EP1746340B1 - Optisches Modul für eine Kfz-Beleuchtungseinrichtung - Google Patents

Optisches Modul für eine Kfz-Beleuchtungseinrichtung Download PDF

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Publication number
EP1746340B1
EP1746340B1 EP06291099A EP06291099A EP1746340B1 EP 1746340 B1 EP1746340 B1 EP 1746340B1 EP 06291099 A EP06291099 A EP 06291099A EP 06291099 A EP06291099 A EP 06291099A EP 1746340 B1 EP1746340 B1 EP 1746340B1
Authority
EP
European Patent Office
Prior art keywords
module
optical element
mask
light
reflector
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.)
Not-in-force
Application number
EP06291099A
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English (en)
French (fr)
Other versions
EP1746340A3 (de
EP1746340A2 (de
Inventor
Jean-Luc Meyrenaud
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 PL06291099T priority Critical patent/PL1746340T3/pl
Priority to SI200630421T priority patent/SI1746340T1/sl
Publication of EP1746340A2 publication Critical patent/EP1746340A2/de
Publication of EP1746340A3 publication Critical patent/EP1746340A3/de
Application granted granted Critical
Publication of EP1746340B1 publication Critical patent/EP1746340B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/40—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
    • 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
    • F21S41/337—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector having a structured surface, e.g. with facets or corrugations
    • 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
    • F21S41/68—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 present invention relates to an optical module for automobile lighting device of the projector type. It applies more particularly 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 concerned with optical modules equipped with a fixed or movable cover able to intercept at least partially, depending on its position, the light beam emitted by the light source / reflector assembly.
  • the shape of the upper edge of the cache makes it possible to define the desired cut in the beam by imaging with the convergent lens.
  • 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 cross beam (oblique cut) or anti-fog (horizontal cut).
  • 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.
  • the patent FR 2 754 039 which describes modules able to emit crossover beams or anti fog for example.
  • the cache is fixed or mobile, and whatever the type of cut that it defines in the beam, it remains that all the luminous flux which is intercepted by the cache is lost, and the light output, that is to say the ratio between the light emitted by the lamp and that returned at the output of the optical module, is not very satisfactory.
  • the object of the invention is therefore the development of a cache optical module of the type described above, in particular of the elliptical type, which has improved optical performance.
  • it is a question of being able to increase the luminous efficiency of this type of module, without deteriorating the regulatory photometric characteristics of the cut-off beams obtained.
  • the invention aims to achieve this goal without disrupting the design of current optical modules.
  • an additional optical element is completely arranged between the light source and the cover, said additional optical element being in the vicinity of the optically active edge of the cover and having at least one reflecting surface capable of redirecting over the optically active edge of the cover of the light rays emitted by the source towards said cache.
  • At least one point of the additional optical element is located between the focus of the dioptric element of the convergent lens type and the reflector: this additional optical element is at least partly, in particular completely, disposed between the source and the cache or between the reflector and the cover.
  • source-light rays means the rays directly emitted by the source and the rays indirectly emitted by the source, namely the rays emitted by the source and then reflected, in particular at least one times by the wall of the reflector in which the light source is located.
  • the optical module is of elliptical module type: the source is placed at a first rear focus of the reflector, or in the vicinity thereof, and the dioptric element is placed at the external focus of the reflector or in the vicinity thereof .
  • the reflector is then shaped close to an ellipsoid.
  • the additional optical element can be integral or even integral part of the cache. It is possible to mount the optical element on the cover or the support of the cover by any known fastening means, in particular by clipping, crimping, welding, gluing, overmolding. We can also make the cache (or its support) and this optical element one piece.
  • the reflecting surface of the additional optical element preferably has an upwardly facing face, the leading edge of which substantially follows, at least locally, the profile of the optically active edge of the mask. This means that the front edge of the element substantially adopts the shape of the edge of the cache. Indeed, this choice has been judicious to minimize the risk of creating blur in the beam emitted by the module in the vicinity of the cut.
  • 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.
