Luminous motor-vehicle module

Abstract

The present invention relates to a luminous module (1), comprising: - a first light source (2) configured to emit first light rays (4), - a second light source (3) configured to emit second light rays (5), - a collimator (6, 7) configured to form a first set (8) of light rays and / or a second set (9) of light rays, and - a microlens array (10), characterized in that the luminous module (1) comprises a deflecting device (15) configured to deflect the sets (8, 9) of light rays towards the microlens array (10), the deflecting device (15) comprising a plurality of deflecting members (16) comprising a first deflection area (17) and a second deflection area (18), each deflecting member (16) being offset with respect to the others in at least one direction.

Description

[0001] DESCRIPTION

[0002] Title of the invention: Light module for a motor vehicle

[0003] The present invention relates to the field of light modules equipping a motor vehicle, and it relates more particularly to a light module capable of generating at least two light functions which may be a lighting light function and / or a signaling light function.

[0004] Vehicles, and in particular motor vehicles, are commonly equipped with headlights to generate various lighting functions such as road lighting or signalling the vehicle to other road users, for example daytime running light functions or direction indicator light functions.

[0005] In some applications, light rays emitted by a light source are directed within a microlens array, also known by the acronym MLA for "microlens array", to shape a beam allowing the realization of a light function.

[0006] The matrix device comprises an array of input microlenses, an array of output microlenses and, where appropriate, a mask interposed between these arrays. The matrix device is configured to form light circulation channels between one of the input microlenses and one of the output microlenses, the optional mask comprising mask portions respectively arranged in one of the light circulation channels. Each mask portion is provided with at least one opening capable of allowing light rays to pass from the input microlens to the output microlens. The openings in the mask are configured to give a shape to the rays transmitted by the array of input lenses and to allow the array of output lenses to project this shape onto the road.

[0007] A possible improvement of such a light module is to adapt it so that it can generate two light functions simultaneously or alternately with each other. Such an adaptation must, however, meet certain conditions, such as maintaining the projection quality of the light beams linked to each of the light functions, in particular by allowing the projection of two homogeneous light functions, and this in a reduced spatial footprint, that is to say as much as possible with a common lighting surface for the two light functions.

[0008] The present invention falls within this context and proposes as such a light module for a motor vehicle, comprising: a first light source configured to emit first light rays in order to implement a first light function, a second light source configured to emit second light rays in order to implement a second light function, at least one collimator configured to form a first set of light rays parallel to each other from the first light rays and / or a second set of light rays parallel to each other from the second light rays, a microlens matrix device provided with an input microlens matrix,of an output microlens array and a plurality of light circulation channels arranged respectively between at least one input microlens and at least one output microlens in a direction defining an optical axis of the array device, the microlens array device comprising a first group of channels configured to project the first set of light rays into at least one first light beam, and a second group of channels configured to project the second set of light rays into at least one second light beam, remarkable in that the light module comprises at least one deflection device, towards which each of the sets of light rays at the collimator output are directed and which is configured to deflect the sets of light rays towards the microlens array device, the deflection device comprising a plurality of deflection members,at least one of said deflection members comprising a first deflection zone configured to deflect a portion, and preferably all, of the first set of light rays towards the first group of channels and a second deflection zone configured to deflect a portion, and preferably all, of the second set of light rays towards the second group of channels, each deflection member being offset relative to each other in at least one direction.,

[0009] Such a light module thus allows the implementation of two different light functions, for example a lighting function and a signaling function, while guaranteeing compactness and homogeneity of the light beams resulting from each light function, with the same lighting surface for each light function which corresponds to an output surface of a microlens matrix device.

[0010] Each light source may be a light-emitting diode or a set of light-emitting diodes, the diode(s) being configured to emit rays having an intensity and / or a color specific to the associated light function. These light sources are switched on or off depending on whether or not the associated light function is needed.

[0011] Once ignited, the light sources emit the light rays associated with them, namely the first light rays for the first light source and the second light rays for the second light source. The light rays propagate in all directions. The at least one collimator ensures the redirection of the first light rays and / or the second light rays so that the first light rays are parallel to each other and / or so that the second light rays are parallel to each other. This makes it possible to form the sets of light rays.

[0012] The wording “at least one collimator” should be understood to mean that the light module may comprise a single collimator, onto which the light rays from the first light source and the second light source are directed and which is configured to ensure the redirection of the first light rays and that of the second light rays, or two collimators, with a first collimator onto which the light rays from the first light source are directed and which is configured to ensure the redirection of the first light rays and a second collimator onto which the light rays from the second light source are directed and which is configured to ensure the redirection of the second light rays.

[0013] Regardless of the configuration of the light module according to the invention, with one or two collimators, the two sets of light rays are capable of being redirected towards the deflection device and its plurality of deflection members when the corresponding light source is activated. The sets of rays are subsequently directed by the deflection device towards the microlens matrix device. At least one of the deflection members deflects a portion of the first set of light rays via their first deflection zone and a portion of the second set of light rays via their second deflection zone. The set of deflection members allows the deflection of all the light rays towards the microlens matrix device.According to a particular embodiment of the invention, each of the deflection members deflects a portion of the first set of light rays via their first deflection zone and a portion of the second set of light rays via their second deflection zone, but it should be noted that certain deflection members, in particular those which are arranged on one of the edges of the deflection device, may deflect only a single set of light rays.

