Projection light machine and projection device

Abstract

The application provides a projection light machine and a projection device, and relates to the technical field of projection. The projection light machine comprises a mainboard, a mounting bracket, a light machine module, at least one fan and a heat dissipation assembly. The heat dissipation assembly is arranged on the side of the light source module away from the light funnel, and is used for dissipating heat of the light source module. The heat dissipation assembly is arranged on one side of the light funnel, and the air outlet of the first fan faces the heat dissipation assembly, so that the heat dissipation effect and structural compactness of the projection light machine are improved. Meanwhile, the mainboard, the light machine module, the first fan and the heat dissipation assembly are all mounted on the mounting bracket. Compared with the related prior art, the projection light machine provided in the application can cancel the fan mounting box and other components, which is beneficial to reducing the number of parts, reducing the volume of the projection light machine and improving the structural compactness.

Description

Technical Field

[0001] This application relates to the field of projection technology, and in particular to a projection optical engine and projection device. Background Technology

[0002] The projection optical engine is the core of the projection equipment's optical imaging, used to convert light emitted from a light source into a projectable image. During operation, the optical components of the projection optical engine generate a large amount of heat. If this heat is not dissipated in time, it may damage the optical components and affect the lifespan of the projection optical engine.

[0003] In related technologies, to solve the heat dissipation problem of optical components, a cooling fan and a fan mounting box are usually installed inside the projection optical engine, but these have the problems of large size or unsatisfactory heat dissipation effect. Utility Model Content

[0004] This application provides a projection optical engine and projection device, aiming to solve at least one of the above-mentioned problems in existing projection optical engines.

[0005] To achieve the above objectives, according to a first aspect of this application, a projection optical engine is provided, including a motherboard, a mounting bracket, an optical engine module, at least one fan, and a heat dissipation component; The motherboard is electrically connected to the optical engine module and is used to control the operation of the optical engine module; The optomechanical module includes a light source module and a light funnel disposed on one side of the light source module; The heat dissipation component is at least partially disposed on the side of the light source module away from the light funnel, and the heat dissipation component is used to dissipate heat from the light source module; The at least one fan includes a first fan, which is located near the light funnel and disposed on one side of the light funnel, with the air outlet of the first fan facing the heat dissipation component. The motherboard, the optical engine module, the first fan, and the heat dissipation component are all mounted on the mounting bracket.

[0006] In some embodiments, the at least one fan further includes a second fan, which is arranged side by side with the first fan on the mounting bracket, and the air outlet of the second fan faces the heat dissipation assembly; And / or, the projection optical engine further includes an air duct that connects the air outlet of the fan and the air inlet of the heat dissipation component.

[0007] In some embodiments, the heat dissipation assembly includes a heat-conducting element, at least one finned heat sink, and a heat pipe; the heat-conducting element, the finned heat sink, and the heat pipe are thermally connected; the heat-conducting element is disposed on the side of the light source module away from the light funnel, the light source module is mounted on the heat-conducting element and is thermally connected to the heat-conducting element; the air duct connects the air outlet of the fan and the air inlet of the finned heat sink.

[0008] In some embodiments, at least one snap-in fin heat sink includes a first snap-in fin heat sink, the first snap-in fin heat sink having a stepped portion on the side facing the air outlet, and the projection optical engine further includes an air duct, the end of the air duct opposite to the fan being sleeved on the stepped portion.

[0009] In some embodiments, the heat-conducting element is a heat-conducting plate, and the heat dissipation assembly further includes a second fin heat sink and a third fin heat sink. The first fin heat sink is disposed at the bottom of the heat-conducting plate, and the heat-conducting plate is disposed between the second fin heat sink and the third fin heat sink. The heat pipe passes through the first fin heat sink, the second fin heat sink, the third fin heat sink, and the heat-conducting plate. Alternatively, the heat-conducting component is a profile heat sink, the light source module is mounted on the profile heat sink and is thermally connected to the profile heat sink; the profile heat sink, the first fin heat sink, and the heat pipe are thermally connected.

[0010] In some embodiments, the second fin heat sink and / or the third fin heat sink protrudes from the first fin heat sink at one end near the light funnel; Alternatively, the profile heat sink includes a substrate and at least one heat dissipation part disposed on the substrate, the light source module is mounted on the substrate and is thermally connected to the substrate; at least a portion of the heat dissipation part protrudes from the first fin heat sink near the light funnel.

[0011] In some embodiments, the fin heat sink includes a plurality of stacked heat sink sub-plates, the heat pipe is at least partially inserted into the fin heat sink, and each heat sink sub-plate is thermally connected to the heat pipe. And / or, the heat pipe is in a straight line or a U-shape.

[0012] In some embodiments, the mounting bracket includes a first mounting surface and a second mounting surface disposed opposite to each other. The optical engine module, the fan, and the heat dissipation assembly are disposed on the first mounting surface. The optical engine module includes a main housing, and the motherboard is disposed on the second mounting surface. The air inlet of the fan is connected to the main housing and the motherboard respectively.

[0013] In some embodiments, the optomechanical module is spaced apart from the first mounting surface; And / or, the fan is spaced apart from the first mounting surface.

