EP3317580A1 - Lighting module for a vehicle headlamp - Google Patents

Lighting module for a vehicle headlamp

Info

Publication number
EP3317580A1
EP3317580A1 EP16732218.9A EP16732218A EP3317580A1 EP 3317580 A1 EP3317580 A1 EP 3317580A1 EP 16732218 A EP16732218 A EP 16732218A EP 3317580 A1 EP3317580 A1 EP 3317580A1
Authority
EP
European Patent Office
Prior art keywords
light
exit surface
lighting module
carrier element
module
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
EP16732218.9A
Other languages
German (de)
French (fr)
Other versions
EP3317580B1 (en
Inventor
Jürgen ZORN
Thomas EDLETZBERGER
Christian BEMMER
Peter Schadenhofer
Martin Schragl
Martin Stein
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
ZKW Group 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
Application filed by ZKW Group GmbH filed Critical ZKW Group GmbH
Publication of EP3317580A1 publication Critical patent/EP3317580A1/en
Application granted granted Critical
Publication of EP3317580B1 publication Critical patent/EP3317580B1/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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/285—Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24-F21S41/28
    • 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
    • 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
    • F21S41/20—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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/255—Lenses with a front view of circular or truncated circular outline
    • 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
    • F21S41/28—Cover glass
    • 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/47—Attachment thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/64—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
    • 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
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2101/00—Point-like light sources

Definitions

  • the invention relates to a lighting module for a vehicle headlight, wherein the lighting module has at least one excitable by illumination with laser light for emitting visible light element and at least one translucent support member, wherein the support member has at least one light entrance surface and at least one light entry surface opposite light exit surface.
  • Lighting modules according to the prior art which have a light element which can be excited by laser light for emitting visible light have the disadvantage that the light emitted by the luminous element is generally non-directional and has to be positioned or shaped with respect to a downstream optics by means of additional components ,
  • An object of the invention is therefore to remedy this disadvantage.
  • This object is achieved with a lighting module of the aforementioned type, in which according to the invention the at least one luminous element is arranged to radiate light into the light entry surface on the at least one light entry surface of the support element, wherein a) the at least one light exit surface of the support element is bordered by a light exit surface opaque masking is limited or b) the at least one light exit surface extends up to side surfaces of the carrier element, wherein at least one side surface has two adjoining side sections, which are inclined to form a light-dark boundary to each other.
  • the inclination of the side surfaces could be between 15 ° and 90 °.
  • laser light is understood as meaning a light emitted by a laser light source having a wavelength between 550 and 200 nm act.
  • the carrier element consists of glass.
  • the at least one light entry surface and the at least one light exit surface are parallel to one another.
  • the ratio of the light entry surface to the light exit surface is between 1: 1 and 1:10, the ratio of the value of the light exit surface measured in mm 2 to the value of the distance between the light entrance and light exit surface measured in mm less than 2: 1 and the ratio of the value of the light entry surface measured in mm 2 to the value of the distance between the light entry surface and the light entry surface measured in mm is less than 1: 2.
  • a light image with an angular width of +/- 5 0 is typically sufficient.
  • the light spot so excited by laser light region of the light emitting element, very small (0.1mm ⁇ D ⁇ 1mm) and thus concentrated to design and also the distance between light - And light exit area to choose large to shade the disturbing yellowing at the edge of the angle range.
  • there is a minimum distance between light entrance and exit surface of 10 mm at longer distances the light utilization efficiency of the system is reduced, but the achievable maximum intensity is increased.
  • the distance between light entrance and light exit can be less than 10mm.
  • integrator rods light entry and exit surfaces typically identical, distance very high
  • the carrier element is a plane-parallel plate, which preferably has a thickness of at least 0.2 mm.
  • the masking consists of a lacquer layer, a polymer or a metallic coating.
