CN203489180U - Wavelength conversion device, light source system of wavelength conversion device and projection system of wavelength conversion device - Google Patents
Wavelength conversion device, light source system of wavelength conversion device and projection system of wavelength conversion device Download PDFInfo
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- CN203489180U CN203489180U CN201320634064.8U CN201320634064U CN203489180U CN 203489180 U CN203489180 U CN 203489180U CN 201320634064 U CN201320634064 U CN 201320634064U CN 203489180 U CN203489180 U CN 203489180U
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- G—PHYSICS
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- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0294—Diffusing elements; Afocal elements characterized by the use adapted to provide an additional optical effect, e.g. anti-reflection or filter
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
- G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
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- G02B5/0284—Diffusing elements; Afocal elements characterized by the use used in reflection
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/007—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light
- G02B26/008—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light in the form of devices for effecting sequential colour changes, e.g. colour wheels
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Projection Apparatus (AREA)
Abstract
The utility model relates to a wavelength conversion device, a light source system of the wavelength conversion device and a projection system of the wavelength conversion device. The wavelength conversion device comprises a supporting part and a plurality of wavelength conversion modules which are spliced mutually. Each wavelength conversion module comprises a ceramic support and fluorescent powder, and the supporting part enables the wavelength conversion modules to keep relatively fixed. The light source system and the projection system respectively comprise the wavelength conversion device. According to the wavelength conversion device, the light source system and the projection system, the ceramic support of the fluorescent powder is made of ceramic materials, the ceramic support is resistant to high temperature, and the situation that it is hard for the fluorescent powder to be attached to the ceramic support due to the fact that the ceramic support deforms because of the high temperature is avoided. Meanwhile, the mode that the wavelength conversion modules are spliced is used to obtain the modularized wavelength conversion device, so that the wavelength conversion device cannot break easily and is more flexible in design and shorter in manufacturing cycle.
Description
Technical field
The utility model relates to illumination and Display Technique field, particularly relates to Wavelength converter and light-source system thereof, optical projection system.
Background technology
Adopt solid state light emitter as laser diode (LD, Laser Diode) or the exciting light that sends of light emitting diode (LED, the Light Emitting Diode) wavelength that can produce high brightness as the Wavelength conversion method of fluorescent material with excitated fluorescent powder be different from the light of excitation wavelength.This scheme has efficiently, advantage cheaply, and having become existing light source provides white light or monochromatic mainstream technology.In this kind of scheme, light source comprises excitation source and Wavelength converter, wherein Wavelength converter comprises reflective substrate and is coated in the phosphor sheet in reflective substrate, and the motor for driving reflective substrate to rotate, the hot spot that the exciting light from excitation source is formed on phosphor sheet acts on this phosphor sheet by circular path.
Conventional reflective substrate is a specular aluminium substrate, and by aluminium base with high reflection layer is stacked forms, wherein high reflection layer generally adopts rafifinal or high purity silver.And be coated in phosphor sheet in reflective substrate generally by silica gel by the bonding slabbing of fluorescent powder grain.Because the heat conductivility of silica gel is poor, the easily blackout of at high temperature working, causes whole device and is not suitable under high-power excitation source working.
In order to improve the colour wheel performance under high-power applications background, can adopt glass to substitute silica gel as bonding agent.But glass dust as bonding agent need to fluorescent material at high temperature sintering just can be solidified into phosphor powder layer, and the sintering temperature of glass dust is higher, often more than 500 ℃, be not suitable for using metal substrate, especially aluminium base, because that the metal sheet of high heat conduction at high temperature there will be is softening, distortion, oxidation, the too high problem of thermal expansion, cause the phosphor powder layer of sintering to be difficult to adhere to simultaneously.
Utility model content
The technical problem that the utility model mainly solves be to provide a kind of can be high temperature resistant and structure can keep stable Wavelength converter and light-source system thereof, optical projection system.
The utility model embodiment provides a kind of Wavelength converter, the wavelength modular converter that comprises supporting member and a plurality of mutual amalgamations, described in each, wavelength modular converter comprises ceramic monolith and is placed in the fluorescent material on described ceramic monolith, and described supporting member keeps relatively fixing by described a plurality of wavelength modular converters.
Preferably, described in each, the fluorescent material on ceramic monolith is to be stimulated to produce the monochromatic fluorescent material of solid color Stimulated Light.
Preferably, the monochromatic fluorescent material on different described ceramic monoliths is all identical, or different monochromatic fluorescent material is positioned on different ceramic monoliths.
Preferably, the fluorescent material of one of them described wavelength modular converter is laid on described ceramic monolith one side surface and forms phosphor powder layer.
Preferably, described phosphor powder layer also comprises the first vitreum of bonding described fluorescent material.
Preferably, described ceramic monolith is that thermal conductivity factor is higher than the ceramic material of 80W/mK.
Preferably, between phosphor powder layer and described ceramic monolith surface, be also provided with reflecting layer, described reflecting layer is the diffuse reflector of the secondary vitreous that comprises white scattering particles and bonding described white scattering particles, or described reflecting layer is for being plated in the lip-deep total reflection medium film of described ceramic monolith.
Preferably, described total reflection dielectric layer is silverskin or aluminium film.
Preferably, one of them described wavelength modular converter is dispersed in the fluorescence ceramics forming in described ceramic monolith for described fluorescent material.
Preferably, described fluorescence ceramics is YAG devitrified glass or sintering YAG pottery.
Preferably, the bottom surface of described fluorescence ceramics is provided with the diffuse reflector of the secondary vitreous that comprises white scattering particles and bonding described white scattering particles, or is coated with total reflection medium film.
Preferably, described reflecting medium film is silverskin or aluminium film.
Preferably, on described total reflection medium film surface, be coated with coat of metal.
Preferably, described supporting member is a base plate, and described a plurality of wavelength modular converters are fixedly installed to respectively on a side surface of described base plate, and described fluorescent material is positioned at the side away from described base plate of described wavelength modular converter.
