EP1519107B1 - Vehicle lamp - Google Patents

Vehicle lamp Download PDF

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Publication number
EP1519107B1
EP1519107B1 EP04022491A EP04022491A EP1519107B1 EP 1519107 B1 EP1519107 B1 EP 1519107B1 EP 04022491 A EP04022491 A EP 04022491A EP 04022491 A EP04022491 A EP 04022491A EP 1519107 B1 EP1519107 B1 EP 1519107B1
Authority
EP
European Patent Office
Prior art keywords
light
emitting diode
vehicle lamp
housing member
housing
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.)
Expired - Fee Related
Application number
EP04022491A
Other languages
German (de)
French (fr)
Other versions
EP1519107A1 (en
Inventor
Gabriele Monika Sachs-Dücker
Cornelius Dr. Neumann
Peter Prenger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hella GmbH and Co KGaA
Original Assignee
Hella KGaA Huek and Co
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 Hella KGaA Huek and Co filed Critical Hella KGaA Huek and Co
Publication of EP1519107A1 publication Critical patent/EP1519107A1/en
Application granted granted Critical
Publication of EP1519107B1 publication Critical patent/EP1519107B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • 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
    • 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
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/241—Light guides characterised by the shape of the light guide of complex shape
    • 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
    • F21S43/235—Light guides
    • F21S43/242—Light guides characterised by the emission area
    • F21S43/243—Light guides characterised by the emission area emitting light from one or more of its extremities
    • 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
    • F21S43/235—Light guides
    • F21S43/247—Light guides with a single light source being coupled into the light guide
    • 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
    • F21S43/31—Optical layout thereof
    • F21S43/315—Optical layout thereof using total internal reflection
    • 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
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/507—Cooling arrangements characterised by the adaptation for cooling of specific components of means for protecting lighting devices from damage, e.g. housings
    • 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
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • 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
    • F21V7/0091—Reflectors for light sources using total internal reflection
    • 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

