Light source assembly and projection equipment

Abstract

The present application discloses a light source assembly and a projection device, belonging to the field of projection technology. The light source assembly includes a radiator, a laser, and a light source housing; the radiator includes a radiator body and a heat sink connected to the radiator body; the laser includes a substrate and a light-emitting unit, one side of the substrate is bonded to the heat sink, and the other side is provided with the light-emitting unit, and the substrate is fixedly connected to the light source housing or the heat sink. The present application bonds one side of the laser substrate to the heat sink in the radiator so that the heat sink can dissipate heat from the laser, and fixes the substrate to the light source housing or the heat sink, thereby eliminating the need for a laser bracket in the light source. This solves the problem of the relatively complex structure of the light source assembly in the related art and achieves the effect of simplifying the structure of the light source assembly.

Description

Technical Field

[0001] The present application relates to the field of projection technology, and in particular to a light source assembly and a projection device. Background Art

[0002] A projection device is a device that can project an image beam, and generally includes a light source component, an illumination component, and a projection lens.

[0003] A light source assembly includes a radiator, a laser, a laser bracket and a light source housing. The laser is mounted on the laser bracket, and the laser bracket is connected to the radiator and the light source housing respectively, so that the radiator can dissipate heat for the laser and the light beam emitted by the laser can be projected into the light source housing.

[0004] However, the structure of the above light source assembly is relatively complex. Summary of the Invention

[0005] The present invention provides a light source assembly and a projection device. The technical solution is as follows:

[0006] According to one aspect of the present application, a light source assembly is provided, comprising a heat sink, a laser, and a light source housing;

[0007] The radiator comprises a radiator body and a heat dissipation plate connected to the radiator body;

[0008] The laser includes a base substrate and a light emitting unit. One side of the base substrate is attached to the heat sink, and the other side is provided with the light emitting unit. The base substrate is fixedly connected to the light source housing or the heat sink.

[0009] Optionally, when the base substrate is fixedly connected to the light source housing, the light source housing has a screw hole, the base substrate has an opening, and the light source assembly further includes a first screw, which passes through the opening and is threadedly connected to the screw hole on the light source housing to fix the base substrate.

[0010] Optionally, the heat dissipation plate has a relief groove, the first screw includes a screw rod and a screw head located at one end of the screw rod, the screw rod passes through the opening and is threadedly connected to the screw hole on the light source housing, and the screw head portion is located in the relief groove.

[0011] Optionally, when the base substrate is fixedly connected to the heat sink, the heat sink has a screw hole, the base substrate has an opening, and the light source assembly further includes a second screw, which passes through the opening and is threadedly connected to the screw hole on the heat sink to fix the base substrate.

[0012] Optionally, when the base substrate is fixedly connected to the heat sink, the heat sink has a stud, the base substrate has an opening, and the light source assembly further includes a nut, the stud passes through the opening and is threadedly connected to the nut to fix the base substrate.

[0013] Optionally, the light source assembly includes at least two lasers, and the substrates of the two lasers are both attached to the heat dissipation plate.

[0014] Optionally, the heat dissipation plate has a fixing boss, and the base substrate is attached to the boss.

[0015] Optionally, the radiator further includes a heat pipe, one end of the heat pipe is connected to the radiator body, the heat dissipation plate is fitted with an outer wall of the heat pipe, and the heat pipe is a grooved composite heat pipe.

[0016] Optionally, the heat dissipation plate is fixedly connected to the light source housing.

[0017] According to another aspect of the present application, a projection device is provided, comprising the above-mentioned light source assembly.

[0018] The beneficial effects of the technical solutions provided in the embodiments of the present application include at least:

[0019] By attaching one side of the laser's base substrate to the heat sink in the radiator, the heat sink can dissipate heat from the laser. The base substrate is then fixedly connected to the light source housing or the heat sink. In other words, the light source assembly secures the laser to other functional structures, eliminating the need for a separate laser bracket. This solves the problem of complex light source assembly structures in related technologies and simplifies the structure of the light source assembly.

