CN219198988U

CN219198988U - Light-emitting device and light-emitting system

Info

Publication number: CN219198988U
Application number: CN202223376243.4U
Authority: CN
Inventors: 刘宪; 周建华; 孟硕磊; 余新; 李屹
Original assignee: Appotronics Corp Ltd
Current assignee: Shenzhen Appotronics Corp Ltd
Priority date: 2022-12-14
Filing date: 2022-12-14
Publication date: 2023-06-16
Anticipated expiration: 2032-12-14

Abstract

The application discloses a light emitting device and a light emitting system. The light-emitting device comprises a light-receiving component, a wavelength conversion component and a projection component, wherein the light-receiving component is used for receiving the excitation light and emitting the excitation light along the optical axis direction of the excitation light; the wavelength conversion component is positioned in the optical axis direction and is used for receiving the excitation light and converting the excitation light into the laser with a wavelength range different from that of the excitation light; the projection component is positioned in the direction of the optical axis and arranged on one side of the wavelength conversion component, which is away from the light receiving component, and is used for receiving the laser and adjusting the spot shape of the laser and projecting the laser with the adjusted spot shape. The light receiving component, the wavelength conversion component and the projection component are integrated, so that the light emitting device can be conveniently maintained; simultaneously, the wavelength conversion component and the projection component are both in the direction of the optical axis, the shape of the laser can be adjusted through the projection component, and meanwhile, the size of the light-emitting device can be reduced, and convenience in installation can be improved conveniently.

Description

Light-emitting device and light-emitting system

Technical Field

The present disclosure relates to the field of lighting technologies, and in particular, to a light emitting device and a light emitting system.

Background

At present, some lighting lamps mainly use LED lamps, such as a plurality of luminous columns for decorating the outer wall of a building, generally use LED lamp heads to emit light in cooperation with corresponding luminous columns, and display some patterns by arranging hundreds or thousands of luminous column components on the outer wall to perform special combination.

However, this approach disperses the lamps and the luminous pillars, which has a high failure rate and is inconvenient for maintenance.

Disclosure of Invention

The present disclosure provides a light emitting device and a light emitting system, which aim to solve the above technical problems in the prior art.

To solve the above problems, the present application provides a light emitting device, including: the light receiving component is used for receiving the excitation light and emitting the excitation light along the optical axis direction of the excitation light; a wavelength conversion component is positioned in the optical axis direction, and is used for receiving the excitation light and converting the excitation light into laser light with a wavelength range different from that of the excitation light; the projection component is positioned in the optical axis direction and arranged on one side of the wavelength conversion component, which is away from the light receiving component, and is used for receiving the laser and adjusting the spot shape of the laser and projecting the laser with the adjusted spot shape.

In order to solve the above problems, the present application provides a lighting system, which includes a connection board and a plurality of groups of lighting devices as described above, wherein the plurality of groups of lighting devices are connected to the connection board.

Compared with the prior art, the light emitting device of the present application includes: the light receiving component is used for receiving the excitation light and emitting the excitation light along the optical axis direction of the excitation light; the wavelength conversion component is positioned in the optical axis direction and is used for receiving the excitation light and converting the excitation light into the laser with a wavelength range different from that of the excitation light; the projection component is positioned in the direction of the optical axis and arranged on one side of the wavelength conversion component, which is away from the light receiving component, and is used for receiving the laser and adjusting the spot shape of the laser and projecting the laser with the adjusted spot shape. Through the implementation mode, the light receiving component, the wavelength conversion component and the projection component are integrated, so that the light emitting device is convenient to maintain; simultaneously, the wavelength conversion component and the projection component are both in the direction of the optical axis, the spot shape of the laser can be adjusted through the projection component, and meanwhile, the size of the light-emitting device can be reduced, and convenience in installation can be improved conveniently.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic cross-sectional view of an embodiment of a light emitting device provided herein;

FIG. 2 is a schematic illustration of an embodiment of a first and second stent provided herein;

FIG. 3 is a schematic structural view of an embodiment of a first bracket provided in the present application;

FIG. 4 is a schematic structural view of an embodiment of a second bracket provided herein;

FIG. 5 is a schematic view of a first embodiment of a lighting system provided herein;

fig. 6 is a schematic structural diagram of a second embodiment of a lighting system provided in the present application.

