EP3124855B1 - Dispositif d'éclairage pour projecteur de véhicule automobile - Google Patents

Dispositif d'éclairage pour projecteur de véhicule automobile Download PDF

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Publication number
EP3124855B1
EP3124855B1 EP16181308.4A EP16181308A EP3124855B1 EP 3124855 B1 EP3124855 B1 EP 3124855B1 EP 16181308 A EP16181308 A EP 16181308A EP 3124855 B1 EP3124855 B1 EP 3124855B1
Authority
EP
European Patent Office
Prior art keywords
face
lighting device
light source
guide
light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16181308.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3124855A1 (fr
Inventor
Yves Gromfeld
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Vision SAS
Original Assignee
Valeo Vision SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP3124855A1 publication Critical patent/EP3124855A1/fr
Application granted granted Critical
Publication of EP3124855B1 publication Critical patent/EP3124855B1/fr
Active legal-status Critical Current
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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
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • 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
    • 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]
    • 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
    • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
    • 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
    • F21S41/25—Projection lenses
    • F21S41/26—Elongated lenses
    • 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
    • F21S41/25—Projection lenses
    • F21S41/265—Composite lenses; Lenses with a patch-like 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
    • 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
    • F21S41/25—Projection lenses
    • F21S41/27—Thick lenses
    • 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
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • 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
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/06—Optical design with parabolic curvature
    • 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
    • F21S45/40—Cooling of lighting devices
    • F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
    • F21S45/48—Passive cooling, e.g. using fins, thermal conductive elements or openings with means for conducting heat from the inside to the outside of the lighting devices, e.g. with fins on the outer surface of the lighting device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • 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
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to a lighting device.
  • a preferred application relates to the automotive industry for the production of signaling and / or lighting devices, in particular vehicle headlights.
  • this beam has a cut in the upper part with a horizontal portion, preferably about 0.57 degrees below the horizon, so as not to illuminate the area in which should be the driver of a vehicle coming in the opposite direction .
  • Lighting devices for such lamps comprising at least one light source and at least one guide for directing the light rays between the source and an exit face.
  • the document EP2045515 discloses such a lighting device with a reduced compactness due to the fact that the light source is oriented perpendicular to the optical axis of the device, and a 90 ° ray return is operated within the guide.
  • the exit faces of the lighting devices are visible from the front of a vehicle, through the lens of the optical block.
  • the exit face is part of a cylindrical-shaped tip when viewed from the outside.
  • several cylindrical-shaped tips are arranged next to each other and offset in depth to be more or less close to the ice.
  • the object of the invention is thus to provide a compact lighting system whose output surface is curved, and preferably follows the profile of the ice placed downstream.
  • the global direction is defined by the average direction of the light beam composed of all the rays emitted by the light source.
  • this overall direction may be substantially perpendicular to the optical axis.
  • the overall direction may make an angle with the optical axis O of between 15 ° and 75 °, in particular between 40 ° and 50 °, or even substantially equal to 45 °.
  • the lighting device is mainly characterized in that it comprises a single output portion of said light beam whose output surface is continuous in curvature, and which is common to all the modules, and in that comprises a plurality of modules, the guides having side walls for preventing rays from a light source associated with a guide from passing into the adjacent guide.
  • the exit surface is smooth.
  • the lighting device according to the invention thus creates one or more beams projected to infinity, with a cutoff profile, while having a single curved and aesthetic output surface, visible through the lens of a projector.
  • This device therefore has the advantage of implementing a single output surface intended to be used with one or more light sources to perform specific lighting functions, or even signaling. Indeed, it can produce a great variability of light beams depending on the number and location of the associated light sources, to meet different needs and requirements in terms of lighting.
  • this device has a compact geometry since the rays undergo a 90 ° return inside the guide, which allows the source to project rays by perpendicular to the optical axis and to have a proximal positioning of the exit surface, compared to a conventional device where the source projects rays in a direction parallel to the optical axis and to a distal positioning of the surface of the exit.
  • the device of the invention therefore has the advantage of being compact.
  • input face associated with the light source is understood to mean that the source can be directly applied against or in the immediate vicinity of the input face.
