Vehicle-mounted display module and head-up display system

Abstract

The embodiment of the application provides a kind of vehicle-mounted display module and heads-up display system.It includes image source, reflection component and projection surface, image source includes first emission area for emitting AR-HUD light source and second emission area for emitting P-HUD light source;Reflection component includes first reflection component, second reflection component and transparent component, first reflection component is oppositely arranged in first emission area with first inclination angle, transparent component is arranged above first reflection component along the light source emission direction of first emission area, and is inclinedly arranged with third inclination angle, second reflection component is oppositely arranged in second emission area with second inclination angle, and is arranged between first reflection component and transparent component along the light source emission direction of second emission area.The module is used to achieve the effect of reducing occupied space.

Description

Technical Field

[0001] This application relates to the field of vehicle display technology, and more particularly to a vehicle display module and a head-up display system. Background Technology

[0002] HUD head-up displays mainly include AR-HUD (Augmented Reality Head-Up Display), which uses multiple curved / flat mirrors to form a virtual image; and P-HUD (Panel Head-Up Display), which projects the display image directly onto the windshield area to form a real image.

[0003] Currently, while taking into account cost control and technical feasibility, in order to fully leverage the advantages of AR-HUD in displaying dynamic information such as augmented reality navigation and environmental perception, and the characteristics of P-HUD in displaying basic driving information (such as vehicle speed and RPM) with simple structure, fast response and high stability, AR-HUD / W-HUD is usually combined with P-HUD, that is, they are projected as two separate systems.

[0004] However, existing AR-HUD and P-HUD, when used in combination, have the problem of occupying a large area. Utility Model Content

[0005] This application provides an in-vehicle display module and a head-up display system to solve the problem that existing AR-HUD and P-HUD occupy a large area when used in combination.

[0006] In a first aspect, embodiments of this application provide an in-vehicle display module, which includes an image source, a reflective component, and a projection surface. The image source includes a first emitting region for emitting an AR-HUD light source and a second emitting region for emitting a P-HUD light source.

[0007] The reflective assembly includes a first reflector, a second reflector, and a transmissive element. The first reflector is disposed opposite to the first emission area at a first tilt angle. The transmissive element is disposed above the first reflector along the light source emission direction of the first emission area and is tilted at a third tilt angle. The second reflector is disposed opposite to the second emission area at a second tilt angle and is disposed alternately between the first reflector and the transmissive element along the light source emission direction of the second emission area.

[0008] The first reflector is used to reflect the first image light emitted from the first emission area to the arc-shaped reflector, and the arc-shaped reflector reflects the first image light to the first projection area on the projection surface at the first incident angle.

[0009] The second reflector is used to reflect the second image light emitted from the second emission area to the transmission element, and the transmission element amplifies and corrects the second image light before it enters the second projection area on the projection surface at the second incident angle.

[0010] In one possible implementation, the arc-shaped reflector is positioned closer to the projection surface than the first and second reflectors.

[0011] In one possible implementation, the second projection area is provided with a light-shielding layer, which is located below the first projection area along the direction in which the first image light is reflected from the arc-shaped reflector to the first projection area. The light-shielding layer is used to block external light transmitted from outside the second projection area to the arc-shaped reflector.

[0012] In one possible implementation, the first emission area and the second emission area are arranged adjacent to each other, and a light-blocking plate is provided between the first emission area and the second emission area.

[0013] In one possible implementation, an image source backlight element for adjusting brightness is provided below the first emission area and below the second emission area, along the emission direction of the first image light emitted by the image source and the emission direction of the second image light.

[0014] In one possible implementation, along the direction in which external light enters from the projection surface, the reflective surface on the second reflector is located within the shadow area of ​​the external light entering the transmissive element.

[0015] In one possible implementation, the first reflector, the second reflector, and the transmissive element are all rotatably connected within the housing of the vehicle display module.

[0016] In one possible implementation, when the brightness of the first image light is greater than the first preset brightness, both the first reflector and the arc-shaped reflector rotate in the first direction;

[0017] When the brightness of the first image light is less than the second preset brightness, both the first reflector and the arc-shaped reflector rotate in the second direction; when the first preset brightness is greater than the second preset brightness, the first direction and the second direction are opposite.

