Light source device and lighting apparatus

Abstract

The present application relates to a kind of light source device and lighting equipment, mainly related to electronic device packaging technical field.Light source device includes package shell module, 2n light source module, wavelength conversion piece and cover module.Packaging shell module includes substrate and dam, dam is arranged on the surface of substrate, dam is arranged around to define accommodating space.Wavelength conversion piece is arranged in accommodating space and is stacked on substrate;Wavelength conversion piece includes excitation surface and reflection surface facing away, reflection surface is towards substrate;Wavelength conversion piece has midperpendicular.Light source module is arranged in accommodating space, each light source module is equipped with excitation light source, excitation surface is located on the light path of excitation light.2n light source module is divided into n groups of light source module, and each group of light source module includes two light source modules;Two light source modules in each group of light source module are distributed on the outer periphery of wavelength conversion piece, and are symmetrically arranged about midperpendicular.The excitation light utilization rate of the above-mentioned light source device is relatively high, and light spot is more uniform.

Description

Technical Field

[0001] This application relates to the field of electronic device packaging technology, and in particular to a light source device and lighting equipment. Background Technology

[0002] Surface mount devices (SMDs) are widely used in consumer electronics, automotive electronics, and medical devices due to their small size. In SMD manufacturing, SMD packaging technology is typically used to encapsulate electronic devices. These devices are usually semiconductor chips, light sources, thermistors, or other semiconductor components. Taking a light source as an example, during SMD packaging, the light source is fixed in a package structure (such as an SMD housing) using soldering or die-bonding processes, and then protected by an SMD housing with optical windows, thus obtaining the SMD light source.

[0003] In related technologies, a transmissive wavelength conversion scheme is formed by directly sealing the SMD housing with a wavelength conversion component. Typically, the wavelength conversion component directly receives the illumination from the light source and generates excitation light that is emitted outwards. However, due to the poor thermal conductivity of the wavelength conversion component itself and its essentially suspended structure without efficient heat conduction, the wavelength conversion element is prone to high-temperature quenching and damage. Summary of the Invention

[0004] In view of this, embodiments of this application provide a light source device and lighting equipment with better heat dissipation to solve the above-mentioned technical problems.

[0005] In a first aspect, embodiments of this application provide a light source device, including a housing module, 2n light source modules, and a wavelength conversion element. The housing module includes a substrate and a dam, the dam being disposed on the surface of the substrate and protruding relative to the surface of the substrate, the dam surrounding the substrate to define an accommodating space. The wavelength conversion element is disposed in the accommodating space and stacked on the substrate; the wavelength conversion element includes an excitation surface and a reflection surface facing away from each other, the reflection surface facing the substrate; the wavelength conversion element has a perpendicular bisector. The 2n light source modules are disposed in the accommodating space, where n is an integer greater than or equal to 1; each light source module has an excitation light source, the excitation surface being located in the optical path of the excitation light emitted by the excitation light source. The 2n light source modules are divided into n groups of light source modules, each group including two light source modules; the two light source modules in each group are distributed on the outer periphery of the wavelength conversion element and are symmetrically arranged about the perpendicular bisector.

[0006] Secondly, embodiments of this application also provide a lighting device, which includes a circuit board and the aforementioned light source device, wherein the substrate of the light source device is connected to the circuit board.

[0007] Compared to existing technologies, in this embodiment, a wavelength conversion element is disposed on a substrate. When the excitation light from the excitation source irradiates the wavelength conversion element, the excitation light does not penetrate the element but is absorbed and generated as emitted laser light. This emitted laser light consists of light of the excitation light wavelength (which can be considered the excitation light itself) and longer wavelength light generated by photoluminescence (converted by the wavelength conversion element). Due to the reflection effect of the reflective surface of the wavelength conversion element, the emitted laser light is redirected towards the emitting surface. Therefore, apart from heat loss due to photoluminescence, the energy of the excitation light is almost entirely utilized to generate emitted laser light. This improves the overall luminous efficiency and brightness of the light source device, especially in applications requiring high brightness output, where this design significantly enhances the performance of the light source device.

[0008] Furthermore, the wavelength conversion element is disposed on the substrate. The substrate can effectively absorb the heat generated by the wavelength conversion element during the conversion of excitation light into laser light (photoluminescence), and rapidly conduct the heat to the environment (e.g., to a heat sink) through its thermal conductivity. As an example, the substrate can be a substrate made of a composite material with high thermal conductivity (such as copper-clad aluminum nitride, alumina, or silicon carbide substrates). In this embodiment, by combining the wavelength conversion element with the substrate, the performance degradation of the wavelength conversion element caused by heat accumulation generated by illumination is effectively avoided, enabling the wavelength conversion element to withstand higher power excitation light, thereby improving the brightness and power of the entire light source device and ensuring high stability of the light source device.

[0009] Furthermore, in the embodiments of this application, the number of light source modules is even. Two light source modules in each group are symmetrically arranged about the perpendicular bisector of the wavelength conversion element. This ensures that the optical paths of the two excitation beams in each group are symmetrically arranged about the perpendicular bisector. After the light spots of the two excitation beams combine at the wavelength conversion element, the intensity regions and shapes of the two light spots are complementary, resulting in a relatively uniform distribution of the combined light spot. By setting n groups of light source modules, the complementarity of n light spots can be achieved, making the light spot formed on the wavelength conversion element closer to a circle and its distribution more uniform. Attached Figure Description

[0010] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the structure of a light source device provided in an embodiment of this application.

[0012] Figure 2 This is a schematic diagram of the structure of a lighting device provided in an embodiment of this application.

[0013] Figure 3 yes Figure 1 A schematic diagram of the light source device with the cover module omitted, shown in orthographic projection.

[0014] Figure 4 yes Figure 3 The diagram shows an exploded view of the wavelength conversion component and substrate of the light source device.

[0015] Figure 5 yes Figure 3 The diagram shows the structure of the light source module and wavelength conversion component of the light source device.

[0016] Figure 6 yes Figure 5 The diagram shows a schematic orthographic projection of the light source module and wavelength conversion device.

[0017] Figure 7 yes Figure 1 The schematic diagram of the cover module is omitted in one embodiment of the light source device shown.

[0018] Figure 8 yes Figure 7 A schematic diagram of the orthographic projection of the light source device shown.

[0019] Figure 9 yes Figure 1 An exploded view of another embodiment of the light source device shown.

[0020] Figure 10 yes Figure 9 A cross-sectional schematic diagram of the extinction module of the light source device shown.

[0021] Figure 11 yes Figure 9 A schematic diagram of the extinction frame of the light source device shown.

[0022] Figure 12 yes Figure 9 Another cross-sectional schematic diagram of the extinction module of the light source device shown.

[0023] Figure 13 yes Figure 1 A schematic diagram of another embodiment of the partial structure of the light source device shown.

