EP3356728B1 - Lighting device for a motor vehicle headlight - Google Patents
Lighting device for a motor vehicle headlight Download PDFInfo
- Publication number
- EP3356728B1 EP3356728B1 EP16760640.9A EP16760640A EP3356728B1 EP 3356728 B1 EP3356728 B1 EP 3356728B1 EP 16760640 A EP16760640 A EP 16760640A EP 3356728 B1 EP3356728 B1 EP 3356728B1
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- EP
- European Patent Office
- Prior art keywords
- light
- outcoupling
- lighting device
- bars
- guide unit
- 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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- 238000009826 distribution Methods 0.000 claims description 32
- 230000008878 coupling Effects 0.000 claims description 11
- 238000010168 coupling process Methods 0.000 claims description 11
- 238000005859 coupling reaction Methods 0.000 claims description 11
- 239000007787 solid Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000005286 illumination Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
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]
- F21S41/151—Light emitting diodes [LED] arranged in one or more lines
- F21S41/153—Light emitting diodes [LED] arranged in one or more lines arranged in a matrix
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—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
- F21S41/29—Attachment thereof
-
- 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
-
- 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
- F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
- F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
- F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
- F21S41/141—Light emitting diodes [LED]
- F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- 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
-
- 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
- F21Y2105/00—Planar light sources
- F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
Definitions
- the invention relates to a lighting device for a motor vehicle headlight, comprising a first light guide unit with a holding web and at least two mutually spaced from the retaining web projecting outcoupling webs, a second light guide unit with a holding web and at least one protruding from the retaining web outcoupling web, a number of light sources for coupling of light in the decoupling webs of the light guide units, wherein each decoupling web at least one light source is assigned, and at least one of the light guide units downstream lens, preferably a projection lens, for generating a defined light distribution, each decoupling web has a light outcoupling surface for emitting light into the at least one lens, wherein the first and the second light guide unit are separate from one another, which are arranged in such a way that between adjacent coupling In each case a decoupling web of the second light guide unit is arranged in each of the first light guide unit.
- the invention relates to motor vehicle headlights having at least one lighting device according to the invention and a motor vehicle having at least one, preferably two lighting devices and / or motor vehicle headlights.
- Input lighting devices are used in light modules for motor vehicle headlights for generating light distributions, for example for producing segmented light distributions, i. of light distributions made up of individual light segments.
- a light segment can be illuminated, for example, by activating a light source, which light source is associated with a decoupling ridge, wherein the light coupled into the decoupling ridge is transmitted via a downstream lens as a light segment, e.g. is imaged on a lying in front of the lighting device area, such as a roadway.
- the document AT 514705 A4 also discloses a headlamp with known light guide units as intent optics in combination with a projection lens.
- a shutter is arranged, which is adapted to limit the radiated from the coupling bars in the direction of the lens ⁇ exiting light in such a way that the light emitted by the illumination device light distribution through a single continuous rectilinear lower edge, preferably in the form of a horizontal line, down is limited.
- the invention positioning errors of the light guide units in the vertical direction can be compensated, so that the light distribution emitted by the lighting device is limited by a single, sharp, continuous lower edge.
- the lower edge is located, for example, 2 ° below the horizontal line of the light distribution.
- the first and / or the second light guide unit need not be made in one piece, but may also be composed of a plurality of light guide units.
- the aperture is made of opaque material.
- the illumination device is preferably configured to generate a low beam distribution or a high beam distribution, in particular an adaptive low beam distribution or high beam distribution.
- each light-guiding unit is assigned only one coupling-out web.
- the provision of holding webs could be dispensed with in such an arrangement.
- the aperture would show the same effect mentioned above, however, the production cost of implementing such an arrangement is disproportionately high.
- the diaphragm has a horizontal edge for limiting the light distribution.
- the aperture has an opening through which light is guided by the coupling webs into the lens, wherein in the installed state, an upper side of the opening is bounded by a horizontally extending edge.
- the aperture can be made in one piece.
- the first light guide unit always has a coupling web more than the second light guide unit. As the number of decoupling lands increases, it is possible to achieve a finer-resolution segmentation of the light distribution.
- the first and the second light guide unit have an equal number of coupling-out webs.
- the first light guide unit has a number of n protruding from the retaining web outcoupling webs
- first and / or the second light guide unit are designed as transparent solid body.
- the light pipe within the solid body is made by total reflection along its walls.
- the first and / or the second light guide unit are designed as light-conducting hollow body.
- each outgoer can be associated with two or more LEDs.
- Another aspect of the invention relates to a motor vehicle headlight with at least one lighting device according to the invention and a motor vehicle, comprising at least one, preferably two lighting devices according to the invention and / or motor vehicle headlights.
- FIG. 1 shows a schematic representation of a lighting device 1 according to the prior art.
