CN107644932A - Wavelength convert part and use its luminescent device - Google Patents
Wavelength convert part and use its luminescent device Download PDFInfo
- Publication number
- CN107644932A CN107644932A CN201710469684.3A CN201710469684A CN107644932A CN 107644932 A CN107644932 A CN 107644932A CN 201710469684 A CN201710469684 A CN 201710469684A CN 107644932 A CN107644932 A CN 107644932A
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- China
- Prior art keywords
- wavelength convert
- layer
- porous ceramic
- convert part
- ceramic layer
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/02—Structural details or components not essential to laser action
- H01S5/022—Mountings; Housings
- H01S5/0239—Combinations of electrical or optical elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
Abstract
Present invention offer has the ceramic layer wavelength convert part excellent as reflecting layer, luminous intensity and uses its luminescent device, and wavelength convert part (10) includes the first porous ceramic layer (1) that porosity is more than 20 volume %, the low-index layer (3) for the refractive index that formation is on the first porous ceramic layer and the luminescent coating containing fluorophor (2), formation are on luminescent coating (2) and below the refractive index with fluorophor.
Description
Technical field
The present invention relates to the wavelength convert part for being suitable as projector fluorescent wheel etc. and use its luminescent device.
Background technology
In recent years, in order to which projector is minimized, motion has using LED (Light EmittingDiode：Light-emitting diodes
Pipe) etc. light source and fluorophor luminescent device.For example, motion have by the light of light source luminescent coating carry out wavelength convert, make institute
The fluorescence of acquisition utilize with the reflecting layer that wavelength convert part is disposed adjacent to the incident lateral reflection of light source and to outside take out,
The fluorescent wheel of so-called reflection-type (for example, referring to patent document 1).The fluorescent wheel of reflection-type has to the outside effect for taking out fluorescence
Rate is high, the advantages of easily realizing the high brightness of projector.
In patent document 1, the metal levels such as gold, silver, copper, aluminium are disclosed as reflecting layer.Metal level is due to thermal conductivity factor
Also it is high so will effectively can be discharged in heat caused by luminescent coating to outside, therefore with can effectively suppress fluorophor
Temperature quenching (due to fluorophor temperature rise and luminous intensity reduce phenomenon) the advantages of.
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2015-1709 publications
The content of the invention
Invent problem to be solved
Because the thermal coefficient of expansion of metal level is bigger, so in the case of the light source irradiation light or stopped illumination
The ratio of expansion and contraction in the case of penetrating is big.Therefore, due to the coefficient of thermal expansion differences with luminescent coating, exist in fluorescence
Body layer produce crack or it is peeling-off the problem of.Therefore consider using the pottery that thermal coefficient of expansion is smaller, thermal conductivity factor is higher
There are the reflection differences of ceramic layer in enamel coating, it is impossible to the problem of obtaining sufficient luminous intensity as reflecting layer.
In view of the above problems, problem of the invention is：There is provided has ceramic layer excellent as reflecting layer, luminous intensity
Wavelength convert part and use its luminescent device.
For solving the method for problem
The present invention wavelength convert part be characterised by, including：Porosity is more than 20 volume % the first porous pottery
Enamel coating；Formed on the first porous ceramic layer and the luminescent coating containing fluorophor；With formation on luminescent coating and with glimmering
The low-index layer of refractive index below the refractive index of body of light.
In the wavelength convert part of the present invention, the first porous ceramic layer plays a role as reflecting layer.Specifically, lead to
Cross and irradiate exciting light (with the interarea that the first porous ceramic layer side is opposite side) to the interarea of luminescent coating and caused fluorescence exists
First porous ceramic layer is reflected, from luminescent coating with exciting the main facing external of light entrance face identical to project.Wherein, pass through
Porosity of first porous ceramic layer with more than 20 volume % shows high light reflectivity.Specifically, it is being present in first
The interface of the hole of the inside of porous ceramic layer and ceramics, due to both refringences, light is easily reflected.In the present invention
In, the ratio of the hole in the first porous ceramic layer is bigger, is more than 20 volume %, and existing largely contributes to the upper of light reflection
Interface is stated, thus it is overall as the first porous ceramic layer, and light reflectivity becomes big.As a result, it will can be produced in luminescent coating
Fluorescence effectively reflected in the first porous ceramic layer, it is possible to increase the luminous intensity of wavelength convert part.In addition, in luminescent coating
Caused heat is released by the first porous ceramic layer.
In the wavelength convert part of the present invention, formed with the folding below the refractive index with fluorophor on luminescent coating
Penetrate the low-index layer of rate.Thereby, it is possible to improve exciting light to the incident efficiency of wavelength convert part and from wavelength convert part
Outgoing efficiency, as a result, it is possible to increase luminous intensity.In addition, general luminescent coating has the base in glass and resin etc.
The structure for being dispersed with fluorophor powder in matter and forming.Herein due to higher (such as the YAG fluorescence of the refractive index of fluorophor powder
The refractive index nd of body is about 1.8), so the trend that the refractive index that luminescent coating be present also uprises.Therefore, low refraction is not being formed
In the case of rate layer, the refringence of outside air and luminescent coating becomes big, in both easy reflected excitation lights in interface and
Fluorescence.
In the wavelength convert part of the present invention, preferably luminescent coating passes through welding or inorganic bonding layer and the first porous pottery
Enamel coating engages.
, can be without using low resin adhesive of heat resistance etc., by luminescent coating and the first porous pottery according to said structure
Enamel coating engages, therefore can obtain the wavelength convert part of excellent heat resistance.Specifically, although because resin adhesive is because swashing
Luminous irradiation is hot and deteriorates simultaneously melanism, and luminous intensity easily reduces with the process of time, but is not easy according to said structure
Produce the problem of such.Further, since the thermal conductivity of resin adhesive is low, thus using resin adhesive by luminescent coating with
In the case that first porous ceramic layer is bonded, in hot not easy heat radiation caused by luminescent coating to the first porous ceramic layer side.It is another
Aspect, if luminescent coating is engaged by welding or inorganic bonding layer with the first porous ceramic layer, caused by luminescent coating
Heat easily and efficiently radiates to the first porous ceramic layer side.