[0024] Labeling Explanation: 500, Lighting equipment; 201, Circuit board; 203, Housing; 2031, Light emission window; 200, Light source device; 10, Encapsulation module; 12, Substrate; 121, First surface; 123, Second surface; 14, Dam; 141, Receiving space; 30, Covering module; 34, Wavelength conversion component; 345. Reflective layer; 3411. Reflective surface; 3413. Excitation surface; 343. Fluorescent layer; 50. Light source module; 52. Excitation light source; 54. Condensing lens; 55. Lens support; 56. Optical refracting element; 561. Reflective surface; 59. Diffuser; 60. Extinction module; 62. Extinction frame; 6201. Extinction cavity; 6203. Incident channel; 621. First end; 623. Second end; 625. Inner wall; 6251. First inner surface; 6253. Second inner surface; 6211. Extinction port; 6252. Light receiving port; 6231. Light emitting port; 64. Extinction sheet; 641. Hollow hole; 90. Feedback module; 94. Optical sensor; 96. Wire; 70. Light receiving module. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0026] It should be noted that when a component / part is said to be "fixed to" another component / part, it can be directly on the other component / part or there may be an intermediate component / part. When a component / part is considered to be "connected to" another component / part, it can be directly connected to the other component / part or there may be an intermediate component / part present; also, when a component / part is considered to be "connected to" another component / part, it can be integrally formed or assembled with the other component / part. When a component / part is considered to be "set on" another component / part, it can be directly set on the other component / part or there may be an intermediate component / part present.

[0027] Unless otherwise defined, 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 specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] Please see Figure 1This application provides a light source device 200 for emitting fluorescent light beams, which can be applied to lighting equipment as a light source. For example, the light source device 200 can be applied to products such as vehicle headlights, stage lighting, streetlights, home lighting, and display lighting.

[0029] Please see Figure 2 This application also provides a lighting device 500 configured with the aforementioned light source device 200. The lighting device 500 can be a vehicle headlight, stage lighting, street light, home lighting, ambient lighting, etc. The lighting device 500 can also be an optical projection device, such as a projection lamp or projector. The lighting device 500 can include a circuit board 201 and the aforementioned light source device 200, with the light source device 200 disposed on the circuit board 201.

[0030] The circuit board 201 can be a copper-based circuit board or an aluminum-based circuit board, or a printed circuit board (PCB) with a heat sink; this specification does not limit this. The circuit board 201 is used to carry the light source device 200. The circuit board 201 has conductive traces, conductive vias, and other structures to realize the electrical connection between the light source device 200 and the corresponding controller or transformer and other components.

[0031] The light source device 200 can be stacked on the circuit board 201 and electrically connected to the circuit board 201. Specifically, for example, the light source device 200 can be electrically connected to the circuit board 201 through components such as solder pads. The number of light source devices 200 is not limited, and there can be one or more. When there are multiple light source devices 200, such as two or more, the multiple light source devices 200 can be distributed on the circuit board 201, for example, multiple light source devices 200 can be arranged in an array and spaced apart from each other. The space between them can facilitate heat dissipation of the light source devices 200 and provide space for the external lenses required by the light source devices 200. These external lenses can be set in the optical path of the emitted light of the light source devices 200 for focusing and / or collimating, so that the emitted light meets the required emission angle and / or emission direction. The light source device 200 can be mounted on the circuit board 201 using surface mount technology (SMT), which can effectively save space and increase the light power and power density of the lighting equipment 500.

[0032] In some embodiments, the lighting device 500 may further include a housing 203, which is used to house the circuit board 201 and the light source device 200, and may also house other components of the lighting device 500 to protect the circuit board 201, the light source device 200, and other components. Taking a lighting fixture as an example, other components of the lighting device 500 may include a transformer, a controller, etc.; taking a projection lamp as an example, other components of the lighting device 500 may include a lens module, a light modulator, etc. The housing 203 may be provided with a light-emitting window 2031, which allows light from the light source device 200 to pass through and be emitted to the outside.

[0033] Please see Figure 1 and Figure 3 In this embodiment, the light source device 200 may include a housing module 10, a light source module 50, and a wavelength conversion component 34.

[0034] The encapsulation module 10 includes a substrate 12 and a dam 14. The substrate 12 is generally plate-shaped, for example, it can be a rectangular plate-shaped structure or a circular plate-shaped structure. As an example, the substrate 12 includes a first surface 121 and a second surface 123 that are opposite to each other, the first surface 121 and the second surface 123 being two relatively large surfaces on the plate-shaped structure. The dam 14 is disposed on the first surface 121 and protrudes relative to the first surface 121. The dam 14 is arranged around to define a receiving space 141 for accommodating the light source module 50. As an example, the dam 14 can be a circular cylindrical structure or a rectangular cylindrical structure, and the receiving space 141 is the space enclosed by its cylindrical structure.

[0035] In some embodiments, the light source device 200 may further include a cover module 30 ( Figure 1 The sealing module 30 covers one end of the receiving space 141 away from the substrate 12, so the sealing module 30 and the substrate 12 are located at opposite ends of the receiving space 141, thereby sealing the receiving space 141 to form a substantially closed cavity. The sealing module 30 is provided with a light-transmitting window 321 communicating with the receiving space 141. The light-transmitting window 321 is used to allow light to pass through, and it can be a transparent structure or covered with an optical cover plate, etc.

[0036] The number of light source modules 50 is 2n, where n is an integer greater than or equal to 1. The 2n light source modules 50 are disposed in the accommodating space 141, and each light source module 50 is equipped with an excitation light source 52, which is used to emit excitation light. The excitation light can be a laser beam or an LED beam with a relatively short wavelength; for example, the excitation light can be a blue laser or a violet laser, etc.

[0037] Wavelength conversion element 34 is disposed in receiving space 141 and stacked on substrate 12. Please also refer to Figure 3 and Figure 4 In this embodiment, the wavelength conversion element 34 includes a reflective surface 3411 and an excitation surface 3413 that are opposite to each other. The reflective surface 3411 faces the first surface 121 of the substrate 12, and the excitation surface 3413 is opposite to the substrate 12. As an example, the excitation surface 3413 can be located in the optical path of the excitation light emitted by the excitation light source 52. The wavelength conversion element 34 and the substrate 12 can be connected by adhesive bonding, sintered metal material bonding, welding bonding, etc. In some specific examples, the wavelength conversion element 34 can be a PIG phosphor sheet, a ceramic phosphor sheet, etc., which is not limited in this embodiment. It can be set according to the actual situation. It can be used to absorb the excitation light emitted by the excitation light source 52 and generate a laser beam. The laser beam can be used as the output light of the light source device 200 to meet the lighting needs of the terminal product. In the embodiments of this application, the laser beam should be interpreted broadly, which can include light of the excitation light wavelength (which can be considered as the excitation light itself) and longer wavelength light generated by photoluminescence (after conversion by the wavelength conversion element).

[0038] In this embodiment, the wavelength conversion element 34 can be a circular sheet, a rectangular sheet, or a sheet structure of other shapes. To facilitate the description of the spatial position of the wavelength conversion element 34, its structural / positional relationship with other components, or the direction of the optical path, this specification defines a perpendicular bisector O1 in the wavelength conversion element 34. The wavelength conversion element 34 has a perpendicular bisector O1, which is an imaginary geometric reference line extending along the thickness direction of the wavelength conversion element 34 (e.g., perpendicular to the wavelength conversion element 34) and passing through the geometric center point of the wavelength conversion element 34. When the wavelength conversion element 34 is circular, the perpendicular bisector O1 passes through the center of the circle. In other words, the perpendicular bisector O1 is perpendicular to the plane containing the wavelength conversion element 34 and symmetrically divides the wavelength conversion element 34 radially. Spatially, the perpendicular bisector O1 is perpendicular to both the upper and lower surfaces of the wavelength conversion element 34 and serves as a reference axis for describing the incident direction of the excitation light, the emitted direction of the laser, and the relative positional relationships of other components. In this embodiment, the vertical line O1 and the axis of the light-transmitting window 321 are approximately parallel or approximately coincident.

