EP1628071B1 - Lighting unit for motor vehicles - Google Patents

Lighting unit for motor vehicles Download PDF

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Publication number
EP1628071B1
EP1628071B1 EP05107120.7A EP05107120A EP1628071B1 EP 1628071 B1 EP1628071 B1 EP 1628071B1 EP 05107120 A EP05107120 A EP 05107120A EP 1628071 B1 EP1628071 B1 EP 1628071B1
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EP
European Patent Office
Prior art keywords
light
reflector
segments
segment
disk
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.)
Not-in-force
Application number
EP05107120.7A
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German (de)
French (fr)
Other versions
EP1628071A3 (en
EP1628071A2 (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 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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    • 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.
  • 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.
  • the lens has a plurality of segments of the lens on, wherein a central lens segment plankonvex and distributed in the circumferential direction arranged light disc segments are formed meniscus-shaped.
  • the reflector has a plurality of sector segments arranged reflector segments, which are each formed paraboloid-shaped. A radially outer portion of the reflector segment and a radially inner portion of the reflector segment are formed in such a way that the light reflected at the respective reflector segments only coincide in the area of the upstream light disk segment relative to an optical axis of the respective light disk segment.
  • Object of the present invention is to develop a lighting unit for motor vehicles such that a modern LED styling with increased brilliance and high luminous efficacy is achieved.
  • the invention has the features of claim 1.
  • 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 arranged 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 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 a plurality of circular sector-shaped reflector segments 5, each having a paraboloidal main section H and the other annular or teilnikringförmige secondary sections N on the one hand.
  • the main sections H extend at an angle to an optical axis 8 of the lighting unit, on which a filament 9 of the formed as a light bulb 1 is located.
  • 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. How better FIG.
  • the main sections H and the side sections N 1, N 2, N 3, N 4 are formed such that on the one hand from the arranged in the focal point of the main portion H filament 9 partial light beam h, which strikes 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 scrubstrahloptik Medical.
  • 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.
  • the light bundles n 4 and i 7 are shown are reflected at the corresponding subsections N 2, N 3, N 4, I 2, I 3, I 4, I 5, I 6, I 7 in the direction of the main light beam h , that they in the region of the upstream Lens segment 10 bundled become.
  • 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-emitting-disc 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.
  • FIG. 2 joins the reflector segments 5 in Lichtabstrahlraum 15 a reflector tube 16, which has a corrugation 17 on an inner side.
  • 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)

Description

Die Erfindung betrifft eine Leuchteinheit für Kraftfahrzeuge.The invention relates to a lighting unit for motor vehicles.

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 the 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 the 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.

Aus der US 6 364 514 B1 ist eine Leuchteinheit für Kraftfahrzeuge mit einer Lichtquelle, einem Reflektor und einer dem Reflektor vorgelagerten Lichtscheibe bekannt. Die Lichtscheibe weist eine Mehrzahl von Lichtscheibsegmenten auf, wobei ein zentrales Lichtscheibsegment plankonvex und in Umfangsrichtung verteilt angeordnete Lichtscheibsegmenten meniskusförmig ausgebildet sind. Der Reflektor weist eine Mehrzahl von kreissektorförmig angeordneten Reflektorsegmenten auf, die jeweils paraboloidförmig ausgebildet sind. Bezogen auf eine optische Achse des jeweils dem Reflektorsegment vorgelagerten Lichtscheibsegmentes ist ein in radialer Richtung äußerer Abschnitt des Reflektorsegmentes und ein in radialer Richtung innerer Abschnitt des Reflektorsegmentes derart ausgebildet, dass das an den jeweiligen Reflektorsegmenten reflektierte Licht lediglich im Bereich des vorgelagerten Lichtscheibsegmentes zusammentreffen.From the US 6,364,514 B1 is a lighting unit for motor vehicles with a light source, a reflector and the reflector upstream lens known. The lens has a plurality of segments of the lens on, wherein a central lens segment plankonvex and distributed in the circumferential direction arranged light disc segments are formed meniscus-shaped. The reflector has a plurality of sector segments arranged reflector segments, which are each formed paraboloid-shaped. A radially outer portion of the reflector segment and a radially inner portion of the reflector segment are formed in such a way that the light reflected at the respective reflector segments only coincide in the area of the upstream light disk segment relative to an optical axis of the respective light disk segment.

Aufgabe der vorliegenden Erfindung ist es, eine Leuchteinheit für Kraftfahrzeuge derart weiterzubilden, dass ein modernes LED-Styling mit erhöhter 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 increased brilliance and high luminous efficacy is achieved.

