EP3212996B1 - Semielliptischer projektor mit einem kühler - Google Patents

Semielliptischer projektor mit einem kühler Download PDF

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Publication number
EP3212996B1
EP3212996B1 EP15793880.4A EP15793880A EP3212996B1 EP 3212996 B1 EP3212996 B1 EP 3212996B1 EP 15793880 A EP15793880 A EP 15793880A EP 3212996 B1 EP3212996 B1 EP 3212996B1
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EP
European Patent Office
Prior art keywords
radiator
projector
ellipsoid
optical element
reflector
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Active
Application number
EP15793880.4A
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English (en)
French (fr)
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EP3212996A1 (de
Inventor
Hassan Koulouh
Cyril Rivier
Alexandre Aubry
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AML Systems SAS
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AML Systems SAS
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Publication of EP3212996A1 publication Critical patent/EP3212996A1/de
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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
    • 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
    • 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]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled 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
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/331—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas
    • F21S41/332—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas with continuity at the junction between adjacent areas
    • 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
    • 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
    • F21S41/68—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens
    • F21S41/683—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens by moving screens

Definitions

  • the field of the present invention is that of automobile equipment and, more particularly, that of light projectors for these motor vehicles.
  • Motor vehicle headlamps generally comprise a lens and a reflector in which a light source is arranged. It is known to use a cut-off bar allowing various phases of occultation of the light beam. The strip is then electrically actuated by a motor to move, on command, between at least two angular positions in which it more or less obscures the light beam. This makes it possible to limit the range of the headlamp, for example to that of dipped beam headlights, called low beam position, so as not to dazzle drivers traveling in the opposite direction, or even to that of main beam headlights, called high beam position, in which it does not there is no concealment. This technology is commonly used with headlamps comprising a high-power light source, such as halogen or xenon lamp headlamps, for which the loss of light output due to the interception of the flux by the bar is not really detrimental .
  • a high-power light source such as halogen or xenon lamp headlamps
  • the heat given off by the light source and by the solar rays which enter the optical module via the lens leads to the heating of the interior environment of the optical module and therefore of the motor.
  • This heating phenomenon is notably defined by a so-called environmental temperature.
  • the motor is required to dissipate a lot of power during operation, which leads to significant self-heating of the motor.
  • This self-heating phenomenon is notably defined by a so-called self-heating temperature.
  • the temperature reached by the motor that is to say the sum of the environmental and self-heating temperatures, is therefore high, which risks damaging the plastic casing on which the motor is mounted.
  • the invention aims to remedy these drawbacks.
  • the subject of the invention is a headlamp for a motor vehicle comprising a light source, a moving means and a mobile optical element configured to be driven by said moving means and arranged to cut and/or reflect a light beam emitted by the source, is remarkable in that it comprises a radiator thermally connected to said means of setting in motion.
  • the diffusion of the heat from the means of setting in motion is optimized and it is possible to do without both an electronic card and an expensive metal casing.
  • the headlamp comprises a reflector, said light beam being reflected by the reflector before being cut off and/or reflected by the mobile optical element.
  • the light source comprises at least one light-emitting diode, called LED diode.
  • the radiator is configured to dissipate the heat generated by the LED diode or diodes.
  • the invention thus makes it possible to use a single radiator to dissipate the heat from the moving means and that from the light source.
  • said reflector has the shape of a half-ellipsoid portion extending above a plane of symmetry of said ellipsoid, said source being positioned on the axis of symmetry of the ellipsoid.
  • the radiator is positioned below the plane of symmetry of said ellipsoid.
  • the radiator is positioned upstream of the movable optical element in the direction of emission of said light beam.
  • said radiator is located at least partly inside said ellipsoid.
  • the radiator is located between a bottom of the reflector and said mobile optical element.
