Low-beam widening focal line lens, related lens module and lighting module

Abstract

The present application relates to the technical field of vehicle lamps. Disclosed are a low-beam widening focal line lens, a related lens module and a lighting module. The low-beam widening focal line lens comprises a first curved surface, a first total reflection surface and a second total reflection surface that are integrally formed. A beam of parallel light is incident on the first curved surface, converged by the first curved surface, then reflected by the first total reflection surface and the second total reflection surface, and converged to a focal line. By means of the integrally formed focal line lens structure, vertical focusing is achieved, such that horizontal and vertical focusing are separated, and the vertical focal length is greater than the horizontal focal length, thereby helping to achieve a low-beam widened light pattern that is wide in the horizontal direction and narrow in the vertical direction; the integrally formed focal line lens is a single-layer lens, which effectively reduces Fresnel loss; total reflection can be used to fold an optical path and shorten the size, which reduces the volume and weight of the lens while improving the optical efficiency, thereby facilitating energy saving and cost saving; with less refraction, the projected light pattern exhibits low chromatic dispersion and good color uniformity; and the lens has good consistency in static appearance, thereby helping to meet different styling requirements.

Description

Near-beam widening focal length lens and related lens modules, illumination module Technical Field

[0001] This application relates to the field of automotive lighting technology, and in particular to a low beam widening focal length lens and related lens modules and lighting modules. Background Technology

[0002] Existing low beam illumination lens modules typically consist of two or more layers of lenses, including an inner lens and an outer lens. The outer lens is usually a single-layer single-focal lens, or a single-layer multifocal lens composed of multiple single-layer single-focal lenses.

[0003] In related technologies, low beam illumination lens modules have the following disadvantages: First, because a single-layer single-focal lens has the same focusing degree in both the horizontal and vertical directions, the controllability of the beam pattern for low beams that are flat vertically and wide horizontally (i.e., wide horizontally and narrow vertically) is poor. Second, single-layer single-focal lenses are limited by aperture size and volume and weight. Once the horizontal aperture is long, the lens thickness and weight will increase accordingly, which is not conducive to the lightweighting of the lens module, nor to energy saving and cost reduction, and it is also not conducive to forming a horizontally elongated module shape, which has become one of the industry development trends. Third, single-layer multifocal lenses are spliced ​​together from multiple single-layer single-focal lenses, resulting in a poor overall static appearance of the lens. Fourth, in existing low beam illumination lens modules, the inner lens and outer lens are separated. The light emitted by the light source must pass through different media such as the inner lens, air, and outer lens, resulting in significant Fresnel loss and severe dispersion. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides a near-beam broadening focal line lens and related lens modules and illumination modules. Through an integrally formed focal line lens structure, longitudinal focusing is achieved into a single focal line, while lateral focusing can be achieved separately through a near-beam broadening total internal reflection lens structure. This achieves separation of longitudinal and lateral focusing, with the longitudinal focal length greater than the lateral focal length, facilitating the creation of a near-beam broadening beam pattern that is wider laterally and narrower longitudinally. Furthermore, the integrally formed focal line lens is a single-layer lens structure, effectively reducing Fresnel loss. Utilizing total internal reflection, the optical path can be folded, shortening the size and improving luminous efficiency while reducing the lens's volume and weight, thus contributing to energy saving and cost reduction. Simultaneously, less refraction results in low dispersion and good color uniformity of the projected light pattern. Additionally, both the light-emitting surface and the total internal reflection surface can be complete surfaces, ensuring good consistency in the lens's static appearance and facilitating the fulfillment of different design requirements, such as horizontally elongated module shapes.

[0005] In a first aspect, embodiments of this application provide a near-beam broadening focal-line lens. The near-beam broadening focal-line lens is an integrally formed structure, comprising a first curved surface, a first total reflection surface, and a second total reflection surface. The first and second total reflection surfaces are disposed opposite each other along a first direction. The first curved surface is located on one side of the first total reflection surface along a second direction, and the first and second directions are perpendicular. This near-beam broadening focal-line lens is configured such that a beam of parallel light is incident from the first curved surface, converges after passing through the first curved surface, and then is reflected sequentially by the first and second total reflection surfaces, converging along the first direction and parallel to a third direction, converging at a first focal line. The third direction is perpendicular to both the first and second directions. The first focal line is located on the side of the second total reflection surface opposite to the first curved surface along the second direction, and extends along the third direction.

