Low beam headlight module and headlights

Abstract

This application provides a low beam headlight module and a vehicle headlight. The low beam headlight module includes: multiple light sources arranged at intervals along a first direction; the low beam lens includes a widening lens unit and an elbow lens unit, which are integrally formed structures. The widening lens unit and the elbow lens unit share a light-incident surface and a light-exit surface. The light-incident surface is arranged opposite to the multiple light sources along a second direction, and the light-exit surface is located on one side of the light-incident surface along a third direction; the widening lens unit is used to form a low beam widening light pattern, and the elbow lens unit is used to form a low beam elbow cutoff line light pattern. The low beam elbow cutoff line light pattern and the low beam widening light pattern are combined to form a low beam light pattern; the light-exit surface includes multiple sub-light-exit surfaces arranged sequentially along the first direction, and the distance between the root of each sub-light-exit surface and the light source in the third direction gradually increases along the first direction. The embodiments of this application can effectively improve the luminous efficacy of the low beam headlight module.

Description

Technical Field

[0001] This application relates to the field of low beam headlight technology, and in particular to a low beam headlight module and vehicle headlight. Background Technology

[0002] With the development of automotive lighting technology and the diversification of automotive headlight designs, ultra-narrow lens modules with high luminous efficiency are becoming the mainstream development direction.

[0003] Most existing low beam lighting modules typically consist of two or more lens layers, including an inner lens and an outer lens. Light passes through different media such as lenses and air layers, resulting in light loss and reduced luminous efficiency. Furthermore, with the increasing diversity of vehicle designs, in order to match the low beam lighting module with the overall vehicle shape, the light-emitting surface of the outer lens is often made with a conformal design, further reducing luminous efficiency. Utility Model Content

[0004] This application provides a low beam headlight module and vehicle headlight, aiming to improve the problem of low light output efficiency of low beam lighting modules in related technologies.

[0005] In a first aspect, embodiments of this application propose a low beam lamp module, comprising: multiple light sources arranged at intervals along a first direction, the light sources being used to emit light; a low beam lens disposed on the light-emitting side of the light sources, the low beam lens including a widening lens unit and an elbow lens unit, the widening lens unit and the elbow lens unit being an integrally formed structure, the widening lens unit and the elbow lens unit sharing a light-incident surface and a light-emitting surface, the light-incident surface being disposed opposite to the multiple light sources along a second direction, the light-emitting surface being located on one side of the light-incident surface along a third direction; the widening lens unit being used to form a low beam widening light pattern, the elbow lens unit being used to form a low beam elbow cutoff line light pattern, the low beam elbow cutoff line light pattern and the low beam widening light pattern being combined to form a low beam light pattern; the light-emitting surface including multiple sub-light-emitting surfaces arranged sequentially along the first direction, the distance between the root of each sub-light-emitting surface and the light source in the third direction gradually increasing along the first direction, the first direction, the second direction and the third direction being perpendicular to each other.

[0006] The low beam module of this application uses a single, integrally molded low beam lens to achieve the low beam pattern. With this configuration, firstly, after the emitted light from the light source enters the low beam lens, the light path propagation and shaping are completed inside the lens, essentially combining the outer and inner lenses of traditional solutions into one unit. No light passes through the lens / air interface, effectively reducing Fresnel loss and dispersion, and improving luminous efficiency. Secondly, the light-emitting surface includes multiple sub-light-emitting surfaces arranged in a stepped manner along the first direction Y. This allows for a conformal design of the light-emitting surface. Furthermore, compared to related technologies where the light-emitting surface is designed as a single conformal large curved surface, each sub-light-emitting surface can independently form an optical adjustment area. This allows each sub-light-emitting surface to more finely and efficiently calibrate the light in different areas, forming zoned light calibration. This helps to improve the light loss and scattering problems caused by the inability of traditional conformal lenses to adapt the global focal length to all areas, thereby further improving the light output efficiency. Therefore, the embodiment of this application can effectively improve the light output efficiency of the low beam module.

[0007] In some embodiments, the light-emitting surface further includes a plurality of connecting surfaces, and two adjacent sub-light-emitting surfaces are connected through the connecting surfaces, which are perpendicular to the first direction.

[0008] First, it facilitates the fabrication of each sub-emitting surface and reduces costs. Second, each connecting surface also participates in light distribution as a light emission surface, ensuring that the final synthesized near-beam spot is continuous, seamless, and has a natural transition. This also helps to improve the sharpness and uniformity of the near-beam pattern and further enhances luminous efficiency.

[0009] In some embodiments, the lengths of all the connecting surfaces in the third direction are the same. This arrangement, on the one hand, facilitates the fabrication of each sub-light-emitting surface and reduces costs. On the other hand, it enhances the styling diversity and aesthetics of the conformal design of the light-emitting surfaces.

[0010] In some embodiments, the length of each connecting surface in the third direction gradually increases along the first direction. This arrangement helps to further improve the styling diversity and aesthetics of the conformal design of the light-emitting surface.

[0011] In some embodiments, the broadening lens unit and the elbow lens unit also share a first total internal reflection surface; the broadening lens unit includes a second total internal reflection surface and a third total internal reflection surface corresponding to the light source, and the elbow lens unit includes a fourth total internal reflection surface and a fifth total internal reflection surface corresponding to the light source; the second total internal reflection surface and the fourth total internal reflection surface are arranged along the first direction, and the third total internal reflection surface and the fifth total internal reflection surface are arranged along the first direction and are opposite to the first total internal reflection surface along the second direction; the light emitted by the light source is projected onto the second total internal reflection surface through the light incident surface, reflected by the second total internal reflection surface, and then reflected by the third total internal reflection surface and the first total internal reflection surface in sequence, and exited from the light exiting surface to form a near-beam broadening light pattern; the light emitted by the light source is projected onto the fourth total internal reflection surface through the light incident surface, reflected by the fourth total internal reflection surface, and then reflected by the fifth total internal reflection surface and the first total internal reflection surface in sequence, and exited from the light exiting surface to form a near-beam elbow cutoff line light pattern.

