EP1039215B1 - Verbesserte Kraftfahrzeugleuchte mit mehreren Lichtquellen - Google Patents

Verbesserte Kraftfahrzeugleuchte mit mehreren Lichtquellen Download PDF

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Publication number
EP1039215B1
EP1039215B1 EP00400377A EP00400377A EP1039215B1 EP 1039215 B1 EP1039215 B1 EP 1039215B1 EP 00400377 A EP00400377 A EP 00400377A EP 00400377 A EP00400377 A EP 00400377A EP 1039215 B1 EP1039215 B1 EP 1039215B1
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EP
European Patent Office
Prior art keywords
indicator light
light according
domes
light
sources
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
EP00400377A
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English (en)
French (fr)
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EP1039215A1 (de
Inventor
Jean Paul Charret
Jean Claude Gasquet
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
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP1039215A1 publication Critical patent/EP1039215A1/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
    • 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
    • F21S43/26—Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
    • 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
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]

Definitions

  • the present invention relates generally to multi-source signal lights for motor vehicles, and in particular to lights having as a light source a distributed set of light-emitting diodes.
  • such a light-emitting diode (LED) signaling light has, in association with each LED, an optics capable of distributing the light emitted by the LED in a given illumination field.
  • An advantage of this type of fire is that its off aspect can be completely colorless, the LEDs emitting directly radiation (red, amber or color white regulatory).
  • the documents FR 2 707 223 A and FR 2 711 215 A describe signaling lamps of this type, each LED being associated with an individual miniature reflector for recovering the radiation emitted by the LED with a steep inclination with respect to its main direction. 'program.
  • Optical arrangements such as Fresnel lenses are also provided at the right of each LED to collimate its radiation in the main direction of emission, generally parallel to the longitudinal axis of the vehicle.
  • the spatial distribution of the light at the output of these Fresnel lenses, intended to fill the regulatory photometric grid, is ensured for example by an external screen having a spherical or toric shot, or by other optical elements provided on the optical part. carrying the Fresnel lenses.
  • a difficulty with this type of known fire is that, if we consider an elementary subset consisting of an LED, its recuperator and its optical, this subset illuminates a certain area of the photometric grid, but not optimally.
  • this subset illuminates a certain area of the photometric grid, but not optimally.
  • the homogeneous and complete filling of the regulatory lighting field of the fire requires the use of a large number of LEDs.
  • the illuminating surface observable at the outer surface of the fire indicator will be relatively indefinite and variable, which is undesirable.
  • the present invention proposes to overcome these limitations of the state of the art, and aims to provide a multiple LED signaling light which on the one hand can have a relatively small number of LEDs, and on the other hand offers the observer, in any position thereof at least in the regulatory illumination field of the light function considered, the vision of the light generated by each of these LEDs, this in order to obtain in all circumstances the impression of a homogeneous matrix fire of well-defined contours.
  • Another object of the invention is to obtain, together with such optical properties, a signaling light which has, both on and off, a new aspect particularly interesting for stylists.
  • the present invention proposes a signaling light for a motor vehicle, comprising a plurality of light sources such as light-emitting diodes and means for optically processing the light from the sources to generate a signaling beam in an illuminating range of given range.
  • said processing means comprising an optical processing element at the right of each of said sources, and an optical indicator substantially optically inactive, characterized in that each optical processing element is constituted by an individual balloon able to perform a distribution. light received throughout the illuminating range, said individual balloons being mounted to the right of openings formed in a support.
  • FIGS. 1 and 2 there is shown partially an optical cell of a signaling light according to the invention, this cell comprising a light-emitting diode (LED) whose substantially parallelepipedal housing 10 has on one side the source proper 11, of main transmission axis xx and a substantially hemispherical hollow balloon 20 for optical processing of the light from the LED.
  • LED light-emitting diode
  • This balloon 20 preferably made of colorless transparent molded plastic, is intended to perform a spatial distribution of this light so as to fill in a controlled manner the photometric grid imposed by the specifications and regulations, depending on the type of fire (position, stop, recoil, flashing, fog, ).
  • the outer face of this balloon is smooth, and its inner face has a plurality of individual facets 21 for performing the aforementioned distribution.
  • the light distribution dioptres are formed on the outside of the balloon 20, or both on the inside and on the outside of the balloon.
  • these diopters are formed by projection of cylindrical type patterns, parabolic, possibly combined with a prismatic function, in a manner well known to those skilled in the art.
  • one of the faces of the balloon to deal with the distribution of light in a given first direction, for example a vertical direction
  • the other face of the balloon to deal with the distribution of light in the orthogonal direction, in this case horizontal.
  • Figure 2 illustrates in more detail the case where the balloon 20 is, as indicated above, smooth on its outer face 22 and provided with facets 21 on its inner face. It is interesting to observe here that the facets 21 are joined to each other by flanking surfaces 211 which have the property of being also, at least for some, optically active (see radius R1).
  • the number of such cells in a traffic light is chosen mainly according to the light power available at each LED, knowing that advances in technology now allow LEDs to be more and more powerful. Thus, for a fire made today with 25-watt filament lamps (including stop and flashing lights), regulatory minimums can be reached with a fire with 10 to 15 LEDs.
  • Figure 3 schematically illustrates a fire according to the invention, comprising three rows of four cells, and illustrates one of these rows.
  • This fire has a housing or pedestal 30 closed at the front by a transparent 40, advantageously smooth and colorless to give the fire a "showcase" aspect particularly sought after today by stylists.
  • the LEDs 10 are electrically powered from a common support 12 (or by independent supports), and are received in an optical mounting and recovery plate 50, fixed inside the fire by means not shown. More specifically, this plate has a set of conical cavities 51 having at their bottom a respective opening 55 of dimension adapted to the LED, in which it is mounted from the rear.
  • This plate 50 is advantageously designed so as to be reflective (for example by a method of vacuum metallization), so that the conical surfaces of the cavities 51 recover the light emitted by the respective LEDs with an inclination greater than half the angle at top of the cone, to straighten this light towards the main direction of emission xx.
  • each conical cavity is surmounted by an annular shoulder 52 on which is supported and is fixed (for example by gluing or ultrasonic welding the associated balloon 20.
  • the plate 50 also has, between the different optical cells each consisting of an LED, the conical cavity 51 and the associated balloon 20, a curved style wall 53, which follows the curve of the transparent 40, at a small distance determined. inside of it. Finally, the plate 50 has other conical recesses 54 extending between the shoulders 52 and the wall 53, to give said plate its structural continuity. The half-angle at the apex of the conical portions 54 is chosen so as not to obscure the light at the outlet of the respective balloons 20, so as not to alter the photometry. In addition, and as shown in FIG.
  • the shape and the depth of the conical recesses 54 are chosen here on the one hand so that the optical cells have optical axes xx which are all parallel to each other; that is, the shoulders 52 extend in planes parallel to each other, and on the other hand so that the tops of the balloons 20 are substantially flush with the imaginary extensions of the outer face of the wall of the wall. style 53 at their level.
  • a signaling light according to the invention can easily be adapted, by playing in particular on the curve of the wall 53 and on the distribution of the light cells in the extent of this wall, in all imposed configurations. in terms of dimensions, contours, curvature, ... traffic light.
  • FIG. 5 shows a variant embodiment of the balloon 20, according to which its internal face is always provided with facets 21 for distributing the light, and its external face 22 also comprises, in the vicinity of the base of the balloon, a plurality of grooves 221 extending along circular paths in planes perpendicular to xx.
  • Such streaks can contribute to the homogeneity of the light distribution, especially in the extreme zones of the illuminating surface. They can also be adopted for style reasons.
  • the plate 50 or at least its style wall 53, not with a neutral reflective appearance, but with a chosen color, for example that of the vehicle body. This can be achieved either by making the plate with a plastic material dyed in the mass, or by painting.
  • the color of the radiation at the exit of the light is also possible for the color of the radiation at the exit of the light to be given by any combination of the color as emitted by the LEDs, of any hue of the balloons 20 and of any hue of the transparency 40.
  • each balloon 20 may optionally be made in two parts juxtaposed and each having its own light distribution dioptres, especially if the demoulding constraints impose.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Claims (17)

