Light emitting device for imaging virtual illuminated surface of light collector

Abstract

The invention relates to a lighting device (2), in particular for a motor vehicle, comprising: a light source (4) capable of emitting light; a light collector (6) having a reflective surface (6.2) configured to collect and reflect light emitted by the light source (4); an optical system (10) configured to project the rays from the reflective surface (6.2) into a light beam (12) along an optical axis of the device (8); and a mirror (7) configured to form a virtual image (4, 6.2) of the light source (4) and the reflective surface of the light collector (6), and wherein the optical system (10) is configured to form an image of said virtual image (4, 6.2).

Description

Technical Field

[0001] The present invention relates to the field of luminous lighting and signaling, and more particularly to the field of motor vehicles. Background Art

[0002] The published patent document FR 3 047 541 A1 discloses an illumination device, which includes two optical modules placed opposite to each other. Each of the two optical modules basically includes a light source and a light collector having a reflective surface. The two light sources are placed on two opposite faces of a common carrier. Each of the reflective surfaces is a surface of revolution in a half space delimited by the common carrier of the light source. The two reflective surfaces thus form two half shells opposite to each other. One of the two optical modules is configured to form a light illumination beam containing a flat cutoff line, which corresponds to the so-called low beam. To this end, the module includes a reflective surface having an edge called a "cutoff" edge, which is located at the focus of the reflective surface. The light rays that meet the surface in question behind the cut-off edge are reflected toward the upper part of the projection lens, while those that pass in front of the edge in question are not deflected and meet the lower part of the lens in question. This effect ensures a substantially flat cutoff line of the beam. The other of the two optical systems operates in substantially the same manner, with the only exception that the focal point of the reflective surface is located in front of the tangential edge. The light beam generated by the second optical system is combined with the light beam generated by the first system to generate a high beam, i.e., a light beam without a flat cutoff line. This configuration is advantageous in that it generates a high beam using a light beam containing a cutoff line.

[0003] A disadvantage of this type of lighting device is that a high degree of precision is required in positioning the deflector and the cut-off edge. As a result, the projection lens must be a thick lens due to its small focal length, which increases its weight and complicates its manufacture, especially with regard to the indentation. In addition, the light collector has a certain height and therefore a certain volume in the height direction. Summary of the invention

[0004] It is an object of the present invention to alleviate at least one of the aforementioned disadvantages of the prior art. More specifically, it is an object of the present invention to provide a lighting and / or signaling module or device which is compact and more economical to produce.

[0005] The subject of the present invention is a lighting device, in particular a lighting device for a motor vehicle, the device comprising: a light source capable of emitting light; a light collector having a reflective surface configured to collect and reflect the light emitted by the light source; an optical system configured to project the light from the reflective surface into a light beam along the optical axis of the lighting device; it is noteworthy that the lighting device comprises a mirror configured to form a virtual image of the light source and the reflective surface of the light collector, and the optical system is configured to image the virtual image.

[0006] The light source and the reflective surface form a light module. The light module is capable of forming a light beam. The light emitting device may include a plurality of light emitting modules. When a single light emitting module is present, the light emitting device may be considered equivalent to the light emitting module. The light emitting device forms an independent assembly, wherein each of the components of the assembly (e.g. one or more light sources, one or more light collectors, and an optical system) is rigidly fastened to the other components, in particular via a specific carrier (not described in detail), and is therefore optically positioned relative to the other components. One or more light emitting devices may therefore be placed in the headlamp housing so as to perform all the required illumination and signaling functions when appropriately combined.

[0007] According to a preferred embodiment of the invention, the reflective surface of the collector and the mirror are configured so that the light reflected by the rear part of the reflective surface is parallel to the optical axis, or the light has an inclination angle less than or equal to 25°, and preferably less than or equal to 10°, relative to the axis in a vertical plane relative to the axis.

[0008] According to an advantageous embodiment of the invention, the mirror is planar and parallel to the optical axis or inclined at an angle of less than 10° relative to said optical axis.

[0009] According to an advantageous embodiment of the invention, the light source is configured to emit light in a main direction which is perpendicular to the optical axis or inclined at an angle of less than 25° with respect to a direction perpendicular to the optical axis.

[0010] According to an advantageous embodiment of the invention, the reflective surface of the light collector has a parabolic or elliptical profile. Preferably, the reflective surface is a surface of revolution of said profile. The revolution is performed around an axis advantageously parallel to the optical axis. According to a variant, the reflective surface is a free-form surface or a swept surface or an asymmetric surface. The reflective surface may also comprise a plurality of segments.

