EP3537040A1 - Luminous module and luminous device for motor vehicle comprising such a luminous module - Google Patents

Abstract

A luminous device comprises at least one light module (1), the light module (1) comprising at least one light source (2), a support (3) of the light source (2), and an optical element (4) capable of to receive rays emitted by the light source (2) .According to the invention, the optical element (4) comprises positioning means (463) of this optical element (4) on the support (3) in a predetermined position and elastic fixing means (46) of this optical element (4) in the predetermined position.

Description

The field of the present invention is that of the light modules for a motor vehicle, and in particular the lighting and / or signaling modules.

A motor vehicle is equipped with headlamps, or headlights, intended to illuminate the road in front of the vehicle, especially at night or in bad weather. These headlamps can generally be used in two lighting modes: a first mode "high beam" and a second mode "low beam". The "high beam" mode provides strong illumination of the road far ahead of the vehicle, with the risk of dazzling oncoming road users. The "low beam" mode provides more limited road lighting, but still offers good visibility without dazzling other road users. These two lighting modes are complementary.

In each of these modes of operation, in order to avoid dazzling oncoming road users, it is necessary to master the positioning and orientation of each of the projectors, and more particularly of each of the components of these components. projectors.

The projectors may comprise one or more light modules comprising a light source, an optical deflection element, a projection optics, each of these elements being mounted on a support. Each element of the module is fixed to the support by at least one fixing element, the support being itself fixed to the vehicle.

The elements usually constituting these light modules are generally bulky and complicated to assemble and parameterize so as to obtain light rays that meet the photometric standards.

The document DE102008055936 discloses a light device according to the preamble of claim 1.

In this context, the present invention aims to propose a module illuminated whose mounting and adjustment are simplified.

A light device for a motor vehicle according to the invention comprises at least at least one light module, the light module comprising at least one light source, a light source support and an optical element able to receive rays emitted by the light source, the optical element comprising means for positioning this optical element on the support in a predetermined position and elastic fixing means for this optical element on the support in the predetermined position. The light device comprises a plate on which are arranged the at least one light module and a projection lens, the projection lens forming a secondary optics while the optical element or elements associated with the light module form primary optics.

The predetermined position is understood as the desired theoretical position of the optical element with respect to the position of the light source (s).

The positioning means make it possible to ensure the correct position of the optical element before it is fixed on the support of the light source. And according to the invention, the assembly of a light module is facilitated by the integration of positioning means and elastic fixing means in the optical element, thus reducing the number of assembly steps or the risk of Thu.

The light source support is arranged to receive at least one printed circuit board and / or an electronic component, or to directly form the printed circuit board on which light sources and electronic components are mounted. By way of non-limiting example, the support may consist of a flat wall against which is plated a printed circuit board, the light source being fixed on this card.

The optical element is arranged against the support. It can in particular be plated on the support, that is to say that one of the surfaces of the optical element, particularly the projecting face of which the resilient fixing means extend, is in contact with one of the faces of the support.

The optical element may further comprise at least one arrangement for receiving an electronic component disposed on the support. This arrangement may for example comprise a window formed in the volume of the optical element, or a specific convex shape of the optical element forming clearance with respect to the support.

The optical element may comprise at least one arrangement in the form of a recess for passing air towards the support, to allow the cooling of one or more components, in particular electronic components, of the light module, and for example the sources bright. The arrangement can in particular consist of one or more windows passing through the optical element.

The positioning means of the optical element may comprise male elements, respectively female, configured to cooperate with female elements, respectively male, carried by the support of the light source. By way of nonlimiting example, it may be provided that the positioning means carried by the optical element take the form of one or more pins complementary (s) of one or more bores made in the support. In particular, the bore may take the form of an oblong hole. In a particular embodiment, one of the half-moons at the end of the oblong hole is wider than the half-moon at the other end of the oblong hole. It can then be provided that the pin cooperating with this oblong hole has a corresponding shape, the combination of the two forms between them acting as a key. In another alternative, the pin of the positioning means of the optical element is dimensioned so as to be able to enter the bore on the side of the larger half-moon and then to be put in place and retained on the half-moon side. the narrowest moon.

