EP1628071A2 - Lighting unit for motor vehicles - Google Patents

Lighting unit for motor vehicles Download PDF

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Publication number
EP1628071A2
EP1628071A2 EP05107120A EP05107120A EP1628071A2 EP 1628071 A2 EP1628071 A2 EP 1628071A2 EP 05107120 A EP05107120 A EP 05107120A EP 05107120 A EP05107120 A EP 05107120A EP 1628071 A2 EP1628071 A2 EP 1628071A2
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EP
European Patent Office
Prior art keywords
light
reflector
lighting unit
segments
unit according
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.)
Granted
Application number
EP05107120A
Other languages
German (de)
French (fr)
Other versions
EP1628071B1 (en
EP1628071A3 (en
Inventor
Jörg Beykirch
Wolfgang Bode
Hans-Peter Brockmeyer
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
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Publication date
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Publication of EP1628071A2 publication Critical patent/EP1628071A2/en
Publication of EP1628071A3 publication Critical patent/EP1628071A3/en
Application granted granted Critical
Publication of EP1628071B1 publication Critical patent/EP1628071B1/en
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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
    • F21S43/40—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the combination of reflectors and refractors
    • 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
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/337—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector having a structured surface, e.g. with facets or corrugations

Definitions

  • the invention relates to a lighting unit for motor vehicles with a light source, with a reflector associated with the light source and with a cover plate covering a front opening of the reflector, wherein the reflector is subdivided into a plurality of reflector segments.
  • a lighting unit for motor vehicles which has a luminaire housing with a light source and a reflector. A light exit opening of the housing is closed by means of a cover. To produce a visual impression, the lighting unit will be operated by means of a plurality of LEDs, a pinhole with a plurality of openings is arranged between the reflector and the cover. By means of the reflector, a parallel light beam impinges on the pinhole, wherein only the part of the light beam is emitted, which passes through the openings of the pinhole.
  • the disadvantage is that the known lighting unit has a reduced luminous efficacy.
  • a light unit for motor vehicles with a light source with a reflector and a cover
  • the reflector has a plurality of reflector segments.
  • the reflector segments are designed such that they each have a common segment center with maximum illumination intensity. Each segment center thus has a bright point of light, which gives the impression of a light emitting diode as a light source.
  • the reflector surfaces arranged around the segment center of the reflector segment are designed such that a predetermined light distribution is generated.
  • Object of the present invention is to develop a lighting unit for motor vehicles such that a modern LED styling with high brilliance and high luminous efficacy is achieved.
  • the invention in conjunction with the preamble of claim 1, characterized in that the reflector is preceded by a lens having a plurality of light segments, that the reflector segments each associated with the light-emitting segments and are formed such that at the reflector segments reflected light the respective associated light disk segments are bundled.
  • the particular advantage of the invention is that an increased brilliance of the LED styling is achieved by focusing light reflected by respective reflector segments onto corresponding upstream light disk segments.
  • the basic idea of the invention is to provide light disk segments in a light disk located in front of the reflector, in which light reflected by the reflector is bundled, so that the location of the light disk segments has a maximum illumination intensity.
  • a relatively bright point of light is created, which conveys the impression of a light diode downstream LED as a light source.
  • a relatively large reflector surface can be used to focus the light in the respective lens segments.
  • the light disk segments each have a lens structure, so that a predetermined light distribution is generated.
  • the surfaces of the reflector segment essentially serve to bundle the light in the respectively assigned light disk segments, while the light disk segments themselves are designed to generate a predetermined light distribution.
  • the reflector segments are composed in each case of a main section and of a plurality of secondary sections, wherein partial light bundles reflected by the secondary sections intersect a main light bundle reflected by the main section.
  • the main portion of the reflector segment is aligned with the respectively associated upstream lens segment. With its main light beam, it contributes substantially to the illumination intensity caused by the reflector segment on the light-emitting-disc segment.
  • the adjoining the main portion side sections have a relatively smaller area, so that they each contribute to a lesser extent to the illumination intensity at the lens segment.
