EP3686483A1 - Dispositif d'éclairage pour un phare de véhicule automobile - Google Patents

Dispositif d'éclairage pour un phare de véhicule automobile Download PDF

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Publication number
EP3686483A1
EP3686483A1 EP19153239.9A EP19153239A EP3686483A1 EP 3686483 A1 EP3686483 A1 EP 3686483A1 EP 19153239 A EP19153239 A EP 19153239A EP 3686483 A1 EP3686483 A1 EP 3686483A1
Authority
EP
European Patent Office
Prior art keywords
light
light source
deflection
lighting device
designed
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Withdrawn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
EP19153239.9A
Other languages
German (de)
English (en)
Inventor
Thomas MITTERLEHNER
Stefan MITTERLEHNER
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 EP19153239.9A priority Critical patent/EP3686483A1/fr
Priority to US17/424,274 priority patent/US11592153B2/en
Priority to EP19817310.6A priority patent/EP3914857B1/fr
Priority to JP2021542379A priority patent/JP7198934B2/ja
Priority to CN201980090253.3A priority patent/CN113348324B/zh
Priority to PCT/EP2019/084809 priority patent/WO2020151873A1/fr
Priority to KR1020217024522A priority patent/KR102598839B1/ko
Publication of EP3686483A1 publication Critical patent/EP3686483A1/fr
Withdrawn legal-status Critical Current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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/63—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates
    • F21S41/635—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by moving refractors, filters or transparent cover plates
    • 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
    • F21S41/16—Laser light sources
    • 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
    • F21S41/18—Combination of light sources of different types or shapes
    • 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
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
    • 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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/67—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors
    • F21S41/675—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors by moving reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
    • 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
    • F21Y2113/00—Combination of light sources
    • F21Y2113/20—Combination of light sources of different form
    • 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]
    • 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
    • F21Y2115/30—Semiconductor lasers

