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1. WO2020114459 - LIGHTING MODULE, HEADLAMP FOR MOTOR VEHICLE, AND MOTOR VEHICLE

Document

Description

Title of Invention 0001   0002   0003   0004   0005   0006   0007   0008   0009   0010   0011   0012   0013   0014   0015   0016   0017   0018   0019   0020   0021   0022   0023   0024   0025   0026   0027   0028   0029   0030   0031   0032   0033   0034   0035   0036   0037   0038   0039   0040   0041   0042   0043   0044   0045   0046   0047   0048   0049   0050   0051   0052   0053   0054   0055   0056   0057   0058   0059   0060   0061   0062   0063   0064   0065   0066  

Claims

1   2   3   4   5   6   7   8   9   10   11  

Drawings

1   2   3  

Description

Title of Invention : Lighting module, headlamp for motor vehicle, and motor vehicle

Technical field

[0001]
The present invention relates to a lighting module, a headlamp comprising the lighting module and used for a motor vehicle, and a motor vehicle.
[0002]
Background art
[0003]
As LED technology rapidly develops, LEDs are being used as light sources for lighting apparatuses to an ever-increasing degree in existing motor vehicles. LEDs are generally used together with reflectors, in order to generate corresponding projection patterns.
[0004]
Content of the invention
[0005]
The present invention proposes a lighting module, a headlamp for a motor vehicle, and a motor vehicle, which are capable of generating a desired projection pattern.
[0006]
According to one aspect of the present invention, a lighting module is provided, which comprises:
[0007]
a light source having a light-emitting surface with an edge, and
[0008]
a reflector for reflecting light emitted by the light source to form a projection pattern having a first cut-off line and a second cut-off line at an angle to each other,
[0009]
wherein the reflector is fixed relative to the light source, and comprises a horizontal diffusion part forming the first cut-off line of the projection pattern and an inclined cut-off line forming part forming part forming the second cut-off line of the projection pattern,
[0010]
the horizontal diffusion part comprises at least one central horizontal diffusion part, and the inclined cut-off line forming part comprises at least one left-side inclined cut-off line forming part and at least one right-side inclined cut-off line forming part,
[0011]
wherein the at least one left-side inclined cut-off line forming part is located at the left side of the at least one central horizontal diffusion part, and
[0012]
wherein the at least one right-side inclined cut-off line forming part is located at the right side of the at least one central horizontal diffusion part.
[0013]
According to another embodiment of the present invention, the reflector has an arc shape overall, and has an inwardly depressed reflecting surface.
[0014]
According to another embodiment of the present invention, the horizontal diffusion part and the inclined cut-off line forming part both have a rearwardly sunken shape.
[0015]
According to another embodiment of the present invention, the horizontal diffusion part further comprises at least one left-side horizontal diffusion part located at the left side of the left-side inclined cut-off line forming part.
[0016]
According to another embodiment of the present invention, the at least one central horizontal diffusion part comprises a first central horizontal diffusion part and a second central horizontal diffusion part adjoining each other. The first central horizontal diffusion part and the second central horizontal diffusion part both extend from an upper end of the reflector to a lower end of the reflector.
[0017]
