Direct low beam lens module

Abstract

The present application relates to the field of vehicle light lenses, and provides a direct-type low-beam lens module, including an outer lens, a main lens, an auxiliary lens, a main light source, and an auxiliary light source. The main lens is located between the outer lens and the main light source, and the main lens focuses a divergent first light beam emitted from the center point of the main light source to a first imaging point. The distance from the first imaging point to the outer lens is equal to the focal length of the outer lens. The auxiliary lens is located between the outer lens and the auxiliary light source; the auxiliary lens can focus the divergent light emitted from the center point of the auxiliary light source to a second imaging point. The distance from the second imaging point to the outer lens is equal to or greater than the focal length of the outer lens. The main light source is refracted by the main lens and then by the outer lens. The distance from the first imaging point to the outer lens is equal to the focal length of the outer lens. Compared with emitting a large amount of light near the main lens, a large amount of parallel or nearly parallel light can be refracted, which can greatly improve the brightness of zone II.

Description

Technical Field

[0001] The present application relates to the field of vehicle light lenses, and in particular to a direct-type low-beam lens module. Background Art

[0002] The lens modules of headlights include direct type and reflective type. The direct lens module gathers the light to a certain area by refracting the light. Different lens modules have different effects, and the utilization rate of the light is also different. Especially for electric bicycles, the speed limit is generally 25 kilometers per hour, and the braking distance is about 10 meters. Basically, there is no need to use high beams. The irradiation distance of low beams is 10 to 25 meters, which basically meets the needs. For faster vehicles, the braking distance is about 30 meters when the speed is about 50 kilometers per hour. The irradiation distance of low beams needs to be increased to 25 to 50 meters. This has certain requirements on the illumination of the headlights. If the utilization rate of the lens module for light is low, then the power of the headlights needs to be increased to increase the energy consumption of the vehicle. In addition, the increase in power will further increase the size and mass of the headlights, and occupy a larger space. Therefore, the most ideal way is to increase the lighting brightness of the headlights by improving the light utilization efficiency of the lens module under the condition that the power of the headlights remains unchanged.

[0003] The low beam headlights present four areas on the light distribution screen, each with different lighting effects and illumination values. Area 1 is the illumination position of the low beam headlights 5m to 10m in front of the vehicle. The illumination in this area cannot exceed the maximum value, mainly for the driver to observe the road conditions in front of the vehicle. Too high brightness will cause the driver to not see the road conditions in the distance, and will also cause the road surface reflection near to cause glare; Area 2 is the main light distribution area of ​​the low beam headlights, with an illumination distance of 20m from the vehicle. In the above range, the light in this area is concentrated and evenly distributed. There is a lower limit of illumination test point in the middle of zone 2, and there are certain requirements for illumination. Zone 3 is the anti-glare area of ​​the low beam, which is mainly distributed above the light-dark cut-off line. The illumination in this area cannot exceed 0.7lx to prevent the driver on the opposite side from being dazzled when meeting. Zone 4 is the transition area between zones 1 and 2. This area is the illumination position of the low beam 10m to 20m in front of the vehicle. The illumination in this area is between zones 1 and 2, and there is a lower limit of illumination. The brightness at the junction with zone 1 cannot be too large to prevent the driver from feeling too much lighting difference when the line of sight alternates between near and far, thereby deepening the fatigue of the eyes. For small electric bicycles or other two-wheeled vehicles, the power of the headlights is small, and it is difficult to illuminate a large range. For electric bicycles with a speed limit of 25 kilometers per hour, the light in zones 1, 2, and 4 fully meets the needs of night driving. For two-wheeled vehicles with faster speeds, the brightness of zone 2 needs to be higher to provide higher safety.

[0004] The invention patent with the Chinese invention patent publication number "CN109340694A" and the patent name "A dual-beam lens and a car light" discloses a lens structure, which includes a low beam lens and a high beam lens. The curvature radius of the low beam lens is smaller than the curvature radius of the high beam lens, so that the low beam light is more divergent than the high beam. In this way, the lighting brightness of the center area of ​​the low beam lamp is greatly reduced. If you want to increase the effective illumination distance of the low beam lamp to within 25 meters to 50 meters, you need to further increase the power of the low beam lamp. However, due to the heat dissipation problem, the power of one lamp bead is limited, and setting multiple lamp beads will cause problems with the arrangement of the lamp beads and the efficiency of light utilization. Summary of the invention

[0005] The present application provides a direct-type low-beam lens module, which can improve the efficiency of the lens module in utilizing light, and make the lighting brightness of the two zones of the headlights higher and able to illuminate farther without adding additional lamp beads or increasing the power of the lamp beads.