Preferably, the material of described base plate is the composite that metal, metal alloy or metal and inorganic material form.
Preferably, the surface of described base plate is provided with annular groove, and described a plurality of wavelength modular converters all become circular-arc, and are combined into annular in described annular groove.
Preferably, between described base plate and described wavelength modular converter, by bonding or be welded and fixed, carry out the mixed slurry that bonding bonding agent is organic adhesive, elargol or silica gel and heat filling particle.
Preferably, described heat filling particle is one or more in aluminium oxide, aluminium nitride, boron nitride, yittrium oxide, zinc oxide, titanium oxide.
Preferably, different described wavelength modular converters are different from the fixed form between described base plate.
Preferably, described Wavelength converter also comprises driving arrangement, and described driving arrangement drives described supporting member motion.
The utility model also relates to a kind of light-source system, comprise the excitation source that produces exciting light, also comprise Wavelength converter as above, the fluorescent material of described Wavelength converter is placed in the light path of the exciting light that described excitation source produces, and exciting light is converted to Stimulated Light sends.
The utility model also relates to a kind of optical projection system, and for projection imaging, it comprises above-mentioned light-source system.
Compared with prior art, the utility model comprises following beneficial effect:
1, adopt ceramic monolith to replace traditional mirror metal plate, because the fusing point of ceramic material is higher than metal, can tolerate the temperature higher than metal; And the interface resistance between ceramic monolith and fluorescent material is lower, the heat of phosphor powder layer can be conducted to ceramic monolith, and be dispersed in air, thereby improve the heat endurance of Wavelength converter.And the thermal coefficient of expansion of ceramic monolith is low, not yielding under high temperature, and approach with the thermal coefficient of expansion of phosphor powder layer, even if micro-deformation can not cause phosphor powder layer to be difficult to adhere to yet.
2, the toughness of material in view of ceramic monolith is low, fragility is high, the Wavelength converter that the carrier substrates of fluorescent material is made by ceramic material is entirely when bearing high strength Ear Mucosa Treated by He Ne Laser Irradiation, the difference that interior exterior domain expands is larger, this inhomogeneous expansion can make pottery crack, Crack Extension can cause wheel to blow up, break, once occur breaking, can make whole wheel entirely ineffective.; In the utility model, adopt ceramic monolith piecemeal is arranged, further be attached on the supporting member that metal, metal alloy or metal-inorganic composite materials make, compare different fluorescent material is all arranged on the ceramic monolith of same monoblock, ceramic monolith occurs that crackle, breakage, the probability even bursting obviously reduce;
The size of the ceramic monolith after piecemeal is less, and the variations in temperature causing because of Ear Mucosa Treated by He Ne Laser Irradiation in rotation process is more even, is not prone to crackle.Even there is crackle under minimum probability, because its face is fixed on supporting member contiguously, can not disperse and cause the inefficacy of Wavelength converter because of fracture, and the material of supporting member have also determined that it is not easy to break.
3, can reduce the preparation difficulty of Wavelength converter, shorten the production cycle.In a ceramic bases, the disposable blade coating difficulty that completes different fluorescent material bisques is larger, and different colours section needs gradation blade coating and sintering, and fabrication cycle is longer, and for example four phosphor powder layers need to be brushed and sintering successively, 4 sintering periods of level.
And in the utility model, because each phosphor powder layer is divisible in different wavelength modular converters, size is less, be easy to a blade coating moulding, and the phosphor powder layer of different colours can be distinguished sintering simultaneously, shorten colour wheel fabrication cycle, for example above-mentioned four phosphor powder layers only need two sintering periods in the utility model.
4, be easier to carry out special processes.The large-sized ceramic bases of one monoblock, if while having specific demand to carry out the treatment process such as surface finish, solder bonding metal, surface coating to it, size more cost is higher, difficulty of processing is larger.
Each ceramic monolith size of the present utility model is less and can adjust according to actual needs, and cost, difficulty that small size parts is carried out special processing are all lower.
5, modular organization is more flexible, is conducive to prepare high performance wavelength conversion equipment.When reflecting layer, phosphor powder layer whole brushings on a monolithic ceramic substrate all, the performance limitations (as used the red fluorescence bisque of red fluorescence powder can not bear more than 600 ℃ high temperature) that all needs to consider each functional layer in ceramic bases when carrying out special process processing (as heat treatments such as sintering, annealing), when the high-performance colour wheel of design complex configurations, can be forced to take compromise scheme because of these performance limitations, be unfavorable for bringing into play various fluorescent material or various preparation technologies' best efficiency.
In the utility model, different wavelength modular converters can corresponding different designs the size of fluorescent material color desired zone cut apart, according to luminous, the heat generation characteristic of different colours fluorescent material, use different reflecting layer or heat conduction technique, as ceramic surface metallization, heat filling particle, electroplate, etc., each color segment can be prepared respectively and without the performance impact of considering other sections, be conducive to design preparation high-performance colour wheel under its optimised process.
6, reduce consumptive material, save cost.The modular Wavelength converter of the utility model is also conducive to the quality control of product, traditional colour wheel needs only some fluorescent material interval and has gone out quality problems, whole colour wheel has just cancelled, and the Wavelength converter the utility model proposes, there are quality problems in some wavelength modular converters, can manufacture again separately a module as a supplement, reduce product control cost.
Accompanying drawing explanation
Figure 1A be the utility model Wavelength converter embodiment mono-partly cut open figure;
Figure 1B is the top view of Wavelength converter shown in Figure 1A;
Fig. 2 is the top view of the embodiment bis-of the utility model Wavelength converter
Fig. 3 be the utility model Wavelength converter embodiment tetra-partly cut open figure;
Fig. 4 A be the utility model Wavelength converter embodiment five partly cut open figure;
Fig. 4 B is the top view of Wavelength converter shown in Fig. 4 A;
Fig. 5 A be the utility model Wavelength converter embodiment six partly cut open figure;
Fig. 5 B is the top view of Wavelength converter shown in Fig. 5 A;
Fig. 6 be the utility model Wavelength converter embodiment seven partly cut open figure;
Fig. 7 A be the utility model Wavelength converter embodiment eight partly cut open figure;
Fig. 7 B is the top view of Wavelength converter shown in Fig. 7 A.
