EP1288565B1 - Beleuchtungs- oder Signalvorrichtung für ein Kraftfahrzeug mit verbessertem Aussehen - Google Patents

Beleuchtungs- oder Signalvorrichtung für ein Kraftfahrzeug mit verbessertem Aussehen Download PDF

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Publication number
EP1288565B1
EP1288565B1 EP02291917A EP02291917A EP1288565B1 EP 1288565 B1 EP1288565 B1 EP 1288565B1 EP 02291917 A EP02291917 A EP 02291917A EP 02291917 A EP02291917 A EP 02291917A EP 1288565 B1 EP1288565 B1 EP 1288565B1
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EP
European Patent Office
Prior art keywords
lighting
optical axis
deflective
light
elements
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.)
Expired - Lifetime
Application number
EP02291917A
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English (en)
French (fr)
Other versions
EP1288565A1 (de
Inventor
Jean-Pierre Aynie
Christophe Dubosc
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
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Valeo Vision SAS
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Filing date
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Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP1288565A1 publication Critical patent/EP1288565A1/de
Application granted granted Critical
Publication of EP1288565B1 publication Critical patent/EP1288565B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/255—Filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/40—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

Definitions

  • the present invention relates to lighting or signaling devices for motor vehicles.
  • the lighting or signaling devices used for motor vehicles generally comprise a light source and a reflector for forming a light or signaling light beam along an optical axis.
  • An ice is usually placed in front of the reflector to close the lighting or signaling device and protect it from the weather.
  • the light beam must have characteristics, both spatial and photometric, which must meet various regulations depending on the function performed by this beam. These characteristics were until now obtained by the geometry of the reflector and by deflection elements formed on the closure glass. The current trend is to obtain the characteristics of the beam using the single reflector, the closure glass then being smooth or weakly deviating.
  • the entire interior of the lighting or signaling device is visible from the outside, which opens to the designers of these devices new possibilities, both in terms of optics and style .
  • some elements so directly visible can not be modified. This is particularly the case of the light sources used and in particular incandescent lamps used for signaling functions, which may be amber or red.
  • the bulb of the lamp is thus colored, or a colored mask is placed in front of a colorless bulb lamp to obtain the desired color of the signaling beam.
  • the bulb or the colored mask for a signaling function constitutes a color spot in a set. otherwise consists almost exclusively of colorless reflecting surfaces, which may pose stylists with problems integrating signaling functions near lighting functions.
  • a deflector panel consisting of parallel blades inclined at 45 ° and reflecting on their two faces.
  • Such a baffle board is intended to avoid cases where the light source is off and where the ambient ambient lighting, natural or artificial, is arranged in such a way or at such an intensity that it can reveal lighting or signaling as if their light source was on.
  • the light rays coming from the external light source penetrating the device of lighting or signaling through the ice are reflected by the reflector and may emerge from the lighting or signaling device giving the illusion that the lighting or signaling function has been activated by the driver of the vehicle including an observer sees the lighting or signaling device.
  • the deflector panel is intended to constitute a light trap for the external light, and avoid the disadvantages above.
