Head-up display device and vehicle

Abstract

The embodiment of the utility model relates to the technical field of heat dissipation, and particularly discloses a head-up display device and a vehicle, the head-up display device comprises a shell provided with an accommodating cavity and a first window, and the first window is communicated with the accommodating cavity; the image generation unit is accommodated in the accommodating cavity, and the image generation unit is used for generating an output image; the projection assembly is accommodated in the accommodating cavity and is used for projecting the output image generated by the image generation unit to the outside through the first window; and the piezoelectric film radiator is arranged on the image generation unit, so that the piezoelectric film radiator is used for radiating heat of the image generation unit. Through the above mode, according to the embodiment of the utility model, the piezoelectric film radiator can be applied to the head-up display device, the volume of the head-up display device is reduced by utilizing the characteristics of small volume, high heat dissipation efficiency and low noise of the piezoelectric film radiator, and the use experience of the head-up display device is improved.

Description

Technical Field

[0001] This utility model relates to the field of antenna technology, and in particular to a head-up display device and a vehicle. Background Technology

[0002] Head-up displays (HUDs) are commonly used automotive aids that connect to a vehicle and project relevant driving information onto the windshield. Drivers can view this information, such as speed, simply by looking at the windshield. An HUD consists of a housing, optical components, and a backlight assembly. The backlight provides the light source, which is then used to generate an image. This image is then reflected by multiple lenses within the optical assembly before being projected onto the windshield.

[0003] In the process of realizing this utility model, the inventors of this utility model discovered that: Currently, head-up display devices include a housing, an optical component, a backlight component, and a heat dissipation component. The housing is provided with a receiving cavity, and the optical component, the backlight component, and the heat dissipation component are all housed in the receiving cavity. The heat dissipation component is usually a heat sink, but the existing ordinary heat sink is too large, which makes the head-up display device too large and is not conducive to the concealment of the head-up display device on vehicles. Utility Model Content

[0004] This utility model provides a head-up display device and a vehicle, and the main technical problem it solves is that the head-up display device is too large and not easy to hide.

[0005] To solve the above-mentioned technical problems, the present invention provides a head-up display device, including a housing with a receiving cavity and a first window, the first window communicating with the receiving cavity; an image generation unit housed in the receiving cavity, the image generation unit being used to generate an output image; a projection component housed in the receiving cavity, used to project the output image generated by the image generation unit to the outside through the first window; and a piezoelectric thin film heat sink disposed in the image generation unit, so that the piezoelectric thin film heat sink is used to dissipate heat from the image generation unit.

[0006] Optionally, the housing is provided with a heat dissipation through hole, which communicates with the receiving cavity, and one side of the piezoelectric thin film heat sink faces the heat dissipation through hole, so that the airflow generated by the piezoelectric thin film heat sink is discharged from the heat dissipation through hole.

[0007] Optionally, the housing includes an upper shell, a lower shell, a heat dissipation shell, and a light-transmitting cover. The first window is disposed on the upper shell, and the light-transmitting cover covers the first window. The heat dissipation shell is detachably or integrally connected to the lower shell. The heat dissipation through hole is disposed on the heat dissipation shell. The upper shell, the lower shell, and the heat dissipation shell together enclose the receiving cavity. The heat dissipation shell is provided with a receiving groove, and the piezoelectric thin film heat sink is received in the receiving groove.

[0008] Optionally, the piezoelectric thin film heat sink includes a thin film housing and a plurality of vibration units; the thin film housing is provided with a vibration chamber, an air inlet and an air outlet, the air inlet and the air outlet are both connected to the vibration chamber, the plurality of vibration units are housed in the vibration chamber, and the plurality of vibration units are used to drive airflow from the air inlet into the vibration chamber through vibration and output from the air outlet.

[0009] Optionally, the image generation unit includes a backlight assembly; the head-up display device includes a thermally conductive adhesive layer disposed between the piezoelectric thin film heat sink and the backlight assembly, one side of the thermally conductive adhesive layer being bonded to the other side of the piezoelectric thin film heat sink, and the other side of the thermally conductive adhesive layer being bonded to the backlight assembly, so that the piezoelectric thin film heat sink is fixed to the backlight assembly.

