• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a device for attenuating electromagnetic disturbances generated by at least one electronic component, disposed on a printed circuit board (33) mounted on a first face (31) of a card carrier (12) and carrying a at least one light-emitting diode driven by the at least one electronic component for emitting light rays. A containment cage is disposed around at least said electronic component, it is partially formed by walls integral with said first face and on which rests the printed circuit board, so as to delimit a confinement zone of the waves. The confinement zone has an opening (74), in a first direction, able to be closed or not by a closing piece (34, 80) separate from said walls. The invention further relates to a light module equipped with such a device, and a motor vehicle comprising a light module according to the invention.
    公开号:FR3020444A1
    申请号:FR1453838
    申请日:2014-04-28
    公开日:2015-10-30
    发明作者:Franck Dinant；Florestan Debert；Mohamed Jaaidane；Dirkie Sacchet；David Boudikian；Marc Duarte
    申请人:Valeo Vision Belgique SA；
    IPC主号:
    专利说明:

    [0001] The present invention relates to an electromagnetic interference attenuation device, and more particularly relates to the application of such a device in a light module. having a light emitting diode. In this type of module, light-emitting diodes are used more and more frequently for the emission of light rays in order to carry out a lighting and / or signaling function of a motor vehicle. The use of these diodes makes it possible in particular to focus the emitted light beam and allows in a small footprint, associated with optical deflection means, to easily direct the light beam at the output of the light module in a desired direction. Thermal cooling means are conventionally associated with this type of light modules equipped with a light-emitting diode, since this diode is carried by a printed circuit board also carrying electronic components for carrying out the supply and control of the diode. . These components must be cooled for their punctual operation and their behavior over time. Some of these electronic components, for example a DC / DC converter, generate electromagnetic disturbances, and it is necessary to prevent their diffusion outside the module to prevent them from interfering with other electronic equipment present in the vehicle. For this purpose, we know the use of metal cage, playing the role of Faraday cage, which is just positioned in recovery of the printed circuit board. These metal cages can be expensive, and they have a frozen design by the manufacturers of these cages that can impact the design and arrangement of electronic components on the printed circuit board. The present invention is in this context, seeking to provide an electromagnetic interference attenuation device that does not have the disadvantages mentioned above, and that is particularly simple to implement and adaptable to different configurations of modules. The present invention proposes a device for attenuating electromagnetic disturbances generated by at least one electronic component, arranged on a printed circuit board which is mounted on a first face of a card support and which carries at least one diode. electroluminescent sensor driven by the at least one electronic component for the emission of light rays, said device comprising an electromagnetic wave confinement cage disposed around at least said electronic component. According to the invention, the cage is partially formed by walls integrally formed with said first face of the card support and on which the printed circuit board rests, so as to delimit in said card holder and on the printed circuit board. a confinement zone of the waves. And the confinement zone has an aperture, in a first direction, able to be closed, according to the attenuation needs of the device, by a closure part distinct from said walls. Thus, there is provided an attenuation device which is easily achievable, in particular formed by a specific molding. This makes it possible, for example, to form the support by molding it so as to form a hood or a radiator, furthermore provided for the general cooling of the light source, or even by molding it so as to form a radiator forming a hood itself. . The device according to the invention allows to provide in the housing adapted to receive the electronic components an opening that allows to adapt to different cases in which the attenuation device is implanted. For example, depending on the position of the module in the motor vehicle as a whole, we may or may not take into consideration the electromagnetic disturbances, and do without the insert if the electromagnetic disturbances are considered insignificant. This saves material, resulting in a gain in weight, and promotes an opening for cooling by ventilation of the electronic components and the printed circuit board. In the case where, on a different vehicle, the electromagnetic disturbances must be taken into account because the module is closer to the passenger compartment, it can be provided to close the housing and the electronic components by the insert. The device according to the invention may comprise one or more of the following characteristics: the diode or diodes are controlled by several components, all of these components being confined in said cage; the electronic component driving said light-emitting diode is a component of a voltage converter; according to an embodiment of the invention this converter is a DC / DC converter, in particular a switching converter; according to one embodiment of the invention, the voltage conversion is performed by several components, these components being all housed in said cage, the components not participating in this conversion, for example protection components of the converter against electromagnetic noise or overvoltages, which can be accommodated outside the cage; - The containment walls comprise two substantially parallel lateral walls and a transverse wall connecting them to a longitudinal end, delimiting between them the confinement zone with the opening which can extend substantially parallel to the transverse wall; - The transverse wall has a substantially flat free end on which the printed circuit board bears so that it extends on either side of the transverse wall; the board carries a plurality of electronic components which are distributed, according to their ability to produce electromagnetic disturbances, on either side of said transverse wall; - The side walls have a free end such as a wall extends the side of the side wall opposite the confinement area, forming a receiving seat of a lateral end of the printed circuit board; the card support is hollowed out at least in the confinement zone, so that a border extends along the opening of said confinement zone; the bottom wall of the confinement zone comprises an additional wall which extends opposite the edge delimiting the opening, so that a channel runs along the border between the latter and the additional wall; each containment side wall has at its end facing said opening a baffle going in the direction of the distance from the opposite side wall and in that the channel extends to said baffle. According to other features of the invention, the diode is disposed on an outer face of the printed circuit board, facing away from the card carrier, while the at least one electronic component is disposed on the inner face. of the card, facing towards the card support, so as to be housed in the confinement zone. And the card holder can carry on its external face means of thermal cooling. The card support can be, according to various embodiments of the invention, integrated in the support housing, or, as will be described in more detail below, be formed by a closure cover of a housing arranged in the support housing.
