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WO2008086682A1 - Dispositif électroluminescent et lentille associée - Google Patents

Dispositif électroluminescent et lentille associée Download PDF

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Publication number
WO2008086682A1
WO2008086682A1 PCT/CN2007/003466 CN2007003466W WO2008086682A1 WO 2008086682 A1 WO2008086682 A1 WO 2008086682A1 CN 2007003466 W CN2007003466 W CN 2007003466W WO 2008086682 A1 WO2008086682 A1 WO 2008086682A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
emitting
lens
optical
source
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.)
Ceased
Application number
PCT/CN2007/003466
Other languages
English (en)
Inventor
Ming Lu
Lei Shi
Chak Hau Pang
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.)
Hong Kong Applied Science and Technology Research Institute ASTRI
Original Assignee
Hong Kong Applied Science and Technology Research Institute ASTRI
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 Hong Kong Applied Science and Technology Research Institute ASTRI filed Critical Hong Kong Applied Science and Technology Research Institute ASTRI
Priority to CN200780049773.7A priority Critical patent/CN101578478B/zh
Publication of WO2008086682A1 publication Critical patent/WO2008086682A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • G02B19/0066—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 in the form of an LED array
    • 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
    • G02B19/0009—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only
    • G02B19/0014—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only at least one surface having optical power
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0938—Using specific optical elements
    • G02B27/095—Refractive optical elements
    • G02B27/0955—Lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133609—Direct backlight including means for improving the color mixing, e.g. white
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
    • H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
    • H10H20/80—Constructional details
    • H10H20/85—Packages
    • H10H20/855—Optical field-shaping means, e.g. lenses
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
    • H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
    • H10H20/80—Constructional details
    • H10H20/85—Packages
    • H10H20/855—Optical field-shaping means, e.g. lenses
    • H10H20/856—Reflecting means

