CN218863984U - Light emitting module and vehicle - Google Patents

Abstract

The utility model relates to a vehicle that is used for light emitting module of vehicle and includes this light emitting module. The light emitting module (1) has a main light exit direction (H) and comprises: a heat sink (10) for mounting and fixing other components of the light emitting module, having a mounting face (7) parallel to a main light exit direction; a printed circuit board mounted on the mounting surface; light sources (4, 5) mounted on the printed circuit board; a light reflecting member (20) mounted on the printed circuit board, reflecting light emitted from the light sources in a main light emitting direction, and having reflectors (2, 3) assigned to the light sources one-to-one; a lens holder (8) mounted on the heat sink; and a lens (9) mounted on the lens holder for projecting the light reflected by the light reflecting member in a main light-emitting direction. The lens is configured such that its light incident surface is divided into at least two regions having different curvatures and different focal lengths, and these regions are fitted with reflectors one-to-one or one-to-many to realize the respective light emitting functions.

Description

Light emitting module and vehicle

Technical Field

The utility model relates to a technical field for light emitting module of vehicle.

Background

Various light emitting modules for vehicles are known in the art to produce an illumination beam, a signal beam, or a combination of both.

For example, the document CN216158966U discloses a lighting module for a vehicle, which has a main light exit direction and comprises a light source for different light functions, a reflector which receives and reflects light emitted by the light source in the main light exit direction, a carrier on which the light source and the reflector are arranged, and lenses which project light reflected by the light source via the respective reflector. The solution of this document reduces the overall height dimension of the light emitting module by arranging the light sources and the corresponding reflectors, which fulfill different light functions, on the same side of the carrier. Also, the lenses in this document may have sections assigned to the respective reflectors, so that different light distributions can be formed by matching the lens sections with the assigned reflectors.

In recent years, with the trend of vehicle styling, especially with the vigorous development of electric vehicles, more requirements are put on the shape and size of a light emitting module as an important element for the styling of the head and the tail of a vehicle. For example, in an electric vehicle without a front grill, it is desirable that light emitting modules arranged at both ends of a vehicle head be as compact as possible due to a need for styling, and in particular, a dimension in an X direction, which is a vehicle forward direction, a dimension in a Z direction, which is a direction perpendicular to both the vehicle forward direction and a ground surface, and a dimension in a Y direction, which is a direction perpendicular to the vehicle forward direction and parallel to the ground surface, are as small as possible. Meanwhile, the light emitting module with the light emitting effect like a long and narrow lamp is expected to be especially suitable for the designed steep shape at two ends of the vehicle head so as to improve the dynamic aesthetic effect of the vehicle. For this reason, it is desirable that a lens, which is one of the main components of the light emitting module, can be sufficiently thin, such as a thickness of less than 5mm for a light emitting module of a total length of 120mm, and it is also desirable that an irregular lens having a large change in curvature adapted to a steep region of a vehicle body can be employed. On the basis of these limitations, it is also required that the light emitting module be capable of implementing all lighting functions or signaling functions and be capable of fine design of the respective light emitting types of the implemented light emitting functions to meet the needs of various laws and regulations and design targets regarding vehicle lighting.

However, it is difficult for the light emitting modules of the prior art to meet the above-mentioned size and functional requirements in all of the XYZ three reference directions of the vehicle, in particular to meet the design and installation requirements at steep parts of the vehicle. Therefore, further improvements in the light emitting modules of the prior art are needed.

SUMMERY OF THE UTILITY MODEL

Therefore, one of the objectives of the present invention is to provide a light emitting module, which at least partially solves the above-mentioned disadvantages.

According to a first aspect of the present invention, a light emitting module for a vehicle is provided, the light emitting module having a main light emitting direction and comprising: the radiator is used for installing and fixing other components of the light-emitting module and radiating heat generated in the light-emitting module, and the radiator is provided with an installation surface parallel to the main light-emitting direction; a Printed Circuit Board (PCBA) mounted on the mounting surface and parallel to the main light extraction direction; a light source disposed on the printed circuit board and for at least one light emitting function; a light reflecting member mounted on the printed circuit board, reflecting light emitted by the light source in the main light emitting direction, the light reflecting member having reflectors assigned to the light sources one-to-one; a lens holder mounted on the heat sink, extending in a direction perpendicular to the main light exit direction and parallel to a plane of the mounting surface; and a lens for projecting the light emitted from the light source and reflected by the light reflector in the main light-emitting direction, the lens being mounted on the lens support and extending in the same direction as the lens support, wherein the lens is configured such that its light-entering surface is divided into at least two regions having different curvatures and different focal lengths, and the regions are matched with the reflector one-to-one or one-to-many to realize the corresponding light-emitting function.

The utility model discloses based on such thinking, influence lens thickness and mainly have the parameter of two aspects, the focus of lens and the size of lens promptly. The larger the focal length, the thinner the lens. For lenses with the same focal length, the smaller the size, the thinner the lens. Therefore, in order to obtain an ultra-thin lens, the lens is required to have a long focal length and a small size. However, it is impossible to realize various desired light emission types using a long focal length lens in which the light incident surface is a single piece, and an excessively small lens is not sufficient. For this reason, by dividing the light incident surface of the lens into a plurality of regions having different curvatures and different focal lengths, it is possible to obtain a lens having a very thin total thickness and capable of being adapted to a very steep vehicle body model portion by flexibly setting the curvatures and focal lengths of the regions, to realize different light emission types and to satisfy different vehicle body models, thereby facilitating the design of the light emitting module and the vehicle body.

