EP2291594B1 - Unité d éclairage pour phare de véhicule et phare de véhicule - Google Patents

Unité d éclairage pour phare de véhicule et phare de véhicule Download PDF

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Publication number
EP2291594B1
EP2291594B1 EP09772310.0A EP09772310A EP2291594B1 EP 2291594 B1 EP2291594 B1 EP 2291594B1 EP 09772310 A EP09772310 A EP 09772310A EP 2291594 B1 EP2291594 B1 EP 2291594B1
Authority
EP
European Patent Office
Prior art keywords
lighting unit
housing
heat sink
emitting diode
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.)
Not-in-force
Application number
EP09772310.0A
Other languages
German (de)
English (en)
Other versions
EP2291594A1 (fr
Inventor
Peter Frey
Christian Meier
Jürgen Beck
Siegfried FÖRSTNER
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.)
Osram GmbH
Original Assignee
Osram GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Osram GmbH filed Critical Osram GmbH
Publication of EP2291594A1 publication Critical patent/EP2291594A1/fr
Application granted granted Critical
Publication of EP2291594B1 publication Critical patent/EP2291594B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/12—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of emitted light
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
    • F21S45/48—Passive cooling, e.g. using fins, thermal conductive elements or openings with means for conducting heat from the inside to the outside of the lighting devices, e.g. with fins on the outer surface of the lighting device
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F21V29/89—Metals
    • 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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—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
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/19—Attachment of light sources or lamp holders
    • 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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/19—Attachment of light sources or lamp holders
    • F21S41/192—Details of lamp holders, terminals or connectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the invention relates to a lighting unit for vehicle headlights according to the preamble of claim 1.
  • Such a lighting unit is for example in the WO 2008/065030 A1 disclosed.
  • This document describes a lighting unit for a vehicle headlight with a light-emitting diode device and a metallic housing, which surrounds the light emitting diode device at least partially and which is provided with fastening means for mounting the lighting unit in a vehicle headlight.
  • These fastening means are designed such that they allow alignment of the LED chips with respect to the optics of the vehicle headlight.
  • the metallic housing can be connected to a heat sink for cooling the LED chips.
  • the production of the metallic housing is comparatively complicated and costly.
  • document JP 2008 098 185 is considered to be the closest prior art and discloses a vehicle headlamp with light-emitting diodes as the light source, each on a cooling device, which is disposed respectively within the housing.
  • the lighting unit according to the invention has a light-emitting diode device, a housing, in the interior of which components of an operating circuit for operating the light-emitting diode device are arranged.
  • the housing consists of electrically insulating material, preferably of plastic, and is provided with adjustment means for aligning the illumination unit in a vehicle headlight, and in the housing electrical connections for powering the illumination unit are embedded, so that they are accessible to mating contacts or socket contacts of a vehicle headlamp are.
  • the light emitting diode device of the lighting unit according to the invention is fixed on a surface of a heat sink made of heat conductive material, which forms a arranged on an outer side of the housing bearing surface for an external cooling system.
  • the combination of the aforementioned features of the lighting unit according to the invention ensures that the housing material can be used for electrical insulation of the electrical connections and the housing can be inexpensively formed, for example, as an injection molded part, in particular as a plastic injection molded part.
  • the heat sink allows a thermal coupling of the light emitting diode device to an external cooling system and thus ensures sufficient cooling or removal of heat from the light emitting diode device during operation of the lighting unit.
  • the first adjustment means ensure alignment of the light-emitting diode device fixed on the metallic heat sink with respect to any optics of the illumination unit and with respect to an optical system of the vehicle headlight.
  • second adjustment means are provided for the relative alignment of light-emitting diode device, housing or heat sink. These second adjustment means facilitate the alignment of their aforementioned components to each other during assembly of the lighting unit.
  • the electrical connections of the lighting unit according to the invention are housed in a trained as a plug or socket housing portion to allow electrical contact between lighting unit and vehicle headlights by means of a simple plug connection.
  • the electrically insulating material of the housing can be used in an advantageous manner for electrical insulation of the electrical connections.
  • the entire housing of the lighting unit or only designed as a plug or socket housing portion may be formed as a plastic injection molded part, in the plastic material, the electrical connections are embedded. As a result, a good fixation and electrical insulation of the electrical connections are achieved.
