Wavelength conversion module and projection device

Abstract

The present application provides a wavelength conversion module, which includes a driving assembly, a substrate, a light-transmitting plate and a wavelength conversion layer. The driving assembly is connected to the substrate and drives the substrate to rotate around the center of the substrate. The substrate is a metal substrate and includes a first concave-convex structure and a second concave-convex structure, and the substrate, the first concave-convex structure and the second concave-convex structure are integrally formed. The first concave-convex structure and the second concave-convex structure are arranged around the center of the substrate, and the second concave-convex structure surrounds the first concave-convex structure. The substrate has a first balance hole and a receiving groove. The first concave-convex structure is located between the receiving groove and the center in the radial direction of the substrate. The first balance hole is located in the receiving groove and penetrates through the substrate. The light-transmitting plate is arranged in the receiving groove of the substrate and covers the first balance hole. The wavelength conversion layer is arranged on the substrate and arranged in an annular pattern with the light-transmitting plate. The wavelength conversion module and the projection device using the wavelength conversion module of the present application can effectively reduce the production cost and improve the structural reliability.

Description

Technical Field

[0001] This invention relates to an optical module and a projection device, and more particularly to a wavelength conversion module and a projection device having the wavelength conversion module. Background Technology

[0002] Solid-state illumination (SSI) projectors typically incorporate a laser light source module. The phosphor wheel is positioned along the path of the excitation beam from the laser light source module. The excitation beam, emitted by the laser, is blue and is projected onto the wavelength conversion region of the phosphor wheel to excite a yellow conversion beam, thus synthesizing white light. Generally, a metal counterweight ring is additionally assembled into the phosphor wheel structure for subsequent balancing and calibration. Balancing materials or adhesives can also be filled onto the metal counterweight ring. Currently, metal counterweight rings are mostly fixed to the heat sink through an adhesive bonding process. However, the adhesive is susceptible to degradation due to heat from the heat sink, reducing the reliability of the phosphor wheel structure. Furthermore, the metal counterweight ring's structure is more complex and has higher production costs. The limitations imposed by the metal counterweight ring prevent the phosphor wheel structure from being simplified, easily causing vibration and noise during operation, thus affecting the phosphor wheel's quality and lifespan. Additionally, current heat sinks typically have grooves to accommodate coated transparent glass, and the metal counterweight ring needs to contact a portion of the coated transparent glass to secure it. Therefore, without a metal counterweight ring, the coated transparent glass cannot be effectively fixed, and the structural reliability is low.

[0003] The "Background Art" paragraph is only used to help understand the content of this invention. Therefore, the content disclosed in the "Background Art" paragraph may include some prior art that is not known to those skilled in the art. The content disclosed in the "Background Art" paragraph does not mean that the content or the problem to be solved by one or more embodiments of this invention was known or recognized by those skilled in the art before this application was filed. Summary of the Invention

[0004] This invention provides a wavelength conversion module with better reliability.

[0005] The present invention also provides a projection device, which includes the wavelength conversion module described above, and has high reliability and long service life.

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

[0007] To achieve one, some, or all of the above-mentioned objectives, or other objectives, an embodiment of the present invention provides a wavelength conversion module, comprising a driving component, a substrate, a light-transmitting plate, and a wavelength conversion layer. The driving component is connected to the substrate and drives the substrate to rotate about its center. The substrate is a metal substrate and includes a first convex-concave structure and a second convex-concave structure, which are integrally formed. The first and second convex-concave structures are arranged around the center of the substrate, with the second convex-concave structure surrounding the first convex-concave structure. The substrate has a first balancing hole and a receiving groove. The first convex-concave structure is located radially between the receiving groove and the center of the substrate. The first balancing hole is located in the receiving groove and penetrates the substrate. The light-transmitting plate is disposed in the receiving groove of the substrate and covers the first balancing hole. The wavelength conversion layer is disposed on the substrate and arranged in a circular pattern with the light-transmitting plate.

[0008] To achieve one or more of the above-mentioned objectives, or other objectives, an embodiment of the present invention provides a projection device, including an illumination module, a light valve, and a projection lens. The illumination module provides an illumination beam and includes a light source device and a wavelength conversion module. The light source device provides an excitation beam. The wavelength conversion module is disposed on the transmission path of the excitation beam. The wavelength conversion module includes a driving component, a substrate, a light-transmitting plate, and a wavelength conversion layer. The driving component is connected to the substrate and drives the substrate to rotate about the center of the substrate. The substrate is a metal substrate and includes a first convex-concave structure and a second convex-concave structure, which are integrally formed. The first convex-concave structure and the second convex-concave structure are disposed around the center of the substrate, and the second convex-concave structure surrounds the first convex-concave structure. The substrate has a first balancing hole and a receiving groove. The first convex-concave structure is located radially between the receiving groove and the center of the substrate. The first balancing hole is located in the receiving groove and penetrates the substrate. The light-transmitting plate is disposed in the receiving groove of the substrate and covers the first balancing hole. The wavelength conversion layer is disposed on the substrate and arranged in a circular pattern with the light-transmitting plate. A wavelength conversion layer receives the excitation beam and generates a converted beam, while the illumination beam includes both the converted beam and the excitation beam. A light valve is positioned in the transmission path of the illumination beam to convert it into an image beam. A projection lens is positioned in the transmission path of the image beam to project the image beam out of the projection device.

