EP3350505A1 - Ensemble de sources lumineuses dans un module de lumière de pixel - Google Patents

Ensemble de sources lumineuses dans un module de lumière de pixel

Info

Publication number
EP3350505A1
EP3350505A1 EP16766219.6A EP16766219A EP3350505A1 EP 3350505 A1 EP3350505 A1 EP 3350505A1 EP 16766219 A EP16766219 A EP 16766219A EP 3350505 A1 EP3350505 A1 EP 3350505A1
Authority
EP
European Patent Office
Prior art keywords
light
row
light sources
lighting device
high beam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP16766219.6A
Other languages
German (de)
English (en)
Other versions
EP3350505B1 (fr
Inventor
Josef Plank
Lukas Taudt
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
Original Assignee
ZKW Group GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ZKW Group GmbH filed Critical ZKW Group GmbH
Publication of EP3350505A1 publication Critical patent/EP3350505A1/fr
Application granted granted Critical
Publication of EP3350505B1 publication Critical patent/EP3350505B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—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]
    • F21S41/143—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
    • F21S41/10—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
    • 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 Lichteinkoppel contribution 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 designed 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 the automotive industry and serve, for example, the imaging of glare-free high beam by the light is usually emitted by a plurality of artificial light sources and by a corresponding plurality of juxtaposed light guides (attachment optics / Primary optics) is focused in the emission direction.
  • the light guides have a relatively small cross-section and therefore send the light of their respective individual light sources very concentrated in the
  • Pixel light emitters are very flexible in terms of light distribution because for each pixel, i. For every light guide, the illuminance can be controlled individually and any light distribution can be realized.
  • DE 10 2008 044 968 AI discloses a lighting device with a plurality of light sources arranged on a light source, which form a light-emitting diode array, which consists of several Lines linearly arranged side by side light emitting diodes, 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 AI is based on the object, the total number of light sources required and thus the
  • 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 row of light-emitting LEDs has as at least one second row.
  • 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 takes place, for example, in the case of LEDs by default
  • Pulse width modulation of the operating current with a time average different current to 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.
  • Edge regions of the luminous field based, 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 proceed from the central area (no shift) outwards into the respective border areas (largest shift)
  • 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 vertical distance between the light sources of the high beam row and the light sources of the upwardly adjacent row starting from the central area to at least one of the edge areas successively, so gradually, decreases, wherein in each step, one or more light sources 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 only in a lateral
  • Edge area of the light field smaller than in a central area of the light 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. With regard to the invention, it is therefore advantageous if the light sources of the high beam row which are in the
  • Central area of the light field are arranged, are positioned so that they couple the light in the center of the light input surface of the respective light guide element. All the light sources of the other rows couple the light with advantage in the center of the
  • 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 guide device Taking into account the imaging optics, the light guide device
  • the light sources may be arranged either symmetrically or asymmetrically with respect to an optical axis. In further developments, it may be provided for lighting reasons that the individual rows of light sources have different lengths. It can be used to match the resolution in each area to the requirements of a specific skip scenario.
  • 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.
  • Light guide elements therefore be part of a common light exit surface, wherein the individual light exit surfaces adjacent to each other.
  • the common light exit surface is typically a curved surface, usually the Petzval surface of the
  • Imaging optics e.g., an imaging lens
  • deliberate deviations in the curvature can also be used in order to achieve the desired results
  • the light sources are suitably light emitting diodes (LEDs), the LEDs
  • 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 pipe 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 (LEDs) in a pixel light illumination device according to the prior art
  • FIG. 1b shows an arrangement of light sources (LEDs) in a pixel light illumination device according to the invention
  • FIG. 2 shows a perspective view of a lighting device according to the invention with an arrangement of light sources according to FIG.
  • FIG. 3 shows a perspective view of an edge region of a lighting device according to the invention with an arrangement of light sources according to FIG. 1c
  • FIG. 4 shows a perspective view of an edge region of a luminous device according to the prior art with an arrangement of light sources according to FIG.
  • FIG. 1 a shows an arrangement of light sources 100 (LEDs 100) in a pixel light illumination device 10 according to the prior art.
  • the lighting device 10 is shown in Fig. 4, which shows a perspective view of its edge region.
  • Lighting device 10 includes a plurality of LED light sources 100 and a in
  • 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 front plate 105 is the emission side limited by a light emission surface 106, wherein the light exit surfaces of the individual light guide elements, not shown in each case part of the common light exit surface 106, wherein individual light exit surfaces of
  • the common light exit surface 106 is typically a curved surface, usually the Petzval surface of a downstream not shown
  • Imaging optics e.g., an imaging lens
  • Each light-guiding element 101a, 102a, 103a is assigned an LED light source 100 each.
  • Light guide elements 101a, 102a, 103a are larger than the areas of the respective light sources 100 (e.g., 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 as
  • Asymmetry row 112 consisting of a plurality of asymmetry light guide elements 102a and the lower row is formed as a high beam row 113 consisting of a plurality of high beam light guide elements 103a.
  • the light-guiding elements 101a, 102a, 103a are
