EP3974710A1 - Lighting device for a motor vehicle headlight - Google Patents
Lighting device for a motor vehicle headlight Download PDFInfo
- Publication number
- EP3974710A1 EP3974710A1 EP20198393.9A EP20198393A EP3974710A1 EP 3974710 A1 EP3974710 A1 EP 3974710A1 EP 20198393 A EP20198393 A EP 20198393A EP 3974710 A1 EP3974710 A1 EP 3974710A1
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- EP
- European Patent Office
- Prior art keywords
- lighting device
- light
- light module
- main surface
- diaphragm
- 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]
- F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled 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
- F21S41/25—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
- F21S41/40—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
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
- F21V5/045—Refractors for light sources of lens shape the lens having discontinuous faces, e.g. Fresnel lenses
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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
- F21W2102/135—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions
- F21W2102/16—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions having blurred cut-off lines
Definitions
- the invention relates to a motor vehicle headlight with at least one lighting device according to the invention.
- a Fresnel lens (more precisely: Fresnel Fresnel lens) is an optical lens that enables the construction of large and thick lenses with a short focal length without the weight and bulk of conventional lenses.
- the Fresnel lens With the Fresnel lens, the volume is reduced by dividing it into ring-shaped areas. In each of these areas, the thickness is reduced, giving the lens a series of annular steps. Since light is only refracted on the main surface of the lens, the angle of refraction does not depend on the thickness but only on the angle between the two surfaces of a lens. The lens therefore retains its optical properties, although the image quality is affected by the stepped structure, which is irrelevant in many applications. Examples of this are the lighting beam paths in headlights of all kinds.
- each step is curved and has at least one focal point, which focal point is arranged horizontally and/or vertically offset from the optical axis of the Fresnel lens, and wherein adjacent steps have different focal points from one another.
- each step or the main surface of the step has a plurality of sections, which can each have different focal points.
- --seen in an installed position of the lighting device in a motor vehicle headlight--the upper half of a stage has a different focal point to a lower half of the stage.
- two light images are generated, which are offset from one another in the vertical direction.
- focal points which are offset from one another in the horizontal direction, with the light images being offset from one another in the horizontal direction. If the offset light images overlap one another, blurring occurs, which is advantageous when compensating for color effects in the light-dark boundary and when the light-dark boundary is softened.
- optical axis means that optical axis which on the one hand also represents an axis of symmetry of the Fresnel lens, ie essentially intersects the Fresnel lens in the center or in the midpoint.
- the terms refer to a location or an orientation, such as “horizontal”, “vertical”, “in the horizontal direction”, “in the vertical direction”, “above”, “below”, “front”, “back”. “, “underneath”, “above” etc. to a proper installation position of the projection module in question in a motor vehicle headlight.
- the wording “arranged horizontally and/or vertically shifted” includes a shift in a horizontal plane or a vertical plane, i.e. the focal points can also be arranged shifted along or in the direction of the optical axis.
- the beam diaphragm to have a longitudinal axis, with the longitudinal axis of the beam diaphragm being arranged in a horizontal plane when the lighting device is installed in a motor vehicle headlight, and with the optically relevant diaphragm edge being set up to produce an asymmetrical light-dark boundary, and wherein the first light module, in combination with the optically relevant aperture edge of the beam aperture, contributes to the generation of a low beam distribution.
- the lighting device comprises at least one second light module with at least one light source for generating a high beam distribution.
- the low beam distribution and the high beam distribution switched on for example, form an overall light distribution, with any gap spacing between these light distributions also being projected out of focus due to the shifted focal points, which closes the resulting gap between the low beam distribution and the high beam distribution.
- 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, which lighting device includes a first light module 100 with at least one light source for generating a low beam distribution in the direction of a main emission direction, the first light module 100 being set up to emit light beams in a main emission direction.
- the lighting device 10 includes a projection lens 300 with an optical axis A, which projection lens 300 is set up to image the light that can be generated by the first light module 100 in front of the lighting device 10 , the projection lens 300 being designed as a Fresnel lens.
