EP2178722B1 - Illuminating device for vehicles - Google Patents

Illuminating device for vehicles Download PDF

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Publication number
EP2178722B1
EP2178722B1 EP08784383.5A EP08784383A EP2178722B1 EP 2178722 B1 EP2178722 B1 EP 2178722B1 EP 08784383 A EP08784383 A EP 08784383A EP 2178722 B1 EP2178722 B1 EP 2178722B1
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EP
European Patent Office
Prior art keywords
illuminating device
reflector
charge
charge dissipation
dissipation path
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.)
Active
Application number
EP08784383.5A
Other languages
German (de)
French (fr)
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EP2178722A1 (en
Inventor
Oliver Kaak
Jürgen HIGGEN
Frank Johannsmann
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 GmbH and Co KGaA
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Publication of EP2178722A1 publication Critical patent/EP2178722A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • 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
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/19—Attachment of light sources or lamp holders
    • F21S43/195—Details of lamp holders, terminals or connectors
    • 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
    • F21S43/33—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors characterised by their material, surface treatment or coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes

Definitions

  • the invention relates to a lighting device for vehicles, in particular tail lamp, comprising a housing containing at least one light source, a carrier receiving the light source and a reflector, and having a lens for covering an opening of the housing.
  • a lighting device for vehicles is known with a housing in which a plurality of light sources are arranged.
  • a plurality of light sources are designed as light-emitting elements (LED), which are arranged on a common light-emitting element carrier.
  • LED light-emitting elements
  • a reflector is arranged for guiding the light emitted by the light elements.
  • another type of light source is arranged in the housing, namely an incandescent lamp which serves to produce a different light function.
  • the housing which is open at the front in the main emission direction, is covered by a lens.
  • ESD electrostatic discharges
  • Object of the present invention is to provide a lighting device for vehicles in such a way that when installing the lighting device in a body panel of a vehicle, especially when electrically connecting the lighting device to the electrical system of the vehicle, the function of applied to a support electrical components is maintained.
  • the invention in conjunction with the preamble of claim 1, characterized in that the reflector provided with an electrically conductive layer charge derivation means are assigned, such that when an electrostatic charge of the reflector flows a discharge current to a ground terminal of the illumination device.
  • the invention makes it possible by charge discharge means a targeted outflow of a short relatively high electric current in the direction of a ground terminal of the lighting device. Potential differences between a reflector and the body of the vehicle occurring during installation of the illumination device in a body cutout of the vehicle are determined by the charge deflection means balanced, without that on a support of the light source arranged electrical components of a control device, such as transistors, diodes and the like, can be destroyed. These electrical components can be used, for example, for diagnostic purposes, for overvoltage protection or for driving light-emitting diodes.
  • a charge conduction path is provided as a charge dissipation means, which is contacted directly at a first end with the reflector and at a second end directly to a ground terminal of the carrier or a central connector of the illumination device.
  • a targeted discharge of charge can thereby be achieved, bypassing electrically conductive surfaces of the carrier in the case of an electrostatic charging of the reflector.
  • Reflectors in the context of the invention are all plastic surfaces which are suitable to be electrostatically charged and are arranged in contact or in the vicinity of the support of the light sources.
  • the charge dissipation path according to the invention can also serve to improve the electromagnetic compatibility of the illumination device.
  • electromagnetic interference that could lead to components of the carrier in undefined states, such as the glimmer of light-emitting diodes, driving through transistors are prevented by the targeted derivation of the electric current.
  • the charge dissipation path is electrically and mechanically coupled to the reflector via a contact spring element and / or via a plug-in element.
  • this can be used to produce a secure electrical connection and, secondly, a relatively simple mechanical connection between the reflector and the charge dissipation path.
  • the charge dissipation path can be integrated in a bulb holder for receiving a plurality of light bulbs for a light function.
  • the charge dissipation path can be formed as a separate dissipation conductor together with further electrical conductors as a stamped grid of the lamp carrier. For electrostatic discharge can thus take place in the bulb holder targeted charge discharge.
  • the charge dissipation path can be formed as a current-conducting conductor track, which is integrated in a light-emitting element carrier designed as a printed circuit board.
  • the charge dissipation path can thereby be produced in a space-saving and cost-effective manner.
  • the first end of the current-conducting conductor track is formed as a bonding pad, which is arranged in the region of a mounting hole of the printed circuit board.
  • a fastening element provided for fastening the printed circuit board to the reflector can be contacted in the region of the fastening bore with the current-conducting printed conductor, so that without additional mechanical and electrical connections Connecting means a coupling between the charge dissipation path on the one hand and the reflector on the other hand can be made.
  • this assembly can be simplified.
  • a lighting device according to the invention for vehicles is preferably designed as a tail lamp, which with a housing is arranged in a body cutout of the vehicle.