In the wavelength convert part of the present invention, preferably the first porous ceramic layer contains selected from aluminum oxide, magnesia and oxygen
Change at least one kind of in zirconium.
In the wavelength convert part of the present invention, preferably in the first porous ceramic layer and the interarea formed with luminescent coating
For opposite side interarea formed with heat dissipating layer.
In heat transfer caused by luminescent coating to the first porous ceramic layer, but it is a large amount of due to existing in the first porous ceramic layer
Hole and that thermal conductivity is insufficient be present.In this case, if using said structure, produce in luminescent coating and
Conduct to the heat of the first ceramic layer and discharged easily by heat dissipating layer to outside.Thereby, it is possible to further suppress luminescent coating
Heating.
In the wavelength convert part of the present invention, preferably heat dissipating layer is the dense ceramic layers that porosity is less than 20 volume %.
The ratio of the hole with thermal insulation of dense ceramic layers is than relatively low, and less than 20 volume %, therefore thermal conductivity compares
It is excellent.Further, since the light for not reflecting and transmiting in the first porous ceramic layer can be reflected in dense ceramic layers, therefore conduct
Wavelength convert part can integrally improve light reflectivity.
In the wavelength convert part of the present invention, preferably dense ceramic layers contain selected from aluminum oxide, magnesia and zirconium oxide
In it is at least one kind of.
In the wavelength convert part of the present invention, preferably it is with the interarea formed with the first porous ceramic layer in heat dissipating layer
The interarea of opposite side, formed with the second more than the volume % of porosity 20 porous ceramic layer.
As described later, the first porous ceramic layer is for example made by the firing of the raw cook as raw material.Herein, due to life
Piece easily shrinks because of firing, so there is a situation where to produce warpage comprising the laminated body of the first porous ceramic layer and heat dissipating layer.
Warpage is easily produced particularly in the case where the thickness of each layer is small.Therefore, by heat dissipating layer with it is porous formed with first
The interarea of ceramic layer forms more than the volume % of porosity 20 the second porous ceramic layer for the interarea of opposite side, obtains in heat dissipating layer
Between the first ceramic layer caused stress and between heat dissipating layer and the second ceramic layer caused stress balance, be not likely to produce
Warpage during firing.
The present invention wavelength convert part in, preferably the porosity of the first porous ceramic layer and the second porous ceramic layer,
Thickness and/or material are substantially the same.So, then the life during manufacture of the wavelength convert part of the present invention can effectively be suppressed
The problem of warpage in the ablating work procedure of piece." substantially the same " refers to that porosity, thickness, the difference of material are not up to shadow in addition
Ring the degree of the warpage in the ablating work procedure of raw cook.Specifically, on porosity, it is less than 5% to refer to difference.In addition, close
In thickness, refer to the ratio of the difference of the thickness of each layer (relative to the big layer of thickness in each layer, the ratio of the difference of the thickness of each layer
Example) it is less than 10%.
In the wavelength convert part of the present invention, preferably luminescent coating in inorganic bond by disperseing fluorophor and structure
Into.So, then the heat resistance of luminescent coating is easily improved, breakage for exciting luminescent coating caused by light irradiation etc. is not likely to produce and asks
Topic.
In the wavelength convert part of the present invention, preferably low-index layer is made up of glass.
The wavelength convert part of the present invention can also be colyliform.In such a situation it is preferred to the structure as projector light source
Into part.
The present invention luminescent device be characterised by, including：Above-mentioned wavelength convert part；With to wavelength convert part
Luminescent coating irradiates the light source of exciting light.
The luminescent device of the present invention can use as projector light source.
Invention effect
In accordance with the invention it is possible to provide with the ceramic layer wavelength convert part excellent as reflecting layer, luminous intensity and
Use its luminescent device.
Brief description of the drawings
Fig. 1 (a) is the schematic isometric for the wavelength convert part for representing the first embodiment of the present invention, and Fig. 1 (b) is table
The figure of a part for the lateral section of the wavelength convert part of diagram 1 (a).
Fig. 2 is the figure of a part for the lateral section for the wavelength convert part for representing second embodiment of the present invention.
Fig. 3 is the figure of a part for the lateral section for the wavelength convert part for representing third embodiment of the present invention.
Fig. 4 (a) is the top view for the wavelength convert part for representing the 4th embodiment of the present invention, and Fig. 4 (b) is Fig. 4 (a)
A-A ' sectional views.
Fig. 5 is to represent to be used for the diagrammatic top view for carrying out the sample of the wavelength convert part of evaluating characteristics in embodiment.
Brief description of the drawings
1 first porous ceramic layer
1 ' second porous ceramic layer
2 luminescent coatings
3 low-index layers
4 heat dissipating layers
10th, 20,30,40 wavelength convert part
C notch
Embodiment
Hereinafter, the embodiment of the wavelength convert part of the present invention is illustrated using accompanying drawing.But following implementation
Mode is simple illustration, and the present invention is not limited to following embodiment.In addition, in the drawings, have sometimes real
The part of identical function carries out reference with identical symbol in matter.
(1) the wavelength convert part of first embodiment
Fig. 1 (a) is the schematic isometric for the wavelength convert part for representing the first embodiment of the present invention, and Fig. 1 (b) is table
The figure of a part for the lateral section of the wavelength convert part of diagram 1 (a).
