Multifunction lighting module for a motor vehicle

Abstract

The invention relates to a lighting module (102) for a motor vehicle, comprising a first light source (104); a first collector (106); a second light source (110); a second collector (112) adjacent to the first collector (106); an optical projection device (108) for projecting the light rays reflected by the first and second collectors (106, 112), with a first entry face (108.1.1) and a second entry face (108.1.2); a dividing partition (118) separating the light rays reflected by the first collector (106) and the light rays reflected by the second collector (112); wherein the dividing partition (118) is made of a material that is transparent or translucent in the visible spectrum, and is configured to transmit a fraction of the light rays reflected by one of the first and second collectors (106, 112) toward the opposite entry face (108.1.2).

Description

[0001] DESCRIPTION

[0002] MULTIFUNCTION LIGHTING MODULE FOR MOTOR VEHICLE

[0003] Technical field

[0004] The invention relates to the field of lighting, in particular lighting for motor vehicles.

[0005] Prior art

[0006] The published patent document FR 3 093 789 A1 discloses a light device imaging the illuminated surfaces of at least two collectors in order to participate in the realization of two lighting functions. For this purpose, the light sources are arranged on either side, vertically, of the optical axis and so as to illuminate in opposite directions. The light rays reflected by the upper collector are projected by an upper part of an optical projection device into a first light beam and the light rays reflected by the lower collector are projected by a lower part of the optical projection device into a second light beam. The first light beam participates in the realization of a first lighting function, and the first and second light beams together participate in the realization of a second lighting function.An absorbent screen is arranged between the light sources and the optical projection device, essentially along the optical axis. This screen is intended to prevent any transmission of light rays from the upper part to the lower part and vice versa. This lighting device, however, has the disadvantage that when the first function is active, only the upper part of the optical projection device is illuminated. The lower part of the optical projection device is not illuminated. On the contrary, when the second lighting function is active, the upper part and the lower part of the optical projection device are illuminated. In other words, the optical projection device is completely illuminated. The optical projection device therefore has at least two illuminated aspects, one where it is completely illuminated and one where only a part is illuminated.This difference in illuminated appearance between the two lighting functions is, however, undesirable, particularly from an aesthetic point of view and from a motor vehicle styling point of view. In addition, the presence of the absorbent screen has the effect of creating a dark area on the optical projection device, between the upper part and the lower part of the optical projection device when the second lighting function is active.

[0007] Statement of the invention

[0008] The object of the invention is to overcome at least one of the drawbacks of the aforementioned state of the art. More particularly, the objective of the invention is to enable a multifunctional lighting device or module to have an appearance of the optical projection device which is homogeneous according to the different lighting functions emitted, as well as when no lighting function is active.

[0009] The invention relates to a lighting module, in particular for a motor vehicle, comprising at least one first light source capable of emitting first light rays; a first collector with a first reflective surface configured to reflect the first light rays into first reflected light rays along a first main direction parallel to an optical axis of the lighting module; at least one second light source capable of emitting second light rays; a second collector adjacent to the first collector and with a second reflective surface configured to reflect the second light rays into second reflected light rays along a second main direction parallel to the first main direction;an optical device for projecting, along the optical axis, the first and second reflected light rays, with a first entry face for the first reflected light rays and a second entry face for the second reflected light rays; a separating partition between the first reflected light rays and the second reflected light rays, extending between the optical projection device and the first and second collectors; wherein the separating partition is made of a transparent or translucent material, in the visible spectrum, configured to transmit a fraction of the first reflected light rays to the second entry face and / or a fraction of the second reflected light rays to the first entry face.;

[0010] The optical projection device makes it possible to project, via the first input face, the first reflected rays into a first light beam. The optical device also makes it possible to project, via the second input face, the second reflected rays into a second light beam.

[0011] For example, the first light beam may participate in performing a first lighting function, and the first and second light beams may together participate in performing a second lighting function. Where appropriate, the first lighting function may be a function with a higher horizontal cutoff, of the "low beam" type, and the second lighting function may be a function without a horizontal cutoff, of the "high beam" type.

[0012] Alternatively, the first light beam may participate in performing a first lighting function, and the second light beam may participate in performing a second lighting function.

[0013] According to an advantageous embodiment of the invention, the fraction of the first or second reflected light rays transmitted towards the second or first input face, respectively, is between 5 and 30% in light intensity of said first or second reflected light rays.