[0009] Based on the above, the embodiments of the present invention have at least one of the following advantages or effects. In the design of the wavelength conversion module of the present invention, the substrate is a metal substrate, and the substrate, the first concave-convex structure, and the second concave-convex structure are integrally formed. The substrate has a first balancing hole and a receiving groove, wherein the first balancing hole is located in the receiving groove and penetrates the substrate, and the light-transmitting plate covers the first balancing hole and is arranged in a ring pattern with the wavelength conversion layer. This achieves both balance correction and heat dissipation simultaneously, eliminating the need for the metal counterweight ring configured through a bonding process as in the prior art. Therefore, it effectively reduces process steps, lowers production costs, and improves structural reliability. Furthermore, the projection device using the wavelength conversion module of the present invention has higher reliability and a longer service life, thereby enhancing product competitiveness. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a projection device according to an embodiment of the present invention.

[0011] Figure 2A yes Figure 1 A three-dimensional schematic diagram of the wavelength conversion module of the projection device.

[0012] Figure 2B yes Figure 2A A three-dimensional exploded view of the wavelength conversion module.

[0013] Figure 2C yes Figure 2A A three-dimensional schematic diagram of the substrate of the wavelength conversion module.

[0014] Figure 2D This is a perspective view of a substrate of a wavelength conversion module according to another embodiment of the present invention.

[0015] Figure 3A This is a perspective view of a wavelength conversion module according to another embodiment of the present invention.

[0016] Figure 3B yes Figure 3A A three-dimensional schematic diagram of the substrate of the wavelength conversion module.

[0017] Figure 4A This is a perspective view of a wavelength conversion module according to another embodiment of the present invention.

[0018] Figure 4B yes Figure 4A A three-dimensional schematic diagram of the substrate of the wavelength conversion module.

[0019] Figure 5A This is a perspective view of a wavelength conversion module according to another embodiment of the present invention.

[0020] Figure 5Byes Figure 5A A three-dimensional schematic diagram of the substrate of the wavelength conversion module.

[0021] Figure 6A This is a perspective view of a wavelength conversion module according to another embodiment of the present invention.

[0022] Figure 6B yes Figure 6A A three-dimensional schematic diagram of the substrate of the wavelength conversion module.

[0023] Figure 7A This is a perspective view of a wavelength conversion module according to another embodiment of the present invention.

[0024] Figure 7B yes Figure 7A A three-dimensional schematic diagram of the substrate of the wavelength conversion module.

[0025] Figure 8A This is a perspective view of a wavelength conversion module according to another embodiment of the present invention.

[0026] Figure 8B yes Figure 8A A three-dimensional exploded view of the wavelength conversion module.

[0027] Figure 8C yes Figure 8A A three-dimensional schematic diagram of the substrate of the wavelength conversion module.

[0028] Figure 8D yes Figure 8C A three-dimensional schematic diagram of the substrate from another perspective.

[0029] List of reference numerals

[0030] 10: Projection device

[0031] 12: Lighting Module

[0032] 13: Light source device

[0033] 14: Light valve

[0034] 16: Projection lens

[0035] 100a, 100b, 100c, 100d, 100e, 100f, 100g: Wavelength conversion module 110: Drive component

[0036] 120a, 120f, 120g: substrate

[0037] 122a, 122a', 122f, 122g: First balancing holes

[0038] 123: First penetrating section

[0039] 124a, 124f: Receiving slots

[0040] 125: Second penetrating section

[0041] 125f, 125g: Support section

[0042] 126a, 126f, 126g: Second balancing holes

[0043] 127f, 127g: Sidewall portion

[0044] 128g: Groove

[0045] 129g: Balance boss

[0046] 130a, 130b, 130c, 130d, 130e, 130f, 130g: First concave-convex structure; 132b, 132c: Boss portion

[0047] 132d: Annular boss

[0048] 134d: Extended boss portion

[0049] 140a, 140b, 140c, 140d, 140e, 140f, 140g: Second concave-convex structure; 142a, 142b, 142c, 142d, 142e, 142f, 142g, 192: Turbulence section

[0050] 150: Translucent panel

[0051] 160: Wavelength conversion layer

[0052] 162: Outer side

[0053] 164: Inner side

[0054] 170, 175, 179: Filler

[0055] 180: First adhesive layer

[0056] 185: Second adhesive layer

[0057] 187: Reflective layer

[0058] 190: Third concave-convex structure

[0059] C: Center

[0060] D1: First Connection

[0061] D2: Second connection

[0062] D3: First extension direction

[0063] D4: Second extension direction

[0064] L1: illumination beam

[0065] L11: Excitation beam

[0066] L12: Beam Conversion

[0067] L2: Image Beam

[0068] P: Circular pattern

[0069] W1, W2: Radial width

[0070] W3: First radial width

[0071] W4: Second radial width

[0072] S1: Bearing surface

[0073] S2, S3: Surface

[0074] T: Filling groove. Detailed Implementation

[0075] The foregoing 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 accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front, or back, are merely for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting the present invention.

