Circuit board, vehicle lamp module, and vehicle lamp

Abstract

A circuit board (3), a vehicle lamp module, and a vehicle lamp. A light passing position (301) is provided on the circuit board (3), and / or one side of the circuit board (3) is formed as a light passing position (301). A cut-off line structure (302) is formed on the edge of the circuit board (3) connected to the light passing position (301). The circuit board (3), the vehicle lamp module, and the vehicle lamp achieve a simple structure and a good light emitting effect.

Description

Circuit board, vehicle light module and vehicle light

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of Chinese patent application No. 202410151773.3 filed on February 2, 2024, the contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to a vehicle lamp, and more particularly, to a circuit board. In addition, the present application also relates to a vehicle lamp module and a vehicle lamp. Background Art

[0004] Current vehicle lighting systems are generally divided into high-beam and low-beam systems. Existing low-beam lighting systems all have a low-beam cutoff line, which ensures the safety of the driver while preventing glare to other road users. Therefore, the low-beam cutoff line plays an important role in preventing glare to other road users.

[0005] Existing projection-type headlight systems generally form a cutoff line using a shading structure positioned at or near the lens focal point. For example, in patent 201510059641.9, a near-light cutoff line is formed by providing a hood or shading structure. However, this results in a more complex component structure and an increased number of parts. Other methods utilize the boundaries of a reflective surface to form a near-light cutoff line. For example, in patent 201811196900.2, a reflector has a reflective boundary corresponding to the cutoff line shape required by the headlight system's illumination pattern. However, this reflector is prone to a small amount of light leakage beyond the reflective boundary, which not only reduces light efficiency but also easily generates stray light.

[0006] Based on the above reasons, it is difficult in the prior art to effectively ensure that a headlight with a low-brightness cut-off line has a simpler structure and higher light efficiency. Summary of the Invention

[0007] The problem to be solved in the first aspect of the present application is to provide a circuit board, on which the edge connected to the light-transmitting part is provided with a light-dark cutoff line structure, which can replace the shading parts or structures used to form the light-dark cutoff line, and simplify the structure of the car light without affecting the light output effect.

[0008] The problem to be solved in the second aspect of the present application is to provide a vehicle light module, which is provided with a light-and-dark cutoff line structure at the edge connected to the light-through part of the circuit board to replace the shading parts or structures that form the light-and-dark cutoff line, and the collimating optical element is combined with the focusing element and the light-and-dark cutoff line structure to form a high beam lighting light pattern, an auxiliary low beam lighting light pattern and a main low beam lighting light pattern, with a simple structure and good light output effect.

[0009] In addition, the problem to be solved in the third aspect of this application is to provide a car lamp with a simple structure and good light output effect.

[0010] In order to solve the above technical problems, the first aspect of the present application provides a circuit board, which is provided with a light-transmitting area, and / or one side of the circuit board is formed as the light-transmitting area, and the edge of the circuit board connected to the light-transmitting area is formed with a light-dark cutoff line structure.

[0011] Preferably, the light-dark cutoff line structure includes a main near light-dark cutoff line structure and / or an auxiliary near light-dark cutoff line structure, the main near light-dark cutoff line structure is formed as a plurality of line segments and / or arcs continuously connected, and the auxiliary near light-dark cutoff line structure is formed as a line segment or an arc.

[0012] Preferably, the substrate of the circuit board is at least one of an aluminum plate, a copper plate, a ceramic substrate or a glass fiber reinforced plastic substrate.

[0013] Preferably, the surface of the substrate of the circuit board is provided with a black or white coating.

[0014] Preferably, the main near-bright light-dark cut-off line structure has at least one inflection point, and the inflection point is a sharp corner or a rounded corner, and the rounded corner is preferably R0.5mm to R2mm.

[0015] Preferably, a light shielding structure is further provided on the circuit board, and the light shielding structure forms a part of the light-dark cut-off line structure.

[0016] The second aspect of the present application also provides a vehicle light module, comprising a circuit board, a light source, and a focusing element and an optical collimating element arranged in sequence along the light transmission direction according to any one of the technical solutions of the first aspect, wherein the light source is arranged on the circuit board.

[0017] Preferably, the focusing element is a reflector, and the reflector is arranged corresponding to the light source.

[0018] Preferably, the reflector includes at least one of a main low-beam reflector, an auxiliary low-beam reflector, and a high-beam reflector.

[0019] Preferably, the reflective surface of the main low-beam reflector is a parabolic reflective surface, a quasi-parabolic reflective surface, an ellipsoidal reflective surface or a quasi-ellipsoidal reflective surface, and the reflective surface of the auxiliary reflector is a parabolic reflective surface, a quasi-parabolic reflective surface, an ellipsoidal reflective surface or a quasi-ellipsoidal reflective surface.

[0020] Preferably, the reflective surface of the reflector includes a first reflective surface and a second reflective surface, the light emitting direction of the first reflective surface is nearly parallel to the light emitting surface of the light source, and the light emitting direction is toward the optical collimating element.

[0021] Preferably, the optical collimating element is one of a lens, a reflector, a lens group, or a lens and reflector combination.

