WO2017191044A1 - Led lighting module for a headlight for generating a high beam and a low beam - Google Patents

Led lighting module for a headlight for generating a high beam and a low beam Download PDF

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Publication number
WO2017191044A1
WO2017191044A1 PCT/EP2017/060172 EP2017060172W WO2017191044A1 WO 2017191044 A1 WO2017191044 A1 WO 2017191044A1 EP 2017060172 W EP2017060172 W EP 2017060172W WO 2017191044 A1 WO2017191044 A1 WO 2017191044A1
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WO
WIPO (PCT)
Prior art keywords
light
emitting diodes
emitting diode
circuit board
reflector
Prior art date
Application number
PCT/EP2017/060172
Other languages
German (de)
French (fr)
Inventor
Franz-Georg Willeke
Rainer Kürpick
Original Assignee
Hella Kgaa Hueck & 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 Hueck & Co. filed Critical Hella Kgaa Hueck & Co.
Publication of WO2017191044A1 publication Critical patent/WO2017191044A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • 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]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
    • 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]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/19—Attachment of light sources or lamp holders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/39—Attachment thereof
    • 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/47—Attachment thereof
    • 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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
    • 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

Definitions

  • LED light module for a headlight for generating a high beam and a low beam
  • the invention relates to an LED light module with a plurality of light-emitting diodes, wherein the light-emitting diodes are accommodated on a common printed circuit board and wherein a reflector is provided, which extends over the circuit board and can be irradiated in the light can be generated with the light-emitting diodes, and wherein a first light-emitting diode for Forming at least a portion of a low beam is formed and wherein a second light-emitting diode for generating at least a portion of a high beam is formed.
  • the LED light module is used for arrangement in a headlight of a vehicle or the LED light module itself forms a headlight of a vehicle.
  • an LED light module with a plurality of light-emitting diodes is known, and LEDs are arranged on a common printed circuit board, which is designed to generate a low beam and to generate a high beam.
  • a common printed circuit board On the circuit board there are several light emitting diodes for generating the respective light function, and the circuit board is in turn received on a heat sink.
  • the light-emitting diodes are designed in conjunction with a primary optical system for shaping the emission characteristic, so that the primary optics are transilluminated by the light from the light-emitting diodes, in order subsequently to radiate into a secondary optical system designed as a reflector.
  • the primary optics can be formed, for example, by a potting material that encloses the light-emitting diodes in a form-fitting manner.
  • the reflector is consequently discretely illuminated in certain angular ranges with the respective light-emitting diodes; that at least two different light functions are realized with a single reflector.
  • the primary optic in its geometrical configuration has a very direct influence on the beam shaping and thus on the emission characteristic, in particular with respect to the dipped beam.
  • the primary optics must therefore be designed in accordance with high precision together with the light-emitting diodes and arranged on the circuit board. A simplification of an LED light module for providing a low beam and a high beam via a common reflector is therefore desirable.
  • the object of the invention is the development of an LED light module with a plurality of light-emitting diodes, which radiate into a common reflector and generate different light functions, wherein the LED light module is to be designed simplified.
  • the possibility should be used to easily arrange further components on the circuit board, which can take an improved influence on the Einstrahl characterizing the light of the LEDs in the reflector.
  • the invention includes the technical teaching that a diaphragm element is provided, wherein the diaphragm element is arranged between the light-emitting diodes.
  • the core idea of the invention is the simple arrangement of a diaphragm element on the printed circuit board between the light-emitting diodes, such that the diaphragm element influences at least the beam path of the light of one of the two light-emitting diodes. Consequently, a dazzling function, which already takes place on the printed circuit board, can already be realized in a simple manner on a small scale, without requiring another must be arranged as macroscopic aperture element in the beam path of the light, which is generated with at least one of the two light-emitting diodes.
  • the arrangement of the diaphragm element on the circuit board may include, for example, a soldering.
  • the diaphragm element can be designed with corresponding solder pads or the like.
  • the diaphragm element can surround at least one of the light-emitting diodes or be arranged adjacent to it, so that a part of the light of the light-emitting diode, but at least a part of a scattered light, is shaded by the diaphragm element by the diaphragm element.
  • the light-emitting diodes are preferably arranged in front of one another.
  • the reflector can be located behind the light-emitting diodes, which is arranged in the common axis of the main emission direction.
  • the first light-emitting diode for generating at least part of a low-beam light in the main emission direction is arranged in front of the second light-emitting diode for generating at least part of a high beam on the printed circuit board.
  • the diaphragm element may have a curvature, wherein a front diaphragm edge of the diaphragm element in the beam path of the first light emitting diode has to generate at least a portion of a low beam.
  • a plurality of diaphragm elements are arranged in connection with the at least two light emitting diodes on the circuit board.
  • a heat sink is provided with further advantage, on which the printed circuit board with the LEDs and / or the reflector are added.
  • the reflector directly on the heat sink, wherein the circuit board does not necessarily have to be applied directly on the heat sink, and it can be provided a receiving plate, which is located between the circuit board and the heat sink.
  • the LED light module has a preferred embodiment with a reflector which forms a reflector shard, the reflector shard projecting beyond both LEDs on the emission side.
  • the reflector shard has a curvature pointing in the main emission direction.
