Modularized combined type vehicle-mounted head-up display system

Abstract

The invention relates to a modular combined type vehicle-mounted head-up display system, which comprises a main machine body module, which is used as a structural carrier of the system and is provided with a first mechanical interface, a second mechanical interface and an electrical interface; the projection unit module is integrated with an image source used for generating a display image, and the projection unit module is detachably connected with the main machine body module through the first mechanical interface and electrically connected with the main machine body module through the electrical interface; the optical expansion module comprises an expansion optical element used for changing the light path of the display image, and the optical expansion module is detachably connected with the main machine body module through the second mechanical interface and located on the light path output side of the projection unit module. The method has the beneficial effects that the development and manufacturing cost can be greatly reduced, the production and supply chain efficiency is improved, convenient maintenance and upgrading are realized, and high flexibility and expandability are realized.

Description

Technical Field

[0001] This invention relates to the field of automotive electronics technology, and more specifically to a modular, combined in-vehicle head-up display system. Background Technology

[0002] With the development of automotive intelligence, the information carried by in-vehicle head-up displays (HUDs) is increasing daily, from basic vehicle speed and navigation to advanced driver assistance information and even entertainment projection. To meet the configuration and functional requirements of different vehicle models, HUDs have evolved into various specifications. The existing HUD structures mainly suffer from the following problems: First, non-standardized design and high development costs: HUDs of different specifications and FOVs usually require independent structural, optical and electronic design from scratch, resulting in long R&D cycles, high costs and poor component interchangeability; Secondly, the integrated structure makes maintenance and upgrades difficult: Traditional HUDs are assembled and installed as a whole unit. Once a core component (such as PGU or optical lens) is damaged or a hardware upgrade is required, the entire HUD assembly often needs to be replaced, resulting in extremely high maintenance costs. Third, it lacks flexibility and is difficult to adapt to multiple vehicle models: OEMs develop different HUDs for different vehicle configurations, and the production line needs to prepare different tooling and assembly processes for each HUD, resulting in complex supply chain management and a lack of economies of scale. Summary of the Invention

[0003] The purpose of this invention is to provide a modular, modular vehicle head-up display system that can significantly reduce development and manufacturing costs, improve production and supply chain efficiency, enable convenient maintenance and upgrades, and achieve high flexibility and scalability.

[0004] A modular, combined vehicle head-up display system includes: The main body module, which serves as the structural carrier of the system, is provided with a first mechanical interface, a second mechanical interface, and an electrical interface. The projection unit module integrates an image source for generating and displaying images. The projection unit module is detachably connected to the main body module through the first mechanical interface and electrically connected to the main body module through the electrical interface. An optical expansion module includes an extended optical element for changing the optical path of the displayed image. The optical expansion module is detachably connected to the main body module via the second mechanical interface and is located on the optical path output side of the projection unit module.

[0005] In the above solution, by decoupling the system into standardized modules with independent functions, such as the main body module, projection unit module, and optical expansion module, OEMs do not need to redesign the entire HUD assembly for different models or configurations. They only need to develop or select different optical expansion modules based on a unified main body module to adapt to different windshield curvatures and installation spaces, achieving cross-model reuse of the core platform and significantly saving R&D costs and mold investment. Standardized modules support parallel production and independent procurement, simplifying supply chain management. Production lines only need to assemble universal modules, eliminating the need for dedicated tooling for each HUD, improving production efficiency and achieving economies of scale. Furthermore, modules are quickly positioned and locked through first and second mechanical interfaces, and plug-and-play functionality is achieved through electrical interfaces, eliminating the need for complex on-site optical calibration and greatly simplifying the assembly process for OEMs. When the image source or core optical components are damaged or the technology is upgraded, only the corresponding projection unit module or optical expansion module needs to be replaced, without replacing the entire HUD assembly, completely changing the expensive repair mode of traditional integrated HUDs. By replacing optical expansion modules with different optical surface types, the same main body module and projection unit module can be quickly adapted to the dashboard layout and windshield parameters of different models, from sedans and SUVs to sports cars, solving the industry problem of high customization and difficulty in platform application of traditional HUDs. Consumers or OEMs can flexibly select modules with different performance levels according to their budget and needs. In the future, users can upgrade ordinary W-HUD to AR-HUD by upgrading the optical expansion module, or upgrade the basic TFT image source to a higher brightness DLP or LCoS image source by replacing the projection unit module, thereby realizing on-demand customization and progressive upgrades of functions.

