EP3779272A1 - Lighting device for a motor vehicle headlight - Google Patents
Lighting device for a motor vehicle headlight Download PDFInfo
- Publication number
- EP3779272A1 EP3779272A1 EP19191724.4A EP19191724A EP3779272A1 EP 3779272 A1 EP3779272 A1 EP 3779272A1 EP 19191724 A EP19191724 A EP 19191724A EP 3779272 A1 EP3779272 A1 EP 3779272A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- primary
- optics element
- lighting 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.)
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- 230000003287 optical effect Effects 0.000 claims abstract description 28
- 239000007787 solid Substances 0.000 claims description 5
- 238000000149 argon plasma sintering Methods 0.000 claims description 4
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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.
- the object of the present invention is to alleviate or eliminate the disadvantages of the prior art.
- the invention therefore sets itself the goal in particular of creating a lighting device in which the light emission is improved.
- the secondary light entry surface is formed by a large number of two-dimensionally adjacent optical elements which are designed to refract the light rays as they enter the secondary optics element in such a way that the light rays, after they have been refracted when they exit the secondary light exit surface, into Direction of the main emission are oriented.
- the light beams are thus advantageously oriented upstream and downstream of the secondary optics element in or parallel to the direction of light propagation. The refraction of the light rays when entering the secondary optics element via the secondary light entry surface by 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 together are preferably arranged in a uniform grid on the secondary light entry surface.
- a facet is to be understood as a smaller geometric arrangement on the secondary light entry face than the secondary light entry face, for example a surface element tilted relative to the secondary light entry face.
- the individual facets are preferably of the same type.
- the refraction of light on a facet is essentially predetermined by the curvature of the secondary light exit surface or the light refraction on the secondary light exit surface caused by it, since the light refraction on the facet compensates for the light refraction on 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 zero.
- the distance between the primary optics element and the secondary optics element can be 1 mm, preferably 2 mm. This has 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 it exits 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, with an essentially 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 therefore come about because the secondary optics element has an arrow, whereby the curved design can cause undesired refraction of light 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, the secondary light entry surface and the secondary light exit surface can have a different curvature.
- the primary optics element can have a single primary light entry surface
- the lighting means can comprise a light source carrier, preferably a printed circuit board, and a number of, in particular individually controllable, light sources arranged thereon, wherein the light source carrier is preferably arranged on the primary light entry surface in such a way that the Light from the light sources is only introduced into the primary optics element via a primary light entry surface. This advantageously results in minimal losses when light is irradiated into the primary optics element. Due to the individually controllable light sources, certain light patterns can be generated on the secondary light exit surface.
- the light sources can be arranged on the light source carrier along a substantially ring-shaped light source path, the light source path being composed of a string of the shortest distances between two adjacent light sources, the light sources being distributed in particular at even distances over the entire light source path .
- the secondary optics element can have a recess which is such that the secondary light exit surface has the shape of a closed trajectory.
- the light source path can depict the geometric shape of the closed trajectory. This has the advantage that the individually controllable light sources, which are arranged along the light source path, can create light images or lighting functions that can be mapped via the closed trajectory of the secondary light exit surface that corresponds to the light source path.
- the illuminant can be arranged in relation to the primary light entry surface in such a way that the light is radiated from the illuminant into the primary optics element in a direction deviating from the main emission direction, preferably orthogonal to the main emission direction, deflection means preferably being arranged and set up within the primary optic element in such a way that the light after entering the primary optics element within the primary optics element through the Deflecting 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 installation space required, for example in a motor vehicle headlight.
- a screen can be arranged between the primary optics element and the secondary optics element. This has the advantage that scattered light, which can be emitted to the side of 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 with a lighting device according to the invention can be provided.
- top In the context of this description, the terms “top”, “bottom”, “horizontal”, “vertical” are to be understood as indicating the orientation when the lighting device is arranged in the normal position of use after it has been installed, for example, in a motor vehicle headlight.
- Fig. 1 shows a lighting device 1 for a motor vehicle headlight.
- the lighting device 1 has a light source 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 optic element 3 and through the primary light exit surface 3b in a main emission direction 4 to emit.
- the lighting device 1 furthermore 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 inlet surface 5a, the secondary light inlet surface 5a and the primary light outlet surface 3b being arranged relative to one another in such a way that the light of the illuminant 2 radiates from the primary light outlet surface 3b via the secondary light inlet surface 5a into the secondary optical element 5 becomes.