[0014] According to an advantageous embodiment of the invention, the translucent material is opalescent.

[0015] According to an advantageous embodiment of the invention, the translucent material has, in the visible spectrum, a translucency rate greater than or equal to 30% according to the ASTM D1003-21 test.

[0016] According to an advantageous embodiment of the invention, the translucent material is absorbent in the visible spectrum and has, in said visible spectrum, an absorption coefficient a, where 0.5 mm -1 >a>0.3mm _1 , following the Beer-Lambert law.

[0017] According to an advantageous embodiment of the invention, the separating partition has a light exit face facing the optical projection device.

[0018] According to an advantageous embodiment of the invention, the lighting module further comprises at least one auxiliary light source arranged so as to illuminate at least one light entry face of the partition wall. Advantageously, the at least one auxiliary light source is arranged opposite the at least one light entry face. According to an advantageous embodiment of the invention, the at least one light entry face of the partition wall is opposite the light exit face of said partition wall and transverse to the optical axis.

[0019] According to an advantageous embodiment of the invention, the at least one first light source and the at least one second light source are arranged to illuminate in directions transverse to the optical axis which are opposite, the at least one first light source and the first collector being arranged above the at least one second light source and the second collector, when the lighting module is in the normal mounting position.

[0020] According to an advantageous embodiment of the invention, the at least one first light source and the at least one second light source are arranged so as to illuminate in main directions, respectively, which are transverse to the optical axis and on either side, horizontally, of said optical axis, when the lighting module is in the normal mounting position.

[0021] Advantageously, the lighting module comprises at least one transverse screen arranged between at least one of the first and second collectors and the optical projection device, so as to intercept parasitic rays among the first and / or second reflected light rays, the at least one transverse screen being made of a transparent or translucent material, in the visible spectrum, configured to transmit a fraction of the intercepted parasitic rays towards the first and / or second input face of the optical projection device.

[0022] The measures of the invention are advantageous in that they make it possible to ensure an illuminated appearance of the entire optical projection device, during the emission of the first light beam alone, of the second light beam alone and of simultaneous remission of the first and second light beams, and this by simple, economical and space-saving means.

[0023] The measures of the invention also make it possible to ensure a satisfactory unlit appearance. The graining and / or the translucent or opalescent property of the material forming the partition wall and / or the transverse screens make it possible to provide a homogeneous unlit appearance masking certain details of the interior construction of the lighting module. The absorbent property of the material forming the partition wall makes it possible to improve the unlit appearance because the partition wall is then darkened. The absorbent property of the material forming the partition wall also makes it possible to limit the number of first and second reflected rays that can pass to the other side of the partition wall, and thus to limit the quantity of first reflected rays that interfere with the second reflected rays.

[0024] Brief description of the drawings

[0025] [Fig 1] is a schematic sectional view of a dual-function lighting module according to the state of the art, when both functions are active;

[0026] [Fig 2] corresponds to figure 1, where only one function is active;

[0027] [Fig 3] is a schematic sectional view of a dual-function lighting module where only one function is active, according to a first embodiment of the invention, where the separating partition is transparent and grained;

[0028] [Fig 4] corresponds to figure 3, where the partition wall is translucent or opalescent;

[0029] [Fig 5] corresponds to Figure 3, where the partition wall is translucent or opalescent and absorbent;

[0030] [Fig 6] is a schematic sectional view of a dual-function lighting module according to a second embodiment of the invention.

[0031] Detailed description

[0032] In the description of the invention, the notions of relative positioning such as "upper", "above", "lower", "below", "upwards", "downwards", "lateral", "left", "right", etc. are to be understood when the lighting module is in the normal and operational position, as illustrated in the figures.

[0033] Figures 1 and 2 illustrate a dual-function lighting module according to the state of the art.

[0034] The lighting module 2 comprises a first light source 4 illuminating in a main direction directed upwards, a first collector 6 with a cap-shaped reflective surface whose opening is directed towards the first light source 4, a first projection lens 8a of the rays reflected by the first collector 6. The first projection lens 8a projects the rays reflected by the first collector 6 into a first light beam.

