EP1726875A1 - Optisches Modul für Fahrzeug -Beleuchtungseinrichtung - Google Patents

Optisches Modul für Fahrzeug -Beleuchtungseinrichtung Download PDF

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Publication number
EP1726875A1
EP1726875A1 EP06290836A EP06290836A EP1726875A1 EP 1726875 A1 EP1726875 A1 EP 1726875A1 EP 06290836 A EP06290836 A EP 06290836A EP 06290836 A EP06290836 A EP 06290836A EP 1726875 A1 EP1726875 A1 EP 1726875A1
Authority
EP
European Patent Office
Prior art keywords
optical module
module
heat shield
support piece
screen
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP06290836A
Other languages
English (en)
French (fr)
Other versions
EP1726875B1 (de
Inventor
Jean-Francois Cavanna
Philippe Natchoo
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
Publication of EP1726875A1 publication Critical patent/EP1726875A1/de
Application granted granted Critical
Publication of EP1726875B1 publication Critical patent/EP1726875B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/04—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for filtering out infrared radiation
    • 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/47—Attachment 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
    • F21S41/60—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
    • F21S41/689—Flaps, i.e. screens pivoting around one of their edges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/10—Protection of lighting devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F21V7/28—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by coatings
    • 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

Definitions

  • the present invention relates to an optical module for automobile lighting device of the projector type. It applies in particular to optical modules called elliptical modules comprising a light source associated with a reflector and closed by a dioptric element of the convergent lens type, for example a plano-convex lens, Fresnel lens.
  • the invention is more particularly concerned with optical modules equipped with a mobile cover able to intercept at least partially, depending on its position, the light beam emitted by the light source / reflector assembly.
  • EP 1 197 387 for more details on this type of module, refer to the patents EP 1 197 387 , EP 1 422 471 or EP 1 422 472 .
  • the mobile cover on command and thanks to the presence of a motor, can take different positions with respect to the light source, including at least one position called “active” optically, that is to say a position where it obscures actually a part of the light beam, in particular for the module to emit a cut-off beam, such as a crossover or fog-type beam.
  • the cache may thus have one or more "active" positions, for example two, one for the traffic crossing function on the right and one for the traffic function on the left, and also a so-called “passive” function where it does not block the beam. light, thus allowing the module to emit light beams without cutoff of the road beam type.
  • a particular type of optical module makes it possible to obtain at night a visible image of the road on a control screen.
  • This type of module is in fact able to emit a beam of the road beam type, equipped with a mobile infrared filter, which can be placed on command from a first position in which it filters all the visible light signals produced by the light source of the projector, so that only infrared, non-glare, actually come out of the module, to a second position in which the filter does not hide any visible light signal produced by the light source of the projector. Then, depending on the position of the filter, there is either a conventional road beam in the visible, or a beam of the same range but in the infrared. For more details, see the patent EP 1 139 011 .
  • the cache and the infrared filter are two particular examples of cache, including mobile.
  • the modules concerned by the invention are all those that are likely to be equipped with a part intended to receive light rays emitted by the light source equipping the modules, in particular either for filtering or for intercept them, these caches can be fixed or mobile.
  • the term "cache" will be used in all these achievements in this text, for the sake of brevity.
  • this cache when it is mobile requires, as we have seen, a motor and a set of parts necessary to support them.
  • One solution is to choose metal support parts, because of the robustness of this material. But this material also has the disadvantage of being heavy and expensive, which is even more penalizing if the module must operate in DBL.
  • Another solution is to use plastic parts, polymer parts that are lighter and can easily take on complex geometric shapes. But many thermal constraints exist, which may call into question their use, including the heat released by the light source, of course, but also that released by the engine and even the heat of the solar rays entering the module when the projector is off, parked in full sun for example, exacerbated phenomenon in the case of elliptical modules with the presence of the converging lens closing the module. This type of problem arises in a similar way with optical modules with a cache that is not mobile but fixed.
  • the object of the invention is therefore the development of an optical module of the type described above, in particular of the elliptical type, which can have recourse to plastic support parts while minimizing any risk of degradation thereof during time.
  • the support part is predominantly of polymer material and a heat shield is disposed between at least a portion of said part and the front of the module.
  • the module according to the invention also comprises a dioptric element, convergent lens type, Fresnel lens, at the front of the module, the heat shield then being disposed between at least a portion of the support piece and the element dioptric.
  • front is understood throughout the present text according to the position of the module once integrated, possibly in a projector, and mounted on a vehicle in normal operating mode.
  • Add a heat shield is a simple and effective solution to minimize any risk of deterioration of the polymer support piece: positioning this screen in front of the room has the effect of limiting the effects of the penetration of solar rays in the module, the screen thermal blocking all or part of them before they reach the polymer part.
  • the presence of the convergent type lens at the front of the module only accentuates the effect of concentration of heat from the sunlight inside the module and likely to affect this support piece.
  • a simple screen for example a metal sheet, is sufficiently effective to satisfactorily protect the polymer support piece "behind" him.
  • the invention thus makes it possible to make extensive use of plastic components in the modules, which is very interesting as mentioned above, and to prevent their degradation by preventing them from being subjected to excessive temperature rises, at least partially doubling the faces of these most exposed parts by a screen.
  • the simplest technique is to provide that the heat shield is mounted on the support part, in particular by screwing, crimping, clipping, riveting or overmolding. This ensures a correct positioning of the screen relative to the room.
  • the heat shield is disposed in front of the support piece so as to leave a space between the rear face of the screen and the front face of the support piece.
  • a space of at least 0.5 mm, especially at least or about 0.8 or 1 mm is chosen.
  • This space can have a locally varying thickness. This choice has two advantages. Thermally first, this space defines an air space that plays a role of appreciable thermal insulation. Finally, on the mechanical level, a direct contact between two walls of two different materials, for example locally flat, is not easy to achieve because it requires a very low tolerance on the sizing of the parts in question.
  • a mounting is chosen by crimping the screen on the support piece, with crimping pins on the support part cooperating with openings on the screen.
