EP3966495B1 - Phare pour véhicules - Google Patents

Phare pour véhicules Download PDF

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Publication number
EP3966495B1
EP3966495B1 EP20800796.3A EP20800796A EP3966495B1 EP 3966495 B1 EP3966495 B1 EP 3966495B1 EP 20800796 A EP20800796 A EP 20800796A EP 3966495 B1 EP3966495 B1 EP 3966495B1
Authority
EP
European Patent Office
Prior art keywords
reflector
focal point
headlight according
light source
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.)
Active
Application number
EP20800796.3A
Other languages
German (de)
English (en)
Other versions
EP3966495A1 (fr
Inventor
Gerhard Berger
Raimund Kerschbaummayr
Daniel Hochwarter
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.)
Hella GmbH and Co KGaA
Original Assignee
Hella GmbH and Co KGaA
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 Hella GmbH and Co KGaA filed Critical Hella GmbH and Co KGaA
Publication of EP3966495A1 publication Critical patent/EP3966495A1/fr
Application granted granted Critical
Publication of EP3966495B1 publication Critical patent/EP3966495B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/143—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
    • F21S41/30—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
    • F21S41/322—Optical layout thereof the reflector using total internal reflection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/334—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of patch like sectors
    • 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
    • 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
    • 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 headlight for vehicles with a light source, with a reflector arrangement containing at least one reflector module with a first reflector which has a reflector surface which has a first focal point and a second focal point, the light source being arranged in the first focal point, and a second reflector having a reflector surface having a focal point coincident with the second focal point of the first reflector.
  • a headlight for vehicles which has a light source and a reflector arrangement.
  • the reflector arrangement has a first reflector with an ellipsoidal surface.
  • the first reflector is assigned directly to the light source.
  • the reflector arrangement also has a second reflector with a paraboloidal surface, which is arranged in front of the first reflector in the light emission direction.
  • the light source is arranged at a first focal point of the first reflector.
  • a second focal point of the first reflector coincides with a Focus of the second reflector together.
  • the light source is shifted in rotation and translation to the first focal point of the first reflector.
  • the light reflected at the first reflector leaves the reflector at an edge plane facing the light source.
  • a disadvantage of the known headlight is that the light source has to be precisely adjusted. Furthermore, the light source can be seen at an acute viewing angle, so that a bright point can be seen on a lens covering a housing of the headlight. Disadvantageously, the headlight requires a relatively large structural depth.
  • the object of the present invention is to further develop a headlight for vehicles with only one reflector arrangement for deflecting the light in such a way that a predetermined light distribution with a light/dark boundary is generated in a space-saving manner, with the light source not being visible from the outside.
  • the invention in connection with the preamble of patent claim 1 is characterized in that the first reflector is arranged in front of the light source in the main emission direction, the reflector surface of the first reflector being curved with a first opening section arranged opposite to the main emission direction and with a second opening section arranged offset by 90° to the first opening section and pointing in the direction of the second reflector, that the reflector surface of the second reflector has free-form components such that light incident on the reflector surface of the second reflector is reflected in such a way that a light distribution with a predetermined brightness -/dark border is generated.
  • the particular advantage of the headlight according to the invention is that a predetermined light distribution with a light/dark boundary can be generated in a space-saving manner, with a light source being completely shielded from the outside by a first reflector of the reflector arrangement for the observer. Undesirable glare is thus reduced.
  • the light/dark boundary is caused solely by the second reflector.
  • it has a reflector surface with free-form portions, by means of which the desired light distribution can be generated.
  • the free-form portions are formed by faceting, with a plurality of facet elements arranged in the millimeter range preferably being arranged distributed over the paraboloidal surface of the second reflector.
  • the light emitted by the light source is thus scattered by the second reflector, while it is focused by the first reflector.
  • a main axis of the light source runs in the main emission direction of the headlight.
  • the light emitted by the light source is deflected by 90° by means of the first reflector. Another 90° deflection takes place using the second reflector.
  • the first and second focal points of the first reflector run on a straight line inclined to a vertical.
  • the headlight has a low overall depth.
  • a rear edge of the first reflector and/or a rear edge of the second reflector is/are arranged in front of the first focal point of the first reflector in the main emission direction, so that there is sufficient space between the light source and the reflectors. As a result, heat convection can be improved.
  • a front edge of the second reflector is arranged behind a front edge of the first reflector and preferably a rear edge of the second reflector is arranged in front of the rear edge of the first reflector in the main emission direction.
