EP2745042A1 - Vehicle headlight with laser light source - Google Patents

Vehicle headlight with laser light source

Info

Publication number
EP2745042A1
EP2745042A1 EP13714533.0A EP13714533A EP2745042A1 EP 2745042 A1 EP2745042 A1 EP 2745042A1 EP 13714533 A EP13714533 A EP 13714533A EP 2745042 A1 EP2745042 A1 EP 2745042A1
Authority
EP
European Patent Office
Prior art keywords
laser light
light source
vehicle headlight
vehicle
luminous element
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.)
Granted
Application number
EP13714533.0A
Other languages
German (de)
French (fr)
Other versions
EP2745042B1 (en
Inventor
Friedrich Bauer
Andreas Moser
Johann ALTMANN
Erich Kaufmann
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.)
ZKW Group GmbH
Original Assignee
Zizala Lichtsysteme GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=48049716&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2745042(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Zizala Lichtsysteme GmbH filed Critical Zizala Lichtsysteme GmbH
Publication of EP2745042A1 publication Critical patent/EP2745042A1/en
Application granted granted Critical
Publication of EP2745042B1 publication Critical patent/EP2745042B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/19—Attachment of light sources or lamp holders
    • 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
    • F21S41/12—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of emitted light
    • F21S41/13—Ultraviolet light; Infrared 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
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/16—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
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • 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
    • F21S45/10—Protection of lighting devices
    • 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
    • F21S45/42—Forced cooling
    • F21S45/43—Forced cooling using gas
    • 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
    • F21S45/49—Attachment of the cooling means
    • 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
    • F21S45/60—Heating of lighting devices, e.g. for demisting
    • 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
    • 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

Definitions

  • the invention relates to a vehicle headlamp having at least one laser light source, at least one illuminating element which can be excited to emit visible light, which can be irradiated by the laser light source, and at least one imaging optical element, for example a reflector and / or a lens.
  • a light source for example, a phosphorus compound or a cerium-doped YAG crystal
  • a laser light source for example, a phosphorus compound or a cerium-doped YAG crystal
  • the phosphor converter thus converts laser light into light of other wavelengths.
  • US 2011/0194302 Al shows such a light source, where a laser diode radiates via a light guide from behind on a fluorescent substance, which in turn emits visible light, which is directed over a reflector screen in the direction of travel.
  • the laser light sources used for this purpose emit energies of up to 3 W in the main emission direction of the headlamp; in the event of a malfunction or damage to the headlamp, high-intensity, eye-damaging laser light radiation can lead to injuries or endanger other road users.
  • This object is achieved with a vehicle headlight mentioned above according to the invention in that the laser light source in the main emission direction of the vehicle headlight Fers seen before the light-emitting element is arranged, so that the light of the laser light source is emitted against the main emission of the vehicle headlight.
  • the vehicle headlamp according to the invention emits the laser radiation counter to the main beam direction, even in the event of malfunction or damage to the headlamp, the laser radiation can not escape. Other road users are not endangered if the headlight is damaged, for example, by an accident.
  • the imaging optical element e.g., reflector, lens
  • the invention allows the realization of a vehicle headlamp, which can meet the legal requirements such as ECE, SAE, CCC, etc.
  • the beam direction of the laser light source extends at an angle between 0 ° and 90 ° to the optical axis of the vehicle headlight.
  • This can be arranged in various ways depending on the available space and application, the laser light source.
  • the inventive advantage of the radiation against the main emission of the headlamp and thus the protection of other road users in case of damage or malfunction are ensured.
  • the laser light source is arranged with respect to the luminous element on a cone shell of a straight circular cone, the tip of the circular cone lies in the luminous element, the cone axis is parallel to the optical axis of the vehicle headlight and the generatrix of the cone sheath on which the laser light source is arranged, parallel to the beam direction the laser light source runs.
  • the laser light source can thus be positioned in a variety of ways, wherein it can be arranged on its surface line either in the region of the cone base or at any position between the apex of the cone and the point of intersection between the cone tip and the base surface.
  • the luminous element is arranged on the optical axis of the vehicle headlight.
  • the luminous element is arranged in a focal point of the reflector. This makes it possible to ensure optimal utilization of the light emitted by the luminous element or to achieve a high luminance.
  • at least one lens element in particular a collecting lens element, is arranged between the laser light source and the luminous element.
  • the irradiation of the laser light into the luminous element can be optimized, in particular with regard to the excitation energy distribution in the luminous element.
  • the energy of the laser light source can be advantageously concentrated on or in the luminous element. In addition, it is ensured by the concentration of light on the light element even with shake-induced minimal shifts of the light source by the resulting tolerances that the light element is taskally made by the laser light and the headlamp lights.
  • the laser light source is arranged below a running in the installed state of the vehicle headlamp through the optical axis of the vehicle headlamp horizontal plane.
  • the operation of laser light sources usually produces a lot of waste heat.
  • the vehicle headlight has a cover disk and the laser light source is arranged so close to the cover disk that the cover disk can be heated by means of the waste heat of the laser light source.
  • the waste heat of the laser light source can be used to dethrone or defrost the cover of the vehicle headlight.
  • the laser light source has at least one heat sink and / or at least one ventilation device.
  • the heat sink consists for example of a thermally conductive material, which may be provided on its surface with additional heat dissipating elements such as cooling fins.
  • the ventilation device may be, for example, a ventilation device with which cool air can be brought to the heat sink or to the laser light source and at the same time warm air can be removed.
  • At least one design aperture element surrounding the laser light source as privacy screen is provided.
  • This design aperture element can be embodied as a cover or envelope of the laser light source and serves inter alia to prevent the laser light source from being visible from the outside.
  • the laser light source is arranged inside or below this design diaphragm element.
  • the design diaphragm element has at least one design diaphragm opening, which is preferably nozzle-shaped is executed.
  • the nozzle aperture opening is favorably oriented in the direction of a cover of the vehicle headlight.
  • the waste heat of the laser light source in the direction of the cover.
  • the term "nozzle-shaped" is to be understood here as an embodiment which permits an alignment of the air flow passing through the design aperture opening.
  • the said invention is implemented as a free-jet concept, the laser light source therefore radiates directly onto the luminous element.
  • at least one light-guiding element is arranged between the laser light source and the luminous element.
  • the light guide serves mainly to compensate for deviations of the beam direction of the laser light source of the ideal beam direction, so that the light of the laser light source optimally guided in the direction of the light emitting element (or bundled depending on the design of the light guide).
  • This light-guiding element consists of a light-conducting material, for example plastic such as polycarbonate (PC) or polymethyl methacrylate (PMMA or plexiglass) or glass, and can be shaped as desired, for example tubular, conical or cylindrical.
  • a design as a funnel-shaped concen- trator element for example made of glass, whereby, similar to a luminous bar, the total reflection at the boundary surfaces of the concentrator element is utilized.
  • the light-guiding element can be provided with irregularities, for example on the surface (in the form of microstructures), which deflect the laser light and thus cause the light-conducting element to shine, which can be used as a design element. For example, when using a blue laser light source such a blue eyes that do not endanger the eyes can be generated.
  • At least one diaphragm element is provided for shielding laser light emerging from the vehicle headlight.
  • Such diaphragm elements can be designed, for example, with an absorbent or opaque surface or with a surface which prevents the passage of laser light.
  • these diaphragm elements can be arranged in areas where laser light could otherwise escape from the vehicle headlight by reflection, or the diaphragm element can be designed as a device surrounding the laser beam (or the above-mentioned light guide elements).
  • FIG. 1 is a partial cross-sectional view of a vehicle headlamp according to the invention.
  • Fig. 2 is an illustration of the possible relative arrangement of laser light source and light emitting element according to a variant of the invention.
  • a vehicle headlight 1 is shown in a sectional view in cross section. Only the essential features for the understanding of the invention are shown, since those skilled in the other elements of a vehicle headlamp are known.
  • the vehicle headlight 1 comprises a laser light source 2 which emits, for example, in a wavelength range between 200 nm and 450 nm, that is to say partially in the non-visible UV range.
  • the power of the laser light source 2 is currently between 0.5 and 2 W, but may be higher.
  • the laser light source 2 is, for example, a semiconductor laser in the form of a laser diode or a VCSEL (Vertical Cavity Surface Emitting Laser). It is also possible to provide a plurality of laser light sources 2, for example in the form of laser diode arrays.
  • the laser light source 2 has to dissipate the heat generated during operation in the illustrated embodiment, a heat sink 15 and a ventilation device 16 - the ventilation device 16 serves here, the cooling body 15 to supply cool air or dissipate heated air.
  • the ventilation device 16 may for example comprise a ventilation device.
  • the heat sink 15 may be made of a suitable material and in addition, for example, cooling fins or the like. exhibit.
  • a luminous element 3 is provided which is spherical in the present embodiment. The spherical design is only one of several possible configurations, the light-emitting element 3 can also be designed differently.
