CN105301878B - Wavelength converter and preparation method thereof, related lighting fixtures and optical projection system - Google Patents

Wavelength converter and preparation method thereof, related lighting fixtures and optical projection system Download PDF

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Publication number
CN105301878B
CN105301878B CN201410341637.7A CN201410341637A CN105301878B CN 105301878 B CN105301878 B CN 105301878B CN 201410341637 A CN201410341637 A CN 201410341637A CN 105301878 B CN105301878 B CN 105301878B
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conversion layer
wavelength conversion
inorganic
organic
light
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CN201410341637.7A
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CN105301878A (en
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许颜正
陈雨叁
王艳刚
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深圳市光峰光电技术有限公司
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Abstract

The present invention provides a kind of Wavelength converter and preparation method thereof, related lighting fixtures and optical projection system, including:Inorganic wavelength conversion layer comprising inorganic cementitious material and first wave length transition material, for absorbing exciting light and producing the first stimulated light;Organic wavelength conversion layer on one surface of inorganic wavelength conversion layer is stacked and placed on, organic wavelength conversion layer includes organic binding material and second wave length transition material, for absorbing first stimulated light and producing the second stimulated light;Organic wavelength conversion layer is bonded connection with the inorganic wavelength conversion layer.Compared with second wave length transition material directly absorbs the mode that exciting light produces the second stimulated light, the heat that inorganic wavelength conversion layer and organic wavelength conversion layer in the present invention produce is less, the temperature of Wavelength converter is relatively low, and the light efficiency of the second stimulated light of acquisition is higher.

Description

Wavelength converter and preparation method thereof, related lighting fixtures and optical projection system

Technical field

The present invention relates to technical field of laser display, more specifically to a kind of Wavelength converter and its preparation side Method, related lighting fixtures and optical projection system.

Background technology

Existing semiconductor light source optical projection system, the exciting light that the light sources such as light emitting diode or laser diode are launched is entered It is mapped on the different wavelength conversion material of Wavelength converter, generation wavelength is more than the different colours of the wavelength of the exciting light Then different colours are excited photosynthesis light beam by stimulated light, such as red stimulated light, green stimulated light and blue stimulated light Afterwards, the display of projected image is carried out.

During above-mentioned wavelength conversion material absorbs exciting light and produces stimulated light, and not all energy is all inhaled Receive and be converted to stimulated light, but a portion energy has been distributed as heat and gone out, so that wavelength conversion material Temperature it is higher, influence the light efficiency of the service life of wavelength conversion material and the stimulated light of generation.Also, wavelength conversion material turns Changing that efficiency is lower, the heat of generation is more, wherein, the transfer efficiency of the wavelength conversion material of red stimulated light is minimum.

With continuous improvement of the people to projected picture brightness requirement, the luminous power of exciting light is higher and higher, wavelength convert The temperature of material and Wavelength converter is also constantly riseing, and therefore, how to reduce wavelength conversion material and Wavelength converter Temperature, lift the light efficiency of stimulated light, have become one of industry technical bottleneck urgently to be resolved hurrily.

The content of the invention

In view of this, the present invention provides a kind of Wavelength converter and preparation method thereof, related lighting fixtures and projection System, to reduce the temperature of wavelength conversion material and Wavelength converter, lifts the light efficiency of stimulated light.

To achieve the above object, the present invention provides following technical solution:

A kind of Wavelength converter, including:

Inorganic wavelength conversion layer comprising inorganic cementitious material and first wave length transition material, for absorbing exciting light and producing Raw first stimulated light;

Organic wavelength conversion layer on one surface of inorganic wavelength conversion layer is stacked and placed on, organic wavelength conversion layer includes Organic binding material and second wave length transition material, for absorbing first stimulated light and producing the second stimulated light;

Organic wavelength conversion layer is bonded connection with the inorganic wavelength conversion layer.

Preferably, the second wave length transition material is additionally operable to absorb exciting light and produces the 3rd stimulated light.

Preferably, further include:

The first optical diaphragm positioned at surface of the inorganic wavelength conversion layer away from organic wavelength conversion layer, is used for Transmit the exciting light and reflect first stimulated light.

Preferably, further include:

The second optical diaphragm positioned at surface of the organic wavelength conversion layer away from the inorganic wavelength conversion layer, is used for Reflect first stimulated light and transmit second stimulated light.

