Light source module and projection equipment

Abstract

The invention provides a light source module and projection equipment, and the light source module comprises a wavelength conversion device, a first lens assembly, a second lens assembly and a dodging assembly which are sequentially arranged in the direction of a light path. The color filter wheel is arranged between the first lens assembly and the second lens assembly, the reflecting mirror is obliquely arranged between the second lens assembly and the light uniformizing assembly relative to the emergent optical axis, the light source assembly is arranged on one side of the reflecting face of the reflecting mirror, and the wavelength conversion device is used for converting blue light into yellow light; the first lens assembly is a bidirectional convergent lens group; the color filter wheel is rotationally arranged and is provided with a red light reflecting area, a green light reflecting area and a blue light reflecting area which are arranged in the circumferential direction; the second lens assembly is a one-way convergent lens group; the light source assembly is a blue light source assembly. The light source module is simple in structure, the production and assembly efficiency of products can be improved, the production cost is reduced, and miniaturization development is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of light sources, and in particular to a light source module and a projection device. Background Art

[0002] As a lighting module, the light source module is used in many fields, especially the laser light source module, which is often used as a lighting source in projection equipment. In the prior art, some adopt different polarization states of the light beam and combine it with a color filter wheel to achieve the required output light. However, this device requires multiple components such as a beam splitter, a wavelength conversion device, a polarization conversion element, a color filter wheel and multiple lens assemblies to achieve it. Obviously, it requires too many components, and as an optical path design, the more components there are, the more difficult it will be to assemble and debug, affecting production efficiency, and the yield rate will also be affected; at the same time, so many components will also increase the difficulty in structural design and manufacturing, and increase manufacturing costs; in addition, more components also require more space, which is not conducive to the development of products towards miniaturization. Summary of the invention

[0003] Based on the above situation, the main purpose of the present invention is to provide a light source module and a projection device with a simple structure, which can improve the production and assembly efficiency of the product, reduce the production cost, and is conducive to the development of miniaturization.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] A first aspect of the present invention provides a light source module, comprising a wavelength conversion device, a first lens assembly, a color filter wheel, a second lens assembly, a reflector, a light homogenization assembly and a light source assembly.

[0006] The wavelength conversion device is used to convert blue light into yellow light;

[0007] The first lens assembly is a two-way converging lens assembly;

[0008] The color filter wheel is rotatably arranged, and has a red light anti-region, a green light anti-region and a blue light anti-region arranged along the circumference, the red light anti-region transmits blue light and green light, and reflects red light; the green light anti-region transmits blue light and red light, and reflects green light; the blue light anti-region reflects blue light;

[0009] The second lens assembly is a one-way converging lens assembly;

[0010] The light source assembly is a blue light source assembly;

[0011] The wavelength conversion device, the first lens assembly, the second lens assembly and the light homogenizing assembly are arranged in sequence along the optical path direction of the light source module, and the converging side of the second lens assembly is located on the side away from the light homogenizing assembly; the color filter wheel is arranged between the first lens assembly and the second lens assembly, the reflector is arranged between the second lens assembly and the light homogenizing assembly at an angle relative to the output optical axis of the light source module, and its reflecting surface faces the second lens assembly; the light source assembly is arranged on one side of the reflecting surface of the reflector, and the blue light beam emitted by the light source assembly is guided to the color filter wheel via the reflector and the second lens assembly in sequence.

[0012] Optionally, the wavelength conversion device comprises a static ceramic phosphor.

[0013] Optionally, the wavelength conversion device is a fluorescent wheel, and the fluorescent wheel is rotatably arranged.

[0014] Optionally, a diffusion structure is provided in the blue light reflecting area.

[0015] Optionally, the color filter wheel and the diffusion structure are an integrated structure including a color wheel body, and the anti-blue light region is formed by performing anti-blue light treatment and diffusion treatment on the color wheel body.

[0016] Optionally, the diffusion structure is a diffusion sheet; and the diffusion sheet is arranged in the blue light reflecting area.