    [0002] The invention also relates to a light module for lighting and / or signaling of a motor vehicle, of the type comprising at least one light-emitting diode capable of emitting light rays towards optical deflection means so that these rays are directed towards an output face of the module, said module comprising a printed circuit board on which is connected the at least one light emitting diode and at least one electronic component for controlling the operation of said at least one diode. The module according to the invention comprises on the one hand a support housing in which a cavity is arranged to house the printed circuit board for the proper positioning of the diode, and on the other hand a card holder adapted to carry said card. printed circuits. The module comprises an electromagnetic interference attenuation device generated by said at least one electronic component, said attenuation device comprising a cage partially formed by walls integrally formed with the internal face of said card support and having an opening made according to a first direction. A closure piece can close said opening. While the walls are integral with the card holder, the closure piece is distinct from these walls.
    [0003] According to one embodiment of the invention, the closure piece is made of a metallic material. This makes it possible to reinforce the attenuation of the electromagnetic disturbances generated by the said at least one electronic component. According to an advantageous embodiment, the closure piece is electrically connected to a metal surface of the reflector. This further enhances the attenuation by said closure member of the electromagnetic disturbances generated by said at least one electronic component. This metal surface of the reflector may be a reflective surface of the reflector, in particular that intended to reflect the light rays coming from the light source of the light module. This surface may for example be a metal layer deposited on a material, in particular by aluminizing.
    [0004] According to features specific to an embodiment of the invention, the closure piece is an insert on the printed circuit board so as to extend between the card and the card holder. The closure piece is then adapted to be attached at one end to the printed circuit board and to be housed at the other end in a channel formed in the card carrier. The card support is also dug so that it forms a housing for the at least one electronic component for controlling the operation of the at least one light-emitting diode, and the channel is formed by a border of the housing and an additional wall which extends substantially parallel to this border. The channel advantageously forms a baffle blocking the path of electromagnetic waves. It will be provided that the height of the closure piece is such that this closure piece extends into the channel without contact with the bottom wall of the channel. Thus, an air passage is left between the closure piece and the channel for aeration of the electronic components present in the confinement zone. According to features of the invention, said closure member comprises bosses, which extend projecting from the plane of the part substantially in the vicinity of the end adapted to be housed in the channel. It may take the form of a folded sheet metal part, and this part may comprise tabs which extend, in the plane of the part, the edge of the part adapted to be in contact with the printed circuit board, said tabs being adapted to cooperate with lights formed in the printed circuit board. These tongues may for example be electrically connected to a metal surface of the reflector, as mentioned above. Advantageously, the folded sheet metal part is made of stainless steel, this choice of material allowing on the one hand a good flexibility of the workpiece for easy folding of the tongues after they have passed through the lights and for the deformation of the tongues. bosses in the channel, and on the other hand to prevent oxidation of the closure piece. In an alternative embodiment, it may be provided that the closure piece is a wall integral with the housing support of the reflector. For example, the closure piece is an extension of the support housing and is formed by a material coated with a metal layer, for example by aluminizing. According to one embodiment of the invention, this part is then electrically connected to the card support, especially when the support is a metal radiator. This connection is made by a contact means, for example a metal blade. The support housing and the reflector can be integrally formed in one piece. Thus the closure piece and the reflector may for example be aluminized at the same time during their manufacture. According to other characteristics of the invention: the opening is turned in the same direction as that of emission of light by said light module; the device for attenuating electromagnetic disturbances is a device such as has just been described above; - The card holder is a cover for closing said housing; the housing may be the housing of said module, the housing comprising a first orifice closed by a closure glass forming said output face of the module, and a second orifice closed by said support; - The casing has an inner wall constituting a reflecting wall, said optical deflection means comprising said reflecting wall or being constituted by said reflecting wall. The invention also relates to a motor vehicle comprising at least one light module as just briefly presented and as will be detailed below. In particular, in the motor vehicle according to the invention, a specific orientation of the module is favored so that the opening of the confinement zone is turned away from the passenger compartment of the vehicle.
