EP2733413B1 - Optical module for headlamps for automotive vehicles - Google Patents

Optical module for headlamps for automotive vehicles Download PDF

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Publication number
EP2733413B1
EP2733413B1 EP13192926.7A EP13192926A EP2733413B1 EP 2733413 B1 EP2733413 B1 EP 2733413B1 EP 13192926 A EP13192926 A EP 13192926A EP 2733413 B1 EP2733413 B1 EP 2733413B1
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EP
European Patent Office
Prior art keywords
lens
cache
optical module
rays
reflector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP13192926.7A
Other languages
German (de)
French (fr)
Other versions
EP2733413A1 (en
Inventor
Vincent Godbillon
Jean-Claude Puente
Ziyed Thabet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Vision SAS
Original Assignee
Valeo Vision SAS
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Filing date
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP2733413A1 publication Critical patent/EP2733413A1/en
Application granted granted Critical
Publication of EP2733413B1 publication Critical patent/EP2733413B1/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
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • 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
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/26—Elongated lenses
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/275—Lens surfaces, e.g. coatings or surface structures
    • 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
    • F21S41/338—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
    • 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
    • F21S41/37—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors characterised by their material, surface treatment or coatings
    • 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
    • F21W2102/18—Arrangement or contour of the emitted light for regions other than high beam or low beam for overhead signs

Definitions

  • the present invention relates to lighting devices for a motor vehicle and more particularly to an optical module for a lighting device, as known from the document DE 103 36 495 A1 .
  • An optical module is known that includes a light source and a reflector that reflects and transmits light rays emitted by the source to a lens.
  • the module usually includes a style mask. The style mask gives the device and the vehicle a style of its own, especially when the module is off.
  • part of these rays can leave the module through gaps present between the different elements of the optical module without being refracted by the lens, which is not in accordance with the regulations in force. .
  • the object of the invention is to remedy these drawbacks by providing an optical module that meets the regulations in force.
  • the terms "high”, “low”, “lower”, “higher”, are defined with respect to a vertical axis passing through the optical module and perpendicular to the optical axis of the module.
  • Another object according to the invention is a motor vehicle comprising an optical module according to the present invention.
  • the direction X is parallel to the optical axis of the optical module 10
  • the direction Y is perpendicular to the direction X and forms with the X axis a horizontal plane.
  • the Z axis is vertical and is perpendicular to the horizontal plane formed by the X and Y axes.
  • the optical module 10 comprises, for example, four reflectors 11, 12, 14, 16 disposed next to each other in the horizontal plane XY in the direction Y.
  • Each reflector 11, 12, 14, 16 is capable of reflecting light rays emitted by at least one light source 18, in this case one or more light-emitting diodes (LEDs), towards a lens 20 able to receive light rays from the LEDs 18.
  • the lens 20 has an input face 36.
  • the lens 20 extends transversely to a plane 21, parallel to the XY plane, and which comprises the optical axis of the optical module10.
  • the lens in its height is thus oriented globally parallel to the axis Z.
  • This lens also extends in a curved manner on either side of this plane 21.
  • This plane 21 is a horizontal plane of the lens 20 and median, or substantially median thereto, which separates the lens 20 into two vertically extending portions of equivalent, or substantially equivalent, dimensions.
  • the lens 20 is of low height, that is to say that its height is less than half of its length: it has a small vertical footprint.
  • Lens 20 is therefore preferably elongated and has four peripheral edges, an upper edge 28, two lateral edges 30 and a lower edge 32.
  • the optical module 10 comprises four LEDs 18. Each reflector 11, 12, 14, 16 respectively reflects light rays of a single LED 18, assigned to a single reflector.
  • the invention covers a situation where a single reflector reflects light rays from a plurality of light sources 18.
  • Each reflector 11, 12, 14 and 16 comprises at least one reflection surface having the shape of a conical, in the mathematical sense of the term.
  • the shape of the reflection surface may be predominantly ellipsoidal, or even formed a perfect ellipsoid.
  • the reflection surface is delimited downwards by the plane 21 of the lens 20.
  • the reflectors 11 and 12 are arranged so that they delimit, with the plane 21 of the lens 20 a common volume.
  • the reflectors 11 and 12 are intersected with each other, thus forming a group of reflectors.
  • Each LED 18 is positioned in the plane 21 of the lens 20 at the focus of each conic of the reflection surface, so as to emit light rays upwards.
  • the optical module 10 also comprises a plate 22, otherwise known as a folder, able to generate a cut in a light beam of the optical module 10, as well as to reflect rays emitted by the LEDs 18.
  • a part of the rays of the LED 18 received by the reflector 11, 12, 14, 16 is reflected towards the plate 22, which reflects them in turn towards the lens 20 so as to generate in the light beam a cut.
  • the plate 22 For a vehicle traveling on the right, the plate 22 generates a first horizontal cut for the rays reflected by a first reflector, or a first group of reflectors 14 and 16. This plate generates a second cut, called at 15 °, formed by a sector inclined at 15 ° to the horizontal and oriented upwards, continued by a horizontal sector. This second cut can cut the rays reflected by a second reflector, or second group of reflectors 11 and 12.
  • the optical module 10 further comprises two covers 24, 26, for example separate reflectors 11, 12, 14, 16, adapted to directly receive light rays LEDs 18.
  • the first cover 24 forms a material bridge between at least one reflectors 11, 12 and at least the upper edge 28 of the lens 20. According to the example of Figures 1 and 2 , the first cover 24 may be common to the two reflectors 11, 12 and form the bridge of material between the two reflectors 11, 12 and the upper edge 28 of the lens 20.
  • the second cover 26 forms a bridge of material between at least one of the reflectors 14, 16 and at least the upper edge 28 of the lens 20.
  • this second cover 26 may be common to the two reflectors 14, 16 and form the material bridge between the reflectors 14, 16 and the upper edge 28 of the lens 20.
  • the first cover 24 and / or the second cover 26 can thus each be formed by a single piece, assigned to at least two reflectors.
  • the lens is for example a unitary and one-piece piece which extends frontally along the four reflectors 11, 12, 14 and 16.
  • the optical module 10 may comprise two separate lenses, where one of 'between it is assigned to the combination formed by the first reflector 11 and the second reflector 12, while the other lens is assigned to third reflector 14 and fourth reflector 16.
  • the optical module 10 also comprises a support 100 on which at least the lens 20, the light sources 18 and a printed circuit board 101 carrying these light sources, as well as the reflectors 11, 12, are secured. 14, 16 extended by the first and the second cache 24, 26.
  • a support 100 can form a radiator for dissipating the calories generated by the light sources and electronic components embedded on the printed circuit board 101.
  • a radiator comprises ribs 105 which increases the heat exchange surface between the radiator and the air surrounding the optical module 10.
  • the optical module 10 may also comprise an electrical connector 102 fixed on the printed circuit board 101 and serving to supply and / or diagnose the electronic components and the light sources 18.
  • the support also comprises at least a first attachment arm 103 and a second fixing arm 104 which provide the mechanical connection between the optical module 10 and the automotive headlamp which receives this optical module 10.
  • the covers 24, 26 do not form a material bridge between the reflectors 11, 12, 14, 16 and side edges 30 or a lower edge 32 of the lens 20. In other words, the cover or covers 24, 26 are only in physical contact with the upper edge 28 of the lens 20.
  • the upper edge 28 has a free portion with respect to the covers 24, 26, that is to say that the covers 24, 26 are not present over the entire length of the upper edge 28.
  • a free portion of the upper edge 28, that is to say without physical contact with a cache, is located in a central zone of the lens, along the horizontal axis OY.
  • the first and / or second covers 24, 26 are integral with the reflectors 11, 12, 14, 16.
  • each cover 24, 26 comprises a lower face 34 able to reflect at least part of the rays received by the cover 24, 26.
  • the cover 24, 26 comprises, on its underside 34, a reflective coating. light rays, the coating may for example be deposited by aluminizing.
  • light rays emitted by the LED 18 are received directly by the first cache 24. This includes several portions.
  • the first cover 24 comprises a main upper portion 48 of concave curved shape. It comprises a point of inflection which is situated vertically higher than the upper edge 28 of the lens 20.
  • This main upper portion 48 is configured to return, on at least one half, for example greater, an entrance face 36 of the lens 20, at least a portion of the rays received 38.
  • the shape of the main upper portion 48 is arranged to return the light rays reflected thereon to all, or almost all, of the input face 36 of the lens 20.
  • the radii received 38 by the first mask 24 being reflected and distributed over at least one half or the entirety of the input face 36 of the lens 20, the radiation emitted by the reflector 11 towards the lens 20 without reflection on the first cache 24 is little or not disturbed. Indeed, it is avoided that the rays received by the first cover 24 are concentrated on a small surface of the lens 20 and can form a point whose light intensity is important and can create parasitic spots that do not comply with regulatory standards.
  • the cache used in the optical module according to the invention is configured to spread the rays on the lens 20 after reflection of these against the underside of the cache concerned.
  • the input face 36 of the lens 20 has, in addition, a zone of reliefs 44 contiguous to the lower edge 32 of the lens 20 and formed on a lower zone 42 of the lens 20.
  • the relief zone 44 is formed by one or more prisms which open from the input face 36 of the lens 20. This or these prisms may also be formed in the thickness of the lens 20, that is to say without exceeding a plane passing through the entrance face 36 of the lens 20. Alternatively, the prism or prisms mentioned above may be replaced by one or more streaks.
  • the first cover 24 also comprises a rear portion 50, of rectilinear shape seen in sagittal section, as shown in FIGS. Figures 4 and 5 , and which is in the extension of the main upper portion 48.
  • This rear portion 50 is configured to reflect at least a portion of the rays 40 received to a lower zone 42 of the lens 20, in this case, to the zone of reliefs 44. With this relief zone 44, the rays received 40 by the lower zone 42 of the lens 20 can provide a beam portion forming a gantry-type illumination. The light beam is thus reinforced by the rays recovered by the relief zone 44.
  • the lens 20 may have the zone of reliefs 44 over the whole of the lower zone 42 of the lens 20.
  • the lens 20 may comprise a plurality of relief zones 44 distributed horizontally along the lens, thus forming a discontinuity.
  • the first cover 24 is arranged so that it reflects no light beam towards the plate 22.
  • the rays 46 which are received on the front part of the main upper portion 48, towards its distal end 481 near the lens 20, are reflected under the plate 22, that is to say that they are reflected towards the bottom and back under the plate 22.
  • the first cover 24, and more particularly its main portion 48 is also configured so that it reflects no light beam in the direction an upper zone 54 of the lens 20 and that it does not form a screen between the upper zone 54 of the lens 20 and the light beam emitted directly by the reflector 11, that is to say without reflection on the first cover 24.
  • the upper zone 54 may also comprise reliefs, especially such as those described in relation to the relief zone 44 formed on the lower zone 42 of the lens 20.
  • the first cover 24 may advantageously also comprise an intermediate portion 52, located between the main upper portion 48 and the rear portion 50.
  • This intermediate portion 52 is arranged to receive no rays emitted by the LED 18. It preferably has a section sagittal rectilinear. The effect of this intermediate portion 52 is to provide a separation between the light rays reflected by the rear portion 50 and the light rays reflected by the main upper portion 48.
  • the cover 24 comprises successively three portions from its proximal end 500 in contact with the reflector 11 to its distal end 481 in contact with the lens 20: a rear portion 50, an intermediate portion 52 and a main portion 48.
  • the above detailed description in relation to the first cover 24 is transposable to the second cover 26.
  • the first cover 24 is assigned to the first and second reflectors 11 and 12 forming a common set, while the second cover 26 is assigned to the third reflector 14 and the fourth reflector 16, forming separate sets of point of view of their reflective function.
  • the third and fourth reflectors may form a unitary piece. Complementarily, it can be molded a single set of reflectors grouping the first, second, third and fourth reflectors.
  • the first cover 24 can extend beyond the upper edge 28 of the lens 20, towards the front of the optical module 10, so that it overlaps or overlaps the top of the lens 20.
  • this extension 56 does not form a screen between the upper zone 54 of the lens 20 with respect to the radiation emitted by the reflector 11 and the lens 20, without reflection on the first cover 24.
  • the extension 56 is in physical contact with the upper edge 28 of the lens 20.
  • the covers 24, 26 are further able to absorb a portion of the rays they receive.
  • the cover or covers 24, 26 may include for this purpose on a portion of their surface a treatment preventing any reflection of light rays from striking the cover.
  • a zone referenced 106 shows the presence of parasitic light rays.
  • the figure 7 illustrates on a screen the light beam produced by an optical module 10 having the cache or covers 24, 26. It is found by comparing these two figures that the presence of the covers 24, 26 effectively reduces the portion of the beam emitted upwards. , as illustrated by the area 106, while preserving light spots in the top of the beam, which correspond to the so-called gantry points.
  • the optical module 10 comprises covers 24, 26, the light beam produced is in accordance with the regulations in force for lighting and / or signaling devices, in particular the headlights of a motor vehicle.
  • a style cache that allows to give the lighting device and / or signaling a style of its own.
  • Such a style cache also makes it possible to hide the technical area of the projector, seen from outside it.
  • covers 24, 26 can be reported on the reflectors 12, 14, 16, the number of covers, reflectors and light sources can vary depending on the optical modules.
  • each cover 24, 26 may include a first portion adapted to absorb a portion of the received rays and a second portion adapted to reflect a portion of the rays received. It is also conceivable that a first cover is able to reflect the received rays while the second cover is able to absorb the rays received.
  • a first cache may include a first portion adapted to absorb a portion of the received rays and a second portion adapted to reflect a portion of the rays received, while the other cache is able to absorb the rays received or to the reflect.
  • the shape of the portions referenced 48, 50, 52 of the cover 24, 26 can be adapted in particular according to the general dimensions of the lighting and / or signaling device, the portions thus eliminating parasitic beams that do not comply with regulatory standards. .

