Vehicle HUD accurate imaging system and method

Abstract

The invention provides a vehicle HUD accurate imaging system and method, and relates to the technical field of vehicle imaging display. Comprising a vehicle body domain controller which is used for collecting road condition information around and behind a vehicle provided by a vehicle body camera, collecting distance information between the vehicle and surrounding objects provided by a parking radar, calculating a trajectory chart of the vehicle under the current steering angle, and integrally sending the information to be displayed to an HUD (Head Up Display) system; the HUD system is used for displaying information to be displayed on front windshield glass by using a projection optical assembly; and the control module is also used for acquiring the display position and display size adjustment information of the to-be-displayed information on the front windshield glass by the user, and adjusting the projection optical assembly according to the adjustment information. According to the invention, a driver can conveniently look up to watch various information during backing, the driving safety is improved, and the imaging position and size can be customized in a personalized manner according to the heights and habits of different drivers.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle imaging display, and in particular relates to a vehicle HUD accurate imaging system and method. Background Art

[0002] With the popularity of vehicles, the demand for vehicle driving safety has become increasingly stringent, and active safety has become a new direction for the development of automotive electronics. Car reversing is a necessary skill for every driver, but it is affected by driving skills, driver's vision, etc., which can easily cause many accidents. In view of the unprecedented prosperity of the current automobile industry, the popularity of household cars is getting higher and higher, and more and more novice drivers have difficulty reversing. Therefore, the auxiliary functions for car reversing need to be more convenient and simple.

[0003] Even if the reversing image and reversing radar system are installed, the following technical problems still exist in the prior art:

[0004] (1) When reversing, more and more novice drivers often need to tilt their heads to look at the reversing image on the central control screen, frequently observe the left and right rearview mirrors to pay attention to the distance between the vehicle and surrounding objects, and then turn the steering wheel to adjust the driving posture of the car. Drivers need to turn their heads frequently for a long time, which increases the discomfort of the neck and reduces the physical fitness of fellow passengers.

[0005] (2) In addition, the driver must also pay attention to the road conditions in front of the vehicle, etc., and needs to "task multiple things at once", which can easily cause novice drivers to be afraid of reversing or even afraid of reversing.

[0006] (3) Achieving a perfect reverse maneuver requires multiple attempts, which increases time costs and causes some major or minor troubles to the driver and passengers.

[0007] (4) When parking in an underground garage, the lighting environment in the garage is generally not as good as the natural light outside. When a novice driver reverses into the garage in a poorly lit environment, it is very easy to make certain errors, which may lead to accidents. Summary of the invention

[0008] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a vehicle HUD accurate imaging system and method, which can utilize the HUD head-up display system to display the road condition information around and behind the vehicle, the distance information between the vehicle and surrounding objects, and the vehicle trajectory map in a "three-in-one" unified manner, so that the driver can look up and view a variety of information when reversing, thereby improving driving safety, and can customize the imaging position and size according to the height and habits of different drivers, so as to meet the need to distinguish the "three-in-one" unified information from the actual scene in front of the vehicle when parking in poor lighting conditions.

[0009] To achieve the above objectives, one or more embodiments of the present invention provide the following technical solutions:

[0010] A first aspect of the present invention provides an accurate imaging system for a vehicle HUD.

[0011] Vehicle HUD accurate imaging system, including HUD head-up display system, body domain controller, body camera and parking radar, including:

[0012] The body domain controller is used to collect the road condition information around and behind the vehicle provided by the body camera, collect the distance information between the vehicle and surrounding objects provided by the parking radar, calculate the trajectory diagram of the vehicle under the current steering angle, and send the above information to be displayed as a whole to the HUD head-up display system after obtaining the reverse gear signal;

[0013] The HUD head-up display system is used to receive information to be displayed, including road condition information around and behind the vehicle, distance information between the vehicle and surrounding objects, and a vehicle trajectory map, and display the information to be displayed on the front windshield using a projection optical component;

[0014] It is also used to obtain the user's adjustment information on the display position and display size of the information to be displayed on the front windshield, and adjust the projection optical component according to the adjustment information until the user is satisfied with the display position and display size of the information to be displayed on the front windshield.

[0015] A second aspect of the present invention provides a method for accurate imaging of a vehicle HUD.