Wavelength convert part 10 includes：First porous ceramic layer 1；The luminescent coating 2 containing fluorophor being formed on；
The low-index layer 3 being further formed on.First porous ceramic layer 1, luminescent coating 2, low-index layer 3 have external diameter
It is roughly the same and by as the colyliform formed in a manner of concentric.Exciting light from the upper surface of low-index layer 3 (with formed with fluorescence
The face of body layer 2 is the face of opposite side) it is incident, wavelength convert is carried out by fluorophor contained in luminescent coating 2, sends fluorescence.
Fluorescence is reflected in the first porous ceramic layer 1, is projected from the upper table facing external of low-index layer 3.Wherein, preferably first is porous
For ceramic layer 1 compared with luminescent coating 2, thermal conductivity factor is high, thus easily will effectively be released in heat caused by luminescent coating 2 to outside
Put.
The porosity of first porous ceramic layer 1 is more than 20 volume %, preferably more than 30 volume %, particularly preferably 40
More than volume %.By the first porous ceramic layer 1 have more than 20 volume % porosity, according to it is stated that the reasons why show height
Light reflectivity.The upper limit of the porosity of first porous ceramic layer 1 is preferably below 80 volume %, more preferably 75 volume % with
Under, particularly preferably below 70 volume %.If the porosity of the first porous ceramic layer 1 is too high, mechanical strength reduces, or
Thermal conductivity factor reduces, it is difficult to will be discharged in heat caused by luminescent coating 2 to outside.
First porous ceramic layer 1 can enumerate comprising aluminum oxide, magnesia, zirconium oxide, titanium oxide, niobium oxide, zinc oxide,
The material of silica, yittrium oxide, aluminium nitride, boron nitride, silicon nitride, carborundum etc..These both can be used alone, and can also incite somebody to action
Two or more is used in combination.Wherein, aluminum oxide, magnesia, zirconium oxide are high and cheap because of thermal conductivity factor, it is advantageous to.It is especially excellent
Select aluminum oxide.
The thickness of first porous ceramic layer 1 is preferably 0.05~2mm, 0.1~1.5mm, particularly preferably 0.2~1mm.Such as
The thickness of the first porous ceramic layer of fruit 1 is too small, then mechanical strength reduces, easily damaged during use.In addition, it is not easy to obtain sufficiently
Light reflectivity.On the other hand, if the thickness of the first porous ceramic layer 1 is excessive, exist wavelength convert part 10, further and
Speech becomes big trend using the quality of its luminescent device.In addition, the wavelength convert part 10 of colyliform is being used for projector
In the case of light source, the load that the motor to rotating wavelength convert part 10 be present becomes big or the caused vibration of rotation becomes
The problem of big and damaged.
As luminescent coating 2, such as the luminescent coating for disperseing fluorophor in inorganic bond and forming can be enumerated.This
Sample, then also easily matched with the thermal coefficient of expansion of the first porous ceramic layer 1, even in due to exciting light irradiation and as high temperature
In the case of, it is not easy to produce the breakage due to coefficient of thermal expansion differences.Glass etc. can be enumerated as inorganic bond.
As the glass as inorganic bond, borosilicate system glass, phosphate-based glass etc. can be used.Glass
Softening point is preferably 250~1000 DEG C, particularly preferably 300~850 DEG C.If the softening point of glass is too low, luminescent coating 2
Mechanical strength reduce, or easily melt due to the irradiation of exciting light.On the other hand, if the softening point of glass is too high,
Fluorophor is easily deteriorated in ablating work procedure during fabrication, and the luminous intensity of luminescent coating 2 is easily reduced.
As long as fluorophor projects the fluorophor of fluorescence by the incidence of exciting light, just it is not particularly limited.As glimmering
The concrete example of body of light, such as can enumerate selected from oxide phosphor, nitride phosphor, nitrogen oxides fluorophor, chloride
Fluorophor, acid chloride fluorophor, sulphide phosphor, oxysulfide fluorophor, halide fluorophor, chalcogenide fluorophor,
1 kind in chlorate MClO 3 fluorescent substance, halogen-phosphate compound fluorophor, garnet based compound fluorophor is with first-class.Using blueness
In the case that light is as exciting light, such as the fluorophor that green light, sodium yellow or red light are projected as fluorescence is used in mixed way
.
Average grain diameter (the D of fluorophor50) it is preferably 1~50 μm, particularly preferably 5~25 μm.If fluorophor is averaged
Particle diameter is too small, then luminous intensity easily declines.On the other hand, if the average grain diameter of fluorophor is excessive, glow color be present
Become uneven trend.
The content of fluorophor in luminescent coating 2 is preferably 5~80 volume %, 10~75 volume %, and particularly preferably 20
~70 volume %.If the content of fluorophor is very few, the trend that luminous intensity becomes insufficient be present.On the other hand, if
The content of fluorophor is excessive, then the trend that the mechanical strength of luminescent coating 2 becomes insufficient be present.
The thickness of luminescent coating 2 is preferably thinner in the range of the thickness that exciting light is reliably absorbed by fluorophor.This is
Because if luminescent coating 2 is blocked up, the scattering of the light of luminescent coating 2 be present and absorb too much, the outgoing efficiency of fluorescence of change
The situation of step-down.Specifically, the thickness of luminescent coating 2 is preferably below 1mm, below 0.5mm, particularly preferably 0.3mm with
Under.The lower limit of the thickness of luminescent coating 2 is usually 0.03mm or so.
Low-index layer 3 is for example made up of glass.As glass, borosilicate system glass, phosphate-based glass can be used
Glass etc..The softening point of glass is preferably 250~1000 DEG C, particularly preferably 300~850 DEG C.If the softening point of glass is too low,
Then the mechanical strength of low-index layer 3 reduces, or easily melts due to the irradiation of exciting light.On the other hand, if glass
Softening point is too high, then ablating work procedure fluorophor during fabrication is easily deteriorated, and the luminous intensity of luminescent coating 2 is easily reduced.