Reference numerals: a light emitting device 10; a light receiving assembly 100; a wavelength conversion component 200; a projection assembly 300; a condensing lens 310; a diffusion sheet 320; a first bracket 400; a conditioning chamber 410; a first fitting hole 420; a second fitting hole 430; a second bracket 500; an adjusting lever 510; a first mounting hole 520; a second mounting hole 530; a press ring 600; a light conduction assembly 700; a light emitting system 2; a connection plate 20; the optical axis direction X.

Detailed Description

Embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first," "second," etc. are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, which means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural sheets" refers to two or more (including two).

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the embodiments of the present application and for simplifying the description, rather than indicating or implying that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

The present application provides a light emitting device, referring to fig. 1, fig. 1 is a schematic sectional view of an embodiment of the light emitting device provided in the present application.

The light emitting device 10 includes a light receiving assembly 100, a wavelength conversion assembly 200, and a projection assembly 300.

The light receiving assembly 100 is configured to receive excitation light and emit the excitation light along an optical axis direction X of the excitation light. The excitation light may be a laser light, may be a monochromatic light, such as blue light, green light, red light or a monochromatic light of other wavelength ranges, or may be a mixed light in which light of at least two wavelength ranges is mixed, such as a mixed light of blue light and red light.

The wavelength conversion component 200 is located in the optical axis direction X, and the wavelength conversion component 200 is configured to receive the excitation light and convert the excitation light into a lasing light having a wavelength range different from that of the excitation light. The wavelength conversion element 200 is transmissive, and when the wavelength conversion element receives excitation light, converts the excitation light into excited light and transmits the excited light out of the wavelength conversion element 200. The wavelength conversion element 200 may convert the excitation light into the laser light completely, or may convert a part of the excitation light into the excited light, and the rest of the excitation light not excited may be emitted from the wavelength conversion element 200 together with the laser light and mixed. The mixed light of the excited light and the unexcited excitation light can be emitted directly, or the unexcited excitation light in the mixed light can be filtered by filtering means, for example, so that only the excited light is emitted. In one embodiment, the wavelength conversion component 200 includes a sapphire substrate and a fluorescent sheet disposed on the sapphire substrate, the fluorescent sheet for receiving excitation light and converting the excitation light into lasing light. The fluorescence piece can cover on the sapphire substrate, and sapphire substrate and fluorescence piece are transmission type, and fluorescence piece can receive the excitation light to through the excitation light excitation fluorescent material, produce the laser. The fluorescent sheet comprises a fluorescent material, and the fluorescent material can be a wavelength conversion material of a blue light section, a green light section, a yellow light section or a red light section. Specifically, the fluorescent material may include fluorescent glass, fluorescent silica gel, fluorescent single crystal, fluorescent ceramic, fluorescent complex phase ceramic, and the like. The substrate of sapphire material can well conduct out the heat generated by the fluorescent sheet during operation.

The projection assembly 300 is disposed on the side of the wavelength conversion assembly 200 away from the light receiving assembly 100 in the optical axis direction X, and the projection assembly 300 is configured to receive the received laser beam and adjust the spot shape of the received laser beam, and project the laser beam with the adjusted spot shape. The projecting component 300 may collect the received laser light, then adjust the shape of the collected laser light, and finally project the laser light with the adjusted shape.

By the above-described embodiments, integrating the light receiving assembly 100, the wavelength conversion assembly 200, and the projection assembly 300 facilitates maintenance of the light emitting device 10; meanwhile, the wavelength conversion component 200 and the projection component 300 are both arranged in the optical axis direction X, the shape of the laser can be adjusted through the projection component 300, and meanwhile, the size of the light-emitting device 10 can be reduced, and convenience in installation can be improved.