- the Fresnel lens comprises a base body 310 and a plurality of annular steps 320 arranged on the base body 310 , which steps 320 are arranged essentially concentrically with one another, with each step 320 having a main surface 320a for projecting the light beams of the at least one light module 100 in front of the lighting device 10 and a has a ramp surface 320b extending from the base body 310 to the main surface 320a , as in FIG 2 can be seen more clearly.
- the main surface 320a and the rising surface 320b of a step 320 form a step edge 320c in a common surface intersection line , the step edges 320c being at a distance of less than 20 ⁇ m from adjacent step edges 320c , preferably less than 10 ⁇ m, preferably less than 5 ⁇ m.
- Lighting device 10 further comprises a beam stop 400 with a longitudinal axis, with the longitudinal axis of beam stop 400 being arranged in a horizontal plane when lighting device 100 is installed in a motor vehicle headlight, with beam stop 400 having an optically relevant stop edge 410 for generating an asymmetrical light/dark -boundary, wherein the aperture edge 410 intersects the optical axis A of the Fresnel lens.
- the first light module 100 is arranged on an upper side of the beam stop and, in combination with the optically relevant screen edge 410 of the beam stop 400 , contributes to the generation of a low beam distribution.
- the terms refer to a location or an orientation, such as “horizontal”, “vertical”, “in the horizontal direction”, “in the vertical direction”, “above”, “below”, “front”, “back”. “, “underneath”, “above” etc. to a proper installation position of the lighting device in question in a motor vehicle headlight.
- each step 320 is curved and has a focal point F1, F2, F3, F4 , which focal point F1, F2, F3, F4 is offset horizontally and/or vertically from the optical axis A of the Fresnel lens, and where adjacent steps 320 have mutually different focal points F1, F2, F3, F4 .
- the outermost stage of the Fresnel lens is assigned a focal point F1
- the next inner stage is assigned a focal point F2 , and so on.
- the curved major surfaces 320a of the steps may be convex or concave; in 2 the exemplary step is formed with a convex major surface 320a .
- the exemplary lighting device comprises 1 a second light module 200 with at least one light source for generating a high beam distribution, the second light module 200 being arranged on an underside of the beam shield 400 .
- ⁇ b>LIST OF REFERENCE MARKS ⁇ /b> Lighting device ... 10 First light module... 100 Second light module... 200 projection lens ... 300 base body ... 310 Step... 320 main face... 320a incline surface... 320b step edge .... 320c Beam stop... 400 Aperture edge... 410 focus... F1, F2, F3, F4
Abstract
Beleuchtungsvorrichtung (10) für einen Kraftfahrzeugscheinwerfer, welche Folgendes umfasst:- ein erstes Lichtmodul (100) zur Erzeugung einer Lichtverteilung,- eine Strahlenblende (300) mit einer Strahlenblende (300), welche eine optisch relevante Blendenkante (310) zur Erzeugung einer Hell-Dunkel-Grenze umfasst,- eine Projektionslinse (400) mit einer optischen Achse (A), welche eingerichtet ist, das von dem ersten Lichtmodul (100) erzeugbare Licht vor der Beleuchtungsvorrichtung (10) abzubilden, wobei die Projektionslinse (400) als Fresnellinse ausgebildet ist, welche Fresnellinse einen Basiskörper (410) und mehrere an dem Basiskörper (410) angeordnete, ringförmige Stufen (420) umfasst, wobei jede Stufe (420) eine Hauptfläche (420a) zur Projektion der Lichtstrahlen des zumindest einen Lichtmoduls (100) vor die Beleuchtungsvorrichtung (10) und eine sich von dem Basiskörper (410) bis zur Hauptfläche (420a) erstreckende Steigungsfläche (420b) aufweist, wobei die Hauptfläche jeder Stufe gekrümmt ausgebildet ist und einen Brennpunkt aufweist, welcher Brennpunkt von der optischen Achse der Fresnellinse horizontal und/oder vertikal verschoben angeordnet ist, und wobei benachbarte Stufen voneinander unterschiedliche Brennpunkte aufweisen.Lighting device (10) for a motor vehicle headlight, which comprises the following: - a first light module (100) for generating a light distribution, - a beam diaphragm (300) with a beam diaphragm (300) which has an optically relevant diaphragm edge (310) for generating a bright Dark boundary comprises - a projection lens (400) with an optical axis (A), which is set up to image the light that can be generated by the first light module (100) in front of the lighting device (10), the projection lens (400) being designed as a Fresnel lens which Fresnel lens comprises a base body (410) and a plurality of annular steps (420) arranged on the base body (410), each step (420) having a main surface (420a) for projecting the light beams of the at least one light module (100) in front of the Lighting device (10) and from the base body (410) to the main surface (420a) extending slope surface (420b), wherein the main surface of each stage ge is curved and has a focal point, which focal point is horizontally and/or vertically shifted from the optical axis of the Fresnel lens, and wherein adjacent stages have different focal points from each other.
