EP3543597A1 - Lighting module provided with a micro-mirror array with optimised cooling - Google Patents

Lighting module provided with a micro-mirror array with optimised cooling Download PDF

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Publication number
EP3543597A1
EP3543597A1 EP19164754.4A EP19164754A EP3543597A1 EP 3543597 A1 EP3543597 A1 EP 3543597A1 EP 19164754 A EP19164754 A EP 19164754A EP 3543597 A1 EP3543597 A1 EP 3543597A1
Authority
EP
European Patent Office
Prior art keywords
zone
lighting module
micro
air
heat sink
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19164754.4A
Other languages
German (de)
French (fr)
Other versions
EP3543597B1 (en
Inventor
Maxime Rousseau
Thomas Daniel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Vision SAS
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Valeo Vision SAS
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Filing date
Publication date
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Publication of EP3543597A1 publication Critical patent/EP3543597A1/en
Application granted granted Critical
Publication of EP3543597B1 publication Critical patent/EP3543597B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/67—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors
    • F21S41/675—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors by moving reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/42—Forced cooling
    • F21S45/43—Forced cooling using gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/04—Controlling the distribution of the light emitted by adjustment of elements by movement of reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
    • F21V29/67—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/20—Illuminance distribution within the emitted light

Definitions

  • the present invention relates to a lighting module for a projector of a motor vehicle, the lighting module comprising a matrix of micro-mirrors.
  • the invention also relates to a motor vehicle headlight comprising such a lighting module.
  • the invention also relates to a motor vehicle comprising such a projector or such a lighting module.
  • a matrix of micro-mirrors is an electromechanical microsystem comprising a multitude of micro-mirrors which are all mobile about the same axis and which can take at least two distinct orientations. According to its first orientation, a micro-mirror transmits a light beam out of the lighting module, in a lighting field. In its second orientation, the light beam is deflected out of the lighting field and is absorbed by a structure of the lighting module. The orientation of each micro-mirror can be controlled individually by the effect of an electrostatic force.
  • the lighting module comprises a control circuit connected to an electronic control unit. The electronic control unit emits a control current to each of the micro-mirrors to define their orientation.
  • Such projectors make it possible to compose and project complex images in front of the vehicle. They are therefore used to achieve various functions such as for example the projection of useful information to the safety of pedestrians located in the direct vicinity of the vehicle, or for example a road lighting function avoiding dazzling other motorists.
  • the object of the invention is to provide a lighting module overcomes the above drawbacks and improving the lighting modules known from the prior art.
  • the invention makes it possible to produce a lighting module that is compact, simple to implement and that limits heating of the light source, the matrix of micro-mirrors and their respective control circuits.
  • the air outlet of the first zone can be directed upwards by an upper face of the lighting module.
  • this air outlet can be oriented downwards, or on the sides, or at the back of the lighting module.
  • the air outlet may comprise at least one chimney passing through the second zone, in particular two chimneys crossing the second zone on either side of the first heat sink.
  • the at least one chimney can be oriented vertically and can be inclined towards the rear of the lighting module.
  • the second zone can be arranged above the first zone.
  • the third zone may be arranged below the first zone.
  • the first zone may be delimited from the second zone at least partially by a first electronic card supporting the at least one light source and / or by a base of the first heat sink.
  • the first zone may be delimited from the third zone at least partially by a second electronic card supporting the matrix of micro-mirrors and / or by a base of the second heat sink.
  • the lighting module may comprise a projection optics capable of guiding light rays reflected by the matrix of micro-mirrors, the first zone and / or the second zone comprising an air outlet above the projection optics.
  • the second zone and / or the third zone may include a forward air outlet.
  • the first zone and / or the second zone and / or the third zone may comprise an air inlet from the rear.
  • the means for generating an air flow may comprise at least one fan, in particular at least two fans.
  • the lighting module may comprise a first fan capable of generating an air flow only in the first zone and in the third zone and a second fan capable of generating an air flow only in the second zone.
  • the two fans can be arranged parallel to one above the other.
  • the at least one light source may comprise at least one light emitting diode.
  • the invention also relates to a projector comprising a lighting module as defined above.
  • the invention also relates to a motor vehicle comprising a lighting module as defined above or a projector as defined above.
  • the left and the right are defined according to the point of view of a driver of a vehicle.
  • the X axis designates the longitudinal axis of the vehicle. In forward and in a straight line, the vehicle progresses from the rear to the front in a direction parallel to its longitudinal axis.
  • the X axis is oriented from the front to the rear of the vehicle, that is to say in the direction of reverse.
  • the Y axis designates the transverse axis of the vehicle.
  • the Y axis is oriented from left to right.
  • the Z axis designates the axis perpendicular to the X axis and the Y axis.
  • the Z axis is a vertical axis when the vehicle rests on a horizontal ground.
  • the Z axis is oriented from bottom to top.
  • the X, Y and Z axes form a direct orthonormal coordinate system.
  • this same reference defined by reference to a vehicle, will also be used for a lighting module even considered outside a vehicle, since it is intended for mounting according to a specific orientation on a vehicle.
  • the figure 1 illustrates a vehicle 1 automobile provided with a projector 2 according to one embodiment of the invention.
  • the vehicle can be of any kind, for example it can be a private vehicle, a commercial vehicle or a truck.
  • the projector 2 is disposed at the front of the vehicle but could as well equip the rear of the vehicle.
  • the projector makes it possible to illuminate the road, to be seen by other motorists and / or to project on the ground images providing information to the driver or his environment.
  • the projector 2 comprises a lighting module 3 according to one embodiment of the invention.
  • the figures 2 and 3 illustrate the lighting module 3.
  • the lighting module 3 comprises a housing 10 forming a protective envelope of generally parallelepiped shape.
  • the lighting module 3 also includes various electrical connectors 4 for connecting it electrically to an electronic control unit embedded in the vehicle. These connectors can be any number and have any shape.
  • the lighting module 3 comprises a projection optic 21 directed towards the front by which light rays can be emitted.
  • the housing 10 comprises a first front opening 11 positioned above the projection optics 21, intended for the output of an air flow, substantially oriented parallel to the longitudinal axis.
  • This first front opening has a generally rectangular shape with the large side of the rectangle parallel to the transverse axis.
  • the housing 10 also comprises a second front opening 12 positioned below the projection optic 21, likewise intended for the outlet of an air flow, in a substantially longitudinally oriented manner.
  • This second front opening 12 is particularly visible on the figure 3 it is actually made of five windows positioned transversely next to each other.
  • the housing also comprises two upper openings 13 on the top of the housing 10, likewise for the output of an air flow.
  • the shape of these different openings could be different provided they allow the passage of air between the inside and the outside of the housing 10, according to an operation which will be detailed later.
  • the lighting module 3 comprises three zones Z1, Z2, Z3 which are distinct from one another. These three zones correspond to complementary volumes of the lighting module.
  • a first zone Z1 comprises on the one hand a light-emitting diode 22 connected to a first electronic card 23, and on the other hand a matrix of micro-mirrors 24 connected to a second electronic card 25.
  • the two electronic cards 23, 25 can comprise drivers or electronic components for controlling respectively the ignition of the light emitting diode 22 and the activation of the matrix of micromirrors 24.
  • the first zone Z1 also comprises the projection optics 21. It is therefore the seat of the production of light and its diffusion to the outside of the projector.
  • a second zone Z2 comprises a first heat sink 26 capable of dissipating the heat generated by the light-emitting diode.
  • a third zone Z3 comprises a second heat sink 27 able to dissipate the heat generated by the matrix of micro-mirrors 12. With reference to the vertical axis, the second zone Z2 is arranged above the first zone Z1 and the third zone Z3 is arranged below the first zone Z1. The first zone is thus arranged vertically between the second zone Z2 and the third zone Z3.
  • the first zone Z1 comprises an air outlet 30 directed upwards, by an upper face of the lighting module, and coinciding with the upper openings 13 of the housing.
  • the second zone Z2 comprises an air outlet 34 facing the front of the lighting module and coinciding with the first front opening 11 of the housing.
  • the third zone Z3 comprises an air outlet 35 facing the front of the lighting module and coinciding with the second front opening 12 of the housing. As mentioned above, these areas are distinct, and their respective air outlets are distinct.
  • the first zone Z1 is delimited from the second zone Z2 in a first plane in which the first electronic card 23 extends. foreground is inclined forwards and upwards in relation to a horizontal plane, as appears on the figures 4 and 5 .
  • the first zone Z1 is delimited from the third zone Z3 along a second plane in which the second electronic card 25 extends. This second plane is substantially horizontal.
  • the first zone Z1 comprises a cross section of generally trapezoidal shape.
  • the small base of the trapeze is on the backside of the lighting module and the large base of the trapeze is on the front side.
  • the light-emitting diode 22 is a light source 22 '. Alternatively, it could be replaced by any other form of light source such as an incandescent bulb.
  • the lighting module could comprise any number of light-emitting diodes or any other form of light source.
  • the lighting module 3 comprises a collimating lens 28 and an optical prism 29, both positioned in the first zone Z1.
  • the collimating lens 28 and the optical prism 29 are interposed between the light-emitting diode 22 and the micro-mirror array 24 so as to shape a light beam and to guide this light beam towards the matrix of micro-mirrors 24
  • the projection optics 21 are positioned downstream of the micro-mirror array 24 and are composed of several lenses in series.
  • the micro-mirror array 24 is an electromechanical microsystem comprising a multitude of flat micromirrors which are all independently movable about the same axis. Micro-mirrors can take two distinct orientations. The orientation of each micro-mirror can be controlled individually by the effect of an electrostatic force.
