A control method and system for a pixel headlamp

Abstract

The application provides a control method and system of a pixel big lamp. A user selects a projection mode of the pixel big lamp through a human-computer interaction interface, the projection mode includes a wall projection mode, an intelligent low beam auxiliary mode and a rain and fog intelligent light mode, after selecting the mode, the pixel big lamp controller intelligently adjusts the projection of the pixel big lamp according to the corresponding projection mode, and after the adjustment, the intelligent scene projection is performed through the pixel big lamp. The application can effectively adjust the projection of the pixel big lamp according to different projection requirements, realize the intelligent control of the output image of the pixel big lamp, and effectively improve the experience of the user.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of control of vehicle pixel headlamps, and particularly to a control method and system of pixel headlamps. BACKGROUND

[0002] The vehicle-mounted intelligent pixel headlamps can realize high-definition video and picture playing, and have a strong sense of science and technology and fashion, and the application scenarios are rich in content. If the intelligent control display of the pixel headlamps can be realized, the upgrading of related industries will be inevitably promoted. At present, the control design of the pixel headlamps of some manufacturers mainly triggers the projection of related identification graphics by identifying some road traffic signs, unlocking information, starting state, vehicle information in front of the same lane, and lane changing information, which is a fixed pattern projection method and cannot be intelligently adjusted according to related scenarios. That is, the current vehicle-mounted pixel headlamps generally display fixed patterns and videos according to scene triggering, and users can only select and call stored scene video pictures or user-defined videos or pictures on the vehicle machine end, and the demand of users for intelligent control of the scene display of the pixel headlamps cannot be met. For example, for the current picture wall projection demand, the low-beam assistance demand in different vehicle postures, and the projection clarity demand in the rain and other poor visibility conditions, the pixel headlamps cannot be projected according to the fixed scenes set in advance, and the above-mentioned demands cannot be well adapted, and scenarios such as mismatched pictures, no low-beam assistance, and poor clarity may occur, resulting in poor user experience. SUMMARY

[0003] The present application provides a control method and system of pixel headlamps, which can effectively adjust the projection of the pixel headlamps according to different projection demands, realize intelligent control of the output images of the pixel headlamps, and effectively improve the intelligent experience of users for vehicles.

[0004] In order to achieve the above-mentioned purposes, the technical solutions adopted by the present application are as follows:

[0005] A control method of pixel headlamps, comprising the following processes:

[0006] A user selects a projection mode of the pixel headlamps through a human-computer interaction interface;

[0007] The projection mode includes a wall projection mode, an intelligent low-beam assistance mode, and a rain and fog intelligent light mode;

[0008] According to the selected projection mode, the human-computer interaction interface sends an opening instruction of a pixel headlamp intelligent scene to a pixel headlamp controller;

[0009] If it is the wall projection mode, the pixel big lamp controller identifies the image information of the required projected wall surface, judges whether the pixel big lamp scene opening condition is met, if yes, the corresponding scene animation is called and size adjusted, and finally the adjusted scene animation is projected to the wall surface by the pixel big lamp; otherwise, the pixel big lamp does not project;

[0010] If it is the intelligent low beam auxiliary mode, the pixel big lamp controller identifies the height difference between the front and rear of the vehicle, judges the attitude of the vehicle according to the height difference, and selects different light patterns for low beam assistance according to the attitude, and finally transmits the light pattern to the pixel big lamp for projection to the ground by the pixel big lamp.

[0011] If it is the rain and fog intelligent light mode, the pixel big lamp controller identifies the rainfall, adjusts the luminous flux of the current output scene animation according to the rainfall, and transmits the scene animation with adjusted luminous flux to the pixel big lamp for projection to the ground by the pixel big lamp.

[0012] In operation, the user selects the projection mode through the human-computer interaction interface, selects the mode, and then the human-computer interaction interface sends the pixel big lamp intelligent scene opening instruction in the corresponding mode to the pixel big lamp controller. The pixel big lamp controller receives the valid pixel big lamp intelligent scene opening signal, and then the pixel big lamp controller intelligently adjusts the projection process of the pixel big lamp according to the corresponding mode, and opens the pixel big lamp for intelligent scene projection after adjustment.

