EP3339726B1 - Lens of motor vehicle headlight with overmoulded thermoplastic electrodes - Google Patents

Lens of motor vehicle headlight with overmoulded thermoplastic electrodes Download PDF

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Publication number
EP3339726B1
EP3339726B1 EP17205677.2A EP17205677A EP3339726B1 EP 3339726 B1 EP3339726 B1 EP 3339726B1 EP 17205677 A EP17205677 A EP 17205677A EP 3339726 B1 EP3339726 B1 EP 3339726B1
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EP
European Patent Office
Prior art keywords
electrodes
outer lens
electrically conductive
electrode
edges
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EP17205677.2A
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German (de)
French (fr)
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EP3339726A1 (en
Inventor
Stéphane Bailly
François GRATECAP
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Valeo Vision SAS
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Valeo Vision SAS
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    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/90—Heating arrangements
    • 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
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/60—Heating of lighting devices, e.g. for demisting
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/84—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields

Definitions

  • the invention relates to the field of lighting and light signaling, in particular for motor vehicles. More specifically, the invention relates to the field of luminous devices, in particular for motor vehicles, comprising a housing and a glass for closing said housing.
  • the published patent document JPH10109587A shows a vehicle lighting device comprising an electric de-icing resistor placed on the glass and connected to a metal terminal for connection to an electric power supply.
  • the published patent document US 2014/0332518 A1 discloses a motor vehicle headlight glass, comprising on its inner face an electrically conductive coating intended to serve as electrical resistance for defrosting the glass.
  • the coating forms one or more metal tracks deposited on the ice.
  • Metal electrodes are arranged at two opposite ends of the zone of the metal tracks so as to allow a homogeneous distribution of the supply current for the defrosting to the different tracks.
  • the electrodes are fixed and connected to the metal tracks by solder or by a conductive adhesive. Each of these electrodes is at a distance from the edges of the glass and is intended to be connected to an electrical power supply.
  • this teaching does not specify how this connection is made.
  • the published patent document DE 20 2012 005 908 U also discloses a headlight glass for a motor vehicle.
  • the ice comprises, on its outer face this time, an electrically conductive coating in order to form an electrical resistance for defrosting said ice.
  • the coating forms an apparently continuous layer comprising carbon nanotubes.
  • a protective varnish is deposited on the electrically conductive coating in order to protect it.
  • the electrical connection of the electrically conductive coating is not detailed in this teaching.
  • this teaching is specifically limited to an electrically conductive coating placed on the outer face of the ice, with a view to defrosting it in winter.
  • the published patent document US 2007/0181565 A1 discloses, similarly to the aforementioned documents, a headlamp glass for a motor vehicle, comprising an electrically conductive coating in order to form an electrical resistance for defrosting said glass.
  • the coating includes a electrically conductive track forming zigzags.
  • the tracks end in a connector arranged on the inner face of a return portion of the crystal.
  • a plug can then be connected to the connector for the power supply of the defrost resistor.
  • This teaching is interesting in that it provides the necessary measures for the electrical connection of the de-icing resistor. These measurements are however limited to an electrical resistance in the form of a track forming zigzags and ending in two terminations to be supplied. These tracks are usually visible.
  • the connector requires the presence of a glass return portion and the connection is necessarily made inside the box.
  • the object of the invention is to propose a solution overcoming at least one drawback of the state of the art, more particularly of the aforementioned state of the art. More precisely still, the invention aims to propose a solution for defrosting a glass of a luminous device which is effective, economical and practical.
  • the subject of the invention is in particular a lens for a luminous device, in particular for a motor vehicle, comprising: a main portion made of transparent plastic material; at least two upper, lower and/or lateral edges, called fastening edges, intended to cooperate with the edges of a casing of the light device; an electrically conductive coating forming an electrical defrost resistor; at least two electrodes electrically connected to the conductive coating; remarkable in that the electrodes are made of electrically conductive thermoplastic material and located on said fixing edges.
  • the edges including the electrodes are top and bottom edges and/or side edges.
  • the electrodes can ensure the contact of the ice with the case.
  • the electrodes are overmoulded by the transparent plastic material.
  • each of the electrodes comprises a connector intended to ensure an electrical supply.
  • each of the connectors comprises at least one electrical pin projecting from the electrode comprising said connector, and a device for engagement with a plug, said device being made of electrically insulating material and said pin(s) being overmolded by the material of the electrode so as to be electrically connected with said electrode.
  • the electrical pin(s) advantageously extend into the material of the electrodes.
  • each of the engagement devices comprises a ring surrounding the corresponding pin or pins, said ring comprising means of mechanical engagement with the plug.
  • the material of the electrodes comprises a polymer matrix of the thermoplastic resin type, preferably polycarbonate, and an electrically conductive filler material, preferably of the fiber, resin and/or particle type.
  • thermoplastic resin is chosen from the group comprising: polycarbonate, polyamide, polyethylene, polyethylene terephthalate, polybutylene terephthalate, polyphthalamide, poly(acrylic acid).
  • the fillers are chosen from the group comprising: nanoparticles, zinc sulphide, carbon-based particles, copper and copper alloy (brass)
  • each of the engagement devices is molded onto the corresponding electrode.
  • the material of the electrodes has a surface resistivity less than or equal to 10 4 ⁇ /cm 2 .
  • the electrically conductive coating covers the electrodes, preferably on an inner face of said crystal.
  • the covering extends over more than 80% of the length of the electrode.
  • the electrically conductive coating is a varnish comprising metal oxides, preferably transparent metal oxides, with a transmission coefficient of at least 90% in the wavelengths of the visible range, conductors which are composed of the following oxides, taken alone or in combination among: zinc oxide doped with aluminum AZO; indium tin oxide ITO; zirconium oxide ZrO2; tantalum oxide Ta2O5; tin oxide doped with antimony ATO. indium and tin oxides.
  • the electrically conductive coating is based on electrically conductive organic material, in particular polyphenylene sulphide or Pedot:PSS. It is recalled that Pedot:Pss is a mixture of two polymers which are poly(3,4-ethylenedioxythiophene) (PEDOT); and sodium polystyrene sulfonate (PSS).
  • the electrically conductive coating forms a continuous film covering at least 30% of the surface of the main portion of the glass.
  • each of the electrodes extends over at least 25% of the length of the edge comprising it.
  • each of the electrodes extends over the thickness of the transparent plastic material adjacent to said electrode.