[0006] Furthermore, the main body module includes a main housing, in which a main control circuit board is installed. The electrical interface is an onboard connector on the main control circuit board, which is used to mate with a corresponding complementary connector on the projection unit module to establish a power and data connection.

[0007] In the above solution, the electrical interface is designed as an onboard connector on the main control circuit board, which ensures the physical directness and mechanical stability of the power and data connection between the projection unit module and the system main control. It can effectively resist the continuous vibration and impact during vehicle operation, and greatly reduce the risk of signal interruption or poor contact caused by loose connection. The onboard connector is a multi-pin composite electrical connector. The complementary connector on the projection unit module and the onboard connector achieve precise modular plugging and unplugging. This modular design not only facilitates the installation and disassembly of the projection unit module and simplifies the assembly process, but also enables quick and convenient replacement when the projection unit module fails or needs technical upgrade.

[0008] Furthermore, the first mechanical interface is located on the main housing, and the outer periphery of the first mechanical interface is provided with a plurality of first connection positions. The projection unit module includes a housing, and the housing is provided with a plurality of first connection holes corresponding to the first connection positions. The projection unit module and the main body module are detachably connected by passing fasteners through the first connection holes and threading them with the first connection positions.

[0009] In the above solution, by setting multiple first connection positions on the outer periphery of the first mechanical interface, and correspondingly setting multiple first connection holes on the outer shell of the projection unit module, and using fasteners such as screws to thread through the first connection holes and connect to the first connection positions, the projection unit module and the main body module can be fixed at multiple points. This multi-point screw connection method greatly enhances the stability of the connection. During vehicle operation, even under various external forces such as bumps, vibrations, acceleration, and deceleration, the projection unit module can be firmly installed on the main body module, and it is not easy to loosen or shift, ensuring the stability of the overall structure of the vehicle head-up display system, thereby ensuring that the system can work continuously and stably. The threaded connection method using fasteners is relatively simple to operate. During assembly on the production line, workers can quickly complete the connection between the projection unit module and the main body module, improving production efficiency. During vehicle maintenance, repair, or module upgrades, the projection unit module can also be easily disassembled for inspection, repair, or replacement, reducing maintenance time and costs. Furthermore, the second mechanical interface is located on the main housing, and the outer periphery of the second mechanical interface is provided with a plurality of second connection positions. The optical expansion module includes a connecting shell, and the connecting shell is provided with a plurality of second connection holes corresponding to the second connection positions. The optical expansion module and the main body module are detachably connected by passing fasteners through the second connection holes and threading them with the second connection positions.

[0010] In the above scheme, multiple second connection positions are set on the outer periphery of the second mechanical interface, and multiple second connection holes are correspondingly set on the connection shell of the optical expansion module. Threaded connection is achieved through fasteners such as screws, forming a multi-point connection structure. This design makes the connection between the optical expansion module and the main body module more robust, effectively resisting various vibrations, impacts, and bumps generated during vehicle operation. Since the optical expansion module is used to change the optical path of the displayed image, the stability of the connection can ensure the positional and angular accuracy of the expanded optical elements, reducing the small displacement of the optical elements caused by factors such as vibration, thereby ensuring the quality and effect of the displayed image. During vehicle use, if it is necessary to inspect, repair, or replace the optical expansion module, it can be easily disassembled and reinstalled, reducing the difficulty and time cost of maintenance.

[0011] Furthermore, the connecting shell is provided with an incident light opening and an exit light opening. The light path enters the incident light opening through the second mechanical interface. The extended optical element is installed inside the connecting shell and located between the incident light opening and the exit light opening.

[0012] In the above scheme, the light path can accurately enter the incident light opening through the second mechanical interface. This ensures that the display image light output from the projection unit module can accurately enter the optical expansion module. At the same time, the expansion optical element is installed between the incident light opening and the exit light opening, which enables the light to propagate along the designed path, effectively avoiding light scattering and leakage, and maximizing the efficiency of light transmission. This results in the image finally projected onto the windshield having sufficient brightness and clarity.

[0013] Furthermore, the outer periphery of the first mechanical interface is provided with several positioning pins, and the outer shell is provided with positioning holes corresponding to the positions of the positioning pins; the outer periphery of the second mechanical interface is provided with several slots, and the connecting shell is provided with a locking block that cooperates with the slots.

