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EP1176359B1 - Vehicle light - Google Patents

Vehicle light Download PDF

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Publication number
EP1176359B1
EP1176359B1 EP01116161A EP01116161A EP1176359B1 EP 1176359 B1 EP1176359 B1 EP 1176359B1 EP 01116161 A EP01116161 A EP 01116161A EP 01116161 A EP01116161 A EP 01116161A EP 1176359 B1 EP1176359 B1 EP 1176359B1
Authority
EP
European Patent Office
Prior art keywords
light
reflex reflector
emitting means
optical surfaces
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
EP01116161A
Other languages
German (de)
French (fr)
Other versions
EP1176359A3 (en
EP1176359A2 (en
Inventor
Klaus Henneböhle
Heinz-Albert Püttmann
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.)
Hella GmbH and Co KGaA
Original Assignee
Hella KGaA Huek and Co
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 Hella KGaA Huek and Co filed Critical Hella KGaA Huek and Co
Publication of EP1176359A2 publication Critical patent/EP1176359A2/en
Publication of EP1176359A3 publication Critical patent/EP1176359A3/en
Application granted granted Critical
Publication of EP1176359B1 publication Critical patent/EP1176359B1/en
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
    • F21S43/235—Light guides
    • F21S43/249—Light guides with two or more light sources being coupled into the light guide
    • 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]
    • 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
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/239—Light guides characterised by the shape of the light guide plate-shaped
    • 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
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/241—Light guides characterised by the shape of the light guide of complex shape
    • 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
    • F21S43/235—Light guides
    • F21S43/242—Light guides characterised by the emission area
    • F21S43/245—Light guides characterised by the emission area emitting light from one or more of its major surfaces
    • 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

