Cooling device, head-up display equipment and vehicle

Abstract

The utility model provides a cooling device, head-up display equipment and a vehicle, the cooling device is applied to the head-up display equipment, the cooling device comprises a cooling air duct, the cooling air duct is provided with an air inlet and an air outlet, and the cooling air duct is located between a display panel and an optical function part of an image source under the condition that the cooling air duct is installed on the head-up display equipment and used for conveying cooling gas. On the premise of ensuring the display effect of the HUD, the temperature of the display panel of the HUD can be reduced, and the risks that the temperature of the display panel exceeds the required working temperature, and the display panel is burnt down are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of head-up display devices, and in particular to a cooling device, a head-up display device and a vehicle. BACKGROUND

[0002] Head-up display (HUD) technology refers to a principle of optical reflection, which projects light emitted by an image source onto an imaging window (imaging panel, windshield glass, etc.), and reflects the light into an eyebox via the imaging window to form a virtual image. The virtual image can display information that needs to be displayed, such as driving-related information such as vehicle speed, to avoid distraction caused by the driver looking down at the instrument panel during driving, thereby improving driving safety and providing a better driving experience.

[0003] The display panel of the existing HUD usually adopts a TFT liquid crystal screen, which has the characteristics of high brightness, high definition, high contrast, high response speed and cost performance, and is widely used. However, the TFT liquid crystal screen is easily damaged when the temperature reaches 105℃, and when the HUD is working, the liquid crystal screen is easily damaged when the ambient temperature, backlight and sunlight jointly reach 105℃, thereby affecting the display effect of the HUD and the use experience of the customer.

[0004] At present, there is an urgent need for a device that can reduce the temperature of the display panel of the HUD while ensuring the display effect of the HUD. Content of the Utility Model

[0005] The present application aims to at least solve one of the technical problems in the prior art, and provides a cooling device, a head-up display device and a vehicle, which can reduce the temperature of the display panel of the HUD while ensuring the display effect of the HUD.

[0006] To achieve the above-mentioned purpose, the present application provides a cooling device applied to a head-up display device, comprising a cooling air duct, the cooling air duct is provided with an air inlet and an air outlet, and the cooling air duct is located between a display panel and an optical functional part of an image source when installed in the head-up display device, and is used for conveying cooling gas.

[0007] In some embodiments, the cooling air duct comprises a frame, the frame is used for being installed between the display panel and the optical functional part, and is used for maintaining a preset distance between the surfaces of the display panel and the optical functional part opposite to each other.

[0008] The frame is annular, and the space surrounded by the frame between the display panel and the optical functional part is used for conveying the cooling gas; the air inlet and the air outlet are arranged on opposite sides of the frame.

[0009] In some embodiments, the frame is provided with a first step portion near a surface of the display panel for supporting an edge of the display panel; and / or,

[0010] The frame is provided with a second step portion near a surface of the optical functional member for defining a position of the optical functional member.

[0011] In some embodiments, the cooling device further comprises a refrigeration mechanism for providing the cooling gas to an inside of the cooling air duct through the air inlet.

[0012] In some embodiments, the refrigeration mechanism comprises:

[0013] a circulating air duct, an air outlet end of the circulating air duct being connected with the air inlet, and an air inlet end of the circulating air duct being connected with the air outlet;

[0014] a power component arranged in the circulating air duct for providing power for circulation of the gas in the cooling air duct and the circulating air duct; and

[0015] a refrigeration device arranged in the circulating air duct for cooling the gas flowing in the circulating air duct.

[0016] In some embodiments, the power component comprises a supply fan arranged in the circulating air duct for supplying air to the air inlet; the refrigeration device is arranged in the circulating air duct and located between a supply side of the supply fan and the air inlet for cooling the gas flowing from the supply side of the supply fan to the air inlet; or,

[0017] the power component comprises an exhaust fan arranged in the circulating air duct for providing an exhaust force to exhaust the gas in the cooling air duct from the air outlet; the refrigeration device is arranged in the circulating air duct and located between an exhaust side of the exhaust fan and the air inlet for cooling the gas flowing from the exhaust side of the exhaust fan to the air inlet.

[0018] In some embodiments, the refrigeration device is a semiconductor refrigeration device, a cold end of the semiconductor refrigeration device being arranged in the circulating air duct, and a hot end of the semiconductor refrigeration device being arranged outside a housing of the head-up display device.

[0019] In some embodiments, the cooling air duct is located inside a housing of the head-up display device when installed in the head-up display device;

[0020] the circulating air duct, the power component and the refrigeration device are all located inside the housing; or,

[0021] A portion of the circulating air duct is located outside the housing, and at least one of the power component and the refrigerator is located in the portion of the circulating air duct inside or outside the housing.

[0022] In some embodiments, the refrigerator comprises a refrigerator, a supply fan and an air inlet duct, wherein an air outlet end of the air inlet duct is connected to the air inlet; an air inlet end of the air inlet duct is connected to a supply side of the supply fan; the supply fan supplies air to the air inlet through the air inlet duct; and the refrigerator is arranged in the air inlet duct to cool the air from the supply fan.

[0023] In some embodiments, the cooling air duct is located inside a housing of the head-up display device when installed in the head-up display device.

[0024] The air inlet duct, the supply fan and the refrigerator are all located inside the housing; or,

[0025] A portion of the air inlet duct is located outside the housing, and at least one of the supply fan and the refrigerator is located in the portion of the air inlet duct inside or outside the housing.

[0026] In some embodiments, the cooling air duct is located outside a housing of the head-up display device when installed in the head-up display device.

[0027] The cooling device further comprises an exhaust fan and an exhaust air duct, wherein the exhaust fan is arranged outside the housing; an air inlet end of the exhaust air duct is connected to the air outlet; and an air outlet end of the exhaust air duct is connected to an air inlet side of the exhaust fan; or,

[0028] The cooling device further comprises a supply fan and an air inlet duct, wherein the supply fan is arranged outside the housing; an air outlet end of the air inlet duct is connected to the air inlet; and an air inlet end of the air inlet duct is connected to a supply side of the supply fan.

[0029] In some embodiments, the exhaust air duct comprises a plate-shaped body arranged on a circumferential side of the optical functional member and located on a side of the cooling air duct away from the display panel.

