Low-beam elbow-shaped focusing lens, related lens module, and illumination module
By using an integrated elbow-shaped focusing lens structure for near beam, horizontal and vertical focusing separation is achieved. By utilizing total internal reflection and folding the optical path, the problems of light shape controllability, weight, and Fresnel loss in existing lens modules are solved, realizing a high-efficiency, energy-saving, and versatile near beam lens module design.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- MIND ELECTRONICS APPLIANCE CO LTD
- Filing Date
- 2025-11-24
- Publication Date
- 2026-06-04
AI Technical Summary
Existing low beam illumination lens modules have the same degree of focusing in both the horizontal and vertical directions, resulting in poor controllability of light shape, increased lens thickness and weight, which is not conducive to lightweighting and energy saving. Furthermore, they suffer from severe Fresnel loss and severe dispersion, making it impossible to meet the design requirements of horizontally elongated modules.
It adopts a one-piece molded elbow focusing lens for near light, and achieves horizontal and vertical focusing separation through the first curved surface and two total reflection surfaces. It utilizes total reflection to fold the optical path, reducing Fresnel loss. It adopts a single-layer lens structure and combines freeform surface design to improve light efficiency and color uniformity.
It achieves a near-beam elbow cutoff line beam pattern that is wide laterally and narrow vertically, reducing lens size and weight, lowering costs, avoiding the burning problem of multi-layer lenses, improving light efficiency and color uniformity, and meeting different design requirements.
Smart Images
Figure CN2025137202_04062026_PF_FP_ABST
Abstract
Description
Low beam elbow focusing lens and related lens module and lighting module TECHNICAL FIELD
[0001] The present disclosure relates to the technical field of vehicle lamps, in particular to a low beam elbow focusing lens and related lens module and lighting module.
[0002] BACKGROUND
[0003] The existing low beam lighting lens module generally includes two or more layers of inner and outer lenses, wherein the outer lens is mostly a single layer single focusing lens or a single layer multi-focusing lens composed of multiple single layer single focusing lenses. The existing low beam lighting lens module has the following disadvantages:
[0004] Since the focusing degree of the single layer single focusing lens is the same in the horizontal and vertical directions, the controllability of the low beam light shape is poor for the low beam light shape that is flat up and down and wide left and right. The single layer single focusing lens is limited by the opening size and volume weight. Once the horizontal opening is long, the lens thickness will increase, and the lens weight will also increase, which is not conducive to the lightweight of the lens module, energy saving and cost saving, and the formation of a horizontal long strip module shape, which has become one of the industry development trends. The single layer multi-focusing lens is composed of multiple single layer single focusing lenses, resulting in poor overall static appearance of the lens. In the existing low beam lighting lens module, the inner lens and the outer lens are separated, and the light emitted by the light source needs to pass through different media such as the inner lens, air, and the outer lens, resulting in large Fresnel loss and serious chromatic dispersion. SUMMARY
[0005] To solve the above technical problems, the present disclosure provides a low beam elbow focusing lens and related lens module and lighting module to realize horizontal and vertical focusing separation by an integrally formed focusing lens structure, and the vertical focal length is greater than the horizontal focal length, which is convenient for realizing a low beam elbow cut-off line light shape that is wide horizontally and narrow vertically. In addition, the integrally formed focusing lens is a single layer lens structure to effectively reduce Fresnel loss, and by using total reflection, the optical path can be folded and the size can be shortened, which improves the light efficiency while reducing the volume and weight of the lens, is conducive to energy saving and cost saving, and has less refraction, so that the projected light shape has small chromatic dispersion and good color uniformity. In addition, the light emitting surface and the total reflection surface can be complete surfaces, the lens static appearance has good consistency, and different modeling requirements such as a horizontal long strip module shape can be met.
[0006] To achieve the above purpose, the present disclosure provides the following technical solutions:
[0007] The low-beam elbow focusing lens is an integral molding structure, and comprises a first curved surface, a first total reflection surface and a second total reflection surface, the first total reflection surface and the second total reflection surface are oppositely arranged 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 direction and the second direction are perpendicular to each other.
[0008] A bundle of parallel light is incident on the first curved surface, is converged by the first curved surface, and is reflected by the first total reflection surface and the second total reflection surface in sequence, and is focused on a first focal point, and the first focal point is located on a side of the second total reflection surface, away from the first curved surface, along the second direction.
[0009] The distance between the geometric center of the first curved surface and the first focal point along the second direction is greater than the distance between the geometric center of the second total reflection surface and the first focal point along the second direction.
[0010] Compared with the prior art, the above technical solution has the following advantages:
[0011] The low-beam elbow focusing lens provided by the embodiment of the present disclosure is an integral molding structure, and comprises a first curved surface, a first total reflection surface and a second total reflection surface, the first total reflection surface and the second total reflection surface are oppositely arranged 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 direction and the second direction are perpendicular to each other; a bundle of parallel light is incident on the first curved surface, is converged by the first curved surface, and is reflected by the first total reflection surface and the second total reflection surface in sequence, and is focused on a first focal point, and the first focal point is located on a side of the second total reflection surface, away from the first curved surface, along the second direction, so that the first curved surface is mainly used for focusing the parallel light incident on the first curved surface along a first direction (i.e. a longitudinal direction), the second total reflection surface is mainly used for focusing the light beam reflected by the first total reflection surface after the parallel light incident on the first curved surface along a third direction (i.e. a transverse direction), the third direction is perpendicular to the first direction and the second direction, and the first direction, the second direction and the third direction form a three-dimensional coordinate system, the first total reflection surface is mainly used for matching the first curved surface and the second total reflection surface, and also plays a part of focusing role, and the first total reflection surface and the second total reflection surface also play a role of folding the optical path; and the distance between the geometric center of the first curved surface and the first focal point along the second direction (i.e. a longitudinal focal length) is greater than the distance between the geometric center of the second total reflection surface and the first focal along the second direction (i.e. a transverse focal length).
