CN112799273B - Wavelength conversion element, preparation method thereof and laser fluorescent light source - Google Patents
Wavelength conversion element, preparation method thereof and laser fluorescent light source Download PDFInfo
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- CN112799273B CN112799273B CN201911109163.2A CN201911109163A CN112799273B CN 112799273 B CN112799273 B CN 112799273B CN 201911109163 A CN201911109163 A CN 201911109163A CN 112799273 B CN112799273 B CN 112799273B
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 32
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
- G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/16—Cooling; Preventing overheating
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
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Abstract
The application provides a wavelength conversion element and a preparation method thereof, and a laser fluorescence light source comprising the wavelength conversion element, wherein the wavelength conversion element comprises a fluorescent layer for converting excitation light with a first wavelength distribution into laser light with a second wavelength distribution; and the filter layer is attached to the fluorescent layer and is used for filtering the laser to obtain narrow-band emergent light with third wavelength distribution, and the filter layer contains colored glass powder. The optical filter layer in the wavelength conversion element provided by the application comprises the absorption type colored glass powder, the fluorescent layer and the optical filter layer are mutually attached, and the optical filter layer containing the colored glass powder has better heat conduction and heat dissipation performance compared with air, so that the light extraction efficiency of emergent light is improved, and the cost is saved by using the colored glass as an effective optical filter substance of the optical filter layer.
Description
Technical Field
The application relates to the technical field of light sources, in particular to a wavelength conversion element, a preparation method thereof and a laser fluorescent light source.
Background
This section is intended to provide a background or context to the particular embodiments of the application that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
The laser fluorescent light source is a laser and fluorescent mixed light source formed by exciting fluorescent materials by laser, and has the advantages of long service life, high efficiency, no pollution and the like compared with a projection display light source using a traditional ultra-high-definition and other high-brightness bulb light source; compared with an LED light source, the laser fluorescent light source has the advantages of high brightness and the like; compared with a pure laser light source, the laser fluorescent light source has no speckle problem and has lower cost. The advantages of laser fluorescent light sources have led to their widespread use in projection display systems. The laser fluorescent light sources commonly used at present can be classified into reflective laser fluorescent light sources and transmissive laser fluorescent light sources. Fig. 1 is a schematic diagram of a perspective laser fluorescent light source commonly used at present, laser light with a first wavelength distribution emitted by a laser 1 is incident to a fluorescent sheet 3 through a dichroic sheet 2, and is converted into light with a second wavelength distribution by the fluorescent sheet 3, wherein the fluorescent light with the second wavelength distribution generally has a wider wavelength distribution range, and needs to be filtered by a filter 4 to obtain narrow-band emergent light with a third wavelength distribution. Interference filters are commonly used in the prior art, so that the cost is high, and the filtering performance can be influenced by the angle of incident light; meanwhile, the use of an interference filter generally requires an air gap between the filter 4 and the phosphor plate 3. In the laser fluorescent light source, a large amount of heat is generated by the fluorescent sheet 3 in the wavelength conversion process, and the air gap between the optical filter 4 and the fluorescent sheet 3 makes the heat unable to be rapidly conducted out, so that the heat is concentrated near the fluorescent sheet 3, and the light emitting performance and the service life of the light source are seriously affected.
Disclosure of Invention
In view of the above, it is necessary to provide a wavelength conversion element having a good heat radiation effect.
A first aspect of the present application provides a wavelength converting element comprising:
a fluorescent layer for converting the excitation light of the first wavelength distribution into a lasing light of the second wavelength distribution; and
And the filter layer is attached to the fluorescent layer and used for filtering the laser to obtain narrow-band emergent light with third wavelength distribution, and the filter layer contains colored glass powder.
In a second aspect, the present application provides a laser fluorescent light source, comprising:
the excitation light source is used for emitting laser light with first wavelength distribution;
the wavelength conversion element is used for converting the excitation light into laser light with a second wavelength distribution, and filtering the laser light to obtain emergent light with a third narrow-band wavelength distribution; and
A dichroic plate positioned between the excitation light source and the wavelength converting element.