  • the main portion of the reflector segment extends at a distance from an optical axis of the lighting unit, which coincides with the distance of the associated light slice segment to the optical axis.
  • the main light bundle reflected by the main section of the reflector segment is thus reflected substantially parallel to the optical axis in the direction of the light-emitting-disc segment.
  • the main portion of the reflector segment is parabolic, wherein the light source is disposed at the focal point of the main portion.
  • the main sections of the reflector segments extend - like the lens segments - in a circular ring about the optical axis, so that a circular LED styling is generated.
  • a lighting unit according to the invention for motor vehicles is preferably used as a tail lamp for generating a brake light, taillight or a combination thereof.
  • the lighting unit essentially comprises a light source 1, a reflector 2 associated with the light source 1, an optically-free cover 3 and a lens 4 arranged between the reflector 2 and the cover 3.
  • the reflector 2 has a plurality of reflector segments 5 arranged in the shape of a sector of a circle, each having a paraboloid-shaped main section H and an annular or semicircular secondary section N on the other.
  • the main sections H extend at an angle to an optical axis 8 of the lighting unit, on which an incandescent filament 9 of the light source 1 in the form of an incandescent lamp lies.
  • the main sections H extend in an equal radial distance annularly about the optical axis 8, wherein to the main portion H radially outwardly side sections N 1, N 2, N 3 and N 4 large and radially inward side sections I1, I2, I3, I4 , I5, I6 and I7.
  • the main sections H and the secondary sections N 1, N 2, N 3, N 4 are formed in such a way that, on the one hand, a partial light bundle h emitted by the incandescent filament 9 arranged at the focal point of the main section H meets the main portion H , is reflected by the same parallel to the optical axis 8 in the direction of a light-emitting segment 10 of the lens 4.
  • the light disk segments 10 are-like the main sections H -circular and extend concentrically in the circumferential direction of the lens 4, wherein they surround a central lens portion 11 having a remindstrahloptik Camill.
  • a prism structure 12 is applied to a side of the central lens section 11 facing away from the reflector 2.
  • the lens segments 10 extend in a plane which is perpendicular to the optical axis 8.
  • the principal portions H projected on the plane of extension of the lens 4 coincide in dimension with the lens segment 10.
  • the light beam n 1 or i 1 impinging on the outer side sections N 1 and I 1 adjacent to the main section H are reflected in the direction of the parallel light beam h so that they meet with it in the region of the light pane segment 10.
  • a light-emitting diode or LED
  • the reflector segments 5 arranged in the circumferential direction are each assigned a light-emitting-disc segment 10, which are distributed in a distributed manner around the optical axis 8 or the center axis of the lens 5.
  • the light-emitting-disc segments 10 can each have a lens structure 13 which has the incident light h , n 1, n 2, n 3, n 4, i 1, i 2, i 3, i 4, i 5, i 6, i 7 corresponding to one scatter the given light distribution.
  • a relatively small proportion of light preferably the light component emitted directly from the light source 1 to the front, is emitted to the outside through the central lens section 11.
  • This light component which is emitted directly to the front, together with the central light section 11, brings about a homogenization of the luminous area caused by the light disk 4.
  • the light-disk segments 10 on a side facing the reflector segment 5 can also have an optical structure 14 by means of which a specific light scattering can be generated.
  • a reflector tube 16 which has corrugation 17 on an inner side, adjoins the reflector segments 5 in the light emission direction 15.
  • the corrugation 17 is used essentially for design purposes and is visible through the crystal clear cover 3 from the outside.
  • the lens 4 is preferably colored red to produce a brake or tail light. But it can also be transparent.
  • the main sections H or the secondary sections N 1, N 2, N 3, N 4, I 1, I 2, I 3, I 4, I 5, I 6, I 7 can also be designed as free-form surfaces. It is essential that the light incident on the same and emitted by a central light source 1 be bundled in a light-emitting-segment 10.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The light unit has a light source with a reflector (2) and the cover disk covering the front aperture of the reflector. The reflector is divided into numerous reflector segments (5). There is a light disk with numerous light disk segments in front of the reflector. The combination of these segments and a reflector segments produces reflected light (H, N1, N2, N3, N4, I1, I2, I3, I4, I5, I6, I7).

Description

Die Erfindung betrifft eine Leuchteinheit für Kraftfahrzeuge mit einer Lichtquelle, mit einem der Lichtquelle zugeordneten Reflektor und mit einer eine vordere Öffnung des Reflektors abdeckenden Abdeckscheibe, wobei der Reflektor in eine Mehrzahl von Reflektorsegmente unterteilt ist.The invention relates to a lighting unit for motor vehicles with a light source, with a reflector associated with the light source and with a cover plate covering a front opening of the reflector, wherein the reflector is subdivided into a plurality of reflector segments.

