JP2018188139A - Lamp module for motor vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a single module which is constituted so as to project two types of beams without casing the existence of dark line streams in the beams at a "high-beam" mode by the instantaneous control of two constituent members of a lamp module.SOLUTION: A lamp module 1 for a motor vehicle comprises: at least two light sources 2, 4; devices 6, 8 for optically deflecting light beams discharged from the light sources 2, 4; a forming optical component 10 for forming the deflected light beams; and a shield body 12 which is arranged between the optical deflection devices 6, 8 and the forming optical component 10, and takes at least two different positions. The light sources 2, 4 are controlled as functions of the positions of the shield body 12.SELECTED DRAWING: Figure 1

Description

  The invention relates to the field of lighting and / or cues, in particular for motor vehicles.

  Motor vehicles are equipped with headlights intended to illuminate the road ahead of the vehicle at night or in limited light. These headlights can generally be used in two illumination modes: a first “high beam” mode and a second “low beam” mode. The “high beam” mode is a beam concentrated around the optical axis of these headlights, and makes it possible to strongly illuminate a distant road ahead of the vehicle. “Low beam” mode gives shorter road lighting, but nevertheless is a good beam without dazzling other road users with a beam that extends to both sides of the optical axis and below the horizon. Provides visibility. These two lighting modes are used alternately depending on the driving conditions encountered by the vehicle, and are sequentially implemented using a manual command of the vehicle or rather automatically using an appropriate command device.

  Two separate modules are integrated into the same headlight and are known for the beams associated with the “high beam” and “low beam” modes to be produced by these modules.

  Furthermore, there is known a lighting module provided with two light sources or a set of light sources so that both a low beam function and a high beam function can be produced by a single module. It makes it possible to limit the number of modules for creating this plurality of functions and thus the overall light beam requirement. When low beam emission is intended, the first light source is turned on and the shield blocks some of the emitted light. This is to follow the shape of the first beam of the cut-off beam type (that is, the partial beam that illuminates the road site closest to the vehicle) without emitting light beyond the horizon. When high beam emission is intended, simultaneous lighting of the two light sources is commanded. This is to form the first beam as described above by the first light source and the additional beam by the second light source.

  The disadvantage of such a solution is the presence of dark stripes between the first beam forming the “low beam” and the additional beam forming the “high beam”. The dark stripe corresponds to the free edge of the shield. The overall beam formed by the superposition of the two half beams is not continuous, which can interfere with the driver.

  For example, the part of the beam that forms the low beam (its light intensity is defined by the characteristics of the first light source) and the part of the beam that forms the high beam (its light intensity is defined by the characteristics of the second light source) Other problems such as the contrast of light between and the like also occur.

  The second light source must be designed to emit high intensity light. In particular, in the case of the second light source formed by a plurality of light emitting diodes, the high beam function is worthy of many of these diodes, but this function is implemented only when there are fewer than the low beam functions.

  The present invention aims to propose a lighting module that provides a solution to these various drawbacks.

  For this purpose, the invention relates to at least two light sources, a device for deflecting the light emitted by the light source, an optical component for shaping the deflected light, an optical deflection device and a shaping optical component. And a lighting module for a motor vehicle with a shield that can take at least two distinct positions. According to the invention, the light source is controlled as a function of the position of the shield. In particular, provisions are made to ensure that each light source is turned on or off depending on the position of the shield, or rather, that the light flux of these light sources is emitted as a function of this position of the shield. obtain. Thus, through simultaneous control of these two components of the light module, a single beam configured to project two types of beams in “high beam” mode without the presence of dark streaks in the beam. It is possible to propose a module.

