High‑beam lighting module

Abstract

The present application relates to the technical field of vehicle lamps, and discloses a high‑beam lighting module. The high‑beam lighting module comprises an outer lens unit, an inner lens unit, and a light source; the outer lens unit is of an integrally formed structure and comprises a light exit surface, a first total reflection surface, and a second total reflection surface; first parallel light is incident on the light exit surface, converges through the light exit surface, and is then successively reflected by the first total reflection surface and the second total reflection surface to form second parallel light, wherein the longitudinal convergence degree is greater than the lateral convergence degree; light emitted from the light source passes through the inner lens unit to form intermediate parallel light, and the intermediate parallel light is then successively reflected by the second total reflection surface and the first total reflection surface, and finally exits through the light exit surface to form a high‑beam light pattern that is wide laterally and narrow longitudinally; the first total reflection surface and / or the second total reflection surface is provided with a plurality of micro‑arc concave surfaces to laterally expand the light incident from the inner lens unit, so that the exiting high‑beam light pattern is further laterally expanded and the high‑beam light pattern is more uniform.

Description

High beam lighting module Technical Field

[0001] This disclosure relates to the field of automotive lighting technology, and more particularly to a high beam lighting module.

[0002] Background of the Invention

[0003] In recent years, high beam lighting modules have undergone rapid iteration and upgrades along with the development of automotive lighting technology. However, most existing high beam lighting modules use single-layer single-focus lenses as their outer lenses, or single-layer multi-focus lenses composed of multiple single-layer single-focus lenses. Because single-layer single-focus lenses have the same focusing degree both horizontally and vertically, the controllability of the high beam's flat vertical and wide horizontal beam pattern is poor. Moreover, to ensure high beam efficiency, the outer lens needs to maintain a large size to collect light, which limits the size variation of the outer lens and makes it difficult to achieve ultra-narrow aperture sizes in high beam lighting modules, while ultra-narrow high beam lighting modules have become one of the industry's development trends. For single-layer multi-focus lenses, multiple single-layer single-focus lenses need to be spliced ​​together to form a complete high beam pattern, which is not conducive to the design of the outer lens and results in a poor static appearance. High beam lighting modules containing two or more lenses also lead to significant Fresnel loss and poor dispersion. Summary of the Invention

[0004] To address the aforementioned technical issues, this disclosure provides a high-beam illumination module that achieves a greater longitudinal convergence than lateral convergence through an integrally formed outer lens unit, effectively separating longitudinal and lateral focusing. Furthermore, the longitudinal focal length is greater than the lateral focal length, facilitating a high-beam pattern that is wider laterally and narrower longitudinally. Multiple micro-arc concave surfaces are provided on the total reflection surface, further widening and uniformizing the high-beam pattern laterally. The integrally formed outer lens unit is a single-layer lens structure, allowing for diverse lens sizes to meet various design requirements. This facilitates narrowing the light-emitting surface opening, achieving an ultra-narrow high-beam illumination module. It also effectively reduces Fresnel loss. Utilizing total reflection, the optical path is folded, shortening the size and improving luminous efficiency while reducing the lens's volume and weight. Additionally, the outer lens exhibits good static appearance consistency, low dispersion, and excellent color uniformity.

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

[0006] A high beam lighting module includes a light source, an inner lens unit, and an outer lens unit arranged sequentially along a first direction;

[0007] The outer lens unit is an integrally formed structure. The outer lens unit includes a light-emitting surface, a first total reflection surface, and a second total reflection surface. The light-emitting surface is the surface of the outer lens unit that is away from the inner lens unit. The first total reflection surface and the second total reflection surface are arranged opposite to each other along a second direction, and the second direction is perpendicular to the first direction.

[0008] The first parallel light is incident on the light-emitting surface, converges after passing through the light-emitting surface, and is then reflected sequentially by the first total internal reflection surface and the second total internal reflection surface. It converges along the second direction and then along a third direction, becoming the second parallel light. The third direction is perpendicular to both the first and second directions. The ratio of the width of the first parallel light along the second direction to the width of the second parallel light along the second direction is greater than the ratio of the width of the first parallel light along the third direction to the width of the second parallel light along the third direction.

[0009] The light emitted by the light source passes through the inner lens unit to form a central parallel light. The central parallel light is then reflected sequentially by the second total reflection surface and the first total reflection surface, and finally emitted from the light-emitting surface to form a high beam pattern.

[0010] The first total reflection surface and / or the second total reflection surface are provided with a plurality of micro-arc concave surfaces arranged along the third direction. The micro-arc concave surfaces are concave along the third direction to extend the light rays incident from the inner lens unit along the third direction, so that the high beam pattern is extended along the third direction.