[0012] Firstly, it facilitates the narrow aperture design requirement of low beam headlight modules. Secondly, the total internal reflection within the low beam lens achieves optical path folding, which also helps reduce the size and weight of the lens, thus contributing to energy conservation and cost savings. Thirdly, the first total internal reflection surface can be a complete smooth curved surface, which not only improves the static appearance consistency of the low beam lens and meets different styling requirements such as horizontally elongated module shapes, but also reduces the processing difficulty of the low beam lens and improves the processing yield.

[0013] In some embodiments, a beam of parallel light is incident from the light-emitting surface, converges after passing through the light-emitting surface, and is then reflected sequentially by the first total internal reflection surface and the third total internal reflection surface, converges along the second direction, and is parallel to the first direction, converging at the focal line, which is located on the side edge of the second total internal reflection surface near the light-emitting surface; a beam of parallel light is incident from the light-emitting surface, converges after passing through the light-emitting surface, and is then reflected sequentially by the first total internal reflection surface and the fifth total internal reflection surface, focusing at the focal point, which is located on the side edge of the fourth total internal reflection surface near the light-emitting surface.

[0014] In this way, horizontal and vertical focusing can be separated, and the vertical focal length is greater than the horizontal focal length, which makes it easier to achieve a near-beam pattern that is wide horizontally and narrow vertically. It also helps to narrow the opening size of the light-emitting surface along the second direction (i.e., the vertical direction).

[0015] In some embodiments, each sub-emitting surface is a convex cylindrical surface extending along an arc in the second direction, wherein all sub-emitting surfaces have the same radius. This configuration improves the ease of manufacturing each sub-emitting surface and reduces costs.

[0016] In some embodiments, the light-emitting surface has a first side and a second side disposed opposite to each other along the first direction, the second side being located on the side of the first side away from the light source, and the radius of each of the sub-light-emitting surfaces gradually increases from the first side to the second side.

[0017] In this embodiment, the radius of each sub-light-emitting surface is set to gradually increase along the direction from the first side to the second side, which can achieve shape-matching of the focal length of each sub-light-emitting surface and compensate for optical path difference. This is beneficial to further improve the light output efficiency of the low beam module.

[0018] In some embodiments, the radius of the cylinder is greater than or equal to 40 mm. The cylinder is designed with a large radius of curvature, which can avoid excessive refraction of light, improve astigmatism and field curvature, thereby helping to improve the light output effect of the near beam pattern.

[0019] In some embodiments, the plurality of light sources include a plurality of single-core LEDs and a plurality of dual-core LEDs, wherein the plurality of single-core LEDs are disposed on both sides of the plurality of dual-core LEDs along the first direction; there are a plurality of widening lens units and a plurality of elbow lens units, wherein the widening lens units are configured in a one-to-one correspondence with the dual-core LEDs, and the elbow lens units are configured in a one-to-one correspondence with the single-core LEDs.

[0020] On the one hand, the emitted light from each light source can be modulated through a corresponding widening lens unit or elbow lens unit, which improves the ease of designing and manufacturing widening lens units and elbow lens units. On the other hand, the number and arrangement of light sources, widening lens units, and elbow lens units can be flexibly adjusted according to lighting requirements, which also helps to improve the versatility and expandability of the low beam module.

[0021] In some embodiments, the number of single-core LEDs and elbow lens units are four, and the number of dual-core LEDs and widening lens units are two; the second total reflection surfaces of the two widening lens units are symmetrically arranged along the third direction, and the optical axes of the two second total reflection surfaces are close to each other at the ends opposite to the light source and form a preset angle with the third direction.

[0022] This helps to expand the light along the first direction (i.e., the lateral direction) to form a near-beam broadening pattern, and also helps to eliminate dark areas.

[0023] Secondly, embodiments of this application provide a vehicle headlight, including the low beam module described in the first aspect. Attached Figure Description

[0024] Figure 1 This is a side view of the low beam headlight module provided in an embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the low beam module provided in an embodiment of this application from one perspective.

[0026] Figure 3 This is a top view of the low beam headlight module provided in an embodiment of this application;

[0027] Figure 4 This is a bottom view of the low beam headlight module provided in an embodiment of this application;

[0028] Figure 5 A schematic diagram illustrating the propagation of light from the low beam headlight module provided in this embodiment of the application through the low beam lens;

[0029] Figure 6 A simplified schematic diagram of the optical path propagation of the near-beam broadened beam pattern provided in the embodiments of this application;

[0030] Figure 7 A simplified schematic diagram of the optical path propagation of the near-beam elbow-shaped cutoff line optical pattern provided in the embodiments of this application;

[0031] Figure 8 This is a diagram illustrating the lighting effect of the low beam pattern of the low beam module according to an embodiment of this application.

[0032] Figure 9 This is a diagram illustrating the lighting effect of the elbow-shaped cutoff line light pattern of the low beam headlight module according to an embodiment of this application.

[0033] Figure 10 This is a diagram illustrating the lighting effect of the low beam pattern of the low beam module according to an embodiment of this application.

[0034] The annotations in the attached figures are explained as follows:

[0035] 10. Low beam headlight module;

[0036] 100. Light source; 110. Single-core LED; 120. Dual-core LED;

[0037] 200, Low beam lens; 201, Incident surface; 202, Exit surface; 2021, Sub-exit surface; 2022, First side; 2023, Second side; 2024, Connecting surface; 203, First total internal reflection surface;

[0038] 210. Widening lens unit; 211. Second total reflection surface; 212. Third total reflection surface;

[0039] 220. Elbow lens unit; 221. Fourth total reflection surface; 222. Fifth total reflection surface; 2211. Cutoff line structure;

[0040] 260. First surface; 270. Second surface; 261. Light guide tooth structure. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0042] In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0045] As described in the background section, existing low beam illumination modules have the following problems:

[0046] First, light rays pass through different media such as lenses and air layers, resulting in light loss and dispersion, which reduces luminous efficacy. Second, with the diversity of vehicle designs, in order to match the low beam lighting module with the overall vehicle shape, the light-emitting surface of the outer lens is often made with a conformal design, which further reduces the luminous efficacy.

