EP4217646A1 - Lighting device for a motor vehicle headlamp - Google Patents
Lighting device for a motor vehicle headlampInfo
- Publication number
- EP4217646A1 EP4217646A1 EP21743214.5A EP21743214A EP4217646A1 EP 4217646 A1 EP4217646 A1 EP 4217646A1 EP 21743214 A EP21743214 A EP 21743214A EP 4217646 A1 EP4217646 A1 EP 4217646A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lighting device
- light
- light module
- stop
- fresnel lens
- 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.)
- Pending
Links
- 238000009826 distribution Methods 0.000 claims abstract description 20
- 230000003287 optical effect Effects 0.000 claims abstract description 17
- 238000009434 installation Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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
- F21S41/40—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
- F21S41/10—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
-
- 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
- F21S41/25—Projection lenses
- F21S41/265—Composite lenses; Lenses with a patch-like shape
-
- 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 lighting device for a motor vehicle headlight, which lighting device comprises the following:
- 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,
- 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 in the are arranged substantially 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,
- 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 Aperture edge of the beam diaphragm contributes to the generation of a light distribution.
- 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 allows 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 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.
- 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 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”, “rear”. “, “under it”, “above it” etc. to a proper installation position of the projection module in question in a motor vehicle headlight.
- displaced horizontally and/or vertically includes a displacement in a horizontal plane or a vertical plane, i.e. the focal points can also be displaced along or in the direction of the optical axis.
- the beam stop to have a longitudinal axis, with the longitudinal axis of the beam stop being arranged in a horizontal plane when the lighting device is installed in a motor vehicle headlight, and with the optically relevant stop edge being set up to produce an asymmetrical light-dark boundary, and wherein the first calibration module, in combination with the optically relevant aperture edge of the beam aperture, contributes to the generation of a low-beam light 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 a side view of an exemplary lighting device with a projection lens designed as a Fresnel lens, the Fresnel lens comprising a plurality of steps which are essentially concentric with one another, and
- Fig. 2 is a cross-sectional view of a stage of the Fresnel lens of Fig. 1.
- Fig. 1 shows an exemplary lighting device 10 for a motor vehicle headlight, which lighting device comprises 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 can be seen more clearly in FIG.
- 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.
- the lighting device 10 further comprises a beam diaphragm 400 with a longitudinal axis, the longitudinal axis of the beam diaphragm 400 being arranged in a horizontal plane when the lighting device 100 is installed in a motor vehicle headlight, the beam diaphragm 400 having an optically relevant diaphragm edge 410 for generating an asymmetrical light Includes dark-boundary, where 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”, “rear”. “, “underneath”, “above” etc. to a proper installation position of the subject lighting device in a motor vehicle headlight.
- each step 320 is curved and has a focal point Fl, F2, F3, F4, which focal point Fl, F2, F3, F4 is arranged horizontally and/or vertically offset from the optical axis A of the Fresnel lens, and where adjacent stages 320 have 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 Figure 2, the exemplary step is formed with a convex major surface 320a.
- the exemplary lighting device from FIG. 1 comprises 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 .
Abstract
A lighting device (10) for a motor vehicle headlamp comprises the following: • - a first light module (100) for generating a light distribution, • - a beam stop (400) which comprises an optically relevant stop edge (410) for generating a light/dark boundary, • - a projection lens (300) with an optical axis (A), which is configured to image the light generable by the first light module (100) in front of the lighting device (10), wherein the projection lens (300) is designed as a Fresnel lens which comprises a main body (310) and a plurality of ring-shaped steps (320) arranged on the main body (310), with each step (320) having a main face (320a) for projecting the light beams of the at least one light module (100) to in front of the lighting device (10) and a slope face (320b) extending from the main body (310) to the main face (320a), the main face (320a) of each step (320) having a curved form and having a focus (F1, F2, F3, F4) which is arranged horizontally and/or vertically displaced from the optical axis of the Fresnel lens, and adjacent steps (320) having different foci (F1, F2, F3, F4) from one another.
