EP2693106B1 - Light module - Google Patents

Light module Download PDF

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Publication number
EP2693106B1
EP2693106B1 EP13172375.1A EP13172375A EP2693106B1 EP 2693106 B1 EP2693106 B1 EP 2693106B1 EP 13172375 A EP13172375 A EP 13172375A EP 2693106 B1 EP2693106 B1 EP 2693106B1
Authority
EP
European Patent Office
Prior art keywords
light
light module
unit
optical unit
securing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP13172375.1A
Other languages
German (de)
French (fr)
Other versions
EP2693106A3 (en
EP2693106A2 (en
Inventor
Stephan Braun
Friedrich Schauwecker
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.)
Marelli Automotive Lighting Reutlingen Germany GmbH
Original Assignee
Automotive Lighting Reutlingen 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 Automotive Lighting Reutlingen GmbH filed Critical Automotive Lighting Reutlingen GmbH
Publication of EP2693106A2 publication Critical patent/EP2693106A2/en
Publication of EP2693106A3 publication Critical patent/EP2693106A3/en
Application granted granted Critical
Publication of EP2693106B1 publication Critical patent/EP2693106B1/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
    • F21S41/60—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
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/29—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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/29—Attachment thereof
    • F21S41/295—Attachment thereof specially adapted to projection lenses
    • 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
    • F21S41/50—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers
    • 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
    • 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
    • F21S45/42—Forced cooling
    • F21S45/43—Forced cooling using gas

