EP2095016A1 - Unité d'éclairage pour phare de véhicule, et phare de véhicule correspondant - Google Patents

Unité d'éclairage pour phare de véhicule, et phare de véhicule correspondant

Info

Publication number
EP2095016A1
EP2095016A1 EP07822788A EP07822788A EP2095016A1 EP 2095016 A1 EP2095016 A1 EP 2095016A1 EP 07822788 A EP07822788 A EP 07822788A EP 07822788 A EP07822788 A EP 07822788A EP 2095016 A1 EP2095016 A1 EP 2095016A1
Authority
EP
European Patent Office
Prior art keywords
luminaire
housing
bore
lighting unit
light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP07822788A
Other languages
German (de)
English (en)
Other versions
EP2095016B1 (fr
Inventor
Peter Frey
Ralf Vollmer
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 EP2095016A1 publication Critical patent/EP2095016A1/fr
Application granted granted Critical
Publication of EP2095016B1 publication Critical patent/EP2095016B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • 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]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
    • 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
    • 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
    • F21V19/003—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
    • F21V19/0035—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources the fastening means being capable of simultaneously attaching of an other part, e.g. a housing portion or an optical component
    • 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
    • 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 according to the preamble of claim 1 and a vehicle headlight according to the preamble of claim 6.
  • Such a lighting unit and such a vehicle headlights are disclosed for example in WO 2006/066530 Al.
  • This publication describes an illumination unit with at least one light-emitting diode chip, a housing designed as a heat sink that partially surrounds the at least one light-emitting diode chip, and a holder for fixing the at least one light-emitting diode chip with respect to the heat sink in a unique position and orientation, wherein the heat sink with fastening means is provided for mounting the lighting unit in a vehicle headlight.
  • the fastening means together with the corresponding fastening means on the headlight form a bayonet lock.
  • the lighting unit according to the invention has at least one light-emitting diode chip and a housing at least partially surrounding the at least one light-emitting diode chip, wherein the housing has fastening means for mounting the lighting unit in a vehicle headlight.
  • the fastening means comprise according to the invention at least one projection or depression, the or on Housing arranged and provided for mounting the lighting unit in the lamp, with a matching matched matching counterpart on a light part, z. B. on a reflector of the lamp to act together so that the at least one projection or the at least one recess and the counter-piece fit into each other.
  • the two aforementioned bores and the fittingly interlocking edges of these bores By means of the two aforementioned bores and the fittingly interlocking edges of these bores, a precise alignment of the illumination unit and its at least one light-emitting diode chip and possibly a primary optic placed on the at least one light-emitting diode chip is made in a simple manner with respect to the reflector and in particular with respect to the optical axis of the reflector
  • the light reflecting surfaces of the reflector allows, as the first and second holes can be made very precise, so that only small tolerances of fractions of a millimeter occur in their position and their diameter.
  • the bores are therefore suitable as a reference for the adjustment of the light-emitting diode chip of the illumination unit or the primary optics associated therewith with respect to the light-reflecting surfaces of the reflector.
  • the fastening means according to the invention can be used independently of the shape of the electrical connections of the lighting unit. In particular, they are also suitable for lighting units which have electrical connection
  • the fastening means of the lighting unit at least two projections or recesses, which are arranged on the housing and which are provided for mounting the lighting unit in the lamp to interact with matching matched counterparts on a light portion of the lamp such that the Protrusions or the recesses and the counterparts fit into each other. This ensures a clear installation position of the lighting unit and in particular prevents a rotational movement.
  • Figure 5 is a plan view of the primary optics or cover shown in Figure 4
  • FIG. 6 A representation of all components of the illumination unit according to the first exemplary embodiment depicted in FIGS. 1, 2, 4 and 5
  • FIG. 7 A representation of the illumination unit depicted in FIG. 6 in the mounted state of all components
  • Figure 8 is a plan view of the back of a vehicle headlamp according to the second embodiment of the lamp according to the invention, before mounting the illumination unit shown in Figure 7
  • Figure 9 is a plan view of the back of a vehicle headlamp according to the third embodiment of the lamp according to the invention, before mounting the illumination unit shown in Figure 7