  • a specific embodiment of the LED light module comprises a single first light-emitting diode for generating at least a portion of a low beam and a single second light emitting diode for generating at least a portion of a high beam, wherein both LEDs are associated with a single reflector, so recorded on the common circuit board, only two light-emitting diodes are.
  • the high beam can be generated with already only one LED, wherein according to a variant, the low beam is also generated by two or more light emitting diodes.
  • a further advantage is achieved in that the first light-emitting diode and the second light-emitting diode are set operable separately from one another.
  • the electrical connection of the light-emitting diodes on the common printed circuit board takes place in such a way that the light-emitting diodes can be operated independently of one another. If more than two light-emitting diodes are arranged on the printed circuit board, in particular if the low-beam light is generated by a plurality of light-emitting diodes, then all the light-emitting diodes can be controlled individually with particular advantage in order to form discrete light regions. In particular, the LED for the high beam of the LED for the low beam can be switched on, so that when a connection both LEDs are turned on for the generation of the high beam.
  • the LED light module is in particular designed so that the light emitting diodes are formed free of a primary optics and are adapted for direct irradiation in the reflector.
  • the diaphragm element replaces the primary optics, so that the diaphragm element is set up to influence the irradiation characteristic of at least one light of the light-emitting diodes in the common reflector.
  • the influencing takes place in particular in such a way that the diaphragm element shadows a portion of the light of the light emitting diode, which serves to provide the low beam.
  • the shaded area relates in particular to a difference range between the high beam and the low beam.
  • FIG. 1 shows a schematic view of an LED light module for a headlight for generating a high beam with a first light emitting diode and a low beam with a second light emitting diode
  • Figure 2 is an enlarged view of the arrangement of the two LEDs on a common circuit board and the arrangement of a diaphragm element according to the invention and
  • Figure 3 is a view of several LED light modules on a common heat sink.
  • a LED light module 1 with a plurality of light-emitting diodes 10, 1 1 is shown in a schematic representation.
  • the two light-emitting diodes 10, 11 are accommodated on a common printed circuit board 12.
  • a reflector 13 is shown, which is also accommodated on the printed circuit board 12.
  • the printed circuit board 12 is accommodated on a heat sink 19, so that the light-emitting diodes 10, 11 can be cooled in operation via the heat sink 19.
  • the first light-emitting diode 10 is configured to generate at least a portion of a low-beam light 14 and the light-emitting diode 1 1 is adapted to generate at least a portion of a high beam 15.
  • the main emission directions of the low beam 14 and the high beam 15 are formed along a main radiation direction 17, wherein the light emitting diode 10 for providing the low beam 14 in relation is arranged on the main emission direction behind the light emitting diode 1 1 for generating the high beam.
  • the aperture element 1 6 serves to influence the Einstrahl characterizing at least the low beam 14 in the reflector thirteenth
  • FIG 2 the arrangement of the aperture element 1 6 between the two light-emitting diodes 10, 1 1 in arrangement on the circuit board 12 is shown in a more detailed view.
  • the diaphragm element 16 has a curvature which points in the direction of the light-emitting diode 10 which is set up to produce the low-beam light 14.
  • the diaphragm element 1 6 comprises a front diaphragm edge 18. With the diaphragm edge 18, the desired shading in the emission characteristic of the light emitting diode 10 can be generated with appropriate contouring, for example, to shade scattered regions when the light emitting diode 10 is turned on to form the low beam 14.
  • the aperture element 1 6 can also serve to influence the Einstrahl characterizing the light in a manner not shown in detail, which is emitted via the light emitting diode 1 1 and irradiates in the reflector 13, which light forms at least a portion of a high beam 15.
  • FIG. 3 shows an arrangement of a plurality of LED light modules 1 on a common heat sink 19. In each case, two LED light modules 1 are accommodated on a common printed circuit board 12. Unlike shown in Figure 3, but it is also possible that a common circuit board 12 is formed for receiving all four LED light modules 1, or all of the circuit boards 12 of the LED light modules 1 may be of uniform design.
  • the LEDs 10, 1 1st are the LEDs 10, 1 1st Due to the arrangement of the LEDs 10, 1 1 in front of each other, only one LED 10, 1 1 is shown graphically.
  • the multiple arrangement of the LED light modules 1 can be installed in a manner shown, for example, in a headlight of a vehicle, and the individual LED light modules 1 can be operated together or discretely. In particular, it is thus possible to generate individual regions of the low beam 14 or of the high beam 15 with respective LED light modules 1.

Abstract

The invention relates to an LED lighting module (1) comprising multiple light-emitting diodes (10, 11). The light-emitting diodes are received on a common printed circuit board (12), and a reflector (13) is provided which extends over the printed circuit board (12) and into which light generated by the light-emitting diodes (10, 11) can be emitted. A first light-emitting diode (10) is designed to generate at least one part of a low beam (14), and a second light-emitting diode (11) is designed to generate at least one part of a high beam (15). According to the invention, a dimming element (16) is provided, said dimming element (16) being arranged between the light-emitting diodes (10, 11).

