Vehicle lamp control system, control method and vehicle

Abstract

The invention discloses a vehicle lamp control system and method and a vehicle, and relates to the field of vehicles, and the vehicle lamp control system comprises a detection module which is used for detecting front axle height information and rear axle height information of the vehicle; the calculation module is used for calculating the deviation angle of the light beam transmission direction of a low-beam illumination module of the vehicle relative to the light beam transmission direction of the low-beam illumination module in a preset state based on the front axle height information and the rear axle height information of the vehicle, and determining a control strategy of the low-beam illumination module; the control module is used for controlling the lighting state of the low-beam lighting module based on a control strategy; wherein the step of determining the control strategy of the low-beam illumination module comprises the step of determining the working state of each light-emitting unit in the second low-beam illumination module, so that when the posture of the vehicle body changes and the irradiation area of the light beam emitted by the low-beam illumination module can change, adjustment of the irradiation area of the low-beam illumination module is achieved; the influence of vehicle body posture change on the visual field range of a driver is reduced, and the driving safety coefficient is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a vehicle light control system, a control method, and a vehicle including the vehicle light control system. Background Art

[0002] With the development of science and technology, vehicles have become an indispensable means of transportation for people's daily work and life. Specifically, during the driving process, the vehicle's body posture will change due to the bumps caused by the flatness of the road surface, or the changes in the front and rear loads of the vehicle, or the acceleration and deceleration of the vehicle. When the vehicle's body posture changes during driving at night, the illumination area of ​​the headlights on the body will also change, thereby affecting the driver's field of vision and creating safety hazards. Summary of the invention

[0003] In view of the above problems, the present application provides a headlight control system, a control method and a vehicle including the headlight control system, so as to reduce the impact of changes in vehicle body posture on the driver's field of vision and improve driving safety. The specific scheme is as follows:

[0004] A vehicle light control system, comprising:

[0005] A detection module, used for detecting the front axle height information and the rear axle height information of the vehicle;

[0006] a calculation module, configured to calculate, based on the front axle height information and the rear axle height information of the vehicle, an offset angle of a light beam transmission direction of a low-beam lighting module of the vehicle compared to the light beam transmission direction of the low-beam lighting module in a preset state, and determine a control strategy of the low-beam lighting module, wherein the low-beam lighting module comprises a first low-beam lighting module and a second low-beam lighting module, the first low-beam lighting module comprises at least one light-emitting unit, the second low-beam lighting module comprises a plurality of light-emitting units, the light-emitting units in the first low-beam lighting module are uniformly controlled, and the light-emitting units in the second low-beam lighting module are independently controlled;

[0007] A control module, which controls the lighting state of the low-beam lighting module based on the control strategy;

[0008] Wherein, determining the control strategy of the low-beam lighting module includes determining the working state of each light-emitting unit in the second low-beam lighting module.

[0009] Optionally, the determining the control strategy of the low beam lighting module further includes: determining the light brightness of the light-emitting unit in the second lighting module that is in a light-emitting state.

[0010] Optionally, the calculation module includes:

[0011] A first calculation module, configured to calculate, based on the front axle height information and the rear axle height information of the vehicle, an offset angle of a light beam transmission direction of a low-beam lighting module of the vehicle compared to the light beam transmission direction of the low-beam lighting module in a preset state;

[0012] The second calculation module is used to determine the control strategy of the low beam lighting module based on the offset angle of the light beam transmission direction of the low beam lighting module of the vehicle compared to the light beam transmission direction of the low beam lighting module in a preset state.

[0013] Optionally, the second calculation module is used to determine the control strategy of the low beam lighting module based on the offset angle of the beam transmission direction of the low beam lighting module of the vehicle compared to the beam transmission direction of the low beam lighting module in a preset state, and specifically to execute:

[0014] Based on the offset angle of the beam transmission direction of the low beam lighting module of the vehicle compared to the beam transmission direction of the low beam lighting module in a preset state and the configuration information of the light-emitting units in the second low beam lighting module, the light-emitting units that need to be lit and the light-emitting units that need to be extinguished in the second low beam lighting module are determined.

[0015] Optionally, the second computing module is further configured to execute:

[0016] After determining the light-emitting units that need to be turned on and the light-emitting units that need to be turned off in the second low-beam lighting module, the lighting brightness of the overlapping area of ​​the beam range of the first low-beam lighting module and the beam range of the second low-beam lighting module is adjusted.

[0017] A vehicle comprising:

[0018] A low-beam lighting module, the low-beam lighting module comprising a first low-beam lighting module and a second low-beam lighting module, the first low-beam lighting module comprising at least one light-emitting unit, the second low-beam lighting module comprising a plurality of light-emitting units, the light-emitting units in the first low-beam lighting module being controlled uniformly, and the light-emitting units in the second low-beam lighting module being controlled independently;

[0019] A vehicle light control system, wherein the vehicle light control system is any of the vehicle light control systems described above.

[0020] Optionally, the relative positions of the first low-beam lighting module and the second low-beam lighting module are fixed.

[0021] Optionally, it also includes: a high beam lighting module, and the relative positions of the high beam lighting module and the low beam lighting module are fixed.

