Self-adaptive light control method for vehicle headlamp

Abstract

The invention provides a self-adaptive light control method for a vehicle headlamp. A first high beam light source module, a low beam light source module and a second high beam light source module are sequentially arranged at the front end of a vehicle body side by side. The first high beam light source module and the second high beam light source module jointly form continuous high beam light spots. A high beam light spot is divided into a plurality of high beam illumination intervals, and each high beam illumination interval can independently control illumination or turn-off. The first high beam light source module, the low beam light source module and the second high beam light source module are controlled to project right ahead; the front vehicle in the opposite direction enters a plurality of high-beam illumination intervals, the relative position of the front vehicle and the parking space is measured in real time, the high-beam illumination interval where the front vehicle is located is judged according to the relative position, and illumination of the high-beam illumination interval is controlled to be turned off; and controlling the other high beam illumination intervals and the low beam lamp module to keep illumination. According to the method, the illumination range of the vehicle headlamp can be intelligently adjusted in real time, potential safety hazards caused by irradiation of the high beam to the vehicle are avoided, and the safety performance is improved.

Description

Technical Field

[0001] This invention relates to the field of automotive lighting technology, and more specifically, to an adaptive light control method for automotive headlights. Background Technology

[0002] With the rapid development of the automotive lighting industry and the increasing complexity of nighttime driving scenarios, the performance requirements for headlights, as an important component of the active safety system for motorcycles / electric bicycles, are constantly being raised.

[0003] Most existing motorcycle / electric bicycle headlights only meet basic road lighting needs, using a fixed high / low beam switching mode. This traditional control method has significant limitations: the system cannot sense the position of oncoming vehicles in real time. When two vehicles are traveling towards each other, if the driver does not manually switch to high beams in time, the intense beam will directly illuminate the oncoming driver, causing severe glare. This glare can temporarily blind the oncoming driver, making it impossible for them to accurately judge road conditions ahead, which can easily lead to serious traffic accidents and seriously threaten nighttime driving safety.

[0004] Therefore, developing a method that can intelligently adjust the headlights in real time to address the safety hazards caused by high beams illuminating oncoming vehicles has become an urgent task to improve the active safety performance of motorcycles / electric bicycles and meet the market's demand for intelligent technology. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings and deficiencies of the prior art and provide an adaptive light control method for vehicle headlights. This adaptive light control method can intelligently adjust the illumination range of vehicle headlights in real time, which can not only solve the safety hazards caused by high beams illuminating oncoming vehicles, thereby improving safety performance, but also simplify the control method and reduce costs, making it suitable for use and promotion in the automotive lighting industry.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: an adaptive light control method for vehicle headlights, characterized in that: a high beam light source module one, a low beam light module, and a high beam light source module two are arranged side by side at the front end of the vehicle body; the high beam light source module one and the high beam light source module two together form a continuous high beam light spot; the high beam light spot is divided into several high beam illumination zones, and each high beam illumination zone can be independently controlled to illuminate or be turned off;

[0007] The adaptive headlight control method is as follows: control the high beam light source module 1, low beam light module and high beam light source module 2 to project in the forward direction; when a vehicle in the opposite direction enters several high beam lighting zones, measure the relative position of the vehicle in front and the parking space in real time, determine the high beam lighting zone in which the vehicle in front is located based on the relative position, and control the lighting of the high beam lighting zone to be turned off; at the same time, control the remaining high beam lighting zones and low beam light modules to keep the lights on, so as to realize the adaptive headlight control.

[0008] In the above solution, this invention can measure the relative position of the vehicle ahead and the parking space in real time. By individually controlling the high beam illumination zone of the vehicle ahead to turn off, while controlling the remaining high beam illumination zones and low beam modules to maintain illumination, it achieves real-time intelligent adjustment of the headlight illumination range. This effectively solves the safety hazard caused by the vehicle's high beam illumination to vehicles ahead, thereby improving safety performance. It also ensures the brightness and illumination range of the vehicle's low beam and high beam illumination. While ensuring a sufficiently large high beam illumination range while the vehicle is in motion, it further enhances the safety of the vehicle when driving on multi-vehicle roads. In addition, this control method is simple, low-cost, and cost-effective, making it suitable for use and promotion in the automotive lighting industry.

