EP3721133B1 - Projektionseinrichtung für einen kraftfahrzeugscheinwerfer - Google Patents

Projektionseinrichtung für einen kraftfahrzeugscheinwerfer Download PDF

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Publication number
EP3721133B1
EP3721133B1 EP18808007.1A EP18808007A EP3721133B1 EP 3721133 B1 EP3721133 B1 EP 3721133B1 EP 18808007 A EP18808007 A EP 18808007A EP 3721133 B1 EP3721133 B1 EP 3721133B1
Authority
EP
European Patent Office
Prior art keywords
micro
optics
light
projection device
diaphragm
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP18808007.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3721133A1 (de
Inventor
Bernhard Mandl
Andreas Moser
Friedrich Bauer
Peter Schadenhofer
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
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Filing date
Publication date
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Publication of EP3721133A1 publication Critical patent/EP3721133A1/de
Application granted granted Critical
Publication of EP3721133B1 publication Critical patent/EP3721133B1/de
Active 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
    • F21S41/40—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
    • 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]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel 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
    • F21S41/10—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]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • F21S41/153—Light emitting diodes [LED] arranged in one or more lines arranged in a matrix
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/265—Composite lenses; Lenses with a patch-like shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • 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 further relates to a micro-projection light module for a motor vehicle headlight, comprising at least one projection device according to the invention and at least one light source for feeding light into the projection device.
  • the invention further relates to a vehicle headlight, in particular a motor vehicle headlight, comprising at least one micro-projection light module according to the invention.
  • the document for example, is from the prior art AT 514967 B1 has become known, which shows a projection device of the type mentioned.
  • a projection device is shown therein which has a number of micro-entry optics and micro-exit optics, with diaphragm devices being arranged between the micro-entry and exit optics.
  • the light distribution in the focal plane is cut by a beam diaphragm. With a low beam distribution, the light above the cut-off line is absorbed or reflected in order to prevent oncoming traffic from being dazzled.
  • the translucent windows provided according to the invention, light can be directed into the scattering area, which is provided, for example, for illuminating traffic signs, the intensity of the lighting in this area being able to be achieved by selecting a suitable number and design of the windows or the screen devices of the second variant .
  • An optically effective diaphragm edge is understood to mean a diaphragm edge which engages in the image of the light distribution to delimit the same.
  • essentially all of the ... emerging light means that efforts are made to radiate at least the majority of the total luminous flux that emerges from a micro-entry optic solely into the associated micro-exit optic. In particular, care should be taken not to radiate any luminous flux into the neighboring micro-exit optics in such a way that this does not result in any disadvantageous optical effects, such as scattered light which can lead to glare, etc.
  • the wording “where the micro-entry optics are designed in such a way and / or the micro-entry optics and the micro-exit optics are arranged in relation to one another” also mean that additional measures, such as diaphragms (see FIG further below) can be provided, which either exclusively or preferably in addition to their actual function also have the function that the entire luminous flux is directed precisely onto the assigned micro-exit optics.
  • both the focal lengths and the dimensions of the micro-optics are per se significantly smaller than with "conventional" optics.
  • the center thickness can also be reduced compared to conventional optics.
  • the overall depth of the projection device can be significantly reduced compared to conventional optics.
  • the luminous flux can be increased or scaled, with an upper limit with regard to the number of micro-optic systems being primarily limited by the manufacturing processes available in each case. For example, 200 to 400 micro-optic systems can be sufficient or favorable for generating a low beam function, although this is not intended to describe a limiting value upwards or downwards, but merely an exemplary number.
  • the multitude of micro-optics can be used to introduce micro-optics with different optical behavior into a projection system in order to generate or superimpose different light distributions. The multitude of micro-optics also allows design options that are not available with conventional optics.
  • Such a light module is also scalable, i.e. several identical or similarly structured light modules can be combined to form a larger overall system, e.g. a vehicle headlight.
  • the lens typically has a diameter of between 60 mm and 90 mm.
  • the individual micro-optic systems have typical dimensions of approximately 2 mm ⁇ 2 mm (in V and H) and a depth (in Z, see e.g. Figure 2 ) of approx. 6 mm - 10 mm, so that a module according to the invention has a significantly smaller depth in the Z direction compared to conventional modules.