And, on the basis of prior art's light emitting module's compactness, furtherly, the utility model discloses a light emitting module has reduced the demand to different lenses and corresponding reflector special design manufacturing radiators through the light reflection spare that has integrateed all reflectors and the lens support that is used for installing lens, has reduced the size of radiator in the X direction of vehicle reference coordinate system and Z direction moreover. The dimensions of the light emitting module as a whole in these two directions are then reduced by the mutually adapted assembly of these components. This further improves the versatility of the individual components of the light-emitting module and the overall compactness.

It is to be understood that when the light emitting module according to the present invention is mounted on the vehicle in a working position at the head or tail of the vehicle, its main light emitting direction corresponds to the X direction of the vehicle reference coordinate system (corresponding to the X + direction when mounted at the head), and the plane of the mounting face of the heat sink substantially corresponds to the XY plane perpendicular to the Z direction of the vehicle reference coordinate system.

The light emitting module according to the present invention may also comprise the following optional features, either alone or in combination.

Preferably, the focal length of at least one of the regions of the light entry surface of the lens is greater than 50mm. More preferably, the focal length of at least one of the regions of the light incident surface of the lens is between 50mm and 100 mm. More preferably, the focal length of at least one of the regions of the light incident surface of the lens is between 100mm and 150 mm. To the technical field of the utility model, the focus that generally is greater than 50mm just can be called long focal length, the utility model discloses a light emitting module divides regional and setting parameter through the income plain noodles to lens, is equivalent to the sub-lens that uses a plurality of small areas, long focal length, can obtain the very thin lens of gross thickness after their combination.

Preferably, at least one of the regions of the light incident surface of the lens does not have a focal length. According to the present invention, the corresponding region of the lens light incident surface for a High Beam (HB) function, for example, may not have a focal length.

Preferably, for a region having a focus position in the region of the light incident surface of the lens, the focus position is set at a light source corresponding to the region, such as an upper surface of the light source light emitting surface. Compared to the prior art arrangement in which the focus position of the lens light incident surface region is disposed near the reflector, for example, the arrangement of the present invention is more advantageous for forming the cut-off lines (lines) type required for some light emitting functions, such as the Low Beam (LB) function or the front fog function.

Preferably, the curvature of the region of the light incident surface of the lens is different from the curvature of the corresponding light emitting surface of the lens. Therefore, through the hyperboloid design of the light incident surface and the corresponding light emergent surface of the lens, the focusing of sunlight entering the light emitting module through the lens can be effectively reduced, so that the aging effect of the sunlight on parts in the light emitting module is reduced, and the service lives of the parts are prolonged.

Preferably, the light incident surface of the lens is divided into three to nine regions, and the length of each of the regions with respect to the extending direction of the lens is between 10mm and 30 mm. According to specific requirements, the number and size of the regions divided by the light incident surface region of the lens are divided by considering the total design length of the lens relative to the extending direction of the lens and the light emitting function and the light emitting type which need to be arranged, and in addition, the regions tend to be divided into smaller regions at a steeper position so as to facilitate the design.

Preferably, the total thickness of the lens in the main light exit direction is between 2.5mm and 5mm. The total lens thickness is much smaller than that of a conventional light emitting module, thereby greatly reducing the size of the light emitting module in the X direction of the vehicle XYZ reference frame.

Preferably, the light emitting function is selected from a low beam function, a high beam function and a signal light function, the reflector of the light reflecting member and the region of the light incident surface of the lens cooperate to form a light emitting type required by the corresponding light emitting function, and the light emitting type is selected from a bright spot, a light spread and a predetermined pattern.

Preferably, the light source includes a first light source for a first light emitting function and a second light source for a second light emitting function, the light reflecting member includes a first reflector and a second reflector respectively assigned to the first light source and the second light source, and a part of the region of the light incident surface of the lens is used for the first light emitting function and a part of the region is used for the second light emitting function.

Preferably, said reflector for low beam function tends to cooperate with the less curved region of the light incident surface of said lens, while said reflector for high beam function tends to cooperate with the more curved region of the light incident surface of said lens. Preferably, the reflector for forming a light spread (light spread) tends to cooperate with a region of lesser curvature in the region of the light entry surface of the lens, and the mirror for forming a light spot (light hotspot) tends to cooperate with a region of greater curvature in the region of the light entry surface of the lens.

Because the high beam function emits parallel light, and the light beams for emitting bright spots are relatively concentrated, the requirements of the high beam function and the bright spots on the curvature of the lens are not high, and the high beam function and the bright spots can be arranged at positions with larger curvatures. Therefore, even in the vehicle body part with a steep design model, the area of the lens light incident surface is divided and reasonably arranged, and the area of the lens light incident surface for the high beam function or the bright spot function is arranged at the position with larger curvature as much as possible so as to arrange all needed light emitting functions and obtain ideal light emitting types.

Preferably, for the regular lens having a small difference in curvature, the light source and the corresponding reflector and lens entry surface region for the low beam function are disposed outside the vehicle body, and the light source and the corresponding reflector and lens entry surface region for the high beam function are disposed inside the vehicle body.