[0010] Optionally, the thermally conductive adhesive layer is thermally conductive silicone grease or thermally conductive gel.

[0011] Optionally, the projection assembly includes a driving assembly and an optical assembly. The driving assembly is housed in the receiving cavity and connected to the optical assembly. The driving assembly is used to drive the optical assembly to rotate.

[0012] Optionally, the head-up display device further includes a light-shielding component; the image generation unit further includes a display component; the optical component includes a first lens and a second lens, the display component is fixed to the first window, the display component corresponds to the first lens at a first angle, the light-shielding component covers the space between the display component and the first lens, the second lens corresponds to the first lens at a second angle, and the second lens is rotatably disposed within the receiving cavity.

[0013] Optionally, the second lens includes a first rotating shaft and a second rotating shaft disposed opposite to each other, the first rotating shaft being disposed at one end of the second lens and the second rotating shaft being disposed at the other end of the second lens; the housing is provided with a first support platform and a second support platform, the first support platform being provided with a first rotating groove and the second support platform being provided with a second rotating groove, the first rotating shaft being received in the first rotating groove and the second rotating shaft being received in the second rotating groove; the drive assembly includes a circuit board and a drive component electrically connected to each other, the drive component being connected to the first rotating shaft and / or the second rotating shaft.

[0014] To solve the above-mentioned technical problems, another technical solution adopted by this utility model is to provide a means of transportation that includes the above-mentioned head-up display device.

[0015] The beneficial effects of this utility model embodiment are as follows: Unlike existing technologies, this utility model embodiment provides a head-up display device, including: a housing, an image generation unit, a projection component, and a piezoelectric thin-film heat sink. The housing has a receiving cavity and a first window, the first window communicating with the receiving cavity. The image generation unit is housed in the receiving cavity and is used to generate an output image. The projection component is housed in the receiving cavity and is used to project the output image generated by the image generation unit to the outside through the first window. The piezoelectric thin-film heat sink is disposed on the image generation unit so that it can dissipate heat from the image generation unit. Through the above structure, this utility model embodiment can replace the existing heat sink with a piezoelectric thin film, simplifying the structure of the head-up display device, reducing its size, and facilitating its concealment within a vehicle. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0017] Figure 1 This is an exploded structural diagram of the head-up display device provided in this embodiment of the utility model;

[0018] Figure 2 This is an assembly diagram of the head-up display device provided in this embodiment of the utility model;

[0019] Figure 3 This is an enlarged schematic diagram of a backlight circuit board with a piezoelectric thin film heat sink provided in an embodiment of this utility model;

[0020] Figure 4 This is a schematic diagram of the head-up display device provided in this embodiment of the present invention with the upper shell removed;

[0021] Figure 5 This is a schematic diagram of the drive assembly and the second lens of the head-up display device provided in this embodiment of the present invention.

[0022] Icon labels:

[0023] 1000. Head-up display device;

[0024] 1. Housing; 11. Receiving cavity; 12. First window; 13. Heat dissipation hole; 14. First support platform; 15. Second support platform; 1a. Upper shell; 1b. Lower shell; 1c. Light-transmitting cover; 1d. Heat dissipation shell;

[0025] 2. Image generation unit; 21. Backlight assembly; 211. Backlight circuit board; 212. Light modulation lens; 22. Display component;

[0026] 3. Projection assembly; 31. Drive assembly; 311. Motor; 312. Worm gear; 313. Worm; 32. Optical assembly; 321. First lens; 322. Second lens; 3221. First rotating shaft; 3222. Second rotating shaft;

[0027] 4. Piezoelectric thin film heat sink;

[0028] 5. Thermally conductive adhesive layer;

[0029] 6. Sunshade components. Detailed Implementation

[0030] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this specification are for illustrative purposes only.