  • One embodiment is that the front edge of the additional optical element is attached to the optically active edge of the cache.
  • the reflecting surface of the additional optical element has an upwardly facing face and is preferably disposed adjacent to only the central portion of the cover.
  • the reflective surface of the additional optical element has an upwardly facing face and has a notch at its rear edge.
  • the indentation can actually delimit two side zones that extend rearward to further enhance the recovery of light by coming "surround” the lamp (of course respecting a sufficient distance with the lamp).
  • the front edge of the face in question preferably comprises a broken line, namely a succession of line segments, without excluding possibly also curve portions.
  • This front edge is substantially preferably a generator for the shape of the upwardly facing face mentioned above. is then composed, for example, a succession of inclined planes relative to each other substantially aligned along the optical axis of the module.
  • the rear edge of the face in question preferably has a profile similar to, or identical to that of the front edge. It can also have a different profile, curve for example.
  • This face is preferably disposed in a substantially horizontal plane and transversely to the optical axis of the reflector, as may be the case of the cache as well.
  • Its width is then understood by its dimension measured parallel to the optical axis, and its length perpendicular to it. In this case, its width (its smallest dimension) is at least 8 times, in particular at least 10 times smaller than its length (its largest dimension).
  • Its thickness is low.
  • the additional optical element may be in the form of a plate of 2 to 6 mm, in particular 3 to 4 mm wide, and 35 to 60, in particular 40 to 50 mm long. And its thickness can be from 0.2 to 1.5 or 2 mm.
  • this face is curved along its length / largest dimension, with for example an arrow in the center of the order of 0.5 to 4 mm, especially 1 to 2 mm .
  • the curved shape (upwards) is advantageous for contributing to ensuring good linearity of the cutoff of the light beam. It can help to compensate for any optical defects inherent in the reflector or the dioptric element.
  • the reflecting surface of the additional optical element has an upwardly facing face which is smooth. According to another embodiment, it comprises, at least locally, streaks and / or corrugations. These surface modifications give an additional possibility of controlling the distribution of the rays recovered in the beam emitted by the module: they make it possible in particular to spread the beam. They can be distributed over the entire reflecting surface, including the lateral areas mentioned above.
  • the ridges and / or undulations are preferably substantially oriented parallel to the optical axis of the module.
  • the striations and / or undulations can be of evolutionary form, especially when the upwardly facing face referenced above is flat. It is understood by evolutionary streak, a streak whose starting profile and the arrival profile are different.
  • the front profile begins at the optically active edge of the cover (which is generally straight), and the back profile is a radius or ripple.
  • corrugation steps of about 0.5 to 1.5 mm and arrows of 0.2 to 1 mm may be provided.
  • the cover can be a mobile cover for making a bi-function or multi-function projector, including a bi-function module code / route or a multifunction module.
  • the optical module according to the invention can emit at least one type of cut-off beam among those described at the beginning of this text.
  • the invention also relates to a motor vehicle headlamp equipped with at least one optical module as described above.
  • figure 1 if we take a ray r1 emitted by the source and reflected in the upper part of the reflector, we see that this ray passes over the cover to reach the lens. This ray will participate in the overall beam emitted by the module. The radius r2 emitted by the source, it is reflected by a slightly lower zone of the reflector, and it will, in the absence of the element EO, be stopped by the screen: the luminous flux of this ray is so lost.
  • the r2 rays reaches the reflecting face of the optical element EP and will be deflected in the form of a radius r2 'upwards, above the screen: by folding so up at least a portion of the rays that would otherwise be intercepted by the screen, the light output of the module is significantly improved.
  • the invention makes it possible to add luminous flux in the central part of the beam: by adding the "corrugated folder" according to the figure 3b as an indication, a total flux of about 712 lumens to a total flux of about 870 lumens is increased from a maximum of about 46 lux to a maximum of about 72 lux.
  • the positive effect of the folder is present regardless of the form of the cut (code, motorway ..) and it can adapt whatever the shape of the screen (which can be mono or multi component).
  • the invention can be applied mutadis mutandis to elliptical modules having a cache that is movable: in this case it is necessary to provide a motor for actuating, preferably integrally, the cache and the folder.
  • the folder can also be detached from the cache.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Claims (18)