- the light is then guided within the secondary optical element 5 to a secondary light exit surface 5 b of the secondary optical element 5.
- the secondary light entry surface 5a and / or the secondary light exit surface 5b are uneven, in particular curved.
- the secondary optics element 5 has a spatial extension of at least 2 mm, preferably more than 15 mm, in the direction of light propagation. This is especially true in the Fig. 6 evident.
- the primary optics element 3 and the secondary optics element 5 are designed as a transparent solid body.
- Fig. 2 and 4th show the primary optics element 3, in particular the primary light exit surface 3b, which has light-scattering means 7.
- 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, in particular individually controllable, light sources 9 arranged thereon.
- the light source carrier 8 is arranged on the primary light entry surface 3a in such a way that the light from the light sources 9 is exclusively 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 a substantially ring-shaped light source path, the light source path being composed of a string of the shortest distances between two adjacent light sources 9, the light sources 9 in particular at uniform distances over the entire light source. Path are distributed.
- the secondary light entry surface 5a is formed by a plurality of flat juxtaposed optical elements 6, which are set up to refract the light rays when entering the secondary optical element 5 in such a way that the light rays, after which they exit the secondary Light exit surface 5b occurring refraction, are oriented in the direction of the main emission direction 4 (see Fig. Fig. 6 ).
- Each optical element 6 on the secondary light entry surface 5a is designed as a facet, which are 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 screen 13 is arranged between the primary optics element 3 and the secondary optics element 5.
- the secondary light inlet surface 5a and the secondary light outlet surface 5b are curved, with an essentially constant normal distance between the secondary light inlet surface 5a and the secondary light outlet surface 5b, starting from the secondary light outlet surface 5b.
- the illuminant 2 is arranged in relation to the primary light entry surface 3a in such a way that the light from the illuminant 2 is radiated into the primary optics element 3 in a direction deviating from the main emission direction 4, in this case orthogonal to the main emission direction 4.
- Deflection means 3c are arranged and set up within the primary optical 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. 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)
Abstract
Die Erfindung betrifft eine Beleuchtungsvorrichtung (1) für einen Kraftfahrzeugscheinwerfer, umfassend:- ein Leuchtmittel (2);- ein Primäroptikelement (3), welches eine Primär-Lichteintrittsfläche (3a) zur Aufnahme von durch das Leuchtmittel (2) abgestrahlte Licht aufweist, wobei das Licht an eine Primär-Lichtaustrittsfläche (3b) geleitet und in einer Hauptabstrahlrichtung (4) abgestrahlt wird;- ein Sekundäroptikelement (5), mit einer Sekundär-Lichteintrittsfläche (5a) aufweist, wobei das Licht des Leuchtmittels (2) von der Primär-Lichtaustrittsfläche (3b) über die Sekundär-Lichteintrittsfläche (5a) in das Sekundäroptikelement (5) abgestrahlt und innerhalb des Sekundäroptikelements (5) an eine Sekundär-Lichtaustrittsfläche (5b) geleitet wird, wobei die Sekundär-Lichteintrittsfläche (5a) durch eine Vielzahl von flächig nebeneinander angeordneten optischen Elementen (6) ausgebildet ist, 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.The invention relates to a lighting device (1) for a motor vehicle headlight, comprising: - a lighting means (2); the light is guided to a primary light exit surface (3b) and emitted in a main emission direction (4); The light exit surface (3b) is emitted via the secondary light entry surface (5a) into the secondary optics element (5) and is guided within the secondary optics element (5) to a secondary light exit surface (5b) optical elements (6) arranged next to one another are designed, which are designed to deflect the light rays upon entry into the secondary optical element (5) in this way old to break that the light rays, after their refraction occurring when exiting the secondary light exit surface (5b), are oriented in the direction of the main emission direction (4).
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.
- a lamp which is set up to generate and emit light;
- a primary optics element which is assigned to the illuminant, the primary optics element having a primary light entry surface for receiving light emitted by the illuminant, the primary optics element being set up to guide the light to a primary light exit surface of the primary optic element, and through the primary To 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 at a distance 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 relative to one another in such a way that the light of the illuminant from the primary The light exit surface is radiated into the secondary optical element via the secondary light entrance surface, the light within the secondary optical element being guided to a secondary light exit surface of the secondary optical element, at least the secondary light entrance surface and / or the secondary light exit surface being uneven, in particular curved, with between of the secondary light entry surface and the secondary light exit surface, the secondary optics element has a spatial extension of at least 2 mm, preferably more than 15 mm, in the direction of light propagation.