Preferably, the inorganic cementitious material is glass dust, and the first wave length transition material is yellow fluorescent powder;It is described Organic binding material is silica gel or epoxy resin, and the second wave length transition material is red fluorescence powder.

Preferably, the thickness range of the inorganic wavelength conversion layer is 90 μm~110 μm;Organic wavelength conversion layer Thickness range is 60 μm~70 μm.

A kind of Wavelength converter preparation method, including:

Step 1:Inorganic wavelength conversion layer is prepared using inorganic cementitious material and first wave length transition material;

Step 2:Organic bonding material and second wave length transition material are used on a surface of the inorganic wavelength conversion layer Organic wavelength conversion layer is formed, makes to be bonded connection between organic wavelength conversion layer and inorganic wavelength conversion layer.

Preferably, the process in step 2 is:

By the way of precipitation deposits organic wavelength conversion layer is formed on a surface of the inorganic wavelength conversion layer.

Preferably, the mode of the precipitation deposition is specially:

The inorganic wavelength conversion layer is placed on inside container;

The advance prepared silane coupling agent hydrating solution with second wave length transition material is poured into the container;

After silane coupling agent hydrating solution precipitation, deposition, a surface of the inorganic wavelength conversion layer formed with Machine wavelength conversion layer.

A kind of Wavelength converter, including at least the first subregion and the second subregion, wherein, first subregion includes stacking The inorganic wavelength conversion layer and organic wavelength conversion layer for setting and being mutually bonded, the inorganic wavelength conversion layer include inorganic bond Material and first wave length transition material, for absorbing exciting light and producing the first stimulated light;Organic wavelength conversion layer includes Organic binding material and second wave length transition material, for absorbing first stimulated light and producing the second stimulated light;

Second subregion includes inorganic cementitious material and the 3rd wavelength conversion material, for absorbing exciting light and producing not It is same as the 3rd stimulated light of the second stimulated light.

A kind of light-emitting device, including Wavelength converter as described above.

A kind of optical projection system, including light-emitting device as described above.

Compared with prior art, technical solution provided by the present invention has the following advantages:

Optical projection system provided by the present invention, light-emitting device, Wavelength converter and preparation method thereof, inorganic wavelength convert After layer absorbs exciting light and produces the first stimulated light, organic wavelength conversion layer absorbs first stimulated light and produces second and is excited Light, second be higher than due to the transfer efficiency of the first wave length transition material in inorganic wavelength conversion layer in organic wavelength conversion layer Wavelength conversion material, therefore, compared with second wave length transition material directly absorbs the mode that exciting light produces the second stimulated light, this The heat that inorganic wavelength conversion layer and organic wavelength conversion layer in invention produce is less, and the temperature of Wavelength converter is relatively low, The light efficiency of the second stimulated light obtained is higher.

Also, since organic wavelength conversion layer is bonded connection with inorganic wavelength conversion layer, and organic wavelength conversion layer is led Hot property is preferable, therefore, it is possible to which the heat in inorganic wavelength conversion layer is distributed quickly, so as to effectively reduce ripple The temperature of long conversion equipment, improves the performance of the product such as light-emitting device and optical projection system.In addition, inorganic wavelength conversion layer conduct The layer of exciting light is absorbed, inorganic binder therein has more excellent resistance to relative to the organic binder bond in organic wavelength conversion layer High-temperature behavior, can prevent damage of the high temperature to organic wavelength conversion layer, so as to improve the service life of light-emitting device.

Brief description of the drawings

In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only this Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with Other attached drawings are obtained according to these attached drawings.

Fig. 1 is the structure diagram for the Wavelength converter that the embodiment of the present invention one provides;

Fig. 2 is the distribution map for another Wavelength converter that the embodiment of the present invention one provides;

Fig. 3 is the structure diagram for another Wavelength converter that the embodiment of the present invention one provides;

Fig. 4 is the structure diagram for another Wavelength converter that the embodiment of the present invention one provides;

Fig. 5 is the flow chart of Wavelength converter preparation method provided by Embodiment 2 of the present invention;

Fig. 6 is the flow chart for the Wavelength converter preparation method that the embodiment of the present invention three provides.

Embodiment

Above is the core concept of the present invention, to enable the above objects, features and advantages of the present invention more obvious easily Understand, the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.

Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still the present invention can be with Implemented using other different from other manner described here, those skilled in the art can be without prejudice to intension of the present invention In the case of do similar popularization, therefore the present invention is from the limitation of following public specific embodiment.

