EP4013993B1 - Lighting device for a motor vehicle headlight - Google Patents

Lighting device for a motor vehicle headlight Download PDF

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Publication number
EP4013993B1
EP4013993B1 EP20737456.2A EP20737456A EP4013993B1 EP 4013993 B1 EP4013993 B1 EP 4013993B1 EP 20737456 A EP20737456 A EP 20737456A EP 4013993 B1 EP4013993 B1 EP 4013993B1
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EP
European Patent Office
Prior art keywords
light
primary
optical element
illumination device
exit surface
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
EP20737456.2A
Other languages
German (de)
French (fr)
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EP4013993A1 (en
Inventor
Christian Maier
Martin Schragl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZKW Group GmbH
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ZKW Group GmbH
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Publication date
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Publication of EP4013993A1 publication Critical patent/EP4013993A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/24—Light guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/322—Optical layout thereof the reflector using total internal reflection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • F21S41/435—Hoods or cap-shaped
    • 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
    • F21S43/15—Strips of 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
    • F21S43/20—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
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
    • F21S43/31—Optical layout thereof
    • F21S43/315—Optical layout thereof using total internal reflection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • 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
    • F21S43/40—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the combination of reflectors and refractors
    • 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
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region

Definitions

  • the invention also relates to a motor vehicle headlight with a lighting device.
  • a light beam adjustment device for a motor vehicle headlight is known.
  • lighting devices for motor vehicle headlights in which light exits via a light-conducting body, undesired refraction of light often occurs at the boundary surface of the light-conducting body. This is particularly problematic when the light-guiding body has a large spatial extent in the direction of light propagation.
  • the object of the present invention is to alleviate or eliminate the disadvantages of the prior art.
  • the invention therefore aims in particular to create a lighting device in which the light emission is improved.
  • the secondary light entry surface is formed by a multiplicity of optical elements which are arranged areally next to one another and which are set up to break the light beams when they enter the secondary optical element in such a way that the light beams, after their refraction which takes place when exiting the secondary light exit surface, in Are oriented towards the main emission direction.
  • the light beams are thus advantageously oriented in front of and behind the secondary optics element in or parallel to the direction of light propagation. The refraction of the light beams when they enter the secondary optical element via the secondary light entry surface through the optical elements can thus compensate for the refraction at the secondary light exit surface.
  • Each optical element on the secondary light entry surface can be designed as a facet, which are preferably arranged together in a uniform grid on the secondary light entry surface.
  • a facet is to be understood as meaning a geometric arrangement on the secondary light entry surface that is smaller than the secondary light entry surface, such as a surface element that is tilted relative to the secondary light entry surface.
  • the individual facets are preferably of the same type.
  • the refraction of light at a facet is essentially predetermined by the curvature of the secondary light exit surface or the refraction of light caused thereby at the secondary light exit surface, since the refraction of light at the facet compensates the refraction of light at the secondary light exit surface.
  • the facets can each be oriented at an angle ⁇ 0° to the secondary light entry surface.
  • the angle ⁇ is determined by the curvature or the angle of refraction at the secondary light exit surface.
  • the angle ⁇ can also be equal to zero.
  • the distance between the primary optics element and the secondary optics element can be 1 mm, preferably 2 mm. This results in the advantage that the optical elements on the secondary light entry surface cannot be damaged by possible contact with the primary light exit surface.
  • the primary optics element and the secondary optics element can be formed in one piece or in one piece.
  • the primary light exit surface can have light-scattering means in order to scatter the light radiated in by the illuminant around the main emission direction when exiting the primary light exit surface. This results in the advantage that the secondary light exit surface is illuminated with an essentially constant illuminance per unit area.
  • the secondary optics element is preferably designed as a transparent solid body.
  • the secondary optics element can be made of plastic, for example.
  • the secondary optics element can also be designed as a transparent hollow body.
  • the primary optics element is preferably designed as a transparent solid body.
  • the primary optics element can be made of plastic, for example.
  • the primary optics element can also be designed as a transparent hollow body.
  • the secondary light entry surface and the secondary light exit surface can be curved, there being preferably a substantially constant normal distance between the secondary light entry surface and the secondary light exit surface, starting from the secondary light exit surface.
  • the curvature can come about because the secondary optics element has a sweep, with the curved configuration causing the undesired refraction of light to occur on the secondary light exit surface, which is compensated in particular by the optical elements on the secondary light entry surface.
  • the normal distance between the secondary light entry surface and the secondary light exit surface can also not be constant, with the secondary light entry surface and the secondary light exit surface can have a different curvature.
  • the primary optics element has a single primary light entry surface, with the illuminant comprising a light source carrier, preferably a printed circuit board, and a number of light sources arranged thereon, in particular individually controllable, with the light source carrier preferably being arranged on the primary light entry surface in such a way that the light of the light sources is introduced into the primary optical element exclusively via the one primary light entry surface. This advantageously results in minimal losses when light is radiated into the primary optics element. Due to the individually controllable light sources, specific light patterns can be generated on the secondary light exit surface.
