CN205447345U - Wavelength converters and light source system - Google Patents
Wavelength converters and light source system Download PDFInfo
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- CN205447345U CN205447345U CN201620156008.1U CN201620156008U CN205447345U CN 205447345 U CN205447345 U CN 205447345U CN 201620156008 U CN201620156008 U CN 201620156008U CN 205447345 U CN205447345 U CN 205447345U
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- 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
- F21K9/20—Light sources comprising attachment means
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- 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
Abstract
The utility model discloses a wavelength converters and light source system, wherein wavelength converters includes reflection of light rete (30 /), dielectric layer (20 /), fluorescent powder layer (10 /), dielectric layer (20 /), quantum dot rete (40 /) and the transmission heat conduction base plate layer (50 /) of superpose in proper order, reflection of light rete (30 /) is used for the reflection to be greater than the specific chromatic light of predetermined angle and the specific chromatic light that the transmission is lighter than predetermined angle to reflect other chromatic light, the refracting index of dielectric layer (20 /) is less than the refracting index of fluorescent powder layer (10 /), the luminous peak wavelength of quantum dot rete (40 /) is greater than the luminous peak wavelength of fluorescent powder layer (10 /). The utility model discloses a wavelength converters has light efficiency height, heat stability is good, the excitation is high characteristics.
Description
Technical field
This utility model relates to optical technical field, particularly relates to a kind of Wavelength converter and light-source system.
Background technology
Along with display and the development of lighting engineering, original halogen lamp increasingly can not meet display and illumination high power and the demand of high brightness as light source.The exciting light using solid state light emitter such as LD (LaserDiode, laser diode) to send is obtained in that the visible ray of shades of colour with the method for excitation wavelength transition material, and this technology is more and more applied in illumination and display.This technology has efficiency height, less energy consumption, low cost, the advantage of life-span length, is the preferable replacement scheme of existing white light or monochromatic light light source.Along with the development of Display Technique, people are more and more higher for the requirement of display image quality, and the color-gamut of light source is the biggest, and the display displayable color of picture is the most, closer to the natural color of object.
Fig. 1 shows the structural representation of the Wavelength converter of existing transmission mode.As it is shown in figure 1, existing Wavelength converter includes wavelength conversion material layer 10, dielectric layer 20 and 50, reflexed light film 30 and filter membranous layer 40.Wherein, wavelength conversion material layer 10 is arranged at the side of excitation source, reflexed light film 30 is arranged at the wavelength conversion material layer 10 side near excitation source, filter membranous layer 40 is arranged at the wavelength conversion material layer 10 side away from excitation source, and dielectric layer 20 and 50 is arranged between wavelength conversion material layer 10 and reflexed light film 30 and between wavelength conversion material layer 10 and filter membranous layer 40.Especially, dielectric layer 20 and 50 can be the porous material layer comprising heat-conducting medium compositions, is scattered and disappeared away by the heat that wavelength conversion layer produces in photo-conversion process, thus improves the stability of photoluminescence of this Wavelength converter.
The work process of above-mentioned Wavelength converter is: the exciting light that excitation source is launched is irradiated to wavelength conversion material layer 10 through reflexed light film 30, and excitation wavelength transition material layer 10 produces Stimulated Light；Then, Stimulated Light is irradiated on filter membranous layer 40, and the most low-angle Stimulated Light can pass through filter membranous layer 40, and the Stimulated Light of wide-angle and the exciting light do not changed are reflected back into wavelength conversion material layer 10 by filter membranous layer 40；Next, Stimulated Light and the exciting light of wide-angle are scattered to reflexed light film 30 by diffuse-reflectance effect by wavelength conversion material layer 10, and reflect back into wavelength conversion material layer 10 by reflexed light film 30, so that the exciting light do not changed secondary utilization can obtain Stimulated Light, the light extraction efficiency of Stimulated Light filtered film layer 40 also can improve simultaneously, thus improves conversion efficiency and the luminous efficiency of Wavelength converter.But the heat also making wavelength conversion material layer 10 produce increases simultaneously, although containing heat-conducting medium auxiliary heat dissipation in dielectric layer 20 and 50, but dielectric layer 20 and 50 is loose structure, its heat transfer efficiency is limited, therefore the heat of wavelength conversion material layer 10 is difficult to conduct in time, so that the brightness of the Stimulated Light of Wavelength converter generation and stability decrease.And the raising of the power along with exciting light, the heat that wavelength conversion material layer 10 produces will improve therewith so that the heat on wavelength conversion material layer is more difficult to conduct in time.Especially red light wavelength transition material, itself energy conversion efficiency is low, excitation is low, and owing to the HONGGUANG thermal efficiency under high power laser light excites is higher so that it is efficiency and stability are relatively low.For the problems referred to above, there is presently no effective solution.