Definitions

  • the invention further relates to a motor vehicle headlight, comprising at least one lighting device according to the invention.
  • the light image is described on the basis of a projection onto a vertical surface in accordance with the relevant standards relating to automotive lighting technology, with a variably controllable reflector surface consisting of a plurality of micromirrors is formed and reflects light rays emitting from a first illuminant in a radiation direction of the headlight.
  • Any light functions with different light distributions can be implemented, such as a low beam light distribution, a cornering light light distribution, a city light light distribution, a motorway light light distribution, a cornering light light distribution, a high beam light distribution or the mapping of glare-free high beam.
  • symbol projections can also take place, such as danger symbols, navigation arrows, manufacturer logos or the like.
  • the so-called "digital light processing" projection technology - DLP for short - is preferably used, in which images are generated by modulating a digital image onto a light beam.
  • a rectangular arrangement of movable micromirrors also referred to as pixels, divides the light beam into partial areas and then reflects or deflects it pixel by pixel either into the projection path or out of the projection path.
  • the basis for this technology is preferably an optoelectronic component which contains the rectangular arrangement in the form of a matrix of micromirrors and their control technology, for example a "digital micromirror device" - DMD for short.
  • a DMD microsystem is an area light modulator (Spatial Light Modulator, SLM) that consists of micro-mirror actuators arranged in a matrix, i.e. tiltable or pivotable reflecting surfaces, for example with an edge length of about 7 microns.
  • SLM spatial Light Modulator
  • the mirror surfaces are designed in such a way that they can be moved by the action of electrostatic fields.
  • Each micromirror can be individually adjusted in angle and generally has two stable end states, between which it is possible to switch up to 5000 times within a second, for example.
  • micromirrors corresponds to the resolution of the projected image, whereby a micromirror can represent one or more pixels.
  • DMD chips with high resolutions in the megapixel range are now available.
  • the light distribution generated for example for a glare-free high beam, can be dynamically controlled such that oncoming vehicles are detected and the light distribution generated, for example, by a matrix of LED light sources is darkened in the direction of the oncoming vehicle.
  • the first deflection device comprises at least one second light source, which at least one second light source has a main emission direction in which light rays from the second light source can be emitted, the at least one second light source being arranged on the deflection surface of the first deflection device in this way, that the main radiation direction is parallel to the second radiation direction.
  • the at least one first light source is configured, for example, to implement basic lighting or apron lighting in front of the lighting device, the at least one second light source being provided to generate an additional light spot, for example for high beam distribution in front of the lighting device, or to the first deflection device map.
  • the main emission direction of the at least one second light source should be as close as possible or almost parallel or completely parallel to the second emission direction, since the second deflection device - if it is designed as a DMD - is specified with very small light entry angle ranges, i.e. If light rays hit the DMD micromirrors too steeply or too flatly, this can lead to backlighting of the micromirrors, which in turn leads to scattered light in the projecting light image and thus to poor light-dark contrast, which is extremely important when used for a motor vehicle headlight.
  • the term “projectable in front of the lighting device” means projecting in the direction of travel of a motor vehicle in which the lighting device is installed.
  • direction of travel denotes the direction in which a driven motor vehicle moves as designed.
  • a technically possible reversing is not defined as the direction of travel.
  • Main emission direction is to be understood as the direction in which the first or the second light source emits the most or the most light due to its directivity.
  • the at least one second light source is arranged in the geometric center of the deflection surface of the first deflection device. wherein the deflection surface preferably has a recess for the at least one second light source.
  • the geometric center is also understood to mean, for example, the geometric center of gravity. This corresponds mathematically to the averaging of all points within a figure, in this case a surface. Such surfaces can, for example, also be designed as quadrics, that is to say surfaces of second order.
  • paraboloid or hyperboloid
  • axis of rotation about which a parabola (or hyperbola) is rotated to produce a paraboloid intersects the paraboloid surface is also understood as a geometric center, for example.
  • the first deflection device can, for example, be designed such that it or the deflection surface has an opening or opening through which the at least one second light source can emit light beams onto the second deflection device.
  • the first deflection device has a holder on which the deflection surface is arranged, the holder having an opening in which the at least one second light source is arranged.
  • the holder is designed as a heat sink and is designed to dissipate the heat generated at the at least one second light source.
  • the first deflection device has exactly one second light source.
  • the at least one second light source is designed as a light-emitting diode or as a laser light source with a light conversion means.
  • This light conversion element is designed, for example, in the form of one or more photoluminescence converters or photoluminescence elements, with incident laser beams from the laser device striking the light conversion element, which as a rule has photoluminescent dye, and excite this photoluminescent dye for photoluminescence, and thereby light in a wavelength different from the light of the irradiating laser device Emits wavelength ranges.
  • the light output of the light conversion element essentially has characteristics of a Lambertian radiator.
  • transmissive and transmissive refer to the blue portion of the converted white light.
  • transmissive the main direction of propagation of the blue light component after passing through the converter volume or conversion element is essentially the same direction as the direction of propagation of the output laser beam.
  • the laser beam is reflected or deflected at an interface attributable to the conversion element, so that the blue light component has a different direction of propagation than the laser beam, which is usually designed as a blue laser beam.
  • the at least one second light source has a front lens system, which front lens system is designed as a collimator.
  • a collimator is understood to mean such a device which is set up to align light beams parallel to one another.
  • the attachment optics are thus located in the beam path of the first light source between the first light source and the first deflection device.
  • the front lens system is designed as a collimator.
  • the second deflection device is designed as a digital micromirror array with a plurality of micromirrors which can be arranged next to one another in the manner of an array and can be controlled individually or in groups.
  • Each micromirror can be individually adjusted in its angle and usually has two stable end states between which it can be tilted.
  • the second deflection device can advantageously be designed as a DMD.
