Low-beam illumination module and vehicle lamp

Abstract

The invention discloses a low-beam illumination module and a car lamp, and relates to the technical field of car lamps. The low-beam illumination module comprises a light source, a reflection bowl and an optical lens; the reflecting bowl partially surrounds the light source, and the reflecting surface of the reflecting bowl is configured to reflect and converge light rays emitted by the light source to form collimated light rays which are projected to the optical lens; the focus of the optical lens is located on the edge, close to the light source, of the reflecting face of the reflecting bowl, the optical lens is configured to project collimated light formed by the reflecting face of the reflecting bowl into a low-beam light shape, and the edge, close to the light source, of the reflecting face of the reflecting bowl is projected into a cut-off line of the low-beam light shape. Moreover, the reflecting surface of the reflecting bowl comprises at least two sub-reflecting surfaces which are sequentially connected along the direction around the light source, and a step is formed at the joint of every two adjacent sub-reflecting surfaces, so that the cut-off line of the passing light shape is provided with a step, and the requirements of laws and regulations are met; therefore, a shading plate for blocking light to form a cutoff line of a passing light shape is not needed, the optical efficiency is higher, and the size and the weight are obviously reduced.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle lamps, and in particular to a low-beam lighting module and a vehicle lamp. Background Art

[0002] Nowadays, automotive lamps are constantly developing in the direction of smaller sizes. For example, the size of the high and low beam modules has been reduced from the original diameter of 60mm to 40mm. Some existing ultra-narrow low beam modules are only 10mm-20mm high.

[0003] As the size of the low beam lighting module decreases, its system efficiency and light pattern width are greatly challenged, especially the low system efficiency. Figure 1 Taking the existing low beam lighting module as an example, the low beam lighting module includes a light source, a reflector, a shading plate and an optical lens. The reflector is ellipsoidal, the light emission center of the light source is set at the near focus of the ellipsoidal reflector, the light emitted by the light source is reflected by the ellipsoidal reflector and converges near the far focus of the ellipsoidal reflector, the shading plate is set at the far focus of the ellipsoidal reflector, and its shape is consistent with the required light and dark cut-off line shape, and finally a quasi-parallel light illumination light shape with a light and dark cut-off line is formed through the optical lens. However, since the surface split light emitted by the light source is blocked by the shading plate, the optical efficiency of the system is low, and the optical lens is far away from the reflector, which is not conducive to reducing the size and weight of the low beam lighting module.

[0004] Therefore, how to improve the optical efficiency of the low beam lighting module and reduce the size and weight of the low beam lighting module has become a technical problem that needs to be urgently solved by those skilled in the art. Summary of the invention

[0005] In order to solve the above technical problems, the embodiments of the present application provide a low beam lighting module and a vehicle light to improve the optical efficiency of the low beam lighting module and reduce the size and weight of the low beam lighting module.

[0006] To achieve the above objectives, the present application provides the following technical solutions:

[0007] A low beam lighting module comprises a light source, a reflection bowl and an optical lens which are sequentially arranged along a light path transmission direction;

[0008] The reflective bowl partially surrounds the light source, and the reflective surface of the reflective bowl includes at least two sub-reflective surfaces connected in sequence along the direction surrounding the light source, and a step is formed at the connection between two adjacent sub-reflective surfaces; the reflective surface of the reflective bowl is configured to reflect and converge the light emitted by the light source to form collimated light to be projected onto the optical lens;

[0009] The focus of the optical lens is located on the edge of the reflective surface of the reflective bowl close to the light source. The optical lens is configured to project the collimated light into a low beam light shape, and the edge of the reflective surface of the reflective bowl close to the light source is projected as a cutoff line of the low beam light shape.

[0010] Optionally, two adjacent sub-reflecting surfaces form a vertical step or an inclined step at a connection point between the two adjacent sub-reflecting surfaces.

[0011] Optionally, edges of the sub-reflecting surfaces of the reflective bowl close to the light source are located in the same plane.

[0012] Optionally, the reflective surface of the reflective bowl includes two sub-reflective surfaces connected in sequence along a direction surrounding the light source, and the focus of the optical lens is located on an edge of the step between the two sub-reflective surfaces close to the light source.