  • a mask consisting of one Metallic coating forms a reflective surface, which has advantages especially in high-energy applications, since such a coating is particularly robust.
  • the masking delimits the light exit surface to a substantially hexagonal geometric shape, which consists of a rectangular area and a trapezoidal surface seated on one half of the rectangular area, wherein a side line of the trapezoidal area a side line of the rectangular surface extends in alignment.
  • the inclination of the side line of the trapezoidal surface, which faces the aligned extending side line is for example between 15 and 90 °.
  • Another aspect of the invention relates to a vehicle headlamp comprising a lighting module according to the invention and a laser light source for exciting the lighting module or lighting element.
  • the vehicle headlight further comprises a projection lens, in particular an aspherical projection lens, for imaging the light emitted by the light module onto a region situated in front of the vehicle headlight.
  • a projection lens in particular an aspherical projection lens
  • the at least one light exit surface of the lighting module has a course adapted to the field curvature of the projection lens. This makes it possible that each point is imaged on the light exit surface with the same geometric properties through the lens, whereby aberrations can be avoided.
  • FIG. 1 shows a front view of a first embodiment of a lighting module according to the invention
  • FIG. 2 shows a rear view of the lighting module from FIG. 1,
  • FIG. 3 shows a side view of the lighting module according to FIGS. 1 and 2
  • FIG. 4 shows a perspective illustration of a second embodiment of a lighting module
  • Figure 5 is a schematic plan view of the light emitting module according to Figure 4.
  • Figure 6 is a schematic representation of a vehicle headlamp with a lighting module according to the invention.
  • FIG. 1 shows a front view of a first embodiment of a lighting module 1 according to the invention.
  • a lighting module 1 for a vehicle headlight 2 shown in FIG. 6 can be seen, wherein the lighting module 1 has at least one lighting element 3 that can be excited by illumination with laser light to emit visible light.
  • the luminous element 3 is arranged on the rear side of a light-permeable carrier element 4 shown in FIG. 2, on which a light entry surface 4a is formed, wherein the luminous element 3 irradiates light into the carrier element 4 via the light entry surface 4a.
  • the front side of the carrier element 4 shown in FIG. 1 has a light exit surface 4b lying opposite the light entry surface 4a, which in the exemplary embodiment shown is surrounded by an opaque masking 5 and thus delimited.
  • the masking 5 may for example consist of a lacquer layer, a polymer or a metallic layer.
  • the masking 5 delimits the light exit surface 4b to a substantially hexagonal geometric shape, which consists of a rectangular surface 4b 'and a trapezium surface 4b "resting on one half of the rectangular surface, a lateral line of the trapezoidal surface 4b" extending a lateral line of the rectangular surface 4b "in alignment.
  • a light-dark boundary can already be formed directly on the light exit surface 4b of the light module 1 in a simple manner.
  • FIG. 3 shows a side view of the lighting module 1 according to FIGS. 1 and 2.
  • the light entry surface 4a and the light exit surface 4b are preferably parallel to one another.
  • the thickness d of the carrier element 4 is preferably at least 0.2 mm.
  • FIG. 4 shows a perspective view of a second embodiment of a lighting module 1. In contrast to the first embodiment, the lighting module 1 has no masking 5.
  • the carrier element 4 is shaped such that the light exit surface 4b extends up to the side surfaces 6a to 6d of the carrier element 4, wherein at least one side surface 6b has adjoining side sections 6b 'and 6b "which are inclined towards each other to form a light-dark boundary The light exit surface 4b is therefore limited directly by the side surfaces 6a to 6d.
  • FIG. 5 shows a schematic plan view of the light-emitting module 1 according to FIG. 4. Similar to the light-emitting module 1 according to FIGS. 1 to 3, the light-emitting module 1 according to the second embodiment likewise has a light-emitting element 3 which irradiates light into the light-entry surface 4 a. This light can also be reflected via the side surfaces 6a to 6d, which are designed to be reflective, toward the light exit surface 4b. Thereby, it is possible to make the light entrance surface 4a smaller than the light exit surface 4b.
  • the vehicle headlight 2 comprises a lighting module 1 according to the invention, a laser light source 7 for exciting the lighting module 1 and a projection lens 8 for imaging the light emitted by the lighting module 1 in front of it Vehicle headlight 2 lying area.
  • the light exit surface 4b advantageously has a shape adapted to the field curvature E of the projection lens 8, so that each point on the light exit surface 4b is imaged by the projection lens 8 with the same imaging properties.