[0076] Figure 1 This is a schematic diagram of a projection device according to an embodiment of the present invention. Please refer to... Figure 1 In this embodiment, the projection device 10 includes an illumination module 12, a light valve 14, and a projection lens 16. The illumination module 12 provides an illumination beam L1 and includes a light source device 13 and a wavelength conversion module 100a. The light source device 13 provides an excitation beam L11. The wavelength conversion module 100a is positioned along the transmission path of the excitation beam L11 from the light source device 13. The wavelength conversion layer 160 of the wavelength conversion module 100a (see reference...) Figure 2A The wavelength conversion module 100a receives the excitation beam L11 and generates a converted beam L12. The wavelength of the converted beam L12 is different from that of the excitation beam L11. The light-transmitting plate 150 of the wavelength conversion module 100a (please refer to...) Figure 2AAn excitation beam L11 is allowed to pass through, and the illumination beam L1 includes a conversion beam L12 and the excitation beam L11. In this embodiment, the excitation beam L11 may be, for example, a blue beam, and the conversion beam L12 may be, for example, a yellow beam and / or a green beam, but is not limited thereto. A light valve 14 is disposed on the transmission path of the illumination beam L1 from the illumination module 12 to convert the illumination beam L1 into an image beam L2. A projection lens 16 is disposed on the transmission path of the image beam L2 from the light valve 14 to project the image beam L2 out of the projection device 10.

[0077] In detail, the light source device 13 used in this embodiment is, for example, a laser diode (LD), and for example, a laser diode or a laser diode bank. Specifically, any light source that meets the size requirements of the actual design can be implemented, and the present invention is not limited thereto. The light valve 14 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 one embodiment, the light valve 14 is, for example, a transparent liquid crystal panel, an electro-optic modulator, a magneto-optic modulator, an acousto-optic modulator (AOM), or a transmissive light modulator, but this embodiment does not limit the type or kind of the light valve 14. The method by which the light valve 14 converts the illumination beam L1 into the image beam L2 is described in detail, and its implementation is well-taught, suggested, and explained by knowledge of the art; therefore, it will not be elaborated further. Additionally, the projection lens 16 may include, for example, a combination of one or more optical lenses with refractive power, such as various combinations of non-planar lenses including biconcave lenses, biconvex lenses, concave-convex lenses, convex-concave lenses, plano-convex lenses, and plano-concave lenses. In one embodiment, the projection lens 16 may also include planar optical lenses to project the image beam L2 from the light valve 14 out of the projection device 10 in a reflective or transmissive manner to form a large-size image. Therefore, this embodiment does not limit the type or form of the projection lens 16.

[0078] Figure 2A yes Figure 1 A three-dimensional schematic diagram of the wavelength conversion module of the projection device. Figure 2B yes Figure 2A A three-dimensional exploded view of the wavelength conversion module. Figure 2C yes Figure 2AA three-dimensional schematic diagram of the substrate of the wavelength conversion module. Figure 2D This is a perspective view of a substrate of a wavelength conversion module according to another embodiment of the present invention.

[0079] Please refer to the following at the same time. Figure 2A , Figure 2B as well as Figure 2C In this embodiment, the wavelength conversion module 100a includes a driving component 110, a substrate 120a, a light-transmitting plate 150, and a wavelength conversion layer 160. The driving component 110 is connected to the substrate 120a and drives the substrate 120a to rotate about its center C. The substrate 120a is a metal substrate and includes a first convex-concave structure 130a and a second convex-concave structure 140a, which are integrally formed. The first convex-concave structure 130a and the second convex-concave structure 140a are formed, for example, by stamping the metal substrate 120a. The first convex-concave structure 130a and the second convex-concave structure 140a are arranged around the center C of the substrate 120a, and the second convex-concave structure 140a surrounds the first convex-concave structure 130a. The substrate 120a has a first balancing hole 122a and a receiving groove 124a. The first concave-convex structure 130a is located radially between the receiving groove 124a and the center C of the substrate 120a. A first balancing hole 122a is located in the receiving groove 124a and penetrates the substrate 120a, wherein the first balancing hole 122a is formed, for example, through the bottom surface of the receiving groove 124a. A light-transmitting plate 150 is disposed within the receiving groove 124a of the substrate 120a and completely covers the first balancing hole 122a. A wavelength conversion layer 160 is disposed on the substrate 120a and arranged with the light-transmitting plate 150 to form a complete annular pattern P. Here, the driving component 110 is, for example, a motor; the substrate 120a is made of, for example, aluminum, aluminum alloy, copper, or stainless steel; the light-transmitting plate 150 is made of, for example, glass or plastic; the wavelength conversion layer 160 is, for example, a phosphor layer; and the wavelength conversion module 100a includes, for example, multiple wavelength conversion layers 160, which are respectively configured with phosphor layers capable of converting different wavelength beams, but are not limited thereto.