Description
BELEUCHTUNGSVORRICHTUNG FÜR EINEN KRAFTFAHRZEUGSCHEINWERFER LIGHTING DEVICE FOR A CAR HEADLIGHT
Die Erfindung betrifft eine Beleuchtungsvorrichtung für einen Kraftfahrzeugscheinwerfer, welche Beleuchtungsvorrichtung Folgendes umfasst: The invention relates to a lighting device for a motor vehicle headlight, which lighting device comprises the following:
- 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, - 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,
- 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, - 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 in the are arranged substantially 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,
- 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. - 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 Aperture edge of the beam diaphragm 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.
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. A Fresnel lens (more precisely: Fresnel Fresnel lens) is an optical lens that allows the construction of large and thick lenses with a short focal length without the weight and bulk of conventional lenses. 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 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 installation 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 dar stellt, 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 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", "rear". ", "under it", "above it" 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 noted that the wording "displaced horizontally and/or vertically" includes a displacement in a horizontal plane or a vertical plane, i.e. the focal points can also be displaced along or in the direction of the optical axis.
Es kann vorgesehen sein, dass die Strahlenblende eine Eängsachse aufweist, wobei die Eängsachse 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 Eichtmodul in Kombination mit der optisch relevanten Blendenkante der Strahlenblende zur Erzeugung einer Abblendlichtverteilung mitwirkt. Provision can be made for the beam stop to have a longitudinal axis, with the longitudinal axis of the beam stop being arranged in a horizontal plane when the lighting device is installed in a motor vehicle headlight, and with the optically relevant stop edge being set up to produce an asymmetrical light-dark boundary, and wherein the first calibration module, in combination with the optically relevant aperture edge of the beam aperture, contributes to the generation of a low-beam light 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.
Es kann vorgesehen sein, dass das zweite Lichtmodul an einer Unterseite der Strahlenblende angeordnet ist. 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. 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 iim, vorzugsweise kleiner als 10 pm, vorzugsweise kleiner als 5 pm, 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 from adjacent step edges, preferably less than 10 μm, preferably less than 5 μm.
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 The invention is explained in more detail below with reference to exemplary drawings. Here shows
Fig. 1 eine Seitenansicht einer beispielhaften Beleuchtungsvorrichtung mit einer als Fresnellinse ausgebildeten Projektionslinse, wobei die Fresnellinse mehrere im Wesentlichen zueinander konzentrische Stufen umfasst, und 1 shows a side view of an exemplary lighting device with a projection lens designed as a Fresnel lens, the Fresnel lens comprising a plurality of steps which are essentially concentric with one another, and
Fig. 2 eine Querschnittansicht einer Stufe der Fresnellinse aus Fig. 1. Fig. 2 is a cross-sectional view of a stage of the Fresnel lens of Fig. 1.
Fig. 1 zeigt eine beispielhafte Beleuchtungsvorrichtung 10 für einen Kraftfahrzeugscheinwerfer, welche Beleuchtungsvorrichtung ein erstes Lichtmodul 100 mit zumindest einer Lichtquelle zur Erzeugung einer Abblendlichtverteilung in Richtung einer Hauptabstrahlrichtung umfasst, wobei das erste Lichtmodul 100 eingerichtet ist, Lichtstrahlen in eine Hauptabstrahlrichtung zu emittieren. Fig. 1 shows an exemplary lighting device 10 for a motor vehicle headlight, which lighting device comprises 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.
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.
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 Fig. 2 deutlicher zu sehen ist. Furthermore, 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 can be seen more clearly in FIG.
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 pm, vorzugsweise kleiner als 10 pm, vorzugsweise kleiner als 5 pm, aufweisen. In addition, 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 μm from adjacent step edges 320c, preferably less than 10 μm, preferably less than 5 μm.
