CN110207025B - Light source system and lighting device - Google Patents

Light source system and lighting device Download PDF

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CN110207025B
CN110207025B CN201810166393.1A CN201810166393A CN110207025B CN 110207025 B CN110207025 B CN 110207025B CN 201810166393 A CN201810166393 A CN 201810166393A CN 110207025 B CN110207025 B CN 110207025B
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optical waveguide
light
light source
waveguide medium
source system
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CN110207025A (en
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周萌
李屹
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YLX Inc
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YLX Inc
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Priority to PCT/CN2018/094730 priority patent/WO2019165741A1/en
Priority to PCT/CN2018/095490 priority patent/WO2019165747A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F21V19/0015—Fastening arrangements intended to retain light sources
    • F21V19/002—Fastening arrangements intended to retain light sources the fastening means engaging the encapsulation or the packaging of the semiconductor device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/503—Cooling arrangements characterised by the adaptation for cooling of specific components of light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F21V5/045—Refractors for light sources of lens shape the lens having discontinuous faces, e.g. Fresnel lenses
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/30—Semiconductor lasers

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  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Semiconductor Lasers (AREA)
  • Planar Illumination Modules (AREA)

Abstract

The invention discloses a light source system and a lighting device, comprising: at least one laser light source for emitting excitation light; the optical waveguide medium is arranged on an emergent light path of the laser light source, and one surface of the optical waveguide medium is provided with an optical microstructure for totally reflecting exciting light incident into the optical waveguide medium; the radiating substrate is concave to form a first groove, the bottom of the first groove is concave to form a second groove, the first groove is used for placing an optical waveguide medium, the wavelength conversion layer is arranged in the second groove and used for converting part of exciting light emitted from the optical waveguide medium into excited light, and the excited light and the exciting light which is not converted by the wavelength conversion layer form illuminating light. Through the above embodiment, the white light illumination light source with high energy, high brightness and small volume is realized, and the problems of laser chip heat dissipation and wavelength conversion material heat dissipation can be solved.

Description

Light source system and lighting device
Technical Field
The present application relates to the field of lighting technologies, and in particular, to a light source system and a lighting device.
Background
At present, a solid-state Light source in the illumination field is mainly a white Light Emitting Diode (LED), wherein a blue Light chip and fluorescent powders with different colors are adopted to realize white Light output, which is a mainstream scheme of current white Light LED illumination, but the blue Light LED has an efficiency dip phenomenon, that is, with the increase of driving power density, the Light Emitting efficiency is attenuated rapidly, and the blue Light LED chip can only work under a smaller driving power density to generate a smaller luminous flux.
The light emitting principle of a blue Laser diode (Laser diode) is stimulated radiation, the phenomenon of efficiency dip does not exist, the blue Laser diode can work under high driving power density, and higher luminous flux is generated. The light source using the LD can obtain a luminance several tens times higher than that of the LED. For applications where volume and etendue are severely limited, LDs have inherent advantages as light sources. Blue LD has many advantages as an excitation source: (1) the phenomenon of efficiency dip is avoided, so that the cost of the light source can be reduced by improving the light intensity of a single chip; (2) near monochromaticity, a suitable phosphor can be matched according to the output wavelength of the LD to realize high conversion efficiency; (3) the volume is smaller, the brightness is higher, and the terminal illuminator is easier to design; (4) has better controllability including adjustable light color, controllable time space and the like. The blue LD may be the best substitute for the blue LED.
At present, a solid-state light source based on a blue-ray LD still has certain technical problems, such as heat dissipation problem of a blue-ray LD chip and a wavelength conversion material, safety problem of the blue-ray LD, and uniformity problem of mixed light.
Disclosure of Invention
The application provides a light source system and a lighting device, realizes a white light illumination light source with high energy, high brightness and small volume, and can solve the problems of heat dissipation of a laser chip and heat dissipation of a wavelength conversion material.