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Description

La présente invention concerne les dispositifs d'éclairage pour véhicule automobile et plus particulièrement un module optique pour un dispositif d'éclairage, comme connu du document DE 103 36 495 A1 . On connaît un module optique qui comporte une source de lumière et un réflecteur qui réfléchit et transmet des rayons lumineux émis par la source vers une lentille. Pour des raisons esthétiques, le module comporte généralement un masque de style. Le masque de style confère au dispositif ainsi qu'au véhicule un style qui lui est propre, notamment lorsque le module est éteint.The present invention relates to lighting devices for a motor vehicle and more particularly to an optical module for a lighting device, as known from the document DE 103 36 495 A1 . An optical module is known that includes a light source and a reflector that reflects and transmits light rays emitted by the source to a lens. For aesthetic reasons, the module usually includes a style mask. The style mask gives the device and the vehicle a style of its own, especially when the module is off.

Toutefois, lorsque la source émet des rayons lumineux, une partie de ces rayons peut sortir du module à travers des interstices présents entre les différents éléments du module optique sans être réfractée par la lentille, ce qui n'est pas conforme à la réglementation en vigueur.However, when the source emits light rays, part of these rays can leave the module through gaps present between the different elements of the optical module without being refracted by the lens, which is not in accordance with the regulations in force. .

L'invention a pour but de remédier à ces inconvénients en fournissant un module optique qui répond à la réglementation en vigueur.The object of the invention is to remedy these drawbacks by providing an optical module that meets the regulations in force.