[0009] Specifically, when a vehicle in the opposite direction enters several high-beam illumination zones, the relative position of the vehicle in front and the parking space is measured in real time. Based on the relative position, the high-beam illumination zone in which the vehicle in front is located is determined, and the illumination in that high-beam illumination zone is turned off. At the same time, the remaining high-beam illumination zones and low-beam modules are kept illuminated. This adaptive headlight control means:

[0010] When a vehicle in the opposite direction enters several high beam illumination zones, the angle between the position of the vehicle in front and the position of the vehicle body is measured in real time. The high beam illumination zone at the boundary of the high beam illumination zone covered by the angle is identified as the high beam illumination zone where the vehicle in front is located, and the illumination of the high beam illumination zone at the boundary is turned off. At the same time, the remaining high beam illumination zones and low beam modules are kept illuminated to achieve adaptive light control of the headlights. Here, with the longitudinal plane of the vehicle body as the plane of symmetry, the angle between the position of the vehicle in front and the position of the vehicle body refers to the angle between the line connecting the positions of the vehicle in front and the vehicle body and the vertical plane of symmetry.

[0011] The high beam light source module one and the high beam light source module two respectively include a substrate, a high beam lens and several identical lamp bead assemblies; the high beam lens covers the substrate, and the several lamp bead assemblies are evenly arranged on the substrate in sequence, and the light emitted by the several lamp bead assemblies is directed toward the high beam lens and forms a light-emitting area; the focal point of the high beam lens is set at the center of the light-emitting area.

[0012] The high beam light source module one and the high beam light source module two have the same lamp bead assembly structure, both including a lamp bead light-emitting surface and a lamp bead substrate; the lamp bead light-emitting surface is mounted on the lamp bead substrate and disposed on the substrate through the lamp bead substrate.

[0013] In a row of closely arranged LED light-emitting surfaces, LED light-emitting surfaces are extracted at intervals. The extracted LED light-emitting surfaces are installed on the LED substrate as LED components of the high beam light source module one; the remaining LED light-emitting surfaces are installed on the LED substrate as LED components of the high beam light source module two.

[0014] In the LED chip assemblies of high beam light source module one and high beam light source module two, the distance between the light-emitting surfaces of two adjacent LED chips is equal to the width of the light-emitting surface of one LED chip.

[0015] The light-emitting surfaces of the LED beads in the high beam light source module one and the light-emitting surfaces of the LED beads in the low beam light source module two together form a continuous high beam light spot.

[0016] The shape of the light-emitting surface of the lamp bead is rectangular; the width 'a' of the light-emitting surface of the lamp bead satisfies the following condition: 2a≥b+d; where b is the width of the lamp bead substrate, and d is the minimum gap that can be achieved between adjacent lamp bead substrates under actual production conditions.

[0017] The division of the high beam spot into several high beam illumination zones means that the high beam spot is divided into several high beam illumination zones according to the illumination range from the horizontal beam angle -ω of one edge to the horizontal beam angle ω of the other edge; wherein, the longitudinal plane opposite the vehicle body is the plane of symmetry, negative values ​​indicate the left side of the vertical plane of symmetry of the vehicle body, and positive values ​​indicate the right side of the vertical plane of symmetry of the vehicle body.

[0018] Specifically, the range from -ω to ω is divided into 2n+1 high beam illumination intervals, with the angles of each high beam illumination interval being respectively... Then there is 2ω is the illumination range angle of the high beam spot; where ω>0, n≥4.

[0019] Based on the focal length f of the high beam lens and the width a of the LED's emitting surface, the angle of each high beam illumination zone is calculated as follows: , , , ..., Since all the LED components are exactly the same, there are .

