CN103775976B - Wavelength converter and relevant source system, optical projection system - Google Patents
Wavelength converter and relevant source system, optical projection system Download PDFInfo
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- CN103775976B CN103775976B CN201210410495.6A CN201210410495A CN103775976B CN 103775976 B CN103775976 B CN 103775976B CN 201210410495 A CN201210410495 A CN 201210410495A CN 103775976 B CN103775976 B CN 103775976B
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Abstract
The embodiment of the invention discloses a kind of Wavelength converter and relevant source system, optical projection system, comprising: the first wave length conversion sub-layer of stacked setting and second wave length conversion sub-layer.First wave length conversion sub-layer comprises the incidence surface of second wave length conversion sub-layer dorsad, first wave length conversion sub-layer is for the exciting light that receives from incidence surface incidence and this exciting light is partially converted to Stimulated Light, and part exciting light is transmitted through second wave length conversion sub-layer.The density of the material for transformation of wave length of second wave length conversion sub-layer is greater than the density of the material for transformation of wave length of first wave length conversion sub-layer.Embodiments provide and a kind ofly can improve Wavelength converter to exciting light conversion efficiency and relevant source system, optical projection system.
Description
Technical field
The present invention relates to illumination and Display Technique field, particularly relate to a kind of Wavelength converter and relevant source system, optical projection system.
Background technology
At present, material for transformation of wave length has apply very widely in illumination and display field.Material for transformation of wave length refers to that the exciting light that can absorb a kind of wavelength produces the material of the light of different wave length.Material for transformation of wave length can be phosphorescent material, fluorescent material, quantum dot and the mixture comprising at least one above-mentioned material.
Fig. 1 is the structural representation of a kind of light-emitting device of the prior art, as shown in Figure 1, light-emitting device comprises excitation source 102 and wavelength conversion layer 101, and wavelength conversion layer 101 can absorb the exciting light 104 from excitation source 102 outgoing, and the Stimulated Light 103 of outgoing different wave length.The conversion efficiency of material for transformation of wave length can be defined as the ratio of the luminous flux of Stimulated Light 103 and the luminous power of exciting light 104.In general, the surface that exciting light can be focused onto wavelength conversion layer forms a hot spot.The size of hot spot and the luminous flux of hot spot emergent light will determine the brightness of whole light-emitting device emergent light, and in general, the optical power density of the exciting light at hot spot place is higher, and hot spot will the more Stimulated Light of outgoing.Suppose that the dispersion angle of Stimulated Light 103 remains unchanged, in most of the cases, the brightness of Stimulated Light 103 can increase with the increase of the optical power density of exciting light 104.But the conversion efficiency of a lot of material for transformation of wave length can reduce along with the increase of the optical power density of exciting light, and this phenomenon is called saturation effect.Fig. 2 a is the relation curve between the intensity of Stimulated Light and the optical power density of exciting light, and as can be seen from Fig. 2 a, along with the increase of the optical power density of exciting light, the intensity of Stimulated Light increases gradually, but the trend increased is more and more slower.Fig. 2 b is the relation curve between the conversion efficiency of material for transformation of wave length and the optical power density of exciting light.Clearly, the optical power density of exciting light is higher, and the conversion efficiency of material for transformation of wave length is lower.
Summary of the invention
The technical problem that the present invention mainly solves is to provide and a kind ofly can improves Wavelength converter to exciting light conversion efficiency and relevant source system, optical projection system.
Embodiments provide a kind of light-emitting device, it is characterized in that, comprising:
The first wave length conversion sub-layer of stacked setting and second wave length conversion sub-layer;
First wave length conversion sub-layer comprises the incidence surface of second wave length conversion sub-layer dorsad, first wave length conversion sub-layer is for the exciting light that receives from incidence surface incidence and this exciting light is partially converted to Stimulated Light, and part exciting light is transmitted through second wave length conversion sub-layer;
The density of the material for transformation of wave length of second wave length conversion sub-layer is greater than the density of the material for transformation of wave length of first wave length conversion sub-layer.
