EP3176494B1 - Module d'éclairage ayant deux guides de lumière - Google Patents

Module d'éclairage ayant deux guides de lumière Download PDF

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Publication number
EP3176494B1
EP3176494B1 EP16200635.7A EP16200635A EP3176494B1 EP 3176494 B1 EP3176494 B1 EP 3176494B1 EP 16200635 A EP16200635 A EP 16200635A EP 3176494 B1 EP3176494 B1 EP 3176494B1
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EP
European Patent Office
Prior art keywords
light
light guide
per
module
guide
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
EP16200635.7A
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German (de)
English (en)
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EP3176494A1 (fr
Inventor
Thomas Kleiner
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.)
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Publication date
Application filed by Automotive Lighting Reutlingen GmbH filed Critical Automotive Lighting Reutlingen GmbH
Publication of EP3176494A1 publication Critical patent/EP3176494A1/fr
Application granted granted Critical
Publication of EP3176494B1 publication Critical patent/EP3176494B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F21S43/50—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers
    • 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
    • F21S43/239—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
    • F21S43/20—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
    • F21S43/243—Light guides characterised by the emission area emitting light from one or more of its extremities
    • 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
    • F21S43/247—Light guides with a single light source being coupled into 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
    • F21S43/20—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
    • F21S43/249—Light guides with two or more light sources being coupled into 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
    • F21S43/20—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 present invention relates to a lamp module for a motor vehicle lighting device according to the preamble of claim 1.
  • a light module is from EP 2 527 722 A2 known and has, among other things, an elongate first light guide, which has a light exit surface extending along the elongate first light guide, and has a second light guide, which has a first narrow side that is opposite the light exit surface of the first light guide along its length and serves as a light entry surface, and a first narrow side as a Light exit surface serving second narrow side, which are separated from the first narrow side by lying between the narrow sides broad sides of the light guide.
  • the lamp module has at least one transparent lens which extends from the second narrow side of the second light guide in the direction of the first narrow side and which extends along the longitudinal extension of the narrow sides of the second light guide.
  • the second light guide is also referred to below as thick-wall optics.
  • Such a lamp module is used to generate a signal light distribution such as a daytime running light distribution.
  • the second light guide mainly has the function of a design element.
  • the broad sides lying between the narrow sides of the thick-wall optics serve as transport surfaces on which the light propagating from the light entry surface of the thick-wall optics to its light exit surface undergoes total internal reflections.
  • At least one of the broad sides is often visible from the outside. This applies in particular to headlights that also accommodate other light modules and therefore have a large light exit opening that is often covered by a smooth cover plate.
  • their appearance often has a higher priority than optimizing these areas in terms of lighting technology. If, for example, the broad sides are to be frosted for design reasons, this is at the expense of efficiency and, under certain circumstances, also at the expense of the homogeneity of the appearance of the light exit surface, because the conditions prevailing inside the second light guide on the frosted surface are different for internal worsen total internal reflections.
  • Luminaire modules with elongated light guides are also from the DE 10 2006 032 373 A1 , the U.S. 5,668,913 and the JP 2014-235819 famous.
  • the object of the invention is to specify a lighting device of the type mentioned at the outset, in which the greatest possible freedom of design is possible not at the expense of the efficiency and the homogeneity of the appearance of the light exit surface of the thick-wall optics.
  • the lighting device according to the invention differs from the prior art in that the second light guide has a cross section that increases monotonically from its light entry surface to its light exit surface.
  • the transparent lens covers the broad sides and is therefore more visible to the viewer than the broad side of the thick-wall optics 14 behind the transparent lens.
  • the transparent lens can have a frosting for design reasons, for example.
  • the broad side, which is behind the transparent cover panel for the observer, can be optimized in terms of lighting without regard to design requirements. In particular, it can be as smooth as a mirror in order to enable total internal reflections that are as lossless as possible. Since both the lens and the thick-wall optics are transparent, the appearance of the lighting module according to the invention is similar to the appearance of a thick-wall optics without a lens.
  • a preferred embodiment is characterized in that the lens has a side surface facing away from the broad side of the second light guide, which is clear, frosted or provided with surface structures.
  • the second light guide has a monotonically increasing cross-section from its light entry surface to its light exit surface, there is also a Free-form surface or a parabolic shape conceivable.
  • the broad sides of the second light guide are as smooth as glass.
  • a further preferred embodiment is characterized in that the light exit surface of the second light guide is smooth or stepped or provided with scattering, pillow-shaped optics.
  • the light entry surface of the second light guide is smooth or stepped or provided with scattering, pillow-shaped optics.
  • an elongated rear side of the light guide opposite the light exit surface of the light guide has light-deflecting structures that are prism-shaped.
  • Another preferred embodiment is characterized in that the elongated first light guide is fed with light from both of its end faces.
  • the light coupled in via one end face has the same color as the light coupled in via the other end face. This improves the uniformity of the brightness of the light exit surface.
