EP1790906A1 - Lighting or signalling device for automotive vehicle - Google Patents

Lighting or signalling device for automotive vehicle Download PDF

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Publication number
EP1790906A1
EP1790906A1 EP06291787A EP06291787A EP1790906A1 EP 1790906 A1 EP1790906 A1 EP 1790906A1 EP 06291787 A EP06291787 A EP 06291787A EP 06291787 A EP06291787 A EP 06291787A EP 1790906 A1 EP1790906 A1 EP 1790906A1
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EP
European Patent Office
Prior art keywords
module
module according
zone
light
main
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP06291787A
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German (de)
French (fr)
Other versions
EP1790906B1 (en
Inventor
Christophe Valois
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Vision SAS
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Valeo Vision SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Priority to PL06291787T priority Critical patent/PL1790906T3/en
Priority to EP10177010.5A priority patent/EP2299167B1/en
Priority to PL10177010T priority patent/PL2299167T3/en
Publication of EP1790906A1 publication Critical patent/EP1790906A1/en
Application granted granted Critical
Publication of EP1790906B1 publication Critical patent/EP1790906B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/50—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/162—Incandescent light sources, e.g. filament or halogen lamps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
    • F21S41/336—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors with discontinuity at the junction between adjacent areas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/337—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector having a structured surface, e.g. with facets or corrugations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/36—Combinations of two or more separate reflectors
    • F21S41/365—Combinations of two or more separate reflectors successively reflecting the light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/338—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector having surface portions added to its general concavity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/17—Arrangement or contour of the emitted light for regions other than high beam or low beam
    • F21W2102/19—Arrangement or contour of the emitted light for regions other than high beam or low beam for curves

