EP3081851A1 - Lens for vehicle lighting device, associated manufacturing method and vehicle lighting device comprising such a lens - Google Patents

Lens for vehicle lighting device, associated manufacturing method and vehicle lighting device comprising such a lens Download PDF

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Publication number
EP3081851A1
EP3081851A1 EP16165649.1A EP16165649A EP3081851A1 EP 3081851 A1 EP3081851 A1 EP 3081851A1 EP 16165649 A EP16165649 A EP 16165649A EP 3081851 A1 EP3081851 A1 EP 3081851A1
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EP
European Patent Office
Prior art keywords
ice
microns
region
lighting device
texturing
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Granted
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EP16165649.1A
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German (de)
French (fr)
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EP3081851B1 (en
Inventor
François GRATECAP
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Valeo Vision SAS
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Valeo Vision SAS
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Publication of EP3081851A1 publication Critical patent/EP3081851A1/en
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    • 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
    • F21S45/30—Ventilation or drainage of lighting 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
    • 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

Definitions

  • the present invention relates to an ice for a vehicle lighting device, for example for headlight or rear light of a motor vehicle.
  • lighting devices mounted on vehicles are not perfectly sealed. In fact, under certain conditions, they are subject to condensation phenomena occurring inside the cavity they delimit. These phenomena may result in the appearance of a mist on the inner face of the ice of the lighting device.
  • the invention therefore aims to improve the situation.
  • the invention relates to an ice for a vehicle lighting device, characterized in that it comprises, on at least one region of at least one face of the ice, a microscopic texturing conferring on said region a behavior superhydrophobic.
  • the hydrophobic properties of the ice are obtained less cheaply. Moreover, since these properties result from only geometric properties of the ice, the behavior over time of these properties is improved and the super-hydrophobic behavior of the ice is not subject to saturation phenomena that can occur for varnishes.
  • the microscopic texturing comprises a plurality of studs projecting from said face.
  • the studs have a shape substantially corresponding to a form of the group consisting of: a cylinder shape, a mushroom shape, a tapered shape, a truncated cone or truncated pyramid shape, a form of aggregated spheroids.
  • two neighboring studs being located at a distance from one another of between 5 microns and 50 microns, advantageously between 40 microns and 50 microns, and preferably being 45 microns. This has the effect of minimizing the phenomena of impaling drops on the pads.
  • the pads have a height of between 5 and 50 microns, advantageously between 25 microns and 50 microns, and preferably being 30 microns.
  • the pads have a diameter of between 5 and 50 microns, advantageously between 10 microns and 20 microns, and preferably equal to 15 microns. This also has the effect of preventing the effects of impregnation of the drops of water on the pads, and thus contributes to the good hydrophobicity of the region of the ice having the texturing.
  • the pads are double-scale, that is to say with primary pads structures covered with secondary pads.
  • the microscopic texturing is integral with said region of the ice face. Since the interface between the texturing and the ice does not present a gap, the phenomena of misting between the texturing and the ice are thus prevented.
  • said face is an internal face of the ice.
  • At least said microscopic texturing is made from polycarbonate or polymethylmethacrylate. Texturing microscopic thus has a good mechanical strength and limited susceptibility to chemicals that may be present in the water prevailing within the vehicle lighting devices.
  • the invention also relates to a method for manufacturing an ice as defined above, characterized in that it comprises a step during which, on one side of said ice, at least one region comprising a texturing is formed microscope conferring on said region a super-hydrophobic behavior.
  • the method comprises a step during which, in a region of a surface of a mold, at least one microscopic texturing complementary to a microscopic texturing adapted to confer on a surface a super-hydrophobic behavior, and simultaneously forming said ice and the ice region or regions comprising microscopic texturing by molding in said mold. Because the ice and the super-hydrophobic region (s) are formed simultaneously, the number of steps to achieve an ice according to the invention is limited.
  • the method comprises a step during which an ice is obtained, then forming, on one side of said ice, said region by machining with a laser beam or an ion beam.
  • the invention relates to a vehicle lighting device, characterized in that it comprises an ice as defined above.
  • the lighting device comprises a cavity delimited by said mirror, the lighting device further comprising evacuation means opening into said cavity for discharging condensates located in said cavity, the super behavior Hydrophobic texturing favoring the evacuation of condensates.
  • evacuation means opening into said cavity for discharging condensates located in said cavity, the super behavior Hydrophobic texturing favoring the evacuation of condensates.
  • the evacuation means comprise a discharge orifice opening into said cavity and a suction circuit connected to said discharge orifice. This makes it possible to reliably, robustly and inexpensively evacuate the condensates from the cavity.
  • the Figure 1 illustrates a side view of a lighting device 2 according to the invention.
  • the lighting device 2 is intended to be integrated with a vehicle, for example a car, and is intended to project a light beam away from the vehicle to improve the visibility of the driver, signify the intention of the driver to perform a turn, etc.
  • the lighting device 2 is preferably comprised in the group formed by: a main vehicle headlight, a high beam, a dipped beam, a fog lamp, a daytime running lamp, a direction indicator, a rear light, a lateral signaling device (also called in English language, sidemarker / side reflex).
  • the lighting device 2 comprises a light source 4, means for shaping the light beam coming from the light source 4, for example a reflector 6 or a projection lens, or a combination of reflectors and / or lenses, a case 8 and an ice cream 10.
  • the light source 4 and the reflector 6 are coupled to each other to form and orient the light beam generated by the lighting device 2.
  • the reflector 6 is fixed to a rear wall of the housing 8 (in the sense of the direction of emission of the light beam).
  • the light source 4 is engaged through this wall as well as through the reflector 6.
  • the housing 8 and the ice-cream 10 are fixed to one another and delimit between them an internal cavity 12 of the device 2.
  • the housing 8 is for example made from metal or plastic.
  • the ice 10 has an internal face 14 oriented toward the housing 8 and defining the cavity 12, and an outer face 16 facing away from the device 2.
  • the ice 10 is translucent so as to allow the passage of the light beam generated by the source 4 and the reflector 6.
  • the ice 10 is made from polycarbonate, PC acronym, such as for example Makrolon® AL 2447 sold by the company Bayer, or polymethyl methacrylate, acronym PMMA.
  • PC acronym such as for example Makrolon® AL 2447 sold by the company Bayer
  • PMMA polymethyl methacrylate
  • the ice 10 comprises, on at least one region 18 of one face of the ice 10, a microscopic texturing ( Figures 2a to 2c ) conferring on said region a super-hydrophobic behavior.
  • Super-hydrophobic behavior corresponds to a property of a surface according to which the contact angle ⁇ ( Fig. 2a ) between said surface and a drop of water is greater than or equal to 150 °. This results in the drop of water not sticking to the surface in question and dripping without wetting the surface.
  • a hydrophobic behavior corresponds to a property of a surface according to which the contact angle ⁇ ( Fig. 2a ) between said surface and a drop of water is greater than or equal to 90 °.
  • the microscopic texturing 20 is located on the inner face 14 of the ice 20. This has the particular effect of preventing the formation of a condensation mist on the inner face of the ice 10, which greatly degrades the appearance of the device 2.
  • the microscopic texturing 20 is integral with the corresponding face of the ice 10.
  • the microscopic texturing is preferably carried out from the same material as the remainder of the ice 10, i.e., polycarbonate or polymethyl methacrylate.
  • the microscopic texturing 20 comprises a plurality of studs 22 projecting from the ice 10.
  • the studs 22 have a shape substantially corresponding to a form of the group consisting of: a tapered shape ( Fig. 2a ), a cylinder shape ( Fig. 2b ), a form of mushroom ( Fig. 2c ), a form of truncated cone or truncated pyramid, a form of aggregated spheroids.
  • the cylinder shape of the studs has a circular cross section, polygonal, for example square, rectangular or hexagonal.
  • a mushroom-shaped stud 22 comprises a first portion of cylindrical shape extending from the ice 10, for example of circular or square section, surmounted by a second substantially rounded portion intended to be in contact with drops. of water.
  • the tapered shape corresponds for example to a conical or pyramidal shape whose base is in contact with the ice 10.
  • the studs 22 have a height h of between 5 ⁇ m and 50 ⁇ m, advantageously between 25 ⁇ m and 35 ⁇ m, and preferably being substantially 30 ⁇ m.
  • the pads 22 have a diameter of between 5 microns and 50 microns, preferably between 10 microns and 20 microns, and preferably being substantially 15 microns. Note that the diameter d is measured in the local plane of the ice 10.
  • the pads 22 of a region 18 are regularly distributed within this region 18. Each pad 22 thus has several neighboring pads 22.
  • the distance p separating two adjacent pads 22, or not p pads is between 5 microns and 50 microns, preferably between 40 microns and 50 microns, and is preferably substantially 45 microns.
  • the studs 22 are arranged substantially in a matrix arrangement comprising rows and columns in which the studs 22 are regularly spaced. In this configuration, each stud 22 thus has four neighboring studs 22.
  • all the pads 22 have substantially the same shape and the same dimensions.
  • the pads of a given region 18 therefore all verify one and / or the other of the above conditions.
  • the ice 10 comprises several regions each comprising a microscopic texturing 20 conferring on the corresponding region a super-hydrophobic behavior.
  • ice 10 comprises two regions 18, 18 2 .
  • Each of these regions includes microscopic texturing as described above.
  • the pads 22 of texturations 20 of different regions have different dimensions from one region to another, these dimensions remaining substantially identical within the same region.
  • the choice of the dimensions of the studs 22 within the texturing of a given region is for example made according to criteria such as the impact of the presence of the texturing on the properties of the light beam obtained, as well as the perceptible aesthetic rendering. to the naked eye by an observer of the projector's mirror.
  • the choice of the location of the region or regions having a microscopic texturing is performed according to the so-called "cold" zones on the projector glass, in which the condensation is likely to form, depending on the geometry projector and ice, the arrangement of the various elements inside the headlamp housing, the number and location of ventilation, the number and type of light sources and their distribution. These cold zones are determined by thermal simulation or by observing projectors under real conditions of use.
  • the microscopically textured region (s) 20 extend over a maximum surface of the inner face 14 of the ice 10, for example over an area corresponding to more than 75% of the total surface area. of the inner face of the ice 10.
  • the lighting device 2 comprises evacuation means 24 configured to evacuate the condensates forming in the cavity 12.
  • the evacuation means 24 comprise a discharge orifice 26 formed through one of the walls of the housing 8.
  • the discharge orifice 26 is arranged in the lower part of the rear wall of the housing 8.
  • the evacuation means 24 comprise, in a subsidiary manner, a suction circuit 28 connected to the discharge orifice 26.
  • part of the moisture present in the cavity 12 is condensed in the form of drops 12 on the inner face 14 of the glass 10.
  • the condensed drops on the texture or textures 20 do not hang not to the corresponding region due to the super-hydrophobic behavior of the associated region, and, because of the gravity, flow towards the lower part of the device 2.
  • the suction circuit 28 generates a depression in the cavity 12 and removes moisture from the cavity 12, which prevents the accumulation of moisture in the cavity 12 and thus limits the formation of drops on the ice 10 by condensation.
  • a lighting device ice 2 is obtained, for example by a known method such as molding.
  • microscopic texturing as described above is formed in at least one region of one face of the ice and gives the corresponding region a super-hydrophobic behavior.
  • the microscopic texturing is formed by laser beam machining, or ion beam.
  • a microscopic texturing 20 'complementary to a microscopic texturing described above is carried out.
  • the mold M is made of steel.
  • step S2 ice 10 and ice region (s) 18 including microscopic texturing complementary to microscopic texturing 20 'by molding are simultaneously formed using mold M.

