EP2372235A2 - Lampe de véhicule dotée d'une optique de montage conductrice de lumière - Google Patents

Lampe de véhicule dotée d'une optique de montage conductrice de lumière Download PDF

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Publication number
EP2372235A2
EP2372235A2 EP11159824A EP11159824A EP2372235A2 EP 2372235 A2 EP2372235 A2 EP 2372235A2 EP 11159824 A EP11159824 A EP 11159824A EP 11159824 A EP11159824 A EP 11159824A EP 2372235 A2 EP2372235 A2 EP 2372235A2
Authority
EP
European Patent Office
Prior art keywords
light
vehicle lamp
attachment optics
auskoppelarme
auskoppelarm
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.)
Withdrawn
Application number
EP11159824A
Other languages
German (de)
English (en)
Other versions
EP2372235A3 (fr
Inventor
Matthias Dr. Gebauer
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.)
Marelli Automotive Lighting Reutlingen Germany GmbH
Original Assignee
Automotive Lighting Reutlingen 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 Automotive Lighting Reutlingen GmbH filed Critical Automotive Lighting Reutlingen GmbH
Publication of EP2372235A2 publication Critical patent/EP2372235A2/fr
Publication of EP2372235A3 publication Critical patent/EP2372235A3/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • 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
    • 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
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles

Definitions

  • the present invention relates to a vehicle lamp with at least one optical fiber attachment optics, which is adapted to receive light from at least one light source via at least one light coupling surface in a base volume of the attachment optics and coupled out via a plurality of light outcoupling surfaces, the attachment optics having an area in which the base volume Branched into a plurality of decoupling arms and divided in the light absorbed in the basic volume light evenly on the individual coupling arms.
  • Such a vehicle lamp is from the US 2006/0198158 A1 known.
  • an attachment optics which receives light from a light-emitting diode arrangement serving as a light source and divides it onto a plurality of outcoupling arms. At the respective light exit end of a Auskoppelarms thus appears the decoupling of this light exit end as a bright spot of light.
  • FIG. 4 shows a plan view of the arrangement of the light exit ends of the optical attachment, these light exit ends are arranged symmetrically to a center so that there is a coronal arrangement, which has an n-fold symmetry for n light exit ends.
  • Another, seventh light exit surface extends around said center.
  • This further light exit surface directly limits the base volume and is therefore not connected to the base volume via a coupling-out arm, which would protrude from the base volume.
  • the further light exit surface is then at a lower level than the light exit ends of the Auskoppelarme, namely at the level at which the area of the optical attachment is located in which the basic volume branches into the plurality of coupling-out arms and in which the light received in the basic volume is divided equally between the individual coupling arms.
  • the light transmission amount of the central, further light exit surface can after the US 2006/0198158 be set so that it corresponds to the amount of light that is emitted via each of the peripheral light emission ends.
  • the result is that of the six vertices of a hexagon and a seventh point lying in the center of the hexagon, the light of a light source, divided into these points, should be distributed uniformly, ie in equal parts. be radiated. The points should therefore appear the same bright.
  • the uniformity of the radiation of the peripherally arranged light exit ends is due to the symmetry of the arrangement and thus requires such a symmetrical arrangement.
  • the uniform appearance changes, however, when the viewer is not directly in the main emission direction and instead looks obliquely from a lateral position on the arrangement of the light exit ends.
  • the central light exit surface is increasingly covered by the Auskoppelarme with increasing lateral distance of the observer from the vehicle lamp from the Auskoppelarmen, which affects the appearance.
  • a further disadvantage is that the need for an arrangement of the peripheral light emission ends in an n-fold symmetry narrows the design freedom in the design of the appearance of the vehicle lamp.
  • the object of the present invention is to provide a vehicle lamp which has a luminous area or light exit area with many light spots, which appear even bright in a side view, in which the design latitude for the design of the vehicle lamp is greater than at the well-known vehicle lamp, and has an overall uniform appearance both in the on and in the off state.
  • each light outcoupling surface is optically connected to the base volume via exactly one of several out of the base volume Auskoppelarmen the intent optics and the attachment optics has at least two Auskoppelarme, which merge with different sized light entry cross sections in said area, wherein the size of the light entry cross sections selected is that a light entry cross section, in which a comparatively smaller luminous flux density prevails, has a larger area than a light entrance cross section, in which a comparatively greater luminous flux density prevails, and in that the vehicle lamp has a cover frame, which has a recess for each Auskoppelarm, through which the Auskoppelarm protrudes through.
  • the light coupled into the base volume is divided equally between the individual coupling arms.
  • a uniform brightness of the light spots of a front optics is achieved. Due to the mentioned dimensioning of Light entry cross sections can compensate for differences in the luminous flux densities of the luminous flux entering the respective outfeed arms, which favors the achievement of uniform brightness. Differences in the luminous flux densities occur, for example, in a not completely symmetrical arrangement of the light entry cross sections with respect to the light source.
  • the invention thus provides a greater freedom in the design of the arrangement of the light spots by reduced requirements for the symmetry of the arrangement.
  • the vehicle lamp has a cover, which is a recess for each Auskoppelarm has, through which protrudes the Auskoppelarm through, a flat appearance of the vehicle lamp is generated.
  • the two-dimensional appearance results from the use of the cover frame as well as the fact that each Auskoppelarm must protrude through a recess of the cover through.
  • the cover frame shields the interior of the vehicle lamp from external view and thus already avoids undesirable depth impressions when viewing the vehicle lamp.
  • the fact that all Auskoppelarme protrude through the cover a flat arrangement of the individual light exit surfaces is possible, with the predetermined in the prior art arrangement of light exit surfaces at different levels, ie at different depths of the vehicle lamp, can be avoided.
  • peripheral Auskoppelarme concealed when viewed from the side more centrally arranged decoupling surfaces is the subject of US 2006/0198158 the case.
  • the design latitude is narrowed by the fact that the arrangement of the peripheral light emitting ends and the central light emitting surface at different levels, at least in a side view, always gives some sense of depth, which is not always desirable.
  • a preferred embodiment is characterized in that the light coupling surface is designed so that it increases the convergence of the light passing through them only so far that no significant, caused by a further increase in the convergence loss of coupled luminous flux. This can be achieved in particular by the fact that the Light input surface is flat or concave.
  • the replacement of a plane coupling surface by a convex coupling surface is an example that an increase in the convergence is associated with a loss of coupled luminous flux.