  • the luminous element 3 is preferably a phosphor converter, which can be excited by the light of the laser light source 2 in a known manner for the emission of visible light.
  • a phosphor converter which can be excited by the light of the laser light source 2 in a known manner for the emission of visible light.
  • all materials which convert monochromatic laser light into light of other wavelengths preferably white light which results from superimposition
  • the phosphorus converter is thus a light converter - the electrons of the converter material are excited by the laser light into higher energy levels and emit light when falling back the wavelength difference corresponding to the level difference.
  • the luminous element 3 is arranged in a reflector 4, which directs the light emitted by the luminous element 3 in the main emission direction 100 of the vehicle headlamp 1.
  • the main emission direction 100 in the present example in FIG. 1 runs from left to right.
  • the reflector 4 may be arranged to be pivotable and / or adjustable, which is not shown in the figures for reasons of clarity. Basically, any embodiments of the reflector 4 are possible, it can free-form variants as well as parabolas, hyperbola, ellipses or combination thereof come as a reflector surface used.
  • the reflector 4 can be seen in Fig. 1 as a cross section and can be designed as a half-shell (only the upper or lower half is available) or as a full reflector, the skilled person a number of variants for the reflector 4 is known.
  • the luminous element 3 is arranged on the optical axis 400 of the vehicle headlight 1 in a focal point of the reflector 4.
  • the reflector 4 can also be designed as an open space reflector with a plurality of different focal points, wherein according to the illustrated embodiment, the luminous element 3 is arranged precisely in one of these focal points.
  • the vehicle- Headlight 1 is closed by a cover 8.
  • the cover 8 can be made arbitrarily, but is preferably largely transparent.
  • the desired light image of the vehicle headlamp 1 is generated.
  • a support element 5 is provided - the support element 5 is here provided with cooling fins 6, which serve to derive the heat generated during the light generation in the luminous element.
  • the cooling fins 6 are only one example of heat sinks that can be used here - a number of possibilities are known to the skilled person in this regard, so will not be discussed in detail here.
  • the laser light source 2 and the luminous element 3 are arranged so that the light of the laser light source 2 is emitted counter to the main emission direction 100 of the vehicle headlight 1.
  • the beam direction 200 of the laser light source 2 thus runs opposite to the main emission direction 100 of the vehicle headlight 1. This prevents that in the event of damage to the vehicle headlight 1 or a malfunction, the light of the laser light source 2 escape and may endanger other road users.
  • the beam direction 200 of the laser light source 2 preferably extends at an acute angle 300 to the main emission direction 100 of the vehicle headlight 1 or to its optical axis 400.
  • the angle 300 can thus lie between 0 ° and 90 °.
  • An angle of 0 ° thus means that the laser light source 2 is arranged on the optical axis 400 of the vehicle headlight 1 in the main beam direction 100 behind the luminous element 3.
  • an angle 300 of 90 ° means that the beam direction 200 of the laser light source 2 is normal to the optical axis 400 of the vehicle headlight 1.
  • Optical axis 400 and main emission 100 of the vehicle headlight 1 are substantially parallel to each other. Depending on the available space for the vehicle headlight 1 or desired field of application so light source 2 and light element 3 can be arranged to each other.
  • the arrangement of the laser light source 2 with respect to the luminous element 3 can be abstracted by means of a circular cone.
  • the laser light source 2 with respect to the luminous element 3 is substantially on a conical surface of a arranged straight cone 11, wherein the tip of the circular cone is located in the light emitting element 3, the cone axis 500 is parallel to the optical axis 400 of the vehicle headlamp 1 and the generating line 12 of the cone sheath on which the laser light source 2 is disposed, parallel to the beam direction 200 of the laser light source 2 ,
  • the laser light source 2 can be arranged at any point of its associated surface line 12, ie either where the surface line intersects the base of the circular cone 11 or somewhere between this intersection and the luminous element 3.
  • the angle 300 between beam direction 200 of the laser light source 2 and the optical axis 400 of the vehicle headlamp, or between generatrix 12 and cone axis 500, represents half the opening angle of the circular cone 11. Depending on the value selected for the angle 300 so the shape of the circular cone changes.
  • a number of elements can be arranged.
  • an optical element in the form of a converging lens element 7 is arranged immediately after the laser light source 2.
  • This converging lens concentrates the light of the laser light source 2 in the direction of the luminous element 3.
  • any other optical elements can be used, for example, lenses and / or prisms of various kinds.
  • a light-guiding element 9 which is designed in the illustrated embodiment is substantially funnel-shaped or with a parabolic-conical shape and the light coming from the laser light source 2 leads to the light emitting element 3.
  • the light-guiding element 9 is designed similar to a "compound parabolic concentrator", ie it is designed to be reflective on the inside of its shell, so that light entering in combination with the funnel-like shape is brought together in the direction of the exit of the light-guiding element 9.
  • the total reflection at the Such a light-guiding element 9 allows greater tolerances with regard to the relative positioning between light source 2 and luminous element 3, for example if the light source 2 is replaced due to repair or if the laser light source 2 is no longer in the optimum position due to vibrations during operation.
  • the light-guiding element 9 can also be designed as a continuous light guide between the laser light source 2 and the light-emitting element 3, for example in tubular, conical, Cylindrical or other shape.
  • collecting lens element 7 and light guide 9 are connected via an example tubular or solid executed intermediate part, wherein collecting lens element 7, light guide 9 and intermediate part can also be made in one piece.
  • irregularities such as inclusions or microstructures can be provided which deflect the laser light or scatter, make visible from the outside and thus serve as a design element.
  • the diaphragm element 13 in FIG. 1 represents an embodiment of such elements. It prevents emission of such reflections from the vehicle headlight 1.
  • the said optics, light-guiding elements 9 and absorbing elements such as the diaphragm element 13 can also be provided with anti-reflective surfaces or designed so that they only reflect or absorb light in the wavelength range of the laser light, but translucent for visible light are executed and thus allow a look at the headlight components.
  • the diaphragm element 13 can also be embodied such that it envelops the entire free-jet region of the laser light, for example in the form of a tube with a semicircular cross-section ("half-pipe"). In a further variant, it can be embodied as half-mirrored and / or for design reasons with its own light source (eg a blue LED).
  • the invention according to the above embodiments allows the realization of a vehicle headlamp, which can meet the legal requirements such as ECE, SAE, CCC, etc.
  • Another advantage of the invention is that the heat generated during operation of the laser light source 2 waste heat can be used.
  • the laser light source 2 is arranged close to the cover plate 8 below a horizontal plane running through the optical axis 400 of the vehicle headlight 1 in the installed state of the vehicle headlight 1.
  • the horizontal plane extends in Fig. 1 normal to the plane of the drawing through the optical axis 400 of the vehicle headlight.
  • the laser light source 2 is arranged so close to the cover plate 8 that the cover 8 can be heated by means of the waste heat of the laser light source 2.
  • the waste heat can be used for defrosting and deicing the cover 8.
  • the ventilation device 16 of the laser light source 2 can be used to assist by steering the waste heat stream.
  • FIG. 1 A further advantageous variant is shown in Fig. 1, where a laser light source 2 surrounding the screen as a visual protection design aperture element 10 is provided, which is made for example of plastic.
  • the purpose of the design aperture element 10 is primarily to cover the laser light source 2, so that it is not visible from outside the vehicle headlight 1.
  • the laser light source 2 is accordingly positioned inside or below the design aperture element 10.
  • the design shutter member 10 according to the illustrated embodiment has design orifices 17 for passing the waste heat. These design apertures 17 are advantageously oriented in the direction of the cover 8 of the vehicle headlight 1 and, according to a variant, can have a nozzle-like shape, so that the air flow 18 caused by the waste heat of the laser light source 2 can be directed in a targeted manner.
  • nozzle-like shape is here to be understood a shape that allows the steering of the through the design orifices 17 passing air flow to meet the above object.
  • the defrosting and deicing, or quite generally the benefits of the waste heat of the laser light source 2 can be done even more efficient.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

The invention relates to a vehicle headlight (1) comprising at least one laser light source (2), at least one lamp element (3) that may be stimulated to emit visible light which can be irradiated by said laser light source (2), and at least one imaging optical element, for example a reflector (4) and/or a lens, wherein said laser light source (2) is arranged in front of said lamp element (3) viewed in the main beam direction (100) of the vehicle headlight (1) such that the light from said laser light source (2) radiates in the opposite direction to said main beam direction (100) of the vehicle headlight (1).

Description

FAHRZEUGSCHEINWERFER MIT LASERLICHTQUELLE  VEHICLE HEADLIGHTS WITH LASER LIGHT SOURCE
Die Erfindung betrifft einen Fahrzeugscheinwerfer mit zumindest einer Laserlichtquelle, zumindest einem zur Ausstrahlung von sichtbarem Licht anregbaren Leuchtelement, das durch die Laserlichtquelle bestrahlbar ist, und zumindest einem Abbildungsoptikelement, beispielsweise einem Reflektor und/ oder einer Linse. The invention relates to a vehicle headlamp having at least one laser light source, at least one illuminating element which can be excited to emit visible light, which can be irradiated by the laser light source, and at least one imaging optical element, for example a reflector and / or a lens.
