Head-up display system, control method of head-up display system, and vehicle

Abstract

The application provides a head-up display system, a control method of the head-up display system and a vehicle. The head-up display system is applied to the vehicle and comprises a display module configured to project first virtual image information and second virtual image information on a windshield of the vehicle, and a control module electrically connected with the display module and configured to control display states of the first virtual image information and the second virtual image information. The projection areas of the first virtual image information and the second virtual image information on the windshield are different. The head-up display system can realize multi-information partition projection, so as to improve information readability and driving safety.

Description

Technical Field

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

[0002] Head-up display (HUD) systems are widely used in the automotive field. They project information such as vehicle speed, navigation, and warnings onto the windshield in the form of virtual images through a display module, allowing the driver to obtain driving information while maintaining a forward view, thereby improving driving safety.

[0003] Existing head-up display (HUD) systems typically project only a single virtual image, or while they can project multiple images, the projection areas of each image on the windshield largely overlap or are adjacent. For example, traditional HUD systems project navigation prompts and vehicle speed information into the same area in the center of the driver's field of vision. This approach has the following drawbacks: First, sharing the same projection area with different types of information (such as warning and entertainment information) can easily cause visual interference, making it difficult for the driver to quickly distinguish information priorities; second, when multiple images are projected simultaneously, the brightness of the overlapping areas is too high or the information is too dense, which increases the driver's cognitive burden; third, it is impossible to allocate independent display areas for information based on its importance or type, limiting the flexibility of human-computer interaction and the clarity of information presentation.

[0004] Therefore, how to achieve multi-information partition projection in head-up display systems to improve information readability and driving safety has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] This application provides a head-up display system, a control method for the head-up display system, and a vehicle, which can realize multi-information partition projection to improve information readability and driving safety.

[0006] This application provides a head-up display system applied to a vehicle, the head-up display system comprising: The display module is used to project first virtual image information and second virtual image information onto the windshield of the vehicle. The control module is electrically connected to the display module and is used to control the display state of the first virtual image information and the second virtual image information; The first virtual image information and the second virtual image information are projected onto different areas of the windshield.

[0007] In some embodiments, the display module includes a first display module and a second display module. The first display module is used to project the first virtual image information onto the windshield of the vehicle, and the second display module is used to project the second virtual image information onto the windshield of the vehicle. The control module is electrically connected to the first display module and the second display module respectively, and is used to control the working state of the first display module and the second display module.

[0008] In some embodiments, the head-up display system further includes a first reflective unit disposed on the light-emitting side of the first display module and the second display module. The first light emitted by the first display module and the second light emitted by the second display module are reflected by the first reflective unit and then projected onto different areas of the windshield.

[0009] In some embodiments, the head-up display system further includes a beam splitter disposed on the light-emitting side of the display module, the beam splitter being used to reflect a first light ray emitted by the display module and transmit a second light ray emitted by the display module.

[0010] In some embodiments, the head-up display system further includes an environmental perception module, which is electrically connected to the control module and is used to collect environmental data and vehicle status data; the control module dynamically adjusts the display content of the first virtual image information and the second virtual image information and the start / stop status of the display module according to the data collected by the environmental perception module.

[0011] In some embodiments, the control module is used to identify the current driving scenario based on the data collected by the environment perception module. The driving scenario includes a normal driving scenario, a complex road condition scenario, and a low-speed scenario. The control module is also used to switch to the corresponding collaborative display mode based on the current driving scenario.

[0012] In some embodiments, the control module is further configured to: switch to the corresponding collaborative display mode according to the current driving scenario. When the driving scenario is a normal driving scenario, the first virtual image information is controlled to be navigation prompt information, and the second virtual image information is controlled to be basic driving information displayed in full screen; When the driving scenario is a complex road condition scenario, the first virtual image information is controlled to expand the display field of view and superimpose warning information, while the second virtual image information is controlled to shrink the display area and reduce brightness; When the driving scenario is a low-speed scenario, the second virtual image information is controlled to display parking assistance information in full screen, and the first virtual image information is controlled to stop projection or only display distance prompt information.

[0013] In some embodiments, the first virtual image information is long-distance virtual imaging information, and the second virtual image information is short-distance virtual imaging information; the first virtual image information is projected onto the upper region of the windshield, and the second virtual image information is projected onto the lower region of the windshield.

[0014] This application embodiment also provides a control method for a head-up display system, applied to the above-mentioned head-up display system, the control method for the head-up display system including: Collect environmental data and vehicle status data; Identify the current driving scenario based on the collected data; Based on the identified driving scenario, adjust the display content of the first virtual image information and the second virtual image information, as well as the start / stop status of the display module.

[0015] This application also provides a vehicle that includes the above-described head-up display system.

[0016] The head-up display system, control method, and vehicle provided in this application embodiment are applied to a vehicle. The head-up display system includes a display module and a control module. The display module projects first and second virtual image information onto the vehicle's windshield. The control module is electrically connected to the display module and controls the display state of the first and second virtual image information. The first and second virtual image information are projected onto different areas of the windshield. By projecting different types of information to different areas—for example, projecting basic instrument information below the driver's field of vision and safety warning information directly in front of the driver's field of vision—spatial partitioning of information can be achieved. Therefore, this head-up display system can achieve multi-information partitioning projection, effectively improving information readability and driving safety. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a first structure of a head-up display system provided in an embodiment of this application.