[0014] The matrix device ensures propagation of each set of light rays from the input microlens matrix to the output microlens matrix. The sets of light rays are therefore deflected opposite the matrix device in order to penetrate into it. The input matrix and the output matrix can be positioned relative to each other so that the image focus of the microlenses of the input matrix coincides with the object focus of the microlenses of the output matrix. In this case, the light beams formed at the output of the output matrix are intended to extend mainly in a direction parallel or substantially parallel to an optical axis of the matrix device, it being understood that prismatic effects can be additionally provided, in particular on the output face, to deflect the rays forming these light beams.

[0015] Alternatively, all or part of the microlenses of the input matrix can be configured so as to have an image focus which is in the vicinity of the microlenses of the output matrix, and more particularly outside the matrix device, it being understood that "in the vicinity" means a dimension less than 10% of the total longitudinal dimension of the matrix device between the matrix of input microlenses and the matrix of output microlenses.

[0016] The matrix device may include a mask interposed between the input matrix and the output matrix. The microlenses of the input matrix may be configured to converge light rays within the matrix device onto the area in which the mask is disposed. The mask extends across the path of the light rays and includes a plurality of apertures ensuring selection of the light rays. In other words, the light rays passing through the apertures continue their propagation to the output matrix while certain light rays are stopped and absorbed by an opaque portion of the mask. The mask may be positioned so as to coincide with the image focus of the microlenses forming the input matrix and with the object focus of the microlenses forming the output matrix.

[0017] The light module is thus kept efficient and compact while ensuring the realization of two light functions, capable of being selectively activated and having a common lighting surface formed by the output surface of the matrix device.

[0018] The channel groups are each formed by a plurality of light circulation channels respectively formed by at least one input microlens and one output microlens parallel to the optical axis.

[0019] First light circulation channels participating in forming the first group of channels are intended to generate a first light function, for example a lighting function. By way of non-limiting example, the lighting function associated with the first light beam at the output of the first group of channels may be a dipped beam type lighting function, or a high beam type lighting function, the light intensity emitted by the light sources being provided differently if one or other of the lighting functions is implemented. In the case of a dipped beam type lighting function, the previously mentioned mask may be provided within the matrix device, with a mask portion with appropriate shapes which is positioned in each first light circulation channel.

[0020] Second light circulation channels participating in forming the second group of channels are intended to generate a second light function, for example a signaling function. By way of non-limiting example, the signaling function associated with the second light beam at the output of the second group of channels may be a position light function, or a daytime running light function, also called DRL for “Daytime Running Lamp in English”, or a direction indicator light function, the light intensity and / or the color of the rays emitted by the light sources being provided differently depending on the signaling function implemented.

[0021] Of course, the light module according to the invention can be designed to implement two lighting functions or two signaling functions.

[0022] The channel groups are formed by light circulation channels which are spaced apart from each other, it being understood, however, that it may be provided that two adjacent light circulation channels form part of the same channel group. Advantageously, first light circulation channels, and the associated input microlenses, belonging to the first channel group are arranged alternately with second light circulation channels, and the associated input microlenses, belonging to the second channel group.

[0023] The shifting of the deflection members is implemented so that the first set of light rays is deflected towards the input microlenses associated with the first light circulation channels participating in forming the first group of channels and the second set of light rays is deflected towards the input microlenses associated with the second light circulation channels participating in forming the second group of channels.Furthermore, thanks to the offset between the deflection members, it is ensured that the first light rays, respectively the second light rays, can be directed over the entire dimension of the matrix device, with light circulation channels participating in forming the first group of channels, respectively the second group of channels, which extend homogeneously over the entire surface of the matrix device, so as to form a first light function, respectively a second light function, homogeneous, without however penalizing the realization of the other light function.

[0024] The light module may further comprise one or more of the following characteristics, taken alone or in combination.

[0025] According to a non-limiting characteristic of the invention, the at least one direction in which the deflection members are offset relative to each other is a transverse direction perpendicular to the direction of the optical axis.

[0026] According to a non-limiting characteristic of the invention, the deflection members are offset relative to each other in at least two dimensions, including a direction parallel to the direction of the optical axis of the matrix device and a first transverse direction perpendicular to the direction of this optical axis. Such an offset makes it possible, on the one hand, to prevent the deflection members from being able to capture and deflect light rays which are intended to impact other deflection members, so that the entire matrix device receives light rays and, on the other hand, to prevent the deflection members from preventing the propagation of light rays already redirected towards the matrix device by other deflection members.

[0027] According to a non-limiting characteristic of the invention, the deflection members extend parallel to the microlens matrix device.

[0028] According to a non-limiting characteristic of the invention, all of said deflection members each comprise a first deflection zone configured to deflect a portion, and preferably all, of the first set of light rays towards the first group of channels and a second deflection zone configured to deflect a portion, and preferably all, of the second set of light rays towards the second group of channels, with the possible exception of certain deflection members, located on the periphery of the deflection device, which may comprise only one deflection zone among the first deflection zone and the second deflection zone.These latter deflection members allow the adaptation of the deflection device to certain configurations of microlens matrix devices, for example when channels of the first group, or of the second group, are present at the same time on two opposite edges of said microlens matrix device.

[0029] According to a non-limiting characteristic of the invention, the first deflection zones of the deflection members have identical shapes.

[0030] According to a non-limiting characteristic of the invention, the second deflection zones of the deflection members have identical shapes.

[0031] According to a non-limiting characteristic of the invention, the first deflection zones of at least certain deflection members have different shapes from each other.

[0032] According to a non-limiting characteristic of the invention, the second deflection zones of at least certain deflection members have different shapes from each other.

