A method for controlling the ground projection of turn patterns based on automotive projection lights

Abstract

This disclosure provides a method for controlling ground projection of steering patterns based on automotive projection lights. The method includes acquiring steering motion state parameters from a steering sensor; performing differential processing on the steering motion state parameters and preset steering parameters to obtain a projected steering difference component; and sending a steering projection on / off signal to a steering projection controller based on the projected steering difference component. After acquiring the steering motion state parameters, the steering status of the vehicle during its current movement is determined by the steering sensor. Then, the steering motion state parameters are compared with standard steering state parameters to determine the difference between the current vehicle steering state and the standard vehicle steering state. Finally, based on the difference value, the projection operating mode of each steering projection light source is adjusted by the steering projection controller, facilitating the adjustment of the on / off state of the steering projection light sources and effectively improving the timeliness of surrounding warnings.

Description

Technical Field

[0001] This disclosure relates to the field of projection lamp technology, and in particular to a method for controlling the ground projection of turn patterns based on automotive projection lamps. Background Technology

[0002] With the increasing demands for industry regulations and active safety, ground symbol projection modules and adaptive high beam modules have become important directions in the development of automotive lighting. Both are suitable for different operating conditions: adaptive high beam modules project lighting patterns as parallel light directly in front of the vehicle, primarily operating at high speeds to provide long-distance illumination for the driver while avoiding glare for pedestrians and other drivers; ground symbol projection modules project lighting patterns onto the ground in front of the vehicle, primarily operating at low speeds and when stationary, providing warning signals such as vehicle turning and stopping to pedestrians and other drivers, becoming a new channel for human / vehicle and vehicle / vehicle information interaction, as seen in applications CN202110505005.X and CN201910442499.4.

[0003] However, traditional ground projection modules require the driver to toggle or press a corresponding projection button to trigger the projection of the lighting pattern onto the ground in front of the car. In cases where the driver experiences a physical abnormality that causes the vehicle to lose control, such as a sudden heart attack, the driver may not be able to stop the vehicle or press the button on the ground projection module in time to alert pedestrians and other vehicles, which could easily lead to serious personal injury accidents. Summary of the Invention

[0004] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a method for controlling the ground projection of turn patterns based on automotive projection lights to effectively improve the timeliness of warnings to the surroundings through turn projection.

[0005] The purpose of this disclosure is achieved through the following technical solution:

[0006] A method for controlling ground projection of turn signals using automotive projection lights includes: projecting turn signals onto the ground using automotive projection lights, wherein the automotive projection lights include: a projection light body, a turn sensor, a turn signal projection controller, and multiple turn signal projection components; the projection light body is installed in the turn signal light slot of an automotive vehicle; each turn signal projection component includes a turn signal projection light source and a projection film; the turn signal projection light source is disposed within the projection light body, with its light-emitting end facing the projection outlet of the projection light body; the light-emitting end of each turn signal projection light source is correspondingly disposed with one of the projection films, and the multiple turn signal projection light sources are arranged sequentially at intervals; the turn sensor is disposed within the projection light body; the turn signal projection controller is disposed within the projection light body, with its sensing input terminal electrically connected to the output terminal of the turn sensor, and its projection output terminal electrically connected to each of the turn signal projection light sources to adjust the projection switching of the multiple turn signal projection light sources;

[0007] The method for controlling the ground projection of the turning pattern includes:

[0008] Obtain the steering motion state parameters from the steering sensor;

[0009] The steering motion state parameters and preset steering parameters are subjected to differential processing to obtain the projected steering difference component;

[0010] The steering projection controller is sent a steering projection start / stop signal according to the steering projection differential component to adjust the projection working mode of each steering projection light source.

[0011] In one embodiment, obtaining the steering motion state parameters of the steering sensor includes: obtaining the steering deflection angle of the steering sensor.

[0012] In one embodiment, the step of performing a differential processing on the steering motion state parameters and preset steering parameters to obtain a projected steering difference component includes: calculating the difference between the steering deflection angle and the preset deflection angle to obtain a steering angle difference.