À cet effet, l'invention a pour objet un module optique pour un dispositif d'éclairage et/ou de signalisation pour véhicule automobile, le module optique comprenant :

  • au moins une source de lumière,
  • un réflecteur,
  • une lentille apte à recevoir des rayons lumineux de la source, et
  • un cache apte à recevoir directement des rayons lumineux de la source, le cache formant un pont de matière entre le réflecteur et au moins un bord supérieur de la lentille.
Selon l'invention:
  • le cache forme un pont de matière uniquement entre le réflecteur et le bord supérieur de la lentille. Ainsi, le cache ne fait pas un tour complet de la lentille. On réduit ainsi la quantité de matière utilisée en positionnant le cache de sorte qu'il bloque uniquement les rayons lumineux directement émis par la source vers le haut du module optique, entre le réflecteur et la lentille,
  • le module optique comporte en outre une plaque, autrement appelée plieuse, apte à former une coupure dans un faisceau généré par le module optique et à réfléchir des rayons lumineux de la source, le cache étant agencé de sorte qu'il ne réfléchit aucun rayon lumineux en direction de la plaque. On évite ainsi de perturber le faisceau lumineux émis par le module optique à travers la lentille,
  • le cache est configuré pour répartir une partie au moins des rayons lumineux reçus sur au moins une moitié de la face d'entrée de la lentille. Ainsi, le rayonnement émis par le réflecteur et la lentille sans réflexion sur le cache est peu ou pas perturbé. En effet, on évite que les rayons reçus par le cache soient concentrés sur une faible surface de la lentille et puissent former un point dont l'intensité lumineuse est importante. On évite ainsi la création d'un faisceau parasite après transmission à travers la lentille. L'étalement des rayons lumineux réparti par le cache permet de noyer le faisceau parasite dans le faisceau principal généré par le module optique.
For this purpose, the subject of the invention is an optical module for a lighting and / or signaling device for a motor vehicle, the optical module comprising:
  • at least one light source,
  • a reflector,
  • a lens adapted to receive light rays from the source, and
  • a cover adapted to directly receive light rays from the source, the cover forming a material bridge between the reflector and at least one upper edge of the lens.
According to the invention:
  • the cover forms a material bridge only between the reflector and the upper edge of the lens. Thus, the cache does not make a complete turn of the lens. This reduces the amount of material used by positioning the cover so that it blocks only the light rays directly emitted by the source towards the top of the optical module, between the reflector and the lens.
  • the optical module further comprises a plate, otherwise called a folder, able to form a cut in a beam generated by the optical module and to reflect light rays from the source, the cover being arranged so that it reflects no light beam towards the plate. This avoids disturbing the light beam emitted by the optical module through the lens,
  • the cover is configured to distribute at least a portion of the light rays received on at least one half of the input face of the lens. Thus, the radiation emitted by the reflector and the lens without reflection on the cache is little or not disturbed. Indeed, it is avoided that the rays received by the cover are concentrated on a small surface of the lens and can form a point whose light intensity is important. This avoids the creation of a parasitic beam after transmission through the lens. The spreading of the light rays distributed by the cover makes it possible to drown the parasitic beam in the main beam generated by the optical module.

Ainsi, les rayons lumineux émis directement de la source vers le cache sont bloqués de sorte qu'il n'y a pas de rayons lumineux, dit parasites, qui sortent du module optique, vers le haut, entre le réflecteur et la lentille. En effet, le cache forme une barrière continue entre le réflecteur et la lentille et empêche les rayons lumineux reçus par le cache de sortir du module optique sans être absorbés ou réfléchis par le cache. En outre, le cache est distinct du masque de style et ne modifie donc pas l'aspect esthétique du dispositif d'éclairage, notamment lorsque celui-ci est éteint.Thus, the light rays emitted directly from the source to the cache are blocked so that there are no light rays, called parasites, coming out of the optical module, upwards, between the reflector and the lens. Indeed, the cache forms a continuous barrier between the reflector and the lens and prevents the light rays received by the cache out of the optical module without being absorbed or reflected by the cache. In addition, the cover is distinct from the style mask and therefore does not change the aesthetic appearance of the lighting device, especially when it is off.

Par la suite, les termes « haut », « bas », « inférieur », « supérieur », sont définis par rapport à un axe vertical passant par le module optique et perpendiculaire à l'axe optique du module.Subsequently, the terms "high", "low", "lower", "higher", are defined with respect to a vertical axis passing through the optical module and perpendicular to the optical axis of the module.

Le module optique peut en outre comporter une ou plusieurs des caractéristiques suivantes, prises seules ou en combinaison :

  • le bord supérieur de la lentille comporte une partie libre à l'égard du cache,
  • le cache comprend un prolongement qui couvre au moins partiellement le bord supérieur de la lentille,
  • le cache est venu de matière avec le réflecteur. On peut donc fabriquer le cache et le réflecteur d'un seul tenant. Lorsque le cache et le réflecteur sont en matière plastique, le cache et le réflecteur peuvent être moulés dans un seul moule. On réduit ainsi le nombre de pièces à assembler,
  • alternativement, le cache et le réflecteur peuvent être formés par deux pièces distinctes, le cache étant fabriqué distinctement du réflecteur et de la lentille, puis rapporté sur le réflecteur et la lentille,
  • le cache est apte à absorber une partie au moins des rayons reçus par le cache,
  • le cache est apte à réfléchir une partie au moins des rayons lumineux reçus par le cache. Le cache peut ainsi comporter, sur une face inférieure, c'est-à-dire la face contre laquelle les rayons lumineux émis par la source lumineuse viennent frapper, un revêtement réfléchissant les rayons lumineux, le revêtement étant par exemple déposé par aluminiage. Une telle solution présente l'avantage de pratiquer un unique traitement à la fois pour le réflecteur et le cache,
  • le cache est configuré pour réfléchir au moins une partie des rayons reçus vers une zone inférieure de bord de la lentille. On peut ainsi utiliser une partie des rayons reçus par le cache et la diriger vers le haut après transmission par la lentille,
  • une face d'entrée de la lentille présente une zone de reliefs contiguë à un bord inférieur de la lentille, le cache étant configuré pour réfléchir au moins une partie des rayons reçus vers la zone de reliefs. Grâce à la zone de reliefs combinée à la réflexion du cache, on peut générer dans le faisceau général un ou des points d'éclairage dits de portiques, qui servent à éclairer les panneaux situés au-dessus de la route, par exemple des panneaux posés sur des portiques d'une autoroute,
  • la source est au moins une diode électroluminescente (LED).
The optical module may further comprise one or more of the following features, taken alone or in combination:
  • the upper edge of the lens has a free portion with respect to the cache,
  • the cover includes an extension which at least partially covers the upper edge of the lens,
  • the cache came from matter with the reflector. It is therefore possible to manufacture the cover and the reflector in one piece. When the cover and the reflector are made of plastic, the cover and the reflector can be molded in a single mold. This reduces the number of parts to be assembled,
  • alternatively, the cover and the reflector may be formed by two separate parts, the cover being manufactured separately from the reflector and the lens, and then attached to the reflector and the lens,
  • the cache is able to absorb at least part of the rays received by the cache,
  • the cover is able to reflect at least part of the light rays received by the cache. The cover may thus comprise, on a lower face, that is to say the face against which the light rays emitted by the light source strike, a coating reflecting the light rays, the coating being for example deposited by aluminizing. Such a solution has the advantage of practicing a single treatment for both the reflector and the cache,
  • the cover is configured to reflect at least a portion of the received rays to a lower edge area of the lens. It is thus possible to use a portion of the rays received by the cover and to direct it upwards after transmission by the lens,
  • an entrance face of the lens has a relief zone contiguous to a lower edge of the lens, the cover being configured to reflect at least a portion of the received rays to the relief zone. Thanks to the relief zone combined with the reflection of the cache, one can generate in the general beam or so-called lighting points of gantries, which serve to illuminate the panels located above the road, for example panels placed on gantries of a highway,
  • the source is at least one light emitting diode (LED).

