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]
  • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating 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
  • F21S43/236—Light guides characterised by the shape of the light guide
  • F21S43/241—Light guides characterised by the shape of the light guide of complex shape
• • 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

Definitions

• the invention relates to a lighting system, in particular for a lighting member of a motor vehicle with a printed circuit board inclined with respect to 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 on one of its faces, characterized in that the plate rigid is inclined at an angle ⁇ of 50 ° to 70 ° with respect to a predetermined illumination direction of the illumination system and in that the illumination system comprises, associated with each light-emitting diode, a shaped elementary optical module to propagate and guide the light beam emitted by the associated light-emitting diode so that said light beam emerging from said elementary optical module is parallel or substantially parallel to the illumination direction.
• each elementary optical module is shaped to capture the light beam emitted by the associated diode and straighten it in a direction substantially parallel to the illumination direction.
• These elementary optical modules are in particular distinct from each other, without contact with each other in a direction transverse to the direction of illumination.
• 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.
• a light beam is parallel (or substantially parallel) to a lighting direction, when the axis of symmetry of the cone delimiting 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 rigid plate may be inclined at an angle of 55 ° to 65 °, for example 60 °, with respect to said illumination direction.
• the rigid plate can be positioned vertically, the lighting direction being horizontal.
• the lighting system may comprise a single printed circuit board.
• Each elementary optical module is shaped to capture and rectify a light beam emitted by a light emitting diode. This can be achieved by choosing a shape and / or material suitable for the realization of this elementary optical module.
• a part of the elementary optical module may have a rectifying function, for example obtained by a suitable orientation of its walls allowing a reflection of an incident ray in a direction parallel or substantially parallel to the direction of illumination. or towards another reflective wall for further reorientation in a direction closer to the illumination direction.
• Such walls can be determined by the laws of optics as a function of the characteristics of the light beam emitted by a diode and the inclination of the rigid plate.
• each elementary optical module may comprise a light beam input positioned facing the associated light emitting diode and a light beam output and each elementary optical module may comprise on the input side a beam rectifying portion. shaped light for rectifying said light beam in a direction substantially parallel to the illumination direction.
• the input of an elementary optical module may have a reception surface, for example a flat surface substantially perpendicular to the light beam emitted by the associated LED.
• the positioning of the elementary optical module relative to the associated light emitting diode may be chosen to allow the optical module to capture most of the light radiation emitted by the diode.
• the elementary optical module can be positioned to capture 70 to 100% of the emitted light radiation, preferably 80 to 100% of the radiation, or even 90 to 100% of the radiation.
• the elementary optical module can thus be located at a distance of the order of 0.5 to 5 cm from the associated light emitting diode.
• the lighting system according to the invention further comprises at least one module optical collection connected to a plurality of elementary optical modules, said optical collection module being shaped to propagate and guide the light beams from the elementary optical modules.
• This can make it possible to improve the homogeneity of the luminous flux coming out of the lighting system.
• This arrangement also makes it possible to shape the luminous flux coming out of the lighting system, which has the same shape as the output of the collection module.
• the light beams from the elementary optical modules are thus guided from an input to an output of a collection optical module. This input receives the light beams coming out of several elementary optical modules, which then exit through the output of the optical collection module, generally formed by a free end of the latter.
• each elementary optical module may be identical and the outputs of a plurality of elementary optical modules may be connected to an input of a collection optical module.
• the input of the optical collection module for example a flat surface, is parallel or substantially parallel to the rigid plate supporting the light-emitting diodes. This arrangement can also make it possible to improve the homogeneity of the luminous flux coming out of the lighting system.
• the light-emitting diodes can be arranged in rows on the rigid plate.
• the optical collection module can then be connected to the elementary optical modules associated with the light emitting diodes of a row, which may allow a simpler embodiment of the optical collection module.
• two optical collection modules can be made in one piece, thereby increasing the emission surface of the light output from the lighting system.
• the invention is however not limited by the shape and arrangement of a collection optical module, nor by the arrangement of the light-emitting diodes on the rigid plate.
• each optical module of The collection can be made in one piece with the basic optical modules to which it is connected.
• each elementary optical module may be formed of a polymeric or glass material, preferably translucent or transparent, capable of propagating and guiding at least one light beam flowing at a distance of its interior, in particular a light beam emitted by light-emitting diodes.
• the material used may be any material adapted to guide a light radiation, such as a glass or polymer material, colored or not, for example polycarbonate or poly (methylmethacrylate) (PMMA).
• PMMA poly (methylmethacrylate)
• Each optical module can thus be produced in a simple manner and its shape can be adapted to the member intended to receive the lighting system.
• the shaping of the elementary optical modules can be obtained by a method of electroerosion of the material constituting the module.
• one or more masks may be arranged so as to partially or completely fill a possible space separating the elementary optical modules and / or the optical collection modules, in particular separating the optical collection modules from the side of the lighting system through which the light beams emerge, thus making it possible to define more clearly the shape of the luminous flux coming out of the lighting system.
• These masks also make it possible to conceal technical parts located behind these masks and whose vision from outside the lighting system is undesirable.