[0012] Therefore, the low-beam elbow focusing lens provided by the embodiment of the present disclosure has the following technical effects:
[0013] By using a one-piece molded focusing lens structure, horizontal and vertical focusing separation is achieved, with the vertical focal length being greater than the horizontal focal length. This facilitates the creation of a near-light elbow-shaped cutoff line beam pattern that is wider horizontally and narrower vertically. 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., the vertical direction). For example, the size of the first curved surface along the first direction (i.e., the vertical direction) can be about 10mm. The one-piece molded focusing lens is a single-layer lens structure, which is equivalent to combining the outer and inner lenses in the traditional solution into one, effectively reducing Fresnel loss. Furthermore, by utilizing total internal reflection, the light path can be folded, shortening the size. This improves light efficiency while reducing the size and weight of the lens, which is beneficial for energy saving and cost reduction. The one-piece molded focusing lens is a single-layer lens structure with less refraction, resulting in low dispersion and good color uniformity of the projected light pattern. The first curved surface can be a complete freeform surface, and the first total internal reflection surface can be a complete freeform surface or a plane, ensuring good consistency in the static appearance of the lens and facilitating different design requirements such as horizontally elongated module shapes. The one-piece molded focusing lens also avoids the problem of multi-layer lenses being burned by focusing sunlight.
[0014] Brief description of the attached figures
[0015] To more clearly illustrate the technical solutions in the embodiments of this disclosure 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 disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 is a side view schematic diagram of a near-light elbow focusing lens provided in an embodiment of this disclosure;
[0017] Figure 2 is a side view schematic diagram of another near-light elbow focusing lens provided in the embodiments of this disclosure;
[0018] Figure 3 is a schematic diagram of the near-light elbow focusing lens shown in Figure 1 from a low angle.
[0019] Figure 4 is a side view schematic diagram of a near-beam elbow lens module provided in an embodiment of this disclosure;
[0020] Figure 5 is a top-view schematic diagram of the near-beam elbow lens module shown in Figure 4;
[0021] Figure 6 is a top view of a low beam lens module provided in an embodiment of this disclosure;
[0022] Figure 7 is a bottom view of a low beam lens module provided in an embodiment of this disclosure;
[0023] Figure 8 is a side view of a low beam widening lens module unit in the low beam lens module provided in the embodiments of this disclosure;
[0024] Fig. 9 is a schematic oblique view of the low-beam spread lens module unit shown in Fig. 8;
[0025] Fig. 10 is a schematic side view of a low-beam spread focal line lens unit in a low-beam lens module according to an embodiment of the present disclosure;
[0026] Fig. 11 is a schematic side view of another low-beam spread focal line lens unit in a low-beam lens module according to an embodiment of the present disclosure;
[0027] Fig. 12 is a schematic bottom view of the low-beam spread focal line lens unit shown in Fig. 10;
[0028] Fig. 13a is a schematic top view of a low-beam spread focal line lens unit and a low-beam elbow focusing lens unit integrally formed in a low-beam lens module according to an embodiment of the present disclosure;
[0029] Fig. 13b is a schematic bottom view of a low-beam spread focal line lens unit and a low-beam elbow focusing lens unit integrally formed in a low-beam lens module according to an embodiment of the present disclosure;
[0030] Fig. 14 is a schematic side view of a main light ray tracing of a low-beam lens module according to an embodiment of the present disclosure;
[0031] Fig. 15 is a schematic side view of a light ray tracing near a cutoff line of a low-beam lens module according to an embodiment of the present disclosure;
[0032] Fig. 16 is a schematic top view of a light ray tracing near a low-beam spread cutoff line of a low-beam lens module according to an embodiment of the present disclosure;
[0033] Fig. 17 is a schematic top view of a light ray tracing near an elbow cutoff line of a low-beam lens module according to an embodiment of the present disclosure.
[0034] Fig. 17 is a schematic top view of a light ray tracing near an elbow cutoff of a low-beam lens module according to an embodiment of the present disclosure.
[0035] Embodiments of the present application
[0036] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present disclosure.
[0037] In the following description, many specific details are set forth in order to provide a thorough understanding of the present disclosure. However, the present disclosure can be practiced without the specific details that are set forth in the description, and it is understood that persons having ordinary skill in the art can make and use other embodiments of the present disclosure without departing from the scope of the present disclosure. Therefore, the present disclosure is not limited to the specific embodiments disclosed below.
[0038] Secondly, the present disclosure is described in detail in combination with the schematic diagram. In the detailed description of the embodiments of the present disclosure, the drawings of the optical structure are partially enlarged without the general proportion for the convenience of description, and the schematic diagram is only an example, which should not limit the scope of protection of the present disclosure herein. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in the actual manufacture.
