EP3056802B1 - Dispositif d'eclairage d'un module de phare d'un vehicule automobile et procede de fonctionnement d'un dispositif d'eclairage - Google Patents

Dispositif d'eclairage d'un module de phare d'un vehicule automobile et procede de fonctionnement d'un dispositif d'eclairage Download PDF

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Publication number
EP3056802B1
EP3056802B1 EP16000185.5A EP16000185A EP3056802B1 EP 3056802 B1 EP3056802 B1 EP 3056802B1 EP 16000185 A EP16000185 A EP 16000185A EP 3056802 B1 EP3056802 B1 EP 3056802B1
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EP
European Patent Office
Prior art keywords
microlenses
lighting device
converter element
motor vehicle
radiation
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
EP16000185.5A
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German (de)
English (en)
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EP3056802A1 (fr
Inventor
Jürgen Wilhelmy
Daniel Halbig
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.)
Audi AG
Original Assignee
Audi AG
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Filing date
Publication date
Application filed by Audi AG filed Critical Audi AG
Publication of EP3056802A1 publication Critical patent/EP3056802A1/fr
Application granted granted Critical
Publication of EP3056802B1 publication Critical patent/EP3056802B1/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
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/37—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors characterised by their material, surface treatment or coatings
    • 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
    • F21S41/16—Laser 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
    • 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
    • F21S41/176—Light sources where the light is generated by photoluminescent material spaced from a primary light generating element
    • 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
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/337—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector having a structured surface, e.g. with facets or corrugations
    • 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
    • F21S41/36—Combinations of two or more separate reflectors
    • F21S41/365—Combinations of two or more separate reflectors successively reflecting the light
    • 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
    • F21S45/70—Prevention of harmful light leakage