According to another embodiment of the present invention, the at least one right-side inclined cut-off line forming part comprises a first right-side inclined cut-off line forming part and a second right-side inclined cut-off line forming part which adjoin each other. The first right-side inclined cut-off line forming part adjoins, at the left side thereof, the at least one central horizontal diffusion part, and adjoins, at the right side thereof, the second right-side inclined cut-off line forming part.
[0018]
According to another embodiment of the present invention, a reflection image of the light-emitting surface reflected by the at least one left-side inclined cut-off line forming part, the first right-side inclined cut-off line forming part and the second right-side inclined cut-off line forming part forms the second cut-off line, wherein a left end of the reflection image reflected by the at least one left-side inclined cut-off line forming part, the first right-side inclined cut-off line forming part and the second right-side inclined cut-off line forming part is located in a horizontal direction at a middle position of a reflection image reflected by the second central horizontal diffusion part.
[0019]
According to another embodiment of the present invention, a reflection image of the light-emitting surface reflected by the first central horizontal diffusion part, the second central horizontal diffusion part and the at least one left-side horizontal diffusion part forms the first cut-off line, wherein the reflection image reflected by the second central horizontal diffusion part extends horizontally over the entire length of the projection pattern, and a left edge of a reflection image reflected by the first central horizontal diffusion part is located in the horizontal direction at the right side of a left edge of the reflection image reflected by the second central horizontal diffusion part. A right edge of the reflection image reflected by the first central horizontal diffusion part is located in the horizontal direction at the right side of the middle position of the reflection image reflected by the second central horizontal diffusion part, a left edge of a reflection image reflected by the at least one left-side horizontal diffusion part is located in the horizontal direction at the right side of the left edge of the reflection image reflected by the first central horizontal diffusion part, and a right edge of the reflection image reflected by the at least one left-side horizontal diffusion part is located in the horizontal direction approximately at the middle position of the reflection image reflected by the second central horizontal diffusion part.
[0020]
According to another embodiment of the present invention, the light source comprises multiple light-emitting diodes.
[0021]
According to another aspect of the present invention, a headlamp for a motor vehicle is provided, which comprises a housing, an adjustment apparatus and the lighting module described above, and the adjustment apparatus is used for adjusting the position of the lighting module relative to the housing.
[0022]
According to another aspect of the present invention, a motor vehicle is provided, which has the headlamp described above.
[0023]
In the lighting module and headlamp for a motor vehicle according to the present invention, the visual effect of the lamp structure is better. The projection pattern formed has a clear boundary. The addition of the left-side inclined cut-off line forming part at the left side of the central horizontal diffusion part increases the design margin, so that a low beam function can be realized on a small opening.