Secondly, combination schematic diagram of the present invention is described in detail, when the embodiment of the present invention is described in detail, for purposes of illustration only, table Show that the profile of device architecture can disobey general proportion and make partial enlargement, and the schematic diagram is example, and it should not herein Limit the scope of protection of the invention.In addition, the three-dimensional space of length, width and depth should be included in actually preparing.

It is described in detail below by several embodiments.

Embodiment one

A kind of Wavelength converter is present embodiments provided, as shown in Figure 1, including inorganic wavelength conversion layer 130, being stacked and placed on Organic wavelength conversion layer 140 on inorganic 130 1 surface of wavelength conversion layer, organic wavelength conversion layer 140 and inorganic wavelength convert The bonding connection of layer 130.

Wherein, inorganic wavelength conversion layer 130 includes inorganic cementitious material and first wave length transition material, is excited for absorbing Light λ0And produce the first stimulated light λ1(not shown), the thickness range of the inorganic wavelength conversion layer 130 is 90 μm~110 μm, Including endpoint value;Organic wavelength conversion layer 140 includes organic binding material and second wave length transition material, for absorbing described One stimulated light λ1And produce the second stimulated light λ2, the thickness range of organic wavelength conversion layer 140 is 60 μm~70 μm, including end Point value, in addition, the second wave length transition material is additionally operable to absorb exciting light and produces the 3rd stimulated light.In the present embodiment, second Stimulated light λ2Wavelength be more than the first stimulated light λ1Wavelength, and the first stimulated light λ1Wavelength be more than exciting light λ0Wavelength, i.e., The present invention is located at exciting light λ by wavelength0With the second stimulated light λ2The first middle stimulated light λ1, will be originally by exciting light λ0Directly Switch through and be changed to the second stimulated light λ2Process be divided into and absorb exciting light λ0Produce the first stimulated light λ1With the first stimulated light λ of absorption1Production Raw second stimulated light λ2The two processes.

Since the transfer efficiency of first wave length transition material is higher than second wave length transition material, during first The heat of generation is less, the first stimulated light λ of acquisition1Light efficiency it is higher so that by the first stimulated light λ1Second inspired Stimulated light λ2Light efficiency it is also higher, the heat of generation is also less, so as to directly absorb exciting light λ with second wave length transition material0Production Raw second stimulated light λ2Mode compare, the heat that inorganic wavelength conversion layer in the present embodiment and organic wavelength conversion layer produce Less, the temperature of Wavelength converter is relatively low, and the light efficiency of the second stimulated light of acquisition is higher.

In the present embodiment, the Wavelength converter combined using inorganic wavelength conversion layer and organic wavelength conversion layer comes The second stimulated light is formed, although the Wavelength converter with double-deck inorganic wavelength conversion layer can also be used, due to having The heat conductivility of machine wavelength conversion layer is preferable, therefore, it is possible to which the heat in inorganic wavelength conversion layer is distributed quickly, from And the temperature of Wavelength converter can be effectively reduced, improve the performance of the product such as light-emitting device and optical projection system.Also, this Outside, inorganic wavelength conversion layer is as the layer for absorbing exciting light, and inorganic binder therein is relative in organic wavelength conversion layer Organic binder bond has more excellent resistance to elevated temperatures, can prevent damage of the high temperature to organic wavelength conversion layer, so as to improve hair The service life of electro-optical device.

In addition, compared with the Wavelength converter with double-deck organic wavelength conversion layer, the wavelength convert in the present embodiment Device need not additionally add inorganic filler to lift the hardness of film layer again, reduce cost, simplify technique;Moreover, for Double organic wavelength conversion layers, excite the wavelength conversion layer of light incident side directly to receive laser irradiation, this high power density swashs The rapid aging of organic adhesive can be caused by shining.For double inorganic wavelength conversion layers, since the heat endurance of red light fluorescent powder is poor, It deteriorates decomposition temperature and the softening temperature of glass dust approaches, and glass dust sinters at a temperature of less than its softening point, by nothing Method realizes good bonding, and causes to produce substantial amounts of hole and increase the thermal resistance of wavelength conversion layer.

In the present embodiment, organic wavelength conversion layer is bonded connection with inorganic wavelength conversion layer, between the two formed with hydrogen bond Or chemical bond so that closely coupled between two layers, two layers of interface resistance is small, so that the heat energy that inorganic wavelength conversion layer produces It is enough quickly to conduct to organic wavelength conversion layer.