According to various features of the present invention employed separately or in combination, the following provisions can be made.
The light sources are controlled independently of each other as a function of the position of the shield,
-The lighting module comprises a module for controlling the lighting of the light source, configured to receive information arising from the command module of the shield;
The shield command module is configured to instruct a mechanism for driving the shield to place the shield in the first partially blocked position or the second gap position; In one partially blocked position, a portion of the light emitted by the light source is blocked by the shield and in that second gap position, the light emitted by the light source is not blocked at all by the shield, , At least a smaller amount is blocked compared to the portion of the light beam blocked by the shield in the first position (the term less or smaller than the first portion is the shield in the second gap position) Is understood to mean that at most 10% of the amount of light corresponding to the first part is blocked)
The deflecting device comprises a plurality of reflectors each associated with one of the light sources; the deflecting device comprises two reflectors arranged sequentially along the optical axis;
The deflection device comprises at least two reflectors arranged laterally adjacent to the optical axis (the lateral axis is understood to be the axis perpendicular to the optical axis in the support surface of each light source) Want)
The at least two reflectors are configured to have different focal lengths;
The first of the two reflectors has a focal length shorter than the focal length of the second of the two reflectors, and the second of the two reflectors Between the first reflector of the two reflectors and the shield,
The lighting module comprises three reflectors, the first of the three reflectors having a focal length longer than the focal length of the other two reflectors, of which one of the three reflectors The second reflector is placed between the other two reflectors,
The at least one light source comprises one or more light-emitting means capable of changing the light emission intensity, the light source being controlled as a function of the position of the shield by changing the light emission intensity of the light emitted by the light source; And
The at least one light source comprises a plurality of selectively addressable light emitting elements, the light source being controlled as a function of the position of the shield by turning on and / or turning off the light emitting elements;
Each of the light sources is controlled to change the light intensity emitted by the light source as a function of the position of the shield, the change being made when the shield transitions from one position to another Two light sources are controlled in opposite directions when the shield transitions from one given position to another, in the direction of decreasing intensity or increasing intensity,
-The shield is movable in the direction of rotation about the transverse axis (the transverse axis is understood to be the axis perpendicular to the optical axis in the plane of the support of each light source as before; ),
The shield comprises two walls that are offset relative to each other along the optical axis when the shield is in a first position for partially blocking the light beam; (In this first blocking position, the free edge of one wall is placed in the vicinity of the red focal plane of the lens and the free edge of the other wall is Near the blue focal plane)
The lighting module comprises a cooling component, each light source and optical deflection device being fixed directly or indirectly on the cooling component, the cooling component being a deflection device with respect to the light source; (The particular configuration of the module in which the components are arranged vertically with the cooling components underneath may be preferred)

  The invention further relates to a headlight for a motor vehicle equipped with a lighting module as described above.

  The present invention further provides an illumination direction for a motor vehicle, wherein a first anti-glare illumination function is created by projecting a cut-off beam and a second unobstructed beam is projected. Two long-distance illumination functions are created, and the transition from the cut-off beam to the unobstructed beam is carried out by tilting the shield, in particular through the light emitted by the light source, during which the at least one When the light intensity emitted by the first light source and one second light source is controlled as a function of the beam intended to be projected and is intended to produce an unobstructed beam, the first light source is the second light source. The first light source is more powerful than the second light source when it is intended to produce a cut-off beam, while it is controlled to emit at a higher intensity. It is controlled to emit light at a low intensity, to a lighting method.

  The first light source is configured to emit light that extends across the width of the beam emitted by the module, and the second light source emits light that is concentrated in the center of the beam emitted by the module. In this case, the illumination method can control the first light source by lowering the light intensity while the emission intensity of the second light source is increased and the cut-off beam. At the same time as the tilting of the shield to a position to partially block the light beam to produce

  As a variant, the control of the first light source by increasing the light intensity allows all light rays to pass through simultaneously with a decrease in the light intensity of the second light source and to create an unobstructed beam. This can be done simultaneously with the tilting of the shield to the gap position.

  Further features, details, and advantages of the present invention will become more apparent upon reading the detailed description (provided by way of example) with reference to various embodiments of the invention shown in the following drawings: Will.

FIG. 2 is a schematic diagram of a lighting module according to a first embodiment of the present invention, showing a partial path of rays emitted by each light source to represent a first mode of operation for emitting a “low beam” type beam; Figure. FIG. 2 is a schematic diagram of the lighting module of FIG. 1, showing a path of a portion of the light emitted by each light source to represent a second mode of operation for emitting a “high beam” type beam. FIG. 5 is a schematic diagram of a lighting module according to a second embodiment of the present invention, and more specifically shows the effect of a double-walled shield disposed on one focal point in one reflector associated with one light source. . A perspective view of an embodiment of such a double-walled shield. FIG. 3 is a schematic plan view of a lighting module according to the first embodiment of the present invention, and shows a path of a part of a light beam emitted by each light source to represent a first operation mode for emitting a “high beam” type beam; FIG. The figure of the typical expression which shows the control of each light source corresponding to discharge | emission of the light beam which shows the beam of a "high beam" type when it can project on the wall surface spaced apart from the lighting module, and forms a different beam. The figure of the typical expression which shows the control of each light source corresponding to discharge | emission of the light beam which shows the beam of a "low beam" type when it can project on the wall surface spaced apart from the lighting module, and forms a different beam.

