FR3009364A1 - LIGHTING AND / OR SIGNALING DEVICE FOR MOTOR VEHICLE - Google Patents

Abstract

The present invention relates to a lighting and / or signaling device (1), in particular a front and / or rear light, of a motor vehicle, comprising a housing (3) and an ice-cream (5) delimiting with said housing (3). an internal volume in which is disposed at least one mask (7) of components of the device, said mask (7) being of shiny appearance and provided with at least one element configured as a projection (9) to deflect all or part of spokes solar incident i on the device outside the visual field of drivers of vehicles crossing and / or following said vehicle.

Description

Lighting and / or signaling device for a motor vehicle. The present invention relates to lighting and / or signaling devices, including headlights and / or rear lights, motor vehicles. It is known that such lighting devices are conventionally composed of a housing closed by an ice and thus delimiting an internal volume in which there are components that participate in the generation of a light beam intended to be projected on the road taken by the vehicle.

It is also known to use masks arranged in the housing to hide the mechanical and electrical part of the components of the light source. Many of these masks are smooth and aluminized to enhance their shiny appearance when viewed from the outside. These configurations can generate false signals when these devices are illuminated by the sun as shown in Figure 1 which illustrates a lighting device of the prior art. Indeed, the sunlight along the incident rays i is reflected in part on the mask and spring towards the next vehicle or coming in the opposite direction in a parasitic reflection along the r-rays that can be interpreted as a driving signal.

In addition, this parasitic signal can be so intense that it can make it difficult to see an authentic driving signal emitted by the lighting and / or signaling device, such as a stop light or direction indicator. The risk of a vehicle accident under these conditions is then greatly increased.

It has been proposed to reduce the effect of the sun by using dark or matte masks. Nevertheless, such masks can be damaged by the heat when the sun is concentrated on them. Moreover, such masks do not meet the demands of car manufacturers who generally prefer glossy masks.

The invention aims to overcome all or part of these disadvantages and proposes a lighting and / or signaling device, in particular a front and / or rear light, of a motor vehicle, comprising a housing, in particular a closed housing, and an ice-cream delimiting with said casing an internal volume in which is arranged at least one component mask of the device, said mask being of shiny appearance and provided with at least one element configured to project to deflect all or part of the radii solar incident on the device out of the visual field of drivers of vehicles crossing and / or following said vehicle. By "protruding" element is meant a protruding element with respect to a general surface of the mask. Thus, said lighting device makes it possible to give a shining character to the fire whose aesthetic effect is sought while reducing the annoying effect of sunlight for other drivers.

Said mask is advantageously reflective, namely that it reflects at least 30% of the incident solar radiation, or even 50% or even 70% of the incident solar radiation. In this way, the desired gloss effect is obtained. Said mask comprises, for example, a core and an aluminum layer coating said core, in particular facing outwards.

Said protruding element is advantageously made in one piece with the mask. Said protruding element may be in the form of a cap or dihedral, directed towards said mirror and / or having an upper surface configured to deflect incident solar rays above the field of view of the drivers of the cruising vehicles and / or according to said vehicle. In other words, the one or more elements configured in projection have a section formed by two sides of a triangle. Said protruding element advantageously comprises a lower surface configured to trap and / or deflect, below the field of view of the drivers of the vehicles crossing and / or following said vehicle, the incident solar rays on the mask. Said lower surface is advantageously adjacent to said upper surface. It is particularly connected by a distal edge to the latter. This distal edge and / or the other edges of said projecting element are advantageously sharp-edged, sharp or rounded, which will facilitate the manufacture of the mask. Said upper and lower surfaces are advantageously flat. Said upper surface may extend over a substantial part of the mask, for example over the width of the latter and / or over a depth such that said projecting element extends to the ice or close to that -this. Said element configured in projection is advantageously shaped to create an area of the mask, called shadow zone, visible from the outside, not reflecting incident solar rays. Said cap-shaped protruding element extends in substantial dimensions of the mask, both in width and in depth, for example to occupy 15 to 20% of the mask surface and 20 to 30% of the mask surface. mask surface with shadow area. Thus, it contributes to significantly reduce the parasitic reflection of solar radiation on the lighting device, particularly in proportion to its extent on the mask. According to a first variant, said element configured as a projection may be unique. According to another variant, said lighting device may comprise a plurality of said elements configured protruding, in the form of a cap and / or dihedron extending on said mask. These cap-shaped elements advantageously have a smaller size than that of said element configured as a single above-mentioned projection, for example 5 to 10 times smaller, extending in particular to a depth of one to ten millimeters. They can thus be more easily implanted in said housing and / or allow a reduced size of the device. Said cap-shaped protruding elements may be arranged regularly on the mask, for example parallel to each other, in particular in a horizontal direction. Thus a regular distribution of shadow areas produced by each of the cap-shaped protruding elements may be formed on the mask. They can be separated from each other by a distance corresponding in particular to the shadow area of each of them, for a given incident direction. Alternatively, these cap-shaped protruding elements may extend over the mask in the form of adjacent ribs. The ridge angle of the ribs is advantageously configured to produce multiple reflections on the ribs or even to trap the incident radiation, for example to substantially or even completely attenuate the final reflection of the incident solar radiation until no longer to obstruct the vehicle drivers at all.