Certainly, inorganic wavelength conversion layer and a kind of organic wavelength conversion layer not only this connection mode, in the another of the present invention In a embodiment, other modes can also be used to connect, as shown in Fig. 2, Wavelength converter includes at least having the first subregion 31 and second subregion 32 wavelength conversion sheet, i.e. fluorescence colour wheel, certainly, the area size of the first subregion 31 and the second subregion 32 can To be adjusted according to actual needs.

The structure diagram of the Wavelength converter, as shown in figure 3, the first subregion 31 includes being stacked and being mutually bonded Inorganic wavelength conversion layer 310 and organic wavelength conversion layer 311, the inorganic wavelength conversion layer 310 includes inorganic cementitious material With first wave length transition material, for absorbing exciting light λ0And produce the first stimulated light λ1;Organic wavelength conversion layer 311 wraps Containing organic binding material and second wave length transition material, for absorbing the first stimulated light λ1And produce the second stimulated light λ2;Institute State the second subregion 32 and include inorganic cementitious material and the 3rd wavelength conversion material, for absorbing exciting light λ0And produce and be different from the Two stimulated light λ2The 3rd stimulated light λ3

Wherein, which further includes driving device, for driving above-mentioned fluorescence colour wheel along central axis, with Just exciting light λ0On the wavelength conversion material that the first subregion 31 and the second subregion 32 are incided according to certain sequential, and it is sequentially generated Corresponding stimulated light.

In yet another embodiment of the present invention, as shown in figure 4, Wavelength converter, which removes, includes inorganic wavelength conversion layer 130 and organic wavelength conversion layer 140 outside, further include the first optical diaphragm positioned at inorganic 130 another surface of wavelength conversion layer 120 and the second optical diaphragm 150 positioned at organic 140 another surface of wavelength conversion layer, as shown in Figure 4.

Wherein, the first optical diaphragm 120 for being arranged on inorganic 130 another surface of wavelength conversion layer is used to transmit the excitation Light λ0And reflect the first stimulated light λ1;Second optical diaphragm 150 on organic 140 another surface of wavelength conversion layer is arranged on, is used In reflection the first stimulated light λ1And transmit the second stimulated light λ2, or be at least used to reflect the second stimulated light λ2

When the second stimulated light is red stimulated light, the inorganic cementitious material for forming inorganic wavelength conversion layer 130 is glass Powder, first wave length transition material are yellow YAG (Yttrium Aluminum Garnet, yttrium-aluminium-garnet) fluorescent powder, formed with The organic binding material of machine wavelength conversion layer 140 is high transmittance silica gel or epoxy resin, its light transmittance to visible ray is every 2mm depth more than 90%, second wave length transition material are red fluorescence powder, at this time, exciting light λ0For blue excitation light, first by Laser λ1For yellow stimulated light.In the present embodiment, glass dust is high transparency, heat safe glass dust, can select to be borosilicate Silicate glass powder, boron phosphate glass powder, silicate glass powder, phosphate glass powder, zinc phosphate glass powder.

Wherein, the wave-length coverage of blue excitation light is 430nm~480nm, is preferably 445nm~455nm;First optical film Piece 120 modifies piece for blue light angle, and material is sapphire, and without plated film, 120b faces are coated with blue light angle modified membrane in its 120a face, should Blue light angle modified membrane only allows the blue light of very little angle by the way that the blue light of larger angle can then be reflected;Second optical diaphragm 150 modify piece for feux rouges color, its 150b face is coated with feux rouges modified membrane without plated film, 150a faces, which only allows red The light of optical band is by the way that the light of non-red spectral band can be reflected.

As shown in figure 4, the process for forming red stimulated light is:Blue excitation light collimated incident is to the first optical diaphragm 120 120a faces, by being incided after the first optical diaphragm 120 on inorganic wavelength conversion layer 130, excited inorganic wavelength conversion layer 130 In yellow fluorescent powder, produce yellow stimulated light, wherein, the blue light on portions incident to inorganic wavelength conversion layer 130 can be overflow 120b faces are reflexed to, still, the larger blue light of angle can be reflected back in inorganic wavelength conversion layer 130, excite yellow fluorescence Powder simultaneously produces yellow stimulated light;Then the yellow stimulated light can be incided on organic wavelength conversion layer 140, excite red therein Fluorescent powder, produces red stimulated light, and incides the 150a faces of the second optical diaphragm 150, due to the second optical diaphragm 150 150a faces can receive red stimulated light and have neither part nor lot in the yellow light of excitation, and yellow light can be reflected back into organic wavelength by 150a faces In conversion layer 140, therefore, the light by the 150b faces of the second optical diaphragm 150 is red stimulated light.

