EP3346184B1 - Improved light emission module for a motor vehicle - Google Patents

Improved light emission module for a motor vehicle Download PDF

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Publication number
EP3346184B1
EP3346184B1 EP17207835.4A EP17207835A EP3346184B1 EP 3346184 B1 EP3346184 B1 EP 3346184B1 EP 17207835 A EP17207835 A EP 17207835A EP 3346184 B1 EP3346184 B1 EP 3346184B1
Authority
EP
European Patent Office
Prior art keywords
light emitting
module
housing
opening
emitting module
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.)
Active
Application number
EP17207835.4A
Other languages
German (de)
French (fr)
Other versions
EP3346184A1 (en
Inventor
Stephan Sommerschuh
Christophe Duval
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
Original Assignee
Valeo Vision SAS
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Filing date
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP3346184A1 publication Critical patent/EP3346184A1/en
Application granted granted Critical
Publication of EP3346184B1 publication Critical patent/EP3346184B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0025—Combination of two or more reflectors for a single light source
    • 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
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/26—Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
    • F21S43/31—Optical layout thereof
    • 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
    • F21S45/48—Passive cooling, e.g. using fins, thermal conductive elements or openings with means for conducting heat from the inside to the outside of the lighting devices, e.g. with fins on the outer surface of the lighting device
    • 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
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/505—Cooling arrangements characterised by the adaptation for cooling of specific components 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
    • 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
    • F21V29/673—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans the fans being used for intake
    • 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
    • F21V29/677—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans the fans being used for discharging
    • 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
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
    • 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
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/83—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—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
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/50—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the field of the invention relates to light emitting devices that include motor vehicles and light emitting modules that include these devices.
  • Some of these modules include a light emitting source which is coupled to a mirror module comprising a plurality of selectively controllable micromirrors for moving between a position in which they contribute to an output light beam of the device, and another position in which they do not contribute.
  • a mirror module comprising a plurality of selectively controllable micromirrors for moving between a position in which they contribute to an output light beam of the device, and another position in which they do not contribute.
  • this type of module produces, in addition to light, heat that tends to accumulate within the light emitting device.
  • the emission modules with heat sinks, comprising, for example, cooling fins coupled to a given element.
  • the invention aims to improve this situation.
  • At least a portion of the mirrors are, in second position, arranged to reflect the light rays coming from the light emission source towards at least one wall of the housing, the second opening being formed in the wall.
  • the light emitting module comprises at least one masking element arranged on an optical path between the mirror module and the second opening, the masking element being configured to prevent the output of the housing via the second opening of the light rays coming from the mirrors and taking the optical path.
  • the masking element extends from the wall.
  • the flow of fluid flows in contact with the masking element.
  • the light emission module comprises at least two masking elements extending from the wall, the two masking elements delimiting between them a fluid circulation channel opening out of the wall. housing via the second opening.
  • the second opening forms an outlet opening of the fluid flow of the housing.
  • the housing comprises a plurality of second openings, the cooling module being configured to generate a plurality of fluid flows each flowing between the first opening and one of the second openings.
  • the light emission source comprises a heat sink arranged through the housing or arranged outside the housing, the cooling module being further configured to generate a second flow of fluid flowing on contact heat sink.
  • the cooling module comprises a fan.
  • the fan is configured to simultaneously generate the flow of fluid flowing in the interior volume of the housing and the second flow of fluid flowing in contact with the heat sink.
  • a fluid outlet of the fan is arranged opposite the first opening.
  • the cooling module comprises a circulation line fluidly connecting a fluid outlet of the fan to the first opening.
  • the fan is an axial fan.
  • the fan is a centrifugal fan.
  • the invention further relates to a light emitting device, particularly for a motor vehicle, comprising a light emitting module as defined above.
  • the light emission device is a lighting and / or signaling device for a motor vehicle.
  • the light emitting device is configured to implement one or more photometric functions, in particular regulated.
  • the Figure 1 illustrates a light emitting device 2 according to the invention, hereinafter device 2, configured to emit light.
  • the device 2 is advantageously a device intended to be integrated into a motor vehicle. In other words, it is a motor vehicle device.
  • the device 2 is a lighting and / or signaling device for a motor vehicle.
  • It is for example configured to implement one or more photometric functions.
  • a photometric function is for example a lighting function and / or visible signaling for a human eye. Note that these photometric functions may be subject to one or more regulations establishing colorimetry, intensity, spatial distribution requirements according to a so-called photometric grid, or ranges of visibility of the light emitted.
  • the device 2 is for example a lighting device and is then a projector - or headlight - vehicle. It is then configured to implement one or more photometric functions for example chosen (s) from a low beam function called “code function” (regulations 87 and 123 UNECE), a function of position lights (007 UNECE regulation) , a high beam function called “road function” (regulation 123 UNECE), an anti-fog function (regulations 019 and 038 UNECE).
  • code function regulations 87 and 123 UNECE
  • a function of position lights (007 UNECE regulation
  • a high beam function called "road function”
  • an anti-fog function regulations 019 and 038 UNECE
  • the device is a signaling device intended to be arranged at the front or rear of the vehicle.
  • these photometric functions include a function of indication of change of direction (regulation 006 UNECE), a daytime running function known by the acronym DRL (regulation 087 UNECE) , for "Daytime Running Light", a front light signature function.
  • these photometric functions include a function of indication of recoil (regulation 023 UNECE), a function stop (regulation 007 UNECE), a function of fog (regulations 019 and 038 UNECE), a direction change indication function (006 UNECE regulation), a backlight signature function.
  • the device 2 is provided for lighting the passenger compartment of a vehicle and is then intended to emit light mainly in the passenger compartment of the vehicle.
  • the device 2 is described in a non-limiting manner in a configuration in which it is intended to emit light outside the vehicle.
  • the device 2 comprises an envelope 4 and a closure glass 6 cooperating with one another to internally delimit a cavity 8.
  • the device 2 further comprises a light emitting module 10 according to the invention, hereinafter module 10, arranged wholly or partly in the cavity 8.
  • the module 10 is configured to generate a light beam F.
  • the closure glass which is transparent for at least a portion of the light beam F.
  • the light emission module 10 comprises a housing 12, a light emitting source 14, a mirror module 16, a shaping optics 18 and a cooling module 20.
  • the light emitting module 2 comprises in addition, at least one masking element 22.
  • the housing 12 is configured to host at least a portion of the elements of the module.
  • the housing 12 is advantageously rigid. It presents for example a parallelepipedic general shape. However, alternatively, it has any shape.
  • the housing 12 is for example made from polycarbonate (of acronym PC) opaque.
  • the housing 12 is for example made from aluminum.
  • the housing 12 includes walls which jointly delimit an interior volume 23 of the housing.
  • the housing 12 further comprises at least a first opening O1 and a second opening 02. These openings are formed in one or more walls of the housing. The openings are advantageously formed in separate walls.
  • the first and second openings O1, 02 form an inlet opening of a fluid flow intended to circulate in the interior volume and described below, respectively an outlet opening of the fluid flow.
  • the first opening is formed in a side wall of the housing.
  • the second opening is for example made in another side wall of the housing. For example, these side walls are facing each other.
  • the openings O1, 02 are formed in the same wall.
  • the housing 12 includes more than one first opening O1, and / or more than one second opening.
  • the housing comprises an opening O1, and a plurality of openings 02.
  • the light emitting source 14, hereinafter source 14 forms the light-emitting core of the module 10. In other words, it is adapted to emit light rays within the light emitting module.
  • the light emitting source 14 comprises a light emitting element 24 adapted to emit light rays, an optics 25 and a substrate 26 on which the light emitting element is arranged.
  • the light emitting element 24 is for example a light-emitting diode configured to generate light rays when it is supplied with electrical energy.
  • the photoemissive element 24 is configured to generate white light rays.
  • the optics 25 is configured to shape at least a portion of the light rays coming from the light emitting element 24.
  • the optics 25 is more specifically configured to shape the light rays emitted by the light emitting element 24 of so that most of these rays 16
  • substantially all the light rays formed by the optical 25 reaches the mirror module.
  • the shaping optics 25 comprises or is formed by a lens.
  • the shaping optics 25 is arranged facing the light emitting element 24. For example, it is fixed with respect to the light emitting source 14.
  • the substrate 26 is a support for the photoemissive element. In addition, it is configured to supply the photoemissive element 24 with electrical energy for the generation of light rays by it.
  • the substrate 26 comprises or is in the form of a printed circuit, known by the acronym PCB for "Printed Circuit Board”.
  • the source 14 further comprises a heat sink 28 thermally coupled to the substrate 26 and configured to dissipate heat generated by the source 14 during its operation.
  • the heat sink 28 comprises a plurality of cooling fins 30 extending from a base of the dissipator attached to a rear face of the substrate 26.
  • the source may include a control module (not shown) adapted to control the substrate and the photoemissive element for switching on and off thereof.
  • the source 14 is arranged wholly or partly in a receiving orifice formed in a wall of the housing 12.
  • the source 14 is fixed through a wall of the housing 12 in all or part.
  • it is arranged vis-à-vis this orifice.
  • vis-à-vis is meant that at least a portion of the source is visible through the orifice in an observation direction facing the orifice.
  • the source 14 is arranged vis-à-vis this orifice, the dissipator being partly received through the orifice.
  • the light emitting source 14 is arranged to emit at least a portion of its light rays towards the mirror module 16.
  • it is arranged so that the majority of the rays it emits reach up to mirror module 16.
  • the source 14 has a preferred transmission direction oriented towards the mirror module 16.
  • the shaping optics 18 is configured to deflect at least a portion of the light rays from the source 14 to form the beam F of the light emitting module 10. As described below, the rays that reach it are mainly from a reflection made by the mirror module 16.
