EP3350505B1 - Ensemble de sources lumineuses dans un module de lumière de pixel - Google Patents

Ensemble de sources lumineuses dans un module de lumière de pixel Download PDF

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Publication number
EP3350505B1
EP3350505B1 EP16766219.6A EP16766219A EP3350505B1 EP 3350505 B1 EP3350505 B1 EP 3350505B1 EP 16766219 A EP16766219 A EP 16766219A EP 3350505 B1 EP3350505 B1 EP 3350505B1
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EP
European Patent Office
Prior art keywords
light
row
light sources
lighting device
lighting
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EP16766219.6A
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German (de)
English (en)
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EP3350505A1 (fr
Inventor
Josef Plank
Lukas Taudt
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ZKW Group GmbH
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ZKW Group GmbH
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Publication of EP3350505A1 publication Critical patent/EP3350505A1/fr
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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]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • F21S41/153—Light emitting diodes [LED] arranged in one or more lines arranged in a matrix
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/255—Lenses with a front view of circular or truncated circular outline
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
    • F21Y2105/12—Planar light sources comprising a two-dimensional array of point-like light-generating elements characterised by the geometrical disposition of the light-generating elements, e.g. arranging light-generating elements in differing patterns or densities
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the invention relates to a lighting device for a headlamp, in particular a motor vehicle headlamp, comprising a plurality of juxtaposed in rows light sources forming a light field, and a light guide device with a plurality of light guide elements, each light guide element is associated with a light source, each light guide element depending a light input surface for coupling the light emitted by the respective light source and a respective light exit surface, wherein the light guide elements are arranged in at least two superimposed rectilinear rows, and wherein the light guide elements of the bottom row are formed as high-beam light guide elements and form a high beam row.
  • Such lighting units which are also referred to as pixel light modules are common in vehicle construction (see WO 2014/032071 A1 ) and are used, for example, the imaging of glare-free high beam by the light is usually emitted from a plurality of artificial light sources and is bundled by a corresponding plurality of juxtaposed light guides (intent optics / primary optics) in the direction of radiation.
  • the light guides have a relatively small cross-section and therefore emit the light of the individual light sources each associated with very concentrated in the emission direction.
  • Pixel light lamps are very flexible in terms of light distribution, since for each pixel, ie for each light guide, the illuminance can be controlled individually and arbitrary light distributions can be realized.
  • the concentrated radiation of the light guides is desired, for example, to comply with legal requirements regarding the light-dark line of a motor vehicle headlight or implement adaptive flexible Ausblendszenarien, on the other hand, this creates disturbing inhomogeneities in areas of the light image in which a uniform, concentrated and directed illumination desired is.
  • the DE 10 2008 044 968 A1 discloses a lighting device having a plurality of light sources arranged on a luminous area, which form a light-emitting diode array which consists of a plurality of light sources Lines linearly arranged side by side LEDs, wherein a center distance of adjacent light sources in at least one edge region of the luminous area is greater than in a central region of the luminous surface.
  • the DE 10 2008 044 968 A1 The object of the invention is to reduce the total number of light sources required and thus also the production costs.
  • the DE 10 2009 020 619 A1 discloses a lighting device having a plurality of light-emitting diodes, which form a light-emitting diode array, which is formed from at least two rows of linearly arranged side by side light-emitting diodes, wherein a first line has light-emitting LEDs than at least one second row.
  • the DE 10 2012 108 309 A1 describes a headlight for vehicles with multiple groups of LED light sources and with multiple optical units of different imaging characteristics.
  • a two-dimensional row-shaped arrangement of the light sources for example light-emitting diodes (LEDs)
  • LEDs light-emitting diodes
  • the regulation of the illuminance is effected, for example, in the case of LEDs by default by pulse width modulation of the operating current, with which a temporally average different energization of the light source can be achieved.
  • the LEDs are energized more strongly in the central area than at the edge, which is why the maximum of the light distribution is in the middle.
  • the lower current applied to the edge region can lead to inhomogeneities, typically in the form of dark stripes in the edge regions, occurring between the rows of the light distribution.
  • the inhomogeneities between the high beam and the asymmetric series are usually particularly pronounced.
  • the invention which is based on a targeted positioning of the light sources in the edge regions of the luminous field, the described inhomogeneities in the edge regions can be reduced.
