EP2809985A1 - Device for making the appearance of a motor vehicle signal light uniform - Google Patents

Device for making the appearance of a motor vehicle signal light uniform

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Publication number
EP2809985A1
EP2809985A1 EP13705733.7A EP13705733A EP2809985A1 EP 2809985 A1 EP2809985 A1 EP 2809985A1 EP 13705733 A EP13705733 A EP 13705733A EP 2809985 A1 EP2809985 A1 EP 2809985A1
Authority
EP
European Patent Office
Prior art keywords
light
guide
translucent
screen
graining
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
EP13705733.7A
Other languages
German (de)
French (fr)
Other versions
EP2809985B1 (en
Inventor
Alain Buisson
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.)
Marelli Automotive Lighting France SAS
Original Assignee
Automotive Lighting Rear Lamps France 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
Family has litigation
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Application filed by Automotive Lighting Rear Lamps France SAS filed Critical Automotive Lighting Rear Lamps France SAS
Priority to PL13705733T priority Critical patent/PL2809985T3/en
Publication of EP2809985A1 publication Critical patent/EP2809985A1/en
Application granted granted Critical
Publication of EP2809985B1 publication Critical patent/EP2809985B1/en
Revoked legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/242—Light guides characterised by the emission area
    • F21S43/245—Light guides characterised by the emission area emitting light from one or more of its major surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/61—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using light guides
    • 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
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • 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
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/237—Light guides characterised by the shape of the light guide rod-shaped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to the field of lighting and signaling of vehicles, including motor vehicles. It relates more particularly to a device for vehicle traffic lights comprising a guide arranged to be able to guide and diffuse the light emitted by at least one LED, and in front of it an element of transparent material intended, in combination with said guide, to homogenize and / or adapt the light emitted by the device.
  • the regulations in force require, depending on the type of vehicle, different lighting or signaling lights. But, in addition to the volume of all fires, the performance and uniformity of illumination of individual fires thus grouped are major concerns.
  • transparent auxiliary screens in which can propagate the light emitted by an auxiliary light source, these screens being intended to equip a fire, including rear, a motor vehicle. Local discontinuities provided in the screen material are foci of light scattering out of these screens (see French Patent Publication No. 2,868,506).
  • flashing lights including front turn signals for motor vehicles, in which an auxiliary light source for position light illuminates an element arranged transversely in the space between the main light and the frontal ice, and provides through it an illumination in the same direction as that of the main light.
  • German Patent Application DE 103 11 317 discloses a vehicle lighting device comprising a light guide comprising diffusion structures located essentially at the focus of reflecting surfaces which thus allow to spread a homogeneous illumination.
  • a new device for motor vehicle fire comprising a transparent optical material and at least one LED-type light source arranged to emit light rays propagating. within the thickness of said transparent optical material, which essentially comprises:
  • Said plate comprising at least one bilateral elongated bulge of substantially circular overall cross-section having its mean longitudinal axis in the mean plane of said plate and capable of forming a light guide, and
  • At least one LED placed at at least one end of said light guide, with its main axis orthogonal to the longitudinal axis of said light guide.
  • the present invention relates to a device for lighting and / or signaling of a motor vehicle incorporating a guide, and as defined above and in the description which follows.
  • the present invention thus relates to a device for lighting and / or signaling of a motor vehicle, incorporating a guide and in which is combined with the aforesaid guide, and whatever the type of guide, a transparent element or screen or translucent, essentially consisting of an opaline material, provided with an internal and / or external graining and arranged between said guide and the visible face of the fire or of the set of fires concerned, so as to provide a luminous function of homogeneous color.
  • the front part forming a translucent screen provided with a graining thus provided is disposed downstream of the light guide associated with at least one LED, in the direction of diffusion of the light emitted by the LED or LEDs. It has the effect and / or for the purpose of standardizing the luminous rendering of said curtain and thus eliminating diffusion irregularities, and therefore the appearance that can present the lighting emanating from such light guides.
  • the invention thus relates to a light for a motor vehicle, of the type comprising a light diffusion guide emitted by at least one LED capable of illuminating perpendicular to at least one of the lateral faces of said guide, while the latter is complemented by a translucent material element arranged frontally between the face of the guide facing the front face of the projector concerned and the outside, substantially perpendicular to the main direction of the light beam.
  • This element is thus intended to cover at least partially the light-determining face of said light guides for LED lighting of motor vehicles.
  • the aforementioned translucent material element is a piece of opal or at least predominantly opaline, or a piece having substantially the optical characteristics of opaline or equivalent translucent material.
  • This piece may constitute an additional element of a traffic light device for vehicles. Alternatively, it may constitute the window of the optical housing comprising the other functional elements of such a traffic light for vehicles.
  • said graining may be provided on the outer face and / or on the internal face of such an element, or inside it. It is preferred to confer said graining on the internal face of the aforesaid element when it is integrated in a suitable housing. It will be shown later that said element thus grained is advantageously arranged in front of said guide, with a space between them.
  • graining is understood to mean the formation of discontinuities in and / or on the material concerned.
  • the grained material can then be made:
  • the material made opaline is in practice PMMA or poly (methyl methacrylate) to which are added, for example by injection, materials selected from microbeads of opalescent material and a dispersible material, especially for the injection and distribution of a gas, in particular C0 2 , to give a random character to the opalescence produced.