In order to solve the technical problem, the application adopts a technical scheme that: there is provided a light source system comprising: at least one laser light source for emitting excitation light; the optical waveguide medium is arranged on an emergent light path of the laser light source, and one surface of the optical waveguide medium is provided with an optical microstructure for totally reflecting the exciting light incident into the optical waveguide medium; the heat dissipation substrate is sunken to form a first groove, the bottom of the first groove is sunken to form a second groove, and the first groove is used for placing the optical waveguide medium; and the wavelength conversion layer is arranged in the second groove and used for converting part of the exciting light emitted from the optical waveguide medium into excited light, and the excited light and the exciting light which is not converted by the wavelength conversion layer form illumination light.
In order to solve the above technical problem, another technical solution adopted by the present application is: there is provided a lighting device comprising a light source system as described in any one of the above.
The beneficial effect of this application is: the laser source and the wavelength conversion layer are packaged together by using the same heat dissipation substrate, and the light guide medium is arranged, so that laser entering the wavelength conversion layer after passing through the light guide medium is more uniform, mixed light emitted after passing through the wavelength conversion layer is more uniform, the high-energy high-brightness small-volume white light illumination light source can be realized, and the problems of heat dissipation of a laser chip and heat dissipation of a wavelength conversion material can be solved.
Drawings
FIG. 1 is a schematic side view of a light source system according to a first embodiment of the present application;
FIG. 2 is a schematic top view of a first embodiment of a light source system according to the present application;
FIG. 3 is a schematic structural diagram of a first embodiment of an optical microstructure of the present application;
FIG. 4 is a schematic structural diagram of a second embodiment of an optical microstructure according to the present application;
FIG. 5 is a schematic structural view of a third embodiment of an optical microstructure according to the present application;
FIG. 6 is a schematic structural diagram of a fourth embodiment of an optical microstructure of the present application;
FIG. 7 is a schematic top view of a second embodiment of a light source system of the present application;
fig. 8 is a schematic structural diagram of an embodiment of the lighting device of the present application.
Detailed description of the preferred embodiments
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic side sectional view of a light source system according to a first embodiment of the present application, and fig. 2 is a schematic top view of the light source system according to the first embodiment of the present application, in which an improved light source system 10 includes:
the device comprises at least one laser light source 11 for emitting exciting light, an optical waveguide medium 12 for conducting and reflecting the exciting light emitted by the laser light source 11, a wavelength conversion layer 13 for receiving the exciting light conducted and reflected by the optical waveguide medium 12 and performing wavelength conversion on the exciting light, and a heat dissipation substrate 14 for dissipating heat, wherein the structure of the heat dissipation substrate 14 is specifically arranged as a groove.
The laser light source 11 is packaged on the heat dissipation substrate 14, and specifically, the laser light source in this embodiment is a blue laser diode, and the laser light source is disposed on the surface of the heat dissipation substrate 14 around a groove of the heat dissipation substrate 14. This application adopts blue light laser diode to have efficient, small, longe-lived advantage, and the light that sends is highly concentrated. In other embodiments, a violet laser diode may also be used, and is not further limited herein. In addition, in the present application, the number of the laser light sources 11 may be one or more, and in this embodiment, the number of the laser light sources 11 is two.
Optionally, in a specific embodiment, the light source system 10 may further include a laser shaping and deflecting device a, where the laser shaping and deflecting device a is disposed on an output light path of the laser light source 11, and is configured to shape and deflect an excitation light beam emitted by the laser light source 11, specifically, shape the excitation light beam, so that an divergence angle of the excitation light beam is effectively compressed to form a light beam conforming to a required shape, and adjust a deflection angle of the excitation light beam, so that the excitation light beam may be coupled into the optical waveguide medium 12 at a certain angle. Alternatively, in this embodiment, the laser shaping and deflecting device a may be one of a micro prism and a micro aspheric lens.
And the optical waveguide medium 12 is arranged on an emergent light path of the laser light source 11, and one surface of the optical waveguide medium 12 is provided with an optical microstructure B for totally reflecting exciting light incident into the optical waveguide medium 12.