  • the light module according to the invention or the projection device can have a small overall depth and are basically freely shapable, ie it is possible, for example, to design a first light module for generating a first partial light distribution separately from a second light module for a second partial light distribution and to design this relatively freely, ie vertically and / or to be arranged horizontally and / or offset from one another in terms of depth, so that design specifications can also be implemented more easily.
  • a light module or a projection device Another advantage of a light module or a projection device according to the invention is that the exact positioning of the light source (s) in relation to the projection device is not necessary. Exact positioning is less critical insofar as the distance between the lighting unit and the microlens array does not have to be exact. Now that the micro-entry and micro-exit optics have already been optimally matched to one another, since they form a system, an inexact positioning of the real light source (s) is less important.
  • the real light sources are, for example, approximately point-like light sources such as light-emitting diodes, whose light is directed parallel by collimators such as compound parabolic concentrators (CPC) or TIR lenses (total inner reflection).
  • the projection device or the light module can also contain additional micro-optic systems with the aid of which other types of light distributions than a low beam distribution are generated.
  • "A certain type" of light distribution is understood to mean a light distribution generated in accordance with relevant standards, for example light distribution in accordance with standards of the UN / ECE regulations in the states of the European Union, in particular regulations 123 and 48, or relevant standards in the other countries or regions .
  • Examples of such light distributions include the document AT 514967 B1 removable.
  • individual low beam micro-optics of the second variant are designed in such a way that the light distribution above the light-dark boundary is spaced from the light-dark boundary at a vertical angle between 0.5 ° and 2 °. All low beam micro-optics of the second variant could also be designed in this way.
  • individual (or all) low-beam micro-optics of the second variant are designed in such a way that the light distribution above the light-dark border spreads over a horizontal angular range between 10 ° and 50 ° and over a vertical angular range between 2 ° and 10 ° extends.
  • the at least partially transparent window of individual low beam micro-optics of the second variant has a substantially rectangular shape.
  • the course of the upper edge of the window can differ slightly in that it runs parallel to an optically effective edge of the diaphragm device, that is to say parallel to the light-dark border.
  • the at least partially transparent window of individual low beam micro-optics of the second variant is U-shaped.
  • Different configurations of transparent windows of individual screen devices can also be superimposed on one another so that the light distribution of the sign light can be optimized in a targeted manner - for example, homogenized.
  • the at least transparent window of individual low beam micro-optics of the second variant is completely transparent or only partially transparent.
  • the windows of individual low-beam micro-optics or the associated diaphragm devices can also differ from one another in terms of their shape and / or transparency. For example, it can be provided that individual windows overlap, but differ in size from one another. You are therefore responsible for shading areas that photometrically overlap each other.
  • the at least one screen device is connected to a carrier, the carrier being made of glass.
  • the entrance optics as well as the exit optics are firmly connected to at least one support of the diaphragm device arranged between the entrance optics and the exit optics. This way, undesired influences - e.g. due to thermal expansion - can be minimized and a permanent and exact positioning of the entrance optics in relation to the entrance optics and vice versa can be ensured.
  • the fixed connection of the entrance optics and the exit optics with the at least one carrier is each designed as a transparent adhesive connection.
  • the invention further relates to a micro-projection light module for a motor vehicle headlight, comprising at least one projection device according to the invention and at least one light source for feeding light into the projection device.
  • An LED light source is preferably assigned to each low beam micro-optics.
  • the invention further relates to a vehicle headlight, in particular a motor vehicle headlight, comprising at least one micro-projection light module according to the invention.
  • the invention also relates to a vehicle, in particular a motor vehicle, with at least one vehicle headlight according to the invention.
  • FIG. 1 shows a schematic representation of an exemplary projection device 1 in a micro-projection light module 6, wherein the projection device 1 - as discussed below - can be equipped with an embodiment according to the invention on diaphragm devices.
  • a projection device 1 according to the invention equipped in this way is suitable for use in a motor vehicle headlight, the projection device 1 for mapping light to at least one light source 2 assigned to the projection device 1 (however, each micro-entry optics 3a is preferably assigned an individually controllable light source, particularly preferably an LED ), is set up in an area in front of a motor vehicle in the form of at least one light distribution, namely a low beam distribution.
  • the light emitted by the light source 2 can, for example, be directed to an entry optics 3 via a collimator 7.
  • the projection device 1 comprises the entrance optics 3, which have a total number of micro-entry optics 3a, which are preferably arranged in an array, an exit optics 4, which have a total number of micro-exit optics 4a, which are preferably arranged in an array, each micro-entry optics 3a being assigned exactly one micro-exit optics 4a.
