EP2484958B1 - Light module of a motor vehicle headlamp - Google Patents
Light module of a motor vehicle headlamp Download PDFInfo
- Publication number
- EP2484958B1 EP2484958B1 EP12150542.4A EP12150542A EP2484958B1 EP 2484958 B1 EP2484958 B1 EP 2484958B1 EP 12150542 A EP12150542 A EP 12150542A EP 2484958 B1 EP2484958 B1 EP 2484958B1
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- European Patent Office
- Prior art keywords
- light
- glare
- dark boundary
- scattering
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
- F21S41/68—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens
- F21S41/683—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens by moving screens
- F21S41/698—Shaft-shaped screens rotating along its longitudinal axis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/37—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors characterised by their material, surface treatment or coatings
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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
- 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
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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
- F21S41/17—Discharge light sources
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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 present invention relates to a light module of a motor vehicle headlight.
- the light module comprises at least one light source for emitting light, at least one primary optics for bundling at least part of the emitted light, at least one secondary optics for projecting at least a part of the bundled light as light distribution onto a roadway in front of the motor vehicle and at least one between the at least one primary optics and the at least one secondary optics arranged in the beam path aperture arrangement.
- the at least one diaphragm arrangement has at least one edge, which images the secondary optics as a light-dark boundary of the light distribution on the roadway.
- Such light modules are in various embodiments of the prior art, for example DE 10 2005 041 196 A1 , known. So is, for example, from the DE 10 2008 015 246 A1 a light module is known, which has a semiconductor light source, for example. A light emitting diode (LED), and in which the primary optics as a Half-shell reflector is formed. The secondary optics are a projection lens.
- the diaphragm arrangement comprises a substantially horizontally oriented diaphragm element whose front edge forms a light-dark boundary of the light distribution.
- a light module which has a plurality of semiconductor light sources, for example light-emitting diodes (LEDs), and a half-shell reflector as primary optics.
- the secondary optics is designed as a projection lens and the diaphragm arrangement comprises a substantially horizontally oriented diaphragm element whose front edge forms a light-dark boundary of the light distribution.
- a light module having a semiconductor light source, for example.
- the secondary optics is designed as a projection lens and the diaphragm arrangement comprises a substantially horizontally oriented diaphragm element whose leading edge forms a light-dark boundary of the light distribution.
- this document proposes, on the mirrored upper side of the diaphragm element in the region of the leading edge, an essentially transverse to an optical axis of the light module form extending shading element that is to shade a part of those light rays that would otherwise, ie without the shading element, the area on the opposite side of the light below the light-dark boundary of the light distribution would illuminate.
- intensity maxima above the light-dark boundary of a dimmed light distribution.
- intensity maxima are disturbing in the light distribution above the light-dark boundary for the driver of the motor vehicle, these intensity maxima also lead to dazzling of other road users, in particular of oncoming road users.
- the present invention therefore based on the object to design a lighting module of a motor vehicle headlamp of the type mentioned and further that unwanted and uncontrollable intensity maxima above the bright-dark boundary of a dimmed light distribution caused by unwanted reflections on the surface of the diaphragm assembly be reduced, if possible even avoided.
- a light module is proposed according to claim 1.
- a targeted reduction of unwanted reflections on the surface of the diaphragm assembly can be achieved.
- those areas of the surface are provided with the light-scattering and / or light-absorbing elements, where incident light beams are reflected in such a way that, without the light-scattering and / or light-absorbing elements in the resulting light distribution, they would generate areas with unintentionally or unacceptably high intensity maxima.
- the light module according to the invention preferably produces a dimmed light distribution with an asymmetrical horizontal light-dark boundary.
- This comprises on the oncoming traffic side a first horizontal section and on the own traffic side a second horizontal section, wherein the second section is arranged higher than the first section.
- a transition is provided which, for example, is designed as a step, but preferably as a third section rising obliquely from the oncoming traffic side to its own traffic side.
- the increase of the third section is in particular 15 °.
- unwanted reflections at the diaphragm surfaces may lead to increased light intensity values above the legally prescribed position of the light-dark boundary.
- the regions of increased light intensity values above the light-dark boundary are, for example, above the first section of the light-dark boundary on the oncoming traffic side in the vicinity of a break point between the first section and the obliquely rising third section and / or above the third section.
- the light unintentionally reflected by reflections on the aperture arrangement in these areas above the light-dark boundary is scattered or absorbed by the present invention, so that pronounced intensity maxima are avoided or shadowed so that no or only less light falls on the shadowed areas of the aperture arrangement , which are responsible for the unwanted reflections.
- a light module can have an aperture arrangement of any design. It is conceivable, for example, that the diaphragm arrangement comprises a substantially horizontally oriented diaphragm element whose front edge forms the light-dark boundary of the light distribution. Such a diaphragm arrangement is in itself, for example, from the DE 10 2008 036 192 A1 known. However, the diaphragm arrangement according to the invention has a roller-shaped diaphragm element which is rotatable about a rotational axis arranged substantially horizontally and perpendicular to an optical axis of the light module, on the circumferential surface of which different contours are formed as edges for forming the light-dark boundary of the light distribution. Such a light module is in itself, for example, from the date of the present application not yet published DE 10 2010 025 557 known. On the mentioned References will be made in terms of the design and operation of the various aperture arrangements express reference.
- the light-diffusing and / or light-absorbing elements are formed and arranged on the surface of the diaphragm assembly to reduce an intensity of light reflections caused by light rays incident flatly on the surface of the diaphragm assembly.
- the intensity of light reflections is to be reduced which are caused by light rays incident on the diaphragm arrangement at an angle of 60 ° to 90 ° with respect to a surface normal of the surface of the diaphragm arrangement.
- the light-scattering and / or light-absorbing elements of the light module according to the invention are designed such that the light reflected from the surface of the diaphragm arrangement in the region of the elements does not produce pronounced intensity maxima above the light-dark boundary of the resulting dimmed light distribution.
- the light-scattering and / or light-absorbing elements comprise form elements which shade reflections of light rays from certain directions, so that they do not penetrate the regions of light distribution above the light-dark boundary, in particular immediately above the horizontal section of the light source Bright-dark border near the break point between the first section on the oncoming traffic side and the rising third section, as well as in the area of the light distribution above the obliquely rising third section can pass.
- the light-shading form elements on the surface of the diaphragm arrangement are specifically designed and arranged such that they avoid or at least reduce light reflections that would lead to pronounced light intensity maxima above the light-dark boundary of the dimmed light distribution without the shading elements.
- the reflected light which is shaded by the shaped elements may be absorbed by the latter, simply reflected on a smooth surface of the molded elements, or scattered on a surface of the molded elements provided with a corresponding structure, in particular a microstructure.
