EP2786064B1 - Unité d'éclairage pour un projecteur - Google Patents

Unité d'éclairage pour un projecteur Download PDF

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Publication number
EP2786064B1
EP2786064B1 EP13795987.0A EP13795987A EP2786064B1 EP 2786064 B1 EP2786064 B1 EP 2786064B1 EP 13795987 A EP13795987 A EP 13795987A EP 2786064 B1 EP2786064 B1 EP 2786064B1
Authority
EP
European Patent Office
Prior art keywords
light
light guide
partition walls
diaphragm element
lighting unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP13795987.0A
Other languages
German (de)
English (en)
Other versions
EP2786064A1 (fr
Inventor
Josef Gürtl
Josef Plank
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
Zizala Lichtsysteme GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Zizala Lichtsysteme GmbH filed Critical Zizala Lichtsysteme GmbH
Publication of EP2786064A1 publication Critical patent/EP2786064A1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—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
    • F21S41/24—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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/29—Attachment thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
    • 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
    • F21S41/36—Combinations of two or more separate reflectors
    • 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
    • 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
    • F21S41/25—Projection lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/322—Optical layout thereof the reflector using total internal reflection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0083—Array of reflectors for a cluster of light sources, e.g. arrangement of multiple light sources in one plane
    • 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
    • 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
    • F21W2102/17—Arrangement or contour of the emitted light for regions other than high beam or low beam
    • F21W2102/19—Arrangement or contour of the emitted light for regions other than high beam or low beam for curves
    • 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
    • F21W2102/20—Illuminance distribution within the emitted light
    • 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
    • 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 unit for a headlight, in particular a motor vehicle headlight, comprising a plurality of light sources, a light guide unit with a plurality of light guides and a downstream projection lens, each light guide each having a light output surface, and wherein each light source exactly into a light guide associated therewith coupled, and wherein adjacent light guides are separated by partitions.
  • the invention relates to a vehicle headlight for a motor vehicle with at least one such lighting unit.
  • a lighting function such as a light source.
  • a lighting function such as a light source.
  • These partial light distributions can be individually controlled by individual control of the light sources, so that, for example, parts of the light distribution can be selectively hidden or dimmed or only certain parts of the light distribution can be operated or dimmed. This makes it possible to control the light distribution as a function of the driving situation almost arbitrarily.
  • Functions which can be realized with this technique are e.g. Partial distance light, in which the glare reduction of the oncoming traffic segments in the light image of the high beam distribution are switched, shifting the light center in the low beam (see bends), reduction of the apron light distribution for the purpose of glare-free oncoming traffic on wet roads (bad weather light), etc.
  • the individual light segments in the light distribution are generated by means of light guides, which are joined together to form a light guide unit, and through which light guides emitted by the artificial light sources are focused in the emission direction.
  • 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.
  • a light module discloses which comprises a light guide in the form of a light guide, referred to therein as a light tunnel, and a plurality of light sources.
  • the concentrated radiation of the light guides is desirable to meet, for example, legal requirements regarding the light-dark line of the dipped beam of a motor vehicle headlight.
  • sharply delimited light segments generated by the light guides have the advantage that exactly limited areas can be hidden in a light image.
  • the light guides are separated from each other.
  • a light guide unit which has a number of light guides, in one piece (or in two parts, one in the light exit direction and a rear part - this is for the present invention, however, incidentally), and the individual light guides are from each other separated, specifically by walls or dividers, which extend in the light exit direction into the region of the light outcoupling surfaces of the individual light guides.
  • the light guide units are made of metal or plastic, in a two-part construction as briefly mentioned above, the two parts can also be made of different materials.
  • the "one-piece" production of the light guide unit with the light guides formed in it has the disadvantage that the wall thickness of the (dividing) walls or (separating) webs between adjacent light guides in the region of the light outcoupling surfaces of the light guides has a certain value, the production technology can not be reached or only with great manufacturing effort.