Definitions

  • the invention relates to a vehicle lamp, having at least one light emitting window having a light emitting diode as a light source and at least one with a light entrance surface facing the light exit window optics for bundling the light emitted from the light emitting diode and a holding device for positioning the light emitting diode to the optics.
  • Such a vehicle lamp is known from WO 99/09349 A1. It has a light-emitting diode which is arranged on a carrier board together with an electrical circuit provided for its control and power supply.
  • the light-emitting diode has a convex light exit window, which faces the light entry surface of an optic. This bundles the light emitted by the light emitting diode in such a way that a predetermined light distribution is achieved.
  • a columnar projection is integrally formed on the optics, which is oriented with its longitudinal axis approximately at right angles to the plane of extension of the optics and passes through a hole provided in the light emitting diode.
  • the LED should be positioned by this measure on the optical axis of the optics.
  • the mounting of the LED on the optics is still relatively complicated, since the LED must be positioned in alignment with the perforations exactly to the columnar projections of the optics in the production of the vehicle lamp.
  • Unfavorable is also that the heat produced during operation of the light-emitting diode is dissipated only relatively poorly to the environment.
  • the vehicle lamp is therefore suitable only for light-emitting diodes with relatively low power.
  • the object is to provide a vehicle lamp of the type mentioned, in which the heat loss produced by the light emitting diode is well derived from the light emitting diode. In addition, it should allow the vehicle lamp in their production easy positioning of the LED on the optics.
  • the holding device has a housing with a first, the optics housing part and a second connected, designed as a cooling element housing part that between them Housing parts a receptacle for the light-emitting diode is formed, in which the light-emitting diode is arranged such that it rests with its side facing away from the light exit window surface on the second housing part, and that on the receptacle and / or the light emitting diode at least one centering element is provided for centering the light entry surface relative to the light exit window.
  • the light-emitting diode is arranged between two housing parts comprising this. Since the optics is connected to the first housing part, the light-emitting diode can be mounted in the manufacture of the vehicle lamp in a simple manner to the optics by the light-emitting diode inserted into the receptacle of the housing and the housing parts are then interconnected.
  • the at least one centering element provided on the receptacle and / or the light-emitting diode makes it possible for the light entry surface or the light emission point of the light-emitting diode to be centered in the connecting position of the housing parts relative to the light exit window.
  • the second housing part is designed as a cooling element with a low heat conduction resistance. This lies flat against the back of the light emitting diode and is thus connected to the light emitting diode with good thermal conductivity.
  • the cooling element may have on its outer side facing away from the LED outside a heat dissipation surface in contact with the ambient air, which is preferably larger than the surface of the light emitting diode. The heat generated during operation of the LED of this heat loss can thus be dissipated via the cooling element effectively to the environment.
  • cooling fins may be provided, whereby a comparatively large heat dissipation surface is made possible with compact dimensions of the second housing part.
  • a high-performance light-emitting diode can be provided, which provides a correspondingly large luminous flux.
  • the at least one centering element has at least one centering bevel, which extends transversely to the optical axis of the light emitting diode.
  • the LED is then centered automatically by means of the inclined surface when connecting the housing parts in the recording.
  • the housing parts may be formed as coupling parts of a plug-in coupling. The housing parts can then be connected to each other in the manufacture of the vehicle lamp by pushing one another in a simple manner.
  • the light-emitting diode has a preferably formed as a metal core board carrier plate on which a light-emitting semiconductor chip is arranged, wherein the carrier plate with its semiconductor chip facing the front surface of the semiconductor chip and with its back flat against the second housing part.
  • a light-emitting diode is commercially available as standard components cost.
  • the good heat-conducting carrier plate of these LEDs has a larger footprint than the semiconductor chip. As a result, a relatively large-area heat-conducting connection between the carrier plate and the second housing part is made possible.
  • the semiconductor chip is preferably arranged on the carrier plate in a housing, which can consist of a plastic casting compound, for example.
  • the light exit window has a convex light outcoupling surface, which preferably extends in a spherical surface arranged concentrically to the light emission point of the light emitting diode, if the light entry surface of the optic is concave and adapted to the light outcoupling surface, and if the receptacle for the light emitting diode is designed such that the light output surface comes into positive engagement with the light entry surface.
  • the light emitting diode is then centered when connecting the housing parts of the holding device directly to the concave light entry surface of the optics, which allows a particularly precise positioning of the light emitting diode to the optics.
  • the first housing part of the holding device has a releasably connectable to the second housing part, preferably designed as a cap part coupling element, said coupling element is preferably formed integrally with the optics.
  • the housing parts of the holding device can then be even easier and faster connected to each other in the manufacture of the vehicle lamp.
  • first and second housing part of the holding device are releasably connectable to each other, preferably by means of a latched in a connecting position bayonet connection.
  • the bayonet connection then allows easy and quick access to the light emitting diode in case of service.
  • the vehicle lamp on a lamp housing with an inner cavity, which has a light exit opening, which is covered by a lens, wherein in the inner cavity at least one socket for receiving the holding device is arranged.
  • the assembly consisting of the holding device with the housing parts and the light-emitting diode can then be completely pre-assembled in the production of the vehicle lamp and then easily inserted into the socket of the lamp housing.
  • the second housing part of the holding device is formed integrally with the lamp housing.
  • the number of components to be connected together is reduced accordingly.
  • a heat transfer surface between the second housing part and the lamp housing is avoided, so that the heat emitted by the LED heat loss can be better dissipated to the outside of the lamp housing.
  • an optical gel is arranged between the light exit window of the light emitting diode and the light entrance surface of the optical system whose optical refractive index corresponds approximately to the refractive index of the light exit window and the optics.
  • the optics is embodied as a light guide body, in which the light of the light-emitting diode coupled in through the light entry surface is guided by utilizing the total reflection at the boundary surfaces of the light guide body.
  • the coupled to the light entry surface in the light guide light of the light emitting diode can then be passed in the light guide largely lossless to a light exit surface.
  • a vehicle lamp has a non-illustrated in the drawing lamp housing with a closed inner cavity.
  • the luminaire housing has a light exit opening, which is covered by a lens.
  • a socket is arranged, in which a holding device, generally designated 1, is inserted, which has a receptacle for a light-emitting diode 2.
  • the holding device 1 has a housing with a first housing part 3 and a second housing part 4 connected thereto.
  • An optic 5 for bundling the light emitted by the light-emitting diode 2 is arranged on the first housing part 3.
  • the optic 5 is a light guide with a light entrance surface 6 and formed of a light-emitting surface 7 spaced therefrom.
  • the light entry surface 6 faces a light exit window 8 of the light emitting diode 2 and the light exit surface 7 of the light disc.
  • the optic 5 is designed in such a way that a light distribution provided for the illumination function assigned to the light-emitting diode 2 is achieved in the emission region of the light exit surface 7.
  • the second housing part 4 of the holding device 1 is formed as a solid cooling element made of a metallic material. Between the first housing part 3 and the second housing part 4, the receptacle for the light-emitting diode 2 is formed. In Fig. 2 it can be seen that the receptacle in the second housing part 4 has an approximately cylindrical inner cavity into which a portion of the light emitting diode 2 is inserted.
  • the light-emitting diode 2 has an approximately circular disk-shaped metal core board 10, on which a light-emitting semiconductor chip not shown in the drawing is arranged, which is integrated in a light-emitting diode housing 11.
  • a light-emitting semiconductor chip not shown in the drawing is arranged, which is integrated in a light-emitting diode housing 11.
  • the light exit window 8 Arranged on the light-emitting diode housing 11 is the light exit window 8 which, with its rear side, faces a light emission point 12 of the semiconductor chip and has a light output surface 13 on its front side.
  • electrical connection contacts 14 are led out laterally, which are connected via bonding wires to power supply terminals of the semiconductor chip.
  • the terminal contacts 14 are connected via not shown in the drawing power supply lines to a drive circuit which is connected to the battery of the vehicle.
  • the light-emitting diode 2 is arranged in such a way in the receptacle of the holding device 1 that it rests with the side facing away from the semiconductor chip rear side of the metal core board 11 at the bottom of the receiving surface on the second housing part 4.
  • the front of the metal core board is flat against the semiconductor chip. Thereby, the heat generated by the semiconductor chip can be well dissipated to the environment.
  • the first housing part 3 has a coupling element 15 designed as a cap part. This is detachably connectable to a mating counter-coupling element 16 of the second housing part 4.
  • the coupling element 15 and the counter-coupling element 16 form a bayonet connection.
  • the counter-coupling element 16 has on its outer circumference three coupling projections 17 which engage in the locking position in each case an undercut of the coupling element 15. With the aid of a locking element 18, the bayonet connection is locked in the connecting position.
  • the locking element 18 is formed as a step or step, which is arranged on one of the coupling projections 17.
  • the coupling element 15 and the optics 5 are formed as an integral with each other injection molded part.
  • the coupling element 15 and the optics 5 are produced as separate parts and then connected together in particular by latching, gluing and / or welding.
  • the light output surface 13 of the light exit window 8 is convex and extends in a spherical surface, which is arranged concentrically to the light emitting point 12 of the light emitting diode 2.
  • the light entry surface 6 of the optic 5 is designed to be concave and to match the light outcoupling surface 13 of the light exit window 8.
  • the light entry surface 6 and the light outcoupling surface 13 form centering bevels which extend transversely to the optical axis 19 of the light emitting diode 2.
  • the receptacle for the light emitting diode 2 is designed such that the light outcoupling surface 13 comes into positive engagement with the light entry surface 6.
  • the housing parts 3, 4 form abutments, between which the light-emitting diode 2 is arranged.
  • the light emitting point 12 of the light emitting diode 2 when connecting the housing parts 3, 4 automatically centered relative to the light entry surface 6 of the optics 5.
  • the holding device 1 thus enables self-centering of the light-emitting diode 2.
  • a gap may be formed in regions between the light output surface 13 and the light entry surface 6.
  • an optical gel may be arranged, whose optical refractive index corresponds approximately to the refractive index of the light exit window 8 and the optics 5.
  • the optic 5 between the light entry surface 6 and the light exit surface 7 has an inner cavity 20, which is designed as an air lens.
  • the inner cavity 20 passes through the optics 5 approximately at right angles to their extension plane corresponding to the plane of the drawing in FIG. 5.
  • the inner cavity 20 is arranged approximately centrally to the optical axis 19 of the light emitting diode 2 in a central region of the light beam emitted by the light emitting diode 2.
  • the optic 5 can also be designed as a lens or reflector.

Description

Die Erfindung betrifft eine Fahrzeugleuchte, mit mindestens einer ein Lichtaustrittsfenster aufweisenden Leuchtdiode als Lichtquelle und mit wenigstens einer mit einer Lichteintrittsfläche dem Lichtaustrittsfenster zugewandten Optik zum Bündeln des von der Leuchtdiode abgestrahlten Lichts sowie mit einer Halteeinrichtung zum Positionieren der Leuchtdiode an der Optik.The invention relates to a vehicle lamp, having at least one light emitting window having a light emitting diode as a light source and at least one with a light entrance surface facing the light exit window optics for bundling the light emitted from the light emitting diode and a holding device for positioning the light emitting diode to the optics.