[0033] Different shapes allow, for example, to have deflection zones adapted to the light circulation channels when these have different dimensions.

[0034] According to a non-limiting characteristic of the invention, the light module comprises a frame ensuring the mechanical maintenance of the reflective members. The deflection members are thus positioned on the path of the light rays and are mechanically maintained in a precise manner so that said light rays can be deflected towards the corresponding groups of channels.

[0035] According to a non-limiting characteristic of the invention, the deflection members are reflective members, each reflective member comprising a first reflective face and a second reflective face corresponding respectively to the first deflection zone and to the second deflection zone. The reflective faces are distributed into two groups, so as to be respectively positioned on a trajectory of one or the other of the sets of light rays and they are oriented so as to guide the sets of light rays towards the matrix device. The reflective faces act as mirrors and they are oriented at 45° relative to the direction of propagation of the light rays at the exit of the collimator to direct the rays substantially parallel to the optical axis towards the matrix device.More particularly, the first reflective faces are oriented so as to guide the first set of light rays towards the input microlenses of the matrix device which participate in forming the first group of channels and the second reflective faces are oriented so as to guide the second set of light rays towards the input microlenses of the matrix device which participate in forming the second group of channels.

[0036] According to a non-limiting characteristic of the invention, the deflection device is an optical block of transparent material, the deflection members being formed in the material of the optical block from a face of the optical block opposite the matrix device, the deflection members having a concave profile. This is another embodiment of the light module in which the deflection of the light rays takes place within a light guide formed by the optical block via diopters formed at the junction of this optical block and the ambient air surrounding the optical block, rather than by reflective panels. The block of transparent material is simpler to manufacture and assemble than a plurality of non-monoblock deflection members.The block of transparent material is configured to have two distinct input faces, respectively facing a collimator, and a common output face arranged facing the matrix device, the face of the block in which the deflection members are formed being arranged between the two input faces and being opposite the output face.

[0037] According to a non-limiting characteristic of the invention, the entry faces have flat portions through which the light rays coming from a collimator are able to penetrate into the optical block, one entry face being flat and the other entry face being stepped with a plurality of flat portions offset from each other.

[0038] According to a non-limiting characteristic of the invention, the deflection members are formed by prismatic assemblies respectively comprising a first inclined surface and a second inclined surface, the optical block comprising a plurality of first inclined surfaces facing the first set of light rays and a plurality of second inclined surfaces facing the second set of light rays, said inclined surfaces corresponding respectively to the first deflection zone and to the second deflection zone. The inclined surfaces are preferably inclined at 45° relative to the direction of propagation of the light rays within the optical block, both between an entry face and said inclined surface and between this inclined surface and the common exit face.

[0039] Advantageously, the refractive index of the material making up the block of material is greater than A / 2. This allows total reflection of the light rays reaching the inclined surfaces with an angle of incidence substantially equal to 45°. Generally speaking, the light rays propagating within the optical block only deviate from their trajectory upon contact with the inclined surfaces. For example, the material may be a transparent polymer.

[0040] According to a non-limiting characteristic of the invention, the first light source and the second light source are arranged on either side of the deflection device in said first transverse direction perpendicular to the direction of the optical axis. With a deflection device comprising a plurality of reflective surfaces or an optical block of transparent material within which prismatic elements with two reflective faces are formed, the sets of light rays, after having been processed by the collimator, are advantageously deflected by an angle of 90° towards the matrix device, between the entry into the deflection device and the exit from the deflection device.In order for each set of light rays to be specifically deflected to the corresponding channel group, the first set of light rays and the second set of light rays must propagate in opposite directions to each other so that a deflection towards the correct channel group is effected by the deflection device. The light sources are thus arranged on either side of the deflection device and emit the light rays mainly towards said deflection device.

[0041] According to a non-limiting characteristic of the invention, the light module comprises a first collimator configured to be arranged on a trajectory of the first light rays and to form the first set of light rays, and a second collimator configured to be arranged on a trajectory of the second light rays and to form the second set of light rays. The light sources being arranged opposite each other with respect to the deflection device, a collimator is associated with each of them to form the first set of light rays on the one hand and the second set of light rays on the other hand. Thus the first set of light rays and the second set of light rays all propagate towards the deflection device while being parallel to each other.

[0042] According to a non-limiting characteristic of the invention, the deflection device is a segmented lens comprising a plurality of segments corresponding to the deflection members, each segment comprising an input surface, a first output surface corresponding to the first deflection zone and a second output surface corresponding to the second deflection zone. Thus, and according to a third embodiment of the light module according to the invention, the sets of light rays are deflected and shaped by a lens instead of being reflected by a reflective surface. The segmented lens makes it possible to converge the first light rays towards the first output surface and the second light rays towards the second output surface, each of the output surfaces being opposite the corresponding group of channels.Thus, the first light rays exit the segmented lens parallel to each other via one of the first exit surfaces in order to directly join an entrance microlens forming part of the first group of channels, while the second light rays exit the segmented lens parallel to each other via one of the second exit surfaces in order to directly join an entrance microlens of the second group of channels.

[0043] According to a non-limiting characteristic of the invention, the input surface is configured to converge a portion of the first set of light rays towards the first output surface and a portion of the second set of light rays towards the second output surface. The input surface has a complex surface capable of deflecting the light rays which pass through it and configured to deflect the first light rays towards the first output surface and to deflect the second light rays, which arrive on this input surface with an angle of incidence distinct from that with which the first light rays arrive, towards the second output surface.In other words, the complex profile of the input surface is such that light rays arriving with a first angle of incidence are converged towards a focus of the first output surface and light rays arriving with a second angle of incidence are converged towards a focus of the second output surface, each of the output lenses comprising the first output surface or the second output surface being divergent.