  • each of the electrodes has a profile with a projection in contact, by cohesion, with the transparent material.
  • the invention also relates to a luminous device, in particular for a motor vehicle, comprising: a casing forming an open cavity; a glass fixed to the case and closing the cavity; at least one light module in the cavity; remarkable in that the ice is in accordance with the invention.
  • the device is advantageously a projector.
  • the invention also relates to a process for producing a glass of a luminous device, in particular of a motor vehicle, noteworthy in that the glass is according to the invention and by the following steps: (a) injection of the transparent plastic material into a mold; (b) injection of the electrically conductive thermoplastic material into the mold in order to produce the electrodes (10).
  • step (b) is carried out while the transparent plastic material is solidified.
  • the two injection steps are reversed.
  • the measures of the invention are advantageous in that they make it possible to carry out in an efficient and economical manner the electric power supply of the ice defrosting function of a lighting device.
  • the fact of placing the electrodes at the fixing edges has a first advantage of arranging them in areas not visible from the outside.
  • the electrodes are located in the opaque zone.
  • This also has a second advantage of being able to make an electrical connection to the outside of the device.
  • the connectors and connection plugs can then be arranged outside the area visible from the outside.
  • the fact of making the electrodes of thermoplastic material makes it possible to make them by injection during the injection of the transparent material. The cost of producing ice can then be reduced.
  • FIG. 1 illustrates an embodiment of a light device according to the invention.
  • FIG. 1 is a vertical longitudinal sectional view when the device is in the normal mounting position on a vehicle.
  • picture 2 is a view along section II-II.
  • the light device 2 comprises a housing 4 forming a cavity 4 1 with an open one, said opening being covered by the glass 6.
  • the housing 4 is advantageously made of plastic material. It may consist of several elements fixed to each other.
  • the ice is transparent and advantageously made of plastic material such as in particular polycarbonate (PC).
  • the crystal 6 comprises a main portion 6 1 intended to be traversed by the light rays of one or more light modules arranged in the cavity of the housing 4. It also comprises upper and lower edges 6 2 intended to cooperate with corresponding edges 4 2 of box 4.
  • the main portion 6 1 of the window 6 advantageously comprises, on its inner face, an electrically conductive coating 8, capable of forming an electrical resistance for defrosting and/or demisting the window 6.
  • This coating is advantageously a continuous coating in the form of a varnish comprising an electrically conductive filler material, such as for example indium-tin oxides.
  • Indium-tin oxide or indium oxide doped with tin or ITO for the English name "Indium tin oxide”
  • Indium-tin oxide is a mixture of indium(III) oxide (In 2 O 3 ) and tin (IV) oxide (SnO 2 ), in the typical mass proportion of 90% of the first and 10% of the second. This compound is colorless and transparent in thin layers.
  • the main characteristic of indium tin oxide is its combination of electrical conductivity and optical transparency.
  • Other conductive filler materials can be considered.
  • the varnish advantageously comprises a transparent polymer matrix based on acrylic; or polyester-based; or based on polymers such as polycarbonate.
  • the electrically conductive coating has a thermal conductivity greater than 10 Wm -1 .K -1 .
  • Thermal conductivity is the energy quantity of heat transferred per unit area and time under a temperature gradient of 1 kelvin per meter.
  • It can be deposited with a thickness of between 1 and 5 ⁇ m, preferably between 2 and 3 ⁇ m.
  • the glass 6 comprises upper and lower edges 6 2 cooperating with corresponding edges 4 2 of the housing 4. These edges, upper and lower, 6 2 comprise electrodes 10 embedded in the plastic material forming the glass 6. It can also be observed that the electrically conductive coating 8 extends vertically until it covers the electrodes 10. The latter are in fact positioned at the level of the edges 6 2 so as to present their internal faces freely, the latter then being able to be in contact directly with the electrically conductive coating 8.
  • the electrodes are made of electrically conductive thermoplastic material.
  • This material may comprise a thermoplastic matrix, such as in particular polycarbonate (PC) or high-density polyethylene (PE-HD), and a filler material providing electrical conduction, such as in particular carbon black.
  • the filler material can also be a resin or fibers.
  • Their surface resistivity can be between 10 1 and 10 4 ⁇ /cm 2 .
  • ESD C 1002 from the company RTP ® .
  • This material includes a poly butylene terephthalate (PBT) base and glass fibers. It has a surface resistivity of less than 10 6 ⁇ /cm 2 .
  • PRE-ELEC ® PE 1202 from the company PREMIX ® .
  • the electrode 10 has a section with a profile with a projection on which the transparent plastic material is overmoulded.
  • a connector 12+14 is arranged on electrode 10. It comprises one or more electric pins 12 protruding from electrode 10 and electrically connected with said electrode 10. It also comprises a device 14 for engagement with a plug (not shown).
  • the latter can be formed by an annular wall made of insulating material and molded over the electrode 10. The annular wall surrounds the pins 12. Means of mechanical engagement can be provided on the annular wall, in order to ensure a retention of plug (not shown).
  • the connector is arranged on its internal face unlike that of the lower edge which is on the external face of the electrode.
  • the connector can be disposed, as desired, on the internal face or on the external face of the electrode.
  • FIG. 2 is a view according to section II-II of the figure 1 , that is to say a rear view of the glass 6.
  • the electrodes 10 are arranged on the upper and lower edges 6 2 , so as to generate a current in an essentially vertical direction along the conductive coating 8. It is however understood that the electrodes 10 can, in an alternative or complementary manner, be arranged on the side edges 6 3 . In this case, the current flowing through the conductive coating 10 will be oriented essentially horizontally. Still alternatively, it is conceivable to provide an electrode on an upper or lower edge 6 2 and another electrode on a side edge 6 3 , the current then being essentially oblique. In other words, different configurations of the electrodes are possible on the edges 6 2 and 6 3 , provided that they allow a current to flow along the conductive coating 8.
  • the realization of the ice which has just been described can be operated as follows.
  • the electrically conductive material is first injected into the zone or zones corresponding to the electrodes.
  • the mold is then configured to be able to inject material into the remaining area corresponding to the rest of the ice cream.
  • the transparent material is then injected into the mould, thus covering and overmolding the electrodes.
  • the transparent material is injected first and then the electrodes are injected when they are in an opaque tinted polymer.
  • the second injection is carried out while the material of the first injection is solidified in order to ensure optimum cohesion between the two materials.
  • the injection may include an additional step of injecting the engagement device with a plug of the connector.
  • This device is advantageously made of an electrically insulating material, that is to say different from that of the electrodes.
  • This additional injection step can then take place after the injection of the electrically conductive material. It can be done before, during or after the injection of the transparent material.
  • the electrically conductive coating is then applied outside the mould, in particular by spraying or spraying.