  • said projector comprises an optical lens, said radiator being positioned at least partly in a volume defined by the cylindrical extension along an optical axis of the lens from a peripheral contour of the lens to a transverse plane passing through the bottom of the reflector.
  • the radiator is located, at least in part, inside a volume defined by a second half-ellipsoid portion, symmetrical to the first half-ellipsoid portion and forming with it said ellipsoid portion .
  • the moving means is located in the same zone of the headlamp as the radiator.
  • the invention thus makes it possible to improve the cooling of the moving means thanks to the radiator while optimizing the size of the headlamp.
  • the moving means is located upstream of the movable optical element in the direction of emission of said light beam.
  • the moving means is therefore protected from the rays of the sun penetrating into the projector through the lens.
  • said moving means is located below the plane of symmetry of said ellipsoid.
  • said moving means is located at least partly inside said ellipsoid.
  • said moving means is located below said light source.
  • the moving means is located between a bottom of the reflector and said mobile optical element.
  • said projector comprises an optical lens, said moving means being positioned at least partly in a volume defined by the extension of a peripheral contour of the lens as far as a bottom of the reflector parallel to an optical axis of The lens.
  • a semi-elliptical headlight 1 of a motor vehicle comprising a reflector 12, having the shape of a first half-ellipsoid portion extending above a plane of symmetry of the ellipsoid.
  • the headlamp also comprises a light source S comprising a light-emitting diode, called LED diode, positioned inside the reflector.
  • the light source here comprises a plurality of LED diodes.
  • a second portion of half-ellipsoid 15 forming a portion of ellipsoid with the first portion of half-ellipsoid 14 is shown in dotted lines for the purpose of understanding but does not represent an actual physical element of the half-elliptical headlamp.
  • the second half-ellipsoid portion 15 is symmetrical with respect to the first half-ellipsoid portion 14 according to the plane of symmetry of the ellipsoid.
  • the first half-ellipsoid portion is limited axially by a plane M perpendicular to the axis of symmetry of the ellipsoid and intersecting the ellipsoid.
  • the light source S is positioned on an axis of symmetry X of the ellipsoid portion, at a first focal point of the first half-ellipsoid portion, on the bottom side of the reflector 12, the light source emitting only on a solid angle of 2 ⁇ steradians, or, in section along a vertical plane passing through the optical axis, as shown in the figure, on a sector of 180° directed upwards.
  • This configuration is particularly well suited to a light source formed by light-emitting diodes LED, which only emit over a solid angle of 2 ⁇ steradians.
  • the axis of symmetry X of the ellipsoid is a longitudinal axis of symmetry of the ellipsoid.
  • the plane of symmetry of the ellipsoid contains the axis of symmetry X of the ellipsoid.
  • the luminous flux is directed, after reflection on the reflector 12 towards the second focus F of the ellipsoid then towards a converging lens 3 of the projector 1 located downstream of the reflector in the direction of emission of the luminous flux and whose purpose is to project the luminous flux onto the road. Due to this emission over 2 ⁇ steradians, the light beam is directed only towards the lower half of the lens 3.
  • a mobile optical element 4 arranged to cut and/or reflect the light beam emitted by the source and reflected by the reflector is positioned at the level of the second focus F.
  • This is a mirror 4 here. embodiment of the invention not shown, it could be a cut-off bar.
  • the reflective surface of mirror 4 is directed upwards so as to be able to intercept the luminous flux coming from reflector 12.
  • This mirror 4 is movable around a horizontal axis so as to position its reflective surface, either in a horizontal plane passing by or parallel to the axis of symmetry of the ellipsoid X, or, in a plane inclined forwards, in a so-called retracted position.
  • the mirror 4 is inclined with respect to the horizontal plane and is positioned outside the luminous flux, thus allowing all the rays to pass in the direction of the lens 3. These pass through the lower part of the lens and are straightened upwards to illuminate the road over a long distance. We thus find us in the road position without loss of the light power emitted by the source S.
  • the mirror 4 is in a horizontal position and its longitudinal span is sufficient to intercept all the rays coming from the reflector 12. All these rays are reflected upwards by the mirror 4 and are redirected by the latter towards the upper part of the lens 3. At the exit of the lens, the light rays are sent forwards, but with a downward inflection, which illuminates the road over a given distance. We then find us in a code position, this time again, without losing the light power emitted by the source S.
  • the shape of the beam to meet the requirements of the European code standards is given either by a particular shape of the lens 3, or by an axial offset of the focus of the lens with respect to the second focus F of the ellipsoid, or finally by a combination of the two.
