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
  • 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]
• • 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
  • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
  • F21S43/26—Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
• • 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
  • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
  • F21S43/33—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors characterised by their material, surface treatment or coatings
• • 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
  • F21S43/40—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the combination of reflectors and refractors
• • 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
  • F21S43/50—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers

Definitions

• the invention relates to lighting and / or signaling devices, and more particularly relates to the so-called "lantern" function providing the rear signaling of vehicles, especially motor vehicles.
• This type of function must of course fulfill the regulatory requirements regarding luminous intensity, photometry, colorimetry and distribution of the luminous flux in the visibility space and in particular in the rear space of the vehicle as regards signaling rear lamps. ensuring the "lantern" function.
• Another requirement which is not regulatory but which becomes unavoidable, is that of the aesthetics of the lighting and / or signaling functions.
• the components generating the light beams, their associated optics and their renderings for an outside observer participate in the visual signature of a vehicle model and / or its mark and may be elements that fall within the selection criteria at the time of the inspection. act of purchase of a vehicle.
• light and / or signaling device is understood here to mean a device or equipment comprising a reflector, arranged in such a way as to send light rays coming from a bulb-type light source to a given direction. a plurality of light sources such as light emitting diodes (or LEDs).
• FIG. 1 illustrates a left front optical block 1 of a vehicle automobile in which is implanted a signaling device 2 of the state of the art.
• This optical unit 1 and its lighting device 2 are described in the document FR2960639.
• the signaling function is performed from a bar 3 shaped to present faces 4 of generally parabolic, adjacent, defining as many reflectors 5 than faces 4.
• the parabolic faces 4 of the reflectors 5 are respectively connected to each other by optically neutral junction elements 6.
• An electronic circuit 7 in the form of a printed circuit board (PCB), supports a plurality of LEDs 8 arranged so that their active surfaces 9 respectively face the center of each parabola 4 to create a plurality of oriented light beams 10 towards a screen not shown, able to diffuse light received on the entire surface of the screen.
• the junction elements 6 do not receive a light beam generated by the LEDs 8.
• junction elements 6 reveal, for an observer located at the front of the vehicle, and facing the screen, as many dark areas as junctions 6. This results in a degradation of the homogeneity of the lighting function and / or signaling and therefore rendering these functions, which creates an unsightly effect, and detracts from the overall impression of quality.
• the invention therefore aims to propose an alternative solution that improves the situation.
• a lighting and / or signaling device comprising a plurality of adjacent light sources capable of emitting light rays, a reflector arranged facing the plurality of light sources and able to reflect the light rays emitted by the plurality of light sources and a screen adapted to receive and diffuse the light rays reflected by the reflector, characterized in that said reflector is shaped to have a single concave reflecting surface, extending opposite the plurality of light sources. light and whose dimensions are adapted to illuminate at least one predefined pattern on the screen.
• the reflective face of the reflector comprises a variable radius curvature.
• the radius of curvature follows a parabolic profile.
• the reflecting face defines a reflecting sheet of white color.
• the reflective ply is obtained by profiling.
• the reflector is obtained after molding of an insert on, or integral with, the housing; the reflecting face being a layer of light reflective material attached to the concave portion of the reflector or tinted in the mass.
• the reflecting face is white.
• the screen is sandblasted or grained or opaline to define light patterns of determined shapes on the screen.
• the light sources are LEDs supported by the same printed circuit board (38) extending along the large dimension of the reflector.
• the invention has another object, a vehicle rear light, characterized in that it comprises at least one lighting and / or signaling device as described above.
• FIG. 1 already described, illustrates in a perspective view, a part of an optical unit equipped with a lighting device according to the state of the art
• FIG. 2 already described, schematically illustrates a detail view of the lighting device of FIG. 1;
• FIG. 3 illustrates in a perspective view a rear light of a motor vehicle equipped with a lighting device according to the invention
• - Figure 4 schematically illustrates the rear light of Figure 3 in a cross-sectional view along the cutting axes IV-IV of Figure 3;
• FIG. 5 illustrates, in a perspective view, a profiled reflector of a lighting device according to the invention.
• the invention aims to provide a lighting device whose screen provides a uniform illumination.