[0014] According to a second aspect of this application, a projection device is provided, including a projection optical engine as described above.

[0015] In the projection optical engine provided in this application embodiment, a heat dissipation component is provided on the side of the light source module away from the light funnel. This heat dissipation component is used to dissipate heat from the light source module and is located on one side of the light funnel. The air outlet of the first fan faces the heat dissipation component, thereby improving the heat dissipation effect and structural compactness of the projection optical engine. Simultaneously, the motherboard, the optical engine module, the first fan, and the heat dissipation component are all mounted on the mounting bracket. Compared with related prior art, the projection optical engine provided in this application can eliminate components such as the fan mounting box, which helps reduce the number of parts, decreases the size of the projection optical engine, and improves structural compactness.

[0016] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0018] Figure 1 This is a schematic diagram of the structure of one embodiment of the projection optical engine provided in this application; Figure 2 This is a partial structural schematic diagram of the projection optical engine provided in this application; Figure 3 This is a schematic diagram of another embodiment of the projection optical engine provided in this application; Figure 4 yes Figure 3 A schematic diagram of the cross-sectional structure of the projection optical engine at point AA; Figure 5 This is a schematic diagram of another embodiment of the heat dissipation component in this application; Figure 6 for Figure 5 A schematic diagram of the heat dissipation component assembly structure.

[0019] Explanation of reference numerals in the attached figures: 100. Optomechanical module; 110. Main casing; 111a. First cavity; 111b. First air inlet; 111c. First air outlet; 120. Optical devices; 140. First heat exchanger; 141a. Second cavity; 141b. Second air inlet; 141c. Second air outlet; 142. First heat exchange channel; 160. Second heat exchanger; 161. Second heat exchange channel; 162. Heat exchange chamber; 171. Light panel; 172. Light funnel; 200. Motherboard; 300. Install the bracket; 410. First fan; 420. Second fan; 430. Third fan; 500, Heat dissipation assembly; 510, Heat-conducting plate; 520, Heat pipe; 521, First heat pipe; 522, Second heat pipe; 5301, First fin heat sink; 5301a, Stepped portion; 5302, Second fin heat sink; 5303, Third fin heat sink; 531, Profile heat sink; 5311, Substrate; 5312, First heat dissipation section; 5313, Second heat dissipation section; 540, Clearance space; 600. Air duct. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0021] A projection optical engine is a display device that magnifies and projects images or videos onto a screen or wall, widely used in homes, offices, education, and entertainment. The core of the optical imaging in a projection device (such as a projector) is the projection optical engine, which converts light emitted from a light source into a projectable image. During operation, the optical components of the projection optical engine generate a significant amount of heat; if this heat is not dissipated in time, it can damage the optical components and shorten the lifespan of the projection optical engine.

[0022] In related technologies, to solve the heat dissipation problem of optical components, a cooling fan and a fan mounting box are usually installed inside the projection optical engine, but these have the problems of large size or unsatisfactory heat dissipation effect.

[0023] To facilitate understanding, the projection optical engine and projection device in this application will be further described below with reference to specific embodiments and accompanying drawings.

[0024] Please see Figures 1 to 6 This application provides a projection optical engine, which includes a housing (not shown), a motherboard 200, a mounting bracket 300, an optical engine module 100, at least one fan (e.g., a first fan 410), and a heat dissipation component 500; wherein the motherboard 200, the mounting bracket 300, the optical engine module 100, the at least one fan, and the heat dissipation component 500 are all disposed within the housing. The housing can protect the motherboard 200, the mounting bracket 300, the optical engine module 100, the at least one fan, and the heat dissipation component 500 located therein.

[0025] The motherboard 200 can also be understood as an electronic control board or main control board. The motherboard 200 is electrically connected to the optical engine module 100 and is used to control the operation of the optical engine module 100. It should be noted that the specific structure of the motherboard 200 is not a major improvement of this application and is not limited here.

[0026] The optomechanical module 100 includes a light source module and a light funnel 172 disposed on one side of the light source module. Exemplarily, the light source module includes a lamp panel 171, such as an LED lamp panel. The light funnel 172 is disposed on the light-emitting side of the lamp panel 171. The lamp panel 171 is mainly used to provide a light source, and the light funnel 172 is used to collect the light emitted by the lamp panel 171 and converge it to a receiving end (e.g., the light-incident side of the optical device 120, as described in detail below).

[0027] The heat dissipation component 500 is at least partially disposed on the side of the light source module away from the light funnel 172, and is used to dissipate heat from the light source module. For example, the heat dissipation component 500 includes a finned heat sink (e.g., a first at least one finned heat sink 1), and the at least one finned heat sink is used to dissipate heat from the light source module.

[0028] At least one fan includes a first fan 410, which is located near and on one side of the light funnel 172, with its outlet facing the heat dissipation assembly 500. Exemplarily, the outlet of the first fan 410 is directly opposite the heat dissipation assembly 500. Airflow is blown out through the outlet of the first fan 410 and exchanges heat with the heat dissipation assembly 500 during its flow, forming a hot airflow. The hot airflow is discharged from the projection optical engine through vents on the housing, thereby accelerating the heat dissipation effect of the heat dissipation assembly 500 and the projection optical engine.

