Low beam module

Abstract

The invention discloses a low-beam module and relates to the technical field of car lamps, the low-beam module comprises a light source, a first optical structure and a thick-wall light emitting structure which are sequentially arranged in the first direction, and the surface, away from the first optical structure, of the thick-wall light emitting structure is a light emitting surface; the side face of the thick-wall light emitting structure comprises a first side face and a second side face which are oppositely arranged in the second direction, and the first direction is perpendicular to the second direction. The first groove extending in the third direction is formed in the second side face of the thick-wall light emitting structure, the third direction is perpendicular to the first direction and the second direction, and the bottom width of the first groove is smaller than the opening width of the first groove. And at least one of the two side walls of the first groove comprises a plurality of arc-shaped surfaces arranged in the third direction, so that the bottom of the first groove and the two side walls form a dimming structure, the dimming structure is used for forming III-region irradiation light above the low beam cut-off line, the light-emitting surface of the thick-wall light-emitting structure is designed more freely, and the static appearance consistency is good.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle lamps, and in particular to a low beam module. Background Art

[0002] We know that the low beam of a vehicle is for close-range lighting. In order to optimize the lighting effect, ensure driving safety, and reduce interference to other road users, the lighting in Zones I, II, and III of the low beam light pattern must meet the requirements. Zone I is the road surface 10m-25m away from the front of the vehicle, and Zone II is the road surface 50m and farther away from the front of the vehicle. The light pattern of Zones I and II is mainly composed of the low beam elbow cutoff line light pattern combined with the low beam widening light pattern. Zone III is the area above the low beam cutoff line. Although the light in Zone III is relatively weak, Zone III is an anti-glare zone, mainly to avoid glare interference to other road users (such as pedestrians, cyclists, or drivers of oncoming vehicles). Therefore, the lighting design of the low beam Zone III is crucial to safe driving.

[0003] Currently, the optical structure for forming the zone III illumination light above the low beam cut-off line is generally designed on the light emitting surface of the optical element, which affects the appearance of the optical element. Summary of the invention

[0004] In order to solve the above technical problems, the embodiment of the present application provides a low beam module, in which a dimming structure is designed on the side of the thick-walled light-emitting structure of the low beam module rather than on the light-emitting surface, and the dimming structure is used to form the illumination light of zone III above the low beam cut-off line, so that the design of the light-emitting surface of the thick-walled light-emitting structure is more free, the static appearance consistency is good, and different styling requirements can be met.

[0005] To achieve the above objectives, the present application provides the following technical solutions:

[0006] A low beam module, comprising a light source, a first optical structure and a thick-walled light-emitting structure arranged in sequence along a first direction, wherein a surface of the thick-walled light-emitting structure facing away from the first optical structure is a light-emitting surface, and a side surface of the thick-walled light-emitting structure comprises a first side surface and a second side surface arranged opposite to each other along a second direction, wherein the first direction is perpendicular to the second direction;

[0007] The second side surface is provided with a first groove extending along a third direction, the third direction is perpendicular to the first direction and perpendicular to the second direction; the width of the bottom of the first groove along the first direction is smaller than the width of the opening of the first groove along the first direction, both side walls of the first groove are arc-shaped surfaces, the bottom and the two side walls of the first groove constitute a dimming structure, and at least one of the two side walls of the first groove includes a plurality of sub-arc-shaped surfaces arranged along the third direction;

[0008] After the light emitted by the light source passes through the first optical structure, a part of the light passes through the interior of the thick-walled light output structure, and then is emitted from the light output surface to form a low-beam elbow cutoff line light type and / or a low-beam widened light type; another part of the light passes through the dimming structure, is diverged or converged along the third direction by the multiple sub-arc surfaces, and then is emitted from the light output surface to form zone III illumination light above the low-beam cutoff line.

[0009] Optionally, the first side surface and the second side surface are provided with a plurality of light guide tooth structures arranged along the first direction and extending along the third direction, and the light guide tooth structures protrude in a direction away from the thick-walled light output structure;

[0010] The light-guiding tooth structure is in the shape of a triangular cone, and includes a first tooth surface, a second tooth surface, and a virtual surface connecting the first tooth surface and the second tooth surface. The virtual surfaces of the light-guiding tooth structures located on the first side surface are in the same plane, and the virtual surfaces of the light-guiding tooth structures located on the second side surface are in the same plane. The first tooth surface is located on the side of the second tooth surface close to the light-emitting surface, and the angle between the first tooth surface and the virtual surface is greater than the angle between the second tooth surface and the virtual surface.

[0011] Optionally, the angle θ1 between the first tooth surface and the virtual surface satisfies: 51°<θ1<90°;

[0012] An included angle θ2 between the second tooth surface and the virtual surface satisfies: 5°<θ2<39°.

[0013] Optionally, the first optical structure includes a first reflective light-condensing structure and a first total reflection surface structure sequentially arranged along the first direction;

[0014] The first reflective light-concentrating structure comprises a first light-incident surface and a first reflective bowl surface, the first light-incident surface is a surface of the first reflective light-concentrating structure facing away from the first total reflection surface structure, and the first reflective bowl surface is deflected relative to the first light-incident surface to the first total reflection surface structure;

[0015] The first total reflection surface structure comprises a first total reflection surface and a second total reflection surface which are arranged opposite to each other along the second direction, the first total reflection surface is connected to the first side surface, and the second total reflection surface is connected to the second side surface; a beam of parallel light is incident from the light emitting surface, converged by the light emitting surface, and then reflected by the first total reflection surface and the second total reflection surface in sequence, and focused on a first focus, and the first focus is located on the edge of the first reflection bowl surface close to the first light incident surface;

[0016] The light emitted by the light source is incident from the first light incident surface, converged to the first reflective bowl surface through the first light incident surface, reflected by the first reflective bowl surface, and then reflected by the second total reflection surface and the first total reflection surface in sequence, enters the thick-walled light output structure, and then exits from the light output surface, the shape of the first reflective bowl surface is projected as a low-beam elbow cut-off line light type, the edge of the first reflective bowl surface close to the first light incident surface is projected as the cut-off line of the low-beam elbow cut-off line light type, and the multiple sub-arc surfaces in the dimming structure diverge along the third direction with respect to the incident light.

[0017] Optionally, the first optical structure includes a second reflective light-condensing structure and a second total reflection surface structure sequentially arranged along the first direction;

[0018] The second reflective light-concentrating structure comprises a second light-incident surface and a second reflective bowl surface, the second light-incident surface is a surface of the second reflective light-concentrating structure away from the second total reflection surface structure, and the second reflective bowl surface is deflected relative to the second light-incident surface to the second total reflection surface structure;

[0019] The second total reflection surface structure comprises a third total reflection surface and a fourth total reflection surface which are arranged opposite to each other along the second direction, the third total reflection surface is connected to the first side surface, and the fourth total reflection surface is connected to the second side surface; a beam of parallel light is incident from the light emitting surface, converges through the light emitting surface, and then is reflected through the third total reflection surface and the fourth total reflection surface in sequence, and converges on a first focal line, and the first focal line is located on the edge of the second reflection bowl surface close to the second light incident surface;

[0020] The light emitted by the 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 fourth total reflection surface and the third total reflection surface in sequence, enters the thick-walled light output structure, and then exits from the light output 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 a cutoff line of the low-beam widened light type. The multiple sub-arc surfaces in the dimming structure converge the incident light along the third direction.

[0021] Optionally, the first optical structure includes a first reflective light-condensing structure and a first total reflection surface structure sequentially arranged along the first direction, and a second reflective light-condensing structure and a second total reflection surface structure sequentially arranged along the first direction;

[0022] The first reflective light-concentrating structure comprises a first light-incident surface and a first reflective bowl surface, the first light-incident surface is a surface of the first reflective light-concentrating structure facing away from the first total reflection surface structure, and the first reflective bowl surface is deflected relative to the first light-incident surface to the first total reflection surface structure;

[0023] The first total reflection surface structure comprises a first total reflection surface and a second total reflection surface which are arranged opposite to each other along the second direction, the first total reflection surface is connected to the first side surface, and the second total reflection surface is connected to the second side surface; a beam of parallel light is incident from the light emitting surface, converged by the light emitting surface, and then reflected by the first total reflection surface and the second total reflection surface in sequence, and focused on a first focus, and the first focus is located on the edge of the first reflection bowl surface close to the first light incident surface;

[0024] The light emitted by the light source is incident from the first light incident surface, converged to the first reflective bowl surface through the first light incident surface, reflected by the first reflective bowl surface, and then reflected by the second total reflection surface and the first total reflection surface in sequence, enters the thick-walled light output structure, and then exits from the light output surface, the shape of the first reflective bowl surface is projected as a low-beam elbow cut-off line light type, the edge of the first reflective bowl surface close to the first light incident surface is projected as the cut-off line of the low-beam elbow cut-off line light type, and the multiple sub-arc surfaces in the dimming structure diverge along the third direction with respect to the incident light;

[0025] The second reflective light-concentrating structure comprises a second light-incident surface and a second reflective bowl surface, the second light-incident surface is a surface of the second reflective light-concentrating structure away from the second total reflection surface structure, and the second reflective bowl surface is deflected relative to the second light-incident surface to the second total reflection surface structure;

[0026] The second total reflection surface structure comprises a third total reflection surface and a fourth total reflection surface which are arranged opposite to each other along the second direction, the third total reflection surface is connected to the first side surface, and the fourth total reflection surface is connected to the second side surface; a beam of parallel light is incident from the light emitting surface, converges through the light emitting surface, and then is reflected through the third total reflection surface and the fourth total reflection surface in sequence, and converges on a first focal line, and the first focal line is located on the edge of the second reflection bowl surface close to the second light incident surface;

[0027] The light emitted by the 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 fourth total reflection surface and the third total reflection surface in sequence, enters the thick-walled light output structure, and then is emitted from the light output 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 a cutoff line of the low-beam widened light type.