  The lighting module 1 according to the invention is intended to be installed in a headlight of a motor vehicle. This module comprises at least two light sources 2, 4 in addition to the light sources 2, 4 associated with the devices 6, 8 for optically deflecting the light rays that they would emit, respectively. An optical component 10 is also provided for shaping the emitted light. The molding optical component is common to each of the optical deflection devices 6 and 8. It should be understood that the emitted light thus exits the light module 1 and is deflected to participate in the formation of illumination and / or cue beams. According to the invention, the lighting module is configured to emit at least two types of light beams, in particular as a function of the control of each light source. Among these light beams, there are “low beam” type beams and “high beam” type beams, which have a shape point with or without a cut-off on the horizontal line and the light intensity of each. Are different from each other. That is, each of the light intensities is uniform across the entire beam, or, for a “low beam” beam, the intensity can be relatively reduced between the center of the beam and the edge of the beam. It is a strong strength, or rather, a strength that is maximum in the central portion and more diffused laterally. Furthermore, the maximum intensity of the “high beam” type beam is higher than that of the “low beam” type beam, in particular about twice as high.

  In the illustrated example, the molding optical component 10 has a shape of a focusing lens that defines an optical axis 11, and the light sources 2 and 4 are disposed on the optical axis 11. The position of each light source can vary slightly without departing from the scope of the present invention, and these light sources can be placed slightly below or slightly above the optical axis.

  The lamp module further comprises a shield 12 disposed between the optical deflectors 6 and 8 and the molding optical component 10. The shield 12 includes at least two distinct positions, in particular two terminal positions (a first position for partially blocking the light beam shown in FIGS. 1 and 3 and a second gap position shown in FIG. 2). ) Is movable.

  The lighting module 1 further includes one or more command or control modules 14 and 16. Each of the modules 14 and 16 is configured to control the operation of the light sources 2 and 4 and / or the light flux emitted by these light sources and / or the position of the shield 12.

  According to the present invention, each light source 2, 4 is controlled in terms of both lighting and intensity or emitted light flux as a function of the position of the shield 12. The lighting module 1 includes a module 14 for controlling the operation of each light source. The module 14 is configured to receive information originating from a separate command module 16 dedicated to directing the position of the shield. The two command and control modules 14, 16 comprise communication means arranged to allow information to be exchanged (at least in the direction from the command module 16 to the control module 14). 1 and 2 show a wired connection between two modules. However, it should be understood that the communication means can comprise wireless communication means.

  Hereinafter, with particular reference to FIGS. 6 and 7, an explanation will be given of how each light source is controlled as a function of the position of the shield. In particular, at least one light source includes one or more light emitting means (which can change the light emission intensity), and the light source is changed by changing the light emission intensity of the light emitted by the light source. Provisions can be made for being controlled as a function of the position of the shield.

  In this way, each light source can be controlled to change the luminous flux emitted by this light source as a function of the position of the shield. The light beam is changed in a direction to decrease the light beam or to increase the light beam when the shield changes from one given position to another position. It should be understood that by reading the following, the two light sources can be controlled in particularly opposite directions when the shield is transitioned from one given position to another. Furthermore, according to the present invention, each light source is controlled by increasing / decreasing the light flux every time the position of the shield changes, and one light source emits more light flux than the light emitted by other light sources in all cases. It is possible to keep doing.

  Each optical deflector 6, 8 comprises a reflector 7, 9 according to the invention, which reflector 7, 9 is associated with one of the light sources 2, 4, respectively. Each light source and the optical deflection device are fixedly connected to the support 18, and a heat exchange device 20 is also installed on the support 18.

  Each light source is arranged in particular on the first surface 21 of the support 18, in particular on the upper surface facing the substantially elliptical reflector. The heat exchanging device 20 can be fixed to the support on the surface opposite to the first surface 21, or can even be manufactured to be integral with the support. In the illustrated example, the light sources 2, 4 and the reflectors 7, 9 are arranged on the upper surface of the support 18, and the components are arranged in the vertical direction so that the heat exchange device 20 is arranged under each light source. Are lined up.

