Wavelength conversion element, illumination system, and projection device

Abstract

The invention provides a wavelength conversion element which is suitable for rotating around a rotating shaft. The wavelength conversion element includes a rotating member and a wavelength conversion material. The wavelength conversion material is disposed on the rotating member. The wavelength conversion material is used for converting the laser beam into a conversion beam. The rotating member is used for driving the wavelength conversion material to rotate around the rotating shaft. The wavelength conversion element has a light-transmitting region. The light passing area is formed by surrounding of the rotating piece. The light passing area is used for allowing at least one of the laser beam and the conversion beam to pass through. According to the wavelength conversion element, the illumination system and the projection device provided by the invention, the internal space application of the wavelength conversion element can be improved, so that the sizes of the illumination system and the projection device are reduced.

Description

Technical Field

[0001] The present invention relates to an optical element, an optical system and an electronic device, and in particular to a wavelength conversion element, an illumination system and a projection device. Background Art

[0002] A projection device is a display device used to produce large-size images. With the evolution and innovation of science and technology, it has been continuously improving. The imaging principle of a projection device is to convert the illumination beam generated by the illumination system into an image beam through a light valve, and then project the image beam through a projection lens onto a projection target (e.g., a screen or a wall) to form a projection image.

[0003] The fluorescent color wheel is one of the commonly used components in the projection device. The fluorescent color wheel is driven by the motor at the center of the turntable, and the turntable can be coated with fluorescent powder. When the section of the fluorescent powder is rotated to the transmission path of the light beam, the light beam excites the fluorescent powder to produce the color light corresponding to the fluorescent powder. However, the motor of the fluorescent color wheel occupies a certain volume, so there is still room for improvement in the future development of miniaturization. How to develop an optical architecture that saves volume is one of the development goals of this field.

[0004] The "background technology" section is only used to help understand the content of the present invention. Therefore, the content disclosed in the "background technology" section may contain some prior art that is not known to those skilled in the art. The content disclosed in the "background technology" section does not mean that the content or the problem to be solved by one or more embodiments of the present invention has been known or recognized by those skilled in the art before the application of the present invention. Summary of the invention

[0005] The invention provides a wavelength conversion element, an illumination system and a projection device, which can improve the internal space utilization of the wavelength conversion element.

[0006] Other purposes and advantages of the present invention can be further understood from the technical features disclosed in the present invention.

[0007] To achieve one or part or all of the above purposes or other purposes, the present invention provides a wavelength conversion element, which is suitable for rotating around a rotation axis. The wavelength conversion element includes a rotating member and a wavelength conversion material. The wavelength conversion material is arranged on the rotating member. The wavelength conversion material is used to convert a laser beam into a conversion beam. The rotating member is used to drive the wavelength conversion material to rotate around the rotation axis. The wavelength conversion element has a light-transmitting area. The light-transmitting area is surrounded by the rotating member. The light-transmitting area is used to allow at least one of the laser beam and the conversion beam to pass through.

[0008] To achieve one or part or all of the above purposes or other purposes, the present invention provides an illumination system, which includes a light source module, a semi-transmissive and semi-reflective element, a wavelength conversion element and a first spectroscopic element. The light source module is used to provide a laser beam. The laser beam includes a first part and a second part. The semi-transmissive and semi-reflective element is arranged on the transmission path of the laser beam, allowing one of the first part and the second part to penetrate and reflect the other. The wavelength conversion element is arranged on the transmission path of the second part of the laser beam. The wavelength conversion element is suitable for rotating around a rotation axis. The wavelength conversion element includes a rotating member and a wavelength conversion material. The wavelength conversion material is arranged on the rotating member. The wavelength conversion material is used to convert the laser beam into a conversion beam. The rotating member is used to drive the wavelength conversion material to rotate around the rotation axis. The wavelength conversion element has a light-transmitting area. The light-transmitting area is surrounded by the rotating member. The light-transmitting area is used to allow at least one of the laser beam and the conversion beam to penetrate. The first spectroscopic element is arranged on the transmission path of the laser beam and the conversion beam, allowing one of the laser beam and the conversion beam to penetrate and reflect the other. The illumination beam includes at least one of a first portion of the laser beam and a conversion beam.