[0006] According to the present application, a direct-type low-beam lens module is provided, comprising an outer lens, a main lens, an auxiliary lens, a main light source and an auxiliary light source, wherein the main lens is located between the outer lens and the main light source, the main lens focuses a divergent first light beam emitted from the center point of the main light source to a first imaging point, the distance from the first imaging point to the outer lens is equal to the focal length of the outer lens, and the auxiliary lens is located between the outer lens and the auxiliary light source;

[0007] The auxiliary lens can focus the divergent light emitted from the center point of the auxiliary light source to the second imaging point. The distance from the second imaging point to the outer lens is equal to or greater than the focal length of the outer lens.

[0008] Alternatively, the auxiliary lens can focus a divergent second light beam emitted from the center point of the auxiliary light source to a second imaging point, the distance from the second imaging point to the outer lens is less than the focal length of the outer lens, and then refracted through the corrective convex lens to form a second light beam with a smaller luminous angle, the second light beam has a second virtual image point, and the distance from the second virtual image point to the outer lens is equal to the focal length of the outer lens.

[0009] In one embodiment, the main lens can reduce the included angle of the main light source with a light-emitting angle of 130° to 160°-190° after refraction to form a first light beam with a light-emitting angle of 30°-60°, which can improve the lighting brightness of the two zones.

[0010] In one possible implementation, the auxiliary lens can refract the auxiliary light source with a light-emitting angle of 130° to reduce the included angle by 150°-160° to form a second light beam with a light-emitting angle of 20°-30°.

[0011] In one possible implementation, the main optical axis of the main lens and the outer optical axis of the outer lens coincide with each other so that the angle of the light passing through the main optical axis does not change.

[0012] In one possible implementation manner, the auxiliary lens and the auxiliary light source are rotated at a certain angle relative to the main lens so that the center of the second light beam passes through the optical center or geometric center of the outer lens.

[0013] In one possible implementation manner, at least two groups of auxiliary lenses and auxiliary light sources are provided and are respectively located on both sides of the main lens and the main light source.

[0014] In one possible embodiment, the outer lens is a plano-convex lens having a first plane, the straight line where the first imaging point and the second imaging point or the second virtual image point are located is parallel to the first plane, the main light source and the auxiliary light source are in different planes and the distance between the main light source and the outer lens is smaller than the distance between the auxiliary light source and the outer lens.

[0015] In one possible implementation, the outer lens is a positive meniscus-shaped concave-convex lens with the concave surface facing outward so that the convex surface is at the incident surface.

[0016] In one embodiment, a reflector is provided between the auxiliary lens and the outer lens, the reflector comprising a first reflective portion and a second reflective portion, the first reflective portion having an arc-shaped cross-section and being bent outward in the middle so that light reflected from the surface of the outer lens can reach the outer lens again after being reflected by the first reflective portion, and the second reflective portion having an arc-shaped cross-section and being bent inward in the middle.

[0017] In one possible implementation, a corrective concave lens is provided between the main lens and the outer lens.

[0018] Compared with the prior art, the direct-type low-beam lens module of the present application has the following beneficial effects:

[0019] The main light source is refracted through the main lens and then through the outer lens. The distance from the first imaging point to the outer lens is equal to the focal length of the outer lens. Relative to emitting a large amount of light near the main lens, a large amount of parallel or nearly parallel light can be refracted to form a main low-beam light pattern. The auxiliary light source is refracted through the auxiliary lens and then through the outer lens. The distance from the second imaging point to the outer lens is equal to the focal length of the outer lens, or the distance from the second virtual image point to the outer lens is equal to the focal length of the outer lens. Relative to emitting a large amount of light near the second imaging point or near the second virtual image point, a large amount of nearly parallel light with a smaller angle with the main light source can be formed to assist in forming a low-beam light pattern. It is mainly used to provide lighting for two zones, which can greatly improve the brightness of the two zones and can eliminate the phenomenon that the edge of the light spot is colored, thereby improving the overall brightness of the light spot.