[0019] Figure 2 This is a schematic diagram of a second structure of the head-up display system provided in an embodiment of this application.

[0020] Figure 3 This is a schematic diagram of a third structure of the head-up display system provided in the embodiments of this application.

[0021] Figure 4 This is a schematic diagram of a fourth structure of the head-up display system provided in the embodiments of this application.

[0022] Figure 5 This is a schematic diagram of the structure of a windshield provided in an embodiment of this application.

[0023] Figure 6 This is a fifth structural schematic diagram of the head-up display system provided in the embodiments of this application.

[0024] Figure 7 This is a flowchart illustrating the control method of the head-up display system provided in an embodiment of this application. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0026] This application provides a head-up display system, a control method for the head-up display system, and a vehicle, which can achieve multi-information zone projection to improve information readability and driving safety. The following is a detailed description with reference to the accompanying drawings.

[0027] Please see Figure 1 as well as Figure 2 , Figure 1 This is a schematic diagram of a first structure of the head-up display system provided in an embodiment of this application. Figure 2 This is a schematic diagram of a second structure of the head-up display system provided in an embodiment of this application.

[0028] This application provides a head-up display system 100, which is applied to a vehicle. The head-up display system 100 is a device that uses the principle of optical projection to present driving information as a virtual image in the driver's field of vision, with the aim of reducing the frequency of the driver looking down at the instrument panel and improving driving safety.

[0029] The head-up display system 100 includes a display module 110 and a control module 120. The display module 110 is an optical projection component used to generate image light, such as a light source, lens group, digital micromirror device, or liquid crystal display, which projects first virtual image information A and second virtual image information B onto the windshield 200 of the vehicle. The windshield 200 can be the front windshield of the vehicle. The first virtual image information A and the second virtual image information B represent different types of driving data, such as navigation instructions, lane departure warnings, or forward collision warnings, and the second virtual image information B can be basic instrument information such as vehicle speed and remaining range.

[0030] The control module 120 is electrically connected to the display module 110, specifically via a CAN bus or Ethernet. The control module 120 can be an MCU controller, and it is used to control the display status of the first virtual image information A and the second virtual image information B, including but not limited to the on / off state of the information, brightness adjustment, color change, and selection of display timing.

[0031] The first virtual image information A and the second virtual image information B are projected onto the windshield 200 in different areas. Specifically, the projection area refers to the spatial position range of the virtual image on the windshield 200 perceived by the driver's naked eye. By projecting different types of information onto different areas, such as projecting basic instrument information onto the area below the driver's field of vision and projecting safety warning information onto the area directly in front of the driver's field of vision, spatial partitioning of information can be achieved.

[0032] The advantages of this zoned projection are: First, it avoids visual clutter caused by overlapping display of multiple types of information in the same area, reducing the driver's cognitive load; second, the driver can quickly judge the importance of information based on its spatial location, for example, a virtual image in the central area usually represents urgent or critical information, thus shortening reaction time; third, the optical parameters (such as brightness and contrast) of different areas can be independently optimized to adapt to readability requirements under different ambient lighting conditions. Therefore, this head-up display system 100 can achieve multi-information zoned projection, effectively improving information readability and driving safety.

[0033] In some embodiments, the first virtual image information A is long-distance virtual imaging information to realize the head-up display (HUD) function, and the second virtual image information B is short-distance virtual imaging information to realize the panoramic head-up display (PHUD) function. The first virtual image information A is projected onto the upper area of ​​the windshield 200, and the second virtual image information B is projected onto the lower area of ​​the windshield 200.

[0034] Specifically, long-distance virtual imaging information typically corresponds to augmented reality information that needs to be integrated with the real road conditions ahead, such as navigation guidance, forward collision warning, and lane departure warning. Its imaging distance is relatively far (e.g., 7 to 15 meters in front of the vehicle), highly overlapping with the driver's normal forward line of sight. Projecting long-distance virtual imaging information onto the upper area of ​​the windshield 200 allows the driver to naturally read the information while looking at the distant road conditions, avoiding a significant downward shift of the gaze and thus shortening reaction time.

[0035] The close-range virtual imaging information includes basic driving data such as vehicle speed, engine speed, fuel level, and headlight status. The imaging distance is relatively short (e.g., 2 to 3 meters in front of the vehicle), and it is visually presented below the driver's field of vision. Projecting this close-range panoramic virtual imaging information onto the lower area of ​​the windshield 200 does not obstruct the view of the road ahead and allows the driver to quickly check it using their peripheral vision.