Definitions

  • the invention relates to a light module, as can be used in particular in motor vehicle headlights.
  • a light module is understood to mean the actual light-emitting unit of a headlight, which emits the desired radiation distribution.
  • the light distribution should have certain, usually legally prescribed, characteristic intensity profiles.
  • dimmed light distributions are to be provided, for example as low beam or fog light.
  • a dimmed light distribution is characterized by a light-dark boundary that runs essentially horizontally in sections.
  • a section of the cut-off line that faces oncoming traffic runs vertically lower than a section of the cut-off line that faces away from oncoming traffic.
  • a sloping section of the cut-off line is a sloping section of the cut-off line.
  • a high beam light distribution should often be generated. This usually consists of a comparatively narrow illuminated area above the cut-off line (spot light distribution) and a basic light distribution for uniform illumination below the cut-off line.
  • a further development is to provide a so-called partial high beam.
  • a selected area of the emitted light distribution is specifically darkened. This prevents dangerous oncoming traffic from being dazzled.
  • specific areas it is also conceivable for specific areas to be brightly illuminated in order to draw the driver's attention to these areas.
  • Corresponding configurations are also advantageous for the dimmed light distribution (so-called partial low beam).
  • the required darkening of certain areas of the emitted light distribution is preferably carried out automatically in conjunction with suitable sensors for detecting oncoming traffic or other objects. This enables a dynamic partial high beam or a "glare-free high beam" or a dynamic low beam to be implemented.
  • Light modules which have the following basic structure: A matrix-like arrangement of semiconductor light sources and a primary optics with matrix-like arranged light guide elements, each having a light entry surface and a light exit surface.
  • a light entry surface is assigned to a semiconductor light source.
  • the light exit surfaces are also arranged in a matrix and form a primary optics exit surface.
  • the light modules described also have secondary optics, which is set up to image or project the light distribution which arises on the primary optics exit surface in order to achieve a desired emission light distribution on an apron located in front of the headlight or in front of the light module.
  • a partial high beam or a partial low beam can be realized by specifically switching off individual ones of the semiconductor light sources, the other semiconductor light sources continuing to emit light.
  • the light entry surface of a light guide element of the primary optics should be positioned as close as possible to the light emission surface of the associated semiconductor light source.
  • the light emission surfaces and the light entry surfaces should be aligned with one another in such a way that the largest possible proportion of the emitted light can be coupled into the primary optics through the light entry surface. If the distance between the light emission surface and the light entry surface is too large or the positioning is inaccurate, part of the light emitted by the semiconductor light source is not used for the distribution of the light emission and the efficiency of the light module is reduced.
  • the light distribution that can be emitted by the light module is also influenced by the light distribution that arises on the primary optics exit surface and that is projected via the secondary optics. Also the light distribution on the primary optics exit surface can depend sensitively on the positioning of the light entry surfaces relative to the semiconductor light sources.
  • the secondary optics should be positioned precisely relative to the primary optics exit surface. Otherwise, due to the dispersion properties of the secondary optics (usually designed as a converging lens), undesired color edges (color fringes) can appear in the emitted light distribution.
  • the light modules are installed in motor vehicle headlights, then the light modules must also be adjusted in the respective headlight housing and in relation to any other optical elements of the headlight. Furthermore, a light module of a motor vehicle headlight generally has to be aligned with respect to the light modules in other headlights of the same motor vehicle. In this respect, the alignment of the light module in the headlight can be problematic.
  • An LED light source system with the features of the preamble of claim 1 is in the EP 1 925 876 A1 described.
  • the object of the invention is to provide a light module which can be manufactured with great precision with respect to the alignment of the optically functional parts with respect to one another and is flexible can be used in different headlights.
  • the calibration required during the manufacture of the light module is to be simplified.
  • the solution idea according to the invention is to provide a modular structure of preassembled units for the light module. These only have to be put together for final assembly of the light module. The necessary adjustments and calibrations can advantageously be carried out when the preassembled structural units are assembled.
  • the light source unit, the primary optics unit and the secondary optics unit are each designed as preassembled units which are assembled for the final assembly of the light module.
  • the final assembly is made possible by the fact that a first fastening device is provided for fastening the primary optics unit to the light source unit in a positionally accurate manner.
  • a second fastening device is provided, which is designed to fasten the secondary optics unit in the correct position with respect to the primary optics unit.
  • the second fastening device comprises a holding frame, which is set up for arrangement between the primary optics unit and the secondary optics unit, the primary optics unit being accommodated between the holding frame and the light source unit.
  • the holding frame has a housing fastening section for fastening the light module in a headlight housing.
  • the attachment is carried out in a precise position insofar as attachment is possible at a location relative to the reference object that can be predetermined to a certain extent with respect to all three spatial directions.
  • the construction according to the invention from preassembled units has the advantage that each of the units can be tested for their function. This enables quality control already during the manufacture of the individual building units.
  • the critical alignment of the individual units can be carried out easily during final assembly.
  • the units can be aligned, adjusted and calibrated and fastened to each other step by step.
  • the primary optics unit can be assembled with the light source unit in such a precise position that the light entry surfaces are precisely assigned to the respective semiconductor light sources. This is particularly advantageous if the primary optics unit has a matrix-like arrangement of light entry surfaces, which are each to be individually assigned to the semiconductor light sources, which are likewise arranged in a matrix.
  • the function of the subunit composed of the light source unit and the primary optics unit can then be tested.
  • the light distribution that arises on the light exit surfaces decisively influences the light distribution emitted by the light module. It can be checked whether the assignment of the optical elements to the respective semiconductor light sources meets the requirements, e.g. whether sufficient light is coupled into each optical element.
  • an electrical calibration of the radiation powers of the individual semiconductor light sources can be carried out taking into account the effect of the assigned optical elements.
  • the secondary optics unit can be added to set up the light module.
  • the second fastening device allows the lens device to be positioned precisely in relation to the light-emitting surfaces of the primary optics unit. The described dispersion effects can be minimized by this calibration. Overall, the light module according to the invention enables an inexpensive and simple final assembly process.
  • the structural units are designed such that they are joined together along an assembly direction, e.g. pushed together or put together and can be attached to each other.
  • the various structural units are preferably connected to one another in the order in which they functionally function along the light path.
  • the primary optics unit is first joined together with the light source unit along the mounting direction.
  • a holding frame is then preferably slid and connected to this combination assembly along the mounting direction.
  • the secondary optics unit is pushed onto the respective combination assembly (depending on the embodiment with or without the holding frame) and assembled along the direction of assembly.
  • the light module constructed according to the invention can be installed as a unit in a headlight.
  • the sensitive calibration between the light source unit and the primary optics unit and between the primary optics unit and the secondary optics unit is retained.
  • the light distribution is understood to mean that light distribution which is generated by the lens device of the secondary optics unit from the light distribution which arises on the light exit surfaces of the primary optics unit.
  • the radiation light distribution then serves to illuminate the apron located in front of the light module or in front of the headlight. This defines a main emission direction for the light module.
  • the first fastening device preferably comprises a fastening section of the light source unit on the one hand and an associated fastening section of the primary optics unit on the other hand.
  • the first fastening device does not necessarily represent a separate component, but is formed by the two fastening sections mentioned.
  • the fastening sections are designed to match one another, for example in such a way that they can engage in one another for fastening.
  • the fastening section of the light source unit has a projecting section, for example a fastening pin.
  • the fastening section of the primary optics unit then has an associated recess in which the projecting section can be received (e.g. in the manner of a socket).
  • the holding frame preferably has a first fitting section for connection to the primary optics unit, and a second fitting section for fastening the secondary optics unit in a positionally accurate manner with respect to the primary optics unit.
  • the light module then has four functional ones Main components: the light source unit, the primary optics unit, the holding frame and the secondary optics unit. These can simply be put together for final assembly.
  • the first fitting section of the holding frame can have connecting elements for fastening the primary optics unit.
  • the primary optics are not directly attached to the holding frame, that is to say that the first fitting section has no connecting elements for directly attaching the primary optics unit. Then the primary optics are connected to the holding frame in particular via the light source unit.
  • the primary optics unit is preferably received without means for directly attaching (e.g. screwing) the primary optics to the holding frame between the holding frame and the light source unit.
  • the holding frame can be designed so that it is adapted to the light source unit in such a way that an assembly space is formed during assembly, in which the primary optics unit can be accommodated with a precise fit.
  • the light source unit is in particular from behind, that is from the direction opposite to the light emission direction of the light module, with the Retaining frame detachably screwed. This makes it possible to replace the light source unit in the light module, for example for maintenance purposes.
  • the first fitting section is designed in the manner of a recess in the holding frame, into which an associated section of the primary optics unit or a partial housing enclosing the primary optics unit can be received as a whole.
  • the second fitting section comprises, in particular, fastening means for precise fastening and / or for adjusting the position of the secondary optics unit. These fastening means are preferably designed such that a releasable and re-attachable connection to the secondary optics unit is possible.
  • the holding frame also serves as an interface between the light module and a headlight housing of a headlight, in which the light module is to be installed.
  • the holding frame has a housing fastening section for fastening the light module in the headlight housing.
  • the holding frame has a bearing section (for example a spherical section), via which the light module can be mounted in a headlight housing.
  • the holding frame can have one or more alignment sections, via which the orientation of the light module in the headlight housing can be changed in that the light module can be tilted and / or displaced by exerting force on the alignment section.
  • the holding frame has a projection with a through opening for receiving a guide rod, by means of which the light module can be aligned.
  • the second fastening device is preferably designed such that the secondary optics unit is detachably and reattachably arranged. This makes it possible to loosen the secondary optics unit for adjustment and to reattach it and thus achieve a positionally accurate alignment of the lens device.
  • the light source unit comprises a plurality of LED chips, each with a light emission surface, the light emission surfaces of the LED chips being arranged in a matrix-like manner with respect to one another.
  • the light source unit can also have a plurality of LEDs which are positioned in a desired (e.g. also irregular) arrangement on a printed circuit board.
  • the circuit board can form a front of the light source unit. When assembled, this front side faces the primary optics unit.
  • a heat sink for dissipating heat can be arranged on that side of the circuit board which is oriented away from the primary optics unit in the assembled state of the light module.
  • the heat sink is preferably thermally connected to the circuit board, for example glued with thermally conductive adhesives.
  • a ventilation device can be provided on the side of the printed circuit board facing away from the primary optics unit for the air to flow against the heat sink.
  • the light source unit comprises a control device by means of which the semiconductor light sources are independent are controllable from each other to emit light.
  • the control device can, in particular, switch individual semiconductor light sources on or off independently of one another.
  • a variable partial high beam or a glare-free high beam as described at the beginning, can be provided with a single, self-contained light module. It is also conceivable that the control device can change the emitted intensities of the individual semiconductor light sources independently of one another.
  • the control device is preferably also arranged on the circuit board of the light source unit.
  • the light source unit therefore represents a complex structural unit, which can include all electronically functional components of the light module.
  • the optical elements are provided by a coherent primary optics element which has a multiplicity of light-guiding sections which can each be assigned to a semiconductor light source, each of the light-guiding sections having a light entry surface.
  • a light guide section with its light entry surface is then assigned to a semiconductor light source (or the associated light emission surface).
  • the light guide sections and / or the light entry surfaces are in particular arranged in a matrix, preferably in accordance with the arrangement of the semiconductor light source.
  • the light exit surfaces are preferably matrix-like arranged and in particular form a common primary optics exit surface.
  • the primary optics unit can furthermore have guide means for holding and / or positioning the individual light guide sections of the primary optics element.
  • the primary optics unit is a complex structural unit which combines all the optically functional features of the primary optics and enables precise adjustment, in particular with respect to the light source unit.
  • the secondary optics unit can have a fitting section for its precise fitting (for example on the associated fitting section of the holding frame) and a decorative element surrounding the lens device at least in sections.
  • This decorative element is designed and arranged such that it is visible when the light module is assembled when looking at the secondary optics unit.
  • the decorative element is at least partially visible when the light module is installed in a headlight. This enables an attractive design to be achieved. It is not necessary to design the lens holder of the secondary optics unit as a design part.
  • the decorative element can be changed without changing the structure of the light module. Therefore, the light module can be used in different headlights with different designs and an appealing look can be achieved with an adapted decorative element.
  • the fitting section of the secondary optics unit is preferably arranged on or provided by the lens holder.
  • the fitting section is designed in such a way that it can fit snugly against said second fitting section of the holding frame.
  • the lens holder is designed, for example, in the manner of a hollow body open on both sides, one of the openings of the hollow body being closed by the lens device and the fitting section of the secondary optics unit being provided in the region of the other opening.
  • the fitting section of the secondary optics unit thus contributes to the second fastening device.
  • the fitting sections of the secondary optics unit and the holding frame are preferably designed to be matched to one another, so that they engage in one another for fastening the secondary optics unit.
  • the lens holder has on its fitting section a projecting section, for example a pin, which can engage in an associated recess (e.g. socket) provided on the holding frame.
  • the secondary optics unit is therefore also designed as a complex structural unit, which combines all the functional components of the secondary optics and includes means for adjusting them.
  • the light module 10 essentially has four functional main components, each of which is designed as a pre-assembled complex structural unit: a light source unit 12, a primary optical unit 14, a holding frame 16 and a secondary optical unit 18. These structural units are shown in the illustrations according to Figure 1 and 2 Pictured lined up along a mounting direction 20. For the final assembly of the light module 10, the preassembled structural units 12, 14, 16, 18 are moved towards one another and joined essentially along the assembly direction 20.
  • the light source unit 12 comprises a printed circuit board 22, which forms a front side 24 of the light source unit 12. In the assembled state of the light module 10, this front side 24 faces the primary optics unit 14.
  • a multiplicity of semiconductor light sources 26 designed as LEDs are arranged in groups on the printed circuit board 22. Furthermore, electrical and electronic components of a control device are arranged on the printed circuit board 22, by means of which the individual semiconductor light sources 26 can be controlled to emit light.
  • the printed circuit board 22 On its rear side facing away from the primary optics unit 14 in the assembled state of the light module 10, the printed circuit board 22 is connected in a heat-conducting manner to a heat sink 28 (indicated in FIG Fig. 2 ). As a result, the heat emitted by the semiconductor light sources 26 and the power loss of the other electrical and electronic components can be effectively dissipated during operation of the light module 10.
  • the light source unit 12 also comprises a ventilation device 30 arranged in the area of the aforementioned rear side of the printed circuit board 22 (cf. Fig. 1 ). This serves to blow the heat sink 28 with air for better cooling.
  • the primary optics unit 14 has a primary optics element 32.
  • the primary optics element 32 comprises a multiplicity of light exit surfaces 34, which are arranged so as to run next to one another in such a way that a coherent primary optics exit surface 36 is created.
  • the primary optical element 32 has a multiplicity of light entry surfaces (not shown in more detail), which in the assembled state of the light module 10 are assigned to the semiconductor light sources 26 and are arranged in groups. The light coupled into the primary optics element 32 through these light entry surfaces leads to a light distribution on the primary optics exit surface 36, which is projected via the secondary optics unit 18 into the light distribution emitted by the light module 10.
  • the holding frame 16 is arranged between the light source unit 12 and the primary optics unit 14 on the one hand and the secondary optics unit 18 on the other hand. This is designed like a frame so that a light path between the primary optics unit 14 and the secondary optics unit 18 remains free through the holding frame 16.
  • the holding frame 16 has a first fitting section 40 which is designed such that the primary optics unit 14 can be received in the first fitting section 40 for attachment to the holding frame 16.
  • the primary optics unit 14 is inserted into the fitting section 40 designed as a recess along the mounting direction 20 (cf. Figure 2 ).
  • the holding frame 16 also has a second fitting section 42, which is designed to enable the secondary optics unit 18 to be fixed in position on the holding frame 16.
  • the holding frame 16 has a bearing section 45, which in the example shown is designed as a spherical section 45 (cf. Fig. 2 ).
  • This ball section 45 is mounted in a corresponding ball socket in the headlight housing (not shown).
  • the holding frame also has a first articulation projection 46 and a second articulation projection 47 as alignment sections. These serve to adjust and change the alignment of the light module 10 in a headlight housing, in particular by tilting or shifting the light module 10. For example, a vertical alignment takes place via the first articulation projection 46, and a horizontal alignment via the second articulation projection 47.
  • the first and the second articulation projection 46, 47 each have a through opening for receiving a guide rod, by means of which the light module can be aligned.
  • Alignment can be done manually or by motor.
  • the orientation of a specific light module in a motor vehicle can be adapted to the orientation of other light modules of the motor vehicle.
  • the secondary optics unit 18 comprises a lens device 48 designed as a converging lens. This is designed to project the light distribution that arises on the primary optics exit surface 36 into a radiation light distribution during operation of the light module 10.
  • the secondary optics unit 18 comprises
  • a lens holder 50 which on the one hand serves to hold the lens device, on the other hand contributes to an accurate position of the secondary optics unit 18.
  • the lens holder 50 is designed like a frame in the manner of a hollow body open on both sides, so that in the assembled state of the light module 10, the light path from the primary optics exit surface 36 through the holding frame 16 and through the lens holder 50 remains clear.
  • the section of the lens holder 50 facing away from the lens device 48 is designed as a fitting section 52.
  • the lens holder 50 widens like a collar in the region of the fitting section 52, so that the second fitting section 42 of the holding frame 16 can be fitted precisely against the fitting section 52 of the lens holder 50.
  • the secondary optics unit 18 also has a decorative element 54, which is designed like a frame and is arranged on the lens holder 50 in such a way that it surrounds the lens device 48 like a frame.
  • a first fastening device for fastening the primary optics unit 14 to the light source unit 12 in a precise position.
  • This first fastening device comprises projecting (in particular bolt-like) fastening sections 56, which are arranged on the light source unit 12.
  • the fastening sections 56 extend over the front side 24 of the light source unit 12 in the direction of the primary optics unit 14.
  • the primary optics unit 14 has correspondingly assigned fastening sections 58, which are designed as cylindrical recesses such that the fastening sections 56 can engage in the cylinder recesses 58 (cf. Figure 1 ). Via the mutually coordinated fastening sections 56 and 58, a positionally precise and adjustable fastening of the primary optics unit 14 to the light source unit 12 is made possible.
  • the final assembly of the light module 10 also takes place via a second fastening device which is designed for the positionally accurate fastening of the secondary optics unit 18 in relation to the primary optics unit 14.
  • the holding frame 16 first contributes to the second fastening device. With its first fitting section 40, the latter accommodates the primary optics unit 14, in particular together with the light source unit 12.
  • the second fitting section 42 of the holding frame 16 provides a recess 60 which acts as a fastening means for the secondary optics unit 18.
  • the recess 60 is designed such that a pin-like projection 62 of the fitting section 52 on the lens holder 50 can engage in the recess 60. This enables both an exact positional alignment and an attachment of the secondary optics unit 18. In this way, the disturbing dispersion effects (for example formation of a color fringe) explained at the outset in the light module 10 can be largely reduced by precisely aligning the lens device with respect to the primary optics exit surface 36.
  • a radiation light distribution can be emitted in a main emission direction 70.
  • the adjustment and relative alignment of the individual structural units (in particular 12, 14, 16, 18) with respect to one another is retained even when the light module 10 is installed in a headlight housing.
  • the optical entry when looking into the headlight housing is then essentially determined by the decorative element 54.

Description

Die Erfindung betrifft ein Lichtmodul, wie es insbesondere in Kfz-Scheinwerfern Verwendung finden kann.The invention relates to a light module, as can be used in particular in motor vehicle headlights.