Utility model content
This utility model provides a kind of Wavelength converter, and this Wavelength converter has light efficiency height, Heat stability is good, feature that excitation is high.This utility model further provides for a kind of light-source system based on Wavelength converter of the present utility model.
According to first aspect of the present utility model, this utility model provides a kind of Wavelength converter, including the reflexed light film being sequentially stacked, dielectric layer, phosphor powder layer, dielectric layer, quantum dot film layer and transmission heat-conducting substrate layer；Above-mentioned reflexed light film is less than the specific coloured light of predetermined angular for the specific coloured light and transmission reflecting greater than predetermined angular, and reflects other coloured light；The refractive index of above-mentioned dielectric layer is less than the refractive index of above-mentioned phosphor powder layer；The peak luminous wavelength of above-mentioned quantum dot film layer is more than the peak luminous wavelength of above-mentioned phosphor powder layer.
As preferred version of the present utility model, above-mentioned quantum dot film layer is that quanta point material is coated on above-mentioned transmission heat-conducting substrate layer the film layer formed that is heating and curing with liquid-state silicon gel.
As preferred version of the present utility model, above-mentioned quantum dot film layer includes red light quantum point material.
As preferred version of the present utility model, above-mentioned phosphor powder layer is fluorescent material and bonding agent sealing-in formation.
As preferred version of the present utility model, above-mentioned phosphor powder layer includes yellow fluorescent powder and/or green emitting phosphor.
As preferred version of the present utility model, above-mentioned yellow fluorescence powder material is YAG:Ce3+, M2SiO4:Eu2+At least one in (M=Ca, Sr, Ba) fluorescent material；Above-mentioned green emitting phosphor material is LuAG:Ce3+,β-Sialon:Eu2+, M2SiO4:Eu2+At least one in (M=Ca, Sr, Ba) fluorescent material；Above-mentioned quanta point material is containing the one in Cd class Quantum dots CdS e/ZnS, CdSe/CdZnS, or is without Cd class quantum dot CuInS2/ZnS.By selecting the quantum dot of different-grain diameter can obtain required HONGGUANG, gold-tinted and green glow.
As preferred version of the present utility model, above-mentioned transmission heat-conducting substrate layer is transparent sapphire, aluminum-nitride single crystal or single-crystal silicon carbide.
As preferred version of the present utility model, above-mentioned dielectric layer is air layer or the porous thermal conductive dielectric layer comprising conductive particle；Above-mentioned conductive particle is white alumina, white boron nitride, transparent sapphire granule or diamond particles.
As preferred version of the present utility model, above-mentioned transparent sapphire granule or diamond particles are granularity based on the monocrystalline sapphire granule of submicron and micron order or single-crystalline diamond.
According to second aspect of the present utility model, this utility model provides a kind of light-source system, including:
Excitation source, for producing an exciting light；
The Wavelength converter of first aspect；
The most above-mentioned exciting light enters to inject above-mentioned Wavelength converter from above-mentioned reflexed light film side, above-mentioned phosphor powder layer absorbs above-mentioned exciting light and launches the first Stimulated Light, above-mentioned quantum dot film layer absorbs the first Stimulated Light and unabsorbed exciting light and launches the second Stimulated Light, and the wavelength of the first Stimulated Light is less than the wavelength of the second Stimulated Light.
As preferred version of the present utility model, above-mentioned exciting light is blue light or ultraviolet light.
As preferred version of the present utility model, above-mentioned excitation source is laser diode or diode laser matrix.
As preferred version of the present utility model, above-mentioned reflexed light film reflects greater than the exciting light of predetermined angular, and transmission is less than the exciting light of predetermined angular, and reflects the first Stimulated Light and the second Stimulated Light.
As preferred version of the present utility model, the first Stimulated Light is gold-tinted or green glow, and the second Stimulated Light is HONGGUANG.
The Wavelength converter that this utility model provides utilizes phosphor powder layer absorb the light of short wavelength and be converted into the light of longer wavelength, the light of longer wavelength it is converted into again through quantum dot film layer, compared with existing Wavelength converter, have the advantages that heat stability is high, light efficiency is high and excitation is high.