[0011] Compared with existing technologies, the above technical solution has the following advantages:

[0012] The high-beam illumination module provided in this embodiment includes an outer lens unit, an inner lens unit, and a light source arranged sequentially along a first direction. The outer lens unit is an integrally formed structure, comprising a light-emitting surface, a first total internal reflection surface, and a second total internal reflection surface. The light-emitting surface is the surface of the outer lens unit facing away from the inner lens unit. The first and second total internal reflection surfaces are arranged opposite to each other along a second direction, which is perpendicular to the first direction. First parallel light is incident from the light-emitting surface, converged by the light-emitting surface, and then reflected sequentially by the first and second total internal reflection surfaces, converging along the second direction and then along a third direction to become second parallel light. The third direction is perpendicular to both the first and second directions. The first, second, and third directions constitute a three-dimensional coordinate system. Thus, the light-emitting surface is mainly used to converge the first parallel light incident from the light-emitting surface along the second direction (i.e., longitudinal direction), and the second total internal reflection surface is mainly used to converge the beam of the first parallel light incident from the light-emitting surface after reflection by the first total internal reflection surface along a third direction (i.e., lateral direction). The first total internal reflection surface is mainly used to match the light-emitting surface and the second... The total internal reflection surface also serves as a partial convergence surface, and the first and second total internal reflection surfaces also fold the light path. Furthermore, the ratio of the width of the first parallel light along the second direction to the width of the second parallel light along the second direction (characterizing the longitudinal convergence degree) is greater than the ratio of the width of the first parallel light along the third direction to the width of the second parallel light along the third direction (characterizing the lateral convergence degree), which is equivalent to lateral and longitudinal focusing separation, and the longitudinal focal length is greater than the lateral focal length, thus facilitating the realization of a long-beam pattern that is wide laterally and narrow longitudinally. In application, the light emitted by the light source passes through the inner... Behind the lens unit, a central parallel light is formed. The central parallel light is then reflected sequentially by the second total reflection surface and the first total reflection surface, and finally emitted from the light-emitting surface to form a high beam pattern. In particular, the first total reflection surface and / or the second total reflection surface are provided with multiple micro-arc concave surfaces arranged along a third direction (i.e., lateral direction). The micro-arc concave surfaces are concave along the third direction to expand the light rays incident from the inner lens unit along the third direction (i.e., lateral direction), so that the emitted high beam pattern is further expanded along the third direction (i.e., lateral direction), and the high beam pattern is also more uniform.

[0013] Furthermore, in the high beam illumination module provided in this embodiment, the integrally formed outer lens unit is a single-layer lens structure, thus the size of the outer lens can be varied to meet various styling requirements. This is beneficial for narrowing the opening size of the light-emitting surface. For example, the longitudinal opening size of the light-emitting surface can be about 12mm, realizing an ultra-narrow high beam illumination module. It can also effectively reduce Fresnel loss, and by utilizing total internal reflection, the optical path is folded and the size is shortened, which improves the light efficiency while reducing the volume and weight of the lens. In addition, the outer lens has good static appearance consistency, the emitted high beam has low dispersion and good color uniformity, and it can also avoid the problem of multi-layer lenses being burned due to focusing by sunlight.

[0014] Brief description of the attached figures

[0015] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 is a side view of a high beam lighting module provided in an embodiment of this disclosure;

[0017] Figure 2 is a top view of a high beam lighting module provided in an embodiment of this disclosure;

[0018] Figure 3 is a bottom-view schematic diagram of a high beam lighting module provided in an embodiment of this disclosure;

[0019] Figure 4 is a front view schematic diagram of a high beam lighting module provided in an embodiment of this disclosure;

[0020] Figure 5 is a side view of an integrally molded outer lens unit in a high beam lighting module provided in this embodiment of the present disclosure;

[0021] Figure 6 is a top view of an integrally molded outer lens unit in a high beam lighting module provided in this embodiment of the present disclosure;

[0022] Figure 7 is a side view schematic diagram of the light tracking of a high beam lighting module provided in an embodiment of this disclosure;

[0023] Figure 8 is a top view schematic diagram of the light tracing of a high beam lighting module provided in an embodiment of this disclosure;

[0024] Figure 9 is a frontal view schematic diagram of the light tracing of a high beam lighting module provided in an embodiment of this disclosure;

[0025] Figure 10 is a diagram showing the lighting effect of the high beam pattern emitted by a high beam lighting module (the second total reflection surface is provided with a micro-arc concave surface) provided in an embodiment of this disclosure.

[0026] Figure 11 is a diagram showing the lighting effect of the high beam pattern emitted by a high beam lighting module (the second total reflection surface does not have a micro-arc concave surface) provided in an embodiment of this disclosure.

[0027] Figure 12 is a top view of a high beam lighting module provided in this embodiment of the present disclosure, showing the light emitted by the light source passing through the inner lens unit.

[0028] Figure 13 is a side view of a high beam lighting module provided in this embodiment of the present disclosure, showing the light emitted by the light source passing through the inner lens unit.

[0029] Reference numerals: 100-Light source; 200-Inner lens unit; 300-Outer lens unit; 310-Light emitting surface; 320-First total reflection surface; 330-Second total reflection surface; X-First direction; Y-Second direction; Z-Third direction; S1-Micro-arc concave surface; 340-First side surface; 350-Second side surface; D1-Thick-walled light emitting structure; T1-Light guide tooth structure; T11-First tooth surface; T12-Second tooth surface; T2-Light blocking tooth structure; T21-Third tooth surface; T22-Fourth tooth surface; 210-Light incident surface; 220-Reflecting bowl surface.

