EP1170545B1 - Guide de lumière en forme de barre - Google Patents

Guide de lumière en forme de barre Download PDF

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Publication number
EP1170545B1
EP1170545B1 EP01116157A EP01116157A EP1170545B1 EP 1170545 B1 EP1170545 B1 EP 1170545B1 EP 01116157 A EP01116157 A EP 01116157A EP 01116157 A EP01116157 A EP 01116157A EP 1170545 B1 EP1170545 B1 EP 1170545B1
Authority
EP
European Patent Office
Prior art keywords
light
rod
face
longitudinal axis
light 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.)
Expired - Lifetime
Application number
EP01116157A
Other languages
German (de)
English (en)
Other versions
EP1170545A3 (fr
EP1170545A2 (fr
Inventor
Cornelius Neumann
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.)
Hella GmbH and Co KGaA
Original Assignee
Hella KGaA Huek and Co
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 Hella KGaA Huek and Co filed Critical Hella KGaA Huek and Co
Publication of EP1170545A2 publication Critical patent/EP1170545A2/fr
Publication of EP1170545A3 publication Critical patent/EP1170545A3/fr
Application granted granted Critical
Publication of EP1170545B1 publication Critical patent/EP1170545B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F21S43/249—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
    • F21S43/10—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
    • F21S43/242—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

Definitions

  • the invention relates to a rod-shaped light guide according to the preamble of Claim 1.
  • Rod-shaped light guides are used in motor vehicles, for. B. as a signal lamp or used to illuminate display devices.
  • DE 41 29 094 A1 and DE 198 03 518 A1 are rod-shaped Light guides which have a light exit surface radiating transversely to their longitudinal direction exhibit.
  • the light exit surfaces are opposite each other reflective surfaces arranged.
  • the reflective surfaces have a Large number of prisms on the transverse axis of the rod-shaped light guide are arranged.
  • the two Side faces lie on a common diameter, so the cross section the rod-shaped light guide essentially, d. H. with the exception of reflective surface, is circular.
  • a disadvantage of the known light guides with essentially circular Cross-section is that due to their point-symmetrical structure only a part of the light coupled into the light guide a point or little diffuse emitting light source via the prisms and the light exit surface becomes. If the reflective surface is opposite in the horizontal direction The surface and light exit surface is the optical one, particularly in the vertical direction Efficiency undesirably low.
  • a rod-shaped light guide of the generic type is known from US Pat. No. 4,924,357 A, which has two opposite side surfaces, one Connect the light exit surface and a reflective surface. This Side surfaces form arranged transversely to the longitudinal axis of the rod body Cross-section two light-concentrating points, so that parallel to the longitudinal axis non-centric focal lines are formed.
  • the well-known rod-shaped light guide enables in particular the coupling out of a parallel light beam.
  • the object of the present invention is the known rod-shaped light guide to improve so that the ratio of coupled to uncoupled Light improves and an increase in efficiency while at the same time more vertical Concentration of light distribution is reached.
  • the focal lines formed are the optical efficiency of the rod-shaped Optical fiber significantly improved.
  • the vertical light distribution concentrated around one axis compared to the known light guides. Via the non-centric focal lines created in the rod-shaped light guide the coupled light is scattered and distributed more favorably for decoupling. This allows the otherwise unusable light to be extracted and increases so the optical efficiency.
  • With the present invention it is possible to reduce the vertical scatter and thus concentrate the light distribution. This enables higher light intensities to be achieved
  • the light-concentrating points or Focal points within the rod body are two non-centric focal lines, which scatter the centrally coupled light and onto the reflecting surface to steer.
  • the cross section is of the rod body is essentially elliptical.
  • At in horizontal Direction of opposing reflecting surface and light exit surface is a first light-concentrating point in the vertical direction above a center located on the longitudinal axis and a second light-concentrating one Point located below the center.
  • the inventive cross-sectional profile forms of the inventive cross-sectional profile the center in connection with of the reflecting surface a third light-concentrating point, so that an additional centric focal line is created.
  • the Cross section of the rod body seen three light-concentrating points or three light centers, through which the multiple reflected light on the reflective Area is steered.
  • the Rod body formed as an ellipsoid, the one arranged transversely to the longitudinal axis Eccentricity is adjusted to the length of the rod body in order to coupling out a lot of light.
  • the eccentricity can also - at least within limits - determine the required vertical spread.
  • a short length of Rod body means a higher eccentricity and vice versa.
  • the light coupling surface is an approximately punctiform light source.
  • the light source is a light emitting diode (LED) or less diffuse emitting light source in the form of an incandescent lamp with an ellipsoid reflector.
  • the light-deflecting means of the reflective surface as a variety of transverse to Prisms arranged in the longitudinal axis are formed.
  • a rod-shaped light guide essentially consists of a rod body 1 with a first face 2, a second face 3, a reflective Surface 4, a light exit surface 5, a first side surface 6 and one second side surface 7.
  • the rod body 1 has at a first end 9 transverse to its longitudinal axis 8 the first end face 2 and at its second end facing away from the first end 9 End 10, the second end face 3.
  • the rod-shaped Light guide or the rod body 1 from the reflecting surface 4 and on its front side 12 opposite the rear side 11 becomes the rod body 1 limited by the light exit surface 5.
  • the reflective surface 4 is over the side surfaces 6, 7 connected to the light exit surface 5.
  • a point-shaped light source 13 is in front of each of the end faces 2, 3.
  • the light source 13 is e.g. B. formed as a photodiode (LED).
  • the end faces 2, 3 are designed as light coupling surfaces.
  • the reflective surface 4 has light-deflecting means which, for. B. are formed as a plurality of arranged across the longitudinal axis 8 prisms 14.
  • the side surfaces 6, 7 are shaped convexly towards the outside and form an essentially elliptical cross section of the rod body 1. From the first side surface 6 lying above in the example, a first light-concentrating point (F 1 ) 15 becomes above the center point 16 lying on the longitudinal axis 8 educated.
  • a second light-concentrating point 17 is formed by the second side surface 7 below the center point 16.
  • the center point 16 acts as a third light-concentrating point 18.
  • the rod body 1 is thus designed as an ellipsoid, the first light-concentrating points 15 of which form a first focal line 19 and the second light-concentrating points 17 form a second focal line 20.
  • the focal lines 19, 20 run at a distance parallel to a third focal line 21 formed by the center points 16, which coincides with the longitudinal axis 8.
  • the eccentricity of the ellipsoid or the rod body 1, which is transverse to the longitudinal axis 8 is arranged, is adapted to the length of the rod body 1, if possible coupling out a lot of light.
  • the eccentricity is also within certain limits adapted to the required vertical spread.
  • the light emitted by the light sources 13 is transmitted via the end faces 2, 3, which are designed as light coupling surfaces, are coupled into the rod body 1 and passed on through total reflection.
  • the prisms 14 of the reflective Surface 4 light is reflected and occurs on the prisms 14th opposite light exit surface 5. Not covered by prisms 14 Light rays are reflected on the side surfaces 6, 7 and to the Focal lines 19, 20, 21 concentrated.
  • FIG. 3 shows, by way of example, the course of some light rays until they strike the prisms 14 are shown in a cross-sectional projection. Points 15, 16, 17 form three "focal points of light" over which the frequently reflected light is directed onto the prisms 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Claims (9)