[0035] The lighting module 2 further comprises a second light source 10, illuminating in a main direction directed downwards, a second collector 12 with a cap-shaped reflecting surface whose opening is directed towards the second light source 10, a second projection lens 8b of the rays reflected by the second collector 12. The second projection lens 8b projects the rays reflected by the second collector 12 into a second light beam.

[0036] The first projection lens 8a and the second projection lens 8b are in one piece and form an optical projection device 8. The first projection lens 8a and the second projection lens 8b each have an input face and an output face. The optical projection device 8 comprises an upper input face 8.1.1, formed by the input face of the first projection lens 8a, and a lower input face 8.1.2 formed by the input face of the second projection lens 8b. The optical projection device 8 also comprises an output face 8.2 formed by the output faces of the first projection lens 8a and the second projection lens 8b and essentially covering the upper 8.1.1 and lower 8.1.2 input faces.

[0037] The first and second light sources 4 and 10 and the first and second collectors 6 and 12, and the optical projection device 8 are aligned along an optical axis 14 of the lighting module 2.

[0038] It should be noted that each of the first and second projection lenses 8a, 8b comprise a specific optical axis associated with the first and second light sources. The optical axis 14 of the lighting module can then be considered as a mean optical axis of the optical projection device 8 formed by the first and second projection lenses 8a, 8b.

[0039] The first and second light sources 4 and 10 are opposite each other. In particular, the first and second light sources 4, 10 are arranged on opposite faces of a common support 16. The common support 16 also serves as a heat sink. In the example illustrated, the common support 16 is aligned with the optical axis 14. The main emission axis of each light source 4, 10 is thus perpendicular to the optical axis 14.

[0040] The lighting module 2 also comprises a separating partition 18 extending along the optical axis 14, between, on the one hand, the first and second light sources 4 and 10, and, on the other hand, the optical projection device. This separating partition 18 is opaque and thus blocks any light ray from the first light source 4, in particular reflected by the first collector 6, likely, in the absence of the separating partition 18, to reach the lower entry face 8.1.2 of the optical projection device 8 and thus disturb the light beam normally produced by the second light source 10 and the second collector 12. The same applies to the light rays from the second light source 10, in particular reflected by the second collector 6, likely, in the absence of the separating partition 18, to reach the upper entry face 8.1.1 of the optical projection device 8.

[0041] It should be noted that the first projection lens 8a and the second projection lens 8b each have a focus located on the reflective surface of the first collector 6, respectively on the reflective surface of the second collector 12, so as to image the reflective surfaces then illuminated by the corresponding light source. In particular, the focus of the first projection lens 8a may be located in the vicinity of a rear edge of the first collector 6 and / or the focus of the second projection lens 8b may be located in the vicinity of a rear edge of the second collector 12. By "located in the vicinity" is meant located at a distance less than or equal to 10 mm.

[0042] The reflective surface of each of the first and second collectors 6 and 12 has an essentially elliptical or parabolic profile with a focus located at the corresponding light source, so that the rays thus emitted are reflected towards the optical projection device 8. The light beam thus projected is an inverted image of the illuminated reflective surface. In the case where the profile is elliptical, it may comprise a second focus located near the optical projection device 8 or in front of the optical projection device 8, considering the direction of light emission in the lighting module 2. Figure 1 illustrates the lighting module 2 when the first light beam and the second light beam are emitted. The output face 8.2 of the optical projection device 8 is shown in front view, to the right of Figure 1. It can be seen that the entire output face 8.2 is illuminated, the upper part being illuminated by the first light beam and the lower part being illuminated by the second light beam.

[0043] Figure 2 illustrates the lighting module 2 when only the first light beam is emitted. The output face 8.2 of the optical projection device 8 is shown in front view, to the right of Figure 2. It can be seen that only the upper part of the output face 8.2 is illuminated, the lower part remaining completely unlit and therefore dark compared to the upper part. This situation can occur in particular when the first light beam participates in the formation of a first lighting function taking the form of a lighting function with a higher horizontal cutoff, namely for example a “low beam” or “dipped beam” function, capable of operating without the second light beam.

[0044] The second light beam may for example be a beam without horizontal cut-off and form a “complementary main beam” beam distribution, which added to the “low beam” function makes it possible to form a “high beam” function, sometimes referred to by the expression “full beam” or even by the Anglo-Saxon expression “high-beam”. Thus, the activation of the second lighting function causes both the upper part of the output face 8.2 to be illuminated, and the lower part of the output face 8.2 to be illuminated, as shown in Figure 1.

