EP1962015B1 - Projecteur pour véhicule automobile - Google Patents

Projecteur pour véhicule automobile Download PDF

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Publication number
EP1962015B1
EP1962015B1 EP08151346.7A EP08151346A EP1962015B1 EP 1962015 B1 EP1962015 B1 EP 1962015B1 EP 08151346 A EP08151346 A EP 08151346A EP 1962015 B1 EP1962015 B1 EP 1962015B1
Authority
EP
European Patent Office
Prior art keywords
cache
mask
respect
module according
optical module
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
EP08151346.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1962015A1 (fr
Inventor
Sébastien Casenave
Ran Fujita
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.)
Valeo Vision SAS
Original Assignee
Valeo Vision SAS
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 Valeo Vision SAS filed Critical Valeo Vision SAS
Priority to PL08151346T priority Critical patent/PL1962015T3/pl
Publication of EP1962015A1 publication Critical patent/EP1962015A1/fr
Application granted granted Critical
Publication of EP1962015B1 publication Critical patent/EP1962015B1/fr
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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
    • F21S41/40—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
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout 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
    • F21S41/30—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

Definitions

  • the invention relates to an optical module for a projector-type lighting device, intended in particular for a motor vehicle.
  • the invention also relates to a projector equipped with such an optical module, and a motor vehicle equipped with at least one such projector.
  • the invention relates more particularly to the light source and cache type modules, in particular the elliptical type modules with an elliptical type reflector and a lens-type convergent lens, for example a Fresnel lens or not .
  • such a module is intended to emit a light beam towards the front of a vehicle, and comprises in the usual way an elliptical type reflector, which comprises two focal points arranged on its optical axis, a light source located in the vicinity the first focus, and a cache arranged in the vicinity of the second focus.
  • the cache may be fixed, so that the module emits a single type of cut-off beam, for example a code whose cutoff comprises a horizontal cutoff portion and an oblique cutoff portion, or a fog-beam, with a flat cut, the cover selectively obscuring a portion of the rays emitted by the source / reflected by the reflector.
  • a single type of cut-off beam for example a code whose cutoff comprises a horizontal cutoff portion and an oblique cutoff portion, or a fog-beam, with a flat cut
  • the cover can also be mounted movably, for example by being pivotally mounted about an axis of rotation substantially orthogonal to the optical axis of the module, and it can be provided with one or more shutters defining "optically active" edges. ", That is to say edges intercepting part of the rays from the source before they leave the module.
  • the cache With a cache with only one "optically active” position, the cache intercepts rays to give the beam emitted by the module a given break, and it can then switch to the "inactive" position on the optical plane, so that the beam emitted presents more break, the cache no longer intercepting rays.
  • a bi-function module of the code / route type, for example.
  • the cache may also have multiple "optically active" edges Different: Depending on the angular position of the cover, the shutters perform a given cut of the light beam. It is thus possible to have a multi-function module capable of emitting several beams with different cuts, with possibly even a function with an unbroken beam also if the cache also has a position "optically inactive" possible.
  • the beams with or without cut that can be obtained with these elliptical modules cache include, for example, position lights, dipped beams, road beams, beams for driving on the highway, for driving in the city , for driving in bad weather, the fog beams.
  • caches that reverse the cut of the code / crossover beams depending on whether the vehicle is in a country with right or left traffic.
  • a first solution to this problem was to cover all two caches with a black paint that limits any reflection of the rays.
  • This solution is effective, but it is not without drawbacks, first of all by the additional manufacturing step that it requires, since it generally forces to treat all of the two covers with this paint, in particular by a electrolysis process. Then, under conditions of use, there is always a potential risk that this opaque coating peels or deteriorates in such a way that the parasitic rays reappear uncontrollably.
  • the invention therefore aims to develop a new type of "split" cache overcoming the aforementioned drawbacks, and which can, in particular, make cuts in beams substantially without parasitic rays above the cut, and this without complicating the manufacture of the cache.
  • a split-type cache described above which can keep throughout the life of the lighting module its properties, including its properties of no creation of parasitic rays that can be dazzling because above the cut.
  • the invention relates to an optical module for a motor vehicle lighting device comprising at least one reflector, a light source and a dual cache system comprising two optically active cache portions offset relative to one another by relative to the optical axis of the module, such that the second portion is inclined, at least over part of its (upper) zone capable of receiving rays coming from the source or reflector, of at least 35.degree. at least 38 to 40 °, especially at least 42 or 45 ° relative to the vertical or relative to the median plane of the first cache portion.
  • the second cache portion has at least one shoulder.
  • This shoulder may thus delimit an upper portion of the second cache portion which is inclined at least 35 °, in particular at least 38 to 40 °, in particular at least 42 or 45 °, relative to the vertical or relative to the median plane of the first cache portion and a lower portion which is inclined at a lower angle, in particular an angle less than or equal to 25 °, in particular less than or equal to 20 °.
  • the rest of the second cache portion may be less strongly inclined, which contributes to a gain of space according to the depth of the optical module.
  • the invention also relates to an optical module for a motor vehicle lighting device comprising at least one reflector, a light source, a lens and a dual cache system comprising two optically active cache portions offset with respect to the other relative to the optical axis of the module, the second portion of the cover being sufficiently inclined relative to the first portion or relative to the vertical, so that rays coming from the source or the reflector and which are reflected on its inner face to the outer face of the first edge of the cover is substantially returned to the rear of the module and / or above the lens.
  • this inclined portion a shoulder therefore, which preserves in the lower part an inclination of the second usual cache portion, and which provides an upper zone, above this shoulder, more inclined : this is a preferred design if we start, in particular, a split-in-one cache as described in the EP Patent 1,584,862 cited above. But we can also prefer that the entire second edge is more strongly inclined than is the use, especially when using a split cover where each edge is made of a separate component.
