EP3974709A1 - Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer - Google Patents

Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer Download PDF

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Publication number
EP3974709A1
EP3974709A1 EP20198338.4A EP20198338A EP3974709A1 EP 3974709 A1 EP3974709 A1 EP 3974709A1 EP 20198338 A EP20198338 A EP 20198338A EP 3974709 A1 EP3974709 A1 EP 3974709A1
Authority
EP
European Patent Office
Prior art keywords
light
lighting device
free
distance
projection lens
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20198338.4A
Other languages
German (de)
English (en)
French (fr)
Inventor
Siegmar Hackl
Jakob Pühringer
Markus Danner
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
Original Assignee
ZKW Group GmbH
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 filed Critical ZKW Group GmbH
Priority to EP20198338.4A priority Critical patent/EP3974709A1/de
Priority to JP2023517365A priority patent/JP7520219B2/ja
Priority to PCT/EP2021/070886 priority patent/WO2022063461A1/de
Priority to EP21746766.1A priority patent/EP4217647B1/de
Priority to KR1020237004427A priority patent/KR20230036130A/ko
Priority to CN202180065687.5A priority patent/CN116194709A/zh
Publication of EP3974709A1 publication Critical patent/EP3974709A1/de
Withdrawn legal-status Critical Current

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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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/275—Lens surfaces, e.g. coatings or surface structures
    • 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/285—Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805
    • 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
    • F21W2102/17—Arrangement or contour of the emitted light for regions other than high beam or low beam
    • F21W2102/18—Arrangement or contour of the emitted light for regions other than high beam or low beam for overhead signs

