EP2754950B1 - Beleuchtungstaschenlampe für Kraftfahrzeug - Google Patents

Beleuchtungstaschenlampe für Kraftfahrzeug Download PDF

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Publication number
EP2754950B1
EP2754950B1 EP14151123.8A EP14151123A EP2754950B1 EP 2754950 B1 EP2754950 B1 EP 2754950B1 EP 14151123 A EP14151123 A EP 14151123A EP 2754950 B1 EP2754950 B1 EP 2754950B1
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EP
European Patent Office
Prior art keywords
axis
lens
spotlight
light
along
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Active
Application number
EP14151123.8A
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English (en)
French (fr)
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EP2754950A1 (de
Inventor
Cyril Rivier
Hassan Koulouh
Alexandre Aubry
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.)
AML Systems SAS
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AML Systems SAS
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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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • 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

Definitions

  • the field of the invention is that of headlights for motor vehicles.
  • a headlight generally comprises a light source producing a light beam and means for moving and / or deforming the light beam to adapt it to the circumstances of driving.
  • the invention relates more particularly to headlamps of the lighting torch type capable of continuously directing the light beam produced, in addition to the usual main beam headlamps, towards an identified object present on, or in the vicinity of, the path of the vehicle. .
  • Driving assistance systems which make it possible to detect a potential obstacle, for example a pedestrian or an animal, on the road.
  • These systems which are useful in a dark environment, for example at night or in a tunnel, generally comprise a sensor, of the infrared camera type, which detects the presence of such an obstacle.
  • a light source is then controlled to illuminate the obstacle and an actuator sets the entire lighting torch in motion so that the beam follows the obstacle.
  • the light source must move quickly so that the obstacle remains illuminated and it is therefore necessary to have an actuator capable of setting the torch in motion. accurately and quickly.
  • Such actuators are however complex and bulky.
  • a torch which comprises the features of the preamble of claim 1 is for example known from document WO 2012/098142 A1 .
  • the invention thus aims to improve the situation by proposing a lighting torch for a motor vehicle comprising a light source producing a light beam directed along a first axis intended to be oriented towards the front of the vehicle, said torch comprising a lens, such as that said light source projects the entire beam directly onto the lens, without reflection or obstruction, said lens being arranged to move in rotation about a second axis intended to be oriented towards the top of the vehicle.
  • said light beam is of substantially elongated shape along the second axis.
  • the deformation of a beam which is due to the displacement of the lens is greater at the level of the upper end of the beam than at the level of the lateral ends which remain little modified.
  • the lateral amplitude of the beam is thus little modified by the rotation of the lens and the torch of the invention therefore makes it possible to aim precisely at the objects located on the edge of the road without the deformations of the beam causing problems.
  • the light beam is projected directly onto the lens and is never reflected on its path between the light source and the lens.
  • the light torch therefore does not include an optical element between the light source and the lens and the invention thus makes it possible to obtain a simplified lighting torch.
  • the lens needs to be moved to rotate the beam. Rotation around the vertical axis moves the light beam so that it continuously illuminates a particular object, for example an obstacle on the road, both when the vehicle is stationary and when it is moving . Since the mass of the lens is lower than that of the entire lighting torch, it will be possible to use a more compact actuation system and / or to move the lens more rapidly.
  • the slight deformation of the beam directed by the lens is not a problem here because the light / dark border must not comply with the same rules as those existing for elliptical headlamps intended to illuminate the road.
  • the verticality of the beam makes it possible to illuminate any obstacle by performing only one rotation around a vertical axis.
  • the torch is thus capable of illuminating objects both near and far from the vehicle, or of following the evolution of the obstacle with respect to the vehicle by rotating around a single axis of rotation.
  • the light beam is projected by the lens and capable of forming an image inscribed in a rectangle in a plane perpendicular to the first axis, the long sides of the rectangle extending along the second axis and the small sides of the rectangle extending along a third axis perpendicular to the first axis and to the second axis.
  • a verticality of the beam is obtained making it possible to target objects near and far from the vehicle by performing a rotation about a single axis of rotation, that is to say the second axis.
  • inscribed in a rectangle is meant a shape, preferably convex, which comes tangent to the four sides of said rectangle.
  • the length of the long sides is 2 to 10 times greater than the length of the short sides, in particular 4 to 6 times greater.
  • the light beam is projected by the lens and capable of forming an image projected at a given length of the lighting torch measured along the first axis, the image then having a width measured along a third perpendicular axis to the first axis and to the second axis which is between 1 and 5% of said length.
  • the light source comprises at least one light-emitting diode.
  • Light emitting diodes are particularly advantageous because they are point light sources.
  • the light source comprises a series of light-emitting diodes, arranged linearly along the second axis. These diodes are oriented in the direction of the optical axis of the lens when the latter is in its rest position.
  • the lighting torch comprises a lighting module on which the light source is positioned.
  • the lens is mounted on the lighting module by means of at least one connection allowing rotation of the lens relative to the lighting module along the second axis.
  • said lighting torch comprises an actuator arranged to rotate said lens around the second axis.
  • the actuator can be chosen to be more compact and less heavy in order to rotate only the lens.
  • the invention also relates to a headlight for a motor vehicle comprising a lighting torch as defined above.
  • the invention finally relates to a motor vehicle comprising a lighting torch as defined above.
  • the figures 1 , 2 , 3a and 3b show an embodiment of the lighting torch 2 for a motor vehicle according to the invention.
  • the torch 2 comprises a light source 4, here a light emitting diode, and a lens 6 mounted on a lens support 7 arranged on a lighting module 8.