[0039] In this embodiment, the 2n light source modules 50 are divided into n groups of light source modules, and each group of light source modules 50 includes two light source modules 50; the two light source modules 50 in each group of light source modules 50 are distributed on the outer periphery of the wavelength conversion component and are symmetrically arranged about the vertical line.

[0040] Compared to existing technologies, in this embodiment, the wavelength conversion element 34 is disposed on the substrate 12, with the excitation surface 3413 of the wavelength conversion element 34 facing the light transmission window 321. When the excitation light from the excitation light source 52 irradiates the wavelength conversion element 34, the excitation light does not penetrate the wavelength conversion element 34, but is absorbed by the wavelength conversion element 34 to generate a laser beam. The laser beam includes light of the excitation light wavelength (which can be considered as the excitation light itself) and longer wavelength light generated by photoluminescence (after conversion by the wavelength conversion element). Due to the reflection effect of the reflective surface of the wavelength conversion element 34, part of the laser beam that is heading towards the reflective surface 3411 is redirected and moves towards the light-emitting surface 3413. Therefore, apart from the heat loss due to photoluminescence, the remaining laser beam energy is basically utilized to generate outgoing light that propagates to the light transmission window 321, thereby improving the overall luminous efficiency and brightness of the light source device 200. Especially in applications requiring high brightness output, this design can significantly improve the efficiency of the light source device 200. After multiple tests by the inventors, under various operating conditions, the wavelength conversion device 34 of the "reflective structure" provided in this application embodiment has a utilization rate of excitation light energy greater than or equal to 60%, which is far greater than the 40% utilization rate in related technologies.

[0041] Furthermore, the wavelength conversion element 34 typically generates significant heat during the conversion of excitation light into laser light. The wavelength conversion element 34 is disposed on the substrate 12, which absorbs the heat and rapidly conducts it to the environment (e.g., to a heat sink) through its superior thermal conductivity. As an example, the substrate 12 serves as the encapsulation substrate of the light source device 200. It can be a substrate made of a composite material with high thermal conductivity (e.g., copper-clad aluminum nitride, alumina, or silicon carbide substrates). In this embodiment, by combining the wavelength conversion element 34 with the substrate 12, the performance degradation of the wavelength conversion element 34 caused by heat accumulation from photoluminescence is effectively avoided. This allows the wavelength conversion element 34 to withstand higher power excitation light, thereby improving the brightness and power of the entire light source device 200 and ensuring its high stability.

[0042] Furthermore, in the embodiments of this application, the number of light source modules 50 is even. Two light source modules 50 in each group are symmetrically arranged about the perpendicular bisector O1 of the wavelength conversion element 34. This ensures that the optical paths of the two excitation beams in each group are symmetrically arranged about the perpendicular bisector O1. After the light spots of the two excitation beams combine at the wavelength conversion element 34, the intensity regions of the two light spots are complementary, resulting in a relatively uniform distribution of the combined light spot. By setting n groups of light source modules 50, the complementarity of n light spots can be achieved, making the light spot formed on the wavelength conversion element 34 closer to a circle and its distribution more uniform.

[0043] The following will describe in detail the various components of the light source device 200 provided in the embodiments of this application, with reference to the specific accompanying drawings and embodiments.

[0044] Please refer to it again. Figure 3 In this embodiment, the substrate 12 of the encapsulation module 10 is generally flat, serving to support the light source module 50 and to achieve electrical connection between the light source module 50 and the circuit board 201. The first surface 121 and the second surface 123 of the substrate 12 can both be planar structures. The first surface 121 is used to place the light source module 50 and the wavelength conversion component 34, while the second surface 123 serves as the base for placing the heat dissipation pads, and / or heat sinks, and / or electrodes of the light source device 200. As an example, the substrate 12 is an insulating substrate used to bond surface electronic devices or metal layers, providing insulation and thermal conductivity. As a specific example, the substrate 12 can be made of aluminum nitride ceramic, which has a thermal conductivity of approximately 200 W / mK. The substrate 12 can also be made of other insulating materials such as alumina ceramic substrates and glass substrates. As another specific example, the substrate 12 can also serve as a heat conductor. Its material can include an alumina substrate (Al2O3) with a thermal conductivity of 15 W / mK, a silicon carbide (SiC) substrate with a thermal conductivity of approximately 300 W / mK, or a diamond substrate with a thermal conductivity of approximately 2000 W / mK, thereby ensuring good heat conduction efficiency.

[0045] The dam 14 is located on the first surface 121 of the substrate 12. As an example, the dam 14 can be a metal structure with a certain height and a receiving space 141 formed by electroplating metal on the surface of the substrate 12, which can be regarded as an integrally formed connection with the substrate 12. The light source module 50 is installed in the receiving space 141 formed by the dam 14. The dam 14 protrudes relative to the first surface 121, and the height of the protrusion of the dam 14 is less than or equal to 2 mm. As an example, the height of the protrusion of the dam 14 can be 2 mm, 1.5 mm, 1 mm, 0.5 mm, or other heights that meet the above range.

[0046] As another example, the dam 14 can be a metal tubular structure, stacked on the surface of the substrate 12 and fixedly connected to the substrate 12, for example, it can be welded to the surface of the substrate 12 to improve the stability of the connection between the dam 14 and the substrate 12. In this embodiment, the dam 14 can be made of copper or copper alloy (e.g., tungsten copper or molybdenum copper) to ensure high heat dissipation efficiency and stability of the connection with the substrate 12. In some embodiments, the material of the dam 14 can also include Kovar alloy or SPCC (cold-rolled carbon steel sheet) to ensure weldability with the cap.

[0047] Wavelength conversion component 34 is stacked on substrate 12. In this embodiment, the wavelength conversion component 34 and substrate 12 can be connected by soldering. As an example, the side of the wavelength conversion component 34 facing the substrate 12 can be plated with a metal layer, and the wavelength conversion component 34 can be soldered to the substrate 12 through the metal layer using solder, such as gold-tin eutectic solder; it can also be connected using thermally conductive adhesive, such as silver paste, or by sintering materials, such as sintered silver, sintered gold, etc.

[0048] In some embodiments of this application, the wavelength conversion element 34 is a reflective wavelength conversion device. The wavelength conversion element 34 can be a phosphor, such as a PIG phosphor or a ceramic phosphor. Phosphors have relatively high conversion efficiency and a compact structure, and also have the characteristics of high selectivity and good stability, which helps to maintain good stability during long-term use.

[0049] Please see Figure 4 The fluorescent layer 343 has two opposing surfaces, namely the reflective surface 3411 and the excitation surface 3413. The reflective surface 3411 faces the direction of the substrate 12, and the excitation surface 3413 faces the direction of the light-transmitting window 321. The fluorescent layer 343 is used to absorb high-energy excitation light (such as violet laser, blue laser, etc.) and "convert" the excitation light into other colors of light with lower energy (such as yellow light, green light, red light, etc.). In some embodiments of this application, the color of the laser is not limited; for example, the laser can be visible light with a wavelength range of 400 nm to 700 nm. Of course, the laser can be white light composed of a mixture of multiple colors of visible light. When the required laser is white light, the fluorescent layer 343 can include fluorescent conversion materials of multiple colors to ensure the acquisition of high-quality white light. The phosphor layer 343 can be made of all-inorganic materials such as fluorescent glass ceramic (PIG) ​​or pure fluorescent ceramics with high thermal conductivity, such as YAG fluorescent ceramics, thereby ensuring high thermal conductivity (greater than 15W / mK). This ensures that the heat generated by photoluminescence during excitation is quickly dissipated, thus ensuring that the phosphor layer 343 can operate at a lower temperature, has high conversion efficiency, and a long service life.