  • the matrix of micro-mirrors has a shape rectangular and can include several hundred micro-mirrors across the width and several hundred micro-mirrors along the length. According to a first orientation, called active orientation, a micromirror reflects a light ray coming from the light-emitting diode towards the projection optic 21.
  • a micromirror reflects a light ray coming from the electroluminescent diode elsewhere than to the projection optics.
  • the micro-mirror matrix receives a command defining which micro-mirrors are oriented according to the first orientation and which micro-mirrors are oriented according to the second orientation.
  • each micro-mirror defines a pixel of an image: the matrix of micro-mirrors can thus be used not only to obtain standardized lighting but also to project complex images.
  • the matrix of micro-mirrors is integrated into a chip of larger size. This chip is integrated in the second electronic card 25. To ensure proper operation, the temperature of the chip and the matrix of micro-mirrors must not exceed a threshold temperature.
  • the first heat sink 26 and the second heat sink 27 are thermal dissipation means by thermal conduction.
  • Each of the heat sinks is manufactured, preferably in one piece, in a heat conducting material, for example aluminum or copper. It preferably comprises an exchange surface with air as large as possible.
  • the first heat sink 26 is particularly visible on the figures 7 and 8 . It comprises a base 26A pressed against the first electronic card 23.
  • the base 26A has a generally rectangular shape and has a greater surface area than that of the first electronic card 23.
  • the base 26A makes it possible, in addition to the first electronic card, to physically separating the first zone Z1 from the second zone Z2.
  • the first heat sink 26 also includes a set of pins 26B extend generally vertically upwards.
  • the pins 26B form a grid of rectangular outer shape, a first side extends parallel to the longitudinal axis X and a second side extends parallel to the transverse axis Y. This set of pins 26B is framed right and left. left by two blanks 26C extending longitudinally and vertically.
  • the second heat sink 27 is in contact with the second electronic card 25. It comprises a base 27A extending parallel to the second electronic card 25. It also comprises a body 27D, of generally parallelepipedal shape and extending upwards from an upper face of the base 27A. This body is pressed against the chip integrating the matrix of micro-mirrors 24 so as to conduct the heat produced by the matrix of micro-mirrors 24 throughout the second heat sink 27.
  • the second heat sink 27 also comprises a set of The pins 27B extend generally vertically downward from the base 27A.
  • the pins 27B form a grid of rectangular outer shape, a first side extends parallel to the longitudinal axis X and a second side extends parallel to the transverse axis Y. This set of pins 27B is framed right and left. left by two blanks 27C extending longitudinally and vertically.
  • pins 26B, 27B can be any.
  • the pins could be replaced by fins, oriented parallel to the air flow for passing through the heat sink, that is to say parallel to the longitudinal axis X.
  • Two chimneys 30A, 30B are arranged on either side of the first heat sink 26. These two chimneys make it possible to put the first zone Z1 into communication with the outside of the lighting module.
  • the two chimneys thus constitute the air outlets 30 of the first zone Z1.
  • the two chimneys cross the second zone Z2 on either side of the first heat sink 26. They extend vertically and are substantially inclined towards the rear of the lighting module. In other words, the axis of the chimneys 30A, 30B forms with the vertical axis a non-zero angle.
  • the two chimneys open on the one hand in the first zone at a high point of the first zone Z1, that is to say at the level of the separation plane between the first zone and the second zone on the side of the large trapezoid base forming a cross section of the first zone Z1.
  • the two chimneys 30A, 30B open vis-à-vis the two upper openings 13 of the housing 10.
  • the chimneys have an ellipsoidal section but, alternatively could have a section of any other shape. Alternatively, the number of these chimneys could also be different.
  • the lighting module may consist of only one chimney or more than two chimneys.
  • the two chimneys and the first heat sink form a single piece.
  • the lighting module 3 also comprises two fans 31, 32 arranged at the rear of the lighting module, and able to generate a flow of air in each of the three zones Z1, Z2 and Z3. More particularly, a first fan 31 is arranged to generate a flow of air only in the first zone Z1 and in the third zone Z3 and a second fan 32 is arranged so as to generate an air flow only in the second zone Z2.
  • the two fans 31, 32 are arranged vertically one above the other.
  • the two fans may be identical or at least have a substantially identical outer shape.
  • each fan comprises at least one rotating blade 31A, 32A, and an electric motor capable of driving the rotating blade.
  • the lighting module includes an air inlet 33 at the rear of each fan through which fresh air can be drawn in to enter the lighting module.
  • each fan could be replaced by any other means for generating an air flow 31 ', 32'.
  • the two fans could be replaced by one more powerful fan.
  • each of the zones Z1, Z2 and Z3 When the fans are running, the airflow in each of the zones Z1, Z2 and Z3 is oriented substantially longitudinally from the rear to the front.
  • the air flows through the three zones Z1, Z2, Z3 are independent. They do not mix.
  • the three zones Z1, Z2, Z3 need not be perfectly airtight with respect to each other and air leaks between the zones can exist as long as they remain minimal compared to flow of air passing through each zone.
  • the air flow in the first zone Z1 represented on the figures 4 and 7 by a first arrow F1.
  • the air flow in the first zone Z1 is generated by the first fan and is guided between the first electronic card and the second electronic card. It convectively cools the light-emitting diode 22 and the micromirror array 24 and then escapes upwardly through the two chimneys 30A, 30B communicating with the two upper openings 13 of the housing.
  • the first fan does not work, warm air lighter than cold air will tend to come out of the first zone through the two chimneys since they extend from the highest part of the first zone Z1.
  • the hot air lighter than the cold air, will tend to come out naturally through the two chimneys to give way to colder air penetrating through the air inlet 33 at the rear of the module. lighting.
  • the architecture of the first zone Z1 is favorable to a natural minimum cooling of the first zone Z1. This phenomenon is added to the contribution of the first fan 31, so as to make optimal cooling.
  • the fresh air sucked by the second fan passes through the first heat sink by sliding around the pins 26B.
  • the air flow in the second zone is channeled laterally between the two blanks 26C, the base 26A and an upper side of the housing 10.
  • a heat exchange occurs between the fresh air and the heatsink heats. This heat exchange contributes to lowering the temperature of the first heat sink 26 and therefore of the first electronic card 23, as well as of the light-emitting diode 22.
  • a first portion of the air flow in the third zone Z3 flows between the second electronic card 25 and the base 27A of the second heat sink 27.
  • a second portion of the air flow in the third zone Z3 passes through the second heat sink 27 by sliding around its pins 27B. This second part is channeled between the two side 27C blanks, the base 27A and one side lower case 10.
  • a heat exchange occurs between the fresh air and the heatsink heats. This heat exchange contributes to lowering the temperature of the second heat sink 27 and therefore of the second electronic card 25 and the matrix of micro-mirrors 24.
  • the air flow leaves the third zone Z3 passing through the second opening front 12 of the housing.
  • the light-emitting diode When the light-emitting diode emits a light beam, it first passes through the collimating lens 28 and then the optical prism 29 before reaching the matrix of micro-mirrors 24. If the light ray reaches a micro-mirror in active orientation, it is reflected towards the optical prism 29 from which it will be deflected towards the projection optic 21. It then passes through the various lenses forming the projection optics, and thus emerges from the projector towards the front to illuminate the road or the environment of the vehicle. Such a path is represented by a line R1 dotted on the figure 4 .
  • the light beam reaches a micro-mirror inactive orientation, it is deflected out of the projection optics 21 and does not participate in the illumination of the road or the environment of the vehicle. If a parasitic light beam comes out of the lighting module by one of the chimneys 30A, 30B, for example by following the path represented by the line R2 on the figure 4 it does not participate in lighting the road or the environment of the vehicle because the chimney is tilted backwards. Thus, the backward inclination of the chimneys avoids making visible light rays that would parasitically exit the lighting module through the chimneys 30A, 30B.
  • the air outlet 30 of the first zone Z1 which may be in the form of one or more chimneys 30A, 30B, may not open upwards but on the right and / or left sides. , or to the bottom, or even the back of the lighting module 3.
  • the air outlet is advantageously substantially inclined rearwardly to prevent parasitic light rays are made visible to the front from the vehicle through the air outlet.
  • a lighting module in which a flow of air is circulated not only around heat sinks but also around the light source 22 'and the matrix of micro-mirrors.
  • the air flows are independent, which allows a particularly efficient cooling.
  • the temperature of the light source can be lowered by about 10 ° C and the temperature of the micro-mirror array can be lowered by about 5 ° C, which improves the service life and stability of the light source. reliability of these components.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Projection Apparatus (AREA)

Abstract

Module d'éclairage (3) pour projecteur (2) de véhicule (1) automobile, comprenant :- une première zone (Z1) comprenant au moins une source lumineuse (22') et une matrice de micro-miroirs (24),- une deuxième zone (Z2) comprenant un premier dissipateur thermique (26) de la chaleur générée par ladite source lumineuse (22'),- une troisième zone comprenant un deuxième dissipateur thermique (27) de la chaleur générée par la matrice de micro-miroirs (24),- au moins un moyen de génération d'un flux d'air (31', 32') pour générer un flux d'air dans la première zone (Z1), dans la deuxième zone (Z2) et dans la troisième zone (Z3),les première (Z1), deuxième (Z2) et troisième zone (Z3) étant distinctes les unes des autres, la première zone (Z1) étant agencée verticalement entre la deuxième zone (Z2) et la troisième zone (Z3), la première zone (Z1) comprenant une sortie d'air (30).Lighting module (3) for a vehicle headlamp (2) (1), comprising: - a first zone (Z1) comprising at least one light source (22 ') and a matrix of micro-mirrors (24), - a second zone (Z2) comprising a first heat sink (26) of the heat generated by said light source (22 '), - a third zone comprising a second heat sink (27) of the heat generated by the matrix of micro-mirrors (24), - at least one means for generating an air flow (31 ', 32') for generating an air flow in the first zone (Z1), in the second zone (Z2) and in the third zone (Z3), the first (Z1), second (Z2) and third zone (Z3) being distinct from each other, the first zone (Z1) being arranged vertically between the second zone (Z2) and the third zone ( Z3), the first zone (Z1) comprising an air outlet (30).