  • this expression also includes configurations where the source is not in direct contact with the input face, in particular the configuration where it is intended to interpose at least one optical component of the collector, collimator or single conductor type. light between the source and the wafer, for example to improve / increase the amount of light penetrating into the guide by the entrance face by further limiting the light leakage, and / or to reserve the possibility of deporting the source .
  • the light guide is made of a material capable of allowing the reflection of said light beam on the return face by total internal reflection.
  • the return face may be coated with a reflective coating.
  • the invention also relates to a motor vehicle light projector comprising at least one lighting device as described above.
  • the rays issuing from the common exit surface reach said ice without encountering any obstacle.
  • the rays emitted at the output of the lighting device form a portion or the entirety of a regulatory beam of road lighting type or crossing light type.
  • Such a projector equips a motor vehicle for the illumination of the road.
  • vertical and horizontal are used in the present description to designate directions, including beam-cutting directions, in an orientation perpendicular to the horizon plane for the term “vertical”, and in a parallel orientation. in terms of the horizon for the term “horizontal”. They are to be considered in the operating conditions of the device in a vehicle. The use of these words does not mean that slight variations around the vertical and horizontal directions are excluded from the invention. For example, an inclination relative to these directions of the order of + or - 10 ° is here considered as a minor variation around the two preferred directions.
  • front and rear are to be understood by considering the direction of propagation of the light coming out of the lighting device towards the front.
  • parallel or the concept of axes includes here in particular with manufacturing or mounting tolerances, substantially parallel directions or substantially coinciding axes within this framework.
  • the cutoff profile preferably refers to the formation of a non-uniformly distributed output beam around the optical axis because of the presence of a zone of least light exposure, this zone being substantially delimited by a profile of cut that can be formed by at least two, and in particular three line segments forming an angle between them or have a more complex shape in turns such as oblique cuts.
  • the lighting device is represented in a single-module configuration, that is to say having only one light source 8.
  • This module has an optical axis O, which specifies the final orientation of the rays. outgoing module.
  • the light source 8 is represented at Figures 5 and 6 , and is configured to emit light rays.
  • the light source 8 comprises a light-emitting diode (LED) 8.
  • the LED 8 is positioned vis-à-vis an entry face 1 of a light guide, so that the light rays emitted enter said guide by this input face 1.
  • the orientation guide is configured to direct the rays toward an exit face 3, orienting them substantially parallel to a horizontal plane.
  • the exit face 3 extends transversely with respect to the entry face 1.
  • the input face 1 is flat in the present example, but could be curved in another example, being defined conventionally by a scanning radius and a profile radius.
  • the exit face 3 is rounded and has a visual aesthetic curve from outside the module. This exit face 3 plays the role of a collimation lens.
  • the return face 2 has a curved shape associated with the profile of the exit face 3 so that the light rays issuing from the guide have a direction substantially parallel to a horizontal plane.
  • This curved shape corresponds more particularly to a parabolic form.
  • the focus F of this parabola is located under the entrance face 1.
  • a point of the LED 8 is placed in the focus F of the parabola, as illustrated in Figures 5 and 6 .
  • center C of the LED 8 is located at the focus F of the dish, while in the case of the figure 5 an edge 9 of the LED 8 is located at the focus F of the dish.
  • the LED 8 emits a light beam towards the input face 1.
  • This beam is vertical, the LED 8 being configured to shoot along the Z axis and in the + Z direction.
  • the rays of this beam are then refracted by the input face 1, and propagate vertically towards the deflection face 2.
  • the latter ensures a total reflection of the incident rays, and redirect them inside the guide, to the exit face 3 in a substantially horizontal direction.
  • the rays incident on the return face 2 are perpendicular to the rays reflected by the deflection face 2. The latter thus makes a reference to 90 ° rays.
  • the exit face 3 provides a collimation, that is to say a generation of a beam of parallel rays, in the direction of the optical axis O of the module, in the horizontal plane.
  • the figure 6 shows the optical principle of the basic concept: all of the rays emitted by the LED 8 enter the guide to be guided along a path comprising a right angle, then to be collimated in the direction of the optical axis O.
  • the module has the advantage of having a small footprint in its dimension b in the direction X.
  • the return face 2 is optically linked to the outlet face 3 and to the desired distribution of the output rays.
  • the exit face 3 has a function that is more aesthetic than optical, and only serves to collimate the beam, the return face 2 has a large role to play in the optical principle of the module, and must orient properly. the rays within the guide, so as to compensate for the lack of optical influence of the exit face 3 by its curved shape.
  • the module as described could be flipped horizontally, so that the LED 8 is configured to shoot along the Z axis and in the -Z direction. In this case, the spokes will be oriented towards the bottom of the module, vertically, and no longer towards the top of the module.