[0020] In addition, since the light source assembly does not require a laser bracket, the difficulty of assembling the light source assembly is reduced, and it is conducive to the miniaturization of the light source assembly and the projection equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 This is a structural diagram of a light source assembly shown in an embodiment of the present application;

[0023] Figure 2This is a schematic diagram of the exploded structure of another light source assembly provided in an embodiment of the present application;

[0024] Figure 3 yes Figure 2 The structure diagram of the light source assembly shown is from another angle;

[0025] Figure 4 yes Figure 2 A structural schematic diagram of the light source assembly from another angle is shown;

[0026] Figure 5 is a structural diagram of another light source assembly provided in an embodiment of the present application;

[0027] Figure 6 yes Figure 5 The structure diagram of the light source assembly shown is from another angle;

[0028] Figure 7 yes Figure 5 Another structural schematic diagram of the light source assembly shown;

[0029] Figure 8 It is a structural schematic diagram of a projection device provided in an embodiment of the present application.

[0030] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0032] Currently, a light source assembly typically includes a heat sink, a laser, a laser holder, and a light source housing. The laser generates a large amount of heat during operation, and the heat sink is used to dissipate the heat from the laser to prevent it from overheating and being damaged.

[0033] The laser is mounted on a laser bracket, which secures the laser between the light source housing and the heat sink, ensuring that the laser adheres to the heat sink. The light source housing has an opening, into which the laser can be secured, allowing light from the laser to enter the light source housing. The light source housing can contain multiple optical components (such as lenses and reflectors) for adjusting the light emitted by the laser.

[0034] Among them, the radiator may include a radiator body, a heat pipe and a heat sink. One end of the heat pipe is connected to the radiator body, and the other end is fixed to the heat sink. The heat sink is attached to the laser to absorb the heat generated when the laser is running. The heat pipe is used to transfer the heat absorbed by the heat sink to the radiator body. The radiator body can dissipate the heat transferred by the heat pipe through air cooling or liquid cooling, so as to achieve continuous heat dissipation of the laser.

[0035] The structure of the above-mentioned light source assembly is relatively complex and difficult to assemble. In addition, for small lasers, the package shape is very compact, and there is very little space left on the laser for assembly and fixation. Due to insufficient space, the laser bracket can often only be supported and fixed by point contact, which has poor accuracy. This may cause the light output direction of the laser to deviate. For a single laser, even if there is a deviation, the optical lens can be adjusted to compensate for the deviation. However, if there are multiple lasers in the light source assembly, it is difficult to compensate for the multiple lasers separately, resulting in poor parallelism of the light output directions of the multiple lasers, and thus the performance of the light source assembly will also be poor.

[0036] The embodiments of the present application provide a light source assembly and a projection device, which can solve some problems existing in the above-mentioned related technologies.

[0037] Figure 1 1 is a schematic diagram of the structure of a light source assembly according to an embodiment of the present application. The light source assembly 10 includes:

[0038] The heat sink 11 , the laser 12 and the light source housing 13 .

[0039] The heat sink 11 includes a heat sink body 111 and a heat sink plate 112 connected to the heat sink body 111 .

[0040] The laser 12 includes a base substrate 121 and a light emitting unit 122 . One side of the base substrate 121 is attached to the heat sink 112 , and the other side is provided with the light emitting unit 122 . The base substrate 121 is fixedly connected to the light source housing 13 or the heat sink 112 .

[0041] The light emitting unit 122 may include at least one laser chip, and the base substrate 121 may include a connection line for connecting to the laser chip to drive the laser chip to emit light.

[0042] In summary, the light source assembly provided in the embodiments of the present application adheres one side of the laser's substrate to the heat sink in the radiator, enabling the heat sink to dissipate heat from the laser. Furthermore, the substrate is fixedly connected to the light source housing or the heat sink. In other words, the light source assembly secures the laser to other functional structures, eliminating the need for a separate laser bracket. This solves the problem of the relatively complex structure of light source assemblies in related technologies and simplifies the structure of the light source assembly.