  • the opaline material may be left whitish or colored, especially to appear amber or super-light blue, by techniques known to those skilled in the art. It can thus make it possible to bring another effect to the on state in which the color of the light emitted by the LEDs can thus be different from the color in the off state.
  • the piece of opaline material has dimensions enabling it to conform to the dimensions of the aforementioned light guides.
  • the light guides used may have a length (straight or curvilinear) of about 200-300 mm when illuminated by an LED at one of their ends, and even up to about 600 mm. they have an LED at both ends. It might have seemed easier to attach the translucent element to the light guide. However, it has been found that, on the contrary, it is appropriate for a good distribution and proper preservation of the intensity of the transmitted light that a certain distance between the light guide and said translucent element is respected.
  • the piece of opaline material aforesaid is advantageously fixed at a distance from the light guide as described above. It is preferably placed, in front of this guide in the direction of the path of the scattered light, at a distance lying in practice between about 5 and 10 mm, more preferably between 6 and 9 mm, and more advantageously between 7 and About 8 mm. Fixing this element near the ends of the aforesaid guide or any other support that may be available nearby is easily performed by conventional means within the reach of the skilled person.
  • the guide of the lighting device according to the invention becomes comparable to a filament of a virtual light source.
  • the aforesaid translucent element cooperates with the other elements of the lighting device and provides an overall effect that can be adapted to suit particular by the choice of the geometry, the distance with the guide and / or translucency characteristics of said element.
  • the device according to the invention is primarily intended to equip lighting systems forming lantern, brake light, raised brake light, flashing and / or possibly daytime running light before motor vehicles.
  • the translucent element thus designed is in practice of crystal color or red color or other. It may comprise two parts, in total recovery or preferably partial with each other, and one of which is kept crystal-colored, while the other is red or other color.
  • FIG. 1 schematically represents a view from above of a rear light 1 of a motor vehicle not equipped with the grained opaline element according to the invention.
  • FIG. 2 represents a schematic front view of the device according to FIG. 1, but provided with the element 5 with graining 6 according to the invention.
  • FIG. 3 schematically represents a longitudinal sectional view along C-C of the device according to the invention, integrated in a set as schematized in FIG. 2.
  • FIG. 4 shows (FIGS. 4A, 4B, 4C) a partial schematic transverse section along A-A of a lighting device, comprising a piece of translucent material 5 provided with a graining 6 according to FIG. 2.
  • the device forming a rear light of a motor vehicle 1 thus combines with a guide 3, advantageously incorporated in a structure or a housing 4 and able to be illuminated by a light source 2, a translucent screen 5 provided with a graining 6.
  • An external, transparent screen may also be provided by the housing cover containing the lighting light device.
  • the invention thus preferably relates to a light for a motor vehicle, of the type comprising a guide 3 for diffusing the light emitted by at least one LED 2 illuminating perpendicular to at least one of the lateral faces of said guide 3, further comprising a screen 5 in translucent material provided with a graining 6, disposed frontally between the face of the guide 3 facing the front face of the projector concerned and the outside, substantially perpendicular to the main direction of the light beam.
  • the device advantageously has as its light source one or more LEDs 2 whose light beam is channeled by a guide 3 of the type mentioned above, and dispersed by this guide (provided with appropriate cavities / asperities, conventionally constituted by prismatic entities, designed or integrated by means and according to provisions known to those skilled in the art) in a curtain 4.
  • the device 1 according to the invention has been found to provide as a main positive effect the homogenization of the lighting provided by these elements, also well to the right of this set of elements that under an angle of vision shifted. The intensity of the light, thus better distributed and better distributed, has been maintained at a satisfactory level in view of the standards in force.
  • the profile of an average cross section of said translucent curtain piece may be any; it is preferably similar or equivalent to one of those illustrated by way of example in FIG. 4 (see 4A, 4B and 4C). It can thus, for example, and without being limiting, be a rounded bottom profile with a rounded bottom turned towards the bead forming a light guide 3, or a U-shaped profile whose width can vary between about 10 and 25 mm, or a bowl profile whose rounded bottom is surmounted by a cover plate 7 carrying the graining elements 6 able to give it an opalescence. As for the guide 3, it has on its rear part of the conventional prisms 8.
  • the device according to the invention comprises a part as described above, having an elongate shape having a length of approximately 210-310 or 610 mm, and a width of approximately 10-20 mm approximately preferably about 15 mm.
  • Such a U-profile piece about 15-25 mm wide is an appropriate means for imparting style or signature effects to the lighting device.
  • the opalescent part covering the light guides is made opalescent preferably on its outer faces, so that the incident rays are deflected by the elements. conferring opalescence and are thus diffused in a wider and more homogeneous spatial distribution.

Landscapes

  • 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)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Planar Illumination Modules (AREA)

Abstract

The invention relates to a device for a motor vehicle signal light (1), of the type having built-in light guides (3) and comprising at least one LED (2) as a light source. The device (1) comprises a part (5) made from translucent material, positioned in front of the guide (3) in the direction of travel of the diffused light and provided with graining to provide a light function of uniform colour.