[0013] In one embodiment, the step of sending a steering projection start / stop signal to the steering projection controller based on the projection steering difference component to adjust the projection working mode of each of the steering projection light sources includes: detecting whether the steering angle difference is greater than a preset steering angle difference; when the steering angle difference is greater than the preset steering angle difference, sending a right turn flowing projection start signal to the steering projection controller.

[0014] In one embodiment, after detecting whether the steering angle difference is greater than a preset steering angle difference, the method further includes: when the steering angle difference is less than the preset steering angle difference, sending a left turn flowing projection start signal to the steering projection controller.

[0015] In one embodiment, after detecting whether the steering angle difference is greater than a preset steering angle difference, the method further includes: when the steering angle difference is equal to the preset steering angle difference, sending a steering projection shutdown signal to the steering projection controller.

[0016] In one embodiment, obtaining the steering motion state parameters of the steering sensor includes: obtaining the steering yaw acceleration of the steering sensor.

[0017] In one embodiment, the step of performing differential processing on the steering motion state parameters and preset steering parameters to obtain the projected steering difference component includes: calculating the difference between the steering yaw acceleration and the preset yaw acceleration to obtain the steering acceleration difference.

[0018] In one embodiment, the step of sending a steering projection start / stop signal to the steering projection controller based on the projection steering difference component to adjust the projection working mode of each of the steering projection light sources includes: detecting whether the steering acceleration difference is greater than a preset steering acceleration difference; when the steering acceleration difference is greater than the preset steering acceleration difference, sending a right turn flowing projection start signal to the steering projection controller.

[0019] In one embodiment, the step of detecting whether the steering acceleration difference is greater than a preset steering acceleration difference further includes: when the steering acceleration difference is less than the preset steering acceleration difference, sending a left turn flowing projection start signal to the steering projection controller.

[0020] Compared with the prior art, this disclosure has at least the following advantages:

[0021] After collecting the steering motion state parameters, the steering status of the vehicle during its current movement is determined by the steering sensor. Then, the steering motion state parameters are compared with the standard steering state parameters to determine the difference between the current vehicle steering status and the standard vehicle steering. Finally, based on the above difference value, the projection working mode of each steering projection light source is adjusted by the steering projection controller, which facilitates the adjustment of the on / off state of the steering projection light source. This allows for the output of steering projection onto the ground when the vehicle is out of control, effectively improving the timeliness of warnings to the surrounding area. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a flowchart of a method for controlling the ground projection of a turn pattern based on a car projection lamp, as described in one embodiment. Detailed Implementation

[0024] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] This disclosure relates to a method for controlling the ground projection of a steering pattern based on automotive projection lights. In one embodiment, the method includes acquiring steering motion state parameters of a steering sensor; performing differential processing on the steering motion state parameters and preset steering parameters to obtain a projected steering difference component; and sending a steering projection on / off signal to a steering projection controller based on the projected steering difference component to adjust the projection operating mode of each steering projection light source. After acquiring the steering motion state parameters, the steering status of the steering sensor during the current vehicle movement is determined. Then, the steering motion state parameters are compared with standard steering state parameters to determine the difference between the current vehicle steering state and the standard vehicle steering state. Finally, based on the difference value, the projection operating mode of each steering projection light source is adjusted by the steering projection controller, which facilitates the adjustment of the on / off state of the steering projection light sources. This allows for the output of steering projection onto the ground when the vehicle is out of control, effectively improving the timeliness of warnings to the surrounding area.

[0028] Please see Figure 1 This is a flowchart illustrating a method for controlling the ground projection of a turn pattern based on an automotive projection lamp, according to an embodiment of this disclosure. The automotive projection lamp includes: a projection lamp body, a turn sensor, a turn projection controller, and multiple turn projection components. The projection lamp body is installed within the turn signal slot of the vehicle. Each turn projection component includes a turn projection light source and a projection film. The turn projection light source is disposed within the projection lamp body, with its light-emitting end facing the projection outlet of the projection lamp body. Each light-emitting end of the turn projection light source corresponds to a projection film, and the multiple turn projection light sources are arranged sequentially at intervals. The turn sensor is disposed within the projection lamp body and is used to sense the vehicle's turn. The turn projection controller is disposed within the projection lamp body, with its sensing input terminal electrically connected to the output terminal of the turn sensor, and its projection output terminal electrically connected to each of the turn projection light sources to adjust the projection switching of the multiple turn projection light sources. The method for controlling the ground projection of a turn pattern based on an automotive projection lamp includes some or all of the following steps.