[0080] To go further, such as Figure 2AAs shown, in this embodiment, the second concave-convex structure 140a is located radially between the annular pattern P and the first concave-convex structure 130a on the substrate 120a, that is, radially away from the center C of the substrate 120a. The first concave-convex structure 130a, the second concave-convex structure 140a, and the annular pattern P are arranged in a concentric ring sequence. The first concave-convex structure 130a is, for example, a complete annular boss, while the second concave-convex structure 140a includes, for example, a plurality of mutually separated turbulence portions 142a. Furthermore, the wavelength conversion module 100a in this embodiment also includes a filler 170 disposed on the substrate 120a. The filler 170 is located radially between the first concave-convex structure 130a and the center C on the substrate 120a and is adjacent to the first concave-convex structure 130a. In other words, the first concave-convex structure 130a can serve as the location for the filler 170 for filling the balance correction material. Because the first concave-convex structure 130a presents a closed ring structure, the filler 170 can be supported on the inner side of the first concave-convex structure 130a that protrudes from the surface of the substrate 120a to withstand the centrifugal force when the wavelength conversion module 100a rotates. The turbulence-inducing portions 142a are point-like, non-closed, and discontinuous ring structures, meaning they are spaced apart and distributed in a ring around the periphery of the first concave-convex structure 130a. When the wavelength conversion module 100a rotates at high speed, they can drive the airflow to flow rapidly, generating turbulence to increase the heat dissipation effect between the substrate 120a and the wavelength conversion layer 160, thereby reducing the temperature of the wavelength conversion layer 160 and improving the excitation efficiency of the wavelength conversion material. Furthermore, the arrangement of the first concave-convex structure 130a and the second concave-convex structure 140a also strengthens the rigidity of the substrate 120a, thereby reducing deformation during the stamping, wavelength conversion module 100a processing, and curing processes.

[0081] Furthermore, please also refer to Figure 2A , Figure 2B as well as Figure 2C In this embodiment, the substrate 120a further has a second balancing hole 126a, which is located radially between the first concave-convex structure 130a and the center C and penetrates the substrate 120a. The driving assembly 110 connecting the substrate 120a covers the second balancing hole 126a. The first line D1 connecting the center of the first balancing hole 122a and the center C of the substrate 120a is, for example, a second line D2 perpendicular to the center of the second balancing hole 126a and the center C of the substrate 120a, thereby achieving balance in the X and Y directions, but is not limited thereto.

[0082] In addition, please refer to Figure 2BThe wavelength conversion module 100a of this embodiment further includes a first adhesive layer 180, a second adhesive layer 185, and a reflective layer 187. The first adhesive layer 180 is disposed between the driving component 110 and the substrate 120a, wherein the driving component 110 is connected to the substrate 120a through the first adhesive layer 180. The second adhesive layer 185 is disposed between the light-transmitting plate 150 and the receiving groove 124a, wherein the light-transmitting plate 150 is connected to the receiving groove 124a of the substrate 120a through the second adhesive layer 185. The reflective layer 187 is disposed between the wavelength conversion layer 160 and the substrate 120a, wherein the reflective layer 187 is, for example, a coated specular reflection layer, a coated diffuse reflection layer, or a composite of the above two coatings, but is not limited thereto.

[0083] It should be noted that, Figure 2C The first balancing hole 122a shown is specifically a curved rectangular through hole extending along the circumferential direction, but this embodiment does not limit the design of the first balancing hole 122a. For another embodiment, please refer to... Figure 2D The first balancing hole 122a' located in the receiving groove 124a consists of a first through-hole 123 and a second through-hole 125 with different radial widths and arranged adjacent to each other. The first through-hole 123 and the second through-hole 125 are interconnected. The radial width W1 of the first through-hole 123 is greater than the radial width W2 of the second through-hole 125, but is not limited to this. That is, the first through-hole 123 and the second through-hole 125 have different radial widths, thereby allowing for fine-tuning of the dynamic balance of the wavelength conversion module.

[0084] In short, the substrate 120a, the first concave-convex structure 130a, and the second concave-convex structure 140a of this embodiment are integrally formed. The substrate 120a has a first balancing hole 122a, a receiving groove 124a, and a second balancing hole 126a. The light-transmitting plate 150 is disposed in the receiving groove 124a and completely covers the first balancing hole 122a. The driving assembly 110 is glued to the substrate 120a and completely covers the second balancing hole 126a. This design allows the wavelength conversion module 100a of this embodiment to simultaneously achieve balance correction and heat dissipation. Therefore, it eliminates the need for a metal counterweight ring through a gluing process, as is required in the prior art. This effectively reduces process steps, lowers production costs, and improves structural reliability. Furthermore, the projection device 10 using the wavelength conversion module 100a of this embodiment (see reference...) Figure 1 This allows for higher reliability and a longer service life, thereby enhancing product competitiveness. Furthermore, the wavelength conversion module 100a in this embodiment does not require an additional metal counterweight ring to fix the light-transmitting plate; therefore, the size of the light-transmitting plate can be reduced, thus decreasing its cost and weight.

[0085] It must be noted that the following embodiments use the component reference numerals and some content from the foregoing embodiments, with the same reference numerals used to represent the same or similar components, and descriptions of the same technical content omitted. For explanations of the omitted parts, please refer to the foregoing embodiments; these will not be repeated in the following embodiments.

[0086] Figure 3A This is a perspective view of a wavelength conversion module according to another embodiment of the present invention. Figure 3B yes Figure 3A A three-dimensional schematic diagram of the substrate of the wavelength conversion module. Please also refer to... Figure 2A , Figure 2C , Figure 3A as well as Figure 3B In this embodiment, the wavelength conversion module 100b and Figure 2A Similar to the wavelength conversion module 100a, the difference lies in the following: In this embodiment, the first concave-convex structure 130b includes a plurality of protrusions 132b arranged adjacent to each other, wherein the protrusions 132b are approximately closed, discontinuous annular structures, which can serve as positions for the filler 170 for filling the balance correction material. The second concave-convex structure 140b includes a plurality of turbulence-inducing portions 142b separated from each other, wherein the turbulence-inducing portions 142b are specifically embodied as point-like, non-closed, and discontinuous annular structures, which can drive the airflow to flow rapidly and generate turbulence when the wavelength conversion module 100b rotates at high speed, thereby increasing the heat dissipation effect between the substrate 120a and the wavelength conversion layer 160, and thus reducing the temperature of the wavelength conversion layer 160 to improve the excitation efficiency of the wavelength conversion material. Furthermore, the circumferential spacing between the protrusions 132b of the first concave-convex structure 130b is smaller than the circumferential spacing between the turbulence-inducing portions 142b of the second concave-convex structure 140b.