[0039] As described in the background section, the existing low-beam illumination lens module has the following disadvantages:
[0040] Since the focusing degree of the single-layer single-focusing lens is the same in the lateral direction and the longitudinal direction, the controllability of the light shape of the low-beam which is wide in the lateral direction and narrow in the longitudinal direction (i.e., wide in the lateral direction and narrow in the longitudinal direction) is poor. The single-layer single-focusing lens is limited by the opening size and the volume and weight. Once the lateral opening is longer, the thickness of the lens will increase, and the weight of the lens will also increase, which is not conducive to the lightweight of the lens module, and is also not conducive to energy saving and cost saving, and is also not conducive to the formation of a long strip-shaped module shape in the lateral direction, which has become one of the industry development trends. The single-layer multi-focusing lens is spliced by multiple single-layer single-focusing lenses, resulting in poor overall static appearance of the lens. In the existing low-beam illumination lens module, the inner lens and the outer lens are separated, and the light emitted by the light source needs to pass through different media such as the inner lens, air, and the outer lens, resulting in large Fresnel loss and serious chromatic dispersion.
[0041] In view of this, the low-beam elbow focusing lens provided by the embodiments of the present disclosure is an integrally formed structure, and includes a first curved surface 100, a first total reflection surface 200, and a second total reflection surface 311. The first total reflection surface 200 and the second total reflection surface 311 are oppositely arranged along a first direction Z. The first curved surface 100 is located on one side of the first total reflection surface 200 along a second direction X. The first direction Z and the second direction X are perpendicular to each other. A third direction Y is perpendicular to the first direction Z and the second direction X, and the first direction Z, the second direction X, and the third direction Y form a three-dimensional coordinate system. The second direction X and the third direction Y form a horizontal plane, and the first direction Z is a longitudinal direction, i.e., the low-beam elbow cutoff line light pattern projected by the low-beam elbow focusing lens is longitudinally narrow. The third direction Y is a transverse direction, i.e., the low-beam elbow cutoff line light pattern projected by the low-beam elbow focusing lens is transversely wide.
[0042] As shown in FIGS. 1 and 2, a parallel light beam is incident on the first curved surface 100, is focused by the first curved surface 100, is reflected by the first total reflection surface 200 in sequence, is reflected by the second total reflection surface 311, and is focused at a first focal point F. The first focal point F is located on a side of the second total reflection surface 311 away from the first curved surface 100 along the second direction X.
[0043] The first curved surface 100 is mainly used for focusing the parallel light incident on the first curved surface 100 along the first direction Z (i.e., the longitudinal direction). The second total reflection surface 311 is mainly used for focusing the light beam reflected by the first total reflection surface 200 after the parallel light incident on the first curved surface 100 along the third direction Y (i.e., the transverse direction). The first total reflection surface 200 is mainly used for matching the first curved surface 100 and the second total reflection surface 311, and also plays a partial focusing role. The first total reflection surface 200 and the second total reflection surface 311 also play a role of folding the optical path.
[0044] Optionally, the first curved surface 100 can be a convex surface along the first direction Z (i.e., the longitudinal direction), so as to facilitate focusing the parallel light incident on the first curved surface 100 along the first direction Z (i.e., the longitudinal direction).
[0045] Optionally, the first total reflection surface 200 can be a curved surface or a flat surface.
[0046] Optionally, the second total reflection surface 311 can be a concave surface along the third direction Y (i.e., the transverse direction), so as to facilitate focusing the light beam reflected by the first total reflection surface 200 after the parallel light incident on the first curved surface 100 along the third direction Y (i.e., the transverse direction).
[0047] However, the shape of the first curved surface 100, the first total reflection surface 200, and the second total reflection surface 311 is not limited in the present disclosure, and is determined according to the specific situation.
[0048] In practical applications, the first curved surface 100 is an out-light surface, that is, the outermost transparent molding surface of the low-beam elbow focusing lens. The incident light is incident to the second total reflection surface 311, and is sequentially reflected by the second total reflection surface 311 and the first total reflection surface 200, and then is emitted from the first curved surface 100, forming a low-beam elbow cutoff line light pattern.
[0049] FIG. 3 shows a bottom view of the low-beam elbow focusing lens shown in FIG. 1. As shown in FIG. 3, the distance L between the geometric center of the first curved surface 100 and the first focal point F along the second direction X is greater than the distance l between the geometric center of the second total reflection surface 311 and the first focal point F along the second direction X, where the distance L between the geometric center of the first curved surface 100 and the first focal point F along the second direction X is the longitudinal focal length, and the distance l between the geometric center of the second total reflection surface 311 and the first focal point F along the second direction X is the transverse focal length, that is, the longitudinal focal length is greater than the transverse focal length.
[0050] Therefore, the low-beam elbow focusing lens provided by the embodiment of the present disclosure has the following technical effects:
[0051] The focusing lens structure formed in one piece realizes separation of longitudinal and transverse focusing, and the longitudinal focal length is greater than the transverse focal length, thereby facilitating realization of a low-beam elbow cutoff line light pattern with a wide transverse direction and a narrow longitudinal direction, and also being conducive to narrowing the opening size of the first curved surface 100 as the out-light surface along the first direction Z (that is, the longitudinal direction), for example, the size of the first curved surface 100 along the first direction Z (that is, the longitudinal direction) can be about 10 mm; the focusing lens formed in one piece is a single-layer lens structure, which is equivalent to combining the outer lens and the inner lens in the traditional scheme into one body, effectively reducing Fresnel loss, and using total reflection to fold the light path, shorten the size, improve the light efficiency while reducing the volume and weight of the lens, which is conducive to energy saving and cost saving; the focusing lens formed in one piece is a single-layer lens structure, and the refraction is small, thereby making the projected light pattern have small chromatic dispersion and good color uniformity; the first curved surface 100 can be a complete free curved surface, and the first total reflection surface 200 can be a complete free curved surface or a plane, so that the lens has good static appearance consistency, which is conducive to meeting different modeling requirements such as a transversely long strip-shaped module; the focusing lens formed in one piece can also avoid the problem of burns caused by focusing due to the entry of sunlight in the multi-layer lens.
