EP2833053B1 - Dispositif d'éclairage et/ou de signalisation et bloc optique pour véhicule à moteur comprenant ledit dispositif - Google Patents

Dispositif d'éclairage et/ou de signalisation et bloc optique pour véhicule à moteur comprenant ledit dispositif Download PDF

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Publication number
EP2833053B1
EP2833053B1 EP14178491.8A EP14178491A EP2833053B1 EP 2833053 B1 EP2833053 B1 EP 2833053B1 EP 14178491 A EP14178491 A EP 14178491A EP 2833053 B1 EP2833053 B1 EP 2833053B1
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EP
European Patent Office
Prior art keywords
light
guide
sources
source
colour
Prior art date
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Application number
EP14178491.8A
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German (de)
English (en)
French (fr)
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EP2833053A1 (fr
Inventor
Vincent Godbillon
Jean-Claude Puente
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
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Valeo Vision SAS
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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
    • 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
    • F21S43/245—Light guides characterised by the emission area emitting light from one or more of its major surfaces
    • 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
    • F21S41/20—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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/285—Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805
    • 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
    • F21S43/10—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
    • F21S43/15—Strips of light sources
    • 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
    • F21S43/237—Light guides characterised by the shape of the light guide rod-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
    • F21S43/255—Filters

Definitions

  • the present invention relates to a lighting device and / or signaling and / or interior lighting, especially for a motor vehicle, and an optical unit comprising said device. It is particularly intended for position lights and / or daytime running lights, flashing lights or brake lights.
  • Recent technologies have been developed, with devices provided with a light source, usually a light-emitting diode, and a light guide through which a light beam from the source is propagated.
  • the light propagates in the guide by total reflection to an exit face, which projects the light so as to be seen by the vehicles that follow or precede.
  • EP 1 359 369 A2 and EP 1 835 224 A1 describe lighting and / or signaling devices for a motor vehicle using light guides.
  • the light guides have the property of transmitting the white light by decomposing it as it is propagated, so that the light transmitted by these light guides has a different coloration along their longitudinal axis, a function of the distance from the light source.
  • This decomposition of the white light by the light guides is due to the material in which they are made.
  • Light guides are indeed commonly made of thermoplastic material, preferably polymethyl methacrylate (PMMA) or polycarbonate (PC); these two materials absorb more the blue component than the yellow and red components of the white light and give it a yellowish hue during its transmission.
  • the car manufacturer who wishes to juxtapose a light guide and a second light guide, within the same optical unit, must ensure that the color of the lights emitted by each of these two means is homogeneous. Otherwise, this leads to an unsightly appearance for users, particularly when these two means simultaneously emit light whose hue is different when it should be the same.
  • the object of the invention is therefore to homogenise the hues of light emitted by various means within the same optical block, in particular when these means simultaneously emit light whose hue must be perceived by the user as being the even.
  • the invention also relates to an optical unit for a motor vehicle, comprising at least one device as described above.
  • the figure 1 is a schematic representation of the state of the art.
  • a first light source 10 associated with means 12 for transmitting the light generated by said first source.
  • Said transmission means 12 are arranged in the vicinity of a series of second light sources 20.
  • Said light-emitting means and said second light sources are configured to generate light simultaneously and / or in the same direction.
  • the light emitting means 12 have the property of transmitting the white light by decomposing it as it propagates along its longitudinal axis.
  • the first source of the light 10 which is transmitted by this first light guide 12 is here a point light source; preferably, it is a light-emitting diode 10.
  • the decomposition of the white light emitted by this diode 10 is in said transmission means 12 in the direction marked X.
  • Said transmission means 12 here comprise a light guide, in the form of a cord or a cylindrical element of circular section or not.
  • the emission of light along the length of the guide 12 from the light flowing in the guide 12 is effected, for example, at an outlet face of said guide, opposite to a reflection face of said guide, said reflection face being provided with optical patterns to deflect the light at an incident angle allowing it to exit the guide through the exit face.
  • Said transmission means 12, in particular said guide consist for example of a transparent material, especially plastic.
  • This transparent plastics material is preferably polymethyl methacrylate (PMMA) or polycarbonate (PC).
  • This guide 12 breaks down the light it transmits. In particular, it gradually absorbs the blue component of this light, so that the light that it transmits turns yellow as it moves away from the diode 10, in the X direction.
  • Said second light sources 20 are point sources 20 disposed in the vicinity of an area of said guide 12.
  • point source means sources emitting a light beam, for example, in the form of a cone.
  • These light sources include, for example, light-emitting diodes positioned in the center of reflectors 30. The color of the light emitted by this series of point sources is not impaired. Indeed, in the example considered, the reflectors 30 do not degrade the coloring of the light emitted by the diodes.