[0016] The vehicle HUD accurate imaging method comprises the following steps:

[0017] After receiving the reverse gear signal, the body domain controller collects the road condition information around and behind the vehicle provided by the body camera, collects the distance information between the vehicle and surrounding objects provided by the parking radar, and calculates the trajectory of the vehicle under the current steering angle, and sends the above information to be displayed as a whole to the HUD head-up display system;

[0018] The HUD head-up display system receives information to be displayed, including road conditions around and behind the vehicle, distance information between the vehicle and surrounding objects, and a vehicle trajectory map, and displays the information to be displayed on the front windshield using a projection optical component;

[0019] After the information to be displayed is displayed on the front windshield, the HUD head-up display system obtains the user's adjustment information on the display position and display size of the information to be displayed on the front windshield, and adjusts the projection optical component according to the adjustment information until the user is satisfied with the display position and display size of the information to be displayed on the front windshield.

[0020] One or more of the above technical solutions have the following beneficial effects:

[0021] The present invention provides a vehicle HUD accurate imaging system and method, which can use the HUD head-up display system to display the road condition information around and behind the vehicle, the distance information between the vehicle and surrounding objects, and the vehicle trajectory map in a "three-in-one" unified manner, so that the driver can look up and view a variety of information when reversing, without having to tilt his head to view the reversing image on the central control large screen, or turn his head left and right to observe the distance between the vehicle and surrounding objects, etc., thereby improving driving safety and driving experience as a whole.

[0022] The HUD head-up display system designed by the present invention includes a first curved mirror and a second curved mirror, and a first transmission component that drives the first curved mirror to flip and move, and a second transmission component that drives the second curved mirror to flip and move. After displaying information to be displayed on the front windshield, the HUD head-up display system obtains user adjustment information on the display position and display size of the information to be displayed on the front windshield, and adjusts the projection optical component according to the adjustment information until the user is satisfied with the display position and display size of the information to be displayed on the front windshield, thereby realizing personalized customization of imaging position and size according to the height and habits of different drivers.

[0023] The present invention adjusts the display position and display size of the information to be displayed on the front windshield, and can also meet the driver's need to distinguish between the "three-in-one" unified information and the actual scene in front of the vehicle when parking in poor lighting conditions. When performing personalized display for different drivers, the driver's ability to effectively distinguish the real scene in the driving field of view from the information to be displayed when reversing is used as a criterion to determine whether the driver is satisfied with the display position and display size of the information to be displayed on the front windshield, thereby improving parking safety and being applicable to a variety of parking environments.

[0024] Advantages of additional aspects of the present invention will be given in part in the following description, and in part will become obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0026] Figure 1 This is a system structure diagram of embodiment 1.

[0027] Figure 2 This is a schematic diagram of optical imaging of a vehicle head-up display (HUD) according to Example 1.

[0028] Figure 3This is an exploded view of the overall structure of the HUD head-up display system of Example 1.

[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0030] 1 image generation unit PGU, 2 projection optical component, 3 first curved mirror, 4 second curved mirror, 5 first set optical path, 6 second set optical path, 7 third set optical path, 8 fourth set optical path, 9 front windshield, 10 engine cover, 11 virtual imaging, 12 image distance, 13 field of view, 14 lower viewing angle, 15 eye box, 16 eye eli pse, 17 radiator, 18 base, 19 upper cover, 20 dustproof film, 21 PCB assembly, 22 first transmission assembly, 23 assembly cover. DETAILED DESCRIPTION

[0031] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0032] It should be noted that the terms used herein are for describing specific embodiments only and are not intended to be limiting of exemplary embodiments according to the present invention.

[0033] In the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0034] Embodiment 1

[0035] As mentioned above, the prior art has the following technical problems:

[0036] (1) When reversing, more and more novice drivers often need to tilt their heads to look at the reversing image on the central control screen, frequently observe the left and right rearview mirrors to pay attention to the distance between the vehicle and surrounding objects, and then turn the steering wheel to adjust the driving posture of the car. Drivers need to turn their heads frequently for a long time, which increases the discomfort of the neck and reduces the physical fitness of fellow passengers.

[0037] (2) In addition, the driver must also pay attention to the road conditions in front of the vehicle, etc., and needs to "task multiple things at once", which can easily cause novice drivers to be afraid of reversing or even afraid of reversing.

[0038] (3) Achieving a perfect reverse maneuver requires multiple attempts, which increases time costs and causes some major or minor troubles to the driver and passengers.

[0039] (4) When parking in an underground garage, the lighting environment in the garage is generally not as good as the natural light outside. When a novice driver reverses into the garage in a poorly lit environment, it is very easy to make certain errors, which may lead to accidents.