  • the lighting module comprises a base 9, on which the lens support 7 is mounted, and a body 10 on which the light source is mounted.
  • the light rays from the light source 4 are emitted directly towards the lens 6 to form a light beam of very high intensity and long range. It is noted here that the beam is neither deflected nor obstructed in its path between the light source 4 and the lens 6. In other words, the whole of the light beam emitted by the light source 4, that is to say the all of the light energy emitted by the source, except for parasitic losses, is projected directly onto lens 6.
  • the light-emitting diode is arranged on a printed circuit board 5, located here on the body 10 of the lighting module.
  • the light beam produced by this light-emitting diode is directed along a first axis X oriented towards the front of the vehicle in order to optimally illuminate any obstacle on or next to the road taken by the vehicle.
  • Orientation towards the front of the vehicle is understood to mean any direction starting from a plane perpendicular to a longitudinal axis of the vehicle and heading towards the front of the vehicle.
  • the torch 2 is intended for use in a dark environment, for example at night or in a tunnel, to illuminate a potential moving obstacle on the road or at the edge of this road.
  • This obstacle is, for example, a pedestrian or an animal which may, for example, be about to cross the road or already in the process of crossing it.
  • the lens 6 is arranged to rotate about a second axis Z oriented towards the top of the vehicle.
  • the second axis is in particular vertical and in particular perpendicular to the first axis.
  • the beam can then be directed on either side of the road.
  • the light beam is also elongated along the second Z axis, so that the torch 2 can illuminate obstacles located laterally, near or far from the vehicle by rotating the lens only along one axis, namely the second Z axis.
  • the light source here comprises a series of light-emitting diodes, arranged linearly along the second vertical axis Z; they are oriented in the direction of the optical axis of the lens 6.
  • the optical axis 6 is defined here when the lens is in the rest position, that is to say when it has not rotated for illuminate an obstacle. The optical axis is then aligned with the light source.
  • light beam elongated along the second Z axis we mean an elongated beam so that the image of the beam projected onto a plane perpendicular to the first X axis and located in front of the torch is inscribed in a vertical rectangle, that is to say - say elongated along the second Z axis.
  • the vertical rectangle comprises long sides, measured along the second Z axis, 2 to 10 times larger than the short sides of the rectangle measured along a third Y axis, in particular perpendicular to the first axis X and the second Z axis.
  • the illumination could be 2 to 20 m high.
  • a rectangle will preferably be chosen, the length of the long sides of which is much greater than that of the short sides, for example ten times greater, in the case where it is desired that the distance between the vehicle carrying the lighting torch of the invention and the first point of impact on the ground of the beam is weak while illuminating an obstacle, either at short or at long distance, from the lighting torch.
  • the torch of the invention is particularly advantageous in the case where the driver can visualize a line on the ground indicating the direction of the obstacle to be avoided.
  • the image of the beam projected by the lens has a width of between 1 to 5%, that is to say that the image of the beam projected by the lens on a wall located 100 meters from the torch has a width of 1 meter to 5 meters on the wall.
  • the lens support 7 is mounted to rotate freely on the lighting module 8 between two connections 11, 12.
  • the torch of the invention thus has a first rotary connection 11 between the lens support 7 and the lighting module 8, which is located above the lens along the second Z axis and a second rotary link 12 between the lens support 7 and the lighting module 8, which is located below the lens along the second Z axis.
  • the first link 11, the second link 12 and the optical axis of the lens 6 are aligned along the second Z axis.
  • the third Y axis in particular perpendicular to the first X axis and to the second Z axis, defines, with the X axis, the horizontal.
  • the first link 11 is formed here of a protuberance 13 of the lighting module 8 and a pin 14 of the lens support 7 inserted in the protuberance 13.
  • the second connection 12 is formed in particular of a pin of the lens support 7 and of an orifice located on the base 9 of the lighting module 8.
  • the pin of the first link 11 and that of the second link 12 are aligned along the second axis Z and thus allow the lens 6 to rotate around this axis.
  • the figures 1 and 2 represent the case where the lens is centered relative to the torch, that is to say the case where the beam exiting the lens is directed straight in front of the vehicle.
  • the figures 3a and 3b represent the cases in which the actuator has moved the lens 6 in rotation, in particular to follow an obstacle. In such a case, the beam is slightly distorted, but the stray light which results from it and which develops mainly at its upper and lower ends, does not pose a problem here since it cannot dazzle the passengers of vehicles traveling in the direction reverse.
  • the torch 2 of the invention can be controlled by a driving assistance system.
  • a driving assistance system comprises image detection means comprising at least one sensor which collects information relating to the environment in which the vehicle is moving.
  • This sensor is in particular an infrared camera directed in the direction of movement of the vehicle to cover a distance which may range up to several hundred meters in front of the vehicle.
  • the detection means output at least one signal comprising data of the detected image to image processing means.
  • the image processing means here comprise a real-time video processor arranged to rapidly process, for example in less than a tenth of a second, the image data collected by the detection means.
  • This processor is also able to identify different types of objects on the road, to discriminate between stationary objects and moving objects and to calculate the trajectories of the latter.
  • the image processing means identify an obstacle, such as an animal or a pedestrian, moving on the road or in the vicinity of the road, they calculate its trajectory and supply its position in real time to means of control of the actuator assembly of the torch 2 in order to position the light beam produced by the source 4 in an appropriate manner to illuminate the obstacle.
  • an obstacle such as an animal or a pedestrian
  • control means control the motor of the actuator assembly to drive the lens 6 in rotation.
  • the torch of the invention can form a separate projector in its own right, in particular dedicated to the pursuit of obstacles. It can also be part of an existing headlight, in particular a fog light.