Abstract

Glace (10) pour dispositif d'éclairage de véhicule (2). La glace (10) comporte, sur au moins une région (18, 18 2 ) d'au moins une face (14, 16) de la glace (10), une texturation microscopique (20) conférant à ladite région un comportement super-hydrophobe. Procédé de fabrication associé et dispositif d'éclairage de véhicule comprenant une telle glace.Ice (10) for vehicle lighting device (2). The ice (10) comprises, on at least one region (18, 18 2) of at least one face (14, 16) of the ice (10), a microscopic texturing (20) conferring on said region a superficial behavior. hydrophobic. Associated manufacturing method and vehicle lighting device comprising such ice.

Description

La présente invention concerne une glace pour dispositif d'éclairage de véhicule, par exemple pour phare avant ou arrière de véhicule automobile.The present invention relates to an ice for a vehicle lighting device, for example for headlight or rear light of a motor vehicle.

De manière connue, les dispositifs d'éclairage montés sur des véhicules tels que des automobiles ne sont pas parfaitement étanches. De fait, sous certaines conditions, ils sont sujets à des phénomènes de condensation se produisant à l'intérieur de la cavité qu'ils délimitent. Ces phénomènes peuvent se traduire par l'apparition d'une buée sur la face interne de la glace du dispositif d'éclairage.In known manner, lighting devices mounted on vehicles such as automobiles are not perfectly sealed. In fact, under certain conditions, they are subject to condensation phenomena occurring inside the cavity they delimit. These phenomena may result in the appearance of a mist on the inner face of the ice of the lighting device.