Im Stand der Technik sind verschiedene Arten von Fahrzeugscheinwerfer bekannt, wobei in den letzten Jahren überwiegend Scheinwerfer mit Entladungslampen und Halogen- Lichtquellen verwendet wurden. Aus Energiespargründen und um den Platzbedarf von Fahrzeugscheinwerfern weiter zu verringern wird zunehmend der Einsatz von Laserlichtquellen wie Halbleiterlasern erprobt, da diese diesbezüglich von Vorteil sind. Um das Laserlicht für einen Fahrzeugscheinwerfer nutzbar zu machen wird dabei mit einer Laserlichtquelle ein Leuchtelement, ein sog. Phosphor-Konverter (z.B. eine Phosphorverbindung oder ein YAG-Kristall mit Cer-Dotierung), bestrahlt, der dadurch zur Abstrahlung von sichtbarem Licht angeregt wird. Der Phosphor-Konverter wandelt also Laserlicht in Licht anderer Wellenlängen um. Various types of vehicle headlamps are known in the prior art, with headlamps having discharge lamps and halogen light sources being used predominantly in recent years. For energy saving reasons and to further reduce the space requirement of vehicle headlamps, the use of laser light sources such as semiconductor lasers is being increasingly tested, since they are advantageous in this regard. In order to make the laser light usable for a vehicle headlamp, a light source, a so-called phosphor converter (for example, a phosphorus compound or a cerium-doped YAG crystal) is irradiated with a laser light source, which is thereby excited to emit visible light. The phosphor converter thus converts laser light into light of other wavelengths.
Beispielsweise zeigt die US 2011/0194302 AI eine derartige Lichtquelle, wo eine Laserdiode über ein Lichtleitelement von hinten auf eine fluoreszierende Substanz strahlt, die dann ihrerseits sichtbares Licht emittiert, das über einen Reflektorschirm in Fahrtrichtung gelenkt wird. Die dabei zum Einsatz kommenden Laserlichtquellen emittieren Energien bis zu 3 W in Hauptabstrahlrichtung des Scheinwerfers, im Falle einer Fehlfunktion oder Beschädigung des Scheinwerfers kann es also durch hochintensive augenschädigende Laser-Lichtstrahlung zu Verletzungen, jedenfalls aber zur Gefährdung anderer Verkehrsteilnehmer kommen. For example, US 2011/0194302 Al shows such a light source, where a laser diode radiates via a light guide from behind on a fluorescent substance, which in turn emits visible light, which is directed over a reflector screen in the direction of travel. The laser light sources used for this purpose emit energies of up to 3 W in the main emission direction of the headlamp; in the event of a malfunction or damage to the headlamp, high-intensity, eye-damaging laser light radiation can lead to injuries or endanger other road users.
Es ist daher eine Aufgabe der Erfindung, einen Fahrzeugscheinwerfer mit Laserlichtquelle bereitzustellen, der in keiner Benutzungssituation eine Gefährdung für andere Verkehrsteilnehmer darstellen kann. It is therefore an object of the invention to provide a vehicle headlamp with laser light source, which can pose a threat to other road users in any situation of use.
Diese Aufgabe wird mit einem eingangs erwähnten Fahrzeugscheinwerfer erfindungsgemäß dadurch gelöst, dass die Laserlichtquelle in Hauptabstrahlrichtung des Fahrzeugscheinwer- fers gesehen vor dem Leuchtelement angeordnet ist, so dass das Licht der Laserlichtquelle entgegen der Hauptabstrahlrichtung des Fahrzeugscheinwerfers abgestrahlt wird. This object is achieved with a vehicle headlight mentioned above according to the invention in that the laser light source in the main emission direction of the vehicle headlight Fers seen before the light-emitting element is arranged, so that the light of the laser light source is emitted against the main emission of the vehicle headlight.
Da der erfindungsgemäße Fahrzeugscheinwerfer die Laserstrahlung entgegen der Hauptstrahlrichtung ausstrahlt, kann es selbst im Falle einer Fehlfunktion oder Beschädigung des Scheinwerfers nicht zu einem Austritt der Laserstrahlung kommen. Andere Verkehrsteilnehmer werden damit nicht gefährdet, wenn der Scheinwerfer beispielsweise durch einen Unfall beschädigt wird. Je nach Anordnung von Laser lichtquelle und Leuchtelement zueinander bzw. der Anordnung des Leuchtelements im bzw. hinsichtlich des Abbildungsoptikelements (z.B. Reflektor, Linse) können verschiedene Lichtverteilungen erzeugt werden. Since the vehicle headlamp according to the invention emits the laser radiation counter to the main beam direction, even in the event of malfunction or damage to the headlamp, the laser radiation can not escape. Other road users are not endangered if the headlight is damaged, for example, by an accident. Depending on the arrangement of laser light source and luminous element to each other or the arrangement of the luminous element in or with respect to the imaging optical element (e.g., reflector, lens), different light distributions can be generated.
Die Erfindung erlaubt die Realisierung eines Fahrzeugscheinwerfers, der die gesetzlichen Bestimmungen wie beispielsweise ECE, SAE, CCC, usw. erfüllen kann. The invention allows the realization of a vehicle headlamp, which can meet the legal requirements such as ECE, SAE, CCC, etc.
Günstigerweise verläuft die Strahlrichtung der Laser lichtquelle in einem Winkel zwischen 0° und 90° zur optischen Achse des Fahrzeugscheinwerfers. Damit kann je nach verfügbarem Bauraum und Einsatzgebiet die Laserlichtquelle auf verschiedene Arten angeordnet werden. Der erfindungsgemäße Vorteil der Abstrahlung entgegen der Hauptabstrahlrichtung des Scheinwerfers und damit der Schutz anderer Verkehrsteilnehmer bei Beschädigung oder Fehlfunktion sind dadurch sichergestellt. Conveniently, the beam direction of the laser light source extends at an angle between 0 ° and 90 ° to the optical axis of the vehicle headlight. This can be arranged in various ways depending on the available space and application, the laser light source. The inventive advantage of the radiation against the main emission of the headlamp and thus the protection of other road users in case of damage or malfunction are ensured.
Die Laserlichtquelle ist in Bezug auf das Leuchtelement auf einem Kegelmantel eines geraden Kreiskegels angeordnet, wobei die Spitze des Kreiskegels im Leuchtelement liegt, die Kegelachse parallel zur optischen Achse des Fahrzeugscheinwerfers verläuft und die Mantellinie des Kegelmantels, auf der die Laserlichtquelle angeordnet ist, parallel zur Strahlrichtung der Laserlichtquelle verläuft. Die Laserlichtquelle kann also auf vielfältige Art positioniert werden, wobei sie auf ihrer Mantellinie entweder im Bereich der Kegelbasis oder aber an einer beliebigen Position zwischen Kegelspitze und dem Schnittpunkt zwischen Kegelspitze und Basisfläche angeordnet sein kann. The laser light source is arranged with respect to the luminous element on a cone shell of a straight circular cone, the tip of the circular cone lies in the luminous element, the cone axis is parallel to the optical axis of the vehicle headlight and the generatrix of the cone sheath on which the laser light source is arranged, parallel to the beam direction the laser light source runs. The laser light source can thus be positioned in a variety of ways, wherein it can be arranged on its surface line either in the region of the cone base or at any position between the apex of the cone and the point of intersection between the cone tip and the base surface.
Vorteilhafterweise ist das Leuchtelement auf der optischen Achse des Fahrzeugscheinwerfers angeordnet. In einer Variante der Erfindung ist das Leuchtelement in einem Brennpunkt des Reflektors angeordnet. Damit lässt sich eine optimale Ausnutzung des vom Leuchtelement emittierten Lichts sicherstellen bzw. eine hohe Leuchtdichte erzielen. In einer weiteren Variante der Erfindung ist zwischen der Laserlichtquelle und dem Leuchtelement zumindest ein Linsenelement, insbesondere ein Sammellinsenelement, angeordnet. Dadurch lässt sich die Einstrahlung des Laserlichts in das Leuchtelement optimieren, insbesondere hinsichtlich der Anregungsenergieverteilung im Leuchtelement. Die Energie der Laserlichtquelle kann so vorteilhaft auf bzw. in das Leuchtelement konzentriert werden. Außerdem wird durch die Konzentration des Lichts auf das Leuchtelement auch bei erschütterungsbedingten minimalen Verschiebungen des Lichtquelle durch die resultierenden Toleranzen sichergestellt, dass das Leuchtelement aufgabengemäß vom Laserlicht getroffen wird und der Scheinwerfer leuchtet. Advantageously, the luminous element is arranged on the optical axis of the vehicle headlight. In a variant of the invention, the luminous element is arranged in a focal point of the reflector. This makes it possible to ensure optimal utilization of the light emitted by the luminous element or to achieve a high luminance. In a further variant of the invention, at least one lens element, in particular a collecting lens element, is arranged between the laser light source and the luminous element. As a result, the irradiation of the laser light into the luminous element can be optimized, in particular with regard to the excitation energy distribution in the luminous element. The energy of the laser light source can be advantageously concentrated on or in the luminous element. In addition, it is ensured by the concentration of light on the light element even with shake-induced minimal shifts of the light source by the resulting tolerances that the light element is taskally made by the laser light and the headlamp lights.
