EP3896334A1 - Lighting device for a motor vehicle headlight - Google Patents
Lighting device for a motor vehicle headlight Download PDFInfo
- Publication number
- EP3896334A1 EP3896334A1 EP20169377.7A EP20169377A EP3896334A1 EP 3896334 A1 EP3896334 A1 EP 3896334A1 EP 20169377 A EP20169377 A EP 20169377A EP 3896334 A1 EP3896334 A1 EP 3896334A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- lighting device
- guide body
- light guide
- 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.)
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Classifications
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- 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]
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- 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
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- 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
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- 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
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- 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
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- 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
- F21S41/265—Composite lenses; Lenses with a patch-like shape
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- 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 - F21S41/2805
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- 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
- F21S41/29—Attachment thereof
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- 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
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/32—Optical layout thereof
- F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
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- 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
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/40—Cooling of lighting devices
- F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/40—Cooling of lighting devices
- F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
- F21S45/48—Passive cooling, e.g. using fins, thermal conductive elements or openings with means for conducting heat from the inside to the outside of the lighting devices, e.g. with fins on the outer surface of the lighting device
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
- F21W2102/10—Arrangement or contour of the emitted light
- F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
- F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Definitions
- the invention further relates to a motor vehicle headlight with at least one lighting device according to the invention.
- Lighting devices are known from the prior art which can implement both a low beam distribution and a high beam distribution, but no further additional light distribution.
- the lighting device comprises at least one third light module with a light source for generating additional light distribution
- the light guide body of the second light module has a bottom surface facing away from the roof surface, which has a second reflective surface at least in sections
- the third light module is arranged in such a way that at least part of the generated decoupled light of the third light module can be reflected from the bottom surface of the light guide body, and wherein the projection lens is set up to image the light that can be generated by the third light module in front of the lighting device.
- an additional lighting device that is spatially separate from the lighting device is usually provided.
- lighting devices with a design that is as space-saving as possible can be implemented, since structural structures that are already present are used in the lighting device in order to enable additional light distribution.
- the roof surface and the coupling-out surface of the light guide body form a diaphragm edge in a common surface intersection line.
- the diaphragm edge has a contour to form a light-dark boundary of the low beam distribution.
- the bottom surface and the coupling-out surface of the light guide body form a lower edge in a common surface intersection line.
- the second reflective surface ends at a distance from the lower edge and releases a coupling-in area on the underside into which part of the light from the third light module can be coupled in and coupled out again via the coupling-out surface of the light guide body.
- the first reflective surface ends at a distance from the diaphragm edge and releases an upper coupling-out area from which part of the light of the third light module, which can be coupled in via the lower coupling-in area, can be coupled out.
- the light sources of the light modules are each designed as at least one light-emitting diode.
- the lighting device comprises a carrier body on which the light sources of the light modules are arranged.
- the carrier body is designed as a cooling body; the cooling body preferably comprises cooling fins.
- the carrier body comprises a third reflective surface which is arranged opposite the bottom surface of the light guide body, and wherein the third reflective surface is set up to reflect part of the light that can be generated by the third light module.
- the projection lens has a first optical axis and a first focal surface corresponding to the first optical axis.
- optical axis is the axis of symmetry of a rotationally symmetrical optical system or a projection lens. It depends on the symmetry of the surfaces, not their boundaries. Likewise, sections of an otherwise non-symmetrical lens can also have rotationally symmetrical sections to which an imaginary optical axis can be assigned.
- the projection lens has a second optical axis and a second focal surface corresponding to the second optical axis.
- the diaphragm edge of the light guide body preferably the coupling-out surface of the light guide body, is arranged in the focal surface, the first optical axis of the projection lens preferably intersecting the diaphragm edge of the light guide body.
- the second optical axis of the projection lens is arranged in the vertical direction below the light guide body.
- the object is also achieved by a motor vehicle headlight with at least one lighting device according to the invention.
- Fig. 1 shows an exemplary lighting device 10 for a motor vehicle headlight, comprising a first light module 100 with a light source 110 for generating a low beam distribution in the direction of a main emission direction, a second light module 200 for generating a high beam distribution, the second light module 200 including a light source 210 and a light guide body 220 , in which light guide body 220 light from the light source 210 can be radiated into the light guide body 220 via a coupling surface 221 and can be coupled out via a coupling surface 222 in the direction of the main emission direction.
- the light guide body 220 has a extending from the coupling surface 221 to the output surface 222 side of the roof 223, a first reflective surface 223a, wherein the light guide body 220 is disposed relative to the first lighting module 100 such that at least a part of can be generated by the first light module 100 is coupled Light is reflectable on the first reflective surface 223a.