[0006] Optionally, the first curved surface has a first side and a second side disposed opposite to each other along a first direction. The first side of the first curved surface is connected to the first total reflection surface through a first connecting surface, and the first connecting surface extends along a second direction.

[0007] The second side of the first curved surface is connected to the second total reflection surface through the second connecting surface, and the second connecting surface extends along the second direction.

[0008] Optionally, the near-light broadening focal length lens has a Z-shaped structure.

[0009] Optionally, the near-beam broadening focal line lens has an inverted Z-shaped structure.

[0010] Optionally, the first curved surface has a first side and a second side disposed opposite to each other along a first direction, the first side being directly connected to the first total reflection surface and the second side being directly connected to the second total reflection surface.

[0011] Optionally, the first surface is a complete freeform surface, and the first total reflection surface is a complete freeform surface or a plane.

[0012] Optionally, the first surface is a convex surface along a first direction.

[0013] Optionally, the first total reflection surface is a complete freeform surface or a plane.

[0014] Optionally, the second total reflection surface is a curved surface or a plane.

[0015] Secondly, embodiments of this application provide a near-beam broadening lens module, which includes a near-beam broadening total internal reflection lens unit and a near-beam broadening focal line lens unit. The near-beam broadening total internal reflection lens unit includes a first light-incident surface and a first reflective cup surface. The first light-incident surface is the surface of the near-beam broadening total internal reflection lens unit that faces away from the near-beam broadening focal line lens unit, and the first reflective cup surface is deflected relative to the first light-incident surface of the near-beam broadening focal line lens unit.

[0016] The near-beam broadening focal-line lens unit is any of the aforementioned near-beam broadening focal-line lenses, with the first focal line located on the edge of the first reflective bowl surface near the first incident surface. This near-beam broadening lens module is configured such that light emitted from an external light source is incident through the first incident surface, converges to the first reflective bowl surface, is reflected by the first reflective bowl surface, and then sequentially reflected by the second total internal reflection surface and the first total internal reflection surface, finally exiting through the first curved surface. The shape of the first reflective bowl surface is projected as a near-beam broadening beam pattern, and the edge of the first reflective bowl surface near the first incident surface is projected as the cutoff line of the near-beam broadening beam pattern.

[0017] Optionally, the near-beam broadening total internal reflection lens unit and the near-beam broadening focal line lens unit are integrally molded structures.

[0018] Optionally, the near-light broadening total internal reflection lens unit and the near-light broadening focal line lens unit are separate structures.

[0019] Optionally, there are two near beam widening total internal reflection lens units, which are arranged side by side adjacent to each other along a third direction, and are also arranged symmetrically along a second direction.

[0020] Two near-beam widening total internal reflection lens units correspond to the same near-beam widening focal line lens unit.

[0021] Thirdly, embodiments of this application provide a low beam lens module, which includes a low beam broadening lens module unit and a low beam elbow lens module unit. The low beam broadening lens module unit is used to form a low beam broadening beam pattern, and the low beam broadening lens module unit is any of the aforementioned low beam broadening lens modules.

[0022] The low beam elbow lens module unit is used to form the 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 the low beam beam pattern.

[0023] Fourthly, embodiments of this application provide a lighting module, including a light source module and a low beam lens module. The light source module includes multiple light sources, and the low beam lens module is the aforementioned low beam lens module.

[0024] The near-light broadening focal line lens provided in this application embodiment is an integrally formed structure, including a first curved surface, a first total reflection surface, and a second total reflection surface. The first and second total reflection surfaces are arranged opposite each other along a first direction. The first curved surface is located on one side of the first total reflection surface along a second direction, and the first and second directions are perpendicular. A beam of parallel light is incident from the first curved surface, converged by the first curved surface, and then reflected sequentially by the first and second total reflection surfaces, converging along the first direction and parallel to a third direction, converging at the first focal line. The third direction is perpendicular to the first direction and parallel to the second total reflection surface. The directions are perpendicular. The first direction, the second direction, and the third direction form a three-dimensional coordinate system. The first focal line is located on the side of the second total internal reflection surface away from the first curved surface along the second direction. The first focal line extends along the third direction. Thus, the first curved surface is mainly used to focus the parallel light incident from the first curved surface along the first direction (i.e., longitudinal direction). The first and second total internal reflection surfaces are used to match the first curved surface and also play the role of partially focusing and folding the light path. Therefore, the parallel light incident from the first curved surface along the first direction (i.e., longitudinal direction) is focused into the first focal line extending along the third direction (lateral direction).

