WO2021121739A1 - Réflecteur et projecteur d'un véhicule, comprenant ledit réflecteur - Google Patents

Réflecteur et projecteur d'un véhicule, comprenant ledit réflecteur Download PDF

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Publication number
WO2021121739A1
WO2021121739A1 PCT/EP2020/079858 EP2020079858W WO2021121739A1 WO 2021121739 A1 WO2021121739 A1 WO 2021121739A1 EP 2020079858 W EP2020079858 W EP 2020079858W WO 2021121739 A1 WO2021121739 A1 WO 2021121739A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
light guide
guide piece
reflector
wings
Prior art date
Application number
PCT/EP2020/079858
Other languages
German (de)
English (en)
Inventor
Thomas Gross
Original Assignee
Daimler Ag
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 Daimler Ag filed Critical Daimler Ag
Publication of WO2021121739A1 publication Critical patent/WO2021121739A1/fr

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
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/239—Light guides characterised by the shape of the light guide plate-shaped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/237—Light guides characterised by the shape of the light guide rod-shaped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/241—Light guides characterised by the shape of the light guide of complex shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/242—Light guides characterised by the emission area
    • F21S43/245—Light guides characterised by the emission area emitting light from one or more of its major surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/251—Light guides the light guides being used to transmit light from remote light sources