[0052] Optionally, as shown in FIG. 1 and FIG. 2, the first curved surface 100 has a first edge 101 and a second edge 102 arranged oppositely along the first direction Z; the first edge 101 of the first curved surface 100 is connected with the first total reflection surface 200 through a first connecting surface S1, and the first connecting surface S1 extends along the second direction X; the second edge 102 of the first curved surface 100 is connected with the second total reflection surface 311 through a second connecting surface S2, and the second connecting surface S2 extends along the second direction X. That is, the first curved surface 100 is connected with the first total reflection surface 200 and the second total reflection surface 311 through the thick wall structure between the first connecting surface S1 and the second connecting surface S2, respectively. By such an arrangement, on the one hand, it is more conducive to forming a low beam elbow-shaped cutoff line light pattern which is wide in the transverse direction and narrow in the longitudinal direction, and on the other hand, the first curved surface 100 extends along the second direction X, so that the appearance design of the low beam elbow-shaped focusing lens is more free.
[0053] The length of the first connecting surface S1 and the second connecting surface S2 extending along the second direction X can be set according to requirements.
[0054] Alternatively, the first edge 101 of the first curved surface 100 can be directly connected with the first total reflection surface 200, and the second edge 102 of the first curved surface 100 can be directly connected with the second total reflection surface 311. By such an arrangement, the path of the light beam in the lens can be shortened, and the light efficiency can be further improved.
[0055] On the basis of the first edge 101 of the first curved surface 100 being connected with the first total reflection surface 200 through the first connecting surface S1, and the second edge 102 of the first curved surface 100 being connected with the second total reflection surface 311 through the second connecting surface S2, optionally, as shown in FIG. 1, the low beam elbow-shaped focusing lens has a Z-shaped structure; alternatively, as shown in FIG. 2, the low beam elbow-shaped focusing lens has an inverted Z-shaped structure. Whether the low beam elbow-shaped focusing lens has a Z-shaped structure or an inverted Z-shaped structure, the low beam elbow-shaped focusing lens can effectively reduce Fresnel loss, and utilize total reflection to fold the light path, thereby shortening the size, improving the light efficiency, reducing the volume and weight of the lens, and being conducive to energy saving and cost saving.
[0056] As known from the foregoing, the first curved surface 100 is an outcoupling surface; the parallel light incident from the first curved surface 100 is first reflected by the first total reflection surface 200, and then reflected by the second total reflection surface 311, and finally focused on the first focal point F. Therefore, the first total reflection surface 200 can also be an outer surface of the low beam elbow-shaped focusing lens; the first curved surface 100 can be a complete free curved surface, and the first total reflection surface 200 can be a complete free curved surface or a plane, thereby making the design of the outer surface of the lens more free, having good static appearance consistency, and being able to meet different modeling requirements.
[0057] Optionally, the low-beam elbow focusing lens can be a transparent optical element made of PMMA (polymethyl methacrylate) or PC (polycarbonate).
[0058] Based on the same inventive concept, the disclosure also provides a low-beam elbow lens module. FIG. 4 shows a side view of a low-beam elbow lens module according to an embodiment of the disclosure, and FIG. 5 shows a diagonal view of the low-beam elbow lens module shown in FIG. 4. As shown in FIGS. 4 and 5, the low-beam elbow lens module includes a low-beam elbow total internal reflection (TIR) lens unit Kink1 and a low-beam elbow focusing lens unit Kink2.
[0059] As shown in FIGS. 4 and 5, the low-beam elbow TIR lens unit Kink1 includes a first light-incident surface 411 and a first reflection bowl surface 412. The first light-incident surface 411 is a surface of the low-beam elbow TIR lens unit Kink1 facing away from the low-beam elbow focusing lens unit Kink2, and the first reflection bowl surface 412 is deflected toward the low-beam elbow focusing lens unit Kink2 relative to the first light-incident surface 411.
[0060] As shown in FIGS. 4 and 5, the low-beam elbow focusing lens unit Kink2 is the low-beam elbow focusing lens provided in any of the foregoing embodiments, and the first focal point F is located on an edge 601 of the first reflection bowl surface 412 close to the first light-incident surface 411.
[0061] As shown in FIGS. 4 and 5, light emitted by an external light source 500 is incident on the first light-incident surface 411, converges on the first reflection bowl surface 412 through the first light-incident surface 411, is reflected by the first reflection bowl surface 412, and is then sequentially reflected by the second TIR surface 311 and the first TIR surface 200, and finally emitted by the first curved surface 100. The shape of the first reflection bowl surface 412 is projected as a low-beam elbow cutoff line light pattern, and the edge 601 of the first reflection bowl surface 412 close to the first light-incident surface
[0062] Here, the first light-incident surface 411 mainly functions to collect and converge light, and the first reflection bowl surface 412 is a TIR free-form surface that mainly functions to collect and converge light and form a low-beam elbow cutoff line light pattern.
