A method, device and system for adjusting the grayscale of a glare-free high beam

Abstract

The application discloses a kind of anti-dazzling high beam LED gray scale adjusting method, device and system, belong to anti-dazzling high beam control technical field.It includes obtaining the coordinate information of target object in front of vehicle, and the coordinate information of target object in front is processed by tangent operation, obtains lighting signal;According to lighting signal, the PWM value of corresponding channel output of matrix lighting chip is configured, to realize stepless control to matrix lighting chip;Wherein, in the process of stepless control to matrix lighting chip, the ambient illuminance is acquired, and the precision of stepless dimming is calibrated by CCP protocol with ambient illuminance as target value.It can realize more uniform irradiation effect, better illumination field of view, more stable anti-dazzling high beam control under the condition of having equivalent LED quantity;Solve the problem that the angle of existing shielding area is not accurate, and other smaller traffic participants in the shielding area may be shielded.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of anti-dazzling high beam control technology, in particular to an anti-dazzling high beam LED gray scale adjusting method, device and system. BACKGROUND

[0002] The statements in this section merely provide background information related to the present application and do not necessarily constitute the prior art.

[0003] The existing anti-dazzling high beam solutions include automatic high beam, mechanical anti-dazzling high beam and matrix anti-dazzling high beam.

[0004] The automatic high beam is to detect other traffic participants by the vehicle-mounted front-view camera during the use of high beam, classify according to the characteristics, and then make logical judgment according to the environmental light and vehicle speed, etc. Finally, a high beam closing request is sent out, and the high beam channel power supply is closed by the vehicle body controller to achieve anti-dazzling. The disadvantage of this solution is that in the multi-target scene, the high beam will be frequently turned on and off, and the driver of the vehicle cannot obtain a better lighting field of view.

[0005] The mechanical anti-dazzling high beam is to collect the front view by the camera installed in the front of the windshield during the use of high beam, and to perform real-time image processing on the front view. When following, meeting and passing various traffic signs, the light axis in the lamp body is constantly rotated to change the light pattern and then realize different degrees of light shielding to complete the anti-dazzling requirement. The disadvantage of this solution is that the light changes relatively slowly, which is difficult to meet the needs of fast driving. At the same time, due to the limitation of the mechanical precision of the variable light axis, the shielding light pattern is fixed, and the shielding precision is not high, which is only suitable for single target in simple road conditions.

[0006] The matrix anti-dazzling high beam is to collect the front view by the camera installed in the front of the windshield during the use of high beam, and to perform real-time image processing on the front view. According to the controller instruction, the light pattern change is completed by controlling the brightness of a single LED, and through different light distribution patterns, the functions such as following turning, precise lighting, controlling the irradiation range, dynamic turning light, and headlight reminding pedestrians can be realized to improve the safety of night driving. This solution has significant advantages in response speed and light effect, but its fineness and flexibility depend on a large number of light sources. The more the number of LEDs is, the higher the resolution and precision of the adaptive high beam system are. However, the large number of light sources puts higher requirements on the optical system design, and too many light sources bring great challenges to the system heat dissipation structure and control algorithm strategy. SUMMARY

[0007] In order to solve the problems in the prior art, the application provides a LED gray scale adjustment method, device and system for anti-dazzling high beam, an electronic device and a computer readable storage medium, which can realize more uniform irradiation effect, better illumination field of view and more stable anti-dazzling high beam control under the condition of having the same number of LEDs.

[0008] In a first aspect, the application provides a LED gray scale adjustment method for anti-dazzling high beam.

[0009] The LED gray scale adjustment method for anti-dazzling high beam comprises the following steps.

[0010] Coordinate information of a target object in front of a vehicle is acquired, and the coordinate information of the target object in front is processed through tangent operation to acquire a lighting signal.

[0011] According to the lighting signal, a PWM value output by a matrix lighting chip corresponding to a channel is configured to realize stepless control of the matrix lighting chip.

[0012] In the stepless control of the matrix lighting chip, the ambient light intensity is acquired, the ambient light intensity is taken as a target value, and the precision of stepless dimming is calibrated through a CCP protocol.

[0013] Further, the processing of the coordinate information of the target object in front through tangent operation specifically comprises the following steps.

[0014] The lateral distance from the camera to the target vehicle is determined through tangent calculation, and the lateral distance and the longitudinal distance from the vehicle lamp to the target vehicle are acquired according to the distance between the vehicle lamp and the camera and in combination with the lateral distance from the camera to the target vehicle.

