EP3657066A1 - Unité d'éclairage pour un phare de véhicule automobile destinée à générer une répartition lumineuse à limite clair/obscur - Google Patents

Unité d'éclairage pour un phare de véhicule automobile destinée à générer une répartition lumineuse à limite clair/obscur Download PDF

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Publication number
EP3657066A1
EP3657066A1 EP18207781.8A EP18207781A EP3657066A1 EP 3657066 A1 EP3657066 A1 EP 3657066A1 EP 18207781 A EP18207781 A EP 18207781A EP 3657066 A1 EP3657066 A1 EP 3657066A1
Authority
EP
European Patent Office
Prior art keywords
reflector
diaphragm
section
sub
focal point
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.)
Granted
Application number
EP18207781.8A
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German (de)
English (en)
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EP3657066B1 (fr
Inventor
Stephan Arlinghaus
Helmut Erdl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZKW Group GmbH
Bayerische Motoren Werke AG
Original Assignee
ZKW Group GmbH
Bayerische Motoren Werke AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ZKW Group GmbH, Bayerische Motoren Werke AG filed Critical ZKW Group GmbH
Priority to EP18207781.8A priority Critical patent/EP3657066B1/fr
Priority to PCT/EP2019/082053 priority patent/WO2020104576A1/fr
Priority to JP2021529066A priority patent/JP7220287B2/ja
Priority to CN201980076985.7A priority patent/CN112997034B/zh
Priority to US17/295,506 priority patent/US11421842B2/en
Priority to KR1020217019083A priority patent/KR102578466B1/ko
Publication of EP3657066A1 publication Critical patent/EP3657066A1/fr
Application granted granted Critical
Publication of EP3657066B1 publication Critical patent/EP3657066B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/322—Optical layout thereof the reflector using total internal reflection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
    • F21S41/336—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors with discontinuity at the junction between adjacent areas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/36—Combinations of two or more separate reflectors
    • F21S41/365—Combinations of two or more separate reflectors successively reflecting the light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • 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
    • F21W2102/165—Arrangement or contour of the emitted light for high-beam region or low-beam region the borderlines between emitted regions and dark regions other than cut-off lines being variable
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • a motor vehicle headlight with at least one lighting unit according to the invention is specified within the scope of the invention.
  • Numerous embodiments of lighting units for a motor vehicle headlight for generating a light distribution with a cut-off are known from the prior art.
  • the creation of a defined cut-off line in the light image of a motor vehicle headlight is either required by law - for example, a low beam with a horizontal cut-off line is mentioned - or such a cut-off line is used by vehicle manufacturers as a defined additional light function for the corresponding one Motor vehicle headlights desired.
  • the light functions of glare-free high beam or adaptive driving beam (English: adaptive driving beam) may be mentioned, which can usually be ordered as special equipment when buying a new car. Light-dark borders in vertical, horizontal or in combination are required.
  • light-dark limits are realized for lighting units for motor vehicle headlights either by directly mapping sufficiently large gradients of the illuminance of the light source or - if the light source used does not have such gradients - artificially generated by introducing appropriate diaphragms into the beam path of the lighting unit.
  • the correspondingly produced intermediate light images then have areas which are trimmed or darkened by one or more apertures and which are imaged with the aid of lenses or reflectors as apron light distribution in the apron of the motor vehicle headlight.
  • the use of such diaphragms for generating light-dark limits always leads to undesired losses in the luminous flux of the lighting unit or the motor vehicle headlight and thus to an overall reduced efficiency of the lighting system, the efficiency being the quotient of the luminous flux used and the luminous flux to be emitted ( each specified in lumens [lm]) is determined.
  • a corresponding cut-off line can be created by inserting a diaphragm into the beam path. Since the desired light patterns are often restricted to small angular ranges or high illuminance levels are required, focusing in the area of the beam diaphragm must take place with wide emission cones of the emitter - as can be the case, for example, when using LED light sources or laser light sources.
  • Such an optical arrangement therefore requires in any case a light source as an emitter, a first reflector that concentrates the light from the light source or the emitter on a focal point, an aperture that shades part of the light, and a second reflector that in the Focal plane of the focal point images generated intermediate light image.