  • deflecting is meant that the propagation direction of the light beam entering the shaping optics 18 is different from the direction of the light beam coming out of the shaping optics 18.
  • the shaping optics 18 comprises or is formed by a lens.
  • This lens is for example a convergent lens. It is for example configured to collimate the light rays passing through it.
  • the shaping optics 18 is for example received through a wall of the housing 12. In other words, it is fixed to the housing 12 in a receiving hole provided for this purpose and formed in a wall.
  • the wall in question is for example an upper wall of the housing 12 (in the sense of the orientation of the Figure 2 ). This wall is for example facing the closure glass 6 of the device 2.
  • the mirror module 16 is configured to receive at least a portion of the rays generated by the source 14, and to return at least a portion to the optics 18.
  • the mirror module 16 is configured to allow the selective switching on and off of different regions of the output beam F generated by the module 10.
  • the mirror module 16 is configured so that the output beam module 10 is a pixelated beam whose different regions are controllable on ignition and extinction via the mirror module 16.
  • Such a module is for example known by the acronym DMD, for "Digital Micromirror Device", which can be translated by matrix of micro-mirrors.
  • the mirror module 16 comprises a plurality of mirrors 32 and a substrate 34.
  • each mirror in the first position, is oriented so that the light rays arriving from the source 14 are reflected towards the shaping optics 18 and contribute to the output beam.
  • the mirrors in the second position, are oriented so that the light rays that reach them are reflected in a direction in which they do not contribute to the output beam.
  • the mirrors are configured to, in second position, send the light rays reflected by them towards a wall of the housing 12.
  • they are configured to send all light rays to the same wall.
  • they are configured to send the light rays to a region of the housing delimited by a plurality of walls.
  • the or at least one of the second openings is formed in a wall towards which the mirrors return the light rays when in second position.
  • the mirror module 16 comprises a control module (not shown) adapted to control the movement of each of the mirrors selectively. This module is for example reported to the substrate 34. It is for example next to the mirrors 32.
  • the substrate 34 forms a support for the mirrors.
  • the substrate is for example in the form of a flat plate. It presents for example metallized tracks for the conveyance of electrical energy to the mirrors for their displacement.
  • the mirrors are arranged projecting relative to the face of the substrate to which they are attached.
  • the mirrors are for example arranged on the substrate 34 so as to form one or more regions of mirrors. For example, they are arranged on the substrate within each region according to a matrix arrangement. Such regions are for example known as "DMD chips".
  • the substrate of the mirror module 16 is located outside the housing. It is for example arranged facing a wall of the housing 12, or in contact therewith. This wall advantageously faces the shaping optics 18. In the example of the Figure 2 it is a lower wall of the housing 12 (in the sense of the orientation of the Figure 2 ).
  • the wall in question comprises an orifice for the reception and / or the passage of the mirrors 32.
  • This orifice is for example arranged opposite the optics 18, the mirrors being in front of the optics.
  • the mirrors 32 are received in the orifice in question.
  • the module 16 is fixed relative to the housing so that the relative position of the mirrors and the optics 18 does not change over time.
  • the distance between the mirrors 32 and the shaping optics 18 is between 8 mm and 50 mm.
  • the mirror module 16 comprises a heat sink 36 adapted to dissipate heat generated at the mirror module 16 during operation of the device 2.
  • the heat sink 36 comprises a plurality of cooling fins 38 extending from a base attached to a rear face of the substrate 34. These fins extend for example opposite the wall of the housing 12 to which the mirror module 16 is coupled.
  • the cooling module 20 is configured to cool the light emission module 10.
  • the cooling module 20 is, in the context of the invention, adapted to cool the light emission module 10 by generating at least one flow of fluid flowing within the interior volume delimited by the housing 12. More specifically again, this fluid flow is configured to circulate in the interior volume between the first and second openings O1, 02.
  • the openings O1, O2 define one or a plurality of fluid flow paths within the interior volume of the housing.
  • the cooling module is thus configured to generate one or a plurality of fluid streams within this interior volume.
  • the module 20 thus generates a flow of fluid between the opening O1 and an opening O2, and another flow of fluid between the opening O1 and the other opening O2.
  • the fluid set in motion by the cooling module 20 is a gas.
  • it is air.
  • the cooling module 20 comprises at least one fan 40.
  • the fan 40 is configured to, during operation, generate a fluid flow at a fluid outlet that it has.
  • the fan 40 is an axial fan. These fans are also known as helical fans.
  • the fan comprises a propeller and blades which, by rotation about an axis, move the fluid on contact in a local direction extending substantially parallel to the axis of rotation of the helix.
  • the fan 40 is a centrifugal fan.
  • This type of fan comprises a fluid inlet, and an outlet opening through which the fluid is expelled substantially perpendicularly to the axis of rotation of a movable member of the fan.
  • centrifugal fans here include tangential fans, in which the fluid inlet is also perpendicular to the fan outlet.
  • the fan is arranged opposite the first opening O1.
  • the fluid outlet that includes the fan is arranged opposite the first opening.
  • the fan is for example fixed to the housing 12 near this opening.
  • the fan 40 is not arranged opposite the first opening O1.
  • the cooling module 20 further comprises a fluid circulation pipe fluidly connecting the fan 40 and the first opening O1. This pipe is configured for conveying the fluid set in motion by the fan 40 until the first opening O1.
  • the cooling module 20 is further configured to generate a second flow of fluid adapted to flow in contact with the source 14. More specifically, it is configured so that the second flow of fluid circulates in contact with its heat sink 28.
  • the flow of fluid flowing between the first and second openings and the second fluid flow are generated by the same fan 40 of the cooling module 20.
  • the fluid outlet of the fan 40 has a portion facing the first opening , and a portion opposite the dissipator 28 of the source 14.
  • the cooling module 20 comprises at least a first fan for generating the flow of fluid flowing within the interior volume, and at least a second separate fan of the first fan for generating the second fluid flow for cooling the source 14.
  • the cooling module 20 comprises a fan 44 arranged facing the heat sink 36 of the mirror module 16.
  • the fan 44 is configured to circulate a fluid in contact with the heat sink to improve the heat dissipation of the module. mirrors.
  • the masking element 22 is configured to prevent the output of the housing 12 via at least a second opening 02 light rays from the mirrors.
  • the masking element 22 is adapted to prevent the output via the aperture (s) 02 from the light rays reflected by the mirrors located in the second position and along an optical path between the mirror module 16 and the second aperture 02.
  • the masking element 22 is for example in the form of a blade of material.
  • This blade has any shape. For example, it is flat. Alternatively, it is curved.
  • the masking element 22 has a surface opaque to the light generated by the source 14. This surface is arranged on the optical path between the mirror module 16 and the second opening, this surface intersecting the optical path in question. so that the light rays do not reach until the second opening 02.
  • the masking element 22 extends from the wall in which the or one of the second openings 02 are made. It then forms for example a lip extending from the wall. It then extends into the interior volume 23, and / or outside the housing.
  • the masking element 22 is located away from the wall in which the or one of the second openings 22 are formed.
  • the housing 12 extends within the interior volume. It extends for example from one wall of the housing 12 to another which do not have an opening 02, where it is fixed by its ends.
  • the module comprises at least two masking elements.
  • the two masking elements delimit between them a fluid circulation channel opening out of the housing 12 via the or a second opening 02.
  • At least one flow of fluid generated by the cooling module 20 and flowing in the interior of the housing 12 flows in contact with at least one masking element 22.
  • the putting into operation of the light emitting device 2 results in the emission, by the light emitting source 14, of light rays within the interior volume delimited by the housing 12 of the light emitting module 10.
  • At least part of these light rays is sent towards the mirror module 16, whose mirrors reflect these light rays in the direction of the shaping optics or away from it as a function of the position in the mirror. which they are at the corresponding moment.
  • each mirror is for example modified over time, depending on the beam F desired at a given time.
  • the light rays reflected by the mirror module 16 away from the shaping optics 18 cause an accumulation of heat within the module 10, in particular the area of the housing towards which the mirrors reflect the light in second position.
  • the rays emitted by the source towards the walls around the mirror module 16 also contribute to this heat.
  • the cooling module 20 generates the fluid stream (s) which enter the housing through the first opening (O1) and circulate in the interior volume of the housing, possibly passing in contact with the masking element (s). come out through the second opening or openings.
  • the second fluid flow circulates in contact with the source 14.
  • the masking element or elements 22 prevent the output via the aperture (s) 02 from the light rays reflected by the mirrors arranged in the second position.
  • the invention has several advantages.
  • the presence of the cooling module makes it possible to lower the temperature of the device 2 substantially in general during its operation.
  • the heat that tends to accumulate in the housing is thus advantageously dissipated.
  • the use of the masking elements is particularly advantageous in the configurations in which the flow of fluid flows in the region of the highly heated housing by the mirrors which reflect the light away from the optical setting. form. Indeed, the presence of the second or openings then does not result in an output of light rays through these openings in the housing. Thus, it is not necessary to add to the module 10 specific external equipment to obtain an optical rendering equivalent to those of current devices.
  • the light emitting module according to the invention contributes to greatly attenuate the heat requiring the various elements of the light emitting device while not degrading the light rendering obtained.
  • the source, the mirror module and the shaping optics have been described as received in a port of a wall of the housing.
  • the light emitting source 14, the optics 18 and / or the mirror module 16 are opposite the orifice but are not arranged directly in the orifice.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Description

Le domaine de l'invention se rapporte aux dispositifs d'émission lumineuse que comprennent les véhicules automobiles et aux modules d'émission lumineuse que comprennent ces dispositifs. Certains de ces modules comprennent une source d'émission lumineuse qui est couplée à un module à miroirs comprenant une pluralité de micro-miroirs sélectivement commandables pour leur déplacement entre une position dans laquelle ils contribuent à un faisceau lumineux de sortie du dispositif, et une autre position dans laquelle ils n'y contribuent pas. Un tel module est décrit dans le document US 2014/340653 A1 .The field of the invention relates to light emitting devices that include motor vehicles and light emitting modules that include these devices. Some of these modules include a light emitting source which is coupled to a mirror module comprising a plurality of selectively controllable micromirrors for moving between a position in which they contribute to an output light beam of the device, and another position in which they do not contribute. Such a module is described in the document US 2014/340653 A1 .

