A vehicle lamp module with ADB high beam function

Abstract

A kind of car lamp module with ADB high beam function, including lens, lens support, low beam light collector, high beam light collector, low beam light source, high beam light source and radiator, the upper end of high beam light collector is provided with bright-dark cutoff line forming piece;High beam light collector includes baffle and collimator, the front end of collimator is provided with light exit surface, the rear end is provided with multiple collimating units, the rear end of collimating unit is provided with light entrance surface;High beam light source contains multiple high beam LED chips, and a high beam LED chip corresponds to a light entrance surface;Baffle is provided with multiple light blocking teeth, baffle is arranged at the rear end of collimator, and makes light blocking tooth be located between two adjacent high beam LED chips, light blocking tooth is carried out light blocking to prevent light leakage;The utility model can effectively solve the problems existing in prior art.

Description

Technical Field

[0001] This utility model relates to the field of automotive lighting technology, and in particular to a vehicle headlight module with ADB high beam function. Background Technology

[0002] In recent years, with the continuous advancement of intelligent technology in the automotive lighting field, traditional automotive lighting is undergoing a transformation. In addition to the traditional low and high beam functions, automotive headlight systems can now also achieve features such as Adaptive Front-lighting System (AFS) and Adaptive Driving Beam (ADB), significantly improving driving safety and comfort.

[0003] Suitability.

[0004] ADB (Adaptive High Beam) high beam, also known as an adaptive high beam system, is currently implemented by pixelating the light emitted by each light source and then illuminating the road in zones to control dark areas. Creating specific dark areas on the road surface effectively reduces the glare hazard of high beams at night and lowers the accident rate. For example, Chinese patent CN208886647U discloses a vehicle headlight module with ADB functionality, including a lens, lens bracket, reflector, first LED module, heat sink, second LED module, and transparent baffle. The first and second LED modules are positioned behind the transparent baffle, and the lens is positioned in front of the transparent baffle. The first LED module and reflector are connected and fixed to the heat sink, and the second LED module is connected and fixed to the transparent baffle. The installation angle between the first and second LED modules is adjustable, and the lens is clipped onto the lens bracket. As can be seen from the above structure, there is no obstruction between the multiple second LED chips on the second LED module. When working, there is light leakage between them. When providing ADB high beam pattern with a dark area, if one or more second LED chips are turned off, the light provided by the adjacent working second LED chips will leak, resulting in a large amount of stray light in the dark area of ​​the ADB high beam pattern. This greatly affects the comfort of other drivers or pedestrians at night and reduces driving safety.

[0005] Furthermore, the 2024 version of the "C-NCAP Management Rules" officially came into effect on July 1, 2024. It evaluates the illumination range of the high beam headlights using five points on a vertical plane 100m in front of the headlights, with particular emphasis on point 3. Point 3 corresponds to coordinates of 0.45 degrees to the left / right and 5 degrees upward on a 25m screen, and a score of 5500 cd is considered perfect. We can further analyze the light pattern provided by the headlight module in high beam mode. Figure 1 As can be seen, the upper edge of the light pattern cannot reach 5 degrees, which means that point 3 cannot reach 5500 cd, directly affecting the C-NCAP evaluation score. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing a vehicle headlight module with ADB (Advanced Driver Assistance) high beam function, which can effectively solve the problems existing in the prior art.