  • the first and second reflectors form a reflector module.
  • the headlight has a number of reflector modules which are arranged one above the other in pairs and are each of identical design. In this way, the illuminance can advantageously be increased with a small installation depth.
  • a plurality of reflector modules arranged in pairs is provided, so that the illuminance can be further increased.
  • the reflector modules are connected to one another in one piece, preferably forming a single metal-coated injection molded part. This reduces the manufacturing costs.
  • the first reflector is curved in the main emission direction and the second reflector is curved in the opposite direction to the main emission direction. This advantageously leads to improved ventilation or increased heat convection around the light source. Temperatures can be kept low because there are no lenses near the light source.
  • the light source can advantageously be operated at an increased power.
  • a headlight according to the invention is preferably used as a working headlight, which is used, for example, for agricultural and construction machinery, snow sleds, and ships and boats.
  • the worklight described below is suitable for reducing glare because a reflector arrangement 1 is provided, which completely shields a light source 2 of the worklight.
  • the headlight has a housing 3 in which reflector modules 4 arranged in pairs one above the other are arranged. In the present worklight, three pairs of reflector modules 4 are arranged horizontally next to one another.
  • the reflector modules 4 are connected to one another in one piece.
  • the reflector modules 4 are formed by a single metal-coated injection molded part.
  • the reflector arrangement 1 thus has a peripheral edge that surrounds the six reflector modules 4 .
  • the reflector modules 4 are each connected to the frame and/or adjacent reflector modules on a top side and a bottom side as well as on upright edge sides.
  • the housing 3 has a front edge 5 which forms an opening which is closed by a transparent cover plate, not shown. Cooling fins (not shown) adjoin the rear of the edge 4 of the housing 3 .
  • the reflector arrangement 1 has a total of six reflector modules 4, the reflector modules 4 being arranged in pairs in the vertical direction.
  • the reflector modules 4 each have a first reflector 6 containing an ellipsoidal reflector surface 7 and a second reflector 8 with a paraboloidal reflector surface 9 .
  • the first reflector 6 is arranged in front of the light source 2 in the main emission direction H of the headlight.
  • the light source 2 can be in the form of an LED light source which is mounted on a support element 10 .
  • the support element 10 is preferably designed as a printed circuit board.
  • the light source 2 is preferably designed as a TOP LED light source, which emits light 11 normal to the printed circuit board 10 .
  • a main axis A of the light source 2 thus runs in the main emission direction H.
  • the second reflector 8 is arranged in front of the first reflector 6 in the direction of light emission 12, preferably at a distance a from the first reflector 6.
  • the light source 2 is arranged in a first focal point f 1 of the ellipsoidal reflector surface 7 of the first reflector 6 .
  • a second focal point f 2 of the ellipsoidal surface 7 of the first reflector 6 coincides with the focal point f 3 of the reflector surface 9 of the second reflector 8 .
  • the first reflector 6 essentially serves to focus the light 11 and to shield the light source 2
  • the second reflector 8 serves to scatter the light 11 according to a predetermined light distribution 16 with a light/dark boundary 17 .
  • the reflector surface 9 of the second reflector 8 has free-form portions, so that the specified light distribution 16 with the light/dark boundary 17 is generated.
  • the free-form portions are formed by faceting 18 .
  • the second reflector 8 has a faceting 18 with a plurality of facet elements 19 which are distributed over the surface of the paraboloidal base area 9 of the second reflector 8. These facet elements 19 have a dimension in the millimeter range and cause light shaping to generate the specified light distribution 16.
  • the curved first reflector 6 has a first opening section 22 arranged counter to the main emission direction H of the headlight and an opening section 23 arranged offset by 90° to the first opening section 22 and pointing in the direction of the second reflector 8 .
  • the second reflector 8 has a curvature so that an opening thereof points in the main emission direction H of the headlight.
  • the first reflector 6 has a rear edge 24 and the second reflector 8 has a rear edge 25, each of which has the same or an in figure 2 shown do not run in the same vertical plane V H1 or V H2 , the vertical planes V H1 and V H2 being arranged in the main emission direction H in front of the first focal point f 1 of the first reflector 6 .
  • the rear edge 25 of the second reflector 8 is arranged in the main emission direction H in front of the rear edge 24 of the first reflector 6 in the present exemplary embodiment. Both the first reflector 6 and the second reflector 8 are thus arranged at a distance from the light source 2 in the main emission direction H. In this way, improved ventilation in the area of light source 2 and thus improved heat convection can take place.
  • first focal point f 1 and the second focal point f 2 of the first reflector 6 are arranged on a straight line g inclined to a vertical plane V.
  • the straight line g is thus arranged inclined backwards from the vertical plane V by the acute angle ⁇ .
  • a front edge 20 of the second reflector is arranged behind a front edge 21 of the first reflector 6 in the main emission direction H, so that the overall depth is determined by the first reflector 6 .
  • the light/dark boundary 17 is arranged symmetrically to a vertical V.
  • the number of reflector modules 4 can vary.
  • the headlight can also only have a single pair of reflector modules 4 or a single reflector module 4 .