[0020] The adaptive beam control method involves controlling the high beam light source module 1, the low beam light module, and the high beam light source module 2 to project light in a forward direction; and measuring in real time the angle between the position of the vehicle in front and the position of the vehicle body. :

[0021] when At that time, the included angle The right-side high beam illumination zone c, which is located at the boundary of the covered right-side high beam illumination zone 0 to c, is determined to be the high beam illumination zone where the vehicle in front is located. The illumination of the right-side high beam illumination zone c is turned off, while the illumination of the other high beam illumination zones and low beam modules is kept on. Wherein, n≥c≥2.

[0022] when At that time, the included angle The left high beam illumination zone b, which is located at the boundary of the covered left high beam illumination zone 0 to b, is determined to be the high beam illumination zone of the vehicle in front. The illumination of the left high beam illumination zone b is turned off, while the illumination of the other high beam illumination zones and low beam modules is kept on. Wherein, n≥b≥2.

[0023] The relative position angle between the vehicle in front and the parking space is measured using LiDAR or millimeter-wave radar.

[0024] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0025] 1. The adaptive light control method for vehicle headlights of the present invention can intelligently adjust the illumination range of vehicle headlights in real time, which can not only solve the safety hazards caused by high beams illuminating oncoming vehicles, thereby improving safety performance; but also has a simple control method and low cost, making it suitable for use and promotion in the automotive lighting industry.

[0026] 2. The adaptive light control method for vehicle headlights of this invention can effectively solve the safety hazards caused by the high beams of the vehicle to vehicles ahead, while also ensuring the brightness and range of both the low beam and high beam lighting of the vehicle. While ensuring a sufficiently large high beam illumination range while the vehicle is in motion, it further improves the safety of the vehicle when driving on multi-vehicle roads.

[0027] 3. Compared with commercially available headlight products, the adaptive light control method of the headlight of this invention achieves the ADB function of the high beam module with only two high beam light source modules, which greatly reduces the number of optical components, simplifies the structure and control system, and has a cost-effectiveness far superior to the technical solutions that use array light sources with dozens of LEDs or applicable Micro-LED array light sources. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the high beam illumination range of the vehicle body in the adaptive light control method of the vehicle headlights of the present invention;

[0029] Figure 2 This is a schematic diagram showing the positions of the high beam light source module one, the low beam light module, and the high beam light source module two in the adaptive light control method of the present invention;

[0030] Figure 3This is an internal schematic diagram of the high beam light source module one and the high beam light source module two in the adaptive light control method of the present invention;

[0031] Figure 4 This is a schematic diagram of how the lamp bead assemblies of the present invention are allocated in a row of closely arranged lamp bead light-emitting surfaces as high beam light source module one and high beam light source module two;

[0032] Figure 5 This is a schematic diagram of the LED bead assembly of the present invention;

[0033] Figure 6 This is a top-view rendering of the high beam light spot of the present invention;

[0034] Figure 7 This is a rendering showing the effect of the high beam illumination zone being fully illuminated in the high beam light spot of this invention;

[0035] Figure 8 This is a diagram illustrating the lighting effect of controlling and turning off the right-side high beam lighting zone 3 according to the present invention;

[0036] Figure 9 This is a diagram illustrating the lighting effect of controlling and turning off the right-side high beam lighting zone 2 according to the present invention;

[0037] Among them, 1 is the high beam light source module one, 2 is the low beam light module, 3 is the high beam light source module two, 4 is the substrate, 5 is the high beam lens, 6 is the light-emitting surface of the lamp bead, and 7 is the lamp bead substrate. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0039] Example

[0040] like Figures 1 to 9 As shown, the adaptive light control method for the headlights of this invention is as follows: a high beam light source module 1, a low beam light module 2, and a high beam light source module 3 are arranged side by side at the front end of the vehicle body. The high beam light source module 1 and the high beam light source module 3 together form a continuous high beam light spot. The high beam light spot is divided into several high beam illumination zones, and each high beam illumination zone can be independently controlled to be illuminated or turned off.