  • an excessive wall thickness of the partitions between the light guides leads to the formation of stripes, in particular vertical and / or horizontal stripes, in the photograph.
  • a generic light unit is from the Scriptures WO 2011/121488 A1 known.
  • the object is achieved with a lighting unit mentioned above in that according to the invention between the light guide unit and the projection lens at least one Aperture element is arranged, which aperture element from each other by aperture opening partitions has separate apertures, wherein the aperture element is arranged such that in each case an aperture of a Lichtauskoppel constitutional is connected upstream, and wherein the apertures correspond in shape and size substantially to their respective associated Lichtauskoppel lake, and wherein on the surfaces of the at least one diaphragm element facing away from the light guide unit, at least part of the diaphragm opening partition walls has a smaller wall thickness than the partition wall of the at least one light guide unit assigned to the respective diaphragm opening partition wall.
  • an aperture element with aperture openings which correspond to the light outcoupling surfaces of the light guides in the light guide unit can be made much simpler with a wall thickness of the aperture partitions that is (significantly) less than the thickness of the partitions of the light guides in the area of their light outcoupling surfaces, so that by interposing such a diaphragm element between light guide unit and projection lens in a simple manner, the distance between the individual light segments generated by the individual light guides in the light image can be significantly reduced or completely eliminated. In this way, stripes in the photograph can be reduced or completely eliminated.
  • the light guides are arranged in at least two rows arranged one above the other, wherein preferably the light guides are arranged in exactly three rows arranged one above the other.
  • light segments can also be hidden in the vertical direction (vertically with respect to a measuring wall arranged at a certain distance, for example of 10 or 25 meters).
  • At least one separate diaphragm element is provided for each row of light guides or at least for one of the rows.
  • all the light outcoupling surfaces lie in a common, possibly curved plane.
  • one of the rows or a plurality of rows are offset from each other in the light exit direction.
  • a "flat" aperture element can rest only on the foremost row of light guides, while the other rows are spaced apart by the return of these rows. If a distance produces photometrically negative effects on the light image, in order to minimize or completely eliminate the distance diaphragm element light guides, it may be provided that the diaphragm element is correspondingly shaped at suitable locations, e.g. is bent over, and thus follows the shape of the light exit surface of the light guide unit.
  • the at least one diaphragm element lies substantially in a focal plane of the projection lens.
  • the surface of the light guide unit formed by the light outcoupling surfaces of the light guides is not flat, but rather is curved in the direction of the focal plane of the projection lens, ie horizontally and preferably also vertically in the direction of the lens.
  • the diaphragm element is correspondingly curved and formed congruent to this surface.
  • the light outcoupling surfaces lie in the focal plane of the projection lens.
  • the diaphragm element is formed as thin as possible in the light exit direction, so that the lens facing surface of the diaphragm element, which now yes defines the actual light output surface, as close to the focal plane of the projection lens.
  • the light outcoupling surfaces are offset at least by the thickness of the diaphragm element in the light exit direction to the rear, so that the lens-side surface of the diaphragm element can then be arranged exactly in the focal plane of the projection lens.
  • the at least one diaphragm element is arranged to contact the light guide unit directly, preferably the light guide unit in the area of its surface formed by the light output surfaces.
  • the lens-side surface of the diaphragm element can be arranged as exactly as possible in the focal plane of the projection lens.
  • the wall thickness of the diaphragm opening partitions is constant over the entire thickness of the at least one diaphragm element. In this case, it must be strived to manufacture the aperture opening partitions in their respective entirety with the smallest possible wall thickness.
  • the wall thickness of the aperture opening partitions over the thickness of the at least one aperture element in Reduced light exit direction wherein preferably the width of the diaphragm opening partitions on the surface facing the light guide unit corresponds in each case to the wall thickness of the associated partitions between the light guides, in particular in the region of the light outcoupling surfaces of the light guides.
  • the light guides are each bounded by two substantially vertical walls and two substantially horizontal walls, and preferably the light output surfaces of the light guides defined by the walls form a rectangle or a square.