Specifically, on the one hand, phosphor powder layer absorbs the exciting light of major part short wavelength, and its heat stability is higher, it is possible to bear the irradiation of high optical power density；And the light that its transmitting wavelength of quantum dot film layer absorptance is slightly shorter, and the spot diameter of excitation quantum point film layer is slightly larger compared with the hot spot of excitated fluorescent powder layer, and quantum dot film layer is coated on transmission heat-conducting substrate layer, compare existing air dielectric layer and porous medium layer, it is more beneficial for quickly losing heat, improve reliability further, heat effect can be greatly reduced.On the other hand, comparing existing fluorescent material, the absorption cross-section of quantum dot is bigger, almost can absorb the light that overwhelming majority phosphor powder layer sends, and transformation efficiency is higher；The persistence of quantum dot is typically in several nanoseconds, and the persistence of fluorescent material, quantum dot compared fluorescent material more difficult generation luminescent saturation, it is thus possible to realize the fluorescence of high brightness tens to hundreds of nanosecond at present；Simultaneously because quantum dot emission peak is the narrowest, can substitute for modifying sheet and use, it is thus possible to directly send the high light of excitation and the loss that do not filters.
Accompanying drawing explanation
Fig. 1 is the structural representation of the Wavelength converter of existing transmission mode；
Fig. 2 is the structural representation of the Wavelength converter of a kind of embodiment of this utility model.
Description of reference numerals:
10-wavelength conversion material layer；
20,50-dielectric layers；
30-reflexed light film；
40-filter membranous layer；
10 '-phosphor powder layer；
20 '-dielectric layer；
30 '-reflexed light film；
40 '-quantum dot film layer；
50 '-transmission heat-conducting substrate layer.
Detailed description of the invention
Combine accompanying drawing below by detailed description of the invention this utility model is described in further detail.
The structure of the Wavelength converter of a kind of embodiment of this utility model is as in figure 2 it is shown, include reflexed light film 30 ', dielectric layer 20 ', phosphor powder layer 10 ', dielectric layer 20 ', quantum dot film layer 40 ' and the transmission heat-conducting substrate layer 50 ' being sequentially stacked.Reflexed light film 30 ' is less than the specific coloured light of predetermined angular for the specific coloured light and transmission reflecting greater than predetermined angular, and reflects other coloured light.The refractive index of dielectric layer 20 ' is less than the refractive index of phosphor powder layer 10 '.Phosphor powder layer 10 ' is for being converted into, by the exciting light of acceptance, the Stimulated Light that wavelength is longer.The peak luminous wavelength of quantum dot film layer 40 ' is more than the peak luminous wavelength of phosphor powder layer 10 '.Stimulated Light that transmission heat-conducting substrate layer 50 ' sends for transmission quantum dot film layer 40 ' and heat radiation.
In Fig. 2, the refractive index of dielectric layer 20 ' is less than the refractive index of phosphor powder layer 10 ', and therefore angle of incidence can be totally reflected more than the light of critical angle on the two interface, it is to avoid light refraction also transmits from reflexed light film 30 '.Dielectric layer 20 ' can be air layer; it can also be porous thermal conductive dielectric layer; this porous thermal conductive dielectric layer can comprise white and/or colourless conductive particle, and conductive particle can be specifically white alumina, white boron nitride, transparent sapphire granule or diamond particles etc..If dielectric layer is air layer, under low optical power shooting condition, efficiency is high, but under the conditions of high excitation light power, stability of photoluminescence is poor；If dielectric layer is porous thermal conductive dielectric layer, thermal conductivity is slightly higher, and under the conditions of high excitation light power, stability of photoluminescence is preferable.
In a preferred embodiment of the present utility model, quantum dot film layer is to use quanta point material to mix coating (such as brush or spray) with liquid-state silicon gel to go up and the film layer of the formation that is heating and curing in transmission heat-conducting substrate layer 50 '.Quanta point material can be containing the one in Cd class Quantum dots CdS e/ZnS, CdSe/CdZnS, or is without Cd class quantum dot CuInS2/ZnS.By selecting the quantum dot of different-grain diameter can obtain required HONGGUANG, gold-tinted or green glow.
In a preferred embodiment of the present utility model, quantum dot film layer 40 ' is red light quantum point film layer, and it includes red light quantum point material.