[0031] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0032] Currently, head-up displays (HUDs) on the market can be divided into three main categories based on their imaging methods and forms: Combiner HUDs (C-HUDs), Windshield 4HUDs (W-HUDs), and Augmented Reality HUDs (AR-HUDs). However, regardless of the imaging method, HUDs inevitably generate heat during operation. As electronic devices, heat accumulation can affect operational stability. A common heat dissipation method is to add an aluminum heat sink inside the HUD, using thermal grease or other heat-conducting media to transfer heat from the heat-generating components to the heat sink. However, the inherent size limitations of ordinary aluminum heat sinks result in large HUDs, hindering their installation and application in the limited space of vehicles.

[0033] To address the aforementioned problems, this invention provides a heads-up display device 1000 incorporating a piezoelectric thin-film heat sink. (Please refer to...) Figure 1 and Figure 2 The head-up display device 1000 includes: a housing 1, an image generating unit 2, a projection component 3, and a piezoelectric thin-film heat sink 4. Specifically, the housing 1 is provided with a receiving cavity 11 and a first window 12, the first window 12 being connected to the receiving cavity 11; the image generating unit 2 is housed in the receiving cavity 11 and is used to generate image light; the projection component 3 is housed in the receiving cavity 11 and is used to project the image light generated by the image generating unit 2 to the outside through the first window 12; the piezoelectric thin-film heat sink 4 is disposed on the heat source side of the image generating unit 2 so that the piezoelectric thin-film heat sink 4 dissipates heat from the image generating unit 2. Through the above structure, this embodiment can apply the piezoelectric thin-film heat sink 4 to the head-up display device 1000, utilizing the small size, high heat dissipation efficiency, and low noise characteristics of the piezoelectric thin-film heat sink 4 to reduce the size of the head-up display device 1000, improve the heat dissipation efficiency of the head-up display device 1000, ensure the working stability of the head-up display device 1000, facilitate the concealment of the head-up display device 1000, and improve the user experience of the head-up display device 1000.

[0034] Understandably, the role of the projection component 3 is to reflect and adjust the projection angle of the output image generated by the image generation unit 2 so that the output image can be adapted to the display angle requirements of different users.

[0035] It should be noted that the head-up display device 1000 without a piezoelectric thin film heat sink 4 relies on the natural convection of the heating element (i.e., the backlight assembly 21) inside the housing 1 with the surrounding air for heat dissipation, which is a passive heat dissipation method. This passive heat dissipation method is not very efficient. However, the head-up display device 1000 with an active heat sink (i.e., the piezoelectric thin film heat sink 4) relies on the airflow generated by the active heat sink to carry away the heat of the heating element and dissipate it to the surrounding environment, thereby improving the heat dissipation efficiency of the head-up display device 1000. Furthermore, based on the airflow path of the head-up display device 1000, the head-up display device 1000 with an active heat sink can be divided into an internal circulation heat dissipation method and an external circulation heat dissipation method.

[0036] In some preferred embodiments, the head-up display device 1000 employs an external circulation cooling method. For details, please refer to [link / reference needed]. Figure 1 The housing 1 is provided with a heat dissipation hole 13, which communicates with the receiving cavity 11, allowing the receiving cavity 11 to communicate with the outside world. One side of the piezoelectric thin film heat sink 4 faces the heat dissipation hole 13, so that the airflow generated by the piezoelectric thin film heat sink 4 can be discharged through the heat dissipation hole 13. The piezoelectric thin film heat sink 4 increases the flow speed of the airflow from the receiving cavity 11 through the heat dissipation hole 13 to the external environment, optimizes the airflow direction formed by the piezoelectric thin film heat sink 4, and improves the heat dissipation efficiency of the piezoelectric thin film heat sink 4. With the above structure, this utility model can remove the heat from the housing 1 from the receiving cavity 11 by airflow, thereby enhancing the heat dissipation efficiency of the head-up display device 1000 and improving the user experience of the head-up display device 1000.