  • this series of point sources 20 emit white light, there appears a zone Y whose appearance is open to criticism because two shades of light will be emitted: one by the guide 12 whose color turns yellow as as it moves away from the diode 10, in the X direction, and the other by the series of second sources 20 whose emitted light is white in color.
  • the invention consists in proposing means capable of correcting the hue of the light emitted by the series of second sources 20, in order to match that emitted by the guide 12.
  • the series of diodes 21, 22, 23, 24, 25 shown are each positioned in the center of a reflector, respectively, 31, 32, 33, 34, 35.
  • the solution proposed by this first embodiment consists of selecting diodes 21, 22, 23, 24, 25 and / or reflectors 31, 32, 33, 34, 35 forming light sources of different colors.
  • the color of each of the diode / reflector pairs is scalable in the direction of the X direction. This means that a type of diode 21 and / or a type of reflector 31, which will be different from the type of diode, will be chosen. the diode 22 and / or reflector 32, neighbors, and so on.
  • the purpose is to select diode types 21, 22, 23, 24, 25 and / or types of reflectors 31, 32, 33, 34, 35 which allow light emission with coloring according to the color of the emitted color. by the guide 12, in particular the yellowing of the white light emitted by the source 10, in the direction X.
  • This solution can be adapted to an unlimited number of diode / reflector pairs located in the vicinity of the guide 12.
  • said guide 12 may be rectilinear, as shown in FIG. figure 2 . He may also present a path with curves, elbows or other breaks.
  • the plurality of diode / reflector pairs will always be placed on a following axis in parallel with said guide, here on a collinear axis X 'to the longitudinal axis of the guide 12.
  • the diode / reflector pairs are represented as regularly spaced apart from each other; however it is conceivable that their deviation is not regular along the axis X ', whether it is straight, or not.
  • the diodes 21, 22, 23, 24, 25 emit the same white light
  • the reflectors 31, 32, 33, 34, 35 at the center of which they are placed are configured to provide the reflection of said white light.
  • the solution proposed in this second embodiment consists in providing several filters 43, 44, 45. These filters are positioned downstream of each diode / reflector pair whose hue must be given to that of the guide 12.
  • Said filters 43, 44, 45 are colored and transform the color of the light passing through them. These are common filters such as tinted blades.
  • each of these light filters changes in the direction of the X direction.
  • a light filter 43 will be chosen whose color will be different from the color of the filter 44. and so on, the purpose being to choose filter colors 43, 44, 45 which follow the color tint emitted by the guide 12, in particular the yellowing of the white light emitted by the source 10, in the X direction .
  • This second embodiment is also adapted for a limited number of diode / reflector pairs, located in the vicinity of the guide 12.
  • Said guide 12 may be straight or may have a path with curves, bends or other breaks.
  • the figure 4 represents a third embodiment which is close to the previous one.
  • the light filters 43, 44, 45 are replaced by a filter 50 which is in the form of a single continuous filter 50, or band, and the hue of which changes along the axis X ', in the direction X.
  • This continuous filter may be flat or semicircular profile in a plane perpendicular to the axis X '.
  • This third embodiment is also adapted to an unlimited number of diode and reflector pairs located in the vicinity of the guide 12.
  • Said guide 12 may be rectilinear or may have a path with curves, bends or other breaks.
  • the light filter 50 will then have the shape of a non-rectilinear strip.
  • the figure 5 represents a fourth embodiment.
  • the series of diodes 21, 22, 23, 24, 25 shown are each positioned at the center of a reflector, respectively, 31, 32, 33, 34, 35.
  • a light filter 53, 54, 55 is positioned locally, at the level of the diode 23, 24, 25, in order to color the light emitted by said diode 23, 24, 25 even before this light is reflected by its reflector 33, 34, 35.
  • the filters 61, 62 are arranged, in the optical path of the light, between said diodes 20 and the reflectors 30; while on the figures 3 and 4 the filters 43, 44, 45, 50 are arranged downstream of the diode / reflector pairs, that is to say that said filters 43, 44, 45, 50 are arranged on the optical path of the light, after said diode / reflector couples.
  • the filter colors 53, 54, 55 follow the hue of the color emitted by the guide 12.
  • This solution can also be adapted to an unlimited number of diodes placed in the center of a reflector 33, 34, 35.
  • FIGS. 6a and 6b illustrate, for their part, two possibilities for implementing the variant of the figure 5 . Indeed, it is conceivable to use diodes 20 not visible from outside the lighting device and / or signaling and / or indoor lighting in the context of the implementation of the previous embodiment.
  • a filter 61, 62 is then placed at each of the diodes 20. This has a certain advantage, namely that the filters 61, 62 are not visible when the diodes 20 are off.
  • Said filter may be flat 61 as shown on the figure 6a , or hemispherical 62 as shown on the figure 6b .
  • the filter 61, 62 may be vis-à-vis a single point source of light or extend in front of several point sources of light as for the filter 50 in the embodiment described below.
  • the filter 62 has a cylindrical and non-hemispherical surface.
  • TFT Thin Film Transistor
  • the hue of the light emitted by the diode or diodes is tuned to the hue of the region of the guide 12 in the vicinity of which the diodes are positioned. It may be otherwise. Indeed, it can be envisaged to act on the shade of the zone of the guide 12 which is in the vicinity of said second light sources, or even to give the color both of the lights emitted by these second light sources and by the guide 12.
  • the color match is preferably yellow and / or blue. It can concern all other colors.
  • motor vehicle optical units comprising a plurality of light sources and transmission means for emitting light simultaneously and / or in the same direction.