[0036] The aforementioned zoned projection method offers the following technical advantages: First, it separates near and far information, aligning with drivers' visual perception habits and reducing the risk of information confusion. Second, the long-distance imaging in the upper region blends more naturally with the real road scene, enhancing the presentation of augmented reality effects. Third, the close-up panoramic imaging in the lower region provides a wider field of view, accommodating more driving information and minimizing noticeable image jitter due to road bumps. Therefore, by matching information types with projection areas, this embodiment achieves layered and efficient information presentation within the limited windshield display area, further improving driving safety and user experience.

[0037] In some embodiments, the display module 110 includes a first display module 111 and a second display module 112. The first display module 111 projects a first virtual image information A onto the windshield 200 of the vehicle, and the second display module 112 projects a second virtual image information B onto the windshield 200 of the vehicle. A control module 120 is electrically connected to the first display module 111 and the second display module 112, respectively, and is used to control the operating state of the first display module 111 and the second display module 112, such as controlling the opening, closing, brightness adjustment, or image switching of each display module.

[0038] The first display module 111 includes a first image generation unit and a first optical projection component; the second display module 112 includes a second image generation unit and a second optical projection component.

[0039] The first image generation unit and the second image generation unit can be of various types, such as TFT-LCD (Thin-Film Transistor Liquid Crystal Display), LBS (Laser Beam Scanning), LCOS (Liquid Crystal on Silicon), and DLP (Digital Light Processing).

[0040] The resolution of the first image generation unit is no less than 1080P, and it is used to generate long-distance related information such as navigation paths and ADAS warnings (lane departure, following distance, etc.).

[0041] The second image generation unit can use an ultra-wide display panel with a Mini-LED light source, with a peak visible brightness of not less than 1200 nits, to generate conventional driving information such as vehicle speed, engine speed, fuel level, and light indicators.

[0042] An optical projection assembly is an optical element or group of elements located on the light-emitting side of the image generation unit, used to expand, collimate, correct distortion, or fold the optical path of image light. The first and second optical projection assemblies can be configured independently, for example, using a single distortion correction lens or a lens group composed of multiple lenses.

[0043] For example, the first optical projection component includes a freeform reflector for adjusting the optical path of the image light generated by the first image generation unit and projecting it onto the upper display area of ​​the windshield 200. As another example, the second optical projection component includes a reflector and a distortion correction lens, projecting onto the edge of the black coating 220 area (BM area) of the windshield 200 to achieve panoramic coverage from the A-pillar to the A-pillar of the vehicle.

[0044] Please continue reading. Figure 2 In a first specific embodiment, in order to guide the first virtual image information A and the second virtual image information B generated by the first display module 111 and the second display module 112 to different areas of the windshield 200, the head-up display system 100 further includes a first reflection unit 131. The first reflection unit 131 is disposed on the light-emitting side of the first display module 111 and the second display module 112. The first light emitted by the first display module 111 and the second light emitted by the second display module 112 are reflected by the first reflection unit 131 and projected onto different areas of the windshield 200 at different emission angles, thereby forming a first projection area and a second projection area that are separated from each other on the windshield 200.

[0045] Compared to a single-module image segmentation scheme, the use of a shared reflection unit between the first display module 111 and the second display module 112 offers the following advantages: The display states of the first display module 111 and the second display module 112 are independent; if one display module fails or needs upgrading, the other can still function normally, improving the reliability of the head-up display system 100. Furthermore, the shared first reflection unit 131 between the first display module 111 and the second display module 112 avoids optical path interference and increased size associated with multiple reflection units, facilitating miniaturized integration.

[0046] In this embodiment, the head-up display system 100 further includes a second reflecting unit 132, which is disposed between the first reflecting unit 131 and the first display module 111. The first light emitted from the first display module 111 undergoes a first reflection by the second reflecting unit 132, and a second reflection by the first reflecting unit 131, before finally being projected onto the windshield. The reflection of the first light between the first reflecting unit 131 and the second reflecting unit 132 creates a light path fold, which helps save space and reduce the overall size of the device.

[0047] To facilitate the adjustability of the head-up display system 100, the second reflective unit 132 and / or the first display module 111 can be rotated by a motor drive, or other movable adjustment methods can be adopted, which are not limited here.

[0048] The specific optical path propagation in this embodiment can be as follows: The first light beam emitted from the first display module 111 is first reflected by the second reflection unit 132, then reflected by the first reflection unit 131, and finally projected onto the upper half of the windshield 200. After being reflected by the windshield 200, it enters the eye box 300. The second light beam emitted from the second display module 112 is directly reflected by the first reflection unit 131 and projected onto the lower half of the windshield 200. After being reflected by the windshield 200, it enters the eye box 300. Thus, the first and second light beams are projected onto different areas of the windshield 200 at different emission angles, forming separate first and second projection areas.

[0049] The first reflecting unit 131 and the second reflecting unit 132 can be either plane mirrors or curved mirrors, depending on the required degree of optical path folding and imaging quality requirements. The relative position and angle of the two reflecting units can be independently calibrated based on the curvature of the windshield 200 and the position of the eye box 300, thereby achieving a flexible system layout.

