EP1033526B1 - Lamp, in particular for motor vehicles - Google Patents

Lamp, in particular for motor vehicles Download PDF

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Publication number
EP1033526B1
EP1033526B1 EP00103468A EP00103468A EP1033526B1 EP 1033526 B1 EP1033526 B1 EP 1033526B1 EP 00103468 A EP00103468 A EP 00103468A EP 00103468 A EP00103468 A EP 00103468A EP 1033526 B1 EP1033526 B1 EP 1033526B1
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EP
European Patent Office
Prior art keywords
light
inclination
lighting according
conducting rod
axis
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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
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EP00103468A
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German (de)
French (fr)
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EP1033526A2 (en
EP1033526A3 (en
Inventor
Oliver Hering
Reiner Lendle
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Valeo Beleuchtung Deutschland GmbH
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Valeo Beleuchtung Deutschland GmbH
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Publication of EP1033526A3 publication Critical patent/EP1033526A3/en
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    • 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
    • F21S43/237—Light guides characterised by the shape of the light guide rod-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
    • F21S43/242—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

Definitions

  • the invention relates to a luminaire, in particular for motor vehicles, having the features of the preamble of claim 1.
  • Luminaires with Lichtleitstäben are well known.
  • a signal light for motor vehicles has become known, in which a plurality of Lichtleitstäbe are provided in a parallel arrangement to each other.
  • this Lichtleitstäbe light is irradiated by means of a light emitting diode at one end face, which is distributed over the length of the Lichtleitstabes.
  • On the opposite side of the light exit surface of the light guide rod is provided with a plurality of prisms, at which the light beams are deflected in the direction of the light exit surface.
  • lamps are also known in which, although parallel juxtaposed Lichtleitstäbe be used, but in which the light entry surfaces are not in a plane, but are laterally offset, since this is required by the shape of the lamp.
  • the individual light sources can not be attached to a common board, as this would then be designed step-shaped.
  • the individual light sources are therefore each mounted on a separate board, and the luminaire housing must be provided for each board with a receptacle or holder for the board. This embodiment is both constructive and expensive in terms of installation effort and thus costly.
  • a light with a light rod which has two end-side light entry surfaces and a light exit surface, and two light sources are provided, wherein the light entrance surface is inclined relative to a surface perpendicular to the longitudinal axis of the light guide rod.
  • US-A-5,434,754 and US-A-5,711,592 each disclose a luminaire having a light guide rod, a light entry surface, a light exit surface and a light source.
  • the invention has for its object to provide a lamp that is structurally simple and quick to install.
  • the light guide rods are indeed be arranged parallel to each other, the light entry surfaces, however, not in a plane but stepped offset from each other.
  • the luminaire according to the invention can be used as a signal light, as an interior light module, as a vehicle boundary light or as a vehicle lighting application.
  • the geometric arrangement of the Lichtleitstäbe require a non-planar arrangement of the light exit surfaces and a simple structure is proposed, which allows the recording and contacting of the Lichtleitstäben associated light sources in a plane and thus, for example, allows the use of a simple board.
  • the axis of the light cone of the light source and / or the central axis of the light source is inclined relative to the longitudinal axis of the light guide rod. In this way, a further possibility is created to change the course of the light rays within the light guide rod. In this possibility, however, the direction of the incident on the light entrance surface rays is changed due to the inclination of the light source.
  • the inclination of the light entry surface and the inclination of the light source are selected so that the light rays within the light guide rod at least as run as in conventional Lichtleitstäben that are illuminated normally.
  • the board on which the light source or the light sources are located can also be arranged inclined.
  • the light entry surfaces of all Lichtleitstäbe lie in a plane perpendicular to the rod longitudinal axis.
  • the ends of the Lichtleitstäbe can follow the inclination of the board, so that due to this orientation of the Lichtleitstäbe eg Trapezoidal tail lights can be optimally illuminated without having to use a separate board for each individual light source.
  • the inclination directions of the light entry surfaces and the axis of the light cone of the light sources with respect to the longitudinal axis of the light guide rod are opposite to each other. Is e.g. the light entrance surface inclined to the right, then the associated light source is inclined to the left. This causes the light rays within the Lichtleitstabes experience little or no change in direction.
  • the invention thus provides an arrangement of one or more light guide rods, wherein an embodiment of the respective light entry surfaces is proposed, which allows to arrange the light sources associated with the light guide rods in a plane, so as to e.g. to get along with a single, flat board.
  • a plurality of coupling surfaces e.g. on the opposite side, can be proceeded on the same principle.
  • the light entry surfaces of the adjacently arranged light guide rods form a kind of sawtooth profile. This is due to the fact that the direction of the inclination of the light entry surfaces is opposite to the direction of the inclination of the light sources.
  • Fig. 1 three generally designated 10 Lichtleitstäbe are shown, wherein the Lichtleitstäbe 10 are arranged one above the other and each having a light entry surface 12 which is provided at one end face. Facing the observer, the Lichtleitstäbe 10 each have a light exit surface 14, which are behind a trapezoidal lamp glass 16, which is shown only schematically by dashed lines.
  • the light entry surfaces 12 are each associated with a light source 18, which is embodied by a light emitting diode 20.
  • These light emitting diodes 20 are arranged on a single board 22, wherein the board 22 is arranged inclined relative to the vertical direction by the angle ⁇ . In this case, the board 22 extends approximately parallel to the adjacent side edge 24 of the lamp 16.
  • the LEDs 20 each radiate the associated light entry surface 12 of the respective Lichtleitstabes 10th on, wherein the light entry surface 12 is also inclined.
  • the inclination direction runs opposite to the direction of inclination of the board 22.
  • the light entry surfaces 12 are thus inclined by the angle ⁇ relative to the vertical.
  • the light beams of the light-emitting diodes 20, which are radiated, for example, conically are refracted at the light entry surface 12 in such a way that the cone axis 32 of the light cone runs essentially parallel to the longitudinal axis 30 of the light guide rod 10.
  • the beam path within the light guide rods 10 is similar to that when the light guide rods 10 are illuminated at vertical light entry surfaces 12 with light sources 18 arranged parallel thereto.
  • the position of the Lichtleitstäbe 10 can be changed in such a way, in particular the Lichtleitstäbe 10 can be moved parallel to each other so that not only rectangular but also parallelogram and trapezoidal lights 16 can be optimally illuminated.
  • the light rays 26 (FIG. 2) emitted by the light-emitting diode 20 and extending within the light-conducting rod 10 are distributed uniformly over the entire length of the light-conducting rod 10 and are refracted in such a way that they are opposite to the light emergence surface 14
  • Side provided prisms 28 impinge and are deflected from there in the direction of the light exit surface 14.
  • the individual LEDs 20 can be mounted on a single board 22, in particular soldered, so that only a single board 22 is required, which can be mounted relatively quickly or replaced if necessary. Stepped boards or triangular support base for the light sources 18 are therefore no longer required.