[0022] Preferably, the circuit board is formed in a direction opposite to the light emitting direction of the optical element, the light source is at least partially blocked by the circuit board, and the angle between the light source and the optical axis of the optical collimating element is 0-30°.

[0023] Preferably, the minimum distance between the light-dark cut-off line structure and the light source is 0.5-100 mm.

[0024] Preferably, the minimum distance between the light-dark cut-off line structure and the light source is 3-60 mm.

[0025] Preferably, the light source includes a light-emitting body and a driving device thereof, the circuit board includes a first circuit board and a second circuit board, the light-emitting body is arranged on the first circuit board, the driving device is arranged on the second circuit board, and the edge of the second circuit board connected to the light-transmitting part is formed with the light-cutoff line structure.

[0026] Preferably, the light source includes at least one of a main low-beam light source, an auxiliary low-beam light source, and a high-beam light source. Corresponding to the light source, the focusing element includes at least one of a main low-beam focusing element, an auxiliary low-beam focusing element, and a high-beam focusing element. The main low-beam light source, the main low-beam focusing element, and the corresponding optical collimating element form a main low-beam illumination light pattern, wherein the focus of the corresponding optical collimating element is set at the inflection point of the main low-beam light-dark cut-off line structure, or within a 5 mm diameter range around the inflection point.

[0027] The auxiliary low-beam light source, the auxiliary low-beam focusing element and the corresponding optical collimating element form an auxiliary low-beam lighting light pattern, wherein the focus or focal line of the corresponding optical collimating element is set at the auxiliary low-beam light-dark cut-off line structure or within a 5 mm diameter range around the auxiliary low-beam light-dark cut-off line structure.

[0028] Preferably, the high beam light source, the high beam focusing element and the corresponding optical collimating element form a high beam lighting light pattern, the high beam focusing element is a high beam reflector, and the focus of the corresponding optical collimating element is set on the reflecting surface of the high beam reflector or within a 5 mm diameter range around the reflecting surface.

[0029] Preferably, when the optical collimating element used to form the auxiliary low beam lighting pattern is an optical element having only a unidirectional collimating function for light, the optical collimating element only forms a focal line, which is arranged at the auxiliary low beam light / dark cut-off line structure or within a 5 mm diameter range around it.

[0030] In addition, the third aspect of the present application also provides a vehicle lamp, comprising a vehicle lamp module according to any one of the technical solutions of the second aspect.

[0031] The vehicle light module of this application has the following advantages:

[0032] First, the circuit board of the present application can adopt a trimming process to directly form a light-dark cutoff line structure, so that the headlight module of the present application does not need to add any additional shading parts or structures for forming the light-dark cutoff line.

[0033] Second, the packaging structure of the light source of the present application, the shading plate, and other electronic components or non-electronic components on the circuit board (such as the focusing element set on the circuit board) can also be set to form a part of the light-dark cutoff line structure to participate in blocking light and form a part of the light-dark cutoff line.

[0034] Third, the circuit board is oriented in a direction opposite to the light output of the optical collimating element, so that the light source is at least partially obscured by the circuit board and the angle with the optical axis of the optical collimating element is 0-30°. Specifically, the circuit board can be tilted downward from front to back, so that both direct and reflected light from the light source enter from above the focal point of the optical collimating element. As a result, the direct light from the light source is located within the low-beam illumination pattern and does not form unnecessary bright spots above the cutoff line. In other words, the direct light from the light source does not become stray light. This eliminates the need for a structure that blocks the direct light from the light source.

[0035] Fourth, without setting up a shielding structure, the direct light emitted by the light source can be projected onto the optical collimating element after passing through the focusing element. The light within the entire solid angle range of the light source can be utilized, the light utilization rate is higher, and the light extraction efficiency is improved.

[0036] Fifth, the substrate of the circuit board of the present application is provided with a coating. This coating can be applied with black ink to absorb light, or it can be coated with white ink and / or partially aluminum-plated to form a reflective coating. This coating reflects a portion of the light that strikes the circuit board toward the optical collimating element and onto the road surface, thereby improving light efficiency. Because this portion of reflected light enters from above the focal point of the optical collimating element, it is located within the low-beam lighting pattern and similarly does not form unnecessary bright spots above the cutoff line. In other words, the reflected light does not become stray light, resulting in a better light output effect.