Günstigerweise ist die Laserlichtquelle unterhalb einer im eingebauten Zustand des Fahrzeugscheinwerfers durch die optische Achse des Fahrzeugscheinwerfers verlaufende Horizontalebene angeordnet. Beim Betrieb von Laserlichtquellen entsteht üblicherweise viel Abwärme. In einer Variante der Erfindung weist der Fahrzeugscheinwerfer eine Abdeckscheibe auf und die Laserlichtquelle ist so nahe an der Abdeckscheibe angeordnet, dass die Abdeckscheibe mittels der Abwärme der Laserlichtquelle aufwärmbar ist. Dadurch kann die Abwärme der Laserlichtquelle dazu genutzt werden, die Abdeckscheibe des Fahrzeugscheinwerfers zu enttauen oder zu enteisen. Conveniently, the laser light source is arranged below a running in the installed state of the vehicle headlamp through the optical axis of the vehicle headlamp horizontal plane. The operation of laser light sources usually produces a lot of waste heat. In a variant of the invention, the vehicle headlight has a cover disk and the laser light source is arranged so close to the cover disk that the cover disk can be heated by means of the waste heat of the laser light source. As a result, the waste heat of the laser light source can be used to dethrone or defrost the cover of the vehicle headlight.
In einer Variante der Erfindung weist die Laserlichtquelle zumindest einen Kühlkörper und/ oder zumindest eine Lüftungsvorrichtung auf. Dadurch kann von der Laser lichtquelle während des Betriebs produzierte Wärme wirksam abgeführt werden. Der Kühlkörper besteht dabei beispielsweise aus einem wärmeleitenden Material, das an seiner Oberfläche mit zusätzlich wärmeabführenden Elementen wie beispielsweise Kühlrippen versehen sein kann. Bei der Lüftungsvorrichtung kann es sich beispielsweise um eine Ventilationsvorrichtung handeln, mit der kühle Luft an den Kühlkörper oder an die Laserlichtquelle gebracht und gleichzeitig warme Luft abgeführt werden kann. In a variant of the invention, the laser light source has at least one heat sink and / or at least one ventilation device. As a result, heat produced by the laser light source during operation can be efficiently dissipated. The heat sink consists for example of a thermally conductive material, which may be provided on its surface with additional heat dissipating elements such as cooling fins. The ventilation device may be, for example, a ventilation device with which cool air can be brought to the heat sink or to the laser light source and at the same time warm air can be removed.
Günstigerweise ist zumindest ein die Laserlichtquelle als Sichtschutz umgebendes Designblendenelement vorgesehen. Dieses Designblendenelement kann als Abdeckung oder Umhüllung der Laserlichtquelle ausgeführt sein und dient unter anderem dazu, dass die Laserlichtquelle von außen nicht sichtbar ist. Die Laserlichtquelle ist innerhalb bzw. unterhalb dieses Designblendenelements angeordnet. In einer Variante der Erfindung weist das Designblendenelement zumindest eine Designblendenöffnung auf, die bevorzugt düsenförmig ausgeführt ist. Die Düsenblendenöffnung ist günstigerweise in Richtung einer Abdeckscheibe des Fahrzeugscheinwerfers orientiert. Damit lässt sich beispielsweise wie oben beschrieben die Abwärme der Laser lichtquelle in Richtung der Abdeckscheibe lenken. Unter„düsen- förmig" ist hier eine Ausführung zu verstehen, die eine Ausrichtung des durch die Designblendenöffnung hindurchtretenden Luftstroms erlaubt. Conveniently, at least one design aperture element surrounding the laser light source as privacy screen is provided. This design aperture element can be embodied as a cover or envelope of the laser light source and serves inter alia to prevent the laser light source from being visible from the outside. The laser light source is arranged inside or below this design diaphragm element. In a variant of the invention, the design diaphragm element has at least one design diaphragm opening, which is preferably nozzle-shaped is executed. The nozzle aperture opening is favorably oriented in the direction of a cover of the vehicle headlight. Thus, for example, as described above, the waste heat of the laser light source in the direction of the cover. The term "nozzle-shaped" is to be understood here as an embodiment which permits an alignment of the air flow passing through the design aperture opening.
Grundsätzlich ist die genannte Erfindung als Freistrahlkonzept umgesetzt, die Laserlichtquelle strahlt also direkt auf das Leuchtelement. In einer Variante der Erfindung ist zwischen der Laserlichtquelle und dem Leuchtelement zumindest ein Lichtleitelement angeordnet. Das Lichtleitelement dient vor allem dazu, Abweichungen der Strahlrichtung der Laserlichtquelle von der idealen Strahlrichtung auszugleichen, sodass das Licht der Laserlichtquelle optimal in Richtung des Leuchtelements geführt (bzw. je nach Ausführung des Lichtleitelements gebündelt) wird. Dieses Lichtleitelement besteht dabei aus einem lichtleitendem Material, beispielsweise Kunststoff wie Polycarbonat (PC) oder Polymethylmethacrylat (PMMA - oder Plexiglas) oder Glas, und kann beliebig ausgeformt sein, beispielsweise röhren-, kegel- oder zylinderförmig. Auch eine Ausführung als trichterförmiges Konzentra- torelement, beispielsweise aus Glas, ist möglich, wobei ähnlich einem Leuchtstab die Totalreflexion an den Grenzflächen des Konzentratorelements ausgenutzt wird. Das Lichtleitelement kann mit Unregelmäßigkeiten beispielsweise an der Oberfläche (in Form von Mikrostrukturen) versehen sein, die das Laserlicht ablenken und so ein Leuchten des Lichtleitelements bewirken, was als Designelement verwendbar ist. Beispielsweise kann bei Verwendung einer blauen Laserlichtquelle derart ein die Augen nicht gefährdendes blaues Leuchten erzeugt werden. Basically, the said invention is implemented as a free-jet concept, the laser light source therefore radiates directly onto the luminous element. In a variant of the invention, at least one light-guiding element is arranged between the laser light source and the luminous element. The light guide serves mainly to compensate for deviations of the beam direction of the laser light source of the ideal beam direction, so that the light of the laser light source optimally guided in the direction of the light emitting element (or bundled depending on the design of the light guide). This light-guiding element consists of a light-conducting material, for example plastic such as polycarbonate (PC) or polymethyl methacrylate (PMMA or plexiglass) or glass, and can be shaped as desired, for example tubular, conical or cylindrical. A design as a funnel-shaped concen- trator element, for example made of glass, is also possible, whereby, similar to a luminous bar, the total reflection at the boundary surfaces of the concentrator element is utilized. The light-guiding element can be provided with irregularities, for example on the surface (in the form of microstructures), which deflect the laser light and thus cause the light-conducting element to shine, which can be used as a design element. For example, when using a blue laser light source such a blue eyes that do not endanger the eyes can be generated.
In einer Variante der Erfindung ist zumindest ein Blendenelement zum Abschirmen von aus dem Fahrzeugscheinwerfer austretendem Laserlicht vorgesehen. Derartige Blendenelemente können beispielsweise mit absorbierender oder lichtundurchlässiger Oberfläche ausgeführt werden bzw. mit einer Oberfläche, die das Durchtreten von Laserlicht verhindert. Beispielsweise können diese Blendenelemente in Bereichen angeordnet werden, an denen sonst durch Reflexion Laserlicht aus dem Fahrzeugscheinwerfer austreten könnte, bzw. kann das Blendenelement als den Laserstrahl (bzw. oben genannte Lichtleitelemente) umgebende Vorrichtung ausgeführt sein. Im Folgenden wird die Erfindung anhand eines nicht einschränkenden Ausführungsbeispiels, das in der Zeichnung dargestellt ist, näher erläutert. In dieser zeigt schematisch: In a variant of the invention, at least one diaphragm element is provided for shielding laser light emerging from the vehicle headlight. Such diaphragm elements can be designed, for example, with an absorbent or opaque surface or with a surface which prevents the passage of laser light. For example, these diaphragm elements can be arranged in areas where laser light could otherwise escape from the vehicle headlight by reflection, or the diaphragm element can be designed as a device surrounding the laser beam (or the above-mentioned light guide elements). In the following the invention will be explained in more detail with reference to a non-limiting embodiment, which is illustrated in the drawing. In this shows schematically:
Fig. 1 eine ausschnittsweise Querschnittdarstellung eines erfindungsgemäßen Fahrzeugscheinwerfers; und 1 is a partial cross-sectional view of a vehicle headlamp according to the invention; and
Fig. 2 eine Darstellung der möglichen relativen Anordnung von Laserlichtquelle und Leuchtelement gemäß einer Variante der Erfindung. Fig. 2 is an illustration of the possible relative arrangement of laser light source and light emitting element according to a variant of the invention.