  • a planar coupling surface is considered in comparison to a convex coupling surface, which is identical to the plan coupling surface except for its curvature. Both surfaces thus cover the same areas and in particular have the same edge curves as physical edges.
  • the plane coupling surface can be considered as a projection of the curved convex surface in space in a two-dimensional plane.
  • the plane surface is for example a circle.
  • the curved surface is for example the surface of a spherical cap.
  • the detection angle of the plane surface is greater. This is due to the fact that the legs of the angle in the plane coupling surface touch the physical edges of the coupling surface, while they form tangents to the curved surface in the convex surface. The points of contact of the tangents are located further inward from the physical edge of the convex surface. The residual area remaining for light coupling is thus bounded by the line-forming points of contact of all the tangents bounding the spatial detection angle and is smaller than the area bounded by the physical boundary.
  • the convex surface has a more concentrating effect, this advantage with the disadvantage of the smaller detection angle accompanied.
  • the transition to a convex surface is therefore associated with a loss of light.
  • a slightly convex surface almost the same effects can be achieved as with a plane coupling surface.
  • a loss of coupled-in luminous flux in one embodiment is considered essential if the loss is greater than 1/10 of the luminous flux coupled in otherwise identical conditions via a plane coupling-on surface.
  • the loss of coupled-in luminous flux is considered essential if the loss is greater than 1/20 of the luminous flux coupled in otherwise identical conditions via a plane coupling-in surface. It is furthermore preferred that the loss of coupled-in luminous flux is considered essential if the loss is greater than 1/100 of the luminous flux coupled in otherwise identical conditions via a plane coupling-in surface.
  • a surface is used as the light entry surface, which collimates an incident bundle of divergent light of the light source so strongly that the light coupled into the light guide propagates there as a bundle of parallel rays.
  • Light entry surface of a light-conductive attachment optics is usually that such over the entry surfaces parallelization is associated with a loss of light. This means that the parallelism is paid for, that less light is coupled in than would be possible at maximum. The loss of light occurring during coupling affects a suboptimal lower brightness of the spots, or a suboptimal smaller number of spots.
  • Fresnel lenses have the disadvantage that they require a complex accurate positioning of the light source relative to the coupling surface.
  • the mentioned embodiment avoids the disadvantages of a suboptimal lower brightness of the spots or a suboptimal smaller number of spots by allowing more light to enter the guide. As a result, with a given number of light spots, a higher brightness of the light spots or with a given brightness a larger number of light spots in the light exit area of the vehicle light can be achieved. If one defines the efficiency of the vehicle lamp as the ratio of the luminous flux exiting via the light spots to the luminous flux injected via the light coupling surface, a desired high efficiency of the vehicle lamp results from this embodiment.
  • An advantageous embodiment is characterized in that it has a plurality of identical or different attachment optics.
  • This embodiment allows a modular design of a luminous surface with different arrangements of light spots with a few basic modules, which allows a rational production and spare parts inventory.
  • Lighting devices for vehicles can be after Their function is divided into headlamps and luminaires. Headlamps are used to illuminate the vehicle environment, while lights fulfill signal functions intended to alert other road users to the vehicle. Examples of lights are flashing lights, brake lights and daytime running lights, and this list should not be construed as exhaustive.
  • FIG. 1 An embodiment of a vehicle lamp 10 according to the invention.
  • the in the FIG. 1 indicated directions H, V, HV refer to a position of a vehicle lamp 10 in the installed state in the vehicle.
  • the direction H represents a horizontal
  • the direction V a vertical
  • the direction HV the direction of travel.
  • the vehicle lamp 10 has a housing 12, which is covered by a transparent cover 14. Due to their orientation to the direction of travel HV is in the illustrated vehicle lamp 10 is a tail light, of which the FIG. 1 showing a right end in a horizontal section. So you look from the top of the cut vehicle lamp 10 into it.
  • the invention is not limited to tail lights and in the same way for bow lights such as daytime running lights and arranged in the bow flashing lights and other lights used, regardless of whether such lights have a separate housing or are arranged together with other light functions fulfilling light modules in a headlight ,
  • the in the FIG. 1 illustrated vehicle lamp 10 has a light source 16 and a light guide attachment optics 18.
  • the optical fiber attachment optics 18 has a light input surface 22 facing the light source 16 and a plurality of light output surfaces 24, 26 which optically communicate with the base via output arms 28, 30 and a base volume Light input surface 22 are connected.
  • an optical connection means any connection via which light from the light source 16, which is coupled via the light coupling surface 22 into the optical attachment 18, reaches the light outcoupling surfaces 24, 26.
  • the basic volume of the attachment optics is the partial volume of the attachment optics 18 lying between the light incoupling surface 22 and the decoupling arms 28, 30.
  • the decoupling arms 28, 30 project through corresponding recesses in the cover frame 20 through the cover frame 20.
  • the cover frame 20 has the function of a design element for influencing the appearance of the vehicle lamp 10.
  • the cover 20 is opaque and thus covers the inside of the housing 12 lying elements and structures against insights from the outside.
  • the cover frame 20 may have a planar shape, which is arranged parallel or inclined to the light incidence surface 22 oriented in the vehicle lamp 10.
  • the planar form of the cover has a curved shape in space. It may be a convex or concave or alternately convex and concave curved shape. The curvature can vary depending on the spatial direction. It is essential that the cover frame for each Auskoppelarm has a recess through which the Auskoppelarm protrudes through.
  • the light outcoupling surfaces of the coupling arms can protrude beyond the surface of the cover frame or flush with the surface of the cover frame.