[0041] The adaptive headlight control method is as follows: The high beam light source module 1, low beam light module 2, and high beam light source module 3 are controlled to project light in the forward direction. When a vehicle in the opposite direction enters several high beam illumination zones, the angle between the position of the vehicle in front and the position of the vehicle body is measured in real time. The high beam illumination zone at the boundary of the high beam illumination zone covered by the angle is identified as the high beam illumination zone where the vehicle in front is located, and the illumination of the high beam illumination zone at the boundary is turned off. Simultaneously, the remaining high beam illumination zones and low beam light module 2 are kept illuminated, achieving adaptive headlight control. Here, with the longitudinal plane of the vehicle body as the plane of symmetry, the angle between the position of the vehicle in front and the position of the vehicle body refers to the angle between the line connecting the positions of the vehicle in front and the vehicle body and the vertical plane of symmetry. The relative position angle between the vehicle in front and the parking space is measured using LiDAR or millimeter-wave radar.

[0042] Specifically, the high beam light source module 1 and the high beam light source module 3 of the present invention respectively include a substrate 4, a high beam lens 5 and a plurality of identical lamp bead assemblies, wherein the high beam lens 5 covers the substrate 4, the plurality of lamp bead assemblies are evenly arranged on the substrate 4, and the light emitted by the plurality of lamp bead assemblies is directed toward the high beam lens 5 and forms a light-emitting area; the focal point of the high beam lens 5 is set at the center of the light-emitting area.

[0043] The LED chip structures of both the high beam light source module 1 and the high beam light source module 3 are identical, both including an LED light-emitting surface 6 and an LED substrate 7. The LED light-emitting surface 6 is mounted on the LED substrate 7 and disposed on the substrate 4 through the LED substrate 7. In this invention, LED light-emitting surfaces 6 are extracted at intervals from a row of closely arranged LED light-emitting surfaces 6. The extracted LED light-emitting surfaces 6 are mounted on the LED substrate 7 as the LED chip assembly of the high beam light source module 1; the remaining LED light-emitting surfaces 6 are mounted on the LED substrate 7 as the LED chip assembly of the high beam light source module 3. Therefore, in the LED chip assemblies of the high beam light source module 1 and the high beam light source module 3, the distance between two adjacent LED light-emitting surfaces 6 is equal to the width 'a' of one LED light-emitting surface 6. Thus, the LED light-emitting surfaces 6 of the high beam light source module 1 and the LED light-emitting surfaces 6 of the high beam light source module 3 together form a continuous high beam light spot.

[0044] The shape of the light-emitting surface 6 of the lamp bead in this invention is rectangular, and the width a of the light-emitting surface 6 of the lamp bead satisfies the following condition: 2a≥b+d; where b is the width of the lamp bead substrate 7, and d is the minimum gap that can be achieved between adjacent lamp bead substrates 7 under actual production conditions.

[0045] In the method of this invention, dividing the high beam spot into several high beam illumination intervals means: dividing the high beam spot into several high beam illumination intervals according to the illumination range from the horizontal beam angle -ω at one edge to the horizontal beam angle ω at the other edge, that is, dividing -ω to ω into 2n+1 high beam illumination intervals, where the angle of each high beam illumination interval is respectively... Then there is 2ω represents the illumination range angle of the high beam headlight spot; where ω>0, n≥4. In this embodiment, the longitudinal planes opposite the vehicle body are taken as the plane of symmetry, with negative values ​​indicating the left side of the vertical plane of symmetry and positive values ​​indicating the right side of the vertical plane of symmetry.

[0046] Based on the focal length f of the high beam lens and the width a of the LED's emitting surface, the angle of each high beam illumination zone is calculated as follows: , , , ..., Since all the LED components are exactly the same, there are .