  • the lighting unit comprises a pot-shaped, substantially cylindrically symmetrical housing 100 made of aluminum with a circular disk-like bottom 101 and a, formed on the bottom 101 side wall 102 which extends along the lateral surface of a cylinder.
  • the housing 100 is designed in particular as an aluminum die cast part.
  • the bottom 101 of the housing 100 has on its inside an elevation 103 formed integrally with the bottom 101, which has a high central portion 1030 and two lower lying plateaus 1031, 1032 has.
  • the top of the central portion 1030 has a greater height above the bottom 101 of the housing 100 than the two, on different sides of the central portion arranged plateau 1031, 1032.
  • the light-emitting diode chips 3 are, for example, thin-film light-emitting diode chips whose basic principle is described, for example, in the publication I. Schnitzer et al., Appl. Phys. Lett. 63 (16), 18 October 1993, 2174-2176.
  • the carrier plate 2 is glued by means of a placement machine on the top of the central portion 1030 of the elevation 103 at a predetermined distance and in a well-defined orientation with respect to a arranged on the first plateau 1031, hollow cylindrical web 105 and a disposed on the second plateau 1032 elongated hole 104.
  • the support plate 2 with the light-emitting diode chips 3 arranged thereon is arranged between the oblong hole 104 and the hollow-cylindrical web 105.
  • the slot 104 and the hollow cylindrical web 105 serve to align a dome-like primary optics 400 (FIGS. 4 and 5), which is placed over the light-emitting diode chips 3, so that the light emitted by the light-emitting diode chips 3 or the light-emitting diodes is coupled into the primary optics 400.
  • the primary optics 400 are a translucent, dome-like cover for the light-emitting diode chips 3.
  • the primary optics 400 has two webs 401, 402 which engage in the slot 104 and the hollow-cylindrical web 105 in an appropriate manner.
  • the top or the end of the hollow cylindrical web 105 serves the primary optics 400 as a support surface.
  • Another support surface for the primary optics 400 is provided by a nem web 106 formed with an oval cross section, which is disposed on the first plateau 1031, adjacent to the hollow cylindrical web 105 and the slot 104.
  • the top of the cylindrical hollow web 105 and the web 106 with oval transverse web have the same height above the housing bottom 101 as the top of the central portion 1030.
  • first 1031 and second plateau 1032 two opposing pins 107, 108 are further arranged in the openings 403 , 404 engage the edge of the primary optics 400 to fix them to the housing 100.
  • the elevation 103 has two ear-like projections 109, 110 arranged on different sides of the plateau 1031, each with a pin 1090, 1100.
  • the pins 1090, 1100 are used for riveting a mounting board 500, which rests on the top of the first 1031 and second plateau 1032 and on three other, each provided with a pin 1110, 1120, 1130 bearing surfaces 111, 112, 113.
  • the abovementioned bearing surfaces 111, 112, 113 are arranged equidistantly along the inner side of an annular web 114 running on the inner side of the side wall 102.
  • the mounting board 500 ( Figure 6) has two substantially rectangular openings 501, 502, through which the central portion 1030 and the webs 105, 106 and the pins 107, 108 protrude.
  • the components of an operating device for the LED chips 3 are mounted on the mounting board.
  • the operating device comprises a driver circuit for powering the LED chips 3 and a voltage converter for supplying power to the driver circuit from the vehicle electrical system voltage of the motor vehicle.
  • a trough 115 is formed in the elevation 103, which is filled with a heat-conductive paste.
  • a temperature-dependent resistor (not shown), in particular a so-called NTC (resistance with negative temperature characteristic), arranged, which is in contact with the heat conductive paste and serves as a temperature sensor to the operating temperature of the LED chips. 3 to eat.
  • the side wall 102 has three recesses 1021, 1022, 1023 arranged along the circumference of the housing 100, in each of which a surface 120, 130, 140 extending parallel to the housing bottom 101 is arranged. These surfaces 120, 130, 140 are located at the same height above the housing bottom 101 and are each bounded by a directed into the interior of the housing 100 recess 1141, 1142, 1143 of the annular ridge 114. In the first surface 120 a continuous, in the direction of the housing bottom 101 step-narrowed bore 121 is arranged, which extends from the surface 120 to the outside of the housing bottom 101.
  • the housing bottom 101 In the other two surfaces 130, 140 is also in each case a through bore 131th 141, whose radius corresponds to the radius of the narrow area of the first bore 121, respectively.
  • two apertures 150 are further arranged, which serve for the passage of electrical connection cables for the power supply of mounted on the mounting board components of the operating device.
  • the housing bottom 101 preferably has three further holes for fastening a heat sink (not shown).
  • the recess 122 is provided for receiving a matching matched thereto, on the back 201 of the illustrated in Figure 3 reflector 200 of the vehicle headlamp hollow web 210.