[0040] In view of the above technical problems, this embodiment discloses a vehicle HUD accurate imaging system. Figure 1 As shown, the vehicle HUD accurate imaging system includes a HUD head-up display system, a body domain controller, a body camera and a parking radar, among which:

[0041] The body domain controller is used to collect the road condition information around and behind the vehicle provided by the body camera, collect the distance information between the vehicle and surrounding objects provided by the parking radar, calculate the trajectory diagram of the vehicle under the current steering angle, and send the above information to be displayed as a whole to the HUD head-up display system after obtaining the reverse gear signal;

[0042] The HUD head-up display system is used to receive information to be displayed, including road condition information around and behind the vehicle, distance information between the vehicle and surrounding objects, and a vehicle trajectory map, and display the information to be displayed on the front windshield 9 using the projection optical component 2;

[0043] It is also used to obtain the user's adjustment information on the display position and display size of the information to be displayed on the front windshield 9, and adjust the projection optical component 2 according to the adjustment information until the user is satisfied with the display position and display size of the information to be displayed on the front windshield 9.

[0044] The present embodiment provides a vehicle HUD accurate imaging system and method, which can use the HUD head-up display system to display the road conditions around and behind the vehicle, the distance information between the vehicle and surrounding objects, and the vehicle trajectory map in a "three-in-one" unified manner, so that the driver can look up and view a variety of information when reversing, without having to tilt his head to view the reversing image on the large central control screen, or turn his head left and right to observe the distance between the vehicle and surrounding objects, etc., thereby improving driving safety and driving experience as a whole.

[0045] The HUD head-up display system designed in this embodiment includes a first curved mirror 3 and a second curved mirror 4, a first transmission component 22 for driving the first curved mirror 3 to flip and move, and a second transmission component (not shown in the figure) for driving the second curved mirror 4 to flip and move. After the information to be displayed is displayed on the front windshield 9, the HUD head-up display system obtains the user's adjustment information on the display position and display size of the information to be displayed on the front windshield 9, and adjusts the projection optical component 2 according to the adjustment information until the user is satisfied with the display position and display size of the information to be displayed on the front windshield 9, thereby realizing personalized customization of the imaging position and size according to the height and habits of different drivers.

[0046] The above-mentioned adjustment of the display position and display size of the information to be displayed on the front windshield 9 in this embodiment can also meet the driver's need to distinguish between the "three-in-one" unified information and the actual scene in front of the vehicle when parking in poor lighting conditions. When performing personalized display for different drivers, the driver's ability to effectively distinguish the real scene in the driving field of view from the information to be displayed when reversing is used as a criterion to determine whether the driver is satisfied with the display position and display size of the information to be displayed on the front windshield 9, thereby improving parking safety and being applicable to various parking environments.

[0047] In some embodiments, the vehicle body camera includes two side cameras and a rear camera. The two side cameras are arranged on both sides of the vehicle body to collect road condition information around the vehicle, and the rear camera is used to collect road condition information behind the vehicle.

[0048] In some embodiments, the vehicle body domain controller is further used to:

[0049] The distance information between the vehicle and the surrounding objects provided by the parking radar is matched with the vehicle's preset vehicle distance display map, and the distance information between the vehicle and the surrounding objects is distinguished by color according to the color setting in the vehicle distance display map.

[0050] In some embodiments, the vehicle body domain controller is further used to:

[0051] The tire steering parameters collected by the tire steering angle sensor are obtained, and the tire steering parameters are imported into the vehicle driving trajectory block diagram which is pre-set according to the vehicle width with and without rearview mirrors when the vehicle leaves the factory, and the vehicle trajectory diagram under the current tire steering angle driving condition is calculated.

[0052] In some embodiments, the HUD head-up display system includes an image generation unit PGU1 and a projection optical component 2, wherein the projection optical component 2 includes a first curved mirror 3 and a second curved mirror 4, wherein:

[0053] The image generation unit PGU1 is used to receive the information to be displayed from the vehicle body domain controller, and transmit the information to be displayed to the first curved mirror 3 according to the first set optical path 5;

[0054] The first curved mirror 3 is used to receive information to be displayed and transmit the information to be displayed to the second curved mirror 4 according to the second set optical path 6;

[0055] The second curved mirror 4 is used to transmit the information to be displayed to the front windshield 9 according to the third set optical path 7, and the front windshield 9 displays the information to be displayed.