[0063] Optionally, as shown in FIGS. 4 and 5, the low-beam elbow TIR lens Kink1 and the low-beam elbow focusing lens Kink2 are integrally formed. In this way, the low-beam elbow TIR lens Kink1 and the low-beam elbow focusing Kink2 lens are combined into an integral lens, which can further shorten the size chain, further reduce Fresnel loss, and improve optical efficiency.
[0064] Specifically, as shown in FIG. 4 and FIG. 5, the first total reflection surface 200 and the first reflective bowl surface 412 can be directly connected or connected through an adapter surface, the second total reflection surface 311 and the first light entrance surface 411 can be connected through an adapter surface, in this way, the light emitted by the external light source 500 is incident by the first light entrance surface 411, then transmitted in the integrally formed lens, sequentially reflected by the first reflective bowl surface 412, the second total reflection surface 311 and the first total reflection surface 200, and finally emitted by the first curved surface 100, the optical path is short, the Fresnel loss is small, and the optical efficiency is high.
[0065] Alternatively, the low-beam elbow-shaped total internal reflection lens unit Kink1 and the low-beam elbow-shaped focusing lens unit Kink2 can also be a separate structure, which is determined according to the situation.
[0066] In the low-beam elbow-shaped lens module provided by the embodiments of the present disclosure, the low-beam elbow-shaped focusing lens unit Kink2 can be a Z-shaped structure or an inverted Z-shaped structure. The low-beam elbow-shaped lens module shown in FIG. 4 is an example of the low-beam elbow-shaped focusing lens unit Kink2 being a Z-shaped structure. The low-beam elbow-shaped lens module including the low-beam elbow-shaped focusing lens unit Kink2 in an inverted Z-shaped structure can be adaptively adjusted, and thus is not described in detail.
[0067] Correspondingly, the embodiments of the present disclosure also provide a low-beam lens module. FIG. 6 shows a top view of a low-beam lens module according to an embodiment of the present disclosure, and FIG. 7 shows a bottom view of the low-beam lens module according to an embodiment of the present disclosure. As shown in FIG. 6 and FIG. 7, the low-beam lens module includes a low-beam elbow-shaped lens module unit Kink and a low-beam widening lens module unit Flat. The low-beam elbow-shaped lens module unit Kink is configured to form a low-beam elbow-shaped cutoff line light pattern, and the low-beam widening lens module unit Flat is configured to form a low-beam widening light pattern. The low-beam elbow-shaped cutoff line light pattern and the low-beam widening light pattern combine to form a complete low-beam light pattern.
[0068] The low-beam elbow-shaped lens module unit Kink can be any of the low-beam elbow-shaped lens modules provided in the above embodiments. Since the low-beam elbow-shaped lens module provided by the embodiments of the present disclosure has been described in detail in the foregoing embodiments, it is not described in detail here.
[0069] Regarding the low-beam widening lens module unit, alternatively, FIG. 8 shows a side view of a low-beam widening lens module unit Flat, and FIG. 9 shows an oblique top view of the low-beam widening lens module unit Flat shown in FIG. 8. As shown in FIG. 6-FIG. 9, the low-beam widening lens module unit Flat includes a low-beam widening total internal reflection (TIR) lens unit Flat1 and a low-beam widening focal line lens unit Flat2.
[0070] As shown in FIGS. 4-9, the low-beam wide focal line lens unit Flat2 and the low-beam kink focusing lens unit Kink2 are integrally formed, the low-beam wide focal line lens unit Flat2 and the low-beam kink focusing lens unit Kink2 share the first curved surface 100 and the first total reflection surface 200, the low-beam wide focal line lens unit Flat2 further includes a third total reflection surface 312, the third total reflection surface 312 and the first total reflection surface 200 are oppositely arranged along the first direction Z, and the third total reflection surface 312 and the second total reflection surface 311 are arranged side by side along the third direction Y.
[0071] Optionally, the third total reflection surface 312 can be a curved surface or a flat surface.
[0072] FIGS. 10 and 11 respectively show side views of two low-beam wide focal line lens units Flat2, and FIG. 12 shows a bottom view of the low-beam wide focal line lens unit Flat2 shown in FIG. 10, as shown in FIGS. 10-12, a parallel light beam is incident from the first curved surface 100, is converged by the first curved surface 100, is reflected by the first total reflection surface 200 and the third total reflection surface 312 in turn, is converged along the first direction Z, and is parallel along the third direction Y, and is converged on the first focal line FF, the first focal line FF is located on the side of the third total reflection surface 312 away from the first curved surface 100 along the second direction X, and the first focal line FF extends along the third direction Y.
[0073] In order to better understand the present disclosure, FIG. 13a shows a top view of the integrally formed low-beam wide focal line lens unit Flat2 and the low-beam kink focusing lens unit Kink2, and FIG. 13b shows a bottom view of the integrally formed low-beam wide focal line lens unit Flat2 and the low-beam kink focusing lens unit Kink2, it can be seen that if a parallel light beam is incident from the first curved surface 100, is converged by the first curved surface 100, and is reflected by the first total reflection surface 200 and the second total reflection surface 311 in turn, it is converged into a first focal point F; if a parallel light beam is incident from the first curved surface 100, is converged by the first curved surface 100, and is reflected by the first total reflection surface 200 and the third total reflection surface 312 in turn, it is converged into a first focal line FF.
