Combined light emitting module for imaging illuminated surface of light collector

Abstract

A motor vehicle lighting module (2) comprising: a first light source (4) and a first reflective surface (6) configured to collect light rays emitted by said first light source and to reflect these light rays into a first light beam (16); a second light source (18) and a second reflective surface (20) configured to collect light rays emitted by the second light source and to reflect these light rays into a second light beam (22); and an optical system (14) configured to project the first and second light beams (16, 22); the first and second light sources (4, 18) emit light in the same direction, the first and second reflective surfaces (6, 20) are offset along an optical axis (12), and the optical system (14) is configured to form an image of the second reflective surface (20).

Description

Technical Field

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

[0002] How to use one or more lighting modules including deflectors to generate an illumination beam containing a cutoff line is generally known. Such a lighting module conventionally includes a first light collector having a first reflective revolving surface having an elliptical profile having a skull shape in a half-space defined by a horizontal plane. A substantially point-shaped light source (such as a light-emitting diode) is located at the first focus of the reflective surface and irradiates light into the half-space in the direction of the surface. The light is therefore reflected in a converging manner toward the second focus of the first reflective surface. A roughly planar auxiliary reflective surface with a cutoff line-forming edge flush with the second focus ensures that there is no upward reflection of any light that passes exactly through the second focus, which is then refracted by a thick lens toward the bottom of the illumination beam. This auxiliary reflective surface is usually called a "deflector" because it "deflects" any light that would otherwise form the upper part of the illumination beam toward the top of the projection lens. This first beam contains a horizontal cutoff line that can be bent and corresponds to the type of illumination beam known as a low-beam beam. It is also known to provide a second light source and a second light collector forming a second reflective surface, these elements being opposite the first light source, the first light collector and the first reflective surface and being configured to form a second light beam of the type known as a high beam. The second light source may comprise a plurality of individually activatable illuminated areas, and the second reflective surface may be segmented into a plurality of segments, thereby forming a segmented light beam.

[0003] This light module has the disadvantage of requiring the deflector and the cutoff line forming edge to be positioned with high precision. Therefore, the projection lens must be a thick lens due to its small focal length, which increases its weight and complicates its manufacturing (especially in terms of indentation). In addition, the light collector has a certain height and therefore has a certain volume in the height direction. Summary of the invention

[0004] The object of the present invention is 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 module capable of forming a light beam, possibly a light beam containing a cut-off, which is compact and more economical to produce.

[0005] The subject of the present invention is a lighting module, in particular a lighting module for a motor vehicle, the module comprising: a first reflecting surface and a first light source capable of emitting light, the first reflecting surface being configured to collect the light emitted by the first light source and reflect the light along the optical axis of the module into a first light beam; a second light source and a second reflecting surface, the second reflecting surface being configured to collect the light emitted by the second light source and reflect the light along the optical axis into a second light beam; an optical system configured to project the first light beam and the second light beam; it is noteworthy that the first light source and the second light source emit light in the same direction, the first reflecting surface and the second reflecting surface are offset along the optical axis, and the optical system is configured to form an image of the second reflecting surface.

[0006] By forming an image of the second reflecting surface, it is meant that the optical system has a focus located on or near the second reflecting surface and has a sufficient depth of field. The latter is advantageously at least 30% of the length of the second reflecting surface along the optical axis and more advantageously the entire length. A projection lens of large focal length and small height allows a large depth of field to be obtained. Advantageously, the light rays incident on the optical system are parallel to the optical axis or inclined less than 25° and preferably less than 15° relative to said optical axis, so that the paraxial approximation applies.

[0007] The first light beam advantageously forms a low-beam automotive lighting beam or a part of such a beam. The first light beam may, for example, be a beam comprising a horizontal flat cut-off line or a curved cut-off line. Alternatively, the first light beam allows

[0008] The second light beam advantageously combines with the first light beam to form a high-beam vehicle lighting beam, and for example a segmented high-beam vehicle lighting beam. The second light beam can also be a supplementary beam that participates in forming a low-beam beam or even an advantageously segmented high-beam beam.

