EP2442016A2 - Glass of a lighting and/or signalling device with variable light-transmission coefficient - Google Patents

Glass of a lighting and/or signalling device with variable light-transmission coefficient Download PDF

Info

Publication number
EP2442016A2
EP2442016A2 EP11184082A EP11184082A EP2442016A2 EP 2442016 A2 EP2442016 A2 EP 2442016A2 EP 11184082 A EP11184082 A EP 11184082A EP 11184082 A EP11184082 A EP 11184082A EP 2442016 A2 EP2442016 A2 EP 2442016A2
Authority
EP
European Patent Office
Prior art keywords
zone
transmission coefficient
face
source
light transmission
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.)
Withdrawn
Application number
EP11184082A
Other languages
German (de)
French (fr)
Other versions
EP2442016A3 (en
Inventor
Pierre Albou
Jean-Claude Puente
Damien Chardaire
Olivier Ruat
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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP2442016A2 publication Critical patent/EP2442016A2/en
Publication of EP2442016A3 publication Critical patent/EP2442016A3/en
Withdrawn legal-status Critical Current

Links

Images

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
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/28—Cover glass
    • 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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/63—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates
    • F21S41/64—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by changing their light transmissivity, e.g. by liquid crystal or electrochromic devices
    • F21S41/645—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by changing their light transmissivity, e.g. by liquid crystal or electrochromic devices by electro-optic means, e.g. liquid crystal or electrochromic devices
    • 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
    • F21S43/255—Filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/003—Controlling the distribution of the light emitted by adjustment of elements by interposition of elements with electrically controlled variable light transmissivity, e.g. liquid crystal elements or electrochromic devices

