Electromagnetic shielding structure and vehicle-mounted HUD device

Abstract

The utility model relates to the technical field of HUD display, in particular to an electromagnetic shielding structure and a vehicle-mounted HUD device.The electromagnetic shielding structure comprises a first conductive shielding cover and a second conductive shielding cover, the first conductive shielding cover is attached to the light emitting side of an HUD screen, and a hollow part is formed in the first conductive shielding cover; the HUD screen is provided with a light emitting area, and the coverage area of the hollow part coincides with that of the light emitting area; and the second conductive shielding cover covers the backlight side of the HUD screen and is in contact with the first conductive shielding cover. According to the embodiment of the invention, the electromagnetic protection performance of the HUD screen can be effectively improved, and normal work of the HUD screen in a complex electromagnetic environment is ensured.

Description

Technical Field

[0001] This application relates to the field of HUD display technology, and more specifically, to an electromagnetic shielding structure and an in-vehicle HUD device. Background Technology

[0002] A head-up display (HUD) is a technology that projects important information directly into the driver's line of sight, allowing them to access crucial information without looking down at the instrument panel or central control screen. With the development of new energy vehicles, these vehicles are equipped with numerous electronic control systems. These systems must be able to operate stably in complex electromagnetic environments to avoid malfunctions or misoperations caused by external electromagnetic interference, thus ensuring the safety of drivers and passengers. Currently, HUD screens on the market typically use thin-film transistors (TFTs), which lack any external electromagnetic shielding. Therefore, HUD screens are highly susceptible to external electromagnetic interference. Poor electromagnetic protection performance can significantly impact display quality, data transmission, and system stability, leading to noise, stripes, or other abnormal patterns on the screen, thereby threatening driving safety. Utility Model Content

[0003] The purpose of this application is to provide an electromagnetic shielding structure and a vehicle-mounted HUD device, which can effectively improve the electromagnetic protection performance of the HUD screen and ensure its normal operation in complex electromagnetic environments.

[0004] The embodiments of this application are implemented as follows:

[0005] On one hand, this application provides an electromagnetic shielding structure, including a first conductive shielding cover and a second conductive shielding cover. The first conductive shielding cover is attached to the light-emitting side of the HUD screen, and a hollow portion is formed on the first conductive shielding cover. The HUD screen has a light-emitting area, and the area covered by the hollow portion coincides with the light-emitting area. The second conductive shielding cover covers the backlight side of the HUD screen and is in contact with the first conductive shielding cover.

[0006] As an optional implementation, the first conductive shielding cover includes a conductive foam layer, and the conductive foam layer has an adhesive backing on the side near the HUD screen. The conductive foam layer connects the second conductive shielding cover and the HUD screen through the adhesive backing.

[0007] As an optional implementation, the HUD screen has a non-light-emitting area circumferentially surrounding the light-emitting area; the adhesive backing is continuously disposed along the non-light-emitting area, and the conductive foam layer is bonded to the non-light-emitting area through the adhesive backing.

[0008] As an optional implementation, it also includes a screen support frame; the side of the second conductive shielding cover facing away from the HUD screen is attached to the screen support frame; the backlight side of the HUD screen is attached to the second conductive shielding cover.

[0009] As an optional implementation, the second conductive shielding cover has a plurality of positioning holes arranged circumferentially at intervals; the screen support frame is provided with a plurality of positioning structures, and the plurality of positioning structures respectively pass through the plurality of positioning holes.

[0010] As an optional implementation, at least two of the positioning structures are provided with card slots; the HUD screen is provided with a card receiving part that is connected to the card slots.

[0011] As an optional implementation, it also includes an LED cable; one end of the LED cable is in contact with the conductive foam layer, and the other end is used to connect to the grounding cable of the motherboard.

[0012] As an optional implementation, the first conductive shielding cover is a black structural component.

[0013] As an optional implementation, the second conductive shielding cover has a recessed platform; the HUD screen is embedded in the recessed platform, and the light-emitting surface of the HUD screen is flush with the opening surface of the recessed platform.

[0014] On the other hand, this embodiment provides an in-vehicle HUD device, including the above-mentioned electromagnetic shielding structure, HUD screen and motherboard; the motherboard is electrically connected to the HUD screen.