Preferably, the light source is an LED (light emitting diode) chip, wherein the light source for a high beam function or a low beam function is a plurality of single core LED chips or one to a plurality of multi-core LED chips, and the LED chip for forming a light-emitting spot required for the high beam function may be selected to have a light-emitting size of less than 1mm, such as 0.73mm, to improve illuminance required for lighting the light-emitting spot by using a small-sized chip. The LED chip for low beam function preferably uses a combination of single-chip LED chips and dual-chip LED chips to optimize heat dissipation of the light source chip and obtain a desired high luminous flux. Therefore, by reasonably selecting the types of the LED light sources, the balance between the heat dissipation capacity of the light sources and the required luminous flux and illuminance can be obtained.

Preferably, the light reflecting member comprises at least one reflector designed to have different reflecting surfaces connected to form a desired cut-off line type. According to the relevant legislation for vehicle lighting, some light emitting functions, such as low beam and front fog lamps, must have corresponding cut-off lines and their profile must comply with the regulations of the relevant legislation. By incorporating the function of the light barrier (shutter) for forming the cut-off line in the conventional light emitting module into the reflector, parts required in the light emitting module are reduced, the compactness of the light emitting module is further improved, and the production difficulty and cost thereof are reduced.

Preferably, the light reflecting member includes at least one reflector having a plurality of reflecting surfaces, which are a front reflecting surface for forming a bright spot or a light spread, a plurality of rear reflecting surfaces having different heights in a direction perpendicular to a plane of the mounting surface, and a bridge reflecting surface connecting the front reflecting surface and the plurality of rear reflecting surfaces for eliminating direct light of the light source, and the bridge reflecting surface for forming a cut-off line type required for a low beam lamp.

Preferably, the light reflector includes at least one reflector having three reflecting surfaces, which are a front reflecting surface for forming a bright spot or a light spread, a rear reflecting surface having the same height in a direction perpendicular to a plane of the mounting surface, and a bridge reflecting surface connecting the front reflecting surface and the rear reflecting surface, the rear reflecting surface for eliminating direct light of the light source, and the bridge reflecting surface for forming a cut-off line type required for a front fog lamp.

Preferably, the reflectors are staggered on the light reflecting member along the main light emitting direction, and more than one reflector is arranged in one or more rows of reflectors in the main light emitting direction, as are the arrangement of the light sources on the printed circuit board. By this arrangement of the light source and the respective reflector, the reflectors do not block light from each other and the size of the light emitting module in the X direction of the vehicle XYZ reference coordinate system is further reduced.

Preferably, the light reflecting member is integrally formed, the reflector is made of a reflection-plated mirror, and the shape of the inner surface of the reflector for emission is an ellipsoid, a paraboloid, a hyperboloid or a free-form surface. For example, the light reflector may be integrally molded from plastic, with the desired reflector profile being molded thereon, and then aluminized on the inner surface of the reflector to form a high reflectivity reflective surface.

Preferably, the printed circuit board, the light source, the light reflector, the lens support, the lens and the heat sink are fixed or mounted in a manner selected from among gluing, riveting, screwing, welding and fastening. For example, since the printed circuit board is thin, the light reflecting member can be fixed to the screw hole of the heat sink together with the printed circuit board by a screw.

Preferably, the lens holder itself may be a single piece or made integral with the light reflecting member. In the case where the lens holder is a single piece, it may be secured to the heat sink by positioning posts and holes. By making the lens holder and the light reflecting member as one body, the number of mounting parts and steps is reduced, the assembly process of the light emitting module is simplified, and the need for specially designing and manufacturing the heat sink is further reduced. The lens is then snap-fitted into the mounting slot of the lens holder, preferably by means of mounting lugs.

Preferably, the light source is at least two light sources, and the lens holder includes at least one partition wall extending in a direction perpendicular to the plane of the mounting surface, the partition wall serving to partition light from different light sources and direct light of the light source that scatters stray light reflected by the reflector or that is not reflected by the reflector. By providing the partition wall, the light sources can be arranged more compactly without fear that their lights interfere with each other. Preferably, the partition wall or the lens holder including the partition wall is made of a light absorbing material, for example, a black PC material is used. In particular, the lens holder portion corresponding to the light source for the high beam function may be free of a partition wall to reduce material usage and cost.

Preferably, the partition walls are given roughness with a stripe, grid or frosted effect to further scatter stray light reflected by the reflector or direct light of the light source not reflected by the reflector.

Preferably, the heat sink includes at least one blocking wall protruding from the mounting surface, passing through a corresponding hole in the printed circuit board, and extending in a direction perpendicular to a plane of the mounting surface, which is arranged in front of the light source with reference to the main light exit direction to block light emitted directly by the light source without being reflected by the reflector from reaching the lens. Preferably, the retaining wall is opaque. Of course, the walls may also be reflective, to reflect light, for example, toward other directions that do not reach the lens. Preferably, a retaining wall is provided only for the light source for the low beam function, and not for the light source for the high beam function, in order to save material and reduce costs.

Through the setting of above-mentioned partition wall and/or barricade, according to the utility model discloses a light-emitting module has obtained better effect to the stray light's of unwanted elimination and shielding to luminous effect has been optimized.

According to a second aspect of the present invention, a vehicle is provided, comprising at least one light emitting module as described above.

