Low beam lens module and low beam illumination module
By using a one-piece molded low beam lens module design and folding the optical path with a total reflection surface and a focusing surface, the problem of low optical efficiency is solved, achieving high-efficiency optical performance and a compact headlight layout.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- MIND ELECTRONICS APPLIANCE CO LTD
- Filing Date
- 2025-07-07
- Publication Date
- 2026-06-23
Smart Images
Figure CN224397646U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of automotive lighting technology, and in particular to a low beam lens module and a low beam illumination module. Background Technology
[0002] The low beam lens module is an important component of the low beam lighting module in automotive lights. The low beam lens module in related technologies includes an inner lens and an outer lens. The light emitted by the light source needs to pass through different media such as the inner lens, air, and outer lens, resulting in a large Fresnel loss, which in turn leads to a low optical efficiency of the low beam lighting module. Utility Model Content
[0003] This application provides a low beam lens module and a low beam illumination module, aiming to improve the optical efficiency of the low beam illumination module.
[0004] The specific technical solution is as follows:
[0005] An embodiment of the first aspect of this application provides a low-beam lens module, the low-beam lens module including a first optical unit, the first optical unit being an integrally formed structure, the first optical unit including a first curved surface, a first total reflection surface, a second total reflection surface, and a first light-incident surface; the first curved surface is located on one side of the first total reflection surface along a first direction, the second total reflection surface is disposed opposite to the first total reflection surface along a second direction, the first light-incident surface is located on the side of the second total reflection surface close to the first curved surface along the first direction, the first direction being perpendicular to the second direction; a beam of parallel light is incident from the first curved surface, converged by the first curved surface, and then reflected by the first total reflection surface, converging at a first focal point, the first focal point being located at the second total reflection surface.
[0006] In the low beam lens module of this application embodiment, the first optical unit is a one-piece molded single-layer lens structure, which is equivalent to combining the outer lens and inner lens in the traditional solution into one unit. In this way, the light emitted by the light source does not pass through different media, thereby effectively reducing Fresnel loss and improving the optical efficiency of the low beam illumination module. In addition, the one-piece molded design of the first optical unit can reduce assembly tolerances, thereby improving the controllability of the light pattern. Furthermore, by setting the first total reflection surface and the second total reflection surface, the light path can be folded, which helps to shorten the size of the low beam lens module along the first direction and the second direction. On this basis, the first light incident surface is set on the side of the second total reflection surface along the first direction close to the first curved surface, so that the first light incident surface and the first curved surface are on the same side of the first total reflection surface and the second total reflection surface, which can further shorten the size of the low beam lens module along the first direction. Thus, the low beam lens module can better adapt to the compact layout requirements of the vehicle headlight.
[0007] In one embodiment, the distance between the geometric center of the first curved surface and the first focal point along the first direction is L1, and the distance between the geometric center of the first total reflection surface and the first focal point along the second direction is L2, wherein L1 > L2.
[0008] The distance between the geometric center of the first curved surface and the first focal point along the first direction is the longitudinal focal length, and the distance between the geometric center of the first total internal reflection surface and the first focal point along the second direction is the lateral focal length. That is, the longitudinal focal length is greater than the lateral focal length. In this embodiment, the first optical unit can achieve separation of the longitudinal and lateral focal lengths, and the longitudinal focal length is greater than the lateral focal length. This is beneficial for achieving a near-beam pattern that is wider laterally and narrower longitudinally, and it is also beneficial for narrowing the opening size of the first curved surface, which serves as the light-emitting surface, along the second direction (i.e., longitudinally).
[0009] In one embodiment, the first surface is a complete freeform surface, and the first total internal reflection surface is a complete freeform surface. This allows the first optical unit to have good static appearance consistency.
[0010] In one embodiment, the first optical unit further includes a first focusing surface, which is connected to and surrounds the first incident surface; a beam of light emitted by an external light source is incident through the first incident surface, converged by the first focusing surface to the second total reflection surface, and after being reflected by the second total reflection surface and the first total reflection surface, it is emitted from the first curved surface.
[0011] By setting a first focusing surface surrounding the first light-incident surface, the optical efficiency of the first optical unit can be improved by focusing the light beam.