[0056] In some embodiments, the HUD head-up display system further includes a first transmission assembly 22 and a second transmission assembly, wherein:

[0057] The first transmission assembly 22 is used to drive the first curved mirror 3 to flip and move, adjust the first set optical path 5 and the second set optical path 6, and further adjust the imaging size and focal length of the first curved mirror 3 and the second curved mirror 4;

[0058] The second transmission assembly is used to drive the second curved mirror 4 to flip and move, adjust the second set optical path 6 and the third set optical path 7, and further adjust the imaging size and focal length of the second curved mirror 4 on the front windshield 9.

[0059] In some embodiments, when the HUD head-up display system adjusts the projection optical component 2 according to the adjustment information, the specific adjustment method is:

[0060] The first transmission assembly 22 is adjusted alone, the second transmission assembly is adjusted alone, or both the first transmission assembly 22 and the second transmission assembly are adjusted until the user is satisfied with the display position and size of the information to be displayed on the front windshield 9 .

[0061] In some embodiments, the HUD head-up display system further includes a base 18, an upper cover 19, a dustproof film 20 and a radiator 17, wherein:

[0062] The heat sink 17 is used to fix the image generating unit PGU1 and realize heat dissipation of the image generating unit PGU1;

[0063] The base 18 and the upper cover 19 are used to cooperate with each other to form a receiving space for receiving the image generating unit PGU1 , the projection optical assembly 2 , the first transmission assembly 22 , the second transmission assembly and the heat sink 17 .

[0064] In some embodiments, the vehicle body domain controller is further used to:

[0065] Performing facial recognition on the driver, and recording the adjustment information of the projection optical assembly 2 when the driver is satisfied with the display position and display size of the information to be displayed on the front windshield 9;

[0066] The adjustment information includes the adjustment position and angle information of the first transmission component 22 on the first curved mirror 3 , and / or the adjustment position and angle information of the second transmission component on the second curved mirror 4 .

[0067] Overall, if Figure 3As shown, an embodiment of the present invention proposes a vehicle-mounted head-up display device with 360-degree panoramic image and reversing image functions (i.e., the above-mentioned HUD head-up display system). When the driver is reversing the vehicle, the 360-degree panoramic image and the reversing image are projected by the vehicle-mounted head-up display device, and the real-time vehicle reversing trajectory, the driving distance to surrounding objects, and the road conditions around and behind the vehicle are imaged on the front windshield 9 directly in front of the driver, which solves the above-mentioned problem well.

[0068] The vehicle HUD accurate imaging system with 360-degree panoramic image and reversing image functions developed in this embodiment to address the above problems can automatically and in real time provide the driver with the reversing trajectory, driving distance prompts and road conditions around and behind the vehicle required by the driver when the vehicle is reversing, and provide the driver with the data of the vehicle reversing in a timely and accurate manner, and the driver can even manually select the vehicle head-up display device (HUD, such as Figure 3 ) is a real-time display of the quantified driving distance during driving, or the real-time data of dangerous, acceptable and safe driving distances represented by the three status colors of red, yellow and green when some vehicles are reversing, so as to improve the panic and timeliness of novice drivers and passengers when reversing and reduce the accident rate.

[0069] As an example, this implementation method in this embodiment can directly use the camera and parking radar of the vehicle's current parking assistance imaging system, the vehicle's head-up display device (HUD, such as Figure 3 ) and other existing functional modules in the vehicle. Adjust the vehicle function on the existing basis, send various real-time parameters detected by the parking assistance imaging system when the vehicle is reversing to the body domain controller, and then the body domain controller processes the information and sends it to the vehicle head-up display device (HUD, such as Figure 3 ) imaging system.

[0070] The real-time driving parameters of the vehicle in reverse are no longer displayed on the central control screen in the head unit, but on the head-up display device (HUD, such as Figure 3 ) is projected onto the optical parts and finally refracted onto the front windshield 9 facing the driver. The premise for the implementation of this embodiment is to modify the camera, parking radar, body domain controller, vehicle head-up display device (HUD, such as Figure 3 ) and the transmission path of the respective signals of the audio host and the central control screen. In addition, the vehicle head-up display device (HUD, such as Figure 3 ) and the memory capacity of the central control chip in the body domain controller is sufficient to increase the software requirements of this functional part.

[0071] See also Figures 1 to 3As shown, the technical solution of the embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings to make the above-mentioned objects and advantages easier to understand.