Eine derartige Fahrzeugleuchte ist aus WO 99/09349 A1 bekannt. Sie weist eine Leuchtdiode auf, die zusammen mit einem zu ihrer Ansteuerung und Stromversorgung vorgesehenen elektrischen Schaltkreis auf einer Trägerplatine angeordnet ist. Die Leuchtdiode hat ein konvexes Lichtaustrittsfenster, das der Lichteintrittsfläche einer Optik zugewandt ist. Diese bündelt das von der Leuchtdiode abgestrahlte Licht derart, dass eine vorgegebene Lichtverteilung erreicht wird. Seitlich neben der Lichteintrittsfläche der Optik ist beidseits der Leuchtdiode jeweils ein säulenförmiger Vorsprung an die Optik angeformt, der mit seiner Längsachse etwa rechtwinklig zur Erstreckungsebene der Optik orientiert ist und eine in der Leuchtdiode vorgesehene Lochung durchsetzt. Nach Angabe der Offenlegungsschrift soll die Leuchtdiode durch diese Maßnahme auf der optischen Achse der Optik positioniert werden. Die Montage der Leuchtdiode an der Optik ist jedoch noch relativ kompliziert, da die Leuchtdiode bei der Fertigung der Fahrzeugleuchte mit ihren Lochungen exakt zu den säulenförmigen Vorsprüngen der Optik fluchtend an dieser positioniert werden muss. Ungünstig ist außerdem, dass die beim Betrieb der Leuchtdiode von dieser produzierte Wärme nur relativ schlecht an die Umgebung abgeführt wird. Die Fahrzeugleuchte ist deshalb nur für Leuchtdioden mit relativ geringer Leistung geeignet.Such a vehicle lamp is known from WO 99/09349 A1. It has a light-emitting diode which is arranged on a carrier board together with an electrical circuit provided for its control and power supply. The light-emitting diode has a convex light exit window, which faces the light entry surface of an optic. This bundles the light emitted by the light emitting diode in such a way that a predetermined light distribution is achieved. On each side of the light entry surface of the optics on both sides of the light emitting diode in each case a columnar projection is integrally formed on the optics, which is oriented with its longitudinal axis approximately at right angles to the plane of extension of the optics and passes through a hole provided in the light emitting diode. According to the disclosure, the LED should be positioned by this measure on the optical axis of the optics. However, the mounting of the LED on the optics is still relatively complicated, since the LED must be positioned in alignment with the perforations exactly to the columnar projections of the optics in the production of the vehicle lamp. Unfavorable is also that the heat produced during operation of the light-emitting diode is dissipated only relatively poorly to the environment. The vehicle lamp is therefore suitable only for light-emitting diodes with relatively low power.

Somit besteht die Aufgabe, eine Fahrzeugleuchte der eingangs genannten Art zu schaffen, bei der die von der Leuchtdiode produzierte Verlustwärme gut von der Leuchtdiode abgeleitet wird. Außerdem soll es die Fahrzeugleuchte bei ihrer Fertigung eine einfache Positionierung der Leuchtdiode an der Optik ermöglichen.Thus, the object is to provide a vehicle lamp of the type mentioned, in which the heat loss produced by the light emitting diode is well derived from the light emitting diode. In addition, it should allow the vehicle lamp in their production easy positioning of the LED on the optics.

Die Lösung dieser Aufgabe besteht darin, dass die Halteeinrichtung ein Gehäuse mit einem ersten, die Optik aufweisenden Gehäuseteil und einem damit verbundenen zweiten, als Kühlelement ausgebildeten Gehäuseteil aufweist, dass zwischen diesen Gehäuseteilen eine Aufnahme für die Leuchtdiode gebildet ist, in der die Leuchtdiode derart angeordnet ist, dass sie mit ihrer dem Lichtaustrittsfenster abgewandten Rückseite flächig an dem zweiten Gehäuseteil anliegt, und dass an der Aufnahme und/oder der Leuchtdiode wenigstens ein Zentrierelement vorgesehen ist, zum Zentrieren der Lichteintrittsfläche relativ zu dem Lichtaustrittsfenster.The solution to this problem is that the holding device has a housing with a first, the optics housing part and a second connected, designed as a cooling element housing part that between them Housing parts a receptacle for the light-emitting diode is formed, in which the light-emitting diode is arranged such that it rests with its side facing away from the light exit window surface on the second housing part, and that on the receptacle and / or the light emitting diode at least one centering element is provided for centering the light entry surface relative to the light exit window.

Erfindungsgemäß ist also eine Art Sandwichaufbau vorgesehenen, bei der die Leuchtdiode zwischen zwei diese umfassende Gehäuseteilen angeordnet ist. Da die Optik mit dem ersten Gehäuseteil verbunden ist, kann die Leuchtdiode bei der Fertigung der Fahrzeugleuchte auf einfache Weise an der Optik montiert werden, indem die Leuchtdiode in die Aufnahme des Gehäuses eingesetzt und die Gehäuseteile dann miteinander verbunden werden. Dabei ermöglicht das wenigstens eine an der Aufnahme und/oder der Leuchtdiode vorgesehene Zentrierelement, dass die Lichteintrittsfläche bzw. die Lichtabstrahlstelle der Leuchtdiode in Verbindungsstellung der Gehäuseteile relativ zu dem Lichtaustrittsfenster zentriert ist. In vorteilhafter Weise ist das zweite Gehäuseteil als Kühlelement mit einem geringen Wärmeleitungswiderstand ausgebildet. Dieses liegt flächig an der Rückseite der Leuchtdiode an und ist somit gut wärmeleitend mit der Leuchtdiode verbunden. Das Kühlelement kann an seiner der Leuchtdiode abgewandten Außenseite eine mit der Umgebungsluft in Kontakt befindliche Wärmeableitfläche aufweisen, die vorzugsweise größer ist als die Oberfläche der Leuchtdiode. Die beim Betrieb der Leuchtdiode von dieser erzeugte Verlustwärme kann somit über das Kühlelement wirksam an die Umgebung abgeführt werden. An der Außenseite des Kühlelements können Kühlrippen vorgesehen sein, wodurch bei kompakten Abmessungen des zweiten Gehäuseteils eine vergleichsweise große Wärmeableitfläche ermöglicht wird. Als Leuchtdiode kann eine Hochleistungsleuchtdiode vorgesehenen sein, die einen entsprechend großen Lichtstrom bereitstellt.According to the invention, therefore, a type of sandwich construction is provided, in which the light-emitting diode is arranged between two housing parts comprising this. Since the optics is connected to the first housing part, the light-emitting diode can be mounted in the manufacture of the vehicle lamp in a simple manner to the optics by the light-emitting diode inserted into the receptacle of the housing and the housing parts are then interconnected. In this case, the at least one centering element provided on the receptacle and / or the light-emitting diode makes it possible for the light entry surface or the light emission point of the light-emitting diode to be centered in the connecting position of the housing parts relative to the light exit window. Advantageously, the second housing part is designed as a cooling element with a low heat conduction resistance. This lies flat against the back of the light emitting diode and is thus connected to the light emitting diode with good thermal conductivity. The cooling element may have on its outer side facing away from the LED outside a heat dissipation surface in contact with the ambient air, which is preferably larger than the surface of the light emitting diode. The heat generated during operation of the LED of this heat loss can thus be dissipated via the cooling element effectively to the environment. On the outside of the cooling element cooling fins may be provided, whereby a comparatively large heat dissipation surface is made possible with compact dimensions of the second housing part. As a light emitting diode, a high-performance light-emitting diode can be provided, which provides a correspondingly large luminous flux.