  • a light guide is therefore usually limited in each case by four walls, with adjacent light guides or superimposed light guides, the common walls are referred to as partitions or represent such.
  • Those walls, which are located as partitions between superposed light guides usually run horizontally (terms such as horizontal and vertical always refer to the light unit in installation position), while the upper and lower walls of the top / bottom row of light guides opposite Directed light emission direction can also be formed slightly curved downwards / upwards, which is why the term "essentially” was used.
  • At least the vertical and / or horizontal partitions between the light guides associated aperture openings on the surface facing away from the light guide unit have a smaller wall thickness than the associated partitions of the light guide unit, preferably all the partitions between the Assigned to light guides Aperture partition walls on the surfaces remote from the light guide unit surfaces have a smaller wall thickness than the associated partitions of the light guide unit.
  • the at least one diaphragm element is made of a metal, e.g. a sheet or a metal foil or a plastic, preferably a temperature-resistant plastic is formed.
  • metal in particular the use of a metal foil has the advantage that it is thin, heat-resistant and resistant.
  • plastic has the advantage that it can be shaped more easily than metal.
  • plastic still has to be coated with a reflective or (highly) lustrous layer, for example, with aluminum.
  • the panel element is typically attached directly to the light guide unit, such as riveted, welded, glued, screwed or clamped.
  • the diaphragm-opening partitions are formed reflecting light, in particular highly reflective.
  • Metal such as a metal foil or a sheet metal element is usually dull on one side, glossy on the other. If you use shiny metal on both sides, formed in a stamping process, with which the apertures are punched into the metal, continuously with reflective partitions limited apertures.
  • the metal is highly reflective, that is, has a reflectance greater than or equal to 95%.
  • aperture openings are coated, for example coated, on their inner surfaces, for example with a reflective layer.
  • the apertures are made in the aperture element material by means of punching, in particular by means of fine blanking or by means of laser cutting.
  • Laser cutting is particularly suitable for producing aperture opening partitions with a constant wall thickness throughout, while in a stamping process the partitions can be produced with a wall thickness of the aperture opening partitions which tapers over the thickness of the aperture element as described above.
  • the light sources are LED light sources, wherein each LED light source comprises at least one light emitting diode.
  • each LED light source can be controlled separately and switched on and off and / or dimmed, wherein preferably each LED of an LED light source can be controlled separately and switched on and / or dimmbar.
  • the at least one diaphragm element is designed as a flat component, that is to say has a significantly smaller thickness than width and height.
  • Typical values for the width of a panel are about 70mm, the height of the panel is about 20mm and the thickness is on the order of 2mm. These values are purely exemplary and are merely illustrative of the dimensions.
  • the light sources 2 are LED light sources, each LED light source 2 comprising at least one or exactly one light-emitting diode.
  • each LED light source 2 is separately controlled and switched on and off and / or dimmable, preferably with two or more light emitting diodes per LED light source each LED of a LED light source separately controlled and on or off and / or dimmable is.
  • the light guide unit 3 has a two-part construction of two components 3a, 3b, which in the assembled state of the lighting unit 1 directly abut each other and are connected to each other.
  • the light guide unit 3 can just as well be formed from only one component, this is for the invention of secondary importance, which is why this issue will not be discussed further here.
  • the light guides 30 are arranged in the light guide unit 3 next to one another and in the example shown in three superimposed rows.
  • the light guides 30 are aligned substantially in the direction of an optical axis x associated with the projection lens.
  • the light guides 30 are designed as reflectors, thus forming a quasi hollow tube, and have light outcoupling surfaces 30a, which are adapted to emit the light in the direction of the downstream projection lens 4.
  • the light outcoupling surfaces 30a as well as the unrecognizable light coupling surfaces are thus limited openings in the light guide unit 3.
  • these light guide units are used as e.g. are formed separate light guide body.