[0009] The optical system may comprise a projection lens or one or more mirrors.

[0010] According to an advantageous embodiment of the invention, the first reflecting surface and the second reflecting surface are formed on the same light collector.

[0011] According to a preferred embodiment of the invention, the second reflecting surface is segmented transversely to the optical axis to form adjacent reflecting surface strips, and the second light source comprises a plurality of individually activatable luminous areas extending laterally and associated with said adjacent reflecting surface strips.

[0012] According to an advantageous embodiment of the invention, the second reflecting surface comprises a rear edge forming a horizontal cut-off in the second beam.

[0013] According to an advantageous embodiment of the invention, the optical system has a focal point which is located on the second reflecting surface or at a distance of less than 10 mm from said second reflecting surface.

[0014] According to an advantageous embodiment of the invention, the focal point of the optical system is located on the rear edge of the second reflecting surface or at a distance less than 10 mm from said rear edge.

[0015] According to an advantageous embodiment of the invention, each of the first reflecting surface and the second reflecting surface has an elliptical or parabolic profile.

[0016] According to an advantageous embodiment of the invention, the lighting module further comprises a focusing device, which is optically placed between the second light source and the second reflecting surface and is configured to focus the light emitted by the second light source towards the rear edge of the second reflecting surface. When the second light source comprises a series of individually activatable light emitting areas, the focusing device is advantageously a lens or a series of lenses.

[0017] According to an advantageous embodiment of the invention, the first reflecting surface has an elliptical profile with a second focus and a first focus corresponding to the first light source, the lighting module further comprising an auxiliary reflecting surface having a front edge at the second focus, the front edge forming an edge forming a horizontal cut-off line with or without a bend in the first beam. The auxiliary reflecting surface is advantageously planar. This is a matter of the deflector. It is advantageously parallel or aligned with the optical axis.

[0018] According to an advantageous embodiment of the invention, the rear edge of the second reflecting surface is adjacent to or coincides with the front edge of the auxiliary reflecting surface, which forms a horizontal cut-off line with or without a bend in the first beam.

[0019] According to a preferred embodiment of the present invention, the light emitting module further comprises a third light source capable of emitting light and a third reflecting surface adjacent to and in front of the second reflecting surface, the third surface being configured to collect the light emitted by the third light source and reflect the light into a third light beam along the optical axis.

[0020] The third light beam advantageously supplements the second light beam, so that in combination with the first light beam it forms a high-beam vehicle lighting beam, and for example a segmented high-beam vehicle lighting beam.

[0021] According to an advantageous embodiment of the invention, the third reflecting surface comprises a rear edge forming a horizontal cut-off in the third beam.

[0022] According to a preferred embodiment of the invention, the third reflecting surface is segmented transversely to the optical axis to form adjacent reflecting surface strips, and the third light source comprises a plurality of individually activatable luminous areas extending laterally and associated with said adjacent reflecting surface strips.

[0023] According to an advantageous embodiment of the invention, the first reflecting surface is adjacent to and behind the second reflecting surface, and the optical system is configured to also form an image of the first reflecting surface.

[0024] Advantageously, the first light beam and the second light beam complement each other to form a high-beam vehicle lighting beam in combination with a light beam including a cut-off line formed by another module, and for example a segmented high-beam vehicle lighting beam.

[0025] According to a preferred embodiment of the invention, the first reflecting surface is segmented transversely to the optical axis to form adjacent reflecting surface strips, and the first light source comprises a plurality of individually activatable luminous areas extending laterally and associated with said adjacent reflecting surface strips.