[0025] The near-light broadening focal length lens provided in this application has the following technical effects:

[0026] First, by using an integrally formed focal line lens structure, longitudinal focusing can be achieved as a single focal line, while lateral focusing can be achieved separately through a near-light broadening total internal reflection lens structure. This achieves separation of longitudinal and lateral focusing, with the longitudinal focusing being greater than the lateral focal length. This facilitates the realization of a near-light broadening beam pattern that is wider laterally and narrower longitudinally. It also helps to narrow the opening size of the first curved surface, which serves as the light-emitting surface, along the first direction (i.e., longitudinal). For example, the size of the first curved surface along the first direction (i.e., longitudinal) can be about 10mm.

[0027] Secondly, the integrally formed focal line lens is a single-layer lens structure, which is equivalent to combining the outer lens and inner lens in the traditional solution into one, effectively reducing Fresnel loss. Moreover, by utilizing total internal reflection, the optical path can be folded and the size shortened. While improving light efficiency, the size and weight of the lens are reduced, which is beneficial for energy saving and cost reduction.

[0028] Third, the one-piece focal line lens has a single-layer lens structure, which has less refraction, resulting in less dispersion of the projected light and better color uniformity.

[0029] Fourth, the first curved surface can be a complete freeform surface, and the first total reflection surface can be a complete freeform surface or a plane, which makes the static appearance of the lens consistent and is conducive to meeting different shape requirements such as horizontal strip module shape.

[0030] Fifth, the one-piece molded focal length lens can also avoid the problem of multi-layered lenses being burned due to focusing sunlight. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 is a side view schematic diagram of a near-light broadening focal line lens provided in an embodiment of this application.

[0033] Figure 2 is another side view of a near-light broadening focal length lens provided in an embodiment of this application.

[0034] Figure 3 is a bottom-view schematic diagram of the near-light broadening focal length lens shown in Figure 1.

[0035] Figure 4 is a side view of a near-beam widening lens module provided in an embodiment of this application.

[0036] Figure 5 is a top-down view of the near-beam widening lens module shown in Figure 4.

[0037] Figure 6 is a side view schematic diagram of the main ray tracing of a near-beam widening lens module provided in an embodiment of this application.

[0038] Figure 7 is a side view schematic diagram of ray tracing near the cutoff line of a near-beam widening lens module provided in an embodiment of this application.

[0039] Figure 8 is a top view schematic diagram of the ray tracing of a near-beam widening lens module provided in an embodiment of this application.

[0040] Reference numerals: 100 - First curved surface; 200 - First total reflection surface; 312 - Second total reflection surface; Z - First direction; X - Second direction; Y - Third direction; 101 - First edge; 102 - Second edge; S1 - First connecting surface; S2 - Second connecting surface; 413 - First light-incident surface; 414 - First reflective bowl surface; 500 - Light source; 602 - Edge. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0042] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0043] Secondly, this application provides a detailed description in conjunction with schematic diagrams. For ease of explanation, the accompanying drawings illustrating the optical structures may be partially enlarged, not to scale, and these schematic diagrams are merely examples and should not limit the scope of protection of this application. Furthermore, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0044] As described in the background section, existing low beam illumination lens modules have the following disadvantages:

[0045] First, since a single-layer single-focal lens has the same focusing degree in both the horizontal and vertical directions, it has poor controllability for near light that is flat vertically and wide horizontally (i.e., wide horizontally and narrow vertically).

[0046] Secondly, single-layer single-focus lenses are limited by aperture size and volume and weight. Once the horizontal aperture is long, the lens thickness will increase accordingly, and the lens weight will also increase. This is not conducive to the lightweighting of the lens module, nor to energy saving and cost saving. It is also not conducive to forming a horizontally elongated module shape, which has become one of the industry development trends.