- the lighting device 1 is suitable for use in a motor vehicle headlight and has a first light guide unit 2 and a second light guide unit 3, wherein in the perspective shown the first light guide unit 2 almost completely covers the second light guide unit 3.
- the light guide units 2 and 3 are set up to introduce light, which is coupled via upstream light sources 4 into the light guide unit 2 or 3, into a downstream lens 5.
- the light guide units 2 and 3 are aligned with the optical axis OA of the lens 5, respectively, to irradiate light into the lens 5. Due to various assembly inaccuracies and / or manufacturing tolerances, in the discussion of the FIGS. 3 to 6 will be discussed in more detail, the light guide units 2 and 3 according to the present case in the vertical direction to each other in a manner that leads to gradations of a lower edge of the light distribution of the light image generated by the lighting device.
- the second light guide unit 3 has an offset upwards and the first light guide unit 2 has an offset downwards, whereby an edge beam L3 decoupled by the second light guide unit 3 has an offset to the edge beam L2 coupled out by the first light guide unit.
- An edge beam designates a light beam which lies in the outermost edge region of the solid angle illuminated by a light guide unit 3 and thus defines the limit of the light distribution. All directional information refers to the lighting device when assembled, unless stated otherwise.
- FIG. 1a shows a detailed representation of the staggered light guide units 2 and 3 and the exemplary marginal rays L2 and L3.
- FIG. 2 shows the effects of the offset of the light guide units 2 and 3 to each other.
- the first light guide unit 2 images individual light segments 6a; the remaining light segments 6b originate from the second light guide unit 3.
- the offset of the two light guide units 2 and 3 relative to one another leads to a vertical offset of the lower photo edges LBK-L2 and LBK-L3 relative to each other.
- the light distribution emitted by the illumination device 1 has a lower edge which delimits the light distribution and which runs in a stepped manner, in particular in accordance with a rectangular function.
- FIG. 3 shows an exploded view of the lighting device 1, wherein the light sources 4 are arranged on a support element 8.
- the carrier element 8 can be inserted into a holding device 9, which in turn is adapted to receive the light guiding units 2 and 3.
- the mounting device 9 has for this purpose recesses 9 a, the are limited by guide walls 9b, wherein the light guide units 2 and 3 can be held in the recesses 9a.
- the recesses 9a are typically dimensioned slightly larger than the corresponding dimensions of Light guide units 2 and 3. Consequently, the light guide units 2 and 3 are held with a certain play within the recess 9a, which may result in uncertainties in the positioning of the light guide units 2 and 3.
- the first light guide unit 2 has a holding web 2a, projecting from the three coupling webs 2b.
- the second light guide unit 3 likewise has a holding web 3a, from which two outcoupling webs 2b protrude, wherein each outcoupling web 2b or 3b is assigned two light sources 4 in the present case.
- Each of the in FIG. 2 Segments 6a and 6b shown are generated by the light sources 4, which couple light into the respective outgoer 2b or 3b, by the coupled light leaves the outgoe 2b and 3b respectively through respective light outcoupling surfaces 2c and 3c and through the downstream lens 5 (see Fig. 1 ) is projected onto a lying in front of the lighting device 1 area.
- FIG. 4 shows the components of the Fig. 3 in an assembled state, wherein the light guide units 2 and 3 by an in FIG. 3 not shown on the mounting device 9 clamped cover 10 is secured against slipping out of the recess 9a.
- FIGS. 5 and 6 show a plan view of the light guide units 2 and 3 and their light-outcoupling surfaces 2c and 3c, which are bounded in the vertical direction by a dashed line indicated lower edge UK and an upper edge OK.
- the fact that the lower edge UK is located at the light extraction surfaces above the upper edge OK is due to the inversion of the light distribution by the downstream lens 5.
- the first and second light guide units 2 and 3 are arranged in a target position so that the upper and lower edges OK and UK of the light exit surfaces 2c and 3c are aligned with each other.
- the vertical distances to the guide walls 9b of the mounting device 9 are the desired lengths a1 and a2.
- the light guide units 2 and 3 are as shown in FIGS. 1 to 2 shifted to each other, wherein the distances a1 'and a2' to the side walls 9b with respect to the distances a1 and a2 are significantly reduced.
- the upper and lower edges are OK and UK in contrast to the arrangement of FIG. 5 no longer aligned with each other but follow a course in the form of a rectangular function, as already FIG. 2 has been described.
- FIG. 7 shows a sectional view of an embodiment according to the invention of a lighting device 1a, which differs from lighting device according to the FIGS. 1 to 4 and 5, 6 differs in that between the lens 5 and the light-outcoupling surfaces 2c and 3c of the decoupling webs 2b, 3b, a diaphragm 11 is arranged.
- the diaphragm 11 is configured to limit the light coupled into the lens 5 by the coupling-out webs 2b, 3b in such a way that the light distribution emitted by the lighting device 1a-that is, the light distribution passing through the light-emitting sources 4 through the light-outcoupling surfaces 2c and 3c Lens 5 is generated - by a single continuous rectilinear lower edge UK, preferably in the form of a horizontal line, is limited downwards.