[0022] A vehicle light control method, comprising:

[0023] Obtaining the front axle height information and rear axle height information of the vehicle;

[0024] Based on the front axle height information and the rear axle height information of the vehicle, calculating the offset angle of the light beam transmission direction of the low beam lighting module of the vehicle compared to the light beam transmission direction of the low beam lighting module in a preset state, and determining the control strategy of the low beam lighting module, so that the control module of the vehicle controls the lighting state of the low beam lighting module based on the control strategy;

[0025] Among them, the low beam lighting module includes a first low beam lighting module and a second low beam lighting module, the first low beam lighting module includes at least one light-emitting unit, the second low beam lighting module includes multiple light-emitting units, the light-emitting units in the first low beam lighting module are uniformly controlled, and the light-emitting units in the second low beam lighting module are independently controlled; determining the control strategy of the low beam lighting module includes determining the working state of each light-emitting unit in the second low beam lighting module.

[0026] Optionally, the determining the control strategy of the low beam lighting module further includes: determining the light brightness of the light-emitting unit in the second lighting module that is in a light-emitting state.

[0027] The vehicle light control system provided in the embodiment of the present application adjusts the illumination area of ​​the low beam lighting module by controlling the working state of each light-emitting unit in the second low beam lighting module when the posture of the vehicle body changes so that the illumination area of ​​the light beam emitted by the low beam lighting module changes, thereby reducing the influence of the change of the vehicle body posture on the driver's field of vision and improving the driving safety factor. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the accompanying drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and the originals and elements are not necessarily drawn to scale.

[0029] Figure 1 It is a schematic diagram of the light beam irradiation area of ​​the low beam module when the vehicle body is in a neutral state;

[0030] Figure 2 It is a schematic diagram of the light beam irradiation area when the light of the low beam module is tilted upward;

[0031] Figure 3 It is a schematic diagram of the light beam irradiation area when the light of the low beam module is tilted downward;

[0032] Figure 4 A schematic diagram of the structure of a vehicle light control system provided by an embodiment of the present application;

[0033] Figure 5 A schematic diagram of light pattern distribution of a first lighting module in a vehicle light control system provided by an embodiment of the present application when the vehicle body is in a neutral state;

[0034] Figure 6 A schematic diagram of the light pattern distribution of the second lighting module in a vehicle light control system provided in one embodiment of the present application when the vehicle body is in a neutral state;

[0035] Figure 7 A schematic diagram of a light pattern distribution of a first lighting module and a light pattern distribution of a second lighting module combined when the vehicle body is in a neutral state in a vehicle light control system provided by an embodiment of the present application;

[0036] Figure 8 A schematic diagram of the light pattern distribution of the second low-beam lighting module after the light pattern distribution is adjusted downward by 2° and combined with the light pattern distribution of the first low-beam lighting module in a vehicle light control system provided by one embodiment of the present application;

[0037] Fig. 9 A schematic diagram of the structure of a vehicle light control system provided by another embodiment of the present application;

[0038] Fig.10 A flow chart of a control method provided by one embodiment of the present application. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the embodiments in the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0040] It is obvious to those skilled in the art that various modifications and changes can be made in this application without departing from the spirit or scope of this application. Therefore, this application is intended to cover modifications and changes of this application that fall within the scope of the corresponding claims (technical solutions claimed for protection) and their equivalents. It should be noted that the implementation methods provided in the embodiments of this application can be combined with each other without contradiction.

[0041] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0042] As described in the background technology section, when the vehicle's body posture changes during nighttime driving, the illumination area of ​​the headlights on the vehicle body will also change, thereby affecting the driver's field of vision and creating a safety hazard.

[0043] During nighttime driving, when the posture of the vehicle body changes, the height of the headlight on the vehicle body relative to the ground will also change, causing the light axis or irradiation direction of the headlight to change, causing the transmission direction of the light beam emitted by the headlight to tilt upward or downward. Specifically, when the transmission direction of the headlight beam tilts upward, the driver will not be able to see the road conditions nearby, and when the transmission direction of the headlight beam tilts downward, the driver will not be able to see the road conditions far away. Therefore, when the posture of the vehicle body changes, the irradiation area of ​​the light beam emitted by the headlight on the vehicle body will change, affecting the driver's field of vision and causing safety hazards.

[0044] When the vehicle leaves the factory, the initial low beam axis of the headlight is irradiated in a direction of approximately 0.57° downward from the horizontal plane. Figure 1 As shown, it can be simply understood as being parallel to the horizontal road, which is the default neutral state. When the vehicle is heavily loaded (the back seat is fully loaded or there is a heavy object in the trunk), the light axis of the front light will be lifted upwards, that is, the light will be tilted upwards, such as Figure 2 As shown, on the contrary, the light axis will be downward, such as Figure 3 shown.

[0045] The inventor has discovered that an automatic headlight leveling function can be introduced on a vehicle. When the posture of the vehicle body changes, causing the illumination area of ​​the light beam emitted by the headlight to change, thereby affecting the driver's field of vision, the light beam transmission direction of the headlight is adjusted to adjust the illumination area of ​​the headlight, thereby reducing the impact of the change in vehicle body posture on the driver's field of vision.

[0046] Specifically, a vehicle height sensor can be added to the vehicle body to detect the relative displacement of the vehicle body relative to the axle and the change in the suspension height by using the height sensor, so as to calculate the angle corresponding to the deviation height of the height difference between the front and rear axles of the vehicle at the current position compared to the height difference between the front and rear axles of the vehicle at the neutral state. It should be noted that the height difference between the front and rear axles of the vehicle at the neutral state is constant. When the height difference between the front and rear axles of the vehicle at the current position deviates from the height difference between the front and rear axles of the vehicle at the neutral state, the angle corresponding to the deviation height of the height difference between the front and rear axles of the vehicle at the current position compared to the height difference between the front and rear axles of the vehicle at the neutral state can be obtained in combination with the length of the front and rear axles. This angle value can be transmitted to the controller of the headlight through the vehicle body network such as LIN or CAN. The controller drives the stepper motor to rotate the dimming bracket of the headlight, so that the dimming bracket carries the headlight lighting module and pitches around the rotation axis of the center of mass plane of the headlight lighting module, thereby adjusting the optical axis of the light in the vertical direction, so that the low beam distribution of the headlight moves up and down in the vertical direction, and the light beam transmission direction of the headlight is adjusted, and then the irradiation area of ​​the headlight is adjusted.

