• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a vehicle headlight (1) having at least one laser light source (2), at least one illuminating element (3) which can be excited by the laser light source (2) and at least one imaging optical element, for example a reflector (4). and / or a lens, the laser light source (2) being arranged in the main emission direction (100) of the vehicle headlamp (1) in front of the luminous element (3), so that the light of the laser light source (2) is opposite to the main emission direction (100) of the vehicle headlamp ( 1), wherein the laser light source (2) with respect to the luminous element (3) on a conical surface of a straight circular cone (11) is arranged, the tip of the circular cone (11) in the luminous element (3) Hegt, 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, paral Lel to the beam direction (200) of the laser light source (2) extends.
    公开号:AT512591A1
    申请号:T50070/2012
    申请日:2012-03-12
    公开日:2013-09-15
    发明作者:Friedrich Bauer；Andreas Moser；Johann Altmann；Erich Kaufmann
    申请人:Zizala Lichtsysteme Gmbh；
    IPC主号:
    专利说明:

    P12415
    Vehicle headlight with laser light source
    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.
    Various types of vehicle headlights are known in the prior art, with headlamps with discharge lamps and halogen light sources being used in recent years predominantly. 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.
    For example, US 2011/0194302 A1 shows such a light source, where a laser diode radiates from behind on a fluorescent substance via a light guide element, which in turn emits visible light which is directed in the direction of travel via a reflector screen. 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.
    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.
    This object is achieved with an aforementioned vehicle headlamp according to the invention that the laser light source in the main direction of the Fahrzeugscheinwer- -2- PI2415 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 headlamp.
    Since the vehicle headlight according to the invention radiates the laser radiation counter to the main beam direction, even in the event of a 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 (for example, reflector, lens), different light distributions can be generated.
    The invention allows the realization of a vehicle headlamp, which can meet the legal requirements such as ECE, SAE, CCC, etc. 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.
    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.
    Advantageously, the luminous element is arranged on the optical axis of the vehicle headlight. In a variant of the invention, the light-emitting 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. -3- P12415
    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. This makes it possible to optimize the irradiation of the laser light into the luminous element, 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 headlamps lit. 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 a variant of the invention, the laser light source has at least one heat sink and / or at least one ventilation device. Thereby, 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. 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 aperture element. In one variant of the invention, the design aperture element has at least one design aperture opening, which is preferred nozzle-shaped -4- P12415 is executed. The Düsenblendenöflhung is conveniently 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 can be directed in the direction of the cover disk. Under "nozzle-shaped " Here, an embodiment is to be understood that allows an alignment of the air passing through the design aperture opening air stream.
    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-guiding element serves primarily to compensate deviations of the beam direction of the laser light source from the ideal beam direction, so that the light from the laser light source optimally leads in the direction of the luminous element (or, depending on the light source) Embodiment of the light guide bundled) is. This light-conducting element consists of a light-conducting material, for example plastic such as polycarbonate (PQ or polymethyl methacrylate (PMMA or Plexiglas) or glass, and can be shaped as desired, for example tubular, conical or cylindrical Glass, is possible, whereby the total reflection at the interfaces of the concentrator element is exploited similarly to a luminous rod 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 By way of example, when using a blue laser light source, such a blue glow that does not endanger the eyes can be generated.
    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 on the basis of a non-restrictive embodiment, which is illustrated in the drawing. In this shows schematically:
    1 is a partial cross-sectional view of a erfindungsgeinäßen vehicle headlight. and
    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.
    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, 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 2W, 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 comprise, for example, 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. -6- P12415
    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.
    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.
    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 provided in the figures for reasons of clarity is not. 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 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 with shocks. The vehicle -7- P12415 headlight 1 is closed by a cover 8. The cover 8 can be made arbitrarily, but is preferably largely transparent.
    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.
    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.
    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.
    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 P12415
    8 arranged with the tip of the circular cone in the luminous element 3, the cone axis 500 is parallel to the optical axis 400 of the vehicle headlamp 1 and the surface line 12 of the cone sheath on which the laser light source 2 is arranged, parallel to the beam direction 200 of 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 or base of the circular cone 11 or somewhere between this intersection and the light element 3. The angle 300 between the beam direction 200 of the laser light source 2 and the optical axis 400 of the vehicle headlight, or between generatrix 12 and cone axis 500, represents half the opening angle of the circular cone 11. Thus, depending on the value chosen for the angle 300, the shape of the circular cone changes.
    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.
    Immediately in front of the luminous element 3, or the luminous element 3 holding a Uchtleit element 9 is provided, which is executed 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 luminous element 3. The light guide 9 is similar to a "Compound Parabolic Concentrator". executed, is thus designed to be reflective on the inside of its shell, so that in combination with the funnel-like shape incoming light is brought together in the direction of the output of the light-guiding element 9. Such a lichtieitelement 9 allows greater tolerances with respect to the relative positioning between the light source 2 and the light element 3, for example, when the light source 2 is replaced due to repair or if the laser light source 2 by vibrations during operation is no longer is in the optimal position.