A third aspect of the present application provides a laser fluorescent light source comprising:
the excitation light source is used for emitting laser light with first wavelength distribution; and
The wavelength conversion element as described above, wherein the fluorescent layer is a fluorescent ceramic layer, and the wavelength conversion element further comprises a dichroic film formed directly on a surface of the fluorescent layer facing away from the filter layer, and on a side of the wavelength conversion element facing the excitation light source.
According to a fourth aspect of the present application, there is provided a method for manufacturing a wavelength conversion element as described above, comprising the steps of:
uniformly mixing the fluorescent powder with the original material of the first matrix to obtain fluorescent layer slurry;
uniformly mixing the colored glass powder with the original material of the second matrix to obtain filter layer slurry; and
and curing the fluorescent layer slurry and the filter layer slurry to obtain the wavelength conversion element.
The optical filter layer in the wavelength conversion element provided by the application comprises the absorption type colored glass powder, and meanwhile, the fluorescent layer and the optical filter layer are mutually attached, and the optical filter layer containing the colored glass powder has better heat conduction and heat dissipation performance relative to air, so that the phenomenon of heat accumulation caused by an air gap between the fluorescent layer and the optical filter layer in the traditional laser fluorescent light source is avoided, and in addition, the optical filter layer and the fluorescent layer are mutually attached, so that the light extraction efficiency of emergent light is improved; meanwhile, the use of colored glass as an effective filter substance of the filter layer is advantageous in saving costs as compared with the conventional wavelength conversion element.
Drawings
In order to more clearly illustrate the embodiments/modes of the present application, the drawings that are required for the description of the embodiments/modes will be briefly described, and it will be apparent that the drawings in the following description are some embodiments/modes of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person having ordinary skill in the art.
Fig. 1 is a schematic diagram of a conventional perspective laser fluorescent light source.
Fig. 2 is a schematic structural diagram of a wavelength conversion element according to a first embodiment of the present application.
Fig. 3 is a schematic structural diagram of a laser fluorescent light source according to a first embodiment of the present application.
Fig. 4 is a schematic structural diagram of a wavelength conversion element according to a third embodiment of the present application.
Fig. 5 is a schematic structural diagram of a laser fluorescent light source according to a third embodiment of the present application.
Description of the main reference signs
Laser 1
Dichroic plates 2, 12
Fluorescent sheet 3
Optical filter 4
Wavelength conversion element 11, 21
Substrate 110
Phosphor layers 111, 211
Filter layer 112, 212
Laser fluorescent light sources 40, 50
Excitation light sources 10, 20
Dichroic film 210
The application will be further described in the following detailed description in conjunction with the above-described figures.
Detailed Description
In order that the above-recited objects, features and advantages of the present application will be more clearly understood, a more particular description of the application will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, and the described embodiments are merely some, rather than all, embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
Example 1
As shown in fig. 2, a schematic structural diagram of the wavelength conversion element 11 according to the present embodiment, the wavelength conversion element 11 includes a fluorescent layer 111 and a filter layer 112, wherein the fluorescent layer 111 includes a first matrix and a fluorescent powder, wherein the first matrix may include at least one of silica gel, glass, and ceramic; the filter layer 112 includes a second matrix and a colored glass frit, and the second matrix may include at least one of silica gel and glass. In view of reliability issues, the coefficients of thermal expansion of the first and second substrates should be matched to avoid displacement or faults of the wavelength converting element 11 due to heat accumulation. The filter layer 112 and the phosphor layer 111 are closely adhered to each other without an air gap.
In this embodiment, the fluorescent layer 111 is a silica gel encapsulated fluorescent powder structure, and the filter layer 112 is a silica gel encapsulated colored glass powder structure. The silica gel in the fluorescent layer 111 and the silica gel in the filter layer 112 may be the same kind of silica gel or different kinds of silica gel, and when different kinds of silica gel are used, the thermal expansion coefficients of the two silica gels are close. The refractive index of the silica gel selected by the preferred filter layer 112 is lower than that of the silica gel used by the fluorescent layer 111, so that the total emission of light entering the filter layer 112 from the fluorescent layer 111 can be reduced, more light is transmitted into the filter layer, and the light extraction efficiency of the light emitted by the filter layer 112 can be improved.