Definitions

  • the present invention relates to light-emitting devices, and more particularly, to light-emitting devices comprising a lens for conditioning light output of a plurality of light-emitting sources for forward transmission. More specifically, although not solely limited thereto, the present invention relates to a lens for conditioning the optical output of a plurality of light-emitting sources for display applications, light-emitting assemblies comprising such a lens and a display comprising such light-emitting assemblies.
  • light-emitting sources have light intensity distribution characteristics which are more conveniently depicted by a graph showing a variation of light intensity with reference to radial angles in lateral directions, as described for example in US 2006-0034097A1.
  • Typical semiconductor light-emitting sources for example, packaged light-emitting diodes (LED), are directional and have a characteristic optical axis along which light is propagated.
  • the light intensity of an LED follows the Lambert distribution as depicted in Fig. 27 of US 2OO6-0034097A1. More particularly, a substantial portion of the entire light energy emitted by an LED is contained within an angular range centred about the optical axis and the angular range is commonly referred to as the "viewing angle" of an LED.
  • the viewing angle ranges of an LED are typically between +/-15° to +/- 60° about the optical axis. 'n many applications involving- the use of .. semiconductor_light.emitting- devices, it is desirable to condition the optical output of a plurality of light-emitting sources to suit various objectives.
  • a liquid crystal display is generally equipped with a backlight apparatus comprising an array of LEDs for illuminating an LCD panel from behind, since an LCD display panel is not self-illuminating.
  • a backlight apparatus comprising an array of LEDs for illuminating an LCD panel from behind, since an LCD display panel is not self-illuminating.
  • optical output from a plurality of LEDs for example, LEDs of the three primary colours, red (R), green (G) and blue (B)
  • the mixing of light from a plurality of LEDs, for example, LEDs emitting the three primary colours is advantageous since, by separating the LEDs into a plurality of distributed locations, and then by mixing light from the plurality of distributed sources, problems associated with the high power dissipation and the consequential thermal loading of a high power discrete white LED can be alleviated.
  • the typical distribution characteristics of a typical LED means that a relatively large distance, compared to the length of a display panel, is required for light mixing. Therefore, it will be highly desirable if there can be provided optical arrangements for reducing the light mixing distance between a plurality of LED.
  • a light-emitting assembly comprising a lens, a first optical source, a second optical source and a third optical source, wherein said lens is disposed forward of said first, second and third optical sources; said third optical source is intermediate said first and second optical sources; and said lens and said first, second and third optical sources are arranged so that light emitted from said first and second optical sources merges at said third optical source after undergoing internal reflection at said lens and said light is forwardly transmitted after mixing with light of said third optical source.
  • the optical outputs of a plurality of light-emitting sources can be adequately mixed within a relatively short distance from the sources for forward transmission.
  • said lens comprises a first concave portion and a second concave portion, said first concave portion is configured for reflecting light from said first optical source back towards said third optical source, and said second concave portion is configured for reflecting light from said second optical source back towards said third optical source.
  • said first concave portion may be part oLajiLsLellipse, and said first and third optical sources may be located at the foci of said first ellipse.
  • said second concave portion may form part of a second ellipse, and said second and third optical sources may be located at the foci of said second ellipse.
  • said first and second ellipses intersect, and said third optical source is located at a common foci of both said first and second ellipses.
  • said first and second ellipses intersect at a location directly forward of said third optical source.
  • said first and second ellipses may be identical.
  • the major axes of said first and said second ellipses may be collinear, and said first, second and third optical sources are located on the major axes of said first and second ellipses.
  • said first, second and third optical sources may be distributed at foci of said ellipses.
  • the ratio between the major and the minor axes of each one of said ellipses is larger than 1 and smaller than 1.25.
  • said first optical source may be arranged so that light emitting from said first optical source impinges said lens at an angle exceeding the critical angle and is then reflected towards said third optical source
  • said second optical source is arranged so that light emitting from said second optical source impinges said lens at an angle exceeding the critical angle and is then reflected towards said third optical source
  • said third optical source may be arranged for emitting light forward of said lens.
  • said lens may form a portion of an ellipsoid, and said first, and said second and said third optical sources may be distributed on a focal plane, and said focal plane orthogonally " intersects the major axis of said ellipsoid and contains foci of said ellipsoid.
  • said first, said second and said third optical sources may be LEDs.
  • said first, said second and said third optical sources may be of different colours.
  • said first, said second and said third optical sources may emit red light, green light, or blue light.