Definitions

  • the present invention relates to a lighting device for a headlamp of a motor vehicle, having a light source for emitting a primary radiation having a first wavelength distribution, with a converter element for converting the primary radiation into a secondary radiation having a second wavelength distribution, and with a deflector, which Reflector element for reflecting the secondary radiation.
  • the invention also relates to a headlamp with such a lighting device.
  • the present invention relates to a motor vehicle with such a headlight.
  • the present invention relates to a method for operating a lighting device for a headlight of a motor vehicle.
  • Lighting devices are known from the prior art, which have a light source for emitting a primary radiation.
  • This light source may include, for example, a laser or laser diodes, with which as the primary radiation light in the blue wavelength range is emitted.
  • This primary radiation can be converted by means of a converter element into a secondary radiation which has a second wavelength distribution.
  • the secondary radiation for example, white light can be provided.
  • such lighting devices may have a reflector element or a reflector for reflecting the secondary radiation.
  • a corresponding light distribution can be provided in front of the motor vehicle.
  • On Safety concept provides, for example, a so-called radiation trap, which is integrated in the deflection device or the reflector element.
  • a so-called radiation trap which is integrated in the deflection device or the reflector element.
  • the radiation trap can be positioned so that it makes harmless the laser radiation or primary radiation in their point of impact.
  • the primary radiation can be completely absorbed in a defect of the converter element with the radiation trap.
  • the secondary radiation is not reflected in the region of the radiation trap and thus does not contribute to the light distribution of the headlight. This can permanently result in a loss of radiation intensity, which is provided by the headlight.
  • the AT 512 588 A1 a light source module for a vehicle headlamp, wherein the light source module has at least one laser light source and at least one illuminating element which can be excited by illumination with laser light for the purpose of emitting visible light.
  • the laser light source and the luminous element are arranged spaced apart on a carrier element.
  • the support member may be at least partially made of a transparent material.
  • the carrier element may have irregularities or microstructures executed on its surface with which the irradiated laser light or the light originating from the luminous element can be deflected and thereby made visible.
  • the illumination device comprises one or more illumination units, wherein a respective illumination unit generates a punctiform light source during operation by means of laser light.
  • an optical device is provided, which is configured and arranged in relation to the illumination unit such that a predetermined light distribution is generated from the light of the point-like light source after passing through the optical device.
  • the illumination unit may, for example, comprise a laser diode with which light in the blue wavelength range can be emitted.
  • the illumination device comprises an excitation light source for emitting blue or ultraviolet excitation light, a conversion medium for converting the excitation light into longer wavelength light such that light reflected from the conversion medium appears white.
  • the illumination device can have a mirror or a mirrored surface through which a part of the secondary radiation can be directed back to the conversion medium.
  • this mirror is arranged such that a part of the reflected blue radiation can fall back to a luminous spot of the conversion medium in order to be converted there into longer-wavelength, yellow light.
  • the describes EP 2 461 092 A2 a vehicular lamp comprising a laser diode and a phosphor for converting the blue light of the laser diode into white light.
  • the vehicle lamp has a reflector with a reflection surface, which reflects the white light.
  • the reflective surface may have an optical structure that disperses the blue light, reflects the blue light back to the phosphor, or lets the blue light pass through the reflective surface to an area behind it.
  • the DE 10 2013 009 459 A1 discloses a lighting device for a vehicle having a reflector which has an at least partially transparent first surface on a front side and a light-reflecting second surface on a rear side.
  • the first surface and the second surface are arranged and formed such that forms a common focal position for both surfaces.
  • the lighting device can be used in a headlight of a motor vehicle.
  • the light source of the lighting device may, for example, comprise at least one laser or one laser diode.
  • the primary radiation can be emitted in the form of light in the blue wavelength range.
  • the converter element With the converter element, the primary radiation can be converted into a secondary radiation, which preferably has a higher wavelength than the primary radiation.
  • the converter element may be a fluorescent converter element.
  • the converter element may for example be formed at least partially from yttrium-aluminum-garnet doped with cerium.
  • the converter element may also be referred to by the term "phosphor".
  • the secondary radiation strikes a deflection device, which has a reflector element. This reflector element can be formed for example by a corresponding reflective coating. With the reflector element, the secondary radiation can be reflected, so that a light distribution can be provided.
  • the deflection device comprises a microlens array which has a plurality of microlenses.
  • the microlenses can have dimensions in the range of micrometers or millimeters.
  • the microlenses can be manufactured by a microtechnical manufacturing process.
  • the microlenses may be arranged in the microlens array in a line-shaped, column-shaped or matrix-like manner.
  • the microlenses are now used to scatter the primary radiation. In other words, instead of a radiation trap, a microlens array is now used with which the primary radiation can be dispersed in the event of a defect of the converter element.
  • a defect of the converter element is present, for example, when the converter element a Has an impurity, a breakage point or the like.
  • the failure of the converter element describes in particular the state in which the converter element does not convert the primary radiation into the secondary radiation.
  • the normally dangerous for living beings primary radiation which is present in particular as a concentrated laser beam, can be expanded or diverged.
  • the radiation intensity can be reduced.
  • it can be achieved that the primary radiation does not pose a threat to living beings and in particular to their eyes.
  • the microlenses are arranged relative to one another such that in each case a gap is arranged between two adjacent microlenses, wherein an absorber element for absorbing the primary radiation is arranged in the intermediate space.