[0029] The method for controlling the ground projection of the turning pattern includes:

[0030] S100: Acquire steering motion state parameters from the steering sensor.

[0031] In this embodiment, the steering motion state parameter is the steering motion data sensed by the steering sensor, that is, the steering motion state parameter is the current steering state of the vehicle sensed by the steering sensor, and the steering motion state parameter corresponds to the steering movement mode of the vehicle. By collecting the steering motion state parameter, it is easy to determine when the steering sensor senses a change in the vehicle's steering, thereby facilitating the determination of the vehicle's real-time motion state.

[0032] S200: Perform differential processing on the steering motion state parameters and preset steering parameters to obtain the projected steering differential component.

[0033] In this embodiment, the steering motion state parameter is the steering motion data sensed by the steering sensor, that is, the steering motion state parameter is the current steering state of the vehicle sensed by the steering sensor, and thus corresponds to the steering movement mode of the vehicle. By collecting the steering motion state parameter, it is easy to determine when the steering sensor senses a change in the vehicle's steering, thereby facilitating the determination of the vehicle's real-time motion state. The preset steering parameter is the standard steering motion data sensed by the steering sensor, that is, the steering motion state parameter is the reference steering state of the vehicle sensed by the steering sensor, and thus corresponds to a specified steering movement mode of the vehicle. By performing differential processing on the steering motion state parameter and the preset steering parameter, it is easy to determine the degree of steering deviation sensed by the steering sensor, thereby facilitating the determination of whether the vehicle has undergone steering movement.

[0034] S300: Send a steering projection start / stop signal to the steering projection controller according to the projection steering differential component, so as to adjust the projection working mode of each steering projection light source.

[0035] In this embodiment, the projected steering differential component is obtained based on the steering motion state parameters and the preset steering parameters. The steering motion state parameters are the steering motion data sensed by the steering sensor, that is, the steering motion state parameters are the current steering state of the vehicle sensed by the steering sensor, and thus correspond to the steering movement mode of the vehicle. By collecting the steering motion state parameters, it is easy to determine when the steering sensor senses a change in the vehicle's steering, thereby facilitating the determination of the vehicle's real-time motion state. The preset steering parameters are the standard steering motion data sensed by the steering sensor, that is, the steering motion state parameters are the reference steering state of the vehicle sensed by the steering sensor, and thus correspond to the specified steering movement mode of the vehicle. By performing projection differential processing on the steering motion state parameters and the preset steering parameters, it is easy to determine the degree of steering deviation sensed by the steering sensor, thereby facilitating the determination of whether the vehicle has undergone steering movement. After acquiring the projection steering difference component, the steering sensor detects that the car has turned and confirms this. By sending a steering projection start / stop signal to the steering projection controller, the steering projection controller can adjust the projection working mode of each steering projection light source, so as to output the corresponding ground projection for warning in a timely manner.

[0036] In the above embodiment, after collecting the steering motion state parameters, the steering status of the vehicle during the current vehicle movement is determined by the steering sensor. Then, the steering motion state parameters are compared with the standard steering state parameters to determine the difference between the current vehicle steering status of the steering sensor and the standard vehicle steering. Finally, based on the difference value, the projection working mode of each steering projection light source is adjusted by the steering projection controller to adjust the on / off state of the steering projection light source. This facilitates the output of steering projection onto the ground when the vehicle is out of control, effectively improving the timeliness of warnings to the surroundings.