Brief description of the drawings

[0024]
These and/or other aspects and advantages of the present invention will become obvious and easy to understand through the following description of preferred embodiments which makes reference to the accompanying drawings, wherein:
[0025]
Fig. 1 is a structural schematic diagram showing a headlamp for a motor vehicle.
[0026]
Fig. 2 is a perspective view showing a reflector in a lighting module of the headlamp shown in fig. 1.
[0027]
Fig. 3 is a schematic diagram showing another perspective view of the reflector in the lighting module of the headlamp shown in fig. 1 and a projection pattern thereof.
[0028]
Reference list:
[0029]
1000 headlamp
[0030]
1100 housing
[0031]
1200 lighting module
[0032]
1210 light source
[0033]
1220 reflector
[0034]
1221 first central horizontal diffusion part
[0035]
1222 second central horizontal diffusion part
[0036]
1223 left-side horizontal diffusion part
[0037]
1224 left-side inclined cut-off line forming part
[0038]
1225 first right-side inclined cut-off line forming part
[0039]
1226 second right-side inclined cut-off line forming part
[0040]
1330 adjustment apparatus
[0041]
CR1 first central horizontal pattern
[0042]
CR2 second central horizontal pattern
[0043]
SL1 left-side horizontal pattern
[0044]
SL2 left-side inclined pattern
[0045]
SR1 first right-side inclined pattern
[0046]
SR2 second right-side inclined pattern
[0047]
CL1 first cut-off line
[0048]
CL2 second cut-off line
[0049]
Particular embodiments
[0050]
The technical solution of the present invention is explained in further detail below by means of embodiments in conjunction with the accompanying drawings. As used herein, identical drawing reference labels indicate functionally identical or similar components. The following explanation of embodiments of the present invention with reference to the accompanying drawings is intended to explain the overall invention concept of the present invention, and should not be interpreted as a limitation of the present invention.
[0051]
It must be understood that terms such as first, second and third used in the description do not arrange the relevant elements in order, but are intended to distinguish between the relevant elements, and therefore do not constitute a limitation of the present invention. Those skilled in the art will understand that unless clearly stated otherwise, directional phrases used herein, for example but not limited to horizontal, vertical, top, bottom, left, right, upper, lower, front, rear and derivatives thereof, relate to the orientation of elements shown in the figures, and are not a limitation of the claims. When describing the lighting module according to the present invention in conjunction with embodiments, the lighting module is always viewed in a direction facing the reflector, i.e. in a direction opposite to a direction of exit of light rays leaving the lighting module. Any relative orientation of components is based on the abovementioned viewing direction.
[0052]
Furthermore, in the detailed description below, to facilitate explanation, many specific details are expounded in order to provide a comprehensive understanding of the embodiments of the present disclosure. However, it is obvious that one or more embodiments could also be implemented without these specific details. In other cases, well-known structures and apparatuses are embodied as pictures in order to simplify the accompanying drawings.
[0053]
In the claims, no drawing reference label placed in brackets should be regarded as limiting the claims. The word “comprises” or “includes” does not exclude the existence of elements or steps other than those set out in the claims. In apparatus claims which enumerate methods, some of these methods may be implemented by the same item of hardware. The word “a” or “an” before an element does not exclude the existence of more than one of this element. In any apparatus claim which enumerates methods, some of these methods may be implemented by the same item of hardware. The simple fact that certain elements are expressed in multiple different dependent claims does not indicate that these elements cannot be used in combination.
[0054]
According to the concept of the present invention, a lighting module is provided, which comprises a light source having a light-emitting surface with an edge, and a reflector for reflecting light emitted by the light source to form a projection pattern having a first cut-off line and a second cut-off line at an angle to each other. The reflector is fixed relative to the light source, and comprises a horizontal diffusion part and an inclined cut-off line forming part. The horizontal diffusion part forms the first cut-off line of the projection pattern; the inclined cut-off line forming part forms the second cut-off line of the projection pattern. The horizontal diffusion part comprises at least one central horizontal diffusion part, and the inclined cut-off line forming part comprises at least one left-side inclined cut-off line forming part and at least one right-side inclined cut-off line forming part. The at least one left-side inclined cut-off line forming part is located at the left side of the at least one central horizontal diffusion part, and the at least one right-side inclined cut-off line forming part is located at the right side of the at least one central horizontal diffusion part.
[0055]