Description

LED-Lichtmodul für einen Scheinwerfer zur Erzeugung eines Fernlichtes und einen Abblendlichtes  LED light module for a headlight for generating a high beam and a low beam
Beschreibung description
Die Erfindung betrifft ein LED-Lichtmodul mit mehreren Leuchtdioden, wobei die Leuchtdioden auf einer gemeinsamen Leiterplatte aufgenommen sind und wobei ein Reflektor vorgesehen ist, der sich über der Leiterplatte erstreckt und in den mit den Leuchtdioden erzeugbares Licht einstrahlbar ist, und wobei eine erste Leuchtdiode zur Erzeugung wenigstens eines Teils eines Abblendlichtes ausgebildet ist und wobei eine zweite Leuchtdiode zur Erzeugung wenigstens eines Teils eines Fernlichtes ausgebildet ist. Das LED-Lichtmodul dient dabei zur Anordnung in einem Scheinwerfer eines Fahrzeuges oder das LED-Lichtmodul selbst bildet einen Scheinwerfer eines Fahrzeuges. The invention relates to an LED light module with a plurality of light-emitting diodes, wherein the light-emitting diodes are accommodated on a common printed circuit board and wherein a reflector is provided, which extends over the circuit board and can be irradiated in the light can be generated with the light-emitting diodes, and wherein a first light-emitting diode for Forming at least a portion of a low beam is formed and wherein a second light-emitting diode for generating at least a portion of a high beam is formed. The LED light module is used for arrangement in a headlight of a vehicle or the LED light module itself forms a headlight of a vehicle.
STAND DER TECHNIK STATE OF THE ART
Aus der EP 1 934 517 B1 ist ein LED-Lichtmodul mit mehreren Leuchtdioden bekannt, und auf einer gemeinsamen Leiterplatte sind Leuchtdioden angeordnet, die zur Erzeugung eines Abblendlichtes und zur Erzeugung eines Fernlichtes ausgebildet ist. Auf der Leiterplatte befinden sich dabei mehrere Leuchtdioden zur Erzeugung der jeweiligen Lichtfunktion, und die Leiterplatte ist wiederum auf einem Kühlkörper aufgenommen.  From EP 1 934 517 B1 an LED light module with a plurality of light-emitting diodes is known, and LEDs are arranged on a common printed circuit board, which is designed to generate a low beam and to generate a high beam. On the circuit board there are several light emitting diodes for generating the respective light function, and the circuit board is in turn received on a heat sink.
Zur Erzeugung der Lichtfunktionen sind die Leuchtdioden in Verbindung mit einer primären Optik zur Formung der Abstrahlcharakteristik ausgebildet, sodass die primäre Optik durch das Licht der Leuchtdioden durchleuchtet wird, um anschließend in eine sekundäre Optik, die als Reflektor ausgeführt ist, einzustrahlen. Dabei wird angegeben, dass die primäre Optik beispielsweise durch ein Vergussmaterial gebildet werden kann, das die Leuchtdioden formschlüssig umhüllt. In Verbindung mit verschiedenen Abstrahlcharakteristiken und der Primäroptik wird der Reflektor in Folge dessen in bestimmen Winkelbereichen mit den jeweiligen Leuchtdioden diskret ausgeleuchtet, so- dass wenigstens zwei verschiedene Lichtfunktionen mit einem einzigen Reflektor realisiert werden. In order to generate the light functions, the light-emitting diodes are designed in conjunction with a primary optical system for shaping the emission characteristic, so that the primary optics are transilluminated by the light from the light-emitting diodes, in order subsequently to radiate into a secondary optical system designed as a reflector. It is indicated that the primary optics can be formed, for example, by a potting material that encloses the light-emitting diodes in a form-fitting manner. In conjunction with various radiation characteristics and the primary optics, the reflector is consequently discretely illuminated in certain angular ranges with the respective light-emitting diodes; that at least two different light functions are realized with a single reflector.
Nachteilhafterweise hat die primäre Optik in ihrer geometrischen Ausgestaltung einen sehr direkten Einfluss auf die Strahlformung und damit auf die Abstrahlcharakteristik insbesondere in Bezug auf das Abblendlicht. Die Primäroptik muss folglich gemeinsam mit den Leuchtdioden entsprechend hochgenau ausgebildet und auf der Leiterplatte angeordnet werden. Eine Vereinfachung eines LED-Lichtmoduls zur Bereitstellung eines Abblendlichtes und eines Fernlichtes über einen gemeinsamen Reflektor wird daher angestrebt. Disadvantageously, the primary optic in its geometrical configuration has a very direct influence on the beam shaping and thus on the emission characteristic, in particular with respect to the dipped beam. The primary optics must therefore be designed in accordance with high precision together with the light-emitting diodes and arranged on the circuit board. A simplification of an LED light module for providing a low beam and a high beam via a common reflector is therefore desirable.
OFFENBARUNG DER ERFINDUNG DISCLOSURE OF THE INVENTION
Aufgabe der Erfindung ist die Weiterbildung eines LED-Lichtmoduls mit mehreren Leuchtdioden, die in einen gemeinsamen Reflektor einstrahlen und unterschiedliche Lichtfunktionen erzeugen, wobei das LED-Lichtmodul vereinfacht ausgeführt werden soll. Insbesondere soll die Möglichkeit genutzt werden, auf einfache Weise weitere Komponenten auf der Leiterplatte anzuordnen, die einen verbesserten Einfluss nehmen können auf die Einstrahlcharakteristik des Lichtes der Leuchtdioden in den Reflektor.  The object of the invention is the development of an LED light module with a plurality of light-emitting diodes, which radiate into a common reflector and generate different light functions, wherein the LED light module is to be designed simplified. In particular, the possibility should be used to easily arrange further components on the circuit board, which can take an improved influence on the Einstrahlcharakteristik the light of the LEDs in the reflector.