Definitions

  • the invention relates to a luminaire for vehicles according to the preamble of patent claim 1.
  • a luminaire for vehicles is known with a housing containing a light source, which is covered by a cover plate.
  • a plurality of reflector elements existing reflectors are arranged on a side facing the light source side of the lens.
  • the retroreflective elements are arranged in rows, with cylindrical lenses being formed between the retroreflector lines, which form a light passage for the light collected by means of an optical disk arranged between the cover disk and the light source, which light is emitted by the light source. Since the area occupied by the retroreflecting elements of the lens for the passage of the light emitted from the light source omitted, cylinder lenses of the optical disc must be matched to the cylindrical lenses of the lens.
  • a disadvantage of the known lamp that the lamp has a considerable depth as a result of the light emission in succession arranged optics and lens.
  • German patent application 199 46 850.8 is a lamp for vehicles with a formed as a light source and positioned in a housing Lichtabstrahlsch known that emits the light in the light emission direction through a transparent lens.
  • a retro-reflector is oriented with a number of optical surfaces arranged at an angle to one another in the direction of the lens. The retroreflector extends in regions on a housing wall, wherein the light emitted by the Lichtabstrahlstoffsch light is negligible.
  • a disadvantage of the known lamp is that in order to enable the reflector function additional housing surfaces must be provided, which increase the dimension of the lamp, in particular the depth of the same.
  • a luminaire for vehicles is known with a housing in which a plurality of light-emitting diodes and a retroreflector with a number of retroreflective elements are integrated as Lichtabstrahlstoff.
  • the reflecting elements extending in one plane are connected to one another in regions via light passages, wherein the light passages are each arranged at a distance from light-emitting diodes extending in a parallel plane.
  • the light passage is formed as a converging lens which is integrally connected to the adjacent retroreflective elements.
  • a luminaire for vehicles which has a Lichtabstrahlstoff and a transverse to the optical axis of the Lichtabstrahlstoffs light-guiding element to form a high set brake light.
  • the light-guiding element has a plurality of prism elements on a rear side facing the light-emitting means, so that the light emitted by the light-emitting means and coupled into the light-guiding element is radiated into the environment as a result of total reflection by an elongated light-outcoupling surface of the light-guiding element.
  • Object of the present invention is therefore to develop a lamp for vehicles with a light emitting means and a retroreflector receiving housing such that in a simple way the space depth of the lamp is reduced.
  • the invention has the features of claim 1.
  • the particular advantage of the invention is that on the other hand, the space depth of the lamp can be significantly reduced by the functional coupling between the retroreflective elements on the one hand and the Lichtabstrahlschn.
  • the basic idea of the invention is to arrange the light-emitting means in the vicinity of a retroreflective element, wherein the retroreflective element has a light passage for the passage of the light emitted by the light-emitting means. This results in a functional coupling between the retroreflector on the one hand and the Lichtabstrahlstoff on the other.
  • the light-emitting means is arranged in the region of an opening of the retroreflective element such that the light emitted by the light-emitting means is reflected at the optics surfaces of the retroreflective element.
  • the light passage is formed as a light opening, which serves to receive at least a front region of the Lichtabstrahlschs.
  • the space depth of the lamp can be reduced and on the other hand, a better utilization of the optical surfaces to increase the usable luminous flux of the lamp can be achieved.
  • a plurality of distributed retroreflective elements, on the one hand, and light passages corresponding to light-emitting means, on the other hand, are provided.
  • the light-emitting means can be arranged in front of, in or behind the light passage of the retroreflective element.
  • the retroreflective element is arranged coaxially to the light emitting element.
  • a retro-reflective field is disposed in front of a light emission field consisting of a plurality of light emission means in the light emission direction, wherein the reflection field has a plurality of reflection elements arranged in a surface.
  • the reflection function and, on the other hand, the light-emitting function are arranged in two planes spaced apart from each other and extending essentially perpendicular to the optical axis of the light-emitting elements.
  • this makes it possible to realize a homogeneous planar light function on the one hand and a reflection function on the other hand.
  • the retroreflective element is formed from a triple prism with at least three optical surfaces arranged at an obtuse angle to each other, wherein the longitudinal extent of the optical surfaces is substantially greater, preferably two to six times, than the transverse extent of the light transmission and / or Lichtabstrahlschs , Due to the relatively large-volume dimension of such a retroreflective element, in particular the lighting function can be assisted in the arrangement of the light-emitting means in the light opening.
  • a lamp for vehicles usually has a housing, not shown, which is covered in the light emission direction by a cover plate, not shown. Within the housing one or more Lichtabstrahlstoff is arranged in the light emission direction. How out Figure 1 to 3 to see is, the light emitting means may be formed as one or more arranged on a support plate light emitting diode 1. These light-emitting diodes 1 are each positioned in a preferably central receiving opening 2 of a retroreflector element 3.
  • the retroreflective element 3 consists of a triple prism with optical surfaces 4 arranged at an obtuse angle to one another, which are vapor-deposited with a reflective coating.
  • the light-emitting diodes 1 are arranged in such a way to the retroreflective elements 3 that a light head 5 of the light-emitting diode 1 extend almost completely into the space formed by the optical surfaces 4 opening in the light emission direction 6. Due to the relative position of the optical surfaces 4 to the light head 5 on the one hand and due to the size of the optical surfaces 4, they can reflect the emitted from the light emitting diodes 1 by reflection of the optical surfaces 4 Contribute light rays in the light emitting direction 6 to increase the luminous flux of the light emitting diode 1. The fact that the retroreflective elements 3 are oriented coaxially to the luminous head 5, the efficiency of the light source 1 can be further increased.
  • the optical surfaces 4 are oriented relative to one another such that the light incident parallel to the optical axis of the light-emitting diode 1 is reflected back into its direction of incidence after multiple reflection.
  • a plurality of light emitting diodes 1 are arranged distributed, which have a small transverse extent compared to the retroreflective elements 3, the styling of the lamp is characterized by a plurality of retroreflective elements 3 having reflectors 7. Due to the direct contact of the LEDs 1 at the apex of the retroreflective elements 3, the lamp can be realized with a relatively small component depth.
  • the housing may have a front in the light emission direction 6 remindstrahlerfeld 8 and Having in the light emission direction 6 past light emission field 9.
  • the retro-reflecting field 8 is arranged at a distance from the light-emitting field 9 and between the light-emitting field 9 on the one hand and a transparent cover lens 10 on the other hand.
  • the retro-reflecting field 8 is arranged like a checkerboard, with reflecting elements 11 alternating with light passages 12.
  • the retroreflective elements 11 are - as in the previous embodiment - formed by triple prisms, which reflect the incident light back from the environment in parallel.
  • the light passages 12 are transparent and substantially planar, so that the light of a respective light passage associated light emitting diode 13 in the light emitting 6 can pass through the light passage 12 is substantially unaffected.
  • the light passage 12 is integrally connected to the retroreflective elements 11.
  • the retroreflector 14 thus formed is preferably made of a transparent plastic material, wherein the retroreflective elements 11 are mirrored on a side facing the lens 10 by means of a reflective coating.
  • the retro-reflecting field 8 and the light-emitting field 9 are regularly provided with retroreflective elements 11 or LEDs 13, a homogeneous styling of the lamp can be realized.
  • a retroreflector field 15 can be formed from a plurality of reflector elements 16 arranged in the manner of a frame and a central strip 17 of light passages 18 in comparison with the previously described reflection field.
  • the light-emitting means can also be designed as one or more incandescent lamps 19 whose emitted light beams 20 are reflected by a reflector 21 in the direction of the light passage 18.
  • the Light passages 18 are disposed adjacent to each other so that the light is emitted in the form of a stripe.
  • a retro-reflecting field 22 can be formed by a plurality of reflecting elements 23 on the one hand and by light guides 24 as light emitting means on the other hand.
  • the optical waveguide 24 may be integrally connected to the retro-reflecting field 22 and extends as an extension of the retro-reflecting field 22 on a side of the retro-reflecting field 22 facing away from the lens 25 in the direction of a light source 26 designed as a light-emitting diode.
  • the light-emitting diode 26 is arranged at the free end of the light guide 24 so that the light rays 27 emitted by the light-emitting diode 26 are totally reflected on the lateral surfaces of the light guide 24 until they emerge at an end facing the lens 25.
  • FIGS. 8 and 9 illustrated embodiment of a light guide 28 this is positioned in a receiving opening 29 of the retro-reflecting field 22.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

The lamp is designed so that a number of reflector elements (3) is respectively assigned a light radiation means (1) and the reflector element (3) is connected working in conjunction with one at least, light passage extending in the plane of the reflector element (3).

Description

Die Erfindung betrifft eine Leuchte für Fahrzeuge nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a luminaire for vehicles according to the preamble of patent claim 1.