  • the light guides 30 are respectively bounded by two substantially vertical walls and two substantially horizontal walls, the light guides 30 of the upper and lower rows are rectangular in the example shown, while the light guides of the middle row are square.
  • the vertical walls 31 each delimit and separate laterally juxtaposed light guides 30, and in addition, the light guides 30 of the middle row are separated from the upper and lower ones by the horizontal partitions 32, respectively.
  • These dividing walls 31, 32 now have a certain wall thickness a in the area of the light outcoupling surfaces 30a due to manufacturing technology (see, for example, FIGS FIG. 3 . FIG. 5 ), so that in the photograph between the activated light segments form vertical and horizontal stripes, as in FIG. 6 is shown schematically.
  • FIG. 1 shown in an exploded view between the light guide unit 3 and the projection lens 4, a diaphragm element 5 is arranged.
  • This diaphragm element 5 has aperture openings 50 separated from one another by diaphragm partitions 51, 52, as shown in particular in FIGS Figures 3 - 5 easy to recognize.
  • the diaphragm element 5 is arranged in relation to the light guide unit 3 such that in each case one aperture 50 of the diaphragm element 5 is connected upstream of a light coupling-out surface 30a of the light guide unit 3, in particular such that the light coupling surfaces 30a are completely free, i. not covered by material of the diaphragm element.
  • the apertures 50 are formed such that they correspond in shape and size substantially to their respective associated light outcoupling surfaces 30a. Furthermore, it is provided according to the invention that on the light guide unit 3 facing away surfaces 5a of the diaphragm element 5, the diaphragm opening partitions 51, 52 which limit the apertures 50 and adjacent apertures 50 separate from each other, have a smaller wall thickness b than that of the respective aperture opening Partition wall 51, 52 associated partition wall 31, 32 of the respective light guide 30 in the region of their light output surface 30a. This situation is in FIGS. 3 and 4 good to recognize, as well as in FIG. 5 ,
  • FIG. 3 shows the situation for better clarity in an exploded representation
  • FIG. 4 and 5 show the actual situation in which the diaphragm element 5 is as close as possible to the light guide unit or preferably contacts it.
  • FIG. 1 and 3 which show the aperture element 5 at a (large) distance from the light guide unit 3 for better recognizability of the technical features, that the aperture element 5 immediately following the light guide unit 3, preferably the light guide unit 3 in the area of their surface formed by the light outcoupling surfaces 30a contacting is arranged.
  • the aperture element 5 lies substantially in the focal plane of the projection lens 4.
  • the surface of the light guide unit 3 formed by the light outcoupling surfaces 30a of the light guides 30 is not flat but as in FIG FIG. 1 as well as the FIGS. 3 and 4 Good to recognize according to the course of the focal plane of the projection lens, that is formed both horizontally and preferably also curved vertically in the direction of the lens.
  • the diaphragm element 5 is correspondingly curved and formed congruent to this surface.
  • the light outcoupling surfaces 30a are in the focal plane of the projection lens 4.
  • the light outcoupling surfaces 30a are offset at least by the thickness d of the diaphragm element 5 in the light exit direction to the rear, so that the lens-side surface 5a of the diaphragm element 5 can be arranged exactly in the focal plane of the projection lens 4.
  • the wall thickness b_ of the diaphragm-partitions 51, 52 may be constant over the entire thickness d of the diaphragm element 5, or, as in FIGS FIGS. 3 to 5 shown, the wall thickness b of the diaphragm opening partition walls 51, 52 can decrease over the thickness d of the diaphragm element 5 in the light exit direction.
  • the wall thickness of the diaphragm opening partition walls 51, 52 on the surface 5b facing the light guide unit 3 corresponds in each case to the wall thickness a of the associated partition walls 31, 32 between the light guides 30 in the region of the light output surfaces 30a.

