CN102720954A - Light emitting device and light emitting system - Google Patents
Light emitting device and light emitting system Download PDFInfo
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- CN102720954A CN102720954A CN2012100382172A CN201210038217A CN102720954A CN 102720954 A CN102720954 A CN 102720954A CN 2012100382172 A CN2012100382172 A CN 2012100382172A CN 201210038217 A CN201210038217 A CN 201210038217A CN 102720954 A CN102720954 A CN 102720954A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
- F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
- F21V9/38—Combination of two or more photoluminescent elements of different materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
- F21V13/12—Combinations of only three kinds of elements
- F21V13/14—Combinations of only three kinds of elements the elements being filters or photoluminescent elements, reflectors and refractors
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- 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
- F21Y2113/00—Combination of light sources
- F21Y2113/10—Combination of light sources of different colours
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- 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
- F21Y2113/00—Combination of light sources
- F21Y2113/20—Combination of light sources of different form
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Abstract
The invention provides a light emitting device and a light emitting system. The light emitting device includes an LED (light emitting diode) used for emitting first light, and the LED includes a light emitting surface and an excitation light source which is used for emitting excitation light. The light emitting device further includes a wavelength conversion layer coating the LED, and the wavelength conversion layer cannot be excited by the first light and can be excited by the excitation light and emit second light at the same time. The light emitting device further includes a light path dividing device, which is arranged between the light paths of the wavelength conversion layer and the excitation light source, and is used for introducing the excitation light to enter the wavelength conversion layer, introducing the light path of mixed light going out from the wavelength conversion layer to be separated from the light path of the excitation light, and forming emergent light of the light emitting device, wherein the mixed light includes the first light and the second light. According to the light emitting device and the light emitting system provided by the invention, by utilizing the light reflection effect of the LED, the first light emitted by the LED and the second light generated by the wavelength conversion layer coating the LED are shared, and meanwhile the light emitting area of the light source is not enlarged.
Description
Technical field
The present invention relates to optical technical field, particularly relate to light-emitting device and luminescent system.
Background technology
At present semiconductor lighting more and more receives people's attention, and the monochromatic light light source that wherein can launch such as RGB light etc. has a wide range of applications in Projection Display, decor illumination.
At present; Mainly there are two kinds in the technology path of realizing the monochromatic light light source; First kind is to use single color LED (LED; Light emitting diode) directly produce each monochromatic light, second kind is to use blue light or UV LED to excite each monochromatic fluorescent material to produce monochromatic light, and these two kinds of methods respectively have superiority.The monochromatic light ray spectral width that LED produces is less, and is therefore bright-colored beautiful, but its problem is that efficient is relatively low; And the monochromatic efficient that fluorescent material produces is higher, but because spectral width seems to be difficult to satisfactory than its glow color of ambassador.For example, represented the comparison of luminescent spectrum 702 of luminescent spectrum 701 and a kind of red fluorescence powder of red-light LED among Fig. 7.
A solution is to use monochromatic LED and homochromy fluorescent material light source simultaneously, the advantages of the two is got up the realization comprehensive performance.Yet as can beappreciated from fig. 7, because color is approaching, there is bigger overlapping in the luminescent spectrum of monochromatic LED and homochromy fluorescent material, and it is a branch of therefore can't to use splicer spares such as interferometric filter commonly used to utilize the difference of two kinds of light wavelengths to merge into.Therefore if want to realize that two kinds of light use jointly; Two kinds of light sources must be arranged side by side; This must increase the light-emitting area of light source and the diameter of section of light beam, and then significantly reduces the energy density of light beam, and this is difficult to accept for fields such as Projection Display and projection illumination.
Therefore, need a kind of light-emitting device, under the prerequisite of the light-emitting area that does not enlarge light emitting source, realize the shared of homochromy LED and light-emitting phosphor.
Summary of the invention
The technical problem underlying that the present invention solves provides and makes homochromy light emitting diode and fluorescent material can under the prerequisite of the light-emitting area that does not enlarge light emitting source, realize shared light-emitting device and luminescent system.