[0026] The measures of the invention have the advantage that they allow the generation of a plurality of beams containing horizontal cut-offs with a single module which remains compact (in particular in height) and simple to produce. Imaging the illuminated reflective surface with a sufficient depth of field allows obtaining a sharply projected luminous image and therefore allows the generation of equally sharp cut-offs with the aid of the edges of the surface in question. Furthermore, when the paraxial approximation applies (i.e. when the light rays are only slightly inclined with respect to the optical axis and are not very far from said axis), the lens forming the projection system can be a thin lens, for example with a thickness of less than 6 mm, which allows the lens to be produced in a single plastic injection-molding operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] [ Figure 1 ] is a longitudinal cross-sectional schematic diagram of a light emitting module according to a first embodiment of the present invention;

[0028] [ Figure 2 ]yes Figure 1 A perspective view of a second reflective surface of the light emitting module and a second light source;

[0029] [ Figure 3 ] is Figure 1 A graphical representation of a luminous image of a light beam generated by a luminous module;

[0030] [ Figure 4 ] is a longitudinal cross-sectional schematic diagram of a light emitting module according to a second embodiment of the present invention;

[0031] [ Figure 5 ]yes Figure 4 A perspective view of a reflective surface of a light emitting module and a second light source and a third light source;

[0032] [ Figure 6 ] is Figure 4 A graphical representation of a luminous image of a light beam generated by a luminous module;

[0033] [ Figure 7 ] is a longitudinal cross-sectional schematic diagram of a light emitting module according to a third embodiment of the present invention;

[0034] [ Figure 8 ]yes Figure 7 A perspective view of a reflective surface and a light source of a light emitting module;

[0035] [ Fig. 9 ] is Figure 7 A graphical representation of the luminous image of the light beam produced by the luminous module. DETAILED DESCRIPTION

[0036] In the following description, the concepts "front", "in front of", "rear" and "behind" are to be understood relative to a main propagation direction of light from one or more light sources to the optical projection system (ie along the optical axis).

[0037] Figures 1 to 3 A lighting module according to a first embodiment of the present invention is shown.

[0038] Figure 1is a schematic longitudinal section of a light module. The light module 2 comprises a first light source 4 and a first reflective surface 6, which is configured to collect light emitted by the first light source 4 and reflect these light rays to form a first light beam. The first reflective surface preferably has an elliptical profile, and is advantageously a revolving surface formed by rotating the profile to form a concave shape, in this case a skull or half-shell shape. However, it will be understood that the first reflective surface is not necessarily a revolving surface; it can deviate from such a configuration, in particular to slightly correct certain aberrations and / or modify the light beam. An auxiliary reflective surface 8 (herein referred to as a deflector) is placed in front of the first reflective surface 6, wherein the front edge 10 is located at the focus of the surface and forms a cutoff forming edge. The first light source 4 is located at another focus of the first reflective surface 6. Therefore, the light emitted by the first light source 4 is substantially collected and reflected towards the cutoff forming edge. The light beam that encounters the deflector 8 behind the cutoff forming edge 10 is reflected upward. The deflector 8 is advantageously planar and aligned with the optical axis 12 of the light module 2. The projection lens 14 forming the projection optical system is placed in front of the optical axis 12. The projection lens is configured to deviate the light emitted by the first light source 4 and reflected by the first reflective surface 6 and possibly by the deflector 8, thereby forming a first light beam 16. The first light beam comprises a horizontal cut-off defined by a cut-off forming edge 10. The horizontal cut-off may comprise a bend in the optical axis. In this case, the cut-off forming edge 10 is not a straight line but a bend. This configuration itself is known to those skilled in the art and does not require further explanation.

[0039] The lighting module 2 includes a second light source 18 and a second reflective surface 20, which is configured to collect the light emitted by the second light source 18 and reflect the light to form a second light beam. Figure 1 As can be seen in FIG. 1 , the second light source 18 is axially offset relative to the first light source 4. More specifically, the second light source 18 is located in front of the first light source 4. The two light sources 4 and 18 illuminate in the same direction, in this case considering Figure 1 The orientation of the two light sources 4 and 18 (wherein the optical axis is horizontal) is vertically illuminated downwards. In the present case, the two light sources 4 and 18 are at the same distance from the optical axis 12, but this may not be the case.

[0040] The second reflective surface 20 advantageously has an elliptical or parabolic profile. The second reflective surface advantageously is a surface of revolution around an axis parallel or coincident with the optical axis. Alternatively, the second reflective surface may be a free-form surface or a swept surface or a problem of an asymmetric surface. The second reflective surface may also include a plurality of sections or segments.