[0047] Based on the above problems, this application proposes a low beam lamp module and a vehicle lamp to improve the problem of low light output efficiency of the low beam lamp module.

[0048] Firstly, embodiments of this application propose a low beam headlight module 10. For example... Figures 1 to 4 As shown, the low beam module 10 includes multiple light sources 100 and a low beam lens 200. The multiple light sources 100 are arranged at intervals along a first direction Y. The light sources 100 are used to emit light. The low beam lens 200 is disposed on the light-emitting side of the light sources 100. The low beam lens 200 includes a widening lens unit 210 and an elbow lens unit 220. The widening lens unit 210 and the elbow lens unit 220 are integrally formed. The widening lens unit 210 and the elbow lens unit 220 share a light-incident surface 201 and a light-emitting surface 200. The light-incident surface 201 is positioned opposite to multiple light sources 100 along the second direction Z. The light-exiting surface 202 is located on one side of the light-incident surface 201 along the third direction X. Light emitted from the light sources 100 is incident through the light-incident surface 201 into the broadening lens unit 210 and the elbow lens unit 220. The broadening lens unit 210 is used to form a near-beam broadening beam pattern, and the elbow lens unit 220 is used to form a near-beam elbow cutoff beam pattern. The near-beam elbow cutoff beam pattern and the near-beam broadening beam pattern are combined to form a near-beam beam pattern. The light-exiting surface 202 includes multiple sub-light-exiting surfaces 2021 arranged sequentially along the first direction Y. The distance between the root of each sub-light-exiting surface 2021 and the light source 100 in the third direction X gradually increases along the first direction Y. The first direction Y, the second direction Z, and the third direction X are all perpendicular to each other.

[0049] It is understandable that the second direction Z, the third direction X, and the first direction Y constitute a three-dimensional coordinate system, where the plane formed by the third direction X and the first direction Y is a horizontal plane, the second direction Z is the longitudinal direction, and the first direction Y is the lateral direction. When the low beam headlight module 10 is installed on the vehicle, the second direction Z can be the height direction of the vehicle, the third direction X can be the front-rear direction of the vehicle, and the first direction Y can be the left-right direction of the vehicle.

[0050] Light source 100 provides initial light, and light source 100 can be an LED (Light Emitting Diode) chip. The light emitted from light source 100 directly enters the light-incident surface 201 of the near-light lens 200.

[0051] The low beam lens 200 realizes the single-lens structure design of the low beam module 10. The low beam lens 200 can be made of optical plastics with high light transmittance, high refractive index, high temperature resistance, and good weather resistance, such as polymethyl methacrylate (PMMA) and polycarbonate (PC).

[0052] The low-beam lens 200 includes a widening lens unit 210 and an elbow lens unit 220, which are integrally molded. That is, the low-beam lens 200 is a single optical element containing two lens units with different functions. These two lens units are not manufactured separately and then assembled; instead, they are directly formed into an inseparable whole through a single processing step. The shared light-incident surface 201 and light-outcident surface 202 mean that while the widening lens unit 210 and the elbow lens unit 220 each achieve their respective functions through different optical surfaces, their light-incident surfaces 201 are interconnected to form the light-incident surface of the low-beam lens 200. Light from all light sources 100 enters the low-beam lens 200 through this light-incident surface 201. Similarly, their light-outcident surfaces 202 are interconnected to form the light-outcident surface of the low-beam lens 200, and light from all light sources 100 exits through this light-outcident surface 202.

[0053] Optionally, each light source 100 may correspond to either a widening lens unit 210 or an elbow lens unit 220. That is, the total number of widening lens units 210 and elbow lens units 220 is the same as the number of light sources 100, and there is a one-to-one correspondence. This arrangement can avoid problems such as blurred light patterns and light pattern distortion caused by light from the same light source 100 entering the two functional units through the light incident surface 201.

[0054] Optionally, refer to Figure 4 The light-incident surfaces 201 of the broadened lens unit 210 and the elbow lens unit 220 can be spliced ​​together to form a complete plane, and the orthographic projections of multiple light sources 100 on the light-incident surface 201 are all located within the light-incident surface 201.

[0055] The widening lens unit 210 is used to form a low beam widening beam pattern (Flat area) to achieve lateral (first direction Y) light expansion, forming a lateral wide illumination area that covers the road surface on the left and right sides in front of the vehicle.

[0056] The elbow lens unit 220 is used to form a near beam elbow cutoff line pattern (Kink zone). After the light is emitted from the elbow lens unit 220, a clear and sharp cutoff line with a lower left and higher right is formed in the far field, ensuring that while illuminating the road ahead, the light does not shine directly into the eyes of the oncoming driver and cause glare.

[0057] The light-emitting surface 202 is composed of a plurality of sub-light-emitting surfaces 2021 arranged sequentially. The distance from the root of each sub-light-emitting surface 2021 to the light source 100 in the third direction X gradually increases along the first direction Y. That is to say, in this application, the widening lens unit 210 and the elbow lens unit 220 share the light-emitting surface 202. However, the light-emitting surface 202 formed after the two are spliced ​​together is not a complete smooth large surface, but is divided into a plurality of tiny sub-light-emitting surfaces 2021. When viewed in the XY plane, the plurality of sub-light-emitting surfaces 2021 of the light-emitting surface 202 form a continuous stepped shape. The root of the sub-light-emitting surface 2021 refers to the connection position between the sub-light-emitting surface 2021 and the substrate of the near-light lens 200.