[0074] As known from the foregoing, the first edge 101 of the first curved surface 100 is connected with the first total reflection surface 200 through a first connecting surface S1, the first connecting surface S1 extending along the second direction X; the second edge 102 of the first curved surface 100 is connected with the second total reflection surface 311 through a second connecting surface S2, the second connecting surface S2 extending along the second direction X. On this basis, since the low beam widening focal line lens unit Flat2 and the low beam elbow focusing lens unit Kink2 are integrally formed, as shown in FIG. 10 and FIG. 11, the second edge 102 of the first curved surface 100 is also connected with the third total reflection surface 312 through the second connecting surface S2, which is also conducive to forming a low beam widening light pattern that is wide in the transverse direction and narrow in the longitudinal direction, and the lens appearance design is more free.
[0075] As known from the foregoing, the first edge 101 of the first curved surface 100 is connected with the first total reflection surface 200 through a first connecting surface S1, the first connecting surface S1 extending along the second direction X; the second edge 102 of the first curved surface 100 is connected with the second total reflection surface 311 through a second connecting surface S2, the second connecting surface S2 extending along the second direction X. On this basis, since the low beam widening focal line lens unit Flat2 and the low beam elbow focusing lens unit Kink2 are integrally formed, as shown in FIG. 10 and FIG. 11, the second edge 102 of the first curved surface 100 is also connected with the third total reflection surface 312 through the second connecting surface S2, which is also conducive to forming a low beam widening light pattern that is wide in the transverse direction and narrow in the longitudinal direction, and the lens appearance design is more free.
[0076] Since the low beam widening focal line lens unit Flat2 and the low beam elbow focusing lens unit Kink2 are integrally formed, as shown in FIG. 1 and FIG. 10, the low beam elbow focusing lens unit Kink2 is in a Z-shaped structure, and the low beam widening focal line lens unit Flat2 is also in a Z-shaped structure. As shown in FIG. 2 and FIG. 11, the low beam elbow focusing lens unit Kink2 is in an inverted Z-shaped structure, and the low beam widening focal line lens unit Flat2 is also in an inverted Z-shaped structure.
[0077] As shown in FIG. 6-FIG. 9, the low beam widening total internal reflection lens unit Flat1 includes a second light entrance surface 413 and a second reflection bowl surface 414. The second light entrance surface 413 is a surface of the low beam widening total internal reflection lens unit Flat1 facing away from the low beam widening focal line lens unit Flat2. The second reflection bowl surface 414 is deflected towards the low beam widening focal line lens unit Flat2 relative to the second light entrance surface 413. The first focal line FF is located on an edge 602 of the second reflection bowl surface 414 close to the second light entrance surface 413.
[0078] As shown in FIGS. 6-9, the light emitted by the external light source 500 is incident by the second light-incident surface 413, converges to the second reflective bowl surface 414 through the second light-incident surface 413, is reflected by the second reflective bowl surface 414, is sequentially reflected by the third total reflection surface 312 and the first total reflection surface 200, and is finally emitted by the first curved surface 100. The shape of the second reflective bowl surface 414 is projected as a near-light spread light type, and the edge of the second reflective bowl surface 414 close to the second light-incident surface 413 is projected as a cutoff line of the near-light spread light type.
[0079] Among them, the second light-incident surface 413 mainly plays a role of light collection and light convergence; the second reflective bowl surface 414 is a total reflection free curved surface, and mainly plays a role of light collection, light convergence, and formation of a near-light spread light type.
[0080] For the near-light spread lens module unit Flat, the first curved surface 100 is mainly used for focusing the parallel light incident from the first curved surface 100 along the first direction Z (i.e., the longitudinal direction); the first total reflection surface 200 and the third total reflection surface 312 are used for matching the first curved surface 100, and also play a role of partial focusing and folding of the light path; that is, the near-light spread focal line lens unit Flat2 mainly realizes longitudinal focusing of the parallel light incident from the first curved surface 100, and the near-light spread total internal reflection lens unit Flat1 is mainly used for lateral focusing, so as to realize separation of lateral and longitudinal focusing, and the longitudinal focal length is greater than the lateral focal length, which is convenient for realizing the near-light spread light type of lateral width and longitudinal narrowness, and is also beneficial to narrowing the opening size of the first curved surface 100 along the first direction Z (i.e., the longitudinal direction) as the light-emitting surface. For example, the size of the first curved surface 100 along the first direction Z (i.e., the longitudinal direction) can be about 10 mm.
[0081] In addition, the near-light spread focal line lens unit Flat2 and the near-light elbow focusing lens unit Kink2 share the first curved surface 100 and the first total reflection surface 200. The first curved surface 100 can be a complete free curved surface, and the first total reflection surface 200 can be a complete free curved surface or a plane, so that the lens static appearance has good consistency, which is beneficial to meet different modeling requirements such as a lateral long strip-shaped module.
[0082] As shown in FIG. 6 and FIG. 7, the number of combinations of the low-beam elbow-shaped lens module unit Kink and the low-beam flat lens module unit Flat in the low-beam lens module is not limited, that is, the number of the low-beam elbow-shaped lens module unit Kink and the number of the low-beam flat lens module unit Flat in the low-beam lens module are set according to requirements.
[0083] As shown in FIG. 6 and FIG. 7, similar to the low-beam elbow-shaped total internal reflection lens unit Kink1 and the low-beam elbow-shaped focusing lens unit Kink2, the low-beam flat total internal reflection lens unit Flat1 and the low-beam flat focal line lens unit Flat2 can also be a one-piece structure, so that the low-beam elbow-shaped total internal reflection lens unit Kink1, the low-beam elbow-shaped focusing lens unit Kink2, the low-beam flat total internal reflection lens unit Flat1 and the low-beam flat focal line lens unit Flat2 can all be a one-piece structure, that is, the low-beam lens module can be a one-piece structure, which can further shorten the size chain and further reduce Fresnel loss and improve optical efficiency.