The present invention proposes a kind of light-emitting device, comprises at least one light emitting diode that is used to launch first light, and this light emitting diode comprises light-emitting area and is used to launch the excitation source of exciting light.Also comprise the wavelength conversion layer on the light-emitting area that is coated in light emitting diode, this wavelength conversion layer can not be excited by first light, can be excited optical excitation and launch second light of this wavelength conversion layer simultaneously.This light-emitting device also comprises the light path discriminating device between the light path of wavelength conversion layer and excitation source; Be used for exciting light guiding is incident in this wavelength conversion layer, guide the emergent light that separates and form light-emitting device from the partially mixed at least light of this wavelength conversion layer outgoing and the light path of the exciting light that is incident in this wavelength conversion layer simultaneously.Mixed light comprises first light and second light.
The present invention also proposes a kind of luminescent system; Comprise above-mentioned light-emitting device; Also comprise driving control device; This driving control device is used for independently controlling the light emitting diode and the excitation source of light-emitting device, and then the luminous flux of realizing first light and second light in the emergent light of the luminescent system purpose of independent control respectively.
In light-emitting device of the present invention and luminescent system; Utilize the reflex of light emitting diode self to light; Second light that first light of having realized this light emitting diode emission and the wavelength conversion layer that is coated in this LED surface produce shared do not enlarge the light-emitting area of light source simultaneously.
Description of drawings
Fig. 1 is the sketch map of the first embodiment of the present invention;
Fig. 1 a is the sketch map of a variant embodiment of the first embodiment of the present invention;
Fig. 2 is the sketch map of the second embodiment of the present invention;
Fig. 3 is the sketch map of the third embodiment of the present invention;
Fig. 4 is the sketch map of the fourth embodiment of the present invention;
Fig. 5 is the sketch map of the fifth embodiment of the present invention;
Fig. 6 is the sketch map of the sixth embodiment of the present invention;
Fig. 7 be red LED luminescent spectrum and a kind of red fluorescence powder emission spectrum for example.
The specific embodiment
The structure of the first embodiment of the present invention is as shown in Figure 1.Light-emitting device 100 comprises the light emitting diode 101 that is used to launch first light 111, and this light emitting diode 101 comprises light-emitting area 101a; Also comprise the excitation source 105 that is used to launch exciting light 113.The light-emitting area 101a of light emitting diode 101 is provided with wavelength conversion layer 103, and this wavelength conversion layer 103 can not be excited by first light 111, and this wavelength conversion layer light 113 that can be excited excites and launches second light 115 simultaneously.This light-emitting device 100 also comprises the light path discriminating device 107 between the light path of wavelength conversion layer 103 and excitation source 105; This light path discriminating device 107 is used for exciting light 113 guiding are incident in wavelength conversion layer 103; Guide the emergent light that separates and form light-emitting device from the partially mixed at least light of these wavelength conversion layer 103 outgoing and the light path of the exciting light that is incident in this wavelength conversion layer 113 simultaneously, wherein mixed light comprises first light 111 and second light 115.
Use the present invention, can realize like said luminous shared of homochromy light emitting diode and material for transformation of wave length under the prerequisite that does not enlarge the light source luminescent area in the background technology.Concrete operation principle is following:
In the present invention, light emitting diode 101 is incident in wavelength conversion layer 103 earlier from first light 111 that its light-emitting area 101a sends.Because wavelength conversion layer 103 can not excite by first light 111, so 103 pairs first light 111 of this wavelength conversion layer do not absorb or small absorption are only arranged.Part in first light 111 can also form emergent lights through light path discriminating device 107 by this wavelength conversion layer 103 of direct transmission; Remaining part can be by wavelength conversion layer 103 reflected back light emitting diodes 101; And be incident in wavelength conversion layer 103 once more after being reflected once more by light emitting diode 101; Center beam split energy transmission rest light energy is reflected back toward light emitting diode once more; So after the circulation, light emitting diode 101 sends first light 111 and finally is able to from wavelength conversion layer 103 outgoing, and forms emergent light through light path discriminating device 107 backs.