Optionally, in this application, the optical waveguide medium 12 may be a transparent low-loss optical medium, and the side walls of the optical waveguide medium 12 are all provided with a total reflection film (not shown), the total reflection film can enable the excitation light emitted by the laser light source to transmit at a small angle, the excitation light after passing through the wavelength conversion layer 13 and a part of the scattered excitation light that is not converted will exit from the optical waveguide 12, and the excitation light that is not converted by the wavelength conversion layer 13 enters the optical waveguide medium 12 at a large angle and finally exits from the optical waveguide.
In this embodiment, a total reflection film is disposed around the optical waveguide medium 12, so that the optical waveguide medium 12 forms a resonant cavity, and excitation light emitted by the laser light source 11 is coupled into the optical waveguide medium 12 through the total reflection film on the sidewall of the optical waveguide medium 12, so as to improve the utilization rate of blue laser light.
Optionally, the optical microstructure B in this application may be a fresnel structure, and is configured to perform total reflection on the excitation light incident on the surface of the optical microstructure B, and meanwhile, the optical microstructure B may also ensure that the light reflected by the optical microstructure B does not satisfy total reflection on the side of the optical waveguide medium 12 away from the optical microstructure B, and is further incident into the wavelength conversion layer 13.
In a specific embodiment, the vertex angle of the fresnel structure and the incident angle of the excitation light incident into the optical waveguide medium satisfy different total reflection conditions, and may be specifically set as one of sequentially decreasing and changing the vertex angle along the symmetric center line thereof, sequentially increasing or decreasing and changing the vertex angle along the symmetric center line thereof, or equaling the vertex angle, where the specific conditions are described as follows:
1. the incident angle of the exciting light entering the optical waveguide medium is decreased gradually, and the vertex angle of the Fresnel structure is decreased gradually along the symmetrical center line of the Fresnel structure.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a first embodiment of an optical microstructure according to the present application. As shown in fig. 3, the optical microstructure B can make the light incident on its upper surface totally reflected, and at the same time, ensure that the light reflected by the upper surface does not satisfy the total emission condition at its lower surface, and all can exit from the lower surface of the optical waveguide medium 12 to enter into the wavelength conversion layer 13. In this embodiment, the incident angle α of the excitation light and the double prism vertex angle θ of the fresnel structure on the upper surface of the optical waveguide medium have the following relationship:
Figure GDA0003141298050000041
where n is the refractive index of the optical waveguide medium 12, and α is the incident angle of the excitation light entering the optical waveguide medium 12, that is, the included angle between the excitation light and the horizontal direction of the optical waveguide medium 12. Alternatively, the incident angle α may be in any range from 0 ° to 90 °, and in this embodiment, the incident angle α is sequentially increased, that is, α is satisfied1>α0>αmThe vertex angle theta of the Fresnel structure has the following relation theta1>θ2>θm。
Referring to fig. 4, fig. 4 is a schematic structural diagram of a second embodiment of an optical microstructure according to the present application.
As shown in fig. 4, the optical microstructure B in this embodiment is a further development on the basis of the first embodiment of the optical microstructure, the optical microstructure B in this embodiment may be a periodic arrangement structure as shown in fig. 4, and the vertex angle θ of the fresnel structure has the following relationship θ 1> θ 2> θ m. Compared with the first embodiment, the present embodiment has an advantage that the excitation light can cross and enter the upper surface of the optical waveguide medium 12, be reflected by the upper surface of the optical waveguide medium 12, and exit from the lower surface, so that the excitation light irradiated on the wavelength conversion layer 13 is more uniform.
2. The incidence angles of the exciting light entering the optical waveguide medium are sequentially reduced, and the vertex angles of the Fresnel structures are equal.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a third embodiment of an optical microstructure according to the present application.