Definitions

  • the invention relates to a reflector for a headlight of a vehicle and a headlight, in particular a rear light, of a vehicle with such a reflector.
  • a headlight of a vehicle comprises, as standard, a lamp and a reflector which is provided for bundling light from the lamp.
  • the reflector is usually parabolic in shape and coated with aluminum on its bundling surface.
  • Such a headlight is known, for example, from DE 2748 981 A1.
  • the reflector is then arranged behind the lamp and is visible in the headlight. Since the shape, the arrangement in the headlight and the design of the reflector are predetermined by its function, it is extremely difficult to adapt the design of the headlight.
  • a generic reflector which has an elongated light guide piece and two wings.
  • the light is coupled into the reflector at one longitudinal end of the light guide piece and introduced into the two wings.
  • the light is decoupled from the reflector on the wings, for which purpose a decoupling structure is formed on the wings.
  • EP 2 543 540 A1 also discloses a light guide with a decoupling structure.
  • the object of the invention is therefore to provide an improved or at least alternative embodiment for a reflector of the generic type in which the disadvantages described are overcome.
  • a design adaptation of the headlight should be made possible.
  • the object of the invention is also to provide a corresponding headlight with the reflector. According to the invention, these objects are achieved by the subject matter of the independent claims. Advantageous embodiments are the subject of the dependent claims.
  • a reflector according to the invention is provided for a headlight of a vehicle, in particular for a rear light of a vehicle.
  • the reflector comprises at least one plate-like body made of a light-conducting material, the light-conducting material preferably being a light-conducting plastic and in particular polymethyl methacrylate (acrylic glass).
  • the plate-like body has an elongated light guide piece and two wings or is formed from these. The two wings adjoin the light guide piece integrally on both sides in a respective transition area. The body is thereby formed in one piece or in one piece.
  • the light guide piece has a light connection for coupling in light at one of its longitudinal ends.
  • the two wings and the piece of light guide are connected to one another in a light-conducting manner in the respective transition areas via a light coupler in each case.
  • light coupled into the light guide piece can be coupled into the wings via the respective light couplers and then coupled out of the wings.
  • the light guide piece of the body is elongated so that a longitudinal axis is defined in the light guide piece.
  • the wings connect to the light guide piece on both sides or, to put it another way, the light guide piece is arranged between the two wings.
  • the respective transition area then extends along the longitudinal axis of the light guide piece between the respective wing and the light guide piece.
  • the respective light coupler is arranged or designed in the respective transition area and is designed to couple light out of the light guide piece and to couple this decoupled light into the respective wing.
  • the term “plate-like” means that one dimension of the body is several times smaller than the other two dimensions of the body.
  • the plate-like body thus has two large surfaces opposite one another, which are then aligned parallel to the longitudinal axis of the light guide piece.
  • the two major surfaces of the body are partially formed by the two wings, so that the size of the body can also be adjusted depending on the size of the two wings.
  • One large area of the body forms a visible side on which the light coupled into the body emerges.
  • the visible side of the body is expediently arranged in the headlight, facing the viewer or outwards.
  • the other large area of the body forms a rear side, on which the light coupled into the body can exit or be deflected towards the visible side.
  • the rear side of the body is then appropriately arranged in the headlight, facing away from the viewer or from the outside.
  • the back of the body can additionally be covered with a light-permeable or partially light-permeable or light-proof layer of paint. This color layer is freely adaptable and can be monochrome or multicolored.
  • a conventional reflector vapor-coated with aluminum can be replaced, which advantageously enables the design of the headlamp to be adapted over a wide range.
  • the shape and size of the body of the reflector can be adapted over a wide range without the function of the reflector and also of the headlight being adversely affected.
  • different and, among other things, colored designs of the body of the reflector are possible, which is almost impossible with the conventional reflector.
  • the light in the reflector according to the invention can be coupled directly into the body, which can also reduce the space requirement for the reflector.
  • the respective light coupler has an elongated depression with two flanks.
  • the two flanks are aligned parallel to the longitudinal axis of the light guide piece.
  • the respective flanks can - viewed transversely to the longitudinal axis of the light guide section - be arranged parallel to one another or also at an angle.
  • the recess can also have a connecting flank which then connects the two flanks to one another.
  • One flank is assigned to the light guide piece and the other flank is assigned to the respective wing.
  • a flank coupling-out structure made up of a plurality of grooves is then formed on the flank of the light guide piece. The multiple grooves are aligned parallel to one another and transversely to the longitudinal axis of the light guide piece.
  • the shape and size of the multiple grooves are aimed at optimally coupling light out of the light guide piece and optimally coupling it in Optimized light in the respective wing.
  • the plurality of grooves can be designed in such a way that the light coupled into the light guide piece is refracted at the grooves and is coupled out on the flank of the light guide piece close to it perpendicular to the latter.
  • the decoupled light can then hit the flank of the respective wing close to perpendicular and thus couple it into the respective wing with little loss.