Wavelength converter provided in this embodiment, inorganic wavelength conversion layer absorb exciting light and produce the first stimulated light Afterwards, organic wavelength conversion layer absorbs first stimulated light and produces the second stimulated light, due to first in inorganic wavelength conversion layer The transfer efficiency of wavelength conversion material is higher than the second wave length transition material in organic wavelength conversion layer, therefore, with second wave length Transition material, which directly absorbs exciting light and produces the mode of the second stimulated light, to be compared, the inorganic wavelength conversion layer and organic in the present invention The heat that wavelength conversion layer produces is less, and the temperature of Wavelength converter is relatively low, and the light efficiency of the second stimulated light of acquisition is higher.

Also, since organic wavelength conversion layer is bonded connection with inorganic wavelength conversion layer, and organic wavelength conversion layer is led Hot property is preferable, therefore, it is possible to which the heat in inorganic wavelength conversion layer is distributed quickly, so as to effectively reduce ripple The temperature of long conversion equipment, improves the performance of the product such as light-emitting device and optical projection system.In addition, inorganic wavelength conversion layer conduct The layer of exciting light is absorbed, inorganic binder therein has more excellent resistance to relative to the organic binder bond in organic wavelength conversion layer High-temperature behavior, can prevent damage of the high temperature to organic wavelength conversion layer, so as to improve the service life of light-emitting device.

Embodiment two

Present embodiments provide a kind of Wavelength converter preparation method, its flow chart as shown in figure 5, including:

S501:Inorganic wavelength conversion layer is prepared using inorganic cementitious material and first wave length transition material;

In the present embodiment, first wave length transition material is yellow fluorescent powder, and inorganic cementitious material is glass dust.

The process for forming inorganic wavelength conversion layer is:By suitable yellow fluorescent powder and high transmittance borosilicate glass powder Mixing, the borosilicate glass powder are high melting point glass powder, and softening point is 780 DEG C, wherein, the quality hundred of fluorescent powder and glass dust Divide than being 77%:23%, organic carrier is then added in yellow fluorescent powder and glass dust upon mixing and slurry is made, its In, organic carrier is 15% with the mass percent of mixed fluorescent powder and glass dust:85%, manufactured slurry is placed in ball In grinding jar, and using high-purity zirconia abrading-ball slow-speed of revolution ball milling 4 it is small when, obtain fluorescent glass slurry.In other embodiments, it is glimmering The mass percent of light powder and glass dust can also be (30%~80%):(20%~70%), organic carrier with it is mixed The mass percent of fluorescent powder and glass dust can also be (10%~30%):(70%~90%).

Then fluorescent powder paste material is coated on demoulding substrate by the way of being scratched using silk-screen printing or directly, after coating Film layer thickness control in 130 μm~160 μ ms, afterwards at a temperature of 90 DEG C~150 DEG C toast 10min~ 15min, places into Muffle furnace after shaping and sinters, in the temperature program(me) being sintered, at a temperature of 400 DEG C~450 DEG C Dumping program when insulation 0.5~1.5 is small, so that organic carrier volatilizees completely;Also it is included under glass transition temperature and keeps the temperature The program of 20min~40min is kept the temperature under 20min~40min, glass transition temperature, so that glass mutually slowly softening, Ran Hou 20min~40min is sintered at a temperature of 800 DEG C~860 DEG C, obtains smooth, imperforate, the firm fluorescent glass layer of bonding, its Thickness control is shunk for 90 μm~110 μm, and so far i.e. preparation completes inorganic wavelength conversion layer.

After inorganic wavelength conversion layer is formed, organic wavelength need to be just formed on a surface of the inorganic wavelength conversion layer and is turned Layer is changed, wherein, organic wavelength conversion layer is to include organic binding material and second wave length transition material.

S502:Organic wavelength conversion layer is formed using organic binding material, second wave length transition material and anti-settling agent;

In the present embodiment, second wave length transition material is red fluorescence powder, and organic binding material is the silica gel of high transmittance, The blue light transmitance of the organic binding material is more than 95%, 160 DEG C of solidification temperature, when hardening time is 4 small.Wherein, it is red The mass percent of fluorescent powder, silica gel and anti-settling agent is 48%:43%:9%.In other embodiments, second wave length conversion material The mass percent of material, organic binding material and anti-settling agent is (30%~60%):(31%~61%):9%.