  • the entire intermediate light image in the focal plane is shaped by the diaphragm or trimmed by the diaphragm. Since the desired light image generated by the motor vehicle headlight usually does not only have a light-dark boundary, but also has to meet defined requirements, for example with regard to its light image width in the apron, it is usually not sufficient for homogeneously radiating light sources or emitters to image the intermediate image directly, but rather it has to go through a second reflector be broadened accordingly.
  • the second reflector can be divided or faceted into several facets, each of the facets representing the part of the Intermediate photo shifts somewhat in the horizontal direction.
  • the sum of the individual facet images then results in the entire light image of the motor vehicle headlight.
  • a disadvantage of such an arrangement is that the diaphragm for generating the light-dark boundary is effective in each of the facet images, and not only in an outer or in the outermost of the facet images, where the use of the diaphragm for generating the light Dark border is actually needed.
  • the luminous flux of the motor vehicle headlight is disadvantageously reduced, which also reduces its overall efficiency.
  • the object of the present invention is therefore to avoid the disadvantages known from the prior art for lighting units of the type mentioned at the outset, to reduce the losses in the luminous flux of the lighting unit due to the aperture and to increase the efficiency of the lighting unit.
  • the emerging beam is split at least into two separate beams.
  • the at least one diaphragm in the beam path, it is possible to assign the diaphragm to a specific, first reflector section of the first reflector, in which the generation of a partially cropped or partially shaded intermediate light image with the formation of a light-dark boundary is necessary and desired. This is achieved by a corresponding arrangement of the diaphragm at a short distance close to the first beam of rays emanating from this first reflector section.
  • said at least one diaphragm is spaced apart from the at least second reflector section and the second beam bundle emanating therefrom at a comparatively significantly greater distance than the small distance which is set between said diaphragm and the first beam bundle of the first reflector section. It is thus possible to crop only the intermediate light image generated in the first reflector section with the diaphragm to form a light-dark boundary, but not the intermediate light image generated in the at least second reflector section, for which due to the comparatively greater distance between the outgoing second beam and the diaphragm whose diaphragm edge is not suitable for forming a light-dark boundary.
  • the intermediate image generated at least in the second reflector section thus remains essentially free from influence by shading the diaphragm arrangement.
  • the invention also includes versions of a lighting unit in which the first reflector is divided, for example, into three or more reflector sections, and versions in which one or more shutters are assigned to individual reflector sections.
  • the losses in the luminous flux of the lighting unit due to the aperture are advantageously minimized and the overall efficiency of the lighting unit is increased if at least one of the three or more reflector sections is essentially free from influence by shading of the aperture arrangement.
  • the at least two or more separate reflector sections of the first reflector can, for example, be made in one piece, a transition region, for example in the form of a curve or a line, being formed between adjacent reflector sections.
  • individual or all reflector sections of the first reflector can also consist of one or more individual ones Components exist and the first reflector can thus be made in several pieces from several assembled components.
  • an intermediate light image generated in the diaphragm plane is then categorized as “essentially free from the influence of shading the diaphragm arrangement” if the luminous flux of the relevant intermediate light image is not or only slightly reduced by introducing the diaphragm into the beam path, and thus with such a diaphragm arrangement no functional cut-off is achieved.
  • first, second or third reflector section of the first reflector or of a first, second or third reflector segment of the second reflector are merely intended for better understanding or for easier readability.
  • the individual reflector sections or reflector segments in question are neither ranked in terms of an evaluation, nor are they fixed in terms of their position, position or orientation to one another.
  • a first diaphragm can be assigned to the first reflector section and a second diaphragm can be assigned to the third reflector section of the first reflector, and the diaphragms in each case close to that of the first reflector section or be arranged from the third reflector section, the intermediate light images generated in the first and in the third reflector section are each trimmed to form corresponding light-dark boundaries.
  • the second and the fourth reflector section are each free from the influence of shading through the diaphragm arrangements.
  • the plurality of reflector sections can be positioned, for example, in terms of their installation positions next to one another in the form of a line essentially in the horizontal direction, one below the other in the form of a column essentially in the vertical direction, or else in any matrix arrangement.
  • the first reflector can be constructed in several parts and have several reflector sections with at least one focal point, and the at least one light source can each be arranged in the at least one focal point, the at least one diaphragm being arranged such that it is exclusively assigned to the first reflector section of the first reflector and arranged at a short distance close to the beam emerging from the first reflector section and trimming the intermediate light image generated in the first reflector section to form a light-dark boundary, and the at least one aperture at a greater distance far from that of the second and if necessary spaced apart from the further reflector sections of the first reflector is arranged and the intermediate light images generated in the second and possibly the further reflector sections are essentially free from the influence of shading of the diaphragm arrangement.