Present invention also offers a kind of light-source system, this light-source system comprises above-mentioned Wavelength converter.
Present invention also offers a kind of optical projection system, this optical projection system comprises above-mentioned Wavelength converter.
Compared with prior art, the embodiment of the present invention has following beneficial effect:
In the present embodiment, the material for transformation of wave length density of the first wave length conversion sub-layer of wavelength conversion layer is less than second wave length conversion sub-layer, because the density of first wave length conversion sub-layer diminishes, decreasing of the exciting light that first wave length conversion sub-layer absorbs, more exciting light enters second wave length conversion sub-layer.Therefore the decreasing of Stimulated Light that produce of the first wave length conversion sub-layer of low conversion efficiency, the quantity of the Stimulated Light that second wave length conversion sub-layer produces adds, and the Stimulated Light that the quantity of the Stimulated Light that second wave length conversion sub-layer increases will reduce more than first wave length conversion sub-layer, thus the whole efficiency of wavelength conversion layer is improve.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of light-emitting device of the prior art;
Fig. 2 a is the relation curve between the intensity of Stimulated Light and the optical power density of exciting light;
Fig. 2 b is the relation curve between the conversion efficiency of material for transformation of wave length and the optical power density of exciting light;
Fig. 3 is the structural representation of an embodiment of embodiment of the present invention medium wavelength conversion equipment;
Fig. 4 a is the structural representation of the wavelength conversion layer of a kind of material for transformation of wave length even density distribution;
Fig. 4 b is the relation curve between the incident degree of depth of exciting light in the wavelength conversion layer of uniform density and the optical power density of exciting light;
Fig. 5 is the Density Distribution schematic diagram of the material for transformation of wave length of the wavelength conversion layer of another embodiment of medium wavelength conversion equipment of the present invention;
Fig. 6 is the change curve of relative optical power density with the increase of the relative depth of wavelength conversion layer of exciting light;
Fig. 7 be in prior art with embodiment illustrated in fig. 3 in the structural representation of wavelength conversion layer;
Fig. 8 a-8d is the density profile of the wavelength conversion layer in another embodiment of Wavelength converter of the present invention;
Fig. 9 is the design curve of the Density Distribution of the material for transformation of wave length of wavelength conversion layer and the contrast schematic diagram of actual curve;
Figure 10 is the structural representation of the Wavelength converter in another embodiment of Wavelength converter of the present invention;
Figure 11 is the material for transformation of wave length density profile of the wavelength conversion layer in another embodiment of Wavelength converter of the present invention.
Detailed description of the invention
Below in conjunction with drawings and embodiments, the embodiment of the present invention is described in detail.
Embodiment one
Fig. 3 is the structural representation of an embodiment of embodiment of the present invention medium wavelength conversion equipment, as shown in Figure 3, Wavelength converter 420 only comprises wavelength conversion layer, and this wavelength conversion layer comprises first wave length conversion sub-layer 421 and the second wave length conversion sub-layer 422 of stacked setting.
First wave length conversion sub-layer 421 comprises the incidence surface 421a of second wave length conversion sub-layer 422 dorsad, first wave length conversion sub-layer 421 receives the exciting light from incidence surface 421a incidence and this exciting light is partially converted to Stimulated Light, and part exciting light is transmitted through second wave length conversion sub-layer 422.The density of the material for transformation of wave length of second wave length conversion sub-layer 422 is greater than the density of the material for transformation of wave length of first wave length conversion sub-layer 421.Material for transformation of wave length is modal is fluorescent material, also can be the material that quantum dot or fluorescent dye etc. have wavelength convert function.