  • a light-emitting element carrier 3 is provided in the housing as a carrier, which carries a plurality of light-emitting elements 4 (LED) as a printed circuit board.
  • the LED lighting elements 4 serve to generate another light function, such as a brake light function.
  • a main emission direction H of the light bundle generated by the illumination device front opening of the housing is covered by a lens 5.
  • the circuit board 3 is elongated formed as a strip, the LED lighting elements 4 are arranged in rows and at a distance from each other. Between the LED lighting elements 4 each mounting holes 6 are arranged so that fastening screws 7 can engage as fastening means for mounting the circuit board 3 at a main radiation H behind the printed circuit board 3 arranged reflector 8.
  • the reflector 8 as fastening means projecting Befest Trentsdome. 9 on, which rest on a rear side 10 of the printed circuit board 3 and are in rotary engagement with the fastening screw 7, see FIG. 4 ,
  • a further reflector 11 is provided in the main emission direction H in front of the bulb holder 1, for guiding the light emitted by the incandescent lamps 2 light.
  • the reflectors 8 and 11 each consist of a plastic material which is provided with an aluminum coating by means of vapor deposition.
  • charge derivation means are provided according to the invention.
  • a separate charge discharge path 12 is provided on a side of the lamp support 1 facing the reflector 11, which is arranged integrated as an electric charge conductor in a stamped grid of the lamp support 1.
  • the stamped grid moreover comprises further electrical conductors which serve for electrical connection of the incandescent lamps 2 to an electrical terminal 13 of the lamp carrier 1.
  • the electrical connection 13 has a plurality of contact elements, which can be electrically and mechanically connected to a central plug 14 of a central plug-in device, wherein the central plug 14 is connected via a cable to the electrical system of the vehicle.
  • the charge dissipation path 12 is electrically and mechanically connected to a wall portion 17 of the reflector 11 at a first end 15 thereof via a contact spring element 16.
  • the contact spring element 16 is made of an electrically conductive material and has a U-shaped portion 18, by means of which it is clamping is connected to the wall portion 17 of the reflector 11. Furthermore, the contact spring element 16 has a V-shaped portion 19 which presses on the first end 15 of the charge arrester 12.
  • a second end 20 of the charge arrester 12 is connected to a ground terminal M of the lamp carrier terminal 13.
  • the charge dissipation path may be formed as a power cable 21 extending in the space between the reflector 8 and a ground terminal M of the lamp support terminal 13 or the illumination device.
  • the ground connection M of the illumination device is arranged integrated in the electrical connection 13 of the lamp carrier 1.
  • a first end of the power line cable 21 is mechanically and electrically connected via a plug-in element 22 to a web-shaped wall section 23 of the reflector 8.
  • the power cable 21 extends together with a power cable 24 of the circuit board 3 to the terminal 13 of the lamp support 1.
  • the power cable 21 and the power cable 24 may be interconnected by crimping.
  • the power cable 24 is like the power cable 21 via a peripheral contact plug 22 'connected to connecting tracks of the circuit board 3.
  • a charge dissipation path as a charge-draining Conductor 25 is formed, which extends on the reflector 8 facing the rear side 10 of the printed circuit board 3.
  • a first end of the charge-dissipating interconnect 25 is formed as a bonding pad 26 which extends in the region of a front side of the circuit board 3 facing mounting hole 6.
  • the bonding pad 26 extends annularly around the mounting hole 6. In the region of the bonding pad 26, the printed circuit board 3 has no copper layers.
  • the bonding pad 26 can be produced, for example, by the application of solder, like the charge-dissipating conductive track itself.
  • the first end of the charge-dissipating interconnect 25 is thus located in a mounting area between the circuit board 3 and the reflector 8.
  • the fastening screw 7 is in screw engagement with the mounting dome 9 of the reflector 8, wherein the mounting dome 9 with a free end face on the bonding pad 26 is present.
  • a second end of the charge-discharging conductor 25 is connected to the ground terminal M of the tracks of the circuit mounted on the printed circuit board 3.
  • a plug-in element 27 which can be plugged on at the end is arranged, from which a power cable 28 leads to the electrical connection 13 of the lamp support 1.
  • the charge-dissipating conductor 25 causes a direct discharge of charge from the reflector 8 in the direction of the ground connection M of a central plug-in device in a manner which is simple in terms of production technology, so that the rear side 10 of the printed circuit board 3 arranged electronic components 29, such as transistors or the like, are not damaged in an electrostatic discharge of the reflector 8.
  • the circuit board can be used exclusively for controlling remote light sources (LED lighting elements), wherein the circuit board is equipped exclusively with electronic components for the control, but not with LED lighting elements.
  • LED lighting elements LED lighting elements
  • the illumination device may also be designed as a headlight or as arranged in an interior of the vehicle interior light.
  • the lighting device according to the invention can be used wherever metallic surfaces are present, which could lead to an undesirable electrical charge.

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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)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Description

Die Erfindung betrifft eine Beleuchtungseinrichtung für Fahrzeuge, insbesondere Heckleuchte, mit einem Gehäuse enthaltend mindestens eine Lichtquelle, einen die Lichtquelle aufnehmenden Träger und einen Reflektor, und mit einer Lichtscheibe zur Abdeckung einer Öffnung des Gehäuses.The invention relates to a lighting device for vehicles, in particular tail lamp, comprising a housing containing at least one light source, a carrier receiving the light source and a reflector, and having a lens for covering an opening of the housing.