[0047] Third, a single-layer multifocal lens is made up of multiple single-layer single-focal lenses, resulting in a poor overall static appearance of the lens.

[0048] Fourth, in existing low beam illumination lens modules, the inner and outer lenses are separate. The light emitted by the light source needs to pass through different media such as the inner lens, air, and outer lens, resulting in significant Fresnel loss and severe dispersion.

[0049] In view of this, the present application provides a near-beam broadening focal line lens. Figures 1 and 2 show side view schematic diagrams of the near-beam broadening focal line lens provided in the present application. As shown in Figures 1 and 2, the near-beam broadening focal line lens is an integrally formed structure. The near-beam broadening focal line lens includes a first curved surface 100, a first total reflection surface 200, and a second total reflection surface 312. The first total reflection surface 200 and the second total reflection surface 312 are arranged opposite to each other along the first direction Z. The first curved surface 100 is located on one side of the first total reflection surface 200 along the second direction X.

[0050] The first direction Z is perpendicular to the second direction X, and the third direction Y is perpendicular to both the first direction Z and the second direction X. The first direction Z, the second direction X, and the third direction Y form a three-dimensional coordinate system. The plane formed by the second direction X and the third direction Y is a horizontal plane. The first direction Z is the longitudinal direction, which is the narrow longitudinal direction of the near-beam broadening beam pattern projected by the near-beam broadening focal line lens. The third direction Y is the lateral direction of the wide near-beam broadening beam pattern projected by the near-beam broadening focal line lens.

[0051] Figure 3 shows a bottom view of the near-light broadening focal line lens shown in Figure 1. As shown in Figures 1 to 3, a beam of parallel light is incident from the first curved surface 100, converges after passing through the first curved surface 100, and is then reflected sequentially by the first total reflection surface 200 and the second total reflection surface 312, converging at the first focal line FF. The first focal line FF is located on the side of the second total reflection surface 312 opposite to the first curved surface 100 along the second direction X, and the first focal line FF extends along the third direction Y.

[0052] The first curved surface 100 is mainly used to focus the parallel light incident from the first curved surface 100 along the first direction Z (i.e., longitudinal direction); the first total internal reflection surface 200 and the second total internal reflection surface 312 are used to match the first curved surface 100, and also play a role in partial focusing and folding the optical path. In other words, the near-light broadening focal length lens mainly achieves longitudinal focusing of the parallel light incident from the first curved surface 100.

[0053] Optionally, the first surface 100 can be a convex surface along the first direction Z (i.e., longitudinal direction) to facilitate focusing of parallel light incident from the first surface 100 along the first direction Z (i.e., longitudinal direction).

[0054] Optionally, the first total reflection surface 200 can be a curved surface or a plane.

[0055] Optionally, the second total reflection surface 312 can be a curved surface or a plane.

[0056] This application does not limit the shape of the first curved surface 100, the first total reflection surface 200, and the second total reflection surface 312; the specific shape depends on the circumstances.

[0057] In practical applications, the first curved surface 100 is the light-emitting surface, which is the outermost transparent shaped surface of the near-light broadening focal line lens. As shown in Figure 4, the light emitted from the external light source 500 first passes through the near-light broadening total internal reflection lens unit Flat1, and then enters the near-light broadening focal line lens unit Flat2. Therefore, focusing along the third direction Y (i.e., the horizontal direction) can be achieved separately through the near-light broadening total internal reflection lens structure, thus achieving horizontal and vertical focusing separation, and the vertical focal length is greater than the horizontal focal length.

[0058] Therefore, the near-light broadening focal length lens provided in this application embodiment has the following technical effects:

[0059] First, by using an integrally formed focal line lens structure, longitudinal focusing is achieved as a single focal line, while lateral focusing can be achieved separately through a near-light broadening total internal reflection lens structure. This achieves separation of longitudinal and lateral focusing, with the longitudinal focusing being greater than the lateral focal length. This facilitates the realization of a near-light broadening beam pattern that is wider laterally and narrower longitudinally. It also helps to narrow the opening size of the first curved surface 100, which serves as the light-emitting surface, along the first direction Z (i.e., longitudinal direction). For example, the size of the first curved surface 100 along the first direction Z (i.e., longitudinal direction) can be about 10mm.