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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)
  • Planar Illumination Modules (AREA)

Description

Die Erfindung betrifft eine Leuchte, insbesondere für Kraftfahrzeuge, mit den Merkmalen des Oberbegriffs des Anspruchs 1.The invention relates to a luminaire, in particular for motor vehicles, having the features of the preamble of claim 1.

Leuchten mit Lichtleitstäben sind hinreichend bekannt. So ist z.B. aus der DE-A-41 29 094 eine Signalleuchte für Kraftfahrzeuge bekannt geworden, in welcher mehrere Lichtleitstäbe in paralleler Anordnung zueinander vorgesehen sind. In diese Lichtleitstäbe wird mittels einer Leuchtdiode am einen stirnseitigen Ende Licht eingestrahlt, welches sich über die Länge des Lichtleitstabes verteilt. Auf der der Lichtaustrittsfläche gegenüberliegenden Seite ist der Lichtleitstab mit einer Vielzahl von Prismen versehen, an denen die Lichtstrahlen in Richtung der Lichtaustrittsfläche umgelenkt werden.Luminaires with Lichtleitstäben are well known. For example, e.g. From DE-A-41 29 094 a signal light for motor vehicles has become known, in which a plurality of Lichtleitstäbe are provided in a parallel arrangement to each other. In this Lichtleitstäbe light is irradiated by means of a light emitting diode at one end face, which is distributed over the length of the Lichtleitstabes. On the opposite side of the light exit surface of the light guide rod is provided with a plurality of prisms, at which the light beams are deflected in the direction of the light exit surface.