The fluorescent layer 111 is configured to convert the excitation light with the first wavelength distribution into the excited light (fluorescence) with the second wavelength distribution, and the fluorescent powder may be a fluorescent powder known in the art, such as blue powder, green powder, yellow powder, red powder, or the like, and the specific fluorescent powder material may be selected according to actual needs.
Since the fluorescence of the second wavelength distribution generally has a wider wavelength distribution range, the filter layer 112 is used to filter the fluorescence light, resulting in the emitted light of the third wavelength distribution in a narrow band. The colored glass powder in the filter layer 112 is used as an absorption type filter material, and includes a metal compound (generally, a metal oxide) capable of selectively absorbing the light incident on the filter layer 112, and the type of the metal compound may be selected according to the wavelength band to be filtered in practical situations.
The fluorescent layer 111 of the embodiment is a silica gel encapsulated fluorescent powder structure, which can be formed by sintering and solidifying slurry mainly composed of fluorescent powder and silica gel precursor; the filter layer 112 is a silica gel encapsulated colored glass frit structure, which can be formed by curing a slurry consisting essentially of colored glass frit and a silica gel precursor.
The method of manufacturing the wavelength conversion element 11 according to the present embodiment is exemplified as follows:
(1) And (3) preparing a fluorescent layer and a filter layer slurry: and selecting proper commercial fluorescent powder, and uniformly mixing a proper amount of commercial fluorescent powder and a silica gel precursor to obtain fluorescent layer slurry. And selecting proper colored glass powder, and uniformly mixing a proper amount of colored glass powder with a silica gel precursor to obtain the filter layer slurry. The silica gel precursor used by the fluorescent layer slurry and the silica gel precursor used by the filter layer can be the same or different.
(2) And (5) molding and curing: the fluorescent layer 111 and the filter layer 112 in this embodiment may be integrally formed and cured or separately formed and cured.
The curing temperature of the fluorescent layer slurry and the filter layer slurry is required to be similar in the integrated molding curing, so that the fluorescent layer and the filter layer can be cured at the same time and cannot be damaged at a proper temperature. The concrete flow of the integrated forming and curing is as follows: after a phosphor paste of a proper thickness is coated on the substrate 110 by a doctor blade method, a filter paste of a proper thickness is coated on the phosphor layer by the same method, and finally, the phosphor paste and the filter paste bilayer structure on the substrate 110 are cured at a proper temperature, thereby obtaining a wavelength conversion element in which the phosphor layer and the filter layer are in direct contact.
In the process of single molding and curing, a doctor blade method is adopted to coat fluorescent layer slurry with proper thickness on a substrate 110, the fluorescent layer 111 is obtained by curing at proper temperature, a filter layer slurry with proper thickness is coated on the fluorescent layer 111 by adopting the same method, and then the wavelength conversion element 11 in which the fluorescent layer 111 and the filter layer 112 are in direct contact is obtained by curing.
A schematic structural diagram of a laser fluorescent light source 40 including the wavelength conversion element 11 according to the present embodiment is shown in fig. 3. The laser fluorescent light source 40 includes an excitation light source 10, a wavelength conversion element 11, and a dichroic sheet 12.
Excitation light source 10 is configured to emit excitation light of a first wavelength distribution, such as a laser, and dichroic sheet 12 is configured to transmit light of a certain wavelength almost completely, while reflecting light of other wavelengths almost completely. In this embodiment, the dichroic plate 12 is located between the excitation light source 10 and the wavelength conversion element 11, and the fluorescent layer 111 is located on the side of the wavelength conversion element 11 facing the dichroic plate 12, that is, the excitation light emitted by the excitation light source 10 passes through the dichroic plate 12 before reaching the wavelength conversion element 11, and the dichroic plate 12 can transmit the excitation light with the first wavelength distribution, and make part of the incident excitation light converted by the fluorescent layer 111 reflected by the excitation light reflected into the filter layer 112.