Description

L'invention a trait au domaine de l'éclairage et de la signalisation lumineuse, notamment pour les véhicules automobiles. Plus précisément, l'invention a trait au domaine des dispositifs lumineux, notamment de véhicule automobile, comprenant un boîtier et une glace de fermeture dudit boîtier.The invention relates to the field of lighting and light signaling, in particular for motor vehicles. More specifically, the invention relates to the field of luminous devices, in particular for motor vehicles, comprising a housing and a glass for closing said housing.

Le document de brevet publié JPH10109587 A montre un dispositif d'éclairage de véhicule comprenant une résistance électrique de dégivrage disposée sur la glace et reliée à une borne métallique pour connexion à une alimentation électrique.The published patent document JPH10109587A shows a vehicle lighting device comprising an electric de-icing resistor placed on the glass and connected to a metal terminal for connection to an electric power supply.

Le document de brevet publié US 2014/0332518 A1 divulgue une glace de projecteur de véhicule automobile, comprenant sur sa face intérieure un revêtement conducteur électriquement destiné à servir de résistance électrique de dégivrage de la glace. Pour ce faire, le revêtement forme une ou plusieurs pistes métalliques déposées sur la glace. Des électrodes métalliques sont disposées à deux extrémités opposées de la zone des pistes métalliques de manière à permettre une distribution homogène du courant d'alimentation pour le dégivrage vers les différentes pistes. Les électrodes sont fixées et connectées aux pistes métalliques par brasure ou par un adhésif conducteur. Chacune de ces électrodes est à distance des bords de la glace et est destinée à être connectée à une alimentation électrique. Cet enseignement ne précise cependant pas de quelle manière cette connexion est réalisée.The published patent document US 2014/0332518 A1 discloses a motor vehicle headlight glass, comprising on its inner face an electrically conductive coating intended to serve as electrical resistance for defrosting the glass. To do this, the coating forms one or more metal tracks deposited on the ice. Metal electrodes are arranged at two opposite ends of the zone of the metal tracks so as to allow a homogeneous distribution of the supply current for the defrosting to the different tracks. The electrodes are fixed and connected to the metal tracks by solder or by a conductive adhesive. Each of these electrodes is at a distance from the edges of the glass and is intended to be connected to an electrical power supply. However, this teaching does not specify how this connection is made.

Le document de brevet publié DE 20 2012 005 908 U divulgue également une glace de projecteur pour véhicule automobile. La glace comprend, sur sa face extérieure cette fois-ci, un revêtement conducteur électriquement en vue de former une résistance électrique de dégivrage de ladite glace. Le revêtement forme une couche en apparence continue et comprenant des nanotubes de carbone. Un vernis de protection est déposé sur le revêtement conducteur électriquement en vue de le protéger. Le raccordement électrique du revêtement conducteur électriquement n'est pas détaillé dans cet enseignement. De plus, cet enseignement se limite spécifiquement à un revêtement conducteur électriquement disposé sur la face extérieure de la glace, en vue de son dégivrage en hiver.The published patent document DE 20 2012 005 908 U also discloses a headlight glass for a motor vehicle. The ice comprises, on its outer face this time, an electrically conductive coating in order to form an electrical resistance for defrosting said ice. The coating forms an apparently continuous layer comprising carbon nanotubes. A protective varnish is deposited on the electrically conductive coating in order to protect it. The electrical connection of the electrically conductive coating is not detailed in this teaching. In addition, this teaching is specifically limited to an electrically conductive coating placed on the outer face of the ice, with a view to defrosting it in winter.

Le document de brevet publié US 2007/0181565 A1 divulgue, similairement aux documents susmentionnés, une glace de projecteur pour véhicule automobile, comprenant un revêtement conducteur électriquement en vue de former une résistance électrique de dégivrage de ladite glace. Le revêtement comprend une piste conductrice électriquement formant des zigzags. Les pistes se terminent par un connecteur disposé sur la face intérieure d'une portion de renvoi de la glace. Une fiche peut alors être connectée au connecteur en vue de l'alimentation électrique de la résistance de dégivrage. Cet enseignement est intéressant en ce qu'il prévoit les mesures nécessaires au branchement électrique de la résistance de dégivrage. Ces mesures sont toutefois limitées à une résistance électrique sous forme de piste formant des zigzags et se terminant par deux terminaisons à alimenter. Ces pistes sont généralement visibles. De plus, le connecteur requiert la présence d'une portion de renvoi de la glace et le branchement se fait nécessairement à l'intérieur du boîtier.The published patent document US 2007/0181565 A1 discloses, similarly to the aforementioned documents, a headlamp glass for a motor vehicle, comprising an electrically conductive coating in order to form an electrical resistance for defrosting said glass. The coating includes a electrically conductive track forming zigzags. The tracks end in a connector arranged on the inner face of a return portion of the crystal. A plug can then be connected to the connector for the power supply of the defrost resistor. This teaching is interesting in that it provides the necessary measures for the electrical connection of the de-icing resistor. These measurements are however limited to an electrical resistance in the form of a track forming zigzags and ending in two terminations to be supplied. These tracks are usually visible. In addition, the connector requires the presence of a glass return portion and the connection is necessarily made inside the box.

L'invention a pour objectif de proposer une solution palliant au moins un inconvénient de l'état de l'art, plus particulièrement de l'état de l'art susmentionné. Plus précisément encore, l'invention a pour objectif de proposer une solution de dégivrage d'une glace de dispositif lumineux qui soit performante, économique et pratique.The object of the invention is to propose a solution overcoming at least one drawback of the state of the art, more particularly of the aforementioned state of the art. More precisely still, the invention aims to propose a solution for defrosting a glass of a luminous device which is effective, economical and practical.