[0060] Secondly, the integrally formed focal line lens is a single-layer lens structure, which is equivalent to combining the outer lens and inner lens in the traditional solution into one, effectively reducing Fresnel loss. Moreover, by utilizing total internal reflection, the optical path can be folded and the size shortened. While improving light efficiency, the size and weight of the lens are reduced, which is beneficial for energy saving and cost reduction.

[0061] Third, the one-piece focal line lens has a single-layer lens structure, which has less refraction, resulting in less dispersion of the projected light and better color uniformity.

[0062] Fourth, the first curved surface 100 can be a complete free-form surface, and the first total reflection surface 200 can be a complete free-form surface or a plane, which makes the static appearance of the lens consistent and is conducive to meeting different shape requirements such as horizontal strip module shape.

[0063] Fifth, the one-piece molded focal length lens can also avoid the problem of multi-layered lenses being burned due to focusing sunlight.

[0064] Optionally, as shown in Figures 1 and 2, the first curved surface 100 has a first side 101 and a second side 102 arranged opposite to each other along a first direction Z. The first side 101 of the first curved surface 100 is connected to the first total reflection surface 200 through a first connecting surface S1, which extends along a second direction X. The second side 102 of the first curved surface 100 is connected to the second total reflection surface 312 through a second connecting surface S2, which also extends along a second direction X. In other words, the first curved surface 100 is connected to the first total reflection surface 200 and the second total reflection surface 312 respectively through a thick-walled structure between the first connecting surface S1 and the second connecting surface S2. This arrangement is more conducive to forming a horizontally wide and vertically narrow near-beam broadening beam pattern, and the fact that the first curved surface 100 extends along the second direction X allows for greater freedom in the design of the near-beam broadening focal line lens.

[0065] It is understandable that the lengths of the first connecting surface S1 and the second connecting surface S2 extending along the second direction X can be set according to requirements.

[0066] Alternatively, the first side 101 of the first curved surface 100 can be directly connected to the first total reflection surface 200, and the second side 102 of the first curved surface 100 can be directly connected to the second total reflection surface 312. This arrangement can shorten the path of the light beam in the lens and further improve the light efficiency.

[0067] Based on the fact that the first side 101 of the first curved surface 100 is connected to the first total internal reflection surface 200 through the first connecting surface S1, and the second side 102 of the first curved surface 100 is connected to the second total internal reflection surface 312 through the second connecting surface S2, optionally, as shown in Figure 1, the near-beam widening focal length lens has a Z-shaped structure. Alternatively, as shown in Figure 2, the near-beam widening focal length lens has an inverted Z-shaped structure. Regardless of whether the near-beam widening focal length lens has a Z-shaped structure or an inverted Z-shaped structure, the near-beam widening focal length lens can effectively reduce Fresnel loss, and by utilizing total internal reflection, folding the optical path, and shortening the size, it can reduce the volume and weight of the lens while improving the light efficiency, which is beneficial for energy saving and cost reduction.

[0068] As previously known, the first curved surface 100 is the light-emitting surface. Parallel light incident from the first curved surface 100 is first reflected by the first total internal reflection surface 200, then by the second total internal reflection surface 312, and finally converges at the first focal line FF. Therefore, the first total internal reflection surface 200 can also be the outer surface of a near-light broadening focal line lens. The first curved surface 100 can be a complete freeform surface, and the first total internal reflection surface 200 can be a complete freeform surface or a plane, thus allowing for more freedom in the design of the lens's outer surface, good consistency in static appearance, and the ability to meet different styling requirements.

[0069] Alternatively, the near-beam broadening focal line lens can be a transparent optical element made of PMMA (polymethyl methacrylate) or PC (polycarbonate).

[0070] Based on the same inventive concept, this application also provides a near-beam broadening lens module. Figure 4 shows a side view of a near-beam broadening lens module provided in this application embodiment, and Figure 5 shows a top-view oblique view of the near-beam broadening lens module shown in Figure 4. As shown in Figures 4 and 5, the near-beam broadening lens module includes a near-beam broadening total internal reflection (TIR) ​​lens unit Flat1 and a near-beam broadening focal line lens unit Flat2.