  • the microlenses in the microlens array are arranged at a distance from one another.
  • an absorber element Between the microlenses is an absorber element, with which the primary radiation can be absorbed.
  • the part of the primary radiation which does not directly strike the microlenses and is scattered by them can be absorbed accordingly.
  • a threat to living beings can be prevented by the primary radiation.
  • the primary radiation impinging on the converter element runs along an imaginary line, the microlens array being arranged in a region of an intersection of the imaginary line and the deflection device.
  • the microlens array is applied, for example, on the surface of the deflection device facing the converter element.
  • the microlens array may be applied so that the primary radiation, which passes through the converter element without conversion, strikes the microlens array.
  • the positioning and / or the spatial extent of the microlens array can be determined such that a deflection of the primary radiation at a predetermined angle by the defective converter element is taken into account.
  • the primary radiation can be reliably dissipated at a defect of the converter element.
  • the respective microlenses are at least partially reflective.
  • the respective microlenses may have a reflective surface at least in some areas.
  • the microlenses may be, for example, a coating of a reflective material, in particular a metal.
  • the microlenses are each concave on a side facing the converter element.
  • the microlenses can be designed as scattering lenses, with which the primary radiation, which is present in particular as a concentrated laser beam, can be widened.
  • the radiation energy of the primary radiation can be reduced.
  • the radiation energy can be reduced in a predetermined area in front of the headlight, for example at a distance of 2 meters in front of the headlight.
  • the microlenses each have a radius in a range between 0.1 millimeter and 1 millimeter.
  • the microlenses each have a radius of 0.5 millimeters.
  • the complete microlens array for example, have a diameter in the range between 10 and 20 millimeters.
  • the microlens array has a plurality of individual microlenses. It can thus be achieved that the concentrated primary radiation which impinges on the respective microlenses can be reliably dispersed.
  • An inventive headlight for a motor vehicle comprises a lighting device according to the invention.
  • the headlight can be designed in particular as a headlight.
  • a motor vehicle according to the invention comprises at least one headlight according to the invention.
  • Each headlight of the motor vehicle preferably comprises a lighting device according to the invention.
  • the headlamps for example, a low beam, a high beam, a daytime running light, a city light, a highway light or the like can be provided.
  • the motor vehicle is designed in particular as a passenger car.
  • An inventive method is used to operate a lighting device for a motor vehicle.
  • a primary radiation having a first wavelength distribution is emitted by means of a light source.
  • the primary radiation is converted by means of a converter element into a secondary radiation converted with a second wavelength distribution.
  • the secondary radiation is reflected by means of a reflector element of a deflection device.
  • the deflection device has a microlens array with a plurality of microlenses, wherein the primary radiation is scattered by means of at least one of the microlenses in case of failure of the converter element, the microlenses are arranged to each other, that between each two adjacent microlenses each a space is arranged, and wherein in the intermediate space an absorber element for absorbing the primary radiation is arranged.
  • Fig. 1 shows a motor vehicle 1 according to an embodiment of the present invention in a plan view.
  • the motor vehicle 1 is formed in the present embodiment as a passenger car.
  • the motor vehicle 1 comprises two headlights 2, which are designed as front headlights.
  • the headlights 2 each comprise a lighting device 3.
  • Fig. 2 shows an embodiment of the lighting device 3 in a sectional side view.
  • the illumination device 3 comprises a light source 4 which comprises, for example, at least one laser or one laser diode.
  • a primary radiation 5 can be emitted with a first wavelength distribution.
  • 4 light in the blue wavelength range can be emitted with the light source.
  • the primary radiation 5 is optionally conducted by the light source 4 via an integrator 6 to a deflection mirror 7.
  • the deflecting mirror 7 deflects the primary radiation 5 to a converter element 8.
  • the converter element 8 serves to convert the primary radiation 5 into a secondary radiation 9.
  • the secondary radiation 9 has a second wavelength distribution.
  • the secondary radiation 9 is light in the white wavelength range.
  • the light source 4, the integrator 6, the deflection mirror 7 and the converter element 8 are arranged in a housing 14.
  • the secondary radiation 9 is also scattered by the converter element 8. This is shown here by the individual light beams.
  • the secondary radiation 9 strikes a deflection device 10.
  • the deflection device 10 has, on a side 11 facing the converter element 8, a reflector element 12 which serves to deflect the secondary radiation 9.
  • the reflector element 12 can be provided for example by a metallic coating.
  • the deflection device 10 comprises a microlens array 13, which is shown only schematically here.
  • the microlens array 13 further serves to reflect or deflect the secondary radiation 9, in the present case an ideal deflection or reflection of the secondary radiation 9 through the microlens array 13 is shown.
  • the light rays of the secondary radiation 9 impinging on the microlens array 13 are scattered by the microlens array 13.
  • Fig. 3 shows the lighting device 3 in a perspective view.
  • the converter element 8 has a defect.
  • the primary radiation 5 is not converted by the converter element 8 into the secondary radiation 9.
  • the primary radiation 5 strikes the microlens array 13 as a concentrated laser beam directly.
  • the microlens array 13 is a plurality of microlenses 16.
  • the arrangement of the microlenses 16 in the microlens array is particularly in Fig. 4 which shows a further perspective view of the lighting device 3.
  • the microlenses 16 are arranged in a matrix-like manner in rows and columns in the microlens array 13.
  • the individual microlenses 16 may, for example, have a radius of 0.5 millimeters.
  • the microlenses 16 may be made of a glass or of a plastic. In addition, the microlenses 16 may have a reflective coating. With the respective microlenses 16, the primary radiation 5, which strikes the microlens array 13, can be scattered. This is illustrated by the light beam 15 in the present case. Thus, the dangerous primary radiation 5 or laser radiation can be scattered. Thus, the intensity of the primary radiation can be reduced and thus endangerment of living beings can be prevented.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Claims (8)