L'invention a en particulier pour objet une glace de dispositif lumineux, notamment de véhicule automobile, comprenant : une portion principale en matériau plastique transparent ; au moins deux bords supérieurs, inférieurs et/ou latéraux, dits de fixation, destinés à coopérer avec les bords d'un boîtier du dispositif lumineux ; un revêtement conducteur électriquement formant une résistance électrique de dégivrage ; au moins deux électrodes reliées électriquement au revêtement conducteur ; remarquable en ce que les électrodes sont en matériau thermoplastique conducteur électriquement et situées sur lesdits bords de fixation.The subject of the invention is in particular a lens for a luminous device, in particular for a motor vehicle, comprising: a main portion made of transparent plastic material; at least two upper, lower and/or lateral edges, called fastening edges, intended to cooperate with the edges of a casing of the light device; an electrically conductive coating forming an electrical defrost resistor; at least two electrodes electrically connected to the conductive coating; remarkable in that the electrodes are made of electrically conductive thermoplastic material and located on said fixing edges.

Les bords comprenant les électrodes sont des bords supérieur et inférieur et/ou des bords latéraux.The edges including the electrodes are top and bottom edges and/or side edges.

Les électrodes peuvent assurer le contact de la glace avec le boîtier.The electrodes can ensure the contact of the ice with the case.

Selon un mode avantageux de l'invention, les électrodes sont surmoulées par le matériau plastique transparent.According to an advantageous mode of the invention, the electrodes are overmoulded by the transparent plastic material.

Selon l'invention, chacune des électrodes comprend un connecteur destiné à assurer une alimentation électrique.According to the invention, each of the electrodes comprises a connector intended to ensure an electrical supply.

Selon l'invention, chacun des connecteurs comprend au moins une broche électrique faisant saillie de l'électrode comprenant ledit connecteur, et un dispositif d'engagement avec une fiche, ledit dispositif étant en matériau isolant électrique et ladite ou lesdites broches étant surmoulées par le matériau de l'électrode de manière être reliées électriquement avec ladite électrode. La ou les broches électriques s'étendent avantageusement dans le matériau des électrodes.According to the invention, each of the connectors comprises at least one electrical pin projecting from the electrode comprising said connector, and a device for engagement with a plug, said device being made of electrically insulating material and said pin(s) being overmolded by the material of the electrode so as to be electrically connected with said electrode. The electrical pin(s) advantageously extend into the material of the electrodes.

Selon un mode avantageux de l'invention, chacun des dispositifs d'engagement comprend un anneau entourant la ou les broches correspondantes, ledit anneau comprenant des moyens d'engagement mécanique avec la fiche.According to an advantageous embodiment of the invention, each of the engagement devices comprises a ring surrounding the corresponding pin or pins, said ring comprising means of mechanical engagement with the plug.

Selon un mode avantageux de l'invention, le matériau des électrodes comprend une matrice polymère de type résine thermoplastique, préférentiellement du polycarbonate, et un matériau de charge conducteur électriquement, préférentiellement du type fibres, résine et/ou particules.According to an advantageous embodiment of the invention, the material of the electrodes comprises a polymer matrix of the thermoplastic resin type, preferably polycarbonate, and an electrically conductive filler material, preferably of the fiber, resin and/or particle type.

En particulier, la résine thermoplastique est choisie dans le groupe comprenant : polycarbonate, polyamide, polyéthylène, polyéthylène téréphtalate, polybutylène téréphtalate, polyphtalamide, poly(acide acrylique).In particular, the thermoplastic resin is chosen from the group comprising: polycarbonate, polyamide, polyethylene, polyethylene terephthalate, polybutylene terephthalate, polyphthalamide, poly(acrylic acid).

En particulier, les charges sont choisies dans le groupe comprenant : nano particules, sulfure de zinc, particules à base de carbone, cuivre et alliage de cuivre (laiton)In particular, the fillers are chosen from the group comprising: nanoparticles, zinc sulphide, carbon-based particles, copper and copper alloy (brass)

Selon un mode avantageux de l'invention, chacun des dispositifs d'engagement est surmoulé sur l'électrode correspondante.According to an advantageous embodiment of the invention, each of the engagement devices is molded onto the corresponding electrode.

Selon un mode avantageux de l'invention, le matériau des électrodes présente une résistivité de surface inférieure ou égale à 104 Ω/cm2.According to an advantageous embodiment of the invention, the material of the electrodes has a surface resistivity less than or equal to 10 4 Ω/cm 2 .

Selon un mode avantageux de l'invention, le revêtement conducteur électriquement recouvre les électrodes, préférentiellement sur une face intérieure de ladite glace. Le recouvrement s'étend sur plus de 80% de la longueur de l'électrode.According to an advantageous mode of the invention, the electrically conductive coating covers the electrodes, preferably on an inner face of said crystal. The covering extends over more than 80% of the length of the electrode.

Selon un mode avantageux de l'invention, le revêtement conducteur électrique est un vernis comprenant des oxydes métalliques, préférentiellement des oxydes métalliques transparents, avec un coefficient de transmission d'au moins 90% dans les longueurs d'ondes du domaine visible, conducteurs qui sont composés des oxydes suivants, pris seuls ou en combinaison parmi : oxyde de zinc dopé à l'aluminium AZO ; oxyde d'indium étain ITO ; oxyde de zirconium ZrO2 ; oxyde de tantale Ta2O5 ; oxyde d'étain dopé à l'antimoine ATO. oxydes d'indium et d'étain. Alternativement, le revêtement conducteur électrique est à base de matière organique électriquement conductrice, notamment du polysulfure de phénylène ou du Pedot :PSS. On rappelle que le Pedot:Pss est un mélange de deux polymères qui sont le poly(3,4-éthylènedioxythiophène) (PEDOT) ; et le polystyrène sulfonate) de sodium (PSS).According to an advantageous embodiment of the invention, the electrically conductive coating is a varnish comprising metal oxides, preferably transparent metal oxides, with a transmission coefficient of at least 90% in the wavelengths of the visible range, conductors which are composed of the following oxides, taken alone or in combination among: zinc oxide doped with aluminum AZO; indium tin oxide ITO; zirconium oxide ZrO2; tantalum oxide Ta2O5; tin oxide doped with antimony ATO. indium and tin oxides. Alternatively, the electrically conductive coating is based on electrically conductive organic material, in particular polyphenylene sulphide or Pedot:PSS. It is recalled that Pedot:Pss is a mixture of two polymers which are poly(3,4-ethylenedioxythiophene) (PEDOT); and sodium polystyrene sulfonate (PSS).

