EP2013535B1 - Phare de véhicule automobile - Google Patents

Phare de véhicule automobile Download PDF

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Publication number
EP2013535B1
EP2013535B1 EP07723957A EP07723957A EP2013535B1 EP 2013535 B1 EP2013535 B1 EP 2013535B1 EP 07723957 A EP07723957 A EP 07723957A EP 07723957 A EP07723957 A EP 07723957A EP 2013535 B1 EP2013535 B1 EP 2013535B1
Authority
EP
European Patent Office
Prior art keywords
infrared radiation
motor vehicle
permeable
filter device
vehicle headlight
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.)
Ceased
Application number
EP07723957A
Other languages
German (de)
English (en)
Other versions
EP2013535A1 (fr
Inventor
Helmut Erdl
Norbert Kolb
Patrick Kuhl
Joachim Ripperger
Johannes Aulbach
Martin Enders
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP2013535A1 publication Critical patent/EP2013535A1/fr
Application granted granted Critical
Publication of EP2013535B1 publication Critical patent/EP2013535B1/fr
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/04—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for filtering out infrared radiation
    • 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]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel 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
    • F21S41/17—Discharge light sources
    • F21S41/172—High-intensity discharge 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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/68—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens
    • F21S41/683—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens by moving screens
    • 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
    • F21Y2113/00—Combination of light sources
    • 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
    • F21Y2113/00—Combination of light sources
    • F21Y2113/30—Combination of light sources of visible and non-visible spectrum
    • 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 invention relates to a motor vehicle headlight with a base light source.
  • bi-xenon and bi-halogen headlamps which use a metal diaphragm in the beam path of the basic light source, in this case the xenon or halogen lamp, in particular the projection module of the headlamp, to detect the dark region of the low-beam light distribution above the light-dark Create border.
  • the maximum illuminance levels in this area are defined by the legislator.
  • the metal panel is movable and can be guided out of the beam path of the base light source in order to generate a high beam distribution with the same headlight.
  • the lens of the projection module Since no radiation penetrates into the dark region of the low-beam light distribution due to the conventional metal diaphragm in the beam path of the projection module, the lens of the projection module must be designed such that it generates the (visible) scattered light for the region above the cut-off line, also in the Dark area to recognize signs, for example. As a result, the light levels in the area of the optical headlight axis are reduced and the reach of the headlight is reduced. The cold, daylight-like color of the xenon headlights can lead to psychological glare in other road users.
  • document EP 1 160 506 shows a motor vehicle headlamp with a permeable to infrared radiation filter device having two operating positions, in the beam path of the light source and outside the beam path of the light source.
  • the invention is based on the object to provide a motor vehicle headlight that can be used efficiently.
  • the invention is therefore based on the idea of equipping a motor vehicle headlight which can be operated in at least two operating modes with a basic light source and a filter device which is substantially transparent to infrared radiation. It is then, for example, required for the operation of an active night vision system, infrared radiation at least partially generated by the base light source, which emits in addition to the visible portion and an infrared component.
  • the filter device is designed and positioned such that in a first operating mode, for example a low-beam operating mode, the beams of the basic light source are partly unfiltered (at least with respect to said filter device) and partly after filtering with that for infrared radiation substantially permeable filter device are emitted by the motor vehicle headlight. In a second operating mode, for example a high-beam operating mode, the filter device is positioned such that the beams of the basic light source are emitted unfiltered (at least with regard to the aforementioned filter device) by the motor vehicle headlight.
  • an infrared radiation device which may be integrated in the motor vehicle headlight, activated to emit enough infrared radiation for the operation of a night vision system by the motor vehicle headlight. It is thereby achieved that enough infrared radiation is radiated by the infrared radiation device and the base light source in the first mode to an active To operate night vision system with satisfactory range.