[0087] Figure 4A This is a perspective view of a wavelength conversion module according to another embodiment of the present invention. Figure 4B yes Figure 4A A three-dimensional schematic diagram of the substrate of the wavelength conversion module. Please also refer to... Figure 3A , Figure 3B , Figure 4A as well as Figure 4B In this embodiment, the wavelength conversion module 100c and Figure 3A Similar to the wavelength conversion module 100b, the difference between the two is that: in this embodiment, the annular pattern P is located between the second concave-convex structure 140c and the first concave-convex structure 130c, that is, in the radial direction of the substrate 120a and in the direction away from the center C of the substrate 120a. The first concave-convex structure 130c, the annular pattern P and the second concave-convex structure 140c are arranged in concentric rings in sequence.

[0088] In detail, in this embodiment, the first concave-convex structure 130c includes a plurality of protrusions 132c arranged adjacent to each other, while the second concave-convex structure 140c includes a plurality of turbulence-inducing portions 142c separated from each other. The protrusions 132c are arranged in an approximately closed ring structure, mainly serving as positions for the filler 170 of the balancing correction material, while the turbulence-inducing portions 142c have a point-like, non-closed, and discontinuous structure, mainly generating turbulence when the wavelength conversion module 100c rotates at high speed, thereby increasing the heat dissipation effect between the substrate 120a and the wavelength conversion layer 160, and thus reducing the temperature of the wavelength conversion layer 160 to improve the excitation efficiency of the wavelength conversion material.

[0089] Preferably, at least one of the first concave-convex structure 130c and the second concave-convex structure 140c contacts the wavelength conversion layer 160. Here, the first concave-convex structure 130c is disposed on the inner side of the wavelength conversion layer 160, while the second concave-convex structure 140c is disposed on the outer side of the wavelength conversion layer 160, and the protrusion portion 132c and the turbulence portion 142c contact the edge of the wavelength conversion layer 160. The first extension direction D3 of any one of the protrusion portions 132c and the second extension direction D4 of its corresponding turbulence portion 142c form a V-shape (or funnel shape) with each other, so that the airflow generated when the wavelength conversion module 100c rotates can flow along the gap between the protrusion portions 132c and the turbulence portion 142c, so that a greater proportion of the airflow enters the surface of the wavelength conversion layer 160 and the substrate 120a on both sides, which can remove the heat generated by the wavelength conversion layer 160 and thus improve the heat dissipation efficiency. In addition, the design of the boss portion 132c and the turbulence portion 142c increases the heat dissipation surface area, thereby also improving the heat dissipation efficiency of the wavelength conversion module 100c.

[0090] Figure 5A This is a perspective view of a wavelength conversion module according to another embodiment of the present invention. Figure 5B yes Figure 5A A three-dimensional schematic diagram of the substrate of the wavelength conversion module. Please also refer to... Figure 4A , Figure 4B , Figure 5A as well as Figure 5B In this embodiment, the wavelength conversion module 100d and Figure 4A Similar to the wavelength conversion module 100c, the difference lies in that: in this embodiment, the first concave-convex structure 130d includes a complete annular boss 132d and a plurality of extended boss portions 134d separated from each other. One end of each extended boss portion 134d is connected to the annular boss 132d and extends radially from the annular boss 132d toward the second concave-convex structure 140d. The second concave-convex structure 140d includes a plurality of turbulence-disrupting portions 142d separated from each other.

[0091] In detail, in this embodiment, at least one of the extended boss portion 134d and the turbulence portion 142d extends into the wavelength conversion layer 160 to form a first radial width W3, wherein the wavelength conversion layer 160 does not cover the extended boss portion 134d and the turbulence portion 142d. Preferably, the first radial width W3 is greater than 1 / 10 of the second radial width W4 of the wavelength conversion layer 160 on the substrate 120a and less than 1 / 2 of the second radial width W4 of the wavelength conversion layer 160. The design of the extended boss portion 134d and the turbulence portion 142d not only increases the turbulence of the heat dissipation airflow, but also reduces the heat energy conducted from the substrate 120a to the filler 170 due to the increased heat dissipation area. Furthermore, since the extended boss portion 134d and the turbulence portion 142d are located closer to the light spot formed by the excitation beam on the wavelength conversion layer 160, the heat dissipation efficiency can be improved by approximately 20% to 30%.

