Low-beam elbow-shaped focusing lens and related lens module and lighting module

Abstract

The invention discloses a low-beam elbow-shaped focusing lens, a related lens module and a related lighting module, and relates to the technical field of car lamps, the low-beam elbow-shaped focusing lens comprises a first curved surface, a first total reflection surface and a second total reflection surface which are integrally formed, and a beam of parallel light enters from the first curved surface, is converged through the first curved surface and then enters the second curved surface; the light is reflected by the first fully reflecting surface and the second fully reflecting surface and is focused on a first focus; through the integrally-formed focusing lens structure, transverse and longitudinal focusing separation is achieved, the longitudinal focal length is larger than the transverse focal length, and a low-beam elbow-shaped cut-off line light type wide in the transverse direction and narrow in the longitudinal direction can be achieved conveniently; moreover, the integrally-formed focusing lens is a single-layer lens, Fresnel loss is effectively reduced, total reflection is utilized, a light path can be folded, the size can be shortened, the lighting effect is improved, meanwhile, the size and weight of the lens are reduced, and energy saving and cost saving are facilitated. Meanwhile, the refraction is less, the dispersion of projected light is small, and the color uniformity is good; the lens is good in static appearance consistency, and different modeling requirements can be met.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle lamps, and in particular to a low-beam elbow-shaped focusing lens and related lens modules and lighting modules. Background Art

[0002] The existing low beam lighting lens module usually includes two or more layers of lenses, an inner lens and an outer lens, wherein the outer lens is mostly a single-layer single-focus lens, or a single-layer multi-focus lens composed of multiple single-layer single-focus lenses. The existing low beam lighting lens module has the following disadvantages:

[0003] First, because the single-layer single-focus lens has the same degree of focus in the horizontal and vertical directions, the controllability of the low beam light shape that is flat up and down and wide left and right is poor;

[0004] Second, the single-layer single-focus lens is limited by the opening size and volume weight. Once the horizontal opening is longer, the lens thickness will increase accordingly, and the lens weight will also increase, which is not conducive to lightweight lens modules, energy saving and cost saving, and is not conducive to forming a horizontal long strip module shape, which has become one of the development trends of the industry;

[0005] Third, the single-layer multi-focus lens is composed of multiple single-layer single-focus lenses spliced ​​together, resulting in a poor overall static appearance of the lens;

[0006] Fourth, 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 severe dispersion. Summary of the invention

[0007] In order to solve the above technical problems, the embodiments of the present application provide a low-beam elbow-shaped focusing lens and related lens modules and lighting modules, so as to realize horizontal and vertical focusing separation through an integrally formed focusing lens structure, and the longitudinal focal length is greater than the lateral focal length, so as to realize a low-beam elbow-shaped cut-off line light type that is wide in the horizontal direction and narrow in the vertical direction; and the integrally formed focusing lens is a single-layer lens structure to effectively reduce Fresnel loss, and utilizes total reflection to fold the light path and shorten the size, thereby reducing the volume and weight of the lens while improving the light efficiency, which is beneficial to energy saving and cost saving; at the same time, there is less refraction, so that the projected light type has small dispersion and good color uniformity; in addition, both the light-emitting surface and the total reflection surface can be complete surfaces, and the static appearance consistency of the lens is good, which is beneficial to meet different styling requirements such as the styling of horizontal long strip modules.

[0008] To achieve the above objectives, the present application provides the following technical solutions:

[0009] A low beam elbow-shaped focusing lens, the low beam elbow-shaped focusing lens is an integrated structure, the low beam elbow-shaped focusing lens 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 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 direction is perpendicular to the second direction;

[0010] A beam of parallel light is incident on the first curved surface, converged by the first curved surface, and then reflected by the first total reflection surface and the second total reflection surface in sequence to be focused on a first focal point, and the first focal point is located on the side of the second total reflection surface away from the first curved surface along the second direction;

[0011] The distance between the geometric center of the first curved surface and the first focus along the second direction is greater than the distance between the geometric center of the second total reflection surface and the first focus along the second direction.

[0012] Optionally, the first curved surface has a first side and a second side that are arranged opposite to each other along the first direction;

[0013] 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;

[0014] The second edge 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.

[0015] Optionally, the low beam elbow-shaped focusing lens has a Z-shaped structure, or an inverted Z-shaped structure.

[0016] Optionally, 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.

[0017] A low beam elbow lens module, comprising a low beam elbow total internal reflection lens unit and a low beam elbow focusing lens unit;

[0018] The low-beam elbow-shaped total internal reflection lens unit comprises a first light incident surface and a first reflection bowl surface, wherein the first light incident surface is a surface of the low-beam elbow-shaped total internal reflection lens unit facing away from the low-beam elbow-shaped focusing lens unit, and the first reflection bowl surface is deflected toward the low-beam elbow-shaped focusing lens unit relative to the first light incident surface;

[0019] The low-beam elbow-shaped focusing lens unit is any one of the low-beam elbow-shaped focusing lenses described above, and the first focus is located on the edge of the first reflective bowl surface close to the first light incident surface;

[0020] The light emitted by the external light source is incident on the first light incident surface, converged to the first reflection bowl surface through the first light incident surface, reflected by the first reflection bowl surface, and then reflected by the second total reflection surface and the first total reflection surface in sequence, and finally emitted from the first curved surface. The shape of the first reflection bowl surface is projected as a low-beam elbow cutoff line light type, and the edge of the first reflection bowl surface close to the first light incident surface is projected as the cutoff line of the low-beam elbow cutoff line light type.