    The Lichtieitelement 9 can also be designed as a continuous light guide between the laser light source 2 and the luminous element 3, for example in tube, cone, P12415
    Cylindrical or other shape. In one variant, which is not shown in the figures, converging lens element 7 and light guide element 9 are connected via an intermediate part, for example tubular or solid, whereby converging lens element 7, Uchtleitele element 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. 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 beam direction 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.
    The diaphragm element 13 can also be embodied such that it covers the entire free-jet region of the laser light, for example in the form of a tube with a semicircular cross section ("halfpipe"). 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. -10- PI 2415
    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.
    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 here by supporting the waste heat flow supportive.
    A further advantageous variant is shown in FIG. 1, where a design aperture element 10 surrounding the laser light source 2 as a privacy screen is provided which is made of plastic, for example. 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 apertures 17 for the passage of 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.
    Vienna, March 12, 2012
    权利要求:
    Claims (13)
    [1]
    1. A vehicle headlamp (1) with at least one laser light source (2), at least one illuminating element (3) which can be excited by visible light and which can be irradiated by the laser light source (2), and at least one An imaging optical element, for example a reflector (4) and / or a lens, characterized in that the laser light source (2) in Hauptabstrahliichtung (100) of the vehicle headlamp (1) seen in front of the luminous element (3) is arranged, so that the light of the laser light source ( 2) is emitted against the Hauptabstrahliichtung (100) of the vehicle headlamp (1).
    [2]
    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]
    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 (5) is arranged wherein the tip of the circular cone (5) in the luminous element (3), the cone axis (500) parallel to the optical axis (400) of the vehicle headlamp (1) and the surface line (6) of the conical surface on which the laser light source (2) is arranged, parallel to the beam direction (200) of the laser light source (2) runs.
    [4]
    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]
    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]
    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. -12- P12415
    [7]
    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]
    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]
    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]
    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]
    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]
    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]
    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. Vienna, March 12, 2012
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    同族专利:
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    FR3048065B1|2016-02-23|2019-11-29|Valeo Vision|LIGHT-EMITTING LIGHT MODULE AND DEVICE FOR MOTOR VEHICLE|
    FR3051889B1|2016-05-31|2020-03-06|Valeo Vision|LIGHTING AND / OR SIGNALING DEVICE FOR A MOTOR VEHICLE EQUIPPED WITH A COOLED LIGHT MODULE USING AN AIRFLOW GENERATOR|
    KR101781033B1|2016-06-14|2017-09-25|엘지전자 주식회사|Lighting device for vehicle|
    US10145527B2|2016-10-13|2018-12-04|National Taiwan University Of Science And Technology|Laser car lamp and night vision system using the same|
    TWI611135B|2016-10-13|2018-01-11|國立臺灣科技大學|Laser car lamp|
    KR101885138B1|2016-12-14|2018-08-03|코멤텍|Air permeable cap|
    EP3473918B1|2017-10-19|2021-12-01|ZKW Group GmbH|Lighting device for a motor vehicle headlight|
    DE102018201980A1|2018-02-08|2019-08-08|Bayerische Motoren Werke Aktiengesellschaft|Lighting device for a motor vehicle|
    法律状态:
    2016-11-15| HC| Change of the firm name or firm address|Owner name: ZKW GROUP GMBH, AT Effective date: 20161014 |
    2018-11-15| MM01| Lapse because of not paying annual fees|Effective date: 20180312 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50070/2012A|AT512591B1|2012-03-12|2012-03-12|Vehicle headlight with laser light source|ATA50070/2012A| AT512591B1|2012-03-12|2012-03-12|Vehicle headlight with laser light source|
    MX2014007019A| MX2014007019A|2012-03-12|2013-02-28|Vehicle headlight with laser light source.|
    CN201380003563.XA| CN104160208B|2012-03-12|2013-02-28|Vehicle head lamp with LASER Light Source|
    US14/353,309| US9611994B2|2012-03-12|2013-02-28|Vehicle headlight with laser light source|
    PCT/AT2013/050051| WO2013134804A1|2012-03-12|2013-02-28|Vehicle headlight with laser light source|
    EP13714533.0A| EP2745042B1|2012-03-12|2013-02-28|Vehicle headlight with laser light source|
    IN1171MUN2014| IN2014MN01171A|2012-03-12|2013-02-28|
    JP2014536063A| JP6103446B2|2012-03-12|2013-02-28|Vehicle headlight with laser light source|
    BR112014010269A| BR112014010269A2|2012-03-12|2013-02-28|vehicle headlight with laser light source|
    JP2015209269A| JP6176463B2|2012-03-12|2015-10-23|Vehicle headlight with laser light source|
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