Avantageusement, le revêtement conducteur électriquement forme un film continu recouvrant au moins 30% de la surface de la portion principale de la glace.Advantageously, the electrically conductive coating forms a continuous film covering at least 30% of the surface of the main portion of the glass.

On notera que le revêtement couvre de préférence toute l'étendue de la surface intérieure de la glace transparente. il peut aussi n'est couvrir qu'une partie :

  • si la forme de la glace empêche de réaliser le dépôt dans certaines zones, en fonction des techniques de dépôt retenues ;
  • si l'on souhaite restreindre le dépôt aux zones de la glace dans lesquelles le phénomène de condensation se produit en situation de fonctionnement réel du dispositif d'éclairage et/ou signalisation auquel est destinée ladite glace, zones pouvant être déterminées par simulation thermique ou par observation lors des phases de mise au point du dispositif d'éclairage et du véhicule dans lequel il est intégré.
It will be noted that the coating preferably covers the entire extent of the inner surface of the transparent crystal. it can also only cover a part:
  • if the shape of the ice prevents deposition in certain areas, depending on the deposition techniques adopted;
  • if it is desired to restrict the deposition to areas of the glass in which the condensation phenomenon occurs in a real operating situation of the lighting and/or signaling device for which said glass is intended, areas which can be determined by thermal simulation or by observation during the development phases of the lighting device and the vehicle in which it is integrated.

Selon un mode avantageux de l'invention, chacune des électrodes s'étend sur au moins 25% de la longueur du bord la comprenant.According to an advantageous embodiment of the invention, each of the electrodes extends over at least 25% of the length of the edge comprising it.

Selon un mode avantageux de l'invention, chacune des électrodes s'étend sur l'épaisseur du matériau plastique transparent adjacent à ladite électrode.According to an advantageous mode of the invention, each of the electrodes extends over the thickness of the transparent plastic material adjacent to said electrode.

Avantageusement, chacune des électrodes présente un profil avec un ressaut en contact, par cohésion, avec le matériau transparent.Advantageously, each of the electrodes has a profile with a projection in contact, by cohesion, with the transparent material.

L'invention a également pour objet un dispositif lumineux, notamment de véhicule automobile, comprenant : un boîtier formant une cavité ouverte ; une glace fixée au boîtier et refermant la cavité ; au moins un module lumineux dans la cavité ; remarquable en ce que la glace est conforme à l'invention. Le dispositif est avantageusement un projecteur.The invention also relates to a luminous device, in particular for a motor vehicle, comprising: a casing forming an open cavity; a glass fixed to the case and closing the cavity; at least one light module in the cavity; remarkable in that the ice is in accordance with the invention. The device is advantageously a projector.

L'invention a également pour objet un procédé de réalisation d'une glace de dispositif lumineux, notamment de véhicule automobile, remarquable en ce que la glace est selon l'invention et par les étapes suivantes : (a) injection du matériau plastique transparent dans un moule; (b) injection du matériau thermoplastique conducteur électriquement dans le moule en vue de réaliser les électrodes (10).The invention also relates to a process for producing a glass of a luminous device, in particular of a motor vehicle, noteworthy in that the glass is according to the invention and by the following steps: (a) injection of the transparent plastic material into a mold; (b) injection of the electrically conductive thermoplastic material into the mold in order to produce the electrodes (10).

Selon un mode avantageux de l'invention, l'étape (b) est réalisée alors que le matériau plastique transparent est solidifié.According to an advantageous mode of the invention, step (b) is carried out while the transparent plastic material is solidified.

Selon une variante, les deux étapes d'injection ont inversées.According to a variant, the two injection steps are reversed.

Les mesures de l'invention sont intéressantes en ce qu'elles permettent de réaliser de manière performante et économique l'alimentation électrique de la fonction de dégivrage de la glace d'un dispositif lumineux. En effet, le fait de placer les électrodes au niveau des bords de fixation présente un premier avantage de les disposer dans des zones non visibles depuis l'extérieur. De même, dans le cadre de glaces bicolore, avec zone centrale transparente et collerette périphérique opaque, les électrodes sont situées dans la zone opaque.The measures of the invention are advantageous in that they make it possible to carry out in an efficient and economical manner the electric power supply of the ice defrosting function of a lighting device. Indeed, the fact of placing the electrodes at the fixing edges has a first advantage of arranging them in areas not visible from the outside. Similarly, in the context of two-tone lenses, with a transparent central zone and an opaque peripheral collar, the electrodes are located in the opaque zone.

Cela présente également un deuxième avantage de pouvoir réaliser une liaison électrique vers l'extérieur du dispositif. Les connecteurs et fiches de connexion peuvent alors être disposés en dehors de la zone visible depuis l'extérieur. Le fait de réaliser les électrodes en matériau thermoplastique permet de les réaliser par injection lors de l'injection de la matière transparente. Le coût de production de la glace peut alors être réduit.This also has a second advantage of being able to make an electrical connection to the outside of the device. The connectors and connection plugs can then be arranged outside the area visible from the outside. The fact of making the electrodes of thermoplastic material makes it possible to make them by injection during the injection of the transparent material. The cost of producing ice can then be reduced.

D'autres caractéristiques et avantages de la présente invention seront mieux compris à l'aide de la description et des dessins parmi lesquels :

  • La figure 1 est une vue en coupe suivant un plan longitudinal et vertical d'un boîtier de dispositif lumineux, avec un glace conforme à l'invention ;
  • La figure 2 est une vue du boîtier de la figure 1 suivant la coupe II-II.
Other characteristics and advantages of the present invention will be better understood using the description and the drawings, among which:
  • There figure 1 is a sectional view along a longitudinal and vertical plane of a light device housing, with a lens according to the invention;
  • There figure 2 is a view of the housing of the figure 1 following section II-II.

Les figures 1 et 2 illustrent un exemple de réalisation d'un dispositif lumineux conforme à l'invention. La figure 1 est une vue en coupe longitudinale verticale lorsque le dispositif est en position normale de montage sur un véhicule. La figure 2 est une vue suivant la coupe II-II.THE figures 1 and 2 illustrate an embodiment of a light device according to the invention. There figure 1 is a vertical longitudinal sectional view when the device is in the normal mounting position on a vehicle. There picture 2 is a view along section II-II.