- the lighting device 10 comprises a projection lens 500, which is set up to image the light that can be generated by the first and second light modules 100, 200 in front of the lighting device 10 , the light guide body 220 being designed in such a way that a screen for part of the light emitted by the first light module 100 can be generated for generating the low beam light distribution, is arranged between the first light module 100 and the projection lens 500.
- a projection lens 500 which is set up to image the light that can be generated by the first and second light modules 100, 200 in front of the lighting device 10 , the light guide body 220 being designed in such a way that a screen for part of the light emitted by the first light module 100 can be generated for generating the low beam light distribution, is arranged between the first light module 100 and the projection lens 500.
- the roof surface 223 and the coupling-out surface 222 of the light guide body 220 form a diaphragm edge 250 in a common surface section line, the diaphragm edge 250 having a contour to form an asymmetrical cut-off line typical for low-beam light distribution.
- the projection lens 500 has a first optical axis 510 and a first focal surface 510a corresponding to the first optical axis 510 , wherein the diaphragm edge 250 of the light guide body 220, preferably the coupling-out surface 222 of the light guide body 220, is arranged in the first focal surface 510a , preferably the first
- the optical axis 510 of the projection lens 500 intersects the diaphragm edge 250 of the light guide body 220.
- the lighting device 10 further comprises a third light module 100 with a light source for generating additional light distribution, the light guide body 220 of the second light module 200 having a bottom surface 224 facing away from the roof surface 223 , which has a second reflective surface 224a at least in sections.
- the third light module 100 is arranged in such a way that at least part of the generated decoupled light of the third light module 300 is or is reflected by the second reflective surface 224a of the light guide body 220 and is essentially deflected in the direction of the main emission direction or in the direction of the projection lens 500 will.
- the projection lens 500 is also set up to image the light that can be generated by the third light module 300 in front of the lighting device 10.
- the bottom surface 224 and the coupling-out surface 222 of the light guide body 220 form a lower edge 260 in a common surface intersection line, wherein in FIG Fig. 1
- the second reflective surface 224a ends at a distance from the lower edge 260 and exposes a coupling area 270 on the underside, into which part of the light from the third light module 300 can be coupled in and coupled out again via the coupling surface 222 of the light guide body 220.
- the lighting device 10 comprises a carrier body 400 on which the light sources of the light modules 100, 200, 300 are arranged, wherein the light sources can be designed as at least one light-emitting diode.
- the carrier body 400 is designed as a cooling body in order to dissipate the heat that can be generated by the light sources during operation.
- the carrier body 400 comprises a third reflective surface 410a, which is arranged opposite the bottom surface 224 of the light guide body 220 , and wherein the third reflective surface 410a is set up to reflect part of the light that can be generated by the third light module 300.
- Fig. 2 is essentially the example Fig. 1 shown, whereas the first reflective surface 223a ends at a distance from the screen edge 250 and releases an upper-side decoupling area 280 from which part of the light of the third Light module 300, which can be coupled in via the coupling-in area 270 on the underside, can be coupled out.
- the light that can be coupled out through the coupling-out region 280 on the top strikes a region of the first focal surface 510a, which, in a properly installed lighting device in a motor vehicle headlight, is located above the first optical axis 510 and in the light distribution shown in front of the lighting device 10 in an apron, i.e. near is imaged in the lighting device on a roadway.
- the embodiment in Fig. 1 does not have a coupling-out area on the top side, whereby the light of the third light module 300 that can be coupled out through the coupling-out surface 222 hits an area of the first focal surface 510a which, in a properly installed lighting device in a motor vehicle headlight, is located below the first optical axis 510 and in the front of the Lighting device 10 mapped light distribution is mapped, for example, as a so-called sign light light distribution.
- Fig. 3 is similar to the examples in Figs. 1 and 2 , wherein the projection lens 500 is designed as a bifocal projection lens with a second optical axis 520 and a second focal surface 520a corresponding to the second optical axis 520 , and wherein the second optical axis 520 of the projection lens 500 is arranged in the vertical direction below the light guide body 220 .
- the third light module 300 which is also deflected by the second and third reflective surface, hits an area below the second optical axis 520.
- a further diaphragm 290 is provided, which extends in the vertical direction and shades light which would strike an area above the second optical axis 520.
- FIG. 11 shows a further exemplary embodiment, the above statements essentially also being valid for this example, with a projection lens also being included, which, however, in FIG Fig. 4 is not drawn.
- the second reflective surface is divided into two separate partial areas, the area separating the two parts being part of the light guide body 220 .