    [0005] Other characteristics and advantages of the invention will appear on reading the detailed description of an embodiment which follows and for the understanding of which reference will be made to the appended figures in which: FIG. section of a reflector of a light module according to the invention, in which optical deflection means are partially represented, covered by a support housing and an associated cover; - Figure 2 is a perspective view, on the top, of the support housing and the hood shown in Figure 1; - Figure 3 is a view similar to Figure 2 with the support case alone; - Figure 4 is a view similar to Figure 2 with the hood alone; FIG. 5 is a view of the cover of FIG. 4, seen in perspective, this time from below, a printed circuit board and an attached element being also shown; FIG. 6 is a view of the hood and the insert of FIG. 5, at a slightly different angle, the printed circuit board being removed to make visible the inner face of the hood; - Figure 7 is a view similar to Figure 5, wherein the cover has been removed to leave visible only the printed circuit board and the insert; - Figure 8 is a perspective view of the insert, in the same orientation as that of Figure 7; - Figures 9 and 10 are similar to Figures 5 and 6, without insert; - Figures 11 and 12 are views, respectively in section and in perspective, of an alternative embodiment wherein the insert is replaced by a wall integral with the support housing; and Fig. 13 is a sectional view of another alternative embodiment in which the insert carries a specific tab for electrical contact with a surface of the reflector.
    [0006] A light module comprises in particular a reflector facing which is placed a light emitting diode carried by a printed circuit board. The reflector 2 has on the one hand optical deflection means 4 (visible in FIG. 1), advantageously having a substantially elliptical shape, for deflecting the light rays emitted by the diode towards an output face of the module not shown here, and on the other hand a support housing 6 which covers the upper end of the optical deflection means, made integral with the housing. The support casing 6 substantially takes the form of a flat covering wall, which has on an outer face 8, facing away from the optical deflection means, heat exchange means 10, and which has fixing means 11 to a module frame. As illustrated in the figures, the heat exchange means are formed on an outer face of a cover 12, arranged in a housing 14 (visible in FIG. 3) formed in the cover wall of the support housing, by means of ribs projecting from the hood opposite the covering wall.
    [0007] The housing has two concentric annular walls 16, 18, between which is housed a seal 20, only visible in Figure 12 and compressed when the cover is attached against the support housing, and a cavity 22 arranged inside. of the inner annular wall 16. The cavity has a hole 24 passing through the covering wall, so as to allow the passage of the light rays emitted by the light emitting diode, as will be described hereinafter, and indexing pads 26 to allow the correct positioning of the printed circuit board carrying this light emitting diode. The hole 24 extends transversely, so as to allow the transverse diffusion of the rays emitted by the diode over the entire transverse dimension of the optical deflection means after these rays have passed through the cover wall of the support housing. In the example shown, four indexing studs have been provided and complementary shapes are provided on the cover that is pressed against the housing, and possibly on the printed circuit board carried by the hood, as is visible in Figure 5.
    [0008] The cover is illustrated in Figure 4 seen from above, that is to say with the outer face 28, carrier of the heat exchange ribs, which is visible. The cover has on this outer face a central thickening 30, adapted to allow a consequent recess of the inner face 31 opposite for the housing of the printed circuit board. The cover further comprises fixing bores 32 to the support casing, so as to ensure the attachment of the cover on the support case by means of screwing means not shown. A first embodiment, illustrated in FIGS. 5 to 8, in which a printed circuit board 33 is attached to the inner face 31 of the cover visible in these figures, with an insert element 34 which closes an opening left between the plate and the hood. The printed circuit board 33 consists of a plate on which the light emitting diode is soldered as well as electronic components for controlling the operation of the diode, according to control instructions received by a module associated with the diode. When the printed circuit board 33 is attached to the inner face 31 of the cover, it is understood that the diode is soldered on the outer face of the card, opposite the cover 12 to be able to emit light rays towards the deflection means optical 4 through the through hole 24, while the electronic components are welded to the inner face of the card, facing the hood 12.