Gleiche Elemente sind in den Figuren jeweils mit gleichen Bezugszeichen versehen. Die nachfolgend teilweise verwendeten Bezeichnungen vorne, hinten, usw. beziehen sich immer auf die Einbaulage eines Fahrzeugscheinwerfers, bzw. einen Fahrzeugscheinwerfer im eingebauten Zustand. Identical elements are provided in the figures with the same reference numerals. The following partly used designations front, rear, etc. always refer to the installation position of a vehicle headlamp or a vehicle headlamp when installed.
In Fig. 1 ist ein Fahrzeugscheinwerfer 1 in ausschnittsweiser Darstellung im Querschnitt zu sehen. Es sind nur die für das Verständnis der Erfindung wesentlichen Merkmale dargestellt, da dem Fachmann die übrigen Elemente eines Fahrzeugscheinwerfers bekannt sind. In Fig. 1, a vehicle headlight 1 is shown in a sectional view in cross section. Only the essential features for the understanding of the invention are shown, since those skilled in the other elements of a vehicle headlamp are known.
Der Fahrzeugscheinwerfer 1 umfasst eine Laserlichtquelle 2, die beispielsweise in einem Wellenlängenbereich zwischen 200 nm und 450 nm, also teilweise im nicht-sichtbaren UV- Bereich, abstrahlt. Die Leistung der Laserlichtquelle 2 liegt derzeit zwischen 0,5 und 2 W, kann aber auch höher sein. Bei der Laserlichtquelle 2 handelt es sich beispielsweise um einen Halbleiterlaser in Form einer Laserdiode oder eines VCSEL (Vertical Cavity Surface Emitting Laser). Es können auch mehrere Laserlichtquellen 2 vorgesehen sein, beispielsweise in Form von Laserdioden-Arrays. The vehicle headlight 1 comprises a laser light source 2 which emits, for example, in a wavelength range between 200 nm and 450 nm, that is to say partially in the non-visible UV range. The power of the laser light source 2 is currently between 0.5 and 2 W, but may be higher. The laser light source 2 is, for example, a semiconductor laser in the form of a laser diode or a VCSEL (Vertical Cavity Surface Emitting Laser). It is also possible to provide a plurality of laser light sources 2, for example in the form of laser diode arrays.
Die Laserlichtquelle 2 weist zum Abführen der im Betrieb entstehenden Wärme im dargestellten Ausführungsbeispiel einen Kühlkörper 15 und eine Lüftungsvorrichtung 16 auf - die Lüftungsvorrichtung 16 dient hier dazu, dem Kühlkörper 15 kühle Luft zuzuführen bzw. erwärmte Luft abzuführen. Die Lüftungsvorrichtung 16 kann beispielsweise eine Ventilationsvorrichtung umfassen. Der Kühlkörper 15 kann aus einem geeigneten Material gefertigt sein und zusätzlich beispielsweise Kühlrippen o.ä. aufweisen. Neben der Laserlichtquelle 2 (in Fig. 1 mit Kühlkörper 15 und Lüfter 16 dargestellt) ist ein Leuchtelement 3 vorgesehen, das im vorliegenden Ausführungsbeispiel kugelförmig ausgebildet ist. Die kugelförmige Ausbildung ist dabei nur eine von mehreren möglichen Ausbildungen, das Leuchtelement 3 kann auch anders ausgeführt sein. Bei dem Leuchtelement 3 handelt es sich bevorzugt um einen Phosphor-Konverter, der durch das Licht der Laserlichtquelle 2 in bekannter Weise zur Ausstrahlung von sichtbarem Licht angeregt werden kann. Als Phosphor-Konverter können im Prinzip alle Materialien verwendet werden, die monochromatisches Laserlicht in Licht anderer Wellenlängen (bevorzugt weißes Licht, das sich durch Überlagerung ergibt), umwandeln. The laser light source 2 has to dissipate the heat generated during operation in the illustrated embodiment, a heat sink 15 and a ventilation device 16 - the ventilation device 16 serves here, the cooling body 15 to supply cool air or dissipate heated air. The ventilation device 16 may for example comprise a ventilation device. The heat sink 15 may be made of a suitable material and in addition, for example, cooling fins or the like. exhibit. In addition to the laser light source 2 (shown in Fig. 1 with heat sink 15 and fan 16), a luminous element 3 is provided which is spherical in the present embodiment. The spherical design is only one of several possible configurations, the light-emitting element 3 can also be designed differently. The luminous element 3 is preferably a phosphor converter, which can be excited by the light of the laser light source 2 in a known manner for the emission of visible light. In principle, all materials which convert monochromatic laser light into light of other wavelengths (preferably white light which results from superimposition) can be used as the phosphorus converter.
Im Prinzip handelt es sich bei dem Phosphor-Konverter also um einen Lichtwandler - die Elektronen des Konvertermaterials werden durch das Laserlicht in höhere Energieniveaus angeregt und emittieren beim Zurückfallen Licht der dem Niveauunterschied entsprechenden Wellenlänge. In principle, the phosphorus converter is thus a light converter - the electrons of the converter material are excited by the laser light into higher energy levels and emit light when falling back the wavelength difference corresponding to the level difference.
Das Leuchtelement 3 ist in einem Reflektor 4 angeordnet, der das vom Leuchtelement 3 abgestrahlte Licht in Hauptabstrahlrichtung 100 des Fahrzeugscheinwerfers 1 lenkt. Die Hauptabstrahlrichtung 100 verläuft im vorliegenden Beispiel in Fig. 1 von links nach rechts. Der Reflektor 4 kann verschwenkbar und/ oder verstellbar angeordnet sein, was in den Figuren aus Gründen der Übersichtlichkeit nicht dargestellt ist. Grundsätzlich sind beliebige Ausführungen des Reflektors 4 möglich, es können Freiformvarianten genau so wie Parabeln, Hyperbeln, Ellipsen bzw. Kombination davon als Reflektorfläche zum Einsatz kommen. Der Reflektor 4 ist in Fig. 1 als Querschnitt zu erkennen und kann als Halbschale (nur die obere oder untere Hälfte ist vorhanden) oder als Vollreflektor ausgeführt sein, wobei dem Fachmann eine Reihe von Varianten für den Reflektor 4 bekannt ist. The luminous element 3 is arranged in a reflector 4, which directs the light emitted by the luminous element 3 in the main emission direction 100 of the vehicle headlamp 1. The main emission direction 100 in the present example in FIG. 1 runs from left to right. The reflector 4 may be arranged to be pivotable and / or adjustable, which is not shown in the figures for reasons of clarity. Basically, any embodiments of the reflector 4 are possible, it can free-form variants as well as parabolas, hyperbola, ellipses or combination thereof come as a reflector surface used. The reflector 4 can be seen in Fig. 1 as a cross section and can be designed as a half-shell (only the upper or lower half is available) or as a full reflector, the skilled person a number of variants for the reflector 4 is known.
In der dargestellten Variante der Erfindung ist das Leuchtelement 3 auf der optischen Achse 400 des Fahrzeugscheinwerfers 1 in einem Brennpunkt des Reflektors 4 angeordnet. Es sei darauf hingewiesen, dass der Reflektor 4 auch als Freiflächen-Reflektor mit mehreren, unterschiedlichen Brennpunkten ausgeführt sein kann, wobei gemäß dem dargestellten Ausführungsbeispiel das Leuchtelement 3 eben in einem dieser Brennpunkte angeordnet ist. Natürlich ist es nicht zwingend notwendig, dass das Leuchtelement 3 in einem Brennpunkt angeordnet ist - es muss aber zum Erreichen einer gewünschten Lichtverteilung ortsfest im Reflektor verbleiben, was auch bei Erschütterungen sichergestellt sein soll. Der Fahrzeug- Scheinwerfer 1 ist durch eine Abdeckscheibe 8 verschlossen. Die Abdeckscheibe 8 kann beliebig ausgeführt sein, ist aber bevorzugt größtenteils transparent. In the illustrated variant of the invention, the luminous element 3 is arranged on the optical axis 400 of the vehicle headlight 1 in a focal point of the reflector 4. It should be noted that the reflector 4 can also be designed as an open space reflector with a plurality of different focal points, wherein according to the illustrated embodiment, the luminous element 3 is arranged precisely in one of these focal points. Of course, it is not absolutely necessary that the luminous element 3 is arranged in a focal point - but it must remain stationary to achieve a desired light distribution in the reflector, which should be ensured even when shaken. The vehicle- Headlight 1 is closed by a cover 8. The cover 8 can be made arbitrarily, but is preferably largely transparent.