- the high beam distribution imaged in front of the lighting device 10 can be widened in the horizontal direction.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Beleuchtungsvorrichtung (10) für einen Kraftfahrzeugscheinwerfer, umfassend:- ein erstes Lichtmodul (100) zur Erzeugung einer Abblendlichtverteilung,- ein zweites Lichtmodul (200) zur Erzeugung einer Fernlichtverteilung mit einem Lichtleitkörper (220), in welchen Lichtleitkörper (220) Licht über eine Einkoppelfläche (221) einstrahlbar ist und über eine Auskoppelfläche (222) auskoppelbar ist,wobei der Lichtleitkörper (220) auf einer Dachseite (223) eine erste reflektierende Oberfläche (223a) aufweist, und- eine Projektionslinse (500), welche eingerichtet ist, das von dem ersten und zweiten Lichtmodul (100, 200) erzeugbare Licht vor der Beleuchtungsvorrichtung (10) abzubilden,wobei der Lichtleitkörper (220) dergestalt ausgebildet ist, dass eine Blende für einen Teil des Lichtes, welches von dem ersten Lichtmodul (100) erzeugbar ist, zwischen dem ersten Lichtmodul (100) und der Projektionslinse (500) angeordnet ist, wobei die Beleuchtungsvorrichtung (10) ein drittes Lichtmodul (300) zur Erzeugung einer Zusatzlichtverteilung umfasst, und wobei der Lichtleitkörper (220) eine Bodenfläche (224) aufweist, welche eine zweite reflektierende Oberfläche (224a) aufweist,wobei das dritte Lichtmodul (300) derart angeordnet ist, dass ein Teil des von der zweiten reflektierenden Oberfläche (224a) reflektierbar ist.Lighting device (10) for a motor vehicle headlight, comprising: - a first light module (100) for generating a low beam distribution, - a second light module (200) for generating high beam distribution with a light guide body (220) in which light guide body (220) light via a coupling surface (221) can be irradiated and can be coupled out via a coupling-out surface (222), the light guide body (220) having a first reflecting surface (223a) on a roof side (223), and a projection lens (500) which is set up by the first and second light module (100, 200) generate light in front of the lighting device (10), wherein the light guide body (220) is designed such that a screen for part of the light that can be generated by the first light module (100), is arranged between the first light module (100) and the projection lens (500), the lighting device (10) having a third light module (300) for the E comprises generating an additional light distribution, and wherein the light guide body (220) has a bottom surface (224) which has a second reflective surface (224a), wherein the third light module (300) is arranged in such a way that part of the light from the second reflective surface ( 224a) is reflective.
Description
Die Erfindung betrifft eine Beleuchtungsvorrichtung für einen Kraftfahrzeugscheinwerfer, umfassend:
- zumindest ein erstes Lichtmodul mit zumindest einer Lichtquelle zur Erzeugung einer Abblendlichtverteilung in Richtung einer Hauptabstrahlrichtung,
- zumindest ein zweites Lichtmodul zur Erzeugung einer Fernlichtverteilung, wobei das zweite Lichtmodul zumindest eine Lichtquelle und einen Lichtleitkörper umfasst, in welchen Lichtleitkörper Licht der Lichtquelle über eine Einkoppelfläche in den Lichtleitkörper einstrahlbar ist und über eine Auskoppelfläche in Richtung der Hauptabstrahlrichtung auskoppelbar ist,
wobei der Lichtleitkörper auf einer von der Einkoppelfläche bis zur Auskoppelfläche erstreckende Dachseite eine erste reflektierende Oberfläche aufweist und der Lichtleitkörper relativ zum ersten Lichtmodul derart angeordnet ist, dass zumindest ein Teil des von dem ersten Lichtmodul erzeugbaren ausgekoppelten Lichts an der ersten reflektierenden Oberfläche reflektierbar ist, und - zumindest eine Projektionslinse, welche eingerichtet ist, das von dem ersten und zweiten Lichtmodul erzeugbare Licht vor der Beleuchtungsvorrichtung abzubilden,
wobei der Lichtleitkörper dergestalt ausgebildet ist, dass eine Blende für einen Teil des Lichtes, welches von dem ersten Lichtmodul zur Erzeugung der Abblendlichtverteilung erzeugbar ist, zwischen dem ersten Lichtmodul und der Projektionsoptik angeordnet ist.