Aus der DE 10 2006 001 363 A1 ist eine Beleuchtungseinrichtung für Fahrzeuge mit einem Gehäuse bekannt, in dem eine Mehrzahl von Lichtquellen angeordnet sind. Zum einen sind eine Mehrzahl von Lichtquellen als Leuchtelemente (LED) ausgebildet, die auf einem gemeinsamen Leuchtelemente-Träger angeordnet sind. In Hauptabstrahlrichtung vor dem Leuchtelemente-Träger ist ein Reflektor angeordnet zur Lichtführung des von den Leuchtelementen abgestrahlten Lichtes. Ferner ist in dem Gehäuse ein anderer Typus von Lichtquelle angeordnet, nämlich eine Glühlampe, die zur Erzeugung einer anderen Lichtfunktion dient. Das in Hauptabstrahlrichtung vorne geöffnete Gehäuse ist mittels einer Lichtscheibe abgedeckt. Es hat sich herausgestellt, dass bei Kontaktierung der Beleuchtungseinrichtung, zum Beispiel in der Leuchtenfertigung oder beim Verbauen der Beleuchtungseinrichtung in dem Fahrzeug, aufgrund der aufgeladenen Beleuchtungseinrichtung es zu elektrostatische Entladungen (ESD) über eine Leiterplatte kommen kann, wobei relativ hohe Stromimpulse entlang der Leiterplatte fließen und zu einer Zerstörung von elektrischen Bauteilen führen können. Die elektrostatische Aufladung entsteht vorzugsweise an dem mit einem metallischen Überzug versehenen Reflektor. Erst wenn die Beleuchtungseinrichtung in dem Fahrzeug verbaut ist, wobei das Batteriekabel an dem Fahrzeug angeschlossen ist, weisen die flächigen Bauteile der Beleuchtungseinrichtung ein gemeinsames Potential auf.From the DE 10 2006 001 363 A1 a lighting device for vehicles is known with a housing in which a plurality of light sources are arranged. On the one hand, a plurality of light sources are designed as light-emitting elements (LED), which are arranged on a common light-emitting element carrier. In the main emission direction in front of the light-emitting element carrier, a reflector is arranged for guiding the light emitted by the light elements. Furthermore, another type of light source is arranged in the housing, namely an incandescent lamp which serves to produce a different light function. The housing, which is open at the front in the main emission direction, is covered by a lens. It has been found that when contacting the illumination device, for example in the manufacture of luminaires or when installing the illumination device in the vehicle, electrostatic discharges (ESD) can occur via a printed circuit board due to the charged illumination device relatively high current pulses flow along the circuit board and can lead to the destruction of electrical components. The electrostatic charge is preferably generated on the reflector provided with a metallic coating. Only when the lighting device is installed in the vehicle, wherein the battery cable is connected to the vehicle, the flat components of the lighting device on a common potential.

Aufgabe der vorliegenden Erfindung ist es, eine Beleuchtungseinrichtung für Fahrzeuge derart weiterzubilden, dass beim Verbauen der Beleuchtungseinrichtung in einem Karosserieausschnitt eines Fahrzeugs, insbesondere beim elektrischen Anschließen der Beleuchtungseinrichtung an das Bordnetz des Fahrzeugs, die Funktion von auf einem Träger aufgebrachten elektrischen Bauteilen aufrechterhalten bleibt.Object of the present invention is to provide a lighting device for vehicles in such a way that when installing the lighting device in a body panel of a vehicle, especially when electrically connecting the lighting device to the electrical system of the vehicle, the function of applied to a support electrical components is maintained.

Zur Lösung dieser Aufgabe ist die Erfindung in Verbindung mit dem Oberbegriff des Patentanspruchs 1 dadurch gekennzeichnet, dass dem mit einer elektrisch leitenden Schicht versehenen Reflektor Ladungsableitungsmittel zugeordnet sind, derart, dass bei Auftreten einer elektrostatischen Aufladung des Reflektors ein Ableitungsstrom zu einem Masseanschluss der Beleuchtungseinrichtung fließt.To achieve this object, the invention in conjunction with the preamble of claim 1, characterized in that the reflector provided with an electrically conductive layer charge derivation means are assigned, such that when an electrostatic charge of the reflector flows a discharge current to a ground terminal of the illumination device.

Die Erfindung ermöglicht durch Ladungsableitungsmittel einen gezielten Abfluss eines kurzen relativ hohen elektrischen Stroms in Richtung eines Masseanschlusses der Beleuchtungseinrichtung. Beim Verbauen der Beleuchtungseinrichtung in einem Karosserieausschnitt des Fahrzeugs auftretende Potentialdifferenzen zwischen einem Reflektor und der Karosserie des Fahrzeugs wird durch die Ladungsableitungsmittel ausgeglichen, ohne dass auf einem Träger der Lichtquelle angeordnete elektrische Bauteile einer Steuereinrichtung, wie beispielsweise Transistoren, Dioden und dergleichen, zerstört werden können. Diese elektrischen Bauteile können beispielsweise zu Diagnosezwecken, für den Überspannungsschutz oder zur Ansteuerung von Leuchtdioden eingesetzt werden.The invention makes it possible by charge discharge means a targeted outflow of a short relatively high electric current in the direction of a ground terminal of the lighting device. Potential differences between a reflector and the body of the vehicle occurring during installation of the illumination device in a body cutout of the vehicle are determined by the charge deflection means balanced, without that on a support of the light source arranged electrical components of a control device, such as transistors, diodes and the like, can be destroyed. These electrical components can be used, for example, for diagnostic purposes, for overvoltage protection or for driving light-emitting diodes.