  • the light can therefore be decoupled from the light guide piece on the flank of the light guide piece and coupled into this on the flank of the respective wing.
  • a uniform distribution of light in the entire body can be achieved with simple means.
  • a light decoupler is formed on a rear side of the body.
  • the light decoupler Through the light decoupler, the light can be decoupled from the body and exit the body on a viewing side opposite the rear side.
  • the rear side and the visible side are, as already explained above, formed by the large areas of the plate-like body.
  • the visible side of the body is expediently facing the viewer and the rear side of the body is appropriately arranged facing away from the viewer in the headlight.
  • the light is reflected on the rear side by the light decoupler and deflected towards the visible side. As a result, almost no light emerges on the rear side and almost all of the light coupled into the body emerges on the visible side.
  • the light decoupler can include a wing decoupling structure which is formed on the two wings.
  • the wing decoupling structure is then formed by a plurality of elongated grooves which are aligned parallel to one another and parallel to the longitudinal axis of the light guide piece.
  • the light coupled into the respective wing can be reflected towards the visible side at the elongated grooves and exit on the visible side.
  • the shape and size of the multiple elongated grooves are optimized for optimum coupling of light out of the respective wing.
  • the plurality of elongated grooves can be designed in such a way that the light coupled into the wing is reflected at the elongated grooves close to perpendicular to the visible side.
  • the light decoupler comprises a light conductor piece decoupling structure.
  • the light guide piece decoupling structure is formed on the light guide piece by a plurality of short grooves.
  • the short grooves are aligned parallel to one another and transversely to the longitudinal axis of the light guide piece.
  • the short grooves on the light piece can be arranged in a single row or in multiple rows.
  • the light guide section decoupling structure is provided for decoupling light from the light guide section.
  • the shape and size of the several short grooves are optimized for optimal coupling of light out of the light piece.
  • the plurality of short grooves can be designed in such a way that the light coupled into the light guide piece is reflected at the short grooves close to perpendicular to the visible side. The reflected light can then impinge on the visible side of the body almost perpendicularly and thus couple it out of the light guide piece with little loss.
  • the light couplers and the light decoupler can advantageously be provided in the body of the reflector.
  • the light is coupled into the light guide piece and thus into the body via the light connection. From the light connection, the coupled light is guided in the light guide piece along its longitudinal axis and coupled into the two wings via the light coupler. This means that the light is evenly distributed throughout the body.
  • the light is decoupled from the body through the light decoupler on the back of the body and exits on the visible side of the body.
  • the light is decoupled from the wings by the wing decoupling structure and from the light guide section by the light guide section decoupling structure.
  • the body of the reflector is bent along the longitudinal axis of the light guide piece and / or transversely to the longitudinal axis of the light guide piece.
  • a visible side of the body provided for the exit of the light is bent inward and a rear side of the body opposite the visible side is bent outward.
  • the rear side and the visible side of the body are formed by its large areas.
  • the light guide piece is formed by a tubular light guide.
  • the wings then connect integrally to this light guide on both sides and the light connection comprises a single one Connection point for the light guide.
  • the light guide piece is formed from two tubular light guides.
  • the two light guides then join one another integrally at the sides.
  • the two light guides are connected to one another to form the light guide piece in such a way that their longitudinal axes are aligned parallel to one another and to the longitudinal axis of the light guide piece.
  • the wings then each laterally connect integrally to one of the light guides and the light connection each comprises a connection point for the respective light guide.
  • the reflector comprises a light board with at least one light.
  • the body and the light circuit board are connected to one another in such a way that the light connection of the body is connected in a light-conducting manner to the at least one light on the light circuit board.
  • the light guide piece as described above, has at least one light guide
  • the light board can have a light for each of the light guides of the light guide piece.
  • the respective luminaire is then connected in a light-conducting manner to the respective light guide at the respective connection point.
  • the reflector has a plurality of bodies which are configured identical to one another or different from one another. If the reflector has a light circuit board, the respective bodies on the light circuit board are arranged next to one another and connected to the lights on the light circuit board in a light-conducting manner.
  • the invention also relates to a headlight of a vehicle, in particular a rear light of a vehicle.
  • the headlight has a reflector described above. In order to avoid repetition, reference is made at this point to the statements above.
  • Fig. 1 is a view of a reflector according to the invention in a first
  • Fig. 2 is a view of the reflector in the first embodiment of a
  • Fig. 3 is a sectional view of the reflector in the first embodiment on a plane A-A shown in Fig. 1;
  • Fig. 4 is a sectional view of the reflector in the first embodiment in a plane B-B shown in Fig. 1;
  • Fig. 5 is a view of the reflector according to the invention in a second
  • Fig. 6 is a sectional view of the reflector in the second embodiment in a plane C-C shown in Fig. 5;
  • Fig. 7 is a sectional view of the reflector in the second embodiment in a plane D-D shown in Fig. 5;
  • FIG. 8 shows a view of the reflector according to the invention in a third
  • Fig. 9 is a sectional view of the reflector in the third embodiment in a plane E-E shown in Fig. 8;