Landscapes

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

Abstract

A lighting module (1) for a vehicle headlamp (2), the lighting module (1) comprising at least one lighting element (3), which is excitable to emit visible light when illuminated by laser light, and at least one light-transmissive carrier element (4), the carrier element (4) having at least one light-entry surface (4a) and at least one light-exit surface (4b) lying opposite to the light-entry surface (4a), the at least one lighting element (3) being arranged to radiate light into the light-entry surface (4a) at the at least one light-entry surface (4a) of the carrier element (4), wherein a) the at least one light-exit surface (4b) of the carrier element (4) is bounded by a light-opaque mask (5) surrounding the light-exit surface (4b) or b) the at least one light-exit surface (4b) reaches up to the side surfaces (6a to 6d) of the carrier element (4), wherein at least one side surface (6b) has two side portions (6b', 6b") adjoining one another, said side portions being inclined toward one another for forming a light/dark boundary.

Description

LEUCHTMODUL FÜR EINEN FAHRZEUGSCHEINWERFER  LIGHT MODULE FOR A VEHICLE HEADLAMP
Die Erfindung betrifft ein Leuchtmodul für einen Fahrzeugscheinwerfer , wobei das Leuchtmodul zumindest ein durch Beleuchtung mit Laserlicht zur Ausstrahlung von sichtbarem Licht anregbares Leuchtelement und zumindest ein lichtdurchlässiges Trägerelement aufweist, wobei das Trägerelement zumindest eine Lichteintrittsfläche und zumindest eine der Lichteintrittsfläche gegenüberliegende Lichtaustrittsfläche aufweist. The invention relates to a lighting module for a vehicle headlight, wherein the lighting module has at least one excitable by illumination with laser light for emitting visible light element and at least one translucent support member, wherein the support member has at least one light entrance surface and at least one light entry surface opposite light exit surface.
Leuchtmodule gemäß dem Stand der Technik, welche ein mit Laserlicht zur Ausstrahlung von sichtbarem Licht anregbares Leuchtelement aufweisen, haben den Nachteil, dass das durch das Leuchtelement abgestrahlte Licht im Allgemeinen ungerichtet ist und in Bezug auf eine nachgeschaltete Optik mittels zusätzlicher Bauteile positioniert oder geformt werden muss. Lighting modules according to the prior art which have a light element which can be excited by laser light for emitting visible light have the disadvantage that the light emitted by the luminous element is generally non-directional and has to be positioned or shaped with respect to a downstream optics by means of additional components ,
Eine Aufgabe der Erfindung besteht daher darin, diesen Nachteil zu beheben. Diese Aufgabe wird mit einem Leuchtmodul der eingangs genannten Art gelöst, bei welchen erfindungsgemäß das zumindest eine Leuchtelement zur Einstrahlung von Licht in die Lichteintrittsfläche an der zumindest einen Lichteintrittsfläche des Trägerelements angeordnet ist, wobei a) die zumindest eine Lichtaustrittsfläche des Trägerelements durch eine die Lichtaustrittsfläche umrandende lichtundurchlässige Maskierung begrenzt ist oder b) die zumindest eine Lichtaustrittsfläche bis an Seitenflächen des Trägerelements heranreicht, wobei zumindest eine Seitenfläche zwei aneinander angrenzende Seitenabschnitte aufweist, die zur Ausbildung einer Hell- Dunkel-Grenze zueinander geneigt sind. An object of the invention is therefore to remedy this disadvantage. This object is achieved with a lighting module of the aforementioned type, in which according to the invention the at least one luminous element is arranged to radiate light into the light entry surface on the at least one light entry surface of the support element, wherein a) the at least one light exit surface of the support element is bordered by a light exit surface opaque masking is limited or b) the at least one light exit surface extends up to side surfaces of the carrier element, wherein at least one side surface has two adjoining side sections, which are inclined to form a light-dark boundary to each other.