Fig. 4 a is the structural representation of the wavelength conversion layer of a kind of material for transformation of wave length even density distribution, and as shown in fig. 4 a, wavelength conversion layer 210 receives exciting light 220, and the material for transformation of wave length particle 211 of wavelength conversion layer 210 is evenly distributed in wavelength conversion layer.When exciting light incides the inside of wavelength conversion layer, due to scattering process and the absorption of material for transformation of wave length particle 211, the optical power density of exciting light significantly reduces.Detect through experiment, Fig. 4 b is the relation curve between the incident degree of depth of exciting light in the wavelength conversion layer of uniform density and the optical power density of exciting light, as shown in Figure 4 b, at 20% depth of wavelength conversion layer, the optical power density of exciting light only has 60% of the excitation light power density on wavelength conversion layer surface, therefore very high close to the exciting light energy density at the plane of incidence place of wavelength conversion layer and material for transformation of wave length has very high saturation degree, be far from over the exciting light of hypersorption incidence, and the material for transformation of wave length particle of deep layer receives the exciting light of lower power density, the material for transformation of wave length particle of deep layer can not occur saturated.Therefore, for the wavelength conversion layer of material for transformation of wave length uniform density distribution, the material for transformation of wave length of its inside receives the exciting light of lower-wattage density, and the saturated of conversion efficiency that be far from reaching, cause the overall transformation efficiency of wavelength conversion layer lower.
In the present embodiment, the density of the material for transformation of wave length of the first wave length conversion sub-layer 421 of wavelength conversion layer 420 is less than the density of the material for transformation of wave length of second wave length conversion sub-layer 422, because the density of the material for transformation of wave length of first wave length conversion sub-layer 421 diminishes, decreasing of the exciting light that first wave length conversion sub-layer 421 absorbs, more exciting light enters second wave length conversion sub-layer 422.Therefore the decreasing of Stimulated Light that produce of the first wave length conversion sub-layer 421 of low conversion efficiency, the quantity of the Stimulated Light that second wave length conversion sub-layer 422 produces adds, conversion efficiency due to second wave length conversion sub-layer 422 is higher than the conversion efficiency of first wave length conversion sub-layer 421, the quantity of the Stimulated Light that second wave length conversion sub-layer 422 increases will more than the quantity of the Stimulated Light of first wave length conversion sub-layer 421 minimizing, thus make the whole efficiency of wavelength conversion layer improve.
In fact, in order to improve conversion efficiency better, wavelength conversion layer can comprise multiple wavelength convert sublayer.Preferably, wavelength conversion layer can also comprise the 3rd wavelength convert sublayer, first wave length conversion sub-layer, second wave length conversion sub-layer and the 3rd wavelength convert sublayer are cascading, and the density of the material for transformation of wave length of the 3rd wavelength convert sublayer is greater than the density of the material for transformation of wave length of second wave length conversion sub-layer.Relative to the situation of two wavelength convert sublayers, when wavelength convert layer thickness is constant and each molecular layers thick is identical, the first wave length conversion sub-layer comprising the wavelength conversion layer of three wavelength convert sublayers can absorb less exciting light, and be transmitted through second wave length conversion sub-layer and the 3rd wavelength convert sublayer, successively absorb, efficiency can be higher.
It is easily understood that wavelength conversion layer can also arrange the wavelength convert sublayer of more than three.Such as, the wavelength conversion layer of another embodiment of medium wavelength conversion equipment of the present invention can be laminated by multiple wavelength convert sublayer, the Density Distribution schematic diagram of the material for transformation of wave length of its wavelength conversion layer as shown in Figure 5, each ladder represents the Density Distribution of a wavelength convert sublayer, the density of the material for transformation of wave length of multiple wavelength convert sublayer becomes stepped gradient to distribute, and the density of material for transformation of wave length increases gradually with degree of depth increase.The wavelength conversion layer of this structure is also shaping than being easier to.Fig. 6 is the change curve of relative optical power density with the increase of the relative depth of wavelength conversion layer of exciting light, wherein bold portion be wavelength conversion layer density as shown in Figure 5 gradient distribution time change curve, the dotted portion change curve that to be the density of wavelength conversion layer be when being uniformly distributed, the variation tendency of two curves has obvious difference, such as at 50% depth, the optical power density of the wavelength conversion layer of uniform density distribution has dropped to 30% of surface light power density, and the optical power density of the wavelength conversion layer of gradient distribution has only dropped to surface light power density 56%, can find out that the material for transformation of wave length of the deep layer of the wavelength conversion layer that gradient distributes can receive more exciting light relative to equally distributed wavelength conversion layer.