[0050] In some embodiments, the wavelength conversion element 34 may further include a reflective layer 345, which reflects the excitation light and guides it through the phosphor layer 343 for light conversion. Specifically, the reflective layer 345 may be a film structure attached to the reflective surface 3411. For example, the reflective layer 345 may be fixed to the reflective surface 3411 by an adhesive or coating process. As an example, the reflective layer 345 may be made of a high-reflectivity material, such as a film made of metal materials like aluminum, silver, or platinum. A reflective layer 345 made of metal materials can effectively reflect the excitation light and reduce light loss. As another example, the reflective layer 345 may be a high-reflectivity dielectric coating material whose reflectivity is improved through a special coating technology.

[0051] Furthermore, in some embodiments, to improve the reflectivity of the reflective layer 345, the surface of the reflective layer 345 can be designed as a mirror structure or a microstructure. Taking the structure as an example, the surface where the reflective layer 345 and the reflective surface 3411 are attached can be a microstructured surface. The microstructured surface can include a microlens array or a micro-bump structure, thereby increasing the reflection efficiency of the reflective layer 345 and optimizing the direction of reflected light, which can further improve the focusing effect of light and ensure that the light can be effectively guided to the phosphor layer 343. Correspondingly, the reflective surface 3411 can also be a planar structure or a microstructured surface adapted to the surface of the reflective layer 345.

[0052] Please refer to it again. Figure 3 In this embodiment, the light source module 50 is disposed in the receiving space 141 and fixedly connected to the substrate 12. The light source module 50 and the substrate 12 can be connected by means of adhesive bonding, sintering of sintering materials, welding, etc.

[0053] This application does not limit the specific form of the excitation light source 52. For example, the excitation light source 52 can be a laser diode (LD) chip, a light-emitting diode (LED) chip, a laser crystal, etc. As an example, the power range of the excitation light source 52 in this embodiment is 5W~10W. For example, the excitation light source 52 can be a blue laser (Chip On Submount, COS) chip with a heat sink, and the wavelength range of the excitation light emitted is approximately 430~470nm. In some examples, the connection between the excitation light source 52 and the substrate 12 can be achieved by using high thermal conductivity gold paste (sintered gold) or silver paste (sintered silver), thereby achieving heat conduction and fixation.

[0054] In some embodiments, the light source module 50 may further include an optical deflector 56, which is disposed in the optical path of the excitation light and is used to guide the excitation light to the wavelength conversion element 34. In this embodiment, the optical deflector 56 may be a planar reflector or a reflective prism, and its reflective surface may be an outer surface or an inner surface.

[0055] Please see Figure 5 and Figure 6 In this embodiment, in each light source module 50, the optical deflector 56 and the excitation light source 52 are located at opposite ends of the wavelength conversion element 34 in the radial direction. This ensures that the optical deflector 56 and the excitation light source 52 avoid the space directly above the wavelength conversion element 34, and do not obstruct the outward propagation of laser light from directly above the wavelength conversion element 34, thus facilitating higher light utilization. As an example, the optical deflector 56 and the excitation light source 52 are both arranged on the substrate 12, and the straight line they define can be parallel to or coincide with the plane of the wavelength conversion element 34, thereby ensuring that the optical deflector 56 and the excitation light source 52 are located at opposite ends of the wavelength conversion element 34. It should be noted that the "radial" of the wavelength conversion element 34 mentioned in this specification should not be limited to the radial direction of a circular structure. It can be the radial direction of other structures such as square or triangular structures. Here, "radial" should be interpreted broadly, referring to the radial direction defined around the geometric center point of the wavelength conversion element 34. For example, the direction radiating from the geometric center point of the wavelength conversion element 34 to the outer periphery of the wavelength conversion element 34 is considered "radial". These radial directions can be distributed along different tangents of the circumference, depending on the specific geometric shape of the wavelength conversion element 34. In this embodiment, "the optical refractor 56 and the excitation source 52 are located at the two ends of the radial direction of the wavelength conversion element 34" does not mean that the optical refractor 56 and the excitation source 52 must be strictly limited to being distributed in the same radial direction. It is only necessary to restrict them to be arranged approximately along a certain radial direction or around the periphery of that radial direction, so that they are located at the two ends of the wavelength conversion element 34 without obstructing the excitation surface 3413. Furthermore, in some embodiments, when projected toward the plane where the wavelength conversion element 34 is located, the projected outlines of the optical deflector 56 and the excitation light source 52 in each light source module 50 are located on both sides of the wavelength conversion element 34, and the projected outlines of the optical deflector 56 and the excitation light source 52 do not overlap with the projected outline of the wavelength conversion element 34. In this embodiment, by setting the optical deflector 56, the optical path of the excitation light during its propagation to the wavelength conversion element 34 can be adjusted, which is beneficial to make full use of the structure of the accommodating space 141 to arrange the various components on the optical path, so that the optical deflector 56 and the excitation light source 52 are distributed around the wavelength conversion element 34, which can reduce the volume of the light source device 200 to a certain extent.

[0056] In some embodiments, each light source module 50 may further include a condensing lens 54, and the condensing lens 54 and the optical refracting element 56 are sequentially disposed on the optical path of the excitation light. The condensing lens 54 is located between the optical refracting element 56 and the excitation light source 52, so that the excitation light source 52, the condensing lens 54, and the optical refracting element 56 are arranged sequentially in a direction that is approximately parallel to the plane where the wavelength conversion element 34 is located.

[0057] Furthermore, in this embodiment, the condensing lens 54 and the excitation light source 52 in each light source module 50 are located on the same side of the wavelength conversion element 34, and the condensing lens 54 and the optical refractive element 56 in each light source module 50 are located at opposite ends of the wavelength conversion element 34 in the radial direction. As an example, the condensing lens 54 and the optical refractive element 56 are both arranged on the substrate 12, and the straight line they define can be parallel to or coincide with the plane where the wavelength conversion element 34 is located, thereby ensuring that the condensing lens 54 and the optical refractive element 56 are located at opposite ends of the wavelength conversion element 34. In this embodiment, "the condensing lens 54 and the optical refractive element 56 are located at opposite ends of the radial direction of the wavelength conversion element 34" does not mean that the condensing lens 54 and the optical refractive element 56 are distributed in the same radial direction. It is only necessary to restrict them to be arranged approximately along a certain radial direction or around the periphery of that radial direction. For example, the line connecting their geometric centers can be through the perpendicular bisector O1, or it can be spaced apart from the perpendicular bisector O1, so that they are located at opposite ends of the wavelength conversion element 34 without obstructing the excitation surface 3413. Furthermore, in some embodiments, when projected onto the plane where the wavelength conversion element 34 is located, the projected outlines of the optical refractive index 56 and the condenser lens 54 in each light source module 50 are located on both sides of the wavelength conversion element 34, and the projected outlines of the optical refractive index 56 and the condenser lens 54 do not overlap with the projected outline of the wavelength conversion element 34. This embodiment, by setting the condenser lens 54, concentrates the beam of the excitation light source 52 to achieve a smaller light spot, thus allowing the excitation light to illuminate the wavelength conversion element 34 as much as possible, thereby achieving high optical power density or high brightness.

[0058] Furthermore, in this embodiment, the light-emitting side of the excitation light source 52 faces the direction of the perpendicular bisector O1. The condenser lens 54 can be disposed between the excitation light source 52 and the perpendicular bisector O1; for example, the condenser lens 54 can be offset from the perpendicular bisector O1. The condenser lens 54 can be mounted on the substrate 12 by means of a lens holder 55, or it can be glued to the substrate 12; this embodiment does not impose any limitations on this.

