EP3014171B1 - Phare de véhicule - Google Patents

Phare de véhicule Download PDF

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Publication number
EP3014171B1
EP3014171B1 EP14738353.3A EP14738353A EP3014171B1 EP 3014171 B1 EP3014171 B1 EP 3014171B1 EP 14738353 A EP14738353 A EP 14738353A EP 3014171 B1 EP3014171 B1 EP 3014171B1
Authority
EP
European Patent Office
Prior art keywords
light
unit
laser
light sources
lighting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP14738353.3A
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German (de)
English (en)
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EP3014171A1 (fr
Inventor
Markus REINPRECHT
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
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ZKW Group GmbH
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Filing date
Publication date
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Publication of EP3014171A1 publication Critical patent/EP3014171A1/fr
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Publication of EP3014171B1 publication Critical patent/EP3014171B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • 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]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • F21S41/153—Light emitting diodes [LED] arranged in one or more lines arranged in a matrix
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/16—Laser light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/176—Light sources where the light is generated by photoluminescent material spaced from a primary light generating element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—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
    • F21S41/18—Combination of light sources of different types or shapes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/24—Light guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/67—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/67—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors
    • F21S41/675—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors by moving reflectors

Definitions

  • the invention relates to a headlamp for vehicles, with a plurality of light sources and an optical system assigned to the light sources, a first lighting unit with at least one light source for generating a first, dynamically variable luminous image and a second, laser lighting unit with at least one laser light source, at least one Beam deflection unit and at least one light conversion unit are provided, and the optics for merging the two light images, which are set up by the first light unit and on the light conversion unit of the second, laser light unit to produce a total light distribution on a roadway, the at least one beam deflection unit being around At least one axis of pivotable micromirrors is formed, the first lighting unit having a plurality of light sources and individual optics assigned to the light sources.
  • a headlight of this type is, for example, from the US 2011/0249460 A1 known.
  • this headlight also has a scanning laser system in which two laser beams deflected via moving micromirrors generate a luminous image on a fluorescent matrix, which is projected onto a roadway using a lens in order to generate a dynamically changeable light configuration there .
  • a flat laser element with individual, individually controllable light fields is provided, with the light fields each being assigned a microlens of a preceding microlens array, which projects the light image generated in each case onto a roadway.
  • an array of individual, individually controllable light sources preferably LEDs, is provided, with each light source being associated with individual optics or light guidance in the form of a light guide or a reflector.
  • the luminous image present on the light exit surface of the light guides is projected onto the road by means of optics, generally a lens.
  • headlights have also become known in which a central light source is provided, the light of which is projected onto a roadway via a plurality of light guides and via special optics in order to produce a dynamically variable light distribution thereon.
  • Digital light processors are sometimes used for light distribution, as in the US 7156542 B2 , or mechanically movable and therefore selectively controllable light guide, such as in the DE 40 06 938 A1 .
  • the document EP 2 525 140 A2 discloses a headlight for vehicles.
  • the document WO 2014/121315 also discloses a headlight for vehicles.
  • the documents US 2011/0249460 and US 2012/0008098 also disclose headlights for vehicles.
  • the light sources of the first lighting unit are LEDs
  • the at least one light conversion unit of the laser lighting unit is provided on the first lighting unit in the region of the light exit surface thereof.
  • a headlamp which offers a high resolution, although the number of individual light sources lies in a frame which does not cause any problems in terms of cost or technical implementation, for example in terms of cooling and dimensions.
  • the light sources of the first light unit are LEDs, there is a large selection with regard to the spectral light distribution and the light intensities at favorable pricing. It can also be advantageous if the optics have two separate optics units, each lighting unit being assigned one optics unit.
  • the optics may have a single common optics unit which is assigned to both lighting units.
  • the at least one optical unit is designed as a lens.
  • the at least one laser light source, the at least one beam deflection unit and the at least one light conversion unit of the laser lighting unit are combined in one structural unit.
  • An extremely proven variant is characterized in that the at least one beam deflection unit is designed as a micromirror that can be pivoted about at least one axis.
  • the first lighting unit has individual light sources arranged in at least two rows and a plurality of columns, the individual light sources being controllable for generating a dynamically variable light distribution on a roadway.
  • the at least one beam deflection unit is set up to generate a dynamically variable luminous image consisting of selectively illuminable segments on the light conversion unit.
  • FIG. 1 shows a headlight roughly schematically.
  • a headlight roughly schematically.
  • other parts which are well known to the person skilled in the art and also necessary for a headlight, such as a housing, adjusting devices, etc., have been omitted.
  • a first lighting unit 1 which, which is shown and described in more detail below, has an array of individual light sources, in particular LEDs, which can be controlled individually or in groups.