  • a lens for conditioning optical output from at least first, second and third light-emitting sources for forward light transmission comprising a first concave portion and a second concave portion, wherein said first concave portion is configured to reflect light emitted by said first light-emitting source towards a third light-emitting source, said second concave portion is configured to reflect light emitted by said second light-emitting source towards said third light-emitting source, and said lens is configured to allow forward passage of light emitted from said third light-emitting source.
  • said first concave portion may-i ⁇ rirLpartof.afirsL ellipse
  • said second concave portion forms part of a second ellipse
  • said first and second ellipses share a common focal point.
  • the major axes of said first and second ellipses may be collinear.
  • the forward facing portion of said lens may be convex.
  • said first and said second ellipses may be identical, and said first and second concave portions of said lens are both formed by revolution of said first or second ellipse about an axis orthogonal to the major axes of said ellipses.
  • said first concave portion may be part of a hollow ellipsoid and said second concave portion may form part of a second hollow.
  • ellipsoid, and said first and second hollow ellipsoids share a common focal point.
  • first and second hollow ellipsoids may be collinear and said first and second hollow ellipsoids may share a common axis which intersects the common focal point and the major axes of the ellipses.
  • said first and second hollow ellipsoids may be identical.
  • said first and second concave portions intersect on an intersection plane, and said intersection plane may be orthogonal to the major axes of said ellipses and contains a common foci of said first and second ellipses.
  • said first concave portion and said first lighfcernitting source,., and said second concave portion and said second light-emitting source may be arranged so that light emitted from said first and said second light-emitting sources will incident said first and second concave portions respectively at the critical angle or above such that light is reflected to said third light-emitting source by total internal reflection.
  • a lens for mixing light from a plurality of peripheral light-emitting sources with a central light-emitting source for forward transmission comprising a plurality of concave portions, wherein each said concave portion forms part of a hollow ellipsoid with said central optical source for positioning at a common foci, and said plurality of peripheral light-emitting sources are distributed at other foci locations of the plurality of hollow ellipsoids forming said plurality of concave portions.
  • the major axes of said plurality of ellipsoids may lie on a common plane, and said common foci is surrounded by said other foci locations.
  • Fig. 1 is a light ray diagram illustrating in schematics optical output from a plurality of LEDs disposed at a plurality of adjacent positions
  • Fig. 1a illustrates the characteristic light intensity distribution of the light- emitting sources of Fig. 1
  • Fig. 2 is a forward perspective view of a light-emitting .assej ⁇ ibjy_depicting-a- first preferred embodiment of this invention
  • Fig. 3 is a front perspective view from behind of lens of Fig. 2,
  • Fig. 4 is a side elevation view of a lens of the light-emitting assembly of Fig. 2,
  • Fig. 5 is a top plan view of the lens of Fig. 2,
  • Fig. 6 is a schematic diagram illustrating the relative disposition of three LEDs disposed within a hollow light-mixing compartment across a transversal section of the lens of Fig. 4,
  • Fig. 7 illustrates in schematics exemplary optical ray paths from a pair of laterally disposed LEDs towards a centrally placed LED
  • Fig. 8 is a schematic optical ray diagram illustrating forwardly transmitted optical beams from the centrally positioned LED device
  • Fig. 10 is a perspective view of a lens illustrating a second preferred embodiment of this invention.
  • Fig. 11 shows a top plan view of the lens of Fig. 10,
  • Fig. 12 is a cross-sectional view of Fig. 10 along the section line A-A',
  • Fig. 13 is a top plane view of the lens of Fig. 10 illustrating positioning of a plurality of peripheral LEDs surrounding a central LED
  • Fig. 14 is a cross-sectional view of Fig. 13 along the section line B-B'
  • Fig. 15 is a schematic diagram depicting an exemplary internal cross- sectional geometric relationship of a lens of this invention.
  • Fig. 16 is a cross-sectional view of an exemplary lens showing a general cross-section of a lens of Fig. 15.
  • a light-emitting assembly comprising a plurality of distributed LEDs with substantially parallel optical axes.
  • the bulk of the light energy is contained within a viewing angle of about 140° with the light intensity concentrated about the optical axes.
  • the light mixing distance is relatively large and is determined by the viewing angles.
  • the light-emitting assembly 100 comprises a lens 120 and a plurality of LEDs, which are used a convenient example of a semiconductor light-emitting source.
  • the lens comprises a lens body 122 and a light-mixing compartment 124 which is defined by a lens body.
  • the light-mixing compartment is defined by a plurality of concave portions 126 which are distributed about a central axis 128 as more particularly depicted in Fig. 3.
  • the light-mixing compartment comprises a plurality of concave portions and each concave portion forms part of an ellipsoid.
  • the plurality of concave portions is formed by intersection of eight partial ellipsoids as more particularly shown in Figs. 2 to 4.
  • the eight concave portions of Figs. 2 to 5 are arranged into four diametrically opposite concave portion pairs and each of the diametrically concave portion pair has a typical cross-section across the centraLaxisjas, shown in Fig. 6.
  • first 132 and second 134 partial ellipses which share a common focal point 146 to take advantage of the property of an ellipse that light rays from one focus of an ellipse will reflect to the other focus.
  • the major axes of the first and second partial ellipses are collinear, with the central axis 128 of the double- concave light mixing compartment 124 orthogonal to the major axes and intersecting the common focal point.
