Laser light source device and lighting system

Abstract

The laser light source device (10) and the lighting system include a housing (11) having an opening (112) and a wavelength conversion assembly (12), the wavelength conversion assembly (12) covers or fits over the opening (112) to close the opening (112) and form an airtight space with the housing (10), at least one laser (13) is installed in the airtight space and is used to generate laser light, and the laser light is projected onto the wavelength conversion assembly (112) to generate output light, thereby improving the utilization rate of the laser light source.

Description

Technical Field

[0001] This application belongs to the field of optical technology, and specifically relates to a laser light source device and a lighting system.

Background Art

[0002] In a general laser light source device, a laser and a wavelength conversion assembly are integrated and packaged inside one housing, which has the advantages of small size and convenience in use. However, due to the size limitation of the laser light source device, the emitted light generated by the wavelength conversion assembly exciting the laser light cannot be fully utilized, resulting in a waste of resources.

Summary of the Invention

Problems to be Solved by the Invention

[0003] In view of the above problems, this application provides a laser light source device that can improve the utilization rate of the laser light source.

Means for Solving the Problems

[0004] To solve the above problems, this application provides a laser light source device including a housing with an opening, a wavelength conversion assembly covered or fitted in the opening to block the opening and form an airtight space with the housing, and at least one laser installed in the airtight space, used to generate laser light and for the laser light to be projected onto the wavelength conversion assembly to generate emitted light.

[0005] Preferably, the wavelength conversion assembly includes a transparent heat sink and a wavelength conversion member, and the transparent heat sink and the wavelength conversion member are installed in sequence along the optical path of the laser light.

[0006] Preferably, the wavelength conversion assembly includes an anti-reflective coating or a dichroic coating, the anti-reflective coating being installed on the side of the transparent heat sink facing the wavelength conversion member, and the dichroic coating being installed between the transparent heat sink and the wavelength conversion member.

[0007] Preferably, the laser light source device includes a reflective assembly, which is installed in an airtight space and located in the optical path of the laser beam, and the laser beam is projected onto the wavelength conversion assembly via the reflective assembly.

[0008] Preferably, the laser light source device includes a diffusion sheet, which is installed in the airtight space and located between the reflection assembly and the wavelength conversion assembly.

[0009] Preferably, the laser light source device includes a focusing element, which is installed in an airtight space and located in the optical path of the laser beam, in order to reduce the divergence angle of the laser beam.

[0010] Preferably, the housing includes a base, at least one laser is mounted on the base, and an opening is provided on the side of the housing facing the base.

[0011] Preferably, the laser light source device includes a laser heat sink, which is installed in an airtight space, and at least one laser is fixed to a base via the laser heat sink, and the laser is installed parallel, inclined, or perpendicular to the base.

[0012] Preferably, the laser light source device includes a heat conductive member, which is in thermal contact with the wavelength conversion assembly.

[0013] Preferably, the heat conductive members are in thermal contact with the wavelength conversion assembly and the base, respectively.

[0014] Preferably, the laser light source device has at least two lasers installed in an airtight space, and the light spots projected onto the wavelength conversion assembly by the laser light generated by the at least two lasers overlap at least partially. [Effects of the Invention]

[0015] To solve the above problems, this application provides a lighting system including the above-mentioned laser light source device.

[0016] The beneficial effects of this invention are as follows: Unlike the prior art, in this invention, an opening is provided in the housing of the laser light source device, and a wavelength conversion assembly is fitted into the opening to close the opening. This allows the wavelength conversion assembly to excite the laser light projected by the laser onto the housing and generate fluorescence. Furthermore, the surface of the wavelength conversion assembly that excites fluorescence can be directly used as the emission surface of the emitted light. This allows all of the fluorescence excited by the wavelength conversion assembly to be emitted as emitted light, improving the utilization rate of fluorescence. In addition, there is no need to install the wavelength conversion assembly inside the housing, and the wavelength conversion assembly can be used as part of sealing the housing, further reducing the size of the laser light source device and lowering costs. Moreover, since the wavelength conversion assembly is fitted into the opening and forms a sealed space with the housing, it does not affect the airtightness of the laser light source device, thus ensuring the reliability of the laser light source device. [Brief explanation of the drawing]