Aus der DE 90 02 245 U1 ist eine Leuchte für Fahrzeuge bekannt mit einem eine Lichtquelle enthaltenden Gehäuse, das durch eine Abschlussscheibe abgedeckt ist. Auf einer der Lichtquelle zugewandten Seite der Abschlussscheibe ist ein aus mehreren Rückstrahlerelementen bestehender Rückstrahler angeordnet. Diese dienen dazu, dass das aus der Umgebung auf die Abschlussscheibe treffende Licht total reflektiert wird. Die Rückstrahlerelemente sind zeilenweise angeordnet, wobei zwischen den Rückstrahlerzeilen Zylinderlinsen ausgebildet sind, die einen Lichtdurchlass bilden für das mittels einer zwischen der Abschlussscheibe und der Lichtquelle angeordneten Optikscheibe gesammelte Licht, das von der Lichtquelle emittiert wird. Da die durch die Rückstrahlerelemente eingenommene Fläche der Abschlussscheibe für den Durchtritt des von der Lichtquelle emittierten Lichtes wegfällt, müssen Zylinderlinsen der Optikscheibe zu den Zylinderlinsen der Abschlussscheibe aufeinander abgestimmt sein.From the DE 90 02 245 U1 a luminaire for vehicles is known with a housing containing a light source, which is covered by a cover plate. On a side facing the light source side of the lens is arranged a plurality of reflector elements existing reflectors. These serve to totally reflect the light striking the lens from the environment. The retroreflective elements are arranged in rows, with cylindrical lenses being formed between the retroreflector lines, which form a light passage for the light collected by means of an optical disk arranged between the cover disk and the light source, which light is emitted by the light source. Since the area occupied by the retroreflecting elements of the lens for the passage of the light emitted from the light source omitted, cylinder lenses of the optical disc must be matched to the cylindrical lenses of the lens.

Nachteilig an der bekannten Leuchte ist, dass die Leuchte infolge der in Lichtabstrahlrichtung hintereinander angeordneten Optik- und Abschlussscheibe eine erhebliche Bautiefe aufweist.A disadvantage of the known lamp, that the lamp has a considerable depth as a result of the light emission in succession arranged optics and lens.

Aus der nicht vorveröffentlichten deutschen Patentanmeldung 199 46 850.8 ist eine Leuchte für Fahrzeuge mit einem als Lichtquelle ausgebildeten und in einem Gehäuse positionierten Lichtabstrahlmittel bekannt, das das Licht in Lichtabstrahlrichtung durch eine transparente Abschlussscheibe emittiert. Zur Totalreflexion des aus der Umgebung eintretenden Lichtes ist ein Rückstrahler mit einer Anzahl von in einem Winkel zueinander angeordneten Optikflächen in Richtung der Abschlussscheibe orientiert. Der Rückstrahler erstreckt sich bereichsweise an einer Gehäusewandung, wobei das von dem Lichtabstrahlmittel emittierte Licht unwesentlich beeinflusst wird.From the not previously published German patent application 199 46 850.8 is a lamp for vehicles with a formed as a light source and positioned in a housing Lichtabstrahlmittel known that emits the light in the light emission direction through a transparent lens. For total reflection of the light entering from the surroundings, a retro-reflector is oriented with a number of optical surfaces arranged at an angle to one another in the direction of the lens. The retroreflector extends in regions on a housing wall, wherein the light emitted by the Lichtabstrahlmittel light is negligible.

Nachteilig an der bekannten Leuchte ist, dass zur Ermöglichung der Rückstrahlerfunktion zusätzliche Gehäuseflächen bereitgestellt sein müssen, die die Dimension der Leuchte, insbesondere die Bautiefe derselben, erhöhen.A disadvantage of the known lamp is that in order to enable the reflector function additional housing surfaces must be provided, which increase the dimension of the lamp, in particular the depth of the same.

Aus der DE 34 38 154 C2 ist eine Leuchte für Fahrzeuge mit einem Gehäuse bekannt, in dem als Lichtabstrahlmittel eine Mehrzahl von Leuchtdioden und ein Rückstrahler mit einer Anzahl von Rückstrahlelementen integriert sind. Die in einer Ebene sich erstreckenden Rückstrahlelemente sind bereichsweise über Lichtdurchlässe miteinander verbunden, wobei die Lichtdurchlässe jeweils in einem Abstand zu in einer parallelen Ebene verlaufenden Leuchtdioden angeordnet sind. Der Lichtdurchlass ist als eine Sammellinse ausgebildet, die einstückig mit den benachbarten Rückstrahlelementen verbunden ist. Nachteilig an der bekannten Leuchte ist, dass aufgrund des erforderlichen Abstandes zwischen der Leuchtdiode und der Sammellinse die Leuchte eine relativ große Bauraumtiefe aufweist.From the DE 34 38 154 C2 a luminaire for vehicles is known with a housing in which a plurality of light-emitting diodes and a retroreflector with a number of retroreflective elements are integrated as Lichtabstrahlmittel. The reflecting elements extending in one plane are connected to one another in regions via light passages, wherein the light passages are each arranged at a distance from light-emitting diodes extending in a parallel plane. The light passage is formed as a converging lens which is integrally connected to the adjacent retroreflective elements. A disadvantage of the known lamp, that due to the required distance between the light emitting diode and the converging lens, the lamp has a relatively large space depth.