[0043] In addition, since the light source assembly does not require a laser bracket, the difficulty of assembling the light source assembly is reduced, and it is conducive to the miniaturization of the light source assembly and the projection equipment.

[0044] As can be seen from the above, the heat sink and laser in the light source assembly provided in the embodiments of this application have two configurations: one in which the substrate in the laser is fixedly connected to the light source housing, and the other in which the substrate in the laser is fixedly connected to the heat sink. These two configurations are described below.

[0045] Figure 2 This is a schematic diagram of the exploded structure of another light source assembly provided in an embodiment of the present application. Figure 3 yes Figure 2 The structure diagram of the light source assembly shown is from another angle. Figure 3 FIG. 1 shows a schematic structural diagram of the laser 12 when it is installed on a heat sink.

[0046] Please refer to Figure 2 and Figure 3 The heat sink 112 has a screw hole k1, and the base substrate 121 has an opening k2. The light source assembly also includes a second screw 14, which passes through the opening k2 and is threadedly connected to the screw hole k1 on the heat sink 112 to secure the base substrate 121. This fixing method can firmly fix the laser to the heat sink. The base substrate 121 of the laser can be in surface contact with the heat sink 112, which has high precision and facilitates the control of the laser light output direction.

[0047] In addition, a thermal interface material (TIM), such as thermal paste, may be coated between the heat sink 112 and the base substrate 121 of the laser 12 to enhance the heat dissipation effect of the laser.

[0048] Thermal paste is an organic grease made for heat transfer in electronic components. It can be made of a compound of metal oxides with good thermal conductivity and insulation and organic silicone. It has good thermal conductivity, electrical insulation, shock absorption and impact resistance.

[0049] In an exemplary embodiment, the light source assembly includes at least two lasers 12, and the substrates 121 of the two lasers 12 are both bonded to the heat sink 112. The heat sink 112 can have a relatively flat surface, and the substrates 121 of the two lasers 12 can both be bonded to the relatively flat surface. This results in a relatively high degree of parallelism in the light emission directions of the at least two lasers 12, and thus enhances the performance of the light source assembly. Figure 2 The case where the number of lasers 12 is 2 is shown, but the light source assembly provided in the embodiment of the present application may also include more lasers, such as 3, 4, 5, 6, 7, 8, etc.

[0050] In an exemplary embodiment, the base substrate 121 may be rectangular, the number of the openings k2 may be 2, and the two openings k2 may be respectively located at the edges of two opposite sides of the base substrate 121 . Figure 2 and Figure 3 The figure shows a case where the number of lasers 12 is two. Correspondingly, four second screws 14 are used to fix the two lasers 12 on the heat sink 112 respectively.

[0051] Optionally, the heat sink 112 has a fixed boss t, and the base substrate 121 is bonded to the boss t. The boss t is a raised platform on the heat sink 112, which can be formed by a stamping process. The boss can have a table with a high flatness, and the base substrate 121 can be bonded to the table with a high flatness. Compared with manufacturing a heat sink with a high overall flatness, it is less difficult to manufacture a boss with a high flatness. Therefore, providing a boss on the heat sink and bonding the base substrate of the laser to the table of the boss can reduce the manufacturing difficulty of the heat sink and improve the parallelism of the output light of multiple lasers.

[0052] Optionally, the radiator 11 further includes a heat pipe 113 , one end of the heat pipe 113 is connected to the radiator body 111 , and the heat dissipation plate 112 is in contact with an outer wall of the heat pipe 113 to absorb heat from the heat dissipation plate 112 .

[0053] A heat pipe is a heat transfer element that transfers heat by changing the phase of its internal working fluid. In this embodiment, the heat pipe 113 absorbs heat from the heat sink 112 and transfers it to the radiator body 111, where it is dissipated.