    [0009] The electronic components are welded to the plate, and these components can advantageously be arranged on the plate according to their electromagnetic wave generation potential. It will thus be possible to place the large suppliers of electromagnetic disturbances, such as for example a DC / DC voltage converter, in a specific area of the plate to ensure their placement in the wave confinement cage as it is going to be. be described below. Electronic components that do not create or have little electromagnetic interference can be arranged on the plate. The plate has around its perimeter notches 36 adapted to cooperate with the indexing studs 26 arranged on the support case 6, and it has at its center bores 38 adapted to cooperate with indexing barrels arranged this time on the face internal hood, as will be described below. The plate also comprises lights 40 arranged regularly near a longitudinal front edge 42 of the printed circuit board, adapted to cooperate with tabs carried by the insert 34. Here, four of these lights are provided. In the illustrated example, the plate has at each longitudinal end rounded edges 44 and, from one longitudinal end to the other, two parallel lateral edges 46 delimited longitudinally by transverse edges 48 which extend perpendicularly these lateral edges towards the outside the plate. As is particularly visible in Figure 6, the inner face 31 of the cover is recessed to form a housing and has projecting elements adapted to form a confining cage electromagnetic waves 20 generated by the electronic components. The recess of the inner face comprises two zones separated substantially transversely by containment walls. A first zone 50 is delimited by these walls and by a circular border 51 and a second zone, forming the confinement zone 52, is delimited by these walls 25 and by a border 53 formed by straight segments. The inner face 31 of the cover comprises, within these walls delimiting the housing, a central barrel 54, with a channel 56 around the periphery to prevent the thermal tab overflows the assembly of the printed circuit board on the hood . A thermal lug is indeed placed on the top of the barrel adapted to be in contact with the printed circuit board assembly, to facilitate the transmission of heat emitted by the diode to the hood and its thermal cooling means. The inner face 31 of the cover also carries two indexing rods 58 longitudinally disposed on either side of the central barrel 54, and indexing means 60 complementary to those formed on the support casing 6 for clamping the printed circuit board. 33. As described above, the inner face of the cover has walls that project from the bottom wall of the housing to define the first zone 50 and the confinement zone 52. A first transverse wall 62 extends substantially across the housing. Its free end opposite the hood has a flat surface, to serve as a support for the printed circuit board. The transverse wall is extended perpendicularly by lateral walls 64 which are connected respectively to one of the lateral ends of the transverse wall. These side walls have a main part 66, which extends longitudinally in the continuity of the transverse wall, and a baffle formed of an intermediate wall 68 which extends transversely to the main part and of a substantially parallel end wall 70 at the main part.
    [0010] As can be seen in FIG. 6, on which the printed circuit board has not been shown, the side walls 64, unlike the transverse wall 62, do not have a flat surface at their free end, but a low wall 72 disposed on the side opposite the confinement zone and which forms a stop for the introduction of the circuit board on the side walls. Thus, when the printed circuit board is in place on the cover, as shown in FIG. 5, the card rests on the flat face of the transverse wall so that it extends on either side of this wall. transverse, while it rests on the side walls with the walls surrounding it.
    [0011] The sidewalls 64 are truncated at the end of the baffle, so that they do not meet each other, and thus leave an opening 74 at a forward longitudinal end of the baffle zone. confinement, between the side walls, at the edge 53 formed by straight segments.