Die Erfindung betrifft ferner einen Kraftfahrzeugscheinwerfer mit einer Beleuchtungsvorrichtung.The invention also relates to a motor vehicle headlight with a lighting device.
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.In the case of lighting devices for motor vehicle headlights, in which light emerges via a light-conducting body, undesired light refraction often occurs at the interface of the light-conducting body. This is particularly problematic when the light-conducting 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 sets itself the goal in particular of creating 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 with the features of
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 large number of two-dimensionally adjacent optical elements which are designed to refract the light rays as they enter the secondary optics element in such a way that the light rays, after they have been refracted when they exit the secondary light exit surface, into Direction of the main emission are oriented. The light beams are thus advantageously oriented upstream and downstream of the secondary optics element in or parallel to the direction of light propagation. The refraction of the light rays when entering the secondary optics element via the secondary light entry surface by 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 together are preferably arranged in a uniform grid on the secondary light entry surface. In this context, a facet is to be understood as a smaller geometric arrangement on the secondary light entry face than the secondary light entry face, for example a surface element tilted relative to the secondary light entry face. The individual facets are preferably of the same type. The refraction of light on a facet is essentially predetermined by the curvature of the secondary light exit surface or the light refraction on the secondary light exit surface caused by it, since the light refraction on the facet compensates for the light refraction on 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 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 has 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 it exits 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, with an essentially 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 therefore come about because the secondary optics element has an arrow, whereby the curved design can cause undesired refraction of light 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, the secondary light entry surface and the secondary light exit surface can have a different curvature.
Das Primäroptikelement kann eine einzige Primär-Lichteintrittsfläche aufweisen, wobei das Leuchtmittel einen Lichtquellenträger, vorzugsweise eine Leiterplatte, und eine Anzahl an darauf angeordneten, insbesondere einzeln ansteuerbare, Lichtquellen umfassen kann, 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 can have a single primary light entry surface, wherein the lighting means can comprise a light source carrier, preferably a printed circuit board, and a number of, in particular individually controllable, light sources arranged thereon, wherein the light source carrier is preferably arranged on the primary light entry surface in such a way that the Light from the light sources is only introduced into the primary optics element via a primary light entry surface. This advantageously results in minimal losses when light is irradiated into the primary optics element. Due to the individually controllable light sources, certain light patterns can be generated on the secondary light exit surface.
Die Lichtquellen können auf dem Lichtquellenträger entlang eines im Wesentlichen ringförmigen Lichtquellen-Pfads angeordnet sein, 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 can be arranged on the light source carrier along a substantially ring-shaped light source path, the light source path being composed of a string of the shortest distances between two adjacent light sources, the light sources being distributed in particular at even distances over the entire light source path .
Das Sekundäroptikelement kann eine Aussparung aufweisen, welche dergestalt ist, dass die Sekundär-Lichtaustrittsfläche die Form einer geschlossenen Bahnkurve aufweist.The secondary optics element can have a recess which is such that the secondary light exit surface has the shape of a closed trajectory.
Der Lichtquellen-Pfad kann die geometrische Form der geschlossenen Bahnkurve abbilden. 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.The light source path can depict the geometric shape of the closed trajectory. This has the advantage that the individually controllable light sources, which are arranged along the light source path, can create light images or lighting functions that can be mapped via the closed trajectory of the secondary light exit surface that corresponds to the light source path.
Das Leuchtmittel kann zu der Primär-Lichteintrittsfläche derart angeordnet sein, dass das Licht von dem Leuchtmittel in das Primäroptikelement in eine von der Hauptabstrahlrichtung abweichenden Richtung, vorzugsweise orthogonal zur Hauptabstrahlrichtung, eingestrahlt wird, wobei vorzugsweise 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 illuminant can be arranged in relation to the primary light entry surface in such a way that the light is radiated from the illuminant into the primary optics element in a direction deviating from the main emission direction, preferably orthogonal to the main emission direction, deflection means preferably being arranged and set up within the primary optic element in such a way that the light after entering the primary optics element within the primary optics element through the Deflecting 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 installation space required, 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 screen can be arranged between the primary optics element and the secondary optics element. This has the advantage that scattered light, which can be emitted to the side of 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 with a lighting device according to the invention can be provided.