  In the embodiment shown in FIGS. 1-4, two light sources and two reflectors are provided, each reflector being relative to the support 18 in order to be in a defined position with respect to the corresponding light source. Are linked to each other.

  In particular, each reflector is in the form of a shell with an elliptical or substantially elliptical inner reflective surface 22. As a result, each reflector has two focal points and a corresponding light source is placed at the first focal point. The light source emits most of its light energy towards the inner reflective surface, but because the light source is located near the first focal point of the reflector, the emitted light is directed to the second focal point of the reflector. Be deflected towards. Due to the elliptical or substantially elliptical nature of the area of the inner reflective surface 22 where the light emitted by the light source strikes, the light will be transferred to the second focus accurately or relatively around the second focus. It is deflected to transfer at large extended distances and thus form a spot that would form a suitable beam after being projected by the molding optics.

  The reflectors are shaped and positioned relative to each other such that the second focal points are arranged in the vicinity of each other and advantageously coincide.

  For each assembly formed by the light source and the reflector, in the vertical section including the optical axis, the light sources 2, 4 are on the one hand substantially defined by the molding optics (in this case a lens). Arranged on the optical axis 11 and on the other hand on the first focal points f17, f19 of the corresponding reflectors 7, 9, are directed towards the reflectors 7,9. Furthermore, the second focal point f2 of the reflector is substantially coincident with the object focal point of the lens. That is, light rays emitted from the first focal points f17 and f19 and deflected to pass through the second focal point can exit from the lens toward the outside of the apparatus in parallel with the optical axis.

  The two reflectors 7 and 9 are arranged side by side along the optical axis 11.

  The first reflector 7 forms a first optical deflection device 6 associated with the first light source 2 and arranged on the optical axis 11. The second reflector 9 shapes the second optical deflection device 8 associated with the second light source 4, and the deflection device 8 also includes the first light source and the lens forming the molding optical component 10. It arrange | positions on this optical axis so that it may be set | placed on the optical axis 11 between.

  The second reflector 9 is open at a rear portion thereof, that is, a portion facing the molding optical component so as to make a continuation with the first reflector. As a result, the light beam deflected toward the molding optical component by the reflecting surface of the first reflector is not affected by the presence of the second reflector.

  According to the invention, the two reflectors 7, 9 are configured to have different focal lengths. In each figure, the first reflector has a focal length F1 that is shorter than the focal length F2 of the second reflector. Of the two reflectors, the second reflector is disposed between the first reflector and the shield as specified above.

  The short focal length of the first reflector 7 makes it possible to project a wide light beam. This is suitable for producing a beam that spreads across the road scene, which is desirable for a “low beam” type beam. Further, as can be seen in FIG. 4, the shape of the inner reflective surface of the first reflector 7 is such that the light beam deflected to both sides of the second focal point spans a first extended distance d1 (shown in FIG. 5). Calculated to widen.

  For this purpose, the reflective surface can in particular be defined by an elliptical shape of the strip defined around the optical axis and a generally elliptical shape on the edge of this surface.

  On the contrary, the long focal length of the second reflector 9 allows a beam concentrated around the optical axis to be projected. It would then be possible to form much more concentrated spots in the beam, which is desirable for “high beam” type beams. Furthermore, as can be seen in FIG. 4, the shape of the inner reflecting surface of the second reflector 9 has been calculated for a minimal expansion of the deflected beam. Thereby, the expansion of these rays on both sides of the second focal point occurs over a second extension distance that is shorter (in this case minimal) than the first extension distance d1. As a result, it coincides with the second focal point, and all rays reflected by the second reflector (indicated by double arrows in FIG. 5) exit the molding optical component 10 parallel to the optical axis. This results in an image at infinity and concentrated around the optical axis, which results in the spot of the beam, ie the point of maximum luminous flux centered on the road scene to be illuminated.

  On the contrary, because of the extended distance d1, a part of the light beam deflected by the first reflector (indicated by a single arrow in FIG. 5) emerges from the shaping optical component 10 by diverging with respect to the optical axis. go. This results in an extended beam at infinity.

  Thus, it should be understood that FIG. 5 shows the following in plan view: That is, how the arrangement of the reflectors at different focal lengths shifted from each other makes the assembly formed by the first light source and the first reflector dedicated to creating the beam width. While the assembly formed by the second light source and the second reflector provides a spot of the beam.

