EP4086506A1 - Lighting device for a motor vehicle and manufacturing method - Google Patents

Lighting device for a motor vehicle and manufacturing method Download PDF

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Publication number
EP4086506A1
EP4086506A1 EP22171541.0A EP22171541A EP4086506A1 EP 4086506 A1 EP4086506 A1 EP 4086506A1 EP 22171541 A EP22171541 A EP 22171541A EP 4086506 A1 EP4086506 A1 EP 4086506A1
Authority
EP
European Patent Office
Prior art keywords
light
lighting device
exit surface
optics
secondary optics
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP22171541.0A
Other languages
German (de)
French (fr)
Other versions
EP4086506B1 (en
Inventor
Michael Ritter
Daniel Rülke
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
Marelli Automotive Lighting Reutlingen Germany 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
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Publication of EP4086506A1 publication Critical patent/EP4086506A1/en
Application granted granted Critical
Publication of EP4086506B1 publication Critical patent/EP4086506B1/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
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/27—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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • F21S41/153—Light emitting diodes [LED] arranged in one or more lines arranged in a matrix
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/285—Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • F21S43/145—Surface emitters, e.g. organic light emitting diodes [OLED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/26—Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/30—Hazard lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/55—Daytime running lights [DRL]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • F21Y2115/15—Organic light-emitting diodes [OLED]

Definitions

  • the invention relates to a lighting device and a method for producing components of the lighting device.
  • LED displays OLEDs and microLEDs
  • signal light functions such as for example flashing lights or daytime running lights.
  • the known systems are two-dimensional due to their design and can only follow a sweep or inclination of a headlight design to a limited extent. Furthermore, a high number of liquid crystal filter layers required reduces the efficiency of such systems.
  • the object of the present invention is to provide a lighting device that allows flexible adaptation to a sweep and/or inclination of a headlight design, and can provide required statutory intensity values of a respective signal light function, while at the same time requiring little installation space, in particular a small installation depth .
  • the lighting device comprises a plurality of light sources, wherein the light sources can each be activated individually or at least one or more light source groups, comprising a subset of the light sources, can each be activated individually, with a plurality of primary optics assigned to a respective light source for bundling the light emitted by the respective light source , and a secondary optics device for imaging the bundled light in an illumination plane with a plurality of light entry surfaces assigned to a respective light source and a light exit surface, with a grating device for segmenting the light exiting via the light exit surface being provided in the light exit direction after the light exit surface of the secondary optics device.
  • the light sources are preferably light-emitting diodes, LEDs. However, the light sources can also be OLEDs or include microLEDs.
  • the light sources can preferably be activated individually, which includes in particular being able to be switched on, switched off and/or dimmed. Alternatively or additionally, it can also be provided that one or more light source groups, comprising a subset of the light sources, can each be activated individually.
  • the primary optics are preferably converging lenses. However, other optical elements, such as reflectors or attachment optics, in particular catadioptric attachment optics, can also be provided. Each primary optics bundles the light emitted by a light source, in particular in a preferred direction.
  • the preferred direction is, for example, a direction between the normal of the plane in which the light source is arranged and a direction in or against the direction of travel of a motor vehicle.
  • the secondary optics device is at least partially transparent, in particular made of a material comprising plastic.
  • the secondary optics device breaks the light beams entering via the light entry surfaces in a desired direction on the light exit surface, which is in particular flat.
  • the desired direction includes, in particular as a function of the lamp function that can be generated, for example a direction in or against the direction of travel of a motor vehicle, or a direction to one side of the motor vehicle.
  • the grating device segments this across the light exit surface of the secondary optics device exiting light.
  • the lattice device comprises in particular a plurality of lattice segments, the individual lattice segments being separated from one another by webs arranged between them.
  • a respective grid segment is preferably assigned to a respective light source.
  • the grating device is not transparent, in particular made of a material comprising plastic.
  • the tolerance for positioning is in the order of magnitude of the width of the webs of the grating device.
  • the light entry surfaces of the secondary optics device are arranged in a stepped manner. This results in an overall light entry surface with a plurality of steps, with each step forming the light entry surface for the light from a respective light source.
  • the stepped light entry surfaces deflect the entering light in such a way that the entering light can be refracted in the desired direction at the light exit surface.
  • the light bundles are preferably already oriented by the primary optics in such a way that the light entry surface can be approximately perpendicular to the rays of the light bundles.
  • the secondary optics device and the grating device are formed as an integral component.
  • the integral component then comprises the, in particular, transparent secondary optics device and the, in particular, non-transparent grating device.
  • the component is manufactured in a multi-component, in particular two-component injection molding process.
  • the secondary optics device includes in particular a flat light exit surface. The flat light exit surface makes it easier for the grating device to be molded onto it.
  • At least one carrier device is provided, with the light sources or a subset of the light sources being arranged on the carrier device.
  • the carrier device is in particular a circuit board.
  • the carrier device comprises a rigid or flexible material.
  • the circuit board is flat in one plane. In this way, a small overall depth is required.
  • a respective primary optics is a separate component.
  • several primary optics can form a common component.
  • the primary optics are arranged on or at the carrier device.
  • the light exit surface of the secondary optics device is arranged parallel to a plane of the carrier device.
  • a pane in particular a transparent pane, is arranged after the grating device in the light exit direction.
  • the positioning of the disc to the grating device is relatively uncritical in relation to the positioning of the primary optics to the light sources and/or the secondary optics device together with the grating device to the primary optics.
  • the light exiting via the light exit surface of the secondary optics device has previously been directed accordingly.
  • an air gap that is as small and as regular as possible, on the order of up to 0.5 mm, is desirable in order to avoid aberrations and blooming.
  • the pane is in particular clear and/or colorless and/or colored or vaporized, in particular partially vaporized and/or lasered and/or printed, in particular partially printed.
  • the pane comprises micro-optical elements, in particular on a light exit surface.
  • the micro-optical elements may be necessary, for example, to generate a light distribution in accordance with legal requirements.
  • the micro-optical elements are, for example, scattering optics, in particular in the form of cushion optics formed on a light exit surface of the pane.
  • the number of light sources and thus the number of grating segments is in particular at least 50, preferably 100 to 1000, in particular up to 5000, or more.
  • the lighting device according to the invention is designed, for example, to generate a signal light function, in particular a visual light function and/or a daytime running light function.
  • the lighting device according to the invention generates the legally required intensity values.
  • a corresponding lighting function can be generated over a very large angular range.
  • the lighting device can therefore be used in motor vehicle lights with a sweep and/or inclination of up to 90°.
  • the secondary optics device and the grating device are manufactured as an integral component.
  • the integral component then comprises the secondary optics device, which is in particular transparent, and the grating device, which is in particular non-transparent.
  • the stepped light entry surfaces are formed in such a way that all steps require the same demolding direction.
  • the carrier device 10 is in particular a circuit board.
  • the carrier device 10 comprises in particular a rigid or flexible material.
  • a plurality of light sources 12 are arranged on the carrier device 10 .
  • the light sources 12 are, for example, light-emitting diodes, LEDs.
  • the light sources 12 can preferably be activated individually, ie in particular can be switched on, switched off and/or dimmed. Alternatively or additionally, it can also be provided that one or more light source groups, comprising a subset of the light sources 12, can each be activated individually.
  • the lighting device further includes a plurality of primary optics 14 assigned to a respective light source 12 for bundling the light emitted by the respective light source 12 .
  • the primary optics 14 are designed, for example, as converging lenses. Each primary optics 14 bundles the light emitted by a light source 12, in particular in a preferred direction.
  • the preferred direction is, for example, a direction between the normal of the plane in which the light source 12 is arranged, ie the plane of the carrier device 10, and a direction in or against the direction of travel of a motor vehicle.
  • a respective primary optics 14 is a separate component. According to an alternative embodiment that is not shown, several primary optics 14 can form a common component.
  • a respective primary optics 14 in particular the focal point of the primary optics 14, to a respective light source 12
  • a high degree of accuracy is required in particular, with tolerances being in the range of 0.1 mm to 0.2 mm in particular.
  • the required positioning accuracy must therefore be guaranteed.
  • the primary optics 14 are arranged on or at the carrier device 10 .
  • the lighting device further includes a Secondary optics device 16 for imaging the light bundled by the primary optics 14 in an illumination plane.
  • the secondary optics device 16 comprises a plurality of light entry surfaces 18 assigned to a respective light source 12.
  • the secondary optics device 16 is at least partially transparent, in particular made of a material comprising plastic.
  • the secondary optics device 16 breaks the light bundles entering via the light entry surfaces 18 in a desired direction on a light exit surface 20 that is in particular flat.
  • the desired direction includes, in particular as a function of the lamp function that can be generated, for example a direction in or against the direction of travel of a motor vehicle, or a direction to one side of the motor vehicle.
  • the light entry surfaces 18 of the secondary optics device 16 are arranged in a stepped manner. This results in an overall light entry surface 22 with a plurality of steps, with each step forming the light entry surface 18 for the light from a respective light source.
  • the stepped light entry surfaces 18 deflect the entering light in such a way that the entering light can be refracted in the desired direction at the light exit surface 20 .
  • the light beams are already oriented by the primary optics 14 so that the Light entry surface 18 can be approximately perpendicular to the rays of the light beam.
  • a grating device 26 for segmenting the light exiting via the light exit surface 20 is provided in the light exit direction, cf. arrow 24 , after the light exit surface 20 of the secondary optics device 16 .
  • the grating device 26 segments the light exiting via the light exit surface of the secondary optics device.
  • the lattice device 26 comprises, in particular, a plurality of lattice segments 28, the individual lattice segments 28 being separated from one another by webs 30 arranged between them.
  • the lattice device 26 extends, for example, in one plane, with a type of three-dimensional lattice being given by the thickness or width of the webs 30 .
  • the grating device 26 itself can be arched or curved.
  • the shape of the grating device 26 is created by projecting a two-dimensional grating onto a free-form surface extending in space, in particular a section of a spherical surface.
  • a respective grid segment 28 is preferably assigned to a respective light source 12 .
  • the lattice device 26, that is to say the webs 30 of the lattice device 26, are in particular not transparent, in particular made of a material comprising plastic.
  • the tolerance for positioning is in the order of magnitude of the width of the webs 30 of the grating device 26.
  • the secondary optics device 16 and the grating device 26 are formed as an integral component 32 .
  • the integral component 32 then includes the in particular transparent secondary optics device 16 and the in particular non-transparent grating device 26.
  • the component 32 is manufactured in a multi-component, in particular two-component injection molding process.
  • the secondary optics device 26 includes, in particular, a flat light exit surface.
  • the flat light exit surface 26 promotes spraying of the grating device 26 thereon.
  • the stepped light entry surfaces are formed in such a way that all steps require the same demolding direction.
  • the light exit surface 20 of the secondary optics device 16 is arranged parallel to a plane of the carrier device 10 .
  • a pane 34 is arranged after the grating device 26 in the light exit direction 24 .
  • the positioning of the disc 34 to the grating device 26 is in relation to Positioning of the primary optics 14 to the light sources 12 and/or the secondary optics device 16 together with the grating device 26 to the primary optics 14 is relatively uncritical.
  • the light exiting via the light exit surface 20 of the secondary optics device 16 has previously been directed accordingly.
  • an air gap 36 of the order of magnitude of up to 0.5 mm which is as small and as regular as possible is desirable in order to avoid aberrations and blooming.
  • the pane 34 comprises micro-optical elements, in particular on a light exit surface 38 .
  • the micro-optical elements can be required, for example, in order to generate a light distribution in accordance with legal requirements.
  • the micro-optical elements are, for example, scattering optics, in particular in the form of cushion optics formed on a light exit surface 38 of the pane 34 .
  • the number of light sources 12 shown, and the number of primary optics 14 and number of grating segments 28 is only an example. In the lighting device according to the invention, it is provided that the number of light sources 12 and thus the number of primary optics 14 and grating segments 28 is in particular at least 50, preferably 100 to 1000, in particular up to 5000, or more.
  • the grating segments 28 can be arranged in rows and rows in any number. is preferred for example, a number of seven to sixteen lines.