Simultaneously, wavelength conversion layer 103 is excited and stimulated emission second light 115 by the exciting light 113 through 107 guiding of light path discriminating device.Directly to the heteropleural emission of light emitting diode 101, this part light forms emergent light through light path discriminating device 107 backs to a part in second light; Another part can incide light emitting diode 101 inside; And be incident in wavelength conversion layer 103 after light emitting diode 101 reflections; Center beam split energy transmission rest light energy is reflected back toward light emitting diode once more; So after the circulation, second light 115 finally is able to from wavelength conversion layer 103 outgoing, and forms emergent light through light path discriminating device 107 backs.
In sum; The present invention utilizes the reflex of light emitting diode self to light; Second light that first light of having realized this light emitting diode emission and the wavelength conversion layer that is coated in this LED surface produce shared, light-emitting area is with the light-emitting area of light emitting diode identical simultaneously.
What be worth explanation is; Light emitting diode has reflex to light; This is because light emitting diode inside has the reflecting layer, thereby this reflecting layer is used for the support or oppose light of surface launching of the luminescent layer of light emitting diode is reflected the light that makes light emitting diode to the front and all goes out to shoot out from its light-emitting area.The luminosity that this can improve light emitting diode greatly belongs to prior art.
In the present invention, wavelength conversion layer is arranged on the light-emitting area of light emitting diode, and this also is existing technology, has multiple mode to realize.For example with material for transformation of wave length with after binding agent mixes; Use method of printing to be coated in LED surface and form wavelength conversion layer, for example material for transformation of wave length is mixed the back with liquid solvent again and be sprayed on LED surface formation wavelength conversion layer with spray gun.
In the light-emitting device 100 of present embodiment, also comprise condenser lens 109, it is used for exciting light 113 is focused on wavelength conversion layer 103, is used to collect first light 111 and second light 115 simultaneously and with its collimation.The use of condenser lens 109 can improve system effectiveness in the light-emitting device, is a kind of embodiment of optimization.
In the present invention, light path discriminating device 107 is used for the mixed light that comprises first light 111 and second light 115 and the light path of exciting light 113 are separated, and prevents that this mixed light directly is incident in excitation source 105 and causes loss.In the present embodiment; The light path discriminating device is an interferometric filter; This interferometric filter 107 comprises that with the reflection way guiding mixed light of first light 111 and second light 115 forms the emergent light of light-emitting device 100, is incident in the surface of wavelength conversion layer 103 simultaneously with the mode guiding exciting light 113 of transmission.
Specifically for instance; Light emitting diode 101 is a red light-emitting diode; Excitation source 105 is blue light or UV LED light source or blue light or ultraviolet laser diode light source; Wavelength conversion layer 103 comprises the red wavelength transition material, its blue light or ultraviolet excitation that light source sends that can be excited.The red wavelength transition material is excited to produce ruddiness, can know according to the operation principle of material for transformation of wave length, and it can not be excited by the ruddiness that red light-emitting diode produces.At this moment, blue light or ultraviolet light that interferometric filter 107 transmission excitation sources 105 send reflect ruddiness first light 111 of light emitting diode 101 emissions and ruddiness second light 115 of wavelength conversion layer 103 emissions simultaneously.
In this example, wavelength conversion layer 103 can also comprise the yellow wavelengths transition material, this material stimulated emission gold-tinted; Because the wavelength ratio ruddiness of gold-tinted is short, so this yellow wavelengths transition material can not be excited by the ruddiness of light emitting diode 101 emissions.At this moment, blue light or ultraviolet light that interferometric filter 107 transmission excitation sources 105 send reflect ruddiness first light 111 of light emitting diode 101 emissions and gold-tinted second light 115 of wavelength conversion layer 103 emissions simultaneously.
What be worth explanation is, above-mentionedly the present invention is not constituted restriction for example.
In the present embodiment, interferometric filter 107 can also comprise first light 111 and second light, 115 mixed lights in the reflecting part, does the purpose that can reach adjustment mixed light luminescent spectrum like this.For example combine two kinds of red-light spectrum shown in Figure 7; Some above spectral components of 107 reflections of optical filter, 600 nanometers that relate to; Then the spectrum 701 of red light-emitting diode is almost become the emergent light of light-emitting device by whole reflections; The spectral component of the inclined to one side yellow in the luminescent spectrum 702 of red wavelength conversion layer below 600 nanometers then can transmission interference filter 107 and can not become emergent light, only just can be reflected greater than the spectral component of 600 nanometers and becomes emergent light.So just make that the color of ruddiness of mixing of outgoing is more bright-coloured.