Unter einem Lichtmodul wird im vorliegenden Zusammenhang die eigentliche lichtaussendende Einheit eines Scheinwerfers verstanden, welche die gewünschte Abstrahllichtverteilung abgibt. Je nach Anwendungsgebiet soll die Abstrahllichtverteilung bestimmte, in der Regel gesetzlich vorgegebene, charakteristische Intensitätsverläufe aufweisen.In the present context, a light module is understood to mean the actual light-emitting unit of a headlight, which emits the desired radiation distribution. Depending on the field of application, the light distribution should have certain, usually legally prescribed, characteristic intensity profiles.

Zum einen sollen abgeblendete Lichtverteilungen bereitgestellt werden, beispielsweise als Abblendlicht oder Nebellicht. Eine abgeblendete Lichtverteilung zeichnet sich durch eine abschnittsweise im Wesentlichen horizontal verlaufende Hell-Dunkel-Grenze aus. Vorzugsweise verläuft dabei ein dem Gegenverkehr zugewandter Abschnitt der Hell-Dunkel-Grenze vertikal niedriger, als ein dem Gegenverkehr abgewandter Abschnitt der Hell-Dunkel-Grenze. Zwischen diesen beiden horizontal verlaufenden Abschnitten kann ein schräg ansteigender Abschnitt der Hell-Dunkel-Grenze liegen (sog. "Z-shape" Lichtverteilung).On the one hand, dimmed light distributions are to be provided, for example as low beam or fog light. A dimmed light distribution is characterized by a light-dark boundary that runs essentially horizontally in sections. Preferably, a section of the cut-off line that faces oncoming traffic runs vertically lower than a section of the cut-off line that faces away from oncoming traffic. Between these two horizontal sections there can be a sloping section of the cut-off line (so-called "Z-shape" light distribution).

Andererseits soll oftmals eine Fernlicht-Lichtverteilung erzeugt werden. Diese setzt sich in der Regel aus einem vergleichsweise eingeengten ausgeleuchteten Bereich oberhalb der Hell-Dunkel-Grenze (Spot-Lichtverteilung) und einer Grundlichtverteilung zur gleichmäßigen Ausleuchtung unterhalb der Hell-Dunkel-Grenze zusammen.On the other hand, a high beam light distribution should often be generated. This usually consists of a comparatively narrow illuminated area above the cut-off line (spot light distribution) and a basic light distribution for uniform illumination below the cut-off line.

Eine Weiterentwicklung besteht darin, ein sogenanntes Teil-Fernlicht bereitzustellen. Dabei wird in der Fernlicht-Lichtverteilung gezielt ein ausgewählter Bereich der abgestrahlten Lichtverteilung verdunkelt. Dadurch kann ein gefährliches Blenden von Gegenverkehr vermieden werden. Denkbar ist jedoch auch, dass gezielt bestimmte Bereiche hell erleuchtet werden, um die Aufmerksamkeit des Fahrers auf diese Bereiche zu lenken. Entsprechende Ausgestaltungen sind auch für die abgeblendete Lichtverteilung vorteilhaft (sogenanntes Teil-Abblendlicht). Die erforderliche Abdunkelung von bestimmten Bereichen der abgestrahlten Lichtverteilung erfolgt vorzugsweise automatisiert im Zusammenspiel mit geeigneten Sensoren zur Erfassung von Gegenverkehr oder sonstigen Objekten. Dadurch kann ein dynamisches Teil-Fernlicht oder ein "blendfreies Fernlicht" oder ein dynamisches Abblendlicht realisiert werden.A further development is to provide a so-called partial high beam. In the high beam light distribution, a selected area of the emitted light distribution is specifically darkened. This prevents dangerous oncoming traffic from being dazzled. However, it is also conceivable for specific areas to be brightly illuminated in order to draw the driver's attention to these areas. Corresponding configurations are also advantageous for the dimmed light distribution (so-called partial low beam). The required darkening of certain areas of the emitted light distribution is preferably carried out automatically in conjunction with suitable sensors for detecting oncoming traffic or other objects. This enables a dynamic partial high beam or a "glare-free high beam" or a dynamic low beam to be implemented.

Grundsätzlich ist es erwünscht, eine oder mehrere der angesprochenen Lichtverteilungen mit einem einzigen Lichtmodul zu erzeugen. Hierfür sind verschiedene technische Lösungen bekannt.In principle, it is desirable to generate one or more of the light distributions mentioned with a single light module. Various technical solutions are known for this.

Beispielsweise beschreiben die Druckschriften DE 10 2008 013 603 A1 , DE 10 2010 023 360 A2 und DE 10 2009 053 581 B3 Lichtmodule, welche den folgenden grundlegenden Aufbau haben: Eine matrixartige Anordnung von Halbleiterlichtquellen und eine Primäroptik mit matrixartig angeordneten Lichtleitelementen, welche jeweils eine Lichteintrittsfläche und eine Lichtaustrittsfläche aufweisen. Dabei ist jeweils eine Lichteintrittsfläche einer Halbleiterlichtquelle zugeordnet. Die Lichtaustrittsflächen sind ebenfalls matrixartig angeordnet und bilden eine Primäroptikaustrittsfläche. Die beschriebenen Lichtmodule haben ferner eine Sekundäroptik, welche dazu eingerichtet ist, die sich auf der Primäroptikaustrittsfläche einstellende Lichtverteilung zur Erzielung einer gewünschten Abstrahllichtverteilung auf ein vor dem Scheinwerfer bzw. vor dem Lichtmodul liegendes Vorfeld abzubilden oder zu projizieren.For example, describe the publications DE 10 2008 013 603 A1 . DE 10 2010 023 360 A2 and DE 10 2009 053 581 B3 Light modules, which have the following basic structure: A matrix-like arrangement of semiconductor light sources and a primary optics with matrix-like arranged light guide elements, each having a light entry surface and a light exit surface. A light entry surface is assigned to a semiconductor light source. The light exit surfaces are also arranged in a matrix and form a primary optics exit surface. The light modules described also have secondary optics, which is set up to image or project the light distribution which arises on the primary optics exit surface in order to achieve a desired emission light distribution on an apron located in front of the headlight or in front of the light module.

Mit derartigen Lichtmodulen kann ein Teil-Fernlicht oder ein Teil-Abblendlicht dadurch realisiert werden, dass gezielt einzelne der Halbleiterlichtquellen ausgeschaltet werden, wobei die übrigen Halbleiterlichtquellen weiterhin Licht abstrahlen.With such light modules, a partial high beam or a partial low beam can be realized by specifically switching off individual ones of the semiconductor light sources, the other semiconductor light sources continuing to emit light.

Für die Funktionsfähigkeit der beschriebenen Lichtmodule ist eine genaue Positionierung der verschiedenen Bauteile zueinander von entscheidender Bedeutung. Zum einen soll die Lichteintrittsfläche eines Lichtleitelements der Primäroptik möglichst nahe an die Lichtabstrahlfläche der zugeordneten Halbleiterlichtquelle positioniert werden. Außerdem sollen die Lichtabstrahlflächen und die Lichteintrittsflächen derart zueinander ausgerichtet werden, dass ein möglichst großer Anteil des abgestrahlten Lichts durch die Lichteintrittsfläche in die Primäroptik eingekoppelt werden kann. Ein zu großer Abstand zwischen Lichtabstrahlfläche und Lichteintrittsfläche oder eine ungenaue Positionierung führen dazu, dass ein Teil des von der Halbleiterlichtquelle erzeigten Lichts nicht für die Abstrahllichtverteilung genutzt wird und so zu einer geringeren Effizienz des Lichtmoduls.Precise positioning of the various components in relation to one another is crucial for the functionality of the light modules described. On the one hand, the light entry surface of a light guide element of the primary optics should be positioned as close as possible to the light emission surface of the associated semiconductor light source. In addition, the light emission surfaces and the light entry surfaces should be aligned with one another in such a way that the largest possible proportion of the emitted light can be coupled into the primary optics through the light entry surface. If the distance between the light emission surface and the light entry surface is too large or the positioning is inaccurate, part of the light emitted by the semiconductor light source is not used for the distribution of the light emission and the efficiency of the light module is reduced.

Die mit dem Lichtmodul abstrahlbare Lichtverteilung wird außerdem durch die Lichtverteilung beeinflusst, welche sich auf der Primäroptikaustrittsfläche einstellt und welche über die Sekundäroptik projiziert wird. Auch die sich auf der Primäroptikaustrittsfläche einstellende Lichtverteilung kann empfindlich von der Positionierung der Lichteintrittsflächen relativ zu den Halbleiterlichtquellen abhängen.The light distribution that can be emitted by the light module is also influenced by the light distribution that arises on the primary optics exit surface and that is projected via the secondary optics. Also the light distribution on the primary optics exit surface can depend sensitively on the positioning of the light entry surfaces relative to the semiconductor light sources.

Die Sekundäroptik soll präzise relativ zur Primäroptikaustrittsfläche positioniert werden. Andernfalls können aufgrund von Dispersionseigenschaften der (in der Regel als Sammellinse ausgebildeten) Sekundäroptik unerwünschte Farbränder (Farbsaum) in der abgestrahlten Lichtverteilung auftreten.The secondary optics should be positioned precisely relative to the primary optics exit surface. Otherwise, due to the dispersion properties of the secondary optics (usually designed as a converging lens), undesired color edges (color fringes) can appear in the emitted light distribution.

Bei der Konstruktion von Lichtmodulen der genannten Art sind daher hohe Anforderungen an die Positionsgenauigkeit der Bauteile zu stellen. Dies kann zu einem hohen Herstellungsaufwand und damit zu hohen Kosten führen.When designing light modules of the type mentioned, high demands are therefore made on the positional accuracy of the components. This can lead to high manufacturing costs and thus high costs.

Werden die Lichtmodule in Kfz-Scheinwerfern verbaut, so ist darüber hinaus eine Justierung der Lichtmodule in dem jeweiligen Scheinwerfergehäuse und in Bezug zu etwaigen weiteren optischen Elementen des Scheinwerfers vorzunehmen. Ferner muss ein Lichtmoduls eines Kfz-Scheinwerfers in der Regel bezüglich der Lichtmodule in anderen Scheinwerfern desselben Kfz ausgerichtet werden. Insofern kann die Ausrichtung des Lichtmoduls im Scheinwerfer problematisch sein.If the light modules are installed in motor vehicle headlights, then the light modules must also be adjusted in the respective headlight housing and in relation to any other optical elements of the headlight. Furthermore, a light module of a motor vehicle headlight generally has to be aligned with respect to the light modules in other headlights of the same motor vehicle. In this respect, the alignment of the light module in the headlight can be problematic.

Ein LED-Lichtquellensystem mit den Merkmalen des Oberbegriffs des Anspruchs 1 ist in der EP 1 925 876 A1 beschrieben.An LED light source system with the features of the preamble of claim 1 is in the EP 1 925 876 A1 described.

Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, ein Lichtmodul bereitzustellen, das mit hoher Präzision bezüglich der Ausrichtung der optisch funktionalen Teile zueinander herstellbar ist und flexibel in verschiedenen Scheinwerfern einsetzbar ist. Außerdem soll bei der Herstellung des Lichtmoduls die erforderliche Kalibrierung vereinfacht werden.Against this background, the object of the invention is to provide a light module which can be manufactured with great precision with respect to the alignment of the optically functional parts with respect to one another and is flexible can be used in different headlights. In addition, the calibration required during the manufacture of the light module is to be simplified.

Die erfindungsgemäße Lösungsidee besteht darin, für das Lichtmodul einen modularen Aufbau aus vormontierten Baueinheiten vorzusehen. Diese müssen zur Endmontage des Lichtmoduls lediglich zusammengefügt werden. Die erforderlichen Justierungen und Kalibrierungen können in vorteilhafter Weise beim Zusammenfügen der vormontierten Baueinheiten erfolgen.The solution idea according to the invention is to provide a modular structure of preassembled units for the light module. These only have to be put together for final assembly of the light module. The necessary adjustments and calibrations can advantageously be carried out when the preassembled structural units are assembled.

Gemäß Anspruch 1 wird ein Lichtmodul vorgeschlagen, welches die folgende Baueinheiten umfasst:

  • Eine Lichtquelleneinheit, welche eine Mehrzahl von gruppiert, insbesondere matrixartig angeordneten Halbleiterlichtquellen zum Ausstrahlen von Licht aufweist;
  • eine Primäroptikeinheit, welche optische Elemente mit Lichteintrittsflächen zum Einkoppeln des ausstrahlbaren Lichts in das optische Element sowie Lichtaustrittsflächen zum Auskoppeln von Licht aus dem optischen Element durch die Lichtaustrittsfläche hindurch aufweist;
  • eine Sekundäroptikeinheit, welche eine Linseneinrichtung zum Projizieren oder Abbilden der sich in Betrieb des Lichtmoduls auf den Lichtaustrittsflächen einstellenden Lichtverteilung in eine Abstrahllichtverteilung in das vor dem Lichtmodul liegende Vorfeld aufweist. Die Sekundäroptikeinheit umfasst außerdem einen Linsenhalter zum Halten der Linseneinrichtung.
According to claim 1, a light module is proposed which comprises the following structural units:
  • A light source unit which has a plurality of grouped, in particular matrix-like arranged semiconductor light sources for emitting light;
  • a primary optics unit which has optical elements with light entry surfaces for coupling the emittable light into the optical element and light exit surfaces for coupling light out of the optical element through the light exit surface;
  • a secondary optics unit, which has a lens device for projecting or imaging the light distribution that arises during operation of the light module on the light exit surfaces into a radiation light distribution in the apron located in front of the light module. The secondary optics unit also includes a lens holder for holding the lens device.

Die Lichtquelleneinheit, die Primäroptikeinheit und die Sekundäroptikeinheit sind jeweils als vormontierte Baueinheiten ausgebildet, welche zur Endmontage des Lichtmoduls zusammengefügt werden. Die Endmontage wird dadurch ermöglicht, dass eine erste Befestigungseinrichtung zum positionsgenauen Befestigen der Primäroptikeinheit an der Lichtquelleneinheit vorgesehen ist. Darüber hinaus ist eine zweite Befestigungseinrichtung vorgesehen, die dazu ausgebildet ist, die Sekundäroptikeinheit positionsgenau in Bezug auf die Primäroptikeinheit zu befestigen. Die zweite Befestigungseinrichtung umfasst einen Halterahmen, welcher zur Anordnung zwischen der Primäroptikeinheit und der Sekundäroptikeinheit eingerichtet ist, wobei die Primäroptikeinheit zwischen dem Halterahmen und der Lichtquelleneinheit aufgenommen ist. Der Halterahmen weist einen Gehäusebefestigungsabschnitt zur Befestigung des Lichtmoduls in einem Scheinwerfer-Gehäuse auf.The light source unit, the primary optics unit and the secondary optics unit are each designed as preassembled units which are assembled for the final assembly of the light module. The final assembly is made possible by the fact that a first fastening device is provided for fastening the primary optics unit to the light source unit in a positionally accurate manner. In addition, a second fastening device is provided, which is designed to fasten the secondary optics unit in the correct position with respect to the primary optics unit. The second fastening device comprises a holding frame, which is set up for arrangement between the primary optics unit and the secondary optics unit, the primary optics unit being accommodated between the holding frame and the light source unit. The holding frame has a housing fastening section for fastening the light module in a headlight housing.

Die Befestigung erfolgt insofern positionsgenau, als dass eine Befestigung an einem bezüglich aller drei Raumrichtungen in gewissem Umfang vorgebbaren Ort relativ zum Bezugsobjekt möglich ist.The attachment is carried out in a precise position insofar as attachment is possible at a location relative to the reference object that can be predetermined to a certain extent with respect to all three spatial directions.

Der erfindungsgemäße Aufbau aus vormontierten Baueinheiten hat den Vorteil, dass jede der Baueinheiten für sich auf ihre Funktion getestet werden kann. Dies ermöglicht eine Qualitätskontrolle bereits bei der Fertigung der einzelnen Baueinheiten.The construction according to the invention from preassembled units has the advantage that each of the units can be tested for their function. This enables quality control already during the manufacture of the individual building units.

Außerdem kann durch den modularen Aufbau die kritische Ausrichtung der einzelnen Baueinheiten auf einfache Weise während der Endmontage erfolgen. Hierzu können die Baueinheiten schrittweise zueinander ausgerichtet, justiert und kalibriert und befestigt werden.In addition, due to the modular structure, the critical alignment of the individual units can be carried out easily during final assembly. For this purpose, the units can be aligned, adjusted and calibrated and fastened to each other step by step.

Zum einen kann die Primäroptikeinheit derart positionsgenau mit der Lichtquelleneinheit zusammengefügt werden, dass die Lichteintrittsflächen den jeweiligen Halbleiterlichtquellen genau zugeordnet sind. Dies ist insbesondere vorteilhaft, wenn die Primäroptikeinheit eine matrixartige Anordnung von Lichteintrittsflächen aufweist, welche den ebenfalls matrixartig angeordneten Halbleiterlichtquellen jeweils individuell zugeordnet werden sollen.On the one hand, the primary optics unit can be assembled with the light source unit in such a precise position that the light entry surfaces are precisely assigned to the respective semiconductor light sources. This is particularly advantageous if the primary optics unit has a matrix-like arrangement of light entry surfaces, which are each to be individually assigned to the semiconductor light sources, which are likewise arranged in a matrix.

Die zusammengefügte Untereinheit aus Lichtquelleneinheit und Primäroptikeinheit kann dann auf ihre Funktion getestet werden. Die sich auf den Lichtaustrittsflächen einstellende Lichtverteilung beeinflusst entscheidend die abgestrahlte Lichtverteilung des Lichtmoduls. Es kann überprüft werden, ob die Zuordnung der optischen Elemente zu den jeweiligen Halbleiterlichtquellen den gestellten Anforderungen entspricht, z.B. ob in jedes optische Element ausreichend Licht eingekoppelt wird. Ferner kann eine elektrische Kalibrierung der Abstrahlleistungen der einzelnen Halbleiterlichtquellen unter Berücksichtigung der Wirkung der zugeordneten optischen Elemente vorgenommen werden.The function of the subunit composed of the light source unit and the primary optics unit can then be tested. The light distribution that arises on the light exit surfaces decisively influences the light distribution emitted by the light module. It can be checked whether the assignment of the optical elements to the respective semiconductor light sources meets the requirements, e.g. whether sufficient light is coupled into each optical element. Furthermore, an electrical calibration of the radiation powers of the individual semiconductor light sources can be carried out taking into account the effect of the assigned optical elements.

In weiteren Endmontageschritten kann die Sekundäroptikeinheit zum Aufbau des Lichtmoduls hinzugefügt werden. Hierbei erlaubt die zweite Befestigungseinrichtung eine genaue Positionierung der Linseneinrichtung in Bezug auf die Lichtabstrahlflächen der Primäroptikeinheit. Durch diese Kalibrierung können die erläuterten Dispersionseffekte minimiert werden. Insgesamt ermöglicht das erfindungsgemäße Lichtmodul einen kostengünstigen und einfachen Endmontagevorgang.In further final assembly steps, the secondary optics unit can be added to set up the light module. Here, the second fastening device allows the lens device to be positioned precisely in relation to the light-emitting surfaces of the primary optics unit. The described dispersion effects can be minimized by this calibration. Overall, the light module according to the invention enables an inexpensive and simple final assembly process.

Die Baueinheiten sind derart ausgebildet, dass sie entlang einer Montagerichtung zusammengefügt, z.B. zusammengeschoben oder zusammengesteckt werden und aneinander befestigt werden können. Die verschiedenen Baueinheiten werden vorzugsweise in der Reihenfolge jeweils miteinander verbunden und zusammengefügt, wie sie funktional entlang des Lichtweges wirken. Insbesondere wird zunächst die Primäroptikeinheit entlang der Montagerichtung mit der Lichtquelleneinheit zusammengefügt. Auf diese Kombinationsbaugruppe wird dann vorzugsweise ein Halterahmen entlang der Montagerichtung aufgeschoben und verbunden. Vorzugsweise als letztes wird auf die jeweilige Kombinationsbaugruppe (je nach Ausführungsform mit oder ohne den Halterahmen) die Sekundäroptikeinheit entlang der Montagerichtung aufgeschoben und zusammengefügt.The structural units are designed such that they are joined together along an assembly direction, e.g. pushed together or put together and can be attached to each other. The various structural units are preferably connected to one another in the order in which they functionally function along the light path. In particular, the primary optics unit is first joined together with the light source unit along the mounting direction. A holding frame is then preferably slid and connected to this combination assembly along the mounting direction. Preferably, the secondary optics unit is pushed onto the respective combination assembly (depending on the embodiment with or without the holding frame) and assembled along the direction of assembly.

Durch den modularen Aufbau, das Zusammenfügen entlang der vorgegebenen Monaterichtung und/oder das Zusammenfügen in der vorgegebenen Reihenfolge wird der Herstellungsprozess weniger fehleranfällig. Es ist eine Funktions- und Qualitätskontrolle während der einzelnen Montageschritte beziehungsweise nach jedem Montageschritt möglich.Due to the modular structure, the assembly along the given monthly direction and / or the assembly in the given order, the manufacturing process is less prone to errors. Functional and quality control is possible during the individual assembly steps or after each assembly step.