[0017] [Figure 1] This is a schematic side-view cross-sectional view of the first embodiment of the laser light source device of the present application. [Figure 2] This is a schematic side-view cross-sectional view of a second embodiment relating to the laser light source device of the present application. [Figure 3] This is a schematic side-view cross-sectional view of a third embodiment relating to the laser light source device of the present application. [Figure 4] This is a schematic side-view cross-sectional view of the fourth embodiment of the laser light source device of the present application. [Figure 5]It is a schematic side view cross-sectional diagram of the fifth embodiment of the laser light source device of the present application. [Figure 6] It is a schematic side view cross-sectional diagram of the sixth embodiment of the laser light source device of the present application. [Figure 7] It is a schematic side view cross-sectional diagram of the seventh embodiment of the laser light source device of the present application. [Figure 8] It is a schematic side view cross-sectional diagram of the eighth embodiment of the laser light source device of the present application. [Figure 9] It is a schematic side view cross-sectional diagram of the ninth embodiment of the laser light source device of the present application. [Figure 10] It is a schematic side view cross-sectional diagram of the tenth embodiment of the laser light source device of the present application. [Figure 11] It is a schematic side view cross-sectional diagram of the eleventh embodiment of the laser light source device of the present application. [Figure 12] It is a schematic side view cross-sectional diagram of the twelfth embodiment of the laser light source device of the present application. [Figure 13] It is a schematic side view cross-sectional diagram of the thirteenth embodiment of the laser light source device of the present application. [Figure 14] It is a schematic side view cross-sectional diagram of the fourteenth embodiment of the laser light source device of the present application. [Figure 15] It is a schematic side view cross-sectional diagram of the fifteenth embodiment of the laser light source device of the present application.

Modes for Carrying Out the Invention

[0018] The following clearly and completely describes the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. As is clear, the described embodiments are only some of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by those skilled in the art on the premise of not making creative efforts based on the embodiments in the present application shall fall within the protection scope of the present application. The "first" and "second" described in the present application do not represent order but only serve a directive function. The "and / or" described in the present application is only used to explain the relationship of related objects, and there may be three relationships, indicating that it does not limit the relationship.

[0019] Through long-term research, the inventors have found that in laser light source devices, the wavelength conversion component of the laser light source device is generally installed inside the housing. While this installation allows for a more compact overall structure of the laser light source device, the distance from the light emission surface of the light source device to the wavelength conversion component (e.g., a fluorescent sheet) is large. As a result, the emitted light already has a large divergence angle before it is projected onto the light emission surface. Furthermore, due to the limitations of the size of the light emission surface, only a portion of the light is emitted through the light emission surface, further reducing the utilization rate of the emitted light.

[0020] In view of the above issues, the present invention proposes the following embodiments.

[0021] Referring to Figure 1, Figure 1 is a schematic side-view cross-sectional view of a first embodiment of the laser light source device of the present application. As shown in Figure 1, in this embodiment, the laser light source device 10 includes a housing 11, a wavelength conversion assembly 12, and a laser 13.

[0022] Specifically, in this embodiment, an opening 112 is provided in the housing 11, and the wavelength conversion assembly 12 is covered or fitted into the opening 112, thereby closing the opening 112 and forming an airtight space with the housing 11. The laser 13 is installed in the airtight space and is used to generate laser light, and the laser light is projected onto the wavelength conversion assembly 12 to generate emitted light.

[0023] Specifically, the wavelength conversion assembly 12 includes a transparent heat sink 121 and a wavelength conversion member 122, and the transparent heat sink 121 and the wavelength conversion member 122 are installed sequentially along the optical path of the laser light.

[0024] In this embodiment, the laser light generated by the laser 13 can be projected onto the transparent heat sink 121, and the thickness of the transparent heat sink 121 is not limited here. The transparent heat sink 121 and the wavelength conversion member 122 are installed in order along the optical path of the laser light, and the laser light projected onto the transparent heat sink 121 passes through the transparent heat sink 121 and is projected onto the wavelength conversion member 122, and the wavelength conversion member 122 can further convert the wavelength of the projected laser light to generate output light.