[0037] In one embodiment, acquiring the steering motion state parameters of the steering sensor includes acquiring the steering deflection angle of the steering sensor. In this embodiment, the steering motion state parameters are the steering motion data sensed by the steering sensor, that is, the steering motion state parameters are the current steering state of the vehicle sensed by the steering sensor, and thus correspond to the steering movement mode of the vehicle. By collecting the steering motion state parameters, it is easy to determine when the steering sensor senses a change in the vehicle's steering, thereby facilitating the determination of the vehicle's real-time motion state. The steering motion state parameters include the steering deflection angle of the steering sensor, which is the steering direction angle of the vehicle sensed by the steering sensor. Specifically, the steering sensor includes a gyroscope, and by collecting the steering deflection angle from the gyroscope, it is easy to determine the magnitude of the steering deflection sensed by the steering sensor.

[0038] Further, the step of performing differential processing on the steering motion state parameters and preset steering parameters to obtain the projected steering difference component includes: calculating the difference between the steering deflection angle and the preset deflection angle to obtain the steering angle difference. In this embodiment, the steering motion state parameters are the steering motion data sensed by the steering sensor, that is, the steering motion state parameters are the current steering state of the vehicle sensed by the steering sensor, and the steering motion state parameters correspond to the steering movement mode of the vehicle. By collecting the steering motion state parameters, it is easy to determine when the steering sensor senses a change in the vehicle's steering, thereby facilitating the determination of the vehicle's real-time motion state. The preset steering parameters are the standard steering motion data sensed by the steering sensor, that is, the steering motion state parameters are the reference steering state of the vehicle sensed by the steering sensor, and the steering motion state parameters correspond to the specified steering movement mode of the vehicle. By performing differential processing on the steering motion state parameters and the preset steering parameters, it is easy to determine the degree of steering deviation sensed by the steering sensor, thereby facilitating the determination of whether the vehicle has undergone steering movement. The steering motion state parameters include the steering deflection angle of the steering sensor, which is the angle at which the steering sensor senses the steering direction of the vehicle. By collecting the steering deflection angle, the magnitude of the steering deflection sensed by the steering sensor can be determined. By calculating the difference between the steering deflection angle and a preset deflection angle, the degree of steering deviation sensed by the steering sensor can be determined, thereby determining the situation where the steering sensor senses the vehicle's steering deviation from the center position.

[0039] Furthermore, the step of sending a steering projection start / stop signal to the steering projection controller based on the projection steering difference component to adjust the projection working mode of each of the steering projection light sources includes: detecting whether the steering angle difference is greater than a preset steering angle difference; when the steering angle difference is greater than the preset steering angle difference, sending a right turn sequential projection start signal to the steering projection controller. In this embodiment, the projection steering difference component is obtained based on the steering motion state parameters and the preset steering parameters. The steering motion state parameters are the steering motion data sensed by the steering sensor, that is, the steering motion state parameters are the current steering state of the vehicle sensed by the steering sensor, and the steering motion state parameters correspond to the steering movement mode of the vehicle. By collecting the steering motion state parameters, it is easy to determine the situation where the steering sensor senses a change in the vehicle's steering, thereby facilitating the determination of the vehicle's real-time motion state. The preset steering parameters are the standard steering motion data sensed by the steering sensor, that is, the steering motion state parameters are the reference steering state of the vehicle sensed by the steering sensor, and the steering motion state parameters correspond to the specified steering movement mode of the vehicle. By performing differential processing on the steering motion state parameters and the preset steering parameters, it is easy to determine the degree of steering deviation sensed by the steering sensor, thereby facilitating the determination of whether the vehicle has undergone steering movement. After acquiring the projected steering differential component, it is confirmed that the steering sensor has sensed vehicle steering. By sending a steering projection on / off signal to the steering projection controller, the steering projection controller can adjust the projection working mode of each steering projection light source, facilitating timely output of the corresponding ground projection for warning. The steering motion state parameters include the steering deflection angle of the steering sensor, which is the steering direction angle of the vehicle sensed by the steering sensor. By collecting the steering deflection angle, it is easy to determine the magnitude of the steering deflection sensed by the steering sensor. By calculating the difference between the steering deflection angle and the preset deflection angle, the degree of steering deviation sensed by the steering sensor is determined, thereby determining the situation where the steering sensor senses the car's steering deviation from the center position. If the steering deflection angle difference is greater than the preset steering deflection angle difference, it indicates that the steering sensor senses a significant degree of steering deviation from the center, and that the car's deflection is a large rightward angle deflection, i.e., the car is turning sharply to the right. In this case, a right-turn flowing projection activation signal is sent to the steering projection controller to promptly issue a right-turn flowing projection, creating a continuous and flashing rightward projection pattern on the ground, such as a flowing rightward arrow.