Aus der DE 101 24 539 A1 ist eine Leuchteinheit für Kraftfahrzeuge bekannt, die ein Leuchtengehäuse mit einer Lichtquelle und einem Reflektor aufweist. Eine Lichtaustrittsöffnung des Gehäuses ist mittels einer Abdeckscheibe verschlossen. Zur Erzeugung eines optischen Eindrucks, die Leuchteinheit werde mittels einer Vielzahl von Leuchtdioden betrieben, ist zwischen dem Reflektor und der Abdeckscheibe eine Lochblende mit einer Mehrzahl von Öffnungen angeordnet. Vermittels des Reflektors trifft ein paralleles Lichtbündel auf die Lochblende, wobei nur der Teil des Lichtbündels abgestrahlt wird, der durch die Öffnungen der Lochblende hindurch tritt. Nachteilig weist somit die bekannte Leuchteinheit eine verringerte Lichtausbeute auf.From DE 101 24 539 A1 a lighting unit for motor vehicles is known, which has a luminaire housing with a light source and a reflector. A light exit opening of the housing is closed by means of a cover. To produce a visual impression, the lighting unit will be operated by means of a plurality of LEDs, a pinhole with a plurality of openings is arranged between the reflector and the cover. By means of the reflector, a parallel light beam impinges on the pinhole, wherein only the part of the light beam is emitted, which passes through the openings of the pinhole. The disadvantage is that the known lighting unit has a reduced luminous efficacy.

Aus der DE 101 56 973 A1 ist eine Leuchteinheit für Kraftfahrzeuge mit einer Lichtquelle, mit einem Reflektor und einer Abdeckscheibe bekannt, wobei der Reflektor eine Mehrzahl von Reflektorsegmenten aufweist. Die Reflektorsegmente sind derart ausgebildet, dass sie jeweils ein gemeinsames Segmentzentrum mit maximaler Beleuchtungsintensität aufweisen. Jedes Segmentzentrum weist somit einen hellen Lichtpunkt auf, der den Eindruck einer Leuchtdiode als Lichtquelle vermittelt. Die um das Segmentzentrum herum angeordneten Reflektorflächen des Reflektorsegmentes sind derart ausgebildet, dass eine vorgegebene Lichtverteilung erzeugt wird. Nach der bekannten Leuchteinheit wird das gewünschte LED-Styling durch eine Lichtkonzentration in den Zentren der Reflektorsegmente erzeugt.From DE 101 56 973 A1 a light unit for motor vehicles with a light source, with a reflector and a cover is known, wherein the reflector has a plurality of reflector segments. The reflector segments are designed such that they each have a common segment center with maximum illumination intensity. Each segment center thus has a bright point of light, which gives the impression of a light emitting diode as a light source. The reflector surfaces arranged around the segment center of the reflector segment are designed such that a predetermined light distribution is generated. After the known lighting unit, the desired LED styling is generated by a light concentration in the centers of the reflector segments.

Aufgabe der vorliegenden Erfindung ist es, eine Leuchteinheit für Kraftfahrzeuge derart weiterzubilden, dass ein modernes LED-Styling mit hoher Brillanz und hoher Lichtausbeute erzielt wird.Object of the present invention is to develop a lighting unit for motor vehicles such that a modern LED styling with high brilliance and high luminous efficacy is achieved.

Zur Lösung dieser Aufgabe ist die Erfindung in Verbindung mit dem Oberbegriff des Patentanspruchs 1 dadurch gekennzeichnet, dass dem Reflektor eine Lichtscheibe mit einer Mehrzahl von Lichtscheibsegmenten vorgelagert ist, dass die Reflektorsegmente jeweils den Lichtscheibsegmenten zugeordnet und derart ausgebildet sind, dass an den Reflektorsegmenten reflektierte Licht auf die jeweils zugeordneten Lichtscheibsegmente gebündelt werden.To achieve this object, the invention in conjunction with the preamble of claim 1, characterized in that the reflector is preceded by a lens having a plurality of light segments, that the reflector segments each associated with the light-emitting segments and are formed such that at the reflector segments reflected light the respective associated light disk segments are bundled.

Der besondere Vorteil der Erfindung besteht darin, dass eine verstärkte Brillanz des LED-Stylings dadurch erzielt wird, dass von jeweiligen Reflektorsegmenten reflektiertes Licht auf korrespondierende vorgelagerte Lichtscheibsegmente fokussiert wird. Grundgedanke der Erfindung ist es, in einer dem Reflektor vorgelagerten Lichtscheibe Lichtscheibsegmente vorzusehen, in denen dass von dem Reflektor reflektierte Licht gebündelt wird, so dass der Ort der Lichtscheibsegmente eine maximale Beleuchtungsintensität aufweisen. In den Lichtscheibsegmenten entsteht somit ein relativ heller Lichtpunkt, der den Eindruck einer der Lichtscheibe nachgelagerten Leuchtdiode als Lichtquelle vermittelt. Vorteilhaft kann eine relativ große Reflektorfläche dazu genutzt werden, dass Licht in den jeweiligen Lichtscheibsegmenten zu bündeln.The particular advantage of the invention is that an increased brilliance of the LED styling is achieved by focusing light reflected by respective reflector segments onto corresponding upstream light disk segments. The basic idea of the invention is to provide light disk segments in a light disk located in front of the reflector, in which light reflected by the reflector is bundled, so that the location of the light disk segments has a maximum illumination intensity. In the segments of the lens thus a relatively bright point of light is created, which conveys the impression of a light diode downstream LED as a light source. Advantageously, a relatively large reflector surface can be used to focus the light in the respective lens segments.