Bei einer Ausführungsform gemäß Punkt b) könnte die Neigung der Seitenflächen zwischen 15° und 90° betragen. Im Rahmen dieser Offenbarung wird unter dem Ausdruck„Laserlicht" ein von einer Laserlichtquelle abgestrahltes Licht mit einer Wellenlange zwischen 550 und 200 nm verstanden. Vorzugsweise wird blaues Licht mit Wellenlänge von ca. 450 nm eingesetzt. Bei dem Leuchtelement kann es sich beispielsweise um einen Phosphor handeln. In one embodiment according to point b), the inclination of the side surfaces could be between 15 ° and 90 °. For the purposes of this disclosure, the term "laser light" is understood as meaning a light emitted by a laser light source having a wavelength between 550 and 200 nm act.
Vorteilhafterweise kann vorgesehen sein, dass das Trägerelement aus Glas besteht. Insbesondere kann vorgesehen sein, dass die zumindest eine Lichteintrittsfläche und die zumindest eine Lichtaustrittsfläche zueinander parallel sind. Advantageously, it can be provided that the carrier element consists of glass. In particular, it can be provided that the at least one light entry surface and the at least one light exit surface are parallel to one another.
Außerdem kann vorgesehen sein, dass das Verhältnis der Lichteintrittsfläche zur Lichtaustrittsfläche zwischen 1:1 und 1:10 beträgt, das Verhältnis des Wertes der Lichtaustrittsfläche gemessen in mm2 zu dem Wert des Abstands zwischen der Lichteintritts- und Lichtaustrittsfläche gemessen in mm kleiner als 2:1 ist und das Verhältnis des Wertes der Lichteintrittsflä- che gemessen in mm2 zu dem Wert des Abstands zwischen der Lichteintritts- und Lichteintrittsfläche gemessen in mm kleiner als 1:2 ist. Bei einer Fernlichtanwendung reicht typischerweise ein Lichtbild mit einer Winkelbreite von +/-50 aus. Bei einer typischen Linsenbrennweite von 40mm würde das eine Ausdehnung in der Bildebene von 10mm bedeuten. Verringert sich die Brennweite wird auch dieser Wert kleiner, aber auch die erreichbaren Intensitäten werden reduziert. Um möglichst hohe Intensitäten für den Einsatz des Leuchtmoduls als Fernlicht zu erreichen, macht es Sinn, den Leuchtfleck, also den durch Laserlicht angeregten Bereich des Leuchtelements, sehr klein (0.1mm < D < 1mm) und damit konzentriert auszugestalten und zusätzlich den Abstand zwischen Lichteintritts- und Lichtaustrittsfläche groß zu wählen um die störende Gelbfärbung am Rand des Winkelbereichs abzuschatten. Um die Funktion sinnvoll umzusetzen, ergibt sich eine minimale Distanz zwischen Lichteintritts- und Austrittsfläche von 10mm, bei größeren Distanzen reduziert sich die Lichtnutzungseffizienz des Systems, aber die erreichbare maximale Intensität wird erhöht. Bei einer Anwendung für homogene Ausleuchtung, bei der keine hohen Intensitäten gefordert sind, ist es sinnvoll, einen größeren Leuchtfleck (1mm < D < 10mm) umzusetzen. Hier kann die Distanz zwischen Lichteintritt- und Lichtaustritt auch kleiner 10mm sein. Es gibt aber auch Anwendungen, wo eine hohe Distanz zur Homogenisierung der Beleuchtung eingesetzt wird. Sogenannte Integratorstäbe (Lichteintritt- und austrittsflächen typischerweise ident, Distanz sehr hoch) können genutzt werden, um Lichtbündel verschiedener Lichtquellen zu einem möglichst homogenen Einzellichtbündel zu kombinieren. In addition, it can be provided that the ratio of the light entry surface to the light exit surface is between 1: 1 and 1:10, the ratio of the value of the light exit surface measured in mm 2 to the value of the distance between the light entrance and light exit surface measured in mm less than 2: 1 and the ratio of the value of the light entry surface measured in mm 2 to the value of the distance between the light entry surface and the light entry surface measured in mm is less than 1: 2. In a high beam application, a light image with an angular width of +/- 5 0 is typically sufficient. At a typical lens focal length of 40mm, this would mean an expansion in the image plane of 10mm. As the focal length decreases, this value also becomes smaller, but also the achievable intensities are reduced. To achieve the highest possible intensities for the use of the light module as a high beam, it makes sense, the light spot, so excited by laser light region of the light emitting element, very small (0.1mm <D <1mm) and thus concentrated to design and also the distance between light - And light exit area to choose large to shade the disturbing yellowing at the edge of the angle range. In order to implement the function sensibly, there is a minimum distance between light entrance and exit surface of 10 mm, at longer distances the light utilization efficiency of the system is reduced, but the achievable maximum intensity is increased. In an application for homogeneous illumination, in which no high intensities are required, it makes sense to implement a larger light spot (1mm <D <10mm). Here, the distance between light entrance and light exit can be less than 10mm. But there are also applications where a high distance is used to homogenize the lighting. So-called integrator rods (light entry and exit surfaces typically identical, distance very high) can be used to combine light bundles of different light sources to form a homogenous single light bundle.
