EP2604915B1 - Lighting and/or signalling device and motor vehicle including such a device - Google Patents
Lighting and/or signalling device and motor vehicle including such a device Download PDFInfo
- Publication number
- EP2604915B1 EP2604915B1 EP12196229.4A EP12196229A EP2604915B1 EP 2604915 B1 EP2604915 B1 EP 2604915B1 EP 12196229 A EP12196229 A EP 12196229A EP 2604915 B1 EP2604915 B1 EP 2604915B1
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- European Patent Office
- Prior art keywords
- particles
- housing
- initiation
- water
- internal space
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- 230000011664 signaling Effects 0.000 title claims description 12
- 239000002245 particle Substances 0.000 claims description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 239000000428 dust Substances 0.000 claims description 15
- 150000002500 ions Chemical class 0.000 claims description 10
- JKFYKCYQEWQPTM-UHFFFAOYSA-N 2-azaniumyl-2-(4-fluorophenyl)acetate Chemical compound OC(=O)C(N)C1=CC=C(F)C=C1 JKFYKCYQEWQPTM-UHFFFAOYSA-N 0.000 claims description 5
- 229910021612 Silver iodide Inorganic materials 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 5
- 229940045105 silver iodide Drugs 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims description 2
- 230000000977 initiatory effect Effects 0.000 claims 8
- 230000029058 respiratory gaseous exchange Effects 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 229920000544 Gore-Tex Polymers 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- 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
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/141—Light emitting diodes [LED]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
- F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
- F21S43/14—Light emitting diodes [LED]
Definitions
- the present invention relates to lighting and / or signaling devices, including headlights and rear lights of motor vehicles.
- incandescent lamps in the front projectors causes a very rapid evaporation of the water droplets formed on the ice, thanks to the heat release produced by these lamps.
- the present invention aims to remedy this drawback and, in particular, to prevent the formation of droplets and frost on the ice of a lighting and / or signaling device, for example mounted on a motor vehicle.
- the primer particles emitted and the particles of dust and / or water floating inside the internal volume of the lighting and / or signaling device attract each other to then combine them.
- a primer particle is associated with one or more particles of dust or water
- the heavier aggregate of particles thus formed is drawn downwards by the effect of gravity.
- the dust particles and the water particles present in the air are removed by gravity inside the internal volume of the lighting and / or signaling device, thereby drying out the indoor air and prevents the formation of droplets on the face of the ice facing the internal volume, whatever the temperature of the indoor air.
- the primer particles emitted are positive and / or negative ions.
- the transmission means can advantageously be mounted on a portion bottom of said rear background.
- the lower portion of the rear background comprising the emission means is preferably arranged below the light source, in order to prevent, or at least limit, an accumulation of water particles on the support on which is mounted the light source.
- the device comprising a reflector interposed between the transparent element and the housing
- the transmission means are advantageously arranged behind the reflector, between the latter and the housing, to prevent the formation of a fog in front of the emitted light beam by the light source.
- the reflector splits the internal volume in two to define a front sub-volume and a rear sub-volume in communication with each other, the transmitting means being disposed within said rear sub-volume. .
- the evacuation means are arranged in the lower rear part of the housing.
- said device comprises a reservoir in communication with the evacuation means, which is intended to collect the particles of dust and / or water associated with the primer particles.
- the evacuation means advantageously comprise at least one opening formed in one of the walls of the housing, which can be closed by a breathable membrane (16), for example of the GORE TEX (registered trademark) type, able to let the water particles associated with the seed particles from the internal volume to the outside thereof.
- a breathable membrane (16) for example of the GORE TEX (registered trademark) type, able to let the water particles associated with the seed particles from the internal volume to the outside thereof.
- the present invention also relates to a motor vehicle which comprises at least one lighting and / or signaling device as described above.
- primer particle emission means are preferably activated at least during a part of stopping the operation of said vehicle.
- the figure 1 shows, in a schematic cross section, an example of lighting and / or signaling device according to the present invention.
- FIG. 1 Diagrammatically a lighting and / or signaling device before 1 of a motor vehicle (hereinafter referred to as a front projector) according to the present invention.
- the present invention is not limited to front headlamps, but also applies to motor vehicle taillights and, more generally, to any device capable of emitting light in which the formation of condensation can be observed.