  • the light source S remains on, the beam it emits being directed either substantially horizontally in the main beam position, when the mirror 4 is in a first position, is directed downwards in the dipped beam position, when the mirror 4 is in a second position.
  • the operation of the light source is thus improved, in particular when it is produced by light-emitting diodes LED, since it does not go through successive phases of switching on and off.
  • the projector 1 comprises at least one means of movement 20 configured to make mobile the mobile optical element 4.
  • the means of movement 20 is for example an actuator, a solenoid, a coil or as here an electric motor. It comprises here a motor shaft at the end of which is positioned a pinion 21 which rotates the mobile optical element 4 via a toothed sector 22.
  • the headlight 1 comprises a radiator 30 configured to dissipate the heat from the moving means 20.
  • the radiator comprises fins 31.
  • the fins 31 extend parallel to one another and perpendicular to the axis of symmetry X of the ellipsoid.
  • the radiator 30 is in contact with an armature of the moving means. It is designed to increase the exchange surface with the air.
  • the radiator allows the electric motor to admit in its turns a current density of up to 6A/mm 2 and to dissipate this current in an environment of 130° to 160°C without exceeding the critical temperature of the turns, which is around 220°C.
  • the radiator is located closest to the light source S and in particular upstream of the mobile optical element 4 in the direction 40 of emission of the light beam.
  • the direction 40 of emission of the light beam is the direction by which it leaves the headlight with the aim of being projected onto the road.
  • upstream means that the radiator is located upstream of a plane P perpendicular to the axis of symmetry X of the ellipsoid, the plane P itself being located upstream of the mobile optical element 4 .
  • the radiator 30 is located below the plane of symmetry of the ellipsoid, for example at least partly inside the second half-ellipsoid portion shown in dotted lines, that is to say inside the ellipsoid portion.
  • the radiator 30 is positioned at least partly in a cylindrical volume V resting along the optical axis of the lens 3, on the peripheral contour 18 of the lens 3, and extending to the bottom 13 of the reflector 12 as illustrated on the figures 1 and 2 .
  • the peripheral contour 18 of the lens 3 is, in particular, circular.
  • the moving means 20 is advantageously located in the same area of the headlamp as the radiator 30.
  • the movement means 20 is for example located upstream of the mobile optical element 4 in the direction 40 of emission of the light beam.
  • the movement means 20 is located below the plane of symmetry of the ellipsoid, for example at least partly inside the second half-ellipsoid portion shown in dotted lines, that is to say at inside the ellipsoid portion.
  • the invention thus makes it possible to improve the cooling of the moving means while optimizing the size of the projector.
  • the light source emits a light beam only towards the first half-ellipsoid portion, the majority of the heat given off by the light source is not directed towards the setting means.
  • the moving means 20 being cooled by the radiator 30, it is thus possible to position the moving means 20 as close as possible to the light source, without risking that it overheats, and thus improve the projector footprint.
  • the movement means 20 can therefore be located below said light source S, that is to say it is crossed by a plane O perpendicular to the axis of symmetry X of the portion of ellipsoid passing by the light source S.
  • the movement means 20 is positioned at least partly in said volume V.
  • the projector of the invention can also comprise several semi-elliptical reflectors 12 as illustrated in the picture 3 . These reflectors 12 are for example positioned next to each other.
  • the fact of positioning the moving means 20 upstream of the mobile optical element 4 is all the more advantageous in this embodiment, because it makes it possible to bring the lens or lenses 3 closer to each of the reflectors without being hindered by the presence of the means of setting in motion.
  • the headlamp comprises a single means 20 for moving the set of reflectors 12, arranged to make the mobile optical elements 4 of each reflector move.
  • the projector comprises, for example, a support 19 on which the moving means 20 is mounted.
  • the assembly can be done by snapping using a metal or plastic flange, welding, screwing to any other means of rigid assembly.
  • the invention has been described with a combination of a plane mirror 4 and a lens 3 which reverses the light rays and which gives the desired shape to the beam. It could just as well be achieved by a single beam reversal member, such as a mirror having a complex shape which returns the light beam forwards, giving it the desired shape.
  • a single beam reversal member such as a mirror having a complex shape which returns the light beam forwards, giving it the desired shape.
  • the passage from the configuration of the main beam to the dipped beam remains, in this case, ensured by a displacement of the mirror with a complex shape, which is thus mobile as is the plane mirror of the configuration described.