Preferably, the light emitting modules are two and symmetrically arranged at both ends of a front portion and/or a rear portion of the vehicle.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings. It is to be understood by those skilled in the art that these drawings are solely for purposes of illustration and are not intended as a definition of the limits of the invention. The same reference numbers in the drawings identify the same or similar elements. For purposes of illustration, the figures are not drawn to scale, and in the drawings:

fig. 1 shows a perspective view of a light emitting module according to an embodiment of the present invention;

fig. 2 shows a view of a light emitting module according to an embodiment of the invention from another angle, with parts unassembled;

fig. 3 illustrates a top view of a light emitting module according to an embodiment of the present invention with a lens holder removed;

fig. 4 shows a lens holder of a light emitting module according to an embodiment of the invention;

fig. 5 shows a lens of a light emitting module according to an embodiment of the invention;

fig. 6 illustrates an assembly view of a heat sink, a printed circuit board, a light reflector, a light source, a dam of a light emitting module according to an embodiment of the present invention;

fig. 7 shows a light reflector as a single piece of a light emitting module according to an embodiment of the invention, wherein the side of the inner surface of the reflector is shown;

fig. 8 schematically illustrates a view of a light reflector of a light emitting module according to another embodiment of the present invention integrated with a lens holder;

fig. 9 schematically illustrates a view of a heat sink, a printed circuit board, and a light source and a retaining wall disposed thereon of a light emitting module according to an embodiment of the present invention;

fig. 10 shows a simplified light path diagram of a lighting module according to an embodiment of the invention, in which two different light paths for the low beam function and the high beam function are shown.

Detailed Description

Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

Although terms such as "first," "second," etc. may be used herein to describe various elements, these terms are only used to distinguish one element from another element, and are not used to indicate any order in time, space, or logic between these elements. Thus, the first and second terms may be interchanged without departing from the teachings of the examples.

In the specification, when an element is referred to as being "on," "mounted to," or "connected to" another element, such an on, mounted, or connected element may or may not have one or more other elements interposed therebetween, unless explicitly stated otherwise.

Herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" specify the presence of stated features, quantities, operations, elements, components, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and/or combinations thereof. The term "plurality" means any number of two or more.

Unless otherwise defined, all terms including technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs after understanding the present invention. Further, in the description of the examples, when it is considered that detailed description of well-known related structures or functions will cause a vague explanation of the present invention, such detailed description will be omitted.

The X-, Y-, and Z-directions referred to herein are defined with reference to the XYZ reference frame commonly used in motor vehicles of the art. Other forward, rearward, upward, downward, inward, outward, leftward, rightward, and like directional and positional terms are defined with reference to the direction of normal forward travel of the vehicle and the conventional mounting of the light emitting module in the vehicle head, unless otherwise specified.

Fig. 1 shows an assembled perspective view of a lighting module 1 according to an embodiment of the invention. The light emitting module 1 mainly comprises a heat sink 10, a Printed Circuit Board (PCBA) mounted on a mounting face 7 (not shown) of the heat sink 10, a light reflector 20 comprising a plurality of reflectors mounted on the printed circuit board, a lens holder 8 mounted to the heat sink 10, a lens 9 mounted on the lens holder 8, and a light source arranged below the reflectors on the printed circuit board, not visible in fig. 1. The light emitting module 1 realizes at least one light emitting function and has a main light exit direction H, see fig. 2. The surface on the PCBA for mounting the light source and the light reflector 20 may be labeled 7', see fig. 10. The above-mentioned components of the light emitting module 1 of fig. 1 will be further explained below with reference to fig. 2 to 10.

According to the illustrated embodiment, the lens 9 is an irregular lens with a large variation of curvature, as shown, the lens 9 is relatively smooth on the left side of the figure with a small curvature, and quite steep on the right side of the figure with a large curvature. The light reflection member 20 having an overall shape of a plate and a plurality of reflectors on one side surface is a unitary piece. These reflectors are assigned one-to-one to the respective light sources arranged below the inner surface thereof to receive and reflect light emitted by the light sources in the main light exit direction H of the light emitting module 1. As a single piece, the light reflecting member 20 can be molded with the desired reflector profile and then the interior surface of the reflector can be metallized, such as aluminized, to form a high reflectivity reflective surface. The shape of the inner surface of the reflector may be an ellipsoid, a paraboloid, a hyperboloid or a free-form surface, which will not be described in detail herein. A printed circuit board, i.e., a PCBA, is a commonly used component in the art and will not be described in detail herein.

In the example shown in fig. 1, the light reflector 20 is secured to the PCBA together with the screw holes in the heat sink 10 by means of a number of screws, advantageously located at edge positions, through corresponding holes in the PCBA. To assist in this fixing, locating pins may also be provided at intermediate positions on the heat sink, which pins extend from corresponding locating holes on the PCBA and the light reflector 20. Although not shown, a thermally conductive medium, such as thermally conductive paste or thermally conductive sheet, may be applied between the heat sink 10 and the PCBA to optimize heat dissipation. The lens holder 8 is attached to the heat sink 10 at both ends thereof in the extending direction thereof substantially corresponding to the Y direction of the vehicle by fitting between positioning posts (positioning pins) and positioning holes. It should be understood that the illustrated mounting manners are only exemplary, and the mounting fixing or connecting manners of the components of the light emitting module according to the present invention can be any suitable manners known in the art, such as, but not limited to, gluing, riveting, screwing, welding, and snapping.

In order to reduce the assembly steps, the heat sink 10 is advantageously a one-piece component, in other words, a main body thereof including the mounting surface 7 is integrally formed with mounting portions (such as positioning posts, screw holes, etc.) on which other components for mounting and fixing the light emitting module 1 are mounted, heat radiating fins, retaining walls 6 described below, and the like. The inherent heat dissipation function of the heat sink 10 is not described in detail herein as conventional in the art.