[0007] This utility model is achieved through the following technical solution: a vehicle headlight module with ADB high beam function, including a lens, a lens bracket, a low beam concentrator, a high beam concentrator, a low beam light source, a high beam light source, and a heat sink. The front end of the heat sink is provided with a first mounting surface and a second mounting surface, with the first mounting surface located above the second mounting surface. The low beam light source and the low beam concentrator are respectively disposed on the first mounting surface, with the low beam concentrator located in front of the low beam light source. The high beam light source and the high beam concentrator are respectively disposed on the second mounting surface, with the high beam concentrator located in front of the high beam light source. A cut-off line forming element is provided at the upper end of the high beam concentrator. The light emitted by the low beam light source, after passing through the low beam concentrator, is blocked by the cut-off line forming element to form a low beam beam with a cut-off line. The light beam forms a near beam pattern after passing through the lens; the light emitted by the high beam source forms an ADB high beam beam after passing through the high beam concentrator, and the ADB high beam beam forms an ADB high beam illumination area after passing through the lens. The ADB high beam illumination area combines with the near beam pattern to form an ADB high beam pattern. The high beam concentrator includes a partition and a collimator. The collimator has a light-emitting surface at its front end and multiple collimating units at its rear end. The collimating units have a light-incident surface at their rear end. The high beam source includes multiple high beam LED chips, with one high beam LED chip corresponding to one light-incident surface. The partition has multiple light-blocking teeth. The partition is located at the rear end of the collimator, and the light-blocking teeth are positioned between two adjacent high beam LED chips to block light and prevent light leakage.

[0008] Furthermore, according to the vehicle headlight module with ADB high beam function of this utility model, the partition plate is provided with welding ribs, and is welded and fixed to the collimator by the welding ribs.

[0009] Furthermore, according to the vehicle headlight module with ADB high beam function of this utility model, the front end of the lens is provided with a lens light-emitting surface, which is composed of a collimation area and a diffusion area. The collimation area is used to ensure that the light from the ADB high beam illumination area and the low beam pattern within a 20-degree range to the left and right is collimated and emitted. The diffusion area is used to ensure that the light from the low beam pattern outside the 20-degree range to the left and right is diffused and emitted.

[0010] Furthermore, in the vehicle headlight module with ADB high beam function according to this utility model, the second mounting surface is inclined, forming an inclined angle b with the vertical line as a reference. By setting the inclined angle b, the light-emitting center of the high beam LED chip is deviated from the focal point of the lens.

[0011] Furthermore, according to the vehicle headlight module with ADB high beam function of this utility model, the heat sink is provided with forward-extending support feet on both sides of the first mounting surface, and the light and dark cut-off line forming part is fixed between the two support feet and located at the upper end of the collimator.

[0012] Furthermore, according to the vehicle headlight module with ADB high beam function of this utility model, the cut-off line forming component includes a substrate and a beam splitter. The beam splitter is made of 0.1mm stainless steel and has a cut-off line forming structure. The focal point of the lens falls on the cut-off line forming structure. The beam splitter is fixed to the upper surface of the substrate, which supports the beam splitter. A U-shaped clearance groove is provided at the front end of the substrate to reduce the thickness of the front end of the cut-off line forming component. The collimator also has a support portion above the light-emitting surface, which supports the front end of the beam splitter in the area corresponding to the U-shaped clearance groove.

[0013] Furthermore, according to the vehicle headlight module with ADB high beam function of this utility model, the light-emitting surface includes a high-light area and a non-high-light area. The high-light area is located above the non-high-light area, and the lower edge of the high-light area is connected to the upper edge of the non-high-light area. The high-light area is used to ensure the brightness of the high-light portion in the ADB high beam illumination area, and the non-high-light area is used to improve the uniformity of the ADB high beam illumination area.

[0014] Furthermore, according to the vehicle headlight module with ADB high beam function of this utility model, the area ratio of the high beam area to the low beam area is 2:3, and the low beam area is provided with fine texture.

[0015] Furthermore, according to the vehicle headlight module with ADB high beam function of this utility model, the lower edge of the non-high beam area is tapered backward and inward, so that the non-high beam area is tilted and the tilt angle α is formed with the longitudinal cross-section line of the high beam area as a reference. The non-high beam area changes the emission angle of the light by tilting, thereby adjusting the coverage range of the ADB high beam in the vertical direction.

[0016] Furthermore, according to the vehicle headlight module with ADB high beam function of this utility model, the cut-off line forming component is an end face of the collimator above the light-emitting surface, the end face is provided with a cut-off line forming structure, the focal point of the lens falls on the cut-off line forming structure, and a reflective layer is provided on the end face.