In order to further illustrate the operation principle of the Wavelength converter of the present embodiment, here the Wavelength converter in prior art and the present embodiment is contrasted.Fig. 7 be in prior art with embodiment illustrated in fig. 3 in the structural representation of wavelength conversion layer, as shown in Figure 7, Wavelength converter A is wavelength conversion layer of the prior art, comprise first wave length conversion sub-layer a and second wave length conversion sub-layer b, wavelength conversion layer B is the wavelength conversion layer in the present embodiment, comprises first wave length conversion sub-layer c and second wave length conversion sub-layer d.Here we suppose first wave length conversion sub-layer a, second wave length conversion sub-layer b, second wave length conversion sub-layer d medium wavelength transition material density identical, the density of the material for transformation of wave length of first wave length conversion sub-layer c is the half of first wave length conversion sub-layer a, and the thickness of all wavelengths conversion sub-layer is identical.When there being the exciting light photon of 200 units incident first wave length conversion sub-layer a, suppose have 100 unit photons to be absorbed, the photon remaining 100 units can evenly incide second wave length conversion sub-layer b owing to the reason such as to be scattered.If be 1 in the relative optical power density of the plane of incidence of first wave length conversion sub-layer a, according to Fig. 6, in the surface of relative depth 0.5 place and second wave length conversion sub-layer b, the relative optical power density of the exciting light of uniform density wavelength conversion layer is 0.30.Can obtain according to Fig. 2 b again, during optical power density 1, the Relative transfer efficiency of first wave length conversion sub-layer a is 0.38, during optical power density 0.30, the Relative transfer efficiency of second wave length conversion sub-layer b is 0.94, and the Stimulated Light that therefore can obtain the outgoing of wavelength conversion layer A is: 0.38 × 100+0.94 × 100=132 unit.In like manner, for wavelength conversion layer B, first wave length conversion sub-layer c is incident to when there being the exciting light photon of 200 units, material for transformation of wave length density due to first wave length conversion sub-layer c is the half of first wave length conversion sub-layer a, have 50 unit photons to be absorbed, the photon of remaining 150 units the reason such as to be scattered and evenly to incide second wave length conversion sub-layer d.The relative optical power density of the plane of incidence of first wave length conversion sub-layer c is similarly 1, and according to Fig. 6, in the surface of relative depth 0.5 place and second wave length conversion sub-layer d, the relative optical power density of the exciting light of the wavelength conversion layer of gradient distribution is 0.56.Can obtain according to Fig. 2 b again, relative optical power density is the Relative transfer efficiency of the first wave length conversion sub-layer c of 1 is 0.38, relative optical power density is the Relative transfer efficiency of the second wave length conversion sub-layer d of 0.56 is 0.88, the Stimulated Light that therefore can obtain the outgoing of wavelength conversion layer B is: 0.38 × 50+0.88 × 150=141 unit, the wavelength conversion layer of gradient distribution is relative to equally distributed wavelength conversion layer it can be seen, and it increases to the whole efficiency of exciting light.
In addition, because lower in the conversion efficiency of first wave length conversion sub-layer, a large amount of exciting light energy is converted into heat, cause the temperature of first wave length conversion sub-layer higher, the conversion efficiency of material for transformation of wave length can be reduced.More exciting light is changed in the place that the degree of depth is darker by the wavelength conversion layer of gradient distribution, therefore the caloric value of first wave length conversion sub-layer decreases, this, by improving the conversion efficiency of the material for transformation of wave length of first wave length conversion sub-layer, further increases the overall transformation efficiency of wavelength conversion layer.
From experiment, the exciting light energy that first wave length conversion sub-layer and second wave length conversion sub-layer absorb relatively time, the whole efficiency of wavelength conversion layer is higher.Preferably, the density of the material for transformation of wave length of first wave length conversion sub-layer is less than 70% of the density of the material for transformation of wave length of second wave length conversion sub-layer, through experimental verification, now overall transformation efficiency can promote obvious.