Cette buée dégrade alors substantiellement l'apparence extérieure du dispositif d'éclairage, ce qui est inacceptable aussi bien pour les constructeurs que pour les possesseurs des véhicules correspondants.This mist substantially degrades the external appearance of the lighting device, which is unacceptable for both manufacturers and owners of the corresponding vehicles.

Aussi, afin de remédier à ce problème, il est par exemple envisageable d'enduire la face interne des glaces de ces dispositifs de vernis hydrophobe ou hydrophile, ou encore de disposer d'une surface enduite d'un vernis hydrophile à un autre emplacement dans le dispositif d'éclairage de façon à capter l'humidité qui y règne.Also, in order to remedy this problem, it is possible, for example, to coat the internal face of the glazes with these hydrophobic or hydrophilic varnish devices, or to have a surface coated with a hydrophilic varnish at another location in the lighting device so as to capture the humidity that prevails therein.

Ces solutions présentent toutefois des inconvénients. En effet, ce vernis a à son tour pour effet de dégrader l'apparence du dispositif d'éclairage. En outre, ces vernis présentent une efficacité limitée et ne préviennent pas à eux seuls la formation de buées de condensation sur les glaces. Par ailleurs, ces vernis ont une tenue dans le temps qui n'est pas satisfaisante, et ont un coût élevé.These solutions, however, have disadvantages. Indeed, this varnish has in turn the effect of degrading the appearance of the lighting device. In addition, these varnishes have a limited effectiveness and do not prevent by themselves the formation of condensation on the ice. Moreover, these varnishes have a behavior in time which is not satisfactory, and have a high cost.

L'invention vise donc à améliorer la situation.The invention therefore aims to improve the situation.

A cet effet, l'invention concerne une glace pour dispositif d'éclairage de véhicule, caractérisée en ce qu'elle comporte, sur au moins une région d'au moins une face de la glace, une texturation microscopique conférant à ladite région un comportement super-hydrophobe.For this purpose, the invention relates to an ice for a vehicle lighting device, characterized in that it comprises, on at least one region of at least one face of the ice, a microscopic texturing conferring on said region a behavior superhydrophobic.

Ainsi, il n'est plus nécessaire d'enduire les glaces de vernis, qui est une technique difficile à maîtriser et donc engendrant un taux de rebuts et des retours importants, et dont la mise en oeuvre repose sur des installations chères et volumineuses.Thus, it is no longer necessary to coat the ice with varnish, which is a difficult technique to control and therefore generating a rate of rejects and returns, and whose implementation is based on expensive and bulky installations.

En outre, les propriétés hydrophobes des glaces sont obtenues de manière moins onéreuse. Par ailleurs, du fait que ces propriétés découlent de seules propriétés géométriques de la glace, la tenue dans le temps de ces propriétés est améliorée et le comportement super-hydrophobe de la glace n'est pas sujet à des phénomènes de saturation pouvant se produire pour des vernis.In addition, the hydrophobic properties of the ice are obtained less cheaply. Moreover, since these properties result from only geometric properties of the ice, the behavior over time of these properties is improved and the super-hydrophobic behavior of the ice is not subject to saturation phenomena that can occur for varnishes.

Selon un aspect de l'invention, la texturation microscopique comprend une pluralité de plots en saillie par rapport à la dite face.According to one aspect of the invention, the microscopic texturing comprises a plurality of studs projecting from said face.

Selon un autre aspect de l'invention, les plots présentent une forme correspondant sensiblement à une forme du groupe constitué par : une forme de cylindre, une forme de champignon, une forme effilée, une forme de tronc de cône ou de tronc de pyramide, une forme de sphéroïdes agrégés.According to another aspect of the invention, the studs have a shape substantially corresponding to a form of the group consisting of: a cylinder shape, a mushroom shape, a tapered shape, a truncated cone or truncated pyramid shape, a form of aggregated spheroids.

Dans une réalisation particulière, deux plots voisins étant situés à une distance l'un de l'autre comprise entre 5 µm et 50 µm, avantageusement entre 40 µm et 50 µm, et valant préférentiellement 45 µm. Ceci a notamment pour effet de minimiser les phénomènes d'empalement des gouttes sur les plots.In a particular embodiment, two neighboring studs being located at a distance from one another of between 5 microns and 50 microns, advantageously between 40 microns and 50 microns, and preferably being 45 microns. This has the effect of minimizing the phenomena of impaling drops on the pads.

Selon un mode de réalisation, les plots présentent une hauteur comprise entre 5 et 50 µm, avantageusement entre 25 µm et 50 µm, et valant préférentiellement 30 µm.According to one embodiment, the pads have a height of between 5 and 50 microns, advantageously between 25 microns and 50 microns, and preferably being 30 microns.

Selon un autre aspect de l'invention, les plots présentent un diamètre compris entre 5 et 50 µm, avantageusement entre 10 µm et 20 µm, et valant de préférence 15 µm. Ceci a également pour effet de prévenir les effets d'empalement des gouttes d'eau sur les plots, et contribue donc à la bonne hydrophobie de la région de la glace présentant la texturation.According to another aspect of the invention, the pads have a diameter of between 5 and 50 microns, advantageously between 10 microns and 20 microns, and preferably equal to 15 microns. This also has the effect of preventing the effects of impregnation of the drops of water on the pads, and thus contributes to the good hydrophobicity of the region of the ice having the texturing.

Dans un mode de réalisation, les plots sont à double échelle, c'est-à-dire avec des structures de plots primaire recouverts de plots secondaires.In one embodiment, the pads are double-scale, that is to say with primary pads structures covered with secondary pads.

Dans un mode de réalisation, la texturation microscopique est venue de matière avec ladite région de la face de la glace. Du fait que l'interface entre la texturation et la glace ne présente pas d'interstice, les phénomènes d'immixtion de buée entre la texturation et la glace sont ainsi empêchés.In one embodiment, the microscopic texturing is integral with said region of the ice face. Since the interface between the texturing and the ice does not present a gap, the phenomena of misting between the texturing and the ice are thus prevented.

Selon une réalisation particulière, ladite face est une face interne de la glace.According to a particular embodiment, said face is an internal face of the ice.