Diese Aufgabe wird ausgehend von einem LED-Lichtmodul gemäß dem Oberbegriff des Anspruches 1 in Verbindung mit den kennzeichnenden Merkmalen gelöst. Vorteilhafte Weiterbildungen der Erfindung sind in den abhängigen Ansprüchen angegeben. This object is achieved on the basis of an LED light module according to the preamble of claim 1 in conjunction with the characterizing features. Advantageous developments of the invention are specified in the dependent claims.
Die Erfindung schließt die technische Lehre ein, dass ein Blendenelement vorgesehen ist, wobei das Blendenelement zwischen den Leuchtdioden angeordnet ist. The invention includes the technical teaching that a diaphragm element is provided, wherein the diaphragm element is arranged between the light-emitting diodes.
Kerngedanke der Erfindung ist die einfache Anordnung eines Blendenelementes auf der Leiterplatte zwischen den Leuchtdioden, derart, dass das Blendenelement wenigstens den Strahlengang des Lichtes einer der beiden Leuchtdioden beeinflusst. Folglich kann bereits auf einfache Weise in einem kleinen Maßstab eine Blendenfunktion realisiert werden, die bereits auf der Leiterplatte stattfindet, ohne dass ein weiteres ver- gleichsweise makroskopisches Blendenelement im Strahlengang des Lichtes angeordnet werden muss, das mit wenigstens einer der beiden Leuchtdioden erzeugt wird. The core idea of the invention is the simple arrangement of a diaphragm element on the printed circuit board between the light-emitting diodes, such that the diaphragm element influences at least the beam path of the light of one of the two light-emitting diodes. Consequently, a dazzling function, which already takes place on the printed circuit board, can already be realized in a simple manner on a small scale, without requiring another must be arranged as macroscopic aperture element in the beam path of the light, which is generated with at least one of the two light-emitting diodes.
Die Anordnung des Blendenelementes auf der Leiterplatte kann beispielsweise ein Auflöten umfassen. Konkret kann das Blendenelement mit entsprechenden Lötpads oder dergleichen ausgeführt werden. Das Blendenelement kann dabei wenigstens eine der Leuchtdioden umschließen oder benachbart zu dieser angeordnet sein, sodass durch das Blendenelement ein Teil des Lichtes der Leuchtdiode, jedoch wenigstens ein Teil eines Streulichtes, durch das Blendenelement abgeschattet wird. The arrangement of the diaphragm element on the circuit board may include, for example, a soldering. Concretely, the diaphragm element can be designed with corresponding solder pads or the like. In this case, the diaphragm element can surround at least one of the light-emitting diodes or be arranged adjacent to it, so that a part of the light of the light-emitting diode, but at least a part of a scattered light, is shaded by the diaphragm element by the diaphragm element.
Mit Bezug auf eine Haupt-Abstrahlrichtung sind die Leuchtdioden vorzugsweise voreinander angeordnet. Dabei kann sich der Reflektor hinter den Leuchtdioden befinden, der in der gemeinsamen Achse der Haupt-Abstrahlrichtung angeordnet ist. With reference to a main emission direction, the light-emitting diodes are preferably arranged in front of one another. In this case, the reflector can be located behind the light-emitting diodes, which is arranged in the common axis of the main emission direction.
Insbesondere besteht vorteilhaft die Möglichkeit, dass die erste Leuchtdiode zur Erzeugung wenigstens eines Teils eines Abblendlichtes in Haupt- Abstrahlrichtung vor der zweiten Leuchtdiode zur Erzeugung wenigstens eines Teil eines Fernlichtes auf der Leiterplatte angeordnet ist. Dabei kann das Blendenelement eine Krümmung aufweisen, wobei eine vordere Blendenkante des Blendenelementes in den Strahlengang der ersten Leuchtdiode weist zur Erzeugung wenigstens eines Teils eines Abblendlichtes. Gemäß der Erfindung besteht auch die Möglichkeit, dass mehrere Blendenelemente in Verbindung mit den wenigstens zwei Leuchtdioden auf der Leiterplatte angeordnet sind. In particular, there is advantageously the possibility that the first light-emitting diode for generating at least part of a low-beam light in the main emission direction is arranged in front of the second light-emitting diode for generating at least part of a high beam on the printed circuit board. In this case, the diaphragm element may have a curvature, wherein a front diaphragm edge of the diaphragm element in the beam path of the first light emitting diode has to generate at least a portion of a low beam. According to the invention, it is also possible that a plurality of diaphragm elements are arranged in connection with the at least two light emitting diodes on the circuit board.