[0017] This utility model has a simple structure and is easy to install. First, by using a partition to block light leakage between adjacent high beam LED chips, it prevents a large amount of stray light from existing in the dark areas of the ADB high beam pattern, greatly improving the comfort of oncoming drivers or pedestrians at night and further enhancing driving safety. Second, by optimizing the lens structure, the illumination range of the low beam and ADB high beam patterns is expanded to the left and right, with good uniformity, further improving driving safety. Third, by optimizing the alignment device structure, the vertical illumination range of the ADB high beam illumination area is expanded, achieving a perfect score in point 3. Attached Figure Description

[0018] Figure 1 This is a front view of the present invention.

[0019] Figure 2 This is a perspective view of the present invention.

[0020] Figure 3 yes Figure 1 A schematic diagram of the cross-sectional structure of AA in Example 1.

[0021] Figure 4 This is an exploded view of the structure of Embodiment 1 of this utility model.

[0022] Figure 5 yes Figure 3 Enlarged view of the structure within the dashed box.

[0023] Figure 6 This is a perspective view of the high-beam concentrator in Embodiment 1 of this utility model.

[0024] Figure 7 This is a perspective view of the high-beam concentrator in Embodiment 1 of this utility model.

[0025] Figure 8 This is an exploded view of the high-beam concentrator in Embodiment 1 of this utility model.

[0026] Figure 9 This is the ADB high beam screen illuminance diagram provided by this utility model.

[0027] Figure 10 yes Figure 1 A schematic diagram of the cross-sectional structure of Example 2 AA.

[0028] In the picture:

[0029] Lens 1, lens light-emitting surface 11, collimation area 111, diffusion area 112, lens light-incident surface 12, lens bracket 2, low beam concentrator 3, high beam concentrator 4, partition 41, light-blocking teeth 411, welding rib 412, collimator 42, light-emitting surface 421, strong light area 4211, non-strong light area 4212, collimation unit 422, light-incident surface 4221, support part 423, low beam light source 5, high beam light source 6, high beam LED chip 61, heat sink 7, first mounting surface 71, second mounting surface 72, support foot 73, light and dark cutoff line forming part 8, substrate 81, U-shaped clearance groove 811, beam splitter 82, light and dark cutoff line forming structure 821, end face 83, limiting mechanism 9, limiting post 91, limiting hole 92, cooling fan 10. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Example 1