[0030] Methods of implementing the present invention

[0031] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0032] As described in the background section, most existing high beam lighting modules use a single-layer single-focus lens as the outer lens, or a single-layer multi-focus lens composed of multiple single-layer single-focus lenses. Because a single-layer single-focus lens has the same focusing degree both horizontally and vertically, the controllability of the beam pattern—which is flat vertically and wide horizontally—is poor. Furthermore, to ensure high beam efficiency, the outer lens needs to be large to collect light, which limits the size variation of the outer lens and hinders the achievement of ultra-narrow aperture sizes in high beam lighting modules, a trend that has become increasingly prevalent in the industry. For single-layer multi-focus lenses, multiple single-layer single-focus lenses need to be combined to form a complete high beam pattern, which is detrimental to the design of the outer lens and results in a poor static appearance. High beam lighting modules containing two or more lenses also lead to significant Fresnel loss and poor dispersion.

[0033] In view of the above, this disclosure provides a high beam lighting module. Figure 1 shows a side view of a high beam lighting module provided in this disclosure, Figure 2 shows a top view of a high beam lighting module provided in this disclosure, Figure 3 shows a bottom view of a high beam lighting module provided in this disclosure, and Figure 4 shows a front view of a high beam lighting module provided in this disclosure. As shown in Figures 1-4, the high beam lighting module provided in this disclosure includes a light source 100, an inner lens unit 200, and an outer lens unit 300 arranged sequentially along a first direction X. The outer lens unit 300 is an integrally formed structure and includes a light-emitting surface 310, a first total reflection surface 320, and a second total reflection surface 330. The light-emitting surface 310 is the surface of the outer lens unit 300 that faces away from the inner lens unit 200. The first total reflection surface 320 and the second total reflection surface 330 are arranged opposite to each other along a second direction Y, and the second direction X is perpendicular to the first direction Y.

[0034] To better understand this disclosure, Figure 5 shows a side view of an integrally molded outer lens unit 300 in a high beam lighting module provided in an embodiment of this disclosure, and Figure 6 shows a top view of an integrally molded outer lens unit 300 in a high beam lighting module provided in an embodiment of this disclosure. As shown in Figures 5 and 6, the first parallel light is incident from the light-emitting surface 310, converges after being reflected by the light-emitting surface 310, and then is reflected sequentially by the first total reflection surface 320 and the second total reflection surface 330, converges along the second direction Y, and converges along the third direction Z, becoming the second parallel light. 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 the longitudinal direction, that is, the longitudinal direction of the high beam pattern projected by the high beam lighting module is narrow, and the third direction Z is the lateral direction of the high beam pattern projected by the high beam lighting module is wide.

[0035] Among them, the light-emitting surface 310 is mainly used to converge the first parallel light incident from the light-emitting surface 310 along the second direction Y (i.e., longitudinal direction), and the second total reflection surface 330 is mainly used to converge the light beam after the first parallel light incident from the light-emitting surface 310 is reflected by the first total reflection surface 320 along the third direction Z (i.e., transverse direction). The first total reflection surface 320 is mainly used to match the light-emitting surface 310 and the second total reflection surface 330, and also plays a partial converging role. The first total reflection surface 310 and the second total reflection surface 320 also play a role in folding the optical path.

[0036] Optionally, the light-emitting surface 310 can be a convex surface along the second direction Y (i.e., longitudinal direction) to facilitate the convergence of the first parallel light incident from the light-emitting surface 310 along the second direction Y (i.e., longitudinal direction).

[0037] Optionally, the first total reflection surface 320 can be a curved surface or a flat surface.

[0038] Optionally, the second total reflection surface 330 can be a concave surface along the third direction Z (i.e., transverse) to facilitate the convergence of the beam of light after the first parallel light incident from the light-emitting surface 310 is reflected by the first total reflection surface 320 along the third direction Z (i.e., transverse).

[0039] As shown in Figures 5 and 6, the ratio of the width of the first parallel light along the second direction Y to the width of the second parallel light along the second direction Y characterizes the degree of convergence of the parallel light incident from the light-emitting surface 310 along the second direction Y (i.e., longitudinal direction) by the outer lens unit 300. The ratio of the width of the first parallel light along the third direction Z to the width of the second parallel light along the third direction Z characterizes the degree of convergence of the parallel light incident from the light-emitting surface 310 along the third direction Z (i.e., transverse direction) by the outer lens unit 300. The ratio of the width of the first parallel light along the second direction Y to the width of the second parallel light along the second direction Y is greater than the ratio of the width of the first parallel light along the third direction Z to the width of the second parallel light along the third direction Z. That is, the longitudinal convergence of the parallel light incident from the light-emitting surface 310 by the outer lens unit 300 is greater than the transverse convergence, which is equivalent to longitudinal and transverse focusing separation, and the longitudinal focal length is greater than the transverse focal length, thus facilitating the realization of a long beam pattern that is wide laterally and narrow longitudinally.