Ferner kann das erfindungsgemäß aufgebaute Lichtmodul als Einheit in einem Scheinwerfer verbaut werden. Dabei bleibt die sensible Kalibrierung zwischen Lichtquelleneinheit und Primäroptikeinheit sowie zwischen Primäroptikeinheit und Sekundäroptikeinheit erhalten.Furthermore, the light module constructed according to the invention can be installed as a unit in a headlight. The sensitive calibration between the light source unit and the primary optics unit and between the primary optics unit and the secondary optics unit is retained.

Unter der Abstrahllichtverteilung wird im vorliegenden Zusammenhang diejenige Lichtverteilung verstanden, welche durch die Linseneinrichtung der Sekundäroptikeinheit aus der sich auf den Lichtaustrittsflächen der Primäroptikeinheit einstellenden Lichtverteilung erzeugt wird. Die Abstrahllichtverteilung dient dann bei einem Kfz-Scheinwerfer zum Ausleuchten des vor dem Lichtmodul beziehungsweise vor dem Scheinwerfer liegenden Vorfeldes. Dies definiert für das Lichtmodul eine Hauptabstrahlrichtung.In the present context, the light distribution is understood to mean that light distribution which is generated by the lens device of the secondary optics unit from the light distribution which arises on the light exit surfaces of the primary optics unit. In a motor vehicle headlight, the radiation light distribution then serves to illuminate the apron located in front of the light module or in front of the headlight. This defines a main emission direction for the light module.

Die erste Befestigungseinrichtung umfasst vorzugsweise einen Befestigungsabschnitt der Lichtquelleneinheit einerseits und einen zugeordneten Befestigungsabschnitt der Primäroptikeinheit andererseits. Insofern stellt die erste Befestigungseinrichtung nicht notwendigerweise ein separates Bauteil dar, sondern wird durch die beiden angesprochenen Befestigungsabschnitte gebildet. Die Befestigungsabschnitte sind aufeinander abgestimmt ausgebildet, beispielsweise derart, dass sie zur Befestigung ineinander eingreifen können. Beispielsweise weist der Befestigungsabschnitt der Lichtquelleneinheit einen vorspringenden Abschnitt auf, beispielsweise einen Befestigungsstift. Der Befestigungsabschnitt der Primäroptikeinheit weist dann eine zugeordnete Ausnehmung auf, in welcher der vorspringende Abschnitt aufgenommen werden kann (z.B. in der Art einer Buchse).The first fastening device preferably comprises a fastening section of the light source unit on the one hand and an associated fastening section of the primary optics unit on the other hand. In this respect, the first fastening device does not necessarily represent a separate component, but is formed by the two fastening sections mentioned. The fastening sections are designed to match one another, for example in such a way that they can engage in one another for fastening. For example, the fastening section of the light source unit has a projecting section, for example a fastening pin. The fastening section of the primary optics unit then has an associated recess in which the projecting section can be received (e.g. in the manner of a socket).

Der Halterahmen weist vorzugsweise einen ersten Passabschnitt zur Verbindung mit der Primäroptikeinheit, sowie einen zweiten Passabschnitt zur positionsgenauen Befestigung der Sekundäroptikeinheit in Bezug auf die Primäroptikeinheit auf.The holding frame preferably has a first fitting section for connection to the primary optics unit, and a second fitting section for fastening the secondary optics unit in a positionally accurate manner with respect to the primary optics unit.

Das Lichtmodul hat dann vier funktionale Hauptkomponenten: Die Lichtquelleneinheit, die Primäroptikeinheit, den Halterahmen und die Sekundäroptikeinheit. Diese können zur Endmontage einfach zusammengefügt werden.The light module then has four functional ones Main components: the light source unit, the primary optics unit, the holding frame and the secondary optics unit. These can simply be put together for final assembly.

Der erste Passabschnitt des Halterahmens kann Verbindungselemente zur Befestigung der Primäroptikeinheit aufweisen. Vorteilhaft kann jedoch sein, dass keine unmittelbare Befestigung von Primäroptik am Halterahmen erfolgt, der erste Passabschnitt also keine Verbindungselemente zur unmittelbaren Befestigung der Primäroptikeinheit aufweist. Dann ist die Primäroptik insbesondere über die Lichtquelleneinheit mit dem Halterahmen verbunden.The first fitting section of the holding frame can have connecting elements for fastening the primary optics unit. However, it can be advantageous that the primary optics are not directly attached to the holding frame, that is to say that the first fitting section has no connecting elements for directly attaching the primary optics unit. Then the primary optics are connected to the holding frame in particular via the light source unit.

Die Primäroptikeinheit wird vorzugsweise ohne Mittel zur unmittelbaren Befestigung (z.B. Verschraubung) von Primäroptik am Halterahmen zwischen dem Halterahmen und der Lichtquelleneinheit aufgenommen. Insbesondere kann der Halterahmen derart auf die Lichtquelleneinheit angepasst ausgebildet sein, dass beim Zusammenfügen ein Montageraum gebildet wird, in welchen die Primäroptikeinheit passgenau aufgenommen werden kann.The primary optics unit is preferably received without means for directly attaching (e.g. screwing) the primary optics to the holding frame between the holding frame and the light source unit. In particular, the holding frame can be designed so that it is adapted to the light source unit in such a way that an assembly space is formed during assembly, in which the primary optics unit can be accommodated with a precise fit.

Die Lichtquelleneinheit ist insbesondere von hinten, also aus Richtung entgegengesetzt zur Lichtabstrahlrichtung des Lichtmoduls, mit dem Halterahmen lösbar verschraubt. Dies ermöglicht es, die Lichtquelleneinheit im Lichtmodul auszuwechseln, z.B. zu Wartungszwecken.The light source unit is in particular from behind, that is from the direction opposite to the light emission direction of the light module, with the Retaining frame detachably screwed. This makes it possible to replace the light source unit in the light module, for example for maintenance purposes.

Insbesondere ist der erste Passabschnitt in der Art einer Ausnehmung des Halterahmens ausgebildet, in welche ein zugeordneter Abschnitt der Primäroptikeinheit oder ein die Primäroptikeinheit einfassendes Teilgehäuse als Ganzes aufgenommen werden kann. Der zweite Passabschnitt umfasst insbesondere Befestigungsmittel zur positionsgenauen Befestigung und/oder zur Justierung der Position der Sekundäroptikeinheit. Vorzugsweise sind diese Befestigungsmittel derart ausgebildet, dass eine lösbare und wieder befestigbare Verbindung zur Sekundäroptikeinheit möglich ist.In particular, the first fitting section is designed in the manner of a recess in the holding frame, into which an associated section of the primary optics unit or a partial housing enclosing the primary optics unit can be received as a whole. The second fitting section comprises, in particular, fastening means for precise fastening and / or for adjusting the position of the secondary optics unit. These fastening means are preferably designed such that a releasable and re-attachable connection to the secondary optics unit is possible.

Der Halterahmen dient außerdem als Schnittstelle zwischen dem Lichtmodul und einem Scheinwerfergehäuse eines Scheinwerfers, in welchen das Lichtmodul eingebaut werden soll. Hierzu weist der Halterahmen einen Gehäusebefestigungsabschnitt zur Befestigung des Lichtmoduls im Scheinwerfer-Gehäuse auf. Denkbar ist auch, dass der Halterahmen einen Lagerabschnitt (z.B. Kugelabschnitt) aufweist, über welchen das Lichtmodul ein einem Scheinwerfergehäuse gelagert werden kann. Außerdem kann der Halterahmen einen oder mehrere Ausrichtungsabschnitte aufweisen, über welchen die Orientierung des Lichtmoduls im Scheinwerfer-Gehäuse dadurch verändert werden kann, dass das Lichtmodul durch Kraftausübung auf den Ausrichtungsabschnitt verkippt und/oder verschoben werden kann. Beispielsweise hat der Halterahmen hierzu einen Vorsprung mit einer durchgehenden Öffnung zur Aufnahme einer Führungsstange, mittels welcher das Lichtmodul ausgerichtet werden kann.The holding frame also serves as an interface between the light module and a headlight housing of a headlight, in which the light module is to be installed. For this purpose, the holding frame has a housing fastening section for fastening the light module in the headlight housing. It is also conceivable that the holding frame has a bearing section (for example a spherical section), via which the light module can be mounted in a headlight housing. In addition, the holding frame can have one or more alignment sections, via which the orientation of the light module in the headlight housing can be changed in that the light module can be tilted and / or displaced by exerting force on the alignment section. For example, the holding frame has a projection with a through opening for receiving a guide rod, by means of which the light module can be aligned.

Die zweite Befestigungseinrichtung ist vorzugsweise derart ausgebildet, dass die Sekundäroptikeinheit lösbar und wieder befestigbar angeordnet ist. Dies ermöglicht es, die Sekundäroptikeinheit zur Justierung zu lösen und wieder zu befestigen und so eine positionsgenaue Ausrichtung der Linseneinrichtung zu erzielen.The second fastening device is preferably designed such that the secondary optics unit is detachably and reattachably arranged. This makes it possible to loosen the secondary optics unit for adjustment and to reattach it and thus achieve a positionally accurate alignment of the lens device.

Als Halbleiterlichtquellen kommen üblicherweise LEDs (Leuchtdioden) zum Einsatz. Insbesondere umfasst die Lichtquelleneinheit eine Vielzahl von LED-Chips mit jeweils einer Lichtabstrahlfläche, wobei die Lichtabstrahlflächen der LED-Chips matrixartig zueinander angeordnet sind. Die Lichtquelleneinheit kann auch eine Mehrzahl von LEDs aufweisen, welche in einer gewünschten (z.B. auch unregelmäßigen) Anordnung auf einer Leiterplatine positioniert sind. Dabei kann die Leiterplatine eine Frontseite der Lichtquelleneinheit bilden. Diese Frontseite ist im zusammengebauten Zustand der Primäroptikeinheit zugewandt.LEDs (light-emitting diodes) are usually used as semiconductor light sources. In particular, the light source unit comprises a plurality of LED chips, each with a light emission surface, the light emission surfaces of the LED chips being arranged in a matrix-like manner with respect to one another. The light source unit can also have a plurality of LEDs which are positioned in a desired (e.g. also irregular) arrangement on a printed circuit board. The circuit board can form a front of the light source unit. When assembled, this front side faces the primary optics unit.