- the lichtabschattenden mold elements are inventively formed cylinder section.
- the mold elements preferably have a height of 0.05 mm to 1 mm.
- the height of the form elements can vary over the longitudinal extent.
- the light-diffusing and / or light-absorbing elements are preferably applied to the surface of the diaphragm arrangement by a method which is suitable for low-cost, automated mass production. It is conceivable that negative forms of the light-scattering and / or light-absorbing elements are introduced with the means and processes mentioned in a used for the production of the diaphragm assembly tool or a corresponding tool insert, so that the diaphragm assemblies produced therewith immediately after manufacture without that one further processing step requires the provided light-diffusing and / or light-absorbing elements at the intended locations.
- the diaphragm assembly is made of plastic as a base material.
- the light-scattering and / or light-absorbing elements can be applied in a particularly simple and cost-effective manner to a diaphragm arrangement made of plastic.
- a plastic diaphragm assembly has a lower weight and causes in a mass production of the diaphragm assembly, for example. By injection molding, low cost. Also conceivable is a production of the diaphragm arrangement according to a metal die casting or a metal injection molding process.
- an inventive light module according to a first preferred embodiment is designated in its entirety by the reference numeral 10.
- the light module 10 can either alone or together with other light modules and / or additional light modules for generating any lighting function, for example. Position light, daytime running lights or flashing light, be arranged in a housing of a motor vehicle headlight.
- the light module serves to generate any desired headlight function, in particular also a dimmed light distribution with a horizontal light-dark boundary, for example a dipped beam or a fog light.
- the light module 10 may be fixedly mounted in the housing or movably mounted.
- a dynamic cornering light function or - if the light module 10 is able to do so - a partial remote light function can be realized.
- a partial remote light function the area in front of the motor vehicle is illuminated with a high beam distribution.
- Other road users in front of the motor vehicle, in particular preceding and oncoming road users, are for example detected by a camera and the corresponding areas in the high beam distribution are shaded so that glare of the detected road users is prevented with the best possible illumination of the road.
- the light module 10 includes at least one light source 12, in the illustrated embodiment, a gas discharge lamp, the glass bulb 14 and the ignitor 16 are designated. Furthermore, the light module 10 comprises at least one primary optics 18 for bundling at least part of the light emitted by the light source 12. In the illustrated embodiment, the primary optics 18 includes a reflector surrounding the light-emitting glass bulb 14 of the gas discharge lamp 12. The reflector 18 is preferably ellipsoid-shaped or ellipsoid-like, in particular designed as a free-form reflector. Furthermore, the light module 10 comprises at least one secondary optics 20 for projecting at least a part of the light bundled by the reflector 18 as light distribution onto a roadway in front of the motor vehicle.
- the secondary optics 20 is formed as a projection lens.
- the illustrated light module 10 is also referred to as a projection module due to its imaging properties.
- the projection lens 20 is fixed by means of a lens holder 22 to a front edge 24 of the reflector 18.
- the diaphragm arrangement 26 has a roller-shaped diaphragm element which is rotatable about an axis of rotation 30 that is essentially horizontal and perpendicular to an optical axis 28 of the light module 10.
- the roller-shaped diaphragm element 26 On a peripheral surface of the roller-shaped diaphragm element 26 are different Contours are formed as edges 40 to form a light-dark boundary of the resulting light distribution.
- a portion of the projection lens 20 and the lens holder 22 has been cut out to make the aperture assembly 26 more visible.
- the diaphragm assembly 26 is rotated about the axis of rotation 30 by means of an actuating unit 32.
- the actuating unit 32 comprises, in particular, an electric motor 34, for example a stepping motor and a gear unit 36, which in the illustrated embodiment is designed as a spur gear.
- light module 10 generates a dimmed light distribution, for example.
- This light distribution is projected in a light exit direction 38 from the projection lens 20 onto the road ahead of the motor vehicle.
- the projection lens 20 forms, in particular, the edge 40 of the diaphragm arrangement 26 arranged in the beam path as light-dark boundary of the resulting light distribution on the roadway in front of the vehicle.
- the light-dark boundary is preferably formed as a so-called asymmetric light-dark boundary having on the oncoming traffic side a first horizontal section and on the own traffic side a second horizontal section, wherein the second section is positioned higher than the first section.
- a third section may be formed as a transition between the first section and the second section either stepwise or obliquely, preferably with a 15 ° rise.
- a possible embodiment of the roller-shaped diaphragm element 26 is shown in FIG. 2a shown enlarged.
- FIG. 2b shows another possible embodiment of the roller element 26th
- the surface 42 may be mirror-coated at least in some areas. This can be achieved by polishing the surface 42 or by coating with any reflective layer.
- a light module with such a mirrored diaphragm arrangement is, for example, from the post-published DE 10 2010 033 903 known. In this document, reference is expressly made with respect to the design and operation of the mirrored aperture arrangement.
- the surface 42 of the diaphragm assembly 26 has reflective properties with and without mirroring.
- FIG. 8 is shown by a conventional, known from the prior art light module with diaphragm arrangement Abbleriumtverander 202 shown how it results on a at a distance to the motor vehicle headlamp, in particular at a distance of 25m, arranged measuring screen 200.
- Abbleriumtverander 202 shown how it results on a at a distance to the motor vehicle headlamp, in particular at a distance of 25m, arranged measuring screen 200.
- HH and a vertical axis VV is drawn on the measuring screen 200.
- a horizontal axis HH and a vertical axis VV is drawn.
- FIG. 8 only a portion of the low beam distribution 202 is shown in a range between -10 ° and + 10 ° horizontally and -3 ° and + 1 ° vertically. Areas of the same illuminance of the low-beam light distribution 202 are illustrated by so-called isolux lines 204.
- FIG. 8 is shown by a conventional, known from the prior art light module with dia
- the light-dark boundary 206 includes a first horizontal section 208 on the oncoming traffic side, which runs vertically in the range between -0.5 ° and -0.7 °.
- the first horizontal section 208 of the light-dark boundary 206 extends from the oncoming traffic side coming approximately to the vertical VV. From there, the light-dark boundary 206 then rises in a section 210 approximately at a 15 ° angle.
- the course of the horizontal portion 208 on the oncoming traffic side and the rising portion 210 is prescribed by law.
- a second horizontal section 212 is provided on the own traffic side, which runs above the first section 208 and above the horizontal HH.
- the second portion 212 extends approximately between + 0.4 ° and + 0.7 ° vertically. Arrangement and course of this second section 212 are not prescribed by law.