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

Abstract

Die Erfindung betrifft eine Beleuchtungseinrichtung, insbesondere für ein Kraftfahrzeug, umfassend eine Mehrzahl von Lichtquellen (12), mit einer Mehrzahl an einer jeweiligen Lichtquelle (12) zugeordneten Primäroptiken (14) zum Bündeln des von der jeweiligen Lichtquelle (12) ausgesandten Lichts, und eine Sekundäroptikvorrichtung (16) mit einer Mehrzahl an einer jeweiligen Lichtquelle (12) zugeordneten Lichteintrittsflächen (18) und einer Lichtaustrittsfläche (20), dadurch gekennzeichnet, dass in Lichtaustrittsrichtung (24) nach der Lichtaustrittsfläche (20) der Sekundäroptikvorrichtung (16) eine Gittervorrichtung (26) zur Segmentierung des über die Lichtaustrittsfläche (20) austretenden Lichts vorgesehen ist.The invention relates to a lighting device, in particular for a motor vehicle, comprising a plurality of light sources (12), with a plurality of primary optics (14) assigned to a respective light source (12) for bundling the light emitted by the respective light source (12), and one Secondary optics device (16) having a plurality of light entry surfaces (18) assigned to a respective light source (12) and a light exit surface (20), characterized in that in the light exit direction (24) after the light exit surface (20) of the secondary optics device (16), a grating device (26 ) is provided for segmenting the light exiting via the light exit surface (20).

Description

Die Erfindung betrifft eine Beleuchtungseinrichtung und ein Verfahren zum Herstellen von Komponenten der Beleuchtungseinrichtung.The invention relates to a lighting device and a method for producing components of the lighting device.