The specific embodiment
Below in conjunction with drawings and embodiments, the utility model embodiment is elaborated.
Embodiment mono-
Refer to Figure 1A, 1B, in the present embodiment, Wavelength converter comprises supporting member 104 and two wavelength modular converter 108a, 108b, and each wavelength modular converter comprises a ceramic monolith 103 and is arranged on fluorescent material and the reflecting layer 102 on ceramic monolith 103.
As shown in Figure 1A, 1B, supporting member 104 is disc base plate, the composite preferably consisting of metal, metal alloy or metal and inorganic material is made, metal is as aluminium, copper, silver etc., metal alloy is as brass, aluminium alloy, albronze etc., metal-inorganic composite materials is the composite material of metal material and inorganic material, such as diamond-copper, boron nitride-copper etc.Supporting member is provided with an annular region, and this annular region is centered by the center of circle of disc base plate.
Ceramic monolith 103 has two, is respectively two semicircular arc sheets, is arranged in the annular region of base plate to the two phase amalgamation, forms circular that shape matches with it.Preferably, ceramic monolith 103 is aluminium oxide, aluminium nitride, silicon nitride, carborundum, boron nitride or beryllium oxide.They are all the ceramic wafers with compact texture, do not have loose structure.The thermal conductivity of these materials is more than 80W/mK, and fusing point is substantially more than 2000 degrees Celsius, so they are when realizing heat conduction, can also tolerate higher temperature.Certainly, thermal conductivity is required, not that in very high occasion, ceramic monolith 103 also can adopt the ceramic wafer of other kinds to make.It should be noted that, the material of two ceramic monoliths 103 can be identical, also can be different, do not limit herein.
In practice, the viscose glue that can adopt high heat conduction for example elargol or the silica gel of inserting heat filling particle bonds to the bottom surface of this ceramic monolith 103 in annular region, and above-mentioned heat filling particle is one or more in aluminium oxide, aluminium nitride, boron nitride, yittrium oxide, zinc oxide, titanium oxide.
On the end face of each ceramic monolith, be respectively equipped with reflecting layer 102, be used for reflected fluorescent light powder the sent Stimulated Light that is stimulated.In the present embodiment, reflecting layer 102 is total reflection medium film, such as silverskin, aluminium film etc.This total reflection medium film can be deposited on ceramic monolith end face by modes such as plating, chemical plating, electron beam transpiration, plasma sputtering, evaporations.
Fluorescent material is arranged on and on surface, reflecting layer, forms phosphor powder layer 101, this fluorescent material is for absorbing exciting light and being excited to produce the light that is different from excitation wavelength, YAG(yttrium-aluminium-garnet for example) fluorescent material, YAG fluorescent material can absorb blue light, ultraviolet light etc. and produce yellow Stimulated Light.In addition, fluorescent material can also be red light fluorescent powder, for absorbing exciting light to produce red Stimulated Light; Or can also be the fluorescent material of other color Stimulated Light of generation such as green light fluorescent powder.In the present embodiment, the ceramic monolith of a wavelength modular converter 108a is provided with the phosphor powder layer that red fluorescence powder forms, and on the ceramic monolith of another wavelength modular converter 108b, half region is provided with yellow fluorescent powder, and second half region is provided with green emitting phosphor.Certainly, the monochromatic phosphor combination of other colors and to be laid on any one of them ceramic monolith 103 be also feasible.
Phosphor powder layer 101 is the integral body being packaged into by fluorescent material and bonding agent, and bonding agent can be selected silica gel bonding agent, its stable chemical nature, has higher mechanical strength.But silica gel bonding agent is can tolerable temperature lower, generally at 300 degrees Celsius to 500 degrees Celsius.In order to be applied in powerful light-emitting device, preferably, adopt inorganic adhesive by integral body of the bonding one-tenth of fluorescent material, such as waterglass, glass dust etc., sinter vitreum into, to realize resistant to elevated temperatures reflective fluorescent material wheel.
Preferably, phosphor powder layer 101 comprises that fluorescent material and the first glass dust slurry sintering form, and the first glass dust is sintered into the first vitreum.Wherein, glass dust is a kind of glass isotropic body of amorphous granular shape, the high and stable chemical nature of its transparency.The kind of glass dust has the mixture of a kind of in silicate glass, lead silicate glass, aluminium borosilicate glass, aluminate glass, soda-lime glass, quartz glass or at least two kinds.The above-mentioned any one or several glass dust of the optional use of the first glass dust.Because the first glass dust needs also will to conduct heat by transmission exciting light simultaneously, be therefore preferably pyrex powder, its stable in properties, transmitance is high, and has higher thermal conductivity with respect to other glass dust.Certainly, for the heat resistance of different colours fluorescent material, can select the glass dust of different softening point to match.
Driving arrangement 105 is fixing with supporting member 104, for driving supporting member 104 to drive wavelength modular converter 108a, 108b around its disc centre axle rotation, exciting light is periodically radiated on each location point of the circumference on annular phosphor powder layer 101.In the present embodiment, this driving arrangement 105 is specially motor.
In the present embodiment, ceramic monolith 103 is divided into two, forms a wavelength modular converter 108a/108b respectively, and will after the amalgamation of a plurality of wavelength modular converter, by supporting member 104, be adhesively fixed with the reflecting layer 102 of going up separately and phosphor powder layer 101.This modular structure, is made, in ceramic bases, is arranged the structure of different fluorescent material entirely with respect to whole piece base plate by ceramic material, have obvious advantage.
