EP1452795B1 - Vehicle headlamp with light emitting diodes - Google Patents

Abstract

The device has a reflector (400) for reflecting luminous rays produced by a luminous source that consists of series of electroluminescent diodes (401). Each electroluminescent diode is oriented in such a manner so that a part of its radiation attains a specific zone (403-p1 to 403-p3) of reflection on the reflector. Each specific zone provides a specific light distribution in the production of the luminous rays.

Description

The present invention relates to a motor vehicle headlamp device equipped with light emitting diodes. The main purpose of the invention is to propose an alternative solution to the projectors devices using halogen-type or discharge-type light sources, which pose a number of problems in the production of the projectors devices.

• des feux de position, d'intensité et de portée faible ;
• des feux de croisement, ou codes, d'intensité plus forte et de portée sur la route avoisinant 70 mètres, qui sont utilisés essentiellement la nuit et dont la répartition du faisceau lumineux est telle qu'elle permet de ne pas éblouir le conducteur d'un véhicule croisé ;
• des feux de route longue portée, et des feux de complément de type longue portée, dont la zone de vision sur la route avoisine 200 mètres, et qui doivent être éteints lorsque l'on croise un autre véhicule afin de ne pas éblouir son conducteur ;
• des projecteurs perfectionnés, dits bimodes, qui cumulent les fonctions de feux de croisement et de feu de route en incorporant un cache amovible ;
• des feux anti-brouillard.

The field of the invention is, in general, that of motor vehicle headlights. In this field, we know different types of projectors, among which we find essentially:

• position, intensity and low range lights;
• low beam, or codes, of greater intensity and range on the road of about 70 meters, which are used mainly at night and whose distribution of the light beam is such that it does not dazzle the driver of a crossover vehicle;
• long-range headlamps, and long-range supplement lights, whose vision zone on the road is approximately 200 meters, and which must be extinguished when crossing another vehicle so as not to dazzle its driver;
• advanced projectors, called dual mode, which combine the functions of low beam and high beam by incorporating a removable cover;
• fog lights.

• une fonction dite DBL (Dynamic Bending Light en anglais pour lumière virage mobile) : cette fonction permet d'orienter un faisceau lumineux produit par une source lumineuse, par exemple en déplaçant un réflecteur par rapport à la source de lumière à laquelle il est associé, de telle sorte que lorsque le véhicule aborde un virage, la route soit éclairée de façon optimale ;
• une fonction dite FBL (Fixed Bending Light en anglais pour lumière virage fixe): cette fonction a pour vocation d'éclairer progressivement le bas-côté de la route lorsque le véhicule effectue un virage ; à cet effet, on prévoit une source lumineuse supplémentaire qui vient compléter progressivement les feux de croisement ou de route lors de la négociation d'un virage ;
• une fonction dite DRL (Day Running Light): cette fonction, couramment appelée feu de circulation diurne, assure l'allumage permanent de projecteurs du dispositif projecteur, notamment pour signaler aux piétons la présence du véhicule en circulation et ainsi éviter les chocs piétons ;
• une fonction dite Town Light en anglais, pour feu de ville. Cette fonction assure l'élargissement d'un faisceau de type feu de croisement tout en diminuant légèrement sa portée ;
• une fonction dite Motorway Light en anglais, pour feu d'autoroute. Cette fonction assure une augmentation de la portée d'un feu de croisement ;
• une fonction dite AWL (Adverse Weather Light en anglais, pour feu de mauvais temps). Cette fonction assure une modification d'un faisceau de feu de croisement de telle sorte que le conducteur n'est pas ébloui par un reflet de son propre projecteur ;
• une fonction dite Overhead Light en anglais, pour feu surélevé. Cette fonction assure une modification d'un faisceau de feu de croisement de telle sorte que des portiques situés en hauteur sont éclairés de façon satisfaisante au moyen des feux de croisement.