[0011] According to an advantageous embodiment of the invention, the mirror forms an extension of the reflecting surface of the light collector towards the optical system.

[0012] According to an advantageous embodiment of the invention, the reflective surface of the light collector is configured to reflect the light rays emitted by the light source in a main direction diverging from the optical axis.

[0013] According to an advantageous embodiment of the invention, the mirror is formed on the light collector.

[0014] According to an advantageous embodiment of the invention, the light source is placed on a substrate, the mirror being aligned with said substrate.

[0015] According to an advantageous embodiment of the invention, the reflective surface of the light collector is configured to reflect the light rays emitted by the light source in a main direction converging with the optical axis, said optical axis passing through the base body.

[0016] According to an advantageous embodiment of the invention, the optical system has a focal point which is located in a region between the virtual light source and the virtual reflecting surface.

[0017] According to an advantageous embodiment of the invention, the focal point of the optical system is located on a virtual reflecting surface, behind the virtual light source along the optical axis.

[0018] According to an advantageous embodiment of the invention, the optical system comprises a lens corresponding to a segment of a converging lens centred on a virtual optical axis parallel to the optical axis and passing through the focal point of the optical system.

[0019] According to an advantageous embodiment of the invention, the reflective surface of the light collector has a rear edge, the light beam being a beam comprising a flat cut-off line, said cut-off line being an image of said rear edge.

[0020] According to an advantageous embodiment of the present invention, when the lighting device is in the functional position, the light source and the light collector are located above the optical axis, and the cut-off line of the light beam is a lower cut-off line.

[0021] According to an advantageous embodiment of the present invention, when the lighting device is in the functional position, the light source and the light collector are located below the optical axis, and the cut-off line of the light beam is an upper cut-off line.

[0022] According to a preferred embodiment of the present invention, the light source, the light collector, and the light beam are respectively a first light source, a first light collector, and a first light beam, the light emitting device comprises a second light source and a second light collector, the second light collector has a reflective surface, the reflective surface is configured to collect and reflect the light emitted by the second light source, and the optical system is configured to project the light rays from the reflective surface into a second light beam along the optical axis of the device and corresponding to the imaging of the reflective surface.

[0023] The first light concentrator and the first light source form a first light emitting module, and the second light concentrator and the second light source form a second light emitting module.

[0024] Advantageously, the lighting device is configured so that the second light beam is a real image of the reflective surface of the second light collector illuminated by the second light source. For this purpose, the light reflected by the reflective surface of the second light collector is transmitted to the optical system without being reflected by a mirror, in contrast to the light reflected by the reflective surface of the first light collector.

[0025] According to a favorable embodiment of the invention, the first light concentrator and the first light source are opposite to the second light concentrator and the second light source respectively with respect to the optical axis; or, the first light concentrator and the first light source on one side, and the second light concentrator and the second light source on the other side, are placed side by side.

[0026] The measures of the invention are advantageous in that they allow the creation of a compact, easily assembled, light module or device that contains few parts and that can perform a variety of different lighting and / or signaling functions. More specifically, imaging the illuminated reflective surface of the light collector allows the creation of a light beam with a concentration of light at a vertically off-center position in the light beam. Thus, the invention allows the image created to be flipped very easily and therefore allows one or more light beams to be modulated depending on the lighting and / or signaling function to be performed, in particular low-beam and high-beam lighting functions.

[0027] Other features and advantages of the invention will be better understood with the aid of the description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic representation of a light emitting device according to a first embodiment of the present invention.

[0029] Figure 2 yes Figure 1 A perspective view of an upper light collector of a light emitting device.

[0030] Figure 3 yes Figure 1 A view of the illuminated inner surface of a light collector of a light emitting device from the outside along the optical axis.

[0031] Figure 4 yes Figure 1 A graphical representation of the illumination imaging of the illumination beam generated by the light emitting device.

[0032] Figure 5 is a schematic representation of a light emitting device according to a variant of the first embodiment of the present invention.

[0033] Figure 6 yes Figure 5A graphical representation of the illumination imaging of the illumination beam generated by the light emitting device.

[0034] Figure 7 is a schematic representation of a light emitting device according to a second embodiment of the present invention.