  • micro-entry optics 3a are designed and / or the micro-entry optics 3a and the micro-exit optics 4a are arranged in relation to one another in such a way that essentially all of the light exiting from a micro-entry optics 3a only enters the assigned micro-exit optics 4a, and wherein the light preformed by the micro-entry optics 3a is imaged by the micro-exit optics 4a in an area in front of the motor vehicle as at least one light distribution.
  • Each micro-entry optics 3a is designed in such a way that the micro-entry optics 3a focuses the light passing through it into at least one micro-entry optics focal point, the micro-entry optics focal point between the micro-entry optics 3a and the associated micro-exit optics 4a lies, with at least one diaphragm device 8a (see FIG Figure 3 ) is arranged, with a low beam micro-optics being formed in each case by at least the micro-entry optics 3a, the associated micro-exit optics 4a and the at least one diaphragm device 8a between them.
  • the at least one diaphragm device 8a is set up in such a way to limit the light distribution imaged by the respective micro-exit optics 4a that the light distribution emitted by the micro-exit optics 4a forms a portion of the low-beam light distribution, the diaphragm device 8a for this purpose having at least one of the course of a bright- Optically effective diaphragm edge K (see Figures 4a , 5a and 6a).
  • Figures 2 (a) to 2 (d) show a schematic representation of individual steps of a method for producing a projection device 1 according to the invention for a motor vehicle headlight, the projection device 1 being set up to image light from at least one light source 2 assigned to the projection device 1 in an area in front of a motor vehicle in the form of at least one light distribution.
  • Figure 2 (a) shows a carrier 5 with a first flat side 5a on which in FIG Figure 2 (b) a first screen device 8a, for example by screen printing or metallic vapor deposition, is applied, the carrier 5 at least partially consisting of glass.
  • Figure 2 (c) shows the next step b) of the method, namely the fastening of an entrance optic 3, which has a number of micro entrance optics 3a, which are preferably arranged in an array, on the first flat side 5a of the carrier 5, the entrance optics 3 being the first diaphragm device 8a is at least partially covered and arranged in such a way that light can at least partially enter the carrier 5 via the entrance optics 3 through the first aperture device 8a, and the entrance optics 3 are fastened to the first flat side 5a of the carrier 5 by means of a translucent adhesive.
  • Figure 3 (d) shows a state in which the entrance optics 3 is already firmly connected to the carrier 5.
  • a second diaphragm device can be applied - for example to avoid scattered light - on a second flat side 5b of the carrier 5 opposite the first flat side 5a.
  • the exit optics 4 can then take place on the opposite flat side of the carrier 5.
  • Figures 3a, 3b and 3c show different configurations of diaphragm devices.
  • Figure 3a relates to a conventional diaphragm device 8a ' , which is referred to in this document as the diaphragm device 8a' of the first variant.
  • Figures 3b and 3c relate to diaphragm devices 8a ′′ of the second variant, each of which has light-permeable windows F, which are provided to allow light into one above the light-dark boundary to direct lying area.
  • Figure 4a a section of an arrangement of several diaphragm devices 8a 'and 8a "lined up next to one another according to an embodiment of the invention.
  • the light distribution to be mapped above the light-dark border can be specified in a targeted manner.
  • Figure 4b shows one with the arrangement according to Figure 4a generated light distribution in which the light distribution Lsign above the light-dark border is clearly recognizable.
  • the brightness within the light distribution is made clear by isolines that show areas of equal illuminance. In the present illustration, the illuminance takes a maximum just below the cut-off line and decreases towards the outside. The course of the Corposcuro border and the additional Lsign light distribution above it can be clearly seen.
  • Figure 5a shows a section of an arrangement of several diaphragm devices 8a 'and 8a ′′ lined up next to one another according to a further embodiment of the invention, the geometric configuration of individual diaphragm devices 8a ′′ of the second variant being varied in a targeted manner so that the brightness within the light distribution Lsign (see FIG Figure 5b ) is homogenized.
  • micro-optics In the projection system according to the invention, several tens to several thousand miniaturized micro-optics can be lined up to form an array. This array is illuminated with light that is as parallel as possible (preferably by means of collimators). The individual light distributions are superimposed to form the desired overall light distribution.
  • the shutter devices 8a 'and 8a can be made, for example, lithographically.
  • contours of the window F can also be provided.
  • about 3 ⁇ 4 of the window F can be partially closed. This can also be achieved by designing the area to be closed with a transmittance of 25% for all openings. In this way, with the help of a varying degree of transmittance, Signlight can also be generated at the points on the radiation diaphragm that are desired for Signlight.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP18808007.1A 2017-12-05 2018-11-27 Projektionseinrichtung für einen kraftfahrzeugscheinwerfer Active EP3721133B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP17205396 2017-12-05
PCT/EP2018/082676 WO2019110374A1 (de) 2017-12-05 2018-11-27 Projektionseinrichtung für einen kraftfahrzeugscheinwerfer