- at least one first light module with at least one light source for generating a low beam distribution in the direction of a main emission direction,
- at least one second light module for generating a high beam distribution, wherein the second light module comprises at least one light source and a light guide body, in which light guide body light from the light source can be radiated into the light guide body via a coupling surface and can be coupled out via a coupling surface in the direction of the main emission direction,
wherein the light guide body has a first reflective surface on a roof side extending from the coupling surface to the coupling out surface and the light guide body is arranged relative to the first light module in such a way that at least part of the light that can be generated by the first light module can be reflected on the first reflective surface, and - at least one projection lens which is set up to image the light that can be generated by the first and second light module in front of the lighting device,
wherein the light guide body is designed in such a way that a screen for part of the light that can be generated by the first light module for generating the low beam light distribution is arranged between the first light module and the projection optics.
Die Erfindung betrifft weiters einen Kraftfahrzeugscheinwerfer mit zumindest einer erfindungsgemäßen Beleuchtungsvorrichtung.The invention further relates to a motor vehicle headlight with at least one lighting device according to the invention.
Üblicherweise werden in Kraftfahrzeugscheinwerfern mehrere Beleuchtungsvorrichtungen verbaut, welche jeweils für eine Abblendlichtverteilung, Fernlichtverteilung und eine Zusatzlichtverteilung, wie eine Sign-Light-Lichtverteilung, vorgesehen ist. Dadurch, dass diese drei Beleuchtungsvorrichtung voneinander räumlich getrennt zur Verfügung stehen und auch getrennt verbaut werden, ist ein enormer Bauraum in einem Kraftfahrzeugscheinwerfer notwendig.Usually, several lighting devices are installed in motor vehicle headlights, each of which is provided for low beam distribution, high beam distribution and additional light distribution, such as sign light distribution. Because these three lighting devices are available spatially separated from one another and can also be installed separately, an enormous amount of space is required in a motor vehicle headlight.
Aus dem Stand der Technik sind Beleuchtungsvorrichtungen bekannt, welche sowohl eine Abblendlichtverteilung als auch eine Fernlichtverteilung, jedoch keine weitere Zusatzlichtverteilung umsetzen können.Lighting devices are known from the prior art which can implement both a low beam distribution and a high beam distribution, but no further additional light distribution.
Es ist eine Aufgabe der Erfindung eine verbesserte Beleuchtungsvorrichtung bereitzustellen.It is an object of the invention to provide an improved lighting device.
Diese Aufgabe wird dadurch gelöst, dass die Beleuchtungsvorrichtung zumindest ein drittes Lichtmodul mit einer Lichtquelle zur Erzeugung einer Zusatzlichtverteilung umfasst, und wobei der Lichtleitkörper des zweiten Lichtmoduls eine der Dachfläche abgewandten Bodenfläche aufweist, welche zumindest abschnittsweise eine zweite reflektierende Oberfläche aufweist,
wobei das dritte Lichtmodul derart angeordnet ist, dass zumindest ein Teil des erzeugbaren ausgekoppelten Lichtes des dritten Lichtmoduls von der Bodenfläche des Lichtleitkörper reflektierbar ist,
und wobei die Projektionslinse eingerichtet ist, das von dem dritten Lichtmodul erzeugbare Licht vor der Beleuchtungsvorrichtung abzubilden.This object is achieved in that the lighting device comprises at least one third light module with a light source for generating additional light distribution, and wherein the light guide body of the second light module has a bottom surface facing away from the roof surface, which has a second reflective surface at least in sections,
wherein the third light module is arranged in such a way that at least part of the generated decoupled light of the third light module can be reflected from the bottom surface of the light guide body,
and wherein the projection lens is set up to image the light that can be generated by the third light module in front of the lighting device.
Zur Realisierung der Zusatzlichtverteilung ist üblicherweise eine von der Beleuchtungsvorrichtung räumlich getrennte Zusatzbeleuchtungsvorrichtung vorgesehen. Mit einer erfindungsgemäßen Beleuchtungsvorrichtung lassen sich Beleuchtungsvorrichtungen mit einem möglichst platzsparenden Design verwirklichen, da bereits vorhandene bauliche Strukturen in der Beleuchtungsvorrichtung verwendet werden, um eine Zusatzlichtverteilung zu ermöglichen.To implement the additional light distribution, an additional lighting device that is spatially separate from the lighting device is usually provided. With a lighting device according to the invention, lighting devices with a design that is as space-saving as possible can be implemented, since structural structures that are already present are used in the lighting device in order to enable additional light distribution.