[0012] In one embodiment, the first focusing surface is configured to converge a beam of light emitted from an external light source to a single point.
[0013] The light beam emitted by the external light source enters through the first incident surface, converges to the first focal point through the first focusing surface, and then exits through the first curved surface after being reflected by the second total reflection surface and the first total reflection surface. This arrangement helps to improve the optical efficiency of the first optical unit, thereby achieving better brightness to better meet lighting needs.
[0014] In one embodiment, the first curved surface has a first side and a second side disposed opposite to each other along the second direction. The first side is connected to the first total reflection surface via a first connecting surface that extends along the first direction. The first total reflection surface is connected to the second total reflection surface via a second connecting surface. The second total reflection surface is connected to the first focusing surface via a third connecting surface that extends along the first direction. The second side is connected to the first focusing surface sequentially via a fourth connecting surface and a fifth connecting surface that extends along the first direction. The fourth connecting surface extends along the first direction, and the fifth connecting surface extends along the second direction.
[0015] This configuration allows the first curved surface, the first total reflection surface, the second total reflection surface, and the first focusing surface to be connected by a thick-walled structure between the first connecting surface, the second connecting surface, the third connecting surface, the fourth connecting surface, and the fifth connecting surface. This configuration is more conducive to forming a low beam pattern that is wider laterally and narrower vertically, and it also allows for a more flexible design space for the first curved surface, the first total reflection surface, and the second total reflection surface.
[0016] In one embodiment, the near-light lens module further includes a second optical unit, which shares the first curved surface and the second total internal reflection surface with the first optical unit; the second optical unit further includes a third total internal reflection surface and a second light-incident surface, the third total internal reflection surface and the first total internal reflection surface are arranged along a third direction, the third total internal reflection surface and the second total internal reflection surface are arranged opposite each other along a second direction, the second light-incident surface and the first light-incident surface are arranged along the third direction, the second light-incident surface is located on the side of the second total internal reflection surface closer to the first curved surface along the first direction, and the third direction is perpendicular to both the first direction and the second direction; a beam of parallel light is incident from the first curved surface, converged by the first curved surface, and then reflected by the third total internal reflection surface, converging at a first focal line, the first focal line being parallel to the third direction.
[0017] The second optical unit is used to form the broadened portion of the near-beam pattern. The center brightness portion and the broadened portion together constitute the near-beam pattern. Since the second optical unit shares the first curved surface and the second total internal reflection surface with the first optical unit, the first curved surface in the second optical unit is used to focus the parallel light incident from the first curved surface along the second direction, and the third total internal reflection surface is used to match the first curved surface and also serves to fold the optical path.
[0018] Based on the fact that the second optical unit shares the first curved surface and the second total internal reflection surface with the first optical unit, a second optical unit capable of realizing the broadened portion of the low beam pattern can be constructed by setting a third total internal reflection surface and a second light-incident surface. Furthermore, the third and second total internal reflection surfaces can fold the optical path, thereby helping to shorten the size of the low beam lens module along the first and second directions. Moreover, by placing the second light-incident surface on the side of the second total internal reflection surface closer to the first curved surface along the first direction, the second light-incident surface and the first curved surface are located on the same side of the third and second total internal reflection surfaces in the second optical unit. This further shortens the size of the low beam lens module along the first direction. Therefore, the low beam lens module can better adapt to the compact layout requirements of the vehicle headlight.
[0019] In one embodiment, the second optical unit and the first optical unit are integrally formed.
[0020] This configuration ensures that the light emitted from the light source does not pass through different media during its propagation in the second optical unit. This effectively reduces Fresnel loss, thereby improving the optical efficiency of the low-beam illumination module. Furthermore, it helps to reduce assembly tolerances, thus improving the controllability of the light pattern.
[0021] In one embodiment, the second optical unit further includes a second focusing surface, which is connected to and surrounds the second incident surface; a beam of light emitted by an external light source is incident through the second incident surface, converged by the second focusing surface to the second total reflection surface, and after being reflected by the second total reflection surface and the third total reflection surface, it is emitted from the first curved surface.