[0050] Through the aforementioned optical path design, the first display module 111 and its optical path can provide a head-up display function to display virtual images of navigation or AR augmented reality fusion; the second display module 112 and its optical path can provide a panoramic head-up display function to display conventional driving information such as vehicle speed, engine speed, fuel level, and light indicators. Since the first display module 111 and the second display module 112 share the first reflective unit 131, the head-up display system 100 can be manufactured in a smaller size, allowing it to be placed inside the vehicle's dashboard, saving interior space and improving layout flexibility.

[0051] Please see Figure 3 , Figure 3 This is a schematic diagram of a third structure of the head-up display system provided in the embodiments of this application.

[0052] In a second specific embodiment, to guide the virtual images generated by the first display module 111 and the second display module 112 to different areas of the windshield 200, the head-up display system 100 further includes a third reflection unit 133, a fourth reflection unit 134, and a fifth reflection unit 135. The third reflection unit 133 and the fourth reflection unit 134 are sequentially disposed on the light-emitting side of the first display module 111 to reflect the first light emitted by the first display module 111; the fifth reflection unit 135 is sequentially disposed on the light-emitting side of the second display module 112 to reflect the second light emitted by the second display module 112. Through this arrangement, the first light and the second light, each guided by an independent reflection unit, are projected onto different areas of the windshield 200 at different emission angles, forming separate first projection areas and second projection areas.

[0053] The second display module 112 and the fourth reflective unit 134 can be integrated into a single integrated device C. This integration reduces the number of independent mounting components within the system, shrinks the overall size, and reduces optical path deviations caused by accumulated assembly tolerances, thereby improving the optical consistency and reliability of the system.

[0054] For example, the third reflection unit 133, the fourth reflection unit 134 and / or the fifth reflection unit 135 may be a plane mirror or a curved mirror, depending on the required degree of optical path folding and imaging quality requirements.

[0055] Therefore, by configuring independent reflection units for the first display module 111 and the second display module 112, and combining them with a modular integrated design, this embodiment improves the design freedom, assembly convenience and optical performance of the head-up display system 100 while ensuring the zoned projection effect.

[0056] Please see Figure 4 , Figure 4This is a schematic diagram of a fourth structure of the head-up display system provided in this application embodiment. In a third specific embodiment, the display module 110 can simultaneously emit a first light beam and a second light beam, and the head-up display system 100 further includes a beam splitter 140. The beam splitter 140 is disposed on the light-emitting side of the display module 110, and the beam splitter 140 is used to reflect the first light beam emitted by the display module 110 and transmit the second light beam emitted by the display module 110.

[0057] With the above configuration, the light emitted from the display module 110 is split into two paths after passing through the beam splitter 140: the first light is reflected by the beam splitter 140 and finally projected onto the upper half of the windshield 200, then enters the eye box 300 after being reflected by the windshield 200; the second light passes through the beam splitter 140 and finally projects onto the lower half of the windshield 200, then enters the eye box 300 after being reflected by the windshield 200. Thus, the two light rays form separate projection areas on the windshield 200, each used to present different types of information.

[0058] Specifically, the beam splitter 140 can be made of flat glass or a prism structure, with its reflective surface coated with a semi-transparent and semi-reflective film. For example, a high reflectivity (e.g., greater than 90%) is set for the first light ray, and a high transmittance (e.g., greater than 90%) is set for the second light ray. The beam splitter 140 can also be made of a liquid crystal layer structure, with the transmittance-to-reflection ratio adjusted electronically.

[0059] Therefore, the beam splitter 140 has a simple structure and small size, which can further reduce the space occupied by the optical system and facilitate the integration of the head-up display system 100 into the dashboard of a vehicle with limited space. By adjusting the reflection and transmission ratio of the beam splitter 140, the energy distribution of the two light rays can be controlled independently, thereby adjusting the brightness of different virtual image information as needed, such as making navigation warning information brighter and basic instrument information relatively softer, thus optimizing the driver's visual perception.

[0060] It should be noted that the reflection and transmission functions of the beam splitter 140 are interchangeable, i.e., reflecting the second ray and transmitting the first ray, depending on the arrangement of the two display modules and the direction of the optical path. Furthermore, the beam splitter 140 can also integrate wavelength selection functions, such as reflecting the red light band and transmitting the green and blue light bands, to achieve zoned projection of color information. These variations all fall within the scope of protection of this application.

[0061] In this embodiment, the head-up display system 100 further includes a sixth reflection unit 136, which is disposed between the beam splitter 140 and the display module 110. Light emitted from the display module 110 is reflected by the sixth reflection unit 136 and then emitted towards the beam splitter 140, thereby flexibly adjusting the incident angle without changing the orientation of the display module 110, which is beneficial for optimizing the optical path layout.

[0062] The head-up display system 100 also includes a seventh reflection unit 137, which is disposed on the light-emitting side of the beam splitter 140. The second light beam transmitted through the beam splitter 140 is reflected by the seventh reflection unit 137 and projected onto the windshield 200. By adding the seventh reflection unit 137, the optical path of the second light beam can be extended or its emission direction can be changed, making the position adjustment of the second projection area more flexible and adaptable to the tilt angle of the windshield 200 of different vehicle models.