In a preferred embodiment of the present utility model, phosphor powder layer 10 ' is fluorescent material and bonding agent sealing-in formation, and bonding agent can be organic silica gel or epoxy resin, glass or pottery.Fluorescent material can be the fluorescent material of Yellow light-emitting low temperature, such as YAG:Ce3+, M2SiO4:Eu2+At least one in (M=Ca, Sr, Ba) fluorescent material；Can also be the fluorescent material of green light, such as LuAG:Ce3+, β-Sialon:Eu2+, M2SiO4:Eu2+At least one in (M=Ca, Sr, Ba) fluorescent material.
In a preferred embodiment of the present utility model, transmission heat-conducting substrate layer 50 ' can be transparent sapphire, aluminum-nitride single crystal or single-crystal silicon carbide etc..Transmission heat-conducting substrate layer 50 ' plays two effects, and one is to accept quantum dot film layer 40 ', and two is quickly to be lost by the heat that quantum dot film layer 40 ' produces.
This utility model also provides for a kind of light-source system based on Wavelength converter of the present utility model, including excitation source and Wavelength converter of the present utility model, wherein excitation source is for producing an exciting light, this exciting light enters to inject Wavelength converter from reflexed light film 30 ' side, phosphor powder layer 10 ' absorbs exciting light and launches the first Stimulated Light, quantum dot film layer 40 ' absorbs the first Stimulated Light and unabsorbed exciting light and launches the second Stimulated Light, and the wavelength of the first Stimulated Light is less than the wavelength of the second Stimulated Light.
In this utility model, the wavelength of exciting light, the first Stimulated Light and the second Stimulated Light is incremented by successively.Certainly, the purposes of Wavelength converter of the present utility model is not particularly limited exciting light, the first Stimulated Light and the color of the second Stimulated Light, exciting light can be the light of the short wavelength such as blue light or ultraviolet light, first Stimulated Light can be the light of the medium wavelength such as gold-tinted or green glow, and the second Stimulated Light can be the light of the longer wavelength such as HONGGUANG or orange light.
In a preferred embodiment of the present utility model, exciting light is blue light or ultraviolet light；LASER Light Source is laser diode or diode laser matrix.
In a preferred embodiment of the present utility model, reflexed light film 30 ' reflects greater than the exciting light of predetermined angular, and transmission is less than the exciting light of predetermined angular, and reflects the first Stimulated Light and the second Stimulated Light.
In a preferred embodiment of the present utility model, quantum dot film layer 40 ' is red light quantum point film layer, and it includes red light quantum point material, for the first Stimulated Light accepted and unabsorbed exciting light are converted into HONGGUANG.Specifically, blue light or ultraviolet laser incide phosphor powder layer 10 ' through reflexed light film 30 ' and send the first Stimulated Light of longer wavelength, and then the first Stimulated Light and unabsorbed blue light or ultraviolet laser are absorbed by red light quantum point film layer, launch HONGGUANG.Wherein, the emission wavelength of phosphor powder layer 10 ' is shorter than the red light wavelength of red light quantum point, and the first Stimulated Light can be gold-tinted or green glow, and the HONGGUANG that quantum dot film layer 40 ' sends is gone out eventually through transmission heat-conducting substrate layer 50 ' transmission.Reflexed light film 30 ' is angular selectivity filter coating, reflects greater than blue light or the ultraviolet light of predetermined angular, and transmission is less than blue light or the ultraviolet light of predetermined angular, and reflects green glow, gold-tinted and HONGGUANG.
Phosphor powder layer 10 ' absorbs the exciting light of major part short wavelength, and its heat stability is higher, it is possible to bear the irradiation of high optical power density.
In this utility model, the fluorescence that its transmitting wavelength of quantum dot film layer absorptance is slightly shorter, and owing to the spot diameter of excitation quantum point layer is slightly larger compared with the hot spot of excitated fluorescent powder, and quantum dot layer is coated on transmission heat-conducting substrate layer, compare existing air dielectric layer and porous medium layer, it is more beneficial for quickly losing heat, improves reliability further, so this application mode can greatly reduce heat effect.Additionally, compare existing red fluorescence powder, the absorption cross-section of red light quantum point is bigger, almost can absorb the fluorescence that overwhelming majority fluorescent material sends, and transformation efficiency is higher；Further, the persistence of quantum dot is typically in several nanoseconds, and at present the persistence of fluorescent material, quantum dot compared that fluorescent material is more difficult realizes luminescent saturation tens to hundreds of nanosecond, it is thus possible to realize the fluorescence of high brightness.Simultaneously because quanta point material emission peak is the narrowest, can substitute for modifying sheet and use, it is thus possible to directly send excitation HONGGUANG and the loss that do not filters.