Zur Entwarmung der Leuchtdioden ist mit weiterem Vorteil ein Kühlkörper vorgesehen, auf dem die Leiterplatte mit den Leuchtdioden und/oder der Reflektor aufgenommen sind. Alternativ besteht die Möglichkeit, den Reflektor unmittelbar auf dem Kühlkörper anzubringen, wobei die Leiterplatte nicht zwingend unmittelbar auf dem Kühlkörper aufgebracht sein muss, und es kann eine Aufnahmeplatte vorgesehen sein, die sich zwischen der Leiterplatte und dem Kühlkörper befindet. Das LED-Lichtmodul weist eine bevorzugte Ausführungsform mit einem Reflektor auf, der eine Reflektorscherbe bildet, wobei die Reflektorscherbe beide Leuchtdioden ab- strahlseitig überragt. Die Reflektorscherbe weist dabei eine Krümmung auf, die in Haupt-Abstrahlrichtung weist. For dehumidification of the LEDs, a heat sink is provided with further advantage, on which the printed circuit board with the LEDs and / or the reflector are added. Alternatively, it is possible to attach the reflector directly on the heat sink, wherein the circuit board does not necessarily have to be applied directly on the heat sink, and it can be provided a receiving plate, which is located between the circuit board and the heat sink. The LED light module has a preferred embodiment with a reflector which forms a reflector shard, the reflector shard projecting beyond both LEDs on the emission side. The reflector shard has a curvature pointing in the main emission direction.
Eine spezielle Ausführungsform des LED-Lichtmoduls umfasst eine einzige erste Leuchtdiode zur Erzeugung wenigstens eines Teils eines Abblendlichtes und eine einzige zweite Leuchtdiode zur Erzeugung wenigstens eines Teils eines Fernlichtes, wobei beide Leuchtdioden einem einzigen Reflektor zugeordnet sind, sodass auf der gemeinsamen Leiterplatte lediglich zwei Leuchtdioden aufgenommen sind. Insbesondere das Fernlicht kann dabei mit bereits nur einer Leuchtdiode erzeugt werden, wobei gemäß einer Variante das Abblendlicht auch durch zwei oder mehrere Leuchtdioden erzeugt wird. A specific embodiment of the LED light module comprises a single first light-emitting diode for generating at least a portion of a low beam and a single second light emitting diode for generating at least a portion of a high beam, wherein both LEDs are associated with a single reflector, so recorded on the common circuit board, only two light-emitting diodes are. In particular, the high beam can be generated with already only one LED, wherein according to a variant, the low beam is also generated by two or more light emitting diodes.
Ein weiterer Vorteil wird dadurch erreicht, dass die erste Leuchtdiode und die zweite Leuchtdiode getrennt voneinander betreibbar eingerichtet sind. Die elektrische BeSchaltung der Leuchtdioden auf der gemeinsamen Leiterplatte erfolgt dabei derart, dass die Leuchtdioden unabhängig voneinander betrieben werden können. Sind mehr als zwei Leuchtdioden auf der Leiterplatte angeordnet, insbesondere wenn das Abblendlicht durch mehrere Leuchtdioden erzeugt wird, so können sämtliche Leuchtdioden mit besonderem Vorteil einzeln angesteuert werden, um diskrete Lichtbereiche zu bilden. Insbesondere kann die Leuchtdiode für das Fernlicht der Leuchtdiode für das Abblendlicht zugeschaltet werden, sodass bei einer Zuschaltung beide Leuchtdioden für die Erzeugung des Fernlichtes eingeschaltet sind. A further advantage is achieved in that the first light-emitting diode and the second light-emitting diode are set operable separately from one another. The electrical connection of the light-emitting diodes on the common printed circuit board takes place in such a way that the light-emitting diodes can be operated independently of one another. If more than two light-emitting diodes are arranged on the printed circuit board, in particular if the low-beam light is generated by a plurality of light-emitting diodes, then all the light-emitting diodes can be controlled individually with particular advantage in order to form discrete light regions. In particular, the LED for the high beam of the LED for the low beam can be switched on, so that when a connection both LEDs are turned on for the generation of the high beam.
Das LED-Lichtmodul ist insbesondere so ausgeführt, dass die Leuchtdioden frei von einer primären Optik ausgebildet sind und zur direkten Einstrahlung in den Reflektor eingerichtet sind. Dabei ersetzt das Blendenelement die primäre Optik, sodass das Blendenelement dazu eingerichtet ist, die Einstrahlcharakteristik wenigstens eines Lichtes der Leuchtdioden in den gemeinsamen Reflektor zu beeinflussen. Die Beeinflussung erfolgt dabei insbesondere derart, dass das Blendenelement einen Teil des Lichtes der Leuchtdiode abschattet, die zur Bereitstellung des Abblendlichtes dient. Der abgeschattete Bereich betrifft dabei insbesondere einen Differenzbereich zwischen dem Fernlicht und dem Abblendlicht. The LED light module is in particular designed so that the light emitting diodes are formed free of a primary optics and are adapted for direct irradiation in the reflector. In this case, the diaphragm element replaces the primary optics, so that the diaphragm element is set up to influence the irradiation characteristic of at least one light of the light-emitting diodes in the common reflector. The influencing takes place in particular in such a way that the diaphragm element shadows a portion of the light of the light emitting diode, which serves to provide the low beam. The shaded area relates in particular to a difference range between the high beam and the low beam.