[0044] According to a non-limiting characteristic of the invention, the first light source and the second light source are arranged on the same side of the deflection device in the vicinity of the optical axis of the matrix device. These two light sources are oriented to emit the light rays mainly in the same direction, and at least one of them has an offset relative to the optical axis, so that the rays emitted by one and the other arrive at the segmented lens with a variable angle of incidence. This third embodiment is advantageous in terms of compactness compared to the first embodiment or the second embodiment, because it is not necessary here to arrange the light sources on either side of the deflection device. These can be arranged in the vicinity of one another and facing the segmented lens.More precisely, the light sources can be positioned on either side of the optical axis of the matrix device.

[0045] According to a non-limiting characteristic of the invention, the light module comprises a collimator common to the two light sources and arranged between said light sources and the segmented lens. Due to the fact that the light sources are in the vicinity of each other, it is not necessary to integrate two collimators unlike in the first or second embodiment. The collimator is common to the two light sources and is interposed between the light sources and the segmented lens. In addition, the collimator is configured to orient the first light rays parallel to each other and in a first direction of propagation and the second light rays parallel to each other and in a second direction of propagation different from the first direction of propagation.Due to the propagation directions, the first set of light rays and the second set of light rays reach the entrance surface of one of the segments of the segmented lens at a specific angle of incidence. This angle of incidence allows the specific convergence of the first light rays towards the first exit surface and the second light rays towards the second exit surface via the entrance surface.

[0046] Other characteristics and advantages of the invention will become apparent from the following description on the one hand, and from several examples of embodiment given for informational and non-limiting purposes with reference to the attached schematic drawings on the other hand, in which:

[0047] [fig 1] schematically represents a first embodiment of a light module according to the invention seen from the side,

[0048] [fig 2] schematically represents the first embodiment of the light module seen from the front,

[0049] [fig 3] schematically represents a second embodiment of the light module according to the invention,

[0050] [fig 4] schematically represents a third embodiment of the light module according to the invention.

[0051] Figure 1 is a schematic representation of a light module 1 according to the invention. The light module 1 can be integrated within a motor vehicle for the purpose of performing at least two different light functions, which can be a lighting function or a signaling function.

[0052] To do this, the lighting module comprises at least one first light source 2 and at least one second light source 3, each of the light sources 2, 3 emitting light rays intended to ensure the lighting function specific to them. The light sources 2, 3 may for example be light-emitting diodes and each light source 2, 3 has an intensity and / or a color specific to it in order to ensure the lighting function assigned to it, and this in a regulatory manner.

[0053] As a result, the first light source 2 emits a multitude of first light rays 4 while the second light source 3 emits a multitude of second light rays 5. In order to clarify Figure 1 and the following figures, the first light rays 4 will be represented in solid lines while the second light rays 5 will be represented in dotted lines. The light rays 4, 5 propagate in all directions and some of them are shown schematically in Figure 1.

[0054] The light module 1 further comprises a first collimator 6 and a second collimator 7 respectively positioned in the vicinity of the first light source 2 and the second light source 3. The first collimator 6 deflects all or part of the first light rays 4 in order to form a first set 8 of light rays parallel to each other. Similarly, the second collimator 7 deflects all or part of the second light rays 5 in order to form a second set 9 of light rays parallel to each other.

[0055] As illustrated in Figure 1, the collimators 6, 7 may be in the form of a parabolic element with a reflective inner wall, each light source 2, 3 being arranged within said parabolic element. It should be noted that Figure 1 schematically represents the shape of the collimators and the positioning of the light sources relative to the associated collimator. In practice, the light sources may be arranged at a focal distance from the collimator and oriented relative to this collimator so that more or less of the emitted light rays are correctly processed by the collimator.

[0056] According to the first embodiment, the light rays 4, 5 from each light source 2, 3 are deflected by a collimator 6, 7 which is specific to it.

[0057] The light module 1 also comprises a microlens matrix device 10. The microlens matrix device 10 is not illustrated here in detail, but in a manner not shown, it comprises an input microlens matrix at which the sets 8, 9 of light rays enter and an output microlens matrix from which the light rays exit so as to form a lighting or signaling beam, each of the matrices comprising a plurality of microlenses. The focal lengths of each input and output microlens are configured to generate light circulation channels formed by at least one input microlens and at least one output microlens.The microlens array device 10 is configured to form a first channel group 11 and a second channel group 12, respectively formed by a plurality of first light circulation channels and a plurality of second light circulation channels. The first channel group 11 and the second channel group 12 are configured to respectively convert the first set 8 of light rays into a first light beam 13, and the second set 9 of light rays into a second light beam 14. It is the first light beam 13 and the second light beam 14 which propagate out of the light module 1 in order to respectively operate the first light function and the second light function.Thus, the two lighting functions are implemented simultaneously or alternately with respect to each other, depending on which group of channels 11, 12 is selectively illuminated, and this from a single light module 1.

[0058] Just as for the light rays 4, 5, the light circulation channels and the microlenses participating in forming the first group of channels 11 are represented in solid lines while the light circulation channels and the microlenses participating in forming the second group of channels 12 are represented in dotted lines. According to the configuration illustrated in FIG. 1, the matrix device 10 is organized so as to form an alternation between light circulation channels dedicated to the first group of channels 11 and light circulation channels dedicated to the second group of channels 12.

