EP2386792A1 - LED light module - Google Patents

LED light module Download PDF

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Publication number
EP2386792A1
EP2386792A1 EP10450085A EP10450085A EP2386792A1 EP 2386792 A1 EP2386792 A1 EP 2386792A1 EP 10450085 A EP10450085 A EP 10450085A EP 10450085 A EP10450085 A EP 10450085A EP 2386792 A1 EP2386792 A1 EP 2386792A1
Authority
EP
European Patent Office
Prior art keywords
light source
lens
led light
opening
led
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP10450085A
Other languages
German (de)
French (fr)
Other versions
EP2386792B1 (en
Inventor
Andreas Luger
Andreas Moser
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.)
ZKW Group GmbH
Original Assignee
Zizala Lichtsysteme GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zizala Lichtsysteme GmbH filed Critical Zizala Lichtsysteme GmbH
Priority to EP10450085.5A priority Critical patent/EP2386792B1/en
Priority to US13/106,325 priority patent/US8936381B2/en
Priority to CN201110134409.9A priority patent/CN102287734B/en
Publication of EP2386792A1 publication Critical patent/EP2386792A1/en
Application granted granted Critical
Publication of EP2386792B1 publication Critical patent/EP2386792B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—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
    • F21S41/153—Light emitting diodes [LED] arranged in one or more lines arranged in a matrix
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/285—Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805
    • 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

Definitions

  • the invention relates to an LED light module for a motor vehicle or for a headlight for a motor vehicle, wherein the light module comprises a lens and an LED light source.
  • Such an LED light source may be constructed of one or more light emitting diodes (LEDs) arranged to form a "common" light beam.
  • LEDs light emitting diodes
  • An initially mentioned light module consists essentially of one (or more) LED light source (s), e.g. in the form of a high-power light-emitting diode, and a lens, can be used to generate a light distribution which contains light components above the HD line in the generated light image.
  • the thus realized light function (example: high beam, object lighting, ...) can be activated only in special driving situations, just then, if an object for illumination in front of the vehicle is present or the situation allows the switching on of the high beam.
  • Such a light module is only rarely active, depending on the type (high beam, object lighting, ...) of the light module often only a few minutes per hour.
  • Such a light module can therefore not be included in the design of the night design of the vehicle or the vehicle headlamp, i. E. the visible to the outside of the light module area appears at night, when the light module is not activated, dark, which is often perceived as unpleasant.
  • a light module mentioned in the introduction that according to the invention in the light exit direction between the LED light source and the lens a lens is arranged, wherein the lens at least one opening for the direct passage of at least a portion of the emitted light from the LED light source and wherein the direct component emerging through the opening of the lens the light emitted by the LED light source is projected via the lens to produce a light function in the area in front of the motor vehicle.
  • the lens can be homogeneously illuminated, whereby the light from the primary light source can pass unhindered through the opening in the lens, so that the main light function is not affected.
  • the LED light source is embodied as a primary light source whose substantially entire emitted, relevant luminous flux exits through the opening of the lens to produce the light function.
  • Relevant luminous flux is to be understood as the luminous flux which can enter via the light entry surface of the lens; This luminous flux thus includes those light rays which are emitted within the aperture angle of the lens from the LED light source.
  • a light-emitting diode has a specific emission behavior, so that usually a portion of the light rays - unless it is deflected - is emitted in directions at angles which are greater than the opening angle of the lens, so that this light does not enter the lens and thus is basically usable for the light function.
  • Light from the LED light source, which is radiated at a larger angle than the opening angle no longer represents "relevant" luminous flux.
  • At least one further LED light source is provided as a secondary light source, which is arranged with respect to the opening of the lens so that the light emitted by the secondary light source is emitted substantially to the lens so that substantially no Luminous flux of the secondary light source exits through the opening of the lens.
  • Such an LED light source can be constructed from one or more light-emitting diodes (LEDs), which form a "common" light beam.
  • the secondary light source can then - see below - be constructed from one or more such LED light sources.
  • a diffusing screen (diffuse disk) which is illuminated by one or more additional LED light sources.
  • an axis by the LED light source of the primary light source and the opening of the lens forms the optical axis and that the at least one LED light source of the secondary light source is outside the optical axis.
  • the at least one LED light source of the secondary light source against the light exit direction, with respect to the primary Light source is arranged offset to the rear.
  • the secondary light source comprises two or more LED light sources.
  • the LED light source of the primary light source and the at least one LED light source of the secondary light source can be controlled separately, so that the primary light source and the secondary light source can be switched on and off independently.
  • the secondary light source of the light module in the vertical direction below a horizontal plane which runs for example by the LED light source of the primary light source, n LED light sources and above the Horizontal plane has m LED light sources, where m ⁇ n.
  • the lens of the light module is mostly viewed from angles above this horizontal, it is advantageous if the number of LEDs in the lower area is increased, since this area is imaged in the angular range above the horizontal and so a more visually appealing illumination of the lens can be achieved.
  • the optical axis of the lens does not necessarily have to pass through the LED or, in the case of several LEDs, through its geometric center, the horizontal plane does not necessarily have to pass through the primary LED light source, but can also be defined by the lens Direction may be shifted, which also changes the position of the image (angle).
  • the LED light source (s) above / below the horizontal plane are each arranged symmetrically in the horizontal direction with respect to a vertical plane through the optical axis / are.
  • LED light sources of the secondary light source are arranged laterally next to the LED light source of the primary light source.
  • the dimensions of the opening in the lens such as diameter, side dimensions, etc. and / or the arrangement of the LED light source Primary light source with respect to the opening of the lens and / or the distance of the LED light source of the primary light source to the lens are selected such that of the LED light source, which forms the primary light source, all emitted light rays, which within an opening angle of the lens can pass through the opening.
  • the size of the opening in the lens is dependent on the distance of the disc to the LED light source of the primary light source and can be derived from the opening angle of the lens. Since the aperture of the lens is imaged directly over the lens, it is advantageous to make this aperture as small as possible. In addition, the shape of the opening is preferably adapted to the shape of the lens trimming.
  • the lens is positioned as close as possible to the LED light source of the primary light source.
  • shape of the lens trimming is mentioned here, then it is of particular importance which shape the light entry surface of the lens has.
  • This has a flat or curved surface with an example circular, (four-, right-) square, or depending on the application arbitrary shape, which shape is referred to here as "shape of the lens trimming".
  • shape of the opening is preferably identical in terms of proportions to the lens trimming.
  • the shape of the lens is preferably designed so that it is visible through the projection lens, viewed from the outside, from all viewing angles, so that a homogeneous appearance of the lens can be generated.
  • the dimensions of the opening in the lens such as diameter, side dimensions, etc. and / or the arrangement of the at least one LED light source of the secondary light source with respect to the opening of the lens and / or the distance the at least one LED light source of the secondary light source is selected to the lens so that emitted from the at least one LED light source, which forms the secondary light source, light rays only in areas of the lens, which have no opening.
  • the dimensions of the opening in the lens such as diameter, side dimensions, etc. and / or the arrangement of the at least one LED light source of the secondary light source with respect to the opening of the lens and / or the distance the at least one LED light source of the secondary light source to the lens are selected such that from the at least one LED light source, which forms the secondary light source, light rays are emitted to the edge of the opening of the lens.
  • the uniform illumination of the lens is essentially defined by 3 parameters: distance of the secondary LED light source (s) to the lens, number of light sources and arrangement of the light source about the optical axis of the lens, preferably in one or more planes behind the lens, to achieve the necessary distance of the secondary LED light sources to the lens.
  • the homogeneity of the lens is directly proportional to the number of secondary LED light sources and the distance of the secondary LED light sources to the lens, wherein a uniform distribution of the secondary LED light sources is advantageous.
  • the limiting factor for these parameters is the space available for the light module. This results in certain optimized variants.
  • edge of the opening of the lens to the rear, directed in the direction of the primary light source is tapered, e.g. trapezoidal in order to be optimally adapted to the beam path of the boundary rays of the primary light source (boundary rays are those light rays which impinge on the latter at the opening angle of the lens).
  • the LED light source of the primary light source may be an infrared light source.
  • the Figures 1 and 2 show a first light module 1 according to the invention for a motor vehicle or for a headlight for a motor vehicle.
  • the LED light module 1 comprises a lens 2 and an LED light source 8, 9, this LED light source consisting of a print 8 and a light-emitting diode 9.
  • This LED light source can be a high-performance light-emitting diode, or it can also be an infrared light-emitting diode.
  • a lens 3 is arranged, wherein the lens 3 has an opening 10 for the direct passage of at least a portion of the light emitted from the LED light source 8, 9. This exiting through the opening 10 of the lens 3 direct share emitted by the LED light source 8, 9 Light is projected via the lens 2 to generate a light function in the area in front of the motor vehicle.
  • the LED light source 8, 9 is designed as a primary light source, the substantially entire emitted, relevant luminous flux through the opening 10 of the lens 3) exits to produce the light function.
  • the light function is e.g. for high beam or for object lighting (e.g. pedestrian), which light function is accordingly activated only in special driving situations.
  • Relevant luminous flux is to be understood as the luminous flux which can enter via the light entry surface of the lens; This luminous flux thus includes those light rays which are emitted within the aperture angle of the lens from the LED light source.
  • a light-emitting diode has a specific emission behavior, so that usually a portion of the light rays - unless it is deflected - is emitted in directions at angles which are greater than the opening angle of the lens, so that this light does not enter the lens and thus is basically usable for the light function.
  • Light from the LED light source, which is radiated at a larger angle than the opening angle no longer represents "relevant" luminous flux.
  • LED light source 6, 7; 6 ', 7' (the reference numerals 6, 6 'denote the respective light-emitting diode, the reference numerals 7, 7 the associated LED prints), which together form a secondary light source which is arranged with respect to the opening (10) of the lens 3 such in that the light emitted by the secondary light source is emitted substantially onto the diffusing screen 3, so that essentially no, preferably no light flux of the secondary light source exits through the opening 10 of the diffusing screen 3.
  • the lens 3 can be illuminated, through which the lens can be homogeneously illuminated, through the opening in the lens, the light from the primary light source can pass unhindered, so that the main light function is not affected.
  • Both the LED light source 8, 9 of the primary light source and the LED light sources 6, 7; 6 ', 7' of the secondary light source are mounted on a heat sink 4 with cooling fins 5. On the special shape of the heat sink will be discussed in more detail below.
  • FIG. 1 forms an axis through the LED light source 8, 9 of the primary light source and through the opening 10 of the lens 3, the optical axis 100.
  • the additional LED light sources 6, 7; 6 ', 7' of the secondary light source are outside the optical axis 100.
  • the light module In order to achieve an optimal, homogeneous illumination of the lens or homogeneous as possible appearance of the lens and thus the light module is also provided that the LED light sources 6, 7; 6 ', 7' of the secondary light source opposite to the light exit direction, with respect to the primary light source 8, 9 is arranged offset to the rear. With increasing distance of the LED light source (s) of the secondary light source, a more homogeneous illumination of the lens is achieved.
  • the heat sink 4 has a front plane to which the primary LED light source 8, 9 is mounted and another, recessed plane for the secondary LED light sources 6, 7; 6 ', 7'.
  • the primary LED light source 8, 9 is mounted and another, recessed plane for the secondary LED light sources 6, 7; 6 ', 7'.
  • only one such plane is provided for the secondary LED light sources, but in principle two or more such planes may also be provided.
  • the LED light source 8, 9 of the primary light source and the LED light sources 6, 7; 6 ', 7' of the secondary light source can be controlled separately, so that the primary light source and the secondary light source can be switched on and off independently of each other.
  • the secondary light source of the light module in the vertical direction below a horizontal plane 101 by the LED light source of the primary light source n LED light sources 6 ', 7' and above the horizontal plane m LED light sources 6, 7, where m ⁇ n.
  • the LED light source (s) above and below the horizontal plane 101 are each arranged symmetrically in the horizontal direction with respect to a vertical plane through the optical axis 100.
  • LED light sources 6 ', 7' of the secondary light source are arranged laterally next to the LED light source 8, 9 of the primary light source, namely in the concrete example in FIG FIG. 2 respectively.
  • FIG. 3 one to each side.
  • the dimensions of the opening 10 in the lens 3, such as diameter, side dimensions, etc., and the distance of the LED light source 8, 9 of the primary light source are selected to the lens 3 such that of the LED light source 8, 9, which forms the primary light source, all emitted light rays, which are within an opening angle of the lens 2, pass through the opening 10 can.
  • the rays emitted by the primary LED light source, which just reach the aperture angle of the lens, ie which are just left through by the aperture 10, are denoted by S1 ( FIG. 1 ).
  • the size of the opening in the lens is dependent on the distance of the disc to the LED light source of the primary light source and can be derived from the opening angle of the lens. Since the aperture of the lens is imaged directly over the lens, it is advantageous to make this aperture as small as possible. In addition, the shape of the opening is preferably adapted to the shape of the lens trimming.
  • the lens is positioned as close as possible to the LED light source of the primary light source.
  • the shape of the lens is preferably designed so that it is visible through the projection lens, viewed from the outside, from all viewing angles, so that a homogeneous appearance of the lens can be generated.
  • the dimensions of the opening 10 in the lens 3, such as diameter, side dimensions, etc. and / or the arrangement of the LED light sources 6, 7; 6 ', 7' of the secondary light source with respect to the opening 10 of the lens 3 and / or the distance of the LED light sources 6, 7; 6 ', 7' of the secondary light source are selected to the lens 3 such that of the LED light sources 6, 7; 6 ', 7', which form the secondary light source, light beams only in areas of the lens 3, which have no opening 10, are emitted.
  • the dimensions of the opening 10 in the lens 3, such as diameter, side dimensions, etc. and / or the arrangement of the LED light sources 6, 7; 6 ', 7' of the secondary light source with respect to the opening 10 of the lens 3 and / or the distance of the LED light sources 6, 7; 6 ', 7' of the secondary light source are selected to the lens 3 such that of the LED light sources 6, 7; 6 ', 7', which form the secondary light source, light rays are emitted to the edge of the opening 10 of the lens 3.
  • FIG. 1 shows those rays S2 of the secondary LED light sources 6, 7; 6 ', 7', which just reach the edge of the opening 10, rays which are radiated at an even greater angle and could escape through the opening 10 are already through the heat sink, ie through the dome, on which the primary light source sits, depending on the surface texture of the heat sink or its dome absorbed or (diffused) reflected.
  • the distance between the secondary LED light sources to the dome of the heat sink 4 must be in direct proportion to the distance of the secondary LED light sources to the lens, otherwise too large shading effects occur through the dome. Slight shading by the dome can be compensated by the light guide effect in the lens.
  • the tuning such as the secondary LED light sources 6, 7; 6 ', 7' are to be arranged on the heat sink, on the one hand to achieve a maximum and uniform illumination of the lens 3 without light passes through the opening 10, of course, also depends on the geometry of the heat sink 4.
  • the uniform illumination of the lens is essentially defined by 3 parameters: distance of the secondary LED light source (s) to the lens, number of light sources and arrangement of the light source about the optical axis of the lens, preferably in one or more planes behind the lens, to achieve the necessary distance of the secondary LED light sources to the lens.
  • the homogeneity of the lens is directly proportional to the number of secondary LED light sources and the distance of the secondary LED light sources to the lens, wherein a uniform distribution of the secondary LED light sources is advantageous.
  • the limiting factor for these parameters is the space available for the light module. This results in certain optimized variants, such as those in FIG. 1 graduated arrangement of LED light sources.
  • the secondary LED light sources could also be positioned in a plane with the primary LED light source. As a result, a homogeneous luminous impression can be realized even with a small number of LEDs. In this case, however, the lens should be curved forward or obliquely forward.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The module (1) has a diffusion disk (3) arranged between LED-light sources (8, 9) and a lens (2). The disk has an opening (10) for direct passage of portion of light that is emitted from the light sources, where the direct portion of light that is discharged via the opening is projected via the lens for generating light function e.g. drive light function, in an area in front of a motor vehicle. The LED-light sources are designed as primary light sources i.e. infrared LED-light sources. Other LED-light sources (6, 7) are designed as secondary light sources i.e. high-power LED-light sources.