[0092] Figure 6A This is a perspective view of a wavelength conversion module according to another embodiment of the present invention. Figure 6B yes Figure 6A A three-dimensional schematic diagram of the substrate of the wavelength conversion module. Please also refer to... Figure 5A , Figure 5B , Figure 6A as well as Figure 6B In this embodiment, the wavelength conversion module 100e and Figure 5A Similar to the wavelength conversion module 100d, the difference lies in the following: In this embodiment, the first concave-convex structure 130e of the wavelength conversion module 100e includes a complete annular boss (without an extended boss portion), and the substrate 120a of the wavelength conversion module 100e also includes a third concave-convex structure 190, which is integrally formed with the substrate 120a, the first concave-convex structure 130e, and the second concave-convex structure 140e. The third concave-convex structure 190 is arranged around the center C of the substrate 120a and is located between the second concave-convex structure 140e and the first concave-convex structure 130e. The annular pattern P is located between the second concave-convex structure 140e and the third concave-convex structure 190. That is, in the radial direction of the substrate 120a and in the direction away from the center C of the substrate 120a, the first concave-convex structure 130e, the third concave-convex structure 190, the annular pattern P, and the second concave-convex structure 140e are arranged in a concentric ring sequence.

[0093] In detail, in this embodiment, the first concave-convex structure 130e is a complete annular boss, while the second concave-convex structure 140e and the third concave-convex structure 190 each include a plurality of mutually separated turbulence portions 142e and 192. The inner side 164 of the wavelength conversion layer 160 covers a portion of the turbulence portion 192, while the outer side 162 of the wavelength conversion layer 160 and the portion of the turbulence portion 142e are covered. That is, one end of each of the turbulence portions 192 is covered by the inner side 164 of the wavelength conversion layer 160, and one end of each of the turbulence portions 142e is covered by the outer side 162 of the wavelength conversion layer 160. In other words, a portion of the second concave-convex structure 140e and a portion of the third concave-convex structure 190 are disposed below the wavelength conversion layer 160, thus the wavelength conversion layer 160 presents a stepped shape. Furthermore, since the positions of the turbulence sections 142e and 192 are closer to the light spot formed by the excitation beam on the wavelength conversion layer 160, the heat dissipation efficiency of the wavelength conversion module 100e can be improved.

[0094] Figure 7A This is a perspective view of a wavelength conversion module according to another embodiment of the present invention. Figure 7B yes Figure 7A A three-dimensional schematic diagram of the substrate of the wavelength conversion module. Please also refer to... Figure 2A , Figure 2C , Figure 7A as well as Figure 7B In this embodiment, the wavelength conversion module 100f and Figure 2A Similar to the wavelength conversion module 100a, the second concave-convex structure 140f is located between the annular pattern P and the first concave-convex structure 130f, wherein the first concave-convex structure 130f is a complete annular boss, and the second concave-convex structure 140f includes a plurality of mutually separated turbulence portions 142f. The second balancing hole 126f is located radially between the first concave-convex structure 130f and the center C of the substrate 120f and penetrates the substrate 120f, and the drive assembly 110 connecting the substrate 120f completely covers the second balancing hole 126f.

[0095] The wavelength conversion module 100f in this embodiment and Figure 2AThe difference between the wavelength conversion module 100a and the previous one is that, in this embodiment, the receiving groove 124f of the substrate 120f includes a support portion 125f and a sidewall portion 127f. The bearing surface S1 of the support portion 125f is recessed into the surface S2 of the substrate 120f, and the sidewall portion 127f connects the surface S2 of the substrate 120f and the bearing surface S1 of the support portion 125f. The light-transmitting plate 150 is fixed on the support portion 125f, and the support portion 125f surrounds at least two sides of the first balancing hole 122f. In this way, the light-transmitting plate 150 can be disposed on the support portion 125f of the receiving groove 124f, and the light-transmitting plate 150 is flush with the surface S2 of the substrate 120f or with the surface of the adjacent wavelength conversion layer 160. Compared with the prior art, which requires additional metal counterweight rings for fixation, this embodiment allows the light-transmitting plate 150 to be supported by the support portion 125f on a larger surface, and no additional components are required, which can effectively improve the overall reliability.

[0096] Furthermore, the receiving groove 124f in this embodiment is also provided with a first balancing hole 122f, which can be used to balance the imbalance caused by different materials carried at different positions in the wavelength conversion module 100f. In addition, in the optical path structure where the blue excitation beam needs to penetrate the wavelength conversion module 100f, the first balancing hole 122f allows the blue excitation beam to pass through. Compared with the existing technology of directly opening a blue light through hole without attaching a separate glass transmissive phosphor wheel, in this embodiment, the light-transmitting plate 150 completely covers the first balancing hole 122f, which can avoid the wind cutting noise caused by air passing through the first balancing hole 122f when the substrate rotates. In addition, the substrate 120f in this embodiment is also provided with a second balancing hole 126f, located at the bonding position between the substrate 120f and the driving component 110. This makes the hollowed-out second balancing hole 126f appear as a non-through hole after the wavelength conversion module 100f is assembled, or although it is through, it is completely blocked by the driving component 110 in the projection direction, which can avoid the noise caused by wind cutting when the wavelength conversion module 100f is operating.