Definitions

  • the technical sector of the present invention is that of lighting and / or signaling devices for a motor vehicle, and more particularly the windows fitted to such devices.
  • a projector mounted on a motor vehicle is conventionally composed of a housing closed by an ice thus delimiting an internal volume in which there is a bulb, a reflector and electric cables.
  • the mechanical part of these components is apparent through the ice and it is then necessary to hide this mechanical part.
  • the difference in temperature between the air outside the projector and the air present in the internal volume causes condensation on the ice water in the air because the latter is likely to cool very brutally.
  • the projectors are then provided with a moisture-proof varnish or a system of ventilation of the internal volume of the projector but the effectiveness of these solutions leaves something to be desired.
  • the application of an anti-moisture varnish involves an additional cost and complicates the manufacturing process of such a projector and the ventilation system complicates the development, manufacture and installation of the projector.
  • the object of the present invention is therefore to solve the disadvantages described above mainly by installing on a mirror of a motor vehicle headlight a system whose transparency is electrically controlled.
  • the subject of the invention is therefore a part of a lighting and / or signaling device for a motor vehicle, this part being arranged to be visible from the outside of the device when this part is mounted on this device, characterized in that it comprises a first zone having a variable light transmission coefficient.
  • variable is meant the fact that the first zone can take at least two states in which the perception of the light beam is significantly different.
  • the variability is of the all-or-nothing type, that is to say a first case in which the light beam passes through the first zone without alteration and a second case in which the light beam does not cross the first zone. .
  • the first zone is opaque or reflective.
  • the light beam does not cross the first zone but the invention covers the case where the outer rays are absorbed (opacity) as well as the case where the outer rays are returned or reflected, the latter case avoiding a heating of the room.
  • the variability considered here is activated or deactivated electrically. The piece is visible when it is installed on the device in that it is apparent on examination of the device from outside the device. These include an ice, an intermediate screen or an internal component to the device.
  • the part is delimited by an inner face and an outer face and wherein the first zone covers the entirety of at least one of said faces.
  • the region with a variable light transmission coefficient is thus formed by one of the two faces constituting the part, these faces being the parts of the part which extend in a concurrent and distinct plane with respect to the light source.
  • the part is delimited by the internal face and the external face and the first zone partially covers at least one of said faces so as to delimit a second zone distinct from the first zone, the second zone having a invariable light transmission coefficient.
  • the area with variable light transmission coefficient does not occupy the entire face, the remaining part being formed by the part through which the light beam is not altered by a controllable device.
  • part of the room and more specifically the second zone is substantially at the right of the light source while the first zone may be adjacent to the second zone is thus make invisible to the user some mechanical parts of the projector equipped with such a room.
  • the first zone covers between 10% and 90% of the face concerned. This slice of value guarantees a good level of opacity or reflection while leaving the second zone of the room transparent.
  • the first zone covers at least 30% of the face concerned.
  • the first zone covers a periphery of the face in question.
  • This periphery takes the form of one or more continuous or interrupted bands around the second zone whose luminous transmittance is invariable.
  • the first zone covers the inner face of the piece.
  • the inner face of the part in particular the ice, is the face turned towards the housing of the lighting device. It is thus understood that the first zone is installed on the part but inside the projector so as to protect the device implementing the variability of external aggression.
  • the variability of the light transmission coefficient of the first zone is operated by an electrochromic device, this term encompassing in particular in the description below an electronic ink comprising suspended particles (of the English “Suspended particles device ").
  • This electrochromic device behaves like a capacitor controlled by an electronic control device whose function is to apply to the electrochromic device an electric charge.
  • This electrochromic device takes the form of a solid layer having a thickness of between 500 nm and 10 ⁇ m of the face in question, advantageously 1 ⁇ m.
  • solidarity for example means a bonding of the layer on the inner face or on the outer face.
  • molecular adhesion is also understood to mean vacuum deposition, but any other means for connecting this layer to this face enters the field of the integral word.
  • This layer comprises for example tungsten oxide particles in suspension, the position in the layer is reversible when an electric charge is applied thereto.
  • the invention finds particular application when the part is a transparent or translucent element constituting the lighting and / or signaling device.
  • These include the ice which defines an internal volume of the device relative to the outside of the latter.
  • the invention also finds an interesting application when the part is an intermediate screen, for example installed in the internal volume of the device.
  • the invention also covers a lighting and / or signaling device comprising a first source emitting a light beam installed in an internal volume delimited by a housing and a room according to any one of the characteristics mentioned above.
  • the light beam crosses the first zone. It is thus possible to make the beam visible by driving the first zone.
  • the light beam crosses a second zone distinct from the first zone, the second zone having an invariable light transmission coefficient. This reduces the area covered by the first zone to the bare minimum necessary to hide the condensation or mechanisms of the internal components of the projector.
  • the lighting and / or signaling device comprises a second source emitting a light beam, said first zone being installed in line with the light beam emitted by the second source.
  • This second light source can be a town lamp, a flashing light or a dedicated daylight.
  • the first controllable area can make apparent an additional function embedded in the lighting device without rendering transparent the rest of the room.
  • the variability of the light transmission coefficient of the first zone is operated by an electrochromic device whose opacity or reflection is activated when the first light source is extinguished.
  • the activation that is to say the opaque or reflective, or the deactivation, that is to say the transparent nature of the area, are placed under the control of the ignition of the first light source.
  • the first area becomes transparent so as not to hinder the passage of the light beam.
  • the first zone has a variable light transmission coefficient so as to become, in a predetermined manner, transparent or reflective.
  • the variability of the light transmission coefficient of this first zone is operated by an electronic ink comprising suspended particles (of the English "Suspended particles device” or SPD).
  • This characteristic offers the advantage of being able to reflect rays coming from the sun without absorbing them.
  • the lighting and / or signaling device is able to be mounted adjacent to a body of a vehicle, said body having a hue
  • the lighting and / or signaling device is innovative in that the variability the light transmission coefficient of the first zone is operated by an electrochromic device comprising particles of a hue identical to that of the body of the vehicle.
  • a first advantage of the invention lies in the ability to hide the water droplets resulting from the condensation that forms in a motor vehicle headlight.
  • Another advantage lies in the possibility of avoiding the use of an additional part such as a mask because the controlled light transmission zone can be placed on the part so as to mask the mechanisms of the internal components of the projector. If a mask must nevertheless be kept in the projector, the invention extends its life by blocking the sun's rays may burn the mask.
  • the figure 1 illustrates a lighting and / or signaling device or projector 1 dedicated to a motor vehicle.
  • This device comprises a housing 2 which forms the rear part of the projector 1.
  • This housing 2 is made from a plastic material and comprises a recessed area which forms an internal volume 3 open on one side.
  • the internal volume 3 is closed by a part 4.
  • the latter is for example a transparent or translucent element.
  • the piece is an ice, in particular made of a transparent material such as glass or a plastic such as polycarbonate.
  • This piece 4 can also be an intermediate screen, that is to say a component installed in the internal volume 3.
  • a first source 5 emitting a light beam 6.
  • This source is for example an incandescent lamp, a Xenon lamp or one or more light-emitting diodes. Part of the light beam passes directly through the room 4 and another part of this beam is reflected by a reflector 7 mounted in the internal volume 3 around the first source 5.
  • Part 4 comprises a first zone 8 which has a variable light transmission coefficient. It is understood here that this first zone 8 can be controlled so as to allow or prohibit the passage of a light beam therethrough. The control or control of the light transmission variability of the first zone is operated electrically.
  • the first zone 8 covers only part of the room 4.
  • the room 4 comprises a second zone 9 distinct from the first zone 8 but adjacent to the latter. This second zone 9 is inert in the sense that its light transmission coefficient is invariable, that is to say incapable of change under voluntary action.
  • the first source 5 and the reflector 7 are arranged so that the light beam passes through mainly or only the second zone 9 because the first zone 8n, the variability of the light transmission of which is controllable, is not intended to form 6.
  • the first controlled zone 8 prevents the introduction of the external light rays 10 to the projector from penetrating inside the internal volume 3. This first zone therefore makes it possible to make the outside invisible. part of the internal volume.
  • the piece 4 in particular the ice, has a curved shape and is delimited by an inner face 12 and an outer face 13.
  • the inner face 12 is turned towards the internal volume while the outer face 13 is opposite to the inner face 12.
  • the outer face 13 faces the external environment of the projector 1.
  • the part 4 is finally delimited by a peripheral edge 14 which borders the workpiece 4 and which connects the inner face 12 to the outer face 13.
  • the first zone 8 has a light transmission whose variability is implemented by means of an electrochromic device 11.
  • the electrochromic device 11 extends on the inner face 12 but the invention also covers the case where the electrochromic device is installed against the outer face 13 or both against the inner face 12 and the outer face 13.
  • the electrochromic device 11 takes the form of a thickness layer between 500 nm and 10 ⁇ m integral with the face in question. Preferably, a thickness of 1 micron is perfectly adapted to the application. In practice, this layer is formed of a plurality of sub-layers which number for example three in number, not including transparent electrodes. In this embodiment, it is the inner face 12. This layer can be sprayed on all or part of the inner face 12 of the part 4. In general, the electrochromic device, and particular particle layer, is affixed to the inner face 12.
  • the electrochromic device is electrically controlled so as to become transparent when it is powered or when it receives a electrical discharge of power while it becomes opaque or reflective when it is no longer electrically powered or when it receives a reverse electric discharge to the electric discharge of supply. In this way, when the ignition of the vehicle is cut off and the projector is no longer powered, the electrochromic device is opaque or reflective.
  • the figure 2 illustrates this particular provision.
  • the projector 1 is shown from the front, the part 4, for example ice, being mounted in a sealed manner on the housing 2.
  • the part 4 is delimited by its external face 13, its inner face 12 and its peripheral edge 14.
  • the first source 5 is also installed so as to cooperate with the reflector 7.
  • the electrochromic device 11 is here installed against the outer face 13 of the part 4 and, as in the variant of FIG. figure 1 , covers the first zone 8 peripherally.
  • the first zone 8 forms a strip which runs on the outer face 13 adjacent to the wafer 14.
  • the second zone 9 is formed by a central part of the part 4 and this second zone is crossed by the light beam emitted by the first source 5.
  • the figure 3 shows the lighting and / or signaling device 1 installed on a vehicle.
  • the first zone 8 covers the entirety of the part 4 by implementing the electrochromic device over the entire surface of the internal face or the external face of the part 4. This is a a situation in which the electrochromic device is rendered opaque or reflective when the first source is extinguished.
  • the electrochromic device when the first source is powered, for example by lighting the town lamp, low beam or high beam function, the electrochromic device varies the light transmission coefficient so as to make room 4 transparent and thus allow the passage of the light beam provided by the first source. It is thus understood that the light beam intersects the first zone 8 at least at a time when its light transmission coefficient allows the passage of the beam, in other words when the first zone 8 is translucent, advantageously transparent.
  • the projector 1 is mounted adjacent to a body 16 of a vehicle.
  • the electrochromic device comprises particles that prohibit or allow the passage of the light beam. These particles are tinted so as to maintain an aesthetic uniformity between the bodywork 16 of the vehicle and the part 4. To do this, the color of the particles is identical to the shade of the bodywork 16.
  • the figure 4 illustrates a second variant of the lighting device and / or signaling 1.
  • This variant is close to those of Figures 1 and 2 in that the part, for example ice or an intermediate screen, comprises a first zone 8 which has a variable light transmission coefficient and a second inert zone 9, that is to say the light transmission coefficient of which is fixed or invariable.
  • the second zone 9 takes a semicircle shape described substantially in the center of the room 4.
  • This opening or zone devoid of electrochromic device is practiced at the right of the first source 5 so as to allow in all circumstances, that is to say regardless of the level of light transmission variability of the first zone 8, the passage of the light beam emitted by the first source 5.
  • the lighting and / or signaling device comprises a first source 5 which is a dipped beam.
  • the surface covered by the first zone 8 is, in this example, equal to approximately 90% of the total surface of the face of the part which serves as a support for the electrochromic device, but the invention finds application from a coverage of 10%, the latter being interesting when its value is at least 30%.
  • Such an organization has a significant advantage. Indeed, the ease of application of the electrochromic device on the part offers possibilities to delimit shapes that contribute to improving aesthetics outside of the vehicle.
  • the figure 5 shows a third embodiment where the lighting and / or signaling device 1 comprises at least a first source 5 and a second source 17.
  • the second source 17 is installed in the internal volume of the projector 1, adjacent to the first source 5.
  • This second source is here a daylighting device which can take the form of an incandescent lamp, a Xenon bulb or one or more light-emitting diodes.
  • the projector 1 further comprises a third source 18 embedded in the internal volume of the projector 1, this third source being assigned to the flashing function.
  • the first zone 8 is here opaque or reflective thanks to the activation of the electrochromic device, which makes it possible to hide the mechanisms of the first, second or third source, while the second zone 9 is transparent so as to release the passage of the beam
  • the first zone 8 is located on the upper part of the part 4 and takes a triangular shape of which one of the sides forms a curve.
  • the second zone 9 takes a generally curved shape. The aesthetic effect is thus close to an eyelid appearance.
  • the area covered by the first zone 8 is, in this example, equal to about 50% of the total surface of the face of the part 4 receiving the electrochromic device.
  • the figure 6 shows the lighting and / or signaling device 1 in a fourth variant corresponding to the ignition of the first source 5.
  • the first zone 8 is here deactivated or controlled so as to make transparent this first zone 8.
  • the light transmission is thus controlled by an electrical control device so as to let the light beam 6 through the room 4. In this example, the entire surface of the room is released and the electrochromic device is invisible.
  • the electrochromic device When neither source is energized, the electrochromic device is energized so as to render the first zone opaque or reflective, in the case of the figure 3 the first zone covering the entirety of one of the faces of the part.
  • the electrochromic device when the second source is energized, is controlled by stopping its power supply so as to make transparent a determined area advantageously to the right of the second source.
  • the electrochromic device is controlled by stopping its power supply so as to allow the passage of the beam through the entire surface of the room.
  • the invention covers the case of a plurality of zones with variable light transmittance. Indeed, the same room can take the position of figures 3 , 5 and 6 .
  • the part then comprises distinct but adjacent zones each supporting an electrochromic device that can be controlled independently from one zone to another.
  • the part of the invention may comprise an area with a variable light transmission coefficient made transparent to the ignition of the second source, as well as another area with a variable light transmission coefficient made transparent at the moment of ignition of the light source.
  • the first source these two areas being made opaque or reflective at the extinction of the first source and the second source.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The part (4) has a zone (8) with variable light transmission coefficient, where the part is arranged to be visible from an outer side of a lighting and/or signaling device i.e. retractable headlight (1), when the part is assembled on the device. The zone partially covers an inner face (12) and an outer face (13) to define another zone (9) that is different from the former zone, where the latter zone has constant light transmission coefficient. Variability of transmission coefficient of the former zone is determined by an electrochromic device (11) that is fixed on the inner face. The part is made of a transparent or translucent element such as glass.

Description

Le secteur technique de la présente invention est celui des dispositifs d'éclairage et/ou de signalisation pour véhicule automobile, et plus particulièrement des glaces équipant de tels dispositifs.The technical sector of the present invention is that of lighting and / or signaling devices for a motor vehicle, and more particularly the windows fitted to such devices.

Un projecteur monté sur un véhicule automobile est classiquement composé d'un boîtier fermé par une glace délimitant ainsi un volume interne dans lequel on trouve une ampoule, un réflecteur et des câbles électriques. La partie mécanique de ces composants est apparente au travers de la glace et il est alors nécessaire de cacher cette partie mécanique.A projector mounted on a motor vehicle is conventionally composed of a housing closed by an ice thus delimiting an internal volume in which there is a bulb, a reflector and electric cables. The mechanical part of these components is apparent through the ice and it is then necessary to hide this mechanical part.

Pour ce faire, l'art antérieur a proposé un projecteur escamotable de sorte à rendre invisible les parties disgracieuses du projecteur quand la commande d'éclairage est inactive. Cependant, ce type de système escamotable est réservé aux véhicules haut de gamme ou sportifs en raison du coût important que la fonction escamotable génère. Par ailleurs, cette fonction implique des mouvements mis en oeuvre par des mécanismes dont il faut assurer la fiabilité.To do this, the prior art has proposed a retractable projector so as to make invisible the unsightly parts of the projector when the lighting control is inactive. However, this type of retractable system is reserved for high-end vehicles or sports because of the significant cost that the retractable function generates. Moreover, this function involves movements implemented by mechanisms whose reliability must be ensured.