[0015] Further, the calibration of the precision of stepless dimming through the CCP protocol with the ambient light intensity as the target value specifically comprises the following steps.

[0016] The PWM value output by the matrix lighting chip corresponding to the channel is processed through a calibration tool to acquire an LED gray scale adjustment effect, and the PWM value output by the matrix lighting chip corresponding to the channel is updated in real time according to the LED gray scale adjustment effect.

[0017] Further, before the image information of the target object in front of the vehicle is acquired, the following steps are further included.

[0018] Vehicle speed information, ambient light intensity information and light control gear information of the vehicle are acquired, the vehicle speed information, the ambient light intensity information and the light control gear information are compared with preset threshold values, and it is determined whether the conditions for stepless dimming are met.

[0019] Further, the coordinate information of the target object in front of the vehicle includes a target object category, a longitudinal distance, and a left boundary angle relative to a front-view camera coordinate center or a right boundary angle relative to the front-view camera coordinate center.

[0020] Further, the coordinate information of the target object in front of the vehicle is obtained by capturing image information of the target object in front of the vehicle by a front-view camera of the vehicle and processing the image information.

[0021] In a second aspect, the present application provides a LED gray scale adjustment device for anti-dazzling high beam.

[0022] A LED gray scale adjustment device for anti-dazzling high beam comprises:

[0023] A lighting signal acquisition module is configured to: acquire image information of a target object in front of a vehicle; acquire coordinate information of the target object in front of the vehicle according to the image information, and process the coordinate information of the target object in front of the vehicle by tangent operation to acquire a lighting signal.

[0024] A stepless control module is configured to: configure PWM values of channel outputs of a matrix lighting chip according to the lighting signal to realize stepless control of the matrix lighting chip.

[0025] In the process of stepless control of the matrix lighting chip, an ambient illuminance is acquired, and the precision of stepless dimming is calibrated with the ambient illuminance as a target value.

[0026] In a third aspect, the present application provides a LED gray scale adjustment system for anti-dazzling high beam.

[0027] A LED gray scale adjustment system for anti-dazzling high beam comprises a control unit, a linear matrix chip and a LED light source based on the above-mentioned LED gray scale adjustment method for anti-dazzling high beam.

[0028] The control unit is in communication connection with the linear matrix chip, and the linear matrix chip is in electrical connection with the LED light source.

[0029] In a fourth aspect, the present application provides an electronic device.

[0030] An electronic device comprises a memory and a processor, and computer instructions stored in the memory and running on the processor, when the computer instructions are run by the processor, the steps of the above-mentioned LED gray scale adjustment method for anti-dazzling high beam are completed.

[0031] In a fifth aspect, the present application provides a computer readable storage medium.

[0032] A computer readable storage medium for storing computer instructions, which, when executed by a processor, complete the steps of the LED gray scale adjustment method of the anti-dazzling high beam.

[0033] Compared with the prior art, the present application has the following beneficial effects:

[0034] 1、The technical scheme provided by the present application can realize stepless adjustment of the illumination brightness of the anti-dazzling area, automatic change of the light type through gray scale adjustment of the corresponding numbered LED, switching of the anti-dazzling mode in different scenes, more accurate anti-dazzling, automatic compensation according to the ambient road lighting, and solving of the problems of the current prior art, such as the turning blind area, the inaccurate angle of the normal shielding area, the possibility of shielding of other small traffic participants in the shielding area, and the traffic accidents caused by the visual blind area of the driver of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0035] The accompanying drawings, which form a part of this specification, are included to provide a further understanding of the present application, and are incorporated into and constitute a part of this specification. The embodiments of these drawings are set forth to explain the present application and are not intended to limit the present application in any way.

[0036] Figure 1 The system architecture schematic diagram provided for the embodiments of the present application;

[0037] Figure 2 The flowchart schematic diagram provided for the embodiments of the present application;

[0038] Figure 3 The example diagram of the light-on signal calculation provided for the embodiments of the present application. DETAILED DESCRIPTION

[0039] It should be noted that the following detailed description is merely exemplary in nature and is intended to provide further description of the present application. 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 application belongs.

