Low-beam broadening focal line lens and related lens module and illumination module

Abstract

The invention discloses a low-beam broadening focal line lens, a related lens module and a related lighting module, and relates to the technical field of car lamps, the low-beam broadening focal line 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 total reflection surface and the second total reflection surface and is converged on a focal line; longitudinal focusing is achieved through the integrally-formed focal line lens structure, so that transverse focusing and longitudinal focusing are separated, the longitudinal focal length is larger than the transverse focal length, and a low-beam broadening light type wide in the transverse direction and narrow in the longitudinal direction can be achieved conveniently. The integrally-formed focal line 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 size and weight of the lens are reduced while the lighting effect is improved, 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 focal line widening 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 light shape of the low beam 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;

[0004] Second, single-layer single-focus lenses are 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 multifocal lens is composed of multiple single-layer single-focal lenses, which results 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 widening focal line lens and related lens modules and lighting modules, so as to realize longitudinal focusing as a focal line through an integrally formed focal line lens structure, and lateral focusing can be realized through a low beam widening total internal reflection lens structure, so as to realize the separation of horizontal and vertical focusing, and the longitudinal focal length is greater than the lateral focal length, so as to realize a low beam widening light type that is wide in the horizontal direction and narrow in the vertical direction; and the integrally formed focal line lens is a single-layer lens structure to effectively reduce Fresnel loss, and by utilizing total reflection, it is possible to fold the light path and shorten the size, thereby reducing the volume and weight of the lens while improving the lighting 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 focal line widening lens, the low beam focal line widening lens is an integrated structure, the low beam focal line widening 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, converged along the first direction, and parallel along a third direction, converged on a first focal line, the third direction is perpendicular to the first direction and perpendicular to the second direction, the first focal line is located on the side of the second total reflection surface away from the first curved surface along the second direction, and the first focal line extends along the third direction.

[0011] Optionally, the first curved surface has a first side and a second side that are arranged opposite to each other along the first direction;

[0012] 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;

[0013] 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.

[0014] Optionally, the low beam focal line widening lens has a Z-shaped structure, or an inverted Z-shaped structure.

[0015] 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.

[0016] A low beam widening lens module, the low beam widening lens module comprising a low beam widening total internal reflection lens unit and a low beam widening focal line lens unit;

[0017] The low beam widening 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 widening total internal reflection lens unit facing away from the low beam widening focal line lens unit, and the first reflection bowl surface is deflected toward the low beam widening focal line lens unit relative to the first light incident surface;

[0018] The low beam focal line widening lens unit is any one of the low beam focal line widening lenses described above, and the first focal line is located on the edge of the first reflection bowl surface close to the first light incident surface;

[0019] 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 widened 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 widened light type.

[0020] Optionally, the low-beam widening total internal reflection lens unit and the low-beam widening focal line lens unit are an integrally formed structure.

[0021] 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;

[0022] The two low-beam widening total internal reflection lens units correspond to the same low-beam widening focal line lens unit.

[0023] A low beam lens module, comprising a low beam widening lens module unit and a low beam elbow lens module unit;

[0024] The low beam widening lens module unit is used to form a low beam widening light pattern, and the low beam widening lens module unit is the low beam widening lens module described in any one of the above items;

[0025] 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 cut-off line light pattern and the low beam widening light pattern are combined to form a low beam light pattern.

[0026] 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 the low beam lens module mentioned above.

[0027] Compared with the prior art, the above technical solution has the following advantages:

[0028] The low beam focal line widening 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. 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, converged along the first direction, and parallel to a third direction, and converged on the first focal line. The third direction is perpendicular to the first direction and parallel to the second direction. The directions are perpendicular, the first direction, the second direction and the third direction constitute a three-dimensional coordinate system, the first focal line is located on the side of the second total reflection surface away from the first curved surface along the second direction, and the first focal line extends along the third direction, so that the first curved surface is mainly used to focus the parallel light incident from the first curved surface along the first direction (i.e., longitudinal direction), the first total reflection surface and the second total reflection surface are used to match the first curved surface, and also play a role of partial focusing and folding the light path, so that the parallel light incident from the first curved surface is focused along the first direction (i.e., longitudinal direction) to the first focal line extending along the third direction (lateral direction).

[0029] The low beam focal line widening lens provided in the embodiment of the present application has the following technical effects:

[0030] First, the longitudinal focusing is realized as a focal line through the integrally formed focal line lens structure, and the transverse focusing can be realized by the low beam widening total internal reflection lens structure, so that the horizontal and vertical focusing are separated, and the longitudinal focusing is greater than the transverse focal length, which is convenient for realizing the low beam widening light type with a wide transverse direction and a narrow longitudinal 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 longitudinal direction). For example, the size of the first curved surface along the first direction (i.e., the longitudinal direction) can be about 10 mm;

[0031] Second, the one-piece focal line 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;

[0032] Third, the one-piece focal line lens is a single-layer lens structure with less refraction, so the projected light has small dispersion and good color uniformity;

[0033] 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;

[0034] Fifth, the one-piece focal line lens can also avoid the problem of burns caused by the focusing of multi-layer lenses due to the access to sunlight. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] 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.