  • the shape of the radiation light distribution of the lighting device By moving individual or a group of selected deflection elements in a targeted manner, the shape of the radiation light distribution of the lighting device, but also the light intensity distribution within the radiation light distribution, can be varied.
  • the radiation distribution can thus be changed dynamically both in terms of its shape (extension and / or extension) and in terms of its brightness distribution.
  • the control of the deflection elements, and thus the variation of the light distribution can take place depending on the operating parameters of the motor vehicle (e.g. vehicle speed, loading, steering angle, lateral acceleration, etc.).
  • environmental parameters of the vehicle e.g. outside temperature, precipitation, other road users detected in the vehicle's surroundings, etc.
  • environmental parameters of the vehicle e.g. outside temperature, precipitation, other road users detected in the vehicle's surroundings, etc.
  • the at least one first light source is designed as at least one light-emitting diode.
  • each light emitting diode can be controlled independently of the other light emitting diodes.
  • Each light-emitting diode can thus be switched on and off independently of the other light-emitting diodes of a light source, and preferably, if the light-emitting diodes are dimmable, can also be dimmed independently of the other light-emitting diodes of the light source.
  • the lighting device comprises at least two first light sources, preferably exactly two first light sources.
  • the first radiation direction is parallel to the third radiation direction.
  • the deflection surface of the first deflection device is designed as a hyperbolic or as a parabolic reflector.
  • the deflection surface can also have other shapes, for example an ellipsoid.
  • the first deflection device bundles light beams from the at least one first light source to a point which is located behind the second deflection device in the direction of the second radiation direction.
  • the object is also achieved by a motor vehicle headlight with at least one lighting device according to the invention.
  • Fig. 1 shows an exemplary lighting device 10 for a motor vehicle headlight
  • the lighting device 10 comprises two first light sources 50 , which are provided for emitting light beams in a first emission direction X1 and are designed as light-emitting diodes, and a first deflection device 100 with a deflection surface 110 , which deflection surface 110 is set up for this purpose is to deflect at least some of the light beams of the first light sources 50 into a second emission direction X2 .
  • the first deflection device 100 further comprises a holder 130 , on which holder 130 the deflection surface 110 is arranged or fastened.
  • the first light sources 50 are each followed by a front lens system 51 , which front lens systems 51 are designed as collimators and align the light beams emitted by the light sources 50 parallel to one another, the parallel light beams being emitted onto the first deflection device 100 or onto the deflection surface 110 .
  • the lighting device 10 further comprises a second deflection device 200 , which is designed as a digital micromirror array (DMD for short) with a multiplicity of micromirrors which can be arranged next to one another in an array, individually or in groups, the micromirrors being controllable and movable independently of one another, and the micromirrors for deflecting at least part of the light beams of the light beams deflected by the first deflection device 100 are provided in a third radiation direction X3 and for generating a light distribution in front of the lighting device 10 .
  • DMD digital micromirror array
  • Each micromirror can be individually adjusted in its angle and usually has two stable end states between which it can be tilted.
  • the first radiation direction X1 can, as in the example shown in FIGS Figures 1 and 2nd can be arranged parallel to the third radiation direction X3.
  • Fig. 3 shows a more detailed sectional view of the first deflection device 100 , wherein it can be seen that the first deflection device 100 comprises a second light source 60 , which has a main emission direction A , into which light beams of the second light source 60 can be emitted, the second light source 60 being in the geometric center of FIG Deflection surface 110 is arranged.
  • the holder 130 has an opening 140 , in which the second light source 60 is arranged, the deflection surface 110 having a recess 120 for the second light source 60 , so that the light beams emitted by the second light source 60 in the direction of the second emission direction X2 second deflection device 200 can be emitted.
  • the main emission direction A of the second light source 60 is arranged parallel to the second emission direction X2 or emits the second light source 60 essentially in the same direction in which the light rays of the first light sources 50 are deflected by the first deflection device 100 .
  • the geometric center is also understood to mean, for example, the geometric center of gravity. This corresponds mathematically to the averaging of all points within a figure, in this case a surface. Such surfaces can, for example, also be designed as quadrics, that is to say surfaces of second order.
  • the deflection surface 110 can be designed, for example, as a parabolic or as a hyperbolic reflector or reflector surface.
  • paraboloid or hyperboloid
  • the point in the case of a paraboloid (or hyperboloid) in which the axis of rotation about which a parabola (or hyperbola) is rotated to produce a paraboloid (or hyperboloid) intersects the paraboloid surface (hyperboloid surface) can also be understood as a geometric center .
  • the deflecting surface 110 or the first deflecting device 100 can also be designed such that the light beams of the first light sources are essentially focused on one point, which point is located behind the second deflecting device 200 in the direction of the second emission direction X2 .
  • This point can also be understood to mean an area with a spatial extent, which generally means that the parallel light beams of one of the first light sources 50 intersect the parallel light beams of the other first light source 50 in one point or area.
  • the second light source 60 is designed as a laser light source with a light conversion element, the second light source 60 being followed by an auxiliary lens 61 in the main emission direction A , which is designed as a collimator.
  • Fig. 4 shows a perspective front view of the first deflection device 100 , the deflection surface 110 and the recess 120 provided on the deflection surface 110 being recognizable once again.
  • Fig. 5 shows a perspective rear view of the first deflection device 100 , wherein the holder 130 can be seen more clearly, the holder 130 being designed as a heat sink, which heat sink is designed to dissipate the heat generated at the second light source 60 , preferably to the surroundings.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
EP19153239.9A 2019-01-23 2019-01-23 Dispositif d'éclairage pour un phare de véhicule automobile Withdrawn EP3686483A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP19153239.9A EP3686483A1 (fr) 2019-01-23 2019-01-23 Dispositif d'éclairage pour un phare de véhicule automobile
US17/424,274 US11592153B2 (en) 2019-01-23 2019-12-12 Lighting apparatus for a motor vehicle headlamp
EP19817310.6A EP3914857B1 (fr) 2019-01-23 2019-12-12 Dispositif d'éclairage pour un phare de véhicule automobile
JP2021542379A JP7198934B2 (ja) 2019-01-23 2019-12-12 自動車前照灯用照明装置及び自動車前照灯
CN201980090253.3A CN113348324B (zh) 2019-01-23 2019-12-12 用于机动车前照灯的照明设备
PCT/EP2019/084809 WO2020151873A1 (fr) 2019-01-23 2019-12-12 Dispositif d'éclairage pour projecteur de véhicule automobile
KR1020217024522A KR102598839B1 (ko) 2019-01-23 2019-12-12 자동차 헤드램프용 조명 장치