In one embodiment, the light emitting device includes a light source assembly (not shown) and a light conduction assembly 700, the light conduction assembly 700 is connected to the light source assembly and the light receiving assembly 100, and the light conduction assembly 700 is used for emitting the excitation light generated by the light source assembly to the light receiving assembly 100 along the optical axis direction X. The light conduction assembly 700 may include an optical fiber, the optical fiber is connected to a light source assembly, the light source assembly may not be integrally disposed with the receiving assembly 100, the wavelength conversion assembly 200 and the projection assembly 300, the light source assembly may be centrally disposed in a protection space, the excitation light generated by the light source assembly is conducted to the light receiving assembly through the light conduction assembly 700, in a practical application scenario, the light source assembly may be built in a building, the receiving assembly 100, the wavelength conversion assembly 200 and the projection assembly 300 may be exposed outside the building, the light source assembly is connected with the light conduction assembly 700, and the generated excitation light is emitted to the light receiving assembly 100 through the light conduction assembly 700, thereby avoiding exposure of related circuits of the light source assembly to the outside, so as to improve the service life of the light source assembly and facilitate maintenance of the light emitting device 10.

In one embodiment, the projection assembly 300 includes a condensing lens 310 and a diffusion sheet 320, the condensing lens 310 is located between the diffusion sheet 320 and the wavelength conversion assembly 200, the condensing lens 310 is used for collecting the laser light, and projecting the laser light to the diffusion sheet 320 after focusing, and the diffusion sheet 320 is used for diffusing the laser light. After the receiving laser light is transmitted from the wavelength conversion module 200, the receiving laser light enters the condensing lens 310, the condensing lens 310 gathers the laser light after collecting the laser light, and emits the gathered laser light to the scattering sheet 320, the scattering sheet 320 adjusts the divergence angle of the receiving laser light after receiving the receiving laser light, and finally the receiving laser light with adjusted shape is projected.

In an embodiment, the scattering angle of the scattering sheet 320 for the laser light in the first direction is different from the scattering angle of the scattering sheet 320 for the laser light in the second direction, wherein the first direction, the second direction and the optical axis direction X are perpendicular to each other. The scattering angle of the scattering sheet 320 may be designed according to the requirements of the spot that is finally projected, e.g. the scattering angle of the scattering sheet 320 for the laser light in the first direction may be the same or different from the scattering angle of the scattering sheet 320 for the laser light in the second direction.

In one embodiment, the distance between the projection assembly 300 and the wavelength conversion assembly 200 in the optical axis direction X is adjustable. In the present embodiment, the projection assembly 300 may be regarded as a whole so that the entire projection assembly 300 is moved closer to or farther from the wavelength conversion assembly 200 in the optical axis direction X in synchronization to obtain a spot size for projecting the laser light onto a specific distance plane. In other embodiments, each component in the projection assembly 300 may independently approach or depart from the wavelength conversion assembly 200 in the optical axis direction X, and illustratively, when the projection assembly 300 includes the condenser lens 310 and the diffusion sheet 320, the condenser lens 310 and the diffusion sheet 320 may independently move back and forth in the optical axis direction X, that is, the space between the condenser lens 310 and the diffusion sheet 320 may be adjustable; or the condensing lens 310 and the diffusion sheet 320 may be regarded as a whole to move synchronously in the optical axis direction X, that is, the interval between the condensing lens 310 and the diffusion sheet 320 is not adjustable.

Referring to fig. 1-4, fig. 2 is a schematic exploded view of an embodiment of a first bracket 400 and a second bracket 500 provided herein; FIG. 3 is a schematic structural view of an embodiment of a first bracket 400 provided in the present application; fig. 4 is a schematic structural diagram of an embodiment of a second bracket 500 provided in the present application.

The light emitting device 10 further includes a first bracket 400 and a second bracket 500 connected to each other, the wavelength conversion assembly 200 is disposed on the first bracket 400, the projection assembly 300 is disposed on the second bracket 500, and the second bracket 500 can rotate around the optical axis direction X relative to the first bracket 400 to adjust the interval between the projection assembly 300 and the wavelength conversion assembly 200. The wavelength conversion component 200 is fixedly arranged with the first bracket 400, the projection component 300 is fixedly arranged with the second bracket 500, and when the distance between the projection component 300 and the wavelength conversion component 200 needs to be adjusted, the distance between the first bracket 400 and the second bracket 500 only needs to be adjusted. The first bracket 400 and the second bracket 500 are rotatably connected, and when the space between the projection assembly 300 and the wavelength conversion assembly 200 needs to be adjusted, the first bracket 400 and/or the second bracket 500 can be rotated, so that the first bracket 400 and the second bracket 500 can relatively move in the optical axis direction X, and the space between the projection assembly 300 and the wavelength conversion assembly 200 can be adjusted.