  • the first adjustment means advantageously comprise at least three protrusions which are arranged along an outer circumference of the housing of the illumination unit according to the invention, in order thereby to serve as a contact surface in the vehicle headlight.
  • the second adjustment means advantageously comprise a portion of the metallic heat sink and boundaries of a matching recess in the housing to prevent in the simplest possible manner rotational movements between the heat sink and the housing and to ensure a defined orientation of the light emitting diode device with respect to the housing.
  • the heat sink preferably has a disc-shaped portion which forms the bearing surface or thermal coupling surface for an external cooling system.
  • the heat sink is preferably made of metal, since metals have a very good thermal conductivity.
  • a metallic heat sink can also be used for the electromagnetic shielding of the lighting unit and of the vehicle headlight.
  • the metallic heat sink is advantageously connected in an electrically conductive manner to an electrical contact, which is at ground reference potential, of a mounting board on which electrical components of the operating circuit are mounted.
  • the metallic reflection surfaces of the vehicle headlight and any metallic housing parts of the vehicle headlamp can also be connected to the ground reference potential to ensure the electromagnetic compatibility of the vehicle headlamp as a whole.
  • the aforesaid disc-shaped portion of the heat sink and the boundaries of a fitting recess in the housing are designed to prevent rotation in order to prevent rotational movements of the heat sink about an axis perpendicular to its disk-shaped section in the housing.
  • the disc-shaped portion of the heat sink for this purpose preferably has a geometry deviating from the rotational symmetry.
  • the second adjustment means advantageously comprise pins attached to the housing, which bear against the metallic heat sink in order to ensure a play-free fit of the metallic heat sink in the housing.
  • the aforementioned webs can compensate for dimensional tolerances in the housing production.
  • the second adjustment means comprise at least three webs, which are integrally formed on the housing and together define a reference plane for the alignment of the light-emitting diode device or the surface of the metallic heat sink on which the light-emitting diode device is fixed.
  • a temperature sensor is preferably attached to the heat sink to monitor the operating temperature of the light emitting diode device. Since the light emitting diode device is fixed on the metallic heat sink, this has the same temperature as the light emitting diode device and offers, in contrast to the light emitting diode device, sufficient space for receiving a temperature sensor.
  • the lighting unit according to the invention can advantageously be used in a vehicle headlight, for example as a fog light or daytime running light or as a low beam or high beam.
  • the primary optics of the illumination unit can be adapted to the aforementioned applications accordingly. It is also also possible to use the lighting unit according to the invention for a direction indicator or as a tail light in the vehicle. For this purpose, for example, a translucent orange or red cover may be used as the primary optic.
  • the lighting unit according to the first embodiment of the invention has a designed as a plastic injection molded housing 200, a metallic heat sink 100 made of aluminum, a sealing ring 300 made of rubber or silicone, a mounting board 400 with thereon arranged electrical components (not shown) and conductor tracks (not shown) and contact surfaces (not shown), a light emitting diode device 500 and a primary optics 600.
  • the FIG. 1 shows an exploded view of the lighting unit with its individual components. In the following, the aforementioned components of this lighting unit and their interaction will be described in more detail.
  • the housing 200 is in one piece and designed as a plastic injection molded part. It has a hollow-cylindrical housing section 210 and a housing section 230 designed as a plug.
  • the hollow-cylindrical housing section 210 has a circular-cylindrical side wall 211 and a bottom 212.
  • the hollow cylindrical housing portion 210 has an outer diameter of 50 millimeters.
  • the circular cylindrical side wall 211 is provided with three elevations 213a, 213b, 213c arranged equidistantly along its outer lateral surface and at the same height above the floor 212, which project outwardly from the lateral surface and which serve as adjustment means for aligning the illumination unit in the vehicle headlight.
  • these three protrusions 213a, 213b, 213c define a reference outer diameter of the hollow cylindrical housing portion 210 for the alignment of the illumination unit in the vehicle headlight.
  • the outer diameter of the housing portion 210 is set to a value with high accuracy.
  • the upper edge 214 of the hollow cylindrical Housing portion 210 is provided with three equidistant along the circumference of the hollow cylindrical housing portion 210 arranged webs 214a, 214b, 214c.