- the diaphragm 11 has an opening 11a, through which light from the coupling webs 2b and 3b is led into the lens 5, wherein in the installed state, an upper side of the opening 11a is bounded by a horizontally extending edge 11b (see FIG. 9 ).
- the aperture is arranged between the light-outcoupling surfaces 2c and 3c and the lens 5 in such a way that the solid angle which can be illuminated from the outcoupling surfaces to the lens 5 is trimmed upwards, which in the present example results in that previously described edge beam L3 is blocked by the aperture 11 (for example by absorption or reflection) and does not reach the downstream lens 5.
- the area of the light output surfaces 2c and 3c, which can irradiate into the lens 5, be limited to a common solid angle.
- FIG. 7a shows a detailed representation of the FIG. 7 , in which the course of the marginal rays L2 and L3 is particularly well recognizable.
- FIG. 8 shows a representation of the light distribution of the lighting device according to Fig. 7 , in particular the light segments 6a of the first light guide unit 2 and the light segments 6b of the second light guide unit 3. Those regions of the light segments 6a and 6b which lie below the lower limit UK are masked out by the diaphragm 11.
- FIG. 9 a front view of the diaphragm 11 of the lighting device 1a, which covers the coupling-out webs 2b and 3b outside the opening portion 11a.
- the diaphragm 11 may be embodied as an integral part of a lens holder supporting the lens 5, for example as a one-piece injection-molded part.
- the position of the diaphragm is, in principle, freely fixable along the optical axis OA and preferably chosen such that the position of the edge 11b with respect to the extraction webs 2b and 3b or their radiation angle, the light distribution emitted by the lens 5 by a single continuous rectilinear Lower edge UK, preferably in the form of a horizontal line, is limited downwards.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Planar Illumination Modules (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Description
Die Erfindung betrifft eine Beleuchtungsvorrichtung für einen Kraftfahrzeugscheinwerfer, aufweisend eine erste Lichtführungseinheit mit einem Haltesteg und zumindest zwei voneinander beabstandeten von dem Haltesteg abstehenden Auskopplungsstegen, eine zweite Lichtführungseinheit mit einem Haltesteg und zumindest einem von dem Haltesteg abstehenden Auskopplungssteg, einer Anzahl an Lichtquellen zur Einkopplung von Licht in die Auskopplungsstege der Lichtführungseinheiten, wobei jedem Auskopplungssteg zumindest eine Lichtquelle zugeordnet ist, und zumindest eine den Lichtführungseinheiten nachgeordnete Linse, vorzugsweise eine Projektionslinse, zur Erzeugung einer definierten Lichtverteilung, wobei jeder Auskopplungssteg eine Lichtauskopplungsfläche zur Abstrahlung von Licht in die zumindest eine Linse aufweist, wobei die erste und die zweite Lichtführungseinheit voneinander gesonderte Bauteile sind, die dergestalt zueinander angeordnet sind, dass zwischen benachbarten Auskopplungsstegen der ersten Lichtführungseinheit jeweils ein Auskopplungssteg der zweiten Lichtführungseinheit angeordnet ist.The invention relates to a lighting device for a motor vehicle headlight, comprising a first light guide unit with a holding web and at least two mutually spaced from the retaining web projecting outcoupling webs, a second light guide unit with a holding web and at least one protruding from the retaining web outcoupling web, a number of light sources for coupling of light in the decoupling webs of the light guide units, wherein each decoupling web at least one light source is assigned, and at least one of the light guide units downstream lens, preferably a projection lens, for generating a defined light distribution, each decoupling web has a light outcoupling surface for emitting light into the at least one lens, wherein the first and the second light guide unit are separate from one another, which are arranged in such a way that between adjacent coupling In each case a decoupling web of the second light guide unit is arranged in each of the first light guide unit.
Weiters betrifft die Erfindung Kraftfahrzeugscheinwerfer mit zumindest einer erfindungsgemäßen Beleuchtungsvorrichtung sowie ein Kraftfahrzeug aufweisend zumindest eine, vorzugsweise zwei Beleuchtungsvorrichtungen und/oder Kraftfahrzeugscheinwerfer.Furthermore, the invention relates to motor vehicle headlights having at least one lighting device according to the invention and a motor vehicle having at least one, preferably two lighting devices and / or motor vehicle headlights.