  • the invention therefore represents a technically simple and cost-effective measure to locally influence the light distribution in pixel light illumination devices and thus to realize a more homogeneous light distribution in the edge regions of the light field.
  • the light sources of the high beam row which image the outer regions (edge regions) of the light distribution, are displaced slightly in the direction of the row adjacent to the top.
  • the light sources in the center of the light distribution keep a greater distance from each other, as a result, a greater height of the high beam distribution can be achieved.
  • This shift can be designed differently from the central region (no displacement) outwards into the respective edge regions (largest displacement).
  • up and “down” and “above” and “below” as used herein in relation to the arrangement of the rows of light guide elements and light sources refers to the arrangement of the rows in the mounted state of the pixel light module in FIG a headlight.
  • the high beam row is always the lowest row when mounted; in the photo, i. with downstream imaging optics, the high beam row then forms the uppermost light distribution.
  • the distance between the light sources of the high beam row and the overlying row becomes smaller towards the edge area.
  • the vertical distance between the light sources of the high beam row and the light sources of the upwardly adjacent row is smaller only in a lateral edge region of the luminous field than in a central region of the luminous field.
  • the vertical distance between the light sources of the high beam row and the light sources of the upwardly adjacent row in both lateral edge regions of the luminous field is smaller than in the central region of the luminous field.
  • the vertical distance between the light sources of the high beam row and the light sources of the row adjacent to the top gradually decreases from at least one of the edge areas, starting from the central area.
  • the light input surfaces of the light guide elements are generally larger than the areas of the respective light sources (e.g., chip area of the LEDs).
  • the light sources are basically positioned so that they couple the light in the center of the light coupling surface of the respective light guide element.
  • the light sources of the high beam row which are arranged in the central region of the light field, are positioned so that they couple the light in the center of the light coupling surface of the respective light guide element. All the light sources of the remaining rows advantageously couple the light into the center of the light coupling surface of the respective light guide element.
  • the horizontal spacing of adjacent light sources in at least one of the edge regions of the light field increases towards the row edge.
  • the horizontal distance between adjacent light sources in only one edge region increases toward the row edge.
  • the horizontal distance between adjacent light sources in both edge regions increases toward the row edge.
  • the light sources can be arranged either symmetrically or asymmetrically with respect to an optical axis.
  • the construction of a lighting device for pixel light is particularly efficient when the light guide elements are arranged in exactly three rows arranged one above the other, which together form a high beam distribution.
  • the top row may be formed as a front row row, the middle row as an asymmetrical row and the bottom row as a high beam row.
  • the light guide elements of the rows are preferably arranged as close as possible to each other, whereby inhomogeneities in the photograph can be further reduced.
  • the light exit surfaces of the individual light guide elements can therefore be part of a common light exit surface, wherein the individual light exit surfaces adjoin one another.
  • the common light exit surface is typically a curved surface, usually following the Petzval surface of the imaging optics (e.g., an imaging lens).
  • the imaging optics e.g., an imaging lens
  • the light sources are expediently light-emitting diodes (LEDs), which are preferably individually controllable.
  • LEDs are expediently light-emitting diodes (LEDs), which are preferably individually controllable.
  • these are Oslon Compact LEDs with light-emitting areas of 0.5 x 0.5 mm 2 .
  • the light guide elements are designed as light-guiding elements.
  • the basic structure of light-guiding elements and attachment optics for pixel light lighting devices for headlights is known per se.
  • the light-guiding elements are made, for example, of plastic, glass or any other suitable materials for light transmission.
  • the light guide elements are made of a silicone material.
  • the light-guiding elements are typically embodied as a solid body, and preferably consist of a single continuous optical medium, wherein the light conduit takes place within this medium (optimized for the use of total reflection at the light guide surfaces).
  • the light-guiding elements have typically a substantially square or rectangular cross-section and usually widen in a conventional manner in the light emission direction.
  • the light guide elements may be formed as a hollow body with inner boundary surfaces, wherein the boundary surfaces are parallel to the direction of light propagation and reflective or mirrored executed.
  • the lighting device has an imaging optical unit downstream of the light-guiding device in the emission direction (for example a projection lens or a system of several lenses).
  • the imaging optics may comprise one or more optical lenses in a manner known per se.