- the front projector 1 comprises a housing 2 (also referred to as “rear block” or “optical block”) which serves in particular as a support part on which are in particular mechanically reported one or more light sources 3 (only one is represented on the figure 1 ), a reflector 4 and a mask 5.
- the housing 2 also connects the front projector 1 to the vehicle (not shown).
- the housing 2 comprises a plurality of attachment points (which are associated for example threads) to ensure a stable mechanical connection with the vehicle.
- the housing 2 which has the general shape of a bowl, comprises a rear base 6 and a peripheral strip 7, of which only the upper parts 7A and 7B lower are visible on the figure 1 .
- the peripheral strip 7 extends in a direction substantially orthogonal to the rear base 6.
- the projector 1 further comprises a transparent element 8 through which one or more beams of the light source 3 pass to illuminate the route taken by the vehicle.
- a transparent element 8 is transparent in that it allows the passage of at least 75% of the luminous flux of the light rays emitted by the light source 3 which reaches it. In other words, the transparent element 8 degrades the photometric function of the light source 3 by at most 25%.
- the front projector 1 comprises a single light source 3.
- the front projector 1 comprises a single light source 3.
- the light source 3 is mounted on a support 10 formed, for example, by a printed circuit.
- the reflector 4 in the form of a shell, at the bottom of which the light source 3 is arranged, makes it possible to direct the light rays emitted by the latter towards the transparent element 8.
- a diopter 11, for example a lens, is furthermore arranged in front of the light source 3, so as to focus, around a given direction, the multitude of light rays emitted by it.
- the front projector 1 also comprises an ionization device 12 for emitting, in the internal volume Vi, positive and / or negative ions 13 capable of associating with dust particles and / or water particles (no represented) in suspension in the internal volume Vi.
- the ionization device 12 is attached to the rear base 6 of the housing 2.
- it is advantageously mounted on the lower portion 6A of the rear base 6, below the support 10 of the light source 3.
- the ionization device 12 could alternatively be fixed on the portion upper 6B rear end 6.
- the ionization device 12 is thus housed inside the rear sub-volume Vs2.
- the ions are combined in particular with the water particles suspended in the air inside the internal volume Vi of the projector 1, each ion being able to associate with one or more particles of water according to its nature.
- the ion-water particle aggregates thus formed are attracted to the lower part 7B of the peripheral strip 7 under the effect of the gravitational force.
- the air present inside the volume Vi is thus dried, which prevents the appearance of a condensation layer on the transparent element 2, regardless of the temperature difference between the indoor air and the air outside.
- the arrangement of the ionization device 12 in the lower portion 6A of the rear bottom 6 of the housing 2 makes it possible to confine the emission of the particles in the rear sub-volume Vs2 and to limit the emission of the particles into the sub-volume. volume before Vs1, which could degrade the efficiency of the light source 3.
- the device can be associated with vents by means of baffles to ensure drying of the air arriving ventilation and entering the lighting device and or signaling, to limit the increase of the humidity level in it.
- such an arrangement of the ionization device 12 makes it possible to limit the deposition, by gravity, of ion-particle aggregates of water or dust on the support 10 of the light-sensitive light source 3, these aggregates forming essentially in the vicinity of the ionization arrangement 12.
- the ion emitting means 12 when stopping the operation of the vehicle, either for a predetermined duration or during the entire absence of operation of the vehicle.
- appropriate means for controlling the ion-emitting means 12 may be provided. It goes without saying that an implementation of the ion emission means during the operation of the vehicle is also possible.
- the projector 1 also comprises means 14 for discharging outside the internal volume Vi the particles of dust and / or water agglomerated with the ions 13.
- the evacuation means 14 are arranged in the rear part of the projector 1 in the vicinity of the ionization device 13. They are in the form of an opening 15 (for example a slot extending over a part of the width of the projector 1) which is provided in the lower part 7B of the peripheral strip 7.
- a breathable membrane 16 for example of GORE TEX type, capable of passing the aggregates formed of ions and water particles associated with the internal sub-volume Vs2 towards the outside (the arrow F symbolizing the displacement of the aggregates formed).
- the front projector 1 advantageously comprises a removable reservoir 17 connected to the evacuation means 14 and adapted to receive the dust particles and / or water associated with the ions 13. In this way, the reservoir 17 can be emptied, once its maximum filling level is reached.