Ce problème a également été résolu en installant dans le volume interne du projecteur un masque dont la fonction est de cacher la partie mécanique des composants évoqués ci-dessus. Le masque subit une amplitude de température importante entre des conditions nocturnes et froides et des conditions diurnes et ensoleillées où le masque reçoit les rayons du soleil. Cette solution présente alors l'inconvénient de nécessiter un dimensionnement adapté qui se traduit par une augmentation des tolérances mécaniques pour permettre au masque de se dilater quelque soit la température qui l'environne. Par ailleurs, ces masques sont généralement fabriqués à partir d'une matière plastique dont la surface tend à se dégrader rapidement sous l'action des rayons du soleil lorsque les rayons de ce dernier sont au moins partiellement focalisés sur le masque.This problem has also been solved by installing in the internal volume of the projector a mask whose function is to hide the mechanical part of the components mentioned above. The mask experiences a significant temperature range between cold and nocturnal conditions and day and sunny conditions where the mask receives sunlight. This solution then has the disadvantage of requiring a suitable dimensioning which results in an increase in mechanical tolerances to allow the mask to expand whatever the temperature that surrounds it. Moreover, these masks are generally made from a plastic whose surface tends to degrade rapidly under the action of the sun's rays when the rays of the latter are at least partially focused on the mask.

Enfin, l'écart de température entre l'air extérieur au projecteur et l'air présent dans le volume interne provoque une condensation sur la glace de l'eau présente dans l'air car ce dernier est susceptible de refroidir très brutalement. Les projecteurs sont alors pourvus d'un vernis anti-humidité ou d'un système de ventilation du volume interne du projecteur mais l'efficacité de ces solutions laisse à désirer. En outre, l'application d'un vernis anti-humidité implique un coût supplémentaire et complique le procédé de fabrication d'un tel projecteur et le système de ventilation complique le développement, la fabrication et l'installation du projecteur.Finally, the difference in temperature between the air outside the projector and the air present in the internal volume causes condensation on the ice water in the air because the latter is likely to cool very brutally. The projectors are then provided with a moisture-proof varnish or a system of ventilation of the internal volume of the projector but the effectiveness of these solutions leaves something to be desired. In addition, the application of an anti-moisture varnish involves an additional cost and complicates the manufacturing process of such a projector and the ventilation system complicates the development, manufacture and installation of the projector.

Il convient donc de trouver une solution fiable et peu couteuse pour cacher les parties mécaniques à l'intérieur du projecteur et rendre invisible la condensation qui se forme sur la glace à l'intérieur du projecteur, sans pour autant impacter négativement la fonction d'éclairage dévolue au projecteur.It is therefore necessary to find a reliable and inexpensive solution to hide the mechanical parts inside the projector and make invisible the condensation that forms on the ice inside the projector, without negatively impacting the lighting function dedicated to the projector.

Le but de la présente invention est donc de résoudre les inconvénients décrits ci-dessus principalement en installant sur une glace d'un projecteur de véhicule automobile un système dont la transparence est commandée électriquement.The object of the present invention is therefore to solve the disadvantages described above mainly by installing on a mirror of a motor vehicle headlight a system whose transparency is electrically controlled.

L'invention a donc pour objet une pièce d'un dispositif d'éclairage et/ou de signalisation pour véhicule automobile, cette pièce étant agencée pour être visible depuis l'extérieur du dispositif lorsque cette pièce est montée sur ce dispositif, caractérisée en ce qu'elle comprend une première zone présentant un coefficient de transmission lumineuse variable. On entend par variable le fait que la première zone peut prendre au moins deux états dans lesquels la perception du faisceau lumineux est significativement différente. Il est préférentiellement envisagé que la variabilité soit du type tout ou rien, c'est-à-dire un premier cas dans lequel le faisceau lumineux traverse la première zone sans altération et un deuxième cas dans lequel le faisceau lumineux ne traverse pas la première zone. Dans ce deuxième cas, la première zone est opaque ou réfléchissante. Dans ces deux cas, le faisceau lumineux ne traverse pas la première zone mais l'invention couvre le cas où les rayons extérieurs sont absorbés (opacité) ainsi que le cas où les rayons extérieurs sont renvoyés ou réfléchis, ce dernier cas évitant un échauffement de la pièce. La variabilité envisagée ici est activée ou désactivée de manière électrique. La pièce est visible lorsqu'elle est installée sur le dispositif en ce sens qu'elle est apparente à l'examen du dispositif depuis l'extérieur de ce dernier. Il s'agit notamment d'une glace, d'un écran intermédiaire ou d'un composant interne au dispositif.The subject of the invention is therefore a part of a lighting and / or signaling device for a motor vehicle, this part being arranged to be visible from the outside of the device when this part is mounted on this device, characterized in that it comprises a first zone having a variable light transmission coefficient. By variable is meant the fact that the first zone can take at least two states in which the perception of the light beam is significantly different. It is preferentially envisaged that the variability is of the all-or-nothing type, that is to say a first case in which the light beam passes through the first zone without alteration and a second case in which the light beam does not cross the first zone. . In this second case, the first zone is opaque or reflective. In these two cases, the light beam does not cross the first zone but the invention covers the case where the outer rays are absorbed (opacity) as well as the case where the outer rays are returned or reflected, the latter case avoiding a heating of the room. The variability considered here is activated or deactivated electrically. The piece is visible when it is installed on the device in that it is apparent on examination of the device from outside the device. These include an ice, an intermediate screen or an internal component to the device.

Selon une première caractéristique de l'invention, la pièce est délimitée par une face interne et une face externe et dans laquelle la première zone couvre l'intégralité d'au moins une desdites faces. La zone à coefficient de transmission lumineuse variable est ainsi formée par l'une des deux faces constituant la pièce, ces faces étant les parties de la pièce qui s'étendent dans un plan concourant et distinct par rapport à la source lumineuse.According to a first feature of the invention, the part is delimited by an inner face and an outer face and wherein the first zone covers the entirety of at least one of said faces. The region with a variable light transmission coefficient is thus formed by one of the two faces constituting the part, these faces being the parts of the part which extend in a concurrent and distinct plane with respect to the light source.

Selon une deuxième caractéristique de l'invention, la pièce est délimitée par la face interne et la face externe et la première zone couvre partiellement au moins une desdites faces de sorte à délimiter une deuxième zone distincte de la première zone, la deuxième zone présentant un coefficient de transmission lumineuse invariable. On comprend ici que la zone à coefficient de transmission lumineuse variable n'occupe pas l'intégralité de la face, la partie restante étant formée par la pièce au travers de laquelle le faisceau lumineux n'est pas altéré par un dispositif pilotable. Ainsi, une partie de la pièce et plus spécifiquement la deuxième zone est sensiblement au droit de la source de lumière alors que la première zone peut être adjacente à la deuxième zone est ainsi rendre invisible de l'utilisateur certaines parties mécaniques du projecteur équipé d'une telle pièce.According to a second characteristic of the invention, the part is delimited by the internal face and the external face and the first zone partially covers at least one of said faces so as to delimit a second zone distinct from the first zone, the second zone having a invariable light transmission coefficient. It will be understood here that the area with variable light transmission coefficient does not occupy the entire face, the remaining part being formed by the part through which the light beam is not altered by a controllable device. Thus, part of the room and more specifically the second zone is substantially at the right of the light source while the first zone may be adjacent to the second zone is thus make invisible to the user some mechanical parts of the projector equipped with such a room.

Selon une autre caractéristique de l'invention, la première zone couvre entre 10% et 90% de la face concernée. Cette tranche de valeur garantit un bon niveau d'opacité ou de réflexion tout en laissant transparente la deuxième zone de la pièce. Avantageusement, la première zone couvre au moins 30% de la face concernée.According to another characteristic of the invention, the first zone covers between 10% and 90% of the face concerned. This slice of value guarantees a good level of opacity or reflection while leaving the second zone of the room transparent. Advantageously, the first zone covers at least 30% of the face concerned.

Selon encore une caractéristique de l'invention, la première zone couvre une périphérie de la face concernée. Cette périphérie prend la forme d'un ou plusieurs bandeaux continus ou interrompus autour de la deuxième zone dont le coefficient de transmission lumineuse est invariable. Cette solution trouve un avantage particulier pour cacher la condensation dans le projecteur car c'est sur les bords externes de la pièce, c'est-à-dire à la périphérie par exemple de la glace, que la température change le plus brutalement provoquant ainsi la formation de gouttelettes d'eau.According to another characteristic of the invention, the first zone covers a periphery of the face in question. This periphery takes the form of one or more continuous or interrupted bands around the second zone whose luminous transmittance is invariable. This solution finds a particular advantage to hide the condensation in the projector because it is on the outer edges of the room, that is to say at the periphery for example of the ice, that the temperature changes the more abruptly thus causing the formation of water droplets.

Selon encore une autre caractéristique de l'invention, la première zone couvre la face interne de la pièce. La face interne de la pièce, notamment la glace, est la face tournée vers le boîtier du dispositif d'éclairage. On comprend donc que la première zone est installée sur la pièce mais à l'intérieur du projecteur de sorte à protéger le dispositif mettant en oeuvre la variabilité des agressions extérieures.According to yet another characteristic of the invention, the first zone covers the inner face of the piece. The inner face of the part, in particular the ice, is the face turned towards the housing of the lighting device. It is thus understood that the first zone is installed on the part but inside the projector so as to protect the device implementing the variability of external aggression.