  • the light source is placed at the focus of a parabolic mirror, and the closure glass is provided with an optical network of prisms and striations to ensure the spatial distribution, both horizontally and vertically, of the emerging beam, so that the deflector panel is invisible or very little visible through the closing glass, as was the light source before the interposition of the deflector panel.
  • the document FR 687 984 also shows such a device.
  • the present invention is placed in this context and its purpose is to provide a lighting or signaling device using a smooth or weakly deviating closing glass, and wherein the light source is invisible directly from the outside whatever the position of an observer in relation to the lighting or signaling device, while ensuring the emission of a lighting or signaling beam in every respect regulations, and from which emanate only light rays emitted by the light source made invisible directly, such a lighting or signaling device in addition to adapt to the requirements of stylists, be simple to assemble, reliable operation and little expensive.
  • the subject of the invention is therefore a lighting or signaling device, in particular for a motor vehicle, comprising a light source and a reflector for forming a lighting or signaling light beam along an optical axis, a closing window being arranged in front of the light source, non-deflecting or weakly deflecting elements being disposed in front of the light source for transmitting the light rays forming the lighting or signaling beam by making them undergo a translation substantially perpendicular to their direction of propagation.
  • the closure glass is smooth or weakly deviating, and the non-deflecting or weakly deflecting elements form a mask preventing the light source from being seen through the closure glass while allowing the emission of a beam of light. lighting or signaling along the optical axis of the device, the non-deflecting elements or weakly deflecting successive being non-parallel to each other.
  • the term “front” of a lighting or signaling device is the direction in which the emerging light beam is emitted, and “back” in the opposite direction.
  • FIG. 1 shows a reflector mirror 10 whose surface is such that the light rays emitted by a light source 12 (not shown in FIG. Figure 1 ) and reflected by this reflector form an X'-X optical axis beam whose spatial extent and photometric distribution form a lighting or signaling beam corresponding to the regulations concerning this beam.
  • the deflector panel 20 In front of the reflector 10 is a deflector panel, designated together by the reference 20.
  • the deflector panel 20 consists of a plurality of lamellae 22 located between two planes perpendicular to the axis X'-X.
  • a closure glass 30 In front of the deflector panel 20 there is arranged a closure glass 30 ( Figure 3 ), smooth or weakly deviating, so without significant influence on the formation of the lighting or signaling beam.
  • the strips 22 are arranged in a star around the optical axis X'-X.
  • the slats 22 have two substantially planar faces and form isosceles triangles, whose apex is located on the axis X'-X, or isosceles trapezes whose small base is located on the side of the optical axis X'-X.
  • the lamellae 22 are metallized on their two faces, for example by aluminizing, and they are inclined by about 45 ° relative to a plane perpendicular to the axis X'-X.
  • the size of this translation depends on the distance between the facing faces of two adjacent lamellae. Thus, the translation will be greater in the vicinity of the outer periphery of the deflector panel 20 than near its center, located on the optical axis X'-X.
  • the projection P of the rear edge 22 A, R of the front face 22 A of a strip, in a direction parallel to the optical axis X'-X on the adjacent strip, is located behind the front edge 22 R, A of the rear face 22 R of the adjacent lamella.
  • the whole beam formed after reflection on the reflector 10 has thus been rotated about the axis X'-X, a small value, and depending on the angle between two successive lamellae.
  • the deflector panel having 36 lamellae the angle between two adjacent lamellae is 10 ° if the lamellae are blades with flat and parallel faces.
  • the whole beam is thus rotated about 10 ° after passing through the deflector panel 20.