For the wavelength conversion layer of multiple wavelength convert sublayers composition of gradient distribution, the trend of its Density Distribution can have various ways.Fig. 8 a-8d is the density profile of the wavelength conversion layer in another embodiment of Wavelength converter of the present invention, and as shown in Figure 8 a, the density of wavelength conversion layer linearly can increase along with the increase of wavelength convert layer depth.As shown in Fig. 8 b-8d, the density of wavelength conversion layer can be also non-linear increase along with the increase of wavelength convert layer depth.Wherein, the density profile of the wavelength conversion layer shown in Fig. 8 b is the convex curve increased progressively, the density profile of the wavelength conversion layer shown in Fig. 8 c is the sag vertical curve increased progressively, the density profile of the wavelength conversion layer shown in Fig. 8 d is first half is convex curve, latter half be sag vertical curve increase progressively curve, and with Fig. 8 a-8d unlike, the relative density of the material for transformation of wave length on the surface of the wavelength conversion layer shown in Fig. 8 d is non-vanishing.Certainly, in the present invention, the relative density of the material for transformation of wave length on the surface of wavelength conversion layer to arrange as required.The citing of density profile just to the Density Distribution of the material for transformation of wave length of wavelength conversion layer of the present invention of the material for transformation of wave length to wavelength conversion layer cited here, is not construed as limiting the present invention.In fact, the density profile of the material for transformation of wave length of wavelength conversion layer of the present invention can have more form, this density profile can be determined according to the thickness of material for transformation of wave length layer and application scenario etc., with the conversion efficiency making Wavelength converter reach optimum.
In the preparation process of wavelength conversion layer, due to the existence of the factors such as fabrication error, the density profile of the material for transformation of wave length of wavelength conversion layer can not be completely according to the curvilinear motion of predetermined design, and often comprises multiple fluctuating.Such as, Fig. 9 is the design curve of the Density Distribution of the material for transformation of wave length of wavelength conversion layer and the contrast schematic diagram of actual curve, as shown in Figure 9, design curve is linear increment curve, and actual curve is the curve with more fluctuating be distributed in around design curve, but design curve is consistent with the cardinal principle variable density trend of actual curve.On the other hand, in the manufacturing process of the wavelength conversion layer of reality, wavelength conversion layer is made up of multiple wavelength convert sublayer often, and therefore the Density Distribution of wavelength conversion layer may be also discontinuous, forms the distribution of stair-stepping gradient.When the thinner thickness of each wavelength convert sublayer of wavelength conversion layer time, the Density Distribution approximate continuous of material for transformation of wave length of wavelength conversion layer can be thought.
In the present embodiment, wavelength conversion layer also comprises bonding agent except comprising material for transformation of wave length, such as silica gel, PMMA, clear glasses etc., this bonding agent can bonding material for transformation of wave length, and material for transformation of wave length can be evenly distributed in bonding agent and form an entirety.Bonding agent can play the effect of fixed wave length transition material, and can completely cut off air to protect material for transformation of wave length.