  • the losses due to the aperture in the luminous flux of the lighting unit can be further minimized by a suitable arrangement of the at least one aperture, and the efficiency of the lighting unit can advantageously be increased further.
  • the second reflector can be divided into two or more reflector segments, a first reflector segment of the second reflector being associated with the intermediate light image generated in the first reflector section of the first reflector.
  • the transitions between the reflector sections of the first reflector fall on transitions between the reflector segments of the second reflector, or the transitions between the reflector sections and the reflector segments are also assigned to one another.
  • the proportion of unwanted scattered light can therefore advantageously be reduced.
  • the second reflector in a lighting unit can be divided into two or more reflector segments in the manner of facets, with exactly the first reflector segment of the second reflector being associated with the intermediate light image generated in the first reflector section of the first reflector.
  • the facet image of the first reflector segment of the second reflector is advantageously trimmed; the other reflector segments each provide a complete image of the light source used.
  • the division of the first reflector is matched to the faceting of the second reflector in such a way that the light focused on the first reflector section strikes only the first reflector segment.
  • This embodiment also has the advantage that the proportion of undesired scattered light can be reduced.
  • a lighting unit can advantageously be constructed such that the at least one diaphragm is attached directly to or at least close to the first reflector section of the first reflector.
  • the at least one diaphragm is attached directly to or at least close to the first reflector segment of the second reflector.
  • This compact design according to which the diaphragm is connected to the second reflector or at least fastened close to the first reflector segment of the second reflector, can advantageously reduce the tolerances of the diaphragm.
  • a diaphragm plane of the at least one diaphragm can correspond to a focal plane of the at least one focal point of the first reflector segment of the second reflector.
  • the at least one diaphragm such that a diaphragm plane of the at least one diaphragm and a focal plane of the at least one focal point of the first reflector segment of the second reflector intersect only in one line through this focal point or focal point.
  • a sharp light-dark boundary can only be deliberately reached in the vicinity of the focal point or focal point, an aperture edge far from the focal point being imaged out of focus - that is, with a smaller gradient of the light-dark transition.
  • Even such designs with only partially or partially sharp light-dark lines can be cheap and desirable for applications in the automotive industry.
  • At least the first reflector section of the first reflector can be an ellipsoid reflector, which ellipsoid reflector has a second focal point, the at least one diaphragm being arranged such that it is at a short distance from the second focal point of the first reflector section is spaced.
  • point-shaped light sources can advantageously be represented as points.
  • design of a reflector the surface of which is an ellipsoid of revolution, also offers manufacturing advantages. From a lighting point of view, the use of such an ellipsoid reflector can possibly avoid undesirable distortions in the imaging of the light source in the focal plane.
  • the two or more reflector sections of the first reflector can expediently each be ellipsoidal reflectors, the ellipsoidal reflectors each having a second focal point and the at least one diaphragm being arranged such that it is at a short distance near the second focal point of the first reflector section is arranged and the diaphragm is arranged at a greater distance far from the second focal points of all further reflector sections of the first reflector.
  • the small distance from the beam and / or from the second focal point of the first reflector section of the first reflector to a diaphragm edge of the diaphragm can be defined as being close to the diaphragm if the distance is less than 1.7 times the value of one Reference length, preferably less than 1.5 times the value of a reference length, particularly preferably less than 1.3 times the value of a reference length, and the intermediate light image generated in the first reflector section is trimmed to form a light-dark boundary, wherein the reference length is selected as the smallest distance from the distances of the maximum of the illuminance of all reflector sections of the first reflector from the diaphragm edge of the diaphragm.
  • the distance of the ray bundle from the diaphragm, which ray bundle emanates from the first reflector section of the first reflector, for which the diaphragm is effective, is thus defined as being close to the diaphragm or near the diaphragm edge if and only if the distance is smaller than the 1.7- times the value, preferably less than 1.5 times the value, particularly preferably less than 1.3 times the value, which is the previously defined reference length, provided that the intermediate light image generated in the first reflector section also forms a Patoscuro -Border is trimmed.
  • the maximum illuminance E MAX can be measured, for example, by a luminance camera, which takes an image of the intermediate light image in the diaphragm plane, which is made visible, for example, by inserting a matt plane into the diaphragm plane.