[0021] Optionally, the low-beam elbow-shaped total internal reflection lens unit and the low-beam elbow-shaped focusing lens unit are an integrally formed structure.

[0022] A low beam lens module, comprising a low beam elbow lens module unit and a low beam widening lens module unit;

[0023] The low beam elbow lens module unit is used to form a low beam elbow cut-off line light pattern, and the low beam elbow lens module unit is the low beam elbow lens module described in any one of the above items;

[0024] The low beam widening lens module unit is used to form a low beam widening light pattern, and the low beam elbow cut-off line light pattern and the low beam widening light pattern are combined to form a low beam light pattern.

[0025] Optionally, the low beam widening lens module unit includes a low beam widening total internal reflection lens unit and a low beam widening focal line lens unit;

[0026] The low beam widening focal line lens unit and the low beam elbow-shaped focusing lens unit are an integrally formed structure, the low beam widening focal line lens unit and the low beam elbow-shaped focusing lens unit share the first curved surface and the first total reflection surface, the low beam widening focal line lens unit further includes a third total reflection surface, the third total reflection surface and the first total reflection surface are arranged opposite to each other 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;

[0027] A beam of parallel light is incident on the first curved surface, converged by the first curved surface, and then reflected by the first total reflection surface and the third total reflection surface in sequence, converged along the first direction, and parallel to the third direction, and converged on the first focal line;

[0028] The low-beam stretch total internal reflection lens unit comprises a second light incident surface and a second reflection bowl surface, the second light incident surface is a surface of the low-beam stretch total internal reflection lens unit facing away from the low-beam stretch focal line lens unit, the second reflection bowl surface is deflected toward the low-beam stretch focal line lens unit relative to the second light incident surface, and the first focal line is located on an edge of the second reflection bowl surface close to the second light incident surface;

[0029] The light emitted by the external light source is incident from the second light incident surface, converged to the second reflection bowl surface through the second light incident surface, reflected by the second reflection bowl surface, and then reflected by the third total reflection surface and the first total reflection surface in sequence, and finally emitted from the first curved surface. The shape of the second reflection bowl surface is projected as a low beam widened light type, and the edge of the second reflection bowl surface close to the second light incident surface is projected as the cutoff line of the low beam widened light type.

[0030] Optionally, the low beam widening total internal reflection lens unit and the low beam widening focal line lens unit are an integrated structure;

[0031] The first reflective bowl surface and the second reflective bowl surface are arranged side by side along the third direction, and the first light incident surface and the second light incident surface are arranged side by side along the third direction.

[0032] Optionally, there are two low-beam widening total internal reflection lens units, the two low-beam widening total internal reflection lens units are adjacently arranged in parallel along the third direction, and the two low-beam widening total internal reflection lens units are symmetrically arranged along the second direction;

[0033] The two low-beam widening total internal reflection lens units correspond to the same low-beam widening focal line lens unit.

[0034] A lighting module comprises a light source module and a low beam lens module, wherein the light source module comprises a plurality of light sources, and the low beam lens module is any one of the low beam lens modules described above.

[0035] Compared with the prior art, the above technical solution has the following advantages:

[0036] The low-beam elbow-shaped focusing lens provided in the embodiment of the present application is an integrated structure, including 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 arranged opposite to each other along a first direction, and the first curved surface is located on one side of the first total reflection surface along the second direction, and the first direction and the second direction are perpendicular. A beam of parallel light is incident on the first curved surface, converged by the first curved surface, and then reflected by the first total reflection surface and the second total reflection surface in sequence, and focused on a first focal point. The first focal point is located on the side of the second total reflection surface away from the first curved surface along the second direction. In this way, 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), and the second total reflection surface is mainly used to focus the parallel light incident from the first curved surface along the first direction (i.e., longitudinal direction). The incident parallel light is reflected by the first total reflection surface, and the light beam is focused along the third direction (i.e., the horizontal direction). The third direction is perpendicular to the first direction and the second direction. The first direction, the second direction and the third direction constitute a three-dimensional coordinate system. The first total reflection surface is mainly used to match the first curved surface and the second total reflection surface, and also plays a role of partial focusing. The first total reflection surface and the second total reflection surface also play a role of folding the light path; and the distance between the geometric center of the first curved surface and the first focus along the second direction (i.e., the longitudinal focal length) is greater than the distance between the geometric center of the second total reflection surface and the first focus along the second direction (i.e., the horizontal focal length); thus, the low-beam elbow-shaped focusing lens provided in the embodiment of the present application has the following technical effects:

[0037] First, the horizontal and vertical focusing separation is achieved through the integrally formed focusing lens structure, and the vertical focal length is greater than the horizontal focal length, so as to facilitate the realization of a low beam elbow cut-off line light type that is wide in the horizontal direction and narrow in the vertical direction, and is also conducive to narrowing the opening size of the first curved surface 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 10 mm;

[0038] Second, the one-piece focusing lens is a single-layer lens structure, which is equivalent to integrating the outer lens and the inner lens in the traditional solution into one, effectively reducing Fresnel loss, and using total reflection to fold the light path and shorten the size, thereby reducing the volume and weight of the lens while improving the light efficiency, which is beneficial to energy saving and cost saving;

[0039] Third, the one-piece focusing lens is a single-layer lens structure with less refraction, so the projected light has small dispersion and good color uniformity;

[0040] Fourth, the first curved surface can be a complete free-form surface, and the first total reflection surface can be a complete free-form surface or a plane, so that the static appearance of the lens is consistent, which is conducive to meeting different modeling requirements such as horizontal long strip module modeling;