[0015] The beneficial effects of the embodiments of this application include:

[0016] This application provides an electromagnetic shielding structure, including a first conductive shielding cover and a second conductive shielding cover. The first conductive shielding cover is attached to the light-emitting side of the HUD screen, and a cutout portion is formed on the first conductive shielding cover. The HUD screen has a light-emitting area, and the area covered by the cutout portion overlaps with the light-emitting area. The second conductive shielding cover covers the backlight side of the HUD screen and is in contact with the first conductive shielding cover. This application can optimize the user experience. Through effective electromagnetic shielding measures, it can ensure that the HUD system can work stably even in complex electromagnetic environments, providing clear and accurate information display, thereby optimizing the user's driving experience. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is one of the structural schematic diagrams of the electromagnetic shielding structure in the embodiments of this application;

[0019] Figure 2 This is a second schematic diagram of the electromagnetic shielding structure according to an embodiment of this application;

[0020] Figure 3 This is the third schematic diagram of the electromagnetic shielding structure in the embodiments of this application;

[0021] Figure 4 This is the fourth schematic diagram of the electromagnetic shielding structure in the embodiments of this application.

[0022] icon:

[0023] 100-First conductive shielding cover; 101-Second conductive shielding cover; 102-HUD screen; 103-Kuaiku section; 104-Light-emitting area; 105-Conductive foam layer; 106-Non-light-emitting area; 107-Screen support frame; 108-Positioning hole; 109-Positioning structure; 110-Card slot; 111-LED cable. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0026] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0028] A head-up display (HUD) is a technology that projects important information directly into the driver's line of sight, allowing them to access crucial information without looking down at the instrument panel or central control screen. With the development of new energy vehicles, these vehicles are equipped with numerous electronic control systems. These systems must be able to operate stably in complex electromagnetic environments to avoid malfunctions or misoperations caused by external electromagnetic interference, thereby ensuring the safety of drivers and passengers. Currently, HUD screens on the market typically use thin-film transistors (TFTs) without any external electromagnetic shielding. Therefore, HUD screens are highly susceptible to external electromagnetic interference. Poor electromagnetic protection performance can significantly affect display quality, data transmission, and system stability, leading to noise, stripes, or other abnormal patterns on the screen, thus threatening driving safety.

[0029] To address the aforementioned technical problems, this application provides an electromagnetic shielding structure and a vehicle-mounted HUD device.

[0030] Reference Figure 1 , Figure 2 As shown, this application embodiment provides an electromagnetic shielding structure, including a first conductive shielding cover 100 and a second conductive shielding cover 101. The first conductive shielding cover 100 is attached to the light-emitting side of the HUD screen 102, and a cutout portion 103 is formed on the first conductive shielding cover 100. The HUD screen 102 has a light-emitting area 104, and the coverage area of ​​the cutout portion 103 coincides with the light-emitting area 104. The second conductive shielding cover 101 covers the backlight side of the HUD screen 102 and is in contact with the first conductive shielding cover 100.

[0031] This also includes an LED cable 111; one end of the LED cable 111 is in contact with the conductive foam layer 105, and the other end is used to connect to the grounding cable of the motherboard.

[0032] It should be noted that the first conductive shielding cover 100 is designed to be installed on the light-emitting side of the HUD screen 102, that is, the side facing the driver. It has a cutout portion 103, designed to ensure that the information displayed on the screen can be transmitted to the driver without obstruction. At the same time, the position and area of ​​the cutout portion 103 are precisely matched with the light-emitting area 104 of the HUD screen 102 to ensure optimal visual effect.

[0033] In this embodiment, the second conductive shielding cover 101 covers the backlight side of the HUD screen 102 and remains in contact with the first conductive shielding cover 100. Through the adhesion of the first conductive shielding cover 100 and the second conductive shielding cover 101, a complete shielding layer can be formed outside the HUD screen 102, effectively preventing external electromagnetic interference from affecting the normal operation of the HUD system.

[0034] It should be noted that the first conductive shielding layer is electrically connected to the HUD screen 102, and the second conductive shielding layer is also electrically connected to the HUD screen 102. Both the first and second conductive shielding layers can be made of metal, depending on the requirements.

[0035] It should be noted that the reason why the first and second conductive shielding layers can form effective electromagnetic shielding after being conductively connected to the HUD screen 102 is because this embodiment creates a complete conductive path, allowing electromagnetic interference to be effectively guided to the ground rather than intruding into the HUD screen 102. This not only protects the HUD screen 102 from external electromagnetic interference but also ensures the clarity and stability of the displayed information, thereby improving driving safety. In this way, even in complex electromagnetic environments, the HUD system can operate stably and provide accurate information display.