Description

Dispositif pour rendre homogène l'aspect d'un feu de signalisation de véhicule automobile  Device for rendering the appearance of a traffic light of a motor vehicle homogeneous
La présente invention concerne le domaine de l'éclairage et de la signalisation des véhicules, notamment des véhicules automobiles. Elle concerne plus particulièrement un dispositif pour feu de signalisation de véhicules comprenant un guide agencé pour pouvoir guider et diffuser la lumière émise par au moins une LED, et en avant de celui-ci un élément en matériau transparent destiné, en combinaison avec ledit guide, à homogénéiser et/ou adapter la lumière émise par le dispositif. La réglementation en vigueur impose, selon les types de véhicules, différents feux d'éclairage ou de signalisation. Mais, outre le volume de l'ensemble des feux, les performances et l'uniformité d'éclairement des feux individuels ainsi regroupés sont des préoccupations majeures. On connaît déjà dans l'art antérieur des écrans auxiliaires transparents dans lesquels peut se propager la lumière émise par une source de lumière auxiliaire, ces écrans étant destinés à équiper un feu, notamment arrière, d'un véhicule automobile. Des discontinuités locales prévues dans le matériau de l'écran constituent des foyers de diffusion de la lumière hors de ces écrans (voir publication de brevet français No. 2 868 506). The present invention relates to the field of lighting and signaling of vehicles, including motor vehicles. It relates more particularly to a device for vehicle traffic lights comprising a guide arranged to be able to guide and diffuse the light emitted by at least one LED, and in front of it an element of transparent material intended, in combination with said guide, to homogenize and / or adapt the light emitted by the device. The regulations in force require, depending on the type of vehicle, different lighting or signaling lights. But, in addition to the volume of all fires, the performance and uniformity of illumination of individual fires thus grouped are major concerns. Already known in the prior art transparent auxiliary screens in which can propagate the light emitted by an auxiliary light source, these screens being intended to equip a fire, including rear, a motor vehicle. Local discontinuities provided in the screen material are foci of light scattering out of these screens (see French Patent Publication No. 2,868,506).
Dans la demande de brevet allemand DE 101 01 795 sont décrits des feux clignotants, notamment des clignotants avant pour véhicules automobiles, dans lesquels une source de lumière auxiliaire pour feu de position illumine un élément disposé transversalement dans l'espace entre le feu principal et la glace frontale, et procure à travers celle-ci un éclairement de même direction que celle du feu principal. In the German patent application DE 101 01 795 are described flashing lights, including front turn signals for motor vehicles, in which an auxiliary light source for position light illuminates an element arranged transversely in the space between the main light and the frontal ice, and provides through it an illumination in the same direction as that of the main light.
Dans la demande de brevet français 01 00048, publiée sous le numéro 2 819 040, est décrit un composant d'optique ou de style pour l'éclairage ou la signalisation de véhicules automobiles. Ce composant est en matériau transparent, à l'intérieur duquel des foyers de diffusion de la lumière sont situés uniquement en des endroits prédéterminés pour diffuser la lumière émise par une source associée au dispositif d'éclairage ou de signalisation concerné. Ce composant peut constituer la glace d'un projecteur de véhicule automobile, ou un insert placé dans un tel projecteur. Dans la demande de brevet allemand DE 103 11 317 est décrit un dispositif d'éclairage pour véhicule comportant un guide de lumière comprenant des structures de diffusion situées essentiellement au foyer de surfaces réfléchissantes qui laissent ainsi diffuser un éclairement homogène. In the French patent application 01 00048, published under the number 2 819 040, is described an optical component or style for lighting or signaling of motor vehicles. This component is made of transparent material, inside which foci of light scattering are located only in predetermined locations to diffuse the light emitted by a source associated with the lighting or signaling device concerned. This component can be the mirror of a motor vehicle headlamp, or an insert placed in such a projector. German Patent Application DE 103 11 317 discloses a vehicle lighting device comprising a light guide comprising diffusion structures located essentially at the focus of reflecting surfaces which thus allow to spread a homogeneous illumination.
La demanderesse a également conçu, et a décrit dans le document FR 2 953 781 Al, un nouveau dispositif pour feu de véhicule automobile, comportant un matériau optique transparent et au moins une source de lumière de type LED agencée pour émettre des rayons lumineux se propageant à l'intérieur de l'épaisseur dudit matériau optique transparent, qui comprend essentiellement: The Applicant has also conceived, and described in document FR 2 953 781 A1, a new device for motor vehicle fire, comprising a transparent optical material and at least one LED-type light source arranged to emit light rays propagating. within the thickness of said transparent optical material, which essentially comprises:
• une plaque d'un matériau optique transparent formant rideau,  A plate of a transparent optical material forming a curtain,
• ladite plaque comportant au moins un renflement allongé bilatéral, de section droite globale substantiellement circulaire, ayant son axe longitudinal moyen dans le plan moyen de ladite plaque et apte à former un guide de lumière, et  Said plate comprising at least one bilateral elongated bulge of substantially circular overall cross-section having its mean longitudinal axis in the mean plane of said plate and capable of forming a light guide, and
· au moins une LED placée à au moins l'une des extrémités dudit guide de lumière, avec son axe principal orthogonal à l'axe longitudinal dudit guide de lumière. At least one LED placed at at least one end of said light guide, with its main axis orthogonal to the longitudinal axis of said light guide.