  • the space underneath the first and second ellipses defines a light-mixing compartment to be explained below with reference to Figs. 7 and 8.
  • three LEDs are disposed along the collinear major axes of the first and second ellipses:- a first LED 142 disposed at a focus of the first ellipse which is distal from the second ellipse, a second LED 144 disposed at a focus of the second ellipse which is distal from the first ellipse, and a third LED 146 disposed at a common focus of the first and second ellipses.
  • the first, second and third light sources are collinear.
  • the first, second and third light sources are also, but not essentially, equally spaced apart. As shown in Fig.
  • the common focus is intermediate the non-common foci of the first and second ellipses.
  • the first light-emitting source is configured so that its optical axis is aligned towards the ceiling of the light-mixing compartment defined by the first ellipse 132 and such that the light emitted by the first light-emitting source is incident upon the ceiling of the light-mixing compartment at an angle so that the emergent beam will be forwarded towards the common focus.
  • the second light-emitting source is configured so that light emitting along the optical axis of -the second LED_ will impinge the ceiling of the light-mixing compartment defined by the second ellipse and the resultant emergent beam will also travel towards the common focus to combine with the optical output of the third light-emitting source located at the common focus.
  • the combined resultant beam will be transmitted forwardly away from the third light- emitting source and through the lens, for example, by reflector of the third LED.
  • the optical output from the light-emitting assembly is a light combining all the three optical outputs from the three light-emitting sources, if each of the first, second and third light-emitting sources generates one of the three primary colours, namely, red, green and blue, the resulting light emission from the light-emitting assembly will be a white light.
  • other appropriate coloured light-emitting sources can be appropriately arranged and disposed to generate other coloured light to suit objectives of individual applications.
  • first, second and third light sources are equally spaced apart.
  • the lens is moulded from a transparent material with a hemispherical exterior, for example, PMMA 1 having a refractive index exceeding 1.
  • ⁇ n means the differences in refractive index between the transparent media in the lens body and the light-mixing compartment.
  • the space inside the light- mixing compartment can be air with a refractive index of 1 due to Fresnel reflection
  • the light-mixing compartment is filled with a filler with a refractive index higher than that of the lens material so as to obtain an appropriate difference in the refractive index to cause total internal reflection at interface between the light- mixing compartment and the lens body for appropriate applications.
  • the ceiling of the light-mixing compartment could be formed with a reflective or partially reflective surface so that optical beams can be reflected by mirror reflection towards the common focus, although at least the central, and surrounding portions of the ceiling should remain transparent for forward transmission of light from the third light-emitting source after mixing.
  • a light-mixing compartment defined by two collinear intersecting elliptical portion have been described, it would be appreciated that the concave portions need not be elliptical as long as the optical outputs of the peripheral sources can be merged at the central light-emitting source for forward transmission.
  • the location of the light-emitting sources could be more easily identical for installation purposes.
  • the forward portion of the lens is convex and, more particularly, semi-spherical as shown in Fig. 12.
  • a simple convex surface coupled with a concave light-mixing compartment means the lens can be formed by a single-step molding process which would be highly desirable for low-cost applications.
  • the concave ceiling of the light-mixing compartment also provides means to increase the exit angle of the optical beam coming from the third light source.
  • the concave ceiling also serves as a beam diverging lens for the third light-omitting source (and the combined light emission after light has been mixed at the location of the third light-emitting source) from Figs. 9A-C.
  • a lens 220 of a second preferred embodiment of this invention Similar to the lens of the first embodiment, the lens comprises a lens body 222 with a convex forward portion and a concave light-mixing compartment 224.
  • the light-mixing compartment is defined by revolution of a partial ellipse about a central axis, as shown in Figs. 13 and 14.
  • the transversal cross-section of the light-mixing compartment across the central axis still comprises a pair of intersecting partial ellipses, although the ellipses 232, 234 are identical.
  • Fig. 10 the lens comprises a lens body 222 with a convex forward portion and a concave light-mixing compartment 224.
  • the light-mixing compartment is defined by revolution of a partial ellipse about a central axis, as shown in Figs. 13 and 14.
  • the transversal cross-section of the light-mixing compartment across the central axis still comprises a pair of intersecting partial ellipses
  • a plurality of light- emitting sources 242, 244 can be located at any one of the foci of the ellipse on revolution and, by appropriate aligning the individual light-emitting sources, light from the individual peripheral light-emitting sources can be focused at the central (common) foci for light mixing with central LED 246 before forward transmission.
  • the internal geometry of the light-mixing compartment could be described with a ratio between the length of the major axis and the length of the minor axis as a/b and it has been noted that a smaller a/b ratio will give a better mixing effect and a preferred range of a/b is from more than 1 to 1.25.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Planar Illumination Modules (AREA)
  • Led Device Packages (AREA)