En référence à la figure 1, le dispositif lumineux 2 comprend un boîtier 4 formant une cavité 41 avec une ouverte, ladite ouverture étant couverte par la glace 6. Le boîtier 4 est avantageusement en matériau plastique. Il peut être constitué de plusieurs éléments fixés les uns aux autres. La glace est transparente et avantageusement réalisée en matière plastique comme notamment du polycarbonate (PC). La glace 6 comprend une portion principale 61 destinée à être traversée par les rayons lumineux d'un ou plusieurs modules lumineux disposés dans la cavité du boîtier 4. Elle comprend également des bords supérieurs et inférieurs 62 destinés à coopérer avec des bords correspondants 42 du boîtier 4.With reference to the figure 1 , the light device 2 comprises a housing 4 forming a cavity 4 1 with an open one, said opening being covered by the glass 6. The housing 4 is advantageously made of plastic material. It may consist of several elements fixed to each other. The ice is transparent and advantageously made of plastic material such as in particular polycarbonate (PC). The crystal 6 comprises a main portion 6 1 intended to be traversed by the light rays of one or more light modules arranged in the cavity of the housing 4. It also comprises upper and lower edges 6 2 intended to cooperate with corresponding edges 4 2 of box 4.

La portion principale 61 de la glace 6 comprend, avantageusement sur sa face intérieure, un revêtement conducteur électriquement 8, apte à former une résistance électrique de dégivrage et/ou désembuage de la glace 6. Ce revêtement est avantageusement un revêtement continu sous forme d'un vernis comprenant un matériau de charge conducteur électriquement, comme par exemple des oxydes d'indium-étain. L'oxyde d'indium-étain (ou oxyde d'indium dopé à l'étain ou ITO pour l'appellation anglaise « Indium tin oxide ») est un mélange d'oxyde d'indium(III) (In2O3) et d'oxyde d'étain (IV) (SnO2), dans la proportion massique typique de 90 % du premier et 10 % du second. Ce composé est incolore et transparent en couches minces. La caractéristique principale de l'oxyde d'indium-étain est sa combinaison de conductivité électrique et de transparence optique. D'autres matériaux de charge conducteurs peuvent être envisagés. Le vernis comprend avantageusement une matrice polymère transparente à base d'acrylique ; ou à base de polyester ; ou à base de polymères comme du polycarbonate.The main portion 6 1 of the window 6 advantageously comprises, on its inner face, an electrically conductive coating 8, capable of forming an electrical resistance for defrosting and/or demisting the window 6. This coating is advantageously a continuous coating in the form of a varnish comprising an electrically conductive filler material, such as for example indium-tin oxides. Indium-tin oxide (or indium oxide doped with tin or ITO for the English name "Indium tin oxide") is a mixture of indium(III) oxide (In 2 O 3 ) and tin (IV) oxide (SnO 2 ), in the typical mass proportion of 90% of the first and 10% of the second. This compound is colorless and transparent in thin layers. The main characteristic of indium tin oxide is its combination of electrical conductivity and optical transparency. Other conductive filler materials can be considered. The varnish advantageously comprises a transparent polymer matrix based on acrylic; or polyester-based; or based on polymers such as polycarbonate.

Le revêtement conducteur électriquement a une conductivité thermique supérieure à 10 W.m-1.K-1. On appelle conductivité thermique, l'énergie quantité de chaleur transférée par unité de surface et de temps sous un gradient de température de 1 kelvin par mètre.The electrically conductive coating has a thermal conductivity greater than 10 Wm -1 .K -1 . Thermal conductivity is the energy quantity of heat transferred per unit area and time under a temperature gradient of 1 kelvin per meter.

Il peut être déposé avec une épaisseur comprise entre 1 et 5µm, préférentiellement entre 2 et 3µm.It can be deposited with a thickness of between 1 and 5 μm, preferably between 2 and 3 μm.

Toujours en relation avec la figure 1, on peut observer que la glace 6 comprend des bords supérieur et inférieur 62 coopérant avec des bords correspondants 42 du boîtier 4. Ces bords, supérieur et inférieur, 62 comprennent des électrodes 10 noyées dans la matière plastique formant la glace 6. On peut également observer que le revêtement conducteur électriquement 8 s'étend verticalement jusqu'à recouvrir les électrodes 10. Ces dernières sont en effet positionnées au niveau des bords 62 de manière à présenter librement leurs faces internes, ces dernières pouvant alors être en contact direct avec le revêtement conducteur électriquement 8.Always related to figure 1 , it can be observed that the glass 6 comprises upper and lower edges 6 2 cooperating with corresponding edges 4 2 of the housing 4. These edges, upper and lower, 6 2 comprise electrodes 10 embedded in the plastic material forming the glass 6. It can also be observed that the electrically conductive coating 8 extends vertically until it covers the electrodes 10. The latter are in fact positioned at the level of the edges 6 2 so as to present their internal faces freely, the latter then being able to be in contact directly with the electrically conductive coating 8.

Les électrodes sont réalisées en matériau thermoplastique conducteur électriquement. Ce matériau peut comprendre une matrice thermoplastique, comme notamment du polycarbonate (PC) ou du polyéthylène haute densité (PE-HD), et un matériau de charge assurant la conduction électrique, comme notamment du noir de carbone. Le matériau de charge peut également être une résine ou des fibres. De tels matériaux sont connus en soi de l'homme de métier. Leur résistivité surfacique peut être comprise entre 101 et 104 Ω/cm2. On peut citer à titre d'exemple, c'est-à-dire de manière non limitative, le matériau suivant : ESD C 1002 de la société RTP®. Ce matériau comprend une base de poly butylène téréphtalate (PBT) et des fibres de verre. Il présente une résistivité de surface inférieure à 106 Ω/cm2. Toujours à titre d'exemple non limitatif, on peut également citer le matériau suivant : PRE-ELEC® PE 1202 de la société PREMIX®.The electrodes are made of electrically conductive thermoplastic material. This material may comprise a thermoplastic matrix, such as in particular polycarbonate (PC) or high-density polyethylene (PE-HD), and a filler material providing electrical conduction, such as in particular carbon black. The filler material can also be a resin or fibers. Such materials are known per se to those skilled in the art. Their surface resistivity can be between 10 1 and 10 4 Ω/cm 2 . Mention may be made, by way of example, that is to say in a non-limiting manner, of the following material: ESD C 1002 from the company RTP ® . This material includes a poly butylene terephthalate (PBT) base and glass fibers. It has a surface resistivity of less than 10 6 Ω/cm 2 . Still by way of non-limiting example, mention may also be made of the following material: PRE-ELEC ® PE 1202 from the company PREMIX ® .