Dans ces diverses applications et ces divers modes de réalisation d'écrans lumineux diffusant la lumière émise par au moins une LED, il peut apparaître des inhomogénéités dans la lumière diffusée, en particulier au niveau des guides, y compris ceux dont peuvent être munis des rideaux ou écrans diffuseurs. In these various applications and these various embodiments of light screens diffusing the light emitted by at least one LED, it can appear inhomogeneities in the scattered light, particularly at the level of the guides, including those which can be provided with curtains or broadcast screens.
Il est donc apparu utile de chercher à uniformiser le rendu lumineux de tels feux comportant un guide de lumière, ou à en masquer les éventuelles inhomogénéités. It has therefore appeared useful to seek to standardize the light rendering of such lights with a light guide, or to hide any inhomogeneities.
La présente invention a pour objet un dispositif pour feu d'éclairage et/ou de signalisation de véhicule automobile incorporant un guide, et tel que défini ci-dessus et dans la description qui suit. La présente invention concerne ainsi un dispositif pour feu d'éclairage et/ou de signalisation de véhicule automobile, incorporant un guide et dans lequel on combine avec le guide susdit, et quel que soit le type de guide, un élément ou écran transparent ou translucide, essentiellement constitué d'une matière de type opalin, muni d'un grainage interne et/ou externe et disposé entre ledit guide et la face visible du feu ou de l'ensemble de feux concerné, de manière à procurer une fonction lumineuse de couleur homogène. La pièce frontale formant écran translucide munie d'un grainage ainsi prévue est disposée en aval du guide de lumière associé à au moins une LED, dans le sens de diffusion de la lumière émise par la ou les LED. Elle a pour effet et/ou pour finalité d'uniformiser le rendu lumineux dudit rideau et de supprimer ainsi les irrégularités de diffusion, donc l'aspect que peuvent présenter les éclairages émanant de tels guides de lumière. The present invention relates to a device for lighting and / or signaling of a motor vehicle incorporating a guide, and as defined above and in the description which follows. The present invention thus relates to a device for lighting and / or signaling of a motor vehicle, incorporating a guide and in which is combined with the aforesaid guide, and whatever the type of guide, a transparent element or screen or translucent, essentially consisting of an opaline material, provided with an internal and / or external graining and arranged between said guide and the visible face of the fire or of the set of fires concerned, so as to provide a luminous function of homogeneous color. The front part forming a translucent screen provided with a graining thus provided is disposed downstream of the light guide associated with at least one LED, in the direction of diffusion of the light emitted by the LED or LEDs. It has the effect and / or for the purpose of standardizing the luminous rendering of said curtain and thus eliminating diffusion irregularities, and therefore the appearance that can present the lighting emanating from such light guides.
L'invention a ainsi pour objet un feu pour véhicule automobile, du type comportant un guide de diffusion de la lumière émise par au moins une LED apte à éclairer perpendiculairement à au moins l'une des faces latérales dudit guide, tandis que ce dernier est complété par un élément en matière translucide, disposé frontalement entre la face du guide tournée vers la face frontale du projecteur concerné et l'extérieur, sensiblement perpendiculairement à la direction principale du faisceau lumineux. Cet élément est ainsi destiné à recouvrir au moins partiellement la face déterminant l'éclairage des dits guides de lumière pour l'éclairage par LED de véhicules automobiles. Dans une forme de réalisation préférée, l'élément de matière translucide susdit est une pièce en opalin ou au moins majoritairement en opalin, ou encore une pièce ayant sensiblement les caractéristiques optiques de l'opaline ou d'un matériau translucide équivalent. Cette pièce peut constituer un élément additionnel d'un dispositif de feu de signalisation pour véhicules. En variante, elle peut constituer la vitre du boîtier optique comportant les autres éléments fonctionnels d'un tel feu de signalisation pour véhicules. The invention thus relates to a light for a motor vehicle, of the type comprising a light diffusion guide emitted by at least one LED capable of illuminating perpendicular to at least one of the lateral faces of said guide, while the latter is complemented by a translucent material element arranged frontally between the face of the guide facing the front face of the projector concerned and the outside, substantially perpendicular to the main direction of the light beam. This element is thus intended to cover at least partially the light-determining face of said light guides for LED lighting of motor vehicles. In a preferred embodiment, the aforementioned translucent material element is a piece of opal or at least predominantly opaline, or a piece having substantially the optical characteristics of opaline or equivalent translucent material. This piece may constitute an additional element of a traffic light device for vehicles. Alternatively, it may constitute the window of the optical housing comprising the other functional elements of such a traffic light for vehicles.
Dans tous les cas, ledit grainage peut être prévu sur la face externe et/ou sur la face interne d'un tel élément, ou encore à l'intérieur de celui-ci. On préfère conférer ledit grainage à la face interne de l'élément susdit lorsqu'il est intégré dans un boîtier approprié. On montrera plus loin que ledit élément ainsi grainé est avantageusement disposé à l'avant du guide susdit, avec un espace entre eux. In all cases, said graining may be provided on the outer face and / or on the internal face of such an element, or inside it. It is preferred to confer said graining on the internal face of the aforesaid element when it is integrated in a suitable housing. It will be shown later that said element thus grained is advantageously arranged in front of said guide, with a space between them.
