Dynamic curve light blanket projection method and device, vehicle and computer readable storage medium

Abstract

The invention provides a dynamic curve light blanket projection method and device, a vehicle and a computer readable storage medium, and the method comprises the steps: obtaining a corresponding picture according to the angle information of a steering wheel of the vehicle obtained every preset time when a curve light blanket projection condition is satisfied, converting the picture into Micro Led particle pixels, and projecting the Micro Led particle pixels to a road surface in front of the vehicle, according to the technical scheme, the dynamic curve light blanket is formed, the angle information of the steering wheel is different, and the pictures forming the curve light blanket are different, so that when the vehicle changes the lane, the corresponding curve light blanket can be formed, the pictures are converted into Micro Led particle pixels to be projected to the road surface in front of the vehicle, million-level pixels in the prior art can be reduced to ten thousand-level pixels, and the cost can be greatly reduced.

Description

Technical Field

[0001] The present invention relates to the field of vehicle electronic information technology, and particularly to a dynamic curved light carpet projection method, device, vehicle, and computer-readable storage medium. Background Art

[0002] Currently, the automotive headlamp industry has seen the rise of the Digital Light Processing (DLP) system. This DLP uses a Digital Micromirror Device (DMD) to reflect light to generate an image for the headlamp projection system, which projects symbols, straight vehicle width light carpets, and variable light carpets on the road surface in front of the vehicle during driving. For example, when the vehicle triggers a lane change, it projects a variable light carpet to remind the drivers of the vehicles coming from the left and right rear that the vehicle is about to change lanes, and the planned lane change path is represented by the "variable light carpet" projected onto the road surface.

[0003] The current DLP optoelectronic principle is to use a Digital Micromirror Device (DMD) to reflect light to generate an image. The core is to arrange millions of tiny reflecting lenses on a chip, and each lens can independently control the direction of the reflected light. When light passes through these lenses, it is reflected to the correct position to form an image on the screen. In the prior art, such "variable light carpet" DLP systems are all matrix light-emitting diodes (LEDs) with millions of pixels, and thus require a microprocessor (MPU) with relatively high computing power for control, resulting in high costs.

[0004] Therefore, how to generate a low-cost curved light carpet is an urgent problem to be solved currently. Summary of the Invention

[0005] In view of this, the embodiments of the present invention are committed to providing a dynamic curved light carpet projection method, device, vehicle, and computer-readable storage medium. By dynamically selecting the projected picture according to the steering wheel angle information and performing curved light carpet projection based on Micro Led particle pixels, a dynamic curved light carpet can be formed, realizing low-cost curved light carpet projection.

[0006] To achieve the above technical objectives, the embodiments of the present specification provide the following technical solutions:

[0007] In a first aspect, an embodiment of the present application provides a dynamic curved light carpet projection method, which is applied to a vehicle controller. The dynamic curved light carpet projection method includes: if it is detected that the curved light carpet projection condition is satisfied, obtaining the steering wheel angle information of the vehicle at preset intervals; obtaining a picture ID according to the steering wheel angle information, and obtaining a picture from a pre-stored image database according to the picture ID in combination with the steering wheel angle information; converting the picture into Micro Led particle pixels and projecting them onto the road surface in front of the vehicle to form a dynamic curved light carpet.

[0008] Optionally, the steering wheel angle information includes the steering wheel rotation angle; before obtaining the picture ID according to the steering wheel angle information, it includes: determining the steering angle of the tire according to the steering wheel rotation angle; determining whether a picture needs to be replaced according to the steering angle; if a picture needs to be replaced, then execute the step of obtaining the picture ID according to the steering wheel rotation angle.

[0009] Optionally, determining the steering angle of the tire according to the steering wheel rotation angle includes: subtracting the steering wheel rotation angle from a preset trigger threshold value to obtain a to-be-projected rotation angle; determining the steering angle of the tire according to the to-be-projected rotation angle and a preset angle correspondence relationship, where the angle correspondence relationship is used to indicate the correspondence relationship between the steering wheel rotation angle and the steering angle.

[0010] Optionally, determining whether a picture needs to be replaced according to the steering angle includes: comparing the steering angle with a preset angle; if the steering angle is greater than or equal to the preset angle, determining that a picture needs to be replaced; if the steering angle is less than the preset angle, determining that a picture does not need to be replaced.

[0011] Optionally, obtaining the picture ID according to the steering wheel angle information includes: determining a to-be-projected rotation angle according to the steering wheel rotation angle, where the to-be-projected rotation angle is equal to the difference between the steering wheel rotation angle and a preset trigger threshold value; calculating the ratio of the to-be-projected rotation angle to a preset ratio to obtain the picture ID, where the preset ratio is related to the number of images stored in the image database and the change range of the to-be-projected rotation angle.

[0012] Optionally, the steering wheel angle information further includes a deflection direction; obtaining a picture from a pre-stored image database according to the picture ID includes: if the deflection direction indicates 0 deflection, extracting the 0-degree picture in the image database; otherwise, selecting a picture library in the pre-stored image database according to the deflection direction, and extracting a picture corresponding to the picture ID from the picture library.

[0013] Optionally, the image database includes a left light carpet projection picture library, the 0-degree picture, and a right light carpet projection picture library; determining the picture library in the pre-stored image database according to the deflection direction includes: if the deflection direction is left deflection, selecting the left light carpet projection picture library; if the deflection direction is right deflection, selecting the left light carpet projection picture library.

[0014] Optionally, before detecting that the condition for curved light carpet projection is satisfied and acquiring the steering wheel angle information of the vehicle at preset intervals, it includes: detecting whether the condition for curved light carpet projection is satisfied, specifically including: acquiring the vehicle speed and the state of the light carpet switch; if the light carpet switch is in the on state and the vehicle speed is greater than the reference speed, it is determined that the condition for curved light carpet projection is satisfied; otherwise, it is determined that the condition for curved light carpet projection is not satisfied.