[0054] Heat pipe 113 can be a grooved composite heat pipe, which has a strong heat transfer effect and can improve the heat dissipation effect of the laser. In addition, grooved composite heat pipes can improve the capillary suction of the raw material by increasing the number of groove teeth and improving the stacked capillary structure. This gives the grooved composite heat pipe a higher porosity and a higher fluid return rate, improving heat pipe efficiency. The maximum heat transfer capacity of low-tooth composite heat pipes can be increased from 40-45 watts to 55 watts.

[0055] Of course, the heat pipe 113 may also be a powder sintered heat pipe or other types of composite heat pipes, which is not limited in this embodiment of the present application.

[0056] Optionally, the heat dissipation plate 112 is fixedly connected to the light source housing 13. The heat dissipation plate 112 can be fixedly connected to the light source housing 13 in a variety of ways. For example, Figure 4 yes Figure 2 Please refer to the schematic diagram of the structure of the light source assembly from another angle. Figure 2 and Figure 4 The light source assembly further includes a fixing screw d, a through-hole k3 on the heat sink, and a protrusion g on the light source housing 13. The protrusion g has a screw hole therein. The fixing screw d can pass through the through-hole k3 on the heat sink and form a threaded connection with the screw hole in the protrusion g to secure the heat sink 112 to the light source housing 13. Of course, the heat sink 112 can also be connected to the light source housing in other ways, and this embodiment of the application is not limited thereto.

[0057] Please refer to Figure 2 and Figure 3 In an exemplary embodiment, the heat sink 121 further includes a stopper protrusion x1, and the laser substrate 121 includes a stopper through-hole k4 corresponding to the stopper protrusion x1. When the laser substrate 121 is secured to the heat sink 121, the stopper protrusion x1 on the heat sink 121 can penetrate into the stopper through-hole k4 on the laser substrate 121. The stopper protrusion x1 and the stopper through-hole k4 serve as stoppers during laser installation, reducing the difficulty of laser installation and improving laser installation accuracy, thereby enhancing the light output quality of the light source assembly. Figure 2 and Figure 3 It is shown that the base substrate 121 of each laser has two limiting through holes k4, and the heat sink 121 has four limiting protrusions x1 corresponding to the base substrates of the two lasers. Of course, the number of limiting protrusions and limiting through holes can also be other, and this embodiment of the application does not limit this. Figure 2 and Figure 3 In the light source assembly shown, the base substrate 121 of the laser may be rectangular, and the limiting through hole k4 may be located at the edges of two opposite sides of the base substrate 121 to reserve a larger installation space for the light-emitting unit.

[0058] For the heat dissipation plate 112 provided with a boss t, the limiting protrusion x1 may be located on the boss t.

[0059] It should be noted that Figure 2 and Figure 3 The figure shows a situation where two light-emitting units 122 are provided on the base substrate 121 in each laser 12, but each laser 12 may also include more light-emitting units 122, which is not described in detail in the embodiment of the present application.

[0060] Figure 2 and Figure 3 What is shown is a structure in which a laser is fixed to a heat sink. The laser can also be fixed to the heat sink in other ways. In an exemplary embodiment, the heat sink may have a stud, and the base substrate of the laser has an opening. The light source assembly also includes a nut, and the stud passes through the opening and is threadedly connected to the nut to fix the base substrate.

[0061] In an exemplary embodiment, please refer to Figure 4 The radiator 11 in the light source assembly also includes a heat dissipation cover plate 114. One end of the heat pipe 113 is located in the radiator body 111, and the other end passes between the heat dissipation cover plate 114 and the heat dissipation plate 112, and is exposed outside the heat dissipation cover plate 114 and the heat dissipation plate 112. The heat dissipation cover plate 114 and the heat dissipation plate 112 are respectively located on both sides of the heat pipe 113, clamping the heat pipe 113. The heat dissipation cover plate 114 can be fixedly connected to the heat dissipation plate 112 to protect the heat pipe 113 and prevent the heat pipe from being damaged by other structures. Of course, the light source assembly provided in the embodiment of the present application may also not include the heat dissipation cover plate 114, which can further simplify the structure of the radiator and the light source assembly and reduce the cost of the radiator and the light source assembly.