Description
Die Erfindung betrifft eine Beleuchtungsvorrichtung für einen Kraftfahrzeugscheinwerfer, welche Beleuchtungsvorrichtung Folgendes umfasst:
- zumindest ein erstes Lichtmodul mit zumindest einer Lichtquelle zur Erzeugung einer Lichtverteilung in Richtung einer Hauptabstrahlrichtung, wobei das Lichtmodul eingerichtet ist, Lichtstrahlen in eine Hauptabstrahlrichtung zu emittieren,
- eine Projektionslinse mit einer optischen Achse, welche eingerichtet ist, das von dem ersten Lichtmodul erzeugbare Licht vor der Beleuchtungsvorrichtung abzubilden, wobei die Projektionslinse als Fresnellinse ausgebildet ist, welche Fresnellinse einen Basiskörper und mehrere an dem Basiskörper angeordnete, ringförmige Stufen umfasst, welche Stufen im Wesentlichen konzentrisch zueinander angeordnet sind, wobei jede Stufe eine Hauptfläche zur Projektion der Lichtstrahlen des zumindest einen Lichtmoduls vor die Beleuchtungsvorrichtung und eine sich von dem Basiskörper bis zur Hauptfläche erstreckende Steigungsfläche aufweist,
- eine Strahlenblende, wobei die Strahlenblende eine optisch relevante Blendenkante zur Erzeugung einer Hell-Dunkel-Grenze umfasst, wobei die Blendenkante die optische Achse der Fresnellinse schneidet, und wobei das erste Lichtmodul an einer Oberseite der Strahlenblende angeordnet ist und in Kombination mit der optisch relevanten Blendenkante der Strahlenblende zur Erzeugung einer Lichtverteilung mitwirkt.
- at least one first light module with at least one light source for generating a light distribution in the direction of a main emission direction, the light module being set up to emit light beams in a main emission direction,
- a projection lens with an optical axis, which is set up to image the light that can be generated by the first light module in front of the lighting device, the projection lens being designed as a Fresnel lens, which Fresnel lens comprises a base body and a plurality of annular steps arranged on the base body, which steps essentially are arranged concentrically to one another, each step having a main surface for projecting the light beams of the at least one light module in front of the lighting device and a sloped surface extending from the base body to the main surface,
- a beam stop, wherein the beam stop comprises an optically relevant stop edge for generating a light-dark boundary, wherein the stop edge intersects the optical axis of the Fresnel lens, and wherein the first light module is arranged on a top side of the beam stop and in combination with the optically relevant stop edge the beam stop contributes to the generation of a light distribution.
Weiters betrifft die Erfindung einen Kraftfahrzeugscheinwerfer mit zumindest einer erfindungsgemäßen Beleuchtungsvorrichtung.Furthermore, the invention relates to a motor vehicle headlight with at least one lighting device according to the invention.
Eine Fresnellinse (genauer: Fresnel'sche Stufenlinse) ist eine optische Linse, die die Konstruktion großer und dicker Linsen mit kurzer Brennweite ohne das Gewicht und das Volumen herkömmlicher Linsen ermöglicht.A Fresnel lens (more precisely: Fresnel Fresnel lens) is an optical lens that enables the construction of large and thick lenses with a short focal length without the weight and bulk of conventional lenses.