- the transmitting means could emit silver iodide particles, so as to dry the air inside the volume Vi of the projector before 1 in a manner similar to that presented for the In the latter case, the transmitting means could be in the form of diffusion means.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Description
La présente invention concerne les dispositifs d'éclairage et/ou de signalisation, notamment des projecteurs avant et des feux arrière de véhicules automobiles.The present invention relates to lighting and / or signaling devices, including headlights and rear lights of motor vehicles.
Bien qu'elle soit particulièrement adaptée aux véhicules automobiles, la présente invention n'en est toutefois pas limitée à cette application et pourrait tout aussi bien être mise en oeuvre par exemple dans des dispositifs d'éclairage fixes de bâtiments.Although it is particularly suitable for motor vehicles, the present invention is however not limited to this application and could equally well be implemented for example in fixed lighting devices of buildings.
On sait que, du fait d'une différence de température entre l'air à l'intérieur d'un projecteur avant d'un véhicule automobile et l'air à l'extérieur de celui-ci, l'humidité présente dans l'air intérieur se condense au contact de la glace du projecteur plus froide. Il se forme alors des gouttelettes d'eau sur la face interne de la glace tournée vers l'intérieur du projecteur. Un tel phénomène est fréquemment observé pour des températures de l'air extérieur inférieures à 5°C. Lorsque la température de l'air extérieur passe en dessous de 0°C, ces gouttelettes d'eau gèlent jusqu'à former une couche de givre sur la face interne de la glace.It is known that, because of a difference in temperature between the air inside a front headlight of a motor vehicle and the air outside it, the humidity present in the Inner air condenses on contact with the cooler projector glass. Water droplets are then formed on the inside of the ice facing the inside of the projector. Such a phenomenon is frequently observed for outside air temperatures below 5 ° C. When the outside air temperature drops below 0 ° C, these water droplets freeze to a frost layer on the inside of the ice.
On sait également que l'utilisation de lampes à incandescence dans les projecteurs avant provoque une évaporation très rapide des gouttelettes d'eau formées sur la glace, grâce au dégagement thermique produit par ces lampes.It is also known that the use of incandescent lamps in the front projectors causes a very rapid evaporation of the water droplets formed on the ice, thanks to the heat release produced by these lamps.
Cependant, le recours de plus en plus fréquent à de nouvelles sources lumineuses offrant un éclairage de meilleure qualité tout en diminuant la consommation électrique associée s'accompagne, en contrepartie, d'une réduction des dégagements thermiques à l'intérieur du projecteur qui ne suffisent plus à évaporer les gouttes d'eau formées sur la glace.However, the recourse more and more frequently to new light sources offering better quality lighting while reducing the associated power consumption is accompanied, in return, a reduction of the thermal clearances inside the projector that are not enough. more to evaporate the drops of water formed on the ice.
Pour pallier cet inconvénient, le document de brevet
Cependant, outre la consommation élevée en électricité d'un tel dispositif de chauffage, la disposition de celui-ci par rapport à la glace du projecteur ne permet pas une suppression rapide de la condensation formée. Cela s'avère incompatible avec les attentes des utilisateurs qui souhaitent disposer d'un système d'éclairage de leur véhicule totalement opérationnel dès l'allumage de ce dernier.However, in addition to the high electricity consumption of such a heater, the arrangement of it with respect to the projector glass does not allow a rapid suppression of the formed condensation. This is incompatible with the expectations of users who wish to have a lighting system of their vehicle fully operational at the ignition of the latter.
La présente invention a pour objet de remédier à cet inconvénient et, notamment, de prévenir la formation de gouttelettes et de givre sur la glace d'un dispositif d'éclairage et/ou de signalisation, par exemple monté sur un véhicule automobile.The present invention aims to remedy this drawback and, in particular, to prevent the formation of droplets and frost on the ice of a lighting and / or signaling device, for example mounted on a motor vehicle.
