FR3062705A1 - LIGHTING MODULE, IN PARTICULAR OF A MOTOR VEHICLE, FOR THE LIGHTING OF PORTIC POINTS - Google Patents

Abstract

A lighting module comprising a light source (14), t shaping optics (20) adapted to form an output light beam (F) of the lighting module from the received light rays, and an element cutoff circuit (18) adapted to define a cutoff in the output beam. The lighting module further comprising: - a deflection surface (24) adapted to receive light rays from the light source and deflect said rays towards the shaping optics (20) for forming light gantry point lighting beams (F2) within the output beam (F), and - a collection surface (22) adapted to collect a portion of the light rays from the light source and deflect said light rays in directing the deflection surface (24) to form said gantry spot light beams, the deflection surface (24) being common to all gantry spot light beams (F2).

Description

© Publication number: 3,062,705 (only to be used for reproduction orders) (© National registration number: 17 51044 ® FRENCH REPUBLIC

NATIONAL INSTITUTE OF INDUSTRIAL PROPERTY

COURBEVOIE © Int Cl ⁸ : F21 V13 / 04 (2017.01), F21 S 41/60

A1 PATENT APPLICATION

©) Date of filing: 08.02.17. (© Applicant (s): VALEO VISION Joint-stock company (© Priority: simplified - FR. @ Inventor (s): BOURDIN DAVID and AYEN NADINE. ©) Date of public availability of the request: 10.08.18 Bulletin 18/32. ©) List of documents cited in the report preliminary research: Refer to end of present booklet (© References to other national documents (73) Holder (s): VALEO VISION Joint stock company related: folded. ©) Extension request (s): (© Agent (s): VALEO VISION Limited company.

A LIGHTING MODULE, ESPECIALLY A MOTOR VEHICLE, FOR THE LIGHTING OF GANTRY POINTS.

FR 3 062 705 - A1

A lighting module comprising a light source (14), t a shaping optic (20) adapted to form an output light beam (F) of the lighting module from the received light rays, and an element cutoff (18) adapted to define a cutoff in the output beam.

The lighting module further comprising:

- a deflection surface (24) adapted to receive light rays from the light source and deflect said rays towards the shaping optics (20) for the formation of light beams from portal points ( F2) within the output beam (F), and

- a collection surface (22) adapted to collect a part of the light rays coming from the light source and deflect said light rays in the direction of the deflection surface (24) with a view to the formation of said point light beams portal frame, the deflection surface (24) being common to all the portal point lighting beams (F2).

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Lighting module, in particular for a motor vehicle, for lighting portal points

The invention relates to the field of lighting devices, in particular of a motor vehicle.

Certain types of lighting devices for motor vehicles are configured to generate an output beam illuminating in front of the vehicle, and in particular lighting at least the road in front of the vehicle.

Some regulations require these devices to also provide lighting for portal points, which correspond to predetermined regions relative to the vehicle in the field of which certain traffic signs are intended to pass, such as for example regions located above of the vehicle and / or on the side of the road.

Observing these specific regulations results in design constraints which can substantially complicate the manufacture of lighting devices.

In particular, devices are known in which part of the light generated by a light source is collected and sent in the direction of a specific region of a shaping optic configured to form an output beam from it. This region is itself configured, typically by its geometric shape, to deflect the rays which reach it in directions suitable for the lighting of these portal points.

However, such an approach has drawbacks. Indeed, the design of the shaping optics, which typically includes a lens, is then made more complex.

The invention aims to improve the situation.

To this end, the invention relates to a lighting module for a motor vehicle, the lighting module comprising:

- a light source suitable for generating light rays,

a shaping optic adapted to receive at least part of the light rays coming from the light source and to form a light beam leaving the lighting module from the light rays received,

- a cut-off element suitable for defining a cut-off in the output beam, the lighting module further comprising:

a deflection surface suitable for receiving light rays from the light source and deflecting said rays towards the shaping optics for the formation of lighting beams of portal points within the output beam, and

a collecting surface suitable for collecting a part of the light rays coming from the light source and deflecting said light rays in the direction of the deflection surface with a view to the formation of said portal point lighting beams, the surface of deflection being common to all portal point lighting beams.

According to one aspect of the invention, the deflection surface is smooth.

According to one aspect of the invention, the deflection surface is flat.

According to one aspect of the invention, the deflection surface is separated from the cut-off element.

According to one aspect of the invention, the lighting module further comprises a support on which the light source is fixed, the deflection surface being formed on said support.

According to one aspect of the invention, the shaping optic has a focal point, the deflection surface lying vertically above said focal point and under said focal point.