[0013] In the above scheme, the user only needs to set the projection mode through the human-computer interaction interface to open, so as to enjoy the high-definition pixel big lamp intelligent control experience with strong sense of technology, improve the user's sense of technology experience, and strengthen the user's recognition of the automobile brand.

[0014] Further, in the wall projection mode, the real-time image information of the wall in front of the vehicle is collected by the vehicle-mounted camera and transmitted to the pixel big lamp controller through Ethernet. The pixel big lamp controller judges whether the read image information meets the scene opening condition of the pixel big lamp. If yes, the pixel big lamp controller calls the corresponding scene animation and performs size adjustment, and then transmits the adjusted scene animation to the pixel big lamp through the FPD-LINK protocol. The pixel big lamp receives the scene animation and projects it onto the wall, finally completing the scene display.

[0015] Here, the wall information in front of the vehicle is collected in real time by the camera, which can help the pixel big lamp controller to quickly judge whether it meets the opening condition of the pixel big lamp for scene animation projection, and can improve the user's viewing experience.

[0016] Further, the image information read by the pixel big lamp controller includes the width-height ratio and reflectivity of the wall, and the opening condition is that whether the width-height ratio of the wall is greater than the set width-height ratio threshold and whether the reflectivity is greater than the set reflectivity threshold.

[0017] The opening condition described above can be set according to actual projection needs, and is not uniquely limited. The size of the wall and its projection effect can be determined in time through the width-height ratio and reflectivity of the wall, and if the standard is not met, projection is not performed, so as to intelligently identify the projection action of the user and avoid bringing bad viewing experience to the user.

[0018] Further, when the opening condition is met, the pixel big lamp controller adjusts the size of the scene animation as follows:

[0019] The vehicle-mounted radar detects the distance of the wall from the pixel big lamp, that is, the projection distance, and sends the projection distance to the pixel big lamp controller. The pixel big lamp controller determines the actual size of the wall, that is, the projection screen size, according to the image information of the projection wall. Since the projection distance = projection screen size x projection ratio, the projection ratio is obtained. The pixel big lamp controller adjusts the size of the scene animation projected onto the wall according to the calculated projection ratio.

[0020] When the condition is met, the size of the projected picture is adjusted according to the current size of the wall to improve the viewing experience of the user.

[0021] Further, if the size of the scene animation calculated according to the projection ratio is greater than the upper limit of the actual projection size of the scene animation, the size of the scene animation projected by the pixel big lamp at this time is the upper limit of the actual projection size.

[0022] Since the projection size of the pixel big lamp has a certain upper limit, when the current wall size is too large, that is, the maximum size that can be projected by the pixel big lamp is projected, the clarity of the projection is ensured, and the viewing experience of the user is improved.

[0023] When the wall is projected, whether the wall meets the projection requirements is determined according to the wall to be projected. If it is found that the wall size is small or the reflectivity is low, the user is warned that the wall is not suitable for projecting the scene animation to avoid a bad projection experience. If it can be projected, the size of the projected picture is adjusted accordingly to improve the viewing experience of the user.

[0024] The pixel big lamp controller of the present application intelligently adjusts the size of the output scene animation according to the size and reflectivity information of the front projection wall recognized by the camera to optimize the pixel big lamp projection entertainment experience and other intelligent technology experience.

[0025] Further, in the intelligent low beam auxiliary mode, the height difference H between the front and rear of the vehicle body is collected by the front and rear axle height sensors of the vehicle, and is transmitted to the pixel big lamp controller through Ethernet. At the same time, the front and rear wheelbase of the vehicle is set as L, so the change angle θ of the car relative to the horizontal plane is represented as:

[0026]

[0027]

[0028] Since L is a fixed value, the variation angle θ of the automobile relative to the horizontal plane can be obtained according to the height difference value H;

[0029] The variation angle θ is divided into two ranges, θ≤K and θ>K, and the value of K ranges from 5 to 15;