[0030] An exhaust passage is arranged in the plate-shaped body, an air inlet end of the exhaust passage is connected to the air outlet on the side of the cooling air duct away from the display panel; the exhaust fan is located on a side of the plate-shaped body away from the optical functional member; and an air outlet end of the exhaust passage is connected to an air inlet side of the exhaust fan on the side of the plate-shaped body away from the optical functional member.

[0031] In some embodiments, the plate-shaped body is a part of a box of the head-up display device for accommodating the optical functional piece.

[0032] In some embodiments, the cooling device further comprises a heat sink, which, when mounted to the head-up display device, is located on a side of the backlight away from the optical functional piece.

[0033] An air outlet end of the heat sink is connected to an air inlet side of the exhaust fan.

[0034] In some embodiments, the cooling device further comprises an air cavity, which is located between the air outlet end of the heat sink and the air outlet end of the exhaust air duct, and the air inlet side of the exhaust fan.

[0035] As another technical solution, the present application also provides a head-up display device, comprising a display panel, an optical functional piece arranged on a side of the display panel away from a light-emitting surface thereof, a backlight arranged on a side of the optical functional piece away from the display panel, and the above-mentioned cooling device provided by the present application.

[0036] In some embodiments, the head-up display device further comprises a housing.

[0037] The display panel, the cooling device, the optical functional piece and the backlight are all located outside the housing; or,

[0038] The display panel, the cooling device, the optical functional piece and the backlight are all located inside the housing; or,

[0039] The display panel and the cooling device are both located inside the housing; the optical functional piece and the backlight are both located outside the housing; or,

[0040] The display panel is located inside the housing; the cooling device, the optical functional piece and the backlight are all located outside the housing.

[0041] As another technical solution, the present application also provides a vehicle, comprising:

[0042] The above-mentioned head-up display device provided by the present application.

[0043] Other purposes and features of the present application will be clear through reading the specification, claims and drawings of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0044] The above-mentioned and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0045] Figure 1An application diagram of the head-up display device provided in some examples;

[0046] Figure 2 A structural diagram of a cooling air duct of the cooling device provided in the embodiments of the present application;

[0047] Figure 3 A vertical sectional view of the cooling device provided in the embodiments of the present application in the case of being installed in the head-up display device;

[0048] Figure 4 A temperature diagram of each position in the case of the head-up display device provided in the embodiments of the present application being installed in a vehicle or the like;

[0049] Figure 5 A vertical sectional view of the cooling air duct of the cooling device provided in the embodiments of the present application;

[0050] Figure 6 A structural diagram of one kind of refrigeration mechanism adopted in the embodiments of the present application in the case of the cooling air duct being located inside the casing;

[0051] Figure 7 A structural diagram of one kind of refrigeration mechanism adopted in the embodiments of the present application in another case of the cooling air duct being located inside the casing;

[0052] Figure 8 A structural diagram of another kind of refrigeration mechanism adopted in the embodiments of the present application in the case of the cooling air duct being located inside the casing;

[0053] Figure 9 A partial enlarged view of the refrigeration device and the air supply fan adopted in the embodiments of the present application;

[0054] Figure 10 A structural diagram of the exhaust air fan and the exhaust air duct adopted in the embodiments of the present application in the case of the cooling air duct being located outside the casing;

[0055] Figure 11 A vertical sectional view of the exhaust air fan and the exhaust air duct adopted in the embodiments of the present application in the case of the cooling air duct being located outside the casing;

[0056] Figure 12 A perspective view of the exhaust air duct adopted in the embodiments of the present application;

[0057] Figure 13 A solid sectional view of the exhaust air duct adopted in the embodiments of the present application.

[0058] Main element symbol explanation:

[0059] 100 - image source; 10 - light source; 20 - display panel; 30 - optical function; 70 - housing; 200 - windshield; 300 - preset eyebox area; 400 - virtual image; 500 - cooling device; 50 - cooling air duct; 501 - air inlet; 502 - air outlet; 503 - gas conveying space; 504 - first step portion; 505 - second step portion; 51, 51' - refrigeration mechanism; 511 - circulating air duct; 512 - power component; 513 - refrigerator; 513a - hot end; 513b - cold end; 514 - air inlet duct; 515 - air outlet fan; 516 - air outlet duct; 516a - air outlet channel; 516a1 - air inlet end; 516a2 - air outlet end; 517 - air cavity; 52 - heat sink; 60 - box body. DETAILED DESCRIPTION

[0060] Embodiments of the present application are described below in detail with reference to the accompanying drawings, in which the same or similar components have the same or similar designations and functions throughout the several views and / or embodiments, and the embodiments described below are examples in which the present application can be implemented. The embodiments described below are merely examples for explaining the present application and should not be construed as limiting the present application.

[0061] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be construed as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the present application. In addition, the terms "first", "second" are used for descriptive purposes only and cannot be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0062] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0063] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplifying the present application, the components and arrangements of the specific examples described hereinafter are intended to be examples only. These are presented as examples of the various aspects of the present application and are not intended to limit the present application in any manner. Further, the present application can apply to any variety of the example embodiments as well as modifications thereof, which will appear to those skilled in the art from the description herein.

[0064] In the description of the present specification, the description of the terms "one embodiment", "certain embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0065] In the related art, in order to make the working temperature of the display panel of the HUD meet the requirements, one method is to reduce the imaging brightness of the display panel to reduce the temperature of the display panel itself, but this way of sacrificing imaging brightness will affect the imaging quality and reduce the user experience. Another method is to paste high-transmission and high-thermal-conductivity glass on the surface of the display panel to reduce the surface temperature of the liquid crystal screen, but in order to ensure the heat dissipation contact area, the assembly requirement is higher, and the high-transmission and high-thermal-conductivity glass also greatly increases the cost of the HUD.