  • the infrared radiation device can be operated with lower power, which also cost advantages, and space can be saved in the headlight housing.
  • the infrared radiation device comprises, for example, an infrared source and / or an infrared reflector. Activation of the infrared radiation device accordingly comprises, for example, activation of the infrared source and / or irradiation of the infrared reflector with an infrared source.
  • the filter means is designed to be in the infrared spectral range for more than 40%, 50%. 60%, 70%, 80%, 90% or 95% of the radiant flux is permeable.
  • the infrared radiation device is preferably deactivated in the second operating mode, for example in a high-beam operating mode, since in this operating mode the visible light generated by the basic light source and emitted by the motor vehicle headlight is sufficient to operate an active night vision system. As a result, the motor vehicle headlight can be operated energy-efficiently.
  • the infrared radiation device is positioned, in particular in the first operating mode, in such a way that in the first operating mode, beams radiated by the infrared radiation device lie in the beam path of the light emitted by the base light source.
  • the infrared radiation device is particularly preferably connected to the filter device permeable to infrared radiation, and / or the filter device substantially transparent to infrared radiation can be positioned in such a way that beams radiated by the infrared radiation device in the first operating mode in the beam path of the Base light source radiated light lie.
  • the infrared radiation permeable filter device carries the infrared radiation device.
  • the infrared radiation substantially transparent filter device is opaque to visible light.
  • the filter device is designed such that it is transparent in the visible spectral range for less than 5%, 10%, 15%, 20%, 30%, 40%, 50% or 60% of the radiant flux.
  • the required light called “scattered light” can be generated in the dark region of the low-beam light distribution above the cut-off line.
  • the scattered light for the dark area above the cut-off line for example, no longer needs to be generated with the lens of a projection module.
  • the lens can therefore be optimized with respect to other parameters, such as the range of the motor vehicle headlight. In addition, this can mask an unwanted reddish glow of the near infrared radiation, which is otherwise visible to the human eye in the region of the filter device.
  • the filter device is advantageously designed such that this small proportion in the visible spectral range, for which the filter device is permeable, comprises one or more predetermined wavelength ranges, whereby the light color of the visible light for which the filter device is permeable can be designed freely.
  • the scattered light can be given any color within the legal limits.
  • the scattered light is given by the filter device a warm color, in particular with a color temperature in the range of 2500 to 3500 Kelvin, which reduces the risk of so-called psychological glare other road users.
  • the filter device which is substantially transparent to infrared radiation, acts as a diaphragm, in particular for visible light, in the first operating mode.
  • the filter device which is substantially permeable to infrared radiation is embodied in a planar manner and, in the first operating mode, is partially positioned in the beam path of the base light source so that the surface normal of the filter device substantially corresponds to the beam direction of the motor vehicle headlight. That from the base light source radiated visible light hits partially - directly or indirectly (for example, after a reflection) - on acting as a shutter for visible light filter device.
  • the filter device only less than 5%, 10%, 15%, 20%, 30%, 40%, 50% or 60% pass through the filter device in the visible spectral range.
  • the remaining visible light striking the filter means is substantially reflected or absorbed by the filter means. Since the filter device only partially obscures or only partially covers the beam path of the base light source in the first operating mode (for example to a ratio of between 40% and 60% or 30% and 70% or 20% and 80%), this can be done in addition to Filtering device emerging visible light of the base light source in the first mode, for example, a low beam are realized whose bright-dark boundary can be defined by the edge of the aperture and / or filter device. In the second operating mode, the filter device acting as a visible light stop is not positioned, or at most insignificantly, in the beam path of the base light source.
  • the motor vehicle headlight based on the basic light source generates in both modes, for example, a high beam distribution in the infrared spectral range and depending on the operating mode or aperture and / or Filter foundedsposition a low beam or high beam distribution or other light distributions in the visible spectral range.
  • a low beam distribution and in the second mode produces a high beam distribution