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)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Claims (11)

  1. Beleuchtungstaschenlampe (2) für Kraftfahrzeug, die eine Lichtquelle (4) umfasst, die einen Lichtstrahl erzeugt, der entlang einer ersten Achse (X) ausgerichtet ist, der dazu bestimmt ist, zu der Vorderseite des Fahrzeugs gerichtet zu sein, wobei die Taschenlampe eine Linse (6) derart umfasst, dass die Lichtquelle (4) den gesamten Strahl direkt auf die Linse (6) ohne Reflexion und ohne Verschluss projiziert, wobei die Linse (6) eingerichtet ist, um sich in Drehung um eine zweite Achse (Z) zu verlagern, die dazu bestimmt ist, zu der Oberseite des Fahrzeugs gerichtet zu sein, durch die Tatsache gekennzeichnet, dass der Lichtstrahl eine im Wesentlichen längliche Form entlang der zweiten Achse (Z) aufweist.
  2. Beleuchtungstaschenlampe (2) nach Anspruch 1, wobei der Lichtstrahl von der Linse (6) projiziert wird und geeignet ist, ein Bild zu bilden, das in ein Rechteck in einer Ebene senkrecht zu der ersten Achse (X) fällt, wobei sich die großen Seiten des Rechtecks entlang der zweiten Achse (Z) erstrecken, und sich die kleinen Seiten des Rechtecks entlang einer dritten Achse (Y) senkrecht zu der ersten Achse (X) und der zweiten Achse (Z) erstrecken.
  3. Beleuchtungstaschenlampe (2) nach Anspruch 2, wobei die Länge der großen Seiten 2 bis 10 Mal größer ist als die Länge der kleinen Seiten.
  4. Beleuchtungstaschenlampe (2) nach einem der vorstehenden Ansprüche, wobei der Lichtstrahl von der Linse (6) projiziert wird und geeignet ist, ein Bild zu bilden, das in eine gegebene Länge der Beleuchtungstaschenlampe (2), die entlang der ersten Achse (X) gemessen wird, projiziert wird, wobei das Bild eine Breite entlang einer dritten Achse (Y) senkrecht zu der ersten Achse (X) und der zweiten Achse (Z) gemessen aufweist, die zwischen 1 und 5 % der Länge liegt.
  5. Beleuchtungstaschenlampe (2) nach einem der vorstehenden Ansprüche, wobei die Lichtquelle (4) mindestens eine Licht emittierende Diode umfasst.
  6. Beleuchtungstaschenlampe (2) nach Anspruch 5, wobei die Lichtquelle (4) eine Reihe Licht emittierender Dioden umfasst, die linear entlang der zweiten Achse (Z) angeordnet sind.
  7. Beleuchtungstaschenlampe (2) nach einem der vorstehenden Ansprüche, die ein Beleuchtungsmodul (8) umfasst, auf dem die Lichtquelle (4) positioniert ist.
  8. Beleuchtungstaschenlampe (2) nach Anspruch 7, wobei die Linse (6) auf das Beleuchtungsmodul (8) über mindestens eine Verbindung (11, 12) montiert ist, die die Drehung der Linse (6) in Bezug auf das Beleuchtungsmodul (8) entlang der zweiten Achse Z gestattet.
  9. Beleuchtungstaschenlampe (2) nach einem der vorstehenden Ansprüche, die einen Aktuator umfasst, der eingerichtet ist, um die Linse (6) um die zweite Achse (Z) drehen zu lassen.
  10. Scheinwerfer für Kraftfahrzeug, der eine Beleuchtungstaschenlampe (2) nach einem der vorstehenden Ansprüche umfasst.
  11. Kraftfahrzeug, das eine Beleuchtungstaschenlampe (2) nach einem der Ansprüche 1 bis 9 umfasst.
EP14151123.8A 2013-01-14 2014-01-14 Beleuchtungstaschenlampe für Kraftfahrzeug Active EP2754950B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1350286A FR3001028B1 (fr) 2013-01-14 2013-01-14 Torche d'eclairage pour vehicule automobile