[0058] Understandably, referring to Figure 2 The light-emitting surface 202 includes a first side 2022 and a second side 2023 arranged opposite each other along the first direction Y. The distance between the root of each sub-light-emitting surface 2021 and the light source 100 in the third direction X gradually increases along the first direction Y. This means that, along the direction from the first side 2022 to the second side 2023, the distance between the root of each sub-light-emitting surface 2021 and the light source 100 in the third direction X gradually increases. At this time, the distance between the first side 2022 and the light source 100 in the third direction X will be less than the distance between the second side 2023 and the light source 100 in the third direction X. Alternatively, along the direction from the second side 2023 to the first side 2022, the distance between the root of each sub-light-emitting surface 2021 and the light source 100 in the third direction X gradually increases. At this time, the distance between the first side 2022 and the light source 100 in the third direction X will be greater than the distance between the second side 2023 and the light source 100 in the third direction X. This allows for a zigzag-shaped design of the light-emitting surface 202 along the first direction Y, satisfying the overall vehicle styling requirements.

[0059] The low beam module 10 of this application embodiment uses a single low beam lens 200 with an integrated molding structure to achieve the low beam pattern. Specifically, the low beam lens 200 includes a broadening lens unit 210 and an elbow lens unit 220. The light from the light source 100 forms a broadened low beam pattern after exiting through the broadening lens unit 210, and forms a elbow cutoff line low beam pattern after exiting through the elbow lens unit 220. The elbow cutoff line low beam pattern and the broadened low beam pattern are combined to form the low beam pattern. With this configuration, firstly, after the light emitted from the light source 100 enters the low beam lens 200, the light path propagation and shaping are completed inside the low beam lens 200, which is equivalent to combining the outer lens and inner lens in the traditional solution into one unit. The light does not pass through the lens / air interface, which can effectively reduce Fresnel loss and dispersion and improve luminous efficiency. Secondly, the light-emitting surface 202 includes a plurality of sub-light-emitting surfaces 2021 arranged in a stepped manner along the first direction Y. This design allows for a conformal shape of the light-emitting surface 202. Furthermore, compared to related technologies where the light-emitting surface is designed as a single, large curved surface, each sub-light-emitting surface 2021 can form an independent optical adjustment area. This enables each sub-light-emitting surface 2021 to more precisely and efficiently calibrate the light in different areas, forming zoned light calibration. This helps to improve the light loss and scattering problems caused by the inability of traditional conformal lenses to adapt their global focal length to all areas, thereby further improving the light output efficiency. Therefore, the embodiments of this application can effectively improve the light output efficiency of the low beam module 10.

[0060] Optionally, each sub-emitting surface 2021 has the same width along the first direction Y, for example, it can all be 5mm.

[0061] Optionally, along the first direction Y, the width of each sub-emitting surface 2021 is smaller than the width of the widening lens unit 210 and the elbow lens unit 220. For example, the width of each sub-emitting surface 2021 is less than half the width of the widening lens unit 210 and the elbow lens unit 220. In this way, the multiple sub-emitting surfaces 2021 can be divided more finely, thereby further improving the light efficiency.

[0062] In some embodiments, such as Figures 1 to 4 As shown, the light-emitting surface 202 also includes multiple connecting surfaces 2024. Two adjacent sub-light-emitting surfaces 2021 are connected by connecting surfaces 2024, and the connecting surfaces 2024 are perpendicular to the first direction Y.

[0063] In this embodiment, the light-emitting surface 202 also includes a connecting surface 2024 located between two adjacent sub-light-emitting surfaces 2021. First, the connecting surface 2024 can serve as a reference for optical partitioning, dividing the continuous and complex light-emitting surface 202 into multiple independent sub-light-emitting surfaces 2021, thereby improving the ease of fabrication of each sub-light-emitting surface 2021 and reducing costs. Second, each connecting surface 2024 also participates in light distribution as a light-emitting surface. Unexpected scattering or refraction of light may occur at the edges of the sub-light-emitting surfaces 2021, and the connecting surface 2024 can allow edge light to exit, avoiding stray light loss or the formation of dark areas at the edges of the light spot, ensuring that the final synthesized near-light spot is continuous, seamless, and has a natural transition, which also helps to improve the sharpness and uniformity of the near-light pattern and further improve the luminous efficiency.

[0064] In some embodiments, the lengths of each connecting surface 2024 in the third direction X are all the same. That is, in the third direction X, the distance between the roots of two adjacent sub-light-emitting surfaces 2021 is the same. This arrangement, on the one hand, facilitates the manufacturing of each sub-light-emitting surface 2021 and reduces costs. On the other hand, it also enhances the styling diversity and aesthetics of the conformal design of the light-emitting surface 202.

[0065] Optionally, such as Figure 1 and Figure 4 As shown, in some other embodiments, the length of each connecting surface 2024 in the third direction X gradually increases along the first direction Y.

[0066] This design, in conjunction with multiple sub-emitting surfaces 2021, can produce four different configurations. The first configuration involves the distance between the root of each sub-emitting surface 2021 and the light source 100 in the third direction X gradually increasing along the direction from the first side 2022 to the second side 2023. Simultaneously, the length of each connecting surface 2024 in the third direction X gradually increases along the same direction. The second configuration involves the same arrangement: the distance between the root of each sub-emitting surface 2021 and the light source 100 in the third direction X gradually increases along the same direction from the second side 2023 to the first side 2022. The third scheme involves the following: along the direction from the second side 2023 to the first side 2022, the distance between the root of each sub-light-emitting surface 2021 and the light source 100 in the third direction X gradually increases; simultaneously, along the direction from the first side 2022 to the second side 2023, the length of each connecting surface 2024 in the third direction X gradually increases. The fourth scheme involves the following: along the direction from the second side 2023 to the first side 2022, the distance between the root of each sub-light-emitting surface 2021 and the light source 100 in the third direction X gradually increases; simultaneously, along the direction from the second side 2023 to the first side 2022, the length of each connecting surface 2024 in the third direction X gradually increases.

[0067] This design helps to further enhance the styling diversity and aesthetics of the conformal design of the 202 light-emitting surface.