[0025] Specifically, in this embodiment, the wavelength conversion member 122 may be a fluorescent powder layer coated on the transparent heat sink 121, or a fluorescent sheet covering the transparent heat sink 121, and is not limited thereto.

[0026] Here, the transparent heat sink 121 can transmit the laser beam, and its material can be flexibly installed as needed, for example, sapphire material, which has high thermal conductivity and can improve the heat dissipation rate.

[0027] Specifically, the wavelength conversion assembly 12 includes an anti-reflective coating or a dichroic coating (not shown). The anti-reflective coating may be installed on the side of the transparent heat sink 121 away from the wavelength conversion member 122, and the dichroic coating may be installed between the transparent heat sink 121 and the wavelength conversion member 122.

[0028] For example, an anti-reflective coating that transmits the laser beam may be installed on the surface of the transparent heat sink 121 facing the laser 13, or a dichroic coating may be installed between the transparent heat sink 121 and the wavelength conversion member 122. Both the anti-reflective coating and the dichroic coating can transmit laser light and reflect fluorescence, thereby further increasing the conversion rate of the laser light.

[0029] Specifically, the housing 11 includes a base 111, the laser 13 is mounted on the base 111, and an opening 112 is provided on the side of the housing 11 facing the base 111.

[0030] Specifically, in this embodiment, the size of the opening 112 may be set to be equal to the size of the area surrounded by the side wall of the housing 11, the wavelength conversion assembly 12 can be covered by the opening 112 and fixedly sealed to the side wall of the housing 11, the wavelength conversion assembly 12 and the base 111 form two opposing side walls of the housing 11, and the wavelength conversion assembly 12 and the housing 11 may be hermetically sealed by a sealing material to protect the long-term reliable operation of the laser chip, the sealing material may be glass, solder, adhesive, gold tin, or other materials.

[0031] Specifically, as shown in Figure 1, the sealing material may be installed as a thin layer at the interface between the wavelength conversion assembly 12 and the housing 11, completely covering the interface between the wavelength conversion assembly 12 and the housing 11, or partially covering the interface between the wavelength conversion assembly 12 and the housing 11. A filling groove (not shown) may be installed in the side wall of the housing 11 or the wavelength conversion assembly 12 corresponding to the interface, and the sealing material can be filled into the filling groove. When the wavelength conversion assembly 12 and the housing 11 come into contact, the sealing material in the filling groove can create an airtight connection between the wavelength conversion assembly 12 and the housing 11.

[0032] Furthermore, in the above application scenarios, the installation of the sealing material does not affect the contact of the interface between the wavelength conversion assembly 12 and the housing 11, and in other application scenarios, the formation of an airtight space between the wavelength conversion assembly 12 and the housing 11 by the sealing material is not limited to the above configuration.

[0033] Specifically, referring to Figure 2, Figure 2 is a schematic side-view cross-sectional view of a second embodiment of the laser light source device of the present application. As shown in Figure 2, in the laser light source device 20 of this embodiment, the installation of the wavelength conversion assembly 22, housing 21 and laser 23 may be the same as in the first embodiment, and the explanation is omitted here. Unlike the first embodiment, the sealing material applied to the hermetically sealed connection between the wavelength conversion assembly 22 and the housing 21 in this embodiment is thick and laid on the contact surface between the wavelength conversion assembly 22 and the housing 21. The specific thickness and sealing material are not limited here. Specifically, in this embodiment, the wavelength conversion assembly 22 and the housing 21 may be installed so as to achieve an hermetically sealed connection by sealing material rather than by direct contact, and the specific technical effects are the same as in the previous embodiment, and the explanation is omitted here.

[0034] Furthermore, in some specific application scenarios, the wavelength conversion assembly may be fitted into an aperture and fixedly sealed to the side wall of the housing. Referring to Figure 3, Figure 3 is a schematic side-view cross-sectional view of a third embodiment relating to the laser light source device of the present application.