[0059] As an example, the condenser lens 54 can be a spherical lens, a hemispherical lens, a spherical plano-convex lens, an aspherical plano-convex lens, a cylindrical lens, etc. It can be positioned with the planar surface of the plano-convex lens facing the laser source, or with its curved surface facing the laser source. The material can be transparent optical glass, plastic, or other transparent materials suitable for optical transmission.

[0060] In each light source module 50, the optical refraction element 56 can be aligned in a straight line with the excitation light source 52 and the condenser lens 54, or the optical refraction element 56 can be slightly offset from the straight line defined by the excitation light source 52 and the condenser lens 54. For example, the excitation light from the excitation light source 52 can be reflected by other reflectors and then propagate to the optical refraction element 56. The optical refraction element 56 has a reflective surface 561 for reflecting light. The reflective surface 561 is a portion of the outer surface of the optical refraction element 56, which can be formed by coating or bonding a reflective material. For example, the surface of the optical refraction element 56 can be coated with a high reflectivity film for blue light (wavelength range of approximately 430nm~470nm) to form the reflective surface 561. As an example, the main material of the optical refraction element 56 can include metals such as aluminum, copper, alloys, etc., and its reflective surface 561 can be formed directly on a designated area of ​​the surface by polishing, or the reflective surface 561 can be formed by plating a high reflectivity material such as mirror silver. As another example, the main material of the light-refracting element 56 may include non-metallic materials such as glass, sapphire, etc. Except for the reflective surface 561, the other surfaces of the light-refracting element 56 are matte surfaces with diffuse reflection of light.

[0061] In some embodiments, the optical refractor 56 is offset from the vertical line O1 of the wavelength converter 34. That is, the vertical line O1 (a virtual line) may not pass through the optical refractor 56 but may be spaced apart from it. By setting the reflective surface 561 of the optical refractor 56 at a suitable angle, the excitation light can be reflected to the wavelength converter 34 without blocking the propagation path of the laser. Since the optical refractor 56, the focusing lens 54, and the excitation light source 52 are all stacked on the substrate 12, and each of them protrudes relative to the first surface 121 of the substrate 12, and the structural thickness of each of them is greater than the structural thickness of the wavelength converter 34, in order for the excitation light to propagate to the wavelength converter 34, the optical refractor 56 may be set close to the edge of the wavelength converter 34, and the reflective surface 561 may face the geometric center of the wavelength converter 34.

[0062] In this embodiment, the reflective surface 561 is a plane, and the angle between the reflective surface 561 and the normal of the wavelength conversion element 34 is an acute angle. Further, the angle between the reflective surface 561 and the normal of the wavelength conversion element 34 is less than or equal to 45 degrees. The portion of the excitation light not absorbed by the wavelength conversion element 34 is reflected, forming unwanted stray light. Considering the complexity of the reflection angle of this stray light, which includes angular diffusion after the light leaves the focal spot and diffuse reflection diffusion of the reflected light after passing through the non-mirror wavelength conversion element 34, the reflection angle generated by the stray light is smaller than the angle of reflection of ordinary light. The angle of incidence b when the excitation light, after being reflected by the reflective surface 561, is incident on the wavelength conversion element 34 is... Figure 5The angle between the incident excitation light and the reflected stray light is set to an appropriate value, which is greater than or equal to 50 degrees. This embodiment can minimize the stray light entering the light-collecting lens, thereby improving the purity of the emitted laser light from the light source device 200 and avoiding excessive light loss. As a specific example, the incident angle b can be 50 degrees, 55 degrees, 60 degrees, 65 degrees, etc.

[0063] In some embodiments of this application, each light source module 50 may further include a diffuser 59, located between the condenser lens 54 and the optical refraction element 56. The diffuser 59 is used to diffuse and homogenize the excitation light, making the light spot distribution formed by the excitation light incident on the wavelength conversion element 34 more uniform, and increasing the focal spot diameter of the minimum light spot. Therefore, the diffuser 59 can also be used to adjust the optical power density of the maximum excitation light obtained by the wavelength conversion element 34. The diffuser 59 may include at least one of a scattering diffuser, a scattering homogenizer, a refractive diffuser, or a phase diffuser. As an example, the diffuser 59 can be attached to the lens holder 55 by adhesive or welding.

[0064] As a specific example, the diffuser 59 may include a random microlens structure. This structure allows the diffuser 59 to achieve the goals of increasing the focal diameter of the minimum light spot and homogenizing the light spot, while simultaneously maintaining the original Gaussian distribution characteristics of the laser beam. As another example, the diffuser 59 may include a phase homogenizer or phase diffuser. Specifically, the phase homogenizer can be a diffractive optical element (DOE). The phase homogenizer, by setting specific phase modulation structures (such as diffraction gratings) on its surface or inside, redistributes the phase of the incident laser beam. Diffusion is achieved through phase modulation and diffraction effects, causing controlled diffraction and interference of the laser beam during propagation, thereby changing the energy distribution of the light spot. Therefore, in this embodiment, by using the diffuser 59, the energy distribution of the excitation light irradiating the surface of the wavelength conversion element 34 is made more uniform, effectively avoiding excessive heat load or thermal damage to the wavelength conversion element 34 caused by local high-intensity areas. This improves the temperature uniformity and operational stability of the light-receiving area of ​​the wavelength conversion element 34, thereby enhancing the reliability and lifespan of the light source device 200 under high-power operating conditions.

[0065] 2n optical refractors 56 are evenly distributed around the circumference of the wavelength conversion element 34. The optical paths of the excitation light from the multiple excited light sources 52 do not overlap, and the excitation light from the multiple excited light sources 52 respectively illuminates the wavelength conversion element 34. Since the 2n light source modules 50 in this embodiment are arranged in the outer peripheral space of the wavelength conversion element 34, this space has a large area for the installation of the light source modules 50. Therefore, this embodiment provides multiple light source modules 50 and distributes the multiple light source modules 50 basically evenly around the wavelength conversion element 34. For example, multiple excitation light sources 52 are evenly distributed (equally spaced) around the outer periphery of the wavelength conversion element 34, or multiple optical refractors 56 are evenly distributed around the outer periphery of the wavelength conversion element 34. The excitation light from the multiple light source modules 50 can be converted, thereby improving the overall power density of the light source device 200 without occupying too much additional space in the accommodating space 141. Therefore, a small volume can be maintained while achieving a high power density. In short, compared to the solution of a single light source module 50, the solution of multiple light source modules 50 utilizes the extra space within the accommodating space 141 for arrangement, without significantly increasing the space occupied. Therefore, under certain volume constraints, the solution of multiple light source modules 50 has relatively high lighting power and can ensure a relatively small volume.

[0066] In the embodiments of this application, the number of light source modules 50 is even, for example, it can be 2, 4, or so on. 2n optical refractive elements 56 are evenly distributed at equal intervals on the outer periphery of the wavelength conversion element 34. The optical path of the excitation light from the excitation light source 52 to the optical refractive element 56 of each light source module 50 is spaced apart from the perpendicular bisector O1 of the wavelength conversion element 34, meaning that this part of the optical path of the excitation light does not pass through the perpendicular bisector O1. In other words, each group of light source modules 50 is eccentrically positioned relative to the wavelength conversion element 34, which is beneficial for symmetrically arranging two light source modules 50 to obtain essentially complementary light spots. The excitation light source 52, the condenser lens 54, and the optical refractive elements 56 can be arranged on the same straight line, which is spaced apart from the perpendicular bisector O1.