[0040] In another embodiment, after detecting whether the steering angle difference is greater than a preset steering angle difference, the method further includes: when the steering angle difference is less than the preset steering angle difference, sending a left-turn sequential projection activation signal to the steering projection controller. In this embodiment, the steering angle difference being less than the preset steering angle difference indicates that the steering sensor has detected a significant deviation of the vehicle from the center of gravity, and that the vehicle's deflection is a large leftward angle deflection, i.e., the vehicle is turning sharply to the left. At this time, by sending a left-turn sequential projection activation signal to the steering projection controller, a timely left-turn sequential projection is generated, resulting in a continuous and flashing leftward projection pattern on the ground, such as a flowing leftward arrow.

[0041] In another embodiment, after detecting whether the steering angle difference is greater than a preset steering angle difference, the method further includes: when the steering angle difference is equal to the preset steering angle difference, sending a steering projection off signal to the steering projection controller. In this embodiment, the steering angle difference being equal to the preset steering angle difference indicates that the steering sensor has detected that the vehicle has not steered off course, i.e., the vehicle is moving along the positive centerline. At this time, by sending a steering projection off signal to the steering projection controller, the vehicle's direction of movement remains centered, with no steering deviation.

[0042] In one embodiment, acquiring the steering motion state parameters of the steering sensor includes acquiring the steering deflection acceleration of the steering sensor. In this embodiment, the steering motion state parameters are the steering motion data sensed by the steering sensor, that is, the steering motion state parameters are the current steering state of the vehicle sensed by the steering sensor, and thus correspond to the steering movement mode of the vehicle. By collecting the steering motion state parameters, it is easy to determine when the steering sensor senses a change in the vehicle's steering, thereby facilitating the determination of the vehicle's real-time motion state. The steering motion state parameters include the steering deflection acceleration of the steering sensor, which is the acceleration of the steering speed of the vehicle sensed by the steering sensor. Specifically, the steering sensor includes an accelerometer, and by collecting the steering deflection acceleration from the accelerometer, it is easy to determine how fast the steering deflection of the vehicle sensed by the steering sensor is.

[0043] Further, the step of performing differential processing on the steering motion state parameters and preset steering parameters to obtain the projected steering difference component includes: calculating the difference between the steering yaw acceleration and the preset yaw acceleration to obtain the steering acceleration difference. In this embodiment, the steering motion state parameters are the steering motion data sensed by the steering sensor, that is, the steering motion state parameters are the current steering state of the vehicle sensed by the steering sensor, and the steering motion state parameters correspond to the steering movement mode of the vehicle. By collecting the steering motion state parameters, it is easy to determine when the steering sensor senses a change in the vehicle's steering, thereby facilitating the determination of the vehicle's real-time motion state. The preset steering parameters are the standard steering motion data sensed by the steering sensor, that is, the steering motion state parameters are the reference steering state of the vehicle sensed by the steering sensor, and the steering motion state parameters correspond to the specified steering movement mode of the vehicle. By performing differential processing on the steering motion state parameters and the preset steering parameters, it is easy to determine the degree of steering deviation sensed by the steering sensor, thereby facilitating the determination of whether the vehicle has undergone steering movement. The steering motion state parameters include the steering deflection acceleration of the steering sensor, which is the acceleration of the steering speed of the vehicle sensed by the steering sensor. By collecting the steering deflection acceleration, it is easy to determine how quickly the steering sensor detects the vehicle's steering deflection. By calculating the difference between the steering deflection acceleration and a preset deflection acceleration, the rate of steering deviation detected by the steering sensor can be determined, thereby determining the situation where the steering sensor detects the vehicle's steering deviation from the center position.