  • Another object of the invention relates to a headlamp, in particular a motor vehicle headlamp, which comprises a lighting device according to the invention as disclosed herein. Headlights of this type are also referred to as pixel light.
  • Fig. 1a shows an arrangement of light sources 100 (LEDs 100) in a pixel light-emitting device 10 according to the prior art.
  • the lighting device 10 is in Fig. 4 Which is a perspective view of the edge region is shown.
  • the optical attachment 104 comprises light-guiding elements 101a, 102a, 103a, which are arranged in three rectilinear rows 111, 112, 113 and extend on the radiating side to a common end plate 105.
  • the end plate 105 is limited on the emission side by a light exit surface 106, wherein the non-illustrated light exit surfaces of the individual light guide elements are each part of the common light exit surface 106, wherein individual light exit surfaces of the light guide 101a, 102a, 103a adjacent to each other in a conventional manner.
  • the common light exit surface 106 is typically a curved surface, which usually follows the Petzval surface of a downstream imaging optics (eg, an imaging lens) (not shown). For certain applications, deliberate deviations in the curvature of the common light exit surface 106 can also be used in order to additionally use aberrations for light homogenization in the edge region.
  • Each light-guiding element 101a, 102a, 103a is each assigned an LED light source 100.
  • the light input surfaces 101b, 102b, 103b of the light guide elements 101a, 102a, 103a are larger than the areas of the respective light sources 100 (eg, chip area of the LEDs).
  • the light sources 100 are positioned in the lighting device 10 so that they couple the light in the center of the light coupling surface 101b, 102b, 103b of the respective light guide.
  • the upper row is formed as a front row row 111 consisting of a plurality of apron light-guiding elements 101a.
  • the middle row is formed as an asymmetry row 112 consisting of a plurality of asymmetry light guide elements 102a
  • the lower row is formed as a high beam row 113 consisting of a plurality of high-beam light guide elements 103a.
  • the light guide elements 101a, 102a, 103a are funnel-shaped, wherein those of the high-beam light guide elements 103a, a larger cross-section in the direction of the light exit surface than those of the asymmetry 112th to have. For this reason, the pixels of the asymmetry row 112 have a higher luminance than those of the high-beam row 113.
  • the light sources 100 of the lighting arrangement 10 are arranged in a 3 * 28 pixel arrangement in a total of three linear LED rows 101, 102, 103 of 28 LEDs / row and form a light field 109.
  • the LEDs 100 are mounted in a conventional manner on a circuit board, not shown. Shown are the light-emitting surfaces in a regular arrangement.
  • the respective vertical distance between the LEDs 100 of the individual rows 101, 102, 103 is always constant, ie that the LEDs of one row of the LEDs of an adjacent row always have the same vertical spacing.
  • the illuminance can be controlled individually, which is why arbitrary light distributions can be realized. Referring to Fig. 1a and Fig.
  • the uppermost LED row 101 couples the light into the light guide elements 101a of the apron row 111.
  • the middle LED row 102 couples the light into the light guide elements 102a of the asymmetry row 112.
  • the lowermost LED row 103 couples the light into the light guide elements 103a of the high-beam row 113.
  • the apron row 111, the asymmetric row 112 and the high-beam row 113 together form a high-beam distribution in the activated state.
  • the LEDs 100 are energized to a greater extent in a central region 107 than in the peripheral regions 108 to the left and right of the central region 107, which is why the maximum of the light distribution lies in the central region 107.
  • the lower energization in the edge regions 108 may result in inhomogeneities, typically in the form of dark stripes in the edge regions 108, occurring between the rows of light distribution.
  • the inhomogeneities between the high-beam row 113 and the asymmetrical row 112 are usually particularly pronounced.
  • Fig. 1b shows an arrangement of LED light sources 200 in a pixel light-emitting device 20 according to the invention (see also Fig. 2 ).
  • the lighting device 20 is in the Fig. 2 showing a perspective view of a lighting device 20 according to the invention.
  • the optical attachment 204 is constructed identically to the optical attachment 104.
  • the optical attachment 204 consequently comprises optical fibers 201a, 202a, 203 a, which are arranged in three rectilinear rows 211, 212, 213 and the radiation side to a common end plate 205.