[0067] Specifically, please refer to Figure 5 and Figure 6In this embodiment, the optical path of the excitation light in each light source module 50 can be divided into two segments. The optical path from the excitation light source 52 to the optical refractor 56 can be called the outgoing optical path L1, and the optical path from the optical refractor 56 to the wavelength conversion element 34 can be called the reflected optical path L2. When the light source module 50 is projected toward the plane where the wavelength conversion element 34 is located, the projected profile of the outgoing optical path L1 is spaced apart from the perpendicular bisector O1. There is an optical path angle C between the projected profile of the outgoing optical path L1 and the projected profile of the reflected optical path L2. The optical path angle C can be less than 90 degrees. For example, the optical path angle C can be 20, 30, 45, 60 degrees, etc. By controlling a small optical path angle C, the condenser lens 54 and the optical refractor 56 can be arranged more compactly around the wavelength conversion element 34, which is beneficial to realizing a smaller volume light source device 200.

[0068] In this embodiment, the reflective surface 561 is a plane, which may not coincide with any radial direction of the wavelength conversion element 34. This ensures that the optical path (outgoing optical path L1) between the condenser lens 54 and the optical deflector 56 does not cross the perpendicular bisector O1, while the reflective surface 561 can reflect the excitation light to the center position of the wavelength conversion element 34. In the 2n light source modules 50, two light source modules 50 are grouped together, meaning there are n groups of light source modules 50. The two light source modules 50 in each group are symmetrically arranged about the perpendicular bisector O1. For example, in each group of light source modules 50, the two light source modules 50 are arranged symmetrically about the perpendicular bisector O1. The two optical deflectors 56 in the same group of light source modules 50 are located at opposite ends of the same radial direction of the wavelength conversion element 34. The excitation light reflected by these two optical deflectors 56 can be called the first reflected light and the second reflected light. The first reflected light and the second reflected light are respectively incident on the center of the wavelength conversion element 34. The optical paths of the first reflected light and the second reflected light are basically coplanar, so that the light spots formed by the first reflected light and the second reflected light on the wavelength conversion element 34 are basically coincident. Furthermore, the plane defined by the first reflected light and the second reflected light can be basically coplanar with the perpendicular bisector O1, so that the first reflected light and the second reflected light can achieve axial symmetry and / or centrosymmetry about the perpendicular bisector O1. Therefore, the light spots of the two can be combined as comprehensively as possible on the wavelength conversion element 34 to obtain fluorescence with higher power and optical power density.

[0069] In this embodiment, both the first and second reflected light are incident obliquely onto the wavelength conversion element 34, and their incident angles can be greater than or equal to 50 degrees. By setting the first and second reflected light to be incident obliquely rather than perpendicularly and to be basically symmetrical, the light refraction element 56 can be optimally avoided from blocking the light rays received by the laser, thereby improving the output light energy of the light source device 200. Furthermore, since the optical paths of the first and second reflected light are respectively inclined relative to the vertical axis O1, the single light spots formed by them on the wavelength conversion element 34 may have uneven distribution of strong and weak areas and asymmetrical light spot shapes. Therefore, in this embodiment, the optical paths of the first and second reflected light can be symmetrically set about the vertical axis O1. After the single light spot of the first reflected light and the single light spot of the second reflected light are combined, the strong and weak areas of the two light spots can be complementary, the distribution of the combined light spot is relatively uniform, and the shape of the light spot is regular and symmetrical. By setting n light source modules 50, the complementarity of n light spots can be achieved, so that the light spot formed on the wavelength conversion component 34 is closer to a circle and the light spot distribution is more uniform.

[0070] exist Figure 2 In the illustrated embodiment, there are two light source modules 50, which are distributed at 180-degree intervals around the wavelength conversion element 34 and are centrally symmetrical about the vertical axis O1. Figure 7 and Figure 8 In the illustrated embodiment, there are four light source modules 50, which are distributed around the wavelength conversion element 34 at 90-degree intervals. In other embodiments, the number of light source modules 50 may be six, eight, or so on.

[0071] Please see Figure 9 In some embodiments, the light source device 200 may further include an extinction module 60 disposed within the receiving space 141. The extinction module 60 is used to mount the light source module 50 and to reduce stray light in the emitted light generated by the light source module 50.

[0072] Please also refer to Figure 10The extinction module 60 may include an extinction frame 62, which is located in the receiving space 141. The extinction frame 62 has an extinction cavity 6201 opposite to the light-transmitting window 321, and the extinction frame 62 also has an incident channel 6203 communicating with the extinction cavity 6201. The wavelength conversion element 34 is disposed inside the extinction cavity 6201, and the excitation light source 52 is located outside the extinction frame 62. The incident channel 6203 is disposed in the optical path of the excitation light emitted by the excitation light source 52. Therefore, the light emitted by the excitation light source 52 enters the extinction cavity 6201 after passing through the incident channel 6203. The incident channel 6203 can be a through-hole structure, and its aperture can be as small as possible. For example, its aperture can be slightly larger than the beam diameter of the excitation light to facilitate the passage of the excitation light and effectively isolate stray light. In this embodiment, the excitation light source 52 and the wavelength conversion component 34 are isolated by the excitation frame 62, allowing the excitation light to pass through the incident channel 6203. This can filter out stray light around the excitation light at the front end of the excitation light, which is beneficial to control the shape of the light spot, ensures that the edge of the light spot is smooth, and thus improves the quality of the final emitted light.

[0073] Specifically, in this embodiment, the light-extinguishing frame 62 is stacked on the substrate 12 and fixedly connected to the substrate 12. The light-extinguishing frame 62 is generally cylindrical and has a hollow structure, with the light-extinguishing cavity 6201 being the cavity inside. The light-extinguishing frame 62 has a first end 621 and a second end 623 facing away from each other. The first end 621 is stacked on the substrate 12, and the second end 623 is opposite to the light-transmitting window 321. The light-extinguishing cavity 6201 passes through the first end 621 and the second end 623. Specifically, the light-extinguishing cavity 6201 forms a light-extinguishing opening 6211 at the first end 621 and a light-emitting opening 6231 at the second end 623. The light-emitting opening 6231 is directly opposite to the light-transmitting window 321 (and can communicate with it if the light-transmitting window 321 is hollowed out). The light-extinguishing opening 6211 can be sealed by the substrate 12 or other structures. The wavelength conversion element 34 is disposed at the light-extinguishing opening 6211.

[0074] Please see Figure 11The incident channel 6203 penetrates the peripheral wall of the extinction frame 62 to connect the extinction cavity 6201 with the outside. The incident channel 6203 can be a through-hole structure, and its axis can be approximately parallel to the substrate 12, that is, basically parallel to the front optical path (outgoing optical path L1) of the excitation light, so as to facilitate the smooth passage of the excitation light and avoid unnecessary light loss. In this embodiment, the lens support 55 is disposed on the outer peripheral wall of the extinction frame 62 and corresponds to the incident channel 6203. Correspondingly, the outer peripheral wall of the extinction frame 62 is provided with a recessed structure corresponding to the lens support 55, and the lens support 55 is embedded in the recessed structure. This can reliably position the lens support 55 to simplify the assembly process, and can also prevent the lens support 55 from occupying additional radial space, which is beneficial to reducing the overall volume of the light source device 200. Furthermore, the lens holder 55 is roughly hollow frame-shaped, and the condenser lens 54 is embedded in the lens holder 55 and covers the incident channel 6203. Therefore, the excitation light emitted by the excitation source 52 passes through the condenser lens 54 and the incident channel 6203 in sequence and then propagates into the extinction cavity 6201.