Publications (2)

Publication Number Publication Date
EP3721133A1 EP3721133A1 (de) 2020-10-14
EP3721133B1 true EP3721133B1 (de) 2021-09-08

Family

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EP18808007.1A Active EP3721133B1 (de) 2017-12-05 2018-11-27 Projektionseinrichtung für einen kraftfahrzeugscheinwerfer

Country Status (6)

Country Link
US (1) US10995927B2 (ja)
EP (1) EP3721133B1 (ja)
JP (1) JP6999036B2 (ja)
KR (1) KR20200087866A (ja)
CN (1) CN111492172B (ja)
WO (1) WO2019110374A1 (ja)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102617541B1 (ko) 2018-11-02 2023-12-26 에스엘 주식회사 차량용 램프
KR102348900B1 (ko) * 2020-06-29 2022-01-11 에스엘 주식회사 차량용 램프
KR20220011393A (ko) * 2020-07-21 2022-01-28 에스엘 주식회사 차량용 램프
EP4316911A1 (de) 2022-08-01 2024-02-07 ZKW Group GmbH Kraftfahrzeuglichtsystem zur abstrahlung von positionsbegrenzten bodenprojektionen
FR3141507A1 (fr) * 2022-10-30 2024-05-03 Valeo Vision Dispositif lumineux configuré pour réaliser une pluralité de fonctions lumineuses.

Family Cites Families (13)

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Publication number Priority date Publication date Assignee Title
JPH046084Y2 (ja) * 1987-03-31 1992-02-20
US6769777B1 (en) * 2003-08-20 2004-08-03 Honeywell International Inc. Multi-aperture optical dimming system
JP4995748B2 (ja) 2008-01-29 2012-08-08 株式会社小糸製作所 車両用前照灯装置及び車両用前照灯装置の制御方法
JP2010108689A (ja) * 2008-10-29 2010-05-13 Stanley Electric Co Ltd プロジェクター型ヘッドランプ
KR101491989B1 (ko) * 2008-12-16 2015-02-10 현대모비스 주식회사 차량용 헤드램프
JP5958004B2 (ja) * 2012-03-23 2016-07-27 スタンレー電気株式会社 車両用灯具
WO2014164792A1 (en) * 2013-03-12 2014-10-09 Lpi-Europe, S.L. Thin luminaire
AT514967B1 (de) 2013-10-25 2015-08-15 Zizala Lichtsysteme Gmbh Mikroprojektions-Lichtmodul für einen Kraftfahrzeugscheinwerfer
US9982864B2 (en) * 2014-02-27 2018-05-29 Panasonic Intellectual Property Management Co., Ltd. Illumination apparatus and automobile equipped with same
DE102014205450A1 (de) * 2014-03-24 2015-09-24 Osram Gmbh Lichtquellenanordnung
DE102014019344A1 (de) * 2014-12-22 2016-06-23 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Kraftfahrzeugscheinwerfer, Kraftfahrzeugscheinwerfersystem, Kraftfahrzeug sowie Verfahren zum Betrieb eines Kraftfahrzeugs
AT517885B1 (de) * 2015-10-23 2018-08-15 Zkw Group Gmbh Mikroprojektions-Lichtmodul für einen Kraftfahrzeugscheinwerfer zur Erzeugung von abbildungsfehlerfreien Lichtverteilungen
DE102016204344A1 (de) * 2016-03-16 2017-09-21 Bayerische Motoren Werke Aktiengesellschaft Scheinwerfer für ein Kraftfahrzeug

Also Published As

Publication number Publication date
KR20200087866A (ko) 2020-07-21
EP3721133A1 (de) 2020-10-14
JP2021506066A (ja) 2021-02-18
US20200300435A1 (en) 2020-09-24
CN111492172B (zh) 2022-09-13
JP6999036B2 (ja) 2022-02-04
CN111492172A (zh) 2020-08-04
US10995927B2 (en) 2021-05-04
WO2019110374A1 (de) 2019-06-13

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