Die Verringerung des Volumens geschieht bei der Fresnellinse durch eine Aufteilung in ringförmige Bereiche. In jedem dieser Bereiche wird die Dicke verringert, so dass die Linse eine Reihe ringförmiger Stufen erhält. Da Licht nur an der Hauptfläche der Linse gebrochen wird, ist der Brechungswinkel nicht von der Dicke, sondern nur vom Winkel zwischen den beiden Oberflächen einer Linse abhängig. Deshalb behält die Linse ihre optischen Eigenschaften bei, obwohl die Bildqualität durch die Stufenstruktur beeinträchtigt wird, was aber in vielen Anwendungsfällen keine Rolle spielt. Beispiele hierfür sind Beleuchtungs-Strahlengänge bei Scheinwerfern aller Art.With the Fresnel lens, the volume is reduced by dividing it into ring-shaped areas. In each of these areas, the thickness is reduced, giving the lens a series of annular steps. Since light is only refracted on the main surface of the lens, the angle of refraction does not depend on the thickness but only on the angle between the two surfaces of a lens. The lens therefore retains its optical properties, although the image quality is affected by the stepped structure, which is irrelevant in many applications. Examples of this are the lighting beam paths in headlights of all kinds.
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 Hauptfläche jeder Stufe gekrümmt ausgebildet ist und zumindest einen Brennpunkt aufweist, welcher Brennpunkt von der optischen Achse der Fresnellinse horizontal und/oder vertikal verschoben angeordnet ist, und wobei benachbarte Stufen voneinander unterschiedliche Brennpunkte aufweisen.This object is achieved in that the main surface of each step is curved and has at least one focal point, which focal point is arranged horizontally and/or vertically offset from the optical axis of the Fresnel lens, and wherein adjacent steps have different focal points from one another.
Dabei kann beispielsweise vorgesehen sein, dass je eine Stufe bzw. die Hauptfläche der Stufe mehrere Abschnitte aufweist, welche jeweils unterschiedliche Brennpunkte aufweisen können. So kann beispielsweise vorgesehen sein, dass - gesehen in einer Einbaulage der Beleuchtungsvorrichtung in einem Kraftfahrzeugscheinwerfer - die obere Hälfte einer Stufe einen unterschiedlichen Brennpunkt zu einer unteren Hälfte der Stufe aufweist.It can be provided, for example, that each step or the main surface of the step has a plurality of sections, which can each have different focal points. For example, it can be provided that--seen in an installed position of the lighting device in a motor vehicle headlight--the upper half of a stage has a different focal point to a lower half of the stage.
Bei einer Verteilung beispielsweise zweier Brennpunkte, einer oberhalb und einer unterhalb der optischen Achse in vertikaler Richtung bzw. der Blendenkante, werden zwei Lichtbilder erzeugt, welche zueinander in vertikaler Richtung versetzt zueinander angeordnet sind. Dasselbe gilt für Brennpunkte welche in horizontaler Richtung versetzt zueinander sind, dabei sind die Lichtbilder in horizontaler Richtung zueinander versetzt. Bei einer Überlappung der versetzten Lichtbilder übereinander entsteht eine Unschärfe, welche beim Kompensieren von Farbeffekten in der Hell-Dunkel-Grenze als auch bei Aufweichen der Hell-Dunkel-Grenze von Vorteil ist.With a distribution of, for example, two focal points, one above and one below the optical axis in the vertical direction or the diaphragm edge, two light images are generated, which are offset from one another in the vertical direction. The same applies to focal points which are offset from one another in the horizontal direction, with the light images being offset from one another in the horizontal direction. If the offset light images overlap one another, blurring occurs, which is advantageous when compensating for color effects in the light-dark boundary and when the light-dark boundary is softened.