  1. Dispositif d'éclairage (3) pour un phare (2) d'un véhicule automobile (1), avec une source de lumière (4) pour l'émission d'un rayonnement primaire (5), lequel présente une première distribution de longueur d'onde, avec un élément convertisseur (8) pour la conversion du rayonnement primaire (5) en un rayonnement secondaire (9), lequel présente une deuxième distribution de longueur d'onde, et avec un dispositif de déflexion (10), lequel présente un élément réflecteur (12) pour la réflexion du rayonnement secondaire (9),
    caractérisé en ce que
    le dispositif de déflexion (10) présente un réseau de micro-lentilles (13) avec une pluralité de micro-lentilles (16), dans lequel au moins une des micro-lentilles (16) est conçue pour diffuser le rayonnement primaire (5) lors d'une panne de l'élément convertisseur (8), dans lequel les micro-lentilles (16) sont agencées l'une par rapport à l'autre de sorte que respectivement un espace intermédiaire est agencé entre deux micro-lentilles (16) adjacentes, dans lequel un élément absorbeur est agencé dans l'espace intermédiaire pour l'absorption du rayonnement primaire (5).
  2. Dispositif d'éclairage (3) selon la revendication 1,
    caractérisé en ce que
    le rayonnement primaire (5) incident sur l'élément convertisseur (8) s'étend le long d'une ligne imaginaire, dans lequel le réseau de micro-lentilles (13) est agencé dans une zone d'un point d'intersection de la ligne imaginaire et du dispositif de déflexion (10).
  3. Dispositif d'éclairage (3) selon la revendication 1 ou 2,
    caractérisé en ce que
    les micro-lentilles (16) respectives sont réalisées en miroir au moins par zone.
  4. Dispositif d'éclairage (3) selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les micro-lentilles (16) sont réalisées concaves respectivement au niveau d'un côté tourné vers l'élément convertisseur (8).
  5. Dispositif d'éclairage (3) selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les micro-lentilles (16) présentent respectivement un rayon dans une plage entre 0,1 mm et 1 mm.
  6. Phrase (2) pour un véhicule automobile (1) avec un dispositif d'éclairage (3) selon l'une quelconque des revendications précédentes.
  7. Véhicule automobile (1) avec au moins un phare (2) selon la revendication 6.
  8. Procédé de fonctionnement d'un dispositif d'éclairage (3) pour un véhicule automobile (1), dans lequel un rayonnement primaire (5), lequel présente une première distribution de longueur d'onde, est émis au moyen d'une source de lumière (4), le rayonnement primaire (5) est converti en un rayonnement secondaire (9), lequel présente une deuxième distribution de longueur d'onde, au moyen d'un élément convertisseur (8) et le rayonnement secondaire (9) est réfléchi au moyen d'un élément réflecteur (12) d'un dispositif de déflexion (10),
    caractérisé en ce que
    le dispositif de déflexion (10) présente un réseau de micro-lentilles (13) avec une pluralité de micro-lentilles (16), dans lequel le rayonnement primaire (5) est diffusé au moyen d'au moins une des micro-lentilles (16) lors d'une panne de l'élément convertisseur (8), dans lequel les micro-lentilles (16) sont agencées l'une par rapport à l'autre de sorte que respectivement un espace intermédiaire est agencé entre deux micro-lentilles (16) adjacentes, et dans lequel un élément absorbeur est agencé dans l'espace intermédiaire pour l'absorption du rayonnement primaire (5).
EP16000185.5A 2015-02-10 2016-01-27 Dispositif d'eclairage d'un module de phare d'un vehicule automobile et procede de fonctionnement d'un dispositif d'eclairage Active EP3056802B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015001695.4A DE102015001695A1 (de) 2015-02-10 2015-02-10 Beleuchtungsvorrichtung für einen Scheinwerfer eines Kraftfahrzeugs sowie Verfahren zum Betreiben einer Beleuchtungsvorrichtung