Nach einer Weiterbildung der Erfindung weisen die Lichtscheibsegmente jeweils eine Linsenstruktur auf, so dass eine vorgegebene Lichtverteilung erzeugt wird. Dabei dienen die Flächen des Reflektorsegmentes im Wesentlichen dazu, das Licht in den jeweils zugeordneten Lichtscheibsegmenten zu bündeln, während die Lichtscheibsegmente selbst derart ausgebildet sind, eine vorgegebene Lichtverteilung zu erzeugen.According to a development of the invention, the light disk segments each have a lens structure, so that a predetermined light distribution is generated. The surfaces of the reflector segment essentially serve to bundle the light in the respectively assigned light disk segments, while the light disk segments themselves are designed to generate a predetermined light distribution.

Nach einer Weiterbildung der Erfindung setzen sich die Reflektorsegmente jeweils aus einem Hauptabschnitt und einer Mehrzahl von Nebenabschnitten zusammen, wobei von den Nebenabschnitten reflektierte Teillichtbündel ein von dem Hauptabschnitt reflektiertes Hauptlichtbündel kreuzen. Der Hauptabschnitt des Reflektorsegmentes ist auf das jeweils zugeordnete vorgelagerte Lichtscheibsegment ausgerichtet. Es trägt mit seinem Hauptlichtbündel wesentlichen Anteil an der durch das Reflektorsegment bewirkten Beleuchtungsintensität an dem Lichtscheibsegment. Die sich an den Hauptabschnitt anschließenden Nebenabschnitte weisen eine vergleichsweise geringere Fläche auf, so dass sie jeweils in geringerem Maße zu der Beleuchtungsintensität an dem Lichtscheibsegment beitragen.According to a development of the invention, the reflector segments are composed in each case of a main section and of a plurality of secondary sections, wherein partial light bundles reflected by the secondary sections intersect a main light bundle reflected by the main section. The main portion of the reflector segment is aligned with the respectively associated upstream lens segment. With its main light beam, it contributes substantially to the illumination intensity caused by the reflector segment on the light-emitting-disc segment. The adjoining the main portion side sections have a relatively smaller area, so that they each contribute to a lesser extent to the illumination intensity at the lens segment.

Nach einer Weiterbildung der Erfindung erstreckt sich der Hauptabschnitt des Reflektorsegmentes in einem Abstand zu einer optischen Achse der Leuchteinheit, der mit dem Abstand des zugeordneten Lichtscheibsegmentes zu der optischen Achse übereinstimmt. Das von dem Hauptabschnitt des Reflektorsegmentes reflektierte Hauptlichtbündel wird somit im Wesentlichen parallel zur optischen Achse in Richtung des Lichtscheibsegmentes reflektiert.According to a development of the invention, the main portion of the reflector segment extends at a distance from an optical axis of the lighting unit, which coincides with the distance of the associated light slice segment to the optical axis. The main light bundle reflected by the main section of the reflector segment is thus reflected substantially parallel to the optical axis in the direction of the light-emitting-disc segment.

Vorzugsweise ist der Hauptabschnitt des Reflektorsegmentes parabelförmig ausgebildet, wobei die Lichtquelle im Brennpunkt des Hauptabschnitts angeordnet ist. Die Hauptabschnitte der Reflektorsegmente erstrecken sich - wie die Lichtscheibsegmente - kreisringförmig um die optische Achse, so dass ein kreisförmiges LED-Styling erzeugt wird.Preferably, the main portion of the reflector segment is parabolic, wherein the light source is disposed at the focal point of the main portion. The main sections of the reflector segments extend - like the lens segments - in a circular ring about the optical axis, so that a circular LED styling is generated.

Weitere Vorteile der Erfindung ergeben sich aus den weiteren Unteransprüchen.Further advantages of the invention will become apparent from the further subclaims.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnungen näher erläutert.An embodiment of the invention will be explained in more detail with reference to the drawings.

Es zeigen:

Figur 1
eine Vorderansicht eines Reflektors der erfindungsgemäßen Leuchteinheit,
Figur 2
eine perspektivische Ansicht des Reflektors seitlich von vorne,
Figur 3
einen Horizontalschnitt durch die Leuchteinheit ohne Darstellung einer Lichtquelle und
Figur 4
eine vergrößerte Darstellung einer Einzelheit X in Figur 3.
Show it:
FIG. 1
a front view of a reflector of the lighting unit according to the invention,
FIG. 2
a perspective view of the reflector laterally from the front,
FIG. 3
a horizontal section through the light unit without representation of a light source and
FIG. 4
an enlarged view of a detail X in Figure 3.