[0063] For example, the sixth reflection unit 136 and the seventh reflection unit 137 may be plane mirrors or curved mirrors, depending on the required degree of optical path folding and imaging quality requirements.

[0064] In the above embodiments, the windshield 200 underwent targeted treatment to optimize the optical display effect. Please refer to [link / reference]. Figure 5 , Figure 5 This is a schematic diagram of the windshield structure provided in an embodiment of this application. To address the common double-image ghosting problem caused by the first display module 111 and its optical path providing a head-up display function, the windshield 200 is reinforced with a wedge-shaped film 210, which can be a polyvinyl butyral (PVB) film. By setting an appropriate wedge angle, such as 0.3 mrad to 0.7 mrad, the wedge-shaped film 210 ensures that the reflected light paths from the inner and outer surfaces of the windshield 200 coincide, thereby eliminating ghosting and guaranteeing the clarity of the first virtual image information A.

[0065] For the panoramic head-up display function provided by the second display module 112 and its optical path, due to the requirements of high contrast, high brightness and stray light suppression, a black coating 220 is provided in the lower non-display area of ​​the windshield 200, which is located at the display edge of the second virtual image information B. This black coating 220 can absorb ambient light and stray light, thereby improving the contrast and brightness of the second virtual image information B.

[0066] In some embodiments, please refer to Figure 6 , Figure 6 This is a fifth structural diagram of the head-up display system provided in the embodiments of this application. The head-up display system 100 also includes an environmental perception module 150, which is electrically connected to the control module 120 and is used to collect environmental data and vehicle status data. The control module 120 dynamically adjusts the display content of the first virtual image information A and the second virtual image information B and the start / stop status of the display module 110 according to the data collected by the environmental perception module 150.

[0067] The control module 120 is used to identify the current driving scenario based on the data collected by the environment perception module 150. The driving scenario includes a normal driving scenario, a complex road condition scenario, and a low-speed scenario. The control module 120 is also used to switch to the corresponding collaborative display mode according to the current driving scenario.

[0068] Specifically, the environmental perception module 150 collects multi-dimensional data in real time, including ambient light intensity, driver's line-of-sight focus position, road conditions (such as lane lines, obstacles, traffic lights), and vehicle operation data (such as vehicle speed, engine speed, fuel level, and navigation information), and transmits the collected data to the control module 120 in real time. Based on the above data, the control module 120 comprehensively judges the current driving scenario and then dynamically adjusts the display strategy of the first virtual image information A and the second virtual image information B to achieve scene-adaptive collaborative display.

[0069] In addition, the control module 120 is used to perform the following steps when switching to the corresponding collaborative display mode according to the current driving scenario.

[0070] When the driving scenario is a standard driving scenario, the first virtual image information A displays navigation prompts, while the second virtual image information B displays basic driving information in full screen, such as vehicle speed, engine speed, fuel consumption, and headlight status. A standard driving scenario involves speeds of 10-120 km / h, good road conditions, and no significant obstacles. In this scenario, the driver's attention is primarily focused on the road ahead. Navigation information is placed in the upper, distant area, while basic information is placed in the lower, closer area, with neither interfering with the other, thus meeting daily driving needs.

[0071] When the driving scenario involves complex road conditions, the first virtual image information A is controlled to expand its display field of view and overlay warning information, while the second virtual image information B is controlled to shrink its display area and reduce its brightness. Complex road conditions include speeds of 0-120 km / h, complex road conditions (blurred lane lines, dense surrounding traffic, obstacles, pedestrian-heavy areas, rain or snow), or scenarios at urban intersections or on congested highways. Warning information can include pedestrian collision warnings and side-approach vehicle alerts. In this scenario, by expanding the field of view of the first virtual image information A, the augmented reality warning information can cover a wider forward field of vision, reducing the driver's blind spots; by shrinking the display area of ​​the second virtual image information B and reducing its brightness, visual interference from basic information on the warning information is avoided, allowing the driver to prioritize safety warnings.

[0072] For example, in complex road conditions, the control module 120 is used to prioritize enhancing the warning function of the first virtual image information A while reducing the interference of the second virtual image information B, so as to achieve hierarchical presentation of driving information.

[0073] Specifically, the control module 120 controls the first virtual image information A to expand its display field of view and overlays warning information and road condition marking information from the Advanced Driver Assistance System (ADAS). Simultaneously, the imaging distance of the first virtual image information A is adjusted to 3 to 5 meters to match the spatial position of actual obstacles or vehicles ahead, enhancing the intuitiveness of the virtual-real fusion. For the second virtual image information B, the control module 120 controls its display area to shrink to the central core area of ​​the windshield 200, retaining only the highest priority information such as vehicle speed and braking warnings, and reduces the display brightness of the second virtual image information B by 30%, while simultaneously increasing the display contrast of the first virtual image information A.

