Projection device and vehicle

Abstract

The embodiment of the present application provides a kind of projection device, it is related to projection technical field, projection device includes light source, structural member and heat plate, the heat plate includes thermal contact area and heat exchange zone, the light source is connected with the thermal contact area and carries out heat conduction, the heat exchange zone is connected with the structural member and carries out heat conduction.Through setting heat plate, the heat generated by the light source of heat is transferred to the structural member of relatively lower temperature, in turn can expand heat dissipation area, simultaneously heat is conducted to the structural member of lower temperature, to realize heat, can avoid heat accumulation at light source, influence the normal work of light source, improve the life of light source.The size of overall structure is smaller, can be applied to vehicle-mounted environment, and meet the various reliability test requirements of car regulation.In addition, the embodiment of the present application also provides a kind of vehicle.

Description

Technical Field

[0001] This application relates to the field of projection technology, specifically to a projection device and a vehicle. Background Technology

[0002] Traditional optical engines are relatively large in size. Heat pipes, semiconductor coolers, or even axial fans or radial turbines can be designed on the light source devices of the optical engine for active heat dissipation.

[0003] Currently, some micro-optical engines, such as DMD, are being used in automobiles. Due to the relatively small size of the micro-projection optical engine, the surrounding space where it is used is also relatively small, making it impossible to effectively set up the aforementioned active heat dissipation structure. Multiple light sources generate heat and it continues to accumulate. Without effective heat transfer, the ambient temperature of the core components inside the micro-projection optical engine becomes increasingly higher, thus increasing the risk of thermal failure of the device. Therefore, it is urgent to solve the heat dissipation problem of in-vehicle projection devices. Utility Model Content

[0004] This application provides a projection device and a vehicle to at least partially improve the above-mentioned technical problems.

[0005] In a first aspect, embodiments of this application provide a projection device, including a light source, a structural component, and a heat spreader. The heat spreader includes a heat contact area and a heat exchange area. The light source is connected to the heat contact area and conducts heat, and the heat exchange area is connected to the structural component and conducts heat.

[0006] In one embodiment, the plane containing the thermal contact area and the plane containing the heat exchange area are not coplanar.

[0007] In one embodiment, the light source and the thermal contact area are connected by a thermally conductive medium and conduct heat through each other.

[0008] In one embodiment, the heat exchange zone is connected to the structural component via a heat-conducting medium for heat conduction.

[0009] In one embodiment, the heat spreader includes a first thermal contact area and a second thermal contact area, the first thermal contact area being adjacent to and bent relative to the heat exchange area, and the second thermal contact area being adjacent to and bent relative to the heat exchange area.

[0010] In one embodiment, the light source includes a first light source and a second light source, wherein the first light source and the first thermal contact area are connected by a thermally conductive medium, and the second light source and the second thermal contact area are connected by a thermally conductive medium.

[0011] In one embodiment, the thermally conductive medium is thermal paste, thermal pad, or thermal adhesive.

[0012] In one embodiment, the structural component includes a first structural component and a second structural component, and the heat exchange zone includes a first surface and a second surface facing away from each other, wherein the first surface conducts heat with the first structural component, and the second surface conducts heat with the second structural component.

[0013] In one embodiment, the first structural member includes an optical engine housing, and the second structural member includes the housing of the projection device.

[0014] In one embodiment, the thickness of the thermal contact area is less than or equal to 0.3 mm.

[0015] In one embodiment, the thickness of the heat exchange zone is less than or equal to 0.3 mm.

[0016] In one embodiment, the heat spreader is an aluminum plate or a copper plate.

[0017] Secondly, embodiments of this application provide a vehicle including the projection device as described in the first aspect above.

[0018] The projection device and vehicle provided in this application embodiment transfer heat generated by the light source to a relatively cooler structural component by incorporating a heat dissipation plate. This increases the heat dissipation area, and the heat is conducted to the cooler structural component, achieving uniform heat distribution. This prevents heat accumulation at the light source, which could affect its normal operation and extend its lifespan. The overall structure is smaller, making it suitable for automotive environments and meeting various automotive-grade reliability testing requirements. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the 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 from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a projection device according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a heat spreader in a projection device according to an embodiment of this application; Figure 3 This is a cross-sectional structural diagram of a projection device proposed in an embodiment of this application. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present 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 the present application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without inventive effort are within the scope of protection of the present application.

[0022] In this application, unless otherwise expressly specified or limited, the terms "installation," "connection," "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components; they can refer to mere surface contact; or they can refer to surface contact connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] Furthermore, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as referring to specific or particular structures. The terms "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this application, as well as the features of different embodiments or examples.