Landscapes

  • 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)
  • Planar Illumination Modules (AREA)

Claims (15)

  1. Unité d'éclairage (1) pour un phare, en particulier un phare de véhicule automobile, comprenant une pluralité de sources de lumière (2), une unité de guidage de lumière (3) comportant une pluralité de guides de lumière (30) et une lentille de projection (4) disposée en aval, chaque guide de lumière (30) présentant chacun une surface de découplage de lumière (30a), et chaque source de lumière (2) couplant la lumière exactement dans un guide de lumière (30) qui lui est associé, et des guides de lumière adjacents (30) étant séparés l'un de l'autre par des parois de séparation (31, 32), caractérisée par le fait que
    au moins un élément diaphragme (5) est disposé entre l'unité de guidage de lumière (3) et la lentille de projection (4), lequel élément diaphragme (5) présente des ouvertures de diaphragme (50) séparées les unes des autres par des parois de séparation d'ouvertures de diaphragme (51, 52), l'élément diaphragme (5) étant disposé de telle sorte qu'à chaque fois une ouverture de diaphragme (50) est disposée en amont d'une surface de découplage de lumière (30a), et les ouvertures de diaphragme (50) correspondant sensiblement en forme et en dimension aux surfaces de découplage de lumière (30a) qui leur sont respectivement associées, et, sur les surfaces (5a) de l'au moins un élément diaphragme (5) opposées à l'unité de guidage de lumière (3), au moins une partie des parois de séparation d'ouvertures de diaphragme (51, 52) présentant une épaisseur de paroi (b) plus petite que les parois de séparation (31, 32) de l'unité de guidage de lumière (3) qui sont associées aux parois de séparation d'ouvertures de diaphragme (51, 52) respectives.
  2. Unité d'éclairage selon la revendication 1, caractérisée par le fait qu'exactement un élément diaphragme (5) est prévu, lequel présente un nombre d'ouvertures de diaphragme (50) correspondant au nombre des surfaces de découplage de lumière (30a).
  3. Unité d'éclairage selon l'une des revendications 1 ou 2, caractérisée par le fait que les guides de lumière (30) sont disposés dans au moins deux rangées superposées, les guides de lumière (30) étant disposés, de préférence, dans exactement trois rangées superposées, au moins un élément diaphragme propre étant prévu, de préférence, pour chaque rangée de guides de lumière (30) ou au moins pour l'une des rangées.
  4. Unité d'éclairage selon l'une des revendications 1 à 3, caractérisée par le fait que l'au moins un élément diaphragme (5) se trouve sensiblement dans un plan focal de la lentille de projection (4).
  5. Unité d'éclairage selon l'une des revendications 1 à 4, caractérisée par le fait que l'au moins un élément diaphragme (5) est disposé directement sur l'unité de guidage de lumière (3), puis, de préférence, l'unité de guidage de lumière (3) est disposée, avec mise en contact, dans la zone de sa surface formée par les surfaces de découplage de lumière (30a).
  6. Unité d'éclairage selon l'une des revendications 1 à 5, caractérisée par le fait que l'épaisseur de paroi (b) des parois de séparation d'ouvertures de diaphragme (51, 52) est constante sur toute l'épaisseur (d) de l'au moins un élément diaphragme (5), ou l'épaisseur de paroi (b) des parois de séparation d'ouvertures de diaphragme (51, 52) s'amincit sur l'épaisseur (d) de l'au moins un élément diaphragme (5) dans la direction de sortie de lumière, l'épaisseur de paroi des parois de séparation d'ouvertures de diaphragme sur la surface (5b) opposée à l'unité de guidage de lumière (3) correspondant, de préférence, à chaque fois, à l'épaisseur de paroi (a) des parois de séparation associées (31, 32) entre les guides de lumière (3).
  7. Unité d'éclairage selon l'une des revendications 1 à 6, caractérisée par le fait que les guides de lumière (30) sont à chaque fois délimités par deux parois sensiblement verticales (31) et deux parois sensiblement horizontales (32), et les surfaces de découplage de lumière (30a) des guides de lumière (30) délimitées par les parois (31, 32) formant, de préférence, un rectangle ou un carré, au moins les parois de séparation d'ouvertures de diaphragme (51, 52) associées aux parois de séparation verticales et/ou horizontales (31, 32) entre les guides de lumière (30) présentant, de préférence, sur la surface (5a) opposée à l'unité de guidage de lumière (3), une épaisseur de paroi (b) plus petite que les parois de séparation associées (31) de l'unité de guidage de lumière (3).