  1. Signalleuchte für Kraftfahrzeuge, mit einer Vielzahl von Lichtquellen (10) wie etwa Leuchtdioden und Mitteln (20) zur optischen Verarbeitung des von den Lichtquellen abgegebenen Lichts zum Erzeugen eines Signallichtbündels in einer Leuchtfläche mit gegebener Ausdehnung, wobei diese Verarbeitungsmittel rechtwinklig zu jeder der Lichtquellen ein optisches Verarbeitungselement (20) umfassen, und mit einer optisch betrachtet im Wesentlichen inaktiven äußeren Sichtscheibe (40),
    dadurch gekennzeichnet, dass jedes optische Verarbeitungselement (20) durch einen eigenen Ballon gebildet ist, der eine Verteilung des empfangenen Lichts über die gesamte Ausdehnung der Leuchtfläche vorzunehmen vermag, wobei die einzelnen Ballons über Öffnungen (55) montiert sind, die in einer Halterung (50) ausgebildet sind.
  2. Signalleuchte nach Anspruch 1,
    dadurch gekennzeichnet, dass die Ballons (20) allgemein eine hohle halbkugelige Form haben, wobei ihre konkave Seite der jeweiligen Lichtquelle zugewandt ist.
  3. Signalleuchte nach Anspruch 2,
    dadurch gekennzeichnet, dass die Ballons (20) alle die gleiche Größe haben.
  4. Signalleuchte nach einem der Ansprüche 1 bis 3,
    dadurch gekennzeichnet, dass die Ballons (20) alle identisch sind.
  5. Signalleuchte nach einem der Ansprüche 1 bis 4,
    dadurch gekennzeichnet, dass jeder Ballon (20) eine Innenseite hat, die mit einer Vielzahl von Lichtverteilungsfacetten (21, 211) versehen ist.
  6. Signalleuchte nach Anspruch 5,
    dadurch gekennzeichnet, dass jeder Ballon (20) eine glatte Außenseite (22) hat.
  7. Signalleuchte nach Anspruch 5,
    dadurch gekennzeichnet, dass jeder Ballon (20) eine teilweise glatte (22) und teilweise gerippte (221) Außenseite besitzt.
  8. Signalleuchte nach einem der Ansprüche 1 bis 7,
    dadurch gekennzeichnet, dass die Halterung durch eine gemeinsame Trag- und Zierplatte (50) ist, die eine Vielzahl von Aufnahmen (55) für die Lichtquellen und eine Vielzahl von Montageflächen (52) für die Ballons (20) aufweist.
  9. Signalleuchte nach Anspruch 8,
    dadurch gekennzeichnet, dass die gemeinsame Platte undurchsichtig ist.
  10. Signalleuchte nach einem der Ansprüche 8 oder 9,
    dadurch gekennzeichnet, dass die gemeinsame Platte (50) zwischen den Aufnahmen (55) und den Montageflächen (52) allgemein konische Lichtstromrekuperatoren (51) bildet.
  11. Signalleuchte nach einem der Ansprüche 8 bis 10,
    dadurch gekennzeichnet, dass die Montageflächen (52) ringförmige Flächen sind, die am Boden einer Vielzahl von Aussparungen (54) vorgesehen sind, die sich von einer der gemeinsamen Platte (50) zugehörigen Zierwand (53) aus erstrecken.
  12. Signalleuchte nach Anspruch 11,
    dadurch gekennzeichnet, dass die Sichtscheibe (40) gewölbt ist und die Zierwand (53) ebenfalls gewölbt ist, um sich der Sichtscheibe im Wesentlichen anzupassen.
  13. Signalleuchte nach einem der Ansprüche 10 oder 11,
    dadurch gekennzeichnet, dass sich die ringförmigen Montageflächen (52) in zueinander parallelen Ebenen erstrecken.
  14. Signalleuchte nach einem der Ansprüche 10 bis 13,
    dadurch gekennzeichnet, dass die ringförmigen Montageflächen (52) bezüglich der Zierwand (53) derart positioniert sind, dass die Scheitelpunkte der Ballons (20) mit den gedachten Verlängerungen der Zierwand in Höhe der Ausnehmungen auf einem Niveau sind.
  15. Signalleuchte nach einem der Ansprüche 1 bis 14,
    dadurch gekennzeichnet, dass die Ballons (20) und die Sichtscheibe (40) farblos sind.
  16. Signalleuchte nach Anspruch 15,
    dadurch gekennzeichnet, dass die Lichtquellen (10) eine farbige Strahlung aussenden.
  17. Signalleuchte nach einem der Ansprüche 1 bis 15,
    dadurch gekennzeichnet, dass die Ballons (20), von vorne betrachtet, eine Fläche belegen, die kleiner als etwa die Hälfte der Fläche der Leuchte ist.
EP00400377A 1999-03-19 2000-02-10 Verbesserte Kraftfahrzeugleuchte mit mehreren Lichtquellen Expired - Lifetime EP1039215B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9903443 1999-03-19
FR9903443A FR2791121B1 (fr) 1999-03-19 1999-03-19 Feu de signalisation multi-sources perfectionne pour vehicule automobile