[0009] To achieve one or part or all of the above purposes or other purposes, the present invention provides a projection device, which includes an illumination system, at least one light valve and a projection lens. The illumination system is used to provide an illumination beam. The illumination system includes a light source module, a semi-transmissive and semi-reflective element, a wavelength conversion element and a first beam splitter. The light source module is used to provide a laser beam. The laser beam includes a first part and a second part. The semi-transmissive and semi-reflective element is arranged on the transmission path of the laser beam, allowing one of the first part and the second part to penetrate and reflect the other. The wavelength conversion element is arranged on the transmission path of the second part of the laser beam. The wavelength conversion element is suitable for rotating around a rotation axis. The wavelength conversion element includes a rotating member and a wavelength conversion material. The wavelength conversion material is arranged on the rotating member. The wavelength conversion material is used to convert the laser beam into a conversion beam. The rotating member is used to drive the wavelength conversion material to rotate around the rotation axis. The wavelength conversion element has a light-transmitting area. The light-transmitting area is surrounded by the rotating member. The light-transmitting area is used to allow at least one of the laser beam and the conversion beam to penetrate. The first beam splitter is disposed on the transmission path of the conversion beam to allow one of the laser beam and the conversion beam to penetrate and reflect the other. The illumination beam includes the first portion of the laser beam and at least one of the conversion beam. At least one light valve is disposed on the transmission path of the illumination beam to convert the illumination beam into an image beam. The projection lens is disposed on the transmission path of the image beam to project the image beam out of the projection device.

[0010] Based on the above, the embodiments of the present invention have at least one of the following advantages or effects. In the wavelength conversion element, the lighting system and the projection device of the present invention, the wavelength conversion element includes a rotating part and a wavelength conversion material. The wavelength conversion element has a light-transmitting area, which is surrounded by the rotating part, and the light-transmitting area is used to allow at least one of the laser beam and the converted beam to pass through. In this way, in addition to the wavelength conversion effect of the light beam, the light-transmitting area of ​​the wavelength conversion element can be arranged on the transmission path of the light beam in the optical design framework, thereby improving the internal space utilization of the wavelength conversion element.

[0011] In order to make the above features and advantages of the present invention more clearly understood, embodiments are given below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figures 1A to 1C They are schematic diagrams of the wavelength conversion element according to the first embodiment of the present invention from different viewing angles.

[0013] FIG. 2A to FIG. 2C They are schematic diagrams from different viewing angles of a wavelength conversion element according to a second embodiment of the present invention.

[0014] Figure 3 FIG. 4 is a schematic diagram of a wavelength conversion element according to a third embodiment of the present invention.

[0015] Figure 4 FIG. 4 is a schematic diagram of a projection device according to an embodiment of the present invention.

[0016] Figure 5 FIG. 1 is a schematic diagram of a lighting system according to a first embodiment of the present invention.

[0017] Figure 6 is a schematic diagram of a lighting system according to a second embodiment of the present invention.

[0018] Figure 7 is a schematic diagram of a lighting system according to a third embodiment of the present invention.

[0019] Reference numerals list

[0020] 10: Projection device

[0021] 60: Light valve

[0022] 70: Projection lens

[0023] 100,100A,100B: Wavelength conversion element

[0024] 110: Rotating parts

[0025] 112: Magnetic structure

[0026] 120: Wavelength conversion material

[0027] 130:Fixer

[0028] 132: Coil structure

[0029] 140: Bearing structure

[0030] 200,200A,200B: Lighting system

[0031] 210: Light source module

[0032] 220: Semi-transmissive and semi-reflective element

[0033] 230: first light splitting element

[0034] 240: Light homogenization element

[0035] 250: Optical lens

[0036] 260: Second beam splitter

[0037] A: Shaft

[0038] B: Light-transmitting area

[0039] C1: First side

[0040] C2: Second side

[0041] D: Locking hole

[0042] E: Annular groove

[0043] L1: Laser beam

[0044] L11: Part 1

[0045] L12: Part 2

[0046] L2: Transformation beam

[0047] LB: Lighting beam

[0048] LI: Image beam. DETAILED DESCRIPTION

[0049] The above and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the drawings. The directional terms (e.g., up, down, left, right, front or back, etc.) mentioned in the following embodiments are only referenced to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate and not to limit the present invention.