A cette fin, selon l'invention, le dispositif d'éclairage et/ou de signalisation pour véhicule automobile, comprenant un boîtier, un élément transparent obturant, au moins partiellement, le boîtier et au moins une source lumineuse disposée dans un volume interne délimité par le boîtier et l'élément transparent associé,
est remarquable par le fait qu'il comprend des moyens pour émettre, dans le volume interne, des particules d'amorce aptes à s'associer avec des particules de poussière et/ou des particules d'eau en suspension dans ledit volume interne, pour que les agrégats ions-particules d'eau ou de poussière s'éliminent par gravité.To this end, according to the invention, the lighting and / or signaling device for a motor vehicle, comprising a housing, a transparent element closing, at least partially, the housing and at least one light source disposed in a delimited internal volume by the case and the associated transparent element,
is remarkable in that it comprises means for emitting, in the internal volume, primer particles capable of associating with dust particles and / or water particles suspended in said internal volume, for the ion-particle aggregates of water or dust are removed by gravity.
Ainsi, grâce à l'invention, les particules d'amorce émises et les particules de poussière et/ou d'eau flottant à l'intérieur du volume interne du dispositif d'éclairage et/ou de signalisation s'attirent mutuellement pour ensuite se combiner entre elles. Dès lors qu'une particule d'amorce s'est associée avec une ou plusieurs particules de poussière ou d'eau, l'agrégat de particules ainsi formé, plus lourd, est attiré vers le bas sous l'effet de la gravité. Ainsi faisant, on élimine, par gravité, les particules de poussière et les particules d'eau présentes dans l'air à l'intérieur du volume interne du dispositif d'éclairage et/ou de signalisation, ce qui assèche l'air intérieur et prévient la formation de gouttelettes sur la face de la glace tournée vers le volume interne, quelle que soit la température de l'air intérieur.Thus, thanks to the invention, the primer particles emitted and the particles of dust and / or water floating inside the internal volume of the lighting and / or signaling device attract each other to then combine them. As soon as a primer particle is associated with one or more particles of dust or water, the heavier aggregate of particles thus formed is drawn downwards by the effect of gravity. In doing so, the dust particles and the water particles present in the air are removed by gravity inside the internal volume of the lighting and / or signaling device, thereby drying out the indoor air and prevents the formation of droplets on the face of the ice facing the internal volume, whatever the temperature of the indoor air.
Dans un mode de réalisation conforme à l'invention, les particules d'amorce émises sont des ions positifs et/ou négatifs.In an embodiment according to the invention, the primer particles emitted are positive and / or negative ions.
En variante ou en complément, les particules d'amorce émises sont particules d'iodure d'argent. En effet, la structure cristalline de l'iodure d'argent est proche de celle de la neige, de sorte que l'iodure d'argent provoque une réaction alignant les particules d'eau dans une structure similaire à celle de la glace, gelant les gouttelettes d'eau et forçant leur précipitation.Alternatively or in addition, the primer particles emitted are silver iodide particles. Indeed, the crystalline structure of silver iodide is close to that of snow, so that silver iodide causes a reaction aligning water particles in a structure similar to that of ice, freezing the droplets of water and forcing their precipitation.
De préférence, les moyens d'émission de particules sont agencés dans la partie arrière, de préférence inférieure, du boîtier, de manière à éviter qu'ils interfèrent avec le faisceau lumineux émis par la source lumineuse.Preferably, the particle emitting means are arranged in the rear part, preferably below, of the housing, so as to prevent them from interfering with the light beam emitted by the light source.
En outre, le boîtier comportant un fond arrière en regard de l'élément transparent, les moyens d'émission peuvent avantageusement être montés sur une portion inférieure dudit fond arrière.In addition, since the housing has a rear base facing the transparent element, the transmission means can advantageously be mounted on a portion bottom of said rear background.
En particulier, la portion inférieure du fond arrière comportant les moyens d'émission est de préférence agencée en dessous de la source lumineuse, afin de prévenir, ou tout au moins limiter, une accumulation de particules d'eau sur le support sur lequel est montée la source lumineuse.In particular, the lower portion of the rear background comprising the emission means is preferably arranged below the light source, in order to prevent, or at least limit, an accumulation of water particles on the support on which is mounted the light source.
De plus, le dispositif comprenant un réflecteur intercalé entre l'élément transparent et le boîtier, les moyens d'émission sont avantageusement agencés derrière le réflecteur, entre ce dernier et le boîtier, pour empêcher la formation d'un brouillard devant le faisceau lumineux émis par la source lumineuse.In addition, the device comprising a reflector interposed between the transparent element and the housing, the transmission means are advantageously arranged behind the reflector, between the latter and the housing, to prevent the formation of a fog in front of the emitted light beam by the light source.