Lors de son fonctionnement, ce type de module produit, outre de la lumière, de la chaleur qui tend à s'accumuler au sein du dispositif d'émission lumineuse.During its operation, this type of module produces, in addition to light, heat that tends to accumulate within the light emitting device.

Or, cette chaleur sollicite thermiquement les éléments du dispositif ainsi qui les éléments environnant, et tend à la détérioration prématurée du dispositif d'émission lumineuse de façon générale.However, this heat thermally stresses the elements of the device as well as the surrounding elements, and tends to premature deterioration of the light emitting device generally.

Afin de limiter ces problèmes, il est couramment envisagé de doter les modules d'émission de dissipateurs thermiques, comprenant par exemple des ailettes de refroidissement couplées à un élément donné.In order to limit these problems, it is commonly envisaged to provide the emission modules with heat sinks, comprising, for example, cooling fins coupled to a given element.

Toutefois, cette approche n'est pas entièrement satisfaisante, et la chaleur produite par l'utilisation d'une source d'émission lumineuse dans les dispositifs d'émission lumineuse reste un problème important.However, this approach is not entirely satisfactory, and the heat produced by the use of a light emitting source in the light emitting devices remains a significant problem.

L'invention vise à améliorer cette situation.The invention aims to improve this situation.

A cet effet, l'invention concerne un module d'émission lumineuse, notamment pour véhicule automobile, le module d'émission lumineuse comportant :

  • un boîtier délimitant un volume intérieur et comprenant au moins une première ouverture et une deuxième ouverture,
  • une optique de mise en forme adaptée pour mettre en forme des rayons lumineux pour former un faisceau de sortie du module d'émission lumineuse,
  • une source d'émission lumineuse adaptée pour émettre des rayons lumineux dans le volume intérieur,
  • un module à miroirs agencé pour recevoir au moins une partie des rayons lumineux émis par la source d'émission lumineuse, le module à miroirs comprenant une pluralité de miroirs chacun déplaçable entre une première position dans laquelle le miroir correspondant est agencé pour réfléchir des rayons lumineux lui parvenant de la source d'émission lumineuse en direction de l'optique de mise en forme, et une deuxième position dans laquelle le miroir correspondant est agencé pour réfléchir les rayons lumineux lui parvenant de la source d'émission lumineuse à l'écart de l'optique de mise en forme,
le module d'émission lumineuse comprenant en outre un module de refroidissement configuré pour générer un flux de fluide circulant au sein du volume intérieur entre les première et deuxième ouvertures pour refroidir le module d'émission lumineuse.For this purpose, the invention relates to a light emission module, in particular for a motor vehicle, the light emission module comprising:
  • a housing defining an interior volume and comprising at least a first opening and a second opening,
  • a shaping optics adapted to shape light rays to form an output beam of the light emitting module,
  • a light emission source adapted to emit light rays in the interior volume,
  • a mirror module arranged to receive at least a portion of the light rays emitted by the light emission source, the mirror module comprising a plurality of mirrors each movable between a first position in which the corresponding mirror is arranged to reflect light rays coming from the light emission source towards the shaping optics, and a second position in which the corresponding mirror is arranged to reflect the light rays coming from the light emitting source to the light source. difference in shaping optics,
the light emission module further comprising a cooling module configured to generate a flow of fluid flowing within the interior volume between the first and second openings for cooling the light emission module.

Selon l'invention, au moins une partie des miroirs sont, en deuxième position, agencés pour réfléchir les rayons lumineux leur parvenant de la source d'émission lumineuse en direction d'au moins une paroi du boîtier, la deuxième ouverture étant formée dans la paroi.According to the invention, at least a portion of the mirrors are, in second position, arranged to reflect the light rays coming from the light emission source towards at least one wall of the housing, the second opening being formed in the wall.

Selon un aspect de l'invention, le module d'émission lumineuse comprend au moins un élément de masquage agencé sur un trajet optique entre le module à miroirs et la deuxième ouverture, l'élément de masquage étant configuré pour prévenir la sortie du boîtier via la deuxième ouverture des rayons lumineux issus des miroirs et empruntant le trajet optique.According to one aspect of the invention, the light emitting module comprises at least one masking element arranged on an optical path between the mirror module and the second opening, the masking element being configured to prevent the output of the housing via the second opening of the light rays coming from the mirrors and taking the optical path.

Selon un aspect de l'invention, l'élément de masquage s'étend à partir de la paroi.According to one aspect of the invention, the masking element extends from the wall.

Selon un aspect de l'invention, le flux de fluide circule au contact de l'élément de masquage.According to one aspect of the invention, the flow of fluid flows in contact with the masking element.

Selon un aspect de l'invention, le module d'émission lumineuse comprend au moins deux éléments de masquage s'étendant à partir de la paroi, les deux éléments de masquage délimitant entre eux un canal de circulation de fluide débouchant à l'extérieur du boîtier via la deuxième ouverture.According to one aspect of the invention, the light emission module comprises at least two masking elements extending from the wall, the two masking elements delimiting between them a fluid circulation channel opening out of the wall. housing via the second opening.

Selon un aspect de l'invention, la deuxième ouverture forme une ouverture de sortie du flux de fluide du boîtier.According to one aspect of the invention, the second opening forms an outlet opening of the fluid flow of the housing.

Selon un aspect de l'invention, le boîtier comprend une pluralité de deuxièmes ouvertures, le module de refroidissement étant configuré pour générer une pluralité de flux de fluide circulant chacun entre la première ouverture et l'une des deuxièmes ouvertures.According to one aspect of the invention, the housing comprises a plurality of second openings, the cooling module being configured to generate a plurality of fluid flows each flowing between the first opening and one of the second openings.

Selon un aspect de l'invention, la source d'émission lumineuse comprend un dissipateur thermique agencé au travers du boîtier ou agencé à l'extérieur du boîtier, le module de refroidissement étant en outre configuré pour générer un deuxième flux de fluide circulant au contact du dissipateur thermique. Selon un aspect de l'invention, le module de refroidissement comprend un ventilateur.According to one aspect of the invention, the light emission source comprises a heat sink arranged through the housing or arranged outside the housing, the cooling module being further configured to generate a second flow of fluid flowing on contact heat sink. According to one aspect of the invention, the cooling module comprises a fan.

Selon un aspect de l'invention, le ventilateur est configuré pour générer simultanément le flux de fluide circulant dans le volume intérieur du boîtier et le deuxième flux de fluide circulant au contact du dissipateur thermique.According to one aspect of the invention, the fan is configured to simultaneously generate the flow of fluid flowing in the interior volume of the housing and the second flow of fluid flowing in contact with the heat sink.

Selon un aspect de l'invention, une sortie de fluide du ventilateur est agencée en regard de la première ouverture.According to one aspect of the invention, a fluid outlet of the fan is arranged opposite the first opening.

Selon un aspect de l'invention, le module de refroidissement comprend une conduite de circulation raccordant fluidiquement une sortie de fluide du ventilateur à la première ouverture.According to one aspect of the invention, the cooling module comprises a circulation line fluidly connecting a fluid outlet of the fan to the first opening.

Selon un aspect de l'invention, le ventilateur est un ventilateur axial.According to one aspect of the invention, the fan is an axial fan.

Selon un aspect de l'invention, le ventilateur est un ventilateur centrifuge.According to one aspect of the invention, the fan is a centrifugal fan.

L'invention concerne en outre un dispositif d'émission lumineuse, notamment pour véhicule automobile, comprenant un module d'émission lumineuse tel que défini ci-dessus.The invention further relates to a light emitting device, particularly for a motor vehicle, comprising a light emitting module as defined above.

Selon un aspect de l'invention, le dispositif d'émission lumineuse est un dispositif d'éclairage et/ou de signalisation de véhicule automobile.According to one aspect of the invention, the light emission device is a lighting and / or signaling device for a motor vehicle.

Selon un aspect de l'invention, le dispositif d'émission lumineuse est configuré pour mettre en oeuvre une ou plusieurs fonctions photométriques, notamment réglementées.According to one aspect of the invention, the light emitting device is configured to implement one or more photometric functions, in particular regulated.

L'invention sera mieux comprise à la lecture de la description détaillée qui va suivre, donnée uniquement à titre d'exemple et faite en référence aux figures annexées, sur lesquelles :

  • La Figure 1 est une illustration schématique d'un dispositif d'émission lumineuse selon l'invention ;
  • La Figure 2 illustre un module d'émission lumineuse selon l'invention ;
The invention will be better understood on reading the detailed description which follows, given solely by way of example and with reference to the appended figures, in which:
  • The Figure 1 is a schematic illustration of a light emitting device according to the invention;
  • The Figure 2 illustrates a light emission module according to the invention;

La Figure 1 illustre un dispositif d'émission lumineuse 2 selon l'invention, ci-après dispositif 2, configuré pour émettre de la lumière.The Figure 1 illustrates a light emitting device 2 according to the invention, hereinafter device 2, configured to emit light.