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

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 arranged 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 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 FIG. 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.How better off the Figures 1 and 2 can be seen, the reflector 2, a plurality of circular sector-shaped reflector segments 5, each having a paraboloidal main section H and the other annular or teilkreisringförmige secondary sections N on the one hand. How out FIG. 2 is to be seen, the main sections H extend at an angle to an optical axis 8 of the lighting unit, on which a filament 9 of the formed as a light bulb 1 is located. 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. How better FIG. 3 can be seen, the main sections H and the side sections N 1, N 2, N 3, N 4 are formed such that on the one hand from the arranged in the focal point of the main portion H filament 9 partial light beam h, which strikes 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 FIG FIG. 4 By way of example, the light bundles n 4 and i 7 are shown, are reflected at the corresponding subsections N 2, N 3, N 4, I 2, I 3, I 4, I 5, I 6, I 7 in the direction of the main light beam h , that they in the region of the upstream Lens segment 10 bundled 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.How out FIG. 3 it can be seen, the light-emitting-disc 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.How out FIG. 2 can be seen, joins the reflector segments 5 in Lichtabstrahlrichtung 15 a reflector tube 16, which has a corrugation 17 on an inner side. 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 (6)

  1. Light unit for motor vehicles having a light source (1), a reflector (2) assigned to said light source and a cover lens (3) covering up a forward openingofsaid reflector (2) wherein said reflector (2) is subdivided into a plurality of sector shaped segments (5), wherein a light disk (4) having a plurality of light disk segments (10) is disposed in front of the reflector (2), wherein each of said reflector segments (5) is assigned one of the light disk segments (10) and designed such that light (h, n1, n2, n3, n4, i1, i2, i3, i4, i5, i6, i7) reflected from said reflector segments (5) is focused to respective ones of said assigned light disk segments (10), characterized in that the reflector element (5) comprises on the one hand a paraboloid main section (H) and on the other hand a plurality of circular or pitch circular secondary sections (N1, N2, N3. N4, I1, 12, 13, 14, I5, 16, 17) that successively project radially outward and radially inward, wherein said main sections extend in an annular pattern around an optical axis at identical radial spacings and wherein the light disk segments all extend in a plane that is perpendicular to said optical axis such that the main section (H) projected to the extension plane of the light disk (4) conforms to the dimension of the light disk segments (10), and wherein said secondary sections (N1, N2, N3, N4, I1, 12, 13, 14, I5, 16, 17) of the reflector segment (5) are designed such that the secondary light beams (n1, n2, n3, n4, i1, i2, i3, i4, i5, i6, i7) reflected therefrom coincide with the frontal light disk segment (10).
  2. Light unit according to Claim 1, characterized in that the reflector segment (5) comprises a main section (H) such that light (h) is reflected therefrom parallel to the optical axis (8) of the light unit toward the frontal light disk segment (10).
  3. Light unit according to Claim 1 or 2, characterized in that said secondary sections (N1, N2, N3, N4, I1, 12, 13, 14, 15, 16) are disposed in a rotationally symmetrical pattern at least in part around said main section(H) toward the frontal light disk segment (10).
  4. Light unit according to any of the preceding Claims 1 to 3, characterized in that the light disk segments (10) are of circular shape and in circular arrangement extend around a central light disk section (11) that has an optical reflex structure (12).
  5. Light unit according to any of the preceding Claims 1 to 4, characterized in that the light disk segment (10) has a lens structure to the effect that a predetermined light distribution is obtained.
  6. Light unit according to any of the preceding Claims 1 to 5, characterized in that the light source (1) is an incandescent bulb.
EP05107120.7A 2004-08-19 2005-08-02 Lighting unit for motor vehicles Not-in-force EP1628071B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004040159A DE102004040159A1 (en) 2004-08-19 2004-08-19 Lighting unit for motor vehicles

Publications (3)

Publication Number Publication Date
EP1628071A2 EP1628071A2 (en) 2006-02-22
EP1628071A3 EP1628071A3 (en) 2008-07-02
EP1628071B1 true EP1628071B1 (en) 2014-02-12

Family

ID=35427624

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05107120.7A Not-in-force EP1628071B1 (en) 2004-08-19 2005-08-02 Lighting unit for motor vehicles

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EP (1) EP1628071B1 (en)
DE (1) DE102004040159A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008019125A1 (en) * 2008-04-16 2009-10-22 Volkswagen Ag vehicle light

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3005954B2 (en) * 1998-04-10 2000-02-07 スタンレー電気株式会社 Lamp
JP2945376B1 (en) * 1998-05-01 1999-09-06 スタンレー電気株式会社 Light fixture
JP3904783B2 (en) 1999-11-30 2007-04-11 株式会社小糸製作所 Vehicle sign light
DE10124539B4 (en) * 2001-05-19 2009-07-23 Odelo Gmbh Tail light for vehicles, especially for motor vehicles
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
DE10160052A1 (en) * 2001-12-06 2003-06-18 Hella Kg Hueck & Co Vehicle light has light elements on periphery of bearer part arranged to radiate radially outwards and with laterally arranged contact feet that make flat contact with contact surfaces
DE10219246A1 (en) * 2002-04-18 2003-11-06 Valeo Beleuchtung Deutschland Lighting device for motor vehicles

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Publication number Publication date
EP1628071A3 (en) 2008-07-02
DE102004040159A1 (en) 2006-02-23
EP1628071A2 (en) 2006-02-22

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