    [0012] Here, a front and rear longitudinal end is defined according to the implantation in the vehicle. As will be explained below, the orientation chosen here is particularly interesting in that the opening is directed away from the passenger compartment, so that any leakage of electromagnetic waves would be without consequences. It will be understood, however, that the orientation of the assembly could change without departing from the context of the invention. The bottom wall of the housing is a flat surface, on one as on the other of the zones delimited by the edges and the confinement walls. It can be observed in FIG. 6 that an additional wall 76 extends projecting from the bottom wall, opposite the edge 53 formed by the straight segments. The additional wall 76 has a lower height than the edge 53 and is also formed by straight segments to extend parallel to this edge. This forms a channel 78 between the edge of the housing and the additional wall, wherein the insert element 34 is able to come to take place. It can be seen in FIG. 6 that the additional wall and the associated channel extend at the foot of the baffle formed by the lateral confinement walls 64, so that a zone of overlap is created between the channel and the walls. As is the case in the illustrated embodiment, the depth of the containment cage formed in the housing on one side of the confinement walls may be greater than that of the housing on the other side of the confinement walls. It will thus be possible to house larger electronic components. As it has just been described, the confinement cage 52 of the electromagnetic waves produced in the light module according to the invention is specific in that it has an opening 74 in a first axial direction. FIGS. 5 to 8 show a first mode of use, in which an insert element 34, placed between the cover 12 and the printed circuit board 33, acts as a closure piece able to block this opening, and is shown in Figures 9 and 10, the alternative, namely a second mode of use wherein the axial opening 74 is left and is not blocked by an insert. According to one embodiment of the invention, the insert element acting as a closure piece is made of a metallic material. This makes it possible to reinforce the attenuation of the electromagnetic disturbances generated by the said at least one electronic component. In the first mode of use, the insert takes the form of a folded sheet metal part 80, visible in particular in FIG. 8. The part is folded to take the form of successive straight portions, complementary to that of the channel 78 formed at the axial end of the confinement zone 52. Along the length of the piece, a first edge 82 carries fastening means and a second edge 84 is straight. Here, the insert is secured to the plate. The fastening means take the form of tabs 86, each tab projecting from the first edge 82, in the plane of the right portion of the piece which it extends. The folded sheet metal part further includes bosses 88 formed projecting from the plane of the part, in the vicinity of the second right edge 84. These bosses are intended to ensure the grounding of the folded sheet metal part, caused to stop them. electromagnetic waves generated in the containment zone, on the hood. The sheet metal part is advantageously made of stainless steel, interesting here to have good elasticity of the part at the bosses to facilitate the contact of the part with the hood at the channel, and for there to be no oxidation of the sheet metal part.
    [0013] The height of the insert, acting as a closing piece, that is to say the distance between the first bearing edge of the fastening means and the second plane edge, is slightly less than the distance between the support plane of the printed circuit board and the bottom of the housing at the level of the channel. In this way, an air passage is left between the bottom of the housing and the insert element acting as a closure part of the opening of the confinement zone. The cooperation of the printed circuit board, the bonnet housing and the closure part of the containment zone will now be described in more detail. The sheet metal part is mounted on the printed circuit board, by sliding the tabs 86 of the sheet metal part into the slots 40 formed in the vicinity of an edge of the plate. The card is urged against the plate so that the tabs protrude from the other side of the plate and can be folded against the face of the plate opposite the sheet metal part. This is thus retained by the printed circuit board and the assembly can be used to be housed between the reflector support housing and the cover forming the heat exchange means. To facilitate assembly, the printed circuit board is placed in overlap with the cavity 22 formed in the support casing, with the face of the carrier board of the diode facing the support casing and thus the element attached to the housing. opposite of the support housing. The complementary indexing means is matched to ensure the correct position of the printed circuit board, in which the light-emitting diode is facing the cavity, able to emit rays through the support housing towards the deflection means optical. The cover is then covered by covering the housing 14 of the support casing, a seal being previously lodged between the concentric annular walls. Again, the complementary indexing means 30 are made to cooperate to bring the hood against the printed circuit board, until the plate is in contact with the confinement walls and the upper faces of the central barrel and the various means. indexing. The electronic components, protruding from the plate, take place in the confinement zone delimited by the walls of the hood and by the closing part. It may be provided that certain components are arranged on the plate so that they are located on the other side of the transverse wall, towards the rear longitudinal end, but it will be ensured that the electronic components generating the largest electromagnetic disturbances are housed in the containment zone. The position of the plate is defined by the cooperation of the indexing means, and in this position, the walls projecting protruding lateral containment walls extend opposite the printed circuit board. These walls block the lateral diffusion of electromagnetic waves, while the transverse wall on which rests the printed circuit board blocks the longitudinal diffusion of these waves backwards.
    [0014] During this installation, the end of the piece of sheet metal is housed in the channel, with the bosses that deform to enter this channel ensuring contact with the edge of the housing. It is indeed more interesting that the bosses are in contact with the edge of the housing rather than the additional wall, which is mainly the role of a baffle deflection of electromagnetic waves. The cover is then screwed onto the support casing and the circuit board is thus firstly pressed into the seat formed for this purpose by the lateral confinement walls and secondly pressed against the transverse wall, to seal the containment area except for the opening left at the forward longitudinal end. The electromagnetic waves emitted during the operation of the light-emitting diode are confined and can only escape through the front longitudinal end. The additional wall formed projecting from the bottom wall extends opposite the second edge of the insert and thus prevents the waves from passing directly between this second edge and the bottom wall of the channel, while there is a mounting clearance between this edge and the bottom wall making the closure by the inset member not sealed, which also allows a cooling of the confinement area by an air passage. The electromagnetic waves escaping from the front longitudinal end and blocked by the additional wall massively come into contact with the sheet metal part, which prevents their diffusion outside the confinement zone. The very small percentage of these waves escaping from the confinement zone by a succession of reflections to pass on the one hand between the additional wall and the closure part, then between this closure piece and the bottom wall, and finally between this closure piece and the edge defining the housing, is thus acceptable. It is particularly interesting that air can make the reverse path to allow aeration of the confinement zone, where a confinement zone made completely sealed by the presence of containment walls completely delimiting the zone does not allow this contribution of outside air.