In the present invention, the density profile of the material for transformation of wave length of wavelength conversion layer is monotonic increase always on the depth direction of wavelength conversion layer not necessarily, also can be other form.Figure 10 is the structural representation in another embodiment of Wavelength converter of the present invention, and as shown in Figure 10, Wavelength converter comprises wavelength conversion layer 520, and the Wavelength converter in the present embodiment and the difference of the Wavelength converter shown in Fig. 3 are:
(1) wavelength conversion layer 520 in the present embodiment is except comprising first wave length conversion sub-layer 521 and second wave length conversion sub-layer 522, also comprise the 3rd wavelength convert sublayer 523 and the 4th wavelength convert sublayer 524, the density of the material for transformation of wave length of the 3rd wavelength convert sublayer 523 is less than the density of the material for transformation of wave length of second wave length conversion sub-layer 522, the density of the material for transformation of wave length of the 4th wavelength convert sublayer 524 is greater than the density of the material for transformation of wave length of the 3rd wavelength convert sublayer 523, first wave length conversion sub-layer 521, second wave length conversion sub-layer 522, 3rd wavelength convert sublayer 523 and the 4th wavelength convert sublayer 524 are cascading.In fact, the wavelength conversion layer in the present embodiment be equivalent to two embodiment illustrated in fig. 3 in the superposition of wavelength conversion layer, the wavelength conversion layer therefore in the present embodiment can improve overall conversion efficiency equally.In addition, when the integral thickness of wavelength conversion layer is identical, the thickness of the wavelength convert sublayer in the present embodiment is thinner, therefore the second wave length conversion sub-layer that more exciting light can enter conversion efficiency higher transmitted through first wave length conversion sub-layer is changed, thus further increases conversion efficiency.Preferably, the equal density of the material for transformation of wave length of first wave length conversion sub-layer and the 3rd wavelength convert sublayer, the equal density of the material for transformation of wave length of second wave length conversion sub-layer and the 4th wavelength convert sublayer.Such advantage is: the wavelength convert sublayer only needing preparation two kinds of density, reduces operation, saves cost.
It is contemplated that in other embodiments of the present invention, wavelength conversion layer can also have the alternatively distributed different wave length conversion sub-layer of more density size.Such as, the wavelength conversion layer of Wavelength converter can by multiple different low-density and highdensity wavelength convert sublayer be overlapping forms, the material for transformation of wave length density profile of its wavelength conversion layer as shown in figure 11, wavelength conversion layer is along with the increase of the degree of depth, the density height cross-distribution of wavelength convert sublayer, here different low-density wavelength convert sublayer is equal separately with the density of high density wavelength convert sublayer, at other embodiment, the density of different low wavelength convert sublayers can not be identical, the density of different high wavelength convert sublayers also can not be identical.
(2) in an embodiment, Wavelength converter also comprises substrate 510, the intimate surface contact of substrate 510 and wavelength conversion layer 520 incidence surface 521a dorsad.Relative to the wavelength conversion layer that the even density of material for transformation of wave length distributes, medium wavelength conversion equipment of the present invention can produce more heat at the shady face of wavelength conversion layer, and calorie source, near substrate, is conducive to the conduction of heat.Certainly, in other embodiments of the present invention, when wavelength conversion layer intensity is enough, substrate is also omissible.In addition, the substrate in the present embodiment can be transparent, and as transparent glass substrate, now Wavelength converter is transmission-type; Substrate also can be have reflection function or its surface arranges reflecting layer, aluminium flake as anti-in height, and now Wavelength converter is reflective.
(3) in the present embodiment, Wavelength converter also comprises a drive unit 530, this drive unit 530 can drive substrate 510 and wavelength conversion layer 520 to rotate, this wavelength conversion layer is acted on along predefined paths, the problem that this wavelength conversion layer temperature caused in the same position of wavelength conversion layer 520 to avoid exciting light long duration of action raises with the hot spot making exciting light be formed on wavelength conversion layer 520.Particularly, in the present embodiment, drive unit 530 rotates for driving wavelength conversion layer 520, and the hot spot formed on this wavelength conversion layer to make exciting light acts on this wavelength conversion layer along predetermined circular path.Preferably, substrate 510 is in the form of annular discs, and wavelength conversion layer 520 is in the ring-type concentric with this disk, and drive unit 530 is cylindrical motor, and drive unit 530 and wavelength conversion layer 520 are coaxially fixed.In other embodiment of the present invention, drive unit 530 also can drive wavelength conversion layer 520 otherwise to move, such as horizontal reciprocating movement etc.When wavelength conversion layer 520 material for transformation of wave length can withstand higher temperatures, Wavelength converter also can not arrange drive unit.
In this description, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
The embodiment of the present invention also provides a kind of light-emitting device, and this light-emitting device comprises the LASER Light Source for outgoing exciting light, and this light-emitting device also comprises Wavelength converter, and this Wavelength converter can have the structure and fuction in the various embodiments described above.
