Classifications

• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
  • G02B6/24—Coupling light guides
  • G02B6/26—Optical coupling means
  • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
  • G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
  • G02B6/2821—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using lateral coupling between contiguous fibres to split or combine optical signals
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
  • B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
  • B60Q3/60—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by optical aspects
  • B60Q3/62—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by optical aspects using light guides
  • B60Q3/64—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by optical aspects using light guides for a single lighting device
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
  • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
  • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
  • G02B6/0033—Means for improving the coupling-out of light from the light guide
  • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
  • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces

Definitions

• Lighting device especially for a motor vehicle.
• the present invention relates to a lighting device, especially for a motor vehicle. It is particularly intended to illuminate the interior of the cabin.
• patent application DE102006035508A discloses a lighting guide arranged on the back of the front seat of a vehicle.
• the linear light guide is coupled to a light emitting diode, and can be used by the occupant sitting at the rear of the car.
• the object of the invention is to provide a simple device using only one lighting guide capable of illuminating independently different parts of the cabin.
• the invention proposes a lighting device, especially for a passenger compartment of a motor vehicle, comprising a lighting guide capable of illuminating all or part of the passenger compartment, and two coupling guides associated with the lighting guide, each coupling guide being configured to bring a light beam from a light source into said illumination guide, said device being configured so that zones of the illumination guide are ignited independently from each other by each of said light beams .
• the output ends of the coupling guides penetrate tangentially into the lighting guide, the rays issuing from said coupling guides having an angle of incidence allowing reflection of the light in said lighting guides, and output ends are arranged along the illumination guide, so that the propagation directions of each beam are opposite each other at the output of the coupling guide.
• This provides a lighting device that, with a single lighting guide, provides areas that can light independently of each other. It thus allows to illuminate different parts of the passenger compartment of a car while having a small footprint.
• This device also provides an original aesthetic dimension, thanks to the uniqueness of the lighting guide, some areas can be lit while others remain off.
• the lighting guide is a linear guide
• the coupling guides are linear channels provided with an input end and an output end of the light beam
• the coupling guides have a section whose value increases from the input end to the output end
• the coupling guides have, at their outlet end, a surface section smaller than or equal to that of the lighting guide,
• the coupling guides and the lighting guide are formed of a single material, the coupling guides are arranged in a plane substantially perpendicular to the direction of propagation of the light outside the device,
• said lighting guide comprises patterns of reflection of light
• said light reflection patterns make it possible to reflect the light in different directions according to the zone of the lighting guide, in order to illuminate the passenger compartment in different directions,
• said reflection patterns are prisms
• said prisms have different angles of reflection according to the zone of the lighting guide, in order to illuminate the passenger compartment in different directions.
• FIG. 1 schematically illustrating a view from above of a lighting device according to the invention
• FIG. 2 schematically illustrating a view from above of a portion of the lighting device according to the invention, represented with the path of the light beams,
• FIG. 3 schematically illustrating a perspective view of a part of the lighting device according to the invention
• FIG. 4 schematically illustrating a perspective view of a detail of the lighting device according to the invention, shown with the path of the light beams.
• the invention relates to a lighting device 1 comprising a lighting guide 2 capable of illuminating all or part of the passenger compartment.
• Said lighting guide 2 is monobloc and / or formed of a single material. Thus, the light propagates naturally by total reflection within said lighting guide 2, without obstacles or separations between parts of said guide, which could affect its circulation.
• the lighting guide 2 is a linear guide, to keep a limited volume, as well as for aesthetic reasons.
• Said lighting guide 2 is advantageously open. By this is meant that said lighting guide 2 does not loop not on himself. It is not in the form of a ring. In other words, said lighting guide 2 has free longitudinal ends.
• Said device further comprises two coupling guides 6, 7 associated with the lighting guide 2, each coupling guide 6, 7 being configured to bring a light beam 8, 9 coming from a light source 3 into said light guide.
• the light sources 3 are one or more light-emitting diodes, arranged for example on a PCB-type support, in particular an insulated metal substrate-type support.
• the coupling guides 6, 7 are linear channels provided with an input end 12 and an output end 13 of the light beam. In Figure 2, only the ends 12, 13 of a single coupling guide 6 are shown.