[0017] Optionally, the wavelength conversion device, the first lens assembly, the second lens assembly and the light homogenizing assembly are coaxially arranged and projected along the direction of the output light axis of the light source module. The reflector is located in the middle area between the second lens assembly and the light homogenizing assembly, and the color filter wheel only partially overlaps with the second lens assembly.

[0018] Optionally, when projected along the direction of the emergent optical axis, a projection area of ​​the reflector is smaller than 1 / 5 of a projection area of ​​the second lens assembly / or a projection area of ​​the light homogenizing assembly.

[0019] Optionally, the reflector reflects blue light and transmits red light and green light.

[0020] Optionally, the reflective surface of the reflector is set at 45° to the emergent optical axis of the light source module; projected along the direction of the emergent optical axis, the light source assembly is located radially outside the second lens assembly, and its emergent main light is perpendicular to the emergent optical axis.

[0021] Optionally, the light source assembly includes a blue laser light source and a light homogenizing device arranged in sequence along the light path direction thereof.

[0022] A second aspect of the present invention provides a projection device, comprising any of the light source modules described above.

[0023] The light source module of the present invention can realize the separate emission of red light, green light and blue light, and set the ratio of red light, green light and blue light as required through the wavelength conversion device that can convert blue light into yellow light, the color filter wheel arranged in different regions, and the cooperation of some converging mirror groups and reflectors. The light source module of the present invention has fewer components, greatly reduces the difficulty of assembly and debugging, improves production efficiency, and greatly improves the yield rate; at the same time, it also reduces the difficulty in structural design and manufacturing, and reduces manufacturing costs; in addition, since the present invention has fewer components, the space requirement is also smaller, which is also conducive to the development of miniaturization of products.

[0024] Other beneficial effects of the present invention will be explained in the specific implementation manner through the introduction of specific technical features and technical solutions. Through the introduction of these technical features and technical solutions, those skilled in the art should be able to understand the beneficial technical effects brought about by the technical features and technical solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

[0026] Figure 1 A schematic structural diagram of a preferred embodiment of the light source module provided by the present invention;

[0027] Figure 2 for Figure 1 In the illustrated embodiment, a schematic diagram of the light path when the color filter wheel rotates until the red light reflecting area is located near the exiting light axis;

[0028] Figure 3 for Figure 1 In the illustrated embodiment, a schematic diagram of the light path when the color filter wheel rotates until the green light reflecting area is located near the exiting light axis;

[0029] Figure 4 for Figure 1 In the illustrated embodiment, a schematic diagram of the light path when the color filter wheel rotates until the blue light reflecting area is located near the emergent light axis.

[0030] In the figure:

[0031] 10. Wavelength conversion device; 20. First lens assembly; 30. Color filter wheel; 31. Red light reflection area; 32. Green light reflection area; 33. Blue light reflection area; 40. Second lens assembly; 50. Reflector; 60. Light homogenization assembly; 70. Light source assembly. DETAILED DESCRIPTION

[0032] The present invention is described below based on embodiments, but the present invention is not limited to these embodiments. In the following detailed description of the present invention, some specific details are described in detail. In order to avoid confusing the essence of the present invention, known methods, processes, procedures, and components are not described in detail.

[0033] In addition, persons of ordinary skill in the art will appreciate that the drawings provided herein are for illustration purposes and are not necessarily drawn to scale.

[0034] Unless the context clearly requires otherwise, throughout the specification and claims, the words "include", "comprising" and similar words should be interpreted in an inclusive sense rather than an exclusive or exhaustive sense; that is, in the sense of "including but not limited to".

[0035] In the description of the present invention, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0036] The present invention provides a light source module that can be used in electronic devices such as projection equipment. Figure 1-Figure 4 As shown, the light source module includes a wavelength conversion device 10 , a first lens assembly 20 , a color filter wheel 30 , a second lens assembly 40 , a reflector 50 , a light homogenization assembly 60 and a light source assembly 70 .

[0037] The wavelength conversion device 10 is used to convert blue light into yellow light.