[0041] The expression "parabolic" is usually applied to reflectors whose surfaces have a single focus, i.e., a light convergence area, i.e., an area such that the light emitted by a light source placed in this convergence area is projected to a long distance after reflection from the surface. Projected to a long distance means that these light rays do not converge towards an area located at least 10 times the size of the reflector. In other words, the reflected light rays do not converge towards a certain convergence area, or if the reflected light rays converge, this convergence area is also located at a distance greater than or equal to 10 times the size of the reflector. A parabolic surface can therefore be characterized by a parabolic section or not. 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 light reflected by the elliptical reflector.

[0042] The light source 18 is placed at the focal point of the second reflective surface 20 so that its light is collected and reflected along the optical axis 12 .

[0043] The projection lens 14 has a focal point 14.1 which is advantageously positioned along the optical axis 12, perpendicular to the second light source 18 (or as in the present case, behind said light source). In the present case, the focal point 14.1 is located on or near the second reflective surface 20 and preferably less than 10 mm therefrom and more preferably less than 5 mm therefrom. Furthermore, the projection lens 14 has a depth of field which is sufficient to obtain an astigmatism of at least some of the second reflective surface 20. Advantageously, the depth of field of the projection lens 14 is at least 30% of the second reflective surface 20 along the optical axis and advantageously the entire extent.

[0044] The projection lens 14 is advantageously a so-called thin lens and has, for example, a thickness of less than 6 mm. This is possible when the light rays to be deflected have a small inclination. For this purpose, at least some of these reflected light rays may have an inclination angle α in the vertical plane relative to the axis which is less than or equal to 25° and preferably less than or equal to 10°, so that the so-called paraxial approximation applies. Advantageously, these light rays are reflected by the rear portion of the second reflecting surface 20.

[0045] By means of the arrangement as described above, the projection lens 14 therefore images the second reflective surface 20 when it is illuminated, and more specifically images the section of the reflective surface closest to the focus 14.1. Advantageously, this section is located on the rear edge 20.1 of the second reflective surface 20 to ensure that the edge in question is imaged. This allows the generation of a vertically focused second beam. However, in practice, the focus 14.1 is located at a distance from the rear edge 20.1 (i.e., in front of the edge) in order to vertically widen the second beam. Imaging the rear edge 20.1 of the second reflective surface 20 with a certain accuracy allows a lower horizontal cutoff to be formed in the second beam 22. The second reflective surface 20 has a front edge 20.2 that will define the upper limit of the second beam 22.

[0046] If the second reflecting surface 20 is elliptical, it has a second focus which is located in front of the projection lens 14 and at a distance from the optical axis 12. It will be noted that it is also possible that this focus is located behind the projection lens and / or on the optical axis (provided it is near the lens), thereby reducing the width of the beam at the entrance face of the projection lens.

[0047] The first 6 and second 20 reflecting surfaces and the auxiliary reflecting surface 8 (deflector) may be formed on the same carrier forming the light collector 24. The shell-shaped or skull-shaped light collector 24 is advantageously made of a material with good heat resistance and, for example, of glass or a synthetic polymer such as polycarbonate PC or polyetherimide PEI.

[0048] Figure 2 The second light source 18 and the second reflective surface 20 are shown in a perspective view. As can be seen, the light source 18 comprises a plurality of luminous areas 18.1 on a carrier 18.2, which are individually activatable. It can be a matter of a plurality of light-emitting diodes 18.1 placed on a printed circuit board 18.2. The second reflective surface 20 is segmented transversely to the optical axis to form mutually adjacent reflective surface strips 20.3. Each of the reflective surface strips 20.3 has a cross section forming a hollow profile. Therefore, each of the reflective surface strips 20.3 has two lateral edges 20.4 at the border with the directly adjacent reflective surface strips 20.3. Each reflective surface strip 20.3 corresponds to a luminous area 18.1, and vice versa. When a specific luminous area 18.1 is activated and emits light, these light rays mainly illuminate the corresponding reflective surface strips 20.3. These light rays can also illuminate adjacent reflective surface strips 20.3, but with an angle that is not very favorable for focusing along the optical axis or at least with a limited tilt angle relative to the axis. Once reflected, these rays will be partially scattered. This means that the lateral edge 20.4 forms a lateral cut-off in the second beam.