Fig. 2 shows the light emitting module 1 viewed from another angle, from which a part of the light source, which may be a semiconductor light source, such as a Light Emitting Diode (LED) chip, under the reflector can be seen. The main light exit direction H of the light emitting module 1 is shown in the figure, it being understood that this direction corresponds to the X-direction of the XYZ reference coordinate system of the vehicle. As shown, the light exit surface 92 of the lens 9 visible from the outside of the light emitting module 1 is a single continuous surface. The lens 9 is shown not yet mounted to the lens holder 8, i.e. its mounting lugs 93 have not yet snapped into corresponding mounting slots 83 in the lens holder 8. And the positioning holes and positioning posts at the two ends of the lens support 8 in the figure are not matched and arranged on the corresponding positioning posts and positioning pins on the heat radiator 10.

Fig. 3 shows a top view of the light emitting module 1 according to an embodiment of the invention with the lens holder 8 removed to expose the total reflector. The light incident surface 91 of the lens 9 is visible from the angle shown. In the illustrated example, the light incident surface 91 of the lens 9 is divided into seven regions 9A to 9G from a position of larger curvature on the left side in the figure to a position of smaller curvature on the right side in the figure, as shown in fig. 5, which may cooperate with, for example, nine reflectors and corresponding nine light sources of the light reflecting member 20 shown in fig. 6, 7 and 9 to realize corresponding light emitting functions and light emitting types. In the illustrated example, the light emitting module 1 is implemented as a dual light module having two light emitting functions, wherein the first light emitting function is a low beam function and the second light emitting function is a high beam function, both of which require a widening of the lighting and a spot of lighting. In connection with fig. 10, the light source thus comprises a first light source 4 for a first light emitting function and a second light source 5 for a second light emitting function, and correspondingly the light reflector 20 comprises a first reflector 2 assigned to the first light source 4 and a second reflector 3 assigned to the second light source 5. Thus, in the region of the light incident surface 91 of the lens 9, a part of the regions such as 9D, 9E and 9F are used for the first light emitting function, and a part of the regions such as 9A, 9B, 9C and 9G are used for the second light emitting function. Here, although the first light emitting function implemented in the illustrated example is a low beam function and the second light emitting function is a high beam function, the present invention is not limited thereto, but the light emitting function may be a lighting function, a signaling function, or a combination thereof. Therefore, the above-described embodiment in which the low beam function is the first light emitting function and the high beam function is the second light emitting function is not limited, and other or more light emitting functions may be provided instead or in addition thereto.

Further, with continued reference to fig. 6, 7 and 9, in conjunction with fig. 10, to achieve the low beam function to illuminate the bright spots, the two reflectors 2A, 2B of the first reflector 2 are assigned one-to-one to the two light sources 4A, 4B of the first light source 4, preferably arranged at some distance from the edge of the PCBA; to achieve a low beam function spread of the illumination, the other two reflectors 2C, 2D of the first reflector 2 are assigned one-to-one to the other two light sources 4C, 4D of the first light source 4, preferably arranged close to the edge of the PCBA; to achieve high beam functional etendue, the reflectors 3A, 3B in the second reflector 3 are assigned one-to-one to two light sources 5A and 5B in the second light source 5 (light source 5A is completely blocked by heat sink 10 in fig. 6, not identified), preferably arranged at one end of the PCBA; to achieve the high beam function lighting the bright spot, the other three reflectors 3C, 3D and 3E in the second reflector 3 are assigned one-to-one to the other three light sources 5C, 5D and 5E in the second light source 5, preferably arranged at the other end of the PCBA.

Still further, with continued reference to fig. 3, 5 and 6,9A-9G, the seven lens entry surface regions have different curvatures and different focal lengths, wherein the region for low beam function lighting hot spots has a long focal length of greater than 50mm, even greater than 100mm, such as 70mm or 75mm, and the focal length of the region for low beam function lighting broadening is slightly less than the focal length of the region for low beam function lighting hot spots, such as 50mm. The regions for the high beam function are advantageously designed far-field, they have no focal length. According to this embodiment, three regions 9A, 9B and 9C of the left side of the drawing where the light incident surface 91 of the lens 9 has a large curvature in fig. 3 and 5 cooperate with the corresponding reflectors 3E, 3D and 3C on the right side of fig. 6 for making a bright spot in the high beam function, and one region 9G of the smallest curvature cooperates with the corresponding reflectors 3A and 3B for making a bright spread in the high beam function; of the three regions in the middle of the incident surface 91 of the lens 9, a relatively smooth region 9E cooperates with the respective two reflectors 2C and 2D for widening the beam in the low beam function, and two relatively steep regions 9D and 9F on either side of the region 9E cooperate with the respective reflectors 2B and 2A for brightening the spot in the low beam function. With such an arrangement, a very beautiful visual effect can be obtained when the light emitting module 1 emits light. It will be appreciated that at a region 9G of the input face 91 of the lens 9 where the lens input face (i.e. inner face) and the output face (i.e. outer face) are parallel faces, this region 9G can be considered to have no focal length and will therefore project incident light in the form of almost parallel light.