[0037] Other advantages of the present application and the technical effects of the preferred embodiments will be further described in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] FIG1 is a schematic structural diagram of a specific embodiment of a vehicle lamp module of the present application;

[0039] FIG2 is a second structural diagram of a specific embodiment of the vehicle light module of the present application;

[0040] FIG3 is an exploded view of FIG1 ;

[0041] FIG4 is a top view of FIG1;

[0042] FIG5 is a schematic structural diagram of a specific embodiment of a focusing element and a circuit board;

[0043] FIG6 is a cross-sectional view of FIG1;

[0044] FIG7 is a partial enlarged schematic diagram of FIG6;

[0045] FIG8 is a schematic structural diagram of a circuit board according to a specific embodiment of the present application when viewed from the front;

[0046] FIG9 is a schematic structural diagram of a specific embodiment of a circuit board and a light source of the present application;

[0047] FIG10 is a schematic structural diagram of the circuit board of FIG8 as viewed from above;

[0048] FIG11 is a third structural schematic diagram of a specific embodiment of the vehicle lamp module of the present application, showing the positions of the focal points P1, P2, P3 and the focal line PL of the optical collimating element;

[0049] FIG12 is a second cross-sectional view of FIG1 , showing that in low-beam lighting mode, the focus of the optical collimating element is set within a 5 mm diameter range at or near the edge of the circuit board;

[0050] FIG13 is a third cross-sectional view of FIG1 , showing that in high-beam lighting mode, the focus of the optical collimating element is set on or near the reflective surface within a 5 mm diameter range;

[0051] FIG14 is a fourth cross-sectional view of FIG1 , showing that the reflective surface of the reflector is formed as an ellipsoidal reflective surface, a light source is provided at the first focus thereof, and a second focus is in the light output path of the reflector;

[0052] Figure 15 is a schematic diagram of the main low beam lighting pattern;

[0053] FIG16 is a schematic diagram of an auxiliary low-beam lighting pattern, wherein the focus of the optical collimating element is set to the right of the cut-off line structure;

[0054] FIG17 is a schematic diagram of the auxiliary low-beam lighting pattern, in which the focal line of the optical collimator and the cut-off line have the same structural shape;

[0055] FIG18 is a schematic diagram of the superposition of the light patterns of FIG15, FIG16 and FIG17;

[0056] FIG19 is a schematic diagram of a high beam lighting pattern;

[0057] FIG20 is a schematic diagram of the superposition of the high beam lighting pattern and the low beam lighting pattern;

[0058] FIG21 is a schematic structural diagram of a specific embodiment of a circuit board and a light shielding structure of the present application;

[0059] FIG22 is a schematic structural diagram of another specific embodiment of the circuit board of the present application;

[0060] FIG23 is a schematic structural diagram of a specific embodiment of the present application in which the light emitting body and the driving device of the light source are arranged on different circuit boards;

[0061] FIG24 is a schematic diagram of the light pattern corresponding to the second reflective surface of the present application;

[0062] FIG25 is a schematic diagram of the light pattern corresponding to the first reflective surface of the present application;

[0063] FIG26 is a schematic diagram of the light pattern corresponding to the direct light of the light source of the present application;

[0064] FIG27 is a schematic structural diagram of a first specific embodiment of the cut-off line structure of the present application;

[0065] Figure 28 is a normal schematic diagram of Figure 27;

[0066] FIG29 is a schematic structural diagram of a second specific embodiment of the cut-off line structure of the present application;

[0067] Figure 30 is a normal schematic diagram of Figure 29;

[0068] FIG31 is a schematic structural diagram of a third specific embodiment of the cut-off line structure of the present application;

[0069] Figure 32 is a normal schematic diagram of Figure 31;

[0070] Figure 33 is a schematic structural diagram of the circuit board of the present application.

[0071] LIST OF REFERENCE NUMERALS 1 Concentrating element 101 Reflecting mirror 1011 Main reflecting mirror 1012 Auxiliary reflecting mirror 1013 Reflecting surface 1013a First reflecting surface 1013b Second reflecting surface 1014 High-beam reflector 2 Light source 201 High-beam light source 202 Main low-beam light source 203 Auxiliary low-beam light source 3 Circuit board 301 Light-transmitting structure 302 Cut-off line structure 3021 Main low-beam cut-off line structure 3021a First inflection point 3021b Second inflection point 3022 Auxiliary low-beam cut-off line structure 31 First circuit board 32 Second circuit board 4 Optical collimating element 5 Radiator 6 Fixing member 7 First focus 8 Second focus 9 Light-shielding structure DETAILED DESCRIPTION

[0072] The specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation methods described here are only used to illustrate and explain the present application, and the scope of protection of the present application is not limited to the specific implementation methods described below.

[0073] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "installed" and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0074] In the description of this application, it is necessary to explain that some directional words involved in the following description to clearly illustrate the technical solution of this application, such as "up", "down", "left", "right", etc., are based on the normal use orientation of the headlight module. "Front" refers to the direction of light emission, "rear" refers to the direction opposite to "front", and "up" and "down" refer to the vertical orientation of the headlight module after it is assembled on the vehicle. The terms are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on this application.

[0075] As shown in Figures 8 to 10 and Figure 22, the first aspect of the present application provides a circuit board 3, which is provided with a light-transmitting area 301, and / or one side of the circuit board 3 is formed as the light-transmitting area 301, and the edge of the circuit board 3 connected to the light-transmitting area is formed with a light-dark cutoff line structure 302.

[0076] Specifically, circuit board 3 is formed with a through hole, such as a rectangular through hole as shown in FIG22 , which can be considered as a light-transmitting portion 301. Furthermore, one side of circuit board 3, such as the blank area in front as shown in the figure, can be considered as a light-transmitting portion. According to the discussion of the above technical solution, the edge of circuit board 3 that connects to the light-transmitting portion (such as the front edge of circuit board 3) can be formed into a light-cutoff line structure 302. It is clear that light-cutoff line structure 302 must be provided on circuit board 3.