[0028] Optionally, the second side surface is further provided with a second groove extending along the third direction, the second groove is located on a side of the first groove close to the first optical structure, the width of the bottom of the second groove along the first direction is smaller than the width of the opening of the second groove along the first direction, and the bottom and two side walls of the second groove constitute a light blocking structure;

[0029] After the light emitted by the light source passes through the first optical structure, part of the light reaches the light blocking structure, part of the light passing through the light blocking structure reaches the dimming structure, another part of the light reaches the light guide tooth structure, and another part of the light reaches the light emitting surface, but does not form a low beam light pattern.

[0030] Optionally, the first reflective focusing structure, the first total reflection surface structure and the thick-walled light output structure are an integrally formed structure.

[0031] Optionally, the second reflective light-concentrating structure, the second total reflection surface structure and the thick-walled light-emitting structure are an integrally formed structure.

[0032] Optionally, the first reflective light-concentrating structure, the first total reflection surface structure, the second reflective light-concentrating structure, the second total reflection surface structure and the thick-walled light-emitting structure are an integrated structure;

[0033] The first total reflection surface and the third total reflection surface are combined into a complete smooth plane or curved surface;

[0034] The second total reflection surface and the fourth total reflection surface are arranged side by side along the third direction;

[0035] The first reflective bowl surface and the second reflective bowl surface are arranged side by side along the third direction;

[0036] The first light incident surface and the second light incident surface are combined into a complete smooth plane or curved surface.

[0037] Optionally, the second reflective focusing structure includes two second reflective bowl surfaces, the two second reflective bowl surfaces are adjacently arranged in parallel along the third direction, and the two second reflective bowl surfaces are symmetrically arranged along the first direction.

[0038] Compared with the prior art, the above technical solution has the following advantages:

[0039] The low beam module provided in the embodiment of the present application includes a light source, a first optical structure and a thick-walled light-emitting structure arranged in sequence along a first direction, the surface of the thick-walled light-emitting structure away from the first optical structure is a light-emitting surface, and the side surface of the thick-walled light-emitting structure includes a first side surface and a second side surface arranged opposite to each other along a second direction, and the first direction and the second direction are perpendicular; a first groove extending along a third direction is arranged on the second side surface of the thick-walled light-emitting structure, the third direction is perpendicular to the first direction and the second direction, and the width of the bottom of the first groove along the first direction is set to be smaller than the width of the opening of the first groove along the first direction, at least one of the two side walls of the first groove includes a plurality of arc-shaped surfaces arranged along the third direction, so that the bottom and the two side walls of the first groove constitute a dimming structure, and then, after the light emitted by the light source passes through the first optical structure, a part of the light passes through the inside of the thick-walled light-emitting structure, and then is emitted from the light-emitting surface to form a low beam elbow cut-off line light type and / or a low beam widening light type, and another part of the light passes through the dimming structure, is diverged or converged by the plurality of arc-shaped surfaces along the third direction, and then is emitted from the light-emitting surface to form the illumination light of zone III above the low beam cut-off line.

[0040] It can be seen that the low beam module provided in the embodiment of the present application designs a dimming structure on the side of its thick-walled light-emitting structure rather than on the light-emitting surface, and uses the dimming structure to form the illumination light of zone III above the low beam cut-off line, so that the design of the light-emitting surface of the thick-walled light-emitting structure is more free, and the static appearance consistency is good, which can meet different styling requirements; and, the light incident on the side of the thick-walled light-emitting structure is usually stray light. By converting part of the stray light into the illumination light of zone III above the low beam cut-off line through the dimming structure located on the side of the thick-walled light-emitting structure, the optical efficiency of the low beam module can also be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] 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.

[0042] Figure 1 A schematic side view of a low beam module provided in an embodiment of the present application;

[0043] Figure 2 A partially enlarged schematic diagram of the second side surface of the thick-walled light output structure in the low beam module provided in an embodiment of the present application;

[0044] Figure 3 A partially enlarged schematic diagram of a low beam module provided in an embodiment of the present application, viewed from the inside of the thick-walled light emitting structure toward the second side surface thereof;

[0045] Figure 4 Schematic diagram of light passing through a thick-walled light-emitting structure;

[0046] Figure 5 It is a top view schematic diagram of the thickness light emitting structure;

[0047] Figure 6 It is a partially enlarged schematic diagram of the light guide tooth structure on the second side surface of the thick-walled light output structure;

[0048] Figure 7 A top perspective schematic diagram of a low beam module provided in an embodiment of the present application;

[0049] Figure 8 A schematic side view of a first total reflection surface structure and a thick-walled light output structure in a low beam module provided in an embodiment of the present application;

[0050] Fig. 9 A bottom-up schematic diagram of a first total reflection surface structure and a thick-walled light output structure in a low beam module provided in an embodiment of the present application;

[0051] Fig.10 A top perspective schematic diagram of another low beam module provided in an embodiment of the present application;

[0052] Fig.11 A schematic side view of the second total reflection surface structure and the thick-walled light output structure in another low beam module provided in an embodiment of the present application;

[0053] Fig.12 A bottom-up schematic diagram of a second total reflection surface structure and a thick-walled light output structure in a low beam module provided in an embodiment of the present application;

[0054] Fig.13 A top perspective schematic diagram of another low beam module provided in an embodiment of the present application;

[0055] Fig.14 A schematic side view of a main light tracing of a low beam module provided in an embodiment of the present application;

[0056] Fig.15 A schematic side view of a light tracing near a cutoff line of a low beam module provided in an embodiment of the present application;

[0057] Fig.16 A schematic top view of a low beam module provided in an embodiment of the present application, showing light rays near a low beam elbow cutoff line;

[0058] Fig.17 A schematic top view of a low beam widening light ray tracing of a low beam module provided in an embodiment of the present application;

[0059] Fig.18 A schematic side view of a low beam module provided in this embodiment forming a light ray tracing light of zone III above the low beam cut-off line;

[0060] Fig.19 A schematic side view of a stray light trace of a low beam module provided in an embodiment of the present application;

[0061] Fig. 20 A lighting effect diagram of a low beam elbow cut-off line light pattern formed by a low beam module provided in an embodiment of the present application;

[0062] Fig.21 A lighting effect diagram of a low beam widening light pattern formed by a low beam module provided in an embodiment of the present application;

[0063] Fig. 22 A complete low beam light pattern lighting effect diagram is provided for a low beam module formed by an elbow-shaped cut-off line light pattern and a low beam widening light pattern.

[0064] Reference numerals:

[0065] 100-light source; 200-first optical structure; 300-thick-wall light-emitting structure; 310-light-emitting surface; 320-first side surface; 330-second side surface; U1-first groove; T1-dimming structure; S1-sub-arc surface; T2-light-guiding tooth structure; T21-first tooth surface; T22-second tooth surface; T23-virtual surface; 210-first reflective focusing structure; 211-first light-entering surface; 212-first reflective bowl surface; 213 -first cutoff surface; 220-first total reflection surface structure; 221-first total reflection surface; 222-second total reflection surface; 230-second reflection focusing structure; 231-second light incident surface; 232-second reflection bowl surface; 233-first cutoff surface; 240-second total reflection surface structure; 241-third total reflection surface; 242-second total reflection surface; F-first focus; FF-first focal line; U2-second groove; T3-dimming structure. DETAILED DESCRIPTION

[0066] 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.

[0067] 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.

[0068] Secondly, the present application is described in detail with reference to the schematic diagram. When describing the embodiments of the present application in detail, for the sake of convenience, the cross-sectional diagrams showing the device 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.

[0069] As described in the background technology section, the lighting design of low beam zone III is crucial to safe driving, but currently the optical structure that forms the illumination light of zone III above the low beam cutoff line is generally designed on the light emitting surface of the optical element, which affects the appearance of the optical element.