L'invention a également pour objet un dispositif d'éclairage et/ou de signalisation pour véhicule automobile, notamment un projecteur, comprenant un module optique tel que défini précédemment.The invention also relates to a lighting and / or signaling device for a motor vehicle, in particular a projector, comprising an optical module as defined above.

Un autre objet selon l'invention est un véhicule automobile comprenant un module optique selon la présente invention.Another object according to the invention is a motor vehicle comprising an optical module according to the present invention.

L'invention sera mieux comprise à la lecture des figures annexées, qui sont fournies à titre d'exemples et ne présentent aucun caractère limitatif, dans lesquelles :

  • la figure 1 est une vue en perspective d'un module optique selon un premier mode de réalisation de l'invention,
  • la figure 2 est une vue en perspective vue d'un autre angle du module optique de la figure 1,
  • la figure 3 est une vue de côté du module optique de la figure 1 montrant en transparence les rayons réfléchis par un cache,
  • la figure 4 est une vue schématique en coupe du module optique de la figure 1 selon le plan IV-IV,
  • la figure 5 est une vue schématique en coupe similaire à celle de la figure 4 d'un module optique selon un deuxième mode de réalisation de l'invention,
  • la figure 6 illustre le faisceau de lumière produit par un module optique ne comportant pas de cache selon l'invention, tel qu'apparaissant sur un écran,
  • la figure 7 illustre le faisceau de lumière produit par un module selon l'invention, tel qu'apparaissant sur un écran.
The invention will be better understood on reading the appended figures, which are provided by way of examples and are in no way limiting, in which:
  • the figure 1 is a perspective view of an optical module according to a first embodiment of the invention,
  • the figure 2 is a perspective view from another angle of the optical module of the figure 1 ,
  • the figure 3 is a side view of the optical module of the figure 1 showing in transparency the rays reflected by a mask,
  • the figure 4 is a schematic sectional view of the optical module of the figure 1 according to plan IV-IV,
  • the figure 5 is a schematic sectional view similar to that of the figure 4 an optical module according to a second embodiment of the invention,
  • the figure 6 illustrates the light beam produced by an optical module having no cache according to the invention, as appearing on a screen,
  • the figure 7 illustrates the light beam produced by a module according to the invention, as appearing on a screen.

On a représenté sur les figures 1 et 2 un module optique 10 pour un dispositif d'éclairage et/ou de signalisation pour véhicule automobile.We have shown on Figures 1 and 2 an optical module 10 for a lighting and / or signaling device for a motor vehicle.

Pour plus de simplicité par la suite, on se référera au repère orthonormé XYZ présenté sur les différentes figures, dans lequel la direction X est parallèle à l'axe optique du module optique 10, la direction Y est perpendiculaire à la direction X et forme avec l'axe X un plan horizontal. L'axe Z est vertical et est perpendiculaire au plan horizontal formé par les axes X et Y.For simplicity later, reference will be made to the orthonormal reference XYZ shown in the various figures, in which the direction X is parallel to the optical axis of the optical module 10, the direction Y is perpendicular to the direction X and forms with the X axis a horizontal plane. The Z axis is vertical and is perpendicular to the horizontal plane formed by the X and Y axes.

Le module optique 10 comprend par exemple quatre réflecteurs 11, 12, 14, 16 disposés l'un à côté de l'autre dans le plan horizontal XY selon la direction Y. Chaque réflecteur 11, 12, 14, 16 est apte à réfléchir des rayons lumineux émis par au moins une source de lumière 18, dans le cas présent une ou des diodes électroluminescentes (LEDs), vers une lentille 20 apte à recevoir des rayons lumineux des LEDs 18. La lentille 20 comporte une face d'entrée 36.The optical module 10 comprises, for example, four reflectors 11, 12, 14, 16 disposed next to each other in the horizontal plane XY in the direction Y. Each reflector 11, 12, 14, 16 is capable of reflecting light rays emitted by at least one light source 18, in this case one or more light-emitting diodes (LEDs), towards a lens 20 able to receive light rays from the LEDs 18. The lens 20 has an input face 36.

La lentille 20 s'étend transversalement à un plan 21, parallèle au plan XY, et qui comprend l'axe optique du module optique10. La lentille dans sa hauteur est donc orientée globalement parallèlement à l'axe Z. Cette lentille s'étend également de manière courbée de part et d'autre de ce plan 21. Ce plan 21 est un plan horizontal de la lentille 20 et médian, ou sensiblement médian à celle-ci, qui sépare la lentille 20 en deux portions s'étendant verticalement et de dimensions équivalentes, ou sensiblement équivalentes.The lens 20 extends transversely to a plane 21, parallel to the XY plane, and which comprises the optical axis of the optical module10. The lens in its height is thus oriented globally parallel to the axis Z. This lens also extends in a curved manner on either side of this plane 21. This plane 21 is a horizontal plane of the lens 20 and median, or substantially median thereto, which separates the lens 20 into two vertically extending portions of equivalent, or substantially equivalent, dimensions.

Selon une caractéristique préférée, la lentille 20 est de faible hauteur, c'est-à-dire que sa hauteur est inférieure à la moitié de sa longueur : elle présente un faible encombrement vertical. La lentille 20 est donc de préférence de forme allongée et comporte quatre bords périphériques, un bord supérieur 28, deux bords latéraux 30 et un bord inférieur 32.According to a preferred feature, the lens 20 is of low height, that is to say that its height is less than half of its length: it has a small vertical footprint. Lens 20 is therefore preferably elongated and has four peripheral edges, an upper edge 28, two lateral edges 30 and a lower edge 32.

Dans le mode de réalisation des figures 1 et 2, le module optique 10 comprend quatre LEDs 18. Chaque réflecteur 11, 12, 14, 16 réfléchit respectivement des rayons lumineux d'une unique LED 18, affectée à un unique réflecteur. Alternativement, l'invention couvre une situation où un unique réflecteur réfléchit des rayons lumineux en provenance d'une pluralité de sources lumineuses 18.In the embodiment of Figures 1 and 2 the optical module 10 comprises four LEDs 18. Each reflector 11, 12, 14, 16 respectively reflects light rays of a single LED 18, assigned to a single reflector. Alternatively, the invention covers a situation where a single reflector reflects light rays from a plurality of light sources 18.

Chaque réflecteur 11, 12, 14 et 16 comprend au moins une surface de réflexion ayant la forme d'une conique, au sens mathématique du terme. A titre d'exemple, la forme de la surface de réflexion peut être majoritairement ellipsoïdale, ou même formé un ellipsoïde parfait. La surface de réflexion est délimitée vers le bas par le plan 21 de la lentille 20. Dans le mode de réalisation des figures 1 à 3, les réflecteurs 11 et 12 sont disposés de sorte qu'ils délimitent, avec le plan 21 de la lentille 20 un volume commun. En d'autres termes, les réflecteurs 11 et 12 sont intersectés l'un avec l'autre, formant ainsi un groupe de réflecteurs. Chaque LED 18 est positionnée dans le plan 21 de la lentille 20 au foyer de chaque conique de la surface de réflexion, de sorte à émettre des rayons lumineux vers le haut.Each reflector 11, 12, 14 and 16 comprises at least one reflection surface having the shape of a conical, in the mathematical sense of the term. For example, the shape of the reflection surface may be predominantly ellipsoidal, or even formed a perfect ellipsoid. The reflection surface is delimited downwards by the plane 21 of the lens 20. In the embodiment of the Figures 1 to 3 , the reflectors 11 and 12 are arranged so that they delimit, with the plane 21 of the lens 20 a common volume. In other words, the reflectors 11 and 12 are intersected with each other, thus forming a group of reflectors. Each LED 18 is positioned in the plane 21 of the lens 20 at the focus of each conic of the reflection surface, so as to emit light rays upwards.