Weiter umfasst die Beleuchtungs Vorrichtung 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. The lighting device 10 further comprises a beam diaphragm 400 with a longitudinal axis, the longitudinal axis of the beam diaphragm 400 being arranged in a horizontal plane when the lighting device 100 is installed in a motor vehicle headlight, the beam diaphragm 400 having an optically relevant diaphragm edge 410 for generating an asymmetrical light Includes dark-boundary, where the aperture edge 410 intersects the optical axis A of the Fresnel lens.
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 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.
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", "rear". ", "underneath", "above" etc. to a proper installation position of the subject lighting device in a motor vehicle headlight.
Die Hauptfläche 320a jeder Stufe 320 ist gekrümmt ausgebildet und weist jeweils einen Brennpunkt Fl, F2, F3, F4 auf, welcher Brennpunkt Fl, 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 Fl, F2, F3, F4 aufweisen.
Wie in Fig. 1 zu sehen ist, ist der äußersten Stufe der Fresnellinse ein Brennpunkt Fl, der nächst innenliegenden Stufe ein Brennpunkt F2 usw. zugeordnet. The main surface 320a of each step 320 is curved and has a focal point Fl, F2, F3, F4, which focal point Fl, F2, F3, F4 is arranged horizontally and/or vertically offset from the optical axis A of the Fresnel lens, and where adjacent stages 320 have different focal points F1, F2, F3, F4. As can be seen in FIG. 1, 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.
Die gekrümmten Hauptflächen 320a der Stufen können konvex oder konkav ausgebildet sein; in Fig. 2 ist die beispielhafte Stufe mit einer konvexen Hauptfläche 320a ausgebildet. The curved major surfaces 320a of the steps may be convex or concave; in Figure 2, the exemplary step is formed with a convex major surface 320a.
Ferner umfasst die beispielhafte Beleuchtungsvorrichtung aus Fig. 1 ein zweites Lichtmodul 200 mit zumindest einer Lichtquelle zur Erzeugung einer Fernlichtverteilung, wobei das zweite Lichtmodul 200 an einer Unterseite der Strahlenblende 400 angeordnet ist.
Furthermore, the exemplary lighting device from FIG. 1 comprises 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 .
LISTE DER BEZUGSZEICHENLIST OF REFERENCE MARKS
Beleuchtungsvorrichtung... 10 Lighting device... 10
Erstes Lichtmodul... 100 First light module... 100
Zweites Lichtmodul... 200Second light module... 200
Projektionslinse... 300Projection lens... 300
Basiskörper... 310 Base body... 310
Stufe... 320Level... 320
Hauptfläche... 320aMain surface... 320a
Steigungsfläche... 320bSlope surface... 320b
Stufenkante.... 320cStep edge.... 320c
Strahlenblende... 400Beam stop... 400
Blendenkante... 410Aperture edge... 410
Brennpunkt... Fl, F2, F3, F4
Focus... Fl, F2, F3, F4
Claims
1. Beleuchtungs Vorrichtung (10) für einen Kraftfahrzeugscheinwerfer, welche Beleuchtungsvorrichtung (10) Folgendes umfasst: 1. Lighting device (10) for a motor vehicle headlight, which lighting device (10) comprises the following:
- zumindest ein erstes Lichtmodul (100) mit zumindest einer Lichtquelle zur Erzeugung einer Lichtverteilung in Richtung einer Hauptabstrahlrichtung, wobei das erste Lichtmodul (100) eingerichtet ist, Lichtstrahlen in eine Hauptabstrahlrichtung zu emittieren, - at least one first light module (100) with at least one light source for generating a light 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,
- 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, welche Fresnellinse einen Basiskörper (310) und mehrere an dem Basiskörper (310) angeordnete, ringförmige Stufen (320) umfasst, 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, - 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 , which 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 substantially concentrically with one another, each step (320) having a main surface (320a) for projection which has the light beams of the at least one light module (100) in front of the lighting device (10) and an inclined surface (320b) extending from the base body (310) to the main surface (320a),
- eine Strahlenblende (400), wobei die Strahlenblende (400) eine optisch relevante Blendenkante (410) zur Erzeugung einer Hell- Dunkel-Grenze umfasst, wobei die Blendenkante (410) die optische Achse (A) der Fresnellinse schneidet, und wobei das erste Lichtmodul (100) an einer Oberseite der Strahlenblende angeordnet ist und in Kombination mit der optisch relevanten Blendenkante (410) der Strahlenblende (400) zur Erzeugung einer Lichtverteilung mitwirkt, dadurch gekennzeichnet, dass die Hauptfläche (320a) jeder Stufe (320) gekrümmt ausgebildet ist und zumindest einen Brennpunkt (Fl, F2, F3, F4) aufweist, welcher Brennpunkt (Fl, 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 (Fl, F2, F3, F4) aufweisen.