  • the second cache is, on at least part of its height (upper part, as the most likely to receive and then return parasitic rays), significantly more inclined than in known caches, with effect that some of the rays, following the typical path described above, are this time returned by the outer face of the first edge in a direction such that they no longer meet the lens: they no longer parasitize with the beam emitted by the module , they will actually "get lost” above the lens, or even returned to the back of the module.
  • modifying the second edge thus eliminates most of the parasitic rays of the beam.
  • the lens in question is for example the convergent lens of the elliptical modules, in known manner.
  • upper, lower, lower, vertical or horizontal are to be understood as referring to the optical module or its components in their vehicle mounting position (possibly previously integrated into a projector, knowing by other than for certain cut-off beams, it may be necessary to mount the modules in such a way that that their optical axis is not rigorously horizontal, but slightly lowered, from 0.5 to 2 ° for example with respect to the horizontal).
  • the double cover in question can be made in one piece, or it can be composed of several pieces.
  • the edge edge of the first cover is inclined relative to the horizontal, so that the slope of said edge is positive relative to the general direction of light emission of the module.
  • the edge edge of the first cover can thus be inclined at least 10 °, especially at least 15 or 20 °, relative to the horizontal.
  • the two edges of the cover can be devoid of absorbing coating, since the problems of multiple reflection or grazing reflection of the double covers are counteracted differently: this avoids the coating deposition step, and avoids any risk of wear or peeling of this coating during the life of the optical module.
  • the design of the double cover is judicious and any opacifying / absorbing coating can be removed.
  • the cache retains its anti-chromatic aberration properties and can keep its position substantially in the module: it is not necessary to review the design of the means to implement the double cache in the module, which is, at the industrial level, very advantageous
  • the cache is fixed: it is then a mono function module, code for example.
  • the cache is mobile, in particular rotatably mounted along an axis substantially perpendicular to the optical axis of the module: it can then have a bi or multi-function module (code / route, or code / highway code / road .7)
  • the module comprises above the double cover a fixed cover.
  • This cache is a component on which, for example, the "parasitic" rays will be lost, since deviated from their trajectory towards the lens.
  • the invention also relates to the motor vehicle headlamp, comprising an optical module as described above, and the motor vehicle comprising at least one such module or at least one such projector
  • the figure 1 is the representation of a conventional double cache, of the type described in the patent EP 1 584 862 : the cover is of a piece, of V-shaped cross-section, with a first part of cache C1 and a second part of cache C2 (the "first cache” being understood as the cache closest to the light source).
  • This cache is intended to create a cut code-type, oblique cut at 15 ° therefore according to European standards, in a beam emitted by an optical module type elliptical module.
  • the first edge in the mounting position as shown in the figure, is a substantially planar wall and disposed in a substantially vertical plane, its upper edge B1 delimiting the oblique cutting prenention town: it has three optically active portions: two horizontal portions connected by an oblique portion.
  • the second cache C2 is inclined at a given angle relative to the plane of the first cache C1, its upper edge B2 "follows" the same shape as the edge B1 of the first cache C1, with two horizontal portions connected by an oblique portion.
  • edge B2 is lower than the edge B1: it stops here at about 2/3 of the height of the edge B1. This height can be chosen between 1/3 and 3 ⁇ 4 of said height.
  • This cover is arranged appropriately with respect to the lens (depending on the position of its focal plane in the white, in the red and in the blue) so as to combat chromatic aberrations while minimizing any loss of performance: relative position of the two edges B1 and B2 is therefore chosen according to this objective.
  • This cover is made of sheet metal, and completely covered with an absorbing black opaque paint.
  • This coating is understood from the figure 3 : rays (an example is shown in solid lines, the dotted lines corresponding to the normals to the faces) reach the internal face f21 of the second cache part C2. If the sheet of this face 21 is left bare, it has sufficient reflectivity for these rays are returned, or at least part of them, to the outer face f12 of the first cache C1. These rays will mainly hit the face f21 in its upper part, near the active edge B2 (for example on at most the last third of its height).
  • figure 4 This is illustrated by figure 4 , highly schematic, representing the distribution of a code-type beam with an elliptical module using this type of cache: there is a zone Z1 regulatory code beam, and a small zone Z2, generally centered on the intersection of the orthonormal coordinate system, which is a portion of parasitic rays located above the cut.
  • FIG. 5a represents very schematically the elliptical module (in operating position), with the reflector R, the cache C1, C2, the lens L, and a cache CA, which is a plate in the upper part of the module, which stops unwanted rays, coming C1, C2 and / or reflector.
  • the light source not shown, is at the bottom of the reflector R.
  • the new cover according to the invention must therefore ensure that the rays in the red reflected by the second cache portion C2 can pass above the first cache portion C1.
  • the second cache portion C2 must be inclined at an angle such that the angle of incidence of the red rays is less than the value from ⁇ .
  • the red rays are then returned to the reflector R, which proved to have a negligible impact on the constitution of the beam code by the module.
  • the area of the cache C2 that is most likely to create spurious rays is the middle zone of the cache (parasitic rays more or less centered on the intersection of the reference axes).
  • the middle zone of the cache parasitic rays more or less centered on the intersection of the reference axes.
  • the figure 6 explains how the choice of the slope of the edge B1 of the cache C1 represented in FIG. figure 2 .
  • This figure represents the double mask, the lens of diameter D, the distance t between the first edge of the internal face of the lens, and a parasitic ray r striking the edge of the edge B1 to start upwards in the direction of the lens.
  • the angle ⁇ that the edge B1 makes with the horizontal is to be chosen to be greater than or equal to Arctang (D / 2 / t). In fact, in practice, 2 ⁇ is chosen to take into account field effects.
  • the result is a slope of B1 of about 20 ° (15 to 30 °).
  • the invention also applies to multi-component covers: one can also have C1 and C2 in two separate sheet metal parts, both of which are then secured to a common support / frame. One can also have the cache C1 extending in the lower part in a support area, on which one just fix the cache C2 or vice versa.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP08151346.7A 2007-02-22 2008-02-13 Projecteur pour véhicule automobile Active EP1962015B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08151346T PL1962015T3 (pl) 2007-02-22 2008-02-13 Reflektor dla pojazdu mechanicznego