[0097] Figure 8A This is a perspective view of a wavelength conversion module according to another embodiment of the present invention. Figure 8B yes Figure 8A A three-dimensional exploded view of the wavelength conversion module. Figure 8C yes Figure 8A A three-dimensional schematic diagram of the substrate of the wavelength conversion module. Figure 8D yes Figure 8C A three-dimensional schematic diagram of the substrate from another perspective. Please also refer to... Figure 7A , Figure 7B , Figure 8A , Figure 8B as well as Figure 8C In this embodiment, the wavelength conversion module 100g and Figure 7ASimilar to the wavelength conversion module 100f, the second concave-convex structure 140g is located between the annular pattern P and the first concave-convex structure 130g, wherein the first concave-convex structure 130g is a complete annular boss, and the second concave-convex structure 140g includes multiple separate turbulence portions 142g. The wavelength conversion module 100g of this embodiment is similar to... Figure 7A The difference between the wavelength conversion module 100g and the original wavelength conversion module 100f is that, in this embodiment, the wavelength conversion module 100g further includes a filler 175, while the receiving groove 124g includes a support portion 125g and a sidewall portion 127g. The support portion 125g includes a filling groove T, which is recessed into the bearing surface S1 of the support portion 125g, and the filler 175 fills the filling groove T. The light-transmitting plate 150 is disposed in the receiving groove 124g and fixed on the support portion 125g, and the light-transmitting plate 150 completely covers the first balancing hole 122g and the filler 175.

[0098] Furthermore, please also refer to Figure 8B as well as Figure 8C The wavelength conversion module 100g in this embodiment also includes a balancing boss 129g, located on the surface S2 of the substrate 120g and integrally formed with the substrate 120g, the first uneven structure 130g, and the second uneven structure 140g. The balancing boss 129g and the second balancing hole 126g are located on both sides of the center C of the substrate 120g, respectively. Furthermore, please also refer to... Figure 8B as well as Figure 8D In this embodiment, the substrate 120g has surfaces S2 and S3 that are opposite to each other. The substrate 120g also includes a groove 128g located on surface S3. The groove 128g is recessed relative to surface S3 and its position on the substrate 120g corresponds to the balancing boss 129g located on surface S2. The groove 128g is located radially between the first concave-convex structure 130g and the center C of the substrate 120g, and the groove 128g and the second balancing hole 126g are located on opposite sides of the center C. Furthermore, the wavelength conversion module 100g of this embodiment also includes a filler 179 disposed within the groove 128g. In other words, in addition to the first balancing hole 122g and the second balancing hole 126g, the wavelength conversion module 100g of this embodiment also has a filler groove T, a groove 128g, and a balancing boss 129g, which can effectively achieve balance correction. Furthermore, the position of filler 175 is closer to the outer ring area of ​​the substrate than that of filler 170, and the correction effect per unit weight of filler material is higher when it is filled to the inner ring area.

[0099] In summary, the embodiments of the present invention have at least one of the following advantages or effects. In the design of the wavelength conversion module of the present invention, the substrate is a metal substrate, and the substrate, the first concave-convex structure, and the second concave-convex structure are integrally formed. The substrate has a first balancing hole and a receiving groove, wherein the first balancing hole is located in the receiving groove and penetrates the substrate, and the light-transmitting plate covers the first balancing hole and is arranged in a ring pattern with the wavelength conversion layer. This achieves both balance correction and heat dissipation simultaneously, eliminating the need for the metal counterweight ring configured through a bonding process as in the prior art. Therefore, it effectively reduces process steps, lowers production costs, and improves structural reliability. Furthermore, the projection device using the wavelength conversion module of the present invention has higher reliability and a longer service life, thereby enhancing product competitiveness.

[0100] The above description is merely a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. Any simple equivalent changes and modifications made in accordance with the claims and specification of the present invention are still within the scope of this patent. Furthermore, no embodiment or claim of the present invention needs to achieve all the objectives, advantages, or features disclosed in the present invention. In addition, the abstract and title of the invention are only used to assist in patent document retrieval and are not intended to limit the scope of the invention. Moreover, the terms "first," "second," etc., mentioned in this specification or claims are only used to name elements or 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 module, characterized in that, The wavelength conversion module includes a driving component, a substrate, a light-transmitting plate, and a wavelength conversion layer, wherein... The driving component is connected to the substrate and drives the substrate to rotate about the center of the substrate; The substrate is a metal substrate and includes a first convex-concave structure and a second convex-concave structure. The substrate, the first convex-concave structure, and the second convex-concave structure are integrally formed and made of the same metal material. The first convex-concave structure and the second convex-concave structure are arranged around the center of the substrate. The second convex-concave structure surrounds the first convex-concave structure. The substrate has a first balancing hole and a receiving groove. The first convex-concave structure is located in the radial direction of the substrate between the receiving groove and the center. The first balancing hole is located in the receiving groove and penetrates the substrate. The light-transmitting plate is disposed in the receiving groove of the substrate and covers the first balancing hole; and The wavelength conversion layer is disposed on the substrate and arranged in a ring pattern with the light-transmitting plate.

2. The wavelength conversion module according to claim 1, characterized in that, The substrate also has a second balancing hole, which is located radially on the substrate between the first convex-concave structure and the center and penetrates the substrate, and the drive assembly connected to the substrate covers the second balancing hole.

3. The wavelength conversion module according to claim 2, characterized in that, The substrate further includes a groove located radially between the first concave-convex structure and the center, and the groove and the second balancing hole are located on opposite sides of the center.

4. The wavelength conversion module according to claim 2, characterized in that, The first line connecting the center of the first balancing hole and the center of the substrate is perpendicular to the second line connecting the center of the second balancing hole and the center of the substrate.

5. The wavelength conversion module according to claim 1, characterized in that, The second concave-convex structure is located between the annular pattern and the first concave-convex structure.