[0030] When θ≤K, the corresponding vehicle posture is a normal posture, and at this time, the pixel headlight controller selects a light pattern corresponding to the normal posture to assist the low beam, and transmits the current light pattern to the pixel headlight, which is projected to the ground;

[0031] When θ>K, the data collected by the front and rear axle height sensors of the vehicle is combined to determine whether the vehicle is in a downward posture or an upward posture;

[0032] If the value of the front axle height sensor of the vehicle is greater than the value of the rear axle height sensor, it is determined that the vehicle is in an upward posture, and at this time, the pixel headlight controller selects a light pattern corresponding to the upward posture to assist the low beam, and transmits the current light pattern to the pixel headlight, which is projected to the ground;

[0033] If the value of the front axle height sensor of the vehicle is less than the value of the rear axle height sensor, it is determined that the vehicle is in a downward posture, and at this time, the pixel headlight controller selects a light pattern corresponding to the downward posture to assist the low beam, and transmits the current light pattern to the pixel headlight, which is projected to the ground.

[0034] Further, the light patterns corresponding to the normal posture, the upward posture and the downward posture of the vehicle are set in advance in the pixel headlight controller, and the set light patterns are used to adjust the range of the low beam auxiliary illumination area projected on the ground by the pixel headlight under different postures of the vehicle.

[0035] The present application adjusts the range of the low beam auxiliary illumination area projected on the ground by the pixel headlight controller to achieve the best lighting effect through the real-time output of the height difference signal of the front and rear height sensors arranged on the whole vehicle.

[0036] Further, in the rain and fog intelligent light mode, the rain value of the current weather is collected by the rain sensor on the vehicle, and is transmitted to the pixel headlight controller through Ethernet, and the pixel headlight controller adjusts the luminous flux of the current output scene animation according to the rain value, and the adjustment process is as follows:

[0037] If the rain value is less than or equal to the rain threshold value, the pixel headlight controller directly controls the pixel headlight to project the scene animation, and at this time, the luminous flux of the projected scene animation is the basic value P;

[0038] If the rainfall value is greater than the rainfall threshold value, the pixel headlamp controller increases the light flux of the scene animation to be projected, and on the basis of the rainfall threshold value, the output light flux is increased or decreased by E for each increase or decrease of G rainfall, until the light flux is adjusted to the maximum output P max Or the base value P, after adjusting the light flux, the pixel headlamp controller controls the pixel headlamp to project the scene animation.

[0039] The present application realizes the intelligent balance of the vehicle power consumption and the road lighting by adjusting the light intensity of the pixel headlamp to be projected in front of the vehicle according to the real-time rainfall signal value output by the high-precision rainfall sensor arranged on the vehicle.

[0040] Further, the human-computer interaction interface includes a central control display screen or a mobile terminal APP.

[0041] The present application also provides a pixel headlamp control system for realizing the pixel headlamp control method as described above, which comprises:

[0042] A control interface for allowing a user to select a projection mode of the pixel headlamp through human-computer interaction and issuing an opening instruction of a corresponding intelligent scene according to the selected projection mode;

[0043] A camera for collecting real-time image information in front of the vehicle;

[0044] A front axle height sensor and a rear axle height sensor for collecting the front axle height and the rear axle height of the vehicle to obtain a height difference between the front and rear of the vehicle body;

[0045] A rainfall sensor for collecting a real-time rainfall value of the current weather;

[0046] A pixel headlamp controller for receiving the intelligent scene opening instruction from the control interface and adjusting a scene to be output under the corresponding projection mode according to the real-time image information in front of the vehicle, the height difference between the front and rear of the vehicle body, and the rainfall outside the vehicle, so as to control the projection of the pixel headlamp.