Les réflecteurs délimitent ainsi une cavité ouverte vers la lentille 20, au sein de laquelle cavité la au moins une source lumineuse est logée.The reflectors thus delimit an open cavity towards the lens 20, within which cavity the at least one light source is housed.

Le module optique 10 comporte également une plaque 22, autrement appelée plieuse, apte à générer une coupure dans un faisceau lumineux du module optique 10, ainsi qu'à réfléchir des rayons émis par les LEDs 18. Ainsi, une partie des rayons de la LED 18 reçus par le réflecteur 11, 12, 14, 16 est réfléchie vers la plaque 22, qui les réfléchit à son tour vers la lentille 20 de sorte à générer dans le faisceau lumineux une coupure.The optical module 10 also comprises a plate 22, otherwise known as a folder, able to generate a cut in a light beam of the optical module 10, as well as to reflect rays emitted by the LEDs 18. Thus, a part of the rays of the LED 18 received by the reflector 11, 12, 14, 16 is reflected towards the plate 22, which reflects them in turn towards the lens 20 so as to generate in the light beam a cut.

Pour un véhicule circulant à droite, la plaque 22 génère une première coupure horizontale pour les rayons réfléchis par un premier réflecteur, ou un premier groupe de réflecteurs 14 et 16. Cette plaque génère une deuxième coupure, dite à 15°, formée par un secteur incliné à 15° par rapport à l'horizontal et orienté vers le haut, poursuivit par un secteur horizontal. Cette deuxième coupure peut couper les rayons réfléchis par un deuxième réflecteur, ou deuxième groupe de réflecteurs 11 et 12.For a vehicle traveling on the right, the plate 22 generates a first horizontal cut for the rays reflected by a first reflector, or a first group of reflectors 14 and 16. This plate generates a second cut, called at 15 °, formed by a sector inclined at 15 ° to the horizontal and oriented upwards, continued by a horizontal sector. This second cut can cut the rays reflected by a second reflector, or second group of reflectors 11 and 12.

Le module optique 10 comporte en outre deux caches 24, 26, par exemple distincts des réflecteurs 11, 12, 14, 16, aptes à recevoir directement des rayons lumineux des LEDs 18. Le premier cache 24 forme un pont de matière entre au moins un des réflecteurs 11, 12 et au moins le bord supérieur 28 de la lentille 20. Selon l'exemple des figures 1 et 2, le premier cache 24 peut être commun aux deux réflecteurs 11, 12 et forme le pont de matière entre les deux réflecteurs 11, 12 et le bord supérieur 28 de la lentille 20.The optical module 10 further comprises two covers 24, 26, for example separate reflectors 11, 12, 14, 16, adapted to directly receive light rays LEDs 18. The first cover 24 forms a material bridge between at least one reflectors 11, 12 and at least the upper edge 28 of the lens 20. According to the example of Figures 1 and 2 , the first cover 24 may be common to the two reflectors 11, 12 and form the bridge of material between the two reflectors 11, 12 and the upper edge 28 of the lens 20.

De manière similaire, le deuxième cache 26 forme un pont de matière entre au moins un des réflecteurs 14, 16 et au moins le bord supérieur 28 de la lentille 20. Avantageusement, ce deuxième cache 26 peut être commun aux deux réflecteurs 14, 16 et forme le pont de matière entre les réflecteurs 14, 16 et le bord supérieur 28 de la lentille 20.Similarly, the second cover 26 forms a bridge of material between at least one of the reflectors 14, 16 and at least the upper edge 28 of the lens 20. Advantageously, this second cover 26 may be common to the two reflectors 14, 16 and form the material bridge between the reflectors 14, 16 and the upper edge 28 of the lens 20.

Le premier cache 24 et/ou le deuxième cache 26 peuvent ainsi être formés chacun par une seule et unique pièce, affectée à au moins deux réflecteurs.The first cover 24 and / or the second cover 26 can thus each be formed by a single piece, assigned to at least two reflectors.

On notera que la lentille est par exemple une pièce unitaire et monobloc qui s'étend frontalement le long des quatre réflecteurs 11, 12, 14 et 16. De manière alternative, le module optique 10 peut comprendre deux lentilles séparées, où l'une d'entre elle est affectée à la combinaison formée par le premier réflecteur 11 et le deuxième réflecteur 12, alors que l'autre lentille est affectée au troisième réflecteur 14 et au quatrième réflecteur 16.It will be noted that the lens is for example a unitary and one-piece piece which extends frontally along the four reflectors 11, 12, 14 and 16. Alternatively, the optical module 10 may comprise two separate lenses, where one of 'between it is assigned to the combination formed by the first reflector 11 and the second reflector 12, while the other lens is assigned to third reflector 14 and fourth reflector 16.

Le module optique 10 selon l'invention comprend encore un support 100 sur lequel sont solidarisés au moins la lentille 20, les sources de lumière 18 et une plaque de circuit imprimé 101 porteuse de ces sources de lumière, ainsi que les réflecteurs 11, 12, 14, 16 prolongé par le premier et le deuxième cache 24, 26. Un tel support 100 peut former un radiateur permettant de dissiper les calories générées par les sources de lumières et les composants électroniques embarqués sur la plaque de circuit imprimé 101. Un tel radiateur comprend des nervures 105 qui augmente la surface d'échange thermique entre le radiateur et l'air environnant le module optique 10.The optical module 10 according to the invention also comprises a support 100 on which at least the lens 20, the light sources 18 and a printed circuit board 101 carrying these light sources, as well as the reflectors 11, 12, are secured. 14, 16 extended by the first and the second cache 24, 26. Such a support 100 can form a radiator for dissipating the calories generated by the light sources and electronic components embedded on the printed circuit board 101. Such a radiator comprises ribs 105 which increases the heat exchange surface between the radiator and the air surrounding the optical module 10.

Le module optique 10 peut également comporter un connecteur électrique 102 fixé sur la plaque de circuit imprimé 101 et servant à alimenter et/ou diagnostiquer les composants électroniques et les sources de lumière 18. Le support comprend également au moins un premier bras de fixation 103 et un deuxième bras de fixation 104 qui assurent la liaison mécanique entre le module optique 10 et le projecteur automobile qui reçoit ce module optique 10.The optical module 10 may also comprise an electrical connector 102 fixed on the printed circuit board 101 and serving to supply and / or diagnose the electronic components and the light sources 18. The support also comprises at least a first attachment arm 103 and a second fixing arm 104 which provide the mechanical connection between the optical module 10 and the automotive headlamp which receives this optical module 10.

Comme on peut le voir sur la figure 1, les caches 24, 26 ne forment pas de pont de matière entre les réflecteurs 11, 12, 14, 16 et des bords latéraux 30 ou un bord inférieur 32 de la lentille 20. Autrement dit, le ou les caches 24, 26 sont uniquement en contact physique avec le bord supérieur 28 de la lentille 20.As can be seen on the figure 1 , the covers 24, 26 do not form a material bridge between the reflectors 11, 12, 14, 16 and side edges 30 or a lower edge 32 of the lens 20. In other words, the cover or covers 24, 26 are only in physical contact with the upper edge 28 of the lens 20.

En outre, le bord supérieur 28 comporte une partie libre à l'égard des caches 24, 26, c'est-à-dire que les caches 24, 26 ne sont pas présents sur toute la longueur du bord supérieur 28. Une telle partie libre du bord supérieur 28, c'est-à-dire dépourvue de contact physique avec un cache, se situe dans une zone centrale de la lentille, selon l'axe horizontal OY.In addition, the upper edge 28 has a free portion with respect to the covers 24, 26, that is to say that the covers 24, 26 are not present over the entire length of the upper edge 28. Such a free portion of the upper edge 28, that is to say without physical contact with a cache, is located in a central zone of the lens, along the horizontal axis OY.