Description

Domaine technique de l'inventionTechnical field of the invention

La présente invention concerne un module d'éclairage pour un projecteur d'un véhicule automobile, le module d'éclairage comprenant une matrice de micro-miroirs. L'invention concerne également un projecteur pour véhicule automobile comprenant un tel module d'éclairage. L'invention concerne également un véhicule automobile comprenant un tel projecteur ou un tel module d'éclairage.The present invention relates to a lighting module for a projector of a motor vehicle, the lighting module comprising a matrix of micro-mirrors. The invention also relates to a motor vehicle headlight comprising such a lighting module. The invention also relates to a motor vehicle comprising such a projector or such a lighting module.

État de la techniqueState of the art

Pour l'éclairage des véhicules automobiles, on connaît l'utilisation de modules d'éclairage comprenant une source lumineuse et une matrice de micro-miroirs. Une matrice de micro-miroirs est un microsystème électromécanique comprenant une multitude de micro-miroirs qui sont tous mobiles autour d'un même axe et qui peuvent prendre au moins deux orientations distinctes. Selon sa première orientation, un micro-miroir transmet un rayon lumineux hors du module d'éclairage, dans un champ d'éclairage. Selon sa deuxième orientation, le rayon lumineux est dévié hors du champ d'éclairage et est absorbé par une structure du module d'éclairage. L'orientation de chaque micro-miroir peut être commandée individuellement par l'effet d'une force électrostatique. Le module d'éclairage comprend un circuit de commande relié à une unité de commande électronique. L'unité de commande électronique émet un courant de commande à destination de chacun des micro-miroirs pour définir leur orientation.For the illumination of motor vehicles, the use of lighting modules comprising a light source and a matrix of micro-mirrors is known. A matrix of micro-mirrors is an electromechanical microsystem comprising a multitude of micro-mirrors which are all mobile about the same axis and which can take at least two distinct orientations. According to its first orientation, a micro-mirror transmits a light beam out of the lighting module, in a lighting field. In its second orientation, the light beam is deflected out of the lighting field and is absorbed by a structure of the lighting module. The orientation of each micro-mirror can be controlled individually by the effect of an electrostatic force. The lighting module comprises a control circuit connected to an electronic control unit. The electronic control unit emits a control current to each of the micro-mirrors to define their orientation.

De tels projecteurs permettent de composer et de projeter des images complexes devant le véhicule. Ils sont donc utilisés pour réaliser différentes fonctions telles que par exemple la projection d'informations utiles à la sécurité de piétons situés aux abords directs du véhicule, ou encore par exemple une fonction d'éclairage de la route évitant l'éblouissement des autres automobilistes.Such projectors make it possible to compose and project complex images in front of the vehicle. They are therefore used to achieve various functions such as for example the projection of useful information to the safety of pedestrians located in the direct vicinity of the vehicle, or for example a road lighting function avoiding dazzling other motorists.

Lors de son fonctionnement, un tel module d'éclairage peut s'échauffer fortement. Un échauffement excessif peut conduire à un disfonctionnement, voire à la destruction, de la matrice de micro-miroirs ou de son circuit de commande. Afin de refroidir la matrice de micro-miroirs, on connaît l'utilisation de dissipateurs thermiques associés à des ventilateurs. Toutefois, ces moyens de refroidissement ne sont pas suffisamment performants pour maintenir le module d'éclairage en dessous d'une température d'endommagement.During its operation, such a lighting module can become very hot. Excessive heating can lead to malfunction or even destruction of the matrix of micro-mirrors or its control circuit. In order to cool the matrix of micro-mirrors, the use of heat sinks associated with fans is known. However, these cooling means are not powerful enough to keep the lighting module below a damage temperature.

Objet de l'inventionObject of the invention

Le but de l'invention est de fournir un module d'éclairage remédiant aux inconvénients ci-dessus et améliorant les modules d'éclairage connus de l'art antérieur. En particulier, l'invention permet de réaliser un module d'éclairage qui soit compact, simple à mettre en oeuvre et qui limite réchauffement de la source lumineuse, de la matrice de micro-miroirs et de leurs circuits de commande respectifs.The object of the invention is to provide a lighting module overcomes the above drawbacks and improving the lighting modules known from the prior art. In particular, the invention makes it possible to produce a lighting module that is compact, simple to implement and that limits heating of the light source, the matrix of micro-mirrors and their respective control circuits.

L'invention se rapporte à un module d'éclairage pour un projecteur d'un véhicule automobile comprenant :

  • une première zone comprenant au moins une source lumineuse et une matrice de micro-miroirs,
  • une deuxième zone comprenant un premier dissipateur thermique apte à dissiper la chaleur générée par l'au moins une source lumineuse,
  • une troisième zone comprenant un deuxième dissipateur thermique apte à dissiper la chaleur générée par la matrice de micro-miroirs,
  • au moins un moyen de génération d'un flux d'air pour générer un flux d'air dans la première zone, dans la deuxième zone et dans la troisième zone,
la première zone, la deuxième zone et la troisième zone étant distinctes les unes des autres, la première zone étant agencée verticalement entre la deuxième zone et la troisième zone, la première zone comprenant une sortie d'air.The invention relates to a lighting module for a headlight of a motor vehicle comprising:
  • a first zone comprising at least one light source and a matrix of micro-mirrors,
  • a second zone comprising a first heat sink able to dissipate the heat generated by the at least one light source,
  • a third zone comprising a second heat sink able to dissipate the heat generated by the matrix of micro-mirrors,
  • at least one means for generating an air flow for generating an air flow in the first zone, in the second zone and in the third zone,
the first zone, the second zone and the third zone being distinct from one another, the first zone being arranged vertically between the second zone and the third zone, the first zone comprising an air outlet.

La sortie d'air de la première zone peut être orientée vers le haut par une face supérieure du module d'éclairage. En variante, cette sortie d'air peut être orientée vers le bas, ou sur les cotés, ou à l'arrière du module d'éclairage.The air outlet of the first zone can be directed upwards by an upper face of the lighting module. Alternatively, this air outlet can be oriented downwards, or on the sides, or at the back of the lighting module.

La sortie d'air peut comprendre au moins une cheminée traversant la deuxième zone, notamment deux cheminées traversant la deuxième zone de part et d'autre du premier dissipateur thermique.The air outlet may comprise at least one chimney passing through the second zone, in particular two chimneys crossing the second zone on either side of the first heat sink.

L'au moins une cheminée peut être orientée verticalement et peut être inclinée vers l'arrière du module d'éclairage.The at least one chimney can be oriented vertically and can be inclined towards the rear of the lighting module.

La deuxième zone peut être agencée au dessus de la première zone. La troisième zone peut être agencée en dessous de la première zone.The second zone can be arranged above the first zone. The third zone may be arranged below the first zone.

La première zone peut être délimitée de la deuxième zone au moins partiellement par une première carte électronique supportant l'au moins une source lumineuse et/ou par une base du premier dissipateur thermique. La première zone peut être délimitée de la troisième zone au moins partiellement par une deuxième carte électronique supportant la matrice de micro-miroirs et/ou par une base du deuxième dissipateur thermique.The first zone may be delimited from the second zone at least partially by a first electronic card supporting the at least one light source and / or by a base of the first heat sink. The first zone may be delimited from the third zone at least partially by a second electronic card supporting the matrix of micro-mirrors and / or by a base of the second heat sink.

Le module d'éclairage peut comprendre une optique de projection apte à guider des rayons lumineux réfléchis par la matrice de micro-miroirs, la première zone et/ou la deuxième zone comprenant une sortie d'air au dessus de l'optique de projection.The lighting module may comprise a projection optics capable of guiding light rays reflected by the matrix of micro-mirrors, the first zone and / or the second zone comprising an air outlet above the projection optics.

La deuxième zone et/ou la troisième zone peut comprendre une sortie d'air vers l'avant.The second zone and / or the third zone may include a forward air outlet.

La première zone et/ou la deuxième zone et/ou la troisième zone peut comprendre une entrée d'air depuis l'arrière.The first zone and / or the second zone and / or the third zone may comprise an air inlet from the rear.

Le moyen de génération d'un flux d'air peut comprendre au moins un ventilateur, notamment au moins deux ventilateurs.The means for generating an air flow may comprise at least one fan, in particular at least two fans.

Le module d'éclairage peut comprendre un premier ventilateur apte à générer un flux d'air uniquement dans la première zone et dans la troisième zone et un deuxième ventilateur apte à générer un flux d'air uniquement dans la deuxième zone.The lighting module may comprise a first fan capable of generating an air flow only in the first zone and in the third zone and a second fan capable of generating an air flow only in the second zone.

Les deux ventilateurs peuvent être agencés parallèlement l'un au dessus de l'autre.The two fans can be arranged parallel to one above the other.