[0045] The illuminated appearance of the optical projection device 8 is therefore different between the first lighting function, where the optical projection device is partially illuminated, and the second lighting function where the optical projection device is fully illuminated. This difference in the illuminated appearance of the lighting module is aesthetically and stylistically undesirable.

[0046] Figure 3 illustrates a lighting module according to a first embodiment of the invention. The reference numbers of the lighting module in Figures 1 and 2 are used to designate identical or corresponding elements, these numbers being increased by 100. Reference is also made to the description of these elements in relation to Figures 1 and 2. Specific reference numbers between 100 and 200 are used to designate the elements specific to this embodiment.

[0047] The lighting module 102 of Figure 3, according to the first embodiment of the invention, differs from the lighting module of Figures 1 and 2, essentially in that the separating partition 118 is transparent and grained, so as to allow a fraction of the light rays reflected by the first collector 106, namely the rays incident on the upper face 118.1 of the separating partition 118, to pass through the separating partition 118 and propagate towards the lower input face 108.1.2 of the optical projection device 108. This thus allows the output face 108.2 of the optical projection device 108, illustrated in front view on the right of Figure 3, to have an illuminated appearance over its entire extent when only one of the first and second light beams is emitted.

[0048] In Figure 3, it can be seen that the first light beam, produced by the first light source 104, the first collector 106, and the first projection lens 108a is active and illuminates through the separating partition 118 the lower entry face 108.1.2 of the optical projection device 108. It is however understood that the reverse is also true, namely that the second light beam produced by the second light source 110, the second collector 112 and the second projection lens 108b, when it is active, can illuminate through the separating partition 118 the upper entry face 108.1.1 of the optical projection device 108.

[0049] The graining of the separating partition 118 can be carried out on one or each of the upper 118.1 and lower 118.2 faces. When only one of the first and second light beams is capable of being activated alone, only the face of the separating partition 118 facing the collector reflecting the rays from which this first or second light beam is formed can be grained. With reference to FIG. 3, the first light beam, produced by the first light source 104, the first collector 106 and the first projection lens 108a, is capable of being activated alone to form the first lighting function. The first lighting function can be an automotive lighting function with an upper horizontal cutoff, namely for example a “low beam” or “dipped beam” function or by the English expression “low beam”. Only the upper surface 118.1 of the separating partition 118 can then be grained so as to diffuse, in the thickness of the separating partition 118, the light rays incident on said face. These rays then pass through the diopter formed by the lower face 118.2 and propagate in the air to the lower entry face 108.1.2 of the optical projection device 108, as illustrated in FIG. 3.

[0050] It should also be noted that the separating partition 118, due to its transparent material, may have a light exit face 118.3 facing the optical projection device 108. This light exit face 118.3 is in this case a front face of the separating partition 118, arranged directly facing the optical projection device 108. A portion of the light diffused in the separating partition 118 from one of the upper 118.1 and lower 118.2 faces, may propagate along the separating partition 118, by successive total reflections, the separating partition 118 then acting as a light guide. The light leaving the light exit face 118.3 then enters the optical projection device 108 at the junction of the upper 108.1.1 and lower 108.1.2 entry faces. This light provides illumination of the exit face 108.2 at the junction of the upper and lower parts corresponding to the upper 108.1.1 and lower 108.1.2 entry faces.

[0051] The configuration of the separating partition 118 as in FIG. 3 has the advantage of providing a relatively uniform illuminated appearance of the output face 108.2 of the optical projection device while only one of the first and second light beams is active, and this without adding complex and expensive elements such as additional light sources. However, it has the disadvantage that the fraction of the light rays of one of the first and second light beams which passes through the separating partition 118 is large enough to interfere with the formation of the other of the first and second light beams. This phenomenon is commonly referred to by the English expression “cross-talk”. Also, when all the first and second beams are inactive, the extinguished appearance of the output face 108.2 of the optical projection device 108 has a white or milky appearance, whereas it is generally desirable to have a dark and matte appearance. Figure 4 illustrates a lighting module according to the first embodiment of the invention, such as in Figure 3, where however the separating partition 1 18' is translucent or opalescent. A material is said to be translucent if it lets light pass through without allowing objects to be clearly distinguished, due to multiple anisotropic refractions of the light rays. Opalescence is the optical property of a transparent or translucent material which gives it a milky appearance or tint, with iridescent reflections reminiscent of those of opal.