Selon un exemple de réalisation, les premier et/ou deuxième caches 24, 26 sont venus de matière avec les réflecteurs 11, 12, 14, 16. Comme on le voit sur la figure 4, chaque cache 24, 26 comprend une face inférieure 34 apte à réfléchir une partie au moins des rayons reçus par le cache 24, 26. Dans le cas présent, le cache 24, 26 comporte, sur sa face inférieure 34, un revêtement réfléchissant les rayons lumineux, le revêtement pouvant par exemple être déposé par aluminiage.According to an exemplary embodiment, the first and / or second covers 24, 26 are integral with the reflectors 11, 12, 14, 16. As can be seen in FIG. figure 4 , each cover 24, 26 comprises a lower face 34 able to reflect at least part of the rays received by the cover 24, 26. In this case, the cover 24, 26 comprises, on its underside 34, a reflective coating. light rays, the coating may for example be deposited by aluminizing.

Comme cela est représenté sur les figures 3 et 4, des rayons lumineux émis par la LED 18 sont reçus directement par le premier cache 24. Celui-ci comprend plusieurs portions.As shown on the figures 3 and 4 , light rays emitted by the LED 18 are received directly by the first cache 24. This includes several portions.

En vue en coupe, le premier cache 24 comprend une portion supérieure principale 48 de forme courbe concave. Elle comporte un point d'inflexion qui est situé verticalement plus haut que le bord supérieure 28 de la lentille 20. Cette portion supérieure principale 48 est configurée pour renvoyer, sur au moins une moitié, par exemple supérieure, d'une face d'entrée 36 de la lentille 20, une partie au moins des rayons reçus 38.In sectional view, the first cover 24 comprises a main upper portion 48 of concave curved shape. It comprises a point of inflection which is situated vertically higher than the upper edge 28 of the lens 20. This main upper portion 48 is configured to return, on at least one half, for example greater, an entrance face 36 of the lens 20, at least a portion of the rays received 38.

De manière avantageuse, la forme de la portion supérieure principale 48 est agencée pour renvoyer les rayons lumineux réfléchis sur celle-ci vers l'intégralité, ou quasiment l'intégralité, de la face d'entrée 36 de la lentille 20.Advantageously, the shape of the main upper portion 48 is arranged to return the light rays reflected thereon to all, or almost all, of the input face 36 of the lens 20.

Les rayons reçus 38 par le premier cache 24 étant réfléchis et répartis sur au moins une moitié ou l'intégralité de la face d'entrée 36 de la lentille 20, le rayonnement émis par le réflecteur 11 vers la lentille 20 sans réflexion sur le premier cache 24 est peu ou pas perturbé. En effet, on évite que les rayons reçus par le premier cache 24 soient concentrés sur une faible surface de la lentille 20 et puissent former un point dont l'intensité lumineuse est importante et qui peut créer des spots parasites non conformes aux normes réglementaires.The radii received 38 by the first mask 24 being reflected and distributed over at least one half or the entirety of the input face 36 of the lens 20, the radiation emitted by the reflector 11 towards the lens 20 without reflection on the first cache 24 is little or not disturbed. Indeed, it is avoided that the rays received by the first cover 24 are concentrated on a small surface of the lens 20 and can form a point whose light intensity is important and can create parasitic spots that do not comply with regulatory standards.

On comprend donc que le cache employé dans le module optique selon l'invention est configuré pour étaler les rayons sur la lentille 20 après réflexion de ceux-ci contre la face inférieure du cache concerné.It is therefore understood that the cache used in the optical module according to the invention is configured to spread the rays on the lens 20 after reflection of these against the underside of the cache concerned.

La face d'entrée 36 de la lentille 20 présente, en outre, une zone de reliefs 44 contiguë au bord inférieur 32 de la lentille 20 et ménagée sur une zone inférieure 42 de la lentille 20 Selon un exemple de réalisation, la zone de reliefs 44 est formée par un ou plusieurs prismes qui débouchent de la face d'entrée 36 de la lentille 20. Ce ou ces prismes peuvent également être formés dans l'épaisseur de la lentille 20, c'est-à-dire sans dépasser d'un plan passant par la face d'entrée 36 de la lentille 20. Alternativement, le ou les prismes évoqués ci-dessus peuvent être remplacés par une ou plusieurs stries.The input face 36 of the lens 20 has, in addition, a zone of reliefs 44 contiguous to the lower edge 32 of the lens 20 and formed on a lower zone 42 of the lens 20. According to an exemplary embodiment, the relief zone 44 is formed by one or more prisms which open from the input face 36 of the lens 20. This or these prisms may also be formed in the thickness of the lens 20, that is to say without exceeding a plane passing through the entrance face 36 of the lens 20. Alternatively, the prism or prisms mentioned above may be replaced by one or more streaks.

Le premier cache 24 comprend également une portion arrière 50, de forme rectiligne vu en coupe sagittale, telle que représenté sur les figures 4 et 5, et qui se situe dans le prolongement de la portion supérieure principale 48. Cette portion arrière 50 est configurée pour réfléchir au moins une partie des rayons 40 reçus vers une zone inférieure 42 de la lentille 20, dans le cas présent, vers la zone de reliefs 44. Grâce à cette zone de reliefs 44, les rayons reçus 40 par la zone inférieure 42 de la lentille 20 permettent de fournir une portion de faisceau formant un éclairage de type portique. Le faisceau lumineux est ainsi renforcé par les rayons récupérés par la zone de reliefs 44.The first cover 24 also comprises a rear portion 50, of rectilinear shape seen in sagittal section, as shown in FIGS. Figures 4 and 5 , and which is in the extension of the main upper portion 48. This rear portion 50 is configured to reflect at least a portion of the rays 40 received to a lower zone 42 of the lens 20, in this case, to the zone of reliefs 44. With this relief zone 44, the rays received 40 by the lower zone 42 of the lens 20 can provide a beam portion forming a gantry-type illumination. The light beam is thus reinforced by the rays recovered by the relief zone 44.

Selon une variante, la lentille 20 peut présenter la zone de reliefs 44 sur l'intégralité de la zone inférieure 42 de la lentille 20. Alternativement, la lentille 20 peut comporter une pluralité de zones de reliefs 44 réparties horizontalement le long de la lentille, formant ainsi une discontinuité. Ainsi, il est possible d'utiliser seulement une partie des rayons réfléchis par la portion arrière 50 vers la zone inférieure 42 pour réaliser l'éclairage de type portique.According to one variant, the lens 20 may have the zone of reliefs 44 over the whole of the lower zone 42 of the lens 20. Alternatively, the lens 20 may comprise a plurality of relief zones 44 distributed horizontally along the lens, thus forming a discontinuity. Thus, it is possible to use only a portion of the rays reflected by the rear portion 50 to the lower zone 42 to achieve gantry type lighting.

De plus, le premier cache 24 est agencé de sorte qu'il ne réfléchit aucun rayon lumineux en direction de la plaque 22. Comme cela est représenté sur la figure 4, les rayons 46 qui sont reçus sur la partie avant de la portion supérieure principale 48, vers son extrémité distale 481 à proximité de la lentille 20, sont réfléchis sous la plaque 22, c'est-à-dire qu'ils sont réfléchis vers le bas et vers l'arrière sous la plaque 22.In addition, the first cover 24 is arranged so that it reflects no light beam towards the plate 22. As shown in FIG. figure 4 , the rays 46 which are received on the front part of the main upper portion 48, towards its distal end 481 near the lens 20, are reflected under the plate 22, that is to say that they are reflected towards the bottom and back under the plate 22.