- higher illuminance values of the low-beam light distribution 202 are in the vicinity of the vertical VV, in particular in a range between -4 ° and + 3 ° horizontally, above the prescribed course of the sections 208 and 210 of the light-dark boundary 206.
- the region of increased light intensity above the light-dark boundary 206 is designated by reference numeral 214. Due to the high illuminance values in the region 214, the legal requirements for the low-beam light distribution 202 may under certain circumstances not be met, since permissible maximum values of the illuminance above the light-dark boundary 216 may not be complied with. Furthermore, the increased light intensity values in the area 214, in particular to the left of the vertical VV, lead to dazzling oncoming road users.
- the light in the region 214 originates from unwanted reflections on the surface 42 of the diaphragm arrangement 26. Unintended reflections on the surface 42 of the diaphragm arrangement 26 can also result in increased light intensity values further above the light-dark boundary 206 and above the region 214, in a so-called overhead region, to lead.
- the same problems arise with regard to the fulfillment of the legal requirements with regard to the maximum illuminance values above the light-dark limit 206 and with regard to the risk of dazzling oncoming road users.
- the present invention proposes a possibility such as the increased illuminance values above the light-dark boundary 206 of a dimmed light distribution 202 reduced due to unwanted reflections on the surface 42 of the diaphragm assembly 26 of a light module 10, may even be completely avoided.
- a targeted reduction in reflection on the surface 42 of the diaphragm arrangement 26 is achieved by a modified surface shape or surface structure. This results in a targeted reduction of the reflection, in particular for flat on the surface 42 incident light rays.
- low beam light distribution 202 in which virtually no light is reflected in the area 214. Instead, the light is absorbed, scattered or shadowed.
- the entire light of the low-beam light distribution 202 is, at least in the vicinity of the vertical VV, ie in a range of about -4 ° to + 4 ° horizontally, at or below the light-dark boundary 206.
- the legal requirements for a low-beam distribution 202 with respect to the above Light-dark limit 206 maximum illuminance levels can be easily met. Furthermore, glare of oncoming traffic is prevented by light in the area 214 left of the vertical VV.
- a subjectively better light-dark boundary 206 of the low beam distribution 202 can be achieved for the driver of the motor vehicle.
- the Patoscuro limit 206 is better because it - unlike the low beam distribution off FIG. 8 - Has a clearly defined, almost horizontal section 208 on the opposite side of the traffic and a comparison in contrast to significantly sloping section 210 on the own traffic side.
- the surface 42 of the diaphragm assembly 26 is at least partially provided with light-scattering and / or light-absorbing elements 44.
- the light-diffusing and / or light-absorbing elements 44 are embodied and arranged on the surface 42 so that a lower intensity of the light reflected therefrom by the diaphragm arrangement 26 results in a region 214 of the light distribution 202 above the light-dark boundary 206 than if the light-scattering and / or light scattering light-absorbing elements 44 would not be present.
- the region 214 in which the intensity of the light reflected therefrom by the diaphragm arrangement 26 has decreased, thanks to the light-diffusing and / or light-absorbing elements 44, is preferably in the vicinity of the vertical VV, in particular in a range of approximately -4 ° to +4 ° horizontal.
- the region 214 with the light intensity reduced according to the invention is preferably close to a break point between the horizontal first section 208 on the oncoming traffic side and the obliquely rising section 210 of the light-dark boundary 206.
- FIG. 3 By way of example, the reflection of a light beam 60 on a flat, smooth surface 42 is shown.
- the radiation intensity or radiation intensity of a reflected light beam 61 is relatively large.
- the length of the radiation vector 61 corresponds approximately to the intensity I 1 of the reflected light beam 61.
- the radiation intensity or radiation intensity I is the proportion of the total radiation power ⁇ that of the surface 42 is emitted in a given spatial direction into an arbitrarily small solid angle element d ⁇ , divided by d ⁇ .
- the radiation intensity I decreases. This case is, for example, in FIG. 4 where the light beam 60 is reflected on a roughened or microstructured 44 surface.
- the reflected light beam 62 thus only has a radiation intensity of I 2 which is smaller than the radiation intensity I 1 FIG. 3 is what is symbolized by the shorter radiation vector.
- the scattering is symbolized by a multitude of shorter vectors.
- FIG. 5 In turn, the reflection of a light beam 60 on a flat and smooth surface 42 of the diaphragm assembly 26 is shown.
- FIG. 6 an embodiment is shown in which configured in a first manner light-diffusing and / or light-absorbing elements 44 are arranged in the form of lichtabschattenden mold elements on the surface 42.
- the light-absorbing and / or light-scattering elements 44 are designed and arranged on the surface 42 such that a lower intensity of the light reflected therefrom by the aperture arrangement 26 results in the region 214 of the light distribution 202 above the light-dark boundary 206 than if the light-scattering and / or light-absorbing elements 44 would not be present, as in, for example, in FIG. 5 the case is.
- the form elements 44 at a shallow angle ⁇ of about 60 ° to 90 ° with respect to a surface normal 64 of the surface 42 to these incident light rays 60 after reflection on the surface 42 as reflected light rays 61 are shaded.
- the light shading features 44 preferably have a height in the range of 0.05mm to 1mm.
- the mold elements 44 are in the embodiment of FIG. 6 formed cuboid, so that a substantially flat, perpendicular to the surface 42 standing Abschattungs Type 63 of the mold elements 44 is formed, to which the reflected light beam 61 strikes.
- the surface 63 may be formed in a desired manner, for example, smoothly for reflecting the reflected light beam 61, with a roughening or microstructuring for scattering the reflected light beam 61 and / or with light-absorbing properties for absorbing the reflected light beam 61.
- FIG. 7 Further possible embodiments of the shading elements 44 are exemplified in FIG FIG. 7 shown.
- the shaped elements 44 are formed in a cross-section in the plane of the drawing in the form of a cylinder section or a spherical segment.
- the directed to the reflected light beam 61 surface 63 of the mold elements 44 thus has the shape of a cylindrical or spherical surface.
- the shaped elements 44 are cube-shaped in cross-section.
- the surface 63 of the shaped elements 44 facing the reflected light rays 61 is in this case as in the exemplary embodiment FIG. 6 planar and formed substantially perpendicular to the surface 42.
- FIG. 7c a further embodiment in which the light-absorbing form elements 44 are formed sawtooth. Also in this case, the surface 63 is substantially perpendicular to the surface 42.
- the light-scattering and / or light-absorbing elements 44 are preferably introduced into the surface 42 of the diaphragm assembly 26 by eroding, etching, blasting, laser machining or direct micro-milling.
- the diaphragm assembly 26 is preferably made of a plastic or metal as a base material.