Publications (2)

Publication Number Publication Date
EP1039215A1 EP1039215A1 (de) 2000-09-27
EP1039215B1 true EP1039215B1 (de) 2006-10-25

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EP00400377A Expired - Lifetime EP1039215B1 (de) 1999-03-19 2000-02-10 Verbesserte Kraftfahrzeugleuchte mit mehreren Lichtquellen

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EP (1) EP1039215B1 (de)
DE (1) DE60031469T2 (de)
ES (1) ES2274769T3 (de)
FR (1) FR2791121B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10060489A1 (de) * 2000-12-08 2002-06-13 Hella Kg Hueck & Co Leuchte für Fahrzeuge

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3916875A1 (de) * 1989-05-24 1990-12-06 Ullmann Ulo Werk Signalleuchte, insbesondere mehrkammersignalleuchte fuer kraftfahrzeuge
FR2707223B1 (fr) 1993-07-07 1995-09-29 Valeo Vision Feu de signalisation perfectionné à diodes électroluminescentes.
FR2711215B1 (fr) 1993-10-13 1996-01-05 Valeo Vision Feu de signalisation à plusieurs sources et à plaque intermédiaire de traitement optique pour véhicule automobile.

Also Published As

Publication number Publication date
EP1039215A1 (de) 2000-09-27
DE60031469T2 (de) 2007-08-23
DE60031469D1 (de) 2006-12-07
FR2791121B1 (fr) 2001-06-08
FR2791121A1 (fr) 2000-09-22
ES2274769T3 (es) 2007-06-01

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