Definitions

  • the invention relates to lighting and / or signaling devices for automobiles, and in particular to projectors for a motor vehicle.
  • She is particularly interested in light beams on the side of vehicles.
  • light beams illuminating in a general / oblique mean orientation with respect to the longitudinal axis X of the vehicle (axis generally coincident with or little different from the orientation of the optical axis of the other beams, so-called principal, emitted by the projectors).
  • It may also be light beams providing a lighting function known as Anglo-Saxon "cornering", or a lighting in the corners, the purpose of which is to illuminate further on the sides of the vehicle, to allow a better visibility to the driver of the vehicle (lighting function), but also to allow the vehicle's external environment to better discern the vehicle (signaling function)
  • This function is, in itself, defined by a specific photometric grid provided for in the regulations in force.
  • optical module is meant a set of components comprising at least one reflector, its associated light source (s) and possibly associated optical elements of the dioptric element (Fresnel lens, etc.) type, and capable of emitting at least one given light beam.
  • a first solution consisted in turning inside the projector the module intended to illuminate laterally with respect to the other optical modules: the projector is kept in its usual configuration, with its main modules, for example the one emitting the beam code or road, and the FBL or Cornering add-on module is rotated so that its optical axis is at an angle to the optical axis of the other modules.
  • this solution has its limitations: a turned module is more bulky inside the projector, including obliquely arranged lamp connectors, a reflector taking up more space. But it is the compactness that we are looking for more and more in a projector. In addition, thus turning the module tends to cause a loss of luminous flux emitted by the module: the more oblique rays tend to no longer be able to leave the closing mirror of the projector. Therefore, depending on the shape of the projector, the amplitude of the rotation of the module is therefore more or less limited, and it is difficult to guarantee that the beam emitted by the module and actually leaving the projector is compatible with the regulations in force.
  • the purpose of the invention is therefore to remedy the drawbacks of this first solution, notably by proposing a new lateral lighting module design, which is notably easier to produce, more efficient, or even less constraining as regards the design of the module. and / or the projector including the module in question.
  • the optical module according to the invention is intended to equip a lighting and / or signaling device for a motor vehicle. It comprises at least one main reflector associated with at least one light source in order to emit a main light beam. It also comprises at least one additional reflecting zone outside said main reflector and which is adapted to receive a portion of the light coming directly or indirectly from said light source and to return it to make a secondary light beam in a preferred direction different from the direction privileged of the main light beam.
  • main beam some of the light intended to make a given beam
  • another beam (said to be secondary) of different orientation, this use being controlled so as not to disturb the optical performance, photometry and distribution of the main beam.
  • This can be achieved, for example, by using light in the less photometrically useful part of the main beam, and / or by recovering light that otherwise would have been lost.
  • the fact that the additional reflective zone is out of the main reflector means that it may be adjacent, close to the reflector, but that it is not an integral part thereof, which makes it possible, as mentioned above, to standardize the reflector. main.
  • the distance between the additional reflective zone and the optical axis is greater than or equal to the distance between the edges of the main reflector and the optical axis. That is, for each point of the additional reflective zone, the shortest distance from this point to the optical axis is preferably greater than or equal to the shortest distance between the edges of the main reflector and the optical axis.
  • the additional reflective zone is able to receive a part of the light coming only directly from said light source.
  • Direct light from the light source or “coming directly from the light source” means the rays emitted by the light source that have not been previously reflected.
  • light indirectly from the light source means the rays that have been previously reflected at least once after their emission by the light source.
  • An optical module is understood to mean a set of components comprising at least one reflector and a light source, and which may be a unit lighting element, such as an anti-fog module independent of the vehicle headlamp, or may be a component intended to be integrated into a projector.
  • the preferred direction of the main light beam can be likened to its optical axis.
  • This axis can be confused or not with the longitudinal axis of the vehicle equipped with the device according to the invention: It can be effectively confused, or, for example, be a little inclined in a substantially vertical plane and / or horizontal with respect to the longitudinal axis of the vehicle.
  • its optical axis can be slightly inclined, 0.5 to 2 ° vertically, and 0 to 15 °, including 5 to 10 °, horizontally.
  • a preferred direction "different" from the preferred direction of the main light beam has been mentioned above.
  • This angular difference between the two beams, the main and the deviated is preferably significant, preferably at least 10 °, especially between 25 ° and 70 °, especially between 30 and 60 °.
  • This gap is preferably in a substantially horizontal plane, although the invention also includes a difference in orientation having both a component in a horizontal plane and a component in a vertical plane.
  • the secondary beam preferably has a distribution of 0 to 90 °. "Distribution” means the angle between the radius of the secondary beam having the smallest angular difference with the optical axis of the optical module and the radius of the secondary beam having the greatest angular difference with the optical axis of the optical module.
  • the additional reflective zone makes it possible to reflect on the 5 to 10% side of the luminous flux coming directly from the light source.
  • the secondary beam is sufficient to generate illumination, so that it is not necessary to use a converging lens or other optical means to change the direction or distribution of the rays reflected by the additional reflective zone .
  • the present invention can be adapted to projectors whose optical module, composed of a lamp and a reflector, is devoid of a lens.
  • the main light beam is an unbroken beam, of the road beam type, or a cut-off beam, particularly an oblique cut-off beam, such as a coded beam, or a flat-cut beam beam beam. anti-fog.
  • the secondary light beam is a cut-off beam, in particular a complementary beam of a fixed turn code function or a beam providing a lateral lighting function called "cornering".
  • the additional reflecting zone is arranged so that said secondary light beam illuminates an additional lighting zone, extending sufficiently broadly out of the area illuminated by said main light beam to allow a lighting on the sides and thus ensure a lateral lighting function of the "cornering" type.
  • the angular difference between the preferred directions of the two beams is preferably about 45 °, and the distribution of the secondary beam is preferably 30 to 60 °.
  • the main beam on the one hand and the secondary beam on the other hand are cut-off beams, with in particular the same type of cutoff, flat or oblique.
  • the optical module comprises only one additional reflecting zone. There is thus a module for equipping the right front of the vehicle with a given additional reflective zone, and a module for equipping the left front of the vehicle, with a different reflecting zone in its positioning in the module than in the right-hand module.
  • the optical module comprises at least two additional reflecting zones, in particular two zones disposed symmetrically with respect to the main reflector.
  • This variant offers the advantage of having modules that can adapt indifferently to the right and left sides of the vehicle, which simplifies the production and storage of modules: It has the same optical element, that the module is intended to equip a right projector or a left automotive projector, that the module is intended to integrate into a projector or is an independent unit.
  • the additional reflective zone (s) is (are) integrated (s) to a piece of style of the module.
  • style piece is understood any component that comes to dress the optical modules and, for example, ensure a surface continuity between the modules and the walls of the housing or the junction box housing / closing ice.
  • These style pieces have a cosmetic vocation, and it is generally sought that they have no, or as little as possible, impact, optically, on the light beams emitted by the module. They can be an integral part of the module, especially when the module is a unitary product, such as an anti-fog module for example. They can also be associated, in contact with the modules, and be part of the projector in which the module must be integrated.
  • the integration of the additional reflective zone (s) in a style piece can be done in different ways: it may be, for example, to superficially modify the piece of style locally. It may also be to insert the reflective area in a piece of style, in the form of an insert that is just fixed to the room by any mechanical means (clipping .%) or by gluing.
  • the additional reflective zone (s) is (are) for example disposed in the mask of the module at least partly surrounding the main reflector or is (are) integral with said mask or is (are) arranged (s) near said mask.
  • mask (“bezel” in English) designates the style piece ensuring a surface continuity between the reflector and the rest of the module (or projector).
  • the mask is preferably substantially locally reflective to obtain the desired additional reflective area (s), and substantially diffusing / absorbing over the remainder of its visible surface.
  • the mask can be made diffusing by graining, the additional reflective zones being aluminized but not grained.
  • the area has preferably a geometrical shape studied so as to respect the photometry required.
  • the supplementary reflective zone comprises a central portion optically defined as a reflector, and a peripheral portion which is a junction zone with the rest of the the room.
  • the zone at least in this central portion, may thus comprise a plurality of facets, having in particular a plurality of focal lengths.
  • the main reflector is for example of complex surface type, or of type with parabolic generators, or of elliptical type.
  • the invention also relates to the projector equipped with at least one of these optical modules, and the car equipped with one of these modules, alone or integrated into a projector.
  • FIG. 1 represents in perspective an optical module M comprising a reflector R and a light source S which may be of the halogen lamp or xenon lamp type (not shown in the figure).
  • a Halogen type lamp H11 This is an example of a Halogen type lamp H11.
  • the reflector R is of the complex surface type, defined so as to generate a flat-cut, anti-fog type beam. For more details on obtaining such a beam, it is advantageous to refer to the FRO Patents 2,793,000 and FR 2 792 999 .
  • the module M also includes a styling piece called mask B, which provides surface continuity between the outer edge of the reflector R and the edge of the ice closing the module (not shown), and which is substantially cylindrical to fit to the outer contour of the reflector.
  • the mask is aluminized and has streaks that have a twofold purpose: to give the module a particular style, and ensure that parasitic rays coming from the reflector and reaching the mask are diffused so as to avoid any unwanted glare by parasite reflection at its surface of light rays coming from the reflector or directly from the source.
  • the mask could also be chosen non-aluminized, and have a matte appearance, black or gray for example, making it also at least partially absorbent.
  • FIG. 2 represents the modified previous module according to the invention: the reflector R and the source S are unchanged, and the mask is modified so that it has two zones Z1, Z2 arranged laterally (considering the module as mounted in the vehicle), symmetrically with respect to the optical axis X defined by the main reflector R. These zones make it possible to obtain, in superposition with the anti-fog beam, a beam of "cornering" type.
  • Each of these zones is aluminized like the rest of the mask, but is not diffusing / absorbing: the geometry of the zone Z1 is calculated in such a way that any light beam coming either directly from the source S or coming from the reflector R, and reaching this zone starts again along a preferred axis X1 making an angle with the angle X of approximately 45 °, and which can be chosen between 30 and 60 ° in the most usual configurations.
  • optical axis X is inclined relative to the longitudinal axis AV of the vehicle.
  • the zone Z2 is calculated so that the rays that reach it are deflected and depart along a preferred axis X2 symmetrical to the axis X1 with respect to the optical axis X.
  • These surfaces Z1, Z2 comprise a succession of facets, each facet having its own focal length.
  • This type of module is undifferentiated right side and left side: only one of the zones is effective vis-à-vis the function "cornering" for each of the modules.
  • FIG. 8 makes it possible to visualize the preferred directions X1 and X2 of the secondary beams as well as their distribution.
  • Y1max corresponds to the direction of the ray of light having the highest angle relative to the optical axis X
  • Y1min corresponds to the direction of the ray of light having the lowest angle with respect to the optical axis X.
  • the secondary beam generated by the reflecting zone Z1 is therefore distributed between Y1 min and Y1 max and is emitted globally according to the preferred direction X1.
  • the preferred example shown in FIG. 8 corresponds to lighting with a "cornering" function.
  • the angle between Y1 min and X is about 30 ° and the angle between Y1 max and X is about 60 °.
  • the angle between the preferred direction X1 and the optical axis X is about 45 °.
  • the secondary beam generated by the reflective zone Z2 is emitted in the preferred direction X2, the angle between X2 and X being approximately 45 °, and is distributed between Y2min and Y2max, ie between approximately 30 ° and 60 ° to X.
  • Figures 3 and 4 compare the distribution of light beams obtained: these are representations of isolux, measured at 25 meters.
  • Figure 3 corresponds to Comparative Example 1: it has a distribution of an anti-fog beam with a flat cut, and a total measured flow of 370 lumen.
  • FIG. 4 corresponds to example 1 according to the invention: the central zone of illumination A corresponds to the zone illuminated by the main beam.
  • the left zone G and the right zone D correspond to the zones illuminated by the secondary beams generated by Z2 and Z1. It can be seen that the distribution of the beam has spread widely, in a relatively symmetrical manner on both sides of the original beam according to FIG. 3, and that the cut remains flat.
  • the total flux measured is 430 lumen.
  • the minimum values of the "cornering" defined according to the ECE R110 standard are easily reached, namely a 2.5D60L point at 240 candelas minimum, a 2.5D45L point of 400 candelas minimum and a point at 2.5D30L at 240 candelas minimum.
  • Spreading provides a cornering feature only on one side, the left side if we consider that this is a right anti-fog vehicle (symbolized by the arrow in Figure 4 ), the contribution right side (inside the vehicle so) participates in the fog beam. It is interesting to note that the measured total flux is significantly higher, and that the photometric characteristics of the anti-fog beam stricto sensu are not affected by the modification of the mask. It is concluded that the invention makes it possible to obtain a "cornering" function at a lower cost, without an additional lamp, and that obtaining this function in addition is not obtained to the detriment of the main function.
  • the luminous flux gain demonstrates that the "cornering" function results, at least in part, from the recovery of light rays that otherwise "get lost” in the mask. This significantly improves the efficiency of the lamp, all things being equal.
  • this is an optical module of the anti-fog type of a slightly different design from example 1: the source S is a halogen lamp H 11, the reflector R is of the surface type complex.
  • the mask B which is fixed on the periphery of the reflector is striated (alternatively, it can be grained). It also has an additional reflective zone Z1, which has a substantially parabolic shape, and whose surface is aluminized.
  • FIG. 6 shows the isolux lines of the module when the mask is devoid of the reflective zone Z1 (comparative example 2), and FIG. 7 the lines of the isolux according to example 2. It can be seen that the zone Z1 makes it possible to to obtain a beam which retains its flat cut and which spreads out on one side, namely a spreading in the zone G situated on the left of the central zone A.
  • the SAE J852 "cornering" measurement points have minimum required levels, largely achieved by Example 2, as shown in the measurement table below. Measuring points 2.5D60L 2.5D45L 2.5D30L Minimum required 300 cd 500 cd 300 cd Measured values 350 cd 770 cd 1400 cd

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The optical module (M) has a main reflector (R) associated with a light source for emitting a main light beam. A set of supplementary reflective zones (Z1, Z2) is disposed outside the main reflector and is adapted to receive some of the light coming directly or indirectly from the light source. The reflective zones are configured to reflect the light to create a secondary light beam in a mean direction such that the secondary mean direction is different from the mean direction of the main light beam. The reflective zones are disposed in a bezel (B) of the module.

Description

L'invention est relative à des dispositifs d'éclairage et/ou de signalisation pour automobile, et notamment à des projecteurs pour véhicule automobile.The invention relates to lighting and / or signaling devices for automobiles, and in particular to projectors for a motor vehicle.