[0014] In the above scheme, several positioning pins are set on the outer periphery of the first mechanical interface, and positioning holes are provided at corresponding positions on the outer shell of the projection unit module. When the projection unit module is installed with the main body module, the positioning pins and positioning holes can fit tightly together, providing precise positioning guidance for the installation of the projection unit module. This ensures that the projection unit module is accurately connected to the main body module during the installation process, so that the image source in the projection unit module can be precisely aligned with the optical path of the entire system. This ensures that the displayed image can be accurately transmitted and displayed according to the design path, avoiding problems such as image offset and blurring caused by installation position deviation, thereby improving the display quality of the vehicle head-up display system. Several slots are set on the outer periphery of the second mechanical interface, and the connecting shell is provided with corresponding locking blocks. When installing the optical expansion module, the cooperation between the locking blocks and the slots plays a role in precise positioning. By accurately locking the locking blocks into the slots, the position and angle of the optical expansion module relative to the main body module can be quickly determined, ensuring that the expanded optical elements can be precisely in the optical path, realizing accurate changes to the optical path of the displayed image, and ensuring that the final image projected onto the windshield meets the design requirements.

[0015] Furthermore, the extended optical element can be a plane mirror, a freeform mirror, or an additional lens group containing a specific focal length.

[0016] In the above solutions, the extended optical elements are planar reflectors, which can be combined to form a basic W-HUD. This can reduce product prices and expand market coverage while meeting basic driving information display requirements. The extended optical elements are also freeform mirrors, which can be combined to form an AR-HUD with a larger field of view and a greater virtual image distance. This provides richer and more immersive augmented reality display functions, enhancing the system's technological appeal and attractiveness. Additional lens groups with specific focal lengths can adjust parameters such as focal length and curvature of the lenses according to specific optical design requirements to achieve functions such as focusing, diverging, or correcting light, thereby meeting various special optical performance indicators and providing more design possibilities for HUD systems of different specifications.

[0017] Furthermore, the image source is a TFT display screen, and the projection unit module also includes a collimating lens group, which is connected to the TFT display screen and disposed on the light output path of the TFT display screen.

[0018] In the above scheme, the main function of the collimating lens group is to convert the divergent light emitted by the TFT display screen into approximately parallel light. In the vehicle head-up display system, the collimated light can be propagated more effectively onto the windshield and reflected into the driver's eyes according to the expected light path. This ensures that the image will not be significantly distorted or deformed during the projection process, so that the virtual image can be accurately presented within the driver's field of vision and better integrated with the actual road scene.

[0019] Furthermore, the main body module also includes a primary reflector and a driving unit. The primary reflector is disposed inside the main housing and located on the optical path output side of the projection unit module. The driving unit is electrically connected to the main control circuit board and is configured to drive the primary reflector to adjust its angle according to a control signal.

[0020] In the above scheme, the primary reflector and drive unit can be installed into the main housing of the main body module first, and then the main housing is assembled with other modules. When assembling with other modules, only the connection and cooperation between the main housing and other modules need to be considered, which reduces the number of parts and assembly steps in the final assembly process. This reduces the complexity of the final assembly and reduces the assembly errors and confusion that may occur due to too many parts, thereby improving assembly efficiency. The drive unit is electrically connected to the main control circuit board and can automatically generate control signals based on information from various vehicle sensors to realize intelligent angle adjustment of the primary reflector.

[0021] Furthermore, the main body module is configured such that when the projection unit module is connected through the electrical interface, it can automatically identify the hardware parameters of the projection unit module and load the corresponding image source driver.

[0022] In the above solution, when the projection unit module is connected to the main body module through the electrical interface, the main body module can automatically identify its hardware parameters and load the corresponding image source driver. There is no need for users to manually perform complicated settings and debugging, which greatly simplifies the installation and use of the device. Users only need to connect the projection unit module to the main body module, and the system can quickly and automatically configure itself and start working normally immediately. For ordinary users, no professional technical knowledge is required to easily complete the connection and startup of the device, which significantly improves the user experience.