De préférence, le réflecteur scinde le volume interne en deux pour définir un sous-volume avant et un sous-volume arrière en communication l'un avec l'autre, les moyens d'émission étant disposés à l'intérieur dudit sous-volume arrière.Preferably, the reflector splits the internal volume in two to define a front sub-volume and a rear sub-volume in communication with each other, the transmitting means being disposed within said rear sub-volume. .
Par ailleurs, ledit dispositif comprend des moyens pour évacuer à l'extérieur du volume interne les particules de poussière et/ou d'eau associées aux particules d'amorce.Furthermore, said device comprises means for evacuating outside the internal volume the dust particles and / or water associated with the primer particles.
De façon avantageuse, les moyens d'évacuation sont disposés dans la partie arrière inférieure du boîtier.Advantageously, the evacuation means are arranged in the lower rear part of the housing.
De préférence, ledit dispositif comprend un réservoir en communication avec les moyens d'évacuation, qui est destiné à recueillir les particules de poussière et/ou d'eau associées aux particules d'amorce.Preferably, said device comprises a reservoir in communication with the evacuation means, which is intended to collect the particles of dust and / or water associated with the primer particles.
En outre, les moyens d'évacuation comportent avantageusement au moins une ouverture ménagée dans une des parois du boîtier, qui peut être obturée par une membrane respirante (16), par exemple de type GORE TEX (marque déposée), apte à laisser passer les particules d'eau associées aux particules d'amorce du volume interne vers l'extérieur de celui-ci.In addition, the evacuation means advantageously comprise at least one opening formed in one of the walls of the housing, which can be closed by a breathable membrane (16), for example of the GORE TEX (registered trademark) type, able to let the water particles associated with the seed particles from the internal volume to the outside thereof.
En variante, les moyens d'évacuation peuvent comporter au moins un canal, de préférence en chicane.Alternatively, the evacuation means may comprise at least one channel, preferably in a baffle.
Par ailleurs, la présente invention concerne encore un véhicule automobile qui comporte au moins un dispositif d'éclairage et/ou de signalisation tel que décrit précédemment.Furthermore, the present invention also relates to a motor vehicle which comprises at least one lighting and / or signaling device as described above.
En outre, les moyens d'émission de particules d'amorce sont de préférence activés au moins pendant une partie de l'arrêt du fonctionnement dudit véhicule.In addition, the primer particle emission means are preferably activated at least during a part of stopping the operation of said vehicle.
L'unique figure du dessin annexé fera bien comprendre comment l'invention peut être réalisée. Sur cette figure, des références identiques désignent des éléments semblables.The sole figure of the appended drawing will make it clear how the invention can be realized. In this figure, identical references designate similar elements.
La
Sur la
Bien entendu, la présente invention n'est pas limitée aux projecteurs avant, mais s'applique également aux feux arrière de véhicules automobiles et, de façon plus générale, à tout dispositif apte à émettre de la lumière dans lequel la formation de condensation peut être observée.Of course, the present invention is not limited to front headlamps, but also applies to motor vehicle taillights and, more generally, to any device capable of emitting light in which the formation of condensation can be observed.