  • the viewer takes the light outcoupling surfaces 24, 26 as bright luminous spots.
  • the attachment optics 18 has a in the FIG. 1 Dashed area shown 32, in which via the light incidence surface 22 coupled light evenly distributed to the individual coupling arms 28, 30. It should be noted that in subregions of the region 32 in which the two outer and thus peripheral decoupling arms 28 pass into the region 32 or open, a lower luminous flux density will prevail than in the centrally arranged Auskoppelarm 30. This results from the geometry the arrangement.
  • the uniform distribution of the injected light onto the individual coupling arms 28, 30 is such that the size of the respective light entry cross sections is chosen such that a light entry cross section 33 of a coupling arm 28, in which a smaller luminous flux density prevails, has a larger area than a light inlet cross section 35 another Auskoppelarms 30 in which a comparatively larger luminous flux density prevails.
  • the light entry cross section 33, 35 results in each case as a surface of a section through the respective Auskoppelarm 28, 30 in the height of the region 32nd
  • the surface is in each case inversely proportional to the luminous flux density, so that the values of the luminous fluxes resulting from the product of area and luminous flux density for each coupling-out arm 28, 30 are equal.
  • the attachment optics has at least two decoupling arms 28, 30, which merge into said areas 32 with different light entry cross sections.
  • the light source 16 is in one embodiment a semiconductor light source 34 of one or more Light-emitting diodes which are mounted on a chip 36 and equipped with a heat sink for dissipating the electrical power loss.
  • ⁇ is an angle whose apex is seated on the luminous surface of the light emitting diode and whose reference leg is formed by a straight line perpendicular to the luminous LED surface. In the FIG. 1 such a straight line would extend antiparallel to the direction HV.
  • the luminous flux decreases with increasing angle ⁇ , which is one reason why the luminous flux density in the center of the region 32 and thus in the region of the centrally arranged decoupling arm 32 is maximal and decreases towards the edges. Therefore, the luminous flux density in the light entry surfaces of the peripherally arranged decoupling arms 28 is less than in the light entry surface of the centrally arranged Auskoppelarms.
  • Semiconductor light sources are also preferred as light sources 16 because they emit cold light.
  • the electrical power loss occurring during operation of the light-emitting diodes is produced in the light-emitting diodes and can be dissipated separately from the radiation via heat sinks. The heat loss is therefore not radiated as heat radiation in the light emission direction, as would be the case with incandescent lamps. Therefore, LEDs can be arranged very close to the light input surface 22, for example, with a distance of 1/10 to 3/10 millimeters. This low Distance favors considerably the efficiency of the vehicle lamp 10, because it allows a largely complete coupling of the emitted light from the light source 16 in the front of her half-light radiation in the optical attachment 18.
  • the light incoupling surface 22 is preferably designed such that it increases the convergence of the light passing through it only to such an extent that no substantial loss of injected luminous flux due to a further increase in the convergence occurs yet. This is the case, for example, for an ideal plane light coupling surface 22.
  • This example shows how a parallelization of the light passing through the light incoupling surface 22 takes place at the expense of the effective light incoupling surface and thus at the expense of the portion of the coupled-in light in the total radiation of the light source 16.
  • the efficiency of the light coupling is optimized and for a not complete parallelization at the light incidence surface 22 is accepted.
  • a similar efficient coupling as with an ideal-plan surface can also be with a achieve concave light-emitting surface 22.
  • FIG. 2 shows an embodiment of a built-vehicle lamp 10, as it results for a behind-the-vehicle observer in the event that the vehicle lamp 10 is a taillight.
  • the vehicle lamp 10 has three attachment optics modules 18.1, 18.2 and 18.3, of which the first attachment optics module 18.1 are square and the two other attachment optics modules 18.2 and 18.3 are configured diamond-shaped.
  • the in the FIG. 2 illustrated vehicle lamp 10 thus provides an example of a plurality of attachment optics modules 18.1, 18.2, 18.3 Instead of two different optical attachment modules, it is also possible to use a plurality of identical attachment optical modules or more than two different attachment optical modules. This makes it possible to produce different forms of light exit surfaces with a limited number of different optical attachment modules.
  • each attachment optical module 18.1, 18.2, 18.3 three times three light output surfaces, each with a central light output surface 26 and 8 peripheral light output surfaces 24. It is understood that the number and the arrangement of decoupling surfaces of an optical attachment module can deviate from the illustrated examples and that for a vehicle lamp 10, more or less than three attachment optics modules 18.1, 18.2, 18.3 can be used.
  • Decoupling surfaces 24, 26 associated Auskoppelarmen 28, 30 ensures, even if the luminous flux densities are different due to the geometry of the arrangement of the light entry surfaces of the coupling arms 28, 30 and / or the directional radiation characteristic of the light sources used.
  • a uniform brightness of the individual light outcoupling surfaces 24, 26 is achieved, which appear when illuminated light sources as bright luminous spots.
  • FIG. 3 shows an embodiment of a front optics 18 together with a semiconductor light source 34 as a light source 16 and with some light rays.
  • the attachment optics 18 is again shown in a horizontal section, that is, in a plane lying in the plane of the directions H and HV section and has a centrally disposed Auskoppelarm 30 and peripherally arranged Auskoppelarme 28.
  • the light emanating from the light source 16 and coupled via the light entry surface 22 in the optical attachment 18 light spreads there first divergent and is divided evenly and completely in the plane 32 on the decoupling arms 28 and 30.
  • the uniformity is achieved by the already described dimensioning of the respective light entry surfaces, thus preferably by a reverse proportionality between area and luminous flux density in the area.