  • the light sources are arranged on the light source carrier along an essentially ring-shaped light source path, the light source path being composed of a sequence of the shortest distances between two adjacent light sources, the light sources being distributed in particular at uniform intervals over the entire light source path.
  • the secondary optics element has a recess which is such that the secondary light exit surface has the shape of a closed trajectory.
  • the light source path depicts the geometric shape of the closed trajectory.
  • the individually controllable light sources which are arranged along the light source path, can create luminous images or lighting functions, which can be imaged via the closed trajectory of the secondary light exit surface corresponding to the light source path.
  • the light source is arranged to the primary light entry surface such that the light from the light source in the primary optics element in one of the Main emission direction deviating direction, preferably orthogonal to the main emission direction, is irradiated, according to the invention within the primary optics element deflection means are arranged and set up to direct the light after entering the primary optics element within the primary optics element through the Deflect deflection means in the direction of the main emission direction.
  • the size, in particular the longitudinal extent, of the lighting device can be reduced, which in turn reduces the required installation space, for example in a motor vehicle headlight.
  • a diaphragm can be arranged between the primary optics element and the secondary optics element. This results in the advantage that scattered light, which can be emitted laterally from the secondary light entry surface, is blocked. As a result, the homogeneity of the light intensity emitted via the secondary light exit surface can be improved.
  • a motor vehicle headlight can be provided with a lighting device according to the invention.
  • top In the context of this description, the terms “top”, “bottom”, “horizontal”, “vertical” are to be understood as indications of the orientation when the lighting device is arranged in the normal use position after it has been installed, for example, in a motor vehicle headlight.
  • the lighting device 1 shows a lighting device 1 for a motor vehicle headlight.
  • the lighting device 1 has an illuminant 2 which is set up to generate and emit light.
  • a primary optics element 3 has a primary light entry surface 3a for receiving light emitted by the illuminant 2, the primary optics element 3 being set up to guide the light to a primary light exit surface 3b of the primary optics element 3 and through the primary light exit surface 3b in radiate a main emission direction 4 .
  • the lighting device 1 also has a secondary optics element 5 which is arranged after the primary optics element 3 in the direction of light propagation and is spaced apart from the primary optics element 3 .
  • the distance between the primary optics element 3 and the secondary optics element 5 is 1 mm, preferably 2 mm.
  • the secondary optical element 5 has a secondary light entry surface 5a, with the secondary light entry surface 5a and the primary light exit surface 3b being arranged relative to one another in such a way that the light from the illuminant 2 is radiated from the primary light exit surface 3b via the secondary light entry surface 5a into the secondary optical element 5 becomes.
  • the light is then guided within the secondary optics element 5 to a secondary light exit surface 5b of the secondary optics element 5 .
  • the secondary light entry surface 5a and/or the secondary light exit surface 5b are uneven, in particular curved.
  • the secondary optical element 5 has a spatial extension of at least 2 mm, preferably more than 15 mm, in the light propagation direction. This is particularly in the 6 apparent.
  • the primary optics element 3 and the secondary optics element 5 are designed as a transparent solid body.
  • the primary optical element 3 has a single primary light entry surface 3a.
  • the illuminant 2 comprises a light source carrier 8, preferably a printed circuit board, and a number of light sources 9 arranged thereon, in particular individually controllable Via which a primary light entry surface 3a is introduced into the primary optics element 3 .
  • the light sources 9 are arranged on the light source carrier 8 along an essentially ring-shaped light source path, the light source path being composed of a series of the shortest distances between two adjacent light sources 9, the light sources 9 being in particular at uniform distances over the entire light source path are distributed.
  • the secondary light entry surface 5a is formed by a multiplicity of optical elements 6 arranged areally next to one another, which are set up to break the light beams when entering the secondary optical element 5 in such a way that the light beams, after which when exiting the secondary Light exit surface 5b occurring refraction, are oriented in the direction of the main emission direction 4 (s. 6 ).
  • Each optical element 6 on the secondary light entry surface 5a is designed as a facet which is arranged together in a preferably uniform grid on the secondary light entry surface 5a.
  • the facets are each oriented at an angle ⁇ 0° to the secondary light entry surface 5a.
  • the secondary optics element 5 has a recess 11 which is such that the secondary light exit surface 5b has the shape of a closed trajectory 12 .
  • the light source path maps the geometric shape of the closed trajectory 12 .
  • a diaphragm 13 is arranged between the primary optics element 3 and the secondary optics element 5 .
  • the secondary light entry surface 5a and the secondary light exit surface 5b are curved, with a substantially constant normal distance between the secondary light entry surface 5a and the secondary light exit surface 5b, starting from the secondary light exit surface 5b.
  • the light source 2 is arranged relative to the primary light entry surface 3a in such a way that the light from the light source 2 is radiated into the primary optics element 3 in a direction that deviates from the main emission direction 4, in this case orthogonally to the main emission direction 4.
  • Deflection means 3c are arranged and set up within the primary optics element 3 in such a way that To deflect light after entering the primary optics element 3 within the primary optics element 3 by the deflection means 3c in the direction of the main emission direction 4 (see Fig. 2 ).
  • the primary optics element 3 and the secondary optics element 5 can be designed in one piece.

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

Description

Die Erfindung betrifft eine Beleuchtungsvorrichtung für einen Kraftfahrzeugscheinwerfer, umfassend:

  • ein Leuchtmittel, welches dazu eingerichtet ist, Licht zu erzeugen und abzustrahlen;
  • ein Primäroptikelement, welches dem Leuchtmittel zugeordnet ist, wobei das Primäroptikelement eine Primär-Lichteintrittsfläche zur Aufnahme von durch das Leuchtmittel abgestrahlte Licht aufweist, wobei das Primäroptikelement dazu eingerichtet ist, das Licht an eine Primär-Lichtaustrittsfläche des Primäroptikelements zu leiten, und durch die Primär-Lichtaustrittsfläche in einer Hauptabstrahlrichtung abzustrahlen;
  • ein Sekundäroptikelement, welches in Lichtausbreitungsrichtung nach dem Primäroptikelement angeordnet und von dem Primäroptikelement beabstandet ist, wobei das Sekundäroptikelement eine Sekundär-Lichteintrittsfläche aufweist, wobei die Sekundär-Lichteintrittsfläche und die Primär-Lichtaustrittsfläche derart zueinander angeordnet sind, dass das Licht des Leuchtmittels von der Primär-Lichtaustrittsfläche über die Sekundär-Lichteintrittsfläche in das Sekundäroptikelement eingestrahlt wird, wobei das Licht innerhalb des Sekundäroptikelements an eine Sekundär-Lichtaustrittsfläche des Sekundäroptikelements geleitet wird, wobei zumindest die Sekundär-Lichteintrittsfläche und/oder die Sekundär-Lichtaustrittsfläche uneben, insbesondere gekrümmt, ist, wobei zwischen der Sekundär-Lichteintrittsfläche und der Sekundär-Lichtaustrittsfläche das Sekundäroptikelement eine in Lichtausbreitungsrichtung räumliche Ausdehnung von zumindest 2 mm, vorzugsweise mehr als 15 mm, aufweist.
The invention relates to a lighting device for a motor vehicle headlight, comprising:
  • an illuminant that is set up to generate and emit light;
  • a primary optics element, which is assigned to the illuminant, wherein the primary optics element has a primary light entry surface for receiving light emitted by the illuminant, wherein the primary optics element is set up to direct the light to a primary light exit surface of the primary optics element, and through the primary Emit light exit surface in a main emission direction;
  • a secondary optics element which is arranged after the primary optics element in the direction of light propagation and is spaced apart from the primary optics element, the secondary optics element having a secondary light entry surface, the secondary light entry surface and the primary light exit surface being arranged in relation to one another in such a way that the light of the illuminant from the primary light exit surface is radiated into the secondary optics element via the secondary light entry surface, with the light being guided within the secondary optics element to a secondary light exit surface of the secondary optics element, with at least the secondary light entry surface and/or the secondary light exit surface being uneven, in particular curved, with between the secondary light entry surface and the secondary light exit surface, the secondary optics element has a spatial extent of at least 2 mm, preferably more than 15 mm, in the light propagation direction.

Die Erfindung betrifft ferner einen Kraftfahrzeugscheinwerfer mit einer Beleuchtungsvorrichtung.The invention also relates to a motor vehicle headlight with a lighting device.

Aus der EP 3 396 238 A1 ist eine Lichtstrahlen-Anpassungsvorrichtung für einen KFZ-Scheinwerfer bekannt. Bei Beleuchtungsvorrichtungen für Kraftfahrzeugscheinwerfer, bei welchen Licht über eine lichtleitenden Körper austritt, kommt es, an der Grenzfläche des lichtleitenden Körpers häufig zu einer unerwünschten Lichtbrechung. Dies ist besonders problematisch, wenn der lichtleitende Körper eine in Lichtausbreitungsrichtung große räumliche Ausdehnung aufweist.From the EP 3 396 238 A1 a light beam adjustment device for a motor vehicle headlight is known. In the case of lighting devices for motor vehicle headlights, in which light exits via a light-conducting body, undesired refraction of light often occurs at the boundary surface of the light-conducting body. This is particularly problematic when the light-guiding body has a large spatial extent in the direction of light propagation.

Die Aufgabe der vorliegenden Erfindung besteht darin, die Nachteile des Standes der Technik zu lindern bzw. zu beseitigen. Die Erfindung setzt sich daher insbesondere zum Ziel, eine Beleuchtungsvorrichtung zu schaffen, bei welcher die Lichtabstrahlung verbessert wird.The object of the present invention is to alleviate or eliminate the disadvantages of the prior art. The invention therefore aims in particular to create a lighting device in which the light emission is improved.

Diese Aufgabe wird durch eine Beleuchtungsvorrichtung mit den Merkmalen von Anspruch 1 gelöst. Bevorzugte Ausführungen sind in den abhängigen Ansprüchen angegeben.This object is achieved by a lighting device having the features of claim 1. Preferred embodiments are given in the dependent claims.

Erfindungsgemäß ist die Sekundär-Lichteintrittsfläche durch eine Vielzahl von flächig nebeneinander angeordneten optischen Elementen ausgebildet, welche dazu eingerichtet sind, die Lichtstrahlen beim Eintritt in das Sekundäroptikelement dergestalt zu brechen, dass die Lichtstrahlen, nach deren beim Austritt aus der Sekundär-Lichtaustrittsfläche erfolgenden Brechung, in Richtung der Hauptabstrahlrichtung orientiert sind. Vorteilhafterweise sind die Lichtstrahlen somit vor und nach dem Sekundäroptikelement in oder parallel zur Lichtausbreitungsrichtung orientiert. Die Brechung der Lichtstrahlen beim Eintritt in das Sekundäroptikelement über die Sekundär-Lichteintrittsfläche durch die optischen Elemente kann somit die Brechung an der Sekundär-Lichtaustrittsfläche kompensieren.According to the invention, the secondary light entry surface is formed by a multiplicity of optical elements which are arranged areally next to one another and which are set up to break the light beams when they enter the secondary optical element in such a way that the light beams, after their refraction which takes place when exiting the secondary light exit surface, in Are oriented towards the main emission direction. The light beams are thus advantageously oriented in front of and behind the secondary optics element in or parallel to the direction of light propagation. The refraction of the light beams when they enter the secondary optical element via the secondary light entry surface through the optical elements can thus compensate for the refraction at the secondary light exit surface.