[0077] As a preferred embodiment of the present application, the cutoff line structure 302 includes a main low-beam cutoff line structure 3021 and / or an auxiliary low-beam cutoff line structure 3022. The main low-beam cutoff line structure 3021 is formed as a plurality of continuously connected line segments and / or arcs, while the auxiliary low-beam cutoff line structure 3022 is formed as a line segment or arc. Different cutoff line structures 302 correspond to different focusing elements 1 in the headlight module to produce different lighting patterns.

[0078] As a preferred embodiment of the present application, the substrate of the circuit board 3 is at least one of an aluminum substrate, a copper substrate, a ceramic substrate or a glass fiber reinforced plastic (FR4) substrate.

[0079] More preferably, the substrate surface of the circuit board 3 is provided with a black or white coating. For example, the substrate surface of the circuit board 3 on which the light source 2 is mounted can be provided with a black or white coating. The black coating can absorb most of the light irradiated on the circuit board 3, while the white coating can be formed into a reflective layer. Furthermore, the black coating is preferably black ink to absorb light, and the white coating is preferably white ink and / or a partial aluminum-plated layer to form a reflective layer, thereby improving optical efficiency. In addition, the circuit board 3 can also adopt a copper-exposed process without providing a coating, which can also play a role in reflecting light. In addition, since the reflected light is incident from above the focus of the optical collimating element, this part of the light is located in the low-beam lighting light type and will not form unnecessary bright spots above the light-dark cutoff line, that is, the reflected light will not become stray light.

[0080] As another preferred embodiment of the present application, the main low-light dark-cutoff line structure 3021 has at least one inflection point.

[0081] As shown in FIG. 27 and FIG. 28 , as a first preferred embodiment of the main near-bright light dark cut-off line structure 3021 of the present application, the main near-bright light dark cut-off line structure 3021 has four inflection points.

[0082] As shown in FIG. 29 and FIG. 30 , as a second preferred embodiment of the main near-bright light dark cut-off line structure 3021 of the present application, the main near-bright light dark cut-off line structure 3021 has an inflection point.

[0083] As shown in FIG. 31 and FIG. 32 , as the third preferred embodiment of the main near-bright light dark cut-off line structure 3021 of the present application, the main near-bright light dark cut-off line structure 3021 also has two inflection points.

[0084] In the three preferred embodiments described above, the different shapes of the main low-beam cutoff line structures 3021 correspond to different shapes of the cutoff lines. For example, the main low-beam cutoff line structures 3021 with four inflection points shown in Figures 27 and 28 form a "bathtub"-shaped cutoff line. Furthermore, the inflection points are either sharp corners or rounded corners, with the corner radius preferably ranging from R0.5mm to R2mm.

[0085] As a specific embodiment of the present application, as shown in Figure 21, a shading structure 9 can be further provided on the circuit board, and the shading structure 9 is utilized to participate in the shielding to form a part of the light-dark cut-off line structure 302. For example, the shading structure 9 can be at least one of the packaging structure of the light source, a shading plate, an electronic component or a non-electronic component.

[0086] As shown in Figures 1 to 7, the second aspect of the present application provides a vehicle lamp module, comprising a circuit board 3 according to any one of the technical solutions of the first aspect, a light source, and a focusing element 1 and an optical collimating element 4 arranged in sequence along the light path transmission direction, the light source 2 is arranged on the circuit board, the circuit board 3 is fixed on the heat sink 5, the focusing element 1 and the optical collimating element 4 are connected by a fixing member 6, and the fixing member 6 is preferably a spring clip. The light source 2 is preferably an LED light-emitting chip, a laser light source, etc. The light emitted by the light source is converged by the focusing element 1 and then emitted through the optical collimating element 4 to form an illumination light pattern. Furthermore, the focusing element 1 can be one or more of a reflector, a concentrator, a lens, or other types of light guides, which are not limited here.

[0087] Specifically, the focusing element 1 is a reflector 101, which is disposed corresponding to the light source 2. The reflector 101 can focus the light emitted by the light source 2 and reflect it toward the optical collimating element 4, and the light is emitted from the optical collimating element 4 to form an illumination light pattern.