[0047] However, a headlamp usually includes multiple lighting units. When a controller is used to drive a stepper motor to rotate a dimming bracket of the headlamp so that the dimming bracket carries the headlight lighting module and performs a pitch rotation around the rotation axis of the center of mass plane of the headlight lighting module, in addition to the stepper motor, sliding mechanical mechanism parts are also needed to realize the joint adjustment of multiple lighting modules. The life and response time of the mechanical mechanism parts are limited, and the cost is also relatively high.

[0048] In view of this, the embodiment of the present application provides a vehicle light control system, such as Figure 4 As shown, the vehicle light control system includes:

[0049] A detection module 10, used to detect the front axle height information and the rear axle height information of the vehicle;

[0050] A calculation module 20, for calculating, based on the front axle height information and the rear axle height information of the vehicle, an offset angle of the beam transmission direction of the low beam lighting module of the vehicle compared to the beam transmission direction of the low beam lighting module in a preset state, and determining a control strategy of the low beam lighting module, wherein the low beam lighting module includes a first low beam lighting module and a second low beam lighting module, the first low beam lighting module includes at least one light-emitting unit, the second low beam lighting module includes a plurality of light-emitting units, the light-emitting units in the first low beam lighting module are uniformly controlled, and the light-emitting units in the second low beam lighting module are independently controlled;

[0051] A control module 30, which controls the lighting state of the low beam lighting module based on the control strategy;

[0052] Wherein, determining the control strategy of the low-beam lighting module includes determining the working state of each light-emitting unit in the second low-beam lighting module.

[0053] Optionally, in one embodiment of the present application, the detection module includes a first detection module and a second detection module, wherein the first detection module is used to detect the height information of the front axle of the vehicle, and the second detection module is used to detect the height information of the rear axle of the vehicle. Specifically, the first detection module may be a height sensor, and the second detection module may also be a height sensor. The present application does not limit this, and it depends on the specific circumstances. It should be noted that the height information of the front axle of the vehicle may be the height difference between the front axle of the vehicle and the ground, and the height information of the rear axle of the vehicle may be the height difference between the rear axle of the vehicle and the ground.

[0054] Specifically, in one embodiment of the present application, the light-emitting unit is an LED, but the present application does not limit this and it depends on the specific circumstances.

[0055] In the headlight control system provided in the embodiment of the present application, a detection module is used to detect the front axle height information and the rear axle height information of the vehicle, and a calculation module is used to calculate the offset angle of the light beam transmission direction of the low beam lighting module of the vehicle compared to the light beam transmission direction of the low beam lighting module in a preset state based on the front axle height information and the rear axle height information of the vehicle, so as to determine the control strategy of the low beam lighting module, wherein the determination of the control strategy of the low beam lighting module includes determining the working state of each light-emitting unit in the second low beam lighting module, so that when the posture of the vehicle body changes, the illumination area of ​​the low beam lighting module is adjusted by controlling different light-emitting elements of the second low beam lighting module to be in a light-emitting state, thereby reducing the impact of the change in the vehicle body posture on the driver's field of vision and improving the driving safety factor.

[0056] On the basis of the above embodiments, in one embodiment of the present application, the calculation module includes:

[0057] A first calculation module, configured to calculate, based on the front axle height information and the rear axle height information of the vehicle, an offset angle of a light beam transmission direction of a low-beam lighting module of the vehicle compared to the light beam transmission direction of the low-beam lighting module in a preset state;

[0058] The second calculation module is used to determine the control strategy of the low beam lighting module based on the offset angle of the light beam transmission direction of the low beam lighting module of the vehicle compared to the light beam transmission direction of the low beam lighting module in a preset state.

[0059] Specifically, in one embodiment of the present application, the preset state is the factory setting state of the vehicle, that is, the vehicle is in a neutral state. At this time, the connecting line between the front axle and the rear axle of the vehicle is the first connecting line, and the projection of the first connecting line in the horizontal direction is the second connecting line, that is, the horizontal distance between the front axle and the rear axle of the vehicle is the length of the second connecting line, and the angle between the first connecting line and the second connecting line is In this embodiment, the first calculation module is used to calculate the offset angle of the light beam transmission direction of the low beam lighting module of the vehicle compared to the light beam transmission direction of the low beam lighting module in a preset state based on the front axle height information and the rear axle height information of the vehicle, and is specifically used to perform:

[0060] Based on the front axle height information and the rear axle height information of the vehicle, obtaining a height difference between the front axle and the rear axle of the vehicle as h;

[0061] Based on the height difference h between the front and rear axles of the vehicle and the horizontal distance l between the front and rear axles of the vehicle, calculate the inclination angle of the beam transmission direction of the vehicle's low beam lighting module , that is, at this time, the connecting line between the front axle and the rear axle of the vehicle is the first connecting line, the horizontal projection of the first connecting line is the second connecting line, and the angle between the first connecting line and the second connecting line is , which is also the pitch angle of the vehicle body;

[0062] The tilt angle of the beam transmission direction of the vehicle's low beam lighting module based on the current state , and the inclination angle of the light beam transmission direction of the low beam lighting module in the preset state , obtaining the offset angle of the beam transmission direction of the low beam lighting module of the vehicle compared to the beam transmission direction of the low beam lighting module in the preset state - .