[0037] For the piezoelectric thin-film heat sinks mentioned above, please refer to... Figure 1 The piezoelectric thin film heat sink 4 includes a thin film housing (not shown) and several vibration units (not shown in the figure); the thin film housing is provided with a vibration chamber (not shown), an air inlet (not shown) and an air outlet (not shown), both of which are connected to the vibration chamber. Several vibration units are housed in the vibration chamber and are used to drive airflow from the air inlet into the vibration chamber through vibration and output from the air outlet.

[0038] To facilitate understanding of the working principle of the piezoelectric thin-film heat sink 4, a brief introduction is provided here. The vibration unit is a piezoelectric thin film. When a voltage is applied to the piezoelectric thin film, it deforms due to the piezoelectric effect, thereby generating vibration. This vibration occurs at ultrasonic frequencies, generating a powerful airflow. This airflow draws in cool air through the air inlet, then passes through the internal heat dissipation channels, carrying away the heat accumulated inside the device, and finally exhausts the hot air from the air outlet.

[0039] For the image generation unit 2 mentioned above, please refer to Figure 1The image generation unit 2 includes a backlight assembly 21, which is the main heat-generating structure of the image generation unit 2. The head-up display device 1000 includes a thermally conductive adhesive layer 5, which is disposed between the piezoelectric thin film heat sink 4 and the backlight assembly 21. One side of the thermally conductive adhesive layer 5 is bonded to the other side of the piezoelectric thin film heat sink 4, and the other side of the thermally conductive adhesive layer 5 is bonded to the backlight assembly 21, so that the piezoelectric thin film heat sink 4 is fixed to the backlight assembly 21. Moreover, the thermally conductive adhesive layer 5, relying on its excellent thermal conductivity, can quickly and evenly transfer the heat of the backlight assembly 21 to the piezoelectric thin film heat sink 4, thereby ensuring the optimal heat dissipation efficiency of the piezoelectric thin film heat sink 4.

[0040] For the backlight assembly 21 mentioned above, please refer to... Figure 1 and Figure 3 The backlight assembly 21 includes a backlight circuit board 211, a light modulation lens 212, and a light source (not shown). The light source is fixed on the backlight circuit board 211, which provides power to the light source. The backlight circuit board 211 also controls the on / off state of the current output to the light source and the magnitude of the output power. The light modulation lens 212 is correspondingly positioned to the light source, enabling it to perform shaping, diffusion, collimation, and homogenization modulation processes on the light output from the light source. Furthermore, since the light source serves as the actual heat source of the backlight assembly 21, a piezoelectric thin-film heat sink 4 is disposed on the side of the backlight circuit board 211 facing away from the light source to improve the heat dissipation efficiency of the backlight assembly 21 and ensure a stable operating environment for the backlight assembly 21.

[0041] Understandably, the aforementioned thermally conductive adhesive layer 5 should be made of a material with high thermal conductivity and adhesion, including but not limited to: thermally conductive double-sided tape, silicone-based thermally conductive materials, non-silicone-based thermally conductive materials, thermally conductive grease, and thermally conductive gel. The selection of the thermally conductive adhesive layer 5 can be one or a combination of two or more of the aforementioned materials.

[0042] In some embodiments, please refer to Figure 4 The projection component 3 includes a drive component 31 and an optical component 32. The drive component 31 is housed in the housing cavity 11 and is connected to the optical component 32. The drive component 31 is used to drive the optical component 32 to rotate. By driving the optical component 32 to rotate, the output image of the head-up display device 1000 can be adjusted, thereby meeting the usage needs of different users of the head-up display device 1000.

[0043] In some embodiments, please refer to Figure 1The head-up display device 1000 also includes a light-shielding member 6; the image generation unit 2 also includes a display member 22; the optical component 32 includes a first lens 321 and a second lens 322. The display member 22 is fixed to the first window 12, and the display member 22 and the first lens 321 are at a first angle, so that the first lens 321 deflects the output image at the required angle. The light-shielding member 6 covers the space between the display member 22 and the first lens 321 to block external light from entering the space and to block stray light from entering the space, thus avoiding interference from stray light on the image, thereby significantly improving the image clarity, color reproduction and contrast, making the displayed image more realistic and delicate. The second lens 322 is at a second angle to the first lens 321, so that the output image deflected by the first lens 321 is deflected a second time, thereby projecting it to the outside through the first window 12. The second lens 322 is rotatably disposed in the receiving cavity 11.