As shown in fig. 5, the optical microstructure B in this embodiment is a further development of the first embodiment of the optical microstructure, the optical microstructure B in this embodiment may be a periodic arrangement structure as shown in fig. 5, and the top angle θ of the fresnel structure has the following relationship θ 1 ═ θ 2 ═ θ m. And the vertex angle of the optical microstructure B and the maximum value alpha of the incidence angle of the exciting lightmaxAnd (2) correlation, wherein the two satisfy the following relation:
Figure GDA0003141298050000051
wherein n is the refractive index of the optical waveguide medium 12, and this design can ensure that all the excitation light emitted by the excitation light source 11 can be totally reflected on the upper surface of the optical waveguide medium 12 and can be emitted from the lower surface of the optical waveguide medium 12. Compared with the optical microstructure in the first embodiment, the fresnel structure in this embodiment is easier and easier to process, and the same effect can be achieved.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a fourth embodiment of an optical microstructure according to the present application.
As shown in fig. 6, the optical microstructure B in this embodiment is a further development on the basis of the first embodiment of the optical microstructure, the optical microstructure B in this embodiment may be a periodic arrangement structure as shown in fig. 6, and the vertex angle θ of the fresnel structure satisfies the following condition:
Figure GDA0003141298050000061
wherein n is the refractive index of the optical waveguide medium 12, and the maximum value alpha of the vertex angle of the optical microstructure B and the incidence angle of the exciting lightmaxIn this regard, the principle is similar to that of the first to third embodiments described above, and the description thereof is omitted. In addition, compared to the first to third embodiments, the optical microstructure B in this embodiment is disposed in a manner that the excitation light can be incident on the upper surface of the optical waveguide medium 12 in a crossed manner, and the complexity of the processing process can be reduced to a certain extent.
The specific structure of the optical microstructure may be changed with the specific arrangement of the excitation light source, so that all the excitation light emitted from the excitation light source can be totally reflected on the upper optical microstructure of the optical waveguide medium 12 and emitted from the lower surface of the optical waveguide medium 12.
The heat dissipation substrate 14 is made of a material with a high thermal conductivity coefficient, and may specifically adopt one of an aluminum nitride substrate, a silicon carbide substrate, a boron nitride substrate, a metal copper substrate, and an aluminum substrate, which is not further limited herein. Optionally, the heat dissipation substrate is recessed to form a first groove X, and the bottom of the first groove is recessed to form a second groove Y, where the first groove X is used for placing the optical waveguide medium 12. The inner walls (including the side walls and the bottom wall) of the second grooves Y are provided with a reflective layer D, in a specific embodiment, the reflective layer D may be made of a diffuse reflective material, or may be made of a metal reflective material, and in other embodiments, the inner walls of the second grooves may be directly irradiated by excitation light to form an uneven diffuse reflective layer.
The wavelength conversion layer 13 is disposed in the second groove Y, and is configured to convert part of the excitation light emitted from the optical waveguide medium 12 into stimulated light, and the stimulated light and the excitation light that is not converted by the wavelength conversion layer 13 form illumination light. The surface of the wavelength conversion layer 13 may be roughened to improve the light extraction efficiency of the phosphor and reduce the reflection loss during large-angle glancing. In a specific embodiment, the excitation light entering from the optical waveguide medium 12 finally enters the wavelength conversion layer 13, a part of the excitation light entering the wavelength conversion layer 13 is converted into stimulated light by optimizing the thickness of the reflection layer 13 and the concentration of the fluorescent material in the fluorescent reflection layer 13, a part of the stimulated light is directly emitted from the lower surface of the optical waveguide medium 12 after being mixed with the laser light, and the rest of the excitation light and the stimulated light are mixed, reflected by the reflection layer on the inner wall of the second groove Y, generate illumination light by the optical waveguide medium 12, and are emitted from the optical waveguide medium 12.
In a specific embodiment, when a blue laser diode is used as the laser light source, the wavelength conversion layer 13 may be made of a yellow fluorescent material, and the yellow light is excited under the action of the blue light emitted from the laser light source, and the yellow light and the blue light of the non-excited fluorescent material are mixed to obtain white light illumination light. In other embodiments, the material of the wavelength conversion layer 13 may also be a mixture of a red fluorescent material and a green fluorescent material.