Dabei kann eine Verschiebung der Lichtverteilungen von ca. 1/10° bis mehreren Zehntel Grad in horizontaler und/oder vertikaler Richtung - gemessen an einem den gesetzlichen Rahmenbedingungen entsprechenden Messschirm (beispielsweise Messschirm im Sinne der ECE-Richtlinien) - vorgesehen sein.A shift in the light distribution of approx. 1/10° to several tenths of a degree in the horizontal and/or vertical direction - measured by the statutory Framework conditions corresponding measuring screen (for example measuring screen within the meaning of the ECE guidelines) - be provided.
Mit dem Begriff "optischer Achse" ist diejenige optische Achse gemeint, welche einerseits auch eine Symmetrieachse der Fresnellinse darstellt, also die Fresnellinse im Wesentlichen im Zentrum bzw. im Mittelpunkt schneidet.The term "optical axis" means that optical axis which on the one hand also represents an axis of symmetry of the Fresnel lens, ie essentially intersects the Fresnel lens in the center or in the midpoint.
Generell beziehen sich im Weiteren die Begriffe hinsichtlich eines Ortes oder einer Orientierung, wie beispielsweise "horizontal", "vertikal", "in horizontaler Richtung", "in vertikaler Richtung", "oben", "unten", "vorne", "hinten", "darunter", "darüber" etc. auf eine ordnungsgemäße Einbaulage des gegenständlichen Projektionsmoduls in einem Kraftfahrzeugscheinwerfer.In general, the terms refer to a location or an orientation, such as "horizontal", "vertical", "in the horizontal direction", "in the vertical direction", "above", "below", "front", "back". ", "underneath", "above" etc. to a proper installation position of the projection module in question in a motor vehicle headlight.
Ferner sei darauf hingewiesen, dass die Formulierung "horizontal und/oder vertikal verschoben angeordnet" eine Verschiebung in einer Horizontalebene bzw. einer Vertikalebene einschließt, d.h. die Brennpunkte können auch entlang bzw. in Richtung der optischen Achse verschoben angeordnet sein.It should also be pointed out that the wording “arranged horizontally and/or vertically shifted” includes a shift in a horizontal plane or a vertical plane, i.e. the focal points can also be arranged shifted along or in the direction of the optical axis.
Es kann vorgesehen sein, dass die Strahlenblende eine Längsachse aufweist, wobei die Längsachse der Strahlenblende in einem eingebauten Zustand der Beleuchtungsvorrichtung in einem Kraftfahrzeugscheinwerfer in einer Horizontalebene angeordnet ist, und wobei die optisch relevante Blendenkante eingerichtet ist eine asymmetrische Hell-Dunkel-Grenze zu erzeugen, und wobei das erste Lichtmodul in Kombination mit der optisch relevanten Blendenkante der Strahlenblende zur Erzeugung einer Abblendlichtverteilung mitwirkt.Provision can be made for the beam diaphragm to have a longitudinal axis, with the longitudinal axis of the beam diaphragm being arranged in a horizontal plane when the lighting device is installed in a motor vehicle headlight, and with the optically relevant diaphragm edge being set up to produce an asymmetrical light-dark boundary, and wherein the first light module, in combination with the optically relevant aperture edge of the beam aperture, contributes to the generation of a low beam distribution.
Es kann vorgesehen sein, dass die Beleuchtungsvorrichtung zumindest ein zweites Lichtmodul mit zumindest einer Lichtquelle zur Erzeugung einer Fernlichtverteilung umfasst.It can be provided that the lighting device comprises at least one second light module with at least one light source for generating a high beam distribution.
Die Abblendlichtverteilung und die beispielsweise zugeschaltete Fernlichtverteilung bilden eine Gesamtlichtverteilung, wobei ein möglich auftretender Spaltabstand zwischen diesen Lichtverteilungen aufgrund der verschobenen Brennpunkte ebenfalls unscharf projiziert wird, wodurch der entstehende Spalt zwischen Abblendlichtverteilung und Fernlichtverteilung geschlossen wird.The low beam distribution and the high beam distribution switched on, for example, form an overall light distribution, with any gap spacing between these light distributions also being projected out of focus due to the shifted focal points, which closes the resulting gap between the low beam distribution and the high beam distribution.