A titre d'exemple de réalisation, la variabilité du coefficient de transmission lumineuse de la première zone est opérée par un dispositif électrochromique, ce terme englobant notamment dans la description ci-dessous une encre électronique comprenant des particules suspendues (de l'anglais « Suspended particles device »). Ce dispositif électrochromique se comporte comme un condensateur commandé par un dispositif électronique de commande dont la fonction consiste à appliquer au dispositif électrochromique une charge électrique.As an exemplary embodiment, the variability of the light transmission coefficient of the first zone is operated by an electrochromic device, this term encompassing in particular in the description below an electronic ink comprising suspended particles (of the English "Suspended particles device "). This electrochromic device behaves like a capacitor controlled by an electronic control device whose function is to apply to the electrochromic device an electric charge.

Ce dispositif électrochromique prend la forme d'une couche solidaire d'épaisseur comprise entre 500nm et 10µm de la face concernée, avantageusement 1 µm. Par solidaire, on entend par exemple un collage de la couche sur la face interne ou sur la face externe. On entend aussi par exemple une adhérence moléculaire suite à un dépôt sous vide, mais tout autre moyen permettant de relier cette couche à cette face entre dans le champ du mot solidaire. Cette couche comprend par exemple des particules d'oxyde de tungstène en suspension dont la position dans la couche est réversible lorsqu'une charge électrique leurs est appliquée.This electrochromic device takes the form of a solid layer having a thickness of between 500 nm and 10 μm of the face in question, advantageously 1 μm. By solidarity, for example means a bonding of the layer on the inner face or on the outer face. For example, molecular adhesion is also understood to mean vacuum deposition, but any other means for connecting this layer to this face enters the field of the integral word. This layer comprises for example tungsten oxide particles in suspension, the position in the layer is reversible when an electric charge is applied thereto.

L'invention trouve une application particulière quand la pièce est un élément transparent ou translucide constitutif du dispositif d'éclairage et/ou de signalisation. Il s'agit notamment de la glace qui délimite un volume interne du dispositif par rapport à l'extérieur de ce dernier.The invention finds particular application when the part is a transparent or translucent element constituting the lighting and / or signaling device. These include the ice which defines an internal volume of the device relative to the outside of the latter.

L'invention trouve aussi une application intéressante quand la pièce est un écran intermédiaire, par exemple installé dans le volume interne du dispositif.The invention also finds an interesting application when the part is an intermediate screen, for example installed in the internal volume of the device.

L'invention couvre également un dispositif d'éclairage et/ou de signalisation comprenant une première source émettrice d'un faisceau lumineux installée dans un volume interne délimité par un boîtier et une pièce selon l'une quelconque des caractéristiques évoquées ci-dessus.The invention also covers a lighting and / or signaling device comprising a first source emitting a light beam installed in an internal volume delimited by a housing and a room according to any one of the characteristics mentioned above.

Avantageusement encore, le faisceau lumineux croise la première zone. Il est ainsi possible de rendre apparent le faisceau en pilotant la première zone.Advantageously, the light beam crosses the first zone. It is thus possible to make the beam visible by driving the first zone.

De manière préférentielle, le faisceau lumineux croise une deuxième zone distincte de la première zone, la deuxième zone présentant un coefficient de transmission lumineuse invariable. On réduit ainsi la surface couverte par la première zone au strict nécessaire pour cacher la condensation ou les mécanismes des composants internes du projecteur.Preferably, the light beam crosses a second zone distinct from the first zone, the second zone having an invariable light transmission coefficient. This reduces the area covered by the first zone to the bare minimum necessary to hide the condensation or mechanisms of the internal components of the projector.

Dans une amélioration de l'invention, le dispositif d'éclairage et/ou de signalisation comprend une deuxième source émettrice d'un faisceau lumineux, ladite première zone étant installée au droit du faisceau lumineux émis par la deuxième source. Cette deuxième source lumineuse peut être une lampe de ville, un clignotant ou un éclairage diurne dédié. Ainsi, la première zone pilotable peut rendre apparent une fonction supplémentaire embarquée dans le dispositif d'éclairage sans pour autant rendre transparent le reste de la pièce.In an improvement of the invention, the lighting and / or signaling device comprises a second source emitting a light beam, said first zone being installed in line with the light beam emitted by the second source. This second light source can be a town lamp, a flashing light or a dedicated daylight. Thus, the first controllable area can make apparent an additional function embedded in the lighting device without rendering transparent the rest of the room.

La variabilité du coefficient de transmission lumineuse de la première zone est opérée par un dispositif électrochromique dont l'opacité ou la réflexion est activée lorsque la première source lumineuse est éteinte. L'activation, c'est-à-dire le caractère opaque ou réfléchissant, ou la désactivation, c'est-à-dire le caractère transparent de la zone, sont placées sous la dépendance de l'allumage de la première source lumineuse. En pratique, si l'utilisateur allume par exemple ses feux de croisement, la première zone devient transparente de manière à ne pas gêner le passage du faisceau lumineux.The variability of the light transmission coefficient of the first zone is operated by an electrochromic device whose opacity or reflection is activated when the first light source is extinguished. The activation, that is to say the opaque or reflective, or the deactivation, that is to say the transparent nature of the area, are placed under the control of the ignition of the first light source. In practice, if the user turns on for example its low beam, the first area becomes transparent so as not to hinder the passage of the light beam.

Dans un exemple de mise en oeuvre de l'invention, la première zone présente un coefficient de transmission lumineuse variable de manière à devenir, de manière prédéterminée, transparente ou réfléchissante.In an exemplary implementation of the invention, the first zone has a variable light transmission coefficient so as to become, in a predetermined manner, transparent or reflective.

La variabilité du coefficient de transmission lumineuse de cette première zone est opérée par une encre électronique comprenant des particules suspendues (de l'anglais « Suspended particles device » ou encore SPD).The variability of the light transmission coefficient of this first zone is operated by an electronic ink comprising suspended particles (of the English "Suspended particles device" or SPD).

Cette caractéristique offre l'avantage de pouvoir réfléchir des rayons issus du soleil sans les absorber.This characteristic offers the advantage of being able to reflect rays coming from the sun without absorbing them.

De tels rayons sont en effet susceptibles de pénétrer dans le dispositif (phénomène aussi appelé 'Sun Burn') ou encore d'être absorbés par des éléments opaques de ce dispositif. Ces phénomènes ont pour conséquence d'augmenter la température dans le dispositif et donc d'endommager des pièces par exemple réalisées en matière plastique.Such rays are indeed likely to penetrate into the device (phenomenon also called 'Sun Burn') or to be absorbed by opaque elements of this device. These phenomena have the effect of increasing the temperature in the device and thus damage parts for example made of plastic.

Enfin, le dispositif d'éclairage et/ou de signalisation est apte à être monté adjacent à une carrosserie d'un véhicule, ladite carrosserie présentant une teinte, et le dispositif d'éclairage et/ou de signalisation est innovant en ce que la variabilité du coefficient de transmission lumineuse de la première zone est opérée par un dispositif électrochromique comprenant des particules d'une teinte identique à celle de la carrosserie du véhicule.Finally, the lighting and / or signaling device is able to be mounted adjacent to a body of a vehicle, said body having a hue, and the lighting and / or signaling device is innovative in that the variability the light transmission coefficient of the first zone is operated by an electrochromic device comprising particles of a hue identical to that of the body of the vehicle.

Un tout premier avantage selon l'invention réside dans la possibilité de masquer les gouttelettes d'eau consécutives à la condensation qui se forme dans un projecteur de véhicule automobile.A first advantage of the invention lies in the ability to hide the water droplets resulting from the condensation that forms in a motor vehicle headlight.

Un autre avantage réside dans la possibilité d'éviter l'utilisation d'une pièce supplémentaire telle qu'un masque car la zone à transmission lumineuse pilotée peut être placée sur la pièce de manière à occulter les mécanismes des composants internes du projecteur. Si un masque doit néanmoins être maintenu dans le projecteur, l'invention allonge sa durée de vie en bloquant les rayons du soleil susceptibles de brûler le masque.Another advantage lies in the possibility of avoiding the use of an additional part such as a mask because the controlled light transmission zone can be placed on the part so as to mask the mechanisms of the internal components of the projector. If a mask must nevertheless be kept in the projector, the invention extends its life by blocking the sun's rays may burn the mask.