[0041] Fifth, the one-piece focusing lens can also avoid the problem of burns caused by the focusing of multiple layers of lenses due to the access to sunlight. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 A schematic side view of a low beam elbow-shaped focusing lens provided in an embodiment of the present application;

[0044] Figure 2 A schematic side view of another low-beam elbow-shaped focusing lens provided in an embodiment of the present application;

[0045] Figure 3 for Figure 1 A bottom-up schematic diagram of a low-beam elbow-shaped focusing lens is shown;

[0046] Figure 4 A side view schematic diagram of a low beam elbow lens module provided in an embodiment of the present application;

[0047] Figure 5 for Figure 4 An oblique top view schematic diagram of a low beam elbow lens module shown;

[0048] Figure 6 A schematic top view of a low beam lens module provided in an embodiment of the present application;

[0049] Figure 7 A bottom view schematic diagram of a low beam lens module provided in an embodiment of the present application;

[0050] Figure 8 A schematic side view of a low beam widening lens module unit in the low beam lens module provided in an embodiment of the present application;

[0051] Fig. 9 for Figure 8 An oblique top view schematic diagram of a low beam widening lens module unit is shown;

[0052] Fig.10 A side view schematic diagram of a low beam widening focal line lens unit in a low beam widening lens module unit in the low beam lens module provided in an embodiment of the present application;

[0053] Fig.11 A schematic side view of another low beam widening focal line lens unit in the low beam widening lens module unit in the low beam lens module provided in an embodiment of the present application;

[0054] Fig.12 for Fig.10 A bottom-up schematic diagram of a low-beam focal line widening lens unit is shown;

[0055] Fig.13a A schematic top view of an integrally formed low beam focal line widening lens unit and a low beam elbow focusing lens unit in a low beam lens module provided in an embodiment of the present application;

[0056] Fig.13b A bottom-up schematic diagram of an integrally formed low-beam focal line widening lens unit and a low-beam elbow-shaped focusing lens unit in a low-beam lens module provided in an embodiment of the present application;

[0057] Fig.14 A schematic side view of a main light tracing of a low beam lens module provided in an embodiment of the present application;

[0058] Fig.15 A schematic side view of a light tracing near a cutoff line of a low beam lens module provided in an embodiment of the present application;

[0059] Fig.16 A schematic top view of a low beam lens module provided in an embodiment of the present application showing light rays near a low beam widening cut-off line;

[0060] Fig.17 A schematic top view of light tracing near an elbow cutoff line of a low beam lens module provided in an embodiment of the present application.

[0061] Reference numerals:

[0062] 100-first curved surface; 200-first total reflection surface; 311-second total reflection surface; S1-first connecting surface; S2-second connecting surface; 101-first edge; 102-second edge, Z-first direction; X-second direction; Y-third direction; 500-light source; 411-first light incident surface; 412-first reflection bowl surface; F-first focus; Kink-low beam elbow lens module unit; Flat-low beam widening lens module unit; Kink1-low beam elbow total internal reflection lens unit; Kink2-low beam elbow focusing lens unit; Flat1-low beam widening total internal reflection lens unit; Flat2-low beam widening focal line lens unit; 312-third total reflection surface; 413-second light incident surface; 414-second reflection bowl surface; FF-first focal line. DETAILED DESCRIPTION

[0063] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0064] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0065] Secondly, the present application is described in detail with reference to the schematic diagrams. When describing the embodiments of the present application in detail, for the sake of convenience, the drawings showing the optical structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present application. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0066] As described in the background technology section, the existing low beam lighting lens module has the following disadvantages:

[0067] First, because the single-layer single-focus lens has the same degree of focus in the horizontal and vertical directions, the controllability of the low beam light shape that is flat up and down and wide left and right (i.e. wide in the horizontal direction and narrow in the vertical direction) is poor;

[0068] Second, the single-layer single-focus lens is limited by the opening size and volume weight. Once the horizontal opening is longer, the lens thickness will increase accordingly, and the lens weight will also increase, which is not conducive to lightweight lens modules, energy saving and cost saving, and is not conducive to forming a horizontal long strip module shape, which has become one of the development trends of the industry;

[0069] Third, the single-layer multi-focus lens is composed of multiple single-layer single-focus lenses spliced ​​together, resulting in a poor overall static appearance of the lens;

[0070] Fourth, 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 severe dispersion.

[0071] In view of this, an embodiment of the present application provides a low beam elbow focusing lens, Figure 1 and Figure 2 Schematic side views of two low beam elbow-shaped focusing lenses provided in the embodiments of the present application are shown respectively, as shown in FIG. Figure 1 and Figure 2As shown, the low beam elbow focusing lens is an integrated structure, and the low beam elbow focusing lens 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 arranged opposite to each other along the first direction Z, and the first curved surface 100 is located on one side of the first total reflection surface 200 along the second direction X, and the first direction Z and the second direction X are perpendicular; the 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 constitute a three-dimensional coordinate system, wherein the plane formed by the second direction X and the third direction Y is a horizontal plane, the first direction Z is a longitudinal direction, that is, the longitudinal direction of the low beam elbow cut-off line light type projected by the low beam elbow focusing lens is narrow in the longitudinal direction, and the third direction Y is the transverse direction of the low beam elbow cut-off line light type projected by the low beam elbow focusing lens is wide in the transverse direction.