[0029] Among them, the motherboard 200, the optical engine module 100, the first fan 410, and the heat dissipation component 500 are all mounted on the mounting bracket 300.

[0030] In the projection optical engine provided in this application embodiment, a heat dissipation component 500 is provided on the side of the light source module away from the light funnel 172. The heat dissipation component 500 is used to dissipate heat from the light source module and is located on one side of the light funnel 172. The air outlet of the first fan 410 faces the heat dissipation component 500, thereby improving the heat dissipation effect and structural compactness of the projection optical engine. At the same time, the motherboard 200, the optical engine module 100, the first fan 410, and the heat dissipation component 500 are all mounted on the mounting bracket 300. Compared with the relevant prior art, the projection optical engine provided in this application can eliminate components such as the fan mounting box, which helps to reduce the number of parts, thereby reducing the size of the projection optical engine and improving structural compactness.

[0031] In some embodiments, please continue reading Figure 1 and Figure 2 The projection optical engine includes multiple fans, including a first fan 410 and a second fan 420. The second fan 420 and the first fan 410 are arranged side by side on the mounting bracket 300. The air outlet of the second fan 420 faces the heat dissipation component 500. It can also be understood that the air outlet direction of the first fan 410 and the air outlet direction of the second fan 420 are roughly the same, and both face the heat dissipation component 500.

[0032] It is understood that in this embodiment, by arranging the first fan 410 and the second fan 420 side by side on the mounting bracket 300, with the air outlets of both the first fan 410 and the second fan 420 facing the heat dissipation assembly 500, the heat dissipation effect of the heat dissipation assembly 500 and the projection optical engine is further improved. Meanwhile, since the first fan 410 and the second fan 420 are directly fixed to the mounting bracket 300, it can also be understood that the first fan 410, the second fan 420, and the motherboard 200 are fixed through the same mounting bracket 300. Compared with related prior art, the projection optical engine provided in this embodiment eliminates the fan mounting box, which helps reduce the number of components, decreases the size of the projection optical engine, and improves structural compactness.

[0033] In some embodiments, two or more fans may be installed on the mounting bracket 300, with at least one fan dissipating heat from the heat dissipation component 500 or the projection optical engine; this is not limited to any particular type.

[0034] In some embodiments, the projection optical engine further includes an air duct 600, which connects the air outlet of the fan and the air inlet of the heat dissipation assembly 500. Exemplarily, the air duct 600 is a rubber tube (e.g., a silicone tube). The projection optical engine includes a first fan 410 and a second fan 420 arranged adjacent to each other. The air outlets of the first fan 410 and the second fan 420 are located on the same side. The air outlets of the first fan 410 and the second fan 420 are respectively connected to one end of the air duct 600, and the other end of the air duct 600 is connected to the air inlet of the heat dissipation assembly 500. This allows the airflow from the air outlets of the first fan 410 and the second fan 420 to be guided through the air duct 600 to the air inlet of the heat dissipation assembly 500, thereby further improving the heat dissipation effect of the heat dissipation assembly 500 and the projection optical engine.

[0035] In some embodiments, the heat dissipation assembly 500 includes a heat-conducting element, at least one finned heat sink, and a heat pipe 520; the heat-conducting element is thermally connected to the finned heat sink and the heat pipe 520; at least a portion of the heat-conducting element is disposed on the side of the light source module opposite to the light funnel 172 and is thermally connected to the light source module. Exemplarily, the heat-conducting element is a heat-conducting plate 510 (e.g., a metal plate), and the light source module is fixed on the heat-conducting plate 510. An air duct 600 connects the air outlet of a fan and the air inlet of a finned heat sink. It should be noted that the heat-conducting element can be thermally connected to both a finned heat sink and the heat pipe 520. Alternatively, the heat-conducting element can also be thermally connected to the finned heat sink via the heat pipe 520; this is not limited here.

[0036] For example, the heat dissipation assembly 500 includes a first fin heat sink 5301, a second fin heat sink 5302, and a third fin heat sink 5303. The heat-conducting plate 510 is thermally connected to the first fin heat sink 5301, the second fin heat sink 5302, and the third fin heat sink 5303 respectively via one or more heat pipes 520. In this embodiment, by providing multiple fin heat sinks, each thermally connected to the heat-conducting plate 510, the heat dissipation effect of the heat dissipation assembly 500 is further improved.

[0037] For example, a heat-conducting component is disposed on the side of the lamp plate 171 away from the light funnel 172 and is thermally connected to the lamp plate 171. It is understood that the lamp plate 171 generates a large amount of heat during operation. If this heat is not dissipated in time, it can easily lead to severe overheating of the projection optical engine, reducing its lifespan. In this embodiment, by disposing of the heat-conducting plate 510 on the side of the lamp plate 171 away from the light funnel 172 and thermally connected to the lamp plate 171, the heat generated by the lamp plate 171 during operation can be quickly transferred to the heat-conducting plate 510. Simultaneously, the heat-conducting plate 510 is thermally connected to the heat pipe 520 and at least one finned heat sink. The air duct 600 connects the air outlet of a fan (e.g., the first fan 410 and the second fan 420) and the air inlet of at least one finned heat sink, thereby enabling the heat on the heat-conducting plate 510 to be quickly dissipated through the combined action of the heat pipe 520, the finned heat sink, and the fan. Meanwhile, compared with profile heat sinks, fin heat sinks have better heat dissipation performance, smaller size and more flexible installation under the same heat dissipation requirements, which helps to improve the structural compactness of the projection optical engine.