[0052] The degree of translucency or opalescence in a material can be determined according to the ASTM D1003-21 test method. When a material has a degree of translucency or “haze” of more than 30%, it is then considered to be diffusing. The material of the partition wall 118' advantageously has a degree of translucency or “haze” of more than 30%. It then makes it possible to ensure the transmission of a fraction of the rays emitted by one of the lighting functions to the other lighting function.

[0053] Figure 5 illustrates a lighting module according to the first embodiment of the invention, such as in Figure 4, where however the separating partition 1 18”, in addition to being translucent or opalescent, is also absorbent. For this purpose, the material can be said to be “smoked”, that is to say containing in its mass dark particles capable of absorbing part of the light passing through it, in this case in the visible spectrum.

[0054] The absorbent property of a transparent or translucent material can be assessed and determined by the Beer-Lambert law, namely

[0055] [Math 1] where / 0(A) is the incident intensity on the material as a function of wavelength (neglecting Fresnel reflections), / (Â, ) is the emergent intensity of the material as a function of wavelength Å (neglecting Fresnel reflections), X is the thickness of the material (in mm), and a is the absorption coefficient of the material (in mm' 1 ).

[0056] For example, a transparent, uncolored material, such as PMMA, has an absorption coefficient of 0.03mm -1 >a>0.0001 mm -1 , while a transparent or translucent material called “smoked” has an absorption coefficient of 0.5mnr 1 >a>0.3mnr 1 .

[0057] The translucent or opalescent, absorbent material of the 118” partition wall has an absorption coefficient of 0.5 mm. -1 >a>0.3mm _1 .

[0058] The absorbent property of the transparent or translucent material of the partition wall is advantageous in that it limits the fraction of light rays passing from one function to another, while allowing sufficient passage to ensure a uniform lit appearance when only one function is active. The absorbent property of the transparent or translucent material also ensures a generally dark and matte unlit appearance.

[0059] With reference to Figure 5, one or more auxiliary light sources 120 may be provided opposite a light entry face 118”.4 of the partition wall 118”. The light emitted by this or these auxiliary light sources 120 enters the partition wall 118” and propagates longitudinally along the optical axis 114 by successive reflections at the diopters formed by the upper 118”.1 and lower 118”.2 faces with the ambient air, by the principle of total reflection. These rays then reach the light exit face 118”.3 and supply the part of the middle projection optical device at the junction of the upper 108.1.1 and lower 108.1.2 entry faces. This or these auxiliary light sources 120 are advantageously arranged on the common support 116, also serving as a heat sink for the light sources.More specifically, the first and second light sources 104 and 110 can be arranged on separate, parallel plates supported by the common support 116 extending along the optical axis 114. The auxiliary light source(s) 120 can then be arranged on a front face of the common support 116.

[0060] It is understood that what has just been described in relation to the auxiliary light source(s) applies to Figures 3 and 4 as well.

[0061] Figure 6 illustrates a lighting module according to a second embodiment of the invention. The reference numbers of the lighting module in Figures 3 to 5 are used to designate identical or corresponding elements, these numbers being increased by 100. Reference is also made to the description of these elements in relation to Figures 3 to 5. Specific reference numbers between 200 and 300 are used to designate the elements specific to this embodiment.

[0062] The lighting module 202 of the second embodiment differs from that of the first essentially in that the first and second light beams, instead of being emitted one above the other, are emitted side by side. For this, the collectors 206, 212 are juxtaposed in a transverse direction, and not superimposed in a vertical direction as in the first embodiment. The central separating partition 218.1 between the first and second collectors 206, 212 is made of transparent, translucent or opalescent and optionally absorbent material, similarly to the separating partitions 118, 118' and 118” of FIGS. 3, 4 and 5.