In the present embodiment; As previously mentioned, the intensity of first light 111 in the emergent light of light-emitting device 100 is decided by the luminous intensity of light emitting diode 101, and the luminous intensity of second light 115 is decided by the luminous intensity of excitation source 105 simultaneously; Therefore further; The present invention also proposes a kind of luminescent system, and this luminescent system comprises above-mentioned light-emitting device, also comprises driving control device; This driving control device is used for independently controlling the light emitting diode 101 and excitation source 105 of light-emitting device, and then the luminous flux of realizing first light 111 and second light 115 in the emergent light of this luminescent system purpose of independent control respectively.What be worth explanation is that this luminescent system also can comprise the light-emitting device of following embodiment exemplified.
The luminous flux of realizing first light 111 and second light 115 in the emergent light beneficial effect of independent control respectively is following: according to described in the background technology; First light of light emitting diode emission is different with the color of second light of wavelength conversion layer emission; Therefore both powers of independent regulation can obtain the color of different mixed lights; And when two kinds of light can be mixed into white light, adjusting power between the two then can obtain the colour temperature of different white lights.
Control light emitting diode 101 has much with the method for the luminous intensity of excitation source 105; For example control its size of current, or when pulsed drive, control its dutycycle, even can control light emitting diode 101 and alternately light with excitation source 105; This belongs to prior art, does not give unnecessary details here.
Also there is a distortion in present embodiment, and its structure is shown in Fig. 1 a.Different with embodiment shown in Figure 1 is, also comprises light source 106 in this distortion, and the light 117 of its emission can pass through the emergent light of this light-emitting device of light path discriminating device 107 guiding becoming.In this distortion; Light emitting diode is a red light-emitting diode; Wavelength conversion layer comprises yellow or yellow green material for transformation of wave length; Light source 106 is blue light-emitting diode or blue laser light source, therefore in the emergent light of this light-emitting device, comprises the composition of blue light, gold-tinted or green-yellow light and ruddiness simultaneously, and the white light that forms like this has higher colour rendering index.Same, light emitting diode, excitation source and light source 106 all can independently be controlled, with the adjusting of the chromaticity coordinates of realization outgoing white light.
In the present embodiment, the light 117 of light source 106 emission is through light path discriminating device 107 and the emergent light of light-emitting device jointly that mixes behind the actinic light that comprises first light and second light.This is a kind of preferred embodiment, and it has succinct structure; In fact the light 117 of light source 106 emission also can be otherwise with mix actinic light, for example a beam split optical filter is set and closes light in the light path rear end of light path discriminating device 107.
In the present embodiment, light path discriminating device 107 transmission exciting lights 113, the while is partial reflection first light 111 and second light 115 at least; It is understandable that light path discriminating device 107 is part transmission first light 111 and second light 115 at least also, reflects exciting light 113 simultaneously, this can realize the effect that the light path with first light 111 and second light 115 and exciting light 113 is separated equally.
Light-emitting device in the present embodiment comprises a light emitting diode; In fact can comprise many light emitting diodes; These light emitting diodes form an array; Spacing between the light emitting diode that each light emitting diode is adjacent is very little, makes that the light-emitting area of each light emitting diode in this light emitting diode matrix is common to constitute an area source.In general, in such array, the spacing between the light emitting diode that each light emitting diode is adjacent is less than 50% of the circumscribed circle diameter of the light-emitting area of light emitting diode.
Light-emitting device in the first embodiment of the present invention has used interferometric filter as the light path discriminating device.In fact can also there be other mode to realize the function of light path discriminating device, illustrates respectively among second to the 6th embodiment below.What be worth explanation is that the characteristic among first embodiment is described and is equally applicable to for example among the following embodiment, therefore no longer repeat specification in the following description.
The structure of the second embodiment of the present invention is as shown in Figure 2.In light-emitting device 200; Light path discriminating device 207 is a speculum; These speculum 207 reflection exciting lights 213 make it be incident in wavelength conversion layer 203, comprise that simultaneously the mixed light of first light 211 and second light 215 forms the emergent light of light-emitting device 200 from the outgoing all around of this speculum 207.