[0032] like Figure 1-9As shown, a vehicle headlight module with ADB (Advanced Driver Assistance) high beam function includes a lens 1, a lens bracket 2, a low beam concentrator 3, a high beam concentrator 4, a low beam light source 5, a high beam light source 6, and a heat sink 7. The front end of the heat sink 7 has a first mounting surface 71 and a second mounting surface 72, with the first mounting surface 71 positioned above the second mounting surface 72. The low beam light source 5 and the low beam concentrator 3 are respectively mounted on the first mounting surface 71, with the low beam concentrator 3 positioned in front of the low beam light source 5. The high beam light source 6 and the high beam concentrator 4 are respectively mounted on the second mounting surface 72, with the high beam concentrator 4 positioned in front of the high beam light source 6. A cut-off line forming element 8 is also provided at the upper end of the high beam concentrator 4. The light emitted from the low beam light source 5 is collimated by the low beam concentrator 3 and then passes through the cut-off line forming element 8 to form a low beam with a cut-off line. The low beam then passes through the lens 1 to form a low beam pattern with a cut-off line. The light emitted by the light source 6 is collimated by the high beam concentrator 4 to form an ADB high beam. The ADB high beam then passes through the lens 1 to form an ADB high beam illumination area. The ADB high beam illumination area is combined with the low beam pattern to form the ADB high beam pattern. The high beam concentrator 4 includes a partition 41 and a collimator 42. The collimator 42 has a light-emitting surface 421 at its front end and multiple collimation units 422 at its rear end. The collimation unit 422 has a light-incident surface 4221 at its rear end. The high beam light source 6 contains multiple high beam LED chips 61, with each high beam LED chip 61 corresponding to a light-incident surface 4221. The partition 41 has multiple light-blocking teeth 411. The partition 41 is located at the rear end of the collimator 42, and the light-blocking teeth 411 are positioned between two adjacent high beam LED chips 61 to block light and prevent light leakage between two adjacent high beam LED chips 61. Specifically, the partition 41 is provided with welding ribs 412, which are welded and fixed to the collimator 42, making installation more convenient and quick. In this embodiment, the collimator 42 is made of PMMI material, and the partition 41 is made of black PC material. The partition 41 is fixed to the collimator 42 by the provided welding ribs 412 and by laser welding process. The partition 41 and the collimator 42 are connected by a limiting mechanism 9, thereby improving the accuracy of the position of the light blocking teeth 411 and ensuring the quality of light blocking. The limiting mechanism 9 includes a limiting post 91 and a limiting hole 92. The limiting post 91 is inserted into the limiting hole 92, so that the collimator 42 is limited on the partition 41. In addition, in order to improve the heat dissipation effect, a cooling fan 10 is also provided at the rear end of the radiator 7. The cooling fan 10 accelerates the air circulation to improve the heat dissipation effect and further improves the service life of the headlight module. By replacing the reflector bowl with the low beam concentrator 3 and cooperating with the low beam light source 5, the light efficiency is higher and the quality of the low beam pattern can be improved.The low beam source 5 is electrically connected to the external low beam control system, and the high beam source 6 is electrically connected to the external ADB high beam control system. When an ADB high beam pattern is required, the low beam control system controls the low beam source 5 to work, while the external ADB high beam control system controls all the high beam LED chips 61 to work, thus obtaining the ADB high beam pattern. In addition, the external ADB high beam control system can control one or several high beam LED chips 61 to turn off according to the road scene, thus obtaining the required ADB high beam pattern with a dark area, which will not cause glare to road users in front of the vehicle. The light provided by the high beam LED chip 61 is blocked by the partition 41 to prevent a large amount of stray light in the dark area of ​​the ADB high beam pattern, greatly improving the comfort of oncoming drivers or pedestrians at night and further improving driving safety.

[0033] To improve the quality of the ADB high beam and low beam patterns, a lens emitting surface 11 is provided at the front end of the lens 1. The lens emitting surface 11 consists of a collimation area 111 and a diffusion area 112. The collimation area 111 is used to ensure that the light from the ADB high beam illumination area and the low beam pattern within a 20-degree range to the left and right is collimated and emitted. The diffusion area 112 is used to ensure that the light from the low beam pattern outside the 20-degree range to the left and right is diffused and emitted. Specifically, since there is no light outside the 20-degree range to the left and right of the ADB high beam illumination area, the diffusion area 112 can only act on the low beam pattern. The collimation area 111 ensures that the light from the ADB high beam illumination area and the low beam pattern is collimated within the 20-degree range to the left and right, while the diffusion area 112 ensures that the light from the low beam pattern outside the 20-degree range to the left and right is diffused. The resulting ADB high beam and low beam patterns are not scattered and have a regular shape within the 20-degree range, ensuring the illumination intensity of the light patterns. Outside the 20-degree range, the ADB high beam and low beam patterns have a certain degree of diffusion, expanding the illumination range to the left and right of the light patterns and ensuring the uniformity of the light patterns, further improving the quality of the ADB high beam and low beam patterns. In this embodiment, the illumination range to the left and right of the low beam pattern can reach more than 35 degrees, ensuring the uniformity of the light patterns. Since the low beam pattern is part of the ADB high beam pattern, the illumination range to the left and right of the ADB high beam pattern also reaches more than 35 degrees, further improving driving safety. The rear end of lens 1 is provided with a lens light-incident surface 12, which is a spherical surface with an R170mm radius to prevent sunlight from focusing and damaging the lens support 2. The lens light-out surface 11 is a freeform surface.

[0034] To achieve a smoother transition between the ADB high beam and low beam patterns, thereby improving the quality of the ADB high beam, the second mounting surface 72 is inclined, forming an angle b with the vertical line as a reference. This angle b causes the light-emitting center of the high beam LED chip 61 to deviate from the focal point of the lens 1, thus diffusing the ADB high beam towards the low beam, resulting in a smoother transition between the two patterns. In this embodiment, the angle b is 30 degrees, which yields the best results.