9 - a beam stop (400), wherein the beam stop (400) comprises an optically relevant stop edge (410) for generating a light-dark boundary, the stop edge (410) intersecting the optical axis (A) of the Fresnel lens, and wherein the first The 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 light distribution, characterized in that the main surface (320a) of each step (320) is curved and has at least one focal point (Fl, F2, F3, F4), which focal point (Fl, F2, F3, F4) is shifted horizontally and/or vertically from the optical axis (A) of the Fresnel lens, and wherein adjacent steps (320 ) have different foci (Fl, F2, F3, F4). 9
2. Beleuchtungsvorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass die Strahlenblende eine Längsachse aufweist, wobei die Längsachse der Strahlenblende (400) in einem eingebauten Zustand der Beleuchtungsvorrichtung (100) 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 (100) in Kombination mit der optisch relevanten Blendenkante (410) der Strahlenblende (400) zur Erzeugung einer Abblendlichtverteilung mitwirkt. 2. The lighting device as claimed in claim 1, characterized in that the beam stop has a longitudinal axis, the longitudinal axis of the beam stop (400) being arranged in a horizontal plane when the lighting device (100) is installed in a motor vehicle headlight, and the optically relevant stop edge being set up is to generate an asymmetrical light-dark boundary, and wherein the first light module (100) in combination with the optically relevant aperture edge (410) of the beam aperture (400) contributes to the generation of a low beam distribution.
3. Beleuchtungsvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Beleuchtungsvorrichtung (10) zumindest ein zweites Lichtmodul (200) mit zumindest einer Lichtquelle zur Erzeugung einer Fernlichtverteilung umfasst. 3. Lighting device according to claim 1 or 2, characterized in that the lighting device (10) comprises at least one second light module (200) with at least one light source for generating a high beam distribution.
4. Beleuchtungsvorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass das zweite Lichtmodul (200) an einer Unterseite der Strahlenblende (400) angeordnet ist. 4. Lighting device according to claim 3, characterized in that the second light module (200) is arranged on an underside of the beam diaphragm (400).
5. Beleuchtungsvorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Hauptfläche (320a) der Stufen (320a) konvex oder konkav ausgebildet ist. 5. Lighting device according to one of claims 1 to 4, characterized in that the main surface (320a) of the steps (320a) is convex or concave.
6. Beleuchtungsvorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Hauptfläche (320a) und die Steigungsfläche (320b) einer Stufe (320) in einer gemeinsamen Flächenschnittlinie eine Stufenkante (320c) ausbilden, wobei die Stufenkanten (320c) von benachbarten Stufenkanten (320c) einen Abstand kleiner als 20 pm aufweisen, vorzugsweise kleiner als 10 pm, vorzugsweise kleiner als 5 pm. 6. Lighting device according to one of claims 1 to 5, characterized in that the main surface (320a) and the inclined surface (320b) of a step (320) form a step edge (320c) in a common surface intersection line, the step edges (320c) of adjacent ones Step edges (320c) have a distance of less than 20 pm, preferably less than 10 pm, preferably less than 5 pm.
