Lighting module and motor vehicle

Abstract

The present application provides a lighting module (100), which comprises: a light source (10), the light source being configured to emit light; a light collector (20), the light collector having a reflective surface (21), the reflective surface being configured to collect the light emitted from the light source, and reflect the light in a light beam that propagates in a main emergent light direction (X) of the lighting module; a first lens (30), which is arranged in front of the corresponding reflective surface, the first lens being configured to transmit at least a portion of the light beam; and a second lens (40), the second lens being configured to project the light beam in the main emergent light direction, and form an image of the reflective surface.

Description

Lighting module and motor vehicle

[0001] The present application relates to the technical field of lighting, more specifically a lighting module and a motor vehicle.

[0002] In the technical field of lighting, various lighting or signalling devices are known for providing light for lighting or signalling. For example, vehicle lamps are used in motor vehicles to provide lighting or signalling functions, in order to ensure safe travel or provide an ornamental function.

[0003] Referring to patent publication document CN112513522A, a lighting module known to the applicant comprises a light source, a light collector and a lens. A reflective surface of the light collector can collect light emitted by the light source, and reflect the light in a light beam, and then project this light beam by means of a lens, forming an image of the reflective surface of the light collector. In a scenario in which the focal length of the lens is fixed, in order to more clearly form an image of the reflective surface of the light collector, the reflective surface is generally arranged near the focal point of the lens, which causes the whole lighting module to have a larger size in the main emergent light direction. Moreover, it is further necessary to arrange an optical structure on this single lens to form light that satisfies regulatory marking measurement point requirements, which causes the style of the appearance of the lens to lack distinction and visual appeal.

[0004] Therefore, how to provide a lighting module with a more compact structure is indeed an urgent need at present.Summary of the Invention

[0005] An objective of the present application is to overcome at least one of the problems and shortcomings in the prior art.

[0006] A first aspect of the present application provides a lighting module, which comprises:

[0007] a light source, the light source being configured to emit light;

[0008] a light collector, the light collector having a reflective surface, the reflective surface being configured to collect the light emitted from the light source, and reflect the light in a light beam that propagates in a main emergent light direction of the lighting module;

[0009] a first lens, which is arranged in front of the corresponding reflective surface, the first lens being configured to transmit at least a portion of the light beam; and

[0010] a second lens, the second lens being configured to project the light beam in the main emergent light direction, and form an image of the reflective surface.

[0011] In some embodiments, the first lens has an object focal point and a virtual image focal point, the object focal point of the first lens is located at a position less than 10 mm from the reflective surface, and the virtual image focal point of the first lens is located behind the corresponding reflective surface;

[0012] the second lens has an object focal point, and a distance between the object focal point of the second lens and the virtual image focal point of the first lens is less than 10 mm.

[0013] In some embodiments, the object focal point of the first lens is located on the reflective surface;

[0014] the object focal point of the second lens coincides with the virtual image focal point of the first lens.

[0015] In some embodiments, the reflective surface comprises a rear edge that forms a cutoff line in the light beam.

[0016] In some embodiments, the object focal point of the first lens is located at a position less than 10 mm from the rear edge.

[0017] In some embodiments, the object focal point of the first lens is located on the rear edge.

[0018] In some embodiments, multiple optical structures are provided on the first lens, the optical structure is a small protrusion or a small recess, and the multiple optical structures are configured to form light that satisfies regulatory marking measurement point requirements;

[0019] the optical structure is not provided on the second lens.

[0020] In some embodiments, the light source comprises multiple light-emitting diodes, the multiple light-emitting diodes being spaced apart from each other in a transverse direction, and the transverse direction being perpendicular to the main emergent light direction;

[0021] the light collector comprises multiple reflective surfaces, the multiple reflective surfaces being arranged in the transverse direction, and the multiple reflective surfaces being in one-to-one correspondence with the multiple light-emitting diodes;

[0022] the first lens comprises one or more segments, each of the segments corresponding to at least one of the reflective surfaces.

[0023] In some embodiments, the first lens comprises multiple virtual image focal points that correspond to multiple segments, the multiple virtual image focal points being spaced apart from each other;

[0024] the second lens comprises multiple sub-parts, and the second lens comprises multiple object focal points that correspond to the multiple sub-parts, the multiple object focal points of the second lens coinciding with the multiple virtual image focal points of the first lens in one-to-one correspondence;

[0025] a thickness variation of a main body portion of the second lens is less than 3 mm.