  • the operation of the module remains identical, however, with the same optical principle.
  • the light beams obtained with the lighting device according to the invention comprises a cutoff zone, that is to say a boundary between a light area and a dark area to avoid dazzling drivers or people coming in the opposite direction the vehicle in question.
  • a cut is essential in light beams intended to ensure functions such as: dipped beam, fog lights, additional highway fire, additional light bend, etc.
  • a break can be achieved by arranging the light source 8 so that the focus F of the dish constituting the return face 2 is located on the rear edge 9 of the source 8 instead of being located in the center C of this source 8.
  • the LED 8 is therefore concretely offset by a distance d equal to half of its width in the direction X.
  • a light ray i1 coming from the rear edge 9 of the light source 8 and hence from the focal point F is simply refracted by the input face 1, then reflected perpendicularly along a ray r1 towards the exit face 3.
  • the radius r1 is substantially horizontal. It will remain in a horizontal plane at the exit of the device.
  • All the other light rays emitted by the source 8 will come from points situated in front of the rear edge 9 of the source 8, like the radius i2. This radius i2 is refracted and then reflected along a descending radius r2.
  • Another radius i3 from the rear edge 9 will be reflected along a horizontal radius r3 while another radius i4 from a point at the leading edge 10 will be reflected at a downwardly directed radius r4.
  • the resulting beam will therefore have a horizontal cutoff line with a lighted area below this cutoff line and a darkened area above it.
  • the horizontal cut can be achieved by logically disposing the LED in such a way that the focus of the parabola constituting the return face is located on the front edge of the source instead of being on the back edge.
  • the LED 8 can be rotatable around the Y axis at an angle of between +/- 45 ° and / or around the Z axis with an angle between +/- -15 °. These freedom of movement of the LED 8 allow in particular to generate a light beam with a cut partly oblique to the left or to the right, so as to illuminate the traffic signs and the sidewalks or aisles on the left side of the road (traffic on the left) or on the right side of the road (traffic on the right).
  • the Figures 7 and 8 show an embodiment where the lighting device according to the invention is composed of four modules 11,12,13,14.
  • modules 11,12,13,14 are aligned next to each other, and have a single continuous output surface 3, and therefore common to the modules 11,12,13,14.
  • This common output surface 3 thus integrates the four output faces 3 of the four modules 11, 12, 13, 14.
  • This outlet surface 3 has a curved shape, aesthetic. It will be visible from the outside through a mirror 15 of a projector. Preferably, this exit surface 3 follows the curvature of the lens 15 of the projector.
  • each of the modules 11, 12, 13, 14 fulfills a very precise lighting function.
  • the modules 11, 12, 13, 14 are not identical to each other. They have variations in the shapes of the faces, as well as in the dimensions, especially in the X direction.
  • the end modules 11, 14 have a dimension in the X direction much greater than that of the central modules 12,13. Therefore, the position of the light sources 8 will also be different depending on the modules 11,12,13,14 with which they are associated. In other words, the distance between the light source 8 and the common output surface 3 of the device varies according to the lighting functions of the modules 11, 12, 13, 14.
  • This type of four-module lighting device 11, 12, 13, 14 makes it possible, for example, to generate an oblique cut-off light towards the right, as illustrated by the network of isolux curves in figure 9 .
  • the isolux curves are obtained on a screen placed at 25 meters from the lighting device, perpendicular to the general optical axis of the device whose intersection with the screen corresponds to the 0 ° graduation along the abscissa axis.
  • the vertical axis passing through 0 ° corresponds to the intersection of the screen and the vertical plane passing through the general optical axis.
  • the dimension e 'of the common exit surface 3 in the Z direction is of the order of 20 mm.
  • the vertical parallel side faces 4 of the modules 11, 12, 13, 14 constitute intermediate walls between the modules 11, 12, 13, 14.
  • Two adjacent modules may have, at their surface in common, two side walls 4 contiguous each corresponding to a module, or a single side wall 4 common to both modules.
  • These side walls 4 may be aluminized, since they are intended to prevent the beams produced by a light source 8 placed at a guide of a module, to pass through the guide of the adjacent module.
  • FIG. 10 Another example of nesting of four modules 11,12,13,14 forming a lighting device is presented in figure 10 , in particular with a representation of the side walls 4.
  • the latter have sometimes complex shapes, with recesses, so as to fit into each other.
  • the lighting device being housed inside the space delimited by the housing 18 and the closing window 15, the lighting device being arranged in such a way that the rays issuing from the said common exit surface 3 reach said closure glass.
  • the LEDs 8 of the lighting device are positioned on a substrate 17 which includes precise locations for this purpose.
  • a heat sink 16 is conventionally connected to this substrate 17.
  • the light device according to the invention has been described in the context of an oblique cut beam, this device can also be adapted to other types of cut-off beams, requiring the same optics and different positions of light sources. to generate respective light beams compatible with different types of regulations.
  • the light device according to the invention may be a lighting and / or signaling device.