[0018] The angle of rotation of the first reflector satisfies:

[0019] ;

[0020] in, The range of rotation angle variation of the first reflector, representing the change in brightness of the first image light. =1.5°~1.8°; Characterizing the first preset brightness or the second preset brightness, Characterizes the brightness of the light in the first image;

[0021] The angle of rotation of the arc-shaped reflector satisfies:

[0022] ;

[0023] in, The range of rotation angle variation of the arc-shaped reflector, representing the change in brightness of the first image light. =1.4°~1.8°.

[0024] In one possible implementation, when Less than -1.5°, will Adjust to -1.5°, when When the angle is greater than 1.5°, Adjust to 1.5°.

[0025] Secondly, embodiments of this application provide a head-up display system, including the vehicle-mounted display module of the first aspect.

[0026] The vehicle-mounted display module and head-up display system provided in this application integrate image sources onto a single image source, corresponding to the first and second emission areas respectively. The spatial multiplexing and isolation of the optical path are achieved through layered first reflective elements, transmissive elements, and second reflective elements, avoiding the additional space required for each system to operate independently. Furthermore, the transmissive elements are positioned at a specific third tilt angle, which not only splits the light but also amplifies and corrects the P-HUD optical path, thereby compensating for wedge angle differences caused by different projection paths, reducing image distortion and ghosting problems, and lowering the cost and complexity increased by separate calibration. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0028] Figure 1 This is a schematic diagram of the structure of the vehicle display module provided in the embodiments of this application;

[0029] Figure 2 This is a schematic diagram of the modules of the head-up display system provided in the embodiments of this application;

[0030] Figure 3 This is a schematic diagram of the optical path of the head-up display system provided in the embodiments of this application;

[0031] Figure 4 This is a schematic diagram of the imaging MTF curve provided in an embodiment of this application.

[0032] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0033] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0034] First, let me explain the terms used in this application:

[0035] AR-HUD can refer to an augmented reality head-up display that can overlay virtual information (such as navigation arrows, lane line recognition, obstacle prompts, etc.) onto the driver's real field of vision in a three-dimensional space.

[0036] P-HUD refers to a combined head-up display that typically uses a separate transparent display panel or small reflector to project basic driving information, such as vehicle speed, engine speed, and fuel status. Compared to AR-HUD, P-HUD has a simpler structure and lower cost, making it suitable for the aftermarket and mid-to-low-end vehicle models.

[0037] AR-HUD light sources can refer to light-emitting components used to generate augmented reality images, which can be high-brightness microdisplays (such as LCOS, DMD, or Micro OLED) or laser scanning modules.

[0038] P-HUD light source refers to the light-emitting module used to generate basic driving information images, which is usually composed of an LCD screen and an LED backlight module.

[0039] The wedge angle in P-HUD and AR-HUD refers to the tiny angle between two adjacent surfaces of an optical element (such as a windshield or dedicated display panel), used to prevent "ghosting" caused by multiple reflections of light at the interface. In the embodiments of this application, P-HUD and AR-HUD have different requirements for the wedge angle due to their different optical path designs. If both share an optical system or projection surface, mismatched wedge angles can lead to image distortion, ghosting, and other problems. Therefore, optical compensation or structural optimization is required in the integrated design to ensure image quality.

[0040] In existing technologies, the combined application of AR-HUD and P-HUD presents the following technical problems:

[0041] The installation process is complex: Currently, combining AR-HUD and P-HUD typically requires using two separate systems. The P-HUD image is projected onto the black silkscreened area below the windshield, while the AR-HUD image is projected onto the transparent area of ​​the windshield. This not only increases system complexity but also makes the installation process cumbersome, requiring more time and manpower. Furthermore, the installation and debugging of two separate systems are more prone to errors, affecting the final display effect.

[0042] Large size: Current technology requires separate installation of AR-HUD and P-HUD modules, resulting in a large overall system size that occupies more interior space in the vehicle. This is especially true in small vehicles, where space constraints are more pronounced, making it difficult to accommodate two independent HUD systems simultaneously. This not only affects the vehicle's aesthetics but may also negatively impact the comfort of the driver and passengers.