Zum Erzeugen von Signallichtfunktionen, wie beispielsweise Blinklicht oder Tagfahrlicht, ist aus dem Stand der Technik die Verwendung von LED-Displays, OLEDs und MikroLEDs bekannt. Die bekannten Systeme sind bauartbedingt zweidimensional und können so einer Pfeilung oder Neigung eines Scheinwerfer-Designs nur begrenzt folgen. Im Übrigen verringert eine hohe Anzahl an nötigen Flüssigkristallfilterschichten die Effizienz solcher Systeme.The use of LED displays, OLEDs and microLEDs is known from the prior art for generating signal light functions, such as for example flashing lights or daytime running lights. The known systems are two-dimensional due to their design and can only follow a sweep or inclination of a headlight design to a limited extent. Furthermore, a high number of liquid crystal filter layers required reduces the efficiency of such systems.

Aufgabe der vorliegenden Erfindung ist es, eine Beleuchtungseinrichtung bereitzustellen, die eine flexible Anpassung an eine Pfeilung und/oder Neigung eines Scheinwerfer-Designs ermöglicht, und bei erforderlichen gesetzlichen Intensitätswerte einer jeweiligen Signallichtfunktion bereitstellen kann, und gleichzeitig wenig Bauraum, insbesondere eine geringe Bautiefe, beansprucht.The object of the present invention is to provide a lighting device that allows flexible adaptation to a sweep and/or inclination of a headlight design, and can provide required statutory intensity values of a respective signal light function, while at the same time requiring little installation space, in particular a small installation depth .

Dies wird gelöst durch eine Beleuchtungsrichtung gemäß Anspruch 1.This is solved by an illumination device according to claim 1.

Die erfindungsgemäße Beleuchtungseinrichtung umfasst eine Mehrzahl von Lichtquellen, wobei die Lichtquellen jeweils einzeln oder zumindest eine oder mehrere Lichtquellengruppen, umfassend eine Teilmenge der Lichtquellen, jeweils einzeln aktivierbar sind, mit einer Mehrzahl an einer jeweiligen Lichtquelle zugeordneten Primäroptiken zum Bündeln des von der jeweiligen Lichtquelle ausgesandten Lichts, und eine Sekundäroptikvorrichtung zum Abbilden des gebündelten Lichts in eine Beleuchtungsebene mit einer Mehrzahl an einer jeweiligen Lichtquelle zugeordneten Lichteintrittsflächen und einer Lichtaustrittsfläche, wobei in Lichtaustrittsrichtung nach der Lichtaustrittsfläche der Sekundäroptikvorrichtung eine Gittervorrichtung zur Segmentierung des über die Lichtaustrittsfläche austretenden Lichts vorgesehen ist.The lighting device according to the invention comprises a plurality of light sources, wherein the light sources can each be activated individually or at least one or more light source groups, comprising a subset of the light sources, can each be activated individually, with a plurality of primary optics assigned to a respective light source for bundling the light emitted by the respective light source , and a secondary optics device for imaging the bundled light in an illumination plane with a plurality of light entry surfaces assigned to a respective light source and a light exit surface, with a grating device for segmenting the light exiting via the light exit surface being provided in the light exit direction after the light exit surface of the secondary optics device.

Bei den Lichtquellen handelt es sich vorzugsweise Leuchtdioden, LEDs. Die Lichtquellen können aber auch OLEDs oder MikroLEDs umfassen. Die Lichtquellen sind vorzugsweise einzeln aktivierbar, das umfasst insbesondere einschaltbar, ausschaltbar und/oder dimmbar. Alternativ oder ergänzend kann auch vorgesehen sein, dass eine oder mehrere Lichtquellengruppen, umfassend eine Teilmenge der Lichtquellen, jeweils einzeln aktivierbar sind.The light sources are preferably light-emitting diodes, LEDs. However, the light sources can also be OLEDs or include microLEDs. The light sources can preferably be activated individually, which includes in particular being able to be switched on, switched off and/or dimmed. Alternatively or additionally, it can also be provided that one or more light source groups, comprising a subset of the light sources, can each be activated individually.

Bei den Primäroptiken handelt es sich vorzugsweise um Sammellinsen. Es können aber auch andere optische Elemente, wie beispielsweise Reflektoren oder Vorsatzoptiken, insbesondere katadioptrische Vorsatzoptiken, vorgesehen werden. Jede Primäroptik bündelt das von einer Lichtquelle ausgesandte Licht, insbesondere in eine Vorzugsrichtung. Die Vorzugsrichtung ist beispielsweise eine Richtung zwischen der Normalen der Ebene, in der die Lichtquelle angeordnet ist, und eine Richtung in oder entgegen der Fahrtrichtung eines Kraftfahrzeugs.The primary optics are preferably converging lenses. However, other optical elements, such as reflectors or attachment optics, in particular catadioptric attachment optics, can also be provided. Each primary optics bundles the light emitted by a light source, in particular in a preferred direction. The preferred direction is, for example, a direction between the normal of the plane in which the light source is arranged and a direction in or against the direction of travel of a motor vehicle.

Die Sekundäroptikvorrichtung ist zumindest teilweise transparent, insbesondere aus einem Material umfassend Kunststoff. Die Sekundäroptikvorrichtung bricht die über die Lichteintrittsflächen eintretenden Lichtbündel an der, insbesondere eben ausgebildeten, Lichtaustrittsfläche in eine gewünschte Richtung. Die gewünschte Richtung umfasst, insbesondere in Abhängigkeit der erzeugbaren Leuchtenfunktion, beispielsweise eine Richtung in oder entgegen der Fahrtrichtung eines Kraftfahrzeugs, oder eine Richtung zu einer Seite des Kraftfahrzeugs.The secondary optics device is at least partially transparent, in particular made of a material comprising plastic. The secondary optics device breaks the light beams entering via the light entry surfaces in a desired direction on the light exit surface, which is in particular flat. The desired direction includes, in particular as a function of the lamp function that can be generated, for example a direction in or against the direction of travel of a motor vehicle, or a direction to one side of the motor vehicle.

Die Gittervorrichtung segmentiert das über die Lichtaustrittsfläche der Sekundäroptikvorrichtung austretende Licht. Die Gittervorrichtung umfasst insbesondere eine Mehrzahl an Gittersegmenten, wobei die einzelnen Gittersegmente durch dazwischen angeordnete Stege voneinander getrennt sind. Vorzugsweise ist einer jeweiligen Lichtquelle ein jeweiliges Gittersegment zugeordnet.The grating device segments this across the light exit surface of the secondary optics device exiting light. The lattice device comprises in particular a plurality of lattice segments, the individual lattice segments being separated from one another by webs arranged between them. A respective grid segment is preferably assigned to a respective light source.