  • the initial shape of these spikes before crimping is not critical: the support piece can be molded with small openings in the mold allowing the formation of these spikes by controlled flow of material through these openings out of the mold. We can mold the piece without significantly complicating the mold design.
  • the support piece and the heat shield are provided with complementary relative positioning means, in particular at least one pad on the support cooperating with an opening on the screen or vice versa.
  • the pins and / or pads, and preferably both pins and pads are provided with shoulders, in order to mount the heat shield on the support part substantially without direct contact between the support piece and screen: it is thus easy to create the intermediate space, the air space mentioned above.
  • the heat shield is essentially metallic. It may be steel sheet for example. It is a robust material that will block the thermal rays, especially by absorption. The support piece in polymer / metal screen is still significantly less heavy and less expensive than if everything was metal.
  • the heat shield is mono- or multi-component, the mono-component solution being preferred because the simplest to realize and implement.
  • the support piece is made of reinforced polymer, in particular with glass fibers, to give it the necessary mechanical strength.
  • a polymer is preferably selected for the support piece which is best resistant to high temperatures. It is advantageous if it is as little absorbent with respect to heat as possible: preference is therefore given to support parts made of little / non-absorbent polymer, preferably without pigments, in particular of a light color.
  • the support piece is provided with opening (s) and / or notch (s) facilitating heat dissipation, especially in the area near the engine.
  • the heat shield is provided with opening (s) and / or notch (s) facilitating heat dissipation, especially in the area near the engine.
  • the module may also comprise a lens mounted on a lens holder element, the support piece being an intermediate piece between the front face of the reflector and the lens holder element.
  • the mobile cover may be an infrared filter, or a cover for producing a dual-function or multi-function projector, in particular a bi-function module of the code / route type or a multifunction module.
  • the invention also relates to the motor vehicle headlamp equipped with such an optical module, and the motor vehicle in which is mounted the optical module according to the invention or the automotive headlight integrating said optical module.
  • the support piece 4 is in an intermediate position between the periphery 21 of the reflector 2 and the lens holder 5.
  • Another element 9 is interposed, it is a preferably sheet metal part which has two functions: one is to thermally protect the motor 7 vis-à-vis the rays emitted by the source 3, the other is to participate in the photometry of the light beam emitted by the module 1 in cooperation with the mobile cover 8.
  • This component 9 is optional. In the example shown, it is therefore in fact successively, from the rear to the front of the module 1, the periphery 21 of the reflector 2, then the support part 4, then the component 9 and finally the lens holder 5.
  • the assembly of the lens holder assembly 5, component 9, support piece 4 on the periphery 21 of the reflector is done by three attachment points, by crimping the lens holder 5 which is provided with three crimping pins, two in the upper part and a lower part (not shown), cooperating with openings which coincide on component 9, support part 4 and periphery 21. are shown in Figure 3 and Figure 1 the three openings 44 provided on the support part 4 for this purpose .
  • this part 4 is very thermally stressed by the proximity of the motor 7 and the light source 3 on the one hand, by the fact that its front face is directly on the path of the rays coming from the sun, when the module is off and the rays of the sun have the incidence and the ad hoc intensity.
  • FIGS. 3 and 4 represent the four pins 41 present on the front face of the part 4 and which cooperate with openings 61 present on the screen 6. They also illustrate how to center the two components relative to each other: a substantially cylindrical stud 42 on the front face of the part 4 cooperates with a circular opening 62 on the size screen adjusted to that of the stud. Is also provided another substantially cylindrical stud 42 'on the front face of the part 4, cooperating with an oblong hole 62' on the screen 6. Openings 45 in the room 4 promote heat dissipation, some are located in particular near the potential heating zones of the engine 7.
  • Openings 65 are also provided on the screen 6 for the same purpose. These openings also make it possible to lighten the components 4 and 6.
  • the openings 45 located in the lower part of the support part 4 coincide with the openings 65 provided on the screen, to allow the circulation of air and the resulting heat dissipation.
  • the openings 65 are dimensioned appropriately with respect to the openings 45 on the support part 4, so as to ensure that, in the areas of the support part 4 most likely to heat up, and near or on the edges of these openings, the screen Thermal 6 continues to play its role.
  • Figures 5 to 7 relate to the second embodiment of the invention, and relate to the same type of module as previously described in Figures 1 and 2, but with design variations on the support part and the heat shield. Only those features which differ substantially from the first embodiment will therefore be described in detail.
  • Figure 6 shows the support part variant 4 'carrying a mobile cover 8'.
  • the support piece 4 '(same material as in the first variant) here has only 3 crimping pins 41', two arranged in a plane, the third disposed in a lower plane to the previous one.
  • FIG. 7 represents the heat shield variant 6 ': this piece is obtained by stamping. It has a substantially rectangular central surface A and two lateral faces B inclined with respect to this central surface and substantially symmetrical with respect to each other.
  • the sections B each have a lower flange C with a particular cut in order to best adopt a shape complementary to that of the support piece 4 '.
  • the central surface A also has an opening, here of rectangular shape, which can serve as a centering means with a complementary stud provided on the part 4 '.
  • the surface thus developed by the screen (A + 2B + 2C) is very wrapping vis-à-vis the surface of the support part 4 'to be thermally protected, which is thermally favorable, and can be seen in Figure 6, showing the two components assembled.
  • the screen 6 ' has undergone a surface treatment on its front face: a coating deposit by anodization for example.
  • This coating can have several functions. Its first function can be thermal, especially when we choose a coating / a light-colored paint, which reflects light (and therefore the thermal contribution related to visible solar radiation), and thus enhances the thermal properties of the screen.
  • the function can also be aesthetic / photometric: the support piece, once the optical module mounted in the projector, can remain at least partially visible, seen from the outside, and it may be desired that this piece appears a particular color dark, for example, and of a particular aspect, shining or matt for example.
  • the described elliptical module can be used for a function called DBL, being equipped with appropriate means for the emitted beam can "turn" in turns, or for a function FBL being equipped with appropriate means to light in turns.
  • the invention can be applied mutadis mutandis to elliptical modules having a cover which is fixed: in this case there is no more motor, but risks of heating of the support part (light source, solar rays) remain and the screen is also just as useful in this configuration.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
EP06290836A 2005-05-27 2006-05-23 Optisches Modul für Fahrzeug -Beleuchtungseinrichtung Active EP1726875B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0505409A FR2886376B1 (fr) 2005-05-27 2005-05-27 Module optique pour dispositif d'eclairage automobile