[0068] It should be noted that the above are merely illustrative descriptions of several schemes for the conformal design of the light-emitting surface 202 in this application. In related technologies, the surface between the first side 2022 and the second side 2023 is a single, bent, extended conformal curved surface. This application differentiates the curved surface in the third direction X and the first direction Y of the related technologies, dividing it into multiple sub-light-emitting surfaces 2021 and multiple connecting surfaces 2024. Therefore, the widths of the multiple sub-light-emitting surfaces 2021 in the first direction Y and the dimensions of the multiple connecting surfaces 2024 in the third direction X can be flexibly differentiated according to actual needs. For example, the widths of the multiple sub-light-emitting surfaces 2021 in the first direction Y can be made the same, then the dimensions of the multiple connecting surfaces 2024 in the third direction X depend on the curvature change of the curved surface; or, for another example, the dimensions of the multiple connecting surfaces 2024 in the third direction X can be made the same, then the widths of the multiple sub-light-emitting surfaces 2021 in the first direction Y also depend on the curvature change of the curved surface.

[0069] In other words, the widths of the multiple sub-light-emitting surfaces 2021 in the first direction Y may not be completely the same, may be completely the same, or may vary regularly; or the dimensions of the multiple connecting surfaces 2024 in the third direction X may not be completely the same, may be completely the same, or may vary regularly. This application does not limit the specific differential method.

[0070] like Figures 1 to 4 As shown, in some embodiments, the widening lens unit 210 and the elbow lens unit 220 also share the first total reflection surface 203. The widening lens unit 210 includes a second total reflection surface 211 and a third total reflection surface 212 corresponding to the light source 100. The elbow lens unit 220 includes a fourth total reflection surface 221 and a fifth total reflection surface 222 corresponding to the light source 100. The second total reflection surface 211 and the fourth total reflection surface 221 are arranged along the first direction Y, and the third total reflection surface 212 and the fifth total reflection surface 222 are arranged along the first direction Y and are opposite to the first total reflection surface 203 along the second direction Z.

[0071] Please refer to Figure 1 and Figure 5 The light emitted by the light source 100 is projected onto the second total reflection surface 211 through the light incident surface 201. After being reflected by the second total reflection surface 211, it is reflected in sequence by the third total reflection surface 212 and the first total reflection surface 203, and then emitted from the light exiting surface 202, forming a near-beam broadened light pattern. The light emitted by the light source 100 is projected onto the fourth total reflection surface 221 through the light incident surface 201. After being reflected by the fourth total reflection surface 221, it is reflected in sequence by the fifth total reflection surface 222 and the first total reflection surface 203, and then emitted from the light exiting surface 202, forming a near-beam elbow-shaped cutoff line light pattern.

[0072] This embodiment presents the specific structure of the widening lens unit 210 and the elbow lens unit 220. The widening lens unit 210 and the elbow lens unit 220 also share a first total reflection surface 203. The first total reflection surface 203 can be a complete smooth curved surface, and its width in the first direction Y is the width of the widening lens unit 210 and the elbow lens unit 220 after being spliced ​​together along the first direction Y.

[0073] The widening lens unit 210 includes a second total reflection surface 211 and a third total reflection surface 212, which, together with the shared first total reflection surface 203, light-incident surface 201 and light-outcident surface 202, complete the projection of a near-beam widening beam pattern.

[0074] Similarly, the elbow lens unit 220 includes a fourth total reflection surface 221 and a fifth total reflection surface 222, which, together with the shared first total reflection surface 203, light-incident surface 201 and light-outcident surface 202, complete the projection of the near-beam elbow cutoff line light pattern.

[0075] Based on the above structural design, firstly, after the light emitted from the light source 100 enters the low beam lens 200 through the light-incident surface 201, it is totally reflected by the second total reflection surface 211 and the fourth total reflection surface 221, respectively. Then, the third total reflection surface 212 and the first total reflection surface 203 fold the light in a "Z" shape, and the fifth total reflection surface 222 and the first total reflection surface 203 also fold the light in a "Z" shape, so that the light can be effectively collected and adjusted within a narrow lens space. In this way, in the second direction Z, the light-emitting surface 202 does not need a large opening size to efficiently receive the reflected light, which significantly reduces the size of the light-emitting surface 202 in the second direction Z, thereby helping to meet the narrow opening design requirements of the low beam module 10.

[0076] Secondly, the low beam module 10 achieves optical path folding through total internal reflection within the low beam lens 200, which also helps to reduce the size and weight of the lens, thereby contributing to energy saving and cost reduction.

[0077] Thirdly, the first total reflection surface 203 can be a complete smooth curved surface, which is beneficial to improving the static appearance consistency of the low beam lens 200, meeting different shape requirements such as horizontal elongated module shape, and also helps to reduce the processing difficulty of the low beam lens 200 and improve the processing yield.

[0078] In addition, it should be noted that in this application, each total reflection surface, light-incident surface 201, and light-outceasing surface 202 is the outermost transparent shaped surface of the near-light lens 200.

[0079] like Figure 6 , Figure 7 As shown and referenced Figures 1 to 4 In some embodiments, a beam of parallel light is incident from the light-emitting surface 202, converged by the light-emitting surface 202, and then reflected sequentially by the first total reflection surface 203 and the third total reflection surface 212, converging along the second direction Z and parallel along the first direction Y, converging on the focal line FF, the focal line FF being located on the side edge of the second total reflection surface 211 near the light-incident surface 201; a beam of parallel light is incident from the light-emitting surface 202, converged by the light-emitting surface 202, and then reflected sequentially by the first total reflection surface 203 and the fifth total reflection surface 222, focusing on the focal point f, the focal point f being located on the side edge of the fourth total reflection surface 221 near the light-incident surface 201.

[0080] This embodiment further proposes specific modulation methods for light by the widening lens unit 210 and the elbow lens unit 220. For the widening lens unit 210, after external parallel light enters the widening lens unit 210 through the light-emitting surface 202, a focal line FF is formed on the edge of the second total internal reflection surface 211 near the light-incident surface 201. The light-emitting surface 202 is mainly used to focus the parallel light incident from the light-emitting surface 202 along the second direction Z (longitudinal direction). The first total internal reflection surface 203 and the third total internal reflection surface 212 are used to match the light-emitting surface 202 and also serve to partially focus and fold the light path. Optionally, the light-emitting surface 202 can be a convex surface along the second direction Z (i.e., longitudinal direction).