    [0015] In the second mode of use, the axial opening of the confinement zone is not closed, no element being reported between the printed circuit board and the cover. It will be understood that electromagnetic waves can escape through this opening and that this mode of use should be preferred when the electronic components soldered on the printed circuit board are not very generating electromagnetic disturbances, or when the arrangement of the light module relative to the passenger compartment of the vehicle, or the orientation of the axial opening, makes it possible to ignore the impact of these electromagnetic waves. For example, it may be advantageous to favor the orientation of the light module in the vehicle so that the opening of the confinement zone is turned away from the passenger compartment, so as to be able to do without more easily the presence of the closing part. An embodiment variant, illustrated in FIGS. 11 and 12, will now be described, in which an equivalent of the insert element is produced by a wall 90 made integrally with the support casing 106 carrying the optical deflection means 104.
    [0016] The cover 112 is the same, the confinement zone 152 remaining unchanged with an opening arranged at the front longitudinal end. The printed circuit board 133 is substantially shorter in the longitudinal dimension, so that it does not cover the channel 178 formed at this opening by the presence of the additional wall 176. It is a rising wall 90 which is extends perpendicular projection of the support housing 106 which plays the role of the closure part. The height of this rising wall is determined to extend facing the bottom wall of the channel when the cover is attached to the support housing, as shown in Figure 11. The function remains the same as above, to know how to block the diffusion to the outside of the cover of electromagnetic disturbances. The wall is advantageously coated with a metal layer, for example by aluminizing. It is shaped to be electrically connected to the cover or any other type of card support.
    [0017] Thus, thanks to the electromagnetic interference attenuation device according to the invention, it is possible to adapt the confinement zone to different practical cases, whether or not there is a closure part as a function of the orientation and the position in the vehicle of this device, and that the closing piece is originally provided in the support housing or that it is an insert. Another variant embodiment is illustrated in FIG. 13, according to which the closure piece is electrically connected to a metal surface of the reflector. The attenuation of the electromagnetic disturbances generated by the at least one electronic component is thus reinforced by the closing part. This metal surface of the reflector may be a reflecting surface of the reflector, in particular that intended to return the light rays coming from the light source of the light module. This surface may for example be a metal layer deposited on a material, in particular by aluminizing. In the variant illustrated in FIG. 13, the tabs 286 have a first tab 92 adapted to maintain the insert 234 with respect to the printed circuit board 233 (the card holder is not shown here) and a second tab 94 adapted to be electrically connected to a metal surface of the reflector. The second tab is here introduced into a specific opening 96 to facilitate contacting the insert and the tongue. It is understood that the tongue could have a shape and other dimensions to come into contact with other parts of the reflector. The foregoing description clearly explains how the invention makes it possible to achieve the objectives it has set itself and in particular to propose an electromagnetic interference attenuation device that allows a great modularity. Advantageously, depending on the orientation and the distance to the passenger compartment of the light source and the electronic components carried by the printed circuit board and electromagnetic wave generators, whether or not a closure piece is placed to close the containment zone. In the first embodiment where the closure piece is formed by an insert, it is furthermore allowed to have a device made of two materials, with the plastic embodiment of almost the entire device, so that the realization molding allows to achieve a specific design according to the implementation of the components, only the reported closure part being made by a sheet metal part. Another main advantage of the device according to the invention is to provide a closure of the confinement zone which is not sealed for the proper ventilation of the interior of the confinement zone. The presence of the closure piece, whether it is material or an insert, and the presence of baffles formed in the housing receiving the printed circuit board and the closure part, prevent electromagnetic leakage, without however, to prevent the flow of air which allows the cooling of the interior of the confinement zone. Of course, various modifications may be made by those skilled in the art to the structures of the light module, which have just been described as non-limiting examples.