[0062] It should be noted that in the light source assembly provided in the embodiment of the present application, the number of heat pipes in the radiator may be at least one. Figure 4 In the light source assembly shown, the number of heat pipes is 4, but the number of heat pipes can also be other numbers, such as 2, 3, 5, 6 or more, which is not limited in the embodiment of the present application.

[0063] In an exemplary embodiment, please refer to Figure 2 The heat dissipation body 111 of the radiator may include an air-cooled radiator, which may include a fan ( Figure 2The heat pipe 113 may be provided with a plurality of spaced-apart sheet-like structures (not shown) and a fin structure p. The fin structure p may include a plurality of spaced-apart sheet-like structures to increase the heat exchange surface area. The heat generated by the heat pipe 113 may be dissipated into the fin structure p to heat the air contained therein. The air outlet or air inlet of the fan may be directed toward the fin structure p to blow or draw away the heated air contained therein, thereby achieving continuous heat dissipation of the heat pipe 113.

[0064] Of course, the heat dissipation body 111 of the radiator may also include other types of radiators, such as a water-cooled radiator, etc., and the embodiment of the present application is not limited to this.

[0065] In summary, the light source assembly provided in the embodiments of the present application adheres one side of the laser's substrate to the heat sink in the radiator, enabling the heat sink to dissipate heat from the laser. Furthermore, the substrate is fixedly connected to the light source housing or the heat sink. In other words, the light source assembly secures the laser to other functional structures, eliminating the need for a separate laser bracket. This solves the problem of the relatively complex structure of light source assemblies in related technologies and simplifies the structure of the light source assembly.

[0066] In addition, since the light source assembly does not require a laser bracket, the difficulty of assembling the light source assembly is reduced, and since the structure of the light source assembly is simplified, it is conducive to the miniaturization of the light source assembly and the projection device.

[0067] In addition, the light source assembly fixes the substrates of multiple lasers in the light source assembly on a boss with higher flatness on the heat sink, so that the parallelism of the output light of these multiple lasers is higher, thereby improving the light output quality of the light source assembly.

[0068] Figure 5 It is a structural schematic diagram of another light source assembly provided in an embodiment of the present application. Figure 6 yes Figure 5 The structure diagram of the light source assembly shown is from another angle. Figure 5 The structure diagram of the laser mounted on the light source housing is shown. The light source housing 13 has screw holes ( Figure 5 and Figure 6 The base substrate 121 has an opening ( Figure 5 and Figure 6 The light source assembly further includes a first screw 15, which passes through the opening and is threadedly connected to the screw hole on the light source housing to fix the substrate 121 in the laser. The first screw 15 includes a screw rod ( Figure 5 and Figure 6The screw rod is threaded through the opening and connected to the screw hole on the light source housing 13. The laser substrate 121 and the heat sink 112 can be in surface contact, which has high precision and is convenient for controlling the light emission direction of the laser.

[0069] Depend on Figure 5 It can be seen that the screw head 151 of the first screw 15 has a certain protrusion on the back side of the base substrate 121. This protrusion will have a certain impact on the adhesion between the base substrate 121 and the heat sink 112. For example, it may make it difficult for the base substrate 121 to adhere to the heat sink 112, or reduce the adhesion area between the base substrate 121 and the heat sink, which is not conducive to heat dissipation of the laser. In this regard, in an exemplary embodiment, as Figure 6 As shown, the heat sink 112 has a clearance groove c, and the screw head portion can be located in the clearance groove c. The clearance groove c can serve as a clearance structure, allowing the laser substrate 121 to fit more closely with the heat sink 112 without reducing the contact area between the laser substrate 121 and the heat sink 112, thereby avoiding affecting the heat dissipation effect of the laser.