The bottom angle of the ribs vis-à-vis the ice is in particular less than 60 °. Alternatively, the planar and angular portions of said projecting elements may be rounded to impart a wavy area to the mask.

Said projecting elements may thus be in the form of simple corrugations whose surface defines different reflection portions of the solar radiation as a function of the angle of the incident radiation so as to create a scattering effect of the light of the radiation. Said elements configured protruding may be arranged in a linear profile, for example oriented horizontally, vertically or obliquely, in a curved profile, parallel or not, or in a regular geometric pattern or not, or even a stamped pattern regular or not, for example triangular, pyramidal or other. These cap-shaped or corrugated elements may extend over a substantial part of the mask, or even the entire surface of the mask.

The above and other features of the present invention will appear more clearly with reference to the following description of embodiments of the invention with reference to the accompanying drawings, in which: FIG. schematic sectional view illustrating a lighting and / or vehicle signaling device of the prior art; - Fig. 2 is a schematic sectional view illustrating a vehicle lighting and / or signaling device according to a first embodiment of the present invention; FIGS. 3 to 5 are views similar to FIG. 2 of variant embodiments in accordance with the invention; and - Figure 6 is a partial perspective view of yet another alternative embodiment according to the invention. In the following, identical references designate identical or similar elements. The terms "upper" and "lower" are to be considered with reference to a relative position in the drawing relative to a vertical direction and corresponding to a positioning of the light in use on a vehicle. The lighting and / or signaling device 1 shown in FIGS. 2 to 5 is a projector for a motor vehicle. It comprises a housing 3 closed by a transparent closure glass 5 delimiting an internal volume in which is disposed at least one mask 7. The light source of the device is not detailed because well known to those skilled in the art. Said mask may be used to conceal other components of said device and / or to truncate the cone of light emitted by said light source. Said mask 7 has a reflective appearance, namely that it reflects at least 30% of incident solar radiation i, or even 50% or 70% of incident solar radiation i. As explained above, such reflection may generate for drivers of vehicles crossing and / or following the vehicle equipped with devices of the state of the art, a parasitic driving signal, for example a false stop light or may mask a flashing signal or simply dazzle drivers. Said mask 7 comprises a core and an aluminum layer coating said core, configured to give the device a bright aesthetic appearance when viewed from the outside. This brilliant character of fire is a desired aesthetic effect.

This shiny appearance could be conferred by another coating, for example a glossy paint. According to the invention, said mask 7 is provided with at least one element 9 configured to project all or part of the incident solar rays i on the device out of the visual field of the drivers of the cruising vehicles and / or according to said vehicle. The field of view of the drivers of the vehicles crossing and / or following said vehicle is considered to extend from the next vehicle or coming in the opposite direction according to a cone of vision oriented substantially parallel to a plane P of the roadway.

Said projecting element 9 is advantageously made in one piece with the mask 7, which lighten the assembly relative to a provision where it would be attached to the mask. Said mask is thus formed, for example by molding a plastic material then coated with a reflective coating such as those mentioned above.