En outre, selon un autre aspect de l'invention, au moins ladite texturation microscopique est réalisée à partir de polycarbonate ou de polyméthacrylate de méthyle. La texturation microscopique présente ainsi une bonne tenue mécanique et une susceptibilité limitée aux agents chimiques pouvant être présents dans l'eau régnant au sein des dispositifs d'éclairage de véhicule.In addition, according to another aspect of the invention, at least said microscopic texturing is made from polycarbonate or polymethylmethacrylate. Texturing microscopic thus has a good mechanical strength and limited susceptibility to chemicals that may be present in the water prevailing within the vehicle lighting devices.

L'invention concerne également un procédé de fabrication d'une glace telle que définie ci-dessus, caractérisé en ce qu'il comprend une étape au cours de laquelle, sur une face de ladite glace, on forme au moins une région comprenant une texturation microscopique conférant à ladite région un comportement super-hydrophobe.The invention also relates to a method for manufacturing an ice as defined above, characterized in that it comprises a step during which, on one side of said ice, at least one region comprising a texturing is formed microscope conferring on said region a super-hydrophobic behavior.

Selon un aspect de l'invention, le procédé comprend une étape au cours de laquelle, dans une région d'une surface d'un moule, on réalise au moins une texturation microscopique complémentaire d'une texturation microscopique adaptée pour conférer à une surface un comportement super-hydrophobe, et on forme simultanément ladite glace et la ou les régions de la glace comprenant une texturation microscopique par moulage dans ledit moule. Du fait que la glace et la ou les régions super-hydrophobes sont formées simultanément, on limite le nombre d'étapes à réaliser pour obtenir une glace selon l'invention.According to one aspect of the invention, the method comprises a step during which, in a region of a surface of a mold, at least one microscopic texturing complementary to a microscopic texturing adapted to confer on a surface a super-hydrophobic behavior, and simultaneously forming said ice and the ice region or regions comprising microscopic texturing by molding in said mold. Because the ice and the super-hydrophobic region (s) are formed simultaneously, the number of steps to achieve an ice according to the invention is limited.

Dans un mode de réalisation alternatif, le procédé comprend une étape au cours de laquelle on obtient une glace, puis on forme, sur une face de ladite glace, ladite région par usinage par un faisceau laser ou un faisceau d'ions. Ceci permet d'obtenir de façon simple et fiable une glace super-hydrophobe. En outre, ce procédé présente l'avantage de pouvoir être mis en oeuvre sur des glaces au cours de la vie de ces dernières.In an alternative embodiment, the method comprises a step during which an ice is obtained, then forming, on one side of said ice, said region by machining with a laser beam or an ion beam. This makes it possible to obtain in a simple and reliable way a super-hydrophobic ice cream. In addition, this method has the advantage of being used on ice during the life of the latter.

Par ailleurs, l'invention concerne un dispositif d'éclairage de véhicule, caractérisé en ce qu'il comprend une glace telle que définie ci-dessus.Furthermore, the invention relates to a vehicle lighting device, characterized in that it comprises an ice as defined above.

Dans un mode de réalisation, le dispositif d'éclairage comprend une cavité délimitée par ladite glace, le dispositif d'éclairage comprenant en outre des moyens d'évacuation débouchant dans ladite cavité pour l'évacuation de condensats situés dans ladite cavité, le comportement super-hydrophobe de la texturation favorisant l'évacuation des condensats. La présence des moyens d'évacuation permet alors de limiter de façon générale la formation de condensation sur la glace du fait de l'accumulation d'humidité dans le dispositif d'éclairage.In one embodiment, the lighting device comprises a cavity delimited by said mirror, the lighting device further comprising evacuation means opening into said cavity for discharging condensates located in said cavity, the super behavior Hydrophobic texturing favoring the evacuation of condensates. The presence of the evacuation means then makes it possible to generally limit the formation of condensation on the ice because of the accumulation of moisture in the lighting device.

Selon un autre aspect de l'invention, les moyens d'évacuation comprennent un orifice d'évacuation débouchant dans ladite cavité et un circuit d'aspiration connecté audit orifice d'évacuation. Ceci permet d'évacuer de façon fiable, robuste et peu onéreuse les condensats de la cavité.According to another aspect of the invention, the evacuation means comprise a discharge orifice opening into said cavity and a suction circuit connected to said discharge orifice. This makes it possible to reliably, robustly and inexpensively evacuate the condensates from the cavity.

L'invention sera mieux comprise à la lecture de la description détaillée qui va suivre, donnée uniquement à titre d'exemple, et faite en référence aux Figures annexées, sur lesquelles :

  • La Figure 1 illustre un dispositif d'éclairage selon l'invention ;
  • Les Figures 2a à 2c illustrent différentes formes de plots d'une glace selon l'invention ; et
  • Les Figures 3a et 3b illustrent deux modes de réalisation d'un procédé de fabrication d'une glace selon l'invention ; et
  • La Figure 4 illustre un moule employé dans le mode de réalisation du procédé de la Figure 3b.
The invention will be better understood on reading the detailed description which follows, given solely by way of example, and with reference to the appended figures, in which:
  • The Figure 1 illustrates a lighting device according to the invention;
  • The Figures 2a to 2c illustrate different forms of pads of an ice according to the invention; and
  • The Figures 3a and 3b illustrate two embodiments of a method of manufacturing an ice according to the invention; and
  • The Figure 4 illustrates a mold used in the embodiment of the process of the Figure 3b .

La Figure 1 illustre une vue de profil d'un dispositif d'éclairage 2 selon l'invention.The Figure 1 illustrates a side view of a lighting device 2 according to the invention.

Le dispositif d'éclairage 2 est destiné à être intégré à un véhicule, par exemple une voiture, et est destiné à projeter un faisceau lumineux à l'écart du véhicule pour améliorer la visibilité du conducteur, signifier l'intention du conducteur d'effectuer un virage, etc.The lighting device 2 is intended to be integrated with a vehicle, for example a car, and is intended to project a light beam away from the vehicle to improve the visibility of the driver, signify the intention of the driver to perform a turn, etc.

Le dispositif d'éclairage 2 est préférentiellement compris dans le groupe formé par : un projecteur principal de véhicule, un feu de route, un feu de croisement, un feu antibrouillard, un feu de signalisation diurne, un indicateur de direction, un feu arrière, un dispositif de signalisation latérale (également dénommé en langue anglais, sidemarker/side reflex).The lighting device 2 is preferably comprised in the group formed by: a main vehicle headlight, a high beam, a dipped beam, a fog lamp, a daytime running lamp, a direction indicator, a rear light, a lateral signaling device (also called in English language, sidemarker / side reflex).