[0040] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0041] In the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0042] Embodiment one

[0043] Next, combined with Figures 1-3 The LED gray scale adjustment method for anti-dazzling high beam disclosed in the present embodiment is described in detail. The LED gray scale adjustment method for anti-dazzling high beam comprises the following steps:

[0044] S1, obtaining coordinate information of a target object in front of a vehicle, wherein the coordinate information of the target object in front of the vehicle comprises a target object category, a left or right boundary included angle relative to a camera coordinate center, and a longitudinal distance.

[0045] Specifically, the image information of the target object in front of the vehicle is captured by the front-view camera of the intelligent driving vehicle and processed to obtain the coordinate information of the target object in front of the vehicle, which is transmitted to the MCU through the CAN bus.

[0046] And this is the existing function of the front-view camera of the intelligent driving vehicle, and the present embodiment does not improve it, which will not be described here.

[0047] S2, processing the coordinate information of the target object in front by tangent operation to obtain a lighting signal.

[0048] Specifically, the processing of the coordinate information of the target object in front by tangent operation is specifically:

[0049] Through tangent calculation, the lateral distance from the camera to the target vehicle is determined; according to the distance between the vehicle lamp and the camera, combined with the lateral distance from the camera to the target vehicle, the lateral distance and the longitudinal distance from the vehicle lamp to the target vehicle are obtained.

[0050] Exemplarily, combined with Figure 3 Taking the left lamp as an example, the specific process of obtaining the lighting signal is described in detail:

[0051] The lateral distance from the vehicle camera to the leftmost position S1 of the target vehicle position is represented as:

[0052] Dist_IFC_hor_S1=tan(LeAng)*Distance_S1;

[0053] Wherein, Distance_S1 is the longitudinal distance between the camera and S1, and LeAng is the included angle between the line connecting the camera and S1 and the longitudinal direction (IFC horizontal left angle).

[0054] The lateral distance from the vehicle camera to the rightmost position S3 of the target vehicle is represented as:

[0055] Dist_IFC_hor_S3 = tan(RiAng) * Distance_S3;

[0056] where Distance_S3 is the longitudinal distance between camera and S3, RiAng is the angle between the line connecting the camera and S4 and the longitudinal direction (IFC horizontal right angle).

[0057] Therefore, the horizontal distance between the left headlight and the target vehicle S1 is represented as:

[0058] Dist_LampLe_hor_S1 = Dist_IFC_hor_S1 + Dist_IFC_hor_L

[0059] where Dist_IFC_hor_L is the horizontal distance between the left headlight and the camera.

[0060] The horizontal distance between the left headlight and the target vehicle S3 is represented as:

[0061] Dist_LampLe_hor_S3 = Dist_IFC_hor_S3 + Dist_IFC_hor_L

[0062] Further, the longitudinal distance between the left headlight and the target vehicle S1 is represented as:

[0063] Dist_LampLe_ver_S1 = Distance_S1 + Dist_delay_S1 - Dist_IFC

[0064] The longitudinal distance between the left headlight and the target vehicle S3 is represented as:

[0065] Dist_LampLe_ver_S3 = Distance_S3 + Dist_delay_S3 - Dist_IFC_ver + CL

[0066] Therefore, we can obtain:

[0067] tan(aleft_headlight_l) = Dist_LampLe_hor_S1 / Dist_LampLe_ver_S1

[0068] tan(aleft_headlight_r) = Dist_LampLe_hor_S3 / Dist_LampLe_ver_S3

[0069] Wherein, aleft_headlight_l is the angle between the left headlight and S1 line and the longitudinal direction, and aleft_headlight_r is the angle between the left headlight and S4 line and the longitudinal direction, so as to determine the area where the LED light needs to be turned on.

[0070] S3, according to the lighting signal, configure the PWM value of the matrix lighting chip corresponding to the channel output to realize stepless control of the matrix lighting chip.

[0071] Further, in the process of stepless control of the matrix lighting chip, the ambient light intensity is obtained, and the ambient light intensity is taken as the target value, and the precision of stepless dimming is calibrated through the CCP protocol.

[0072] Specifically, the ambient light intensity is collected by the rain light sensor, the PWM value of the matrix lighting chip corresponding to the channel output is processed by the calibration tool, the LED gray scale adjustment effect is obtained, and the PWM value of the matrix lighting chip corresponding to the channel output is manually updated in real time according to the LED gray scale adjustment effect and the ambient light intensity until the effect is optimal.