Eingangs genannte Beleuchtungsvorrichtungen werden in Lichtmodulen für Kraftfahrzeugscheinwerfer zur Erzeugung von Lichtverteilungen, beispielsweise zur Erzeugung von segmentierten Lichtverteilungen, d.h. von Lichtverteilungen, welche aus einzelnen Lichtsegmenten aufgebaut sind, verwendet. Ein solches Lichtsegment kann beispielsweise durch aktivieren einer Lichtquelle ausgeleuchtet werden, welche Lichtquelle einem Auskopplungssteg zugeordnet ist, wobei das in den Auskopplungssteg eingekoppelte Licht über eine nachgeordnete Linse als Lichtsegment z.B. auf einen vor der Beleuchtungsvorrichtung liegenden Bereich, beispielsweise eine Fahrbahn, abgebildet wird.Input lighting devices are used in light modules for motor vehicle headlights for generating light distributions, for example for producing segmented light distributions, i. of light distributions made up of individual light segments. Such a light segment can be illuminated, for example, by activating a light source, which light source is associated with a decoupling ridge, wherein the light coupled into the decoupling ridge is transmitted via a downstream lens as a light segment, e.g. is imaged on a lying in front of the lighting device area, such as a roadway.
Zur Erzeugung einer möglichst homogenen Lichtverteilung ist es wünschenswert, die einzelnen Auskopplungsstege möglichst nahe aneinander anzuordnen. Aus fertigungstechnischen Gründen lassen sich allerdings nur begrenzt enge Spaltmaße zwischen den Auskopplungsstegen einer Lichtführungseinheit wirtschaftlich herstellen. Aus diesem Grund ist man dazu übergangen, zwei oder mehr Lichtführungseinheiten mit Auskopplungsstegen vorzusehen, die ineinander verschoben werden können, sodass der Auskopplungssteg einer Lichtführungseinheit zwischen Auskopplungsstegen der gegenüber liegenden Lichtführungseinheit aufgenommen ist und damit geringe Spaltmaße zwischen den Auskopplungsstegen wirtschaftlich hergestellt werden können. Solche Lichtführungseinheiten sind beispielsweise aus dem Dokument
Das Dokument
Das Vorsehen von Lichtführungseinheiten, die ineinander eingreifen bzw. zur Erzeugung einer gemeinsamen Lichtverteilung zusammen wirken, hat den Nachteil, dass diese zueinander fehlpositioniert werden können, wobei die Erfahrung gezeigt hat, dass bereits geringfügige Fehlpositionierungen der Lichtführungseinheiten zueinander im Lichtbild einer solchen Beleuchtungsvorrichtung erkennbar sind. Dies betrifft insbesondere den Verlauf der Unterkante einer durch die Beleuchtungsvorrichtung abgestrahlten Lichtverteilung, der bei zueinander versetzten Lichtführungseinheiten dem Verlauf einer Rechteckfunktion entspricht.The provision of light guide units which intermesh or act together to produce a common light distribution has the disadvantage that they can be mispositioned to each other, the experience has shown that even slight misalignments of the light guide units to each other in the photograph of such a lighting device can be seen. This relates in particular to the course of the lower edge of a light distribution emitted by the illumination device, which corresponds to the course of a rectangular function in mutually offset light guide units.
Es wurden daher Anstrengungen unternommen, Positionierungsfehler der Lichtführungseinheiten zueinander zu minimieren. Diese Anstrengungen konnten bisher nur bedingt zufrieden stellende Ergebnisse zu Tage bringen, da durch den mehrteiligen, teilweise ineinander verschachtelten Aufbau der Beleuchtungsvorrichtung Toleranzmaße einzelner Komponenten nicht beliebig reduziert werden können, ohne den Zusammenbau der Beleuchtungsvorrichtung beträchtlich zu erschweren und/oder die Kosten zur Herstellung der einzelnen Komponenten deutlich zu erhöhen.Efforts have therefore been made to minimize positioning errors of the light guide units relative to each other. These efforts have so far brought only partially satisfactory results to days, since the multi-part, partially nested structure of the lighting device tolerance dimensions of individual components can not be arbitrarily reduced without significantly complicating the assembly of the lighting device and / or the cost of producing the individual Significantly increase components.
Eine Aufgabe der Erfindung besteht daher darin, eine Beleuchtungsvorrichtung zu schaffen, bei welcher die Vorteile des Vorsehens von miteinander zusammen wirkenden Lichtführungseinheiten weiterhin genutzt werden können und die genannten Nachteile, insbesondere unerwünschte Abbildungsfehler, vermieden werden.It is therefore an object of the invention to provide a lighting device in which the advantages of providing mutually cooperating light guide units can continue to be used and the mentioned disadvantages, in particular undesired aberrations, are avoided.
Diese Aufgabe wird mit einer Beleuchtungsvorrichtung der eingangs genannten Art gelöst, indem erfindungsgemäß zwischen der Linse und den Lichtauskopplungsflächen der Auskopplungsstege eine Blende angeordnet ist, die dazu eingerichtet ist, das von den Auskopplungsstegen in Richtung der Linse abgestrahltes\austretendes Licht dergestalt zu begrenzen, dass die durch die Beleuchtungsvorrichtung abgestrahlte Lichtverteilung durch eine einzige durchgängige geradlinige Unterkante, vorzugsweise in Form einer horizontale Linie, nach unten begrenzt ist.This object is achieved with a lighting device of the type mentioned by the present invention between the lens and the light extraction surfaces of the Outcoupling webs a shutter is arranged, which is adapted to limit the radiated from the coupling bars in the direction of the lens \ exiting light in such a way that the light emitted by the illumination device light distribution through a single continuous rectilinear lower edge, preferably in the form of a horizontal line, down is limited.