Specifically, the first bracket 400 is provided with an adjustment cavity 410, and the second bracket 500 is provided with an adjustment rod 510, and the adjustment rod 510 is at least partially positioned in the adjustment cavity 410, so that an inner sidewall of the adjustment cavity 410 and an outer sidewall of the adjustment rod 510 are connected by threads. The inner side wall of the adjusting cavity 410 and the outer side wall of the adjusting rod 510 are both provided with threads, the adjusting cavity 410 and the adjusting rod 510 extend along the optical axis direction X, the adjusting rod 510 and the adjusting cavity 410 can be assembled through the threads, the adjusting rod 510 or the adjusting cavity 410 can rotate around the optical axis direction X with the assistance of the threads, and in the rotating process, the distance between the first bracket 400 and the second bracket 500 in the optical axis direction X is changed, so that the projection assembly 300 and the wavelength conversion assembly 200 are further driven to move, and the distance between the projection assembly 300 and the wavelength conversion assembly 200 is adjusted.

In an embodiment, the second bracket 500 is provided with a first mounting hole 520 and a second mounting hole 530 which extend along the optical axis direction X and are communicated with each other, the first mounting hole 520 is far away from the wavelength conversion component 200 compared to the second mounting hole 530, the first mounting hole 520 is used for accommodating the condensing lens 310 of the projection component 300, and the second mounting hole 530 is used for accommodating the diffusion sheet 320 of the projection component 300. The bottom wall of the first mounting hole 520 is provided with a light inlet hole, the condensing lens 310 can be carried on the bottom wall so that the condensing lens 310 is accommodated in the first mounting hole 520, the radial dimension of the first mounting hole 520 can be smaller than that of the second mounting hole 530 to form a step between the first mounting hole 520 and the second mounting hole 530, and the diffusion sheet 320 can be carried on the step so that the diffusion sheet 320 is accommodated in the second mounting hole 530. The first mounting hole 520 and the second mounting hole 530 are through holes, and the laser light projected from the wavelength conversion assembly 200 is incident on the condensing lens 310 from the light entrance hole, and after being processed by the condensing lens 310, the light beam is incident on the diffusion sheet 320.

In an embodiment, the light emitting device 10 includes a pressing ring 600, where the pressing ring 600 is disposed in the second mounting hole 530 and is located at a side of the diffusion sheet 320 facing away from the condensing lens 310, and the pressing ring 600 is used to fix the diffusion sheet 320. The pressing ring 600 is disposed in a ring shape, and the pressing ring 600 is pressed against the outer circumference of the diffusion sheet 320 to expose the central area of the diffusion sheet 320, so that the diffusion sheet 320 is fixed and the laser is conveniently projected from the diffusion sheet 320.

In an embodiment, the first bracket 400 includes a first fitting hole 420 extending in the optical axis direction X, the first fitting hole 420 being for accommodating the wavelength conversion component 200. The first assembly hole 420 is communicated with the adjustment cavity 410, and a radial dimension of the first assembly hole 420 may be smaller than a radial dimension of the adjustment cavity 410, so that a limiting base is formed between the first assembly hole 420 and the adjustment cavity 410, the limiting base is used for limiting the adjustment rod 510 in the optical axis direction X, and the wavelength conversion component 200 may be carried on a bottom wall of the first assembly hole 420 to accommodate and fix the wavelength conversion component 200 in the first assembly hole 420.