[0070] In view of this, an embodiment of the present application provides a low beam module. Figure 1 FIG. 4 shows a side view schematic diagram of a low beam module provided in an embodiment of the present application, such as Figure 1 As shown, the low beam module includes a light source 100, a first optical structure 200 and a thick-walled light emitting structure 300 which are sequentially arranged along a first direction X. The thick-walled light emitting structure 300 has a certain thickness along the first direction X. The surface of the thick-walled light emitting structure 300 which is away from the first optical structure 200 is a light emitting surface 310. The side surfaces of the thick-walled light emitting structure 300 include a first side surface 320 and a second side surface 330 which are relatively arranged along a second direction Y. The first direction X and the second direction Y are perpendicular.

[0071] like Figure 1 As shown, the second side surface 330 of the thick-walled light output structure 300 is provided with a first groove U1 extending along a third direction Z, the third direction Z is perpendicular to the first direction X, and perpendicular to the second direction Y, the first direction X, the second direction Y and the third direction Z constitute a three-dimensional coordinate system, wherein the plane formed by the first direction X and the third direction Z is a horizontal plane, the second direction Y is a longitudinal direction, i.e., the longitudinal direction of the low beam light pattern, and the third direction Z is a lateral direction of the low beam light pattern.

[0072] In order to better understand this application, Figure 2 FIG. 1 shows a partially enlarged schematic diagram of a second side surface 330 of a thick-walled light-emitting structure 300 in a low beam module provided in an embodiment of the present application. Figure 2 As shown, the width w1 of the bottom of the first groove U1 along the first direction X is smaller than the width w2 of the opening of the first groove U1 along the first direction X. Thus, the two side walls C1 and C2 of the first groove U1 are both arc-shaped surfaces, and the bottom and two side walls of the first groove U1 constitute a dimming structure T1.

[0073] Figure 3 A partial enlarged schematic diagram of the thick-walled light-emitting structure 300 viewed from the inside toward the second side surface 330 is further shown, as shown in FIG. Figure 3 As shown, at least one of the two side walls of the first groove U1 includes a plurality of sub-arc surfaces S1 arranged along the third direction Z, that is, an optical pattern arranged along the third direction Z. In other words, the side wall C1 of the first groove U1 includes a plurality of sub-arc surfaces S1 arranged along the third direction Z, or the side wall C2 of the first groove U1 includes a plurality of sub-arc surfaces S1 arranged along the third direction Z, or both the side walls C1 and C2 of the first groove U1 include a plurality of sub-arc surfaces S1 arranged along the third direction Z; the sub-arc surfaces S1 are arc-shaped along the second direction Y and are arranged along the third direction Z.

[0074] So set up, refer to Figure 4 A schematic diagram of light passing through the thick-walled light-emitting structure 300 is shown, and Figure 2 As shown in the schematic diagram of light passing through the thick-walled light-emitting structure 300, it can be understood that after the light emitted by the light source 100 passes through the first optical structure 200, a part of the light passes through the inside of the thick-walled light-emitting structure 300, and then is emitted from the light-emitting surface 310 to form a low-beam elbow cutoff line light type and / or a low-beam widening light type; another part of the light passes through the dimming structure T1, is diverged or converged by multiple sub-arc surfaces S1 along the third direction Z, and then is emitted from the light-emitting surface 310 to form the illumination light of zone III above the low-beam cutoff line. Specifically, as Figure 2 As shown, the light incident on the dimming structure T1, for example, the light incident on the side wall C1 of the first groove U1, is refracted by the side wall C1 of the first groove U1, passes through the first groove U1, and is then refracted by the side wall C2 of the first groove U1, thereby forming the illumination light of zone III above the low beam cut-off line.

[0075] It should be noted that the present application does not limit the specific structure of the first optical structure 300. Considering that the illumination light of zone III above the low beam cut-off line is relatively weak, if the light emitted by the light source 100 passes through the first optical structure 200 and reaches the dimming structure T1, the curvature of the two side walls C1 and C2 of the first groove U1 and the curvature of the multiple sub-arc surfaces S1 can be set so that the multiple sub-arc surfaces S1 diverge the incident light along the third direction Z (i.e., transverse direction), thereby forming the illumination light of zone III above the low beam cut-off line; if the light emitted by the light source 100 passes through the first optical structure 200 and reaches the dimming structure T1, the curvature of the two side walls C1 and C2 of the first groove U1 and the curvature of the multiple sub-arc surfaces S1 can be set so that the multiple sub-arc surfaces S1 converge the incident light along the third direction Z (i.e., transverse direction), thereby forming the illumination light of zone III above the low beam cut-off line.

[0076] Optionally, the curvature radius of the side wall C1 and the side wall C2 of the first groove Y1 is less than 10 mm; the spacing of the sub-arc-shaped surfaces S1 arranged along the third direction Z on the side wall C1 and / or the side wall C2 of the first groove Y1 can be 1 mm, and the curvature radius of the sub-arc-shaped surfaces S1 can be 2 mm. However, this application does not limit these, and the curvature radius of the side wall C1 and the side wall C2 of the first groove Y1, as well as the spacing and curvature radius of the sub-arc-shaped surfaces S1 arranged along the third direction Z on the side wall C1 and / or the side wall C2 of the first groove Y1 can be set according to actual conditions.

[0077] It can be seen that the low beam module provided in the embodiment of the present application, by designing the dimming structure T1 on the second side surface 320 of the thick-walled light-emitting structure 300 instead of the light-emitting surface 310, uses the dimming structure T1 to form the illumination light of zone III above the low beam cutoff line, so that the light-emitting surface design of the thick-walled light-emitting structure 300 is more free, the static appearance consistency is good, and different modeling requirements can be met. In addition, the light incident on the side of the thick-walled light-emitting structure 300 is usually stray light. The dimming structure T1 located on the second side surface 320 of the thick-walled light-emitting structure 300 converts part of the stray light into the illumination light of zone III above the low beam cutoff line, which can also improve the optical efficiency of the low beam module.

[0078] As is known above, the light incident on the side of the thick-walled light-emitting structure 300 is usually stray light. Based on this, it is optional, such as Figure 1-Figure 4 As shown, combined with Figure 5 From the top view of the thick-walled light-emitting structure 300 shown in FIG. 1 , it can be seen that the first side surface 320 and the second side surface 330 of the thick-walled light-emitting structure 300 are provided with a plurality of light-guiding tooth structures T2 arranged along the first direction X and extending along the third direction Z, and the light-guiding tooth structures T2 protrude in a direction away from the thick-walled light-emitting structure 300. That is to say, taking the first side surface 320 of the thick-walled light-emitting structure 300 as an example, the light-guiding tooth structures T2 on the first side surface 320 of the thick-walled light-emitting structure 300 protrude upward, and similarly, the light-guiding tooth structures T2 on the second side surface 330 of the thick-walled light-emitting structure 300 protrude downward. Figure 2 and Figure 3 The light guiding tooth structure T2 located on the second side surface 330 of the thick-walled light output structure 300 can be seen more clearly.

[0079] like Figure 2 and Figure 3 As shown, the light guide tooth structure T2 extends along the third direction Z and is arranged along the first direction X. The light guide tooth structure T2 is a triangular pyramid. In order to better understand the light guide tooth structure T2, Figure 6A partially enlarged schematic diagram of the light-guiding tooth structure T2 on the second side surface 330 of the thick-walled light-emitting structure 300 is further shown. It can be seen that the light-guiding tooth structure T2 includes a first tooth surface T21, a second tooth surface T22, and a virtual surface T23 connecting the first tooth surface T21 and the second tooth surface T22. It can be understood that the first tooth surface T21 and the second tooth surface T22 can be seen from the first side surface 320 and the second side surface 330 of the thick-walled light-emitting structure 300, but the virtual surface T23 does not actually exist, because the light-guiding tooth structure T2 and the thick-walled light-emitting structure 300 are an integrally formed structure. For the sake of convenience of expression, the virtual surface T23 is defined as connecting the first tooth surface T21 and the second tooth surface T22. Therefore, the virtual surfaces T23 of each light-guiding tooth structure T2 located on the first side surface 320 are in the same plane, and the virtual surfaces T23 of each light-guiding tooth structure T2 located on the second side surface 330 are also in the same plane.