Aus der WO 99 09349 A1 ist eine Leuchte für Fahrzeuge bekannt, die ein Lichtabstrahlmittel sowie ein quer zur optischen Achse des Lichtabstrahlmittels verlaufendes Lichtleitelement aufweist zur Bildung einer hoch gesetzten Bremsleuchte. Das Lichtleitelement weist auf einer dem Lichtabstrahlmittel zugewandten Rückseite eine Mehrzahl von Prismenelementen auf, so dass das von den Lichtabstrahlmitteln ausgesandte und in das Lichtleitelement eingekoppelte Licht infolge Totalreflexion durch eine langgestreckte Lichtauskoppelfläche des Lichtleitelementes in die Umgebung abgestrahlt wird.From the WO 99 09349 A1 a luminaire for vehicles is known, which has a Lichtabstrahlmittel and a transverse to the optical axis of the Lichtabstrahlmittels light-guiding element to form a high set brake light. The light-guiding element has a plurality of prism elements on a rear side facing the light-emitting means, so that the light emitted by the light-emitting means and coupled into the light-guiding element is radiated into the environment as a result of total reflection by an elongated light-outcoupling surface of the light-guiding element.

Aufgabe der vorliegenden Erfindung ist es daher, eine Leuchte für Fahrzeuge mit einem ein Lichtabstrahlmittel und einen Rückstrahler aufnehmenden Gehäuse derart weiterzubilden, dass auf einfache Weise die Bauraumtiefe der Leuchte verringert wird.Object of the present invention is therefore to develop a lamp for vehicles with a light emitting means and a retroreflector receiving housing such that in a simple way the space depth of the lamp is reduced.

Zur Lösung diese Aufgabe weist die Erfindung die Merkmale des Patenanspruchs 1 auf.To solve this problem, the invention has the features of claim 1.

Der besondere Vorteil der Erfindung besteht darin, dass durch die funktionale Kopplung zwischen den Rückstrahlelementen einerseits und den Lichtabstrahlmitteln andererseits die Bauraumtiefe der Leuchte wesentlich reduziert werden kann. Grundgedanke der Erfindung ist es, das Lichtabstrahlmittel in der Nähe eines Rückstrahlelementes anzuordnen, wobei das Rückstrahlelement einen Lichtdurchlass für den Durchtritt des von dem Lichtabstrahlmittel emittierten Lichtes aufweist. Es ergibt sich hierdurch eine funktionale Kopplung zwischen dem Rückstrahler einerseits und dem Lichtabstrahlmittel andererseits.The particular advantage of the invention is that on the other hand, the space depth of the lamp can be significantly reduced by the functional coupling between the retroreflective elements on the one hand and the Lichtabstrahlmitteln. The basic idea of the invention is to arrange the light-emitting means in the vicinity of a retroreflective element, wherein the retroreflective element has a light passage for the passage of the light emitted by the light-emitting means. This results in a functional coupling between the retroreflector on the one hand and the Lichtabstrahlmittel on the other.

Nach der Erfindung ist das Lichtabstrahlmittel derart im Bereich einer Öffnung des Rückstrahlelementes angeordnet, dass das von dem Lichtabstrahlmittel ausgesandte Licht an den Optikflächen des Rückstrahlelementes reflektiert wird. Durch die Nutzung der Optikflächen zur Reflexion der von dem Lichtabstrahlmittel ausgesandten Lichtstrahlen kann vorteilhaft der Lichtstrom der Leuchtfunktion vergrößert werden.According to the invention, the light-emitting means is arranged in the region of an opening of the retroreflective element such that the light emitted by the light-emitting means is reflected at the optics surfaces of the retroreflective element. By using the optics surfaces for reflection of the light beams emitted by the light emission means, the luminous flux of the luminous function can advantageously be increased.

Nach der Erfindung ist der Lichtdurchlass als eine Lichtöffnung ausgebildet, die zur Aufnahme zumindest eines vorderen Bereiches des Lichtabstrahlmittels dient. Auf diese Weise kann zum einen die Bauraumtiefe der Leuchte reduziert werden und zum anderen eine bessere Ausnutzung der Optikflächen zur Erhöhung des nutzbaren Lichtstroms der Leuchte erzielt werden.According to the invention, the light passage is formed as a light opening, which serves to receive at least a front region of the Lichtabstrahlmittels. In this way, on the one hand the space depth of the lamp can be reduced and on the other hand, a better utilization of the optical surfaces to increase the usable luminous flux of the lamp can be achieved.

Nach einer besonderen Ausführungsform der Erfindung sind eine Mehrzahl von verteilt angeordneten Rückstrahlelementen einerseits und korrespondierend zu Lichtabstrahlmitteln angeordneten Lichtdurchlässen andererseits vorgesehen. Auf diese Weise kann sowohl eine flächenhafte Leuchtfunktion als auch eine flächenhafte Rückstrahlfunktion erzeugt werden. Dabei kann das Lichtabstrahlmittel vor, in oder hinter dem Lichtdurchlass des Rückstrahlelementes angeordnet sein.According to a particular embodiment of the invention, a plurality of distributed retroreflective elements, on the one hand, and light passages corresponding to light-emitting means, on the other hand, are provided. In this way, both a planar lighting function and a planar retroreflective function can be generated. In this case, the light-emitting means can be arranged in front of, in or behind the light passage of the retroreflective element.

Nach einer Weiterbildung der Erfindung ist das Rückstrahlelement koaxial zum Lichtabstrahlelement angeordnet. Hierdurch wird ein regelmäßiger und harmonischer stilistischer Effekt der Leuchte beim Betrachter erzielt.According to a development of the invention, the retroreflective element is arranged coaxially to the light emitting element. As a result, a regular and harmonious stylistic effect of the lamp is achieved in the viewer.