Auf der von der im zusammengebauten Zustand des Lichtmoduls von der Primäroptikeinheit weg orientierten Seite der Leiterplatine kann ein Kühlkörper zur Abführung von Wärme angeordnet sein. Der Kühlkörper ist vorzugsweise thermisch mit der Leiterplatine verbunden, zum Beispiel mit wärmeleitenden Klebemitteln angeklebt. Darüber hinaus kann auf der der Primäroptikeinheit abgewandten Seite der Leiterplatine eine Lüftungseinrichtung zum Anströmen des Kühlkörpers mit Luft vorgesehen sein.A heat sink for dissipating heat can be arranged on that side of the circuit board which is oriented away from the primary optics unit in the assembled state of the light module. The heat sink is preferably thermally connected to the circuit board, for example glued with thermally conductive adhesives. In addition, a ventilation device can be provided on the side of the printed circuit board facing away from the primary optics unit for the air to flow against the heat sink.

Zur weiteren Ausgestaltung umfasst die Lichtquelleneinheit eine Steuereinrichtung, mittels welcher die Halbleiterlichtquellen unabhängig voneinander zur Lichtabgabe ansteuerbar sind. Die Steuereinrichtung kann insbesondere einzelne Halbleiterlichtquellen unabhängig voneinander einbeziehungsweise ausschalten. Dadurch kann ein variables Teil-Fernlicht oder ein blendfreies Fernlicht, wie eingangs beschrieben, mit einem einzigen, in sich geschlossenen Lichtmodul bereitgestellt werden. Denkbar ist auch, dass die Steuereinrichtung die abgestrahlten Intensitäten der einzelnen Halbleiterlichtquellen unabhängig voneinander verändern kann.For a further embodiment, the light source unit comprises a control device by means of which the semiconductor light sources are independent are controllable from each other to emit light. The control device can, in particular, switch individual semiconductor light sources on or off independently of one another. As a result, a variable partial high beam or a glare-free high beam, as described at the beginning, can be provided with a single, self-contained light module. It is also conceivable that the control device can change the emitted intensities of the individual semiconductor light sources independently of one another.

Die Steuereinrichtung ist vorzugsweise ebenfalls auf der genannten Leiterplatine der Lichtquelleneinheit angeordnet. Insgesamt stellt daher die Lichtquelleneinheit eine komplexe Baueinheit dar, welche sämtliche elektronisch funktionalen Bauteile des Lichtmoduls umfassen kann.The control device is preferably also arranged on the circuit board of the light source unit. Overall, the light source unit therefore represents a complex structural unit, which can include all electronically functional components of the light module.

Hinsichtlich der Primäroptikeinheit ergibt sich eine vorteilhafte Ausgestaltung dadurch, dass die optischen Elemente von einem zusammenhängenden Primäroptikelement bereitgestellt werden, welches eine Vielzahl von jeweils einer Halbleiterlichtquelle zuordenbaren Lichtleitabschnitten aufweist, wobei jeder der Lichtleitabschnitte eine Lichteintrittsfläche aufweist. Im zusammengebauten Zustand des Lichtmoduls ist dann jeweils ein Lichtleitabschnitt mit seiner Lichteintrittsfläche einer Halbleiterlichtquelle (beziehungsweise der zugehörigen Lichtabstrahlfläche) zugeordnet. Die Lichtleitabschnitte und/oder die Lichteintrittsflächen sind insbesondere matrixartig angeordnet, vorzugsweise entsprechend der Anordnung der Halbleiterlichtquelle. Ebenso sind die Lichtaustrittsflächen vorzugsweise matrixartig angeordnet und bilden insbesondere eine gemeinsame Primäroptikaustrittsfläche. Auf der Primäroptikaustrittsfläche stellt sich im Betrieb des Lichtmoduls die mittels der Sekundäroptikeinheit zu projizierende Lichtverteilung ein.With regard to the primary optics unit, an advantageous embodiment results from the fact that the optical elements are provided by a coherent primary optics element which has a multiplicity of light-guiding sections which can each be assigned to a semiconductor light source, each of the light-guiding sections having a light entry surface. In the assembled state of the light module, a light guide section with its light entry surface is then assigned to a semiconductor light source (or the associated light emission surface). The light guide sections and / or the light entry surfaces are in particular arranged in a matrix, preferably in accordance with the arrangement of the semiconductor light source. Likewise, the light exit surfaces are preferably matrix-like arranged and in particular form a common primary optics exit surface. When the light module is operating, the light distribution to be projected by means of the secondary optics unit is established on the primary optics exit surface.

Die Primäroptikeinheit kann ferner Führungsmittel zum Haltern und/oder zur Positionierung der einzelnen Lichtleitabschnitte des Primäroptikelements aufweisen. Insgesamt ist die Primäroptikeinheit eine komplexe Baueinheit, welche sämtliche optisch funktionalen Merkmale der Primäroptik vereint und eine genaue Justierung, insbesondere bezüglich der Lichtquelleneinheit ermöglicht.The primary optics unit can furthermore have guide means for holding and / or positioning the individual light guide sections of the primary optics element. Overall, the primary optics unit is a complex structural unit which combines all the optically functional features of the primary optics and enables precise adjustment, in particular with respect to the light source unit.

Zur weiteren Ausgestaltung kann die Sekundäroptikeinheit einen Passabschnitt zu ihrer passgenauen Befestigung (z.B. an dem zugeordneten Passabschnitt des Halterahmens) und ein die Linseneinrichtung zumindest abschnittsweise umgebendes Zierelement aufweisen. Dieses Zierelement ist derart ausgebildet und angeordnet, dass es im zusammengebauten Zustand des Lichtmoduls bei Blick auf die Sekundäroptikeinheit sichtbar ist. Das Zierelement ist zumindest auch teilweise sichtbar, wenn das Lichtmodul in einem Scheinwerfer verbaut ist. Dadurch kann ein ansprechendes Design erzielt werden. Dabei ist es nicht erforderlich, den Linsenhalter der Sekundäroptikeinheit als Designteil auszugestalten. Außerdem kann das Zierelement verändert werden, ohne den Aufbau des Lichtmoduls im Übrigen zu verändern. Daher kann das Lichtmodul in verschiedenen Scheinwerfern mit unterschiedlichem Design verwendet werden und über ein jeweils angepasstes Zierelement ein ansprechendes Aussehen erzielt werden.For a further embodiment, the secondary optics unit can have a fitting section for its precise fitting (for example on the associated fitting section of the holding frame) and a decorative element surrounding the lens device at least in sections. This decorative element is designed and arranged such that it is visible when the light module is assembled when looking at the secondary optics unit. The decorative element is at least partially visible when the light module is installed in a headlight. This enables an attractive design to be achieved. It is not necessary to design the lens holder of the secondary optics unit as a design part. In addition, the decorative element can be changed without changing the structure of the light module. Therefore, the light module can be used in different headlights with different designs and an appealing look can be achieved with an adapted decorative element.

Der Passabschnitt der Sekundäroptikeinheit ist vorzugsweise an dem Linsenhalter angeordnet oder wird von diesen bereitgestellt. Insbesondere ist der Passabschnitt derart ausgebildet, dass er passgenau an den genannten zweiten Passabschnitt des Halterahmens anliegen kann. Der Linsenhalter ist beispielsweise in der Art eines zweiseitig offenen Hohlkörpers ausgebildet, wobei eine der Öffnungen des Hohlkörpers von der Linseneinrichtung verschlossen ist und im Bereich der anderen Öffnung der Passabschnitt der Sekundäroptikeinheit bereitgestellt wird.The fitting section of the secondary optics unit is preferably arranged on or provided by the lens holder. In particular, the fitting section is designed in such a way that it can fit snugly against said second fitting section of the holding frame. The lens holder is designed, for example, in the manner of a hollow body open on both sides, one of the openings of the hollow body being closed by the lens device and the fitting section of the secondary optics unit being provided in the region of the other opening.

Der Passabschnitt der Sekundäroptikeinheit trägt insofern zur zweiten Befestigungseinrichtung bei. Vorzugsweise sind die Passabschnitte von Sekundäroptikeinheit und Halterahmen aufeinander abgestimmt ausgebildet, so dass sie zur Befestigung der Sekundäroptikeinheit ineinander eingreifen. Beispielsweise weist der Linsenhalter an seinem Passabschnitt einen vorspringenden Abschnitt, beispielsweise einen Stift, auf, welcher in eine an dem Halterahmen vorgesehene, zugeordnete Ausnehmung (z.B. Buchse) eingreifen kann.The fitting section of the secondary optics unit thus contributes to the second fastening device. The fitting sections of the secondary optics unit and the holding frame are preferably designed to be matched to one another, so that they engage in one another for fastening the secondary optics unit. For example, the lens holder has on its fitting section a projecting section, for example a pin, which can engage in an associated recess (e.g. socket) provided on the holding frame.

Insgesamt ist daher auch die Sekundäroptikeinheit als komplexe Baueinheit ausgebildet, welche sämtliche funktionalen Bauteile der Sekundäroptik vereint und Mittel zu ihrer Justierung umfassen.Overall, the secondary optics unit is therefore also designed as a complex structural unit, which combines all the functional components of the secondary optics and includes means for adjusting them.

Weitere Einzelheiten und vorteilhafte Ausgestaltungen der Erfindung sind der nachfolgenden Beschreibung zu entnehmen, anhand derer die in den Figuren dargestellte Ausführungsform der Erfindung näher beschrieben und erläutert ist.Further details and advantageous refinements of the invention can be found in the following description, on the basis of which the embodiment of the invention illustrated in the figures is described and explained in more detail.

Es zeigen:

Figur 1
vormontierte Baueinheiten eines erfindungsgemäßen Lichtmoduls in perspektivischer Darstellung;
Figur 2
die Baueinheiten gemäß Figur 1 in einer Draufsicht;
Figur 3
das durch Endmontage der vormontierten Baueinheit zusammengesetzte erfindungsgemäße Lichtmodul.
Show it:
Figure 1
preassembled units of a light module according to the invention in a perspective view;
Figure 2
the units according to Figure 1 in a top view;
Figure 3
the light module according to the invention assembled by final assembly of the preassembled unit.

In der folgenden Beschreibung sind übereinstimmende Bauteile und Merkmale jeweils mit denselben Bezugszeichen versehen.In the following description, corresponding components and features are each provided with the same reference symbols.

Anhand der Figuren 1 bis 3 wird der Aufbau eines erfindungsgemäßen Lichtmoduls 10 beschrieben. Das Lichtmodul 10 ist in seinem endmontierten Zustand in der Figur 3 in perspektivischer Darstellung gezeigt.Based on Figures 1 to 3 the structure of a light module 10 according to the invention is described. The light module 10 is in its final assembled state in the Figure 3 shown in perspective.