Le dispositif 2 est avantageusement un dispositif destiné à être intégré à un véhicule automobile. Autrement dit, il s'agit d'un dispositif de véhicule automobile.The device 2 is advantageously a device intended to be integrated into a motor vehicle. In other words, it is a motor vehicle device.

Avantageusement, le dispositif 2 est un dispositif d'éclairage et/ou de signalisation de véhicule automobile.Advantageously, the device 2 is a lighting and / or signaling device for a motor vehicle.

Il est par exemple configuré pour mettre en oeuvre une ou plusieurs fonctions photométriques.It is for example configured to implement one or more photometric functions.

Une fonction photométrique est par exemple une fonction d'éclairage et/ou signalisation visible pour un oeil humain. On remarque que ces fonctions photométriques peuvent faire l'objet d'une ou plusieurs règlementations établissant des exigences de colorimétrie, d'intensité, de répartition spatiale selon une grille dite photométrique, ou encore de plages de visibilité de la lumière émise.A photometric function is for example a lighting function and / or visible signaling for a human eye. Note that these photometric functions may be subject to one or more regulations establishing colorimetry, intensity, spatial distribution requirements according to a so-called photometric grid, or ranges of visibility of the light emitted.

Le dispositif 2 est par exemple un dispositif d'éclairage et constitue alors un projecteur - ou phare avant - de véhicule. Il est alors configuré pour mettre en oeuvre une ou plusieurs fonctions photométriques par exemple choisie(s) parmi une fonction de feux de croisement dite « fonction code » (réglementations 87 et 123 UNECE), une fonction de feux de position (réglementation 007 UNECE), une fonction de feux de route dite « fonction route » (réglementation 123 UNECE), une fonction antibrouillard (réglementations 019 et 038 UNECE).The device 2 is for example a lighting device and is then a projector - or headlight - vehicle. It is then configured to implement one or more photometric functions for example chosen (s) from a low beam function called "code function" (regulations 87 and 123 UNECE), a function of position lights (007 UNECE regulation) , a high beam function called "road function" (regulation 123 UNECE), an anti-fog function (regulations 019 and 038 UNECE).

Alternativement ou parallèlement, le dispositif est un dispositif de signalisation destiné à être agencé à l'avant ou à l'arrière du véhicule.Alternatively or in parallel, the device is a signaling device intended to be arranged at the front or rear of the vehicle.

Lorsqu'il est destiné à être agencé à l'avant, ces fonctions photométriques incluent une fonction d'indication de changement de direction (réglementation 006 UNECE), une fonction d'éclairage diurne connue sous l'acronyme anglophone DRL (réglementation 087 UNECE), pour « Daytime Running Light », une fonction de signature lumineuse avant.When intended to be arranged in the front, these photometric functions include a function of indication of change of direction (regulation 006 UNECE), a daytime running function known by the acronym DRL (regulation 087 UNECE) , for "Daytime Running Light", a front light signature function.

Lorsqu'il est destiné à être agencé à l'arrière, ces fonctions photométriques incluent une fonction d'indication de recul (réglementation 023 UNECE), une fonction stop (réglementation 007 UNECE), une fonction antibrouillard (réglementations 019 et 038 UNECE), une fonction d'indication de changement de direction (réglementation 006 UNECE), une fonction de signature lumineuse arrière.When intended to be arranged at the rear, these photometric functions include a function of indication of recoil (regulation 023 UNECE), a function stop (regulation 007 UNECE), a function of fog (regulations 019 and 038 UNECE), a direction change indication function (006 UNECE regulation), a backlight signature function.

Alternativement, le dispositif 2 est prévu pour l'éclairage de l'habitacle d'un véhicule et est alors destiné à émettre de la lumière principalement dans l'habitacle du véhicule.Alternatively, the device 2 is provided for lighting the passenger compartment of a vehicle and is then intended to emit light mainly in the passenger compartment of the vehicle.

Dans ce qui suit, le dispositif 2 est décrit de manière non limitative dans une configuration dans laquelle il est destiné à émettre de la lumière à l'extérieur du véhicule.In the following, the device 2 is described in a non-limiting manner in a configuration in which it is intended to emit light outside the vehicle.

En référence à la Figure 1, le dispositif 2 comprend une enveloppe 4 et une glace de fermeture 6 coopérant l'une avec l'autre pour délimiter intérieurement une cavité 8.With reference to the Figure 1 , the device 2 comprises an envelope 4 and a closure glass 6 cooperating with one another to internally delimit a cavity 8.

Le dispositif 2 comprend en outre un module d'émission lumineuse 10 selon l'invention, ci-après module 10, agencé en tout ou partie dans la cavité 8.The device 2 further comprises a light emitting module 10 according to the invention, hereinafter module 10, arranged wholly or partly in the cavity 8.

En référence à la Figure 2, le module 10 est configuré pour générer un faisceau lumineux F. Par exemple, dans l'exemple de la Figure 1, il est agencé pour émettre ce faisceau lumineux en direction de la glace de fermeture (qui est transparente pour au moins une partie du faisceau lumineux F).With reference to the Figure 2 , the module 10 is configured to generate a light beam F. For example, in the example of the Figure 1 , it is arranged to emit this light beam towards the closure glass (which is transparent for at least a portion of the light beam F).

Le module d'émission lumineuse 10 comprend un boîtier 12, une source d'émission lumineuse 14, un module à miroirs 16, une optique de mise en forme 18 et un module de refroidissement 20. Avantageusement, le module d'émission lumineuse 2 comprend en outre au moins un élément de masquage 22.The light emission module 10 comprises a housing 12, a light emitting source 14, a mirror module 16, a shaping optics 18 and a cooling module 20. Advantageously, the light emitting module 2 comprises in addition, at least one masking element 22.

Le boîtier 12 est configuré pour héberger au moins une partie des éléments du module.The housing 12 is configured to host at least a portion of the elements of the module.

Le boîtier 12 est avantageusement rigide. Il présente par exemple une forme générale parallélépipédique. Toutefois, alternativement, il présente une forme quelconque.The housing 12 is advantageously rigid. It presents for example a parallelepipedic general shape. However, alternatively, it has any shape.

Il est par exemple réalisé à partir de polycarbonate (d'acronyme PC) opaque. Alternativement, le boîtier 12 est par exemple réalisé à partir d'aluminium.It is for example made from polycarbonate (of acronym PC) opaque. Alternatively, the housing 12 is for example made from aluminum.

Le boîtier 12 comprend des parois qui délimitent conjointement un volume intérieur 23 du boîtier.The housing 12 includes walls which jointly delimit an interior volume 23 of the housing.

Le boîtier 12 comprend en outre au moins une première ouverture O1 et une deuxième ouverture 02. Ces ouvertures sont ménagées dans une ou plusieurs parois du boîtier. Les ouvertures sont avantageusement ménagées dans des parois distinctes.The housing 12 further comprises at least a first opening O1 and a second opening 02. These openings are formed in one or more walls of the housing. The openings are advantageously formed in separate walls.

Les première et deuxième ouvertures O1, 02 forment une ouverture d'entrée d'un flux de fluide destiné à circuler dans le volume intérieur et décrit ci-après, respectivement une ouverture de sortie du flux de fluide.The first and second openings O1, 02 form an inlet opening of a fluid flow intended to circulate in the interior volume and described below, respectively an outlet opening of the fluid flow.

Par exemple, la première ouverture est ménagée dans une paroi latérale du boîtier. En outre, la deuxième ouverture est par exemple ménagée dans une autre paroi latérale du boîtier. Par exemple, ces parois latérales sont en regard l'une de l'autre.For example, the first opening is formed in a side wall of the housing. In addition, the second opening is for example made in another side wall of the housing. For example, these side walls are facing each other.

On remarque qu'en variante, les ouvertures O1, 02 sont ménagées dans une même paroi.Note that, alternatively, the openings O1, 02 are formed in the same wall.

Dans certaines réalisations, le boîtier 12 comprend plus d'une première ouverture O1, et/ou plus d'une deuxième ouverture. Dans l'exemple de la Figure 2, le boîtier comprend une ouverture O1, et une pluralité d'ouvertures 02.In some embodiments, the housing 12 includes more than one first opening O1, and / or more than one second opening. In the example of the Figure 2 , the housing comprises an opening O1, and a plurality of openings 02.

La source d'émission lumineuse 14, ci-après source 14, forme le coeur d'émission de lumière du module 10. Autrement dit, elle est adaptée pour émettre des rayons lumineux au sein du module d'émission lumineuse.The light emitting source 14, hereinafter source 14, forms the light-emitting core of the module 10. In other words, it is adapted to emit light rays within the light emitting module.

La source d'émission lumineuse 14 comprend un élément photoémissif 24 adapté pour émettre des rayons lumineux, une optique 25 et un substrat 26 sur lequel l'élément photoémissif est agencé.The light emitting source 14 comprises a light emitting element 24 adapted to emit light rays, an optics 25 and a substrate 26 on which the light emitting element is arranged.

L'élément photoémissif 24 est par exemple une diode électroluminescente configurée pour générer des rayons lumineux lorsqu'elle est alimentée en énergie électrique. Par exemple, l'élément photoémissif 24 est configuré pour générer des rayons lumineux de couleur blanche.The light emitting element 24 is for example a light-emitting diode configured to generate light rays when it is supplied with electrical energy. For example, the photoemissive element 24 is configured to generate white light rays.