[0015] In a second aspect, an embodiment of the present application further provides a dynamic curved light carpet projection device, which is applied to a vehicle controller. The device includes: an information acquisition module, configured to acquire the steering wheel angle information of the vehicle at preset intervals if it is detected that the condition for curved light carpet projection is satisfied; a picture acquisition module, configured to acquire a picture ID according to the steering wheel angle information, and acquire a picture from a pre-stored image database according to the picture ID in combination with the steering wheel angle information; a light carpet formation module, configured to convert the picture into Micro Led particle pixels and project them onto the road surface in front of the vehicle to form a dynamic curved light carpet.

[0016] In a second aspect, an embodiment of the present application further provides a vehicle, including: a memory, configured to store executable program code; a processor, configured to call and run the executable program code from the memory, so that the vehicle executes the foregoing method.

[0017] In a third aspect, an embodiment of the present specification further provides a computer-readable storage medium, which implements the foregoing method when the computer program is executed.

[0018] It can be seen from the above technical solutions that the dynamic curved light carpet projection method provided by the embodiments of the present specification acquires corresponding pictures according to the steering wheel angle information of the vehicle acquired at preset intervals when the condition for curved light carpet projection is satisfied, converts the pictures into Micro Led particle pixels and projects them onto the road surface in front of the vehicle to form a dynamic curved light carpet. Different steering wheel angle information results in different pictures for forming the curved light carpet, so that when the vehicle changes lanes, a corresponding curved light carpet can be formed. And converting the pictures into Micro Led particle pixels and projecting them onto the road surface in front of the vehicle can reduce the million-level pixels in the prior art to the ten-thousand-level pixels, which can greatly reduce the cost.

[0019] The above description is only an overview of the technical solution of the present disclosure. In order to be able to understand the technical means of the present disclosure more clearly, it can be implemented in accordance with the content of the specification. And in order to make the above and other purposes, features and advantages of the present disclosure more obvious and understandable, the following specific embodiments of the present disclosure are specifically exemplified. Brief Description of the Drawings

[0020] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present disclosure. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0021] Figure 1 Shows a schematic diagram of a system framework provided by an embodiment of the present application;

[0022] Figure 2 Shows a schematic flow diagram of a dynamic curved light carpet projection method provided by an embodiment of the present application;

[0023] Figure 3 Shows an example diagram of the projection effect of a dynamic curved light carpet provided by an embodiment of the present application;

[0024] Figure 4 Shows an example diagram of the effect of a dynamic curved light carpet projection method provided by an embodiment of the present application;

[0025] Figure 5 Shows a schematic structural diagram of a dynamic curved light carpet projection device provided by an embodiment of the present application;

[0026] Figure 6 Shows a schematic structural diagram of a vehicle provided by an embodiment of the present application. Detailed Description of the Embodiments

[0027] Unless otherwise defined, the technical terms or scientific terms used in the embodiments of this specification should have the ordinary meaning understood by those of ordinary skill in the art to which this specification belongs. The "first", "second" and similar terms used in the embodiments of this specification do not represent any order, quantity or importance, but are only used to avoid confusion of components.

[0028] Unless otherwise required by the context, throughout the specification, "a plurality of" means "at least two", and "comprising" is interpreted in an open, inclusive sense, that is, "including, but not limited to". In the description of the specification, terms such as "an embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples", or "some examples" are intended to indicate that specific features, structures, materials, or characteristics related to the embodiment or example are included in at least one embodiment or example of this specification. The schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0029] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0030] The variable light carpet refers to the light projected by the intelligent vehicle lamp when the vehicle changes lanes, which is used to remind the driver to change lanes in time and inform other surrounding vehicles to pay attention to the lane-changing action. Specifically, the intelligent vehicle lamp technology projects a light carpet with the same width as the vehicle when the vehicle changes lanes to improve driving safety at night or under low-light conditions. The emergence of the variable light carpet can not only help the driver better judge the lane boundary, but also remind surrounding vehicles to pay attention to avoidance, thus reducing traffic accidents caused by lane changes. In addition, the variable light carpets of some high-end models also have a dynamic adjustment function, which can adjust the length and brightness of the variable light carpet in real time according to the actual position and speed of the vehicle to adapt to different driving environments and conditions.

[0031] The straight-ahead vehicle-width light carpet and variable light carpet in the prior art are based on the digital light processing system DLP technology, and a digital micromirror device (DMD) is used to reflect light to generate an image, and then form a light carpet. Millions of tiny reflective mirrors are arranged in the digital micromirror device (DMD). By independently controlling the direction of the light reflected by each reverse mirror, each light is reflected to the correct position to form an image. Considering that millions of tiny reflective mirrors need to be independently controlled, a microprocessor with high computing power is required for control, resulting in high costs.

[0032] In addition, the digital light processing system DLP is an RGB three-color light reflection system, which does not conform to the relevant regulations of vehicle headlamps when projecting the headlamp. Therefore, only white light can be used at the cost of supporting RGB three colors in hardware, resulting in cost waste.

[0033] Micro Light Emitting Diode (Micro-Led) is a Light Emitting Diode (LED) that uses miniaturization and matrix technology. The Micro-Led array connects the positive and negative electrodes of each Micro-Led via vertically interleaved positive and negative grid electrodes. By sequentially energizing the electrode lines, the Micro-Leds are illuminated in a scanning manner to display an image. Each LED can emit light independently, offering advantages such as high brightness, high contrast, and fast response time.