[0066] In order to solve one of the above technical problems, the embodiment of the present application provides a cooling device applied to a head-up display device, which can be installed on a vehicle or other transportation tool. As shown in Figure 1As shown, the head-up display device includes an image source 100 for outputting image light, the image source 100 includes a backlight 10, and a display panel 20 and an optical functional element 30 arranged on the light exit side of the backlight 10. The display panel 20 is, for example, a liquid crystal display panel, and includes a plurality of pixel units, each of which includes a plurality of pixels, for example, each pixel unit includes red, green and blue pixels; for another example, each pixel unit includes red, green, blue and white pixels. The display panel 20 is used to convert the light of the backlight 10 into image light. The windshield 200 of the vehicle is used to reflect the image light to a preset eyebox region 300, so that when the observer's eyes are in the preset eyebox region 300, the observer can see the image formed by the image light. At this time, the image observed by the observer is a virtual image 400 formed by the windshield 200 in a reflection imaging manner. The observer can be a driver or a passenger, and the observer can obtain the required vehicle information such as driving speed, fuel consumption, etc. in the virtual image 400 in front of the line of sight, or other information such as the image of a virtual rearview mirror or the image of audio and video entertainment, etc. The above-mentioned preset eyebox region (i.e. eyebox) 300 refers to the region where the observer's eyes are located, and the image output by the head-up display device (i.e. the above-mentioned virtual image 400) can be seen.

[0067] The optical functional element 30 is arranged between the backlight 10 and the display panel 20, and is used to adjust the light of the backlight 10, so that the light emitted by the display panel 20 is directed to the preset eyebox region 300. The adjustment of the optical functional element 30 to the light includes but is not limited to direction control such as collimation, convergence, diffusion, etc., which includes, for example, a converging element, a light angle control element, a diffusion element, etc. The light angle control element can include one or a combination of convex lenses, concave lenses, Fresnel lenses, etc. In addition, the head-up display device further includes a housing 70 (as shown), the display panel 20 and the corresponding components on the light exit side of the display panel 20 are located inside the housing 70, and the optical functional element 30 can be located inside the housing 70, or located outside the housing 70, or part of it is located inside the housing 70 and part of it is located outside the housing 70. The backlight 10 can be located inside the housing 70, or located outside the housing 70, or part of it is located inside the housing 70 and part of it is located outside the housing 70. Figure 6 As shown, the display panel 20 and the corresponding components on the light exit side of the display panel 20 are located inside the housing 70, and the optical functional element 30 can be located inside the housing 70, or located outside the housing 70, or part of it is located inside the housing 70 and part of it is located outside the housing 70. The backlight 10 can be located inside the housing 70, or located outside the housing 70, or part of it is located inside the housing 70 and part of it is located outside the housing 70.

[0068] Please refer to Figure 2 and Figure 3 The cooling device 500 provided by the embodiment of the present application includes a cooling air duct 50, which is provided with an air inlet 501 and an air outlet 502. The cooling air duct 50 is located between the display panel 20 of the image source and the optical functional element 30 of the image source 10 when the head-up display device is installed, and is used to transport cooling gas.

[0069] AsFigure 4 As shown, when the head-up display (HUD) is installed on a vehicle or other means of transportation, the temperature outside the vehicle's windshield is T1, the temperature inside the windshield is T2, the temperature at the location of the HUD (e.g., within the dashboard cavity) is T3, the temperature inside the HUD's housing 70 is T4, and the temperature of the space between the image source display panel 20 and the optical functional component 30 is T5. The inventors, through analysis, discovered that the display panel 20 experiences heat radiation primarily from two sources during operation. One source is the backlight 10, whose emitted light, after passing through the optical functional component 30, causes a temperature rise ΔTa on the light-incident side of the display panel 20. The other source is reverse sunlight, with the reversed sunlight propagating in the following direction: Figure 4 As indicated by the dashed arrow, its thermal radiation to the display panel 20 causes a temperature rise ΔTb on the light-emitting side of the display panel 20. Due to the reversibility of the optical path, external light passing through the vehicle's windshield and into the head-up display device (e.g., ...) Figure 4The sunlight (indicated by the dotted arrow in the figure) is converged by the reflecting element 01 in the light path, thereby increasing the intensity of the sunlight incident on the display panel 20; in the case where the intensity of the sunlight is very high, even if only part of the sunlight is incident on the reflecting element 01, due to the converging effect of the reflecting element 01, the intensity of the sunlight (for example, the light spot converged near the display panel 20) finally incident on the display panel 20 can still be high; in this case, the sunlight finally incident on the display panel 20 can cause the temperature of the display panel 20 to rise; after the temperature of the display panel 20 is greater than a predetermined temperature, the display panel 20 can be damaged by heat. For example, the display panel 20 can be burned out. Among them, the heat radiation of the backlight 10 to the display panel 20 is continuous, and the heat radiation effect of the sunlight backflow is short, but the temperature rise caused by the latter is instantaneous, and the two together can easily cause the temperature of the display panel 20 to exceed the normal working temperature, or even burn out. Based on this, the cooling air duct 50 is arranged between the display panel 20 and the optical functional element 30, and the cooling gas is introduced into the cooling air duct 50 through the air inlet 501, and the gas in the cooling air duct 50 is discharged through the air outlet 502, so as to directly cool the display panel 20 on the light-incident side of the display panel 20, and the components of the optical functional element 30 exposed to the cooling air duct 50, and reduce the temperature T5 of the space between the display panel 20 and the optical functional element 30, so as to effectively reduce the temperature rise Ta of the light-incident side of the display panel 20, thereby greatly reducing or even avoiding the risk of the temperature of the display panel 20 exceeding the required working temperature and burning out. On this basis, the cooling air duct 50 used in the embodiments of the present application does not sacrifice the imaging brightness, and ensures the imaging quality, thereby ensuring the display effect of the head-up display device, and the installation of the cooling air duct 50 has lower assembly requirements and lower equipment cost than the related art of attaching high-transparency and high-thermal-conductivity glass to the surface of the display panel.

[0070] It should be noted that the way in which the cooling air duct 50 is introduced into the cooling air duct 50 through the air inlet 501 and the gas in the cooling air duct 50 is discharged through the air outlet 502 can be various, and the device for providing cooling gas can be provided with the cooling device 500 (described in detail below), or can be another device not belonging to the cooling device 500, or can be a gas with a relatively low temperature but not cooled by the device, for example, air outside the shell 70 can be directly sent into the cooling air duct 50 through a corresponding device, and the embodiments of the present application have no limitation in this regard.