[0035] As shown in Figure 3, in the laser light source device 30, by adjusting the size of the wavelength conversion assembly 32, contact between the wavelength conversion assembly 32 and the surface of the side wall of the housing 31 facing the airtight space can be achieved, and an airtight connection between the wavelength conversion assembly 32 and the housing 31 can be achieved by the airtight connection method in the first embodiment.

[0036] Specifically, in several concrete application scenarios, a step may be created in the side wall perpendicular to the base 311 to form a stepped opening 312, and the wavelength conversion assembly 32 may be installed in the stepped groove formed by the step; one side of the wavelength conversion assembly 32 facing the base 311 may be installed in contact with the side wall of the housing 31 to form an airtight space with the housing 31; the side of the wavelength conversion assembly 32 perpendicular to the base 311 may be installed in contact with the side wall of the housing 31; and the bottom and side surfaces of the wavelength conversion assembly 32 may be installed in contact with the side wall simultaneously.

[0037] Specifically, an airtight material may be installed between the bottom surface of the wavelength conversion assembly 32 and the side wall of the housing 31, or between the side surface of the wavelength conversion assembly 32 and the side wall of the housing 31, or between the bottom surface and side surface of the wavelength conversion assembly 32 and the side wall of the housing 31, and can be flexibly adjusted according to the specific application scene, and is not limited thereto.

[0038] In this embodiment, the other installations of the laser 33 and the wavelength conversion assembly 32 may be the same as in the above embodiment, and will not be described here.

[0039] Furthermore, in some specific applications, the housing may include a cover plate and a base, which are the two opposing side walls of the housing, and the opening may be provided in the cover plate. Referring to Figure 4, which is a schematic side-view cross-sectional view of a fourth embodiment relating to the laser light source device of the present application. As shown in Figure 4, in the laser light source device 40 of this embodiment, the housing 41 includes a base 411 and a cover plate 413, which are installed on two opposing sides of the housing 41, an opening 412 is provided in the cover plate 413, and a wavelength conversion assembly 42 is covered or fitted into the opening 412 to seal the housing 41, forming an airtight housing space capable of accommodating a laser 43 and a reflection assembly 44.

[0040] In this embodiment, the cover plate 413 may be a metal cover plate, and the metal cover plate and the housing 41 may be directly sealed by welding, for example, by a parallel sealing welding process, a resistance welding process, a laser welding process, or the like.

[0041] Here, the installation of the laser 43 may be the same as in any of the embodiments described above, and therefore the explanation is omitted here.

[0042] In some embodiments, the laser light source device may include a reflective assembly, which is installed in an airtight space and located in the optical path of the laser beam, and the laser beam is projected onto a wavelength conversion assembly via the reflective assembly.

[0043] Taking the fourth embodiment as an example, the reflective surface of the reflection assembly 44 may be positioned so as to face the laser beam output end of the laser 43, thereby allowing the laser beam emitted from the laser 43 to be projected onto the reflective surface of the reflection assembly 44. Alternatively, the laser 43 and the aperture 412 may be installed on opposite sides of the housing 41, and both the laser 43 and the reflection assembly 44 may be fixed to the base 411. The laser beam generated by the laser 43 is projected onto the reflective surface of the reflection assembly 44, and the direction of emission of the laser beam reflected through the reflective surface is toward the aperture 412 on the opposite side of the base 411. Furthermore, the reflected laser beam is projected onto the wavelength conversion assembly 42, thereby enabling further conversion of the laser beam's wavelength.

[0044] Furthermore, the vertical projection of the aperture 412 onto the base 411 may be positioned to cover the reflection assembly 44, thereby allowing more of the laser light reflected by the reflection assembly 44 to be collected by the wavelength conversion assembly 42, further improving the laser light conversion efficiency and reducing wasted laser light resources.

[0045] The reflective assembly 44 may specifically be a reflective plane mirror, a total reflection prism, or a lens plated with a high-reflection metal surface, or it may be another type of reflective element, and its shape may be the triangle shown in the figure, or other shapes may be provided as needed.