Nach einer bevorzugten Ausführungsform der Erfindung ist als Ladungsableitungsmittel ein Ladungsleitungspfad vorgesehen, der an einem ersten Ende direkt mit dem Reflektor und an einem zweiten Ende direkt mit einem Masseanschluss des Trägers oder einer Zentralsteckeinrichtung der Beleuchtungseinrichtung kontaktiert ist. Vorteilhaft kann hierdurch eine gezielte Ladungsableitung unter Umgehung von elektrisch leitenden Flächen des Trägers im Falle einer elektrostatischen Aufladung des Reflektors erzielt werden. Reflektoren im Sinne der Erfindung sind alle Kunststoffflächen, die geeignet sind, elektrostatisch aufgeladen zu werden und in Kontakt oder in der Nähe des Trägers der Lichtquellen angeordnet sind.According to a preferred embodiment of the invention, a charge conduction path is provided as a charge dissipation means, which is contacted directly at a first end with the reflector and at a second end directly to a ground terminal of the carrier or a central connector of the illumination device. Advantageously, a targeted discharge of charge can thereby be achieved, bypassing electrically conductive surfaces of the carrier in the case of an electrostatic charging of the reflector. Reflectors in the context of the invention are all plastic surfaces which are suitable to be electrostatically charged and are arranged in contact or in the vicinity of the support of the light sources.

Zusätzlich kann der erfindungsgemäße Ladungsableitungspfad auch dazu dienen, die elektromagnetische Verträglichkeit der Beleuchtungseinrichtung zu verbessern. Auf die Leiterplatte wirkende elektromagnetische Störungen, die dazu führen könnten, dass Bauteile des Trägers in undefinierte Zustände geraten, wie beispielsweise das Aufglimmen von Leuchtdioden, Durchsteuern von Transistoren werden durch die gezielte Ableitungsmöglichkeit des elektrischen Stromes verhindert.In addition, the charge dissipation path according to the invention can also serve to improve the electromagnetic compatibility of the illumination device. On the circuit board acting electromagnetic interference that could lead to components of the carrier in undefined states, such as the glimmer of light-emitting diodes, driving through transistors are prevented by the targeted derivation of the electric current.

Nach einer bevorzugten Ausführungsform der Erfindung ist der Ladungsableitungspfad über ein Kontaktfederelement und/oder über ein Steckelement elektrisch und mechanisch mit dem Reflektor gekoppelt. Vorteilhaft kann hierdurch zum einen eine sichere elektrische Verbindung und zum anderen eine relativ einfache mechanische Verbindung zwischen dem Reflektor und dem Ladungsableitungspfad hergestellt werden.According to a preferred embodiment of the invention, the charge dissipation path is electrically and mechanically coupled to the reflector via a contact spring element and / or via a plug-in element. Advantageously, this can be used to produce a secure electrical connection and, secondly, a relatively simple mechanical connection between the reflector and the charge dissipation path.

Nach einer ersten Ausführungsform der Erfindung kann der Ladungsableitungspfad in einem Lampenträger zur Aufnahme einer Mehrzahl von Glühlampen für eine Lichtfunktion integriert sein. Der Ladungsableitungspfad kann als gesonderter Ableitungsleiter zusammen mit weiteren elektrischen Leitern als ein Stanzgitter des Lampenträgers ausgebildet sein. Zur elektrostatischen Entladung kann somit in dem Lampenträger eine gezielte Ladungsableitung erfolgen.According to a first embodiment of the invention, the charge dissipation path can be integrated in a bulb holder for receiving a plurality of light bulbs for a light function. The charge dissipation path can be formed as a separate dissipation conductor together with further electrical conductors as a stamped grid of the lamp carrier. For electrostatic discharge can thus take place in the bulb holder targeted charge discharge.

Nach einer weiteren Ausführungsform der Erfindung kann der Ladungsableitungspfad als eine stromableitende Leiterbahn ausgebildet sein, die in einem als Leiterplatte ausgebildeten Leuchtelemente-Träger integriert ist. Vorteilhaft kann hierdurch der Ladungsableitungspfad platzsparend und kostengünstig hergestellt werden.According to a further embodiment of the invention, the charge dissipation path can be formed as a current-conducting conductor track, which is integrated in a light-emitting element carrier designed as a printed circuit board. Advantageously, the charge dissipation path can thereby be produced in a space-saving and cost-effective manner.

Nach einer Weiterbildung der Erfindung ist das erste Ende der stromableitenden Leiterbahn als ein Kontaktierungsfleck ausgebildet, der im Bereich einer Befestigungsbohrung der Leiterplatte angeordnet ist. Vorteilhaft kann ein für die Befestigung der Leiterplatte an dem Reflektor vorgesehenes Befestigungselement im Bereich der Befestigungsbohrung mit der stromableitenden Leiterbahn kontaktiert werden, so dass ohne zusätzliche mechanische und elektrisehe Verbindungsmittel eine Kopplung zwischen dem Ladungsableitungspfad einerseits und dem Reflektor andererseits hergestellt werden kann. Vorteilhaft kann hierdurch die Montage vereinfacht werden.According to a development of the invention, the first end of the current-conducting conductor track is formed as a bonding pad, which is arranged in the region of a mounting hole of the printed circuit board. Advantageously, a fastening element provided for fastening the printed circuit board to the reflector can be contacted in the region of the fastening bore with the current-conducting printed conductor, so that without additional mechanical and electrical connections Connecting means a coupling between the charge dissipation path on the one hand and the reflector on the other hand can be made. Advantageously, this assembly can be simplified.