[0070] Figure 5 and Figure 6 The figure shows a situation where the light source assembly includes two lasers, and four first screws respectively fix the two lasers on the light source housing 13 . Correspondingly, the number of the clearance grooves c is also four to avoid the four first screws 15 .

[0071] In addition, a thermal interface material, such as thermal paste, may be coated between the heat sink 112 and the base substrate 121 of the laser 12 to enhance the heat dissipation effect of the laser.

[0072] Thermal paste is an organic grease made for heat transfer in electronic components. It can be made of a compound of metal oxides with good thermal conductivity and insulation and organic silicone. It has good thermal conductivity, electrical insulation, shock absorption and impact resistance.

[0073] In an exemplary embodiment, the light source assembly includes at least two lasers 12, and the substrates 121 of the two lasers 12 are both bonded to the heat sink 112. The heat sink 112 can have a relatively flat surface, and the substrates 121 of the two lasers 12 can both be bonded to the relatively flat surface. This results in a relatively high degree of parallelism in the light emission directions of the at least two lasers 12, and thus enhances the performance of the light source assembly. Figure 5 The case where the number of lasers 12 is 2 is shown, but the light source assembly provided in the embodiment of the present application may also include more lasers, such as 3, 4, 5, 6, 7, 8, etc.

[0074] like Figure 6 As shown, the heat sink 112 has a fixed boss t, and the base substrate 121 is bonded to the boss t. The boss t is a raised platform on the heat sink 112, which can be formed by a stamping process. The boss can have a table with a high flatness, and the base substrate can be bonded to the table with a high flatness. Compared with manufacturing a heat sink with a high overall flatness, it is less difficult to manufacture a boss with a high flatness. Therefore, providing a boss on the heat sink and bonding the base substrate of the laser to the table of the boss can reduce the difficulty of manufacturing the heat sink and improve the parallelism of the output light of multiple lasers. Optionally, the clearance groove c on the heat sink 112 can be located on the boss t.

[0075] Optionally, the radiator 11 further includes a heat pipe 113 , one end of the heat pipe 113 is connected to the radiator body 111 , and the heat dissipation plate 112 is in contact with an outer wall of the heat pipe 113 to absorb heat from the heat dissipation plate 112 .

[0076] A heat pipe is a heat transfer element that transfers heat by changing the phase of its internal working fluid. In this embodiment, the heat pipe 113 absorbs heat from the heat sink 112 and transfers it to the radiator body 111, where it is dissipated.

[0077] Heat pipe 113 can be a low-tooth composite heat pipe, which has a stronger heat transfer effect and can improve the heat dissipation effect of the laser. In addition, the heat transfer effect of the heat pipe can be adjusted by adjusting the number of teeth in the low-tooth composite heat pipe. Of course, heat pipe 113 can also be a powder sintered heat pipe or a composite heat pipe, which is not limited in this embodiment of the application.

[0078] Optionally, the heat sink 112 is fixedly connected to the light source housing 13. The heat sink 112 can be fixedly connected to the light source housing 13 in a variety of ways. For example, the light source assembly further includes a fixing screw d. The heat sink has a through hole k3, and the light source housing 13 has a protrusion g with a screw hole therein. The fixing screw d can pass through the through hole k3 on the heat sink and form a threaded connection with the screw hole in the protrusion g to fix the heat sink 112 to the light source housing 13. Of course, the heat sink 112 can also be connected to the light source housing in other ways, and this embodiment of the application is not limited thereto.