Elle s'intéresse plus particulièrement aux faisceaux lumineux éclairant sur le côté des véhicules. On entend par là des faisceaux lumineux éclairant selon une orientation générale/moyenne oblique par rapport à l'axe longitudinal X du véhicule (axe généralement confondu avec ou peu différent de l'orientation de l'axe optique des autres faisceaux, dits principaux, émis par les projecteurs).She is particularly interested in light beams on the side of vehicles. By this is meant light beams illuminating in a general / oblique mean orientation with respect to the longitudinal axis X of the vehicle (axis generally coincident with or little different from the orientation of the optical axis of the other beams, so-called principal, emitted by the projectors).

Il peut s'agir, au sens de l'invention, et de façon non limitative, des faisceaux lumineux émis par des modules optiques pour assurer dans les virages un complément d'éclairage du côté où le véhicule tourne. Cette fonctionnalité est connue sous le terme de « code virage fixe », ou encore de FBL (l'abréviation anglo-saxonne de « Fixed Bending Light »). Elle est décrite par exemple dans le brevet EP 864 462 . Le faisceau du FBL s'associe ainsi à un faisceau standard de type code émis par un module optique dit principal, pour donner un faisceau global avec une ouverture angulaire plus importante, ledit faisceau global devant respecter une grille photométrique définie dans les réglementations en vigueur concernant les fonctions dites AFS (abréviation du terme anglo-saxon « Advanced Front Lighting Systems »).It may be, within the meaning of the invention, and in a non-limiting manner, light beams emitted by optical modules to ensure in turns additional lighting on the side where the vehicle rotates. This feature is known as "fixed turnaround", or FBL (the English abbreviation of "Fixed Bending Light"). It is described for example in the patent EP 864,462 . The beam of the FBL thus associates with a standard code-type beam emitted by a so-called main optical module, to give a global beam with a larger angular aperture, said overall beam having to respect a photometric grid defined in the current regulations concerning functions called AFS (abbreviation of the term "Advanced Front Lighting Systems").

Il peut également s'agir des faisceaux lumineux assurant une fonction d'éclairage connue sous le terme anglo-saxon de « cornering », soit un éclairage dans les coins, dont le but consiste à éclairer davantage sur les côtés du véhicule, pour permettre une meilleure visibilité au conducteur du véhicule (fonction d'éclairage), mais aussi pour permettre à l'environnement extérieur du véhicule de mieux discerner le véhicule (fonction de signalisation) Cette fonction est, à elle seule, définie par une grille photométrique spécifique prévue dans les réglementations en vigueur.It may also be light beams providing a lighting function known as Anglo-Saxon "cornering", or a lighting in the corners, the purpose of which is to illuminate further on the sides of the vehicle, to allow a better visibility to the driver of the vehicle (lighting function), but also to allow the vehicle's external environment to better discern the vehicle (signaling function) This function is, in itself, defined by a specific photometric grid provided for in the regulations in force.

Le point commun à ces deux types de faisceaux, « cornering » et faisceau complémentaire de FBL, est qu'il faut parvenir à envoyer suffisamment de lumière selon un axe oblique par rapport à l'axe longitudinal du véhicule, ce qui pose un certain nombre de problèmes, puisque habituellement les projecteurs comprennent un ou plusieurs modules optiques émettant des faisceaux lumineux dont l'axe optique coïncide peu ou prou avec l'axe X longitudinal du véhicule. (On comprend par «module optique» un ensemble de composants comportant au moins un réflecteur, sa ou ses sources lumineuses associée(s) et éventuellement des éléments optiques associés du type éléments dioptriques, lentille de Fresnel ...), et apte à émettre au moins un faisceau lumineux donné.The common point of these two types of beams, "cornering" and complementary beam of FBL, is that it must be possible to send enough light along an axis oblique to the longitudinal axis of the vehicle, which poses a number problems, since usually the projectors comprise one or more optical modules emitting light beams whose optical axis coincides more or less with the longitudinal axis X of the vehicle. (By "optical module" is meant a set of components comprising at least one reflector, its associated light source (s) and possibly associated optical elements of the dioptric element (Fresnel lens, etc.) type, and capable of emitting at least one given light beam.

Une première solution a consisté à tourner à l'intérieur du projecteur le module destiné à éclairer latéralement par rapport aux autres modules optiques : on conserve au projecteur sa configuration habituelle, avec ses modules principaux, par exemple celui émettant le faisceau code ou route, et on tourne le module complémentaire FBL ou « Cornering », de façon à ce que son axe optique fasse un angle avec l'axe optique des autres modules.A first solution consisted in turning inside the projector the module intended to illuminate laterally with respect to the other optical modules: the projector is kept in its usual configuration, with its main modules, for example the one emitting the beam code or road, and the FBL or Cornering add-on module is rotated so that its optical axis is at an angle to the optical axis of the other modules.

Cette solution a cependant ses limites : un module ainsi tourné est plus encombrant à l'intérieur du projecteur, avec notamment des connecteurs de lampe disposés de façon oblique, un réflecteur prenant plus de place. Or c'est la compacité que l'on recherche de plus en plus dans un projecteur. Par ailleurs, tourner ainsi le module tend à entraîner une perte de flux lumineux émis par le module : les rayons les plus obliques ont tendance à ne plus pouvoir sortir de la glace de fermeture du projecteur. Suivant donc la forme du projecteur, l'amplitude de la rotation du module est donc plus ou moins limitée, et il est difficile de garantir que le faisceau émis par le module et sortant effectivement du projecteur est bien compatible avec les réglementations en vigueur.However, this solution has its limitations: a turned module is more bulky inside the projector, including obliquely arranged lamp connectors, a reflector taking up more space. But it is the compactness that we are looking for more and more in a projector. In addition, thus turning the module tends to cause a loss of luminous flux emitted by the module: the more oblique rays tend to no longer be able to leave the closing mirror of the projector. Therefore, depending on the shape of the projector, the amplitude of the rotation of the module is therefore more or less limited, and it is difficult to guarantee that the beam emitted by the module and actually leaving the projector is compatible with the regulations in force.

L'invention a donc pour but de remédier aux inconvénients de cette première solution, en proposant notamment une nouvelle conception de module d'éclairage latéral, qui soit notamment plus facile à réaliser, plus performant, ou encore moins contraignant quant à la conception du module et/ou du projecteur incluant le module en question.The purpose of the invention is therefore to remedy the drawbacks of this first solution, notably by proposing a new lateral lighting module design, which is notably easier to produce, more efficient, or even less constraining as regards the design of the module. and / or the projector including the module in question.

Le module optique selon l'invention est destiné à équiper un dispositif d'éclairage et/ou de signalisation pour véhicule automobile. Il comprend au moins un réflecteur principal associé à au moins une source lumineuse afin d'émettre un faisceau lumineux principal. Il comporte aussi au moins une zone réfléchissante supplémentaire hors dudit réflecteur principal et qui est apte à recevoir une partie de la lumière provenant directement ou indirectement de ladite source lumineuse et à la renvoyer pour faire un faisceau lumineux secondaire dans une direction privilégiée différente de la direction privilégiée du faisceau lumineux principal.The optical module according to the invention is intended to equip a lighting and / or signaling device for a motor vehicle. It comprises at least one main reflector associated with at least one light source in order to emit a main light beam. It also comprises at least one additional reflecting zone outside said main reflector and which is adapted to receive a portion of the light coming directly or indirectly from said light source and to return it to make a secondary light beam in a preferred direction different from the direction privileged of the main light beam.

On utilise ainsi, en quelque sorte, une partie de la lumière destinée à faire un faisceau donné (le faisceau dit principal) pour faire un autre faisceau (dit secondaire) d'orientation différente, cette utilisation étant maîtrisée de façon à ne pas perturber les performances optiques, la photométrie et la distribution du faisceau principal. Ceci peut être réalisé, par exemple, en utilisant de la lumière dans la partie du faisceau principal la moins utile sur le plan photométrique, et/ou en récupérant de la lumière qui, sinon, aurait été perdue.In a way, some of the light intended to make a given beam (the so-called main beam) is thus used to make another beam (said to be secondary) of different orientation, this use being controlled so as not to disturb the optical performance, photometry and distribution of the main beam. This can be achieved, for example, by using light in the less photometrically useful part of the main beam, and / or by recovering light that otherwise would have been lost.