  • 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
  • the respective vertical distance between the LEDs 100 of the individual rows 101, 102, 103 is always constant, i. that the LEDs of one row of the LEDs of an adjacent row always have the same vertical distance.
  • the illuminance can be controlled individually, which is why arbitrary light distributions can be realized. Referring to FIGS. 1 a and 4, the uppermost LED row 101 couples the light into the
  • Light guide elements 101a of the apron row 111 a 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 illumination device 20 according to the invention (see also FIG. 2).
  • the lighting device 20 is shown in more detail in FIG. 2, which is a perspective view of a
  • Lighting device 20 according to the invention shows.
  • the lighting device 20 comprises a plurality of LED light sources 200 and a light guide device 204 positioned in the light emission direction, hereinafter referred to as
  • 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 face plate 205 is limited on the emission side by a light exit surface 206, wherein the light exit surfaces, not shown, of the individual light guide elements 201a, 202a, 203a each part of the common
  • Light exit surface 206 wherein individual light exit surfaces of the light guide elements 201a, 202a, 203a adjacent to each other in a conventional manner.
  • Light exit surface 206 is typically a curved surface, usually following the Petzval surface of a downstream imaging optic (not shown) such as an imaging lens. 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 incident surfaces 201b, 202b, 203b of the light guide elements 201a, 202a, 203a are larger than the areas of the respective LED light sources 200 (e.g., 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 as
  • Asymmetry row 212 consisting of a plurality of asymmetry light guide elements 202a and the lower row is formed as a high beam row 213 consisting of a plurality of high beam light guide elements 203a.
  • the light-guiding elements 201a, 202a, 203a are
  • 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
  • the top LED row 201 couples the light into the light guide elements 201 a 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 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 (associated with the front row 211 and the second row 212, respectively) is always the same, i. the LEDs of the front row row 211 always have the same vertical distance from the LEDs of the asymmetrical row 212.
  • the arrangement of the LED light sources 200 according to the invention differs from the arrangement according to the prior art (FIG. 1 a) in that the vertical distance between the LED light sources 200 of the high beam row 213 and the LED light sources 200 is adjacent to the uppermost Row (ie, the asymmetry row 212) in the lateral edge regions 208 of the light field is smaller than in a
  • Asymmetry row 212 starting from the central region 207 to the edge regions 208 of the light field 209 successively, i. gradually from LED to LED, down.
  • 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 array 203 i.e., associated with the high beam row 213) are out of the center of the light coupling surface 203b of the respective one
  • Light guide 203a towards the top of the LED array 202 i.e.
  • FIG. 1 c shows a further variant of an arrangement of light sources (LEDs) 300 in a pixel light illumination device 30 according to the invention.
  • the lighting device 30 is shown in Fig. 3, which shows a perspective view of its edge region.
  • the lighting device 30 comprises a plurality of LED light sources 300 and a light guide device 304 positioned in the light emission direction, hereinafter referred to as
  • 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 front plate 305 is the emission side limited by a light exit surface 306, wherein the not closer
  • 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 adjacent to each other in a conventional manner.
  • the common light exit surface 306 is typically a curved surface, usually the Petzval surface of a downstream not shown
  • Imaging optics e.g., an imaging lens
  • deliberate deviations in the curvature of the common light exit surface 306 can also be used in order additionally to produce aberrations in the edge region
  • 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 as
  • Asymmetry row 312 consisting of a plurality of asymmetry Lichtleitmaschinen 302 a and the lower row is formed as a high beam row 313 consisting of a plurality of high beam Lichtleitmaschinen 303 a.
  • the light guide elements 301a, 302a, 303a are
  • 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. Lc).
  • 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 spacing between the LEDs 300 of the rows 301 and 302 is always constant (Fig. the LEDs 300 of the front row row always have the same vertical distance from the LEDs of the row of asymmetry.
  • the arrangement according to the invention of the LED light sources 300 of FIG. 1 c thus differs from the arrangement according to the prior art (FIG. 1 a) in that the vertical distance between the LED light sources 300 is assigned to the row 303 (associated with the high beam row 313) and the LED light sources 300 of the upwardly adjacent LED array 302 (assigned to the asymmetry row 312) in the lateral edge regions 308 of the light field 309 is smaller than in a central region 307 of the light field 309. In other words, the vertical distance between the light sources 300 increases the high beam row and the
  • Edge regions 308 of the luminous field 309 successively from.
  • 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.
  • Headlight module is 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 symmetry
  • An imaging optics provided in the light emission direction is then again a common part, but becomes, e.g. with the help of a lens holder, mirror-symmetrically shifted.
  • the difference in the construction of the attachment optics 30 to the attachment optics 10 or 20 described above lies in the fact that the light guide elements 301a, 302a, 303a are likewise displaced horizontally correspondingly due to the additional horizontal displacement of the LEDs 300 in the edge regions 308 (see 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 consequently 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 array 303 i.e., associated with the high beam row 313) are, according to the invention, out of the center of the light coupling surface 303b of the respective one
  • Asymmetry row 312 shifted.
  • the light guide elements 201a, 202a, 203a or 301a, 302a, 303a shown in FIGS. 2 and 3 can be made, for example, of silicone, plastic, glass or any other materials suitable for light conduction.
  • 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.
  • the LEDs 200 and 300 may be, for example, Oslon compact LEDs with light-emitting areas of 0.5 ⁇ 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.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