[0063] On the basis of any of the above embodiments, in one embodiment of the present application, the second calculation module is used to determine the control strategy of the low beam lighting module based on the offset angle of the beam transmission direction of the low beam lighting module of the vehicle compared to the beam transmission direction of the low beam lighting module in a preset state, and is specifically used to execute:

[0064] Based on the offset angle of the beam transmission direction of the low beam lighting module of the vehicle compared to the beam transmission direction of the low beam lighting module in a preset state and the configuration information of the light-emitting units in the second low beam lighting module, the light-emitting units that need to be lit and the light-emitting units that need to be extinguished in the second low beam lighting module are determined.

[0065] Optionally, in one embodiment of the present application, the configuration information of the light-emitting units in the second low beam lighting module includes at least one of the arrangement information, angular resolution and other information of the light-emitting units in the second low beam lighting module, wherein the arrangement information of the light-emitting units in the second low beam lighting module includes the number of light-emitting units in a first direction and the number of light-emitting units in a second direction, wherein the first direction and the second direction are parallel to the light emitting surface of the second low beam lighting module, and the first direction and the second direction are different.

[0066] It should be noted that in the embodiment of the present application, the angular resolution is the angle of the beam angle corresponding to one light-emitting unit, and taking the first direction as the horizontal direction and the second direction as the vertical direction as an example, the determination method includes: based on the number of light-emitting units arranged along the second direction in the second low-beam lighting module and the beam angle range required to be covered by the low-beam lighting module in the second direction, the angular resolution is calculated, that is, the beam angle range required to be covered by the low-beam lighting module in the second direction / the number of light-emitting units arranged along the second direction in the second low-beam lighting module. Optionally, the angular resolution is not greater than 0.1°, but this application does not limit this, and it depends on the specific situation.

[0067] Specifically, in one embodiment of the present application, the second calculation module is used to determine the light-emitting units that need to be lit and the light-emitting units that need to be extinguished in the second low-beam lighting module based on the offset angle of the light beam transmission direction of the low-beam lighting module of the vehicle compared to the light beam transmission direction of the low-beam lighting module in a preset state and the configuration information of the light-emitting units in the second low-beam lighting module, and is specifically used to:

[0068] Based on the offset angle of the beam transmission direction of the low beam lighting module of the vehicle compared to the beam transmission direction of the low beam lighting module in the preset state and the angular resolution corresponding to the light-emitting units in the second low beam lighting module, the number of light-emitting units that need to be moved in the second direction under the current illumination state in the second low beam lighting module is determined. For example, the offset angle of the beam transmission direction of the low beam lighting module of the vehicle compared to the beam transmission direction of the low beam lighting module in the preset state is 1° upward, and the angular resolution is 0.2°. At this time, the position of the light-emitting unit that needs to be illuminated needs to be moved downward by 5 light-emitting units.

[0069] It should be noted that, in the factory setting of the vehicle, the illumination area of ​​the low beam illumination module is in a low beam light type distribution, that is, the illumination area of ​​the first low beam illumination module is in a first light type distribution, such as Figure 5 As shown, the illumination area of ​​the second low beam illumination module presents a second light pattern distribution, such as Figure 6 As shown, the illumination areas of the first low-beam lighting module and the second low-beam lighting module are generally distributed in a low-beam light pattern, such as Figure 7 As shown. Since the first low beam lighting module cannot adjust the low beam part light pattern it is responsible for, that is, the first light pattern distribution is fixed, therefore, in an optional embodiment of the present application, the second low beam lighting module is responsible for the low beam main regulation test area. Figure 8 As shown, it is a schematic diagram of the light pattern distribution after the light pattern distribution of the second low-beam lighting module is adjusted downward by 2° and combined with the light pattern distribution of the first low-beam lighting module.

[0070] It should also be noted that the second calculation module determines the number of light-emitting units that need to be moved in the second direction under the current illumination state in the second low-beam illumination module based on the offset angle of the light beam transmission direction of the low-beam illumination module of the vehicle compared to the light beam transmission direction of the low-beam illumination module in the preset state and the angular resolution corresponding to the light-emitting units in the second low-beam illumination module, so that after the control module controls the position of the light-emitting units that need to be illuminated in the second low-beam illumination module to move in the second direction, the light pattern combination of the first low-beam illumination module and the second low-beam illumination module may no longer meet the requirements of the low-beam light pattern distribution. Therefore, in this embodiment, the second calculation module also needs to determine the position of the light-emitting units that need to be in the light-emitting state in the first direction in the second low-beam illumination module based on the number of light-emitting units that need to be moved in the first direction under the current illumination state in the second low-beam illumination module and the low-beam light pattern distribution, so that the light pattern combination of the first low-beam illumination module and the second low-beam illumination module meets the requirements of the low-beam light pattern distribution.

[0071] It should be noted that, in this embodiment, after the second calculation module determines the position of the light-emitting unit that needs to be in the light-emitting state in the second low-beam lighting module, it generates a control instruction and sends it to the control module, so that the control module responds to the control instruction and controls the state of each light-emitting unit in the second low-beam lighting module.