[0071] As shown in Figures 4 and 5, the near-beam broadening total internal reflection lens unit Flat1 includes a first light-incident surface 413 and a first reflective bowl surface 414. The first light-incident surface 413 is the surface of the near-beam broadening total internal reflection lens unit Flat1 that is away from the near-beam broadening focal line lens unit Flat2. The first reflective bowl surface 414 is deflected toward the near-beam broadening focal line lens unit Flat2 relative to the first light-incident surface 413.

[0072] As shown in Figures 4 and 5, the near-beam broadening focal line lens unit Flat2 is the near-beam broadening focal line lens provided in any of the aforementioned embodiments, and the first focal line FF is located on the edge 602 of the first reflective bowl surface 414 near the first light-incident surface 413.

[0073] Referring to Figures 4 and 5, the light emitted by the external light source 500 is incident through the first light-incident surface 413, converges through the first light-incident surface 413 to the first reflective surface 414, is reflected by the first reflective surface 414, and then is reflected by the second total reflection surface 312 and the first total reflection surface 200 in sequence, and finally exits through the first curved surface 100. The shape of the first reflective surface 414 is projected as a near-beam broadening light pattern, and the edge 602 of the first reflective surface 414 near the first light-incident surface 413 is projected as the cutoff line of the near-beam broadening light pattern.

[0074] Among them, the first light-incident surface 413 mainly plays the role of collecting and focusing light; the first reflective bowl surface 414 is a total internal reflection freeform surface, which mainly plays the role of collecting and focusing light and forming a near-beam broadening light pattern.

[0075] As previously known, the Flat2 near-beam broadening focal length lens unit is mainly used to achieve longitudinal focusing, while the Flat1 near-beam broadening total internal reflection lens unit is mainly used to achieve lateral focusing. This achieves separation of longitudinal and lateral focusing, and the longitudinal focusing is greater than the lateral focal length, which facilitates the realization of a near-beam broadening beam pattern that is wide laterally and narrow longitudinally.

[0076] Optionally, as shown in Figures 4 and 5, the near-light broadening total internal reflection lens unit Flat1 and the near-light broadening focal line lens unit Flat2 are integrally formed. In this way, the near-light broadening total internal reflection lens unit Flat1 and the near-light broadening focal line lens unit Flat2 are combined into an integral lens, which can further shorten the dimension chain and further reduce Fresnel loss, thereby improving optical efficiency.

[0077] Specifically, as shown in Figures 4 and 5, the first total reflection surface 200 and the first reflection bowl surface 414 can be directly connected or connected through a connecting surface, and the second total reflection surface 312 and the first light-incident surface 413 can be connected through a connecting surface. In this way, the light emitted by the external light source 500 is incident on the first light-incident surface 413, and then transmitted inside the integrally formed lens. After being reflected by the first reflection bowl surface 414, the second total reflection surface 312, and the first total reflection surface 200 in sequence, the light is finally emitted from the first curved surface 100. The optical path is short, the Fresnel loss is small, and the optical efficiency is high.

[0078] Alternatively, the near beam broadening total internal reflection lens unit Flat1 and the near beam broadening focal line lens unit Flat2 can also be separate structures, depending on the specific circumstances.

[0079] It should be noted that in the near beam widening lens module provided in this application embodiment, the near beam widening focal line lens unit Flat2 can be a Z-shaped structure or an inverted Z-shaped structure. The near beam widening lens module shown in Figure 4 is illustrated with the near beam widening focal line lens unit Flat2 having a Z-shaped structure as an example. The near beam widening lens module including the near beam widening focal line lens unit Flat2 with an inverted Z-shaped structure can be adaptively adjusted, which will not be described in detail here.

[0080] To better understand this application, Figure 6 shows a side view schematic diagram of the main ray tracing of a near-beam broadening lens module provided in an embodiment of this application; Figure 7 shows a side view schematic diagram of the ray tracing near the cutoff line of a near-beam broadening lens module provided in an embodiment of this application; and Figure 8 shows a top view schematic diagram of the ray tracing of a near-beam broadening lens module provided in an embodiment of this application. It can be seen that the light emitted from the external light source 500 is incident through the first light-incident surface 413, converges to the first reflective surface 414, is reflected by the first reflective surface 414, and then sequentially reflected by the second total reflection surface 312 and the first total reflection surface 200, finally exiting through the first curved surface 100 to form a near-beam broadening light pattern.