[0038] The first lens assembly 20 is a two-way converging lens assembly, that is, no matter from which direction the incident light enters the first lens assembly 20 , it has a converging effect on the light, and the outgoing light is all converging light.

[0039] The color filter wheel 30 is rotatably arranged, and has a plurality of reflective filter areas arranged in a circumferential direction, the plurality of reflective filter areas including a red light reflective area 31, a green light reflective area 32, and a blue light reflective area 33. The red light reflective area 31 transmits blue light and green light, and reflects red light; the green light reflective area transmits blue light and red light, and reflects green light; and the blue light reflective area reflects blue light. The color filter wheel 30 is offset relative to the output optical axis of the light source module (i.e., the output optical axis of the light source module hereinafter). Through its rotational movement, only one area is in the optical path at each moment, i.e., only one area among the red light reflective area 31, the green light reflective area 32, and the blue light reflective area 33 is in the optical path of the light source module.

[0040] The second lens assembly 40 is a one-way converging lens group, that is, only one side thereof is a converging side. The two outermost surfaces of the second lens assembly 40 along the optical path direction are the first optical surface and the second optical surface, respectively, and the side where the second optical surface is located is the converging side. Then, when the light beam is incident from the first optical surface and emitted from the second optical surface, the second lens group 40 has a converging effect on the light beam; when the light beam is incident from the second optical surface and emitted from the first optical surface, the second lens group 40 can convert the incident light beam into parallel light.

[0041] The light source assembly 70 is a blue light source assembly, which is used to provide a uniform blue light beam.

[0042] Among them, the wavelength conversion device 10, the first lens assembly 20, the second lens assembly 40 and the light homogenization assembly 60 are arranged in sequence along the optical path direction of the light source module, and the converging side of the second lens assembly 40 is located on the side away from the light homogenization assembly 60, that is, the second lens assembly 40 has a converging effect on the side close to the color filter wheel 30. The color filter wheel 30 is arranged between the first lens assembly 20 and the second lens assembly 40, and is offset relative to the direction of the optical path so that only one area is in the optical path at each moment through its rotation. The reflector 50 is tilted relative to the output optical axis of the light source module and is arranged between the second lens assembly 40 and the light homogenization assembly 60, and its reflection surface faces the second lens assembly 40. The light source assembly 70 is arranged on one side of the reflection surface of the reflector 40, and the blue light beam emitted by the light source assembly 70 is guided to the color filter wheel 30 through the reflector 50 and the second lens assembly 40 in sequence, that is, the blue light beam is converged to the color filter wheel 30 through the action of the second lens assembly 40.

[0043] When the red light reflecting area 31 is located in the light path, as Figure 2 As shown, after the blue light beam emitted by the second lens assembly 40 passes through the anti-red light area 31, it is irradiated to the wavelength conversion device 10 under the guidance of the first lens assembly 20, and is converted into a yellow light beam under the action of the wavelength conversion device 10, and is irradiated toward the first lens assembly 20, and is guided to the anti-red light area 31 of the color filter wheel 30 through the first lens group 20, and emits a green light beam after passing through the anti-red light area 31, that is, only the green light beam is emitted toward the second lens assembly 40 after being filtered by the anti-red light area 31, and the green light beam reaches the light homogenizing assembly 60 through the guidance of the second lens assembly 40, and is emitted from the other side of the light homogenizing assembly 70 through the light homogenizing action, that is, the light source module emits a green light beam.

[0044] When the green light reflecting area 32 is located in the light path, as Figure 3As shown, after the blue light beam emitted by the second lens assembly 40 passes through the green light reflecting area 32, it is irradiated to the wavelength conversion device 10 under the guidance of the first lens assembly 20, and is converted into a yellow light beam under the action of the wavelength conversion device 10, and is irradiated toward the first lens assembly 20, and is guided to the green light reflecting area 32 of the color filter wheel 30 through the first lens group 20, and emits a red light beam after passing through the green light reflecting area 32, that is, only the red light beam is emitted toward the second lens assembly 40 after being filtered by the green light reflecting area 32, and the red light beam reaches the light homogenizing assembly 60 through the guidance of the second lens assembly 40, and is emitted from the other side of the light homogenizing assembly 70 through the light homogenizing action of the light homogenizing assembly 70, that is, the light source module emits a red light beam.