[0088] Furthermore, as shown in FIG11 , the reflector 101 includes at least one of a main low-beam reflector 1011 , an auxiliary low-beam reflector 1012 , and a high-beam reflector 1014 , wherein:

[0089] The reflecting surface of the main low-beam reflector 1011 is a parabolic reflecting surface, a quasi-parabolic reflecting surface, an ellipsoidal reflecting surface or a quasi-ellipsoidal reflecting surface, and the reflecting surface of the auxiliary low-beam reflector 1012 is a parabolic reflecting surface, a quasi-parabolic reflecting surface, an ellipsoidal reflecting surface or a quasi-ellipsoidal reflecting surface. When the reflecting surfaces of the main low-beam reflector 1011 and the auxiliary low-beam reflector 1012 are parabolic reflecting surfaces or quasi-parabolic reflecting surfaces, the light source 2 is arranged at the focus of the main low-beam reflector 1011 and the auxiliary low-beam reflector 1012 or at the focal point thereof. Nearby, for example, within a diameter range of 5 mm around the focus, when the reflecting surfaces of the main low-beam reflector 1011 and the auxiliary low-beam reflector 1012 are ellipsoidal reflecting surfaces or ellipsoidal-like reflecting surfaces, as shown in Figure 14, the light source 2 is arranged at the first focus 7 of the main low-beam reflector 1011 and the auxiliary low-beam reflector 1012 or near the first focus 7, for example, within a diameter range of 5 mm around the first focus 7, the second focus 8 is arranged in its light output path, that is, the second focus 8 is arranged in the light path of the light emitted by the light source 2 and then reflected by the reflector 101 and transmitted to the optical collimation element 4.

[0090] As a specific embodiment of the present application, the reflector 101 of the present application includes at least a main low beam reflector 1011, and the main low beam reflector 1011 and the auxiliary low beam reflector 1012 can also be set at the same time. The main low beam reflector 1011 and the auxiliary low beam reflector 1012 are used to converge the light emitted by the light source 2 and reflect it toward the optical collimation element 4.

[0091] As a specific embodiment of the reflector 101 of the present application, as shown in Figure 22, the reflector 101 includes a main low beam reflector 1011 and an auxiliary low beam reflector 1012. The reflecting surface of the main low beam reflector 1011 is a parabolic reflecting surface or a quasi-parabolic reflecting surface, and the reflecting surface of the auxiliary low beam reflector 1012 is an ellipsoidal reflecting surface or a quasi-ellipsoidal reflecting surface. The main low beam reflector 1011 is only formed with a first focus 7, and the light source 2 is arranged at the first focus 7 of the main low beam reflector 1011. The auxiliary low beam reflector 1012 is formed with a first focus 7 and a second focus 8. The light source 2 is arranged at the first focus 7 of the auxiliary low beam reflector 1012, and the light emitting direction of the reflector 101 is toward the optical collimating element 4.

[0092] Specifically, the main low-beam light source 202 is disposed at or near the focus of the main low-beam reflector 1011 , and the auxiliary low-beam light source 203 is disposed at or near the focus of the auxiliary low-beam reflector.

[0093] As another specific embodiment of the reflector 101 of the present application, as shown in Figures 11 and 14, the reflector 101 includes a main low beam reflector 1011 and an auxiliary low beam reflector 1012. The reflecting surfaces of the main low beam reflector 1011 and the auxiliary low beam reflector 1012 are ellipsoidal reflecting surfaces or ellipsoidal-like reflecting surfaces. The main low beam reflector 1011 and the auxiliary low beam reflector 1012 have a first focus 7 and a second focus 8. The main low beam light source 202 and the auxiliary low beam light source 203 are both arranged at the first focus 7 of their respective corresponding reflectors 101, and the second focus 8 of their respective corresponding reflectors 101 are arranged in their light output paths.

[0094] As a preferred embodiment of the reflector 101 of the present application, as shown in Figures 6 and 7, the reflective surface 1013 of the reflector 101 includes a first reflective surface 1013a and a second reflective surface 1013b. The light-emitting direction of the first reflective surface 1013a is nearly parallel to the light-emitting surface of the light source 2, and the light-emitting direction is toward the optical collimating element 4. The first reflective surface 1013a can reflect the light emitted by the light source 2 in a direction parallel to the circuit board 3, thereby avoiding most of the light being blocked by the circuit board 3 or the light source 2 and unable to be transmitted to the optical collimating element 4, thereby reducing the light efficiency.

[0095] It should be noted here that nearly parallel can be understood as parallel, or the angle between the parallel and the light-emitting surface of the light source 2 is less than 5°.

[0096] As a specific embodiment of the present application, the optical collimating element 4 is a lens, a reflector, a lens group, a reflector group or a lens and reflector combination, which can converge the parallel light incident on the optical collimating element 4 from the outside to the focus of the optical collimating element 4 or the area near the focus.

[0097] As a specific embodiment of the present application, as shown in FIG33 , the circuit board 3 is formed in a direction opposite to the light emission direction of the optical collimating element 4, so that the light source 2 is at least partially blocked by the circuit board 3 and the angle f between the circuit board 3 and the optical axis of the optical collimating element 4 is 0-30°. That is, the circuit board 3 can be formed to tilt downward from front to back, with the normal of the light emitting surface of the light source 2 tilted backward. This allows more light emitted by the light source 2 to be received and reflected by the reflector 101, resulting in higher light efficiency. It should be noted that the light emission direction of the vehicle light module is "front". Of course, in another specific embodiment of the present application, as shown in the structure depicted by the dotted line in FIG33 , the circuit board 3 can also be formed to tilt downward from back to front, with the normal of the light emitting surface of the light source 2 tilted forward. In this case, the circuit board 3 also forms a certain angle with the optical axis of the optical collimating element 4. In the specific implementation process, the circuit board 3 is arranged within the range of the angle f tilted downward from front to back and the angle tilted downward from back to front. The corresponding arrangement can be made according to the needs.