  • still in the first mode emitted by the basic light source in the infrared range radiation can be used at least approximately completely for the operation of an active night vision system.
  • the filter device permeable to infrared radiation comprises an interference filter.
  • the interference filter only passes radiation within one or more predetermined frequency bands. Radiation of other wavelengths, however, is particularly well reflected.
  • the infrared radiation device is preferably semiconductor-based, for example based on an infrared diode or an infrared laser.
  • the basic light source is embodied as a halogen lamp, as a gas discharge lamp, in particular a xenon lamp, or semiconductor-based, and is preferably prepared in such a way that it emits electromagnetic radiation predominantly or predominantly in the visible spectral range.
  • a motor vehicle headlight is created, which is energy-efficient use in different modes, and also economically produced or can be integrated into a vehicle.
  • FIG. 1 a motor vehicle headlight 1 is shown, which has as base light source 2, a gas discharge lamp, in particular a xenon lamp.
  • An infrared radiation device 3 which may comprise a plurality of infrared light-emitting diodes, is supported by a diaphragm 5 which, depending on the operating mode of the motor vehicle headlight 1, can be positioned in various positions. This positionability is illustrated by the double arrow.
  • the base light source 2, the diaphragm 5 and thus also the infrared radiation device 3 are supported by a support means 4, which in the example also carries or comprises the housing, the reflector and the cover of the motor vehicle headlight.
  • a support means 4 which in the example also carries or comprises the housing, the reflector and the cover of the motor vehicle headlight.
  • other components such as a lens, not shown, and not shown filter means may be provided.
  • the diaphragm 5 is in this case completely or partially designed as a filter device which is substantially transparent to radiation in the infrared spectral range, and which is substantially impermeable to radiation in the visible spectral range.
  • the diaphragm 5 together with infrared radiation device 3 is positioned in front of the basic light source 2, so that only part of the light emitted by the base Light source 2 radiated visible light emitted by the motor vehicle headlight 1, but at least approximately the entire proportion of radiated from the base light source 2 infrared radiation is emitted by the motor vehicle headlight 1.
  • the rays 7, 6 shown in dashed lines include visible and infrared spectral components.
  • the beams 8 shown in dotted lines essentially comprise only infrared spectral components, since the visible spectral components are reflected or absorbed by the diaphragm 5. This results in a dark area at the top with regard to the visible spectral components, a bright area at the bottom and a light-dark boundary defined by the diaphragm or the filter device.
  • the infrared radiation device 3 is activated in order, by the motor vehicle headlight 1, to radiate a total of sufficient infrared radiation for the use of an active night vision system.
  • the light distribution of the infrared radiation corresponds in the first mode substantially the light distribution of the visible light in the second mode ( Femlichtver gutter).
  • the aperture 5 together with infrared radiation device 3 is not positioned in front of the base light source 2 but retracted or pivoted out of the beam path of the base light source 2.
  • the infrared radiation device 3 is deactivated, since the visible spectral component emitted by the base light source is radiated almost completely through the motor vehicle headlight 1, and thereby, for example, the visible spectral component is sufficient to operate an active night vision system, so that the Using an active night vision system no further infrared radiation needs to be generated.
  • the filter device comprises an interference filter, which consists for example of several thin layers, between which there is the reflection of the incident light. Superposition of the reflected waves leads to interference phenomena. With suitably chosen layer thickness then light of certain wavelengths (usually a certain frequency band) is extinguished by this interference, so not transmitted through the interference filter, while light of other wavelength is passed through the interference filter. As a result, the interference filter passes only a certain frequency band.
  • a filter device can be realized which is permeable to visible light in predetermined visible wavelength ranges and / or in predetermined beam directions. It can thereby be achieved that in the first operating mode (diaphragm or filter device in the beam path of the base light source) a so-called scattered light, in particular in a predetermined wavelength range or in predetermined wavelength ranges, in the actually dark region or above the light source, is emitted by the motor vehicle headlight. Dark border is radiated.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