[0045] When the blue light reflecting area 33 is located in the light path, as Figure 4 As shown, the blue light beam emitted by the second lens assembly 40 is reflected back when it hits the anti-blue light area 33, and hits the second lens assembly 40. It reaches the light homogenizing assembly 60 through the guidance of the second lens assembly 40, and is homogenized by the light homogenizing assembly 70 to emit a blue light beam on the other side of the light homogenizing assembly 70, that is, the light source module emits a blue light beam.

[0046] The position of each reflective filter area can be achieved by controlling the rotation of the color filter wheel 30. Figures 2 to 4 In FIG. 1 , the dotted line shows the optical path of the light beam emitted from the light source assembly 70 to the color filter wheel 30 and the wavelength conversion device 10 , and the solid line shows the optical path of the light beam after being reflected by the color filter wheel 30 or the wavelength conversion device 10 .

[0047] The light source module of the present invention can realize the separate emission of red light, green light and blue light, and can set different proportions of red light, green light and blue light as needed through the wavelength conversion device 10 that can convert blue light into yellow light, the color filter wheel 30 set in different regions, and the cooperation of some converging mirror groups and reflectors. The light source module of the present invention has fewer components, greatly reduces the difficulty of assembly and debugging, improves production efficiency, and greatly improves the yield rate; at the same time, it also reduces the difficulty in structural design and manufacturing, and reduces manufacturing costs; in addition, since the present invention has fewer components, the space requirement is also smaller, which is also conducive to the development of miniaturization of products.

[0048] Specifically, the wavelength conversion device 10 is a fluorescent sheet, including a substrate, on which fluorescent powder is arranged. When a blue light beam is irradiated onto the fluorescent sheet, the fluorescent powder is excited and emits a yellow light beam.

[0049] In one embodiment, the wavelength conversion device 10 may be a static ceramic fluorescent sheet, that is, the entire wavelength conversion device does not rotate relative to the direction of the light path, that is, is relatively fixed, and is also fixed relative to the substrate when it includes a substrate.

[0050] In another embodiment, the wavelength conversion device 10 is a fluorescent wheel, which is rotatably arranged, that is, the wavelength conversion device 10, i.e., the fluorescent sheet, is rotatably arranged relative to the light path direction, and its rotation axis can be set to the light path direction, of course, it can also be other positions, as long as it can receive the blue light beam transmitted along the incident direction of the first lens assembly 20, and can reflect the excited yellow light beam to the first lens assembly 20. With this dynamic fluorescent sheet structure, the heat on the fluorescent sheet and the light source module can be quickly conducted away through the rotation of the fluorescent sheet, thereby improving the heat dissipation effect of the entire light source module and improving the stability of the light source module.

[0051] In order to make the outgoing light beam more uniform, the present invention provides a diffusion structure at the anti-blue light region 33 to diffuse the outgoing light beam.