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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)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Planar Illumination Modules (AREA)
EP14178491.8A 2013-07-30 2014-07-25 Dispositif d'éclairage et/ou de signalisation et bloc optique pour véhicule à moteur comprenant ledit dispositif Active EP2833053B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1357505 2013-07-30

Publications (2)

Publication Number Publication Date
EP2833053A1 EP2833053A1 (fr) 2015-02-04
EP2833053B1 true EP2833053B1 (fr) 2016-03-23

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EP14178491.8A Active EP2833053B1 (fr) 2013-07-30 2014-07-25 Dispositif d'éclairage et/ou de signalisation et bloc optique pour véhicule à moteur comprenant ledit dispositif

Country Status (3)

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EP (1) EP2833053B1 (es)
CN (1) CN104344307B (es)
ES (1) ES2577132T3 (es)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106322268B (zh) * 2015-06-25 2020-04-21 睿能创意公司 车辆、灯具***及其灯具装置
CN108613125B (zh) * 2016-12-23 2023-11-21 市光法雷奥（佛山）汽车照明***有限公司 用于机动车辆的发光装置
FR3079597B1 (fr) * 2018-03-28 2020-10-02 Valeo Vision Module optique pour vehicule automobile
FR3090818B1 (fr) * 2018-12-19 2020-12-25 Plastic Omnium Cie Elément lumineux de pièce de carrosserie en polycarbonate injecté

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10036324A1 (de) * 2000-07-26 2002-02-07 Hella Kg Hueck & Co Mehrkammerleuchte für Fahrzeuge
DE10145901A1 (de) * 2001-09-18 2003-04-03 Automotive Lighting Reutlingen Leuchte, insbesondere Begrenzungs- oder Blinklichtleuchte für ein Kraftfahrzeug
DE10219738A1 (de) * 2002-05-02 2003-11-13 Valeo Beleuchtung Deutschland Beleuchtungseinrichtung für Kraftfahrzeuge
JP4118647B2 (ja) * 2002-10-24 2008-07-16 株式会社小糸製作所 車両用標識灯
CN1981215A (zh) * 2004-06-30 2007-06-13 皇家飞利浦电子股份有限公司 用于车辆头灯单元的灯***
FR2898660B1 (fr) * 2006-03-16 2008-06-13 Automotive Lighting Rear Lamps Feu de signalisation de vehicule automobile a aspect exterieur uniforme.
JP4937649B2 (ja) * 2006-06-28 2012-05-23 株式会社小糸製作所 車両用灯具
US7540638B2 (en) * 2006-11-10 2009-06-02 Ford Global Technologies, Llc Adaptive front lighting system for a vehicle
DE102009053581B3 (de) * 2009-10-05 2011-03-03 Automotive Lighting Reutlingen Gmbh Lichtmodul für eine Beleuchtungseinrichtung eines Kraftfahrzeugs

Also Published As

Publication number Publication date
EP2833053A1 (fr) 2015-02-04
CN104344307B (zh) 2018-06-05
ES2577132T3 (es) 2016-07-13
CN104344307A (zh) 2015-02-11

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