Description

Die Erfindung betrifft ein LED-Lichtmodul für ein Kraftfahrzeug bzw. für einen Scheinwerfer für ein Kraftfahrzeug, wobei das Lichtmodul eine Linse und eine LED-Lichtquelle umfasst.The invention relates to an LED light module for a motor vehicle or for a headlight for a motor vehicle, wherein the light module comprises a lens and an LED light source.

Eine solche LED-Lichtquelle kann aus einer oder mehreren Leuchtdioden (LED) aufgebaut sein, die derart angeordnet sind, dass sie "ein" gemeinsames Lichtbündel bilden.Such an LED light source may be constructed of one or more light emitting diodes (LEDs) arranged to form a "common" light beam.

Ein eingangs erwähntes Lichtmodul bestehet im Wesentlichen aus einer (oder mehreren) LED-Lichtquelle(n), z.B. in Form einer Hochleistungs-Leuchtdiode, und einer Linse, kann zur Erzeugung einer Lichtverteilung verwendet werden, welche Lichtanteile über der HD-Linie im erzeugten Lichtbild beinhaltet. Die damit realisierte Lichtfunktion (Beispiel: Fernlicht, Objektbeleuchtung,...) kann nur in speziellen Fahrsituationen aktiviert werden, eben nur dann, wenn ein Objekt zur Beleuchtung vor dem Fahrzeug vorhanden ist oder die Situation das Einschalten des Fernlichtes erlaubt.An initially mentioned light module consists essentially of one (or more) LED light source (s), e.g. in the form of a high-power light-emitting diode, and a lens, can be used to generate a light distribution which contains light components above the HD line in the generated light image. The thus realized light function (example: high beam, object lighting, ...) can be activated only in special driving situations, just then, if an object for illumination in front of the vehicle is present or the situation allows the switching on of the high beam.

Ein solches Lichtmodul ist dementsprechend nur sehr selten aktiv, je nach Art (Fernlicht, Objektbeleuchtung, ...) des Lichtmoduls oftmals nur wenige Minuten pro Stunde. Ein solches Lichtmodul kann deshalb in die Gestaltung des Nachtdesigns des Fahrzeuges bzw. des Fahrzeugscheinwerfers nicht miteingebunden werden, d.h. der von dem Lichtmodul nach Außen hin sichtbare Bereich erscheint in der Nacht, wenn das Lichtmodul nicht aktiviert ist, dunkel, was oftmals als unschön empfunden wird.Accordingly, such a light module is only rarely active, depending on the type (high beam, object lighting, ...) of the light module often only a few minutes per hour. Such a light module can therefore not be included in the design of the night design of the vehicle or the vehicle headlamp, i. E. the visible to the outside of the light module area appears at night, when the light module is not activated, dark, which is often perceived as unpleasant.