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  • 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)

Claims (9)

  1. Scheinwerfer (1) für Kraftfahrzeug, umfassend eine Lichtquelle (S), ein Bewegungsantriebsmittel (20), ein bewegliches optisches Element (4), das konfiguriert ist, um von dem Bewegungsantriebsmittel (20) angetrieben zu werden und eingerichtet ist, um einen von der Quelle (S) ausgegebenen Lichtstrahl zu unterbrechen und/oder zu reflektieren, und einen Reflektor (12), wobei der Lichtstrahl von dem Reflektor (12) reflektiert wird, bevor er von dem beweglichen optischen Element (4) unterbrochen und/oder reflektiert wird, wobei der Reflektor (12) die Form eines Abschnitts eines Semiellipsoids aufweist, das sich über der Symmetrieebene des Ellipsoids erstreckt, wobei die Quelle (S) auf der Symmetrieachse (X) des Ellipsoids positioniert ist, wobei der Scheinwerfer (1) weiter einen Kühler (30) umfasst, wobei der Kühler (30) unter der Symmetrieebene des Ellipsoids positioniert ist,
    wobei der Kühler (30) thermisch mit dem Bewegungsantriebsmittel (20) verbunden ist, wobei der Kühler (30) konfiguriert ist, um die Wärme, die aus dem Bewegungsantriebsmittel (20) hervorgeht, abzuleiten, wobei sich der Kühler (30) zumindest teilweise innerhalb des Ellipsoids zwischen einem Boden (13) des Reflektors (12) und dem beweglichen optischen Element (4) befindet, wobei der Kühler (30) zumindest teilweise in einem Volumen (V) positioniert ist, das durch die zylindrische Erstreckung entlang einer optischen Achse einer optischen Linse (3) von einer Umfangskontur der Linse (3) bis zu einer querverlaufenden Ebene, die durch einen Boden (13) des Reflektors (12) verläuft, definiert wird,
    dadurch gekennzeichnet, dass die Lichtquelle (S) unabhängig von der Position des beweglichen optischen Elements (4) eingeschaltet bleibt, wobei der Scheinwerfer einen Strahl ausgibt, der entweder in einer Fernlichtposition im Wesentlichen horizontal gerichtet ist, wenn das bewegliche optische Element (4) in einer ersten Position ist, oder in einer Abblendposition nach unten gerichtet ist, wenn das bewegliche optische Element in einer zweiten Position ist.
  2. Scheinwerfer (1) nach Anspruch 1, wobei sich das Bewegungsantriebsmittel (20) im selben Bereich des Scheinwerfers befindet wie der Kühler (30).
  3. Scheinwerfer (1) nach einem der Ansprüche 1 und 2, wobei die Lichtquelle (S) mindestens eine Leuchtdiode umfasst, als LED-Diode bezeichnet.
  4. Scheinwerfer (1) nach Anspruch 3, wobei der Kühler (30) konfiguriert ist, um die von der oder den LED-Dioden erzeugte Wärme abzuleiten.
  5. Scheinwerfer (1) nach einem der vorstehenden Ansprüche, wobei der Kühler (30) in der Ausgaberichtung des Lichtstrahls dem beweglichen optischen Element (4) vorgelagert positioniert ist.
  6. Scheinwerfer (1) nach einem der vorstehenden Ansprüche,
    dadurch gekennzeichnet, dass der Kühler (30) mittels des Bewegungsantriebsmittels (20) mit einer Armatur in Kontakt steht.
  7. Scheinwerfer (1) nach einem der vorstehenden Ansprüche,
    dadurch gekennzeichnet, dass sich das Bewegungsantriebsmittel (20) unter der Lichtquelle (S) befindet.
  8. Scheinwerfer (1) nach einem der vorstehenden Ansprüche,
    dadurch gekennzeichnet, dass das Bewegungsantriebsmittel (20) zumindest teilweise in dem Volumen (V) positioniert ist.
  9. Scheinwerfer (1) nach Anspruch 1,
    dadurch gekennzeichnet, dass das bewegliche optische Element (4) ein Spiegel ist.
EP15793880.4A 2014-10-30 2015-10-22 Semielliptischer projektor mit einem kühler Active EP3212996B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1460430A FR3028004B1 (fr) 2014-10-30 2014-10-30 Projecteur semi-elliptique comprenant un radiateur
PCT/FR2015/052833 WO2016066929A1 (fr) 2014-10-30 2015-10-22 Projecteur semi-elliptique comprenant un radiateur

Publications (2)

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EP3212996A1 EP3212996A1 (de) 2017-09-06
EP3212996B1 true EP3212996B1 (de) 2022-05-04

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EP (1) EP3212996B1 (de)
CN (1) CN107002963B (de)
FR (1) FR3028004B1 (de)
WO (1) WO2016066929A1 (de)

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JP7047330B2 (ja) * 2017-10-30 2022-04-05 市光工業株式会社 車両用の灯具
CN108194892A (zh) * 2018-03-05 2018-06-22 宁波依诺汽车电子有限公司 一种led远近光用切换器以及远近光一体式车灯
CN108224358A (zh) * 2018-03-05 2018-06-29 宁波依诺汽车电子有限公司 一种应用于双光切换器上的切线挡板
WO2020233297A1 (zh) 2019-05-20 2020-11-26 华域视觉科技(上海)有限公司 车灯光学元件组件、车辆照明模组、车灯及车辆
CN111503590A (zh) 2019-06-05 2020-08-07 华域视觉科技(上海)有限公司 车灯光学元件、车灯模组、车辆前照灯及车辆
WO2021093233A1 (zh) * 2019-11-13 2021-05-20 华域视觉科技(上海)有限公司 反射型前照灯模组、前照灯模组、前照灯及车辆
CN110701573A (zh) * 2019-11-15 2020-01-17 马瑞利汽车零部件(芜湖)有限公司 一种使用Mirror Shutter切换点亮不同区域的汽车信号灯及替换结构
CN115095832B (zh) * 2022-06-22 2023-09-12 深圳市傲雷电商科技股份有限公司 一种远近光透镜模组及自行车车灯

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Publication number Publication date
WO2016066929A1 (fr) 2016-05-06
FR3028004A1 (fr) 2016-05-06
CN107002963A (zh) 2017-08-01
CN107002963B (zh) 2019-12-10
FR3028004B1 (fr) 2019-08-02
EP3212996A1 (de) 2017-09-06

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