[0038] Specifically, the first fan 410 and the second fan 420 are arranged side by side below the light funnel 172. The air outlets of the first fan 410 and the second fan 420 are directly opposite the air inlets of at least one finned heat sink. One end of the air duct 600 is fitted onto the air outlet of the first fan 410 and the second fan 420, and the other end of the air duct 600 is fitted onto the air inlet of at least one finned heat sink (e.g., the first finned heat sink 5301). Thus, when the first fan 410 and the second fan 420 are working, the airflow blown out of the air outlets of the first fan 410 and the second fan 420 can quickly flow to the finned heat sink and exchange heat with it. This also accelerates the airflow on the surface of the finned heat sink, allowing the high-temperature air after heat exchange to quickly flow out to the external environment through the vents on the casing. This helps the finned heat sink to transfer heat to the external environment more quickly, thereby improving the heat dissipation effect of the heat dissipation component 500 and the projection optical engine.

[0039] For further information, please refer to [link / reference]. Figure 5At least one snap-fit ​​fin heat sink includes a first snap-fit ​​fin heat sink 5301. The first snap-fit ​​fin heat sink 5301 has a stepped portion 5301a on the side facing the air outlet. The end of the air duct 600 facing away from the fan is fitted onto the stepped portion 5301a. Exemplarily, the air duct 600 is a silicone tube, with the end of the silicone tube facing away from the fan fitted onto the stepped portion 5301a. It is understood that silicone tubes have good flexibility. Fitting one end of the silicone tube onto the air outlet of the fan (e.g., the first fan 410 and the second fan 420) and the other end of the silicone tube onto the stepped portion 5301a is beneficial to improving the heat dissipation effect of the projection optical engine and improving the stability and assembly convenience of the projection optical engine.

[0040] In some embodiments of this application, the heat-conducting element is in surface-to-surface contact with the lamp plate 171. This increases the contact area between the heat-conducting element and the lamp plate 171, accelerates the heat exchange efficiency between the heat-conducting element and the lamp plate 171, and improves the heat dissipation effect of the lamp plate 171.

[0041] Further, please refer to Figure 5 and Figure 6 The heat dissipation assembly 500 includes a first fin heat sink 5301, a second fin heat sink 5302, and a third fin heat sink 5303. The first fin heat sink 5301 is disposed at the bottom of the heat-conducting plate 510, and the heat-conducting plate 510 is disposed between the second fin heat sink 5302 and the third fin heat sink 5303. Alternatively, it can be understood that multiple fin heat sinks are arranged around the outer periphery of the heat-conducting plate 510. A heat pipe 520 passes through the first fin heat sink 5301, the second fin heat sink 5302, the third fin heat sink 5303, and the heat-conducting plate 510. An air duct 600 connects the air outlet of the fan and the air inlet of at least one fin heat sink. In this embodiment, by providing finned heat sinks (such as the first finned heat sink 5301, the second finned heat sink 5302, and the third finned heat sink 5303) at the bottom, left, and right sides of the heat-conducting plate 510, and by having heat pipes 520 pass through the first finned heat sink 5301, the second finned heat sink 5302, the third finned heat sink 5303, and the heat-conducting plate 510, it is beneficial to further improve the heat dissipation effect of the heat-conducting plate 510.

[0042] For example, the first fin heat sink 5301 is arranged adjacent to and directly opposite the fan, with the front projection of the fan's air outlet located on the first fin heat sink 5301. The air duct 600 connects the fan's air outlet and the first fin heat sink 5301's air inlet. This allows the projection optical engine in this application to have better heat dissipation and improves structural compactness.

[0043] For example, please continue reading Figure 5 The heat pipe 520 is shaped like the letter "U" or "S". This improves the structural compactness and heat dissipation effect of the heat dissipation component 500. Specifically, the second fin heat sink 5302 and the third fin heat sink 5303 are generally symmetrically arranged above the first fin heat sink 5301. The heat pipe 520 includes a first heat pipe 521 and a second heat pipe 522, both of which are shaped like the letter "U". The first heat pipe 521 and the second heat pipe 522 are staggered, with one free end of the first heat pipe 521 extending through the opening of the second heat pipe 522 into the interior of the second heat pipe 522 and close to the middle connecting section of the second heat pipe 522. This further improves the heat dissipation effect of the heat dissipation component 500. For example, one free end of the first heat pipe 521 passes through the second fin heat sink 5302 and the third fin heat sink 5303, and is fixedly connected to one side of the heat-conducting plate 510 away from the light source module. Alternatively, the first heat pipe 521 may also penetrate the heat-conducting plate 510, without limitation. It should be noted that "penetrates" means entering from one side of a component and exiting from the other side. The other free end of the first heat pipe 521 penetrates the first fin heat sink 5301, and the middle connecting section of the first heat pipe 521 is located on the side of the third fin heat sink 5303 opposite to the second fin heat sink 5302. One free end of the second heat pipe 522 penetrates the second fin heat sink 5302 and the third fin heat sink 5303, and is fixedly connected to the side of the heat-conducting plate 510 opposite to the light source module. Alternatively, the first heat pipe 521 may also penetrate the heat-conducting plate 510, without limitation. The other free end of the second heat pipe 522 penetrates the first fin heat sink 5301, and the middle connecting section of the second heat pipe 522 is located on the side of the second fin heat sink 5302 opposite to the third fin heat sink 5303.

