emitting diode of claim 1, wherein said illumination output portion comprises said directing means of the lens portion, and an end surface portion of said cap means walls.
Claim 6
Dependent Claim
29 words
The light-emitting diode of claim 4, wherein said end light-emitting portion of said cap means walls comprises a substantially planar surface perpendicular to an axis of said cap means.
Claim 7
Dependent Claim
22 words
The light-emitting diode of claim 5, wherein said directing means of said lens portion comprises a substantially spherical end surface portion thereof.
Claim 8
Dependent Claim
22 words
The light-emitting diode of claim 4, wherein said directing means of said lens portion comprises a substantially spherical end surface portion thereof.
Claim 9
Dependent Claim
23 words
The light-emitting diode of claim 1, wherein said light-emitting element is mounted on one of a lead frame, a stem and a substrate.
Claim 10
Dependent Claim
42 words
The light-emitting diode of claim 1, wherein said light-emitting element is mounted to a lead frame, and is electrically connected to a second lead frame, said lead frames comprising said means for coupling said light-emitting element to a source of electrical power.
Claim 11
Dependent Claim
22 words
The light-emitting diode of claim 1, wherein said light-emitting element is mounted on a substantially flat surface portion in said light-emitting diode.
Claim 12
Dependent Claim
27 words
The light-emitting diode of claim 1, wherein said cap means extends from the vicinity of said light-emitting element to said illumination output portion of said light-emitting diode.
Claim 13
Dependent Claim
38 words
The light-emitting diode of claim 11, wherein said cap means is longer than said lens portion in the longitudinal direction of said light-emitting diode, whereby said lens portion is recessed in said hollow portion of said cap means.
Claim 14
Dependent Claim
30 words
The light-emitting diode of claim 1, wherein said directing means of said lens portion directs light emitted by said light-emitting element substantially parallel to an axis of said cap means.
Claim 15
Dependent Claim
31 words
The light-emitting diode of claim 13, wherein said reflecting means of the cap means walls directs light emitted by said light-emitting element substantially parallel to an axis of said cap means.
Claim 16
Dependent Claim
31 words
The light-emitting diode of claim 1, wherein said reflecting means of the cap means walls directs light emitted by said light-emitting element substantially parallel to an axis of said cap means.
Claim 17
Dependent Claim
73 words
The light-emitting diode of claim 1, wherein said lens portion comprises a cylindrical portion with said directing means comprising a rotary arcuate end, the cylindrical portion having its axis parallel to an axis of said cap means, and wherein said cap means walls include a cylindrical inner surface defining said hollow portion, said inner walls of the cpa means being in close proximity to and surrounding the cylindrical portion of the lens portion.
Claim 18
Dependent Claim
29 words
The light-emitting diode of claim 1, wherein said light-emitting element has a hemispherical light directivity, the axis of said hemisphere being parallel to an axis of said cap means.
Claim 19
Dependent Claim
25 words
The light-emitting diode of claim 17, wherein the axis of said hemisphere is parallel to an axis of the parabolic surface of said cap means.
Claim 20
Dependent Claim
29 words
The light-emitting diode of claim 18, wherein the directing means of said lens portion comprises a rotary arcuate end having an axis parallel to the axis of said hemisphere.
Claim 21
Dependent Claim
21 words
The light-emitting diode of claim 19, wherein the axes of said hemisphere, rotary arcuate end and parabolic surface are substantially coincident.
Claim 22
Dependent Claim
20 words
The light-emitting diode of claim 1, wherein the resin lens portion and the cap means are integral to each other.
Claim 23
Dependent Claim
28 words
The light-emitting diode of claim 1, wherein said directing means and said reflecting means direct substantially parallel light rays toward the illumination output portion of the light-emitting diode.
Claim 24
Dependent Claim
29 words
The light-emitting diode of claim 22, wherein said directing means and said reflecting means direct only substantially parallel light rays toward the illumination output portion of the light-emitting diode.