Jedes optische Element auf der Sekundär-Lichteintrittsfläche kann als Facette ausgebildet sein, die gemeinsam vorzugsweise in einem gleichmäßigen Raster auf der Sekundär-Lichteintrittsfläche angeordnet sind. Als Facette ist in diesem Zusammenhang eine im Vergleich zu der Sekundär-Lichteintrittsfläche kleinere geometrische Anordnung an der Sekundär-Lichteintrittsfläche zu verstehen, wie beispielsweise ein relativ zu der Sekundär-Lichteintrittsfläche verkipptes Flächenelement. Die einzelnen Facetten sind bevorzugt gleichartig. Die Lichtbrechung an einer Facette wird im Wesentlichen durch die Krümmung der Sekundär-Lichtaustrittsfläche bzw. die dadurch hervorgerufene Lichtbrechung an der Sekundär-Lichtaustrittsfläche vorgegeben, da die Lichtbrechung an der Facette die Lichtbrechung an der Sekundär-Lichtaustrittsfläche kompensiert.Each optical element on the secondary light entry surface can be designed as a facet, which are preferably arranged together in a uniform grid on the secondary light entry surface. In this context, a facet is to be understood as meaning a geometric arrangement on the secondary light entry surface that is smaller than the secondary light entry surface, such as a surface element that is tilted relative to the secondary light entry surface. The individual facets are preferably of the same type. The refraction of light at a facet is essentially predetermined by the curvature of the secondary light exit surface or the refraction of light caused thereby at the secondary light exit surface, since the refraction of light at the facet compensates the refraction of light at the secondary light exit surface.

Die Facetten können jeweils unter einem Winkel γ ≠ 0° zu der Sekundär-Lichteintrittsfläche orientiert sein. Der Winkel γ wird durch die Krümmung bzw. den Brechungswinkel an der Sekundär-Lichtaustrittsfläche bestimmt. Der Winkel γ kann auch gleich null sein.The facets can each be oriented at an angle γ≠0° to the secondary light entry surface. The angle γ is determined by the curvature or the angle of refraction at the secondary light exit surface. The angle γ can also be equal to zero.

Der Abstand zwischen dem Primäroptikelement und dem Sekundäroptikelement kann 1 mm, vorzugsweise 2 mm, betragen. Dadurch ergibt sich der Vorteil, dass die optischen Elemente auf der Sekundär-Lichteintrittsfläche durch einen möglichen Kontakt mit der Primär-Lichtaustrittsfläche nicht beschädigt werden können. In einer alternativen Ausführungsform können das Primäroptikelement und das Sekundäroptikelement einstückig bzw. einteilig ausgebildet sein.The distance between the primary optics element and the secondary optics element can be 1 mm, preferably 2 mm. This results in the advantage that the optical elements on the secondary light entry surface cannot be damaged by possible contact with the primary light exit surface. In an alternative embodiment, the primary optics element and the secondary optics element can be formed in one piece or in one piece.

Die Primär-Lichtaustrittsfläche kann lichtstreuende Mittel aufweisen, um das durch das Leuchtmittel eingestrahlte Licht beim Austritt aus der Primär-Lichtaustrittsfläche um die Hauptabstrahlrichtung aufzustreuen. Dadurch ergibt sich der Vorteil, dass die Sekundär-Lichtaustrittsfläche mit einer pro Flächeneinheit im Wesentlichen konstanten Beleuchtungsstärke beleuchtet wird.The primary light exit surface can have light-scattering means in order to scatter the light radiated in by the illuminant around the main emission direction when exiting the primary light exit surface. This results in the advantage that the secondary light exit surface is illuminated with an essentially constant illuminance per unit area.

Vorzugsweise ist das Sekundäroptikelement als transparenter Vollkörper ausgestaltet. Das Sekundäroptikelement kann beispielsweise aus Kunststoff hergestellt sein. Das Sekundäroptikelement kann auch als transparenter Hohlkörper ausgebildet sein.The secondary optics element is preferably designed as a transparent solid body. The secondary optics element can be made of plastic, for example. The secondary optics element can also be designed as a transparent hollow body.

Vorzugsweise ist das Primäroptikelement als transparenter Vollkörper ausgestaltet. Das Primäroptikelement kann beispielsweise aus Kunststoff hergestellt sein. Das Primäroptikelement kann auch als transparenter Hohlkörper ausgebildet sein.The primary optics element is preferably designed as a transparent solid body. The primary optics element can be made of plastic, for example. The primary optics element can also be designed as a transparent hollow body.

Die Sekundär-Lichteintrittsfläche und die Sekundär-Lichtaustrittsfläche können gekrümmt sein, wobei vorzugsweise zwischen der Sekundär-Lichteintrittsfläche und der Sekundär-Lichtaustrittsfläche ein, ausgehend von der Sekundär-Lichtaustrittsfläche, im Wesentlichen konstanter Normalabstand ist. Die Krümmung kann daher zustande kommen, dass das Sekundäroptikelement eine Pfeilung aufweist, wobei durch die gekrümmte Ausgestaltung die unerwünschte Lichtbrechung an der Sekundär-Lichtaustrittsfläche auftreten kann, welche insbesondere durch die optischen Elemente an der Sekundär-Lichteintrittsfläche kompensiert wird. Der Normalabstand zwischen der Sekundär-Lichteintrittsfläche und der Sekundär-Lichtaustrittsfläche kann auch nicht konstant sein, wobei die Sekundär-Lichteintrittsfläche und die Sekundär-Lichtaustrittsfläche eine unterschiedliche Krümmung aufweisen können.The secondary light entry surface and the secondary light exit surface can be curved, there being preferably a substantially constant normal distance between the secondary light entry surface and the secondary light exit surface, starting from the secondary light exit surface. The curvature can come about because the secondary optics element has a sweep, with the curved configuration causing the undesired refraction of light to occur on the secondary light exit surface, which is compensated in particular by the optical elements on the secondary light entry surface. The normal distance between the secondary light entry surface and the secondary light exit surface can also not be constant, with the secondary light entry surface and the secondary light exit surface can have a different curvature.