In one embodiment, the first bracket 400 includes a second fitting hole 430 extending in the optical axis direction X, the second fitting hole 430 communicating with the first fitting hole 420, the second fitting hole 430 being distant from the second bracket 500 compared to the first fitting hole 420. The light emitting port of the light receiving assembly 100 is inserted into the second fitting hole 430, the second fitting hole 430 communicates with the first fitting hole 420, and when the light receiving assembly 100 receives and emits the excitation light, the excitation light may enter the second fitting hole 430 along the optical axis direction X to be excited by the wavelength conversion assembly 200 to form a lasing light.

The light emitting device 10 may further include a plurality of heat radiation fins disposed on an outer circumferential wall of the first bracket 400 at intervals around the optical axis direction X so as to perform a heat radiation process on the light emitting device 10 using the heat radiation fins.

In order to solve the above technical problems, the present application further provides a lighting system 2, referring to fig. 5 and 6, and fig. 5 is a schematic structural diagram of a first embodiment of the lighting system 2 provided in the present application; fig. 6 is a schematic structural diagram of a second embodiment of the lighting system 2 provided in the present application.

The lighting system 2 comprises a connection board 20 and a plurality of sets of lighting devices 10 according to any of the embodiments described above, each set of lighting devices 10 being connected to the connection board 20. Thus, a plurality of light emitting devices 10 can be arranged in a concentrated manner without a large-area decentralized arrangement. For example, when the light emitting device 10 is applied outdoors, it may be concentrated at one or more suitable locations outdoors, and then the excitation light is led out to each group of light emitting devices 10 through the optical fiber, thereby avoiding exposing the relevant circuits of the light source assembly outdoors, and thus the lifetime of the light emitting system 2 may be improved while increasing the convenience of maintenance of the light emitting device 10.

The color, color temperature, etc. of the emitted illumination light can be regulated and controlled in the same lighting system 2 by regulating the output power of the laser and the formulation of the fluorescent powder in the wavelength conversion component 200.

Referring to fig. 5, the light emitting system 2 includes a first light emitting device 10 and a second light emitting device 10, and an output power of excitation light of at least one of the first light emitting device 10 and the second light emitting device 10 is adjustable so that a color temperature of a first lasing light projected by the first light emitting device 10 is different from a color temperature of a second lasing light projected by the second light emitting device 10 so as to synthesize the first lasing light and the second lasing light into illumination light with a variable color temperature.

The first light emitting device 10 and the second light emitting device 10 are both the light emitting devices 10 in the above-described embodiments. Wherein the phosphor formulation of the wavelength conversion component 200 of the first light emitting device 10 may be different from the phosphor formulation of the second light emitting device 10 such that one of the first light emitting device 10 and the second light emitting device 10 outputs white light of a high color temperature and the other outputs white light of a low color temperature. Meanwhile, the power of the white light can be controlled by adjusting the power of the excitation light output by the first light emitting device 10 and/or the second light emitting device 10, so that the illumination light with changeable color temperature can be obtained by controlling the light power ratio of the first light emitting device 10 and the second light emitting device 10. Of course, in other embodiments, the wavelength conversion component 200 of the first light emitting device 10 and the wavelength conversion component 200 of the second light emitting device 10 may be the same, and the power of the output white light is controlled only by adjusting the power of the excitation light output by the first light emitting device 10 and/or the second light emitting device 10.

Referring to fig. 6, the light emitting system 2 includes four sets of light emitting devices 10, each set of light emitting devices 10 projecting a different wavelength of laser light so as to combine the laser light projected by each set of light emitting devices 10 into illumination light of a variable color. The phosphor formulations of the wavelength conversion assemblies 200 of the four light emitting devices 10 may be different, so that the colors of the laser light emitted by the four light emitting devices 10 are different, and for example, the laser light emitted by one light emitting device 10 is red light, the laser light emitted by one light emitting device 10 is blue light, the laser light emitted by one light emitting device 10 is green light, and the laser light emitted by one light emitting device 10 is white light. Meanwhile, the power of the excitation light outputted from the four light emitting devices 10 is adjustable so as to combine the excitation light projected from each group of light emitting devices 10 into illumination light of which the color can be arbitrarily changed.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and are intended to be included within the scope of the claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A light emitting device, comprising:

a light receiving component for receiving excitation light and emitting the excitation light along the optical axis direction of the excitation light;

a wavelength conversion component located in the optical axis direction, the wavelength conversion component being configured to receive the excitation light and convert the excitation light into a laser light having a wavelength range different from that of the excitation light;

the projection component is positioned in the optical axis direction and arranged on one side of the wavelength conversion component, which is away from the light receiving component, and is used for receiving the laser and adjusting the spot shape of the laser and projecting the laser with the adjusted spot shape.

