EP3752765A1 - Projecteur de véhicule automobile comprenant un écran de protection pour la protection contre le rayonnement solaire incident - Google Patents

Projecteur de véhicule automobile comprenant un écran de protection pour la protection contre le rayonnement solaire incident

Info

Publication number
EP3752765A1
EP3752765A1 EP19705093.3A EP19705093A EP3752765A1 EP 3752765 A1 EP3752765 A1 EP 3752765A1 EP 19705093 A EP19705093 A EP 19705093A EP 3752765 A1 EP3752765 A1 EP 3752765A1
Authority
EP
European Patent Office
Prior art keywords
light
motor vehicle
shielding
shielding screen
vehicle headlight
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
EP19705093.3A
Other languages
German (de)
English (en)
Other versions
EP3752765B1 (fr
Inventor
Lukas Taudt
Nina Brauner
Mathias SCHRAGL
Christoph Längauer
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
Publication of EP3752765A1 publication Critical patent/EP3752765A1/fr
Application granted granted Critical
Publication of EP3752765B1 publication Critical patent/EP3752765B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F21S41/255—Lenses with a front view of circular or truncated circular outline
    • 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
    • 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
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching 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
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/10—Protection of lighting devices
    • 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

  • the invention relates to a motor vehicle headlight with a shielding screen for shielding incoming solar radiation, wherein the shielding screen is arranged between a lighting unit with at least one light source and a projection optics, and it has a light exit opening for radiated from the light unit forward light, wherein the light unit Outgoing light is projected by means of the projection optics as a light image in the traffic space and the shielding is outside the focal plane of the projection optics.
  • the document DE 10 2013 214 990 A1 shows a lens holder in the form of a conical tube which is internally provided with a metal coating in order to prevent damage to this lens holder by solar radiation. In order to further reduce the heating of the lens holder, it may additionally have grooves in the area of the metal coating.
  • a screening screen of the objective kind in front of a lighting unit, e.g. an LED light source module, wherein the shielding screen has a light exit opening for light emitted from the light unit forward, occurs as a disturbing
  • shielding screen in this specification is used for a cover used for avoiding the sunburst effect of the sun, which cover need not necessarily be made of metallic sheet metal. Rather, the cover can also be made of plastics and the shielding screen, whether made of metal or plastic, a radiation-absorbing
  • Shielding at least partially deflecting structures are formed, which lead to deflection of the emanating from the light unit, undesirable in the light image scattered light.
  • outgoing light from the light unit or light source of the headlamp is no longer reflected at the border of the light exit opening of the shielding screen in the direction of the projection optics, whereby unwanted scattered light in the projected onto the street photo can be significantly reduced.
  • the border of the light exit opening of the shielding screen has, as a deflection structure, at least in some areas a bevelled edge, the thickness being over the thickness
  • Lighting unit is inclined at a predetermined angle.
  • predetermined angle is angled in an angling.
  • Deflection structures are formed in the form of a plurality of prongs for deflecting disturbing, received by the lighting unit edge beams. It has proven to be expedient if 20 to 400, in particular 50 to 200 spikes are provided on one side of the border in the longitudinal extension of the light exit opening.
  • the invention is particularly useful in a headlamp in which an optical attachment is arranged in the beam path between the light source and the shielding.
  • Shield is arranged in front of the focal plane of the projection lens.
  • the invention also offers particular advantages when the light source comprises a number of LEDs arranged in a matrix.
  • the shield is made of metal.
  • the shield is made of plastic.
  • FIG. 1 schematically and in diagrammatic representation of components of a headlamp, namely a lighting unit with superior shielding screen for shielding incoming solar radiation and a projection lens,
  • FIG. 2 shows a schematic section through a headlamp of the subject type with the components shown in FIG. 1, wherein some essential beam paths are shown, FIG.
  • FIG. 3 is a front view of a shield of a first embodiment of the invention
  • FIG. 4 shows a section along the line IV-IV of FIG. 3, which shows a deflection structure of the first embodiment
  • FIG. 5 shows a view of a shielding screen of a second embodiment of the invention from the front
  • FIG. 6 shows a section along the line VI-VI of FIG. 5, which shows a deflection structure of the second embodiment, FIG.
  • FIG. 7 is an enlarged detail of the deflection structure of FIG. 6,
  • FIG. 8 shows, for example, a light distribution of a headlamp with a shielding screen according to the second embodiment of the invention according to FIGS. 5 to 7, FIG.
  • FIG. 9 shows, for example, a light distribution of a headlamp with a shielding screen according to the prior art
  • Embodiments according to the invention show.
  • FIG. 1 and Fig. 2 can be seen in a schematic view of a headlight 1 according to the invention with its for the explanation of the invention
  • Adjustment devices When in the
  • headlight In connection with the invention, the term “headlight” is used, so this term should include individual projection modules, which may also be included in combination in a parent headlight.
  • the headlight 1 has a light unit 2, in which a number of LEDs 5 is arranged in a matrix as light source 3 on a printed circuit board 4.
  • the LEDs 5 are preceded by an optical attachment 6, which is held by a holder 7 here on the circuit board 4.
  • the LEDs 5 emit their light into the light-conducting attachment optics 6, which emits a desired light pattern to the front. This light pattern is projected into the traffic space by means of projection optics 8, which in the present case is an integral lens.
  • a shielding screen 9 is arranged for shielding incoming solar radiation, in which a
  • Light exit opening 10 is formed.