[0035] Figure 8 is a schematic representation of a light emitting device according to a variant of the second embodiment of the present invention. DETAILED DESCRIPTION

[0036] In the following description, the concepts "above" and "below" the optical axis of the light emitting device should be understood relative to the light emitting device when the light emitting device is in a functional position, i.e. having an orientation corresponding to the orientation for which it is designed. Likewise, the concepts "in front of" and "behind" should be understood relative to the general direction of light along the optical axis when the device is in a functional position.

[0037] Figures 1 to 4 A first embodiment of a light emitting device according to the present invention is shown.

[0038] Figure 1 is a schematic representation of a lighting device and its operating principle. The lighting device 2 essentially comprises a light source 4, a light collector 6 capable of reflecting the light emitted by the light source so as to form a first light beam 12 along the optical axis 8 of the device, and a lens 10 for projecting said beam. Projection optics other than a projection lens are conceivable, such as in particular one or more mirrors.

[0039] The light source 4 is advantageously a semiconductor light source and in particular a light emitting diode. The light source 4 emits light in a half space delimited by a main plane of said light source, in the example shown, in a main direction perpendicular to said plane and to the optical axis 8. According to the invention, the main direction of emission will possibly be inclined by an angle less than or equal to 25° with respect to the direction perpendicular to the optical axis.

[0040] The light collector 6 comprises a carrier 6.1 in the shape of a shell or a cap, and a reflective surface 6.2 on the inner face of the carrier 6.1. The reflective surface 6.2 is advantageously an elliptical or parabolic or free-form profile. The light emitting device 2 further comprises a mirror 7, which is placed on an extension of the reflective surface 6.2 of the light collector 6. The mirror 7 comprises a carrier 7.1 and a reflective surface 7.2 of a plane formed on the carrier 7.1. The carrier 7.1 may be fused with or adjacent to the carrier 6.1 of the light collector. The reflective surface 6.2 of the light collector 6 is advantageously a surface of revolution around an axis parallel to the optical axis 8. Alternatively, the reflective surface may be a free-form surface or a swept surface or an asymmetric surface problem. The reflective surface may also comprise a plurality of sections. The expression "parabolic" is generally applied to a reflector whose surface has a single focus, i.e. a light converging region, i.e. an area such that the light emitted by a light source placed in this converging region is projected to a long distance after being reflected from the surface. Projecting to a long distance means that these rays do not converge towards an area located at least 10 times the size of the reflector. In other words, the reflected rays do not converge towards a certain convergence area, or if the reflected rays converge, this convergence area is also located at a distance greater than or equal to 10 times the size of the reflector. The parabolic surface may therefore include or exclude parabolic sections. A reflector with such a surface is usually used alone to generate a light beam. Alternatively, the reflector can be used as a projection surface associated with an elliptical reflector. In this case, the light source of the parabolic reflector is the convergence area of ​​the rays reflected by the elliptical reflector.

[0041] The mirror 7, and more specifically its planar reflective surface 7.2, is advantageously parallel to the optical axis 8. However, the reflective surface may be inclined relative to said axis, for example by an angle less than or equal to 10°. If the reflective surface is inclined, the mirror advantageously diverges from the optical axis in the main propagation direction of the light, i.e. from the light source 4 to the projection lens 10.

[0042] The light collector 6 in the shape of a shell or cap is advantageously made of a material having good heat resistance, for example glass or a synthetic polymer such as polycarbonate PC or polyetherimide PEI.

[0043] The light source 4 is placed at the focus of the reflective surface 6.2 of the light collector 6 so that its light is collected and reflected towards the mirror 7. The mirror 7 forms a virtual image of the reflective surface 6.2. 6.2 and the virtual image of light source 4 4 ,exist Figure 1 In FIG. 6 , these virtual images are shown as dashed lines. The optical system 10 projects a virtual image of the reflective surface 6.2 6.2 and the virtual image of light source 4 4At least some of these rays reflected by the mirror 7 have an inclination angle α with respect to said axis in the vertical plane that is less than or equal to 25° and preferably less than or equal to 10°, so as to be in the so-called Gaussian condition, allowing to obtain stigmatism, that is to say sharpness of the projected image. Advantageously, this is a matter of rays reflected by the rear part of the reflective surface 6.2 of the collector 6.

[0044] The projection lens 10 has a first entrance face 10.1 and an exit face 10.2. The lens 10 is referred to as thin, for example having a thickness along the optical axis of less than 7 mm, in particular because of its small lens height and long focal length. The lens 10 may have a focal point 10.3, which is advantageously located between the virtual light source and the virtual reflecting surface. The focal point 10.3 in question is advantageously located at the virtual image of the light source 4. 4 Virtual image with reflecting surface 6.2 6.2 The area between 6.3 In this case, the focus can be located at the virtual image of the reflecting surface 6.2 6.2 On the virtual image of the virtual light source 4 axially (ie along the optical axis) 4 It should be noted that it is also possible to have this focus in front of or behind the virtual image of the reflecting surface 6.2 of the collector 6 (provided it is nearby), and preferably less than 10 mm and more preferably less than 5 mm from the virtual image.