  • a luminance camera which takes an image of the intermediate light image in the diaphragm plane, which is made visible, for example, by inserting a matt plane into the diaphragm plane.
  • Another possibility for measuring the maximum of the illuminance E MAX is to insert a mirror or another optic into the beam path or into the diaphragm plane in order to measure the intermediate light image with a luminance camera or another sensor system.
  • the distance from the second focal point of the first reflector section of the first reflector to the diaphragm or to the diaphragm edge is expediently used for the same categorization.
  • a calculation scheme is thus advantageously specified in order to determine the conditions which a diaphragm arrangement must satisfy in order to be selectively assigned to a first reflector section of the first reflector and to be suitable for forming a light-dark boundary of the corresponding intermediate light image.
  • the distance of a beam and / or a second focal point of the corresponding reflector section of the first reflector is far from the diaphragm or from the diaphragm edge thereof, and the diaphragm arrangement is essentially free from the effects of shadows on that generated in this reflector section Intermediate photo.
  • the greater distance from the beam and / or from the second focal point of the second reflector section and possibly the further reflector sections of the first reflector to a diaphragm edge of the diaphragm is then defined as being far from the diaphragm, if by If the aperture is introduced into the beam path, the luminous flux of the intermediate light image generated in the second and optionally the further reflector sections is reduced by at most 10%, preferably by at most 7%, particularly preferably by at most 5%.
  • an intermediate light image is essentially free from the influence of shading the aperture arrangement if the shape of the intermediate light image generated does not change, or changes only insignificantly, as soon as the corresponding aperture is completely removed from the beam path. This is the case when the reduction in luminous flux caused by the aperture meets the values given above of at most 10%, preferably at most 7%, particularly preferably at most 5%. Minor interferences, according to which, for example, small peripheral areas of the intermediate light image generated can be shaded under certain circumstances, but without being perceived as a functional light-dark boundary, therefore do not by definition represent any significant shadowing or impairment of the corresponding intermediate light image.
  • the at least one diaphragm in a lighting unit can have a first diaphragm edge for producing a first light-dark boundary and a second diaphragm edge for producing a second light-dark boundary and / or in the beam path between the at least one first Reflector and the at least second reflector can be arranged adjustable.
  • the at least one screen is essentially L-shaped, with each of the two legs of this L-shaped screen acting in each case as a screen edge, with which each has its own light.
  • Dark border can be generated, for example a horizontal and a vertical light-dark border.
  • assign the first diaphragm edge of the diaphragm to a first reflector section of the first reflector and the second diaphragm edge of the diaphragm to a further second reflector section of the first reflector by means of a suitable diaphragm arrangement.
  • the third reflector section can be so far away from the two diaphragm edges that the intermediate light image generated in this reflector section is again free from influence by shading the diaphragm arrangement.
  • the luminous flux yield is increased in a favorable manner.
  • a lighting unit with at least one diaphragm, which is essentially V-shaped or in which three diaphragm edges are arranged in a triangular shape and the diaphragm edges form the sides of the triangular diaphragm recess.
  • two diaphragm edges can be optically active and the third diaphragm edge can be arranged such that it is optically inactive.
  • the at least one light source can be an LED light source in a lighting unit according to the invention.
  • the at least one light source can be a laser light source in a lighting unit according to the invention.
  • a motor vehicle headlight with at least one lighting unit according to the invention can also be specified within the scope of the invention.
  • Fig. 1 schematically represents a lighting unit according to the prior art, which has a first reflector R 1 and a second reflector R 2 , with a diaphragm in a beam path S of the light symbolized by an arrow between the first reflector R 1 and the second reflector R 2 B is provided.
  • the second reflector R 2 is here divided into four reflector segments R 21 , R 22 , R 23 and R 24 arranged horizontally next to one another are each assigned to the aperture B.
  • the first reflector R 1 is designed here, for example, as an ellipsoid reflector and has a first focal point F 1R1 and a second focal point F 2R1 .
  • a light source 2 for example an LED light source.
  • the second focal point F 2R1 of the first reflector R 1 is at a small distance D 1 from a diaphragm edge BK 1 of the diaphragm B.
  • the aperture B is arranged such that the second focal point F 2R1 of the first reflector R 1 lies in the aperture plane BE.