Es hat sich gezeigt, dass insbesondere bei parallel nebeneinander angeordneten Lichtleitstäben darauf geachtet werden muss, dass die Lichteintrittsflächen in einer Ebene liegen. Dann können nämlich die einzelnen Lichtquellen, insbesondere die Leuchtdioden, auf einer gemeinsamen Leiterplatte angeordnet werden, wodurch der konstruktive und Montageaufwand auf ein Minimum reduziert werden.It has been found that, in particular with light guide rods arranged parallel to one another, care must be taken that the light entry surfaces lie in one plane. Then, namely, the individual light sources, in particular the light-emitting diodes, can be arranged on a common printed circuit board, whereby the constructive and assembly costs are reduced to a minimum.

Es sind jedoch auch Leuchten bekannt, bei denen zwar parallel nebeneinander angeordnete Lichtleitstäbe eingesetzt werden, bei denen die Lichteintrittsflächen jedoch nicht in einer Ebene liegen, sondern seitlich versetzt sind, da dies von der Form der Leuchte gefordert wird. Bei diesen Leuchten, z.B. mit trapezförmigem oder parallelogrammförmigem Leuchtenglas, können die einzelnen Lichtquellen nicht an einer gemeinsamen Platine befestigt werden, da diese dann stufenförmig ausgeführt sein müsste. Die einzelnen Lichtquellen werden daher jeweils auf einer eigenen Platine befestigt, und das Leuchtengehäuse muss für jede Platine mit einer Aufnahme bzw. Halterung für die Platine versehen werden. Diese Ausgestaltung ist sowohl konstruktiv als auch hinsichtlich des Montageaufwandes aufwendig und damit auch kostenintensiv.However, lamps are also known in which, although parallel juxtaposed Lichtleitstäbe be used, but in which the light entry surfaces are not in a plane, but are laterally offset, since this is required by the shape of the lamp. In these luminaires, e.g. with trapezoidal or parallelogram shaped glass, the individual light sources can not be attached to a common board, as this would then be designed step-shaped. The individual light sources are therefore each mounted on a separate board, and the luminaire housing must be provided for each board with a receptacle or holder for the board. This embodiment is both constructive and expensive in terms of installation effort and thus costly.

Aus der nächstkommenden CH-A-475 508 ist eine Leuchte mit einem Lichtstab bekannt, der zwei stirnseitige Lichteintrittsflächen und eine Lichtaustrittsfläche aufweist, und zwei Lichtquellen vorgesehen sind, wobei die Lichteintrittsfläche gegenüber einer Fläche senkrecht zu der Längsachse des Lichtleitstabes geneigt ist. Die US-A-5,434,754 und die US-A-5,711,592 offenbaren jeweils eine Leuchte mit einem Lichtleitstab, einer Lichteintrittsfläche, einer Lichtaustrittsfläche und einer Lichtquelle.From the closest CH-A-475 508 a light with a light rod is known, which has two end-side light entry surfaces and a light exit surface, and two light sources are provided, wherein the light entrance surface is inclined relative to a surface perpendicular to the longitudinal axis of the light guide rod. US-A-5,434,754 and US-A-5,711,592 each disclose a luminaire having a light guide rod, a light entry surface, a light exit surface and a light source.

Der Erfindung liegt die Aufgabe zugrunde, eine Leuchte bereitzustellen, die konstruktiv einfach und schnell zu montieren ist. Insbesondere sollen die Lichtleitstäbe zwar parallel zueinander angeordnet sein, die Lichteintrittsflächen jedoch nicht in einer Ebene sondern stufenförmig versetzt zueinander liegen.The invention has for its object to provide a lamp that is structurally simple and quick to install. In particular, the light guide rods are indeed be arranged parallel to each other, the light entry surfaces, however, not in a plane but stepped offset from each other.

Diese Aufgabe wird mit einer Leuchte gelöst, die die Merkmale des Anspruchs 1 aufweist.This object is achieved with a luminaire having the features of claim 1.