[0071] The cooling air duct 50 for realizing the above cooling function can have various structures, and in some embodiments, in order to avoid the increase of parts as much as possible and simplify the structure of the device, the cooling air duct 50 can be arranged in the form of a channel, and the cooling air duct 50 can be arranged in the form of a channel. Figure 2 and Figure 3As shown, the cooling air duct 50 includes a frame body mounted between the display panel 20 and the optical functional component 30 for maintaining a preset distance between the surfaces of the display panel 20 and the optical functional component 30 opposite to each other; and the frame body is annular, and the space surrounded by the frame body between the display panel 20 and the optical functional component 30 constitutes a gas conveying space 503 for conveying cooling gas; and the air inlet 501 and the air outlet 502 are arranged on opposite sides of the frame body.

[0072] Specifically, the frame body can be the frame body originally arranged between the display panel 20 and the optical functional component 30 of the head-up display device for supporting and fixing, so as to reduce components, simplify the structure of the device, and realize "one thing with multiple uses". On this basis, the frame body is improved in the embodiments of the present application, that is, the frame body maintains a preset distance between the surfaces of the display panel 20 and the optical functional component 30 opposite to each other, so that the space surrounded by the frame body can constitute the gas conveying space 503 between the display panel 20 and the optical functional component 30. The cooling gas flowing through the gas conveying space 503 can take away the heat generated by the components of the display panel 20 and the optical functional component 30 adjacent to the gas conveying space 503, directly cool the components of the display panel 20 and the optical functional component 30 adjacent to the cooling air duct 50, and reduce the space temperature T5 between the display panel 20 and the optical functional component 30. In addition, by arranging the air inlet 501 and the air outlet 502 on opposite sides of the frame body, the cooling gas entering the gas conveying space 503 through the air inlet 501 can mainly flow in the direction opposite to the air outlet 502, and then be discharged from the air outlet 502. During the flowing process, the cooling gas will not be subjected to excessive resistance, the flow rate of the gas is improved, and the heat exchange efficiency is improved. In some embodiments, as shown in FIG. 2, the air inlet 501 and the air outlet 502 are arranged on the same side of the frame body. Figure 2 As shown, the air inlet 501 and the air outlet 502 are openings penetrating through the frame body. The part of the frame body other than the openings is a solid part, so as to ensure that the positions of the gas conveying space 503 other than the air inlet 501 and the air outlet 502 are closed, thereby ensuring the cooling efficiency.

[0073] It should be noted that, in actual application, for the head-up display device originally without the frame body arranged between the display panel 20 and the optical functional component 30, the embodiments of the present application can add the frame body between the display panel 20 and the optical functional component 30 to form a channel capable of conveying cooling gas. For the head-up display device originally with other structures (such as a shell, a support block, etc.) arranged between the display panel 20 and the optical functional component 30, the embodiments of the present application can replace the other structures with the frame body, or directly improve the other structures to form a space capable of conveying cooling gas. These improvements all belong to the protection scope of the embodiments of the present application.

[0074] According to the profile shape of the display panel, the frame body is usually a rectangular frame body, in which case, the air inlet 501 and the air outlet 502 can be arranged on opposite two strip-shaped sides of the rectangular frame body, but the embodiments of the present application are not limited thereto, and in actual applications, the air inlet 501 and the air outlet 502 can also be arranged on adjacent two strip-shaped sides of the rectangular frame body according to specific needs. In addition, the number of the air inlet 501 and the air outlet 502 can be one or multiple, as long as the input and output of the cooling gas can be realized under the premise of cooling the display panel 20, and the embodiments of the present application have no limitation in this regard.

[0075] In some embodiments, in order to keep the surfaces of the display panel 20 and the optical functional member 30 opposite to each other at a preset distance, as shown in Figure 5 The frame body is provided with a first step portion 504 for supporting the edge of the display panel 20 near the surface of the display panel 20, and / or a second step portion 505 for limiting the position of the optical functional member 30 near the surface of the optical functional member 30. With the first step portion 504, the display panel 20 can be stably supported and limited in position, and with the second step portion 505, the optical functional member 30 can be limited in position, and on this basis, the first step portion 504 and / or the second step portion 505 can keep the surfaces of the display panel 20 and the optical functional member 30 opposite to each other at a preset distance. Specifically, the first step portion 504 can be a groove arranged on at least two opposite strip-shaped sides of the rectangular frame body and located on the surface opposite to the display panel 20, and the edge region of the surface of the display panel 20 on the light-entering side is overlaid on the groove bottom surface. The second step portion 505 can be a groove arranged on at least two opposite strip-shaped sides of the rectangular frame body and located on the surface opposite to the optical functional member 30, and the edge region of the component adjacent to the groove of the optical functional member 30 is overlaid on the groove bottom surface.

[0076] It should be noted that the component of the optical functional member 30 exposed to the cooling air duct 50 can be an optical film or an optical element such as a concave lens or a convex lens. In the case where the optical functional member 30 includes multiple optical films, the outer contour sizes of the multiple optical films are different and gradually increase in the direction away from the cooling air duct 50. Taking the two optical films (31a, 31b) shown in Figure 3 as an example, in combination with Figure 5The second step portion 505 may include two step surfaces, and each step surface is stacked correspondingly to the edge region of each optical film. When the optical element included in the optical functional component 30 is a concave lens, and this concave lens is exposed within the cooling air duct 50, by aligning the plane of the concave lens towards the cooling air duct 50, it is possible to avoid excessive space within the cooling air duct 50 due to the concave surface of the lens facing the cooling air duct 50, thus preventing an impact on cooling efficiency. Of course, in practical applications, if the cooling efficiency meets the requirements, the concave surface of the concave lens can also face the cooling air duct 50.

[0077] In some embodiments, such as Figure 6 As shown, the cooling device 500 also includes a refrigeration mechanism 51, which is used to cool the interior of the cooling duct 50 (i.e., through the air inlet 501) via the air inlet 501. Figure 2 and Figure 3 The gas delivery space 503 shown provides cooling gas. Furthermore, to reduce the workload of the cooling mechanism 51 and improve cooling efficiency, the cooling mechanism 51 is configured to supply cooling gas to the interior of the cooling duct 50 through the air inlet 501, while simultaneously recovering the gas discharged from the air outlet 502. This allows the cooling gas to circulate within the cooling duct 50, ensuring that the inside and outside of the cooling duct 50 are isolated, i.e., gas circulation occurs within a closed space. This allows the cooling mechanism 51 to primarily cool the gas within the cooling duct 50, thereby reducing its workload and improving cooling efficiency. Additionally, by isolating the inside and outside of the cooling duct 50, external dust and other substances can be prevented from being brought into the cooling duct 50, thus avoiding contamination of the display panel 20 and optical components 30, and preventing any impact on the IP rating (protection rating for electrical equipment enclosures against foreign object intrusion) of the head-up display device.