Vorteilhaft ist, wenn das wenigstens eine Zentrierelement mindestens eine Zentrierschräge aufweist, die quer zur optischen Achse der Leuchtdiode verläuft. Die Leuchtdiode zentriert sich dann mit Hilfe der Schrägfläche beim Verbinden der Gehäuseteile in der Aufnahme selbständig. Die Gehäuseteile können als Kupplungsteile einer Steckkupplung ausgebildet sein. Die Gehäuseteile können dann bei der Fertigung der Fahrzeugleuchte durch Aufeinanderstecken auf einfache Weise miteinander verbunden werden.It is advantageous if the at least one centering element has at least one centering bevel, which extends transversely to the optical axis of the light emitting diode. The LED is then centered automatically by means of the inclined surface when connecting the housing parts in the recording. The housing parts may be formed as coupling parts of a plug-in coupling. The housing parts can then be connected to each other in the manufacture of the vehicle lamp by pushing one another in a simple manner.

Bei einer bevorzugten Ausführungsform der Erfindung weist die Leuchtdiode eine vorzugsweise als Metallkernplatine ausgebildete Trägerplatte auf, auf der ein lichtemittierender Halbleiterchip angeordnet ist, wobei die Trägerplatte mit ihrer dem Halbleiterchip zugewandten Vorderseite flächig an dem Halbleiterchip und mit ihrer Rückseite flächig an dem zweiten Gehäuseteil anliegt. Derartige Leuchtdioden sind als Standard-Bauelemente kostengünstig im Handel verfügbar. Die gut wärmeleitende Trägerplatte dieser Leuchtdioden weist eine größere Grundfläche auf als der Halbleiterchip. Dadurch wird eine relativ großflächige wärmeleitende Verbindung zwischen der Trägerplatte und dem zweiten Gehäuseteil ermöglicht. Der Halbleiterchip ist auf der Trägerplatte bevorzugt in einem Gehäuse angeordnet, das beispielsweise aus einer Kunststoffvergussmasse bestehen kann.In a preferred embodiment of the invention, the light-emitting diode has a preferably formed as a metal core board carrier plate on which a light-emitting semiconductor chip is arranged, wherein the carrier plate with its semiconductor chip facing the front surface of the semiconductor chip and with its back flat against the second housing part. Such light-emitting diodes are commercially available as standard components cost. The good heat-conducting carrier plate of these LEDs has a larger footprint than the semiconductor chip. As a result, a relatively large-area heat-conducting connection between the carrier plate and the second housing part is made possible. The semiconductor chip is preferably arranged on the carrier plate in a housing, which can consist of a plastic casting compound, for example.

Vorteilhaft ist, wenn das Lichtaustrittsfenster eine konvexe Lichtauskoppelfläche aufweist, die sich vorzugsweise in einer konzentrisch zur Lichtabstrahlstelle der Leuchtdiode angeordneten Kugeloberfläche erstreckt, wenn die Lichteintrittsfläche der Optik konkav und zu der Lichtauskoppelfläche passend ausgebildet ist, und wenn die Aufnahme für die Leuchtdiode derart ausgebildet ist, dass die Lichtauskoppelfläche formschlüssig an der Lichteintrittsfläche zur Anlage kommt. Die Leuchtdiode wird dann beim Verbinden der Gehäuseteile der Halteeinrichtung unmittelbar an der konkaven Lichteintrittsfläche der Optik zentriert, was eine besonders präzise Positionierung der Leuchtdiode an der Optik ermöglicht.It is advantageous if the light exit window has a convex light outcoupling surface, which preferably extends in a spherical surface arranged concentrically to the light emission point of the light emitting diode, if the light entry surface of the optic is concave and adapted to the light outcoupling surface, and if the receptacle for the light emitting diode is designed such that the light output surface comes into positive engagement with the light entry surface. The light emitting diode is then centered when connecting the housing parts of the holding device directly to the concave light entry surface of the optics, which allows a particularly precise positioning of the light emitting diode to the optics.

Bei einer zweckmäßigen Ausgestaltung der Erfindung weist das erste Gehäuseteil der Halteeinrichtung ein lösbar mit dem zweiten Gehäuseteil verbindbares, vorzugsweise als Überwurfteil ausgebildetes Kupplungselement auf, wobei dieses Kupplungselement vorzugsweise einstückig mit der Optik ausgebildet ist. Die Gehäuseteile der Halteeinrichtung können dann bei der Fertigung der Fahrzeugleuchte noch leichter und schneller miteinander verbunden werden.In an expedient embodiment of the invention, the first housing part of the holding device has a releasably connectable to the second housing part, preferably designed as a cap part coupling element, said coupling element is preferably formed integrally with the optics. The housing parts of the holding device can then be even easier and faster connected to each other in the manufacture of the vehicle lamp.

Vorteilhaft ist, wenn das erste und zweite Gehäuseteil der Halteeinrichtung lösbar miteinander verbindbar sind, vorzugsweise mittels einer in einer Verbindungsstellung verrasteten Bajonett-Verbindung. Die Bajonett-Verbindung ermöglicht dann im Servicefall einen einfachen und schnellen Zugang zu der Leuchtdiode.It is advantageous if the first and second housing part of the holding device are releasably connectable to each other, preferably by means of a latched in a connecting position bayonet connection. The bayonet connection then allows easy and quick access to the light emitting diode in case of service.