L'optique 25 est configurée pour mettre en forme au moins une partie des rayons lumineux issus de l'élément photoémissif 24. Ici, l'optique 25 est plus spécifiquement configurée pour mettre en forme les rayons lumineux émis par l'élément photoémissif 24 de sorte que la majeure partie de ces rayons parviennent au module à miroirs 16. Avantageusement, sensiblement l'intégralité des rayons lumineux mis en forme par l'optique 25 parvient au module à miroirs.The optics 25 is configured to shape at least a portion of the light rays coming from the light emitting element 24. Here, the optics 25 is more specifically configured to shape the light rays emitted by the light emitting element 24 of so that most of these rays 16 Advantageously, substantially all the light rays formed by the optical 25 reaches the mirror module.

Par exemple, l'optique de mise en forme 25 comprend ou est formée par une lentille.For example, the shaping optics 25 comprises or is formed by a lens.

L'optique de mise en forme 25 est agencée en regard de l'élément photoémissif 24. Par exemple, elle est fixe par rapport à la source d'émission lumineuse 14.The shaping optics 25 is arranged facing the light emitting element 24. For example, it is fixed with respect to the light emitting source 14.

Le substrat 26 est forme un support pour l'élément photoémissif. En outre, il est configuré pour alimenter l'élément photoémissif 24 en énergie électrique pour la génération de rayons lumineux par celui-ci. Le substrat 26 comprend ou se présente sous la forme d'un circuit imprimé, connu sous l'acronyme anglophone PCB pour « Printed Circuit Board ».The substrate 26 is a support for the photoemissive element. In addition, it is configured to supply the photoemissive element 24 with electrical energy for the generation of light rays by it. The substrate 26 comprises or is in the form of a printed circuit, known by the acronym PCB for "Printed Circuit Board".

Optionnellement, la source 14 comprend en outre un dissipateur thermique 28 couplé thermiquement au substrat 26 et configuré pour dissiper de la chaleur générée par la source 14 lors de son fonctionnement.Optionally, the source 14 further comprises a heat sink 28 thermally coupled to the substrate 26 and configured to dissipate heat generated by the source 14 during its operation.

Par exemple, le dissipateur thermique 28 comprend une pluralité d'ailettes de refroidissement 30 s'étendant à partir d'une embase du dissipateur rapportée à une face arrière du substrat 26.For example, the heat sink 28 comprises a plurality of cooling fins 30 extending from a base of the dissipator attached to a rear face of the substrate 26.

On remarque que la source peut comprendre un module de commande (non représenté) adapté pour commander le substrat et l'élément photoémissif pour l'allumage et l'extinction de celui-ci.Note that the source may include a control module (not shown) adapted to control the substrate and the photoemissive element for switching on and off thereof.

La source 14 est agencée en tout ou partie dans un orifice de réception ménagée dans une paroi du boîtier 12. Autrement dit, la source 14 est fixée au travers d'une paroi du boîtier 12 en tout ou partie. Alternativement ou parallèlement, elle est agencée en vis-à-vis de cet orifice. Ici, par « en vis-à-vis », on entend qu'au moins une partie de la source est visible à travers l'orifice sous une direction d'observation faisant face à l'orifice. Dans l'exemple de la Figure 2, la source 14 est agencée en vis-à-vis de cet orifice, le dissipateur étant en partie reçu à travers l'orifice.The source 14 is arranged wholly or partly in a receiving orifice formed in a wall of the housing 12. In other words, the source 14 is fixed through a wall of the housing 12 in all or part. Alternatively or in parallel, it is arranged vis-à-vis this orifice. Here, by "vis-à-vis" is meant that at least a portion of the source is visible through the orifice in an observation direction facing the orifice. In the example of the Figure 2 , the source 14 is arranged vis-à-vis this orifice, the dissipator being partly received through the orifice.

En outre, la source d'émission lumineuse 14 est agencée pour émettre au moins une partie de ses rayons lumineux en direction du module à miroirs 16. Avantageusement, elle est agencée pour que la majeure partie des rayons qu'elle émet parvienne jusqu'au module à miroirs 16. En pratique, la source 14 présente une direction d'émission privilégiée orientée en direction du module à miroirs 16.In addition, the light emitting source 14 is arranged to emit at least a portion of its light rays towards the mirror module 16. Advantageously, it is arranged so that the majority of the rays it emits reach up to mirror module 16. In practice, the source 14 has a preferred transmission direction oriented towards the mirror module 16.

L'optique de mise en forme 18 est configurée pour dévier au moins une partie des rayons lumineux issus de la source 14 pour former le faisceau F du module d'émission lumineuse 10. Comme décrit ci-après, les rayons qui lui parviennent sont principalement issus d'une réflexion opérée par le module à miroirs 16.The shaping optics 18 is configured to deflect at least a portion of the light rays from the source 14 to form the beam F of the light emitting module 10. As described below, the rays that reach it are mainly from a reflection made by the mirror module 16.

On entend par « dévier » que la direction de propagation du rayon lumineux entrant dans l'optique de mise en forme 18 est différente de la direction du rayon lumineux sortant de l'optique de mise en forme 18.By "deflecting" is meant that the propagation direction of the light beam entering the shaping optics 18 is different from the direction of the light beam coming out of the shaping optics 18.

Par exemple, l'optique de mise en forme 18 comprend ou est formée par une lentille. Cette lentille est par exemple une lentille convergente. Elle est par exemple configurée pour collimater les rayons lumineux passant par elle.For example, the shaping optics 18 comprises or is formed by a lens. This lens is for example a convergent lens. It is for example configured to collimate the light rays passing through it.

L'optique de mise en forme 18 est par exemple reçue au travers d'une paroi du boîtier 12. Autrement dit, elle est fixée au boitier 12 au sein d'un orifice de réception prévu à cet effet et ménagé dans une paroi. La paroi en question est par exemple une paroi supérieure du boîtier 12 (au sens de l'orientation de la Figure 2). Cette paroi fait par exemple face à la glace de fermeture 6 du dispositif 2.The shaping optics 18 is for example received through a wall of the housing 12. In other words, it is fixed to the housing 12 in a receiving hole provided for this purpose and formed in a wall. The wall in question is for example an upper wall of the housing 12 (in the sense of the orientation of the Figure 2 ). This wall is for example facing the closure glass 6 of the device 2.

Le module à miroirs 16 est configuré pour recevoir au moins une partie des rayons générés par la source 14, et pour en renvoyer au moins une partie vers l'optique 18.The mirror module 16 is configured to receive at least a portion of the rays generated by the source 14, and to return at least a portion to the optics 18.

Plus spécifiquement, le module à miroirs 16 est configuré pour autoriser l'allumage et l'extinction sélectives de différentes régions du faisceau de sortie F généré par le module 10. Autrement dit, le module à miroirs 16 est configuré pour que le faisceau de sortie du module 10 soit un faisceau pixellisé dont les différentes régions sont commandables à l'allumage et à l'extinction par l'intermédiaire du module à miroirs 16.More specifically, the mirror module 16 is configured to allow the selective switching on and off of different regions of the output beam F generated by the module 10. In other words, the mirror module 16 is configured so that the output beam module 10 is a pixelated beam whose different regions are controllable on ignition and extinction via the mirror module 16.

Un tel module est par exemple connu sous l'acronyme anglophone DMD, pour « Digital Micromirror Device », qui peut se traduire par matrice de micro-miroirs.Such a module is for example known by the acronym DMD, for "Digital Micromirror Device", which can be translated by matrix of micro-mirrors.

Le module à miroirs 16 comprend une pluralité de miroirs 32 et un substrat 34.The mirror module 16 comprises a plurality of mirrors 32 and a substrate 34.

Chaque miroir 32 est sélectivement déplaçable. Autrement dit, chaque miroir est déplaçable indépendamment des autres miroirs. En outre, chaque miroir est adapté pour se déplacer entre au moins deux positions :

  • une première position dans laquelle le miroir est agencé pour réfléchir les rayons lumineux lui parvenant de la source d'émission lumineuse 14 en direction de l'optique de mise en forme 18,
  • une deuxième position dans laquelle le miroir est agencé pour réfléchir les rayons lumineux lui parvenant de la source d'émission lumineuse 14 à l'écart de l'optique de mise en forme 18.
Each mirror 32 is selectively movable. In other words, each mirror is movable independently of other mirrors. In addition, each mirror is adapted to move between at least two positions:
  • a first position in which the mirror is arranged to reflect the light rays reaching it from the light emission source 14 towards the shaping optics 18,
  • a second position in which the mirror is arranged to reflect the light rays coming from the light emission source 14 away from the shaping optics 18.

En pratique, dans la première position, chaque miroir est orienté de sorte que les rayons lumineux qui leur parviennent de la source 14 soient réfléchis en direction de l'optique de mise en forme 18 et contribuent au faisceau de sortie. En outre, dans la deuxième position, les miroirs sont orientés pour que les rayons lumineux qui leur parviennent soient réfléchis dans une direction dans laquelle ils ne contribuent pas au faisceau de sortie.In practice, in the first position, each mirror is oriented so that the light rays arriving from the source 14 are reflected towards the shaping optics 18 and contribute to the output beam. In addition, in the second position, the mirrors are oriented so that the light rays that reach them are reflected in a direction in which they do not contribute to the output beam.