[0020] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present application will become easily understood. In the accompanying drawings, several embodiments of the present application are shown in an exemplary and non-limiting manner, wherein:

[0022] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0023] Figure 1 A schematic diagram showing the locations of test points of a bicycle headlight;

[0024] Figure 2 A schematic diagram of the horizontal light path of the direct-type low-beam lens module in Example 1 of the present application is shown;

[0025] Figure 3 A schematic diagram of the vertical light path of the direct-type low-beam lens module in Example 1 of the present application is shown;

[0026] Figure 4 A simulation analysis diagram of the luminous intensity when the main light source is turned on alone with a c angle of 30° in Example 1 of the present application is shown;

[0027] Figure 5 A simulation analysis diagram of the luminous intensity when the auxiliary light sources on both sides are turned on individually with an angle d of 20° in Example 1 of the present application is shown;

[0028] Figure 6 A simulation analysis diagram of the luminous intensity when the main light source and the auxiliary light sources on both sides are turned on at the same time with the c angle of 30° and the d angle of 20° in Example 1 of the present application is shown;

[0029] Figure 7 A simulation analysis diagram of the luminous intensity when the main light source is turned on at an angle of 60° in Example 1 of the present application is shown;

[0030] Figure 8 A simulation analysis diagram of the luminous intensity when the left auxiliary light source is turned on with an angle d of 30° in Example 1 of the present application is shown;

[0031] Fig. 9 A simulation analysis diagram of the luminous intensity when the right auxiliary light source is turned on with an angle d of 30° in Example 1 of the present application is shown;

[0032] Fig.10 A simulation analysis diagram of the luminous intensity when the main light source and the auxiliary light sources on both sides are turned on at the same time with the c angle of 60° and the d angle of 30° in Example 1 of the present application is shown;

[0033] Fig.11 A schematic diagram of the horizontal light path of a direct-type low-beam lens module according to Embodiment 2 of the present application is shown;

[0034] Fig.12A schematic diagram of the horizontal light path of a direct-type low-beam lens module in Example 3 of the present application is shown;

[0035] Fig.13 A schematic diagram of the horizontal light path of a direct-type low-beam lens module in Example 4 of the present application is shown;

[0036] Fig.14 A schematic diagram of the vertical light path of the direct-type low-beam lens module of Example 4 of the present application is shown;

[0037] Fig.15 A three-dimensional schematic diagram of the reflective component of the direct-type low-beam lens module of Example 4 of the present application is shown.

[0038] Description of the numbers in the figure:

[0039] 1. Outer lens; 2. Main lens; 3. Auxiliary lens; 4. Main light source; 5. Auxiliary light source; 6. First imaging point; 7. Second imaging point; 8. Second virtual image point; 9. First virtual image point; 10. Light baffle; 11. First plane; 12. Reflector; 13. First reflecting part; 14. Second reflecting part; 15. Reflective bowl; 21. Correcting concave lens; 31. Correcting convex lens. DETAILED DESCRIPTION

[0040] In order to make the purpose, features, and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings 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 those skilled in the art without creative work are within the scope of protection of the present application.

[0041] like Figure 1 As shown in the figure, the test points of the bicycle headlight are shown in the figure. According to the requirements of the national standard GB 22791-2008, the light beam is Figure 1 The brightness values ​​of the test points A and B, and area C shown should meet the following requirements: 400 cd≤A≥0.8; ImaxB≥0.5Imax; C≤120 cd. The brightness at any point within the range formed by the two B points on the V plane and the two B points on 3.5°D should not be lower than 0.5Imax. The brightness at any point within the range formed by 15°U and 15°D and 80°L and 80°R should not be lower than 0.05 cd. The brightness at any point above the H plane should not exceed 120cd. The technical solution of this application is designed based on this standard.