[0044] Furthermore, the fin radiator includes multiple stacked heat dissipation sub-plates, and the heat pipe 520 is at least partially inserted into the fin radiator. Each heat dissipation sub-plate is thermally connected to the heat pipe 520. Specifically, taking the first fin radiator 5301 as an example, the first fin radiator 5301 includes multiple horizontally stacked heat dissipation sub-plates. A narrow strip-shaped airflow channel extending vertically is formed between two adjacent heat dissipation sub-plates. The portions of the first heat pipe 521 and / or the second heat pipe 522 located within the first fin radiator 5301 also extend substantially horizontally. In this way, each heat dissipation sub-plate can be thermally connected to the first heat pipe 521 and / or the second heat pipe 522, which is beneficial to further improve the heat dissipation effect of the heat dissipation component 500.

[0045] In other embodiments of this application, such as Figure 1As shown, the heat pipe 520 can also be straight. The first fin heat sink 5301 includes multiple heat sink sub-plates stacked vertically. A narrow strip-shaped airflow channel extending horizontally is formed between two adjacent heat sink sub-plates. The portion of the first heat pipe 521 and / or the second heat pipe 522 located in the first fin heat sink 5301 also extends in a generally vertical direction. In this way, each heat sink sub-plate can be thermally connected to the first heat pipe 521 and / or the second heat pipe 522, which is beneficial to further improve the heat dissipation effect of the heat dissipation component 500.

[0046] In some examples of this application, the second fin heat sink 5302 and / or the third fin heat sink 5303 extend toward the side of the lamp panel 171 where the light funnel 172 is provided, and protrude from the step portion 5301a, that is, the end of the second fin heat sink 5302 and / or the third fin heat sink 5303 near the light funnel 172 protrudes from the step portion 5301a.

[0047] For example, please continue reading Figure 5 and Figure 6 The second fin heat sink 5302 and the third fin heat sink 5303 protrude from the step portion 5301a at the end near the light funnel 172, thereby forming a clearance space 540 between the bottom surface of the second fin heat sink 5302 and the third fin heat sink 5303 at the end near the light funnel 172 and the side of the step portion 5301a away from the heat conduction plate 510. The air duct 600 and the end of the fan near the step portion 5301a are located in the clearance space 540, which helps to further improve the structural compactness of the projection optical engine.

[0048] Furthermore, the second fin heatsink 5302 and / or the third fin heatsink 5303 protrudes from the stepped portion 5301a at one end near the light funnel 172, and the end of the second fin heatsink 5302 and / or the third fin heatsink 5303 near the light funnel 172 extends above the air inlet of the fan. For example, the end of the second fin heatsink 5302 near the light funnel 172 extends above the air inlet of the first fan 410. Thus, when the first fan 410 is operating, the first fan 410 can also accelerate the airflow over the surface of the second fin heatsink 5302, improving the heat dissipation effect of the second fin heatsink 5302.

[0049] Furthermore, the end of the third fin heat sink 5303 near the light funnel 172 extends above the air inlet of the second fan 420. Thus, when the second fan 420 is working, the second fan 420 can also accelerate the airflow on the surface of the third fin heat sink 5303 and improve the heat dissipation effect of the third fin heat sink 5303.

[0050] Please refer again to some examples in this application. Figure 1 and Figure 2 The heat-conducting component can also be a profile heat sink 531. The light source module is mounted on the profile heat sink 531 and is thermally connected to the profile heat sink 531. The profile heat sink 531, the first fin heat sink 5301, and the heat pipe 520 are thermally connected. In this way, the light source module transfers heat to the profile heat sink 531, and then the heat is quickly dissipated through the profile heat sink 531, the first fin heat sink 5301, and the heat pipe 520.

[0051] Further, the profile heat sink 531 includes a substrate 5311 (e.g., a metal plate) and at least one heat dissipation portion disposed on the substrate 5311. The light source module is mounted on the substrate 5311 and is thermally connected to the substrate 5311. At least a portion of the heat dissipation portion protrudes from the first fin heat sink 5301 near the light funnel 172. Exemplarily, at least a portion of the heat dissipation portion includes a first heat dissipation portion 5312 and a second heat dissipation portion 5313 disposed opposite to each other. The light source module is mounted on the substrate 5311 and disposed between the first heat dissipation portion 5312 and the second heat dissipation portion 5313.