Cette solution présente de nombreux avantages, dont les suivants :

  • on n'a recours qu'à une seule source lumineuse pour faire deux faisceaux lumineux différents, on peut ainsi conserver des sources lumineuses standard sans nécessiter l'utilisation d'une seconde source spécifique (ni tous ses accessoires, sans faisceau électrique supplémentaire notamment),
  • on peut conserver au module optique son orientation habituelle selon l'axe longitudinal du véhicule, ce qui est intéressant en termes de compacité du produit,
  • le module peut conserver substantiellement standard la conception du réflecteur principal dédié à l'obtention d'un faisceau principal donné, en ajoutant la zone réfléchissante supplémentaire appropriée pour avoir le faisceau secondaire voulu,
  • on peut ainsi décliner plusieurs modules optiques présentant un faisceau principal substantiellement identique, avec le même réflecteur, et pouvant présenter plusieurs faisceaux secondaires possibles pour adapter le module à la demande, selon la configuration de zone réfléchissante supplémentaire, ce qui donne une flexibilité accrue au module,
  • on peut ainsi conférer une nouvelle fonction à un module optique existant sans remettre en cause entièrement sa conception optique et mécanique.
This solution has many advantages, including the following:
  • we use only one light source to make two different light beams, we can keep standard light sources without requiring the use of a second specific source (and all its accessories, especially without additional wiring harness),
  • we can keep the optical module its usual orientation along the longitudinal axis of the vehicle, which is interesting in terms of compactness of the product,
  • the module can retain substantially the design of the main reflector dedicated to obtaining a given main beam, by adding the additional reflective zone appropriate to have the desired secondary beam,
  • it is thus possible to decline several optical modules having a substantially identical main beam, with the same reflector, and having a plurality of possible secondary beams to adapt the module to the request, according to the additional reflective zone configuration, which gives the module greater flexibility. ,
  • it is thus possible to confer a new function on an existing optical module without completely calling into question its optical and mechanical design.

Le fait que la zone réfléchissante supplémentaire soit hors du réflecteur principal signifie qu'elle peut être attenante, à proximité du réflecteur, mais qu'elle n'en fait pas partie intégrante, ce qui permet, comme évoqué plus haut, de standardiser le réflecteur principal.The fact that the additional reflective zone is out of the main reflector means that it may be adjacent, close to the reflector, but that it is not an integral part thereof, which makes it possible, as mentioned above, to standardize the reflector. main.

Préférentiellement, la distance entre la zone réfléchissante supplémentaire et l'axe optique est supérieure ou égale à la distance entre les bords du réflecteur principal et l'axe optique. C'est-à-dire que pour chaque point de la zone réfléchissante supplémentaire, la distance la plus courte de ce point à l'axe optique est préférentiellement supérieure ou égale à la distance la plus courte entre les bords du réflecteur principal et l'axe optique.Preferably, the distance between the additional reflective zone and the optical axis is greater than or equal to the distance between the edges of the main reflector and the optical axis. That is, for each point of the additional reflective zone, the shortest distance from this point to the optical axis is preferably greater than or equal to the shortest distance between the edges of the main reflector and the optical axis.

Préférentiellement, la zone réfléchissante supplémentaire est apte à recevoir une partie de la lumière provenant seulement directement de ladite source lumineuse. Par « lumière directe de la source lumineuse » ou « provenant directement de la source lumineuse », on entend les rayons émis par la source lumineuse qui n'ont pas été préalablement réfléchis. Par opposition, par « lumière provenant indirectement de la source lumineuse », on entend les rayons qui ont été préalablement réfléchis au moins une fois après leur émission par la source lumineuse.Preferably, the additional reflective zone is able to receive a part of the light coming only directly from said light source. "Direct light from the light source" or "coming directly from the light source" means the rays emitted by the light source that have not been previously reflected. By contrast, "light indirectly from the light source" means the rays that have been previously reflected at least once after their emission by the light source.

On comprend sous le terme de module optique un ensemble de composants comprenant au moins un réflecteur et une source lumineuse, et qui peut soit être un élément d'éclairage unitaire, comme un module anti-brouillard indépendant du projecteur du véhicule, soit être un composant destiné à être intégré dans un projecteur.An optical module is understood to mean a set of components comprising at least one reflector and a light source, and which may be a unit lighting element, such as an anti-fog module independent of the vehicle headlamp, or may be a component intended to be integrated into a projector.

La direction privilégiée du faisceau lumineux principal peut être assimilée à son axe optique. Cet axe peut être confondu ou non avec l'axe longitudinal du véhicule équipé du dispositif selon l'invention : II peut être effectivement être confondu, ou, par exemple, être un peu incliné dans un plan substantiellement vertical et/ou horizontal par rapport à l'axe longitudinal du véhicule. Par exemple, quand le faisceau principal est de type anti-brouillard, son axe optique peut être légèrement incliné, de 0.5 à 2° verticalement, et de 0 à 15°, notamment de 5 à 10°, horizontalement.The preferred direction of the main light beam can be likened to its optical axis. This axis can be confused or not with the longitudinal axis of the vehicle equipped with the device according to the invention: It can be effectively confused, or, for example, be a little inclined in a substantially vertical plane and / or horizontal with respect to the longitudinal axis of the vehicle. For example, when the main beam is anti-fog type, its optical axis can be slightly inclined, 0.5 to 2 ° vertically, and 0 to 15 °, including 5 to 10 °, horizontally.

On a mentionné plus haut une direction privilégiée « différente » de la direction privilégiée du faisceau lumineux principal. Cette différence angulaire entre les deux faisceaux, le principal et le dévié, est de préférence significative, de préférence d'au moins 10°, notamment comprise entre 25° et 70°, notamment entre 30 et 60°. Cet écart se fait, de préférence, selon un plan substantiellement horizontal, bien que l'invention comprenne aussi une différence d'orientation ayant à la fois une composante dans un plan horizontal et une composante dans un plan vertical.A preferred direction "different" from the preferred direction of the main light beam has been mentioned above. This angular difference between the two beams, the main and the deviated, is preferably significant, preferably at least 10 °, especially between 25 ° and 70 °, especially between 30 and 60 °. This gap is preferably in a substantially horizontal plane, although the invention also includes a difference in orientation having both a component in a horizontal plane and a component in a vertical plane.

Le faisceau secondaire présente préférentiellement une répartition de 0 à 90°. Par « répartition », on entend l'angle entre le rayon du faisceau secondaire présentant la différence angulaire la plus faible avec l'axe optique du module optique et le rayon du faisceau secondaire présentant la différence angulaire la plus grande avec l'axe optique du module optique.The secondary beam preferably has a distribution of 0 to 90 °. "Distribution" means the angle between the radius of the secondary beam having the smallest angular difference with the optical axis of the optical module and the radius of the secondary beam having the greatest angular difference with the optical axis of the optical module.

Préférentiellement, la zone réfléchissante supplémentaire permet de réfléchir sur le côté 5 à 10 % du flux lumineux provenant directement de la source lumineuse.Preferably, the additional reflective zone makes it possible to reflect on the 5 to 10% side of the luminous flux coming directly from the light source.

Préférentiellement, le faisceau secondaire est suffisant pour générer un éclairage, de sorte qu'il n'est pas nécessaire d'utiliser une lentille convergente ou d'autres moyens optiques permettant de changer la direction ou la distribution des rayons réfléchis par la zone réfléchissante supplémentaire. Plus particulièrement, la présente invention peut être adaptée à des projecteurs dont le module optique, composé d'une lampe et d'un réflecteur, est dépourvu de lentille.Preferably, the secondary beam is sufficient to generate illumination, so that it is not necessary to use a converging lens or other optical means to change the direction or distribution of the rays reflected by the additional reflective zone . More particularly, the present invention can be adapted to projectors whose optical module, composed of a lamp and a reflector, is devoid of a lens.

Selon un mode de réalisation de l'invention, le faisceau lumineux principal est un faisceau sans coupure, du type faisceau de route, ou un faisceau à coupure, notamment à coupure oblique, comme un faisceau code, ou à coupure plate, comme un faisceau anti-brouillard.According to one embodiment of the invention, the main light beam is an unbroken beam, of the road beam type, or a cut-off beam, particularly an oblique cut-off beam, such as a coded beam, or a flat-cut beam beam beam. anti-fog.