Publications (2)

Publication Number Publication Date
EP1726875A1 true EP1726875A1 (de) 2006-11-29
EP1726875B1 EP1726875B1 (de) 2010-01-27

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ID=35994645

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EP06290836A Active EP1726875B1 (de) 2005-05-27 2006-05-23 Optisches Modul für Fahrzeug -Beleuchtungseinrichtung

Country Status (4)

Country Link
EP (1) EP1726875B1 (de)
AT (1) ATE456768T1 (de)
DE (1) DE602006011977D1 (de)
FR (1) FR2886376B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2060848A1 (de) * 2007-11-16 2009-05-20 Valeo Vision Elliptischer Scheinwerfer für Kraftfahrzeug der mit einer Lichtblende für Reisen in Länder mit Verkehr auf der anderen Fahrbahnseite ausgestattet ist
FR2986197A1 (fr) * 2012-01-30 2013-08-02 Aml Systems Barrette de coupure de faisceau lumineux pour module optique et le module optique
FR3039879A1 (fr) * 2015-08-06 2017-02-10 Valeo Iluminacion Sa Aspect brillant pour projecteur de vehicule
EP3388740A1 (de) * 2017-04-11 2018-10-17 Valeo Lighting Hubei Technical Center Co Ltd Beleuchtungsmodul und kraftfahrzeug damit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009035564A1 (de) * 2009-07-31 2011-02-03 Hella Kgaa Hueck & Co. Scheinwerfer für ein Kraftfahrzeug
FR3140928A1 (fr) * 2022-10-04 2024-04-19 Valeo Vision Module lumineux comportant un boîtier en plastique muni d’une pièce de protection du boîtier en plastique contre l’effet de rayons lumineux focalisés