D'autres caractéristiques, détails et avantages de l'invention ressortiront plus clairement à la lecture de la description donnée ci-après à titre indicatif en relation avec des dessins dans lesquels :

  • la figure 1 est une vue en coupe d'un dispositif d'éclairage et/ou de signalisation équipé d'une pièce selon l'invention,
  • la figure 2 est une vue de face de la pièce de la figure 1,
  • la figure 3 est une vue de face du dispositif d'éclairage et/ou de signalisation selon l'invention installé sur un véhicule selon une première variante,
  • la figure 4 est une vue de face du dispositif d'éclairage et/ou de signalisation selon l'invention installé sur un véhicule dans une deuxième variante,
  • la figure 5 est une vue de face du dispositif d'éclairage et/ou de signalisation selon l'invention installé sur un véhicule selon un premier mode de fonctionnement,
  • la figure 6 est une vue de face du dispositif d'éclairage et/ou de signalisation selon l'invention installé sur un véhicule selon un deuxième mode de fonctionnement.
Other characteristics, details and advantages of the invention will emerge more clearly on reading the description given below as an indication in relation to drawings in which:
  • the figure 1 is a sectional view of a lighting and / or signaling device equipped with a part according to the invention,
  • the figure 2 is a front view of the room from the figure 1 ,
  • the figure 3 is a front view of the lighting and / or signaling device according to the invention installed on a vehicle according to a first variant,
  • the figure 4 is a front view of the lighting and / or signaling device according to the invention installed on a vehicle in a second variant,
  • the figure 5 is a front view of the lighting and / or signaling device according to the invention installed on a vehicle according to a first embodiment of operation,
  • the figure 6 is a front view of the lighting device and / or signaling according to the invention installed on a vehicle according to a second mode of operation.

Il faut noter que les figures exposent l'invention de manière détaillée, lesdites figures peuvent bien entendu servir à mieux définir l'invention le cas échéant.It should be noted that the figures show the invention in detail, said figures can of course be used to better define the invention where appropriate.

La figure 1 illustre un dispositif d'éclairage et/ou de signalisation ou projecteur 1 dédié à un véhicule automobile. Ce dispositif comprend un boîtier 2 qui forme la partie arrière du projecteur 1. Ce boîtier 2 est fabriqué à partir d'un matériau plastique et comprend une zone évidée qui forme un volume interne 3 ouvert sur un côté. Le volume interne 3 est fermé par une pièce 4. Cette dernière est par exemple un élément transparent ou translucide. Selon un exemple de réalisation, la pièce est une glace, notamment constituée d'un matériau transparent tel que le verre ou un plastique comme par exemple le polycarbonate.The figure 1 illustrates a lighting and / or signaling device or projector 1 dedicated to a motor vehicle. This device comprises a housing 2 which forms the rear part of the projector 1. This housing 2 is made from a plastic material and comprises a recessed area which forms an internal volume 3 open on one side. The internal volume 3 is closed by a part 4. The latter is for example a transparent or translucent element. According to an exemplary embodiment, the piece is an ice, in particular made of a transparent material such as glass or a plastic such as polycarbonate.

Cette pièce 4 peut également être un écran intermédiaire, c'est-à-dire un composant installé dans le volume interne 3.This piece 4 can also be an intermediate screen, that is to say a component installed in the internal volume 3.

A l'intérieur du volume interne est installée une première source 5 émettrice d'un faisceau lumineux 6. Cette source est par exemple une lampe à incandescence, une lampe au Xénon ou une ou plusieurs diodes électroluminescentes. Une partie du faisceau lumineux traverse directement la pièce 4 et une autre partie de ce faisceau est reflété par un réflecteur 7 monté dans le volume interne 3 autour de la première source 5.Inside the internal volume is installed a first source 5 emitting a light beam 6. This source is for example an incandescent lamp, a Xenon lamp or one or more light-emitting diodes. Part of the light beam passes directly through the room 4 and another part of this beam is reflected by a reflector 7 mounted in the internal volume 3 around the first source 5.

La pièce 4 comprend une première zone 8 qui présente un coefficient de transmission lumineuse variable. On comprend ici que cette première zone 8 peut être commandée de sorte à autoriser ou interdire le passage d'un rayon lumineux à son travers. La commande ou le pilotage de la variabilité de transmission lumineuse de la première zone est opéré de manière électrique. Dans cet exemple de réalisation, La première zone 8 ne couvre qu'une partie de la pièce 4. La pièce 4 comprend une deuxième zone 9 distincte de la première zone 8 mais adjacente à cette dernière. Cette deuxième zone 9 est inerte en ce sens que son coefficient de transmission lumineuse est invariable, c'est-à-dire incapable de changer sous une action volontaire.Part 4 comprises a first zone 8 which has a variable light transmission coefficient. It is understood here that this first zone 8 can be controlled so as to allow or prohibit the passage of a light beam therethrough. The control or control of the light transmission variability of the first zone is operated electrically. In this embodiment, the first zone 8 covers only part of the room 4. The room 4 comprises a second zone 9 distinct from the first zone 8 but adjacent to the latter. This second zone 9 is inert in the sense that its light transmission coefficient is invariable, that is to say incapable of change under voluntary action.

On notera que la première source 5 et le réflecteur 7 sont agencés pour que le faisceau lumineux traverse principalement, ou uniquement, la deuxième zone 9 car la première zone 8n dont la variabilité de la transmission lumineuse est pilotable, n'est pas destinée à former un écran pour le faisceau lumineux 6. En revanche, la première zone 8 pilotée empêche l'introduction des rayons lumineux extérieurs 10 au projecteur de pénétrer à l'intérieur du volume interne 3. Cette première zone permet donc de rendre invisible de l'extérieur une partie du volume interne.It should be noted that the first source 5 and the reflector 7 are arranged so that the light beam passes through mainly or only the second zone 9 because the first zone 8n, the variability of the light transmission of which is controllable, is not intended to form 6. On the other hand, the first controlled zone 8 prevents the introduction of the external light rays 10 to the projector from penetrating inside the internal volume 3. This first zone therefore makes it possible to make the outside invisible. part of the internal volume.

La pièce 4, notamment la glace, présente une forme galbée et est délimitée par une face interne 12 et une face externe 13. La face interne 12 est tournée vers le volume interne alors que la face externe 13 est opposée à la face interne 12. Autrement dit, la face externe 13 est tournée vers l'environnement extérieur au projecteur 1. La pièce 4 est enfin délimitée par une tranche périphérique 14 qui borde la pièce 4 et qui relie la face interne 12 à la face externe 13.The piece 4, in particular the ice, has a curved shape and is delimited by an inner face 12 and an outer face 13. The inner face 12 is turned towards the internal volume while the outer face 13 is opposite to the inner face 12. In other words, the outer face 13 faces the external environment of the projector 1. The part 4 is finally delimited by a peripheral edge 14 which borders the workpiece 4 and which connects the inner face 12 to the outer face 13.

La première zone 8 présente une transmission lumineuse dont la variabilité est mise en oeuvre au moyen d'un dispositif électrochromique 11. Dans cet exemple de réalisation, le dispositif électrochromique 11 s'étend sur la face interne 12 mais l'invention couvre également le cas où le dispositif électrochromique est installé contre la face externe 13 ou à la fois contre la face interne 12 et la face externe 13.The first zone 8 has a light transmission whose variability is implemented by means of an electrochromic device 11. In this embodiment, the electrochromic device 11 extends on the inner face 12 but the invention also covers the case where the electrochromic device is installed against the outer face 13 or both against the inner face 12 and the outer face 13.

Le dispositif électrochromique 11 prend la forme d'une couche d'épaisseur comprise entre 500nm et 10µm solidaire de la face concernée. Préférentiellement, une épaisseur de 1 µm est parfaitement adaptée à l'application. En pratique, cette couche est formée d'une pluralité de sous-couches qui se comptent par exemple au nombre de trois, non compris des électrodes transparentes. Dans cet exemple de réalisation, il s'agit de la face interne 12. Cette couche peut être pulvérisée sur la totalité ou sur une partie sur la face interne 12 de la pièce 4. D'une manière générale, le dispositif électrochromique, et en particulier la couche de particules, est apposé sur la face interne 12.The electrochromic device 11 takes the form of a thickness layer between 500 nm and 10 μm integral with the face in question. Preferably, a thickness of 1 micron is perfectly adapted to the application. In practice, this layer is formed of a plurality of sub-layers which number for example three in number, not including transparent electrodes. In this embodiment, it is the inner face 12. This layer can be sprayed on all or part of the inner face 12 of the part 4. In general, the electrochromic device, and particular particle layer, is affixed to the inner face 12.

De préférence, le dispositif électrochromique est commandé électriquement de manière à devenir transparent quand il est alimenté ou quand il reçoit une décharge électrique d'alimentation alors qu'il devient opaque ou réfléchissant quand il n'est plus alimenté électriquement ou quand il reçoit une décharge électrique inverse à la décharge électrique d'alimentation. De cette manière, lorsque le contact du véhicule est coupé et que le projecteur n'est plus alimenté, le dispositif électrochromique est opaque ou réfléchissant.Preferably, the electrochromic device is electrically controlled so as to become transparent when it is powered or when it receives a electrical discharge of power while it becomes opaque or reflective when it is no longer electrically powered or when it receives a reverse electric discharge to the electric discharge of supply. In this way, when the ignition of the vehicle is cut off and the projector is no longer powered, the electrochromic device is opaque or reflective.

Les gouttelettes d'eau 15 formées dans les zones froides du projecteur, par exemple à la périphérie de ce dernier, sont ainsi rendues invisibles de l'extérieur puisque le dispositif électrochromique 11 bloque le champ de vision depuis l'extérieur du projecteur 1. Il est donc préféré d'installer le dispositif électrochromique 11 à la périphérie externe de la pièce 4 et de manière adjacente à la tranche 14.The water droplets 15 formed in the cold zones of the headlamp, for example at the periphery of the latter, are thus made invisible from the outside since the electrochromic device 11 blocks the field of view from outside the headlamp 1. It is therefore preferred to install the electrochromic device 11 at the outer periphery of the part 4 and adjacent to the wafer 14.