[0044] It should be noted that the setting of the first angle and the second angle is determined by the specific positions of the first lens 322 and the second lens 321 within the receiving cavity 11. As long as the image of the image generation unit 2 can be smoothly projected from the first window 12 according to the preset trajectory, the specific angle data will not be described in detail in this embodiment.

[0045] For the structure that enables the second lens to rotate, please refer to [link / reference]. Figure 4 The second lens 322 includes a first rotating shaft 3221 and a second rotating shaft 3222 disposed opposite to each other. The first rotating shaft 3221 is disposed at one end of the second lens 322, and the second rotating shaft 3222 is disposed at the other end of the second lens 322. The housing 1 is provided with a first support platform 14 and a second support platform 15. The first support platform 14 is provided with a first rotating groove (not shown), and the second support platform 15 is provided with a second rotating groove (not shown). The first rotating shaft 3221 is received in the first rotating groove, and the second rotating shaft 3222 is received in the second rotating groove.

[0046] Furthermore, to ensure that the first rotating shaft 3221 is housed in the first rotating groove and the second rotating shaft 3222 is housed in the second rotating groove, and that the first rotating shaft 3221 and the second rotating shaft 3222 do not undergo unexpected displacement, the projection assembly 3 also includes a first holding member (not shown) and a second holding member (not shown). The first holding member covers the opening of the first rotating groove and abuts against the first rotating shaft 3221, and the second holding member covers the second rotating groove and abuts against the second rotating shaft 3222. Through the limiting constraint of the first rotating shaft 3221 by the first holding member and the groove wall of the first rotating groove, and the limiting constraint of the second rotating shaft 3222 by the second holding member and the groove wall of the second rotating groove, it is ensured that the first rotating shaft 3221 and the second rotating shaft 3222 do not undergo unexpected displacement or shaking during rotation, thereby improving the rotational stability of the first rotating shaft 3221 and the second rotating shaft 3222.

[0047] It is understood that the drive assembly 31 may be configured to implement the drive structure, including but not limited to: gears and reducers, worm gears and worms, racks and gears, etc. For example, in this embodiment, the drive assembly 31 uses a worm gear and worm structure.

[0048] In order to achieve the above-mentioned rotation of the second lens 322, in some embodiments the drive assembly 31 includes an electrically connected circuit board (not shown) and a drive member. The circuit board is used to control the rotation speed of the drive member, the forward and reverse rotation of the output shaft of the drive member, etc. The drive member is connected to the first rotating shaft 3221 and / or the second rotating shaft 3222. For example, in this embodiment, the drive member is rotatably connected to the second rotating shaft 3222.

[0049] For details, please refer to Figure 5 The driving components include a motor 311, a worm gear 312, and a worm 313. The worm 313 is fixed to the output shaft of the motor 311, and the worm gear 312 is fixed to the projection assembly 3. For example, the worm gear 312 is fixed to the second lens 322. The worm gear 312 meshes with the worm 313. The motor 311 drives the worm 313 to rotate, thereby driving the worm gear 312 to rotate, which in turn drives the second lens 322 to rotate, so that the output image projected by the projection assembly 3 is deflected at an angle. Due to the reverse stroke self-locking property of the worm gear 312 and the worm 313 (i.e., only the worm gear 313 can drive the worm gear 312, and the worm gear 312 cannot drive the worm 313), it is ensured that the angle of projection by the driving assembly 31 driving the projection assembly 3 is accurate and is not easily affected by external forces, resulting in unexpected deflection angle wobbling, thus ensuring the user experience of the head-up display device 1000.

[0050] It should be noted that the deflection angle of the projection component 3 is determined by factors such as the rotation speed and rotation time of the motor 311 and the lead angle of the worm gear 313. Users can select and match according to their actual needs. This embodiment will not provide examples of each factor.