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

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

Es zeigen:

Figur 1
eine teilweisen Vertikalschnitt durch eine Beleuchtungseinrichtung in einem Bereich, in dem ein Lampenträger mit einem Ladungsableitungspfad nach einer ersten Ausführungsform angeordnet ist,
Figur 2
eine Draufsicht auf einen Leuchtelement-Träger,
Figur 3
einen Schnitt durch die Beleuchtungseinrichtung im Bereich eines Leuchtelemente-Trägers mit einem Ladungsableitungspfad nach einer zweiten Ausführungsform und
Figur 4
einen teilweisen Schnitt durch die Beleuchtungseinrichtung im Bereich des LeuchtelementeTrägers mit einem Ladungsableitungspfad nach einer dritten Ausführungsform.
Show it:
FIG. 1
a partial vertical section through a lighting device in a region in which a bulb holder is arranged with a charge dissipation path according to a first embodiment,
FIG. 2
a top view of a luminous element carrier,
FIG. 3
a section through the illumination device in the region of a light-emitting element carrier with a charge dissipation path according to a second embodiment and
FIG. 4
a partial section through the illumination device in the region of the LeuchtelementenTrägers with a charge dissipation path according to a third embodiment.

Eine erfindungsgemäße Beleuchtungseinrichtung für Fahrzeuge ist vorzugsweise als Heckleuchte ausgebildet, die mit einem Gehäuse in einem Karosserieausschnitt des Fahrzeugs angeordnet ist.A lighting device according to the invention for vehicles is preferably designed as a tail lamp, which with a housing is arranged in a body cutout of the vehicle.

In dem Gehäuse der Beleuchtungseinrichtung ist als Träger zum einen ein Lampenträger 1 mit einer Mehrzahl von als Glühlampen 2 ausgebildeten Lichtquellen angeordnet zur Erzeugung einer ersten Lichtfunktion, beispielsweise Schlusslicht-, Fahrtrichtungs-, Rückfahrlichtfunktion. Zum anderen ist in dem Gehäuse als Träger ein Leuchtelemente-Träger 3 vorgesehen, der als Leiterplatte eine Mehrzahl von Leuchtelementen 4 (LED) trägt. Die LED-Leuchtelemente 4 dienen zur Erzeugung einer anderen Lichtfunktion, wie beispielsweise einer Bremslichtfunktion.In the housing of the lighting device is arranged as a carrier for a lamp carrier 1 with a plurality of designed as incandescent light sources 2 for generating a first light function, such as taillight, direction of travel, reversing light function. On the other hand, a light-emitting element carrier 3 is provided in the housing as a carrier, which carries a plurality of light-emitting elements 4 (LED) as a printed circuit board. The LED lighting elements 4 serve to generate another light function, such as a brake light function.

Eine Hauptabstrahlrichtung H der von der Beleuchtungseinrichtung erzeugten Lichtbündels vorderen Öffnung des Gehäuses ist mittels einer Lichtscheibe 5 abgedeckt.A main emission direction H of the light bundle generated by the illumination device front opening of the housing is covered by a lens 5.

Wie aus Figur 2 zu ersehen ist, ist die Leiterplatte 3 langgestreckt als Streifen ausgebildet, wobei die LED-Leuchtelemente 4 reihenförmig und in einem Abstand zueinander angeordnet sind. Zwischen den LED-Leuchtelementen 4 sind jeweils Befestigungsbohrungen 6 angeordnet, so dass Befestigungsschrauben 7 als Befestigungsmittel eingreifen können zur Befestigung der Leiterplatte 3 an einem in Hauptabstrahlrichtung H hinter der Leiterplatte 3 angeordneten Reflektor 8. Zu diesem Zweck weist der Reflektor 8 als Befestigungsmittel abragende Befestigungsdome 9 auf, die an einer Rückseite 10 der Leiterplatte 3 anliegen und mit der Befestigungsschraube 7 in Dreheingriff stehen, siehe Figur 4.How out FIG. 2 can be seen, the circuit board 3 is elongated formed as a strip, the LED lighting elements 4 are arranged in rows and at a distance from each other. Between the LED lighting elements 4 each mounting holes 6 are arranged so that fastening screws 7 can engage as fastening means for mounting the circuit board 3 at a main radiation H behind the printed circuit board 3 arranged reflector 8. For this purpose, the reflector 8 as fastening means projecting Befestigungsdome. 9 on, which rest on a rear side 10 of the printed circuit board 3 and are in rotary engagement with the fastening screw 7, see FIG. 4 ,

Wie aus Figur 1 ersichtlich ist, ist in Hauptabstrahlrichtung H vor dem Lampenträger 1 ein weiterer Reflektor 11 vorgesehen, zur Lichtführung des von den Glühlampen 2 abgestrahlten Lichtes. Die Reflektoren 8 und 11 bestehen jeweils aus einem Kunststoffmaterial, das mit einem Aluminiumüberzug mittels Bedampfung versehen ist.How out FIG. 1 it can be seen, a further reflector 11 is provided in the main emission direction H in front of the bulb holder 1, for guiding the light emitted by the incandescent lamps 2 light. The reflectors 8 and 11 each consist of a plastic material which is provided with an aluminum coating by means of vapor deposition.