Dans la présente description, on entend par grainage la formation de discontinuités dans et/ou sur le matériau concerné. Classiquement, le matériau grainé peut alors être réalisé:In the present description, graining is understood to mean the formation of discontinuities in and / or on the material concerned. Classically, the grained material can then be made:
• sans adjonction ni retrait de matière, par traitement approprié de tout ou partie de la paroi intérieure du moule de confection de l'élément à grainer, et/ou • without adding or removing material, by appropriate treatment of all or part of the inner wall of the mold for making the element to be grained, and / or
• par addition de matière réactive apte à générer des inclusions dans la matière servant à élaborer l'écran opalin grainé, dans les conditions de préparation de celui-ci, dans les deux cas selon des techniques connues de l'homme du métier, qui sait adapter aux besoins la rugosité conférée à l'élément ajouté au guide.  By addition of reactive material capable of generating inclusions in the material used to produce the grained opaline screen, under the conditions of preparation thereof, in both cases according to techniques known to those skilled in the art, who knows to adapt to the roughness conferred on the element added to the guide.
Le matériau rendu opalin est en pratique du PMMA ou poly(méthacrylate de méthyle) auquel sont additionnées, par exemple par injection, des matières choisies parmi des microbilles de matériau à effet opalescent et une matière dispersable, notamment pour l'injection et la distribution d'un gaz, notamment C02, pour conférer un caractère aléatoire à l'opalescence produite. The material made opaline is in practice PMMA or poly (methyl methacrylate) to which are added, for example by injection, materials selected from microbeads of opalescent material and a dispersible material, especially for the injection and distribution of a gas, in particular C0 2 , to give a random character to the opalescence produced.
Le matériau opalin peut être laissé blanchâtre ou être coloré, notamment pour apparaître de couleur ambre ou bleu super-léger, par des techniques connues de l'homme du métier. Il peut ainsi permettre d'apporter un autre effet à l'état allumé dans lequel la couleur de la lumière émise par les LED peut ainsi être différente de la couleur à l'état éteint. The opaline material may be left whitish or colored, especially to appear amber or super-light blue, by techniques known to those skilled in the art. It can thus make it possible to bring another effect to the on state in which the color of the light emitted by the LEDs can thus be different from the color in the off state.
La pièce de matériau opalin présente des dimensions lui permettant de se conformer aux dimensions des guides de lumière susdits. The piece of opaline material has dimensions enabling it to conform to the dimensions of the aforementioned light guides.
En pratique, les guides de lumière utilisés peuvent avoir une longueur (droite ou curviligne) d'environ 200-300 mm lorsqu'ils sont éclairés par une LED à l'une de leurs extrémités, et même jusqu'à environ 600 mm s'ils disposent d'une LED à chacune de leurs deux extrémités. Il aurait pu paraître plus simple d'accoler ledit élément translucide au guide de lumière. Or, il s'est avéré que, au contraire, il convient pour une bonne répartition et une préservation correcte de l'intensité de la lumière transmise qu'une certaine distance entre le guide de lumière et ledit élément translucide soit respectée. In practice, the light guides used may have a length (straight or curvilinear) of about 200-300 mm when illuminated by an LED at one of their ends, and even up to about 600 mm. they have an LED at both ends. It might have seemed easier to attach the translucent element to the light guide. However, it has been found that, on the contrary, it is appropriate for a good distribution and proper preservation of the intensity of the transmitted light that a certain distance between the light guide and said translucent element is respected.
En pratique, la pièce de matériau opalin susdite est avantageusement fixée à distance du guide de lumière tel que décrit plus haut. Elle est de préférence placée, en avant de ce guide dans le sens du trajet de la lumière diffusée, à une distance se situant dans la pratique entre 5 et 10 mm environ, plus préférablement entre 6 et 9 mm, et plus avantageusement entre 7 et 8 mm environ. La fixation de cet élément à proximité des extrémités du guide susdit ou à tout autre support pouvant être disponible à proximité s'effectue sans difficulté par des moyens classiques, à la portée de l'homme du métier. In practice, the piece of opaline material aforesaid is advantageously fixed at a distance from the light guide as described above. It is preferably placed, in front of this guide in the direction of the path of the scattered light, at a distance lying in practice between about 5 and 10 mm, more preferably between 6 and 9 mm, and more advantageously between 7 and About 8 mm. Fixing this element near the ends of the aforesaid guide or any other support that may be available nearby is easily performed by conventional means within the reach of the skilled person.
Dans la mise en œuvre de la présente invention, on dispose en outre d'une grande liberté de forme pour satisfaire la fonction design recherchée. In the implementation of the present invention, there is also a great freedom of form to satisfy the desired design function.
Il faut également noter que, dans une telle configuration, le guide du dispositif d'éclairage selon l'invention devient assimilable à un filament d'une source lumineuse virtuelle. L'élément translucide susdit coopère avec les autres éléments du dispositif d'éclairage et procure un effet d'ensemble qui peut être adapté à convenance notamment par le choix de la géométrie, de la distance avec le guide et/ou des caractéristiques de translucidité dudit élément. Le dispositif selon l'invention est principalement destiné à équiper des systèmes d'éclairage formant lanterne, feu de stop, feu de stop surélevé, clignotant et/ou éventuellement feu diurne avant de véhicules automobiles. It should also be noted that, in such a configuration, the guide of the lighting device according to the invention becomes comparable to a filament of a virtual light source. The aforesaid translucent element cooperates with the other elements of the lighting device and provides an overall effect that can be adapted to suit particular by the choice of the geometry, the distance with the guide and / or translucency characteristics of said element. The device according to the invention is primarily intended to equip lighting systems forming lantern, brake light, raised brake light, flashing and / or possibly daytime running light before motor vehicles.