This be because, if all base plate is made by ceramic material entirely, when phosphor powder layer bearing high strength exciting light irradiates, the temperature of the subregion that ceramic bottom board contacts with phosphor powder layer is higher, and the temperature in other regions is lower, the thermal expansion degree varies sample of various piece on ceramic bottom board; Because the toughness of ceramic material is low, fragility is high, this thermal expansion degree varies sample easily causes breaking of substrate.
And in the utility model, ceramic monolith adopts partitioned organization, reduced pining down of temperature influence on each region, the heat on each ceramic monolith conducts on supporting member and dispels the heat respectively, avoids a region to occur that crackle causes whole Wavelength converter to work.Even if ceramic monolith is heated, inequality is broken, and only needs to change wherein one.In above-described embodiment one, ceramic monolith is two, obviously also can be divided into a plurality of identical or different arc sections, does not limit herein.A plurality of or polylith herein, all refer to two or two and more than.
Simultaneously, adopt metal, metal alloy or metal-inorganic composite materials are made supporting member, there is higher toughness and intensity, and only need to arrange in the annular region of fluorescent material, be provided with ceramic monolith on supporting member, and phosphor powder layer is arranged on this ceramic monolith, so that it is relatively even to be heated everywhere on ceramic monolith, greatly reduce ceramic monolith because the gap of different parts thermal expansion degree is compared with the probability that causes breaking greatly, even there is crackle in ceramic monolith under minimum probability, due to its still face contiguously fixed bonding on supporting member, can't cause because of fracture the inefficacy of Wavelength converter, and then extended service life of Wavelength converter.Meanwhile, the thermal conductivity of substrate is better, and ceramic monolith contacts and more contributes to the heat radiation of ceramic monolith with this substrate.
Further, Wavelength converter is ordered about by driving arrangement and rotates around central shaft, make diverse location on phosphor powder layer periodically by the light path of exciting light the optical excitation that is excited, the time being excited for each position so just turns to this location point in a flash, irradiation time section, its temperature is reduced greatly, and efficiency significantly improves.
Embodiment bis-
As shown in Figure 2, in the present embodiment, the description of supporting member 204, driving arrangement, ceramic monolith, viscose glue, reflecting layer and phosphor powder layer etc. all with embodiment mono-roughly the same, superfluous words no longer herein.
The difference of the present embodiment and embodiment mono-is, wavelength modular converter 208a, 208b, 208c have three, are respectively three circular arc sheets, and in the annular region of supporting member 204 by the bonding annular that splices.And the contained fluorescent material of phosphor powder layer on each ceramic monolith is to be stimulated to produce the monochromatic fluorescent material of solid color Stimulated Light, different monochromatic fluorescent material are positioned on different ceramic monoliths.
For example, as shown in Figure 2, the fluorescent material on three wavelength modular converter 208a, 208b, 208c is respectively red light fluorescent powder, yellow fluorescent powder and orange fluorescent powder.Obviously, the order of three kinds of fluorescent material can be changed as required, and the color of monochromatic fluorescent material can be selected and independent assortment.Meanwhile, a kind of monochromatic fluorescent material also can be coated in respectively on two ceramic monolith surfaces; And then ceramic monolith can have more than three, and the selection of the color of different monochromatic fluorescent material, order and distribution all can be expected.
The present embodiment is compared to the advantage of embodiment mono-, and different monochromatic fluorescent material are positioned on different ceramic monoliths.Because being equipped with, different monochromatic fluorescent material when the first identical or different glass dust is shaped to phosphor powder layer, there are different process conditions.For example, red fluorescence powder, orange fluorescent powder heat resisting temperature are lower, can only select transmitance cryogenic glass powder slightly poor but that fusing point is lower to mate with it, and sintering at a lower temperature; And yellow fluorescent powder, green emitting phosphor heat resistance are higher, can select the high melting point glass powder of high permeability to match, and under higher temperature sintering.
If fire respectively red fluorescence bisque and yellow fluorescence bisque in same ceramic bases, need to enter respectively stove sintering, and sintering temperature is different, this ceramic bases will be subject to heating for multiple times, be unfavorable for the stability of ceramic bases.
And employing the present embodiment, by the wavelength modular converter that contains different monochromatic fluorescent material, manufacture is complete separately respectively, then these modules are bonded on supporting member, can obviously shorten the production cycle.
Meanwhile, the difference of the monochromatic fluorescent material that modules contains according to self and glass dust, reflecting layer, ceramic monolith etc. designs different fabrication schemes, can obtain respectively optimum performance, need not be subject to the restriction of other fluorescent material or other components.
Embodiment tri-
In the present embodiment, except reflecting layer, other architectural features all can, with reference to embodiment mono-and embodiment bis-, below repeat no more.
The difference of the present embodiment and embodiment mono-and embodiment bis-is, reflecting layer adopts diffuse reflector to substitute total reflection medium film.
Diffuse reflector, between phosphor powder layer and ceramic monolith, comprises white scattering particles, mainly plays the effect of incident light being carried out to scattering.White scattering particles is generally salt or oxide-based powder, the ultrawhite monomer powders particles such as the aluminium oxide such as particle size in from 50 nanometers to 5 micrometer ranges, titanium oxide, aluminium nitride, magnesia, boron nitride, zinc oxide, zirconia, barium sulfate, or the mixture of at least two or more powder particles.These white scattering materials can not absorb light substantially, and stable in properties, can at high temperature not be oxidized or decompose.Consider that diffuse reflector needs good reflectivity and radiating effect, preferably selects the alumina powder that combination property is higher.
In order to reach better dispersion effect, white scattering particles needs have certain density and thickness in diffuse reflector, and the particle diameter of white scattering particles will be distributed in a suitable scope.The particle diameter of white scattering particles is less, accumulation finer and close, and its dispersion effect is better.On the other hand, hold intelligiblely, at same white scattering particles, the adding proportion of white scattering particles is higher, and the thickness of diffuse reflector is thicker, and reflectivity is just higher.But thermal resistance is larger when diffuse reflector is blocked up, so its thickness also needs to be controlled at a suitable scope.This density and thickness can be determined by experiment.