[0046] Specifically, referring to Figure 5, Figure 5 is a schematic side-view cross-sectional view of a fifth embodiment relating to the laser light source device of the present application.

[0047] As shown in Figure 5, in this embodiment, the reflection assembly 54 may be a lens with integrated reflectors, the surface of the reflection assembly 54 closest to the laser 53 may be set as a spherical or cylindrical surface to reduce the divergence angle of the laser beam, and the surface for reflecting the laser light is an inclined surface used to reflect the laser beam to the wavelength conversion assembly 52.

[0048] Here, other installations in this embodiment may be the same as those in any one of Examples 1 to 4, and will not be described here.

[0049] Furthermore, referring to Figure 6, Figure 6 is a schematic side-view cross-sectional view of a sixth embodiment relating to the laser light source device of the present application.

[0050] As shown in Figure 6, in this embodiment, the reflection assembly 64 may be set up as a concave mirror, where the reflective surface for reflecting the laser light is concave, thereby converging the divergence angle of the laser beam and reflecting the laser light to the wavelength conversion assembly 62. Here, the reflective concave surface may be a sphere, aspherical surface, cylindrical surface, parabolic concave surface, etc., and is not limited thereto.

[0051] Here, other installations in this embodiment may be the same as those in any one of Examples 1 to 4, and will not be described here.

[0052] Furthermore, referring to Figure 7, Figure 7 is a schematic side-view cross-sectional view of the seventh embodiment relating to the laser light source device of the present application.

[0053] As shown in Figure 7, in this embodiment, the reflection assembly 74 may be set up as a single light guide, and an oblique reflective surface may be set up at the end of the light guide. The light beam generated by the laser 73 is coupled to the light guide, reflected multiple times within the light guide, and then reflected at the end of the light guide before being emitted to the wavelength conversion assembly 72.

[0054] Here, the light guide may be a rectangular light guide, a circular light guide, or an optical fiber. After the laser beam is reflected multiple times and propagates within the light guide, the laser beam is homogenized, which results in a uniform light intensity distribution of the laser spot incident on the wavelength conversion assembly 72, thus avoiding the problem of fluorescence quenching.

[0055] Here, other installations in this embodiment may be the same as those in any one of Examples 1 to 4, and will not be described here.

[0056] In some specific application examples, the laser light source device includes a laser heatsink, which is installed in an airtight space, and at least one laser is fixed to a base via the laser heatsink, and the laser is installed parallel, inclined, or perpendicular to the base.

[0057] Furthermore, referring to Figure 8, which is a schematic side-view cross-sectional view of an eighth embodiment relating to the laser light source device of the present application. As shown in Figure 8, in this embodiment, the laser light source device 80 further includes a laser heat sink 85, the laser heat sink 85 is installed in an airtight space, and at least one laser 83 is fixed to a base via the laser heat sink 85.

[0058] In this embodiment, the installation of the wavelength conversion assembly 82, housing 81, and reflection assembly 84 may be the same as in any one of the above embodiments, and the explanation will be omitted here.

[0059] Specifically, in this embodiment, the laser heat sink 85 is installed between the laser 83 and the base 811 and is fixedly connected to the base 811. The laser 83 may also be fixedly installed on the side of the laser heat sink 85 that is away from the base 811. The heat generated by the laser 83 is conducted to the base 811 via the laser heat sink 85 and released to the outside of the housing 81 via the base 811, thereby improving the heat dissipation performance of the laser light source device 80. Furthermore, the laser 83 is installed parallel to the base 811, that is, the light generated by the laser 83 is parallel to the base 811.

[0060] In some specific application examples, the laser light source device includes a diffusion sheet, which is installed in an airtight space and positioned between the reflective assembly and the wavelength conversion assembly. Furthermore, to ensure the diffusion effect of the diffusion sheet, the vertical projection of the diffusion sheet on its base may cover the reflective assembly, and in other specific application examples, the vertical projection of the diffusion sheet on its base may not, and is not limited thereto, cover the reflective assembly completely.

[0061] Referring to Figure 9, Figure 9 is a schematic side-view cross-sectional view of the ninth embodiment relating to the laser light source device of the present application.