Selon les cas, l'élément translucide ainsi conçu est en pratique de couleur cristal ou de couleur rouge ou autre. Il peut comporter deux parties, en recouvrement total ou de préférence partiel l'une avec l'autre, et dont l'une est maintenue de couleur cristal, tandis que l'autre est de couleur rouge ou autre. L'invention sera mieux comprise, et d'autres objectifs, avantages et caractéristiques de celle-ci apparaîtront plus clairement, à la lumière de la description détaillée ci-après de modes de réalisation de l'invention. Ces modes de réalisation sont fournis à titre purement illustratif et non-limitatif, tandis que sont annexées à ladite description des planches de dessins dans lesquelles: Depending on the case, the translucent element thus designed is in practice of crystal color or red color or other. It may comprise two parts, in total recovery or preferably partial with each other, and one of which is kept crystal-colored, while the other is red or other color. The invention will be better understood, and other objects, advantages and features thereof will become more apparent in light of the following detailed description of embodiments of the invention. These embodiments are provided for purely illustrative and non-limiting purposes, while are appended to said description drawing boards in which:
La figure 1 représente schématiquement une vue de dessus d'un feu arrière 1 de véhicule automobile non équipé de l'élément opalin grainé selon l'invention.  FIG. 1 schematically represents a view from above of a rear light 1 of a motor vehicle not equipped with the grained opaline element according to the invention.
La figure 2 représente une vue schématique de face du dispositif selon la Fig. 1, mais muni de l'élément 5 avec grainage 6 selon l'invention.  FIG. 2 represents a schematic front view of the device according to FIG. 1, but provided with the element 5 with graining 6 according to the invention.
La figure 3 représente schématiquement une vue en coupe longitudinale selon C-C du dispositif selon l'invention, intégré dans un ensemble comme schématisé dans la Fig. 2.  3 schematically represents a longitudinal sectional view along C-C of the device according to the invention, integrated in a set as schematized in FIG. 2.
La figure 4 représente (Figs. 4A, 4B, 4C) une coupe transversale schématique partielle selon A-A d'un dispositif d'éclairage, comportant une pièce de matière translucide 5 munie d'un grainage 6 selon la Fig. 2.  FIG. 4 shows (FIGS. 4A, 4B, 4C) a partial schematic transverse section along A-A of a lighting device, comprising a piece of translucent material 5 provided with a graining 6 according to FIG. 2.
Dans la forme de réalisation représentée sur les figures annexées, le dispositif formant feu arrière de véhicule automobile 1 selon l'invention combine ainsi avec un guide 3, avantageusement incorporé dans une structure ou un boîtier 4 et apte à être éclairé par une source de lumière 2, un écran translucide 5 muni d'un grainage 6. In the embodiment shown in the accompanying figures, the device forming a rear light of a motor vehicle 1 according to the invention thus combines with a guide 3, advantageously incorporated in a structure or a housing 4 and able to be illuminated by a light source 2, a translucent screen 5 provided with a graining 6.
Un écran externe, transparent peut en outre être apporté par le couvercle du boîtier contenant le dispositif de feu d'éclairage. L'invention concerne ainsi préférentiellement un feu pour véhicule automobile, du type comportant un guide 3 pour la diffusion de la lumière émise par au moins une LED 2 éclairant perpendiculairement à au moins l'une des faces latérales dudit guide 3, comportant en outre un écran 5 en matière translucide munie d'un grainage 6, disposé frontalement entre la face du guide 3 tournée vers la face frontale du projecteur concerné et l'extérieur, sensiblement perpendiculairement à la direction principale du faisceau lumineux. Le dispositif présente avantageusement pour source lumineuse une ou plusieurs LED 2 dont le faisceau lumineux est canalisé par un guide 3 du type évoqué plus haut, et dispersé par ce guide (muni de cavités/aspérités appropriées, classiquement constituées par des entités prismatiques, conçues ou intégrées par des moyens et selon des dispositions connus de l'homme du métier) dans un rideau 4. Le dispositif 1 selon l'invention s'est avéré procurer comme principal effet positif l'homogénéisation de l'éclairage procuré par ces éléments, aussi bien au droit de cet ensemble d'éléments que sous un angle de vision décalé. L'intensité de la lumière ainsi mieux diffusée et mieux répartie a été maintenue à un niveau satisfaisant compte tenu des normes en vigueur. An external, transparent screen may also be provided by the housing cover containing the lighting light device. The invention thus preferably relates to a light for a motor vehicle, of the type comprising a guide 3 for diffusing the light emitted by at least one LED 2 illuminating perpendicular to at least one of the lateral faces of said guide 3, further comprising a screen 5 in translucent material provided with a graining 6, disposed frontally between the face of the guide 3 facing the front face of the projector concerned and the outside, substantially perpendicular to the main direction of the light beam. The device advantageously has as its light source one or more LEDs 2 whose light beam is channeled by a guide 3 of the type mentioned above, and dispersed by this guide (provided with appropriate cavities / asperities, conventionally constituted by prismatic entities, designed or integrated by means and according to provisions known to those skilled in the art) in a curtain 4. The device 1 according to the invention has been found to provide as a main positive effect the homogenization of the lighting provided by these elements, also well to the right of this set of elements that under an angle of vision shifted. The intensity of the light, thus better distributed and better distributed, has been maintained at a satisfactory level in view of the standards in force.