    权利要求:
    Claims (28)
    [0001]
    REVENDICATIONS1. An electromagnetic disturbance attenuation device provided by at least one electronic component, disposed on a printed circuit board (33) which is mounted on a first face (31) of a card carrier (12) and is a carrier of at least one light-emitting diode driven by the at least one electronic component for emitting light rays, said device comprising an electromagnetic wave confinement cage disposed around at least said electronic component, characterized in that the cage is partially formed by walls 10 (62, 64) integrally formed with said first face of the card support and on which the printed circuit board rests, so as to delimit in said card holder and on the printed circuit board a confinement zone waves (52), said confinement zone having an opening (74), in a first direction, capable of being closed, as required s of attenuation of the device, by a closure piece (34, 80, 90) separate from said walls.
    [0002]
    2. Device according to claim 1, characterized in that the confinement walls comprise two side walls (64) and a transverse wall (62) connecting them to a longitudinal end, delimiting between them said confinement zone (52) with said opening (74). 20
    [0003]
    3. Device according to claim 2, characterized in that the transverse wall (62) has a substantially flat free end on which the printed circuit board (33) abuts so that it extends from side to side. other of the transverse wall.
    [0004]
    4. Device according to claim 3, characterized in that the card 25 carries a plurality of electronic components which are distributed, according to their ability to produce electromagnetic disturbances, on either side of said transverse wall (62).
    [0005]
    5. Device according to one of claims 2 to 4, characterized in that the side walls (64) have a free end such that a wall (72) extends the side of the side wall opposite the confinement zone (52). ), forming a receiving seat of a lateral end of the printed circuit board (33).
    [0006]
    6. Device according to one of the preceding claims, characterized in that the card holder (12) is hollowed out at least in the confinement zone (52), so that a border (53) extends along the the opening (74) of said confinement zone.
    [0007]
    7. Device according to claim 6, characterized in that the bottom wall of the confinement zone (52) comprises an additional wall (76) extending opposite the edge (53) near the opening ( 74), so that a channel (78) runs along the border between it and the additional wall.
    [0008]
    8. Device according to one of the preceding claims, characterized in that the diode is disposed on an outer face of the printed circuit board (33), facing away from the card support, while the at least one component electronics is disposed on the inner face of the card, facing the card holder (12), so as to be housed in the confinement zone (52).
    [0009]
    9. Device according to one of the preceding claims, characterized in that the card holder (12) carries on its outer face heat exchange means (10).
    [0010]
    10. Device according to one of the preceding claims, characterized in that said card holder is a closure cap.
    [0011]
    11. Lighting module for lighting and / or signaling of a motor vehicle, characterized in that it comprises an electromagnetic interference attenuation device according to one of the preceding claims, said at least one light emitting diode being suitable to emit light rays towards optical deflection means (4) so that these rays are directed towards an exit face of the module, said module comprising a support housing (6) arranged to house said printed circuit board (33) for the good positioning of the diode.
    [0012]
    12. Light module according to claim 11, characterized in that a closure member (34, 80, 90) closes said opening (74).
    [0013]
    13. The light module according to claim 12, characterized in that the closure piece (34, 80, 90) is distinct from said walls (62, 64).
    [0014]
    Light module according to Claim 12 or 13, characterized in that the closing piece is an insert (34) on the printed circuit board (33) so as to extend between the card and the card holder ( 12).
    [0015]
    15. Light module according to claim 14, characterized in that the closure piece is adapted to be fixed at one end to the printed circuit board (33) and to be housed at the other end in a channel (78). formed in said card holder (12).
    [0016]
    16. Light module according to claim 15, characterized in that the card holder (12) is hollowed out so that it forms a housing for the at least one electronic component for controlling the operation of said at least one diode, the channel (78) being formed by a border (53) of said housing and an additional wall (76) extending substantially parallel to said border.
    [0017]
    17. Light module according to claim 15 or 16, characterized in that the height of the closure piece (34, 80, 90) is such that this closure part extends into the channel (78) without contact with the wall bottom of the channel.
    [0018]
    18. Light module according to claim 17, characterized in that said piece (80) comprises bosses (88), which project from the plane of the piece substantially in the vicinity of the end adapted to be housed in the channel (78).
    [0019]
    19. Light module according to one of claims 12 to 18, characterized in that said closure member is a folded sheet metal part (80).
    [0020]
    20. Light module according to claim 19, characterized in that the folded sheet metal part (80) comprises tabs (86) which extend, in the plane of the workpiece, the edge of the piece that can be in contact with the card. circuit board (33), said tabs being adapted to cooperate with slots (40) formed in the printed circuit board.
    [0021]
    21. Light module according to claim 20, characterized in that the tongues (86) are electrically connected to a metal surface of the support housing.
    [0022]
    22. Light module according to one of claims 19 to 21, characterized in that the folded sheet metal part (80) is made of stainless steel.