Durch die Neigung der Lichteintrittsfläche des Lichtstabes gegenüber dessen Längsachse wird bewirkt, dass die auf die Lichteintrittsfläche auftreffenden Lichtstrahlen nicht nur gebrochen sondern die gebrochenen Strahlen auch in Neigungsrichtung zusätzlich abgelenkt werden. Mit anderen Worten bedeutet dies, dass die von der Lichtquelle ausgehenden Lichtstrahlen aufgrund der Neigung der Lichteintrittsfläche zusätzlich in diese Neigungsrichtung abgelenkt werden. Hierdurch kann gezielt in den Strahlenverlauf der Lichtstrahlen innerhalb des Lichtleitstabes eingegriffen werden. Die erfindungsgemäße Leuchte kann als Signalleuchte, als Innenlichtmodul, als Fahrzeugbegrenzungsleuchte oder als Fahrzeugbeleuchtungsanwendung verwendet werden.Due to the inclination of the light entry surface of the light rod with respect to its longitudinal axis is caused that the incident light rays on the light entrance surface not only broken but the refracted rays are also deflected in the direction of inclination. In other words, this means that the light beams emanating from the light source are additionally deflected in this direction of inclination due to the inclination of the light entry surface. As a result, it is possible to intervene in the beam path of the light beams within the light guide rod. The luminaire according to the invention can be used as a signal light, as an interior light module, as a vehicle boundary light or as a vehicle lighting application.

Bei der oben genannten Leuchte bedingen die geometrische Anordnung der Lichtleitstäbe eine nicht ebene Anordnung der Lichtaustrittsflächen und es wird ein einfacher Aufbau vorgeschlagen, der die Aufnahme und die Kontaktierung der den Lichtleitstäben zugeordneten Lichtquellen in einer Ebene ermöglicht und somit z.B. die Nutzung einer einfachen Platine erlaubt. Dies führt dazu, dass der Aufbau trotzdem konstruktiv einfach und die Leuchte schnell zu montieren und kostengünstig ist.In the above-mentioned luminaire, the geometric arrangement of the Lichtleitstäbe require a non-planar arrangement of the light exit surfaces and a simple structure is proposed, which allows the recording and contacting of the Lichtleitstäben associated light sources in a plane and thus, for example, allows the use of a simple board. This leads to the construction nevertheless constructive easy and quick to assemble the lamp and is inexpensive.

Bei einer Weiterbildung ist vorgesehen, dass die Achse des Lichtkegels der Lichtquelle und/oder die Zentralachse der Lichtquelle gegenüber der Längsachse des Lichtleitstabes geneigt ist. Auf diese Weise wird eine weitere Möglichkeit geschaffen, den Verlauf der Lichtstrahlen innerhalb des Lichtleitstabes zu verändern. Bei dieser Möglichkeit wird jedoch aufgrund der Neigung der Lichtquelle die Richtung der auf die Lichteintrittsfläche auftreffenden Strahlen verändert.In a further development, it is provided that the axis of the light cone of the light source and / or the central axis of the light source is inclined relative to the longitudinal axis of the light guide rod. In this way, a further possibility is created to change the course of the light rays within the light guide rod. In this possibility, however, the direction of the incident on the light entrance surface rays is changed due to the inclination of the light source.

Bei einer bevorzugten Ausführungsform ist vorgesehen, dass die Neigung der Lichteintrittsfläche und die Neigung der Lichtquelle so gewählt sind, dass die Lichtstrahlen innerhalb des Lichtleitstabes wenigstens so verlaufen wie bei herkömmlichen Lichtleitstäben, die normal angestrahlt werden. Auf diese Weise kann die Lichtquelle geneigt, d.h. schräg angeordnet werden, wobei der Verlauf der Lichtstrahlen innerhalb des Lichtleitstabes durch die Neigung der Lichteintrittsfläche korrigiert wird. Aufgrund der Neigung der Lichtquellen kann jedoch auch die Platine, auf der sich die Lichtquelle bzw. die Lichtquellen befinden, geneigt angeordnet sein. Somit ist es nicht erforderlich, dass die Lichteintrittsflächen aller Lichtleitstäbe in einer Ebene senkrecht zur Stablängsachse liegen. Vielmehr können die Enden der Lichtleitstäbe der Neigung der Platine folgen, so dass aufgrund dieser Ausrichtung der Lichtleitstäbe z.B. auch trapezförmige Heckleuchten optimal ausgeleuchtet werden können, ohne dass für jede einzelne Lichtquelle eine separate Platine verwendet werden muss.In a preferred embodiment it is provided that the inclination of the light entry surface and the inclination of the light source are selected so that the light rays within the light guide rod at least as run as in conventional Lichtleitstäben that are illuminated normally. In this way, the light source inclined, that are arranged obliquely, wherein the course of the light rays is corrected within the Lichtleitstabes by the inclination of the light entry surface. Due to the inclination of the light sources, however, the board on which the light source or the light sources are located can also be arranged inclined. Thus, it is not necessary that the light entry surfaces of all Lichtleitstäbe lie in a plane perpendicular to the rod longitudinal axis. Rather, the ends of the Lichtleitstäbe can follow the inclination of the board, so that due to this orientation of the Lichtleitstäbe eg Trapezoidal tail lights can be optimally illuminated without having to use a separate board for each individual light source.