[0042] Embodiment 1:

[0043] like Figure 2 and Figure 3 As shown, the direct-type low-beam lens module includes an outer lens 1, a main lens 2, an auxiliary lens 3, a main light source 4 and an auxiliary light source 5. The main lens 2 is located between the outer lens 1 and the main light source 4. The main lens 2 focuses a divergent first light beam emitted from the center point of the main light source 4 to a first imaging point 6. The distance between the first imaging point 6 and the outer lens 1 is equal to the focal length of the outer lens 1. The auxiliary lens 3 is located between the outer lens 1 and the auxiliary light source 5. The focal length of the auxiliary lens 3 is equal to the focal length of the main lens 2. The auxiliary lens 3 can focus the divergent light emitted from the center point of the auxiliary light source 5 to a second imaging point 7. The distance between the second imaging point 7 and the outer lens 1 is equal to the focal length of the outer lens 1. The actual main light source 4 and the auxiliary light source 5 generally use LED lamp beads, so that the main light source 4 and the auxiliary light source 5 are both a small plane, and an image plane is formed through the main lens 2 and the auxiliary lens 3. The image plane is located at the focal position of the outer lens 1, so it can refract parallel light through the outer lens 1, so that the light concentration is higher and the brightness of the central area is higher.

[0044] like Figure 2 and Figure 3 As shown, since most of the light from the LED light source is concentrated within 130°, the technical solution of the present application and the technical solution of the simulation analysis only consider the light within 130°. The main lens 2 can reduce the included angle of the main light source 4 with a light-emitting angle a of 130° by 160°-190° after refraction to form a first light beam with a light-emitting angle c of 30°-60°. The auxiliary lens 3 can reduce the included angle of the auxiliary light source 5 with a light-emitting angle b of 130° by 150°-160° after refraction to form a second light beam with a light-emitting angle d of 20°-30°. Both the main light source 4 and the auxiliary light source 5 are surface light sources, and the actual light-emitting position forms a plane, but the brightness at the center position is higher and the light-emitting area is smaller, so they can be approximately considered as point light sources. Even as surface light sources, their light-emitting angles are basically close, but they are brighter on the path of the point light source at the center position. Therefore, the path of the point light source at the center position can be taken as the main path range of the light source. Figure 2 and Figure 3 As shown, the main optical axis of the main lens 2 and the outer optical axis of the outer lens 1 coincide with each other so that the angle of the light passing through the main optical axis does not change. The main optical axis and the outer optical axis are the positions of the dotted lines in the figure, which makes it easier to control the illumination direction of the car lights.

[0045] like Figure 2 and Figure 3 As shown, the auxiliary lens 3 and the auxiliary light source 5 are rotated at a certain angle relative to the main lens 2 so that the center of the second light beam passes through the optical center or geometric center of the outer lens 1. For a lens without a fixed optical center, it is sufficient to pass through the geometric center. In this way, the deviation angle of the second light beam formed by the auxiliary light source 5 is smaller and the distance away from the center position is also smaller, ultimately forming a brighter illumination area.

[0046] like Figure 2 and Figure 3 As shown, at least two groups of auxiliary lenses 3 and auxiliary light sources 5 are provided and located on both sides of the main lens 2 and the main light source 4, respectively, so that symmetrical lighting can be formed, so that the light brightness on both sides is basically the same, and the overall lighting is more uniform.

[0047] like Figure 2 and Figure 3 As shown, the outer lens 1 is a plano-convex lens with a first plane 11, the straight line where the first imaging point 6 and the second imaging point 7 or the second virtual image point are located is parallel to the first plane 11, the main light source 4 and the auxiliary light source 5 are in different planes, and the distance between the main light source 4 and the outer lens 1 is smaller than the distance between the auxiliary light source 5 and the outer lens 1. In this design, the main light source 4 does not need to use multiple lenses, and the structure is relatively simple, that is, the position of the lens is changed according to the focal length of the auxiliary lens 3 and the main lens 2, and it is ensured that the distance from the first imaging point 6 and the second imaging point 7 to the outer lens 1 is equal to the focal length of the outer lens 1.