  • the light coupled in via one end face has a different color than the light coupled in via the other end face, so that two light functions can be fulfilled with one light guide.
  • An alternative configuration to this is characterized in that the lighting module has a second transparent lens arranged below the thick-wall optics.
  • the two light discs merge into one another at one end or at both lateral ends of the second light guide, which serve neither as a light entry surface nor as a light exit surface, so that the second light guide, with the exception of its light entry surface and its light exit surface, has a light disc that is curved in space is enveloped.
  • the figure 1 a lamp module 10 for a motor vehicle lighting device, which has an elongated first light guide 12, a second light guide 14 and two lenses 16 and 18.
  • the figure 2 shows the subject of figure 1 in a lateral cross section.
  • the x-direction 10 indicates a main emission direction of the lighting module.
  • the x-direction is parallel to a longitudinal axis of the vehicle, for example.
  • the y-direction is parallel to a lateral axis of the vehicle and the z-direction is parallel to a vertical axis of the vehicle and points upwards.
  • this is only an example and is not intended to limit the invention.
  • the first light guide 12 has a light exit surface 20 extending along the elongated first light guide 12 .
  • the second light guide 14 has a first narrow side 22 that is opposite the light exit surface 20 of the first light guide 12 along its length and serves as a light entry surface, and a second narrow side 24 that serves as a light exit surface.
  • the second narrow side 24 is separated from the first narrow side 22 by broad sides 26, 28 of the second lying between the narrow sides 22, 24 Light guide 14 separately.
  • the transparent lens 16 extends from the second narrow side 24 of the second light guide 14 in the direction of the first narrow side 22 of the second light guide 14. This direction is essentially opposite to the main emission direction.
  • the transparent lens 16 extends transversely thereto along the longitudinal extent of the narrow sides 22, 24 of the second light guide. In this example, the longitudinal extent runs essentially parallel to the y-direction.
  • the lens 16 has a side surface 16.1 facing away from the broad side 26 of the second light guide 14. Depending on the design specification, this side surface 16.1 is clear, frosted or provided with surface structures which are intended to appeal to the viewer visually but do not have any lighting effect.
  • the lens 16 can be used as a surface that can be designed for the appearance, while the broad side 26 can be used to optimize the optical function of the thick-wall optics. This applies analogously to the broad side 28 and the lens 18.
  • the thick-wall optics ie the second light guide 14 has according to the invention, as in particular figure 2 as can be seen, has a cross section which increases monotonously from its light entry surface 22 to its light exit surface 24 .
  • a parabolic cross section or a free-form surface is also possible.
  • the cross section of the second light guide which increases in the direction of propagation of the light in the second light guide, results in a parallelization of the light as a result of internal total reflections. This contributes to a desired homogeneity of the interior of the second Light guide 14 from occurring illumination of its light exit surface 24 at.
  • this shape increases the opening angle of the light that experiences total internal reflections within the second light guide. This increases the efficiency of the light guide, i.e. the ratio of light that is specifically coupled out to the light that is coupled in.
  • the lateral surfaces, ie the broad sides 26, 28 of the second light guide 14 are preferably mirror-smooth, which enables total internal reflections that are practically lossless. This photometric effect of the practically lossless total internal reflection contributes to the desired high efficiency.
  • the light exit surface 24 of the thick-wall optics 14 is smooth or stepped or provided with scattering, pillow-shaped optics, depending on the lighting and design requirements. This applies analogously to the light entry surface 22 of the thick-wall optics 14, which can accordingly also be smooth or stepped or provided with scattering, pillow-shaped optics. Steps are preferably provided from a sweep angle of 30°. A sweep is understood to mean that the light exit surface (in the case of a stepped light guide, an envelope) of the light exit surface encloses an angle with the transverse axis of the vehicle. f
  • first light guide 12 In the first light guide 12, light fed from a light source (not shown in the figure) into an end face 12.1 of the first light guide 12 propagates essentially along the first light guide 12. The light experiences internal light on a smooth light exit surface 20 and on smooth side walls 12.2 of the first light guide 12 total reflections.
  • These structures deflect light impinging on them so steeply to the light exit surface 20 of the elongated first light guide 12 that the deflected light emerges distributed over the elongated light exit surface 20 of the first light guide 12 and via the light exit surface 20 of the first light guide 12 opposite the light entry surface 22 of the second light guide 14 enters the second light guide 14 .
  • two colors of light are coupled into the light guide 12 via a single end face of the elongated first light guide 12 .
  • the elongated first light guide 12 can be supplied with light from one of its two end faces 12.1, 12.4.
  • the light coupled in via one end face can have the same color as the light coupled in via the other end face.
  • the light coupled in via one end face can have a different color than the light coupled in via the other end face.
  • a flashing light function using yellow or yellow-red light can be implemented with the same arrangement of first light guide, thick-wall optics and lens as a daytime running light function or position light function using white light.
  • the lamp module 10 has a second transparent lens 18 arranged below the thick-wall optics 24 .
  • the two lenses 16, 18 can also be at one end or at both lateral ends of the thick-wall optics 14, ie on both sides of the Thick-wall optics 14, which in the illustrated embodiment serve neither as a light entry surface 22 nor as a light exit surface 24, merge into one another, so that the thick-wall optics 14, with the exception of its light entry surface 22 and its light exit surface 24, is enveloped by a lens that is curved in space.