Selon un autre mode de réalisation, éventuellement cumulatif avec le précédent, le faisceau lumineux secondaire est un faisceau à coupure, notamment un faisceau complémentaire d'une fonction de code virage fixe ou un faisceau assurant une fonction d'éclairage latéral dite « cornering ».According to another embodiment, possibly cumulative with the preceding, the secondary light beam is a cut-off beam, in particular a complementary beam of a fixed turn code function or a beam providing a lateral lighting function called "cornering".

Selon un mode préférentiel de réalisation, la zone réfléchissante supplémentaire est disposée de manière à ce que ledit faisceau lumineux secondaire éclaire une zone d'éclairage supplémentaire, s'étendant de façon suffisamment large hors de la zone éclairée par ledit faisceau lumineux principal pour permettre un éclairage sur les côtés et assurer ainsi une fonction d'éclairage latéral du type « cornering ».According to a preferred embodiment, the additional reflecting zone is arranged so that said secondary light beam illuminates an additional lighting zone, extending sufficiently broadly out of the area illuminated by said main light beam to allow a lighting on the sides and thus ensure a lateral lighting function of the "cornering" type.

Lorsque l'on veut obtenir un éclairage sur les côtés, la différence angulaire entre les directions privilégiées des deux faisceaux est préférentiellement d'environ 45°, et la répartition du faisceau secondaire est préférentiellement de 30 à 60°.When one wants to obtain lighting on the sides, the angular difference between the preferred directions of the two beams is preferably about 45 °, and the distribution of the secondary beam is preferably 30 to 60 °.

Avantageusement mais non nécessairement, les faisceaux principal d'une part et secondaire d'autre part sont des faisceaux à coupure, avec notamment le même type de coupure, plate ou oblique.Advantageously but not necessarily, the main beam on the one hand and the secondary beam on the other hand are cut-off beams, with in particular the same type of cutoff, flat or oblique.

Selon une première variante, le module optique ne comprend qu'une seule zone réfléchissante supplémentaire. On a ainsi un module pour équiper l'avant droit du véhicule avec une zone réfléchissante supplémentaire donnée, et un module pour équiper l'avant gauche du véhicule, avec une zone réfléchissante différente dans son positionnement dans le module que dans le module côté droit.According to a first variant, the optical module comprises only one additional reflecting zone. There is thus a module for equipping the right front of the vehicle with a given additional reflective zone, and a module for equipping the left front of the vehicle, with a different reflecting zone in its positioning in the module than in the right-hand module.

Selon une seconde variante, le module optique comprend au moins deux zones réfléchissantes supplémentaires, notamment deux zones disposées symétriquement par rapport au réflecteur principal. Cette variante offre l'avantage d'avoir des modules pouvant s'adapter indifféremment aux côtés droit et gauche du véhicule, ce qui simplifie la production et le stockage des modules : On a un même élément optique, que le module soit destiné à équiper un projecteur droit ou un projecteur gauche automobile, que le module est destiné à s'intégrer dans un projecteur ou soit une unité indépendante.According to a second variant, the optical module comprises at least two additional reflecting zones, in particular two zones disposed symmetrically with respect to the main reflector. This variant offers the advantage of having modules that can adapt indifferently to the right and left sides of the vehicle, which simplifies the production and storage of modules: It has the same optical element, that the module is intended to equip a right projector or a left automotive projector, that the module is intended to integrate into a projector or is an independent unit.

Avantageusement, la (les) zone(s) réfléchissante(s) supplémentaire(s) est(sont) intégré(s) à une pièce de style du module. On comprend par pièce de style tout composant qui vient habiller les modules optiques et, par exemple, assurer une continuité de surface entre les modules et les parois du boîtier ou la zone de jonction boîtier/glace de fermeture.Advantageously, the additional reflective zone (s) is (are) integrated (s) to a piece of style of the module. By style piece is understood any component that comes to dress the optical modules and, for example, ensure a surface continuity between the modules and the walls of the housing or the junction box housing / closing ice.

Ces pièces de style ont donc une vocation cosmétique, et on cherche généralement à ce qu'elles n'aient aucune, ou le moins possible, d'incidence, sur le plan optique, sur les faisceaux lumineux émis par le module. Elles peuvent faire partie intégrante du module, notamment quand le module est un produit unitaire, comme un module anti-brouillard par exemple. Elles peuvent également être associées, en contact avec les modules, et faire partie du projecteur dans lequel le module doit être intégré.These style pieces have a cosmetic vocation, and it is generally sought that they have no, or as little as possible, impact, optically, on the light beams emitted by the module. They can be an integral part of the module, especially when the module is a unitary product, such as an anti-fog module for example. They can also be associated, in contact with the modules, and be part of the projector in which the module must be integrated.

On modifie ainsi localement une pièce de style pour qu'elle puisse, contrairement à sa vocation, participer à la définition optique d'un faisceau lumineux.One thus modifies locally a piece of style so that it can, contrary to its vocation, participate in the optical definition of a light beam.

L'intégration de la ou des zones réfléchissantes supplémentaires dans une pièce de style peut se faire de différentes façons : il peut s'agir, par exemple, de modifier superficiellement localement la pièce de style. Il peut aussi s'agir d'insérer la zone réfléchissante dans une pièce de style, sous forme d'un insert que l'on vient fixer à la pièce par tout moyen mécanique (clipsage ....) ou par collage.The integration of the additional reflective zone (s) in a style piece can be done in different ways: it may be, for example, to superficially modify the piece of style locally. It may also be to insert the reflective area in a piece of style, in the form of an insert that is just fixed to the room by any mechanical means (clipping ....) or by gluing.

La (les) zone(s) réfléchissante(s) supplémentaire est(sont) par exemple disposée(s) dans le masque du module entourant au moins en partie le réflecteur principal ou fait(font) partie intégrante dudit masque ou est(sont) disposée(s) à proximité dudit masque. Le terme masque (« bezel » en anglais) désigne la pièce de style assurant une continuité de surface entre le réflecteur et le reste du module (ou du projecteur).The additional reflective zone (s) is (are) for example disposed in the mask of the module at least partly surrounding the main reflector or is (are) integral with said mask or is (are) arranged (s) near said mask. The term mask ("bezel" in English) designates the style piece ensuring a surface continuity between the reflector and the rest of the module (or projector).

Le masque est de préférence substantiellement réfléchissant localement pour obtenir la ou les zones supplémentaires réfléchissantes voulues, et substantiellement diffusant/ absorbant sur le reste de sa surface visible. Le masque peut être rendu diffusant par grainage, les zones réfléchissantes supplémentaires étant aluminées mais non grainées.The mask is preferably substantially locally reflective to obtain the desired additional reflective area (s), and substantially diffusing / absorbing over the remainder of its visible surface. The mask can be made diffusing by graining, the additional reflective zones being aluminized but not grained.

Concrètement, on peut faire un masque entièrement aluminé, donc initialement entièrement réfléchissant, puis traiter les parties visibles du masque afin de les rendre diffusantes/absorbantes sauf dans les zones qui doivent réfléchir selon l'invention. On peut aussi avoir la démarche inverse, en ayant un masque dont la surface visible est initialement entièrement rendue diffusante ou absorbante, puis rendre localement certaines zones réfléchissantes (par aluminage sélectif par exemple). On peut aussi, comme évoqué plus haut, prévoir une « fenêtre » dans le masque dans laquelle on fixe un insert réfléchissant, ou une zone que l'on vient recouvrir d'un insert réfléchissant.Concretely, one can make a fully aluminized mask, so initially entirely reflective, then treat the visible parts of the mask to make them diffusing / absorbing except in areas that must reflect according to the invention. We can also have the opposite approach, by having a mask whose visible surface is initially made entirely diffusing or absorbing, then make local some reflective zones (by selective aluminizing for example). It is also possible, as mentioned above, to provide a "window" in the mask in which a reflective insert is attached, or an area that is covered by a reflective insert.