[0050] Figures 1A to 1C They are schematic diagrams of the wavelength conversion element according to the first embodiment of the present invention from different viewing angles. Figure 1C For along Figure 1B Please refer to the cross-sectional diagram of the I-I' line. Figures 1A to 1C . The present embodiment provides a wavelength conversion element (fluorescent color wheel) 100, which is suitable for rotating around a rotation axis A. The wavelength conversion element 100 includes a rotating member 110 and a wavelength conversion material 120. The wavelength conversion material 120 is disposed on the rotating member 110, and the wavelength conversion material 120 is used to convert a laser beam into a converted beam of a different wavelength. In the present embodiment, the wavelength conversion material 120 is, for example, a yellow fluorescent material, which is used to convert a blue laser beam into a yellow light beam. The shape of the wavelength conversion material 120 may be annular or fan-shaped. The rotating member 110 is used to drive the wavelength conversion material 120 to rotate around the rotation axis A. The wavelength conversion element 100 has a light-transmitting area B, which is surrounded by the rotating member 110, and the rotation axis A is located in the light-transmitting area B, and the light-transmitting area B can be used to allow the light beam to pass through.

[0051] The wavelength conversion element 100 has a first side C1 and a second side C2 that are opposite to each other in the extension direction of the rotation axis A, and the wavelength conversion material 120 is disposed on the surface of the rotating member 110 facing the first side C1. In detail, in the present embodiment, the wavelength conversion element 100 further includes a fixing member 130 and a bearing structure 140. The fixing member 130 surrounds the light-transmitting area B and the rotating member 110. In other words, on a reference plane perpendicular to the rotation axis A, the rotating member 110 is located between the fixing member 130 and the light-transmitting area B, and the rotating member 110 and the fixing member 130 are coaxial structures. In one embodiment, a plurality of locking holes D may be disposed on the fixing member 130 for locking the wavelength conversion element 100 to the lighting system 200 (shown in FIG. 2 ) by means of fixing elements such as screws. Figure 4 ). The bearing structure 140 is connected to the rotating member 110 and is disposed on a side of the rotating member 110 facing the second side C2. In the present embodiment, the radius of the bearing structure 140 is the same as the radius of the rotating member 110. The bearing structure 140 is suitable for carrying the rotating member 110 and rotating together. For example, the rotating member 110 may include a magnetic structure (e.g., a magnet) 112, and the rotating member 110 is, for example, a metal ring. The fixed member 130 includes a coil structure (e.g., a copper coil) 132. By the principle of an electric motor, the fixed member 130 is energized to rotate the rotating member 110 by means of the bearing structure (bearing, Bearing) 140, thereby driving the wavelength conversion material 120 to rotate.

[0052] Therefore, the wavelength conversion element 100 of the present embodiment can rotate without using a motor, so that the wavelength conversion element 100 has a good heat dissipation effect. In addition to the effect of converting the wavelength of the light beam, the wavelength conversion element 100 can be configured in the optical design structure. The light-transmitting area B of the wavelength conversion element 100 can be arranged on the transmission path of the light beam, and an optical element can be further arranged in the light-transmitting area B, thereby improving the internal space utilization of the wavelength conversion element 100. In addition, there is a gap between the rotating member 110 and the fixing member 130 of the present embodiment, so that the wavelength conversion element 100 has low noise and shock-resistant effects.