[0072] Figure 1 This is the logic control diagram of this embodiment. When the driver shifts the gear lever to the R gear, the system starts to work and enters the system initialization. The body domain controller first receives the R gear signal, and when it determines that the vehicle is about to enter the reverse driving condition, it releases an electric frequency signal to the camera and parking radar respectively;

[0073] The camera and parking radar receive the signal and start working. The camera starts to transmit the LVDS signal to the vehicle domain controller in real time. The vehicle domain controller decodes the LVDS signal to generate image information and transmits it to the vehicle head-up display device (HUD, such as Figure 3 );

[0074] The radar transmits the distance value signal to the body domain controller, which matches the factory preset distance display diagram (0-60mm is red, 60mm-90mm is orange-red, and above 90mm is green) according to the corresponding measured vehicle distance, and transmits the real-time vehicle distance warning image to the vehicle head-up display (HUD);

[0075] The tire angle sensor transmits the tire steering parameters to the body domain controller in real time. The body domain controller imports the tire steering angle parameters into the vehicle driving trajectory diagram that is pre-set according to the vehicle width with and without rearview mirrors when the vehicle leaves the factory, analyzes and calculates the vehicle trajectory diagram under the current tire steering angle, and transmits the real-time vehicle driving trajectory diagram to the vehicle head-up display device (HUD, such as Figure 3 );

[0076] Finally, the vehicle head-up display (HUD, such as Figure 3 ) is projected onto the front windshield 9 according to the image transmitted by the vehicle body domain control. See the schematic diagram Figure 2 .

[0077] It can be understood that:

[0078] 1. This embodiment Figure 1 In the reversing image function, when the safety distance is too short, an alarm sound will be issued. The alarm sound is issued through a speaker (buzzer). The speaker is set separately and connected to the vehicle head-up display device (HUD, such as Figure 3 ) There is no signal interaction between them;

[0079] 2. To meet the driver's habits, the information to be displayed by the HUD head-up display system of this embodiment can also be displayed on the large central control screen of the audio host or the instrument cluster. The driver can make a manual selection here.

[0080] Figure 2 This is a schematic diagram of optical imaging of a vehicle head-up display (HUD) in Example 1. Figure 3 This is an exploded diagram of the overall structure of the HUD head-up display system in Example 1. Please refer to Figure 2 and Figure 3 As shown, the specific structure of the HUD head-up display system in this embodiment is described in detail.

[0081] In general, the HUD head-up display system includes a base 18, an upper cover 19, a dustproof film 20, a heat sink 17, an image generation unit PGU1, a projection optical component 2, a first transmission component 22, a second transmission component, a component cover 23, and a PCB component 21. The projection optical component 2 also includes a first curved mirror 3 and a second curved mirror 4. Among them:

[0082] The base 18 and the upper cover 19 are used to cooperate with each other to form a receiving space to receive components such as the image generation unit PGU1, the projection optical assembly 2, the first transmission assembly 22, the second transmission assembly (not shown in the figure) and the heat sink 17; wherein the base 18 is located at the bottom, and the upper cover 19 is located at the top, the base 18 is used to fix various internal components, and the upper cover 19 is provided with a dustproof film 20 for dustproof, waterproof and shielding internal parts;

[0083] The heat sink 17 is used to fix the image generating unit PGU1 and realize heat dissipation of the image generating unit PGU1;

[0084] The image generation unit PGU1 is used to receive the information to be displayed from the vehicle body domain controller, and transmit the information to be displayed to the first curved mirror 3 according to the first set optical path 5;

[0085] The first curved mirror 3 is used to receive information to be displayed and transmit the information to be displayed to the second curved mirror 4 according to the second set optical path 6;

[0086] The second curved mirror 4 is used to transmit the information to be displayed to the front windshield 9 according to the third set optical path 7, and the front windshield 9 displays the information to be displayed;

[0087] The first transmission assembly 22 is used to drive the first curved mirror 3 to flip and move, adjust the first set optical path 5 and the second set optical path 6, and further adjust the imaging size and focal length of the first curved mirror 3 and the second curved mirror 4;

[0088] The second transmission assembly is used to drive the second curved mirror 4 to flip and move, adjust the second set optical path 6 and the third set optical path 7, and then adjust the image size and focal length of the second curved mirror 4 on the front windshield 9;

[0089] The PCB assembly 21 is used for circuit control implementation;

[0090] The component cover 23 is used to fix the transmission component, the PCB component 21 and the heat sink 17.

[0091] It can be understood that the first transmission assembly 22 and the second transmission assembly are used to realize the flipping and movement of the curved mirror, and finally realize the adjustment of the imaging height and the imaging size on the front windshield 9 .