The refractive index (nd) of low-index layer 3 is preferably less than 1.9, less than 1.85, less than 1.8, less than 1.7, especially excellent
Elect less than 1.6 as.If the refractive index of low-index layer 3 is too high, it is difficult to the effect for obtaining raising luminous intensity as described above
Fruit.On the other hand, although the lower limit of the refractive index of low-index layer 3 is not particularly limited, it is more than 1.4 in reality, enters one
Walk as more than 1.45.
For example, low-index layer 3 is fused to luminescent coating 2.From improving the closely sealed strong of luminescent coating 2 and low-index layer 3
From the viewpoint of degree, (30~380 DEG C) of the coefficient of thermal expansion differences of preferably luminescent coating 2 and low-index layer 3 is 100 × 10-7/℃
Below, 80 × 10-7/ DEG C below, 60 × 10-7/ DEG C below, particularly preferably 40 × 10-7/ DEG C below.In addition, in luminescent coating 2
The difference of the softening point of contained inorganic bond and the softening point of low-index layer 3 is preferably less than 200 DEG C, less than 150 DEG C, special
You Xuanwei not be less than 100 DEG C.
If the thickness of low-index layer 3 is excessive, exciting light and fluorescence be present and absorbed, or the scattering loss to outside
Become big trend.Therefore, the thickness of low-index layer 3 is preferably below 0.1mm, below 0.05mm, below 0.03mm, especially excellent
Elect below 0.02mm as.It is more than 0.003mm although the lower limit of the thickness of glassy layer 20 is not particularly limited, in reality,
It is further more than 0.01mm.
From the viewpoint of being not easy to absorb exciting light and fluorescence in low-index layer 3, the full light transmission of low-index layer 3
Rate is preferably more than 50%, more than 65%, particularly preferably more than 80%.
Luminescent coating 2 is preferably engaged by welding or inorganic bonding layer with the first porous ceramic layer 1.In such manner, it is possible to improve
The heat resistance of wavelength convert part 10.Furthermore it is possible to effectively will be in heat caused by luminescent coating 2 to the first porous ceramic layer 1
Radiate side.
As luminescent coating 2 to be fused to the method for the first porous ceramic layer 1, such as it can enumerate and fold luminescent coating 2
Layer is in the method that heating crimping is carried out on the interarea 1a of the first porous ceramic layer 1, is fired.Such as disperse fluorescence in glass matrix
Body and in the case of the luminescent coating 2 that forms, the glass matrix of the first porous ceramic layer of welding 1 and luminescent coating 2.
As the method that luminescent coating 2 is engaged in the first porous ceramic layer 1 by inorganic bonding layer, can enumerate more
The transparent inorganic material that coating is formed using sol-gel process on the interarea 1a of hole ceramic layer 1, in stack fluorescent body layer 2 thereon,
The method heated.As the transparent inorganic material formed using sol-gel process, polysilazane etc. can be enumerated.Poly- silicon
Azane and the reaction of moisture in air, produce ammonia and are condensed, be consequently formed SiO2Overlay film.So, as transparent inorganic material,
The cement that the glass-film of inanimate matter is formed in relatively low temperature (room temperature~200 DEG C) can be used.In addition, additionally it is possible to use
Comprising ethanol-soluble type organo-silicon compound, other metallic compounds (organic or inorganic), in the presence of a catalyst in relatively low temperature
It is lower to form the SiO same with glass2The cement of network.The cement as organo-metallic compound use metal alkoxide,
In the case of using ethanol as catalyst, promote hydrolysis and dehydration, as a result form SiO2Network.
Wavelength convert part 10 can make like that according to following.
By using doctor blade method etc. using the ceramic powders comprising the raw material as the first porous ceramic layer 1 and adhesive tree
The slurry coats of the organic principles such as fat, solvent, plasticizer are on the resin film of polyethylene terephthalate etc. and being added
Heated drying, make the first porous ceramic layer 1 and use raw cook.Wherein, as the first porous ceramic layer 1 raw material ceramic powders it is flat
Equal particle diameter (D50) it is preferably 0.1~10 μm.If the average grain diameter of ceramic powders is too small, the hole of the first porous ceramic layer 1
Rate is easily reduced.On the other hand, if the average grain diameter of ceramic powders is excessive, sintering becomes insufficient, the first porous ceramics
The mechanical strength of layer 1 easily declines.Then, the first porous ceramic layer 1 is fired with raw cook with about 1200~1500 DEG C.This
Sample, obtain the first porous ceramic layer 1.Wherein, if firing temperature is too low, exist and sinter insufficient trend.On the other hand,
If firing temperature is too high, porosity is easily reduced.
In addition, by using doctor blade method etc. by the glass powder comprising the glass matrix as luminescent coating 2, fluorophor and
The slurry coats of the organic principles such as adhesive resin, solvent, plasticizer are on the resin film of polyethylene terephthalate etc.
And be thermally dried, make luminescent coating 2 and use raw cook.
Furthermore, the glass powder as low-index layer 3 and adhesive tree will be included by using doctor blade method etc.
The slurry coats of the organic principles such as fat, solvent, plasticizer are on the resin film of polyethylene terephthalate etc. and being added
Heated drying, make low-index layer 3 and use raw cook.