Le dispositif d'éclairage 2 comprend une source de lumière 4, des moyens de mise en forme du faisceau lumineux issu de la source de lumière 4, par exemple un réflecteur 6 ou une lentille de projection, ou une combinaison de réflecteurs et/ou de lentilles, un boîtier 8 et une glace 10.The lighting device 2 comprises a light source 4, means for shaping the light beam coming from the light source 4, for example a reflector 6 or a projection lens, or a combination of reflectors and / or lenses, a case 8 and an ice cream 10.

La source de lumière 4 et le réflecteur 6 sont couplés l'un à l'autre pour former et orienter le faisceau lumineux généré par le dispositif d'éclairage 2. Le réflecteur 6 est fixé à une paroi arrière du boîtier 8 (au sens de la direction d'émission du faisceau lumineux). La source de lumière 4 est engagée à travers cette paroi ainsi qu'à travers le réflecteur 6.The light source 4 and the reflector 6 are coupled to each other to form and orient the light beam generated by the lighting device 2. The reflector 6 is fixed to a rear wall of the housing 8 (in the sense of the direction of emission of the light beam). The light source 4 is engaged through this wall as well as through the reflector 6.

Le boîtier 8 et la glace 10 sont fixés l'un à l'autre et délimitent entre eux une cavité intérieure 12 du dispositif 2.The housing 8 and the ice-cream 10 are fixed to one another and delimit between them an internal cavity 12 of the device 2.

Le boîtier 8 est par exemple réalisé à partir de métal ou de matière plastique.The housing 8 is for example made from metal or plastic.

La glace 10 présente une face interne 14 orientée en direction du boîtier 8 et délimitant la cavité 12, ainsi qu'une face externe 16 orientée à l'écart du dispositif 2. La glace 10 est translucide de façon à autoriser le passage du faisceau lumineux généré par la source 4 et le réflecteur 6.The ice 10 has an internal face 14 oriented toward the housing 8 and defining the cavity 12, and an outer face 16 facing away from the device 2. The ice 10 is translucent so as to allow the passage of the light beam generated by the source 4 and the reflector 6.

Préférentiellement, la glace 10 est réalisée à partir de polycarbonate, d'acronyme PC, tel que par exemple du Makrolon® AL 2447 commercialisé par la société Bayer, ou encore du polyméthacrylate de méthyle, d'acronyme PMMA.Preferably, the ice 10 is made from polycarbonate, PC acronym, such as for example Makrolon® AL 2447 sold by the company Bayer, or polymethyl methacrylate, acronym PMMA.

Selon l'invention, la glace 10 comporte, sur au moins une région 18 d'une face de la glace 10, une texturation microscopique 20 (Figures 2a à 2c) conférant à ladite région un comportement super-hydrophobe. Un comportement super-hydrophobe correspond à une propriété d'une surface selon laquelle l'angle de contact θ (Fig. 2a) entre ladite surface et une goutte d'eau est supérieur ou égal à 150°. Ceci se traduit par le fait que la goutte d'eau n'accroche pas à la surface en question et y ruisselle sans mouiller la surface. A noter qu'un comportement hydrophobe correspond à une propriété d'une surface selon laquelle l'angle de contact θ (Fig. 2a) entre ladite surface et une goutte d'eau est supérieur ou égal à 90°.According to the invention, the ice 10 comprises, on at least one region 18 of one face of the ice 10, a microscopic texturing ( Figures 2a to 2c ) conferring on said region a super-hydrophobic behavior. Super-hydrophobic behavior corresponds to a property of a surface according to which the contact angle θ ( Fig. 2a ) between said surface and a drop of water is greater than or equal to 150 °. This results in the drop of water not sticking to the surface in question and dripping without wetting the surface. It should be noted that a hydrophobic behavior corresponds to a property of a surface according to which the contact angle θ ( Fig. 2a ) between said surface and a drop of water is greater than or equal to 90 °.

Préférentiellement, comme illustré en Figure 1, la texturation microscopique 20 se situe sur la face interne 14 de la glace 20. Ceci a notamment pour effet d'éviter la formation d'une buée de condensation sur la face interne de la glace 10, ce qui dégrade fortement l'apparence du dispositif 2.Preferably, as illustrated in Figure 1 , the microscopic texturing 20 is located on the inner face 14 of the ice 20. This has the particular effect of preventing the formation of a condensation mist on the inner face of the ice 10, which greatly degrades the appearance of the device 2.

En outre, préférentiellement, la texturation microscopique 20 est venue de matière avec la face correspondante de la glace 10. En d'autres termes, il y a continuité de matière entre la texturation microscopique 20 et la face de la glace portant cette texturation 20. Ceci a notamment pour effet que l'interface entre la texturation et la glace ne comprend pas d'interstice dans lequel l'humidité pourrait s'immiscer, ce qui limiterait l'efficacité de la texturation.In addition, preferentially, the microscopic texturing 20 is integral with the corresponding face of the ice 10. In other words, there is continuity of matter between the microscopic texturing 20 and the face of the ice carrying this texturing 20. This has the effect that the interface between the texturing and ice does not include a gap in which moisture could interfere, which would limit the effectiveness of texturing.

En outre, la texturation microscopique 20 est préférentiellement réalisée à partir du même matériau que le reste de la glace 10, c'est-à-dire de polycarbonate ou de polyméthacrylate de méthyle.In addition, the microscopic texturing is preferably carried out from the same material as the remainder of the ice 10, i.e., polycarbonate or polymethyl methacrylate.

En référence aux Figures 2a à 2c, la texturation microscopique 20 comprend une pluralité de plots 22 en saillie par rapport à la glace 10.With reference to Figures 2a to 2c the microscopic texturing 20 comprises a plurality of studs 22 projecting from the ice 10.

Les plots 22 présentent une forme correspondant sensiblement à une forme du groupe constitué par : une forme effilée (Fig. 2a), une forme de cylindre (Fig. 2b), une forme de champignon (Fig. 2c), une forme de tronc de cône ou tronc de pyramide, une forme de sphéroïdes agrégés.The studs 22 have a shape substantially corresponding to a form of the group consisting of: a tapered shape ( Fig. 2a ), a cylinder shape ( Fig. 2b ), a form of mushroom ( Fig. 2c ), a form of truncated cone or truncated pyramid, a form of aggregated spheroids.