[0072] It should be noted that after the control module controls the state of each light-emitting unit in the second low-beam lighting module based on the control instruction, the lighting area formed by the low-beam lighting module may have an area with uneven brightness changes, that is, after the lighting area of ​​the first low-beam lighting module and the lighting area of ​​the adjusted second low-beam lighting module are combined, there may be an area with uneven brightness changes in the overlapping area of ​​the lighting area of ​​the first low-beam lighting module and the lighting area of ​​the adjusted second low-beam lighting module, such as the appearance of bright areas or dark areas, which causes unclear vision or local overbrightness, affecting the normal judgment of the driver. Therefore, based on any of the above embodiments, in one embodiment of the present application, the control strategy for determining the low-beam lighting module also includes: determining the brightness of the light-emitting units in the second lighting module that are in a light-emitting state. In this embodiment, the second calculation module is also used to execute: after determining the light-emitting units that need to be turned on and the light-emitting units that need to be turned off in the second low-beam lighting module, adjust the lighting brightness of the overlapping area of ​​the beam range of the first low-beam lighting module and the beam range of the second low-beam lighting module, so that the brightness change of the overlapping area of ​​the lighting area of ​​the first low-beam lighting module and the adjusted lighting area of ​​the second low-beam lighting module achieves a smooth transition.

[0073] It should be noted that, since the low beam light pattern of the first low beam lighting module is fixed, its boundary angle and brightness are known, and the angle and brightness of the digital low beam light pattern distribution boundary formed after the position of the light-emitting unit that needs to be in the luminous state in the second low beam lighting module is translated are also known, that is, the boundary condition brightness and angle of the transition area between these two boundaries (the light pattern distribution boundary of the first low beam lighting module and the light pattern distribution boundary of the second low beam lighting module) are known. Therefore, in one embodiment of the present application, the second calculation module can adjust the lighting brightness of the overlapping area of ​​the beam range of the first low beam lighting module and the beam range of the second low beam lighting module through non-uniform rational B-splines (NURBS) or two-dimensional Gaussian functions, so that the brightness change of the overlapping area of ​​the lighting area of ​​the first low beam lighting module and the adjusted second low beam lighting module can achieve a smooth transition, but the present application is not limited to this, and it depends on the specific situation.

[0074] From the above, it can be seen that the vehicle light control system provided in the embodiment of the present application, when the posture of the vehicle body changes so that the illumination area of ​​the light beam emitted by the low beam lighting module changes, adjusts the illumination area of ​​the low beam lighting module by controlling the working state of each light-emitting unit in the second low beam lighting module, so as to reduce the impact of the change in vehicle body posture on the driver's field of vision. Not only does it not need to use a stepper motor, which can reduce costs and noise, but it also does not need other mechanical parts, thereby avoiding the problems of limited life and response time and high cost of the lighting module introduced due to the limited life and response time of mechanical parts and high cost.

[0075] Accordingly, an embodiment of the present application further provides a vehicle, including:

[0076] A low-beam lighting module, the low-beam lighting module comprising a first low-beam lighting module and a second low-beam lighting module, the first low-beam lighting module comprising at least one light-emitting unit, the second low-beam lighting module comprising a plurality of light-emitting units, the light-emitting units in the first low-beam lighting module being controlled uniformly, and the light-emitting units in the second low-beam lighting module being controlled independently;

[0077] A vehicle light control system, wherein the vehicle light control system is the vehicle light control system provided by any of the above embodiments. Since the relevant contents of the vehicle light control system have been described in the above embodiments, they will not be repeated here.

[0078] Optionally, in one embodiment of the present application, the second low-beam lighting module can be implemented based on a DMD digital micromirror or a Micro LED pixelated light source. The present application does not limit this, and it depends on the specific situation. It should be noted that the digital micromirror device (DMD) is a high-speed digital light reflection switch array based on micro-electromechanical system (MEMS) technology, which is used to achieve precise light control and projection display. Its working principle includes: DMD is composed of multiple small aluminum reflective mirrors, each micromirror represents a pixel, and the reflection direction of light is adjusted by controlling the deflection of these micromirrors to achieve image display; the Micro LED pixelation refers to a certain arrangement of multiple Micro LEDs in a high-density integrated manner, similar to the arrangement of pixels in a display panel.

[0079] On the basis of any of the above embodiments, in one embodiment of the present application, in order to prevent the first low-beam lighting module from being unable to perfectly match the light pattern of the second low-beam lighting module (high-definition headlight module) due to vibration or other reasons such as assembly, in an optional embodiment of the present application, the first low-beam lighting module and the second low-beam lighting module are structurally integrated into one module, so that the relative positions of the first low-beam lighting module and the second low-beam lighting module are fixed, so that the low-beam lighting module as a whole has a certain stability to environmental changes. However, the present application does not limit this, and it depends on the specific situation.

[0080] In actual applications, the vehicle has not only a low beam function but also a high beam function. To prevent the high beam center and the low beam from not matching when the high beam function of the vehicle is turned on after the low beam is automatically leveled (i.e., after the low beam type of the low beam lighting module is automatically adjusted), in one embodiment of the present application, the relative positions of the high beam lighting module and the low beam lighting module are fixed, such as the first low beam lighting module, the second low beam lighting module and the high beam lighting module are integrated together to form a three-in-one single high-definition high and low beam module, realizing functions such as adaptive low beam, adaptive high beam, ground-assisted driving projection, and dynamic welcome. However, the present application does not limit this, and it depends on the specific situation.