Die Gittervorrichtung ist insbesondere nicht transparent, insbesondere aus einem Material umfassend Kunststoff.In particular, the grating device is not transparent, in particular made of a material comprising plastic.

Beim Positionieren der Primäroptiken und der Sekundäroptik zueinander liegt die Toleranz zur Positionierung im Bereich der Größenordnung der Breite der Stege der Gittervorrichtung.When positioning the primary optics and the secondary optics relative to one another, the tolerance for positioning is in the order of magnitude of the width of the webs of the grating device.

Gemäß einer vorteilhaften Ausführungsform ist vorgesehen, dass die Lichteintrittsflächen der Sekundäroptikvorrichtung stufenförmig angeordnet sind. Somit ergibt sich eine Gesamtlichteintrittsfläche mit einer Mehrzahl an Stufen, wobei eine jeweilige Stufe die Lichteintrittsfläche für das Licht einer jeweiligen Lichtquelle bildet. Die stufenförmigen Lichteintrittsflächen lenken das eintretende Licht derart um, dass das eintretende Licht an der Lichtaustrittfläche in die gewünschte Richtung gebrochen werden kann. Vorzugsweise sind die Lichtbündel durch die Primäroptiken bereits so orientiert, dass die Lichteintrittsfläche in etwa senkrecht zu den Strahlen der Lichtbündel stehen kann.According to an advantageous embodiment, it is provided that the light entry surfaces of the secondary optics device are arranged in a stepped manner. This results in an overall light entry surface with a plurality of steps, with each step forming the light entry surface for the light from a respective light source. The stepped light entry surfaces deflect the entering light in such a way that the entering light can be refracted in the desired direction at the light exit surface. The light bundles are preferably already oriented by the primary optics in such a way that the light entry surface can be approximately perpendicular to the rays of the light bundles.

Gemäß einer bevorzugten Ausführungsform ist vorgesehen, dass die Sekundäroptikvorrichtung und die Gittervorrichtung als ein integrales Bauteil ausgebildet sind. Das integrale Bauteil umfasst dann die insbesondere transparente Sekundäroptikvorrichtung und die insbesondere nicht transparente Gittervorrichtung. Beispielsweise wird das Bauteil in einem Mehrkomponenten, insbesondere Zweikomponenten-Spritzgussverfahren, gefertigt. Die Sekundäroptikvorrichtung umfasst insbesondere eine ebene Lichtaustrittsfläche. Die ebene Lichtaustrittsfläche begünstigt, dass die Gittervorrichtung daran angespritzt werden kann.According to a preferred embodiment it is provided that the secondary optics device and the grating device are formed as an integral component. The integral component then comprises the, in particular, transparent secondary optics device and the, in particular, non-transparent grating device. For example, the component is manufactured in a multi-component, in particular two-component injection molding process. The secondary optics device includes in particular a flat light exit surface. The flat light exit surface makes it easier for the grating device to be molded onto it.

Gemäß einer bevorzugten Ausführungsform ist vorgesehen, dass wenigstens eine Trägervorrichtung vorgesehen ist, wobei die Lichtquellen oder eine Teilmenge der Lichtquellen auf der Trägervorrichtung angeordnet sind. Die Trägervorrichtung ist insbesondere eine Platine. Die Trägervorrichtung umfasst insbesondere ein starres oder flexibles Material. Vorteilhafterweise ist die Platine flach in einer Ebene ausgebildet. Auf diese Weise wird eine geringe Bautiefe beansprucht.According to a preferred embodiment, at least one carrier device is provided, with the light sources or a subset of the light sources being arranged on the carrier device. The carrier device is in particular a circuit board. In particular, the carrier device comprises a rigid or flexible material. Advantageously, the circuit board is flat in one plane. In this way, a small overall depth is required.

Es kann vorgesehen sein, dass eine jeweilige Primäroptik ein separates Bauteil ist. Alternativ können mehrere Primäroptiken ein gemeinsames Bauteil bilden. Beim Positionieren einer jeweiligen Primäroptik, insbesondere des Fokuspunkts der Primäroptik, zu einer jeweiligen Lichtquelle ist insbesondere eine hohe Genauigkeit erforderlich, wobei Toleranzen insbesondere im Bereich von 0,1 mm bis 0,2 mm liegen. Beim Zusammenfassen von mehreren Primäroptiken zu einem gemeinsamen Bauteil muss daher die erforderliche Positioniergenauigkeit gewährleistet sein.It can be provided that a respective primary optics is a separate component. Alternatively, several primary optics can form a common component. When positioning a respective primary optics, in particular the focal point of the primary optics, to a respective light source, a high level of accuracy is required in particular, with tolerances being in the range of 0.1 mm to 0.2 mm in particular. When combining multiple primary optics into a common component must therefore required positioning accuracy must be guaranteed.

Gemäß einer vorteilhaften Ausführungsform ist vorgesehen, dass die Primäroptiken auf oder an der Trägervorrichtung angeordnet sind.According to an advantageous embodiment, it is provided that the primary optics are arranged on or at the carrier device.

Gemäß einer bevorzugten Ausführungsform ist vorgesehen, dass die Lichtaustrittsfläche der Sekundäroptikvorrichtung parallel zu einer Ebene der Trägervorrichtung angeordnet ist.According to a preferred embodiment, it is provided that the light exit surface of the secondary optics device is arranged parallel to a plane of the carrier device.

Gemäß einer vorteilhaften Ausführungsform ist vorgesehen, dass in Lichtaustrittsrichtung nach der Gittervorrichtung eine, insbesondere transparente, Scheibe angeordnet ist. Die Positionierung der Scheibe zur Gittervorrichtung ist im Verhältnis zur Positionierung der Primäroptiken zu den Lichtquellen und/oder der Sekundäroptikvorrichtung zusammen mit der Gittervorrichtung zu den Primäroptiken relativ unkritisch. Das über die Lichtaustrittsfläche der Sekundäroptikvorrichtung austretende Licht wurde zuvor entsprechend gerichtet. Ein möglichst kleiner und möglichst regelmäßiger Luftspalt in der Größenordnung von bis zu 0,5 mm ist jedoch erstrebenswert, um Abbildungsfehler und Überstrahlen zu vermeiden. Die Scheibe ist insbesondere klar und/oder farblos und/oder mit einer Färbung oder auch bedampft, insbesondere teilbedampft und/oder freigelasert und/oder bedruckt, insbesondere teilweise bedruckt.According to an advantageous embodiment, it is provided that a pane, in particular a transparent pane, is arranged after the grating device in the light exit direction. The positioning of the disc to the grating device is relatively uncritical in relation to the positioning of the primary optics to the light sources and/or the secondary optics device together with the grating device to the primary optics. The light exiting via the light exit surface of the secondary optics device has previously been directed accordingly. However, an air gap that is as small and as regular as possible, on the order of up to 0.5 mm, is desirable in order to avoid aberrations and blooming. The pane is in particular clear and/or colorless and/or colored or vaporized, in particular partially vaporized and/or lasered and/or printed, in particular partially printed.