Dank der Erfindung können Positionierfehler der Lichtführungseinheiten in vertikaler Richtung ausgeglichen werden, sodass die durch die Beleuchtungsvorrichtung abgestrahlte Lichtverteilung durch eine einzige, scharfe, durchgängige Unterkante begrenzt wird. Die Unterkante befindet sich beispielsweise 2° unterhalb der Horizontallinie der Lichtverteilung.Thanks to the invention, positioning errors of the light guide units in the vertical direction can be compensated, so that the light distribution emitted by the lighting device is limited by a single, sharp, continuous lower edge. The lower edge is located, for example, 2 ° below the horizontal line of the light distribution.
Die erste und/ oder die zweite Lichtführungseinheit müssen nicht einstückig ausgeführt sein, sondern kann auch aus mehreren Lichtführungseinheiten zusammengesetzt sein. Die Blende besteht aus lichtundurchlässigem Material. Die Beleuchtungsvorrichtung ist vorzugsweise dazu eingerichtet, eine Abblendlichtverteilung oder eine Fernlichtverteilung, insbesondere eine adaptive Abblendlichtverteilung oder Fernlichtverteilung zu erzeugen.The first and / or the second light guide unit need not be made in one piece, but may also be composed of a plurality of light guide units. The aperture is made of opaque material. The illumination device is preferably configured to generate a low beam distribution or a high beam distribution, in particular an adaptive low beam distribution or high beam distribution.
Alternativ wäre es auch denkbar, die Auskopplungsstege voneinander getrennt auszuführen - also jeder Lichtführungseinheit nur ein Auskopplungssteg zugeordnet ist. Auf das Vorsehen von Haltestegen könnte bei einer solchen Anordnung verzichtet werden. Die Blende würde dabei den gleichen Effekt oben angeführt zeigen, allerdings ist der fertigungstechnische Aufwand zur Realisierung einer solchen Anordnung unverhältnismäßig hoch.Alternatively, it would also be conceivable to carry out the coupling-out webs separately from one another - that is to say that each light-guiding unit is assigned only one coupling-out web. The provision of holding webs could be dispensed with in such an arrangement. The aperture would show the same effect mentioned above, however, the production cost of implementing such an arrangement is disproportionately high.
Insbesondere kann vorgesehen sein, dass die Blende eine horizontale Kante zur Begrenzung der Lichtverteilung aufweist.In particular, it can be provided that the diaphragm has a horizontal edge for limiting the light distribution.
Um eine allseitige Begrenzung der Lichtverteilung zu erzielen, kann vorgesehen sein, dass die Blende eine Öffnung aufweist, durch die Licht von den Auskopplungsstegen in die Linse geleitet wird, wobei im eingebauten Zustand eine Oberseite der Öffnung durch eine horizontal verlaufende Kante begrenzt ist.In order to achieve an all-round limitation of the light distribution, it can be provided that the aperture has an opening through which light is guided by the coupling webs into the lens, wherein in the installed state, an upper side of the opening is bounded by a horizontally extending edge.
Vorzugsweise kann die Blende einstückig ausgeführt sein.Preferably, the aperture can be made in one piece.
Insbesondere kann vorgesehen sein, dass die erste Lichtführungseinheit eine Anzahl von n von dem Haltesteg abstehenden Auskopplungsstege aufweist, wobei die zweite Lichtführungseinheit eine Anzahl von n-1 von dem Haltesteg abstehende Auskopplungsstege aufweist, wobei vorzugsweise n=3, n=4 oder n≥5 gilt. Die erste Lichtführungseinheit weist in dieser Variante der Erfindung immer einen Auskopplungssteg mehr auf, als die zweite Lichtführungseinheit. Mit zunehmender Anzahl an Auskopplungsstegen ist es möglich, eine feiner aufgelöste Segmentierung der Lichtverteilung zu erzielen.In particular, it can be provided that the first light guide unit has a number of n protruding from the retaining web decoupling webs, wherein the second light guide unit has a number of n-1 protruding from the retaining web decoupling webs, preferably n = 3, n = 4 or n≥5 applies. In this variant of the invention, the first light guide unit always has a coupling web more than the second light guide unit. As the number of decoupling lands increases, it is possible to achieve a finer-resolution segmentation of the light distribution.