[0052] In a preferred embodiment, the color filter wheel 30 and the diffusion structure are the same optical element, and the anti-blue light region 33 is multiplexed as a diffusion structure. The anti-blue light region 33 is formed by performing anti-blue light processing and diffusion processing on the color wheel body. In the anti-blue light region 33 of the color filter wheel 30, both the reflection of blue light and the diffusion of the light beam can be achieved. That is to say, the blue light beam reflected by the anti-blue light region 33 is also diffused, thereby making the light beam emitted from the uniform light component 60 more uniform. Specifically, the color filter wheel 30 includes a color wheel body, and the anti-blue light region 33 is formed by performing a diffusion treatment on the color wheel body in addition to the anti-blue light treatment, that is, the portion of the color wheel body corresponding to the anti-blue light region 33 is subjected to anti-blue light and diffusion treatment, wherein an anti-blue light layer is formed on the color wheel body after the anti-blue light treatment, and a diffusion layer is formed after the diffusion treatment, wherein the diffusion layer is on the surface, that is, the anti-blue light region 33 includes the color wheel body, the anti-blue light layer and the diffusion layer arranged in sequence, so that the blue light beam converged by the second converging lens group first passes through the diffusion layer before reaching the anti-blue light layer, and the reflected blue light beam can pass through the diffusion layer again, so that the diffusion effect on the blue light is increased and the speckle effect of the blue light is eliminated. Correspondingly, the anti-red light region 31 can be formed by performing an anti-red light treatment on the portion of the color wheel body corresponding to the anti-red light region 31, and the anti-green light region 32 can be formed by performing an anti-green light treatment on the portion of the color wheel body corresponding to the anti-green light region 32. The use of this integrated structure can reduce the number of optical components in the light source module, reduce the difficulty of assembly and processing, and more importantly, reduce energy loss in the light path, thereby improving the visual effect of projection when used in projection equipment.

[0053] In another embodiment, the diffusion structure and the color filter wheel 30 are different optical elements. Specifically, the diffusion structure is a diffusion sheet. The color filter wheel 30 includes a color wheel body. The red light reflecting area 31, the green light reflecting area 32 and the blue light reflecting area 33 are arranged on the color wheel body along the circumferential direction. The diffusion element is arranged on the blue light reflecting area 33, specifically, it can be located on the side of the color wheel body facing the second lens group 40. In this way, the diffusion structure can be specially processed according to different situations.

[0054] Regardless of which of the above embodiments the color filter wheel 30 and the diffusion structure adopt, the color filter wheel 30 may include a color wheel body, which may be a transparent optical substrate, and different reflective filtering areas are formed by coating and other technologies.

[0055] Optionally, the color filter wheel 30 may be a circular structure, wherein a connecting portion is provided in the middle region thereof, the connecting portion may be located in the middle region of the color filter wheel 30, the color filter wheel 30 may be rotatably connected to the base through the connecting portion, the red light emitting region, the green light reflecting region 32 and the blue light reflecting region 33 may each be an annular sector structure, and are sequentially arranged along the circumference of the color wheel body, and two adjacent regions may be close to each other or may be arranged at intervals. Preferably, the rotation axis of the color filter wheel 30 is parallel to the exit light axis, so that a light beam of a larger area is incident on the color filter wheel 30 in a direction perpendicular to the color wheel body.

[0056] In one embodiment, the wavelength conversion device 10, the first lens assembly 20, the second lens assembly 40 and the light homogenizing assembly 60 are coaxially arranged, that is, the optical axes of the wavelength conversion device 10, the first lens assembly 20, the second lens assembly 40 and the light homogenizing assembly 60 are collinear with the output optical axis of the entire light source module. The rotation axis of the color filter wheel 30 is offset relative to the output optical axis, and preferably its rotation axis is parallel to the output optical axis, so that by controlling the rotation of the color filter wheel 30, the required reflective filter area is located in the optical path in different time periods, and other reflective filter areas are located outside the optical path, so as to make the best use of each light beam emitted by the light source assembly 70.

[0057] Further preferably, the color filter wheel 30 is arranged near the focus of the second lens assembly 30, and the parallel light beam emitted by the light source assembly 70 can be converged at the color filter wheel 30 as much as possible after passing through the reflector 50 and the second lens assembly 40, so as to increase the light irradiated into the wavelength conversion device 10, thereby improving the luminous effect of the entire light source module.

[0058] In one embodiment, the reflector 50 reflects blue light, green light, and red light. In a preferred embodiment of the present invention, the reflector 50 reflects blue light and transmits red light and green light. In this way, the red light beam and the green light beam emitted by the color filter wheel 30 can enter the light homogenizing device 70 even after being irradiated by the reflector 50. This can maximize the utilization rate of the light source component, because the yellow light excited by the wavelength conversion device 10 has already lost part of the light beam when it passes through the color filter wheel 30 to obtain the red light beam and the green light beam. If a certain amount of occlusion is caused between the second lens component 40 and the light homogenizing component 70, the energy loss caused is too large. The present invention can make full use of the filtered red light beam and the green light beam by setting a reflector 50 that transmits red light and green light, thereby increasing the light source utilization rate of the light source module.