Plus précisément, la forme de cylindre des plots présente une section transversale circulaire, polygonale, par exemple carrée, rectangulaire ou encore hexagonale. En outre, un plot 22 en forme de champignon comprend une première portion de forme cylindrique s'étendant à partir de la glace 10, par exemple de section circulaire ou carrée, surmontée d'une deuxième portion sensiblement arrondie destinée à être au contact de gouttes d'eau. En outre, la forme effilée correspond par exemple à une forme conique ou pyramidale dont la base est au contact de la glace 10.More specifically, the cylinder shape of the studs has a circular cross section, polygonal, for example square, rectangular or hexagonal. In addition, a mushroom-shaped stud 22 comprises a first portion of cylindrical shape extending from the ice 10, for example of circular or square section, surmounted by a second substantially rounded portion intended to be in contact with drops. of water. In addition, the tapered shape corresponds for example to a conical or pyramidal shape whose base is in contact with the ice 10.

Les plots 22 présentent une hauteur h comprise entre 5 µm et 50 µm, avantageusement entre 25 µm et 35 µm, et valant préférentiellement sensiblement 30 µm. En outre, les plots 22 présentent un diamètre d compris entre 5 µm et 50 µm, avantageusement entre 10 µm et 20 µm, et valant préférentiellement sensiblement 15 µm. A noter que le diamètre d est mesuré dans le plan local de la glace 10.The studs 22 have a height h of between 5 μm and 50 μm, advantageously between 25 μm and 35 μm, and preferably being substantially 30 μm. In addition, the pads 22 have a diameter of between 5 microns and 50 microns, preferably between 10 microns and 20 microns, and preferably being substantially 15 microns. Note that the diameter d is measured in the local plane of the ice 10.

En outre, les plots 22 d'une région 18 sont régulièrement distribués au sein de cette région 18. Chaque plot 22 présente ainsi plusieurs plots 22 voisins. Préférentiellement, la distance p séparant deux plots 22 voisins, ou pas p des plots, est comprise entre 5 µm et 50 µm, avantageusement entre 40 µm et 50 µm, et vaut préférentiellement sensiblement 45 µm.In addition, the pads 22 of a region 18 are regularly distributed within this region 18. Each pad 22 thus has several neighboring pads 22. Preferably, the distance p separating two adjacent pads 22, or not p pads, is between 5 microns and 50 microns, preferably between 40 microns and 50 microns, and is preferably substantially 45 microns.

Par exemple, dans l'exemple des Figures 2a à 2c, les plots 22 sont disposés sensiblement selon un arrangement matriciel comprenant des lignes et des colonnes au sein desquelles les plots 22 sont régulièrement espacés. Dans cette configuration, chaque plot 22 présente ainsi quatre plots 22 voisins.For example, in the example of Figures 2a to 2c , the studs 22 are arranged substantially in a matrix arrangement comprising rows and columns in which the studs 22 are regularly spaced. In this configuration, each stud 22 thus has four neighboring studs 22.

Préférentiellement, les dimensions d'un plot 22 donné observent une et/ou l'autre des propriétés suivantes :

  • le rapport entre la hauteur h et le diamètre d d'un plot est sensiblement égal à 2,
  • le rapport entre la hauteur h d'un plot et le pas p est sensiblement égal à 3.
Preferably, the dimensions of a given pad 22 observe one and / or the other of the following properties:
  • the ratio between the height h and the diameter d of a pad is substantially equal to 2,
  • the ratio between the height h of a pad and the pitch p is substantially equal to 3.

Ceci a pour effet d'assurer une bonne homogénéité de l'effet super-hydrophobe sur l'ensemble de la surface de la région 18.This has the effect of ensuring a good homogeneity of the super-hydrophobic effect on the entire surface of the region 18.

Préférentiellement, au sein d'une région 18 donnée, tous les plots 22 présentent sensiblement la même forme et les mêmes dimensions. Les plots d'une région 18 donnée vérifient donc tous l'une et/ou l'autre des conditions ci-dessus.Preferably, within a given region 18, all the pads 22 have substantially the same shape and the same dimensions. The pads of a given region 18 therefore all verify one and / or the other of the above conditions.

Toujours selon l'invention, dans une réalisation particulière, la glace 10 comprend plusieurs régions comprenant chacune une texturation microscopique 20 conférant à la région correspondante un comportement super-hydrophobe. Par exemple, toujours en référence à la Figure 2, la glace 10 comprend deux régions 18, 182. Chacune de ces régions comprend une texturation microscopique 20 telle que décrite ci-dessus.Still according to the invention, in a particular embodiment, the ice 10 comprises several regions each comprising a microscopic texturing 20 conferring on the corresponding region a super-hydrophobic behavior. For example, always referring to the Figure 2 ice 10 comprises two regions 18, 18 2 . Each of these regions includes microscopic texturing as described above.

Dans certains modes de réalisation de cette variante, les plots 22 des texturations 20 de régions différentes présentent des dimensions différentes d'une région à l'autre, ces dimensions demeurant sensiblement identiques au sein d'une même région.In some embodiments of this variant, the pads 22 of texturations 20 of different regions have different dimensions from one region to another, these dimensions remaining substantially identical within the same region.

Le choix des dimensions des plots 22 au sein de la texturation d'une région donnée est par exemple réalisé en fonction de critères tels que l'impact de la présence de la texturation sur les propriétés du faisceau lumineux obtenu, ainsi que le rendu esthétique perceptible à l'oeil nu par un observateur de la glace du projecteur. En outre, le choix de l'emplacement de la ou des régions présentant une texturation microscopique 20 est réalisé en fonction des zones dites « froides » sur la glace du projecteur, dans lesquelles la condensation est susceptible de se former, en fonction de la géométrie du projecteur et de la glace, de la disposition des différents éléments à l'intérieur du boitier du projecteur, du nombre et de l'emplacement des ventilations, du nombre et du type de sources lumineuses ainsi que de leur répartition. Ces zones froides sont déterminées par simulation thermique ou par l'observation de projecteurs en conditions d'utilisation réelles.The choice of the dimensions of the studs 22 within the texturing of a given region is for example made according to criteria such as the impact of the presence of the texturing on the properties of the light beam obtained, as well as the perceptible aesthetic rendering. to the naked eye by an observer of the projector's mirror. In addition, the choice of the location of the region or regions having a microscopic texturing is performed according to the so-called "cold" zones on the projector glass, in which the condensation is likely to form, depending on the geometry projector and ice, the arrangement of the various elements inside the headlamp housing, the number and location of ventilation, the number and type of light sources and their distribution. These cold zones are determined by thermal simulation or by observing projectors under real conditions of use.

Dans certains modes de réalisation, la ou les régions 18 pourvues d'une texturation microscopique 20 s'étendent sur une surface maximale de la face interne 14 de la glace 10, par exemple sur une surface correspondant à plus de 75% de la surface totale de la face interne de la glace 10.In some embodiments, the microscopically textured region (s) 20 extend over a maximum surface of the inner face 14 of the ice 10, for example over an area corresponding to more than 75% of the total surface area. of the inner face of the ice 10.