Zudem kann vorgesehen sein, dass das Trägerelement eine planparallele Platte ist, die vorzugsweise eine Dicke von zumindest 0,2 mm aufweist. In addition, it can be provided that the carrier element is a plane-parallel plate, which preferably has a thickness of at least 0.2 mm.
Insbesondere kann vorgesehen sein, dass die Maskierung aus einer Lackschicht, einem Polymer oder einer metallischen Beschichtung besteht. Eine Maskierung bestehend aus einer metallischen Beschichtung bildet eine reflektierende Oberfläche, die insbesondere bei Hochenergieanwendungen Vorteile aufweist, da eine solche Beschichtung besonders robust ist. In particular, it can be provided that the masking consists of a lacquer layer, a polymer or a metallic coating. A mask consisting of one Metallic coating forms a reflective surface, which has advantages especially in high-energy applications, since such a coating is particularly robust.
Zur Abbildung einer Hell-Dunkel-Grenze direkt am Trägerelement, kann vorgesehen sein, dass die Maskierung die Lichtaustrittsfläche auf eine im Wesentlichen sechseckige geometrische Form begrenzt, welche aus einer Rechteckfläche und einem auf einer Hälfte der Rechteckfläche aufsitzenden Trapezfläche besteht, wobei eine Seitenlinie der Trapezfläche eine Seitenlinie der Rechteckfläche fluchtend verlängert. Die Neigung der Seitenlinie der Trapezfläche, welche der fluchtend verlängernden Seitenlinie gegenüberliegt beträgt zum Beispiel zwischen 15 und 90°. For imaging a light / dark boundary directly on the carrier element, it can be provided that the masking delimits the light exit surface to a substantially hexagonal geometric shape, which consists of a rectangular area and a trapezoidal surface seated on one half of the rectangular area, wherein a side line of the trapezoidal area a side line of the rectangular surface extends in alignment. The inclination of the side line of the trapezoidal surface, which faces the aligned extending side line is for example between 15 and 90 °.
Weiterer Aspekt Erfindung betrifft einen Fahrzeugscheinwerfer umfassend ein erfindungsgemäßes Leuchtmodul und eine Laserlichtquelle zur Anregung des Leuchtmoduls bzw. Leuchtelements . Another aspect of the invention relates to a vehicle headlamp comprising a lighting module according to the invention and a laser light source for exciting the lighting module or lighting element.
Insbesondere kann vorgesehen sein, dass der Fahrzeugscheinwerfer ferner eine Projektionslinse, insbesondere eine asphärische Projektionslinse, zur Abbildung des von dem Leuchtmodul abgestrahlten Lichtes auf einen vor dem Fahrzeugscheinwerfer liegenden Bereich aufweist. In particular, it may be provided that the vehicle headlight further comprises a projection lens, in particular an aspherical projection lens, for imaging the light emitted by the light module onto a region situated in front of the vehicle headlight.
Dabei kann es günstig sein, wenn die zumindest eine Lichtaustrittsfläche des Leuchtmoduls einen der Bildfeldwölbung der Projektionslinse angepassten Verlauf aufweist. Dadurch ist möglich, dass jeder Punkt an der Lichtaustrittsfläche mit den gleichen geometrischen Eigenschaften durch die Linse abgebildet wird, wodurch Abbildungsfehler vermieden werden können. In this case, it may be favorable if the at least one light exit surface of the lighting module has a course adapted to the field curvature of the projection lens. This makes it possible that each point is imaged on the light exit surface with the same geometric properties through the lens, whereby aberrations can be avoided.
Die Erfindung ist im Folgenden anhand beispielhafter und nicht einschränkender Ausführungsformen näher erläutert, die in den Figuren veranschaulicht ist. Darin zeigt The invention is explained in more detail below with reference to exemplary and non-limiting embodiments, which is illustrated in the figures. It shows
Figur 1 eine Vorderansicht einer ersten Ausführungsform eines erfindungsgemäßen Leuchtmoduls, 1 shows a front view of a first embodiment of a lighting module according to the invention,