  1. Optikmodul (M), insbesondere Ellipsoid-Modul, für Kraftfahrzeugscheinwerfervorrichtungen, das wenigstens einen Lichtbündeltyp mit einer Hell-Dunkel-Grenze zu emittieren vermag und das umfasst:
    - eine in einem Reflektor (R) angeordnete Lichtquelle (S),
    - ein dioptrisches Element (L), insbesondere eine an der Vorderseite des Reflektors (R) angeordnete Sammellinse,
    - eine Blende (C), die zwischen der Lichtquelle (S) und dem dioptrischen Element (L) angeordnet und wenigstens eine optisch wirksame Position aufweisend, in der sie einen Teil der von der Lichtquelle (S) emittierten Lichtstrahlen abfängt, einen Teil des Lichtbündels tatsächlich abschattet, damit das Modul ein Lichtbündel mit Hell-Dunkel-Grenze emittiert, wobei der optisch wirksame Rand der Blende (C) eine Hell-Dunkel-Grenze in dem durch das Modul (M) emittierten Lichtbündel zu bilden vermag,
    dadurch gekennzeichnet, dass ein zusätzliches optisches Element (EO) vollständig zwischen der Lichtquelle (S) und der Blende (C) angeordnet ist, wobei sich das zusätzliche optische Element in der Nähe des optisch wirksamen Rands der Blende (C) befindet und wenigstens eine reflektierende Oberfläche (R1) aufweist, die Lichtstrahlen, die von der Lichtquelle (S) in Richtung der Blende (C) emittiert werden, über den optisch wirksamen Rand der Blende abzulenken vermag.
  2. Modul (M) nach dem vorhergehenden Anspruch,
    dadurch gekennzeichnet, dass die Lichtquelle (S) in einem ersten inneren Brennpunkt (Fi) des Reflektors (R) oder in dessen Nähe angeordnet ist, und dass das dioptrische Element (L) im äußeren Brennpunkt (Fe) des Reflektors (R) oder in dessen Nähe angeordnet ist.
  3. Modul (M) nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass der Reflektor (R) eine Form ähnlich der eines Ellipsoiden hat.
  4. Modul (M) nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass das zusätzliche optische Element (EO) mit der Blende (C) fest verbunden oder Bestandteil desselben ist.
  5. Modul (M) nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass die reflektierende Oberfläche (R1) des zusätzlichen optischen Elements (EO) eine nach oben gewandte Fläche (Fa) aufweist, deren vorderer Rand (Bav) wenigstens stellenweise im Wesentlichen dem Profil des optisch wirksamen Rands der Blende (C) folgt.
  6. Modul (M) nach dem vorhergehenden Anspruch,
    dadurch gekennzeichnet, dass der vordere Rand (B1) des zusätzlichen optischen Elements (EO) mit dem optisch wirksamen Rand der Blende (C) verbunden ist.
  7. Modul (M) nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass die reflektierende Oberfläche (R1) des zusätzlichen optischen Elements (EO) eine Seite (Fa) aufweist, die nach oben gewandt und in der Nähe nur des mittleren Teils der Blende (C) angeordnet ist.
  8. Modul (M) nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass die reflektierende Oberfläche (R1) des zusätzlichen optischen Elements (EO) eine Seite (Fa) aufweist, die nach oben gewandt und mit einem Ausschnitt in Höhe ihres hinteren Rands (Bar) versehen ist.
  9. Modul (M) nach einem der Ansprüche 5 bis 8,
    dadurch gekennzeichnet, dass der vordere Rand (Bav) eine gebrochene Linie aufweist.
  10. Modul (M) nach einem der Ansprüche 5 bis 9,
    dadurch gekennzeichnet, dass der vordere Rand (Bav) im Wesentlichen als Erzeugende für die Form der Fläche (Fa) dient.
  11. Modul (M) nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass die reflektierende Oberfläche (R1) des zusätzlichen optischen Elements (EO) eine nach oben gewandte Fläche (Fa) aufweist, deren hinterer Rand (Bar) ein Profil hat, das dem des vorderen Rands (Bav) ähnlich, gleich oder von diesem abweichend ist.
  12. Modul (M) nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass die reflektierende Oberfläche (R1) des zusätzlichen optischen Elements (EO) eine nach oben gewandte Fläche (Fa) mit einer verwundenen Oberfläche aufweist.
  13. Modul (M) nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass die reflektierende Oberfläche (R1) des zusätzlichen optischen Elements (EO) eine nach oben gewandte Fläche (Fa) aufweist, die glatt ist oder die wenigstens stellenweise Rippen (ST) und/oder Wellen (O) aufweist.
  14. Modul (M) nach dem vorhergehenden Anspruch,
    dadurch gekennzeichnet, dass die Rippen (ST) und/oder Wellen (O) im Wesentlichen parallel zur optischen Achse (X) des Moduls ausgerichtet sind.
  15. Modul (M) nach Anspruch 13 oder 14,
    dadurch gekennzeichnet, dass die Rippen (ST) und/oder Wellen (O) eine evolutionäre Form haben.
  16. Modul (M) nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass der Reflektor (R) in seinem unteren Teil abgestumpft ist.
  17. Modul (M) nach wenigstens einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass die Blende (C) eine bewegliche Blende ist, die einen Bifunktions- oder Multifunktions-Scheinwerfer, insbesondere ein Bifunktions-Abblendlicht/Fernlicht-Modul oder ein Multifunktions-Modul auszuführen erlaubt.
  18. Kraftfahrzeugscheinwerfer, ausgestattet mit einem Optikmodul (M) nach wenigstens einem der vorhergehenden Ansprüche.
EP06291099A 2005-07-21 2006-07-03 Optisches Modul für eine Kfz-Beleuchtungseinrichtung Not-in-force EP1746340B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL06291099T PL1746340T3 (pl) 2005-07-21 2006-07-03 Moduł optyczny dla urządzenia oświetlającego samochodu
SI200630421T SI1746340T1 (sl) 2005-07-21 2006-07-03 Optični modul za avtomobilsko osvetljevalno napravo