[0043] The wedge angle matching problem between P-HUD and AR-HUD: In existing technologies, AR-HUD and P-HUD have different optical path designs, resulting in a wedge angle mismatch. This mismatch causes image distortion and ghosting, affecting the driver's accurate reading of information. To reduce this effect, complex optical adjustments and calibrations are typically required, further increasing the system's complexity and cost.

[0044] Based on this, the vehicle display module provided in this application integrates image sources onto a single image source, corresponding to the first and second emission areas respectively. It achieves spatial multiplexing and isolation of the optical path through layered first reflective elements, transmissive elements, and second reflective elements, avoiding the additional space required for each independent system. Furthermore, the transmissive elements are positioned at a specific third tilt angle, which not only splits the light but also amplifies and corrects the P-HUD optical path, thereby compensating for wedge angle differences caused by different projection paths, reducing image distortion and ghosting problems, and lowering the cost and complexity increased by separate calibration.

[0045] Figure 1 This is a schematic diagram of the structure of the vehicle display module provided in the embodiments of this application, such as... Figure 1 As shown, the vehicle display module includes an image source 100, a reflective component 200, and a projection surface 300.

[0046] Image source 100 can refer to a component that generates and emits light required to display an image, such as a display screen or a micro-projection module, which may include a first emitting area 111 for emitting an AR-HUD light source and a second emitting area 112 for emitting a P-HUD light source;

[0047] The first emission area 111 and the second emission area 112 are two different emission areas on the image source 100. The first emission area 111 and the second emission area 112 can be set in terms of up and down position or in other ways as needed, and can also display the same or different display content as needed.

[0048] Optionally, the reflective component 200 is a component for reflecting AR-HUD light sources and P-HUD light sources. The reflective component 200 includes a first reflector 210, a second reflector 220, and a transmissive component 230.

[0049] The first reflector 210 is used to reflect the first image light emitted from the first emission area 111 to the arc-shaped reflector 240, and the arc-shaped reflector 240 reflects the first image light to the first projection area 310 on the projection surface 300 at the first incident angle.

[0050] The second reflector 220 is used to reflect the second image light emitted from the second emission area 112 to the transmission element 230, and after the transmission element 230 performs amplification and correction processing on the second image light, it is incident on the second projection area 320 on the projection surface 300 at the second incident angle.

[0051] The first reflector 210 can be a reflective element specifically designed for AR-HUD optical paths, positioned at a specific first tilt angle in front of the first emission area 111 (i.e., the AR image generation area) in the image source 100. Its main function is to reflect the image light emitted from this area in a preset direction and guide it to subsequent optical components (such as curved reflectors), thereby achieving accurate positioning and projection of augmented reality information. By precisely controlling the tilt angle, it ensures that the image is presented clearly and without distortion at the designated position in the driver's field of vision.

[0052] The second reflector 220 serves the P-HUD optical path and is positioned at a second tilt angle in front of the second emission area 112 (i.e., the P-HUD image generation area) in the image source 100. It is used to directionally reflect image light from this area and is staggered between the first reflector 210 and the transmissive element 230 to avoid conflict with the AR-HUD optical path. This facilitates the coexistence of two display functions within the same module, improving system integration and reducing space occupancy.

[0053] The transmissive element 230 is located above the first reflective element 210 and is tilted at a specific third tilt angle. This allows it to amplify and correct the image light from the P-HUD, compensating for image distortion or wedge angle mismatch caused by different projection paths. While achieving optical path multiplexing, it also improves the clarity and consistency of the P-HUD image.

[0054] The curved reflector 240 can refer to a reflector with a specific curvature, used in HUD optical systems to perform secondary reflection and optical correction of image light. Its curved surface can adjust the direction of light propagation and optimize image clarity and field of view, so that virtual information can be accurately projected onto the first projection area 310.

[0055] The first projection area 310 and the second projection area 320 can refer to two independent display areas formed on the windshield or dedicated projection surface 300 after the image light from the AR-HUD light source and the P-HUD light source are reflected through different optical paths, respectively.