[0081] In practical applications, the light emitted by the light source 100 is projected from the incident surface 201 onto the second total reflection surface 211, then reflected by the second total reflection surface 211 to the third total reflection surface 212, and exits sequentially through the first total reflection surface 203 and the light exiting surface 203. Therefore, focusing along the first direction Y (i.e., the lateral direction) can be achieved through the second total reflection surface 211.

[0082] In this way, horizontal and vertical focusing separation can be achieved, and the vertical focal length is greater than the horizontal focal length, which facilitates the realization of a wide near-light pattern that is wide laterally and narrow vertically. It also helps to narrow the opening size of the light-emitting surface 202 along the second direction Z (i.e., the longitudinal direction). In addition, the focal line FF is located on the edge of the second total internal reflection surface 211 near the light-incident surface 201, so that the edge of the second total internal reflection surface 211 near the light-incident surface 201 can project a horizontally extended cutoff line of the near-light pattern, which in turn helps to improve the sharpness and clarity of the near-light pattern.

[0083] For the elbow lens unit 220, after the external parallel light enters the interior of the elbow lens unit 220 through the light-emitting surface 202, a focal point f is formed on the edge of the fourth total internal reflection surface 221 near the light-incident surface 201. The light-emitting surface 202 is mainly used to focus the parallel light incident from the light-emitting surface 202 along the second direction Z (longitudinal direction). The fifth total internal reflection surface 222 is mainly used to focus the parallel light incident from the light-emitting surface 202 along the first direction Y (lateral direction). The first total internal reflection surface 203 is mainly used to match the light-emitting surface 202 and the fifth total internal reflection surface 222, and also plays a partial focusing role. The fifth total internal reflection surface 222 and the first total internal reflection surface 203 also serve to fold the light path.

[0084] In this way, horizontal and vertical focusing separation can be achieved, and the vertical focal length is greater than the horizontal focal length, which facilitates the realization of a near-light elbow-shaped cutoff line beam pattern that is wide horizontally and narrow vertically. It also helps to narrow the opening size of the light-emitting surface 202 along the second direction Z (i.e., the vertical direction). Optionally, the light-emitting surface 202 can be a convex surface along the second direction Z (i.e., the vertical direction), and the fifth total reflection surface 222 can be a convex surface along the first direction Y (i.e., the horizontal direction).

[0085] In practical applications, the light emitted by the light source 100 is projected from the incident surface 201 onto the fourth total reflection surface 221, then reflected by the fourth total reflection surface 221 to the fifth total reflection surface 222, and then exits through the first total reflection surface 203 and the light exiting surface 203 in sequence, forming a near-light elbow-shaped cutoff line light pattern.

[0086] Furthermore, in this embodiment, on the one hand, the focal point f is set at the edge of the fourth total internal reflection surface 221 near the light incident surface 201; on the other hand, as... Figure 3 and Figure 4 As shown, the edge of the fourth total internal reflection surface 221 near the incident light surface 201 is trimmed to form a cutoff line structure 2211, so that the image plane of the light source 100 presents a shape with a cutoff line. Therefore, the edge of the fourth total internal reflection surface 221 near the incident light surface 201 can project a near-beam elbow-shaped cutoff line pattern with a left-low, right-high cutoff line, which further helps to improve the clarity and sharpness of the near-beam elbow-shaped cutoff line pattern.

[0087] Optionally, the light-emitting surface 202 of the low beam lens 200 has a dimension along the second direction Z that is less than or equal to 12mm, such as 10mm, 10.5mm, 11mm, 11.5mm, 12mm, etc., which can be flexibly designed according to the actual situation.

[0088] like Figures 1 to 4 As shown, in some embodiments, the sub-light-emitting surfaces 2021 are all convex cylindrical surfaces extending along the second direction Z arc. The cylindrical surfaces can converge light in the second direction Z, but do not converge light in the first direction Y. The cylindrical structure is simple, which helps to improve the ease of manufacturing each sub-light-emitting surface 2021 and reduce costs.

[0089] Furthermore, in some embodiments, the radius of the cylinder is greater than or equal to 40 mm. That is, the cylinder is designed with a large radius of curvature, which can avoid excessive refraction of light, improve astigmatism and field curvature, thereby helping to improve the light output effect of the near beam pattern.

[0090] Optionally, the radius of the cylinder can be, for example, 40mm, 41mm, 42mm, 43mm, 44mm, 45mm, 46mm, 47mm, 48mm, 49mm, 50mm, etc., and can be flexibly designed according to the actual situation.

[0091] Furthermore, in some embodiments, the radii of each sub-emitting surface 2021 are the same, meaning that each sub-emitting surface 2021 is a cylindrical surface with the same curvature. This improves the ease of manufacturing each sub-emitting surface 2021 and reduces costs while increasing the emitted light efficiency.

[0092] In other embodiments, the second side 2023 is located on the side of the first side 2022 away from the light source 100, and the radius of each sub-light-emitting surface 2021 gradually increases from the first side 2022 to the second side 2023.

[0093] In this embodiment, the second side 2023 is located on the side of the first side 2022 away from the light source 100. That is, along the direction from the first side 2022 to the second side 2023, the distance between the root of each sub-light-emitting surface 2021 and the light source 100 in the third direction X gradually increases.

[0094] Understandably, a larger radius results in a weaker ability to converge light, corresponding to a longer focal length. In the direction from the first side 2022 to the second side 2023, the distance between the root of the sub-light-emitting surface 2021 and the light source 100 increases, leading to a longer light propagation distance and thus requiring a longer focal length to maintain focal point / focal line overlap. In this case, this embodiment sets the radius of each sub-light-emitting surface 2021 to gradually increase along the direction from the first side 2022 to the second side 2023, enabling shape-matched focal lengths for each sub-light-emitting surface 2021 and compensating for optical path differences. This further improves the light output efficiency of the low beam module 10.