[0059] The light beams 13, 14 formed at the output of the matrix device extend mainly in a direction parallel or substantially parallel to an optical axis Ax of the matrix device 10. The input matrix and the output matrix are configured so that the light propagates within the light circulation channels with appropriate focusing characteristics.

[0060] According to a first exemplary embodiment, the input microlenses and the output microlenses can be configured and positioned relative to each other so that the image focus of a microlens of the input matrix associated with a light circulation channel coincides with the object focus of a microlens of the output matrix associated with this same light circulation channel. In this example, almost all of the rays entering a light circulation channel exit the same channel to participate in the formation of the first or second light beam. According to a second exemplary embodiment, the matrix device 10 can comprise a mask interposed between the input matrix and the output matrix.The microlenses of the input matrix can be configured to converge light rays within the matrix device 10 onto the area in which the mask is arranged and the microlenses of the output matrix can be configured to image the opening made in the mask and through which some of the light rays continue to propagate within the dedicated light circulation channel. The mask thus comprises a plurality of openings ensuring a selection of the light rays passing through the matrix device 10 and a specific shape of the light beam projected at the output of the matrix device 10.

[0061] In order to implement a compact light module and to combine two light functions, the light module 1 comprises a deflection device 15 ensuring the deflection of the sets 8, 9 of light rays towards the matrix device 10 and more particularly towards the group of channels 11, 12 associated with it. The deflection device 15 is here in particular configured to straighten light rays from a first transverse direction DTI perpendicular to the optical axis Ax of the matrix device, here the vertical direction, towards the longitudinal direction of the optical axis Ax of the matrix device. The sets 8, 9 of light rays, once made parallel to each other via the collimators 6, 7 propagate in the first transverse direction DTI towards the deflection device 15 which deflects them substantially at 90° in the longitudinal direction of the optical axis Ax.More precisely, the deflection device 15 makes it possible to deflect the first set 8 of light rays towards the first group of channels 11 and to deflect the second set 9 of light rays towards the second group of channels 12.

[0062] To do this, the deflection device 15 comprises a plurality of deflection members 16, and each of these deflection members 16 comprises a first deflection zone 17 and a second deflection zone 18. According to the first embodiment, the deflection device 15 is a reflective device 19 comprising a plurality of reflective members 20 acting as deflection members 16, and each of these reflective members 20 comprises a first reflective face 21 and a second reflective face 22, respectively acting as a first deflection zone 17 and a second deflection zone 18. As illustrated in FIG. 1, the reflective members 20 each have, in a section plane comprising the longitudinal direction of the optical axis Ax and the first transverse direction DTI, here vertical, a triangular section.

[0063] The first reflecting faces 21 and the second reflecting faces 22 are respectively arranged opposite the first collimator 6 and the second collimator 7, so that these reflecting faces are respectively reached by the first set of light rays 8 and by the second set of light rays 9. Advantageously and as illustrated in FIG. 1, the reflecting faces 21, 22 are oriented at an angle of 45° relative to the trajectory of the sets 8, 9 of light rays in order to reflect them at an angle of approximately 90°. In addition, each reflecting face 21, 22 is also opposite an input matrix of the first group of channels 11 or the second group of channels 12 so that the first set 8 of light rays is reflected towards the first group of channels 11 and the second set 9 of light rays is reflected towards the second group of channels 12.More particularly, each first reflecting face faces an input microlens that is part of the first group of channels 11, and each second reflecting face faces an input microlens that is part of the second group of channels 12. By "facing", it is understood that the projection of the reflecting face onto the matrix device in the direction of the optical axis corresponds substantially to the surface of the corresponding input microlens. If such a projection of a reflecting face specifically overlaps an input microlens associated with the first matrix device, respectively second matrix device, it is because this reflecting face faces an input matrix of the first group of channels, respectively of the second group of channels.

[0064] This characteristic results in a distribution over the entire matrix device of the light rays specific to two distinct light functions, with sets of light rays distributed over a first group of channels and a second group of channels. Thus, the two light functions are operational thanks to the deflection device 15 ensuring an efficient and homogeneous orientation of the light rays towards the matrix device 10. In particular, the two light functions can be carried out selectively from one another, by appropriate switching on and off of each of the light sources.

[0065] The deflection device makes it possible to achieve this dual lighting function on the same matrix device with a particular configuration of the light sources and the deflection devices.

[0066] In the first embodiment, the first light source 2 and the second light source 3 are arranged on either side of the deflection device 15, in the first transverse direction DTI, perpendicular to the optical axis direction Ax of the light module and the matrix device. The first set 8 and the second set 9 of light rays then both propagate, in opposite directions of propagation, towards the deflection device 15 which deflects them both towards the matrix device 10 in the same direction and the same direction of propagation.

[0067] As can be seen in Figure 1, the deflection members 16, here the reflecting members 20, have a specific configuration, being offset relative to each other, in two dimensions, to thus allow an arrangement of the plurality of first reflecting faces 21 facing the entirety of the first set 8 of light rays, and of the plurality of second reflecting faces 22 facing the entirety of the second set 9 of light rays.

[0068] More particularly, the deflection members 16 are offset from each other relative to the longitudinal direction of the optical axis Ax of the matrix device, with the deflection members all having a distance from the matrix device which is variable from one deflection member to another.