  8. Unité d'éclairage selon la revendication 7, caractérisée par le fait que toutes les parois de séparation (31, 32) entre les parois de séparation d'ouvertures de diaphragme (51, 52) associées aux guides de lumière (30) présentent, sur les surfaces (5a) opposées à l'unité de guidage de lumière (3), une épaisseur de paroi (b) plus petite que les parois de séparation associées (31, 32) de l'unité de guidage de lumière (3).
  9. Unité d'éclairage selon l'une des revendications 1 à 8, caractérisée par le fait que l'au moins un élément diaphragme (5) est formé d'un métal, par exemple d'une tôle ou d'une feuille métallique ou d'une matière plastique, de préférence une matière plastique résistant à la température.
  10. Unité d'éclairage selon l'une des revendications 1 à 9, caractérisée par le fait que les parois de séparation d'ouvertures de diaphragme (51, 52) sont formées réfléchissant la lumière, en particulier hautement réfléchissantes.
  11. Unité d'éclairage selon l'une des revendications 1 à 10, caractérisée par le fait que les ouvertures de diaphragme (50) dans la matière d'élément diaphragme sont réalisées par découpage, en particulier par découpage de précision ou par découpage laser.
  12. Unité d'éclairage selon l'une des revendications 1 à 11, caractérisée par le fait que les sources de lumière (2) sont des sources de lumière à LED, où chaque source de lumière à LED (2) comprend au moins une diode électroluminescente.
  13. Unité de lumière selon la revendication 12, caractérisée par le fait que chaque source de lumière à LED (2) est apte à être séparément commandée et allumée ou éteinte et/ou régulée, où, de préférence, chaque diode électroluminescente d'une source de lumière à LED est apte à être séparément commandée et allumée ou éteinte et/ou régulée.
  14. Unité d'éclairage selon l'une des revendications 1 à 13, caractérisée par le fait que l'au moins un élément diaphragme (5) est réalisé sous la forme d'un composant plat.
  15. Phare de véhicule automobile comportant au moins une unité d'éclairage selon l'une des revendications 1 à 14.
EP13795987.0A 2012-12-20 2013-10-22 Unité d'éclairage pour un projecteur Active EP2786064B1 (fr)

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ATA50608/2012A AT513738B1 (de) 2012-12-20 2012-12-20 Leuchteinheit für einen Scheinwerfer
PCT/AT2013/050205 WO2014094017A1 (fr) 2012-12-20 2013-10-22 Unité d'éclairage pour un projecteur

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EP (1) EP2786064B1 (fr)
JP (1) JP6061156B2 (fr)
CN (1) CN104105921B (fr)
AT (1) AT513738B1 (fr)
BR (1) BR112014019566A8 (fr)
IN (1) IN2014MN01559A (fr)
MX (1) MX343647B (fr)
WO (1) WO2014094017A1 (fr)

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CN104105921B (zh) 2017-04-05
JP6061156B2 (ja) 2017-01-18
IN2014MN01559A (fr) 2015-05-08
EP2786064A1 (fr) 2014-10-08
BR112014019566A2 (fr) 2017-06-20
JP2015510674A (ja) 2015-04-09
US9157597B2 (en) 2015-10-13
CN104105921A (zh) 2014-10-15
AT513738A1 (de) 2014-07-15
AT513738B1 (de) 2014-07-15
BR112014019566A8 (pt) 2017-07-11
WO2014094017A1 (fr) 2014-06-26
US20150085523A1 (en) 2015-03-26
MX2014008827A (es) 2014-10-24
MX343647B (es) 2016-11-14

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