When an ultraviolet laser diode is used as a laser light source, the fluorescence conversion layer 13 may be formed by mixing fluorescent materials of at least two colors, specifically, red, green and blue fluorescent materials, and the fluorescent materials are mixed under the action of ultraviolet light emitted by the light source to obtain white light illumination light. Of course, the fluorescent material may be a mixture of two complementary colors, such as a yellow + blue fluorescent material, a magenta + green fluorescent material, and a red + cyan fluorescent material, which are excited by ultraviolet light to synthesize white light.
The following is a brief description of the principles of the light source system described above:
taking a blue laser light source as an example, blue light emitted by the blue laser light source 11 is incident to the optical waveguide medium 12 after the deflection angle of the blue light is adjusted by the laser shaping deflection device a, and is totally reflected when being incident to the optical microstructure B (fresnel structure) on the upper surface of the optical waveguide medium 12, and the vertex angle of the fresnel structure is related to the incident angle of the excitation light, so that the light incident to the fresnel structure can be totally reflected, and meanwhile, it is ensured that the light reflected by the upper surface does not satisfy the full emission condition on the lower surface, and thus enters the wavelength conversion layer 13. Part of the blue light incident to the wavelength conversion layer 13 is converted into excited yellow light, and the rest blue light is reflected by the reflection layer on the inner wall of the second groove and then mixed with the excited yellow light to generate illumination light, and the illumination light is emitted from the optical waveguide medium 12 to realize white light illumination.
In the above embodiment, the laser light source and the wavelength conversion layer are packaged together by using the same heat dissipation substrate, and the optical waveguide medium is arranged, so that laser light entering the wavelength conversion layer after passing through the optical waveguide medium is more uniform, and mixed light emitted after passing through the wavelength conversion layer is more uniform, so that the white light illumination light source with high energy, high brightness and small volume is realized, and the problems of heat dissipation of the laser chip and heat dissipation of the wavelength conversion material can be solved.
Referring to fig. 7, fig. 7 is a schematic top view structure diagram of a light source system according to a second embodiment of the present application. The light source system 20 improved in the present embodiment includes: at least one laser light source 21, an optical waveguide medium 22, a heat dissipating substrate 24, and a wavelength conversion layer 23.
The laser light source 21 is packaged on the heat dissipation substrate 24, and specifically, the laser light source is disposed on the surface of the heat dissipation substrate 24 around the first groove of the heat dissipation substrate 24, and the laser light source in this embodiment adopts a blue laser diode, which has the advantages of high efficiency, small volume, and long service life, and the emitted light is highly concentrated. In other embodiments, a violet laser diode may also be used, and is not further limited herein. In addition, in the present application, the number of the laser light sources 21 may be one or more, and in this embodiment, the number of the laser light sources 21 is four. Of course, in other embodiments, there may be 8, 12, 16, etc., and no further limitation is made herein.
Compared with the arrangement mode in which the laser light sources are arranged in two directions in the first embodiment, the laser light sources 21 in this embodiment are arranged around the optical waveguide medium 22, which is advantageous in that the excitation light emitted by the laser light sources in this embodiment can be more uniformly irradiated on the wavelength conversion layer 23 after being coupled by the optical waveguide medium 22.
And the optical waveguide medium 22 is arranged on an emergent light path of the laser light source 21, and one surface of the optical waveguide medium 22 is provided with an optical microstructure for totally reflecting exciting light incident into the optical waveguide medium 22. The arrangement of the optical microstructure in this embodiment is related to the arrangement direction of the laser light source 21, so as to ensure that all the excitation light can be totally reflected on the upper surface of the optical waveguide medium 22 and exit from the lower surface of the optical waveguide medium 22.
And the heat dissipation substrate 24 is recessed to form a first groove, the bottom of the first groove is recessed to form a second groove, and the first groove is used for placing the optical waveguide medium 22.
And the wavelength conversion layer 23 is arranged in the second groove and is used for converting part of the exciting light emitted from the optical waveguide medium into stimulated light, and the stimulated light and the exciting light which is not converted by the wavelength conversion layer form illumination light.
The detailed structure and principle of the light source system in the above embodiments are described in detail in the first embodiment of the light source system of the present application, and are not described herein again.