[0049] Figure 3 Schematically the luminous images of the first light beam 16 and the second light beam 22 are shown. It can be observed that the first beam 16 generated by the first light source 4, the first reflecting surface 6, the auxiliary reflecting surface and the projection lens 14 is a beam comprising a horizontal top cut-off line, in this case extending along the neutral horizontal axis H. Therefore, this can be a problem of a low-beam beam or a part of such a beam. The second light beam 22 consists of additional sub-beams, each sub-beam corresponding to one of the luminous areas of the second light source and to a corresponding reflecting surface strip. These sub-beams are laterally adjacent. These sub-beams have a common horizontal bottom cut-off line, in this case extending along the neutral horizontal axis H, which is formed by the rear edge 20.1 of the second reflecting surface 20 ( Figure 1 These sub-beams also have a common horizontal top cut-off line formed by the front edge 20.2 of the second reflecting surface 20 ( Figure 1 ). However, the cut-off line may be less sharp than the horizontal bottom cut-off line, essentially because the distance between the focus 14.1 of the projection lens and the front edge 20.2 is greater ( Figure 1 ). The second light beam 22 can be combined with the first beam 16 to form a segmented high-beam beam, ie a high-beam beam which can be modulated laterally by activating a useful light-emitting area of ​​the second light source.

[0050] Figures 4 to 6 A second embodiment of the present invention is shown. The reference numerals of the first embodiment have been used to designate corresponding or identical elements, however, these reference numerals are increased by 100. In addition, reference is made to the description of these elements given with respect to the first embodiment. Specific elements have been designated by specific numbers included between 100 and 200.

[0051] The second embodiment differs from the first embodiment substantially in the presence of a third light source and a third reflecting surface forming a third light beam.

[0052] Figure 41 is a schematic longitudinal cross-sectional view of a light module according to a second embodiment. Similar to the first embodiment, the light module 102 comprises a first light source 104, an associated first reflective surface 106 and an associated auxiliary reflective surface 108 (referred to as a deflector), the auxiliary reflective surface having a front edge 110 forming a cut-off line, thereby forming a first light beam 116 containing a horizontal top cut-off line. Similar to the first embodiment, the light module 102 also comprises a second light source 118 and an associated second reflective surface 120, thereby forming a second light beam 122. However, with respect to the first embodiment, the length (along the optical axis) of the second reflective surface 120 is advantageously small, thereby forming a light image of a smaller height by means of a supplementary beam. This second light beam 122 has a horizontal bottom cut-off line substantially formed by a rear edge 120.1 of the second reflective surface, which is imaged by a projection lens 114. In the present case, the projection lens is plano-convex, but it will be understood that other configurations are possible. The converging optical system 126 is optically placed between the second light source 118 and the second reflective surface 120. The converging optical system is configured to concentrate the light emitted by the second light source 118 towards the rear edge 120.1 of the second reflecting surface 120. In the present case, the converging optical system 126 is a series of lenses placed facing each of the light emitting areas of the second light source 118.

[0053] The lighting module 102 includes a third light source 128 arranged in front of the second light source 118. The lighting module illuminates in the same direction as the first and second light sources, in this case considering Figure 4 The third reflective surface 130 is placed in front of the second reflective surface 120 and is preferably adjacent to the second reflective surface 120. Similar to the second reflective surface 120, the third reflective surface 130 advantageously has an elliptical or parabolic profile. The second reflective surface is advantageously a surface of revolution around an axis parallel to or coincident with the optical axis. Alternatively, the second reflective surface can be a free-form surface or a swept surface or an asymmetric surface. The second reflective surface can also include multiple sections or segments.