[0069] The deflection members 16 are also offset relative to each other with respect to the first transverse direction DTI perpendicular to the optical axis Ax, here the vertical direction, which corresponds to the direction of propagation of the light rays between the collimator and the deflection device. The offset of the deflection members relative to each other along these two dimensions is continuous so that the deflection members are offset successively, step by step, in the same direction. As one approaches the matrix device along the optical axis Ax, the deflection members approach one of the collimators.

[0070] This offsetting of the reflecting members 20 in two dimensions and continuously, that is to say in the same offsetting direction, makes it possible, as mentioned, to distribute the light rays well over the entire matrix of input microlenses, and it also makes it possible to prevent reflecting members from ending up on the path of light rays 4, 5 intended to be deflected by other reflecting members 20, or on the path of light rays already deflected by other reflecting members.

[0071] A single deflection device 15 is therefore sufficient to implement the light module 1 with two distinct light functions, which improves the compactness of said light module 1 compared to a configuration implementing a deflection device for one light function.

[0072] Figure 2 is a representation of the first embodiment of the light module 1 seen from a different angle than that illustrated in Figure 1. Figure 2 makes it possible to illustrate additional structural specificities linked to the first embodiment of the light module 1.

[0073] In Figure 2, the matrix device 10 is shown in the background while the deflection device 15, here the reflective device 19, is shown in the foreground, the view being taken along the longitudinal axis. It is thus possible to observe that the reflective members 20 forming the reflective device extend parallel to each other, in a second transverse direction DT2 perpendicular to the longitudinal direction of the optical axis Ax of the matrix device 10 and perpendicular to the first transverse direction DTI, that is to say the direction of propagation of the light rays leaving the collimator. More particularly, the reflective members have the form of bands extending over the entire dimension of the matrix device along this second transverse direction DT2.This allows, in combination with the shape of the collimator allowing light rays to be directed over this entire transverse dimension of the reflective members, to be able to generate a first light beam and / or a second light beam at the output of the matrix device which is homogeneous over this entire second transverse dimension.

[0074] It is understood from the above and from figures 1 and 2 that the reflecting members 20 have in this embodiment a triangular prism shape with the bases arranged at each of the ends in the second transverse direction DT2 and with a sharp edge 200 forming the part of the prism closest to the matrix device 10.

[0075] The reflecting device 19 thus comprises a plurality of prisms arranged parallel to each other, with an offset from one prism to another in the longitudinal direction of the optical axis Ax and in the first transverse direction DTI. It should be noted that the offset of the triangular prisms relative to each other is an integral offset, insofar as the projection of a triangular prism in the longitudinal direction of the optical axis Ax or in the first transverse direction DTI does not encounter other prisms.

[0076] In order to ensure the position of the reflective members opposite the matrix device, the light module 1 here comprises a frame 23 ensuring the mechanical maintenance of the reflective members 20. Indeed, these must be arranged extremely precisely so that the sets of light rays are deflected correctly and by the correct reflective members 20 so as to be correctly oriented towards the correct input matrices of the matrix device 10. The reflective members are fixed to the frame 23 at their transverse ends, here the bases of the prisms. The frame 23 can also be mechanically linked to the first collimator 6 and to the second collimator 7.

[0077] Figure 3 is a schematic representation of a second embodiment of the light module 1 according to the invention. This second embodiment differs from the first embodiment only by the nature of the deflection device 15.

[0078] According to the second embodiment, the deflection device 15 is an optical block 24 of transparent material which forms a light guide, in place and places reflective members of the first embodiment. Such an optical block 24 has faces of complex shapes to generate diopters, at the junction between the optical block 24 and the ambient air, which are distributed so that the optical block 24 can propagate within it the light rays which travel through it, and ensure that each of these light rays traveling through it meets a diopter allowing its reflection in the direction of an exit face of the optical block arranged opposite the matrix device.

[0079] The optical block 24 may for example be made of transparent polymer having a refractive index greater than A / 2. Such a refractive index makes it possible to implement total reflection of the light rays at a diopter between the optical block 24 and the ambient air, when the light rays encounter the optical block 24 with an angle of incidence of 45°.

[0080] In the case of an angle of incidence of 0°, that is to say in the case where one of the light rays 4, 5 reaches the diopter between the optical block 24 and the ambient air while being perpendicular or substantially perpendicular to the surface of said block of material, then the light ray passes through the surface without being reflected or deviated from its trajectory.

[0081] The optical unit 24 is configured so that all light rays coming from a collimator encounter the optical unit with a substantially zero angle of incidence, so that all rays can penetrate the diopter, and all light rays propagating in the optical unit encounter a diopter arranged to allow total reflection. This ensures the high luminous efficiency of the light module equipped with this deflection device.

[0082] The deflection members 16 are formed by the diopters arranged to allow total reflection, and they are all integrated into the optical block 24, forming a single-piece assembly, which is advantageous in the sense that it is not necessary to manufacture several entities to shape the deflection device 15.

[0083] More particularly, the optical block 24 has a first ray entry face 241 which is arranged opposite the first collimator, a second ray entry face 242 which is arranged opposite the second collimator and an exit face 243 which is opposite the matrix device 10. One of the entry faces, here the first entry face 241, is substantially planar and extends continuously over the entire longitudinal dimension of the optical block 24. The other entry face, here the second entry face 242, is stepped, with planar portions 242a, 242b, 242c which are increasingly distant from the opposite entry face, here the first entry face, as one approaches the exit face 243.

