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]
• • 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
• • 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]
  • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
• • 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
  • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
  • F21S41/24—Light guides
• • 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
  • F21S43/235—Light guides
  • F21S43/236—Light guides characterised by the shape of the light guide
  • F21S43/239—Light guides characterised by the shape of the light guide plate-shaped
• • 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
  • F21S43/235—Light guides
  • F21S43/242—Light guides characterised by the emission area
  • F21S43/243—Light guides characterised by the emission area emitting light from one or more of its extremities
• • 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
  • F21S43/235—Light guides
  • F21S43/249—Light guides with two or more light sources being coupled into the light guide
• • 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
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
  • F21Y2107/00—Light sources with three-dimensionally disposed light-generating elements
  • F21Y2107/90—Light sources with three-dimensionally disposed light-generating elements on two opposite sides of supports or substrates
• • 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
  • G02B6/0045—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 by shaping at least a portion of the light guide

Definitions

• the invention relates to a lighting system, in particular for a lighting member of a motor vehicle with a printed circuit board in the plane of the lighting direction.
• Some lighting systems include a printed circuit board equipped with light-emitting diodes, commonly called LED (light emitting diode), electrically connected to the printed circuit.
• a printed circuit board often designated by the acronym PCB (Printed Circuit Board)
• PCB Printed Circuit Board
• This plate is flat and consists of an assembly of one or more thin layers of copper separated by an insulating material. Such a plate can be rigid or flexible.
• a printed circuit board or plate equipped with LEDs is generally arranged perpendicular to the desired illumination direction for good light rendering, the majority of the light beam being emitted by the diodes in one direction. perpendicular to the printed circuit board.
• a printed circuit board or plate equipped with LEDs is generally arranged perpendicular to the desired illumination direction for good light rendering, the majority of the light beam being emitted by the diodes in one direction. perpendicular to the printed circuit board.
• such positioning perpendicular to the lighting direction imposes a large size on the projector and design constraints.
• the object of the invention relates to a lighting system, in particular for a motor vehicle headlamp, comprising a rigid printed circuit board equipped with light-emitting diodes, characterized in that the rigid plate is arranged parallel to a direction predetermined illumination of the lighting system and in that the illumination system comprises a shaped optical module for propagating and guiding the light beams emitted by the light-emitting diodes so that each light beam coming out of said optical module is parallel or substantially parallel to the lighting direction.
• Each light beam consisting of all the light rays from a light emitting diode, is thus propagated and guided in the desired direction.
• a light-emitting diode generally emits a plurality of light rays in several directions: the light beam consisting of these rays thus generally has a conical shape.
• the direction of a light beam is considered as the direction of the axis of symmetry of the cone delimiting the light beam.
• the light beam is parallel (or substantially parallel) to a lighting direction, when the axis of symmetry of the cone defining it is parallel (or substantially parallel) to the illumination direction.
• the arrangement according to the invention makes it possible to reduce the size of the lighting system with respect to a lighting system in which the rigid printed circuit board is oriented perpendicular to the desired lighting direction. This gain in size can thus reduce the weight of an organ equipped with such a lighting system and design such a body with complex stylistic forms.
• the lighting system provides a good quality of lighting and in particular a uniform illumination.
• the lighting system may comprise a single printed circuit board.
• the rigid plate may be equipped with light-emitting diodes on each of its faces, which makes it possible to distribute the emission of the light beams on either side of the rigid plate.
• the positioning of the optical module with respect to the light-emitting diodes may be chosen to allow the optical module to capture most of the light radiation emitted by the light-emitting diodes.