  As can be seen in FIGS. 1 to 4, the shield 12 is arranged in the lighting module 1 such that the free edge of this shield is located near the second focal point of both reflectors.

  In the first embodiment shown in FIGS. 1 and 2, the shield 12 is movable in the rotational direction around a horizontal axis (that is, an axis perpendicular to the optical axis of the lighting module). The shield 12 is made of a plate, and its end edge 24 is configured to be near the second focal point of the optical deflector. By directing the position of the shield 12, the light is passed through the shield (as described above) through instructions from the associated command module 16 to the drive mechanism (in this case, an actuator not shown associated with the shield). It is possible to transfer from the first position for partially blocking to the second gap position. In that first position, the first part of the light emitted by the light source is blocked by the shield (FIG. 1), and in the second position, the light emitted by the light source is not blocked at all by the shield. Alternatively, at most, a small amount of the light beam directed toward the first portion blocked by the shield in the first position is blocked by the shield (FIG. 2).

  The shield 12 may comprise a profile free end edge 24 having an inclined portion forming a step in the approximate center. The risk of dazzling vehicles arriving on the other side of the road scene, as can be seen in FIG. 7 which shows the cut-off beam projected when the shield 12 is in a position to partially block the light beam It seems that the beam has such a step on top of itself, which allows for further illumination of the road scene without the.

  The principle of the shield should be understood as follows. That is, the light ray R1 emitted to the first focal points f17 and f19 inaccurately, or, rather, the light rays expanded on both sides of the second focal point f2 due to the shape of the inner reflecting surface which is not completely elliptical, Although these rays are blocked when crossing the optical axis on the upstream side of the second focal point f2, if these rays are not blocked, they cross the optical axis upstream of the object focal point of the lens. It should be understood that on going out it will be directed upwards.

  Projecting a first anti-glare illumination function by projecting a cut-off beam and a second unobstructed beam in the same lighting module by using a shield and being tiltable It is possible to create both of the second long-distance illumination function.

  Here, the operation of the lighting module and in particular the control of each light source as a function of the position of the shield will be described.

  As is most often the case when practicing the present invention, when the goal is to create a cut-off beam for the first anti-glare lighting function, the control module 14 is the first short focus. An instruction regarding the high load operation of the first light source 2 associated with the distance reflector 7 and an instruction regarding the low load operation of the second light source 4 associated with the second long focal length reflector 9 are transmitted. For ease of reading, FIG. 1 depicting an embodiment of a first anti-glare lighting function schematically shows a first light source that emits a certain number (three in this case) of light at maximum load. However, the number of light rays is larger than the number of light rays emitted by the second light source at low load (in this case, one).

  According to the present invention, it is advantageous that various light sources are provided with a plurality of light emitting elements configured to emit light with different outputs. Thus, the first light source comprises a light emitting element suitable for emitting light at maximum load that would form a light beam at a maximum intensity of 50 lux, and the second light source has an intensity between 50 lux and 100 lux. A light emitting device suitable for emitting a light beam at a maximum load that will form a light beam is provided.

  In the case of the first anti-glare lighting function, the aim is to illuminate the road scene with a maximum intensity of about 50 lux, for example by having a uniformly expanded beam. Therefore, the luminous flux emitted by the second light source is reduced to take a value close to the value of the luminous flux emitted by the first light source.

  It is noteworthy that the “lux” intensity value is obtained by measurements performed on this plane for beam projection over a plane perpendicular to the optical axis located at 25 m. Furthermore, the above-mentioned values of 50 lux and 100 lux relate to the light emission value of the headlight, and there is a deviation of 15% between the light emission value of the headlight and the light emission value of the lighting module housed in the headlight. It should be understood that can be recorded.

  As shown in FIG. 1, for the purpose of obtaining the first anti-glare illumination function, the shield 12 is controlled so as to be partially shielded from the light beam. It seems to block rays that would be projected beyond the horizon, thus dazzling other users. As can be seen in FIG. 7, a beam referred to as a low beam 30 is created with a cut-off edge 32 of contour equivalent to the edge 24 of the shield 12. The beam 30 includes a first wide area 34 formed by shaping light rays emitted by the first light source and deflected by the first short focal length reflector, and within the first wide area. A second zone 35 having a slightly higher luminous flux than the luminous flux (due to the superposition of the light rays emitted by the respective light sources).