Notamment quand il est nécessaire de contrôler parfaitement les caractéristiques du faisceau secondaire, il est utile non seulement de rendre réfléchissante une zone de la pièce de style ou du masque, mais également de modifier le relief de la pièce dans ladite zone : la zone a de préférence une forme géométrique étudiée de façon à respecter la photométrie demandée. Afin d'assurer une continuité de surface avec le reste de la pièce de style, on peut alors considérer que la zone supplémentaire réfléchissante comporte une portion centrale définie optiquement comme un réflecteur, et une portion périphérique qui est une zone de jonction avec le reste de la pièce. La zone, au moins dans cette portion centrale, peut ainsi comporter une pluralité de facettes, ayant notamment une pluralité de focales. Cette modification de géométrie dans la pièce de style, outre la modification d'aspect, peut aussi participer à un effet de style intéressant.Especially when it is necessary to perfectly control the characteristics of the secondary beam, it is useful not only to make reflective an area of the style room or mask, but also to change the relief of the room in said area: the area has preferably a geometrical shape studied so as to respect the photometry required. In order to ensure surface continuity with the rest of the styling piece, it can then be considered that the supplementary reflective zone comprises a central portion optically defined as a reflector, and a peripheral portion which is a junction zone with the rest of the the room. The zone, at least in this central portion, may thus comprise a plurality of facets, having in particular a plurality of focal lengths. This geometry change in the style piece, in addition to the appearance change, can also contribute to an interesting style effect.

Le réflecteur principal est par exemple de type à surface complexe, ou de type à génératrices paraboliques, ou de type elliptique.The main reflector is for example of complex surface type, or of type with parabolic generators, or of elliptical type.

L'invention a également pour objet le projecteur équipé d'au moins un de ces modules optiques, et la voiture équipée de l'un de ces modules, seuls ou intégrés dans un projecteur.The invention also relates to the projector equipped with at least one of these optical modules, and the car equipped with one of these modules, alone or integrated into a projector.

L'invention sera décrite ci-après à l'aide d'exemples non limitatifs illustrés par les figures suivantes :

  • Fig.1a et 1b : une vue de face et en perspective éclatée d'un module optique anti-brouillard selon l'art antérieur (exemple comparatif 1),
  • Fig. 2a, 2b, 2c, et 2d : une vue de face ,en perspective éclatée, de dessus et latérale d'un module optique anti-brouillard modifié selon l'invention pour faire également un faisceau « cornering » (exemple 1),
  • Fig.3 : une représentation des isolux du faisceau anti-brouillard avec le module de l'exemple comparatif,
  • Fig.4 : une représentation des isolux du faisceau anti-brouillard et « cornering » avec le module de l'exemple 1,
  • Fig. 5a et 5b : une vue en perspective éclatée d'un autre module optique anti-brouillard modifié selon l'invention pour faire également un faisceau « cornering » (exemple 2),
  • Fig.6 : une représentation des isolux du faisceau anti-brouillard avec le module de l'exemple 2 avant modification selon l'invention (exemple comparatif 2),
  • Fig.7 : une représentation des isolux du faisceau anti-brouillard et « cornering » avec le module de l'exemple 2,
  • Fig.8 : une représentation schématique d'un module optique anti-brouillard modifié selon l'invention et de la trajectoire de rayons constituant le faisceau « cornering », selon une section horizontale, passant par l'axe optique du module.
The invention will be described hereinafter with the aid of non-limiting examples illustrated by the following figures:
  • FIGS. 1a and 1b: a front and exploded perspective view of an optical anti-fog module according to the prior art (comparative example 1),
  • Fig. 2a, 2b, 2c, and 2d: a front view, in exploded perspective, of top and side of a modified anti-fog optical module according to the invention to also make a beam "cornering" (Example 1),
  • FIG. 3: a representation of the isolux of the anti-fog beam with the module of the comparative example,
  • FIG. 4: a representation of the isolux of the anti-fog and cornering beam with the module of example 1,
  • Fig. 5a and 5b: an exploded perspective view of another modified anti-fog optical module according to the invention to also make a "cornering" beam (example 2),
  • FIG. 6: a representation of the isolux of the anti-fog beam with the module of example 2 before modification according to the invention (comparative example 2),
  • FIG. 7: a representation of the isolux of the anti-fog and cornering beam with the module of example 2,
  • FIG. 8: a schematic representation of a modified anti-fog optical module according to the invention and of the ray trajectory constituting the "cornering" beam, in a horizontal section, passing through the optical axis of the module.

Toutes ces figures sont schématiques et ne respectent pas nécessairement l'échelle. Tous les composants ne sont pas représentés, mais seulement ceux qui concernent directement l'invention, pour en faciliter la lecture.All these figures are schematic and do not necessarily respect the scale. All the components are not represented, but only those which directly concern the invention, to facilitate reading.

Exemple 1 comparatif (art antérieur) Comparative Example 1 (prior art)

La figure 1 représente en perspective un module optique M comprenant un réflecteur R et une source lumineuse S qui peut être du type lampe halogène ou lampe xénon (non représentée à la figure). Il s'agit ici, à titre d'exemple d'une lampe de type halogène H11. Le réflecteur R est de type surface complexe, défini de façon à générer un faisceau à coupure plate, de type anti-brouillard. Pour plus de détails sur l'obtention d'un tel faisceau, on peut avantageusement se reporter aux brevets FRO 2 793 000 et FR 2 792 999 .FIG. 1 represents in perspective an optical module M comprising a reflector R and a light source S which may be of the halogen lamp or xenon lamp type (not shown in the figure). This is an example of a Halogen type lamp H11. The reflector R is of the complex surface type, defined so as to generate a flat-cut, anti-fog type beam. For more details on obtaining such a beam, it is advantageous to refer to the FRO Patents 2,793,000 and FR 2 792 999 .

Le module M comporte aussi une pièce de style appelée masque B, qui vient assurer la continuité de surface entre le bord extérieur du réflecteur R et le bord de la glace fermant le module (non représentée), et qui est substantiellement cylindrique pour s'adapter au contour extérieur du réflecteur. Le masque est aluminé et présente des stries s qui ont un double objectif : conférer au module un style particulier, et s'assurer que des rayons parasites provenant du réflecteur et atteignant le masque soient diffusés de façon à éviter tout éblouissement intempestif par réflexion parasite à sa surface de rayons lumineux provenant du réflecteur ou directement de la source. Le masque pourrait aussi être choisi non aluminé, et avoir un aspect mat, noir ou gris par exemple, le rendant également au moins partiellement absorbant.The module M also includes a styling piece called mask B, which provides surface continuity between the outer edge of the reflector R and the edge of the ice closing the module (not shown), and which is substantially cylindrical to fit to the outer contour of the reflector. The mask is aluminized and has streaks that have a twofold purpose: to give the module a particular style, and ensure that parasitic rays coming from the reflector and reaching the mask are diffused so as to avoid any unwanted glare by parasite reflection at its surface of light rays coming from the reflector or directly from the source. The mask could also be chosen non-aluminized, and have a matte appearance, black or gray for example, making it also at least partially absorbent.

Exemple 1 (selon l'invention) Example 1 (according to the invention)

La figure 2 représente le module précédent modifié selon l'invention : on conserve le réflecteur R et la source S inchangés, et on modifie le masque de façon à ce qu'il ait deux zones Z1,Z2 disposées latéralement (en considérant le module tel que monté dans le véhicule), symétriquement par rapport à l'axe optique X défini par le réflecteur principal R. Ces zones permettent d'obtenir, en superposition avec le faisceau anti-brouillard un faisceau de type « cornering ». Chacune de ces zones est aluminée comme le reste du masque, mais n'est pas diffusante/absorbante : la géométrie de la zone Z1 est calculée de façon à ce que tout rayon lumineux provenant soit directement de la source S soit provenant du réflecteur R, et atteignant cette zone en reparte selon un axe privilégié X1 faisant un angle avec l'angle X d'environ 45°, et qui peut être choisi entre 30 et 60° dans les configurations les plus usuelles.FIG. 2 represents the modified previous module according to the invention: the reflector R and the source S are unchanged, and the mask is modified so that it has two zones Z1, Z2 arranged laterally (considering the module as mounted in the vehicle), symmetrically with respect to the optical axis X defined by the main reflector R. These zones make it possible to obtain, in superposition with the anti-fog beam, a beam of "cornering" type. Each of these zones is aluminized like the rest of the mask, but is not diffusing / absorbing: the geometry of the zone Z1 is calculated in such a way that any light beam coming either directly from the source S or coming from the reflector R, and reaching this zone starts again along a preferred axis X1 making an angle with the angle X of approximately 45 °, and which can be chosen between 30 and 60 ° in the most usual configurations.