[0095] like Figure 3 and Figure 4 As shown, in some embodiments, the multiple light sources 100 include multiple single-core LEDs 110 and multiple dual-core LEDs 120. The multiple single-core LEDs 110 are disposed on both sides of the multiple dual-core LEDs 120 along the first direction Y. There are multiple widening lens units 210 and elbow lens units 220. The widening lens units 210 are arranged in a one-to-one correspondence with the dual-core LEDs 120, and the elbow lens units 220 are arranged in a one-to-one correspondence with the single-core LEDs 110.

[0096] That is, the light emitted by the dual-core LED120 can be modulated by the optical path of the widening lens unit 210 to form a near-beam widened light pattern in the far field; the light emitted by the single-core LED110 can be modulated by the optical path of the elbow lens unit 220 to form a near-beam elbow cutoff line light pattern in the far field.

[0097] This configuration allows for several advantages. First, the emitted light from each light source 100 can be modulated via a corresponding widening lens unit 210 or elbow lens unit 220, thus improving the design and fabrication convenience of the widening lens unit 210 and elbow lens unit 220. Second, the number and arrangement of the light source 100, widening lens unit 210, and elbow lens unit 220 can be flexibly adjusted according to lighting requirements, further enhancing the versatility and expandability of the low beam module 10. Furthermore, the dual-core LED 120 has a larger luminous area, facilitating lateral light expansion to form a widened beam pattern; the single-core LED 110 has a smaller luminous surface and more concentrated light, facilitating horizontal and vertical light convergence to form a low beam cutoff line.

[0098] like Figure 3 and Figure 4 As shown, in a specific embodiment, there are four single-core LEDs 110 and four elbow lens units 220, and two dual-core LEDs 120 and two widening lens units 210. The second total reflection surfaces 211 of the two widening lens units 210 are symmetrically arranged along the third direction X. The optical axis L of the two second total reflection surfaces 211 is close to the end of the light source 100 and forms a preset angle with the third direction X.

[0099] In this embodiment, there are four elbow lens units 220 and two widening lens units 210. Their arrangement is as follows: along the first direction Y, there are two elbow lens units 220, two widening lens units 210, and two elbow lens units 220 in sequence.

[0100] Two widening lens units 210 are positioned in the middle to facilitate the lateral expansion of light along the first direction Y. Specifically, the second total internal reflection surfaces 211 of the two widening lens units 210 are symmetrically arranged along the third direction X and connected along the first direction Y. Furthermore, the ends of the optical axes L of the two second total internal reflection surfaces 211 that are away from the light source 100 are brought close to each other, such that their optical axes L form a preset angle with the third direction X. The preset angle can be, for example, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, etc.

[0101] Because the optical axes L of the two second total internal reflection surfaces 211 are close to each other at the ends opposite to the light source 100, when the light emitted from the two dual-core LEDs 120 is projected onto the two second total internal reflection surfaces 211 through the light incident surface 201, the light reflected from one of the second total internal reflection surfaces 211 will be deflected to one side of the other second total internal reflection surface 211. That is, along the first direction Y, the light reflected from the left second total internal reflection surface 211 is finally distributed in the right half of the light emitting surface 202, and the light reflected from the right second total internal reflection surface 211 is finally distributed in the left half of the light emitting surface 202. The right half and the left half are separated by the dividing line between the two second total internal reflection surfaces 211. This is beneficial for expanding the light along the first direction Y (i.e., laterally) to form a near-beam broadening light pattern, and also helps to eliminate dark areas.

[0102] Understandable, such as Figure 4 As shown, since the optical axes L of the two second total reflection surfaces 211 move closer to each other from the ends opposite to the light source 100, they are flipped. Consequently, the two dual-core LEDs 120 also flip, and the central axis of the dual-core LEDs 120 forms a preset angle with the third direction X. Thus, the matching setting of the dual-core LEDs 120 and the second total reflection surfaces 211 can be achieved, further improving the beam pattern effect of near beam broadening.

[0103] Please refer to Figure 8 , Figure 9 and Figure 10 , Figure 8 This is a diagram showing the illumination effect of the broadened portion of the low beam pattern of the low beam module 10 according to an embodiment of this application. Figure 9 This is a diagram illustrating the lighting effect of the elbow-shaped cutoff line light pattern of the low beam headlight module 10 according to an embodiment of this application. Figure 10 This is a diagram illustrating the lighting effect of the low beam pattern of the low beam module 10 according to an embodiment of this application. As can be seen from the diagram, the low beam module 10 of this embodiment can achieve excellent lighting effect of the low beam pattern.

[0104] like Figure 1 As shown, in some embodiments, the angle between the light-incident surface 201 and the third direction X is 30°. This allows the second total reflection surface 211 and the fourth total reflection surface 221 to reflect light onto the corresponding third total reflection surface 212 and fifth total reflection surface 222 with maximum efficiency, thereby improving light collection efficiency and thus improving light efficiency.

[0105] like Figure 1 , Figure 3 and Figure 4As shown, in some embodiments, the widening lens unit 210 and the elbow lens unit 220 also share the first surface 260 and the second surface 270. The light-emitting surface 202 is connected to the first total reflection surface 203 through the first surface 260, and the light-emitting surface 202 is connected to the third total reflection surface 212 and the fifth total reflection surface 222 through the second surface 270. The first surface 260 and / or the second surface 270 are provided with light guide tooth structures 261 arranged along the third direction X and extending along the first direction Y.

[0106] The light guide tooth structure 261 is serrated, including two intersecting tooth surfaces. When light propagates inside the low beam lens 200, some light inevitably enters the first surface 260 and / or the second surface 270. By setting the light guide tooth structure 261 on the first surface 260 and / or the second surface 270, this stray light can be reflected and refracted, separating the stray light from the main light path and guiding it to the non-light-emitting area. This eliminates stray light without affecting the propagation of the main light, thereby improving the lighting effect of the low beam pattern.