[0047] The specific adaptive headlight control method is as follows: control the high beam light source module 1, low beam light module 2, and high beam light source module 3 to project in the forward direction; measure the angle between the position of the vehicle in front and the position of the vehicle body in real time. :

[0048] when At that time, the included angle The right high beam illumination zone c, which is located at the boundary of the covered right high beam illumination zone 0 to c, is determined to be the high beam illumination zone where the vehicle in front is located. The illumination of the right high beam illumination zone c is turned off, while the illumination of the remaining high beam illumination zones and the low beam module 2 is kept on. Wherein, n≥c≥2.

[0049] when At that time, the included angle The left high beam illumination zone b, which is located at the boundary of the covered left high beam illumination zone 0 to b, is determined to be the high beam illumination zone of the vehicle in front. The illumination of the left high beam illumination zone b is turned off, while the illumination of the remaining high beam illumination zones and the low beam module 2 is kept on. Wherein, n≥b≥2.

[0050] This embodiment uses the division of -ω to ω into 9 high beam illumination zones as an example. The angles corresponding to the left high beam illumination zone 4, left high beam illumination zone 3, left high beam illumination zone 2, left high beam illumination zone 1, middle high beam illumination zone, right high beam illumination zone 1, right high beam illumination zone 2, right high beam illumination zone 3, and right high beam illumination zone 4 are as follows: The effect of all nine high-beam illumination zones in the high-beam light spot of this invention being fully illuminated is shown in the following diagram. Figure 7 As shown in the diagram, the lighting effect of controlling the right-side high beam illumination zone 3 to be turned off is as follows: Figure 8 As shown in the diagram, the lighting effect of controlling the right-side high beam illumination zone 2 to be turned off is as follows: Figure 9 As shown.

[0051] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. An adaptive light control method for vehicle headlights, characterized in that: A high beam headlight module 1, a low beam headlight module, and a high beam headlight module 2 are arranged side by side at the front of the vehicle body; the high beam headlight module 1 and the high beam headlight module 2 together form a continuous high beam headlight spot; the high beam headlight spot is divided into several high beam lighting zones, and each high beam lighting zone can be independently controlled to be lit or turned off; The adaptive headlight control method is as follows: control the high beam light source module 1, low beam light module and high beam light source module 2 to project in the forward direction; when a vehicle in the opposite direction enters several high beam lighting zones, measure the relative position of the vehicle in front and the parking space in real time, determine the high beam lighting zone in which the vehicle in front is located based on the relative position, and control the lighting of the high beam lighting zone to be turned off; at the same time, control the remaining high beam lighting zones and low beam light modules to keep the lights on, so as to realize the adaptive headlight control.

2. The adaptive light control method for vehicle headlights according to claim 1, characterized in that: When a vehicle in the opposite direction enters one of several high-beam illumination zones, the relative position of the vehicle in front and the parking space is measured in real time. Based on the relative position, the high-beam illumination zone in which the vehicle in front is located is determined, and the illumination in that high-beam illumination zone is turned off. At the same time, the remaining high-beam illumination zones and low-beam modules are kept illuminated. This adaptive headlight control means: When a vehicle in the opposite direction enters several high beam illumination zones, the angle between the position of the vehicle in front and the position of the vehicle body is measured in real time. The high beam illumination zone at the boundary of the high beam illumination zone covered by the angle is identified as the high beam illumination zone where the vehicle in front is located, and the illumination of the high beam illumination zone at the boundary is turned off. At the same time, the remaining high beam illumination zones and low beam modules are kept illuminated to achieve adaptive light control of the headlights. Here, with the longitudinal plane of the vehicle body as the plane of symmetry, the angle between the position of the vehicle in front and the position of the vehicle body refers to the angle between the line connecting the positions of the vehicle in front and the vehicle body and the vertical plane of symmetry.