  • FIG. 4 represents by a set of curves isocandela the shape of the signaling beam provided by the light source 12 and the reflector 10, in the absence of baffle board, these elements providing a city lamp regulatory beam.
  • the resulting beam is relatively symmetrical with respect to the horizontal and the vertical.
  • the Figure 5 represents the beam obtained with the same light source cooperating with the same reflector as for the Figure 4 but with interposition of the deflector screen 20 in front of the light source. It can be seen that the light beam has slightly expanded, and that it has a horizontal as well as vertical dissymmetry, the whole beam having rotated about 10 ° to the left relative to that of the beam. Figure 4 . However, such a beam remains entirely in accordance with the regulations in force.
  • the deflection panel 40 consists of lamellae 42 arranged concentrically around the axis X'-X.
  • the lamellae 42 are in the form of truncated cones, with the same axis coinciding with the optical axis X'-X of the reflector 10, and of the same conicity, equal to approximately 45 °.
  • the lamellae 42 are metallized on both their faces, for example by aluminizing.
  • the projection P 'of the rear edge 42 A, R of the front face 42 A of a blade, in a direction parallel to the optical axis X'- X on the adjacent lamella, is situated behind the front edge 42 R, A of the rear face 42 R of the adjacent lamella.
  • the operation of the deflector panel is easily deduced from that of the first embodiment.
  • the light rays all undergo a translation in a radial direction relative to the optical axis X'-X.
  • the whole beam formed after reflection on the reflector 10 has therefore undergone an expansion of a low value, and depending on the distance between two successive lamellae.
  • the slats are advantageously chosen so that they have increasing diameters, from the smallest to the outermost, in arithmetic progression. This will result in an emerging beam wider and higher than the one is formed by the sole action of the light source and the reflector, but which is still in accordance with regulatory photometry.
  • a lighting or signaling device has thus been made in accordance with the present invention in which the light source is invisible directly from the outside whatever the position of an observer relative to the lighting or signaling device, then no light beam from the source can pass through the deflector panel without having been translated.
  • the presence of the source can sometimes be guessed, for example if its bulb is colored, through multiple reflections.
  • the photometry of the beam emerging from the deflector panel is affected only to a very small extent, however insufficient to make it non-compliant with the regulations.
  • the slats are flat as in the first embodiment, or curves as in the second, intervene only through their reflective faces. It can therefore be expected that these strips are thick, are spaced a length equal to or close to their thickness, and are made of a transparent material, as shown on the Figure 9 .
  • the metallization of a face of such a thick lamella will make this reflecting face for the rays incident on it as well from outside the lamella as from inside the lamella.
  • These thick slats may in turn be embedded, by overmoulding, in a block of transparent material. This amounts to making reflecting slats on both sides, these slats having an infinitely small thickness.
  • the reflecting faces instead of being metallized, are obtained as the result of total reflections on the inside of lamellae 22 or 42 made of transparent material, embedded in a transparent material, the two materials having refraction chosen to achieve such a result.
  • Such strips will then have the form of prisms, rectilinear or curvilinear.
  • the present invention is not limited to the embodiments that have been described, but the skilled person may instead make many changes that fall within its scope.
  • the slats may have a shape other than star or truncated cones, depending on the desired effect. They may for example be in the form of squares of the same centers, truncated cones oval base, or any closed geometric shapes, nested one inside the other, the slats each having a slope, with respect to the axis X'-X optical, about 45 °.