[0080] And, if Figure 6 As shown, in the light-guiding tooth structure T2, the first tooth surface T21 is located on the side of the second tooth surface T22 close to the light-emitting surface 310, and the angle θ1 between the first tooth surface T21 and the virtual surface T23 is greater than the angle θ2 between the second tooth surface T22 and the virtual surface T23. With this arrangement, when the incident light reaches the first tooth surface T21 from the inside of the thick-walled light-emitting structure 300, the light is refracted, and the refracted light continues to be transmitted to the second tooth surface T22, and the incident angle is large. When the incident angle is greater than the critical angle, it is totally reflected at the second tooth surface T22, thereby dissipating part of the stray light; when the incident light reaches the second tooth surface T21 from the inside of the thick-walled light-emitting structure 300, the incident angle is large. When the incident angle is greater than the critical angle, it will be totally reflected at the second tooth surface T21, thereby dissipating part of the stray light; when the incident light reaches the second tooth surface T21 from the inside of the thick-walled light-emitting structure 300, the incident angle is large. When the incident angle is greater than the critical angle, it will be totally reflected at the second tooth surface T21, thereby Part of the stray light is reflected toward the inside of the thick-walled light emitting structure 300, and may subsequently be emitted from the light emitting surface 100 as part of the low-beam light type, or dissipated from the light emitting surface 100, or may be reflected to the other side of the thick-walled light emitting structure 300, and continue to be reflected or refracted by the light-guiding tooth structure T2 on the other side; in short, the stray light emitted from the inside of the thick-walled light emitting structure 300 to the side of the thick-walled light emitting structure 300, except for the light reaching the dimming structure T1 to form the illumination light of zone III above the low-beam cut-off line, other stray light can be dissipated by the light-guiding tooth structure T2, and the light dissipated by the light-guiding tooth structure T2 is further reflected and refracted for multiple times, and the energy is continuously reduced, and its illumination and intensity values ​​are reduced to a range invisible to the human eye, thereby avoiding affecting the low-beam light type.

[0081] In addition, the light-guiding tooth structure T2 protrudes in a direction away from the thick-walled light-emitting structure 300 , and will not affect the main light passing through the inside of the thick-walled light-emitting structure 300 .

[0082] In practical applications, the material of the thick-walled light output structure 300 can be PMMA (polymethyl methacrylate) or PC (polycarbonate). Based on this, optionally, in the light guide tooth structure T2, the angle θ1 between the first tooth surface T21 and the virtual surface T23 can satisfy: 51°<θ1<90°, and the angle θ2 between the second tooth surface T22 and the virtual surface T23 can satisfy: 5°<θ2<39°, so that the light guide tooth structure T2 can fully dissipate the incident stray light according to the above analysis process.

[0083] As is known above, after the light emitted by the light source 100 passes through the first optical structure 200, a portion of the light passes through the interior of the thick-walled light emitting structure 300 and then is emitted from the light emitting surface 310 to form a low beam elbow cutoff line light pattern and / or a low beam widening light pattern. Optionally, the low beam module is used to form a low beam elbow cutoff line light pattern, such as Figure 1 As shown, the first optical structure 200 includes a first reflective light-condensing structure 210 and a first total reflection surface structure 220 which are sequentially arranged along a first direction X.

[0084] Figure 7 The schematic diagram of the perspective top view of the low beam module provided in this embodiment is further shown. Figure 1 and Figure 7 As shown, the first reflective light-focusing structure 210 includes a first light incident surface 211 and a first reflective bowl surface 212. The first light incident surface 211 is the surface of the first reflective light-focusing structure 210 that is away from the first total reflection surface structure 220, and the first reflective bowl surface 212 is deflected toward the first total reflection surface structure 220 relative to the first light incident surface 211; the first reflective light-focusing structure 210 also includes a first cut-off surface 213, and the first cut-off surface 213 connects the first light incident surface 211 and the first reflective bowl surface 212.

[0085] Combination Figure 1 and Figure 7 As shown, the first total reflection surface structure 220 includes a first total reflection surface 221 and a second total reflection surface 222 arranged relatively along the second direction Y, the first total reflection surface 221 is connected to the first side surface 320, and the second total reflection surface 222 is connected to the second side surface 330, that is, the first total reflection surface structure 220 and the thick-walled light output structure 300 are an integrally formed structure.

[0086] Figure 8 The figure further shows a side view schematic diagram of the first total reflection surface structure 220 and the thick-walled light output structure 300 in the low beam module provided in this embodiment. Fig. 9 The bottom view of the first total reflection surface structure 220 and the thick-walled light emitting structure 300 in the low beam module provided in this embodiment is further shown. Figure 8 and Fig. 9As shown, a beam of parallel light is incident from the light emitting surface 310, converged by the light emitting surface 310, and then reflected by the first total reflection surface 221 and the second total reflection surface 222 in sequence, and focused on the first focus F; and a distance L between the geometric center of the light emitting surface 310 and the first focus F along the first direction X is greater than a distance l between the second total reflection surface 222 and the first focus F along the first direction X, wherein the distance L between the geometric center of the light emitting surface 310 and the first focus F along the first direction X represents the longitudinal focal length, and the distance l between the second total reflection surface 222 and the first focus F along the first direction X represents the transverse focal length, that is, the longitudinal focal length is greater than the transverse focal length.

[0087] The light-emitting surface 310 is the outermost transparent molding surface of the low beam module, and can be a convex surface along the second direction Y (i.e., longitudinal direction), so as to facilitate focusing the parallel light incident from the light-emitting surface 310 along the second direction Y (i.e., longitudinal direction). The second total reflection surface 222 can be a concave surface along the third direction Z (i.e., transverse direction), so as to facilitate focusing the light beam after the parallel light incident from the light-emitting surface 310 is reflected by the first total reflection surface 221 along the third direction Z (i.e., transverse direction); the first total reflection surface 221 can be a curved surface or a flat surface, which is used to match the light-emitting surface 310 and the second total reflection surface 222, and also plays a role of partial focusing.

[0088] Combination Figure 1 and Figure 7 As shown, the light emitted by the light source 100 is incident from the first light incident surface 211, converged to the first reflection bowl surface 212 through the first light incident surface 211, reflected by the first reflection bowl surface 212, and then reflected by the second total reflection surface 222 and the first total reflection surface 221 in sequence, enters the thick-walled light output structure 310, and then is emitted from the light output surface 310. The shape of the first reflection bowl surface 212 is projected as a low-beam elbow cutoff line light type, and the edge of the first reflection bowl surface 212 close to the first light incident surface 211 is projected as the cutoff line of the low-beam elbow cutoff line light type.

[0089] Among them, the first light incident surface 211 mainly plays the role of collecting and focusing light; the first reflection bowl surface 212 is a total reflection free-form surface, which mainly plays the role of collecting and focusing light and forming a low-beam elbow cut-off line light type.

[0090] It should be noted that the first focus F is located on the edge of the first reflective bowl surface 212 close to the first light incident surface 211, and the edge of the first reflective bowl surface 212 close to the first light incident surface 211 is also the intersection line of the first reflective bowl surface 212 and the first cut-off surface 213. Since the light emitted by the light source 100 and converged to the first cut-off surface 213 through the first light incident surface 211 will not be reflected by the first cut-off surface 213, and the final emitted light is the light emitted by the light source 100 and converged to the first reflective bowl surface 212 through the first light incident surface 211 and reflected by the first reflective bowl surface 212, the shape of the first reflective bowl surface 212 is projected as a low-beam elbow cut-off line light type, and the edge of the first reflective bowl surface 212 close to the first light incident surface 213 (i.e., the intersection line of the first reflective bowl surface 212 and the first cut-off surface 213) is projected as the cut-off line of the low-beam elbow cut-off line light type.

[0091] It should also be noted that since the low beam elbow cut-off line light type is relatively concentrated in the low beam light type, the light emitted by the light source 100 is relatively concentrated after passing through the first optical structure 200 and reaching the dimming structure T1. Therefore, in this embodiment, the multiple sub-arc surfaces S1 in the dimming structure T1 diverge the incident light along the third direction Z (i.e., horizontally), thereby forming the III zone illumination light above the low beam cut-off line.

[0092] Compared with the existing low beam structure, the optical design of the existing low beam generally adopts a combination of four optical elements, namely, a light source, a reflector, a light baffle and a lens, to achieve the low beam effect. The reflector focuses the light emitted by the light source on one point, and the light baffle blocks the excess light to form a cutoff line. The lens then evenly distributes the light to form a low beam light pattern. This traditional low beam module has a complex internal structure, occupies a large space, has a large assembly tolerance, and is prone to forming an irregular light pattern. Since Fresnel reflection occurs at the interface when light passes through different media, this traditional low beam module has a large Fresnel loss and low optical efficiency. In addition, the lens opening size of this traditional low beam module is large, and the appearance consistency is poor.

[0093] In the low beam module provided by the present embodiment, the first total reflection surface structure 220 and the thick-walled light emitting structure 300 are an integrally formed structure, that is, the first total reflection surface structure 220 and the thick-walled light emitting structure 300 are combined into a single-layer projection lens structure, which effectively reduces 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; the projection focusing effect is mainly realized by the light emitting surface 310, the first total reflection surface 221 and the second total reflection surface 222, with less refraction, so that the dispersion of the projected light type is small and the color uniformity is good; and the longitudinal focal length is greater than the transverse focal length, which is convenient for realizing a low beam elbow cutoff line light that is wide in the transverse direction and narrow in the longitudinal direction. type, and is also beneficial to narrowing the opening size of the light emitting surface 310 along the second direction Y (i.e., longitudinal direction). For example, the opening size of the light emitting surface 310 along the second direction Y (i.e., longitudinal direction) can be about 10 mm; in addition, the light emitting surface 310 can be a complete free-form surface, and the first total reflection surface 221 can be a complete free-form surface or a plane, so that the static appearance of the lens has good consistency, which is beneficial to meet different modeling requirements such as horizontal long strip module modeling; the first total reflection surface structure 220 and the thick-walled light emitting structure 300 are combined into a single-layer projection lens structure, which can also reduce assembly tolerances, reduce costs, improve light type controllability, and avoid the problem of burns caused by focusing of multi-layer lenses due to access to sunlight.