The following describes the working principle of the laser fluorescent light source 40, taking the laser fluorescent light source 40 as a green laser fluorescent light source as an example: the excitation light source 10 is a blue laser for emitting excitation light with a first wavelength distribution, which in this embodiment is blue laser, and the first wavelength distribution includes 500-700nm, and the first wavelength distribution may be 490-710nm, 485-715nm, etc. The dichroic sheet 12 is a blue light-transmitting and yellow light-reflecting dichroic sheet, and is capable of transmitting excitation light of a first wavelength distribution and reflecting light of a second wavelength distribution converted by the fluorescent layer 111; the fluorescent layer 111 in the wavelength conversion element 11 is a silica gel encapsulated YAG/Ce fluorescent powder structure, and can convert light with a first wavelength distribution into light with a second wavelength distribution of 500-700 nm; the filter layer 112 in the wavelength conversion element 11 has a silica gel encapsulated colored glass powder structure, wherein the colored glass powder can absorb 550nm-700nm light in the light with the second wavelength distribution emitted by the fluorescent layer 111.
The blue laser light emitted from the excitation light source 10 is incident on the fluorescent layer 111 of the wavelength conversion element 11 after passing through the dichroic sheet 12, is converted into light of a second wavelength distribution of 500nm to 700nm by the wavelength conversion element 11, and one part of the light enters the filter layer 112, and the other part is scattered to the dichroic sheet 12 and then is further reflected into the filter layer 112. The filter layer 112 absorbs light of 550nm to 700nm among light of the second wavelength distribution, and light of 500nm to 550nm among light of the second wavelength distribution is emitted through the filter layer 112, thereby obtaining narrow band filtering of the third wavelength distribution. The refractive index of the filter layer 112 in the preferred wavelength conversion element is lower than that of the fluorescent layer 111, thereby improving the light extraction efficiency of the fluorescent layer 111.
Compared with the wavelength conversion element of the interference filter used in the prior art, the wavelength conversion element 11 of the embodiment adopts the colored glass of absorption type filtering as the filtering layer in the wavelength conversion element 11, the filtering performance is irrelevant to the direction of the incident light, and the cost is lower; meanwhile, no air gap exists between the filter layer 112 and the fluorescent layer 111, and heat generated by the fluorescent layer 111 directly dissipates through the filter layer 112 with better heat conduction and dissipation effects, so that the improvement of heat dissipation performance is facilitated; in addition, when the refractive index of the filter layer 112 in the wavelength conversion element 11 is lower than that of the fluorescent layer 111, the light extraction efficiency of the fluorescent layer 111 can also be improved.
Example two
Referring to fig. 2, the structure of the wavelength conversion element according to the second embodiment is the same as that of the first embodiment. The difference is that the fluorescent layer 111 and the filter layer 112 of the wavelength conversion element 11 in this embodiment are both glass structures. That is, in this embodiment, the first matrix of the fluorescent layer 111 and the second matrix of the filter layer 112 are glass frit.
The glass powders in the fluorescent layer 111 and the filter layer 112 may be the same or different, and when different types of glass powders are used, it is necessary to ensure that the thermal expansion coefficients of the first substrate and the second substrate are close, and the sintering temperatures are close. The refractive index of the glass frit used for the preferred filter layer 112 is lower than that of the glass frit used for the fluorescent layer 111, so that the light extraction efficiency of the light emitted from the fluorescent layer 111 can be improved. The glass frits described herein may be glass frits commonly found in the art, with silica and other oxides as the major components. It will be appreciated that the silica gel used in this embodiment may also be replaced by other types of organic carriers, such as epoxy resins.