[0034] Based on this, the present application provides a system framework, as Figure 1 shown. The system mainly includes a projection module and an electronic controller. The electronic controller is connected to the vehicle battery through a power cord and is used to receive a 12V power signal. The electronic controller provides a 5V power supply to the projection module. The electronic controller also receives signals such as the light carpet activation condition, current vehicle speed, and steering wheel angle through the Controller Area Network (CAN). The electronic controller includes a Micro Controller Unit (MCU) and a memory. The Micro Controller Unit MCU is used to write software programs to perform logical judgments based on the CAN signal input and then control the output and implement the function of the curved light carpet. There are also voltage regulators, resistors, capacitors, etc. set on the electronic controller, which will not be elaborated here. The memory is preferably a Flash memory chip, in which an image database is set to pre-store all the pictures required for generating the curved light carpet.

[0035] The electronic controller detects whether the curved light carpet projection condition is met according to the received signals such as the curved light carpet activation condition, current vehicle speed, and steering wheel angle, obtains the steering wheel angle information of the vehicle at preset intervals, then obtains the picture ID according to the steering wheel angle information, and obtains the picture from the pre-stored image database according to the picture ID combined with the steering wheel angle information. The electronic controller transmits the picture to the projection module. The picture is preferably an RGB8 bitmap picture.

[0036] The projection module includes a voltage regulator, a projection controller, and Micro-Leds with ten thousand pixels. The projection module receives the 5V power supply voltage from the electronic controller and supplies power to the Micro-Leds through the voltage regulator. The projection controller converts the picture transmitted by the electronic controller into Micro-Led particle pixels, and projects the picture onto the road surface in front of the vehicle through the Micro-Leds to form a dynamic curved light carpet. The projection controller can use an Application Specific Integrated Circuit (ASIC), or directly apply a processor or an integrated circuit component. Thus, by using Micro-Leds with ten thousand pixels, a dynamic curved light carpet can be realized, that is, a high-definition vehicle headlight projection dynamic curved light carpet can be realized with the simplest and low-cost electronic hardware and software solutions.

[0037] Based on the above system, to solve the technical problem of the high cost of realizing a curved light carpet in the prior art, this application provides a dynamic curved light carpet projection method, as Figure 2 shown Figure 2 is a schematic flowchart of a dynamic curved light carpet projection method provided by an embodiment of this application. The dynamic curved light carpet projection method can be applied to an electronic controller. The dynamic curved light carpet projection method includes:

[0038] Step S11: If it is detected that the curved light carpet projection condition is met, obtain the steering wheel angle information of the vehicle at preset intervals.

[0039] The curved light carpet projection condition is used to indicate the vehicle driving conditions that require curved light carpet projection. When the vehicle is driving on a road surface with good lighting conditions, or the vehicle is not in a driving state, there is no need to project a curved light carpet. The curved light carpet projection conditions include that the vehicle is in an environment with poor lighting conditions and the vehicle is in a driving state. For example, the vehicle is driving at night, or the vehicle is driving in a tunnel or culvert with poor lighting conditions, etc.

[0040] The steering wheel angle information can be detected by applying a steering wheel angle sensor, or it can also be directly receiving the signal transmitted by the vehicle steering system to obtain the steering wheel angle information. The preset time can be set according to needs or experience, but the preset time cannot be set too short or too long. If the preset time is set too short, it will cause unnecessary frequent picture replacement, wasting resources and possibly dazzling the user, increasing driving risks and reducing the user's driving experience. And if the preset time is set too long, it may cause the road conditions in front of the vehicle to be not correctly displayed, and may even mislead the driver, which will also increase driving risks and reduce the user's driving experience. The preset time is preferably 50ms. Of course, in other embodiments of this application, it can also be set to other values, and no specific limitation is made here.

[0041] Step S12: Obtain a picture ID according to the steering wheel angle information, and obtain a picture from the pre-stored image database in combination with the steering wheel angle information based on the picture ID.

[0042] The image database set in the electronic controller stores multiple pictures for projecting the curved light carpet, and each picture corresponds to a picture ID. Each picture ID corresponds one-to-one with the steering wheel angle information, and different steering wheel angle information corresponds to different pictures. The number of pictures stored in the image database is related to the steering angle range to be projected and the projection interval angle in the steering wheel angle information. The larger the steering angle range to be projected or the smaller the projection interval angle, the more pictures are stored in the image database. The smaller the steering angle range to be projected or the larger the projection interval angle, the fewer pictures are stored in the image database.

[0043] In some embodiments of the present application, after obtaining the steering wheel angle information, obtain the picture ID based on the preset correspondence between the steering wheel angle information and the picture ID, and then extract the picture corresponding to the picture ID from the image database according to the picture ID.

[0044] Step S13: Convert the picture into Micro Led particle pixels and project them onto the front road surface of the vehicle to form a dynamic curved light carpet.

[0045] The picture extracted from the image database corresponding to the steering wheel angle information is an RGB8 bitmap picture. The RGB8 bitmap uses 8-bit grayscale, which is between black, gray, and white, and has 256 levels. That is, each channel is represented by a value between 0 and 255 to represent its change. Thus, in the present application, a Micro-Led with ten-thousand-level pixels can be used to achieve the projection of the picture. After extracting the picture, convert the picture into ten-thousand-level Micro Led particle pixels and project them onto the front road surface of the vehicle to form a curved light carpet. If the vehicle is driving on a curved road, the steering wheel needs to be turned, and the picture for forming the curved light carpet is changed every preset time, and different steering wheel angle information corresponds to different curved light carpets. In this way, a dynamic curved light carpet can be formed.