  1. Guide de lumière en forme de barre notamment pour une lampe de signalisation pour véhicules automobiles, constitué par un corps en forme de barre (1) comportant au moins une surface d'injection de lumière (2,3) et une surface de sortie de lumière (5), qui est disposée dans la direction d'un axe longitudinal (8) et rayonne transversalement par rapport à l'axe longitudinal, une surface réfléchissante (4) qui est située à l'opposé de la surface (5) de sortie de la lumière et comportant des moyens de déviation de la lumière, qui émettent par l'intermédiaire de la surface (5) de sortie de la lumière une lumière injectée par l'intermédiaire de la surface (2,3) d'injection de la lumière, et comportant deux surfaces latérales (6,7) à l'opposé l'une de l'autre, qui relient entre elles la surface (5) de sortie de la lumière et la surface réfléchissante (4), les surfaces latérales (6,7) formant, dans la section transversale disposée transversalement par rapport à l'axe longitudinal (8), du corps en forme de barre (1) au moins deux points (15,17) de concentration de la lumière, de sorte qu'il apparaít, parallèlement à l'axe longitudinal (8), des lignes focales non centrées (19,20), sur lesquelles les points (15,17) de concentration de lumière des surfaces latérales associées (6,7) sont disposées, caractérisé en ce que dans le cas la surface réfléchissante (4) et de la surface (5) de sortie de lumière disposées à l'opposé l'une de l'autre dans la direction horizontale, un premier point (15) de concentration de la lumière est disposé, dans la direction verticale, au-dessus d'un centre (16) situé sur l'axe longitudinal (8), et qu'un second point (17) de concentration de la lumière est disposé au-dessous du centre (16).
  2. Guide de lumière en forme de barre selon la revendication 1, caractérisé en ce que la section transversale du corps en forme de barre (1) est réalisée avec une forme essentiellement elliptique.
  3. Guide de lumière en forme de barre selon la revendication 1 ou 2, caractérisé en ce que le centre (16) forme, en liaison avec la surface réfléchissante (4), un troisième point (18) de concentration de la lumière.
  4. Guide de lumière en forme de barre selon l'une des revendications 1 à 3, caractérisé en ce que le corps en forme de barre (1) est réalisé en forme d'ellipsoïde, dont l'excentricité, qui s'étend transversalement par rapport à l'axe longitudinal (8), est adapté à la longueur du corps en forme de barre (1) pour réaliser le découplage d'une quantité aussi grande que possible de lumière.
  5. Guide de lumière en forme de barre selon la revendication 4, caractérisé en ce que l'excentricité est réglée sur la largeur de dispersion verticale nécessaire.
  6. Guide de lumière en forme de barre selon l'une des revendications 1 à 5, caractérisé en ce qu'une source de lumière (13), émettant un rayonnement approximativement de forme ponctuelle est disposée devant les faces frontales (2,3).
  7. Guide de lumière en forme de barre selon la revendication 6, caractérisé en ce que la source de lumière (13) est agencée sous la forme d'une lampe à incandescence comportant un réflecteur ellipsoïdal, et que les moyens de déviation de la lumière de la surface réfléchissante (4) sont réalisés sous la forme d'une multiplicité de prismes (14) disposés transversalement par rapport à l'axe longitudinal.
  8. Guide de lumière en forme de barre selon la revendication 6, caractérisé en ce que la source de lumière (13) est agencée sous la forme d'une diode à luminescence.
  9. Guide de lumière en forme de barre selon l'une des revendications 1 à 8, caractérisé en ce que les moyens de déviation de lumière de la source réfléchissante (4) sont réalisés sous la forme d'une multiplicité de prismes (14) disposés transversalement par rapport à la direction longitudinale (8).
EP01116157A 2000-07-07 2001-07-04 Guide de lumière en forme de barre Expired - Lifetime EP1170545B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10033133A DE10033133A1 (de) 2000-07-07 2000-07-07 Stabförmiger Lichtleiter
DE10033133 2000-07-07