[0053] FIG. 2A to FIG. 2C They are schematic diagrams from different viewing angles of a wavelength conversion element according to a second embodiment of the present invention. Figure 2C For along Figure 2B Please refer to the cross-sectional diagram of the J-J' line. FIG. 2A to FIG. 2C The structure and advantages of the wavelength conversion element 100A of this embodiment are similar to those of Figures 1A to 1C The embodiments are similar, and only the differences are described below. In the present embodiment, the rotating member 110 surrounds the bearing structure 140. On a reference plane perpendicular to the rotation axis A, the bearing structure 140 is located between the rotating member 110 and the light-transmitting area B, and the fixed member 130 is disposed on the surface of the rotating member 110 facing the second side C2. The rotating member 110 and the bearing structure 140 are combined to form an accommodating space so that the coil structure 132 of the fixed member 130 can be located between the magnetic structure 112 of the rotating member 110 and the bearing structure 140. There is a gap between the coil structure 132 and the magnetic structure 112. The wavelength conversion material 120 is disposed on the surface of the rotating member 110 facing the first side C1. The radius of the bearing structure 140 is smaller than the radius of the rotating member 110.

[0054] Figure 3 Schematic diagram of a wavelength conversion element according to a third embodiment of the present invention. Figure 3 The structure and advantages of the wavelength conversion element 100B of this embodiment are similar to those of Figures 1A to 1C The embodiments are similar, and only the differences are described below. In the present embodiment, the rotating member 110 and the fixed member 130 form an annular groove E, and the bearing structure 140 is disposed between the rotating member 110 and the fixed member 130, and is located in the annular groove E. Therefore, when the fixed member 130 is energized, the rotating member 110 rotates by means of the bearing structure 140 located in the annular groove E, thereby driving the wavelength conversion material 120 to rotate. In the present embodiment, the fixed member 130 surrounds the rotating member 110. However, in another embodiment, the rotating member 110 may be configured to surround the fixed member 130.

[0055] Figure 4 is a schematic diagram of a projection device according to an embodiment of the present invention. Figure 4The projection device (projector) 10 of this embodiment includes an illumination system 50, at least one light valve 60 and a projection lens 70, and the illumination system 50 includes the wavelength conversion element 100 of any of the above embodiments. The illumination system 50 is used to provide an illumination beam LB. At least one light valve 60 is disposed on the transmission path of the illumination beam LB to convert the illumination beam LB into an image beam LI. The projection lens 70 is disposed on the transmission path of the image beam LI and is used to project the image beam LI out of the projection device 10 to a projection target (not shown), such as a screen or a wall.

[0056] The light valve 60 is, for example, a reflective light modulator such as a Liquid Crystal On Silicon panel (LCoS panel) or a Digital Micro-mirror Device (DMD). In some embodiments, the light valve 60 may also be a transmissive light modulator such as a Transparent Liquid Crystal Panel, an Electro-Optical Modulator, a Magneto-Optic modulator, or an Acousto-Optic Modulator (AOM). The present invention does not limit the form and type of the light valve 60. The detailed steps and implementation methods of the method of converting the illumination light beam LB into the image light beam LI by the light valve 60 can be sufficiently taught, suggested, and implemented by the common knowledge in the relevant technical field, so they are not repeated here. In this embodiment, the number of the light valves 60 can be one to three, that is, for example, an optical architecture of 1DMD, 2DMD, or 3DMD.

[0057] The projection lens 70 includes, for example, a combination of one or more optical lenses with refractive power, such as various combinations of non-planar lenses such as biconcave lenses, biconvex lenses, concave-convex lenses, convex-concave lenses, plano-convex lenses, and plano-concave lenses. In one embodiment, the projection lens 70 may also include a planar optical lens that projects the image beam LI from the light valve 60 to the projection target in a reflective manner. The present invention does not limit the type and type of the projection lens 70.