[0074] When the driving scenario is low-speed, the second virtual image information B is controlled to display parking assistance information in full screen, while the first virtual image information A is controlled to stop projection or only display distance prompts. Low-speed scenarios include parking, traffic jams, and crawling. A low-speed scenario is a scenario with a vehicle speed of 10 km / h. Parking assistance information can include panoramic images, reversing trajectory, and distance prompts. In this scenario, the driver's need for navigation and basic instruments is reduced, while the need for perception of the surrounding environment is greatly increased. Full-screen display of parking assistance information can make full use of the wide field of view advantage of the lower projection area to help the driver control the vehicle precisely; at the same time, the display of the first virtual image information A is stopped or simplified to avoid information redundancy.

[0075] For example, in a low-speed parking scenario, the control module 120 simplifies the first virtual image information A and enhances the second virtual image information B to focus on the driver's perception needs of the surrounding environment.

[0076] Specifically, the control module 120 controls the first virtual image information A to stop projection, or only displays concise distance prompts (such as the remaining centimeters between the front of the vehicle and the obstacle) to avoid information redundancy that may interfere with the driver. At the same time, the control module 120 controls the second virtual image information B to display full-screen panoramic parking assistance information, including the distance to obstacles around the vehicle, reversing trajectory lines, parking space markings, etc., and adjusts the imaging distance of the second virtual image information B to 1 to 2 meters.

[0077] The collaborative display control provided in this application embodiment, which combines environmental perception and scene adaptation, can dynamically adjust information priority according to the driving scenario, avoid information overload or omission, and improve driving safety. Furthermore, the switching of partition display strategies in different scenarios is completed automatically by the system without manual operation by the driver. Moreover, by controlling the start and stop status of the display module 110, unnecessary virtual images can be turned off in specific scenarios, reducing system power consumption and extending the life of optical components.

[0078] In some embodiments, the control module 120 is also used to adjust the display brightness of the first virtual image information A and the second virtual image information B in real time according to ambient light intensity data, so as to solve the problems of unclear display under strong light and glare under weak light. At the same time, the control module 120 finely adjusts the projection position of the two virtual image information according to the driver's line of sight focus position, so that the information is always in the driver's field of vision for easy reading. In addition, the control module 120 performs pre-distortion correction on the first virtual image information A and the second virtual image information B respectively according to the surface shape and installation angle of the windshield 200 through a built-in reverse distortion algorithm, so as to eliminate dynamic distortion and corner deformation and ensure the geometric fidelity of the virtual image.

[0079] In some embodiments, the driver can manually switch the display coordination mode and adjust the display content and brightness using steering wheel buttons or voice commands. Upon receiving the manual command, the control module 120 updates the display status of the first virtual image information A and the second virtual image information B in real time and saves the current user preference settings. When the same driving scenario occurs again, the head-up display system 100 automatically adapts to the user preference, eliminating the need for repeated manual adjustments.

[0080] In some embodiments, the head-up display system 100 further includes a housing. The housing has a receiving cavity for accommodating the aforementioned display module 110 and control module 120, and provides physical support and environmental protection (such as dustproofing, moisture protection, and heat dissipation) for the internal optical components. The housing can be fixed to the lower part of the vehicle's dashboard, i.e., the interior space of the instrument panel. The lower part of the dashboard is typically an unused area between the dashboard crossbeam and the air conditioning ducts; installing the housing here does not occupy passenger space in the driver's cabin and facilitates light projection onto the windshield 200 through the housing's light outlet.

[0081] To resist vibrations and impacts during vehicle operation, a shock-absorbing and buffering structure is provided within the housing cavity. Exemplarily, the shock-absorbing and buffering structure can be a silicone pad, a spring damper, or a foam pad, arranged between the display module 110 and the inner wall of the housing. This structure can absorb high-frequency vibrations from the road surface and instantaneous impacts during vehicle collisions, preventing displacement or damage to optical components, thereby ensuring the long-term stability and display accuracy of the virtual image.

[0082] In addition, the head-up display system 100 also includes an adjustment bracket that connects the housing to the vehicle's dashboard crossbeam or floor frame. The adjustment bracket is a mechanical connector that allows for adjustable angle or position, such as a sheet metal part with an elongated hole or a ball joint mechanism. Because the tilt angle of the windshield 200 varies between different vehicle models (typically 25° to 35°), and because there are tolerances in the production and assembly of the windshield 200 for the same vehicle model, the adjustment bracket is used to accommodate these differences.

[0083] Please see Figure 7 , Figure 7This is a flowchart illustrating a control method for a head-up display system provided in an embodiment of this application. This application also provides a control method for a head-up display system 100, applied to the aforementioned head-up display system 100. The control method for the head-up display system 100 includes the following steps.

[0084] S1. Collect environmental data and vehicle status data.

[0085] Environmental data includes ambient light intensity, road conditions (lane lines, obstacles, traffic lights, etc.), and the driver's line-of-sight focus; vehicle status data includes vehicle speed, engine speed, fuel level, navigation information, etc. The environmental perception module 150, such as a camera, millimeter-wave radar, or GPS, can collect the above data in real time at a frequency of at least 30Hz.

[0086] S2. Identify the current driving scenario based on the collected data.