  • These three webs 214a, 214b, 214c form coaxially arranged ring segments, which are integrally formed on the upper edge 214 of the circular-cylindrical side wall 211 and extend in the direction of the cylinder axis of the circular-cylindrical side wall 211.
  • the width of these webs 214a, 214b, 214c that is, their extent in the circumferential direction of the circular cylindrical side wall 211, corresponds to the width or extent of the elevations 213a, 213b, 213c along the outer circumferential surface of the circular cylindrical side wall 211.
  • the webs 214a, 214b, 214c are arranged along the circumference of the circular-cylindrical side wall 211 at the same locations as the protrusions 213a, 213b, 213c.
  • the upper edges of the three webs 214a, 214b, 214c define a plane which is perpendicular to the cylinder axis of the hollow cylindrical housing portion 210 and serves as a reference plane for alignment of the light-emitting diode device 500.
  • the formed as a plug housing portion 230 is formed off-center on the bottom 212 of the hollow cylindrical housing portion 210 on the back.
  • the bottom 212 has a circular disk-shaped, arranged coaxially to the cylinder axis of the hollow cylindrical housing portion 210 opening 215 through which a columnar portion 110 of the metallic heat sink 100 protrudes.
  • the bottom 212 is provided on the inside of the hollow cylindrical housing portion 210 with three pins 216 a, 216 b, 216 c, which are arranged equidistantly along the edge circular disc-shaped aperture 215 and parallel to Direction of the cylinder axis of the hollow cylindrical housing portion 210 extend. These pins 216a, 216b, 216c abut against a circular cylindrical portion 111 of the columnar portion 110 of the metallic heat sink 100 and serve to align the metallic heat sink 100 in the plastic housing 200.
  • the pins 216a, 216b, 216c ensure a play-free fit of the metallic heat sink 100 in the housing 200 and prevent movements of the metallic heat sink 100 in all directions perpendicular to the cylinder axis of the hollow cylindrical housing portion 210.
  • the bottom 212 is provided on the inside with three further pins 217, which also extend parallel to the cylinder axis of the hollow cylindrical housing portion 210 and the Fixing the mounting board 400 serve.
  • the tapered ends of these pins 217 protrude through openings 401 in the mounting board 400 and are hot caulked at the top, that is, at the side facing away from the bottom 212 of the mounting board 400.
  • the circular cylindrical side wall 211 has on its inside an annular collar 218, on which the sealing ring 300 rests.
  • the bottom 212 is also provided with two hollow webs 219, 220, which extend parallel to the cylinder axis of the hollow cylindrical housing portion 210 and are arranged diametrically on the edge of the circular disc-shaped opening 215. These webs 219, 220 serve to fix the primary optics 600.
  • projections 229 a, 229 b are mounted, behind which the holder 610, 620 of the primary optics 600 engages.
  • the bottom 212 protrude a plurality of metal pins 221, which embedded in the plug 230 electrical connections of the lighting unit are electrically connected and which protrude through openings 402 in the mounting board 400 and soldered or welded to tracks or contact surfaces on the mounting board 400 or contacted by Pressfit or press-fit zone.
  • the electrical connections are furthermore connected to metallic contact pins 222, which protrude from the plastic material of the plug 230 and are accessible on the rear side of the lighting unit or of the housing section 230 designed as a plug.
  • the bottom 212 has on the outer side or rear side of the hollow cylindrical housing portion 210 a mating recess 223 for a disk-shaped portion 120 of the metallic heat sink 100.
  • This recess 223 is bounded by a circular arc-shaped wall portion 224 and a rectilinear wall portion 225.
  • a pressure equalization hole 227 attached, which allows in particular for closed systems, a pressure equalization in the vehicle headlight.
  • This pressure equalizing hole 227 is optional and may be covered by a pressure compensating membrane (not shown).
  • From the outside of the circular cylindrical side wall 211 are two reference lugs 228, which serve as a reference for the orientation of the illumination unit in the vehicle headlight. In particular, these reference projections 228 define an unambiguous installation position of the illumination unit in the vehicle headlight.