Wie in den Figuren 1 und 2 ersichtlich, weist das Lichtmodul 10 im Wesentlichen vier funktionale Hauptkomponenten auf, welche jeweils als vormontierte komplexe Baueinheiten ausgebildet sind: Eine Lichtquelleneinheit 12, eine Primäroptikeinheit 14, einen Halterahmen 16 sowie eine Sekundäroptikeinheit 18. Diese Baueinheiten sind in den Darstellungen gemäß Figur 1 und 2 entlang einer Montagerichtung 20 aufgereiht abgebildet. Zur Endmontage des Lichtmoduls 10 werden die vormontierten Baueinheiten 12, 14, 16, 18 im Wesentlichen entlang der Montagerichtung 20 aufeinander zu bewegt und zusammengefügt.As in the Figures 1 and 2 As can be seen, the light module 10 essentially has four functional main components, each of which is designed as a pre-assembled complex structural unit: a light source unit 12, a primary optical unit 14, a holding frame 16 and a secondary optical unit 18. These structural units are shown in the illustrations according to Figure 1 and 2 Pictured lined up along a mounting direction 20. For the final assembly of the light module 10, the preassembled structural units 12, 14, 16, 18 are moved towards one another and joined essentially along the assembly direction 20.

Die Lichtquelleneinheit 12 umfasst eine Leiterplatine 22, welche eine Frontseite 24 der Lichtquelleneinheit 12 bildet. Diese Frontseite 24 ist im zusammengebauten Zustand des Lichtmoduls 10 der Primäroptikeinheit 14 zugewandt. Auf der Leiterplatine 22 sind eine Vielzahl von als LED ausgebildeten Halbleiterlichtquellen 26 gruppiert angeordnet. Ferner sind auf der Leiterplatine 22 elektrische und elektronische Bauteile einer Steuereinrichtung angeordnet, mittels der die einzelnen Halbleiterlichtquellen 26 zur Lichtabgabe ansteuerbar sind.The light source unit 12 comprises a printed circuit board 22, which forms a front side 24 of the light source unit 12. In the assembled state of the light module 10, this front side 24 faces the primary optics unit 14. A multiplicity of semiconductor light sources 26 designed as LEDs are arranged in groups on the printed circuit board 22. Furthermore, electrical and electronic components of a control device are arranged on the printed circuit board 22, by means of which the individual semiconductor light sources 26 can be controlled to emit light.

Auf ihrer im zusammengebauten Zustand des Lichtmoduls 10 von der Primäroptikeinheit 14 abgewandten Rückseite ist die Leiterplatine 22 mit einem Kühlkörper 28 wärmeleitend verbunden (angedeutet in Fig. 2). Dadurch kann im Betrieb des Lichtmoduls 10 die von den Halbleiterlichtquellen 26 abgegebene Wärme sowie die Verlustleistung der übrigen elektrischen und elektronischen Bauteile wirksam abgeführt werden.On its rear side facing away from the primary optics unit 14 in the assembled state of the light module 10, the printed circuit board 22 is connected in a heat-conducting manner to a heat sink 28 (indicated in FIG Fig. 2 ). As a result, the heat emitted by the semiconductor light sources 26 and the power loss of the other electrical and electronic components can be effectively dissipated during operation of the light module 10.

Die Lichtquelleneinheit 12 umfasst außerdem eine im Bereich der genannten Rückseite der Leiterplatine 22 angeordnete Lüftungseinrichtung 30 (vgl. Fig. 1). Diese dient dazu, den Kühlkörper 28 zur besseren Kühlung mit Luft anzublasen.The light source unit 12 also comprises a ventilation device 30 arranged in the area of the aforementioned rear side of the printed circuit board 22 (cf. Fig. 1 ). This serves to blow the heat sink 28 with air for better cooling.

Die Primäroptikeinheit 14 weist ein Primäroptikelement 32 auf. Das Primäroptikelement 32 umfasst eine Vielzahl von Lichtaustrittsflächen 34, welche derart gruppiert nebeneinander verlaufend angeordnet sind, dass eine zusammenhängende Primäroptikaustrittsfläche 36 entsteht. Außerdem weist das Primäroptikelement 32 eine Vielzahl von nicht näher dargestellten Lichteintrittsflächen auf, welche im zusammengebauten Zustand des Lichtmoduls 10 den Halbleiterlichtquellen 26 zugeordnet sind und gruppiert angeordnet sind. Das durch diese Lichteintrittsflächen in das Primäroptikelement 32 eingekoppelte Licht führt auf der Primäroptikaustrittsfläche 36 zu einer Lichtverteilung, welche über die Sekundäroptikeinheit 18 in die von dem Lichtmodul 10 abgestrahlte Lichtverteilung projiziert wird.The primary optics unit 14 has a primary optics element 32. The primary optics element 32 comprises a multiplicity of light exit surfaces 34, which are arranged so as to run next to one another in such a way that a coherent primary optics exit surface 36 is created. In addition, the primary optical element 32 has a multiplicity of light entry surfaces (not shown in more detail), which in the assembled state of the light module 10 are assigned to the semiconductor light sources 26 and are arranged in groups. The light coupled into the primary optics element 32 through these light entry surfaces leads to a light distribution on the primary optics exit surface 36, which is projected via the secondary optics unit 18 into the light distribution emitted by the light module 10.

Zur Montage des Lichtmoduls 10 ist zwischen der Lichtquelleneinheit 12 und der Primäroptikeinheit 14 einerseits und der Sekundäroptikeinheit 18 andererseits der Halterahmen 16 angeordnet. Dieser ist rahmenartig ausgebildet, so dass das zwischen der Primäroptikeinheit 14 und der Sekundäroptikeinheit 18 ein Lichtweg durch den Halterahmen 16 hindurch frei bleibt.To mount the light module 10, the holding frame 16 is arranged between the light source unit 12 and the primary optics unit 14 on the one hand and the secondary optics unit 18 on the other hand. This is designed like a frame so that a light path between the primary optics unit 14 and the secondary optics unit 18 remains free through the holding frame 16.

Der Halterahmen 16 hat einen ersten Passabschnitt 40, welcher derart ausgebildet ist, dass die Primäroptikeinheit 14 zur Befestigung an dem Halterahmen 16 in dem ersten Passabschnitt 40 aufgenommen werden kann. Hierzu wird die Primäroptikeinheit 14 in den als Ausnehmung ausgebildeten Passabschnitt 40 entlang der Montagerichtung 20 eingeschoben (vergleiche Figur 2).The holding frame 16 has a first fitting section 40 which is designed such that the primary optics unit 14 can be received in the first fitting section 40 for attachment to the holding frame 16. For this purpose, the primary optics unit 14 is inserted into the fitting section 40 designed as a recess along the mounting direction 20 (cf. Figure 2 ).

Der Halterahmen 16 weist ferner einen zweiten Passabschnitt 42 auf, welcher dazu ausgebildet ist, eine positionsgenaue Befestigung der Sekundäroptikeinheit 18 an dem Halterahmen 16 zu ermöglichen.The holding frame 16 also has a second fitting section 42, which is designed to enable the secondary optics unit 18 to be fixed in position on the holding frame 16.

Um das Lichtmodul 10 im zusammengebauten Zustand beispielsweise in einem Scheinwerfergehäuse anzuordnen und in dem Scheinwerfergehäuse auszurichten, weist der Halterahmen 16 einen Lagerabschnitt 45 auf, der im dargestellten Beispiel als Kugelabschnitt 45 ausgebildet ist (vgl. Fig. 2). Dieser Kugelabschnitt 45 wird in einer entsprechenden Kugelpfanne im Scheinwerfergehäuse gelagert (nicht dargestellt). Der Halterahmen weist ferner als Ausrichtungsabschnitte einen ersten Anlenkvorsprung 46 und einen zweiten Anlenkvorsprung 47 auf. Diese dienen dazu, die Ausrichtung des Lichtmoduls 10 in einem Scheinwerfergehäuse einzustellen und zu verändern, insbesondere durch Verkippen oder Verschieben des Lichtmoduls 10. Beispielsweise erfolgt über den ersten Anlenkvorsprung 46 eine Vertikalausrichtung, über den zweiten Anlenkvorsprung 47 eine Horizontalausrichtung. Der erste und der zweite Anlenkvorsprung 46, 47 weisen im dargestellten Beispiel je eine durchgehende Öffnung zur Aufnahme einer Führungsstange auf, mittels welcher das Lichtmodul ausgerichtet werden kann. Die Ausrichtung kann manuell oder motorisch erfolgen. Beispielsweise kann die Ausrichtung eines bestimmten Lichtmoduls in einem Kfz motorische an die Ausrichtung anderer Lichtmodule des Kfz angepasst werden. Es ist beispielsweise möglich, die Lichtverteilungen von Fernlicht und Abblendlicht dadurch aufeinander abzustimmen, dass die Ausrichtungen der jeweiligen Lichtmodule zueinander verändert wird. Dabei kann es genügen, wenn nur die vertikale Ausrichtung motorisiert erfolgt und die horizontale Justierung beim Einbau der Lichtmoduls manuell erfolgt.In order to arrange the light module 10 in the assembled state, for example in a headlamp housing, and to align it in the headlamp housing, the holding frame 16 has a bearing section 45, which in the example shown is designed as a spherical section 45 (cf. Fig. 2 ). This ball section 45 is mounted in a corresponding ball socket in the headlight housing (not shown). The holding frame also has a first articulation projection 46 and a second articulation projection 47 as alignment sections. These serve to adjust and change the alignment of the light module 10 in a headlight housing, in particular by tilting or shifting the light module 10. For example, a vertical alignment takes place via the first articulation projection 46, and a horizontal alignment via the second articulation projection 47. In the example shown, the first and the second articulation projection 46, 47 each have a through opening for receiving a guide rod, by means of which the light module can be aligned. Alignment can be done manually or by motor. For example, the orientation of a specific light module in a motor vehicle can be adapted to the orientation of other light modules of the motor vehicle. For example, it is possible to coordinate the light distributions of high beam and low beam with one another by changing the orientations of the respective light modules to one another. It can be sufficient if only the vertical alignment is motorized and the horizontal adjustment is done manually when installing the light module.