By the porous ceramic layer 1 obtained, the raw cook of luminescent coating 2, the raw chip laminating of low-index layer 3, it is fired,
Be derived from porous ceramic layer 1, luminescent coating 2, the welding of low-index layer 3 engagement and form wavelength convert part 10.Wherein,
In the range of firing temperature is preferably softening temperature ± 100 DEG C of the glass powder of luminescent coating 2 and low-index layer 3, especially
Preferably in the range of softening point ± 50 DEG C of glass powder.If firing temperature is too low, porous ceramic layer 1 and luminescent coating
2, or luminescent coating 2 and low-index layer 3 be not easy welding.In addition, the sintering of glass powder becomes insufficient, luminescent coating 2,
The mechanical strength of low-index layer 3 easily declines.On the other hand, if firing temperature is too high, the fluorescence of luminescent coating 2 be present
Body deteriorate and luminous intensity decline the problem of.
In addition, in the above-mentioned methods, porous ceramic layer 1, the raw cook of luminescent coating 2, low-index layer 3 are used into raw chip laminating
And be fired simultaneously, but it is not limited to this.For example, it is also possible to by the way that porous ceramic layer 1 and luminescent coating 2 first are used into raw cook
Lamination, it is fired, is further fired with raw cook in the superimposed layer low-index layer 3 of luminescent coating 2 obtained afterwards
To form low-index layer 3.
Or, additionally it is possible to by the way that the raw cook of porous ceramic layer 1, the raw cook of luminescent coating 2, low-index layer 3 are used into raw cook
Be fired respectively and obtain porous ceramic layer 1, luminescent coating 2, low-index layer 3, afterwards using inorganic binding agent by they
Engagement, the wavelength to form is engaged so as to obtaining porous ceramic layer 1, luminescent coating 2, low-index layer 3 by inorganic bonding layer
Converting member 10.
In addition to the method described above, the slurry of luminescent coating 2 can also be coated with the surface of porous ceramic layer 1, be fired,
Thus luminescent coating 2 is formed on porous ceramic layer 1, is coated with the slurry of low-index layer 3 on the surface of luminescent coating 2 afterwards,
Further it is fired and forms low-index layer 3.Luminescent coating 2 used herein uses slurry with slurry and low-index layer 3
It is able to using luminescent coating 2 with raw cook and low-index layer 3 with the slurry used in the making of raw cook.
In addition, in above-mentioned each manufacture method, can also be carried out before the firing of raw cook or slurry organic for removing
The degreasing process of thing.In addition, in the lamination of each layer comprising raw cook, can also be suitably in order to improve mutual adaptation
Carry out heating crimping.
(2) the wavelength convert part of second embodiment
Fig. 2 is the figure of a part for the lateral section for the wavelength convert part for representing second embodiment of the present invention.At this
In the wavelength convert part 20 of embodiment, in the master with the interarea formed with luminescent coating 2 for opposite side of porous ceramic layer 1
Heat dissipating layer 4 is provided with face, it is different from the wavelength convert part 10 of first embodiment in this respect.Heat dissipating layer 4 be external diameter with
First porous ceramic layer, 1 roughly the same and concentric ring-type.The phase of wavelength convert part 10 of other structures and first embodiment
Together.Heat dissipating layer 4 is set by the interarea in porous ceramic layer 1, according to it is stated that the reasons why, produce in luminescent coating 2, conduct extremely
The heat of first porous ceramic layer 1 discharges easily by heat dissipating layer 4 to outside.The thermal conductivity factor of heat dissipating layer 4 be preferably 5W/mK with
Upper, more than 10W/mK, particularly preferably more than 20W/mK.
As heat dissipating layer 4, such as dense ceramic layers can be enumerated.The porosity of dense ceramic layers is preferably shorter than 20 bodies
Product %, preferably below 15 volume %, particularly preferably below 10 volume %.If the porosity of dense ceramic layers is too high,
Thermal conductivity factor is easily reduced, and thermal diffusivity easily declines.On the other hand, although the lower limit of the porosity of dense ceramic layers is not special
Limit, but be more than 0.2 volume % in reality.
Dense ceramic layers can be enumerated comprising aluminum oxide, magnesia, zirconium oxide, titanium oxide, niobium oxide, zinc oxide, oxidation
The material of yttrium, aluminium nitride, boron nitride, carborundum etc..These both can be used alone, and two or more can also be used in combination.Its
In, aluminum oxide, magnesia, zirconium oxide are high and cheap because of thermal conductivity factor, it is advantageous to.
As heat dissipating layer 4, the material for including the metals such as sapphire, aluminium, silver, copper is can also be than that described above.
The thickness of heat dissipating layer 4 is preferably 0.2~2mm, 0.3~1.5mm, particularly preferably 0.5~1mm.If heat dissipating layer 4
Thickness it is too small, then be not easy to obtain sufficient radiating effect.On the other hand, if the thickness of heat dissipating layer 4 is excessive, wavelength be present
Converting member 20, furthermore become big trend using the quality of its luminescent device.In addition, by the wavelength convert of colyliform
In the case that part 20 is used for projector light source, exist the motor to rotating wavelength convert part 20 load become it is big or
Vibration caused by person's rotation becomes the problem of big and damaged.
Wavelength convert part 20 can make like that according to following.
The first porous ceramic layer 1 is made in the same manner as the method for wavelength convert part 10 and uses raw cook.
Then, heat dissipating layer 4 is prepared.In the case where using dense ceramic layers as heat dissipating layer 4, with wavelength convert part 10
Porous ceramic layer 1 similarly obtain dense ceramic layers raw cook with the preparation method of raw cook.By with than higher temperatures to densification
Ceramic layer is sintered with raw cook, obtains the low dense ceramic layers of porosity.Specifically, preferably by dense ceramic layers raw cook
More than about 1500 DEG C, preferably more than 1600 DEG C be fired.In addition, the average grain diameter (D50) of the ceramic powders as raw material
It is smaller, more it is easily reduced the porosity of dense ceramic layers.
Then, the first porous ceramic layer 1 with raw cook and the lamination of heat dissipating layer 4 and is fired, it is porous is derived from first
The laminated body that ceramic layer 1 is engaged and formed with heat dissipating layer 4.