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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 (7)

  1. Beleuchtungs- oder Signalgebungsvorrichtung, insbesondere für Kraftfahrzeuge, mit einer Lichtquelle (12) und einem Reflektor (10) zum Bilden eines Beleuchtungs- oder Signallichtbündels längs einer optischen Achse (X'-X), wobei eine Abschlussscheibe (30) vor der Lichtquelle (12) angeordnet ist, wobei nicht oder gering ablenkende Elemente (22, 42) vor der Lichtquelle (12) angeordnet sind, um die das Beleuchtungs- oder Signallichtbündel bildenden Lichtstrahlen unter Aufbringung einer zu ihrer Ausbreitungsrichtung im Wesentlichen rechtwinkligen Verlagerung durchzulassen, wobei die Abschlussscheibe (30) glatt oder gering ablenkend ist,
    dadurch gekennzeichnet, dass die nicht oder gering ablenkenden Elemente (22, 42) eine Blende (20, 40) bilden, die verhindert, das die Lichtquelle (12) durch die Abschlussscheibe (30) hindurch sichtbar ist, dabei aber die Abgabe eines Beleuchtungs- oder Signallichtbündels längs der optischen Achse (X'-X) der Vorrichtung erlaubt, wobei die aufeinander folgenden nicht oder gering ablenkenden Elemente (22, 42) zueinander nicht parallel sind, und dass die nicht oder gering ablenkenden Elemente (22, 42) von Paaren sich gegenüberliegender Reflexionselemente gebildet sind, wobei diese Reflexionselemente durch Metallisierung der beiden ebenen und dünnen Lamellenseiten erzielt werden, wobei diese Lamellen sternförmig um die optische Achse (X'-X) herum angeordnet sind.
  2. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, dass die Projektion (P) des hinteren Rands (22A,R, 42A,R) der Vorderseite (22A, 42A) eines Reflexionselements in einer Richtung parallel zur optischen Achse (X'-X) auf das benachbarte Reflexionselement hinter dem vorderen Rand (22R,A, 42R,A) der Rückseite (22R, 42R) des benachbarten Reflexionselements liegt.
  3. Vorrichtung nach Anspruch 2,
    dadurch gekennzeichnet, dass die ebenen Lamellen die Form gleichschenkliger Dreiecke oder Trapeze haben.
  4. Vorrichtung nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass die Lamellen (22, 42) in einem Block (50) aus lichtdurchlässigem Material mit parallelen und zur optischen Achse (X'-X) lotrechten Seiten (52, 54) eingebettet sind.
  5. Vorrichtung nach Anspruch 2,
    dadurch gekennzeichnet, dass die Lamellen (22, 42) dick sind und aus einem lichtdurchlässigen Material realisiert sind, wobei ihre Dicke im Wesentlichen dem Abstand zwischen zwei benachbarten Lamellen entspricht.
  6. Vorrichtung nach Anspruch 5,
    dadurch gekennzeichnet, dass die dicken Lamellen (22, 42) in einem Block (50) aus lichtdurchlässigem Material mit parallelen und zur optischen Achse (X'-X) lotrechten Seiten (52, 54) eingebettet sind.
  7. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, dass die Paare sich gegenüberliegender Reflexionselemente Prismenflächen sind, auf denen eine Totalreflexion der auf diesen auftreffenden Lichtstrahlen erfolgt.
EP02291917A 2001-08-31 2002-07-29 Beleuchtungs- oder Signalvorrichtung für ein Kraftfahrzeug mit verbessertem Aussehen Expired - Lifetime EP1288565B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0111636A FR2829227B1 (fr) 2001-08-31 2001-08-31 Dispositif d'eclairage ou de signalisation d'aspect ameliore pour vehicule automobile
FR0111636 2001-08-31

Publications (2)

Publication Number Publication Date
EP1288565A1 EP1288565A1 (de) 2003-03-05
EP1288565B1 true EP1288565B1 (de) 2010-09-15

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EP02291917A Expired - Lifetime EP1288565B1 (de) 2001-08-31 2002-07-29 Beleuchtungs- oder Signalvorrichtung für ein Kraftfahrzeug mit verbessertem Aussehen

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Country Link
EP (1) EP1288565B1 (de)
AT (1) ATE481602T1 (de)
DE (1) DE60237662D1 (de)
FR (1) FR2829227B1 (de)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR655089A (fr) * 1927-10-14 1929-04-15 Perfectionnements aux appareils d'éclairage tels que les phares de véhicules automobiles
FR687984A (fr) * 1930-01-10 1930-08-18 écran diffusant pour sources lumineuses
FR765694A (fr) * 1932-12-16 1934-06-14 Perfectionnements aux lampes ou aux phares
FR2487041A1 (fr) 1980-07-17 1982-01-22 Seima Dispositif d'eclairage et de signalisation, notamment pour vehicules automobiles
FR2501336B1 (fr) * 1981-03-09 1986-02-28 Cibie Projecteurs Ensemble d'emission de lumiere pour vehicules automobiles
FR2784448B1 (fr) * 1998-10-13 2000-11-24 Axo Scintex Cie Equip Automobi Diffuseur, notamment de feux de signalisation de vehicules
US6048081A (en) * 1998-06-15 2000-04-11 Richardson; Brian Edward Beam divergence and shape controlling module for projected light

Also Published As

Publication number Publication date
ATE481602T1 (de) 2010-10-15
FR2829227A1 (fr) 2003-03-07
EP1288565A1 (de) 2003-03-05
DE60237662D1 (de) 2010-10-28
FR2829227B1 (fr) 2004-08-13

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