Claim 25
Dependent Claim
133 words
A light-emitting diode, comprising: a light-emitting element; means for coupling said light-emitting element to a source of electrical power; a resin lens portion molded around said light-emitting element and including means for directing light emitted by said light-emitting element toward an illumination output portion of said light-emitting diode; and a parallel-light fetching portion made of a light-transparent resin and surrounding said lens portion, said parallel-light fetching portion being formed in a single body together with said lens portion, said parallel-light fetching portion having an outer peripheral surface; said outer peripheral surface of said parallel-light fetching portion surrounding said lens portion and said light-emitting element and being formed into approximately a parabolic surface so as to reflect side directed light emitted from said light-emitting element toward said illumination output portion of said light-emitting diode.
Claim 26
Dependent Claim
133 words
A light-emitting diode, comprising: a light-emitting element; means for coupling said light-emitting element to a source of electrical power; a resin lens portion molded around said light-emitting element and including means for directing light emitted by said light-emitting element toward an illumination output portion of said light-emitting diode; and a parallel-light fetching portion made of a light-transparent resin and surrounding said lens portion, said parallel-light fetching portion being formed in a single body together with said lens portion, said parallel-light fetching portion having an outer peripheral surface; said outer peripheral surface of said parallel-light fetching portion surrounding said lens portion and said light-emitting element and being formed into approximately a parabolic surface so as to reflect side directed light emitted from said light-emitting element toward said illumination output portion of said light-emitting diode.
Claim 27
Dependent Claim
41 words
The light-emitting diode of claim 24, wherein said lens portion is formed in a rotary elliptical configuration, and said parabolic surface of said parallel-light fetching portion is formed in a rotary parabolic curve having a focal point at said light-emitting element.
Claim 28
Dependent Claim
31 words
The light-emitting diode of claim 24, wherein said outer peripheral surface of said parallel-light fetching means is formed in a rotary parabolic curve having a focal point at said light-emitting element.
Claim 29
Dependent Claim
30 words
The light-emitting diode of claim 24, wherein said illumination output portion comprises an end light-emitting portion of said lens portion, and an end surface portion of said parallel-light fetching means
Claim 30
Dependent Claim
21 words
The light-emitting diode of claim 27, wherein said end light-emitting portion of said parallel-light fetching means comprises a substantially planar surface.
Claim 31
Dependent Claim
22 words
The light-emitting diode of claim 28, wherein said light-emitting portion of said lens portion comprises a substantially spherical end surface portion thereof.
Claim 32
Dependent Claim
22 words
The light-emitting diode of claim 27, wherein said light-emitting portion of said lens portion comprises a substantially spherical end surface portion thereof.
Claim 33
Dependent Claim
23 words
The light-emitting diode of claim 24, wherein said light-emitting element is mounted on one of a lead frame, a stem and a substrate.
Claim 34
Dependent Claim
42 words
The light-emitting diode of claim 24, wherein said light-emitting element is mounted to a lead frame, and is electrically connected to a second lead frame, said lead frames comprising said means for coupling said light-emitting element to a source of electrical power.
Claim 35
Dependent Claim
22 words
The light-emitting diode of claim 24, wherein said light-emitting element is mounted on a substantially flat surface portion in said light-emitting diode.
Claim 36
Dependent Claim
28 words
The light-emitting diode of claim 24, wherein said parallel-light fetching means extends from the vicinity of said light-emitting element to said illumination output portion of said light-emitting diode.
Claim 37
Dependent Claim
25 words
The light-emitting diode of claim 34, wherein said parallel-light fetching means is longer than said lens portion in the longitudinal direction of said light-emitting diode.
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) | 1990-10-05 | 1991-04-06 | 1991-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-05 | 1995-04-06 | 1995-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-05 | 1999-04-06 | 1999-10-06 | $7700.00 | Window Closed / Lapsed |