Patent US6679621B2 successfully refreshed from Google Patents.
US6679621B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Side emitting LED and lens
Assignee: Lumileds LLC
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Filing: 2002-06-24
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Granted: 2004-01-20
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Expires: 2022-06-24
Abstract
Abstract A lens comprises a bottom surface, a reflecting surface, a first refracting surface obliquely angled with respect to a central axis of the lens, and a second refracting surface extending as a smooth curve from the bottom surface to the first refracting surface. Light entering the lens through the bottom surface and directly incident on the reflecting surface is reflected from the reflecting surface to the first refracting surface and refracted by the first refracting surface to exit the lens in a direction substantially perpendicular to the central axis of the lens. Light entering the lens through the bottom surface and directly incident on the second refracting surface is refracted by the second refracting surface to exit the lens in a direction substantially perpendicular to the central axis of the lens. The lens may be advantageously employed with LEDs, for example, to provide side-emitting light-emitting devices. A lens cap attachable to a lens is also provided.
Inventors
- 👤 Robert S. West
- 👤 Gary D. Sasser
- 👤 James W. Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:42
CPC Classifications
G; G02; G02B; G02B19/00; G02B19/0033; G02B19/0047; G02B19/0071; F; F21; F21V; F21V13/00; F21V13/02; F21V13/04; F21V5/00; F21V5/04; F21V7/00; F21V7/0091; G02B19/0004; G02B19/0028; G02B19/0061; G02B27/00; G02B27/09; G02B27/0938; G02B27/095; G02B27/0955; G02B3/00; G02B3/02; G02B3/08; G02B6/00; G02B6/0001; G02B6/0011; G02B6/0013; G02B6/0015; G02B6/0018; G02B6/002; G02B6/0021; G02B6/0033; H; H10; H10H; H10H20/00; H10H20/80; H10H20/85; H10H20/855; F21Y; F21Y2115/00; F21Y2115/10; H10H20/856
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
134 words
A lens comprising: a bottom surface; a reflecting surface; a first refracting surface obliquely angled with respect to a central axis of the lens; and a second refracting surface extending as a smooth curve from the bottom surface to the first refracting surface; wherein light entering the lens through the bottom surface and directly incident on the reflecting surface is reflected from the reflecting surface to the first refracting surface and refracted by the first refracting surface to exit the lens in a direction substantially perpendicular to the central axis of the lens, and wherein light entering the lens through the bottom surface and directly incident on the second refracting surface is refracted by the second refracting surface to exit the lens in a direction substantially perpendicular to the central axis of the lens.
Claim 2
Dependent Claim
134 words
A lens comprising: a bottom surface; a reflecting surface; a first refracting surface obliquely angled with respect to a central axis of the lens; and a second refracting surface extending as a smooth curve from the bottom surface to the first refracting surface; wherein light entering the lens through the bottom surface and directly incident on the reflecting surface is reflected from the reflecting surface to the first refracting surface and refracted by the first refracting surface to exit the lens in a direction substantially perpendicular to the central axis of the lens, and wherein light entering the lens through the bottom surface and directly incident on the second refracting surface is refracted by the second refracting surface to exit the lens in a direction substantially perpendicular to the central axis of the lens.
Claim 3
Dependent Claim
21 words
The lens of claim 1 , wherein at least a portion of the bottom surface is perpendicular to the central axis.
Claim 4
Dependent Claim
15 words
The lens of claim 1 , wherein the reflecting surface reflects by total internal reflection.
Claim 5
Dependent Claim
20 words
The lens of claim 1 , wherein the reflecting surface is a surface of a funnel-shaped portion of the lens.
Claim 6
Dependent Claim
31 words
The lens of claim 1 , wherein the reflecting surface, the first refracting surface, and the second refracting surface are each portions of surfaces having cylindrical symmetry about the central axis.