[0047] The present application has the following advantages:

[0048] The present application allows the user to select a mode first, and then the pixel headlamp controller identifies the mode selected by the user, wherein the identification is based on three kinds of information, i.e., the image information of the front projection wall surface, the height difference signal of the front and rear axles of the vehicle, and the rainfall information outside the vehicle, each kind of information corresponding to three projection modes, the pixel headlamp controller selects the corresponding information according to the mode selected by the user to intelligently control the pixel headlamp, so as to solve the user's demand for projecting the picture on the wall, the user's demand for the low beam assistance in different vehicle postures, and the user's demand for the projection clarity in the rainy day and the like, thereby improving the user's experience of the vehicle intelligence. Attached Figure Description

[0049] Figure 1 This is a flowchart illustrating a pixel headlight control method according to the present invention;

[0050] Figure 2 This is a schematic diagram of the control principle in wall projection mode;

[0051] Figure 3 This is a schematic diagram illustrating the control principle in intelligent low beam assist mode;

[0052] Figure 4 A schematic diagram illustrating the control principle of the intelligent lighting mode for rain and fog.

[0053] Figure 5 This is a schematic diagram of the control system for a pixel headlight according to the present invention. Detailed Implementation

[0054] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0055] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0056] Example 1:

[0057] like Figures 1-4 As shown, this embodiment provides a method for controlling pixel headlights, including the following process:

[0058] Users select the projection mode of the pixel headlights through the human-computer interaction interface;

[0059] The projection modes include wall projection mode, intelligent low beam assist mode, and rain / fog intelligent lighting mode;

[0060] Based on the selected projection mode, the human-computer interaction interface sends the activation command of the pixel headlight smart scene to the pixel headlight controller.

[0061] If it is the wall projection mode, the pixel big lamp controller identifies the image information of the required projected wall surface, judges whether the scene opening condition of the pixel big lamp is met, if yes, the corresponding scene animation is called and size adjusted, and finally the adjusted scene animation is projected to the wall surface by the pixel big lamp; otherwise, the pixel big lamp does not project;

[0062] If it is the intelligent low beam auxiliary mode, the pixel big lamp controller identifies the height difference between the front and rear of the vehicle, judges the attitude of the vehicle according to the height difference, selects different light patterns for low beam assistance according to the attitude, and finally transmits the light pattern to the pixel big lamp for projection to the ground by the pixel big lamp;

[0063] If it is the rain and fog intelligent light mode, the pixel big lamp controller identifies the rainfall, adjusts the luminous flux of the current output scene animation according to the rainfall, transmits the scene animation with adjusted luminous flux to the pixel big lamp, and finally projects to the ground by the pixel big lamp.

[0064] In operation, the user selects the projection mode through the human-computer interaction interface, selects the mode, and then the human-computer interaction interface sends the pixel big lamp intelligent scene opening instruction in the corresponding mode to the pixel big lamp controller. The pixel big lamp controller receives the valid pixel big lamp intelligent scene opening signal, and then the pixel big lamp controller intelligently adjusts the projection process of the pixel big lamp according to the corresponding mode, and opens the pixel big lamp for intelligent scene projection after adjustment.

[0065] In the above scheme, the user only needs to set the projection mode through the human-computer interaction interface to open, and can enjoy the high-definition pixel big lamp intelligent control experience with strong sense of technology, improve the user's sense of technology experience, and strengthen the user's recognition of the automobile brand.

[0066] Referring to Figure 2 In this embodiment, in the wall projection mode, the real-time image information of the wall in front of the vehicle is collected by the vehicle-mounted camera and transmitted to the pixel big lamp controller through Ethernet. The pixel big lamp controller reads the image information, reads the width-height ratio and reflectivity of the wall, and judges whether the width-height ratio is greater than the set width-height ratio threshold and whether the reflectivity is greater than the set reflectivity threshold to verify whether the current wall meets the scene opening of the pixel big lamp. If yes, the pixel big lamp controller calls the corresponding scene animation and transmits it to the pixel big lamp through the FPD-LINK protocol. The pixel big lamp projects the scene animation onto the wall after receiving the scene animation, and finally completes the scene display.