Moreover, in addition to these conventional main projectors, various improvements have gradually appeared. We have thus developed elaborate functions, called advanced functions, among which we find in particular:

• a function called DBL (Dynamic Bending Light): this function is used to orient a light beam produced by a light source, for example by moving a reflector relative to the light source with which it is associated, so that when the vehicle approaches a turn, the road is illuminated optimally;
• a function called FBL (Fixed Bending Light): this function is intended to gradually illuminate the side of the road when the vehicle turns; to this end, there is provided an additional light source which gradually complements the low beam or road when negotiating a turn;
• a function called DRL (Day Running Light): this function, commonly called daytime running light, ensures the permanent lighting of headlamps of the projector device, in particular to signal pedestrians the presence of the vehicle in circulation and thus avoid pedestrian impact;
• a function called Town Light in English, for town fire. This function ensures the widening of a beam type dipped beam while slightly decreasing its range;
• a function called Motorway Light in English, for highway lights. This function ensures an increase in the range of a dipped beam;
• a function called AWL (Adverse Weather Light in English, for fire of bad weather). This function ensures a modification of a beam of passing beam so that the driver is not dazzled by a reflection of his own projector;
• a function called Overhead Light in English, for raised fire. This function ensures a modification of a beam of low beam so that gantries located at height are illuminated satisfactorily by means of low beam.

The DBL, FBL, AWL, Town Light, Motorway Light and Overhead Light functions are grouped together as AFS functions.

The document US 2001/0019486 shows such a device.

The projector device according to the invention will be essentially described in use as crossing lights. It could nevertheless be used in any other projector device cited, or intervene in one of the mentioned functions. Describing the invention in the context of low beam is therefore in no way limiting to this application alone.

Moreover, there are two main families of projectors that correspond to two distinct arrangements of elements constituting the projector:

The first family is that of so-called elliptical projectors. In this type of projectors, a spot of light concentration is generated by a light source arranged in a mirror. Typically, the light source is disposed at the first focus of an ellipsoid-shaped mirror, said spot forming at the second focus of the mirror. The spot of light concentration is then projected onto the road by a convergent lens, for example a plano-convex lens.

The second family is that of so-called reflection projectors with complex surface, or parabolic. In this type of projectors, a light beam is generated by a small light source disposed in a reflector, or mirror. The projection on the road of the light rays reflected by a suitable reflector makes it possible to directly obtain a light beam obeying the various constraints imposed by the standards. This family of projectors includes so-called free-surface projectors, or complex surfaces, which make it possible to obtain directly a light beam having a desired cut-off line. The device according to the invention relates more particularly to this family of projectors.

A parabolic projector device, for example of the code-fire type, of the state of the art is schematically represented in FIG. figure 1 by a sectional view. A code light 100 comprises, in a conventional manner, in a housing 105, essentially a reflector 101, a light source 102 emitting light rays 103, disposed in the vicinity of the focus of the reflector 101, and an output surface 104 of the beam The luminous beam 106 is defined as a group of light rays that are actually emitted by a searchlight at the exit surface 104, the volume illuminated by the light beam corresponding to the driver's viewing zone; by light rays means all the light signals emitted by the light source 102. In the state of the art as in the device according to the invention, the light rays 103 are emitted either directly to the exit surface 104 , or indirectly after suffering any deviations and / or reflections.

The figure 2 shows the reflector 101 seen from the front. The reflector 101 is virtually divided into several distinct zones, each of the zones making a contribution rigorously defined in the constitution of the light beam 106 emitted by the projector. A projection 300, on a plane, of this light beam is shown in FIG. figure 3 . In the case of a dipped beam, the light projection 300 is bounded horizontally by a cut line 306.

The light projection 300 is artificially cut into distinct regions. A first region 301 and a second region 302 constitute the so-called range regions of the light beam. It is in these areas that the intensity of the beam must be maximum. It must provide a satisfactory visibility in the axis at 70 meters. A third region 303 and a fourth region 304 constitute the so-called comfort regions. They provide a satisfactory visibility at about 40 meters. A fifth region 305 constitutes the so-called width region. It makes it possible to obtain visibility downwards, that is by lighting up the bitumen, which is satisfactory at about 30 meters.