  • the outer diameter of this hollow web 210 is matched to the first, large radius of the bore 121, that is, to the radius of the recess 122.
  • a borehole 211 is arranged, whose radius is identical to the second, small radius of the bore 121 and which serves to screw the housing 100 of the lighting unit with the reflector 200.
  • the screwing is carried out from the outside of the housing bottom 101, wherein the screw is introduced at the outside or back of the bottom 101 in the narrowed portion of the bore 121 and by the screwing finally into the coaxial with the narrow portion of the bore 121 arranged well 211 of Hollow web 210 penetrates.
  • the hollow web 210 thus engages perfectly in the widened region 122 of the bore 121, so that the position of the hollow web 210 and the stepped bore 121 can serve as a reference for aligning the illumination unit or the light-emitting diode chips 3 with respect to the reflector 200.
  • the reflector 200 has on its rear side 201 an annular flange 202 whose dimensions are matched to the annular web 114 of the lighting unit.
  • a sealing ring 600 made of rubber or silicone, which rests after mounting the lighting unit to the annular flange 202 with a press fit. That is, after mounting the lighting unit in the vehicle headlamp, the sealing ring is disposed between the annular flange 202 of the reflector 200 and the annular ridge 114 of the lighting unit.
  • annular flange 202 On the annular flange 202, two further, each with a borehole 221, 231 provided hollow webs 220, 230 are arranged, which are aligned for mounting the lighting unit so that the Bohrlö- rather 221 and 231 arranged coaxially to the bores 131 and 141, respectively are each to introduce a screw from the outside or back of the housing bottom 101 in the bores 131 and 141 and the boreholes 221 and 231 can.
  • the heads of the screws stuck in the bores 121, 131, 141 bear against the outside or rear side of the housing bottom 101 and their tips extend into the boreholes 211, 221, 231 of the corresponding hollow webs 210, 220, 230, to make a screw connection between the housing 100 of the illumination device and the reflector 200 by means of these screws.
  • the first hollow web 210 is formed longer than the other two hollow webs 220, 230 and has a stepped end portion with reduced outer diameter, because it fits into the recess 122 in the surface 120 passes.
  • a pin 203 is formed, which is in a groove 1024 in the side wall 102 of the housing 100 of the illumination unit engages.
  • the pin 203 is diametrically opposite the first hollow web 210.
  • the groove 1024 of the support surface 120 is diametrically opposite.
  • the groove 1024 and the pin 203 together with the first hollow web 210 and the step-like bore 121 prevent a rotation of the illumination unit about its axis of symmetry.
  • a substantially rectangular opening 204 is arranged through which project the LED chips 3 and the primary optics 400 mounted thereon after the mounting of the illumination unit, so that the light emitted by the LED chips 3, after passing through the primary optics 400 incident on the light reflecting surfaces of the reflector 200.
  • the reflector 200 with the illumination unit mounted thereon are part of a vehicle headlamp, preferably a foglamp or a headlamp for daytime running lights or for high beam or low beam.
  • FIG. 8 illustrates a second exemplary embodiment of a reflector 200 'which, instead of the reflector 200 depicted in FIG. 3, can be used together with the illumination unit illustrated in FIGS. 1, 2, 4, 5, 6 and 7 to illuminate a vehicle headlight according to the invention to build.
  • the reflector 200 'shown in FIG. 8 differs from the reflector 200 shown in FIG. 3 only in that it has three webs 203' arranged equidistantly along the outer circumference of the annular flange 202, which extend parallel to the ring axis of the flange 202 and on which Outside the wall 102 of the housing 100 of the illumination unit abut. They serve instead of the pin 203 according to the reflector 200 of the first embodiment shown in Figure 3 as further guide elements for the exact alignment of the reflector 200 'and lighting unit.
  • FIG. 9 shows a third exemplary embodiment of a reflector 200 "which is used instead of the reflector 200 depicted in FIG. 3 or instead of the reflector 200 'depicted in FIG. 8 together with that shown in FIGS. 1, 2, 4, 5, 6 and 7 Lighting unit can be used to a inventive Vehicle headlight form.
  • the reflector 200 "shown in FIG. 9 differs from the reflector 200 'shown in FIG. 8 only in that it has three similar hollow webs 210", 220, 230 for the screw connection of the lighting unit and the reflector and on the extended hollow web 210 with the end section was dispensed with reduced outside diameter.
  • illumination unit and reflector 200 is here only by the mating fit of the three webs 210", 220, 230 and the wall 102 of the housing 100 of the lighting unit and with the aid of the pin 203, as in the embodiment shown in Figure 3 embodiment to engage in the groove 1024 of the wall 102 of the housing 100 of the lighting unit, guaranteed.
  • screws which are inserted into the bores 121, 131, 141 and into the hollow webs 210 ", 220, 230, a connection is made between the lighting unit and the reflector 200".
  • a cooling device which consists for example of cooling fins or is designed as a heat sink, be mounted.