L'au moins une source lumineuse peut comprendre au moins une diode électroluminescente.The at least one light source may comprise at least one light emitting diode.

L'invention se rapporte également à un projecteur comprenant un module d'éclairage tel que défini précédemment.The invention also relates to a projector comprising a lighting module as defined above.

L'invention se rapporte également à un véhicule automobile comprenant un module d'éclairage tel que défini précédemment ou un projecteur tel que défini précédemment.The invention also relates to a motor vehicle comprising a lighting module as defined above or a projector as defined above.

Description sommaire des dessinsBrief description of the drawings

Ces objets, caractéristiques et avantages de la présente invention seront exposés en détail dans la description suivante d'un mode de réalisation particulier fait à titre non-limitatif, en relation avec les figures jointes parmi lesquelles :

  • la figure 1 est une vue schématique d'un véhicule automobile selon un mode de réalisation de l'invention ;
  • la figure 2 est une vue isométrique de dessus d'un module d'éclairage selon un mode de réalisation de l'invention ;
  • la figure 3 est une vue isométrique de face du module d'éclairage selon le mode de réalisation de l'invention ;
  • la figure 4 est une vue schématique en coupe du profil du module d'éclairage selon le mode de réalisation de l'invention ;
  • la figure 5 est une vue isométrique en coupe du module d'éclairage selon le mode de réalisation de l'invention ;
  • la figure 6 est une vue isométrique de l'arrière du module d'éclairage selon le mode de réalisation de l'invention ;
  • la figure 7 est une vue isométrique du module d'éclairage sans son boîtier de protection selon le mode de réalisation de l'invention ;
  • la figure 8 est une vue isométrique de dessus d'un premier dissipateur thermique selon le mode de réalisation de l'invention ;
  • la figure 9 est une vue isométrique de dessous d'un deuxième dissipateur thermique selon le mode de réalisation de l'invention.
These objects, features and advantages of the present invention will be set forth in detail in the following description of a particular embodiment made in a non-limiting manner, with reference to the appended figures among which:
  • the figure 1 is a schematic view of a motor vehicle according to one embodiment of the invention;
  • the figure 2 is an isometric view from above of a lighting module according to an embodiment of the invention;
  • the figure 3 is an isometric front view of the lighting module according to the embodiment of the invention;
  • the figure 4 is a schematic sectional view of the profile of the lighting module according to the embodiment of the invention;
  • the figure 5 is an isometric sectional view of the lighting module according to the embodiment of the invention;
  • the figure 6 is an isometric view of the back of the lighting module according to the embodiment of the invention;
  • the figure 7 is an isometric view of the lighting module without its protective case according to the embodiment of the invention;
  • the figure 8 is an isometric view from above of a first heat sink according to the embodiment of the invention;
  • the figure 9 is an isometric view from below of a second heat sink according to the embodiment of the invention.

Description d'un mode préférentiel de l'inventionDescription of a preferred embodiment of the invention

Sur l'ensemble des figures et de la description, la gauche et la droite sont définies selon le point de vue d'un conducteur d'un véhicule. L'axe X désigne l'axe longitudinal du véhicule. En marche avant et en ligne droite, le véhicule progresse de l'arrière vers l'avant selon une direction parallèle à son axe longitudinal. L'axe X est orienté de l'avant vers l'arrière du véhicule, c'est-à-dire dans le sens de la marche arrière. L'axe Y désigne l'axe transversal du véhicule. L'axe Y est orienté de la gauche vers la droite. L'axe Z désigne l'axe perpendiculaire à l'axe X et à l'axe Y. L'axe Z est un axe vertical lorsque le véhicule repose sur un sol horizontal. L'axe Z est orienté de bas en haut. Les axes X, Y et Z forment un repère orthonormé direct. Sur l'ensemble des figures et de la description, on considère que le véhicule repose sur un sol horizontal. D'autre part, dans un souci de simplification de la description, ce même repère, défini par référence à un véhicule, sera aussi utilisé pour un module d'éclairage même considéré hors d'un véhicule, puisqu'il est destiné à un montage selon une orientation spécifique sur un véhicule.In all the figures and the description, the left and the right are defined according to the point of view of a driver of a vehicle. The X axis designates the longitudinal axis of the vehicle. In forward and in a straight line, the vehicle progresses from the rear to the front in a direction parallel to its longitudinal axis. The X axis is oriented from the front to the rear of the vehicle, that is to say in the direction of reverse. The Y axis designates the transverse axis of the vehicle. The Y axis is oriented from left to right. The Z axis designates the axis perpendicular to the X axis and the Y axis. The Z axis is a vertical axis when the vehicle rests on a horizontal ground. The Z axis is oriented from bottom to top. The X, Y and Z axes form a direct orthonormal coordinate system. On all the figures and the description, it is considered that the vehicle rests on a horizontal ground. On the other hand, for the sake of simplifying the description, this same reference, defined by reference to a vehicle, will also be used for a lighting module even considered outside a vehicle, since it is intended for mounting according to a specific orientation on a vehicle.

La figure 1 illustre un véhicule 1 automobile muni d'un projecteur 2 selon un mode de réalisation de l'invention. Le véhicule peut être de toute nature, par exemple il peut s'agir d'un véhicule particulier, d'un véhicule utilitaire ou d'un camion. Le projecteur 2 est disposé à l'avant du véhicule mais pourrait aussi bien équiper l'arrière du véhicule. Le projecteur permet d'éclairer la route, d'être vu des autres automobilistes et/ou de projeter sur le sol des images fournissant des informations au conducteur ou à son environnement. Le projecteur 2 comprend un module d'éclairage 3 selon un mode de réalisation de l'invention.The figure 1 illustrates a vehicle 1 automobile provided with a projector 2 according to one embodiment of the invention. The vehicle can be of any kind, for example it can be a private vehicle, a commercial vehicle or a truck. The projector 2 is disposed at the front of the vehicle but could as well equip the rear of the vehicle. The projector makes it possible to illuminate the road, to be seen by other motorists and / or to project on the ground images providing information to the driver or his environment. The projector 2 comprises a lighting module 3 according to one embodiment of the invention.

Les figures 2 et 3 illustrent le module d'éclairage 3. Le module d'éclairage 3 comprend un boîtier 10 formant une enveloppe de protection de forme globalement parallélépipédique. Le module d'éclairage 3 comprend également différents connecteurs électriques 4 permettant de le relier électriquement à une unité de commande électronique embarquée dans le véhicule. Ces connecteurs peuvent être en nombre quelconque et avoir une forme quelconque.The figures 2 and 3 illustrate the lighting module 3. The lighting module 3 comprises a housing 10 forming a protective envelope of generally parallelepiped shape. The lighting module 3 also includes various electrical connectors 4 for connecting it electrically to an electronic control unit embedded in the vehicle. These connectors can be any number and have any shape.

Le module d'éclairage 3 comprend une optique de projection 21 orientée vers l'avant par laquelle des rayons lumineux peuvent être émis. Le boîtier 10 comprend une première ouverture frontale 11 positionnée au dessus de l'optique de projection 21, destinée à la sortie d'un flux d'air, de manière sensiblement orientée parallèlement à l'axe longitudinal. Cette première ouverture frontale a une forme globalement rectangulaire avec le grand coté du rectangle parallèle à l'axe transversal. Le boîtier 10 comprend également une deuxième ouverture frontale 12 positionnée en dessous de l'optique de projection 21, de même destinée à la sortie d'un flux d'air, de manière sensiblement orientée longitudinalement. Cette deuxième ouverture frontale 12 est particulièrement visible sur la figure 3 : elle est en fait constituée de cinq fenêtres positionnées transversalement les unes à côté des autres. Enfin le boîtier comprend également deux ouvertures supérieures 13 sur le dessus du boîtier 10, de même destinées à la sortie d'un flux d'air. La forme de ces différentes ouvertures pourrait être différente pourvu qu'elles permettent le passage de l'air entre l'intérieur et l'extérieur du boîtier 10, selon un fonctionnement qui sera détaillé par la suite.The lighting module 3 comprises a projection optic 21 directed towards the front by which light rays can be emitted. The housing 10 comprises a first front opening 11 positioned above the projection optics 21, intended for the output of an air flow, substantially oriented parallel to the longitudinal axis. This first front opening has a generally rectangular shape with the large side of the rectangle parallel to the transverse axis. The housing 10 also comprises a second front opening 12 positioned below the projection optic 21, likewise intended for the outlet of an air flow, in a substantially longitudinally oriented manner. This second front opening 12 is particularly visible on the figure 3 it is actually made of five windows positioned transversely next to each other. Finally the housing also comprises two upper openings 13 on the top of the housing 10, likewise for the output of an air flow. The shape of these different openings could be different provided they allow the passage of air between the inside and the outside of the housing 10, according to an operation which will be detailed later.