[0107] Secondly, embodiments of this application provide a vehicle lamp, including the low beam lamp module 10 described in the first aspect.

[0108] With this configuration, firstly, after the emitted light from the light source 100 enters the low beam lens 200, the light path propagation and shaping are completed inside the low beam lens 200. This is equivalent to combining the outer and inner lenses in the traditional solution into one unit, and the light does not pass through the lens / air interface, which can effectively reduce Fresnel loss and dispersion and improve luminous efficiency. Secondly, the light-emitting surface 202 includes multiple sub-light-emitting surfaces 2021 arranged in a stepped manner along the first direction Y. In this way, the conformal design of the light-emitting surface 202 can be realized. At the same time, compared with the conformal large curved surface design of the light-emitting surface in related technologies, each sub-light-emitting surface 2021 can form an optical adjustment area independently. This allows each sub-light-emitting surface 2021 to more finely and efficiently calibrate the light in different areas, forming a zoned light calibration. This helps to improve the light loss and scattering problems caused by the inability of the global focal length of traditional conformal surface lenses to adapt to all areas, and thus further improves the light emission efficiency. Therefore, the embodiments of this application can effectively improve the light emission efficiency of the low beam lamp module 10.

[0109] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A low beam headlight module, characterized in that, include: Multiple light sources are arranged at intervals along a first direction, and the light sources are used to emit light. A low-beam lens is disposed on the light-emitting side of the light source. The low-beam lens includes a broadening lens unit and an elbow lens unit, which are integrally formed. The broadening lens unit and the elbow lens unit share a light-incident surface and a light-emitting surface. The light-incident surface is disposed opposite to the plurality of light sources along a second direction, and the light-emitting surface is located on one side of the light-incident surface along a third direction. The broadening lens unit is used to form a low-beam broadening beam pattern, and the elbow lens unit is used to form a low-beam elbow cutoff line beam pattern. The low-beam elbow cutoff line beam pattern and the low-beam broadening beam pattern are combined to form a low-beam beam pattern. The light-emitting surface includes a plurality of sub-light-emitting surfaces arranged sequentially along the first direction. The distance between the root of each sub-light-emitting surface and the light source in the third direction gradually increases along the first direction. The first direction, the second direction, and the third direction are perpendicular to each other.

2. The low beam headlight module according to claim 1, characterized in that, The light-emitting surface also includes multiple connecting surfaces, and two adjacent sub-light-emitting surfaces are connected through the connecting surfaces, which are perpendicular to the first direction.

3. The low beam headlight module according to claim 2, characterized in that, All of the aforementioned connecting surfaces have the same length in the third direction; Alternatively, the length of each of the connecting surfaces in the third direction gradually increases along the first direction.

4. The low beam headlight module according to claim 1, characterized in that, The widening lens unit and the elbow lens unit also share the first total reflection surface; The widening lens unit includes a second total reflection surface and a third total reflection surface corresponding to each of the light sources. The elbow lens unit includes a fourth total reflection surface and a fifth total reflection surface corresponding to each of the light sources. The second total reflection surface and the fourth total reflection surface are arranged along the first direction. The third total reflection surface and the fifth total reflection surface are arranged along the first direction and are opposite to the first total reflection surface along the second direction. The light emitted by the light source is projected onto the second total reflection surface through the light incident surface. After being reflected by the second total reflection surface, it is reflected by the third total reflection surface and the first total reflection surface in sequence, and then emitted from the light exiting surface to form a near-beam broadened light pattern. The light emitted by the light source is projected onto the fourth total reflection surface through the light incident surface. After being reflected by the fourth total reflection surface, it is reflected by the fifth total reflection surface and the first total reflection surface in sequence, and then emitted from the light emitting surface to form a near-beam elbow-shaped cutoff line light pattern.

5. The low beam headlight module according to claim 4, characterized in that, A beam of parallel light is incident from the light-emitting surface, converges after passing through the light-emitting surface, and is then reflected sequentially by the first total reflection surface and the third total reflection surface. The light converges along the second direction and is parallel to the first direction, converging on the focal line. The focal line is located on the edge of the second total reflection surface near the light-emitting surface. A beam of parallel light is incident from the light-emitting surface, converges after passing through the light-emitting surface, and is then reflected sequentially by the first total reflection surface and the fifth total reflection surface, focusing at a focal point located on the edge of the fourth total reflection surface near the light-emitting surface.

6. The low beam headlight module according to any one of claims 1-5, characterized in that, The sub-light-emitting surfaces are all convex cylindrical surfaces extending along the arc of the second direction, wherein: The radii of all the sub-emitting surfaces are the same; Alternatively, the light-emitting surface has a first side and a second side arranged opposite to each other along the first direction, the second side being located on the side of the first side away from the light source, and the radius of each of the sub-light-emitting surfaces gradually increases from the first side to the second side.

7. The low beam headlight module according to claim 6, characterized in that, The radius of the cylindrical surface is greater than or equal to 40 mm.

8. The low beam headlight module according to claim 4, characterized in that, The plurality of light sources include a plurality of single-core LEDs and a plurality of dual-core LEDs, wherein the plurality of single-core LEDs are disposed on both sides of the plurality of dual-core LEDs along the first direction; There are multiple widening lens units and multiple elbow lens units. Each widening lens unit is configured to correspond one-to-one with a dual-core LED, and each elbow lens unit is configured to correspond one-to-one with a single-core LED.

9. The low beam headlight module according to claim 8, characterized in that, The number of single-core LEDs and elbow lens units is four each, and the number of dual-core LEDs and widening lens units is two each; The second total reflection surfaces of the two widening lens units are symmetrically arranged along the third direction, and the optical axes of the two second total reflection surfaces are close to each other at the ends opposite to the light source and form a preset angle with the third direction.

10. A vehicle light, characterized in that, Includes the low beam headlight module as described in any one of claims 1-9.

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