Das Primäroptikelement weist eine einzige Primär-Lichteintrittsfläche auf, wobei das Leuchtmittel einen Lichtquellenträger, vorzugsweise eine Leiterplatte, und eine Anzahl an darauf angeordneten, insbesondere einzeln ansteuerbare, Lichtquellen umfasst, wobei der Lichtquellenträger vorzugsweise an der Primär-Lichteintrittsfläche dergestalt angeordnet ist, dass das Licht der Lichtquellen ausschließlich über die eine Primär-Lichteintrittsfläche in das Primäroptikelement eingebracht wird. Vorteilhafterweise kommt es dadurch zu minimalen Verlusten beim Einstrahlen von Licht in das Primäroptikelement. Durch die einzeln ansteuerbaren Lichtquellen können bestimmte Leuchtmuster an der Sekundär-Lichtaustrittsfläche erzeugt werden.The primary optics element has a single primary light entry surface, with the illuminant comprising a light source carrier, preferably a printed circuit board, and a number of light sources arranged thereon, in particular individually controllable, with the light source carrier preferably being arranged on the primary light entry surface in such a way that the light of the light sources is introduced into the primary optical element exclusively via the one primary light entry surface. This advantageously results in minimal losses when light is radiated into the primary optics element. Due to the individually controllable light sources, specific light patterns can be generated on the secondary light exit surface.

Die Lichtquellen werden auf dem Lichtquellenträger entlang eines im Wesentlichen ringförmigen Lichtquellen-Pfads angeordnet, wobei sich der Lichtquellen-Pfad aus einer Aneinanderreihung der kürzesten Abstände zwischen zwei benachbarten Lichtquellen zusammensetzt, wobei die Lichtquellen insbesondere in gleichmäßigen Abständen über den gesamten Lichtquellen-Pfad verteilt sind.The light sources are arranged on the light source carrier along an essentially ring-shaped light source path, the light source path being composed of a sequence of the shortest distances between two adjacent light sources, the light sources being distributed in particular at uniform intervals over the entire light source path.

Das Sekundäroptikelement weist eine Aussparung auf, welche dergestalt ist, dass die Sekundär-Lichtaustrittsfläche die Form einer geschlossenen Bahnkurve aufweist.The secondary optics element has a recess which is such that the secondary light exit surface has the shape of a closed trajectory.

Der Lichtquellen-Pfad bildet geometrische Form der geschlossenen Bahnkurve ab.The light source path depicts the geometric shape of the closed trajectory.

Dadurch ergibt sich der Vorteil, dass die einzeln ansteuerbaren Lichtquellen, welche entlang des Lichtquellen-Pfads angeordnet sind, Leuchtbilder bzw. Beleuchtungsfunktionen erstellen können, welche über die mit dem Lichtquellen-Pfad korrespondierende geschlossene Bahnkurve der Sekundär-Lichtaustrittsfläche abgebildet werden können.This results in the advantage that the individually controllable light sources, which are arranged along the light source path, can create luminous images or lighting functions, which can be imaged via the closed trajectory of the secondary light exit surface corresponding to the light source path.

Das Leuchtmittel wird zu der Primär-Lichteintrittsfläche derart angeordnet, dass das Licht von dem Leuchtmittel in das Primäroptikelement in eine von der Hauptabstrahlrichtung abweichenden Richtung, vorzugsweise orthogonal zur Hauptabstrahlrichtung, eingestrahlt wird, wobei erfindungsgemäß innerhalb des Primäroptikelements Umlenkmittel derart angeordnet und dazu eingerichtet sind, das Licht nach dem Eintritt in das Primäroptikelement innerhalb des Primäroptikelements durch die Umlenkmittel in Richtung der Hauptabstrahlrichtung umzulenken. Dadurch kann die Größe, insbesondere die Längsausdehnung, der Beleuchtungsvorrichtung reduziert werden, was wiederum den benötigten Einbauraum, beispielsweise in einem Kraftfahrzeugscheinwerfer, reduziert.The light source is arranged to the primary light entry surface such that the light from the light source in the primary optics element in one of the Main emission direction deviating direction, preferably orthogonal to the main emission direction, is irradiated, according to the invention within the primary optics element deflection means are arranged and set up to direct the light after entering the primary optics element within the primary optics element through the Deflect deflection means in the direction of the main emission direction. As a result, the size, in particular the longitudinal extent, of the lighting device can be reduced, which in turn reduces the required installation space, for example in a motor vehicle headlight.

Zwischen dem Primäroptikelement und dem Sekundäroptikelement kann eine Blende angeordnet sein. Dadurch ergibt sich der Vorteil, dass Streulicht, welches seitlich der Sekundär-Lichteintrittsfläche abgestrahlt werden kann, blockiert wird. Dadurch kann die Homogenität der über die Sekundär-Lichtaustrittsfläche abgestrahlten Lichtintensität verbessert werden.A diaphragm can be arranged between the primary optics element and the secondary optics element. This results in the advantage that scattered light, which can be emitted laterally from the secondary light entry surface, is blocked. As a result, the homogeneity of the light intensity emitted via the secondary light exit surface can be improved.

Es kann ein Kraftfahrzeugscheinwerfer mit einer erfindungsgemäßen Beleuchtungsvorrichtung vorgesehen sein.A motor vehicle headlight can be provided with a lighting device according to the invention.

Im Rahmen dieser Beschreibung sind die Begriffe "oben", "unten", "horizontal", "vertikal" als Angaben der Ausrichtung zu verstehen, wenn die Beleuchtungsvorrichtung in normaler Benutzungsstellung angeordnet ist, nachdem sie beispielsweise in einem Kraftfahrzeugscheinwerfer eingebaut wurde.In the context of this description, the terms "top", "bottom", "horizontal", "vertical" are to be understood as indications of the orientation when the lighting device is arranged in the normal use position after it has been installed, for example, in a motor vehicle headlight.

