CA2437494A1 - Strip lighting apparatus and method - Google Patents

Strip lighting apparatus and method Download PDF

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Publication number
CA2437494A1
CA2437494A1 CA002437494A CA2437494A CA2437494A1 CA 2437494 A1 CA2437494 A1 CA 2437494A1 CA 002437494 A CA002437494 A CA 002437494A CA 2437494 A CA2437494 A CA 2437494A CA 2437494 A1 CA2437494 A1 CA 2437494A1
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CA
Canada
Prior art keywords
waveguide
illumination apparatus
elongate
light
elongated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002437494A
Other languages
French (fr)
Other versions
CA2437494C (en
Inventor
David G. Pelka
William A. Parkyn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seoul Semiconductor Co Ltd
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2437494A1 publication Critical patent/CA2437494A1/en
Application granted granted Critical
Publication of CA2437494C publication Critical patent/CA2437494C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0005—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type
    • G02B6/001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type the light being emitted along at least a portion of the lateral surface of the fibre
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/237—Light guides characterised by the shape of the light guide rod-shaped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/242—Light guides characterised by the emission area
    • F21S43/245—Light guides characterised by the emission area emitting light from one or more of its major surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/247—Light guides with a single light source being coupled into the light guide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/249—Light guides with two or more light sources being coupled into the light guide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes

Abstract

An illumination apparatus comprises an elongated waveguide having proximal and distal ends and a central longitudinal axis. The waveguide includes an elongated forward side for outputting light and an elongated rearward side having an elongated reflective surface for reflecting light towards the forward side. A light source such as a solid state light emitter may be situated on the proximal end of the waveguide introduces light into the waveguide in the form of a beam which propagates from the proximal end to the distal end. Light traveling within the waveguide is reflected from the reflective surface along the elongated rearward side towards the forward side for viewing.

Claims (37)

1. An illumination apparatus, comprising:
an elongated waveguide having proximal and distal ends and a central longitudinal axis, said waveguide comprising an elongated forward side for outputting light and an elongated rearward side for reflecting light towards the forward side, said rearward side comprising an elongated reflective surface;
and a source of light comprising solid state light emitter on the proximal end of the waveguide which introduces light into the waveguide in the form of a substantially collimated beam having a divergence angle .alpha., said waveguide having a width at the distal end approximately equal to 2 L tan(.alpha.), where L is the length of the waveguide between said ends.
2. The illumination apparatus of Claim 1, wherein said waveguide has an asymmetric cross-section and said width corresponds to the smallest width.
3. The illumination apparatus of Claim 1, wherein said solid state light emitter comprises a light emitting diode (LED).
4. The illumination apparatus of Claim 3, wherein said source of light further comprises at least one lens for coupling light from said light source into said elongate waveguide.
5. The illumination apparatus of Claim 3, wherein said source of light further comprises a nonimaging optical element for coupling light from said light source into said elongate waveguide.
6. The illumination apparatus of Claim 1, wherein said elongate reflective surface is diffusely reflective to scatter light propagating within said waveguide out said forward side through said elongate concave transmissive output surface.
7. The illumination apparatus of Claim 6, wherein said elongate reflective surface includes a diffusely reflective layer formed thereon.
8. The illumination apparatus of Claim 1, wherein said distal end has a reflective surface that reflects light back toward said proximal end.
9. The illumination apparatus of Claim 8, wherein said width corresponds to said width of said reflective surface.
10. The illumination apparatus of Claim 8, wherein said reflecting surface is oriented at a non-perpendicular angle with respect to said longitudinal axis.
11. The illumination apparatus of Claim 1, wherein said elongate waveguide comprises material substantially optical transmissive to visible light.
12. The illumination apparatus of Claim 11, wherein said elongate waveguide comprises material selected from the group consisting essentially of plastic and glass.
13. The illumination apparatus of Claim 12, wherein said elongate waveguide comprises material selected from the group consisting essentially of acrylic, polycarbonate, and silicone.
14. The illumination apparatus of Claim 1, wherein said elongate waveguide has a length ranging between about 4 inches to about 8 feet.
15. The illumination apparatus of Claim 14, wherein said elongate waveguide has a width perpendicular to said length ranging between about 1/4 inch to about 2 inches.
16. An illumination apparatus, comprising:
an elongated waveguide having proximal and distal ends and a central longitudinal axis, said waveguide comprising an elongated forward side for outputting light and an elongated rearward side for reflecting light towards the forward side, said rearward side comprising an elongated reflective surface;
and a solid state light emitter on the proximal end of the waveguide which introduces light into the waveguide, wherein said distal end of said waveguide has a reflective surface which is non-perpendicular to the central axis of the waveguide.
17. An illumination apparatus, comprising:
an elongate waveguide comprising a forward side for outputting light and a rearward side for reflecting light toward said forward side, said waveguide comprising first and second waveguide portions, each of said portions comprising an elongate concave transmissive output surface and an elongate reflective surface, said elongate waveguide portions being joined such that (i) said transmissive surfaces are in side-by-side relationship and such that (ii) said elongate reflective surfaces converge towards said forward side and flare outwardly toward said rearward side.
18. The illumination apparatus of Claim 17, wherein said elongate concave transmissive output surface is in the form of a segment of a right circular cylinder surface.
19. The illumination apparatus of Claim 18, wherein said elongate concave transmissive output surface forms a cylindrical lens surface.
20. The illumination apparatus of Claim 17, wherein said elongate concave transmissive output surface is smooth to minimize scattering of light output through said forward side of said elongate waveguide.
21. The illumination apparatus of Claim 20, wherein said elongate concave transmissive output surface is polished.
22. The illumination apparatus of Claim 17, wherein said elongate waveguide portions are joined such that said transmissive surfaces associated with said first portion transitions smoothly into said transmissive surface associated with said second portion.
23. The illumination apparatus of Claim 17, wherein said elongate reflective surface in each of said first and second waveguide portions comprises a single planar reflective surface.
24. The illumination apparatus of Claim 17, wherein said elongate reflective surface in each of said first and second waveguide portions comprises a plurality of planar reflective surfaces that together form a convex surface.
25. The illumination apparatus of Claim 17, wherein said elongate reflective surface in each of said first and second waveguide portions comprises a convex surface.
26. The illumination apparatus of Claim 17, wherein said elongate reflective surface in each of said first and second waveguide portions comprises a concave surface.
27. The illumination apparatus of Claim 26, wherein said elongate reflective surface in each of said first and second waveguide portions comprises a plurality of planar reflective surfaces that together form a concave surface in each of said waveguide portions.
28. The illumination apparatus of Claim 17, wherein said elongate waveguide portions comprise separate structures contacted together forming a seam therebetween.
29. The illumination apparatus of Claim 17, wherein said elongate waveguide portions are integrally and seamlessly connected together as one.
30. The illumination apparatus of Claim 17, wherein said elongate reflective surfaces converge towards said forward side such that a distance no more than about 10%
of said width of waveguide separates said elongate reflective surfaces and said elongate concave transmissive output surface at said convergence.
31. An illumination apparatus, comprising:

an elongated waveguide comprising an elongated forward side having a concave surface for outputting light and an elongated rearward side having a convex surface for reflecting light towards the forward side, said convex surface of said rearward side comprising an elongated reflective surface.
32. The illumination apparatus of Claim 31, wherein said concave and convex surfaces are parallel.
33. An illumination apparatus, comprising:
an elongated waveguide comprising an elongated forward side for outputting light and an elongated rearward side for reflecting light towards the forward side, said rearward side comprising an elongated reflective surface; and a non-imaging optical element on one end of the waveguide which couples light from a light source into the waveguide, said non-imaging optical element providing an input aperture and an output aperture, one of said apertures larger than the other, said non-imaging optical element having sidewalls curved longitudinally between the input and output apertures such that the sidewalls couple light from the input aperture to the output aperture.
34. An illumination apparatus, comprising:
an elongated waveguide having a central longitudinal axis and a cross-section perpendicular to said longitudinal axis, said waveguide comprising an elongated forward side having an elongate illumination surface for outputting light and an elongated rearward side for reflecting light towards the forward side, said rearward side comprising an elongated reflective surface, wherein said waveguide is cross-sectionally shaped to function as a non-imaging optic for light propagating from said rearward side to said forward side.
35. The illumination apparatus of Claim 34, wherein said cross-section is asymmetric with respect to a first plane that contains the longitudinal axis, said first plane orthogonal to a second plane that (i) intersects the first plane along the longitudinal axis and (ii) longitudinally bisects said elongated illumination surface.
36. The illumination apparatus of Claim 35, wherein said cross-section is also asymmetric with respect to the second plane.
37. The illumination apparatus of Claim 34, wherein said cross-section is uniform throughout the length of the waveguide.
CA2437494A 2000-11-15 2001-11-15 Strip lighting apparatus and method Expired - Lifetime CA2437494C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US24918200P 2000-11-15 2000-11-15
US60/249,182 2000-11-15
US09/993,286 2001-11-14
US09/993,286 US6637924B2 (en) 2000-11-15 2001-11-14 Strip lighting apparatus and method
PCT/US2001/045289 WO2002040917A2 (en) 2000-11-15 2001-11-15 Strip lighting apparatus and method

Publications (2)

Publication Number Publication Date
CA2437494A1 true CA2437494A1 (en) 2002-05-23
CA2437494C CA2437494C (en) 2010-07-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA2437494A Expired - Lifetime CA2437494C (en) 2000-11-15 2001-11-15 Strip lighting apparatus and method

Country Status (5)

Country Link
US (1) US6637924B2 (en)
EP (1) EP1409921A2 (en)
AU (1) AU2002228696A1 (en)
CA (1) CA2437494C (en)
WO (1) WO2002040917A2 (en)

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US6637924B2 (en) 2003-10-28
US20020114168A1 (en) 2002-08-22

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