[0044] Furthermore, the step of sending a steering projection start / stop signal to the steering projection controller based on the projection steering difference component to adjust the projection working mode of each of the steering projection light sources includes: detecting whether the steering acceleration difference is greater than a preset steering acceleration difference; when the steering acceleration difference is greater than the preset steering acceleration difference, sending a right turn sequential projection start signal to the steering projection controller. In this embodiment, the projection steering difference component is obtained based on the steering motion state parameters and the preset steering parameters. The steering motion state parameters are the steering motion data sensed by the steering sensor, that is, the steering motion state parameters are the current steering state of the vehicle sensed by the steering sensor, and the steering motion state parameters correspond to the steering movement mode of the vehicle. By collecting the steering motion state parameters, it is easy to determine the situation where the steering sensor senses a change in the vehicle's steering, thereby facilitating the determination of the vehicle's real-time motion state. The preset steering parameters are the standard steering motion data sensed by the steering sensor, that is, the steering motion state parameters are the reference steering state of the vehicle sensed by the steering sensor, and the steering motion state parameters correspond to the specified steering movement mode of the vehicle. By performing differential processing on the steering motion state parameters and the preset steering parameters, it is easy to determine how fast the steering sensor senses the vehicle's steering deviation, thereby facilitating the determination of whether the vehicle has undergone steering movement. After acquiring the projected steering differential component, it is confirmed that the steering sensor has sensed the vehicle's steering. By sending a steering projection on / off signal to the steering projection controller, the steering projection controller can adjust the projection working mode of each steering projection light source, facilitating timely output of the corresponding ground projection for warning. The steering motion state parameters include the steering deflection acceleration of the steering sensor, which is the acceleration of the steering speed sensed by the steering sensor. By collecting the steering deflection acceleration, it is easy to determine how fast the steering sensor senses the vehicle's steering deflection. By calculating the difference between the steering deflection acceleration and the preset deflection acceleration, the rate at which the steering sensor detects the vehicle's steering deviation is determined, thereby determining the steering sensor's detection of the vehicle's steering deviation from the center position. If the steering acceleration difference is greater than the preset steering acceleration difference, it indicates that the steering sensor detects a rapid deviation from the center, and that the vehicle's deflection is a rapid rightward deflection, meaning the vehicle is turning right with high acceleration. In this case, a right-turn flowing projection activation signal is sent to the steering projection controller to promptly generate a right-turn flowing projection, creating a continuous and flashing rightward projection pattern on the ground, such as a flowing rightward arrow.

[0045] In another embodiment, after detecting whether the steering acceleration difference is greater than a preset steering acceleration difference, the method further includes: when the steering acceleration difference is less than the preset steering acceleration difference, sending a left-turn sequential projection activation signal to the steering projection controller. In this embodiment, the steering acceleration difference being less than the preset steering acceleration difference indicates that the steering sensor detects a relatively rapid deviation of the vehicle from the center of gravity, and that the vehicle's deflection is a rapid leftward deflection, i.e., the vehicle is turning left with high acceleration. At this time, by sending a left-turn sequential projection activation signal to the steering projection controller, a timely left-turn sequential projection is emitted, resulting in a continuous and flashing leftward projection pattern on the ground, such as a flowing leftward arrow.

[0046] In another embodiment, after detecting whether the steering acceleration difference is greater than a preset steering acceleration difference, the method further includes: when the steering acceleration difference is equal to the preset steering acceleration difference, sending a steering projection shutdown signal to the steering projection controller. In this embodiment, the steering acceleration difference being equal to the preset steering acceleration difference indicates that the steering sensor senses a smooth vehicle steering, i.e., a small steering amplitude. At this time, by sending a steering projection shutdown signal to the steering projection controller, the vehicle's direction of movement tends to remain centered.

[0047] During the actual projection process of the steering sensor when the vehicle deviates from its steering course, the vehicle's projection light projects the steering pattern onto the ground, primarily onto the ground to the left or right front of the vehicle. However, when passing pedestrian crossings or ramps, if a turn is required, the steering pattern, being predominantly white, can easily be confused with ground markings, making it difficult for bystanders to quickly identify and resulting in a poor warning effect.