Fig. 1 is a structural schematic diagram showing a headlamp 1000 for a motor vehicle. The headlamp 1000 comprises a housing 1100, a lighting module 1200 and an adjustment apparatus 1330. The adjustment apparatus 1330 is used for adjusting the position of the lighting module 1200 relative to the housing 1100. Those skilled in the art will understand that although the lighting module 1200 according to the present invention has been described in conjunction with the headlamp 1000 for a motor vehicle, the present invention is not limited to this. On the contrary, the lighting module 1200 according to the present invention may be used for other lighting apparatuses which need to be provided with a cut-off line. The adjustment apparatus 1330 is well known in the art, so will not be described further in detail.
[0056]
Fig. 2 is a perspective view showing a reflector 1220 in the lighting module 1200 of the headlamp 1000 shown in fig. 1, wherein the perspective view is obtained by viewing from a position located at the top right of the reflector 1220. Fig. 3 is a schematic diagram showing another perspective view of the reflector 1220 in the lighting module 1200 of the headlamp 1000 shown in fig. 1 and a projection pattern thereof, wherein the perspective view is obtained by viewing from a position located at the bottom left of the reflector 1220.
[0057]
As shown in fig. 1, the lighting module 1200 comprises a light source 1210 having a light-emitting surface with an edge, and a reflector 1220 for reflecting light emitted by the light source 1210 to form a projection pattern having a first cut-off line CL1 and a second cut-off line CL2 at an angle to each other. The reflector 1220 is fixed relative to the light source 1210. The reflector 1220 comprises a horizontal diffusion part and an inclined cut-off line forming part. The horizontal diffusion part forms the first cut-off line CL1 of the projection pattern; the inclined cut-off line forming part forms the second cut-off line CL2 of the projection pattern. The horizontal diffusion part comprises at least one central horizontal diffusion part, and the inclined cut-off line forming part comprises at least one left-side inclined cut-off line forming part 1224 and at least one right-side inclined cut-off line forming part. The at least one left-side inclined cut-off line forming part 1224 is located at the left side of the at least one central horizontal diffusion part, and the at least one right-side inclined cut-off line forming part is located at the right side of the at least one central horizontal diffusion part. Through the provision of the at least one left-side inclined cut-off line forming part 1224 at the left side of the central horizontal diffusion part, the lighting module 1200 according to the present invention can make full use of limited space to make an inclined cut-off line clearer, at the same time increasing brightness at the centre of the projection pattern. In the embodiment shown in figs. 1 -3, the first cut-off line CL1 is a horizontal cut-off line, and the second cut-off line CL2 is an inclined cut-off line. In one embodiment, the second cut-off line CL2 is inclined upwards by 15° relative to the first cut-off line CL1. However, those skilled in the art will understand that the angle at which the second cut-off line CL2 is inclined relative to the first cut-off line CL1 is not limited to this, but can be adjusted according to regulatory requirements or actual needs.
[0058]
As shown in figs. 1 -3, in the embodiment shown in the figures, the reflector 1220 has an arc shape overall, and has an inwardly depressed reflecting surface. In particular, the horizontal diffusion part and the inclined cut-off line forming part both have a rearwardly sunken shape. The reflector 1220 can reflect light rays emitted by the light source 1210 along a longitudinal axis of the vehicle (direction X shown in fig. 1) to form the required projection pattern.
[0059]
As shown in figs. 2 and 3, in the embodiment shown in the figures, the horizontal diffusion part further comprises at least one left-side horizontal diffusion part 1223 located at the left side of the left-side inclined cut-off line forming part 1224. The projection on a plane perpendicular to axis X of a connection part of the at least one left-side horizontal diffusion part 1223 and the at least one left-side inclined cut-off line forming part 1224 is substantially a straight line. Due to the fact that the at least one left-side horizontal diffusion part 1223 is retained at the left side of the at least one central horizontal diffusion part, the brightness of a horizontal pattern formed by the reflector 1220 can be ensured.
[0060]
As shown in figs. 2 and 3, in the embodiment shown in the figures, the at least one central horizontal diffusion part comprises a first central horizontal diffusion part 1221 and a second central horizontal diffusion part 1222 adjoining each other. The first central horizontal diffusion part 1221 and the second central horizontal diffusion part 1222 both extend from an upper end of the reflector 1220 to a lower end of the reflector 1220, and the first central horizontal diffusion part 1221 is located at the left side of the second central horizontal diffusion part 1222. By providing two central horizontal diffusion parts, it is possible to ensure that different parts of the projection pattern have the desired brightness while achieving a specified projection pattern width. Those skilled in the art will understand that although two central horizontal diffusion parts are provided in the embodiment shown in the figures, the quantity of central horizontal diffusion parts is not limited to this. Those skilled in the art could provide any quantity of central horizontal diffusion parts as required.
[0061]