Gemäß einer vorteilhaften Ausführungsform ist vorgesehen, dass die Scheibe, insbesondere auf einer Lichtaustrittsfläche, mikrooptische Elemente umfasst. Die mikrooptischen Elemente können beispielsweise erforderlich sein, um eine Lichtverteilung entsprechend gesetzlicher Anforderungen zu erzeugen. Die mikrooptischen Elemente sind beispielsweise Streuoptiken, insbesondere in Form von auf einer Lichtaustrittsfläche der Scheibe ausgebildeten Kissenoptiken.According to an advantageous embodiment, it is provided that the pane comprises micro-optical elements, in particular on a light exit surface. the micro-optical elements may be necessary, for example, to generate a light distribution in accordance with legal requirements. The micro-optical elements are, for example, scattering optics, in particular in the form of cushion optics formed on a light exit surface of the pane.

Die Anzahl der Lichtquellen und damit Anzahl der Gittersegmente beträgt insbesondere wenigstens 50, vorzugsweise 100 bis 1000, insbesondere bis 5000, oder mehr.The number of light sources and thus the number of grating segments is in particular at least 50, preferably 100 to 1000, in particular up to 5000, or more.

Die erfindungsgemäße Beleuchtungseinrichtung ist beispielsweise zum Erzeugen einer Signallichtfunktion, insbesondere einer Blicklichtfunktion und/oder einer Tagfahrlichtfunktion ausgebildet. Die erfindungsgemäße Beleuchtungseinrichtung erzeugt die gesetzlich geforderten Intensitätswerte.The lighting device according to the invention is designed, for example, to generate a signal light function, in particular a visual light function and/or a daytime running light function. The lighting device according to the invention generates the legally required intensity values.

Vorteilhafterweise kann mit der erfindungsgemäßen Beleuchtungseinrichtung eine entsprechenden Leuchtenfunktion über einen sehr großen Winkelbereich erzeugt werden. Die Beleuchtungseinrichtung also bei Kraftfahrzeugleuchten mit einer Pfeilung und/oder Neigung bis zu 90° verwendet werden.Advantageously, with the lighting device according to the invention, a corresponding lighting function can be generated over a very large angular range. The lighting device can therefore be used in motor vehicle lights with a sweep and/or inclination of up to 90°.

Weitere Ausführungsformen betreffen ein Verfahren zum Herstellen von Komponenten der erfindungsgemäßen Beleuchtungseinrichtung. Die Sekundäroptikvorrichtung und die Gittervorrichtung werden in einem Mehrkomponenten, insbesondere Zweikomponenten-Spritzgussverfahren, hergestellt, wobei die Gittervorrichtung auf eine die Lichtaustrittsfläche bildende Fläche der Sekundäroptikvorrichtung aufgebracht wird.Further embodiments relate to a method for producing components of the lighting device according to the invention. The secondary optics device and the grating device are in a multi-component, in particular two-component injection molding process, produced, the grating device being applied to a surface of the secondary optics device forming the light exit surface.

Die Sekundäroptikvorrichtung und die Gittervorrichtung werden gemäß dem Verfahren als ein integrales Bauteil hergestellt. Das integrale Bauteil umfasst dann die insbesondere transparente Sekundäroptikvorrichtung und die insbesondere nicht transparente Gittervorrichtung. Vorteilhafterweise werden die stufenförmigen Lichteintrittsflächen derart ausgebildet, dass alle Stufen dieselbe Entformungsrichtung erfordern.According to the method, the secondary optics device and the grating device are manufactured as an integral component. The integral component then comprises the secondary optics device, which is in particular transparent, and the grating device, which is in particular non-transparent. Advantageously, the stepped light entry surfaces are formed in such a way that all steps require the same demolding direction.

Weitere Vorteile ergeben sich aus der Beschreibung und den beigefügten Zeichnungen. Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt und werden in der nachfolgenden Beschreibung näher erläutert. Dabei bezeichnen gleiche Bezugszeichen in verschiedenen Figuren jeweils gleiche oder zumindest ihrer Funktion nach vergleichbare Elemente. Bei der Beschreibung einzelner Figuren wird gegebenenfalls auch auf Elemente aus anderen Figuren Bezug genommen. Es zeigen jeweils in schematischer Form:

Fig. 1
Elemente einer erfindungsgemäßen Beleuchtungseinrichtung in einer schematischen Ansicht;
Fig. 2
weitere Elemente der erfindungsgemäßen Beleuchtungseinrichtung in einer perspektivischen Ansicht von vorne;
Fig. 3
die Elemente aus Fig. 2 in einer Explosionsdarstellung
Fig. 4
die Elemente aus Fig. 2 und 3 in einer perspektivischen Ansicht von hinten;
Fig. 5
die Elemente aus Fig. 4 in einer Explosionsdarstellung, und
Fig. 6
die Elemente aus Fig. 2 bis 5 in Ansicht von oben.
Further advantages result from the description and the accompanying drawings. Embodiments of the invention are shown in the drawings and are explained in more detail in the following description. The same reference symbols in different figures denote the same elements or elements that are at least comparable in terms of their function. In the description of individual figures, reference is also made to elements from other figures where appropriate. They each show in schematic form:
1
Elements of a lighting device according to the invention in a schematic view;
2
further elements of the lighting device according to the invention in a perspective view from the front;
3
the elements off 2 in an exploded view
4
the elements off 2 and 3 in a perspective view from behind;
figure 5
the elements off 4 in an exploded view, and
6
the elements off Figures 2 to 5 in top view.

Fig. 1 zeigt eine Trägervorrichtung 10 für eine erfindungsgemäße Beleuchtungseinrichtung. Die Trägervorrichtung 10 ist insbesondere eine Platine. Die Trägervorrichtung 10 umfasst insbesondere ein starres oder flexibles Material. 1 shows a carrier device 10 for a lighting device according to the invention. The carrier device 10 is in particular a circuit board. The carrier device 10 comprises in particular a rigid or flexible material.

Auf der Trägervorrichtung 10 ist eine Mehrzahl an Lichtquellen 12 angeordnet. Bei den Lichtquellen 12 handelt es sich beispielsweise um Leuchtdioden, LEDs. Die Lichtquellen 12 sind vorzugsweise einzeln aktivierbar, also insbesondere einschaltbar, ausschaltbar und/oder dimmbar. Alternativ oder ergänzend kann auch vorgesehen sein, dass eine oder mehrere Lichtquellengruppen, umfassend eine Teilmenge der Lichtquellen 12, jeweils einzeln aktivierbar sind.A plurality of light sources 12 are arranged on the carrier device 10 . The light sources 12 are, for example, light-emitting diodes, LEDs. The light sources 12 can preferably be activated individually, ie in particular can be switched on, switched off and/or dimmed. Alternatively or additionally, it can also be provided that one or more light source groups, comprising a subset of the light sources 12, can each be activated individually.