According to one characteristic of the invention, provision may be made for the means for positioning the optical element to comprise at least one amount of elastic fixing means and for positioning means. complementary comprise at least one bearing surface formed by an edge of the support, the amount resting on the bearing surface to bring the optical element in the predetermined position.

The resilient fixing means comprise at least one elastic blade, carried in particular by a segment or a frame projecting from the optical element, configured to cooperate with the rim of a plate, the elastic blades being deformed at the passage of the optical element along this rim to resume their original position and snap back of this rim when the optical element is in the predetermined position.

By snapping it is understood that during the placement of the optical element on the support, the elastic blades will deform elastically in contact with the plate to resume their original shape behind it, the edge of the plate then forming a stop against the release of the elastic blades. The blades have for this purpose a shape suitable for being deformed elastically in one direction of passage and to be blocked in the other direction, and for example an inclined plane and a stop at the free end of this inclined plane. Once the optical element in place, the elastic blades are no longer compressed by the edges of the support and they resume their original shape, which brings them in contact at the face of the plate facing the opposite of the optical element.

The elastic fixing means and the support are configured to cooperate only in a predetermined position of the optical element on the support. More particularly, the elastic fastening means comprise a frame and the elastic blade carried by this frame, and each frame has an amount configured to come into contact with an arrangement formed in the support. This arrangement can take any form allowing the cooperation with the amount, and can in particular take the form of a shoulder on which the amount of the frame comes to rest.

It can be observed from the foregoing that the elastic fixing means can on the one hand participate in the positioning by the shape of the frame and the amounts that compose it, and their cooperation with forms complementary on the support, before playing on the other hand their role of maintaining the optical element in this predetermined position

The optical element is made of a transparent or translucent material. By way of non-limiting example, the transparent or translucent material may comprise polycarbonate (PC), polymethylmethacrylate (PMMA), silicone or any related material. It may be provided that certain parts of the optical element are made of a material different from that used for the rest of the other parts of this optical element. For example, the elastic fastening means are essentially composed of polycarbonate and / or polymethylmethacrylate, while the remainder of the optical element is composed of silicone. This ensures that the portion of the optical element directly facing the light sources or electronic components arranged on the support is made of silicone which is a more heat-resistant material produced by these components.

The optical element can be made by any industrial process used for the manufacture of similar parts. Alternatively, the optical element is made by molding or injection. Each element or sub-part of the optical element may be made by a different method than that used to manufacture the other elements or sub-parts of the optical element.

The optical element may comprise one or more optical elements forming, by way of example, at least one microlens acting as primary optics directly in the vicinity of the light source or sources, in particular in applications in light devices for a motor vehicle where the light modules are mounted on a plate on which is also positioned a projection lens then forming a secondary optics. In the light module according to the invention, it can be provided that the optical element comprises a plurality of microlenses, each microlens being intended to cooperate with a distinct light source, being opposite this light source when the support element is in the predetermined position relative to the support. Each pair formed by a light source and a microlens is configured to participate in the formation of a selectively activatable light segment, in particular by independent control of each of the light sources. By activatable selectively, it will be understood that the light segment can be activated, either automatically or by an action of the user, independently or not other light segments, adjacent or not.

The elastic fixing means extend on either side of the optical elements. In other words, it is expected that there is a series arrangement of these optical elements, and that the resilient fixing means are arranged on the end edges of the support in the main direction of this series.

In the predetermined position, the optical element is then relatively arranged on the support by pressing on the upper part of the support and by pressing on the lower part of the support. These two supports are made at equal distance, or essentially at equal distance from the microlenses. This arrangement ensures that the microlenses are in a position where they collaborate with the light source regardless of manufacturing tolerances that could lead to a positioning problem.

The light module may further comprise at least one thermal conduction member. The thermal conduction member is in particular arranged to conduct the heat emitted by the light source to a heat sink.