[0026] In some embodiments, the first lens comprises a virtual image focal point that corresponds to multiple segments simultaneously.

[0027] An incident light face and an emergent light face of the second lens form a smooth continuous spherical surface, the second lens having an object focal point, and the object focal point of the second lens coinciding with the virtual image focal point of the first lens.

[0028] In some embodiments, the light beam that is formed by reflection from the reflective surface is all transmitted to the second lens by means of the first lens;

[0029] or, the light beam that is formed by reflection from a portion of the reflective surface is transmitted to the second lens by means of the first lens, and the light beam that is formed by reflection from another portion of the reflective surface is directly transmitted to the second lens.

[0030] In some embodiments, a focal length of the second lens is greater than 500 mm, and a distance from the second lens to the light source is less than 400 mm;

[0031] a thickness of the first lens is 2 - 7 mm, and a thickness of the second lens is less than 7 mm.

[0032] In some embodiments, the second lens is an integral member;

[0033] the first lens is an integral member or comprises multiple separated segments;

[0034] the first lens and the second lens are assembled together, or integrated into an integral member.

[0035] In some embodiments, the lighting module is configured to act as a low-beam lamp and / or a high-beam lamp of a motor vehicle.

[0036] A second aspect of the present application provides a motor vehicle, which comprises the lighting module provided in the first aspect and the abovementioned embodiments.Brief Description of the Drawings

[0037] is a structural schematic drawing of a lighting module provided in a first embodiment of the present application;

[0038] is an optical path schematic drawing of the lighting module shown in;

[0039] is a simulation drawing of an emitted beam pattern of the lighting module shown in;

[0040] is a structural schematic drawing of a lighting module provided in a second embodiment of the present application;

[0041] is a simulation drawing of an emitted beam pattern of the lighting module shown in;

[0042] is a structural schematic drawing of a lighting module provided in a third embodiment of the present application.Detailed Description of Embodiments

[0043] Embodiments of the present application will be described in detail below with reference to the drawings. It should be understood that the embodiments of the present application are mainly for illustrating possible implementations of the technical solution of the present application and should not be construed as limiting the technical solution of the present application. In the present description, identical or similar components are indicated by identical or similar reference numerals.

[0044] is a structural schematic drawing of a lighting module 100 provided in a first embodiment of the present application;is an optical path schematic drawing of the lighting module 100 shown in;is a simulation drawing of an emitted beam pattern of the lighting module 100 shown in. As shown in Figs. 1 - 3, a first embodiment of the present application provides a lighting module 100, and this lighting module 100 may act as a low-beam lamp (LB) or a high-beam lamp (HB) of a motor vehicle. Here, the low-beam lamp and the high-beam lamp may be an ordinary low-beam lamp and high-beam lamp, or may also be a low-beam lamp and a high-beam lamp that can self-adaptively regulate an emitted beam pattern. The lighting module 100 may project light in a main emergent light direction X, and, when the lighting module 100 is mounted on a motor vehicle, the main emergent light direction X, for example, may be in front of the motor vehicle, to illuminate a position in front of the motor vehicle, improving driving safety.

[0045] This lighting module 100 comprises a light source 10, a light collector 20, a first lens 30 and a second lens 40. The light source 10 is configured to emit light, and a light emission direction of the light source 10 may be approximately in a height direction Z, the height direction Z being perpendicular to the main emergent light direction X. The light source 10 may comprise multiple light-emitting diodes, the multiple light-emitting diodes being spaced apart from each other in a transverse direction Y, and the transverse direction Y being perpendicular to the main emergent light direction X and the height direction Z.shows three light-emitting diodes, the three light-emitting diodes being respectively marked 10a, 10b and 10c, and, in another embodiment, the number of light-emitting diodes may also be any other number greater than one, such as 5, 7, 9, etc. The three light-emitting diodes may be arranged on the same circuit board 15. The light collector 20 has a reflective surface 21, the reflective surface 21 being configured to collect the light emitted from the light source 10, and reflect the light in a light beam that propagates in the main emergent light direction X of the lighting module 100. The light collector 20 may comprise multiple reflective surfaces 21; the multiple reflective surfaces 21 may be formed on the light collector 20 which is an integral whole, or also may be respectively formed on multiple separated sub-light collectors of the light collector 20. The multiple reflective surfaces 21 are arranged in the transverse direction Y, and the multiple reflective surfaces 21 are arranged in one-to-one correspondence with the multiple light-emitting diodes; that is, each reflective surface 21 is configured to collect the light emitted by one corresponding light-emitting diode. The first lens 30 is arranged in front of the corresponding reflective surface 21, the first lens 30 being configured to transmit forward at least a portion of the light beam that is formed by reflection from the reflective surface 21. The second lens 40 is configured to project the light beam in the main emergent light direction X, and form an image of the reflective surface 21. The second lens 40 may be an integral member, and the first lens 30 may be an integral member or comprises multiple separated segments. The first lens 30 and the second lens 40 are assembled together, the two, for example, being directly assembled to each other, or being respectively assembled to the light collector 20 or another component; the two may also form an integral member by means of injection moulding, and the present application does not specifically restrict the connection relationship between the first lens 30 and the second lens 40.