[0098] Furthermore, because the circuit board 3 is tilted downward from front to back, the light directly emitted by the light source 2 and the light reflected by the reflective surface 1013 are both incident from above the focal point of the optical collimating element 4. Therefore, the light directly emitted by the light source 2 is located in the low-beam lighting pattern and will not form unnecessary bright spots above the cutoff line. In other words, the light directly emitted by the light source 2 will not become stray light. Therefore, the light within the entire solid angle range of the light source 2 can be utilized, the light utilization rate is higher, and there is no need to set up an additional shielding structure to block the direct light from the light source 2 to prevent the formation of stray light. As shown in Figures 24-26, Figure 24 shows a schematic diagram of the light pattern corresponding to the second reflective surface 1013b, Figure 25 shows a schematic diagram of the light pattern corresponding to the first reflective surface 1013a, and Figure 26 shows a schematic diagram of the light pattern corresponding to the light directly emitted by the light source 2. It can be clearly seen that the light pattern formed by the light directly emitted by the light source 2 is located below the HH axis on the light distribution screen, that is, it will not form unnecessary bright spots above the cutoff line, and the light output effect is better.

[0099] As a specific embodiment of the present application, when the circuit board 3 is formed to be tilted downward from front to back, when observing the circuit board 3 from the light emitting direction opposite to the optical collimating element 4, as shown in Figure 8, there is a visual difference d between the inflection points of the bright and dark cut-off line structure, and when observing the circuit board 3 from a top view angle, as shown in Figure 10, the distance between the inflection points of the bright and dark cut-off line structure is d', and d and d' satisfy the relationship d = d' × Sin (f), where f is the angle between the optical axis of the circuit board 3 and the optical collimating element 4.

[0100] As a specific embodiment of the present application, at least a portion of the circuit board 3 is disposed in the light-emitting path of the focusing element 1, so that the circuit board 3 partially blocks light in the light-emitting path of the focusing element 1, thereby forming a primary light pattern with a bright / dark cutoff line. The primary light pattern is then subjected to a secondary imaging process by the optical collimating element 4 and projected to obtain an illumination light pattern. Most of the light in the light-emitting path of the focusing element 1 passes through the light-passing portion 301 and is transmitted to the optical collimating element 4. The remaining light blocked by the circuit board 3 is absorbed by the circuit board 3 or reflected to the optical collimating element 4, ultimately forming an illumination light pattern with a bright / dark cutoff line.

[0101] As a specific embodiment of the present application, the minimum distance between the light-dark cutoff line structure 302 and the light source 2 is 0.5-100 mm. Preferably, the minimum distance between the light-dark cutoff line structure 302 and the light source 2 is 3-60 mm. This arrangement ensures that light can pass through the light-transmitting portion 301 and be transmitted to the optical collimating element 4, and can form a light-dark cutoff line by blocking the light through the edge of the circuit board 3.

[0102] As another specific embodiment of the present application, the light source 2 includes a light-emitting body and a driving device thereof. The light-emitting body and the driving device thereof can be arranged on the same circuit board 3 or separately on different circuit boards 3. As shown in Figure 23, the light-emitting body of the light source 2 is arranged on the first circuit board 31, and the driving device of the light source 2 is arranged on the second circuit board 32. A light-dark cutoff line structure 302 is arranged on the edge of the second circuit board 32 near the light-passing part. The second circuit board 32 is tilted downward from front to back, and the angle between the second circuit board 32 and the optical axis of the optical collimating element 4 is -45° to 45°, preferably 0 to 30°, so that the light efficiency is higher.

[0103] As a specific embodiment of the present application, a headlight module includes at least one of a main low-beam lighting module, an auxiliary low-beam lighting module, and a high-beam lighting module. As shown in Figures 11 and 13 , the high-beam lighting module, which forms the high-beam lighting pattern, includes a high-beam light source 201, a high-beam focusing element, and an optical collimator 4. The high-beam focusing element can be a high-beam reflector 1014. The focal point P1 of the corresponding optical collimator 4 is positioned on or near the reflective surface of the high-beam reflector 1014, preferably within a 5 mm diameter range around the reflective surface to achieve maximum illumination brightness. Figure 11 illustrates the focal point arrangement of the optical collimator 4 of the present application: in the high-beam lighting module, focal point P1 is positioned on the reflective surface; in both the main low-beam and auxiliary low-beam lighting modules, focal point P2 is positioned at the cutoff line structure 302. If the optical collimator 4 of the present application is only unidirectionally collimated, then it only forms a focal line. In this case, it can be used to form the auxiliary low-beam lighting pattern, and its focal line is also positioned at the cutoff line structure 302.