Damit bei Vorhandensein einer elektrostatischen Aufladung der Reflektoren 8, 11 beim Kontaktieren der Beleuchtungseinrichtung 1 an das Bordnetz des Fahrzeuges eine gezielte Ladungsableitung ermöglicht wird, sind nach der Erfindung Ladungsableitungsmittel vorgesehen.Thus, in the presence of an electrostatic charge of the reflectors 8, 11 when contacting the illumination device 1 to the electrical system of the vehicle a targeted charge dissipation is made possible, charge derivation means are provided according to the invention.

Nach einer ersten Ausführungsform der Erfindung gemäß Figur 1 ist auf einer dem Reflektor 11 zugewandten Seite des Lampenträgers 1 ein gesonderter Ladungsableitungspfad 12 vorgesehen, der als elektrischer Ladungsableiter in einem Stanzgitter des Lampenträgers 1 integriert angeordnet ist. Das Stanzgitter umfasst darüber hinaus weitere elektrische Leiter, die zur elektrischen Verbindung der Glühlampen 2 mit einem elektrischen Anschluss 13 des Lampenträgers 1 dienen. Der elektrische Anschluss 13 weist eine Mehrzahl von Kontaktelementen auf, die mit einem Zentralstecker 14 einer Zentralsteckeinrichtung elektrisch und mechanisch verbindbar ist, wobei der Zentralstecker 14 über ein Kabel mit dem Bordnetz des Fahrzeugs verbunden ist.According to a first embodiment of the invention according to FIG. 1, a separate charge discharge path 12 is provided on a side of the lamp support 1 facing the reflector 11, which is arranged integrated as an electric charge conductor in a stamped grid of the lamp support 1. The stamped grid moreover comprises further electrical conductors which serve for electrical connection of the incandescent lamps 2 to an electrical terminal 13 of the lamp carrier 1. The electrical connection 13 has a plurality of contact elements, which can be electrically and mechanically connected to a central plug 14 of a central plug-in device, wherein the central plug 14 is connected via a cable to the electrical system of the vehicle.

Der Ladungsableitungspfad 12 ist an einem ersten Ende 15 desselben über ein Kontaktfederelement 16 elektrisch und mechanisch mit einem Wandungsabschnitt 17 des Reflektors 11 verbunden. Das Kontaktfederelement 16 ist aus einem elektrisch leitenden Material hergestellt und weist einen U-förmigen Abschnitt 18 auf, mittels dessen es klemmend mit dem Wandungsabschnitt 17 des Reflektors 11 verbunden ist. Ferner weist das Kontaktfederelement 16 einen V-förmigen Abschnitt 19 auf, der auf das erste Ende 15 des Ladungsableiters 12 drückt.The charge dissipation path 12 is electrically and mechanically connected to a wall portion 17 of the reflector 11 at a first end 15 thereof via a contact spring element 16. The contact spring element 16 is made of an electrically conductive material and has a U-shaped portion 18, by means of which it is clamping is connected to the wall portion 17 of the reflector 11. Furthermore, the contact spring element 16 has a V-shaped portion 19 which presses on the first end 15 of the charge arrester 12.

Ein zweites Ende 20 des Ladungsableiters 12 ist mit einem Masseanschluss M des Lampenträgeranschlusses 13 verbunden. Durch die Stromableitungsmittel ergibt sich eine direkt Kontaktierung zwischen dem Reflektor 8 einerseits und dem Masseanschluss M des Lampenträgers 1 andererseits.A second end 20 of the charge arrester 12 is connected to a ground terminal M of the lamp carrier terminal 13. By Stromableitungsmittel results in a direct contact between the reflector 8 on the one hand and the ground terminal M of the lamp holder 1 on the other.

Nach einer zweiten Ausführungsform der Erfindung gemäß Figur 3 kann der Ladungsableitungspfad als ein Stromleitungskabel 21 ausgebildet sein, das sich im Raum zwischen dem Reflektor 8 und einem Masseanschluss M des Lampenträgeranschlusses 13 oder der Beleuchtungseinrichtung erstreckt. Im vorliegenden Ausführungsbeispiel ist der Masseanschluss M der Beleuchtungseinrichtung in dem elektrischen Anschluss 13 des Lampenträgers 1 integriert angeordnet. Ein erstes Ende des Stromleitungskabels 21 ist über ein Steckelement 22 mechanisch und elektrisch mit einem stegförmigen Wandungsabschnitt 23 des Reflektors 8 verbunden. Wie aus Figur 3 zu ersehen ist, erstreckt sich das Stromleitungskabel 21 zusammen mit einem Stromkabel 24 der Leiterplatte 3 zu dem Anschluss 13 des Lampenträgers 1. Beispielsweise können das Stromleitungskabel 21 und das Stromkabel 24 durch Vercrimpen miteinander verbunden sein. Das Stromkabel 24 ist wie das Stromleitungskabel 21 über einen Randkontaktstecker 22' mit Anschlussleiterbahnen der Leiterplatte 3 verbunden.According to a second embodiment of the invention according to Figure 3, the charge dissipation path may be formed as a power cable 21 extending in the space between the reflector 8 and a ground terminal M of the lamp support terminal 13 or the illumination device. In the present exemplary embodiment, the ground connection M of the illumination device is arranged integrated in the electrical connection 13 of the lamp carrier 1. A first end of the power line cable 21 is mechanically and electrically connected via a plug-in element 22 to a web-shaped wall section 23 of the reflector 8. How out FIG. 3 can be seen, the power cable 21 extends together with a power cable 24 of the circuit board 3 to the terminal 13 of the lamp support 1. For example, the power cable 21 and the power cable 24 may be interconnected by crimping. The power cable 24 is like the power cable 21 via a peripheral contact plug 22 'connected to connecting tracks of the circuit board 3.