[0051] In some embodiments, please refer to Figure 1The housing 1 includes an upper shell 1a, a lower shell 1b, a heat dissipation shell 1d, and a light-transmitting cover 1c. A first window 12 is disposed on the upper shell 1a, and the light-transmitting cover 1c covers the first window 12. The light-transmitting cover 1c allows light to pass through and also serves to prevent dust and water penetration, protecting the components housed in the receiving cavity 11. The heat dissipation shell 1d is detachable or integrally connected to the lower shell 1b, and a heat dissipation through hole 13 is disposed on the heat dissipation shell 1d. For example, in this embodiment, the heat dissipation shell 1d is detachably disposed on the lower shell 1b to facilitate the disassembly, assembly, and maintenance of the piezoelectric thin film heat sink 4. The upper shell 1a and the lower shell 1b... 1b together form a receiving cavity 11; the heat dissipation shell 1d is provided with a receiving groove (not shown), which is connected to the receiving cavity 11. The piezoelectric thin film heat sink 4 and at least part of the image generation unit 2 are housed in the receiving groove. By placing at least part of the image generation unit 2 (referring to the main heat-generating components, such as the backlight circuit board and the light source) outside the receiving groove, the heat dissipation efficiency is significantly higher than that of the image generation unit 2, which is directly cooled by the piezoelectric thin film heat sink 4 in the receiving cavity 11, thus ensuring the stability of the head-up display device 1000.

[0052] It is understood that the heat sink 1d can be detachably connected to the lower shell 1b in ways including but not limited to: screw connection, snap connection, etc. In some embodiments, a sealing element (not shown) is provided at the connection position between the heat sink 1d and the lower shell 1b, and the heat sink 1d and the lower shell 1b together clamp the sealing element to improve the sealing performance of the connection between the heat sink 1d and the lower shell 1b.

[0053] It should be noted that the head-up display device 1000 also includes a main control board (not shown), which is housed in the receiving cavity 11. The main control board is electrically connected to the image generation unit 2, the projection component 3, and the piezoelectric thin film heat sink 4. The main control board is used to provide a medium for the image generation unit 2, the projection component 3, and the piezoelectric thin film heat sink 4 to communicate with the outside world for power and exchange information. The main control board can also control the image content displayed by the image generation unit 2, control the rotation angle of the projection component, and control the working time and operating power of the piezoelectric thin film heat sink 4.

[0054] In this embodiment, the head-up display device 1000 includes: a housing 1, an image generating unit 2, a projection component 3, a piezoelectric thin film heat sink 4, a thermally conductive adhesive layer 5, and a light-shielding component 6. The housing 1 is provided with a receiving cavity 11 and a first window 12, which communicates with the receiving cavity 11. The image generating unit 2, the projection component 3, and the piezoelectric thin film heat sink 4 are all housed in the receiving cavity 11. The image generating unit 2 and the projection component 3 are correspondingly arranged. The image generating unit 2 is used to generate an output image, and then the projection component 3 projects the output image generated by the image generating unit 2 to the outside through the first window 12. The light-shielding component 6 covers the gap area between the image generating unit 2 and the projection component 3, thereby blocking external light from entering the gap area and preventing external light from affecting the transmission of the output image. A piezoelectric thin-film heat sink 4 is disposed on the image generation unit 2 to dissipate heat from the image generation unit 2. A thermally conductive adhesive layer 5 is disposed between the image generation unit 2 and the piezoelectric thin-film heat sink to directly transfer the heat generated by the image generation unit 2 to the piezoelectric thin-film heat sink 4, thereby accelerating the heat dissipation of the image generation unit 2. By using the piezoelectric thin-film heat sink 4, the volume required for the heat sink within the head-up display device 1000 is reduced, thus reducing the size of the head-up display device 1000 and facilitating its concealment within a vehicle.