[0073] Illustratively, a new calibration project is created with canape calibration tool, and then the.MAP file is imported to generate.A2L file, the memory address of the required variable in the map file is read, the latest address is updated to the a2l file, and then the ECU is connected and switched to the calibration quantity page, and the calibration parameters (the value of the gray scale of the specific light source) are modified in real time according to the effect evaluation to optimize the effect.

[0074] Further, before obtaining the image information of the target object in front of the vehicle, it further comprises:

[0075] The speed information, ambient light intensity information and light control gear information of the vehicle are obtained, and the speed information, ambient light intensity information and light control gear information are compared with the preset threshold to determine whether the condition of stepless dimming is met.

[0076] Illustratively, at night, the vehicle speed is greater than 60km, the light control gear is in automatic gear, there is an effective target object (vehicle such as car and truck, headlight and taillight are on) in front of the vehicle, and the stepless dimming is started.

[0077] Embodiment two

[0078] The embodiment discloses a LED gray scale adjustment device for anti-dazzling high beam, comprising:

[0079] The lighting signal acquisition module is configured to obtain the coordinate information of the target object in front of the vehicle, and process the coordinate information of the target object in front by tangent operation to obtain the lighting signal.

[0080] The stepless control module is configured to configure the PWM value of the channel output of the matrix light-up chip according to the light-up signal, so as to realize stepless control of the matrix light-up chip.

[0081] In the stepless control of the matrix light-up chip, the ambient light intensity is acquired, and the precision of the stepless dimming is calibrated with the ambient light intensity as a target value.

[0082] It should be noted that the light-up signal acquisition module and the stepless control module correspond to the steps in Embodiment One, and the modules and the examples and application scenarios realized by the corresponding steps are the same, but are not limited to the content disclosed in Embodiment One. It should be noted that the modules as part of the system can be executed in a computer system such as a group of computer executable instructions.

[0083] Embodiment Three

[0084] Embodiment Three of the present application provides a glare-free high beam LED gray scale adjustment system based on the glare-free high beam LED gray scale adjustment method of Embodiment One, which comprises a control unit, a linear matrix chip and an LED light source. The control unit is in communication connection with the linear matrix chip, and the linear matrix chip is in electrical connection with the LED light source.

[0085] In this embodiment, the MCU chip is used as the control unit, which mainly functions as the operation control unit in the whole system, executes the glare-free high beam LED gray scale adjustment method of Embodiment One, performs operation according to various sensor signals, and outputs specific light-up signals required for glare prevention to the linear matrix chip.

[0086] The power supply chip is used as the power supply unit of the whole system to supply power to the linear matrix chip and the MCU. The LED is used as the execution unit of the whole system and constitutes the execution unit of the glare prevention function together with the linear matrix chip. Each LED has a corresponding number, and the linear matrix chip turns on and off the LED with the corresponding number according to the light-up signal issued by the MCU, so as to realize gray scale adjustment within the light emitting angle corresponding to the numbered LED.

[0087] Embodiment Four

[0088] Embodiment Four of the present application provides an electronic device comprising a memory and a processor, and computer instructions stored in the memory and running on the processor. When the computer instructions are executed by the processor, the steps of the glare-free high beam LED gray scale adjustment method are completed.

[0089] Embodiment Five

[0090] Embodiment Five of the present application provides a computer readable storage medium for storing computer instructions, which, when executed by a processor, complete the steps of the glare-free high beam LED gray scale adjustment method.

[0091] The present application is described in reference to the flowchart and / or block diagrams of the methods, apparatus (systems) and computer program products according to embodiments of the present application. It will be understood that each block of the flowchart and / or block diagrams, and combinations of blocks in the flowchart and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart and / or block diagram block or blocks. Figure 1 one or more flowcharts and / or blocks Figure 1 means for functionally implementing the

[0092] These computer program instructions can also be stored in a computer- readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the Figure 1 one or more flowcharts and / or blocks Figure 1 means for functionally implementing the

[0093] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the Figure 1 one or more flowcharts and / or blocks Figure 1 means for functionally implementing the

[0094] The above description of the various embodiments has been presented for the purpose of illustration and description. It is not intended to be exhaustive or to limit the application to the precise form disclosed. Many modifications and variations are possible in light of the above teaching. It is intended that the scope of the application be limited not with this detailed description, but rather by the claims appended hereto.

[0095] The above description is only preferred embodiments of the present application, and is not intended to limit the present application. The present application can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, and improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the present application.