[0046] When the dynamic curved light carpet projection method of the present application meets the curved light carpet projection conditions, obtain the corresponding picture according to the steering wheel angle information of the vehicle obtained every preset time, convert the picture into Micro Led particle pixels and project them onto the front road surface of the vehicle to form a dynamic curved light carpet. Different steering wheel angle information results in different pictures for forming the curved light carpet, so that when the vehicle changes lanes, the corresponding curved light carpet can be formed. And converting the picture into MicroLed particle pixels and projecting them onto the front road surface of the vehicle can reduce the million-level pixels in the prior art to ten-thousand-level pixels, which can greatly reduce the cost.

[0047] To more clearly illustrate the technical solution provided by the embodiments of the present application, the following further describes a dynamic curved light carpet projection method provided by the present application.

[0048] Considering that when the lighting conditions are good or the vehicle is not in a driving state, it is not necessary to generate a curved light carpet. Based on this, before step S11, it is detected whether the curved light carpet projection condition is satisfied, which specifically includes: obtaining the vehicle speed and the state of the light carpet activation switch; if the light carpet activation switch is in the on state and the vehicle speed is greater than the reference speed, it is determined that the curved light carpet projection condition is satisfied; otherwise, it is determined that the curved light carpet projection condition is not satisfied.

[0049] The light carpet activation switch can be triggered by an induction sensor or by other triggering mechanisms, such as manual triggering. For example, when the induction sensor detects that the surrounding ambient light is relatively weak, the light carpet activation switch is automatically triggered. Or when the driver feels that the environmental conditions are not good, or when the driver wants to activate the light carpet function, the light carpet activation switch receives the trigger signal input by the driver and responds to this trigger signal to activate the light carpet activation switch. After the light carpet activation switch is triggered, it is in the on state. At the same time, the vehicle speed is also obtained, and it is determined whether the curved light carpet projection condition is satisfied according to the vehicle speed and the state of the light carpet activation switch. If the light carpet activation switch is in the on state and the vehicle speed is greater than the reference speed, it is determined that the curved light carpet projection condition is satisfied; otherwise, it is not satisfied. The reference speed can be set according to needs and experience, and is preferably 3 km / h. By restricting the curved light carpet projection to be performed only when the curved light carpet projection condition is satisfied, resources can be saved, and costs can be reduced.

[0050] Considering that when the steering wheel angle is relatively small, it is not necessary to replace the picture forming the curved light carpet. In some embodiments of the present application, the steering wheel angle information includes the steering wheel rotation angle, and the steering angle of the tire is determined according to the steering wheel rotation angle; it is determined whether it is necessary to replace the picture according to the steering angle; if it is necessary to replace the picture, the step of obtaining the picture ID according to the steering wheel rotation angle is performed. If the steering angle of the tire is relatively small, even if the picture ID finally obtained according to the steering wheel rotation angle will be the picture corresponding to the same picture ID, that is, the same picture, it is not necessary to replace the picture at this time. By determining whether it is necessary to replace the picture according to the steering angle of the tire before obtaining the picture ID according to the steering wheel rotation angle, the step of obtaining the picture ID according to the steering wheel rotation angle can be omitted when it is not necessary to replace the picture, simplifying the process of generating the curved light carpet, saving resources, increasing the lifespan of related devices, and thus reducing costs.

[0051] In some embodiments of the present application, in order to accurately obtain the steering angle of the tire based on the steering wheel angle, the difference between the steering wheel angle and a trigger threshold value is calculated to obtain a to-be-projected angle; the steering angle of the tire is determined according to the corresponding relationship between the to-be-projected angle and a preset angle, wherein the corresponding relationship is used to indicate the corresponding relationship between the steering wheel angle and the steering angle.

[0052] When the range of the steering wheel angle is small during the vehicle driving, the vehicle is approximately going straight and there is no need to project the bend light carpet. Therefore, a trigger threshold value for the bend light carpet projection is set, and the bend light carpet projection is required only when the steering wheel angle is greater than the trigger threshold value. When obtaining the steering angle of the tire, the difference between the steering wheel angle and the trigger threshold value is calculated to obtain a to-be-projected angle. Then, the steering angle of the tire is calculated based on a preset relationship according to the to-be-projected angle. The to-be-projected angle and the steering angle of the tire are in a direct proportion relationship. The specific proportional coefficient can be set as required and is not limited herein. For example, for a certain vehicle, the maximum left and right rotation angles of the steering wheel are 780 degrees. The trigger threshold value of the steering wheel angle can be designed as 60 degrees, and the remaining is 61 - 780 = 720 degrees; the corresponding relationship between the steering wheel angle and the steering angle of the tire is 16:1. The steering angle of the tire = steering wheel angle / 16. Thus, the available steering angles of the bend projection light carpet are 45 degrees for both left and right, that is, 720 / 16 = 45. By setting the trigger threshold value, the bend light carpet projection is performed only when there is an obvious turning effect during the vehicle driving, reducing unnecessary resource waste and saving costs. By calculating the steering angle according to the corresponding relationship between the steering wheel angle and the steering angle of the tire, it is convenient to accurately obtain the picture ID and perform the bend projection subsequently, improving the accuracy of the bend projection.

[0053] In some embodiments of the present application, in order to accurately determine whether a picture needs to be replaced according to the steering angle of the tire, the steering angle is compared with a preset angle; if the steering angle is greater than or equal to the preset angle, it is determined that a picture needs to be replaced; if the steering angle is less than the preset angle, it is determined that a picture does not need to be replaced. It should be noted that when comparing the steering angle with the preset angle, only the magnitude of the steering angle can be compared with the preset angle, without considering the direction of the steering angle. If the steering angle is less than the preset angle, it indicates that the tire steering is very slight and a picture does not need to be replaced. If the steering angle is greater than or equal to the preset angle, it indicates that the road ahead is curved and a picture needs to be replaced, so that the bend light carpet can accurately prompt the driver of the road conditions ahead and improve the driving experience. The preset angle can be set and adjusted according to needs and experience and is not specifically limited. For example, the preset angle can be determined according to the change value of the steering degree of the tire within a preset time when the driver turns the steering wheel, and is preferably 0.15 degrees.