Bei einer vorteilhaften Ausführungsform der Erfindung weist die Fahrzeugleuchte ein Leuchtengehäuse mit einer Innenhöhlung auf, das eine Lichtaustrittsöffnung hat, die durch eine Lichtscheibe abgedeckt ist, wobei in der Innenhöhlung mindestens eine Fassung zur Aufnahme der Halteeinrichtung angeordnet ist. Die aus der Halteeinrichtung mit den Gehäuseteilen und der Leuchtdiode bestehende Baugruppe kann dann bei der Fertigung der Fahrzeugleuchte fertig vormoniert und danach auf einfache Weise in die Fassung des Leuchtengehäuses eingesetzt werden.In an advantageous embodiment of the invention, the vehicle lamp on a lamp housing with an inner cavity, which has a light exit opening, which is covered by a lens, wherein in the inner cavity at least one socket for receiving the holding device is arranged. The assembly consisting of the holding device with the housing parts and the light-emitting diode can then be completely pre-assembled in the production of the vehicle lamp and then easily inserted into the socket of the lamp housing.

Bei einer anderen vorteilhaften Ausführungsform der Erfindung ist das zweite Gehäuseteil der Halteeinrichtung einstückig mit dem Leuchtengehäuse ausgebildet. Bei der Fertigung der Fahrzeugleuchte ist dann die Anzahl der miteinander zu verbindenden Bauteile entsprechend reduziert. Außerdem wird eine Wärmeübergangsfläche zwischen dem zweiten Gehäuseteil und dem Leuchtengehäuse vermieden, so dass die von der Leuchtdiode abgegebene Verlustwärme noch besser zur Außenseite des Leuchtengehäuses abgeführt werden kann.In another advantageous embodiment of the invention, the second housing part of the holding device is formed integrally with the lamp housing. In the production of the vehicle lamp then the number of components to be connected together is reduced accordingly. In addition, a heat transfer surface between the second housing part and the lamp housing is avoided, so that the heat emitted by the LED heat loss can be better dissipated to the outside of the lamp housing.

Bei einer bevorzugten Ausführungsform der Erfindung ist zwischen dem Lichtaustrittsfenster der Leuchtdiode und der Lichteintrittsfläche der Optik ein Optik-Gel angeordnet ist, dessen optischer Brechungsindex etwa dem Brechungsindex des Lichtaustrittsfensters und der Optik entspricht. Dadurch wird auch beim Auftreten von Fertigungstoleranzen ein Luftspalt zwischen dem Lichtaustrittsfenster der Leuchtdiode und der Lichteintrittsfläche der Optik vermieden und das an dem Lichtaustrittsfenster austretende Licht wird ohne gebrochen zu werden an der Lichteintrittsfläche in die Optik eingekoppelt. Bei der Konstruktion der Fahrzeugleuchte kann dann die für die Erzielung einer gewünschten Lichtverteilung erforderliche Geometrie der Optik mit vergleichsweise geringem Aufwand und somit kostengünstig bestimmt werden.In a preferred embodiment of the invention, an optical gel is arranged between the light exit window of the light emitting diode and the light entrance surface of the optical system whose optical refractive index corresponds approximately to the refractive index of the light exit window and the optics. As a result, an air gap between the light exit window of the light emitting diode and the light entrance surface of the optics is avoided even when manufacturing tolerances occur and the emerging at the light exit window light is coupled without being broken at the light entry surface into the optics. In the construction of the vehicle lamp, the geometry of the optics required for achieving a desired light distribution can then be determined with comparatively little effort and thus cost-effectively.

Bei einer zweckmäßigen Ausgestaltung der Erfindung ist die Optik als Lichtleitkörper ausgebildet, in dem das durch die Lichteintrittsfläche eingekoppelte Licht der Leuchtdiode unter Ausnutzung der Totalreflexion an den Grenzflächen des Lichtleitkörpers geführt wird. Das an der Lichteintrittsfläche in den Lichtleitkörper eingekoppelte Licht der Leuchtdiode kann dann in dem Lichtleitkörper weitgehend verlustfrei zu einer Lichtaustrittsfläche geleitet werden.In an expedient embodiment of the invention, the optics is embodied as a light guide body, in which the light of the light-emitting diode coupled in through the light entry surface is guided by utilizing the total reflection at the boundary surfaces of the light guide body. The coupled to the light entry surface in the light guide light of the light emitting diode can then be passed in the light guide largely lossless to a light exit surface.

Nachfolgend ist ein Ausführungsbeispiel der Erfindung anhand der Zeichnung näher erläutert. Es zeigt:

Fig. 1
eine Seitenansicht einer ein erstes und ein zweites Gehäuseteil aufweisenden Halteeinrichtung für eine Leuchtdiode einer Fahrzeugleuchte,
Fig. 2
eine dreidimensionale Ansicht des zweites Gehäuseteils mit der darin angeordneten Leuchtdiode,
Fig. 3
eine Ansicht auf die Vorderseite des ersten Gehäuseteils mit einer daran angeordneten Optik zum Bündeln des von der Leuchtdiode abgestrahlten Lichts,
Fig. 4
eine Ansicht auf die der Leuchtdiode zugewandte Innenseite des ersten Gehäuseteils,
Fig. 5
einen Längsschnitt durch die in Fig. 1 gezeigte Baugruppe, bestehend aus der Halteeinrichtung und der Leuchtdiode, wobei die Schnittebene der Erstreckungsebene der Optik entspricht, und
Fig. 6
einen Längsschnitt durch die in Fig. 1 gezeigte Baugruppe, bestehend aus der Halteeinrichtung und der Leuchtdiode, wobei die Schnittebene rechtwinklig zur Erstreckungsebene der Optik verläuft.
An exemplary embodiment of the invention is explained in more detail below with reference to the drawing. It shows:
Fig. 1
a side view of a first and a second housing part having holding means for a light emitting diode of a vehicle lamp,
Fig. 2
a three-dimensional view of the second housing part with the light-emitting diode arranged therein,
Fig. 3
a view of the front of the first housing part with an optics arranged thereon for bundling the light emitted by the light emitting diode,
Fig. 4
a view of the LED facing the inside of the first housing part,
Fig. 5
a longitudinal section through the assembly shown in Figure 1, consisting of the holding device and the light emitting diode, wherein the sectional plane of the extension plane of the optics corresponds, and
Fig. 6
a longitudinal section through the assembly shown in Fig. 1, consisting of the holding device and the light emitting diode, wherein the cutting plane is perpendicular to the plane of extension of the optics.