The thermal conduction member comprises a base, configured to be in contact with the support, and at least one gripping finger for positioning the thermal conduction member. The base can be made from material with the gripping finger, or be made distinctly.

The gripping finger comprises at least one orifice to allow the gripping of the thermal conduction member. The orifice (s) are arranged to enable grasping of the gripping finger, in particular by an adjusting machine, in order to correctly orient the thermal conduction member so that, when the thermal conduction member (s) are in the predetermined position, the or the supports can be arranged on the body of corresponding thermal conduction.

The base, the support and the optical element each comprise a fixing orifice, the orifices coming face to face to receive a fixing means. The mounting holes of the support and the optical element are slightly larger than that of the base, in order to compensate for a deviation from the manufacturing tolerances. The fastening means may be a screw, a rivet, a rivet, glue or any other suitable fastening means. More particularly, the fastening means is a screw. The fixing hole of the base comprises a thread corresponding to that of the screw. Fixing all the elements of the light module between them is provided by a single fastening means.

The base has at least one indexing pin and the light source support has at least one indexing hole. The indexing pins are intended to cooperate with the indexing orifices to properly position the support on the base before being fixed by the fixing means described above. For this purpose, the indexing pins have a shape and dimensions complementary to those of the indexing orifices.

It is understood that the optical element is in place on the support without the last fixing screw, in particular by virtue of the joint action of indexing means, elastic fastening means and the collaboration of the amounts on the shoulder.

The assembly of an optical element, a support and a base has the advantage of creating a light module, which can be assembled and adjusted easily in a vehicle headlight. In particular, it is conceivable to fix the light module according to the invention on an element of the vehicle headlight, in particular a mounting plate or a housing. It is also possible to integrate more than one light module according to the invention into a vehicle headlamp.

The invention relates to a luminous device comprising the light module as previously described with a light source support, the light source and the optical element, and a projection lens forming a secondary optics configured to receive and deflect the rays. light deviated by the optical element forming the primary optics.

Each pair formed by a light source and a primary optics can cooperate with a secondary optics of their own, or with a common secondary optics.

The light device described by the invention can be advantageously used for headlamps equipped with Adaptive Driving Beam (Adaptive Driving Beam) function. Such an ADB function is intended to automatically detect a user of the road likely to be dazzled by a beam of light emitted in headlight mode by a projector, and to modify the outline of this beam of light in a manner to create a shadow zone at the location of the detected user. The advantages of the ADB function are multiple: comfort of use, better visibility compared to a lighting in dipped beam mode, better reliability for the change of mode, risk of dazzling greatly reduced, driving safer.

The possibility of modifying the illumination beam is ensured by the division of all the rays emitted by the light sources into selectively activatable vertical segments. This division is ensured by the separation of the light rays by the specific association of a light source and a microlens, all producing little or no parasitic rays due to the presence of a microlens in the direct vicinity of the light. 'a source. The light module according to the invention is therefore particularly suitable for the application of an ADB function.

• la figure 1 est une vue en éclaté d'un module lumineux selon un premier mode de réalisation de l'invention, représentant notamment les faces avant des éléments constitutifs du module,
• la figure 2 est une vue en éclaté du module lumineux de la figure 1, rendant notamment visible les faces arrière des éléments visibles sur la figure 1,
• la figure 3 est une vue en perspective d'un module lumineux assemblé, selon le premier mode de réalisation de l'invention

• la figure 4 est une vue en perspective d'un dispositif lumineux comportant plusieurs modules lumineux selon l'invention, et
• la figure 5 est une vue en éclaté d'un module lumineux selon un deuxième mode de réalisation de l'invention, selon une perspective semblable à celle de la figure 1.