[0024] Example Please refer to the following: Figure 1 and Figure 2 This application provides a projection device 10, which includes a light source 40, a structural component 30, and a heat spreader 50.

[0025] The structural component 30 is used to mount various components, such as lenses or other optical elements. The structural component 30 itself does not generate heat or generates very little heat. The structural component 30 can be made of materials such as metal or plastic; this embodiment does not limit its use. There can be one or more structural components 30; this embodiment does not limit their use either.

[0026] The heat spreader 50 is used to conduct heat, so the heat spreader 50 is preferably made of a material with high thermal conductivity. In some embodiments, the heat spreader 50 can be, for example, an aluminum plate or a copper plate. Aluminum and copper both have high thermal conductivity and good thermal conductivity, which can quickly conduct heat and improve the heat spreader effect.

[0027] The heat spreader 50 includes a heat contact area 51 and a heat exchange area 55, which are connected to each other. The light source 40 is connected to the heat contact area 51 for heat conduction, and the heat exchange area 55 is connected to the structural member 30 for heat conduction.

[0028] During the thermal conduction connection between the thermal contact area 51 and the light source 40, in order to increase the heat transfer area between the thermal contact area 51 and the light source 40, the thermal contact area 51 can be configured to be in complete contact with the light source 40. In particular, in some embodiments, the thermal contact area 51 can be configured to be generally planar. Similarly, during the thermal conduction connection between the heat exchange area 55 and the structural member 30, in order to increase the heat transfer area between the heat exchange area 55 and the structural member 30, the heat exchange area 55 can be configured to be in complete contact with the structural member 30. In particular, in some embodiments, the heat exchange area 55 can also be configured to be generally planar. Of course, it is understood that in other embodiments, the thermal contact area 51 and the heat exchange area 55 can also be configured to be non-planar, and this embodiment does not limit this.

[0029] By transferring the heat generated by the heat source 40 to the relatively cooler structural component 30, the heat dissipation area can be increased. Simultaneously, the heat is conducted to the cooler structural component 30, achieving uniform heat distribution. This prevents heat accumulation at the heat source 40, which could affect its normal operation and extend its lifespan. The overall structure is smaller, making it suitable for automotive environments and meeting various automotive-grade reliability testing requirements.

[0030] In a vehicle environment, the overall size of the projection device 10 is relatively small. Therefore, to adapt to the vehicle environment, the space occupied by the heat spreader 50 needs to be even smaller. Thus, in some embodiments, the heat contact area 51 and the heat exchange area 55 of the heat spreader 50 can be non-coplanar. In this arrangement, the heat contact area 51 and the heat exchange area 55 can form heat conduction with different surfaces of the projection device 10, which is beneficial for arranging the heat spreader 50 and does not increase the overall size of the projection device 10. Of course, it is understood that in other embodiments, the heat contact area 51 and the heat exchange area 55 can also be coplanar, or the heat contact area 51 and the heat exchange area 55 can be partially coplanar. This embodiment does not limit this.

[0031] To avoid increasing the volume due to the heat spreader 50, the overall thickness of the heat spreader 50 can be kept as small as possible. For example, in some embodiments, the thickness of the heat contact area 51 can be less than or equal to 0.3 mm. A smaller thickness ensures that after the heat contact area 51 forms a thermal conduction relationship with the light source 40, it does not excessively increase the thickness of the optical engine. A smaller thickness reduces thermal resistance and reduces volume. Similarly, in some embodiments, the thickness of the heat exchange area 55 can be less than or equal to 0.3 mm. A smaller thickness ensures that after the heat exchange area 55 forms a thermal conduction relationship with the structural component 30, it does not excessively increase the thickness of the structural component 30 in the thickness direction. Of course, it is understood that in other embodiments, the thicknesses of the heat contact area 51 and the heat exchange area 55 can be other values, and this embodiment does not limit this.

[0032] It is understandable that there can be one or more thermal contact areas 51. When thermally conducting with the light source 40, one thermal contact area 51 can form a thermal conduction with one light source 40. The number of thermal contact areas can be set according to the number of light sources.

[0033] In this embodiment, the heat spreader 50 includes a first thermal contact area 52 and a second thermal contact area 53. The first thermal contact area 52 is adjacent to and bent relative to the heat exchange area 55, and the second thermal contact area 53 is adjacent to and bent relative to the heat exchange area 55. With this configuration, the first thermal contact area 52 and the second thermal contact area 53 can be connected to different light sources 40 for heat conduction, or they can be connected to different areas of the same light source 40 for heat conduction.

[0034] The number of light sources 40 can be one or more, and this embodiment does not limit this. The light source 40 can be a white light source or a monochromatic light source, such as a red light source, a blue light source or a green light source, and can be an LED light source, a laser light source or a laser fluorescent light source, etc.