  • a desirable parallelization of the in the peripheral Auskoppelarmen 28 propagating light takes place by an internal total reflection on side surfaces 38, 40 of this Auskoppelarme 28 instead.
  • side surfaces 38 of the peripherally arranged Auskoppelarme 28 are adapted to reflect them directly or reflected incident light preferably in the direction of an optical axis 42 of this Auskoppelarms 28.
  • the light beams 44 and 48 in this sense directly represent incident light. The directly incident light undergoes no further reflections between the coupling via the light incoupling surface 22 and the reflection on the outer surface 38.
  • the light beam 46 represents light, which is initially reflected on a central surface of the Auskoppelarm 30 facing side surface 40 of a peripherally arranged Auskoppelarms 28 and thereby deflected to the outside.
  • Both the outer side surfaces 38 and the inner side surfaces 40 of the peripherally arranged Auskoppelarme 28 are adapted by their shape, which is according to the law of reflection for the direction of the reflected light, to effect the desired parallelization.
  • these surfaces are calculated in a preferred embodiment as free-form surfaces that are calculated pointwise or area by segment so that they cause the desired parallelization.
  • it may also be simpler geometric basic shapes such as tilted and flat surfaces relative to the optical axis 42, parabolic curved surfaces, or similar reflection surfaces effecting a parallelization.
  • any reflection is understood to be parallelizing, in which an angle which forms the light beam with the optical axis 42, after the Reflection is smaller than before the reflection.
  • the design of the inner side surfaces 40 is preferably carried out so that the parallelization only after a further reflection on an outer side surface 38 occurs.
  • the light output surfaces 24 of the peripheral Auskoppelarme 28 in other embodiments have a deviating from the planar shape shown form which exerts a parallelizing effect on the light passing through this decoupling surface 24 light.
  • the shape may here, depending on the beam path within the respective Auskoppelarms 28, convex or concave curved, have tilted portions, or be tilted as a whole.
  • FIG. 4 shows a side view of a lens attachment 18 with respect to a respective optical axis 42 tilted, flat, outer side surfaces 38. Since it is in the representation of the FIG. 4 is not a sectional view, all three visible Auskoppelarme 28 peripherally arranged Auskoppelarme. By projections 52 on the visible Auskoppelarmen 28 is in the FIG. 4 shown attachment optics 18 adapted to be connected to a holding device, which also serves as a holding device of the light source 16 and thus defines an arrangement of the light source with respect to their attachment optics.
  • FIG. 5 shows such a holding device 54.
  • the holding device 54 has a the peripheral optics 18 enveloping lateral surface with a decoupling surfaces 24, 26 facing the first end 58 and a light source 16 facing the second end 60.
  • the first end 58 is designed to hold the attachment optics.
  • the device takes place, for example, in that the first end 58 has receptacles into which the projections 52 of the attachment optics 18 are inserted in a force-fitting and / or form-fitting manner.
  • the second end 60 of the holding device 54 is configured to hold the light source 16 or a structure holding the light source 16.
  • the device takes place, for example, in that the holding device 54 is connected to a circuit board 62 of a semiconductor light source 34.
  • the connection is made by a clip connection, by casting, by welding, by gluing, by soldering, and so on.
  • connection is configured so that the semiconductor light source 34, or more generally the light source 16, relative to the attachment optics 18, in particular to the light coupling surface 22, has a defined position.
  • FIG. 6 shows an embodiment with an alternative holding device 64 which is adapted to be attached to one end of the attachment optics 18, on which also the light input surface 22 of the optical attachment 18 is located and which is also adapted to a light source 16 holding structure For example, a board 62 of a semiconductor light source 34 to be attached.
  • FIG. 7 shows a view of the light exit side of an optical attachment module 18 with nine Auskoppelarmen and approximately circular cross-section of the light outcoupling surfaces 24 and 26th
  • FIG. 8 shows a perspective view of another variant of an optical attachment 18 with sixteen arms and rectangular cross-section of the light outcoupling surfaces.
  • the number of Auskoppelarme is variably framed.
  • the arrangement of the decoupling surfaces can also be designed variably and can be symmetrical, quadrangular, rectangular, radial, etc ..
  • the decoupling surfaces can also, as in the FIG. 9 is shown to be arranged on radially diverging lines or other lines. Ultimately, it depends only on how, or which area is to be homogeneously illuminated with many spots of light.
  • the shape of the light spots is determined by the shape of the light outcoupling surfaces 24, 26.
  • This shape is not limited to the illustrated circular shape and may be, for example, polygonal, star-shaped, elliptical, semicircular, etc. In principle, there are no restrictions on this form.
  • a scattering disk or the like for generating the light distribution can be arranged above the attachment optics 18.
  • elements with smaller radii, free-form surfaces or facets, for example, in pillow form, may be applied to the coupling-out surfaces 24, 26 of the attachment optics 18 in addition to their planar or curved or tilted basic shape in order to generate the light distribution directly from the coupling-out arms 28, 30. This saves you the Fresnel losses of an additional disc and thus gains in efficiency.
  • the vehicle lamp has a transparent lens arranged in the light emission direction in front of the attachment optics.
  • the lens has, depending on the design, scattering structures such as prisms and / or cushions and / or edges and / or lines or is realized without such structures.
  • the lens is identical to the cover 14 or a region of the cover 14 or realized as a separate lens which lies between the attachment optics and the cover 14.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Optical Couplings Of Light Guides (AREA)
EP11159824A 2010-03-27 2011-03-25 Lampe de véhicule dotée d'une optique de montage conductrice de lumière Withdrawn EP2372235A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010013045A DE102010013045A1 (de) 2010-03-27 2010-03-27 Fahrzeugleuchte mit einer Lichtleiter-Vorsatzoptik