[0052] Furthermore, the ends of the first heat dissipation part 5312 and the second heat dissipation part 5313 near the light funnel 172 protrude from the step 5301a, thereby forming a clearance space 540 between the bottom surface of the end of the first heat dissipation part 5312 and the side of the step 5301a away from the substrate 5311. The ends of the air duct 600 and the fan near the step 5301a are located within the clearance space 540, which helps to further improve the structural compactness of the projection optical engine.

[0053] Furthermore, the end of the first heat dissipation part 5312 near the light funnel 172 extends above the air inlet of the first fan 410. Thus, when the first fan 410 is working, the first fan 410 can also accelerate the airflow on the surface of the first heat dissipation part 5312 and improve the heat dissipation effect of the first heat dissipation part 5312.

[0054] Furthermore, the end of the second heat dissipation section 5313 near the light funnel 172 extends above the air inlet of the second fan 420. Thus, when the second fan 420 is working, the second fan 420 can also accelerate the airflow on the surface of the second heat dissipation section 5313 and improve the heat dissipation effect of the second heat dissipation section 5313.

[0055] In some examples of this application, the mounting bracket 300 includes a first mounting surface and a second mounting surface disposed opposite to each other. The optical engine module 100, the fan, and the heat dissipation assembly 500 are disposed on the first mounting surface. The optical engine module 100 includes a main housing 110, and the motherboard 200 is disposed on the second mounting surface. The air inlets of the fan are respectively connected to the main housing 110 and the motherboard 200. It should be noted that "the air inlets of the fan are respectively connected to the main housing 110" means that a region of the outer surface of the main housing 110 is connected to the air inlet of the fan, so that air near the surface of the main housing 110 can enter the air inlet of the fan. "The air inlets of the fan are respectively connected to the motherboard 200" means that a region of the outer surface of the motherboard 200 is connected to the air inlet of the fan, so that air near the surface of the motherboard 200 can enter the air inlet of the fan.

[0056] Specifically, the optical engine module 100 is spaced apart from the first mounting surface, and the fans (e.g., the first fan 410 and the second fan 420) are also spaced apart from the first mounting surface. This creates airflow channels between the optical engine module 100 and the first mounting surface, and between the fans and the first mounting surface. This facilitates faster airflow around the outer periphery of the optical engine module 100 and the motherboard 200. Furthermore, the fans can draw air from both the top and bottom, increasing their output airflow and further enhancing the heat dissipation of the projection optical engine.

[0057] In some examples of this application, the heat dissipation assembly 500 also includes a profile heat sink 531. Exemplarily, the profile heat sink 531 has high strength and can protect the components located inside it, which helps to improve the stability of the device.

[0058] In some examples of this application, the extension direction of the heat pipe 520 is set at an angle to the flow direction of at least one finned heatsink. Exemplarily, the extension direction of the heat pipe 520 is set perpendicular to the direction of airflow through the first at least one finned heatsink 1. This is beneficial to improve the heat exchange effect of the heat pipe 520 and the at least one finned heatsink, allowing the heat in the lamp panel 171 and the projection optical engine to dissipate more quickly.

[0059] Please refer to some embodiments of this application. Figure 4 The optical engine module 100 includes a main housing 110, optical components 120, a third fan 430, and a first heat exchanger 140. The main housing 110 primarily provides support and mounting space, and protects the components located within it. The optical components 120 are the core functional components of the projection optical engine, mainly used for imaging. They tend to generate high levels of heat during operation, which can easily be damaged if not dissipated promptly. The third fan 430 and the first heat exchanger 140 are used to accelerate the heat dissipation of the optical components 120 and the projection optical engine in this application.

[0060] Specifically, a first heat exchanger 140 is disposed below the main housing 110. The main housing 110 is provided with a first cavity 111a and a first air inlet 111b and a first air outlet 111c communicating with each other. An optical device 120 is disposed in the first cavity 111a, and a heat dissipation channel is provided in the optical device 120. A second cavity 141a is provided in the first heat exchanger 140. The first heat exchanger 140 is provided with a second air inlet 141b and a second air outlet 141c communicating with each other. The second air inlet 141b is connected to the first air outlet 111c, the second air outlet 141c is connected to the inlet of the heat dissipation channel, and the outlet of the heat dissipation channel is connected to the first air inlet 111b. A first fan 410 is disposed in the second cavity 141a. The first cavity 111a, the second cavity 141a, and the heat dissipation channel form at least part of the internal circulation air duct of the projection optical engine. It should be noted that the first cavity 111a, the second cavity 141a, and the heat dissipation channel form at least part of the internal circulation air duct, that is, the internal circulation air duct includes the first cavity 111a, the second cavity 141a, and the heat dissipation channel.

[0061] In the projection optical engine provided in this embodiment, by setting a second cavity 141a within the first heat exchanger 140 and placing a third fan 430 within the second cavity 141a, it is beneficial to increase the heat exchange area and heat exchange efficiency of the first heat exchanger 140, thereby improving the heat dissipation effect of the projection optical engine and also improving the structural compactness of the projection optical engine. Simultaneously, the first cavity 111a, the second cavity 141a, and the heat dissipation channel form at least a portion of the internal circulation air duct. The low-temperature air blown out by the third fan 430 can directly enter the heat dissipation channel and exchange heat with the optical device 120 inside, further improving the heat dissipation effect and preventing dust and other foreign objects from entering the first cavity 111a and contaminating the optical device 120, thus helping to avoid black spots on the projected image and improving the user experience.