Die Erfindung wird nachstehend anhand eines bevorzugten Ausführungsbeispiels, auf das sie jedoch nicht beschränkt sein soll, noch weiter erläutert. In den Zeichnungen zeigt:

  • Fig. 1 eine Seitenansicht einer erfindungsgemäßen Beleuchtungsvorrichtung;
  • Fig. 2 eine perspektivische Ansicht eines Primäroptikelements;
  • Fig. 3 eine Rückansicht des Sekundäroptikelements;
  • Fig. 4 eine weitere Ansicht des Primäroptikelements;
  • Fig. 5 eine weitere Ansicht der Beleuchtungsvorrichtung; und
  • Fig. 6 bis 8 verschiedene Ansichten eines Sekundäroptikelements.
The invention is explained in more detail below using a preferred exemplary embodiment, to which, however, it should not be restricted. In the drawings shows:
  • 1 a side view of a lighting device according to the invention;
  • 2 a perspective view of a primary optics element;
  • 3 a rear view of the secondary optical element;
  • 4 another view of the primary optics element;
  • figure 5 another view of the lighting device; and
  • Figures 6 to 8 different views of a secondary optical element.

Fig. 1 zeigt eine Beleuchtungsvorrichtung 1 für einen Kraftfahrzeugscheinwerfer. Die Beleuchtungsvorrichtung 1 weist ein Leuchtmittel 2 auf, welches dazu eingerichtet ist, Licht zu erzeugen und abzustrahlen. Ein Primäroptikelement 3 weist eine Primär-Lichteintrittsfläche 3a zur Aufnahme von durch das Leuchtmittel 2 abgestrahlte Licht auf, wobei das Primäroptikelement 3 dazu eingerichtet ist, das Licht an eine Primär-Lichtaustrittsfläche 3b des Primäroptikelements 3 zu leiten, und durch die Primär-Lichtaustrittsfläche 3b in einer Hauptabstrahlrichtung 4 abzustrahlen. 1 shows a lighting device 1 for a motor vehicle headlight. The lighting device 1 has an illuminant 2 which is set up to generate and emit light. A primary optics element 3 has a primary light entry surface 3a for receiving light emitted by the illuminant 2, the primary optics element 3 being set up to guide the light to a primary light exit surface 3b of the primary optics element 3 and through the primary light exit surface 3b in radiate a main emission direction 4 .

Die Beleuchtungsvorrichtung 1 weist ferner ein Sekundäroptikelement 5 auf, welches in Lichtausbreitungsrichtung nach dem Primäroptikelement 3 angeordnet und von dem Primäroptikelement 3 beabstandet ist. Der Abstand zwischen dem Primäroptikelement 3 und dem Sekundäroptikelement 5 beträgt 1 mm, vorzugsweise 2 mm.The lighting device 1 also has a secondary optics element 5 which is arranged after the primary optics element 3 in the direction of light propagation and is spaced apart from the primary optics element 3 . The distance between the primary optics element 3 and the secondary optics element 5 is 1 mm, preferably 2 mm.

Das Sekundäroptikelement 5 hat eine Sekundär-Lichteintrittsfläche 5a, wobei die Sekundär-Lichteintrittsfläche 5a und die Primär-Lichtaustrittsfläche 3b derart zueinander angeordnet sind, dass das Licht des Leuchtmittels 2 von der Primär-Lichtaustrittsfläche 3b über die Sekundär-Lichteintrittsfläche 5a in das Sekundäroptikelement 5 eingestrahlt wird. Das Licht wird daraufhin innerhalb des Sekundäroptikelements 5 an eine Sekundär-Lichtaustrittsfläche 5b des Sekundäroptikelements 5 geleitet. Die Sekundär-Lichteintrittsfläche 5a und/oder die Sekundär-Lichtaustrittsfläche 5b sind uneben, insbesondere gekrümmt, ausgebildet. Zwischen der Sekundär-Lichteintrittsfläche 5a und der Sekundär-Lichtaustrittsfläche 5b weist das Sekundäroptikelement 5 eine in Lichtausbreitungsrichtung räumliche Ausdehnung von zumindest 2 mm, vorzugsweise mehr als 15 mm, auf. Dies ist insbesondere in den Fig. 6 ersichtlich. Das Primäroptikelement 3 und das Sekundäroptikelement 5 sind als transparenter Vollkörper ausgestaltet.The secondary optical element 5 has a secondary light entry surface 5a, with the secondary light entry surface 5a and the primary light exit surface 3b being arranged relative to one another in such a way that the light from the illuminant 2 is radiated from the primary light exit surface 3b via the secondary light entry surface 5a into the secondary optical element 5 becomes. The light is then guided within the secondary optics element 5 to a secondary light exit surface 5b of the secondary optics element 5 . The secondary light entry surface 5a and/or the secondary light exit surface 5b are uneven, in particular curved. Between the secondary light entry surface 5a and the secondary light exit surface 5b, the secondary optical element 5 has a spatial extension of at least 2 mm, preferably more than 15 mm, in the light propagation direction. This is particularly in the 6 apparent. The primary optics element 3 and the secondary optics element 5 are designed as a transparent solid body.