[0056] Optionally, the first reflector 210 is disposed opposite to the first emission region 111 at a first tilt angle, the transmissive element 230 is disposed above the first reflector 210 along the light source emission direction of the first emission region 111 and is tilted at a third tilt angle, and the second reflector 220 is disposed opposite to the second emission region 112 at a second tilt angle and is disposed alternately between the first reflector 210 and the transmissive element 230 along the light source emission direction of the second emission region 112.

[0057] A staggered arrangement refers to the spatially interleaved arrangement of multiple optical elements to avoid interference or overlap of their optical paths while ensuring their respective functions are realized. In this embodiment, the staggered arrangement means that the second reflector 220 is positioned at a specific location between the first reflector 210 and the transmissive element 230, so that it neither obstructs the optical path of the AR-HUD (processed by the first reflector 210) nor fails to effectively guide the image light of the P-HUD to the transmissive element 230 for further processing. Thus, by placing the second reflector 220 between the first reflector 210 and the transmissive element 230 but not on the same straight line, it is ensured that the image light of the P-HUD can be smoothly transmitted from the second emission area 112 to the transmissive element 230 without intersecting or obstructing the optical path of the AR-HUD. This not only solves the problem of multiple optical paths coexisting but also minimizes the overall size of the optical system and improves space utilization. Furthermore, by adjusting the angle and position, the optical path of each HUD can operate independently, ensuring that its image quality and information transmission are not affected.

[0058] Optionally, the arc-shaped reflector 240 is positioned closer to the projection surface 300 than the first reflector 210 and the second reflector 220.

[0059] The fact that the curved reflector 240 is positioned closer to the projection surface 300 than the first reflector 210 and the second reflector 220 indicates that it is located at the rear of the optical path, closer to the final imaging position. This arrangement allows the AR-HUD image light from the first reflector 210 to be reflected twice by the curved reflector 240 and projected onto the windshield or dedicated projection surface 300 in a manner more in line with the human eye's viewing angle, resulting in a more natural and clearer image presentation. Simultaneously, due to the specific curvature of the curved reflector 240, it can also focus and correct distortion of the image, further improving display quality. Placing the curved reflector 240 closer to the projection surface 300 also helps optimize the overall optical path design, reduce interference between optical components, and improve integration and stability.

[0060] Optionally, the second projection area 320 is provided with a light-shielding layer 321, which is located below the first projection area 310 along the direction in which the first image light is reflected from the arc-shaped reflector 240 to the first projection area 310. The light-shielding layer 321 is used to block external light transmitted from outside the second projection area 320 to the arc-shaped reflector 240.

[0061] The light-shielding layer 321 can be a coating or film area on the second projection area 320, or it can be a structural component embedded in the glass. The light-shielding layer 321 not only serves as the display surface for the P-HUD image, presenting basic driving information such as vehicle speed and RPM, but also functions as a "light-blocking platform" for the AR-HUD, blocking strong external light (such as sunlight) from entering the optical path of the AR-HUD, preventing "sunlight backflow" and thus avoiding stray light interference with AR image quality or causing ghosting. Therefore, while improving the image clarity of the P-HUD, it also enhances the stability and display quality of the AR-HUD in complex lighting environments.

[0062] Optionally, the first emission area 111 and the second emission area 112 are arranged adjacent to each other, and a light-blocking plate 113 is provided between the first emission area 111 and the second emission area 112.

[0063] The first emission area 111 (for AR-HUD) and the second emission area 112 (for P-HUD) are arranged adjacent to each other on the image source 100, with a light-blocking plate 113 placed between them to achieve optical isolation between the two display functions. Since the two emission areas share the same image source 100, the adjacent layout helps to reduce the overall module size and improve integration; while the light-blocking plate 113 in the middle effectively prevents light crosstalk between the two, preventing the P-HUD light source from interfering with the AR-HUD image quality and ensuring the clarity and contrast of their respective output images.

[0064] Optionally, along the emission direction of the first image light emitted by the image source 100 and the emission direction of the second image light, an image source backlight 120 for adjusting the brightness is provided below the first emission area 111 and below the second emission area 112.