Es kann vorgesehen sein, dass das zweite Lichtmodul an einer Unterseite der Strahlenblende angeordnet ist.Provision can be made for the second light module to be arranged on an underside of the beam stop.
Es kann vorgesehen sein, dass die Hauptfläche der Stufen konvex oder konkav ausgebildet ist.Provision can be made for the main surface of the steps to be convex or concave.
Es kann vorgesehen sein, dass die Hauptfläche und die Steigungsfläche einer Stufe in einer gemeinsamen Flächenschnittlinie eine Stufenkante ausbilden, wobei die Stufenkanten von benachbarten Stufenkanten einen Abstand kleiner als 20 µm, vorzugsweise kleiner als 10 µm, vorzugsweise kleiner als 5 µm, aufweisen.Provision can be made for the main surface and the rising surface of a step to form a step edge in a common surface intersection line, with the step edges being at a distance of less than 20 μm, preferably less than 10 μm, preferably less than 5 μm from adjacent step edges.
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
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Fig. 1 eine Seitenansicht einer beispielhaften Beleuchtungsvorrichtung mit einer als Fresnellinse ausgebildeten Projektionslinse, wobei die Fresnellinse mehrere im Wesentlichen zueinander konzentrische Stufen umfasst, und -
Fig. 2 eine Querschnittansicht einer Stufe der Fresnellinse ausFig. 1 .
-
1 a side view of an exemplary lighting device with a projection lens designed as a Fresnel lens, wherein the Fresnel lens comprises a plurality of steps which are essentially concentric to one another, and -
2 Figure 12 shows a cross-sectional view of a stage of the Fresnel lens1 .
Ferner umfasst die Beleuchtungsvorrichtung 10 eine Projektionslinse 300 mit einer optischen Achse A, welche Projektionslinse 300 eingerichtet ist, das von dem ersten Lichtmodul 100 erzeugbare Licht vor der Beleuchtungsvorrichtung 10 abzubilden, wobei die Projektionslinse 300 als Fresnellinse ausgebildet ist.Furthermore, the
Die Fresnellinse umfasst einen Basiskörper 310 und mehrere an dem Basiskörper 310 angeordnete, ringförmige Stufen 320, welche Stufen 320 im Wesentlichen konzentrisch zueinander angeordnet sind, wobei jede Stufe 320 eine Hauptfläche 320a zur Projektion der Lichtstrahlen des zumindest einen Lichtmoduls 100 vor die Beleuchtungsvorrichtung 10 und eine sich von dem Basiskörper 310 bis zur Hauptfläche 320a erstreckende Steigungsfläche 320b aufweist, wie in
Überdies bilden die Hauptfläche 320a und die Steigungsfläche 320b einer Stufe 320 in einer gemeinsamen Flächenschnittlinie eine Stufenkante 320c aus, wobei die Stufenkanten 320c von benachbarten Stufenkanten 320c einen Abstand kleiner als 20 µm, vorzugsweise kleiner als 10 µm, vorzugsweise kleiner als 5 µm, aufweisen.In addition, the
Weiter umfasst die Beleuchtungsvorrichtung 10 eine Strahlenblende 400 mit einer Längsachse, wobei die Längsachse der Strahlenblende 400 in einem eingebauten Zustand der Beleuchtungsvorrichtung 100 in einem Kraftfahrzeugscheinwerfer in einer Horizontalebene angeordnet ist, wobei die Strahlenblende 400 eine optisch relevante Blendenkante 410 zur Erzeugung einer asymmetrischen Hell-Dunkel-Grenze umfasst, wobei die Blendenkante 410 die optische Achse A der Fresnellinse schneidet.