Still referring to fig. 6 and 9 in conjunction with fig. 10, for a light source for lighting a bright spot for a low beam function, the luminous flux may be insufficient with a single-core LED chip, and the heat dissipation is concentrated with a multi-core LED chip, so that it is preferable to light a bright spot in two regions using two single-core LED chips. According to a more preferred embodiment, in the light source for dipped headlight function, the 4A and 4B for lighting the bright spots can adopt a single-core LED chip, and the 4C and 4D for lighting the wide spots can adopt a double-core LED chip. And the LED chip for forming the light-emitting spot required for the high beam function is preferably selected as a small chip having a light-emitting size of less than 1mm, such as 0.73mm, to obtain a highly concentrated light beam and high illuminance. Further, as shown in fig. 3, 6, and 7, the reflectors 2 (2A to 2D), 3 (3A to 3E) for different light functions are staggered in the main light-emitting direction H (i.e., X direction) on the same surface of the light reflecting member 20, and it is intended to arrange a plurality of reflectors in the same row to reduce the number of rows of reflectors, which reduces the size required to arrange all the reflectors and their corresponding light sources 4 (4A to 4D), 5 (5A to 5E) in the X direction, which in turn reduces the total width of the light emitting module 1 in the X direction.

As can be seen from fig. 1, 2, 3 and 5, the total thickness and the dimension in the Z-direction of the lens 9 are very small. In fact, the utility model discloses the people is through implementing the utility model discloses, obtained the total length in Y side for 120mm, and the total height in Z side is less than 15 mm's such long and narrow shape light-emitting module, this light-emitting module adaptation is in the very precipitous molding in locomotive both ends, and satisfies required two kinds or more than two kinds of light-emitting function and the luminous type that corresponds, wherein the gross thickness of lens only is 2.5mm to 5mm.

Referring also to fig. 3, it can be seen that the single continuous light exit surface 92 of the lens 9 has a different curvature from the region of the light entrance surface 91 opposite thereto. Compared with a conventional lens with a whole plane light incoming surface, the double-curved-surface design reduces the focusing of sunlight entering the light emitting module 1 from the outside through the lens 9, so that the aging effect of sunlight suffered by parts inside the light emitting module 1 is reduced, and the service life of the parts is prolonged.

With continued reference to fig. 3 and 7, the light reflecting member 20 is shown from the outer surface side and the inner surface side, respectively. Where figure 7 shows the side of the inner surface of the light reflecting member 20 that will be mounted in contact with the PCBA, thus showing the metal-coated inner surface of the reflector that will be used to reflect light. It can be seen from fig. 3 and 7 that the reflectors 2A, 2B, 2C, and 2D for the low beam function each have a plurality of reflecting surfaces, which are a front reflecting surface, three rear reflecting surfaces having different heights in the Z direction, and a bridge reflecting surface connecting the front reflecting surface and the rear reflecting surface. The front reflecting surface is used for forming bright spots, the rear reflecting surface is used for eliminating direct light from the LED reaching the rear reflecting surface, and the bridging reflecting surface is used for forming a cut-off line required by the function of the dipped headlight so as to meet the requirements of relevant regulations. According to another embodiment, not shown, the respective reflector for the front fog lamp function has a front and a rear two reflecting surfaces and a bridging reflecting surface connecting the front and rear reflecting surfaces, wherein the rear reflecting surface has a uniform height in the Z direction, likewise for eliminating the effect of direct LED light, and the bridging reflecting surface is used to form a corresponding cut-off line for the front fog lamp function.

Fig. 4 shows a lens holder 8, and the lens holder 8 is used for mounting the lens 9 of which the light incident surface 91 is divided into seven regions in fig. 3. The lens holder 8 is seen to have six partition walls 81 extending in the Z-direction, which partition walls are also partly shown in fig. 2. These partition walls 81 serve to separate direct light from adjacent light sources from stray light reflected by the diffuse reflector or direct LED light not reflected by the reflector. By providing these partition walls 81, the light sources can be arranged more compactly without fear that their lights interfere with each other. As shown in fig. 4, the respective partition walls 81 of the light sources for the low beam function are advantageously made of a black light-absorbing material, for example a black Polycarbonate (PC) material. Preferably, the entire lens holder 8 including all the partition walls 81 is made of a black light absorbing material. As a variation of the illustrated embodiment, the lens holder portion corresponding to the light source for the high beam function may be free of a partition wall to reduce material usage and cost. Although not shown in the figures, the separating wall 81 advantageously has a roughness on the opposite side surfaces, which roughness is realized, for example, as a stripe, grid or frosting effect, to further scatter stray light reflected by the reflector or direct LED light not reflected by the reflector.

Also for the purpose of eliminating the shielding from stray light, the heat sink 10 may be provided with a retaining wall 6, see fig. 6 and 9, which protrudes from the mounting surface 7, through corresponding holes in the PCBA and the light reflector 20, and stops in front of the light source. In the assembled state of the light module 1, the retaining wall 6 is arranged in front of the associated light source in the main light exit direction H of the light module 1 to block light rays emitted directly by the light source without being reflected by the reflector from reaching the lens 9. The retaining wall 6 is advantageously opaque. Preferably, the retaining wall 6 is provided only for the light sources 4 for the low beam function, and not for the light sources 5 for the high beam function, in order to save material and reduce costs. Also, the retaining wall 6 advantageously can also serve as the locating pin mentioned above for assisting in securing the light reflector 20 to the heat sink 10 with the PCBA.

Fig. 8 shows a variant of the light emitting module according to the invention, in which the light entry face 91 of the lens 9 is divided into five regions, so that a plurality of reflectors correspond to one and the same region. In particular, in this variant, the lens holder 8 is formed integrally with the light reflector 20, in other words, the lens 9 can be considered to be mounted directly on the light reflector 20. This further simplifies the assembly of the light-emitting module 1.