[0065] Image source backlights 120 are respectively disposed below the first emission area 111 and the second emission area 112 along the direction in which the first image light (AR-HUD) and the second image light (P-HUD) are emitted from the image source 100. These backlights are used to independently adjust the illumination of their respective areas. This allows the brightness of the AR-HUD and P-HUD light sources to be optimized individually according to actual display needs, improving image contrast and clarity. Simultaneously, it avoids display interference caused by uneven lighting or crosstalk between the two areas, enhancing the stability and environmental adaptability of the optical system, thereby ensuring that the driver can obtain a high-quality, easily identifiable display effect under different lighting conditions.

[0066] Optionally, along the direction in which external light enters from the projection surface 300, the reflective surface on the second reflector 220 is located within the shadow area of ​​the external light entering the transmissive element 230.

[0067] Along the direction in which external light enters from the projection surface 300, the reflective surface of the second reflector 220 is positioned within the area of ​​the shadow cast by the transmissive element 230, thereby preventing external light (such as sunlight) from directly illuminating the reflective surface of the second reflector 220. This effectively reduces stray light reflection and optical interference caused by external light, preventing problems such as glare, ghosting, or decreased contrast in the P-HUD image. By placing the key optical surface of the second reflector 220 in the shielded area, the system's stability and imaging clarity in strong light environments are improved, ensuring accurate display and reading of driving information.

[0068] Optionally, the first reflector 210, the second reflector 220, and the transmissive element 230 can all be rotatably connected within the housing of the vehicle display module.

[0069] The first reflector 210, the second reflector 220, and the transmissive element 230 are rotatably connected. This can be achieved by setting a rotating shaft or adjustment mechanism on the housing of the vehicle display module. For example, a hinge structure, a rotating shaft with a limiting slot, or a micro motor drive device can be used to allow it to rotate flexibly and lock within a certain angle range. Simultaneously, an angle sensor or automatic adjustment system can be integrated inside the module to intelligently fine-tune the angle of the optical elements according to the external environment or preset parameters, further improving imaging quality and system stability.

[0070] The first reflector 210, the second reflector 220, and the transmissive element 230 are rotatably connected within the housing of the vehicle display module, allowing each optical element to be adjusted in posture according to the actual installation angle or user requirements. This improves adaptability and flexibility, effectively addressing differences in windshield tilt angles and image projection positions across different vehicle models. It also facilitates optical path calibration during production assembly and performance optimization during later maintenance, ensuring that AR-HUD and P-HUD images are always clearly and stably presented in the driver's field of vision. This application also provides a head-up display system, including the vehicle display module of this application embodiment.

[0071] Optionally, when the brightness of the first image light is greater than the first preset brightness, both the first reflector and the arc-shaped reflector rotate in the first direction;

[0072] When the brightness of the first image light is less than the second preset brightness, both the first reflector and the arc-shaped reflector rotate in the second direction; when the first preset brightness is greater than the second preset brightness, the first direction and the second direction are opposite.

[0073] The angle of rotation of the first reflector satisfies:

[0074] ;

[0075] in, The range of rotation angle variation of the first reflector, representing the change in brightness of the first image light. =1.5°~1.8°; Characterizing the first preset brightness or the second preset brightness, Characterizes the brightness of the light in the first image;

[0076] The angle of rotation of the arc-shaped reflector satisfies:

[0077] ;

[0078] in, The range of rotation angle variation of the arc-shaped reflector, representing the change in brightness of the first image light. =1.4°~1.8°.

[0079] Optionally, when Less than -1.5°, will Adjust to -1.5°, when When the angle is greater than 1.5°, Adjust to 1.5°.

[0080] The brightness of the first image light can refer to the brightness of the image light currently displayed on the windshield.

[0081] The AR-HUD image brightness and field of view (FOV) are adaptively controlled by dynamically adjusting the rotation angles of the first reflector and the arc-shaped reflector. When the brightness of the first image is higher than a first preset brightness (e.g., in a bright, sunny environment), both reflectors rotate in the first direction to compress the optical path and reduce the FOV, preventing image overexposure. When the brightness is lower than a second preset brightness (e.g., during nighttime driving), they rotate in the second direction to expand the FOV and increase the visible range. The rotation angle of the first reflector is determined by... Controlled to reflect the sensitivity of brightness changes to angle; the angle of the curved reflector is determined by... Control is used to achieve coordinated focus. To prevent over-adjustment, It is limited to ±1.5°.