[0062] It is understandable that, since the optical device 120 is the main heat-generating component of the projection optical engine, in order to further enhance the heat dissipation effect of the optical device 120, in some embodiments of this application, along the optical axis, the optical device 120 includes a first Fenwick lens, a heat-insulating glass, an imaging screen, and a second Fenwick lens arranged sequentially at intervals. A first channel is formed between the first Fenwick lens and the heat-insulating glass, a second channel is formed between the heat-insulating glass and the imaging screen, and a third channel is formed between the imaging screen and the second Fenwick lens. The first channel, the second channel, and the third channel form at least a portion of the structure of a heat dissipation channel, that is, the heat dissipation channel includes the first channel, the second channel, and the third channel. Exemplarily, the heat dissipation channel is composed of the first channel, the second channel, and the third channel. The second air outlet 141c is connected to the first channel, the second channel, and the third channel respectively.

[0063] It is understood that in this embodiment, since a first channel is formed between the first Fresnel lens and the heat-insulating glass, a second channel is formed between the heat-insulating glass and the imaging screen, and a third channel is formed between the imaging screen and the second Fresnel lens, and the second air outlet 141c is connected to the first channel, the second channel and the third channel respectively, the cold air flowing into the optical device 120 can directly exchange heat with each component of the optical device 120, and under the driving action of the third fan 430, the heat is carried out of the optical device 120, further improving the cooling efficiency of the optical device 120.

[0064] For example, the first Fresnel lens is primarily used to convert at least part of a diverging beam into a parallel beam. Fresnel lenses have a unique segmented design that significantly reduces material usage, making them very light, thin, and low-cost.

[0065] For example, heat-insulating glass mainly serves to insulate heat and deflect light.

[0066] For example, the imaging screen is an LCD screen, an optical device 120 that uses liquid crystal material to control light transmission. By adjusting the arrangement of liquid crystal molecules, the liquid crystal light valve can effectively control the transmission, reflection, or scattering of light. The first Fresnel lens, the heat-insulating glass, the imaging screen, and the second Fresnel lens work together to display the image.

[0067] In some embodiments of this application, the projection optical engine is a direct-projection sealed projection optical engine, which can prevent dust or foreign objects from entering the first cavity 111a and causing the optical device 120 to be contaminated.

[0068] In some embodiments, the projection optical engine further includes an air distribution guide, through which air flowing from the second air outlet 141c enters the first channel, and / or the second channel, and / or the third channel. Thus, by providing the air distribution guide, the airflow can be adjusted according to the heat dissipation needs of the first, second, and third channels, which facilitates more precise control of the heat generation of the optical device 120 and improves the stability and lifespan of the optical device 120.

[0069] Please refer to some embodiments of this application. Figure 1 and Figure 4The projection optical engine also includes a second heat exchanger 160, which has a heat exchange chamber 162. The heat exchange chamber 162 is connected to the outlet of the heat dissipation channel and the first air inlet 111b. The first cavity 111a, the second cavity 141a, the heat dissipation channel, and the heat exchange chamber 162 form at least a portion of the internal circulation air duct. Exemplarily, the first heat exchanger 140 and the second heat exchanger 160 are disposed opposite each other on both sides of the main housing 110. It is understandable that, since the heat dissipation channel is located inside the optical device 120, when the lower-temperature air passes through the heat dissipation channel, it undergoes heat exchange with the optical device 120. The low-temperature air absorbs heat and transforms into high-temperature air, which then flows out of the heat dissipation channel. In this embodiment, a second heat exchanger 160 is provided inside the projection optical engine, and the outlet of the heat dissipation channel is connected to the heat exchange chamber 162 of the second heat exchanger 160. The high-temperature air flowing out of the heat dissipation channel then flows into the heat exchange chamber 162 of the second heat exchanger 160, where it dissipates heat from the high-temperature gas. Thus, after the high-temperature air is cooled by the second heat exchanger 160 and the first heat exchanger 140, it transforms into low-temperature air and flows back into the heat dissipation channel to cool the optical device 120. This is beneficial for further improving the heat dissipation effect of the optical device 120 and the projection optical engine.

[0070] In some embodiments of this application, the projection optical engine further includes an external air duct, which is disposed outside the internal circulation air duct. This external air duct can also be understood as being disposed between the outer casing and the main casing 110, and communicating with the external environment through a through-hole in the outer casing. The first fan 410 and the second fan 420 are disposed in the external air duct. Further, the surface of the first heat exchanger 140 is provided with a first heat exchange channel 142, and the surface of the second heat exchanger 160 is provided with a second heat exchange channel 161. The first heat exchange channel 142 and the second heat exchange channel 161 form at least a partial structure of the external air duct. Thus, the external air duct and the internal circulation air duct can be thermally connected through the first heat exchanger 140 and the second heat exchanger 160, and the heat from the internal circulation air duct can be conducted to the surrounding environment for heat dissipation through the external air duct. This is beneficial for further improving the heat dissipation effect of the projection optical engine.