[0078] The cooling mechanism 51, which achieves the above functions, is particularly suitable for scenarios where the cooling duct 50 is installed inside the head-up display (HUD) housing 70. This is because, in such cases, if the cooling mechanism 51 is configured to supply cooling gas into the cooling duct 50 via the air inlet 501 while simultaneously recovering gas from inside the housing 70 (i.e., the gas in the cooling duct 50 is discharged into the housing 70 via the air outlet 502), then the cooling mechanism 51 will only cool the gas inside the housing 70, resulting in a high workload for the cooling mechanism 51, or requiring a higher-power cooling mechanism 51. Therefore, by configuring the cooling mechanism 51 to supply cooling gas into the cooling duct 50 via the air inlet 501 while simultaneously recovering gas discharged from the air outlet 502, the workload of the cooling mechanism 51 can be reduced, improving cooling efficiency. Of course, in practical applications, the cooling mechanism 51, which achieves the above functions, can also be applied to scenarios where the cooling duct 50 is located outside the HUD housing 70.

[0079] It is easy to understand that, in the scenario where the cooling air duct 50 is located inside the housing 70 of the head-up display device, the position of the light source 100 (including but not limited to the backlight 10, the display panel 20 and the optical functional member 30) relative to the housing 70 can be as follows: in a first case, the backlight 10, the display panel 20 and the optical functional member 30 in the light source 100 are all located inside the housing 70, as shown in Figure 6 ; in a second case, the light source 100 is located above the cooling air duct 50 (including the cooling air duct 50), and all the components located above the cooling air duct 50 (including the cooling air duct 50) are located inside the housing 70, and the remaining components are located outside the housing 70, as shown in Figure 7 ; in a third case, the light source 100 is located above the cooling air duct 50 (including the cooling air duct 50), and all the components located above the cooling air duct 50 (including the cooling air duct 50) are located inside the housing 70, and part of all the components located below the cooling air duct 50 (not including the cooling air duct 50) are located inside the housing 70, and the remaining components are located outside the housing 70.

[0080] In order to achieve the above functions, as shown in Figure 6 and Figure 7 , the refrigeration mechanism 51 includes, for example: a circulating air duct 511, a power component 512 and a refrigeration device 513, wherein the air outlet end of the circulating air duct 511 is connected with the air inlet 501, and the air inlet end of the circulating air duct 511 is connected with the air outlet 502; the power component 512 is arranged in the circulating air duct 511, and is used to provide power for the circulation of the gas in the cooling air duct 50 and the circulating air duct 511; and the refrigeration device 513 is arranged in the circulating air duct 511, and is used to cool the gas flowing in the circulating air duct 511. Specifically, the circulating air duct 511 and the internal part of the cooling air duct 50 (i.e. the gas conveying space 503 shown in Figure 2 and Figure 3 ) form a closed channel, and the circulating air duct 511 is used to play the role of gas input and output. Under the action of the power provided by the power component 512, the gas can circulate in the closed channel, and at the same time, the refrigeration device 513 can cool the gas flowing in the closed channel, so as to realize that the gas entering the cooling air duct 50 is cooled gas.

[0081] In the scenario where the cooling air duct 50 is located inside the housing 70 of the head-up display device, in some examples, as shown in Figure 6 and Figure 7As shown, in order to integrate most of the components of the refrigeration mechanism 51 inside the shell 70, reduce the occupied space outside the shell 70, and reduce the overall occupied space of the HUD device, the circulating air duct 511 can be arranged inside the shell 70, and the power component 512 and the refrigerator 513 (e.g., a part of the refrigerator) are located inside the shell 70. The embodiments of the present application do not limit the extension and layout of the circulating air duct 511 inside the shell 70, as long as the circulating air duct 511 can form a closed passage with the cooling air duct 50, avoid the components inside the shell 70, and ensure that the components are not interfered, for example, the light path of the HUD needs to be avoided to ensure the light effect of the image light.

[0082] In other examples, the circulating air duct 511 can also be partially arranged outside the shell 70. In this case, at least one of the power component 512 and the refrigerator 513 can be located in the part of the circulating air duct 511 inside or outside the shell 70. That is, if a part of the circulating air duct 511 is arranged outside the shell 70, the power component 512 can be located in the part of the circulating air duct 511 inside or outside the shell 70, and the refrigerator 513 can also be located in the part of the circulating air duct 511 inside or outside the shell 70; that is, the power component 512 and the refrigerator 513 can be located inside or outside the shell 70, or one of them can be located inside the shell 70 and the other can be located outside the shell 70. In actual applications, the circulating air duct 511, the power component 512, and the refrigerator 513 can be flexibly selected according to the installation space inside and outside the shell 70, and the present application does not limit the installation positions of the three.

[0083] In order to provide power for the circulation of gas in the cooling air duct 50 and the circulating air duct 511, the power component 512 includes, for example, a supply fan, such as Figure 6 and Figure 7As shown, a blowing fan is arranged in the circulating air duct 511 for blowing air to the air inlet 501. In this case, the refrigerating device 513 is arranged in the circulating air duct 511 and located between the blowing side of the blowing fan and the air inlet 501, for cooling the air flowing from the blowing side of the blowing fan to the air inlet 501, so that the air entering the cooling air duct 50 is cooled air. The blowing fan is arranged, for example, inside the housing 70. Of course, in the case that a part of the above-mentioned circulating air duct 511 is arranged outside the housing 70, the blowing fan can also be arranged in the part of the circulating air duct 511 outside the housing 70. In other embodiments, the above-mentioned power component 512 can also include an exhaust fan arranged in the circulating air duct 511 for providing suction to the air in the cooling air duct 50 so that the air in the cooling air duct 50 is exhausted from the air outlet 502. In this case, the refrigerating device 513 is arranged in the circulating air duct 511 and located between the exhausting side of the exhaust fan and the air inlet 501, for cooling the air flowing from the exhausting side of the exhaust fan to the air inlet 501, so that the air entering the cooling air duct 50 is cooled air. The exhaust fan is arranged, for example, inside the housing 70. In yet other embodiments, the above-mentioned power component 512 can also include a blowing fan and an exhaust fan, in which case the above-mentioned refrigerating device 513 can be arranged in the circulating air duct 511 and located between the blowing side of the blowing fan and the air inlet 501, or the above-mentioned refrigerating device 513 can be arranged in the circulating air duct 511 and located between the exhausting side of the exhaust fan and the air inlet 501.