Bevorzugt sind die Neigungsrichtungen der Lichteintrittsflächen und der Achse des Lichtkegels der Lichtquellen gegenüber der Längsachse des Lichtleitstabes einander entgegengesetzt. Ist z.B. die Lichteintrittsfläche nach rechts geneigt, dann ist die zugehörige Lichtquelle nach links geneigt. Hierdurch wird bewirkt, dass die Lichtstrahlen innerhalb des Lichtleitstabes keine oder nur geringfügige Richtungsänderungen erfahren.Preferably, the inclination directions of the light entry surfaces and the axis of the light cone of the light sources with respect to the longitudinal axis of the light guide rod are opposite to each other. Is e.g. the light entrance surface inclined to the right, then the associated light source is inclined to the left. This causes the light rays within the Lichtleitstabes experience little or no change in direction.

Die Erfindung sieht also eine Anordnung von ein oder mehreren Lichtleitstäben vor, wobei eine Ausgestaltung der jeweiligen Lichteintrittsflächen vorgeschlagen wird, die es erlaubt, die den Lichtleitstäben zugeordneten Lichtquellen in einer Ebene anzuordnen, um so z.B. mit einer einzigen, ebenen Platine auszukommen. Besitzen die einzelnen Lichtleitstäbe mehrere Einkoppelflächen, z.B. auf der gegenüberliegenden Seite, kann nach dem gleichen Prinzip verfahren werden.The invention thus provides an arrangement of one or more light guide rods, wherein an embodiment of the respective light entry surfaces is proposed, which allows to arrange the light sources associated with the light guide rods in a plane, so as to e.g. to get along with a single, flat board. Do the individual Lichtleitstäbe a plurality of coupling surfaces, e.g. on the opposite side, can be proceeded on the same principle.

Bei einem Ausführungsbeispiel ist vorgesehen, dass die Lichteintrittsflächen der nebeneinander angeordneten Lichtleitstäbe eine Art Sägezahnprofil bilden. Dies ist dadurch bedingt, dass die Richtung der Neigung der Lichteintrittsflächen entgegen der Richtung der Neigung der Lichtquellen ist.In one embodiment, it is provided that the light entry surfaces of the adjacently arranged light guide rods form a kind of sawtooth profile. This is due to the fact that the direction of the inclination of the light entry surfaces is opposite to the direction of the inclination of the light sources.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus den Unteransprüchen sowie der nachfolgenden Beschreibung, in der unter Bezugnahme auf die Zeichnung ein besonders bevorzugtes Ausführungsbeispiel im einzelnen beschrieben ist. Dabei zeigen:

Fig. 1:
eine Seitenansicht auf mehrere nebeneinander angeordnete Lichtleitstäbe hinter einem andeutungsweise dargestellten, trapezförmigen Leuchtenglas;
Fig. 2:
einen Schnitt II-II durch den untersten Lichtleitstab gemäss Fig. 1.
Further advantages, features and details of the invention will become apparent from the subclaims and the following description in which a particularly preferred embodiment is described in detail with reference to the drawings. Showing:
Fig. 1:
a side view on several side by side arranged Lichtleitstäbe behind a hinted, trapezoidal lamp glass;
Fig. 2:
a section II-II through the lowermost Lichtleitstab according to FIG. 1st