Nach einer Weiterbildung der Erfindung ist ein Rückstrahlfeld einem in Lichtabstrahlrichtung vor einem aus mehreren Lichtabstrahlmitteln bestehendes Lichtabstrahlfeld vorgelagert, wobei das Rückstrahlfelddas eine Mehrzahl von in einer Fläche angeordneter Rückstrahlelemente aufweist. Hierdurch sind zum einen die Rückstrahlfunktion und zum anderen die Lichtabstrahlfunktion in zwei voneinander beabstandeten und im Wesentlichen senkrecht zur optischen Achse der Lichtabstrahlelemente verlaufenden Ebenen angeordnet. Vorteilhaft kann hierdurch eine homogene flächenhafte Lichtfunktion einerseits und Rückstrahlfunktion andererseits realisiert werden.According to a development of the invention, a retro-reflective field is disposed in front of a light emission field consisting of a plurality of light emission means in the light emission direction, wherein the reflection field has a plurality of reflection elements arranged in a surface. As a result, on the one hand, the reflection function and, on the other hand, the light-emitting function are arranged in two planes spaced apart from each other and extending essentially perpendicular to the optical axis of the light-emitting elements. Advantageously, this makes it possible to realize a homogeneous planar light function on the one hand and a reflection function on the other hand.

Nach einer Weiterbildung der Erfindung ist das Rückstrahlelement aus einem Tripelprisma mit zumindest drei jeweils in einem stumpfen Winkel zueinander angeordneten Optikflächen ausgebildet, wobei die Längserstreckung der Optikflächen wesentlich größer ist, vorzugsweise das zwei- bis sechsfache, als die Quererstreckung des Lichtdurchlasses und/oder des Lichtabstrahlmittels. Durch die relativ großvolumige Dimension eines solchen Rückstrahlelementes kann insbesondere die Leuchtfunktion bei Anordnung des Lichtabstrahlmittels in der Lichtöffnung unterstützt werden.According to a development of the invention, the retroreflective element is formed from a triple prism with at least three optical surfaces arranged at an obtuse angle to each other, wherein the longitudinal extent of the optical surfaces is substantially greater, preferably two to six times, than the transverse extent of the light transmission and / or Lichtabstrahlmittels , Due to the relatively large-volume dimension of such a retroreflective element, in particular the lighting function can be assisted in the arrangement of the light-emitting means in the light opening.

Ausführungsbeispiele der Erfindung werden nachfolgend anhand der Zeichnungen näher erläutert.Embodiments of the invention are explained below with reference to the drawings.

Es zeigen:

Figur 1
eine perspektivische Darstellung eines mit einer Lichtquelle gekop- pelten Rückstrahlelementes,
Figur 2
eine Vorderansicht eines Rückstrahlers mit in einer Lichtöffnung ei- nes Rückstrahlelementes gelagerten Lichtquellen,
Figur 3
eine perspektivische Vorderansicht des Rückstrahlers gemäß Figur 2,
Figur 4
eine Vorderansicht eines Rückstrahlerfeldes mit einem in Lichtab- strahlrichtung hinter dem Rückstrahlerfeld angeordneten Lichtab- strahlfeld,
Figur 5
einen Schnitt entlang der Linie V-V gemäß Figur 4,
Figur 6
eine Vorderansicht eines Rückstrahlerfeldes gemäß einer weiteren Ausführungsform,
Figur 7
einen Schnitt entlang der Linie VII-VII gemäß Figur 6,
Figur 8
eine Vorderansicht eines Rückstrahlerfeldes nach einem weiteren Ausführungsbeispiel, wobei ein Lichtabstrahlmittel durch einen Licht- leiter gebildet ist und
Figur 9
einen Schnitt entlang der Linie IX-IX gemäß Figur 8.
Show it:
FIG. 1
3 is a perspective view of a retroreflective element coupled to a light source;
FIG. 2
a front view of a retroreflector with stored in a light aperture of a retroreflective light sources,
FIG. 3
a front perspective view of the retroreflector according to FIG. 2 .
FIG. 4
FIG. 2 a front view of a retro-reflector field with a light-emitting field arranged in the light emission direction behind the reflector field, FIG.
FIG. 5
a section along the line VV according to FIG. 4 .
FIG. 6
a front view of a reflector panel according to another embodiment,
FIG. 7
a section along the line VII-VII according to FIG. 6 .
FIG. 8
a front view of a retroreflector field according to another embodiment, wherein a Lichtabstrahlmittel is formed by a light guide and
FIG. 9
a section along the line IX-IX according to FIG. 8 ,