Durch Leuchtelement 3 und Reflektor 4 wird das gewünschte Lichtbild des Fahrzeugscheinwerfers 1 erzeugt. Zur Befestigung des Leuchtelements 3 im Reflektor 4 ist ein Trägerelement 5 vorgesehen - das Trägerelement 5 ist hier mit Kühlrippen 6 versehen, die zum Ableiten der bei der Lichterzeugung im Leuchtelement entstehenden Wärme dienen. Die Kühlrippen 6 sind nur ein Beispiel für Wärmeableitelemente, die hier verwendet werden können - dem Fachmann ist diesbezüglich eine Reihe von Möglichkeiten bekannt, daher wird hier nicht näher darauf eingegangen. By illuminating element 3 and reflector 4, the desired light image of the vehicle headlamp 1 is generated. For fixing the luminous element 3 in the reflector 4, a support element 5 is provided - the support element 5 is here provided with cooling fins 6, which serve to derive the heat generated during the light generation in the luminous element. The cooling fins 6 are only one example of heat sinks that can be used here - a number of possibilities are known to the skilled person in this regard, so will not be discussed in detail here.
Erfindungsgemäß sind Laserlichtquelle 2 und Leuchtelement 3 so angeordnet, dass das Licht der Laserlichtquelle 2 entgegen der Hauptabstrahlrichtung 100 des Fahrzeugscheinwerfers 1 ausgestrahlt wird. Die Strahlrichtung 200 der Laserlichtquelle 2 verläuft also entgegengesetzt zur Hauptabstrahlrichtung 100 des Fahrzeugscheinwerfers 1. Dadurch wird verhindert, dass im Fall einer Beschädigung des Fahrzeugscheinwerfers 1 oder einer Fehlfunktion das Licht der Laserlichtquelle 2 entweichen und zur Gefährdung anderer Verkehrsteilnehmer führen kann. According to the invention, the laser light source 2 and the luminous element 3 are arranged so that the light of the laser light source 2 is emitted counter to the main emission direction 100 of the vehicle headlight 1. The beam direction 200 of the laser light source 2 thus runs opposite to the main emission direction 100 of the vehicle headlight 1. This prevents that in the event of damage to the vehicle headlight 1 or a malfunction, the light of the laser light source 2 escape and may endanger other road users.
Die Strahlrichtung 200 der Laserlichtquelle 2 verläuft bevorzugt in einem spitzen Winkel 300 zur Hauptabstrahlrichtung 100 des Fahrzeugscheinwerfers 1 bzw. zu dessen optischer Achse 400. Der Winkel 300 kann also zwischen 0° und 90° liegen. Ein Winkel von 0° bedeutet also, dass die Laserlichtquelle 2 auf der optischen Achse 400 des Fahrzeugscheinwerfers 1 in Hauptstrahlrichtung 100 gesehen hinter dem Leuchtelement 3 angeordnet ist. Entsprechend bedeutet ein Winkel 300 von 90°, dass die Strahlrichtung 200 der Laserlichtquelle 2 normal zur optischen Achse 400 des Fahrzeugscheinwerfers 1 verläuft. Optische Achse 400 und Hauptabstrahlrichtung 100 des Fahrzeugscheinwerfers 1 verlaufen im Wesentlichen parallel zueinander. Je nach verfügbarem Bauraum für den Fahrzeugscheinwerfer 1 bzw. gewünschtem Einsatzgebiet können also Lichtquelle 2 und Leuchtelement 3 zueinander angeordnet werden. The beam direction 200 of the laser light source 2 preferably extends at an acute angle 300 to the main emission direction 100 of the vehicle headlight 1 or to its optical axis 400. The angle 300 can thus lie between 0 ° and 90 °. An angle of 0 ° thus means that the laser light source 2 is arranged on the optical axis 400 of the vehicle headlight 1 in the main beam direction 100 behind the luminous element 3. Accordingly, an angle 300 of 90 ° means that the beam direction 200 of the laser light source 2 is normal to the optical axis 400 of the vehicle headlight 1. Optical axis 400 and main emission 100 of the vehicle headlight 1 are substantially parallel to each other. Depending on the available space for the vehicle headlight 1 or desired field of application so light source 2 and light element 3 can be arranged to each other.
Im Wesentlichen lässt sich die Anordnung der Laserlichtquelle 2 hinsichtlich des Leuchtelements 3 anhand eines Kreiskegels abstrahieren. Wie in Fig. 2 zu erkennen ist, ist die Laserlichtquelle 2 in Bezug auf das Leuchtelement 3 im Wesentlichen auf einem Kegelmantel eines geraden Kreiskegels 11 angeordnet, wobei die Spitze des Kreiskegels im Leuchtelement 3 liegt, die Kegelachse 500 parallel zur optischen Achse 400 des Fahrzeugscheinwerfers 1 verläuft und die Mantellinie 12 des Kegelmantels, auf der die Laserlichtquelle 2 angeordnet ist, parallel zur Strahlrichtung 200 der Laserlichtquelle 2 verläuft. Im Prinzip kann die Laserlichtquelle 2 an einem beliebigen Punkt der ihr zugeordneten Mantellinie 12 angeordnet sein, also entweder dort, wo die Mantellinie die Basis- bzw. Grundfläche des Kreiskegels 11 schneidet oder irgendwo zwischen diesem Schnittpunkt und dem Leuchtelement 3. Der Winkel 300 zwischen Strahlrichtung 200 der Laserlichtquelle 2 und der optischen Achse 400 des Fahrzeugscheinwerfers, bzw. zwischen Mantellinie 12 und Kegelachse 500, stellt den halben Öffnungswinkel des Kreiskegels 11 dar. Je nach dem für den Winkel 300 gewählten Wert verändert sich also die Form des Kreiskegels. In essence, the arrangement of the laser light source 2 with respect to the luminous element 3 can be abstracted by means of a circular cone. As can be seen in Fig. 2, the laser light source 2 with respect to the luminous element 3 is substantially on a conical surface of a arranged straight cone 11, wherein the tip of the circular cone is located in the light emitting element 3, the cone axis 500 is parallel to the optical axis 400 of the vehicle headlamp 1 and the generating line 12 of the cone sheath on which the laser light source 2 is disposed, parallel to the beam direction 200 of the laser light source 2 , In principle, the laser light source 2 can be arranged at any point of its associated surface line 12, ie either where the surface line intersects the base of the circular cone 11 or somewhere between this intersection and the luminous element 3. The angle 300 between beam direction 200 of the laser light source 2 and the optical axis 400 of the vehicle headlamp, or between generatrix 12 and cone axis 500, represents half the opening angle of the circular cone 11. Depending on the value selected for the angle 300 so the shape of the circular cone changes.
Zwischen der Laserlichtquelle 2 und dem Leuchtelement 3 kann eine Reihe von Elementen angeordnet sein. Beispielsweise ist im dargestellten Ausführungsbeispiel gemäß Fig. 1 unmittelbar nach der Laserlichtquelle 2 ein Optikelement in Form eines Sammellinsenelements 7 angeordnet. Diese Sammellinse konzentriert das Licht der Laserlichtquelle 2 in Richtung des Leuchtelements 3. Natürlich können auch beliebige andere Optikelemente zum Einsatz kommen, beispielsweise Linsen und/ oder Prismen verschiedenster Art. Between the laser light source 2 and the luminous element 3, a number of elements can be arranged. For example, in the illustrated embodiment of FIG. 1 immediately after the laser light source 2, an optical element in the form of a converging lens element 7 is arranged. This converging lens concentrates the light of the laser light source 2 in the direction of the luminous element 3. Of course, any other optical elements can be used, for example, lenses and / or prisms of various kinds.
Unmittelbar vor dem Leuchtelement 3, bzw. das Leuchtelement 3 haltend ist ein Lichtleitelement 9 vorgesehen, das im dargestellten Ausführungsbeispiel im Wesentlichen trichterförmig bzw. mit einer parabolisch-konischen Form ausgeführt ist und das von der Laserlichtquelle 2 kommende Licht zum Leuchtelement 3 führt. Das Lichtleitelement 9 ist ähnlich einem„Compound Parabolic Concentrator" ausgeführt, ist also auf der Innenseite seiner Hülle reflektierend ausgeführt, so dass in Kombination mit der trichterartigen Form eintretendes Licht in Richtung des Ausgangs des Lichtleitelements 9 zusammengeführt wird. Dabei wird insbesondere die Totalreflexion an den Begrenzungsflächen des Lichtleitelements 9 ausgenutzt. Ein derartiges Lichtleitelement 9 ermöglicht größere Toleranzen hinsichtlich der relativen Positionierung zwischen Lichtquelle 2 und Leuchtelement 3, beispielsweise wenn die Lichtquelle 2 reparaturbedingt ausgetauscht wird oder wenn sich die Laserlichtquelle 2 durch Erschütterungen im Betrieb nicht mehr in der Optimalposition befindet. Immediately in front of the luminous element 3, or the luminous element 3 holding a light-guiding element 9 is provided, which is designed in the illustrated embodiment is substantially funnel-shaped or with a parabolic-conical shape and the light coming from the laser light source 2 leads to the light emitting element 3. The light-guiding element 9 is designed similar to a "compound parabolic concentrator", ie it is designed to be reflective on the inside of its shell, so that light entering in combination with the funnel-like shape is brought together in the direction of the exit of the light-guiding element 9. In particular, the total reflection at the Such a light-guiding element 9 allows greater tolerances with regard to the relative positioning between light source 2 and luminous element 3, for example if the light source 2 is replaced due to repair or if the laser light source 2 is no longer in the optimum position due to vibrations during operation.