[0040] Figure 7 shows a side view schematic diagram of the light tracking of a high beam lighting module provided in an embodiment of the present disclosure. Figure 8 shows a top view schematic diagram of the light tracking of a high beam lighting module provided in an embodiment of the present disclosure. Figure 9 shows a front view schematic diagram of the light tracking of a high beam lighting module provided in an embodiment of the present disclosure. As shown in Figures 7-9, the light emitted by the light source 100 passes through the inner lens unit 200 to form a central parallel light. The central parallel light is then reflected sequentially by the second total reflection surface 330 and the first total reflection surface 320, and finally emitted from the light-emitting surface 310 to form a high beam pattern.

[0041] Specifically, referring to Figures 3-4 and 9, the first total reflection surface 320 and / or the second total reflection surface 330 are provided with a plurality of micro-arc concave surfaces S1 arranged along the third direction Z (i.e., lateral direction). The micro-arc concave surfaces S1 are concave along the third direction Z (i.e., lateral direction) to expand the light rays incident from the inner lens unit 200 along the third direction Z (i.e., lateral direction), so that the emitted high beam pattern is further expanded along the third direction Z (i.e., lateral direction), and the high beam pattern will be more uniform.

[0042] Optionally, the first total reflection surface 320 is provided with a plurality of micro-arc concave surfaces S1 arranged along the third direction Z (i.e., laterally). Alternatively, the second total reflection surface 330 is provided with a plurality of micro-arc concave surfaces S1 arranged along the third direction Z (i.e., laterally). Alternatively, both the first total reflection surface 320 and the second total reflection surface 330 are provided with a plurality of micro-arc concave surfaces S1 arranged along the third direction Z (i.e., laterally).

[0043] Taking the second total reflection surface 330 as an example, which is provided with multiple micro-arc concave surfaces S1 arranged along the third direction Z (i.e., horizontal direction), as shown in Figure 9, since the micro-arc concave surfaces S1 are concave along the third direction Z (i.e., horizontal direction), the light emitted by the light source 100 forms a central parallel light after passing through the inner lens unit 200. The central parallel light is incident on the multiple micro-arc concave surfaces S1 arranged along the third direction Z (i.e., horizontal direction) and is concave along the third direction Z (i.e., horizontal direction). It will be expanded and reflected by each micro-arc concave surface S1 along the third direction Z (i.e., horizontal direction), thereby causing the emitted far-beam pattern to expand along the third direction Z (i.e., horizontal direction).

[0044] The larger the radius of curvature of the micro-arc concave surface S1, the gentler the arc of the micro-arc concave surface S1 along the third direction Z (i.e., the transverse direction), and the greater the extent to which the micro-arc concave surface S1 expands and reflects the light rays incident from the inner lens unit 200 along the third direction Z (i.e., the transverse direction). Conversely, the smaller the radius of curvature of the micro-arc concave surface S1, the steeper the arc of the micro-arc concave surface S1 along the third direction Z (i.e., the transverse direction), and the smaller the extent to which the micro-arc concave surface S1 expands and reflects the light rays incident from the inner lens unit 200 along the third direction Z (i.e., the transverse direction).

[0045] The greater the extent to which the micro-arc concave surface S1 expands the reflection of light rays incident from the inner lens unit 200 along the third direction Z (i.e., laterally), the lower the brightness of the light reflected by the micro-arc concave surface S1; conversely, the smaller the extent to which the micro-arc concave surface S1 expands the reflection of light rays incident from the inner lens unit 200 along the third direction Z (i.e., laterally), the higher the brightness of the light reflected by the micro-arc concave surface S1.

[0046] Considering the regulatory requirements for high beam patterns, the brightness of the central area of ​​the high beam pattern must be high enough, while the brightness requirements for the areas along the lateral sides of the high beam pattern are not high. Therefore, in this embodiment, the radius of curvature of the micro-arc concave surface S1 is reasonably set to expand and reflect the light rays incident from the inner lens unit 200 along the third direction Z (i.e., lateral direction), but the expansion degree will not be too large, so as to ensure that the brightness of the central area of ​​the high beam pattern is high enough, and also to expand the high beam pattern along the third direction Z (i.e., lateral direction).

[0047] Therefore, the high beam lighting module provided in this embodiment achieves a greater degree of vertical convergence than horizontal convergence through the integrally formed outer lens unit 300, which is equivalent to horizontal and vertical focus separation. Moreover, the vertical focal length is greater than the horizontal focal length, which facilitates the realization of a high beam pattern that is wide horizontally and narrow vertically. Furthermore, multiple micro-arc concave surfaces S1 are provided on the first total reflection surface 320 and / or the second total reflection surface 330 in the outer lens unit 300, which further widens the high beam pattern horizontally, making the high beam pattern more uniform.