Die Sekundäroptikeinheit 18 umfasst eine als Sammellinse ausgebildete Linseneinrichtung 48. Diese ist dazu ausgebildet, im Betrieb des Lichtmoduls 10 die sich auf der Primäroptikaustrittsfläche 36 einstellende Lichtverteilung in eine Abstrahllichtverteilung zu projizieren. Die Sekundäroptikeinheit 18 umfasst außerdem einen Linsenhalter 50, welcher einerseits zum Halten der Linseneinrichtung dient, andererseits zu einer positionsgenauen Ausrichtung der Sekundäroptikeinheit 18 beiträgt. Der Linsenhalter 50 ist rahmenartig in der Art eines zweiseitig offenen Hohlkörpers ausgebildet, so dass im zusammengebauten Zustand des Lichtmoduls 10 der Lichtweg ausgehend von der Primäroptikaustrittsfläche 36 durch den Halterahmen 16 und durch den Linsenhalter 50 frei bleibt.The secondary optics unit 18 comprises a lens device 48 designed as a converging lens. This is designed to project the light distribution that arises on the primary optics exit surface 36 into a radiation light distribution during operation of the light module 10. The secondary optics unit 18 comprises In addition, a lens holder 50, which on the one hand serves to hold the lens device, on the other hand contributes to an accurate position of the secondary optics unit 18. The lens holder 50 is designed like a frame in the manner of a hollow body open on both sides, so that in the assembled state of the light module 10, the light path from the primary optics exit surface 36 through the holding frame 16 and through the lens holder 50 remains clear.

Der der Linseneinrichtung 48 abgewandte Abschnitt des Linsenhalters 50 ist als Passabschnitt 52 ausgebildet. Hierzu weitet sich der Linsenhalter 50 im Bereich des Passabschnitts 52 kragenartig auf, so dass eine passgenaue Anlage des zweiten Passabschnitts 42 des Halterahmens 16 an dem Passabschnitt 52 des Linsenhalters 50 möglich ist.The section of the lens holder 50 facing away from the lens device 48 is designed as a fitting section 52. For this purpose, the lens holder 50 widens like a collar in the region of the fitting section 52, so that the second fitting section 42 of the holding frame 16 can be fitted precisely against the fitting section 52 of the lens holder 50.

Die Sekundäroptikeinheit 18 weist ferner ein Zierelement 54 auf, welches rahmenartig ausgebildet ist und derart an dem Linsenhalter 50 angeordnet ist, dass es die Linseneinrichtung 48 rahmenartig umfasst.The secondary optics unit 18 also has a decorative element 54, which is designed like a frame and is arranged on the lens holder 50 in such a way that it surrounds the lens device 48 like a frame.

Um die Endmontage des Lichtmoduls 10 zu ermöglichen, ist eine erste Befestigungseinrichtung zum positionsgenauen Befestigen der Primäroptikeinheit 14 an der Lichtquelleneinheit 12 vorgesehen. Diese erste Befestigungseinrichtung umfasst vorspringende (insbesondere bolzenartige) Befestigungsabschnitte 56, welche an der Lichtquelleneinheit 12 angeordnet sind. Die Befestigungsabschnitte 56 erstrecken sich über die Frontseite 24 der Lichtquelleneinheit 12 in Richtung der Primäroptikeinheit 14.In order to enable the final assembly of the light module 10, a first fastening device is provided for fastening the primary optics unit 14 to the light source unit 12 in a precise position. This first fastening device comprises projecting (in particular bolt-like) fastening sections 56, which are arranged on the light source unit 12. The fastening sections 56 extend over the front side 24 of the light source unit 12 in the direction of the primary optics unit 14.

Die Primäroptikeinheit 14 hat entsprechend zugeordnete Befestigungsabschnitte 58, welche als zylindrische Ausnehmungen derart ausgebildet sind, dass die Befestigungsabschnitte 56 in die Zylinderausnehmungen 58 eingreifen können (vergleiche Figur 1). Über die aufeinander abgestimmt ausgebildeten Befestigungsabschnitte 56 und 58 wird eine positionsgenaue und justierbare Befestigung der Primäroptikeinheit 14 an der Lichtquelleneinheit 12 ermöglicht.The primary optics unit 14 has correspondingly assigned fastening sections 58, which are designed as cylindrical recesses such that the fastening sections 56 can engage in the cylinder recesses 58 (cf. Figure 1 ). Via the mutually coordinated fastening sections 56 and 58, a positionally precise and adjustable fastening of the primary optics unit 14 to the light source unit 12 is made possible.

Die Endmontage des Lichtmoduls 10 erfolgt außerdem über eine zweite Befestigungseinrichtung, welche zur positionsgenauen Befestigung der Sekundäroptikeinheit 18 in Bezug auf die Primäroptikeinheit 14 ausgebildet ist. Zu der zweiten Befestigungseinrichtung trägt zunächst der Halterahmen 16 bei. Dieser nimmt mit seinem ersten Passabschnitt 40 die Primäroptikeinheit 14 insbesondere zusammen mit der Lichtquelleneinheit 12 auf. Der zweite Passabschnitt 42 des Halterahmens 16 sieht eine Ausnehmung 60 vor, welche als Befestigungsmittel für die Sekundäroptikeinheit 18 wirkt. Die Ausnehmung 60 ist hierzu derart ausgebildet, dass ein stiftartiger Vorsprung 62 des Passabschnitts 52 am Linsenhalter 50 in die Ausnehmung 60 eingreifen kann. Dadurch ist sowohl eine positionsgenaue Ausrichtung, als auch eine Befestigung der Sekundäroptikeinheit 18 möglich. Auf diese Weise können bei dem Lichtmodul 10 die eingangs erläuterten störenden Dispersionseffekte (zum Beispiel Bildung eines Farbsaums) durch genaue Ausrichtung der Linseneinrichtung in Bezug auf die Primäroptikaustrittsfläche 36 weitgehend verringert werden.The final assembly of the light module 10 also takes place via a second fastening device which is designed for the positionally accurate fastening of the secondary optics unit 18 in relation to the primary optics unit 14. The holding frame 16 first contributes to the second fastening device. With its first fitting section 40, the latter accommodates the primary optics unit 14, in particular together with the light source unit 12. The second fitting section 42 of the holding frame 16 provides a recess 60 which acts as a fastening means for the secondary optics unit 18. For this purpose, the recess 60 is designed such that a pin-like projection 62 of the fitting section 52 on the lens holder 50 can engage in the recess 60. This enables both an exact positional alignment and an attachment of the secondary optics unit 18. In this way, the disturbing dispersion effects (for example formation of a color fringe) explained at the outset in the light module 10 can be largely reduced by precisely aligning the lens device with respect to the primary optics exit surface 36.

Mit dem in der Figur 3 gezeigten Lichtmodul 10 kann eine Abstrahllichtverteilung in eine Hauptabstrahlrichtung 70 ausgestrahlt werden. Die Justierung und relative Ausrichtung der einzelnen Baueinheiten (insbesondere 12, 14, 16, 18) zueinander, bleibt auch bei Einbau des Lichtmoduls 10 in ein Scheinwerfergehäuse erhalten. Der optische Eintritt bei Blick in das Scheinwerfergehäuse wird dann im Wesentlichen durch das Zierelement 54 bestimmt.With that in the Figure 3 In the light module 10 shown, a radiation light distribution can be emitted in a main emission direction 70. The adjustment and relative alignment of the individual structural units (in particular 12, 14, 16, 18) with respect to one another is retained even when the light module 10 is installed in a headlight housing. The optical entry when looking into the headlight housing is then essentially determined by the decorative element 54.

Claims (9)

  1. A light module (10) for motor vehicle headlights,
    - having a light source unit (12) which has a plurality of semiconductor light sources (26), arranged in groups for emitting light,
    - having a primary optical unit (14), which has optical elements with light input surfaces for coupling] in the light that can be coupled into the optical element as well as light exit faces (34) for coupling light from the optical element through the light exit surface (34),
    - having a secondary optical unit (18), which has a lens device (48), for projecting the light distribution onto the light exit faces (34) that has been established during operation of the light module (10) into an emission light distribution of the light module (10), and a lens holder (50) for holding the lens device (48),
    wherein the light source unit (12), the primary optical unit (14), and the secondary optical unit (18) are embodied as premounted units, which for the final assembly of the light module (10) are joined together along a mounting direction (20);
    wherein a first securing device (56, 58) for positionally accurately securing the primary optical unit (14) and of the light source unit (12) to one another is provided;
    and wherein a second securing device (60, 62) is provided, which is arranged for securing the secondary optical unit (10) positionally accurately relative to the primary optical unit (14);
    wherein the second securing device (60, 62) includes a holder frame (16), which is embodied for being located between the primary optical unit (14) and the secondary optical unit (18);
    and wherein the primary optical unit (14) is received between the holder frame (16) and the light source unit (12), characterized in that
    the holder frame (16) has a housing securing portion for securing the light module in a headlight housing.
  2. The light module (10) of claim 1, characterized in that the holder frame (16) has a bearing portion (45), which is embodied as a spherical portion (45).
  3. The light module (10) of claim 2, characterized in that the holder frame (16) has, as alignment portions, a first articulated projection (46) and a second articulated projection (47), which serve to adjust and vary the alignment of the light module (10) in a headlight housing, in particular by tilting or shifting the light module (10) .
  4. The light module (10) of one of the foregoing claims, characterized in that the first securing device (56, 58) includes a securing portion (56) of the light source unit (12) and an associated securing portion (58) of the primary optical unit (14).
  5. The light module (10) of one of the foregoing claims, characterized in that the holder frame (16) has a first fitting portion (40) for connection to the primary optical unit (14) as well as a second fitting portion (42) for positionally accurate securing of the secondary optical unit (18).
  6. The light module (10) of one of the foregoing claims, characterized in that the second securing device (60, 62) is embodied such that the secondary optical unit (18) can be detached and then attached again.
  7. The light module (10) of one of the foregoing claims, characterized in that the light source unit (12) includes a control device which is embodied such that the semiconductor light sources (26) can be selected independently of one another for emitting light.
  8. The light module (10) of one of the foregoing claims, characterized in that the optical elements are furnished by a primary optical element (32), which has a plurality of optical fiber portions that can be each associated with one semiconductor light source (26), and each optical fiber portion has a light input surface.
  9. The light module (10) of one of the foregoing claims, characterized in that the secondary optical unit (18) has a fitting portion (52) for securing it positionally accurately and a decorative element (54) which at least intermittently surrounds the lens device (48) and which in the assembled state of the light module (10) is visible at least intermittently to someone looking at the secondary optical unit (18).
EP13172375.1A 2012-08-03 2013-06-18 Light module Active EP2693106B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012213844.7A DE102012213844B4 (en) 2012-08-03 2012-08-03 Light module for vehicle headlights with two optical units and associated fastening devices

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EP2693106A2 EP2693106A2 (en) 2014-02-05
EP2693106A3 EP2693106A3 (en) 2015-12-23
EP2693106B1 true EP2693106B1 (en) 2020-03-04

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Publication number Publication date
CN103574474A (en) 2014-02-12
DE102012213844B4 (en) 2021-01-28
CN103574474B (en) 2017-06-30
DE102012213844A1 (en) 2014-02-06
EP2693106A3 (en) 2015-12-23
EP2693106A2 (en) 2014-02-05

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