  When the user sends a command to transition from the first anti-glare lighting function to the second lighting function, or, rather, various conditions that are preferable to transition to the second lighting function are installed in the vehicle. When the element is detected, i.e. when the need for high light intensity is detected without necessarily risking dazzling another road user, by moving the shield from the partially blocked position to the gap position A transition from a cut-off beam to an unobstructed beam is performed. In the illustrated case, the shield is rotated through an instruction from the command module 16 so that it can no longer be in the light emitted by each light source, as can be seen in FIG. Is not placed.

  In accordance with the present invention, information regarding the transfer of the shield is taken into account so as to continue to trigger the control module 14 to activate one or more light sources. In particular, provision can be made for the command module 16 to be configured to communicate information regarding the transfer of the shield directly to the command module.

  At the same time, following the transfer of the shield, the command module 14 generates and emits at least one instruction to activate each of the two light sources. The operation instruction can include an on / off instruction and an instruction related to the operation intensity.

  In certain embodiments of the invention, the two light sources are permanently turned on, whether intended to perform the first or second illumination function, and the light intensity emitted by each light source is projected. Controlled as a function of the beam desired to be done.

  In particular, the control module 14 transmits an instruction regarding the low load operation of the first light source 2 and an instruction regarding the full load operation of the second light source.

  It will be understood that in certain embodiments of the invention, controlling the reduction of the luminous flux of one light source and the increase of the luminous flux of the other light source is performed simultaneously with a change in the position of the shield. I want.

  Thus, in the first case, controlling the first light source to increase its luminous flux simultaneously reduces the luminous flux of the second light source and also partially blocks the light beam to create a cutoff beam. Can be generated simultaneously with tilting the shield to the position for.

  Further, in the second case, controlling the first light source to reduce its luminous flux allows all light to pass simultaneously to increase the luminous flux of the second light source and create an unobstructed beam. This can be caused simultaneously with the tilting of the shield to the position of the air gap that allows this.

  When transitioning from a “low beam” type first anti-glare illumination function to a “high beam” type second illumination function, the activation instruction includes a request to reduce the luminous flux resulting from the emission of light by the first light source; This corresponds to the demand to increase the luminous flux derived from the emission of light from the second light source.

  As can be seen in FIG. 6, this results in an unobstructed beam 38 called the high beam. The beam 38 includes a first wide area 40 formed by shaping light rays emitted by the first light source and deflected by the first short focal length reflector, and a second at the center of the beam. The second area 42 is an area where the luminous flux is larger than that in the first wide area 40.

  Thereafter, when a situation requiring switching to the low beam type illumination mode is identified, that is, when a transition is made from the “high beam” type second illumination function to the “low beam” type first anti-glare illumination function. The operation instruction corresponds to a request to increase the luminous flux derived from the emission of the light beam from the first light source and a request to decrease the luminous flux derived from the emission of the light beam from the second light source.

  According to the present invention, the instruction for operating each light source so as to manage the increase and decrease of the luminous flux can be defined as follows. That is, depending on whether the first wide area 40 of the high beam 38, the first wide area 34 of the low beam 30, the second central area 36 of the low beam 30, and the second central area 42 of the high beam 38 are important. It seems that the light flux in each of these areas increases. Corresponding areas are shown in FIGS. 6 and 7 and illustrate this development, which determines the magnitude of operation of each light source according to the projected beam. These areas have lines written more densely in each area as the luminous flux increases.

  The shape and arrangement of each reflector forming the optical deflectors 6 and 8 can be varied, in particular including at least two reflectors arranged close to each other transverse to the optical axis. it can. For example, the optical deflection assembly can be provided with three reflectors. In that case, the first reflector of the three reflectors has a longer focal length than the focal lengths of the other two reflectors, and of the three reflectors, this first reflector is the other Arranged between two reflectors.

  A second embodiment of the present invention will now be described with particular reference to the illustration of FIG. 3, which differs from the first embodiment in that the shield 112 comprises two walls. .