[0048] like Figure 2 As shown, the refraction path of the first light beam of the main light source 4 is represented by a solid line. After passing through the main lens 2, it is focused at the first imaging point 6, and then refracted through the outer lens 1. The refraction path of the second light beam of the auxiliary light source 5 is represented by a dotted line or a double-dash line. In theory, the center point of the main light source 4 can refract parallel light rays, but the main light source 4 is a plane. Therefore, after the first light beam is refracted by the lens, a large number of light rays are finally formed that are close to parallel, but there is a small angle between the light rays. Most of the final light rays of the second light beam of the auxiliary light source 5 are more divergent and at a smaller angle than the first light beam. The symmetrically arranged auxiliary light sources 5 can make up for the asymmetry of this angle, so that a symmetrical light pattern is finally formed. The closer the distance between the main light source 4 and the auxiliary light source 5, the more concentrated the light spot formed, which has a higher utilization efficiency, that is, using less power to achieve greater light brightness.

[0049] like Figure 3 As shown, in order to form a cut-off line above the light pattern, the light source is set on the upper half of the lens, so that the light utilization rate is higher. If a baffle is used to block the light, the utilization rate will decrease, but a clearer cut-off line will be formed to avoid dazzling the oncoming drivers.

[0050] In order to confirm the technical advantages of the present application, a lighting simulation analysis was carried out. According to conventional design, three light sources with the same power were matched with three identical lenses. According to the refraction trajectory of the scattered light at 130° at the center position, a light beam with a luminous angle of 90° can be formed, and then refracted through the same outer lens 1. The light source at the center position of the three light sources serves as the main light source 4, and the light sources on both sides serve as auxiliary light sources 5. The maximum luminous intensity is about 10,000 cd.

[0051] like Figure 4 As shown, by adjusting the refraction angle of the main lens 2, a first light beam with a luminous angle c of 30° is formed and incident on the outer lens 1. Through software simulation analysis, when the main light source 4 is lit, the luminous flux is 125lm, and the maximum luminous intensity is 5677.21cd. Figure 5 As shown, by adjusting the refraction angle of the auxiliary lens 3, a first light beam with a luminous angle d of 20° is formed to enter the outer lens 1. When the two auxiliary light sources 5 are lit, the luminous flux is 353lm, and the maximum luminous intensity is 2520.93cd. Figure 6 As shown, when the main light source 4 and the auxiliary light source 5 are lit at the same time, the luminous flux is 478lm, and the maximum luminous intensity is 13677.3cd. The brightest light area of ​​this embodiment is concentrated in zone 2, which is particularly suitable for use at a speed of 50 kilometers per hour.

[0052] like Figure 7 As shown, by adjusting the refraction angle of the main lens 2, a first light beam with a luminous angle c of 60° is formed and incident on the outer lens 1. Through software simulation analysis, when the main light source 4 is lit, the luminous flux is 217lm, and the maximum luminous intensity is 7489.18cd. Figure 8 As shown, by adjusting the refraction angle of the auxiliary lens 3, a first light beam with a luminous angle d of 30° is formed to enter the outer lens 1. When the auxiliary light source 5 on the left is lit, the luminous flux is 204lm, and the maximum luminous intensity is 2601.86cd. Fig. 9 As shown, by adjusting the refraction angle of the auxiliary lens 3, a first light beam with a luminous angle d of 30° is formed to enter the outer lens 1. When the auxiliary light source 5 on the right is lit, the luminous flux is 204lm, and the maximum luminous intensity is 2638.61cd. Fig.10 As shown, when the main light source 4 and the auxiliary light source 5 are lit at the same time, the luminous flux is 624lm, and the maximum luminous intensity is 11982.1cd. The light of this embodiment has a certain illumination intensity in both zone 2 and zone 1, and is suitable for use at a speed of 25 kilometers per hour.