[0013] Optionally, the reflective surface of the reflective bowl includes a first sub-reflective surface, a second sub-reflective surface and a third sub-reflective surface which are sequentially connected in a direction surrounding the light source, and the first sub-reflective surface and the third sub-reflective surface are located on a side of the second sub-reflective surface close to the light source.

[0014] Optionally, a step height between the first sub-reflecting surface and the second sub-reflecting surface is different from a step height between the second sub-reflecting surface and the third sub-reflecting surface.

[0015] Optionally, the area of ​​the first sub-reflecting surface is larger than the area of ​​the second sub-reflecting surface, and the area of ​​the third sub-reflecting surface is larger than the area of ​​the second sub-reflecting surface.

[0016] Optionally, the sub-reflecting surface is a parabola-like surface.

[0017] Optionally, the optical lens has a non-rotationally symmetric structure.

[0018] A vehicle lamp comprises the low beam lighting module described in any one of the above items.

[0019] Compared with the prior art, the above technical solution has the following advantages:

[0020] The low-beam lighting module provided in the embodiment of the present application includes a light source, a reflective bowl and an optical lens arranged in sequence along the transmission direction of the light path; the reflective bowl partially surrounds the light source, and the reflective surface of the reflective bowl is configured to reflect and converge the light emitted by the light source to form collimated light that is projected onto the optical lens; the focus of the optical lens is located on the edge of the reflective surface of the reflective bowl close to the light source, and the optical lens is configured to project the collimated light formed by the reflection and convergence of the reflective surface of the reflective bowl into a low-beam light shape, and the edge of the reflective surface of the reflective bowl close to the light source is projected as a cutoff line of the low-beam light shape; and the reflective surface of the reflective bowl includes at least two sub-reflective surfaces connected in sequence along the direction surrounding the light source, and two adjacent sub-reflective surfaces are connected in sequence along the direction surrounding the light source. The sub-reflecting surfaces form a step at the connection between the two, so a step is also formed between the edges of the two adjacent sub-reflecting surfaces close to the light source, and further, the step between the edges of the two adjacent sub-reflecting surfaces close to the light source is projected onto the cutoff line of the low beam light shape, so that the cutoff line of the low beam light shape meets regulatory requirements; in this way, there is no need to set a visor to block the light to form the cutoff line of the low beam light shape. After the light emitted from the light source is reflected and converged by the reflective surface of the reflective bowl, it can almost all pass through the optical lens to form the low beam light shape, so that the optical efficiency of the low beam lighting module can be significantly improved, and the optical lens can be closer to the reflective bowl, which also significantly reduces the volume and weight of the low beam lighting module. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of an existing low beam lighting module;

[0023] Figure 2 A schematic diagram of the structure of a low beam lighting module provided in an embodiment of the present application at a viewing angle;

[0024] Figure 3 A schematic diagram of the structure of a low-beam lighting module provided in an embodiment of the present application at another viewing angle;

[0025] Figure 4 A schematic structural diagram of a reflective bowl and an optical lens in a low-beam lighting module provided in an embodiment of the present application at another viewing angle;

[0026] Figure 5 A schematic structural diagram of a reflective bowl in a low-beam lighting module provided in an embodiment of the present application at another viewing angle;

[0027] Figure 6 An enlarged schematic diagram of a step between two sub-reflective surfaces in a reflective surface of a reflective bowl in a low-beam lighting module provided in an embodiment of the present application;

[0028] Figure 7 A schematic diagram of a low beam light shape formed when there is a vertical step between two adjacent sub-reflection surfaces in a reflective surface of a reflective bowl in a low beam lighting module provided in an embodiment of the present application;

[0029] Figure 8 A schematic diagram of a low beam light shape formed when there is an inclined step with a smaller inclination angle between two adjacent sub-reflection surfaces in the reflective surface of a reflective bowl in a low beam lighting module provided in an embodiment of the present application;

[0030] Fig. 9 A schematic diagram of a low beam light shape formed when there is an inclined step with a relatively large inclination angle between two adjacent sub-reflection surfaces in a reflective surface of a reflective bowl in a low beam lighting module provided in an embodiment of the present application;

[0031] Fig.10 A schematic diagram of a simulated low beam light shape formed when there is an inclined step between two adjacent sub-reflective surfaces in a reflective surface of a reflective bowl in a low beam lighting module provided in an embodiment of the present application;