Le premier cache 24, et plus particulièrement sa portion principale 48, est également configuré de sorte qu'il ne réfléchit aucun rayon lumineux en direction d'une zone supérieure 54 de la lentille 20 et qu'il ne forme pas un écran entre la zone supérieure 54 de la lentille 20 et le faisceau lumineux émis directement par le réflecteur 11, c'est-à-dire sans réflexion sur le premier cache 24. Ainsi, le faisceau lumineux généré par le réflecteur 11 combiné la lentille 20, sans réflexion sur le premier cache 24 en direction de la zone supérieure 54, n'est pas perturbé. La zone supérieure 54 peut également comporter des reliefs, notamment tels que ceux décrit en rapport avec la zone de reliefs 44 ménagée sur la zone inférieure 42 de la lentille 20.The first cover 24, and more particularly its main portion 48, is also configured so that it reflects no light beam in the direction an upper zone 54 of the lens 20 and that it does not form a screen between the upper zone 54 of the lens 20 and the light beam emitted directly by the reflector 11, that is to say without reflection on the first cover 24. Thus, the light beam generated by the reflector 11 combined the lens 20, without reflection on the first cover 24 towards the upper zone 54, is not disturbed. The upper zone 54 may also comprise reliefs, especially such as those described in relation to the relief zone 44 formed on the lower zone 42 of the lens 20.

Le premier cache 24 peut avantageusement comprendre également une portion intermédiaire 52, située entre la portion supérieure principale 48 et la portion arrière 50. Cette portion intermédiaire 52 est agencée pour ne pas recevoir de rayons émis par la LED 18. Elle présente de préférence une section sagittale rectiligne. L'effet de cette portion intermédiaire 52 est ménager une séparation entre les rayons lumineux renvoyés par la portion arrière 50 et les rayons lumineux renvoyés par la portion supérieure principale 48.The first cover 24 may advantageously also comprise an intermediate portion 52, located between the main upper portion 48 and the rear portion 50. This intermediate portion 52 is arranged to receive no rays emitted by the LED 18. It preferably has a section sagittal rectilinear. The effect of this intermediate portion 52 is to provide a separation between the light rays reflected by the rear portion 50 and the light rays reflected by the main upper portion 48.

Ainsi, de manière préférée, le cache 24 selon l'invention comprend successivement trois portions depuis son extrémité proximale 500 en contact avec le réflecteur 11 jusqu'à son extrémité distale 481 en contact avec la lentille 20 : une portion arrière 50, une portion intermédiaire 52 et une portion principale 48.Thus, preferably, the cover 24 according to the invention comprises successively three portions from its proximal end 500 in contact with the reflector 11 to its distal end 481 in contact with the lens 20: a rear portion 50, an intermediate portion 52 and a main portion 48.

Les dimensions et orientations de ces différentes portions sont déterminées par leurs spécifications exposées précédemment et dépendent notamment des paramètres suivants : distance source lumineuse 18 - lentille 20, distance plaque 22 - lentille 20, hauteur de la lentille 20, hauteur de la zone de reliefs 44, dimensions du réflecteur 11.The dimensions and orientations of these different portions are determined by their previously described specifications and depend in particular on the following parameters: light source distance 18 - lens 20, distance plate 22 - lens 20, height of the lens 20, height of the relief zone 44 , dimensions of the reflector 11.

En particulier, on notera que les lignes d'inflexions 501 et 521 qui marquent respectivement le bord proximal et le bord distal de la portion intermédiaire 52 correspondent, respectivement, au rayon frappant l'extrémité inférieure de la zone de reliefs 44 de la lentille 20 et au rayon frappant l'extrémité supérieure de la face d'entrée 36 de la lentille.In particular, it will be noted that the inflection lines 501 and 521 which respectively mark the proximal edge and the distal edge of the intermediate portion 52 respectively correspond to the radius striking the lower end of the relief zone 44 of the lens 20. and the ray striking the upper end of the input face 36 of the lens.

La description détaillée ci-dessus en rapport avec le premier cache 24 est transposable au deuxième cache 26. Le premier cache 24 est affecté aux premier et deuxième réflecteurs 11 et 12 formant un ensemble commun, alors que le deuxième cache 26 est affecté au troisième réflecteur 14 et au quatrième réflecteur 16, formant des ensembles distincts de point de vue de leur fonction réfléchissante. Bien entendu, le troisième et le quatrième réflecteur peuvent former une pièce unitaire. De manière complémentaire, il peut être moulé un unique ensemble de réflecteurs regroupant le premier, le deuxième, le troisième et le quatrième réflecteur.The above detailed description in relation to the first cover 24 is transposable to the second cover 26. The first cover 24 is assigned to the first and second reflectors 11 and 12 forming a common set, while the second cover 26 is assigned to the third reflector 14 and the fourth reflector 16, forming separate sets of point of view of their reflective function. Good Of course, the third and fourth reflectors may form a unitary piece. Complementarily, it can be molded a single set of reflectors grouping the first, second, third and fourth reflectors.

Dans le mode de réalisation de la figure 5, dans lequel les éléments communs aux deux modes de réalisation sont identifiés par les mêmes références numériques, le premier cache 24 peut se prolonger au-delà du bord supérieur 28 de la lentille 20, vers l'avant du module optique 10, de sorte qu'il recouvre ou chevauche le haut de la lentille 20. Toutefois, ce prolongement 56 ne forme pas un écran entre la zone supérieure 54 de la lentille 20 à l'égard du rayonnement émis par le réflecteur 11 et la lentille 20, sans réflexion sur le premier cache 24. Selon un exemple de réalisation, le prolongement 56 est en contact physique avec le bord supérieur 28 de la lentille 20.In the embodiment of the figure 5 , in which the elements common to the two embodiments are identified by the same reference numerals, the first cover 24 can extend beyond the upper edge 28 of the lens 20, towards the front of the optical module 10, so that it overlaps or overlaps the top of the lens 20. However, this extension 56 does not form a screen between the upper zone 54 of the lens 20 with respect to the radiation emitted by the reflector 11 and the lens 20, without reflection on the first cover 24. According to an exemplary embodiment, the extension 56 is in physical contact with the upper edge 28 of the lens 20.

Dans une variante des modes de réalisation décrits ci-dessus, les caches 24, 26 sont en outre aptes à absorber une partie des rayons qu'ils reçoivent. Le ou les caches 24, 26 peuvent dont comporter à cette fin sur une partie de leur surface un traitement empêchant toute réflexion des rayons lumineux venant frapper le cache.In a variant of the embodiments described above, the covers 24, 26 are further able to absorb a portion of the rays they receive. The cover or covers 24, 26 may include for this purpose on a portion of their surface a treatment preventing any reflection of light rays from striking the cover.

Sur la figure 6, on a représenté sur un écran le faisceau de lumière généré par un module optique 10 ne comportant pas de cache 24, 26. Une zone référencée 106 montre la présence de rayons lumineux parasites.On the figure 6 the light beam generated by an optical module 10 having no cache 24, 26 is represented on a screen. A zone referenced 106 shows the presence of parasitic light rays.

A l'inverse, la figure 7 illustre sur un écran le faisceau de lumière produit par un module optique 10 comportant le ou les caches 24, 26. On constate en comparant ces deux figures que la présence des caches 24, 26 permet de réduire efficacement la partie du faisceau émis vers le haut, tel qu'illustrée par la zone 106, tout en préservant des points lumineux dans le haut du faisceau, qui correspondent aux points dits de portique. Ainsi, lorsque le module optique 10 comprend des caches 24, 26, le faisceau de lumière produit est conforme à la réglementation en vigueur pour les dispositifs d'éclairage et/ou de signalisation, notamment les projecteurs avant de véhicule automobile.Conversely, the figure 7 illustrates on a screen the light beam produced by an optical module 10 having the cache or covers 24, 26. It is found by comparing these two figures that the presence of the covers 24, 26 effectively reduces the portion of the beam emitted upwards. , as illustrated by the area 106, while preserving light spots in the top of the beam, which correspond to the so-called gantry points. Thus, when the optical module 10 comprises covers 24, 26, the light beam produced is in accordance with the regulations in force for lighting and / or signaling devices, in particular the headlights of a motor vehicle.