Eine Fahrzeugleuchte weist ein in der Zeichnung nicht näher dargestelltes Leuchtengehäuse mit einer geschlossenen Innenhöhlung auf. Das Leuchtengehäuse hat eine Lichtaustrittsöffnung, die durch eine Lichtscheibe abgedeckt ist. An dem der Lichtscheibe gegenüberliegenden Boden des Leuchtengehäuses ist eine Fassung angeordnet, in die eine im Ganzen mit 1 bezeichneten Halteeinrichtung eingesetzt ist, die eine Aufnahme für eine Leuchtdiode 2 hat.A vehicle lamp has a non-illustrated in the drawing lamp housing with a closed inner cavity. The luminaire housing has a light exit opening, which is covered by a lens. At the bottom of the lamp housing opposite the lens, a socket is arranged, in which a holding device, generally designated 1, is inserted, which has a receptacle for a light-emitting diode 2.

In Fig. 1 ist erkennbar, dass die Halteeinrichtung 1 ein Gehäuse mit einem ersten Gehäuseteil 3 und einem damit verbundenen zweiten Gehäuseteil 4 aufweist. An dem ersten Gehäuseteil 3 ist eine Optik 5 zum Bündeln des von der Leuchtdiode 2 abgestrahlten Lichts angeordnet. Die Optik 5 ist als Lichtleitkörper mit einer Lichteintrittsfläche 6 und einer davon beabstandeten Lichtaustrittsfläche 7 ausgebildet. Die Lichteintrittsfläche 6 ist einem Lichtaustrittsfenster 8 der Leuchtdiode 2 und die Lichtaustrittsfläche 7 der Lichtscheibe zugewandt. Zwischen der Lichteintrittsfläche 6 und der Lichtaustrittsfläche 7 wird das durch die Lichteintrittsfläche 7 in Optik 5 eingekoppelte Licht der Leuchtdiode 2 unter Ausnutzung der Totalreflexion den Seitenbegrenzungsflächen 9 der Optik 5 in dieser geführt. Die Optik 5 ist derart ausgebildet, dass im Abstrahlbereich der Lichtaustrittsfläche 7 eine für die der Leuchtdiode 2 zugeordnete Beleuchtungsfunktion vorgesehene Lichtverteilung erreicht wird.In Fig. 1 it can be seen that the holding device 1 has a housing with a first housing part 3 and a second housing part 4 connected thereto. An optic 5 for bundling the light emitted by the light-emitting diode 2 is arranged on the first housing part 3. The optic 5 is a light guide with a light entrance surface 6 and formed of a light-emitting surface 7 spaced therefrom. The light entry surface 6 faces a light exit window 8 of the light emitting diode 2 and the light exit surface 7 of the light disc. Between the light entry surface 6 and the light exit surface 7, the light introduced by the light entry surface 7 in optics 5 of the light emitting diode 2 is guided by utilizing the total reflection of the side boundary surfaces 9 of the optics 5 in this. The optic 5 is designed in such a way that a light distribution provided for the illumination function assigned to the light-emitting diode 2 is achieved in the emission region of the light exit surface 7.

Das zweite Gehäuseteil 4 der Halteeinrichtung 1 ist als massives Kühlelement aus einem metallischen Werkstoff ausgebildet. Zwischen dem ersten Gehäuseteil 3 und dem zweiten Gehäuseteil 4 ist die Aufnahme für die Leuchtdiode 2 gebildet. In Fig. 2 ist erkennbar, dass die Aufnahme in dem zweiten Gehäuseteil 4 eine etwa zylindrische Innenhöhlung aufweist, in die ein Abschnitt der Leuchtdiode 2 eingesetzt ist.The second housing part 4 of the holding device 1 is formed as a solid cooling element made of a metallic material. Between the first housing part 3 and the second housing part 4, the receptacle for the light-emitting diode 2 is formed. In Fig. 2 it can be seen that the receptacle in the second housing part 4 has an approximately cylindrical inner cavity into which a portion of the light emitting diode 2 is inserted.

Die Leuchtdiode 2 hat eine etwa kreisscheibenförmige Metallkernplatine 10, auf der ein in der Zeichnung nicht näher dargestellter lichtemittierender Halbleiterchip angeordnet ist, der in ein Leuchtdiodengehäuse 11 integriert ist. An dem Leuchtdiodengehäuse 11 ist das Lichtaustrittsfenster 8 angeordnet, das mit seiner Rückseite einer Lichtabstrahlstelle 12 des Halbleiterchips zugewandt ist und an seiner Vorderseite eine Lichtauskoppelfläche 13 aufweist. Aus dem Leuchtdiodengehäuse 11 sind seitlich elektrische Anschlusskontakte 14 herausgeführt, die über Bonddrähte mit Stromversorgungsanschlüssen des Halbleiterchips verbunden sind. Die Anschlusskontakte 14 sind über in der Zeichnung nicht näher dargestellte Stromversorgungsleitungen mit einer Ansteuerschaltung verbunden, die an der Batterie des Fahrzeugs angeschlossen ist.The light-emitting diode 2 has an approximately circular disk-shaped metal core board 10, on which a light-emitting semiconductor chip not shown in the drawing is arranged, which is integrated in a light-emitting diode housing 11. Arranged on the light-emitting diode housing 11 is the light exit window 8 which, with its rear side, faces a light emission point 12 of the semiconductor chip and has a light output surface 13 on its front side. From the light-emitting diode housing 11 electrical connection contacts 14 are led out laterally, which are connected via bonding wires to power supply terminals of the semiconductor chip. The terminal contacts 14 are connected via not shown in the drawing power supply lines to a drive circuit which is connected to the battery of the vehicle.

Die Leuchtdiode 2 ist derart in der Aufnahme der Halteeinrichtung 1 angeordnet, dass sie mit der dem Halbleiterchip abgewandten Rückseite der Metallkernplatine 11 am Boden der Aufnahme flächig an dem zweiten Gehäuseteil 4 anliegt. Die Vorderseite der Metallkernplatine liegt flächig an dem Halbleiterchip an. Dadurch kann die von dem Halbleiterchip erzeugte Wärme gut an die Umgebung abgeleitet werden.The light-emitting diode 2 is arranged in such a way in the receptacle of the holding device 1 that it rests with the side facing away from the semiconductor chip rear side of the metal core board 11 at the bottom of the receiving surface on the second housing part 4. The front of the metal core board is flat against the semiconductor chip. Thereby, the heat generated by the semiconductor chip can be well dissipated to the environment.