[0054] The third light source 128 is placed at the focus of the third reflective surface 130 so that its rays are collected and reflected along the optical axis 112. At least some of these reflected rays may have an inclination angle β in the vertical plane relative to the axis, which is less than or equal to 25° and preferably less than or equal to 10°, so that the so-called paraxial approximation applies. Advantageously, these rays are reflected by the rear portion of the third reflective surface 130. Thus, the third light source 128, the third reflective surface 130 and the projection lens 114 form a third light beam, which also contains a horizontal bottom cut-off line located above the second light beam 122.

[0055] Similar to the first embodiment, the sharpness of the horizontal cut-off depends on the position of the focal point 114.1 of the projection lens 114. If the focal point is located on or at least in the vicinity of the rear edge 120.1 of the second reflective surface 120, the cut-off of the second beam 122 will be sharp. If the focal point is located further towards the front at a distance from the rear edge 120.1, the sharpness of the cut-off of the second beam 122 will decrease; conversely, the sharpness of the cut-off of the third beam 132 will increase as the distance between the focal point and the rear edge 130.1 of the third reflective surface decreases. As already mentioned with respect to the first embodiment, the sharpness of the horizontal cut-off will also depend on the depth of field of the projection lens 114.

[0056] Figure 5 1 is a perspective illustration of the reflective surfaces 106, 120 and 130 and the second and third light sources 118 and 128. It can be observed that each of the second and third light sources 118 and 128 comprises a series of light emitting areas that are laterally distributed, individually activatable, and aligned with the lateral segments that divide the second and third reflective surfaces 120 and 130 into reflective surface strips 120.3 and 130.3.

[0057] The converging optical system 126 comprises a series of converging lenses, each of which is optically placed between one of the light emitting areas of the second light source 118 and a corresponding reflective surface strip 120 . 3 of the second reflective surface 120 .

[0058] Figure 6 Schematically the luminous images of the first light beam 116, the second light beam 122 and the third light beam 132 are shown. Similar to the first embodiment, the first beam 116 is a beam comprising a horizontal top cut-off line, in this case extending along the neutral horizontal axis H. This can therefore be a matter of a low-beam beam or a part of such a beam. The second beam 122 consists of additional sub-beams, each of which corresponds to one of the luminous areas of the second light source and to a corresponding reflective surface strip. These sub-beams are laterally adjacent. These sub-beams have a common horizontal bottom cut-off line, in this case extending parallel to the neutral horizontal axis H, above or below said horizontal axis H, which is formed by the rear edge 120.1 of the second reflective surface 120 ( Figure 4 These sub-beams also have a common horizontal top cut-off line formed by the front edge 120.2 of the second reflecting surface 120 ( Figure 4 ). However, the cut-off line may be less sharp than the horizontal bottom cut-off line, essentially because the distance between the focus 114.1 of the projection lens and the front edge 120.2 is greater ( Figure 4). The second beam 122 allows to supplement the first beam 116 in order to form a low-beam lighting beam. The selective activation of the sub-beams allows to form an overall beam containing a cut-off line of a kink. In addition, the selective activation of these sub-beams allows the position of the bend to be moved according to the bend that the vehicle is taking, and thus realizes a DBL function (DBL stands for dynamic bending light). The third light beam 132 is similar to the second light beam 122, except that the third light beam is located above the second light beam and has a greater height. The sub-beams of the second beam and the third beam are aligned in this case but can be laterally offset. The second light beam 122 and the third light beam 132 can be combined with the first beam 116 to form a segmented high-beam beam, that is, a high-beam beam that can be laterally modulated by activating the useful light-emitting areas of the second light source and the third light source.

[0059] Figures 7 to 9 A third embodiment of the invention is shown. Reference numerals from the second embodiment have been used to designate corresponding or identical elements, however, these reference numerals are increased by 100. Furthermore, reference is made to the description of these elements given in relation to the second embodiment.

[0060] The third embodiment is similar to the second embodiment and differs substantially in that the first beam containing the horizontal top cutoff and the components producing it are absent. The second beam and the third beam of the second embodiment thus become the first beam and the second beam of the third embodiment.