In der Fig. 1 sind drei insgesamt mit 10 bezeichnete Lichtleitstäbe dargestellt, wobei die Lichtleitstäbe 10 übereinander angeordnet sind und jeweils eine Lichteintrittsfläche 12 aufweisen, die am einen stirnseitigen Ende vorgesehen ist. Dem Betrachter zugewandt, weisen die Lichtleitstäbe 10 jeweils eine Lichtaustrittsfläche 14 auf, die sich hinter einem trapezförmigen Leuchtenglas 16, welches mit gestrichelten Linien lediglich andeutungsweise dargestellt ist, befinden. Den Lichteintrittsflächen 12 zugeordnet sind jeweils eine Lichtquelle 18, die von einer Leuchtdiode 20 verkörpert wird. Diese Leuchtdioden 20 sind auf einer einzigen Platine 22 angeordnet, wobei die Platine 22 gegenüber der Vertikalrichtung um den Winkel α geneigt angeordnet ist. Dabei verläuft die Platine 22 in etwa parallel zur benachbarten Seitenkante 24 des Leuchtenglases 16.In Fig. 1, three generally designated 10 Lichtleitstäbe are shown, wherein the Lichtleitstäbe 10 are arranged one above the other and each having a light entry surface 12 which is provided at one end face. Facing the observer, the Lichtleitstäbe 10 each have a light exit surface 14, which are behind a trapezoidal lamp glass 16, which is shown only schematically by dashed lines. The light entry surfaces 12 are each associated with a light source 18, which is embodied by a light emitting diode 20. These light emitting diodes 20 are arranged on a single board 22, wherein the board 22 is arranged inclined relative to the vertical direction by the angle α. In this case, the board 22 extends approximately parallel to the adjacent side edge 24 of the lamp 16.

Die Leuchtdioden 20 strahlen jeweils die zugeordnete Lichteintrittsfläche 12 des jeweiligen Lichtleitstabes 10 an, wobei die Lichteintrittsfläche 12 ebenfalls geneigt ist. Die Neigungsrichtung verläuft dabei jedoch entgegengesetzt zur Neigungsrichtung der Platine 22. Die Lichteintrittsflächen 12 sind also um den Winkel β gegenüber der Vertikalen geneigt. Dies führt dazu, dass die Lichtstrahlen der Leuchtdioden 20, die z.B. kegelförmig abgestrahlt werden, an der Lichteintrittsfläche 12 derart gebrochen werden, dass die Kegelachse 32 der Lichtkegel im wesentlichen parallel zur Längsachse 30 des Lichtleitstabes 10 verläuft. Dies bedeutet, dass trotz der geneigten Anordnung der Platine 22 der Strahlenverlauf innerhalb der Lichtleitstäbe 10 ähnlich zu dem ist, wie wenn die Lichtleitstäbe 10 bei vertikalen Lichteintrittsflächen 12 mit dazu parallel angeordneten Lichtquellen 18 angestrahlt werden.The LEDs 20 each radiate the associated light entry surface 12 of the respective Lichtleitstabes 10th on, wherein the light entry surface 12 is also inclined. The inclination direction, however, runs opposite to the direction of inclination of the board 22. The light entry surfaces 12 are thus inclined by the angle β relative to the vertical. As a result, the light beams of the light-emitting diodes 20, which are radiated, for example, conically, are refracted at the light entry surface 12 in such a way that the cone axis 32 of the light cone runs essentially parallel to the longitudinal axis 30 of the light guide rod 10. This means that, in spite of the inclined arrangement of the circuit board 22, the beam path within the light guide rods 10 is similar to that when the light guide rods 10 are illuminated at vertical light entry surfaces 12 with light sources 18 arranged parallel thereto.

Auf diese Weise kann die Lage der Lichtleitstäbe 10 derart geändert werden, insbesondere können die Lichtleitstäbe 10 derart parallel zueinander verschoben werden, dass nicht nur rechteckförmige sondern auch parallelogrammförmige und trapezförmige Leuchtengläser 16 optimal ausgeleuchtet werden können. Die von der Leuchtdiode 20 ausgesandten und innerhalb des Lichtleitstabes 10 verlaufenden Lichtstrahlen 26 (Fig. 2) werden gleichmässig über die gesamte Länge des Lichtleitstabes 10 verteilt und derart gebrochen, dass sie auf an den der Lichtaustrittsfläche 14 gegenüberliegenden Seite vorgesehene Prismen 28 auftreffen und von dort in Richtung der Lichtaustrittsfläche 14 umgelenkt werden.In this way, the position of the Lichtleitstäbe 10 can be changed in such a way, in particular the Lichtleitstäbe 10 can be moved parallel to each other so that not only rectangular but also parallelogram and trapezoidal lights 16 can be optimally illuminated. The light rays 26 (FIG. 2) emitted by the light-emitting diode 20 and extending within the light-conducting rod 10 are distributed uniformly over the entire length of the light-conducting rod 10 and are refracted in such a way that they are opposite to the light emergence surface 14 Side provided prisms 28 impinge and are deflected from there in the direction of the light exit surface 14.