[0036] Figure 1 A schematic side view of a low beam focal line widening lens provided in an embodiment of the present application;

[0037] Figure 2 A schematic side view of another low beam focal line widening lens provided in an embodiment of the present application;

[0038] Figure 3 for Figure 1 A bottom-up schematic diagram of a low-beam focal line stretching lens is shown;

[0039] Figure 4 A schematic side view of a low beam stretch lens module provided in an embodiment of the present application;

[0040] Figure 5 for Figure 4 An oblique top view schematic diagram of a low beam widening lens module is shown;

[0041] Figure 6 A schematic side view of a main light tracing of a low beam widening lens module provided in an embodiment of the present application;

[0042] Figure 7 A schematic side view of a light tracing near a cutoff line of a low beam widening lens module provided in an embodiment of the present application;

[0043] Figure 8 A schematic top view of a low beam widening lens module provided in an embodiment of the present application showing a ray tracing diagram.

[0044] Reference numerals:

[0045] 100 - first curved surface; 200 - first total reflection surface; 312 - second total reflection surface; Z - first direction; X - second direction; Y - third direction; 101 - first edge; 102 - second edge; S1 - first connecting surface; S2 - second connecting surface; 413 - first light incident surface; 414 - first reflection bowl surface; 500 - light source. DETAILED DESCRIPTION

[0046] 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.

[0047] 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.

[0048] 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.

[0049] As described in the background technology section, the existing low beam lighting lens module has the following disadvantages:

[0050] First, because the single-layer single-focus lens has the same degree of focus in the horizontal and vertical directions, the controllability of the light shape of the low beam 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;

[0051] Second, single-layer single-focus lenses are 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;

[0052] Third, the single-layer multifocal lens is composed of multiple single-layer single-focal lenses, which results in a poor overall static appearance of the lens;

[0053] 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.

[0054] In view of this, the embodiment of the present application provides a low beam focal line widening lens. Figure 1 and Figure 2 Schematic side views of two low beam focal line widening 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 widening focal line lens is an integrated structure, and the low beam widening focal line lens includes a first curved surface 100, a first total reflection surface 200 and a second total reflection surface 312. The first total reflection surface 200 and the second total reflection surface 312 are arranged relatively along the first direction Z. The first curved surface 100 is located on one side of the first total reflection surface 200 along the second direction X. The first direction Z is perpendicular to the second direction X. The third direction Y is perpendicular to the first direction Z and to the second direction X. 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 in which the low beam widening light type projected by the low beam widening focal line lens is narrow in the longitudinal direction, and the third direction Y is the transverse direction in which the low beam widening light type projected by the low beam widening focal line lens is wide in the transverse direction.

[0055] Figure 3 Shows Figure 1 The bottom view of the low beam focal line widening lens shown in FIG. Figure 1-Figure 3 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 312 in sequence, and converges on the first focal line FF. The first focal line FF is located on the side of the second 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.

[0056] 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 first total reflection surface 200 and the second 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 mainly realizes the longitudinal focusing of the parallel light incident from the first curved surface 100.

[0057] 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).

[0058] Optionally, the first total reflection surface 200 may be a curved surface or a flat surface.

[0059] Optionally, the second total reflection surface 312 may be a curved surface or a flat surface.

[0060] 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 312 , which depend on specific circumstances.

[0061] In practical applications, the first curved surface 100 is a light emitting surface, that is, the outermost transparent molding surface of the low beam focal line widening lens. Figure 4As shown, the light emitted by the external light source 500 will first pass through the low beam widening total internal reflection lens unit Flat1, and then be incident on the low beam widening focal line lens unit Flat2. Therefore, focusing along the third direction Y (i.e., horizontal) can be additionally achieved through the low beam widening total internal reflection lens structure, thereby achieving horizontal and vertical focusing separation, and the longitudinal focal length is greater than the transverse focal length.