Unter Bezugnahme auf die Figuren 2 bis 6 werden weitere Elemente der erfindungsgemäßen Beleuchtungseinrichtung erläutert.Referring to the Figures 2 to 6 further elements of the lighting device according to the invention are explained.

Die Beleuchtungseinrichtung umfasst weiter eine Mehrzahl an einer jeweiligen Lichtquelle 12 zugeordneten Primäroptiken 14 zum Bündeln des von der jeweiligen Lichtquelle 12 ausgesandten Lichts.The lighting device further includes a plurality of primary optics 14 assigned to a respective light source 12 for bundling the light emitted by the respective light source 12 .

Die Primäroptiken 14 sind beispielsweise als Sammellinsen ausgebildet. Jede Primäroptik 14 bündelt das von einer Lichtquelle 12 ausgesandte Licht, insbesondere in eine Vorzugsrichtung. Die Vorzugsrichtung ist beispielsweise eine Richtung zwischen der Normalen der Ebene, in der die Lichtquelle 12 angeordnet ist, also die Ebene der Trägervorrichtung 10, und eine Richtung in oder entgegen der Fahrtrichtung eines Kraftfahrzeugs.The primary optics 14 are designed, for example, as converging lenses. Each primary optics 14 bundles the light emitted by a light source 12, in particular in a preferred direction. The preferred direction is, for example, a direction between the normal of the plane in which the light source 12 is arranged, ie the plane of the carrier device 10, and a direction in or against the direction of travel of a motor vehicle.

Gemäß der dargestellten Ausführungsform ist eine jeweilige Primäroptik 14 ein separates Bauteil. Gemäß einer alternativen nicht dargestellten Ausführungsform, können mehrere Primäroptiken 14 ein gemeinsames Bauteil bilden. Beim Positionieren einer jeweiligen Primäroptik 14, insbesondere des Fokuspunkts der Primäroptik 14, zu einer jeweiligen Lichtquelle 12 ist insbesondere eine hohe Genauigkeit erforderlich, wobei Toleranzen insbesondere im Bereich von 0,1 mm bis 0,2 mm liegen. Beim Zusammenfassen von mehreren Primäroptiken zu einem gemeinsamen Bauteil muss daher die erforderliche Positioniergenauigkeit gewährleistet sein.According to the illustrated embodiment, a respective primary optics 14 is a separate component. According to an alternative embodiment that is not shown, several primary optics 14 can form a common component. When positioning a respective primary optics 14, in particular the focal point of the primary optics 14, to a respective light source 12, a high degree of accuracy is required in particular, with tolerances being in the range of 0.1 mm to 0.2 mm in particular. When combining several primary optics into a common component, the required positioning accuracy must therefore be guaranteed.

Gemäß einer nicht dargestellten, vorteilhaften Ausführungsform ist vorgesehen, dass die Primäroptiken 14 auf oder an der Trägervorrichtung 10 angeordnet sind.According to an advantageous embodiment that is not shown, it is provided that the primary optics 14 are arranged on or at the carrier device 10 .

Die Beleuchtungseinrichtung umfasst weiter eine Sekundäroptikvorrichtung 16 zum Abbilden des von den Primaroptiken 14 gebündelten Lichts in eine Beleuchtungsebene. Die Sekundäroptikvorrichtung 16 umfasst mit einer Mehrzahl an einer jeweiligen Lichtquelle 12 zugeordneten Lichteintrittsflächen 18.The lighting device further includes a Secondary optics device 16 for imaging the light bundled by the primary optics 14 in an illumination plane. The secondary optics device 16 comprises a plurality of light entry surfaces 18 assigned to a respective light source 12.

Die Sekundäroptikvorrichtung 16 ist zumindest teilweise transparent, insbesondere aus einem Material umfassend Kunststoff. Die Sekundäroptikvorrichtung 16 bricht die über die Lichteintrittsflächen 18 eintretenden Lichtbündel an einer, insbesondere eben ausgebildeten, Lichtaustrittsfläche 20 in eine gewünschte Richtung. Die gewünschte Richtung umfasst, insbesondere in Abhängigkeit der erzeugbaren Leuchtenfunktion, beispielsweise eine Richtung in oder entgegen der Fahrtrichtung eines Kraftfahrzeugs, oder eine Richtung zu einer Seite des Kraftfahrzeugs.The secondary optics device 16 is at least partially transparent, in particular made of a material comprising plastic. The secondary optics device 16 breaks the light bundles entering via the light entry surfaces 18 in a desired direction on a light exit surface 20 that is in particular flat. The desired direction includes, in particular as a function of the lamp function that can be generated, for example a direction in or against the direction of travel of a motor vehicle, or a direction to one side of the motor vehicle.

Gemäß einer vorteilhaften Ausführungsform ist vorgesehen, dass die Lichteintrittsflächen 18 der Sekundäroptikvorrichtung 16 stufenförmig angeordnet sind. Somit ergibt sich eine Gesamtlichteintrittsfläche 22 mit einer Mehrzahl an Stufen, wobei eine jeweilige Stufe die Lichteintrittsfläche 18 für das Licht einer jeweiligen Lichtquelle bildet. Die stufenförmigen Lichteintrittsflächen 18 lenken das eintretende Licht derart um, dass das eintretende Licht an der Lichtaustrittfläche 20 in die gewünschte Richtung gebrochen werden kann. Vorzugsweise sind die Lichtbündel durch die Primäroptiken 14 bereits so orientiert, dass die Lichteintrittsfläche 18 in etwa senkrecht zu den Strahlen der Lichtbündel stehen kann.According to an advantageous embodiment, it is provided that the light entry surfaces 18 of the secondary optics device 16 are arranged in a stepped manner. This results in an overall light entry surface 22 with a plurality of steps, with each step forming the light entry surface 18 for the light from a respective light source. The stepped light entry surfaces 18 deflect the entering light in such a way that the entering light can be refracted in the desired direction at the light exit surface 20 . Preferably, the light beams are already oriented by the primary optics 14 so that the Light entry surface 18 can be approximately perpendicular to the rays of the light beam.

Gemäß der dargestellten Ausführungsformen ist in Lichtaustrittsrichtung, vgl. Pfeil 24, nach der Lichtaustrittsfläche 20 der Sekundäroptikvorrichtung 16 eine Gittervorrichtung 26 zur Segmentierung des über die Lichtaustrittsfläche 20 austretenden Lichts vorgesehen.According to the illustrated embodiments, a grating device 26 for segmenting the light exiting via the light exit surface 20 is provided in the light exit direction, cf. arrow 24 , after the light exit surface 20 of the secondary optics device 16 .