[0046] In the present embodiment, by means of simultaneously providing the first lens 30 and the second lens 40, the first lens 30 may form a pattern of the reflective surface 21 into a virtual image that is located behind the reflective surface 21, and the second lens 40 is further used to project this virtual image as an emitted beam pattern, at which time the shape of the emitted beam pattern is the same as the shape of the reflective surface 21. With the provision of the first lens 30, it is sufficient to arrange the reflective surface 21 near the object focal point of the first lens 30, rather than necessarily near the object focal point of the second lens 40; therefore, by means of arranging a suitable first lens 30, such as a first lens 30 with a shorter object focal length, the reflective surface 21 is arranged at a position that is nearer the second lens 40. This can reduce the size of the lighting module 100 in the main emergent light direction X, such that the structure of the lighting module 100 is more compact, and a lighting module 100 with a smaller volume has important significance in motor vehicle applications.

[0047] In order to cause the image of the reflective surface 21 that is formed by the second lens 40 to be clearer, the first lens 30 can be configured to have an object focal point f31 and a virtual image focal point f32. The object focal point f31 of the first lens 30 is located at a position that is less than 10 mm from the reflective surface 21. Preferably, the object focal point f31 of the first lens 30 can be located on the reflective surface 21. The virtual image point f32 of the first lens 30 is located behind the corresponding reflective surface 21. Correspondingly, the second lens 40 has an object focal point f41, and a distance between the object focal point f41 of the second lens 40 and the virtual image focal point f32 of the first lens 30 is less than 10 mm. Preferably, the object focal point f31 of the second lens 40 coincides with the virtual image focal point f32 of the first lens 30. This can enable the lighting module 100 to form a clearer image of the reflective surface 21.

[0048] When the lighting module 100 acts as a low-beam lamp of a motor vehicle, the reflective surface 21 may comprise a rear edge 211 that forms a cutoff line in the light beam. At this time, in order to form a clear cutoff line, the object focal point f31 of the first lens 30 can be located at a position that is less than 10 mm from the rear edge 211. Preferably, the object focal point f31 of the first lens 30 is located on the rear edge 211.

[0049] In the lighting module 100 of the first embodiment, the focal length of the second lens 40 is generally greater than 500 mm, but the distance from the second lens 40 to the light source 10 may be less than 400 mm, and even less than 300 mm. Moreover, with the presence of the first lens 30, the first lens 30 and the second lens 40 are both enabled to have a smaller thickness. For example, the thickness of the first lens 30 is 2 - 7 mm, and the thickness of the second lens 40 is less than 7 mm.

[0050] In some embodiments, multiple optical structures (not shown) may be provided on the first lens 30; these optical structures may be small protrusions or small recesses, and the optical structures are configured to form light that satisfies regulatory marking measurement point requirements. This light is generally located above a cutoff line to illuminate traffic signs, facilitating a driver to see traffic signs clearly and improving driving safety. These optical structures may be arranged on an incident light face 31 and / or an emergent light face 32 of the first lens 30, and the present application does not specifically restrict the specific positions of these optical structures. Since the optical structure is already arranged on the first lens 30, correspondingly, an optical structure design on the second lens 40 can be dispensed with; that is, no optical structure is provided on the second lens 40, which causes the second lens 40 that is located at a foremost end of the whole lighting module 100 to appear more distinct, smoother and more visually appealing, so as improve the style of appearance of the lighting module 100.

[0051] In the first embodiment, the first lens 30 comprises multiple segments 35, each segment 35 corresponding to at least one reflective surface 21. As shown in, the first lens 30 comprises three segments 35, each segment corresponding to one reflective surface 21. In some other embodiments, the first lens 30 may only comprise one segment 35, or may also comprise 2, 4 or any other number of segments greater than one. Each segment 35 may correspond to one, two or more reflective surfaces 21.