Landscapes

  • 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)
  • Breeding Of Plants And Reproduction By Means Of Culturing (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Claims (15)

  1. Phare pour véhicules
    - avec une source de lumière (2),
    - avec un agencement de réflecteurs (1) comprenant au moins un module de réflecteur (4)
    - avec un premier réflecteur (6) qui dispose d'une surface de réflecteur (7) qui présente un premier foyer (f1) et un deuxième foyer (f2), la source de lumière (2) étant agencée dans le premier foyer (f1), et
    - avec un deuxième réflecteur (8) qui dispose d'une surface de réflecteur (9) qui présente un foyer (f3) coïncidant avec le deuxième foyer (f2) du premier réflecteur (6), caractérisé
    - en ce que le premier réflecteur (6) est agencé devant la source de lumière (2) dans la direction principale de rayonnement (H), la surface de réflecteur (7) du premier réflecteur (6) étant réalisée sous forme bombée avec une première section d'ouverture (22) agencée à l'opposé de la direction principale de rayonnement (H) et avec une deuxième section d'ouverture (23) agencée avec un décalage de 90° par rapport à la première section d'ouverture (22) et orientée en direction du deuxième réflecteur (8),
    - en ce que la surface de réflecteur (9) du deuxième réflecteur (8) présente des parties de forme libre (18), de telle sorte que la lumière (11) qui arrive sur la surface de réflecteur (9) du deuxième réflecteur (8) est réfléchie de telle sorte qu'une répartition de lumière (16) est produite avec une limite de clair-obscur (17) prédéfinie, la limite de clair-obscur étant provoquée uniquement par le deuxième réflecteur.
  2. Phare selon la revendication 1, caractérisé en ce que les parties de forme libre du deuxième réflecteur (8) sont formées par un facettage (18).
  3. Phare selon la revendication 1 ou 2, caractérisé en ce que la surface de réflecteur (7) du premier réflecteur (6) est réalisée sous forme ellipsoïdale et la surface de réflecteur (9) du deuxième réflecteur (8) est réalisée sous forme paraboloïdale,
  4. Phare selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la source de lumière (2) est agencée de telle sorte qu'un axe principal (A) de la source de lumière (2) est dirigé dans la direction principale de rayonnement (H) du phare et qu'un bord arrière (24) du premier réflecteur (6) et/ou un bord arrière (25) du deuxième réflecteur (8) s'étendent dans un plan vertical (VH1, VH2) qui est agencé avant le premier point focal (f1) du premier réflecteur (6) dans la direction principale de rayonnement (H).
  5. Phare selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le premier foyer et le deuxième foyer du premier réflecteur (6) sont agencés sur une droite (g) inclinée par rapport à une verticale (V).
  6. Phare selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'à l'état monté du phare dans un véhicule, le deuxième foyer du premier réflecteur (6) est agencé en dessous du premier foyer du premier réflecteur (6) et décalé par rapport à celui-ci dans la direction principale de rayonnement (H).
  7. Phare selon la revendication 5, caractérisé en ce que la droite (g) forme avec la verticale (V) un angle (ϕ) dans la plage allant de 30° à 70°.
  8. Phare selon l'une quelconque des revendications 1 à 7, caractérisé en ce que le deuxième réflecteur (8) est bombé dans la direction principale de rayonnement (H) de telle sorte qu'un bord avant (20) du deuxième réflecteur (8) est agencé derrière un bord avant (21) du premier réflecteur (6) dans la direction principale de rayonnement (H) et/ou que le bord arrière (25) du deuxième réflecteur (8) est agencé devant le bord arrière (24) du premier réflecteur (6) dans la direction principale de rayonnement (H).
  9. Phare selon l'une quelconque des revendications 1 à 8, caractérisé en ce qu'un certain nombre de modules de réflecteur (4) sont agencés les uns aux dessus des autres par paires, les modules de réflecteur (4) étant chacun réalisés de manière identique.
  10. Phare selon l'une quelconque des revendications 1 à 9, caractérisé en ce qu'une pluralité de modules de réflecteur (4) sont reliés entre eux d'un seul tenant.
  11. Phare selon l'une quelconque des revendications 1 à 10, caractérisé en ce qu'au moins un module de réflecteur (4) est formé par une seule pièce moulée par injection revêtue de métal.
  12. Phare selon l'une quelconque des revendications 1 à 11, caractérisé en ce que le premier réflecteur (6) et le deuxième réflecteur (8) sont agencés à distance d'un élément support (10) portant la source de lumière (2).
  13. Phare selon l'une quelconque des revendications 1 à 12, caractérisé en ce que l'ensemble de réflecteurs (1) est enchâssé dans un boîtier (3) qui dispose sur le côté extérieur de nervures de refroidissement.
  14. Phare selon l'une quelconque des revendications 1 à 13, caractérisé en ce que le premier réflecteur (6) est réalisé de telle sorte que la lumière (11) réfléchie sur le premier réflecteur (6) quitte celui-ci en direction d'un plan de bord latéral (13) s'étendant perpendiculairement à l'axe principal (A) de la source de lumière (2).
  15. Phare selon l'une quelconque des revendications 1 à 14, caractérisé en ce que le deuxième réflecteur (8) est agencé à une distance (a) du premier réflecteur (6).
EP20800796.3A 2019-10-29 2020-10-15 Phare pour véhicules Active EP3966495B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019129100.3A DE102019129100A1 (de) 2019-10-29 2019-10-29 Scheinwerfer für Fahrzeuge
PCT/EP2020/078990 WO2021083672A1 (fr) 2019-10-29 2020-10-15 Phare pour véhicules