Le profil d'une section transversale moyenne de ladite pièce formant rideau translucide peut être quelconque; il est de préférence semblable ou équivalent à l'un de ceux illustrés à titre d'exemples dans la Fig. 4 (voir 4A, 4B et 4C). Il peut ainsi, par exemple, et sans que cela soit limitatif, être un profil en cuvette à fond intérieur arrondi tourné vers le bourrelet formant guide de lumière 3, ou un profil en U dont la largeur peut varier ente 10 et 25 mm environ, ou encore un profil en cuvette dont le fond arrondi est surmonté d'une plaque de couverture 7 portant les éléments de grainage 6 aptes à lui conférer une opalescence. Quant au guide 3, il comporte sur sa partie arrière des prismes classiques 8. The profile of an average cross section of said translucent curtain piece may be any; it is preferably similar or equivalent to one of those illustrated by way of example in FIG. 4 (see 4A, 4B and 4C). It can thus, for example, and without being limiting, be a rounded bottom profile with a rounded bottom turned towards the bead forming a light guide 3, or a U-shaped profile whose width can vary between about 10 and 25 mm, or a bowl profile whose rounded bottom is surmounted by a cover plate 7 carrying the graining elements 6 able to give it an opalescence. As for the guide 3, it has on its rear part of the conventional prisms 8.
Selon un mode de réalisation, le dispositif selon l'invention comprend une pièce telle que décrite ci-dessus, ayant une forme allongée présentant une longueur d'environ 210-310 ou 610 mm, et une largeur d'environ 10-20 mm environ, de préférence d'environ 15 mm environ. According to one embodiment, the device according to the invention comprises a part as described above, having an elongate shape having a length of approximately 210-310 or 610 mm, and a width of approximately 10-20 mm approximately preferably about 15 mm.
Une telle pièce à profil en U d'environ 15-25 mm de largeur constitue un moyen approprié pour conférer des effets de style ou de signature au dispositif d'éclairage. Dans les cas ainsi présentés comme exemples illustratifs, ainsi que dans d'autres, la pièce opalescente recouvrant les guides de lumière est rendue opalescente de préférence sur ses faces externes, de telle manière que les rayons incidents sont déviés par les éléments conférant l'opalescence et sont ainsi diffusés selon une répartition spatiale plus large et plus homogène. Such a U-profile piece about 15-25 mm wide is an appropriate means for imparting style or signature effects to the lighting device. In the cases thus presented as illustrative examples, as in others, the opalescent part covering the light guides is made opalescent preferably on its outer faces, so that the incident rays are deflected by the elements. conferring opalescence and are thus diffused in a wider and more homogeneous spatial distribution.

Claims

REVENDICATIONS
1. Dispositif pour feu d'éclairage et/ou de signalisation de véhicule automobile, incorporant un guide de lumière (3), dans lequel on combine avec ledit guide (3) un écran translucide (5), ledit écran translucide étant muni d'un grainage (6) et disposé entre ledit guide et la face visible du feu ou de l'ensemble de feux concerné, de manière à procurer une fonction lumineuse de couleur homogène. 1. Device for lighting and / or signaling light of a motor vehicle, incorporating a light guide (3), in which is combined with said guide (3) a translucent screen (5), said translucent screen being provided with a graining (6) and disposed between said guide and the visible face of the fire or the set of lights concerned, so as to provide a homogeneous color light function.
2. Dispositif selon la revendication 1, dans lequel l'écran translucide (5) est muni d'un grainage (6) sur l'une ou l'autre ou les deux de ses faces principales aptes à être traversées par la lumière émise par une ou plusieurs LED (2). 2. Device according to claim 1, wherein the translucent screen (5) is provided with a graining (6) on one or the other or both of its main faces adapted to be traversed by the light emitted by one or more LEDs (2).
3. Dispositif selon l'une des revendications 1 ou 2, dans lequel ledit écran de matière translucide (5) est une pièce en opalin ou majoritairement en opalin, ou encore une pièce ayant sensiblement les caractéristiques optiques de l'opaline ou d'un matériau translucide équivalent. 3. Device according to one of claims 1 or 2, wherein said screen of translucent material (5) is a piece of opal or mostly opaline, or a piece having substantially the optical characteristics of opaline or a equivalent translucent material.
4. Dispositif selon l'une quelconque des revendications 1 à 3, dans lequel le grainage (6) de l'écran translucide (5) est interne et/ou externe à la matière dudit écran translucide. 4. Device according to any one of claims 1 to 3, wherein the graining (6) of the translucent screen (5) is internal and / or external to the material of said translucent screen.