[0036] By providing a first conductive shielding cover 100 with a perforated portion 103 on the light-emitting surface, the display area can be kept unobstructed while the non-display area receives effective electromagnetic protection. Since the edges of the display screen are typically non-light-emitting, conductive materials can be placed there without affecting the visual effect. These conductive materials guide external electromagnetic interference to the ground wire, preventing it from affecting the core area of ​​the screen.

[0037] The technical effects that the embodiments of this application can produce are as follows:

[0038] The embodiments of this application improve electromagnetic protection performance. By employing a double-layer conductive shielding cover design, the electromagnetic protection capability of the HUD screen 102 is significantly enhanced. This not only reduces the impact of external electromagnetic interference on display quality, such as reducing the possibility of abnormal patterns like noise and stripes, but also improves the stability of data transmission.

[0039] The embodiments of this application can ensure driving safety. Since the HUD system is directly related to the efficiency and accuracy of the driver obtaining key driving information, strengthening its electromagnetic protection performance can directly improve vehicle driving safety. Avoiding information misreading or system malfunctions caused by electromagnetic interference helps maintain a good driving experience and safety assurance.

[0040] The embodiments of this application can optimize the user experience. Through effective electromagnetic shielding measures, the HUD system can be ensured to work stably even in complex electromagnetic environments, providing clear and accurate information display, thereby optimizing the user's driving experience.

[0041] Reference Figure 1 , Figure 2 As shown, in one optional implementation, the first conductive shielding cover 100 includes a conductive foam layer 105. The conductive foam layer 105 is provided with an adhesive backing on the side near the HUD screen 102. The conductive foam layer 105 is connected to the second conductive shielding cover 101 and the HUD screen 102 through the adhesive backing.

[0042] It should be noted that conductive foam is a material that combines elasticity and conductivity. It is typically made of a foam substrate, such as polyurethane foam, combined with a metal coating or conductive fibers. Conductive foam not only provides good electromagnetic shielding performance but also has a certain degree of cushioning and shock absorption.

[0043] It should be noted that the conductive foam layer 105 in this embodiment has an adhesive backing on the side near the HUD screen 102, which allows it to be firmly bonded to the HUD screen 102. At the same time, the conductive foam layer 105 also contacts the second conductive shielding cover 101 through the adhesive backing, ensuring a good electrical connection between the two shielding covers and between the shielding cover and the screen.

[0044] It should be noted that the entire structure includes the conductive foam layer 105, the HUD screen 102, and the second conductive shielding cover 101, forming a complete electromagnetic protection system. The conductive foam layer 105 acts as a bridge here, ensuring tight connection and conductivity between the components.

[0045] The beneficial effects that the embodiments of this application can produce are as follows:

[0046] The use of conductive foam layer 105 in this embodiment significantly enhances the electromagnetic shielding effect. Due to its excellent conductivity, it can effectively guide external electromagnetic interference to the ground, reducing its impact on the internal circuitry of the HUD system. Furthermore, the elasticity of the conductive foam layer 105 helps fill the tiny gaps at the connection surfaces, further improving the overall shielding integrity.

[0047] The embodiments of this application improve mechanical stability. The application of adhesive backing makes the connection between components more robust and reliable, reducing contact problems caused by vibration or other mechanical stresses. This is especially important for vehicle-mounted equipment, as vehicles inevitably encounter various vibrations and impacts during operation.

[0048] This embodiment of the application has buffering and protective functions. The conductive foam layer 105 itself has buffering properties that can absorb external physical impacts to a certain extent, protecting the HUD screen 102 from damage. This is of positive significance for extending the service life of the device and maintaining display quality.

[0049] The embodiments of this application simplify the assembly process, achieving a quick and reliable connection through adhesive backing, thus streamlining the assembly workflow and improving production efficiency. It also facilitates maintenance and replacement, reducing subsequent repair costs.

[0050] In summary, the design employing conductive foam layer 105 and connecting it with adhesive backing not only improves the electromagnetic shielding effect but also enhances the system's mechanical stability and physical protection capabilities. This design is highly beneficial for in-vehicle HUD devices, providing more reliable and stable display performance in complex and changing driving environments, thereby better ensuring the accuracy and safety of drivers obtaining critical driving information.