Toujours selon l'invention, conjointement à la glace 10 comprenant au moins une région à comportement super-hydrophobe, le dispositif d'éclairage 2 comprend des moyens d'évacuation 24 configurés pour évacuer les condensats se formant dans la cavité 12.Still according to the invention, together with the ice 10 comprising at least one region with super-hydrophobic behavior, the lighting device 2 comprises evacuation means 24 configured to evacuate the condensates forming in the cavity 12.

En référence à la Figure 1, les moyens d'évacuation 24 comprennent un orifice d'évacuation 26 ménagé à travers l'une des parois du boîtier 8. Par exemple, l'orifice d'évacuation 26 est ménagé dans la partie inférieure de la paroi arrière du boîtier 8. En outre, les moyens d'évacuation 24 comprennent de manière subsidiaire un circuit d'aspiration 28 connecté à l'orifice d'évacuation 26.With reference to the Figure 1 , the evacuation means 24 comprise a discharge orifice 26 formed through one of the walls of the housing 8. For example, the discharge orifice 26 is arranged in the lower part of the rear wall of the housing 8. In addition, the evacuation means 24 comprise, in a subsidiary manner, a suction circuit 28 connected to the discharge orifice 26.

Lors du fonctionnement du dispositif d'éclairage 2, une partie de l'humidité présente dans la cavité 12 se condense sous forme de gouttes 12 sur la face interne 14 de la glace 10. Les gouttes condensées sur la ou les texturations 20 n'accrochent pas à la région correspondante du fait du comportement super-hydrophobe de la région associée, et, du fait de la gravité, ruissellent en direction de la partie inférieure du dispositif 2. Parallèlement, le circuit d'aspiration 28 génère une dépression dans la cavité 12 et évacue l'humidité de la cavité 12, ce qui prévient l'accumulation d'humidité dans la cavité 12 et limite ainsi la formation de gouttes sur la glace 10 par condensation.During operation of the lighting device 2, part of the moisture present in the cavity 12 is condensed in the form of drops 12 on the inner face 14 of the glass 10. The condensed drops on the texture or textures 20 do not hang not to the corresponding region due to the super-hydrophobic behavior of the associated region, and, because of the gravity, flow towards the lower part of the device 2. In parallel, the suction circuit 28 generates a depression in the cavity 12 and removes moisture from the cavity 12, which prevents the accumulation of moisture in the cavity 12 and thus limits the formation of drops on the ice 10 by condensation.

Un procédé de fabrication d'une glace 10 au cours duquel on forme sur une face de la glace au moins une région 18 va maintenant être décrit en référence à la Figure 3a.A method of making an ice in which at least one region 18 is formed on one side of the ice will now be described with reference to FIG. Figure 3a .

Au cours d'une étape initiale S1, on obtient une glace de dispositif d'éclairage 2, par exemple par un procédé connu tel que le moulage.During an initial step S1, a lighting device ice 2 is obtained, for example by a known method such as molding.

Au cours d'une étape S2, on forme, dans au moins une région d'une face de la glace, une texturation microscopique 20 telle que décrite ci-dessus et conférant à la région correspondante un comportement super-hydrophobe. La texturation microscopique 20 est formée par usinage par faisceau laser, ou encore par faisceau d'ions.During a step S2, microscopic texturing as described above is formed in at least one region of one face of the ice and gives the corresponding region a super-hydrophobic behavior. The microscopic texturing is formed by laser beam machining, or ion beam.

Alternativement, en référence aux Figures 3b et 4, au cours de l'étape initiale S1, dans au moins une région d'une surface d'un moule M, on réalise une texturation microscopique 20' complémentaire d'une texturation microscopique 20 décrite ci-dessus. Par exemple, le moule M est réalisé en acier.Alternatively, with reference to Figures 3b and 4 during the initial step S1, in at least one region of a surface of a mold M, a microscopic texturing 20 'complementary to a microscopic texturing described above is carried out. For example, the mold M is made of steel.

Puis, au cours de l'étape S2, on forme simultanément la glace 10 et la ou lesdites régions 18 de la glace comprenant une texturation microscopique 20 complémentaire de la texturation microscopique 20' par moulage en utilisant le moule M.Then, in step S2, ice 10 and ice region (s) 18 including microscopic texturing complementary to microscopic texturing 20 'by molding are simultaneously formed using mold M.

D'autres modes de réalisation sont envisageables.Other embodiments are possible.

En particulier, la description ci-dessus a été donnée dans le cas d'une ou plusieurs régions 18 pourvues d'une texturation microscopique 20 agencées sur la face interne 14 de la glace 10. Toutefois, on envisage également des modes de réalisation dans lesquels seule la face externe 16 de la glace 10 comporte une ou plusieurs régions 18, ou encore des modes de réalisation dans lesquelles les faces interne 14 et externe 16 de la glace 10 comportent chacune au moins une texturation microscopique 20.In particular, the above description has been given in the case of one or more microscopically textured regions 20 arranged on the inner face 14 of the ice 10. However, embodiments are also contemplated in which only the outer face 16 of the ice 10 comprises one or more regions 18, or embodiments in which the inner faces 14 and outer 16 of the ice 10 each comprise at least one microscopic texturing 20.

Claims (15)