Eine erfindungsgemäße Leuchteinheit für Kraftfahrzeuge wird vorzugsweise als Heckleuchte eingesetzt zur Erzeugung eines Bremslichtes, Schlusslichtes oder einer Kombination derselben.A lighting unit according to the invention for motor vehicles is preferably used as a tail lamp for generating a brake light, taillight or a combination thereof.

Die Leuchteinheit weist im Wesentlichen eine Lichtquelle 1, einen der Lichtquelle 1 zugeordneten Reflektor 2, eine optikfreie Abdeckscheibe 3 sowie eine zwischen dem Reflektor 2 und der Abdeckscheibe 3 angeordnete Lichtscheibe 4 auf.The lighting unit essentially comprises a light source 1, a reflector 2 associated with the light source 1, an optically-free cover 3 and a lens 4 arranged between the reflector 2 and the cover 3.

Wie besser aus den Figuren 1 und 2 zu ersehen ist, weist der Reflektor 2 eine Mehrzahl von kreissektorförmig angeordneten Reflektorsegmenten 5 auf, die jeweils zum einen einen paraboloidförmigen Hauptabschnitt H und zum anderen kreisringförmige bzw. teilkreisringförmige Nebenabschnitte N aufweisen. Wie aus Figur 2 zu ersehen ist, erstrecken sich die Hauptabschnitte H in einem Winkel zu einer optischen Achse 8 der Leuchteinheit, auf der eine Glühwendel 9 der als Glühlampe ausgebildeten Lichtquelle 1 liegt. Die Hauptabschnitte H erstrecken sich in einem gleichen radialen Abstand kreisringförmig um die optische Achse 8, wobei sich an den Hauptabschnitt H radial nach außen hin Nebenabschnitte N1, N2, N3 und groß N4 sowie radial nach innen hin Nebenabschnitte I1, I2, I3, I4, I5, I6 und I7 anschließen. Wie besser aus Figur 3 zu ersehen ist, sind die Hauptabschnitte H bzw. die Nebenabschnitte N1, N2, N3, N4 derart ausgebildet, dass zum einen ein von der im Brennpunkt des Hauptabschnitts H angeordnete Glühwendel 9 abgestrahltes Teillichtbündel h, das auf den Hauptabschnitt H trifft, von demselben parallel zur optischen Achse 8 in Richtung eines Lichtscheibsegmentes 10 der Lichtscheibe 4 reflektiert wird. Die Lichtscheibsegmente 10 sind - wie die Hauptabschnitte H - kreisförmig ausgebildet und erstrecken sich konzentrisch in Umfangsrichtung der Lichtscheibe 4, wobei sie einen zentralen Lichtscheibabschnitt 11 umgeben, der eine Rückstrahloptikstruktur aufweist. Zu diesem Zweck ist auf einer dem Reflektor 2 abgewandten Seite des zentralen Lichtscheibabschnitts 11 eine Prismenstruktur 12 aufgebracht.As can be seen better from FIGS. 1 and 2, the reflector 2 has a plurality of reflector segments 5 arranged in the shape of a sector of a circle, each having a paraboloid-shaped main section H and an annular or semicircular secondary section N on the other. As can be seen from FIG. 2, the main sections H extend at an angle to an optical axis 8 of the lighting unit, on which an incandescent filament 9 of the light source 1 in the form of an incandescent lamp lies. The main sections H extend in an equal radial distance annularly about the optical axis 8, wherein to the main portion H radially outwardly side sections N 1, N 2, N 3 and N 4 large and radially inward side sections I1, I2, I3, I4 , I5, I6 and I7. As can be seen better from FIG. 3, the main sections H and the secondary sections N 1, N 2, N 3, N 4 are formed in such a way that, on the one hand, a partial light bundle h emitted by the incandescent filament 9 arranged at the focal point of the main section H meets the main portion H , is reflected by the same parallel to the optical axis 8 in the direction of a light-emitting segment 10 of the lens 4. The light disk segments 10 are-like the main sections H -circular and extend concentrically in the circumferential direction of the lens 4, wherein they surround a central lens portion 11 having a Rückstrahloptikstruktur. For this purpose, a prism structure 12 is applied to a side of the central lens section 11 facing away from the reflector 2.