Suitable red fluorescence powder, high transmittance silica gel and anti-settling agent are weighed, be made after high-speed stirred is sufficiently mixed Slurry, then the deaeration 30min in vacuum degasing machine, obtains fluorescent powder silica gel slurry.Using high temperature gummed tape by a piece of PET (Polyethylene terephthalate, polyethylene terephthalate) film is pasted onto glass sheet surface, then will be made Fluorescent powder silica gel slurry blade coating or the PET film surface is printed on by steel mesh, 150 DEG C of temperature prebake conditions 10min~ Taken out after 15min and take the film layer after shaping off, that is, prepared and complete organic wavelength conversion layer, the thickness control of the film layer exists 60 μm~70 μm.

S503:Organic wavelength conversion layer is bonded or is superimposed upon a surface of the inorganic wavelength conversion layer.

Prepare after completing inorganic wavelength conversion layer and organic wavelength conversion layer, can be directly folded by organic wavelength conversion layer A surface of inorganic wavelength conversion layer is added in, due to containing silica gel in organic wavelength conversion layer, itself also have certain Viscosity, after it is superimposed with inorganic wavelength conversion layer, then be fitted in the first optical diaphragm and the second optical diaphragm Together, it is formed Wavelength converter.

Certainly, in other embodiments of the invention, other modes can also be used to be bonded inorganic wavelength conversion layer and have Machine wavelength conversion layer, i.e., can also scratch the silica gel that a layer thickness is about 20 μm~30 μm, so in organic wavelength convert layer surface Inorganic wavelength conversion layer is attached on the silica gel afterwards, and the clean-keeping paper of a surfacing is covered on its surface, using smooth After glass plate or aluminium sheet are pushed down, prebake conditions 15min in the baking oven that temperature is 150 DEG C is put into togerther, is removed after the completion of prebake conditions Glass plate or aluminium sheet, throw off clean-keeping paper, continue baking 3 it is small when, edge is carried out after the completion of baking to repair sanction, that is, obtains side Surface has organic wavelength conversion layer of inorganic wavelength conversion layer, is pasted again with the first optical diaphragm and the second optical diaphragm afterwards Close, be formed Wavelength converter.

Wavelength converter preparation method provided in this embodiment, using inorganic cementitious material and first wave length transition material The inorganic wavelength conversion layer for absorbing exciting light and producing the first stimulated light is prepared, is changed using organic binding material and second wave length Material forms the organic wavelength conversion layer for absorbing the first stimulated light and producing the second stimulated light, due to first wave length transition material Transfer efficiency is higher than second wave length transition material, therefore, with second wave length transition material directly absorb exciting light produce second by The mode of laser is compared, the heat that the inorganic wavelength conversion layer and organic wavelength conversion layer that method provided in this embodiment makes produce Measure less, the temperature of Wavelength converter is relatively low, and the light efficiency of the second stimulated light of acquisition is higher.

Also, since organic wavelength conversion layer with inorganic wavelength conversion layer is bonded or is superimposed, and organic wavelength conversion layer Heat conductivility is preferable, therefore, it is possible to which the heat in inorganic wavelength conversion layer is distributed quickly, so as to effectively reduce The temperature of Wavelength converter, improves the performance of the product such as light-emitting device and optical projection system.In addition, inorganic wavelength conversion layer is made To absorb the layer of exciting light, inorganic binder therein has more excellent relative to the organic binder bond in organic wavelength conversion layer Resistance to elevated temperatures, can prevent damage of the high temperature to organic wavelength conversion layer, so as to improve the service life of light-emitting device.

Embodiment three

Present embodiments provide a kind of Wavelength converter preparation method, its flow chart as shown in fig. 6, including:

S601:Inorganic wavelength conversion layer is prepared using inorganic cementitious material and first wave length transition material;

In the present embodiment, first wave length transition material is yellow fluorescent powder, and inorganic cementitious material is glass dust.Also, make The process of standby inorganic wavelength conversion layer is identical with the process that inorganic wavelength conversion layer is prepared in embodiment two, and details are not described herein, Its difference is the forming process of organic wavelength conversion layer.