[0022] By setting a second focusing surface around the second incident surface to converge the light beam, the optical efficiency of the second optical unit can be improved.
[0023] In one embodiment, the second focusing surface is configured to collimate the light beam emitted by an external light source.
[0024] The light beam emitted by the external light source enters through the second incident surface, is collimated by the converging effect of the second focusing surface, and then exits through the first curved surface after being reflected by the second and third total internal reflection surfaces. This arrangement can form a broadened portion of the near-beam pattern and is beneficial to improving the optical efficiency of the second optical unit.
[0025] An embodiment of the second aspect of this application provides a low beam illumination module, which includes a light source module and a low beam lens module as described in any of the above embodiments, wherein the light source module includes multiple light sources.
[0026] The lighting module in this application embodiment is based on the same inventive concept as the low beam lens module in the above embodiment. Therefore, the lighting module can obtain the beneficial effects of the low beam lens module in the corresponding embodiment. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the structure of a low beam lens module provided in one embodiment of this application;
[0028] Figure 2 A schematic diagram of the low beam lens module provided in one embodiment of this application from another perspective;
[0029] Figure 3 This is a bottom view schematic diagram of a low beam lens module provided in an embodiment of this application;
[0030] Figure 4 for Figure 3 Schematic diagram of section AA;
[0031] Figure 5 for Figure 3 Schematic diagram of the BB section;
[0032] Figure 6 This is a schematic diagram of the propagation path of light in the first optical unit.
[0033] Figure 7 This is a schematic diagram of the propagation path of light in the first optical unit.
[0034] Figure 8 This is a schematic diagram of the propagation path of light in the first optical unit.
[0035] Figure 9 This is a schematic diagram of the propagation path of light in the second learning unit;
[0036] Figure 10 A schematic diagram of the propagation path of the line in the second learning unit;
[0037] Figure 11 A schematic diagram of the propagation path of the line in the second learning unit.
[0038] The annotations in the attached figures are explained as follows:
[0039] 10. Low beam lens module; 20. Light source;
[0040] 101. First optical unit; 102. Second optical unit;
[0041] 11. First surface; 111. First edge; 112. Second edge;
[0042] 12. First total reflection surface; 13. Second total reflection surface; 14. First light-incident surface; 15. First light-concentrating surface; 16. Third total reflection surface; 17. Second light-incident surface; 18. Second light-concentrating surface; 21. First connecting surface; 22. Second connecting surface; 23. Third connecting surface; 24. Fourth connecting surface; 25. Fifth connecting surface;
[0043] X, first direction; Y, second direction; Z, third direction; F, first focal point; FF, first focal line. Detailed Implementation
[0044] 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.
[0045] 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 patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0046] 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.
[0047] 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.
[0048] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0049] The low beam lens module is an important component of the low beam illumination module. The low beam lens module in related technologies includes an inner lens and an outer lens. The light emitted by the light source needs to pass through different media such as the inner lens, air, and outer lens, which leads to a large Fresnel loss and thus a low optical efficiency of the low beam illumination module.
[0050] Based on the above, this application provides a low beam lens module and a low beam illumination module having the same, aiming to improve the optical efficiency of the illumination module.
[0051] like Figure 1 , Figure 2 , Figure 3 , Figure 4 as well as Figure 6 As shown, the near-light lens module 10 in the first aspect embodiment of this application includes a first optical unit 101, which is an integrally formed structure. The first optical unit 101 includes a first curved surface 11, a first total reflection surface 12, a second total reflection surface 13, and a first light-incident surface 14. The first curved surface 11 is located on one side of the first total reflection surface 12 along the first direction X. The second total reflection surface 13 is disposed opposite to the first total reflection surface 12 along the second direction Y. The first light-incident surface 14 is located on the side of the second total reflection surface 13 along the first direction X, close to the first curved surface 11. The first direction X is perpendicular to the second direction Y. A beam of parallel light is incident from the first curved surface 11, converged by the first curved surface 11, and then reflected by the first total reflection surface 12, converging at a first focal point F. The first focal point F is located on the second total reflection surface 13.
