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
  • F21S45/10—Protection 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
  • F21S41/50—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers

Definitions

• the invention relates to lighting devices which comprise a lens and which are exposed to sunlight.
• the term "lighting device” is understood here to mean a luminous device capable of providing at least one illumination function, chosen from among the lighting and signaling.
• Some systems which are at least from time to time exposed to the sun, include at least one lighting device having a lens participating in an illumination function. This is for example the case of certain vehicles, possibly of the automotive type.
• This lens is housed in a space that is partially delimited by a partition of a plastic part which defines in particular a functional and / or decorative mask, and by an ice (glass or plastic).
• the lens may at times receive incident solar rays that have passed through the ice. This reception depends on the relative position of the lighting device (and thus the system it equips) relative to the sun.
• the paths of these solar rays are deflected (focused) by the lens towards an area that includes a portion of the partition of the mask defining part.
• the impacts of these deflected solar rays on this part of partition locally cause a very strong increase in temperature, especially when the color of the partition is black, which induces degradation or melting of the plastic material.
• the partition portion may be coated with a reflective layer (for example a metallization) intended to reflect a large part of the deflected solar rays. But this changes the appearance of the partition, even its color, which is detrimental to aesthetics.
• a reflective layer for example a metallization
• Another solution consists in removing from the lens the partition defining the mask so that the deflected solar rays are no longer substantially focused on it. But this induces an increase in the dimensions and weight of the lighting device, which is rarely acceptable.
• Yet another solution is to create a wall above and on the outside of the lens to prevent sunlight from reaching it. But this induces an increase in the size and weight of the lighting device, and is disadvantageous in terms of aesthetics.
• the invention therefore aims to improve the situation.
• a lighting device comprising a first part comprising a first partition which partially delimits a first space accommodating a lens which participates in a first illumination function and which is capable of focusing solar rays substantially in a predefined part of the first partition.
• its first partition comprises an opening encompassing the predefined part so that the solar rays issuing from the lens terminate in an unfocused manner in a selected zone of the second partition.
• the lighting device according to the invention may comprise other characteristics that can be taken separately or in combination, and in particular:
• the first partition may comprise a face oriented towards the lens and having a chosen color
• the second partition may comprise a face oriented towards the first partition and having this chosen color; the color chosen may be black;
• its second piece may at least partially delimit a second space which is located next to the first
• its second part may surround the lens to provide a mask function.
• the second partition is an extension of this mask, placed behind the first
• - Its lens can be semi-elliptical.
• the invention also proposes an optical unit comprising at least one lighting device of the type of that presented above.
• the invention also proposes a vehicle, possibly of automobile type, and comprising at least one optical block of the type of that presented above.
• FIG. 1 schematically illustrates, in a perspective view of the front side, a small portion of an optical unit comprising a first exemplary embodiment of a lighting device according to the invention
• FIG. 2 schematically illustrates, in a perspective view of the front side, a part of the lighting device of FIG. 1, without the first part and before it is integrated in an optical unit,
• FIG. 3 schematically illustrates, in a perspective view of the front side, a part of a second exemplary embodiment of a lighting device according to the invention, without the first part and before its
• FIG. 4 schematically illustrates, in a sectional view along the axis IV-IV of FIG. 1, a part of the optical block of FIG.
• the invention aims in particular to provide a lighting device D for filling at least one lighting function (lighting or signaling).
• the lighting device D is intended to be part of an optical block BO (very partially shown in FIGS. 1 and 4) of a vehicle. , possibly of automotive type. But the invention is not limited to this application. Indeed, a lighting device D, according to the invention, can equip any type of system, equipment, device or device, including interior or exterior walls of buildings.