3. The adaptive light control method for vehicle headlights according to claim 2, characterized in that: The high beam light source module one and the high beam light source module two respectively include a substrate, a high beam lens and several identical lamp bead assemblies; the high beam lens covers the substrate, and the several lamp bead assemblies are evenly arranged on the substrate in sequence, and the light emitted by the several lamp bead assemblies is directed toward the high beam lens and forms a light-emitting area; the focal point of the high beam lens is set at the center of the light-emitting area.

4. The adaptive light control method for vehicle headlights according to claim 3, characterized in that: The high beam light source module one and the high beam light source module two have the same lamp bead assembly structure, both including a lamp bead light-emitting surface and a lamp bead substrate; the lamp bead light-emitting surface is mounted on the lamp bead substrate and disposed on the substrate through the lamp bead substrate. In a row of closely arranged LED light-emitting surfaces, LED light-emitting surfaces are extracted at intervals. The extracted LED light-emitting surfaces are installed on the LED substrate as LED components of the high beam light source module one; the remaining LED light-emitting surfaces are installed on the LED substrate as LED components of the high beam light source module two.

5. The adaptive light control method for vehicle headlights according to claim 4, characterized in that: In the LED chip assemblies of high beam light source module one and high beam light source module two, the distance between the light-emitting surfaces of two adjacent LED chips is equal to the width of the light-emitting surface of one LED chip. The light-emitting surfaces of the LED beads in the high beam light source module one and the light-emitting surfaces of the LED beads in the low beam light source module two together form a continuous high beam light spot.

6. The adaptive light control method for vehicle headlights according to claim 4, characterized in that: The shape of the light-emitting surface of the lamp bead is rectangular; the width 'a' of the light-emitting surface of the lamp bead satisfies the following condition: 2a≥b+d; where b is the width of the lamp bead substrate, and d is the minimum gap that can be achieved between adjacent lamp bead substrates under actual production conditions.

7. The adaptive light control method for vehicle headlights according to claim 6, characterized in that: The division of the high beam spot into several high beam illumination zones means that the high beam spot is divided into several high beam illumination zones according to the illumination range from the horizontal beam angle -ω of one edge to the horizontal beam angle ω of the other edge; wherein, the longitudinal plane opposite the vehicle body is the plane of symmetry, negative values ​​indicate the left side of the vertical plane of symmetry of the vehicle body, and positive values ​​indicate the right side of the vertical plane of symmetry of the vehicle body.

8. The adaptive light control method for vehicle headlights according to claim 7, characterized in that: Divide the area from -ω to ω into 2n+1 high beam illumination intervals, with the angles of each high beam illumination interval being respectively... Then there is 2ω is the illumination range angle of the high beam spot; where ω>0, n≥4.

9. The adaptive light control method for vehicle headlights according to claim 8, characterized in that: Based on the focal length f of the high beam lens and the width a of the LED's emitting surface, the angle of each high beam illumination zone is calculated as follows: , , , ..., Since all the LED components are exactly the same, there are .

10. The adaptive light control method for vehicle headlights according to claim 9, characterized in that: The adaptive beam control method involves controlling the high beam light source module 1, the low beam light module, and the high beam light source module 2 to project light in a forward direction; and measuring in real time the angle between the position of the vehicle in front and the position of the vehicle body. : when At that time, the included angle The right-side high beam illumination zone c, which is located at the boundary of the covered right-side high beam illumination zone 0 to c, is determined to be the high beam illumination zone where the vehicle in front is located. The illumination of the right-side high beam illumination zone c is turned off, while the illumination of the other high beam illumination zones and low beam modules is kept on. Wherein, n≥c≥2. when At that time, the included angle The left high beam illumination zone b, which is located at the boundary of the covered left high beam illumination zone 0 to b, is determined to be the high beam illumination zone of the vehicle in front. The illumination of the left high beam illumination zone b is turned off, while the illumination of the other high beam illumination zones and low beam modules is kept on. Wherein, n≥b≥2.

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