Glace (10) pour dispositif d'éclairage de véhicule (2), caractérisée en ce qu'elle comporte, sur au moins une région (18, 182) d'au moins une face (14, 16) de la glace (10), une texturation microscopique (20) conférant à ladite région un comportement super-hydrophobe.Ice (10) for a vehicle lighting device (2), characterized in that it comprises, on at least one region (18, 18 2 ) of at least one face (14, 16) of the ice (10 ), a microscopic texturing (20) conferring on said region a super-hydrophobic behavior. Glace selon la revendication 1, caractérisée en ce que la texturation microscopique (20) comprend une pluralité de plots (22) en saillie par rapport à la dite face (14, 16).Ice according to claim 1, characterized in that the microscopic texturing (20) comprises a plurality of studs (22) projecting from said face (14, 16). Glace selon la revendication 2, caractérisée en ce que les plots (22) présentent une forme correspondant sensiblement à une forme du groupe constitué par : une forme de cylindre, par exemple de section circulaire ou polygonale, une forme de champignon, une forme effilée, une forme de tronc de cône ou de tronc de pyramide, une forme de sphéroïdes agrégés.Ice according to claim 2, characterized in that the pads (22) have a shape substantially corresponding to a shape of the group consisting of: a cylinder shape, for example of circular or polygonal section, a mushroom shape, a tapered shape, a form of truncated cone or truncated pyramid, a form of aggregated spheroids. Glace selon la revendication 2 ou 3, caractérisée en ce que deux plots (22) voisins sont situés à une distance (p) l'un de l'autre comprise entre 5 µm et 50 µm, avantageusement entre 40 µm et 50 µm, et valant préférentiellement sensiblement 45 µmIce according to claim 2 or 3, characterized in that two adjacent pads (22) are situated at a distance (p) from one another of between 5 μm and 50 μm, advantageously between 40 μm and 50 μm, and preferably being substantially 45 μm Glace selon l'une quelconque des revendications 2 à 4, caractérisée en ce que les plots (22) présentent une hauteur (h) comprise entre 5 µm et 50 µm, avantageusement entre 25 µm et 35 µm, et valant préférentiellement sensiblement 30 µmIce according to any one of claims 2 to 4, characterized in that the pads (22) have a height ( h ) of between 5 microns and 50 microns, advantageously between 25 microns and 35 microns, and preferably being substantially 30 microns. Glace selon l'une quelconque des revendications 2 à 5, caractérisée en ce que les plots (22) présentent un diamètre (d) compris entre 5 µm et 50 µm, avantageusement entre 10 µm et 20 µm, et valant préférentiellement sensiblement 15 µmIce according to any one of claims 2 to 5, characterized in that the pads (22) have a diameter ( d ) between 5 microns and 50 microns, advantageously between 10 microns and 20 microns, and preferably being substantially 15 microns Glace selon l'une quelconque des revendications précédentes, caractérisée en ce que la texturation microscopique (20) est venue de matière avec la face (14, 16) de la glace (10).Ice according to any one of the preceding claims, characterized in that the microscopic texturing (20) is integral with the face (14, 16) of the ice (10). Glace selon l'une quelconque des revendications précédentes, caractérisée en ce que ladite face (14, 16) est une face interne (14) de la glace.Ice according to any one of the preceding claims, characterized in that said face (14, 16) is an inner face (14) of the ice. Glace selon l'une quelconque des revendications précédentes, caractérisée en ce qu'au moins ladite texturation microscopique (20) est réalisée à partir de polycarbonate ou de polyméthacrylate de méthyle.Ice according to any one of the preceding claims, characterized in that at least said microscopic texturing (20) is made from polycarbonate or polymethylmethacrylate. Procédé de fabrication d'une glace selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend une étape au cours de laquelle, sur une face de ladite glace, on forme au moins une région (18) comprenant une texturation microscopique (20) conférant à ladite région un comportement super-hydrophobe.A process for producing an ice cream according to any one of the preceding claims, characterized in that it comprises a step during which, on one side of said ice, at least one region (18) comprising a microscopic texturing is formed (20) imparting to said region a super-hydrophobic behavior. Procédé de fabrication selon la revendication 10, caractérisé en ce qu'il comprend une étape (S1) au cours de laquelle, dans une région d'une surface d'un moule (M), on réalise une texturation microscopique complémentaire (20') d'une texturation microscopique (20) adaptée pour conférer à une surface un comportement super-hydrophobe, et on forme simultanément ladite glace (10) et ladite région (18, 182) de la glace comprenant une texturation microscopique par moulage dans ledit moule (M).Manufacturing method according to claim 10, characterized in that it comprises a step (S1) in which, in a region of a surface of a mold (M), complementary microscopic texturing is performed (20 ') microscopic texturing (20) adapted to impart superhydrophobic behavior to a surface, and simultaneously forming said ice (10) and said region (18, 18 2 ) of the ice comprising microscopic texturing by molding in said mold (M). Procédé de fabrication selon la revendication 10, caractérisé en ce qu'il comprend une étape (S1) au cours de laquelle on obtient une glace, puis on forme (S2), sur une face (14, 16) de ladite glace (10), ladite région par usinage par un faisceau laser ou un faisceau d'ions.Manufacturing process according to claim 10, characterized in that it comprises a step (S1) during which an ice is obtained, and then (S2) is formed on one face (14, 16) of said ice (10) said region by machining with a laser beam or an ion beam. Dispositif d'éclairage de véhicule (2), caractérisé en ce qu'il comprend une glace (10) selon l'une quelconque des revendications 1 à 9.Vehicle lighting device (2), characterized in that it comprises an ice-cream (10) according to any one of Claims 1 to 9. Dispositif d'éclairage de véhicule selon la revendication 13, caractérisé en ce qu'il comprend une cavité (12) délimitée par ladite glace (10), le dispositif d'éclairage comprenant en outre des moyens d'évacuation (24) débouchant dans ladite cavité pour l'évacuation de condensats situés dans ladite cavité, le comportement super-hydrophobe de la texturation favorisant l'évacuation des condensats se formant dans ladite cavité (12).Vehicle lighting device according to claim 13, characterized in that it comprises a cavity (12) delimited by said mirror (10), the lighting device further comprising evacuation means (24) opening into said cavity for the discharge of condensates located in said cavity, the super-hydrophobic behavior of the texturing favoring the evacuation of the condensates forming in said cavity (12). Dispositif d'éclairage de véhicule selon la revendication 14, caractérisé en ce que les moyens d'évacuation (24) comprennent un orifice d'évacuation (26) débouchant dans ladite cavité et un circuit d'aspiration (28) connecté audit orifice d'évacuation (24).Vehicle lighting device according to claim 14, characterized in that the evacuation means (24) comprise a discharge opening (26) opening into said cavity and a suction circuit (28) connected to said orifice of evacuation (24).
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FR1553367A FR3035180B1 (en) 2015-04-16 2015-04-16 ICE FOR VEHICLE LIGHTING DEVICE, METHOD OF MANUFACTURING SAME, AND VEHICLE LIGHTING DEVICE COMPRISING SUCH ICE

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US20060110541A1 (en) * 2003-12-18 2006-05-25 Russell Jodi L Treatments and kits for creating transparent renewable surface protective coatings
WO2007053242A2 (en) * 2005-09-19 2007-05-10 Wayne State University Transparent hydrophobic article having self-cleaning and liquid repellant features and method of fabricating same
US20080241408A1 (en) * 2007-04-02 2008-10-02 Scott Cumberland Colloidal Particles for Lotus Effect
US20100279068A1 (en) * 2009-05-04 2010-11-04 Glen Bennett Cook Embossed glass articles for anti-fingerprinting applications and methods of making
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FR3035180B1 (en) 2018-11-09
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