2. The light-emitting device according to claim 1, wherein the projection unit includes a condenser lens and a diffusion sheet in the optical axis direction, the condenser lens being located between the diffusion sheet and the wavelength conversion unit, the condenser lens being configured to collect the laser light and project the laser light to the diffusion sheet after focusing, the diffusion sheet being configured to diffuse the laser light.

3. The light-emitting device according to claim 2, wherein a scattering angle of the scattering sheet for the laser light in a first direction is different from a scattering angle of the scattering sheet for the laser light in a second direction, wherein the first direction, the second direction, and the optical axis direction are perpendicular to each other.

4. The light-emitting device according to claim 1, wherein a distance between the projection member and the wavelength conversion member in the optical axis direction is adjustable.

5. The light emitting device of claim 4, further comprising a first bracket and a second bracket coupled to each other, wherein the wavelength conversion component is disposed on the first bracket, wherein the projection component is disposed on the second bracket, and wherein the second bracket is rotatable relative to the first bracket about the optical axis direction to adjust a spacing between the projection component and the wavelength conversion component.

6. The lighting device of claim 5, wherein the first bracket is provided with an adjustment cavity and the second bracket is provided with an adjustment rod, the adjustment rod being at least partially positioned within the adjustment cavity such that an inner sidewall of the adjustment cavity and an outer sidewall of the adjustment rod are threadably coupled.

7. The light-emitting device according to claim 5, wherein the second holder is provided with a first mounting hole and a second mounting hole which extend in the optical axis direction and are communicated with each other, the first mounting hole being distant from the wavelength conversion component compared to the second mounting hole, the first mounting hole being for accommodating a condenser lens of the projection component, and the second mounting hole being for accommodating a diffusion sheet of the projection component.

8. The light-emitting device according to claim 7, wherein the light-emitting device comprises a pressing ring disposed in the second mounting hole and located at a side of the diffusion sheet facing away from the condenser lens for fixing the diffusion sheet.

9. The light-emitting device according to claim 5, wherein the first holder includes a first fitting hole extending in the optical axis direction, the first fitting hole being for accommodating the wavelength conversion component.

10. The light-emitting device according to claim 9, wherein the first holder includes a second fitting hole extending in the optical axis direction, the second fitting hole communicating with the first fitting hole, the second fitting hole being distant from the second holder compared to the first fitting hole; the light outlet of the light receiving assembly is inserted into the second assembly hole.

11. The light-emitting device according to claim 1, wherein the wavelength conversion component comprises a sapphire substrate and a fluorescent sheet disposed on the sapphire substrate, the fluorescent sheet being configured to receive the excitation light and convert the excitation light into the lasing light.

12. The light-emitting device according to any one of claims 1 to 11, wherein the light-emitting device comprises a light source module and a light conduction module, the light conduction module is connected to the light source module and the light receiving module, and the light conduction module is configured to emit excitation light generated by the light source module to the light receiving module along the optical axis direction.

13. A lighting system comprising a connection board and a plurality of sets of lighting devices as claimed in any one of claims 1-12, each set of lighting devices being connected to the connection board.

14. The light emitting system of claim 13, comprising a first light emitting device and a second light emitting device, wherein an output power of excitation light of at least one of the first light emitting device and the second light emitting device is adjustable such that a color temperature of a first lasing light projected by the first light emitting device is different from a color temperature of a second lasing light projected by the second light emitting device so as to synthesize the first lasing light and the second lasing light into an illumination light having a variable color temperature.

15. The lighting system of claim 13, wherein the lighting system comprises four sets of the light emitting devices, each set of the light emitting devices projecting a different wavelength of the laser light so as to combine the laser light projected by each set of the light emitting devices into a variable color illumination light.