It is to be understood that the division of the light incident surface 91 of the lens 9 and the design of the respective light sources and reflectors are not limited to the illustrated example. In general, the light incident surface 91 may be divided into three to nine regions, and each region has a length in the Y direction between 10mm to 30mm, for example, about 18mm in the embodiment shown in fig. 5. In practical operation, the number and size of the regions divided by the light incident surface region of the lens, the curvature and focal length of each region are determined by considering the total design length of the light emitting module in the Y direction, the total design height in the Z direction, the total thickness of the lens in the X direction, the light emitting function to be arranged, and the light emitting type. Furthermore, there is a tendency to divide the area smaller at a steeper position for the design. In a variation of the present invention, the curvature of the body part where the light emitting module 1 is installed is not changed much, and the lens 9 whose curvature is not changed much can be designed accordingly under this condition, the light source 4 for the low beam function and the corresponding reflector 2 and the lens light incident surface region are arranged outside the vehicle body, and the light source 5 for the high beam function and the corresponding reflector 3 and the lens light incident surface region are arranged inside the vehicle body.

Fig. 10 shows a simplified optical path diagram of a lighting module 1 according to an embodiment of the present invention, wherein the upper diagram shows the optical path of the low beam function and the lower diagram shows the optical path of the high beam function. As shown in the figure, in the illustrated embodiment, light emitted from the light source 4 located below the reflector 2 or the light source 5 located below the reflector 3 is reflected by the reflector, enters the lens 9 through the light incident surface 91, and finally exits through the light exiting surface 92. It can be seen in the upper drawing of fig. 10 that to the right in the drawing of the light source 4 there is a hole for the projection of the retaining wall 6. In particular, the focal positions of the areas (9D, 9E, 9F in the example of fig. 5) having a focal position in the light entrance surface area of the lens are arranged at their respective light sources, such as on the upper surface of the light exit surface of the light source, advantageously in an intermediate position of this upper surface, in order to form a cut-off line required for the light emitting function, such as the low beam function or the front fog function. In other words, the light sources are arranged near the one-time focus position of the respective lens light-in surface regions. This is also advantageous for further reducing the size of the light emitting module 1 in the X direction. According to the present invention, the lens light incident surface region (9A, 9B, 9C, and 9G in the example of fig. 5) for the high beam function has no focusing position.

Although not shown in the figures, the light emitting module 1 can be symmetrically installed at the two ends of the head of the vehicle, even if the curvature of the position is changed greatly, the light emitting module 1 can be adapted to meet various light emitting functions and light emitting types.

The drawings and the foregoing description depict various non-limiting embodiments of the invention. In particular, although the above description has been given by way of example of a light module mounted on a vehicle head, the light module according to the present invention may also be mounted on other locations of the vehicle, such as the vehicle tail. For the purpose of teaching inventive principles, certain conventional aspects, especially those that have been fully disclosed in the prior art, have been simplified or omitted. Those skilled in the art will appreciate that the features described above with reference to a number of embodiments can be combined in various ways to form further embodiments of the invention. Also, various modifications and alterations may be made to the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, the present invention is not limited to the above-described embodiments, but is only limited by the claims and their equivalents.

Claims (27)

1. A light emitting module for a vehicle, the light emitting module (1) having a main light exit direction (H), characterized in that the light emitting module (1) comprises:

-a heat sink (10) for mounting and fixing other components of the light emitting module (1) and dissipating heat generated in the light emitting module (1), the heat sink (10) having a mounting face (7) parallel to the main light exit direction (H);

-a Printed Circuit Board (PCBA) mounted on the mounting face (7) and parallel to the main light exit direction (H);

-a light source (4, 5) arranged on the printed circuit board and for at least one light emitting function;

-a light reflector (20) mounted on the printed circuit board, which reflects light emitted by the light sources in the main light exit direction (H), the light reflector (20) having reflectors (2, 3) assigned to the light sources one-to-one;

-a lens holder (8) mounted on the heat sink (10) extending in a direction perpendicular to the main light exit direction (H) and parallel to the plane of the mounting surface (7);

-a lens (9) for projecting light emitted by the light source and reflected by the light reflector (20) in the main light exit direction (H), the lens (9) being mounted on the lens holder (8) and extending in the same direction as the lens holder (8),

wherein the lens (9) is configured such that its light incident surface (91) is divided into at least two regions having different curvatures and different focal lengths, and the regions cooperate with the reflector one-to-one or one-to-many to realize the respective light emitting functions.

2. The lighting module according to claim 1, characterized in that at least one of the regions of the light entry face (91) of the lens (9) has a focal length greater than 50mm.

3. The lighting module according to claim 2, characterized in that at least one of the regions of the light entry face (91) of the lens (9) has a focal length between 50mm and 100 mm.

4. The lighting module according to claim 2, characterized in that the focal length of at least one of the regions of the light entry surface (91) of the lens (9) is between 100mm and 150 mm.

5. The lighting module of claim 1, wherein at least one of the regions of the light entry surface (91) of the lens (9) has no focal length.

6. The lighting module according to claim 1, characterized in that for a region having a focus position in the region of the light entry face (91) of the lens (9), the focus position is set at the light source corresponding to this region.

7. The lighting module of claim 1, wherein the curvature of the region of the light incident surface (91) of the lens (9) is different from the curvature of the corresponding light emitting surface (92) of the lens (9).

8. The lighting module according to claim 1, characterized in that the light entry face (91) of the lens (9) is divided into three to nine regions, each of which has a length of between 10mm and 30mm with respect to the extension direction of the lens (9).