[0094] Further optional, such as Figure 1 and Figure 7 As shown, the first reflective focusing structure 210, the first total reflection surface structure 220 and the thick-walled light emitting structure 300 are an integrally formed structure, that is, the first optical structure 100 and the thick-walled light emitting structure 300 are an integrally formed structure, which can further shorten the dimension chain, reduce the volume and weight of the lens, reduce the assembly tolerance, reduce the cost, further reduce the Fresnel loss, improve the optical efficiency, further reduce the dispersion, and improve the color uniformity.

[0095] As is known above, after the light emitted by the light source 100 passes through the first optical structure 200, a portion of the light passes through the interior of the thick-walled light-emitting structure 300 and then is emitted from the light-emitting surface 310 to form a low-beam elbow cutoff line light pattern and / or a low-beam widened light pattern. Alternatively, the low-beam module is used to form a low-beam widened light pattern, such as Figure 1 As shown, the first optical structure 200 includes a second reflective light-condensing structure 230 and a second total reflection surface structure 240 which are sequentially arranged along the first direction X.

[0096] Fig.10 The schematic diagram of the perspective top view of the low beam module provided in this embodiment is further shown. Figure 1 and Fig.10As shown, the second reflective light-focusing structure 230 includes a second light incident surface 231 and a second reflective bowl surface 232. The second light incident surface 231 is the surface of the second reflective light-focusing structure 230 that is away from the second total reflection surface structure 240, and the second reflective bowl surface 232 is deflected toward the second total reflection surface structure 240 relative to the second light incident surface 231; the second reflective light-focusing structure 230 also includes a second cut-off surface 233, and the second cut-off surface 233 connects the second light incident surface 231 and the second reflective bowl surface 232.

[0097] Combination Figure 1 and Fig.10 As shown, the second total reflection surface structure 240 includes a third total reflection surface 241 and a fourth total reflection surface 242 which are arranged relatively along the second direction Y, the third total reflection surface 241 is connected to the first side surface 320, and the fourth total reflection surface 242 is connected to the second side surface 330, that is, the second total reflection surface structure 240 and the thick-walled light output structure 300 are an integrally formed structure.

[0098] Fig.11 The figure further shows a side view schematic diagram of the second total reflection surface structure 240 and the thick-walled light output structure 300 in the low beam module provided in this embodiment. Fig.12 The bottom view of the second total reflection surface structure 240 and the thick-walled light emitting structure 300 in the low beam module provided in this embodiment is further shown. Fig.11 and Fig.12 As shown, a beam of parallel light is incident from the light emitting surface 310 , converged by the light emitting surface 310 , and then reflected by the third total reflection surface 241 and the fourth total reflection surface 242 in sequence, and converged on the first focal line FF.

[0099] Among them, as known above, the light-emitting surface 310 is the outermost transparent molding surface of the low beam module, and can be a convex surface along the second direction Y (i.e., longitudinal direction), so as to focus the parallel light incident from the light-emitting surface 310 along the second direction Y (i.e., longitudinal direction). The third total reflection surface 241 and the fourth total reflection surface 242 can be curved surfaces or flat surfaces, which are used to match the light-emitting surface 310, and also play the role of partial focusing and folding the light path. In other words, the single-layer projection lens structure formed by the first total reflection surface structure 220 and the thick-walled light-emitting structure 300 mainly realizes the longitudinal focusing of the parallel light incident from the light-emitting surface 310.

[0100] Combination Figure 1 and Fig.10As shown, the light emitted by the light source 300 is incident from the second light incident surface 231, converged to the second reflection bowl surface 232 through the second light incident surface 231, reflected by the second reflection bowl surface 232, and then reflected by the fourth total reflection surface 242 and the third total reflection surface 241 in sequence, enters the thick-walled light emitting structure 300, and then emits from the light emitting surface 310. The shape of the second reflection bowl surface 232 is projected as a low beam widened light type, and the edge of the second reflection bowl surface 232 close to the second light incident surface 231 is projected as the cutoff line of the low beam widened light type.

[0101] Among them, the second light incident surface 431 mainly plays the role of collecting and focusing light; the second reflection bowl surface 432 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.

[0102] It should be noted that the first focal line FF is located on the edge of the second reflective bowl surface 232 close to the second light incident surface 231, and the edge of the second reflective bowl surface 232 close to the second light incident surface 231 is also the intersection line of the second reflective bowl surface 232 and the second cut-off surface 233. Since the light emitted by the light source 100 and converged to the second cut-off surface 233 through the second light incident surface 231 will not be reflected by the second cut-off surface 233, and the final emitted light is the light emitted by the light source 100 and converged to the second reflective bowl surface 232 through the second light incident surface 231 and reflected by the second reflective bowl surface 232, the shape of the second reflective bowl surface 232 is projected as a low-beam widening light type, and the edge of the second reflective bowl surface 232 close to the second light incident surface 231 (i.e. the intersection line of the second reflective bowl surface 232 and the second cut-off surface 233) is projected as the cut-off line of the low-beam widening light type.

[0103] It should also be noted that since the low beam widening light pattern is relatively divergent in the low beam light pattern, the light emitted by the light source 100 is relatively divergent after passing through the first optical structure 200 and reaching the dimming structure T1. Therefore, in this embodiment, the multiple sub-arc surfaces S1 in the dimming structure T1 converge the incident light along the third direction Z (i.e., horizontally), thereby forming zone III illumination light above the low beam cut-off line.

[0104] As mentioned above, the single-layer projection lens structure formed by the first total reflection surface structure 220 and the thick-walled light-emitting structure 300 is mainly used to achieve longitudinal focusing, while the second reflection focusing structure 230 is mainly used to achieve transverse focusing, thereby achieving transverse and longitudinal focusing separation, and the longitudinal focusing is greater than the transverse focal length.

[0105] Compared with the existing low beam lamp structure, in the low beam module provided by this embodiment, the second total reflection surface structure 240 and the thick-walled light output structure 300 are an integrated structure, that is, the second total reflection surface structure 230 and the thick-walled light output structure 300 are combined into a single-layer projection lens structure, which effectively reduces 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; the projection focusing effect is mainly achieved by the light output surface 310, the third total reflection surface 241 and the second total reflection surface 242, with less refraction, so that the dispersion of the projected light type is small and the color uniformity is good; and the longitudinal focal length is greater than the transverse focal length, which is convenient for realizing a low beam that is wide in the transverse direction and narrow in the longitudinal direction Broadening the light pattern is also beneficial to narrowing the opening size of the light emitting surface 310 along the second direction Y (i.e., longitudinal direction). For example, the opening size of the light emitting surface 310 along the second direction Y (i.e., longitudinal direction) can be about 10 mm. In addition, the light emitting surface 310 can be a complete free-form surface, and the third total reflection surface 241 can be a complete free-form surface or a plane, so that the static appearance of the lens has good consistency, which is beneficial to meet different modeling requirements such as horizontal long strip module modeling. The second total reflection surface structure 240 and the thick-walled light emitting structure 300 are combined into a single-layer projection lens structure, which can also reduce assembly tolerances, reduce costs, improve the controllability of the light pattern, and avoid the problem of burns caused by focusing of multi-layer lenses due to the access to sunlight.

[0106] Further optional, such as Figure 1 and Figure 7 As shown, the second reflective focusing structure 230, the second total reflection surface structure 240 and the thick-walled light emitting structure 300 are an integrally formed structure, that is, the first optical structure 100 and the thick-walled light emitting structure 300 are an integrally formed structure, which can further shorten the dimension chain, reduce the volume and weight of the lens, reduce the assembly tolerance, reduce the cost, further reduce the Fresnel loss, improve the optical efficiency, further reduce the dispersion, and improve the color uniformity.

[0107] As is known above, after the light emitted by the light source 100 passes through the first optical structure 200, a portion of the light passes through the interior of the thick-walled light emitting structure 300 and then is emitted from the light emitting surface 310 to form a low beam elbow cutoff line light pattern and / or a low beam widened light pattern. Alternatively, the low beam module is used to simultaneously form a low beam elbow cutoff line light pattern and a low beam widened light pattern, such as Figure 1 As shown, the first optical structure 200 includes a first reflective light-gathering structure 210 and a first total-reflection surface structure 220 arranged in sequence along a first direction X, and a second reflective light-gathering structure 230 and a second total-reflection surface structure 240 arranged in sequence along the first direction X, the first reflective light-gathering structure 210 and the second reflective light-gathering structure 230 are arranged side by side along a third direction Z, and the first total-reflection surface structure 220 and the second total-reflection surface structure 240 are arranged side by side along the third direction Z.