[0032] Fig.11 for Fig.10 A partial enlarged schematic diagram of the low beam light shape is shown;

[0033] Fig.12 A front schematic diagram of a reflective surface of a reflective bowl in a low-beam lighting module provided in an embodiment of the present application;

[0034] Fig.13 A schematic diagram of the structure of a reflective bowl in another low-beam lighting module provided in an embodiment of the present application at a viewing angle;

[0035] Fig.14 A schematic diagram of a low beam light shape formed when a reflective surface of a reflective bowl in another low beam lighting module provided by an embodiment of the present application has two steps;

[0036] Fig.15 A schematic diagram of a simulation of a low beam light shape formed when a reflective surface of a reflective bowl in another low beam lighting module provided in an embodiment of the present application has two steps. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only one embodiment of the present application, not a comprehensive embodiment. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0039] As described in the background technology section, how to improve the optical efficiency of the low beam lighting module and reduce the size and weight of the low beam lighting module has become a technical problem that needs to be urgently solved by those skilled in the art.

[0040] In view of this, an embodiment of the present application provides a low beam lighting module. Figure 2 and Figure 3 FIG. 4 shows a schematic diagram of the structure of a low beam lighting module provided in an embodiment of the present application under two viewing angles, such as Figure 2 and Figure 3 As shown, the low beam lighting module includes a light source 10, a reflective bowl 20 and an optical lens 30 which are sequentially arranged along the light transmission direction.

[0041] like Figure 2 and Figure 3 As shown, the reflective bowl 20 partially surrounds the light source 10 , and the surface of the reflective bowl 20 facing the light source 10 is a reflective surface 200 . Figure 4 The figure further shows another perspective diagram of the reflective bowl 20 and the optical lens 30 in the low beam lighting module provided by the embodiment of the present application. Figure 5 Further illustrating another perspective diagram of a reflective bowl 20 in a low beam lighting module provided in an embodiment of the present application, combined with Figure 2-Figure 5 As shown, the reflective surface 200 of the reflective bowl 20 includes at least two sub-reflective surfaces 201 connected in sequence along the direction surrounding the light source 10, and two adjacent sub-reflective surfaces 201 form a step at the connection between the two, or in other words, two adjacent sub-reflective surfaces 201 are connected by a step surface 202.

[0042] In an embodiment of the present application, the reflective surface 200 of the reflective bowl 20 is configured to reflect and converge the light emitted by the light source 10 to form collimated light that is projected onto the optical lens 30. That is, the sub-reflective surface 201 and the step surface 202 are both configured to reflect and converge the light emitted by the light source 10 to form collimated light that is projected onto the optical lens 30.

[0043] Optionally, the sub-reflection surface 201 may be a parabola-like surface to reflect and converge the light emitted by the light source 10 to form collimated light to be projected onto the optical lens 30 .

[0044] In the embodiments of the present application, Figure 3 As shown, after the light emitted by the light source 10 is reflected and converged by the reflective surface 200 of the reflective bowl 20 , the collimated light formed is approximately parallel light, and the approximately parallel light is incident on the optical lens 30 .

[0045] Combination Figure 2-Figure 5 As shown, the edge 210 of the reflective surface 200 of the reflective bowl 20 close to the light source 10 includes an edge 211 of the sub-reflective surface 201 close to the light source 10 and an edge 212 of the step surface 202 close to the light source 10. It can be understood that since a step is formed at the connection between two adjacent sub-reflective surfaces 201, a step is also formed between the edges 211 of two adjacent sub-reflective surfaces 201 close to the light source 10.

[0046] In the examples of this application, refer to Figure 1-Figure 5 As shown, the focus of the optical lens 30 is located on the edge 210 of the reflective surface 200 of the reflective bowl 20 close to the light source 10. The optical lens 30 is configured to project the collimated light emitted by the light source 10 and formed by reflection and convergence of the reflective surface 200 of the reflective bowl 20 into a low beam light shape, and the edge 210 of the reflective surface 200 of the reflective bowl 20 close to the light source 10 is projected as the cutoff line of the low beam light shape. Since two adjacent sub-reflective surfaces 201 in the reflective surface 200 of the reflective bowl 20 form a step at the connection between the two, a step is also formed between the edges 211 of the two adjacent sub-reflective surfaces 201 close to the light source 10, and then, the step between the edges 211 of the two adjacent sub-reflective surfaces 201 close to the light source 10 is projected on the cutoff line of the low beam light shape, so that the cutoff line of the low beam light shape meets the regulatory requirements.