[0058] Figure 5 FIG. 2 is a schematic diagram of a lighting system according to a first embodiment of the present invention. The lighting system 200 of this embodiment can be applied to at least Figure 4 Projection device 10. Please refer to Figure 5In this embodiment, the lighting system 200 includes a light source module 210, a semi-transmissive and semi-reflective element 220, a wavelength conversion element 100, and a first beam splitter element 230. The light source module 210 is used to provide a laser beam L1, and the laser beam L1 includes a first portion L11 and a second portion L12. The light source module 210 includes at least one light emitting element, and the at least one light emitting element is, for example, a light emitting diode, a laser diode, or a combination thereof. The laser beam L1 is a blue light beam.

[0059] The semi-transmissive and semi-reflective element 220 is disposed on the transmission path of the laser beam L1, allowing one of the first part L11 and the second part L12 of the laser beam L1 to penetrate and reflect the other one. For example, in the present embodiment, the semi-transmissive and semi-reflective element 220 is used to allow the first part L11 to penetrate and reflect the second part L12. In other words, the semi-transmissive and semi-reflective element 220 reflects 50% of the laser beam L1 and allows the other 50% of the laser beam L1 to pass through. In the present embodiment, the semi-transmissive and semi-reflective element 220 is, for example, a semi-transmissive and semi-reflective mirror or a light-transmitting element coated with a film that reflects 50% of the laser beam L1.

[0060] The wavelength conversion element 100 is disposed on the transmission path of the second portion L12 of the laser beam L1, wherein the wavelength conversion material 120 in the wavelength conversion element 100 is used to convert the laser beam L1 into a conversion beam L2. In this embodiment, the wavelength conversion element 100 is disposed between the light source module 210 and the semi-transmissive semi-reflective element 220, that is, the light source module 210 is located on the wavelength conversion element 100 toward the second side C2 (shown in FIG. Figure 1A ). The light-transmitting area B of the wavelength conversion element 100 is located on the transmission path of the laser beam L1 from the light source module 210. Therefore, the laser beam L1 from the light source module 210 passes through the light-transmitting area B of the wavelength conversion element 100 and then enters the semi-transmissive and semi-reflective element 220.

[0061] The first beam splitter 230 is disposed on the transmission path of the first portion L11 of the laser beam L1 and the conversion beam L2, and is used to allow one of the laser beam L1 and the conversion beam L2 to penetrate and reflect the other. For example, in this embodiment, the first beam splitter 230 is used to allow the conversion beam L2 to penetrate and reflect the laser beam L1 (i.e., the first portion L11). Therefore, the first beam splitter 230 is suitable for guiding the first portion L11 of the laser beam L1 and the conversion beam L2 to the same transmission path. The first beam splitter 230 is, for example, a blue light reflecting beam splitter or an optical element coated with a film reflecting a blue light band. In other embodiments, the lighting system 200 may further include a reflector, which is used to guide at least one of the laser beam L1 and the conversion beam L2.

[0062] In the present embodiment, the lighting system 200 may further include a light homogenizing element 240, which is disposed on the transmission path of the first part L11 of the laser beam L1 and the conversion beam L2. The lighting beam LB includes at least one of the first part L11 of the laser beam L1 and the conversion beam L2. In the present embodiment, since the transmission of the first part L11 and the second part L12 of the laser beam L1 is performed simultaneously, the first part L11 of the laser beam L1 and the conversion beam L2 can be transmitted to the light homogenizing element 240 at the same timing, and then form multiple light paths through the spectroscopic element (not shown in the figure), and are respectively incident on multiple light valves 60. The lighting system 200 of the present embodiment does not require the use of a filter wheel. In the present embodiment, the semi-transmissive and semi-reflective element 220, the first spectroscopic element 230 and the light homogenizing element 240 are located on the wavelength conversion element 100 toward the first side C1 (shown in Figure 1A ) side. The light homogenizing element 240 is used to adjust the shape of the light spot formed by the illumination light beam LB on the light valve 60. The light homogenizing element 240 is, for example, an integrating rod or a lens array (fly eye lens array, fly eye lens array).