  • the second reflector R 2 used here is, for example, a free-form reflector, each of the reflector segments R 21 , R 22 , R 23 and R 24 each having a focal point F 1R2 .
  • These focal points F 1R2 of the second reflector R 2 are also arranged in the diaphragm plane BE.
  • the beam S 1 emerging from the light source 2 and deflected by the reflector R 1 emerges from the first reflector R 1 at the same small distance D 1 close to the diaphragm edge BK 1 of the diaphragm B.
  • a disadvantage of this embodiment known from the prior art is at least that the aperture B of each of the intermediate light images of all four reflector segments R 21 , R 22 , R 23 and R 24 is trimmed to form light-dark boundaries.
  • the overall efficiency of this previously known lighting unit - expressed as the quotient of the luminous flux used and the luminous flux emerging (in each case specified in lumens [lm]) - is disadvantageously reduced.
  • the illustrations 2a to 2d show the respective intermediate light images of the individual reflector segments R 21 , R 22 , R 23 and R 24 of the in Fig. 1 outlined second reflector R 2 . Due to the different geometries, each of the reflector segments R 21 , R 22 , R 23 and R 24 generates different intermediate light images, each with different distortions of the intermediate light image, the light-dark boundary generated by the diaphragm B being both deformed and rotated in its position. The individual facets or reflector segments R 21 , R 22 , R 23 and R 24 shift the intermediate light image generated by them in different ways in the horizontal direction.
  • the cut-off line of the overall light image which in Fig. 2e is illustrated as the sum of those in the 2a to 2d Intermediate light images shown, is - apart from slight stray light, which here in the Fig. 2d Intermediate light image shown of the fourth reflector segment R 24 occurs - essentially by the light-dark boundary of the in Fig. 2a Intermediate light image shown of the reflector segment R 21 generated.
  • a light image generated in this way is therefore inefficient since the light-dark boundary is actually only required in one of the four intermediate light images, namely here in the intermediate light image obtained in the first reflector segment R 21 , but the light-dark limit in all intermediate light images of the four Reflector segments R 21 , R 22 , R 23 and R 24 is generated.
  • a luminous flux of 100 lumens [lm] and one used here assumed reflectivity of 0.95 or 95% of the reflectors used an outgoing luminous flux of only 53 lumens [lm] is thus obtained.
  • Fig. 3a shows an illumination unit 1 according to the invention with a two-part first reflector R 1 with a first reflector section R 11 and a second reflector section R 12
  • Fig. 3a the beam path S of the first reflector section R 11 of the first reflector R 1 is illustrated.
  • This first reflector section R 11 is arranged near the diaphragm B and is assigned to it.
  • the aperture B is provided in the beam path S between the first reflector R 1 and the second reflector R 2 .
  • the second reflector R 2 is here, for example, divided into four reflector segments R 21 , R 22 , R 23 and R 24 arranged approximately horizontally next to one another, only the first reflector segment R 21 being assigned to the diaphragm B.
  • the two reflector sections R 11 and R 12 of the first reflector R 1 are each designed here as ellipsoid reflectors and each have a first focal point F 1R11 or F 1R12 and a second focal point F 2R11 or F 2R12 .
  • a light source 2 for example an LED light source.
  • FIG. 3b shows for those in Fig. 3a
  • Illumination unit 1 shows the beam path S in the second reflector section R 12 of the first reflector R 1 .
  • the second focal point F is 2R11 of the first reflector portion R 11 from a diaphragm edge BK 1 of the diaphragm B spaced a slight distance D 1 wherein the light emerging from the light source 2 and from the first reflector portion R 11 deflected beam S 11 in this small distance D 1 close to the aperture edge BK 1 of the aperture B emerges from the first reflector R 1 .
  • the aperture B trims the intermediate light image generated in the first reflector section R 11 , forming a light-dark boundary. This cropped intermediate light image is in Fig. 4a illustrated.
  • the second focal point F 2R12 of the second reflector section R 12 of the first reflector R 1 is illustrated at a greater distance D 2 distant from a diaphragm edge BK 1 of the diaphragm B.
  • the smaller distance D 1 of the second focal point F 2R11 of the first reflector section R 11 from the diaphragm edge BK 1 is in any case smaller than the larger distance D 2 of the second focal point F 2R12 of the second reflector section R 12 from the diaphragm edge BK 1 .