Par exemple, les miroirs sont configurés pour, en deuxième position, envoyer les rayons lumineux réfléchis par eux en direction d'une paroi du boîtier 12. Par exemple, ils sont configurés pour tous envoyer les rayons lumineux vers une même paroi. Alternativement, ils sont configurés pour envoyer les rayons lumineux vers une région du boîtier délimitée par une pluralité de parois. On remarque qu'avantageusement, la ou au moins une des deuxièmes ouvertures est ménagée dans une paroi vers laquelle les miroirs renvoient les rayons lumineux lorsqu'en deuxième position.For example, the mirrors are configured to, in second position, send the light rays reflected by them towards a wall of the housing 12. For example, they are configured to send all light rays to the same wall. Alternatively, they are configured to send the light rays to a region of the housing delimited by a plurality of walls. It is noted that advantageously, the or at least one of the second openings is formed in a wall towards which the mirrors return the light rays when in second position.

Le module à miroirs 16 comprend un module de commande (non représenté) adapté pour commander le déplacement de chacun des miroirs de manière sélective. Ce module est par exemple rapporté au substrat 34. Il se situe par exemple à côté des miroirs 32.The mirror module 16 comprises a control module (not shown) adapted to control the movement of each of the mirrors selectively. This module is for example reported to the substrate 34. It is for example next to the mirrors 32.

Le substrat 34 forme un support pour les miroirs. Le substrat se présente par exemple sous la forme d'une plaque plane. Il présente par exemple des pistes métallisées pour l'acheminement d'énergie électrique aux miroirs pour leur mise en déplacement.The substrate 34 forms a support for the mirrors. The substrate is for example in the form of a flat plate. It presents for example metallized tracks for the conveyance of electrical energy to the mirrors for their displacement.

Les miroirs sont agencés en saillie relativement à la face du substrat à laquelle ils sont rapportés. Les miroirs sont par exemple agencés sur le substrat 34 de façon à former une ou plusieurs régions de miroirs. Par exemple, ils sont arrangés sur le substrat au sein de chaque région selon un agencement matriciel. De telles régions sont par exemple connues sous le nom de « puces DMD ».The mirrors are arranged projecting relative to the face of the substrate to which they are attached. The mirrors are for example arranged on the substrate 34 so as to form one or more regions of mirrors. For example, they are arranged on the substrate within each region according to a matrix arrangement. Such regions are for example known as "DMD chips".

Avantageusement, le substrat du module à miroirs 16 est situé à l'extérieur du boîtier. Il est par exemple agencé en regard d'une paroi du boîtier 12, ou au contact de celle-ci. Cette paroi fait avantageusement face à l'optique de mise en forme 18. Dans l'exemple de la Figure 2, il s'agit d'une paroi inférieure du boîtier 12 (au sens de l'orientation de la Figure 2).Advantageously, the substrate of the mirror module 16 is located outside the housing. It is for example arranged facing a wall of the housing 12, or in contact therewith. This wall advantageously faces the shaping optics 18. In the example of the Figure 2 it is a lower wall of the housing 12 (in the sense of the orientation of the Figure 2 ).

La paroi en question comprend un orifice pour la réception et/ou le passage des miroirs 32. Cet orifice est par exemple agencé en regard de l'optique 18, les miroirs étant en face de l'optique. Par exemple, comme illustré en Figure 2, les miroirs 32 sont reçus dans l'orifice en question.The wall in question comprises an orifice for the reception and / or the passage of the mirrors 32. This orifice is for example arranged opposite the optics 18, the mirrors being in front of the optics. For example, as illustrated in Figure 2 the mirrors 32 are received in the orifice in question.

Préférentiellement, le module 16 est fixe par rapport au boîtier de sorte que la position relative des miroirs et de l'optique 18 ne change pas au cours du temps. Avantageusement, la distance entre les miroirs 32 et l'optique de mise en forme 18 est comprise entre 8 mm et 50 mm.Preferably, the module 16 is fixed relative to the housing so that the relative position of the mirrors and the optics 18 does not change over time. Advantageously, the distance between the mirrors 32 and the shaping optics 18 is between 8 mm and 50 mm.

Optionnellement, le module à miroirs 16 comprend un dissipateur thermique 36 adapté pour dissiper de la chaleur générée au niveau du module à miroirs 16 lors du fonctionnement du dispositif 2.Optionally, the mirror module 16 comprises a heat sink 36 adapted to dissipate heat generated at the mirror module 16 during operation of the device 2.

Par exemple, le dissipateur thermique 36 comprend une pluralité d'ailettes de refroidissement 38 s'étendant à partir d'une embase fixée à une face arrière du substrat 34. Ces ailettes s'étendent par exemple à l'opposé de la paroi du boîtier 12 à laquelle le module à miroirs 16 est couplé.For example, the heat sink 36 comprises a plurality of cooling fins 38 extending from a base attached to a rear face of the substrate 34. These fins extend for example opposite the wall of the housing 12 to which the mirror module 16 is coupled.

Le module de refroidissement 20 est configuré pour refroidir le module d'émission lumineuse 10.The cooling module 20 is configured to cool the light emission module 10.

Plus spécifiquement, le module de refroidissement 20 est, dans le contexte de l'invention, adapté pour refroidir le module d'émission lumineuse 10 en générant au moins un flux de fluide circulant au sein du volume intérieur délimité par le boîtier 12. Plus spécifiquement encore, ce flux de fluide est configuré pour circuler dans le volume intérieur entre les première et deuxième ouvertures O1, 02.More specifically, the cooling module 20 is, in the context of the invention, adapted to cool the light emission module 10 by generating at least one flow of fluid flowing within the interior volume delimited by the housing 12. More specifically again, this fluid flow is configured to circulate in the interior volume between the first and second openings O1, 02.

En pratique, en fonction de leur nombre, les ouvertures O1, 02 définissent une ou une pluralité de voies de circulation de fluide au sein du volume intérieur du boîtier. Le module de refroidissement est ainsi configuré pour générer un ou une pluralité de flux de fluides au sein de ce volume intérieur. Dans l'exemple de la Figure 2, le module 20 génère ainsi un flux de fluide entre l'ouverture O1 et une ouverture 02, et un autre flux de fluide entre l'ouverture O1 et l'autre ouverture 02.In practice, depending on their number, the openings O1, O2 define one or a plurality of fluid flow paths within the interior volume of the housing. The cooling module is thus configured to generate one or a plurality of fluid streams within this interior volume. In the example of the Figure 2 the module 20 thus generates a flow of fluid between the opening O1 and an opening O2, and another flow of fluid between the opening O1 and the other opening O2.

Préférentiellement, le fluide mis en mouvement par le module de refroidissement 20 est un gaz. Avantageusement, il s'agit d'air.Preferably, the fluid set in motion by the cooling module 20 is a gas. Advantageously, it is air.

Le module de refroidissement 20 comprend au moins un ventilateur 40. Le ventilateur 40 est configuré pour, lors de fonctionnement, générer un flux de fluide au niveau d'une sortie de fluide qu'il présente.The cooling module 20 comprises at least one fan 40. The fan 40 is configured to, during operation, generate a fluid flow at a fluid outlet that it has.

Par exemple, le ventilateur 40 est un ventilateur axial. Ces ventilateurs sont également connus sous le nom de ventilateurs hélicoïdaux. Autrement dit, le ventilateur comprend une hélice et des aubes qui, par rotation autour d'un axe, mettent en mouvement le fluide à leur contact selon une direction locale s'étendant sensiblement parallèlement à l'axe de rotation de l'hélice.For example, the fan 40 is an axial fan. These fans are also known as helical fans. In other words, the fan comprises a propeller and blades which, by rotation about an axis, move the fluid on contact in a local direction extending substantially parallel to the axis of rotation of the helix.

Toutefois, alternativement, le ventilateur 40 est un ventilateur centrifuge. Ce type de ventilateur comprend une admission de fluide, et une ouverture de sortie via laquelle le fluide est expulsé sensiblement perpendiculairement à l'axe de rotation d'un élément mobile du ventilateur. On remarque que les ventilateurs centrifuges incluent ici les ventilateurs tangentiels, dans lesquels l'admission de fluide est également perpendiculaire à la sortie du ventilateur.However, alternatively, the fan 40 is a centrifugal fan. This type of fan comprises a fluid inlet, and an outlet opening through which the fluid is expelled substantially perpendicularly to the axis of rotation of a movable member of the fan. Note that centrifugal fans here include tangential fans, in which the fluid inlet is also perpendicular to the fan outlet.

Avantageusement, le ventilateur est agencé en regard de la première ouverture O1. Autrement dit, la sortie de fluide que comprend le ventilateur est agencée en regard de la première ouverture. A cet effet, le ventilateur est par exemple fixé au boîtier 12 aux abords de cette ouverture.Advantageously, the fan is arranged opposite the first opening O1. In other words, the fluid outlet that includes the fan is arranged opposite the first opening. For this purpose, the fan is for example fixed to the housing 12 near this opening.

Toutefois, alternativement, le ventilateur 40 n'est pas agencé en regard de la première ouverture O1. Par exemple, il est alors déporté du boîtier 12. Avantageusement, dans cette configuration, le module de refroidissement 20 comprend en outre une conduite de circulation de fluide connectant fluidiquement le ventilateur 40 et la première ouverture O1. Cette conduite est configurée pour l'acheminement du fluide mis en mouvement par le ventilateur 40 jusqu'à la première ouverture O1.However, alternatively, the fan 40 is not arranged opposite the first opening O1. For example, it is then deported from the housing 12. Advantageously, in this configuration, the cooling module 20 further comprises a fluid circulation pipe fluidly connecting the fan 40 and the first opening O1. This pipe is configured for conveying the fluid set in motion by the fan 40 until the first opening O1.