In Fig. 3 und 4 ist erkennbar, dass das erste Gehäuseteil 3 ein als Überwurfteil ausgebildetes Kupplungselement 15 aufweist. Dieses ist lösbar mit einem dazu passenden Gegenkupplungselement 16 des zweiten Gehäuseteils 4 verbindbar. Das Kupplungselement 15 und das Gegenkupplungselement 16 bilden eine Bajonett-Verbindung. Das Gegenkupplungselement 16 weist an seinem Außenumfang drei Kupplungsvorsprünge 17 auf, die in Verriegelungsstellung jeweils eine Hinterschneidung des Kupplungselements 15 hintergreifen. Mit Hilfe eines Rastelements 18 ist die Bajonett-Verbindung in Verbindungsstellung verrastet. In Fig. 2 ist erkennbar, dass das Rastelement 18 als Absatz oder Stufe ausgebildet ist, die an einem der Kupplungsvorsprünge 17 angeordnet ist.In FIGS. 3 and 4 it can be seen that the first housing part 3 has a coupling element 15 designed as a cap part. This is detachably connectable to a mating counter-coupling element 16 of the second housing part 4. The coupling element 15 and the counter-coupling element 16 form a bayonet connection. The counter-coupling element 16 has on its outer circumference three coupling projections 17 which engage in the locking position in each case an undercut of the coupling element 15. With the aid of a locking element 18, the bayonet connection is locked in the connecting position. In Fig. 2 it can be seen that the locking element 18 is formed as a step or step, which is arranged on one of the coupling projections 17.

Bei dem in der Zeichnung dargestellten Ausführungsbeispiel sind das Kupplungselement 15 und die Optik 5 als einstückig miteinander verbundenes Spritzgussteil ausgebildet. Es sind aber auch andere Ausführungen möglich, bei denen das Kupplungselement 15 und die Optik 5 als separate Teile hergestellt und danach insbesondere durch Verrasten, Kleben und/oder Schweißen miteinander verbunden werden.In the embodiment shown in the drawing, the coupling element 15 and the optics 5 are formed as an integral with each other injection molded part. However, other embodiments are possible in which the coupling element 15 and the optics 5 are produced as separate parts and then connected together in particular by latching, gluing and / or welding.

In Fig. 2 ist erkennbar, dass die Lichtauskoppelfläche 13 des Lichtaustrittsfensters 8 konvex ausgebildet ist und sich in einer Kugeloberfläche erstreckt, die konzentrisch zur Lichtabstrahlstelle 12 der Leuchtdiode 2 angeordnet ist. In Fig. 4 bis 6 ist erkennbar, dass die Lichteintrittsfläche 6 der Optik 5 konkav und zu der Lichtauskoppelfläche 13 des Lichtaustrittsfensters 8 passend ausgebildet ist. Die Lichteintrittsfläche 6 und die Lichtauskoppelfläche 13 bilden Zentrierschrägen, die quer zur optischen Achse 19 der Leuchtdiode 2 verlaufen. Die Aufnahme für die Leuchtdiode 2 ist derart ausgebildet ist, dass die Lichtauskoppelfläche 13 formschlüssig an der Lichteintrittsfläche 6 zur Anlage kommt. Dabei bilden die Gehäuseteile 3, 4 Widerlager, zwischen denen die Leuchtdiode 2 angeordnet ist. Durch diese Maßnahmen wird die Lichtabstrahlstelle 12 der Leuchtdiode 2 beim Verbinden der Gehäuseteile 3, 4 automatisch relativ zu der Lichteintrittsfläche 6 der Optik 5 zentriert. Die Halteeinrichtung 1 ermöglicht also eine Selbstzentrierung der Leuchtdiode 2.In FIG. 2 it can be seen that the light output surface 13 of the light exit window 8 is convex and extends in a spherical surface, which is arranged concentrically to the light emitting point 12 of the light emitting diode 2. In FIGS. 4 to 6 it can be seen that the light entry surface 6 of the optic 5 is designed to be concave and to match the light outcoupling surface 13 of the light exit window 8. The light entry surface 6 and the light outcoupling surface 13 form centering bevels which extend transversely to the optical axis 19 of the light emitting diode 2. The receptacle for the light emitting diode 2 is designed such that the light outcoupling surface 13 comes into positive engagement with the light entry surface 6. The housing parts 3, 4 form abutments, between which the light-emitting diode 2 is arranged. By these measures, the light emitting point 12 of the light emitting diode 2 when connecting the housing parts 3, 4 automatically centered relative to the light entry surface 6 of the optics 5. The holding device 1 thus enables self-centering of the light-emitting diode 2.

Aufgrund von in der Praxis auftretenden Fertigungstoleranzen kann zwischen der Lichtauskoppelfläche 13 und der Lichteintrittsfläche 6 bereichsweise ein Spalt gebildet sein. In diesem kann ein Optik-Gel angeordnet sein, dessen optischer Brechungsindex etwa dem Brechungsindex des Lichtaustrittsfensters 8 und der Optik 5 entspricht.Due to manufacturing tolerances occurring in practice, a gap may be formed in regions between the light output surface 13 and the light entry surface 6. In this, an optical gel may be arranged, whose optical refractive index corresponds approximately to the refractive index of the light exit window 8 and the optics 5.

In Fig. 5 und 6 ist erkennbar, dass die Optik 5 zwischen der Lichteintrittsfläche 6 und der Lichtaustrittsfläche 7 eine Innenhöhlung 20 aufweist, die als Luftlinse ausgebildet ist. Beim Durchtritt durch die zwischen dem Werkstoff der Optik 5 und der Innenhöhlung 20 gebildeten konvexen Grenzflächen werden Lichtstrahlen 21, welche die Innenhöhlung 20 schräg zur optischen Achse 19 der Leuchtdiode 2 durchsetzen, zur optischen Achse 19 hin gebrochen. In Fig. 6 ist erkennbar, dass die Innenhöhlung 20 die Optik 5 etwa rechtwinklig zu ihrer der Zeichenebene in Fig. 5 entsprechenden Erstreckungsebene durchsetzt. Die Innenhöhlung 20 ist etwa mittig zur optischen Achse 19 der Leuchtdiode 2 in einem zentralen Bereich des von der Leuchtdiode 2 abgestrahlten Lichtbündels angeordnet.In FIGS. 5 and 6 it can be seen that the optic 5 between the light entry surface 6 and the light exit surface 7 has an inner cavity 20, which is designed as an air lens. When passing through the between the material of the optic 5 and the inner cavity 20th formed convex boundary surfaces are light rays 21, which pass through the inner cavity 20 obliquely to the optical axis 19 of the light emitting diode 2, the optical axis 19 towards broken. In Fig. 6 it can be seen that the inner cavity 20 passes through the optics 5 approximately at right angles to their extension plane corresponding to the plane of the drawing in FIG. 5. The inner cavity 20 is arranged approximately centrally to the optical axis 19 of the light emitting diode 2 in a central region of the light beam emitted by the light emitting diode 2.