[0062] In this embodiment, the installation of the housing 91, wavelength conversion assembly 92, laser 93, and reflection assembly 94 in the laser light source device 90 may be the same as in any of the embodiments described above, and is not limited thereto.

[0063] Specifically, in this embodiment, a diffusion sheet 96 is placed in front of the wavelength conversion assembly 92 and the reflection assembly 94, and the diffusion sheet 96 is positioned so that its vertical projection on the base 911 covers the reflection assembly 94. The diffusion sheet 96 is used to enlarge the laser light spot, and the diffusion sheet 96 may be elliptic Gaussian or circular Gaussian, and the diffusion sheet 96 may be positioned diagonally to change the shape of the light spot.

[0064] In some specific application examples, the laser light generated by the laser in the laser light source device can be projected directly onto the wavelength conversion assembly without being reflected and converted into output light. Referring to Figure 10, Figure 10 is a schematic side-view cross-sectional view of the 10th embodiment of the laser light source device of the present application.

[0065] As shown in Figure 10, in this embodiment, the laser light generated by the laser 103 in the laser light source device 100 can be projected directly onto the wavelength conversion assembly 102. Specifically, the laser heat sink 105 may be installed so as to be fixed to the base 1011, and the laser 103 may be installed on the surface of the laser heat sink 105 away from the base 1011. More specifically, the surface of the laser heat sink 105 away from the base 1011 may be installed as an inclined surface, that is, the laser 103 may be installed at an angle to the base 1011, and the laser light emitting end of the laser 73 fixed to the inclined surface may be pointed in the direction opposite to the base 1011, and the laser light generated by the laser 103 can be projected directly onto the wavelength conversion assembly 102 to form the emitted light.

[0066] In this embodiment, the installation of the housing 101 and the wavelength conversion assembly 102 may be the same as in any of the embodiments described above, and therefore will not be explained here.

[0067] Furthermore, referring to Figure 11, Figure 11 is a schematic side-view cross-sectional view of the 11th embodiment of the laser light source device of the present application. As shown in Figure 11, in this embodiment, the laser light source device 200 may be installed such that the laser heat sink 205 is fixed to the base 2011, the laser 203 may be fixed to the side surface of the laser heat sink 205 perpendicular to the base 2011, or the laser 203 may be installed such that it is fitted into the laser heat sink 205 in a direction perpendicular to the base 2011, so that the laser light emitting end of the laser 203 faces the wavelength conversion assembly 202, that is, the laser 203 is installed perpendicular to the base 2011, and the laser light it generates can be projected directly onto the wavelength conversion assembly 202 to form emitted light.

[0068] In this embodiment, the installation of the housing 201 and the wavelength conversion assembly 202 may be the same as in any of the embodiments described above, and therefore will not be explained here.

[0069] In some specific application examples, the laser light source device may include a focusing element, which may be installed in an airtight space and located in the optical path of the laser beam, and may be installed to reduce the divergence angle of the laser beam.

[0070] Referring to Figure 12, which is a schematic side-view cross-sectional view of a twelfth embodiment relating to the laser light source device of the present application, as shown in Figure 12, the laser light source device 300 further includes a focusing element 307, which may be installed at the laser light output end of the laser 303. The laser light generated by the laser 303 is first projected onto the focusing element 307, which can reduce the divergence angle of the laser light. The laser light transmitted through the focusing element 307 is projected onto the wavelength conversion assembly 302 to form the output light.

[0071] Here, the focusing element 307 may be a focusing lens, a cylindrical mirror, etc., and by adjusting the divergence angle of the laser beam with the focusing element 307, an emitted light spot of the target shape and size can be obtained. The specific selection of the focusing element 307 can be flexibly set according to the needs of the emitted light spot and is not limited here.

[0072] In this embodiment, the installation of the wavelength conversion assembly 302, housing 301, laser heat sink 305, and laser 303 may be the same as in any of the embodiments described above, and will not be explained here. In addition to the installation method of the focusing element 307 shown in this embodiment, the focusing element 307 may be installed at other positions in the optical path from the generation of laser light by the laser 303 to projection onto the wavelength conversion assembly 302. Furthermore, in addition to this embodiment, other embodiments of the present application may also include the installation of the focusing element 307.