[0084] In the case that the cooling air duct 50 is located inside the housing 70 of the head-up display device, in yet other embodiments, as shown in FIG. 6, the power component 512 can be arranged in the housing 70, and the cooling air duct 50 can be arranged in the housing 70 and located between the power component 512 and the air inlet 501. Figure 8As shown, the refrigeration mechanism 51' is configured to provide cooling gas to the inside of the cooling air duct 50 through the air inlet 501, and the gas inside the housing 70 is recovered, while the gas inside the cooling air duct 50 is discharged into the housing 70 through the air outlet 502. In this case, the refrigeration mechanism 51' is configured to refrigerate the gas inside the housing 70, and a more powerful refrigeration device 513 is preferably used to ensure the cooling efficiency. The refrigeration mechanism 51' for achieving this function includes, for example, the refrigeration device 513 and the power component 512 (for example, a supply fan), wherein the air outlet end of the refrigeration device 513 is connected to the air inlet 501; the air inlet end of the refrigeration device 513 is connected to the air supply side of the supply fan; the supply fan is configured to supply air to the inside of the refrigeration device 513 through the air inlet end of the refrigeration device 513, and is for example installed inside the housing 70; the refrigeration device 513 is configured to cool the air from the supply fan and output the cooled air to the air inlet 501. Specifically, after the refrigeration device 513 outputs the cooled air, the cooled air enters the cooling air duct 50 through the air inlet 501, while the air in the cooling air duct 50 is discharged into the housing 70 through the air outlet 502. At the same time, the air inside the housing 70 is supplied to the refrigeration device 513 by the supply fan. Further, in order to facilitate the connection between the air outlet end of the refrigeration device 513 and the air inlet 501, the refrigeration mechanism 51' further includes, for example, an air inlet duct 514, wherein the air outlet end of the air inlet duct 514 is connected to the air inlet 501; the air inlet end of the air inlet duct 514 is connected to the air supply side of the supply fan; and the refrigeration device 513 is arranged in the air inlet duct 514. The air inlet duct 514 is configured to transport the air supplied by the supply fan to the cooling air duct 50, and the refrigeration device 513 is configured to cool the air in the air inlet duct 514 to ensure that the air entering the cooling air duct 50 is cooled air.

[0085] In some embodiments, as shown in Figure 6 to Figure 8 The refrigeration device 513 is a semiconductor refrigeration device, and the cold end 513b of the semiconductor refrigeration device is arranged in the circulating air duct 511 or the air inlet duct 514, and the hot end 513a of the semiconductor refrigeration device is arranged outside the housing 70. By arranging the hot end 513a of the semiconductor refrigeration device outside the housing 70, the heat generated by the hot end 513a can be directly transferred to the outside, and the heat dissipation effect is better. The semiconductor refrigeration device has the characteristics of no noise, no vibration, no refrigerant, small size, light weight, reliable operation, and simple operation, and is more suitable for scenes with small cooling capacity and small occupied space. Specifically, taking the case where the refrigeration device 513 is arranged in the air inlet duct 514 as an example, as shown in Figure 8 and Figure 9As shown, the hot end 513a of the cooler 513 includes a plurality of first fins 513a1 arranged at intervals, each of which is located outside the housing 70 and used to directly transfer the generated heat to the outside by heat exchange with the outside air. The cold end 513b of the cooler 513 is arranged, for example, at the air inlet end of the air inlet duct 514 and includes a plurality of second fins 513b1 arranged at intervals, each adjacent two of which form a passage through which air can pass, and the second fins 513b1 take away the heat of the air during the passage of the air through the passage, thereby cooling the air. In addition, the power component 512 (i.e., the air supply fan) is fixed to the air inlet side of the cold end 513b of the cooler 513 by the mounting bracket 512a and used to supply air to the passage formed between each of the second fins 513b1.

[0086] It should be noted that in the above embodiment in which the air inlet duct 514 is arranged, the air inlet duct 514, the air supply fan and the cooler 513 are all located inside the housing 70, but the embodiments of the present application are not limited thereto. In another embodiment, the air inlet end of the air inlet duct 514 can also extend to the outside of the housing 70, i.e., a part of the air inlet duct 514 is located outside the housing 70, and in this case, the air supply fan and the cooler 513 are also located outside the housing 70, and at this time, the air supply fan can supply the air outside the housing 70 into the air inlet duct 514, thereby improving the cooling efficiency relative to the embodiment in which the air supply fan is located inside the housing 70 and to a certain extent, reducing the power requirement of the cooler 513. Alternatively, in the case where the air supply fan is located outside the housing 70, the cooler 513 can also be omitted under the premise that the cooling efficiency meets the demand.

[0087] For the cooling air duct 50 in the case of being installed in the head-up display device, the scene in which the cooling air duct 50 is located outside the housing 70 of the head-up display device, such as Figure 10 and Figure 11As shown, the gas outside the shell 70 can be sent into the cooling air duct 50 to cool the display panel 20, and on the premise of ensuring the cooling efficiency, the gas outside the shell 70 does not need to be refrigerated, that is, the above-mentioned refrigerator 513 in the embodiment can be omitted. Specifically, in the scenario where the cooling air duct 50 is located outside the shell 70 of the head-up display device, in some embodiments, the cooling device 500 further comprises an exhaust fan 515 and an exhaust air duct 516, wherein the exhaust fan 515 is configured to be installed outside the shell 70; the air inlet end of the exhaust air duct 516 is connected with the air outlet 502; and the air outlet end of the exhaust air duct 516 is connected with the air inlet side of the exhaust fan 515. In this way, the gas in the cooling air duct 50 can be extracted by the exhaust fan 515 to the outside of the shell 70, and at the same time, the suction force provided by the exhaust fan 515 generates negative pressure at the air outlet 502, so that the gas outside the shell 70 is sucked into the cooling air duct 50 through the air inlet 501 under the action of the negative pressure for cooling. In other embodiments, the cooling device 500 can further comprise a supply fan and an air inlet duct, wherein the supply fan is configured to be installed outside the shell 70; the air outlet end of the air inlet duct is connected with the air inlet 501; and the air inlet end of the air inlet duct is connected with the air supply side of the supply fan. In this way, the supply fan can send the gas outside the shell 70 into the cooling air duct 50 through the air inlet duct, and at the same time, the gas in the cooling air duct 50 is discharged into the shell 70 through the air outlet 502. Of course, if the efficiency of directly sending the gas outside the shell 70 into the cooling air duct 50 for cooling does not meet the requirements, the refrigerator 513 can be additionally arranged in the above-mentioned exhaust air duct or air inlet duct, so as to ensure that the gas entering the cooling air duct 50 is cooled gas and improve the cooling efficiency.