[0061] Figure 7 2 is a schematic longitudinal cross-sectional view of a light emitting module according to a third embodiment of the present invention. The light emitting module 202 comprises a first light source 218 and an associated first reflective surface 220, which is configured to collect light and reflect these light along the optical axis 212, and thus at least some of these reflected light rays have an inclination angle α in a vertical plane relative to the axis that is less than or equal to 25°, and preferably less than or equal to 10°, so that the so-called paraxial approximation applies, thereby allowing to obtain de-astigmatism, that is, a sharp projected image. The first light source 218 and the first reflective surface 220 then generate a first light beam 222 with a horizontal bottom cutoff line using a projection lens 214. The light emitting module 202 further comprises a second light source 228 and an associated second reflective surface 230, which is configured to collect light and reflect these light along the optical axis 212, and thus at least some of these reflected light rays have an inclination angle β in a vertical plane relative to the axis that is less than or equal to 25°, and preferably less than or equal to 10°, so that the so-called paraxial approximation applies. The second light source 228 and the second reflective surface 220 then generate a second light beam 232 with a horizontal bottom cutoff line using the projection lens 214 , which is located above the first light beam 222 .

[0062] Similar to the first and second embodiments, the sharpness of the horizontal cut-off line depends on the position of the focal point 214.1 of the projection lens 214. If the focal point is located on or at least in the vicinity of the rear edge 220.1 of the first reflective surface 220, the cut-off line of the first beam 222 will be sharp. If the focal point is located further toward the front at a distance from the rear edge 220.1, the sharpness of the cut-off line of the first beam 222 will decrease; conversely, the sharpness of the cut-off line of the second beam 132 will increase as the distance between the focal point and the rear edge 130.1 of the second reflective surface decreases.

[0063] Figure 8 2 is a perspective illustration of the reflective surfaces 220 and 230 and the second and third light sources 118 and 128. It can be observed that each of the second and third light sources 118 and 128 includes a series of light emitting areas that are laterally distributed, individually activatable, and aligned with the lateral segments that divide the second and third reflective surfaces 220 and 230 into reflective surface strips 220.3 and 230.3.

[0064] Fig. 9 Schematically illustrated are the luminous images of the first light beam 222 and the second light beam 232. The first light beam 122 consists of additional sub-beams, each of which corresponds to one of the luminous areas of the first light source and to a corresponding reflective surface strip. These sub-beams are laterally adjacent. These sub-beams have a common horizontal bottom cut-off line, in this case parallel to the neutral horizontal axis H, extending on or below said axis, which is formed by the rear edge 220.1 of the first reflective surface 220 ( Figure 7 These sub-beams also have a common horizontal top cut-off line formed by the front edge 220.2 of the first reflecting surface 220 ( Figure 7 ). However, the cut-off line may be less sharp than the horizontal bottom cut-off line, essentially because the distance between the focus 214.1 of the projection lens and the front edge 220.2 is greater ( Figure 7 ). The second light beam 232 is similar to the first light beam 222, except that the second light beam is located above the first light beam and has a greater height. The sub-beams of the first beam and the second beam are aligned in this case but can be laterally offset. The first beam 222 can be combined with a beam containing a horizontal top cutoff to produce a low-beam lighting beam. Selective activation of the sub-beams allows the formation of an overall beam containing a bend cutoff. The selective activation of these sub-beams allows the position of the bend to be moved depending on the curve the vehicle is taking, and thus achieves a DBL function. The first light beam 222 and the second light beam 232 can be combined with a beam containing a horizontal top cutoff generated by another module to produce a matrix-type high-beam lighting beam, that is, a high-beam beam that can be modulated laterally by activating the useful light-emitting areas of the second light source and the third light source.