Dans le contexte de l'invention, avantageusement, le module de refroidissement 20 est en outre configuré pour générer un deuxième flux de fluide adapté pour circuler au contact de la source d'émission lumineuse 14. Plus spécifiquement, il est configuré pour que le deuxième flux de fluide circule au contact de son dissipateur thermique 28.In the context of the invention, advantageously, the cooling module 20 is further configured to generate a second flow of fluid adapted to flow in contact with the source 14. More specifically, it is configured so that the second flow of fluid circulates in contact with its heat sink 28.

Plusieurs réalisations sont alors envisageables.Several achievements are then possible.

Dans une réalisation illustrée en Figure 2, le flux de fluide circulant entre les première et deuxième ouvertures et le deuxième flux de fluide sont générés par le même ventilateur 40 du module de refroidissement 20. Par exemple, la sortie de fluide du ventilateur 40 présente une portion en regard de la première ouverture, et une portion en regard du dissipateur 28 de la source 14.In an embodiment illustrated in Figure 2 , the flow of fluid flowing between the first and second openings and the second fluid flow are generated by the same fan 40 of the cooling module 20. For example, the fluid outlet of the fan 40 has a portion facing the first opening , and a portion opposite the dissipator 28 of the source 14.

Alternativement, le module de refroidissement 20 comprend au moins un premier ventilateur pour générer le flux de fluide circulant au sein du volume intérieur, et au moins un deuxième ventilateur distinct du premier ventilateur pour générer le deuxième flux de fluide pour refroidir la source 14.Alternatively, the cooling module 20 comprises at least a first fan for generating the flow of fluid flowing within the interior volume, and at least a second separate fan of the first fan for generating the second fluid flow for cooling the source 14.

Optionnellement et comme représenté sur la Figure 2, le module de refroidissement 20 comprend un ventilateur 44 agencé en regard du dissipateur thermique 36 du module à miroirs 16. Le ventilateur 44 est configuré pour faire circuler un fluide au contact de ce dissipateur thermique pour améliorer l'évacuation de la chaleur du module à miroirs.Optionally and as shown on the Figure 2 , the cooling module 20 comprises a fan 44 arranged facing the heat sink 36 of the mirror module 16. The fan 44 is configured to circulate a fluid in contact with the heat sink to improve the heat dissipation of the module. mirrors.

L'élément de masquage 22 est configuré pour prévenir la sortie du boîtier 12 via au moins une deuxième ouverture 02 des rayons lumineux issus des miroirs.The masking element 22 is configured to prevent the output of the housing 12 via at least a second opening 02 light rays from the mirrors.

Plus spécifiquement, l'élément de masquage 22 est adapté pour empêcher la sortie via la ou les ouvertures 02 des rayons lumineux réfléchis par les miroirs se trouvant en deuxième position et suivant un trajet optique entre le module à miroirs 16 et la deuxième ouverture 02.More specifically, the masking element 22 is adapted to prevent the output via the aperture (s) 02 from the light rays reflected by the mirrors located in the second position and along an optical path between the mirror module 16 and the second aperture 02.

L'élément de masquage 22 se présente par exemple sous la forme d'une lame de matière. Cette lame présente une forme quelconque. Par exemple, elle est plane. Alternativement, elle est courbe.The masking element 22 is for example in the form of a blade of material. This blade has any shape. For example, it is flat. Alternatively, it is curved.

De façon générale, l'élément de masquage 22 présente une surface opaque à la lumière générée par la source 14. Cette surface est agencée sur le trajet optique entre le module à miroirs 16 et la deuxième ouverture, cette surface intersectant le trajet optique en question de sorte que les rayons lumineux ne parviennent pas jusqu'à la deuxième ouverture 02.In general, the masking element 22 has a surface opaque to the light generated by the source 14. This surface is arranged on the optical path between the mirror module 16 and the second opening, this surface intersecting the optical path in question. so that the light rays do not reach until the second opening 02.

Plusieurs configurations sont envisageables pour l'élément de masquage 22.Several configurations are possible for the masking element 22.

Dans la configuration de la Figure 2, l'élément de masquage 22 s'étend à partir de la paroi dans laquelle la ou une des deuxièmes ouvertures 02 sont réalisées. Elle forme alors par exemple une lèvre s'étendant à partir de la paroi. Elle s'étend alors dans le volume intérieur 23, et/ou à l'extérieur du boîtier.In the configuration of the Figure 2 , the masking element 22 extends from the wall in which the or one of the second openings 02 are made. It then forms for example a lip extending from the wall. It then extends into the interior volume 23, and / or outside the housing.

Dans une configuration alternative (illustrée en pointillés sur la Figure 2), l'élément de masquage 22 se situe à l'écart de la paroi dans laquelle la ou une des deuxièmes ouvertures 22 sont ménagées.In an alternative configuration (shown in dotted lines on the Figure 2 ), the masking element 22 is located away from the wall in which the or one of the second openings 22 are formed.

Par exemple, elle s'étend au sein du volume intérieur. Elle s'étend par exemple d'une paroi du boîtier 12 à une autre qui ne portent pas d'ouverture 02, où elle est fixée par ses extrémités.For example, it extends within the interior volume. It extends for example from one wall of the housing 12 to another which do not have an opening 02, where it is fixed by its ends.

Avantageusement, et comme illustré en Figure 2, le module comprend au moins deux éléments de masquage.Advantageously, and as illustrated in Figure 2 , the module comprises at least two masking elements.

Par exemple, ils s'étendent tous deux à partir d'une paroi du boîtier. Les deux éléments de masquage délimitent entre eux un canal de circulation de fluide débouchant à l'extérieur du boîtier 12 via la ou une deuxième ouverture 02.For example, they both extend from a wall of the housing. The two masking elements delimit between them a fluid circulation channel opening out of the housing 12 via the or a second opening 02.

Quelle que soit la configuration envisagée, avantageusement, au moins un flux de fluide généré par le module de refroidissement 20 et circulant dans le volume intérieur du boîtier 12 circule au contact d'au moins un élément de masquage 22.Whatever the configuration envisaged, advantageously at least one flow of fluid generated by the cooling module 20 and flowing in the interior of the housing 12 flows in contact with at least one masking element 22.

Le fonctionnement du module d'émission lumineuse 10 selon l'invention va maintenant être décrit en référence aux figures, notamment la Figure 2.The operation of the light emitting module 10 according to the invention will now be described with reference to the figures, especially the Figure 2 .

La mise en fonctionnement du dispositif d'émission lumineuse 2 se traduit par l'émission, par la source d'émission lumineuse 14, de rayons lumineux au sein du volume intérieur délimité par le boîtier 12 du module d'émission lumineuse 10.The putting into operation of the light emitting device 2 results in the emission, by the light emitting source 14, of light rays within the interior volume delimited by the housing 12 of the light emitting module 10.

Au moins une partie de ces rayons lumineux est envoyée en direction du module à miroirs 16, dont les miroirs réfléchissent ces rayons lumineux en direction de l'optique de mise en forme ou à l'écart de celle-ci en fonction de la position dans laquelle ils se trouvent à l'instant correspondant.At least part of these light rays is sent towards the mirror module 16, whose mirrors reflect these light rays in the direction of the shaping optics or away from it as a function of the position in the mirror. which they are at the corresponding moment.

La position de chaque miroir est par exemple modifiée au cours du temps, en fonction du faisceau F souhaité à un instant donné.The position of each mirror is for example modified over time, depending on the beam F desired at a given time.

Les rayons lumineux réfléchis par le module à miroirs 16 à l'écart de l'optique de mise en forme 18 entrainent une accumulation de chaleur au sein du module 10, en particulier de la zone du boîtier vers laquelle les miroirs réfléchissent la lumière en deuxième position. En outre, les rayons émis par la source en direction des parois autour du module à miroirs 16 contribuent également à cette chaleur.The light rays reflected by the mirror module 16 away from the shaping optics 18 cause an accumulation of heat within the module 10, in particular the area of the housing towards which the mirrors reflect the light in second position. In addition, the rays emitted by the source towards the walls around the mirror module 16 also contribute to this heat.

Parallèlement, le module de refroidissement 20 génère le ou les flux de fluide, qui pénètrent dans le boîtier par la première ouverture O1 et circulent dans le volume intérieur du boîtier en passant éventuellement au contact du ou des éléments de masquage 22. Ce ou ces flux ressortent par la ou les deuxièmes ouvertures.At the same time, the cooling module 20 generates the fluid stream (s) which enter the housing through the first opening (O1) and circulate in the interior volume of the housing, possibly passing in contact with the masking element (s). come out through the second opening or openings.

En outre, le deuxième flux de fluide circule au contact de la source 14.In addition, the second fluid flow circulates in contact with the source 14.

Parallèlement encore, le ou les éléments de masquage 22 préviennent la sortie via la ou les ouvertures 02 des rayons lumineux réfléchis par les miroirs agencés en deuxième position.At the same time, the masking element or elements 22 prevent the output via the aperture (s) 02 from the light rays reflected by the mirrors arranged in the second position.

L'invention présente plusieurs avantages.The invention has several advantages.

Tout d'abord, la présence du module de refroidissement permet d'abaisser substantiellement la température du dispositif 2 de manière générale lors de son fonctionnement.First of all, the presence of the cooling module makes it possible to lower the temperature of the device 2 substantially in general during its operation.