Das erste Lichtmodul 100 ist dabei an einer Oberseite der Strahlenblende angeordnet ist und in Kombination mit der optisch relevanten Blendenkante 410 der Strahlenblende 400 zur Erzeugung einer Abblendlichtverteilung mitwirkt.The
Generell beziehen sich im Weiteren die Begriffe hinsichtlich eines Ortes oder einer Orientierung, wie beispielsweise "horizontal", "vertikal", "in horizontaler Richtung", "in vertikaler Richtung", "oben", "unten", "vorne", "hinten", "darunter", "darüber" etc. auf eine ordnungsgemäße Einbaulage der gegenständlichen Beleuchtungsvorrichtung in einem Kraftfahrzeugscheinwerfer.In general, the terms refer to a location or an orientation, such as "horizontal", "vertical", "in the horizontal direction", "in the vertical direction", "above", "below", "front", "back". ", "underneath", "above" etc. to a proper installation position of the lighting device in question in a motor vehicle headlight.
Die Hauptfläche 320a jeder Stufe 320 ist gekrümmt ausgebildet und weist jeweils einen Brennpunkt F1, F2, F3, F4 auf, welcher Brennpunkt F1, F2, F3, F4 von der optischen Achse A der Fresnellinse horizontal und/oder vertikal verschoben angeordnet ist, und wobei benachbarte Stufen 320 voneinander unterschiedliche Brennpunkte F1, F2, F3, F4 aufweisen.The
Wie in
Die gekrümmten Hauptflächen 320a der Stufen können konvex oder konkav ausgebildet sein; in
Ferner umfasst die beispielhafte Beleuchtungsvorrichtung aus
Claims (7)
die Hauptfläche (320a) jeder Stufe (320) gekrümmt ausgebildet ist und zumindest einen Brennpunkt (F1, F2, F3, F4) aufweist, welcher Brennpunkt (F1, F2, F3, F4) von der optischen Achse (A) der Fresnellinse horizontal und/oder vertikal verschoben angeordnet ist, und wobei benachbarte Stufen (320) voneinander unterschiedliche Brennpunkte (F1, F2, F3, F4) aufweisen.Lighting device (10) for a motor vehicle headlight, which lighting device (10) comprises the following:
the main surface (320a) of each step (320) is curved and has at least one focal point (F1, F2, F3, F4), which focal point (F1, F2, F3, F4) is horizontal and /or is arranged shifted vertically, and wherein adjacent stages (320) have different focal points (F1, F2, F3, F4).
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20198393.9A EP3974710A1 (en) | 2020-09-25 | 2020-09-25 | Lighting device for a motor vehicle headlight |
PCT/EP2021/070587 WO2022063459A1 (en) | 2020-09-25 | 2021-07-22 | Lighting device for a motor vehicle headlamp |
JP2023518481A JP2023543194A (en) | 2020-09-25 | 2021-07-22 | Illumination device for automobile floodlights |
CN202180065317.1A CN116324272A (en) | 2020-09-25 | 2021-07-22 | Lighting device for motor vehicle headlight |
EP21743214.5A EP4217646A1 (en) | 2020-09-25 | 2021-07-22 | Lighting device for a motor vehicle headlamp |
US18/026,323 US11965632B2 (en) | 2020-09-25 | 2021-07-22 | Lighting device for a motor vehicle headlamp |
KR1020237004429A KR20230036131A (en) | 2020-09-25 | 2021-07-22 | Lighting devices for automobile headlights |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20198393.9A EP3974710A1 (en) | 2020-09-25 | 2020-09-25 | Lighting device for a motor vehicle headlight |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3974710A1 true EP3974710A1 (en) | 2022-03-30 |
Family
ID=72659633
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20198393.9A Withdrawn EP3974710A1 (en) | 2020-09-25 | 2020-09-25 | Lighting device for a motor vehicle headlight |