[0079] In an exemplary embodiment, Figure 5As shown, the light source housing 13 also has a limiting protrusion x2, and the laser substrate 121 has a limiting through-hole corresponding to the limiting protrusion x2. When the laser is fixed to the light source housing, the limiting protrusion x2 on the light source housing 13 can penetrate the limiting through-hole on the laser substrate 121. The limiting protrusion x2 and the limiting through-hole are used to limit the laser during installation, which can reduce the difficulty of laser installation and improve the installation accuracy of the laser, thereby improving the light output quality of the light source assembly.

[0080] In an exemplary embodiment, please refer to Figure 5 The radiator 11 in the light source assembly also includes a heat dissipation cover plate 114. One end of the heat pipe 113 is located in the radiator body 111, and the other end passes between the heat dissipation cover plate 114 and the heat dissipation plate 112, and is exposed outside the heat dissipation cover plate 114 and the heat dissipation plate 112. The heat dissipation cover plate 114 and the heat dissipation plate 112 are respectively located on both sides of the heat pipe 113, clamping the heat pipe 113. The heat dissipation cover plate 114 can be fixedly connected to the heat dissipation plate 112 to protect the heat pipe 113 and prevent the heat pipe from being damaged by other structures. Of course, the light source assembly provided in the embodiment of the present application may also not include the heat dissipation cover plate 114, which can further simplify the structure of the radiator and the light source assembly and reduce the cost of the radiator and the light source assembly.

[0081] It should be noted that in the light source assembly provided in the embodiment of the present application, the number of heat pipes in the radiator may be at least one. Figure 5 In the light source assembly shown, the number of heat pipes is 4, but the number of heat pipes can also be other numbers, such as 2, 3, 5, 6 or more, which is not limited in the embodiment of the present application.

[0082] In an exemplary embodiment, please refer to Figure 5 The heat dissipation body 111 of the radiator may include an air-cooled radiator, which may include a fan ( Figure 5 The heat pipe 113 may be provided with a plurality of spaced-apart sheet-like structures (not shown) and a fin structure p. The fin structure p may include a plurality of spaced-apart sheet-like structures to increase the heat exchange surface area. The heat generated by the heat pipe 113 may be dissipated into the fin structure p to heat the air contained therein. The air outlet or air inlet of the fan may be directed toward the fin structure p to blow or draw away the heated air contained therein, thereby achieving continuous heat dissipation of the heat pipe 113.

[0083] Of course, the heat dissipation body 111 of the radiator may also include other types of radiators, such as a water-cooled radiator, etc., and the embodiment of the present application is not limited to this.

[0084] Figure 7 yes Figure 5 Another structural schematic diagram of the light source assembly shown in FIG. Figure 7The figure shows a schematic structural diagram of the heat sink 112 , the laser 12 and the light source housing 13 when they are assembled together. The laser 12 is located between the heat sink 112 and the light source housing 13 , and the heat sink 112 is fixedly connected to the light source housing 13 .

[0085] In summary, the light source assembly provided in the embodiments of the present application adheres one side of the laser's substrate to the heat sink in the radiator, enabling the heat sink to dissipate heat from the laser. Furthermore, the substrate is fixedly connected to the light source housing or the heat sink. In other words, the light source assembly secures the laser to other functional structures, eliminating the need for a separate laser bracket. This solves the problem of the relatively complex structure of light source assemblies in related technologies and simplifies the structure of the light source assembly.

[0086] In addition, since the light source assembly does not require a laser bracket, the difficulty of assembling the light source assembly is reduced, and since the structure of the light source assembly is simplified, it is conducive to the miniaturization of the light source assembly and the projection device.

[0087] In addition, the light source assembly fixes the substrates of multiple lasers in the light source assembly on a boss with higher flatness on the heat sink, so that the parallelism of the output light of these multiple lasers is higher, thereby improving the light output quality of the light source assembly.

[0088] Figure 7 1 is a structural block diagram of a projection device according to an embodiment of the present application. The projection device includes a light source assembly 10, an illumination assembly 20 and a projection lens 30.

[0089] The light source assembly 10 is used to provide various colored lights to the light engine 20. The light source assembly 10 can be any of the light source assemblies provided in the above embodiments.