The light source 102 of the projector device contributes to each of the regions just mentioned by reflecting on the reflector 101 differently depending on the reflection zones where the image of the light source 101 is formed. may consider that the first bearing region 301 and the second bearing region 302 of the light beam consist essentially of images of the light source reflecting respectively in a first zone 201 and in a second zone 202 of the reflective surface of the reflector 101 These two zones are approximately horizontal, that is to say disposed in the vicinity of a central and horizontal plane of the projector device; indeed, the images of the light source 102 in these areas must be substantially horizontal to be disposed just below the cutoff line 306 of the light projection 300; and, in view of the generally cylindrical shape of the halogen lamp or discharge lamp type light sources, the length, disposed along the projection axis of the projector, being much smaller than the width, it is much easier to make coincide correctly these images below the cut line when they are horizontal, so less spread out in height than vertical images. This constraint, which imposes a type of shape for the reflectors of the state of the art, is therefore restrictive.

Moreover, it may be considered that the first comfort region 303 and the second comfort region 304 of the light beam essentially consist of images of the light source reflecting respectively in a third zone 203 and in a fourth zone 204 of the reflective surface of the reflector 101. Finally, it can be considered that the region of width 305 of the light beam consists essentially of images of the light source reflecting in a fifth zone 205 of the reflective surface of the reflector 101. The complex surface defining the different reflection zones is the subject of calculations known to those skilled in the art to obtain the desired light beam.

A first problem encountered with this type of projector of the state of the art is that a significant part of the light radiated by the light source is lost: in fact, the light sources used have an omnidirectional radiation, that is to say diffused in all directions of space. Due to the shape of the projectors, more particularly the presence of cheeks which limit the height of the reflectors, part of the light rays emitted by the source is not used in the beam.

A second problem encountered with the projectors of the state of the art is their size: indeed, as we have seen above, the shape of the complex surface is mathematically defined to create, from a single light source, the light beam as a whole. The complex surface is formed of a single piece, and therefore voluminous, because it can not be split into several elements. A third problem with these projectors is that they consume a lot of energy. A fourth problem is that these light sources are particularly exothermic, and it is necessary to provide in the projectors different devices for removing heat. Finally, a last problem is related to the unicity of the light source: when it no longer works, it is the entire beam of light produced by the projector is lacking.

• tout d'abord, ce type de diodes ne rayonne pas de façon omnidirectionnelle, mais rayonne dans un demi espace opposé au substrat qui supporte sa jonction P-N ; ainsi, en utilisant un rayonnement plus directif que les lampes halogènes ou à décharge de l'état de la technique, la quantité d'énergie perdue est moins importante.
• ensuite, on a récemment perfectionné ces diodes en terme d'intensité de rayonnement ; elles peuvent désormais rayonner un flux d'environ 100 lumens. De plus, elles émettent un rayonnement, depuis longtemps dans le rouge mais désormais également dans le blanc. La quantité de chaleur qu'elles dégagent est limitée, et un certain nombre de contraintes, liées à la dissipation de la chaleur dans les dispositifs projecteurs de l'état de la technique, disparaissent.
• enfin, les diodes consomment moins d'énergie, même à intensité de rayonnement égal, que les lampes à décharge ou les lampes halogènes ; elles sont peu encombrantes, et leur forme particulière offre des possibilités nouvelles pour la réalisation et la disposition des surfaces complexes qui leur sont associées.

It is an object of the invention to respond to all the problems that have just been mentioned while avoiding implementation constraints mentioned. In general, it is proposed in the invention to incorporate light-emitting diodes in the various known projector devices. The invention advantageously benefits from several properties of light-emitting diodes:

• firstly, this type of diode does not radiate omnidirectionally, but radiates in a half space opposite to the substrate that supports its PN junction; thus, using a more directional radiation than the halogen or discharge lamps of the state of the art, the amount of energy lost is less important.
• then, these diodes have recently been perfected in terms of radiation intensity; they can now radiate a flux of about 100 lumens. In addition, they emit radiation, for a long time in the red but now also in the white. The amount of heat they release is limited, and a number of constraints, related to the heat dissipation in the projector devices of the state of the art, disappear.
• finally, the diodes consume less energy, even at equal radiation intensity, than discharge lamps or halogen lamps; they are compact, and their particular shape offers new possibilities for the realization and layout of complex surfaces associated with them.