According to one aspect of the invention, the deflection surface is intended to return to the shaping optics only light rays configured to contribute to the lighting beams of portal points.

According to one aspect of the invention, the collection surface is smooth.

According to one aspect of the invention, the lighting module further comprises a reflector arranged to collect part of the light rays emitted by the light source and to deflect said light rays in the direction of the shaping optics for the formation of a main portion of the output beam for lighting a portion of road located in front of the motor vehicle.

According to one aspect of the invention, the main portion of the output beam is delimited above by the cut defined by the cut element.

According to one aspect of the invention, the lighting module is configured for the implementation of a vehicle low beam function.

The invention further relates to a motor vehicle lighting device, characterized in that the lighting device comprises a lighting module as defined above.

According to one aspect of the invention, the lighting device is suitable for implementing a dipped beam function and a portal point lighting function.

According to one aspect of the invention, the lighting device is further configured for the implementation of at least one lighting and / or signaling function other than the low beam function and the lighting function. portal points.

The invention will be better understood on reading the detailed description which follows, given only by way of example, and made with reference to the appended Figures, in which:

Figure 1 is a schematic illustration of a lighting device according to the invention; and Figure 2 is a schematic illustration of a lighting module according to the invention.

Figure 1 illustrates a lighting device 2 according to the invention, hereinafter device 2.

The device 2 is intended to be integrated into a motor vehicle. In other words, it is a motor vehicle device.

In the context of the invention, the device 2 is intended to be arranged at the front of the vehicle to light at least at the front of the vehicle.

Advantageously, it is configured to implement at least one regulatory function of low beam, known as “Low Beam” in English, which can be translated by low beam.

In addition, as described below, it is configured to provide lighting for portal point areas. These areas correspond to areas relating to the vehicle within which roadside and / or above the road signs scroll while the vehicle is moving.

The number and the direction of these portal point areas are for example predetermined by one or more regulations. These regulations can also define the light intensity to be supplied within these zones, and / or other parameters.

Still with reference to FIG. 1, the device 2 comprises a housing 4 and a closing glass 6 cooperating with the housing 4 to internally delimit a cavity 8. The device 2 also comprises a lighting module 10 according to the invention, below module 10, arranged in whole or in part in the cavity 8.

The housing 4 is for example of invoice and known construction. The closing glass 6 is for example also of known construction. It is transparent for at least part of the light generated by the module 10.

The module 10 is configured to generate light. More specifically, it is advantageously configured to implement the dipped beam function and the portal point lighting function. It is in particular suitable for implementing them simultaneously.

To this end, it is configured to generate an output light beam F. This beam comprises a main portion F1 via which the low beam function is adapted to be implemented. This portion F1 is intended to illuminate the road in front of the vehicle. The precise characteristics of this portion F1 are for example predetermined according to regulations. These regulations can for example define the minimum and / or maximum light intensity of the beam F1, possibly as a function of the direction considered within the beam F1, the distance at which the beam is projected, etc. Other considerations can be taken into account, in particular the impact that the glass 6 can have on the light generated by the module 10.

The beam F also comprises a plurality of beams F2 for lighting portal points. Each beam F2 is intended for lighting one of the portal point areas.

The direction and the light intensity of these beams F2 are for example predetermined, for example according to regulations. Other elements can be taken into account, in particular the impact of the closing glass on the light emitted by the module 10.

The details of the formation of the beams F, F1 and F2 are given below.

Referring to Figure 2, the module 10 comprises a support 12, a light source 14 and a reflector 16. It further comprises a folder 18 and a shaping optic 20. Furthermore, it comprises a collection surface 22 and a deflection surface 24.

The support 12 is suitable for maintaining at least part of the elements of the module 10 in a fixed position. For example, these elements are fixed directly to the support 12, or are attached to it by means of one or more fixing parts. For example, the source 14, the reflector 16 and the folder 18 are fixed on the support 12. For example, the deflection surface 24 is itself formed on the support. Note that the shaping optics can be made fixed relative to the support by its relation to the housing 4 or to any other element of the device 2.

The support is fixed relative to the housing 4. For example, it is fixed there directly or is attached to it by any known means.

The support 12 has a general form of plate. For example, it is substantially rectangular.

The support is for example made of a known material, such as aluminum.

The light source 14 is configured to generate light rays.

Advantageously, it comprises a semiconductor photoemissive element adapted to generate photons by electroluminescence when supplied with appropriate electrical energy. For example, this element is a light emitting diode.

The light source 14 is fixed on the support 12, for example on its upper face.