  • the front plate 205 is limited on the emission side by a light exit surface 206, wherein the non-illustrated light exit surfaces of the individual light guide 201a, 202a, 203a are each part of the common light exit surface 206, wherein individual light exit surfaces of the light guide 201a, 202a, 203a adjacent to each other in a conventional manner ,
  • the common light exit surface 206 is typically a curved surface, which usually follows the Petzval surface of a downstream imaging optics (eg, an imaging lens) (not shown). For certain applications, it is also possible to use deliberate deviations in the curvature of the common light exit surface 206 in order additionally to use aberrations for light homogenization in the edge region.
  • Each light-guiding element 201a, 202a, 203a of the optical attachment 204 is assigned an LED light source 200 each.
  • the light input surfaces 201b, 202b, 203b of the light guide elements 201a, 202a, 203a are larger than the areas of the respective LED light sources 200 (eg, chip area of the LEDs).
  • the upper row is formed as a front row row 211 consisting of a plurality of apron light-guiding elements 201a.
  • the middle row is formed as an asymmetry row 212 consisting of a plurality of asymmetry light guide elements 202a and the lower row is configured as a high beam row 213 consisting of a plurality of high-beam light guide elements 203a.
  • the light guide elements 201a, 202a, 203a are funnel-shaped, wherein those of the high-beam light guide elements 203a have a larger cross-section in the direction of the light exit surface than those of the asymmetry row 212. For this reason, the pixels of the asymmetry row 212 have a higher luminance than those of the high beam row 213.
  • the LED light sources 200 of the lighting arrangement 20 are arranged in a 3 * 28 pixel arrangement in a total of three LED rows 201, 202, 203 of 28 LEDs / row and form a light field 209.
  • the LEDs 200 are mounted in a conventional manner on a circuit board, not shown. For each LED 200, the illuminance can be controlled individually, which is why any light distribution can be realized.
  • the topmost LED row 201 couples the light into the light guide elements 201a of the front row row 211.
  • the middle LED row 202 couples the light into the light guide elements 202a of the asymmetry row 212.
  • the lowest LED row 203 couples the light into the light guide elements 203a of the high beam row 213.
  • the apron row 211, the asymmetrical row 212 and the high beam row 213 together form a high beam distribution in the activated state.
  • the LEDs 200 are energized to a greater extent in a central region 207 than in the edge regions 208 to the left and to the right of the central region 207, which is why the maximum of the light distribution lies in the central region 207.
  • the respective vertical distance between the LEDs 200 of the rows 201 and 202 (assigned to the front row row 211 or the asymmetrical row 212) is always the same, ie the LEDs of the front row row 211 always have the same vertical spacing from the LEDs of the asymmetrical row 212.
  • the inventive arrangement of the LED light sources 200 differs from the arrangement according to the prior art ( Fig. 1a ) in that the vertical distance between the LED light sources 200 of the high-beam row 213 and the LED light sources 200 of the upwardly adjacent row (ie, the asymmetry row 212) in the lateral edge regions 208 of the luminous field is smaller than in a central region 207 of FIG light field.
  • the LED light sources 200 are arranged symmetrically with respect to an optical axis.
  • the LED light sources 200 of the LED rows 201 and 202 and the LED light sources 200 in the central area 207 of the LED row 203 are positioned so that they receive the light in the center of the light coupling surface 201b, 202b, 203b of the respective light guide element 201a, 202a, Insert 203a.
  • the LED light sources 200 in the edge regions 208 of the LED row 203 are shifted upward from the center of the light coupling surface 203b of the respective light-guiding element 203a in the direction of the LED row 202 (ie assigned to the asymmetrical row 212) (see also Fig. 2 in which this shift is clearly visible).
  • the inventive arrangement of the LED light sources 200 in the edge regions 208 of the light field 209, the imhomogeneities in the light image, as they are known from the prior art can be reduced.
  • the arrangement according to the invention therefore represents a technically simple and cost-effective measure to locally influence the light distribution in pixel light illumination devices and thus to realize a more homogeneous light distribution in the edge regions 208 of the light field 209.
  • Fig. 1c shows a further variant of an arrangement of light sources (LEDs) 300 in a pixel light-emitting device 30 according to the invention.
  • the lighting device 30 is in Fig. 3 Which is a perspective view of the edge region is shown.