It should be noted that preferred embodiment above is only that to convert blue light into HONGGUANG be structure and the principle having illustrated Wavelength converter of the present utility model.Those skilled in the art can obtain the Wavelength converter of other modification based on spirit of the present utility model, is respectively used to realize the conversion of other kinds of light.
Above content is to combine specific embodiment further detailed description of the utility model, it is impossible to assert that of the present utility model being embodied as is confined to these explanations.For this utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, it is also possible to make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (10)
1. a Wavelength converter, it is characterised in that include reflexed light film (30 '), dielectric layer (20 '), phosphor powder layer (10 '), dielectric layer (20 '), quantum dot film layer (40 ') and transmission heat-conducting substrate layer (50 ') being sequentially stacked；Described reflexed light film (30 ') is less than the specific coloured light of predetermined angular for the specific coloured light and transmission reflecting greater than predetermined angular, and reflects other coloured light；The refractive index of described dielectric layer (20 ') is less than the refractive index of described phosphor powder layer (10 ')；The peak luminous wavelength of described quantum dot film layer (40 ') is more than the peak luminous wavelength of described phosphor powder layer (10 ').
Wavelength converter the most according to claim 1, it is characterised in that described quantum dot film layer (40 ') includes red light quantum point material.
Wavelength converter the most according to claim 1, it is characterised in that described phosphor powder layer (10 ') includes yellow fluorescent powder and/or green emitting phosphor.
Wavelength converter the most according to claim 1, it is characterised in that described transmission heat-conducting substrate layer (50 ') is transparent sapphire, aluminum-nitride single crystal or single-crystal silicon carbide.
Wavelength converter the most according to claim 1, it is characterised in that described dielectric layer (20 ') is air layer or the porous thermal conductive dielectric layer comprising conductive particle；Described conductive particle is white alumina, white boron nitride, transparent sapphire granule or diamond particles.
6. a light-source system, it is characterised in that described light-source system includes:
Excitation source, for producing an exciting light；
Wavelength converter described in any one of claim 1-5；
Wherein said exciting light enters to inject described Wavelength converter from described reflexed light film (30 ') side, described phosphor powder layer (10 ') absorbs described exciting light and launches the first Stimulated Light, described quantum dot film layer (40 ') absorbs described first Stimulated Light and unabsorbed exciting light and launches the second Stimulated Light, and the wavelength of described first Stimulated Light is less than the wavelength of described second Stimulated Light.
Light-source system the most according to claim 6, it is characterised in that described exciting light is blue light or ultraviolet light.
8., according to the light-source system described in claim 6 or 7, it is characterised in that described reflexed light film (30 ') reflects greater than the exciting light of predetermined angular, transmission is less than the exciting light of predetermined angular, and reflects described first Stimulated Light and the second Stimulated Light.
9., according to the light-source system described in claim 6 or 7, it is characterised in that described first Stimulated Light is gold-tinted or green glow, described second Stimulated Light is HONGGUANG.
Light-source system the most according to claim 6, it is characterised in that described excitation source is laser diode or diode laser matrix.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620156008.1U CN205447345U (en) | 2016-03-01 | 2016-03-01 | Wavelength converters and light source system |
| PCT/CN2017/074959 WO2017148344A1 (en) | 2016-03-01 | 2017-02-27 | Wavelength conversion device and light source system |
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| CN201620156008.1U CN205447345U (en) | 2016-03-01 | 2016-03-01 | Wavelength converters and light source system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017148344A1 (en) * | 2016-03-01 | 2017-09-08 | 深圳市绎立锐光科技开发有限公司 | Wavelength conversion device and light source system |
| WO2019006979A1 (en) * | 2017-07-05 | 2019-01-10 | 深圳市光峰光电技术有限公司 | Wavelength conversion device and laser fluorescence conversion type light source |
| WO2019006980A1 (en) * | 2017-07-05 | 2019-01-10 | 深圳市光峰光电技术有限公司 | Wavelength conversion device, and light source employing conversion of laser light to fluorescent light |
| WO2019061818A1 (en) * | 2017-09-26 | 2019-04-04 | 深圳光峰科技股份有限公司 | Wavelength conversion device and light emitting device |
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| CN105276525A (en) * | 2014-07-09 | 2016-01-27 | 深圳市绎立锐光科技开发有限公司 | Wavelength conversion device and light source system |
| CN205447345U (en) * | 2016-03-01 | 2016-08-10 | 深圳市绎立锐光科技开发有限公司 | Wavelength converters and light source system |
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| WO2017148344A1 (en) | 2017-09-08 |
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