[0063] The lighting module comprises several first light sources 204 distributed transversely to the optical axis 214 of the optical projection device 208. The first collector 206 forms several reflective caps adjacent to each other and with their openings directed towards the corresponding light sources. The first light sources 204, the first collector 206 and the first projection lens 208a form the first light beam. The first light beam participates in the formation of a first lighting function, which is here an automotive lighting function without upper horizontal cutoff, commonly referred to as “supplementary road”, and which, added to a “low beam” function, makes it possible to form a function called “high beam” or “full beam”.This function is called matrix, because it forms a light beam divided into adjacent light zones that can be selectively activated, each light zone corresponding to one of the first light sources 204 and the corresponding reflective cap of the first collector 206. The first light sources 204 then illuminate downwards and the first collector 206 is located under the first light sources 204. The reflected light rays emitted by the first light sources 204 and reflected by the first collector 206 propagate towards the entrance face of the first projection lens 208a, forming the left entrance face 208.1.1 of the optical projection device 208.

[0064] The lighting module comprises several second light sources 210 distributed transversely to the optical axis 214 of the optical projection device 208, similarly to the first light sources 204. The second collector 212 forms several reflective caps adjacent to each other and with their opening directed towards the corresponding light source, similarly to the first collector 206. The second light sources 210, the second collector 212 and the second projection lens 208b form the second light beam. The second light beam participates in the formation of a second lighting function, which is here an automotive lighting function without upper horizontal cutoff. It can for example be a matrix “complementary road” function supplementing the lighting function provided by the first light sources 204 and the first collector 206.The reflected light rays emitted by the second light sources 210 and reflected by the second collector 212 propagate towards the entrance face of the second projection lens 208b, forming the right entrance face 208.1.2 of the optical projection device 208.

[0065] It should be noted that each of the first and second projection lenses 208a, 208b comprises a specific optical axis associated with the corresponding light sources, these two optical axes being preferably parallel. The optical axis 214 of the lighting module can be considered as a mean optical axis of the optical projection device 208 formed by the first and second projection lenses 208a, 208b.

[0066] The central separating partition 218.1, between the first and second light beams described above, is advantageously made of transparent, translucent or opalescent material and optionally absorbent, to allow a fraction of the light rays of the first and second light beams to reach the opposite entry face 208.1.1 or 208.1.2 of the optical projection device 208.

[0067] One or more auxiliary light sources 220.1 may be arranged opposite a light entry face of the central partition wall 218.1, similarly to the lighting module of FIG. 5.

[0068] The lighting module 204 also comprises transverse screens 222.1 and 222.2, arranged longitudinally between the optical projection device 208 and the first and second collectors 206 and 212. These transverse screens 222.1 and 222.2 are arranged so as to intercept and block certain parasitic reflected light rays likely to degrade the sharpness of certain luminous zones of the so-called matrix luminous image. At least one, in this case each, of the two transverse screens 222.1 and 222.2 is made of transparent, translucent or opalescent and optionally absorbent material, similarly to the partition walls 118, 118' and 118” of figures 3, 4 and 5, so as to provide illumination of the otherwise unlit parts of the corresponding entrance face 208.1.1 or 208.1.2.It can in fact be observed that each of the first and second collectors 206 and 212 is configured to converge the reflected light rays horizontally, and this towards a central part of the corresponding entry face 208.1.1 or 208.1.2 of the optical projection device 208. The transverse screens 222.1 and 222.2 made of transparent, translucent or opalescent material and optionally absorbent, make it possible to ensure illumination, even reduced, of the otherwise unlit parts of the corresponding entry face of the optical projection device 208.

[0069] The lighting module 202 may comprise, in addition to the central partition wall 218.1, lateral partition walls 218.2 and 218.3. These partition walls may also be made of transparent, translucent or opalescent and optionally absorbent material, similar to the partition walls 118, 118' and 118” of FIGS. 3, 4 and 5. This is useful in particular when one or more auxiliary light sources 220.2 and 220.3 are arranged opposite light entry faces of the lateral partition walls 218.2 and 218.3 in question. It should be noted that the lighting module 202 is not limited to the two functions described above and visible in FIG. 6.It is indeed possible to provide other functions arranged laterally to those visible in Figure 6, such as in particular a lighting function with a higher horizontal cutoff, more particularly a lighting function with a flat and horizontally extended upper horizontal cutoff (commonly referred to by the Anglo-Saxon term "fiat"), supplemented by a horizontally restricted lighting function with an upper cutoff with a projection (commonly referred to by the Anglo-Saxon term "kink"). For example, these additional functions can be arranged laterally directly to the right of the lateral separation partition 218.3, in which case, the fact that this separation partition is made of transparent, translucent or opalescent and optionally absorbent material makes it possible to pass a fraction of the light rays emitted by the adjacent lighting function towards the right entry face 208.1.2 of the optical projection device.It is understood that in the presence of additional lighting functions, the optical projection device extends further to these functions.