L'invention concerne un dispositif d'éclairage (20, 30) destiné à un projecteur, en particulier à un projecteur de véhicule automobile, et comprenant une pluralité de sources lumineuses (200, 300) agencées en rangées (201, 202, 203, 301, 302, 303) les unes à côté des autres, qui forment un champ lumineux (209, 309), et un dispositif de guidage de la lumière (204, 304) muni d'une pluralité d'éléments de guidage de la lumière (201a, 202a, 203a, 301a, 302a, 303a). Une source lumineuse (200, 300) est associée à chacun des éléments de guidage de la lumière (201a, 202a, 203a, 301a, 302a, 303a), chaque élément de guidage de la lumière (201a, 202a, 203a, 301a, 302a, 303a) présente respectivement une surface d'injection de la lumière (201b, 202b, 203b, 301b, 302b, 303b) servant à l'injection de la lumière émise par la source lumineuse concernée et une surface de sortie de la lumière, les éléments de guidage de la lumière (201a, 202a, 203a, 301a, 302a, 303a) sont agencés en au moins deux rangées rectilignes (211, 212, 213, 311, 312, 313) disposées l'une au-dessus de l'autre, et les éléments de guidage de la lumière (203a, 303a) de la rangée inférieure (213, 313) sont réalisés sous la forme d'éléments de guidage de la lumière de feu de route (201a, 301a) et forment une rangée de feu de route (213, 313). La distance verticale entre les sources lumineuses (200, 300) de la rangée de feu de route (213, 313) et les sources lumineuses (200, 300) de la rangée adjacente vers le haut (212, 312) est plus petite dans au moins une zone périphérique latérale (208, 308) du champ lumineux (209, 309) que dans un zone centrale (207, 307) du champ lumineux (209, 309).
EP16766219.6A 2015-09-17 2016-09-05 Ensemble de sources lumineuses dans un module de lumière de pixel Active EP3350505B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
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

Publications (2)

Publication Number Publication Date
EP3350505A1 true EP3350505A1 (fr) 2018-07-25
EP3350505B1 EP3350505B1 (fr) 2019-06-05

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EP16766219.6A Active EP3350505B1 (fr) 2015-09-17 2016-09-05 Ensemble de sources lumineuses dans un module de lumière de pixel

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US (1) US10139068B2 (fr)
EP (1) EP3350505B1 (fr)
JP (1) JP6490306B2 (fr)
CN (1) CN108055863A (fr)
AT (1) AT517699B1 (fr)
WO (1) WO2017045000A1 (fr)

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Also Published As

Publication number Publication date
AT517699A4 (de) 2017-04-15
US10139068B2 (en) 2018-11-27
AT517699B1 (de) 2017-04-15
WO2017045000A1 (fr) 2017-03-23
JP2018527723A (ja) 2018-09-20
US20180245759A1 (en) 2018-08-30
EP3350505B1 (fr) 2019-06-05
JP6490306B2 (ja) 2019-03-27
CN108055863A (zh) 2018-05-18

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