[0059] In one embodiment, the reflective surface of the reflector 50 is set at 45° to the output optical axis of the light source device. When projected along the output optical axis of the light source module, the light source assembly 70 is located radially outside the second lens assembly 40, and its output main light is perpendicular to the output optical axis. In this way, the parallel light emitted by the light source assembly 70 is reflected by the reflector 50, and then incident on the first optical surface of the second lens assembly 40 in a direction parallel to the optical axis of the second lens assembly 40, and then after being emitted from the second optical surface of the second lens assembly 40, it can be converged to the color filter wheel 30.

[0060] In another embodiment, the wavelength conversion device 10, the first lens assembly 20, the second lens assembly 40 and the light homogenization assembly 70 are coaxially arranged, and the projection along the exit optical axis (ie Figure 1The reflector 50 is located in the middle area of ​​the second lens assembly 40 and the light homogenizing assembly 60, that is, the reflector 50 is basically located in the middle area of ​​the projection relative to the second lens assembly 40, and is also located in the middle area of ​​the projection relative to the light homogenizing assembly 60, and the color filter wheel 30 and the second lens assembly 40 only partially overlap. That is to say, in the optical path parallel to the exit optical axis, the reflector 50 only occupies a part of the optical path cross section. In this way, the blue light beam emitted by the light source assembly 70 basically only occupies the middle part of the optical path during the transmission process from the reflector 50 to the wavelength conversion device 10 through the second lens assembly 40, the color filter wheel 30, the first lens assembly 20, and the wavelength conversion device 10. In the transmission process from the wavelength conversion device 10 to the uniform light assembly 60 through the first lens assembly 20, the color filter wheel 30, the second lens assembly 40, the larger part of the optical path is basically occupied. In particular, in the embodiment where the reflector 50 transmits red light and green light, the green light beam and the red light beam emitted from the second lens assembly 40 to the uniform light assembly 70 can be basically fully utilized. In this way, using the least optical elements and a compact structural arrangement, it is possible to realize red, green, blue and different color beams formed by the combination of these three colors in different proportions, thereby making the manufacture and assembly of the entire light source module more convenient, reducing costs, and increasing the utilization rate of the light source assembly. Further preferably, the projection along the direction of the exit optical axis (i.e. Figure 1 The projection area of ​​the reflector 50 is less than or equal to 1 / 5 of the projection area of ​​the second lens assembly 40 and / or the light homogenizing assembly 60, such as 1 / 5, 1 / 10 or 1 / 12 of the projection area of ​​the second lens assembly 40. Preferably, the projection area of ​​the reflector 50 is much smaller than 1 / 10 of the projection area of ​​the second lens assembly 40 and / or the light homogenizing assembly 60 to further enhance the intensity and capability of the light emitted by the light source module.

[0061] The light source assembly 70 may be a blue light source assembly, specifically a laser light source assembly. In one embodiment, the light source assembly 70 includes a blue laser light source and a light homogenizing device sequentially arranged along the light path direction thereof, the blue laser light source is used to provide a blue laser light beam, and the blue light beam emitted by the entire light source assembly 70 after passing through the light homogenizing device is more uniform, that is, as parallel light as possible, so as to improve the utilization rate of the light beam by the entire light source module.

[0062] The light homogenizing assembly 60 and the light homogenizing device in the above-mentioned embodiments may be light homogenizing components such as a fly-eye lens and a light homogenizing rod.