[0052] In the first embodiment, each segment 35 has a corresponding object focal point f31 and virtual image focal point f32; that is, the first lens 30 comprises multiple virtual image focal points f32 that correspond to the multiple segments 35, and these multiple virtual image focal points f32 are spaced apart from each other. The second lens 40 comprises multiple sub-parts 45, each sub-part 45 having a corresponding object focal point f41; that is, the second lens 40 comprises multiple object focal points f41 that correspond to the multiple sub-parts 45, and the multiple object focal points f41 of the second lens 40 coincide with or are near the multiple virtual image focal points f32 of the first lens 30 in one-to-one correspondence, wherein here “near” means that the two are less than 10 mm from each other. For example, three segments 35 of the first lens 30 have three corresponding virtual image focal points f32, and the three sub-parts 45 of the second lens 40 have three corresponding object focal points f41, the three virtual image focal points f32 coinciding with the three object focal points f41 in one-to-one correspondence. The three sub-parts 35 of the second lens 40 can respectively project the shapes of the three reflective surfaces 21 in emitted beam patterns, and the three emitted beam patterns are superimposed on one another to form a complete low-beam beam pattern or high-beam beam pattern. With the presence of the first lens 30, a main body portion of the second lens 40 may be configured more smoothly, for example a thickness variation of the main body portion of the second lens 40 being less than 3 mm, wherein here “main body portion” means a middle portion of the second lens 40 excluding left and right end parts. Consequently, the second lens 40 looks extremely uniform overall, without excessively large sudden changes in thickness, which can further improve the style of appearance of the lighting module 100.

[0053] is a structural schematic drawing of a lighting module 100 provided in a second embodiment of the present application;is a simulation drawing of an emitted beam pattern of the lighting module 100 shown in. As shown in Figs. 4 - 5, in the second embodiment, the first lens 30 comprises a virtual image focal point f32 that corresponds to multiple segments 35 simultaneously. Correspondingly, the second lens 40 has an object focal point f41, and the object focal point f41 of the second lens coincides with or is near the virtual image focal point f32 of the first lens 30. In this case, an incident light face 41 and an emergent light face 42 of the second lens 40 form a smooth continuous spherical surface, with no segment line that is visible to the naked eye, which may further improve the style of the lighting module 100. Other features of the lighting module 100 in the second embodiment are identical or similar to the corresponding features of the lighting module 100 in the first embodiment, and are not restated here.

[0054] In the first embodiment and the second embodiment described above, the light beam that is formed by reflection from the reflective surface 21 is all transmitted to the second lens 40 by means of the first lens 30. That is, all the light received by the second lens 40 comes from the first lens 30. However, in some other embodiments, only the light beam that is formed by reflection from a portion of the reflective surface 21 is transmitted to the second lens 40 by means of the first lens 30, and the light beam that is formed by reflection from another portion of the reflective surface 21 is directly transmitted to the second lens 40 without passing through the first lens 30. That is, a portion of light received by the second lens 40 comes from the first lens 30, and a portion comes directly from the reflective surface 21 without passing through the first lens 30.

[0055] is a structural schematic drawing of a lighting module 100 provided in a third embodiment of the present application. As shown in, a first lens 30 only includes two segments 35, the two segments 35 being respectively located at two ends in a transverse direction Y, and the first lens 30 is not provided in front of a reflective surface 21 located in the middle. In this case, a light beam reflected from the reflective surface 21 in the middle may be directly incident on the second lens 40, and does not pass through the first lens 30. However, the light beams reflected by the reflective surfaces 21 at both left and right ends first pass through two corresponding segments 35 of the first lens 30 and are then incident on the second lens 40. This is because the light beam formed by the middle reflective surface 21 is mainly used for emitting a widening beam pattern, and an object focal length itself of the corresponding second lens 40 is shorter, and it is not necessary to provide an extra first lens 30, which may improve light output efficiency.

[0056] Embodiments of the present application also provide a motor vehicle, which may comprise the lighting module 100 according to any one of the embodiments above. This motor vehicle may be an electric vehicle, a fuel vehicle or a hybrid vehicle.

[0057] Although the present application has been described in view of the drawings, the embodiments disclosed in the drawings are intended to exemplarily illustrate preferred embodiments of the present application and should not be construed as limiting the present application. The dimensional proportions in the drawings are merely schematic, and must not be construed as limiting the present application.