Aufgrund der zur Realisierung der Lichtfunktion notwendigen Auslegung des Lichtmoduls (hohe maximale Beleuchtungsstärken, z.B. ca. 150 Lux) und der entsprechend beschränkten Möglichkeit der Reduktion der LED Lichtleistung ist es auch nicht möglich, die Lichtfunktion in gedimmtem Zustand zu betreiben, ohne dabei die gesetzlich vorgegebenen Streulichtwerte zu überschreiten.Due to the necessary for the realization of the light function design of the light module (high maximum illuminance, eg about 150 lux) and the corresponding limited possibility of reducing the LED light output, it is also not possible to operate the light function in a dimmed state, without the legally prescribed To exceed scattered light values.

Es ist eine Aufgabe der Erfindung, eine Lösung für das oben genannte Problem anzugeben.It is an object of the invention to provide a solution to the above problem.

Diese Aufgabe wird mit einem eingangs erwähnten Lichtmodul dadurch gelöst, dass erfindungsgemäß in Lichtaustrittsrichtung gesehen zwischen der LED-Lichtquelle und der Linse eine Streuscheibe angeordnet ist, wobei die Streuscheibe zumindest eine Öffnung zum direkten Durchtritt von zumindest einem Anteil des von der LED-Lichtquelle emittierten Lichtes aufweist, und wobei der durch die Öffnung der Streuscheibe austretende Direktanteil des von der LED-Lichtquelle emittierten Lichtes über die Linse zur Erzeugung einer Lichtfunktion in den Bereich vor dem Kraftfahrzeug projiziert wird.This object is achieved with a light module mentioned in the introduction, that according to the invention in the light exit direction between the LED light source and the lens a lens is arranged, wherein the lens at least one opening for the direct passage of at least a portion of the emitted light from the LED light source and wherein the direct component emerging through the opening of the lens the light emitted by the LED light source is projected via the lens to produce a light function in the area in front of the motor vehicle.

Durch Vorsehen einer Streuscheibe kann die Linse homogen ausgeleuchtet werden, wobei durch die Öffnung in der Streuscheibe das Licht von der Primär-Lichtquelle ungehindert durchtreten kann, sodass die Hauptlichtfunktion nicht beeinflusst wird.By providing a lens, the lens can be homogeneously illuminated, whereby the light from the primary light source can pass unhindered through the opening in the lens, so that the main light function is not affected.

Es wird auf diese Weise möglich, das Lichtmodul auch bei nicht aktivierter Lichtfunktion in das Scheinwerfer-Design einzubinden, indem die Streuscheibe angeleuchtet wird und entsprechend, etwa bei Dunkelheit, das Lichtmodul optisch in Erscheinung tritt und nicht dunkel erscheint.It is possible in this way to incorporate the light module in the headlight design even when the light function is not activated by the lens is illuminated and accordingly, for example in the dark, the light module appears visually and does not appear dark.

Bei einer konkreten Ausgestaltung des erfindungsgemäßen LED-Lichtmoduls ist vorgesehen, dass die LED-Lichtquelle als Primär-Lichtquelle ausgebildet ist, deren im Wesentlichen gesamter emittierter, relevanter Lichtstrom durch die Öffnung der Streuscheibe zur Erzeugung der Lichtfunktion austritt.In a specific embodiment of the LED light module according to the invention, it is provided that the LED light source is embodied as a primary light source whose substantially entire emitted, relevant luminous flux exits through the opening of the lens to produce the light function.

Unter "relevanter" Lichtstrom ist jener Lichtstrom zu verstehen, der über die Lichteintrittsfläche der Linse in diese eintreten kann; dieser Lichtstrom umfasst also jene Lichtstrahlen, welche innerhalb des Öffnungswinkels der Linse von der LED-Lichtquelle abgestrahlt werden. Je nach Ausgestaltung weist eine Leuchtdiode ein bestimmtes Abstrahlverhalten auf, sodass üblicherweise ein Teil der Lichtstrahlen - sofern er nicht umgelenkt wird - in Richtungen unter Winkeln abgestrahlt wird, welche größer sind als der Öffnungswinkel der Linse, sodass dieses Licht nicht in die Linse gelangt und somit für die Lichtfunktion prinzipiell nutzbar ist. Licht von der LED-Lichtquelle, welches unter einem größeren Winkel als der Öffnungswinkel abgestrahlt wird, stellt nicht mehr "relevanten" Lichtstrom dar."Relevant" luminous flux is to be understood as the luminous flux which can enter via the light entry surface of the lens; This luminous flux thus includes those light rays which are emitted within the aperture angle of the lens from the LED light source. Depending on the embodiment, a light-emitting diode has a specific emission behavior, so that usually a portion of the light rays - unless it is deflected - is emitted in directions at angles which are greater than the opening angle of the lens, so that this light does not enter the lens and thus is basically usable for the light function. Light from the LED light source, which is radiated at a larger angle than the opening angle, no longer represents "relevant" luminous flux.

Bei einer besonders vorteilhaften Ausgestaltung der Erfindung ist zumindest eine weitere LED-Lichtquelle als Sekundärlichtquelle vorgesehen, welche in Bezug auf die Öffnung der Streuscheibe derart angeordnet ist, dass das von der Sekundärlichtquelle emittierte Licht im Wesentlichen auf die Streuscheibe emittiert wird, derart dass im Wesentlichen kein Lichtstrom der Sekundärlichtquelle durch die Öffnung der Streuscheibe austritt.In a particularly advantageous embodiment of the invention, at least one further LED light source is provided as a secondary light source, which is arranged with respect to the opening of the lens so that the light emitted by the secondary light source is emitted substantially to the lens so that substantially no Luminous flux of the secondary light source exits through the opening of the lens.

Eine solche LED-Lichtquelle kann aus einer oder mehreren Leuchtdioden (LED) aufgebaut sein, die ein "gemeinsames" Lichtbündel bilden. Die Sekundärlichtquelle kann dann - siehe auch unten - aus einer oder mehreren solcher LED-Lichtquellen aufgebaut sein.Such an LED light source can be constructed from one or more light-emitting diodes (LEDs), which form a "common" light beam. The secondary light source can then - see below - be constructed from one or more such LED light sources.

Um eine homogen leuchtende Fläche zu erzeugen, wird eine Streuscheibe (diffuse Scheibe) verwendet, die von einer oder mehreren zusätzlichen LED-Lichtquellen beleuchtet wird.In order to produce a homogeneously luminous surface, a diffusing screen (diffuse disk) is used which is illuminated by one or more additional LED light sources.

Dabei kann vorgesehen sein, dass eine Achse durch die LED-Lichtquelle der Primär-Lichtquelle und die Öffnung der Streuscheibe die optische Achse bildet und dass die zumindest eine LED-Lichtquelle der Sekundärlichtquelle außerhalb der optischen Achse liegt.It can be provided that an axis by the LED light source of the primary light source and the opening of the lens forms the optical axis and that the at least one LED light source of the secondary light source is outside the optical axis.

Auf diese Weise kann auf einfache Weise bereits verhindert werden, dass Licht von der Sekundär-Lichtquelle durch die Öffnung der Streuscheibe austritt, was unerwünschte Störstrahlung erzeugen würde.In this way it can already be prevented in a simple manner that light exits the secondary light source through the opening of the lens, which would produce unwanted interference.

Um eine optimale, möglichst homogene Ausleuchtung der Streuscheibe bzw. ein möglichst homogenes Erscheinungsbild der Streuscheibe und somit des Lichtmoduls zu erreichen, kann weiters noch vorgesehen sein, dass die zumindest eine LED-Lichtquelle der Sekundär-Lichtquelle entgegen der Lichtaustrittsrichtung, in Bezug auf die Primär-Lichtquelle nach hinten versetzt angeordnet ist.In order to achieve an optimum, as homogeneous as possible illumination of the lens or a homogeneous appearance as possible of the lens and thus the light module, may further be provided that the at least one LED light source of the secondary light source against the light exit direction, with respect to the primary Light source is arranged offset to the rear.

Mit zunehmender Entfernung der LED-Lichtquelle(n) der Sekundär-Lichtquelle wird eine homogenere Ausleuchtung der Streuscheibe erreicht.With increasing distance of the LED light source (s) of the secondary light source, a more homogeneous illumination of the lens is achieved.

Im Sinne einer homogenen Ausleuchtung der Streuscheibe ist es weiters, wenn wie bei einer vorteilhaften Variante vorgesehen die Sekundär-Lichtquelle zwei oder mehrere LED-Lichtquellen umfasst.In the sense of a homogeneous illumination of the lens, it is further if, as provided in an advantageous variant, the secondary light source comprises two or more LED light sources.

Zweckmäßig ist es weiters, wenn die LED-Lichtquelle der Primär-Lichtquelle und die zumindest eine LED-Lichtquelle der Sekundär-Lichtquelle getrennt ansteuerbar sind, sodass die Primär-Lichtquelle und die Sekundär-Lichtquelle unabhängig voneinander ein- und ausgeschaltet werden können.It is expedient if the LED light source of the primary light source and the at least one LED light source of the secondary light source can be controlled separately, so that the primary light source and the secondary light source can be switched on and off independently.