Figur 2 eine Rückansicht des Leuchtmoduls aus Figur 1, FIG. 2 shows a rear view of the lighting module from FIG. 1,
Figur 3 eine Seitenansicht des Leuchtmoduls gemäß Figuren 1 und 2, Figur 4 eine perspektivische Darstellung einer zweiten Ausführungsform eines Leuchtmoduls, FIG. 3 shows a side view of the lighting module according to FIGS. 1 and 2, FIG. 4 shows a perspective illustration of a second embodiment of a lighting module,
Figur 5 eine schematische Draufsicht auf das Leuchtmodul gemäß Figur 4 und Figure 5 is a schematic plan view of the light emitting module according to Figure 4 and
Figur 6 eine schematische Darstellung eines Fahrzeugscheinwerfers mit einem erfindungsgemäßen Leuchtmodul. Figure 6 is a schematic representation of a vehicle headlamp with a lighting module according to the invention.
In den folgenden Ausführungsbeispielen bezeichnen - sofern nicht anders angegeben - gleiche Bezugszeichen gleiche Merkmale. Unless otherwise indicated, in the following embodiments, like reference numerals designate like features.
Figur 1 zeigt eine Vorderansicht einer ersten Ausführungsform eines erfindungsgemäßen Leuchtmoduls 1. Darin ist ein Leuchtmodul 1 für einen in Figur 6 dargestellten Fahrzeugscheinwerfer 2 erkennbar, wobei das Leuchtmodul 1 zumindest ein durch Beleuchtung mit Laserlicht zur Ausstrahlung von sichtbarem Licht anregbares Leuchtelement 3 aufweist. Das Leuchtelement 3 ist an der in Figur 2 gezeigten Rückseite eines lichtdurchlässigen Trägerelements 4 angeordnet, an der eine Lichteintrittsfläche 4a ausgebildet ist, wobei das Leuchtelement 3 Licht über die Lichteintrittsfläche 4a in das Trägerelement 4 einstrahlt. Die in Figur 1 gezeigte Vorderseite des Trägerelements 4 weist eine der Lichteintrittsfläche 4a gegenüberliegende Lichtaustrittsfläche 4b auf, die in dem gezeigten Ausführungsbeispiel durch eine lichtundurchlässige Maskierung 5 umrandet und damit begrenzt ist. Die Maskierung 5 kann beispielsweise aus einer Lackschicht, einem Polymer oder einer metallischen Schicht bestehen. Die Maskierung 5 begrenzt die Lichtaustrittsfläche 4b auf eine im Wesentlichen sechseckige geometrische Form, welche aus einer Rechteckfläche 4b' und einer auf einer Hälfte der Rechteckfläche aufliegenden Trapezfläche 4b" besteht, wobei eine Seitenlinie der Trapezfläche 4b" eine Seitenlinie der Rechteckfläche 4b' fluchtend verlängert. Damit kann in einfacher Weise eine Hell-Dunkel-Grenze bereits direkt an der Lichtaustrittsfläche 4b des Leuchtmoduls 1 ausgebildet werden. 1 shows a front view of a first embodiment of a lighting module 1 according to the invention. Therein, a lighting module 1 for a vehicle headlight 2 shown in FIG. 6 can be seen, wherein the lighting module 1 has at least one lighting element 3 that can be excited by illumination with laser light to emit visible light. The luminous element 3 is arranged on the rear side of a light-permeable carrier element 4 shown in FIG. 2, on which a light entry surface 4a is formed, wherein the luminous element 3 irradiates light into the carrier element 4 via the light entry surface 4a. The front side of the carrier element 4 shown in FIG. 1 has a light exit surface 4b lying opposite the light entry surface 4a, which in the exemplary embodiment shown is surrounded by an opaque masking 5 and thus delimited. The masking 5 may for example consist of a lacquer layer, a polymer or a metallic layer. The masking 5 delimits the light exit surface 4b to a substantially hexagonal geometric shape, which consists of a rectangular surface 4b 'and a trapezium surface 4b "resting on one half of the rectangular surface, a lateral line of the trapezoidal surface 4b" extending a lateral line of the rectangular surface 4b "in alignment. Thus, a light-dark boundary can already be formed directly on the light exit surface 4b of the light module 1 in a simple manner.