[0104] As a preferred embodiment of the present application, as shown in Figures 11 and 12, a main low-beam lighting module that forms a main low-beam lighting pattern includes a main low-beam light source 202, a main low-beam focusing element, and an optical collimating element 4. The focal point P2 of the corresponding optical collimating element 4 is set at the inflection point of the main low-beam light cut-off line structure 3021. Specifically, when the main low-beam light cut-off line structure 3021 has a first inflection point 3021a and a second inflection point 3021b, the focal point of the optical collimating element 4 is set at or near the first inflection point 3021a or the second inflection point 3021b, preferably within a 5 mm diameter range around the inflection point. As shown in Figures 11 and 12, the auxiliary low-beam lighting module that forms the auxiliary low-beam lighting pattern includes an auxiliary low-beam light source 203, an auxiliary low-beam focusing element, and an optical collimator 4. The focus P3 or focal line PL of the corresponding optical collimator 4 is set at or near the auxiliary low-beam cut-off line structure 3022, preferably within a 5 mm diameter range around the auxiliary low-beam cut-off line structure 3022. In the auxiliary low-beam lighting module, when the optical collimator 4 is an optical element that only has a unidirectional collimation function for light, it can only form the focal line PL. For example, if the optical collimator 4 has a vertical collimation function for light, it forms a horizontal focal line PL. The focal line PL can be located at or near the auxiliary low-beam cut-off line structure 3022. The shape of the auxiliary low-beam cut-off line structure 3022 can be set according to the shape of the focal line PL. For example, if the focal line PL is a straight line, the shape of the auxiliary low-beam cut-off line structure 3022 can also be set to a straight line.

[0105] Preferably, in the auxiliary low-beam lighting module, the optical collimating element 4 is a cylindrical lens or a free-form surface lens, the auxiliary low-beam light cut-off line structure 3022 is a straight line or an arc, the cylindrical lens or the free-form surface lens has a focal line PL, and the focal line PL is set at the auxiliary low-beam light cut-off line structure 3022 or within a 5 mm diameter range around it.

[0106] In addition, the third aspect of the present application further provides a vehicle lamp, comprising a vehicle lamp module according to any one of the technical solutions of the second aspect.

[0107] For example, as shown in Figures 11 and 15, the main low beam lighting pattern formed by the headlights of the present application is on the light distribution screen, and the inflection point of the light-dark cutoff line corresponding to the first inflection point 3021a is located on the HH axis, and the inflection point of the light-dark cutoff line corresponding to the second inflection point 3021b is located on the VV axis.

[0108] For example, in the second auxiliary low-beam lighting module on the left side shown in FIG11 , the focal point P3 of the corresponding optical collimator 4 is positioned slightly to the right of the corresponding auxiliary low-beam cutoff line structure 3022. The resulting auxiliary low-beam lighting pattern is shown in FIG16 , which is an auxiliary low-beam lighting pattern positioned slightly to the right on the light distribution screen. In the first auxiliary low-beam lighting module on the right side shown in FIG11 , the focal line PL of the corresponding optical collimator 4 is similar in shape to the auxiliary low-beam cutoff line structure 3022. The resulting auxiliary low-beam lighting pattern is shown in FIG17 , which is an auxiliary low-beam lighting pattern positioned slightly to the left on the light distribution screen. The auxiliary low-beam lighting module can adjust the lighting direction by setting the focal point or focal line of the optical collimator 4 to form different auxiliary low-beam lighting patterns.

[0109] As shown in FIG18 , it shows a schematic diagram of the superimposed light pattern of the main low-beam lighting light pattern and the auxiliary low-beam lighting light pattern in FIG15 to FIG17 .

[0110] In addition, as shown in FIG19 , the vehicle lamp of the present application can also form a high-beam lighting pattern, and as shown in FIG20 , a lighting pattern that is a superposition of the high-beam and low-beam lighting patterns.

[0111] The preferred embodiments of the present application are described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the specific details in the above embodiments. Within the technical concept of the present application, various simple modifications can be made to the technical solution of the present application, and these simple modifications all fall within the scope of protection of the present application.

[0112] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner unless there is any contradiction. In order to avoid unnecessary repetition, this application will not further describe various possible combinations.

[0113] In addition, the various implementation methods of the present application may be arbitrarily combined, and as long as they do not violate the concept of the present application, they should also be regarded as the contents disclosed in the present application.

Claims

1. A circuit board, characterized in that: A light-transmitting portion (301) is provided on the circuit board, and / or one side of the circuit board is formed as the light-transmitting portion (301), and a light-dark cutoff line structure (302) is formed on the edge of the circuit board connected to the light-transmitting portion.

2. The circuit board according to claim 1, wherein: The light / dark cutoff line structure (302) comprises a main near light / dark cutoff line structure (3021) and / or an auxiliary near light / dark cutoff line structure (3022); the main near light / dark cutoff line structure (3021) is formed as a plurality of line segments and / or arcs connected continuously; and the auxiliary near light / dark cutoff line structure (3022) is formed as a line segment or an arc.

3. The circuit board according to claim 1, wherein: The substrate of the circuit board is at least one of an aluminum plate, a copper plate, a ceramic substrate or a glass fiber reinforced plastic substrate.

4. The circuit board according to claim 1, wherein: The surface of the substrate of the circuit board is provided with a black or white coating.