Definitions

  • the invention also relates to a motor vehicle headlight with at least one lighting device according to the invention.
  • This area of light distribution above the cut-off line is also referred to as the overhead or signlight area (derived from the visibility of the traffic signs).
  • the statutory measuring points in this area extend up to 4° above the horizon and are characterized by minimum and maximum values as well as so-called cumulative values for the illuminance that occurs at the measuring points.
  • the optical device is generally a modification of the "original" lens entry or light exit surface of the projection lens, with the most varied of modifications being generally possible for deflecting light into a region above the cut-off line.
  • a fundamental problem that occurs with all known solutions with such optical devices is that the deflected beams are concentrated in a relatively small area, so that on the one hand too much light gets into this area and on the other hand other areas have too low light values, ie that this area is not homogeneously illuminated by the known solutions.
  • the projection lens comprises an optical device arranged on the projection lens, which comprises a multiplicity of free-form lenses, each with an effective surface, the optical device being set up to capture part of the light entering the projection lens and exiting via the effective surfaces of the free-form lenses Directing light to an area above the asymmetrical light-dark boundary of the low beam distribution.
  • the targeted selection of the active surfaces and their course on the projection lens enables the widest possible and most homogeneously illuminated signlight in the low beam distribution.
  • the optical device is arranged on the light exit surface of the projection lens and forms a manipulated part of the light exit surface that deviates from the convex light exit surface.
  • each free-form lens and the light exit surface form a starting edge in a common surface intersection line, with the effective surface extending away from the starting edge of the light exit surface along two side edges to a sloped edge opposite the starting edge, preferably in the direction the main emission direction, which sloped edge has a first end and a second end, the first end being at a first distance from the light exit surface along a surface normal in an orthogonal projection onto the light exit surface, and the second end having a second distance along a surface normal in an orthogonal projection onto the light exit surface Has distance to the light exit surface.
  • the optical device is arranged on the light entry surface of the projection lens and forms a manipulated part of the light entry surface that deviates from the light entry surface.
  • first and the second distance of an effective surface is of the same size, wherein preferably the first and the second distance of each effective surface is of the same size.
  • This object is also achieved by a motor vehicle headlight with at least one lighting device according to the invention.
  • the lighting device 10 comprises a beam stop 20 with an optically relevant stop edge for generating an asymmetrical light-dark boundary, the light module 11 being arranged in the installation position of the lighting device 10 in a motor vehicle headlight on an upper side of the beam stop 20 and in combination with the optically relevant Aperture edge of the beam diaphragm 20 contributes to the generation of a low beam distribution.
  • the lighting device also includes a projection lens 100 with an optical axis B, which projection lens 100 is set up to project the light that can be generated by the light module in front of the lighting device 10 in a main emission direction, with the projection lens 100 having a light entry surface 110 and a convex light exit surface opposite the light entry surface 110 120 has.
  • An optical device 200 is arranged on the light exit surface 120 of the projection lens 100 , wherein the optical device 200 forms a manipulated part of the light exit surface that deviates from the convex light exit surface 120 and comprises a multiplicity of free-form lenses 210 , each with an effective surface 211 , such as in FIG 2 and 3 can be seen, the optical device 200 being set up to direct part of the light entering the projection lens 100 and exiting via the active surfaces 211 of the free-form lenses to an area above the asymmetric light-dark boundary of the low-beam light distribution.
  • Figures 4A to 4C show exemplary embodiments of the free-form lenses 210, the effective surface 211 each having a free-form lens 210 and the light exit surface 120 in one common surface intersection line form a starting edge 211a , with the effective surface 211 extending from the starting edge 211a away from the light exit surface 120 along two side edges to a sloped edge 211b opposite the starting edge 211a , preferably in the direction of the main emission direction, which sloped edge 211b has a first end 212a and a second end 212b , wherein the first end 212a has a first distance A1 from the light exit surface 120 along a surface normal in an orthogonal projection onto the light exit surface 120 , and the second end 212b has a second distance along a surface normal in an orthogonal projection onto the light exit surface 120 A2 to the light exit surface 120 has.
  • the active surfaces are of curved design, preferably of different curved design.
  • the first distance A1 is greater than the second distance A2, with the second distance A2 being zero.
  • the first distance A1 is greater than the second distance A2.
  • the first distance A1 is equal to the second distance A2.
  • the free-form lenses 210 of the optical device 200 are arranged next to one another in a horizontal row when the lighting device 10 is installed in a motor vehicle headlight, with the first distance A1 of the effective surfaces 211 starting from a first free-form lens of the horizontally arranged free-form lenses extending to to a last free-form lens is initially smaller than the second distance A2, with the first distance A1 increasing in the course of the optical axis B and the second distance A2 decreasing, so that the first distance A1 of the free-form lenses in the area of the optical axis B is equal to the second distance A2 is, the first distance A1 further increasing further away from the optical axis B and the second distance A2 further decreasing, as outlined in FIG figure 5 is shown, which shows the projection lens 100 and the optical device 200 from above.
  • the optical device 200 may be arranged in another example on the light entry surface 110 of the projection lens 100 , with the free-form lenses 210 being arranged next to one another in a plurality of rows parallel to one another.
  • the effective surface 211 of a free-form lens 210 - similar to the example shown in the figures - and the light entry surface 110 form a starting edge in a common surface intersection line, with the effective surface 211 starting from the starting edge 211a extending from the light entry surface 110 along two side edges to a sloped edge 211b opposite the starting edge 211a , which sloped edge 211b has a first end and a second end, the first end being a first distance A1 from the light entrance surface 120 along a surface normal in an orthogonal projection onto the light entry surface 110 , and the second end 212b has a second distance A2 from the light exit surface 120 along a surface normal in an orthogonal projection onto the light entry surface 120 .
  • the first and the second distance A1 , A2 of an active surface 211 is the same, the first and the second distance A1 , A2 of each active surface 211 preferably being the same.
  • the free-form lenses 210 of the optical device 200 are arranged relative to one another such that a logo, for example a manufacturer's logo, is formed.
  • a logo for example a manufacturer's logo
  • Lighting device ... 10 light module
  • 11 Beam stop
  • 20 projection lens ... 100 light entry surface
  • 110 light exit surface ... 120
  • Optical setup 200 freeform lens
  • freeform lens ... 210 Effective area... 211 starting edge... 211a slope edge ... 211b First ending... 212a Second ending... 212b First distance... A1 Second distance... A2 Optical axis... B