• optical block BO can be both a headlight (or headlight), a rear light.
• FIGS. 1 and 4 show schematically a portion of an optical block BO comprising a first exemplary embodiment of a lighting device D according to the invention.
• This optical block BO comprises a LV box (very partially illustrated) housing the lighting device D.
• a lighting device D comprises at least a first piece P1, a lens L and a second piece P2.
• the first piece P1 comprises a first partition C1 which partially defines a first space E1 housing a lens L which participates in a first illumination function.
• this lens L is of semi-elliptical shape.
• this lens L is placed behind a light source (not shown) in order to shape in a predefined manner (depending on its first illumination function) the photons it delivers.
• This light source has a technology that depends on the first lighting function in which it participates.
• this first illumination function can be a function of low beam (or code) and / or high beam.
• the first partition C1 is placed to the right of the lens L. Therefore, the left part of the first space E1 is here delimited by an ice (glass or plastic), not shown and by which can penetrate the incident solar rays.
• the lighting device D can also and optionally comprise an additional metallized mask R placed in the extension of the lens L in the vicinity of its mask ML and intended to reflect the photons. .
• the first partition C1 defines for example a mask whose at least the face which is oriented towards the lens L has a chosen color, for example black.
• the first piece P1 can be made by molding or injection of a plastic or synthetic material, such as PMMA.
• the periphery of the lens L is preferably surrounded by a piece ML which defines a mask against which an edge of the first piece P1 (and
• this mask ML is preferably identical to that of the first partition C1 (here black).
• the lens L focuses solar rays incident substantially in a predefined part of the first partition C1, as illustrated in FIG. 4.
• the invention proposes that the latter (C1) comprises an opening OP encompassing its predefined part. Moreover, for this opening OP to be visible, the invention proposes, as illustrated in FIGS. 1 to 4, to place a second partition
• This second partition C2 is advantageously a part which is added to a second part P2 forming part of the lighting device D and already ensuring
• the solar rays deflected by the lens L pass through the opening OP, where they are substantially focused by this lens L, and end in a non-focused manner in a selected zone Z of the second partition C2 which is placed a short distance behind the first partition C1.
• these solar rays arrive defocused on the chosen zone Z (see FIG. 4), they are no longer liable to locally induce degradation, either on the first partition C1 or on the second partition C2.
• At least the face of the second partition C2, which is oriented towards the first partition C1 may have the chosen color of the face of the first partition C1 which is oriented towards the lens L.
• this selected color is black as indicated above.
• the second piece P2 can be made by molding or injection of a plastic or synthetic material, such as PMMA.
• the second piece P2 delimits at least partially a second space E2 which is situated next to the first space E1 and which houses at least one element
• the second partition C2 thus constitutes an extension of this second piece P2 which is placed behind the first partition C1.
• this second illumination function can be a function of position (or pilot) or fog lamp
• warning light or flashing light
• DRL daytime running light
• the second piece P2 is the mask ML which surrounds the periphery of the lens L, and therefore the second partition C2 constitutes an extension of this mask ML which is placed behind the first partition C1.
• a third piece P3 at least partially delimits a second space E2 which is located next to the first space E1 and which houses at least one element
• This third piece P3 is possibly part of the lighting device D.
• the invention offers several advantages, among which: it avoids having to integrate an additional piece in the lighting device, and therefore does not induce an increase in its bulk,

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Non-Portable Lighting Devices Or Systems Thereof (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=49998402

Family Applications (1)

Country Status (5)

Cited By (1)

Citations (6)

Family Cites Families (3)

• 2013
  • 2013-10-04 FR FR1359654A patent/FR3011517B1/fr not_active Expired - Fee Related
• 2014
  • 2014-09-29 ES ES14787225.3T patent/ES2643486T3/es active Active
  • 2014-09-29 CN CN201480054479.5A patent/CN105637286B/zh active Active
  • 2014-09-29 EP EP14787225.3A patent/EP3052854B1/fr active Active
  • 2014-09-29 WO PCT/FR2014/052442 patent/WO2015049444A1/fr active Application Filing

Patent Citations (6)

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