Weiters ist es von Vorteil, wenn - in eingebautem Zustand des Lichtmoduls in einen Fahrzeugscheinwerfer - die Sekundär-Lichtquelle des Lichtmoduls in vertikaler Richtung unterhalb einer Horizontalebene, welche beispielsweise durch die LED-Lichtquelle der Primär-Lichtquelle verläuft, n LED-Lichtquellen und oberhalb der Horizontalebene m LED-Lichtquellen aufweist, wobei m < n gilt.Furthermore, it is advantageous if - in the installed state of the light module in a vehicle headlight - the secondary light source of the light module in the vertical direction below a horizontal plane, which runs for example by the LED light source of the primary light source, n LED light sources and above the Horizontal plane has m LED light sources, where m <n.

Da die Linse des Lichtmoduls zumeist aus Blickwinkeln oberhalb dieser Horizontalen betrachtet wird, ist es von Vorteil, wenn die Anzahl der LEDs im unteren Bereich erhöht ist, da dieser Bereich in den Winkelbereich oberhalb der Horizontalen abgebildet wird und so eine optisch ansprechendere Ausleuchtung der Linse erreicht werden kann.Since the lens of the light module is mostly viewed from angles above this horizontal, it is advantageous if the number of LEDs in the lower area is increased, since this area is imaged in the angular range above the horizontal and so a more visually appealing illumination of the lens can be achieved.

Genauso wie aber die optische Achse der Linse nicht unbedingt durch die LED bzw. bei mehreren LED's durch deren geometrischen Mittelpunkt verlaufen muss, muss auch die Horizontalebene nicht unbedingt durch die Primär-LED-Lichtquelle verlaufen sondern kann durch die Linse definiert sein, welche in vertikaler Richtung verschoben sein kann, wodurch sich auch die Lage der Abbildung (Blickwinkel) ändert.Just as the optical axis of the lens does not necessarily have to pass through the LED or, in the case of several LEDs, through its geometric center, the horizontal plane does not necessarily have to pass through the primary LED light source, but can also be defined by the lens Direction may be shifted, which also changes the position of the image (angle).

Grundsätzlich optimal wäre eine hohe Anzahl an LED-Lichtquellen für die Sekundär-Lichtquelle, was aber durch Kosten und verfügbaren Bauraum des Scheinwerfers beschränkt ist. Bei einer einfachen, günstigen Variante der Erfindung, mit welcher ansprechende Ergebnisse bei der Ausleuchtung der Linse/Streuscheibe erzielt werden können, ist m = 0.Basically optimal would be a high number of LED light sources for the secondary light source, but this is limited by costs and available space of the spotlight. In a simple, favorable variant of the invention, with which appealing results can be achieved in the illumination of the lens / lens, m = 0.

Im Sinne einer möglichst gleichmäßigen Ausleuchtung ist es weiters, wenn die LED-Lichtquelle(n) oberhalb bzw. unterhalb der Horizontalebene jeweils symmetrisch in horizontaler Richtung in Bezug auf eine Vertikalebene durch die optische Achse angeordnet ist/sind.In terms of the most uniform possible illumination, it is further, when the LED light source (s) above / below the horizontal plane are each arranged symmetrically in the horizontal direction with respect to a vertical plane through the optical axis / are.

Außerdem kann in diesem Zusammenhang noch vorgesehen sein, dass seitlich neben der LED-Lichtquelle der Primär-Lichtquelle weitere LED-Lichtquellen der Sekundär-Lichtquelle angeordnet sind.In addition, it may be provided in this connection that further LED light sources of the secondary light source are arranged laterally next to the LED light source of the primary light source.

Um den Lichtstrom von der LED-Lichtquelle der Primär-Lichtquelle optimal nutzen zu können, ist weiters mit Vorteil vorgesehen, dass die Abmessungen der Öffnung in der Streuscheibe, wie etwa Durchmesser, Seitenabmessungen, etc. und/oder die Anordnung der LED-Lichtquelle der Primär-Lichtquelle in Bezug auf die Öffnung der Streuscheibe und/oder der Abstand der LED-Lichtquelle der Primär-Lichtquelle zu der Streuscheibe derart gewählt sind, dass von der LED-Lichtquelle, welche die Primär-Lichtquelle bildet, alle emittierten Lichtstrahlen, welche innerhalb eines Öffnungswinkels der Linse liegen, durch die Öffnung durchtreten können.In order to make optimum use of the luminous flux from the LED light source of the primary light source, it is further provided with advantage that the dimensions of the opening in the lens, such as diameter, side dimensions, etc. and / or the arrangement of the LED light source Primary light source with respect to the opening of the lens and / or the distance of the LED light source of the primary light source to the lens are selected such that of the LED light source, which forms the primary light source, all emitted light rays, which within an opening angle of the lens can pass through the opening.

Die Größe der Öffnung in der Streuscheibe ist abhängig von der Entfernung der Scheibe zu der LED-Lichtquelle der Primär-Lichtquelle und lässt sich aus dem Öffnungswinkel der Linse ableiten. Da die Öffnung der Streuscheibe direkt über die Linse abgebildet wird, ist es von Vorteil, diese Öffnung so klein wie möglich auszuführen. Außerdem ist vorzugsweise die Form der Öffnung an die Form des Linsenbeschnittes angepasst.The size of the opening in the lens is dependent on the distance of the disc to the LED light source of the primary light source and can be derived from the opening angle of the lens. Since the aperture of the lens is imaged directly over the lens, it is advantageous to make this aperture as small as possible. In addition, the shape of the opening is preferably adapted to the shape of the lens trimming.

Um die Größe der Öffnung zu minimieren, wird die Streuscheibe möglichst nahe an der LED-Lichtquelle der Primär-Lichtquelle positioniert.To minimize the size of the aperture, the lens is positioned as close as possible to the LED light source of the primary light source.

Wenn hier von der Form des Linsenbeschnittes die Rede ist, so ist insbesondere von Bedeutung, welche Form die Lichteintrittsfläche der Linse aufweist. Diese weist eine ebene oder gekrümmte Fläche mit einer beispielsweise kreisförmigen, (vier-, recht-)eckigen, bzw. je nach Anwendung beliebigen Gestalt auf, welche Gestalt hier als "Form des Linsenbeschnittes" bezeichnet wird. Die Form der Öffnung ist dabei vorzugsweise von den Proportionen her identisch zu dem Linsenbeschnitt.If the shape of the lens trimming is mentioned here, then it is of particular importance which shape the light entry surface of the lens has. This has a flat or curved surface with an example circular, (four-, right-) square, or depending on the application arbitrary shape, which shape is referred to here as "shape of the lens trimming". The shape of the opening is preferably identical in terms of proportions to the lens trimming.

Die Form der Streuscheibe ist vorzugsweise derart ausgeführt, dass sie durch die Projektionslinse hindurch, von Außen betrachtet, aus sämtlichen Betrachtungswinkeln sichtbar ist, sodass sich ein homogen wirkendes Erscheinungsbild der Linse erzeugen lässt.The shape of the lens is preferably designed so that it is visible through the projection lens, viewed from the outside, from all viewing angles, so that a homogeneous appearance of the lens can be generated.

Weiters ist es von Vorteil, wenn die Abmessungen der Öffnung in der Streuscheibe, wie etwa Durchmesser, Seitenabmessungen, etc. und/oder die Anordnung der zumindest einen LED-Lichtquelle der Sekundär-Lichtquelle in Bezug auf die Öffnung der Streuscheibe und/oder der Abstand der zumindest einen LED-Lichtquelle der Sekundär-Lichtquelle zu der Streuscheibe derart gewählt sind, dass von der zumindest einen LED-Lichtquelle, welche die Sekundär-Lichtquelle bildet, Lichtstrahlen lediglich in Bereiche der Streuscheibe, welche keine Öffnung aufweisen, emittiert werden.Furthermore, it is advantageous if the dimensions of the opening in the lens, such as diameter, side dimensions, etc. and / or the arrangement of the at least one LED light source of the secondary light source with respect to the opening of the lens and / or the distance the at least one LED light source of the secondary light source is selected to the lens so that emitted from the at least one LED light source, which forms the secondary light source, light rays only in areas of the lens, which have no opening.

Auf diese Weise kann kein Durchtritt von Sekundär-Licht durch die Öffnung der Streuscheibe stattfinden, was unerwünschte Effekte bewirken würde.In this way, no passage of secondary light through the opening of the lens can take place, which would cause undesirable effects.

Insbesondere ist es von Vorteil, wenn die Abmessungen der Öffnung in der Streuscheibe, wie etwa Durchmesser, Seitenabmessungen, etc. und/oder die Anordnung der zumindest einen LED-Lichtquelle der Sekundär-Lichtquelle in Bezug auf die Öffnung der Streuscheibe und/oder der Abstand der zumindest einen LED-Lichtquelle der Sekundär-Lichtquelle zu der Streuscheibe derart gewählt sind, dass von der zumindest einen LED-Lichtquelle, welche die Sekundär-Lichtquelle bildet, Lichtstrahlen bis an den Rand der Öffnung der Streuscheibe abgestrahlt werden.In particular, it is advantageous if the dimensions of the opening in the lens, such as diameter, side dimensions, etc. and / or the arrangement of the at least one LED light source of the secondary light source with respect to the opening of the lens and / or the distance the at least one LED light source of the secondary light source to the lens are selected such that from the at least one LED light source, which forms the secondary light source, light rays are emitted to the edge of the opening of the lens.