Das Lichtleitelement 9 kann aber auch als durchgehender Lichtleiter zwischen der Laserlichtquelle 2 und dem Leuchtelement 3 ausgeführt sein, beispielsweise in Röhren-, Kegel-, Zylinder- oder anderer Form. In einer Variante, die in den Figuren nicht dargestellt ist, sind Sammellinsenelement 7 und Lichtleitelement 9 über ein beispielsweise röhrenförmig oder massiv ausgeführtes Zwischenteil verbunden, wobei Sammellinsenelement 7, Lichtleitelement 9 und Zwischenteil auch einstückig ausgeführt sein können. Dabei können auch Unregelmäßigkeiten wie Einschlüsse oder Mikrostrukturen vorgesehen werden, die das Laserlicht ablenken bzw. streuen, von außen sichtbar machen und so als Designelement dienen. However, the light-guiding element 9 can also be designed as a continuous light guide between the laser light source 2 and the light-emitting element 3, for example in tubular, conical, Cylindrical or other shape. In a variant, which is not shown in the figures, collecting lens element 7 and light guide 9 are connected via an example tubular or solid executed intermediate part, wherein collecting lens element 7, light guide 9 and intermediate part can also be made in one piece. In this case, irregularities such as inclusions or microstructures can be provided which deflect the laser light or scatter, make visible from the outside and thus serve as a design element.
Günstigerweise sind rund um derartige Optik- oder Lichtleitelemente 9 absorbierende Elemente angeordnet , um eventuelle Reflexionen des eintretenden Laserlichts in Hauptabstrahlrichtung 100 des Fahrzeugscheinwerfers 1 und damit Gefährdung anderer Verkehrsteilnehmer zu verhindern. Das Blendenelement 13 in Fig. 1 stellt eine Ausführungsform derartiger Elemente dar. Es verhindert eine Abstrahlung derartiger Reflexionen aus dem Fahrzeugscheinwerfer 1 heraus. In einer Variante bzw. zusätzlich können die besagten Optik-, Lichtleitelemente 9 und absorbierenden Elemente wie das Blendenelement 13 auch mit entspiegelten Oberflächen versehen bzw. so ausgeführt sein, dass sie nur Licht im Wellenlängenbereich des Laserlichts reflektieren bzw. absorbieren, allerdings für sichtbares Licht durchscheinend ausgeführt sind und damit einen Blick auf die Scheinwerferkomponenten erlauben. Beispielhaft ist das Blendenelement 13 in Fig. 1 oberhalb einer durch die optische Achse 400 des Fahrzeugscheinwerfers 1 verlaufende Horizontalebene zwischen dem Lichtleitelement 9 und der Abdeckscheibe 8 angeordnet. Natürlich sind aber auch andere, dem Fachmann bekannte Lösungen möglich - die einzige Voraussetzung derartiger Vorrichtungen ist, dass die Lichtfunktionen des Fahrzeugscheinwerfers 1 nicht nachteilig beeinflusst werden. Conveniently 9 absorbing elements are arranged around such optical or light-guiding elements to prevent any reflections of the incoming laser light in the main emission 100 of the vehicle headlight 1 and thus endanger other road users. The diaphragm element 13 in FIG. 1 represents an embodiment of such elements. It prevents emission of such reflections from the vehicle headlight 1. In a variant or in addition, the said optics, light-guiding elements 9 and absorbing elements such as the diaphragm element 13 can also be provided with anti-reflective surfaces or designed so that they only reflect or absorb light in the wavelength range of the laser light, but translucent for visible light are executed and thus allow a look at the headlight components. By way of example, the diaphragm element 13 in FIG. 1 is arranged above a horizontal plane extending through the optical axis 400 of the vehicle headlight 1 between the light guide element 9 and the cover plate 8. Of course, however, other known to those skilled solutions - the only requirement of such devices is that the light functions of the vehicle headlight 1 are not adversely affected.
Das Blendenelement 13 kann auch so ausgeführt sein, dass es den gesamten Freistrahlbereich des Laserlichts umhüllt, beispielsweise in Form einer Röhre mit halbkreisförmigen Querschnitt („Halfpipe"). In einer weiteren Variante kann es halbverspiegelt ausgeführt sein und/oder aus Designgründen mit einer eigenen Lichtquelle (z.B. einer blauen LED) beleuchtet werden. The diaphragm element 13 can also be embodied such that it envelops the entire free-jet region of the laser light, for example in the form of a tube with a semicircular cross-section ("half-pipe"). In a further variant, it can be embodied as half-mirrored and / or for design reasons with its own light source (eg a blue LED).
Die Erfindung gemäß den obigen Ausführungen erlaubt die Realisierung eines Fahrzeugscheinwerfers, der die gesetzlichen Bestimmungen wie beispielsweise ECE, SAE, CCC, usw. erfüllen kann. Ein weiterer Vorteil der Erfindung liegt darin, dass die beim Betrieb der Laserlichtquelle 2 entstehende Abwärme genutzt werden kann. Im Ausführungsbeispiel gemäß Fig. 1 ist die Laserlichtquelle 2 unterhalb einer im eingebauten Zustand des Fahrzeugscheinwerfers 1 durch die optische Achse 400 des Fahrzeugscheinwerfers 1 verlaufende Horizontalebene nahe an der Abdeckscheibe 8 angeordnet. Die Horizontalebene verläuft in Fig. 1 normal auf die Zeichenebene durch die optische Achse 400 des Fahrzeugscheinwerfers. The invention according to the above embodiments allows the realization of a vehicle headlamp, which can meet the legal requirements such as ECE, SAE, CCC, etc. Another advantage of the invention is that the heat generated during operation of the laser light source 2 waste heat can be used. In the exemplary embodiment according to FIG. 1, the laser light source 2 is arranged close to the cover plate 8 below a horizontal plane running through the optical axis 400 of the vehicle headlight 1 in the installed state of the vehicle headlight 1. The horizontal plane extends in Fig. 1 normal to the plane of the drawing through the optical axis 400 of the vehicle headlight.
Die Laserlichtquelle 2 ist so nahe an der Abdeckscheibe 8 angeordnet, dass die Abdeckscheibe 8 mittels der Abwärme der Laserlichtquelle 2 aufwärmbar ist. Die Abwärme kann zum Enttauen und Enteisen der Abdeckscheibe 8 verwendet werden. Je nach verwendeter Laserlichtquelle 2 bzw. je nach Material der Abdeckscheibe 8 etc. ist zu entscheiden, wie nahe die Laserlichtquelle 2 zur Abdeckscheibe 8 positioniert werden muss. Die Lüftungsvorrichtung 16 der Laser lichtquelle 2 kann hier durch Lenkung des Abwärmestroms unterstützend verwendet werden. The laser light source 2 is arranged so close to the cover plate 8 that the cover 8 can be heated by means of the waste heat of the laser light source 2. The waste heat can be used for defrosting and deicing the cover 8. Depending on the used laser light source 2 or depending on the material of the cover 8, etc., it has to be decided how close the laser light source 2 to the cover 8 has to be positioned. The ventilation device 16 of the laser light source 2 can be used to assist by steering the waste heat stream.