Figur 3 zeigt eine Seitenansicht des Leuchtmoduls 1 gemäß den Figuren 1 und 2. Die Licht- eintrittsfläche 4a und die Lichtaustrittsfläche 4b sind vorzugsweise zueinander parallel. Die Dicke d des Trägerelements 4 beträgt vorzugsweise zumindest 0,2 mm. Figur 4 zeigt eine perspektivische Darstellung einer zweiten Ausführungsform eines Leuchtmoduls 1. Im Gegensatz zur ersten Ausführungsform weist das Leuchtmodul 1 keine Maskierung 5 auf. Das Trägerelement 4 ist so geformt, dass die Lichtaustrittsfläche 4b bis an die Seitenflächen 6a bis 6d des Trägerelement 4 heranreicht, wobei zumindest eine Seitenfläche 6b aneinander angrenzende Seitenabschnitte 6b' und 6b" aufweist, die zur Ausbildung einer Hell-Dunkel-Grenze zueinander geneigt sind. Die Lichtaustrittsfläche 4b wird daher direkt durch die Seitenflächen 6a bis 6d begrenzt. FIG. 3 shows a side view of the lighting module 1 according to FIGS. 1 and 2. The light entry surface 4a and the light exit surface 4b are preferably parallel to one another. The thickness d of the carrier element 4 is preferably at least 0.2 mm. FIG. 4 shows a perspective view of a second embodiment of a lighting module 1. In contrast to the first embodiment, the lighting module 1 has no masking 5. The carrier element 4 is shaped such that the light exit surface 4b extends up to the side surfaces 6a to 6d of the carrier element 4, wherein at least one side surface 6b has adjoining side sections 6b 'and 6b "which are inclined towards each other to form a light-dark boundary The light exit surface 4b is therefore limited directly by the side surfaces 6a to 6d.
Figur 5 zeigt eine schematische Draufsicht auf das Leuchtmodul 1 gemäß Figur 4. Ähnlich zu dem Leuchtmodul 1 gemäß den Figuren 1 bis 3 weist das Leuchtmodul 1 gemäß der zweiten Ausführungsform ebenso ein Leuchtelement 3 auf, welches Licht in die Lichteintrittsfläche 4a einstrahlt. Dieses Licht kann zudem über die Seitenflächen 6a bis 6d, die reflektierend ausgeführt sind, hin zu der Lichtaustrittsfläche 4b reflektiert werden. Dadurch ist es möglich, die Lichteintrittsfläche 4a kleiner als die Lichtaustrittsfläche 4b auszuführen. FIG. 5 shows a schematic plan view of the light-emitting module 1 according to FIG. 4. Similar to the light-emitting module 1 according to FIGS. 1 to 3, the light-emitting module 1 according to the second embodiment likewise has a light-emitting element 3 which irradiates light into the light-entry surface 4 a. This light can also be reflected via the side surfaces 6a to 6d, which are designed to be reflective, toward the light exit surface 4b. Thereby, it is possible to make the light entrance surface 4a smaller than the light exit surface 4b.
Figur 6 zeigt eine schematische Darstellung eines Fahrzeugscheinwerfers 2 mit einem erfindungsgemäßen Leuchtmodul 1. Der Fahrzeugscheinwerfer 2 umfasst ein erfindungs gemäßes Leuchtmodul 1, eine Laserlichtquelle 7 zur Anregung des Leuchtmoduls 1 und eine Projektionslinse 8 zur Abbildung des von dem Leuchtmodul 1 abgestrahlten Lichtes auf einen vor dem Fahrzeugscheinwerfer 2 liegenden Bereich. Die Lichtaustrittsfläche 4b weist vorteilhafterweise eine an die Bildfeldwölbung E der Projektionslinse 8 angepasste Form auf, sodass jeder Punkt an der Lichtaustrittsfläche 4b mit den gleichen Abbildungseigenschaften durch die Projektionslinse 8 abgebildet wird. 6 shows a schematic representation of a vehicle headlight 2 with a lighting module 1 according to the invention. The vehicle headlight 2 comprises a lighting module 1 according to the invention, a laser light source 7 for exciting the lighting module 1 and a projection lens 8 for imaging the light emitted by the lighting module 1 in front of it Vehicle headlight 2 lying area. The light exit surface 4b advantageously has a shape adapted to the field curvature E of the projection lens 8, so that each point on the light exit surface 4b is imaged by the projection lens 8 with the same imaging properties.
In Anbetracht dieser Lehre ist der Fachmann in der Lage, ohne erfinderisches Zutun zu anderen, nicht gezeigten Ausführungsformen der Erfindung zu gelangen. Die Erfindung ist daher nicht auf die gezeigten Ausführungsformen beschränkt. Auch können einzelne Aspekte der Erfindung bzw. der Ausführungsformen aufgegriffen und miteinander kombiniert werden. Wesentlich sind die der Erfindung zugrunde liegenden Gedanken, die durch einen Fachmann in Kenntnis dieser Beschreibung in mannigfaltiger Weise ausgeführt werden können und trotzdem als solche aufrechterhalten bleiben. In view of this teaching, one skilled in the art will be able to arrive at other, not shown embodiments of the invention without inventive step. The invention is therefore not limited to the embodiments shown. Also, individual aspects of the invention or the embodiments can be picked up and combined with each other. Essential are the ideas underlying the invention, which can be performed by a person skilled in the knowledge of this description in a variety of ways and still remain maintained as such.