Publications (2)

Publication Number Publication Date
EP3966495A1 EP3966495A1 (fr) 2022-03-16
EP3966495B1 true EP3966495B1 (fr) 2023-03-22

Family

ID=73059817

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20800796.3A Active EP3966495B1 (fr) 2019-10-29 2020-10-15 Phare pour véhicules

Country Status (9)

Country Link
US (1) US11572997B2 (fr)
EP (1) EP3966495B1 (fr)
AU (1) AU2020374239B2 (fr)
CA (1) CA3111958C (fr)
DE (1) DE102019129100A1 (fr)
FI (1) FI3966495T3 (fr)
PT (1) PT3966495T (fr)
WO (1) WO2021083672A1 (fr)
ZA (1) ZA202104706B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3118120B1 (fr) * 2020-12-18 2023-05-05 Valeo Vison Service Ip Projecteur automobile avec plusieurs modules d’éclairage sur une platine commune inclinée.
USD1010169S1 (en) * 2021-01-18 2024-01-02 Arb Corporation Limited Driving light
EP4357666A1 (fr) * 2022-10-21 2024-04-24 Hella Autotechnik Nova, s.r.o. Lampe d'automobile
CN118257981A (zh) * 2022-12-27 2024-06-28 法雷奥照明公司 照明模块、灯装置以及车辆

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4123338B2 (ja) 2002-02-01 2008-07-23 スタンレー電気株式会社 灯具
DE102010033707A1 (de) * 2010-08-06 2012-02-09 Hella Kgaa Hueck & Co. Optikanordnung für einen Scheinwerfer eines Fahrzeugs
AT519119B1 (de) 2016-11-22 2018-04-15 Zkw Group Gmbh Beleuchtungseinrichtung eines kraftfahrzeugscheinwerfers
DE102016125676A1 (de) * 2016-12-23 2018-06-28 Automotive Lighting Reutlingen Gmbh LED-Modul und Beleuchtungseinrichtung für ein Kraftfahrzeug mit mehreren solcher LED-Module
US11162660B2 (en) * 2017-10-10 2021-11-02 Nordic Lights Ltd. Working light
FR3077367B1 (fr) * 2018-01-31 2021-04-16 Valeo Vision Module lumineux bi-fonction avec surface eclairee commune
DE102018201980A1 (de) 2018-02-08 2019-08-08 Bayerische Motoren Werke Aktiengesellschaft Beleuchtungsvorrichtung für ein Kraftfahrzeug
JP7171413B2 (ja) * 2018-12-18 2022-11-15 スタンレー電気株式会社 車両用灯具
JP7265922B2 (ja) * 2019-04-22 2023-04-27 スタンレー電気株式会社 車両用前照灯

Also Published As

Publication number Publication date
CA3111958C (fr) 2022-07-12
EP3966495A1 (fr) 2022-03-16
DE102019129100A1 (de) 2021-04-29
ZA202104706B (en) 2021-09-29
PT3966495T (pt) 2023-04-10
AU2020374239B2 (en) 2021-09-30
AU2020374239A1 (en) 2021-05-27
US11572997B2 (en) 2023-02-07
US20220268414A1 (en) 2022-08-25
WO2021083672A1 (fr) 2021-05-06
CA3111958A1 (fr) 2021-04-29
FI3966495T3 (fi) 2023-06-21

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