The light source 14 is for example configured to emit white light. Optionally, it is further adapted to emit light of at least one other color.

The reflector 16 is configured to collect at least part of the light rays emitted by the source 14 and to reflect these light rays. More specifically, it is configured to reflect part of the light rays towards the shaping optic 20 and another part towards the folder 18.

The reflector 16 has for example a shape known to the skilled person. For example, it has a domed shape, the concavity of which faces the support 12.

Alternatively, the reflector 16 comprises a plurality of portions in the form of concave shells attached to each other, for example at one of their longitudinal edges. Their concavities are turned towards the support.

The internal face of the reflector 16 is reflective so as to reflect the light rays which reach it. For example, this reflective property is obtained by any known means, such as for example a surface metallization.

The reflector 16 is advantageously positioned above the support. Its exact position and orientation are, for example, predetermined depending on the orientation of the light source and its main direction of emission. For example, for a source 14 emitting in a privileged manner orthogonally to the support, the reflector 16 is positioned directly above the source 14.

The folder 18 is configured to generate a cut within the output beam F. More specifically, the cut is configured to delimit the beam Fl above.

The form of this cut is for example determined by regulations. For example, this cut is substantially horizontal, and has three consecutive straight portions. The two end portions are for example horizontal and vertically offset from one another, and the third portion joins these two portions and is inclined relative to the horizontal.

In practice, the folder 18 forms a reflective cover of chosen shape to give the cut the prescribed shape.

The folder 18 is for example in the general form of a plate, one end 18E of which is turned towards the shaping optic 20.

The end 18E has for example a left edge intended to form the right rectilinear portion of the cut, a right edge offset in height with respect to the left edge and intended to form the left rectilinear portion of the cut, and an intermediate edge inclined intended to form the inclined intermediate portion of the cut.

The edge of the folder located at the end 18E advantageously has a recess for the passage of light rays through the folder, in particular for the light rays passing between the collection surface 22 and the deflection surface 24 or between the deflection surface and the shaping optics. This recess is also advantageously adapted to correct aberrations relating to the shaping optics 20, in particular in order to have a flat cut-off.

The recess extends over a distance which is for example of the order of half the length of the folder (the edge of the folder in its central part being marked by a vertical line in the thickness of the folder in Figure 2).

The folder 18 is fixed relative to the support. It is for example directly fixed to the support 12. It advantageously extends substantially parallel to the support 12.

In certain embodiments, as illustrated in FIG. 2, it is fixed to the support 12 at one or more raising elements 26. These raising elements 26 are for example fixed to the support on the upper face of the latter, for example in the vicinity of its lateral edges.

This or these elements 26 are in the form of a block of material.

Advantageously, these elements 26 are part of fixing modules via which the folder is fixed to the support 12. For example, each element 26 has a hole receiving a fixing element, such as a screw, which is also received in a hole of item 26.

For example, each raising element 26 has an upper face substantially parallel to the support. This face is advantageously flat. The folder 18 is for example fixed on this flat face.

Note that in some embodiments, this element 26 can be an integral part of the support.

Furthermore, the folder 18 has been described as being produced in the form of a plate-shaped element. Alternatively, this folder can be made in any form. In other words, in the context of the invention, the folder is to be understood as any cut-off element suitable for generating the prescribed cut-off within the output beam F.

The shaping optic 20 is configured to shape the light rays coming from the source 14 reaching it. By shaping, we mean that it is configured to modify the propagation properties of at least one of these light rays.

Here, the shaping optics is configured to at least deflect part of the light rays passing through it. Advantageously, this deviation is implemented by refraction.

Optionally, it is configured to diffuse at least part of the light passing through it. To this end, it comprises for example microstructures adapted to scatter light. These microstructures are for example formed in an external surface which it presents, such as for example its front face (turned to the right in Figure 2).

The shaping optics 20 advantageously comprises a lens, such as a converging lens. This lens is for example a convex or bi-convex lens having at least one curved face. This face is for example turned towards the closing glass 6.

Still with reference to FIG. 2, the collection surface 22 is configured to collect a part of the light rays coming from the source 14. It is further configured to deflect these rays towards the deflection surface 24. In particular, it is configured to collect light rays intended to form the F2 beams for lighting the portal points.

The rays reaching the collection surface 22 advantageously come directly from the source 14, that is to say that they have not been the subject of a prior reflection on the reflector 16.

The collection surface 22 is for example part of a collection element 22C of which it forms a face. The collection element 22C is fixed relative to the support. It is for example fixed to it by means of a fixing part. Alternatively, it is fixed to the reflector 16.