  • the individual light sources in this figure are also associated with individual optics, not shown, which are designed, for example, in the form of a light guide or a reflector and generate a luminous image on a light exit surface 2, which can be projected onto the road by means of optics, here using a lens 3 .
  • a second namely a laser lighting unit 4 is provided, which in Fig. 1 is shown on the left and which has as essential components a laser light source 5, which generates a laser beam 6, a beam deflection unit 7, which is designed here as a micromirror, and a light conversion unit 8.
  • a laser light source 5 which generates a laser beam 6
  • a beam deflection unit 7 which is designed here as a micromirror
  • a light conversion unit 8 Such scanning laser light units are known, wherein the laser beam 6 generates a predeterminable luminous image by means of a micromirror of the beam deflection unit 7 which swings around one or about two axes and which is also projected onto the roadway by means of further optics, here a lens 9, and is combined with the luminous image generated by the first lighting unit 1 to form an overall luminous image or an overall light distribution on the road.
  • two lenses 3 and 9 are shown here, this should not rule out that other optical constructions can be used. So the two lenses 3 and 9 one further optics, for example a lens, can be arranged downstream or optics can also be used which also use reflectors.
  • the laser light source 5 can, for example, generate a laser beam 6 with blue light, which is converted into white light on a phosphor of the light conversion unit 8. Although only a single laser lighting unit 4 is shown in this example, it is entirely possible to use at least one further laser unit, which in turn guides the laser beam to the light conversion unit 8 either by scanning the same beam deflection unit or via a further beam deflection unit.
  • FIG. 2 A first embodiment of the invention is shown, the first lighting unit 1 being shown in more concrete terms in one of the preferred embodiments and the same reference numerals being used for comparable parts.
  • the first lighting unit 1 On the front of the first lighting unit 1, one can see individual optics 10, which are designed here as reflectors, at the base - in Fig. 2 not visible - light sources, preferably LEDs, are arranged.
  • the lighting unit 1 has light sources arranged in three rows and 2 ⁇ 8 and 1 ⁇ 28 columns and, accordingly, many individual optics 10 or reflectors.
  • a light conversion unit 8 is provided in the area of the light exit surface of the first lighting unit 1, via which a laser beam 6 generated by a laser light source 5, deflected by an oscillating micromirror of a beam deflection unit 7, scans.
  • the laser lighting unit 4 is formed by the laser light source 5, the beam deflection unit 7 and the light conversion unit 8 arranged on the first lighting unit 1.
  • a lens 11 and 2 common to light units 1 and 4, namely a lens is provided which merges the luminous image present on the exit surfaces of the optics 10 and the luminous image determined by the scanning laser beam 6 on the light conversion unit 8 and can project onto a roadway.
  • the first lighting unit 1 here consists of a light source unit 12 with individual light sources 13, which are designed as LEDs and are arranged in three rows of 26 columns.
  • This light source unit 12 or the individual light sources 13 is assigned a primary optic 14 which, according to the number of LEDs or light sources 13, here 78, has individual totally reflecting light guides 15 which run forward and open into a light exit surface 16.
  • a light conversion unit 8, which is scanned by the laser beam 6, is in turn arranged on this light exit surface 16, the monochromatic laser light being converted into a light (white light) that can be used for illumination of the roadway.
  • Fig. 4 the luminous image of a first light unit shows alone, the illumination in this example extending from -1 ° to + 5 ° in the vertical direction and from 15 ° left to 15 ° right in the horizontal direction and a division into three rows of 28 columns each is. It should of course be clear that any division can be made here and, for example, the same number of columns does not have to be provided in every row.
  • Fig. 5 now shows, on an enlarged scale, an example luminous image which is generated by the second, laser light unit 4.
  • the areas in the horizontal direction from 6 ° left to 6 ° right and in the vertical direction from -1 ° to + 2 ° are preferred, since these Areas provide the majority of the impressions necessary for the driver to drive in the dark.
  • FIG. 6 A corresponding illuminated image is in Fig. 6 shown, from which one can determine the composition of the illuminated pictures 4 and 5 recognizes through the additional lighting of the in Fig. 5 the area shown, the functionality of the headlamp is significantly increased, since a high-resolution laser lighting unit can be used for this area, which enables, for example, a vertical resolution of 0.5 ° in the entire lighting area and of 0.1 ° in the horizontal area.
  • the values given below may further highlight the advantages of the invention.
  • the maximum illumination of the individual pixels caused by LEDs is currently around 80 to 100 lx, but this is relatively little for high beam. If you take the combination with the laser light unit, which also achieves a maximum of, for example, 80 to 100 lx, you get a high beam that offers lighting in the high beam maximum of 180 to 200 lx, which meets the current requirements for good headlights.
  • Color effects can also be blurred and a more homogeneous, uniformly colored light image can be created by overlaying different illuminated images.
  • the combination of the two lighting units also enables a high dynamic resolution to be achieved.
  • the relatively "coarse" pixels of the first lighting unit 1 cover a relatively large area, which is further subdivided by the high-resolution laser lighting unit 4. This means that very small areas can be controlled directly, so that the resolution of the overall system, as already mentioned, can be less than 0.1 ° horizontally and less than 0.5 ° vertically.
  • the areas in which the luminous images are combined can be designed as desired in accordance with the respective requirements, although in no way is a restriction to a high beam intended.
  • the combination of the two lighting units means that the illumination by the laser lighting unit 4 can also be dispensed with at lower speeds, which is advantageous for safety reasons, since for example when the vehicle is stationary, a light which may be dangerous or unpleasant for the person and emanates from the laser lighting unit is not delivered.