Different with first embodiment is that in the present embodiment, mixed light comprises also that by the absorbed residual excitation light 217 that do not have of wavelength conversion layer 203 reflections this part light also can form the emergent light of light-emitting device 200 from outgoing around the speculum 207.When light emitting diode is a red light-emitting diode; Excitation source is a blue light source; When wavelength conversion layer comprises yellow or yellow green material for transformation of wave length; Just comprised the composition of blue light, gold-tinted or green-yellow light and ruddiness in the emergent light of the light-emitting device of present embodiment simultaneously, compared that the light-emitting device in the present embodiment need not increase the white light that another blue light source just can be realized high color rendering index (CRI) with first embodiment.Following embodiment compares with first embodiment all has this advantage.
The shortcoming of present embodiment is, understands some surface that is incident in speculum 207 in the mixed light and the formation loss that is reflected.As long as speculum 207 is enough little, the energy of this part light just can be ignored; As long as therefore in practical application, can effectively reflect exciting light to wavelength conversion layer, the size of this speculum is more little good more.
The structure of the third embodiment of the present invention is as shown in Figure 3.In light-emitting device 300, the light path discriminating device is the reflection unit 307 of band through hole, and this reflection unit 307 comprises through hole and this through hole 307a reflecting surface on every side.Exciting light 313 passes through hole 307a and is incident in wavelength conversion layer 303, and the mixed light that comprises first light 311 and second light 315 is by the emergent light of reflection of the reflecting surface around this through hole and formation light-emitting device 300.In the present embodiment, mixed light also comprises by the absorbed residual excitation light 317 that do not have of wavelength conversion layer 303 reflections.
What be worth explanation is, has sub-fraction in the mixed light and can pass the through hole 307a of reflection unit 307 and can not be reflected into and be emergent light, as long as therefore can guarantee passing of exciting light 313, the size of through hole 307a is more little good more.In real work, the loss of this part light is negligible often.
In the present embodiment, the shape of the reflection unit 307 of band through hole is the plane, and in the of the present invention the 4th and the 5th embodiment, the shape of this reflection unit is an arc.
The structure of the fourth embodiment of the present invention is as shown in Figure 4.In this embodiment; The reflection unit 407 of band through hole is a paraboloidal; Different with the 3rd embodiment is, mixed light focuses on this paraboloidal focus after inciding this reflection unit 407, and this utilization for follow-up light source luminescent is helpful in some application scenario.
The structure of the fifth embodiment of the present invention is as shown in Figure 5.In this embodiment; The reflection unit 507 of band through hole is a hemispherical; Light emitting diode 501 with and light-emitting area on wavelength conversion layer 503 be positioned at this hemispheric centre of sphere near; And after the mixed light that this wavelength conversion layer 503 goes out to shoot out is reflected by the reflecting surface around the through hole, focusing on the emergent light that one point union forms light-emitting device 500, the position of the placement of this focus point and light emitting diode 501 is about this hemispheric centre of sphere symmetry.
Preferably, the light-emitting device 500 in the present embodiment also comprises light collecting device 508, and this light collecting device 508 is used to collect the emergent light after the focusing.In the present embodiment, light collecting device 508 is collecting lenses, and in fact it can also have other form, for example integrating rod or taper integrating rod.This is a prior art, does not give unnecessary details here.
The reflection unit 507 of the band through hole in the light-emitting device of present embodiment can also be a semielliptical shape; This moment light emitting diode 501 with and light-emitting area on wavelength conversion layer 503 be positioned on the focus of this semielliptical shape, and the mixed light that goes out to shoot out from wavelength conversion layer 503 focuses on another focus of this half ellipsoidal surface after by the reflection of the reflecting surface around the through hole.
The reflection unit that is appreciated that the band through hole in conjunction with the 4th and the 5th embodiment can be a variety of arc-shaped curved surfaces, is not limited to above giving an example.
The structure of the sixth embodiment of the present invention is as shown in Figure 6.The shape of the reflection unit 607 of band through hole is stepped.In fact, this stair-stepping profile is made up of two parts curved surface 607a and 607b.This two parts curved surface is respectively the part of two concentric spheres or confocal ellipsoid; In conjunction with the 5th embodiment be appreciated that mixed light through reflection post-concentration Jiao of this two parts curved surface in same position.