Toujours à la figure 1, plus précisément à la zone représentée de manière agrandie dans un cercle, on peut observer les détails de positionnement d'une des électrodes 10 par rapport à la matière de la glace qui est surmoulée. L'électrode 10 présente une section avec un profil avec un ressaut sur lequel le matériau plastique transparent est surmoulé. Un connecteur 12+14 est disposé sur l'électrode 10. Il comprend une ou plusieurs broches électriques 12 faisant saillie de l'électrode 10 et reliées électriquement avec ladite électrode 10. Il comprend également un dispositif 14 d'engagement avec une fiche (non représentée). Ce dernier peut être formé par une paroi annulaire en matériau isolant et surmoulée sur l'électrode 10. La paroi annulaire entoure les broches 12. Des moyens d'engagement mécanique peuvent être prévus sur la paroi annulaire, en vue d'assurer une retenue de la fiche (non représentée). Ce qui vient d'être décrit pour le bord inférieur 62 du dispositif 2 vaut également pour le bord opposé supérieur 62. Sur ce dernier, le connecteur est disposé sur sa face interne contrairement à celui du bord inférieur qui est sur la face externe de l'électrode. Le connecteur peut être disposé, au choix, sur la face interne ou sur la face externe de l'électrode.Always at the figure 1 , more precisely in the area shown enlarged in a circle, one can observe the positioning details of one of the electrodes 10 with respect to the material of the crystal which is overmoulded. The electrode 10 has a section with a profile with a projection on which the transparent plastic material is overmoulded. A connector 12+14 is arranged on electrode 10. It comprises one or more electric pins 12 protruding from electrode 10 and electrically connected with said electrode 10. It also comprises a device 14 for engagement with a plug (not shown). The latter can be formed by an annular wall made of insulating material and molded over the electrode 10. The annular wall surrounds the pins 12. Means of mechanical engagement can be provided on the annular wall, in order to ensure a retention of plug (not shown). What has just been described for the lower edge 6 2 of the device 2 also applies to the upper opposite edge 6 2 . On the latter, the connector is arranged on its internal face unlike that of the lower edge which is on the external face of the electrode. The connector can be disposed, as desired, on the internal face or on the external face of the electrode.

La figure 2 est une vue selon la coupe II-II de la figure 1, c'est-à-dire une vue arrière de la glace 6. On peut constater l'étendue du revêtement conducteur 8 sur essentiellement toute la largeur de la glace, depuis un des bords supérieurs et inférieur 62 jusqu'au bord opposé 62. On peut également observer que chaque électrode 10 s'étend transversalement suivant le bord correspondant 62.There picture 2 is a view according to section II-II of the figure 1 , that is to say a rear view of the glass 6. One can see the extent of the conductive coating 8 over essentially the entire width of the glass, from one of the upper and lower edges 6 2 to the opposite edge 6 2 . It can also be observed that each electrode 10 extends transversely along the corresponding edge 6 2 .

Dans la représentation de la figure 2, les électrodes 10 sont disposées sur les bords supérieur et inférieur 62, de manière à générer un courant suivant une direction essentiellement verticale le long du revêtement conducteur 8. Il est toutefois entendu que les électrodes 10 peuvent, de manière alternative ou complémentaire, être disposées sur les bords latéraux 63. Dans ce cas, le courant parcourant le revêtement conducteur 10 sera orienté essentiellement horizontalement. Encore de manière alternative, il est envisageable de prévoir une électrode sur un bord supérieur ou inférieur 62 et une autre électrode sur un bord latéral 63, le courant étant alors essentiellement oblique. En d'autres termes, différentes configurations des électrodes sont possibles sur les bords 62 et 63, pour autant qu'elles permettent de faire circuler un courant le long du revêtement conducteur 8.In the representation of figure 2 , the electrodes 10 are arranged on the upper and lower edges 6 2 , so as to generate a current in an essentially vertical direction along the conductive coating 8. It is however understood that the electrodes 10 can, in an alternative or complementary manner, be arranged on the side edges 6 3 . In this case, the current flowing through the conductive coating 10 will be oriented essentially horizontally. Still alternatively, it is conceivable to provide an electrode on an upper or lower edge 6 2 and another electrode on a side edge 6 3 , the current then being essentially oblique. In other words, different configurations of the electrodes are possible on the edges 6 2 and 6 3 , provided that they allow a current to flow along the conductive coating 8.

La réalisation de la glace qui vient d'être décrite peut être opérée comme suit. Dans un moule dédicacé avec plusieurs zones d'injection, on injecte d'abord le matériau conducteur électriquement dans la ou les zones correspondant aux électrodes. Le moule est ensuite configuré pour pouvoir injecter de la matière dans la zone restante correspondant au reste de la glace. On injecte alors le matériau transparent dans le moule, recouvrant et surmoulant ainsi les électrodes. De préférence, afin d'éviter des traces de refusion visibles par un observateur extérieur, le matériau transparent est injecté en premier puis on injecte les électrodes quand elles sont dasn un polymère teinté opaque. Avantageusement, la deuxième injection est réalisée alors que le matériau de la première injection est solidifié afin d'assurer une cohésion optimale entre les deux matériaux. Une fois les matériaux injectés refroidis, on peut ouvrir le moule et sortie la glace ainsi formée.The realization of the ice which has just been described can be operated as follows. In a dedicated mold with several injection zones, the electrically conductive material is first injected into the zone or zones corresponding to the electrodes. The mold is then configured to be able to inject material into the remaining area corresponding to the rest of the ice cream. The transparent material is then injected into the mould, thus covering and overmolding the electrodes. Preferably, in order to avoid traces of reflow visible to an outside observer, the transparent material is injected first and then the electrodes are injected when they are in an opaque tinted polymer. Advantageously, the second injection is carried out while the material of the first injection is solidified in order to ensure optimum cohesion between the two materials. Once the injected materials have cooled, the mold can be opened and the ice thus formed can be removed.