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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)
  • Planar Illumination Modules (AREA)

Claims (11)

  1. Module d'éclairage (10) pour un dispositif d'éclairage de véhicule automobile, comprenant un premier guide de lumière allongé (12) qui comprend une surface de sortie de lumière (20) s'étendant le long du premier guide de lumière allongé (12), et un second guide de lumière (14) qui comprend un premier côté étroit (22) opposé à la surface de sortie de lumière (20) du premier guide de lumière (12) le long de son étendue longitudinale et qui sert de surface d'entrée de lumière, et un second côté étroit (24) qui sert de surface de sortie de lumière et qui est séparé du premier côté étroit (22) par des côtés larges (26, 28) du second guide de lumière (14) situés entre les côtés étroits (22, 24), et comprenant au moins un cabochon transparent (16, 18) qui s'étend depuis le second côté étroit (24) du second guide de lumière (14) en direction de son premier côté étroit (22) et qui s'étend le long de l'étendue longitudinale des côtés étroits (22, 24) du second guide de lumière (14), caractérisé en ce que le second guide de lumière (14) présente une section transversale qui augmente de manière monotone depuis sa surface d'entrée de lumière (22) jusqu'à sa surface de sortie de lumière (24).
  2. Module d'éclairage (10) selon la revendication 1, caractérisé en ce que le cabochon (16) comprend une surface latérale (16.1) qui est tournée à l'opposé d'un côté large (26) du second guide de lumière (14) et qui est transparente, mate ou pourvue de structures de surface.
  3. Module d'éclairage (10) selon l'une des revendications précédentes, caractérisé en ce que les côtés larges (26, 28) du seconde guide de lumière (14) sont lisses comme un miroir.
  4. Module d'éclairage (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que la surface de sortie de lumière (24) du seconde guide de lumière (14) est lisse ou étagée ou est munie d'optiques de dispersion en forme de coussin.
  5. Module d'éclairage (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que la surface d'entrée de lumière (22) du seconde guide de lumière (14) est lisse ou étagée ou est pourvue d'optiques de dispersion en forme de coussin.
  6. Module d'éclairage (10) selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un côté arrière (12.3) allongé du premier guide de lumière (12), qui est opposé à la surface de sortie de lumière (20) du premier guide de lumière (12), comprend des structures de déviation de lumière en forme de prisme.
  7. Module d'éclairage (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que le premier guide de lumière allongé (12) est alimenté en lumière à partir de ses deux côtés avant (12.1, 12.4).
  8. Module d'éclairage (10) selon la revendication 7, caractérisé en ce que la lumière injectée par un côté avant a la même couleur que la lumière injectée par l'autre côté avant.
  9. Module d'éclairage (10) selon la revendication 7, caractérisé en ce que la lumière injectée par un côté avant a une couleur différente de la lumière injectée par l'autre côté avant.
  10. Module d'éclairage (10) selon l'une quelconque des revendications précédentes, caractérisé en ce que le module d'éclairage (10) comprend un second cabochon transparent (18) disposé au-dessous du second guide de lumière (14).
  11. Module d'éclairage (10) selon la revendication 10, caractérisé en ce que les deux cabochons (16, 18) se rejoignent à une extrémité ou aux deux extrémités latérales du second guide de lumière (14) qui ne servent ni de surface d'entrée de lumière ni de surface de sortie de lumière, de sorte que le second guide de lumière (14), à l'exception de sa surface d'entrée de lumière et de sa surface de sortie de lumière, est entouré par un cabochon qui est incurvé dans l'espace.
EP16200635.7A 2015-12-02 2016-11-25 Module d'éclairage ayant deux guides de lumière Active EP3176494B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202015008368.4U DE202015008368U1 (de) 2015-12-02 2015-12-02 Leuchtenmodul mit einer Dickwandoptik