Im vorliegenden Ausführungsführungsbeispiel erstrecken sich die Lichtscheibsegmente 10 in einer Ebene, die senkrecht zur optischen Achse 8 verläuft. Die auf die Erstreckungsebene der Lichtscheibe 4 projizierten Hauptabschnitte H stimmen in der Dimension mit dem Lichtscheibsegment 10 überein.In the present embodiment, the lens segments 10 extend in a plane which is perpendicular to the optical axis 8. The principal portions H projected on the plane of extension of the lens 4 coincide in dimension with the lens segment 10.

Die auf den zum Hauptabschnitt H benachbart angeordneten äußeren Nebenabschnitte N1 und I1 auftreffenden Lichtstrahlbündel n1 bzw. i1 werden in Richtung des parallelen Lichtbündels h reflektiert, so dass sie im Bereich des Lichtscheibsegmentes 10 mit demselben zusammen treffen. Auch die weiteren auf die äußeren und inneren Nebenabschnitte N2, N3, N4, I2, I3, I4, I5, I6, I7 auftreffenden Teillichtbündel, von denen in Figur 4 beispielhaft die Lichtbündel n4 sowie i7 dargestellt sind, werden an den entsprechenden Nebenabschnitten N2, N3, N4, I2, I3, I4, I5, I6, I7 derart in Richtung des Hauptlichtbündels h reflektiert, dass sie im Bereich des vorgelagerten Lichtscheibsegmentes 10 gebündelt werden. Auf diese Weise wird das gesamte vom Reflektorsegment 5 reflektierte Lichtbündel in dem Lichtscheibsegment 10 fokussiert mit der Wirkung, dass durch diese Lichtkonzentration der Anschein erweckt wird, dass hinter dem Lichtscheibsegment 10 als Lichtquelle eine Leuchtdiode (oder LED) angeordnet ist.The light beam n 1 or i 1 impinging on the outer side sections N 1 and I 1 adjacent to the main section H are reflected in the direction of the parallel light beam h so that they meet with it in the region of the light pane segment 10. The further partial light bundles incident on the outer and inner side sections N 2, N 3, N 4, I 2, I 3, I 4, I 5, I 6, I 7, of which the light beams n 4 and i 7 are shown by way of example in FIG the corresponding subsections N 2, N 3, N 4, I 2, I 3, I 4, I 5, I 6, I 7 such reflected in the direction of the main light beam h that they bundled in the region of the upstream light-emitting segment 10 become. In this way, the entire reflected by the reflector segment 5 light beam is focused in the light-emitting segment 10 with the effect that is caused by this light concentration the appearance that behind the light-emitting segment 10 as light source, a light-emitting diode (or LED) is arranged.

Den im Umfangsrichtung angeordneten Reflektorsegmenten 5 sind jeweils ein Lichtscheibsegment 10 zugeordnet, die konzentrisch verteilt um die optische Achse 8 bzw. der Mittelachse der Lichtscheibe 5 verteilt angeordnet sind. Die Lichtscheibsegmente 10 können jeweils eine Linsenstruktur 13 aufweisen, die das einfallende Licht h, n1, n2, n3, n4, i1, i2, i3, i4, i5, i6, i7 entsprechend einer vorgegebenen Lichtverteilung streuen. Ein relativ geringer Lichtanteil, vorzugsweise der direkt von der Lichtquelle 1 nach vorne abgestrahlte Lichtanteil, wird durch den zentralen Lichtscheibabschnitt 11 nach außen abgegeben. Dieser direkt nach vorne abgestrahlte Lichtanteil bewirkt zusammen mit dem zentralen Lichtabschnitt 11 eine Homogenisierung der durch die Lichtscheibe 4 bewirkten Leuchtfläche. Als im Wesentlichen Licht abgebende Fläche der Lichtscheibe 5 dienen lediglich die Lichtscheibsegmente 10.The reflector segments 5 arranged in the circumferential direction are each assigned a light-emitting-disc segment 10, which are distributed in a distributed manner around the optical axis 8 or the center axis of the lens 5. The light-emitting-disc segments 10 can each have a lens structure 13 which has the incident light h , n 1, n 2, n 3, n 4, i 1, i 2, i 3, i 4, i 5, i 6, i 7 corresponding to one scatter the given light distribution. A relatively small proportion of light, preferably the light component emitted directly from the light source 1 to the front, is emitted to the outside through the central lens section 11. This light component, which is emitted directly to the front, together with the central light section 11, brings about a homogenization of the luminous area caused by the light disk 4. As a substantially light-emitting surface of the light disk 5, only the light-disk segments 10 are used.

Wie aus Figur 3 ersichtlich ist, können die Lichtscheibsegmente 10 auf einer dem Reflektorsegment 5 zugewandten Seite auch eine Optikstruktur 14 aufweisen, mittels der eine bestimmte Lichtstreuung erzeugt werden kann.As can be seen from FIG. 3, the light-disk segments 10 on a side facing the reflector segment 5 can also have an optical structure 14 by means of which a specific light scattering can be generated.