[0054] In some embodiments of the present application, it is also possible to directly determine whether to replace the picture according to the steering wheel angle. If the steering wheel angle is less than or equal to the above-mentioned trigger threshold value, it is determined that there is no need to replace the picture. If the steering wheel angle is greater than the above-mentioned trigger threshold value, it is determined that the picture needs to be replaced.

[0055] In order to accurately obtain the picture ID, in some embodiments of the present application, the projection angle to be projected is determined according to the steering wheel angle, where the projection angle to be projected is equal to the difference between the steering wheel angle and a preset trigger threshold value; calculate the ratio of the projection angle to be projected to a preset ratio to obtain the picture ID, where the preset ratio is related to the number of images stored in the image database and the change range of the projection angle to be projected. The change range of the projection angle to be projected is the difference range between the total change range of the steering wheel angle and the trigger threshold value. The number of images stored in the image database is related to the switching step fineness of the pictures. The more images there are, the higher the switching step fineness of the pictures, that is, a picture is changed for every small change in the steering wheel angle. The preset ratio can be set and adjusted as needed. Taking the trigger threshold value of the steering wheel angle as 60 degrees as an example, for the projection angle to be projected to the left and right for the curved light carpet, the change range = 780 - 60 = 720. Taking 300 pictures stored in the image database for each of the left and right directions as an example, the preset ratio = 720 / 300 = 2.4. Thus, the picture ID = steering wheel angle / 2.4.

[0056] In some embodiments of the present application, it is also possible to first determine the steering angle of the tire according to the steering wheel angle, and then determine the picture ID according to the steering angle. Specifically, the ratio of the steering angle to the aforementioned preset angle can be calculated. For example, taking the preset angle as 0.15 as an example, dividing the determined steering angle of the tire by 0.15 will obtain the corresponding picture ID.

[0057] Considering that during the driving of the vehicle, according to different road conditions, the steering wheel may turn left or right. At this time, different pictures are required for the light carpet projection in the application. In some embodiments of the present application, the steering wheel angle information also includes the deflection direction. When obtaining the picture from the pre-stored image database according to the picture ID, the deflection direction also needs to be considered. If the deflection direction indicates 0 deflection, the 0-degree picture in the image database is extracted. Otherwise, according to the deflection direction, the picture library in the pre-stored image database is selected, and the picture corresponding to the picture ID is extracted from the picture library. In this way, even if the calculated picture ID is the same, but when the deflection direction of the steering wheel is different, different pictures will be extracted from the image database, which is beneficial to forming a curved light carpet that strictly matches the road conditions and improves the user driving experience.

[0058] In some embodiments of the present application, in order to accurately obtain the picture for light carpet projection in combination with the deflection direction of the steering wheel, the image database includes a left light carpet projection picture library, the 0-degree picture, and a right light carpet projection picture library. If the deflection direction is left deflection, the left light carpet projection picture library is selected. If the deflection direction is right deflection, the left light carpet projection picture library is selected. The left light carpet projection picture library stores pictures for forming a left-curved light carpet, and the right light carpet projection picture library stores pictures for forming a right-curved light carpet. By storing pictures with different deflection directions in different picture libraries and extracting pictures from the corresponding picture libraries when the deflection directions are different, accurate pictures can be ensured to be extracted.

[0059] In an exemplary embodiment of this specification, a schematic diagram of a dynamic curved light carpet projection method is provided. The maximum left and right rotation angles of the steering wheel of the vehicle are 780 degrees, 60 degrees is the trigger threshold for steering wheel rotation, the change range of the left and right projection angles to be projected is 61 - 780 = 720 degrees, and the angle correspondence between the steering wheel and the tire is 16:1. In the Flash of the electronic controller, pictures designed and calibrated according to parameters such as the height of the vehicle body frame, the nearest and farthest distances of the light carpet to be projected, etc. are pre-stored, including a left light carpet projection picture library storing pictures with picture IDs from 1 to 300, a left light carpet projection picture library storing pictures with picture IDs from 1 to 300, and the 0-degree picture, totaling 601 pictures.

[0060] In order to make the switching steps of the pre-stored pictures delicate, it is selected to switch the picture projection light carpet every 0.15 degrees of the steering angle of the tire, and correspondingly, the picture is switched every 0.15 * 16 = 2.4 degrees of the steering wheel angle. Then 45 / 0.15 = 300 pictures, and the picture ID numbers of the left light carpet projection picture library and the right light carpet projection picture library are the same from 1 to 300. Taking the left side as an example, the detailed correspondence between the steering wheel steering angle and the picture ID is shown in Table 1.

[0061] Table 1 Correspondence between steering wheel angle and picture ID

[0062]

[0063]

[0064] According to the parameters of the megapixel module lens, the vehicle frame, and the projection distance required, the pictures to be projected are calculated and designed in reverse according to the ground projection effect with a 0.15-degree step: 300 pictures in the left light carpet projection picture library, 300 pictures in the right light carpet projection picture library, and the straight light carpet 0-degree picture, totaling 601 pictures. These left, middle, and right 601 pictures are stored in the Flash chip of the electronic controller according to the picture ID. When the left and right steering wheel angles are less than 60, the corresponding projection picture number is light_carpet_ID_0.