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 indicating the orientation when the lighting device is arranged in the normal position of use 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.
-
Fig. 1 a side view of a lighting device according to the invention; -
Fig. 2 a perspective view of a primary optical element; -
Fig. 3 a rear view of the secondary optics element; -
Fig. 4 another view of the primary optic element; -
Fig. 5 a further view of the lighting device; and -
Figures 6 to 8 different views of a secondary optical element.
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
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
Wie man in
Wie in
Wie aus
In der Ausführungsform gemäß
In einer weiteren Ausführungsform, können das Primäroptikelement 3 und das Sekundäroptikelement 5 einteilig ausgestaltet sein.In a further embodiment, the
Claims (15)
die Sekundär-Lichteintrittsfläche (5a) durch eine Vielzahl von flächig nebeneinander angeordneten optischen Elementen (6) ausgebildet ist, 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.Lighting device (1) for a motor vehicle headlight, comprising:
the secondary light entry surface (5a) is formed by a large number of two-dimensionally adjacent optical elements (6) which are designed to refract the light rays upon entry into the secondary optical element (5) in such a way that the light rays after they exit the secondary light exit surface (5b) occurring refraction, are oriented in the direction of the main emission direction (4).
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19191724.4A EP3779272A1 (en) | 2019-08-14 | 2019-08-14 | Lighting device for a motor vehicle headlight |
JP2022508804A JP7349557B2 (en) | 2019-08-14 | 2020-07-08 | Illumination device for automobile floodlights |
PCT/EP2020/069248 WO2021028124A1 (en) | 2019-08-14 | 2020-07-08 | Illumination device for a motor vehicle headlight |
KR1020227004166A KR20220025896A (en) | 2019-08-14 | 2020-07-08 | Lighting device for automobile headlamps |
CN202080057098.8A CN114207350B (en) | 2019-08-14 | 2020-07-08 | Lighting device for motor vehicle headlight |
US17/632,303 US11906122B2 (en) | 2019-08-14 | 2020-07-08 | Illumination device for a motor vehicle headlight |
EP20737456.2A EP4013993B1 (en) | 2019-08-14 | 2020-07-08 | Lighting device for a motor vehicle headlight |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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EP19191724.4A EP3779272A1 (en) | 2019-08-14 | 2019-08-14 | Lighting device for a motor vehicle headlight |
Publications (1)
Publication Number | Publication Date |
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EP3779272A1 true EP3779272A1 (en) | 2021-02-17 |
Family
ID=67658816
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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EP19191724.4A Withdrawn EP3779272A1 (en) | 2019-08-14 | 2019-08-14 | Lighting device for a motor vehicle headlight |
EP20737456.2A Active EP4013993B1 (en) | 2019-08-14 | 2020-07-08 | Lighting device for a motor vehicle headlight |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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EP20737456.2A Active EP4013993B1 (en) | 2019-08-14 | 2020-07-08 | Lighting device for a motor vehicle headlight |
Country Status (6)
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US (1) | US11906122B2 (en) |
EP (2) | EP3779272A1 (en) |
JP (1) | JP7349557B2 (en) |
KR (1) | KR20220025896A (en) |
CN (1) | CN114207350B (en) |
WO (1) | WO2021028124A1 (en) |
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- 2020-07-08 KR KR1020227004166A patent/KR20220025896A/en not_active Application Discontinuation
- 2020-07-08 WO PCT/EP2020/069248 patent/WO2021028124A1/en unknown
- 2020-07-08 EP EP20737456.2A patent/EP4013993B1/en active Active
- 2020-07-08 CN CN202080057098.8A patent/CN114207350B/en active Active
- 2020-07-08 US US17/632,303 patent/US11906122B2/en active Active
- 2020-07-08 JP JP2022508804A patent/JP7349557B2/en active Active
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Also Published As
Publication number | Publication date |
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JP2022544381A (en) | 2022-10-18 |
CN114207350B (en) | 2024-03-22 |
KR20220025896A (en) | 2022-03-03 |
WO2021028124A1 (en) | 2021-02-18 |
US11906122B2 (en) | 2024-02-20 |
CN114207350A (en) | 2022-03-18 |
JP7349557B2 (en) | 2023-09-22 |
EP4013993A1 (en) | 2022-06-22 |
US20220290830A1 (en) | 2022-09-15 |
EP4013993B1 (en) | 2023-09-06 |
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