La figure 2 illustre plus particulièrement cette disposition. Le projecteur 1 est représenté de face, la pièce 4, par exemple la glace, étant montée de manière étanche sur le boîtier 2.The figure 2 illustrates this particular provision. The projector 1 is shown from the front, the part 4, for example ice, being mounted in a sealed manner on the housing 2.

La pièce 4 est délimitée par se face externe 13, sa face interne 12 et son bord périphérique 14. La première source 5 est également installée de manière à coopérer avec le réflecteur 7.The part 4 is delimited by its external face 13, its inner face 12 and its peripheral edge 14. The first source 5 is also installed so as to cooperate with the reflector 7.

Le dispositif électrochromique 11 est ici installé contre la face externe 13 de la pièce 4 et, comme sur la variante de la figure 1, couvre la première zone 8 de manière périphérique. Ainsi, la première zone 8 forme un bandeau qui court sur la face externe 13 de manière adjacente à la tranche 14. Ainsi, la deuxième zone 9 est formée par une partie centrale de la pièce 4 et cette deuxième zone est traversée par le faisceau lumineux émit par la première source 5.The electrochromic device 11 is here installed against the outer face 13 of the part 4 and, as in the variant of FIG. figure 1 , covers the first zone 8 peripherally. Thus, the first zone 8 forms a strip which runs on the outer face 13 adjacent to the wafer 14. Thus, the second zone 9 is formed by a central part of the part 4 and this second zone is crossed by the light beam emitted by the first source 5.

La figure 3 montre le dispositif d'éclairage et/ou de signalisation 1 installé sur un véhicule. Selon cette première variante, la première zone 8 couvre l'intégralité de la pièce 4 par mise en oeuvre du dispositif électrochromique sur toute la surface de la face interne ou de la face externe de la pièce 4. Il s'agit ici d'une situation dans laquelle le dispositif électrochromique est rendu opaque ou réfléchissant quand la première source est éteinte. En revanche, quand la première source est alimentée, par exemple par allumage de la fonction lampe de ville, feu de croisement ou feu de route, le dispositif électrochromique fait varier le coefficient de transmission lumineuse de sorte à rendre transparente la pièce 4 et ainsi autoriser le passage du faisceau lumineux fournit par la première source. On comprend ainsi que le faisceau lumineux croise la première zone 8 au moins en un moment où son coefficient de transmission lumineuse autorise le passage du faisceau, autrement dit quand la première zone 8 est translucide, avantageusement transparente.The figure 3 shows the lighting and / or signaling device 1 installed on a vehicle. According to this first variant, the first zone 8 covers the entirety of the part 4 by implementing the electrochromic device over the entire surface of the internal face or the external face of the part 4. This is a a situation in which the electrochromic device is rendered opaque or reflective when the first source is extinguished. On the other hand, when the first source is powered, for example by lighting the town lamp, low beam or high beam function, the electrochromic device varies the light transmission coefficient so as to make room 4 transparent and thus allow the passage of the light beam provided by the first source. It is thus understood that the light beam intersects the first zone 8 at least at a time when its light transmission coefficient allows the passage of the beam, in other words when the first zone 8 is translucent, advantageously transparent.

On notera tout particulièrement que le projecteur 1 est monté adjacent à une carrosserie 16 d'un véhicule. Dans une telle situation, le dispositif électrochromique comprend des particules qui interdisent ou autorisent le passage du faisceau lumineux. Ces particules sont teintées de sorte à maintenir une uniformité esthétique entre la carrosserie 16 du véhicule et la pièce 4. Pour ce faire, la teinte des particules est identique à la teinte de la carrosserie 16.It will be particularly noted that the projector 1 is mounted adjacent to a body 16 of a vehicle. In such a situation, the electrochromic device comprises particles that prohibit or allow the passage of the light beam. These particles are tinted so as to maintain an aesthetic uniformity between the bodywork 16 of the vehicle and the part 4. To do this, the color of the particles is identical to the shade of the bodywork 16.

La figure 4 illustre une deuxième variante du dispositif d'éclairage et/ou de signalisation 1. Cette variante est proche de celles des figures 1 et 2 en ce que la pièce, par exemple la glace ou un écran intermédiaire, comprend une première zone 8 qui présente un coefficient de transmission lumineuse variable et une deuxième zone 9 inerte, c'est-à-dire dont le coefficient de transmission lumineuse est fixe ou invariable.The figure 4 illustrates a second variant of the lighting device and / or signaling 1. This variant is close to those of Figures 1 and 2 in that the part, for example ice or an intermediate screen, comprises a first zone 8 which has a variable light transmission coefficient and a second inert zone 9, that is to say the light transmission coefficient of which is fixed or invariable.

La deuxième zone 9 prend une forme de demi-cercle décrit sensiblement au centre de la pièce 4. Cette ouverture ou zone dépourvue de dispositif électrochromique est pratiquée au droit de la première source 5 de sorte à autoriser en toutes circonstances, c'est-à-dire quelque soit le niveau de variabilité de transmission lumineuse de la première zone 8, le passage du faisceau lumineux émis par la première source 5. Dans ce mode de réalisation, le dispositif d'éclairage et/ou de signalisation comprend une première source 5 qui est un feu de croisement. La surface couverte par la première zone 8 est, dans cet exemple, égale à environ 90% de la surface totale de la face de la pièce qui sert de support au dispositif électrochromique mais l'invention trouve une application dès une couverture de 10%, cette dernière étant intéressante quand sa valeur est d'au moins 30%.The second zone 9 takes a semicircle shape described substantially in the center of the room 4. This opening or zone devoid of electrochromic device is practiced at the right of the first source 5 so as to allow in all circumstances, that is to say regardless of the level of light transmission variability of the first zone 8, the passage of the light beam emitted by the first source 5. In this embodiment, the lighting and / or signaling device comprises a first source 5 which is a dipped beam. The surface covered by the first zone 8 is, in this example, equal to approximately 90% of the total surface of the face of the part which serves as a support for the electrochromic device, but the invention finds application from a coverage of 10%, the latter being interesting when its value is at least 30%.

Une telle organisation présente un avantage non négligeable. En effet, la facilité d'application du dispositif électrochromique sur la pièce offre des possibilités pour délimiter des formes qui participent à améliorer l'esthétique extérieure du véhicule. Le fait que la pièce présente, d'une part une première zone dont le coefficient de transmission lumineuse est variable ou pilotable, et d'autre part une deuxième zone dont le coefficient de transmission est invariable, permet de dessiner des formes en trompe l'oeil.Such an organization has a significant advantage. Indeed, the ease of application of the electrochromic device on the part offers possibilities to delimit shapes that contribute to improving aesthetics outside of the vehicle. The fact that the part has, on the one hand a first zone whose light transmittance coefficient is variable or controllable, and secondly a second zone whose transmission coefficient is invariable, makes it possible to draw shapes in the form of a horn. eye.

La figure 5 montre une troisième variante de réalisation où le dispositif d'éclairage et/ou de signalisation 1 comprend au moins une première source 5 et une deuxième source 17. La deuxième source 17 est installée dans le volume interne du projecteur 1, de manière adjacente à la première source 5. Cette deuxième source est ici un dispositif d'éclairage diurne qui peut prendre la forme d'une lampe à incandescence, d'une ampoule au Xénon ou d'une ou plusieurs diodes électroluminescentes. On constate encore que le projecteur 1 comprend en outre une troisième source 18 embarquée dans le volume interne du projecteur 1, cette troisième source étant dévolue à la fonction clignotant.The figure 5 shows a third embodiment where the lighting and / or signaling device 1 comprises at least a first source 5 and a second source 17. The second source 17 is installed in the internal volume of the projector 1, adjacent to the first source 5. This second source is here a daylighting device which can take the form of an incandescent lamp, a Xenon bulb or one or more light-emitting diodes. It is also noted that the projector 1 further comprises a third source 18 embedded in the internal volume of the projector 1, this third source being assigned to the flashing function.

La première zone 8 est ici opaque ou réfléchissante grâce à l'activation du dispositif électrochromique, ce qui permet de cacher les mécanismes de la première, deuxième ou troisième source, alors que la deuxième zone 9 est transparente de sorte à libérer le passage du faisceau lumineux émis par la deuxième source 17. Dans cette variante, la première zone 8 est localisée sur la partie supérieure de la pièce 4 et prend une forme triangulaire dont l'un des côtés forme une courbe. De manière complémentaire, la deuxième zone 9 prend une forme générale courbée. L'effet esthétique est ainsi proche d'une apparence de paupière.The first zone 8 is here opaque or reflective thanks to the activation of the electrochromic device, which makes it possible to hide the mechanisms of the first, second or third source, while the second zone 9 is transparent so as to release the passage of the beam In this variant, the first zone 8 is located on the upper part of the part 4 and takes a triangular shape of which one of the sides forms a curve. In a complementary manner, the second zone 9 takes a generally curved shape. The aesthetic effect is thus close to an eyelid appearance.