[0023] The modular, combined vehicle head-up display system of this invention offers significant advantages, including reduced development and manufacturing costs, improved production and supply chain efficiency, convenient maintenance and upgrades, and high flexibility and scalability. By decoupling the system into standardized, functionally independent modules such as the main body module, projection unit module, and optical expansion module, OEMs do not need to redesign the entire HUD assembly for different vehicle models or configurations. Instead, they can develop or select different optical expansion modules based on a unified main body module to adapt to different windshield curvatures and installation spaces, achieving cross-vehicle reuse of the core platform and greatly saving R&D costs and mold investment. Standardized modules support parallel production and independent procurement, simplifying supply chain management. Production lines only need to assemble general modules, eliminating the need for special tooling for each type of HUD, thus improving production efficiency and achieving economies of scale. Moreover, modules can be quickly positioned and locked through the first and second mechanical interfaces, and can be plugged and played through electrical interfaces, eliminating the need for complex on-site optical calibration and greatly simplifying the assembly process for vehicle manufacturers. When the image source or core optical components are damaged or the technology is updated, only the corresponding projection unit module or optical expansion module needs to be replaced, without replacing the entire HUD assembly, completely changing the expensive maintenance mode of traditional integrated HUDs. By replacing optical expansion modules with different optical surface types, the same main body module and projection unit module can be quickly adapted to the dashboard layout and windshield parameters of different car models, from sedans and SUVs to sports cars, solving the industry problem of high customization and difficulty in platform application of traditional HUDs. Consumers or OEMs can flexibly select modules with different performance levels according to their budget and needs. In the future, users can upgrade ordinary W-HUD to AR-HUD by upgrading the optical expansion module, or upgrade the basic TFT image source to a higher brightness DLP or LCoS image source by replacing the projection unit module, thereby realizing on-demand customization and progressive upgrades of functions. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a modular, combined vehicle head-up display system according to one embodiment.

[0025] Figure 2 This is a schematic diagram of the main body module structure of one embodiment.

[0026] Figure 3 This is an exploded view of a modular, combined vehicle head-up display system according to one embodiment.

[0027] Figure 4 An exploded view from another perspective of a modular, modular vehicle head-up display system according to one embodiment. Figure 5 This is a schematic diagram showing the connection between the projection unit module and the main body module in one embodiment.

[0028] Figure 6 This is a schematic diagram showing the connection between the optical expansion module and the main body module in one embodiment.

[0029] Reference numerals: 1. Main body module; 11. First mechanical interface; 12. Second mechanical interface; 13. Main housing; 14. First connection position; 15. Second connection position; 16. Positioning pin; 17. Slot; 18. Primary reflector; 19. Drive unit 2. Projection unit module; 21. Housing; 22. First connection hole; 23. Positioning hole; 24. Image source; 25. Collimating lens group; 3. Optical expansion module; 31. Expansion optical element; 32. Connecting shell; 33. Second connecting hole; 34. Incident light opening; 35. Outgoing light opening; 36. Locking block; 4. Main control circuit board. Detailed Implementation

[0030] The modular and combined vehicle head-up display system of the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0031] like Figures 1 to 3 As shown in a preferred embodiment, a modular combined vehicle head-up display system of the present invention includes: a main body module 1, which serves as the structural carrier of the system, and the main body module 1 is provided with a first mechanical interface 11, a second mechanical interface 12 and an electrical interface; a projection unit module 2, which integrates an image source 24 for generating display images, the projection unit module 2 being detachably connected to the main body module 1 through the first mechanical interface 11 and electrically connected to the main body module 1 through the electrical interface; and an optical expansion module 3, which includes an expansion optical element 31 for changing the optical path of the display image, the optical expansion module 3 being detachably connected to the main body module 1 through the second mechanical interface 12 and located on the optical path output side of the projection unit module 2.

[0032] In the above embodiments, by decoupling the system into standardized modules with independent functions such as the main body module 1, the projection unit module 2, and the optical expansion module 3, the OEM does not need to redesign the entire HUD assembly for different models or configurations. Based on the unified main body module 1, different optical expansion modules 3 can be developed or selected to adapt to different windshield curvatures and installation spaces, realizing cross-model reuse of the core platform and greatly saving R&D costs and mold investment.

[0033] Standardized modules support parallel production and independent procurement, simplifying supply chain management. Production lines only need to assemble general modules, eliminating the need for dedicated tooling for each type of HUD, thus improving production efficiency and achieving economies of scale. Furthermore, modules can be quickly positioned and locked together via the first mechanical interface 11 and the second mechanical interface 12, and can be plugged and played via electrical interfaces, eliminating the need for complex on-site optical calibration and greatly simplifying the assembly process for vehicle manufacturers.