Par la suite, les notions de « supérieur » et « inférieur » font référence, respectivement, aux parties inférieure et supérieure de la
Comme le montre la
Le boîtier 2 permet également de relier le projecteur avant 1 au véhicule (non représenté). Pour cela, le boîtier 2 comporte une pluralité de points de fixation (auxquels sont par exemple associés des filetages) pour assurer une liaison mécanique stable avec le véhicule.The
En outre, le boîtier 2, qui présente la forme générale d'une cuvette, comprend un fond arrière 6 et un bandeau périphérique 7, dont seules les parties supérieure 7A et inférieure 7B sont visibles sur la
Le projecteur 1 comporte en outre un élément transparent 8 à travers lequel un ou plusieurs faisceaux de la source lumineuse 3 passent pour éclairer la route emprunter par le véhicule. Il s'agit par exemple d'une glace en verre ou bien encore en polycarbonate. L'élément 8 est dit transparent en ce qu'il permet le passage d'au moins 75% du flux lumineux des rayons lumineux émis par la source lumineuse 3 qui l'atteignent. Autrement dit, l'élément transparent 8 dégrade la fonction photométrique de la source lumineuse 3 d'au plus 25%.The projector 1 further comprises a
En outre, l'élément transparent 8 est formé d'une paroi frontale 8A, exposée au flux d'air extérieur au projecteur 1, et d'une jupe périphérique 8B, qui s'étend le long du contour de la paroi frontale 8A et qui est destinée à être solidarisée sur le boîtier 2 au niveau du bord périphérique libre 9 du bandeau 7. Autrement dit, le bord libre 9 du boîtier 2 forme un appui en forme de gorge contre lequel peut être appliquée la jupe périphérique 8B de l'élément transparent 8. Ainsi, un fois monté, l'élément transparent 8 ferme le boîtier 2, ce qui délimite un volume interne Vi au sein duquel est logée la source lumineuse 3.In addition, the
Par ailleurs, comme le montre la
Bien que pouvant se présenter source la forme d'une lampe à décharge utilisant un gaz de type Xénon, la source lumineuse 3 comprend avantageusement une ou plusieurs diodes électroluminescentes à l'origine des rayons lumineux formant le faisceau projeté sur la route.Although it may be in the form of a discharge lamp using a Xenon type gas, the
En outre, la source lumineuse 3 est montée sur un support 10 formé, par exemple, par un circuit imprimé. Le réflecteur 4 en forme de coquille, au fond duquel est disposée la source lumineuse 3, permet de diriger les rayons lumineux émis par cette dernière vers l'élément transparent 8. Un dioptre 11, par exemple une lentille, est en outre agencé devant la source lumineuse 3, de manière à focaliser, autour d'une direction donnée, la multitude de rayons lumineux émise par celle-ci.In addition, the
Selon l'invention, comme le montre la
Dans l'exemple de la
Le réflecteur 4 et le masque 5, intercalés entre l'élément transparent 8 et le boîtier 2, divisent en deux le volume interne Vi, ce qui définit un sous-volume avant Vs1 et un sous-volume arrière Vs2 en communication l'un avec l'autre. Le dispositif d'ionisation 12 est donc logé à l'intérieur du sous-volume arrière Vs2.The
Ainsi, grâce à l'invention, les ions se combinent notamment avec les particules d'eau en suspension dans l'air à l'intérieur du volume interne Vi du projecteur 1, chaque ion pouvant s'associer à une ou plusieurs particules d'eau selon sa nature. Les agrégats ion-particules d'eau ainsi formé sont attirés vers la partie inférieure 7B du bandeau périphérique 7 sous l'effet de la force gravitationnelle. L'air présent à l'intérieur du volume Vi est ainsi asséché, ce qui prévient l'apparition d'une couche de condensation sur l'élément transparent 2, quelle que soit la différence de température entre l'air intérieur et l'air extérieur.Thus, thanks to the invention, the ions are combined in particular with the water particles suspended in the air inside the internal volume Vi of the projector 1, each ion being able to associate with one or more particles of water according to its nature. The ion-water particle aggregates thus formed are attracted to the
En outre, la disposition du dispositif d'ionisation 12 dans la portion inférieure 6A du fond arrière 6 du boîtier 2 permet de confiner l'émission des particules dans le sous-volume arrière Vs2 et de limiter l'émission des particules dans le sous-volume avant Vs1, ce qui pourrait dégrader l'efficacité de la source lumineuse 3. Le dispositif peut être associé à des ventilations par le moyen de chicanes pour assurer un assèchement de l'air arrivant des ventilations et entrant dans le dispositif d'éclairage et/ou de signalisation, pour limiter l'augmentation du taux d'humidité dans celui-ci.In addition, the arrangement of the
De plus, une telle disposition du dispositif d'ionisation 12 permet de limiter le dépôt, par gravité, d'agrégats ions-particules d'eau ou de poussière sur le support 10 de la source lumineuse 3 sensible à l'humidité, ces agrégats se formant essentiellement au voisinage du disposition d'ionisation 12.In addition, such an arrangement of the