  Such a double-walled shield is used to address the chromatic aberration problem on the cut-off, particularly when forming a “low beam” type beam. Indeed, the reflector consists of an achromatic (chromatic aberration correction) system where each ray has the same path regardless of their wavelength. However, the molding optical component formed by a thick convex flat lens as shown in the figure has a large chromatic aberration, that is, the path of each light beam depends on the wavelength. The position of the object focus of the lens along the optical axis 11 common to each reflector and lens is determined by the wavelength to be emphasized. In particular, for the purpose of simplification, the blue and red wavelengths of the visible light can be emphasized, and thus the blue focus Fb and the red focus Fr can be defined for the lens.

  When equipped with the system, the back focus adjustment allows the lens to be placed so that its blue focus Fb or red focus Fr coincides with the second focus of each reflector. At infinity, or at a distance significantly away from the dimensions of the headlight, the image of the physical limits of a single shield as shown in FIGS. 1 and 2 will change color depending on the back focus adjustment of the lens, especially It can be red, or conversely blue (if accompanied by a red focal point Fr, or conversely a blue focal point Fb that coincides with the second focal point of each reflector).

  In this case, the chromatic aberration sensitivity is reduced by using the double-walled shield 112 configured such that the walls 44 and 46 are displaced along the optical axis. In the first shape configuration position, the edge 124 of each wall of the shield is placed near the optical axis. In that state, the edge of the first wall 44 is located in the plane near the red focal plane Fr of the lens, and the edge of the second wall 46 is located in the plane near the blue focal plane Fb of the lens. Yes. It should be understood that this arrangement can be equally created by implementing two independently connected shields.

  In this case, the two wall bodies are formed from a single cut-out metal part that is punched and bent into a substantially V-shape or U-shape (with the concave side facing upward). As a result, the shield comprises a base 48 on which the axis of rotation is formed. As shown in FIG. 3, each wall body is configured to take a position that is shifted relative to each other along the optical axis when the shield body is in the first position for blocking the light beam.

  The second wall 46 preferably comprises an opaque lateral strip 50 defining an upper edge 124 and areas 52 that are transparent to the light and extend on both sides of the optical axis under the strip.

  The cutouts of the edge portions of the wall bodies 44 and 46 of the shield 112 are substantially the same as shown in FIG. The horizontal upper part and the horizontal lower part of the upper edge are connected to each other by an inclined edge. Then, it is possible to prepare for aligning the intersection of the horizontal upper part and the inclined edge of the wall 46 associated with the blue focal plane Fb on the optical axis.

  The cutouts at each edge result in a superposition of the images that makes it possible to obtain a natural light beam cutoff with no color change.

  For the second wall, only the top corresponding to the cut-off, i.e. the lateral strip 50, helps to eliminate the risk of beam color change, so that the presence of transparent areas 52 is the color of the assembly. It should be understood that it does not change erasability. However, this transparent area 52 allows the light beam to help form a beam. The result is a substantial improvement in the photometric performance of the headlight and the achievement of a more concentrated spot near the cutoff.

  The above description illustrates how the present invention can fulfill its stated purpose, in particular, a lighting module that allows two separate lighting functions to be created with the following: It clearly explains what to propose. In particular, uniformity in the quality of the "low beam" beam, optimization of the use of each light emitting element forming each of the light sources associated with the generation of one or the other of the beam, and (if appropriate) cut without color change Achievement of off-beam.

  Of course, various modifications may be made by those skilled in the art to a light module for a motor vehicle that has just been described as a non-limiting example, when it is intended to obtain an anti-glare beam. As long as the light emission operating characteristics of the light source are determined as a function of the position of the shield, which is also used to cut part of the light. For example, instead of controlling each light emitting element forming one or more light sources, the arrangement of one or more additional filters (their) shields the light flux emitted by each light source. Provisions can be made for controlling the luminous flux by controlling (which helps increase or decrease as a function of body position).

  In any case, the present invention is in no way limited to the embodiments specifically described in this document, and in particular any equivalent means or any technical combination using these means. It extends.