[0062] Therefore, the low beam focal line widening lens provided in the embodiment of the present application has the following technical effects:

[0063] First, the longitudinal focusing is realized as a focal line through the integrally formed focal line lens structure, and the transverse focusing can be realized by the low beam widening total internal reflection lens structure, so that the horizontal and vertical focusing are separated, and the longitudinal focusing is greater than the transverse focal length, which is convenient for realizing the low beam widening light type with a wide transverse direction and a narrow longitudinal 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 longitudinal direction). 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;

[0064] Second, the one-piece focal line 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;

[0065] Third, the one-piece focal line lens is a single-layer lens structure with less refraction, so the projected light has small dispersion and good color uniformity;

[0066] 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;

[0067] Fifth, the one-piece focal line lens can also avoid the problem of burns caused by the focusing of multi-layer lenses due to the access to sunlight.

[0068] 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 312 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 312 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 widening 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 widening focal line lens more free.

[0069] 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.

[0070] 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 312. Such an arrangement can shorten the path of the light beam transmitted in the lens and further improve the light efficiency.

[0071] 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 312 through the second connecting surface S2, optionally, as Figure 1 As shown, the low beam focal line widening lens has a Z-shaped structure; another option is as follows Figure 2 As shown, the low beam widening focal line lens has an inverted Z-shaped structure. Regardless of whether the low beam widening focal line lens has a Z-shaped structure or an inverted Z-shaped structure, the low beam widening focal line lens can effectively reduce Fresnel loss, and utilize total reflection, 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.

[0072] 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 312, and finally converges on the first focal line FF. Therefore, the first total reflection surface 200 can also be the outer shape surface of the low beam widened focal line 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.

[0073] Optionally, the low beam focal line widening lens may be a transparent optical element made of PMMA (polymethyl methacrylate) or PC (polycarbonate).

[0074] Based on the same inventive concept, the embodiment of the present application further provides a low beam widening lens module, Figure 4 A schematic side view of a low beam widening lens module provided in an embodiment of the present application is shown. Figure 5 Shows Figure 4 The oblique top view of the low beam widening lens module is shown in FIG. Figure 4 and Figure 5 As shown, the low beam widening lens module 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.

[0075] like Figure 4 and Figure 5 As shown, the low beam widening total internal reflection lens unit Flat1 includes a first light incident surface 413 and a first reflection bowl surface 414. The first light incident surface 413 is the surface of the low beam widening total internal reflection lens unit Flat1 that is away from the low beam widening focal line lens unit Flat2, and the first reflection bowl surface 414 is deflected toward the low beam widening focal line lens unit Flat2 relative to the first light incident surface 413.

[0076] like Figure 4 and Figure 5 As shown, the low-beam focal line stretching lens unit Flat2 is the low-beam focal line stretching lens provided by any of the aforementioned embodiments, and the first focal line FF is located on the edge 602 of the first reflection bowl surface 414 close to the first light incident surface 413 .

[0077] 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 413, converged to the first reflection bowl surface 414 through the first light incident surface 413, reflected by the first reflection bowl surface 414, and then reflected by the second 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 first reflection bowl surface 414 is projected as a low beam widened light type, and the edge 602 of the first reflection bowl surface 414 close to the first light incident surface 413 is projected as the cutoff line of the low beam widened light type.

[0078] Among them, the first light incident surface 413 mainly plays the role of collecting and focusing light; the first 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.

[0079] As is known from the above, the low beam widening focal line lens unit Flat2 is mainly used to achieve longitudinal focusing, and the low beam widening total internal reflection lens unit Flat1 is mainly used to achieve transverse focusing, thereby achieving 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.

[0080] Optional, such as Figure 4 and Figure 5 As shown, the low beam widening total internal reflection lens unit Flat1 and the low beam widening focal line lens unit Flat2 are an integrated structure. In this way, the low beam widening total internal reflection lens unit Flat1 and the low beam widening focal line lens unit Flat2 are combined into an integrated lens, which can further shorten the size chain, further reduce Fresnel loss, and improve optical efficiency.

[0081] Specifically, Figure 4 and Figure 5 As shown, the first total reflection surface 200 and the first reflection bowl surface 414 can be connected directly or through a connecting surface, and the second total reflection surface 312 and the first light incident surface 413 can be connected through a connecting surface. In this way, the light emitted by the external light source 500 is incident on the first light incident surface 413, transmitted inside the one-piece lens, and is reflected by the first reflection bowl surface 414, the second total reflection surface 312, 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.

[0082] 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.

[0083] It should be noted that in the low beam widening lens module provided in the embodiment of the present application, the low beam widening focal line lens unit Flat2 may be a Z-shaped structure or an inverted Z-shaped structure. Figure 4 The low beam stretch lens module shown is demonstrated by taking the low beam stretch focal line lens unit Flat2 of the Z-shaped structure as an example. The low beam stretch lens module including the low beam stretch focal line lens unit Flat2 of the inverted Z-shaped structure can be adaptively adjusted and will not be described in detail.