[0108] Fig.13 The schematic diagram of the perspective top view of the low beam module provided in this embodiment is further shown. Figure 1 and Fig.13 As shown, the first reflective light-focusing structure 210 includes a first light incident surface 211 and a first reflective bowl surface 212. The first light incident surface 211 is the surface of the first reflective light-focusing structure 210 that is away from the first total reflection surface structure 220, and the first reflective bowl surface 212 is deflected toward the first total reflection surface structure 220 relative to the first light incident surface 211; the first reflective light-focusing structure 210 also includes a first cut-off surface 213, and the first cut-off surface 213 connects the first light incident surface 211 and the first reflective bowl surface 212.

[0109] Combination Figure 1 and Fig.13 As shown, the first total reflection surface structure 220 includes a first total reflection surface 221 and a second total reflection surface 222 arranged relatively along the second direction Y, the first total reflection surface 221 is connected to the first side surface 320, and the second total reflection surface 222 is connected to the second side surface 330, that is, the first total reflection surface structure 220 and the thick-walled light output structure 300 are an integrally formed structure.

[0110] In the low beam module provided in this embodiment, the side view schematic diagram of the first total reflection surface structure 220 and the thick-walled light output structure 300 is as follows: Figure 8 As shown, the bottom view diagram is as follows Fig. 9 As shown, Figure 8 and Fig. 9 As shown, a beam of parallel light is incident from the light emitting surface 310, converged by the light emitting surface 310, and then reflected by the first total reflection surface 221 and the second total reflection surface 222 in sequence, and focused on the first focus F; and a distance L between the geometric center of the light emitting surface 310 and the first focus F along the first direction X is greater than a distance l between the second total reflection surface 222 and the first focus F along the first direction X, wherein the distance L between the geometric center of the light emitting surface 310 and the first focus F along the first direction X represents the longitudinal focal length, and the distance l between the second total reflection surface 222 and the first focus F along the first direction X represents the transverse focal length, that is, the longitudinal focal length is greater than the transverse focal length.

[0111] The light-emitting surface 310 is the outermost transparent molding surface of the low beam module, and can be a convex surface along the second direction Y (i.e., longitudinal direction), so as to facilitate focusing the parallel light incident from the light-emitting surface 310 along the second direction Y (i.e., longitudinal direction). The second total reflection surface 222 can be a concave surface along the third direction Z (i.e., transverse direction), so as to facilitate focusing the light beam after the parallel light incident from the light-emitting surface 310 is reflected by the first total reflection surface 221 along the third direction Z (i.e., transverse direction); the first total reflection surface 221 can be a curved surface or a flat surface, which is used to match the light-emitting surface 310 and the second total reflection surface 222, and also plays a role of partial focusing.

[0112] Combination Figure 1 and Fig.13 As shown, the light emitted by the light source 100 is incident from the first light incident surface 211, converged to the first reflection bowl surface 212 through the first light incident surface 211, reflected by the first reflection bowl surface 212, and then reflected by the second total reflection surface 222 and the first total reflection surface 221 in sequence, enters the thick-walled light output structure 310, and then is emitted from the light output surface 310. The shape of the first reflection bowl surface 212 is projected as a low-beam elbow cutoff line light type, and the edge of the first reflection bowl surface 212 close to the first light incident surface 211 is projected as the cutoff line of the low-beam elbow cutoff line light type.

[0113] Among them, the first light incident surface 211 mainly plays the role of collecting and focusing light; the first reflection bowl surface 212 is a total reflection free-form surface, which mainly plays the role of collecting and focusing light and forming a low-beam elbow cut-off line light type.

[0114] It should be noted that the first focus F is located on the edge of the first reflective bowl surface 212 close to the first light incident surface 211, and the edge of the first reflective bowl surface 212 close to the first light incident surface 211 is also the intersection line of the first reflective bowl surface 212 and the first cut-off surface 213. Since the light emitted by the light source 100 and converged to the first cut-off surface 213 through the first light incident surface 211 will not be reflected by the first cut-off surface 213, and the final emitted light is the light emitted by the light source 100 and converged to the first reflective bowl surface 212 through the first light incident surface 211 and reflected by the first reflective bowl surface 212, the shape of the first reflective bowl surface 212 is projected as a low-beam elbow cut-off line light type, and the edge of the first reflective bowl surface 212 close to the first light incident surface 213 (i.e., the intersection line of the first reflective bowl surface 212 and the first cut-off surface 213) is projected as the cut-off line of the low-beam elbow cut-off line light type.

[0115] Combination Figure 1 and Fig.13 As shown, the second total reflection surface structure 240 includes a third total reflection surface 241 and a fourth total reflection surface 242 which are arranged relatively along the second direction Y, the third total reflection surface 241 is connected to the first side surface 320, and the fourth total reflection surface 242 is connected to the second side surface 330, that is, the second total reflection surface structure 240 and the thick-walled light output structure 300 are an integrally formed structure.

[0116] In the low beam module provided in this embodiment, the side view schematic diagram of the second total reflection surface structure 240 and the thick-walled light output structure 300 as a whole is as follows Fig.11 As shown, the bottom view diagram is as follows Fig.12 As shown, Fig.11 and Fig.12 As shown, a beam of parallel light is incident from the light emitting surface 310 , converged by the light emitting surface 310 , and then reflected by the third total reflection surface 241 and the fourth total reflection surface 242 in sequence, and converged on the first focal line FF.

[0117] Among them, as known above, the light-emitting surface 310 is the outermost transparent molding surface of the low beam module, and can be a convex surface along the second direction Y (i.e., longitudinal direction), so as to focus the parallel light incident from the light-emitting surface 310 along the second direction Y (i.e., longitudinal direction). The third total reflection surface 241 and the fourth total reflection surface 242 can be curved surfaces or flat surfaces, which are used to match the light-emitting surface 310, and also play the role of partial focusing and folding the light path. In other words, the single-layer projection lens structure formed by the first total reflection surface structure 220 and the thick-walled light-emitting structure 300 mainly realizes the longitudinal focusing of the parallel light incident from the light-emitting surface 310.

[0118] Combination Figure 1 and Fig.13 As shown, the light emitted by the light source 300 is incident from the second light incident surface 231, converged to the second reflection bowl surface 232 through the second light incident surface 231, reflected by the second reflection bowl surface 232, and then reflected by the fourth total reflection surface 242 and the third total reflection surface 241 in sequence, enters the thick-walled light emitting structure 300, and then emits from the light emitting surface 310. The shape of the second reflection bowl surface 232 is projected as a low beam widened light type, and the edge of the second reflection bowl surface 232 close to the second light incident surface 231 is projected as the cutoff line of the low beam widened light type.

[0119] Among them, the second light incident surface 431 mainly plays the role of collecting and focusing light; the second reflection bowl surface 432 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.

[0120] It should be noted that the first focal line FF is located on the edge of the second reflective bowl surface 232 close to the second light incident surface 231, and the edge of the second reflective bowl surface 232 close to the second light incident surface 231 is also the intersection line of the second reflective bowl surface 232 and the second cut-off surface 233. Since the light emitted by the light source 100 and converged to the second cut-off surface 233 through the second light incident surface 231 will not be reflected by the second cut-off surface 233, and the final emitted light is the light emitted by the light source 100 and converged to the second reflective bowl surface 232 through the second light incident surface 231 and reflected by the second reflective bowl surface 232, the shape of the second reflective bowl surface 232 is projected as a low-beam widening light type, and the edge of the second reflective bowl surface 232 close to the second light incident surface 231 (i.e. the intersection line of the second reflective bowl surface 232 and the second cut-off surface 233) is projected as the cut-off line of the low-beam widening light type.

[0121] As mentioned above, the single-layer projection lens structure formed by the first total reflection surface structure 220 and the thick-walled light-emitting structure 300 is mainly used to achieve longitudinal focusing, while the second reflection focusing structure 230 is mainly used to achieve transverse focusing, thereby achieving transverse and longitudinal focusing separation, and the longitudinal focusing is greater than the transverse focal length.

[0122] It can be understood that, in this embodiment, the first reflective focusing structure 210, the first total reflection surface structure 220 and the thick-walled light emitting structure 300 are combined into a low beam elbow lens module unit for forming a low beam elbow cutoff line light type; the second reflective focusing structure 230, the second total reflection surface structure 240 and the thick-walled light emitting structure 300 are combined into a low beam widening lens module unit for forming a low beam widening light type; the low beam module may include one or more low beam elbow lens module units, and may also include one or more low beam widening lens module units. In addition, the first total reflection surface structure 220 and the thick-walled light emitting structure 300 are an integrally formed structure, and the second total reflection surface structure 240 and the thick-walled light emitting structure 300 are also an integrally formed structure, that is, the first total reflection surface structure 220, the second total reflection surface structure 240 and the thick-walled light emitting structure 300 are integrally formed as a whole, so that the first total reflection surface 221 and the third total reflection surface 241 can be combined into a complete smooth plane or curved surface, so that the static appearance of the lens is consistent.