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Description
Die vorliegende Erfindung betrifft ein Lichtmodul eines Kraftfahrzeugscheinwerfers. Das Lichtmodul umfasst mindestens eine Lichtquelle zum Aussenden von Licht, mindestens eine Primäroptik zum Bündeln zumindest eines Teils des ausgesandten Lichts, mindestens eine Sekundäroptik zum Projizieren zumindest eines Teils des gebündelten Lichts als Lichtverteilung auf eine Fahrbahn vor dem Kraftfahrzeug und mindestens eine zwischen der mindestens einen Primäroptik und der mindestens einen Sekundäroptik im Strahlengang angeordnete Blendenanordnung. Die mindestens eine Blendenanordnung weist mindestens eine Kante auf, welche die Sekundäroptik als eine Helldunkelgrenze der Lichtverteilung auf der Fahrbahn abbildet.The present invention relates to a light module of a motor vehicle headlight. The light module comprises at least one light source for emitting light, at least one primary optics for bundling at least part of the emitted light, at least one secondary optics for projecting at least a part of the bundled light as light distribution onto a roadway in front of the motor vehicle and at least one between the at least one primary optics and the at least one secondary optics arranged in the beam path aperture arrangement. The at least one diaphragm arrangement has at least one edge, which images the secondary optics as a light-dark boundary of the light distribution on the roadway.
Derartige Lichtmodule sind in unterschiedlichsten Ausführungsformen aus dem Stand der Technik, z.B. aus
Aus der
Schließlich ist aus der
Bei Scheinwerfern mit einer Blendenanordnungen kann es durch in einem bestimmten Winkel auf die Oberfläche der Blendenanordnung auftreffende Lichtstrahlen in manchen Fällen zu ungewollten Reflexionen kommen, die oberhalb der Helldunkelgrenze einer abgeblendeten Lichtverteilung helle Bereiche, sogenannte Intensitätsmaxima, erzeugen. Dies ist insbesondere dann der Fall, wenn Flächen der Blendenanordnung vor der eigentlichen Blendenebene liegen und Reflexionen erzeugen. Abgesehen davon, dass derartige Intensitätsmaxima in der Lichtverteilung oberhalb der Helldunkelgrenze für den Fahrer des Kraftfahrzeugs störend sind, führen diese Intensitätsmaxima auch zu einer Blendung anderer Verkehrsteilnehmer, insbesondere von entgegenkommenden Verkehrsteilnehmern. Ferner kann aufgrund der Intensitätsmaxima oberhalb der Helldunkelgrenze der Fall eintreten, dass für die abgeblendete Lichtverteilung gesetzlich vorgegebene Maximalwerte der Lichtstärke in dem Bereich oberhalb der Helldunkelgrenze überschritten werden und der Scheinwerfer somit nicht mehr die gesetzlichen Anforderungen erfüllt. Generell spiegeln auch Flächen, die z.B. schwarz sind, auch unter flachen Winkeln auftreffende Lichtstrahlen. Gerade bei solchen Flächen sind Spiegelungen in der Regel ungewollt und störend.In the case of headlamps with an aperture arrangement, unwanted reflections may occur in some cases due to light beams striking the surface of the aperture arrangement at a certain angle, which generate bright areas, so-called intensity maxima, above the light-dark boundary of a dimmed light distribution. This is the case in particular when surfaces of the diaphragm arrangement are located in front of the actual diaphragm plane and create reflections. Apart from the fact that such intensity maxima are disturbing in the light distribution above the light-dark boundary for the driver of the motor vehicle, these intensity maxima also lead to dazzling of other road users, in particular of oncoming road users. Furthermore, due to the intensity maxima above the light-dark boundary, the case may occur that legally stipulated maximum values of the light intensity in the region above the light-dark boundary are exceeded for the dimmed light distribution and the headlight thus no longer meets the legal requirements. In general, surfaces that are black, for example, also reflect light rays striking at shallow angles. Reflections are usually unwanted and annoying, especially in such areas.
Bei sämtlichen eingangs beschriebenen, aus dem Stand der Technik bekannten Scheinwerfern geht es nur darum, eine abgeblendete Lichtverteilung unterhalb der Helldunkelgrenze zu homogenisieren. Diese Maßnahmen haben jedoch keinerlei Auswirkungen auf ungewollte Reflexionen, die zu Intensitätsmaxima in der Lichtverteilung oberhalb der Helldunkelgrenze führen können.All the headlamps known from the prior art described at the outset are concerned only with homogenizing a dimmed light distribution below the light-dark boundary. However, these measures have no effect on unwanted reflections, which can lead to intensity maxima in the light distribution above the light-dark boundary.
Ausgehend von dem beschriebenen Stand der Technik liegt der vorliegenden Erfindung deshalb die Aufgabe zugrunde, ein Lichtmodul eines Kraftfahrzeugscheinwerfers der eingangs genannten Art dahingehend auszugestalten und weiterzubilden, dass ungewollte und unkontrollierbare Intensitätsmaxima oberhalb der Helldunkelgrenze einer abgeblendeten Lichtverteilung, die durch ungewollte Reflexionen an der Oberfläche der Blendenanordnung verursacht werden, verringert, wenn möglich sogar vermieden werden.Based on the described prior art, the present invention therefore based on the object to design a lighting module of a motor vehicle headlamp of the type mentioned and further that unwanted and uncontrollable intensity maxima above the bright-dark boundary of a dimmed light distribution caused by unwanted reflections on the surface of the diaphragm assembly be reduced, if possible even avoided.
Zur Lösung dieser Aufgabe wird ein Lichtmodul nach Anspruch 1 vorgeschlagen. Mit der vorliegenden Erfindung kann eine gezielte Verringerung ungewollter Reflexionen an der Oberfläche der Blendenanordnung erreicht werden. Dabei werden diejenigen Bereiche der Oberfläche mit den lichtstreuende und/oder lichtabsorbierenden Elementen versehen, wo auftreffende Lichtstrahlen derart reflektiert werden, dass sie ohne die lichtstreuenden und/oder lichtabsorbierenden Elemente in der resultierenden Lichtverteilung Bereiche mit ungewollt bzw. unzulässig hohen Intensitätsmaxima erzeugen würden.To solve this problem, a light module is proposed according to claim 1. With the present invention, a targeted reduction of unwanted reflections on the surface of the diaphragm assembly can be achieved. In the process, those areas of the surface are provided with the light-scattering and / or light-absorbing elements, where incident light beams are reflected in such a way that, without the light-scattering and / or light-absorbing elements in the resulting light distribution, they would generate areas with unintentionally or unacceptably high intensity maxima.