[0073] In some specific application examples, the laser light source device includes a heat conductive member, the heat conductive member is in thermal contact with the wavelength conversion assembly, the heat conductive member is installed in an airtight space and is in contact with the wavelength conversion assembly and the base, and the heat conductive member is installed outside the optical path of the laser light.

[0074] Referring to Figure 13, Figure 13 is a schematic side-view cross-sectional view of the 13th embodiment of the laser light source device of the present application.

[0075] As shown in Figure 13, in this embodiment, the laser light source device 400 includes a heat conductive member 408, and the heat conductive member 408 contacts both opposing surfaces of the wavelength conversion assembly 402 and the base 4011 in an airtight space. By conducting heat generated from the wavelength conversion assembly 402 to the base 4011 via the heat conductive member 408, the heat generated from the wavelength conversion assembly 402 can be conducted to the outside via the base 4011, thus preventing the overall temperature of the laser light source device 400 from becoming too high and affecting its reliability. Furthermore, since the heat conductive member 408 is installed outside the optical path of the laser light, it does not obstruct the optical path through which the laser light is projected onto the wavelength conversion assembly 402.

[0076] Here, the installation of the laser 403, housing 401, and wavelength conversion assembly 402 may be the same as in any of the embodiments described above, and will not be explained here.

[0077] Furthermore, in some specific application installations, the heat conduction members may be installed so as to be in thermal contact with the wavelength conversion assembly and the base, respectively, and a heat dissipation block may be installed on the laser light source device, and the heat dissipation block may be installed on the light emission surface and outside the optical path of the emitted light.

[0078] Referring to Figure 14, Figure 14 is a schematic side-view cross-sectional view of the 14th embodiment relating to the laser light source device of the present application.

[0079] As shown in Figure 14, in this embodiment, the laser light source device 500 may have at least one heat dissipation block 509, and at least one heat dissipation block 509 is installed on a surface away from the base 5011 of the wavelength conversion assembly 502 and does not obstruct the optical path of the emitted light, so as not to affect the emitted light spot. The housing 501 may further have a projection 5013 that connects the heat dissipation block 509 and the base 5011. Specifically, the heat generated by the wavelength conversion assembly 502 can be conducted to the base 5011 via the heat dissipation block 509 and the projection 5013, and furthermore, it is possible to prevent the temperature of the wavelength conversion assembly 502 from becoming too high and affecting its reliability.

[0080] In this embodiment, the installation of the laser 503, the reflection assembly 504, etc., may be the same as in any of the embodiments described above, and will not be explained here.

[0081] Furthermore, at least two lasers are installed within the airtight space of the laser light source device, and the light spots projected onto the wavelength conversion assembly by the laser light generated by the at least two lasers overlap at least partially. Referring to Figure 15, Figure 15 is a schematic side-view cross-sectional view of the 15th embodiment of the laser light source device of the present application.

[0082] As shown in Figure 15, in this embodiment, there may be two lasers 603, and the reflection assembly 604 may be configured to include two reflective surfaces or two reflective elements, the two reflective surfaces or two reflective elements corresponding one-to-one with the two lasers 603, and the laser light generated by the corresponding lasers 603 can be reflected by the wavelength conversion assembly 602 to form the emitted light.

[0083] In some specific application examples, laser light generated by multiple lasers 603 is reflected by a reflection assembly 604 and then projected onto a wavelength conversion assembly 602. When laser light generated by different lasers 603 is projected corresponding to the wavelength conversion assembly 602, the different light spots corresponding to the different lasers 603 may overlap, partially overlap, or not overlap at all. By combining the required emitted light spot shapes according to the actual application needs, the flexibility of the application scenarios for the laser light source device 600 can be increased.

[0084] Here, the installation of the housing 601 and the wavelength conversion assembly 602 may be the same as in any of the embodiments described above, and will not be explained here.