[0063] The present invention also provides a projection device, comprising a light source module of any of the above embodiments. The projection device also includes a modulation module and a projection lens, and the light beam emitted by the light source module enters the projection lens after being modulated by the modulation module, thereby realizing projection. Among them, the modulation module may include a plurality of optical lenses and a digital micromirror device (i.e., a DMD device), so as to modulate the light beam of the light source module through the action of the plurality of optical lenses and the digital micromirror device. Of course, the modulation module may also be other modules in the prior art, which will not be described in detail here.

[0064] Those skilled in the art will appreciate that, without conflict, the above-mentioned preferred solutions can be freely combined and superimposed.

[0065] It should be understood that the above-mentioned embodiments are merely illustrative and not restrictive. Without departing from the basic principles of the present invention, various obvious or equivalent modifications or substitutions that can be made by those skilled in the art to the above-mentioned details will all be included in the scope of the claims of the present invention.

Claims

1. A light source module, characterized in that: The invention comprises a wavelength conversion device, a first lens assembly, a color filter wheel, a second lens assembly, a reflector, a light homogenization assembly and a light source assembly. The wavelength conversion device is used to convert blue light into yellow light; The first lens assembly is a two-way converging lens assembly; The color filter wheel is rotatably arranged, and has a red light anti-region, a green light anti-region and a blue light anti-region arranged along the circumference, the red light anti-region transmits blue light and green light, and reflects red light; the green light anti-region transmits blue light and red light, and reflects green light; the blue light anti-region reflects blue light; The second lens assembly is a one-way converging lens assembly; The light source assembly is a blue light source assembly; The wavelength conversion device, the first lens assembly, the second lens assembly and the light homogenizing assembly are arranged in sequence along the optical path direction of the light source module, and the converging side of the second lens assembly is located on the side away from the light homogenizing assembly; the color filter wheel is arranged between the first lens assembly and the second lens assembly, the reflector is arranged between the second lens assembly and the light homogenizing assembly at an angle relative to the output optical axis of the light source module, and its reflecting surface faces the second lens assembly; the light source assembly is arranged on one side of the reflecting surface of the reflector, and the blue light beam emitted by the light source assembly is guided to the color filter wheel via the reflector and the second lens assembly in sequence.

2. The light source module according to claim 1, characterized in that: The wavelength conversion device includes a static ceramic phosphor.

3. The light source module according to claim 1, characterized in that: The wavelength conversion device is a fluorescent wheel, and the fluorescent wheel is rotatably arranged.

4. The light source module according to claim 1, characterized in that: A diffusion structure is arranged in the blue light reflecting area.

5. The light source module according to claim 4, characterized in that: The color filter wheel and the diffusion structure are an integrated structure, including a color wheel body, and the anti-blue light area is formed by performing anti-blue light processing and diffusion processing on the color wheel body.

6. The light source module according to claim 4, characterized in that: The diffusion structure is a diffusion sheet; the diffusion sheet is arranged in the blue light reflecting area.

7. The light source module according to claim 1, characterized in that: The wavelength conversion device, the first lens assembly, the second lens assembly and the light homogenizing assembly are coaxially arranged and projected along the direction of the output light axis of the light source module. The reflector is located in the middle area between the second lens assembly and the light homogenizing assembly, and the color filter wheel only partially overlaps with the second lens assembly.

8. The light source module according to claim 7, characterized in that: Projected along the direction of the output optical axis, the projection area of ​​the reflector is smaller than 1 / 5 of the projection area of ​​the second lens assembly / or the projection area of ​​the light homogenizing assembly.

9. The light source module according to claim 1, characterized in that: The reflector reflects blue light and transmits red light and green light.

10. The light source module according to claim 1, characterized in that: The reflective surface of the reflector is set at 45° with the emergent optical axis of the light source module; projected along the direction of the emergent optical axis, the light source assembly is located radially outside the second lens assembly, and its emergent chief light is perpendicular to the emergent optical axis.

11. The light source module according to any one of claims 1 to 10, characterized in that: The light source assembly comprises a blue laser light source and a light homogenizing device which are sequentially arranged along the light path direction.

12. A projection device, characterized in that: The light source module comprises the light source module according to any one of claims 1 to 11.

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