Claim 7
Dependent Claim
153 words
A light-emitting device comprising: a light-emitting semiconductor device; and a lens comprising: a bottom surface; a reflecting surface; a first refracting surface obliquely angled with respect to a central axis of the lens; and a second refracting surface extending as a smooth curve from the bottom surface to the first refracting surface; wherein light emitted by the semiconductor device, entering the lens through the bottom surface, and directly incident on the reflecting surface is reflected from the reflecting surface to the first refracting surface and refracted by the first refracting surface to exit the lens in a direction substantially perpendicular to the central axis of the lens, and wherein light emitted by the semiconductor device, entering the lens through the bottom surface, and directly incident on the second refracting surface is refracted by the second refracting surface to exit the lens in a direction substantially perpendicular to the central axis of the lens.
Claim 8
Dependent Claim
153 words
A light-emitting device comprising: a light-emitting semiconductor device; and a lens comprising: a bottom surface; a reflecting surface; a first refracting surface obliquely angled with respect to a central axis of the lens; and a second refracting surface extending as a smooth curve from the bottom surface to the first refracting surface; wherein light emitted by the semiconductor device, entering the lens through the bottom surface, and directly incident on the reflecting surface is reflected from the reflecting surface to the first refracting surface and refracted by the first refracting surface to exit the lens in a direction substantially perpendicular to the central axis of the lens, and wherein light emitted by the semiconductor device, entering the lens through the bottom surface, and directly incident on the second refracting surface is refracted by the second refracting surface to exit the lens in a direction substantially perpendicular to the central axis of the lens.
Claim 9
Dependent Claim
25 words
The light-emitting device of claim 6 , wherein at least a portion of the bottom surface of the lens is perpendicular to the central axis.
Claim 10
Dependent Claim
16 words
The light-emitting device of claim 6 , wherein the reflecting surface reflects by total internal reflection.
Claim 11
Dependent Claim
21 words
The light-emitting device of claim 6 , wherein the reflecting surface is a surface of a funnel-shaped portion of the lens.
Claim 12
Dependent Claim
35 words
The light-emitting device of claim 6 , wherein the reflecting surface, the first refracting surface, and the second refracting surface of the lens are each portions of surfaces having cylindrical symmetry about the central axis.
Claim 13
Dependent Claim
145 words
A lens cap comprising: a bottom surface attachable to a lens; a reflecting surface; a first refracting surface obliquely angled with respect to a central axis of the lens cap; and a second refracting surface extending as a smooth curve from the bottom surface to the first refracting surface; wherein light entering the lens cap through the bottom surface and directly incident on the reflecting surface is reflected from the reflecting surface to the first refracting surface and refracted by the first refracting surface to exit the lens cap in a direction substantially perpendicular to the central axis of the lens, and wherein light entering the lens cap through the bottom surface and directly incident on the second refracting surface is refracted by the second refracting surface to exit the lens cap in a direction substantially perpendicular to the central axis of the lens cap.
Claim 14
Dependent Claim
145 words
A lens cap comprising: a bottom surface attachable to a lens; a reflecting surface; a first refracting surface obliquely angled with respect to a central axis of the lens cap; and a second refracting surface extending as a smooth curve from the bottom surface to the first refracting surface; wherein light entering the lens cap through the bottom surface and directly incident on the reflecting surface is reflected from the reflecting surface to the first refracting surface and refracted by the first refracting surface to exit the lens cap in a direction substantially perpendicular to the central axis of the lens, and wherein light entering the lens cap through the bottom surface and directly incident on the second refracting surface is refracted by the second refracting surface to exit the lens cap in a direction substantially perpendicular to the central axis of the lens cap.
Claim 15
Dependent Claim
22 words
The lens cap of claim 11 , wherein at least a portion of the bottom surface is perpendicular to the central axis.
Claim 16
Dependent Claim
16 words
The lens cap of claim 11 , wherein the reflecting surface reflects by total internal reflection.
Claim 17
Dependent Claim
22 words
The lens cap of claim 11 , wherein the reflecting surface is a surface of a funnel-shaped portion of the lens cap.
Claim 18
Dependent Claim
32 words
The lens cap of claim 11 , wherein the reflecting surface, the first refracting surface, and the second refracting surface are each portions of surfaces having cylindrical symmetry about the central axis.
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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) | 2007-01-19 | 2007-07-21 | 2008-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-01-19 | 2011-07-21 | 2012-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-01-19 | 2015-07-21 | 2016-01-20 | $7700.00 | Window Closed / Lapsed |