[0065] When the vehicle is moving and encounters a bend and the driver turns the steering wheel at an angle such that the tire steering angle steps 0.15 degrees to the left or right, the electronic controller projects the corresponding light carpet images onto the road surface ahead, "BendCarpet_ID_Left_1 to BendCarpet_ID_Left_300", "BendCarpet_ID_Right_1 to BendCarpet_ID_Right_300". The final curved light carpet obtained is shown in Figure 3 . The specific dynamic method for projecting the curved light carpet is as shown in Figure 4 and includes:

[0066] Step 100: The controller software starts running.

[0067] The micro-control unit MCU in the electronic controller is used to write software programs to perform logical judgments based on CAN signal inputs and then control the output and implement the curved light carpet function. Therefore, when the curved light carpet projection is required, this software program is first started to facilitate subsequent curved light carpet projection.

[0068] Step 101: Initialize the lamp board and link the picture database.

[0069] A projection module is installed on the lamp board, which is provided with a Micro-Led with ten thousand pixels for displaying the curved light carpet, a voltage regulator, and a projection controller. The initialization includes powering on the lamp board, continuously supplying power to the Micro-Led through the voltage regulator, establishing a connection between the projection controller and the electronic controller, and linking the picture database.

[0070] Step 102: Determine whether the curved light carpet function has been turned on. If so, execute Step 103; otherwise, jump to execute Step 110.

[0071] Whether the curved light carpet function has been turned on can actually be whether the light carpet on / off switch is in the on state. If it is detected that the light carpet on / off switch is in the on state, it means the curved light carpet function has been turned on. Otherwise, the curved light carpet function has not been turned on.

[0072] Step 103: Determine whether the vehicle speed > 3 km / h. If so, execute Step 104; otherwise, jump to execute Step 110.

[0073] If the vehicle speed, i.e., the speed of the vehicle, is not greater than 3 km / h, it indicates that the vehicle speed is small enough. The driver can use the original headlight of the vehicle for illumination to clearly see the road conditions ahead in a timely manner, and there is no need for additional curved light carpet projection. When the vehicle speed is greater than 3 km / h, it is very likely that the driver cannot clearly see the road conditions ahead in a timely manner using the original headlight of the vehicle, and curved light carpet projection is required to assist in illumination. 3 km / h is the preset steering angle of the tire, that is, the aforementioned preset angle. Of course, other values can also be set according to needs, and no restrictions are imposed here.

[0074] Step 104: Determine whether the steering wheel angle is > 60. If so, execute Step 106 and Step 108; otherwise, execute Step 105.

[0075] When the steering wheel angle is small, the vehicle is approximately going straight and no curved light carpet projection is required. Curved light carpet projection is only required when the steering wheel angle is greater than 60. 60 is the aforementioned trigger threshold value of the steering wheel angle. Of course, other values can also be set according to needs, and no restrictions are imposed here.

[0076] Step 105: Project the light carpet according to the 0-degree picture. Then execute Step 110.

[0077] If the steering wheel angle is less than or equal to 60, the vehicle is approximately going straight. Directly extract the 0-degree picture from the image database and output the picture to the projection module with ten thousand pixels. The projection module converts the picture into Micro Led particle pixels and irradiates them onto the road surface ahead to form a light carpet trajectory of 0-degree front road illumination.

[0078] The 0-degree picture refers to the picture corresponding to the range of the steering wheel angle when the vehicle is approximately going straight, rather than the picture corresponding to the steering wheel angle determined to be 0 degrees. Here, the trigger threshold value is set to 60, so within the range where the left and right steering wheel angles are less than or equal to 60, the 0-degree picture is extracted for curved light carpet projection. If the 0-degree picture is used for curved light carpet projection for a long time, the projected curved light carpet is actually equivalent to a straight light carpet.

[0079] Step 106: Determine whether the steering wheel is deflected to the left. If so, execute Step 107.

[0080] If the steering wheel angle is greater than 60, it is also necessary to consider whether the steering wheel is deflected to the left or to the right. The pictures used for left deflection and right deflection are different.

[0081] Step 107: Project the left curved light carpet according to the picture ID. Then execute Step 110.

[0082] If the steering wheel deflects to the left, extract the picture corresponding to the obtained picture ID from the left light carpet projection picture library, and output the projection module. The projection module converts the picture into Micro Led particle pixels and irradiates them on the road surface ahead to form a light carpet track of left 1-300 road illumination ahead.

[0083] Step 108: Determine whether the steering wheel deflects to the right. If so, execute Step 109.

[0084] If the steering wheel deflects to the right, pictures need to be extracted from the right light carpet projection picture library subsequently.

[0085] Step 109: Project the right-turn light carpet according to the picture ID.

[0086] If the steering wheel deflects to the right, extract the picture corresponding to the obtained picture ID from the right light carpet projection picture library, and output the projection module. The projection module converts the picture into Micro Led particle pixels and irradiates them on the road surface ahead to form a light carpet track of right 1-300 road illumination ahead.

[0087] Step 110: End.

[0088] In the dynamic turn light carpet projection method according to the embodiment of the present application, when the turn light carpet projection condition is met, the corresponding picture is obtained according to the steering wheel angle information of the vehicle obtained every preset time, and the picture is converted into MicroLed particle pixels and projected onto the road surface ahead of the vehicle to form a dynamic turn light carpet. Different steering wheel angle information results in different pictures for forming the turn light carpet, so that when the vehicle changes lanes, the corresponding turn light carpet can be formed. And converting the picture into Micro Led particle pixels and projecting them onto the road surface ahead of the vehicle can reduce the pixel level from millions in the prior art to tens of thousands, which can greatly reduce the cost.