• the optical module may be positioned so as to capture 70 to 100% of the light radiation emitted by the light-emitting diodes, preferably from 80 to 100% of the radiation, or even from 90 to 100% of the radiation.
• the light module can thus be located at a distance of about 0.5 to 5 cm from the light emitting diodes.
• the optical module may be shaped so as to follow the light beams emitted by the light-emitting diodes with a path formed of a first portion perpendicular to the rigid plate and a second portion parallel to the rigid plate, a free end of the first part being positioned facing light-emitting diodes so as to capture said light beams, the second part having a free end arranged to let the light beams out substantially parallel to the lighting direction.
• the light beams enter the optical module via the free end of the first part and leave the optical module via the free end of the second part.
• This configuration "right angle" has the advantage of being simple to achieve.
• first and second portions of the optical module may be connected by a shaped portion to reflect a light beam from the first portion towards the second portion.
• This part may be a simple plane outer surface suitably oriented and forming a diopter.
• an outer plane surface forming a diopter means an outer surface which is not covered by another material than that forming the optical module and which is not in contact with any other material. In other words, this outer surface is in contact with the ambient air only.
• Such an arrangement has the advantage of not requiring the addition or integration of a baffle element to the optical module: the reflector element is formed in the optical module, which reduces the manufacturing cost of the optical module and to facilitate its manufacture.
• the reflection of the light beam is then obtained by virtue of the difference in value between the refractive index of the material constituting the optical module, within which the light rays to be reflected, and the refractive index of the adjacent air. on the flat outer surface.
• the position of the outer planar surface with respect to the first and second parts, and in particular its orientation, can then be determined by the laws of Snell and Descartes as a function of these refractive indices, preferably so as to completely reflect the incident radiation.
• the optical module may be formed of at least one element of polymeric or glass material, preferably translucent or transparent, capable of propagating and guiding a light beam flowing inside its volume, in particular a light beam emitted by a light emitting diode.
• the material used may be any material adapted to guide a light beam, such as a glass or polymer material, colored or not, for example polycarbonate or poly (methylmethacrylate) (PMMA).
• PMMA poly (methylmethacrylate)
• said at least one polymeric material element comprises at least one surface shaped to reflect a light beam from a direction substantially perpendicular to said rigid plate to a direction substantially parallel to the illumination direction.
• This surface may be an inclined surface at an angle of 45 ° with respect to the direction of the incident light beam, said surface possibly being covered with a layer capable of reflecting said incident light beam, for example a metal layer.
• a single element made of polymeric material may be provided per array of diodes.
• the invention is however not limited to a particular light emitting diode arrangement.
• one or more masks may be arranged so as to partially or completely fill any space separating the elements of polymer material on the optical module side through which the light beams emerge, thus making it possible to define a particular form, which will be perceived by the users.
• These masks also make it possible to conceal technical parts located behind these masks and whose vision from outside the lighting system is undesirable.
• the invention also relates to a lighting member of a motor vehicle equipped with a lighting system according to the invention.
• This lighting member may in particular be chosen from a projector for signaling the vehicle and a mood light intended to be located inside the passenger compartment.
• the member is a projector.
• a lighting member usually comprises a housing whose one face is translucent or transparent for the output of the light beam.
• the rigid printed circuit board is then placed inside the housing and fixed to the latter, the direction of the lighting system being such that the light beams emerge from the translucent or transparent face of the housing.
• Another object of the invention relates to a motor vehicle equipped with at least one lighting system according to the invention.
• said lighting system can equip at least one of the following organs:
• This traffic light front or rear, may especially be chosen from a daytime running light (a light that comes on automatically when the vehicle starts moving, also known by the acronym "DRL”), a position light, a reversing light, a fog light, a blinker, a brake light or any other traffic light.