[0075] Please also refer to Figure 10 and Figure 11 The optical refracting element 56 is disposed within the extinction cavity 6201 to reflect excitation light. As an example, the inner wall of the extinction frame 62 may have a positioning portion 6205 for fixing the optical refracting element 56. The positioning portion 6205 may be a flange structure, a recessed structure, etc. As an example, the positioning portion 6205 is recessed on the inner wall of the extinction frame 62, used to position and accommodate the optical refracting element 56. The optical refracting element 56 is embedded in the positioning portion 6205, which firstly allows for reliable positioning of the optical refracting element 56, simplifying the assembly process, and secondly avoids the optical refracting element 56 occupying additional radial space, thus reducing the overall volume of the light source device 200. It should be understood that... Figure 10 The cross-section of the matting frame 62 shown is not strictly radial, but rather selected to show the recessed structure of the corresponding lens bracket 55, the positioning part 6205, and the incident channel 6203. The number of recessed structures of the lens bracket 55 should be the same as the number of 2n light source modules 50, the number of positioning parts 6205 should be the same as the number of 2n light source modules 50, and the number of incident channels 6203 should be the same as the number of 2n light source modules 50. The figure is simplified for illustration only and should not be regarded as a limitation of the embodiments of this application. Figure 11 Similarly, simplifications have been made to clearly illustrate the above structure.

[0076] In this embodiment, the extinction module 60 may further include an extinction plate 64, which is disposed at the extinction port 6211 of the extinction frame 62. The extinction plate 64 is used to absorb or reduce stray light at this location, thereby preventing excessive stray light from being reflected by the substrate 12 at the extinction port 6211 and propagating outside the light transmission window 321, thus improving the light output quality to a certain extent.

[0077] As an example, the extinction plate 64 is a complete sheet structure that can cover the entire opening of the extinction port 6211 to absorb as much stray light as possible, while the wavelength conversion element 34 is stacked on the side of the extinction plate 64 facing the extinction cavity 6201.

[0078] As another example, the extinction plate 64 has a ring-shaped structure, which surrounds the outer periphery of the wavelength conversion element 34. Specifically, the extinction plate 64 may have a hollow hole 641, and the wavelength conversion element 34 is disposed within the hollow hole 641. When the extinction plate 64 is stacked on the substrate 12, due to the presence of the hollow hole 641, the wavelength conversion element 34 can also be in close contact with the substrate 12, thereby directly transferring heat to the substrate 12 and improving the heat dissipation efficiency of the wavelength conversion element 34. Furthermore, the wavelength conversion element 34 is disposed within the hollow hole 641, so that the wavelength conversion element 34 and the extinction plate 64 can be substantially coplanar, thereby allowing the wavelength conversion element 34 and the extinction plate 64 to jointly cover the extinction port 6211 to absorb or reduce stray light at this location. Furthermore, the outer periphery of the wavelength conversion element 34 and the wall of the hollow hole 641 can fit tightly together.

[0079] In this embodiment, the surfaces of the extinction frame 62 and the extinction plate 64 facing the extinction cavity 6201 are used to absorb or scatter stray light. Specifically, the surfaces of the extinction frame 62 and the extinction plate 64 facing the extinction cavity 6201 are respectively provided with at least one of the following structures: a diffuse reflection microstructure and an optical extinction layer. By providing the diffuse reflection microstructure and / or the optical extinction layer, the surfaces inside the extinction cavity 6201 can repeatedly diffuse reflect, extinct, or convert stray light that is not absorbed by the wavelength conversion element 34 into the emitted light wavelength, ultimately achieving the purpose of eliminating stray light.

[0080] For example, the surfaces of the extinction frame 62 facing the extinction cavity 6201 and the extinction plate 64 facing the extinction cavity 6201 are both dark-colored surfaces. These dark-colored surfaces can be optical extinction layers. By coating these surfaces with black or dark colors, the optical extinction layer can effectively absorb light, reduce reflection, and prevent stray light from the excitation light that has not been absorbed by the wavelength conversion element 34 from being reflected and emitted through the light transmission window 321. The optical extinction layer can be made of highly absorbent materials, such as carbon black, black ceramic coatings, or black dye coatings, as well as blackening treatments on metal surfaces.

[0081] For example, both the surface of the matting frame 62 facing the matting cavity 6201 and the surface of the matting plate 64 facing the matting cavity 6201 are provided with diffuse reflection microstructures. These diffuse reflection microstructures can include a series of tiny uneven structures arranged on the surfaces of the matting frame 62 and the matting plate 64 to enhance the diffuse reflection capability of the surfaces. Specifically, the microstructures can include micrometer-scale grooves (e.g., grooves formed through surface roughening). The shape, size, and spacing of these structures can be optimized according to specific applications to ensure a relatively uniform diffuse reflection effect on the surfaces of the matting frame 62 and the matting plate 64.

[0082] For example, both the matting frame 62 and the matting sheet 64 are made of light-absorbing materials, such as dark-colored plastics or rubber, to absorb stray light. These light-absorbing materials may include at least one of the following: carbon black, black ceramic, black rubber, black or gray frosted glass, etc.

[0083] Furthermore, in some embodiments, on the light-reflecting element 56 within the extinction cavity 6201, apart from the reflective surface 561, the other surfaces of the light-reflecting element 56 may be provided with at least one of the following structures: a diffuse reflection microstructure and an optical extinction layer, for further absorption of stray light. The diffuse reflection microstructure and optical extinction layer are described above and will not be repeated here. Moreover, the light-reflecting element 56 itself may be a black extinction material, such as optical black glass.

[0084] In some embodiments, the extinction frame 62 has an inner wall 625 facing the extinction cavity 6201, and the inner wall 625 is generally annular. The inner wall 625 may include a first inner surface 6251 and a second inner surface 6253, which are arranged around each other and connected to each other. The spatial structure formed by the first inner surface 6251 and the second inner surface 6253 is the extinction cavity 6201. In this embodiment, the first inner surface 6251 is closer to the substrate 12 than the second inner surface 6253, and the wavelength conversion element 34 is disposed within the space formed by the first inner surface 6251. Specifically, one end of the first inner surface 6251 forms an extinction port 6211, and the other end forms a light receiving port 6252, which is located between the extinction port 6211 and the light emitting port 6231. The diameter of the light-receiving port 6252 is smaller than the diameter of the light-extinguishing port 6211, so that the first inner surface 6251 has a generally "convex" structure relative to the substrate 12, thereby preventing more stray light from escaping. In this embodiment, the first inner surface 6251 has a generally conical structure with a basically smooth and continuous internal connection. The inner diameter of the first surface ring 6251 around the formed space gradually decreases from the light-extinguishing port 6211 to the light-receiving port 6252, thereby absorbing stray light at a small angle.

[0085] Please refer to it again. Figure 9 In some embodiments, the light source device 200 may further include a feedback module 90, which receives a portion of the energy from the excitation light. The feedback module 90 is electrically connected to the controller of the light source device 200 and converts the received energy signal into an electrical signal, which is then transmitted to the controller. The controller is also electrically connected to the excitation light source 52 and controls the power of the excitation light source 52 according to the signal transmitted by the feedback module 90, thereby forming a closed-loop feedback control circuit for the excitation light source 52.