Generell wird im Weiteren die Zuordnung der Begriffe hinsichtlich eines Ortes oder einer Orientierung, wie beispielsweise "horizontal", "vertikal", "in horizontaler Richtung", "in vertikaler Richtung", "oben", "unten", "vorne", "hinten", "darunter", "darüber" etc. lediglich zur Vereinfachung gewählt und diese Begriffe beziehen sich einerseits auf die Darstellung in den Zeichnungen und darüber hinaus auf eine in einem Kraftfahrzeugscheinwerfer, welcher in einem Kraftfahrzeug verbaut ist, ordnungsgemäß eingebaute Beleuchtungsvorrichtung.In general, the assignment of the terms with regard to a location or an orientation, such as "horizontal", "vertical", "in the horizontal direction", "in the vertical direction", "above", "below", "in front", " behind "," below "," above "etc. are chosen only for the sake of simplicity and these terms relate on the one hand to the representation in the drawings and, on the other hand, to one in one Motor vehicle headlight, which is installed in a motor vehicle, properly installed lighting device.
Es kann vorgesehen sein, dass die Dachfläche und die Auskoppelfläche des Lichtleitkörpers in einer gemeinsamen Flächenschnittlinie eine Blendenkante ausbilden.It can be provided that the roof surface and the coupling-out surface of the light guide body form a diaphragm edge in a common surface intersection line.
Es kann vorgesehen sein, dass die Blendenkante eine Kontur zur Bildung einer Hell-Dunkel-Grenze der Abblendlichtverteilung aufweist.It can be provided that the diaphragm edge has a contour to form a light-dark boundary of the low beam distribution.
Es kann vorgesehen sein, dass die Bodenfläche und die Auskoppelfläche des Lichtleitkörper in einer gemeinsamen Flächenschnittlinie eine Unterkante ausbilden.It can be provided that the bottom surface and the coupling-out surface of the light guide body form a lower edge in a common surface intersection line.
Es kann vorgesehen sein, dass die zweite reflektierende Oberfläche mit einem Abstand von der Unterkante endet und einen unterseitigen Einkoppelbereich freigibt, in den ein Teil des Lichtes des dritten Lichtmoduls einkoppelbar und über die Auskoppelfläche des Lichtleitkörper wieder auskoppelbar ist.It can be provided that the second reflective surface ends at a distance from the lower edge and releases a coupling-in area on the underside into which part of the light from the third light module can be coupled in and coupled out again via the coupling-out surface of the light guide body.
Es kann vorgesehen sein, dass die erste reflektierende Oberfläche mit einem Abstand von der Blendenkante endet und einen oberseitigen Auskoppelbereich freigibt, aus dem ein Teil des Lichtes des dritten Lichtmoduls, welches über den unterseitigen Einkoppelbereich einkoppelbar ist, auskoppelbar ist.It can be provided that the first reflective surface ends at a distance from the diaphragm edge and releases an upper coupling-out area from which part of the light of the third light module, which can be coupled in via the lower coupling-in area, can be coupled out.
Es kann vorgesehen sein, dass die Lichtquellen der Lichtmodule jeweils als zumindest eine Leuchtdiode ausgebildet sind.It can be provided that the light sources of the light modules are each designed as at least one light-emitting diode.
Es kann vorgesehen sein, dass die Beleuchtungsvorrichtung einen Trägerkörper umfasst, an welchem die Lichtquellen der Lichtmodule angeordnet sind.It can be provided that the lighting device comprises a carrier body on which the light sources of the light modules are arranged.
Es kann vorgesehen sein, dass der Trägerkörper als Kühlkörper ausgebildet ist, vorzugsweise umfasst der Kühlkörper Kühlrippen.It can be provided that the carrier body is designed as a cooling body; the cooling body preferably comprises cooling fins.
Es kann vorgesehen sein, dass der Trägerkörper eine dritte reflektierende Oberfläche umfasst, welche der Bodenfläche des Lichtleitkörpers gegenüberliegend angeordnet ist, und wobei die dritte reflektierende Oberfläche eingerichtet ist, einen Teil des von dem dritten Lichtmodul erzeugbaren Lichts zu reflektieren.It can be provided that the carrier body comprises a third reflective surface which is arranged opposite the bottom surface of the light guide body, and wherein the third reflective surface is set up to reflect part of the light that can be generated by the third light module.
Es kann vorgesehen sein, dass die Projektionslinse eine erste optische Achse und eine zur ersten optischen Achse korrespondierenden erste Brennfläche aufweist.It can be provided that the projection lens has a first optical axis and a first focal surface corresponding to the first optical axis.
Als "optische Achse" bezeichnet man die Symmetrieachse eines rotationssymmetrischen optischen Systems bzw. einer Projektionslinse. Dabei kommt es auf die Symmetrie der Flächen an, nicht ihre Berandung. Ebenso können auch Ausschnitte einer ansonsten nicht symmetrischen Linse rotationssymmetrische Abschnitte aufweisen, welchen eine gedachte optische Achse zugeordnet werden kann.The "optical axis" is the axis of symmetry of a rotationally symmetrical optical system or a projection lens. It depends on the symmetry of the surfaces, not their boundaries. Likewise, sections of an otherwise non-symmetrical lens can also have rotationally symmetrical sections to which an imaginary optical axis can be assigned.