[0081] Optionally, in one embodiment of the present application, Fig. 9As shown, the control module can be integrated with the second low beam lighting module to form a digital headlight module. In this embodiment, the detection module 10 uses a front axle height sensor to detect the height of the front axle of the vehicle, and uses a rear axle height sensor to detect the height of the rear axle of the vehicle; the first calculation module 21 calculates the pitch angle of the vehicle body in the vertical direction, that is, the inclination angle of the light beam transmission direction of the low beam lighting module of the vehicle based on the height of the front axle of the vehicle and the height of the rear axle of the vehicle; the second calculation module 22 calculates the offset direction and the number of offset pixels of the current low beam light type and the low beam light type in the neutral state, regenerates the adjusted low beam light type, and calculates the brightness distribution of the transition area or overlapping area of ​​the light type boundary of the second lighting module and the light type of the first lighting module in the adjusted low beam light type; the digital headlight module 40 receives the adjusted low beam light type in real time and projects it out to achieve the adjustment of the lighting area of ​​the lighting module.

[0082] Specifically, in one embodiment of the present application, the digital car light module includes: a high-definition imaging projection lens with 3 to 5 glass or plastic lenses; a lens bracket for fixing the relative position between the lens and the LED light source board; an individually addressable and programmable light-emitting LED PCB light source board or a DMD / LCD / MEMS spatial light modulation device circuit board in conjunction with an LED lighting optical path; a heat dissipation structure of the LED PCB (including a fan); and a digital car light module drive controller. Optionally, each LED pixel on the LED light source board can be brightness-adjusted by an 8-bit or 10-bit PWM, thereby achieving different brightness light distributions on the LED light source surface, which are then projected out through the imaging lens, and the light distribution information on the LED light source surface is retained. However, the present application does not limit this, and it depends on the specific circumstances.

[0083] The headlight control system and vehicle provided in the embodiment of the present application, when the posture of the vehicle body changes so that the illumination area of ​​the light beam emitted by the low beam lighting module changes, the illumination area of ​​the low beam lighting module is adjusted by controlling the working state of each light-emitting unit in the second low beam lighting module to reduce the influence of the change of the vehicle body posture on the driver's field of vision, and have fast response speed, high reliability, long service life and low cost.

[0084] In addition, the present application also provides a control method, such as Fig.10 As shown, the control method includes:

[0085] S1: Obtaining the front axle height information and the rear axle height information of the vehicle;

[0086] S2: Based on the front axle height information and the rear axle height information of the vehicle, calculate the offset angle of the light beam transmission direction of the low beam lighting module of the vehicle compared to the light beam transmission direction of the low beam lighting module in a preset state, and determine the control strategy of the low beam lighting module, so that the control module of the vehicle controls the lighting state of the low beam lighting module based on the control strategy; wherein the low beam lighting module includes a first low beam lighting module and a second low beam lighting module, the first low beam lighting module includes at least one light-emitting unit, the second low beam lighting module includes a plurality of light-emitting units, the light-emitting units in the first low beam lighting module are uniformly controlled, and the light-emitting units in the second low beam lighting module are independently controlled; the determination of the control strategy of the low beam lighting module includes determining the working state of each light-emitting unit in the second low beam lighting module.

[0087] Optionally, in one embodiment of the present application, based on the front axle height information and the rear axle height information of the vehicle, calculating the offset angle of the beam transmission direction of the low beam lighting module of the vehicle compared to the beam transmission direction of the low beam lighting module in a preset state, and determining the control strategy of the low beam lighting module includes:

[0088] Based on the front axle height information and the rear axle height information of the vehicle, calculating an offset angle of a light beam transmission direction of a low-beam lighting module of the vehicle compared to the light beam transmission direction of the low-beam lighting module in a preset state;

[0089] A control strategy of the low beam lighting module is determined based on an offset angle of a light beam transmission direction of the low beam lighting module of the vehicle compared to the light beam transmission direction of the low beam lighting module in a preset state.

[0090] Specifically, in one embodiment of the present application, the preset state is the factory setting state of the vehicle, that is, the vehicle is in a neutral state. At this time, the connecting line between the front axle and the rear axle of the vehicle is the first connecting line, and the projection of the first connecting line in the horizontal direction is the second connecting line, that is, the horizontal distance between the front axle and the rear axle of the vehicle is the length of the second connecting line, and the angle between the first connecting line and the second connecting line is In this embodiment, the calculation of the offset angle of the beam transmission direction of the low beam lighting module of the vehicle compared to the beam transmission direction of the low beam lighting module in a preset state based on the front axle height information and the rear axle height information of the vehicle includes:

[0091] Based on the front axle height information and the rear axle height information of the vehicle, obtaining a height difference between the front axle and the rear axle of the vehicle as h;

[0092] Based on the height difference h between the front and rear axles of the vehicle and the horizontal distance l between the front and rear axles of the vehicle, calculate the inclination angle of the beam transmission direction of the vehicle's low beam lighting module , that is, at this time, the connecting line between the front axle and the rear axle of the vehicle is the first connecting line, the horizontal projection of the first connecting line is the second connecting line, and the angle between the first connecting line and the second connecting line is , which is also the pitch angle of the vehicle body;

[0093] The tilt angle of the beam transmission direction of the vehicle's low beam lighting module based on the current state , and the inclination angle of the light beam transmission direction of the low beam lighting module in the preset state , obtaining the offset angle of the beam transmission direction of the low beam lighting module of the vehicle compared to the beam transmission direction of the low beam lighting module in the preset state - .

[0094] On the basis of any of the above embodiments, in one embodiment of the present application, the control strategy of the low beam lighting module is determined based on the offset angle of the beam transmission direction of the low beam lighting module of the vehicle compared to the beam transmission direction of the low beam lighting module in a preset state, including:

[0095] Based on the offset angle of the beam transmission direction of the low beam lighting module of the vehicle compared to the beam transmission direction of the low beam lighting module in a preset state and the configuration information of the light-emitting units in the second low beam lighting module, the light-emitting units that need to be lit and the light-emitting units that need to be extinguished in the second low beam lighting module are determined.