Das erfindungsgemäße Lichtmodul erzeugt vorzugsweise eine abgeblendete Lichtverteilung mit einer asymmetrischen horizontalen Helldunkelgrenze. Diese umfasst auf der Gegenverkehrsseite einen ersten horizontalen Abschnitt und auf der eigenen Verkehrsseite einen zweiten horizontalen Abschnitt, wobei der zweite Abschnitt höher angeordnet ist als der erste Abschnitt. Zwischen dem ersten und dem zweiten Abschnitt der Helldunkelgrenze ist ein Übergang vorgesehen, der bspw. als eine Stufe, vorzugsweise jedoch als ein von der Gegenverkehrsseite zur eigenen Verkehrsseite hin schräg ansteigender dritter Abschnitt ausgebildet ist. Der Anstieg des dritten Abschnitts beträgt insbesondere 15°.The light module according to the invention preferably produces a dimmed light distribution with an asymmetrical horizontal light-dark boundary. This comprises on the oncoming traffic side a first horizontal section and on the own traffic side a second horizontal section, wherein the second section is arranged higher than the first section. Between the first and the second section of the light-dark boundary, a transition is provided which, for example, is designed as a step, but preferably as a third section rising obliquely from the oncoming traffic side to its own traffic side. The increase of the third section is in particular 15 °.
Bei Blendenanordnungen kann es aufgrund von ungewollten Reflexionen an den Blendenflächen zu erhöhten Lichtstärkewerten oberhalb der gesetzlich vorgeschriebenen Lage der Helldunkelgrenze kommen. Die Bereiche erhöhter Lichtstärkewerte oberhalb der Helldunkelgrenze befinden sich bspw. oberhalb des ersten Abschnitts der Helldunkelgrenze auf der Gegenverkehrsseite in der Nähe eines Knickpunkts zwischen dem ersten Abschnitt und dem schräg ansteigenden dritten Abschnitt und/oder oberhalb des dritten Abschnitts. Das in diese Bereiche oberhalb der Helldunkelgrenze durch Reflexionen an der Blendenanordnung ungewollt reflektierte Licht wird durch die vorliegende Erfindung gestreut oder absorbiert, so dass ausgeprägte Intensitätsmaxima vermieden werden, oder abgeschattet, so dass kein oder nur noch weniger Licht auf die abgeschatteten, Bereiche der Blendenanordnung fällt, welche für die ungewollten Reflexionen verantwortlich sind. Ein Lichtmodul kann eine beliebig ausgestaltete Blendenanordnung aufweisen. Denkbar ist bspw., dass die Blendenanordnung ein im Wesentlichen horizontal ausgerichtetes Blendenelement umfasst, dessen Vorderkante die Helldunkelgrenze der Lichtverteilung bildet. Eine solche Blendenanordnung ist an sich bspw. aus der
Gemäß einer bevorzugten Ausführungsform der vorliegenden Erfindung sind die lichtstreuenden und/oder lichtabsorbierenden Elemente derart ausgebildet und auf der Oberfläche der Blendenanordnung angeordnet dass sie eine Intensität von Lichtreflexionen verringern, die durch flach auf die Oberfläche der Blendenanordnung auftreffende Lichtstrahlen verursacht sind. Dabei soll insbesondere die Intensität von Lichtreflexionen verringert werden, die durch in einem Winkel von 60° bis 90° bzgl. einer Flächennormalen der Oberfläche der Blendenanordnung auf die Blendenanordnung auftreffende Lichtstrahlen verursacht sind.According to a preferred embodiment of the present invention, the light-diffusing and / or light-absorbing elements are formed and arranged on the surface of the diaphragm assembly to reduce an intensity of light reflections caused by light rays incident flatly on the surface of the diaphragm assembly. In particular, the intensity of light reflections is to be reduced which are caused by light rays incident on the diaphragm arrangement at an angle of 60 ° to 90 ° with respect to a surface normal of the surface of the diaphragm arrangement.
Die lichtstreuenden und/oder lichtabsorbierenden Elemente des erfindungsgemäßen Lichtmoduls sind so ausgebildet, dass das von der Oberfläche der Blendenanordnung im Bereich der Elemente reflektierte Licht keine ausgeprägten Intensitätsmaxima oberhalb der Helldunkelgrenze der resultierenden abgeblendeten Lichtverteilung erzeugt.The light-scattering and / or light-absorbing elements of the light module according to the invention are designed such that the light reflected from the surface of the diaphragm arrangement in the region of the elements does not produce pronounced intensity maxima above the light-dark boundary of the resulting dimmed light distribution.
Gemäß einer anderen bevorzugten Ausführungsform der Erfindung wird vorgeschlagen, dass die lichtstreuenden und/oder lichtabsorbierenden Elemente Formelemente umfassen, welche Reflexionen von Lichtstrahlen aus bestimmten Richtungen abschatten, so dass sie nicht in die Bereiche der Lichtverteilung oberhalb der Helldunkelgrenze, insbesondere unmittelbar oberhalb des horizontalen Abschnitts der Helldunkelgrenze in der Nähe des Knickpunkts zwischen dem ersten Abschnitt auf der Gegenverkehrsseite und dem ansteigenden dritten Abschnitt, sowie in den Bereich der Lichtverteilung oberhalb des schräg ansteigenden dritten Abschnitts gelangen können. Die lichtabschattenden Formelemente auf der Oberfläche der Blendenanordnung sind gezielt derart ausgebildet und angeordnet, dass sie Lichtreflexionen vermeiden oder zumindest reduzieren, die ohne die abschattenden Formelemente zu ausgeprägten Lichtintensitätsmaxima oberhalb der Helldunkelgrenze der abgeblendeten Lichtverteilung führen würden. Eine nennenswerte Beeinflussung oder Variation der Lichtverteilung unterhalb der Helldunkelgrenze soll durch die abschattenden Formelemente bewusst nicht erfolgen. Das von den Formelementen abgeschattete reflektierte Licht kann von diesen absorbiert, an einer glatten Fläche der Formelemente einfach reflektiert oder an einer mit einer entsprechenden Struktur, insbesondere einer Mikrostruktur, versehenen Fläche der Formelemente streuend reflektiert werden.According to another preferred embodiment of the invention, it is proposed that the light-scattering and / or light-absorbing elements comprise form elements which shade reflections of light rays from certain directions, so that they do not penetrate the regions of light distribution above the light-dark boundary, in particular immediately above the horizontal section of the light source Bright-dark border near the break point between the first section on the oncoming traffic side and the rising third section, as well as in the area of the light distribution above the obliquely rising third section can pass. The light-shading form elements on the surface of the diaphragm arrangement are specifically designed and arranged such that they avoid or at least reduce light reflections that would lead to pronounced light intensity maxima above the light-dark boundary of the dimmed light distribution without the shading elements. An appreciable influence or variation of the light distribution below the light-dark boundary should deliberately not occur due to the shadowing form elements. The reflected light which is shaded by the shaped elements may be absorbed by the latter, simply reflected on a smooth surface of the molded elements, or scattered on a surface of the molded elements provided with a corresponding structure, in particular a microstructure.