[0048] To improve the recognizability of the turn signals, the step of sending turn projection on / off signals to the turn projection controller based on the projected turn difference components to adjust the projection working mode of each turn projection light source also includes:

[0049] Obtain the ground projection brightness ratio of the steering sensor;

[0050] Detect whether the ground projection brightness ratio matches the preset brightness ratio;

[0051] When the ground projection brightness ratio is less than or equal to the preset brightness ratio, a projection grayscale signal is sent to the steering projection controller to increase the grayscale of the steering pattern.

[0052] In this embodiment, the ground projection brightness ratio is the ratio between the brightness of the light projected by the car's projector headlights, collected by the steering sensor, and the brightness of the ground markings. Specifically, the steering sensor also includes a CCD camera, which collects the brightness of the steering pattern projected by the car's projector headlights onto the ground. Simultaneously, the CCD camera also collects the brightness of the ground markings to determine the brightness ratio between the steering pattern and the ground markings. If the ground projection brightness ratio matches the preset brightness ratio, it indicates that the brightness difference between the steering pattern and the ground markings is too small, meaning the brightness of the steering pattern and the ground markings are comparable. In this case, a projection grayscale signal is sent to the steering projection controller to increase the grayscale of the steering pattern, allowing the steering pattern and the ground markings to be distinguished by grayscale color difference, thereby improving the recognizability of the steering pattern on the ground.

[0053] Further, the step of detecting whether the ground projection brightness ratio matches a preset brightness ratio further includes:

[0054] When the ground projection brightness ratio does not match the preset brightness ratio, the longitudinal spacing ratio of the ground projection of the steering sensor is obtained;

[0055] Detect whether the longitudinal spacing ratio of the ground projection matches the preset longitudinal spacing ratio;

[0056] When the longitudinal spacing ratio of the ground projection matches the preset longitudinal spacing ratio, a projection reduction amplification signal is sent to the steering projection controller to reduce the distance between each steering pattern and increase the lateral distance of the steering pattern.

[0057] In this embodiment, the ground projection brightness ratio does not match the preset brightness ratio. At this time, the brightness difference between the turn signal pattern and the ground marking is significant. Although it can be detected, it may not be easy to spot if the ground marking pattern and the turn signal pattern are too similar in shape. To address the issue of timely warnings for similar images, further differentiation of the ground projection patterns is needed. The ground projection longitudinal spacing ratio is a comparison of the longitudinal size between the ground marking pattern and the turn signal pattern. Specifically, the ground projection longitudinal spacing ratio is the ratio of the image width of the turn signal pattern to the image width of the ground marking pattern in the turning direction, used to determine the width of the turn signal pattern along the vehicle's turning direction. The matching of the longitudinal spacing ratio of the ground projection with the preset longitudinal spacing ratio indicates that the longitudinal width of the turning pattern is similar to the longitudinal width of the marking pattern on the ground. This means that the difference between the width of the turning pattern and the width of the marking pattern on the ground is too small in the turning direction. In this case, the turning pattern is easily indistinguishable from the marking pattern on the ground, which is not conducive to warning recognition. By sending a projection reduction amplification signal to the turning projection controller, the distribution distance between each turning pattern is reduced in the turning direction, making the turning patterns projected on the ground denser. This facilitates the projection of part of the turning pattern into the gaps between the marking patterns on the ground. At the same time, the lateral distance of the turning pattern is increased, that is, the length of the turning pattern perpendicular to the turning direction is increased, so that the turning pattern projected on the ground exceeds the marking pattern on the ground, further effectively improving the warning recognition of the turning pattern.

[0058] In another embodiment, the lateral distance of the steering pattern is increased in the projection scaling signal so that the lateral distance of the steering pattern in the steering direction is distributed in a gradual manner, for example, the lateral distance of the steering pattern in the steering direction gradually decreases.

[0059] In another embodiment, when the longitudinal spacing ratio of the ground projection does not match the preset longitudinal spacing ratio, step S300 is executed.