[0051] Reference Figure 1 , Figure 2 As shown, as an optional implementation, the HUD screen 102 has a non-light-emitting area 106 surrounding the light-emitting area 104 in a circumferential direction; the adhesive backing is continuously disposed along the non-light-emitting area 106, and the conductive foam layer 105 is bonded to the non-light-emitting area 106 by the adhesive backing.

[0052] It should be noted that the adhesive backing is continuously arranged along the non-light-emitting area 106, ensuring that the conductive foam layer 105 can be firmly and evenly attached to the entire non-light-emitting area 106. This method not only provides a solid mechanical connection but also ensures the continuity of the electrical connection.

[0053] It should be noted that the conductive foam layer 105 is tightly bonded to the non-light-emitting area 106 with adhesive backing, forming a complete electromagnetic shielding structure. This not only protects the light-emitting area 104 from external electromagnetic interference, but also enhances the physical stability and durability of the entire device to a certain extent.

[0054] In this embodiment, because the adhesive backing is continuously disposed along the non-light-emitting area 106, the conductive foam layer 105 can form a continuous and uninterrupted shielding layer, effectively blocking external electromagnetic waves from entering the core area of ​​the HUD system. Furthermore, this embodiment reduces electromagnetic leakage by precisely fitting the non-light-emitting area 106, avoiding electromagnetic leakage points caused by splicing or gaps, and improving the overall shielding effect.

[0055] In addition, the continuous arrangement of the conductive foam layer 105 in this embodiment can eliminate the assembly gap and has a light-shielding function, thus solving the problem of light leakage of the HUD screen 102 due to the installation gap caused by the module installation tolerance.

[0056] Reference Figure 3 , Figure 4 As shown, as an optional implementation, it also includes a screen support frame 107; the side of the second conductive shielding cover 101 facing away from the HUD screen 102 is attached to the screen support frame 107; the backlight side of the HUD screen 102 is attached to the second conductive shielding cover 101.

[0057] The second conductive shielding cover 101 has a recessed platform; the HUD screen 102 is embedded in the recessed platform, and the light-emitting side surface of the HUD screen 102 is flush with the opening surface of the recessed platform.

[0058] In this embodiment, a multi-layer shielding system is formed by attaching the second conductive shielding cover 101 to the screen support frame 107. This design effectively expands the shielding range, protecting not only the HUD screen 102 itself but also providing more comprehensive electromagnetic protection for the entire device.

[0059] It should be noted that the screen bracket frame 107 provides a sturdy support for the HUD screen 102, preventing the screen from shifting or being damaged due to vibrations and impacts during vehicle operation. The fit between the second conductive shielding cover 101 and the bracket frame further enhances this fixing effect.

[0060] In this embodiment, the combination of the screen support frame 107 and the second conductive shielding cover 101 can not only absorb some vibrations, but also effectively disperse impact forces, protect the HUD screen 102 from physical damage, and extend the service life of the device.

[0061] Reference Figure 3 , Figure 4 As shown, as an optional implementation, the second conductive shielding cover 101 has a plurality of circumferentially spaced positioning holes 108; the screen support frame 107 is provided with a plurality of positioning structures 109, and the plurality of positioning structures 109 respectively pass through the plurality of positioning holes 108.

[0062] Among them, at least two positioning structures 109 are provided with card slots 110; the HUD screen 102 is provided with a card receiving part that is connected to the card slots 110.

[0063] This embodiment of the application, through the design of positioning holes 108 and positioning structures 109, enables high-precision alignment and fixation between the HUD screen 102, the second conductive shielding cover 101, and the screen support frame 107. This not only improves assembly accuracy but also reduces performance problems caused by assembly errors.

[0064] In addition, the cooperation between the positioning hole 108 and the positioning structure 109 effectively prevents the components from being misaligned or shifted during use, ensuring the integrity and effectiveness of the electromagnetic shielding layer.

[0065] It should be noted that the design of the card slot 110 and the card connector provides additional mechanical fixing points, enhancing the mechanical stability of the entire device. Especially during vehicle operation, due to the effects of vibration and impact, multi-point fixing can significantly reduce the risk of the screen loosening or falling off.

[0066] The cooperation between the slot 110 and the snap-fit ​​part makes the connection between the components more uniform, avoids local stress concentration, and extends the service life of the equipment.