[0052] Specifically, the first optical unit 101 is used to form the central brightness portion of the near-beam pattern. The first curved surface 11 is used to focus the parallel light incident from the first curved surface 11 along the second direction Y, and the first total internal reflection surface 12 is used to focus the parallel light incident from the first curved surface 11 along the third direction Z, wherein the third direction Z is perpendicular to both the first direction X and the second direction Y. Furthermore, the first total internal reflection surface 12 and the second total internal reflection surface 13 also have the function of folding the optical path.
[0053] The first surface 11 can be a convex surface protruding along the first direction X, so that parallel light incident through the first surface 11 can be focused along the second direction Y. The first total internal reflection surface 12 can be a convex surface (viewed from the outside of the low beam lens module 10) so that the first total internal reflection surface 12 can focus the parallel light incident from the first surface 11 along the third direction Z.
[0054] Combination Figure 7 , Figure 8 As shown, it should be noted that when the low-beam lens module 10 is used, the light beam emitted by the external light source 20 is incident through the first incident surface 14, reflected by the second total internal reflection surface 13 and the first total internal reflection surface 12, and then exits through the first curved surface 11. Therefore, the statement above that "a beam of parallel light is incident through the first curved surface 11, converges through the first curved surface 11, and then reflects through the first total internal reflection surface 12 to converge at the first focal point F" is only to illustrate the optical characteristics of the first curved surface 11 and the first total internal reflection surface 12, and does not represent the actual light path propagation direction of the first optical unit 101 during application.
[0055] In the low beam lens module 10 of this embodiment, the first optical unit 101 is a one-piece molded single-layer lens structure, which is equivalent to combining the outer lens and inner lens in the traditional solution into one piece. In this way, the light emitted by the light source 20 does not pass through different media, thereby effectively reducing Fresnel loss and improving the optical efficiency of the low beam illumination module. In addition, the one-piece molded design of the first optical unit 101 can reduce assembly tolerances, thereby improving the controllability of the light pattern.
[0056] Furthermore, by setting the first total reflection surface 12 and the second total reflection surface 13, the optical path can be folded, which helps to shorten the size of the low beam lens module 10 along the first direction X and the second direction Y. Based on this, the first light-incident surface 14 is positioned on the side of the second total reflection surface 13 along the first direction X, close to the first curved surface 11, so that the first light-incident surface 14 and the first curved surface 11 are on the same side of the first total reflection surface 12 and the second total reflection surface 13. This further shortens the size of the low beam lens module 10 along the first direction X. Therefore, the low beam lens module 10 can better adapt to the compact layout requirements of the vehicle headlight.
[0057] In some embodiments, the first curved surface 11 is a complete freeform surface, and the first total reflection surface 12 is a complete freeform surface. This allows the first optical unit 101 to have better static appearance consistency.
[0058] like Figure 6As shown, in some embodiments, the distance between the geometric center of the first curved surface 11 and the first focal point F along the first direction X is L1, and the distance between the geometric center of the first total reflection surface 12 and the first focal point F along the second direction Y is L2, wherein L1 > L2.
[0059] In this design, both the first direction X and the third direction Z are horizontal, meaning the plane formed by the first direction X and the third direction Z is a horizontal plane, and the second direction Y is longitudinal. Correspondingly, the distance between the geometric center of the first curved surface 11 and the first focal point F along the first direction X is the longitudinal focal length, and the distance between the geometric center of the first total reflection surface 12 and the first focal point F along the second direction Y is the lateral focal length. In other words, the longitudinal focal length is greater than the lateral focal length.
[0060] In this embodiment, the first optical unit 101 can separate the longitudinal focal length and the lateral focal length, and the longitudinal focal length is greater than the lateral focal length. This is beneficial for achieving a near-beam pattern that is wide laterally and narrow longitudinally, and also for narrowing the opening size of the first curved surface 11, which serves as the light-emitting surface, along the second direction Y (i.e., longitudinal direction).