[0082] For example, under midday sunlight, the brightness of the first image reaches 800 cd / m², which is higher than the first preset brightness. , =1.5°, calculated as follows Drive the two reflectors to rotate in the first direction (i.e. Figure 1 The upper ends of the first reflector and the curved reflector rotate towards the left side of the image, making the virtual image more concentrated and the contrast higher; while at night, the brightness decreases. lower than the second preset brightness , The reflector rotates in the second direction (i.e.) Figure 1 The upper ends of the first reflector and the arc-shaped reflector rotate towards the right side of the image to expand the display range and make it easier for the driver to obtain more navigation information.

[0083] This effectively improves the visibility and comfort of AR-HUD in all weather conditions. It avoids glare during high-brightness conditions and enhances readability during low-brightness conditions. Simultaneously, the dual-mirror collaborative adjustment optimizes optical path efficiency and reduces energy waste. An angle limiting mechanism ensures system stability, preventing mechanical overload or image jitter, making it suitable for complex vibration environments in vehicles and significantly improving driving safety and user experience.

[0084] The vehicle display module provided in this application embodiment can integrate AR-HUD and P-HUD together, and the shared backlight and image source eliminate the complexity of needing to install two independent systems separately, making the installation process simpler and faster, reducing installation time and labor costs. Furthermore, since there is only one system, the possibility of errors during installation and debugging is reduced, thereby improving the accuracy and consistency of the final display effect.

[0085] Furthermore, by reducing the number of components and simplifying the structure, the overall reliability of the system is improved, potential failure points are reduced, the system's service life is extended, maintenance requirements are reduced, and operating costs are further lowered.

[0086] Furthermore, by integrating AR-HUD and P-HUD together, the overall system size can be significantly reduced. This makes it more suitable for small vehicles with limited space, saving interior space, enhancing the vehicle's aesthetics, and avoiding the cramped feeling caused by too many devices.

[0087] Furthermore, P-HUD does not project onto the windshield but uses other display methods, thus eliminating the wedge angle problem. Since the optical paths of P-HUD and AR-HUD no longer overlap, there is no conflict between wedge angles. Therefore, image distortion and ghosting problems are effectively eliminated, ensuring that the driver can accurately read the information.

[0088] Figure 2 This is a schematic diagram of the modules of the head-up display system provided in the embodiments of this application, such as... Figure 2 As shown, the head-up display system includes: an AR-HUD module, a P-HUD module, an optical path module, a display control unit, and sensors. Among them,

[0089] The AR-HUD module is used to generate augmented reality information, such as navigation arrows, road signs, and warning messages.

[0090] The P-HUD module is used to generate basic driving information, such as speed, RPM, and fuel status.

[0091] The optical path module includes a semi-transparent mirror and multiple reflectors, which can combine the images from the AR-HUD and P-HUD into a single image and project it onto the corresponding display area. The semi-transparent mirror allows some light to pass through while reflecting other light, thus achieving image superposition.

[0092] The sensors include a vehicle speed sensor, an ambient light sensor, and a driver monitoring camera. The vehicle speed sensor provides real-time speed data, the ambient light sensor detects external light intensity and adjusts display brightness, and the driver monitoring camera detects the driver's line of sight to ensure critical information is always within the driver's field of vision.

[0093] In this embodiment, the system operates through a closed-loop logic of "data acquisition - collaborative computing - execution feedback": the vehicle speed sensor acquires real-time vehicle speed data from the vehicle's CAN bus and transmits it to the AR-HUD main control chip. The chip then dynamically adjusts the display ratio and information density of the AR navigation path according to the vehicle speed (e.g., simplifying redundant information at high speeds and increasing proximity prompts at low speeds) to ensure the path is synchronized with the vehicle's actual location. The ambient light sensor detects external light intensity (e.g., strong light, low light) in real time and converts it into a digital signal. The chip, combined with a preset brightness mapping table, outputs commands to adjust the brightness of the display panel and drives the first reflector and the arc-shaped... The reflector rotates (compressing the field of view (FOV) to prevent overexposure in strong light and expanding the FOV to improve visibility in low light) to achieve coordinated adaptation between brightness and light path; the driver monitoring camera captures key points on the driver's face through near-infrared imaging, calculates the gaze vector and maps it to the windshield display coordinate system. If the gaze is detected to deviate from the effective display area, the chip will first increase the brightness of key information to attract attention. If the gaze still does not return, a warning will be triggered. At the same time, the information display position will be dynamically adjusted (such as shifting the navigation arrow into the field of view) to ensure that the core content is always in the driver's field of vision. Finally, through the fusion of data from the three sensors, the AR-HUD can achieve contextualized and safe display.