The invention therefore essentially relates to a projector device, intended to emit at least one type of light beam, comprising at least one light source and at least one reflecting surface for reflecting light rays produced by the light source, characterized in that the light source comprises at least one element of the electroluminescent diode type.

• le dispositif projecteur émet au moins un faisceau lumineux de type de ceux émis par un feu de croisement, ou par un feu de position, ou par un feu de route, ou par un feu anti-brouillard, ou correspondant à une fonction quelconque parmi les fonctions AFS, ou à une fonction DRL. Il peut émettre un faisceau lumineux à coupure, notamment par un paramétrage approprié des surfaces réfléchissantes associées à la ou aux sources lumineuses
• chaque élément de type diode électroluminescente, dont le rayon lumineux produit est un rayonnement localisé dans un demi espace, est orienté de telle sorte qu'au moins une partie de son rayonnement atteigne, sur la surface réfléchissante, une zone spécifique de réflexion qui lui est dédiée, chaque zone spécifique étant plus spécialement destinée à une contribution particulière dans la production du faisceau lumineux.
• les différentes zones spécifiques de réflexion sont compartimentées.
• la contribution particulière est soit une contribution de portée, soit une contribution de largeur, soit une contribution de confort.
• chaque diode électroluminescente du dispositif projecteur est orientée pour que la totalité de son rayonnement atteigne la zone spécifique de réflexion qui lui est dédiée.
• au moins deux diodes électroluminescentes sont utilisées pour la contribution de portée,
• le nombre de diodes électroluminescentes est par exemple compris entre 2 et 20, ou entre 4 et 14 (pour la contribution de portée ou toute autre contribution).
• au moins une zone spécifique de réflexion destinée à une contribution de portée est une zone non horizontale de la surface réfléchissante, ce qui est une caractéristique tout à fait spécifique à l'invention et que l'on ne rencontre pas avec les sources lumineuses plus conventionnelles
• la source lumineuse est complétée par un élément rayonnant de type lampe halogène ou lampe à Xénon (appelée aussi lampe à décharge ou lampe HID en anglais) pour générer un faisceau lumineux donné , on a alors dans cette variante un éclairage "hybride" tout à fait innovant.
• l'élément rayonnant de type lampe halogène ou lampe à Xénon rayonne sur une zone spécifique de réflexion qui lui est dédiée, ladite zone étant utilisée de préférence pour une contribution de portée.
• l'allumage d'au moins un élément de type diode électroluminescente peut être commandé indépendamment de l'allumage des autres éléments de la source lumineuse.
• selon une première variante, les différentes diodes électroluminescentes que comporte la source lumineuse sont proches les unes des autres, rassemblées dans une configuration telle qu'on peut alors assimiler l'ensemble des diodes à une unique source lumineuse conventionnelle telle une lampe halogène. Dans ce cas, on peut ainsi regrouper les diodes en "barillet", c'est-à-dire de façon à ce qu'elles soient approximativement disposées les unes à côté des autres sur un support de révolution comme un cylindre,
• selon une seconde variante, chaque élément de type diode électroluminescente est séparé des autres, et est notamment disposée dans un compartiment qui lui est dédié de la surface réfléchissante, ledit compartiment comportant une des zones spécifiques de réflexion, les différents compartiments étant disposés de façon adjacente ou séparée. Dans ce cas, on a alors autant de sources lumineuses que de diodes, même si c'est l'ensemble des diodes qui contribue à générer un faisceau donné. Les miroirs peuvent ainsi être répartis en matrice de miroirs. Tous les miroirs peuvent être contigus ou séparés les uns des autres, ils peuvent être mécaniquement solidarisés ou solidarisables, ne faire qu'une pièce ou non. On a alors des modules miroir/diode, que l'on peut assembler de façon flexible les uns par rapport aux autres, ce qui est très intéressant du point de vue du deign du projecteur dans son ensemble.