[0089] In an exemplary embodiment of this specification, a dynamic turn light carpet projection device is further provided, which is applied to an electronic controller. As Figure 5 shown, the dynamic turn light carpet projection device 500 includes:

[0090] An information acquisition module 501, configured to obtain the steering wheel angle information of the vehicle every preset time if it is detected that the turn light carpet projection condition is met;

[0091] A picture acquisition module 502, configured to obtain a picture ID according to the steering wheel angle information, and obtain a picture from the pre-stored image database according to the picture ID in combination with the steering wheel angle information;

[0092] A light carpet formation module 503, configured to convert the picture into Micro Led particle pixels and project them onto the road surface ahead of the vehicle to form a dynamic turn light carpet.

[0093] In a specific embodiment, the steering wheel angle information includes the steering wheel rotation angle; the picture acquisition module 502 is further configured to: determine the steering angle of the tire according to the steering wheel rotation angle; determine whether a picture needs to be replaced according to the steering angle; if a picture needs to be replaced, obtain a picture ID according to the steering wheel rotation angle.

[0094] In some embodiments, the picture acquisition module 502 is further configured to: subtract the steering wheel rotation angle from a preset trigger threshold value to obtain a to-be-projected rotation angle; determine the steering angle of the tire according to the to-be-projected rotation angle and a preset angle correspondence relationship, where the angle correspondence relationship is used to indicate the correspondence relationship between the steering wheel rotation angle and the steering angle.

[0095] In some embodiments, the picture acquisition module 502 is further configured to: compare the steering angle with a preset angle; if the steering angle is greater than or equal to the preset angle, determine that a picture needs to be replaced; if the steering angle is less than the preset angle, determine that a picture does not need to be replaced.

[0096] In some embodiments, the picture acquisition module 502 is further configured to: determine a to-be-projected rotation angle according to the steering wheel rotation angle, where the to-be-projected rotation angle is equal to the difference between the steering wheel rotation angle and a preset trigger threshold value; calculate the ratio of the to-be-projected rotation angle to a preset ratio to obtain a picture ID, where the preset ratio is related to the number of images stored in the image database and the variation range of the to-be-projected rotation angle.

[0097] In some embodiments, the steering wheel angle information further includes a deflection direction; the picture acquisition module 502 is further configured to: if the deflection direction indicates 0 deflection, extract a 0-degree picture from the image database; otherwise, select a picture library from the pre-stored image database according to the deflection direction, and extract a picture corresponding to the picture ID from the picture library.

[0098] In some embodiments, the image database includes a left light carpet projection picture library, the 0-degree picture, and a right light carpet projection picture library; the picture acquisition module 502 is further configured to: if the deflection direction is left deflection, select the left light carpet projection picture library; if the deflection direction is right deflection, select the left light carpet projection picture library.

[0099] In some embodiments, the dynamic curved light carpet projection device further includes a condition detection module, and the condition detection module is configured to: detect whether the curved light carpet projection condition is satisfied, specifically including: obtaining the vehicle speed and the state of the light carpet on switch; if the light carpet on switch is in the on state and the vehicle speed is greater than a reference speed, determine that the curved light carpet projection condition is satisfied; otherwise, determine that the curved light carpet projection condition is not satisfied.

[0100] For the specific limitations of the dynamic curved light carpet projection device, reference can be made to the limitations of the dynamic curved light carpet projection method in the foregoing text, which will not be elaborated herein. Each module in the above-mentioned dynamic curved light carpet projection device can be implemented in whole or in part by software, hardware, or a combination thereof. The above-mentioned modules can be embedded in the processor of the computer device in the form of hardware or be independent of it, or be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to each of the above-mentioned modules.

[0101] Regarding the device in the above-mentioned embodiments, the specific manners in which each unit performs operations have been described in detail in the embodiments of the dynamic curved light carpet projection method, and will not be elaborated herein.

[0102] Figure 6 It is a schematic structural diagram of a vehicle provided by an embodiment of the present application.

[0103] Exemplarily, as Figure 6 shown, the vehicle includes: a memory 601 and a processor 602. Among them, an executable program code 6011 is stored in the memory 601, and the processor 602 is configured to call and execute the executable program code 6011 to execute the dynamic curved light carpet projection method.

[0104] In this embodiment, the vehicle can be divided into functional modules according to the above method embodiment. For example, it can correspond to each functional module, or two or more functions can be integrated into one processing module. The above-mentioned integrated module can be implemented in the form of hardware. It should be noted that the division of modules in this embodiment is illustrative, only a logical function division, and there can be other division methods in actual implementation.

[0105] In the case of dividing each functional module according to each function, the vehicle can include: a data acquisition module, an instruction control module, a voltage regulation module, etc.

[0106] It should be noted that all relevant contents of each step involved in the above method embodiment can be cited in the function description of the corresponding functional module, which will not be elaborated herein.

[0107] The vehicle provided by this embodiment is used to execute the above-mentioned dynamic curved light carpet projection method, and thus can achieve the same effect as the above implementation method.

[0108] In the case of adopting an integrated unit, the vehicle can include a processing module and a storage module. Among them, the processing module can be used to control and manage the actions of the vehicle. The storage module can be used to support the vehicle to execute mutual program codes and data, etc.

[0109] Among them, the processing module can be a processor or a controller, which can implement or execute various exemplary logic blocks, modules, and circuits described in connection with the disclosure of this application. The processor can also be a combination that implements computing functions, such as including a combination of one or more microprocessors, a combination of digital signal processing (DSP) and a microprocessor, etc. The storage module can be a memory.