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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)
EP16181308.4A 2015-07-28 2016-07-26 Dispositif d'éclairage pour projecteur de véhicule automobile Active EP3124855B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1557183A FR3039629B1 (fr) 2015-07-28 2015-07-28 Dispositif d'eclairage pour projecteur de vehicule automobile

Publications (2)

Publication Number Publication Date
EP3124855A1 EP3124855A1 (fr) 2017-02-01
EP3124855B1 true EP3124855B1 (fr) 2018-08-15

Family

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EP16181308.4A Active EP3124855B1 (fr) 2015-07-28 2016-07-26 Dispositif d'éclairage pour projecteur de véhicule automobile

Country Status (5)

Country Link
US (1) US10920947B2 (zh)
EP (1) EP3124855B1 (zh)
KR (1) KR102664536B1 (zh)
CN (1) CN106402768B (zh)
FR (1) FR3039629B1 (zh)

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FR3073925B1 (fr) * 2017-11-20 2020-11-13 Valeo Vision Element optique pour module optique de vehicule automobile
KR102435180B1 (ko) * 2017-11-29 2022-08-23 에스엘 주식회사 차량용 램프
US10253940B1 (en) * 2018-03-14 2019-04-09 T.Y.C. Brother Industrial Co., Ltd. Vehicle light assembly
FR3079598B1 (fr) * 2018-03-30 2021-04-30 Valeo Vision Module d'eclairage avec element optique multisource avec face de sortie lisse
WO2020064259A1 (en) * 2018-09-28 2020-04-02 Lumileds Holding B.V. Multi-focal collimating lens and bi-function headlight assembly
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CN113686774A (zh) * 2021-10-26 2021-11-23 三一重型装备有限公司 腐蚀测试装置和井下作业设备

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Also Published As

Publication number Publication date
CN106402768B (zh) 2021-08-06
KR102664536B1 (ko) 2024-05-09
EP3124855A1 (fr) 2017-02-01
US10920947B2 (en) 2021-02-16
KR20170013845A (ko) 2017-02-07
FR3039629A1 (fr) 2017-02-03
FR3039629B1 (fr) 2020-08-14
CN106402768A (zh) 2017-02-15
US20170030542A1 (en) 2017-02-02

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