[0053] Embodiment 2:

[0054] like Fig.11As shown, the auxiliary lens 3 can focus the divergent second light beam emitted from the center point of the auxiliary light source 5 to the second imaging point 7. The distance between the second imaging point 7 and the outer lens 1 is less than the focal length of the outer lens 1. After being refracted by the correcting convex lens 31, the second light beam with a smaller luminous angle is formed. The second light beam has a second virtual image point 8. The distance between the second virtual image point 8 and the outer lens 1 is equal to the focal length of the outer lens 1. The distance between the second virtual image point 8 and the outer lens 1 can be increased by the correcting convex lens 31 so that it is equal to the focal length of the outer lens 1. In this way, the auxiliary light source 5 and the main light source 4 can be arranged on the same circuit board, and the main lens 2 and the auxiliary lens 3 can also be arranged as an integrated structure. Of course, in order to ensure higher light efficiency, the optical axes of the auxiliary lens 3 and the correcting convex lens 31 should also be as close to the optical center of the outer lens 1 as possible. When the corrected second light beam passes through the correcting convex lens 31 and enters the outer lens 1, the angle is within the range of 20°-30°. The path of the double-dash line light in the figure has not been corrected, and its angle is larger, and the light is more dispersed.

[0055] Embodiment 3:

[0056] like Fig.12 As shown, a corrective concave lens 21 is provided between the main lens 2 and the outer lens 1. The corrective concave lens 21 needs to be arranged behind the first imaging point 6, so that the auxiliary light source 5 and the main light source 4 can be arranged on the same circuit board, and the main lens 2 and the auxiliary lens 3 can also be arranged into an integrated structure, and the first virtual image point 9 is formed by the corrective concave lens 21. Although the distance from the first imaging point 6 to the outer lens 1 is greater than the focal length of the outer lens, the distance from the first virtual image point 9 to the outer lens 1 is the focal length of the outer lens 1. In this embodiment, a corrective convex lens 31 can also be used between the auxiliary lens 3 and the outer lens 1, as long as the distance from the second virtual image point 8 to the outer lens 1 is equal to the focal length of the outer lens 1.

[0057] Embodiment 4:

[0058] like Fig.13 and Fig.14 As shown, the outer lens 1 is a positive meniscus-shaped concave-convex lens with the concave surface facing outward so that the convex surface is on the incident surface. This can reduce the angle at which the center of the light beam of the auxiliary light source 5 enters the outer lens 1, increase the brightness of the auxiliary light source 5 in the central area, and make the illumination more concentrated, that is, the brightness of zone 2 is higher.

[0059] like Fig.13 and Fig.14 As shown, a reflector 12 is provided between the auxiliary lens 3 and the outer lens 1. The reflector 12 includes a first reflective portion 13 and a second reflective portion 14. The first reflective portion 13 is arc-shaped in cross section and is bent outward in the middle so that the light reflected on the surface of the outer lens 1 can reach the outer lens 1 again after being reflected by the first reflective portion 13. The second reflective portion 14 is arc-shaped and is bent inward in the middle. Fig.13As shown, a light baffle 10 is used above the main lens 2 so that the final light pattern can have an upper cutoff line. The middle area of ​​the light baffle 10 is arranged in an arc shape to reflect a certain amount of light. A reflective bowl 15 is arranged below the main lens 2 to further reflect the light from the light baffle 10 so that the light utilization rate is higher. The reflector 12 is arranged on both sides of the auxiliary lens 3 and extends to the outward lens 1. The reflector 12, the light baffle 10 and the reflective bowl 15 can adopt an integrated structure. The reflector 12 mainly reflects the light on the left and right sides, the light baffle 10 blocks the light above, and the reflective bowl 15 reflects the light from the light baffle to improve the light utilization rate, and finally mainly provides close-range illumination.

[0060] like Fig.15 As shown, the reflective component is formed into an integrated structure by a reflector 12, a light-shaped baffle 10 and a reflective bowl 15. The reflective bowl 15 is located below the light-shaped baffle 10, and the reflector 12 is located on both sides of the light-shaped baffle 10. The light-shaped baffle 10 and the reflective bowl 15 are connected through the reflector 12, which can improve the utilization rate of the light and increase the light intensity of zone 1.

[0061] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this application can be executed in parallel, sequentially or in different orders, as long as the expected results of the technical solution of this application can be achieved, and this document does not limit this.