The embodiment of the present invention also provides a kind of optical projection system, comprises light-emitting device, and this light-emitting device can have the structure and fuction in the various embodiments described above.This optical projection system can adopt various shadow casting technique, such as liquid crystal display (LCD, LiquidCrystalDisplay) shadow casting technique, digital optical processor (DLP, DigitalLightProcessor) shadow casting technique.In addition, above-mentioned light-emitting device also can be applied to illuminator, such as stage lighting illumination.
The foregoing is only embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; 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 invention.
Claims (10)
1. a Wavelength converter, comprises wavelength conversion layer, it is characterized in that, described wavelength conversion layer comprises:
The first wave length conversion sub-layer of stacked setting and second wave length conversion sub-layer;
Described first wave length conversion sub-layer comprises the incidence surface of described second wave length conversion sub-layer dorsad, described first wave length conversion sub-layer is for the exciting light that receives from described incidence surface incidence and this exciting light is partially converted to Stimulated Light, and part exciting light is transmitted through second wave length conversion sub-layer;
The density of the material for transformation of wave length of described second wave length conversion sub-layer is greater than the density of the material for transformation of wave length of described first wave length conversion sub-layer.
2. Wavelength converter according to claim 1, is characterized in that: the density of the material for transformation of wave length of described first wave length conversion sub-layer is less than 70% of the density of the material for transformation of wave length of described second wave length conversion sub-layer.
3. Wavelength converter according to claim 1, it is characterized in that: described Wavelength converter also comprises the 3rd wavelength convert sublayer, described first wave length conversion sub-layer, second wave length conversion sub-layer and the 3rd wavelength convert sublayer are cascading, and the density of the material for transformation of wave length of described 3rd wavelength convert sublayer is greater than the density of the material for transformation of wave length of described second wave length conversion sub-layer.
4. Wavelength converter according to claim 3, is characterized in that: the density of the material for transformation of wave length of described first wave length conversion sub-layer, second wave length conversion sub-layer and the 3rd wavelength convert sublayer linearly increases.
5. Wavelength converter according to claim 1, it is characterized in that: described wavelength conversion layer also comprises the 3rd wavelength convert sublayer and the 4th wavelength convert sublayer, the density of the material for transformation of wave length of the 3rd wavelength convert sublayer is less than the density of the material for transformation of wave length of described second wave length conversion sub-layer, the density of the material for transformation of wave length of the 4th wavelength convert sublayer is greater than the density of the material for transformation of wave length of described 3rd wavelength convert sublayer, described first wave length conversion sub-layer, second wave length conversion sub-layer, 3rd wavelength convert sublayer and the 4th wavelength convert sublayer are cascading.
6. Wavelength converter according to claim 5, it is characterized in that: the equal density of the material for transformation of wave length of described first wave length conversion sub-layer and the 3rd wavelength convert sublayer, the equal density of the material for transformation of wave length of described second wave length conversion sub-layer and the 4th wavelength convert sublayer.
7. Wavelength converter according to claim 1, is characterized in that: described wavelength conversion layer also comprises bonding agent, and described bonding agent is used for bonding described material for transformation of wave length.
8. Wavelength converter according to claim 1, is characterized in that: described Wavelength converter also comprises substrate, the intimate surface contact of the described dorsad incidence surface of this substrate and described wavelength conversion layer.
9. a light-source system, is characterized in that, comprises the Wavelength converter according to any one of claim 1 to 8.
10. an optical projection system, is characterized in that, comprises the Wavelength converter according to any one of claim 1 to 8.
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| CN106969305B (en) * | 2016-01-14 | 2020-08-25 | 深圳光峰科技股份有限公司 | Adjustable light source device and lighting device |
| CN107728412B (en) * | 2016-08-11 | 2020-04-24 | 深圳光峰科技股份有限公司 | Light source device and related projection system |
| CN109424943B (en) * | 2017-07-05 | 2020-12-15 | 深圳光峰科技股份有限公司 | Wavelength conversion device and laser fluorescence conversion type light source |
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| CN103775976A (en) | 2014-05-07 |
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