Pour une efficacité accrue, il est préférable d'activer les moyens d'émission d'ions 12 lors de l'arrêt du fonctionnement du véhicule, soit pendant une durée prédéterminée, soit durant l'intégralité de l'absence de fonctionnement du véhicule. Pour cela, des moyens appropriés de commande des moyens d'émission d'ions 12 peuvent être prévus. Il va de soi qu'une mise en oeuvre des moyens d'émission d'ions pendant le fonctionnement du véhicule est également envisageable.For increased efficiency, it is preferable to activate the ion emitting means 12 when stopping the operation of the vehicle, either for a predetermined duration or during the entire absence of operation of the vehicle. For this, appropriate means for controlling the ion-emitting
Par ailleurs, selon l'invention, le projecteur 1 comprend également des moyens 14 pour évacuer à l'extérieur du volume interne Vi les particules de poussière et/ou d'eau agglomérées aux ions 13.Furthermore, according to the invention, the projector 1 also comprises means 14 for discharging outside the internal volume Vi the particles of dust and / or water agglomerated with the
Les moyens d'évacuation 14 sont disposés dans la partie arrière du projecteur 1 au voisinage du dispositif d'ionisation 13. Ils se présentent sous la forme d'une ouverture 15 (par exemple une fente s'étendant sur une partie de la largeur du projecteur 1) qui est ménagée dans la partie inférieure 7B du bandeau périphérique 7.The evacuation means 14 are arranged in the rear part of the projector 1 in the vicinity of the
En outre, la face de l'ouverture 15 tournée vers le sous-volume Vs2 est recouverte par une membrane respirante 16, par exemple de type GORE TEX, capable de laisser passer les agrégats formés d'ions et de particules d'eau associées du sous-volume interne Vs2 vers l'extérieur (la flèche F symbolisant le déplacement des agrégats formés).In addition, the face of the
De plus, le projecteur avant 1 comprend avantageusement un réservoir amovible 17 relié aux moyens d'évacuation 14 et apte à recevoir les particules de poussière et/ou d'eau associées aux ions 13. De cette façon, le réservoir 17 peut être vidé, une fois son niveau de remplissage maximal atteint.In addition, the front projector 1 advantageously comprises a
En variante ou en complément, les moyens d'émission pourraient émettre des particules d'iodure d'argent, de manière à assécher l'air à l'intérieur du volume Vi du projecteur avant 1 d'une manière semblable à celle présentée pour les ions 13. Dans ce dernier cas, les moyens d'émission pourraient se présenter sous la forme de moyens de diffusion.Alternatively or in addition, the transmitting means could emit silver iodide particles, so as to dry the air inside the volume Vi of the projector before 1 in a manner similar to that presented for the In the latter case, the transmitting means could be in the form of diffusion means.
Claims (16)
- Lighting and/or signalling device for a motor vehicle, comprising a housing (2), a transparent element (8) at least partially closing off the housing (2) and at least one light source (3) disposed in an internal space (Vi) delimited by the housing (2) and the associated transparent element (8),
characterised by the fact that it comprises means (12) for emitting, in the internal space (Vi), initiation particles (13) able to be associated with dust particles and/or water particles in suspension in said internal space (Vi), so that the aggregates of initiation particles (13) and water or dust particles are eliminated by gravity. - Device according to the preceding claim, in which the initiation particles (13) emitted are ions.
- Device according to one of claims 1 or 2, in which the initiation particles emitted are silver iodide particles.
- Device according to one of the preceding claims, in which the means of emitting particles (12) are arranged in the rear, preferably lower, part of the housing (2).
- Device according to the preceding claim, in which, the housing comprising a rear end (6) opposite the transparent element (8), the emission means (12) are mounted on a lower portion (6A) of said rear end (6).
- Device according to the preceding claim, in which the lower portion (6A) of the rear end (6) comprising the emission means (12) is arranged below the light source (3).
- Device according to one of the preceding claims, comprising a reflector (4) interposed between the transparent element (8) and the housing (2), in which the emission means (12) are arranged behind the reflector (4), behind the latter and the housing (2).
- Device according to the preceding claim, in which the reflector (4) divides the internal space (Vi) into two in order to define a front subspace (Vi1) and a rear subspace (Vi2) in communication with each other, the emission means (12) being disposed inside the rear subspace (Vi2).
- Device according to one of the preceding claims, comprising means (14) for discharging outside the internal space (Vi2) the dust and/or water particles associated with the initiation particles (13).
- Device according to the preceding claim, in which the discharge means (14) are disposed in the lower rear part (7B) of the housing (2).