Bei einer alternativen Ausführungsform weisen die erste und die zweite Lichtführungseinheit eine gleiche Anzahl von Auskopplungsstegen auf. Dabei weist die erste Lichtführungseinheit eine Anzahl von n von dem Haltesteg abstehenden Auskopplungsstege auf, wobei die zweite Lichtführungseinheit eine Anzahl von n von dem Haltesteg abstehende Auskopplungsstege aufweist, wobei vorzugsweise n=3, n=4 oder n≥5 gilt.In an alternative embodiment, the first and the second light guide unit have an equal number of coupling-out webs. In this case, the first light guide unit has a number of n protruding from the retaining web outcoupling webs, wherein the second light guide unit has a number of n protruding from the retaining web decoupling webs, preferably n = 3, n = 4 or n≥5 applies.
Zudem kann vorgesehen sein, dass die erste und/oder die zweite Lichtführungseinheit als transparente Vollkörper ausgeführt sind. Die Lichtleitung innerhalb der Vollkörper erfolgt durch Totalreflexion entlang seiner Wände.In addition, it can be provided that the first and / or the second light guide unit are designed as transparent solid body. The light pipe within the solid body is made by total reflection along its walls.
Alternativ dazu kann vorgesehen sein, dass die erste und/oder die zweite Lichtführungseinheit als lichtleitende Hohlkörper ausgeführt sind.Alternatively, it can be provided that the first and / or the second light guide unit are designed as light-conducting hollow body.
Besonders günstig kann es sein, wenn jedem Auskopplungssteg zumindest eine LED-Lichtquelle zugeordnet ist. Auch können jedem Auskopplungssteg zwei oder mehr LEDs zugeordnet sein.It can be particularly favorable when at least one LED light source is assigned to each outgoer. Also, each outgoer can be associated with two or more LEDs.
Um das durch die Auskopplungsstege abgestrahlte Licht und in weiterer Folge Segmentierung der Lichtverteilung besonders genau vorgeben zu können, kann vorgesehen sein, dass einzelne, vorzugsweise alle, den Auskopplungsstegen zugeordnete Lichtquellen zur Erzeugung einer dynamischen Lichtverteilung einzeln ansteuerbar sind.In order to be able to specify the light radiated by the coupling-out webs, and consequently the segmentation of the light distribution, it can be provided that individual, preferably all, light sources associated with the coupling-out webs can be controlled individually to produce a dynamic light distribution.
Ein weiterer Aspekt Erfindung betrifft einen Kraftfahrzeugscheinwerfer mit zumindest einer erfindungsgemäßen Beleuchtungsvorrichtung sowie ein Kraftfahrzeug, aufweisend zumindest eine, vorzugsweise zwei erfindungsgemäße Beleuchtungsvorrichtungen und/ oder Kraftfahrzeugscheinwerfer.Another aspect of the invention relates to a motor vehicle headlight with at least one lighting device according to the invention and a motor vehicle, comprising at least one, preferably two lighting devices according to the invention and / or motor vehicle headlights.
Die Erfindung ist im Folgenden anhand einer beispielhaften und nicht einschränkenden Ausführungsform näher erläutert, die in den Figuren veranschaulicht ist. Darin zeigt
-
eine schematische Darstellung einer Beleuchtungsvorrichtung gemäß dem Stand der Technik undFigur 1Figur 1a eine Detaildarstellung der ,Figur 1 -
Figur 1a eine Detailansicht eines Strahlenverlaufes durch Lichtführungseinheiten gemäß ,Figur 1 -
eine schematische Darstellung mehrere durch die Beleuchtungsvorrichtung gemäßFigur 2 erzeugter Lichtsegmente,Figur 1 -
eine beispielhafte Anordnung einzelner Komponenten einer Beleuchtungsvorrichtung,Figur 3 und 4 -
Figur 5 und 6 Beispiele für Anordnungen von Lichtführungseinheiten, -
Figur 7 eine Schnittdarstellung einer erfindungsgemäßen Ausführungsform einer Beleuchtungsvorrichtung undFigur 7a eine Detaildarstellung derFigur 7 , -
eine Darstellung der Lichtverteilung der Beleuchtungsvorrichtung gemäßFigur 8Fig. 7 , -
Figur 9 eine Vorderansicht auf eine Blende der Beleuchtungsvorrichtung.
-
FIG. 1 a schematic representation of a lighting device according to the prior art andFIG. 1a a detailed view of theFIG. 1 . -
FIG. 1a a detailed view of a beam path through light guide units according toFIG. 1 . -
FIG. 2 a schematic representation of several by the lighting device according toFIG. 1 generated light segments, -
FIGS. 3 and 4 an exemplary arrangement of individual components of a lighting device, -
FIGS. 5 and 6 Examples of arrangements of light guide units, -
FIG. 7 a sectional view of an embodiment of a lighting device according to the invention andFigure 7a a detailed view of theFIG. 7 . -
FIG. 8 an illustration of the light distribution of the lighting device according toFig. 7 . -
FIG. 9 a front view of a panel of the lighting device.