[0047] It can be seen that, unlike the existing low-beam lighting module, the low-beam lighting module provided in the embodiment of the present application, on the one hand, configures the reflective surface 200 of the reflective bowl 20 to reflect and converge the light emitted by the light source 10 to form collimated light that is projected onto the optical lens 30, and the focus of the optical lens 30 is located on the edge 210 of the reflective surface 200 of the reflective bowl 20 close to the light source 10, so that the optical lens 30 projects the collimated light into a low-beam light shape, and the edge 210 of the reflective surface 200 of the reflective bowl 20 close to the light source 10 is projected as a cutoff line of the low-beam light shape; on the other hand, the reflective surface 200 of the reflective bowl 20 is provided to include at least two sub-reflective surfaces 201 connected in sequence along the direction surrounding the light source 10, and two adjacent sub-reflective surfaces 201 are at A step is formed at the connection between the two, so a step is also formed between the edges 211 of the two adjacent sub-reflecting surfaces 201 close to the light source 10, and further, the step between the edges 211 of the two adjacent sub-reflecting surfaces 201 close to the light source 10 is projected onto the cutoff line of the low beam light shape, so that the cutoff line of the low beam light shape meets the regulatory requirements; in this way, there is no need to set a sunshade to block the light to form the cutoff line of the low beam light shape. After the light emitted from the light source 10 is reflected and converged by the reflective surface 200 of the reflective bowl 20, it can almost all pass through the optical lens 30 to form the low beam light shape, so that the optical efficiency of the low beam lighting module is significantly improved, and the optical lens 30 can be closer to the reflective bowl 20, so that the volume and weight of the low beam lighting module are significantly reduced.

[0048] In order to better understand this application, Figure 6 Further shown is an enlarged schematic diagram of a step between two sub-reflective surfaces 201 in a reflective surface 200 of a reflective bowl 20 in a low beam lighting module provided in an embodiment of the present application, with reference to Figure 6 It can be understood that in the reflective surface 200 of the reflective bowl 20, two adjacent sub-reflective surfaces 201 can form a vertical step at the connection between the two, that is, the two adjacent sub-reflective surfaces 201 are connected by a vertical step surface, and the edge of the vertical step surface close to the light source 10 is 212A. At this time, the schematic diagram of the low beam light shape formed by the low beam lighting module is as shown in Figure 7 As shown, it can be seen that the cut-off line of the formed low beam light shape has a vertical step.

[0049] refer to Figure 6 It can also be understood that in the reflecting surface 200 of the reflecting bowl 20, two adjacent sub-reflecting surfaces 201 can form an inclined step at the connection between the two, that is, the two adjacent sub-reflecting surfaces 201 are connected by an inclined step surface, and the inclination angle of the inclined step surface can be set according to regulatory requirements. Figure 6 In the embodiment, an edge of an inclined step surface with a smaller inclination angle close to the light source 10 is 212B. At this time, a schematic diagram of a low beam light shape formed by the low beam lighting module is as shown in FIG. Figure 8As shown, it can be seen that the cut-off line of the formed low beam light shape has an inclined step with a smaller inclination angle. Figure 6 In the embodiment, an edge of an inclined step surface with a larger inclination angle close to the light source 10 is 212C. At this time, a schematic diagram of a low beam light shape formed by the low beam lighting module is as shown in FIG. Fig. 9 As shown, it can be seen that the cut-off line of the formed low beam light shape has an inclined step with a relatively large inclination angle.

[0050] Fig.10 The figure shows a schematic diagram of a simulated low beam light shape formed when there is an inclined step between two adjacent sub-reflective surfaces 201 in the reflective surface 200 of the reflective bowl 20 in the low beam lighting module provided in the embodiment of the present application. Fig.11 for Fig.10 From the partially enlarged schematic diagram of the low beam light shape shown, it can be seen that the cutoff line of the low beam light shape formed has a step, and whether the step is vertical or inclined and the inclination angle can be set by setting the inclination angle of the step surface 202 between two adjacent sub-reflection surfaces 201.