Abstract

L'invention concerne un ensemble électroluminescent (100) qui comprend une lentille (120), une première source optique (142), une deuxième source optique (144) et une troisième source optique (146). La lentille est disposée en aval de la première, de la deuxième et de la troisième source optique. La troisième source optique occupe une position intermédiaire entre la première et la deuxième source optique; et la lentille et lesdites sources optiques sont disposées de telle sorte que la lumière émise par la première source et celle émise par la deuxième source fusionnent au niveau de la troisième source optique après réflexion interne au niveau de la lentille.
PCT/CN2007/003466 2007-01-15 2007-12-06 Dispositif électroluminescent et lentille associée Ceased WO2008086682A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200780049773.7A CN101578478B (zh) 2007-01-15 2007-12-06 发光装置及其透镜

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HK07100517.7 2007-01-15
HK07100517 2007-01-15

Publications (1)

Publication Number Publication Date
WO2008086682A1 true WO2008086682A1 (fr) 2008-07-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2007/003466 Ceased WO2008086682A1 (fr) 2007-01-15 2007-12-06 Dispositif électroluminescent et lentille associée

Country Status (2)

Country Link
CN (1) CN101578478B (fr)
WO (1) WO2008086682A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009039824A3 (fr) * 2007-09-28 2009-10-15 Osram Opto Semiconductors Gmbh Composant optoélectronique et lentille de découplage pour composant optoélectronique
WO2010095441A1 (fr) * 2009-02-19 2010-08-26 シャープ株式会社 Dispositif émetteur de lumière, source de lumière plane, et dispositif d'affichage
US11094852B2 (en) 2017-08-25 2021-08-17 Cree Huizhou Solid State Lighting Company Limited Multiple LED light source lens design in an integrated package

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* Cited by examiner, † Cited by third party
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KR101382447B1 (ko) * 2012-04-12 2014-04-08 현대모비스 주식회사 자동차 조명장치의 반사장치
KR101460730B1 (ko) * 2012-04-12 2014-11-12 현대모비스 주식회사 자동차의 조명 장치

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JP2002111071A (ja) * 2000-09-28 2002-04-12 Toyoda Gosei Co Ltd 遮光反射型発光ダイオード
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JP2005190859A (ja) * 2003-12-26 2005-07-14 Toyoda Gosei Co Ltd 発光装置
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WO2009039824A3 (fr) * 2007-09-28 2009-10-15 Osram Opto Semiconductors Gmbh Composant optoélectronique et lentille de découplage pour composant optoélectronique
WO2010095441A1 (fr) * 2009-02-19 2010-08-26 シャープ株式会社 Dispositif émetteur de lumière, source de lumière plane, et dispositif d'affichage
CN102301499A (zh) * 2009-02-19 2011-12-28 夏普株式会社 发光装置、面光源以及显示装置
US8648358B2 (en) 2009-02-19 2014-02-11 Sharp Kabushiki Kaisha Light emitting device, planar light source, and display device
US11094852B2 (en) 2017-08-25 2021-08-17 Cree Huizhou Solid State Lighting Company Limited Multiple LED light source lens design in an integrated package

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