[0092] In order to meet the driver's need to distinguish between the "three-in-one" unified information and the actual scene in front of the vehicle when parking in poor lighting conditions, the present technical solution implements personalized presentation, display and adjustment of the image size and position on the front windshield 9 for different drivers. When performing personalized display for different drivers, the driver's ability to effectively distinguish between the real scene in the driving field of view and the information to be displayed when reversing is used as a criterion to determine whether the driver is satisfied with the display position and size of the information to be displayed on the front windshield 9, thereby improving parking safety and being applicable to a variety of parking environments.

[0093] When the HUD head-up display system adjusts the projection optical component 2 according to the adjustment information, the specific adjustment method is:

[0094] The first transmission assembly 22 is adjusted alone, the second transmission assembly is adjusted alone, or both the first transmission assembly 22 and the second transmission assembly are adjusted until the user is satisfied with the display position and size of the information to be displayed on the front windshield 9 .

[0095] It can be understood that:

[0096] When the first transmission assembly 22 is adjusted separately, the first transmission assembly 22 drives the first curved mirror 3 to flip and move, adjusts the first set optical path 5 and the second set optical path 6, and then adjusts the imaging size and focal length of the first curved mirror 3 and the second curved mirror 4, and finally realizes the adjustment of the imaging size and position of the information to be displayed on the front windshield 9;

[0097] When the second transmission assembly is adjusted separately, the second transmission assembly drives the second curved mirror 4 to flip and move, and adjusts the second set optical path 6 and the third set optical path 7, and finally realizes the adjustment of the imaging size and position of the information to be displayed on the front windshield 9;

[0098] When both the first transmission assembly 22 and the second transmission assembly are adjusted, the adjustment effects of adjusting the first transmission assembly 22 alone and adjusting the second transmission assembly alone are superimposed.

[0099] Figure 2The relative positions of the vehicle hood 10, the driver's seat in the cab, the driver, the front windshield, and the image generation unit PGU1 and the projection optical assembly 2 of the HUD head-up display system in this embodiment are shown in FIG. Figure 2 In the embodiment, the second curved mirror 4 is arranged behind the first curved mirror 3, that is, the second curved mirror 4 is arranged closer to the front windshield 9, and the image generation unit PGU1 is arranged below the first curved mirror 3:

[0100] After the image generation unit PGU1 receives the information to be displayed from the vehicle body domain controller, the information to be displayed is transmitted to the first curved mirror 3 according to the first set optical path 5;

[0101] Afterwards, the first curved mirror 3 receives the information to be displayed, and transmits the information to be displayed to the second curved mirror 4 according to the second set optical path 6;

[0102] Then, the second curved mirror 4 transmits the information to be displayed to the front windshield 9 according to the third set optical path 7, and the front windshield 9 displays the information to be displayed;

[0103] The front windshield 9 reflects the light beam along the fourth set light path 8 to the human eye, and the driver will see the virtual image 11 of the information to be displayed on the front windshield 9. Since light propagates in a straight line in the human eye, the virtual image 11 seen by the driver is on the reverse extension line of the fourth set light path 8 reflected by the front windshield 9 to the driver.

[0104] Figure 2 Also shown in the figure is a field of view angle 13 and a lower viewing angle 14, namely, an image distance 12. The image distance 12 is the distance between the virtual image 11 and the driver's eye box 15.

[0105] It can be understood that in this embodiment, eye elipse16 means the eye movement range (±50mm), and the complete HUD image can be seen within the eye box movement range; eye box15 means the eye box size, and the complete HUD image can be seen within the eye box range (130mm×50mm).

[0106] The specific implementation process of the technical solution of this embodiment is as follows:

[0107] When the driver shifts the gear to the reverse gear (R gear), the body domain controller receives the reverse gear signal and releases the corresponding command:

[0108] ① The body camera receives the activation signal from the body domain controller, and the cameras on both sides of the body and the rear camera start working after receiving the corresponding electrical frequency signal, transmitting the road conditions around the vehicle and behind the vehicle in real time;

[0109] ②At the same time, the parking radar also receives the activation signal from the vehicle domain controller, and the parking radar starts working and begins to measure the distance between the vehicle and surrounding objects;

[0110] ③ As the steering wheel is constantly corrected during vehicle driving, the tire steering angle sensor starts working, recording the tire steering parameters and transmitting them to the body domain controller. The body domain controller calculates the vehicle's trajectory map under the current steering angle.