[0035] Furthermore, the heat sink 7 is provided with forward-extending support feet 73 on both sides of the first mounting surface 71. The cut-off line forming component 8 is fixed between the two support feet 73 and located at the upper end of the collimator 42. Specifically, the cut-off line forming component 8 includes a substrate 81 and a beam splitter 82. The beam splitter 82 is made of 0.1mm stainless steel and has a cut-off line forming structure 821. The focal point of the lens 1 falls on the cut-off line forming structure 821. The beam splitter 82 is fixed to the upper surface of the substrate 81, which supports the beam splitter 82. At the same time, a U-shaped clearance groove 811 is provided at the front end of the substrate 81. The U-shaped clearance groove 811 is used to reduce the thickness of the front end of the cut-off line forming component 8, so as to avoid excessive thickness blocking light and forming a dark spot between the ADB high beam illumination area and the low beam pattern, thereby further improving the quality of the ADB high beam pattern. In this embodiment, in order to prevent the beam splitter 82 in the area corresponding to the U-shaped clearance groove 811 from sinking and deforming due to the lack of support from the substrate 81, resulting in a decrease in the quality of the near beam pattern, the collimator 42 is also provided with a support part 423 above the light-emitting surface 421. The support part 423 is used to support the front end of the beam splitter 82 in the area corresponding to the U-shaped clearance groove 811, thereby further improving the quality of the near beam pattern.

[0036] Furthermore, the light-emitting surface 421 includes a high-intensity light area 4211 and a low-intensity light area 4212. The high-intensity light area 4211 is located above the low-intensity light area 4212, and the lower edge of the high-intensity light area 4211 is connected to the upper edge of the low-intensity light area 4212. The high-intensity light area 4211 is used to ensure the brightness of the high-intensity light portion in the ADB high-beam illumination area, while the low-intensity light area 4212 is used to improve the uniformity of the ADB high-beam illumination area. Specifically, the area ratio of the high-intensity light area 4211 to the low-intensity light area 4212 is 2:3. In this embodiment, the low-intensity light area 4212 is provided with a fine texture. The fine texture improves the uniformity of light, making the transition between each section in the ADB high-beam illumination area smoother, and further improving the quality of the ADB high-beam illumination area.

[0037] To expand the vertical illumination range of the ADB high beam illumination area and meet the evaluation requirements for point 3 in C-NCAP, the lower edge of the non-high-intensity area 4212 is tapered inward, making it tilted. An angle α is formed with the longitudinal cross-section of the high-intensity area 4211 as a reference. This tilting of the non-high-intensity area 4212 alters the light emission angle, thereby adjusting the vertical coverage of the ADB high beam. In this embodiment, the angle α is 17 degrees. This tilt angle allows the light to diffuse upwards, resulting in an ADB high beam illumination area reaching 7 degrees above the beam. The test result at point 3 on a 25m screen is 5532 cd. Since a score of 5500 cd is considered perfect, this solves the problem in existing technologies where the light cannot reach point 3, thus preventing point 3 from reaching 5500 cd and directly affecting the C-NCAP evaluation score.

[0038] Example 2

[0039] like Figure 10 As shown, unlike Embodiment 1, the cutoff line forming component 8 is an end face 83 provided above the light-emitting surface 421 of the collimator 42. The cutoff line forming structure 821 is provided on the end face 83, and the focal point of the lens 1 falls on the cutoff line forming structure 821. A reflective layer is provided on the end face 83. By combining the cutoff line forming component 8 and the collimator 42 into one, the positioning accuracy of the optical component is improved and the production cost is reduced.