Claims

1. A light emitting module for a motor vehicle (2; 102； 202), the light emitting module comprises: - a first reflecting surface (6; 106; 220) and a first light source (4; 104; 218) capable of emitting light, the first reflecting surface being configured to collect the light emitted by the first light source and to reflect the light into a first light beam (16; 116; 222) along an optical axis (12; 112; 212) of the module; - a second light source (18; 118; 228) and a second reflecting surface (20; 120; 230), the second reflecting surface being configured to collect light emitted by the second light source and to reflect the light into a second light beam (22; 122; 232) along the optical axis (12; 112; 212); - an optical system (14; 114; 214) configured to project the first light beam and the second light beam (16, 22; 116, 122; 222, 232); It is characterized in that The first light source and the second light source (4, 18; 104, 118; 218, 228) emit the light in the same direction, the first reflective surface and the second reflective surface (6, 20; 106, 120; 220, 230) are offset along the optical axis (12; 112; 212), and the optical system (14; 114; 214) is configured to form an image of the second reflective surface (20; 120; 230); The first reflective surface (220) is adjacent to and behind the second reflective surface (230), and the optical system (214) is configured to also form an image of the first reflective surface (220).

2. The light-emitting module (2; 102; 202) according to claim 1, characterized in that: The first reflecting surface and the second reflecting surface (4, 18; 104, 118; 218, 228) are formed on the same light collector (24; 124; 224).

3. The lighting module (2; 102; 202) according to any one of claims 1 and 2, characterized in that: The second reflective surface (20; 120; 230) is segmented transversely to the optical axis (12; 112; 212) to form adjacent reflective surface strips (20.3; 120.3; 230.3), and the second light source (18; 118; 228) includes a plurality of individually activatable light-emitting areas, which extend laterally and are associated with the adjacent reflective surface strips.

4. The lighting module (2; 102; 202) according to any one of claims 1 to 3, characterized in that: The second reflecting surface (20; 120; 230) comprises a rear edge (20.1; 120.1；230.1)。 5. The lighting module (2; 102; 202) according to any one of claims 1 to 4, characterized in that: The optical system (14; 114; 214) has a focal point (14.1; 114.1; 214.1) located on the second reflecting surface (20; 120; 230) or at a distance less than 10 mm from the second reflecting surface.

6. The lighting module (2; 102; 202) according to claim 4 and 5, characterized in that The focal point (14.1; 114.1; 214.1) of the optical system (14; 114; 214) is located on the second reflecting surface (20; 120; 230) on the rear edge (20.1; 120.1; 230.1) or at a distance less than 10 mm from the rear edge.

7. The lighting module (2; 102; 202) according to any one of claims 1 to 6, characterized in that Each of the first and second reflecting surfaces (6, 20; 106, 120; 220, 230) has an elliptical or parabolic profile.

8. The lighting module (102) according to any one of claims 1 to 7, characterized in that: The lighting module further comprises a focusing device (126) which is optically placed between the second light source (118) and the second reflective surface (120) and is configured to focus light emitted by the second light source toward a rear edge (120.1) of the second reflective surface (120).

9. The light emitting module (202) according to claim 1, characterized in that: The first reflective surface (220) is segmented transversely to the optical axis (212) to form adjacent reflective surface strips (230.3), and the first light source (218) includes a plurality of individually activatable light emitting areas extending transversely and associated with the adjacent reflective surface strips.

10. The light emitting module (202) according to claim 1, wherein: At least some of the light rays reflected by the first reflecting surface have an inclination angle α with respect to the optical axis in a vertical plane that is less than or equal to 25°, or less than or equal to 10°.

11. The light emitting module (202) according to claim 1, wherein: The first light beam has a horizontal bottom cutoff line formed by a rear edge of the first reflective surface, and the first light beam has a horizontal top cutoff line formed by a front edge of the first reflective surface.

12. The light emitting module (202) according to claim 1, wherein: The distance between the focal point (214.1) of the optical system and the rear edge (220.1) of the first reflecting surface is smaller than the distance between the focal point and the front edge (220.2) of the reflecting surface.

13. The light emitting module (202) according to claim 1, wherein: The focal point (214.1) of the optical system is located at the rear edge (220.1) of the first reflecting surface (220), or at a position less than 10 mm from the rear edge.

14. The light emitting module (202) according to claim 1, wherein: The optical system comprises a projection lens.

15. The light emitting module (202) according to claim 14, wherein: The projection lens is a thin lens, and the thickness of the projection lens is less than 6 mm.

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