EP2179217B1 - Dispositif d'éclairage - Google Patents

Dispositif d'éclairage Download PDF

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Publication number
EP2179217B1
EP2179217B1 EP08785463.4A EP08785463A EP2179217B1 EP 2179217 B1 EP2179217 B1 EP 2179217B1 EP 08785463 A EP08785463 A EP 08785463A EP 2179217 B1 EP2179217 B1 EP 2179217B1
Authority
EP
European Patent Office
Prior art keywords
lighting apparatus
housing
reflector
electrically conductive
electromagnetic radiation
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
EP08785463.4A
Other languages
German (de)
English (en)
Other versions
EP2179217A1 (fr
Inventor
Ralph Vollmer
Thomas Reiners
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 EP2179217A1 publication Critical patent/EP2179217A1/fr
Application granted granted Critical
Publication of EP2179217B1 publication Critical patent/EP2179217B1/fr
Active legal-status Critical Current
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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
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/275—Lens surfaces, e.g. coatings or surface structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/37—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors characterised by their material, surface treatment or coatings
    • 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
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • 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
    • 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
    • F21S45/10—Protection of lighting devices
    • 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
    • F21V15/00—Protecting lighting devices from damage
    • F21V15/01—Housings, e.g. material or assembling of housing parts
    • 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
    • F21V23/02—Arrangement of electric circuit elements in or on lighting devices the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
    • 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
    • F21V25/00—Safety devices structurally associated with lighting devices
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F21V7/24—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • 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 device with electromagnetic radiation emitting components, in particular using light emitting diodes (LEDs), as well as a vehicle lighting.
  • LEDs light emitting diodes
  • the switched-mode power supply When using a switched-mode power supply to drive an LED, the switched-mode power supply typically emits high-frequency electromagnetic radiation in the range of more than 100 kHz, which can lead to EMC problems with other electronic components. This is a problem, especially in the automotive sector, where a large number of electronic components are gathered in the smallest of spaces.
  • switching power supplies are usually operated in an independent, completely shielded housing. This is elaborate and voluminous and heavy.
  • US 5,006,763 discloses a lighting device with an electrically conductive housing, in the interior of which at least one electrodeless HID lamp is arranged, and with an electrically conductive cover, wherein the cover and the housing are electrically connected to each other, wherein the cover comprises an optical element.
  • the lighting device has an at least partially electrically conductive housing, in the interior of which at least a light source, in particular LED, and at least one electromagnetic radiation emitting circuit component for operating the at least one light source are arranged. Furthermore, the lighting device has an electrically conductive cover for covering at least part of the circuit components, wherein the cover and the housing are electrically connected to each other.
  • the cover and the usually grounded housing thereby form a Faraday cage which shields electromagnetic radiation.
  • the interior of the Faraday cage forms a shielded receiving space for receiving the circuit components.
  • the housing only needs to be electrically conductive insofar as it can form the shielded receiving space.
  • the housing may have an open side through which light emitted by the at least one light source is emitted to the outside.
  • the light source accommodating housing also for accommodating the radiating components can be dispensed with a separate, complete housing for shielding the radiating components. This results in compact dimensions and weight and cost savings.
  • the board on which the radiating components are mounted need not be carried out particularly. It is the use of a single-sided board with a minimum number of layers possible, which for example, a cost savings over using multi-layer, double-sided boards with ground plate allows, which could possibly also be used for shielding.
  • the lighting device is particularly well suited for shielding components whose electromagnetic radiation has a frequency of about 100 KHz or more.
  • the cover comprises an optical element for the beam guidance of the light emitted by the at least one light source in the form of a reflector, wherein the light source is guided through the central opening of the reflector.
  • the reflector preferably has a metallization, for. B. on a non-conductive basic form.
  • the reflector is made of metal, for. B. in the deep drawing process.
  • the reflector is preferably supported electrically conductive on the housing, for. B. without further fasteners.
  • the reflector is preferably connected to the housing by means of an electrically conductive adhesive.
  • the reflector is preferably connected by means of an electrically conductive mechanical connecting element with the housing, for. B. a metal clip.
  • the optical element preferably has a light-transmitting, electrically conductive coating, wherein the coating is particularly preferably electrically connected to the housing.
  • the coating is electrically connected to the housing by means of an electrically conductive adhesive connected is.
  • any other suitable electrically conductive compound may be used, e.g. B. a solder joint.
  • the cover comprises a light-transmitting, non-jet-forming closing element, in particular a cover disk.