Eine Leuchte für Fahrzeuge weist üblicherweise ein nicht dargestelltes Gehäuse auf, das in Lichtabstrahlrichtung durch eine nicht dargestellte Abschlussscheibe abgedeckt ist. Innerhalb des Gehäuses ist in Lichtabstrahlrichtung ein oder mehrere Lichtabstrahlmittel angeordnet. Wie aus Figur 1 bis 3 zu ersehen ist, kann das Lichtabstrahlmittel als eine oder mehrere auf einer Trägerplatte angeordnete Leuchtdiode 1 ausgebildet sein. Diese Leuchtdioden 1 sind jeweils in einer vorzugsweise mittleren Aufnahmeöffnung 2 eines Rückstrahlelementes 3 positioniert. Das Rückstrahlelement 3 besteht aus einem Tripelprisma mit in einem stumpfen Winkel zueinander angeordneten Optikflächen 4, die mit einer reflektierenden Beschichtung bedampft sind. Die Leuchtdioden 1 sind derart zu den Rückstrahlelementen 3 angeordnet, dass ein Leuchtkopf 5 der Leuchtdiode 1 annähernd vollständig in den durch die sich in Lichtabstrahlrichtung 6 sich öffnenden Optikflächen 4 gebildeten Raum erstrecken. Die Optikflächen 4 sind in ihrer Längserstreckung um das zwei- bis sechsfache Länger ausgebildet als die Quererstreckung des Leuchtkopfes 5. Aufgrund der Relativlage der Optikflächen 4 zu dem Leuchtkopf 5 einerseits und aufgrund der Größe der Optikflächen 4 können sie durch Reflexion der von den Leuchtdioden 1 emittierten Lichtstrahlen in Lichtabstrahlrichtung 6 zur Erhöhung des Lichtstromes der Leuchtdiode 1 beitragen. Dadurch, dass die Rückstrahlelemente 3 koaxial zu dem Leuchtkopf 5 orientiert sind, kann der Wirkungsgrad der Lichtquelle 1 weiter erhöht werden.A lamp for vehicles usually has a housing, not shown, which is covered in the light emission direction by a cover plate, not shown. Within the housing one or more Lichtabstrahlmittel is arranged in the light emission direction. How out Figure 1 to 3 to see is, the light emitting means may be formed as one or more arranged on a support plate light emitting diode 1. These light-emitting diodes 1 are each positioned in a preferably central receiving opening 2 of a retroreflector element 3. The retroreflective element 3 consists of a triple prism with optical surfaces 4 arranged at an obtuse angle to one another, which are vapor-deposited with a reflective coating. The light-emitting diodes 1 are arranged in such a way to the retroreflective elements 3 that a light head 5 of the light-emitting diode 1 extend almost completely into the space formed by the optical surfaces 4 opening in the light emission direction 6. Due to the relative position of the optical surfaces 4 to the light head 5 on the one hand and due to the size of the optical surfaces 4, they can reflect the emitted from the light emitting diodes 1 by reflection of the optical surfaces 4 Contribute light rays in the light emitting direction 6 to increase the luminous flux of the light emitting diode 1. The fact that the retroreflective elements 3 are oriented coaxially to the luminous head 5, the efficiency of the light source 1 can be further increased.

Die Optikflächen 4 sind derart zueinander orientiert, dass das parallel zu der optischen Achse der Leuchtdiode 1 einfallende Licht nach einer mehrfachen Reflexion in seine Einfallsrichtung zurückreflektiert wird. Dadurch, dass eine Mehrzahl von Leuchtdioden 1 verteilt angeordnet sind, die im Vergleich zu den Rückstrahlelementen 3 eine geringe Quererstreckung aufweisen, wird das Styling der Leuchte durch den eine Mehrzahl von Rückstrahlelementen 3 aufweisenden Rückstrahler 7 geprägt. Durch die unmittelbare Anlage der Leuchtdioden 1 an den Scheitel der Rückstrahlelemente 3 kann die Leuchte mit einer relativ geringen Bauteiltiefe verwirklicht werden.The optical surfaces 4 are oriented relative to one another such that the light incident parallel to the optical axis of the light-emitting diode 1 is reflected back into its direction of incidence after multiple reflection. Characterized in that a plurality of light emitting diodes 1 are arranged distributed, which have a small transverse extent compared to the retroreflective elements 3, the styling of the lamp is characterized by a plurality of retroreflective elements 3 having reflectors 7. Due to the direct contact of the LEDs 1 at the apex of the retroreflective elements 3, the lamp can be realized with a relatively small component depth.

Nach einer weiteren Ausführungsform einer Leuchte gemäß Figur 4 und 5 kann das Gehäuse ein in Lichtabstrahlrichtung 6 vorderes Rückstrahlerfeld 8 und ein in Lichtabstrahlrichtung 6 zurückliegendes Lichtabstrahlfeld 9 aufweisen. Das Rückstrahlerfeld 8 ist beabstandet zu dem Lichtabstrahlfeld 9 und zwischen dem Lichtabstrahlfeld 9 einerseits und einer transparenten Abschlussscheibe 10 andererseits angeordnet. Das Rückstrahlerfeld 8 ist schachbrettartig angeordnet, wobei sich Rückstrahlelemente 11 mit Lichtdurchlässen 12 abwechseln. Die Rückstrahlelemente 11 werden - wie im vorherigen Ausführungsbeispiel - durch Tripelprismen gebildet, die das einfallende Licht aus der Umgebung parallel zurückreflektieren. Die Lichtdurchlässe 12 sind transparent und im wesentlichen eben ausgebildet, so dass das Licht einer jeweils dem Lichtdurchlass zugeordneten Leuchtdiode 13 in Lichtabstrahlrichtung 6 im wesentlichen unbeeinflusst durch den Lichtdurchlass 12 hindurchtreten kann. Der Lichtdurchlass 12 ist einstückig mit den Rückstrahlelementen 11 verbunden. Der so gebildete Rückstrahler 14 ist vorzugsweise aus einem transparenten Kunststoffmaterial hergestellt, wobei die Rückstrahlelemente 11 auf einer der Abschlussscheibe 10 zugewandten Seite mittels einer reflektierenden Beschichtung verspiegelt sind.According to a further embodiment of a luminaire according to FIGS. 4 and 5 the housing may have a front in the light emission direction 6 Rückstrahlerfeld 8 and Having in the light emission direction 6 past light emission field 9. The retro-reflecting field 8 is arranged at a distance from the light-emitting field 9 and between the light-emitting field 9 on the one hand and a transparent cover lens 10 on the other hand. The retro-reflecting field 8 is arranged like a checkerboard, with reflecting elements 11 alternating with light passages 12. The retroreflective elements 11 are - as in the previous embodiment - formed by triple prisms, which reflect the incident light back from the environment in parallel. The light passages 12 are transparent and substantially planar, so that the light of a respective light passage associated light emitting diode 13 in the light emitting 6 can pass through the light passage 12 is substantially unaffected. The light passage 12 is integrally connected to the retroreflective elements 11. The retroreflector 14 thus formed is preferably made of a transparent plastic material, wherein the retroreflective elements 11 are mirrored on a side facing the lens 10 by means of a reflective coating.