[0071] A second aspect of this application also provides a projection device, including a projection optical engine. Since the projection device in this application includes the aforementioned projection optical engine, it should also have the beneficial effects of the projection optical engines in the preceding embodiments, which will not be elaborated here.

[0072] In some embodiments, the projection device includes an LCD projection engine (liquid crystal projection engine), a DLP projection engine (digital light processing projection engine), an LCoS projection engine (liquid crystal on silicon projection engine), etc.

[0073] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0074] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0075] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0076] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A projection optical engine, characterized in that, Includes a motherboard (200), a mounting bracket (300), an optical engine module (100), at least one fan, and a heat dissipation component (500). The motherboard (200) is electrically connected to the optical engine module (100) and is used to control the operation of the optical engine module (100); The optomechanical module (100) includes a light source module and a light funnel (172) disposed on one side of the light source module. The heat dissipation component (500) is at least partially disposed on the side of the light source module away from the light funnel (172), and the heat dissipation component (500) is used to dissipate heat from the light source module. The at least one fan includes a first fan (410), which is located near the light funnel (172) and disposed on one side of the light funnel (172), with the air outlet of the first fan (410) facing the heat dissipation assembly (500). The motherboard (200), the optical engine module (100), the first fan (410), and the heat dissipation component (500) are all mounted on the mounting bracket (300).

2. The projection optical engine as described in claim 1, characterized in that, The at least one fan further includes a second fan (420), which is arranged side by side with the first fan (410) on the mounting bracket (300), and the air outlet of the second fan (420) faces the heat dissipation assembly (500); And / or, the projection optical engine further includes an air duct (600) that connects the air outlet of the fan and the air inlet of the heat dissipation assembly (500).

3. The projection optical engine as described in claim 1, characterized in that, The heat dissipation assembly (500) includes a heat-conducting component, at least one finned heat sink, and a heat pipe (520); the heat-conducting component, the finned heat sink, and the heat pipe (520) are thermally connected; the heat-conducting component is at least partially disposed on the side of the light source module away from the light funnel (172), the light source module is mounted on the heat-conducting component, and is thermally connected to the heat-conducting component; the air duct (600) connects the air outlet of the fan and the air inlet of the finned heat sink.

4. The projection optical engine as described in claim 3, characterized in that, At least one snap-in fin heat sink includes a first snap-in fin heat sink (5301), the first snap-in fin heat sink (5301) has a stepped portion (5301a) on the side facing the air outlet, and the projection optical engine also includes an air duct (600), the end of the air duct (600) opposite to the fan is sleeved on the stepped portion (5301a).

5. The projection optical engine as described in claim 4, characterized in that, The heat-conducting component is a heat-conducting plate (510). The heat dissipation assembly (500) also includes a second fin radiator (5302) and a third fin radiator (5303). The first fin radiator (5301) is disposed at the bottom of the heat-conducting plate (510). The heat-conducting plate (510) is disposed between the second fin radiator (5302) and the third fin radiator (5303). The heat pipe (520) passes through the first fin radiator (5301), the second fin radiator (5302), the third fin radiator (5303), and the heat-conducting plate (510). Alternatively, the heat-conducting component is a profile heat sink (531), the light source module is mounted on the profile heat sink (531) and is thermally connected to the profile heat sink (531); the profile heat sink (531), the first fin heat sink (5301) and the heat pipe (520) are thermally connected.

6. The projection optical engine as described in claim 5, characterized in that, The second fin heat sink (5302) and / or the third fin heat sink (5303) protrude from the first fin heat sink (5301) at one end near the light funnel (172). Alternatively, the profile heat sink (531) includes a substrate (5311) and at least one heat dissipation part disposed on the substrate (5311), the light source module is mounted on the substrate (5311) and is thermally connected to the substrate (5311); at least a portion of the heat dissipation part protrudes from the first fin heat sink (5301) near the end of the light funnel (172).

7. The projection optical engine as described in claim 3, characterized in that, The fin heat sink includes multiple stacked heat sink sub-plates, and the heat pipe (520) is at least partially inserted into the fin heat sink. Each heat sink sub-plate is thermally connected to the heat pipe (520). And / or, the heat pipe (520) is straight or U-shaped.

8. The projection optical engine as described in claim 1 or 2, characterized in that, The mounting bracket (300) includes a first mounting surface and a second mounting surface arranged opposite to each other. The optical engine module (100), the fan and the heat dissipation assembly (500) are disposed on the first mounting surface. The optical engine module (100) includes a main housing (110) and a motherboard (200) is disposed on the second mounting surface. The air inlet of the fan is connected to the main housing (110) and the motherboard (200) respectively.

9. The projection optical engine as described in claim 8, characterized in that, The optomechanical module (100) is spaced apart from the first mounting surface; And / or, the fan is spaced apart from the first mounting surface.

10. A projection device, characterized in that, Includes a projection optical engine as described in any one of claims 1 to 9.

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