By with being connect in the same manner as the method for wavelength convert part 10 on the first porous ceramic layer 1 of the laminated body obtained
Close luminescent coating 2, low-index layer 3 is further engaged on luminescent coating 2, obtain wavelength convert part 20.
Alternatively, it is also possible to which luminescent coating 2, low-index layer 3 first are engaged in into the first porous ceramic layer 1, engagement afterwards dissipates
Thermosphere 4.
The wavelength convert part of (3) the 3rd embodiments
Fig. 3 is the figure of a part for the lateral section for the wavelength convert part for representing third embodiment of the present invention.At this
With interarea formed with the first porous ceramic layer 1 it is opposite side in heat dissipating layer 4 in the wavelength convert part 30 of embodiment
Interarea, it is provided with the second porous ceramic layer 1 ' with 1 roughly the same shape of the first porous ceramic layer.Other structures are implemented with second
The wavelength convert part 20 of mode is identical.By using such structure, when the raw cook of manufacturing process is fired in wavelength convert
Part 30 is not likely to produce warpage.
On the porosity of the second porous ceramic layer 1 ' and the concrete example of the scope of thickness and material, can select and the
The scope and material of the identical porosity of one porous ceramic layer 1 and thickness.From ablating work procedure when effectively suppressing manufacture
From the viewpoint of the warpage issues of wavelength convert part 30, the preferred hole of the first porous ceramic layer 1 and the second porous ceramic layer 1 '
Gap rate, thickness and material it is at least one substantially the same, more preferably all of which is substantially the same.
The wavelength convert part of (4) the 4th embodiments
Fig. 4 (a) is the top view for the wavelength convert part 40 for representing the 4th embodiment of the present invention, and Fig. 4 (b) is Fig. 4
(a) A-A ' sectional views.In the wavelength convert part 40 of present embodiment, formed with luminescent coating 2, low-index layer 3
The part in region be provided with notch C, it is different from wavelength convert part 30 in this respect.The composition and wavelength convert of each layer
Part 30 is identical.In notch C, the first porous ceramic layer 1, the second porous ceramic layer 1 ', luminescent coating 2, the and of low-index layer 3
Heat dissipating layer 4 is not formed, turns into the form of a part of complete collyriculum of wheel periphery, it is impossible to transmit exciting light.Thus, by using
Wavelength convert part 40, can obtain can will change excitation wavelength in luminescent coating 2 and take out the situation of fluorescence and incite somebody to action
The luminescent device that both situations that exciting light directly takes out suitably are distinguished and used.
(luminescent device)
The luminescent device of the present invention has above-mentioned wavelength convert part (in wavelength convert part 10~40 any one)
With the light source that exciting light is irradiated to wavelength convert part.As light source, LED and LD etc. can be used.Excited from what light source projected
Light carries out wavelength convert in the luminescent coating of wavelength convert part and sends fluorescence, and the fluorescence is anti-in the first porous ceramic layer
Penetrate, from exciting light irradiation side phase the same side to project fluorescence.
[embodiment]
Hereinafter, the wavelength convert part of the present invention is described in detail by embodiment.But the present invention is not by following
Embodiment any restriction.
Table 1 represents examples and comparative examples of the present invention.
[table 1]
(embodiment 1)
(making of porous ceramic layer raw cook)
Relative to Al2O3Powder (average grain diameter (D50)：1 μm), polybutyl methacrylate is properly added as bonding agent,
Methyl ethyl ketone is properly added as plasticizer, butyl benzyl phthalate is properly added as solvent, mix within 24 hours
Refining, thus obtains slurry.Using doctor blade method by resulting slurry coats on polyethylene terephthalate (PET) film,
Make its drying, thus obtain porous ceramic layer raw cook (thickness 0.32mm).
(making of luminescent coating raw cook)
In terms of mole %, with as SiO2：58%th, Al2O3：6%th, B2O3：17%th, Li2O：8%th, Na2O：8%th, K2O：3%
Glass composition mode allocate raw material, obtain film-like glass using quenching method is melted.Will be resulting membranaceous using ball mill
Glass crushes, and obtains average grain diameter (D50) it is 1 μm of glass powder.
By resulting glass powder and YAG (Y3Al5O12) fluorophor powder (average grain diameter (D50)：15 μm) with as glass
The volume %, YAG (Y of glass powder 303Al5O12) fluorophor powder 70 volume % mode allocated, entered using vibration mixer
Row mixing.Bonding agent, plasticizer, solvent etc. are properly added in resulting mixed-powder 50g, be kneaded within 24 hours, by
This obtains slurry.Using doctor blade method by resulting slurry coats in PET film, making its drying, luminescent coating use is thus obtained
Raw cook (thickness 0.12mm).
(making of low-index layer raw cook)
Bonding agent, plasticizer, solvent are properly added in the glass powder 50g used in making of the luminescent coating with raw cook
Deng, carry out 24 hours be kneaded, thus obtain slurry.Do it coated in PET film resulting slurry using doctor blade method
It is dry, thus obtain low-index layer raw cook (thickness 0.03mm).
(making of wavelength convert part)
Dense ceramic layers (M Co., Ltd. ARUWA Al using porous ceramic layer by the use of raw cook and as heat dissipating layer2O3Piece, system
Name of an article HA-96-2；Thickness 0.8mm, thermal conductivity factor 23W/mK) overlapping, picked using hot pressing, applied 5 minutes with 100 DEG C
10MPa pressure, make both closely sealed, further entered in an atmosphere with 600 DEG C of progress ungrease treatment in 8 hours with 1400 DEG C afterwards
Row is fired for 5 hours, is thus made by this 2 layers ceramic layer laminated body formed of porous ceramic layer and dense ceramic layers.