[0034] When the image source 24 or core optical components are damaged or the technology is updated, only the corresponding projection unit module 2 or optical expansion module 3 needs to be replaced, without replacing the entire HUD assembly, which completely changes the expensive maintenance mode of traditional integrated HUDs. By replacing the optical expansion module 3 with different optical surface types, the same main body module 1 and projection unit module 2 can be quickly adapted to the dashboard layout and windshield parameters of different models from sedans and SUVs to sports cars, solving the industry problem of high customization and difficulty in platform application of traditional HUDs.

[0035] Consumers or OEMs can flexibly select modules with different performance levels according to their budget and needs. In the future, users can upgrade the ordinary W-HUD to AR-HUD by upgrading the optical expansion module 3, or upgrade the basic TFT image source 24 to a higher brightness DLP or LCoS image source 24 by replacing the projection unit module 2. This enables on-demand customization and progressive upgrades of functions. The ordinary W-HUD, or windshield head-up display system, projects important driving information, such as vehicle speed, navigation instructions, and engine speed, onto the car's windshield through optical projection, allowing the driver to obtain relevant information without looking down at the instrument panel. AR-HUD, or augmented reality head-up display system, is a more advanced display technology developed based on W-HUD. It can not only display basic driving information, but also integrate virtual information with real road scenes to achieve augmented reality effects; DPL image source 24 is a digital light processing image source 24, a projection display technology based on digital micromirror devices (DMDs). A DMD consists of a large number of tiny, tiltable mirrors, each representing a pixel; LCoS image source 24 is a silicon-based liquid crystal image source 24, a projection display technology that combines liquid crystal display technology and semiconductor silicon-based technology. It uses monocrystalline silicon as a substrate, on which a liquid crystal layer is fabricated to control the transmission and reflection of light.

[0036] like Figure 2 and Figure 3 As shown, in some embodiments, the main body module 1 includes a main housing 13, within which a main control circuit board 4 is installed. The electrical interface is an onboard connector mounted on the main control circuit board 4. This onboard connector mates with the corresponding complementary connector on the projection unit module 2 to establish power and data connections. Designing the electrical interface as an onboard connector on the main control circuit board 4 ensures the physical directness and mechanical stability of the power and data connection between the projection unit module 2 and the system main control, effectively resisting continuous vibration and impact during vehicle operation. This significantly reduces the risk of signal interruption or poor contact due to loose connections. The onboard connector is a multi-pin composite electrical connector. The complementary connector on the projection unit module 2 and the onboard connector achieve precise modular plugging and unplugging. This modular design not only facilitates the installation and disassembly of the projection unit module 2 and simplifies the assembly process, but also allows for quick and convenient replacement when the projection unit module 2 malfunctions or requires technical upgrades.

[0037] In the above embodiments, the main housing 13 is precision-manufactured from high-strength, lightweight engineering plastics or metal alloys, possessing excellent mechanical properties and structural stability. The main body module 1 is reliably connected to vehicle systems such as the vehicle power supply and CAN bus through some standardized connection interfaces. Through the connection with the vehicle power supply, the main body module 1 can obtain a stable power supply and rationally distribute electrical energy to various electronic components through the internal power management circuit to ensure the normal operation of the system. The connection with the CAN bus enables the main body module 1 to obtain various operating status information of the vehicle in real time, such as vehicle speed, engine speed, and steering signals, and to accurately control and adjust the HUD system based on this information to achieve collaborative work with the vehicle.