En référence aux figures 4 et 5, le module d'éclairage 3 comprend trois zones Z1, Z2, Z3 distinctes les unes des autres. Ces trois zones correspondent à des volumes complémentaires du module d'éclairage. Une première zone Z1 comprend d'une part une diode électroluminescente 22 connectée à une première carte électronique 23, et d'autre part une matrice de micro-miroirs 24 connectée à une deuxième carte électronique 25. Les deux cartes électroniques 23, 25 peuvent comprendre des pilotes ou des composants électroniques permettant de commander respectivement l'allumage de la diode électroluminescente 22 et l'activation de la matrice de micro-miroirs 24. La première zone Z1 comprend également l'optique de projection 21. Elle est donc le siège de la production de lumière et de sa diffusion vers l'extérieur du projecteur. Une deuxième zone Z2 comprend un premier dissipateur thermique 26 apte à dissiper la chaleur générée par la diode électroluminescente. Une troisième zone Z3 comprend un deuxième dissipateur thermique 27 apte à dissiper la chaleur générée par la matrice de micro-miroirs 12. En référence à l'axe vertical, la deuxième zone Z2 est agencée au dessus de la première zone Z1 et la troisième zone Z3 est agencée en dessous de la première zone Z1. La première zone est donc agencée verticalement entre la deuxième zone Z2 et la troisième zone Z3.With reference to figures 4 and 5 the lighting module 3 comprises three zones Z1, Z2, Z3 which are distinct from one another. These three zones correspond to complementary volumes of the lighting module. A first zone Z1 comprises on the one hand a light-emitting diode 22 connected to a first electronic card 23, and on the other hand a matrix of micro-mirrors 24 connected to a second electronic card 25. The two electronic cards 23, 25 can comprise drivers or electronic components for controlling respectively the ignition of the light emitting diode 22 and the activation of the matrix of micromirrors 24. The first zone Z1 also comprises the projection optics 21. It is therefore the seat of the production of light and its diffusion to the outside of the projector. A second zone Z2 comprises a first heat sink 26 capable of dissipating the heat generated by the light-emitting diode. A third zone Z3 comprises a second heat sink 27 able to dissipate the heat generated by the matrix of micro-mirrors 12. With reference to the vertical axis, the second zone Z2 is arranged above the first zone Z1 and the third zone Z3 is arranged below the first zone Z1. The first zone is thus arranged vertically between the second zone Z2 and the third zone Z3.

La première zone Z1 comprend une sortie d'air 30 orientée vers le haut, par une face supérieure du module d'éclairage, et coïncidant avec les ouvertures supérieures 13 du boîtier. La deuxième zone Z2 comprend une sortie d'air 34 orientée vers l'avant du module d'éclairage et coïncidant avec la première ouverture frontale 11 du boîtier. La troisième zone Z3 comprend une sortie d'air 35 orientée vers l'avant du module d'éclairage et coïncidant avec la deuxième ouverture frontale 12 du boîtier. Comme mentionné ci-dessus, ces zones sont distinctes, et leurs sorties d'air respectives sont distinctes.The first zone Z1 comprises an air outlet 30 directed upwards, by an upper face of the lighting module, and coinciding with the upper openings 13 of the housing. The second zone Z2 comprises an air outlet 34 facing the front of the lighting module and coinciding with the first front opening 11 of the housing. The third zone Z3 comprises an air outlet 35 facing the front of the lighting module and coinciding with the second front opening 12 of the housing. As mentioned above, these areas are distinct, and their respective air outlets are distinct.

La première zone Z1 est délimitée de la deuxième zone Z2 selon un premier plan dans lequel s'étend la première carte électronique 23. Ce premier plan est incliné vers l'avant et vers le haut par rapport à un plan horizontal, comme cela apparait sur les figures 4 et 5. La première zone Z1 est délimitée de la troisième zone Z3 selon un deuxième plan dans lequel s'étend la deuxième carte électronique 25. Ce deuxième plan est sensiblement horizontal. Ainsi la première zone Z1 comprend une section transversale de forme globalement trapézoïdale. La petite base du trapèze est du côté arrière du module d'éclairage et la grande base du trapèze est du coté avant.The first zone Z1 is delimited from the second zone Z2 in a first plane in which the first electronic card 23 extends. foreground is inclined forwards and upwards in relation to a horizontal plane, as appears on the figures 4 and 5 . The first zone Z1 is delimited from the third zone Z3 along a second plane in which the second electronic card 25 extends. This second plane is substantially horizontal. Thus the first zone Z1 comprises a cross section of generally trapezoidal shape. The small base of the trapeze is on the backside of the lighting module and the large base of the trapeze is on the front side.

La diode électroluminescente 22 est une source lumineuse 22'. En variante, elle pourrait être remplacée par toute autre forme de source lumineuse comme par exemple une ampoule à incandescence. Le module d'éclairage pourrait comprendre un nombre quelconque de diodes électroluminescentes ou de toutes autres formes de source lumineuse.The light-emitting diode 22 is a light source 22 '. Alternatively, it could be replaced by any other form of light source such as an incandescent bulb. The lighting module could comprise any number of light-emitting diodes or any other form of light source.

Le module d'éclairage 3 comprend une lentille de collimation 28 et un prisme d'optique 29, tous deux positionnés dans la première zone Z1. La lentille de collimation 28 et le prisme d'optique 29 sont interposés entre la diode électroluminescente 22 et la matrice de micro-miroirs 24 de manière à mettre en forme un faisceau lumineux et à guider ce faisceau lumineux vers la matrice de micro-miroirs 24. L'optique de projection 21 est positionnée en aval de la matrice de micro-miroirs 24 et est composée de plusieurs lentilles en séries.The lighting module 3 comprises a collimating lens 28 and an optical prism 29, both positioned in the first zone Z1. The collimating lens 28 and the optical prism 29 are interposed between the light-emitting diode 22 and the micro-mirror array 24 so as to shape a light beam and to guide this light beam towards the matrix of micro-mirrors 24 The projection optics 21 are positioned downstream of the micro-mirror array 24 and are composed of several lenses in series.

La matrice de micro-miroirs 24 est un microsystème électromécanique comprenant une multitude de micro-miroirs plats qui sont tous mobiles indépendamment autour d'un même axe. Les micro-miroirs peuvent prendre deux orientations distinctes. L'orientation de chaque micro-miroir peut être commandée individuellement par l'effet d'une force électrostatique. La matrice de micro-miroirs présente une forme rectangulaire et peut comprendre plusieurs centaines de micro-miroirs sur la largeur et plusieurs centaines de micro-miroirs sur la longueur. Selon une première orientation, dite orientation active, un micro-miroir réfléchit un rayon lumineux provenant de la diode électroluminescente vers l'optique de projection 21. Selon une deuxième orientation, dite orientation inactive, un micro-miroir réfléchit un rayon lumineux provenant de la diode électroluminescente ailleurs que vers l'optique de projection. La matrice de micro-miroirs reçoit une commande définissant quels micro-miroirs sont orientés selon la première orientation et quels micro-miroirs sont orientés selon la deuxième orientation. Ainsi, chaque micro-miroir définit un pixel d'une image : la matrice de micro-miroirs peut ainsi être non seulement utilisée pour obtenir un éclairage standardisé mais aussi pour projeter des images complexes. La matrice de micro-miroirs est intégrée à une puce de plus grande dimension. Cette puce est intégrée à la deuxième carte électronique 25. Pour garantir un fonctionnement correct, la température de la puce et de la matrice de micro-miroirs ne doit pas excéder une température seuil.The micro-mirror array 24 is an electromechanical microsystem comprising a multitude of flat micromirrors which are all independently movable about the same axis. Micro-mirrors can take two distinct orientations. The orientation of each micro-mirror can be controlled individually by the effect of an electrostatic force. The matrix of micro-mirrors has a shape rectangular and can include several hundred micro-mirrors across the width and several hundred micro-mirrors along the length. According to a first orientation, called active orientation, a micromirror reflects a light ray coming from the light-emitting diode towards the projection optic 21. According to a second orientation, called the inactive orientation, a micromirror reflects a light ray coming from the electroluminescent diode elsewhere than to the projection optics. The micro-mirror matrix receives a command defining which micro-mirrors are oriented according to the first orientation and which micro-mirrors are oriented according to the second orientation. Thus, each micro-mirror defines a pixel of an image: the matrix of micro-mirrors can thus be used not only to obtain standardized lighting but also to project complex images. The matrix of micro-mirrors is integrated into a chip of larger size. This chip is integrated in the second electronic card 25. To ensure proper operation, the temperature of the chip and the matrix of micro-mirrors must not exceed a threshold temperature.

Le premier dissipateur thermique 26 et le deuxième dissipateur thermique 27, sont des moyens de dissipation de la chaleur par conduction thermique. Chacun des dissipateurs thermiques est fabriqué, de préférence d'une seule et même pièce, dans un matériau conduisant la chaleur, par exemple en aluminium ou en cuivre. Il comprend de préférence une surface d'échange avec l'air aussi grande que possible.The first heat sink 26 and the second heat sink 27 are thermal dissipation means by thermal conduction. Each of the heat sinks is manufactured, preferably in one piece, in a heat conducting material, for example aluminum or copper. It preferably comprises an exchange surface with air as large as possible.

Le premier dissipateur thermique 26 est particulièrement visible sur les figures 7 et 8. Il comprend une base 26A plaquée contre la première carte électronique 23. La base 26A a une forme globalement rectangulaire et a une surface plus grande que celle de la première carte électronique 23. La base 26A permet, en complément de la première carte électronique, de séparer physiquement la première zone Z1 de la deuxième zone Z2. Le premier dissipateur thermique 26 comprend également un ensemble de picots 26B s'étendent globalement verticalement vers le haut. Les picots 26B forment un quadrillage de forme extérieure rectangulaire dont un premier coté s'étend parallèlement à l'axe longitudinal X et un deuxième coté s'étend parallèlement à l'axe transversal Y. Cet ensemble de picots 26B est encadré à droite et à gauche par deux flans 26C s'étendant longitudinalement et verticalement.The first heat sink 26 is particularly visible on the figures 7 and 8 . It comprises a base 26A pressed against the first electronic card 23. The base 26A has a generally rectangular shape and has a greater surface area than that of the first electronic card 23. The base 26A makes it possible, in addition to the first electronic card, to physically separating the first zone Z1 from the second zone Z2. The first heat sink 26 also includes a set of pins 26B extend generally vertically upwards. The pins 26B form a grid of rectangular outer shape, a first side extends parallel to the longitudinal axis X and a second side extends parallel to the transverse axis Y. This set of pins 26B is framed right and left. left by two blanks 26C extending longitudinally and vertically.