  • the diaphragm B is arranged such that the second focal point F 2R11 of the first reflector section R 11 and the second focal point F 2R12 of the second reflector section R 12 each lie in the diaphragm plane BE of the diaphragm B.
  • the second reflector R 2 used here is, for example, a free-form reflector, each of the four reflector segments R 21 , R 22 , R 23 and R 24 each having a focal point F 1R21 , F 1R22 , F 1R23 and F 1R24 .
  • These focal points F 1R21 , F 1R22 , F 1R23 and F 1R24 of the four reflector segments R 21 , R 22 , R 23 and R 24 of the second reflector R 2 are also arranged in the diaphragm plane BE.
  • the first reflector segment R 21 of the second reflector R 2 is assigned to the intermediate light image generated in the first reflector section R 11 of the first reflector R 1 , this intermediate light image being shown in FIG Fig. 4a is shown.
  • the further reflector segments R 22 , R 23 and R 24 of the second reflector R 2 are assigned to the second reflector section R 12 of the first reflector R 1 .
  • the corresponding intermediate light images of the second, third and fourth reflector segments R 22 , R 23 and R 24 are shown in the figures 4b to 4d shown. Since the diaphragm B away at a greater distance D 2 each emanating from the second reflector portion R 12 beam S is disposed at a distance 12, the intermediate light images of the second, third and fourth reflector segment R 22, R 23 R 24 substantially free of or influence by shading the aperture arrangement.
  • Fig. 4e shows the total photograph as the sum of the in the 4a to 4d shown intermediate light images. Since the diaphragm B only acts on the intermediate light image which is obtained from the pairing of the first reflector section R 11 of the first reflector R 1 and the associated first reflector segment R 21 of the second reflector R 2 , the light-dark boundary of the overall light image becomes generated only in the first reflector segment R 21 of the second reflector R 2 .
  • the further intermediate light images which are obtained from the second, third and fourth reflector segments R 22 , R 23 and R 24 , are advantageously not shaded or trimmed, since there the distance D 2 of the diaphragm B from the second focal point F 2R12 of the second reflector section R 12 of the first reflector R 1 is further away compared to the small distance D 1 and therefore the intermediate light images of the reflector segments R 22 , R 23 and R 24 are essentially free from shading influences.
  • the two pictures 5a and 5b each relate to an alternative embodiment of the invention and each show an illumination unit 1 with a multi-part first reflector R 1 , which is designed here as a two-part free-form reflector.
  • the reflector R 1 has a first reflector section R 11 with a focal point F 1R11 , the diaphragm B being arranged at a distance D 1 near the beam S 11 emanating from the first reflector section R 11 .
  • the aperture B trims the intermediate light image generated in the first reflector section R 11 to form a light-dark boundary.
  • the second reflector R 2 is segmented here, for example, into four reflector segments R 21 , R 22 , R 23 and R 24 arranged side by side.
  • the aperture B is here directly attached to the second reflector R 2 on its first reflector segment R 21 and is only assigned to the first reflector section R 11 of the first free-form reflector. Furthermore, only the first reflector segment R 21 of the second reflector R 2 is associated with the intermediate light image generated in the first reflector section R 11 of the first reflector R 1 . This is in Fig. 5a shown.
  • Fig. 5b shows the further, second reflector section R 12 of the first free-form reflector of the in Fig. 5a shown lighting unit according to the invention, here in Fig. 5b the beam path S of the second reflector section R 12 is illustrated, which is free from the influence of shading through the diaphragm B.
  • the second, third and fourth reflector segments R 22 , R 23 and R 24 of the second reflector R 2 are assigned to the intermediate light image generated in the second reflector section R 12 of the first reflector R 1 .
  • these intermediate light images are not cropped or shaded due to the lack of an aperture there.
  • Fig. 6 shows a detailed view of a lighting unit 1 according to the invention.
  • the lighting unit 1 comprises, in the image shown above, a light source 2 which is positioned behind or below the first reflector R 1 .
  • the reflector R 1 is constructed here in one piece and is designed with two reflector sections R 11 and R 12 .
  • a dashed arrow indicates a first beam S 11 of the emerging light of the first reflector section R 11 and a second beam S 12 of the emerging light of the second reflector section R 12 .
  • the aperture B between the first reflector R 1 and the second reflector R 2 here has a triangular aperture with three aperture edges BK 1 , BK 2 and BK 3 , the aperture edges forming the three sides of the triangular aperture.