Cet effet est d'autant plus marqué lorsque le module de refroidissement génère, outre le flux de fluide, le deuxième flux de fluide dirigé vers la source 14.This effect is even more marked when the cooling module generates, in addition to the fluid flow, the second flow of fluid directed towards the source 14.

Ainsi, la chaleur qui tend à s'accumuler dans le boîtier, notamment aux abords du module à miroirs du fait de la directivité imparfaite de la source de lumière vers le module 16 et dans la région du boîtier vers laquelle les miroirs réfléchissent la lumière en deuxième position, est ainsi avantageusement dissipée.Thus, the heat that tends to accumulate in the housing, especially in the vicinity of the mirror module due to the imperfect directivity of the light source to the module 16 and in the region of the housing to which the mirrors reflect light in second position, is thus advantageously dissipated.

D'autre part, l'utilisation des éléments de masquage est particulièrement avantageuse dans les configurations dans lesquelles le flux de fluide circule dans la région du boîtier fortement chauffée par les miroirs qui réfléchissent la lumière à l'écart de l'optique de mise en forme. En effet, la présence de la ou des deuxièmes ouvertures ne se traduit alors pas par une sortie des rayons lumineux par ces ouvertures ménagées dans le boîtier. Ainsi, il n'est pas nécessaire d'adjoindre au module 10 d'équipement externe spécifique visant à l'obtention d'un rendu optique équivalent à ceux des dispositifs actuels.On the other hand, the use of the masking elements is particularly advantageous in the configurations in which the flow of fluid flows in the region of the highly heated housing by the mirrors which reflect the light away from the optical setting. form. Indeed, the presence of the second or openings then does not result in an output of light rays through these openings in the housing. Thus, it is not necessary to add to the module 10 specific external equipment to obtain an optical rendering equivalent to those of current devices.

Ainsi, le module d'émission lumineuse selon l'invention contribue à fortement atténuer la chaleur sollicitant les différents éléments du dispositif d'émission lumineuse tout en ne dégradant pas le rendu lumineux obtenu.Thus, the light emitting module according to the invention contributes to greatly attenuate the heat requiring the various elements of the light emitting device while not degrading the light rendering obtained.

Dans la description ci-dessus, la source, le module à miroir et l'optique de mise en forme ont été décrits comme reçus dans un orifice d'une paroi du boîtier. Selon une variante de l'invention, la source d'émission lumineuse 14, l'optique 18 et/ou le module à miroirs 16 sont en regard de l'orifice mais ne sont pas agencés directement dans l'orifice.In the above description, the source, the mirror module and the shaping optics have been described as received in a port of a wall of the housing. According to a variant of the invention, the light emitting source 14, the optics 18 and / or the mirror module 16 are opposite the orifice but are not arranged directly in the orifice.

On remarque que l'invention concerne en outre un module d'émission lumineuse, notamment pour véhicule automobile, comportant :

  • un boîtier délimitant un volume intérieur,
  • une optique de mise en forme adaptée pour mettre en forme des rayons lumineux pour former un faisceau de sortie du module d'émission lumineuse,
  • une source d'émission lumineuse adaptée pour émettre des rayons lumineux dans le volume intérieur,
  • un dissipateur thermique agencé pour dissiper au moins une partie de la chaleur générée par l'émission par la source d'émission lumineuse de rayons lumineux,
  • un module à miroirs agencé pour recevoir au moins une partie des rayons lumineux émis par la source d'émission lumineuse, le module à miroirs comprenant une pluralité de miroirs chacun déplaçable entre une première position dans laquelle le miroir correspondant est agencé pour réfléchir des rayons lumineux lui parvenant de la source d'émission lumineuse en direction de l'optique de mise en forme, et une deuxième position dans laquelle le miroir correspondant est agencé pour réfléchir les rayons lumineux lui parvenant de la source d'émission lumineuse à l'écart de l'optique de mise en forme,
le module d'émission lumineuse comprenant en outre un module de refroidissement configuré pour générer un flux de fluide circulant au contact du dissipateur thermique de la source d'émission lumineuse pour refroidir le module d'émission lumineuse.It should be noted that the invention furthermore relates to a light emission module, in particular for a motor vehicle, comprising:
  • a housing delimiting an interior volume,
  • a shaping optics adapted to shape light rays to form an output beam of the light emitting module,
  • a light emission source adapted to emit light rays in the interior volume,
  • a heat sink arranged to dissipate at least a portion of the heat generated by the emission by the light emission source of light rays,
  • a mirror module arranged to receive at least a portion of the light rays emitted by the light emission source, the mirror module comprising a plurality of mirrors each movable between a first position in which the corresponding mirror is arranged to reflect light rays from the light emission source towards the shaping optics, and a second position in which the corresponding mirror is arranged to reflect the light rays coming from the source of light emission away from the optics of formatting,
the light emission module further comprising a cooling module configured to generate a flow of fluid flowing in contact with the heat sink of the light emission source for cooling the light emission module.

Claims (17)

  1. Light-emitting module (10), in particular for motor vehicles, comprising:
    - a housing (12) delimiting an inner volume and comprising at least a first opening (01) and a second opening (02),
    - a shaping optics (18) adapted to shape light rays to form an output beam from the light emitting module (10),
    - a light emission source (14) adapted to emit light rays into the interior volume,
    - a mirror module (16) arranged to receive at least some of the light rays emitted by the light emitting source (14), the mirror module (16) comprising a plurality of mirrors (32) each movable between a first position in which the corresponding mirror is arranged to reflect light rays coming from the light emitting source (14) to it towards the shaping optics (18), and a second position in which the corresponding mirror is arranged to reflect the light rays coming from the light emitting source (14) away from the shaping optics (18),
    the light emitting module (10) further comprising a cooling module (20) configured to generate a flow of fluid flowing within the interior volume between the first and second openings (01,02) to cool the light emitting module (10),
    the module being characterized in that at least a part of the mirrors are, in the second position, arranged to reflect the light rays coming from the light emission source (14) towards at least one wall of the housing (12), the second opening (02) being formed in said wall.
  2. A light emitting module (10) according to claim 1, wherein the light emitting module (10) comprises at least one masking element (22) arranged on an optical path between the mirror module (16) and the second opening (02), the masking element (22) being configured to prevent light rays from the mirrors from leaving the housing (12) via the second opening and following said optical path.
  3. A light emitting module (10) according to claim 2, wherein the masking element (22) extends from said wall.
  4. The light emitting module according to claim 2 or 3, in which the fluid flow flows in contact with the masking element (22).
  5. A light emitting module (10) according to any one of claims 2 to 4, wherein the light emitting module (10) comprises at least two masking elements extending from said wall, the two masking elements delimiting between them a fluid flow channel leading to the outside of the housing (12) via the second opening (02).
  6. The light emitting module (10) according to claim 1, wherein the second opening (02) forms an outlet opening of the fluid flow from the housing (12).
  7. A light emitting module (10) according to any of the preceding claims, wherein the housing (12) comprises a plurality of second openings, the cooling module (20) being configured to generate a plurality of fluid flows each flowing between the first opening (01) and one of the second openings (02).
  8. A light emitting module (10) according to any of the preceding claims, wherein the light emitting source (14) comprises a heat sink (28) arranged through the housing (12) or arranged outside the housing, the cooling module (20) being further configured to generate a second flow of fluid flowing in contact with said heat sink.
  9. A light emitting module (10) according to any of the preceding claims, wherein the cooling module (20) includes a fan (40).
  10. A light emitting module according to claims 9 and 10, wherein the fan (40) is configured to simultaneously generate the flow of fluid flowing in the interior volume of the housing (12) and the second flow of fluid flowing in contact with the heat sink (28).
  11. A light emitting module (10) according to claim 9 or 10, wherein a fluid outlet of the fan (40) is arranged opposite the first opening (01).
  12. A light emitting module (10) according to claim 11, wherein the cooling module (20) comprises a circulation path fluidly connecting a fluid outlet of the fan (40) to the first opening (01).
  13. A light emitting module (10) according to any of claims 9 to 12, wherein the fan (40) is an axial fan.
  14. A light emitting module (10) according to any of claims 9 to 12, wherein the fan (40) is a centrifugal fan.
  15. Light emitting device (2), in particular for motor vehicles, characterized in that it comprises a light emitting module (10) according to any of the preceding claims.
  16. Light emitting device (2) according to the previous claim, characterized in that it is a lighting and/or signalling device for a motor vehicle.
  17. A light emitting device (2) according to claim 15 or 16, wherein the light emitting device (2) is configured to perform one or more photometric functions, in particular regulated functions.
EP17207835.4A 2017-01-04 2017-12-15 Improved light emission module for a motor vehicle Active EP3346184B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1750061A FR3061541B1 (en) 2017-01-04 2017-01-04 IMPROVED LIGHT EMISSION MODULE FOR MOTOR VEHICLES

Publications (2)

Publication Number Publication Date
EP3346184A1 EP3346184A1 (en) 2018-07-11
EP3346184B1 true EP3346184B1 (en) 2019-09-04

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US (1) US10677414B2 (en)
EP (1) EP3346184B1 (en)
CN (1) CN108302486B (en)
FR (1) FR3061541B1 (en)

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JP7469861B2 (en) * 2019-09-02 2024-04-17 株式会社小糸製作所 Lighting unit
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Also Published As

Publication number Publication date
CN108302486B (en) 2021-12-07
FR3061541A1 (en) 2018-07-06
US10677414B2 (en) 2020-06-09
CN108302486A (en) 2018-07-20
EP3346184A1 (en) 2018-07-11
FR3061541B1 (en) 2020-11-13
US20180187859A1 (en) 2018-07-05

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