Die gleichmäßige Beleuchtung der Streuscheibe wird im Wesentlichen durch 3 Parameter definiert: Abstand der Sekundär-LED-Lichtquelle(n) zur Streuscheibe, Anzahl der Lichtquellen und Anordnung der Lichtquelle um die optische Achse der Linse, vorzugsweise in einer oder mehreren Ebenen hinter der Scheibe, um den notwendigen Abstand der Sekundär-LED-Lichtquellen zu der Streuscheibe zu erreichen.The uniform illumination of the lens is essentially defined by 3 parameters: distance of the secondary LED light source (s) to the lens, number of light sources and arrangement of the light source about the optical axis of the lens, preferably in one or more planes behind the lens, to achieve the necessary distance of the secondary LED light sources to the lens.

Generell gilt, die Homogenität der Linse ist direktproportional zur Anzahl der Sekundär-LED-Lichtquellen und dem Abstand der Sekundär-LED-Lichtquellen zu der Streuscheibe, wobei eine gleichmäßige Verteilung der Sekundär-LED-Lichtquellen vorteilhaft ist.In general, the homogeneity of the lens is directly proportional to the number of secondary LED light sources and the distance of the secondary LED light sources to the lens, wherein a uniform distribution of the secondary LED light sources is advantageous.

Limitierend wirkt auf diese Parameter der für das Lichtmodul vorhandene Bauraum. Daraus ergeben sich bestimmte optimierte Varianten.The limiting factor for these parameters is the space available for the light module. This results in certain optimized variants.

Weiters kann auch noch vorgesehen sein, dass der Rand der Öffnung der Streuscheibe nach hinten, in Richtung der Primär-Lichtquelle gerichtet, sich verjüngend ausgebildet ist, z.B. trapezförmig, um optimal an den Strahlenverlauf der Grenzstrahlen der Primär-Lichtquelle (Grenzstrahlen sind jene Lichtstrahlen, welche unter dem Öffnungswinkel der Linse auf diese auftreffen) angepasst zu sein.Furthermore, it can also be provided that the edge of the opening of the lens to the rear, directed in the direction of the primary light source, is tapered, e.g. trapezoidal in order to be optimally adapted to the beam path of the boundary rays of the primary light source (boundary rays are those light rays which impinge on the latter at the opening angle of the lens).

Bei der LED-Lichtquelle der Primär-Lichtquelle kann es sich beispielsweise um eine Infrarot-Lichtquelle handeln.For example, the LED light source of the primary light source may be an infrared light source.

Im Folgenden ist die Erfindung an Hand der Zeichnung näher erörtert. In dieser zeigt

  • Fig. 1 ein erfindungsgemäßes Lichtmodul in einem Vertikalschnitt entlang der optischen Achse des Moduls,
  • Fig. 2 eine schematische Vorderansicht des Lichtmoduls in einer ersten Variante, und
  • Fig. 3 eine weitere Variante eines Lichtmoduls nach der Erfindung in einer schematischen Vorderansicht.
In the following the invention is discussed in more detail with reference to the drawing. In this shows
  • Fig. 1 a light module according to the invention in a vertical section along the optical axis of the module,
  • Fig. 2 a schematic front view of the light module in a first variant, and
  • Fig. 3 a further variant of a light module according to the invention in a schematic front view.

Die Figuren 1 und 2 zeigen ein erstes Lichtmodul 1 entsprechend der Erfindung für ein Kraftfahrzeug bzw. für einen Scheinwerfer für ein Kraftfahrzeug. Das LED-Lichtmodul 1 umfasst eine Linse 2 und eine LED-Lichtquelle 8, 9, wobei diese LED-Lichtquelle aus einem Print 8 und einer Leuchtdiode 9 besteht. Bei dieser LED-Lichtquelle kann es sich um eine Hochleistungs-Leuchtdiode handeln, bzw. kann es sich dabei auch um eine Infrarot-Leuchtdiode handeln.The Figures 1 and 2 show a first light module 1 according to the invention for a motor vehicle or for a headlight for a motor vehicle. The LED light module 1 comprises a lens 2 and an LED light source 8, 9, this LED light source consisting of a print 8 and a light-emitting diode 9. This LED light source can be a high-performance light-emitting diode, or it can also be an infrared light-emitting diode.

Zwischen dieser LED-Lichtquelle 8, 9 und der Linse 2 ist eine Streuscheibe 3 angeordnet, wobei die Streuscheibe 3 eine Öffnung 10 zum direkten Durchtritt von zumindest einem Anteil des von der LED-Lichtquelle 8, 9 emittierten Lichtes aufweist. Dieser durch die Öffnung 10 der Streuscheibe 3 austretende Direktanteil des von der LED-Lichtquelle 8, 9 emittierten Lichtes wird über die Linse 2 zur Erzeugung einer Lichtfunktion in den Bereich vor dem Kraftfahrzeug projiziert.Between this LED light source 8, 9 and the lens 2, a lens 3 is arranged, wherein the lens 3 has an opening 10 for the direct passage of at least a portion of the light emitted from the LED light source 8, 9. This exiting through the opening 10 of the lens 3 direct share emitted by the LED light source 8, 9 Light is projected via the lens 2 to generate a light function in the area in front of the motor vehicle.

Die LED-Lichtquelle 8, 9 ist als Primär-Lichtquelle ausgebildet ist, deren im Wesentlichen gesamter emittierter, relevanter Lichtstrom durch die Öffnung 10 der Streuscheibe 3)zur Erzeugung der Lichtfunktion austritt. Bei der Lichtfunktion handelt es sich z.B. um Fernlicht oder um eine Objektbeleuchtung (z.B. Fußgänger), welche Lichtfunktion entsprechend nur in speziellen Fahrsituationen aktiviert ist.The LED light source 8, 9 is designed as a primary light source, the substantially entire emitted, relevant luminous flux through the opening 10 of the lens 3) exits to produce the light function. The light function is e.g. for high beam or for object lighting (e.g. pedestrian), which light function is accordingly activated only in special driving situations.

Unter "relevanter" Lichtstrom ist jener Lichtstrom zu verstehen, der über die Lichteintrittsfläche der Linse in diese eintreten kann; dieser Lichtstrom umfasst also jene Lichtstrahlen, welche innerhalb des Öffnungswinkels der Linse von der LED-Lichtquelle abgestrahlt werden. Je nach Ausgestaltung weist eine Leuchtdiode ein bestimmtes Abstrahlverhalten auf, sodass üblicherweise ein Teil der Lichtstrahlen - sofern er nicht umgelenkt wird - in Richtungen unter Winkeln abgestrahlt wird, welche größer sind als der Öffnungswinkel der Linse, sodass dieses Licht nicht in die Linse gelangt und somit für die Lichtfunktion prinzipiell nutzbar ist. Licht von der LED-Lichtquelle, welches unter einem größeren Winkel als der Öffnungswinkel abgestrahlt wird, stellt nicht mehr "relevanten" Lichtstrom dar."Relevant" luminous flux is to be understood as the luminous flux which can enter via the light entry surface of the lens; This luminous flux thus includes those light rays which are emitted within the aperture angle of the lens from the LED light source. Depending on the embodiment, a light-emitting diode has a specific emission behavior, so that usually a portion of the light rays - unless it is deflected - is emitted in directions at angles which are greater than the opening angle of the lens, so that this light does not enter the lens and thus is basically usable for the light function. Light from the LED light source, which is radiated at a larger angle than the opening angle, no longer represents "relevant" luminous flux.

Außerdem sind noch weitere LED-Lichtquelle 6, 7; 6', 7' (die Bezugszeichen 6, 6' bezeichnen die jeweilige Leuchtdiode, die Bezugszeichen 7, 7 die zugehörigen LED-Prints) vorgesehen, welche gemeinsam eine Sekundärlichtquelle bilden, welche in Bezug auf die Öffnung (10) der Streuscheibe 3 derart angeordnet sind, dass das von der Sekundärlichtquelle emittierte Licht im Wesentlichen auf die Streuscheibe 3 emittiert wird, derart dass im Wesentlichen kein, vorzugsweise gar kein Lichtstrom der Sekundärlichtquelle durch die Öffnung 10 der Streuscheibe 3 austritt.In addition, other LED light source 6, 7; 6 ', 7' (the reference numerals 6, 6 'denote the respective light-emitting diode, the reference numerals 7, 7 the associated LED prints), which together form a secondary light source which is arranged with respect to the opening (10) of the lens 3 such in that the light emitted by the secondary light source is emitted substantially onto the diffusing screen 3, so that essentially no, preferably no light flux of the secondary light source exits through the opening 10 of the diffusing screen 3.

Mit diesen zusätzlichen LED-Lichtquellen kann die Streuscheibe 3 beleuchtet werden, über welche die Linse homogen ausgeleuchtet werden kann, wobei durch die Öffnung in der Streuscheibe das Licht von der Primär-Lichtquelle ungehindert durchtreten kann, sodass die Hauptlichtfunktion nicht beeinflusst wird.With these additional LED light sources, the lens 3 can be illuminated, through which the lens can be homogeneously illuminated, through the opening in the lens, the light from the primary light source can pass unhindered, so that the main light function is not affected.

Es wird auf diese Weise möglich, das Lichtmodul auch bei nicht aktivierter Lichtfunktion in das Scheinwerfer-Design einzubinden, indem die Streuscheibe angeleuchtet wird und entsprechend, etwa bei Dunkelheit, das Lichtmodul optisch in Erscheinung tritt und nicht dunkel erscheint.It is possible in this way to incorporate the light module in the headlight design even when the light function is not activated by the lens is illuminated and accordingly, for example in the dark, the light module appears visually and does not appear dark.