[0061] like Figure 1 , Figure 4 as well as Figure 8 As shown, in some embodiments, the first optical unit 101 further includes a first focusing surface 15, which is connected to and surrounds the first incident surface 14. The light beam emitted by the external light source 20 is incident through the first incident surface 14, converged by the first focusing surface 15 to the second total reflection surface 13, and after being reflected by the second total reflection surface 13 and the first total reflection surface 12, it is emitted from the first curved surface 11.
[0062] The first focusing surface 15 can be a bowl-shaped total internal reflection freeform surface arranged around the first incident surface 14, mainly serving to focus the light. By setting the first focusing surface 15 around the first incident surface 14, the light beam can be focused, thereby improving the optical efficiency of the first optical unit 101.
[0063] like Figure 8 As shown, in one embodiment, the first focusing surface 15 is configured to converge the light beam emitted by the external light source 20 to a single point. This point may be a first focal point F. The light beam emitted by the external light source 20 is incident from the first incident surface 14, converged to the first focal point F by the first focusing surface 15, and then reflected by the second total internal reflection surface 13 and the first total internal reflection surface 12 before exiting from the first curved surface 11. This configuration helps to improve the optical efficiency of the first optical unit 101, thereby achieving better brightness to better meet lighting requirements.
[0064] like Figure 1 , Figure 2 as well as Figure 4As shown, in one embodiment, the first curved surface 11 has a first side 111 and a second side 112 disposed opposite to each other along a second direction Y. The first side 111 is connected to the first total reflection surface 12 via a first connecting surface 21, which extends along a first direction X. The first total reflection surface 12 is connected to the second total reflection surface 13 via a second connecting surface 22. The second total reflection surface 13 is connected to the first focusing surface 15 via a third connecting surface 23, which extends along the first direction X. The second side 112 is connected to the first focusing surface 15 sequentially via a fourth connecting surface 24 and a fifth connecting surface 25, which extend along the first direction X and the fifth connecting surface 25 extend along the second direction Y.
[0065] This configuration allows the first curved surface 11, the first total reflection surface 12, the second total reflection surface 13, and the first focusing surface 15 to be connected by a thick-walled structure between the first connecting surface 21, the second connecting surface 22, the third connecting surface 23, the fourth connecting surface 24, and the fifth connecting surface 25. This configuration is more conducive to forming a near-beam pattern that is wider laterally and narrower vertically, and it also allows for a more flexible design space for the first curved surface 11, the first total reflection surface 12, and the second total reflection surface 13.
[0066] like Figure 1 , Figure 2 , Figure 3 , Figure 5 as well as Figure 9 , Figure 10 As shown, in some embodiments, the near-beam lens module 10 further includes a second optical unit 102, which shares a first curved surface 11 and a second total internal reflection surface 13 with the first optical unit 101. The second optical unit 102 also includes a third total internal reflection surface 16 and a second light-incident surface 17. The third total internal reflection surface 16 and the first total internal reflection surface 12 are arranged along a third direction Z, and the third total internal reflection surface 16 and the second total internal reflection surface 13 are arranged opposite each other along a second direction Y. The second light-incident surface 17 and the first light-incident surface 14 are arranged along a third direction Z. The second light-incident surface 17 is located on the side of the second total internal reflection surface 13 near the first curved surface 11 along a first direction X. The third direction Z is perpendicular to both the first direction X and the second direction Y. A beam of parallel light is incident from the first curved surface 11, converged by the first curved surface 11, and then reflected by the third total internal reflection surface 16, converging at a first focal line FF, which is parallel to the third direction Z.
[0067] The second optical unit 102 is used to form the broadened portion in the near-beam pattern. The center brightness portion and the broadened portion together constitute the near-beam pattern. Since the second optical unit 102 shares the first curved surface 11 and the second total internal reflection surface 13 with the first optical unit 101, in the second optical unit 102, the first curved surface 11 is used to focus the parallel light incident from the first curved surface 11 along the second direction Y, and the third total internal reflection surface 16 is used to match the first curved surface 11 and also serves to fold the optical path.