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19621254A1 (de) * 1996-05-25 1997-11-27 Bosch Gmbh Robert Scheinwerfer für Fahrzeuge
EP1139011A1 (de) 2000-03-31 2001-10-04 Valeo Vision Raumsparender Infrarot-Scheinwerfer für Fahrzeuge nach dem Projektionsprinzip
EP1197387A1 (de) 2000-10-12 2002-04-17 Valeo Vision Kraftfahrzeugscheinwerfer mit verstellbarer Blende
EP1283390A2 (de) * 2001-08-10 2003-02-12 Ichikoh Industries, Ltd. Scheinwerfer mit zwei Funktionen
EP1422472A2 (de) 2002-11-21 2004-05-26 Valeo Vision Elliptischer Kfz-Scheinwerfer zur Erzeugung von verschiedenen Lichtbündeln
EP1422471A2 (de) 2002-11-21 2004-05-26 Valeo Vision Elliptischer Kfz-Scheinwerfer zur Erzeugung von verschiedenen Lichtbündeln
EP1454793A2 (de) * 2003-03-07 2004-09-08 Ichikoh Industries, Ltd. Scheinwerfer mit veränderbarem Licht

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19621254A1 (de) * 1996-05-25 1997-11-27 Bosch Gmbh Robert Scheinwerfer für Fahrzeuge
EP1139011A1 (de) 2000-03-31 2001-10-04 Valeo Vision Raumsparender Infrarot-Scheinwerfer für Fahrzeuge nach dem Projektionsprinzip
EP1197387A1 (de) 2000-10-12 2002-04-17 Valeo Vision Kraftfahrzeugscheinwerfer mit verstellbarer Blende
EP1283390A2 (de) * 2001-08-10 2003-02-12 Ichikoh Industries, Ltd. Scheinwerfer mit zwei Funktionen
EP1422472A2 (de) 2002-11-21 2004-05-26 Valeo Vision Elliptischer Kfz-Scheinwerfer zur Erzeugung von verschiedenen Lichtbündeln
EP1422471A2 (de) 2002-11-21 2004-05-26 Valeo Vision Elliptischer Kfz-Scheinwerfer zur Erzeugung von verschiedenen Lichtbündeln
EP1454793A2 (de) * 2003-03-07 2004-09-08 Ichikoh Industries, Ltd. Scheinwerfer mit veränderbarem Licht

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2060848A1 (de) * 2007-11-16 2009-05-20 Valeo Vision Elliptischer Scheinwerfer für Kraftfahrzeug der mit einer Lichtblende für Reisen in Länder mit Verkehr auf der anderen Fahrbahnseite ausgestattet ist
FR2923775A1 (fr) * 2007-11-16 2009-05-22 Valeo Vision Sa Projecteur elliptique pour vehicule automobile equipe d'un cache vacancier
FR2986197A1 (fr) * 2012-01-30 2013-08-02 Aml Systems Barrette de coupure de faisceau lumineux pour module optique et le module optique
EP2644972A1 (de) * 2012-01-30 2013-10-02 AML Systems Unterbrechungsleiste eines Lichtstrahls für optisches Modul, und entsprechendes optisches Modul
FR3039879A1 (fr) * 2015-08-06 2017-02-10 Valeo Iluminacion Sa Aspect brillant pour projecteur de vehicule
EP3388740A1 (de) * 2017-04-11 2018-10-17 Valeo Lighting Hubei Technical Center Co Ltd Beleuchtungsmodul und kraftfahrzeug damit
US10670222B2 (en) 2017-04-11 2020-06-02 Valeo Lighting Hubei Technical Center Co. Ltd. Lighting module and motor vehicle including the same

Also Published As

Publication number Publication date
FR2886376B1 (fr) 2007-08-17
FR2886376A1 (fr) 2006-12-01
EP1726875B1 (de) 2010-01-27
DE602006011977D1 (de) 2010-03-18
ATE456768T1 (de) 2010-02-15

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