Other characteristics, details and advantages of the invention will emerge more clearly on reading the description given below by way of non-limiting indication in relation to the appended drawings in which:

• the figure 1 is an exploded view of a light module according to a first embodiment of the invention, in particular representing the front faces of the constituent elements of the module,
• the figure 2 is an exploded view of the light module of the figure 1 , notably making visible the rear faces of the visible elements on the figure 1 ,
• the figure 3 is a perspective view of an assembled light module, according to the first embodiment of the invention

• the figure 4 is a perspective view of a light device comprising a plurality of light modules according to the invention, and
• the figure 5 is an exploded view of a light module according to a second embodiment of the invention, in a perspective similar to that of the figure 1 .

In the figures, the elements common to several figures retain the same reference.

In the remainder of the description, the longitudinal, vertical and transverse denominations relate to an axis corresponding to the general direction of the rays emitted by the light source. The longitudinal direction corresponds to the general direction of the light rays emitted by the light source. The forward direction designates the direction of emission of light rays by the light source, the backward direction designating the opposite direction.

The directions mentioned above are also visible in a trihedron L, V, T shown in the figures.

The light module 1 comprises at least one light source 2, a support 3 of the light source 2 and an optical element 4 arranged on the path of the rays emitted by the light source 2, in particular to deflect and arrange them to participate in the creation a lighting beam and / or signaling of a motor vehicle.

In a first embodiment of the invention, illustrated on the Figures 1 to 4 , the light module 1 comprises five light sources 2.

The support 3 has the general shape of a thin plate delimited by a first face 39 where the light sources 2 are arranged, and a second face 391 opposite to the first. These two faces are delimited by an upper edge, a lower edge, and two lateral edges. The support 3 may in particular comprise a printed circuit board, on which the light sources 2 and electronic components are arranged.

The end of the first face 39 of the support 3 in the vicinity of the upper edge is narrower than the end of the first face 39 in the vicinity of the lower edge. The width reduction is achieved by at least one narrowing zone 36 formed by a shoulder 37, which creates a bearing surface 38 substantially parallel to the upper edge of the support 3.

The light sources 2 are arranged on the part of the support 3 arranged between the narrowing zone 36 and the lower edge. The light sources 2 are arranged in a transverse series, perpendicular to the lateral edges of the support 3.

The support 3 comprises, on the first face 39 between the lower edge and the light sources 2, one or more electronic components 31. These electronic components 31 can be of any type and of any nature allowing the accomplishment of a function in connection with the light module 1, such as the selective activation of one or more light sources 2.

The support 3 further comprises a first indexing orifice 32 and a second indexing orifice 33, arranged one in the vicinity of the upper edge of the support 3 and the other in the vicinity of the lower edge. These orifices 32, 33 have in the illustrated example a section of cylindrical or substantially cylindrical shape. The two indexing orifices 32, 33 may be through, that is to say extend from one face to the other of the support 3.

The support 3 further comprises an indexing hole 34 of oblong shape, which is disposed in the vicinity of the first indexing hole 32 and the light sources 2, and a central bore 35, through.

The optical element 4 is arranged facing the first face 39 of the support 3, namely the face on which the light sources 2 are arranged. The optical element 4 has a thin plate shape delimited by an internal face. 49 brought facing the support 3 when the light module is assembled, and an outer face 40 opposite to the inner face 49. The width and the thickness of the optical element 4 are essentially identical to those of the support 3, and whose length is less than that of the support 3. Depending on the orientation chosen and in particular illustrated on the figure 1 , the width corresponds to the dimension of the optical element 4 and the support 3 in the transverse direction, the thickness corresponds to the dimension of the optical element 4 and the support 3 in the longitudinal direction and the length corresponds to the dimension of the optical element 4 and support 3 in the vertical direction.

The optical element 4 comprises an elastic holding portion 62, a treatment portion 64 of the light rays and a fixing portion 66.

The processing portion 64 of the light rays of the optical element 4 comprises one or more microlenses 42, which in the illustrated example are arranged in a transverse series. The one or more microlenses 42 project from the outer face 40 of the optical element 4, having a hemispherical or essentially hemispherical shape, arranged to collaborate with the light sources 2. As will be described hereinafter, the microlenses 42 are aligned in front of the light sources 2 when the optical element 4 is attached against the support 3, having a longitudinal clearance so as not to crush the light sources 2 when the optical element 4 is pressed against the support 3. The microlenses 42 collaborate with the light sources 2 so as to project in a controlled manner the light rays emitted by the light sources 2.