[0063] In the present embodiment, the lighting system 200 may further include an optical lens 250, such as a focusing lens, which is disposed in the light-transmitting area B of the wavelength conversion element 100 to allow at least one of the laser beam L1 and the converted beam L2 to pass through. The orthographic projection of the optical lens 250 on the rotation axis A at least partially overlaps with the orthographic projection of the wavelength conversion element 100 on the rotation axis A. For example, the optical lens 250 may be disposed in the light-transmitting area B by a supporting member such as a bracket. In the present embodiment, the light-transmitting area B of the wavelength conversion element 100 is used to allow the laser beam L1 from the light source module 210 to pass through. In this way, by configuring the light-transmitting area B of the wavelength conversion element 100 with other optical elements (e.g., the optical lens 250) to be used, the internal space utilization of the wavelength conversion element 100 can be further improved to reduce the volume of the lighting system 200 and the projection device 10.

[0064] Figure 6 is a schematic diagram of a lighting system according to a second embodiment of the present invention. Figure 6 . Figure 6 The structure and advantages of the lighting system 200A are similar to Figure 5The illumination system 200A is a light-emitting diode (LED) illumination system 200, and only the differences are described below. In the present embodiment, the semi-transmissive and semi-reflective element 220 is used to allow the second part L12 of the laser beam L1 to pass through, and to reflect the first part L11 of the laser beam L1. The first beam splitter element 230 is disposed on the transmission path of the second part L12 of the laser beam L1 and the conversion beam L2, and is used to allow the laser beam L1 (i.e., the second part L12) to pass through, and to reflect the conversion beam L2. The first beam splitter element 230 is, for example, a reflective green-red light beam splitter or an optical element coated with a film reflecting the green-red light band. In addition, in the present embodiment, the illumination system 200A further includes a second beam splitter element 260, which is disposed on the transmission path of the first part L11 of the laser beam L1 and the conversion beam L2, and is used to allow the laser beam L1 (i.e., the first part L11) to pass through, and to reflect the conversion beam L2. In this embodiment, the wavelength conversion element 100 is disposed between the light homogenizing element 240 and the second beam splitter 260, and the light passing area B of the wavelength conversion element 100 is located on the transmission path of the laser beam L1 (i.e., the first portion L11) from the second beam splitter 260 and the conversion beam L2. In this embodiment, the transmission path of the laser beam L1 provided by the light source module 210 is aligned with the rotation axis A (shown in FIG. 1- Figure 3 In this embodiment, the light source module 210, the semi-transmissive and semi-reflective element 220 and the first beam splitter element 230 are located on the wavelength conversion element 100 facing the first side C1 (shown in FIG. Figure 1A The light homogenizing element 240 is located on the wavelength conversion element 100 toward the second side C2 (shown in FIG. Figure 1A ) on one side.

[0065] Figure 7 is a schematic diagram of a lighting system according to a third embodiment of the present invention. Figure 7 . Figure 7 The structure and advantages of the lighting system 200B are similar to Figure 6 In this embodiment, the transmission path of the laser beam L1 provided by the light source module 210 of the illumination system 200B is aligned with the rotation axis A (shown in FIG. 1- Figure 3 )vertical.

[0066] In summary, in the wavelength conversion element, the lighting system and the projection device of the present invention, the wavelength conversion element includes a rotating member and a wavelength conversion material. The wavelength conversion element has a light-transmitting area, which is surrounded by the rotating member, and the light-transmitting area is used to allow at least one of the laser beam and the converted beam to pass through. In this way, in addition to having the effect of converting the wavelength of the light beam, in the optical design framework, the light-transmitting area of ​​the wavelength conversion element can be arranged on the transmission path of the light beam, thereby improving the internal space utilization of the wavelength conversion element to reduce the volume of the lighting system and the projection device.

[0067] The above description is only a preferred embodiment of the present invention, and the scope of the present invention cannot be limited by this. That is, all simple equivalent changes and modifications made in accordance with the claims of the present invention and the specification of the present invention are still within the scope of the patent of the present invention. In addition, any embodiment or claim of the present invention is not required to achieve all the purposes, advantages or features disclosed in the present invention. In addition, the abstract of the specification and the name of the invention are only used to assist in the retrieval of patent documents, and are not used to limit the scope of rights of the present invention. In addition, the terms "first", "second", etc. mentioned in this specification or claims are only used to name the name of the element or to distinguish different embodiments or scopes, and are not used to limit the upper or lower limit of the number of elements.