  • the diaphragm B is positioned such that a first diaphragm edge BK 1 of the diaphragm B is not optically active here and is arranged somewhat distant from the first beam S 11 and from the second beam S 12 .
  • a second diaphragm edge BK 2 and a third diaphragm edge BK 3 of the diaphragm B are optically active here.
  • the first bundle of rays S 11 is focused here near the optically active aperture edge BK 3 .
  • the second beam S 12 is focused near the optically active diaphragm edge BK 2 .
  • the intermediate light image generated in the first reflector section R 11 remains essentially free from influence by shading the diaphragm edge BK 2 .
  • the intermediate light image generated in the second reflector section R 12 remains essentially free from influence by shading the diaphragm edge BK 3 .
  • the second reflector R 2 is segmented here, for example, into a plurality of reflector segments, three reflector segments R 21 , R 22 and R 23 arranged next to one another being considered in more detail for the following description. Only the first reflector segment R 21 of the second reflector R 2 is assigned to the intermediate light image generated in the first reflector section R 11 of the first reflector R 1 . The intermediate light images generated in the second and third reflector segments R 22 , R 23 are advantageously not trimmed, as a result of which the overall efficiency of the lighting unit 1 shown is increased overall.
  • the diaphragm B shown here has a further, second diaphragm edge BK 2 , which, in analogy to the previous description, can in turn be used to selectively shade the intermediate light image of a further reflector segment of the second reflector R 2 .
  • Fig. 7 shows a detailed view of a motor vehicle headlight 10 with the in Fig. 6 illustrated lighting unit 1 according to the invention.
  • the lighting unit 1 is already in the installed position within the motor vehicle headlight 1 and is installed with the corresponding housing components of the headlight.
  • a lens that serves only to protect the motor vehicle headlight 1 and that has no optical function is shown here in the view from Fig. 7 removed for clarity and not shown.
  • the luminous flux loss in the left half of the picture Fig. 8 The aperture arrangement shown here is over 15%.
  • Fig. 9 shows a schematic representation of several intermediate light images spaced differently from an aperture B or from its aperture edge BK 1 .
  • the maximum illuminance of each individual intermediate light image has a certain minimum distance from the diaphragm or from the diaphragm edge, the shortest of these distances being defined as the reference length L.
  • an intermediate light image is close to the edge of the diaphragm if the smallest distance between the maximum of the illuminance of the intermediate light image and the edge of the diaphragm exceeds a specified value.
  • Fig. 9 An example is in Fig. 9 the limit value is 1.5 times the value of the reference length L as a dashed line.
  • the two middle intermediate light images shown are therefore positioned by definition far from the edge of the diaphragm, since their distances D 1 and D 2 are larger than the limit value of 1.5 times the reference length L specified here.
  • the outer left intermediate light image is by definition close to the edge of the diaphragm, since it is in a distance according to the reference length L from the diaphragm edge of the diaphragm B. It is also in Fig. 9 shown outer right intermediate light image at only a small distance D 3 from the aperture B and is thus close to the edge of the aperture.
  • Fig. 10 shows a schematic representation of an intermediate light image, which is essentially free of influence by shading through the diaphragm arrangement of the diaphragm B is.
  • the shaded area and labeled with 93% is limited by the isoline within which 93% of the luminous flux of the intermediate light image is located.