6. The wavelength conversion module according to claim 5, characterized in that, The first concave-convex structure is a complete annular boss, while the second concave-convex structure includes multiple flow-disrupting parts that are separated from each other.

7. The wavelength conversion module according to claim 5, characterized in that, The first concave-convex structure includes a plurality of protrusions arranged adjacent to each other, while the second concave-convex structure includes a plurality of turbulence portions separated from each other.

8. The wavelength conversion module according to claim 1, characterized in that, The annular pattern is located between the second concave-convex structure and the first concave-convex structure.

9. The wavelength conversion module according to claim 8, characterized in that, The first concave-convex structure includes a plurality of protrusions arranged adjacent to each other, while the second concave-convex structure includes a plurality of turbulence portions separated from each other, and at least one of the first concave-convex structure and the second concave-convex structure contacts the wavelength conversion layer.

10. The wavelength conversion module according to claim 9, characterized in that, The first extending direction of any one of the plurality of protrusions and the second extending direction of the corresponding spoiler form a V-shape with each other.

11. The wavelength conversion module according to claim 8, characterized in that, The first concave-convex structure includes a complete annular boss and a plurality of extended boss portions separated from each other. One end of each of the plurality of extended boss portions is connected to the annular boss and extends radially from the annular boss toward the second concave-convex structure, while the second concave-convex structure includes a plurality of turbulence portions separated from each other.

12. The wavelength conversion module according to claim 11, characterized in that, At least one of the plurality of extended bosses and the plurality of turbulence portions extends into the wavelength conversion layer to form a first radial width, and the first radial width is greater than 1 / 10 of the second radial width of the wavelength conversion layer on the substrate and less than 1 / 2 of the second radial width of the wavelength conversion layer.

13. The wavelength conversion module according to claim 8, characterized in that, The substrate further includes: The third concave-convex structure is integrally formed with the substrate, the first concave-convex structure and the second concave-convex structure, and the third concave-convex structure is arranged around the center of the substrate and located between the second concave-convex structure and the first concave-convex structure, and the annular pattern is located between the second concave-convex structure and the third concave-convex structure.

14. The wavelength conversion module according to claim 13, characterized in that, The first concave-convex structure is a complete annular boss, while the second concave-convex structure and the third concave-convex structure each include multiple flow-disrupting parts that are separated from each other.

15. The wavelength conversion module according to claim 14, characterized in that, The outer and inner sides of the wavelength conversion layer are partially covered by the plurality of turbulence sections.

16. The wavelength conversion module according to claim 1, characterized in that, The receiving groove includes a support portion and a sidewall portion. The bearing surface of the support portion is recessed into the surface of the substrate, and the sidewall portion connects the surface of the substrate and the bearing surface of the support portion. The light-transmitting plate is fixed on the support portion, and the support portion surrounds at least two sides of the first balancing hole.

17. The wavelength conversion module according to claim 16, characterized in that, The wavelength conversion module also includes: The support includes a filling groove recessed into the bearing surface, the filling material is filled in the filling groove, and the light-transmitting plate is fixed to the support and covers the filling material.

18. The wavelength conversion module according to claim 16, characterized in that, The first balancing hole located in the receiving groove has a first through portion and a second through portion that are arranged adjacent to each other with different radial widths.

19. The wavelength conversion module according to claim 1, characterized in that, The wavelength conversion module also includes: A filler is disposed on the substrate, the filler being located radially on the substrate between and adjacent to the first convex-concave structure and the center.

20. The wavelength conversion module according to claim 1, characterized in that, The wavelength conversion module further includes a first adhesive layer, a second adhesive layer, and a reflective layer, wherein, The first adhesive layer is disposed between the driving component and the substrate; The second adhesive layer is disposed between the light-transmitting plate and the receiving groove; and The reflective layer is disposed between the wavelength conversion layer and the substrate.

21. A projection device, characterized in that, The projection device includes an illumination module, a light valve, and a projection lens, wherein... The lighting module provides an illumination beam and includes a light source and a wavelength conversion module. The light source device is used to provide an excitation beam; and The wavelength conversion module is disposed on the transmission path of the excitation beam, and the wavelength conversion module includes a driving component, a substrate, a light-transmitting plate, and a wavelength conversion layer; wherein, The driving component is connected to the substrate and drives the substrate to rotate about the center of the substrate; The substrate is a metal substrate and includes a first convex-concave structure and a second convex-concave structure. The substrate, the first convex-concave structure, and the second convex-concave structure are integrally formed and made of the same metal material. The first convex-concave structure and the second convex-concave structure are arranged around the center of the substrate. The second convex-concave structure surrounds the first convex-concave structure. The first convex-concave structure is located radially on the substrate between the receiving groove and the center. The first convex-concave structure is located in the receiving groove and penetrates the substrate. The light-transmitting plate is disposed in the receiving groove of the substrate and covers the first balancing hole; and The wavelength conversion layer is disposed on the substrate and arranged in a ring pattern with the light-transmitting plate, wherein the wavelength conversion layer receives the excitation beam and generates a converted beam, and the illumination beam includes the converted beam and the excitation beam; The light valve is disposed in the transmission path of the illumination beam to convert the illumination beam into an image beam; and The projection lens is positioned on the transmission path of the image beam to project the image beam out of the projection device.

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