  • FIG. 2 it can be seen that the individual parts are accommodated or held in a housing 11, which is shown only roughly schematically.
  • the headlight 1 shown in FIGS. 1 and 2 corresponds to the state of the art with regard to the embodiment of its shielding screen 9 and, in the following, the problematic nature of the undesired beam occurring here is based on a fundamental beam path
  • the beam path of the light emitted by the light unit 2 is shown in Fig. 2 with L e
  • This light or the beam path L e extends from the front of the
  • Sunbeams incident at an angle of about 45 ° in this example are denoted by Ls in FIG.
  • the incident sunbeams are focused by the projection optics 8 and, in the absence of the shielding screen 9, would impinge concentratedly on a focal spot on the front of the attachment optics where they could cause damage, namely by overheating of components such as the bracket 7, often Made of heat-sensitive plastic.
  • Such overheating can not only damage such as e.g. warping of adjusted elements, but even local fires and vehicle fires.
  • Ableblende impinge which may be designed according to their purpose heat resistant and absorbent and / or reflective.
  • the light rays which would reach the light unit 2 without shielding screen 9 are denoted by L s '.
  • the shielding screen 9 does not affect those rays L e which are supposed to produce the light image on the road, in practice they are never perfect
  • Attachment optics 6 also intrinsically unwanted marginal rays LR off, which at the in
  • the invention now provides, at least in some areas, deflecting structures at the border of the light exit opening of the shielding screen, which lead to a reduction of the scattered light arising at the border.
  • FIGS. 3 and 4 show a first inventive design of the deflection structures. According to Fig. 3 is in the shield 9
  • Light aperture 10 and the edge 13 is formed so that the desired light image generating beam path is not cropped.
  • the border 13 is angled at a predetermined angle relative to the optical axis a, so that an angled edge region 14 is created.
  • Angling the border 13 need not necessarily be made over the entire border, it is usually sufficient in some areas angling, preferably in the lower part of the border. Whether the bend extends in the direction of the lighting unit 2 or in the direction of the projection optical system 8 is substantially irrelevant, as will be explained in greater detail below. In the section of Fig. 4 can be seen that the
  • Invention underlying principle which consists in that of the light unit 2 and its attachment optics 6 incident edge rays L R at the now no longer horizontally extending inner boundary surface 12 of the border 13 of the light exit opening 10 are no longer reflected in the direction of the projection optics, but in the present case to the rear in the direction of the lighting unit. Unwanted light artifacts in the light image due to the marginal rays LR are thereby avoided.
  • the shielding screen 9 unlike diaphragms, which define the borders of the illumination image and therefore should be sharply imaged, does not lie in the focal plane of the projection optics 8, but outside, in a meaningful way, in front of it. Limitations of the illumination image are determined by the lighting unit 2 or the attachment optics 6 and not by the light exit opening 10 of the shielding screen 9.
  • An example of a diaphragm in the focal plane of the projection optics can be found in EP 2 742 282 B1 of the Applicant. Another embodiment of a deflection structure in the context of the invention will now be explained with reference to FIGS. 5, 6 and 7.
  • a light exit opening 10 is formed with a border 13 in the shielding screen 9, wherein this border has in its upper and in its lower portion a plurality of prongs 15 for deflecting disturbing, from the light unit 2 ein Siemens marginal rays L R.
  • this border has in its upper and in its lower portion a plurality of prongs 15 for deflecting disturbing, from the light unit 2 ein Siemens marginal rays L R.
  • prongs is not necessarily intended to include "pointed” elevations but quite generally embossments, wherein typically on one longitudinal side of the light exit opening 20 to 400, usually 50 to 200 such elevations are provided.
  • the approximately rectangular light exit opening 10 of the shield 9 was 80 mm wide and 18 mm high and the prongs 15 a height and width between 0.5 up to 2 mm.
  • FIG. 9 shows stray light regions above and below the desired light image, of which the upper region is particularly pronounced.
  • FIG. 9 shows scattered light regions above and below the desired light image.
  • FIG. When applying the described inventive design with teeth on the border - Fig. 8 - reaches the unwanted scattered light a maximum light intensity of 162 cd, in a training without jaws, however, 323 cd.
  • Fig. 10a shows again in a detail of Fig. 2, the unwanted reflection of
  • FIG. 10b shows an embodiment in which the edge of the shielding screen 9 as a deflecting at least partially has a beveled edge 17, wherein the over the thickness of the shielding screen 9 extending bevel in the direction of the optical axis a and the lighting unit is inclined at a predetermined angle.
  • the inclination of this angle is opposite to that of Fig. 10b, but in both cases, the incoming edge beams L R are kept away from the projection optics as deflected light beams L A.
  • FIG. 10d and FIG. 10e show angled edge regions analogous to FIG. 4, wherein the bend 18 in FIG. 10d extends backwards in the direction of the lighting unit, but in FIG. 10e, forwards, toward the projection optics. How to look at the ray trajectory of the
  • FIG. 10f shows an embodiment in which the border is at least partially tapered in the manner of a cutting edge 19, the effect of reducing the scattered light also being evident here, since there is no areal region, which marginal rays L R are deflected light rays L A could lead in the direction of the projection optics, but a beveled edge 17 as in the embodiment of FIG. 10c is effective.
  • a special light unit 2 has been shown and described, namely a lighting unit for a so-called “matrix headlight” with a larger number of LEDs and a front optics with optical fibers, it should be clear that the invention by no means to a certain
  • Light unit is limited. It is neither a front optics nor a matrix-like arrangement of LEDs for the realization of the invention required, as well as other bulbs instead of LEDs, such as laser diodes with light converters, these can also be used with scanning laser beams, gas discharge lamps and the like.