[0035] In this embodiment, the light source 40 includes a first light source 41 and a second light source 42, and the optical axis directions of the first light source 41 and the second light source 42 are approximately perpendicular to each other. The light emitted from the first light source 41 and the light emitted from the second light source 42 can be the same or different, depending on actual needs.

[0036] The first thermal contact area 52 forms a thermal conductive connection with the first light source 41, and the second thermal contact area 53 forms a thermal conductive connection with the second light source 42. The heat generated by the first light source 41 can be conducted to the heat exchange area 55 through the first thermal contact area 52, and the heat generated by the second light source 42 can be conducted to the heat exchange area 55 through the first thermal contact area 52.

[0037] Specifically, in this embodiment, the first thermal contact area 52 can be attached to the heat dissipation substrate of the first light source 41, and the first thermal contact area 52 can be approximately perpendicular to the heat exchange area 55. The second thermal contact area 53 can be attached to the heat dissipation substrate of the second light source 42, and the second thermal contact area 53 can be approximately perpendicular to the heat exchange area 55. The angle between the first thermal contact area 52 and the heat exchange area 55 can be set according to the actual position of the light source 40, and the angle between the second thermal contact area 53 and the heat exchange area 55 can be set according to the actual position of the light source 40. To further improve the heat conduction efficiency, the light source 40 and the thermal contact area 51 can be connected and conduct heat through a thermally conductive medium 60. For example, the first light source 41 and the first thermal contact area 52 can be connected and conduct heat through the thermally conductive medium 60, and the second light source 42 and the second thermal contact area 53 can be connected and conduct heat through the thermally conductive medium 60. The thermally conductive medium is thermal paste, thermal pad, or thermal adhesive. Thermal paste is preferred as the heat-conducting medium. By using thermal paste, the thermal resistance between the thermal contact area 51 and the light source 40 can be reduced, improving the efficiency of heat transfer from the light source 40 to the thermal contact area 51. Simultaneously, the thermal paste itself has a certain degree of adhesion, thus allowing the thermal contact area 51 and the light source 40 to be bonded together without the need for additional bolts or other fasteners, further reducing the size of the projection device 10. In some other embodiments, thermal paste may not be used; in this case, the thermal contact area 51 can be directly clamped between the structural component 30 and the light source 40, adhering to the light source 40. Due to the difference in actual power between the first light source 41 and the second light source 42, the two light sources have different temperatures, and a temperature difference exists between them and the heat exchange area, enabling heat conduction to the heat exchange area and resulting in good heat dissipation. Of course, the temperatures of the two light sources can also be the same.

[0038] In some embodiments, the number of heat exchange zones 55 may be one or more. In this embodiment, there is one heat exchange zone 55. The heat conducted by the first heat contact zone 52 and the heat conducted by the second heat contact zone 53 are both exchanged with the structural component 30 through the heat exchange zone 55. To improve the heat exchange efficiency of the heat exchange zone 55, in this embodiment, please combine with... Figure 2 and Figure 3The structural component 30 includes a first structural component 31 and a second structural component 32. The heat exchange zone 55 includes a first surface and a second surface facing away from each other. The first surface conducts heat with the first structural component 31, and the second surface conducts heat with the second structural component 32. By conducting heat through both surfaces simultaneously, heat can be conducted from the heat exchange zone 55 to both the first structural component 31 and the second structural component 32. At this time, both the first structural component 31 and the second structural component 32 can dissipate heat outward simultaneously, increasing the heat dissipation area and efficiency, and preventing heat accumulation in the heat exchange zone 55. The first structural component 31 and the second structural component 32 have lower temperatures, thus completing the transfer of heat to the low-temperature structural components, thereby achieving heat balance between the heat source and non-heat source structures in the entire system.

[0039] Specifically, in this embodiment, the projection device 10 includes an optical engine 20, which includes the light source 40. The optical engine 20 may be an optical engine using DMD technology, or it may be an optical engine using other technologies. This embodiment does not limit this.

[0040] In one embodiment, the first structural member 31 may include the housing of the optical engine 20, and the second structural member 32 may include the housing of the projection device 10, specifically the bottom of the housing of the projection device 10. This embodiment does not limit this. The housing of the optical engine 20 may be located substantially inside the housing of the projection device 10. The structures of the first structural member 31 and the second structural member 32 can be configured in any configuration, and this embodiment does not limit this. In other embodiments, the first structural member 31 and the second structural member 32 may also be other non-heat-generating components of the projection device 10, and this embodiment does not limit this.