[0048] Furthermore, in the high beam illumination module provided in this embodiment, the integrally formed outer lens unit 300 is a single-layer lens structure, so the size of the outer lens can be varied to meet various design requirements. This is beneficial for narrowing the opening size of the light-emitting surface 310. For example, the opening size of the light-emitting surface 310 along the second direction Y (i.e., longitudinal direction) can be about 12mm, realizing an ultra-narrow high beam illumination module. It can also effectively reduce Fresnel loss, and by utilizing total internal reflection, the optical path is folded and the size is shortened, which improves the light efficiency while reducing the volume and weight of the lens. In addition, the outer lens has good static appearance consistency, the emitted high beam has low dispersion and good color uniformity, and it can also avoid the problem of multi-layer lenses being burned due to focusing by sunlight.

[0049] Considering that the light emitted by the light source 100 forms a central parallel light after passing through the inner lens unit 200, and the central parallel light is first reflected by the second total reflection surface 330, then reflected by the first total reflection surface 320, and finally emitted as a high beam pattern through the light emitting surface 310, that is, the second total reflection surface 330 contacts the central parallel light before the first total reflection surface 320, therefore, preferably, the second total reflection surface 330 is provided with multiple micro-arc concave surfaces S1 arranged along the third direction Z (i.e., lateral direction), so that the light incident from the inner lens unit 200 can be expanded along the third direction Z (i.e., lateral direction) as early as possible. Subsequently, the first total reflection surface 320 and the light emitting surface 310 adjust the light after it has been expanded along the third direction Z (i.e., lateral direction) to form a high beam pattern with sufficient central brightness, lateral expansion and greater uniformity.

[0050] Figure 10 shows the lighting effect of the high beam pattern emitted by a high beam lighting module (the second total reflection surface 330 is provided with a micro-arc concave surface S1) provided in an embodiment of the present disclosure. In contrast, Figure 11 shows the lighting effect of the high beam pattern emitted by a high beam lighting module (the second total reflection surface 330 is not provided with a micro-arc concave surface S1) provided in an embodiment of the present disclosure. It can be clearly seen that, due to the provision of multiple micro-arc concave surface structures S1 on the second total reflection surface 330, the high beam pattern is further widened laterally and the high beam pattern is also more uniform.

[0051] Based on this, and further considering the regulatory requirements for high beam patterns, the brightness of the central area of ​​the high beam pattern must be sufficiently high, while the brightness requirements for the areas along the lateral sides of the high beam pattern are not high. Moreover, we also want the high beam pattern to extend laterally. Therefore, optionally, referring to Figure 9, in the second total reflection surface 330, with the projection of the light source 100 along the first direction X of the second total reflection surface 330 as the center, the radius of curvature R1 of the i-th micro-arc concave surface S1 on the left and right sides along the third direction Z (i.e., lateral) satisfies: 0mm<R1≤10mm, and the radius of curvature R2 of the j-th micro-arc concave surface S1 on the left and right sides along the third direction Z (i.e., lateral) satisfies: R2≥20mm, where 1≤i≤4, j>4, and i and j are integers.

[0052] In the second total internal reflection surface 330, the light received by some micro-arc concave surfaces S1 along the third direction Z, near the projection of the light source 100 along the first direction X onto the second total internal reflection surface 330, from the inner lens unit 200, is relatively bright. The radius of curvature R1 of these micro-arc concave surfaces S1 is set to be small, thus the extent to which these micro-arc concave surfaces S1 extend the reflection of the light from the inner lens unit 200 along the third direction Z (i.e., laterally) is relatively small, ensuring the brightness of the central region of the far-beam pattern. Simultaneously, the second total internal reflection surface 330... In the middle, the light received by some micro-arc concave surfaces S1 that are far from the projection of the light source 100 along the first direction X on the second total reflection surface 330 along the third direction Z is relatively small in brightness from the light incident from the inner lens unit 200. The radius of curvature R2 of these micro-arc concave surfaces S1 is set to be large. As a result, the extent of the expansion of the light incident from the inner lens unit 200 along the third direction Z (i.e., lateral) by these micro-arc concave surfaces S1 is relatively large, so that the emitted far beam pattern is expanded along the third direction Z (i.e., lateral), and the far beam pattern will be more uniform.

[0053] Optionally, in the second total reflection surface 330, the width of the micro-arc concave surface S1 along the third direction Z (i.e., the transverse direction) can be 1 mm.

[0054] Based on any of the above embodiments, optionally, as shown in Figures 1-3, in the outer lens unit 300, the light-emitting surface 310 is connected to the first total reflection surface 320 through the first side surface 340, and the light-emitting surface 310 is also connected to the second total reflection surface 330 through the second side surface 350. The first side surface 340 and the second side surface 350 are arranged opposite to each other along the second direction Y, and the first side surface 340 and the second side surface 350 extend along the first direction X. There is a thick-walled light-emitting structure D1 between the first side surface 340 and the second side surface 350. This arrangement is more conducive to forming a high beam pattern that is wide laterally and narrow longitudinally. On the other hand, the light-emitting surface 310 extends along the first direction X, which makes the appearance design of the outer lens more flexible.