Dadurch, dass das Rückstrahlerfeld 8 und das Lichtabstrahlfeld 9 regelmäßig mit Rückstrahlelementen 11 bzw. Leuchtdioden 13 versehen sind, kann ein homogenes Styling der Leuchte verwirklicht werden. Es erfolgt eine senkrecht zu der Lichtabstrahlrichtung 6 verlaufende vollflächige und gleich verteilte Rückstrahl- und Leuchtfunktion.The fact that the retro-reflecting field 8 and the light-emitting field 9 are regularly provided with retroreflective elements 11 or LEDs 13, a homogeneous styling of the lamp can be realized. There is a perpendicular to the light emission direction 6 extending full-surface and evenly distributed retroreflective and lighting function.

Nach einem weiteren Ausführungsbeispiel gemäß Figur 6 und 7 kann ein Rückstrahlerfeld 15 im Vergleich zum vorherig beschriebenen Rückstrahlerfeld aus einer Mehrzahl von rahmenartig angeordneten Rückstrahlelementen 16 und einem mittleren Streifen 17 von Lichtdurchlässen 18 gebildet sein. Alternativ zu Leuchtdioden kann das Lichtabstrahlmittel auch als eine oder mehrere Glühlampen 19 ausgebildet sein, dessen emittierte Lichtstrahlen 20 durch einen Reflektor 21 in Richtung des Lichtdurchlasses 18 reflektiert werden. Die Lichtdurchlässe 18 sind benachbart zueinander angeordnet, so dass das Licht in Form eines Streifens abgestrahlt wird.According to a further embodiment according to FIGS. 6 and 7 For example, a retroreflector field 15 can be formed from a plurality of reflector elements 16 arranged in the manner of a frame and a central strip 17 of light passages 18 in comparison with the previously described reflection field. As an alternative to light-emitting diodes, the light-emitting means can also be designed as one or more incandescent lamps 19 whose emitted light beams 20 are reflected by a reflector 21 in the direction of the light passage 18. The Light passages 18 are disposed adjacent to each other so that the light is emitted in the form of a stripe.

Nach einem weiteren Ausführungsbeispiel gemäß Figur 8 und 9 kann ein Rückstrahlerfeld 22 - wie in den vorherigen Ausführungsbeispielen beschrieben - durch eine Mehrzahl von Rückstrahlelementen 23 einerseits und durch Lichtleiter 24 als Lichtabstrahlmittel andererseits gebildet sein. Gemäß der linken Seite in Figur 8 und 9 kann der Lichtleiter 24 einstückig mit dem Rückstrahlerfeld 22 verbunden sein und erstreckt sich als Fortsatz des Rückstrahlerfeldes 22 auf einer der Abschlussscheibe 25 abgewandten Seite des Rückstrahlerfeldes 22 in Richtung einer als Leuchtdiode 26 ausgebildeten Lichtquelle. Die Leuchtdiode 26 ist an dem freien Ende des Lichtleiters 24 angeordnet, so dass die von der Leuchtdiode 26 emittierten Lichtstrahlen 27 an den Mantelflächen des Lichtleiters 24 totalreflektiert werden, bis sie an einen der Abschlussscheibe 25 zugewandten Ende austreten.According to a further embodiment according to FIGS. 8 and 9 For example, as is described in the previous exemplary embodiments, a retro-reflecting field 22 can be formed by a plurality of reflecting elements 23 on the one hand and by light guides 24 as light emitting means on the other hand. According to the left side in FIGS. 8 and 9 For example, the optical waveguide 24 may be integrally connected to the retro-reflecting field 22 and extends as an extension of the retro-reflecting field 22 on a side of the retro-reflecting field 22 facing away from the lens 25 in the direction of a light source 26 designed as a light-emitting diode. The light-emitting diode 26 is arranged at the free end of the light guide 24 so that the light rays 27 emitted by the light-emitting diode 26 are totally reflected on the lateral surfaces of the light guide 24 until they emerge at an end facing the lens 25.

Gemäß einer auf der rechten Seite der Figuren 8 und 9 abgebildeten Ausführungsform eines Lichtleiters 28 ist dieser in einer Aufnahmeöffnung 29 des Rückstrahlerfeldes 22 positioniert.According to one on the right side of the FIGS. 8 and 9 illustrated embodiment of a light guide 28, this is positioned in a receiving opening 29 of the retro-reflecting field 22.