Die Gittervorrichtung 26 segmentiert das über die Lichtaustrittsfläche der Sekundäroptikvorrichtung austretende Licht. Die Gittervorrichtung 26 umfasst insbesondere eine Mehrzahl ein Gittersegmenten 28, wobei die einzelnen Gittersegmente 28 durch dazwischen angeordnete Stege 30 voneinander getrennt sind. Die Gittervorrichtung 26 erstreckt sich beispielsweise in einer Ebene, wobei durch eine Dicke bzw. Breite der Stege 30 eine Art dreidimensionales Gitter gegeben ist. Alternativ kann die Gittervorrichtung 26 an sich gewölbt oder gebogen ausgeführt sein. Beispielsweise entsteht die Form die Gittervorrichtung 26 durch Projizieren eines zweidimensionalen Gitters auf eine sich im Raum erstreckende Freiformfläche, insbesondere ein Ausschnitt aus einer Kugeloberfläche. Vorzugsweise ist einer jeweiligen Lichtquelle 12 ein jeweiliges Gittersegment 28 zugeordnet.The grating device 26 segments the light exiting via the light exit surface of the secondary optics device. The lattice device 26 comprises, in particular, a plurality of lattice segments 28, the individual lattice segments 28 being separated from one another by webs 30 arranged between them. The lattice device 26 extends, for example, in one plane, with a type of three-dimensional lattice being given by the thickness or width of the webs 30 . Alternatively, the grating device 26 itself can be arched or curved. For example, the shape of the grating device 26 is created by projecting a two-dimensional grating onto a free-form surface extending in space, in particular a section of a spherical surface. A respective grid segment 28 is preferably assigned to a respective light source 12 .

Die Gittervorrichtung 26, also die Stege 30 der Gittervorrichtung 26, sind insbesondere nicht transparent, insbesondere aus einem Material umfassend Kunststoff.The lattice device 26, that is to say the webs 30 of the lattice device 26, are in particular not transparent, in particular made of a material comprising plastic.

Beim Positionieren der Primäroptiken 14 und der Sekundäroptik 16 zueinander liegt die Toleranz zur Positionierung im Bereich der Größenordnung der Breite der Stege 30 der Gittervorrichtung 26.When positioning the primary optics 14 and the secondary optics 16 relative to one another, the tolerance for positioning is in the order of magnitude of the width of the webs 30 of the grating device 26.

Gemäß der dargestellten Ausführungsform sind die Sekundäroptikvorrichtung 16 und die Gittervorrichtung 26 als ein integrales Bauteil 32 ausgebildet. Das integrale Bauteil 32 umfasst dann die insbesondere transparente Sekundäroptikvorrichtung 16 und die insbesondere nicht transparente Gittervorrichtung 26. Beispielsweise wird das Bauteil 32 in einem Mehrkomponenten, insbesondere Zweikomponenten-Spritzgussverfahren, gefertigt. Die Sekundäroptikvorrichtung 26 umfasst insbesondere eine ebene Lichtaustrittsfläche. Die ebene Lichtaustrittsfläche 26 begünstigt, das Aufspritzen der Gittervorrichtung 26 daran. Vorteilhafterweise werden die stufenförmigen Lichteintrittsflächen derart ausgebildet, dass alle Stufen dieselbe Entformungsrichtung erfordern.According to the illustrated embodiment, the secondary optics device 16 and the grating device 26 are formed as an integral component 32 . The integral component 32 then includes the in particular transparent secondary optics device 16 and the in particular non-transparent grating device 26. For example, the component 32 is manufactured in a multi-component, in particular two-component injection molding process. The secondary optics device 26 includes, in particular, a flat light exit surface. The flat light exit surface 26 promotes spraying of the grating device 26 thereon. Advantageously, the stepped light entry surfaces are formed in such a way that all steps require the same demolding direction.

Es ist bevorzugt, dass in einer Gesamtanordnung der Beleuchtungseinrichtung, beispielsweise einer Kombination der Figuren 1 und 2 bis 5, die Lichtaustrittsfläche 20 der Sekundäroptikvorrichtung 16 parallel zu einer Ebene der Trägervorrichtung 10 angeordnet ist.It is preferred that in an overall arrangement of the lighting device, for example a combination of figures 1 and 2 to 5 , the light exit surface 20 of the secondary optics device 16 is arranged parallel to a plane of the carrier device 10 .

Weiter ist gemäß den dargestellten Ausführungsformen vorgesehen, dass in Lichtaustrittsrichtung 24 nach der Gittervorrichtung 26 eine, insbesondere transparente, Scheibe 34 angeordnet ist. Die Positionierung der Scheibe 34 zur Gittervorrichtung 26 ist im Verhältnis zur Positionierung der Primäroptiken 14 zu den Lichtquellen 12 und/oder der Sekundäroptikvorrichtung 16 zusammen mit der Gittervorrichtung 26 zu den Primäroptiken 14 relativ unkritisch. Das über die Lichtaustrittsfläche 20 der Sekundäroptikvorrichtung 16 austretende Licht wurde zuvor entsprechend gerichtet. Ein möglichst kleiner und möglichst regelmäßiger Luftspalt 36 in der Größenordnung bis 0,5mm ist jedoch erstrebenswert, um Abbildungsfehler und Überstrahlen zu vermeiden.Furthermore, according to the illustrated embodiments, it is provided that a pane 34 , in particular a transparent pane, is arranged after the grating device 26 in the light exit direction 24 . The positioning of the disc 34 to the grating device 26 is in relation to Positioning of the primary optics 14 to the light sources 12 and/or the secondary optics device 16 together with the grating device 26 to the primary optics 14 is relatively uncritical. The light exiting via the light exit surface 20 of the secondary optics device 16 has previously been directed accordingly. However, an air gap 36 of the order of magnitude of up to 0.5 mm which is as small and as regular as possible is desirable in order to avoid aberrations and blooming.

Gemäß einer vorteilhaften, nicht dargestellten Ausführungsform ist vorgesehen, dass die Scheibe 34, insbesondere auf einer Lichtaustrittsfläche 38, mikrooptische Elemente umfasst. Die mikrooptischen Elemente können beispielsweise erforderlich sein, um eine Lichtverteilung entsprechend gesetzlicher Anforderungen zu erzeugen. Die mikrooptischen Elemente sind beispielsweise Streuoptiken, insbesondere in Form von auf einer Lichtaustrittsfläche 38 der Scheibe 34 ausgebildeten Kissenoptiken.According to an advantageous embodiment that is not shown, it is provided that the pane 34 comprises micro-optical elements, in particular on a light exit surface 38 . The micro-optical elements can be required, for example, in order to generate a light distribution in accordance with legal requirements. The micro-optical elements are, for example, scattering optics, in particular in the form of cushion optics formed on a light exit surface 38 of the pane 34 .