9. Light module according to any one of claims 1 to 8, characterised in that the total thickness of the lens (9) in the main light exit direction (H) is between 2.5mm and 5mm.

10. The lighting module according to any one of claims 1 to 8, characterized in that the lighting function is selected from a low beam function, a high beam function and a signaling function, the reflector of the light reflector (20) cooperating with the region of the light entry face (91) of the lens (9) to form the type of lighting required for the respective lighting function, the type of lighting being selected from a bright spot, a light spread and a predetermined pattern.

11. Light module according to one of claims 1 to 8, characterized in that the light sources comprise a first light source (4) for a first light emission function and a second light source (5) for a second light emission function, the light reflector (20) comprising a first reflector (2) and a second reflector (3) assigned to the first light source (4) and the second light source (5), respectively, a part of the area of the light entry face (91) of the lens (9) being used for the first light emission function and a part of the area being used for the second light emission function.

12. The lighting module according to claim 10, characterized in that said reflector for low-beam functions tends to cooperate with the less curved region of the incident surface (91) of said lens (9), while said reflector for high-beam functions tends to cooperate with the more curved region of the incident surface (91) of said lens (9).

13. The lighting module according to claim 10, characterized in that the reflector for creating the light broadening tends to cooperate with the region of lesser curvature in the region of the input face (91) of the lens (9), while the reflector for creating the light hot spot tends to cooperate with the region of greater curvature in the region of the input face (91) of the lens (9).

14. The lighting module according to claim 10, characterized in that for said regular lens (9) with small curvature differences, the light sources for low beam function and the corresponding reflector and lens entry surface regions are arranged outside the vehicle body, and the light sources for high beam function and the corresponding reflector and lens entry surface regions are arranged inside the vehicle body.

15. The lighting module of claim 10, wherein the light source is an LED chip, wherein the light source for high beam function or low beam function is a plurality of single core LED chips or one to a plurality of multi-core LED chips, and the LED chip for forming the light brightness spot required for the high beam function can be selected to have a light emitting size of less than 1mm.

16. Light emitting module according to one of claims 1 to 8, characterized in that the light reflector (20) comprises at least one reflector designed with different reflecting surfaces connected to form a desired type of cut-off line.

17. The lighting module according to claim 16, wherein the light reflecting member (20) comprises at least one reflector having a plurality of reflecting surfaces, the plurality of reflecting surfaces being a front reflecting surface for forming a bright spot or a light spread, a plurality of rear reflecting surfaces having different heights in a direction perpendicular to the plane of the mounting surface (7), and a bridge reflecting surface connecting the front reflecting surface and the plurality of rear reflecting surfaces, the plurality of rear reflecting surfaces for eliminating direct light of the light source, the bridge reflecting surface for forming a cut-off line type required for a low beam lamp.

18. A light emitting module according to claim 16, characterized in that the light reflector (20) comprises at least one reflector having three reflecting surfaces, a front reflecting surface for forming a bright spot or a light spread, a rear reflecting surface having the same height in a direction perpendicular to the plane of the mounting surface (7), and a bridging reflecting surface connecting the front reflecting surface and the rear reflecting surface, the rear reflecting surface for eliminating direct light of the light source, the bridging reflecting surface for forming a cut-off line type required for a front fog lamp.

19. Light emitting module according to any one of claims 1 to 8, characterized in that the reflectors are staggered in the main light exit direction (H) on the light reflecting member (20) and that more than one reflector of the one or more rows of reflectors is arranged in the main light exit direction (H), as is the arrangement of the light sources on the printed circuit board.

20. Light emitting module according to any one of claims 1 to 8, characterized in that the light reflector (20) is integrally formed, the reflector is made of a reflectively coated mirror, and the inner surface of the reflector for reflection is shaped as an ellipsoid, a paraboloid, a hyperboloid or a free-form surface.

21. A light emitting module according to any one of claims 1 to 8, characterised in that the fixing or mounting between two of the Printed Circuit Board (PCBA), the light source (4, 5), the light reflector (20), the lens holder (8), the lens (9) and the heat sink (10) is selected from gluing, riveting, screwing, soldering and snap-fastening.

22. Light emitting module according to any one of claims 1 to 8, characterized in that the lens holder (8) is a monolithic element itself or is made in one piece with the light reflector (20).

23. Light emitting module according to any one of claims 1 to 8, characterized in that the light sources are at least two light sources (4, 5), the lens holder (8) comprising at least one separation wall (81) extending in a direction perpendicular to the plane of the mounting surface (7), the separation wall (81) being adapted to separate light from different light sources and to diffuse stray light reflected by the reflector or direct light of light sources not reflected by the reflector.

24. A light emitting module according to claim 23, characterized in that the separation wall (81) is given a roughness with a stripe, grid or frosting effect to further scatter stray light reflected by the reflector or direct light of the light source not reflected by the reflector.

25. A light module according to any one of claims 1-8, characterised in that the heat sink comprises at least one retaining wall (6) projecting from the mounting surface (7), through a corresponding hole in the printed circuit board and extending in a direction perpendicular to the plane of the mounting surface (7), which is arranged in front of the light source with reference to the main light exit direction (H), to block light emitted directly by the light source without being reflected by the reflector from reaching a lens (9).

26. A vehicle, characterized by comprising at least one light emitting module (1) according to any one of claims 1 to 25.

27. Vehicle according to claim 26, characterized in that the light modules (1) are two and are arranged symmetrically at both ends of the front and/or the rear of the vehicle.

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