Le deuxième dissipateur thermique 27, particulièrement visible sur la figure 9, est en contact avec la deuxième carte électronique 25. Il comprend une base 27A s'étendant parallèlement à la deuxième carte électronique 25. Il comprend également un corps 27D, de forme globalement parallélépipédique et s'étendant vers le haut depuis une face supérieure de la base 27A. Ce corps est plaqué contre la puce intégrant la matrice de micro-miroirs 24 de sorte à conduire la chaleur produite par la matrice de micro-miroirs 24 dans l'ensemble du deuxième dissipateur thermique 27. Le deuxième dissipateur thermique 27 comprend également un ensemble de picots 27B s'étendent globalement verticalement vers le bas depuis la base 27A. Les picots 27B forment un quadrillage de forme extérieure rectangulaire dont un premier coté s'étend parallèlement à l'axe longitudinal X et un deuxième coté s'étend parallèlement à l'axe transversal Y. Cet ensemble de picots 27B est encadré à droite et à gauche par deux flans 27C s'étendant longitudinalement et verticalement.The second heat sink 27, particularly visible on the figure 9 , it is in contact with the second electronic card 25. It comprises a base 27A extending parallel to the second electronic card 25. It also comprises a body 27D, of generally parallelepipedal shape and extending upwards from an upper face of the base 27A. This body is pressed against the chip integrating the matrix of micro-mirrors 24 so as to conduct the heat produced by the matrix of micro-mirrors 24 throughout the second heat sink 27. The second heat sink 27 also comprises a set of The pins 27B extend generally vertically downward from the base 27A. The pins 27B form a grid of rectangular outer shape, a first side extends parallel to the longitudinal axis X and a second side extends parallel to the transverse axis Y. This set of pins 27B is framed right and left. left by two blanks 27C extending longitudinally and vertically.

Le nombre de picots 26B, 27B peut être quelconque. En variante, les picots pourraient être remplacés par des ailettes, orientées parallèlement au flux d'air destiné à traverser le dissipateur thermique, c'est-à-dire parallèlement à l'axe longitudinal X.The number of pins 26B, 27B can be any. Alternatively, the pins could be replaced by fins, oriented parallel to the air flow for passing through the heat sink, that is to say parallel to the longitudinal axis X.

Deux cheminées 30A, 30B sont agencées de part et d'autre du premier dissipateur thermique 26. Ces deux cheminées permettent de mettre en communication la première zone Z1 avec l'extérieur du module d'éclairage. Les deux cheminées constituent donc les sorties d'air 30 de la première zone Z1. Les deux cheminées traversent la deuxième zone Z2 de part et d'autre du premier dissipateur thermique 26. Elles s'étendent verticalement et sont sensiblement inclinée vers l'arrière du module d'éclairage. Autrement dit, l'axe des cheminées 30A, 30B forme avec l'axe vertical un angle non nul. Les deux cheminées débouchent d'une part dans la première zone au niveau d'un point haut de la première zone Z1, c'est-à-dire au niveau du plan de séparation entre la première zone et la deuxième zone du coté de la grande base du trapèze formant une section transversale de la première zone Z1. D'autre part, les deux cheminées 30A, 30B débouchent en vis-à-vis des deux ouvertures supérieures 13 du boîtier 10. Les cheminées ont une section ellipsoïdale mais, en variante pourraient avoir une section de toute autre forme. En variante, le nombre de ces cheminées pourrait également être différent. Le module d'éclairage pourrait ne comprendre qu'une seule cheminée ou bien plus de deux cheminées. Avantageusement, les deux cheminées et le premier dissipateur thermique forment une seule et même pièce.Two chimneys 30A, 30B are arranged on either side of the first heat sink 26. These two chimneys make it possible to put the first zone Z1 into communication with the outside of the lighting module. The two chimneys thus constitute the air outlets 30 of the first zone Z1. The two chimneys cross the second zone Z2 on either side of the first heat sink 26. They extend vertically and are substantially inclined towards the rear of the lighting module. In other words, the axis of the chimneys 30A, 30B forms with the vertical axis a non-zero angle. The two chimneys open on the one hand in the first zone at a high point of the first zone Z1, that is to say at the level of the separation plane between the first zone and the second zone on the side of the large trapezoid base forming a cross section of the first zone Z1. On the other hand, the two chimneys 30A, 30B open vis-à-vis the two upper openings 13 of the housing 10. The chimneys have an ellipsoidal section but, alternatively could have a section of any other shape. Alternatively, the number of these chimneys could also be different. The lighting module may consist of only one chimney or more than two chimneys. Advantageously, the two chimneys and the first heat sink form a single piece.

En référence à la figure 6, le module d'éclairage 3 comprend également deux ventilateurs 31, 32 agencés à l'arrière du module d'éclairage, et aptes à générer un flux d'air dans chacune des trois zones Z1, Z2 et Z3. Plus particulièrement, un premier ventilateur 31 est agencé de sorte à générer un flux d'air uniquement dans la première zone Z1 et dans la troisième zone Z3 et un deuxième ventilateur 32 est agencé de sorte à générer un flux d'air uniquement dans la deuxième zone Z2. Le premier dissipateur thermique 26, associé à la diode électroluminescente 22, bénéfice donc d'un ventilateur dédié ce qui permet un refroidissement particulièrement efficace de la diode électroluminescente. Les deux ventilateurs 31, 32 sont agencés verticalement l'un au dessus de l'autre. Avantageusement, les deux ventilateurs peuvent être identiques ou tout au moins avoir une forme extérieure sensiblement identique. Ils comprennent chacun au moins une pâle rotative 31A, 32A, et un moteur électrique apte à entraîner la pâle en rotation. Le module d'éclairage comprend une entrée d'air 33 à l'arrière de chaque ventilateur par laquelle de l'air frais peut être aspiré pour pénétrer dans le module d'éclairage. En variante, chaque ventilateur pourrait être remplacé par tout autre moyen de génération d'un flux d'air 31', 32'. Notamment, les deux ventilateurs pourraient être remplacés par un seul ventilateur plus puissant.With reference to the figure 6 , the lighting module 3 also comprises two fans 31, 32 arranged at the rear of the lighting module, and able to generate a flow of air in each of the three zones Z1, Z2 and Z3. More particularly, a first fan 31 is arranged to generate a flow of air only in the first zone Z1 and in the third zone Z3 and a second fan 32 is arranged so as to generate an air flow only in the second zone Z2. The first heat sink 26, associated with the light emitting diode 22, therefore benefits from a dedicated fan which allows cooling particularly effective of the light-emitting diode. The two fans 31, 32 are arranged vertically one above the other. Advantageously, the two fans may be identical or at least have a substantially identical outer shape. They each comprise at least one rotating blade 31A, 32A, and an electric motor capable of driving the rotating blade. The lighting module includes an air inlet 33 at the rear of each fan through which fresh air can be drawn in to enter the lighting module. Alternatively, each fan could be replaced by any other means for generating an air flow 31 ', 32'. Notably, the two fans could be replaced by one more powerful fan.

Lorsque les ventilateurs fonctionnent, le flux d'air dans chacune des zones Z1, Z2 et Z3 est orienté sensiblement longitudinalement de l'arrière vers l'avant. Les flux d'air traversant les trois zones Z1, Z2, Z3 sont indépendants. Ils ne se mélangent pas. Toutefois, les trois zones Z1, Z2, Z3 ne doivent pas nécessairement être parfaitement étanches à l'air l'une par rapport à l'autre et des fuites d'air entre les zones peuvent exister tant qu'elles restent minimes par rapport au flux d'air traversant chacune des zones.When the fans are running, the airflow in each of the zones Z1, Z2 and Z3 is oriented substantially longitudinally from the rear to the front. The air flows through the three zones Z1, Z2, Z3 are independent. They do not mix. However, the three zones Z1, Z2, Z3 need not be perfectly airtight with respect to each other and air leaks between the zones can exist as long as they remain minimal compared to flow of air passing through each zone.

Le flux d'air dans la première zone Z1, représenté sur les figures 4 et 7 par une première flèche F1. Le flux d'air dans la première zone Z1 est généré par le premier ventilateur et est guidé entre la première carte électronique et la deuxième carte électronique. Il refroidit par convection la diode électroluminescente 22 et la matrice de micro-miroirs 24 puis s'échappe vers le haut au travers des deux cheminées 30A, 30B communiquant avec les deux ouvertures supérieures 13 du boîtier. En remarque, même quand le premier ventilateur ne fonctionne pas, l'air chaud plus léger que l'air froid aura tendance à sortir de la première zone au travers des deux cheminées puisque celles-ci s'étendent depuis la partie la plus haute de la première zone Z1. L'air chaud, plus léger que l'air froid, aura tendance à ressortir naturellement par les deux cheminées pour laisser la place à de l'air plus froid pénétrant par l'entrée d'air 33 à l'arrière du module d'éclairage. Ainsi, L'architecture de la première zone Z1 est favorable à un refroidissement minimal naturel de la première zone Z1. Ce phénomène s'ajoute à la contribution du premier ventilateur 31, de manière à rendre le refroidissement optimal.The air flow in the first zone Z1, represented on the figures 4 and 7 by a first arrow F1. The air flow in the first zone Z1 is generated by the first fan and is guided between the first electronic card and the second electronic card. It convectively cools the light-emitting diode 22 and the micromirror array 24 and then escapes upwardly through the two chimneys 30A, 30B communicating with the two upper openings 13 of the housing. As a note, even when the first fan does not work, warm air lighter than cold air will tend to come out of the first zone through the two chimneys since they extend from the highest part of the first zone Z1. The hot air, lighter than the cold air, will tend to come out naturally through the two chimneys to give way to colder air penetrating through the air inlet 33 at the rear of the module. lighting. Thus, the architecture of the first zone Z1 is favorable to a natural minimum cooling of the first zone Z1. This phenomenon is added to the contribution of the first fan 31, so as to make optimal cooling.