7. Kraftfahrzeugscheinwerfer mit zumindest einer Beleuchtungsvorrichtung (10) gemäß einem der Ansprüche 1 bis 6.
7. Motor vehicle headlight with at least one lighting device (10) according to one of claims 1 to 6.
Applications Claiming Priority (2)
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 |
Publications (1)
Publication Number | Publication Date |
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EP4217646A1 true EP4217646A1 (en) | 2023-08-02 |
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 Before (1)
Application Number | Title | Priority Date | Filing Date |
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EP20198393.9A Withdrawn EP3974710A1 (en) | 2020-09-25 | 2020-09-25 | Lighting device for a motor vehicle headlight |
Country Status (6)
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US (1) | US11965632B2 (en) |
EP (2) | EP3974710A1 (en) |
JP (1) | JP2023543194A (en) |
KR (1) | KR20230036131A (en) |
CN (1) | CN116324272A (en) |
WO (1) | WO2022063459A1 (en) |
Families Citing this family (3)
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KR102489648B1 (en) | 2021-02-24 | 2023-01-18 | 현대모비스 주식회사 | Lamp for automobile and automobile including the same |
KR20220170280A (en) | 2021-06-22 | 2022-12-29 | 현대모비스 주식회사 | Lamp for vehicle and vehicle including the same |
DE102022124019A1 (en) * | 2022-09-20 | 2024-03-21 | HELLA GmbH & Co. KGaA | Headlights for a motor vehicle |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10129743C2 (en) * | 2001-06-20 | 2003-05-08 | Daimler Chrysler Ag | Vehicle headlight, with a number of electronic lighting elements as the light source |
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 |
JP4205048B2 (en) * | 2004-02-26 | 2009-01-07 | 株式会社小糸製作所 | Vehicle headlamp |
US20060250811A1 (en) * | 2005-05-05 | 2006-11-09 | Hsiang-Chen Wu | Head light assembly with Fresnel lens |
DE102005039808A1 (en) | 2005-08-22 | 2007-03-15 | Docter Optics Gmbh | Headlight lens for a vehicle headlight |
JP5537989B2 (en) * | 2010-02-24 | 2014-07-02 | スタンレー電気株式会社 | Headlamp and bifocal lens |
JP2013186951A (en) * | 2012-03-06 | 2013-09-19 | Koito Mfg Co Ltd | Lighting fixture for vehicle |
US20190195455A1 (en) * | 2017-12-22 | 2019-06-27 | Industrial Technology Research Institute | Headlight device |
EP3974712A1 (en) * | 2020-09-23 | 2022-03-30 | ZKW Group GmbH | Lighting device for a motor vehicle headlight |
-
2020
- 2020-09-25 EP EP20198393.9A patent/EP3974710A1/en not_active Withdrawn
-
2021
- 2021-07-22 EP EP21743214.5A patent/EP4217646A1/en active Pending
- 2021-07-22 WO PCT/EP2021/070587 patent/WO2022063459A1/en unknown
- 2021-07-22 US US18/026,323 patent/US11965632B2/en active Active
- 2021-07-22 KR KR1020237004429A patent/KR20230036131A/en unknown
- 2021-07-22 CN CN202180065317.1A patent/CN116324272A/en active Pending
- 2021-07-22 JP JP2023518481A patent/JP2023543194A/en active Pending
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EP3974710A1 (en) | 2022-03-30 |
KR20230036131A (en) | 2023-03-14 |
US11965632B2 (en) | 2024-04-23 |
US20230358385A1 (en) | 2023-11-09 |
WO2022063459A1 (en) | 2022-03-31 |
CN116324272A (en) | 2023-06-23 |
JP2023543194A (en) | 2023-10-13 |
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