[0067] It should be noted that the tight fit between the card slot 110 and the snap-fit ​​part ensures a seamless connection between the components, reduces potential electromagnetic leakage points, and improves the overall electromagnetic shielding effect. The card slot 110 and the snap-fit ​​part not only provide mechanical fixation but also guarantee a good electrical connection, protecting the normal operation of the HUD system.

[0068] As an optional implementation, the first conductive shielding cover 100 is a black structural component.

[0069] For example, the conductive foam layer 105 is a black structural component. The black structural component solves the problem of the shielding structure's influence on the reflection of light emitted from the HUD screen 102, thus meeting the light-masking requirement.

[0070] On the other hand, this embodiment provides an in-vehicle HUD device, including the above-mentioned electromagnetic shielding structure, HUD screen 102 and motherboard; the motherboard is electrically connected to the HUD screen 102.

[0071] The vehicle-mounted HUD device provided in this application embodiment significantly enhances the electromagnetic protection capability of the HUD screen 102 by employing a double-layer conductive shielding cover design. This not only reduces the impact of external electromagnetic interference on display quality, such as reducing the possibility of abnormal patterns like noise and stripes, but also improves the stability of data transmission.

[0072] The embodiments of this application can ensure driving safety. Since the HUD system is directly related to the efficiency and accuracy of the driver obtaining key driving information, strengthening its electromagnetic protection performance can directly improve vehicle driving safety. Avoiding information misreading or system malfunctions caused by electromagnetic interference helps maintain a good driving experience and safety assurance.

[0073] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An electromagnetic shielding structure, characterized by, The electromagnetic shielding structure comprises a first conductive shielding cover (100) and a second conductive shielding cover (101), the first conductive shielding cover (100) is attached to the light-emitting side of a HUD screen (102), and a hollow part (103) is formed on the first conductive shielding cover (100); the HUD screen (102) has a light-emitting area (104), and the covering area of the hollow part (103) coincides with the light-emitting area (104); the second conductive shielding cover (101) covers the back light side of the HUD screen (102) and is in contact with the first conductive shielding cover (100).

2. The electromagnetic shielding structure of claim 1, wherein, The first conductive shielding cover (100) comprises a conductive foam layer (105), the side close to the HUD screen (102) of the conductive foam layer (105) is provided with an adhesive, and the conductive foam layer (105) connects the second conductive shielding cover (101) and the HUD screen (102) through the adhesive.

3. The electromagnetic shielding structure of claim 2, wherein, The HUD screen (102) has a non-light-emitting area (106) circumferentially surrounding the light-emitting area (104); the adhesive is continuously arranged along the non-light-emitting area (106), and the conductive foam layer (105) is attached to the non-light-emitting area (106) through the adhesive.

4. The electromagnetic shielding structure according to any one of claims 1 to 3, characterized in that A screen support frame (107) is further included; the side away from the HUD screen (102) of the second conductive shielding cover (101) is attached to the screen support frame (107); and the back light side of the HUD screen (102) is attached to the second conductive shielding cover (101).

5. The electromagnetic shielding structure of claim 4, wherein, A plurality of positioning holes (108) are formed on the second conductive shielding cover (101) and are arranged at intervals in the circumferential direction; and a plurality of positioning structures (109) are arranged on the screen support frame (107), and the plurality of positioning structures (109) respectively correspond to the plurality of positioning holes (108).

6. The electromagnetic shield structure of claim 5, wherein, A clamping groove (110) is arranged on at least two of the positioning structures (109); and a clamping part corresponding to the clamping groove (110) is arranged on the HUD screen (102).

7. The electromagnetic shielding structure according to claim 2 or 3, characterized in that, An LED cable (111) is further included; one end of the LED cable (111) is in contact with the conductive foam layer (105), and the other end is used for connecting a grounding cable of a mainboard.

8. The electromagnetic shielding structure according to any one of claims 1 to 3 and 5 to 6, characterized in that, The first conductive shielding cover (100) is a black structural member.

9. The electromagnetic shielding structure according to any one of claims 1-3 and 5-6, characterized in that, The second conductive shielding cover (101) has a sunken platform; the HUD screen (102) is embedded in the sunken platform, and the light-emitting side surface of the HUD screen (102) is flush with the opening surface of the sunken platform.

10. A vehicle-mounted HUD device, characterized by comprising: The electromagnetic shielding structure, the HUD screen (102) and the mainboard of any one of claims 1-9 are included; and the mainboard is electrically connected to the HUD screen (102).

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