L'injection peut comprendre une étape supplémentaire consistant à injecter le dispositif d'engagement avec une fiche du connecteur. Ce dispositif est avantageusement en matériau isolant électriquement, c'est-à-dire différent de celui des électrodes. Cette étape supplémentaire d'injection peut alors avoir lieu après l'injection du matériau conducteur électriquement. Elle peut se faire avant, pendant ou après l'injection du matériau transparent.The injection may include an additional step of injecting the engagement device with a plug of the connector. This device is advantageously made of an electrically insulating material, that is to say different from that of the electrodes. This additional injection step can then take place after the injection of the electrically conductive material. It can be done before, during or after the injection of the transparent material.

Le revêtement conducteur électriquement est ensuite appliqué en dehors du moule, notamment par pulvérisation ou projection.The electrically conductive coating is then applied outside the mould, in particular by spraying or spraying.

Claims (13)

  1. Outer lens (6) for a luminous device (2), in particular for a motor vehicle, said outer lens comprising:
    - a main portion (61) made of transparent plastic material;
    - at least two upper, lower and/or lateral edges (62, 63), referred to as fastening edges, intended to interact with the edges of a housing (4) of the luminous device (2);
    - an electrically conductive coating (8) forming a defrosting electrical resistor;
    - at least two electrodes (10) that are electrically connected to the conductive coating (8);
    characterized in that
    the electrodes (10) are made of electrically conductive thermoplastic material and located on said fastening edges (62), each of the electrodes (10) comprises a connector (12, 14) that is intended to allow electrical power to be supplied and each of the connectors comprises at least one electrical pin (12) that protrudes from the electrode (10) comprising said connector, and a device (14) for engaging with a plug, said device (14) being made of an electrical insulator material and said one or more pins (12) being over-moulded by the material of the electrode so as to be electrically connected to said electrode (10).
  2. Outer lens (6) according to Claim 1, characterized in that the electrodes (10) are over-moulded by the transparent plastic material.
  3. Outer lens (6) according to Claim 1 or 2, characterized in that each of the engaging devices (14) comprises a ring encircling the one or more corresponding pins (12), said ring comprising means for mechanically engaging with the plug.
  4. Outer lens (6) according to one of Claims 1 to 3, characterized in that the material of the electrodes (10) comprises a polymer matrix, preferably polycarbonate, and an electrically conductive filler, preferably fibres, resin and/or particles.
  5. Outer lens (6) according to one of Claims 1 and 3 and according to Claim 4, characterized in that each of the engaging devices (14) is over-moulded onto the corresponding electrode (10).
  6. Outer lens (6) according to one of Claims 1 to 5, characterized in that the material of the electrodes (10) has a surface resistivity lower than or equal to 104 Ω/cm2.
  7. Outer lens (6) according to one of Claims 1 to 6, characterized in that the electrically conductive coating (8) covers the electrodes (10), preferably on an interior face of said outer lens.
  8. Outer lens (6) according to one of Claims 1 to 7, characterized in that the electrically conductive coating (8) is a varnish containing metal oxides, preferably tin and indium oxides.
  9. Outer lens (6) according to one of Claims 1 to 8, characterized in that each of the electrodes (10) extends over at least 50% of the length of one of the edges (62).
  10. Outer lens (6) according to one of Claims 1 to 8, characterized in that each of the electrodes (10) extends over the thickness of the transparent plastic material adjacent to said electrode.
  11. Luminous device (2), in particular for a motor vehicle, said device comprising:
    - a housing (4) forming an open cavity;
    - an outer lens (6) fastened to the housing and closing the cavity;
    - at least one luminous module in the cavity;
    characterized in that
    the outer lens (6) is according to one of Claims 1 to 10.
  12. Process for producing an outer lens (6) for a luminous device (2), in particular for a motor vehicle, said process being characterized in that the outer lens (6) is according to one of Claims 1 to 10 and by the following steps:
    (a) a step in which the transparent plastic material is injected into a mould;
    (b) a step in which the electrically conductive thermoplastic material is injected into the mould with a view to producing electrodes (10).
  13. Process according to Claim 12, characterized in that step (b) is carried out once the transparent material has solidified.
EP17205677.2A 2016-12-20 2017-12-06 Lens of motor vehicle headlight with overmoulded thermoplastic electrodes Active EP3339726B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1662840A FR3060711A1 (en) 2016-12-20 2016-12-20 AUTOMOTIVE PROJECTOR ICE WITH OVERMOULATED THERMOPLASTIC ELECTRODES

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CN109323213A (en) * 2018-11-07 2019-02-12 华域视觉科技(上海)有限公司 The anti-vehicle lamp light-distributing mirror that hazes
US11236884B2 (en) * 2019-09-05 2022-02-01 Aptiv Limited Technologies Vehicle lighting assembly with lens heating device and receptacle connector assembly for same
DE102020121024A1 (en) * 2020-08-10 2022-02-10 Marelli Automotive Lighting Reutlingen (Germany) GmbH Motor vehicle lighting device with heatable cover pane
FR3119010B1 (en) * 2021-01-20 2023-03-17 Psa Automobiles Sa OPTICAL UNIT WITH GLASS DEFINED BY CONTROLLED BI-INJECTION, FOR ONE VEHICLE

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DE4333655C2 (en) * 1993-10-02 2002-11-14 Bayerische Motoren Werke Ag Heater for cover windows of motor vehicle headlights
JPH0899610A (en) * 1994-09-30 1996-04-16 Tsutsunaka Plast Ind Co Ltd Synthetic-resin-made window material having anti-fog performance and manufacture thereof
JPH10109587A (en) * 1996-10-03 1998-04-28 Koito Mfg Co Ltd Vehicular lighting fixture
JP2006032137A (en) * 2004-07-16 2006-02-02 Koito Mfg Co Ltd Lighting fixture for vehicle and manufacturing method of lighting fixture for vehicle
JP2007018981A (en) * 2005-07-11 2007-01-25 Nippon Sheet Glass Co Ltd Terminal mounting structure to window glass
JP5035153B2 (en) * 2008-07-14 2012-09-26 市光工業株式会社 Vehicle lighting

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