  • the non-hatched outer area of the intermediate light image thus represents that edge area of the light image through which 7% of the luminous flux flows.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP18207781.8A 2018-11-22 2018-11-22 Unité d'éclairage pour un phare de véhicule automobile destinée à générer une répartition lumineuse à coupure Active EP3657066B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP18207781.8A EP3657066B1 (fr) 2018-11-22 2018-11-22 Unité d'éclairage pour un phare de véhicule automobile destinée à générer une répartition lumineuse à coupure
PCT/EP2019/082053 WO2020104576A1 (fr) 2018-11-22 2019-11-21 Unité d'éclairage destinée à un phare de véhicule automobile pour générer une distribution de lumière à coupure clair-obscur
JP2021529066A JP7220287B2 (ja) 2018-11-22 2019-11-21 明暗境界を有する配光を生成するための自動車投光器用の照射ユニット
CN201980076985.7A CN112997034B (zh) 2018-11-22 2019-11-21 用于产生具有明暗边界的光分布的机动车大灯用的照明单元
US17/295,506 US11421842B2 (en) 2018-11-22 2019-11-21 Lighting unit for a motor vehicle headlight for generating a light distribution having a light-dark boundary
KR1020217019083A KR102578466B1 (ko) 2018-11-22 2019-11-21 명암 경계를 갖는 광 분포를 생성하기 위한 자동차 헤드램프용 조명 유닛

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18207781.8A EP3657066B1 (fr) 2018-11-22 2018-11-22 Unité d'éclairage pour un phare de véhicule automobile destinée à générer une répartition lumineuse à coupure

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EP3657066A1 true EP3657066A1 (fr) 2020-05-27
EP3657066B1 EP3657066B1 (fr) 2020-12-30

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US (1) US11421842B2 (fr)
EP (1) EP3657066B1 (fr)
JP (1) JP7220287B2 (fr)
KR (1) KR102578466B1 (fr)
CN (1) CN112997034B (fr)
WO (1) WO2020104576A1 (fr)

Cited By (1)

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EP4206524A4 (fr) * 2021-09-18 2024-01-03 Hasco Vision Tech Co Ltd Système de réflexion optique pour dispositif d'éclairage de lampe de véhicule, et dispositif d'éclairage de lampe de véhicule

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* Cited by examiner, † Cited by third party
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CN117515468B (zh) * 2024-01-02 2024-04-12 华域视觉科技(上海)有限公司 照明模组、照明系统及车辆

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JP2000348508A (ja) * 1999-06-04 2000-12-15 Stanley Electric Co Ltd 車両用灯具
JP2002313112A (ja) * 2001-04-13 2002-10-25 Stanley Electric Co Ltd ヘッドランプ
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JP4145526B2 (ja) * 2001-12-26 2008-09-03 株式会社小糸製作所 自動車用前照灯
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JP4536479B2 (ja) * 2003-12-02 2010-09-01 株式会社小糸製作所 車両用前照灯
JP2006024395A (ja) * 2004-07-06 2006-01-26 Ichikoh Ind Ltd 車両用灯具
JP5529708B2 (ja) * 2010-10-29 2014-06-25 株式会社小糸製作所 車両用照明灯具
JP5831788B2 (ja) * 2011-07-01 2015-12-09 スタンレー電気株式会社 車両用灯具ユニット
FR2982929B1 (fr) * 2011-11-22 2014-01-17 Valeo Vision Dispositif d'emission de lumiere pour projecteur de vehicule automobile
JP6154169B2 (ja) * 2013-03-29 2017-06-28 株式会社小糸製作所 車両用前照灯
DE102014226646A1 (de) * 2014-12-19 2016-06-23 Osram Gmbh Beleuchtungseinrichtung
CN206159984U (zh) * 2016-09-14 2017-05-10 苏永道 投射式近光前照灯二倍出光率配光的车灯
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JPH01220301A (ja) * 1988-02-26 1989-09-04 Koito Mfg Co Ltd 車輌用前照灯
JP2000348508A (ja) * 1999-06-04 2000-12-15 Stanley Electric Co Ltd 車両用灯具
JP2002313112A (ja) * 2001-04-13 2002-10-25 Stanley Electric Co Ltd ヘッドランプ
JP4145526B2 (ja) * 2001-12-26 2008-09-03 株式会社小糸製作所 自動車用前照灯
JP2007080637A (ja) * 2005-09-13 2007-03-29 Koito Mfg Co Ltd 車両用灯具
US20090284981A1 (en) * 2008-05-14 2009-11-19 Ichikoh Industries, Ltd. Vehicle lighting device

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Publication number Priority date Publication date Assignee Title
EP4206524A4 (fr) * 2021-09-18 2024-01-03 Hasco Vision Tech Co Ltd Système de réflexion optique pour dispositif d'éclairage de lampe de véhicule, et dispositif d'éclairage de lampe de véhicule

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WO2020104576A1 (fr) 2020-05-28
US11421842B2 (en) 2022-08-23
EP3657066B1 (fr) 2020-12-30
CN112997034A (zh) 2021-06-18
US20220010938A1 (en) 2022-01-13
KR20210116445A (ko) 2021-09-27
JP2022513120A (ja) 2022-02-07
CN112997034B (zh) 2024-01-30
KR102578466B1 (ko) 2023-09-14
JP7220287B2 (ja) 2023-02-09

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