[0111] As several systems of the vehicle body work and multiple systems transmit signals to each other, the vehicle body domain controller receives information from:

[0112] ① The electrical signals (LVDS signals) transmitted in real time by the cameras on both sides of the vehicle body and the rear camera are re-encoded into video information (real-time road conditions when the vehicle is reversing) by the deserializer;

[0113] ② Import the (tire) steering angle parameters transmitted by the tire steering gear into the vehicle driving trajectory diagram that is pre-set according to the vehicle width with and without rearview mirrors when the vehicle leaves the factory, and analyze and calculate the vehicle trajectory diagram under the current tire steering angle driving condition;

[0114] ③ After receiving the distance value signal fed back from the parking radar, the body domain controller matches the factory preset vehicle distance display diagram (0-60mm is red, 60mm-90mm is orange-red, and 90mm and above is green) according to the corresponding measured vehicle distance; the body domain controller adds the real-time road condition information captured by the camera to the vehicle driving trajectory diagram analyzed by combining the tire steering parameters and the distance warning diagram analyzed by the real-time distance between the actual vehicle and the surrounding objects fed back by the parking radar, and sends the "three-in-one" information as a whole to the vehicle head-up display device (HUD, such as Figure 3 ) is finally projected onto the front windshield directly in front of the driver (reference Figure 1 ).

[0115] It can be understood that the technical solution of this embodiment needs to meet the following conditions:

[0116] 1. A vehicle domain controller and a head-up display device (HUD, such as Figure 3 )’s central control chip has sufficient memory;

[0117] 2. Further stringent requirements on data computing and analysis capabilities of vehicle chips;

[0118] 3. For vehicle head-up display devices (HUD, such as Figure 3 )’s image generation unit (PGU) and the corresponding projection optical part have higher imaging performance requirements;

[0119] 4. The vehicle head-up display device (HUD, such as Figure 3 ) The projection angle can ensure that the driver's vision in front of the vehicle is not blocked or affected, while also taking into account the clarity and functionality of the reversing image and 360-degree panoramic image;

[0120] 5. If there are many common functions that need to be automatically prompted, the signal list of the associated module to send the signal needs to be changed. If the corresponding module is not connected to the network, it is necessary to add a signal connection, which makes the change slightly more complicated;

[0121] 6. A display scheme for reversing images and 360-degree panoramic images on the central control screen of the audio host should be reserved. If you want to adjust the display of reversing images and 360-degree panoramic images (change from HUD projection display to central control screen display), you can select the setting in the instrument or central control screen.

[0122] Embodiment 2

[0123] This embodiment discloses a method for accurate imaging of a vehicle HUD.

[0124] The vehicle HUD accurate imaging method comprises the following steps:

[0125] After receiving the reverse gear signal, the body domain controller collects the road condition information around and behind the vehicle provided by the body camera, collects the distance information between the vehicle and surrounding objects provided by the parking radar, and calculates the trajectory of the vehicle under the current steering angle, and sends the above information to be displayed as a whole to the HUD head-up display system;

[0126] The HUD head-up display system receives information to be displayed, including road conditions around and behind the vehicle, distance information between the vehicle and surrounding objects, and a vehicle trajectory map, and displays the information to be displayed on the front windshield using a projection optical component;

[0127] After the information to be displayed is displayed on the front windshield, the HUD head-up display system obtains the user's adjustment information on the display position and display size of the information to be displayed on the front windshield, and adjusts the projection optical component according to the adjustment information until the user is satisfied with the display position and display size of the information to be displayed on the front windshield.

[0128] Those skilled in the art should understand that the modules or steps of the present invention described above can be implemented by a general-purpose computer device, or alternatively, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. The present invention is not limited to any specific combination of hardware and software.

[0129] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. Vehicle HUD accurate imaging system, characterized by: It includes HUD head-up display system, body domain controller, body camera and parking radar, including: The body domain controller is used to collect the road condition information around and behind the vehicle provided by the body camera, collect the distance information between the vehicle and surrounding objects provided by the parking radar, calculate the trajectory diagram of the vehicle under the current steering angle, and send the above information to be displayed as a whole to the HUD head-up display system after obtaining the reverse gear signal; The HUD head-up display system is used to receive information to be displayed, including road condition information around and behind the vehicle, distance information between the vehicle and surrounding objects, and a vehicle trajectory map, and display the information to be displayed on the front windshield using a projection optical component; It is also used to obtain the user's adjustment information on the display position and display size of the information to be displayed on the front windshield, and adjust the projection optical component according to the adjustment information until the user is satisfied with the display position and display size of the information to be displayed on the front windshield.