L'invention concerne un phare de véhicule automobile (1) avec une source de lumière de base (2) et un dispositif de filtres (5) transparent au rayonnement infrarouge positionnable dans au moins deux positions, le phare de véhicule automobile (1) pouvant être utilisé dans au moins deux types de fonctionnement, le dispositif de filtres (5) transparent au rayonnement infrarouge étant positionné dans un premier type de fonctionnement partiellement dans le chemin optique de la source de lumière de base (2), et le dispositif de filtres (5) transparent au rayonnement infrarouge étant positionné dans un deuxième type de fonctionnement à l'extérieur du chemin optique de la source de lumière de base (2).

Claims (9)

  1. Projecteur de véhicule automobile (1) comprenant:
    - une source lumineuse de base (2) et une installation de filtre (5) qui peut être mise dans au moins deux positions pour la transparence au rayonnement infrarouge,
    - le projecteur de véhicule automobile (1), fonctionnant selon au moins deux modes de fonctionnement,
    - l'installation de filtre (5) transparente au rayonnement infrarouge, pouvant être placée au moins en partie dans le chemin du faisceau lumineux de la source lumineuse de base (2) dans un premier mode de fonctionnement, et
    - l'installation de filtre transparente (5) au rayonnement infrarouge, pouvant être positionnée en dehors du chemin du faisceau lumineux de la source lumineuse de base (2) dans le second mode de fonctionnement,
    caractérisé en ce que
    le projecteur comporte une installation de rayonnement infrarouge (3) activée dans le premier mode de fonctionnement et désactivée dans le second mode de fonctionnement.
  2. Projecteur de véhicule automobile (1) selon la revendication 1,
    selon lequel
    l'installation de rayonnement infrarouge (3) est reliée à l'installation de filtre (5) transparente au rayonnement infrarouge, et
    l'installation de filtre (5) transparente au rayonnement infrarouge, se positionnant de façon que, dans le premier mode de fonctionnement, le faisceau lumineux émis par l'installation de rayonnement infrarouge (3), se situe dans le chemin du faisceau de lumière émis par la source lumineuse de base (2).
  3. Projecteur de véhicule automobile (1) selon l'une des revendications précédentes,
    selon lequel
    l'installation de filtre (5) transparente au rayonnement infrarouge, porte l'installation de rayonnement infrarouge (3).
  4. Projecteur de véhicule automobile (1) selon l'une des revendications précédentes,
    selon lequel
    l'installation de filtre (5) transparente au rayonnement infrarouge, est opaque à la lumière visible.
  5. Projecteur de véhicule automobile (1) selon l'une des revendications précédentes,
    selon lequel
    l'installation de filtre (5) transparente au rayonnement infrarouge, agit comme écran à la lumière visible pour le premier mode de fonctionnement.
  6. Projecteur de véhicule automobile (1) selon l'une des revendications précédentes,
    selon lequel
    l'installation de filtre (5) transparente au rayonnement infrarouge, comporte un filtre à interférences.
  7. Projecteur de véhicule automobile (1) selon l'une des revendications précédentes,
    selon lequel
    l'installation de filtre (5) transparente au rayonnement infrarouge, est transparente également pour au moins une plage de longueurs d'onde dans le domaine visible.
  8. Projecteur de véhicule automobile (1) selon l'une des revendications précédentes,
    selon lequel
    l'installation de rayonnement infrarouge (3), est à base de semi-conducteurs.
  9. Projecteur de véhicule automobile (1) selon l'une des revendications précédentes,
    selon lequel
    la source lumineuse de base (2), est une lampe à halogène, une lampe à décharge de gaz et notamment, une lampe xénon ou une lampe utilisant des semi-conducteurs.
EP07723957A 2006-04-28 2007-04-04 Phare de véhicule automobile Ceased EP2013535B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006019735A DE102006019735A1 (de) 2006-04-28 2006-04-28 Kraftfahrzeugscheinwerfer
PCT/EP2007/003016 WO2007124836A1 (fr) 2006-04-28 2007-04-04 Phare de véhicule automobile

Publications (2)

Publication Number Publication Date
EP2013535A1 EP2013535A1 (fr) 2009-01-14
EP2013535B1 true EP2013535B1 (fr) 2010-06-02

Family

ID=38267629

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07723957A Ceased EP2013535B1 (fr) 2006-04-28 2007-04-04 Phare de véhicule automobile

Country Status (3)

Country Link
EP (1) EP2013535B1 (fr)
DE (2) DE102006019735A1 (fr)
WO (1) WO2007124836A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007010724A1 (de) * 2007-02-26 2008-08-28 Schefenacker Vision Systems Germany Gmbh Leuchte für Fahrzeuge, insbesondere für Kraftfahrzeuge

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10027018B4 (de) * 2000-05-31 2010-09-09 Robert Bosch Gmbh Fahrzeugscheinwerfer nach dem Projektionsprinzip und Beleuchtungseinrichtung eines Fahrzeugs mit wenigstens einem solchen Scheinwerfer
DE10047207A1 (de) * 2000-09-23 2002-04-11 Hella Kg Hueck & Co Scheinwerfer für Fahrzeuge
FR2840389B1 (fr) * 2002-06-04 2004-12-03 Valeo Vision Projecteur d'eclairage elliptique comportant une source lumineuse secondaire
DE10254023A1 (de) * 2002-11-20 2004-06-03 Automotive Lighting Reutlingen Gmbh Scheinwerferanordnung für Fahrzeuge sowie Vorrichtung zur Visualisierung eines Sichtfeldes in Fahrtrichtung eines Fahrzeuges
DE10301830A1 (de) * 2003-01-20 2004-07-29 Robert Bosch Gmbh Scheinwerfer für Fahrzeuge
DE10355747B4 (de) * 2003-08-28 2014-10-09 Automotive Lighting Reutlingen Gmbh Kraftfahrzeugscheinwerfer zur Erzeugung unterschiedlicher Leuchtfunktionen
DE10347951B4 (de) * 2003-10-15 2012-12-27 Automotive Lighting Reutlingen Gmbh Beleuchtungseinrichtung für Fahrzeuge

Also Published As

Publication number Publication date
DE102006019735A1 (de) 2007-10-31
EP2013535A1 (fr) 2009-01-14
WO2007124836A1 (fr) 2007-11-08
DE502007004017D1 (de) 2010-07-15

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