Aufgrund der zur Realisierung der Lichtfunktion notwendigen Auslegung des Lichtmoduls (hohe maximale Beleuchtungsstärken, z.B. ca. 150 Lux) und der entsprechend beschränkten Möglichkeit der Reduktion der LED Lichtleistung ist es auch nicht möglich, die Lichtfunktion in gedimmtem Zustand zu betreiben, ohne dabei die gesetzlich vorgegebenen Streulichtwerte zu überschreiten.Due to the necessary for the realization of the light function design of the light module (high maximum illuminance, eg about 150 lux) and the corresponding limited possibility of reducing the LED light output, it is also not possible to operate the light function in a dimmed state, without the legally prescribed To exceed scattered light values.

Sowohl die LED-Lichtquelle 8, 9 der Primär-Lichtquelle als auch die LED-Lichtquellen 6, 7; 6', 7' der Sekundär-Lichtquelle sind auf einem Kühlkörper 4 mit Kühlrippen 5 angebracht. Auf die spezielle Form des Kühlkörpers wird weiter unten noch näher eingegangen.Both the LED light source 8, 9 of the primary light source and the LED light sources 6, 7; 6 ', 7' of the secondary light source are mounted on a heat sink 4 with cooling fins 5. On the special shape of the heat sink will be discussed in more detail below.

Wie Figur 1 zu entnehmen ist, bildet eine Achse durch die LED-Lichtquelle 8, 9 der Primär-Lichtquelle und durch die Öffnung 10 der Streuscheibe 3 die optische Achse 100. Die zusätzlichen LED-Lichtquellen 6, 7; 6', 7' der Sekundärlichtquelle liegen außerhalb der optischen Achse 100.As FIG. 1 can be seen, forms an axis through the LED light source 8, 9 of the primary light source and through the opening 10 of the lens 3, the optical axis 100. The additional LED light sources 6, 7; 6 ', 7' of the secondary light source are outside the optical axis 100.

Auf diese Weise kann auf einfache Weise bereits verhindert werden, dass Licht von der Sekundär-Lichtquelle durch die Öffnung der Streuscheibe austritt, was unerwünschte Störstrahlung erzeugen würde.In this way it can already be prevented in a simple manner that light exits the secondary light source through the opening of the lens, which would produce unwanted interference.

Um eine optimale, möglichst homogene Ausleuchtung der Streuscheibe bzw. ein möglichst homogenes Erscheinungsbild der Streuscheibe und somit des Lichtmoduls zu erreichen, ist außerdem vorgesehen, dass die LED-Lichtquellen 6, 7; 6', 7' der Sekundär-Lichtquelle entgegen der Lichtaustrittsrichtung, in Bezug auf die Primär-Lichtquelle 8, 9 nach hinten versetzt angeordnet ist. Mit zunehmender Entfernung der LED-Lichtquelle(n) der Sekundär-Lichtquelle wird eine homogenere Ausleuchtung der Streuscheibe erreicht.In order to achieve an optimal, homogeneous illumination of the lens or homogeneous as possible appearance of the lens and thus the light module is also provided that the LED light sources 6, 7; 6 ', 7' of the secondary light source opposite to the light exit direction, with respect to the primary light source 8, 9 is arranged offset to the rear. With increasing distance of the LED light source (s) of the secondary light source, a more homogeneous illumination of the lens is achieved.

Entsprechend weist der Kühlkörper 4 eine vordere Ebene auf, an welcher die Primär-LED-Lichtquelle 8, 9 angebracht ist und eine weitere, zurückgesetzte Ebene für die Sekundär-LED-Lichtquellen 6, 7; 6', 7'. Bei der gezeigten Variante ist nur eine solche Ebene für die Sekundär-LED-Lichtquellen vorgesehen, grundsätzlich können aber auch zwei oder mehr solcher Ebenen vorgesehen sein.Accordingly, the heat sink 4 has a front plane to which the primary LED light source 8, 9 is mounted and another, recessed plane for the secondary LED light sources 6, 7; 6 ', 7'. In the variant shown, only one such plane is provided for the secondary LED light sources, but in principle two or more such planes may also be provided.

Von der Ebene für die Sekundär-LED-Lichtquellen steht quasi ein Dom ab, auf welchem sich die Ebene für die Primär-LED-Lichtquelle befindet. Dieser Dom beeinflusst natürlich auch das von den Sekundär-LED-Lichtquellen abgestrahlte Licht, wie dies weiter unten noch besprochen wird.From the level for the secondary LED light sources there is a quasi dome on which the plane for the primary LED light source is located. Of course, this dome also affects the light emitted by the secondary LED light sources, as discussed below.

Die LED-Lichtquelle 8, 9 der Primär-Lichtquelle und die LED-Lichtquellen 6, 7; 6', 7' der Sekundär-Lichtquelle sind getrennt ansteuerbar, sodass die Primär-Lichtquelle und die Sekundär-Lichtquelle unabhängig voneinander ein- und ausgeschaltet werden können.The LED light source 8, 9 of the primary light source and the LED light sources 6, 7; 6 ', 7' of the secondary light source can be controlled separately, so that the primary light source and the secondary light source can be switched on and off independently of each other.

In eingebautem Zustand des Lichtmoduls in einen Fahrzeugscheinwerfer weist die Sekundär-Lichtquelle des Lichtmoduls in vertikaler Richtung unterhalb einer Horizontalebene 101 durch die LED-Lichtquelle der Primär-Lichtquelle n LED-Lichtquellen 6', 7' und oberhalb der Horizontalebene m LED-Lichtquellen 6, 7 auf, wobei m < n gilt.In the installed state of the light module in a vehicle headlight, the secondary light source of the light module in the vertical direction below a horizontal plane 101 by the LED light source of the primary light source n LED light sources 6 ', 7' and above the horizontal plane m LED light sources 6, 7, where m <n.

Dies ist in Figur 2 zu erkennen, wo n = 3 und m = 1 gilt, sowie weiters in Figur 2, mit m = 0 und n= 3.This is in FIG. 2 to recognize where n = 3 and m = 1, and further in FIG. 2 , with m = 0 and n = 3.

Die LED-Lichtquelle(n) oberhalb bzw. unterhalb der Horizontalebene 101 ist/sind jeweils symmetrisch in horizontaler Richtung in Bezug auf eine Vertikalebene durch die optische Achse 100 angeordnet.The LED light source (s) above and below the horizontal plane 101 are each arranged symmetrically in the horizontal direction with respect to a vertical plane through the optical axis 100.

Außerdem sind noch seitlich neben der LED-Lichtquelle 8, 9 der Primär-Lichtquelle weitere LED-Lichtquellen 6', 7' der Sekundär-Lichtquelle angeordnet, nämlich bei dem konkreten Beispiel in Figur 2 bzw. Figur 3 jeweils eine zu jeder Seite.In addition, further LED light sources 6 ', 7' of the secondary light source are arranged laterally next to the LED light source 8, 9 of the primary light source, namely in the concrete example in FIG FIG. 2 respectively. FIG. 3 one to each side.

Um den Lichtstrom von der LED-Lichtquelle 8, 9 der Primär-Lichtquelle optimal nutzen zu können, ist vorgesehen, dass die Abmessungen der Öffnung 10 in der Streuscheibe 3, wie etwa Durchmesser, Seitenabmessungen, etc., und der Abstand der LED-Lichtquelle 8, 9 der Primär-Lichtquelle zu der Streuscheibe 3 derart gewählt sind, dass von der LED-Lichtquelle 8, 9, welche die Primär-Lichtquelle bildet, alle emittierten Lichtstrahlen, welche innerhalb eines Öffnungswinkels der Linse 2 liegen, durch die Öffnung 10 durchtreten können. Die von der Primär-LED-Lichtquelle emittierten Strahlen, welche den Öffnungswinkel der Linse gerade erreichen, welche also von der Öffnung 10 gerade noch durchgelassen werden, sind mit S1 bezeichnet (Figur 1).In order to optimally use the luminous flux from the LED light source 8, 9 of the primary light source, it is provided that the dimensions of the opening 10 in the lens 3, such as diameter, side dimensions, etc., and the distance of the LED light source 8, 9 of the primary light source are selected to the lens 3 such that of the LED light source 8, 9, which forms the primary light source, all emitted light rays, which are within an opening angle of the lens 2, pass through the opening 10 can. The rays emitted by the primary LED light source, which just reach the aperture angle of the lens, ie which are just left through by the aperture 10, are denoted by S1 ( FIG. 1 ).

Die Größe der Öffnung in der Streuscheibe ist abhängig von der Entfernung der Scheibe zu der LED-Lichtquelle der Primär-Lichtquelle und lässt sich aus dem Öffnungswinkel der Linse ableiten. Da die Öffnung der Streuscheibe direkt über die Linse abgebildet wird, ist es von Vorteil, diese Öffnung so klein wie möglich auszuführen. Außerdem ist vorzugsweise die Form der Öffnung an die Form des Linsenbeschnittes angepasst.The size of the opening in the lens is dependent on the distance of the disc to the LED light source of the primary light source and can be derived from the opening angle of the lens. Since the aperture of the lens is imaged directly over the lens, it is advantageous to make this aperture as small as possible. In addition, the shape of the opening is preferably adapted to the shape of the lens trimming.

Um die Größe der Öffnung zu minimieren, wird die Streuscheibe möglichst nahe an der LED-Lichtquelle der Primär-Lichtquelle positioniert.To minimize the size of the aperture, the lens is positioned as close as possible to the LED light source of the primary light source.