[0072] like Figure 1 and Figure 2 As shown, a beam of parallel light is incident on the first curved surface 100, converged by the first curved surface 100, and then reflected by the first total reflection surface 200 and the second total reflection surface 311 in sequence, and converges at the first focus F. The first focus F is located on the side of the second total reflection surface 311 away from the first curved surface 100 along the second direction X.

[0073] Among them, 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 second total reflection surface 311 is mainly used to focus the light beam of the parallel light incident from the first curved surface 100 after being reflected by the first total reflection surface 200 along the third direction Y (i.e., transverse direction); the first total reflection surface 200 is mainly used to match the first curved surface 100 and the second total reflection surface 311, and also plays a role of partial focusing; the first total reflection surface 200 and the second total reflection surface 311 also play a role of folding the light path.

[0074] Optionally, the first curved surface 100 may be a convex surface along the first direction Z (ie, the longitudinal direction) so as to focus the parallel light incident from the first curved surface 100 along the first direction Z (ie, the longitudinal direction).

[0075] Optionally, the first total reflection surface 200 may be a curved surface or a flat surface.

[0076] Optionally, the second total reflection surface 311 may be a concave surface along the third direction Y (ie, transverse direction) to facilitate focusing of the light beam after the parallel light incident from the first curved surface 100 is reflected by the first total reflection surface 200 along the third direction Y (ie, transverse direction).

[0077] However, the present application does not limit the shapes of the first curved surface 100 , the first total reflection surface 200 , and the second total reflection surface 311 , which depends on specific circumstances.

[0078] In practical applications, the first curved surface 100 is a light emitting surface, i.e., the outermost transparent molding surface of the low beam elbow focusing lens. The incident light is incident on the second total reflection surface 311, and after being reflected by the second total reflection surface 311 and the first total reflection surface 200 in sequence, it is emitted from the first curved surface 100 to form a low beam elbow cut-off line light pattern.

[0079] Figure 3 Shows Figure 1 The bottom view of the low beam elbow focusing lens shown in FIG. Figure 3 As shown, the distance L between the geometric center of the first curved surface 100 and the first focus 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 focus F along the second direction X, wherein the distance L between the geometric center of the first curved surface 100 and the first focus 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 focus F along the second direction X is the transverse focal length, that is, the longitudinal focal length is greater than the transverse focal length.

[0080] Therefore, the low beam elbow-shaped focusing lens provided in the embodiment of the present application has the following technical effects:

[0081] First, the horizontal and vertical focusing separation is achieved through the integrally formed focusing lens structure, and the vertical focal length is greater than the horizontal focal length, so as to facilitate the realization of a low beam elbow cut-off line light type that is wide in the horizontal direction and narrow in the vertical direction, and is also conducive to narrowing the opening size of the first curved surface 100 as the light emitting surface along the first direction Z (i.e., the vertical direction). For example, the size of the first curved surface 100 along the first direction Z (i.e., the vertical direction) can be about 10 mm;

[0082] Second, the one-piece focusing lens is a single-layer lens structure, which is equivalent to integrating the outer lens and the inner lens in the traditional solution into one, effectively reducing Fresnel loss, and using total reflection to fold the light path and shorten the size, thereby reducing the volume and weight of the lens while improving the light efficiency, which is beneficial to energy saving and cost saving;

[0083] Third, the one-piece focusing lens is a single-layer lens structure with less refraction, so that the projected light has small dispersion and good color uniformity;

[0084] 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, so that the static appearance of the lens is consistent, which is conducive to meeting different modeling requirements such as horizontal long strip module modeling;

[0085] Fifth, the one-piece focusing lens can also avoid the problem of burns caused by the focusing of multiple layers of lenses due to the access to sunlight.

[0086] Optional, such as Figure 1 and Figure 2As shown, the first curved surface 100 has a first edge 101 and a second edge 102 that are arranged opposite to each other along the first direction Z; the first edge 101 of the first curved surface 100 is connected to 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 to the second total reflection surface 311 through a second connecting surface S2, and the second connecting surface S2 extends along the 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 311 respectively through a thick-walled structure between the first connecting surface S1 and the second connecting surface S2. Such an arrangement is more conducive to forming a low-beam elbow-shaped cut-off line light type that is wide in the horizontal direction and narrow in the vertical direction, and on the other hand, the first curved surface 100 extends along the second direction X, making the appearance design of the low-beam elbow-shaped focusing lens more free.

[0087] It can be understood 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 needs.

[0088] Alternatively, the first edge 101 of the first curved surface 100 may be directly connected to the first total reflection surface 200, and the second edge 102 of the first curved surface 100 may be directly connected to the second total reflection surface 311. Such an arrangement can shorten the path of the light beam transmitted in the lens and further improve the light efficiency.

[0089] On the basis that the first edge 101 of the first curved surface 100 is connected to the first total reflection surface 200 through the first connecting surface S1, and the second edge 102 of the first curved surface 100 is connected to the second total reflection surface 311 through the second connecting surface S2, optionally, as Figure 1 As shown, the low beam elbow focusing lens is in a Z-shaped structure; another option is as follows Figure 2 As shown, the low beam elbow focusing lens has an inverted Z-shaped structure. Regardless of whether the low beam elbow focusing lens has a Z-shaped structure or an inverted Z-shaped structure, the low beam elbow focusing lens can effectively reduce Fresnel loss, and utilize total reflection to fold the light path, shorten the size, and reduce the volume and weight of the lens while improving the light efficiency, which is beneficial to energy saving and cost saving.

[0090] As is known from the above, the first curved surface 100 is the light emitting 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 the outer shape surface of the low beam elbow focusing lens; 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, so that the outer surface design of the lens is more free, the static appearance consistency is good, and different styling requirements can be met.