[0045] It will be noted that the lens 10 is advantageously a converging lens which is oriented with respect to a virtual optical axis located above the optical axis 8 and advantageously passing through the focal point 10.3. 8 (dotted lines) are symmetrical.

[0046] If the reflecting surface 6.2 of the light collector 6 is elliptical, it has a second focus which is located in front of the lens 10 and at a distance from the optical axis 8. It should be noted that it is also possible that this focus is located behind the lens and / or on the optical axis (provided it is near the lens) in order to reduce the width of the light beam on the entrance face of the lens.

[0047] The light source 4 and the light collector 6 are advantageously first light sources and first light collectors, the device then possibly comprising a second light source 14 and a second light collector 16 (drawn in dotted lines). In the present case, the first light source 4 and the first light collector 6 forming the first lighting module and the second light source 14 and the second light collector 16 forming the second lighting module are opposite with respect to the optical axis 8. More specifically, the first light source 4 and the second light source 14 are on opposite sides of a common substrate through which the optical axis 8 passes.

[0048] Figure 2 is from Figure 1 2. A rear perspective view of the rear part of the light collector 6 of the light emitting device 2. The shell or cap-shaped carrier 6.1 can be seen, and the fact that the reflecting surface 6.2 (not shown) has a rear edge 6.2.1 can be seen. Considering the fact that the carrier 6.1 and therefore the reflecting surface 6.2 form a preferably symmetrical shell of revolution delimited by a plane, the plane in question includes the rear edge 6.2.1. This rear edge 6.2.1 is located laterally on both sides of the revolution axis in this plane. When the reflecting surface 6.2 is illuminated by a light source, the entire surface of the reflecting surface is then illuminated, said surface being delimited in particular by the rear edge 6.2.1.

[0049] Figure 3 It is a representation of the light intensity on the reflective surface 6.2 of the light collector observed from the outside along the optical axis. This is a projection imaging problem of the virtual image of the reflective surface 6.2 of the light collector, which is imaged by the mirror 7 ( Figure 1 More specifically, this is the irradiance of a surface, i.e. the power per unit area of ​​electromagnetic radiation incident perpendicularly to the surface, expressed in W / m 2 The dark area covering most of the surface corresponds to a lower irradiance, while the brighter central area corresponds to a higher irradiance. It can be seen that the dark area is clearly delimited by the lower edge 6.2.1. In other words, the illuminated surface 6.2 naturally has a sharp lower edge that can form a cut-off line for the projection beam imaging this surface, and also forms a concentration of light in the central position located at the same height as the light source.

[0050] Figure 4 yes Figure 1 1 . The horizontal axis H and the vertical axis V intersect on the optical axis of the light emitting device. The curves are iso-illuminance curves, i.e. curves corresponding to areas with the same illuminance expressed in lux of the light beam 12. The curve in the center corresponds to a higher illuminance level than at the periphery.

[0051] Figure 4 It can be seen in FIG. 1 that the beam 12 comprises a flat lower cut-off line which is substantially flush with the horizontal axis. The cut-off line is not perfectly straight; it has a curvature corresponding to the resulting distortion in the imaging. In any case, the flat cut-off line is formed by the edge 6.2.1 ( Figure 3 ) is generated, which is the rear edge of the reflective surface 6.2 of the light collector 6 ( Figure 2 For this purpose, on the virtual reflecting surface, the focal point 10.3 ( Figure 1 ) is advantageously located at this edge ( Figure 3 ), i.e., the virtual image of the (first) light source 4 4It can also be seen that the resulting light beam contains a high concentration of light above the horizontal axis H.

[0052] This light beam 12 is therefore particularly suitable for performing a high-beam type lighting function complementary to a low-beam type lighting function.

[0053] Figure 5 The first embodiment of the present invention, namely Figure 1 Schematic representation of a variant of the lighting device 2 of the embodiment shown in FIG. Figure 1 The difference is that the components of the lighting device 2 ′ have been flipped 180° relative to the optical axis 8 , all other matters being likely to be identical.