The fluorescent layer 111 is mainly composed of fluorescent powder and glass powder, and can be formed by sintering and solidifying slurry mainly composed of fluorescent powder and glass powder precursors; the filter layer 112 is composed mainly of colored glass frit, which is formed by sintering and curing a slurry composed mainly of colored glass frit and glass frit precursor.
The wavelength conversion element 11 in this embodiment is prepared by integral sintering, and specifically comprises the following steps:
(1) And (3) preparing a fluorescent layer and a filter layer slurry: and selecting proper commercial fluorescent powder, uniformly mixing a proper amount of commercial fluorescent powder with glass powder and an organic carrier to obtain glass slurry containing the fluorescent powder. And selecting proper colored glass powder, and uniformly mixing a proper amount of colored glass powder with the glass powder and the organic carrier to obtain the filter layer slurry.
(2) And (5) molding and curing: the phosphor layer paste with proper thickness is coated on the substrate 110 by a knife coating method, and then dried to obtain a phosphor layer biscuit, for example, the phosphor layer paste with proper thickness is coated on the phosphor layer biscuit by the same method, and the phosphor layer and the filter layer are directly contacted with each other to obtain the wavelength conversion element biscuit after drying. After that, the glass-structured wavelength conversion element 11 is sintered at a suitable temperature to obtain the fluorescent layer 111 and the filter layer 112 in direct contact.
In addition to the advantageous effects of the wavelength conversion element of embodiment one, the wavelength conversion element of this embodiment has better heat resistance and reliability because both the phosphor layer and the filter layer contain glass frit components as compared to embodiment one.
Example III
The structure of the wavelength conversion element according to the third embodiment is different from that of the first and second embodiments in that the wavelength conversion element 21 in this embodiment includes a fluorescent layer 211, a filter layer 212, and a dichroic film 210, and the dichroic film 210 is directly plated on one side surface of the fluorescent layer 211 by magnetron sputtering or the like, and the filter layer 212 is bonded to the surface of the fluorescent layer 211 on the side facing away from the dichroic film 210, as shown in fig. 4.
The fluorescent layer 211 in this embodiment is a fluorescent ceramic layer, which is mainly a plate-shaped structure formed by mixing, sintering and solidifying fluorescent powder, ceramic powder and an organic binder. The filter layer 212 is a glass encapsulated colored glass frit structure. The composition of the filter layer 212 is the same as that of the filter layer 112 in the second embodiment.
The specific manufacturing method of the wavelength conversion element 21 according to the present embodiment is:
(1) Fluorescent layer 211 preparation: and selecting proper fluorescent ceramics, thinning to proper thickness, and polishing one side.
(2) Dichroic film 210 preparation: and plating a dichroic film on the polished surface of the fluorescent ceramic by using a magnetron sputtering mode and the like. The material of the dichroic film 210 may be a material known in the art and will not be described in detail herein.
(3) Filter layer 212 preparation: selecting proper colored glass powder, and uniformly mixing a proper amount of colored glass powder, the glass powder and an organic carrier to obtain filter layer slurry, wherein the thermal expansion coefficient of the glass powder is similar to that of fluorescent ceramics; coating the filter powder slurry on the fluorescent layer 211, such as by a knife coating mode, and drying to obtain a filter layer biscuit; after that, sintering is performed at a suitable temperature, and the wavelength conversion element 21 in which the fluorescent layer 211 and the filter layer 212 are in direct contact is obtained. The organic carrier is a silica gel precursor.
The laser fluorescent light source 50 using the wavelength conversion element 21 of the present embodiment is as shown in fig. 5, and includes an excitation light source 20 and the wavelength conversion element 21. The difference from the first and second embodiments is that the dichroic film 210 is directly plated on the fluorescent layer 211 in this embodiment, and the fluorescent layer 211 and the filter layer 212 constitute an integrated wavelength conversion element, so that no additional dichroic sheet is required. The dichroic film 210 is located on a side of the wavelength conversion element 21 facing the excitation light source 20, and excitation light emitted by the excitation light source 20 first passes through the dichroic film 210 and then enters the fluorescent layer 211. The dichroic film 210 has the same function as the dichroic sheet 12 in the first and second embodiments.