BEVORZUGTES AUSFÜHRUNGSBEISPIEL DER ERFINDUNG PREFERRED EMBODIMENT OF THE INVENTION
Weitere, die Erfindung verbessernde Maßnahmen werden nachstehend gemeinsam mit der Beschreibung eines bevorzugten Ausführungsbeispiels der Erfindung anhand der Figuren näher dargestellt. Es zeigt: Further, measures improving the invention will be described in more detail below together with the description of a preferred embodiment of the invention with reference to FIGS. It shows:
Figur 1 eine schematisierte Ansicht eines LED-Lichtmoduls für einen Scheinwerfer zur Erzeugung eines Fernlichtes mit einer ersten Leuchtdiode und eines Abblendlichtes mit einer zweiten Leuchtdiode, 1 shows a schematic view of an LED light module for a headlight for generating a high beam with a first light emitting diode and a low beam with a second light emitting diode,
Figur 2 eine vergrößerte Ansicht der Anordnung der beiden Leuchtdioden auf einer gemeinsamen Leiterplatte sowie die Anordnung eines Blendenelementes gemäß der Erfindung und Figure 2 is an enlarged view of the arrangement of the two LEDs on a common circuit board and the arrangement of a diaphragm element according to the invention and
Figur 3 eine Ansicht mehrerer LED-Lichtmodule auf einem gemeinsamen Kühlkörper. Figure 3 is a view of several LED light modules on a common heat sink.
In Figur 1 ist in schematisierter Darstellung ein LED-Lichtmodul 1 mit mehreren Leuchtdioden 10, 1 1 gezeigt. Die beiden Leuchtdioden 10, 1 1 sind auf einer gemeinsamen Leiterplatte 12 aufgenommen. Weiterhin ist ein Reflektor 13 gezeigt, der ebenfalls auf der Leiterplatte 12 aufgenommen ist. Die Leiterplatte 12 ist auf einem Kühlkörper 19 aufgenommen, sodass die Leuchtdioden 10, 1 1 im Betrieb über den Kühlkörper 19 entwärmt werden können. In Figure 1, a LED light module 1 with a plurality of light-emitting diodes 10, 1 1 is shown in a schematic representation. The two light-emitting diodes 10, 11 are accommodated on a common printed circuit board 12. Furthermore, a reflector 13 is shown, which is also accommodated on the printed circuit board 12. The printed circuit board 12 is accommodated on a heat sink 19, so that the light-emitting diodes 10, 11 can be cooled in operation via the heat sink 19.
Die erste Leuchtdiode 10 ist dazu eingerichtet, wenigstens einen Teil eines Abblendlichtes 14 zu erzeugen und die Leuchtdiode 1 1 ist dazu eingerichtet, wenigstens einen Teil eines Fernlichtes 15 zu erzeugen. Die Haupt-Abstrahlrichtungen des Abblendlichtes 14 und des Fernlichtes 15 ist dabei entlang einer Haupt-Abstrahlrichtung 17 ausgebildet, wobei die Leuchtdiode 10 zur Bereitstellung des Abblendlichtes 14 in Bezug auf die Haupt-Abstrahlrichtung hinter der Leuchtdiode 1 1 zur Erzeugung des Fernlichtes angeordnet ist. The first light-emitting diode 10 is configured to generate at least a portion of a low-beam light 14 and the light-emitting diode 1 1 is adapted to generate at least a portion of a high beam 15. The main emission directions of the low beam 14 and the high beam 15 are formed along a main radiation direction 17, wherein the light emitting diode 10 for providing the low beam 14 in relation is arranged on the main emission direction behind the light emitting diode 1 1 for generating the high beam.
Zwischen den beiden Leuchtdioden 10, 1 1 befindet sich ein Blendenelement 1 6. Das Blendenelement 1 6 dient zur Beeinflussung der Einstrahlcharakteristik wenigstens des Abblendlichtes 14 in den Reflektor 13. Between the two light-emitting diodes 10, 1 1 there is an aperture element 1 6. The aperture element 1 6 serves to influence the Einstrahlcharakteristik at least the low beam 14 in the reflector thirteenth
In Figur 2 ist in detaillierterer Ansicht die Anordnung des Blendenelementes 1 6 zwischen den beiden Leuchtdioden 10, 1 1 in Anordnung auf der Leiterplatte 12 gezeigt. Das Blendenelement 1 6 weist eine Krümmung auf, die in Richtung zur Leuchtdiode 10 weist, die zur Erzeugung des Abblendlichtes 14 eingerichtet ist. Das Blendenelement 1 6 umfasst eine vordere Blendenkante 18. Mit der Blendenkante 18 kann bei entsprechender Konturierung die gewünschte Abschattung in der Abstrahlcharakteristik der Leuchtdiode 10 erzeugt werden, beispielsweise um Streubereiche abzuschatten, wenn die Leuchtdiode 10 zur Bildung des Abblendlichtes 14 eingeschaltet wird. Das Blendenelement 1 6 kann in nicht näher gezeigter Weise jedoch auch zur Beeinflussung der Einstrahlcharakteristik des Lichtes dienen, das über die Leuchtdiode 1 1 emittiert wird und in den Reflektor 13 einstrahlt, welches Licht wenigstens einen Teil eines Fernlichtes 15 bildet. In Figure 2, the arrangement of the aperture element 1 6 between the two light-emitting diodes 10, 1 1 in arrangement on the circuit board 12 is shown in a more detailed view. The diaphragm element 16 has a curvature which points in the direction of the light-emitting diode 10 which is set up to produce the low-beam light 14. The diaphragm element 1 6 comprises a front diaphragm edge 18. With the diaphragm edge 18, the desired shading in the emission characteristic of the light emitting diode 10 can be generated with appropriate contouring, for example, to shade scattered regions when the light emitting diode 10 is turned on to form the low beam 14. However, the aperture element 1 6 can also serve to influence the Einstrahlcharakteristik the light in a manner not shown in detail, which is emitted via the light emitting diode 1 1 and irradiates in the reflector 13, which light forms at least a portion of a high beam 15.