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0701290A FR2913094B1 (fr) 2007-02-22 2007-02-22 Projecteur pour vehicule automobile.

Publications (2)

Publication Number Publication Date
EP1962015A1 EP1962015A1 (fr) 2008-08-27
EP1962015B1 true EP1962015B1 (fr) 2014-12-10

Family

ID=38335669

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08151346.7A Active EP1962015B1 (fr) 2007-02-22 2008-02-13 Projecteur pour véhicule automobile

Country Status (4)

Country Link
EP (1) EP1962015B1 (es)
ES (1) ES2532373T3 (es)
FR (1) FR2913094B1 (es)
PL (1) PL1962015T3 (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2917484B1 (fr) 2007-06-18 2009-10-02 Valeo Vision Sa Module optique pour dispositif d'eclairage automobile
DE102011003814A1 (de) * 2011-02-08 2012-08-09 Automotive Lighting Reutlingen Gmbh Lichtmodul eines Kraftfahrzeugscheinwerfers
DE102012220507A1 (de) * 2012-11-09 2014-05-15 Automotive Lighting Reutlingen Gmbh Lichtmodul für einen Scheinwerfer eines Kraftfahrzeugs

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2566878B1 (fr) * 1984-06-27 1986-07-18 Cibie Projecteurs Perfectionnements aux projecteurs automobiles emettant un faisceau coupe, notamment un faisceau de croisement
US5373424A (en) 1992-10-21 1994-12-13 Koito Manufacturing Co., Ltd. Automotive projection headlamp
DE19921907A1 (de) 1999-05-12 2000-11-16 Hella Kg Hueck & Co Scheinwerfer für Fahrzeuge
EP1193440A1 (en) * 2000-10-02 2002-04-03 Stanley Electric Co., Ltd. Headlamp for vehicle
FR2868828B1 (fr) 2004-04-09 2007-03-16 Valeo Vision Sa Projecteur lumineux pour vehicule automobile avec faisceau a coupure, et ensemble de cache pour un tel projecteur
FR2869273B1 (fr) 2004-04-27 2006-08-04 Valeo Vision Sa Assemblage d'un ressort de torsion entre une piece fixe et une piece mobile d'un dispositif d'eclairage et/ou de signalisation de vehicule automobile
JP4498977B2 (ja) * 2005-05-18 2010-07-07 株式会社小糸製作所 車両用前照灯
FR2888916B1 (fr) * 2005-07-21 2007-09-28 Valeo Vision Sa Module optique pour dispositif d'eclairage automobile

Also Published As

Publication number Publication date
FR2913094A1 (fr) 2008-08-29
ES2532373T3 (es) 2015-03-26
EP1962015A1 (fr) 2008-08-27
PL1962015T3 (pl) 2015-05-29
FR2913094B1 (fr) 2009-05-15

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