[0054] Figure 6 The resulting beam 12' is shown in FIG. Figure 4 For comparison, it can be seen that the light imaging has been flipped, that is, the light imaging contains a flat upper cutoff line and a high concentration of light below and flush with the horizontal axis. This light beam is particularly suitable for performing a low-beam type lighting function.

[0055] Figure 7 is a schematic diagram of a light emitting device according to a second embodiment of the present invention. The reference numerals of the first embodiment have been used to designate corresponding or identical elements, however, these reference numerals are increased by 100. Reference is also made to the description of these elements in the context of the first embodiment. Specific reference numerals included between 100 and 200 are used to designate elements that are specific to this embodiment.

[0056] This second embodiment is Figure 1 The first embodiment differs substantially in that the mirrors configured to form the virtual image of the light source and the virtual image of the reflective surface are arranged differently, namely on or at least in the vicinity of the optical axis 108. In particular, the mirror 107 extends along the optical axis 108, which is advantageously aligned with the carrier of the light source 104. The reflective surface 106.2 of the light collector is configured to reflect the light rays emitted by the light source 104 towards the mirror. These reflected light rays are in contact with the virtual image of the reflective surface 106.2. 106.2 and a virtual image of the light source 104 104 Correspondingly, these virtual images have been drawn in dotted lines. The resulting beam 112 will then be Figure 4 The light beam 12 of the first embodiment shown in FIG. 1 essentially corresponds to that of FIG.

[0057] Similar to the first embodiment, the lens 110 may have a focal point 110.3 which is advantageously located between the virtual light source and the virtual reflecting surface. The focal point 110.3 in question is advantageously located at the virtual image of the reflecting surface 106.2. 106.2 Virtual image with light source 104104 The area between 106.3 In this case, the focus may be located at the virtual image of the reflective surface 106.2 106.2 On the axial direction (ie, along the optical axis) of the virtual image of the light source 104 104 It should be noted that it is also possible to make this virtual image with the focus at the reflective surface 106.2 of the collector 106 106.2 In front of or behind (provided it is nearby), and preferably less than 10mm, and more preferably less than 5mm from the virtual image.

[0058] Again similar to the first embodiment, the mirror 107, and more specifically its planar reflecting surface 107.2, is advantageously parallel to the optical axis 108. However, this reflecting surface may be inclined relative to said axis, for example by an angle less than or equal to 10°.

[0059] Again similar to the first embodiment, the light source 104 and the light collector 106 are advantageously a first light source and a first light collector, and the device then possibly comprises a second light source and a second light collector. In the present case, the first light source 104 and the first light collector 106 on one side and the second light source and the second light collector on the other side may be opposite relative to the optical axis 8. Alternatively, they may be placed side by side.

[0060] Figure 8 The second embodiment of the present invention, namely Figure 7 Schematic representation of a variant of the light emitting device 102 of the embodiment shown in FIG. Figure 7 The difference is that the components of the light emitting device 102' have been flipped 180° relative to the optical axis 108, all other matters may be identical.

[0061] The generated light beam 112' is Figure 5 The light emitting device generates Figure 6 This corresponds substantially to the beam 12' shown in FIG. Figure 7 The illumination imaging produced by the light beam 112 of the light emitting device is an inverted illumination imaging, and Figure 4 The illumination imaging of the light beam corresponds substantially to the illumination imaging problem, that is, the illumination imaging contains a flat upper cut-off line and a collection of light below and flush with the horizontal axis H. This light beam is particularly suitable for performing a low-beam type lighting function.

[0062] In general, the lighting devices that have just been described are advantageous in particular in that, by imaging the illuminated reflective surface, they allow light beams to be produced with a concentration of light at a vertically off-center position. These beams are particularly useful for performing low-beam and high-beam functions. Furthermore, by using mirrors, these lighting devices allow the light source and the light collector associated with the light source to be turned over and thus constrain the volume to be accommodated.

Claims

1. A lighting device for a motor vehicle (2; 102), the light emitting device comprises: - a light source (4; 104) capable of emitting light; a light collector (6; 106) having a reflective surface (6.2; 106.2) configured to collect and reflect the light rays emitted by the light source (4; 104); - an optical system (10; 110) configured to project the light rays coming from the reflecting surface (6.2; 106.2) into a light beam (12; 112) along the optical axis (8; 108) of the light emitting device; It is characterized in that The light emitting device (2; 102) comprises a mirror (7; 107) configured to form a virtual image ( 4 , 6.2 ; 104 , 106.2 ), and the optical system (10; 110) is configured to form the virtual image ( 4 , 6.2 ; 104，106.2 ) and The reflective surface (6.2; 106.2) of the light collector (6; 106) has a rear edge (6.2.1; 106.2.1), the light beam (12; 112) being a beam comprising a flat cut-off line, the cut-off line being an image of the rear edge.