  • the metallic heat sink 100 is composed of a columnar portion 110 and a disk-shaped portion 120 formed at one end of the columnar portion 110.
  • the rear 120a of the disk-like portion 120 of the metallic heat sink 100 facing away from the columnar portion 110 serves as a support surface for an external cooling system.
  • the columnar portion 110 has a circular-cylindrical portion 111 which directly adjoins the disk-shaped portion 120.
  • the edge of the disk-shaped section 120 is formed by a circular-arc-shaped edge section 121 and a rectilinear edge section 122.
  • the rectilinear edge portion 122 of the heat sink 100 abuts the rectilinear wall portion 225 in the recess 223 and the circular arc-shaped edge portion 121 of the heat sink 100 abuts the circular arc-shaped wall portion of the recess 223.
  • the columnar section 110 of the heat sink 100 protrudes through the opening 215 in the bottom 212 of the hollow cylindrical housing portion 210 and the circular cylindrical portion 111 is free of play on the pin 216a, 216b, 216c.
  • the columnar portion 110 has at its end a plane parallel to the disk-shaped portion 120 extending, planar mounting surface 112, which is bounded by two mutually parallel side edges 113, 114.
  • the light-emitting diode device 500 is adhesively bonded by means of a placement machine in a well-defined orientation and distance from the side edges 113, 114.
  • the mounting surface 112 On both sides of the mounting surface 112 are each a parallel to the mounting surface 112 extending surface 115, 116, which are arranged at a lesser height above the disk-shaped portion 120 and are each provided with a recess 117, 118.
  • the columnar portion 110 of the heat sink 100 projects through an aperture 403 in the mounting board 400 such that the mounting surface 112 lies in the plane defined by the upper edges of the webs 214a, 214b, 214c and the metallic heat sink 100 is adhesively bonded at this level fixed to the housing 200.
  • a temperature sensor is arranged and fixed by means of thermally conductive paste.
  • the temperature sensor monitors the temperature of the light emitting diode device 500 during operation of the illumination device.
  • a metal spring is arranged, which presses with spring action against lying on ground reference potential electrical contact on the mounting board 400.
  • the metallic heat sink 100 is at the ground reference potential connected and becomes part of an electromagnetic shielding of the driver circuits for the light emitting diode device. The electromagnetic compatibility of the lighting unit is thus improved.
  • the sealing ring 300 is made of rubber or silicone and rests on the collar 218 on the inside of the circular cylindrical side wall 211.
  • the mounting board 400 is located, which carries the electrical components of the driver circuit for operating the light emitting diode device.
  • the mounting board 400 is formed in a circular disk shape and has a central opening 403 through which the columnar portion 110 of the metallic heat sink 100 projects with the light-emitting diode device 500 fixed thereon.
  • the mounting board 400, the sealing ring 300, the circular cylindrical side wall 211 and the bottom 212 of the hollow cylindrical housing portion 210 form an interior space.
  • electrical components (not shown) of an operating circuit for operating the light-emitting diode arrangement 500 are arranged and possibly interconnected by conductor tracks which are likewise arranged on the mounting board.
  • the mounting board 400 is preferably multi-layered formed and has in addition to the interconnects on the front and back an inner metal layer (not shown), which is embedded in the electrically insulating material of the mounting board 400 and connected to the ground reference potential of the operating circuit for the light emitting diode device 500 to increase the electromagnetic compatibility of the lighting unit ,
  • the aforementioned inner, lying on ground reference potential metal layer contributes together with the also lying on ground reference potential metallic heat sink 100 for electromagnetic shielding of arranged on the back of the mounting board 400 electrical components of the operating circuit for the light-emitting device 500 at.
  • the mounting board 400 is provided with three holes 401, which are arranged around the central opening 403.
  • the mounting board 400 sits on the pin 217, so that their tapered ends protrude through the openings 401. By hot caulking the tapered ends of the pins 217, the mounting board 400 is fixed to the housing 200.
  • the mounting board 400 also has four further holes 402, which are arranged at its edge, above the plug-formed housing portion 230 and through which the metal pins 221 protrude to allow an electrically conductive connection to contact surfaces on the front side of the mounting board 400.
  • the central opening 403 in the mounting plate 400 is designed so that holders 610, 620 of the primary optics 600 also project through the opening 403 and can engage in the hollow webs 219, 220.