[0090] The illumination assembly 20 processes the colored light to produce an image beam. The illumination assembly may include the drive circuits, control components, and light valve components found in projection equipment. The drive circuits may include laser drive circuits, fluorescent wheel drive circuits, and other circuits; the control components may include a display panel. The light valve assembly may include structures such as digital micromirror devices (DMDs) and galvanometers.

[0091] The projection lens 30 is used to adjust the image beam and project the adjusted image beam out of the projection device.

[0092] The projection lens 30 may include any one of the projection lenses provided in the above embodiments.

[0093] In summary, the projection device provided in the embodiments of the present application adheres one side of the substrate of the laser in the light source assembly to the heat sink in the radiator so that the heat sink can dissipate heat from the laser. Furthermore, the substrate is fixedly connected to the light source housing or the heat sink. In other words, the light source assembly fixes the laser to other functional structures, eliminating the need for a separate laser bracket for the laser. This solves the problem of the relatively complex structure of the light source assembly in the related art and achieves the effect of simplifying the structure of the light source assembly.

[0094] In addition, since the light source assembly does not require a laser bracket, the difficulty of assembling the light source assembly is reduced, and since the structure of the light source assembly is simplified, it is conducive to the miniaturization of the projection device.

[0095] In addition, the light source assembly fixes the substrates of multiple lasers in the light source assembly on a boss with high flatness on the heat sink, so that the parallelism of the output light of these multiple lasers is high, thereby improving the projection quality of the projection device.

[0096] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.

[0097] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A light source assembly, characterized in that: The light source assembly includes a radiator, a laser and a light source housing; The radiator comprises a radiator body and a heat dissipation plate connected to the radiator body; The laser comprises a base substrate and a light emitting unit, one side of the base substrate is attached to the heat sink, and the other side is provided with the light emitting unit, and the base substrate is fixedly connected to the light source housing or the heat sink; The light source assembly includes at least two lasers, and the substrates of the two lasers are both attached to the heat dissipation plate; The heat sink further has a limiting protrusion, and the base substrate of the laser has a limiting through hole corresponding to the limiting protrusion. When the base substrate of the laser is fixed to the heat sink, the limiting protrusion on the heat sink can penetrate into the limiting through hole on the base substrate of the laser. The light source assembly further includes: a fixing screw, the heat sink having a through hole, the light source housing having a protrusion, the protrusion having a screw hole, the fixing screw passing through the through hole on the heat sink and forming a threaded connection with the screw hole in the protrusion to fix the heat sink to the light source housing; When the substrate base is fixedly connected to the light source housing, the light source housing has a screw hole, the substrate base has an opening, and the light source assembly further includes a first screw, which passes through the opening and is threadedly connected to the screw hole on the light source housing to fix the substrate base; the heat dissipation plate has a recess, the first screw includes a screw rod and a screw head located at one end of the screw rod, the screw passes through the opening and is threadedly connected to the screw hole on the light source housing, and the screw head portion is located in the recess; or, When the base substrate is fixedly connected to the heat sink, the heat sink has a screw hole, the base substrate has an opening, and the light source assembly further includes a second screw, which passes through the opening and is threadedly connected to the screw hole on the heat sink to fix the base substrate; or, the heat sink has a stud, the base substrate has an opening, and the light source assembly further includes a nut, which passes through the opening and is threadedly connected to the nut to fix the base substrate.

2. The light source assembly according to claim 1, wherein: The heat dissipation plate has a fixing boss, and the base substrate is attached to the boss.

3. The light source assembly according to claim 1, wherein: The radiator further comprises a heat pipe, one end of which is connected to the radiator body, the heat dissipation plate is fitted with the outer wall of the heat pipe, and the heat pipe is a grooved composite heat pipe.

4. A projection device, characterized in that: The projection device comprises the light source assembly according to any one of claims 1-3.

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