[0060] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A method for controlling the ground projection of a turn pattern based on automotive projection lights, characterized in that, include: A ground projection of a turn signal pattern using automotive projection lights, wherein the automotive projection lights include: A projection lamp body, which is used to be installed in the turn signal slot of a car; Multiple directional projection components, each of which includes a directional projection light source and a projection film, wherein the directional projection light source is disposed in the projection lamp body, the light-emitting end of the directional projection light source faces the projection outlet of the projection lamp body, the light-emitting end of each directional projection light source is correspondingly disposed with a projection film, and the multiple directional projection light sources are arranged sequentially at intervals. A steering sensor, wherein the steering sensor is disposed within the projection lamp body; A steering projection controller is disposed within the projection lamp body. The sensing input terminal of the steering projection controller is electrically connected to the output terminal of the steering sensor, and the projection output terminal of the steering projection controller is electrically connected to each of the steering projection light sources to adjust the projection switch of the multiple steering projection light sources. The method for controlling the ground projection of the turning pattern includes: Obtain the steering motion state parameters from the steering sensor; The steering motion state parameters and preset steering parameters are subjected to differential processing to obtain the projected steering difference component; The steering projection controller is sent a steering projection start / stop signal according to the steering projection differential component to adjust the projection working mode of each steering projection light source.

2. The method for controlling the ground projection of a turn pattern based on a car projection lamp according to claim 1, characterized in that, The acquisition of steering motion state parameters from the steering sensor includes: Obtain the steering deflection angle of the steering sensor.

3. The method for controlling the ground projection of a turn pattern based on a car projection lamp according to claim 2, characterized in that, The step of performing differential processing on the steering motion state parameters and preset steering parameters to obtain the projected steering difference component includes: The difference between the steering deflection angle and the preset deflection angle is calculated to obtain the steering deflection angle difference.

4. The method for controlling the ground projection of a turn pattern based on a car projection lamp according to claim 3, characterized in that, The step of sending a steering projection on / off signal to the steering projection controller based on the projection steering differential component to adjust the projection working mode of each of the steering projection light sources includes: Detect whether the steering angle difference is greater than a preset steering angle difference; When the steering angle difference is greater than the preset steering angle difference, a right turn flowing projection start signal is sent to the steering projection controller.

5. The method for controlling the ground projection of a turn pattern based on a car projection lamp according to claim 4, characterized in that, The step of detecting whether the steering angle difference is greater than a preset steering angle difference further includes: When the steering angle difference is less than the preset steering angle difference, a left turn flowing projection start signal is sent to the steering projection controller.

6. The method for controlling the ground projection of a turn pattern based on a car projection lamp according to claim 4, characterized in that, The step of detecting whether the steering angle difference is greater than a preset steering angle difference further includes: When the steering angle difference is equal to the preset steering angle difference, a steering projection shutdown signal is sent to the steering projection controller.

7. The method for controlling the ground projection of a turn pattern based on a car projection lamp according to claim 1, characterized in that, The acquisition of steering motion state parameters from the steering sensor includes: Obtain the steering yaw acceleration from the steering sensor.

8. The method for controlling the ground projection of a turn pattern based on a car projection lamp according to claim 7, characterized in that, The step of performing differential processing on the steering motion state parameters and preset steering parameters to obtain the projected steering difference component includes: The difference between the steering yaw acceleration and the preset yaw acceleration is calculated to obtain the steering acceleration difference.

9. The method for controlling the ground projection of a turn pattern based on a car projection lamp according to claim 8, characterized in that, The step of sending a steering projection on / off signal to the steering projection controller based on the projection steering differential component to adjust the projection working mode of each of the steering projection light sources includes: Detect whether the steering acceleration difference is greater than a preset steering acceleration difference; When the steering acceleration difference is greater than the preset steering acceleration difference, a right turn flowing projection start signal is sent to the steering projection controller.

10. The method for controlling the ground projection of a turn pattern based on a car projection lamp according to claim 9, characterized in that, The step of detecting whether the steering acceleration difference is greater than a preset steering acceleration difference further includes: When the steering acceleration difference is less than the preset steering acceleration difference, a left turn flowing projection start signal is sent to the steering projection controller.

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