Erwähnt werden soll noch, dass die Optik 5 auch als Linse oder Reflektor ausgebildet sein kann.It should also be mentioned that the optic 5 can also be designed as a lens or reflector.

Claims (10)

  1. Vehicle lamp with at least one light-emitting diode (2) as light source, having a light output window (8), and with at least one lens (5) with a light entry surface (6) facing towards the light output window (8) for bundling the light radiating from the light-emitting diode (2), and with a holder apparatus (1) for positioning the light-emitting diode (2) on the lens (5), characterised in that the holder apparatus (1) has a housing with a first housing member (3) having the lens (5) and a second housing member (4) linked to said first housing member and designed as a cooling element, that formed between these housing members (3, 4) is a receptacle for the light-emitting diode (2), in which receptacle the light-emitting diode (2) is arranged in such a manner that its lies with its rear side facing away from the light output window (8) flat against the second housing member (4) and that at least one centring element is provided on the receptacle and/or the light-emitting diode (2) for centring the light entry surface (6) relative to the light output window (8).
  2. Vehicle lamp according to claim 1, characterised in that the at least one centring element has at least one centring incline which runs transversely to the optical axis (19) of the light-emitting diode (2).
  3. Vehicle lamp according to claim 1 or 2, characterised in that the light-emitting diode (2) has a support plate preferably designed as a metal core circuit board (10), on which a light-emitting semiconductor chip is arranged, and that the support plate lies with its front side facing towards the semiconductor chip flat against the semiconductor chip and with its rear side flat against the second housing member (4).
  4. Vehicle lamp according to one of the claims 1 to 3, characterised in that the light output window (8) has a convex light outcoupling surface (13), which preferably extends in a spherical surface arranged concentrically with the light radiating site (12) of the light-emitting diode (2), that the light entry surface (6) of the lens (5) is designed concave and is adapted to the light outcoupling surface (13), and that the receptacle for the light-emitting diode (2) is designed such that the light outcoupling surface (13) comes into form-fitting contact against the light entry surface (6).
  5. Vehicle lamp according to one of the claims 1 to 4, characterised in that the first housing member (3) of the holder apparatus (1) has a coupling element (15) preferably designed as a union member which is detachably connectable to the second housing member (4), and that this coupling element (15) is preferably designed in one piece with the lens (5).
  6. Vehicle lamp according to one of the claims 1 to 5, characterised in that the first housing member (3) and the second housing member (4) of the holder apparatus (1) are detachably connectable to each other, preferably by means of a bayonet connection locked in a connecting position.
  7. Vehicle lamp according to one of the claims 1 to 6, characterised in that it has a lamp housing with an inner hollow, which has a light output opening, which is covered by a lamp screen, and that at least one mounting for receiving the holder apparatus (1) is arranged in the inner hollow.
  8. Vehicle lamp according to one of the claims 1 to 7, characterised in that the second housing member (4) of the holder apparatus (1) is formed in one piece with the lamp housing (4).
  9. Vehicle lamp according to one of the claims 1 to 8, characterised in that arranged between the light output window (8) of the light-emitting diode (2) and the light entry surface (7) of the lens (5) is an optical gel whose optical refractive index approximately corresponds to that of the light output window (8) and of the lens (5).
  10. Vehicle lamp according to one of the claims 1 to 9, characterised in that the lens (5) is designed as a light guide body in which the light of the light-emitting diode (2) coupled in through the light entry surface (6) is guided, making use of total internal reflection, on the border surfaces of the light guide body.
EP04022491A 2003-09-23 2004-09-22 Vehicle lamp Expired - Fee Related EP1519107B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10343840A DE10343840A1 (en) 2003-09-23 2003-09-23 vehicle light
DE10343840 2003-09-23

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EP1519107A1 EP1519107A1 (en) 2005-03-30
EP1519107B1 true EP1519107B1 (en) 2006-09-13

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Application Number Title Priority Date Filing Date
EP04022491A Expired - Fee Related EP1519107B1 (en) 2003-09-23 2004-09-22 Vehicle lamp

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EP (1) EP1519107B1 (en)
DE (2) DE10343840A1 (en)
ES (1) ES2273139T3 (en)

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JP4616200B2 (en) * 2006-03-22 2011-01-19 本田技研工業株式会社 Vehicle lighting
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FR2906009B1 (en) * 2006-09-19 2008-12-26 Valeo Vision Sa LIGHTING AND / OR SIGNALING DEVICE FOR A MOTOR VEHICLE.
DE102008033416A1 (en) * 2008-07-16 2010-01-21 Osram Gesellschaft mit beschränkter Haftung support frame
DE102008055864A1 (en) * 2008-11-05 2010-05-06 Zumtobel Lighting Gmbh LED light
DE102009039577B4 (en) 2009-09-01 2021-09-30 Automotive Lighting Reutlingen Gmbh Light module for a lighting device of a motor vehicle
DE102010013783B4 (en) * 2010-04-03 2013-11-21 Festool Group Gmbh & Co. Kg Lighting device with LEDs
DE102011006643A1 (en) * 2011-04-01 2012-10-04 Osram Ag Optical element and lighting device
CN202403139U (en) * 2011-11-29 2012-08-29 欧司朗股份有限公司 Light-emitting diode (LED) light source assembly of headlamp device for automobile
TWI582335B (en) * 2015-02-26 2017-05-11 T Y C Brother Industrial Co Ltd Lights
CN106152009A (en) * 2015-04-15 2016-11-23 堤维西交通工业股份有限公司 Car light
DE102019106221A1 (en) * 2019-03-12 2020-09-17 HELLA GmbH & Co. KGaA Lighting device for vehicles

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Publication number Publication date
ES2273139T3 (en) 2007-05-01
EP1519107A1 (en) 2005-03-30
DE10343840A1 (en) 2005-04-28
DE502004001459D1 (en) 2006-10-26

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