[0055] Alternatively, in the outer lens unit 300, the light-emitting surface 310 can also be directly connected to the first total reflection surface 320, and the light-emitting surface 310 can also be directly connected to the second total reflection surface 330. With this arrangement, the path of the light beam transmitted in the lens can be shortened, and the light efficiency can be further improved.

[0056] Based on the connection between the light-emitting surface 310 of the outer lens unit 300 and the first total reflection surface 320 through the first side surface 340 and the connection with the second total reflection surface 330 through the second side surface 350, optionally, as shown in FIGS. 1-3, the first side surface 340 and the second side surface 350 are provided with a light guide tooth structure T1 arranged along the first direction X and extending along the third direction Z. The light guide tooth structure T1 is in the shape of a triangular pyramid, and the light guide tooth structure T1 includes a first tooth surface T11 and a second tooth surface T12 that are intersectingly connected.

[0057] In the present disclosure, the light rays in the mentioned intermediate parallel light, first parallel light, and second parallel light are parallel to each other and / or approximately parallel, that is, generally parallel. And, the light rays emitted by the light source 100 form intermediate parallel light after passing through the inner lens unit 200. After the intermediate parallel light is reflected by the second total reflection surface 330 and the first total reflection surface 320 in sequence, the formed high beam light pattern has a better parallel effect relative to the intermediate parallel light. However, inevitably, after the intermediate parallel light is reflected by the second total reflection surface 330 and the first total reflection surface 320 in sequence, some non-parallel light (i.e., stray light) will be incident on the first side surface 340 and / or the second side surface 350. By providing the light guide tooth structure T1 arranged along the first direction X and extending along the third direction Z on the first side surface 340 and the second side surface 350, the stray light incident on the first side surface 340 and / or the second side surface 350 can be reflected and refracted by the light guide tooth structure T1, so that the stray light is emitted outside the lens and does not emit from the light-emitting surface 310, avoiding the interference of the stray light on the high beam light pattern.

[0058] Optionally, as shown in FIG. 1, the light guide tooth structure T1 is recessed into the thick-walled light-emitting structure D1, that is, the connection angle of the first tooth surface T11 and the second tooth surface T12 of the light guide tooth structure T1 faces the inside of the thick-walled light-emitting structure D1. In this way, while dissipating the stray light by the light guide tooth structure T1, the volume of the thick-walled light-emitting structure D1 is also reduced, thereby saving materials and costs. However, it should be noted that since the light guide tooth structure T1 is recessed into the thick-walled light-emitting structure D1, the height h of the light guide tooth structure T1 along the second direction Y needs to be controlled. Optionally, 0 mm < h ≤ 3 mm can be set to avoid the influence of the light guide tooth structure T1 on the main parallel light rays passing through the inside of the thick-walled light-emitting structure D1.

[0059] Alternatively, the light guide tooth structure T1 can also protrude in a direction away from the thick-walled light-emitting structure D1. That is, the connection angle between the first tooth surface T11 and the second tooth surface T12 of the light guide tooth structure T1 protrudes in a direction away from the thick-walled light-emitting structure D1. In this way, the light guide tooth structure T1 can avoid affecting the main parallel light rays passing through the interior of the thick-walled light-emitting structure D1, but at the same time, it will also increase the volume of the thick-walled light-emitting structure D1 accordingly.

[0060] Based on the above embodiments, since the first total internal reflection surface 320 and the second total internal reflection surface 330 are arranged opposite each other along the second direction Y, some light rays incident from the inner lens unit 200 may reach the vicinity of the second side surface 350 without passing through the second total internal reflection surface 330 and the first total internal reflection surface 320. Alternatively, some light rays incident from the inner lens unit 200 may reach the vicinity of the second side surface 350 even after passing through the second total internal reflection surface 330 and the first total internal reflection surface 320. The light rays reaching the vicinity of the second side surface 350 do not contribute to the high beam pattern and can be considered as stray light. Although the light guide tooth structure T1 has been used in the aforementioned embodiments to dissipate the stray light reaching the second side surface 350, it may still be insufficient to completely dissipate the stray light reaching the vicinity of the second side surface 350.

[0061] Based on this, as shown in Figure 1, the second side surface 350 of the outer lens unit 300 is further provided with a light-blocking tooth structure T2 extending along the third direction Z. The light-blocking tooth structure T2 is located on the side of the light guide tooth structure T1 on the second side surface 350 near the second total reflection surface 330. The light-blocking tooth structure T2 is recessed into the thick-walled light-emitting structure D1. The light-blocking tooth structure T2 is triangular pyramidal in shape and includes a third tooth surface T21 and a fourth tooth surface T22 that intersect and connect.

[0062] Similar to the light guide tooth structure T1, the light blocking tooth structure T2 reflects and refracts the stray light incident on the second side 350, so that the stray light exits outside the lens and does not exit from the light emitting surface 310, thus avoiding interference of stray light with the high beam pattern. Alternatively, even if the light blocking tooth structure T2 reflects and refracts the stray light incident on the second side 350 and some light rays exit from the light emitting surface 310, these light rays will exit into the area with a higher beam pattern, which is outside the visible angle range of the human eye.