[0088] In the embodiments where the cooling device 500 further comprises the exhaust fan 515 and the exhaust air duct 516, in order to integrate the exhaust air duct 516 and the exhaust fan 515 to improve the structural compactness and reduce the occupied space, as shown in FIG. 6, the exhaust air duct 516 is arranged in the form of a spiral air duct, and the exhaust fan 515 is arranged at the center of the spiral air duct. Figure 11 to Figure 13As shown, the exhaust air duct 516, for example, includes a plate-shaped body provided on the side of the optical functional component 30 and located on the side of the cooling air duct 50 away from the display panel 20; the plate-shaped body is provided with an exhaust air passage 516a, the air inlet end 516a1 of which is connected with the air outlet 502 on the side of the cooling air duct 50 away from the display panel 20; the exhaust air fan 515 is located on the side of the plate-shaped body away from the optical functional component 30, i.e. on the outside of the box body 60; the air outlet end 516a2 of the exhaust air passage 516a is connected with the air inlet side of the exhaust air fan 515 on the side of the plate-shaped body away from the optical functional component 30. Specifically, by adopting the plate-shaped exhaust air duct 516a, the exhaust air duct 516a and the exhaust air fan 515 can be integrated, reducing the occupied space. On this basis, the air outlet 502 is also improved, i.e. the air outlet 502 is a through hole penetrating the frame, one end of which penetrates to the inner side of the frame, and the other end penetrates to the side of the frame away from the display panel, so that the two ends of the through hole can respectively communicate the cooling air duct 50 and the exhaust air passage 516a located on the side of the cooling air duct 50 away from the display panel 20.

[0089] Further, in some embodiments, as shown in Figure 11 To further improve the integration of each component, reduce the number of components, improve the compactness of the structure, and reduce the occupied space, the plate-shaped body is part of the box body 60 of the head-up display device for accommodating the optical functional component 30. That is, the box body 60 is "multi-purpose", which not only provides accommodation space for the optical functional component 30, but also serves as the above-mentioned plate-shaped body to form the exhaust air passage 516a.

[0090] In the embodiments in which the cooling device 500 further includes the exhaust air fan 515 and the exhaust air duct 516, as shown in Figure 11 The cooling device 500, for example, further includes a heat sink 52, which, when installed in the head-up display device, is located on the side of the backlight 10 away from the optical functional component 30; the air outlet end of the heat sink 52 is connected with the air inlet side of the exhaust air fan 515. The heat sink 52 is used to dissipate heat from the backlight 10 to avoid excessive temperature of the backlight 10 and improve the service life of the backlight 10. The heat sink 52 is preferably installed outside the housing 70 to improve the heat dissipation efficiency. On this basis, by connecting the air outlet end of the heat sink 52 with the air inlet side of the exhaust air fan 515, the gas in the heat sink 52 can be extracted by the exhaust air fan 515, i.e. the heat sink 52 shares the same exhaust air fan 515 with the cooling air duct 50, thereby reducing the number of components, simplifying the device structure, and reducing power consumption.

[0091] Further, in some embodiments, in order to realize the convergence of the gas in the heat sink 52 and the gas in the exhaust air duct 516 towards the exhaust fan 515, the cooling device 500 further comprises an air cavity 517, which is located between the air outlet end of the heat sink 52 and the air outlet end of the exhaust air duct 516, and the air inlet side of the exhaust fan 515.

[0092] As another technical solution, the embodiment of the present application further provides a head-up display device, which comprises a display panel 20, an optical functional member 30 arranged on the side of the display panel 20 away from the light-emitting surface thereof, a backlight source 10 arranged on the side of the optical functional member 30 away from the display panel 20, and the above-mentioned cooling device 500 provided by the embodiment of the present application.

[0093] The head-up display device provided by the embodiment of the present application adopts the above-mentioned cooling device 500 provided by the embodiment of the present application, and accordingly, the head-up display device has all the advantages of the cooling device 500, which will not be described herein again.

[0094] In some embodiments, the head-up display device further comprises a housing 70, which is used to provide a containing space for at least part of the components of the backlight source 10. Moreover, the above-mentioned cooling device 500 can be arranged inside the housing 70 or outside the housing 70. Specifically, it can include but is not limited to the following several cases: in the first case, the display panel 20, the cooling device 500, the optical functional member 30 and the backlight source 10 are all located outside the housing 70; in the second case, the display panel 20, the cooling device 500, the optical functional member 30 and the backlight source 10 are all located inside the housing 70; in the third case, the display panel 20 and the cooling device 500 are both located inside the housing 70; the optical functional member 30 and the backlight source 10 are both located outside the housing 70; in the fourth case, the display panel 20 is located inside the housing 70; the cooling device 500, the optical functional member 30 and the backlight source 10 are all located outside the housing 70. In the above-mentioned several cases, for the scene in which the cooling air duct 50 is located inside or outside the housing 70 of the head-up display device, the cooling device 500 can adopt different structures, and since the structures have been described in detail in the above-mentioned embodiments, they will not be described herein again.

[0095] As another technical solution, the embodiment of the present application further provides a vehicle, which comprises the above-mentioned head-up display device provided by the embodiment of the present application.

[0096] The vehicle provided by the embodiment of the present application adopts the above-mentioned head-up display device provided by the embodiment of the present application, and accordingly, the vehicle has all the advantages of the cooling device 500 included in the head-up display device, which will not be described herein again.