• a daytime running light a light that comes on automatically when the vehicle starts moving, also known by the acronym "DRL”
• a position light a reversing light
• fog light a fog light
• a blinker a brake light or any other traffic light.
• the single figure is a sectional view in perspective of a vehicle headlight equipped with a lighting system according to the invention.
• substantially parallel means a direction forming an angle of at most ⁇ 20 ° or at most ⁇ 10 ° with a particular direction.
• the single figure shows a headlamp 1 for signaling the vehicle, comprising a housing 3, a face 5 is translucent or transparent for the output of the light beams in a lighting direction L.
• This face 5 can adopt any flat shape or more complex as in the example shown.
• This projector 1 is equipped with a lighting system 7 which comprises a rigid printed circuit board 9 equipped with light-emitting diodes (not shown).
• This rigid plate 9 is disposed inside the housing 3, fixed thereto by any appropriate means.
• the rigid plate 9 is arranged parallel to the predetermined lighting direction of the lighting system and the lighting system 7 comprises an optical module 1 1 shaped to propagate and guide the light beams emitted by the light-emitting diodes. so that each light beam emerging from said optical module is substantially parallel to the illumination direction.
• the lighting direction of the lighting system 7 coincides with the lighting direction L of the projector 1.
• the optical module 1 1 is shaped so as to follow each light beam a path formed of a first portion 1 1A perpendicular to the rigid plate and a second portion 1 1B parallel to the rigid plate, the free end 1 1C of the first part being positioned facing diodes of the rigid plate 9, each light beam leaving the optical module 1 1 by the free end 1 1D of the second part.
• the free end 1 1 C of the first part is for example a receiving surface of the light beams emitted by the LEDs, for example a flat surface substantially perpendicular to the light beams.
• the free end 1 1D of the second part is for example an emission surface of the light beams, for example a flat surface.
• the optical module 1 1 is formed of several elements 13A, 13B, 13C, 13D made of a polymeric material capable of propagating and guiding a light beam flowing inside its volume.
• the rigid plate 9 of the example comprising light-emitting diodes on its two faces, two of these elements 13A, 13B are located above the plate 9, the other two elements 13C, 13D being located below the plate 9 These elements may be symmetrical with respect to the plate 9, or not.
• the light-emitting diodes are arranged in parallel rows on the rigid plate 9, on each face thereof.
• Each first part 1 1A of an element 13A, 13B, 13C, 13D thus has a plate shape perpendicular to the rigid plate 9, each second part 1 1B also having a plate shape parallel to the lighting direction L.
• Elements 13A, 13B, 13C, 13D are further dimensioned to not be in contact with each other.
• masks 15 are furthermore arranged so as to fill the space separating the second parts 11B from the elements 13A, 13B, 13C, 13D. A light beam thus emerges only through the end of the optical module 1 1.
• Each element 13A, 13B, 13C, 13D comprises a surface 1 1E shaped to reflect a light beam between its first portion 1 1A and its second portion 1 1B.
• this surface 1 1E is inclined at an angle of 45 ° with respect to the direction of the incident light beam, this direction being perpendicular to the rigid plate 9 in the example.
• the surface 1 1E may be covered with a reflective metal layer.
• the optical module 1 1 thus arranged allows the propagation and guiding of the light beams emitted by the light-emitting diodes according to the path symbolized by the arrows shown inside the optical module 1 1 of the example shown.
• the lighting member described with reference to Figure 1 is a motor vehicle headlight.
• the invention is however in no way limited by the type and shape of the lighting member, which may also be an interior or exterior lighting member, for a vehicle or a building.
• the lighting system according to the invention has the advantage of being able to be used in many organs which we seek in particular to reduce the size and weight.

Applications Claiming Priority (2)

Publications (1)

Family

ID=49322613

Family Applications (1)

Country Status (7)

Families Citing this family (9)

Citations (2)

Family Cites Families (23)

• 2013
  • 2013-07-22 FR FR1357173A patent/FR3008774B1/fr active Active
• 2014
  • 2014-07-18 US US14/906,185 patent/US20160195230A1/en not_active Abandoned
  • 2014-07-18 WO PCT/FR2014/051848 patent/WO2015011377A1/fr active Application Filing
  • 2014-07-18 CN CN201480046539.9A patent/CN105531151B/zh active Active
  • 2014-07-18 KR KR1020167004567A patent/KR102109181B1/ko active IP Right Grant
  • 2014-07-18 EP EP14749924.8A patent/EP3024696A1/de not_active Withdrawn
  • 2014-07-18 JP JP2016528578A patent/JP2016527685A/ja active Pending

Patent Citations (2)

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events