[0087] Driving scenarios are categorized into at least three types: conventional driving scenarios (highway cruising, smooth urban roads), complex road condition scenarios (intersections, pedestrian-intensive areas, rainy or snowy weather), and low-speed scenarios (parking, congested crawling). For example, when the vehicle speed is below 10 km / h and the ultrasonic radar detects a nearby obstacle, it is classified as a low-speed parking scenario; when lane lines are blurred, a pedestrian is crossing ahead, and the vehicle speed is moderate, it is classified as a complex road condition scenario.

[0088] S3. Based on the identified driving scenario, adjust the display content of the first virtual image information A and the second virtual image information B and the start / stop status of the display module 110.

[0089] The adjustment strategies for different driving scenarios are as follows.

[0090] In normal driving scenarios, the first virtual image information A displays navigation prompts, with an imaging distance of 7 to 15 meters; the second virtual image information B displays basic driving information in full screen, such as vehicle speed, engine speed, and fuel consumption, with an imaging distance of 2 to 3 meters. Both display modules 110 remain active.

[0091] In complex road conditions, the first virtual image information A expands the field of view and superimposes ADAS warnings (such as pedestrian collision warning and lane departure warning), and the imaging distance is adjusted to 3-5 meters; the second virtual image information B shrinks to the central core area, retaining only vehicle speed and braking prompts, reducing brightness by 30%, while improving the contrast of the first virtual image information A.

[0092] In low-speed scenarios, the first virtual image information A stops projection or only displays a distance prompt (such as "0.5m"); the second virtual image information B displays full-screen panoramic parking assistance information, such as obstacle distance and reversing trajectory, with the imaging distance adjusted to 1 to 2 meters.

[0093] Through the above steps, this control method can automatically switch display modes according to the real-time driving environment, realizing hierarchical presentation of information priority. Compared with the existing technology's fixed display content that requires manual adjustment, this method reduces the driver's cognitive load, shortens emergency response time, and balances information richness and visual interference in different scenarios, significantly improving the performance and driving safety of the head-up display system 100.

[0094] In some embodiments, the control method of the head-up display system 100 further includes: adjusting the display brightness of the first virtual image information A and the second virtual image information B in real time according to ambient light intensity data to solve the problems of unclear display under strong light and glare under weak light. The control method of the head-up display system 100 also includes: finely adjusting the projection position of the two virtual image information paths according to the driver's line-of-sight focus position, so that the information is always within the driver's convenient reading area. Furthermore, the control method of the head-up display system 100 also includes: performing pre-distortion correction on the first virtual image information A and the second virtual image information B respectively using a built-in inverse distortion algorithm according to the surface shape and installation angle of the windshield 200, to eliminate dynamic distortion and corner deformation, and ensure the geometric fidelity of the virtual image.

[0095] In some embodiments, when the driver manually switches the display coordination mode and adjusts the display content and brightness via steering wheel buttons or voice commands, the control method of the head-up display system 100 further includes: updating the display status of the first virtual image information A and the second virtual image information B in real time after receiving the manual command, and saving the current user preference settings. Furthermore, the control method of the head-up display system 100 also includes: when the same driving scenario occurs again, controlling the head-up display system 100 to automatically adapt to the user preference, without requiring repeated manual adjustments.

[0096] This application also provides a computer device, the computer device including: one or more processors; a memory; and one or more application programs, wherein the one or more application programs are stored in the memory and configured to be executed by the processor to implement the control method of the head-up display system 100 described above, thereby realizing various functions, as follows.

[0097] Collect environmental data and vehicle status data; Identify the current driving scenario based on the collected data; Based on the identified driving scenario, the display content of the first virtual image information A and the second virtual image information B are adjusted in relation to the start / stop status of the display module 110.

[0098] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by instructions, or by instructions controlling related hardware. These instructions can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0099] This application provides a computer-readable storage medium storing a computer program that is loaded by a processor to perform the steps in the control method of the head-up display system 100 described above. For example, the computer program loaded by the processor can perform the following steps: Collect environmental data and vehicle status data; Identify the current driving scenario based on the collected data; Based on the identified driving scenario, the display content of the first virtual image information A and the second virtual image information B are adjusted in relation to the start / stop status of the display module 110.

[0100] This application also provides a vehicle that includes the head-up display system 100 described in the above embodiments.

[0101] Specifically, the vehicle refers to a motor vehicle with a windshield 200 and dashboard space, including but not limited to passenger cars, commercial vehicles, or new energy vehicles. The head-up display system 100, as an auxiliary driving component, is installed inside the dashboard, with its light outlet facing the windshield 200. By integrating the head-up display system 100 into the vehicle, the existing windshield 200 can be fully utilized as a virtual image projection carrier, eliminating the need for an additional display screen and thus reducing visual clutter in the cockpit.

[0102] The vehicle also includes an optical coating, which can be an anti-reflective coating. This optical coating is applied to the display area of ​​the windshield 200 to reduce optical crosstalk.