Fig. 2 und 4 zeigen das Primäroptikelement 3, insbesondere die Primär-Lichtaustrittsfläche 3b, welche lichtstreuende Mittel 7 aufweist. Durch die lichtstreuenden Mittel 7 wird das von dem Leuchtmittel 2 eingestrahlte Licht beim Austritt aus der Primär-Lichtaustrittsfläche 3b um die Hauptabstrahlrichtung 4 aufgestreut. Das Primäroptikelement 3 weist eine einzige Primär-Lichteintrittsfläche 3a auf. Das Leuchtmittel 2 umfasst einen Lichtquellenträger 8, vorzugsweise eine Leiterplatte, und eine Anzahl an darauf angeordneten, insbesondere einzeln ansteuerbare, Lichtquellen 9. Der Lichtquellenträger 8 ist an der Primär-Lichteintrittsfläche 3a dergestalt angeordnet, dass das Licht der Lichtquellen 9 ausschließlich über die eine Primär-Lichteintrittsfläche 3a in das Primäroptikelement 3 eingebracht wird. Die Lichtquellen 9 sind auf dem Lichtquellenträger 8 entlang eines im Wesentlichen ringförmigen Lichtquellen-Pfads angeordnet, wobei sich der Lichtquellen-Pfad aus einer Aneinanderreihung der kürzesten Abstände zwischen zwei benachbarten Lichtquellen 9 zusammensetzt, wobei die Lichtquellen 9 insbesondere in gleichmäßigen Abständen über den gesamten Lichtquellen-Pfad verteilt sind. 2 and 4 show the primary optical element 3, in particular the primary light exit surface 3b, which has light-scattering means 7. The light radiated in by the illuminant 2 is scattered by the light-scattering means 7 around the main emission direction 4 as it emerges from the primary light-emitting surface 3b. The primary optics element 3 has a single primary light entry surface 3a. The illuminant 2 comprises a light source carrier 8, preferably a printed circuit board, and a number of light sources 9 arranged thereon, in particular individually controllable Via which a primary light entry surface 3a is introduced into the primary optics element 3 . The light sources 9 are arranged on the light source carrier 8 along an essentially ring-shaped light source path, the light source path being composed of a series of the shortest distances between two adjacent light sources 9, the light sources 9 being in particular at uniform distances over the entire light source path are distributed.

Wie man in Fig. 3 erkennen kann, ist die Sekundär-Lichteintrittsfläche 5a durch eine Vielzahl von flächig nebeneinander angeordneten optischen Elementen 6 ausgebildet, welche dazu eingerichtet sind, die Lichtstrahlen beim Eintritt in das Sekundäroptikelement 5 dergestalt zu brechen, dass die Lichtstrahlen, nach deren beim Austritt aus der Sekundär-Lichtaustrittsfläche 5b erfolgenden Brechung, in Richtung der Hauptabstrahlrichtung 4 orientiert sind (s. Fig. 6). Jedes optische Element 6 auf der Sekundär-Lichteintrittsfläche 5a ist als Facette ausgebildet, die gemeinsam in einem vorzugsweise gleichmäßigen Raster auf der Sekundär-Lichteintrittsfläche 5a angeordnet sind. Die Facetten sind jeweils unter einem Winkel γ ≠ 0° zu der Sekundär-Lichteintrittsfläche 5a orientiert.how to get in 3 can see, the secondary light entry surface 5a is formed by a multiplicity of optical elements 6 arranged areally next to one another, which are set up to break the light beams when entering the secondary optical element 5 in such a way that the light beams, after which when exiting the secondary Light exit surface 5b occurring refraction, are oriented in the direction of the main emission direction 4 (s. 6 ). Each optical element 6 on the secondary light entry surface 5a is designed as a facet which is arranged together in a preferably uniform grid on the secondary light entry surface 5a. The facets are each oriented at an angle γ≠0° to the secondary light entry surface 5a.

Wie in Fig. 5 ersichtlich, weist das Sekundäroptikelement 5 eine Aussparung 11 auf, welche dergestalt ist, dass die Sekundär-Lichtaustrittsfläche 5b die Form einer geschlossenen Bahnkurve 12 aufweist. Der Lichtquellen-Pfad bildet die geometrische Form der geschlossenen Bahnkurve 12 ab. Zwischen dem Primäroptikelement 3 und dem Sekundäroptikelement 5 ist insbesondere eine Blende 13 angeordnet.As in figure 5 As can be seen, the secondary optics element 5 has a recess 11 which is such that the secondary light exit surface 5b has the shape of a closed trajectory 12 . The light source path maps the geometric shape of the closed trajectory 12 . In particular, a diaphragm 13 is arranged between the primary optics element 3 and the secondary optics element 5 .

Wie aus Fig. 6 ersichtlich, sind die Sekundär-Lichteintrittsfläche 5a und die Sekundär-Lichtaustrittsfläche 5b gekrümmt, wobei zwischen der Sekundär-Lichteintrittsfläche 5a und der Sekundär-Lichtaustrittsfläche 5b ein, ausgehend von der Sekundär-Lichtaustrittsfläche 5b, im Wesentlichen konstanter Normalabstand ist.How out 6 As can be seen, the secondary light entry surface 5a and the secondary light exit surface 5b are curved, with a substantially constant normal distance between the secondary light entry surface 5a and the secondary light exit surface 5b, starting from the secondary light exit surface 5b.

In der Ausführungsform gemäß Fig. 1 ist das Leuchtmittel 2 zu der Primär-Lichteintrittsfläche 3a derart angeordnet ist, dass das Licht von dem Leuchtmittel 2 in das Primäroptikelement 3 in eine von der Hauptabstrahlrichtung 4 abweichenden Richtung, in diesem Fall orthogonal zur Hauptabstrahlrichtung 4, eingestrahlt wird. Innerhalb des Primäroptikelements 3 sind Umlenkmittel 3c derart angeordnet und dazu eingerichtet, das Licht nach dem Eintritt in das Primäroptikelement 3 innerhalb des Primäroptikelements 3 durch die Umlenkmittel 3c in Richtung der Hauptabstrahlrichtung 4 umzulenken (s. Fig. 2).In the embodiment according to 1 the light source 2 is arranged relative to the primary light entry surface 3a in such a way that the light from the light source 2 is radiated into the primary optics element 3 in a direction that deviates from the main emission direction 4, in this case orthogonally to the main emission direction 4. Deflection means 3c are arranged and set up within the primary optics element 3 in such a way that To deflect light after entering the primary optics element 3 within the primary optics element 3 by the deflection means 3c in the direction of the main emission direction 4 (see Fig. 2 ).