In some embodiments, the collecting element 22C forms an element of the reflector 16. For example, it extends from the front end region of the reflector illustrated in FIG. 2.

The collecting element 22 is located above the support, for example directly above the folder (at least in part). Advantageously, it is at a distance from the support adapted so that the collecting element does not intersect the light rays reflected by the reflector in the direction of the shaping optic or of the folder. This avoids the appearance of dark areas within the beam F1.

The collecting surface 22 forms an internal face of the collecting element 22C. It is turned towards support 12.

In order to deflect the light rays reaching it, this face is adapted to reflect the light coming from the source 14. In other words, the collection surface 22 is configured to deflect the light rays reaching it by reflection. For example, for this purpose, it has a surface metallization.

The exact shape of the collection surface 22 is for example known to a person skilled in the art. In practice, it is conditioned by the configuration of the source 14 and the reflector 16, as well as by the position of the deflection surface. For example, it has a generally concave shape.

Advantageously, the collection surface 22 is smooth. Here, heald is understood to mean that it has a surface devoid of a region forming a projection or depression with respect to its vicinity, in particular of such a region visible to the null eye for an observer. In particular, this face has no cusp or angular point. It is also advantageously devoid of steps, breaking lines, breaks, edges, etc.

In other words, the collection surface 22 is continuous in terms of tangency.

The deflection surface 24 is configured to collect the light rays reflected by the deflection surface 22 and to deflect these light rays towards the output optical P 20 for the formation of the beams F2 for the lighting of the portal point areas. In the context of the invention, this deflection surface 24 is common to all the beams F2. In other words, the beams F2 all come from light rays deflected by the deflection surface.

Advantageously, it is configured to deflect these light rays by reflection. For this purpose, it has for example a surface metallization, or else is made of a reflective material, such as for example aluminum.

The deflection surface 24 is advantageously provided on the support 12. For example, it is provided directly in the support. Alternatively, it is provided in a part attached to the support, such as for example the raising element 26.

Whatever the configuration envisaged, advantageously, it is arranged relative to the support at the edge thereof extending in the direction of the shaping optics. For example, it extends at least in part beyond this edge, as shown in Figure 2.

Advantageously, like the collection surface 22, the deflection surface is smooth. This term is understood in the same sense as previously, namely that the deflection surface has a surface devoid of region forming a projection or depression with respect to its vicinity, in particular of such region visible to the null eye for an observer. In particular, this face has no cusp or angular point. It is also advantageously devoid of steps, breaking lines, breaks, edges, etc.

In other words, the deflection surface 24 is continuous in terms of tangency.

This property of the deflection surface has the same meaning as in its central region. In other words, the configuration of the edges of the deflection surface is arbitrary. In particular, this edge can be delimited by such a line of break, a break, a step, etc. Thus, the support or the raising element may include another surface close to the deflection surface delimited from the latter by any geometric demarcation such as a step or a break line. However, the elements beyond this demarcation are outside the deflection surface as such.

Advantageously, the deflection surface 24 is substantially planar. It is then arranged in an inclined manner with respect to the horizontal (that is to say with respect to the plane of the support or of the folder). Its inclination is for example greater than 10 ° relative to the horizontal. For example, this inclination is substantially 30 °. In addition, the deflection surface 24 is turned towards the shaping optics.

As illustrated in FIG. 2, in summary, the deflection surface 24 is for example arranged so that an end portion is located beyond the edge of the support, and the opposite end portion is located above the support, the deflection surface being inclined relative to the horizontal while facing the shaping optics. Advantageously, it is plumb with the focal point of the shaping optics. In addition, advantageously, it is located under the plane of the folder 18.

Note that, alternatively, the deflection surface 24 is non-planar. In practice, its geometrical configuration is predetermined as a function of the configuration of the assembly formed by the source 14 and the collection surface 22, the configuration of the shaping optics and / or of the portal point zones to enlighten.

It is further noted that, as illustrated in FIG. 2, the deflection surface is advantageously disjoined from the cut-off element 18. For example, it extends away from the latter.

Advantageously, the deflection surface 24 is configured to receive only light rays contributing to the beams F2 for lighting portal points. Here, by only, it is not excluded that other light rays reach the deflection surface, but that these are marginal compared to the light rays contributing to the F2 beams. In other words, it is configured to return towards the shaping optics only light rays intended to contribute to the F2 beams.

For example, at least 90% of the light reaching the deflection surface 24 is intended to contribute to the beams F2.

The operation of the device 2 will now be described with reference to the Figures.

During operation of the device, the light source 14 is supplied with electrical energy, for example by means of a control module (not shown). In response, the source 14 emits light rays.