A noter également que l'axe optique X est incliné par rapport à l'axe longitudinal AV du véhicule.Also note that the optical axis X is inclined relative to the longitudinal axis AV of the vehicle.

De même, la zone Z2 est calculée de façon à ce que les rayons qui l'atteignent soient déviés et repartent selon un axe privilégié X2 symétrique de l'axe X1 par rapport à l'axe optique X. Ces surfaces Z1,Z2 comportent une succession de facettes, chaque facette ayant sa focale propre. Ce type de module est indifférencié côté droit et côté gauche : seule une des zones est efficace vis-à-vis de la fonction « cornering » pour chacun des modules.Similarly, the zone Z2 is calculated so that the rays that reach it are deflected and depart along a preferred axis X2 symmetrical to the axis X1 with respect to the optical axis X. These surfaces Z1, Z2 comprise a succession of facets, each facet having its own focal length. This type of module is undifferentiated right side and left side: only one of the zones is effective vis-à-vis the function "cornering" for each of the modules.

La figure 8 permet de visualiser les directions privilégiées X1 et X2 des faisceaux secondaires ainsi que leur répartition. Ainsi, Y1max correspond à la direction du rayon de lumière ayant l'angle le plus élevé rapport à l'axe optique X et Y1min correspond à la direction du rayon de lumière ayant l'angle le moins élevé par rapport à l'axe optique X. Le faisceau secondaire généré par la zone réfléchissante Z1 est donc réparti entre Y1 min et Y1 max et est émis globalement selon la direction privilégiée X1. L'exemple préférentiel représenté en figure 8, correspond à un éclairage avec une fonction « cornering ». L'angle entre Y1 min et X est d'environ 30° et l'angle entre Y1 max et X est d'environ 60°. L'angle entre la direction privilégiée X1 et l'axe optique X est d'environ 45°. Pareillement, on observe que le faisceau secondaire généré par la zone réfléchissante Z2 est émis selon la direction privilégiée X2, l'angle entre X2 et X étant d'environ 45°, et est réparti entre Y2min et Y2max, soit entre environ 30° et 60° par rapport à X.FIG. 8 makes it possible to visualize the preferred directions X1 and X2 of the secondary beams as well as their distribution. Thus, Y1max corresponds to the direction of the ray of light having the highest angle relative to the optical axis X and Y1min corresponds to the direction of the ray of light having the lowest angle with respect to the optical axis X. The secondary beam generated by the reflecting zone Z1 is therefore distributed between Y1 min and Y1 max and is emitted globally according to the preferred direction X1. The preferred example shown in FIG. 8 corresponds to lighting with a "cornering" function. The angle between Y1 min and X is about 30 ° and the angle between Y1 max and X is about 60 °. The angle between the preferred direction X1 and the optical axis X is about 45 °. Similarly, it is observed that the secondary beam generated by the reflective zone Z2 is emitted in the preferred direction X2, the angle between X2 and X being approximately 45 °, and is distributed between Y2min and Y2max, ie between approximately 30 ° and 60 ° to X.

Les figures 3 et 4 permettent de comparer la répartition des faisceaux lumineux obtenus : ce sont des représentations d'isolux, mesurés à 25 mètres.Figures 3 and 4 compare the distribution of light beams obtained: these are representations of isolux, measured at 25 meters.

La figure 3 correspond à l'exemple 1 comparatif : on a bien une répartition d'un faisceau d'anti-brouillard avec une coupure plate, et un flux total mesuré de 370 lumen.Figure 3 corresponds to Comparative Example 1: it has a distribution of an anti-fog beam with a flat cut, and a total measured flow of 370 lumen.

La figure 4 correspond à l'exemple 1 selon l'invention : la zone centrale d'éclairement A correspond à la zone éclairée par le faisceau principal. La zone gauche G et la zone droite D correspondent aux zones éclairées par les faisceaux secondaires générés par Z2 et Z1. On voit que la répartition du faisceau s'est largement étalée, de façon relativement symétrique de part et d'autre du faisceau d'origine selon la figure 3, et que la coupure reste plate. Le flux total mesuré est de 430 lumen.FIG. 4 corresponds to example 1 according to the invention: the central zone of illumination A corresponds to the zone illuminated by the main beam. The left zone G and the right zone D correspond to the zones illuminated by the secondary beams generated by Z2 and Z1. It can be seen that the distribution of the beam has spread widely, in a relatively symmetrical manner on both sides of the original beam according to FIG. 3, and that the cut remains flat. The total flux measured is 430 lumen.

On atteint facilement les valeurs minimales du « cornering » définies selon la norme ECE R110, à savoir un point 2.5D60L à 240 candelas minimum, un point 2.5D45L de 400 candelas minimum et un point à 2.5D30L à 240 candelas minimum. L'étalement n'apporte une fonctionnalité « cornering » que d'un côté, le côté gauche si l'on considère qu'il s'agit ici d'un anti-brouillard droit de véhicule (symbolisé par la flèche à la figure 4), l'apport côté droit (côté intérieur au véhicule donc) participe au faisceau anti-brouillard. Il est intéressant de noter que le flux total mesuré est plus élevé, et ceci de façon significative, et que les caractéristiques photométriques du faisceau anti-brouillard stricto sensu ne sont pas affectées par la modification du masque. On en conclut que l'invention permet d'obtenir une fonction « cornering » à moindre coût, sans lampe supplémentaire, et que l'obtention de cette fonction en plus ne s'obtient pas au détriment de la fonction principale.The minimum values of the "cornering" defined according to the ECE R110 standard are easily reached, namely a 2.5D60L point at 240 candelas minimum, a 2.5D45L point of 400 candelas minimum and a point at 2.5D30L at 240 candelas minimum. Spreading provides a cornering feature only on one side, the left side if we consider that this is a right anti-fog vehicle (symbolized by the arrow in Figure 4 ), the contribution right side (inside the vehicle so) participates in the fog beam. It is interesting to note that the measured total flux is significantly higher, and that the photometric characteristics of the anti-fog beam stricto sensu are not affected by the modification of the mask. It is concluded that the invention makes it possible to obtain a "cornering" function at a lower cost, without an additional lamp, and that obtaining this function in addition is not obtained to the detriment of the main function.

Le gain en flux lumineux démontre que la fonction « cornering » résulte, au moins pour partie, de la récupération de rayons lumineux qui, sinon, se « perdaient » au niveau du masque. On améliore ainsi sensiblement le rendement de la lampe, toutes choses égales par ailleurs.The luminous flux gain demonstrates that the "cornering" function results, at least in part, from the recovery of light rays that otherwise "get lost" in the mask. This significantly improves the efficiency of the lamp, all things being equal.

Exemple 2 (selon l'invention) Example 2 (according to the invention)

Comme représenté à la figure 5, Il s'agit ici d'un module optique de type anti-brouillard de conception un peu différente de l'exemple 1 : la source S est une lampe halogène H 11, le réflecteur R est de type surface complexe. Le masque B qui vient se fixer sur le pourtour du réflecteur est striée (alternativement, il peut être grainé). Il présente aussi une zone réfléchissante supplémentaire Z1, qui a une forme substantiellement parabolique, et dont la surface est aluminée. La figure 6 représente les lignes d'isolux du module quand le masque est dépourvu de la zone réfléchissante Z1 (exemple comparatif 2), et la figure 7 les lignes d'isolux selon l'exemple 2. On voit que la zone Z1 permet d'obtenir un faisceau qui conserve sa coupure plate et qui « s'étale » d'un côté, à savoir un étalement dans la zone G située à gauche de la zone centrale A.As shown in FIG. 5, this is an optical module of the anti-fog type of a slightly different design from example 1: the source S is a halogen lamp H 11, the reflector R is of the surface type complex. The mask B which is fixed on the periphery of the reflector is striated (alternatively, it can be grained). It also has an additional reflective zone Z1, which has a substantially parabolic shape, and whose surface is aluminized. FIG. 6 shows the isolux lines of the module when the mask is devoid of the reflective zone Z1 (comparative example 2), and FIG. 7 the lines of the isolux according to example 2. It can be seen that the zone Z1 makes it possible to to obtain a beam which retains its flat cut and which spreads out on one side, namely a spreading in the zone G situated on the left of the central zone A.