  • the attachment optics 304 comprises light-guiding elements 301a, 302a, 303a, which are arranged in three rectilinear rows 311, 312, 313 and extend on the radiating side to a common end plate 305.
  • the end plate 305 is limited on the emission side by a light exit surface 306, wherein the non-illustrated light exit surfaces of the individual light guide elements 301a, 302a, 303a are each part of the common light exit surface 306, wherein individual light exit surfaces of the light guide elements 301a, 302a, 303a adjoin one another in a conventional manner ,
  • the common light exit surface 306 is typically a curved surface, usually following the Petzval surface of a downstream imaging optic (not shown) such as an imaging lens.
  • a downstream imaging optic such as an imaging lens.
  • Each light-guiding element 301a, 302a, 303a of the optical attachment 304 is assigned an LED light source 300 each.
  • the light incident surfaces 301b, 302b, 303b of the light guiding elements 301a, 302a, 303a are larger than the areas of the respective LED light sources 300 (e.g., chip area of the LEDs).
  • the upper row is formed as a front row row 311 consisting of a plurality of apron light-guiding elements 301a.
  • the middle row is formed as an asymmetry row 312 consisting of a plurality of asymmetry light guide elements 302a, and the lower row is configured as a high beam row 313 consisting of a plurality of high beam light guide elements 303a.
  • the light guide elements 301a, 302a, 303a are funnel-shaped, and those of the high-beam light guide elements 303a have a larger cross section in the direction of the light exit surface than those of the asymmetry row 312. For this reason, the pixels of the asymmetry row 312 have higher luminance than those of the high-beam row 313.
  • the LED light sources 300 are arranged in a pixel arrangement in a total of three LED rows 301, 302, 303 of 25, 30, 28 LEDs and form a light field 309 (see. Fig. 1c ).
  • the LEDs 300 are mounted in a conventional manner on a circuit board, not shown. For each LED 300, the illuminance can be regulated individually, which is why arbitrary light distributions can be realized.
  • the uppermost LED row 301 couples the light into the light guide elements 301a of the front row row 311 of the optical attachment 304.
  • the middle LED row 302 couples the light into the light guide elements 302a of the asymmetry row 312 of the attachment optics 304.
  • the lowermost LED row 303 couples the light into the light guide elements 303a of the high-beam row 313 of the optical attachment 304.
  • the apron row 311, the asymmetry row 312 and the high beam row 313 together form a high beam distribution in the activated state.
  • the LEDs 300 are energized more strongly in a central area 307 than in the edge areas 308 to the left and to the right of the central area 307, which is why the maximum of the light distribution lies in the central area 307.
  • the vertical distance between the LEDs 300 of the rows 301 and 302 is always the same ( Fig. 1c ), ie the LEDs 300 of the front row row of the LEDs of the row of asymmetry always have the same vertical distance.
  • the inventive arrangement of the LED light sources 300 off Fig. 1c differs from the arrangement according to the prior art ( Fig.
  • the vertical distance between the LED light sources 300 of the row 303 (associated with the high beam row 313) and the LED light sources 300 of the upwardly adjacent LED row 302 (associated with the balancing row 312) in the lateral edge regions 308 of FIG In other words, the vertical distance between the light sources 300 of the high beam row and the light sources 300 of the asymmetry row, starting from the central region 307 to the edge regions 308 of the luminous field 309 successively decreases.
  • the horizontal distance between adjacent LED light sources 300 in the edge regions 308 of all three LED rows 301, 302, 303 in this embodiment increases towards the row edge.
  • the individual rows 301, 302 and 303 are also different in length.
  • the LED light sources 300 are arranged asymmetrically with respect to an optical axis 310.
  • the board on which the LED light sources 300 are mounted usually a common part.
  • the board is installed the same way in the left and right headlights for a motor vehicle.
  • the attachment optics 30 are available in mirror-symmetrical variants.
  • An imaging optics provided in the light emission direction is again an equal part but is arranged with mirror symmetry, for example with the aid of a lens holder.
  • the difference in the construction of the attachment optics 30 to the attachment optics 10 or 20 described above is that the light guide elements 301a, 302a, 303a are likewise displaced horizontally in accordance with the additional horizontal displacement of the LEDs 300 in the edge regions 308 (see FIG Fig. 3 ).