Claims (6)

  1. Vehicle lamp with a housing that holds a light-emitting means (1) and a reflex reflector and is covered by a transparent cover lens, wherein, with a number of reflex reflector elements (3) having optical surfaces (4) arranged at an angle relative to each other, the reflex reflector is oriented towards the cover lens such that each light-emitting means (1) is allocated to a number of reflex reflector elements (3) and such that the reflex reflector element (3) is actively connected to a light outlet (12) extending at least in the plane of the reflex reflector element (3), characterized in that the light outlet is constructed as a receptacle opening (2) for holding at least a front region of the light-emitting means (1) and that the light-emitting means (1) is arranged in the region of the receptacle opening (2) such that the light beams emitted from the light-emitting means (1) can be reflected on the optical surfaces (4).
  2. Lamp according to Claim 1, characterized in that a plurality of distributed light outlets (2) and reflex reflector elements (3) is provided, wherein the light-emitting means (1) are arranged in the region of the light outlets (2).
  3. Lamp according to Claim 1 or 2, characterized in that the optical surfaces (4) of the reflex reflector element (3) have a reflective layer and are arranged relative to the optical axis of the light-emitting means (1) such that light that is incident parallel to the optical axis from the surroundings is reflected back in its direction of incidence after multiple reflections.
  4. Lamp according to one of Claims 1 to 3, characterized in that a reflex reflector array (8) is provided with, on one side, a plurality of reflex reflector elements (11) arranged, in the direction of light emission (6), in front of a light-emission array (9) having a plurality of light-emitting means (1) and, on the other side, transparent light outlets (2) arranged corresponding to the light-emitting means.
  5. Lamp according to Claim 4, characterized in that the reflex reflector array (8) is formed integrally with a regular distribution of reflex reflector elements (11) and light outlets (2) in a planar or arc-shaped surface.
  6. Lamp according to one of Claims 1 to 5, characterized in that the reflex reflector element (3) consists of a triple prism with at least three optical surfaces (4) each arranged at an obtuse angle relative to each other, wherein the longitudinal extent of the optical surfaces (4) is greater than two times the transverse extent of the light outlet (2) and/or the light-emitting means (5).
EP01116161A 2000-07-29 2001-07-04 Vehicle light Expired - Lifetime EP1176359B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10037005 2000-07-29
DE10037005A DE10037005A1 (en) 2000-07-29 2000-07-29 Light for vehicles

Publications (3)

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EP1176359A2 EP1176359A2 (en) 2002-01-30
EP1176359A3 EP1176359A3 (en) 2004-10-06
EP1176359B1 true EP1176359B1 (en) 2012-03-21

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EP01116161A Expired - Lifetime EP1176359B1 (en) 2000-07-29 2001-07-04 Vehicle light

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Publication number Priority date Publication date Assignee Title
DE10343840A1 (en) * 2003-09-23 2005-04-28 Hella Kgaa Hueck & Co vehicle light
US7670038B2 (en) 2004-09-20 2010-03-02 Koninklijke Philips Electronics N.V. LED collimator element with an asymmetrical collimator
DE102004061691A1 (en) * 2004-12-22 2006-07-06 Daimlerchrysler Ag Motor vehicle rear light has transparent reflector plate with fitted triple reflectors or prisms, perforated plate with openings associated with gaps between reflectors and between light emitting diodes
DE102004061693A1 (en) * 2004-12-22 2006-07-06 Daimlerchrysler Ag Tail light for motor vehicle, has transparent reflector panel arranged in front of light panel and including reflector triples arranged in strip form and/or linearly, where reflector panel has slight bend opposite to light panel
EP1963736B1 (en) 2005-12-12 2018-09-26 Lumileds Holding B.V. Led collimator element for a vehicle headlight with a low-beam function
CA2643105C (en) * 2006-03-13 2014-04-29 Tir Technology Lp Optical device for mixing and redirecting light
FR2982658A1 (en) * 2011-11-10 2013-05-17 Valeo Vision OPTICAL DEVICE COMPRISING A PLURALITY OF REFLECTIVE FACES
DE102013110839A1 (en) 2013-10-01 2015-04-02 Hella Kgaa Hueck & Co. Lighting device for vehicles
JP6445818B2 (en) 2014-09-19 2018-12-26 株式会社小糸製作所 Vehicle lighting

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AU4272272A (en) * 1971-06-23 1973-11-29 Joseph Lucas (Industries) Limited Combined lens and reflector fora vehicle lamp
DE3438154C2 (en) * 1984-10-18 1994-09-15 Teves Gmbh Alfred Rear lights for motor vehicles
JPH01197141A (en) * 1988-02-02 1989-08-08 Stanley Electric Co Ltd Rear combination lamp for automobile
DE9002245U1 (en) * 1990-02-26 1990-05-03 Hella KG Hueck & Co, 4780 Lippstadt Multi-chamber lamp for motor vehicles
DE19547861A1 (en) * 1995-12-21 1997-06-26 Reitter & Schefenacker Gmbh Rear light for vehicles, preferably motor vehicles
ATE209315T1 (en) 1997-08-12 2001-12-15 Decoma Int Inc DOUBLE REFLECTIVE LENS
DE19852999A1 (en) * 1998-11-17 2000-06-21 Volkswagen Ag Rear light with side optics for vehicles
DE19946850A1 (en) 1999-09-30 2001-04-05 Hella Kg Hueck & Co Lighting equipment for vehicles

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ATE550601T1 (en) 2012-04-15
EP1176359A3 (en) 2004-10-06
DE10037005A1 (en) 2002-02-07
EP1176359A2 (en) 2002-01-30

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