[0084] The optical block 24 comprises a plurality of first inclined surfaces 25 corresponding to the first deflection zone 17, and a plurality of second inclined surfaces 26 corresponding to the second deflection zone 18. The first inclined surfaces 25 are turned towards the first input face 241 and are furthermore arranged opposite the first group of channels 11 of the matrix device 10 in order to reflect a portion of the first set 8 of light rays towards said first group of channels 11. In the same way, the second inclined surfaces 26 are arranged facing the second input face 242 and are furthermore arranged opposite the second group of channels 12 of the matrix device 10 in order to reflect a portion of the second set 9 of light rays towards said second group of channels 12.In this, the first inclined surfaces 25 and second inclined surfaces 26 respectively have the same arrangement as the first reflective faces 21 and second reflective faces 22 of the first embodiment.

[0085] Prismatic elements, respectively formed by a first inclined surface 25 and a second inclined surface 26, are produced by a release of material within the optical block on the face which is opposite the output surface.

[0086] Each prismatic assembly thus formed is associated with a planar portion of the stepped entry face, here the second entry face 242. Considering the first transverse direction DTI, that is to say the direction perpendicular to the two entry faces, the projection of a prismatic assembly and the projection of the associated planar portion of the stepped entry face are substantially the same, and they do not interfere with the projections of other prismatic assemblies or planar portions.

[0087] In accordance with what has been described for the deflection members of the first embodiment, these prismatic elements, respectively formed by a first inclined surface 25 and a second inclined surface 26, extend over a dimension along the second transverse direction DT2 which is substantially equal to the corresponding dimension of the matrix device.

[0088] This results, as visible in Figure 3, in the following ray tracings. Before being reflected by the inclined surfaces 25, 26, the sets 8, 9 of light rays penetrate into the material of the optical block 24 through one or other of the entry faces 241, 242, perpendicular to the surface crossed and are therefore not deflected. It is notable that for the rays arriving from the side of the stepped entry face, the prismatic elements are respectively covered by one of the flat portions 242a, 242b, 242c of the entry face, so that the set of corresponding light rays encounters the stepped entry face with a zero angle of incidence. Each ray propagating within the optical block therefore propagates mainly along the first transverse direction DTI, so that it is caused to encounter one of the inclined surfaces.The rays of the first set 8 of light rays all encounter first inclined surfaces 25 and are totally reflected, at 90°, to be directed towards a portion of the exit face 243 opposite the first group of channels 11 and the rays of the second set 9 of light rays all encounter second inclined surfaces 26 and are totally reflected, at 90°, to be directed towards a portion of the exit face 243 opposite the second group of channels 12. Just as for the entry into the material of the optical block 24, the passage of the light rays through the exit face 243 is at a zero angle of incidence so that the rays are not deflected when passing through the diopter formed by the exit face 243.

[0089] Without this being limiting of the invention, the output face 243 may be equipped with optical elements. These optical elements, for example taking the form of pads having a diffusing effect on the beam of rays, may be arranged in strips selectively facing the first deflection zones or the second deflection zones, in particular to give a diffusing effect to the light rays when these are dedicated to generating a signaling function. It should however be noted that these optical elements must be more or less convergent in order to ensure that optical elements arranged facing a deflection zone dedicated to a light function do not participate in sending light rays onto a group of channels dedicated to the other light function.The rest of the structural and functional elements being identical to what was described concerning the first embodiment, reference will be made to the description of figure 1 concerning the elements common to the two embodiments.

[0090] Figure 4 represents a third embodiment of the light module 1 according to the invention. As for the previous embodiments, the light module 1 comprises two light sources 2, 3 each participating in the implementation of a light function different from one another and emitting light rays 4, 5. The light module also comprises at least one collimator as well as a deflection device 15 allowing the deflection of the sets 8, 9 of light rays towards the groups of channels 11, 12 of the matrix device 10 in order to generate the light beams 13, 14.

[0091] One of the particularities of the third embodiment of the light module 1 is that the deflection device 15 is a segmented lens 27 centered on the optical axis Ax. Such a configuration makes it possible on the one hand to position the light sources 2, 3 axially, along the optical axis, instead of positioning them on either side of the deflection device 15 in a transverse direction as is the case for the embodiments previously described. The third embodiment therefore makes it possible to limit the spatial size of the light module 1 in a transverse direction perpendicular to the optical axis Ax of the matrix device compared to the first and second embodiments.

[0092] More particularly, the first light source 2 and the second light source 3 are positioned on either side of the optical axis 28.

[0093] On the other hand, such a configuration makes it possible to use a common collimator 29 for the two light sources 2, 3. The common collimator 29 is thus interposed between the light sources 2, 3 and the segmented lens 27.

[0094] The common collimator 29 makes it possible to deflect the first light rays 4 into the first set 8 of light rays and the second light rays 5 into the second set 9 of light rays. The first set 8 of light rays consists of the first light rays 4 parallel to each other at the output of the collimator 29 and has a first direction of propagation, different from a second direction of propagation applied to the second set 9 of light rays which consists of the second light rays 5 parallel to each other at the output of the collimator 29.

[0095] The positioning of the light sources on either side of the optical axis Ax on which the common collimator is centered makes it possible to manage two sets of light rays 8, 9 with distinct orientation at the output, depending on whether the first light source or the second light source is activated.

[0096] The segmented lens 27 comprises a plurality of segments 30 which correspond to the deflection members 16. Each segment 30 comprises an entry surface 31, a first exit surface 32 and a second exit surface 33. The entry surface 31 is configured to, on the one hand, direct towards the first exit surface 32 the light rays meeting the segment 30 with a first angle, here the first set of light rays 8, so as to form the first deflection zone 17 within the meaning of the invention, and on the other hand, direct towards the second exit surface 33 the light rays meeting the segment 30 with a second angle, here the second set of light rays 9, so as to form the second deflection zone 18 within the meaning of the invention.