• the coupling guides 6, 7 serve to guide the light beams 8, 9 of the diode to the inside of the lighting guide 2. These channels guide the beams while keeping the intensity of the beam as high as possible. avoid losses.
• the lighting guide 2 provides effective illumination with a light beam even if it comes from a single diode.
• the outlet ends 13 of the coupling guides 6, 7 penetrate tangentially into the lighting guide 2, the rays issuing from said coupling guide having an angle of incidence allowing reflection of the light in the lighting guide. 2.
• the output ends 13 of the coupling guides 6, 7 merge with the lighting guide 2.
• the coupling guides 6, 7 may also have a curvature at their outlet end 13, to bring said beams progressively in a direction corresponding to the longitudinal axis of the lighting guide 2.
• the angle of incidence of the outgoing light rays the end 13 of the coupling guide should not be too small, because this would cause the passage of the beam through the light guide 2, without reflection on the wall allows to direct it inside the guide lighting 2.
• the output ends 13 are arranged along the lighting guide 2, so that the propagation directions of each beam 8, 9 are opposite each other at the output of the coupling guide 6, 7.
• the two beams 8, 9 propagate in opposite areas 4, 5 of the lighting guide 2. Therefore, when only one of said beams 8, 9 propagates in said lighting guide 2, only one of said Zones 4, 5 is on, the other remains off.
• the configuration of the device 1 avoids as much as possible the transfer of light rays from one zone 4 to the other.
• a first beam 8 is brought by the first coupling guide 7, and a second beam 9 is brought by the second coupling guide 6.
• the angle of incidence and the curvature of the guides The shape of the coupling guides 6, 7 and their arrangement with respect to one another gives the beams 8, 9 opposite directions of propagation.
• the two zones 4, 5 light up independently of one another.
• the outlet ends 13 are disposed substantially in the middle of the lighting guide 2, so that the two illuminating areas 4, 5 have identical dimensions. In the case where it is desired to obtain illuminating zones 4, 5 of unequal dimensions, it suffices to place the exit ends 13 along the illumination guide 2, at a point dividing the lighting guide into zones with dimensions required.
• the coupling guides 6, 7 have sections 10, 1 1 whose value increases from the inlet end 12 to the outlet end 13.
• sections 10, 1 1 d a coupling guide 6 are shown for illustrative purposes.
• the input end 12 has a smaller cross sectional area than that 1 1 of the output end 13. This feature avoids a loss of intensity of the light beam, in particular due to the curvature of the channel of the light guides 6 , 7.
• the coupling guides 6, 7 have surface sections 1 1 less than or equal to the area of the section of the lighting guide 2, in particular at the output end 13 of the light beam. Thus, it prevents a loss of intensity of the light beam during the passage of the junction between the light guides 6, 7 and the lighting guide 2.
• the coupling guides 6, 7 and the lighting guide 2 are formed of a single material, to promote the propagation of the beams 8, 9 of the coupling guides 6, 7 in the lighting guide 2. In FIG. Indeed, interfaces would cause phenomena unfavorable to the propagation or transfer of light beams 8, 9.
• said lighting guide 2 comprises light reflection patterns. Their function is to modify the orientation of the light rays inside the lighting guide 2, so that they strike an exit face 17 of the guide lighting 2 with an angle of incidence allowing them to exit outside the guide. As shown in FIGS. 3 and 4, these are reflection prisms 14 placed on the upper face 15 of the illumination guide 2. The prisms 14 return the light rays 16 which meet them through the guide of FIG. lighting 2, with an angle of incidence sufficiently low that they exit the lighting guide 2 by the exit face 17.
• said prisms 14 have different angles of reflection according to the zones 4, 5 of the lighting guide 2.
• the angles of reflection are defined between the main direction of the beam in the lighting guide and the main direction of the beam Release.
• the angles of reflection define an orientation of the illumination beam, and therefore of the portion of the passenger compartment that area 4, 5 of the lighting guide 2 will illuminate.
• the device 1 mainly illuminates a portion of the passenger compartment disposed below the device 1.
• Other angle values make it possible to orient the main direction of the output beam of each zone.
• the zones 4, 5 have prisms 14 whose angle values are different from one zone to another, for example opposite.
• angles of the prisms 14 are identical within the same zone in order to keep a uniform light beam.
• the coupling guides 6, 7 are arranged in a plane substantially perpendicular to the direction of propagation of the light out of the device 1.
• the device 1 is easier to integrate in a ceiling knowing that it must illuminate down.
• the number of coupling guides is not limited to two. Several coupling guides can be envisaged for each zone of the lighting guide. The number of zones of the lighting guide is not limited to two. It is possible to envisage a lighting guide composed of several linear portions, for example in the form of a cross.

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (AREA)
• Planar Illumination Modules (AREA)
• Light Guides In General And Applications Therefor (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=48128382

Family Applications (1)

Country Status (4)

Cited By (1)

Families Citing this family (5)

Citations (8)

Family Cites Families (4)

• 2012
  • 2012-09-26 FR FR1259024A patent/FR2995971B1/fr active Active
• 2013
  • 2013-09-20 EP EP13765728.4A patent/EP2900520A1/de not_active Ceased
  • 2013-09-20 CN CN201390000777.7U patent/CN204687953U/zh not_active Expired - Lifetime
  • 2013-09-20 WO PCT/EP2013/069562 patent/WO2014048847A1/fr active Application Filing

Patent Citations (8)

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