Bei einer derartigen Anordnung der Lichtleitstäbe 10 können die einzelnen Leuchtdioden 20 auf einer einzigen Platine 22 befestigt, insbesondere aufgelötet, werden, so dass lediglich eine einzige Platine 22 erforderlich ist, die relativ schnell montiert bzw. im Bedarfsfalle ausgewechselt werden kann. Stufenförmige Platinen oder dreieckförmige Haltesockel für die Lichtquellen 18 sind somit nicht mehr erforderlich.In such an arrangement of the Lichtleitstäbe 10, the individual LEDs 20 can be mounted on a single board 22, in particular soldered, so that only a single board 22 is required, which can be mounted relatively quickly or replaced if necessary. Stepped boards or triangular support base for the light sources 18 are therefore no longer required.

Claims (8)

  1. Lighting, especially for motor vehicles, with at least one light-conducting rod (10) which features one or more front-side light inlet surfaces (12) and one or more light outlet surfaces (14), and with one or more light sources (18) designed especially as light-emitting diodes (20), wherein the orthogonal of the light inlet surfaces (12) is inclined with respect to the longitudinal axis (30) of the light-conducting rod (10), characterized in that several light-conducting rods (10) are positioned side by side, wherein the light inlet surfaces (12) of the rods are arranged with respect to each other so that the light sources (18) allocated to the individual light-conducting rods (10) are located in a single plane.
  2. Lighting according to claim 1, characterized in that the axis (32) of the light cone of the light source (18) is inclined with respect to the longitudinal axis (30) of the light-conducting rod (10).
  3. Lighting according to claim 1 and 2, characterized in that the directions of inclination of the orthogonal of the light inlet surfaces (12) and of the axis (32) of the light cone with respect to the longitudinal axis (30) of the light-conducting rod (10) are mutually opposite to each other.
  4. Lighting according to claim 1 and 2, characterized in that the 20 directions of inclination of the orthogonal of the light inlet surfaces (12) and of the axis (32) of the light cone with respect to the longitudinal axis (30) of the light-conducting rod (10) are set equal to each other.
  5. Lighting according to claim 3, characterized in that at an angle of inclination (α) of the axis (32) of the light source, the angle of inclination (β) of the orthogonal of the light inlet surface (12) and its geometric shape are dimensioned so that the angles of the light beams in the light conductor are the same or similar to the angles of light beams resulting from a vertical injection of light into a vertical light inlet surface (12).
  6. Lighting according to one of the preceding claims, characterized in that the light inlet surfaces (12) of the light-conducting rods (10) positioned side by side form a kind of sawtooth profile.
  7. Lighting according to one of the preceding claims, characterized in that the inclined light inlet surface (12) has an arbitrary geometric shape.
  8. Lighting according to one of the preceding clams, characterized in that the cross section of the light-conducting rod (10) is round or rectangular.
EP00103468A 1999-03-02 2000-02-29 Lamp, in particular for motor vehicles Expired - Lifetime EP1033526B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19908961A DE19908961A1 (en) 1999-03-02 1999-03-02 Lights, in particular for motor vehicles
DE19908961 1999-03-02
US09/517,208 US6367957B1 (en) 1999-03-02 2000-03-02 Lighting, especially for motor vehicles

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EP1033526A2 EP1033526A2 (en) 2000-09-06
EP1033526A3 EP1033526A3 (en) 2002-03-13
EP1033526B1 true EP1033526B1 (en) 2007-04-11

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EP (1) EP1033526B1 (en)
DE (1) DE19908961A1 (en)

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Also Published As

Publication number Publication date
EP1033526A2 (en) 2000-09-06
US6367957B1 (en) 2002-04-09
DE19908961A1 (en) 2000-09-07
EP1033526A3 (en) 2002-03-13

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