These microlenses 42 form primary optics 41 when, as will be described below, the light module 1 involved in forming the optical element 4 is mounted in a light device 10 further comprising a projection lens 104 forming a secondary optics.

The optical element 4 further comprises a recess 43 and the microlenses 42 are arranged along one of the edges delimiting this recess. In the illustrated example, the recess is of substantially rectangular shape. It is understood that this recess 43 has the role of allowing the release by air of the heat produced by the light sources 2.

Between the treatment portion 64 of the light rays and the fixing portion 66, the optical element 4 comprises a fitting 44 arranged for create a clearance between the optical element 4 and the support 3 when these two parts are pressed against each other. It is thus possible to have on the support 3 a large electronic component.

The optical element 4 comprises, on the inner face 49, an indexing pin 45 (visible on the figure 2 ) of oblong shape, disposed on an edge delimiting the recess 43 opposite the microlenses 42. Thus, during the assembly of the light module 1, the indexing pin 45 of the optical element 4 extends in support direction 3.

The fixing portion 66 of the optical element 4 comprises a through bore 47. In the illustrated example, the bore 47 has a circular shape.

The elastic holding portion 62 of the optical element 4 comprises two resilient fixing means 46 respectively disposed on each of the lateral edges of the optical element 4. These elastic fixing means 46 are arranged on either side of the optical element 4, in the vicinity of the upper edge of the optical element 4. The resilient fixing means 46 extend substantially perpendicularly the plate forming the support member, on the side of the inner face 49, that is to say that elastic fixing means 46 extend opposite the microlenses 42.

Each elastic attachment means 46 comprises a frame 461 and an elastic blade 462.

The frame 461 is formed by two longitudinal uprights 463 made of material from the plate of the optical element 4 and extending substantially perpendicularly thereto, at one of the lateral edges of the optical element 4. The two longitudinal uprights 463 are connected at their free end by a segment 464, arranged in this way at a distance from the plate of the optical element 4 and which carries in its middle the elastic blade 462, which extends from the segment 464 in the direction of the approximation of the plate of the optical element 4. This elastic blade 462 is inclined relative to the parallel longitudinal uprights 463 insofar as it extends inwardly of the optical element 4. In other words, it presents a transverse component so as to extend in the direction of the approximation of the blade elastic 462 of the other elastic attachment means 46.

As will be described hereinafter in more detail, the elastic fixing portion 66 is configured such that, when the optical element 4 is in the predetermined position, each of the frames 461, and more particularly the longitudinal amount 463 lower, rests on the bearing surface 38 formed by the corresponding shoulder 37 of the support 3, and the free end of each elastic blade 462, opposite the segment 464, is in contact with the second face 391 of the support . The cooperation of the uprights 463 and the resilient blades 462 of the optical element 4 with the appropriate shapes provided on the support 3 contribute to holding the optical element 4 in position.

The light module 1 further comprises a thermal conduction member 8 on which the support 3 is pressed. The thermal conduction member 8 comprises a base 5 of shape and dimensions substantially similar to those of the support 3.

The base 5 has a contact face 50 on which are at least made a first indexing pin 51 and a second indexing pin 52, a shape complementary to the first and second orifices 32, 33 formed in the support. When the support 3 is attached against the base 5, these indexing lugs 51, 52 are arranged opposite the indexing orifices 32, 33 of the support 3, so as to allow the positioning of the support 3 relative to the base 5. .

The base 5 also comprises, on the face opposite to the contact face 50 on which the support 3 is plated, at least a first gripping finger 55 perpendicularly extending the base 5 and arranged at one end of the base 5, in the vicinity here from the top edge. In the illustrated example, there is provided a second gripping finger 56 so that these gripping fingers 55, 56 are each arranged on one end of the base 5. The gripping fingers 55, 56 can extend over all or part of the width of the base 5.