[0096] Optionally, in one embodiment of the present application, the configuration information of the light-emitting units in the second low beam lighting module includes at least one of the arrangement information, angular resolution and other information of the light-emitting units in the second low beam lighting module, wherein the arrangement information of the light-emitting units in the second low beam lighting module includes the number of light-emitting units in a first direction and the number of light-emitting units in a second direction, wherein the first direction and the second direction are parallel to the light emitting surface of the second low beam lighting module, and the first direction and the second direction are different.

[0097] It should be noted that in the embodiment of the present application, the angular resolution is the angle of the beam angle corresponding to one light-emitting unit, and taking the first direction as the horizontal direction and the second direction as the vertical direction as an example, the determination method includes: based on the number of light-emitting units arranged along the second direction in the second low-beam lighting module and the beam angle range required to be covered by the low-beam lighting module in the second direction, the angular resolution is calculated, that is, the beam angle range required to be covered by the low-beam lighting module in the second direction / the number of light-emitting units arranged along the second direction in the second low-beam lighting module. Optionally, the angular resolution is not greater than 0.1°, but this application does not limit this, and it depends on the specific situation.

[0098] Specifically, in one embodiment of the present application, the determining the light-emitting units to be lit and the light-emitting units to be extinguished in the second low-beam lighting module based on the offset angle of the light beam transmission direction of the low-beam lighting module of the vehicle compared to the light beam transmission direction of the low-beam lighting module in a preset state and the configuration information of the light-emitting units in the second low-beam lighting module includes:

[0099] Based on the offset angle of the beam transmission direction of the low beam lighting module of the vehicle compared to the beam transmission direction of the low beam lighting module in the preset state and the angular resolution corresponding to the light-emitting units in the second low beam lighting module, the number of light-emitting units that need to be moved in the second direction under the current illumination state in the second low beam lighting module is determined. For example, the offset angle of the beam transmission direction of the low beam lighting module of the vehicle compared to the beam transmission direction of the low beam lighting module in the preset state is 1° upward, and the angular resolution is 0.2°. At this time, the position of the light-emitting unit that needs to be illuminated needs to be moved downward by 5 light-emitting units.

[0100] It should be noted that the control method determines the number of light-emitting units that need to be moved in the second direction under the current illumination state in the second low-beam illumination module based on the offset angle of the light beam transmission direction of the low-beam illumination module of the vehicle compared to the light beam transmission direction of the low-beam illumination module in the preset state and the angular resolution corresponding to the light-emitting units in the second low-beam illumination module, so that after the control module controls the position of the light-emitting units that need to be lit in the second low-beam illumination module to move in the second direction, the light pattern combination of the first low-beam illumination module and the second low-beam illumination module may no longer meet the requirements of the low-beam light pattern distribution. Therefore, in this embodiment, the control method also includes: based on the number of light-emitting units that need to be moved in the first direction under the current illumination state in the second low-beam illumination module and the low-beam light pattern distribution, determine the position of the light-emitting units that need to be in the light-emitting state in the first direction in the second low-beam illumination module, so that the light pattern combination of the first low-beam illumination module and the second low-beam illumination module meets the requirements of the low-beam light pattern distribution.

[0101] It should be noted that, after the control method controls the state of each light-emitting unit in the second low-beam lighting module, the illumination area formed by the low-beam lighting module may have an area with uneven brightness change, that is, after the illumination area of ​​the first low-beam lighting module and the illumination area of ​​the adjusted second low-beam lighting module are combined, there may be an area with uneven brightness change in the overlapping area of ​​the illumination area of ​​the first low-beam lighting module and the illumination area of ​​the adjusted second low-beam lighting module, such as a bright area or a dark area, which causes unclear vision or local overbrightness, affecting the normal judgment of the driver. Therefore, on the basis of any of the above embodiments, in an embodiment of the present application, the control strategy for determining the low-beam lighting module also includes: determining the brightness of the light-emitting units in the second lighting module that are in a light-emitting state. In this embodiment, the control method also includes: after determining the light-emitting units that need to be lit and the light-emitting units that need to be extinguished in the second low-beam lighting module, adjusting the illumination brightness of the overlapping area of ​​the beam range of the first low-beam lighting module and the beam range of the second low-beam lighting module, so that the brightness change of the overlapping area of ​​the illumination area of ​​the first low-beam lighting module and the illumination area of ​​the adjusted second low-beam lighting module achieves a smooth transition.

[0102] Since the low beam light pattern of the first low beam lighting module is fixed, its boundary angle and brightness are known, and the angle and brightness of the digital low beam light pattern distribution boundary formed after the position of the light-emitting unit that needs to be in the emitting state in the second low beam lighting module is translated are also known, that is, the boundary condition brightness and angle of the transition area between these two boundaries (the light pattern distribution boundary of the first low beam lighting module and the light pattern distribution boundary of the second low beam lighting module) are known. Therefore, in one embodiment of the present application, the control method can adjust the lighting brightness of the overlapping area of ​​the beam range of the first low beam lighting module and the beam range of the second low beam lighting module through non-uniform rational B-splines (NURBS) or two-dimensional Gaussian functions, so that the brightness change of the overlapping area of ​​the lighting area of ​​the first low beam lighting module and the adjusted lighting area of ​​the second low beam lighting module can achieve a smooth transition, but the present application is not limited to this, and it depends on the specific situation.