Die Form der Streuscheibe ist vorzugsweise derart ausgeführt, dass sie durch die Projektionslinse hindurch, von Außen betrachtet, aus sämtlichen Betrachtungswinkeln sichtbar ist, sodass sich ein homogen wirkendes Erscheinungsbild der Linse erzeugen lässt.The shape of the lens is preferably designed so that it is visible through the projection lens, viewed from the outside, from all viewing angles, so that a homogeneous appearance of the lens can be generated.

Außerdem ist noch vorgesehen, dass die Abmessungen der Öffnung 10 in der Streuscheibe 3, wie etwa Durchmesser, Seitenabmessungen, etc. und/oder die Anordnung der LED-Lichtquellen 6, 7; 6', 7' der Sekundär-Lichtquelle in Bezug auf die Öffnung 10 der Streuscheibe 3 und/oder der Abstand der LED-Lichtquellen 6, 7; 6', 7' der Sekundär-Lichtquelle zu der Streuscheibe 3 derart gewählt sind, dass von den LED-Lichtquellen 6, 7; 6', 7', welche die Sekundär-Lichtquelle bilden, Lichtstrahlen lediglich in Bereiche der Streuscheibe 3, welche keine Öffnung 10 aufweisen, emittiert werden.In addition, it is provided that the dimensions of the opening 10 in the lens 3, such as diameter, side dimensions, etc. and / or the arrangement of the LED light sources 6, 7; 6 ', 7' of the secondary light source with respect to the opening 10 of the lens 3 and / or the distance of the LED light sources 6, 7; 6 ', 7' of the secondary light source are selected to the lens 3 such that of the LED light sources 6, 7; 6 ', 7', which form the secondary light source, light beams only in areas of the lens 3, which have no opening 10, are emitted.

Auf diese Weise kann kein Durchtritt von Sekundär-Licht durch die Öffnung der Streuscheibe stattfinden, was unerwünschte Effekte bewirken würde.In this way, no passage of secondary light through the opening of the lens can take place, which would cause undesirable effects.

Wie in Figur 1 gezeigt ist es besonders zweckmäßig, wenn die Abmessungen der Öffnung 10 in der Streuscheibe 3, wie etwa Durchmesser, Seitenabmessungen, etc. und/oder die Anordnung der LED-Lichtquellen 6, 7; 6', 7' der Sekundär-Lichtquelle in Bezug auf die Öffnung 10 der Streuscheibe 3 und/oder der Abstand der LED-Lichtquellen 6, 7; 6', 7' der Sekundär-Lichtquelle zu der Streuscheibe 3 derart gewählt sind, dass von den LED-Lichtquellen 6, 7; 6', 7', welche die Sekundär-Lichtquelle bilden, Lichtstrahlen bis an den Rand der Öffnung 10 der Streuscheibe 3 abgestrahlt werden.As in FIG. 1 it is particularly useful if the dimensions of the opening 10 in the lens 3, such as diameter, side dimensions, etc. and / or the arrangement of the LED light sources 6, 7; 6 ', 7' of the secondary light source with respect to the opening 10 of the lens 3 and / or the distance of the LED light sources 6, 7; 6 ', 7' of the secondary light source are selected to the lens 3 such that of the LED light sources 6, 7; 6 ', 7', which form the secondary light source, light rays are emitted to the edge of the opening 10 of the lens 3.

Figur 1 zeigt dabei jene Strahlen S2 der Sekundär-LED-Lichtquellen 6, 7; 6', 7', welche gerade noch den Rand der Öffnung 10 erreichen, Strahlen welche unter einem noch größeren Winkel abgestrahlt werden und durch die Öffnung 10 austreten könnten, werden bereits durch den Kühlkörper, d.h. durch den Dom, auf welchem die Primär-Lichtquelle sitzt, je nach Oberflächenbeschaffenheit des Kühlkörpers bzw. seines Domes absorbiert bzw. (diffus) reflektiert. FIG. 1 shows those rays S2 of the secondary LED light sources 6, 7; 6 ', 7', which just reach the edge of the opening 10, rays which are radiated at an even greater angle and could escape through the opening 10 are already through the heat sink, ie through the dome, on which the primary light source sits, depending on the surface texture of the heat sink or its dome absorbed or (diffused) reflected.

Der Abstand der Sekundär-LED-Lichtquellen zum Dom des Kühlkörpers 4 muss im direkten Verhältnis zum Abstand der Sekundär-LED-Lichtquellen zu der Streuscheibe stehen, da ansonsten zu große Abschattungseffekte durch den Dom auftreten. Geringfügige Abschattung durch den Dom kann durch den Lichtleitereffekt in der Streuscheibe kompensiert werden.The distance between the secondary LED light sources to the dome of the heat sink 4 must be in direct proportion to the distance of the secondary LED light sources to the lens, otherwise too large shading effects occur through the dome. Slight shading by the dome can be compensated by the light guide effect in the lens.

Die Abstimmung, wie die Sekundär-LED-Lichtquellen 6, 7; 6', 7' auf dem Kühlkörper anzuordnen sind, um einerseits eine maximale und gleichmäßige Ausleuchtung der Streuscheibe 3 zu erreichen, ohne dass Licht durch die Öffnung 10 gelangt, hängt natürlich auch von der Geometrie des Kühlkörpers 4 ab.The tuning, such as the secondary LED light sources 6, 7; 6 ', 7' are to be arranged on the heat sink, on the one hand to achieve a maximum and uniform illumination of the lens 3 without light passes through the opening 10, of course, also depends on the geometry of the heat sink 4.

Die gleichmäßige Beleuchtung der Streuscheibe wird im Wesentlichen durch 3 Parameter definiert: Abstand der Sekundär-LED-Lichtquelle(n) zur Streuscheibe, Anzahl der Lichtquellen und Anordnung der Lichtquelle um die optische Achse der Linse, vorzugsweise in einer oder mehreren Ebenen hinter der Scheibe, um den notwendigen Abstand der Sekundär-LED-Lichtquellen zu der Streuscheibe zu erreichen.The uniform illumination of the lens is essentially defined by 3 parameters: distance of the secondary LED light source (s) to the lens, number of light sources and arrangement of the light source about the optical axis of the lens, preferably in one or more planes behind the lens, to achieve the necessary distance of the secondary LED light sources to the lens.

Generell gilt, die Homogenität der Linse ist direktproportional zur Anzahl der Sekundär-LED-Lichtquellen und dem Abstand der Sekundär-LED-Lichtquellen zu der Streuscheibe, wobei eine gleichmäßige Verteilung der Sekundär-LED-Lichtquellen vorteilhaft ist.In general, the homogeneity of the lens is directly proportional to the number of secondary LED light sources and the distance of the secondary LED light sources to the lens, wherein a uniform distribution of the secondary LED light sources is advantageous.

Limitierend wirkt auf diese Parameter der für das Lichtmodul vorhandene Bauraum. Daraus ergeben sich bestimmte optimierte Varianten, wie etwa die in Figur 1 abgestufte Anordnung der LED-Lichtquellen.The limiting factor for these parameters is the space available for the light module. This results in certain optimized variants, such as those in FIG. 1 graduated arrangement of LED light sources.

Die Sekundär-LED-Lichtquellen könnten auch in einer Ebene mit der Primär-LED-Lichtquelle positioniert sein. Dadurch kann auch mit einer geringen LED Anzahl ein homogener Leuchteindruck realisiert werden. In diesem Fall sollte aber die Streuscheibe nach vorne gekrümmt sein bzw. schräg nach vorne verlaufen.The secondary LED light sources could also be positioned in a plane with the primary LED light source. As a result, a homogeneous luminous impression can be realized even with a small number of LEDs. In this case, however, the lens should be curved forward or obliquely forward.

Claims (15)