Publications (2)

Publication Number Publication Date
EP2754950A1 EP2754950A1 (de) 2014-07-16
EP2754950B1 true EP2754950B1 (de) 2020-11-04

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US (1) US9657911B2 (de)
EP (1) EP2754950B1 (de)
JP (1) JP6300530B2 (de)
CN (1) CN103925541B (de)
FR (1) FR3001028B1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3001028B1 (fr) * 2013-01-14 2018-05-04 Aml Systems Torche d'eclairage pour vehicule automobile
US10086751B2 (en) * 2016-06-24 2018-10-02 Ford Global Technologies, Llc Vehicle lighting system having a spotlight
EP3431864B1 (de) * 2017-07-20 2023-01-11 Marelli Automotive Lighting Italy S.p.A. Beleuchtungsvorrichtung für fahrzeuge mit drehenden beleuchtungsmodulen
CN107830491A (zh) * 2017-10-24 2018-03-23 郴州智上光电科技有限公司 一种增加led汽车灯的光通量利用率的方法及led汽车灯
FR3073179B1 (fr) * 2017-11-08 2021-05-28 Psa Automobiles Sa Dispositif d’eclairage a faisceau principal et faisceau etroit orientable en fonction de la position d’un obstacle detecte devant un vehicule
JP7414519B2 (ja) * 2019-12-25 2024-01-16 株式会社小糸製作所 路面描画装置及び車両

Citations (1)

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Publication number Priority date Publication date Assignee Title
JP2008218310A (ja) * 2007-03-07 2008-09-18 Stanley Electric Co Ltd 視線誘導用照明装置

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Publication number Priority date Publication date Assignee Title
JPS62222505A (ja) * 1986-03-25 1987-09-30 市光工業株式会社 プロジエクタ型の前照灯
AT409745B (de) * 2001-02-21 2002-10-25 Zizala Lichtsysteme Gmbh Fahrzeugscheinwerfer
JP4008359B2 (ja) * 2003-01-16 2007-11-14 株式会社小糸製作所 車両用前照灯
JP2008257959A (ja) * 2007-04-03 2008-10-23 Koito Mfg Co Ltd 車両用灯具
DE202007018181U1 (de) * 2007-12-31 2008-05-08 Automotive Lighting Reutlingen Gmbh Projektionsmodul mit dynamischer Kurvenlichtfunktion
JP2010092747A (ja) * 2008-10-09 2010-04-22 Koito Mfg Co Ltd 車両用前照灯
FR2973861B1 (fr) * 2011-01-20 2018-11-09 Valeo Vision Module de projection d'un faisceau
FR3001028B1 (fr) * 2013-01-14 2018-05-04 Aml Systems Torche d'eclairage pour vehicule automobile

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008218310A (ja) * 2007-03-07 2008-09-18 Stanley Electric Co Ltd 視線誘導用照明装置

Also Published As

Publication number Publication date
US20140198514A1 (en) 2014-07-17
US9657911B2 (en) 2017-05-23
JP6300530B2 (ja) 2018-03-28
EP2754950A1 (de) 2014-07-16
CN103925541B (zh) 2019-09-20
JP2014135281A (ja) 2014-07-24
CN103925541A (zh) 2014-07-16
FR3001028B1 (fr) 2018-05-04
FR3001028A1 (fr) 2014-07-18

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