These light rays are emitted in the direction of the internal face of the reflector.

Part of these rays is then reflected by this internal face directly towards the shaping optics. When passing through this optic, these light rays are shaped by optics 20, and form the beam F which is delimited above by the cut generated by the folder 18.

Another part of the light rays emitted by the source is emitted towards the collection surface

22. These rays are then reflected therein in the direction of the deflection surface 24. They pass through the recess of the folder to reach the surface 24, are reflected therein in the direction of the optics 20, to which they eventually arrive after new passage through the plane of the folder via its recess. They are then shaped by the shaping optic so as to form the beams F2, which then illuminate the areas of portal points.

In the description above, the device has been described as being a lighting device for the implementation of dipped beam and portal point lighting functions.

In certain embodiments, it is advantageously further configured to implement one or more other lighting and / or signaling functions.

For example, it is suitable for the implementation of one or more lighting functions among a high beam function called "road function" and a fog function. Alternatively or in parallel, it is suitable for the implementation of one or more signaling functions among a direction change indication function, a daytime lighting function known by the English acronym DRF, for "Daytime Running Fight ”, A front light signature function, a position light function, a so-called“ Side-marker ”function, which comes from English and can be translated by side signaling.

Fes additional functions are for example implemented via a dedicated module arranged in whole or in part in the cavity 8, or via additional elements added to the module 10 itself.

The invention has several advantages. Indeed, it makes it possible in particular to carry out the lighting function for portal points in a simple manner, and in particular according to an approach which does not require having a shaping optic having a configuration specifically provided for this purpose.

In addition, the surfaces 22 and 24 for the implementation of this function are of simple invoice and do not require modification of other elements of the device. In particular, these surfaces are independent of the folder, so that the latter is not modified, which guarantees satisfactory sharpness and cut shape.

Furthermore, these surfaces are themselves simple in shape, so that their production is not very restrictive and is therefore repeatable in a reliable manner, thereby inducing a low dispersion in production.

Claims (10)

1. Lighting module for a motor vehicle, the lighting module (10) comprising: - a light source (14) adapted to generate light rays, a shaping optic (20) adapted to receive at least part of the light rays 5 coming from the light source and form an output light beam (F) of the lighting module from the light rays received, - a cut-off element (18) adapted to define a cut in the output beam, the lighting module further comprising: - a deflection surface (24) adapted to receive light rays from the source of 10 light and deflect said rays towards the shaping optics (20) for the formation of portal point lighting beams (F2) within the output beam (F), and - a collecting surface (22) adapted to collect a part of the light rays coming from the light source and deflect said light rays in the direction of the deflection surface (24) with a view to the formation of said point light beams gantry, 15, the deflection surface (24) being common to all the portal point lighting beams (F2). 2. Lighting module according to claim 1, wherein the deflection surface (24) is smooth. 3. Lighting module according to claim 1 or 2, wherein the deflection surface (24) is planar. 4. Lighting module according to any one of the preceding claims, in which the deflection surface (22) is disjoined from the cutting element (18). 5. Lighting module according to any one of the preceding claims, further comprising a support (12) on which the light source (14) is fixed, the deflection surface (24) being formed on said support. 6. Lighting module according to any one of the preceding claims, in which the shaping optic (20) has a focal point, the deflection surface lying perpendicular to said point. 25 focal and under said focal point. 7. Lighting module according to any one of the preceding claims, in which the deflection surface (24) is intended to return to the shaping optics only light rays configured to contribute to the spotlight beams. gantry (F2). 8. Lighting module according to any one of the preceding claims, in which the collecting surface (22) is smooth. 9. Lighting module according to any one of the preceding claims, further comprising a reflector (16) arranged to collect part of the light rays emitted by the light source and 5 for deflecting said light rays in the direction of the shaping optics (20) for the formation of a main portion (F1) of the output beam for lighting a portion of road located in front of the motor vehicle. 10. Lighting module according to claim 9, in which the main portion (Fl) of the output beam is delimited above by the cut defined by the cut element. 10 11. Lighting module according to any one of the preceding claims, characterized in that it is configured for the implementation of a vehicle low beam function. 12. Motor vehicle lighting device, characterized in that the lighting device (2) comprises a lighting module (10) according to any one of the preceding claims. 13. A lighting device according to claim 12, characterized in that the lighting device is adapted for the implementation of a dipped beam function and of a portal point lighting function. 14. Lighting device according to claim 13, characterized in that the lighting device (2) is further configured for the implementation of at least one lighting and / or signaling function other than the function dipped beam headlights and 20 gantry. 1/1 22C