  • the terminating element has a light-transmitting, electrically conductive coating which is electrically connected to the housing, in particular if the coating is electrically connected to the housing by means of an electrically conductive adhesive.
  • Preferred is a lighting device in which the housing is made of metal.
  • a lighting device may be preferred in which the housing is made of conductive, in particular metallized, plastic.
  • a lighting device in which the housing is formed as a heat sink, for. B. by providing cooling fins, but also without cooling fins.
  • a lighting device in which the at least one electromagnetic radiation-emitting circuit component is connected to at least one electronic filter element for reducing electromagnetic radiation of electrical supply lines is preferred.
  • Such a lighting device in a vehicle, for. B. as a headlight, turn signal, tail light, brake light, side light, low beam, and so on.
  • the at least one LED may be a single LED or comprise multiple LEDs.
  • the multiple LEDs can be arranged in groups, so-called LED clusters.
  • the LEDs can be monochrome or different colors.
  • the LED cluster can have a plurality of differently colored LEDs, preferably suitable for white additive color mixing, for. B. the type RGB, RRGB, RGGB, etc.
  • the LEDs can spectrally pure or mixed radiate. Also includes LEDs that emit IR or UV light. Also included are LEDs with wavelength-converting material, e.g. B. based on phosphorus, z. B. to convert from blue to yellow light.
  • FIG. 1 shows an inventive lighting device 1 with an electrically conductive, about an optical axis O rotationally symmetrical housing 2, the interior 3 has a single-sided opening 4.
  • a one-sided populated, non-shielding board 5 is mounted, which is equipped on one side with an LED 6 and components 7 of a switching power supply for driving the LED 6 on its upper side.
  • the components 7 are fed by supply lines, not shown, which are led through the housing 2.
  • an electrically conductive reflector 8 is placed, which has a central opening (without reference numeral), through which the LED 6 is guided.
  • the reflector 8 covers the components 7 of the switched-mode power supply and thereby provides, together with the housing 2, a receiving space 9 for these components 7.
  • the reflector 8 and the housing 2 are electrically connected to one another by an electrically conductive adhesive which is located at the interface 10 between reflector 8 and housing 2 is located.
  • a Faraday cage is formed which prevents electromagnetic radiation from running out of or into the receiving space 9.
  • the reflector 8 is made of metal, optionally with protective layers, and is produced by thermoforming.
  • the housing is not rotationally symmetrical, but elongated, in which case FIG. 1 the longitudinal axis is perpendicular to the page plane.
  • This case is particularly suitable for juxtaposing multiple LEDs, which have a common reflector, z. B. to build an elongated light, z. B. a high-mounted brake light.
  • the reflector may have a suitably connected to the housing, in particular large-scale metallization, for. B. applied to a plastic body. This metallization can then also be used for light reflection
  • the reflector to the housing may possibly already its mechanical support on the housing, ie without adhesive connection sufficient.
  • the ground connection can be given for example by a mechanical tensioning device made of metal.
  • FIG. 2 shows a lighting device 11, which now differs from that of FIG. 1 instead of a reflector of a projection lens 12 served as (secondary) optics, which covers the opening 4 and a transparent, electrically conductive coating 13 has.
  • the coating 13 is connected by an electrically conductive adhesive 14 to the housing, whereby now the EMC shielding or formation of the receiving space 15 by the housing 2 and the lens 12 and its coating 13 takes place.
  • the coating 13 may comprise, for example, InO: Sn, ZnO: Al or carbon nanotubes.
  • the electrically conductive coating 13 may be applied to the inside or outside of the lens 12.
  • a primary optics 16 for beam shaping of the light emitted by the LED 6 is arranged between the LED 6 and the lens 12.
  • the housing need not be rotationally symmetrical, but may for example also be elongated, especially when using multiple LEDs.
  • FIG. 3 shows a lighting device 17, in which now in contrast to the embodiment of FIG. 2 instead of the lens a translucent lens 18 is present without significant visual effect.
  • the cover plate 18 also has a transparent, electrically conductive coating 19, which in this example is connected to the housing by an electrically conductive adhesive 20, as a result of which the EMC shield or formation of the receiving space 21 through the housing 2 and the cover plate 18 or the coating 19 takes place.
  • the coating 19 may, for example InO: Sn, ZnO: include AI or carbon nanotubes.
  • the electrically conductive coating 19 may be applied to the inside or outside of the lens 18 without significant optical effect.
  • the present invention is not limited to the present embodiments.
  • the shape of the interior may be different, z. B. not square in cross-section, but arbitrarily shaped.
  • the housing can also be designed as a heat sink and can be z. B. Identify cooling fins.
  • the housing can also consist of metallized or metal-reinforced plastic or another suitable electrically conductive material or composite material.
  • no single LED needs to be used as the light source, but it is also possible, for example, to use LED clusters of a plurality of differently colored LEDs whose colors are mixed together in an additive manner.
  • the invention is not limited to LEDs, but may include other suitable light sources that require radiating elements to drive them, e.g. B. laser diodes.
  • radiant elements can be accommodated, which are not needed to drive the LEDs, but for other purposes.
  • the invention is not limited to an automotive application, but may include any suitable lighting application.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Power Engineering (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Led Device Packages (AREA)