[0084] At this time, as shown in FIG. 6, the first reflection bowl surface 412 and the second reflection bowl surface 414 are arranged side by side along the third direction Y; as shown in FIG. 7, the first light entrance surface 411 and the second light entrance surface 413 are arranged side by side along the third direction Y, and if the first light entrance surface 411 and the second light entrance surface 413 have the same surface, the first light entrance surface 411 and the second light entrance surface 413 are combined into one light entrance surface.
[0085] Alternatively, the low-beam flat total internal reflection lens unit Flat1 and the low-beam flat focusing line lens unit Flat2 can also be a separate structure, which is determined according to the situation.
[0086] In the low-beam lens module provided by the embodiment of the present disclosure, the low-beam flat focusing line lens unit Flat2 can be a Z-shaped structure or an inverted Z-shaped structure. The low-beam flat lens module unit Flat shown in FIG. 8, FIG. 9, FIG. 13a and FIG. 13b is taken as an example of the low-beam flat focusing line lens unit Flat2 being a Z-shaped structure. The low-beam flat lens module unit with the low-beam flat focusing line lens unit Flat2 being an inverted Z-shaped structure can be adjusted adaptively, which will not be described here.
[0087] In order to better understand the present disclosure, FIG. 14 shows a main light ray tracing side view of a low-beam lens module according to an embodiment of the present disclosure, FIG. 15 shows a light ray tracing side view near a cutoff line of a low-beam lens module according to an embodiment of the present disclosure, FIG. 16 shows a low-beam flat light ray tracing top view of a low-beam lens module according to an embodiment of the present disclosure, and FIG. 17 shows an elbow-shaped cutoff line near a light ray tracing top view of a low-beam lens module according to an embodiment of the present application.
[0088] Optionally, as shown in FIGS. 6-7, 9, in the low-beam widening lens module unit Flat, the low-beam widening total internal reflection lens unit Flat1 is two, the two low-beam widening total internal reflection lens units Flat1 are arranged adjacently along the third direction Y and symmetrically along the second direction X, and the two low-beam widening total internal reflection lens units Flat1 correspond to the same low-beam widening focal line lens unit Flat2, that is, the two low-beam widening total internal reflection lens units Flat1 correspond to the same third total reflection surface 312, first total reflection surface 200 and first curved surface 100.
[0089] As such, as shown in FIG. 16, the light emitted through the two low-beam widening total internal reflection lens units Flat1 is distributed along the third direction Y, that is, along the third direction Y, the light emitted by the left low-beam widening total internal reflection lens unit Flat1 is distributed in the right half, and the light emitted by the right low-beam widening total internal reflection lens unit Flat1 is distributed in the left half, thereby facilitating the expansion of the emitted light pattern along the third direction Y (i.e., the lateral direction).
[0090] The two low-beam widening total internal reflection lens units Flat1 can be an integral molding structure, and the two low-beam widening total internal reflection lens units Flat1 can also be an integral molding structure with the low-beam widening focal line lens unit Flat2.
[0091] Optionally, in the low-beam widening lens module unit Flat, the low-beam widening total internal reflection lens unit Flat1 can also be one, and by adjusting the shape of the second reflection bowl surface 414, the emitted low-beam widening light pattern can also be achieved.
[0092] Correspondingly, the disclosure also provides a lighting module, which, in combination with FIGS. 6 and 7, includes a light source module and a low-beam lens module, the light source module includes a plurality of light sources 500, and the low-beam lens module is the low-beam lens module provided in any of the above embodiments. The light source 500 is arranged at the light entrance surface of the low-beam lens module, such as the first light entrance surface 411 and the second light entrance surface 413, so that the light emitted by the light source 500 is emitted as a complete low-beam light pattern after passing through the low-beam lens module.
[0093] Since the low-beam lens module has been described in detail in the foregoing embodiments, it will not be described here.
[0094] In this specification, each part is described in a combination of parallelism and progression, and each part focuses on the difference from other parts. The same or similar parts between each part can be referred to each other.
[0095] Having described above several embodiments of the disclosure, each expressly incorporated herein by reference in their entirety, features from the embodiments can be interchanged or combined as would be understood by one skilled in the art and can be adapted to any one of the other embodiments, and the embodiments are not limited in this regard. Various modifications to the embodiments described in terms of the general description above will be apparent to those of skill in the art in view of the general principles described herein and can be made without departing from the spirit and scope of the disclosure. Therefore, the disclosure 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 low-beam elbow focusing lens, the low-beam elbow focusing lens being an integral structure, the low-beam elbow focusing lens comprising a first curved surface, a first total reflection surface and a second total reflection surface, the first total reflection surface and the second total reflection surface being oppositely arranged along a first direction, the first curved surface being located on one side of the first total reflection surface along a second direction, the first direction and the second direction being perpendicular to each other; a bundle of parallel light is incident on the first curved surface, converges on the first curved surface, and is reflected by the first total reflection surface and the second total reflection surface in sequence, and is focused on a first focal point, the first focal point being located on a side of the second total reflection surface away from the first curved surface along the second direction; a distance between a geometric center of the first curved surface and the first focal point along the second direction is greater than a distance between a geometric center of the second total reflection surface and the first focal point along the second direction.