  • FIG. 10 is a sectional view of the reflector in the third embodiment in a plane F-F shown in FIG. 8.
  • FIG. 1 shows a view of a reflector 1 according to the invention in a first embodiment from a visible side 2a.
  • Fig. 2 shows a view of this reflector 1 from a rear side 2b.
  • FIG. 3 shows a sectional view of this reflector 1 in a plane AA shown in FIG. 1 and
  • FIG. 4 shows a sectional view of this reflector 1 in a plane BB shown in FIG.
  • the reflector 1 comprises a plate-like body 3, the opposite large surfaces of which each form the visible side 2a and the rear side 2b.
  • the body 3 is formed from a light-conducting material, preferably from light-conducting plastic, more preferably from polymethyl methacrylate (acrylic glass).
  • the body 3 has an elongated light guide piece 4 with a longitudinal axis 5 and two wings 6a and 6b. As can be seen in particular in FIG. 4, the body 3 is slightly bent along the longitudinal axis 5 of the light guide piece 4. The visible side 2a of the body 3 is bent inwards and the rear side 2b of the body 3 is bent outwards.
  • the light guide piece 4 is formed here from two tubular light guides 7a and 7b, which laterally connect integrally to one another. The two wings 6a and 6b then adjoin the respective light guides 7a and 7b in transition areas 8a and 8b integrally at the sides.
  • the body 3 is consequently formed in one piece or in one piece.
  • the reflector 1 further comprises a lamp board 9 with two lamps 9a and 9b.
  • the body 3 and the lamp board 9 are connected to one another in a light-conducting manner.
  • the body 3 is shown at a distance from the lighting circuit board 9 only for the sake of clarity.
  • the respective light 9a or 9b is then connected to the respective light guide 7a or 7b in a light-conducting manner at the respective connection point 10a or 10b.
  • light is coupled into the light guides 7a and 7b and thus into the body 3 via the lights 9a and 9b.
  • Light couplers 11a and 11b are formed in the respective transition areas 8a and 8b, which couple the light coupled into the light guides 7a and 7b from the light guides 7a and 7b into the respective wings 6a and 6b. As a result, the light coupled in at the light connection 10 is evenly distributed over the entire body 3.
  • the respective light coupler 11a or 11b has an elongated recess 12a or 12b.
  • the respective recess 12a or 12b is parallel to the longitudinal axis 5 and has two flanks 13a or 13b and 14a or 14b that are parallel to one another here.
  • One flank 13a or 13b is assigned to the light guide piece 4 and thus to the respective light guide 7a or 7b, and the other flank 14a or 14b is assigned to the respective wing 6a or 6b.
  • a flank decoupling structure 15a or 15b is formed from a plurality of grooves which are aligned parallel to one another and transversely to the longitudinal axis 5. Referring to FIGS.
  • a light decoupler 16 is also formed on the rear side 2b of the body 3.
  • the light decoupler 16 comprises a wing decoupling structure 17 which is formed on the two wings 6a and 6b.
  • the wing decoupling structure 17 is through formed a plurality of elongated grooves which are aligned parallel to one another and parallel to the longitudinal axis 5.
  • the light decoupler 16 also comprises a light guide piece decoupling structure 18 which is formed by a plurality of short grooves.
  • the short grooves are aligned parallel to one another and transversely to the longitudinal axis 5.
  • the short grooves are also arranged in two rows on the light guide piece 4, the respective row being assigned to the respective light guide 7a or 7b.
  • the light at the light connection 10 or at the connection points 10a and 10b is coupled into the light guide piece 4 or into the two light guides 7a and 7b and thus into the body 3.
  • the coupled-in light is guided along the longitudinal axis 5 from the light connection 10 or from the connection points 10a and 10b in the light guide piece 4 or in the light guides 7a and 7b.
  • the light from the light guide piece 4 or from the light guides 7a and 7b is coupled into the two wings 6a and 6b by the light couplers 11a and 11b.
  • the light reflects on the grooves of the flank decoupling structure 15a or 15b of the flank 13a or 13b and strikes the opposite flank 14a or 14b close to perpendicular.
  • the light from the light guide piece 4 or from the two light guides 7a and 7b is coupled into the two wings 6a and 6b and distributed evenly in the body 3.
  • the light is now decoupled from the body 3 by the light decoupler 16 on the rear side 2b.
  • the light reflects on the long grooves of the wing decoupling structure 17 and on the short grooves of the light guide piece decoupling structure 18 towards the visible side 2a and emerges from the body 3 on this.
  • the light decoupler 16 on the rear side 2b the light from the body 3 strikes almost completely on the visible side 2a.
  • the possible reflection of light in the body 3 is indicated in FIG. 3 with arrows.
  • FIG. 5 shows a view of the reflector 1 according to the invention in a second embodiment from the visible side 2a.
  • FIG. 6 shows a sectional view of this reflector 1 in a plane CC shown in FIG. 5.
  • FIG. 7 shows a sectional view of this reflector 1 in a plane DD shown in FIG. 5.
  • the reflector 1 has two identical bodies 3 here.
  • the light guide pieces 4 of these two bodies 3 each have only a single light guide 7c.
  • the light guide 7c is then connected in a light-conducting manner to the light 9c of the light board 9 at the connection point 10c of the light connection 10.
  • the respective light couplers 11a and 11b are also designed differently in the respective transition regions 8a and 8b.
  • the body 3 is slightly bent along the longitudinal axis 5 and transversely to the longitudinal axis 5.
  • the visible side 2a is bent inwards and the rear side 2b is bent outwards. Otherwise, the reflectors 1 in the first and second embodiments are the same.
  • FIG. 8 shows a view of the reflector 1 according to the invention in a third embodiment from the visible side 2a.
  • FIG. 9 shows a sectional view of this reflector 1 in a plane E-E shown in FIG. 8.
  • FIG. 10 shows a sectional view of this reflector 1 in a plane F-F shown in FIG.
  • the light couplers 11a and 11b are designed here as in the first embodiment of the reflector 1. Otherwise, the reflectors 1 in the second and third embodiment are the same.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