[0063] Based on any of the above embodiments, optionally, as shown in Figures 1-3, the inner lens unit 200 and the outer lens unit 300 are integrally formed structures; the inner lens unit 200 includes an incident light surface 210 and a reflective bowl surface 220, the incident light surface 210 is the surface of the inner lens unit 200 that is away from the outer lens unit 300, and the reflective bowl surface 220 is deflected toward the outer lens unit 300 relative to the incident light surface 210.

[0064] To better understand, Figure 12 shows a top view of the light emitted from the light source 100 passing through the inner lens unit 200, and Figure 13 shows a side view of the light emitted from the light source 100 passing through the inner lens unit 200. Combined with Figures 7 and 8, the light emitted from the light source 200 is incident on the light-incident surface 210, converges on the reflector surface 220, and after being reflected by the reflector surface 220, forms an intermediate parallel light. Then, the intermediate parallel light is reflected sequentially by the second total reflection surface 330 and the first total reflection surface 320, and exits from the light-emitting surface 310 as a high-beam pattern.

[0065] The incident surface 210 primarily functions to collect and focus light; the reflecting bowl 220, being a total internal reflection freeform surface, also primarily functions to collect and focus light and form a parallel beam in the center. Furthermore, the inner lens unit 200 and the outer lens unit 300 are matched and coupled to each other to ultimately project a high-intensity beam pattern that is wide laterally and narrow longitudinally.

[0066] The inner lens unit 200 and the outer lens unit 300 are integrally formed, that is, the inner lens unit 200 and the outer lens unit 300 are combined into one lens. This can further shorten the dimension chain and further reduce Fresnel loss, thereby improving optical efficiency.

[0067] Specifically, as shown in Figures 1 and 2, the first total internal reflection surface 320 and the reflector bowl 220 can be directly connected or connected through a connecting surface, and the second total internal reflection surface 330 and the incident light surface 210 can be connected through a connecting surface. In this way, the light emitted by the light source 100 is incident on the incident light surface 210, and then transmitted inside the integrally formed lens. After being reflected by the reflector bowl 220, the second total internal reflection surface 330, and the first total internal reflection surface 320 in sequence, the light is finally emitted from the light exiting surface 310. The optical path is short, the Fresnel loss is small, and the optical efficiency is high.

[0068] Alternatively, the inner lens unit 200 and the outer lens unit 300 can also be separate structures, depending on the specific circumstances.

[0069] Further optionally, as shown in Figures 2 and 3, the inner lens unit 200 includes two incident surfaces 210 and two reflective bowls 220. The incident surfaces 210 and the reflective bowls 220 correspond one-to-one, and the incident surfaces 210 and the light source 100 correspond one-to-one. The two reflective bowls 220 are symmetrically arranged along the first direction X. In this way, the corresponding light source 100, incident surfaces 210 and reflective bowls 220 form an inner lens subunit. The two inner lens subunits in the inner lens unit 200 are arranged side by side along the third direction Z (i.e., laterally), which can improve the brightness of the central region of the emitted far beam pattern and broaden the emitted far beam pattern along the third direction Z (i.e., laterally).

[0070] Referring to Figures 2 and 3, when the inner lens unit 200 includes two inner lens sub-units, these two inner lens sub-units correspond to the same second total reflection surface 330, the same first total reflection surface 320, and the same light-emitting surface 310. Then, in the second total reflection surface 330, the curvature radius R1 of the i-th micro-arc concave surface S1 on both sides of the third direction Z (i.e., the lateral direction) with the projection of the light source 100 along the first direction X on the second total reflection surface 330 as the center can still satisfy: 0mm<R1≤10mm, and the curvature radius R2 of the j-th micro-arc concave surface S1 on both sides of the third direction Z (i.e., the lateral direction) can satisfy: R2≥20mm, where 1≤i≤4, j>4, and i and j are integers.

[0071] In the second total reflection surface 330, the number of micro-arc concave surfaces S1 between the projections of the two light sources 100 along the first direction X on the second total reflection surface 330 may be small. Therefore, the radius of curvature R1 of the micro-arc concave surfaces S1 between the projections of the two light sources 100 along the first direction X on the second total reflection surface 330 may all satisfy: 0mm<R1≤10mm.

[0072] Alternatively, the high beam lighting module may include at least two inner lens units 200, each inner lens unit 200 being arranged side by side along the third direction Z (i.e., laterally), which is beneficial for extending the emitted high beam pattern along the third direction Y (i.e., laterally).

[0073] When the high beam lighting module includes at least two inner lens units 200, each inner lens unit 200 can be a one-piece molded structure, and each inner lens unit 200 can also be a one-piece molded structure with the outer lens unit 300.

[0074] Alternatively, the inner lens unit 200 in the high beam lighting module can also be a single unit, depending on the specific situation.

[0075] The various parts of this manual are described in a combination of parallel and progressive methods. Each part focuses on the differences between the other parts, and the same or similar parts can be referred to each other.