[0051] Fig.12 FIG. 2 shows a front view of a reflective surface 200 of a reflective bowl 20 in a low beam lighting module provided in an embodiment of the present application. Fig.12 As shown, optionally, the edges 211 of each sub-reflection surface 201 of the reflection bowl 20 close to the light source 10 are located in the same plane, that is, the edges 211 of each sub-reflection surface 201 of the reflection bowl 20 close to the light source 10 are flush, and because the edges 211 of each sub-reflection surface 201 of the reflection bowl 20 close to the light source 10 are flush, the edges 211 of each sub-reflection surface 201 of the reflection bowl 20 close to the light source 10 and the edges 212 of the step surface 202 between two adjacent sub-reflection surfaces 201 close to the light source 10 are all flush and located in the same plane. Such a setting, on the one hand, makes it difficult for the reflection surface 200 of the reflection bowl 20 to leak light close to the light source 10, further improving the optical efficiency of the low beam lighting module; on the other hand, it makes the manufacture of the reflection bowl 20 easier, that is, the reflection surface 200 of the reflection bowl 20 can be flush with the edge 211 of the light source 10.

[0052] like Figure 2-Figure 5As shown, optionally, in some embodiments of the present application, the reflective surface 200 of the reflective bowl 20 includes two sub-reflective surfaces 201 connected in sequence along the direction around the light source 10, and the two sub-reflective surfaces 201 form a step at the connection between the two. On this basis, optionally, the focus of the optical lens 30 can be set on the edge of the step between the two sub-reflective surfaces 201 close to the light source 10, that is, the focus of the optical lens 30 is set on the edge 212 of the step surface 202 connecting the two sub-reflective surfaces 201 close to the light source 10. In this way, the corresponding step area in the cutoff line of the formed low beam light shape can be made clearer.

[0053] Optionally, in other embodiments of the present application, Fig.13 As shown, Fig.13 A schematic structural diagram of a reflective bowl 20 in another low-beam lighting module provided in an embodiment of the present application is shown. It can be seen that the reflective surface 200 of the reflective bowl 20 may also include a first sub-reflective surface 201A, a second sub-reflective surface 201B and a third sub-reflective surface 201C that are sequentially connected along the direction surrounding the light source 10. In this way, the first sub-reflective surface 201A and the second sub-reflective surface 201B form a step at the connection between the two, and the second sub-reflective surface 201B and the third sub-reflective surface 201C also form a step at the connection between the two, and the first sub-reflective surface 201A and the third sub-reflective surface 201C are located on the side of the second sub-reflective surface 201B close to the light source 10. Therefore, in the process of going from the first sub-reflective surface 201A to the second sub-reflective surface 201B to the third sub-reflective surface 201C, the reflective surface 201A will first pass through the lower step between the first sub-reflective surface 201A and the second sub-reflective surface 201B, and then pass through the upper step between the second sub-reflective surface 201B and the third sub-reflective surface 201C.

[0054] Accordingly, if Fig.13As shown, the edge of the first sub-reflecting surface 201A close to the light source 10 is 211A, the edge of the second sub-reflecting surface 201B close to the light source 10 is 211B, and the edge of the third sub-reflecting surface 201C close to the light source 10 is 211C, and there is a step between the edge 211A of the first sub-reflecting surface 201A close to the light source 10 and the edge 211B of the second sub-reflecting surface 201B close to the light source 10, specifically, the step surface 202 between the first sub-reflecting surface 201A and the second sub-reflecting surface 201B close to the light source 10 is 212; Similarly, there is also a step between the edge 211B of the second sub-reflecting surface 201B close to the light source 10 and the edge 211C of the third sub-reflecting surface 201C close to the light source 10, specifically, the step surface 202 between the second sub-reflecting surface 201B and the third sub-reflecting surface 201C is close to the edge 212 of the light source 10. Therefore, in the process of going from edge 211A to edge 211B to edge 211C, the user will first pass through the lower step between edge 211A and edge 211B, and then pass through the upper step between edge 211B and edge 211C.

[0055] Fig.14 FIG. 1 is a schematic diagram showing a low beam light shape formed by the low beam lighting module provided in this embodiment, such as Fig.14 As shown, the cut-off line in the low beam light shape formed by the low beam lighting module provided in this embodiment has two steps, first sinking and then rising, so as to meet different light shape requirements.