    [0023]
    23. Light module according to one of claims 12 to 13, characterized in that the closure member is a wall (90) integral with the support housing (6).
    [0024]
    24. The light module according to one of claims 11 to 23, characterized in that the opening (74) is rotated in the same direction as that of emission of light by said light module.
    [0025]
    25. Light module according to one of claims 11 to 24, characterized in that the electromagnetic interference attenuation device is a device according to one of claims 1 to 10.
    [0026]
    26. Light module according to one of claims 11 to 25, characterized in that said card holder is a cover for closing said housing (6).
    [0027]
    27. Light module according to claim 26, characterized in that said housing (6) is the housing of said module, the housing comprising a first orifice closed by a closure glass forming said output face of the module, and a second orifice closed by said cover.
    [0028]
    28. Light module according to claim 27, characterized in that said housing (6) has an inner wall constituting a reflecting wall, said optical deflection means (4) comprising said reflecting wall or being constituted by said reflecting wall. th
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    同族专利:
    公开号 | 公开日
    CN105015401A|2015-11-04|
    US9702528B2|2017-07-11|
    US20150323159A1|2015-11-12|
    EP2940375A1|2015-11-04|
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    引用文献:
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    EP1770793A2|2005-09-30|2007-04-04|Osram Opto Semiconductors GmbH|Housing for an optoelectronic device emitting electromagnetic radiation, device and method for manufacturing said housing or device|
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    DE102009016876A1|2009-04-08|2010-10-14|Osram Gesellschaft mit beschränkter Haftung|Lighting unit for vehicle headlights and vehicle headlights|
    US20120057351A1|2010-09-07|2012-03-08|Ruud Lighting, Inc.|LED Lighting Fixture|
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    JP3193604B2|1995-12-25|2001-07-30|株式会社小糸製作所|Vehicle lamp having a discharge bulb|
    WO2008119392A1|2007-04-03|2008-10-09|Osram Gesellschaft mit beschränkter Haftung|Semiconductor light module|
    FR2949841B1|2009-09-04|2011-12-09|Valeo Vision Sas|OPTICAL MODULE FOR A MOTOR VEHICLE PROJECTOR EQUIPPED WITH AN ELECTRICAL CONNECTING MEMBER WITH REMOTE ORGANS|
    US8240887B2|2010-08-27|2012-08-14|Tyco Electronics Corporation|LED light module|FR3026467B1|2014-09-30|2019-10-04|Valeo Vision|LUMINOUS MODULE COMPRISING AT LEAST ONE COMPONENT AND A CONNECTOR ARRANGED ON A HEAT SINK, AND LIGHTING DEVICE FOR A MOTOR VEHICLE COMPRISING SUCH A MODULE|
    FR3032516B1|2015-02-06|2021-04-16|Valeo Vision|LUMINOUS MODULE REFLECTOR DEVICE WITH ELECTROMAGNETIC SHIELDING|
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    CN107883340A|2017-07-31|2018-04-06|上海小糸车灯有限公司|A kind of LED Rear Fog Lamps of automobile|
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    法律状态:
    2015-04-30| PLFP| Fee payment|Year of fee payment: 2 |
    2015-10-30| PLSC| Search report ready|Effective date: 20151030 |
    2016-04-28| PLFP| Fee payment|Year of fee payment: 3 |
    2017-04-28| PLFP| Fee payment|Year of fee payment: 4 |
    2018-04-26| PLFP| Fee payment|Year of fee payment: 5 |
    2020-01-10| ST| Notification of lapse|Effective date: 20191206 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1453838A|FR3020444B1|2014-04-28|2014-04-28|DEVICE FOR ATTENUATING ELECTROMAGNETIC DISTURBANCES, AND LIGHT MODULE OF A MOTOR VEHICLE EQUIPPED WITH SUCH A DEVICE|FR1453838A| FR3020444B1|2014-04-28|2014-04-28|DEVICE FOR ATTENUATING ELECTROMAGNETIC DISTURBANCES, AND LIGHT MODULE OF A MOTOR VEHICLE EQUIPPED WITH SUCH A DEVICE|
    EP15163398.9A| EP2940375A1|2014-04-28|2015-04-13|Device for attenuating electromagnetic interference, and lighting module of a motor vehicle provided with such a device|
    US14/694,202| US9702528B2|2014-04-28|2015-04-23|Device for attenuating electromagnetic disturbances, and motor vehicle light module equipped with such a device|
    CN201510208634.0A| CN105015401A|2014-04-28|2015-04-28|Device for attenuating electromagnetic interference, and lighting module of a motor vehicle provided with such a device|
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