[0067] The contrast criteria of the wall height-width ratio and reflectivity in the opening condition can be set according to actual projection needs, and is not limited to only one, and in the embodiment, the height-width ratio threshold is 1:2, and the reflectivity threshold is 50%. The size of the wall and the projection effect thereof can be determined in time by the height-width ratio and reflectivity of the wall, and if the criteria are not met, the projection is not performed, so that the projection action of the user is intelligently recognized, and the user is prevented from having a bad viewing experience.

[0068] When the opening condition is met, the pixel big lamp controller adjusts the size of the scene animation as follows:

[0069] The vehicle-mounted radar detects the distance of the wall from the pixel big lamp, that is, the projection distance, and sends the projection distance to the pixel big lamp controller, the pixel big lamp controller determines the actual size of the wall, that is, the projection screen size, according to the image information of the projection wall, and since the projection distance = projection screen size x projection ratio, the projection ratio is obtained, and the pixel big lamp controller adjusts the size of the scene animation projected onto the wall according to the calculated projection ratio. The size of the picture projected onto the wall is adjusted according to the current size of the wall when the condition is met, so as to improve the viewing experience of the user.

[0070] Since the projection size of the pixel big lamp has an upper limit, if the size of the scene animation calculated according to the projection ratio is greater than the upper limit of the actually projected scene animation, it indicates that the current wall size is sufficient, and the size of the scene animation projected by the pixel big lamp is the upper limit of the actually projected size, that is, the maximum size that can be projected by the pixel big lamp is projected, which not only ensures the clarity of the projection, but also improves the viewing experience of the user.

[0071] When the wall is projected, whether the wall meets the projection requirements is determined according to the wall to be projected, if it is found that the wall size is small or the reflectivity is low, the user is warned that the wall is not suitable for projection animation or video, so as to avoid a bad projection experience, if it can be projected, the size of the projected picture is adjusted according to the wall, so as to improve the viewing experience of the user.

[0072] The pixel big lamp controller of the present application intelligently adjusts the size of the output scene animation according to the size and reflectivity information of the front projection wall recognized by the camera, so as to optimize the pixel big lamp projection entertainment experience and other intelligent technology experience.

[0073] Referring to Figure 3 In the embodiment, in the intelligent low beam auxiliary mode, the height difference H between the front and rear of the vehicle body is collected by the front and rear axle height sensors of the vehicle, and is transmitted to the pixel big lamp controller through Ethernet, and the front and rear wheelbase of the vehicle is set as L, so the change angle θ of the automobile relative to the horizontal plane is represented as:

[0074]

[0075]

[0076] Since L is a fixed value, the variation angle θ of the vehicle relative to the horizontal plane can be obtained according to the height difference value H;

[0077] The variation angle θ is divided into two ranges, θ≤K and θ>K, and the value of K ranges from 5 to 15, and in the embodiment, K=10;

[0078] When θ≤10, the corresponding vehicle posture is a normal posture, and at this time, the pixel headlight controller selects a light pattern corresponding to the normal posture for low-beam assistance, and transmits the current light pattern to the pixel headlight for projection onto the ground;

[0079] When θ>10, the data collected by the front and rear axle height sensors of the vehicle is combined to determine whether the vehicle is in a downward posture or an upward posture;

[0080] If the value of the front axle height sensor of the vehicle is greater than that of the rear axle height sensor, it is determined that the vehicle is in an upward posture, and at this time, the pixel headlight controller selects a light pattern corresponding to the upward posture for low-beam assistance, and transmits the current light pattern to the pixel headlight for projection onto the ground;

[0081] If the value of the front axle height sensor of the vehicle is less than that of the rear axle height sensor, it is determined that the vehicle is in a downward posture, and at this time, the pixel headlight controller selects a light pattern corresponding to the downward posture for low-beam assistance, and transmits the current light pattern to the pixel headlight for projection onto the ground.

[0082] The light patterns corresponding to the normal posture, the upward posture and the downward posture of the vehicle are set in advance in the pixel headlight controller, and the set light patterns are used to adjust the range of the low-beam assistance illumination area projected on the ground by the pixel headlight under different postures of the vehicle.