[0091] Optionally, the low beam elbow-shaped focusing lens may be a transparent optical element made of PMMA (polymethyl methacrylate) or PC (polycarbonate).

[0092] Based on the same inventive concept, the embodiment of the present application also provides a low beam elbow lens module, Figure 4 A schematic side view of a low beam elbow lens module provided in an embodiment of the present application is shown. Figure 5 Shows Figure 4 The oblique top view schematic diagram of the low beam elbow lens module shown in FIG. Figure 4 and Figure 5 As shown, the low beam elbow lens module includes a low beam elbow total internal reflection (Total Internal Reflection, referred to as TIR) lens unit Kink1 and a low beam elbow focusing lens unit Kink2.

[0093] like Figure 4 and Figure 5 As shown, the low beam elbow shaped total internal reflection lens unit Kink1 includes a first light incident surface 411 and a first reflection bowl surface 412. The first light incident surface 411 is the surface of the low beam elbow shaped total internal reflection lens unit Kink1 facing away from the low beam elbow shaped focusing lens unit Kink2, and the first reflection bowl surface 412 is deflected toward the low beam elbow shaped focusing lens unit Kink2 relative to the first light incident surface 411.

[0094] like Figure 4 and Figure 5 As shown, the low-beam elbow-shaped focusing lens unit Kink2 is the low-beam elbow-shaped focusing lens provided by any of the aforementioned embodiments, and the first focus F is located on the edge 601 of the first reflection bowl surface 412 close to the first light incident surface 411 .

[0095] refer to Figure 4 and Figure 5 As shown, the light emitted by the external light source 500 is incident on the first light incident surface 411, converged to the first reflection bowl surface 412 through the first light incident surface 411, reflected by the first reflection bowl surface 412, and then reflected by the second total reflection surface 311 and the first total reflection surface 200 in sequence, and finally emitted from the first curved surface 100. The shape of the first reflection bowl surface 412 is projected as a low beam elbow cutoff line light type, and the edge 601 of the first reflection bowl surface 412 close to the first light incident surface 411 is projected as the cutoff line of the low beam elbow cutoff line light type.

[0096] Among them, the first light incident surface 411 mainly plays the role of collecting and focusing light; the first reflection bowl surface 412 is a total reflection free-form surface, which mainly plays the role of collecting and focusing light and forming a low-beam elbow-shaped cut-off line light type.

[0097] Optional, such as Figure 4 and Figure 5As shown, the low beam elbow shaped total internal reflection lens unit Kink1 and the low beam elbow shaped focusing lens unit Kink2 are an integrated structure, so that the low beam elbow shaped total internal reflection lens unit Kink1 and the low beam elbow shaped focusing lens unit Kink2 are combined into an integrated lens, which can further shorten the size chain, further reduce Fresnel loss, and improve optical efficiency.

[0098] Specifically, Figure 4 and Figure 5 As shown, the first total reflection surface 200 and the first reflection bowl surface 412 can be connected directly or through a connecting surface, and the second total reflection surface 311 and the first light incident surface 411 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 411, transmitted inside the one-piece lens, and is reflected by the first reflection bowl surface 412, the second total reflection surface 311, and the first total reflection surface 200 in sequence, and finally emitted from the first curved surface 100. The optical path is short, the Fresnel loss is small, and the optical efficiency is high.

[0099] Alternatively, the low-beam elbow-shaped total internal reflection lens unit Kink1 and the low-beam elbow-shaped focusing lens unit Kink2 may also be separate structures, depending on the specific situation.

[0100] It should be noted that in the low beam elbow lens module provided in the embodiment of the present application, the low beam elbow focusing lens unit Kink2 may be a Z-shaped structure or an inverted Z-shaped structure. Figure 4 The low beam elbow lens module shown is demonstrated by taking the low beam elbow focusing lens unit Kink2 with a Z-shaped structure as an example. The low beam elbow lens module including the low beam elbow focusing lens unit Kink2 with an inverted Z-shaped structure can be adaptively adjusted and will not be described in detail.

[0101] Accordingly, the embodiment of the present application further provides a low beam lens module, Figure 6 FIG. 1 shows a top view of a low beam lens module provided in an embodiment of the present application. Figure 7 FIG. 2 shows a bottom view schematic diagram of a low beam lens module provided in an embodiment of the present application. Figure 6 and Figure 7 As shown, the low beam lens module includes a low beam elbow lens module unit Kink and a low beam widening lens module unit Flat; wherein, the low beam elbow lens module unit Kink is used to form a low beam elbow cutoff line light pattern, and the low beam widening lens module unit Flat is used to form a low beam widening light pattern, and the low beam elbow cutoff line light pattern and the low beam widening light pattern are combined to form a complete low beam light pattern.

[0102] The low beam elbow lens module unit Kink may be the low beam elbow lens module provided by any of the above-mentioned embodiments. Since the low beam elbow lens module provided by the embodiments of the present application has been described in detail in the above-mentioned embodiments, it will not be repeated here.

[0103] Regarding the low beam widening lens module unit, optional, Figure 8 A schematic side view of a low beam widening lens module unit Flat is shown. Fig. 9 Shows Figure 8 The oblique top view schematic diagram of the low beam widening lens module unit Flat shown in FIG. Figure 6-Figure 9 As shown, the low beam widening lens module unit Flat includes a low beam widening total internal reflection (Total Internal Reflection, referred to as TIR) lens unit Flat1 and a low beam widening focal line lens unit Flat2.