[0085] Furthermore, in any of the above embodiments, at least one laser electrode (not shown) is connected to a housing electrode (not shown).

[0086] The external interface of the housing electrode and the laser heat conduction external interface may be located on a single plane, where the external interface of the housing electrode may be located on the side of the housing, and there are two types of sides, one of which may be SMD and the other of which may have two pins drawn out, but are not limited thereto.

[0087] Based on the above, the present invention allows the fluorescence converted by the wavelength conversion assembly to be directly emitted by installing the wavelength conversion assembly in the housing, eliminating the need for transmission through the housing, reducing the reflection of emitted light, and increasing the utilization rate of the laser light source. Furthermore, the present invention increases the reliability of the laser light source device by arranging the wavelength conversion assembly and the housing together to form an airtight space, and by installing the wavelength conversion assembly outside the airtight space, the volume of the airtight space can be reduced, increasing the compactness of the overall structure of the laser light source device.

[0088] Furthermore, in several specific application examples, the present application provides a lighting system including at least one laser light source device of any of the above embodiments. The lighting system is used for everyday lighting or projection, and is not limited to projectors, stage lights, car lights, flashlights, searchlights, etc.

[0089] The above describes only the embodiments of the present application and does not limit the scope of the patent. Equivalent structures or equivalent flow transformations performed using the specifications and drawings of the present application, or their direct or indirect application to other related technical fields, are all similarly included within the scope of the patent protection of the present application.

Claims

1. A laser light source device, A housing with an opening, A wavelength conversion assembly that covers or fits into the opening and closes the opening to form an airtight space with the housing, Installed within the aforementioned airtight space and used to generate laser light, the laser light is projected onto the wavelength conversion assembly to generate output light, and includes at least one laser. A reflective assembly installed in the aforementioned airtight space, A diffusion sheet is installed within the airtight space and located between the reflection assembly and the wavelength conversion assembly, The laser light source device is characterized in that the diffusion sheet does not come into contact with either the wavelength conversion assembly or the reflection assembly.

2. The laser light source device according to claim 1, wherein the wavelength conversion assembly includes a transparent heat sink and a wavelength conversion member, and the transparent heat sink and the wavelength conversion member are arranged in order along the optical path of the laser light.

3. The laser light source device according to claim 2, wherein the wavelength conversion assembly includes an anti-reflective film or a dichroic film, the anti-reflective film being installed on the side of the transparent heat sink away from the wavelength conversion member, and the dichroic film being installed between the transparent heat sink and the wavelength conversion member.

4. The laser light source device according to claim 1, characterized in that the reflection assembly is located on the optical path of the laser light, and the laser light is projected onto the wavelength conversion assembly via the reflection assembly.

5. The reflective assembly is located in the optical path of the laser beam and is used to change the direction of propagation of the laser beam so that the laser beam is directed toward the wavelength conversion assembly. The laser light source device according to claim 1, characterized in that the diffusion sheet is used to diffuse the laser light from the reflection assembly.

6. The laser light source device according to claim 1, wherein the laser light source device includes a focusing element, the focusing element is installed in the airtight space and located in the optical path of the laser light, and is used to reduce the divergence angle of the laser light.

7. The laser light source device according to claim 1, characterized in that the housing includes a base, the at least one laser is mounted on the base, and the opening is provided on a side of the housing facing the base.

8. The laser light source device according to claim 7, wherein the laser heat sink is installed in the airtight space, and at least one laser is fixed to the base via the laser heat sink, and the laser is installed parallel to the base.

9. The laser light source device according to claim 1, wherein the laser light source device includes a heat conductive member, and the heat conductive member is in thermal contact with the wavelength conversion assembly.

10. The laser light source device according to claim 9, characterized in that the heat conductive member is in thermal contact with the wavelength conversion assembly and the base, respectively.

11. The laser light source device according to claim 1, wherein at least two lasers are installed in the airtight space, and the light spots projected onto the wavelength conversion assembly by the laser light generated by the at least two lasers overlap at least partially.

12. A lighting system characterized by including at least one laser light source device according to any one of claims 1 to 11.

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