The projector device according to the invention may furthermore have one or more of the following secondary characteristics:

• the headlamp device emits at least one light beam of the type emitted by a low beam, or a position light, or a high beam, or a fog lamp, or corresponding to any function among the AFS functions, or to a DRL function. It can emit a cut-off light beam, in particular by appropriate parameterization of the reflecting surfaces associated with the light source (s)
• each light-emitting diode-like element, whose light ray is a radiation located in a half space, is oriented so that at least a portion of its radiation reaches, on the reflecting surface, a specific reflection zone which is dedicated, each specific area being more specifically intended for a particular contribution in the production of the light beam.
• the different specific areas of reflection are compartmentalized.
• the particular contribution is either a contribution of scope, a contribution of width, or a contribution of comfort.
• each light emitting diode of the projector device is oriented so that all of its radiation reaches the specific reflection zone which is dedicated thereto.
• at least two light-emitting diodes are used for the range contribution,
• the number of light-emitting diodes is for example between 2 and 20, or between 4 and 14 (for the contribution of range or any other contribution).
• at least one specific reflection area intended for a bearing contribution is a non-horizontal area of the reflecting surface, which is a feature quite specific to the invention and which is not encountered with the more conventional light sources
• the light source is completed by a radiating element such as halogen lamp or Xenon lamp (also called a discharge lamp or HID lamp in English) to generate a given light beam, there is then in this variant a "hybrid" lighting quite innovative.
• the radiating element of halogen lamp type or Xenon lamp radiates on a specific reflection zone dedicated thereto, said zone being preferably used for a contribution of scope.
• the ignition of at least one light emitting diode element can be controlled independently of the ignition of the other elements of the light source.
• according to a first variant, the various light-emitting diodes that the light source comprises are close to each other, gathered in a configuration such that we can then assimilate all the diodes to a single conventional light source such as a halogen lamp. In this case, it is thus possible to group the "barrel" diodes, that is to say so that they are arranged approximately next to each other on a support of revolution like a cylinder,
• according to a second variant, each light-emitting diode-type element is separated from the others, and is in particular arranged in a compartment which is dedicated to it of the reflecting surface, said compartment comprising one of the specific zones of reflection, the different compartments being arranged in an adjacent manner or separate. In this case, there are then as many light sources as diodes, even if it is the set of diodes that contributes to generate a given beam. The mirrors can thus be divided into a matrix of mirrors. All the mirrors can be contiguous or separated from each other, they can be mechanically solidarized or solidarisable, to make only one part or not. We then have mirror / diode modules, which can be assembled in a flexible manner with respect to each other, which is very interesting from the point of view of the design of the projector as a whole.

The two variants can be combined, having in the same projector at the same time diodes separated from each other and assembled diodes assimilable to a single conventional source.

Another object of the invention is a motor vehicle equipped with at least one projector device having at least one of the characteristics that have just been specified.

• à la figure 1, déjà décrite, une représentation schématique d'un dispositif projecteur de l'état de la technique ;
• à la figure 2, également déjà décrite, une représentation schématique d'un découpage, utilisé dans l'état de la technique, de la surface réfléchissante d'un réflecteur ;
• à la figure 3, également déjà décrite, une représentation schématique des différentes régions constituant un faisceau lumineux ;
• à la figure 4, un premier exemple de réalisation d'un réflecteur utilisé dans le dispositif projecteur selon l'invention;
• à la figure 5, un deuxième exemple de réalisation d'un réflecteur utilisé dans le dispositif projecteur selon l'invention.

The invention and its various applications will be better understood by reading the following description and examining the figures that accompany it. These are presented only as an indication and in no way limitative of the invention.

• to the figure 1 , already described, a schematic representation of a projector device of the state of the art;
• to the figure 2 , also already described, a schematic representation of a cutting, used in the state of the art, of the reflective surface of a reflector;
• to the figure 3 , also already described, a schematic representation of the different regions constituting a light beam;
• to the figure 4 , a first embodiment of a reflector used in the projector device according to the invention;
• to the figure 5 , a second embodiment of a reflector used in the projector device according to the invention.