[0104] Combination Figure 4-Figure 9 As shown, the low beam widening focal line lens unit Flat2 and the low beam elbow focusing lens unit Kink2 are an integrally formed structure, the low beam widening focal line lens unit Flat2 and the low beam elbow focusing lens unit Kink2 share the first curved surface 100 and the first total reflection surface 200, the low beam widening focal line lens unit Flat2 also includes a third total reflection surface 312, the third total reflection surface 312 and the first total reflection surface 200 are arranged opposite to each other 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.

[0105] Optionally, the third total reflection surface 312 may be a curved surface or a flat surface.

[0106] Fig.10 and Fig.11 Schematic side views of two types of low beam focal line widening lens units Flat2 are shown respectively, Fig.12 Shows Fig.10 The bottom view of the low beam focal line widening lens unit Flat2 is shown in FIG. Figure 10-12 As shown, a beam of parallel light is incident on the first curved surface 100, converged by the first curved surface 100, and then reflected by the first total reflection surface 200 and the third total reflection surface 312 in sequence, converged along the first direction Z, and parallel to the third direction Y, 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.

[0107] In order to better understand this application, Fig.13a The figure shows a top view of an integrally formed low beam focal line widening lens unit Flat2 and a low beam elbow focusing lens unit Kink2. Fig.13bAn upward schematic diagram of the integrally formed low-beam focal line widening lens unit Flat2 and the low-beam elbow focusing lens unit Kink2 is shown. It can be seen that if a beam of parallel light is incident on the first curved surface 100, after being converged by the first curved surface 100, it is reflected by the first total reflection surface 200 and the second total reflection surface 311 in sequence, it converges to a first focus F; if a beam of parallel light is incident on the first curved surface 100, after being converged by the first curved surface 100, it is reflected by the first total reflection surface 200 and the third total reflection surface 312 in sequence, it converges to a first focal line FF.

[0108] As known above, optionally, the first edge 101 of the first curved surface 100 is connected to 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 to the second total reflection surface 311 through a second connecting surface S2, and the second connecting surface S2 extends 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 an integrated structure, therefore, Fig.10 and Fig.11 As shown, the second side 102 of the first curved surface 100 is also connected to 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 horizontal direction and narrow in the vertical direction, and the lens appearance design is more flexible.

[0109] As known from the above, another optional option is that the first edge 101 of the first curved surface 100 can also be directly connected to the first total reflection surface 200, and the second edge 102 of the first curved surface 100 can also be directly connected to the second total reflection surface 311. On this basis, since the low beam widening focal line lens unit Flat2 and the low beam elbow focusing lens unit Kink2 are an integrally formed structure, the second edge 102 of the first curved surface 100 can also be directly connected to the third total reflection surface 312. In this way, the path of the light beam transmitted in the lens can be shortened, and the light efficiency can be further improved.

[0110] Since the low beam focal line widening lens unit Flat2 and the low beam elbow focusing lens unit Kink2 are an integrated structure, it is optional, such as Figure 1 and Fig.10 As shown, when the low beam elbow focusing lens unit Kink2 is a Z-shaped structure, the low beam focal line widening lens unit Flat2 is also a Z-shaped structure; another option is as follows: Figure 2 and Fig.11 As shown, when the low beam elbow-shaped focusing lens unit Kink2 is an inverted Z-shaped structure, the low beam focal line widening lens unit Flat2 is also an inverted Z-shaped structure.

[0111] like Figure 6-Figure 9As shown, the low beam widening total internal reflection lens unit Flat1 includes a second light incident surface 413 and a second reflection bowl surface 414, the second light incident surface 413 is the surface of the low beam widening total internal reflection lens unit Flat1 away from the low beam widening focal line lens unit Flat2, the second reflection bowl surface 414 is deflected toward the low beam widening focal line lens unit Flat2 relative to the second light incident surface 413, and the first focal line FF is located on the edge 602 of the second reflection bowl surface 414 close to the second light incident surface 413.

[0112] refer to Figure 6-Figure 9 As shown, the light emitted by the external light source 500 is incident on the second light incident surface 413, converged to the second reflection bowl surface 414 through the second light incident surface 413, reflected by the second reflection bowl surface 414, and then reflected by the third total reflection surface 312 and the first total reflection surface 200 in sequence, and finally emitted from the first curved surface 100. The shape of the second reflection bowl surface 414 is projected as a low beam widened light type, and the edge of the second reflection bowl surface 414 close to the second light incident surface 413 is projected as the cutoff line of the low beam widened light type.

[0113] Among them, the second light incident surface 413 mainly plays the role of collecting and focusing light; the second reflection bowl surface 414 is a total reflection free-form surface, which mainly plays the role of collecting and focusing light and forming a low-beam widening light pattern.

[0114] It can be understood that, for the low beam widening lens module unit Flat, 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 reflection surface 200 and the third total reflection surface 312 are used to match the first curved surface 100, and also play a role in partial focusing and folding the light path; that is, the low beam widening focal line lens unit Flat2 mainly realizes the longitudinal focusing of the parallel light incident from the first curved surface 100, and the low beam widening total internal reflection lens unit Flat1 is mainly used for transverse focusing, thereby realizing the separation of transverse and longitudinal focusing, and the longitudinal focusing is greater than the transverse focal length, which is convenient for realizing a low beam widening light type that is wide in the transverse direction and narrow in the longitudinal direction, and is also beneficial to narrowing the opening size of the first curved surface 100 as the light exit 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 10 mm.