As illustrated in FIG. 2, said projecting element 9 may be in the form of a cap or dihedral, relatively prominent here, directed towards said window 5. It has an upper surface 11 configured to deflect the incident solar rays i, notably a solar radiation angle of incidence has close to 45 ° of the plane P as shown, or higher and therefore large light amplitude. The deflection of the rays is carried out above the field of view of the drivers of vehicles crossing and / or following said vehicle. In other words, this reflection along the radii r is carried out here upwards, according to a reflection angle 13 greater than about 90 ° and in particular about 130 ° relative to the plane P, as shown. Said upper surface 11 may extend over a substantial part of the mask 7, for example over the width of the latter and / or over a depth suitable for extending to or near the ice 5 last. Thus, said depth may be between 1 and 5 cm depending on the dimensions of the lighting device. Said projecting element 9 also comprises in the present case a lower surface 13 configured to trap and / or deviate below the field of view of the drivers of the vehicles crossing and / or following said vehicle the incident solar rays i on the mask 7. The incidental low angle rays a ', lower than 45 ° as herein, are in particular deflected downwards along the r-rays-out of the field of view of the drivers of the cruising vehicles and / or following said vehicle. Said lower surface 13, adjacent to said upper surface 11, is in particular connected by a distal edge 15 to the latter. This edge 15 is here in the form of a sharp edge, straight. Said upper 11 and lower 13 surfaces are advantageously flat, being angularly oriented to deflect and / or entrap the incident solar rays i 'on the mask, outside the field of view of said drivers of cruising vehicles and / or according to said vehicle. The upper surface 11 is here substantially horizontal, or even slightly inclined downwards, for example at an angle of 5 to 15 ° relative to the plane P. This inclination allows in particular to reflect upward incident solar radiation i on the device, whose angle of incidence on the mask, for example 45 ° relative to the plane P, could be reflected without it substantially in the direction of the plane P and thus in the direction of drivers of vehicles crossing and / or following said vehicle. As already seen, the reflected radiation r is instead oriented substantially 130 ° to said plane P. The radiation reflected by Project the upper surface 11 is thus far removed from the field of view of drivers of vehicles crossing and / or following said vehicle. The lower surface 13 is oriented at an angle of between 20 and 50 ° relative to the plane P, for example 40 °, which delimits relative to a boundary incident solar ray i, in broken line, passing at the level of the distal edge An area of the shadow mask 17, in bold line on the drawing, when viewed from the outside. Said shadow zone also depends on the depth of said projecting element. The extent of this shadow zone 17 is a function of the angle of incidence of solar radiation i, being delimited at the lower level by the latter. This zone 17 does not reflect the solar radiation and thus increases the surface of the inoperative mask 7 to an inconvenient reflection for the drivers of vehicles. This surface is not negligible. Indeed, said cap-shaped protruding element 9 extends in substantial dimensions of the mask 7, both in width and depth, for example to occupy 15 to 20% of the surface of the mask and 20 at 30% of the surface of the mask with the shadow zone 17. The parasitic solar reflection is thus reduced in proportion to this area relative to that of the mask. Said projecting element 9 may be single, even double or triple until it occupies most of the surface of the mask 7 and thus suppress or almost the parasitic reflection. Said lighting device 1 may also comprise, as illustrated in FIG. 3, a plurality of cap-shaped protruding configuration elements 9 extending over the mask 7. These cap-like elements 9 have a smaller format than That of said single protruding element previously described, for example 5 to 10 times smaller, particularly in depth. These elements can indeed extend, in cross section relative to the surface of the mask 7, to a depth of one to ten millimeters. Said cap-shaped protruding elements 9 may be arranged in a regular manner on the mask 7, for example parallel to each other, in particular in a horizontal or close direction, or not. Thus a regular distribution or not of shaded areas 17 produced by each of the elements configured protruding cap-shaped 9 may be formed on the mask 7. They may in particular be separated from each other by a corresponding distance to the shadow zone 17 of each of them as shown here, the latter being delimited by incident solar radiation reference of about 45 °, as in the previous case. Such elements configured protruding 9 can thus be more easily implanted in said housing 3 and / or allow a small footprint of the device. It is also easier to arrange these projecting elements over a substantial part of the mask, especially at least half, if not all, of the surface of the mask. Another variant embodiment of the invention is shown in FIG. 4. In this variant, the projecting elements 9 extend on the mask 7 such as adjacent ribs. The edge angle of the ribs, external and / or internal, is advantageously configured to produce multiple reflections on the ribs, or even to trap the incident radiation i, for example to substantially or even completely attenuate the final reflection. incident solar radiation to no longer interfere with the vehicle drivers. Indeed, each reflection attenuates the luminous amplitude of the radiation reflected relative to that of the incident ray.