Claims

1. A wavelength conversion element, the wavelength conversion element being adapted to rotate about a rotation axis, characterized in that: The wavelength conversion element comprises a rotating part and a wavelength conversion material, wherein: The wavelength conversion material is disposed on the rotating member, and the wavelength conversion material is used to convert the laser beam into a conversion beam; The rotating member is used to drive the wavelength conversion material to rotate around the rotating axis; and The wavelength conversion element has a light-transmitting area, which is surrounded by the rotating member and is used for allowing at least one of the laser beam and the converted beam to pass through the light-transmitting area.

2. The wavelength conversion element according to claim 1, characterized in that: The wavelength conversion element also includes a fixing part and a bearing structure, wherein the fixing part surrounds the light-transmitting area, and the bearing structure is connected to the rotating part. The wavelength conversion element has a first side and a second side opposite to each other in the extension direction of the rotating shaft, and the wavelength conversion material is arranged on the surface of the rotating part facing the first side.

3. The wavelength conversion element according to claim 2, characterized in that The fixing member surrounds the rotating member, and the bearing structure is disposed on a side of the rotating member facing the second side.

4. The wavelength conversion element according to claim 3, characterized in that: The radius of the bearing structure is the same as the radius of the rotating member.

5. The wavelength conversion element according to claim 2, characterized in that: The rotating member surrounds the bearing structure, the bearing structure is located between the rotating member and the light-transmitting area, and the fixing member is configured on a surface of the rotating member facing the second side.

6. The wavelength conversion element according to claim 5, characterized in that: The radius of the bearing structure is smaller than the radius of the rotating member.

7. The wavelength conversion element according to claim 2, characterized in that: The rotating member and the fixed member form an annular groove, and the bearing structure is arranged between the rotating member and the fixed member and is located in the annular groove.

8. A lighting system for providing a lighting beam, characterized in that: The lighting system comprises a light source module, a semi-transmissive and semi-reflective element, a wavelength conversion element and a first light splitting element, wherein: The light source module is used to provide a laser beam, and the laser beam includes a first part and a second part; The semi-transmissive and semi-reflective element is disposed on the transmission path of the laser beam, allowing one of the first portion and the second portion to penetrate and reflect the other; The wavelength conversion element is disposed on the transmission path of the second portion of the laser beam, the wavelength conversion element is suitable for rotating around a rotation axis, and the wavelength conversion element includes a rotating part and a wavelength conversion material, wherein: The wavelength conversion material is disposed on the rotating member, and the wavelength conversion material is used to convert the laser beam into a conversion beam; The rotating member is used to drive the wavelength conversion material to rotate around the rotating axis; and The wavelength conversion element has a light-transmitting area, the light-transmitting area is surrounded by the rotating member, and the light-transmitting area is used to allow at least one of the laser beam and the converted beam to pass through; and The first beam splitter is disposed on the transmission paths of the laser beam and the conversion beam to allow one of the laser beam and the conversion beam to penetrate and reflect the other one. The illumination beam includes at least one of the first portion of the laser beam and the conversion beam.

9. The lighting system according to claim 8, characterized in that The lighting system further includes a light homogenizing element, and the light homogenizing element is disposed on a transmission path of the first portion of the laser beam and the converted beam.

10. The lighting system according to claim 8, characterized in that The wavelength conversion element also includes a fixing part and a bearing structure, wherein the fixing part surrounds the light-transmitting area, and the bearing structure is connected to the rotating part. The wavelength conversion element has a first side and a second side opposite to each other in the extension direction of the rotating shaft, and the wavelength conversion material is arranged on the surface of the rotating part facing the first side.

11. The lighting system according to claim 10, characterized in that The fixing member surrounds the rotating member, and the bearing structure is disposed on a side of the rotating member facing the second side.