Wie aus Figur 2 zu ersehen ist, schließt sich an die Reflektorsegmente 5 in Lichtabstrahlrichtung 15 ein Reflektortubus 16 an, der auf einer Innenseite eine Riffelung 17 aufweist. Die Riffelung 17 dient im Wesentlichen Designzwecken und ist durch die glasklare Abdeckscheibe 3 von außen sichtbar.As can be seen from FIG. 2, a reflector tube 16, which has corrugation 17 on an inner side, adjoins the reflector segments 5 in the light emission direction 15. The corrugation 17 is used essentially for design purposes and is visible through the crystal clear cover 3 from the outside.

Die Lichtscheibe 4 ist vorzugsweise zur Erzeugung eines Brems- oder Schlusslichtes rot eingefärbt. Sie kann aber auch transparent ausgebildet sein.The lens 4 is preferably colored red to produce a brake or tail light. But it can also be transparent.

Nach einer nicht dargestellten alternativen Ausführungsform können die Hauptabschnitte H bzw. die Nebenabschnitte N1, N2, N3, N4, I1, I2, I3, I4, I5, I6, I7 auch als Freiformflächen ausgebildet sein. Wesentlich ist, dass das auf dieselben auftreffende und von einer zentralen Lichtquelle 1 ausgesandte Licht in einem Lichtscheibsegment 10 gebündelt wird.According to an alternative embodiment not shown, the main sections H or the secondary sections N 1, N 2, N 3, N 4, I 1, I 2, I 3, I 4, I 5, I 6, I 7 can also be designed as free-form surfaces. It is essential that the light incident on the same and emitted by a central light source 1 be bundled in a light-emitting-segment 10.

Claims (10)