La surface couverte par la première zone 8 est, dans cet exemple, égale à environ 50% de la surface totale de la face de la pièce 4 recevant le dispositif électrochromique.The area covered by the first zone 8 is, in this example, equal to about 50% of the total surface of the face of the part 4 receiving the electrochromic device.

La figure 6 montre le dispositif d'éclairage et/ou de signalisation 1 dans une quatrième variante correspondant à l'allumage de la première source 5. La première zone 8 est ici désactivée ou pilotée de sorte à rendre transparente cette première zone 8. La transmission lumineuse est ainsi pilotée par un dispositif de commande électrique de sorte à laisser passer le faisceau lumineux 6 au travers de la pièce 4. Dans cet exemple, l'intégralité de la surface de la pièce est libérée et le dispositif électrochromique est invisible.The figure 6 shows the lighting and / or signaling device 1 in a fourth variant corresponding to the ignition of the first source 5. The first zone 8 is here deactivated or controlled so as to make transparent this first zone 8. The light transmission is thus controlled by an electrical control device so as to let the light beam 6 through the room 4. In this example, the entire surface of the room is released and the electrochromic device is invisible.

Dans le cas où la première zone supportant le dispositif électrochromique s'étend sur l'intégralité de la face interne ou de la face externe de la pièce 4, le passage de la situation illustrée sur la figure 3 à la situation illustrée aux figures 5 ou 6 s'opère comme suit.In the case where the first zone supporting the electrochromic device extends over the entirety of the internal face or the external face of the part 4, the passage of the situation illustrated on FIG. figure 3 to the situation illustrated in Figures 5 or 6 is as follows.

Quand aucune des deux sources n'est alimentée, le dispositif électrochromique est sous tension de sorte à rendre opaque ou réfléchissante la première zone, dans le cas de la figure 3 la première zone couvrant l'intégralité d'une des faces de la pièce.When neither source is energized, the electrochromic device is energized so as to render the first zone opaque or reflective, in the case of the figure 3 the first zone covering the entirety of one of the faces of the part.

En ce qui concerne la variante de la figure 5, quand la deuxième source est alimentée, le dispositif électrochromique est piloté en arrêtant son alimentation électrique de sorte à rendre transparent une zone déterminée avantageusement au droit de la deuxième source.With regard to the variant of the figure 5 when the second source is energized, the electrochromic device is controlled by stopping its power supply so as to make transparent a determined area advantageously to the right of the second source.

En ce qui concerne le mode de fonctionnement de la figure 6, quand la première source est alimentée, le dispositif électrochromique est piloté par arrêt de son alimentation électrique de sorte à autoriser le passage du faisceau au travers de l'intégralité de la surface de la pièce.As regards the mode of operation of the figure 6 when the first source is powered, the electrochromic device is controlled by stopping its power supply so as to allow the passage of the beam through the entire surface of the room.

Bien entendu, l'invention couvre le cas d'une pluralité de zones à coefficient de transmission lumineuse variable. En effet, une même pièce peut prendre la position des figures 3, 5 et 6. La pièce comporte alors des zones distinctes mais adjacentes supportant chacune un dispositif électrochromique pilotable de manière indépendante d'une zone à l'autre.Of course, the invention covers the case of a plurality of zones with variable light transmittance. Indeed, the same room can take the position of figures 3 , 5 and 6 . The part then comprises distinct but adjacent zones each supporting an electrochromic device that can be controlled independently from one zone to another.

Ainsi, la pièce de l'invention peut comprendre une zone à coefficient de transmission lumineuse variable rendue transparente à l'allumage de la deuxième source, ainsi qu'une autre zone à coefficient de transmission lumineuse variable rendue transparente au moment de l'allumage de la première source, ces deux zones étant rendues opaques ou réfléchissantes à l'extinction de la première source et de la deuxième source.Thus, the part of the invention may comprise an area with a variable light transmission coefficient made transparent to the ignition of the second source, as well as another area with a variable light transmission coefficient made transparent at the moment of ignition of the light source. the first source, these two areas being made opaque or reflective at the extinction of the first source and the second source.

Claims (15)

Pièce (4) d'un dispositif d'éclairage et/ou de signalisation (1) pour véhicule automobile, cette pièce (4) étant agencée pour être visible depuis l'extérieur du dispositif lorsque cette pièce est montée sur ce dispositif, caractérisée en ce qu'elle comprend une première zone (8) présentant un coefficient de transmission lumineuse variable.Part (4) of a lighting and / or signaling device (1) for a motor vehicle, this part (4) being arranged to be visible from the outside of the device when this part is mounted on this device, characterized in that that it comprises a first zone (8) having a variable light transmittance. Pièce selon la revendication 1, délimitée par une face interne (12) et une face externe (13) et dans laquelle la première zone (8) couvre l'intégralité d'au moins une desdites faces.Part according to claim 1, delimited by an inner face (12) and an outer face (13) and wherein the first zone (8) covers the entirety of at least one of said faces. Pièce selon la revendication 1, délimitée par une face interne (12) et une face externe (13) et dans laquelle la première zone (8) couvre partiellement une desdites faces de sorte à délimiter une deuxième zone (9) distincte de la première zone (8), la deuxième zone (9) présentant un coefficient de transmission lumineuse invariable.Piece according to claim 1, delimited by an inner face (12) and an outer face (13) and wherein the first zone (8) partially covers one of said faces so as to delimit a second zone (9) distinct from the first zone (8), the second zone (9) having an invariable light transmission coefficient. Pièce selon la revendication 3, dans laquelle la première zone (8) couvre entre 10% et 90% de la face concernée.Part according to claim 3, wherein the first zone (8) covers between 10% and 90% of the face concerned. Pièce selon l'une quelconque des revendications 3 ou 4, dans laquelle la première zone (8) couvre une périphérie de la face concernée.Part according to any one of claims 3 or 4, wherein the first zone (8) covers a periphery of the face concerned. Pièce selon l'une quelconque des revendications 2 à 5, dans laquelle la variabilité du coefficient de transmission lumineuse de la première zone (8) est opérée par un dispositif électrochromique (11).Part according to any one of claims 2 to 5, wherein the variability of the light transmission coefficient of the first zone (8) is operated by an electrochromic device (11). Pièce selon la revendication 6, dans laquelle le dispositif électrochromique (11) prend la forme d'une couche solidaire de la face concernée.Part according to claim 6, wherein the electrochromic device (11) takes the form of a layer integral with the face in question. Pièce selon l'une quelconque des revendications 6 à 7, dans laquelle le dispositif électrochromique (11) est apposé sur la face interne (12) de la pièce (4).Part according to any one of claims 6 to 7, wherein the electrochromic device (11) is affixed to the inner face (12) of the part (4). Pièce selon l'une quelconque des revendications précédentes, dans laquelle la pièce est un élément transparent ou translucide constitutif du dispositif, notamment une glace.Part according to any one of the preceding claims, wherein the part is a transparent or translucent element constituting the device, in particular an ice. Dispositif d'éclairage et/ou de signalisation (1) comprenant une première source (5) émettrice d'un faisceau lumineux (6) installée dans un volume interne (3) délimité par un boîtier (2) et une pièce (4) selon l'une quelconque des revendications précédentes.Lighting and / or signaling device (1) comprising a first source (5) emitting a light beam (6) installed in an internal volume (3) delimited by a housing (2) and a workpiece (4) according to any of preceding claims. Dispositif selon la revendication 10, dans lequel le faisceau lumineux (6) croise la première zone (8).Device according to Claim 10, in which the light beam (6) crosses the first zone (8). Dispositif selon l'une quelconque des revendications 10 ou 11, dans lequel le faisceau lumineux (6) croise une deuxième zone (9) distincte de la première zone (8), la deuxième zone (9) présentant un coefficient de transmission lumineuse invariable.Device according to any one of claims 10 or 11, wherein the light beam (6) intersects a second zone (9) separate from the first zone (8), the second zone (9) having an invariable light transmission coefficient. Dispositif selon l'une quelconque des revendications 10 à 12, comprenant une deuxième source (17) émettrice d'un faisceau lumineux, ladite première zone (8) étant installée au droit du faisceau lumineux émis par la deuxième source (17).Device according to any one of claims 10 to 12, comprising a second source (17) emitting a light beam, said first zone (8) being installed in line with the light beam emitted by the second source (17). Dispositif selon l'une quelconque des revendications 10 à 13, dans lequel la variabilité du coefficient de transmission lumineuse de la première zone (8) est opérée par un dispositif électrochromique (11) dont l'opacité ou la réflectivité est activée lorsque la première source (5) est éteinte.Device according to any one of claims 10 to 13, wherein the variability of the light transmission coefficient of the first zone (8) is operated by an electrochromic device (11) whose opacity or reflectivity is activated when the first source (5) is off. Dispositif selon l'une quelconque des revendications 10 à 14, apte à être monté adjacent à une carrosserie (16) d'un véhicule, ladite carrosserie présentant une teinte, caractérisé en ce que la variabilité du coefficient de transmission lumineuse de la première zone (8) est opérée par un dispositif électrochromique (11) comprenant des particules d'une teinte identique à celle de la carrosserie (16).Device according to any one of claims 10 to 14, able to be mounted adjacent to a body (16) of a vehicle, said body having a hue, characterized in that the variability of the light transmission coefficient of the first zone ( 8) is operated by an electrochromic device (11) comprising particles of a hue identical to that of the body (16).
EP11184082A 2010-10-12 2011-10-06 Glass of a lighting and/or signalling device with variable light-transmission coefficient Withdrawn EP2442016A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1058296A FR2965889B1 (en) 2010-10-12 2010-10-12 LIGHTING AND / OR SIGNALING DEVICE ICE WITH VARIABLE LIGHT TRANSMISSION COEFFICIENT