[0115] It can also be understood that, since the low beam widening focal line lens unit Flat2 and the low beam elbow focusing lens unit Kink2 are an integrally formed structure, in the low beam widening lens module unit Flat, the integrally formed low beam widening focal line lens unit Flat2 is a single-layer lens structure, which is equivalent to integrating the outer lens and the inner lens in the traditional solution into one, effectively reducing Fresnel loss, and utilizing total reflection, it is possible to fold the optical path, shorten the size, and reduce the volume and weight of the lens while improving the light efficiency, which is beneficial to energy saving and cost saving; and there is less refraction, so that the projected light type has small dispersion and good color uniformity; it can also avoid the problem of burns caused by the focusing of multi-layer lenses due to the access to sunlight. In addition, the low beam widening focal line lens unit Flat2 and the low beam 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 static appearance of the lens is consistent, which is beneficial to meet different modeling requirements such as horizontal long strip module modeling.

[0116] It should be noted that if Figure 6 and Figure 7 As shown, the present application does not limit the number of combinations of the low beam elbow lens module unit Kink and the low beam widening lens module unit Flat in the low beam lens module, that is, in the low beam lens module, the number of the low beam elbow lens module unit Kink and the number of the low beam widening lens module unit Flat are specifically set according to demand.

[0117] like Figure 6 and Figure 7 As shown, similar to the low beam elbow-shaped total internal reflection lens unit Kink1 and the low beam elbow-shaped focusing lens unit Kink2 which can be an integrally formed structure, the low beam widening total internal reflection lens unit Flat1 and the low beam widening focal line lens unit Flat2 can also be an integrally formed structure. In this way, the low beam elbow-shaped total internal reflection lens unit Kink1, the low beam elbow-shaped focusing lens unit Kink2, the low beam widening total internal reflection lens unit Flat1 and the low beam widening focal line lens unit Flat2 can all be an integrally formed structure, that is, the low beam lens module can be an integrally formed structure, which can further shorten the size chain, further reduce the Fresnel loss, and improve the optical efficiency.

[0118] At this time, if Figure 6 As shown, the first reflective bowl surface 412 and the second reflective bowl surface 414 are arranged side by side along the third direction Y; Figure 7 As shown, the first light incident surface 411 and the second light incident surface 413 are arranged side by side along the third direction Y. If the first light incident surface 411 and the second light incident surface 413 have the same surface, the first light incident surface 411 and the second light incident surface 413 are combined into one light incident surface.

[0119] Alternatively, the low-beam widening total internal reflection lens unit Flat1 and the low-beam widening focal line lens unit Flat2 may also be separate structures, depending on the specific situation.

[0120] It should be noted that in the low beam lens module provided in the embodiment of the present application, the low beam focal line widening lens unit Flat2 may be a Z-shaped structure or an inverted Z-shaped structure. Figure 8 , Fig. 9 , Figure 13a-13b The low beam widening lens module unit Flat shown is demonstrated by taking the low beam widening focal line lens unit Flat2 of Z-shaped structure as an example. The low beam widening lens module unit including the low beam widening focal line lens unit Flat2 of inverted Z-shaped structure can be adaptively adjusted and will not be described in detail.

[0121] In order to better understand this application, Fig.14 A schematic side view of a main body light tracing of a low beam lens module provided in an embodiment of the present application is shown. Fig.15 A schematic side view of light tracing near a cutoff line of a low beam lens module provided by an embodiment of the present application is shown. Fig.16 A schematic top view of a low beam widening light tracing system of a low beam lens module provided by an embodiment of the present application is shown. Fig.17 A schematic top view of light tracing near an elbow cutoff line of a low beam lens module provided by an embodiment of the present application is shown.

[0122] Optional, such as Figure 6-Figure 7 , Fig. 9 As shown, in the low beam widening lens module unit Flat, there are two low beam widening total internal reflection lens units Flat1, the two low beam widening total internal reflection lens units Flat1 are adjacent to and arranged side by side along the third direction Y, and the two low beam widening total internal reflection lens units Flat1 are symmetrically arranged along the second direction X, 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, the first total reflection surface 200 and the first curved surface 100.

[0123] So set up, such as Fig.16 As shown, the light emitted by the two low-beam widening total internal reflection lens units Flat1 is cross-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, which is conducive to expanding the emitted light pattern along the third direction Y (i.e., horizontally).

[0124] It should be noted that the two low-beam widening total internal reflection lens units Flat1 can be an integrally formed structure, and the two low-beam widening total internal reflection lens units Flat1 can also be an integrally formed structure with the low-beam widening focal line lens unit Flat2.

[0125] Alternatively, in the low-beam widening lens module unit Flat, the low-beam widening total internal reflection lens unit Flat1 may also be one, and by adjusting the shape of the second reflection bowl surface 414, the emitted low-beam widening light pattern may also be achieved.

[0126] Accordingly, the embodiment of the present application further provides a lighting module, Figure 6 and Figure 7 The lighting module includes a light source module and a low beam lens module. The light source module includes multiple light sources 500. The low beam lens module is the low beam lens module provided by any of the above embodiments. The light source 500 is arranged on the light incident surface of the low beam lens module, such as the first light incident surface 411 and the second light incident surface 413. Therefore, the light emitted by the light source 500 passes through the low beam lens module and emits a complete low beam light pattern.

[0127] Since the low beam lens module has been described in detail in the aforementioned embodiments, it will not be described again here.

[0128] The various parts in this manual are described in a combination of parallel and progressive ways. Each part focuses on the differences from other parts, and the same or similar parts between the various parts can be referenced to each other.