On constate par ailleurs que le reste du faisceau produit est peu ou pas modifié et ne présente pas de zones de surintensité lumineuse ou de spots parasites.It is also noted that the rest of the beam produced is little or not modified and does not have areas of light overcurrent or spurious spots.

On peut ensuite rapporter sur le module optique 10, ou autour de celui-ci, un cache de style qui permet de donner au dispositif d'éclairage et/ou de signalisation un style qui lui est propre. Un tel cache de style permet également de cacher la zone technique du projecteur, vu de l'extérieur de celui-ci.We can then report on the optical module 10, or around it, a style cache that allows to give the lighting device and / or signaling a style of its own. Such a style cache also makes it possible to hide the technical area of the projector, seen from outside it.

L'invention n'est pas limitée aux modes de réalisations présentées et d'autres modes de réalisation apparaîtront clairement à l'homme du métier. Notamment, les caches 24, 26 peuvent être rapportés sur les réflecteurs 12, 14, 16, le nombre de caches, de réflecteurs et de sources de lumière peut varier selon les modules optiques.The invention is not limited to the embodiments presented and other embodiments will become apparent to those skilled in the art. In particular, the covers 24, 26 can be reported on the reflectors 12, 14, 16, the number of covers, reflectors and light sources can vary depending on the optical modules.

En outre, chaque cache 24, 26 peut comporter une première partie apte à absorber une partie des rayons reçus et une seconde partie apte à réfléchir une partie des rayons reçus. On peut également envisager qu'un premier cache soit apte à réfléchir les rayons reçus tandis que le deuxième cache soit apte à absorber les rayons reçus. De même, un premier cache peut comporter une première partie apte à absorber une partie des rayons reçus et une seconde partie apte à réfléchir une partie des rayons reçus, alors que l'autre cache est apte soit à absorber les rayons reçus, soit à les réfléchir. La forme des portions référencées 48, 50, 52 du cache 24, 26 peut être adaptée notamment en fonction des dimensions générales du dispositif d'éclairage et/ou de signalisation, les portions éliminant ainsi des faisceaux parasites qui ne sont pas conformes aux normes réglementaires.In addition, each cover 24, 26 may include a first portion adapted to absorb a portion of the received rays and a second portion adapted to reflect a portion of the rays received. It is also conceivable that a first cover is able to reflect the received rays while the second cover is able to absorb the rays received. Similarly, a first cache may include a first portion adapted to absorb a portion of the received rays and a second portion adapted to reflect a portion of the rays received, while the other cache is able to absorb the rays received or to the reflect. The shape of the portions referenced 48, 50, 52 of the cover 24, 26 can be adapted in particular according to the general dimensions of the lighting and / or signaling device, the portions thus eliminating parasitic beams that do not comply with regulatory standards. .

Claims (12)

  1. Optical module (10) for a lighting device for motor vehicles, comprising at least:
    - an optical axis,
    - at least one light source (18),
    - a lens (20) receiving light rays from the source (18) and including an entry face (36) and an upper edge (28),
    - a reflector (11, 12, 14, 16), returning light rays from the at least one light source (18) toward the entry face (36) of the lens (20),
    - a plate (22) adapted to form a break in a light beam generated by the optical module and to reflect rays from the light source (18), and
    - a cache (24, 26) forming a bridge of material between the reflector (11, 12, 14, 16) and at least the upper edge (28) of the lens (20),
    characterized in that the cache (24, 26) receives light rays directly from the source (18) and reflects at least some of these received rays toward the lens (20), said cache (24, 26) including a plurality of portions, namely a main portion (48) that is in the shape of a concave curve and that includes an inflection point that is situated vertically higher than the upper edge (28) of the lens (20), this main portion (48) being configured to distribute at least some of the directly received rays over at least half of the entry face (36) of the lens (20) while not reflecting any light ray in the direction of the plate (22).
  2. Optical module (10) according to Claim 1, characterized in that the cache (24, 26) also includes a rear portion (50) that is situated in the extension of the main portion (48) toward the reflector, this rear portion (50) of the cache (24, 26) being configured to reflect at least some of the directly received rays toward a lower zone (42) of the lens (20).
  3. Optical module (10) according to Claim 2, characterized in that the cache (24, 26) includes three successive portions from the reflector (11, 12, 14, 16) toward the lens (20), said rear portion (50), an intermediate portion (52) and said main portion (48), and the intermediate portion (52) is arranged so as not to receive light rays originating from the at least one light source (18).
  4. Optical module (10) according to any one of the preceding claims, wherein the cache (24, 26) forms a bridge of material only between the reflector (11, 12, 14, 16) and the upper edge (28) of the lens (20).
  5. Optical module (10) according to any one of the preceding claims, wherein the upper edge (28) of the lens (20) includes a free portion facing the cache (24, 26).
  6. Optical module (10) according to either one of Claims 4 and 5, wherein the cache (24, 26) includes an extension (56) that at least partly covers the upper edge (28) of the lens (20).
  7. Optical module (10) according to any one of the preceding claims, wherein the cache (24, 26) is in one piece with the reflector (11, 12, 14, 16).
  8. Optical module (10) according to any one of the preceding claims, wherein the cache (24, 26) is adapted to absorb some of the rays received by the cache (24, 26).
  9. Optical module (10) according to any one of Claims 2 to 8, wherein the entry face (36) of the lens (20) has a raised area (44) contiguous with a lower edge (32) of the lens (20), the rear portion (50) of the cache (24, 26) being configured to reflect at least some of the directly received rays toward the raised area (44).
  10. Optical module (10) according to the preceding claim, wherein the cache (24, 26) is configured to reflect rays from the light source (18) so as to produce a beam portion for illuminating a gantry.
  11. Optical module (10) according to any one of the preceding claims, wherein the light source is an LED (18).
  12. Lighting device for motor vehicles, characterized in that it includes at least one optical module (10) according to any one of Claims 1 to 11.
EP13192926.7A 2012-11-16 2013-11-14 Optical module for headlamps for automotive vehicles Active EP2733413B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1260921A FR2998352B1 (en) 2012-11-16 2012-11-16 LIGHTING AND / OR SIGNALING DEVICES FOR A MOTOR VEHICLE

Publications (2)

Publication Number Publication Date
EP2733413A1 EP2733413A1 (en) 2014-05-21
EP2733413B1 true EP2733413B1 (en) 2018-03-14

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Application Number Title Priority Date Filing Date
EP13192926.7A Active EP2733413B1 (en) 2012-11-16 2013-11-14 Optical module for headlamps for automotive vehicles

Country Status (3)

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EP (1) EP2733413B1 (en)
CN (1) CN103822148B (en)
FR (1) FR2998352B1 (en)

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FR3087875B1 (en) * 2018-10-25 2021-07-30 Valeo Vision LIGHT MODULE FOR VEHICLE LIGHTING DEVICE
FR3137436A1 (en) * 2022-06-29 2024-01-05 Valeo Vision Light module for motor vehicle.

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Also Published As

Publication number Publication date
FR2998352A1 (en) 2014-05-23
CN103822148B (en) 2017-09-05
CN103822148A (en) 2014-05-28
FR2998352B1 (en) 2018-08-10
EP2733413A1 (en) 2014-05-21

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