[0041] To further improve heat transfer efficiency, the heat exchange zone 55 can be connected to the structural component 30 via a thermally conductive medium 60 for heat conduction. This thermally conductive medium can be thermal paste, a thermal pad, or a thermal adhesive, with thermal paste being preferred. By using thermal paste, the thermal resistance between the heat exchange zone 55 and the structural component 30 can be reduced, improving the efficiency of heat transfer from the heat exchange zone 55 to the structural component 30. Simultaneously, the thermal paste itself has a certain degree of adhesion, allowing the heat exchange zone 55 and the structural component 30 to be bonded together without the need for additional bolts or other fasteners, further reducing the size of the projection device 10. In some other embodiments, thermal paste may not be used. In this case, the heat exchange zone 55 can be directly sandwiched between the first structural component 31 and the second structural component 32, adhering to both components to form a heat conduction connection. It is understood that in some other embodiments, the number of structural components 30 can be two or more, all simultaneously conducting heat with the heat exchange zone 55 to further improve heat dissipation efficiency.

[0042] In this embodiment, the heat spreader 50 does not require bolts or other fasteners to form a heat conduction connection with the light source 40 and the structural component 30. Therefore, the use of bolts and other fasteners can be reduced, further reducing the volume of the entire projection device 10 and lowering the assembly process difficulty.

[0043] The heat transfer process of the projection device 10 provided in this embodiment is as follows: When the light source 40 is working, it generates heat. The heat is conducted to the heat spreader 50 through the heat contact area 51. Since the heat spreader 50 has good thermal conductivity, the heat is quickly and evenly dispersed on the heat spreader 50, and the temperature of the heat exchange area 55 rises accordingly. At this time, the heat exchange area 55 exchanges heat with the structural component 30, and the heat is at least partially transferred to the structural component 30 and dissipated outward through the structural component 30. Since the structural component 30 has a larger heat dissipation area, the heat dissipation efficiency can be significantly improved, and heat can be prevented from accumulating rapidly in the light source 40, which would affect the normal use of the light source 40.

[0044] The projection device 10 provided in this embodiment transfers heat generated by the heat source 40 to a relatively cool structural component 30 via a heat dissipation plate 50. This increases the heat dissipation area and prevents heat accumulation at the heat source 40, thus improving its lifespan and allowing it to function normally. The overall structure is smaller, making it suitable for automotive environments and meeting various automotive-grade reliability testing requirements. It eliminates the need for additional bolts or other fasteners, further reducing the overall size of the projection device 10.

[0045] This embodiment also provides a vehicle (not shown) equipped with the above-mentioned projection device 10. The projection device 10 can be installed inside or outside the vehicle, and this embodiment does not limit it in this regard.

[0046] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A projection device, characterized in that, include: The system includes a light source, a structural component, and a heat spreader. The heat spreader includes a heat contact area and a heat exchange area. The light source is connected to the heat contact area for heat conduction, and the heat exchange area is connected to the structural component for heat conduction.

2. The projection device according to claim 1, characterized in that, The plane containing the thermal contact area and the plane containing the heat exchange area are not coplanar.

3. The projection device according to claim 1, characterized in that, The light source and the thermal contact area are connected by a thermally conductive medium and conduct heat through each other.

4. The projection device according to claim 1, characterized in that, The heat exchange zone is connected to the structural component via a heat-conducting medium and conducts heat through it.

5. The projection device according to claim 1, characterized in that, The heat spreader includes a first heat contact area and a second heat contact area. The first heat contact area is adjacent to the heat exchange area and is bent relative to the heat exchange area. The second heat contact area is adjacent to the heat exchange area and is bent relative to the heat exchange area.

6. The projection device according to claim 5, characterized in that, The light source includes a first light source and a second light source. The first light source and the first thermal contact area are connected by a thermally conductive medium, and the second light source and the second thermal contact area are connected by a thermally conductive medium.

7. The projection device according to claim 3, 4, or 6, characterized in that, The thermally conductive medium is thermally conductive paste, thermally conductive pad, or thermally conductive adhesive.

8. The projection device according to claim 5, characterized in that, The structural component includes a first structural component and a second structural component. The heat exchange zone includes a first surface and a second surface facing away from each other. The first surface conducts heat with the first structural component, and the second surface conducts heat with the second structural component.

9. The projection device according to claim 8, characterized in that, The first structural component includes an optical engine housing, and the second structural component includes the housing of the projection device.

10. The projection device according to claim 1, characterized in that, The thickness of the thermal contact area is less than or equal to 0.3 mm.

11. The projection device according to claim 1, characterized in that, The thickness of the heat exchange zone is less than or equal to 0.3 mm.

12. The projection device according to claim 1, characterized in that, The heat spreader is an aluminum plate or a copper plate.

13. A vehicle, characterized in that, Includes the projection device as described in any one of claims 1-12.

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