[0062] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0063] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A direct-type low-beam lens module, comprising an outer lens (1), a main lens (2), an auxiliary lens (3), a main light source (4) and an auxiliary light source (5), wherein the main lens (2) is located between the outer lens (1) and the main light source (4), and characterized in that: The main lens (2) focuses a divergent first light beam emitted from the center point of the main light source (4) onto a first imaging point (6); the distance between the first imaging point (6) and the outer lens (1) is equal to or greater than the focal length of the outer lens (1); the auxiliary lens (3) is located between the outer lens (1) and the auxiliary light source (5). The auxiliary lens (3) is capable of focusing the divergent light emitted from the center point of the auxiliary light source (5) onto a second imaging point (7), and the distance between the second imaging point (7) and the outer lens (1) is equal to the focal length of the outer lens (1). Alternatively, the auxiliary lens (3) is capable of focusing a divergent second light beam emitted from the center point of the auxiliary light source (5) onto the second imaging point (7), the distance between the second imaging point (7) and the outer lens (1) being less than the focal length of the outer lens (1), and then being refracted by the correcting convex lens (31) to form a second light beam with a smaller luminous angle, the second light beam having a second virtual image point (8), and the distance between the second virtual image point (8) and the outer lens (1) being equal to the focal length of the outer lens (1); The outer lens (1) is a positive meniscus-shaped concave-convex lens with the concave surface facing outwards so that the convex surface is on the incident surface. A reflector (12) is provided between the auxiliary lens (3) and the outer lens (1). The reflector (12) comprises a first reflective portion (13) and a second reflective portion (14). The first reflective portion (13) has an arc-shaped cross section and is bent outwards in the middle so that light reflected from the surface of the outer lens (1) can reach the outer lens (1) again after being reflected by the first reflective portion (13). The second reflective portion (14) has an arc-shaped cross section and is bent inwards in the middle.

2. The direct-type low-beam lens module according to claim 1, characterized in that: The main lens (2) can reduce the included angle of the main light source (4) after refraction to form a first light beam with a light-emitting angle of 30°-60°.

3. The direct-type low-beam lens module according to claim 2, characterized in that: The auxiliary lens (3) can reduce the included angle of the auxiliary light source (5) after refraction to form a second light beam with a light emission angle of 20°-30°.

4. The direct-type low-beam lens module according to claim 1, characterized in that: The main optical axis of the main lens (2) and the outer optical axis of the outer lens (1) coincide with each other so that the angle of light passing through the main optical axis does not change.

5. The direct-type low-beam lens module according to claim 1, characterized in that: The auxiliary lens (3) and the auxiliary light source (5) are rotated at a certain angle relative to the main lens (2) so that the center of the second light beam passes through the optical center or geometric center of the outer lens (1).

6. The direct-type low-beam lens module according to claim 1, characterized in that: The auxiliary lens (3) and the auxiliary light source (5) are provided with at least two groups, which are respectively located on both sides of the main lens (2) and the main light source (4).

7. The direct-type low-beam lens module according to claim 1, characterized in that: The outer lens (1) is a plano-convex lens having a first plane (11), the straight line where the first imaging point (6) and the second imaging point (7) or the second virtual image point (8) are located is parallel to the first plane (11), the main light source (4) and the auxiliary light source (5) are located in different planes, and the distance between the main light source (4) and the outer lens (1) is smaller than the distance between the auxiliary light source (5) and the outer lens (1).

8. The direct-type low-beam lens module according to any one of claims 1 to 6, characterized in that: A light pattern baffle (10) is provided above the main lens (2) so that the final light pattern can have an upper cutoff line; the middle area of ​​the light pattern baffle (10) is arranged in an arc shape so as to reflect a certain amount of light; a reflective bowl (15) is provided below the main lens (2) so as to further reflect the light from the light pattern baffle (10) so as to increase the light utilization rate; and the reflector (12) is arranged on both sides of the auxiliary lens (3) and extends towards the outer lens (1).

9. The direct-type low-beam lens module according to claim 8, characterized in that: The reflector (12), the light-shaped baffle (10) and the reflective bowl (15) adopt an integrated structure; the reflective bowl (15) is located below the light-shaped baffle (10); the reflector (12) is located on both sides of the light-shaped baffle (10); and the light-shaped baffle (10) and the reflective bowl (15) are connected via the reflector (12).

10. The direct-type low-beam lens module according to claim 1, characterized in that: A corrective concave lens (21) is provided between the main lens (2) and the outer lens (1).

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