In the above embodiment, the laser light source and the wavelength conversion layer are packaged together by using the same heat dissipation substrate, and the optical waveguide medium is arranged, so that laser entering the wavelength conversion layer after passing through the optical waveguide medium is more uniform, and simultaneously, mixed light emitted after passing through the wavelength conversion layer is more uniform, thereby realizing a white light illumination light source with high energy, high brightness and small volume, and solving the problems of heat dissipation of the laser chip and heat dissipation of the wavelength conversion material.
Referring to fig. 8, fig. 8 is a schematic structural diagram of an embodiment of a lighting device according to the present application. The lighting device 30 in the present application may be a lighting lamp, a stage lamp, a car lamp, or other laser lamps, and includes the light source system E with any one of the above structures, and the specific structure and the implementation principle of the light source system E may be referred to in the detailed description of the above embodiments, which is not described herein again.
In summary, it is easily understood by those skilled in the art that the present application provides a light source system and a lighting device, which can realize a high-energy, high-brightness and small-volume white light illumination light source by packaging a laser light source and a wavelength conversion layer together by using the same heat dissipation substrate, and can solve the problems of heat dissipation of a laser chip and heat dissipation of a wavelength conversion material.
The above embodiments are merely examples and are not intended to limit the scope of the present disclosure, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present disclosure or those directly or indirectly applied to other related technical fields are intended to be included in the scope of the present disclosure.

Claims (11)

1. A light source system, comprising:
at least one laser light source for emitting excitation light;
the optical waveguide medium is arranged on an emergent light path of the laser light source, and one surface of the optical waveguide medium is provided with an optical microstructure for totally reflecting the exciting light incident into the optical waveguide medium;
the heat dissipation substrate is sunken to form a first groove, the bottom of the first groove is sunken to form a second groove, and the first groove is used for placing the optical waveguide medium;
and the wavelength conversion layer is arranged in the second groove, the bottom wall of the second groove is provided with a reflection layer, the reflection layer is used for converting part of exciting light emitted from the optical waveguide medium into excited light, and the excited light and the exciting light which is not converted by the wavelength conversion layer form illumination light.
2. The light source system of claim 1, wherein the optical microstructures are fresnel structures, and wherein the apex angle of the fresnel structures is related to the incidence angle of the excitation light into the optical waveguide medium.
3. The light source system according to claim 2, wherein the incidence angles of the excitation light entering the optical waveguide medium decrease sequentially, and the top angle of the fresnel structure changes sequentially and gradually along the symmetrical center line of the top angle of the fresnel structure.
4. The light source system according to claim 2, wherein the incident angles of the excitation lights entering the light guide medium decrease sequentially, and the top angles of the fresnel structures are equal.
5. A light source system according to any one of claims 2 to 4, wherein the apex angle θ of the Fresnel structure is:
Figure FDA0003141298040000011
wherein n is the refractive index of the optical waveguide medium, and α is the incident angle of the excitation light into the optical waveguide medium.
6. A light source system according to any one of claims 2 to 4, wherein the apex angle θ of the Fresnel structure is:
Figure FDA0003141298040000021
wherein n is the refractive index of the optical waveguide medium, alphamaxIs the maximum incident angle of the excitation light into the optical waveguide medium.
7. A light source system according to any one of claims 2 to 4, wherein the apex angle θ of the Fresnel structure is:
Figure FDA0003141298040000022
wherein n is the refractive index of the optical waveguide medium, alphamaxIs the maximum incident angle of the excitation light into the optical waveguide medium.
8. The light source system according to claim 1, wherein the side walls of the optical waveguide medium are each provided with a total reflection film for coupling the excitation light into the optical waveguide medium.
9. The light source system of claim 1, further comprising a reflective layer disposed on an inner wall of the second recess.
10. The light source system of claim 1, further comprising a laser shaping deflection device disposed between the laser light source and the optical waveguide medium.
11. A lighting device, characterized in that the lighting device comprises the light source system of any one of claims 1 to 10.
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