[0097] Just as previously, each first outlet surface 32 of a segment participating in forming a first deflection zone 17 is arranged opposite the first group of channels 11 while each second outlet surface 33 of a segment participating in forming a second deflection zone 18 is arranged opposite the second group of channels 12.

[0098] The input surfaces 31 and the output surfaces 32, 33 are schematically illustrated in Figure 4. In order to perform the function previously described, the input surface 31 has a complex shape intended to converge on the focus of one or other of the output surfaces 32, 33 the rays entering the corresponding segment 30 according to their angle of incidence at the entrance into the segment. These output surfaces are configured so that their respective focus is arranged between the segmented lens 27 and the matrix device 10, thus forming diverging lenses, so that the rays arriving at an output surface are directed parallel to the optical axis, towards the group of channels directly opposite this output surface.The first light beam 13 and the second light beam 14 can thus subsequently be formed respectively by the first group of channels 11 and by the second group of channels 12 in order to implement one and / or the other of the light functions associated with the light module 1. The invention, as just described, achieves the aim it set for itself, and makes it possible to propose a light module capable of providing two light functions while retaining efficiency and compactness. Variants not described here could be implemented without departing from the context of the invention, provided that, in accordance with the invention, they comprise a light module in accordance with the invention.

Claims

CLAIMS 1- Light module (1) for a motor vehicle, comprising: a first light source (2) configured to emit first light rays (4) in order to implement a first light function, a second light source (3) configured to emit second light rays (5) in order to implement a second light function, at least one collimator (6, 7, 29) configured to form a first set (8) of light rays parallel to each other from the first light rays (4) and / or a second set (9) of light rays parallel to each other from the second light rays (5), a matrix device (10) of microlenses provided with a matrix of input microlenses, a matrix of output microlenses and a plurality of light circulation channels arranged between at least one input microlens and at least one output microlens in a direction defining an optical axis (Ax) of the matrix device (10),the microlens matrix device (10) comprising a first group of channels (11) configured to project the first set (8) of light rays into at least one first light beam (13), and a second group of channels (12) configured to project the second set (9) of light rays into at least one second light beam (14), characterized in that the light module (1) comprises at least one deflection device (15), towards which each of the sets of light rays at the collimator outlet are directed and which is configured to deflect the sets (8, 9) of light rays towards the microlens matrix device (10), the deflection device (15) comprising a plurality of deflection members (16),at least one of said deflection members (16) comprising a first deflection zone (17) configured to deflect a portion of the first set (8) of light rays towards the first group of channels (11) and a second deflection zone (18) configured to deflect a portion of the second set (9) of light rays towards the second group of channels (12), each deflection member (16) being offset relative to each other in at least one direction., 2- Light module (1) according to claim 1, in which the deflection members (16) are offset relative to each other by at least two dimensions including a direction parallel to the direction of the optical axis (Ax) of the matrix device and a first transverse direction (DTI) perpendicular to the direction of this optical axis (Ax). 3- Light module (1) according to one of claims 1 to 3, in which the deflection members (16) are reflective members (20), each reflective member (20) comprising a first reflective face (21) and a second reflective face (22) corresponding respectively to the first deflection zone (17) and to the second deflection zone (18). 4- Light module (1) according to one of claims 1 to 3, in which the deflection device (15) is an optical block (24) of transparent material, the deflection members (16) being in the material of the optical block from a face of the optical block opposite the matrix device (10), the deflection members having a concave profile. 5- Light module (1) according to the preceding claim, in which the deflection members (16) are formed by prismatic assemblies respectively comprising a first inclined surface (25) and a second inclined surface (26), the optical block (24) comprising a plurality of first inclined surfaces (25) facing the first set (8) of light rays and a plurality of second inclined surfaces (26) facing the second set (9) of light rays, said inclined surfaces (25, 26) corresponding respectively to the first deflection zone (17) and to the second deflection zone (18). 6- Light module (1) according to any one of claims 2 to 6, in which the first light source (2) and the second light source (3) are arranged on either side of the deflection device (15) in said first transverse direction (DTI) perpendicular to the optical axis direction (Ax). 7- Light module (1) according to the preceding claim, comprising a first collimator (6) configured to be arranged on a trajectory of the first light rays (4) and to form the first set (8) of light rays, and a second collimator (7) configured to be arranged on a trajectory of the second light rays (5) and to form the second set (9) of light rays. 8- Light module (1) according to claim 1, wherein the deflection device (15) is a segmented lens (27) comprising a plurality of segments (30) corresponding to the deflection members (16), each segment (30) comprising an input surface (31), a first output surface (32) participating in forming the first deflection zone (17) and a second output surface (33) participating in forming the second deflection zone (18). 9- Light module (1) according to the preceding claim, wherein the input surface (31) is configured to converge a portion of the first set (8) of light rays towards the first output surface (32) and a portion of the second set (9) of light rays towards the second output surface (33). 10- Light module (1) according to claim 9 or 10, wherein the first light source (2) and the second light source (3) are arranged on the same side of the deflection device (15) in the vicinity of the optical axis (Ax) of the matrix device (10). 11- Light module (1) according to the preceding claim, comprising a common collimator (29) for the two light sources (2, 3) and arranged between said light sources (2, 3) and the segmented lens (27).

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