[0068] It should be noted that when the low-beam lens module 10 is used, the light beam emitted by the external light source 20 is incident through the second incident surface 17, reflected by the second total internal reflection surface 13 and the third total internal reflection surface 16, and then exits through the first curved surface 11. Therefore, the statement above that "a beam of parallel light is incident through the first curved surface 11, converged by the first curved surface 11, and then reflected by the third total internal reflection surface 16 to converge at the first focal line FF" is only to illustrate the optical characteristics of the first curved surface 11 and the third total internal reflection surface 16, and does not represent the actual light path propagation direction of the second optical unit 102 during application.
[0069] Based on the fact that the second optical unit 102 shares the first curved surface 11 and the second total reflection surface 13 with the first optical unit 101, a second optical unit 102 capable of realizing the broadened portion of the low beam pattern can be constructed by setting a third total reflection surface 16 and a second light-incident surface 17. Furthermore, the optical path can be folded by the third total reflection surface 16 and the second total reflection surface 13, thereby facilitating a reduction in the size of the low beam lens module 10 along the first direction X and the second direction Y. Moreover, by setting the second light-incident surface 17 on the side of the second total reflection surface 13 along the first direction X, closer to the first curved surface 11, in the second optical unit 102, the second light-incident surface 17 and the first curved surface 11 are located on the same side of the third total reflection surface 16 and the second total reflection surface 13, thus further reducing the size of the low beam lens module 10 along the first direction X. Therefore, the low beam lens module 10 can better adapt to the requirements of a compact internal layout of the vehicle headlight.
[0070] In one embodiment, the second optical unit 102 and the first optical unit 101 are integrally formed. This arrangement ensures that the light emitted from the light source 20 does not pass through different media during its propagation within the second optical unit 102, thereby effectively reducing Fresnel loss and improving the optical efficiency of the low-beam illumination module. Furthermore, it also helps to reduce assembly tolerances, thus improving the controllability of the light pattern.
[0071] like Figure 1 , Figure 5 as well as Figure 11As shown, in some embodiments, the second optical unit 102 further includes a second focusing surface 18, which is connected to and surrounds the second incident surface 17. The light beam emitted by the external light source 20 is incident through the second incident surface 17, converged by the second focusing surface 18 to the second total reflection surface 13, and after being reflected by the second total reflection surface 13 and the third total reflection surface 16, it is emitted from the first curved surface 11.
[0072] The second focusing surface 18 can be a bowl-shaped total internal reflection freeform surface arranged around the second incident surface 17, mainly serving to focus the light. By setting the second focusing surface 18 around the second incident surface 17, the light beam can be focused, thereby improving the optical efficiency of the second optical unit 102.
[0073] like Figure 11 As shown, in one embodiment, the second focusing surface 18 is configured to collimate the light beam emitted by the external light source 20. The light beam emitted by the external light source 20 is incident through the second incident surface 17, collimated by the converging effect of the second focusing surface 18, and then reflected by the second total internal reflection surface 13 and the third total internal reflection surface 16 before exiting through the first curved surface 11. This configuration can form a broadened portion of the near-beam pattern and is beneficial to improving the optical efficiency of the second optical unit 102.
[0074] like Figure 5 As shown, in one embodiment, the first side 111 of the first curved surface 11 is also connected to the third total reflection surface 16 via the first connecting surface 21, the third total reflection surface 16 is also connected to the second total reflection surface 13 via the second connecting surface 22, and the second total reflection surface 13 is also connected to the second focusing surface 18 via the third connecting surface 23. The second side 112 of the first curved surface 11 is also connected to the second focusing surface 18 via the fourth connecting surface 24 and the fifth connecting surface 25 in sequence.
[0075] This configuration allows the first curved surface 11, the third total reflection surface 16, the second total reflection surface 13, and the second focusing surface 18 to be connected by a thick-walled structure between the first connecting surface 21, the second connecting surface 22, the third connecting surface 23, the fourth connecting surface 24, and the fifth connecting surface 25. This configuration is more conducive to forming a near-beam pattern that is wider laterally and narrower vertically, and it also allows for a more flexible design space for the first curved surface 11, the second total reflection surface 13, and the third total reflection surface 16.
[0076] The lighting module in the second aspect of this application includes a light source 20 module and a low beam lens module 10 in any of the above embodiments, wherein the light source 20 module includes a plurality of light sources 20.