[0038] like Figure 2 , Figure 3 and Figure 5 As shown, in some embodiments, the first mechanical interface 11 is provided on the main housing 13, and the outer periphery of the first mechanical interface 11 is provided with a plurality of first connection positions 14. The projection unit module 2 includes a housing 21, and the housing 21 is provided with a plurality of first connection holes 22 corresponding to the first connection positions 14. The projection unit module 2 and the main body module 1 are detachably connected by passing fasteners through the first connection holes 22 and threading them with the first connection positions 14. By setting multiple first connection positions 14 on the outer periphery of the first mechanical interface 11, and correspondingly setting multiple first connection holes 22 on the housing 21 of the projection unit module 2, and using screws or other fasteners to thread through the first connection holes 22 and connect to the first connection positions 14, the projection unit module 2 and the main body module 1 can be fixed at multiple points. This multi-point screw connection method greatly enhances the stability of the connection. During vehicle operation, even under various external forces such as bumps, vibrations, acceleration, and deceleration, the projection unit module 2 can be firmly installed on the main body module 1, and it is not easy to loosen or shift, ensuring the stability of the overall structure of the vehicle head-up display system, thereby ensuring that the system can work continuously and stably. The operation of using fasteners for threaded connection is relatively simple. During assembly on the production line, workers can quickly complete the connection between the projection unit module 2 and the main body module 1, improving production efficiency. During vehicle maintenance, repair, or module upgrades, the projection unit module 2 can also be easily disassembled for inspection, repair, or replacement, reducing maintenance time and costs. like Figure 2 , Figure 3 and Figure 6As shown, in some embodiments, the second mechanical interface 12 is provided on the main housing 13, and the outer periphery of the second mechanical interface 12 is provided with a plurality of second connection positions 15. The optical expansion module 3 includes a connection shell 32, and the connection shell 32 is provided with a plurality of second connection holes 33 corresponding to the second connection positions 15. The optical expansion module 3 and the main body module 1 are detachably connected by passing fasteners through the second connection holes 33 and threading them with the second connection positions 15. Multiple second connection positions 15 are provided on the outer periphery of the second mechanical interface 12, and multiple second connection holes 33 are correspondingly provided on the connection shell 32 of the optical expansion module 3. Threaded connection is achieved through fasteners such as screws, forming a multi-point connection structure. This design makes the connection between the optical expansion module 3 and the main body module 1 more robust, effectively resisting various vibrations, impacts, and bumps generated during vehicle operation. Since the optical expansion module 3 is used to change the optical path of the displayed image, the stability of the connection can ensure the positional and angular accuracy of the extended optical element 31, reducing the small displacement of the optical element caused by factors such as vibration, thereby ensuring the quality and effect of the displayed image. During vehicle use, if it is necessary to inspect, repair, or replace the optical expansion module 3, it can be easily disassembled and reinstalled, reducing the difficulty and time cost of maintenance.

[0039] like Figure 3 and Figure 4 As shown, in some embodiments, the connecting housing 32 is provided with an incident light opening 34 and an exit light opening 35. The light path enters the incident light opening 34 through the second mechanical interface 12. The extended optical element 31 is installed inside the connecting housing 32 and located between the incident light opening 34 and the exit light opening 35. The light path can accurately enter the incident light opening 34 through the second mechanical interface 12, which ensures that the display image light output from the projection unit module 2 can accurately enter the optical extension module 3. At the same time, the extended optical element 31 is installed between the incident light opening 34 and the exit light opening 35, which enables the light to propagate along the designed path, effectively avoiding light scattering and leakage, and maximizing the efficiency of light transmission, so that the image finally projected onto the windshield has sufficient brightness and clarity.

[0040] like Figure 3 and Figure 4As shown, in some embodiments, the outer periphery of the first mechanical interface 11 is further provided with several positioning pins 16, and the outer shell 21 is provided with positioning holes 23 corresponding to the positions of the positioning pins 16; the outer periphery of the second mechanical interface 12 is provided with several slots 17, and the connecting shell 32 is provided with a locking block 36 that cooperates with the slots 17. With several positioning pins 16 on the outer periphery of the first mechanical interface 11 and positioning holes 23 corresponding to the positions of the outer shell 21 of the projection unit module 2, when the projection unit module 2 is installed with the main body module 1, the positioning pins 16 and positioning holes 23 can fit tightly together, providing precise positioning guidance for the installation of the projection unit module 2. This ensures that the projection unit module 2 accurately docks with the main body module 1 during installation, allowing the image source 24 in the projection unit module 2 to be precisely aligned with the optical path of the entire system, ensuring that the displayed image can be accurately transmitted and displayed according to the designed path, and avoiding image distortion caused by installation position deviations. Issues such as offset and blurring are addressed, thereby improving the display quality of the vehicle head-up display system. The second mechanical interface 12 has several slots 17 on its outer periphery, and the connecting shell 32 has a corresponding locking block 36. When installing the optical expansion module 3, the locking block 36 and the slot 17 work together to achieve precise positioning. By accurately locking the locking block 36 into the slot 17, the position and angle of the optical expansion module 3 relative to the main body module 1 can be quickly determined, ensuring that the expansion optical element 31 can be accurately placed in the optical path, realizing accurate changes to the optical path of the displayed image, and ensuring that the final image projected onto the windshield meets the design requirements.