Eine weitere vorteilhafte Variante ist in Fig. 1 dargestellt, wo ein die Laserlichtquelle 2 als Sichtschutz umgebendes Designblendenelement 10 vorgesehen ist, das beispielsweise aus Kunststoff gefertigt ist. Zweck des Designblendenelements 10 ist in erster Linie ein Bedecken der Laserlichtquelle 2, sodass sie von außerhalb des Fahrzeugscheinwerfers 1 nicht sichtbar ist. Die Laserlichtquelle 2 ist dementsprechend innerhalb bzw. unterhalb des Designblendenelements 10 positioniert. Das Designblendenelement 10 gemäß der dargestellten Ausführungsform weist Designblendenöffnungen 17 zum Durchtritt der Abwärme auf. Diese Designblendenöffnungen 17 sind vorteilhaft in Richtung der Abdeckscheibe 8 des Fahrzeugscheinwerfers 1 orientiert und können gemäß einer Variante eine düsenförmige Gestalt haben, sodass der durch die Abwärme der Laserlichtquelle 2 bewirkte Luftstrom 18 gezielt gelenkt werden kann. Unter düsenförmiger Gestalt ist hier eine Form zu verstehen, die das Lenken des durch die Designblendenöffnungen 17 durchtretenden Luftstroms erlaubt, um die oben genannte Aufgabe zu erfüllen. So kann das Enttauen und Enteisen, bzw. ganz allgemein das Nutzen der Abwärme der Laserlichtquelle 2 noch effizienter erfolgen. A further advantageous variant is shown in Fig. 1, where a laser light source 2 surrounding the screen as a visual protection design aperture element 10 is provided, which is made for example of plastic. The purpose of the design aperture element 10 is primarily to cover the laser light source 2, so that it is not visible from outside the vehicle headlight 1. The laser light source 2 is accordingly positioned inside or below the design aperture element 10. The design shutter member 10 according to the illustrated embodiment has design orifices 17 for passing the waste heat. These design apertures 17 are advantageously oriented in the direction of the cover 8 of the vehicle headlight 1 and, according to a variant, can have a nozzle-like shape, so that the air flow 18 caused by the waste heat of the laser light source 2 can be directed in a targeted manner. By nozzle-like shape is here to be understood a shape that allows the steering of the through the design orifices 17 passing air flow to meet the above object. Thus, the defrosting and deicing, or quite generally the benefits of the waste heat of the laser light source 2 can be done even more efficient.

Claims

ANSPRÜCHE
1. Fahrzeugscheinwerfer (1) mit zumindest einer Laser lichtquelle (2), zumindest einem zur Ausstrahlung von sichtbarem Licht anregbaren Leuchtelement (3), das durch die Laserlichtquelle (2) bestrahlbar ist, und zumindest einem Abbildungsoptikelement, beispielsweise einem Reflektor (4) und/ oder einer Linse, dadurch gekennzeichnet, dass die Laserlichtquelle (2) in Hauptabstrahlrichtung (100) des Fahrzeugscheinwerfers (1) gesehen vor dem Leuchtelement (3) angeordnet ist, so dass das Licht der Laserlichtquelle (2) entgegen der Hauptabstrahlrichtung (100) des Fahrzeugscheinwerfers (1) ausgestrahlt wird. 1. A vehicle headlight (1) with at least one laser light source (2), at least one stimulable to the emission of visible light luminous element (3) which is irradiated by the laser light source (2), and at least one imaging optical element, such as a reflector (4) and / or a lens, characterized in that the laser light source (2) in the main emission direction (100) of the vehicle headlamp (1) is arranged in front of the luminous element (3), so that the light from the laser light source (2) opposes the main emission direction (100) of the Vehicle headlight (1) is broadcast.
2. Fahrzeugscheinwerfer (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Strahlrichtung (200) der Laserlichtquelle (2) in einem Winkel (300) zwischen 0° und 90° zur optischen Achse (400) des Fahrzeugscheinwerfers (1) verläuft. 2. Vehicle headlight (1) according to claim 1, characterized in that the beam direction (200) of the laser light source (2) at an angle (300) between 0 ° and 90 ° to the optical axis (400) of the vehicle headlamp (1).
3. Fahrzeugscheinwerfer (1) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Laserlichtquelle (2) in Bezug auf das Leuchtelement (3) auf einem Kegelmantel eines geraden Kreiskegels (11) angeordnet ist, wobei die Spitze des Kreiskegels (11) im Leuchtelement (3) liegt, die Kegelachse (500) parallel zur optischen Achse (400) des Fahrzeugscheinwerfers (1) verläuft und die Mantellinie (12) des Kegelmantels, auf der die Laserlichtquelle (2) angeordnet ist, parallel zur Strahlrichtung (200) der Laserlichtquelle (2) verläuft. 3. Vehicle headlight (1) according to claim 1 or 2, characterized in that the laser light source (2) with respect to the luminous element (3) on a conical surface of a straight circular cone (11) is arranged, wherein the tip of the circular cone (11) in Luminous element (3) is located, the cone axis (500) parallel to the optical axis (400) of the vehicle headlamp (1) and the generating line (12) of the conical surface on which the laser light source (2) is arranged parallel to the beam direction (200) Laser light source (2) runs.
4. Fahrzeugscheinwerfer (1) nach Anspruch 3, dadurch gekennzeichnet, dass das Leuchtelement (3) auf der optischen Achse (400) des Fahrzeugscheinwerfers (1) angeordnet ist. 4. Vehicle headlight (1) according to claim 3, characterized in that the luminous element (3) on the optical axis (400) of the vehicle headlamp (1) is arranged.
5. Fahrzeugscheinwerfer (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Leuchtelement (3) in einem Brennpunkt des Reflektors (4) angeordnet ist. 5. Vehicle headlight (1) according to one of the preceding claims, characterized in that the luminous element (3) is arranged in a focal point of the reflector (4).
6. Fahrzeugscheinwerfer (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zwischen der Laserlichtquelle (2) und dem Leuchtelement (3) zumindest ein Optikelement, insbesondere ein Sammellinsenelement (7), angeordnet ist. 6. Vehicle headlight (1) according to one of the preceding claims, characterized in that between the laser light source (2) and the luminous element (3) at least one optical element, in particular a collecting lens element (7) is arranged.
7. Fahrzeugscheinwerfer (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Laserlichtquelle (2) unterhalb einer im eingebauten Zustand des Fahrzeugscheinwerfers (1) durch die optische Achse (400) des Fahrzeugscheinwerfers (1) verlaufenden Horizontalebene angeordnet ist. 7. Vehicle headlight (1) according to one of the preceding claims, characterized in that the laser light source (2) below a in the installed state of the vehicle headlamp (1) through the optical axis (400) of the vehicle headlamp (1) extending horizontal plane is arranged.
8. Fahrzeugscheinwerfer (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Fahrzeugscheinwerfer (1) eine Abdeckscheibe (8) aufweist und die Laserlichtquelle (2) so nahe an der Abdeckscheibe (8) angeordnet ist, dass die Abdeckscheibe (8) mittels der Abwärme der Laserlichtquelle (2) aufwärmbar ist. 8. A vehicle headlight (1) according to any one of the preceding claims, characterized in that the vehicle headlight (1) has a cover (8) and the laser light source (2) is arranged so close to the cover (8) that the cover (8) by means of the waste heat of the laser light source (2) can be heated.
9. Fahrzeugscheinwerfer (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Laser lichtquelle (2) zumindest einen Kühlkörper (15) und/ oder zumindest eine Lüftungs Vorrichtung (16) aufweist. 9. Vehicle headlight (1) according to one of the preceding claims, characterized in that the laser light source (2) has at least one heat sink (15) and / or at least one ventilation device (16).
10. Fahrzeugscheinwerfer (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zumindest ein die Laserlichtquelle (2) als Sichtschutz umgebendes Designblendenelement (10) vorgesehen ist. 10. Vehicle headlight (1) according to one of the preceding claims, characterized in that at least one laser light source (2) surrounding the screen as a visual protection design aperture element (10) is provided.
11. Fahrzeugscheinwerfer (1) nach Anspruch 10, dadurch gekennzeichnet, dass das Designblendenelement (10) zumindest eine Designblendenöffnung (17) aufweist, die bevorzugt düsenförmig ausgeführt ist. 11. Vehicle headlamp (1) according to claim 10, characterized in that the design diaphragm element (10) has at least one design aperture (17), which is preferably designed nozzle-shaped.
12. Fahrzeugscheinwerfer (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zwischen der Laserlichtquelle (2) und dem Leuchtelement (3) zumindest ein Lichtleitelement (9) angeordnet ist. 12. Vehicle headlight (1) according to one of the preceding claims, characterized in that between the laser light source (2) and the luminous element (3) at least one light-guiding element (9) is arranged.
13. Fahrzeugscheinwerfer (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zumindest ein Blendenelement (13) zum Abschirmen von aus dem Fahrzeugscheinwerfer (1) austretendem Laserlicht vorgesehen ist. 13. Vehicle headlight (1) according to one of the preceding claims, characterized in that at least one aperture element (13) for shielding from the vehicle headlight (1) exiting laser light is provided.
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AT512591B1 (en) 2014-06-15
EP2745042B1 (en) 2016-02-24
US20140321148A1 (en) 2014-10-30
JP2015502628A (en) 2015-01-22
JP2016028397A (en) 2016-02-25
BR112014010269A2 (en) 2017-04-18
IN2014MN01171A (en) 2015-07-03
MX2014007019A (en) 2014-07-22
AT512591A1 (en) 2013-09-15
JP6103446B2 (en) 2017-03-29
CN104160208A (en) 2014-11-19
US9611994B2 (en) 2017-04-04
JP6176463B2 (en) 2017-08-09
WO2013134804A1 (en) 2013-09-19
CN104160208B (en) 2017-03-08

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