Es kann vorgesehen sein, dass die Projektionslinse eine zweite optische Achse und eine zur zweiten optischen Achse korrespondierenden zweite Brennfläche aufweist.It can be provided that the projection lens has a second optical axis and a second focal surface corresponding to the second optical axis.
Es kann vorgesehen sein, dass die Blendenkante des Lichtleitkörpers, vorzugsweise die Auskoppelfläche des Lichtleitkörpers, in der Brennfläche angeordnet ist, wobei vorzugsweise die erste optische Achse der Projektionslinse die Blendenkante des Lichtleitkörpers schneidet.It can be provided that the diaphragm edge of the light guide body, preferably the coupling-out surface of the light guide body, is arranged in the focal surface, the first optical axis of the projection lens preferably intersecting the diaphragm edge of the light guide body.
Es kann vorgesehen sein, dass die zweite optische Achse der Projektionslinse in vertikaler Richtung unterhalb des Lichtleitkörpers angeordnet ist.It can be provided that the second optical axis of the projection lens is arranged in the vertical direction below the light guide body.
Die Aufgabe wird ebenso durch einen Kraftfahrzeugscheinwerfer mit zumindest einer erfindungsgemäßen Beleuchtungsvorrichtung gelöst.The object is also achieved by a motor vehicle headlight with at least one lighting device according to the invention.
Nachfolgend wird die Erfindung anhand von beispielhaften Zeichnungen näher erläutert. Hierbei zeigt
- Fig. 1
- eine beispielhafte Beleuchtungsvorrichtung in einer Seitenansicht,
- Fig. 2
- eine weitere beispielhafte Beleuchtungsvorrichtung in einer Seitenansicht,
- Fig. 3
- ein weiteres Beispiel einer Beleuchtungsvorrichtung in einer Seitenansicht, und
- Fig. 4
- ein weiteres Beispiel einer Beleuchtungsvorrichtung in einer perspektivischen Ansicht.
- Fig. 1
- an exemplary lighting device in a side view,
- Fig. 2
- a further exemplary lighting device in a side view,
- Fig. 3
- a further example of a lighting device in a side view, and
- Fig. 4
- a further example of a lighting device in a perspective view.
Der Lichtleitkörper 220 weist auf einer sich von der Einkoppelfläche 221 bis zur Auskoppelfläche 222 erstreckende Dachseite 223 eine erste reflektierende Oberfläche 223a auf, wobei der Lichtleitkörper 220 relativ zum ersten Lichtmodul 100 derart angeordnet ist, dass zumindest ein Teil des von dem ersten Lichtmodul 100 erzeugbaren ausgekoppelten Lichts an der ersten reflektierenden Oberfläche 223a reflektierbar ist.The
Ferner umfasst die Beleuchtungsvorrichtung 10 eine Projektionslinse 500, welche eingerichtet ist, das von dem ersten und zweiten Lichtmodul 100, 200 erzeugbare Licht vor der Beleuchtungsvorrichtung 10 abzubilden, wobei der Lichtleitkörper 220 dergestalt ausgebildet ist, dass eine Blende für einen Teil des Lichtes, welches von dem ersten Lichtmodul 100 zur Erzeugung der Abblendlichtverteilung erzeugbar ist, zwischen dem ersten Lichtmodul 100 und der Projektionslinse 500 angeordnet ist.Furthermore, the
Hierzu bildet die Dachfläche 223 und die Auskoppelfläche 222 des Lichtleitkörpers 220 in einer gemeinsamen Flächenschnittlinie eine Blendenkante 250 aus, wobei die Blendenkante 250 eine Kontur zur Bildung einer für die Abblendlichtverteilung typischen asymmetrische Hell-Dunkel-Grenze aufweist.For this purpose, the
Die Projektionslinse 500 weist eine erste optische Achse 510 und eine zur ersten optischen Achse 510 korrespondierende erste Brennfläche 510a auf, wobei die Blendenkante 250 des Lichtleitkörpers 220, vorzugsweise die Auskoppelfläche 222 des Lichtleitkörpers 220, in der ersten Brennfläche 510a angeordnet ist, wobei vorzugsweise die erste optische Achse 510 der Projektionslinse 500 die Blendenkante 250 des Lichtleitkörpers 220 schneidet.The
Die Beleuchtungsvorrichtung 10 umfasst weiters ein drittes Lichtmodul 100 mit einer Lichtquelle zur Erzeugung einer Zusatzlichtverteilung, wobei der Lichtleitkörper 220 des zweiten Lichtmoduls 200 eine der Dachfläche 223 abgewandten Bodenfläche 224 aufweist, welche zumindest abschnittsweise eine zweite reflektierende Oberfläche 224a aufweist.The