[0103] From the above, it can be seen that the control method provided in the embodiment of the present application can adjust the illumination area of ​​the low beam lighting module by controlling the working state of each light-emitting unit in the second low beam lighting module when the posture of the vehicle body changes so that the illumination area of ​​the light beam emitted by the low beam lighting module changes, so as to reduce the impact of the change of the vehicle body posture on the driver's field of vision, improve the driving safety factor, and have a fast response speed, high reliability and low cost.

[0104] In this specification, each embodiment is described in a progressive, parallel, or progressive and parallel manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0105] It should be noted that in the description of the present application, it should be understood that the description of the drawings and embodiments is illustrative rather than restrictive. The same reference numerals throughout the embodiments of the specification mark the same structure. In addition, for the purpose of understanding and ease of description, the drawings may exaggerate the thickness of some layers, films, panels, regions, etc. It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the term "includes", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that the article or equipment including a series of elements includes not only those elements, but also includes other elements that are not clearly listed, or also includes elements inherent to such articles or equipment. In the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the articles or equipment including the above elements.

[0106] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vehicle light control system, characterized in that: include: A detection module, used for detecting the front axle height information and the rear axle height information of the vehicle; a calculation module, configured to calculate, based on the front axle height information and the rear axle height information of the vehicle, an offset angle of a light beam transmission direction of a low-beam lighting module of the vehicle compared to the light beam transmission direction of the low-beam lighting module in a preset state, and determine a control strategy of the low-beam lighting module, wherein the low-beam lighting module comprises a first low-beam lighting module and a second low-beam lighting module, the first low-beam lighting module comprises at least one light-emitting unit, the second low-beam lighting module comprises a plurality of light-emitting units, the light-emitting units in the first low-beam lighting module are uniformly controlled, and the light-emitting units in the second low-beam lighting module are independently controlled; A control module, which controls the lighting state of the low-beam lighting module based on the control strategy; Wherein, determining the control strategy of the low-beam lighting module includes determining the working state of each light-emitting unit in the second low-beam lighting module.

2. The vehicle light control system according to claim 1, characterized in that: The determining of the control strategy of the low beam lighting module further includes: determining the light emitting brightness of the light emitting unit in the second lighting module that is in a light emitting state.

3. The vehicle light control system according to claim 1, characterized in that: The calculation module comprises: A first calculation module, configured to calculate, based on the front axle height information and the rear axle height information of the vehicle, an offset angle of a light beam transmission direction of a low-beam lighting module of the vehicle compared to the light beam transmission direction of the low-beam lighting module in a preset state; The second calculation module is used to determine the control strategy of the low beam lighting module based on the offset angle of the light beam transmission direction of the low beam lighting module of the vehicle compared to the light beam transmission direction of the low beam lighting module in a preset state.

4. The vehicle light control system according to claim 3, characterized in that: The second calculation module is used to determine the control strategy of the low beam lighting module based on the offset angle of the beam transmission direction of the low beam lighting module of the vehicle compared to the beam transmission direction of the low beam lighting module in a preset state, and is specifically used to execute: Based on the offset angle of the beam transmission direction of the low beam lighting module of the vehicle compared to the beam transmission direction of the low beam lighting module in a preset state and the configuration information of the light-emitting units in the second low beam lighting module, the light-emitting units that need to be lit and the light-emitting units that need to be extinguished in the second low beam lighting module are determined.

5. The vehicle light control system according to claim 4, characterized in that: The second computing module is further configured to execute: After determining the light-emitting units that need to be turned on and the light-emitting units that need to be turned off in the second low-beam lighting module, the lighting brightness of the overlapping area of ​​the beam range of the first low-beam lighting module and the beam range of the second low-beam lighting module is adjusted.

6. A vehicle, characterized in that: include: A low-beam lighting module, the low-beam lighting module comprising a first low-beam lighting module and a second low-beam lighting module, the first low-beam lighting module comprising at least one light-emitting unit, the second low-beam lighting module comprising a plurality of light-emitting units, the light-emitting units in the first low-beam lighting module being controlled uniformly, and the light-emitting units in the second low-beam lighting module being controlled independently; A vehicle light control system, wherein the vehicle light control system is the vehicle light control system according to any one of claims 1 to 5.

7. The vehicle according to claim 6, characterized in that The relative positions of the first low-beam lighting module and the second low-beam lighting module are fixed.

8. The vehicle according to claim 6, characterized in that Also includes: A high beam lighting module, wherein the relative positions of the high beam lighting module and the low beam lighting module are fixed.

9. A vehicle light control method, characterized in that: include: Obtaining the front axle height information and rear axle height information of the vehicle; Based on the front axle height information and the rear axle height information of the vehicle, calculating the offset angle of the light beam transmission direction of the low beam lighting module of the vehicle compared to the light beam transmission direction of the low beam lighting module in a preset state, and determining the control strategy of the low beam lighting module, so that the control module of the vehicle controls the lighting state of the low beam lighting module based on the control strategy; Among them, the low beam lighting module includes a first low beam lighting module and a second low beam lighting module, the first low beam lighting module includes at least one light-emitting unit, the second low beam lighting module includes multiple light-emitting units, the light-emitting units in the first low beam lighting module are uniformly controlled, and the light-emitting units in the second low beam lighting module are independently controlled; determining the control strategy of the low beam lighting module includes determining the working state of each light-emitting unit in the second low beam lighting module.

10. The vehicle light control method according to claim 9, characterized in that: The determining of the control strategy of the low beam lighting module further includes: determining the light emitting brightness of the light emitting unit in the second lighting module that is in a light emitting state.

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