5. Dispositif selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'écran translucide (5) est composé de polyméthacrylate de méthyle auquel sont additionnées, par exemple par injection, des matières choisies parmi des microbilles de matériau à effet opalescent et une matière dispersable, notamment pour l'injection et la distribution d'un gaz, notamment C02, pour conférer un caractère aléatoire à l'opalescence produite. 5. Device according to any one of claims 1 to 4, characterized in that the translucent screen (5) is composed of polymethyl methacrylate which are added, for example by injection, materials selected from microbeads of effect material opalescent material and a dispersible material, especially for the injection and distribution of a gas, in particular C0 2 , to give a random character to the opalescence produced.
6. Dispositif selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le matériau translucide (5) de type opalin est laissé blanchâtre. 6. Device according to any one of claims 1 to 5, characterized in that the translucent material (5) of the opal type is left whitish.
7. Dispositif selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le matériau translucide (5) est coloré, notamment pour apparaître de couleur ambre ou bleu super-léger, et permet d'apporter un autre effet à l'état allumé dans lequel la couleur de la lumière émise par les LED peut ainsi être différente de la couleur de l'état éteint. 7. Device according to any one of claims 1 to 5, characterized in that the translucent material (5) is colored, especially to appear amber or blue super-light, and makes it possible to bring another effect to the lit state in which the color of the light emitted by the LEDs can thus be different from the color of the off state.
8. Dispositif selon l'une quelconque des revendications 1 à 7, caractérisé en ce que la pièce de matériau translucide (5) est fixée sensiblement contre ledit guide (3). 8. Device according to any one of claims 1 to 7, characterized in that the piece of translucent material (5) is fixed substantially against said guide (3).
9. Dispositif selon l'une quelconque des revendications 1 à 7, caractérisé en ce que la pièce de matériau translucide (5) est placée en avant dudit guide (3), avantageusement à une distance d'environ 5 à 10 mm dudit guide. 9. Device according to any one of claims 1 to 7, characterized in that the piece of translucent material (5) is placed in front of said guide (3), preferably at a distance of about 5 to 10 mm from said guide.
10. Dispositif selon l'une quelconque des revendications 1 à 9, caractérisé en ce que l'écran translucide (5) présente un profil en cuvette à fond intérieur arrondi tourné vers le bourrelet formant guide de lumière du guide (3), ou un profil en cuvette dont le fond arrondi est surmonté d'une plaque de couverture (7) portant les éléments de grainage (6) aptes à lui conférer une opalescence, ou encore un profil en U d'une largeur pouvant varier entre 15 et 25 mm environ. 10. Device according to any one of claims 1 to 9, characterized in that the translucent screen (5) has a cupped profile with a rounded inner bottom turned towards the bead forming a light guide guide (3), or a bowl profile whose rounded bottom is surmounted by a cover plate (7) carrying the graining elements (6) able to give it an opalescence, or a U-shaped profile with a width that can vary between 15 and 25 mm about.
11. Dispositif selon l'une quelconque des revendications 1 à 10, caractérisé en ce qu'il équipe des systèmes d'éclairage formant lanterne, feu de stop, feu de stop surélevé, clignotant et/ou éventuellement feu diurne avant de véhicules automobiles. 11. Device according to any one of claims 1 to 10, characterized in that it equips lighting systems forming lantern, brake light, raised brake light, flashing and / or possibly daytime running light before motor vehicles.
12. Feu pour véhicule automobile, du type comportant un guide (3) pour la diffusion de la lumière émise par au moins une LED (2) éclairant perpendiculairement à au moins l'une des faces latérales dudit guide (3), caractérisé en ce qu'il comporte en outre un écran (5) en matière translucide munie d'un grainage (6), disposé frontalement entre la face du guide (3) tournée vers la face frontale du projecteur concerné et l'extérieur, sensiblement perpendiculairement à la direction principale du faisceau lumineux. 12. Fire for a motor vehicle, of the type comprising a guide (3) for diffusing the light emitted by at least one LED (2) illuminating perpendicular to at least one of the lateral faces of said guide (3), characterized in that it further comprises a screen (5) of translucent material provided with a graining (6), arranged frontally between the face of the guide (3) facing the front face of the projector concerned and the outside, substantially perpendicular to the main direction of the light beam.
EP13705733.7A 2012-01-30 2013-01-30 Device for making the appearance of a motor vehicle signal light uniform Revoked EP2809985B1 (en)

Priority Applications (1)

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FR1200270A FR2986305B1 (en) 2012-01-30 2012-01-30 DEVICE FOR MAKING HOMOGENEOUS THE APPEARANCE OF A MOTOR VEHICLE SIGNALING FIRE
PCT/EP2013/051737 WO2013113726A1 (en) 2012-01-30 2013-01-30 Device for making the appearance of a motor vehicle signal light uniform

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JP (1) JP2015505637A (en)
CN (1) CN104379990A (en)
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FR (1) FR2986305B1 (en)
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EP2809985B1 (en) 2020-07-15
CN104379990A (en) 2015-02-25
WO2013113726A1 (en) 2013-08-08
US20140376247A1 (en) 2014-12-25
FR2986305B1 (en) 2014-11-21
FR2986305A1 (en) 2013-08-02
PL2809985T3 (en) 2021-01-11
ES2823763T3 (en) 2021-05-10

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