[0086] In this embodiment, the feedback module 90 is disposed on the substrate 12, for example, it can be fixed to the substrate 12 by welding or adhesive bonding. In this embodiment, the energy of the excitation light received by the feedback module 90 can be light energy or heat energy, etc. As an example, the feedback module 90 is used to receive part of the light energy of the excitation light - that is, to receive light rays, and convert the signal of the received excitation light rays into an electrical signal and transmit it to the controller. Therefore, the feedback module 90 can also be located in the optical path of the excitation light of the excitation light source 52 and used to receive the light energy of the excitation light source 52. For example, the feedback module 90 may include a photosensitive sensor 94 and a wire 96. The photosensitive sensor 94 is fixed on the substrate 12, and the wire 96 is connected between the photosensitive sensor 94 and the substrate 12 to be electrically connected to the controller of the light source device 200 through the substrate 12. The wire 96 can be a gold wire, silver wire, or alloy wire, etc. As a specific example, the photosensitive sensor 94 is disposed beside the optical path of the excitation light and is used to receive a small amount of stray light rays around the excitation light beam, which can represent the power of the excitation light to a certain extent. The light sensor 94 converts the light signal into an electrical signal representing the excitation light power and transmits this electrical signal to the controller of the light source device 200. The controller then controls the power of the excitation light source 52 according to this signal, stabilizing the power of the excitation light source 52 within a certain range, thereby ensuring that the final emitted illumination light is relatively stable. The light sensor 94 can be a photosensitive electronic component such as a photodiode or a photoresistor.

[0087] Please see Figure 13 In some embodiments, the light source device 200 may further include a light-collecting module 70, which is disposed on the side of the wavelength conversion element 34 away from the substrate 12, for converging the divergence angle of the fluorescence generated by the wavelength conversion element 34 and propagating it to the outside. Since the laser light (fluorescence) generated by the wavelength conversion element 34 when excited by the excitation light is close to the Lambertian distribution, the light-collecting module 70 in this embodiment can collect as much laser light as possible, improve the light utilization rate, and ensure that the emission angle of the laser light meets the illumination angle requirements of the lighting device 500.

[0088] The light-collecting module 70 may specifically include a light-collecting lens. The light-collecting lens can be implemented using a plano-convex lens. The light-collecting lens is used to reduce the beam angle of the laser beam to 60-70 degrees. As an example, the light-collecting lens can be disposed inside the receiving space 141, for example, installed within the extinction frame 62, to minimize its occupied space in the thickness direction, thus reducing the volume of the light source device 200. As another example, the light-collecting lens can be disposed outside the receiving space 141, for example, located outside the sealing module 30 and fixed to the sealing module 30. In some specific application examples, the light source device 200 may not have the light-collecting module 70, minimizing the volume of a single light source device 200. After delivery, users can install the required light-collecting lens outside the sealing module 30 according to their own needs, which also facilitates reasonable layout and makes the application of the light source device 200 more flexible. In addition, if the light-collecting module 70 is not located in the receiving space 141, or if the light-collecting module 70 is not configured in the entire light source device 200, the glue used to install the light-collecting module 70 can be omitted, thereby avoiding the volatiles of the glue from affecting the performance of the excitation light source 52, and making the performance of the light source device 200 more stable.

[0089] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0090] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A light source device, characterized in that, include: A packaged shell module, the packaged shell module including a substrate and a dam, the dam being disposed on the surface of the substrate and protruding relative to the surface of the substrate, the dam being arranged around the perimeter to define an accommodating space; A wavelength conversion element is disposed in the receiving space and stacked on the substrate; the wavelength conversion element includes an excitation surface and a reflection surface facing away from each other, the reflection surface facing the substrate; The wavelength conversion element has a vertical line; as well as 2n light source modules are arranged in the accommodating space, where n is an integer greater than or equal to 1; each light source module is provided with an excitation light source, and the excitation surface is located in the optical path of the excitation light emitted by the excitation light source; The 2n light source modules are divided into n groups of light source modules, and each group of light source modules includes two light source modules. The two light source modules in each group are distributed on the outer periphery of the wavelength conversion component and are symmetrically arranged about the vertical line.

2. The light source device as described in claim 1, characterized in that, The wavelength conversion component is in direct contact with the substrate, and a heat dissipation component is provided on the side of the substrate away from the receiving space.

3. The light source device as described in claim 2, characterized in that, The wavelength conversion device includes a fluorescent layer and a reflective layer. The excitation surface and the reflective surface are located on opposite sides of the fluorescent layer, respectively. The reflective layer is disposed on the reflective surface and connected to the substrate, and the reflective side of the reflective layer is away from the substrate.

4. The light source device as described in claim 1, characterized in that, Each of the light source modules further includes an optical deflector disposed in the optical path of the excitation light; in each of the light source modules, the optical deflector and the excitation light source are respectively located at the two ends of the radial direction of the wavelength conversion element, and the optical deflector is used to guide the excitation light to the wavelength conversion element.

5. The light source device as described in claim 4, characterized in that, Each of the light source modules further includes a focusing lens. In each light source module, the focusing lens and the excitation light source are located on the same side of the wavelength conversion element, the focusing lens and the optical deflector are located at opposite ends of the wavelength conversion element in the radial direction, and the excitation light source, the focusing lens, and the optical deflector are arranged sequentially along a direction parallel to the plane of the wavelength conversion element.

6. The light source device as described in claim 4, characterized in that, The optical path of the excitation light of each light source module is divided into an outgoing optical path and a reflected optical path. The outgoing optical path is the optical path from the excitation light source to the optical refractor, and the reflected optical path is the optical path from the optical refractor to the wavelength conversion element. The outgoing optical path is spaced apart from the vertical line.

7. The light source device as described in claim 6, characterized in that, When projected toward the plane where the wavelength conversion element is located, the angle between the projected profile of the outgoing light path and the projected profile of the reflected light path is less than -90 degrees.

8. The light source device as described in claim 4, characterized in that, The optical refraction element includes a reflective surface disposed toward the wavelength conversion element, the reflective surface being used to reflect the excitation light to the wavelength conversion element, the incident angle of the excitation light on the wavelength conversion element being greater than or equal to 50 degrees.

9. The light source device according to any one of claims 1 to 8: two light source modules in each group of light source modules are arranged symmetrically about the vertical line, and the excitation light sources in the 2n light source modules are distributed at equal intervals on the outer periphery of the wavelength conversion element; in each group of light source modules, two optical deflectors are respectively located at both ends of the same radial direction of the wavelength conversion element.

10. The light source device according to any one of claims 1 to 8, characterized in that, The light source device further includes an extinction frame located in the accommodating space. The extinction frame has an extinction cavity, and the wavelength conversion element is disposed inside the extinction cavity. The excitation light source is located outside the extinction frame. The extinction frame also has an incident channel communicating with the extinction cavity, and the incident channel is located in the optical path of the excitation light. The surface of the extinction frame facing the extinction cavity has at least one of the following structures: a diffuse reflection microstructure and an optical extinction layer.

11. The light source device according to any one of claims 1 to 8, characterized in that, Each of the light source modules further includes a diffuser, wherein in each light source module: the diffuser is located between the condensing lens and the light refraction element; the diffuser includes at least one of the following diffuser structures: a scattering diffuser, a scattering homogenizing diffuser, a refractive diffuser, or a phase diffuser.

12. A lighting device, characterized in that, include: Circuit board; as well as The light source device according to any one of claims 1 to 111, wherein the substrate of the light source device is connected to the circuit board.

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