Le flux d'air dans la deuxième zone Z2, représenté sur les figures 4 et 7 par une deuxième flèche F2, traverse le premier dissipateur thermique et ressort du projecteur au travers de la première ouverture frontale 11 du boîtier 10. L'air frais aspiré par le deuxième ventilateur traverse le premier dissipateur thermique en se glissant autour des picots 26B. Le flux d'air dans la deuxième zone est canalisé latéralement entre les deux flans 26C, la base 26A et un côté supérieur du boîtier 10. Un échange thermique se produit entre l'air frais et le dissipateur thermique plus chaud. Cet échange thermique contribue à abaisser la température du premier dissipateur thermique 26 et donc de la première carte électronique 23, ainsi que de la diode électroluminescente 22.The air flow in the second zone Z2, represented on the figures 4 and 7 by a second arrow F2, through the first heat sink and spring of the projector through the first front opening 11 of the housing 10. The fresh air sucked by the second fan passes through the first heat sink by sliding around the pins 26B. The air flow in the second zone is channeled laterally between the two blanks 26C, the base 26A and an upper side of the housing 10. A heat exchange occurs between the fresh air and the heatsink heats. This heat exchange contributes to lowering the temperature of the first heat sink 26 and therefore of the first electronic card 23, as well as of the light-emitting diode 22.

Le flux d'air dans la troisième zone Z3, représenté sur les figures 4 et 7 par une troisième flèche F3, traverse le deuxième dissipateur thermique 27 et ressort du projecteur au travers de la deuxième ouverture frontale 12 du boîtier 10. Une première partie du flux d'air dans la troisième zone Z3 circule entre la deuxième carte électronique 25 et la base 27A du deuxième dissipateur thermique 27. Une deuxième partie du flux d'air dans la troisième zone Z3 traverse le deuxième dissipateur thermique 27 en se glissant autour de ses picots 27B. Cette deuxième partie est canalisée entre les deux flans 27C latéraux, la base 27A et un côté inférieur du boîtier 10. Un échange thermique se produit entre l'air frais et le dissipateur thermique plus chaud. Cet échange thermique contribue à abaisser la température du deuxième dissipateur thermique 27 et donc de la deuxième carte électronique 25 et de la matrice de micro-miroirs 24. Le flux d'air ressort de la troisième zone Z3 en passant au travers de la deuxième ouverture frontale 12 du boîtier.The air flow in the third zone Z3, represented on the figures 4 and 7 by a third arrow F3, passes through the second heat sink 27 and leaves the projector through the second front opening 12 of the housing 10. A first portion of the air flow in the third zone Z3 flows between the second electronic card 25 and the base 27A of the second heat sink 27. A second portion of the air flow in the third zone Z3 passes through the second heat sink 27 by sliding around its pins 27B. This second part is channeled between the two side 27C blanks, the base 27A and one side lower case 10. A heat exchange occurs between the fresh air and the heatsink heats. This heat exchange contributes to lowering the temperature of the second heat sink 27 and therefore of the second electronic card 25 and the matrix of micro-mirrors 24. The air flow leaves the third zone Z3 passing through the second opening front 12 of the housing.

Lorsque la diode électroluminescente émet un rayon lumineux, celui-ci traverse tout d'abord la lentille de collimation 28 puis le prisme d'optique 29 avant d'atteindre la matrice de micro-miroirs 24. Si le rayon lumineux atteint un micro-miroir en orientation active, il est réfléchi vers le prisme d'optique 29 d'où il sera dévié vers l'optique de projection 21. Il traverse alors les différentes lentilles formant l'optique de projection, et émerge ainsi du projecteur vers l'avant pour éclairer la route ou l'environnement du véhicule. Un tel cheminement est représenté par une ligne R1 en pointillées sur la figure 4. Si le rayon lumineux atteint un micro-miroir en orientation inactive, celui-ci est dévié hors de l'optique de projection 21 et ne participe pas à l'éclairage de la route ou de l'environnement du véhicule. Si un rayon lumineux parasite sort du module d'éclairage par l'une des cheminées 30A, 30B, par exemple en suivant le cheminement représenté par la ligne R2 sur la figure 4, il ne participe pas non plus à l'éclairage de la route ou de l'environnement du véhicule car la cheminée est inclinée vers l'arrière. Ainsi, l'inclinaison vers l'arrière des cheminées évite de rendre visible des rayons lumineux qui sortiraient de manière parasite du module d'éclairage par les cheminées 30A, 30B.When the light-emitting diode emits a light beam, it first passes through the collimating lens 28 and then the optical prism 29 before reaching the matrix of micro-mirrors 24. If the light ray reaches a micro-mirror in active orientation, it is reflected towards the optical prism 29 from which it will be deflected towards the projection optic 21. It then passes through the various lenses forming the projection optics, and thus emerges from the projector towards the front to illuminate the road or the environment of the vehicle. Such a path is represented by a line R1 dotted on the figure 4 . If the light beam reaches a micro-mirror inactive orientation, it is deflected out of the projection optics 21 and does not participate in the illumination of the road or the environment of the vehicle. If a parasitic light beam comes out of the lighting module by one of the chimneys 30A, 30B, for example by following the path represented by the line R2 on the figure 4 it does not participate in lighting the road or the environment of the vehicle because the chimney is tilted backwards. Thus, the backward inclination of the chimneys avoids making visible light rays that would parasitically exit the lighting module through the chimneys 30A, 30B.

Naturellement, l'invention ne se limite pas au mode de réalisation décrit. Notamment, en variante, la sortie d'air 30 de la première zone Z1, qui peut être sous la forme d'une ou de plusieurs cheminées 30A, 30B, pourrait ne pas déboucher vers le haut mais sur les cotés droit et/ou gauche, ou vers le bas, voire à l'arrière du module d'éclairage 3. Avantageusement, dans tous les cas, la sortie d'air est avantageusement sensiblement inclinée vers l'arrière pour éviter que des rayons lumineux parasites ne soient rendus visibles à l'avant du véhicule en passant par le sortie d'air.Naturally, the invention is not limited to the embodiment described. In particular, alternatively, the air outlet 30 of the first zone Z1, which may be in the form of one or more chimneys 30A, 30B, may not open upwards but on the right and / or left sides. , or to the bottom, or even the back of the lighting module 3. Advantageously, in all cases, the air outlet is advantageously substantially inclined rearwardly to prevent parasitic light rays are made visible to the front from the vehicle through the air outlet.

Grâce à l'invention, on obtient un module d'éclairage dans lequel on fait circuler un flux d'air non seulement autour de dissipateurs thermiques mais également autour de la source lumineuse 22' et de la matrice de micro-miroirs. Les flux d'airs sont indépendants, ce qui permet d'obtenir un refroidissement particulièrement efficace. Comparativement aux modules lumineux connus, la température de la source lumineuse peut être abaissée d'environ 10°C et la température de la matrice de micro-miroirs peut être abaissée d'environ 5°C, ce qui améliore la durée de vie et la fiabilité de ces composants.Thanks to the invention, there is obtained a lighting module in which a flow of air is circulated not only around heat sinks but also around the light source 22 'and the matrix of micro-mirrors. The air flows are independent, which allows a particularly efficient cooling. Compared with known light modules, the temperature of the light source can be lowered by about 10 ° C and the temperature of the micro-mirror array can be lowered by about 5 ° C, which improves the service life and stability of the light source. reliability of these components.