[0055] This utility model also provides a vehicle embodiment, which includes the head-up display device 1000 described above. For the specific structure and function of the head-up display device 1000, please refer to the above embodiment, which will not be repeated here.

[0056] It should be noted that while the preferred embodiments of this utility model are provided in the specification and accompanying drawings, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to impose additional limitations on the content of this utility model; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Furthermore, the above-described technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of this utility model specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A head-up display device, characterized in that, include: The housing has a receiving cavity and a first window, the first window being in communication with the receiving cavity; An image generation unit is housed in the receiving cavity, and the image generation unit is used to generate an output image; A projection component, housed in the receiving cavity, is used to project the output image generated by the image generation unit to the outside through the first window; A piezoelectric thin film heat sink is disposed on the heat source side of the image generation unit so that the piezoelectric thin film heat sink can dissipate heat from the image generation unit.

2. The head-up display device according to claim 1, characterized in that, The housing is provided with heat dissipation holes, which are connected to the receiving cavity. One side of the piezoelectric thin film heat sink faces the heat dissipation holes, so that the airflow generated by the piezoelectric thin film heat sink can be discharged from the heat dissipation holes.

3. The head-up display device according to claim 2, characterized in that, The housing includes an upper shell, a lower shell, a heat dissipation shell, and a light-transmitting cover. The first window is disposed on the upper shell, and the light-transmitting cover covers the first window. The heat dissipation shell is detachable or integrally connected to the lower shell. The heat dissipation through hole is disposed on the heat dissipation shell. The upper shell, the lower shell, and the heat dissipation shell together enclose the receiving cavity. The heat sink is provided with a receiving groove, which is connected to the receiving cavity, and the piezoelectric thin film heat sink is housed in the receiving groove.

4. The head-up display device according to claim 2, characterized in that, The piezoelectric thin film heat sink includes a thin film housing and several vibration units; The thin film housing is provided with a vibration chamber, an air inlet and an air outlet. The air inlet and the air outlet are both connected to the vibration chamber. The plurality of vibration units are housed in the vibration chamber. The plurality of vibration units are used to drive airflow into the vibration chamber through the air inlet and output it from the air outlet.

5. The head-up display device according to claim 1, characterized in that, The image generation unit includes a backlight component; The head-up display device includes a thermally conductive adhesive layer disposed between the piezoelectric thin film heat sink and the backlight assembly. One side of the thermally conductive adhesive layer is bonded to the other side of the piezoelectric thin film heat sink, and the other side of the thermally conductive adhesive layer is bonded to the backlight assembly, so that the piezoelectric thin film heat sink is fixed to the backlight assembly.

6. The head-up display device according to claim 5, characterized in that, The thermally conductive adhesive layer is thermally conductive silicone grease or thermally conductive gel.

7. The head-up display device according to claim 1, characterized in that, The projection assembly includes a driving assembly and an optical assembly. The driving assembly is housed in the receiving cavity and connected to the optical assembly. The driving assembly is used to drive the optical assembly to rotate.

8. The head-up display device according to claim 7, characterized in that, The head-up display device also includes a light-shielding component; The image generation unit also includes a display component; The optical component includes a first lens and a second lens. The display is fixed to the first window. The display is at a first angle to the first lens. The light shield covers the space between the display and the first lens. The second lens is at a second angle to the first lens. The second lens is rotatably disposed within the receiving cavity.

9. The head-up display device according to claim 8, characterized in that, The second lens includes a first rotating shaft and a second rotating shaft disposed opposite to each other, the first rotating shaft being disposed at one end of the second lens and the second rotating shaft being disposed at the other end of the second lens; The housing is provided with a first support platform and a second support platform. The first support platform is provided with a first rotating groove, and the second support platform is provided with a second rotating groove. The first rotating shaft is received in the first rotating groove, and the second rotating shaft is received in the second rotating groove. The drive assembly includes an electrically connected circuit board and a drive element, the drive element being connected to the first rotating shaft and / or the second rotating shaft.

10. A means of transportation, characterized in that, Includes the head-up display device as described in any one of claims 1-9.

Images