Claims

1. A vehicle headlight module with ADB (Adaptive High Beam) function, characterized in that, The device includes a lens, a lens holder, a low beam concentrator, a high beam concentrator, a low beam source, a high beam source, and a heat sink. The heat sink has a first mounting surface and a second mounting surface at its front end, with the first mounting surface above the second mounting surface. The low beam source and the low beam concentrator are respectively mounted on the first mounting surface, with the low beam concentrator located in front of the low beam source. The high beam source and the high beam concentrator are respectively mounted on the second mounting surface, with the high beam concentrator located in front of the high beam source. A cutoff line forming element is provided at the upper end of the high beam concentrator. The light emitted from the low beam source passes through the low beam concentrator and is then blocked by the cutoff line forming element to form a low beam with a cutoff line. The low beam then passes through the lens to form a low beam pattern. The light emitted by the high beam source is focused by the high beam concentrator to form an ADB high beam. The ADB high beam then passes through the lens to form an ADB high beam illumination area. This ADB high beam illumination area combines with the low beam pattern to form an ADB high beam pattern. The high beam concentrator includes a partition and a collimator. The collimator has a light-emitting surface at its front end and multiple collimating units at its rear end. Each collimating unit has a light-incident surface at its rear end. The high beam source contains multiple high beam LED chips, with each high beam LED chip corresponding to one light-incident surface. The partition has multiple light-blocking teeth at its rear end, positioned between two adjacent high beam LED chips to block light and prevent light leakage.

2. A vehicle headlight module with ADB high beam function according to claim 1, characterized in that, The partition plate is provided with welding ribs, which are then welded and fixed to the collimator.

3. A vehicle headlight module with ADB high beam function according to claim 1, characterized in that, The front end of the lens is provided with a light-emitting surface, which consists of a collimation area and a diffusion area. The collimation area is used to ensure that the light from the ADB high beam illumination area and the low beam pattern within a 20-degree range to the left and right is collimated and emitted. The diffusion area is used to ensure that the light from the low beam pattern outside the 20-degree range to the left and right is diffused and emitted.

4. A vehicle headlight module with ADB high beam function according to claim 1, characterized in that, The second mounting surface is inclined, forming an angle b with the vertical line as a reference. By setting the angle b, the light-emitting center of the high beam LED chip is deviated from the focal point of the lens.

5. A vehicle headlight module with ADB high beam function according to claim 1, characterized in that, The radiator has forward-extending support feet on both sides of the first mounting surface, and the light and dark cutoff line molding is fixed between the two support feet and located at the upper end of the collimator.

6. A vehicle headlight module with ADB high beam function according to claim 5, characterized in that, The cutoff line forming component includes a substrate and a beam splitter. The beam splitter is made of 0.1mm stainless steel and has a cutoff line forming structure. The focal point of the lens falls on the cutoff line forming structure. The beam splitter is fixed to the upper surface of the substrate, which supports the beam splitter. A U-shaped clearance groove is provided at the front end of the substrate to reduce the thickness of the front end of the cutoff line forming component. The collimator also has a support portion above the light-emitting surface to support the front end of the beam splitter in the area corresponding to the U-shaped clearance groove.

7. A vehicle headlight module with ADB high beam function according to claim 1, characterized in that, The light-emitting surface includes a high-intensity light area and a low-intensity light area. The high-intensity light area is located above the low-intensity light area. The lower edge of the high-intensity light area is connected to the upper edge of the low-intensity light area. The high-intensity light area is used to ensure the brightness of the high-intensity light portion in the ADB high-beam illumination area, and the low-intensity light area is used to improve the uniformity of the ADB high-beam illumination area.

8. A vehicle headlight module with ADB high beam function according to claim 7, characterized in that, The area ratio of the strong light area to the non-strong light area is 2:3, and the non-strong light area is provided with fine skin texture.

9. A vehicle headlight module with ADB high beam function according to claim 8, characterized in that, The lower edge of the non-strong light area curves inward, making the non-strong light area tilted. An angle α is formed with the longitudinal cross-section of the strong light area as a reference. The tilting of the non-strong light area changes the emission angle of the light, thereby adjusting the coverage of the ADB high beam in the vertical direction.

10. A vehicle headlight module with ADB high beam function according to claim 1, characterized in that, The cut-off line forming component is an end face of the collimator above the light-emitting surface. The end face is provided with a cut-off line forming structure, the focal point of the lens falls on the cut-off line forming structure, and a reflective layer is provided on the end face.

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