• the lighting device is intended for the lighting function of "lantern” type and is part of a vehicle rear light, possibly of the automotive type .
• the lighting device can be DRL type ("Daytime running Light (Gold Lamp)") to be automatically put into operation (or on) when the vehicle that team begins to advance.
• DRL type Daytime running Light (Gold Lamp)
• Other applications outside the automotive field are also possible
• FIG. 3 illustrates, in a perspective view, a left rear light 100 of a motor vehicle equipped with a lighting device 20 according to the invention, which is intended to perform the "lantern" function.
• FIG. 4 schematically illustrates the rear light of FIG. 3 in a cross-sectional view along the cutting axes IV-IV of FIG. 3.
• the rear light 100 comprises a housing 30 sealingly enclosing several lighting and / or signaling functions.
• the two chambers 31 and 32 are separated by a horizontal partition wall 33 partially closing the chambers 31 and 32 to leave a central passage 34 between the two chambers 31 and 32.
• the two chambers 31 and 32 are sealed by a common ice 35 or by two separate windows specific to each chamber 31 or 32.
• the rear face 36 of the upper half 31 of the housing 30 supports a light source 37 of the bulb type to achieve, for example, the function "stop light".
• the first chamber 31 channels the light emitted by the source towards the outside of the light 100 protected by the ice 35.
• the partition wall 33 of the first and second chambers 31 and 32 supports, in the vicinity of the rear face 36 of the housing 30, a printed circuit board 38 in the form of a bar, itself supporting a plurality of LEDs 39.
• the bar 38 extends in the plane of the partition 33, perpendicularly to the window 35 and is arranged to present the active surfaces 40 of the LEDs 39 facing the lower face 41 of the housing 30.
• LED lighting is dedicated to the "lantern" function.
• a single reflector 50 is disposed and fixed inside the second chamber 32 and extends in a direction parallel to the bar 38 between the bar 38 and the lower face 41 of the housing 30.
• the reflector 50 is arranged to return all the light rays, emitted by the LEDs 39 in a first generally vertical direction, towards the lens 35 in a second horizontal general direction.
• the reflector 50 is in the form of a sheet obtained for example by profiling a plastic material such as ABS. -PC whose face 51, intended to be opposite the active surfaces 40 of the LEDs 39, is covered with a light reflecting layer or tinted in the mass of the reflector 50.
• the color of the reflecting face 51 is preferably selected "White”: color that "bursts” the light reflected on the face 51 and reinforces the homogenous appearance of the lighting of a screen in comparison with a reflecting surface of "aluminum” color that can favor "hot spots” otherwise says more reflective areas than others.
• the dimensions and the shape of the reflecting face 51 which in the embodiment can be confused with the sheet 50 itself, are determined so as to obtain the lantern function with a specific visual effect for an observer located at the rear of the vehicle and therefore in front of the taillight 100.
• the lantern function is restored by a convex screen 60 arranged and fixed in the second chamber 32 of the housing 30.
• the lower portion of the convex shield 60 rests on the lower peripheral edge of the housing 30 and its side edges conform to the side edges of the housing 30.
• the upper part of the screen 60 stops inside the housing substantially in the center of the second chamber 32 and below the horizontal partition wall 33 so as to leave a passage between the partition 33 and the screen 60 .
• the screen 60 defines light patterns in the general shape of two concentric half-rings 61 and 62: a luminous half-ring 61 and an outer luminous half-ring 62.
• the two patterns 61 and 62 are made on the screen 60 by known techniques of sanding, graining or use of an opaline material or any other method or material capable of diffusing a beam bright uniformly over the entire surface of patterns 61 and 62.
• the two half-rings 61 and 62 are separated by an area 63 opaque to the light advantageously highlighting the patterns 61 and 62 when they are illuminated.
• the dimensions and the shape of the reflective surface 51 of the reflector 50 - length L (along Y), width l (along X), height H (along Z) and radius of curvature R - are adapted to receive, on the one hand, all the light rays emitted by the plurality of LEDs 39 and, secondly, to return said rays to the patterns 61 and 62 of the screen 60 with the minimum loss of luminous flux.
• the reflective layer 50 has a radius of curvature R progressively increasing from its upper part to its characteristic lower part of a parabolic form.
• the reflector 50 may constitute an integral part (material coming by molding) of the casing 30 or it may be an attached molded part which is housed in the casing 30.

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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)
• Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=51518997

Family Applications (1)

Country Status (4)

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Citations (7)

Family Cites Families (15)

• 2014
  • 2014-06-19 FR FR1455627A patent/FR3022608B1/fr active Active
• 2015
  • 2015-06-01 EP EP15732826.1A patent/EP3158258B1/de active Active
  • 2015-06-01 CN CN201580032827.3A patent/CN106662303B/zh active Active
  • 2015-06-01 WO PCT/FR2015/051436 patent/WO2015193575A1/fr active Application Filing

Patent Citations (7)

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