Das dritte Lichtmodul 100 ist dabei derart angeordnet, dass zumindest ein Teil des erzeugbaren ausgekoppelten Lichtes des dritten Lichtmoduls 300 von der zweiten reflektierenden Oberfläche 224a des Lichtleitkörpers 220 reflektierbar ist bzw. reflektiert wird und im Wesentlichen in Richtung Hauptabstrahlrichtung bzw. in Richtung der Projektionslinse 500 umgelenkt wird. Die Projektionslinse 500 ist hierfür ebenfalls eingerichtet, das von dem dritten Lichtmodul 300 erzeugbare Licht vor der Beleuchtungsvorrichtung 10 abzubilden.The
Ferner bildet die Bodenfläche 224 und die Auskoppelfläche 222 des Lichtleitkörpers 220 in einer gemeinsamen Flächenschnittlinie eine Unterkante 260 aus, wobei im in
Überdies umfasst die Beleuchtungsvorrichtung 10 einen Trägerkörper 400, an welchem die Lichtquellen der Lichtmodule 100, 200, 300 angeordnet sind, wobei die Lichtquellen als zumindest eine Leuchtdiode ausgebildet sein können. Hierfür kann vorgesehen sein, dass der Trägerkörper 400 als Kühlkörper ausgebildet ist, um die von den Lichtquellen erzeugbare Wärme im Betrieb abzuführen.In addition, the
Der Trägerkörper 400 umfasst in den gezeigten Beispielen eine dritte reflektierende Oberfläche 410a, welche der Bodenfläche 224 des Lichtleitkörpers 220 gegenüberliegend angeordnet ist, und wobei die dritte reflektierende Oberfläche 410a eingerichtet ist, einen Teil des von dem dritten Lichtmodul 300 erzeugbaren Lichts zu reflektieren.In the examples shown, the
In
Das Ausführungsbeispiel in
Claims (15)
wobei der Lichtleitkörper (220) auf einer sich von der Einkoppelfläche (221) bis zur Auskoppelfläche (222) erstreckende Dachseite (223) eine erste reflektierende Oberfläche (223a) aufweist und der Lichtleitkörper (220) relativ zum ersten Lichtmodul (100) derart angeordnet ist, dass zumindest ein Teil des von dem ersten Lichtmodul (100) erzeugbaren ausgekoppelten Lichts an der ersten reflektierenden Oberfläche (223a) reflektierbar ist, und
wobei der Lichtleitkörper (220) dergestalt ausgebildet ist, dass eine Blende für einen Teil des Lichtes, welches von dem ersten Lichtmodul (100) zur Erzeugung der Abblendlichtverteilung erzeugbar ist, zwischen dem ersten Lichtmodul (100) und der Projektionslinse (500) angeordnet ist,
dadurch gekennzeichnet, dass
die Beleuchtungsvorrichtung (10) zumindest ein drittes Lichtmodul (300) mit einer Lichtquelle zur Erzeugung einer Zusatzlichtverteilung umfasst, und wobei der Lichtleitkörper (220) des zweiten Lichtmoduls (200) eine der Dachfläche (223) abgewandten Bodenfläche (224) aufweist, welche zumindest abschnittsweise eine zweite reflektierende Oberfläche (224a) aufweist,
wobei das dritte Lichtmodul (300) derart angeordnet ist, dass zumindest ein Teil des erzeugbaren ausgekoppelten Lichtes des dritten Lichtmoduls (300) von der zweiten reflektierenden Oberfläche (224a) des Lichtleitkörpers (220) reflektierbar ist,
und wobei die Projektionslinse (500) eingerichtet ist, das von dem dritten Lichtmodul (300) erzeugbare Licht vor der Beleuchtungsvorrichtung (10) abzubilden.
wherein the light guide body (220) has a first reflective surface (223a) on a roof side (223) extending from the coupling surface (221) to the decoupling surface (222) and the light guide body (220) is arranged in this way relative to the first light module (100) that at least part of the coupled-out light that can be generated by the first light module (100) is reflectable on the first reflective surface (223a), and
wherein the light guide body (220) is designed in such a way that a screen for part of the light that can be generated by the first light module (100) to generate the low beam light distribution is arranged between the first light module (100) and the projection lens (500),
characterized in that
the lighting device (10) comprises at least one third light module (300) with a light source for generating additional light distribution, and wherein the light guide body (220) of the second light module (200) has a bottom surface (224) facing away from the roof surface (223), which at least in sections has a second reflective surface (224a),
wherein the third light module (300) is arranged in such a way that at least part of the generated decoupled light of the third light module (300) can be reflected by the second reflective surface (224a) of the light guide body (220),
and wherein the projection lens (500) is set up to image the light that can be generated by the third light module (300) in front of the lighting device (10).