For instance, the surface that is ceramic monolith at aluminium nitride ceramics arrange a layer thickness be the alumina powder of 0.1-1mm as diffuse reflector, this alumina powder particle diameter is distributed as between 0.1-1 μ m, the mass ratio of itself and bonding agent is (1～10): between 1.The reflectivity with respect to specular aluminium film that now records diffuse reflector is 99.5%, almost identical with specular aluminium film.Certainly, the particle diameter of diffuse reflection particle, the thickness of diffuse reflector and density can also be other numerical value, and these numerical value can be tested and be obtained by several times according to prior art by those skilled in the art.
Similarly, white scattering particles also needs by integral body of the bonding one-tenth of bonding agent.Bonding agent can be also silica gel, waterglass etc.And preferably, white scattering particles, by the second glass dust sintering, forms secondary vitreous after the second glass dust sintering, white scattering particles is bonding.The material of second glass dust here select can with reference in embodiment mono-about the corresponding description of the first glass dust.Meanwhile, the second glass dust can be the glass dust identical with the first glass dust, can be also different glass dust.
Diffuse reflector can be to be fixed on ceramic monolith by the mode such as bonding, but fixes by bonding way, and due to the existence of glue, Presence of an interface layer between diffuse reflector and ceramic monolith, can stop the heat of diffuse reflector to conduct on ceramic monolith.Therefore, preferably, diffuse reflector direct sintering is at ceramic monolith, and now ceramic monolith and diffuse reflector have higher adhesion, and thermal conductivity is good.While glass compares glass with ceramic thermal coefficient of expansion and metal mates more, due to the higher thermal conductivity factor of having of ceramic monolith, also can as metal, play good conduction of heat.
What deserves to be explained is, moulding diffuse reflector on ceramic monolith in the ban, then when the sintering phosphor powder layer of diffuse reflector surface, for the process of sintering phosphor powder layer is not impacted diffuse reflector, the temperature of sintering phosphor powder layer is preferably below the softening temperature of the second glass dust, and therefore the softening temperature of the second glass dust will be higher than the softening temperature of the first glass dust.In like manner, moulding phosphor powder layer in the ban, then, when the sintering diffuse reflector of phosphor powder layer surface, sintering temperature is preferably below the softening temperature of the first glass dust, and the softening temperature of the second glass dust will be lower than the softening temperature of the first glass dust.In addition, consider softening temperature between the first glass dust and the second glass dust difference to some extent, and the softening temperature of pyrex powder is higher, this glass dust can be as higher a kind of of softening temperature in the first glass dust and the second glass dust.
The advantage of the present embodiment and embodiment mono-, embodiment bis-is, adopts diffuse reflector to replace total reflection medium film, with the combination of diffuse reflector and ceramic monolith, replaces traditional mirror metal plate.The diffuse reflector that wherein white scattering example forms carries out scattering to exciting light, can reach even identical effect close to mirror-reflection.
And white scattering particles at high temperature can be because the reactions such as oxidation, decomposition cause the change of its color, character yet, thereby weaken incident reflection of light, so diffuse reflector can withstand higher temperatures.Meanwhile, because the fusing point of ceramic carrier material is higher than metal, can tolerate the temperature higher than metal, under hot environment, work for a long time and the performance change such as be difficult for being oxidized, softening, so can substitute traditional metal substrate and reflecting surface thereof.
In diffuse reflector, secondary vitreous carries out white scattering particles bonding, and white scattering particles and air is isolated, to avoid white scattering particles to make moist in air, and makes diffuse reflector have higher intensity and transmitance.Simultaneously, when the bonding agent of phosphor powder layer and diffuse reflector is all glass dust, can be by phosphor powder layer at diffuse reflector surface sinter molding or diffuse reflector in phosphor powder layer surface sinter molding, make the stronger adhesion that has between the two, and can tolerate higher temperature.
In addition, adhere to the structure of phosphor powder layer compares with traditional specular aluminium substrate surface, its surperficial smoother, when phosphor powder layer is after the surface forming of specular aluminium substrate, the surface of phosphor powder layer and substrate contacts can be shunk, and part is separated with substrate, make the contact area of phosphor powder layer and specular aluminium substrate less, so the interface resistance between phosphor powder layer and specular aluminium substrate is larger.And for the Wavelength converter of ceramic monolith, because the surface of ceramic monolith and diffuse reflector is all relatively coarse, therefore, contact area between phosphor powder layer and diffuse reflector, between diffuse reflector and ceramic monolith is larger, make the interface resistance after Wavelength converter moulding less, thereby the heat of phosphor powder layer can be passed to ceramic monolith more, make Wavelength converter can tolerate higher temperature.
Embodiment tetra-
The present embodiment as shown in Figure 3, comprises that four wavelength modular converters (408a in figure and 408b, another two not shown) and 404, four wavelength modular converters of supporting member are spliced into annular and are fixed in the annular region on supporting member 404 surfaces.To the description of supporting member 404 with reference to embodiment mono-to embodiment tri-.
Each wavelength modular converter comprises fluorescence ceramics 401 and reflecting layer 403, and reflecting layer 403 is arranged between fluorescence ceramics 401 and supporting member 404 surfaces.Fluorescence ceramics 401 comprises ceramic monolith and is dispersed in the fluorescent material in ceramic monolith, is about to ceramic monolith and the synthetic identity element of phosphor powder layer of each wavelength modular converter in embodiment mono-to three.This fluorescence ceramics 401 is for a kind of optical excitation that can be excited is to produce the ceramic body of Stimulated Light, for example the Huang of YAG devitrified glass, sintering YAG pottery or other systems, green or red fluorescence is ceramic.The fluorescence ceramics 401 of each wavelength modular converter can adopt the fluorescence ceramics of same type, also can need to adopt the fluorescence ceramics of different colours or type according to design.
In the present embodiment, reflecting layer 403 has the total reflection medium film of high reflection function, such as silverskin, aluminium film etc. for one deck.The mode of the fluorescence ceramics 401 underrun plated films that preferably, can complete in preparation deposits total reflection medium film, such as plating, chemical plating, electron beam transpiration, plasma sputtering, evaporation etc.