[0103] Compared to vehicles without a head-up display system 100 or with only a single-area head-up display system 100, the vehicle in this embodiment has the following advantages: First, by projecting first virtual image information A (such as navigation and warning) and second virtual image information B (such as vehicle speed and parking assistance) into different areas of the windshield 200, the information is presented in a partitioned manner. The driver can obtain multiple types of driving data simultaneously without looking down, significantly shortening the time for eye movement. Second, combined with the environmental perception module 150 and scene adaptive control, the vehicle can automatically switch display modes in different scenarios such as complex road conditions and low-speed parking, reducing the driver's manual operation burden and improving the level of intelligence in human-machine interaction. Third, the compact design of the head-up display system 100, such as using a shared reflector unit or a beam splitter 140, makes it easy to install inside the vehicle's dashboard without modifying the original vehicle structure, and has good platform adaptability and versatility.

[0104] The vehicle provided in this application embodiment, by being equipped with the head-up display system 100, can provide a richer, clearer, and more intelligent way of presenting information while ensuring driving safety, thereby enhancing the technological feel and user experience of the entire vehicle.

[0105] In summary, the head-up display system 100, the control method for the head-up display system 100, and the vehicle provided in this application embodiment are described above. The head-up display system 100 is applied to a vehicle. The head-up display system 100 includes a display module 110 and a control module 120. The display module 110 projects first virtual image information A and second virtual image information B onto the windshield 200 of the vehicle. The control module 120 is electrically connected to the display module 110 and controls the display state of the first virtual image information A and the second virtual image information B. The first virtual image information A and the second virtual image information B are projected onto different areas on the windshield 200. By projecting different types of information to different areas, such as projecting basic instrument information into the area below the driver's field of vision and projecting safety warning information into the area directly in front of the driver's field of vision, spatial partitioning of information can be achieved. Therefore, the head-up display system 100 can achieve multi-information partitioning projection, effectively improving information readability and driving safety.

[0106] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0107] In the description of this application, 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, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0108] The head-up display system, its control method, and the vehicle provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application, and the descriptions of the embodiments above are only for the purpose of helping to understand this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A head-up display system, characterized in that, The head-up display system, used in vehicles, includes: The display module is used to project first virtual image information and second virtual image information onto the windshield of the vehicle. The control module is electrically connected to the display module and is used to control the display state of the first virtual image information and the second virtual image information; The first virtual image information and the second virtual image information are projected onto different areas of the windshield.

2. The head-up display system according to claim 1, characterized in that, The display module includes a first display module and a second display module. The first display module is used to project the first virtual image information onto the windshield of the vehicle, and the second display module is used to project the second virtual image information onto the windshield of the vehicle. The control module is electrically connected to the first display module and the second display module respectively, and is used to control the working state of the first display module and the second display module.

3. The head-up display system according to claim 2, characterized in that, It also includes a first reflective unit, which is disposed on the light-emitting side of the first display module and the second display module. The first light emitted by the first display module and the second light emitted by the second display module are reflected by the first reflective unit and then projected onto different areas of the windshield.

4. The head-up display system according to claim 1, characterized in that, It also includes a beam splitter, which is disposed on the light-emitting side of the display module. The beam splitter is used to reflect the first light emitted by the display module and transmit the second light emitted by the display module.

5. The head-up display system according to any one of claims 1 to 4, characterized in that, It also includes an environmental perception module, which is electrically connected to the control module and is used to collect environmental data and vehicle status data; the control module dynamically adjusts the display content of the first virtual image information and the second virtual image information and the start / stop status of the display module according to the data collected by the environmental perception module.

6. The head-up display system according to claim 5, characterized in that, The control module is used to identify the current driving scenario based on the data collected by the environment perception module. The driving scenario includes a normal driving scenario, a complex road condition scenario, and a low-speed scenario. The control module is also used to switch to the corresponding collaborative display mode according to the current driving scenario.

7. The head-up display system according to claim 6, characterized in that, The control module is further configured to switch to the corresponding collaborative display mode based on the current driving scenario, and the control module is also configured to: When the driving scenario is a normal driving scenario, the first virtual image information is controlled to be navigation prompt information, and the second virtual image information is controlled to be basic driving information displayed in full screen; When the driving scenario is a complex road condition scenario, the first virtual image information is controlled to expand the display field of view and superimpose warning information, while the second virtual image information is controlled to shrink the display area and reduce brightness; When the driving scenario is a low-speed scenario, the second virtual image information is controlled to display parking assistance information in full screen, and the first virtual image information is controlled to stop projection or only display distance prompt information.

8. The head-up display system according to any one of claims 1 to 4, characterized in that, The first virtual image information is long-distance virtual imaging information, and the second virtual image information is short-distance virtual imaging information; the first virtual image information is projected onto the upper area of ​​the windshield, and the second virtual image information is projected onto the lower area of ​​the windshield.

9. A control method for a head-up display system, characterized in that, The head-up display system according to any one of claims 1 to 8, wherein the control method of the head-up display system comprises: Collect environmental data and vehicle status data; Identify the current driving scenario based on the collected data; Based on the identified driving scenario, adjust the display content of the first virtual image information and the second virtual image information, as well as the start / stop status of the display module.

10. A vehicle, characterized in that, Includes the head-up display system according to any one of claims 1 to 8.

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