[0083] In the embodiment, the light pattern refers to the shape of the projected light, and the two pixel headlights of the vehicle project light at the same time, mapping different shapes of patterns on the ground. The shape and angle of the mapped pattern are different according to the different postures of the vehicle, and the purpose is to always display the projected light on the ground without deformation, so as to perform low-beam assistance illumination on the vehicle and improve the clarity of the light pattern projected by the pixel headlight under different postures of the vehicle, so as to facilitate the driver to observe more clearly and improve the experience.

[0084] The present application uses the height difference signals of the front and rear height sensors output in real time by the front and rear height sensors arranged on the whole vehicle, and the pixel headlight controller intelligently adjusts the range of the low-beam assistance illumination area projected on the ground to achieve the best lighting effect.

[0085] Referring to Figure 4 In the present embodiment, in the rain and fog intelligent light mode, the current weather rainfall value is collected by the vehicle-mounted rainfall sensor, and is transmitted to the pixel headlamp controller through Ethernet. The pixel headlamp controller adjusts the light flux of the current output scene animation according to the rainfall value. The adjustment process is as follows:

[0086] The rainfall threshold is set to 50 mm, the basic value of the light flux P = 400 LM, G = 10 mm, E = 200 LM, P max = 2000 LM;

[0087] If the rainfall value is less than or equal to 50 mm, the pixel headlamp controller directly controls the pixel headlamp to project the scene animation, and does not perform the scene adjustment action. At this time, the light flux of the projected scene animation is the basic value of 400 LM;

[0088] If the rainfall value is greater than 50 mm, the pixel headlamp controller increases the light flux of the scene animation to be projected. On the basis of 50 mm of rainfall, for every increase or decrease of 10 mm of rainfall, the output light flux is increased or decreased by 200 LM, until the light flux is adjusted to the maximum output of 2000 LM or the basic value of 400 LM. After the light flux is adjusted, the pixel headlamp controller controls the pixel headlamp to project the scene animation.

[0089] In the present embodiment, the maximum output of the light flux is set to 2000 LM, that is, the adjustment range of the light flux of the currently output scene animation by the pixel headlamp controller is 400 LM to 2000 LM.

[0090] In the present embodiment, when the rainfall value is greater than 50 mm, it is assumed that the current rainfall is 60 mm, that is, the light flux of the output scene animation is 600 LM. When the rainfall reaches 70 mm, the light flux continues to increase by 200 LM to 800 LM. In this way, if the rainfall continues to increase, the light flux is adjusted to a maximum of 2000 LM. Even if the rainfall continues to increase, the light flux can only be output at 2000 LM. Similarly, if the rainfall decreases from 70 mm to 60 mm, the light flux decreases from 800 LM to 600 LM. When the rainfall continues to decrease to less than 50 mm, the light flux decreases from 600 LM to the basic value of 400 LM. Even if the subsequent rainfall continues to decrease to zero, the light flux remains at the basic value of 400 LM for output.

[0091] The present application realizes the intelligent balance of the vehicle power consumption and the road lighting by outputting the real-time rainfall signal value of the high-precision rainfall sensor arranged on the whole vehicle, and intelligently adjusting the light intensity of the light projected to the front near area of the vehicle by the pixel headlamp controller to realize the adaptive adjustment of the lighting.

[0092] In the present embodiment, the above P, G, E and P maxThe values of the above parameters can be set according to actual conditions, and the above embodiment is only a preferred setting and is not the only limitation.

[0093] In the embodiment, the human-computer interaction interface includes a central control display screen or a mobile terminal APP. The related functions can be set in the central control display screen of the vehicle to select the projection mode, or the APP can be set on the mobile terminal (mobile phone or tablet) to select the projection mode, so that the user can enjoy the high-tech high-pixel headlamp intelligent control experience through simple operation, improve the user's sense of technology experience, and strengthen the user's recognition of the automobile brand.