Claims (16)

Module d'éclairage (3) pour un projecteur (2) d'un véhicule (1) automobile, caractérisé en ce qu'il comprend : - une première zone (Z1) comprenant au moins une source lumineuse (22') et une matrice de micro-miroirs (24), - une deuxième zone (Z2) comprenant un premier dissipateur thermique (26) apte à dissiper la chaleur générée par l'au moins une source lumineuse (22'), - une troisième zone comprenant un deuxième dissipateur thermique (27) apte à dissiper la chaleur générée par la matrice de micro-miroirs (24), - au moins un moyen de génération d'un flux d'air (31', 32') pour générer un flux d'air dans la première zone (Z1), dans la deuxième zone (Z2) et dans la troisième zone (Z3), la première zone (Z1), la deuxième zone (Z2) et la troisième zone (Z3) étant distinctes les unes des autres, la première zone (Z1) étant agencée verticalement entre la deuxième zone (Z2) et la troisième zone (Z3), la première zone (Z1) comprenant une sortie d'air (30).Lighting module (3) for a headlamp (2) of a motor vehicle (1), characterized in that it comprises: a first zone (Z1) comprising at least one light source (22 ') and a matrix of micro-mirrors (24), a second zone (Z2) comprising a first heat sink (26) able to dissipate the heat generated by the at least one light source (22 '), a third zone comprising a second heat sink (27) able to dissipate the heat generated by the matrix of micro-mirrors (24), at least one means for generating an air flow (31 ', 32') for generating an air flow in the first zone (Z1), in the second zone (Z2) and in the third zone (Z3 ) the first zone (Z1), the second zone (Z2) and the third zone (Z3) being distinct from each other, the first zone (Z1) being arranged vertically between the second zone (Z2) and the third zone (Z3) the first zone (Z1) comprising an air outlet (30). Module d'éclairage (3) selon la revendication précédente caractérisé en ce que la sortie d'air (30) de la première zone (Z1) est orientée vers le haut par une face supérieure du module d'éclairage.Lighting module (3) according to the preceding claim characterized in that the air outlet (30) of the first zone (Z1) is oriented upwards by an upper face of the lighting module. Module d'éclairage (3) selon l'une des revendications précédentes, caractérisé en ce que ladite sortie d'air (30) comprend au moins une cheminée (30A, 30B) traversant la deuxième zone (Z2), notamment deux cheminées (30A, 30B) traversant la deuxième zone (Z2) de part et d'autre du premier dissipateur thermique (26).Lighting module (3) according to one of the preceding claims, characterized in that said air outlet (30) comprises at least one chimney (30A, 30B) passing through the second zone (Z2), in particular two chimneys (30A , 30B) passing through the second zone (Z2) on either side of the first heat sink (26). Module d'éclairage (3) selon la revendication précédente, caractérisé en ce que l'au moins une cheminée (30A, 30B) est orientée verticalement et est inclinée vers l'arrière du module d'éclairage (3).Lighting module (3) according to the preceding claim, characterized in that the at least one chimney (30A, 30B) is oriented vertically and is inclined towards the rear of the lighting module (3). Module d'éclairage (3) selon l'une des revendications 1 à 3, caractérisé en ce que la sortie d'air (30) de la première zone (Z1) est inclinée vers l'arrière du module d'éclairage (3).Lighting module (3) according to one of claims 1 to 3, characterized in that the air outlet (30) of the first zone (Z1) is inclined towards the rear of the lighting module (3) . Module d'éclairage (3) selon l'une des revendications précédentes, caractérisé en ce que la deuxième zone (Z2) est agencée au dessus de la première zone (Z1), et en ce que la troisième zone (Z3) est agencée en dessous de la première zone (Z1).Lighting module (3) according to one of the preceding claims, characterized in that the second zone (Z2) is arranged above the first zone (Z1), and in that the third zone (Z3) is arranged in below the first zone (Z1). Module d'éclairage (3) selon l'une des revendications précédentes, caractérisé en ce que la première zone (Z1) est délimitée de la deuxième zone (Z2) au moins partiellement par une première carte électronique (23) supportant l'au moins une source lumineuse (22') et/ou par une base (26a) du premier dissipateur thermique (26), et/ou en ce que la première zone (Z1) est délimitée de la troisième zone (Z3) au moins partiellement par une deuxième carte électronique (25) supportant la matrice de micro-miroirs (24) et/ou par une base (27a) du deuxième dissipateur thermique (27).Lighting module (3) according to one of the preceding claims, characterized in that the first zone (Z1) is delimited from the second zone (Z2) at least partially by a first electronic card (23) supporting the at least a light source (22 ') and / or a base (26a) of the first heat sink (26), and / or in that the first zone (Z1) is delimited from the third zone (Z3) at least partially by a second electronic card (25) supporting the micro-mirror array (24) and / or a base (27a) of the second heat sink (27). Module d'éclairage (3) selon l'une des revendications précédentes, caractérisé en ce qu'il comprend une optique de projection (21) apte à guider des rayons lumineux réfléchis par la matrice de micro-miroirs (24), la première zone (Z1) et/ou la deuxième zone (Z2) comprenant une sortie d'air au dessus de l'optique de projection.Lighting module (3) according to one of the preceding claims, characterized in that it comprises a projection optic (21) capable of guiding light rays reflected by the matrix of micro-mirrors (24), the first zone (Z1) and / or the second zone (Z2) comprising an air outlet above the projection optics. Module d'éclairage (3) selon l'une des revendications précédentes, caractérisé en ce que la deuxième zone (Z2) et/ou la troisième zone (Z3) comprend une sortie d'air (34, 35) vers l'avant.Lighting module (3) according to one of the preceding claims, characterized in that the second zone (Z2) and / or the third zone (Z3) comprises an air outlet (34, 35) towards the front. Module d'éclairage (3) selon l'une des revendications précédentes, caractérisé en ce que la première zone (Z1) et/ou la deuxième zone (Z2) et/ou la troisième zone (Z3) comprend une entrée d'air (33) depuis l'arrière.Lighting module (3) according to one of the preceding claims, characterized in that the first zone (Z1) and / or the second zone (Z2) and / or the third zone (Z3) comprises an air inlet ( 33) from the back. Module d'éclairage (3) selon l'une des revendications précédentes, caractérisé en ce que le moyen de génération d'un flux d'air (31', 32') comprend au moins un ventilateur (31, 32), notamment au moins deux ventilateurs (31, 32).Lighting module (3) according to one of the preceding claims, characterized in that the means for generating an air flow (31 ', 32') comprises at least one fan (31, 32), particularly at the minus two fans (31, 32). Module d'éclairage (3) selon la revendication précédente, caractérisé en ce qu'il comprend un premier ventilateur (31) apte à générer un flux d'air uniquement dans la première zone (Z1) et dans la troisième zone (Z3) et un deuxième ventilateur (32) apte à générer un flux d'air uniquement dans la deuxième zone (Z2).Lighting module (3) according to the preceding claim, characterized in that it comprises a first fan (31) capable of generating a flow of air only in the first zone (Z1) and in the third zone (Z3) and a second fan (32) capable of generating a flow of air only in the second zone (Z2). Module d'éclairage (3) selon la revendication précédente, caractérisé en ce que les deux ventilateurs (31, 32) sont agencés parallèlement l'un au dessus de l'autre.Lighting module (3) according to the preceding claim, characterized in that the two fans (31, 32) are arranged parallel to one above the other. Module d'éclairage (3) selon la revendication précédente, caractérisé en ce que l'au moins une source lumineuse (22') comprend au moins une diode électroluminescente (22).Lighting module (3) according to the preceding claim, characterized in that the at least one light source (22 ') comprises at least one light emitting diode (22). Projecteur (2) comprenant un module d'éclairage (3) selon l'une des revendications précédentes.Projector (2) comprising a lighting module (3) according to one of the preceding claims. Véhicule automobile (1), caractérisé en ce qu'il comprend un module d'éclairage (3) selon l'une des revendications 1 à 14 ou un projecteur (2) selon la revendication précédente.Motor vehicle (1), characterized in that it comprises a lighting module (3) according to one of claims 1 to 14 or a projector (2) according to the preceding claim.
EP19164754.4A 2018-03-23 2019-03-22 Lighting module provided with a micro-mirror array with optimised cooling Active EP3543597B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1852522A FR3079283B1 (en) 2018-03-23 2018-03-23 LIGHTING MODULE EQUIPPED WITH A MATRIX OF MICRO-MIRRORS WITH OPTIMIZED COOLING

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EP3543597A1 true EP3543597A1 (en) 2019-09-25
EP3543597B1 EP3543597B1 (en) 2022-05-25

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EP (1) EP3543597B1 (en)
CN (1) CN110296374B (en)
FR (1) FR3079283B1 (en)

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CN111561685A (en) * 2019-09-30 2020-08-21 长城汽车股份有限公司 Lighting apparatus and vehicle
CN111692573A (en) * 2019-09-30 2020-09-22 长城汽车股份有限公司 Lighting device and vehicle

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US20170160542A1 (en) * 2015-12-08 2017-06-08 Toyota Jidosha Kabushiki Kaisha Vehicle headlamp
WO2017132713A1 (en) * 2016-02-02 2017-08-10 Zkw Group Gmbh Lighting unit for a motor vehicle

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KR101220063B1 (en) * 2010-11-19 2013-01-08 주식회사 에스엘라이팅 Intelligent head lamp assembly of vehicle
FR3034494B1 (en) * 2015-03-30 2018-04-27 Valeo Vision LUMINOUS MODULE FOR MOTOR VEHICLE PROJECTOR
FR3044393B1 (en) * 2015-11-27 2019-04-26 Valeo Vision MOTOR VEHICLE PROJECTOR LIGHTING MODULE AND PROJECTOR

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WO2017056469A1 (en) * 2015-09-29 2017-04-06 パナソニックＩｐマネジメント株式会社 Light source device and projection device
US20170160542A1 (en) * 2015-12-08 2017-06-08 Toyota Jidosha Kabushiki Kaisha Vehicle headlamp
WO2017132713A1 (en) * 2016-02-02 2017-08-10 Zkw Group Gmbh Lighting unit for a motor vehicle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111561685A (en) * 2019-09-30 2020-08-21 长城汽车股份有限公司 Lighting apparatus and vehicle
CN111692573A (en) * 2019-09-30 2020-09-22 长城汽车股份有限公司 Lighting device and vehicle
CN111692573B (en) * 2019-09-30 2022-02-25 长城汽车股份有限公司 Lighting device and vehicle

Also Published As

Publication number Publication date
EP3543597B1 (en) 2022-05-25
FR3079283A1 (en) 2019-09-27
CN110296374A (en) 2019-10-01
CN110296374B (en) 2022-10-28
FR3079283B1 (en) 2020-10-02

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