Les points de mesure du « cornering » selon la norme SAE J852 ont des niveaux minima requis, largement atteints par l'exemple 2, comme montré dans le tableau de mesures ci-dessous Points de mesure 2.5D60L 2.5D45L 2.5D30L Minimum requis 300 cd 500 cd 300 cd Valeurs mesurées 350 cd 770 cd 1400 cd The SAE J852 "cornering" measurement points have minimum required levels, largely achieved by Example 2, as shown in the measurement table below. Measuring points 2.5D60L 2.5D45L 2.5D30L Minimum required 300 cd 500 cd 300 cd Measured values 350 cd 770 cd 1400 cd

Claims (13)

Module optique (M) destiné à équiper un dispositif d'éclairage et/ou de signalisation pour véhicule automobile, ledit module optique comprenant au moins un réflecteur principal (R) associé à au moins une source lumineuse (S) afin d'émettre un faisceau lumineux principal, caractérisé en ce que ledit module optique (M) comporte au moins une zone réfléchissante supplémentaire (Z1,Z2) hors dudit réflecteur principal (R) et apte à recevoir une partie de la lumière provenant directement ou indirectement de ladite source lumineuse (S) et à la renvoyer pour faire un faisceau lumineux secondaire dans une direction (X1) privilégiée différente de la direction privilégiée (X) du faisceau lumineux principal.Optical module (M) intended to equip a lighting and / or signaling device for a motor vehicle, said optical module comprising at least one main reflector (R) associated with at least one light source (S) in order to emit a beam main light, characterized in that said optical module (M) comprises at least one additional reflecting zone (Z1, Z2) outside said main reflector (R) and able to receive a part of the light coming directly or indirectly from said light source ( S) and returning it to make a secondary light beam in a preferred direction (X1) different from the preferred direction (X) of the main light beam. Module selon l'une des revendications précédentes, caractérisé en ce que la (les) zone(s) réfléchissante(s) supplémentaire(s) (Z1,Z2) est(sont) intégré(s) à une pièce de style (B) du module.Module according to one of the preceding claims, characterized in that the additional reflective zone (s) (Z1, Z2) is (are) integrated with a piece of style (B). of the module. Module selon l'une des revendications précédentes, caractérisé en ce que la (les) zone(s) réfléchissante(s) supplémentaire(s) (Z1, Z2) est (sont) disposée(s) de manière à ce que ledit faisceau lumineux secondaire éclaire une zone d'éclairage supplémentaire, s'étendant de façon suffisamment large hors de la zone éclairée par ledit faisceau lumineux principal pour permettre un éclairage sur les côtés du type « cornering ».Module according to one of the preceding claims, characterized in that the additional reflective zone (s) (Z1, Z2) is (are) arranged in such a way that said light beam secondary illuminates an additional lighting zone, extending sufficiently wide outside the area illuminated by said main light beam to allow illumination on the sides of the type "cornering". Module selon l'une des revendications précédentes, caractérisé en ce que la (les) zone(s) réfléchissante(s) supplémentaire(s) (Z1,Z2) est(sont) disposée(s) dans le masque (B) du module entourant au moins en partie le réflecteur principal (R) ou fait(font) partie intégrante dudit masque (B) ou est(sont) disposée(s) à proximité dudit masque (B).Module according to one of the preceding claims, characterized in that the additional reflective zone (s) (Z1, Z2) is (are) arranged in the mask (B) of the module at least partially surrounding the main reflector (R) or is (are) integral with said mask (B) or is (are) disposed near said mask (B). Module selon la revendication 4, caractérisé en ce que le masque (B) est substantiellement réfléchissant localement pour obtenir la ou les zones supplémentaires réfléchissantes voulues (Z1,Z2), et substantiellement diffusant et/ou absorbant sur le reste de sa surface visible.Module according to claim 4, characterized in that the mask (B) is substantially locally reflective to obtain the desired additional reflective zone or zones (Z1, Z2), and substantially diffusing and / or absorbing over the remainder of its visible surface. Module selon l'une des revendications précédentes, caractérisé en ce que le faisceau lumineux principal est un faisceau sans coupure, ou un faisceau à coupure, notamment à coupure oblique ou à coupure plate, comme un faisceau code ou anti-brouillard.Module according to one of the preceding claims, characterized in that the main light beam is an unbroken beam, or a cut-off beam, particularly oblique cut or flat cut, such as a code or fog light beam. Module selon l'une des revendications précédentes, caractérisé en ce que le faisceau lumineux secondaire est un faisceau à coupure, notamment un faisceau complémentaire d'une fonction de code virage fixe ou un faisceau assurant une fonction d'éclairage latéral dite « cornering ».Module according to one of the preceding claims, characterized in that the secondary light beam is a cut-off beam, in particular a complementary beam of a fixed turn code function or a beam providing a lateral lighting function called "cornering". Module selon l'une des revendications précédentes, caractérisé en ce qu'il comprend au moins deux zones réfléchissantes supplémentaires (Z1,Z2), notamment deux zones disposées symétriquement par rapport au réflecteur principal (R).Module according to one of the preceding claims, characterized in that it comprises at least two additional reflecting zones (Z1, Z2), in particular two zones arranged symmetrically with respect to the main reflector (R). Module selon l'une des revendications précédentes, caractérisé en ce que la (les) zone(s) réfléchissante(s) supplémentaire(s) (Z1, Z2) est(sont) apte(s) à recevoir une partie de la lumière provenant seulement directement de ladite source lumineuse (S).Module according to one of the preceding claims, characterized in that the additional reflective zone (s) (Z1, Z2) is (are) capable of receiving a part of the light coming from only directly from said light source (S). Module selon l'une des revendications précédentes, caractérisé en ce que la distance entre la (les) zone(s) réfléchissante(s) supplémentaire (Z1, Z2) et l'axe optique (X) est supérieure ou égale à la distance entre les bords du réflecteur principal (R) et l'axe optique.Module according to one of the preceding claims, characterized in that the distance between the additional reflective zone (s) (Z1, Z2) and the optical axis (X) is greater than or equal to the distance between the edges of the main reflector (R) and the optical axis. Module selon l'une des revendications précédentes, caractérisé en ce que la ou les zones(s) réfléchissante(s) supplémentaire(s) (Z1, Z2) comporte(nt) une pluralité de facettes, ayant notamment une pluralité de focales.Module according to one of the preceding claims, characterized in that the additional reflective zone (s) (Z1, Z2) comprises (nt) a plurality of facets, in particular having a plurality of focal lengths. Module selon l'une des revendications précédentes, caractérisé en ce que le réflecteur principal (R) est de type à surface complexe, ou de type à génératrices paraboliques, ou de type elliptique.Module according to one of the preceding claims, characterized in that the main reflector (R) is of complex surface type, or type of parabolic generators, or elliptical type. Projecteur automobile, caractérisé en ce qu'il comporte au moins un module selon l'une des revendications précédentes.Automotive headlight, characterized in that it comprises at least one module according to one of the preceding claims.
EP06291787A 2005-11-24 2006-11-17 Lighting or signalling device for automotive vehicle Active EP1790906B1 (en)

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US7527404B2 (en) 2009-05-05
EP2299167B1 (en) 2021-05-19
PL2299167T3 (en) 2021-09-27
EP1790906B1 (en) 2012-04-11
PL1790906T3 (en) 2012-09-28
US20070115678A1 (en) 2007-05-24
FR2893701B1 (en) 2010-03-26
ES2882796T3 (en) 2021-12-02
ATE553332T1 (en) 2012-04-15
JP5085104B2 (en) 2012-11-28
JP2007149683A (en) 2007-06-14
FR2893701A1 (en) 2007-05-25
CN1975244A (en) 2007-06-06
ES2385721T3 (en) 2012-07-30
CN1975244B (en) 2011-01-26
EP2299167A1 (en) 2011-03-23

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