Die lichtabschattenden Formelemente sind erfindungsgemäß zylinderabschnittsförmig ausgebildet. Die Formelemente weisen vorzugsweise eine Höhe von 0,05mm bis 1mm auf. Die Höhe der Formelemente kann über deren Längserstreckung variieren.The lichtabschattenden mold elements are inventively formed cylinder section. The mold elements preferably have a height of 0.05 mm to 1 mm. The height of the form elements can vary over the longitudinal extent.
Die lichtstreuenden und/oder lichtabsorbierenden Elemente werden vorzugsweise nach einem Verfahren auf die Oberfläche der Blendenanordnung aufgebracht, das sich für eine kostengünstige, automatisierte Serienfertigung eignet. Es ist denkbar, dass Negativformen der lichtstreuenden und/oder lichtabsorbierenden Elemente mit den genannten Mitteln bzw. Prozessen in ein zur Herstellung der Blendenanordnung genutztes Werkzeug bzw. einen entsprechenden Werkzeugeinsatz eingebracht werden, so dass die damit hergestellten Blendenanordnungen unmittelbar nach der Herstellung ohne dass es eines weiteren Bearbeitungsschrittes bedarf an den vorgesehenen Stellen die vorgesehenen lichtstreuenden und/oder lichtabsorbierenden Elemente aufweisen.The light-diffusing and / or light-absorbing elements are preferably applied to the surface of the diaphragm arrangement by a method which is suitable for low-cost, automated mass production. It is conceivable that negative forms of the light-scattering and / or light-absorbing elements are introduced with the means and processes mentioned in a used for the production of the diaphragm assembly tool or a corresponding tool insert, so that the diaphragm assemblies produced therewith immediately after manufacture without that one further processing step requires the provided light-diffusing and / or light-absorbing elements at the intended locations.
Schließlich wird vorgeschlagen, dass die Blendenanordnung aus Kunststoff als Grundmaterial hergestellt ist. Die lichtstreuenden und/oder lichtabsorbierenden Elemente lassen sich besonders einfach und kostengünstig auf eine Blendenanordnung aus Kunststoff aufbringen. Außerdem hat eine Kunststoff-Blendenanordnung ein geringeres Gewicht und verursacht bei einer Massenfertigung der Blendenanordnung, bspw. durch Spritzgießen, geringe Kosten. Denkbar ist auch eine Fertigung der Blendenanordnung nach einem Metall-Druckguss- oder einem Metall-Spritzguss-Verfahren.Finally, it is proposed that the diaphragm assembly is made of plastic as a base material. The light-scattering and / or light-absorbing elements can be applied in a particularly simple and cost-effective manner to a diaphragm arrangement made of plastic. In addition, a plastic diaphragm assembly has a lower weight and causes in a mass production of the diaphragm assembly, for example. By injection molding, low cost. Also conceivable is a production of the diaphragm arrangement according to a metal die casting or a metal injection molding process.
Weitere Merkmale und Vorteile der vorliegenden Erfindung werden nachfolgend anhand der Figuren näher erläutert. Dabei kann das erfindungsgemäße Lichtmodul die angegebenen Merkmale und Vorteile entweder alleine oder in einer beliebigen Kombination miteinander aufweisen. Es zeigen:
- Figur
- 1 ein erfindungsgemäßes Lichtmodul mit einem walzenförmigen Blendenelement;
- Figur 2a
- eine mögliche Ausgestaltung eines walzenförmigen Blendenelements des Lichtmoduls aus
Figur 1 ; - Figur 2b
- einen Ausschnitt einer anderen möglichen Ausgestaltung eines walzenförmigen Blendenelements des Lichtmoduls aus
Figur 1 ; Figur 3- beispielhaft einen an einer ebenen Fläche reflektierten Lichtstrahl;
- Figur 4
- beispielhaft einen an einer mit einer Aufrauung oder einer Mikrostruktur versehenen Oberfläche reflektierten Lichtstrahl;
Figur 5- beispielhaft einen an einer ebenen Fläche reflektierten Lichtstrahl;
- Figur 6
- beispielhaft einen an einer mit Licht abschottenden Formelementen versehenen Fläche reflektierten Lichtstrahl;
- Figur 7
- verschiedene weitere mögliche Ausgestaltungen von auf der Oberfläche einer Blendenanordnung ausgebildeten lichtabschattenden Formelementen;
- Figur 8
- einen Ausschnitt einer durch ein aus dem Stand der Technik bekanntes Lichtmodul erzeugten abgeblendeten Lichtverteilung auf einem Messschirm; und
- Figur 9
- einen Ausschnitt einer durch das erfindungsgemäße Lichtmodul erzeugten abgeblendeten Lichtverteilung auf dem Messschirm.
- figure
- 1 shows a light module according to the invention with a roller-shaped diaphragm element;
- FIG. 2a
- a possible embodiment of a roller-shaped diaphragm element of the light module
FIG. 1 ; - FIG. 2b
- a section of another possible embodiment of a roller-shaped diaphragm element of the light module
FIG. 1 ; - FIG. 3
- for example, a reflected light beam on a flat surface;
- FIG. 4
- by way of example, a light beam reflected on a surface provided with a roughening or a microstructure;
- FIG. 5
- for example, a reflected light beam on a flat surface;
- FIG. 6
- by way of example, a light beam reflected on a surface provided with light-separating form elements;
- FIG. 7
- various other possible embodiments of formed on the surface of a shutter arrangement lichtabschattenden mold elements;
- FIG. 8
- a section of a generated by a known from the prior art light module dimmed light distribution on a measuring screen; and
- FIG. 9
- a section of a dimmed light distribution generated by the light module according to the invention on the screen.