As shown in figs. 2 and 3, in the embodiment shown in the figures, the at least one right-side inclined cut-off line forming part comprises a first right-side inclined cut-off line forming part 1225 and a second right-side inclined cut-off line forming part 1226 which adjoin each other. The first right-side inclined cut-off line forming part 1225 adjoins, at the left side thereof, the at least one central horizontal diffusion part, and adjoins, at the right side thereof, the second right-side inclined cut-off line forming part 1226. By providing two right-side inclined cut-off line forming parts, it is ensured that different parts of an inclined cut-off line of the projection pattern have the desired brightness. The projection on a plane perpendicular to axis X of a connection part of the first right-side inclined cut-off line forming part 1225 and the second right-side inclined cut-off line forming part 1226 is substantially a straight line. Those skilled in the art will understand that although two right-side inclined cut-off line forming parts are provided in the embodiment shown in the figures, the quantity of right-side inclined cut-off line forming parts is not limited to this. Those skilled in the art could provide any quantity of right-side inclined cut-off line forming parts as required.
[0062]
As shown in fig. 3, in the embodiment shown in the figures, a reflection image, reflected by the at least one left-side inclined cut-off line forming part 1224, the first right-side inclined cut-off line forming part 1225 and the second right-side inclined cut-off line forming part 1226, of the light-emitting surface forms the second cut-off line CL2. A left end of the reflection image reflected by the at least one left-side inclined cut-off line forming part 1224, the first right-side inclined cut-off line forming part 1225 and the second right-side inclined cut-off line forming part 1226 is located in a horizontal direction at a middle position of a reflection image reflected by the second central horizontal diffusion part 1222. A reflection image, reflected by the at least one left-side inclined cut-off line forming part 1224, of the light-emitting surface is called a left-side inclined pattern SL2, as shown in fig. 3. A reflection image, reflected by the first right-side inclined cut-off line forming part 1225, of the light-emitting surface is called a first right-side inclined pattern SR1, as shown in fig. 3. A reflection image, reflected by the second right-side inclined cut-off line forming part 1226, of the light-emitting surface is called a second right-side inclined pattern SR2, as shown in fig. 3.
[0063]
As shown in fig. 3, in the embodiment shown in the figures, a reflection image, reflected by the first central horizontal diffusion part 1221, the second central horizontal diffusion part 1222 and the at least one left-side horizontal diffusion part 1223, of the light-emitting surface forms the first cut-off line CL1. The reflection image reflected by the second central horizontal diffusion part 1222 is called a second central horizontal pattern CR2, as shown in fig. 3. The second central horizontal pattern CR2 extends horizontally over the entire length of the projection pattern. A reflection image reflected by the first central horizontal diffusion part 1221 is called a first central horizontal pattern CR1, as shown in fig. 3. A left edge of the first central horizontal pattern CR1 is located in the horizontal direction at the right side of a left edge of the second central horizontal pattern CR2. A right edge of the first central horizontal pattern CR1 is located in the horizontal direction at the right side of the middle position of the second central horizontal pattern CR2. A reflection image reflected by the at least one left-side horizontal diffusion part 1223 is called a left-side horizontal pattern SL1, as shown in fig. 3. A left edge of the left-side horizontal pattern SL1 is located in the horizontal direction at the right side of the left edge of the first central horizontal pattern CR1, and a right edge of the left-side horizontal pattern SL1 is located in the horizontal direction approximately at the middle position of the second central horizontal pattern CR2.
[0064]
In the embodiment shown in the figures, the light source 1210 may be multiple light-emitting diodes, e.g. white light-emitting diodes.
[0065]
Those skilled in the art will understand that although only one left-side inclined cut-off line forming part is shown in the embodiment shown in the figures, the quantity of left-side inclined cut-off line forming parts is not limited to this. Those skilled in the art could provide any quantity of left-side inclined cut-off line forming parts as required. Similarly, those skilled in the art will understand that although only one left-side horizontal diffusion part is shown in the embodiment shown in the figures, the quantity of left-side horizontal diffusion parts is not limited to this. Those skilled in the art could provide any quantity of left-side horizontal diffusion parts as required.
[0066]
Although the present invention has been described in detail according to embodiments currently regarded as being the most practical and preferred, for the purpose of explanation by example, it should be understood that these details are only intended for that purpose, and the present invention is not limited to the embodiments disclosed; on the contrary, the present invention is intended to encompass all variants and equivalent apparatuses which fall within the spirit and scope of the attached claims. For example, it should be understood that the present invention takes account of the fact that, within a possible range, one or more features of any embodiment may be combined with one or more features of any other embodiment.