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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)
EP20198338.4A 2020-09-25 2020-09-25 Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer Withdrawn EP3974709A1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP20198338.4A EP3974709A1 (de) 2020-09-25 2020-09-25 Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer
JP2023517365A JP7520219B2 (ja) 2020-09-25 2021-07-26 自動車投光器用の照射装置
PCT/EP2021/070886 WO2022063461A1 (de) 2020-09-25 2021-07-26 Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer
EP21746766.1A EP4217647B1 (de) 2020-09-25 2021-07-26 Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer
KR1020237004427A KR20230036130A (ko) 2020-09-25 2021-07-26 자동차 헤드라이트용 조명 장치
CN202180065687.5A CN116194709A (zh) 2020-09-25 2021-07-26 用于机动车前照灯的照明设备

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20198338.4A EP3974709A1 (de) 2020-09-25 2020-09-25 Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer

Publications (1)

Publication Number Publication Date
EP3974709A1 true EP3974709A1 (de) 2022-03-30

Family

ID=72659139

Family Applications (2)

Application Number Title Priority Date Filing Date
EP20198338.4A Withdrawn EP3974709A1 (de) 2020-09-25 2020-09-25 Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer
EP21746766.1A Active EP4217647B1 (de) 2020-09-25 2021-07-26 Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP21746766.1A Active EP4217647B1 (de) 2020-09-25 2021-07-26 Beleuchtungsvorrichtung für einen kraftfahrzeugscheinwerfer

Country Status (5)

Country Link
EP (2) EP3974709A1 (ja)
JP (1) JP7520219B2 (ja)
KR (1) KR20230036130A (ja)
CN (1) CN116194709A (ja)
WO (1) WO2022063461A1 (ja)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT8253U1 (de) * 2005-03-14 2006-04-15 Zizala Lichtsysteme Gmbh Linse für einen fahrzeugscheinwerfer
EP2578929A2 (de) * 2011-10-04 2013-04-10 Automotive Lighting Reutlingen GmbH Anordnung und Dimensionierung von Overhead-Elementen auf einer Projektionslinse eines Kraftfahrzeugscheinwerfers
DE102012107426A1 (de) * 2012-08-14 2014-02-20 Hella Kgaa Hueck & Co. Scheinwerfer für Fahrzeuge
DE102012107427A1 (de) * 2012-08-14 2014-05-22 Hella Kgaa Hueck & Co. Optische Fläche und Beleuchtungsvorrichtung für Fahrzeuge
EP2985522A1 (en) * 2013-04-02 2016-02-17 Ichikoh Industries, Ltd. Vehicle lamp
DE102014118745A1 (de) * 2014-12-16 2016-06-16 Hella Kgaa Hueck & Co. Scheinwerfer für Fahrzeuge

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3886672B2 (ja) 1999-07-12 2007-02-28 株式会社小糸製作所 車両用前照灯
DE102004011104A1 (de) 2004-03-07 2005-09-29 Docter Optics Gmbh Scheinwerferlinse für einen Kraftfahrzeugscheinwerfer
EP3091273B1 (de) 2015-05-04 2020-11-11 ZKW Group GmbH Optische struktur für signlight

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT8253U1 (de) * 2005-03-14 2006-04-15 Zizala Lichtsysteme Gmbh Linse für einen fahrzeugscheinwerfer
EP2578929A2 (de) * 2011-10-04 2013-04-10 Automotive Lighting Reutlingen GmbH Anordnung und Dimensionierung von Overhead-Elementen auf einer Projektionslinse eines Kraftfahrzeugscheinwerfers
DE102012107426A1 (de) * 2012-08-14 2014-02-20 Hella Kgaa Hueck & Co. Scheinwerfer für Fahrzeuge
DE102012107427A1 (de) * 2012-08-14 2014-05-22 Hella Kgaa Hueck & Co. Optische Fläche und Beleuchtungsvorrichtung für Fahrzeuge
EP2985522A1 (en) * 2013-04-02 2016-02-17 Ichikoh Industries, Ltd. Vehicle lamp
DE102014118745A1 (de) * 2014-12-16 2016-06-16 Hella Kgaa Hueck & Co. Scheinwerfer für Fahrzeuge

Also Published As

Publication number Publication date
CN116194709A (zh) 2023-05-30
JP7520219B2 (ja) 2024-07-22
KR20230036130A (ko) 2023-03-14
EP4217647A1 (de) 2023-08-02
WO2022063461A1 (de) 2022-03-31
JP2023542150A (ja) 2023-10-05
EP4217647B1 (de) 2024-09-04

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