[0041] like Figure 3 As shown, in some embodiments, the extended optical element 31 can be a plane mirror, a freeform mirror, or an additional lens group containing a specific focal length. If the extended optical element 31 is a plane mirror, it can be combined to form a basic W-HUD, which can reduce product price and expand market coverage while meeting basic driving information display requirements. If the extended optical element 31 is a freeform mirror, it can be combined to form an AR-HUD with a larger field of view and a greater virtual image distance, providing richer and more immersive augmented reality display functions, enhancing the system's technological appeal and attractiveness. An additional lens group containing a specific focal length can, according to specific optical design requirements, adjust parameters such as the focal length and curvature of the lenses to achieve functions such as focusing, diverging, or correcting light, thereby meeting various special optical performance indicators and providing more design possibilities for HUD systems of different specifications.

[0042] like Figure 3As shown, in some embodiments, the image source 24 is a TFT display screen, and the projection unit module 2 also includes a collimating lens group 25, which is connected to the TFT display screen and positioned on the light output path of the TFT display screen. The main function of the collimating lens group 25 is to convert the diverging light emitted from the TFT display screen into approximately parallel light. In an in-vehicle head-up display system, the collimated light can more effectively propagate onto the windshield and be reflected into the driver's eyes according to the expected light path. This ensures that the image will not exhibit significant distortion or falsification during projection, allowing the virtual image to be accurately presented within the driver's field of vision and better integrated with the actual road scene. The collimating lens group 25 and the TFT display screen are standard components, and their internal structure and working principle will not be described in detail here.

[0043] like Figure 3 and Figure 4 As shown, in some embodiments, the main body module 1 further includes a primary reflector 18 and a drive unit 19. The primary reflector 18 is disposed within the main housing 13 and located on the optical path output side of the projection unit module 2. The drive unit 19 is electrically connected to the main control circuit board 4 and is configured to drive the primary reflector 18 to adjust its angle according to a control signal. The primary reflector 18 and the drive unit 19 can be installed into the main housing 13 of the main body module 1 first, and then the main housing 13 can be assembled with other modules. When assembling with other modules, only the connection and cooperation between the main housing 13 and other modules need to be considered, which reduces the number of parts and assembly steps in the final assembly process. This reduces the complexity of the final assembly, reduces assembly errors and confusion that may occur due to too many parts, and thus improves assembly efficiency.

[0044] The drive unit 19 is electrically connected to the main control circuit board 4 and can automatically generate control signals based on information from various vehicle sensors to achieve intelligent angle adjustment of the primary reflector 18. For example, by combining information from the vehicle's attitude sensor and driver's seat position sensor, the system can automatically determine the driver's line of sight requirements and the vehicle's driving status, and adjust the angle of the primary reflector 18 in real time without manual intervention from the driver. This intelligent linkage and automated control improves the ease of use and intelligence level of the HUD system. The primary reflector 18, drive unit 19, and their control are already mature technologies, and their structure and working principle will not be described in detail here.

[0045] like Figure 1As shown, in some embodiments, when the main body module 1 is configured to connect to the projection unit module 2 via an electrical interface, it can automatically identify the hardware parameters of the projection unit module 2 and load the corresponding image source 24 driver. When the projection unit module 2 is connected to the main body module 1 via an electrical interface, the main body module 1 can automatically identify its hardware parameters and load the corresponding image source 24 driver, eliminating the need for complex manual settings and debugging by the user. This greatly simplifies the installation and use of the device. The user only needs to connect the projection unit module 2 to the main body module 1, and the system can quickly and automatically configure itself and start working normally immediately. For ordinary users, no professional technical knowledge is required to easily connect and start the device, significantly improving the user experience.