5. The circuit board according to claim 2, wherein: The main near-bright light-dark cut-off line structure (3021) has at least one inflection point, which is a sharp corner or a rounded corner, and the rounded corner is preferably R0.5mm to R2mm.

6. The circuit board according to claim 1, wherein: A light shielding structure (9) is also provided on the circuit board (3), and the light shielding structure (9) forms a part of the light-dark cutoff line structure (302).

7. A vehicle light module, characterized in that: The optical optical system comprises a circuit board (3) according to any one of claims 1 to 6, a light source (2), and a focusing element (1) and an optical collimating element (4) arranged in sequence along the light transmission direction, wherein the light source (2) is arranged on the circuit board (3).

8. The vehicle light module according to claim 7, characterized in that: The light-collecting element (1) is a reflector (101), and the reflector (101) is arranged corresponding to the light source (2).

9. The vehicle light module according to claim 8, characterized in that: The reflector (101) includes at least one of a main low-beam reflector (1011), an auxiliary low-beam reflector (1012), and a high-beam reflector (1014).

10. The vehicle light module according to claim 9, characterized in that: The reflecting surface of the main low-beam reflector (1011) is one of a parabolic reflecting surface, a quasi-parabolic reflecting surface, an ellipsoidal reflecting surface or a quasi-ellipsoidal reflecting surface, and the reflecting surface of the auxiliary reflector (1012) is one of a parabolic reflecting surface, a quasi-parabolic reflecting surface, an ellipsoidal reflecting surface or a quasi-ellipsoidal reflecting surface.

11. The vehicle lamp module according to claim 10, characterized in that: The reflecting surface (1013) of the reflecting mirror (101) comprises a first reflecting surface (1013a) and a second reflecting surface (1013b); the light emitting direction of the first reflecting surface (1013a) is nearly parallel to the light emitting surface of the light source, and the light emitting direction is toward the optical collimating element.

12. The vehicle lamp module according to claim 9, characterized in that: The optical collimating element (4) is one of a lens, a reflector, a lens group, or a lens and reflector assembly.

13. The vehicle lamp module according to any one of claims 7 to 12, characterized in that: The circuit board (3) is formed in a direction opposite to the light emitting direction of the optical collimating element (4), the light source (2) is at least partially blocked by the circuit board (3), and the angle between the light source and the optical axis of the optical collimating element (4) is 0-30°.

14. The vehicle lamp module according to any one of claims 7 to 12, characterized in that: The minimum distance between the light / dark cutoff line structure (302) and the light source (2) is 0.5-100 mm.

15. The vehicle lamp module according to claim 14, characterized in that: The minimum distance between the light-dark cutoff line structure (302) and the light source (2) is 3-60 mm.

16. The vehicle lamp module according to any one of claims 7 to 12, characterized in that: The light source (2) comprises a light emitting body and a driving device thereof, the circuit board (3) comprises a first circuit board (31) and a second circuit board (32), the light emitting body is arranged on the first circuit board (31), the driving device is arranged on the second circuit board (32), and a light-dark cutoff line structure (302) is formed on the edge of the second circuit board (32) that is connected to the light-transmitting portion (301).

17. The vehicle lamp module according to any one of claims 7 to 12, characterized in that: The light source (2) includes at least one of a main low-beam light source (202), an auxiliary low-beam light source (203) and a high-beam light source (201); corresponding to the light source (2), the focusing element (1) includes at least one of a main low-beam focusing element, an auxiliary low-beam focusing element and a high-beam focusing element; the main low-beam light source (202), the main low-beam focusing element and the corresponding optical collimating element (4) form a main low-beam lighting light pattern; wherein the focus (P2) of the corresponding optical collimating element (4) is arranged at the inflection point of the main low-beam light-dark cut-off line structure (3021), or within a 5 mm diameter range around the inflection point; The auxiliary low-beam light source (203), the auxiliary low-beam focusing element and the corresponding optical collimating element (4) form an auxiliary low-beam lighting light pattern, wherein the focus (P3) or focal line (PL) of the corresponding optical collimating element (4) is arranged at the auxiliary low-beam light-dark cut-off line structure (3022) or within a 5 mm diameter range around the auxiliary low-beam light-dark cut-off line structure (3022).

18. The vehicle lamp module according to claim 17, characterized in that: The high-beam light source (201), the high-beam focusing element, and the corresponding optical collimating element (4) form a high-beam lighting light pattern; the high-beam focusing element is a high-beam reflector (1014); and the focus (P1) of the corresponding optical collimating element (4) is arranged on a reflection surface of the high-beam reflector (1014) or within a 5 mm diameter range around the reflection surface.

19. The vehicle lamp module according to claim 17, wherein: When the optical collimating element (4) used to form the auxiliary low-beam lighting pattern is an optical element having only a unidirectional collimating function for light, the optical collimating element (4) only forms a focal line (PL), and the focal line (PL) is arranged at the auxiliary low-beam light / dark cut-off line structure (3022) or within a 5 mm diameter range around it.

20. A vehicle lamp, characterized in that: The vehicle light module comprises the vehicle light module according to any one of claims 7 to 19.

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