[0056] Fig.15 FIG. 4 shows a simulation schematic diagram of the low beam light shape formed by the low beam lighting module provided in this embodiment, such as Fig.15 As shown, it can also be seen that the cut-off line in the low beam light shape formed by the low beam lighting module provided in this embodiment has two steps, first sinking and then rising, so as to meet different light shape requirements.

[0057] It should be noted that, in this embodiment, the reflective surface 200 of the reflective bowl 20 includes three sub-reflective surfaces 201 connected in sequence along the direction surrounding the light source 10, and there are two steps between the three sub-reflective surfaces 201, one of which is to make the corresponding step in the cutoff line of the formed low-beam light shape meet the regulatory requirements, and the other step is to meet the light shape requirements. In this way, similar to the case where the reflective surface 200 of the aforementioned reflective bowl 20 includes two sub-reflective surfaces 201 (with one step), the focus of the optical lens 30 can be set on the edge of the step between the two sub-reflective surfaces 201 close to the light source 10. The step between the two sub-reflective surfaces 201 is close to the edge of the light source 10, that is, the step in the cutoff line of the formed low-beam light shape that needs to meet the regulatory requirements, so that the step area in the cutoff line of the formed low-beam light shape that needs to meet the regulatory requirements is clearer.

[0058] Further optional, such as Fig.13 As shown, the step height between the first sub-reflecting surface 201A and the second sub-reflecting surface 201B is different from the step height between the second sub-reflecting surface 201B and the third sub-reflecting surface 201C. Thus, corresponding to the cut-off line of the formed low beam light shape, as shown in FIG. Fig.14 and Fig.15 As shown, the heights of the two steps in the cut-off line of the formed low beam light shape may also be different, so as to meet different light shape requirements.

[0059] Further optional, such as Fig.13 As shown, the area of ​​the first sub-reflecting surface 201A is larger than the area of ​​the second sub-reflecting surface 201B, and the area of ​​the third sub-reflecting surface 201C is larger than the area of ​​the second sub-reflecting surface 201B. Thus, corresponding to the cut-off line of the formed low beam light shape, as shown in FIG. Fig.14 and Fig.15 As shown, the widths of the two steps in the cut-off line of the formed low beam light shape may also be different, so as to meet different light shape requirements.

[0060] It should be noted that in Figure 1 In the conventional low beam lighting module shown, the focus of the optical lens is located at the shading plate, and the optical lens is a rotationally symmetrical structure, so that the light not blocked by the shading plate can be projected out to form a low beam light shape. Figure 2-Figure 4 As shown, since the reflective surface 200 of the reflective bowl 20 is configured to reflect and converge the light emitted by the light source 10, forming collimated light to be projected to the optical lens 30, these collimated light can be relatively concentrated in a partial area of ​​the rotationally symmetrical optical lens, such as Figure 2-Figure 4 The upper half area of ​​the rotationally symmetric optical lens shown, that is, in the embodiment of the present application, the optical lens 30 can be a non-rotationally symmetric structure. The size of the non-rotationally symmetric optical lens 30 can be smaller than the rotationally symmetric optical lens used in the existing low beam lighting module, thereby further reducing the volume and weight of the low beam lighting module and reducing costs.

[0061] It should also be noted that, in the embodiment of the present application, the light source 10 may be a light emitting diode, the low beam lighting module may further include a printed circuit board 11, the light source 10 may be welded on the printed circuit board 11, and the printed circuit board 11 may drive the light source 10 to emit light.

[0062] In summary, the low beam lighting module provided in the embodiment of the present application is Figure 1 The existing low beam lighting module shown has the following advantages:

[0063] First, the reflector in the existing low beam lighting module is an ellipsoidal reflector, the light source is located at one focus of the ellipsoidal reflector, and the light reflected by the ellipsoidal reflector converges at the shading plate located at another focus. In the embodiment of the present application, the reflective surface 200 of the reflective bowl 20 can be a parabola-like surface, which reflects and converges the light emitted by the light source 10 to form collimated light that is incident on the optical lens 30.