Landscapes

  • 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)

Abstract

L'invention concerne un projecteur de véhicule automobile comprenant un écran de protection (9) pour la protection contre un rayonnement solaire incident. L'écran de protection est disposé entre une unité d'éclairage (2) pourvue d'au moins une source de lumière (3) et une optique de projection (8), et il comporte une ouverture de sortie de lumière (10) pour de la lumière émise vers l'avant par l'unité d'éclairage. La lumière provenant de l'unité d'éclairage est projetée au moyen de l'optique de projection en tant que photo dans l'espace de circulation. L'écran de protection se situe à l'extérieur du plan focal de l'optique de projection. Des structures de déviation (14, 15, 16, 17, 18, 19) sont réalisées au moins par endroits sur le rebord (13) de l'ouverture de sortie de lumière (10) de l'écran de protection (9) et entraînent une déviation de la lumière diffusée provenant de l'unité d'éclairage, non souhaitée dans la photo.
EP19705093.3A 2018-02-15 2019-01-22 Phare de véhicule automobile a écran contre le rayonnement solaire entrant Active EP3752765B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP18156939.3A EP3527875A1 (fr) 2018-02-15 2018-02-15 Phare de véhicule automobile pourvu d'un condensateur plan
PCT/EP2019/051435 WO2019158319A1 (fr) 2018-02-15 2019-01-22 Projecteur de véhicule automobile comprenant un écran de protection pour la protection contre le rayonnement solaire incident

Publications (2)

Publication Number Publication Date
EP3752765A1 true EP3752765A1 (fr) 2020-12-23
EP3752765B1 EP3752765B1 (fr) 2022-10-26

Family

ID=61226477

Family Applications (2)

Application Number Title Priority Date Filing Date
EP18156939.3A Withdrawn EP3527875A1 (fr) 2018-02-15 2018-02-15 Phare de véhicule automobile pourvu d'un condensateur plan
EP19705093.3A Active EP3752765B1 (fr) 2018-02-15 2019-01-22 Phare de véhicule automobile a écran contre le rayonnement solaire entrant

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP18156939.3A Withdrawn EP3527875A1 (fr) 2018-02-15 2018-02-15 Phare de véhicule automobile pourvu d'un condensateur plan

Country Status (6)

Country Link
US (1) US11371671B2 (fr)
EP (2) EP3527875A1 (fr)
JP (1) JP7019824B2 (fr)
KR (1) KR102429313B1 (fr)
CN (1) CN111699344B (fr)
WO (1) WO2019158319A1 (fr)

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FR3105351B1 (fr) * 2019-12-18 2022-12-16 Valeo Vision Module lumineux de véhicule automobile.
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JP2022060094A (ja) * 2020-10-02 2022-04-14 株式会社小糸製作所 灯具ユニット
WO2023276256A1 (fr) * 2021-06-30 2023-01-05 京セラ株式会社 Dispositif d'éclairage
JP7113999B1 (ja) * 2021-06-30 2022-08-05 京セラ株式会社 照明装置
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Also Published As

Publication number Publication date
JP2021512466A (ja) 2021-05-13
EP3752765B1 (fr) 2022-10-26
KR20200110680A (ko) 2020-09-24
US11371671B2 (en) 2022-06-28
WO2019158319A1 (fr) 2019-08-22
US20210003263A1 (en) 2021-01-07
KR102429313B1 (ko) 2022-08-04
CN111699344A (zh) 2020-09-22
JP7019824B2 (ja) 2022-02-15
CN111699344B (zh) 2022-09-30
EP3527875A1 (fr) 2019-08-21

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