[0094] The display control unit includes a central processing unit and an image processor, which can receive sensor data and adjust the display content according to preset algorithms. For example, when the driver needs navigation information, the display control unit will prioritize displaying the navigation arrows of the AR-HUD.

[0095] In this embodiment, the central processing unit can receive multi-source data from a vehicle speed sensor (to determine the driving scenario, such as high speed / low speed), an ambient light sensor (to determine the display brightness benchmark), and a driver monitoring camera (to capture the driver's gaze focus and operational intent, such as determining "needing navigation information" if the driver looks at the central control navigation interface for 3 consecutive seconds). This data is then combined with operational signals synchronized from the vehicle's CAN bus, such as turn signals and accelerator pedal signals (e.g., predicting the need for navigation at an upcoming intersection when the turn signal is activated). Next, the image processor, based on a preset "information priority matrix" (where navigation information has higher priority than entertainment information during driving, and emergency warning information has higher priority than regular navigation), filters out the core needs of the current scenario (e.g., when navigation is determined to be needed, key elements such as turn arrows and distance prompts are extracted from the navigation data). Finally, the display brightness is adapted to ambient light (increasing arrow contrast under strong light), and the arrow display size and position are adjusted based on vehicle speed (the arrow is enlarged and displayed 500 meters in advance at high speeds, and reduced and closer to the road surface at low speeds). Simultaneously, non-critical information is masked or weakened (e.g., pausing the display of music lyrics) to ensure that the AR-HUD only focuses on the content most needed by the driver, achieving precise "on-demand display" control.

[0096] The display control unit can receive data from various sensors (such as vehicle speed sensors, ambient light sensors, and driver monitoring cameras) and intelligently analyze the current driving situation and the driver's needs using preset algorithms. For example, when navigation guidance is detected, the unit prioritizes processing and displaying navigation arrow information generated by the AR-HUD module. Simultaneously, it automatically adjusts the HUD display brightness according to ambient light intensity to ensure clear visibility under any lighting conditions, and monitors the driver's gaze direction to ensure that the most critical information appears accurately within the driver's field of vision. This allows for the integration and optimized display of content generated by different HUD modules, improving driving safety and comfort. The entire process embodies a high level of automation and intelligence, making the driving experience smoother and more natural.

[0097] Windshield, the display surface used for image projection.

[0098] Figure 3 This is a schematic diagram of the optical path of the head-up display system provided in the embodiments of this application; as shown Figure 3 As shown in the optical path diagram, the AR-HUD and P-HUD share the same image source, outputting different optical paths through the first and second emission areas, respectively. The light is spatially multiplexed and optically isolated via a layered first reflector, a transmissive element, and a second reflector: the first reflector reflects the AR-HUD beam into the main optical path, while the P-HUD beam is split by the transmissive element and reflected by the second reflector to the windshield. The transmissive element is positioned at a specific third tilt angle, which not only separates the two light paths but also amplifies and corrects the P-HUD optical path, compensating for wedge angle deviations caused by differences in projection paths, effectively reducing image distortion and ghosting. This simplifies the optical layout, reduces calibration complexity and manufacturing costs, while simultaneously improving overall imaging quality and system integration.

[0099] Figure 4 This is a schematic diagram of the imaging MTF curve provided in the embodiments of this application, as shown below. Figure 4 As shown, this curve is used to evaluate the imaging quality of an optical system. The horizontal axis represents spatial frequency (unit: line pairs / mm), and the vertical axis represents the OTF modulus (range 0-1), reflecting the system's ability to transmit different levels of detail. Multiple curves in the figure correspond to the OTF performance at different field of view angles (e.g., -0.825°, -0.63°, etc.) and in two directions (tangential and sagittal). The overall trend shows that the OTF is close to 1 in the low-frequency region, indicating good contrast transmission capability; as the spatial frequency increases, the OTF gradually decreases, indicating some loss of high detail resolution. The curves show slight differences at different field of view angles, but overall remain at a high level, indicating that the optical system possesses good imaging uniformity and sharpness across the entire field of view.