In den folgenden Figuren bezeichnen - sofern nicht anders angegeben - gleiche Bezugszeichen gleiche Merkmale.In the following figures, unless otherwise stated, like reference numerals designate like features.
Die Lichtführungseinheiten 2 und 3 sind dazu eingerichtet, Licht, das über vorgelagerte Lichtquellen 4 in die Lichtführungseinheit 2 oder 3 eingekoppelt wird, in eine nachgeordnete Linse 5 einzuleiten. Die Lichtführungseinheiten 2 und 3 sind zu der optischen Achse OA der Linse 5 entsprechend ausgerichtet, um Licht in die Linse 5 einzustrahlen. Aufgrund diverser Montageungenauigkeiten und/oder Fertigungstoleranzen, auf die bei der Diskussion der
Zur besseren Erörterung der Ursachen des Versatzes der einzelnen Lichtführungseinheiten 2 und 3 zueinander, wird in Hinblick auf die nachfolgenden
Weiters ist in
Die
Im vorliegenden weist die Blende 11 eine Öffnung 11a auf, durch die Licht von den Auskopplungsstegen 2b und 3b in die Linse 5 geleitet wird, wobei im eingebauten Zustand eine Oberseite der Öffnung 11a durch eine horizontal verlaufende Kante 11b begrenzt ist (siehe
Claims (10)
- A lighting device (1a) for a motor vehicle headlamp comprising- a first light-guide unit (2) having a retaining bar (2a) and at least two outcoupling bars (2c) spaced apart from one another and protruding from the retaining bar (2a),- a second light-guide unit (3) having a retaining bar (3a) and at least one outcoupling bar (3b) protruding from the retaining bar (3a),- a number of light sources (4) for coupling light into the outcoupling bars (2b, 3b) of the light-guide units (2, 3), wherein at least one light source (4) is associated with each of the outcoupling bars (2b, 3b), and- at least one projection lens (5), arranged downstream of the light-guide units (2, 3), for generating a light distribution,wherein each of the outcoupling bars (2b, 3b) has a light-outcoupling surface (2c, 3c) for emitting light into the at least one projection lens (5), wherein the first and second light-guide units (2, 3) are components separate from one another and are arranged relative to one another such that an outcoupling bar (3b) of the second light-guide unit (3) is arranged between each of the adjacent outcoupling bars (2b) of the first light-guide unit (2), characterised in that an aperture (11) is arranged between the projection lens (5) and the light-outcoupling surfaces (2c, 3c) of the outcoupling bars (2b, 3b) and is configured to limit downwardly the light coupled from the outcoupling bars (2b, 3b) into the projection lens (5) such that the light distribution emitted by the lighting device (1a) is limited by a single continuous straight bottom edge (UK), preferably in the form of a horizontal line, wherein the aperture (11) has an opening through which light is guided from the outcoupling bars into the projection lens, wherein, when installed, an upper side of the opening is limited by a horizontal edge.
- The lighting device (1a) according to claim 1, characterised in that the aperture (11) is formed integrally.
- The lighting device (1a) according to claim 1 or 2, characterised in that the first light-guide unit (2) has a number of n outcoupling bars protruding from the retaining bar, wherein the second light-guide unit has a number of n-1 outcoupling bars protruding from the retaining bar, wherein preferably n=3, n=4, or n≥5.
- The lighting device (1a) according to any one of claims 1 to 2, characterised in that the first light-guide unit (2) has a number of n outcoupling bars protruding from the retaining bar, wherein the second light-guide unit has a number of n outcoupling bars protruding from the retaining bar, wherein preferably n=3, n=4, or n≥5.
- The lighting device (1a) according to any one of the preceding claims, characterised in that the first and/or the second light-guide units (2, 3) are formed as transparent solid bodies.
- The lighting device (1a) according to any one of claims 1 to 4, characterised in that the first and/or second light-guide units (2, 3) are formed as light-guiding hollow bodies.
- The lighting device (1a) according to any one of the preceding claims, characterised in that at least one LED light source is associated with each outcoupling bar (2b, 3b).
- The lighting device (1a) according to any one of the preceding claims, characterised in that some, preferably all, of the light sources associated with the outcoupling bars (2b, 3b) are actuatable individually to generate a dynamic light distribution.
- A motor vehicle headlamp comprising at least one lighting device (1a) according to any one of the preceding claims.