Nach einer weiteren Ausführungsform der Erfindung gemäß Figur 4 ist ein Ladungsableitungspfad als eine ladungsableitende Leiterbahn 25 ausgebildet, die sich auf der dem Reflektor 8 zugewandten Rückseite 10 der Leiterplatte 3 erstreckt. Ein erstes Ende der ladungsableitenden Leiterbahn 25 ist als ein Kontaktierungsfleck 26 ausgebildet, der sich im Bereich einer Stirnseite der Leiterplatte 3 zugewandten Befestigungsbohrung 6 erstreckt. Der Kontaktierungsfleck 26 erstreckt sich ringförmig um die Befestigungsbohrung 6. Im Bereich des Kontaktierungsflecks 26 weist die Leiterplatte 3 keine Kupferschichten auf. Der Kontaktierungsfleck 26 kann beispielsweise - wie die ladungsableitende Leiterbahn selbst - durch Aufbringen von Lötzinn erzeugt werden.According to a further embodiment of the invention according to FIG. 4 is a charge dissipation path as a charge-draining Conductor 25 is formed, which extends on the reflector 8 facing the rear side 10 of the printed circuit board 3. A first end of the charge-dissipating interconnect 25 is formed as a bonding pad 26 which extends in the region of a front side of the circuit board 3 facing mounting hole 6. The bonding pad 26 extends annularly around the mounting hole 6. In the region of the bonding pad 26, the printed circuit board 3 has no copper layers. The bonding pad 26 can be produced, for example, by the application of solder, like the charge-dissipating conductive track itself.

Das erste Ende der ladungsableitenden Leiterbahn 25 befindet sich somit in einem Befestigungsbereich zwischen der Leiterplatte 3 und dem Reflektor 8. In diesem Befestigungsbereich steht die Befestigungsschraube 7 in Schraubeingriff mit dem Befestigungsdom 9 des Reflektors 8, wobei der Befestigungsdom 9 mit einer freien Stirnfläche an dem Kontaktierungsfleck 26 anliegt.The first end of the charge-dissipating interconnect 25 is thus located in a mounting area between the circuit board 3 and the reflector 8. In this mounting area, the fastening screw 7 is in screw engagement with the mounting dome 9 of the reflector 8, wherein the mounting dome 9 with a free end face on the bonding pad 26 is present.

Ein zweites Ende der ladungsableitenden Leiterbahn 25 ist mit dem Masseanschluss M der Leiterbahnen der auf der Leiterplatte 3 aufgebrachten Schaltung verbunden. Im Bereich des so gebildeten Energiespeisanschlusses der Leiterplatte 3 ist ein stirnseitig aufsteckbares Steckelement 27 angeordnet, von dem ein Stromkabel 28 zu dem elektrischen Anschluss 13 des Lampenträgers 1 führt.A second end of the charge-discharging conductor 25 is connected to the ground terminal M of the tracks of the circuit mounted on the printed circuit board 3. In the region of the energy supply connection of the printed circuit board 3 thus formed, a plug-in element 27 which can be plugged on at the end is arranged, from which a power cable 28 leads to the electrical connection 13 of the lamp support 1.

Durch die ladungsableitende Leiterbahn 25 wird auf herstellungstechnisch einfache Weise eine direkte Ladungsableitung von dem Reflektor 8 in Richtung des Masseanschlusses M einer Zentralsteckeinrichtung bewirkt, so dass auf der Rückseite 10 der Leiterplatte 3 angeordnete elektronische Bauteile 29, wie beispielsweise Transistoren oder dergleichen, bei einer elektrostatischen Entladung des Reflektors 8 nicht beschädigt werden.The charge-dissipating conductor 25 causes a direct discharge of charge from the reflector 8 in the direction of the ground connection M of a central plug-in device in a manner which is simple in terms of production technology, so that the rear side 10 of the printed circuit board 3 arranged electronic components 29, such as transistors or the like, are not damaged in an electrostatic discharge of the reflector 8.

Nach einer alternativen nicht dargestellten Ausführungsform kann die Leiterplatte ausschließlich zur Ansteuerung von ortsfern angeordneten Lichtquellen (LED-Leuchtelementen) dienen, wobei die Leiterplatte ausschließlich mit elektronischen Bauteilen für die Ansteuerung, jedoch nicht mit LED-Leuchtelementen bestückt ist.According to an alternative embodiment, not shown, the circuit board can be used exclusively for controlling remote light sources (LED lighting elements), wherein the circuit board is equipped exclusively with electronic components for the control, but not with LED lighting elements.