• optical collection modules When several optical collection modules are provided, they are preferably shaped so as not to come into contact with each other. This makes it possible to improve the guiding of the light beams.
• 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, can be chosen especially 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.
• FIG. 1 is a sectional and perspective view of a vehicle headlight equipped with a lighting system according to the invention
• FIG. 2 is a partial schematic representation of a lighting system according to the invention, in section along the illumination direction, along a row of light-emitting diodes showing elementary optical modules connected to an optical module of FIG. collection;
• FIG. 3 is an enlargement of an elementary optical module of FIG.
• substantially parallel means a direction forming an angle of at most ⁇ 20 ° or at most ⁇ 10 ° with a particular direction.
• FIG. 1 represents a headlamp 1 for the signaling of the vehicle, comprising a housing 3, one side 5 of which is translucent or transparent, for the output of the light beams according to a lighting direction L.
• This face 5 can adopt any flat shape or more complex as in the example shown.
• This headlamp 1 is equipped with a lighting system 7 which comprises a rigid printed circuit board 9 equipped with light-emitting diodes 12 on one of its faces. These light-emitting diodes are arranged in rows in the example shown.
• This rigid plate 9 is disposed inside the housing 3, fixed thereto by any appropriate means.
• the rigid plate 9 is inclined at an angle ⁇ of 50 ° to 70 ° with respect to a predetermined illumination direction of the lighting system.
• the lighting direction of the lighting system 7 coincides with the lighting direction L of the projector 1.
• the angle ⁇ is 60 °, ie the angle ⁇ between a plane normal to the lighting direction and the inclined plate is 30 °.
• the lighting direction L is substantially horizontal, parallel to the longitudinal direction of the vehicle equipped with the projector 1 and the rigid plate 9 is vertical.
• the inclination of the rigid plate 9 can thus be obtained following vertical axis rotation from a position normal to the lighting direction L.
• the invention is not limited by an inclination as shown, another inclination of the rigid plate 9, resulting for example from a rotation about a longitudinal or transverse axis of the vehicle (always from a position normal to the lighting direction), also reducing the size of the lighting system according to the invention.
• the lighting system 7 further comprises, associated with each light-emitting diode 12, an elementary optical module 1 1 shaped to propagate and guide the light beam emitted by the associated light-emitting diode 12 so that said outgoing light beam said elementary optical module 1 1 is substantially parallel to the illumination direction.
• FIG. 3 schematically shows the light rays emitted by the light-emitting diode 12 and their path inside the volume of the elementary optical module 1 1.
• the rigid plate 9 is thus equipped with a plurality of elementary optical modules 1 1, as partially visible in FIG. 2, which represents the rigid plate 9 in section along a row 10 of light-emitting diodes 12.
• an elementary optical module 1 1 comprises a light beam input 1 1A positioned opposite the associated light-emitting diode 12 and a light beam output 11B.
• the light beam input 1 1A is for example a flat surface substantially perpendicular to the light beam emitted by the LED 12.
• the elementary optical module 1 1 further comprises, on the side of its input 1 1 A, a portion 1 1C of rectification of the light beam shaped to straighten said light beam in a direction substantially parallel to the illumination direction L.
• This part 1 1C of rectification comprises in the example shown a wall 1 1D inclined so as to reflect the incident rays in the direction of the output 1 1B of the elementary module, substantially parallel to the lighting direction L.
• This inclination of the wall 1 1D can to be determined according to the laws of optics as a function of the nature of the light-emitting diode 12 and the position of the elementary optical module.
• the lighting system 7 further comprises a plurality of optical collection modules 13 each connected to a plurality of elementary optical modules 1 1.
• Each optical collection module 13 is shaped to propagate and guide the light beams coming from the optical modules. 1.
• the outputs 1 1B of a plurality of elementary optical modules 1 1 are thus connected to an input 13A of a collection optical module 13.
• each elementary optical module 1 1 is preferably identical.
• the input 13A of the optical collection module 13 has a general shape substantially parallel to the rigid plate 9, as can be seen in FIG. 2.
• the optical collection module 13 is partially represented.
• the optical collection modules 13 are represented more completely in FIG. 1.
• This output 13B forms an emission surface of the light beams in the example, substantially flat emission surface.
• optical collection modules 13 are shown, each connected to a row 10 of light-emitting diodes 12.
• these optical collection modules 13 are connected two by two via a portion 13C.
• two optical collection modules 13 connected via a portion 13 are made in one piece.
• each optical collection module 13 is made in one piece with the elementary optical modules 1 1 to which it is connected, as is the case in the example shown.
• the elementary optical modules 1 1 as well as the optical collection modules 13 are made of a polymer material capable of propagating and guiding a light beam circulating inside the volume of the optical modules.
• FIG. 1 are visible masks 15, arranged so as to fill the space between the outputs 13B of the optical collection modules 13. The collected light beams thus come out only through the free ends of the optical collection modules 13.
• 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.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Optics & Photonics (AREA)
• Mechanical Engineering (AREA)
• Non-Portable Lighting Devices Or Systems Thereof (AREA)
• Fastening Of Light Sources Or Lamp Holders (AREA)
• Planar Illumination Modules (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=49378465

Family Applications (1)

Country Status (7)

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• 2013
  • 2013-07-22 FR FR1357172A patent/FR3008778B1/fr not_active Expired - Fee Related
• 2014
  • 2014-07-18 KR KR1020167004586A patent/KR20160035014A/ko not_active Application Discontinuation
  • 2014-07-18 US US14/906,157 patent/US20160186950A1/en not_active Abandoned
  • 2014-07-18 WO PCT/FR2014/051849 patent/WO2015011378A1/fr active Application Filing
  • 2014-07-18 EP EP14749925.5A patent/EP3024697A1/de not_active Withdrawn
  • 2014-07-18 JP JP2016528579A patent/JP2016527686A/ja active Pending
  • 2014-07-18 CN CN201480046497.9A patent/CN105492254A/zh active Pending

Non-Patent Citations (1)

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