The gripping fingers 55, 56 are both intended to allow the gripping of the base 5 to allow to obtain the correct orientation of this base 5 and therefore of the entire light module 1 before its attachment in a lighting and / or signaling device in the vehicle. For this purpose, the first gripping finger 55 comprises two gripping ports 57, 58, configured to collaborate with any machine tool useful for the manufacture, assembly or adjustment of the light module 1. The gripping ports 57, 58 are disposed on the upper face of the first gripping finger 55. In the embodiment of the example, one of the gripping ports 57, 58 is through and the other not.

The base 5 further comprises an attachment hole 59 which extends in the thickness of the base from the face opposite to the contact face 50 on which the support 3 is made to be plated. In the example shown, this fixing hole 59 is through, that is to say it opens on the contact face 50, but it will be understood that it can be blind. This fixing hole 59, as will be specified below, is intended to participate in fixing the base 5 and therefore the entire light module 1 on a housing of a lighting device and / or signaling. It can in particular be threaded to receive a fixing screw 7.

Furthermore, the base 5 comprises an indexing eyelet 53, of oblong shape substantially equal to the oblong shape of the indexing hole 34 made in the support 3.

The base 5 also comprises, substantially at its center, a threaded bore 54, which extends in the thickness of the base 5 from the contact face 50 arranged to be in contact with the support 3. In the illustrated example, it is particularly illustrated that the threaded bore 54 is not through and consists of a blind hole.

The indexing pin 45 of the optical element 4 is arranged to collaborate with the indexing hole 34 and the indexing eyelet 53 to participate in the positioning of the optical element 4 on the support 3.

We will now describe, referring to the figure 4 , the light module 1 formed by the cooperation of each of the previously described elements. The figure 3 illustrates a light module 1 assembled according to the invention.

In a first step, the support 3 is disposed on the thermal conduction member 8, and more particularly on its base 5. For this purpose, the second face 391 of the support 3 is positioned facing the contact face 50. substantially the edges of the base 5 and those of the support 3, and the indexing means are thus made to correspond. The indexing lugs 51, 52 carried by the base 5 penetrate into the indexing orifices 32, 33 formed in the support, and thus ensures the relative position of the support 3 relative to the base 5. In this relative position, the indexing eye 53 is located opposite the indexing hole 34 of the support 3, and the central bore 35 of the support 3 is aligned with the central threaded bore 54 disposed on the base 5. It should be noted that the central bore 35 has a diameter greater than that of the central threaded bore 54.

The optical element 4 is then placed on the support 3, by facing the inner face 49 of the optical element 4 and the first face 39 of the support 39. The elastic fixing means 46 are then turned towards the support 3. At first, pre-positioning of the optical element 4 is performed by resting the lower longitudinal amount 463 of the frame 461 of each elastic fixing means 46 on the bearing surface 38 formed by the shoulder edge 37 made on the support 3. The optical element 4 is then slid longitudinally, that is to say perpendicularly to the plane defined by the support 3, along this bearing surface 38, it being understood that the shape of the base 5 is defined not to hinder this sliding.

During the displacement of the optical element 4 towards the support 3, the elastic blades 462, which in their original form are inclined towards the center of the optical element 4, come into contact with the lateral edge of the optical element 4. 3. The elastic blades 462 are configured to deform elastically outwardly of the optical element 4 and allow sliding.

Moreover, during the sliding of the optical element 4, the indexing pin 45 arranged on the inner face 49 of the optical element 4 comes into the position of the optical element 4 relative to the support 3 can be adjusted to allow the indexing pin 45 to be inserted into the hole of the indexing hole 34. indexing 34, then in the indexing eye 53 formed in the base 5 and disposed in the immediate extension of the indexing hole 34. Therefore, the frame 461 of the resilient fixing means 46 and the indexing pin 45 d on the one hand, and the bearing surface 38 formed by the shoulder edge 37 and the indexing hole 34 on the other hand form means for positioning the optical element 4 on the support in a determined position.