[0076] The features described above regarding the disclosed embodiments can be substituted or combined with each other to enable those skilled in the art to implement or use this disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high beam lighting module, comprising a light source, an inner lens unit and an outer lens unit arranged in sequence along a first direction; wherein the outer lens unit is an integral structure, the outer lens unit comprises a light exit surface, a first total reflection surface and a second total reflection surface, the light exit surface is a surface of the outer lens unit facing away from the inner lens unit, the first total reflection surface and the second total reflection surface are oppositely arranged along a second direction, the second direction is perpendicular to the first direction; first parallel light is incident on the light exit surface, converges after passing through the light exit surface, and is reflected by the first total reflection surface and the second total reflection surface in sequence, converges along the second direction, and converges along a third direction to become second parallel light, the third direction is perpendicular to the first direction and perpendicular to the second direction; the ratio of the width of the first parallel light along the second direction to the width of the second parallel light along the second direction is greater than the ratio of the width of the first parallel light along the third direction to the width of the second parallel light along the third direction; light emitted by the light source passes through the inner lens unit to form intermediate parallel light, the intermediate parallel light is reflected by the second total reflection surface and the first total reflection surface in sequence, and finally exits from the light exit surface to form a high beam light pattern; the first total reflection surface and / or the second total reflection surface are provided with a plurality of micro-arc concave surfaces arranged along the third direction, the micro-arc concave surfaces are concave along the third direction to expand the light incident from the inner lens unit along the third direction, so that the high beam light pattern is expanded along the third direction.

2. The high beam illumination module of claim 1, wherein, the first total reflection surface is a curved surface or a plane, and a plurality of the micro-arc concave surfaces arranged along the third direction are arranged on the first total reflection surface.

3. The high beam illumination module of claim 1 or 2, wherein, the light exit surface is a convex surface along the second direction.

4. The high beam illumination module of any one of claims 1 to 3, wherein, the second total reflection surface is a concave surface along the third direction.

5. The high beam illumination module of claim 1, wherein, the plurality of micro-arc concave surfaces arranged along the third direction are arranged on the second total reflection surface.

6. The high beam illumination module of claim 5, wherein, in the second total reflection surface, the radius of curvature R1 of the i th micro-arc concave surface on the left and right sides along the third direction, with the projection of the light source on the second total reflection surface along the first direction as the center, satisfies: 0mm < R1 ≤ 10mm, and the radius of curvature R2 of the j th micro-arc concave surface on the left and right sides along the third direction satisfies: R2 ≥ 20mm, where 1 ≤ i ≤ 4 and j > 4, i and j are integers.

7. The high beam illumination module of any one of claims 1 to 6, wherein, the light exit surface is connected to the first total reflection surface through a first side surface, and is connected to the second total reflection surface through a second side surface, the first side surface and the second side surface are oppositely arranged along the second direction, and the first side surface and the second side surface have a thick-walled light exit structure therebetween.

8. The high beam illumination module of claim 7, wherein, the first side surface and the second side surface are provided with a light guide tooth structure arranged along the first direction and extending along the third direction, the light guide tooth structure is in the shape of a triangular pyramid, and the light guide tooth structure comprises a first tooth surface and a second tooth surface intersectingly connected.

9. The high beam illumination module of claim 8, wherein, the light guide tooth structure is recessed into the thick-walled light exit structure, and the height h of the light guide tooth structure along the second direction satisfies: 0mm < h ≤ 3mm.

10. The high beam illumination module of claim 8 or 9, wherein, The second side is also provided with a light-blocking tooth structure extending along the third direction, and the light-blocking tooth structure is located on the side of the light-guiding tooth structure on the second side near the second total reflection surface; The light-blocking tooth structure is recessed into the thick-walled light-emitting structure. The light-blocking tooth structure is triangular pyramidal in shape and includes a third tooth surface and a fourth tooth surface that intersect and connect.

11. The high beam illumination module of claim 8, wherein, The light guide tooth structure protrudes in a direction away from the thick-walled light-emitting structure.

12. The high beam illumination module of any one of claims 1 to 11, wherein, The inner lens unit and the outer lens unit are integrally formed; The inner lens unit includes an incident surface and a reflective cup surface. The incident surface is the surface of the inner lens unit that faces away from the outer lens unit, and the reflective cup surface is deflected relative to the incident surface towards the outer lens unit. The light emitted by the light source is incident on the light-incident surface, converges on the reflective surface, and is reflected by the reflective surface to form the intermediate parallel light.

13. The high beam illumination module of claim 12, wherein, The inner lens unit includes two light-incident surfaces and two reflective bowls, with each light-incident surface and each reflective bowl corresponding to a light source. The two reflective bowls are arranged symmetrically along the first direction.

14. The high beam illumination module of claim 13, wherein, The radius of curvature R1 of the micro-arc concave surface between the projections of the two light sources along the first direction onto the second total reflection surface all satisfy: 0mm < R1 ≤ 10mm.

15. The high beam illumination module of claim 12, wherein, The high beam lighting module includes at least two inner lens units, each of which is arranged side by side along the third direction.

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