[0081] Optionally, as shown in Figure 5, in the near beam widening lens module, there are two near beam widening total internal reflection lens units Flat1. These two near beam widening total internal reflection lens units Flat1 are arranged side by side along the third direction Y, and these two near beam widening total internal reflection lens units Flat1 are arranged symmetrically along the second direction X. These two near beam widening total internal reflection lens units Flat1 correspond to the same near beam widening focal line lens unit Flat2. That is, these two near beam widening total internal reflection lens units Flat1 correspond to the same second total reflection surface 312, the first total reflection surface 200, and the first curved surface 100. In other words, the light emitted by the external light source 500 passes through its respective corresponding total internal reflection lens unit Flat1, and then is reflected by the same second total reflection surface 312 and the same first total reflection surface 200, and is uniformly emitted from the first curved surface 100.

[0082] With this configuration, as shown in Figure 8, the light rays emitted from the two near-beam widening total internal reflection lens units Flat1 are distributed in a cross-sectional manner along the third direction Y. That is, along the third direction Y, the light rays emitted from the left-hand near-beam widening total internal reflection lens unit Flat1 are distributed in the right half, and the light rays emitted from the right-hand near-beam widening total internal reflection lens unit Flat1 are distributed in the left half, which is beneficial for expanding the emitted light pattern along the third direction Y (i.e., laterally).

[0083] It should be noted that the two near-beam widening total internal reflection lens units Flat1 can be integrally molded, and both of these near-beam widening total internal reflection lens units Flat1 can also be integrally molded with the near-beam widening focal line lens unit Flat2.

[0084] Alternatively, in the low beam broadening lens module, the low beam broadening total internal reflection lens unit Flat1 can also be a single unit. By adjusting the shape of the first reflective bowl 414, the emitted low beam broadening pattern can also be achieved.

[0085] Accordingly, this application provides a low beam lens module, which includes a low beam broadening lens module unit and a low beam elbow lens module unit; wherein, the low beam broadening lens module unit is used to form a low beam broadening beam pattern, the low beam elbow lens module unit is used to form a low beam elbow cutoff line beam pattern, and the low beam elbow cutoff line beam pattern and the low beam broadening beam pattern are combined to form a low beam beam pattern.

[0086] The low beam widening lens module unit is the low beam widening lens module provided in any of the above embodiments. Since the low beam widening lens module has been described in detail in the foregoing embodiments, it will not be repeated here.

[0087] Accordingly, this application also provides an illumination module, which includes a light source module and a low beam lens module. The light source module includes multiple light sources 500, and the low beam lens module is the low beam lens module provided in the above embodiment. The light sources 500 are disposed on the light-incident surface of the low beam lens module, such as the first light-incident surface 413, so that the light emitted by the light sources 500 exits with a complete low beam pattern after passing through the low beam lens module. Specifically, the light emitted by the light sources 500 exits with a broadened low beam pattern after passing through the low beam broadening lens module unit in the low beam lens module.

[0088] Since the near beam widening lens module has been described in detail in the aforementioned embodiments, it will not be repeated here.

[0089] The various parts of this manual are described in a combination of parallel and progressive methods. Each part focuses on the differences between the other parts, and the same or similar parts can be referred to each other.

[0090] The features described above regarding the disclosed embodiments can be substituted or combined with each other to enable those skilled in the art to implement or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A near-light broadening focal length lens, characterized in that, The near-light broadening focal-line lens is a one-piece molded structure, comprising a first curved surface, a first total reflection surface, and a second total reflection surface. The first and second total reflection surfaces are arranged opposite to each other along a first direction. The first curved surface is located on one side of the first total reflection surface along a second direction, and the first and second directions are perpendicular. The near-light broadening focal line lens is configured such that a beam of parallel light is incident from the first curved surface, converges after passing through the first curved surface, and is then reflected sequentially by the first total reflection surface and the second total reflection surface, converging along the first direction and parallel to a third direction, converging at the first focal line. The third direction is perpendicular to the first direction and perpendicular to the second direction. The first focal line is located on the side of the second total reflection surface away from the first curved surface along the second direction, and the first focal line extends along the third direction.