- Device according to one of claims 9 or 10, comprising a reservoir (17) in communication with the discharge means (14), which is intended to collect the dust and/or water particles associated with the initiation particles (13).
- Device according one of claims 9 to 11, in which the discharge means (14) comprise at least one opening (15) provided in one of the walls (7B) of the housing (2).
- Device according to the preceding claim, in which the opening (15) is closed off by a breathing membrane (16), able to allow the water particles associated with the initiation particles (13) to pass from the internal space (Vi) to the outside thereof.
- Device according to one of claims 9 to 12, in which the discharge means (14) comprise at least one channel, preferably in a chicane.
- Motor vehicle,
characterised by the fact that it comprises at least one lighting and/or signalling device (1) as specified in one of claims 1 to 14. - Motor vehicle according to the preceding claim, in which the means (12) for emitting initiation particles are activated at least during part of the stoppage of functioning of said vehicle.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1161662A FR2984462A1 (en) | 2011-12-15 | 2011-12-15 | LIGHTING AND / OR SIGNALING DEVICE AND MOTOR VEHICLE COMPRISING SUCH A DEVICE. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2604915A1 EP2604915A1 (en) | 2013-06-19 |
EP2604915B1 true EP2604915B1 (en) | 2014-10-22 |
Family
ID=47278715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12196229.4A Active EP2604915B1 (en) | 2011-12-15 | 2012-12-10 | Lighting and/or signalling device and motor vehicle including such a device |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2604915B1 (en) |
JP (1) | JP6113488B2 (en) |
CN (1) | CN103158601B (en) |
FR (1) | FR2984462A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105333368A (en) * | 2014-06-16 | 2016-02-17 | 法雷奥照明湖北技术中心有限公司 | Illumination and/or signal indication device for motor vehicle and motor vehicle |
FR3044981B1 (en) * | 2015-12-14 | 2018-11-16 | Psa Automobiles Sa. | DEVICE FOR THE LIGHT SIGNALING OF A MOTOR VEHICLE |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB835972A (en) * | 1956-12-18 | 1960-06-01 | Raymond Marcel Gut Boucher | Method and apparatus for dispelling fog |
US3788543A (en) * | 1972-09-14 | 1974-01-29 | Us Navy | Uniform size particle generator |
US4926293A (en) * | 1986-11-26 | 1990-05-15 | Saba Mounir G | Lighting and air freshener fixture |
JPH08195104A (en) * | 1995-01-13 | 1996-07-30 | Stanley Electric Co Ltd | Lamp tool for vehicle |
CN1256860A (en) * | 1999-10-26 | 2000-06-21 | 青海省人工影响天气办公室 | Ground generator of silver iodide for artificial precipitation |
US6422729B1 (en) * | 2000-01-27 | 2002-07-23 | Honeywell International Inc. | Method and apparatus for dehydrating a vehicle lamp housing |
JP3601497B2 (en) * | 2001-10-03 | 2004-12-15 | 松下電器産業株式会社 | High frequency device |
JP2004095526A (en) * | 2002-07-11 | 2004-03-25 | Honda Motor Co Ltd | Defogger for vehicle headlight |
KR200343108Y1 (en) * | 2003-11-13 | 2004-03-04 | 피닉스전기(주) | Illuminator |
US7262388B2 (en) | 2005-04-28 | 2007-08-28 | Illinois Tool Works Inc | Vehicle light heater |
AT502631B1 (en) * | 2005-10-31 | 2007-07-15 | Man Nutzfahrzeuge Oesterreich | HEATED VEHICLE LIGHTING |
-
2011
- 2011-12-15 FR FR1161662A patent/FR2984462A1/en active Pending
-
2012
- 2012-12-10 EP EP12196229.4A patent/EP2604915B1/en active Active
- 2012-12-14 CN CN201210544865.5A patent/CN103158601B/en active Active
- 2012-12-14 JP JP2012273161A patent/JP6113488B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN103158601A (en) | 2013-06-19 |
JP2013125751A (en) | 2013-06-24 |
FR2984462A1 (en) | 2013-06-21 |
EP2604915A1 (en) | 2013-06-19 |
CN103158601B (en) | 2017-04-12 |
JP6113488B2 (en) | 2017-04-12 |
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