Claims

1. A method for adjusting the intensity of a high beam LED glare, characterized in that, The method comprises the following steps: acquiring coordinate information of a target object in front of the vehicle, and processing the coordinate information of the target object in front of the vehicle through tangent operation to obtain a lighting signal; configuring a PWM value output by a corresponding channel of a matrix lighting chip according to the lighting signal to realize stepless control of the matrix lighting chip; wherein, in the process of stepless control of the matrix lighting chip, the ambient light intensity is acquired, and the ambient light intensity is taken as a target value to calibrate the precision of stepless dimming through a CCP protocol; the processing of the coordinate information of the target object in front of the vehicle through tangent operation specifically comprises: determining a lateral distance from the camera to the target vehicle through tangent calculation; and acquiring a lateral distance and a longitudinal distance from the vehicle lamp to the target vehicle according to the distance between the vehicle lamp and the camera and the lateral distance from the camera to the target vehicle; the calibration of the precision of stepless dimming with the ambient light intensity as the target value through the CCP protocol specifically comprises: processing the PWM value output by the corresponding channel of the matrix lighting chip through a calibration tool to obtain an LED gray scale adjustment effect, and updating the PWM value output by the corresponding channel of the matrix lighting chip in real time according to the LED gray scale adjustment effect.

2. The method of claim 1, wherein the dimming of the high beam is performed by adjusting a gray scale of the LED. Before acquiring the image information of the target object in front of the vehicle, the method further comprises the following steps: ​ acquiring vehicle speed information, ambient light intensity information and light control gear information, comparing the vehicle speed information, the ambient light intensity information and the light control gear information with preset threshold values, and determining whether the conditions for stepless dimming are met.

3. The method of claim 1, wherein the method is performed by a processor of a vehicle. The coordinate information of the target object in front of the vehicle comprises a target object category, a longitudinal distance and a left boundary angle relative to a coordinate center of a front-view camera or a right boundary angle relative to the coordinate center of the front-view camera.

4. The method of claim 1, wherein the method is performed by a processor of a vehicle. The coordinate information of the target object in front of the vehicle is acquired by capturing image information of the target object in front of the vehicle through a front-view camera of the vehicle and processing the image information.

5. A LED dimming device for anti-dazzle high beam, characterized in that, The method further comprises: a lighting signal acquisition module configured to acquire coordinate information of a target object in front of the vehicle, and process the coordinate information of the target object in front of the vehicle through tangent operation to obtain a lighting signal; a stepless control module configured to configure a PWM value output by a corresponding channel of a matrix lighting chip according to the lighting signal to realize stepless control of the matrix lighting chip; wherein, in the process of stepless control of the matrix lighting chip, the ambient light intensity is acquired, and the ambient light intensity is taken as a target value to calibrate the precision of stepless dimming through a CCP protocol; the processing of the coordinate information of the target object in front of the vehicle through tangent operation specifically comprises: determining a lateral distance from the camera to the target vehicle through tangent calculation; and acquiring a lateral distance and a longitudinal distance from the vehicle lamp to the target vehicle according to the distance between the vehicle lamp and the camera and the lateral distance from the camera to the target vehicle; the calibration of the precision of stepless dimming with the ambient light intensity as the target value through the CCP protocol specifically comprises: processing the PWM value output by the corresponding channel of the matrix lighting chip through a calibration tool to obtain an LED gray scale adjustment effect, and updating the PWM value output by the corresponding channel of the matrix lighting chip in real time according to the LED gray scale adjustment effect.

6. A LED dimming system for anti-dazzle high beam, characterized in that, The LED gray scale adjustment method for anti-dazzle high beam based on any one of claims 1-4 comprises a control unit, a linear matrix chip and an LED light source; The control unit is in communication connection with the linear matrix chip, and the linear matrix chip is in electrical connection with the LED light source.

7. An electronic device, comprising: The computer program product comprises a memory and a processor, and computer instructions stored in the memory and run on the processor, and when the computer instructions are run by the processor, the steps of the LED dimming method for the anti-dazzling high beam according to any one of claims 1-4 are completed.

8. A computer-readable storage medium, characterized in that, The computer program product is used for storing computer instructions, and when the computer instructions are executed by the processor, the steps of the LED dimming method for the anti-dazzling high beam according to any one of claims 1-4 are completed.

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