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EP2372235A2 true EP2372235A2 (fr) 2011-10-05
EP2372235A3 EP2372235A3 (fr) 2012-09-12

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTV20120175A1 (it) * 2012-09-12 2014-03-13 Automotive Lighting Italia Spa Fanale automobilistico
EP2743565A1 (fr) * 2012-12-17 2014-06-18 Odelo GmbH Dispositif d'éclairage avec un élément conducteur de lumière en forme de doigt et un réflecteur comportant deux facettes
FR3135128A1 (fr) * 2022-04-29 2023-11-03 Valeo Vision Module lumineux multiplicateur

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013210257A1 (de) * 2013-06-03 2014-12-18 Automotive Lighting Reutlingen Gmbh Vorsatzoptik für eine Lichtquelle
DE102013221332B4 (de) 2013-10-21 2023-10-19 HELLA GmbH & Co. KGaA Beleuchtungsvorrichtung
DE102020003014B4 (de) 2020-05-19 2023-11-23 Mercedes-Benz Group AG Beleuchtungseinrichtung für ein Fahrzeug

Citations (2)

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Publication number Priority date Publication date Assignee Title
US20060198158A1 (en) 2005-03-04 2006-09-07 Daisuke Nagabuchi Light guiding unit, light guiding unit assembly, and lamp comprising the same
US7419287B2 (en) 2005-07-21 2008-09-02 Valeo Vision Lighting or indicator device, in particular for motor vehicles

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JP2000318396A (ja) * 1999-05-17 2000-11-21 Otani National Denki Kk 光飾装置
JP2004047351A (ja) * 2002-07-15 2004-02-12 Koito Mfg Co Ltd 車両用灯具

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060198158A1 (en) 2005-03-04 2006-09-07 Daisuke Nagabuchi Light guiding unit, light guiding unit assembly, and lamp comprising the same
US7419287B2 (en) 2005-07-21 2008-09-02 Valeo Vision Lighting or indicator device, in particular for motor vehicles

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTV20120175A1 (it) * 2012-09-12 2014-03-13 Automotive Lighting Italia Spa Fanale automobilistico
EP2743565A1 (fr) * 2012-12-17 2014-06-18 Odelo GmbH Dispositif d'éclairage avec un élément conducteur de lumière en forme de doigt et un réflecteur comportant deux facettes
FR3135128A1 (fr) * 2022-04-29 2023-11-03 Valeo Vision Module lumineux multiplicateur

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DE102010013045A1 (de) 2011-09-29
EP2372235A3 (fr) 2012-09-12

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