At the end of sliding, the optical element 4 is in contact with the support 3, or in the direct vicinity thereof, it being understood that these parts are configured so that the light sources 2 are not crushed by the optical element 4 in this desired position. In particular microlenses 42 are formed at the edge of the recess 43 with a slight longitudinal shift relative to the inner face 49 of the optical element 4. It will also be possible to provide on the optical element 4, as visible on the figure 2 , beads 490 for pressing the optical element 4 on the support 3 without crushing the light sources 2.

The cooperation of the positioning means, namely the positioning means 45 carried by the optical element 4 and the complementary positioning means carried by the support 3 in particular, makes it possible to obtain a predetermined position, in which the bore 47 passageway disposed in the attachment portion 66 of the optical element 4 is located opposite the central bore 35 of the support and the central threaded bore 54 of the base 5. These three bores 54, 35, 47 are thus aligned and therefore configured to receive a first fastening means 6, it being understood that the through bore 47 of the optical element 4 has a greater diameter than that of the central threaded bore 54 of the base 5.

In the predetermined position, the resilient blades 462 are passed past the support plate 3 and are no longer in contact with a side edge of this plate. From then on, they resume their original form, and tend to approach each other towards the center of the optical element 4. The free end of each elastic blade 462 then comes into position behind the support plate 3, facing the second face 391. The support 3 then forms a stop against the release of the elastic blades 462 and thus the clearance of the optical element 4. If it is desired to replace the optical element 4, it is necessary to act on the elastic blades 462 to constrain them according to a particular effort to separate them from one another and to disengage them from the support 3. In operation, without the external intervention of an operator, the position of the optical element 4 with respect to the support 3 and therefore the position of the microlenses 42 relative to the light sources 2 is reliable.

Lastly, the first fastening means 6 are used to hold together the optical element 4, the support 3 and the base 5. The first fastening means 6 is, in the example illustrated, a fastening screw, the head of the screw fastening being on the side of the optical element 4.

The optical element 4 is then relatively fixed to the support 3 at three points, and it can be seen that the center of these three points is positioned substantially in the vicinity of the microlenses 42, so that a reliable position of the microlenses 42 is ensured. compared to the light sources 2 regardless of the manufacturing tolerances.

The mounting method of the light module 1 according to the invention described below is only an example of mounting. It is in no way limiting, and it will be possible in particular to first mount the optical element 4 on the support 3, then mount this subassembly on the thermal conduction member 8 and its base 5.

The light module 1 thus formed can then be mounted on a housing or a plate of a light device by means of a second fastening means 7, in particular a fixing screw, cooperating with the fixing hole 59 formed in the base 5.

The figure 4 illustrates a light device 10 comprising several light modules 1 according to the invention, and in particular constituted such as that has just been described of a heat conduction member 8, a support 3 and an optical element 4 forming a subassembly capable of being made apart and then attached to the housing or plate of the light device.

Each light module 1 according to the invention is fixed on a plate 102 by a second fixing means 7. In the example illustrated, the light modules 1 are arranged on an axial end of the plate 102 and they are carried by a vertical wall 110 of the plate 102, which also bears, on the opposite side, a heat sink 9, here fins type.

The device also comprises a lens 104, disposed at an axial end of the plate 102 opposite to that where the light modules 1 are arranged. An optical system is thus formed comprising a primary optic 41 formed by the microlenses 42 directly in the vicinity of the sources. 2 and a secondary optical 104, each of these optics being configured to participate in the formation of a lighting beam and / or motor vehicle signaling on the basis of the light rays initially emitted by the light sources 2.

We can observe in particular figure 4 that some of the light modules 1 comprise a different number of light sources 2 and microlenses 42 associated. This is illustrated on the figure 5 a second embodiment of the light module which differs from the first embodiment previously described in that the support 3 comprises seven light sources 2, the optical element 4 correspondingly comprising seven microlenses 42 forming a primary optic 41.