Nach einer alternativen Ausführungsform der Erfindung kann die Beleuchtungseinrichtung auch als Scheinwerfer oder als in einem Innenraum des Fahrzeugs angeordnete Innenleuchte ausgebildet sein. Die erfindungsgemäße Beleuchtungseinrichtung kann überall dort eingesetzt werden, wo metallische Flächen vorhanden sind, die zu einer unerwünschten elektrischen Aufladung führen könnten.According to an alternative embodiment of the invention, the illumination device may also be designed as a headlight or as arranged in an interior of the vehicle interior light. The lighting device according to the invention can be used wherever metallic surfaces are present, which could lead to an undesirable electrical charge.

Claims (10)

  1. An illuminating device for vehicles, in particular rear lights, comprising a housing which contains at least one light source, a support accommodating the light source and a reflector and with a clear lens for covering an opening of the housing, characterised in that charge dissipation means (12, 21, 25) are assigned to the reflector (8, 11) which is provided with an electrically conductive coating such that when the electrostatic charging of the reflector (8, 11) takes place a dissipation current flows to an earth connection (M) of the illuminating device.
  2. The illuminating device according to claim 1, characterised in that the charge dissipation means provides a charge dissipation path (12, 21, 25) which at a first end (15) of the latter is electrically connected to a wall section (17) of the reflector (11) and at a second end of the latter is electrically connected to an earth connection (M) of the support (1, 3) or the central plug device of the illuminating device.
  3. The illuminating device according to claim 1 or 2, characterised in that the first end (15) of the charge dissipation path (21, 21, 25) is electrically and mechanically coupled to the wall section (17) of the reflector (8, 11) via a spring contact connector element (16) or a plug element (22).
  4. The illuminating device according to any of claims 1 to 3, characterised in that the charge dissipation path is designed as an electric charge dissipator (12) which forms a stamped grid together with additional electric conductors, which is integrated into a support designed in the form of a lamp support (1) for at least one light bulb (2).
  5. The illuminating device according to claim 4, characterised in that the spring contact element (16) has a U-shaped section (18) for connecting detachably to the reflector (11) and also a V-shaped section (19) for connecting to the first end (15) of the charge dissipation path (12) of the lamp support (1).
  6. The illuminating device according to any of claims 1 to 5, characterised in that the charge dissipation path is designed as a charge dissipating track (25) which extends on a printed board (3) fitted with a plurality of LEDs (4) as light sources.
  7. The illuminating device according to claim 6, characterised in that the first end of the charge dissipating track (25) is a contact pad (26) extending around the edge of a fixing bore (6) of the printed board (3) for accommodating a fixing means (7) for securing the printed board (3) to the reflector (8), wherein a fixing element (9) of said reflector (8) contacts said contact pad (26) at least partially.
  8. The illuminating device according to any of claims 1 to 7, characterised in that the printed board (3) comprises a plurality of electronic components (29) on a side (10) facing away from the light elements (4).
  9. The illuminating device according to any of claims 1 to 8, characterised in that the charge dissipation path is in the form of an electrically conductive cable (21) which extends between the plug element (22) detachably fixed to the reflector and the earth connection (M) of the electric connection (13) of the printed board (3) or the earth connection (M) of the central plug device of the illuminating device.
  10. The illuminating device according to any of claims 1 to 9, characterised in that the central plug device of the illuminating device and/or the electric connection (13) of the lamp support (1) is arranged on a rear face of the housing.
EP08784383.5A 2007-08-10 2008-07-24 Illuminating device for vehicles Active EP2178722B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200720011255 DE202007011255U1 (en) 2007-08-10 2007-08-10 Lighting device for vehicles
PCT/DE2008/001209 WO2009021482A1 (en) 2007-08-10 2008-07-24 Illuminating device for vehicles

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EP2178722A1 EP2178722A1 (en) 2010-04-28
EP2178722B1 true EP2178722B1 (en) 2017-12-13

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US (1) US8337061B2 (en)
EP (1) EP2178722B1 (en)
CN (1) CN101808855B (en)
DE (2) DE202007011255U1 (en)
WO (1) WO2009021482A1 (en)

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JP5708082B2 (en) * 2010-03-24 2015-04-30 信越化学工業株式会社 Pattern forming method and negative resist composition
DE102010047899B4 (en) * 2010-10-11 2021-11-18 HELLA GmbH & Co. KGaA Lighting device
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JP6441652B2 (en) * 2014-02-12 2018-12-19 株式会社小糸製作所 Vehicle lighting
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FR3052538B1 (en) * 2016-06-09 2018-07-20 Valeo Vision LUMINOUS DEVICE FOR A MOTOR VEHICLE INCORPORATING MEANS FOR PROTECTING ELECTROSTATIC DISCHARGES
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JP3720224B2 (en) * 1999-10-19 2005-11-24 株式会社小糸製作所 Vehicle headlamp
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US20100202151A1 (en) 2010-08-12
WO2009021482A1 (en) 2009-02-19
US8337061B2 (en) 2012-12-25
EP2178722A1 (en) 2010-04-28
DE112008002760A5 (en) 2010-07-08
CN101808855B (en) 2013-06-19
CN101808855A (en) 2010-08-18
DE202007011255U1 (en) 2007-11-29

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