Publications (2)

Publication Number Publication Date
EP3056802A1 EP3056802A1 (fr) 2016-08-17
EP3056802B1 true EP3056802B1 (fr) 2019-06-19

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP16000185.5A Active EP3056802B1 (fr) 2015-02-10 2016-01-27 Dispositif d'eclairage d'un module de phare d'un vehicule automobile et procede de fonctionnement d'un dispositif d'eclairage

Country Status (2)

Country Link
EP (1) EP3056802B1 (fr)
DE (1) DE102015001695A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018124743A1 (de) * 2018-10-08 2020-04-09 Automotive Lighting Reutlingen Gmbh Beleuchtungseinrichtung für ein Kraftfahrzeug und Kraftfahrzeug mit einer solchen Beleuchtungseinrichtung

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JP4010084B2 (ja) * 1999-10-21 2007-11-21 市光工業株式会社 小型光源モジュール及び光源ユニット
JP5210061B2 (ja) * 2008-07-10 2013-06-12 株式会社小糸製作所 灯具
JP5499592B2 (ja) * 2009-09-17 2014-05-21 ソニー株式会社 ライトガイド、光源装置及び読取装置
JP5657357B2 (ja) * 2010-12-01 2015-01-21 スタンレー電気株式会社 車両用灯具
JP2013012358A (ja) * 2011-06-28 2013-01-17 Sharp Corp 照明装置および車両用前照灯
DE102011085378A1 (de) 2011-10-28 2013-05-02 Bayerische Motoren Werke Aktiengesellschaft Beleuchtungseinrichtung für ein Kraftfahrzeug
WO2013072429A1 (fr) * 2011-11-17 2013-05-23 Osram Gmbh Dispositif d'éclairage à del
DE102012200903A1 (de) * 2012-01-23 2013-07-25 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Optikanordnung und Verfahren zur optischen Abtastung einer Objektebene mit einem Mehrkanalabbildungssystem
AT512588B1 (de) 2012-03-12 2014-12-15 Zizala Lichtsysteme Gmbh Lichtquellenmodul mit Laserlichtquelle sowie Fahrzeugscheinwerfer
AT512587B1 (de) * 2012-03-12 2013-11-15 Zizala Lichtsysteme Gmbh Optikelement für einen Laser-Fahrzeugscheinwerfer sowie Lichtquellenmodul und Fahrzeugscheinwerfer
DE102012005660A1 (de) 2012-03-22 2013-09-26 Schott Ag Beleuchtungseinrichtung zur Erzeugung von Licht mit hoher Leuchtdichte
DE102013009459A1 (de) * 2013-06-06 2013-12-19 Daimler Ag Beleuchtungsvorrichtung für ein Fahrzeug

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DE102015001695A1 (de) 2016-08-11
EP3056802A1 (fr) 2016-08-17

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