Die Anzahl der dargestellten Lichtquellen 12, und die Anzahl der Primäroptiken 14 und Anzahl der Gittersegmente 28 ist lediglich beispielhaft. Bei der erfindungsgemäßen Beleuchtungseinrichtung ist vorgesehen, dass die Anzahl der Lichtquellen 12 und damit die Anzahl der Primäroptiken 14 und Gittersegmenten 28 insbesondere wenigstens 50, vorzugsweise 100 bis 1000, insbesondere bis 5000, oder mehr beträgt. Die Gittersegmente 28 können in einer beliebigen Anzahl in Reihen und Zeilen angeordnet sein. Bevorzugt ist beispielsweise eine Anzahl von sieben bis sechzehn Zeilen.The number of light sources 12 shown, and the number of primary optics 14 and number of grating segments 28 is only an example. In the lighting device according to the invention, it is provided that the number of light sources 12 and thus the number of primary optics 14 and grating segments 28 is in particular at least 50, preferably 100 to 1000, in particular up to 5000, or more. The grating segments 28 can be arranged in rows and rows in any number. is preferred for example, a number of seven to sixteen lines.

Claims (12)

Beleuchtungseinrichtung, insbesondere für ein Kraftfahrzeug, umfassend eine Mehrzahl von Lichtquellen (12), wobei die Lichtquellen (12) jeweils einzeln oder zumindest eine oder mehrere Lichtquellengruppen, umfassend eine Teilmenge der Lichtquellen (12), jeweils einzeln aktivierbar sind, mit einer Mehrzahl an einer jeweiligen Lichtquelle (12) zugeordneten Primäroptiken (14) zum Bündeln des von der jeweiligen Lichtquelle (12) ausgesandten Lichts, und
eine Sekundäroptikvorrichtung (16) zum Abbilden des gebündelten Lichts in eine Beleuchtungsebene mit einer Mehrzahl an einer jeweiligen Lichtquelle (12) zugeordneten Lichteintrittsflächen (18) und einer Lichtaustrittsfläche (20), dadurch gekennzeichnet, dass in Lichtaustrittsrichtung (24) nach der Lichtaustrittsfläche (20) der Sekundäroptikvorrichtung (16) eine Gittervorrichtung (26) zur Segmentierung des über die Lichtaustrittsfläche (20) austretenden Lichts vorgesehen ist.Lighting device, in particular for a motor vehicle, comprising a plurality of light sources (12), wherein the light sources (12) can each be activated individually or at least one or more light source groups, comprising a subset of the light sources (12), can each be activated individually, with a plurality of one primary optics (14) assigned to the respective light source (12) for bundling the light emitted by the respective light source (12), and
a secondary optics device (16) for imaging the bundled light in an illumination plane with a plurality of light entry surfaces (18) assigned to a respective light source (12) and a light exit surface (20), characterized in that in the light exit direction (24) after the light exit surface (20) the secondary optics device (16) has a grating device (26) for segmenting the is provided via the light exit surface (20) exiting light. Beleuchtungseinrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Lichteintrittsflächen (18) der Sekundäroptikvorrichtung (16) stufenförmig angeordnet sind.Lighting device according to Claim 1, characterized in that the light entry surfaces (18) of the secondary optics device (16) are arranged in steps. Beleuchtungseinrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Sekundäroptikvorrichtung (16) und die Gittervorrichtung (26) als ein integrales Bauteil (32) ausgebildet sind.Lighting device according to one of Claims 1 or 2, characterized in that the secondary optics device (16) and the grating device (26) are designed as an integral component (32). Beleuchtungseinrichtung nach wenigstens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass wenigstens eine Trägervorrichtung (10) vorgesehen ist, wobei die Lichtquellen (12) oder eine Teilmenge der Lichtquellen (12) auf der Trägervorrichtung (10) angeordnet sind.Lighting device according to at least one of the preceding claims, characterized in that at least one carrier device (10) is provided, the light sources (12) or a subset of the light sources (12) being arranged on the carrier device (10). Beleuchtungseinrichtung nach wenigstens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass eine jeweilige Primäroptik (14) ein separates Bauteil ist oder dass mehrere Primäroptiken (14) ein gemeinsames Bauteil bilden.Lighting device according to at least one of the preceding claims, characterized in that a respective primary optics (14) is a separate component or that a plurality of primary optics (14) form a common component. Beleuchtungseinrichtung nach wenigstens einem der Ansprüche 4 oder 5, dadurch gekennzeichnet, dass die Primäroptiken (14) auf oder an der Trägervorrichtung (10) angeordnet sind.Lighting device according to at least one of Claims 4 or 5, characterized in that the primary optics (14) are arranged on or at the carrier device (10). Beleuchtungseinrichtung nach wenigstens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Lichtaustrittsfläche (20) der Sekundäroptikvorrichtung (16) parallel zu einer Ebene der Trägervorrichtung (10) angeordnet ist.Lighting device according to at least one of the preceding claims, characterized in that the light exit surface (20) of the secondary optics device (16) is arranged parallel to a plane of the carrier device (10). Beleuchtungseinrichtung nach wenigstens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass in Lichtaustrittsrichtung (24) nach der Gittervorrichtung (26) eine, insbesondere transparente, Scheibe (34) angeordnet ist.Lighting device according to at least one of the preceding claims, characterized in that a, in particular transparent, pane (34) is arranged in the light exit direction (24) after the grating device (26). Beleuchtungseinrichtung nach Anspruch 8, dadurch gekennzeichnet, dass die Scheibe (34), insbesondere auf einer Lichtaustrittsfläche (38), mikrooptische Elemente umfasst.Lighting device according to Claim 8, characterized in that the pane (34) comprises micro-optical elements, in particular on a light exit surface (38). Beleuchtungseinrichtung nach wenigstens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass Anzahl der Lichtquellen (12), insbesondere wenigstens 50, vorzugsweise 100 bis 1000, insbesondere bis 5000, oder mehr, beträgt.Lighting device according to at least one of the preceding claims, characterized in that the number of light sources (12) is in particular at least 50, preferably 100 to 1000, in particular up to 5000, or more. Beleuchtungseinrichtung nach wenigstens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Beleuchtungseinrichtung zum Erzeugen einer Signallichtfunktion, insbesondere einer Blicklichtfunktion und/oder einer Tagfahrlichtfunktion ausgebildet ist.Lighting device according to at least one of the preceding claims, characterized in that the lighting device is designed to generate a signal light function, in particular a visual light function and/or a daytime running light function. Verfahren zum Herstellen von Komponenten der Beleuchtungseinrichtung nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass Sekundäroptikvorrichtung (16) und die Gittervorrichtung (26) in einem Mehrkomponenten, insbesondere Zweikomponenten-Spritzgussverfahren, hergestellt wird, wobei die Gittervorrichtung (26) auf eine die Lichtaustrittsfläche (20) bildende Fläche der Sekundäroptikvorrichtung (16) aufgebracht wird.Method for producing components of the lighting device according to one of Claims 1 to 11, characterized in that the secondary optics device (16) and the grating device (26) are produced in a multi-component, in particular two-component injection molding process, the grating device (26) being on one of the Light exit surface (20) forming surface of the secondary optics device (16) is applied.
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