S602:By the way of precipitation deposits organic wavelength convert is formed on a surface of the inorganic wavelength conversion layer Layer.

In the present embodiment, organic wavelength conversion layer is formed by organic binding material and second wave length transition material , second wave length transition material is red fluorescence powder, and organic binding material is silane coupling agent hydrating solution.

The process for preparing silane coupling agent hydrating solution is:70g deionized waters are added to three necks that capacity is 250ml to justify In the flask of bottom, suitable 40% acetic acid solution is then added, and the pH value of solution is adjusted to 5.Weigh 4.5g KH560 simultaneously It is dissolved in the absolute ethyl alcohol of 23ml, 2g deionized waters is instilled after stirring and carry out prehydrolysis, then slowly instill the solution quickly In the three neck round bottom of stirring, when reaction 3 is small, solution to be mixed is in that clear is the silane coupling agent water that can be needed Solve solution.

In the present embodiment, the process for preparing organic wavelength conversion layer is:The inorganic wavelength conversion layer of preparation is placed on and is held Carry chucking surface, it is desirable to which the surface of the inorganic wavelength conversion layer and the surface of carrying fixture fit closely and fix, then by it It is placed on the bottom of cylindrical container.Measure cylindrical container bottom inner circular area SBottom, it is known that the density p of red fluorescence powderPowder、 The thickness for needing organic wavelength conversion layer to be prepared is dPowder, then need add red fluorescence powder quality mPowderPowder*SBottom*dPowder(1)。

The red fluorescence powder of the certain mass calculated according to formula (1) is added to prepared silane coupling agent hydrolysis In solution, after being dispersed with stirring, then ultrasonic disperse, after uniform admixture is presented in solution, pour into immediately bottom be placed with it is inorganic In the cylindrical container of wavelength conversion layer, static placement, treats that the red fluorescence powder in solution all precipitates, and upper solution is nothing During the transparent liquid of color, the solution on upper strata is slowly taken away, then the hydrostatic column is placed in the baking oven that temperature is 120 DEG C and is dried It is roasting 2 it is small when, surface has been obtained after the completion of baking has organic wavelength conversion layer of inorganic wavelength conversion layer, afterwards again with first Optical diaphragm and the fitting of the second optical diaphragm, are formed Wavelength converter.

Wavelength converter preparation method provided in this embodiment, using inorganic cementitious material and first wave length transition material The inorganic wavelength conversion layer for absorbing exciting light and producing the first stimulated light is formed, is changed using organic binding material and second wave length Material forms the organic wavelength conversion layer for absorbing the first stimulated light and producing the second stimulated light, due to first wave length transition material Transfer efficiency is higher than second wave length transition material, therefore, with second wave length transition material directly absorb exciting light produce second by The mode of laser is compared, the heat that the inorganic wavelength conversion layer and organic wavelength conversion layer that method provided in this embodiment makes produce Measure less, the temperature of Wavelength converter is relatively low, and the light efficiency of the second stimulated light of acquisition is higher.

Also, since organic wavelength conversion layer is bonded connection with inorganic wavelength conversion layer by way of precipitation, and have The heat conductivility of machine wavelength conversion layer is preferable, therefore, it is possible to which the heat in inorganic wavelength conversion layer is distributed quickly, from And the temperature of Wavelength converter can be effectively reduced, improve the performance of the product such as light-emitting device and optical projection system.In addition, nothing Machine wavelength conversion layer is as the layer for absorbing exciting light, and inorganic binder therein is relative to organic viscous in organic wavelength conversion layer Knot agent has more excellent resistance to elevated temperatures, damage of the high temperature to organic wavelength conversion layer can be prevented, so as to improve light-emitting device Service life.

Example IV

A kind of light-emitting device of the Wavelength converter provided including embodiment one is be provided, and including this The optical projection system of light-emitting device.Light-emitting device provided in this embodiment and optical projection system, light efficiency is good, heat production is few, and temperature is low, the service life Longer, performance is more excellent.

Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other The difference of embodiment, between each embodiment identical similar portion mutually referring to.For device disclosed in embodiment For, since it is corresponded to the methods disclosed in the examples, so description is fairly simple, related part is said referring to method part It is bright.

The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or use the present invention. A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention The embodiments shown herein is not intended to be limited to, and is to fit to and the principles and novel features disclosed herein phase one The most wide scope caused.