The wavelength conversion element in each of the above embodiments can be used as either a transmissive wavelength conversion element or a reflective wavelength conversion element.
The filter layer in the wavelength conversion element in each of the above embodiments contains the absorbing colored glass powder, and the fluorescent layer and the filter layer are in direct contact, and the filter layer containing the colored glass powder has better heat conduction and heat dissipation performance than air, so that the phenomenon of heat accumulation caused by air gaps between the fluorescent layer and the filter layer in the conventional laser fluorescent light source is avoided, and meanwhile, compared with the conventional wavelength conversion element, the cost is saved by using the colored glass as an effective filter substance of the filter layer. In addition, the direct contact of the filter layer and the fluorescent layer is beneficial to improving the light extraction efficiency of emergent light.
It will be evident to those skilled in the art that the application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is evident that the word "comprising" does not exclude other elements or steps, and that the singular does not exclude a plurality. Several of the means recited in the means claims can also be embodied by one and the same item of hardware or software. The terms first, second, etc. are used to denote a name, but not any particular order.
Finally, it should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present application without departing from the spirit and scope of the technical solution of the present application.
Claims (8)
1. A wavelength conversion element, comprising:
a fluorescent layer for converting the excitation light of the first wavelength distribution into a lasing light of the second wavelength distribution;
the filter layer is attached to the fluorescent layer and used for filtering the laser to obtain narrow-band emergent light with third wavelength distribution, and the filter layer contains colored glass powder; and
And a dichroic film formed directly on a surface of the fluorescent layer on a side facing away from the filter layer.
2. The wavelength converting element of claim 1 wherein the phosphor layer comprises a first matrix and a phosphor, the first matrix comprising at least one of silica gel, glass, and ceramic.
3. The wavelength converting element of claim 2 wherein the filter layer further comprises a second matrix comprising at least one of silica gel, glass.
4. The wavelength converting element of claim 3 wherein the refractive index of the second matrix in the filter layer is lower than the refractive index of the first matrix in the phosphor layer.
5. A laser fluorescent light source, comprising:
the excitation light source is used for emitting laser light with first wavelength distribution; and
The wavelength converting element according to any one of claims 1-4, said dichroic film being located on a side of said wavelength converting element facing said excitation light source.
6. A method for manufacturing a wavelength conversion element as claimed in any one of claims 3 to 4, comprising the steps of:
uniformly mixing the fluorescent powder with the original material of the first matrix to obtain fluorescent layer slurry or using a fluorescent layer; uniformly mixing the colored glass powder with the original material of the second matrix to obtain filter layer slurry; and
and curing the fluorescent layer slurry or the fluorescent layer and the filter layer slurry to obtain the wavelength conversion element.
7. The method of manufacturing a wavelength conversion element according to claim 6, wherein the step of curing the phosphor layer paste and the filter layer paste to obtain the wavelength conversion element comprises the steps of:
coating the fluorescent layer slurry on a substrate, curing to form a fluorescent layer biscuit, coating the optical filter layer slurry on the fluorescent layer biscuit, curing to form the optical filter layer biscuit, and curing the fluorescent layer biscuit and the optical filter layer biscuit to obtain the wavelength conversion element; or (b)
And coating the fluorescent layer slurry on a substrate, coating the filter layer slurry on the fluorescent layer slurry, and curing to obtain the wavelength conversion element.
8. The method of manufacturing a wavelength converting element according to claim 6,
and curing the fluorescent layer and the filter layer slurry to obtain the wavelength conversion element, wherein the method comprises the following steps of:
and coating the filter layer slurry on the fluorescent layer, and curing to obtain the wavelength conversion element.