In
Durch eine Bewegung des Lichtmoduls 10 in horizontaler Richtung relativ zum Scheinwerfergehäuse kann eine dynamische Kurvenlichtfunktion oder - sofern das Lichtmodul 10 dazu in der Lage ist - eine Teilfernlichtfunktion realisiert werden. Bei einer Teilfernlichtfunktion wird der Bereich vor dem Kraftfahrzeug mit einer Fernlichtverteilung ausgeleuchtet. Andere Verkehrsteilnehmer vor dem Kraftfahrzeug, insbesondere vorausfahrende und entgegenkommende Verkehrsteilnehmer, werden bspw. durch eine Kamera detektiert und die entsprechenden Bereiche in der Fernlichtverteilung abgeschattet, so dass eine Blendung der detektierten Verkehrsteilnehmer bei bestmöglicher Ausleuchtung der Fahrbahn verhindert wird. Durch Bewegen des Lichtmoduls 10 in vertikaler Richtung relativ zum Scheinwerfergehäuse kann bspw. eine Regulierung der Leuchtweite erzielt werden.By a movement of the
Das Lichtmodul 10 umfasst mindestens eine Lichtquelle 12, in dem dargestellten Ausführungsbeispiel eine Gasentladungslampe, deren Glaskolben mit 14 und deren Zündgerät mit 16 bezeichnet sind. Ferner umfasst das Lichtmodul 10 mindestens eine Primäroptik 18 zum Bündeln zumindest eines Teils des von der Lichtquelle 12 ausgesandten Lichts. In dem dargestellten Ausführungsbeispiel umfasst die Primäroptik 18 einen Reflektor, der den lichtemittierenden Glaskolben 14 der Gasentladungslampe 12 umgibt. Der Reflektor 18 ist vorzugsweise elipsoidförmig oder elipsoidähnlich, insbesondere als ein Freiformreflektor ausgebildet. Ferner umfasst das Lichtmodul 10 mindestens eine Sekundäroptik 20 zum Projizieren zumindest eines Teils des von dem Reflektor 18 gebündelten Lichts als Lichtverteilung auf eine Fahrbahn vor dem Kraftfahrzeug. In dem dargestellten Ausführungsbeispiel ist die Sekundäroptik 20 als eine Projektionslinse ausgebildet. Das dargestellte Lichtmodul 10 wird aufgrund seiner abbildenden Eigenschaften auch als Projektionsmodul bezeichnet. Die Projektionslinse 20 ist mittels eines Linsenhalters 22 an einem vorderen Rand 24 des Reflektors 18 befestigt.The
Zwischen der Primäroptik 18 und der Sekundäroptik 20 ist im Strahlengang mindestens eine Blendenanordnung 26 angeordnet. In dem dargestellten Ausführungsbeispiel weist die Blendenanordnung 26 ein um eine im Wesentlichen horizontale und senkrecht zu einer optischen Achse 28 des Lichtmoduls 10 angeordnete Drehachse 30 drehbares walzenförmiges Blendenelement auf. Auf einer Umfangsfläche des walzenförmigen Blendelements 26 sind unterschiedliche Konturen als Kanten 40 zur Bildung einer Helldunkelgrenze der resultierenden Lichtverteilung ausgebildet. In der Darstellung der
Das in
Bei der Blendenanordnung 26 der
Die Oberfläche 42 der Blendenanordnung 26 hat mit und ohne Verspiegelung reflektierende Eigenschaften. Generell spiegeln auch Flächen, die an sich nicht zur Spiegelung von Lichtstrahlen ausgebildet sind, weil sie z.B. schwarz sind. Diese gilt insbesondere für unter flachen Winkeln auf die Oberflächen auftreffende Lichtstrahlen. Gerade bei solchen Flächen sind Spiegelungen in der Regel ungewollt und störend. Somit kann es unter bestimmten Umständen zu ungewünschten Reflexionen an der Oberfläche 42 kommen. Diese Reflexionen können zu erhöhten Lichtintensitätswerten oberhalb eines gesetzlichen vorgeschriebenen Verlaufs der Helldunkelgrenze der Lichtverteilung führen. Dies ist insbesondere dann problematisch, wenn durch die erhöhten Lichtintensitätswerte oberhalb der Helldunkelgrenze die gesetzlichen Anforderungen an die zulässigen Maximalwerte der Lichtstärke oberhalb der Helldunkelgrenze durch die resultierende Abblendlichtverteilung nicht erfüllt werden können. Ferner ist dies problematisch, wenn die erhöhten Lichtintensitätswerte oberhalb der Helldunkelgrenze auf einer dem Gegenverkehr zugeordneten Seite der Lichtverteilung auftreten, da sie zu einer Blendung entgegenkommender Verkehrsteilnehmer führen können.The
In
Wie man anhand der
Das Licht in dem Bereich 214 stammt von ungewollten Reflexionen an der Oberfläche 42 der Blendenanordnung 26. Ungewollte Reflexionen an der Oberfläche 42 der Blendenanordnung 26 können auch zu erhöhten Lichtintensitätswerten weiter oberhalb der Helldunkelgrenze 206 und oberhalb des Bereichs 214, in einem sogenannten Overhead-Bereich, führen. Auch hier ergeben sich die gleichen Probleme hinsichtlich der Erfüllung der gesetzlichen Anforderungen bezüglich der maximalen Beleuchtungsstärkewerte oberhalb der Helldunkelgrenze 206 und hinsichtlich der Gefahr einer Blendung entgegenkommender Verkehrsteilnehmer.The light in the
Die vorliegende Erfindung schlägt eine Möglichkeit vor, wie die erhöhten Beleuchtstärkewerte oberhalb der Helldunkelgrenze 206 einer abgeblendeten Lichtverteilung 202 aufgrund von ungewollten Reflexionen an der Oberfläche 42 der Blendenanordnung 26 eines Lichtmoduls 10 verringert, unter Umständen sogar ganz vermieden werden können. Erfindungsgemäß wird eine gezielte Reflexionsminderung auf der Oberfläche 42 der Blendenanordnung 26 durch eine modifizierte Oberflächenform oder Oberflächenstruktur erreicht. Dadurch ergibt sich eine gezielte Verringerung der Reflexion, insbesondere für flach auf die Oberfläche 42 auftreffende Lichtstrahlen.The present invention proposes a possibility such as the increased illuminance values above the light-
Für das erfindungsgemäße Lichtmodul 10 ergibt sich die in
Um das durch ungewollte Reflexionen an der Oberfläche 42 in den Bereich 214 gelangende Licht zu verringern bzw. ganz zu vermeiden, wird gemäß der vorliegenden Erfindung vorgeschlagen, dass die Oberfläche 42 der Blendenanordnung 26 zumindest teilweise mit lichtstreuenden und/oder lichtabsorbierenden Elementen 44 versehen ist. Die lichtstreuenden und/oder lichtabsorbierenden Elemente 44 sind derart ausgebildet und auf der Oberfläche 42 angeordnet, dass sich in einem Bereich 214 der Lichtverteilung 202 oberhalb der Helldunkelgrenze 206 eine geringere Intensität des von der Blendenanordnung 26 dorthin reflektierten Lichts ergibt als wenn die lichtstreuenden und/oder lichtabsorbierenden Elemente 44 nicht vorhanden wären.In order to reduce or avoid the light reaching the