LED-Lichtmodul (1) für ein Kraftfahrzeug bzw. für einen Scheinwerfer für ein Kraftfahrzeug, wobei das Lichtmodul (1) eine Linse (2) und eine LED-Lichtquelle (8, 9) umfasst,
dadurch gekennzeichnet, dass
in Lichtaustrittsrichtung gesehen zwischen der LED-Lichtquelle (8, 9) und der Linse (2) eine Streuscheibe (3) angeordnet ist, wobei die Streuscheibe (3) zumindest eine Öffnung (10) zum direkten Durchtritt von zumindest einem Anteil des von der LED-Lichtquelle (8, 9) emittierten Lichtes aufweist, und wobei der durch die Öffnung (10) der Streuscheibe (3) austretende Direktanteil des von der LED-Lichtquelle emittierten Lichtes über die Linse (2) zur Erzeugung einer Lichtfunktion in den Bereich vor dem Kraftfahrzeug projiziert wird.LED light module (1) for a motor vehicle or for a headlight for a motor vehicle, wherein the light module (1) comprises a lens (2) and an LED light source (8, 9),
characterized in that
Seen in the light exit direction between the LED light source (8, 9) and the lens (2) a lens (3) is arranged, wherein the lens (3) at least one opening (10) for the direct passage of at least a portion of the LED Light source (8, 9) emitted light, and wherein the through the opening (10) of the lens (3) emerging direct component of the light emitted from the LED light source via the lens (2) for generating a light function in the area before Motor vehicle is projected. LED-Lichtmodul nach Anspruch 1, dadurch gekennzeichnet, dass die LED-Lichtquelle (8, 9) als Primär-Lichtquelle ausgebildet ist, deren im Wesentlichen gesamter emittierter, relevanter Lichtstrom durch die Öffnung (10) der Streuscheibe (3) zur Erzeugung der Lichtfunktion austritt.LED light module according to claim 1, characterized in that the LED light source (8, 9) is designed as a primary light source whose substantially total emitted, relevant luminous flux through the opening (10) of the lens (3) for generating the light function exit. LED-Lichtmodul nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass zumindest eine weitere LED-Lichtquelle (6, 7; 6', 7') als Sekundärlichtquelle vorgesehen ist, welche in Bezug auf die Öffnung (10) der Streuscheibe (3) derart angeordnet ist, dass das von der Sekundärlichtquelle emittierte Licht im Wesentlichen auf die Streuscheibe (3) emittiert wird, derart dass im Wesentlichen kein Lichtstrom der Sekundärlichtquelle durch die Öffnung (10) der Streuscheibe (3) austritt.LED light module according to claim 1 or 2, characterized in that at least one further LED light source (6, 7; 6 ', 7') is provided as a secondary light source, which with respect to the opening (10) of the lens (3) arranged that the light emitted from the secondary light source is substantially emitted to the lens (3), so that substantially no luminous flux of the secondary light source through the opening (10) of the lens (3) emerges. LED-Lichtmodul nach Anspruch 3, dadurch gekennzeichnet, dass eine Achse durch die LED-Lichtquelle (8, 9) der Primär-Lichtquelle und die Öffnung (10) der Streuscheibe (3) die optische Achse (100) bildet und dass die zumindest eine LED-Lichtquelle (6, 7; 6', 7') der Sekundärlichtquelle außerhalb der optischen Achse (100) liegt.LED light module according to claim 3, characterized in that an axis through the LED light source (8, 9) of the primary light source and the opening (10) of the lens (3) forms the optical axis (100) and that the at least one LED light source (6, 7; 6 ', 7') of the secondary light source is outside the optical axis (100). LED-Lichtmodul nach Anspruch 3 oder 4, dadurch gekennzeichnet, dass die zumindest eine LED-Lichtquelle (6, 7; 6', 7') der Sekundär-Lichtquelle entgegen der Lichtaustrittsrichtung, in Bezug auf die Primär-Lichtquelle nach hinten versetzt angeordnet ist.LED light module according to claim 3 or 4, characterized in that the at least one LED light source (6, 7; 6 ', 7') of the secondary light source opposite to the light exit direction, with respect to the primary light source is arranged offset to the rear , LED-Lichtmodul nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, dass die Sekundär-Lichtquelle zwei oder mehrere LED-Lichtquellen umfasst.LED light module according to one of claims 3 to 5, characterized in that the secondary light source comprises two or more LED light sources. LED-Lichtmodul nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, dass die LED-Lichtquelle (8, 9) der Primär-Lichtquelle und die zumindest eine LED-Lichtquelle (6, 7; 6', 7') der Sekundär-Lichtquelle getrennt ansteuerbar sind.LED light module according to one of claims 3 to 6, characterized in that the LED light source (8, 9) of the primary light source and the at least one LED light source (6, 7; 6 ', 7') of the secondary light source are controlled separately. LED-Lichtmodul nach einem der Ansprüche 3 bis 7, dadurch gekennzeichnet, dass - in eingebautem Zustand des Lichtmoduls in einen Fahrzeugscheinwerfer - die Sekundär-Lichtquelle des Lichtmoduls in vertikaler Richtung unterhalb einer Horizontalebene, welche beispielsweise durch die LED-Lichtquelle der Primär-Lichtquelle verläuft, n LED-Lichtquellen (6', 7') und oberhalb der Horizontalebene m LED-Lichtquellen (6, 7) aufweist, wobei m < n gilt.LED light module according to one of claims 3 to 7, characterized in that - in the installed state of the light module in a vehicle headlight - the secondary light source of the light module in the vertical direction below a horizontal plane, which extends for example by the LED light source of the primary light source , n LED light sources (6 ', 7') and above the horizontal plane m LED light sources (6, 7), where m <n holds. LED-Lichtmodul nach Anspruch 8, gekennzeichnet durch m = 0.LED light module according to claim 8, characterized by m = 0. LED-Lichtmodul nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass die LED-Lichtquelle(n) oberhalb bzw. unterhalb der Horizontalebene jeweils symmetrisch in horizontaler Richtung in Bezug auf eine Vertikalebene durch die optische Achse (100) angeordnet ist/sind.LED light module according to claim 8 or 9, characterized in that the LED light source (s) above or below the horizontal plane is in each case arranged symmetrically in the horizontal direction with respect to a vertical plane through the optical axis (100) / are. LED-Lichtmodul nach einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, dass seitlich neben der LED-Lichtquelle (8, 9) der Primär-Lichtquelle weitere LED-Lichtquellen (6', 7') der Sekundär-Lichtquelle angeordnet sind.LED light module according to one of claims 8 to 10, characterized in that laterally next to the LED light source (8, 9) of the primary light source further LED light sources (6 ', 7') of the secondary light source are arranged. Lichtmodul nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass die Abmessungen der Öffnung (10) in der Streuscheibe (3), wie etwa Durchmesser, Seitenabmessungen, etc. und/oder die Anordnung der LED-Lichtquelle (8, 9) der Primär-Lichtquelle in Bezug auf die Öffnung (10) der Streuscheibe (3) und/oder der Abstand der LED-Lichtquelle (8, 9) der Primär-Lichtquelle zu der Streuscheibe (3) derart gewählt sind, dass von der LED-Lichtquelle (8, 9), welche die Primär-Lichtquelle bildet, alle emittierten Lichtstrahlen, welche innerhalb eines Öffnungswinkels der Linse (2) liegen, durch die Öffnung (10) durchtreten können.Light module according to one of claims 1 to 11, characterized in that the dimensions of the opening (10) in the lens (3), such as diameter, side dimensions, etc. and / or the arrangement of the LED light source (8, 9) of Primary light source with respect to the opening (10) of the lens (3) and / or the distance of the LED light source (8, 9) of the primary light source to the lens (3) are selected such that of the LED light source (8, 9), which forms the primary light source, all emitted light rays which are within an opening angle of the lens (2) can pass through the opening (10). Lichtmodul nach einem der Ansprüche 3 bis 13, dadurch gekennzeichnet, dass die Abmessungen der Öffnung (10) in der Streuscheibe (3), wie etwa Durchmesser, Seitenabmessungen, etc. und/oder die Anordnung der zumindest einen LED-Lichtquelle (6, 7; 6', 7') der Sekundär-Lichtquelle in Bezug auf die Öffnung (10) der Streuscheibe (3) und/oder der Abstand der zumindest einen LED-Lichtquelle (6, 7; 6', 7') der Sekundär-Lichtquelle zu der Streuscheibe (3) derart gewählt sind, dass von der zumindest einen LED-Lichtquelle (6, 7; 6', 7'), welche die Sekundär-Lichtquelle bildet, Lichtstrahlen lediglich in Bereiche der Streuscheibe (3), welche keine Öffnung (10) aufweisen, emittiert werden.Light module according to one of claims 3 to 13, characterized in that the dimensions of the opening (10) in the lens (3), such as diameter, side dimensions, etc. and / or the arrangement of the at least one LED light source (6, 7 6 ', 7') of the secondary light source with respect to the opening (10) of the lens (3) and / or the distance of the at least one LED light source (6,7; 6 ', 7') of the secondary light source to the lens (3) are selected such that of the at least one LED light source (6, 7; 6 ', 7'), which forms the secondary light source, light rays only in areas of the lens (3), which no opening (10) are emitted. Lichtmodul nach Anspruch 13, dadurch gekennzeichnet, dass die Abmessungen der Öffnung (10) in der Streuscheibe (3), wie etwa Durchmesser, Seitenabmessungen, etc. und/oder die Anordnung der zumindest einen LED-Lichtquelle (6, 7; 6', 7') der Sekundär-Lichtquelle in Bezug auf die Öffnung (10) der Streuscheibe (3) und/oder der Abstand der zumindest einen LED-Lichtquelle (6, 7; 6', 7') der Sekundär-Lichtquelle zu der Streuscheibe (3) derart gewählt sind, dass von der zumindest einen LED-Lichtquelle (6, 7; 6', 7'), welche die Sekundär-Lichtquelle bildet, Lichtstrahlen bis an den Rand der Öffnung (10) der Streuscheibe (3) abgestrahlt werden.Light module according to claim 13, characterized in that the dimensions of the opening (10) in the lens (3), such as diameter, side dimensions, etc. and / or the arrangement of the at least one LED light source (6, 7, 6 ', 7 ') of the secondary light source with respect to the opening (10) of the lens (3) and / or the distance of the at least one LED light source (6, 7; 6', 7 ') of the secondary light source to the lens ( 3) are selected such that from the at least one LED light source (6, 7, 6 ', 7'), which forms the secondary light source, light rays are emitted to the edge of the opening (10) of the lens (3) , Lichtmodul nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, dass die LED-Lichtquelle (8, 9) der Primär-Lichtquelle eine Infrarot-Lichtquelle ist.Light module according to one of claims 1 to 14, characterized in that the LED light source (8, 9) of the primary light source is an infrared light source.
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US8936381B2 (en) 2015-01-20
CN102287734B (en) 2014-02-26
US20110280031A1 (en) 2011-11-17
CN102287734A (en) 2011-12-21
EP2386792B1 (en) 2013-09-11

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