[0100] Finally, it should be noted that other embodiments of this utility model will readily conceive of by those skilled in the art upon consideration of the specification and practice of the utility model disclosed herein. This utility model is intended to cover any variations, uses, or adaptations of this utility model that follow the general principles of this utility model and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.

Claims

1. A vehicle-mounted display module, characterized in that, The vehicle-mounted display module includes an image source, a reflective component, and a projection surface. The image source includes a first emission area for emitting an AR-HUD light source and a second emission area for emitting a P-HUD light source. The reflective assembly includes a first reflector, a second reflector, and a transmissive element. The first reflector is disposed opposite to the first emission area at a first tilt angle. The transmissive element is disposed above the first reflector along the light source emission direction of the first emission area and is tilted at a third tilt angle. The second reflector is disposed opposite to the second emission area at a second tilt angle and is disposed alternately between the first reflector and the transmissive element along the light source emission direction of the second emission area. Wherein, the first reflector is used to reflect the first image light emitted from the first emission area to the arc-shaped reflector, and the arc-shaped reflector reflects the first image light to the first projection area on the projection surface at a first incident angle; The second reflector is used to reflect the second image light emitted from the second emission area to the transmissive element, and the transmissive element amplifies and corrects the second image light before it enters the second projection area on the projection surface at the second incident angle.

2. The vehicle-mounted display module according to claim 1, characterized in that, The arc-shaped reflector is positioned closer to the projection surface than the first reflector and the second reflector.

3. The vehicle-mounted display module according to claim 2, characterized in that, The second projection area is provided with a light-shielding layer, and is located below the first projection area along the direction in which the first image light is reflected from the arc-shaped reflector to the first projection area. The light-shielding layer is used to block external light transmitted from outside the second projection area to the arc-shaped reflector.

4. The vehicle-mounted display module according to claim 1, characterized in that, The first emission area and the second emission area are arranged adjacent to each other, and a light-blocking plate is provided between the first emission area and the second emission area.

5. The vehicle-mounted display module according to claim 1, characterized in that, Along the emission directions of the first image light and the second image light emitted by the image source, an image source backlight element for adjusting brightness is provided below the first emission area and below the second emission area.

6. The vehicle-mounted display module according to claim 1, characterized in that, Along the direction in which external light enters from the projection surface, the reflective surface on the second reflector is located within the shadow area where the external light enters the transmissive element.

7. The vehicle-mounted display module according to any one of claims 1 to 6, characterized in that, The first reflector, the second reflector, and the transmissive element are all rotatably connected within the housing of the vehicle display module.

8. The vehicle-mounted display module according to claim 7, characterized in that, When the brightness of the first image light is greater than the first preset brightness, both the first reflector and the arc-shaped reflector rotate in the first direction; When the brightness of the first image light is less than the second preset brightness, both the first reflector and the arc-shaped reflector rotate in the second direction; when the first preset brightness is greater than the second preset brightness, the first direction and the second direction are opposite. Wherein, the angle of rotation of the first reflector satisfies: ； Among them, the The range of rotation angle variation of the first reflector as a function of the brightness of the first image light. =1.5°~1.8°; the aforementioned Characterizing the first preset brightness or the second preset brightness, the Characterizing the brightness of the light in the first image; The angle of rotation of the arc-shaped reflector satisfies: ； Among them, the The range of rotation angle variation of the arc-shaped reflector as a function of the brightness of the first image light. =1.4°~1.8°.

9. The vehicle-mounted display module according to claim 8, characterized in that, When the Less than -1.5°, the aforementioned Adjusted to -1.5°, when the... When the angle is greater than 1.5°, the aforementioned Adjust to 1.5°.

10. A head-up display system, characterized in that, The vehicle display module includes any one of claims 1 to 9.

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