- A motor vehicle comprising at least one, preferably two lighting devices (1a) and/or motor vehicle headlamps according to any one of the preceding claims.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ATA50825/2015A AT517697B1 (en) | 2015-09-30 | 2015-09-30 | Lighting device for a motor vehicle headlight |
PCT/AT2016/060033 WO2017054020A1 (en) | 2015-09-30 | 2016-08-19 | Lighting device for a motor vehicle headlight |
Publications (2)
Publication Number | Publication Date |
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EP3356728A1 EP3356728A1 (en) | 2018-08-08 |
EP3356728B1 true EP3356728B1 (en) | 2019-06-26 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP16760640.9A Active EP3356728B1 (en) | 2015-09-30 | 2016-08-19 | Lighting device for a motor vehicle headlight |
Country Status (6)
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US (1) | US10527248B2 (en) |
EP (1) | EP3356728B1 (en) |
JP (1) | JP6535820B2 (en) |
CN (1) | CN108139057B (en) |
AT (1) | AT517697B1 (en) |
WO (1) | WO2017054020A1 (en) |
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EP3527875A1 (en) * | 2018-02-15 | 2019-08-21 | ZKW Group GmbH | Motor vehicle headlamp with a burning lens sheet |
DE102018127689A1 (en) * | 2018-11-06 | 2020-05-07 | HELLA GmbH & Co. KGaA | Imaging unit and headlights |
EP3663641A1 (en) * | 2018-12-07 | 2020-06-10 | Marelli Automotive Lighting Italy S.p.A. | Vehicle lighting and/or signalling device |
JP7277785B2 (en) | 2020-04-10 | 2023-05-19 | 日亜化学工業株式会社 | light emitting device |
JP2022113003A (en) * | 2021-01-22 | 2022-08-03 | スタンレー電気株式会社 | Vehicular lamp |
EP4303482A1 (en) * | 2022-07-07 | 2024-01-10 | ZKW Group GmbH | Lighting device for a motor vehicle headlamp with adjacently arranged lighting units |
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US20090016074A1 (en) * | 2007-07-09 | 2009-01-15 | Magna International Inc. | Semiconductor light engine using glass light pipes |
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DE102010029176A1 (en) * | 2009-10-05 | 2012-12-27 | Automotive Lighting Reutlingen Gmbh | Motor vehicle headlight with a semiconductor light sources, a primary optics and a secondary optics having light module |
DE102010023177A1 (en) * | 2010-06-09 | 2011-12-15 | Automotive Lighting Reutlingen Gmbh | Light module for a lighting device of a motor vehicle |
AT511760B1 (en) * | 2011-08-08 | 2013-12-15 | Zizala Lichtsysteme Gmbh | LED LIGHT SOURCE MODULE FOR A LED MOTOR VEHICLE HEADLIGHT AND LED MOTOR VEHICLE HEADLAMP AND HEADLAMP SYSTEM |
AT511761B1 (en) * | 2011-08-08 | 2014-02-15 | Zizala Lichtsysteme Gmbh | LED LIGHT SOURCE MODULE FOR A VEHICLE HEADLAMP AND VEHICLE HEADLAMP AND VEHICLE LIGHT SYSTEM |
AT512865B1 (en) * | 2012-05-09 | 2014-12-15 | Zizala Lichtsysteme Gmbh | Lighting device for a motor vehicle headlight and light module and motor vehicle headlight with lighting device |
AT513341B1 (en) * | 2012-09-03 | 2015-06-15 | Zizala Lichtsysteme Gmbh | Lighting unit for a headlight |
DE102013013456B4 (en) | 2012-10-14 | 2023-03-30 | Docter Optics Se | Optical element for a vehicle headlight |
AT513738B1 (en) * | 2012-12-20 | 2014-07-15 | Zizala Lichtsysteme Gmbh | Lighting unit for a headlight |
AT513816B1 (en) * | 2012-12-20 | 2015-11-15 | Zizala Lichtsysteme Gmbh | Light guide unit for a lighting unit of a headlamp and lighting unit and headlamp |
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AT514705B1 (en) | 2013-10-28 | 2015-03-15 | Zizala Lichtsysteme Gmbh | Mounting device for an optical body for a motor vehicle headlight |
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2015
- 2015-09-30 AT ATA50825/2015A patent/AT517697B1/en not_active IP Right Cessation
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2016
- 2016-08-19 EP EP16760640.9A patent/EP3356728B1/en active Active
- 2016-08-19 US US15/762,855 patent/US10527248B2/en not_active Expired - Fee Related
- 2016-08-19 JP JP2018532480A patent/JP6535820B2/en active Active
- 2016-08-19 CN CN201680057088.8A patent/CN108139057B/en active Active
- 2016-08-19 WO PCT/AT2016/060033 patent/WO2017054020A1/en active Application Filing
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CN108139057B (en) | 2021-03-16 |
JP6535820B2 (en) | 2019-06-26 |
CN108139057A (en) | 2018-06-08 |
AT517697B1 (en) | 2017-04-15 |
US10527248B2 (en) | 2020-01-07 |
EP3356728A1 (en) | 2018-08-08 |
WO2017054020A1 (en) | 2017-04-06 |
AT517697A4 (en) | 2017-04-15 |
US20180292061A1 (en) | 2018-10-11 |
JP2018526805A (en) | 2018-09-13 |
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