[0110] This embodiment also provides a computer-readable storage medium. Computer program code is stored in the computer-readable storage medium (including but not limited to disk memories, CD-ROMs, optical memories, etc.). When the computer program code runs on a computer, it causes the computer to execute the above-related method steps to implement a dynamic curved light carpet projection method provided in the above embodiment. Among them, the computer-readable storage medium can include but not be limited to any type of disk, including floppy disks, optical discs, digital versatile discs (DVDs), compact disc read-only memories (CD-ROMs), microdrives, and magneto-optical discs, read-only memories (ROMs), random access memories (RAMs), erasable programmable read-only memories (EPROMs), electrically erasable programmable read-only memories (EEPROMs), dynamic random access memories (DRAMs), video random access memories (VRAMs), flash memory devices, magnetic cards or optical cards, nanosystems (including molecular memory ICs), or any type of medium or device suitable for storing instructions and / or data.

[0111] This embodiment also provides a computer program product. When the computer program product runs on a computer, it causes the computer to execute the above-related steps to implement a dynamic curved light carpet projection method provided in the above embodiment.

[0112] Among them, for the beneficial effects of the above embodiment, reference can be made to the beneficial effects in the corresponding method provided above, which will not be elaborated here.

[0113] Through the description of the above embodiments, those skilled in the art can understand that for the convenience and brevity of description, only the division of the above functional modules is used as an example. In actual applications, the above functions can be allocated to different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

[0114] In the embodiments provided in the present application, it should be understood that the disclosed device and method can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection of the device or unit can be electrical, mechanical or other forms.

[0115] In the description of the present disclosure, it should be understood that if terms such as "upper", "lower", "front", "rear", "left" and "right" are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated position or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure.

[0116] It should be noted that in the embodiments of the present application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. It should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, commodity or device. Without further limitation, the element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, commodity or device including the element.

[0117] The above are only the embodiments of the present disclosure and are not used to limit the present disclosure. For those skilled in the art, the present disclosure can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included within the scope of the claims of the present disclosure.

Claims

1. A dynamic curved light carpet projection method, characterized in that, Applied to an electronic controller, the method includes: If it is detected that the curved light carpet projection condition is met, obtain the steering wheel angle information of the vehicle at preset intervals; Obtain a picture ID according to the steering wheel angle information, and obtain a picture from a pre-stored image database according to the picture ID in combination with the steering wheel angle information; Convert the picture into Micro Led particle pixels and project them onto the road surface in front of the vehicle to form a dynamic curved light carpet.

2. The method according to claim 1, wherein The steering wheel angle information includes the steering wheel rotation angle; before obtaining the picture ID according to the steering wheel angle information, it includes: Determine the steering angle of the tire according to the steering wheel rotation angle; Determine whether a picture needs to be replaced according to the steering angle; If a picture needs to be replaced, execute the step of obtaining the picture ID according to the steering wheel rotation angle.

3. The method according to claim 2, wherein The determining the steering angle of the tire according to the steering wheel rotation angle includes: Subtract the steering wheel rotation angle from a preset trigger threshold value to obtain a projection angle to be projected; Determine the steering angle of the tire according to the projection angle to be projected and a preset angle correspondence relationship, where the angle correspondence relationship is used to indicate the correspondence relationship between the steering wheel rotation angle and the steering angle.

4. The method according to claim 2, wherein The determining whether a picture needs to be replaced according to the steering angle includes: Compare the steering angle with a preset angle; If the steering angle is greater than or equal to the preset angle, determine that a picture needs to be replaced; If the steering angle is less than the preset angle, determine that a picture does not need to be replaced.

5. The method according to claim 2, wherein The obtaining the picture ID according to the steering wheel angle information includes: Determine the projection angle to be projected according to the steering wheel rotation angle, where the projection angle to be projected is equal to the difference between the steering wheel rotation angle and a preset trigger threshold value; Calculate the ratio of the projection angle to be projected to a preset ratio to obtain a picture ID, where the preset ratio is related to the number of images stored in the image database and the change range of the projection angle to be projected.

6. The method according to claim 2, wherein The steering wheel angle information further includes a deflection direction; the obtaining the picture from the pre-stored image database according to the picture ID includes: If the deflection direction indicates 0 deflection, extract the 0-degree picture in the image database; Otherwise, select a picture library in the pre-stored image database according to the deflection direction, and extract the picture corresponding to the picture ID from the picture library.

7. The method according to claim 6, characterized in that, The image database includes a left light carpet projection picture library, the 0-degree picture, and a right light carpet projection picture library; the determining the picture library in the pre-stored image database according to the deflection direction includes: If the deflection direction is left deflection, select the left light carpet projection picture library; If the deflection direction is right deflection, select the left light carpet projection picture library.

8. The method according to claim 1, wherein Before the step of if it is detected that the light carpet projection condition is met and obtaining the steering wheel angle information of the vehicle at preset intervals, it includes: Detect whether the curved light carpet projection condition is met, specifically including: Obtain the vehicle speed and the state of the light carpet switch; If the light carpet switch is in the on state and the vehicle speed is greater than the reference speed, determine that the curved light carpet projection condition is met; otherwise, determine that the curved light carpet projection condition is not met.

9. A dynamic curved light carpet projection device, characterized in that, Applied to an electronic controller, the device includes: An information acquisition module, configured to obtain the steering wheel angle information of the vehicle at preset intervals if it is detected that the conditions for the projection of the curved light carpet are met; A picture acquisition module, configured to obtain a picture ID according to the steering wheel angle information, and obtain a picture from a pre-stored image database according to the picture ID in combination with the steering wheel angle information; A light carpet formation module, configured to convert the picture into Micro Led particle pixels and project them onto the road surface in front of the vehicle to form a dynamic curved light carpet.

10. A vehicle, characterized in that, The vehicle includes: A memory, configured to store executable program codes; A processor, configured to call and run the executable program codes from the memory, so that the vehicle executes the method according to any one of claims 1 to 8.

11. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, which when executed, implements the method according to any one of claims 1 to 8.

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