[0094] As shown in Figure 5 The application also provides a pixel headlamp control system for implementing the pixel headlamp control method, which comprises:

[0095] A control interface for the user to select the projection mode of the pixel headlamp through human-computer interaction and send an opening instruction of the corresponding intelligent scene according to the selected projection mode;

[0096] A camera for collecting real-time image information in front of the vehicle;

[0097] A front axle height sensor and a rear axle height sensor for collecting the front axle height and the rear axle height of the vehicle to obtain the height difference between the front and rear of the vehicle body;

[0098] A rain sensor for collecting the real-time value of the current weather rainfall;

[0099] A pixel headlamp controller for receiving the intelligent scene opening instruction from the control interface and adjusting the intelligent scene to be output under the corresponding projection mode according to the real-time image information in front of the vehicle, the height difference between the front and rear of the vehicle body, and the rainfall outside the vehicle, so as to control the projection of the pixel headlamp, wherein the pixel headlamp controller is a domain controller based on an operating system.

[0100] The application selects the mode by the user first, and then the pixel headlamp controller identifies the mode selected by the user, wherein the identification basis includes the image information of the front projection wall surface, the height difference signal of the front and rear axles of the vehicle, and the rainfall information outside the vehicle, each basis corresponds to three projection modes, the pixel headlamp controller selects the corresponding basis to intelligently control the pixel headlamp according to the mode selected by the user, so as to solve the user's demand for projecting the picture on the wall, the user's demand for low beam assistance in different vehicle postures, and the user's demand for clear projection in poor visibility such as rainy days, so as to improve the user's experience of the intelligence of the vehicle.

[0101] The above embodiments are only the preferred embodiments of the present application for fully illustrating the present application, and the protection scope of the present application is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art based on the present application are within the protection scope of the present application.

Claims

1. A control method of a pixel headlamp, characterized by, The process comprises the following steps: A user selects a projection mode of a pixel big light through a human-computer interaction interface; The projection mode comprises a wall projection mode, an intelligent low-beam auxiliary mode, and a rain and fog intelligent light mode; According to the selected projection mode, the human-computer interaction interface sends an opening instruction of a pixel big light intelligent scene to a pixel big light controller; If the wall projection mode is selected, the pixel big light controller identifies image information of a required projection wall surface, judges whether the scene opening condition of the pixel big light is met, and if yes, calls a corresponding scene animation and performs size adjustment, and finally projects the adjusted scene animation to the wall surface through the pixel big light; otherwise, the pixel big light does not project; If the intelligent low-beam auxiliary mode is selected, the pixel big light controller identifies the height difference between the front and rear of the vehicle, judges the attitude of the vehicle according to the height difference, selects different light patterns for low-beam assistance according to the attitude, and finally transmits the light pattern to the pixel big light for projection to the ground; If the rain and fog intelligent light mode is selected, the pixel big light controller identifies the rainfall, adjusts the luminous flux of the current output scene animation according to the rainfall, and transmits the scene animation with the adjusted luminous flux to the pixel big light for projection to the ground; In the wall projection mode, a real-time image information of a wall surface in front of the vehicle is collected through a vehicle-mounted camera and transmitted to the pixel big light controller through Ethernet, the pixel big light controller judges whether the read image information meets the scene opening condition of the pixel big light, if yes, the pixel big light controller calls a corresponding scene animation and performs size adjustment, and then transmits the adjusted scene animation to the pixel big light through the FPD-LINK protocol, the pixel big light receives the scene animation and projects it onto the wall surface, and finally completes the scene display; The image information read by the pixel big light controller includes the width-height ratio and reflectivity of the wall surface, and the opening condition is that whether the width-height ratio of the wall surface is greater than a set width-height ratio threshold and whether the reflectivity is greater than a set reflectivity threshold.

2. The control method of a pixel headlamp according to claim 1, characterized in that, When the opening condition is met, the pixel big light controller adjusts the size of the scene animation as follows: The vehicle-mounted radar detects the distance between the wall surface and the pixel big light, i.e. the projection distance, and transmits the projection distance to the pixel big light controller, the pixel big light controller determines the size of the actual wall surface, i.e. the projection screen size, according to the image information of the projection wall surface, and since the projection distance = projection screen size x projection ratio, the projection ratio is obtained, and the pixel big light controller adjusts the size of the scene animation projected to the wall surface according to the calculated projection ratio.