EP21743214.5A Pending EP4217646A1 (en) | 2020-09-25 | 2021-07-22 | Lighting device for a motor vehicle headlamp |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP21743214.5A Pending EP4217646A1 (en) | 2020-09-25 | 2021-07-22 | Lighting device for a motor vehicle headlamp |
Country Status (5)
Country | Link |
---|---|
EP (2) | EP3974710A1 (en) |
JP (1) | JP2023543194A (en) |
KR (1) | KR20230036131A (en) |
CN (1) | CN116324272A (en) |
WO (1) | WO2022063459A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11719404B2 (en) | 2021-06-22 | 2023-08-08 | Hyundai Mobis Co., Ltd. | Lamp for vehicle and vehicle including the same |
DE102021123955B4 (en) | 2021-02-24 | 2023-11-30 | Hyundai Mobis Co., Ltd. | LAMP FOR A VEHICLE AND VEHICLE WITH THE SAME |
WO2024061674A1 (en) * | 2022-09-20 | 2024-03-28 | HELLA GmbH & Co. KGaA | Headlight for a motor vehicle |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1270324A2 (en) * | 2001-06-20 | 2003-01-02 | DaimlerChrysler AG | Vehicle headlamp |
US20050190572A1 (en) * | 2004-02-26 | 2005-09-01 | Koito Manufacturing Co., Ltd. | Vehicle headlamp |
DE102004008296A1 (en) * | 2004-02-20 | 2005-09-08 | Daimlerchrysler Ag | Headlamp lens for a motor vehicle has a body for light to pass through with Fresnel lenses and channels opposite a source of light |
WO2007022861A1 (en) * | 2005-08-22 | 2007-03-01 | Docter Optics Gmbh | Headlamp lens for a vehicle headlamp |
US20110205748A1 (en) * | 2010-02-24 | 2011-08-25 | Yasushi Yatsuda | Vehicle light and multi-focal lens |
JP2013186951A (en) * | 2012-03-06 | 2013-09-19 | Koito Mfg Co Ltd | Lighting fixture for vehicle |
-
2020
- 2020-09-25 EP EP20198393.9A patent/EP3974710A1/en not_active Withdrawn
-
2021
- 2021-07-22 WO PCT/EP2021/070587 patent/WO2022063459A1/en unknown
- 2021-07-22 JP JP2023518481A patent/JP2023543194A/en active Pending
- 2021-07-22 EP EP21743214.5A patent/EP4217646A1/en active Pending
- 2021-07-22 CN CN202180065317.1A patent/CN116324272A/en active Pending
- 2021-07-22 KR KR1020237004429A patent/KR20230036131A/en unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1270324A2 (en) * | 2001-06-20 | 2003-01-02 | DaimlerChrysler AG | Vehicle headlamp |
DE102004008296A1 (en) * | 2004-02-20 | 2005-09-08 | Daimlerchrysler Ag | Headlamp lens for a motor vehicle has a body for light to pass through with Fresnel lenses and channels opposite a source of light |
US20050190572A1 (en) * | 2004-02-26 | 2005-09-01 | Koito Manufacturing Co., Ltd. | Vehicle headlamp |
WO2007022861A1 (en) * | 2005-08-22 | 2007-03-01 | Docter Optics Gmbh | Headlamp lens for a vehicle headlamp |
US20110205748A1 (en) * | 2010-02-24 | 2011-08-25 | Yasushi Yatsuda | Vehicle light and multi-focal lens |
JP2013186951A (en) * | 2012-03-06 | 2013-09-19 | Koito Mfg Co Ltd | Lighting fixture for vehicle |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102021123955B4 (en) | 2021-02-24 | 2023-11-30 | Hyundai Mobis Co., Ltd. | LAMP FOR A VEHICLE AND VEHICLE WITH THE SAME |
US11719404B2 (en) | 2021-06-22 | 2023-08-08 | Hyundai Mobis Co., Ltd. | Lamp for vehicle and vehicle including the same |
DE102021125912B4 (en) | 2021-06-22 | 2023-12-21 | Hyundai Mobis Co., Ltd. | LAMP FOR A VEHICLE AND VEHICLE WITH THIS |
WO2024061674A1 (en) * | 2022-09-20 | 2024-03-28 | HELLA GmbH & Co. KGaA | Headlight for a motor vehicle |
Also Published As
Publication number | Publication date |
---|---|
JP2023543194A (en) | 2023-10-13 |
KR20230036131A (en) | 2023-03-14 |
US20230358385A1 (en) | 2023-11-09 |
WO2022063459A1 (en) | 2022-03-31 |
CN116324272A (en) | 2023-06-23 |
EP4217646A1 (en) | 2023-08-02 |
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