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19153239.9A EP3686483A1 (fr) 2019-01-23 2019-01-23 Dispositif d'éclairage pour un phare de véhicule automobile

Publications (1)

Publication Number Publication Date
EP3686483A1 true EP3686483A1 (fr) 2020-07-29

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP19153239.9A Withdrawn EP3686483A1 (fr) 2019-01-23 2019-01-23 Dispositif d'éclairage pour un phare de véhicule automobile
EP19817310.6A Active EP3914857B1 (fr) 2019-01-23 2019-12-12 Dispositif d'éclairage pour un phare de véhicule automobile

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP19817310.6A Active EP3914857B1 (fr) 2019-01-23 2019-12-12 Dispositif d'éclairage pour un phare de véhicule automobile

Country Status (6)

Country Link
US (1) US11592153B2 (fr)
EP (2) EP3686483A1 (fr)
JP (1) JP7198934B2 (fr)
KR (1) KR102598839B1 (fr)
CN (1) CN113348324B (fr)
WO (1) WO2020151873A1 (fr)

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EP3914857B1 (fr) 2024-02-07
EP3914857A1 (fr) 2021-12-01
US11592153B2 (en) 2023-02-28
JP2022518503A (ja) 2022-03-15
US20220065420A1 (en) 2022-03-03
CN113348324A (zh) 2021-09-03
CN113348324B (zh) 2024-02-13
KR20210110863A (ko) 2021-09-09
WO2020151873A1 (fr) 2020-07-30
KR102598839B1 (ko) 2023-11-07

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