The figure 4 is a front view of a reflector 400, intended to be used in a projector according to the invention, whose overall shape is very close to that of the reflectors of the state of the art. The light source, however, consists of a plurality, eight in the example shown, of light-emitting diodes 401 which are arranged in a star around a central position 402 of the reflector 400. The eight diodes 400 are regularly spaced around the central portion 402.

In the example shown, and, more generally, advantageously in the invention, each diode participating in the constitution of a light beam is associated bijectively with a particular area of the reflecting surface used to obtain the desired light beam. So, on the figure 4 , each of the eight diodes is dedicated to a specific area 403, which is reserved for it, of the reflecting surface, the different areas being symbolically delimited by a solid line.

The use of the diodes 401, whose radiation remains less intense than that of the light sources used in the state of the art, implies on the one hand the multiplicity of these diodes for producing a projector device producing light beams identical to those of the state of the art, and on the other hand an increase in the specific surface area dedicated to regions of high intensity of the light beam. Thus, to obtain a light beam of the type of that represented in FIG. figure 3 it is necessary to multiply the zones dedicated to the diodes which bring more particularly their contribution to the regions of range of the light beam. In the example considered, we reserve three specific zones, respectively 403-p1, 403-p2 and 403-p3, which are therefore associated with three different diodes, to produce images of each diode which will contribute to the intensity of the regions of scope. On the figure 4 it can be seen that, although two horizontal reflection zones, 403-p1 and 403p-2, which contribute to the intensity of the bearing regions, the zone 403-p3, which contributes also at the intensity of the reach regions, is not a horizontal reflection zone. On the other hand, there are still zones of reflection among the remaining zones that contribute to the regions of comfort and width. Each reflection zone is constructed as a complex surface whose calculations are carried out so that it contributes appropriately to the production of the light bleam.

Another possible example of arrangement of light emitting diodes 400 is a so-called barrel arrangement. In this arrangement, there is always a set of light-emitting diodes around the central portion 402, but as tightly as possible so that the total luminous flux produced is comparable to that of a halogen lamp or Xenon usually used, in particular in terms of omnidirectionality of the luminous flux produced.

One of the advantages of the devices according to the invention is that, because of the square shape of the emitting surface of the diodes now used, the reflection zones reserved for the light beam bearing regions are not necessarily the horizontal zones, ie the areas disposed in the vicinity of a horizontal and central plane of the projector device. This absence of constraint leaves a great diversity of choices in the distribution, on the reflecting surface 400, of the role of the different reflection zones. Of course, the emitting surface of the diodes may not be strictly square, it may have more varied geometric shapes (rectangle, triangle ...), its specificity being to be generally a substantially flat surface.

Another advantage is that it is possible to compartmentalize, separate, physically the different areas of reflection. In this case, the projector device according to the invention is not necessarily a single-block part, but it consists of a set of compartments that can be distributed in different locations of the front face, for example, the vehicle. Each compartment has at least one diode and a specific reflection surface. For example, it is possible, for example, to have on the front of a vehicle a set of diodes which are not necessarily close to each other, but which, associated with appropriate reflecting surfaces, contribute to the production of the same light beam. . In other examples, the different compartments may, however, be adjacent to each other so as to give the impression of a single-block projector device.

The diodes can thus be arranged differently from the arrangement approaching that of the state of the art; the figure 5 thus shows a reflector 500 or a multiplicity of diodes 501 are arranged only along a central vertical axis 504 of the reflector, the different reflecting zones 502 being arranged, possibly compartmentally, on either side of the vertical axis 504.

Another advantage of the devices according to the invention is that the malfunction of a diode does not cause the total stop of the projector device associated with it; indeed, even if the light beam is substantially modified, the other diodes present in the projector device temporarily provide satisfactory illumination.

In order to reduce the consumption required for the proper functioning of the projector to which they belong, the diodes are oriented so that the light rays which they emit in a radiation cone, which belongs to a half space, reach all or almost all specific area of the reflective surface of the reflector 400 with which they are associated.

Another advantage of the invention is that the ignition of each diode can be controlled independently. Thus, if we obtain a first light beam when a set of diodes radiate, the extinction of one or more of the diodes belonging to this set provides a second light beam different from the first.