Further; also can outside the reflecting layer 403 of fluorescence ceramics 401, recycle above-mentioned plated film mode and plate layer of metal protective layer; this coat of metal can be a kind of in the metals such as Ti, Ni, Cu, Al, Mo; or the mixing coating of at least two kinds of metals, or the composite film of various metals alternate plating formation.This layer of coat of metal role one is protection total reflection medium film, the 2nd, be beneficial to bonding.
Certainly, the reflecting layer in the present embodiment 403 can be also the diffuse reflector with white scattering particles described in embodiment tri-.While diffuse reflector being set on supporting member 404 surfaces, preferably, this white scattering particles is bonded together by silica gel, so that the adhesion of this diffuse reflector and supporting member 404 is stronger.Or reflecting layer 403 can also be other structures, as long as can play reflex to incident light.
The present embodiment is with the advantage that embodiment mono-to three compares, and adopts the fluorescence ceramics with compact texture, high heat conductance to replace the structure of adhering to phosphor powder layer on ceramic monolith, and its structure is simpler, and preparation technology simplifies, and produces with the cost of material is low.
Meanwhile, because fluorescence ceramics has fine and close structure, so air can not see through this fluorescence ceramics and react with reflecting layer, and then improved the stability in reflecting layer.And fluorescence ceramics has very high thermal conductivity, be more suitable for more high-power exciting light and irradiate.
Embodiment five
The Wavelength converter of the present embodiment, compares with embodiment tetra-, and its difference is in four had wavelength modular converters, and three modules wherein replace with on the ceramic monolith surface in embodiment tri-successively the structure with diffuse reflector and phosphor powder layer.What it is contemplated that is, also can only replace one of them or two wavelength modular converters, or the sum of wavelength modular converter can be other any plural quantity, and the proportioning of two kinds of wavelength modular converters quantity is separately independent assortment according to actual needs all, repeats no more herein.
Hereinafter, each parts that are not specifically described and formation and the connection of each parts, all can be with reference to previous embodiment.In the present embodiment, only to compare different features from previous embodiment, be described.
As shown in Fig. 4 A, Fig. 4 B, supporting member 504 surface is upper is fixed with wavelength modular converter 508a, 508b, 508c and 508d by modes such as bonding, welding.Driving arrangement 505 drives supporting member 504 to rotate together with each wavelength modular converter.
In the present embodiment, wavelength modular converter 508a, 508b, 508d have the structure of diffuse reflector 502 and phosphor powder layer 501 successively on ceramic monolith 503 surfaces, and concrete structure can be referring to embodiment tri-.Wherein, the monochromatic fluorescent material that wavelength modular converter 508a adopts be orange fluorescent powder, wavelength modular converter 508b adopt what be that green emitting phosphor, wavelength modular converter 508d adopt is red fluorescence powder.As in the foregoing embodiment, the fluorescent material of different colours has different heat resistances, therefore needs the first glass dust, ceramic monolith and the different burning process of Corresponding matching different materials.
Wavelength modular converter 508c is the structure that fluorescence ceramics 511 surfaces have total reflection medium film 513, specifically can be referring to embodiment tetra-.In the present embodiment, fluorescence ceramics 511 is selected the YAG fluorescence ceramics that can be inspired high-luminance yellow light.
Described four wavelength modular converters create respectively under optimum separately creating conditions, and are then respectively fixed on supporting member one side surface, are spliced into circular.
The present embodiment is with the advantage that embodiment mono-to four compares,
The Wavelength converter of the segmentation module the utility model proposes, the combination of the two kinds of wavelength modular converters in reflecting layer is set with reflecting layer and phosphor powder layer, fluorescence ceramics bottom surface by ceramic monolith end face, obtained wider expanded application, to adapt to higher design requirement.
Embodiment six
The difference of the present embodiment and embodiment mono-to five is, one of them wavelength modular converter in any embodiment in embodiment mono-to five is replaced with to transparent area or reflective areas or both to have both at the same time, NM feature in other all below embodiment, all can consult the corresponding description in embodiment mono-to five.
When will be wherein when a wavelength modular converter replaces with transparent area, as shown in Figure 5A, corresponding supporting member 604 bottom parts in arc section region at this wavelength modular converter place are cut into circular arc through hole 609, or also at this through hole 609, go out to be fixedly equipped with the high transparent glass of the corresponding circular arc of a slice, this glass can be fired and be formed by aforementioned glass dust.When this Wavelength converter turns to exciting light and is irradiated to this circular arc through hole 609 place with driving arrangement 605, exciting light is the outgoing through this through hole 609 directly, so this through hole is transparent area.
When will be wherein when a wavelength modular converter replaces with reflective areas, as shown in Figure 5 B, corresponding supporting member 614 surfaces, the arc section region at this wavelength modular converter place are applied to high reflective particle, form reflecting layer 619.Preferably, in order to make high reflective particle and supporting member 614 surface bindeds firm, high reflective particle and silica gel are mixed into slurry and are coated in supporting member 614 surface cures.Further, in order to improve reflectivity, first prepare the silver-plated aluminium flake of circular arc of one section of geomery adaptation, then on this silver-plated aluminium flake surface, apply mixed slurry the curing molding of this high reflective particle and silica gel, again this aluminium flake is fixed on the respective regions of supporting member 614, forms reflective areas., when Wavelength converter turns to exciting light and is irradiated to this reflective areas with driving arrangement 615, exciting light will be reflected.
Adopt the present embodiment, advantage compared to embodiment mono-to five is, when exciting light itself is exactly that a kind of required monochromatic light is for example during blue light, without the fluorescent material conversion by wavelength modular converter, obtain this monochromatic light, and be collected after directly making this monochromatic light reflect by transparent area outgoing or by reflective areas, can save material, obvious simplified manufacturing technique, and obtain this least possible monochromatic light of loss.