Publications (3)

Publication Number Publication Date
EP1170545A2 EP1170545A2 (fr) 2002-01-09
EP1170545A3 EP1170545A3 (fr) 2003-03-05
EP1170545B1 true EP1170545B1 (fr) 2004-10-06

Family

ID=7648181

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01116157A Expired - Lifetime EP1170545B1 (fr) 2000-07-07 2001-07-04 Guide de lumière en forme de barre

Country Status (3)

Country Link
EP (1) EP1170545B1 (fr)
DE (2) DE10033133A1 (fr)
ES (1) ES2228703T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005047793A1 (de) * 2005-10-05 2007-04-12 Hella Kgaa Hueck & Co. Beleuchtungseinrichtung für ein Kraftfahrzeug
US7639918B2 (en) 2008-05-05 2009-12-29 Visteon Global Technologies, Inc. Manifold-type lightguide with reduced thickness
US7695179B2 (en) 2007-03-16 2010-04-13 Visteon Global Technologies, Inc. Illuminating device
US10838137B2 (en) 2017-08-29 2020-11-17 Varroc Lighting Systems, s.r.o. Lighting device with high efficiency and uniformity

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007023076B4 (de) 2007-05-16 2012-02-16 Automotive Lighting Reutlingen Gmbh Beleuchtungseinrichtung für Kraftfahrzeuge
US8333493B2 (en) 2009-04-03 2012-12-18 North American Lighting, Inc. Dual-direction light pipe for automotive lighting
GB2543246B (en) * 2015-07-29 2021-01-13 Karbon Kinetics Ltd Handlebar mountable light pipe apparatus for a bicycle

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0638626B2 (ja) * 1985-12-17 1994-05-18 工業技術院長 光源ユニット
DE4117278A1 (de) * 1991-05-27 1992-12-03 Hella Kg Hueck & Co Innenleuchte fuer kraftfahrzeuge
DE4129094B4 (de) * 1991-09-02 2005-08-25 Hella Kgaa Hueck & Co. Signalleuchte mit Leuchtdioden als Lichtquelle für Kraftfahrzeuge und deren Verwendung für unterschiedliche Signalleuchtenfunktionen
US5339382A (en) * 1993-02-23 1994-08-16 Minnesota Mining And Manufacturing Company Prism light guide luminaire with efficient directional output
EP0961901A1 (fr) * 1996-01-19 1999-12-08 Lumenyte International Corporation Canal optique a eclairage lateral
JPH09325221A (ja) * 1996-04-04 1997-12-16 Hitachi Cable Ltd 照明装置
DE19740265A1 (de) * 1997-09-12 1999-03-18 Willing Gmbh Dr Ing Seitlich lichtabstrahlender Lichtleiter
DE19803518A1 (de) * 1998-01-30 1999-08-05 Hella Kg Hueck & Co Stabförmiger Lichtleiter
DE19857561A1 (de) * 1998-12-14 2000-06-21 Valeo Beleuchtung Deutschland Leuchte, insbesondere für Kraftfahrzeuge

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005047793A1 (de) * 2005-10-05 2007-04-12 Hella Kgaa Hueck & Co. Beleuchtungseinrichtung für ein Kraftfahrzeug
US7695179B2 (en) 2007-03-16 2010-04-13 Visteon Global Technologies, Inc. Illuminating device
US7639918B2 (en) 2008-05-05 2009-12-29 Visteon Global Technologies, Inc. Manifold-type lightguide with reduced thickness
US10838137B2 (en) 2017-08-29 2020-11-17 Varroc Lighting Systems, s.r.o. Lighting device with high efficiency and uniformity

Also Published As

Publication number Publication date
DE50103947D1 (de) 2004-11-11
EP1170545A3 (fr) 2003-03-05
EP1170545A2 (fr) 2002-01-09
ES2228703T3 (es) 2005-04-16
DE10033133A1 (de) 2002-01-17

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