3. The control method of a pixel headlamp according to claim 2, characterized in that, If the size of the scene animation calculated according to the projection ratio is greater than the upper limit of the actual projection size, the size of the scene animation projected by the pixel big light is the upper limit of the actual projection size.

4. The control method of a pixel headlamp according to claim 1, characterized by, In the intelligent low-beam auxiliary mode, the height difference H between the front and rear of the vehicle is collected through the front and rear axle height sensors of the vehicle and transmitted to the pixel big light controller through Ethernet, and the vehicle front and rear wheelbase L is set, so the variation angle θ of the vehicle relative to the horizontal plane is represented as: Since L is a fixed value, the variation angle θ of the vehicle relative to the horizontal plane can be obtained according to the height difference H; The variation angle θ is divided into two ranges, θ≤K and θ>K, and the value of K ranges from 5 to 15. When θ≤K, the corresponding vehicle posture is normal posture, at this time the pixel headlight controller selects the light pattern corresponding to the normal posture for low beam assistance, and transmits the current light pattern to the pixel headlight, which is projected to the ground; When θ>K, the vehicle is in a downward or upward posture in combination with the data collected by the front and rear axle height sensors of the vehicle; If the front axle height sensor value of the vehicle is greater than the rear axle height sensor value, it is judged that the vehicle is in an upward posture, at this time the pixel headlight controller selects the light pattern corresponding to the upward posture for low beam assistance, and transmits the current light pattern to the pixel headlight, which is projected to the ground; If the front axle height sensor value of the vehicle is less than the rear axle height sensor value, it is judged that the vehicle is in a downward posture, at this time the pixel headlight controller selects the light pattern corresponding to the downward posture for low beam assistance, and transmits the current light pattern to the pixel headlight, which is projected to the ground.

5. The control method of a pixel headlamp according to claim 4, characterized in that, The light patterns corresponding to the normal posture, upward posture and downward posture of the vehicle are set in advance in the pixel headlight controller. The set light patterns are to adjust the low beam assistance illumination area range on the ground projected by the pixel headlight under different postures of the vehicle.

6. The control method of a pixel headlamp according to claim 1, characterized by, In the rain and fog intelligent light mode, the current weather rainfall value is collected by the vehicle-mounted rainfall sensor and transmitted to the pixel headlight controller through Ethernet. The pixel headlight controller adjusts the luminous flux of the current output scene animation according to the rainfall value. The adjustment process is as follows: If the rainfall value≤rainfall threshold, the pixel headlight controller directly controls the pixel headlight to project the scene animation, at this time the luminous flux of the projected scene animation is the basic value P; If the rainfall value > rainfall threshold, the pixel headlight controller increases the luminous flux of the projected scene animation, and on the basis of the rainfall threshold, the output luminous flux is increased or decreased by E for each increase or decrease of G rainfall, until the luminous flux is adjusted to the maximum output P max Or the basic value P, after adjusting the luminous flux, the pixel headlight controller controls the pixel headlight to project the scene animation.

7. The control method of a pixel headlamp according to claim 1, characterized by, The human-computer interaction interface includes a central control display screen or a mobile terminal APP.

8. A control system of a pixel headlamp for implementing the control method of the pixel headlamp according to any one of claims 1 to 7, characterized in that, It includes: The control interface provides the user with a selection of pixel headlight projection modes through human-computer interaction, and sends an opening instruction of the corresponding intelligent scene according to the selected projection mode; The camera is used to collect real-time image information in front of the vehicle; The front axle height sensor and the rear axle height sensor are used to collect the front axle height and the rear axle height of the vehicle to obtain the height difference between the front and rear of the vehicle body; The rainfall sensor is used to collect the real-time value of the current weather rainfall; The pixel headlight controller receives the intelligent scene opening instruction from the control interface, and adjusts the scene to be output under the corresponding projection mode according to the real-time image information in front of the vehicle, the height difference between the front and rear of the vehicle body, and the rainfall outside the vehicle, to control the projection of the pixel headlight.

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