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

Claims (7)

  1. Phare pour véhicules, comportant plusieurs sources lumineuses (5, 13) et une optique (3, 9 ; 11) associée aux sources lumineuses
    dans lequel il est prévu une première unité d'éclairage (1) avec au moins une source de lumière (13) pour générer une première image éclairée dynamiquement variable et une deuxième unité d'éclairage laser (4) avec au moins une source de lumière laser (5), au moins une unité de déviation de faisceau (7) et au moins une unité de conversion de lumière (8), et l'optique (3, 9 ; 11) sont prévues pour la combinaison des deux images lumineuses, qui est établie par la première unité lumineuse et sur l'unité de conversion de la lumière de la deuxième unité lumineuse à laser (4) pour former une distribution de lumière totale sur une chaussée, la au moins une unité de déviation du faisceau (7) étant conçue comme un micro-miroir pouvant pivoter autour d'au moins un axe, la première unité lumineuse (1) présentant plusieurs sources lumineuses (13) et des optiques individuelles (10, 15) associées chacune aux sources lumineuses,
    caractérisé en ce que
    les sources lumineuses (13) de la première unité d'éclairage (1) sont des LED, et la au moins une unité de conversion de la lumière (8) de l'unité d'éclairage laser (4) est prévue sur la première unité d'éclairage (1) dans la région de sa surface de sortie de la lumière (16) des optiques individuelles (10, 15).
  2. Phare selon la revendication 1, caractérisé en ce que le système optique comprend deux unités optiques séparées (3,9), chaque unité d'éclairage (1, 4) étant associée à une unité optique respective.
  3. Phare selon la revendication 1, caractérisé en ce que le système optique comprend une seule unité optique commune (11) qui est associée aux deux unités d'éclairage (1, 4).
  4. Phare selon l'une des revendications 1 à 3, caractérisé en ce qu'au moins une unité optique (3, 9 ; 11) est formée comme une lentille.
  5. Phare selon l'une des revendications 1 à 4, caractérisé en ce que l'au moins une source de lumière laser (5), l'au moins une unité de déviation de faisceau (7) et l'au moins une unité de conversion de lumière (8) de l'unité de lumière laser (4) sont réunies en une unité structurelle.
  6. Phare selon l'une des revendications 1 à 5, caractérisé en ce que la première unité d'éclairage (1) présente des sources lumineuses individuelles (13) disposées en au moins deux rangées et plusieurs colonnes, les sources lumineuses individuelles pouvant être commandées pour générer une répartition de lumière dynamiquement variable sur une chaussée.
  7. Phare selon l'une des revendications 1 à 8, caractérisé en ce que la au moins une unité de déviation du faisceau (7) est configurée pour générer une image lumineuse dynamiquement variable composée de segments qui peuvent être éclairés de manière sélective sur l'unité de conversion de la lumière (8).
EP14738353.3A 2013-06-25 2014-05-26 Phare de véhicule Active EP3014171B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50417/2013A AT514333B1 (de) 2013-06-25 2013-06-25 Scheinwerfer für Fahrzeuge
PCT/AT2014/050123 WO2014205466A1 (fr) 2013-06-25 2014-05-26 Phare pour véhicules automobiles

Publications (2)

Publication Number Publication Date
EP3014171A1 EP3014171A1 (fr) 2016-05-04
EP3014171B1 true EP3014171B1 (fr) 2020-07-01

Family

ID=51176009

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14738353.3A Active EP3014171B1 (fr) 2013-06-25 2014-05-26 Phare de véhicule

Country Status (6)

Country Link
US (1) US10101001B2 (fr)
EP (1) EP3014171B1 (fr)
JP (1) JP6018342B2 (fr)
CN (1) CN105308385A (fr)
AT (1) AT514333B1 (fr)
WO (1) WO2014205466A1 (fr)

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CN110454693A (zh) * 2019-08-14 2019-11-15 浙江比肯科技有限公司 一种采用激光增强的led发光单元
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JP6018342B2 (ja) 2016-11-02
WO2014205466A1 (fr) 2014-12-31
US10101001B2 (en) 2018-10-16
JP2016524802A (ja) 2016-08-18
US20160146419A1 (en) 2016-05-26
AT514333A4 (de) 2014-12-15
AT514333B1 (de) 2014-12-15
EP3014171A1 (fr) 2016-05-04
CN105308385A (zh) 2016-02-03

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