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0507785A FR2888916B1 (fr) 2005-07-21 2005-07-21 Module optique pour dispositif d'eclairage automobile

Publications (3)

Publication Number Publication Date
EP1746340A2 EP1746340A2 (de) 2007-01-24
EP1746340A3 EP1746340A3 (de) 2007-11-07
EP1746340B1 true EP1746340B1 (de) 2009-07-29

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Application Number Title Priority Date Filing Date
EP06291099A Not-in-force EP1746340B1 (de) 2005-07-21 2006-07-03 Optisches Modul für eine Kfz-Beleuchtungseinrichtung

Country Status (8)

Country Link
US (1) US7722233B2 (de)
EP (1) EP1746340B1 (de)
AT (1) ATE438065T1 (de)
DE (1) DE602006008074D1 (de)
ES (1) ES2328622T3 (de)
FR (1) FR2888916B1 (de)
PL (1) PL1746340T3 (de)
SI (1) SI1746340T1 (de)

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FR2839139B1 (fr) 2002-04-25 2005-01-14 Valeo Vision Module d'eclairage elliptique sans cache realisant un faisceau d'eclairage a coupure et projecteur comportant un tel module
JP4024618B2 (ja) * 2002-08-09 2007-12-19 株式会社小糸製作所 車両用前照灯
FR2847655B1 (fr) 2002-11-21 2005-03-04 Valeo Vision Projecteur elliptique pour vehicule automobile emettant des faisceaux d'eclairage differents

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1422472A2 (de) * 2002-11-21 2004-05-26 Valeo Vision Elliptischer Kfz-Scheinwerfer zur Erzeugung von verschiedenen Lichtbündeln

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EP1746340A3 (de) 2007-11-07
PL1746340T3 (pl) 2009-12-31
SI1746340T1 (sl) 2009-12-31
EP1746340A2 (de) 2007-01-24
US20070019430A1 (en) 2007-01-25
US7722233B2 (en) 2010-05-25
ATE438065T1 (de) 2009-08-15
ES2328622T3 (es) 2009-11-16
DE602006008074D1 (de) 2009-09-10
FR2888916A1 (fr) 2007-01-26
FR2888916B1 (fr) 2007-09-28

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