  • the LED light sources 300 of the LED rows 301 and 302 and the LED light sources 300 in the central area 307 of the LED row 303 are thus positioned so that they receive the light in the center of the light coupling surface 301b, 302b, 303b of the respective light guide element 301a, 302a , 303a.
  • the LED light sources 300 in the edge regions 308 of the LED row 303 are displaced upward from the center of the light coupling surface 303b of the respective light-conducting element 303a in the direction of the adjacent LEDs 300 of the asymmetry row 312.
  • the in the Fig. 2 and 3 illustrated light guide elements 201a, 202a, 203a and 301a, 302a, 303a may be made for example of silicone, plastic, glass or any other suitable for the light pipe materials.
  • the light-guiding elements 201a, 202a, 203a and 301a, 302a, 303a are designed as solid bodies and consist of a single continuous optical medium, wherein the light conduit takes place within this medium.
  • LEDs 200 and 300 can be eg Oslon Compact LEDs with light-emitting areas of 0.5 x 0.5 mm 2 .
  • the entire arrangement is about 10 cm wide.
  • the invention may be modified in any manner known to those skilled in the art and is not limited to the embodiment shown. Also, individual aspects of the invention can be taken up and largely combined with each other. Essential are the ideas underlying the invention, which in view of this doctrine can be performed by a person skilled in many ways and still remain maintained as such.

Claims (17)

  1. Dispositif d'éclairage (20, 30) pour un phare, en particulier un phare de véhicule automobile, comportant une pluralité de sources de lumière (200, 300) disposées adjacentes l'une à l'autre en rangées (201, 202, 203, 301, 302, 303), qui forment un champ lumineux (209, 309), et un dispositif de guidage de lumière (204, 304) ayant une pluralité d'éléments de guidage de lumière (201a, 202a, 203a, 301a, 302a, 303a), dans lequel à chaque élément de guidage de lumière (201a, 202a, 203a, 301a, 302a, 303a) est associée une source de lumière respective (200, 300), dans lequel chaque élément de guidage de lumière (201a, 202a, 203a, 301a, 302a, 303a) présente une surface de couplage de lumière respective (201b, 202b, 203b, 301b, 302b, 303b) pour le couplage de la lumière émise par la source de lumière respective, et une surface de sortie de lumière respective, dans lequel les éléments de guidage de lumière (201a, 202a, 203a, 301a, 302a, 303a) sont disposés en au moins deux rangées linéaires (211, 212, 213, 311, 312, 313) disposées l'une au-dessus de l'autre, et dans lequel les éléments de guidage de lumière (203a, 303a) de la rangée la plus basse (213, 313) sont conçus en tant qu'éléments de guidage de lumière de feux de route (201a, 301a) et forment une rangée de feux de route (213, 313),
    caractérisé par le fait que
    la distance verticale entre les sources de lumière (200, 300) de la rangée de feux de route (213, 313) et les sources de lumière (200, 300) de la rangée (212, 312) adjacente dans la direction vers le haut est plus petite dans au moins une région de bordure latérale (208, 308) du champ lumineux (209, 309) que dans une région centrale (207, 307) du champ lumineux (209, 309).
  2. Dispositif d'éclairage selon la revendication 1, caractérisé par le fait que la distance verticale entre les sources de lumière (200, 300) de la rangée de feux de route (213, 313) et les sources de lumière (200, 300) de la rangée (212, 312) adjacente dans la direction vers le haut diminue successivement en partant de la région centrale (207, 307) dans la direction d'au moins l'une des régions de bordure (208, 308).
  3. Dispositif d'éclairage selon la revendication 1, caractérisé par le fait que la distance verticale entre les sources de lumière (200, 300) de la rangée de feux de route (213, 313) et les sources de lumière (200, 300) de la rangée (212, 312) adjacente dans la direction vers le haut est plus petite dans les deux régions de bordure latérales (208, 308) du champ lumineux (209, 309) que dans la région centrale (207, 307) du champ lumineux (209, 309).
  4. Dispositif d'éclairage selon la revendication 3, caractérisé par le fait que la distance verticale entre les sources de lumière (200, 300) de la rangée de feux de route (213, 313) et les sources de lumière de la rangée (212, 312) adjacente dans la direction vers le haut diminue successivement en partant de la région centrale (207, 307) dans la direction des deux régions de bordure (208, 308).