2. The lighting device (2; 102) according to claim 1, characterized in that The reflecting surface (6.2; 106.2) of the collector (6; 106) and the mirror (7; 107) are configured so that the light reflected by the rear part of the reflecting surface (6.2; 106.2) is parallel to the optical axis (8, 108), or the light has an inclination angle less than or equal to 25° relative to the axis in a vertical plane relative to the axis.

3. The lighting device (2; 102) according to claim 2, wherein: The inclination angle is less than or equal to 10°.

4. The lighting device (2; 102) according to any one of claims 1 and 2, characterized in that The mirror (7; 107) is planar and parallel to the optical axis (8; 108) or inclined at an angle less than 10° relative to said optical axis.

5. The lighting device (2; 102) according to claim 1, characterized in that The light source (4; 104) is configured to emit light in a main direction which is perpendicular to the optical axis (8; 108) or inclined at an angle of less than 25° relative to a direction perpendicular to the optical axis.

6. The lighting device (2; 102) according to claim 1, characterized in that The reflecting surface (6.2; 106.2) of the light collector (6; 106) has a parabolic or elliptical profile.

7. The lighting device (2) according to claim 1, characterized in that: The mirror (7) forms an extension of the reflecting surface (6.2) of the light collector (6) towards the optical system (10).

8. The lighting device (2) according to claim 1, characterized in that: The reflective surface (6.2) of the light collector (6) is configured to reflect the light rays emitted by the light source (4) in a main direction diverging from the optical axis (8).

9. The lighting device (2) according to any one of claims 7 and 8, characterized in that The mirror (7) is formed on the light collector (6).

10. The light emitting device (102) according to claim 1, characterized in that: The light source (104) is placed on a substrate (118) and the mirror (107) is aligned with the substrate (118).

11. The lighting device (102) according to claim 10, characterized in that: The reflective surface (106.2) of the light collector (6) is configured to reflect the light rays emitted by the light source (104) in a main direction converging with the optical axis (108), which passes through the base body (118).

12. The lighting device (2; 102) according to any one of claims 1 to 11, characterized in that The optical system (10; 110) has a focus (10.3; 110.3) located at a virtual image ( 4 ; 104 ) and the virtual image ( 6.2 ; 106.2 ) in the area between .

13. The lighting device (2; 102) according to claim 1, characterized in that The focal point (10.3; 110.3) of the optical system (10; 110) is located at the virtual image ( 6.2 ; 106.2 ), a virtual image ( 4 ; 104 )rear.

14. The lighting device (2; 102) according to any one of claims 1 and 13, characterized in that The optical system comprises a lens (10; 110) corresponding to a virtual optical axis (10.3; 110.3) centered parallel to the optical axis (8; 108) and passing through a focal point (10.3; 110.3) of the optical system. 8 ; 108 ) on a segment of a converging lens.

15. The lighting device (2; 102) according to claim 14, characterized in that When the lighting device is in a functional position, the light source (4; 104) and the light collector (6; 106) are located above the optical axis (8; 108), and the cut-off line of the light beam (12; 112) is a lower cut-off line.

16. The lighting device (2'; 102') according to claim 14, characterized in that When the lighting device is in a functional position, the light source (4; 104) and the light collector (6; 106) are located below the optical axis (8; 108), and the cut-off line of the light beam (12'; 112') is an upper cut-off line.

17. The lighting device (2) according to claim 1, characterized in that: The light source (4; 104), the light collector (6; 106), and the light beam (12; 112) are respectively a first light source, a first light collector, and a first light beam. The light emitting device comprises a second light source (14) and a second light collector (16), the second light collector having a reflective surface, the reflective surface being configured to collect and reflect light emitted by the second light source (14), and the optical system (10; 110) being configured to project the light from the reflective surface into a second light beam along the optical axis of the device and corresponding to an imaging of the reflective surface.

18. The light emitting device according to claim 17, characterized in that: The first light concentrator (6; 106) and the first light source (4; 104) are opposite to the second light concentrator (16) and the second light source (14) respectively with respect to the optical axis (8; 108); or, the first light concentrator and the first light source on one side, and the second light concentrator and the second light source on the other side, are placed side by side.

Images