As a result, the support 3 has an enlargement of its width at the level of the treatment portion 64 of the rays in order to house the series of light sources 2. The other characteristics and elements of the light module 1 in this second embodiment are identical or substantially the same as those set forth in the description of the first embodiment.

The embodiments described above are in no way limiting; it will be possible to imagine variants of the invention comprising only a selection of characteristics described subsequently isolated from other characteristics described, if this selection of characteristics is sufficient to confer a technical advantage or to differentiate the invention from the state of the prior art.

Claims (15)

Light device (10) for a motor vehicle having at least one light module (1), the light module (1) comprising at least one light source (2), a support (3) of the light source (2), and a light element optical device (4) adapted to receive rays emitted by the light source (2), the optical element (4) comprising positioning means (45, 463) of this optical element (4) on the support (3) in a predetermined position , corresponding to a predetermined position of the optical element (4) with respect to the position of the light source (2), and elastic fixing means (46) of this optical element (4) in the predetermined position, characterized in that that the luminous device (2) comprises a plate on which are arranged the at least one light module (1) and a projection lens (104), the projection lens (104) forming a secondary lens (104) while the or the optical elements (4) associated with the at least one a light module (1) form primary optics (41). Light device (10) according to claim 1, characterized in that the optical element (4) is pressed onto the support (3). Light device (10) according to any one of the preceding claims, characterized in that the support (3) comprises at least one complementary positioning means (34,38) for positioning means (45,463) of the optical element (4 ). Light device (10) according to the preceding claim, characterized in that the positioning means of the optical element (4) comprise an indexing pin (45) and the complementary positioning means of the support (3) comprises a hole d indexing means (34) for receiving the indexing pin (45) when the optical element (4) is in the predetermined position. Light device (10) according to any one of the preceding claims, characterized in that the positioning means of the optical element (4) comprise at least one upright (463) of elastic fixing means (46) and the means for complementary positioning comprise at least one bearing surface (38) formed by an edge of the support (3), the upright (463) resting on the bearing surface (38) to bring the optical element (4) into the predetermined position. Light device (10) according to any one of the preceding claims, characterized in that the elastic fixing means (46) comprise at least one segment (464) for supporting an elastic blade (462) configured so that its free end opposite said segment forms a stop against the support (3) against the release of the optical element (4). Light device (10) according to any one of the preceding claims, characterized in that the optical element (4) comprises at least one microlens (42) configured so as to face a light source (2) when the support element (4) is in the predetermined position relative to the support (3). Light device (10) according to the preceding claim, characterized in that it comprises a plurality of light sources (2) and a plurality of microlenses (42), each microlens (42) being intended to cooperate with a light source (2) to form a selectively activatable light segment. Light device (10) according to any one of the preceding claims, characterized in that it comprises a thermal conduction member (8) arranged to conduct heat emitted by the light source (2) to a heat sink (9) . Luminous device (10) according to the preceding claim, characterized in that the thermal conduction member (8) comprises a base (5) on which is integrally bonded the support (3) and the optical element (4). Luminous device (10) according to the preceding claim, characterized in that the thermal conduction member (8) further comprises at least one gripping finger (55) for positioning the thermal conduction member (8). Light device (10) according to one of Claims 10 or 11, characterized in that the base (5), the support (3) and the optical element (4) each have a fixing orifice (59, 35, 47), the fixing holes (59, 35, 47) being aligned to receive a fixing means (6). Light device (10) according to one of Claims 10 to 12, characterized in that the base (5) has at least one indexing lug (51) intended to cooperate with an indexing hole (32) of the support ( 3). A light device (10) according to any one of the preceding claims, wherein the optical element (4) comprises sub-parts, each sub-part being made by a method different from that used for making the other sub-parts of the optical element (4). Light device (10) according to any one of the preceding claims, wherein the elastic fixing means (46) are made of a material different from that used for a part of the optical element (4) directly opposite the at least one light source (2) and made of a transparent or translucent material, in particular silicone.

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