  • the light-emitting diode device 500 consists of five light-emitting diode chips, which are arranged on a carrier plate in a row and surrounded by the walls of a frame. These light-emitting diode chips are provided with a phosphor coating (chip layer coating), which partially converts the blue light generated by the light-emitting diode chips into light of other wavelengths, so that the lighting unit emits white light during its operation.
  • the light-emitting diode chips are, for example, thin-film light-emitting diode chips, the basic principle of which, for example, in US Pat Reference I. Schnitzer et al., Appl. Phys. Lett. 63 (16), 18 October 1993, 2174-2176 is described.
  • the light-emitting diode device 500 is aligned parallel to the side edges 113, 114 by means of a placement machine and glued centrally on the end face 112 of the columnar portion 110 of the metallic heat sink 100 equidistant from the edges of the face 112 serving as a mounting surface.
  • the light-emitting diode device 500 is electrically conductively connected to electrical contacts on the mounting board 400 and is operated by means of the operating circuit whose components are arranged on the mounting board 400.
  • the operating circuit supplies power to the LED chips 500 of the light-emitting diode device 500 and allows control of the electrical power consumption of the light-emitting diode device 500 as a function of the temperature of the light-emitting diode device 500 with the aid of the above-mentioned temperature sensor.
  • the temperature sensor can be designed for this purpose, for example, as a temperature-dependent resistor, in particular as an NTC resistor with a negative temperature characteristic.
  • the primary optics 600 is a transparent, dome-like cover of the light-emitting diode device 500 made of plastic or glass.
  • the primary optics 600 has two hook-shaped holders 610, 620, which are inserted into the hollow webs 219, 220 and whose hooks 611, 621 engage behind the projections 229a, 229b there.
  • the web 220 is provided with a slot having an oval cross section, while the web 219 has a cavity with a circular edge.
  • a clear orientation can also be specified for the primary optics 600. This is significant when the translucent dome-like cover 600 is replaced with primary optics with light directing properties.
  • the dome-like cover 600 can also be omitted or replaced by a primary optics with imaging properties or optical fiber properties, which directs or bundles the light from the light emitting diode device in predetermined spatial directions.
  • FIG. 9 the lighting device according to the first embodiment of the invention is shown in the assembled state of all its individual parts.
  • FIG. 10 shows a lighting unit according to a second embodiment of the invention.
  • This lighting unit differs from the lighting unit according to the first embodiment only in that the lighting unit according to the second embodiment has three fastening devices 241, 242, 243, which are integrally formed on the housing 200 of the lighting unit according to the second embodiment of the invention.
  • the lighting units according to the first and second embodiments of the invention coincide.
  • wear in FIG. 10 identical components the same reference numerals as the corresponding components of the first embodiment, which in the FIGS. 1 to 9 is shown.
  • the three holding devices 241, 242, 243 are provided with holes tabs which are arranged equidistantly along the outer circumference of the hollow cylindrical housing portion 210 of the plastic housing 200.
  • the holes provided with holes 241, 242, 243 are in a common plane perpendicular to the cylinder axis of the hollow cylindrical housing portion 210 and allow attachment of the illumination device by means of screws in the vehicle headlight.
  • the transparent, dome-like cover 600 can be dispensed with or replaced by a primary optic with optical imaging properties.
  • the heat sink may also consist of other metals, such as copper, or of non-metals with good thermal conductivity.

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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)

Claims (11)

  1. Unité d'éclairage pour phare de véhicule avec un dispositif à diodes électroluminescentes (500), un logement (200), dans l'espace intérieur duquel sont disposés des composants d'un circuit de commande permettant de faire fonctionner le dispositif à diodes électroluminescentes (500), dans laquelle
    - le dispositif à diodes électroluminescentes (500) est disposé sur une surface (112) d'un dissipateur thermique (100) en métal,
    caractérisée en ce que
    - le logement (200) est composé d'un matériau électriquement isolant, et des raccords électriques (222) destinés à l'alimentation en tension de l'unité d'éclairage sont intégrés dans le logement (200), et le logement (200) présente des moyens d'ajustement (213a, 213b, 213c) permettant d'orienter l'unité d'éclairage dans un phare de véhicule, et
    - le dissipateur thermique (100) forme une surface d'appui (120a) disposée au niveau d'un côté extérieur du logement (200) pour un système de refroidissement externe, et
    - les composants du circuit de commande sont disposés sur une platine de montage (400), la platine de montage (400) présentant un contact électrique qui se trouve sur le potentiel de référence de masse du circuit de commande et est relié de manière électriquement conductrice avec le dissipateur thermique (100).