[0058] Although some embodiments of the general concept of the present application have been shown and explained, those skilled in the art will understand that the present application may comprise other further equivalent embodiments without departing from the general inventive concept of the present application, and the scope of protection of the present application is defined by the claims.

Claims

1.A lighting module (100), characterized by comprising:a light source (10), the light source being configured to emit light;a light collector (20), the light collector having a reflective surface (21), the reflective surface being configured to collect the light emitted by the light source, and reflect the light in a light beam that propagates along a main emergent light direction (X) of the lighting module;a first lens (30), which is arranged in front of the corresponding reflective surface, the first lens being configured to transmit at least a portion of the light beam; anda second lens (40), the second lens being configured to project the light beam in the main emergent light direction, and form an image of the reflective surface.2.A lighting module according to Claim 1, wherein the first lens (30) has an object focal point (f31) and a virtual image focal point (f32), the object focal point of the first lens is located at a position less than 10 mm from the reflective surface, and the virtual image focal point of the first lens is located behind the corresponding reflective surface;the second lens has an object focal point (f41), and a distance between the object focal point of the second lens and the virtual image focal point of the first lens is less than 10 mm.3.A lighting module according to Claim 2, wherein the object focal point of the first lens is located on the reflective surface;the object focal point of the second lens coincides with the virtual image focal point of the first lens.4.A lighting module according to Claim 1, wherein the reflective surface (21) comprises a rear edge (211) that forms a cut-off line in the light beam.5.A lighting module according to Claim 4, wherein the object focal point of the first lens is located at a position less than 10 mm from the rear edge.6.A lighting module according to Claim 5, wherein the object focal point of the first lens is located on the rear edge.7.A lighting module according to Claim 1, wherein multiple optical structures are provided on the first lens (30), the optical structure is a small protrusion or a small recess, and the multiple optical structures are configured to form light that satisfies regulatory marking measurement point requirements;the optical structure is not provided on the second lens (40).8.A lighting module according to Claim 1, wherein the light source comprises multiple light-emitting diodes (10a, 10b, 10c), the multiple light-emitting diodes being spaced apart from each other in a transverse direction (Y), and the transverse direction being perpendicular to the main emergent light direction;the light collector comprises multiple reflective surfaces, the multiple reflective surfaces being arranged in the transverse direction, and the multiple reflective surfaces being in one-to-one correspondence with the multiple light-emitting diodes;the first lens comprises one or more segments (35), each of the segments corresponding to at least one of the reflective surfaces.9.A lighting module according to Claim 8, wherein the first lens comprises multiple virtual image focal points that correspond to multiple segments, the multiple virtual image focal points being spaced apart from each other;the second lens comprises multiple sub-parts (45), and the second lens comprises multiple object focal points that correspond to the multiple sub-parts, the multiple object focal points of the second lens coinciding with the multiple virtual image focal points of the first lens in one-to-one correspondence;a thickness variation of a main body portion of the second lens is less than 3 mm.10.A lighting module according to Claim 8, wherein the first lens comprises a virtual image focal point that corresponds to multiple segments simultaneously;an incident light face (41) and an emergent light face (42) of the second lens form a smooth continuous spherical surface, the second lens having an object focal point, and the object focal point of the second lens coinciding with the virtual image focal point of the first lens.11.A lighting module according to Claim 8, wherein the light beam that is formed by reflection from the reflective surface is all transmitted to the second lens by means of the first lens;or, the light beam that is formed by reflection from a portion of the reflective surface is transmitted to the second lens by means of the first lens, and the light beam that is formed by reflection from another portion of the reflective surface is directly transmitted to the second lens.12.A lighting module according to Claim 1, wherein a focal length of the second lens is greater than 500 mm, and a distance from the second lens to the light source is less than 400 mm;a thickness of the first lens is between 2 mm to 7 mm, and a thickness of the second lens is less than 7 mm.13.A lighting module according to Claim 1, wherein the second lens is an integral member;the first lens is an integral member or comprises multiple separated segments;the first lens and the second lens are assembled together, or integrated into an integral member.14.A lighting module according to Claim 1, wherein the lighting module is configured to act as a low-beam lamp and / or a high-beam lamp of a motor vehicle.15.A motor vehicle, characterized in that the motor vehicle comprises the lighting module according to any one of Claims 1 - 14.

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