[0077] It is understandable that each light-incident surface can be provided with a corresponding light source 20. For example, each first light-incident surface 14 can be provided with a light source 20. As another example, if the lighting module also includes a second optical unit 102, each second light-incident surface 17 can also be provided with a light source 20.
[0078] The lighting module in this application embodiment is based on the same inventive concept as the low beam lens module 10 in the above embodiment. Therefore, the lighting module can obtain the beneficial effects of the low beam lens module 10 in the corresponding embodiment.
[0079] 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 lens module, characterized in that, The low-beam lens module includes a first optical unit, which is an integrally formed structure. The first optical unit includes a first curved surface, a first total reflection surface, a second total reflection surface, and a first light-incident surface. The first curved surface is located on one side of the first total reflection surface along the first direction, the second total reflection surface is disposed opposite to the first total reflection surface along the second direction, the first light incident surface is located on the side of the second total reflection surface close to the first curved surface along the first direction, and the first direction is perpendicular to the second direction; A beam of parallel light is incident on the first curved surface, converges after passing through the first curved surface, and is then reflected by the first total reflection surface, converging at the first focal point, which is located on the second total reflection surface.
2. The low-beam lens module according to claim 1, characterized in that, The distance between the geometric center of the first curved surface and the first focal point along the first direction is L1, and the distance between the geometric center of the first total reflection surface and the first focal point along the second direction is L2, where L1 > L2; And / or, the first surface is a complete freeform surface, and the first total reflection surface is a complete freeform surface.
3. The low-beam lens module according to claim 1, characterized in that, The first optical unit further includes a first light-concentrating surface, which is connected to and surrounds the first light-incident surface; The light beam emitted by the external light source is incident on the first light-incident surface, converged to the second total reflection surface by the first light-concentrating surface, and after being reflected by the second total reflection surface and the first total reflection surface, it is emitted out from the first curved surface.
4. The low-beam lens module according to claim 3, characterized in that, The first focusing surface is configured to converge the light beam emitted by the external light source to a single point.
5. The low-beam lens module according to claim 3, characterized in that, The first curved surface has a first side and a second side arranged opposite to each other along the second direction. The first side is connected to the first total reflection surface through a first connecting surface, which extends along the first direction. The first total reflection surface is connected to the second total reflection surface through a second connecting surface. The second total reflection surface is connected to the first focusing surface through a third connecting surface, which extends along the first direction. The second side is connected to the first light-concentrating surface in sequence through the fourth connecting surface and the fifth connecting surface. The fourth connecting surface extends along the first direction, and the fifth connecting surface extends along the second direction.
6. The low-beam lens module according to claim 1, characterized in that, The low-light lens module further includes a second optical unit, which shares the first curved surface and the second total reflection surface with the first optical unit; The second optical unit further includes a third total reflection surface and a second light incident surface. The third total reflection surface and the first total reflection surface are arranged along a third direction. The third total reflection surface and the second total reflection surface are arranged opposite each other along the second direction. The second light incident surface and the first light incident surface are arranged along the third direction. The second light incident surface is located on the side of the second total reflection surface that is close to the first curved surface along the first direction. The third direction is perpendicular to both the first direction and the second direction. A beam of parallel light is incident on the first curved surface, converges after passing through the first curved surface, and is then reflected by the third total internal reflection surface, converging at the first focal line, which is parallel to the third focal line.
7. The low-beam lens module according to claim 6, characterized in that, The second optical unit and the first optical unit are integrally formed.
8. The low-beam lens module according to claim 6, characterized in that, The second optical unit further includes a second light-concentrating surface, which is connected to and surrounds the second light-incident surface; The light beam emitted by the external light source is incident on the second incident surface, converged to the second total reflection surface by the second focusing surface, and after being reflected by the second total reflection surface and the third total reflection surface, it is emitted out from the first curved surface.
9. The low-beam lens module according to claim 8, characterized in that, The second focusing surface is configured to collimate the light beam emitted by the external light source.
10. A low beam illumination module, characterized in that, It includes a light source module and a low-beam lens module as described in any one of claims 1 to 8, wherein the light source module includes multiple light sources.