[0129] With respect to the above description of the disclosed embodiments, the features described in the embodiments in this specification may be replaced or combined with each other, so that professionals in the field can implement or use the present application. Various modifications to these embodiments will be apparent to professionals in the field, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A low beam elbow focusing lens, characterized in that: The low beam elbow-shaped focusing lens is an integrated structure, and comprises a first curved surface, a first total reflection surface, and a second total reflection surface, wherein the first total reflection surface and the second total reflection surface 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 direction is perpendicular to the second direction; A beam of parallel light is incident on the first curved surface, converged by the first curved surface, and then reflected by the first total reflection surface and the second total reflection surface in sequence to be focused on a first focal point, and the first focal point is located on the side of the second total reflection surface away from the first curved surface along the second direction; The distance between the geometric center of the first curved surface and the first focus along the second direction is greater than the distance between the geometric center of the second total reflection surface and the first focus along the second direction.

2. The low beam elbow focusing 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 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 edge 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 low beam elbow focusing lens according to claim 2, characterized in that: The low beam elbow-shaped focusing lens has a Z-shaped structure or an inverted Z-shaped structure.

4. The low beam elbow focusing lens according to any one of claims 1 to 3, characterized in that: 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. A low beam elbow lens module, characterized in that: 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-shaped total internal reflection lens unit comprises a first light incident surface and a first reflection bowl surface, wherein the first light incident surface is a surface of the low-beam elbow-shaped total internal reflection lens unit facing away from the low-beam elbow-shaped focusing lens unit, and the first reflection bowl surface is deflected toward the low-beam elbow-shaped focusing lens unit relative to the first light incident surface; The low-beam elbow-shaped focusing lens unit is the low-beam elbow-shaped focusing lens according to any one of claims 1 to 4, and the first focal point is located on the edge of the first reflecting bowl surface close to the first light incident surface; The light emitted by the external light source is incident on the first light incident surface, converged to the first reflection bowl surface through the first light incident surface, reflected by the first reflection bowl surface, and then reflected by the second total reflection surface and the first total reflection surface in sequence, and finally emitted from the first curved surface. The shape of the first reflection bowl surface is projected as a low-beam elbow cutoff line light type, and the edge of the first reflection bowl surface close to the first light incident surface is projected as the cutoff line of the low-beam elbow cutoff line light type.

6. The low beam elbow lens module according to claim 5, characterized in that: The low-beam elbow-shaped total internal reflection lens unit and the low-beam elbow-shaped focusing lens unit are an integrally formed structure.

7. A low beam lens module, characterized in that: The low beam lens module comprises a low beam elbow lens module unit and a low beam widening lens module unit; The low beam elbow lens module unit is used to form a low beam elbow cut-off line light pattern, and the low beam elbow lens module unit is the low beam elbow lens module according to claim 5 or 6; The low beam widening lens module unit is used to form a low beam widening light pattern, and the low beam elbow cut-off line light pattern and the low beam widening light pattern are combined to form a low beam light pattern.

8. The low beam lens module according to claim 7, characterized in that: The low beam widening lens module unit comprises a low beam widening total internal reflection lens unit and a low beam widening focal line lens unit; The low beam widening focal line lens unit and the low beam elbow-shaped focusing lens unit are an integrally formed structure, the low beam widening focal line lens unit and the low beam elbow-shaped focusing lens unit share the first curved surface and the first total reflection surface, the low beam widening focal line lens unit further includes a third total reflection surface, the third total reflection surface and the first total reflection surface are arranged opposite to each other 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 beam of parallel light is incident on the first curved surface, converged by the first curved surface, and then reflected by the first total reflection surface and the third total reflection surface in sequence, converged along the first direction, and parallel to the third direction, and converged on the first focal line; The low-beam stretch total internal reflection lens unit comprises a second light incident surface and a second reflection bowl surface, the second light incident surface is a surface of the low-beam stretch total internal reflection lens unit facing away from the low-beam stretch focal line lens unit, the second reflection bowl surface is deflected toward the low-beam stretch focal line lens unit relative to the second light incident surface, and the first focal line is located on an edge of the second reflection bowl surface close to the second light incident surface; The light emitted by the external light source is incident from the second light incident surface, converged to the second reflection bowl surface through the second light incident surface, reflected by the second reflection bowl surface, and then reflected by the third total reflection surface and the first total reflection surface in sequence, and finally emitted from the first curved surface. The shape of the second reflection bowl surface is projected as a low beam widened light type, and the edge of the second reflection bowl surface close to the second light incident surface is projected as the cutoff line of the low beam widened light type.

9. The low beam lens module according to claim 8, characterized in that: The low beam widening total internal reflection lens unit and the low beam widening focal line lens unit are an integrated structure; The first reflective bowl surface and the second reflective bowl surface are arranged side by side along the third direction, and the first light incident surface and the second light incident surface are arranged side by side along the third direction.

10. The low beam lens module according to claim 8 or 9, characterized in that: There are two low-beam widening total internal reflection lens units, the two low-beam widening total internal reflection lens units are adjacently arranged in parallel along the third direction, and the two low-beam widening total internal reflection lens units are symmetrically arranged along the second direction; The two low-beam widening total internal reflection lens units correspond to the same low-beam widening focal line lens unit.

11. A lighting module, characterized in that: It comprises a light source module and a low beam lens module, wherein the light source module comprises a plurality of light sources, and the low beam lens module is the low beam lens module as claimed in any one of claims 7 to 10.

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