[0097] It can be understood that the above embodiments are only exemplary embodiments for illustrating the principles of the present application, and the present application is not limited thereto. Various modifications and improvements can be made by those of ordinary skill in the art without departing from the spirit and essence of the present application, and these modifications and improvements are also considered to be within the protection scope of the present application.

Claims

1. A cooling device applied to a head-up display device, characterized by, The cooling device comprises a cooling air duct provided with an air inlet and an air outlet, and the cooling air duct is located between the display panel and the optical functional element of the head-up display device for conveying cooling gas.

2. Cooling device according to claim 1, characterized in that The cooling air duct comprises a frame body for mounting between the display panel and the optical functional element to maintain a preset distance between the surfaces of the display panel and the optical functional element. The frame body is annular, and the space surrounded by the frame body between the display panel and the optical functional element is used for conveying the cooling gas; the air inlet and the air outlet are arranged on opposite sides of the frame body.

3. Cooling device according to claim 2, characterized in that The frame body is provided with a first step portion near the surface of the display panel for supporting the edge of the display panel; and / or, The frame body is provided with a second step portion near the surface of the optical functional element for defining the position of the optical functional element.

4. Cooling device according to any of claims 1-3, characterized in that The cooling device further comprises a refrigeration mechanism for providing the cooling gas to the inside of the cooling air duct through the air inlet.

5. Cooling device according to claim 4, characterized in that The refrigeration mechanism comprises: a circulating air duct, the air outlet end of the circulating air duct is connected with the air inlet, and the air inlet end of the circulating air duct is connected with the air outlet; a power component arranged in the circulating air duct for providing power for the circulation of the gas in the cooling air duct and the circulating air duct; and a refrigerator arranged in the circulating air duct for cooling the gas flowing in the circulating air duct.

6. Cooling device according to claim 5, characterized in that The power component comprises a supply fan arranged in the circulating air duct for supplying air to the air inlet; the refrigerator is arranged in the circulating air duct and located between the air supply side of the supply fan and the air inlet for cooling the gas flowing from the air supply side of the supply fan to the air inlet; or, The power component comprises an exhaust fan arranged in the circulating air duct for providing suction to extract the gas in the cooling air duct from the air outlet; the refrigerator is arranged in the circulating air duct and located between the air outlet side of the exhaust fan and the air inlet for cooling the gas flowing from the air outlet side of the exhaust fan to the air inlet.

7. Cooling device according to claim 5 or 6, characterized in that The refrigerator is a semiconductor refrigerator, the cold end of the semiconductor refrigerator is arranged in the circulating air duct, and the hot end of the semiconductor refrigerator is arranged outside the shell of the head-up display device.

8. Cooling device according to claim 5 or 6, characterized in that The cooling air duct is located inside the shell of the head-up display device when mounted in the head-up display device; The circulating air duct, the power component and the refrigerator are all located inside the shell; or, Part of the circulating air duct is located outside the shell, and at least one of the power component and the refrigerator is located in the part of the circulating air duct inside or outside the shell.

9. The cooling device of claim 4, wherein, The refrigeration mechanism comprises a refrigeration device, a supply fan and an air inlet duct, wherein the air outlet end of the air inlet duct is connected with the air inlet; the air inlet end of the air inlet duct is connected with the air supply side of the supply fan; the supply fan supplies air to the air inlet through the air inlet duct; the refrigeration device is arranged in the air inlet duct to cool the air from the supply fan.

10. Cooling device according to claim 9, characterized in that The cooling air duct is located inside the housing of the head-up display device when installed in the head-up display device; The air inlet duct, the supply fan and the refrigeration device are all located inside the housing; or, Part of the air inlet duct is located outside the housing, and at least one of the supply fan and the refrigeration device is located in the part of the air inlet duct inside or outside the housing.

11. Cooling device according to any of claims 1-3, characterized in that The cooling air duct is located outside the housing of the head-up display device when installed in the head-up display device; The cooling device further comprises an exhaust fan and an exhaust air duct, wherein the exhaust fan is arranged outside the housing; the air inlet end of the exhaust air duct is connected with the air outlet; the air outlet end of the exhaust air duct is connected with the air inlet side of the exhaust fan; or, The cooling device further comprises a supply fan and an air inlet duct, wherein the supply fan is arranged outside the housing; the air outlet end of the air inlet duct is connected with the air inlet; the air inlet end of the air inlet duct is connected with the air supply side of the supply fan.

12. Cooling device according to claim 11, characterized in that The exhaust air duct comprises a plate-shaped main body arranged on the side of the optical functional component and located on the side of the cooling air duct away from the display panel; An exhaust passage is arranged in the plate-shaped main body, the air inlet end of the exhaust passage is connected with the air outlet on the side of the cooling air duct away from the display panel; the exhaust fan is located on the side of the plate-shaped main body away from the optical functional component; the air outlet end of the exhaust passage is connected with the air inlet side of the exhaust fan on the side of the plate-shaped main body away from the optical functional component.

13. Cooling device according to claim 12, characterized in that The plate-shaped main body is part of the box body of the head-up display device for accommodating the optical functional component.

14. The cooling device of claim 11, wherein, The cooling device further comprises a heat sink, which is located on the side of the backlight away from the optical functional component when installed in the head-up display device; The air outlet end of the heat sink is connected with the air inlet side of the exhaust fan.

15. Cooling device according to claim 14, characterized in that The cooling device further comprises a wind cavity between the air outlet end of the heat sink and the air outlet end of the exhaust air duct and the air inlet side of the exhaust fan.

16. A head-up display device, characterized by The head-up display device comprises a display panel, an optical functional component arranged on the side of the display panel away from the light-emitting surface, a backlight arranged on the side of the optical functional component away from the display panel, and a cooling device as claimed in any one of claims 1-15.

17. The head-up display device of claim 16, wherein, Further comprising a housing; The display panel, the cooling device, the optical functional component and the backlight are all located outside the housing; or, The display panel, the cooling device, the optical functional component and the backlight are all located inside the housing; or, The display panel and the cooling device are both located inside the shell; the optical functional piece and the backlight source are both located outside the shell; or, The display panel is located inside the shell; the cooling device, the optical functional piece and the backlight source are all located outside the shell.

18. A vehicle characterized by comprising: Comprise: The head-up display device of claim 16 or 17.

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