Publications (2)

Publication Number Publication Date
EP3176494A1 EP3176494A1 (fr) 2017-06-07
EP3176494B1 true EP3176494B1 (fr) 2022-04-20

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EP16200635.7A Active EP3176494B1 (fr) 2015-12-02 2016-11-25 Module d'éclairage ayant deux guides de lumière

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EP (1) EP3176494B1 (fr)
DE (1) DE202015008368U1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN207262329U (zh) 2017-04-27 2018-04-20 法雷奥照明湖北技术中心有限公司 光束调整装置与车灯组件
CN108980773A (zh) * 2018-10-19 2018-12-11 华域视觉科技(上海)有限公司 多角度导光体及用于车灯灯具
EP3779272A1 (fr) * 2019-08-14 2021-02-17 ZKW Group GmbH Dispositif d'éclairage pour un phare de véhicule automobile
TWI761275B (zh) * 2021-08-05 2022-04-11 坦德科技股份有限公司 車用信號燈具結構以及車用日行燈
FR3145399A1 (fr) * 2023-01-31 2024-08-02 Valeo Vision Guide de lumière comme source de lumière secondaire

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Publication number Priority date Publication date Assignee Title
US5506929A (en) * 1994-10-19 1996-04-09 Clio Technologies, Inc. Light expanding system for producing a linear or planar light beam from a point-like light source
DE102006032373A1 (de) * 2006-07-13 2008-01-17 Automotive Lighting Reutlingen Gmbh Leuchtenanordnung für einen Kraftfahrzeugscheinwerfer oder eine Kraftfahrzeugheckleuchte
EP2049365B1 (fr) * 2006-08-01 2017-12-13 3M Innovative Properties Company Dispositif d'éclairage
DE102011076621B4 (de) * 2011-05-27 2017-03-02 Automotive Lighting Reutlingen Gmbh Beleuchtungseinrichtung für ein Kraftfahrzeug
JP2013191406A (ja) * 2012-03-14 2013-09-26 Koito Mfg Co Ltd 車両用灯具
JP6050048B2 (ja) * 2012-08-01 2016-12-21 株式会社小糸製作所 車両用灯具
JP6251985B2 (ja) * 2013-05-31 2017-12-27 市光工業株式会社 車両用灯具

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DE202015008368U1 (de) 2017-03-03
EP3176494A1 (fr) 2017-06-07

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