L'invention concerne un réflecteur (1) pour un projecteur d'un véhicule. Le réflecteur (1) comprend au moins un corps de type panneau (3) constitué d'un matériau conducteur de lumière. Le corps (3) comprend une pièce de guidage de lumière (4) allongée et deux ailes (6a, 6b), qui sont adjacentes d'un seul tenant à la pièce de guidage de lumière (4) des deux côtés de celle-ci dans des zones de transition respectives (8a, 8b). La pièce de guidage de lumière (4) comporte, à l'une de ses extrémités longitudinales, un raccord de lumière (10) pour l'injection de lumière. Les deux ailes (6a, 6b) et la pièce de guidage de lumière (4) sont reliées ensemble dans les zones de transition respectives (8a, 8b) de manière à conduire la lumière par l'intermédiaire de coupleurs optiques respectifs (11a, 11b). Ainsi, la lumière injectée dans la pièce de guidage de lumière (4) peut être injectée dans les ailes (6a, 6b) au moyen des coupleurs optiques (11a, 11b) puis extraite des ailes (6a, 6b). L'invention concerne également un projecteur, en particulier un feu arrière, d'un véhicule, comprenant ledit réflecteur (1).
PCT/EP2020/079858 2019-12-19 2020-10-23 Réflecteur et projecteur d'un véhicule, comprenant ledit réflecteur WO2021121739A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019008837.9A DE102019008837A1 (de) 2019-12-19 2019-12-19 Reflektor und ein Scheinwerfer eines Fahrzeugs mit dem Reflektor
DE102019008837.9 2019-12-19

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Publication Number Publication Date
WO2021121739A1 true WO2021121739A1 (fr) 2021-06-24

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WO (1) WO2021121739A1 (fr)

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DE102021120001A1 (de) 2021-08-02 2023-02-02 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Flächenlichtleiter für eine Leuchte eines Kraftfahrzeugs und Leuchte für ein Kraftfahrzeug

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JP2016178059A (ja) 2015-03-23 2016-10-06 トヨタ自動車東日本株式会社 車両用灯具
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