Figur 3 zeigt eine Anordnung von mehreren LED-Lichtmodulen 1 auf einem gemeinsamen Kühlkörper 19. Dabei sind jeweils zwei LED-Lichtmodule 1 auf einer gemeinsamen Leiterplatte 12 aufgenommen. Anders als in Figur 3 dargestellt, ist es aber auch möglich, dass eine gemeinsame Leiterplatte 12 zur Aufnahme aller vier LED- Lichtmodule 1 ausgebildet ist, beziehungsweise sämtliche der Leiterplatten 12 der LED-Lichtmodule 1 können baueinheitlich ausgebildet sein. FIG. 3 shows an arrangement of a plurality of LED light modules 1 on a common heat sink 19. In each case, two LED light modules 1 are accommodated on a common printed circuit board 12. Unlike shown in Figure 3, but it is also possible that a common circuit board 12 is formed for receiving all four LED light modules 1, or all of the circuit boards 12 of the LED light modules 1 may be of uniform design.
Vor den Reflektoren 13 befinden sich die Leuchtdioden 10, 1 1 . Aufgrund der Anordnung der Leuchtdioden 10, 1 1 voreinander ist lediglich eine Leuchtdiode 10, 1 1 grafisch dargestellt. Die Mehrfachanordnung der LED-Lichtmodule 1 kann in gezeigter Weise beispielsweise in einen Scheinwerfer eines Fahrzeuges eingebaut werden, und die einzelnen LED-Lichtmodule 1 können gemeinsam oder diskret betrieben werden. Insbesondere besteht damit die Möglichkeit, einzelne Bereiche des Abblendlichtes 14 oder des Fernlichtes 15 mit jeweiligen LED-Lichtmodulen 1 zu erzeugen. In front of the reflectors 13 are the LEDs 10, 1 1st Due to the arrangement of the LEDs 10, 1 1 in front of each other, only one LED 10, 1 1 is shown graphically. The multiple arrangement of the LED light modules 1 can be installed in a manner shown, for example, in a headlight of a vehicle, and the individual LED light modules 1 can be operated together or discretely. In particular, it is thus possible to generate individual regions of the low beam 14 or of the high beam 15 with respective LED light modules 1.
Die Erfindung beschränkt sich in ihrer Ausführung nicht auf das vorstehend angegebene bevorzugte Ausführungsbeispiel. Vielmehr ist eine Anzahl von Varianten denkbar, welche von der dargestellten Lösung auch bei grundsätzlich anders gearteten Ausführungen Gebrauch macht. Sämtliche aus den Ansprüchen, der Beschreibung oder den Zeichnungen hervorgehenden Merkmale und/oder Vorteile, einschließlich konstruktiven Einzelheiten, räumliche Anordnungen und Verfahrensschritte, können sowohl für sich als auch in den verschiedensten Kombinationen erfindungswesentlich sein. Insbesondere können die einzelnen in Figur 3 dargestellten LED-Lichtmodule 1 mit Merkmalen ausgeführt werden, wie diese in Zusammenhang mit den Figuren 1 und 2 beschrieben sind. The invention is not limited in its execution to the above-mentioned preferred embodiment. Rather, a number of variants is conceivable, which makes use of the illustrated solution even with fundamentally different types of use. All features and / or advantages resulting from the claims, the description or the drawings, including design details, spatial arrangements and method steps, can be essential to the invention, both individually and in the most diverse combinations. In particular, the individual LED light modules 1 shown in FIG. 3 can be designed with features as described in connection with FIGS. 1 and 2.
Bezugszeichenliste LIST OF REFERENCE NUMBERS
1 LED-Lichtmodul1 LED light module
10 Leuchtdiode 10 light emitting diode
1 1 Leuchtdiode  1 1 LED
12 Leiterplatte  12 circuit board
13 Reflektor  13 reflector
14 Abblendlicht  14 low beam
15 Fernlicht  15 high beam
1 6 Blendenelement 1 6 Shutter element
17 Haupt-Abstrahlrichtung17 main emission direction
18 Blendenkante 18 aperture edge
19 Kühlkörper  19 heat sink

Claims

Patentansprüche claims
1 . LED-Lichtmodul (1 ) mit mehreren Leuchtdioden (10, 1 1 ), wobei 1 . LED light module (1) with a plurality of light-emitting diodes (10, 1 1), wherein
die Leuchtdioden auf einer gemeinsamen Leiterplatte (12) aufgenommen sind,  the light-emitting diodes are accommodated on a common printed circuit board (12),
ein Reflektor (13) vorgesehen ist, der sich über der Leiterplatte (12) erstreckt und in den mit den Leuchtdioden (10, 1 1 ) erzeugbares Licht einstrahlbar ist,  a reflector (13) is provided, which extends over the printed circuit board (12) and into which light which can be generated with the light-emitting diodes (10, 11) can be irradiated,
eine erste Leuchtdiode (10) zur Erzeugung wenigstens eines Teils eines Abblendlichtes (14) ausgebildet ist und  a first light emitting diode (10) for generating at least a portion of a low beam (14) is formed and
eine zweite Leuchtdiode (1 1 ) zur Erzeugung wenigstens eines Teils eines Fernlichtes (15) ausgebildet ist,  a second light-emitting diode (1 1) is designed to generate at least part of a high beam (15),
dadurch gekennzeichnet, dass ein Blendenelement (1 6) vorgesehen ist, wobei das Blendenelement (1 6) zwischen den Leuchtdioden (10, 1 1 ) angeordnet ist.  characterized in that a diaphragm element (1 6) is provided, wherein the diaphragm element (1 6) between the light-emitting diodes (10, 1 1) is arranged.