[0070] It can be seen in Figure 6 that the separating partitions 218.1, 218.2 and 218.3 can have a cross-section which varies along their extent, along the optical axis 214. In this case, the thickness of the separating partition decreases progressively from the rear to the front, that is to say along the main direction of propagation of the light rays.

[0071] Generally speaking, although the lighting modules according to the two embodiments described above comprise an optical projection device in the form of a juxtaposition of projection lenses, it should be noted that other forms of optical projection device are conceivable, such as in particular an optical projection device with a mirror, such as that illustrated in Figures 16 and 17 of the published patent application WO 2020 / 025171 A1.

Claims

CLAIMS [Claim 1.] Lighting module (102; 202), in particular for a motor vehicle, comprising: - at least one first light source (104; 204) capable of emitting first light rays; - a first collector (106; 206) with a first reflective surface configured to reflect the first light rays into first reflected light rays along a first main direction parallel to an optical axis (114; 214) of the lighting module; - at least one second light source (110; 210) capable of emitting second light rays; - a second collector (112; 212) adjacent to the first collector (106; 206) and with a second reflecting surface configured to reflect the second light rays into second reflected light rays along a second main direction parallel to the first main direction; - an optical projection device (108; 208), along the optical axis (114; 214), of the first and second reflected light rays, with a first entry face (108.1.1; 208.1.1) of the first reflected light rays and a second entry face (108.1.2; 208.1.2) of the second reflected light rays; - a separating partition (118, 118', 118”; 218.1) between the first reflected light rays and the second reflected light rays, extending between the optical projection device (108; 208) and the first and second collectors (106, 112; 206, 212); the separating partition (118, 118', 118”; 218.1) being made of a transparent or translucent material, in the visible spectrum, configured to transmit a fraction of the first reflected light rays towards the second input face (108.1.2; 208.1.2) and / or a fraction of the second reflected light rays towards the first input face (108.1.1; 208.1.1). [Claim 2.] The lighting module (102; 202) of claim 1, wherein the fraction of the first or second reflected light rays transmitted toward the second or first input face, respectively, is between 5 and 30% in luminous intensity of said first or second reflected light rays. [Claim 3.] Lighting module (102; 202) according to one of claims 1 and 2, in which the translucent material is opalescent. [Claim 4.] Lighting module (102; 202) according to one of claims 1 to 3, in which the translucent material has, in the visible spectrum, a translucency rate greater than or equal to 30% according to the ASTM D1003-21 test. [Claim 5.] Lighting module (102; 202) according to one of claims 1 to 4, in which the translucent material is absorbent in the visible spectrum and has, in said visible spectrum, an absorption coefficient a, where 0.5mm -1 >a>0.3mm _1 , following the Beer-Lambert law. [Claim 6.] Lighting module (102) according to one of claims 1 to 5, in which the separating partition (118, 118', 118”) has a light exit face (118.3, 118'.3, 118”.3) facing the optical projection device (108). [Claim 7.] Lighting module (102; 202) according to one of claims 1 to 6, further comprising: - at least one auxiliary light source (120; 220.1) arranged so as to illuminate at least one light entry face (118”.4) of the partition wall. [Claim 8.] Lighting module (102) according to claims 6 and 7, wherein the at least one light entry face (118”.4) of the partition wall (118”) is opposite the light exit face (118”.3) of said partition wall and transverse to the optical axis (114). [Claim 9.] Lighting module (102) according to one of claims 1 to 8, wherein the at least one first light source (104) and the at least one second light source (110) are arranged to illuminate in directions transverse to the optical axis (114) which are opposite, the at least one first light source (104) and the first collector (106) being arranged above the at least one second light source (110) and the second collector (212), when the lighting module (102) is in the normal mounting position. [Claim 10.] Lighting module (202) according to one of claims 1 to 8, wherein the at least one first light source (206) and the at least one second light source (210) are arranged so as to illuminate in main directions, respectively, which are transverse to the optical axis (214) and on either side, horizontally, of said optical axis (214), when the lighting module (202) is in the normal mounting position.

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