Leuchteinheit für Kraftfahrzeuge mit einer Lichtquelle, mit einem der Lichtquelle zugeordneten Reflektor und mit einer eine vordere Öffnung des Reflektors abdeckenden Abdeckscheibe, wobei der Reflektor in eine Mehrzahl von Reflektorsegmente unterteilt ist, dadurch gekennzeichnet, dass dem Reflektor (2) eine Lichtscheibe (4) mit einer Mehrzahl von Lichtscheibsegmenten (10) vorgelagert ist, dass die Reflektorsegmente (5) jeweils den Lichtscheibsegmenten zugeordnet und derart ausgebildet sind, dass an den Reflektorsegmenten (5) reflektierte Licht (h, n1, n2, n3, n4, i1, i2, i3, i4, i5, i6, i7) auf die jeweils zugeordneten Lichtscheibsegmente (10) gebündelt werden.Lighting unit for motor vehicles with a light source, with a reflector associated with the light source and with a front opening of the reflector covering the cover, wherein the reflector is divided into a plurality of reflector segments, characterized in that the reflector (2) with a lens (4) is preceded by a plurality of light-emitting- disc segments (10) such that the reflector segments (5) are each assigned to the light-disk segments and are designed such that light reflected at the reflector segments (5) ( h , n1, n2, n 3, n 4, i 1, i 2, i 3, i 4, i 5, i 6, i 7) are focused onto the respective associated light-emitting-disc segments (10). Leuchteinheit nach Anspruch 1, dadurch gekennzeichnet, dass das Reflektorsegment (5) einen Hauptabschnitt (H) und mehrere Nebenabschnitte (N1, N2, N3, N4, I1, I2, I3, I4, I5, I6, I7) aufweist, wobei das von dem Nebenabschnitt (N1, N2, N3, N4, I1, I2, I3, I4, I5, I6, I7) reflektierte Teillichtbündel (n1, n2, n3, n4, i1, i2, i3, i4, i5, i6, i7) ein von dem Hauptabschnitt (H) reflektiertes Hauptlichtbündel (h) kreuzen.Lighting unit according to claim 1, characterized in that the reflector segment (5) has a main portion ( H ) and a plurality of side sections ( N 1, N 2, N 3, N 4, I1, I2, I3, I4, I5, I6, I7) in which the partial light bundle ( n 1, n 2, n 3, n 4, i 1.) reflected by the secondary section ( N 1, N 2, N 3, N 4, I 1, I 2, I 3, I 4, I 5, I 6, I 7) , i 2, i 3, i 4, i 5, i 6, i 7) intersect a main light bundle ( h ) reflected from the main portion ( H ). Leuchteinheit nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Reflektorsegment (5) einen Hauptabschnitt (H) aufweist, derart, dass von dem Hauptabschnitt (H) das Licht (h) parallel zur optischen Achse (8) der Leuchteinheit in Richtung des vorgelagerten Lichtscheibsegmentes (10) reflektiert wird.Lighting unit according to claim 1 or 2, characterized in that the reflector segment (5) has a main portion ( H ), such that of the main portion ( H ), the light ( h ) parallel to the optical axis (8) of the lighting unit in the direction of the upstream Lichtscheibsegmentes (10) is reflected. Leuchteinheit nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Hauptabschnitt (H) des Reflektorsegmentes (5) parabelförmig ausgebildet ist.Lighting unit according to one of claims 1 to 3, characterized in that the main portion ( H ) of the reflector segment (5) is parabolic. Leuchteinheit nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Nebenabschnitte (N1, N2, N3, N4, I1, I2, I3, I4, I5, I6, I7) des Reflektorsegmentes (5) derart ausgebildet sind, dass die von denselben reflektierten Nebenlichtbündel (n1, n2, n3, n4, i1, i2, i3, i4, i5, i6, i7) in dem vorgelagerten Lichtscheibsegment (10) zusammentreffen.Lighting unit according to one of claims 1 to 4, characterized in that the secondary sections ( N 1, N 2, N 3, N 4, I1, I2, I3, I4, I5, I6, I7) of the reflector segment (5) are formed in that the secondary light bundles ( n 1, n 2, n 3, n 4, i 1, i 2, i 3, i 4, i 5, i 6, i 7) reflected by them converge in the upstream light-emitting-disc segment (10). Leuchteinheit nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Nebenabschnitte (N1, N2, N3, N4, I1, I2, I3, I4, I5, I6, I7) rotationssymmetrisch zumindest teilweise um den Hauptabschnitt (H) herum verlaufend zu dem vorgelagerten Lichtscheibsegment (10) angeordnet sind.Lighting unit according to one of claims 1 to 5, characterized in that the secondary sections ( N 1, N 2, N 3, N 4, I1, I2, I3, I4, I5, I6, I7) rotationally symmetrical at least partially around the main portion ( H ) are arranged running around to the upstream light-emitting-disc segment (10). Leuchteinheit nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das Reflektorsegment (5) kreissektorförmig ausgebildet ist mit kreisringförmig um die optische Achse (8) verlaufenden Hauptabschnitten (H), wobei sich an den Hauptabschnitten (H) nacheinander kreisringförmige Nebenabschnitte (N1, N2, N3, N4, I1, I2, I3, I4, I5, I6, I7) anschließen.Lighting unit according to one of claims 1 to 6, characterized in that the reflector segment (5) is formed circular sector-shaped with annular around the optical axis (8) extending main sections ( H ), wherein at the main sections ( H ) successively annular side sections ( N 1st , N 2, N 3, N 4, I1, I2, I3, I4, I5, I6, I7). Leuchteinheit nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Llchtscheibsegmente (10) kreisförmig ausgebildet sind und sich kreisringsförmig um einen zentralen Lichtscheibabschnitt (11) erstrecken, der eine Rückstrahloptikstruktur (12) aufweist.Lighting unit according to one of claims 1 to 7, characterized in that the Llchtscheibsegmente (10) are circular and extend in a circular ring around a central lens portion (11) having a Rückstrahloptikstruktur (12). Leuchteinheit nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Lichtscheibsegmente (10) eine Linsenstruktur aufweisen, derart, dass eine vorgegebene Lichtverteilung erzeugt wird.Lighting unit according to one of claims 1 to 8, characterized in that the light disk segments (10) have a lens structure, such that a predetermined light distribution is generated. Leuchteinheit nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Lichtquelle (1) als eine Glühlampe ausgebildet ist.Lighting unit according to one of claims 1 to 9, characterized in that the light source (1) is designed as a light bulb.
EP05107120.7A 2004-08-19 2005-08-02 Lighting unit for motor vehicles Not-in-force EP1628071B1 (en)

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DE102004040159A DE102004040159A1 (en) 2004-08-19 2004-08-19 Lighting unit for motor vehicles

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EP1628071A3 EP1628071A3 (en) 2008-07-02
EP1628071B1 EP1628071B1 (en) 2014-02-12

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DE10124539A1 (en) 2001-05-19 2002-11-21 Reitter & Schefenacker Gmbh Rear light for vehicle, especially motor vehicle, has at least one perforated panel with at least one light passage opening arranged between reflector and light panel
DE10156973A1 (en) 2001-11-20 2003-05-28 Hella Kg Hueck & Co Vehicle light has reflector divided into number of segments in housing and central light source; individual segments are computed as decentralized optics and form segment reflectors

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DE102008019125A1 (en) * 2008-04-16 2009-10-22 Volkswagen Ag vehicle light

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