Claims (14)

  1. Dispositif d'éclairage (1) avec un boîtier électriquement conducteur (2) dans l'espace intérieur (3) duquel sont disposés au moins une source de lumière (6), en particulier une LED, et des composants de circuit (7) émettant au moins un rayonnement électromagnétique pour faire fonctionner la ou les sources de lumière (6), et avec un couvercle électriquement conducteur (8 ; 12, 13 ; 18, 19) pour recouvrir les composants de circuit (7), dans lequel le couvercle (8 ; 12, 13 ; 18, 19) et le boîtier (2) sont reliés ensemble électriquement, dans lequel le couvercle (8) comprend un élément optique pour guider la lumière émise par la source de lumière (6) sous la forme d'un réflecteur (8) et dans lequel la source de lumière (6) est guidée à travers une ouverture centrale du réflecteur (8).
  2. Dispositif d'éclairage (1) selon la revendication 1, dans lequel le rayonnement électromagnétique présente une fréquence d'environ 100 KHz ou plus.
  3. Dispositif d'éclairage (1) selon l'une quelconque des revendications précédentes dans lequel le réflecteur comporte une métallisation.
  4. Dispositif d'éclairage (1) selon l'une des revendications 1 à 2, dans lequel le réflecteur (8) est constitué de métal.
  5. Dispositif d'éclairage (1) selon l'une des revendications précédentes, dans lequel le réflecteur (8) est maintenu sur le boîtier (2) de manière électriquement conductrice.
  6. Dispositif d'éclairage (1) selon l'une des revendications précédentes, dans lequel le réflecteur (8) est relié au boîtier (2) au moyen d'un adhésif électriquement conducteur.
  7. Dispositif d'éclairage (1) selon l'une des revendications précédentes, dans lequel le réflecteur est relié au boîtier (2) au moyen d'un élément de liaison mécanique électriquement conducteur.
  8. Dispositif d'éclairage (1) selon l'une des revendications précédentes, dans lequel le boîtier (2) est constitué de métal.
  9. Dispositif d'éclairage (1) selon l'une des revendications 1 à 7, dans lequel le boîtier est constitué d'une matière plastique conductrice, en particulier métallisée.
  10. Dispositif d'éclairage (1) selon l'une des revendications précédentes, dans lequel le boîtier est réalisé sous la forme d'un corps de refroidissement.
  11. Dispositif d'éclairage (1) selon l'une des revendications précédentes, dans lequel les composants de circuit (7) émettant au moins un rayonnement électromagnétique sont reliés à au moins un élément électronique de filtrage pour réduire le rayonnement électromagnétique des lignes électriques d'amenée.
  12. Dispositif d'éclairage (1) selon l'une des revendications précédentes, dans lequel la ou les sources de lumière comporte ou comportent au moins une LED (6).
  13. Dispositif d'éclairage (1) selon la revendication 12, dans lequel les composants de circuit (7) émettant au moins un rayonnement électromagnétique comprennent au moins un composant d'une alimentation à découpage.
  14. Éclairage de véhicule comportant un dispositif d'éclairage (1) selon l'une des revendications précédentes.
EP08785463.4A 2007-08-10 2008-08-08 Dispositif d'éclairage Active EP2179217B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007037822A DE102007037822A1 (de) 2007-08-10 2007-08-10 Beleuchtungsvorrichtung
PCT/EP2008/006570 WO2009021694A1 (fr) 2007-08-10 2008-08-08 Dispositif d'éclairage

Publications (2)

Publication Number Publication Date
EP2179217A1 EP2179217A1 (fr) 2010-04-28
EP2179217B1 true EP2179217B1 (fr) 2019-03-13

Family

ID=39944323

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08785463.4A Active EP2179217B1 (fr) 2007-08-10 2008-08-08 Dispositif d'éclairage

Country Status (6)

Country Link
US (1) US8602620B2 (fr)
EP (1) EP2179217B1 (fr)
JP (1) JP5416102B2 (fr)
CN (1) CN101688659B (fr)
DE (1) DE102007037822A1 (fr)
WO (1) WO2009021694A1 (fr)

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Publication number Publication date
EP2179217A1 (fr) 2010-04-28
JP2010531037A (ja) 2010-09-16
DE102007037822A1 (de) 2009-02-12
CN101688659A (zh) 2010-03-31
US8602620B2 (en) 2013-12-10
JP5416102B2 (ja) 2014-02-12
US20110038172A1 (en) 2011-02-17
CN101688659B (zh) 2013-01-23
WO2009021694A1 (fr) 2009-02-19

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