In ceramic layer laminated body, porous ceramic layer is used and the porosity of dense ceramic layers passes through the reflection in section is electric
The area ratios of aperture sections is calculated after subgraph binaryzation to ask for.In addition, the light reflectivity of ceramic layer laminated body uses
Shimadzu Seisakusho Ltd. UV-2500PC, asked for by the average value of the intensity of reflected light of 400~800nm of wavelength each wavelength.
Then, luminescent coating raw cook is overlapped on the porous ceramic layer of ceramic layer laminated body, is further overlapped thereon
Low-index layer raw cook, is picked using hot pressing, with 100 DEG C of applications, 5 minutes 10MPa pressure, thus makes both closely sealed, afterwards
In an atmosphere with 500 DEG C of progress ungrease treatment in 7 hours, further with 700 DEG C fire within 1 hour, thus make wavelength convert
Part.
(embodiment 2)
Porous ceramic layer is made similarly to Example 1 with raw cook (thickness 0.26mm).By porous ceramic layer raw cook weight
Folded 4 layers, picked using hot pressing with 100 DEG C of applications, 5 minutes 10MPa pressure, thus carry out it is closely sealed, afterwards in an atmosphere with 600
DEG C carry out ungrease treatment in 8 hours, with 1400 DEG C carry out 5 hours fire, thus obtain porous ceramic layer.Similarly to Example 1
Determine the light reflectivity of porous ceramic layer.It the results are shown in table 1.
The luminescent coating raw cook obtained in embodiment 1 is overlapped on porous ceramic layer, low folding is further overlapped thereon
Penetrate rate layer raw cook, using hot pressing pick with 100 DEG C application 5 minutes 10MPa pressure, thus carry out it is closely sealed, afterwards in air
In with 500 DEG C progress ungrease treatment in 7 hours, further with 700 DEG C carry out 1 hour fire, thus make wavelength convert part.
(comparative example)
In dense ceramic layers (M Co., Ltd. ARUWA Al2O3Piece, product name HA-96-2；Thickness 0.635mm) on overlap
The luminescent coating raw cook obtained in embodiment 1, low-index layer raw cook is further being overlapped thereon, is being picked using hot pressing,
With 100 DEG C application 5 minutes 10MPa pressure, thus carry out it is closely sealed, afterwards in an atmosphere with 500 DEG C carry out degreasing in 7 hours at
Reason, further with 700 DEG C fire within 1 hour, thus obtain wavelength convert part.In addition, measure causes similarly to Example 1
The light reflectivity of close ceramic layer.It the results are shown in table 1.
(evaluating characteristics)
To according to the above-mentioned each wavelength convert part made like that, fluorescence peak intensity and fluorophor are determined like that according to following
The surface temperature of layer.It the results are shown in table 1.In addition, in the assay using the sample (thickness of each layer of the size shown in Fig. 5
Degree is as shown in table 1).
Surface (surface formed with luminescent coating, low-index layer) to the wavelength convert part that is rotated with 8000rpm,
Laser is irradiated from wavelength 440nm blue laser light source to export 30W.Using small-sized optical splitter, (USB-4000 marine opticses are public
Department's system) resulting fluorescence is received by optical fiber, obtain luminescent spectrum.Fluorescence peak intensity is read from luminescent spectrum.In addition, use
FLIR thermal infrared imagers i5 determines the surface temperature of luminescent coating.
As known from Table 1, the fluorescence peak intensity of the wavelength convert part of embodiment 1,2 is more than 1279 (a.u.), and is compared
The fluorescence peak intensity of the wavelength convert part of example is 1112 (a.u.), poor.In addition we know, enter when to embodiment 1 and embodiment 2
Row relatively when, in the case where using the laminated body of porous ceramic layer and dense ceramic layers as reflection layer, light reflectivity obtains
To raising.In addition, in the case of porous ceramics layer laminate dense ceramic layers, the temperature of luminescent coating also reduces, it is believed that fluorescence
Thus the temperature quenching of body mitigates.Based on the two reasons, the wavelength convert part of embodiment 1 and the wavelength of embodiment 2 are considered
Converting member compares, and fluorescence peak intensity uprises.
Claims (13)
- A kind of 1. wavelength convert part, it is characterised in that including：Porosity is more than 20 volume % the first porous ceramic layer；Formed on the first porous ceramic layer and the luminescent coating containing fluorophor；WithForm the low-index layer of the refractive index on luminescent coating and below the refractive index with fluorophor.
- 2. wavelength convert part as claimed in claim 1, it is characterised in that：Luminescent coating is engaged by welding or inorganic bonding layer with the first porous ceramic layer.
- 3. wavelength convert part as claimed in claim 1 or 2, it is characterised in that：First porous ceramic layer contains at least one kind of in aluminum oxide, magnesia and zirconium oxide.
- 4. such as wavelength convert part according to any one of claims 1 to 3, it is characterised in that：In the first porous ceramic layer with the interarea that the interarea formed with luminescent coating is opposite side formed with heat dissipating layer.
- 5. such as wavelength convert part according to any one of claims 1 to 4, it is characterised in that：Heat dissipating layer is the dense ceramic layers that porosity is less than 20 volume %.
- 6. wavelength convert part as claimed in claim 5, it is characterised in that：Dense ceramic layers contain at least one kind of in aluminum oxide, magnesia and zirconium oxide.
- 7. the wavelength convert part as any one of claim 4~6, it is characterised in that：Heat dissipating layer and the interarea formed with the first porous ceramic layer be opposite side interarea, formed with the volume % of porosity 20 The second porous ceramic layer above.
- 8. wavelength convert part as claimed in claim 7, it is characterised in that：The porosity of first porous ceramic layer and the second porous ceramic layer, thickness and/or material are substantially the same.