Publications (2)

Publication Number Publication Date
EP2442016A2 true EP2442016A2 (en) 2012-04-18
EP2442016A3 EP2442016A3 (en) 2012-08-08

Family

ID=44146873

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11184082A Withdrawn EP2442016A3 (en) 2010-10-12 2011-10-06 Glass of a lighting and/or signalling device with variable light-transmission coefficient

Country Status (2)

Country Link
EP (1) EP2442016A3 (en)
FR (2) FR2965889B1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3041070A1 (en) * 2015-09-14 2017-03-17 Peugeot Citroen Automobiles Sa VEHICLE PROJECTOR
CN106796006A (en) * 2014-07-23 2017-05-31 美泰克太平洋公司 Fog lamp lenses and sub-assembly
CN108844039A (en) * 2018-06-08 2018-11-20 华域视觉科技(上海)有限公司 A kind of car light multifunctional ligand photo structure and light distributing method
CN110873315A (en) * 2018-08-13 2020-03-10 现代自动车株式会社 Lighting device for vehicle
WO2020108277A1 (en) * 2018-11-29 2020-06-04 深圳市绎立锐光科技开发有限公司 Light source system and illumination apparatus
DE102022213766A1 (en) * 2022-12-16 2024-06-27 Volkswagen Aktiengesellschaft Lighting device for a vehicle for fulfilling a lighting function of the vehicle and method for operating a lighting device for a vehicle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT516080B1 (en) 2014-07-28 2016-04-15 Zizala Lichtsysteme Gmbh Cover for a lighting device
FR3059082B1 (en) * 2016-11-21 2019-07-12 Peugeot Citroen Automobiles Sa ZONED SCREEN LIGHTING DEVICE HAVING DIFFERENT LIGHT TRANSMISSION COEFFICIENTS

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2590965B1 (en) * 1985-11-29 1989-02-17 Cibie Projecteurs TWO-LIGHT SIGNAL LIGHT FOR VEHICLE SUCH AS A MOTOR VEHICLE
FR2605086B1 (en) * 1986-10-10 1991-03-15 Cibie Projecteurs LIGHTING DEVICES WITH ELECTROCHROMIC SCREEN, PARTICULARLY FOR MOTOR VEHICLES
JPS63129903U (en) * 1987-02-18 1988-08-25
DE8812322U1 (en) * 1988-09-29 1988-12-08 Rohrer, Emil, 8901 Königsbrunn Covering lighting equipment on motor vehicles
US6491416B1 (en) * 2001-05-25 2002-12-10 Illume, L.L.C. Headlight masking method and apparatus
DE20316660U1 (en) * 2003-10-29 2003-12-24 Rank, Franz Car has components, especially indicator or brake lights or head lamps, with surface layer whose color and optical density can be altered by adjusting electric field on electrochromic layer
DE102005058127A1 (en) * 2005-11-30 2007-06-06 Schefenacker Vision Systems Germany Gmbh Vehicle lamp e.g. motor vehicle rear lamp, has translucent mediums that are nontransparent in radiating direction of light which is transmitted from illuminants in translucent manner and in opposite direction of light
KR20090009465A (en) * 2007-07-20 2009-01-23 기아자동차주식회사 LED lamp light distribution control device and method using smart glass
FR2927858B1 (en) * 2008-02-26 2010-06-04 Peugeot Citroen Automobiles Sa LIGHTING PROJECTOR WITH CONTROLLED OCCULTATION FOR MOTOR VEHICLE.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106796006A (en) * 2014-07-23 2017-05-31 美泰克太平洋公司 Fog lamp lenses and sub-assembly
EP3172486A4 (en) * 2014-07-23 2018-03-28 Myotek Pacific Corp. Fog lamp lens and assembly
US10240741B2 (en) 2014-07-23 2019-03-26 Myotek Holdings, Inc. Fog lamp lens and assembly
CN106796006B (en) * 2014-07-23 2020-06-12 美泰克太平洋公司 Fog lamp lens and assembly
FR3041070A1 (en) * 2015-09-14 2017-03-17 Peugeot Citroen Automobiles Sa VEHICLE PROJECTOR
CN108844039A (en) * 2018-06-08 2018-11-20 华域视觉科技(上海)有限公司 A kind of car light multifunctional ligand photo structure and light distributing method
CN110873315A (en) * 2018-08-13 2020-03-10 现代自动车株式会社 Lighting device for vehicle
WO2020108277A1 (en) * 2018-11-29 2020-06-04 深圳市绎立锐光科技开发有限公司 Light source system and illumination apparatus
DE102022213766A1 (en) * 2022-12-16 2024-06-27 Volkswagen Aktiengesellschaft Lighting device for a vehicle for fulfilling a lighting function of the vehicle and method for operating a lighting device for a vehicle

Also Published As

Publication number Publication date
FR3025288B1 (en) 2018-08-24
FR2965889A1 (en) 2012-04-13
FR3025288A1 (en) 2016-03-04
EP2442016A3 (en) 2012-08-08
FR2965889B1 (en) 2016-01-08

Similar Documents

Publication Publication Date Title
FR3025288A1 (en) LIGHTING AND / OR SIGNALING DEVICE ICE WITH VARIABLE LIGHT TRANSMISSION COEFFICIENT
EP2861421B1 (en) Vitrous roof endowed with lighting devices
FR2964069A1 (en) DEVICE FOR LIGHTING AND / OR SIGNALING WITH MOBILE DIURN ELEMENT
EP0046717B1 (en) Screen with integrated signalling arrangement for a vehicle and process for its production
BE1020716A3 (en) GLASS ROOF COMPRISING MEANS FOR LIGHTING AND CONTROL OF THE LIGHT TRANSMISSION.
EP2776243B1 (en) Motor vehicle with turn signal repeater glazing
EP3059120B1 (en) Lighting device for a motor vehicle
EP1213208B1 (en) Vehicle body part combined with a lighting device
EP2776261A1 (en) Light-signaling glazing for a vehicle
EP1654912A1 (en) Luminous element comprising at least one substrate and a light-emitting coating
FR2979414A1 (en) Transparent element for closing case of e.g. headlight for car, has circular openings formed for passage of air flow, where element is traversed by light generated by light source that is installed in case
EP0465330A1 (en) Headlamp with several functions, especially for vehicles
EP0632228B1 (en) Styling or optical element having a shining aspect and a neutral colour- for vehicle headlamps or lamps for signalling
FR2989176A1 (en) Luminous glazing pane for arrangement in part of car, has micro-reflector arranged relative to extracting zone and reflecting visible and/or UV light reflected from glass sheets according to given direction
FR2738783A1 (en) Lighting and signalling assembly fitted into rear window of motor vehicle
FR2927858A1 (en) Illuminating headlight for motor vehicle, has intermittent screen housed in case and interposed in fixed position on path of light beam delivered by optical module for blocking or releasing path when headlight is not in or in service
FR2605086A1 (en) Lighting devices with electrochromic screen, in particular for motor vehicles
FR3048486A1 (en) OPTICAL BLOCK FOR A MOTOR VEHICLE COMPRISING A COMPLETELY DISSIMULABLE LUMINOUS DEVICE
EP0230834A1 (en) Signalling lamps with coloured lighting for a motor vehicle
FR2590965A1 (en) Signalling light with two states of illumination for a vehicle such as a motor vehicle
FR2487041A1 (en) Vehicle signalling and illumination lamp - has internal coloured screen and deflector plate reflecting sunlight positioned in front of latter
FR2611859A1 (en) PROJECTOR WITH TUBULAR INTERIOR COVER, PARTICULARLY FOR MOTOR VEHICLE
FR2901597A1 (en) Lighting/signalling device e.g. headlight, for motor vehicle, has lens including inner face portions covered with metallization layer and located near junction of lens with case, and screen carrying non-metalized parts creating light form
FR2937118A1 (en) LIGHTING AND / OR SIGNALING DEVICE FOR A MOTOR VEHICLE.
FR2973099A1 (en) LIGHTING AND / OR SIGNALING DEVICE COMPRISING A HEATING ELEMENT WITH A DISSIPATOR

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

RIC1 Information provided on ipc code assigned before grant

Ipc: F21W 101/10 20060101ALN20120702BHEP

Ipc: F21V 11/16 20060101ALI20120702BHEP

Ipc: F21V 9/08 20060101AFI20120702BHEP

Ipc: F21S 8/10 20060101ALI20120702BHEP

Ipc: F21V 9/10 20060101ALI20120702BHEP

17P Request for examination filed

Effective date: 20130204

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20190925