Landscapes

  • 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)

Abstract

L'invention concerne une unité d'éclairage, de préférence pour phare de véhicule, comprenant au moins une puce à diode électroluminescente (3) et un boîtier (100) entourant, au moins partiellement, ladite puce à diode électroluminescente (3), caractérisée en ce que le boîtier (100) présente des moyens de fixation pour le montage de l'unité d'éclairage dans un phare de véhicule, en ce que les moyens de fixation comprennent au moins une saillie ou une cavité (121, 122) disposée sur le boîtier (100) et qui est prévue pour le montage de ladite unité d'éclairage dans la lampe, et en ce qu'au moins la saillie ou la cavité (121, 122) coopère avec une pièce antagoniste adaptée (210) sur un élément de lampe (200), de telle façon qu'au moins la saillie ou au moins la cavité (122) et la pièce antagoniste (210) s'engagent de manière appariée l'une dans l'autre.
EP07822788.1A 2006-11-28 2007-11-21 Unité d'éclairage pour phare de véhicule, et phare de véhicule correspondant Active EP2095016B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202006018081U DE202006018081U1 (de) 2006-11-28 2006-11-28 Beleuchtungseinheit für Fahrzeugscheinwerfer und Fahrzeugscheinwerfer
PCT/EP2007/062650 WO2008065030A1 (fr) 2006-11-28 2007-11-21 Unité d'éclairage pour phare de véhicule, et phare de véhicule correspondant

Publications (2)

Publication Number Publication Date
EP2095016A1 true EP2095016A1 (fr) 2009-09-02
EP2095016B1 EP2095016B1 (fr) 2017-03-08

Family

ID=37763706

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07822788.1A Active EP2095016B1 (fr) 2006-11-28 2007-11-21 Unité d'éclairage pour phare de véhicule, et phare de véhicule correspondant

Country Status (5)

Country Link
US (1) US8303148B2 (fr)
EP (1) EP2095016B1 (fr)
CN (1) CN101553688B (fr)
DE (1) DE202006018081U1 (fr)
WO (1) WO2008065030A1 (fr)

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Also Published As

Publication number Publication date
US8303148B2 (en) 2012-11-06
EP2095016B1 (fr) 2017-03-08
CN101553688A (zh) 2009-10-07
CN101553688B (zh) 2012-03-14
US20100067248A1 (en) 2010-03-18
DE202006018081U1 (de) 2007-02-08
WO2008065030A1 (fr) 2008-06-05

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