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| PCT/CN2020/126555 WO2021093660A1 (en) | 2019-11-13 | 2020-11-04 | Wavelength conversion element and manufacturing method therefor, and laser fluorescent light source |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4529269A (en) * | 1982-06-23 | 1985-07-16 | Mutzhas Maximilian F | Radiation protection filter for plants |
| JP2008010556A (en) * | 2006-06-28 | 2008-01-17 | Stanley Electric Co Ltd | Led light source device and led backlight using the same |
| CN102522295A (en) * | 2011-12-30 | 2012-06-27 | 四川虹欧显示器件有限公司 | Plasma display panel, plasma display panel barrier slurry, and manufacturing method for back baseplate with plasma display panel barrier slurry |
| CN102645714A (en) * | 2011-11-09 | 2012-08-22 | 深圳市光峰光电技术有限公司 | Light source system and color wheel assembly of light source system |
| CN102830582A (en) * | 2012-06-04 | 2012-12-19 | 深圳市绎立锐光科技开发有限公司 | Light-emitting device and related projection system thereof |
| CN104566229A (en) * | 2013-10-15 | 2015-04-29 | 深圳市光峰光电技术有限公司 | Manufacturing method of wavelength conversion device |
| JP2018054667A (en) * | 2016-09-26 | 2018-04-05 | パナソニックＩｐマネジメント株式会社 | Light source device, and projection type picture display device |
| CN108023004A (en) * | 2016-11-02 | 2018-05-11 | 日本电气硝子株式会社 | The manufacture method of wavelength convert component, luminescent device and wavelength convert component |
| CN108469645A (en) * | 2018-04-18 | 2018-08-31 | 浙江大学 | A kind of polarizing filter element and preparation method thereof |
| CN108803213A (en) * | 2017-04-27 | 2018-11-13 | 中强光电股份有限公司 | Wavelength convert filtration module and lighting system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202708991U (en) * | 2012-06-29 | 2013-01-30 | 深圳市绎立锐光科技开发有限公司 | Wavelength conversion device, light-emitting device and relevant projection system |
| CN205679529U (en) * | 2016-06-03 | 2016-11-09 | 湖南华南光电科技股份有限公司 | A kind of portable trace explosive survey meter |
| JP2018105941A (en) * | 2016-12-22 | 2018-07-05 | スタンレー電気株式会社 | Light emitting wheel |
-
2019
- 2019-11-13 CN CN201911109163.2A patent/CN112799273B/en active Active
-
2020
- 2020-11-04 WO PCT/CN2020/126555 patent/WO2021093660A1/en active Application Filing
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4529269A (en) * | 1982-06-23 | 1985-07-16 | Mutzhas Maximilian F | Radiation protection filter for plants |
| JP2008010556A (en) * | 2006-06-28 | 2008-01-17 | Stanley Electric Co Ltd | Led light source device and led backlight using the same |
| CN102645714A (en) * | 2011-11-09 | 2012-08-22 | 深圳市光峰光电技术有限公司 | Light source system and color wheel assembly of light source system |
| CN102522295A (en) * | 2011-12-30 | 2012-06-27 | 四川虹欧显示器件有限公司 | Plasma display panel, plasma display panel barrier slurry, and manufacturing method for back baseplate with plasma display panel barrier slurry |
| CN102830582A (en) * | 2012-06-04 | 2012-12-19 | 深圳市绎立锐光科技开发有限公司 | Light-emitting device and related projection system thereof |
| CN104566229A (en) * | 2013-10-15 | 2015-04-29 | 深圳市光峰光电技术有限公司 | Manufacturing method of wavelength conversion device |
| JP2018054667A (en) * | 2016-09-26 | 2018-04-05 | パナソニックＩｐマネジメント株式会社 | Light source device, and projection type picture display device |
| CN108023004A (en) * | 2016-11-02 | 2018-05-11 | 日本电气硝子株式会社 | The manufacture method of wavelength convert component, luminescent device and wavelength convert component |
| CN108803213A (en) * | 2017-04-27 | 2018-11-13 | 中强光电股份有限公司 | Wavelength convert filtration module and lighting system |
| CN108469645A (en) * | 2018-04-18 | 2018-08-31 | 浙江大学 | A kind of polarizing filter element and preparation method thereof |
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| CN112799273A (en) | 2021-05-14 |
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