CA2565339A1 - High efficiency light source using solid-state emitter and down-conversion material - Google Patents

High efficiency light source using solid-state emitter and down-conversion material Download PDF

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Publication number
CA2565339A1
CA2565339A1 CA002565339A CA2565339A CA2565339A1 CA 2565339 A1 CA2565339 A1 CA 2565339A1 CA 002565339 A CA002565339 A CA 002565339A CA 2565339 A CA2565339 A CA 2565339A CA 2565339 A1 CA2565339 A1 CA 2565339A1
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CA
Canada
Prior art keywords
light
light emitting
emitting apparatus
conversion material
optic device
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
CA002565339A
Other languages
French (fr)
Other versions
CA2565339C (en
Inventor
Nadarajah Narendran
Yimin Gu
Jean Paul Freyssinier
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.)
Rensselaer Polytechnic Institute
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2565339A1 publication Critical patent/CA2565339A1/en
Application granted granted Critical
Publication of CA2565339C publication Critical patent/CA2565339C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/64—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0028—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed refractive and reflective surfaces, e.g. non-imaging catadioptric systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0052—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a laser diode
    • 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
    • G02B6/0003—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 doped with fluorescent agents
    • 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
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • 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
    • G02B6/0011—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 planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031—Reflecting element, sheet or layer
    • 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
    • G02B6/0011—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 planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/58—Optical field-shaping elements

Abstract

A light emitting apparatus includes a source of light (17); a down conversion material (12) receiving the emitted light, and converting the emitted light into transmitted light and backward transmitted light; and an optic device (14a, 14b) configured to receive the backward transmitted light and transfer the backward transmitted light outside of the optic device. The source (17) of light is a semiconductor light emitting diode, a laser diode or a resonant cavity light emitting diode. The down conversion material includes one of phosphor or other material for absorbing light in one spectral region and emitting light in another spectral region. The optic device, or lens, includes light transmissive material.

Claims (27)

1. A light emitting apparatus comprising:
a source of light for emitting light;
a down conversion material receiving the emitted light and converting the emitted light into transmitted light and backward transmitted light; and an optic device configured to receive the backward transmitted light and transfer the backward transmitted light outside of the optic device.
2. The light emitting apparatus of claim 1, wherein the source of light is a semiconductor light emitting diode, including one of a light emitting diode (LED), a laser diode (LD), or a resonant cavity light emitting diode (RCLED).
3. The light emitting apparatus of claim 1, wherein the down conversion material includes one of phosphor or other material for absorbing light in one spectral region and emitting light in another spectral region.
4. The light emitting apparatus of claim 1, wherein the optic device includes a light transmissive material.
5. The light emitting apparatus of claim 1, wherein the optic device includes at least one of a lens or a light guide having a light transmissive property.
6. The light emitting apparatus of claim 1, wherein the optic device is further configured to direct the light emitted from the source toward the down conversion material.
7. The light emitting apparatus of claim 1, wherein the optic device includes one of a lens or a light guide for directing substantially all of the light emitted from the source toward the down conversion material.
8. The light emitting apparatus of claim 1, wherein the source of light is disposed adjacent a first end of the optic device.
9. The light emitting apparatus of claim 8, wherein the down conversion material is disposed adjacent a second end of the optic device, the second end opposed to the first end.
10. The light emitting apparatus of claim 1, wherein the optic device is geometrically configured to transmit the reflected light out of the optic device.
11. The light emitting apparatus of claim 1, wherein the source of light includes a plurality of semiconductor light emitters.
12. The light emitting apparatus of claim 9, wherein the down conversion material is deposited on a portion of the second end of the optic device.
13. The light emitting apparatus of claim 12, wherein the down conversion material is deposited to cover substantially the second end of the optic device.
14. The light emitting apparatus of claim 1, including a collecting device for collecting the reflected light which is transferred out of the optic device.
15. The light emitting apparatus of claim 14, wherein the collecting device includes a reflector for directing the reflected light away from the collecting device.
16. The light emitting apparatus of claim 15, wherein (a) the source of light is disposed adjacent a first end of the optic device, (b) the down conversion material is disposed adjacent a second end of the optic device, and (c) the first end of the optic device is disposed adjacent a first end of the reflector.
17. The light emitting apparatus of claim 1, wherein a geometrical shape of the optic device includes one of a cone, sphere, hyperbola, parabola, ellipse, pyramid, or box shaped.
18. The light emitting apparatus of claim 1, further including a reflector surrounding at least a portion of the optic device, and a light diffuser deposited on top of at least a portion of the reflector.
19. The light emitting apparatus of claim 18, wherein the down conversion material is disposed between the source of light and the reflector, and the down conversion material has a curved shape.
20. A light emitting apparatus comprising:
a cylindrical optic including a light transmissive material;
a light radiation source disposed within the cylindrical optic; and a down conversion material, disposed at a middle section of and within the cylindrical optic, for at least one of transmitting or reflecting light transmitted by the light radiation source.
21. The light emitting apparatus of claim 20, wherein the light radiation source is a semiconductor light emitter, including one of a light emitting diode (LED), a laser diode (LD), or a resonant cavity light emitting diode (RCLED).
22. The light emitting apparatus of claim 20, where the light radiation source is disposed adjacent one lateral end of the cylindrical optic.
23. The light emitting device of claim 20, wherein the light radiation source includes first and second radiation sources, spaced from each other and both disposed adjacent one lateral end of the cylindrical optic.
24. The light emitting device of claim 20, wherein the down conversion material includes one of phosphor or other material for absorbing light in one spectral region and emitting light in another spectral region.
25. The light emitting device of claim 20, wherein the down conversion material is disposed substantially parallel to a longitudinal axis of the cylindrical optic.
26. The light emitting apparatus of claim 20, wherein the light radiation source includes at least one light source on each side of the down conversion material.
27. The light emitting apparatus of claim 26, wherein the light sources are mounted on at least one substrate.
CA2565339A 2004-05-05 2005-05-05 High efficiency light source using solid-state emitter and down-conversion material Active CA2565339C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US56837304P 2004-05-05 2004-05-05
US60/568,373 2004-05-05
US63612304P 2004-12-15 2004-12-15
US60/636,123 2004-12-15
PCT/US2005/015736 WO2005107420A2 (en) 2004-05-05 2005-05-05 High efficiency light source using solid-state emitter and down-conversion material

Publications (2)

Publication Number Publication Date
CA2565339A1 true CA2565339A1 (en) 2005-11-17
CA2565339C CA2565339C (en) 2012-11-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA2565339A Active CA2565339C (en) 2004-05-05 2005-05-05 High efficiency light source using solid-state emitter and down-conversion material

Country Status (10)

Country Link
US (1) US7819549B2 (en)
EP (2) EP2803898B1 (en)
JP (2) JP5301153B2 (en)
KR (4) KR101256919B1 (en)
CN (2) CN101852337B (en)
AU (2) AU2005240186B2 (en)
BR (1) BRPI0510707B1 (en)
CA (1) CA2565339C (en)
HK (1) HK1149313A1 (en)
WO (1) WO2005107420A2 (en)

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