Embodiment seven
The difference of the present embodiment and embodiment mono-to six is, the structure of the supporting member in embodiment mono-to six arbitrary embodiment is changed, and other are NM feature in embodiment below, all can consult the corresponding description in embodiment mono-to six.
As shown in Figure 6, supporting member 704 is disc base plate, and fixing annular region being installed and being provided with annular groove 707 corresponding to each wavelength modular converter 708a, 708b of plate upper surface, each wavelength modular converter 708a, 708b are fixed on the inner bottom surface of this groove 707 by various fixed forms such as aforementioned bonding or welding, and inside and outside side can contact with the side, both sides of groove 707.
Adopt the present embodiment, compared to the advantage of previous embodiment, be, wavelength modular converter is built in groove, increased on the one hand the contact area of supporting member and wavelength modular converter, be conducive to the heat radiation of wavelength modular converter; On the other hand; wavelength conversion module is when rotating with driving arrangement; be subject to centrifugal action; wavelength modular converter has and is outwards got rid of de-trend; and be built in groove, the sidewall of groove can provide protection for it, prevents that it from getting rid of de-; therefore can improve the structural stability of this Wavelength converter, improve service life.
Certainly, based on foregoing description, conceivable, this groove can also have various deformation, two protruding rings for forming on the inner circle in this annular region of base plate, cylindrical circumference for example, and wavelength modular converter is positioned at this two annular regions that protruding ring surrounds; Or the several lug bosses that form in this annular region; corresponding wavelength modular converter bottom is provided with recess; this lug boss forms radial displacement constraint with coordinating of recess, or the location swap of lug boss and recess etc., these schemes are all in protection domain of the present utility model.
Embodiment eight
In embodiment mono-to seven, all adopt reflective Wavelength converter, therefore on wavelength modular converter, be provided with reflecting layer.Wavelength converter in the utility model also can be transmission-type, and therefore, without adopting reflecting layer, correspondingly, structure is as shown in Fig. 7 A, 7B.
As shown in Figure 7 B, supporting member 804 is two semicircular arc draw-in grooves, the two splices in opposite directions and fixes by being threaded on supporting member 804a, 804b outer surface, flexible clamping, the various machinery modes of removably connecting of riveted joint, or can be bonding by other, the non-dismountable mode such as welding fixes.As shown in Fig. 7 A, 7B, a plurality of wavelength modular converter 808a, 808b, 808c outer ledge insert in draw-in groove, and radial side edge is supported with adjacent wavelength modular converter, thereby mutually locates.Meanwhile, between adjacent block, also can fix by modes such as bonding, welding.In addition, at upper surface and/or the lower surface of the wavelength modular converter assembly of whole annular be provided with transparent glass, this transparent glass edge is together snapped in draw-in groove, can improve whole structural strength, prevents explosion.
The selection of wavelength modular converter and combination can be with reference to aforementioned arbitrary embodiment, and also one of them wavelength modular converter can be replaced with to transparent glass sheet, or be directly the through hole of printing opacity.
In order to improve the exciting light of transmission and the efficiency of Stimulated Light, disk one side preferably forming at wavelength modular converter is also provided with light collection assembly, and such as plane mirror, parabolic mirror, condenser lens etc., first collects rear utilization by all light.
Adopt the advantage of the present embodiment to be, can reduce the preparation section in reflecting layer, can directly adopt ready-made reflection device to complete the function of reflecting and collecting light.Although at present in technology, transmission-type light efficiency will be lower than reflective, at light efficiency less demanding or by other means phosphor powder layer or fluorescence ceramics are improved after after light efficiency significantly improves, this programme still likely becomes a kind of selection.
Embodiment nine
The difference of the present embodiment and previous embodiment is driving arrangement, and other features all can be with reference to the description in each embodiment above.
In the present embodiment, driving arrangement is used for being connected with excitation source, and drives excitation source motion, its exciting light sending is irradiated on the different wave length modular converter of Wavelength converter successively, thereby sends successively the Stimulated Light of different colours.
When wavelength modular converter is static, and while arranging according to annular, driving arrangement drives excitation source along corresponding circumference translation; Obviously, when the orthogonal square piece of wavelength modular converter and arrange successively according to rectilinear direction, driving arrangement drives excitation source to carry out rectilinear translation, and then now driving arrangement must be for producing the motor rotatablely move yet, and can be for producing the frame for movements such as straight-line carriage release lever, bent axle.Conceivable, wavelength modular converter can be arranged according to various actual needs, and driving arrangement also drives excitation source in the corresponding way.
Otherwise, when excitation source keeps static, driving arrangement is still connected with supporting member and drives wavelength modular converter to move, according to wavelength modular converter, become the different arrangement modes such as annular, linear, waveform that corresponding type of drive can be set, make driving arrangement drive wavelength modular converter to move, thereby sequentially produce different Stimulated Light.Correspondingly, driving arrangement must not be also motor, does not limit herein.
Adopt the present embodiment, with respect to the advantage of previous embodiment, be, for the structure of whole Wavelength converter provide multiple may, thereby adapt to the demand of the permutation and combination of various wavelength modular converters.
More than the embodiment of Wavelength converter of the present utility model, in description, each embodiment adopts the mode of going forward one by one to describe, each embodiment stresses is the difference with other embodiment, between each embodiment identical similar part mutually referring to.
Obviously; embodiment of the present utility model is not limited to this; so long as the Wavelength converter of the exciting light that after irradiated by the exciting light of incident, generation can not wavelength; utilize pottery to carry fluorescent material as carrier; and thereby this ceramic monolith is divided into multistage and reduces and avoid the too high and explosion of easy actual temp, such technical scheme all belongs to the claimed scope of the utility model.
Based on above-mentioned any Wavelength converter; the utility model is also protected a kind of light-source system; comprise the excitation source that produces exciting light; also comprise above-mentioned Wavelength converter; the fluorescent material of Wavelength converter is positioned in the light path of the exciting light that excitation source produces, and exciting light is converted to Stimulated Light sends.