The projectors devices according to the invention can also be supplemented by light sources of halogen lamp type or discharge lamp also called Xenon lamp. This complement can be interesting to reinforce the intensity of the zones of reach. The invention therefore also covers hybrid projectors whose light source is a combination of one or more light-emitting diodes and a halogen or discharge lamp. The halogen lamp or the discharge lamp is then advantageously reserved for the bearing regions, and the diodes make their contribution, or are reserved, to the comfort or width regions of a light beam.

Claims (16)

1. Headlight device, which is designed to emit at least one type of light beam of the dipped type, the light projection (300) of which is delimited horizontally by a cut-off line (306), comprising at least one source of light and at least one reflective surface in order to reflect rays of light which are produced by the source of light, the (or at least one of the) source(s) of light comprising a plurality of elements of the electroluminescent diode type (401; 501),
   characterised in that the said light projection (300) comprises a first region (301) and a second region (302) which constitute so-called range regions of the of light beam, situated just below the said cut-off line (306), and a third region (303) and a fourth region (304) which constitute the so-called comfort regions, each element of the electroluminescent diode type (401; 501) being oriented such that at least part of its radiation reaches, on the reflective surface, a specific area (403; 502) of reflection which is dedicated to it, each specific area (403; 502) being more especially designed for a particular contribution in the production of the light beam, with specific areas contributing to the intensity of the range regions, and specific areas contributing to the comfort regions.
2. Headlight device according to the preceding claim, characterised in that the different specific reflection areas are compartmentalised.
3. Headlight device according to at least one of claims 1 or 2, characterised in that the said light projection (300) comprises a fifth region (305) which constitutes the so-called width region, with specific areas contributing towards the width regions.
4. Headlight device according to at least one of the preceding claims, characterised in that each electroluminescent diode (401; 501) of the headlight device is oriented such that all of its radiation reaches the reflection specific area (403; 502) which is dedicated to it.
5. Headlight device according to at least one of claims 3 or 4, characterised in that at least two electroluminescent diodes are used for the range contribution, the number of electroluminescent diodes being contained for instance between 2 and 20, or between 4 and 14.
6. Headlight device according to at least one of the preceding claims, characterised in that at least one specific reflection area (403-p3) which is destined for a range contribution is a non-horizontal area of the reflective surface.
7. Headlight device according to claim 6, characterised in that the said specific reflection area (403-p3) which is destined for a range contribution is a vertical area of the reflective surface.
8. Headlight device according to claim 7, characterised in that two specific reflection areas (403-p1; 403-p2) which are destined for a range contribution are horizontal areas of the reflective surface.
9. Headlight device according to claim 8, characterised in that the said light projection (300) comprises a fifth region (305) which constitutes the said width region, and in that the other areas of the reflective surface are specific reflection areas which are destined for a contribution to the comfort and width regions of the said light beam.
10. Headlight device according to at least one of the preceding claims, characterised in that the (or at least one of the) source(s) of light is completed by a radiating element of the halogen lamp, discharge lamp or xenon lamp type.
11. Headlight device according to the preceding claim and claim 3, characterised in that a radiating element of the halogen lamp or xenon lamp type radiates on a specific reflection area which is dedicated to it, the said area preferably being used for a range contribution.
12. Headlight device according to at least one of the preceding claims, characterised in that the lighting of at least one element of the electroluminescent type (401; 501) can be controlled independently from the lighting of the other elements of the source of light.
13. Headlight device according to at least one of the preceding claims, characterised in that the different electroluminescent diodes (401; 501) are assembled together, for example in a cluster, or are separated from one another.
14. Device according to at least one of the preceding claims, characterised in that the diodes are associated with reflective surfaces consisting of a matrix / matrices of mirrors.
15. Headlight device according to claim 2, characterised in that each element of the electroluminescent diode type (401; 501) is disposed in a compartment which is dedicated to it, of the reflective surface, the said compartment comprising one of the specific reflection areas (403; 502), the different compartments being arranged in a manner which is adjacent or separate.
16. Motor vehicle which is equipped with a headlight device according to at least one of the preceding claims.

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