2. The near-light broadening focal length lens according to claim 1, characterized in that, The first curved surface has a first side and a second side that are arranged opposite to each other along the first direction; The first edge of the first curved surface is connected to the first total reflection surface through a first connecting surface, and the first connecting surface extends along the second direction; The second side of the first curved surface is connected to the second total reflection surface through a second connecting surface, and the second connecting surface extends along the second direction.

3. The near-light broadening focal length lens according to claim 1 or 2, characterized in that, The near-light broadening focal length lens has a Z-shaped structure.

4. The near-light broadening focal length lens according to claim 1 or 2, characterized in that, The near-light broadening focal line lens has an inverted Z-shaped structure.

5. The near-light broadening focal length lens according to claim 1, characterized in that, The first curved surface has a first side and a second side arranged opposite to each other along the first direction. The first side is directly connected to the first total reflection surface, and the second side is directly connected to the second total reflection surface.

6. The near-light broadening focal length lens according to any one of claims 1-5, characterized in that, The first surface is a complete freeform surface.

7. The near-light broadening focal-line lens according to any one of claims 1-6, characterized in that, The first curved surface is a convex surface along the first direction.

8. The near-light broadening focal length lens according to any one of claims 1-7, characterized in that, The first total reflection surface is a complete freeform surface or plane.

9. The near-light broadening focal length lens according to any one of claims 1-8, characterized in that, The second total reflection surface is a curved surface or a plane.

10. A near-beam widening lens module, characterized in that, The near-light broadening lens module includes a near-light broadening total internal reflection lens unit and a near-light broadening focal line lens unit. The near-beam broadening total internal reflection lens unit includes a first light-incident surface and a first reflective cup surface. The first light-incident surface is the surface of the near-beam broadening total internal reflection lens unit that is away from the near-beam broadening focal line lens unit. The first reflective cup surface is deflected relative to the first light-incident surface of the near-beam broadening focal line lens unit. The near-beam broadening focal line lens unit is the near-beam broadening focal line lens according to any one of claims 1-9, wherein the first focal line is located on the edge of the first reflective bowl surface near the first incident light surface, and wherein the near-beam broadening lens module is configured as follows: The light emitted from the external light source is incident on the first light-incident surface, converges to the first reflective bowl surface, is reflected by the first reflective bowl surface, and then is reflected by the second total reflection surface and the first total reflection surface in sequence, and finally exits from the first curved surface. The shape of the first reflective bowl surface is projected as a near-beam broadening light pattern, and the edge of the first reflective bowl surface near the first light-incident surface is projected as the cutoff line of the near-beam broadening light pattern.

11. The near-beam widening lens module according to claim 10, characterized in that, The near-light broadening total internal reflection lens unit and the near-light broadening focal line lens unit are integrally formed.

12. The near-beam widening lens module according to claim 10, characterized in that, The near-light broadening total internal reflection lens unit and the near-light broadening focal line lens unit are separate structures.

13. The near-beam broadening lens module according to any one of claims 10 to 12, characterized in that, There are two near beam widening total internal reflection lens units. The two near beam widening total internal reflection lens units are arranged side by side adjacent to each other along the third direction, and the two near beam widening total internal reflection lens units are arranged symmetrically along the second direction. The two near-beam broadening total internal reflection lens units correspond to the same near-beam broadening focal line lens unit.

14. A low-beam lens module, characterized in that, The low beam lens module includes a low beam widening lens module unit and a low beam elbow lens module unit; The near beam broadening lens module unit is used to form a near beam broadening beam pattern, and the near beam broadening lens module unit is the near beam broadening lens module according to any one of claims 10-13; The near beam elbow lens module unit is used to form a near beam elbow cutoff line pattern, and the near beam elbow cutoff line pattern and the near beam broadening pattern are combined to form a near beam pattern.

15. A lighting module, characterized in that, It includes a light source module and a low beam lens module. The light source module includes multiple light sources, and the low beam lens module is the low beam lens module as described in claim 14.

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