2. The vehicle HUD accurate imaging system according to claim 1, characterized in that: The vehicle body camera includes two side cameras and a rear camera. The two side cameras are arranged on both sides of the vehicle body to collect road condition information around the vehicle, and the rear camera is used to collect road condition information behind the vehicle.

3. The vehicle HUD accurate imaging system according to claim 1, characterized in that: The body domain controller is also used for: The distance information between the vehicle and the surrounding objects provided by the parking radar is matched with the vehicle's preset vehicle distance display map, and the distance information between the vehicle and the surrounding objects is distinguished by color according to the color setting in the vehicle distance display map.

4. The vehicle HUD accurate imaging system as claimed in claim 1, characterized in that: The body domain controller is also used for: The tire steering parameters collected by the tire steering angle sensor are obtained, and the tire steering parameters are imported into the vehicle driving trajectory block diagram which is pre-set according to the vehicle width with and without rearview mirrors when the vehicle leaves the factory, and the vehicle trajectory diagram under the current tire steering angle driving condition is calculated.

5. The vehicle HUD accurate imaging system as claimed in claim 1, characterized in that: The HUD head-up display system includes an image generation unit PGU and a projection optical component, wherein the projection optical component includes a first curved mirror and a second curved mirror, wherein: The image generation unit PGU is used to receive the information to be displayed from the vehicle body domain controller, and transmit the information to be displayed to the first curved mirror according to the first set optical path; The first curved mirror is used to receive information to be displayed and transmit the information to be displayed to the second curved mirror according to the second set optical path; The second curved mirror is used to transmit the information to be displayed to the front windshield according to the third set optical path, and the front windshield displays the information to be displayed.

6. The vehicle HUD accurate imaging system as claimed in claim 5, characterized in that: The HUD head-up display system further includes a first transmission assembly and a second transmission assembly, wherein: The first transmission assembly is used to drive the first curved mirror to flip, adjust the first set light path and the second set light path, and then adjust the imaging size and focal length of the first curved mirror and the second curved mirror; The second transmission assembly is used to drive the second curved mirror to flip, adjust the second set light path and the third set light path, and then adjust the image size and focal length of the second curved mirror on the front windshield.

7. The vehicle HUD accurate imaging system as claimed in claim 6, characterized in that: When the HUD head-up display system adjusts the projection optical component according to the adjustment information, the specific adjustment method is as follows: The first transmission assembly is adjusted alone, the second transmission assembly is adjusted alone, or both the first transmission assembly and the second transmission assembly are adjusted until the user is satisfied with the display position and display size of the information to be displayed on the front windshield.

8. The vehicle HUD accurate imaging system as claimed in claim 6, characterized in that: The HUD head-up display system further includes a base, an upper cover, a dustproof film and a radiator, wherein: The heat sink is used to fix the image generating unit PGU and realize heat dissipation of the image generating unit PGU; The base and the upper cover are used to cooperate with each other to form a receiving space for receiving the image generating unit PGU, the projection optical component, the first transmission component, the second transmission component and the heat sink.

9. The vehicle HUD accurate imaging system as claimed in claim 7, characterized in that: The body domain controller is also used for: Performing facial recognition on the driver, and recording adjustment information of the projection optical component when the driver is satisfied with the display position and display size of the information to be displayed on the front windshield; The adjustment information includes the adjustment position and angle information of the first transmission component on the first curved mirror, and / or the adjustment position and angle information of the second transmission component on the second curved mirror.

10. A vehicle HUD accurate imaging method, characterized in that: The following steps are involved: After receiving the reverse gear signal, the body domain controller collects the road condition information around and behind the vehicle provided by the body camera, collects the distance information between the vehicle and surrounding objects provided by the parking radar, and calculates the trajectory of the vehicle under the current steering angle, and sends the above information to be displayed as a whole to the HUD head-up display system; The HUD head-up display system receives information to be displayed, including road conditions around and behind the vehicle, distance information between the vehicle and surrounding objects, and a vehicle trajectory map, and displays the information to be displayed on the front windshield using a projection optical component; After the information to be displayed is displayed on the front windshield, the HUD head-up display system obtains the user's adjustment information on the display position and display size of the information to be displayed on the front windshield, and adjusts the projection optical component according to the adjustment information until the user is satisfied with the display position and display size of the information to be displayed on the front windshield.

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