[0123] Compared with the existing low beam lamp structure, in the low beam module provided by the present embodiment, the first total reflection surface structure 220 and the thick-walled light emitting structure 300 are an integrally formed structure, and the second total reflection surface structure 240 and the thick-walled light emitting structure 300 are also an integrally formed structure, that is, the first total reflection surface structure 220 and the thick-walled light emitting structure 300 are combined into a single-layer projection lens structure, and the second total reflection surface structure 240 and the thick-walled light emitting structure 300 are also combined into a single-layer projection lens structure, which effectively reduces 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; the projection focusing effect is mainly achieved by the light emitting surface 310, the first total reflection surface 221 / the third total reflection surface 241, the second total reflection surface 222 and the fourth total reflection surface 242, with less refraction, so that the dispersion of the projected light type is small and the color uniformity is good; and the longitudinal focus The distance 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 for narrowing the opening size of the light-emitting surface 310 along the second direction Y (i.e., the longitudinal direction). For example, the opening size of the light-emitting surface 310 along the second direction Y (i.e., the longitudinal direction) can be about 10 mm; in addition, the light-emitting surface 310 can be a complete free-form surface, and the first total reflection surface 221 / the third total reflection surface 241 can be a complete free-form surface or a plane, so that the static appearance of the lens has good consistency, which is beneficial for meeting different modeling requirements such as transverse long strip module modeling; the first total reflection surface structure 220 and the thick-walled light-emitting structure 300 are combined into a single-layer projection lens structure, and the second total reflection surface structure 240 and the thick-walled light-emitting structure 300 are also combined into a single-layer projection lens structure, which can also reduce assembly tolerances, reduce costs, improve light type controllability, and avoid the problem of burns caused by focusing of multi-layer lenses due to access to sunlight.

[0124] It should be noted that since the low beam elbow cut-off line light type is relatively concentrated in the low beam light type, the light emitted by the light source 100 is relatively concentrated after passing through the first optical structure 200 and reaching the dimming structure T1. Therefore, in this embodiment, the multiple sub-arc surfaces S1 in the dimming structure T1 diverge the incident light along the third direction Z (i.e., horizontally), thereby forming the III zone illumination light above the low beam cut-off line.

[0125] Further optional, such as Figure 1 and Fig.13 As shown, the first reflective light-concentrating structure 210, the first total reflection surface structure 220, the second reflective light-concentrating structure 230, the second total reflection surface structure 240 and the thick-walled light-emitting structure 300 are an integrally formed structure, and the first reflective light-concentrating structure 210 and the second reflective light-concentrating structure 230 are arranged in parallel along the third direction Z. In this embodiment, the first total reflection surface 221 and the third total reflection surface 241 can be combined into a complete smooth plane or curved surface; the second total reflection surface 222 and the fourth total reflection surface 242 are arranged in parallel along the third direction Z; the first reflective bowl surface 212 and the second reflective bowl surface 232 are arranged in parallel along the third direction Z; the first light incident surface 211 and the second light incident surface 231 are arranged in parallel along the third direction Z, and optionally, the first light incident surface 211 and the second light incident surface 231 can also be combined into a complete smooth plane or curved surface. Such an arrangement can further shorten the dimension chain, reduce the volume and weight of the lens, reduce the assembly tolerance, reduce the cost, further reduce the Fresnel loss, improve the optical efficiency, further reduce the dispersion, and improve the color uniformity.

[0126] In order to better understand this application, Fig.14 The schematic diagram of the main light tracing side view of the low beam module provided in this embodiment is shown. Fig.15 FIG. 1 shows a schematic side view of light tracing near the cutoff line of the low beam module provided in this embodiment, Fig.16 A schematic top view of the light tracing near the low beam elbow cut-off line of the low beam module provided in this embodiment is shown, Fig.17 A schematic top view of the low beam widening light ray tracing of the low beam module provided in this embodiment is shown, Fig.18 A schematic side view of the light tracing of the low beam module provided in this embodiment to illuminate the zone III above the low beam cut-off line is shown.

[0127] Optional, such as Fig.10 and Fig.13 As shown, the second reflective focusing structure 230 includes two second reflective bowl surfaces 232, and the two second reflective bowl surfaces 232 are arranged adjacent to each other in parallel along the third direction Z, and the two second reflective bowl surfaces 232 are arranged symmetrically along the first direction X, and the two second reflective bowl surfaces 232 correspond to the same second total reflection surface structure 240, that is, correspond to the same third total reflection surface 241 and the same fourth total reflection surface 242.

[0128] So set up, such as Fig.17 As shown, the light emitted through the two second reflection bowl surfaces 232 is cross-distributed along the third direction Z (transverse), that is, along the third direction Z (transverse), the light emitted from the left second reflection bowl surface 232 is distributed in the right half, and the light emitted from the right second reflection bowl surface 232 is distributed in the left half, which is beneficial to expand the emitted light pattern along the third direction Z (i.e., transverse).

[0129] Alternatively, there may be only one second reflective bowl surface 232 , and a widened light pattern of the emitted low beam may be achieved by adjusting the shape of the second reflective bowl surface 232 .

[0130] On the basis of any of the above embodiments, since the first total reflection surface 221 and the second total reflection surface 222 are arranged relatively to each other along the second direction Y, part of the light reflected from the first reflection bowl surface 212 may reach the vicinity of the second side surface 330 of the thick-walled light emitting structure 300 without passing through the second total reflection surface 222 and the first total reflection surface 221, or, part of the light reflected from the first reflection bowl surface 212 may reach the vicinity of the second side surface 330 of the thick-walled light emitting structure 300 even if it passes through the second total reflection surface 222 and the first total reflection surface 221, and the light reaching the vicinity of the second side surface 330 of the thick-walled light emitting structure 300 does not contribute to the low beam light pattern and can be considered as stray light. Although the dimming structure T1 has been used in the aforementioned embodiment to convert part of the stray light reaching the second side surface 330 of the thick-walled light emitting structure 300 into the illumination light of zone III above the low-beam cut-off line, and the light-guiding tooth structure T2 has been used to dissipate the stray light reaching the two sides of the thick-walled light emitting structure 300, it may still be insufficient to completely dissipate the stray light reaching the second side surface 330 of the thick-walled light emitting structure 300.

[0131] Based on this, further optional, such as Figure 1-Figure 3 As shown, the second side surface 330 of the thick-walled light output structure 300 is also provided with a second groove U2 extending along the third direction Z. The second groove U2 is located on the side of the first groove U1 close to the first optical structure 100. The width w3 of the bottom of the second groove U1 along the first direction X is smaller than the width w4 of the opening of the second groove U2 along the first direction X. In this way, the two side walls C3 and C4 of the second groove U2 are both arc-shaped surfaces, and the bottom of the second groove U2 and the two side walls C3 and C4 constitute a light-blocking structure T3.

[0132] Optionally, the curvature radius of the two side walls C3 and C4 of the second groove U2 is less than 10 mm, but the present application does not limit this, and the curvature radius of the two side walls C3 and C4 of the second groove U2 can be set according to actual conditions.

[0133] Fig.19A schematic side view of the light tracing of the stray light of the low beam module provided in this embodiment is shown. It can be seen that after the light emitted by the light source 100 passes through the first optical structure 200, part of the light reaches the light blocking structure T2, and part of the light passing through the light blocking structure T2 reaches the dimming structure T1 to form the illumination light of zone III above the low beam cut-off line; another part of the light reaches the light guiding tooth structure T2 to be dissipated by the light guiding tooth structure T2; and another part of the light reaches the light emitting surface 310, but does not form a low beam light pattern, but is refracted by the light emitting surface 310 to an area with a higher light pattern, which is not within the angle range visible to the human eye.

[0134] like Figure 2 As shown, the spacing between the dimming structure T1 and the light blocking structure T2 along the first direction X is S. The inventors have found that when S decreases, the intensity of the light irradiated in zone III above the low beam cut-off line is weakened, and when S increases, the intensity of the light irradiated in zone III above the low beam cut-off line is increased. S can be set according to actual needs.

[0135] Fig. 20 The figure shows a lighting effect diagram of a low beam elbow cut-off line light pattern formed by a low beam module provided in an embodiment of the present application. Fig.21 A lighting effect diagram of a low beam widening light pattern formed by a low beam module provided in an embodiment of the present application is shown. Fig. 22 A lighting effect diagram of a complete low beam light pattern formed by a low beam elbow cutoff line light pattern formed by a low beam module provided in an embodiment of the present application and a low beam widening light pattern is shown.

[0136] 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.