[0084] In order to better understand this application, Figure 6 A schematic side view of a main light tracing of a low beam widening lens module provided in an embodiment of the present application is shown. Figure 7 A schematic side view of light tracing near a cutoff line of a low beam widening lens module provided in an embodiment of the present application is shown. Figure 8A light tracing top view schematic diagram of a low beam widening lens module provided in an embodiment of the present application is shown. It can be seen that the light emitted by the external light source 500 is incident from the first light incident surface 413, converged to the first reflection bowl surface 414 through the first light incident surface 413, and after being reflected by the first reflection bowl surface 414, it is reflected by the second total reflection surface 312 and the first total reflection surface 200 in sequence, and finally emitted from the first curved surface 100 to form a low beam widening light pattern.

[0085] Optional, such as Figure 5 As shown, in the low beam widening lens module, there are two low beam widening total internal reflection lens units Flat1, and 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, 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 second total reflection surface 312, the first total reflection surface 200 and the first curved surface 100, or in other words, the light emitted by the external light source 500 passes through the corresponding total internal reflection lens units Flat1, and then is reflected by the same second total reflection surface 312 and the same first total reflection surface 200, and is uniformly emitted from the first curved surface 100.

[0086] So set up, such as Figure 8 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).

[0087] 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.

[0088] Alternatively, in the low-beam stretch lens module, the low-beam stretch total internal reflection lens unit Flat1 may be one, and the output low-beam stretch light pattern may be achieved by adjusting the shape of the first reflection bowl surface 414 .

[0089] Correspondingly, an embodiment of the present application provides a low beam lens module, which includes a low beam widening lens module unit and a low beam elbow lens module unit; wherein, the low beam widening lens module unit is used to form a low beam widening light pattern, and the low beam elbow lens module unit is used to form a low beam elbow cutoff line light pattern, and the low beam elbow cutoff line light pattern and the low beam widening light pattern are combined to form the low beam light pattern.

[0090] The low beam stretch lens module unit is the low beam stretch lens module provided by any of the above embodiments. Since the low beam stretch lens module has been described in detail in the above embodiments, it will not be described again here.

[0091] Correspondingly, the embodiment of the present application further provides a lighting module, which includes a light source module and a low beam lens module, the light source module includes a plurality of light sources 500, the low beam lens module is the low beam lens module provided in the above embodiment, and the light source 500 is arranged on the light incident surface of the low beam lens module, such as the first light incident surface 413, so that the light emitted by the light source 500 emits a complete low beam light pattern after passing through the low beam lens module. Among them, the light emitted by the light source 500 emits a low beam widening light pattern after passing through the low beam widening lens module unit in the low beam lens module.

[0092] Since the low beam stretch lens module has been described in detail in the above embodiments, it will not be described again here.

[0093] 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.

[0094] 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 focal line widening lens, characterized in that: The low beam focal line widening lens is an integrally formed structure, 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 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. 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, converged along the first direction, and parallel along the third direction, converged on the first focal line. The third direction is perpendicular to the first direction and perpendicular to the second direction. The first focal line is located on the side of the second total reflection surface away from the first curved surface along the second direction, and the first focal line extends along the third direction.

2. The low beam focal line widening 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 via 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 focal line widening lens according to claim 2, characterized in that: The low beam focal line widening lens has a Z-shaped structure or an inverted Z-shaped structure.

4. The low beam focal line stretching 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 widening lens module, characterized in that: The low beam widening lens module includes a low beam widening total internal reflection lens unit and a low beam widening focal line lens unit; The low-beam stretch total internal reflection lens unit comprises a first light incident surface and a first reflective bowl surface, wherein the first 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, and the first reflective bowl surface deflects the light toward the low-beam stretch focal line lens unit relative to the first light incident surface; The low-beam focal line stretching lens unit is the low-beam focal line stretching lens according to any one of claims 1 to 4, and the first focal line is located on an edge of the first reflective 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, converges to the first reflective bowl surface through the first light incident surface, is reflected by the first reflective bowl surface, and then reflected by the second total reflection surface and the first total reflection surface in sequence, and finally emitted by the first curved surface. The shape of the first reflective bowl surface is projected as a low beam widened light type, and the edge of the first reflective bowl surface close to the first light incident surface is projected as the cutoff line of the low beam widened light type.

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

7. The low beam stretch lens module according to claim 5 or 6, 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.

8. A low beam lens module, characterized in that: The low beam lens module includes a low beam widening lens module unit and a low beam elbow lens module unit; The low beam stretch lens module unit is used to form a low beam stretch light pattern, and the low beam stretch lens module unit is the low beam stretch lens module according to any one of claims 5 to 7; 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 cut-off line light pattern and the low beam stretched light pattern are combined to form a low beam light pattern.

9. 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 according to claim 8.

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