12. The lighting system according to claim 11, characterized in that The radius of the bearing structure is the same as the radius of the rotating member.

13. The lighting system according to claim 10, characterized in that The rotating member surrounds the bearing structure, the bearing structure is located between the rotating member and the light-transmitting area, and the fixing member is configured on a surface of the rotating member facing the second side.

14. The lighting system according to claim 13, characterized in that The radius of the bearing structure is smaller than the radius of the rotating member.

15. The lighting system according to claim 10, characterized in that The rotating member and the fixed member form an annular groove, and the bearing structure is arranged between the rotating member and the fixed member and is located in the annular groove.

16. The lighting system according to claim 8, characterized in that The illumination system further includes an optical lens, which is disposed in the light-transmitting area of ​​the wavelength conversion element and is used to allow at least one of the laser beam and the converted beam to pass through.

17. The lighting system according to claim 8, characterized in that The semi-transmissive and semi-reflective element is used to allow the first part to penetrate and reflect the second part, and the first beam splitting element is used to allow the converted light beam to penetrate and reflect the laser light beam.

18. The lighting system according to claim 17, characterized in that The wavelength conversion element is disposed between the light source module and the semi-transmissive and semi-reflective element, and the light-transmitting region of the wavelength conversion element is located on a transmission path of the laser beam from the light source module.

19. The lighting system according to claim 8, characterized in that The semi-transmissive and semi-reflective element is used to allow the second part to penetrate and reflect the first part, and the first spectroscopic element is used to allow the laser beam to penetrate and reflect the converted beam. The lighting system also includes a second spectroscopic element, which is arranged on the transmission path of the first part of the laser beam and the converted beam, and is used to allow the laser beam to penetrate and reflect the converted beam.

20. The lighting system according to claim 19, characterized in that The lighting system also includes a light homogenizing element, which is configured on the transmission path of the first part of the laser beam and the converted beam. The wavelength conversion element is configured between the light homogenizing element and the second beam splitting element, and the light-transmitting area of ​​the wavelength conversion element is located on the transmission path of the laser beam and the converted beam from the second beam splitting element.

21. The lighting system according to claim 8, characterized in that A transmission path of the laser beam provided by the light source module is parallel to the rotation axis of the wavelength conversion element.

22. The lighting system according to claim 8, characterized in that A transmission path of the laser beam provided by the light source module is perpendicular to the rotation axis of the wavelength conversion element.

23. A projection device, characterized in that: The projection device comprises an illumination system, at least one light valve and a projection lens, wherein: The lighting system is used to provide an illumination beam, and the lighting system includes a light source module, a semi-transmissive and semi-reflective element, a wavelength conversion element, and a first beam splitter element, wherein: The light source module is used to provide a laser beam, and the laser beam includes a first part and a second part; The semi-transmissive and semi-reflective element is disposed on the transmission path of the laser beam, allowing one of the first portion and the second portion to penetrate and reflect the other; The wavelength conversion element is disposed on the transmission path of the second portion of the laser beam, the wavelength conversion element is suitable for rotating around a rotation axis, and the wavelength conversion element includes a rotating part and a wavelength conversion material, wherein: The wavelength conversion material is disposed on the rotating member, and the wavelength conversion material is used to convert the laser beam into a conversion beam; The rotating member is used to drive the wavelength conversion material to rotate around the rotating axis; and The wavelength conversion element has a light-transmitting area, the light-transmitting area is surrounded by the rotating member, and the light-transmitting area is used to allow at least one of the laser beam and the converted beam to pass through; and The first beam splitter is disposed on the transmission paths of the laser beam and the converted beam, and is used to allow one of the laser beam and the converted beam to penetrate and reflect the other one, and the illumination beam includes at least one of the first portion of the laser beam and the converted beam; The at least one light valve is disposed on the transmission path of the illumination light beam, and is used to convert the illumination light beam into an image light beam; and The projection lens is arranged on the transmission path of the image light beam and is used for projecting the image light beam out of the projection device.

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