Claims

ANSPRÜCHE
1. Leuchtmodul (1) für einen Fahrzeugscheinwerfer (2), wobei das Leuchtmodul (1) zumindest ein durch Beleuchtung mit Laserlicht zur Ausstrahlung von sichtbarem Licht anregbares Leuchtelement (3) und zumindest ein lichtdurchlässiges Trägerelement (4) aufweist, wobei das Trägerelement (4) zumindest eine Lichteintrittsfläche (4a) und zumindest eine der Lichteintrittsfläche (4a) gegenüberliegende Lichtaustrittsfläche (4b) aufweist, dadurch gekennzeichnet, dass das zumindest eine Leuchtelement (3) zur Einstrahlung von Licht in die Lichteintrittsfläche (4a) an der zumindest einen Lichteintrittsfläche (4a) des Trägerelements (4) angeordnet ist, wobei a) die zumindest eine Lichtaustrittsfläche (4b) des Trägerelements (4) durch eine die Licht- austrittsfläche (4b) umrandende lichtundurchlässige Maskierung (5) begrenzt ist oder b) die zumindest eine Lichtaustrittsfläche (4b) bis an Seitenflächen (6a bis 6d) des Trägerelements (4) heranreicht, wobei zumindest eine Seitenfläche (6b) zwei aneinander angrenzende Seitenabschnitte (6b', 6b") aufweist, die zur Ausbildung einer Hell-Dunkel-Grenze zueinander geneigt sind. 1. lighting module (1) for a vehicle headlight (2), wherein the lighting module (1) at least one excitable by illumination with laser light for emitting visible light luminous element (3) and at least one translucent support member (4), wherein the carrier element (4 ) has at least one light entry surface (4a) and at least one light exit surface (4b) opposite the light entry surface (4a), characterized in that the at least one luminous element (3) for irradiating light into the light entry surface (4a) at the at least one light entry surface (4a a) the at least one light exit surface (4b) of the carrier element (4) is delimited by an opaque masking (5) bordering the light exit surface (4b) or b) the at least one light exit surface (4b ) reaches to side surfaces (6a to 6d) of the carrier element (4), wherein at least one side surface (6b) has two adjoining side sections (6b ', 6b ") which are inclined towards one another to form a light-dark boundary.
2. Leuchtmodul (1) nach Anspruch 1, dadurch gekennzeichnet, dass das Trägerelement (4) aus Glas besteht. Second light module (1) according to claim 1, characterized in that the carrier element (4) consists of glass.
3. Leuchtmodul (1) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die zumindest eine Lichteintrittsfläche (4a) und die zumindest eine Lichtaustrittsfläche (4b) zueinander parallel sind. 3. light module (1) according to claim 1 or 2, characterized in that the at least one light entry surface (4a) and the at least one light exit surface (4b) are parallel to each other.
4. Leuchtmodul (1) nach Anspruch 3, dadurch gekennzeichnet, dass das Verhältnis der Lichteintrittsfläche (4a) zur Lichtaustrittsfläche (4b) zwischen 1:1 und 1:10 beträgt, das Verhältnis des Wertes der Lichtaustrittsfläche (4b) gemessen in mm2 zu dem Wert des Abstands zwischen der Lichteintritts- und Lichtaustrittsfläche (4b) gemessen in mm kleiner 2:1 ist und das Verhältnis des Wertes der Lichteintrittsfläche (4a) gemessen in mm2 zu dem Wert des Abstands zwischen der Lichteintritts- und Lichteintrittsfläche (4a) gemessen in mm kleiner 1:2 ist. 4. Light module (1) according to claim 3, characterized in that the ratio of the light entry surface (4a) to the light exit surface (4b) is between 1: 1 and 1:10, the ratio of the value of the light exit surface (4b) measured in mm 2 the value of the distance between the light entrance and exit surface (4b) measured in mm is less than 2: 1 and the ratio of the value of the light entry surface (4a) measured in mm 2 to the value of the distance between the light entry and light entry surface (4a) in mm is less than 1: 2.
5. Leuchtmodul (1) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das5. lighting module (1) according to one of claims 1 to 4, characterized in that the
Trägerelement (4) eine planparallele Platte ist, die vorzugsweise eine Dicke von zumindest 0,2 mm aufweist. Carrier element (4) is a plane-parallel plate, which preferably has a thickness of at least 0.2 mm.
6. Leuchtmodul (1) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die6. lighting module (1) according to one of claims 1 to 5, characterized in that the
Maskierung (5) aus einer Lackschicht, einem Polymer oder einer metallischen Beschichtung besteht. Masking (5) consists of a lacquer layer, a polymer or a metallic coating.
7. Leuchtmodul (1) nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die7. lighting module (1) according to one of claims 1 to 6, characterized in that the
Maskierung (5) die Lichtaustrittsfläche (4b) auf eine im Wesentlichen sechseckige geometrische Form begrenzt, welche aus einer Rechteckfläche und einer auf einer Hälfte der Rechteckfläche aufsitzenden Trapezfläche besteht, wobei eine Seitenlinie der Trapezfläche eine Seitenlinie der Rechteckfläche fluchtend verlängert. Masking (5) the light exit surface (4b) limited to a substantially hexagonal geometric shape, which consists of a rectangular surface and a seated on one half of the rectangular surface trapezoidal surface, wherein a side line of the trapezoidal surface extends a side line of the rectangular surface in alignment.
8. Fahrzeugscheinwerfer (2), insbesondere Kraftfahrzeugscheinwerfer, umfassend ein Leuchtmodul (1) gemäß einem der Ansprüche 1 bis 7 und eine Laserlichtquelle (7) zur Anregung des Leuchtelements (3). 8. A vehicle headlight (2), in particular a motor vehicle headlight, comprising a lighting module (1) according to one of claims 1 to 7 and a laser light source (7) for exciting the lighting element (3).
9. Fahrzeugscheinwerfer (2) nach Anspruch 8, wobei der Fahrzeugscheinwerfer (2) ferner eine Projektionslinse (8), insbesondere eine asphärische Projektionslinse, zur Abbildung des von dem Leuchtmodul (1) abgestrahlten Lichtes auf einen vor dem Fahrzeugscheinwerfer (2) liegenden Bereich aufweist. 9. A vehicle headlamp (2) according to claim 8, wherein the vehicle headlamp (2) further comprises a projection lens (8), in particular an aspherical projection lens for imaging the light emitted by the light module (1) on a front of the vehicle headlight (2) lying area ,
10. Fahrzeugscheinwerfer (2) nach Anspruch 9, dadurch gekennzeichnet, dass die zumindest eine Lichtaustrittsfläche (4b) des Leuchtmoduls (1) einen der Bildfeldwölbung (E) der Projektionslinse (8) angepassten Verlauf aufweist. 10. Vehicle headlight (2) according to claim 9, characterized in that the at least one light exit surface (4b) of the lighting module (1) has a curvature of the field of view (E) of the projection lens (8) adapted course.
EP16732218.9A 2015-06-30 2016-06-09 Lighting module for a vehicle headlamp Active EP3317580B1 (en)

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PCT/AT2016/050189 WO2017000005A1 (en) 2015-06-30 2016-06-09 Lighting module for a vehicle headlamp

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US20180180239A1 (en) 2018-06-28
WO2017000005A1 (en) 2017-01-05
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AT517409B1 (en) 2017-06-15
US10371335B2 (en) 2019-08-06
CN107787426B (en) 2021-01-26
JP2018519641A (en) 2018-07-19
AT517409A1 (en) 2017-01-15

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