In einer weiteren Ausführungsform, können das Primäroptikelement 3 und das Sekundäroptikelement 5 einteilig ausgestaltet sein.In a further embodiment, the primary optics element 3 and the secondary optics element 5 can be designed in one piece.

Claims (12)

  1. Illumination device (1) for a motor vehicle headlamp, comprising:
    - a luminous means (2) adapted to generate and emit light;
    - a primary optical element (3) associated with said illuminating means (2), said primary optical element (3) having a primary light input surface (3a) for receiving light radiated by said illuminating means (2), said primary optical element (3) being adapted to direct said light to a primary light output surface (3b) of said primary optical element (3), and to radiate said light through said primary light output surface (3b) in a main radiating direction (4)
    - a secondary optic element (5) disposed downstream of the primary optic element (3) in the light propagation direction and spaced apart from the primary optic element (3), the secondary optic element (5) having a secondary light input surface (5a), wherein the secondary light input surface (5a) and the primary light output surface (3b) are arranged relative to each other such that the light of the illuminant (2) is irradiated from the primary light output surface (3b) via the secondary light input surface (5a) into the secondary optics element (5), wherein the light is guided within the secondary optical element (5) to a secondary light exit surface (5b) of the secondary optical element (5), wherein at least the secondary light entry surface (5a) and/or the secondary light exit surface (5b) is uneven, in particular curved, wherein between the secondary light entry surface (5a) and the secondary light exit surface (5b) the secondary optical element (5) has a spatial extension in the light propagation direction of at least 2 mm, preferably more than 15 mm,
    wherein the secondary light entry surface (5a) is formed by a plurality of optical elements (6) which are arranged in a planar manner next to one another and which are set up to refract the light rays on entry into the secondary optical element (5) in such a way that the light rays are oriented in the direction of the main radiation direction (4) after being refracted on exit from the secondary light exit surface (5b)
    wherein the light sources (9) are arranged on the light source support (8) along a substantially annular light source path, the light source path being composed of a stringing together of the shortest distances between two adjacent light sources (9),
    wherein the secondary light source element (5) has a recess (11) which is such that the secondary light emitting surface (5b) has the shape of a closed path curve (12),
    wherein the light source path maps the geometric shape of the closed path curve (12),
    characterized in that
    the primary optical element (3) has a single primary light entry surface (3a), the illuminating means (2) comprising a light source carrier (8) and a number of individually controllable light sources (9) arranged thereon, the light source carrier (8) being arranged at the primary light entry surface (3a) in such a way that the light from the light sources (9) is introduced into the primary optical element (3) exclusively via the one primary light entry surface (3a)
    wherein the light source (2) is arranged relative to the primary light entry surface (3a) in such a way that the light from the light source (2) is irradiated into the primary optics element (3) in a direction deviating from the main radiation direction (4), preferably orthogonally to the main radiation direction (4), wherein deflection means (3c) are arranged within the primary optical element (3) in such a way and are set up to deflect the light after entry into the primary optical element (3) within the primary optical element (3) by the deflection means (3c) in the direction of the main radiation direction (4).
  2. Illumination device (1) according to any one of the preceding claims, wherein each optical element (6) on the secondary light input surface (5a) is formed as a facet, which are arranged together preferably in a uniform grid on the secondary light input surface (5a).
  3. Illumination device (1) according to claim 2, wherein the facets are each oriented at an angle γ ≠ 0° to the secondary light-entry surface (5a).
  4. Illumination device (1) according to any one of the preceding claims, wherein the distance between the primary optical element (3) and the secondary optical element (5) is 1 mm, preferably 2 mm.
  5. Illumination device (1) according to one of the preceding claims, wherein the primary light exit surface (3b) comprises light scattering means (7) for scattering the light irradiated by the illuminating means (2) about the main radiation direction (4) when exiting the primary light exit surface (3b).
  6. Illumination device (1) according to one of the preceding claims, wherein the secondary optical element (5) is designed as a transparent solid body.
  7. Illumination device (1) according to one of the preceding claims, wherein the primary optical element (3) is configured as a transparent solid body.
  8. Illumination device (1) according to one of the preceding claims, wherein the secondary light entry surface (5a) and the secondary light exit surface (5b) are curved, wherein preferably between the secondary light entry surface (5a) and the secondary light exit surface (5b) there is a substantially constant normal distance starting from the secondary light exit surface (5b).
  9. Illumination device (1) according to any one of the preceding claims, wherein the light source carrier (8) comprises a printed circuit board.
  10. Illumination device (1) according to any one of the preceding claims, wherein the light sources (9) are distributed at uniform intervals over the entire light source path.
  11. Illumination device (1) according to any one of the preceding claims, wherein a diaphragm (13) is arranged between the primary optical element (3) and the secondary optical element (5).
  12. Motor vehicle headlamp, comprising an illumination device (1) according to any one of claims 1 to 11.
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EP4013993A1 (en) 2022-06-22
EP3779272A1 (en) 2021-02-17
US11906122B2 (en) 2024-02-20
US20220290830A1 (en) 2022-09-15
CN114207350B (en) 2024-03-22
JP2022544381A (en) 2022-10-18
KR20220025896A (en) 2022-03-03
WO2021028124A1 (en) 2021-02-18
JP7349557B2 (en) 2023-09-22
CN114207350A (en) 2022-03-18

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