  2. Unité d'éclairage selon la revendication 1, dans laquelle les moyens d'ajustement sont formés par au moins trois protubérances (213a, 213b, 213c) qui sont disposées le long d'une périphérie extérieure du logement (200).
  3. Unité d'éclairage selon la revendication 1 ou 2, dans laquelle des deuxièmes moyens d'ajustement (214a, 214b, 214c, 216a, 216b, 216c, 217, 225, 111, 121, 122) sont prévus pour l'orientation relative du dispositif à diodes électroluminescentes (500), du logement (200) ou du dissipateur thermique (100).
  4. Unité d'éclairage selon la revendication 3, dans laquelle les deuxièmes moyens d'ajustement comprennent une section (120) du dissipateur thermique (100) et des délimitations (224, 225) d'un évidement sur mesure (223) dans le logement (200).
  5. Unité d'éclairage selon les revendications 3 et 4, dans laquelle la section en forme de disque (120) et les délimitations (224, 225) de l'évidement sur mesure (223) dans le logement (200) sont configurées en tant que fixation contre la rotation qui empêche une rotation du dissipateur thermique (100) autour d'un axe perpendiculaire à sa section en forme de disque (120) dans l'évidement (223).
  6. Unité d'éclairage selon l'une des revendications 1 à 5, dans laquelle les deuxièmes moyens d'ajustement comprennent au niveau du logement (200) des pivots fixés (216a, 216b, 216c) qui sont en contact avec le dissipateur thermique métallique (100).
  7. Unité d'éclairage selon l'une des revendications 1 à 6, dans laquelle les deuxièmes moyens d'ajustement comprennent au moins trois arêtes (214a, 214b, 214c) qui sont ménagées au niveau du logement (200) et forment ensemble un plan de référence pour l'orientation du dispositif à diodes électroluminescentes (500) ou de la surface (112) du dissipateur thermique (100), sur lequel le dispositif à diodes électroluminescentes (500) est fixé.
  8. Unité d'éclairage selon l'une des revendications 1 à 7, dans laquelle la surface d'appui (120a) est formée par une section en forme de disque (120) du dissipateur thermique (100).
  9. Unité d'éclairage selon l'une des revendications 1 à 8, dans laquelle le logement (200) possède une section configurée en tant que fiche ou douille (230) dans laquelle les raccords électriques (222) sont logés.
  10. Unité d'éclairage selon l'une des revendications 1 à 9, dans laquelle un capteur de température est disposé au niveau du dissipateur thermique (100).
  11. Phare de véhicule avec une unité d'éclairage selon l'une des revendications 1 à 10.
EP09772310.0A 2008-07-02 2009-06-16 Unité d éclairage pour phare de véhicule et phare de véhicule Not-in-force EP2291594B1 (fr)

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DE102008031256A DE102008031256A1 (de) 2008-07-02 2008-07-02 Beleuchtungseinheit für Fahrzeugscheinwerfer und Fahrzeugscheinwerfer
PCT/EP2009/057449 WO2010000610A1 (fr) 2008-07-02 2009-06-16 Unité d’éclairage pour phare de véhicule et phare de véhicule

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WO (1) WO2010000610A1 (fr)

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KR20110028537A (ko) 2011-03-18
WO2010000610A1 (fr) 2010-01-07
US8231254B2 (en) 2012-07-31
KR101594943B1 (ko) 2016-02-18
US20110103076A1 (en) 2011-05-05
JP5409782B2 (ja) 2014-02-05
JP2011526412A (ja) 2011-10-06
CN102084180A (zh) 2011-06-01
DE102008031256A1 (de) 2010-01-07
CN102084180B (zh) 2014-02-05
EP2291594A1 (fr) 2011-03-09

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