  5. Dispositif d'éclairage selon l'une des revendications 1 à 4, caractérisé par le fait que les sources de lumière (200, 300) de la rangée de feux de route (213, 313), qui sont disposées dans la région centrale (207, 307) du champ lumineux (209, 309), sont positionnées de telle sorte qu'elles couplent la lumière au centre de la surface de couplage de lumière (201b, 301b) de l'élément de guidage de lumière respectif (201a, 301a).
  6. Dispositif d'éclairage selon l'une des revendications 1 à 5, caractérisé par le fait que la distance horizontale entre des sources de lumière adjacentes (300) augmente dans au moins l'une des régions de bordure (308) du champ lumineux (309) dans la direction de la bordure de rangée.
  7. Dispositif d'éclairage selon la revendication 6, caractérisé par le fait que la distance horizontale entre des sources de lumière adjacentes (300) augmente dans les deux régions de bordure (308) dans la direction de la bordure de rangée.
  8. Dispositif d'éclairage selon l'une des revendications 1 à 7, caractérisé par le fait que les sources de lumière (200) sont disposées symétriquement par rapport à un axe optique (210).
  9. Dispositif d'éclairage selon l'une des revendications 1 à 7, caractérisé par le fait que les sources de lumière (300) sont disposées de façon non symétrique par rapport à un axe optique (310).
  10. Dispositif d'éclairage selon l'une des revendications 1 à 9, caractérisé par le fait que les rangées individuelles (301, 302, 303) de sources de lumière (300) ont des longueurs différentes.
  11. Dispositif d'éclairage selon l'une des revendications 1 à 10, caractérisé par le fait que les éléments de guidage de lumière (201a, 202a, 203a, 301a, 302a, 303a) sont disposés en précisément trois rangées (211, 212, 213, 311, 312, 313) disposées l'une au-dessus de l'autre, qui forment ensemble une distribution de feux de route, la rangée la plus basse étant la rangée de feux de route (213, 313).
  12. Dispositif d'éclairage selon l'une des revendications 1 à 11, caractérisé par le fait que les surfaces de sortie de lumière des éléments de guidage de lumière (201a, 202a, 203a, 301a, 302a, 303a) font partie d'une surface de sortie de lumière commune (206, 306), des surfaces de sortie de lumière individuelles étant limitrophes.
  13. Dispositif d'éclairage selon l'une des revendications 1 à 12, caractérisé par le fait que les sources de lumière (200, 300) sont des diodes électroluminescentes (LED), lesquelles, de préférence, sont commandées individuellement.
  14. Dispositif d'éclairage selon l'une des revendications 1 à 13, caractérisé par le fait que les éléments de guidage de lumière (201a, 202a, 203a, 301a, 302a, 303a) sont réalisés en tant qu'éléments guides d'ondes optiques.
  15. Dispositif d'éclairage selon l'une des revendications 1 à 14, caractérisé par une optique d'imagerie disposée en aval du dispositif de guidage de lumière (204, 304).
  16. Dispositif d'éclairage selon la revendication 15, caractérisé par le fait que l'optique d'imagerie comporte une ou plusieurs lentilles optiques.
  17. Phare de véhicule automobile comportant un dispositif d'éclairage (20, 30) selon l'une des revendications 1 à 16.
EP16766219.6A 2015-09-17 2016-09-05 Ensemble de sources lumineuses dans un module de lumière de pixel Active EP3350505B1 (fr)

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ATA50798/2015A AT517699B1 (de) 2015-09-17 2015-09-17 Lichtquellen-Anordnung in einem Pixellicht-Lichtmodul
PCT/AT2016/060050 WO2017045000A1 (fr) 2015-09-17 2016-09-05 Ensemble de sources lumineuses dans un module de lumière de pixel

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EP3350505A1 (fr) 2018-07-25
JP6490306B2 (ja) 2019-03-27
US10139068B2 (en) 2018-11-27
JP2018527723A (ja) 2018-09-20
AT517699A4 (de) 2017-04-15
US20180245759A1 (en) 2018-08-30
WO2017045000A1 (fr) 2017-03-23
CN108055863A (zh) 2018-05-18
AT517699B1 (de) 2017-04-15

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