[0064] Second, the existing low beam lighting module uses a shading plate to form the cutoff line of the low beam light shape. In the embodiment of the present application, the cutoff line of the low beam light shape is formed by the shape of the reflective surface 200 of the reflective bowl 20 close to the edge of the light source 10, and the reflective surface 200 of the reflective bowl 20 includes at least two sub-reflective surfaces 201. By setting a step between two adjacent sub-reflective surfaces 201, a step is formed on the cutoff line of the low beam light shape, which meets the regulatory requirements.

[0065] Third, the focus of the optical lens in the existing low beam lighting module is located at the shading plate, and the optical lens is a rotationally symmetrical structure. In the embodiment of the present application, the focus of the optical lens 30 is located on the edge of the reflective surface 200 of the reflective bowl 20 close to the light source 10, and the optical lens 30 can be a non-rotationally symmetrical structure, and the size can be smaller.

[0066] Fourth, because there is no need to set a shading plate to block the light, it is equivalent to integrating the features of the shading plate on the reflective bowl 20, so the optical efficiency of the low beam lighting module provided in the embodiment of the present application is higher, and the distance between the optical lens 30 and the reflective bowl 20 can be closer, so that the volume and weight of the low beam lighting module can be reduced.

[0067] Based on the same inventive concept, the embodiment of the present application further provides a vehicle lamp, which includes the low beam lighting module provided by any of the above embodiments. Since the low beam lighting module has been described in detail in the above embodiments, it will not be repeated here.

[0068] In this specification, each aspect is described in a combination of parallel and progressive manners. Each aspect focuses on the differences from other aspects, and the same or similar aspects between different aspects can be referenced to each other.

[0069] With respect to the above description of the disclosed embodiments, the features described in the embodiments in this specification may be replaced or combined with each other, so that professionals in the field can implement or use the present application. Various modifications to these embodiments will be apparent to professionals in the field, 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 low beam lighting module, characterized in that: It includes a light source, a reflection bowl and an optical lens which are sequentially arranged along the transmission direction of the light path; The reflective bowl partially surrounds the light source, and the reflective surface of the reflective bowl includes at least two sub-reflective surfaces connected in sequence along the direction surrounding the light source, and a step is formed at the connection between two adjacent sub-reflective surfaces; the reflective surface of the reflective bowl is configured to reflect and converge the light emitted by the light source to form collimated light to be projected onto the optical lens; The focus of the optical lens is located on the edge of the reflective surface of the reflective bowl close to the light source. The optical lens is configured to project the collimated light into a low beam light shape, and the edge of the reflective surface of the reflective bowl close to the light source is projected as a cutoff line of the low beam light shape.

2. The low beam lighting module according to claim 1, characterized in that: Two adjacent sub-reflecting surfaces form a vertical step or an inclined step at the connection between them.

3. The low beam lighting module according to claim 1, characterized in that: The edges of the sub-reflective surfaces of the reflective bowl close to the light source are located in the same plane.

4. The low beam lighting module according to claim 1, characterized in that: The reflective surface of the reflective bowl includes two sub-reflective surfaces connected in sequence along a direction surrounding the light source, and the focus of the optical lens is located on the edge of the step between the two sub-reflective surfaces close to the light source.

5. The low beam lighting module according to claim 1, characterized in that: The reflective surface of the reflective bowl includes a first sub-reflective surface, a second sub-reflective surface and a third sub-reflective surface connected in sequence along a direction surrounding the light source, and the first sub-reflective surface and the third sub-reflective surface are located on a side of the second sub-reflective surface close to the light source.

6. The low beam lighting module according to claim 5, characterized in that: A step height between the first sub-reflection surface and the second sub-reflection surface is different from a step height between the second sub-reflection surface and the third sub-reflection surface.

7. The low beam lighting module according to claim 6, characterized in that: The area of ​​the first sub-reflection surface is larger than that of the second sub-reflection surface, and the area of ​​the third sub-reflection surface is larger than that of the second sub-reflection surface.

8. The low beam lighting module according to any one of claims 1 to 7, characterized in that: The sub-reflecting surface is a parabola-like surface.

9. The low beam lighting module according to any one of claims 1 to 7, characterized in that: The optical lens has a non-rotationally symmetrical structure.

10. A vehicle lamp, characterized in that: It comprises the low beam lighting module as described in any one of claims 1 to 9.

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