2. The dipped-bezel focusing lens of claim 1, wherein, the first curved surface has a first edge and a second edge oppositely arranged 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, the first connecting surface extending along the second direction; the second edge of the first curved surface is connected to the second total reflection surface through a second connecting surface, the second connecting surface extending along the second direction.
3. The dipped-bezel focusing lens of claim 2, wherein, the low-beam elbow focusing lens has a Z-shaped structure or an inverted Z-shaped structure.
4. The dipped elbow focusing lens according to any one of claims 1 to 3, wherein, the first curved surface is a complete free curved surface, and the first total reflection surface is a complete free curved surface or a plane.
5. The dipped-bezel focusing lens of any one of claims 1 to 3, wherein, the first curved surface is a convex surface along the first direction.
6. The dipped-bezel focusing lens of any one of claims 1 to 3, wherein, the second total reflection surface is a concave surface along a third direction, the third direction being perpendicular to the first direction and the second direction.
7. The dipped-bezel focusing lens of any one of claims 1 to 6, wherein, the low-beam elbow focusing lens is a transparent optical element, and a material of the low-beam elbow focusing lens comprises polymethyl methacrylate (PMMA) or polycarbonate (PC).
8. A dipped beam knee lens module, wherein, the low-beam elbow lens module comprises a low-beam elbow total internal reflection lens unit and a low-beam elbow focusing lens unit; the low-beam elbow total internal reflection lens unit comprises a first light entrance surface and a first reflection bowl surface, the first light entrance surface being a surface of the low-beam elbow total internal reflection lens unit facing away from the low-beam elbow focusing lens unit, and the first reflection bowl surface being deflected towards the low-beam elbow focusing lens unit relative to the first light entrance surface; the low-beam elbow focusing lens unit is the low-beam elbow focusing lens according to any one of claims 1 to 7, and the first focal point is located on an edge of the first reflection bowl surface close to the first light entrance surface; light emitted by an external light source is incident on the first light entrance surface, converges on the first reflection bowl surface from the first light entrance surface, is reflected by the first reflection bowl surface, and is reflected by the second total reflection surface and the first total reflection surface in sequence, and is finally emitted by the first curved surface, a shape of the first reflection bowl surface being projected as a low-beam elbow cutoff line light pattern, and the edge of the first reflection bowl surface close to the first light entrance surface being projected as a cutoff line of the low-beam elbow cutoff line light pattern.
9. The dipped beam knee lens module according to claim 8, wherein the low-beam elbow total internal reflection lens unit and the low-beam elbow focusing lens unit are an integral structure.
10. A low beam lens module, comprising a low beam elbow lens module unit and a low beam spread lens module unit; the low beam elbow lens module unit is used to form a low beam elbow cutoff line light pattern, and the low beam elbow lens module unit is the low beam elbow lens module of claim 8 or 9; the low beam spread lens module unit is used to form a low beam spread light pattern, and the low beam elbow cutoff line light pattern and the low beam spread light pattern combine to form a low beam light pattern.
11. The dipped lens module of claim 10, wherein, the low beam spread lens module unit comprises a low beam spread total internal reflection lens unit and a low beam spread focal line lens unit; the low beam spread focal line lens unit and the low beam elbow focusing lens unit are integrally formed, the low beam spread focal line lens unit and the low beam elbow focusing lens unit share the first curved surface and the first total reflection surface, the low beam spread focal line lens unit further comprises a third total reflection surface, the third total reflection surface and the first total reflection surface are oppositely arranged along the first direction, and the third total reflection surface and the second total reflection surface are arranged side by side along a third direction, the third direction is perpendicular to the first direction and perpendicular to the second direction; a bundle of parallel light is incident from the first curved surface, converges after the first curved surface, and is reflected in turn by the first total reflection surface and the third total reflection surface, converges along the first direction, and is parallel along the third direction, converging on a first focal line; the low beam spread total internal reflection lens unit comprises a second light entrance surface and a second reflection bowl surface, the second light entrance surface is a surface of the low beam spread total internal reflection lens unit facing away from the low beam spread focal line lens unit, the second reflection bowl surface is deflected towards the low beam spread focal line lens unit relative to the second light entrance surface, and the first focal line is located on an edge of the second reflection bowl surface close to the second light entrance surface; light emitted by an external light source is incident from the second light entrance surface, converges to the second reflection bowl surface through the second light entrance surface, is reflected by the second reflection bowl surface, and is then reflected in turn by the third total reflection surface and the first total reflection surface, and finally exits from the first curved surface, the shape of the second reflection bowl surface is projected as a low beam spread light pattern, and the edge of the second reflection bowl surface close to the second light entrance surface is projected as a cutoff line of the low beam spread light pattern.
12. The low beam lens module according to claim 11, wherein, the low beam spread total internal reflection lens unit and the low beam spread focal line lens unit are integrally formed; the first reflection bowl surface and the second reflection bowl surface are arranged side by side along the third direction, and the first light entrance surface and the second light entrance surface are arranged side by side along the third direction.
13. The dipped lens module according to claim 11 or 12, wherein, the low beam spread total internal reflection lens unit is two, the two low beam spread total internal reflection lens units are arranged side by side along the third direction, and the two low beam spread total internal reflection lens units are symmetrically arranged along the second direction; the two low beam spread total internal reflection lens units correspond to the same low beam spread focal line lens unit.
14. A lighting module comprising a light source module and a dipped lens module, the light source module comprising a plurality of light sources, the dipped lens module being a dipped lens module according to any one of claims 10 to 13.