The bottom angle of the ribs vis-à-vis the ice is particularly less than 60 ° to promote multiple reflections. Angular portions of said projecting elements 9 of the aforementioned embodiments may be rounded, in particular at their edges 15, which facilitates the manufacture of said projecting elements.

As shown in FIG. 5, said projecting elements 9 may also be in the form of corrugations whose surface defines different reflection portions of the solar radiation depending on the angle of the incident radiation so as to create an effect. diffusing light. This configuration reduces the spurious reflection effect for the drivers of vehicles crossing and / or following said vehicle. Said projecting elements 9 may be arranged in a linear profile, for example oriented horizontally as illustrated, vertically or obliquely, which may deflect the radiation on the side of the vehicle and therefore out of the field of view of drivers of cruising vehicles and / or following said vehicle. Another aesthetic effect of the device can still be obtained by producing a curved profile, parallel or not the elements configured projection 9. It can still achieve a regular geometric pattern or not, even a stamped pattern regular or not, for example triangular, or pyramidal regular as shown in Figure 6 or other. In this latter embodiment, where the surfaces of the projecting elements are rounded to form corrugations, a scattering effect of reflection is realized. In the last two embodiments mentioned, said elements configured protruding advantageously have a depth of at least one millimeter, including a depth of between one and ten millimeters. The invention thus provides an opportunity to reduce parasitic solar radiation reflections in lighting and signaling devices, motor vehicles.

Claims (15)

REVENDICATIONS1. Lighting and / or signaling device (1), in particular front and / or rear light, of a motor vehicle, comprising a housing (3) and an ice-cream (5) delimiting with said housing (3) an internal volume in which at least one mask (7) of components of the device is provided, said mask (7) being of shiny appearance and provided with at least one protruding element (9) for deflecting all or part of incident solar rays i on the device outside the visual field of drivers of vehicles crossing and / or following said vehicle. 2. A lighting and / or signaling device (1) according to claim 1, wherein said mask (7) is reflective. 3. A lighting and / or signaling device (1) according to one of claims 1 or 2, wherein said mask (7) comprises a core and an aluminum layer coating said core. 4. Lighting and / or signaling device (1) according to any one of claims 1 to 3, wherein said protruding element (9) is made in one piece with the mask (7). Lighting and / or signaling device (1) according to any one of the preceding claims, wherein said protruding element (9) is cap-shaped, facing said ice-cream (5) and / or comprising an upper surface (11) configured to deflect incident solar rays i above the visual field of drivers of cruising and / or following vehicles. The lighting and / or signaling device (1) according to claim 5, wherein said upper surface (11) extends over the width of the mask (7) and / or to a depth suitable for said projecting element extends to ice (5) or near. A lighting and / or signaling device (1) according to any one of claims 5 or 6, wherein said projecting element (9) has a bottom surface (13) configured to trap and / or deflect, below the visual field of the drivers of the vehicles crossing and / or following said vehicle, the incident solar rays i 'on the mask. The lighting and / or signaling device (1) according to claim 7, wherein said bottom surface (13) is adjacent to said upper surface (11). The lighting and / or signaling device (1) according to claim 7 or 8, wherein said lower surface (13) is connected by a distal edge (15) to said upper surface (11). The lighting and / or signaling device (1) according to claim 9, wherein said distal edge (15) is sharp or rounded. Illumination and / or signaling device (1) according to any one of claims 7 to 10, wherein said protruding element is shaped to create a zone of the mask, said shadow zone (17), visible from the outside, not reflecting incident solar rays. 12. A lighting and / or signaling device (1) according to any one of claims 5 to 11, comprising a plurality of said cap-shaped protruding shaped elements (9) extending on said mask (7). Lighting and / or signaling device (1) according to claim 12, wherein said cap-shaped protruding shaped elements (9) extend over the mask (7) in the form of adjacent ribs (9). . 14. A lighting and / or signaling device (1) according to claim 13, wherein the edge angle of the ribs (9) is configured to produce multiple reflections on the ribs, or even trap the incident radiation i. Lighting and / or signaling device (1) according to any one of Claims 1 to 4, in which the said projecting elements (9) are in the form of corrugations, the surface of which defines different reflection portions. solar radiation as a function of the angle of the incident radiation so as to create a scattering effect of the radiation light.