The above is merely embodiments of the invention; Be not so limit claim of the present invention; Every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (13)
1. a light-emitting device is characterized in that, comprising:
At least one light emitting diode that is used to launch first light, this light emitting diode comprises light-emitting area;
Be used to launch the excitation source of exciting light;
Be arranged on the wavelength conversion layer on the light-emitting area of light emitting diode, this wavelength conversion layer can not be excited by said first light, and this wavelength conversion layer can and be launched second light by said excitation simultaneously;
Light path discriminating device between the light path of said wavelength conversion layer and said excitation source; Be used for said exciting light guiding is incident in this wavelength conversion layer; Guide the emergent light that separates and form light-emitting device from the partially mixed at least light of this wavelength conversion layer outgoing and the light path of the exciting light that is incident in this wavelength conversion layer simultaneously, said mixed light comprises first light and second light.
2. light-emitting device according to claim 1 is characterized in that, said first light is ruddiness.
3. light-emitting device according to claim 2 is characterized in that, said wavelength conversion layer comprises one or more in red wavelength transition material, yellow wavelengths transition material, green wavelength transition material and the blue wavelength transition material.
4. light-emitting device according to claim 1 is characterized in that, said first light is green glow.
5. light-emitting device according to claim 4 is characterized in that, said wavelength conversion layer comprises one or more in yellow wavelengths transition material, green wavelength transition material and the blue wavelength transition material.
6. light-emitting device according to claim 1 is characterized in that, said light path discriminating device comprises interferometric filter; This interferometric filter to mixed light at least the part transmission simultaneously to exciting light reflection, or to the exciting light transmission simultaneously to mixed light partial reflection at least.
7. light-emitting device according to claim 6 is characterized in that, also comprises the primary light source that is used to launch the 3rd light, and the 3rd light and said mixed light constitute the emergent light of light-emitting device jointly.
8. light-emitting device according to claim 1; It is characterized in that; Said light path discriminating device comprises speculum; This mirror reflects exciting light makes it be incident in wavelength conversion layer, at least partly forms the emergent light of light-emitting device simultaneously from the outgoing all around of this speculum from the mixed light of wavelength conversion layer outgoing.
9. light-emitting device according to claim 1 is characterized in that, said light path discriminating device comprises the reflection unit of being with through hole, and this reflection unit comprises through hole and this through hole reflecting surface on every side; Said exciting light passes through hole and is incident in wavelength conversion layer, is reflected and form the emergent light of light-emitting device by the reflecting surface around this through hole from the partially mixed at least light of wavelength conversion layer outgoing.
10. according to Claim 8 or 9 described light-emitting devices, it is characterized in that said mixed light also comprises by the absorbed residual excitation light that do not have of wavelength conversion layer reflection.
11. light-emitting device according to claim 9 is characterized in that, the reflection unit of said band through hole be shaped as plane, arc or stepped.
12. light-emitting device according to claim 1; It is characterized in that; Said at least one light emitting diode forms an array, and the spacing between the light emitting diode that each light emitting diode is adjacent is less than 50% of the circumscribed circle diameter of the said light-emitting area of light emitting diode.
13. luminescent system; It is characterized in that; Comprise any described light-emitting device in the claim 1 to 12; Also comprise driving control device, this driving control device is used for independently controlling the light emitting diode and the excitation source of light-emitting device, and then the luminous flux of realizing first light and second light in the emergent light of the luminescent system purpose of independent control respectively.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210038217.2A CN102720954B (en) | 2012-01-14 | 2012-02-20 | Light emitting device and light emitting system |
| PCT/CN2012/084923 WO2013104211A1 (en) | 2012-01-14 | 2012-11-20 | Light emitting device and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210011262.9 | 2012-01-14 | ||
| CN201210011262 | 2012-01-14 | ||
| CN201210038217.2A CN102720954B (en) | 2012-01-14 | 2012-02-20 | Light emitting device and light emitting system |
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| CN102720954A true CN102720954A (en) | 2012-10-10 |
| CN102720954B CN102720954B (en) | 2014-08-27 |
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