2. LED-Lichtmodul (1 ) nach Anspruch 1 , dadurch gekennzeichnet, dass das 2. LED light module (1) according to claim 1, characterized in that the
Blendenelement (1 6) auf der Leiterplatte (12) angeordnet ist.  Aperture element (1 6) on the circuit board (12) is arranged.
3. LED-Lichtmodul (1 ) nach Anspruch 1 oder 2, dadurch gekennzeichnet, 3. LED light module (1) according to claim 1 or 2, characterized in that
dass die Leuchtdioden (10, 1 1 ) in Bezug auf eine Haupt-Abstrahlrichtung (17) voreinander angeordnet sind.  in that the light-emitting diodes (10, 11) are arranged in front of one another in relation to a main emission direction (17).
4. LED-Lichtmodul (1 ) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die erste Leuchtdiode (10) zur Erzeugung wenigstens eines Teils eines Abblendlichtes (14) in Haupt-Abstrahlrichtung (17) vor der zweiten Leuchtdiode (1 1 ) zur Erzeugung wenigstens eines Teils eines Fernlichtes (15) auf der Leiterplatte (12) angeordnet ist. 4. LED light module (1) according to one of claims 1 to 3, characterized in that the first light-emitting diode (10) for generating at least a portion of a low beam (14) in the main emission direction (17) in front of the second light-emitting diode (1 1 ) is arranged for generating at least a portion of a high beam (15) on the circuit board (12).
5. LED-Lichtmodul (1 ) nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, dass das Blendenelement (16) eine Krümmung aufweist und eine vordere Blendenkante (18) umfasst, die in den Strahlengang der ersten Leuchtdiode (10) zur Erzeugung wenigstens eines Teils eines Abblendlichtes5. LED light module (1) according to one of the preceding claims, characterized in that the diaphragm element (16) has a curvature and a front diaphragm edge (18), in the beam path of the first light-emitting diode (10) for generating at least one part a dipped beam
(14) weist. (14) points.
6. LED-Lichtmodul (1 ) nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, dass ein Kühlkörper (19) vorgesehen ist, auf dem die Leiterplatte (12) mit den Leuchtdioden (10, 1 1 ) und/oder der Reflektor (13) aufgenommen sind. 6. LED light module (1) according to one of claims 3 to 5, characterized in that a cooling body (19) is provided, on which the printed circuit board (12) with the light-emitting diodes (10, 1 1) and / or the reflector ( 13) are included.
7. LED-Lichtmodul (1 ) nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, dass der Reflektor (13) als Reflektorscherbe ausgebildet ist und beide Leuchtdioden (10, 1 1 ) abstrahlseitig überragt. 7. LED light module (1) according to any one of the preceding claims, characterized in that the reflector (13) is designed as a reflector shard and both light-emitting diodes (10, 1 1) projects beyond the radiation side.
8. LED-Lichtmodul (1 ) nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, dass eine einzige erste Leuchtdiode (10) zur Erzeugung wenigstens eines Teils eines Abblendlichtes (14) und eine einzige zweite Leuchtdiode (1 1 ) zur Erzeugung wenigstens eines Teils eines Fernlichtes8. LED light module (1) according to one of the preceding claims, characterized in that a single first light emitting diode (10) for generating at least a portion of a low beam (14) and a single second light emitting diode (1 1) for generating at least a portion of a high beam
(15) einem Reflektor (13) zugeordnet sind, sodass auf der gemeinsamen Leiterplatte (12) zwei Leuchtdioden (10, 1 1 ) aufgenommen sind. (15) are associated with a reflector (13), so that on the common printed circuit board (12) has two light-emitting diodes (10, 1 1) are added.
9. LED-Lichtmodul (1 ) nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, dass die erste Leuchtdiode (10) und die zweite Leuchtdiode (1 1 ) getrennt voneinander betreibbar eingerichtet sind. 9. LED light module (1) according to one of the preceding claims, characterized in that the first light-emitting diode (10) and the second light-emitting diode (1 1) are arranged separately operable.
10. LED-Lichtmodul (1 ) nach einem der vorgenannten Ansprüche, dadurch gekennzeichnet, dass die Leuchtdioden (10, 1 1 ) frei von einer primären Optik ausgebildet sind und zur direkten Einstrahlung in den Reflektor (13) eingerichtet sind. 10. LED light module (1) according to any one of the preceding claims, characterized in that the light-emitting diodes (10, 1 1) are formed free of a primary optics and for direct irradiation in the reflector (13) are arranged.
PCT/EP2017/060172 2016-05-03 2017-04-28 Led lighting module for a headlight for generating a high beam and a low beam WO2017191044A1 (en)

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