Claims (12)

  1. A kind of 1. Wavelength converter, it is characterised in that including:
    Inorganic wavelength conversion layer comprising inorganic cementitious material and first wave length transition material, for absorbing exciting light and producing the One stimulated light;
    Organic wavelength conversion layer on one surface of inorganic wavelength conversion layer is stacked and placed on, organic wavelength conversion layer includes organic Binding material and second wave length transition material, for absorbing first stimulated light and producing the second stimulated light;
    Organic wavelength conversion layer is bonded connection with the inorganic wavelength conversion layer.
  2. 2. Wavelength converter according to claim 1, it is characterised in that the second wave length transition material is additionally operable to inhale Receive exciting light and produce the 3rd stimulated light.
  3. 3. Wavelength converter according to claim 1, it is characterised in that further include:
    The first optical diaphragm positioned at surface of the inorganic wavelength conversion layer away from organic wavelength conversion layer, for transmiting The exciting light simultaneously reflects first stimulated light.
  4. 4. Wavelength converter according to claim 1, it is characterised in that further include:
    The second optical diaphragm positioned at surface of the organic wavelength conversion layer away from the inorganic wavelength conversion layer, for reflecting First stimulated light simultaneously transmits second stimulated light, or is at least used to reflect the second stimulated light.
  5. 5. Wavelength converter as claimed in any of claims 1 to 4, it is characterised in that the inorganic bond material Expect that for glass dust, the first wave length transition material be yellow fluorescent powder;The organic binding material is silica gel or epoxy resin, The second wave length transition material is red fluorescence powder.
  6. 6. Wavelength converter according to claim 5, it is characterised in that the thickness range of the inorganic wavelength conversion layer For 90 μm~110 μm;The thickness range of organic wavelength conversion layer is 60 μm~70 μm.
  7. A kind of 7. preparation method of Wavelength converter, it is characterised in that including:
    Step 1:Inorganic wavelength conversion layer is prepared using inorganic cementitious material and first wave length transition material;
    Step 2:Formed on a surface of the inorganic wavelength conversion layer using organic bonding material and second wave length transition material Organic wavelength conversion layer, makes to be bonded connection between organic wavelength conversion layer and inorganic wavelength conversion layer.
  8. 8. the method according to the description of claim 7 is characterized in that the process of the step 2 is:
    By the way of precipitation deposits organic wavelength conversion layer is formed on a surface of the inorganic wavelength conversion layer.
  9. 9. according to the method described in claim 8, it is characterized in that, the mode of the precipitation deposition is specially:
    The inorganic wavelength conversion layer is placed on inside container;
    The advance prepared silane coupling agent hydrating solution with second wave length transition material is poured into the container;
    After the silane coupling agent hydrating solution precipitation, deposition, organic ripple is formed on a surface of the inorganic wavelength conversion layer Long conversion layer.
  10. A kind of 10. Wavelength converter, it is characterised in that including at least the first subregion and the second subregion, wherein, described first point Area includes the inorganic wavelength conversion layer for being stacked and being mutually bonded and organic wavelength conversion layer, the inorganic wavelength conversion layer bag Containing inorganic cementitious material and first wave length transition material, for absorbing exciting light and producing the first stimulated light;Organic wavelength Conversion layer includes organic binding material and second wave length transition material, is excited for absorbing first stimulated light and producing second Light;
    Second subregion includes inorganic cementitious material and the 3rd wavelength conversion material, is different from for absorbing exciting light and producing 3rd stimulated light of the second stimulated light.
  11. 11. a kind of light-emitting device, it is characterised in that including claim 1-6 any one of them Wavelength converter or right It is required that the Wavelength converter described in 10.
  12. 12. a kind of optical projection system, it is characterised in that including the light-emitting device described in claim 11.
CN201410341637.7A 2014-07-17 2014-07-17 Wavelength converter and preparation method thereof, related lighting fixtures and optical projection system CN105301878B (en)

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CN109560179A (en) * 2017-09-26 2019-04-02 深圳光峰科技股份有限公司 A kind of Wavelength converter and light emitting device
CN109838703A (en) * 2017-11-29 2019-06-04 深圳光峰科技股份有限公司 Wavelength converter
CN110118312A (en) * 2018-02-07 2019-08-13 深圳光峰科技股份有限公司 Wavelength converter
CN109638145A (en) * 2018-11-22 2019-04-16 华南农业大学 Red blue light glass ceramics turns optical assembly, preparation method and plant lamp

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