Claims (18)

  At least two light sources (2, 4), a device (6, 8) for optically deflecting the light emitted by said light sources (2, 4), and an optical component for shaping the deflected light (10) and a shield (12, 112) arranged between the optical deflection device and the molding optical component and capable of taking at least two separate positions. In the lighting module (1), the light source (2, 4) is controlled as a function of the position of the shield (12, 112).   The lighting module according to claim 1, characterized in that the light sources (2, 4) are controlled independently of each other as a function of the position of the shield (12, 112).   A module (14) for controlling the lighting of the light source (2, 4) configured to receive information originating from the command module (16) of the shield (12, 112). The lighting module according to claim 1 or 2.   The command module (16) of the shield (12, 112) is configured to instruct a mechanism for driving the shield to place the shield in the first position or the second position. In the first position, the first part of the light beam emitted by the light source is blocked by the shield, and in the second position, the light beam emitted by the light source is not blocked by the shield at all. The lighting module according to claim 3, wherein a smaller amount than that of the first part is cut off.   5. The optical deflection device according to any one of claims 1 to 4, characterized in that it comprises a reflector (7, 9) each associated with one of the light sources (2, 4). The lighting module according to one item.   6. The lighting module according to claim 5, characterized in that at least two reflectors (7, 9) are arranged sequentially along the optical axis (11) of the molding optical component (10).   7. A lighting module according to claim 5 or 6, characterized in that at least two reflectors (7, 9) are configured to have different focal lengths (F1, F2).   The first (7) of the two reflectors has a focal length (F1) shorter than the focal length (F2) of the second of the two reflectors (9), and two Of the reflectors, the second reflector (9) is arranged between the first reflector (7) of the two reflectors and the shield (12, 112). The lighting module according to claim 6 or 7.   The at least one light source (2, 4) includes one or more light-emitting means capable of changing the light emission intensity, and the light source is changed by changing the light emission intensity of the light emitted by the light source. 9. A lighting module according to any one of claims 1 to 8, characterized in that it is controlled as a function of the position of the shield.   The at least one light source (2, 4) comprises a plurality of selectively addressable light emitting elements, and by turning on and / or turning off these light emitting elements, the light source can be the shield (12, 112). The lighting module according to any one of claims 1 to 9, characterized in that it is controlled as a function of the position).   Each of the light sources (2, 4) is controlled to change the light intensity emitted by the light source as a function of the position of the shield, the change being that the shield (12, 112) is one When transitioning from one position to another, in the direction of decreasing the intensity or increasing the intensity, and when the shield transitions from one given position to another The lighting module according to claim 1, wherein the two light sources are controlled in opposite directions.   12. The lighting module according to any one of claims 1 to 11, characterized in that the shield (12, 112) is movable in the direction of rotation about a transverse axis.   The shield (112) includes two wall bodies (44, 46), and the wall bodies (44, 46) have the optical axis when the shield is in a first position for blocking light. The lighting module according to claim 1, wherein the lighting module is configured to take positions shifted relative to each other.   A cooling component (20), on which the light source (2, 4) and the optical deflection device (6, 8) are fixed directly or indirectly, 14. A lighting module according to any one of claims 1 to 13, characterized in that a cooling component is arranged on the opposite side of the light source from the optical deflection device.   A headlight for a motor vehicle comprising the lighting module (1) according to any one of claims 1 to 14.   A lighting direction for a motor vehicle, where a first anti-glare lighting function is created by projecting a cut-off beam, and a second long-distance lighting function is created by projecting a second unobstructed beam. The transition from the cut-off beam to the unobstructed beam is carried out by inclining the shield, in particular through the light emitted by the light source, during which at least one first light source and one second light source The first light source emits at a higher intensity than the second light source when the light intensity emitted by is controlled as a function of the beam intended to be projected and is intended to produce an unobstructed beam The first light source emits at a lower intensity than the second light source when it is intended to produce a cut-off beam. It is controlled lighting methods as.   The first light source is configured to emit a light beam that extends across the width of the beam emitted by the module, and the second light source emits a light beam concentrated in the center of the beam emitted by the module. The illumination method according to claim 1, wherein the control of the first light source by reducing the light intensity is performed simultaneously with an increase in the light emission intensity of the second light source, and a cutoff beam. The illumination method according to claim 16, wherein the illumination method is performed simultaneously with the tilting of the shield to a position for partially blocking a light beam so as to create a light beam.   The first light source is configured to emit a light beam that extends across the width of the beam emitted by the module, and the second light source emits a light beam concentrated in the center of the beam emitted by the module. The lighting method according to claim 16 or 17, wherein the control of the first light source by increasing the light intensity is interrupted simultaneously with a decrease in the light emission intensity of the second light source. 18. Illumination method according to claim 16 or 17, characterized in that it is performed simultaneously with the tilting of the shield to a gap position that allows all rays to pass so as to produce no beam.