Der Bereich 214, in dem sich die Intensität des von der Blendenanordnung 26 dorthin reflektierten Lichts dank der lichtstreuenden und/oder lichtabsorbierenden Elemente 44 verringert hat, liegt vorzugsweise in der Nähe der Vertikalen VV, insbesondere in einem Bereich von etwa -4° bis +4° horizontal. Bei einer asymmetrischen Helldunkelgrenze 206 liegt der Bereich 214 mit der erfindungsgemäß verringerten Lichtintensität vorzugsweise in der Nähe eines Knickpunkts zwischen dem horizontalen ersten Abschnitt 208 auf der Gegenverkehrsseite und dem schräg ansteigenden Abschnitt 210 der Helldunkelgrenze 206.The
In
In
Weitere mögliche Ausführungsformen der lichtabschattenden Formelemente 44 sind beispielhaft in
Die lichtstreuenden und/oder lichtabsorbierenden Elemente 44, d.h. die Aufrauung oder die Mikrostrukturierung der Oberfläche 42 aus dem Ausführungsbeispiel der
Claims (5)
- A light module (10) of a headlamp of a motor vehicle, the light module (10) including at least one light source (12) for emitting light, at least one primary optical system (18) for focusing at least some of the emitted light, at least one secondary optical system (20) for projecting at least some of the focused light as a light distribution (202) onto the roadway ahead of the motor vehicle, and at least one glare-reduction assembly (26), located between the at least one primary optical system (18) and the at least one secondary optical system (20) in the beam path, wherein the at least one glare-reduction assembly (26) has at least one edge (42), which projects the secondary optical system (20) as a light/dark boundary (206) of the light distribution (202) on the roadway, and a surface (42) of the glare-reduction assembly (26) is at least provided with light-scattering and/or light-absorbing elements (44), which are embodied and located such that, in a region (214) of the light distribution (202) above the light/dark boundary (206), a lesser intensity of the light reflected in that direction by the glare-reduction assembly (26) results than when the light-scattering and/or light-absorbing elements (44) were not present, and the region (214), in which the intensity of the light reflected toward it by the glare-reduction assembly (26) has decreased, thanks to the light-scattering and/or light-absorbing elements (44), is located in the vicinity of a kink point between a first portion (208) of an asymmetrical light/dark boundary (206) and a rising portion (210) of the light/dark boundary (206), characterized in that the glare-reduction assembly (26) has a roller-shaped glare-reduction element, which is rotatable about a rotary axis (30) located essentially horizontally and perpendicular to an optical axis (28) of the light module (10) and on the circumferential surface of which various contours are embodied as edges (40) for forming the light/dark boundary (206) of the light distribution (202), and the light-scattering and/or light-absorbing elements (44) are embodied as shaping elements in the form of a cylindrical section in cross section, and the roller-shaped glare-reduction element (26) is made from plastic as its basic material.
- The light module (10) of claim 1, characterized in that the light-scattering and/or light-absorbing elements (44) are embodied and located such that they reduce an intensity of light reflections that are caused by beams of light striking the surface (42) of the glare-reduction assembly (26) at a shallow angle.
- The light module (10) of claim 2, characterized in that the light-scattering and/or light-absorbing elements (44) are embodied and located such that they reduce an intensity of light reflections that are caused by beams of light which strike the surface (42) at an angle of 60° to 90° relative to a surface normal of the surface (42) of the glare-reduction assembly (26).
- The light module (10) of one of the foregoing claims, characterized in that the shaping elements (44) have a height 0.05 mm to 1 mm.
- The light module (10) of one of the foregoing claims, characterized in that the light-scattering and/or light-absorbing elements (44), in a region on the surface (42) of the glare-reduction assembly (26) in the vicinity of an optical axis (30), are embodied as laterally offset relative thereto.
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DE102011003814A DE102011003814A1 (en) | 2011-02-08 | 2011-02-08 | Light module of a motor vehicle headlight |
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KR102219949B1 (en) * | 2013-11-29 | 2021-02-25 | 현대모비스 주식회사 | Lamp Apparatus Of Vehicle |
CN105698063B (en) * | 2014-11-27 | 2018-04-13 | 再兴电子(深圳)有限公司 | Swinging slide projector |
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KR101776395B1 (en) | 2015-08-28 | 2017-09-08 | 현대자동차주식회사 | Head lamp module for vehicle |
EP3643962A1 (en) * | 2018-10-25 | 2020-04-29 | ZKW Group GmbH | Light unit for a motor vehicle headlamp |
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JP4695112B2 (en) | 2007-03-26 | 2011-06-08 | 株式会社小糸製作所 | Vehicle headlamp lamp unit |
JP4754518B2 (en) | 2007-03-26 | 2011-08-24 | 株式会社小糸製作所 | Vehicle headlamp lamp unit |
KR100896081B1 (en) * | 2007-11-23 | 2009-05-18 | 에스엘 주식회사 | Automotive lamp |
DE102008036192B4 (en) | 2008-08-02 | 2012-05-03 | Automotive Lighting Reutlingen Gmbh | Automotive lighting device |
JP5468855B2 (en) * | 2009-09-16 | 2014-04-09 | 株式会社小糸製作所 | Vehicle headlamp lamp unit |
JP4961005B2 (en) * | 2009-11-05 | 2012-06-27 | スタンレー電気株式会社 | Projector type headlight |
AT509830B1 (en) * | 2010-04-22 | 2012-07-15 | Zizala Lichtsysteme Gmbh | HEADLIGHTS FOR VEHICLES |
DE102010025557A1 (en) | 2010-06-29 | 2011-12-29 | Automotive Lighting Reutlingen Gmbh | Light module for a headlight of a motor vehicle |
DE102010033903A1 (en) | 2010-08-10 | 2012-02-16 | Automotive Lighting Reutlingen Gmbh | Projection module for motor vehicle headlamp, comprises light source for emitting light, primary optics for bundling portion of emitted light, and secondary optics for imaging portion of light focused on road |
-
2011
- 2011-02-08 DE DE102011003814A patent/DE102011003814A1/en not_active Ceased
-
2012
- 2012-01-10 EP EP12150542.4A patent/EP2484958B1/en active Active
- 2012-02-02 JP JP2012020546A patent/JP2012164656A/en active Pending
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DE19704467A1 (en) * | 1997-02-06 | 1998-08-13 | Bosch Gmbh Robert | Automobile headlamp with complementary reflector |
Also Published As
Publication number | Publication date |
---|---|
DE102011003814A1 (en) | 2012-08-09 |
EP2484958A2 (en) | 2012-08-08 |
JP2012164656A (en) | 2012-08-30 |
EP2484958A3 (en) | 2013-04-24 |
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