The utility model is also protected a kind of optical projection system, for projection imaging, comprises above-mentioned light-source system.This optical projection system can adopt various shadow casting techniques, for example liquid crystal display (LCD, Liquid Crystal Display) shadow casting technique, digital light path processor (DLP, Digital Light Processor) shadow casting technique.In addition, above-mentioned light-emitting device also can be applied to illuminator, for example stage lighting illumination.
The foregoing is only embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model description and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (22)
1. a Wavelength converter, it is characterized in that, the wavelength modular converter that comprises supporting member and a plurality of mutual amalgamations, described in each, wavelength modular converter comprises ceramic monolith and is placed in the fluorescent material on described ceramic monolith, described supporting member keeps relatively fixing by described a plurality of wavelength modular converters.
2. Wavelength converter according to claim 1, is characterized in that, the fluorescent material described in each on ceramic monolith is to be stimulated to produce the monochromatic fluorescent material of solid color Stimulated Light.
3. Wavelength converter according to claim 2, is characterized in that, the monochromatic fluorescent material on different described ceramic monoliths is all identical, or different monochromatic fluorescent material is positioned on different ceramic monoliths.
4. Wavelength converter according to claim 2, is characterized in that, the fluorescent material of one of them described wavelength modular converter is laid on described ceramic monolith one side surface and forms phosphor powder layer.
5. Wavelength converter according to claim 4, is characterized in that, described phosphor powder layer also comprises the first vitreum of bonding described fluorescent material.
6. Wavelength converter according to claim 4, is characterized in that, described ceramic monolith is that thermal conductivity factor is higher than the ceramic material of 80W/mK.
7. Wavelength converter according to claim 4, it is characterized in that, between phosphor powder layer and described ceramic monolith surface, be also provided with reflecting layer, described reflecting layer is the diffuse reflector of the secondary vitreous that comprises white scattering particles and bonding described white scattering particles, or described reflecting layer is for being plated in the lip-deep total reflection medium film of described ceramic monolith.
8. Wavelength converter according to claim 7, is characterized in that, described total reflection dielectric layer is silverskin or aluminium film.
9. according to the Wavelength converter described in claim 2 or 4 any one, it is characterized in that, one of them described wavelength modular converter is dispersed in the fluorescence ceramics forming in described ceramic monolith for described fluorescent material.
10. Wavelength converter according to claim 9, is characterized in that, described fluorescence ceramics is YAG devitrified glass or sintering YAG pottery.
11. Wavelength converters according to claim 9, is characterized in that, the bottom surface of described fluorescence ceramics is provided with the diffuse reflector of the secondary vitreous composition that comprises white scattering particles and bonding described white scattering particles, or is coated with total reflection medium film.
12. Wavelength converters according to claim 11, is characterized in that, described reflecting medium film is silverskin or aluminium film.
13. Wavelength converters according to claim 11, is characterized in that, described total reflection medium film is coated with coat of metal on surface.
14. Wavelength converters according to claim 1, it is characterized in that, described supporting member is a base plate, and described a plurality of wavelength modular converters are fixedly installed to respectively on a side surface of described base plate, and described fluorescent material is positioned at the side away from described base plate of described wavelength modular converter.
15. Wavelength converters according to claim 14, is characterized in that, the material of described base plate is the composite that metal, metal alloy or metal and inorganic material form.
16. Wavelength converters according to claim 14, is characterized in that, the surface of described base plate is provided with annular groove, and described a plurality of wavelength modular converters all become circular-arc, and are combined into annular in described annular groove.
17. Wavelength converters according to claim 14, it is characterized in that, between described base plate and described wavelength modular converter, by bonding or be welded and fixed, carry out the mixed slurry that bonding bonding agent is organic adhesive, elargol or silica gel and heat filling particle.
18. Wavelength converters according to claim 17, is characterized in that, described heat filling particle is one or more in aluminium oxide, aluminium nitride, boron nitride, yittrium oxide, zinc oxide, titanium oxide.
19. Wavelength converters according to claim 17, is characterized in that, different described wavelength modular converters are different from the fixed form between described base plate.
20. Wavelength converters according to claim 1, is characterized in that, described Wavelength converter also comprises driving arrangement, and described driving arrangement drives described supporting member motion.
21. 1 kinds of light-source systems, it is characterized in that, comprise the excitation source that produces exciting light, also comprise the Wavelength converter as described in claim 1 to 20 any one, the fluorescent material of described Wavelength converter is placed in the light path of the exciting light that described excitation source produces, and exciting light is converted to Stimulated Light sends.
22. 1 kinds of optical projection systems, for projection imaging, is characterized in that, have light-source system as claimed in claim 21.
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015055088A1 (en) * | 2013-10-15 | 2015-04-23 | 深圳市光峰光电技术有限公司 | Manufacturing method for wavelength conversion device |
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Address after: 518000 20-22, 20-22 headquarters building, 63 high tech Zone, Xuefu Road, Nanshan District, Guangdong Province, Guangdong. Patentee after: APPOTRONICS Corp.,Ltd. Address before: 518000 Nanshan District, Shenzhen, Guangdong, Guangdong Province, Guangdong Road, 63 Xuefu Road, high-tech zone, 21 headquarters building, 22 floor. Patentee before: SHENZHEN GUANGFENG TECHNOLOGY Co.,Ltd. Address after: 518000 Nanshan District, Shenzhen, Guangdong, Guangdong Province, Guangdong Road, 63 Xuefu Road, high-tech zone, 21 headquarters building, 22 floor. Patentee after: SHENZHEN GUANGFENG TECHNOLOGY Co.,Ltd. Address before: 518057 Shenzhen Integrated Circuit Design and Application Industrial Park 401, No. 1089 Chaguang Road, Xili Town, Nanshan District, Shenzhen City, Guangdong Province Patentee before: APPOTRONICS Corp.,Ltd. |
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Granted publication date: 20140319 |