Claims

[Claim 1]
Lighting module (1200) comprising a light source (1210) having a light-emitting surface with an edge, and a reflector (1220) for reflecting light emitted by the light source (1210) to form a projection pattern having a first cut-off line (CL1) and a second cut-off line (CL2) at an angle to each other, wherein the reflector (1220) is fixed relative to the light source (1210) , and comprises a horizontal diffusion part forming the first cut-off line (CL1) of the projection pattern and an inclined cut-off line forming part forming the second cut-off line (CL2) of the projection pattern, characterized in that the horizontal diffusion part comprises at least one central horizontal diffusion part, and the inclined cut-off line forming part comprises at least one left-side inclined cut-off line forming part (1224) and at least one right-side inclined cut-off line forming part, wherein the at least one left-side inclined cut-off line forming part (1224) is located at the left side of the at least one central horizontal diffusion part, and wherein the at least one right-side inclined cut-off line forming part is located at the right side of the at least one central horizontal diffusion part.
[Claim 2]
Lighting module (1200) according to Claim 1, characterized in that the reflector (1220) has an arc shape overall, and has an inwardly depressed reflecting surface.
[Claim 3]
Lighting module (1200) according to Claim 2, characterized in that the horizontal diffusion part and the inclined cut-off line forming part both have a rearwardly sunken shape.
[Claim 4]
Lighting module (1200) according to Claim 2, characterized in that the horizontal diffusion part further comprises at least one left-side horizontal diffusion part (1223) located at the left side of the left-side inclined cut-off line forming part (1224) .
[Claim 5]
Lighting module (1200) according to Claim 4, characterized in that the at least one central horizontal diffusion part comprises a first central horizontal diffusion part (1221) and a second central horizontal diffusion part (1222) adjoining each other, wherein the first central horizontal diffusion part (1221) and the second central horizontal diffusion part (1222) both extend from an upper end of the reflector (1220) to a lower end of the reflector (1220) .
[Claim 6]
Lighting module (1200) according to Claim 5, characterized in that the at least one right-side inclined cut-off line forming part comprises a first right-side inclined cut-off line forming part (1225) and a second right-side inclined cut-off line forming part (1226) which adjoin each other, wherein the first right-side inclined cut-off line forming part (1225) adjoins, at the left side thereof, the at least one central horizontal diffusion part, and adjoins, at the right side thereof, the second right-side inclined cut-off line forming part (1226) .
[Claim 7]
Lighting module (1200) according to Claim 6, characterized in that a reflection image of the light-emitting surface reflected by the at least one left-side inclined cut-off line forming part (1224) , the first right-side inclined cut-off line forming part (1225) and the second right-side inclined cut-off line forming part (1226) forms the second cut-off line (CL2) , wherein a left end of the reflection image reflected by the at least one left-side inclined cut-off line forming part (1224) , the first right-side inclined cut-off line forming part (1225) and the second right-side inclined cut-off line forming part (1226) is located in a horizontal direction at a middle position of a reflection image reflected by the second central horizontal diffusion part (1222) .
[Claim 8]
Lighting module (1200) according to Claim 7, characterized in that a reflection image of the light-emitting surface reflected by the first central horizontal diffusion part (1221) , the second central horizontal diffusion part (1222) and the at least one left-side horizontal diffusion part (1223) forms the first cut-off line (CL1) , wherein the reflection image reflected by the second central horizontal diffusion part (1222) extends horizontally over the entire length of the projection pattern, wherein a left edge of a reflection image reflected by the first central horizontal diffusion part (1221) is located in the horizontal direction at the right side of a left edge of the reflection image reflected by the second central horizontal diffusion part (1222) , and a right edge of the reflection image reflected by the first central horizontal diffusion part (1221) is located in the horizontal direction at the right side of the middle position of the reflection image reflected by the second central horizontal diffusion part (1222) , and wherein a left edge of a reflection image reflected by the at least one left-side horizontal diffusion part (1223) is located in the horizontal direction at the right side of the left edge of the reflection image reflected by the first central horizontal diffusion part (1221) , and a right edge of the reflection image reflected by the at least one left-side horizontal diffusion part (1223) is located in the horizontal direction approximately at the middle position of the reflection image reflected by the second central horizontal diffusion part (1222) .
[Claim 9]
Lighting module (1200) according to any one of Claims 1 -8, characterized in that the light source (1210) comprises multiple light-emitting diodes.
[Claim 10]
Headlamp (1000) for a motor vehicle comprising a housing (1100) , an adjustment apparatus (1330) and the lighting module (1200) according to any one of Claims 1 -9, wherein the adjustment apparatus (1330) is used for adjusting the position of the lighting module (1200) relative to the housing (1100) .
[Claim 11]
Motor vehicle having the headlamp (1000) according to Claim 10.

Drawings

[ Fig. 1]  
[ Fig. 2]  
[ Fig. 3]