- 9. such as wavelength convert part according to any one of claims 1 to 8, it is characterised in that：Luminescent coating is formed by disperseing fluorophor in inorganic bond.
- 10. such as wavelength convert part according to any one of claims 1 to 9, it is characterised in that：Low-index layer is made up of glass.
- 11. such as wavelength convert part according to any one of claims 1 to 10, it is characterised in that：It is colyliform.
- A kind of 12. luminescent device, it is characterised in that including：Wavelength convert part any one of claim 1~11；WithThe light source of luminescent coating irradiation exciting light into wavelength convert part.
- 13. luminescent device as claimed in claim 12, it is characterised in that：Used as projector light source.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-143912 | 2016-07-22 | ||
| JP2016143912A JP2018013670A (en) | 2016-07-22 | 2016-07-22 | Wavelength conversion member and light emitting device prepared therewith |
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| CN107644932A true CN107644932A (en) | 2018-01-30 |
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| CN201720718530.9U Expired - Fee Related CN207320161U (en) | 2016-07-22 | 2017-06-20 | Wavelength convert component and use its luminescent device |
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| CN201720718530.9U Expired - Fee Related CN207320161U (en) | 2016-07-22 | 2017-06-20 | Wavelength convert component and use its luminescent device |
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| Country | Link |
|---|---|
| JP (1) | JP2018013670A (en) |
| CN (2) | CN107644932A (en) |
| TW (1) | TW201804171A (en) |
| WO (1) | WO2018016357A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107209447A (en) * | 2015-02-17 | 2017-09-26 | 精工爱普生株式会社 | Wavelength converter, lighting device and projecting apparatus |
| CN111699420A (en) * | 2018-02-14 | 2020-09-22 | 日本特殊陶业株式会社 | Optical wavelength conversion device |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6658074B2 (en) * | 2016-02-24 | 2020-03-04 | セイコーエプソン株式会社 | Wavelength conversion element, light source device and projector |
| JP6891648B2 (en) | 2017-06-07 | 2021-06-18 | セイコーエプソン株式会社 | Wavelength converters, wavelength converters, light source devices and projectors |
| CN112666780B (en) | 2019-10-15 | 2022-06-24 | 台达电子工业股份有限公司 | Wavelength conversion device |
| TWI718707B (en) * | 2019-10-15 | 2021-02-11 | 台達電子工業股份有限公司 | Wavelength conversion device |
| KR20220124791A (en) * | 2020-06-08 | 2022-09-14 | 니뽄 도쿠슈 도교 가부시키가이샤 | A fluorescent plate, a wavelength conversion member, and a light source device |
| CN113917776B (en) * | 2020-07-09 | 2023-03-24 | 中强光电股份有限公司 | Wavelength conversion device and projection device |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010082286A1 (en) * | 2009-01-13 | 2010-07-22 | 株式会社小糸製作所 | Light emitting module and lighting fixture unit |
| JP2012160534A (en) * | 2011-01-31 | 2012-08-23 | Harison Toshiba Lighting Corp | Led light source unit and lighting device |
| JP2013038115A (en) * | 2011-08-04 | 2013-02-21 | Koito Mfg Co Ltd | Light wavelength conversion unit |
| JP2013130605A (en) * | 2011-12-20 | 2013-07-04 | Panasonic Corp | Light source device and projector |
| CN103968332B (en) * | 2013-01-25 | 2015-10-07 | 深圳市光峰光电技术有限公司 | A kind of Wavelength converter, light-emitting device and optical projection system |
| CN105135366B (en) * | 2013-03-21 | 2017-04-12 | 深圳市绎立锐光科技开发有限公司 | Wavelength conversion device and manufacturing method thereof and related light emitting device |
| JP6394144B2 (en) * | 2013-11-08 | 2018-09-26 | 日本電気硝子株式会社 | Fluorescent wheel for projector and light emitting device for projector |
| WO2015077357A1 (en) * | 2013-11-22 | 2015-05-28 | Nitto Denko Corporation | Light extraction element |
| JP6303735B2 (en) * | 2014-04-02 | 2018-04-04 | 日本電気硝子株式会社 | Fluorescent wheel for projector and light emitting device for projector |
| WO2015151686A1 (en) * | 2014-04-04 | 2015-10-08 | シャープ株式会社 | Substrate for light emitting devices, and light emitting device |
| CN105322433B (en) * | 2014-05-28 | 2020-02-04 | 深圳光峰科技股份有限公司 | Wavelength conversion device and related light emitting device |
| JP6575923B2 (en) * | 2014-09-26 | 2019-09-18 | 日本電気硝子株式会社 | Wavelength conversion member and light emitting device using the same |
-
2016
- 2016-07-22 JP JP2016143912A patent/JP2018013670A/en active Pending
-
2017
- 2017-04-06 TW TW106111515A patent/TW201804171A/en unknown
- 2017-06-20 CN CN201710469684.3A patent/CN107644932A/en active Pending
- 2017-06-20 CN CN201720718530.9U patent/CN207320161U/en not_active Expired - Fee Related
- 2017-07-07 WO PCT/JP2017/025024 patent/WO2018016357A1/en active Application Filing
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107209447A (en) * | 2015-02-17 | 2017-09-26 | 精工爱普生株式会社 | Wavelength converter, lighting device and projecting apparatus |
| CN111699420A (en) * | 2018-02-14 | 2020-09-22 | 日本特殊陶业株式会社 | Optical wavelength conversion device |
| CN111699420B (en) * | 2018-02-14 | 2023-01-13 | 日本特殊陶业株式会社 | Optical wavelength conversion device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2018013670A (en) | 2018-01-25 |
| TW201804171A (en) | 2018-02-01 |
| CN207320161U (en) | 2018-05-04 |
| WO2018016357A1 (en) | 2018-01-25 |
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