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20169377.7A EP3896334A1 (en) | 2020-04-14 | 2020-04-14 | Lighting device for a motor vehicle headlight |
PCT/EP2021/056849 WO2021209220A1 (en) | 2020-04-14 | 2021-03-17 | Illumination device for a motor vehicle headlight |
KR1020217033102A KR102660198B1 (en) | 2020-04-14 | 2021-03-17 | Lighting devices for automobile headlamps |
EP21711907.2A EP4136383B1 (en) | 2020-04-14 | 2021-03-17 | Lighting device for a motor vehicle headlight |
US17/605,153 US11698175B2 (en) | 2020-04-14 | 2021-03-17 | Lighting device for a motor vehicle headlight |
JP2022504147A JP7342240B2 (en) | 2020-04-14 | 2021-03-17 | Illumination device for automobile floodlights |
CN202180002884.2A CN113825948B (en) | 2020-04-14 | 2021-03-17 | Lighting device for motor vehicle headlight |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20169377.7A EP3896334A1 (en) | 2020-04-14 | 2020-04-14 | Lighting device for a motor vehicle headlight |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3896334A1 true EP3896334A1 (en) | 2021-10-20 |
Family
ID=70289550
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20169377.7A Withdrawn EP3896334A1 (en) | 2020-04-14 | 2020-04-14 | Lighting device for a motor vehicle headlight |
EP21711907.2A Active EP4136383B1 (en) | 2020-04-14 | 2021-03-17 | Lighting device for a motor vehicle headlight |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21711907.2A Active EP4136383B1 (en) | 2020-04-14 | 2021-03-17 | Lighting device for a motor vehicle headlight |
Country Status (6)
Country | Link |
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US (1) | US11698175B2 (en) |
EP (2) | EP3896334A1 (en) |
JP (1) | JP7342240B2 (en) |
KR (1) | KR102660198B1 (en) |
CN (1) | CN113825948B (en) |
WO (1) | WO2021209220A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP7528486B2 (en) * | 2020-03-23 | 2024-08-06 | 市光工業株式会社 | Vehicle lighting fixtures |
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US20170227184A1 (en) * | 2014-08-07 | 2017-08-10 | Koito Manufacturing Co., Ltd. | Vehicle lamp |
JP6605252B2 (en) * | 2014-08-08 | 2019-11-13 | 株式会社小糸製作所 | Vehicle lighting |
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JP2017212168A (en) | 2016-05-27 | 2017-11-30 | 株式会社小糸製作所 | Vehicular lighting fixture |
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JP6855404B2 (en) * | 2018-03-16 | 2021-04-07 | 株式会社豊田自動織機 | Vehicle lighting |
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2020
- 2020-04-14 EP EP20169377.7A patent/EP3896334A1/en not_active Withdrawn
-
2021
- 2021-03-17 JP JP2022504147A patent/JP7342240B2/en active Active
- 2021-03-17 KR KR1020217033102A patent/KR102660198B1/en active Active
- 2021-03-17 EP EP21711907.2A patent/EP4136383B1/en active Active
- 2021-03-17 WO PCT/EP2021/056849 patent/WO2021209220A1/en active Application Filing
- 2021-03-17 CN CN202180002884.2A patent/CN113825948B/en active Active
- 2021-03-17 US US17/605,153 patent/US11698175B2/en active Active
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WO2013075157A1 (en) * | 2011-11-22 | 2013-05-30 | Zizala Lichtsysteme Gmbh | Led projection module |
JP2016039020A (en) * | 2014-08-07 | 2016-03-22 | 株式会社小糸製作所 | Vehicular lighting fixture |
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Also Published As
Publication number | Publication date |
---|---|
US20220307665A1 (en) | 2022-09-29 |
JP7342240B2 (en) | 2023-09-11 |
KR20210134977A (en) | 2021-11-11 |
KR102660198B1 (en) | 2024-04-24 |
EP4136383A1 (en) | 2023-02-22 |
WO2021209220A1 (en) | 2021-10-21 |
JP2022541313A (en) | 2022-09-22 |
CN113825948B (en) | 2024-07-26 |
US11698175B2 (en) | 2023-07-11 |
CN113825948A (en) | 2021-12-21 |
EP4136383B1 (en) | 2024-06-05 |
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