[0137] 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 module, characterized in that: It comprises a light source, a first optical structure and a thick-walled light-emitting structure arranged in sequence along a first direction, wherein the surface of the thick-walled light-emitting structure away from the first optical structure is a light-emitting surface, and the side surfaces of the thick-walled light-emitting structure comprise a first side surface and a second side surface arranged opposite to each other along a second direction, and the first direction is perpendicular to the second direction; The second side surface is provided with a first groove extending along a third direction, the third direction is perpendicular to the first direction and perpendicular to the second direction; the width of the bottom of the first groove along the first direction is smaller than the width of the opening of the first groove along the first direction, both side walls of the first groove are arc-shaped surfaces, the bottom and the two side walls of the first groove constitute a dimming structure, and at least one of the two side walls of the first groove includes a plurality of sub-arc-shaped surfaces arranged along the third direction; After the light emitted by the light source passes through the first optical structure, a part of the light passes through the interior of the thick-walled light output structure, and then is emitted from the light output surface to form a low-beam elbow cutoff line light type and / or a low-beam widened light type; another part of the light passes through the dimming structure, is diverged or converged along the third direction by the multiple sub-arc surfaces, and then is emitted from the light output surface to form zone III illumination light above the low-beam cutoff line.

2. The low beam module according to claim 1, characterized in that: The first side surface and the second side surface are provided with a plurality of light guide tooth structures arranged along the first direction and extending along the third direction, and the light guide tooth structures protrude in a direction away from the thick-walled light output structure; The light-guiding tooth structure is in the shape of a triangular cone, and includes a first tooth surface, a second tooth surface, and a virtual surface connecting the first tooth surface and the second tooth surface. The virtual surfaces of the light-guiding tooth structures located on the first side surface are in the same plane, and the virtual surfaces of the light-guiding tooth structures located on the second side surface are in the same plane. The first tooth surface is located on the side of the second tooth surface close to the light-emitting surface, and the angle between the first tooth surface and the virtual surface is greater than the angle between the second tooth surface and the virtual surface.

3. The low beam module according to claim 2, characterized in that: The included angle θ1 between the first tooth surface and the virtual surface satisfies: 51°<θ1<90°; An included angle θ2 between the second tooth surface and the virtual surface satisfies: 5°<θ2<39°.

4. The low beam module according to claim 2, characterized in that: The first optical structure includes a first reflective light-condensing structure and a first total reflection surface structure sequentially arranged along the first direction; The first reflective light-concentrating structure comprises a first light-incident surface and a first reflective bowl surface, the first light-incident surface is a surface of the first reflective light-concentrating structure facing away from the first total reflection surface structure, and the first reflective bowl surface is deflected relative to the first light-incident surface to the first total reflection surface structure; The first total reflection surface structure comprises a first total reflection surface and a second total reflection surface which are arranged opposite to each other along the second direction, the first total reflection surface is connected to the first side surface, and the second total reflection surface is connected to the second side surface; a beam of parallel light is incident from the light emitting surface, converged by the light emitting surface, and then reflected by the first total reflection surface and the second total reflection surface in sequence, and focused on a first focus, and the first focus is located on the edge of the first reflection bowl surface close to the first light incident surface; The light emitted by the light source is incident from the first light incident surface, converged to the first reflective bowl surface through the first light incident surface, reflected by the first reflective bowl surface, and then reflected by the second total reflection surface and the first total reflection surface in sequence, enters the thick-walled light output structure, and then exits from the light output surface, the shape of the first reflective bowl surface is projected as a low-beam elbow cut-off line light type, the edge of the first reflective bowl surface close to the first light incident surface is projected as the cut-off line of the low-beam elbow cut-off line light type, and the multiple sub-arc surfaces in the dimming structure diverge along the third direction with respect to the incident light.

5. The low beam module according to claim 2, characterized in that: The first optical structure includes a second reflective light-condensing structure and a second total reflection surface structure sequentially arranged along the first direction; The second reflective light-concentrating structure comprises a second light-incident surface and a second reflective bowl surface, the second light-incident surface is a surface of the second reflective light-concentrating structure away from the second total reflection surface structure, and the second reflective bowl surface is deflected relative to the second light-incident surface to the second total reflection surface structure; The second total reflection surface structure comprises a third total reflection surface and a fourth total reflection surface which are arranged opposite to each other along the second direction, the third total reflection surface is connected to the first side surface, and the fourth total reflection surface is connected to the second side surface; a beam of parallel light is incident from the light emitting surface, converges through the light emitting surface, and then is reflected through the third total reflection surface and the fourth total reflection surface in sequence, and converges on a first focal line, and the first focal line is located on the edge of the second reflection bowl surface close to the second light incident surface; The light emitted by the 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 fourth total reflection surface and the third total reflection surface in sequence, enters the thick-walled light output structure, and then exits from the light output 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 a cutoff line of the low-beam widened light type. The multiple sub-arc surfaces in the dimming structure converge the incident light along the third direction.

6. The low beam module according to claim 2, characterized in that: The first optical structure includes a first reflective light-gathering structure and a first total reflection surface structure sequentially arranged along the first direction, and a second reflective light-gathering structure and a second total reflection surface structure sequentially arranged along the first direction; The first reflective light-concentrating structure comprises a first light-incident surface and a first reflective bowl surface, the first light-incident surface is a surface of the first reflective light-concentrating structure facing away from the first total reflection surface structure, and the first reflective bowl surface is deflected relative to the first light-incident surface to the first total reflection surface structure; The first total reflection surface structure comprises a first total reflection surface and a second total reflection surface which are arranged opposite to each other along the second direction, the first total reflection surface is connected to the first side surface, and the second total reflection surface is connected to the second side surface; a beam of parallel light is incident from the light emitting surface, converged by the light emitting surface, and then reflected by the first total reflection surface and the second total reflection surface in sequence, and focused on a first focus, and the first focus is located on the edge of the first reflection bowl surface close to the first light incident surface; The light emitted by the light source is incident from the first light incident surface, converged to the first reflective bowl surface through the first light incident surface, reflected by the first reflective bowl surface, and then reflected by the second total reflection surface and the first total reflection surface in sequence, enters the thick-walled light output structure, and then exits from the light output surface, the shape of the first reflective bowl surface is projected as a low-beam elbow cut-off line light type, the edge of the first reflective bowl surface close to the first light incident surface is projected as the cut-off line of the low-beam elbow cut-off line light type, and the multiple sub-arc surfaces in the dimming structure diverge along the third direction with respect to the incident light; The second reflective light-concentrating structure comprises a second light-incident surface and a second reflective bowl surface, the second light-incident surface is a surface of the second reflective light-concentrating structure away from the second total reflection surface structure, and the second reflective bowl surface is deflected relative to the second light-incident surface to the second total reflection surface structure; The second total reflection surface structure comprises a third total reflection surface and a fourth total reflection surface which are arranged opposite to each other along the second direction, the third total reflection surface is connected to the first side surface, and the fourth total reflection surface is connected to the second side surface; a beam of parallel light is incident from the light emitting surface, converges through the light emitting surface, and then is reflected through the third total reflection surface and the fourth total reflection surface in sequence, and converges on a first focal line, and the first focal line is located on the edge of the second reflection bowl surface close to the second light incident surface; The light emitted by the 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 fourth total reflection surface and the third total reflection surface in sequence, enters the thick-walled light output structure, and then is emitted from the light output 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 a cutoff line of the low-beam widened light type.

7. The low beam module according to any one of claims 4 to 6, characterized in that: The second side surface is further provided with a second groove extending along the third direction, the second groove is located on a side of the first groove close to the first optical structure, the width of the bottom of the second groove along the first direction is smaller than the width of the opening of the second groove along the first direction, and the bottom and two side walls of the second groove constitute a light blocking structure; After the light emitted by the light source passes through the first optical structure, part of the light reaches the light blocking structure, part of the light passing through the light blocking structure reaches the dimming structure, another part of the light reaches the light guide tooth structure, and another part of the light reaches the light emitting surface, but does not form a low beam light pattern.

8. The low beam module according to claim 4 or 6, characterized in that: The first reflective light-condensing structure, the first total reflection surface structure and the thick-walled light-emitting structure are an integrally formed structure.

9. The low beam module according to claim 5 or 6, characterized in that: The second reflective light-concentrating structure, the second total reflection surface structure and the thick-walled light-emitting structure are an integrally formed structure.

10. The low beam module according to claim 6, characterized in that: The first reflective light-concentrating structure, the first total reflection surface structure, the second reflective light-concentrating structure, the second total reflection surface structure and the thick-walled light-emitting structure are an integrated structure; The first total reflection surface and the third total reflection surface are combined into a complete smooth plane or curved surface; The second total reflection surface and the fourth total reflection surface are arranged side by side along the third direction; The first reflective bowl surface and the second reflective bowl surface are arranged side by side along the third direction; The first light incident surface and the second light incident surface are combined into a complete smooth plane or curved surface.

11. The low beam module according to claim 5 or 6, characterized in that: The second reflective focusing structure includes two second reflective bowl surfaces, the two second reflective bowl surfaces are adjacently arranged in parallel along the third direction, and the two second reflective bowl surfaces are symmetrically arranged along the first direction.

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