[0046] The present invention discloses the working principle and process of a modular combined vehicle head-up display system. When the system is started, the main body module 1 provides a stable power supply and necessary control signals to the projection unit module 2 through the electrical interface. These control signals contain various operating status information of the vehicle, such as vehicle speed, engine speed, navigation instructions, etc. This information is transmitted from the vehicle's CAN bus through the main body module 1. The image source 24 in the projection unit module 2 converts the corresponding information into a specific display image according to the received control signal. At the same time, the first mechanical interface 11 ensures the detachable connection between the projection unit module 2 and the main body module 1, which not only facilitates the installation, disassembly and maintenance of the module, but also ensures the stability of the connection and prevents loosening due to vibration during vehicle operation. The display image generated by the projection unit module 2 is emitted in the form of light and enters the optical expansion module 3. The extended optical element 31 in the optical extension module 3 changes the optical path of the displayed image, usually by magnifying the image, adjusting the angle, and correcting distortion, so that the image can be projected into the driver's field of vision with a suitable size, clear image quality, and accurate position. The second mechanical interface 12 realizes the detachable connection between the optical extension module 3 and the main body module 1, which makes it easy to replace the optical extension module 3 with different parameters according to different vehicle models or user needs to achieve the best display effect.

[0047] In the description of this invention, it should be understood that terms such as "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0049] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] Although the description of the invention has been given in conjunction with the specific embodiments described above, it will be apparent to those skilled in the art that many substitutions, modifications, and variations can be made based on the foregoing. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A modular, combined vehicle-mounted head-up display system, characterized in that, include: The main body module, which serves as the structural carrier of the system, is provided with a first mechanical interface, a second mechanical interface, and an electrical interface. The projection unit module integrates an image source for generating and displaying images. The projection unit module is detachably connected to the main body module through the first mechanical interface and electrically connected to the main body module through the electrical interface. An optical expansion module includes an extended optical element for changing the optical path of the displayed image. The optical expansion module is detachably connected to the main body module via the second mechanical interface and is located on the optical path output side of the projection unit module.

2. The modular combined vehicle head-up display system according to claim 1, characterized in that, The main body module includes a main housing, in which a main control circuit board is installed. The electrical interface is an onboard connector on the main control circuit board, which is used to mate with a corresponding complementary connector on the projection unit module to establish a power and data connection.

3. The modular combined vehicle head-up display system according to claim 2, characterized in that, The first mechanical interface is located on the main housing. The outer periphery of the first mechanical interface is provided with a plurality of first connection positions. The projection unit module includes a housing. The housing is provided with a plurality of first connection holes corresponding to the first connection positions. The projection unit module and the main body module are detachably connected by passing fasteners through the first connection holes and threading them with the first connection positions.

4. The modular combined vehicle head-up display system according to claim 3, characterized in that, The second mechanical interface is located on the main housing. The outer periphery of the second mechanical interface is provided with a plurality of second connection positions. The optical expansion module includes a connecting shell. The connecting shell is provided with a plurality of second connection holes corresponding to the second connection positions. The optical expansion module and the main body module are detachably connected by passing fasteners through the second connection holes and threading them with the second connection positions.

5. The modular combined vehicle head-up display system according to claim 4, characterized in that, The connecting shell is provided with an incident light opening and an exit light opening. The light path enters the incident light opening through the second mechanical interface. The extended optical element is installed inside the connecting shell and located between the incident light opening and the exit light opening.

6. The modular combined vehicle head-up display system according to claim 4, characterized in that, The outer periphery of the first mechanical interface is provided with several positioning pins, and the outer shell is provided with positioning holes corresponding to the positions of the positioning pins; the outer periphery of the second mechanical interface is provided with several slots, and the connecting shell is provided with a locking block that cooperates with the slots.

7. The modular combined vehicle head-up display system according to claim 1, characterized in that, The extended optical element can be a plane mirror, a freeform mirror, or an additional lens group containing a specific focal length.

8. The modular combined vehicle head-up display system according to claim 1, characterized in that, The image source is a TFT display screen, and the projection unit module further includes a collimating lens group, which is connected to the TFT display screen and disposed on the light output path of the TFT display screen.

9. The modular combined vehicle head-up display system according to claim 2, characterized in that, The main body module also includes a primary reflector and a driving unit. The primary reflector is located inside the main housing and on the optical path output side of the projection unit module. The driving unit is electrically connected to the main control circuit board and is configured to drive the primary reflector to adjust its angle according to a control signal.

10. The modular combined vehicle head-up display system according to claim 1, characterized in that, When the main body module is configured to connect the projection unit module through the electrical interface, it can automatically identify the hardware parameters of the projection unit module and load the corresponding image source driver.

Images