EP1367318B1 - Signalleuchte mit einem optischen Element zur selbständigen Ausführung einer Signalfunktion - Google Patents

Signalleuchte mit einem optischen Element zur selbständigen Ausführung einer Signalfunktion Download PDF

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Publication number
EP1367318B1
EP1367318B1 EP03291049A EP03291049A EP1367318B1 EP 1367318 B1 EP1367318 B1 EP 1367318B1 EP 03291049 A EP03291049 A EP 03291049A EP 03291049 A EP03291049 A EP 03291049A EP 1367318 B1 EP1367318 B1 EP 1367318B1
Authority
EP
European Patent Office
Prior art keywords
light
source
optical axis
generally
indicator light
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
EP03291049A
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English (en)
French (fr)
Other versions
EP1367318A1 (de
Inventor
Jean-Pierre Aynie
Norbert Brun
Benoist Fleury
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.)
Valeo Vision SAS
Original Assignee
Valeo Vision SAS
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Filing date
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP1367318A1 publication Critical patent/EP1367318A1/de
Application granted granted Critical
Publication of EP1367318B1 publication Critical patent/EP1367318B1/de
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
    • F21S43/247—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
    • F21S43/10—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
    • F21S43/239—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
    • F21S43/245—Light guides characterised by the emission area emitting light from one or more of its major surfaces

Definitions

  • the invention more particularly provides a signaling, in particular for a motor vehicle, of the type having a central optical axis oriented from rear to front, according to the direction of propagation of the light beam emitted by the fire, a generally point light source arranged on this optical axis, and a solid optical part, at least in part of revolution around the optical axis, which is carried out in a transparent material with a higher refractive index than air, of the type in which the optical part has a surface of entry, and a generally transverse exit surface which is designed to transmit light rays forward, in a direction generally parallel to the optical axis, e so as to perform a specific signaling function.
  • the structure of the parabolic reflector limits the front opening of the traffic light, i.e. the area of the outlet surface.
  • the small axial thickness of the light therefore implies a small exit surface, so that the luminance of the fire by area unit is important.
  • signal lights of known types are not suitable for the use of a small light source dimension, such as a light emitting diode, which emits its luminous flux in a solid angle of determined value, less than one hundred and eighty degrees.
  • the sources luminaires conventionally used in signaling lights are filament lamps, which emit light overall in all directions from the filament.
  • the invention aims to remedy the aforementioned drawbacks, by offering a traffic light which may have a low axial thickness, while having sufficient outlet surface to perform the signaling function, and which is adapted to the use of a light source such as a diode emitting.
  • Figures 1 and 2 show a signaling 10 which is carried out in accordance with a first mode for carrying out the invention.
  • This signal light 10 comprises an optical part full 12 which serves as both a luminous flux recuperator and a light flux diffuser for a light source overall point, here consisting of a light emitting diode 14.
  • Diode 14 has been shown mounted on a circuit board. support 16, at the rear, which allows in particular its connection to a power supply network and a control unit (not shown).
  • the diodes 14 are available in several colors, it is to say that it is possible to choose the coloring of the luminous flux emitted by diode 14.
  • the color of the diode 14 according to the signaling function to be performed by example red for a fog light function, or white for a reversing light function.
  • the optical part 12 and the diode 14 are arranged coaxially along a central optical axis A-A which extends generally horizontally from left to right, in considering figure 2.
  • connection box 18 includes means for fixing and electrical connection (not shown) for the mounting of the diode 14 on the plate 16.
  • diode 14 is a light source point S, which emits light rays radially, generally forward, from the center S of the hemisphere forming the globe 20.
  • the center S generally corresponds to the heart of the source luminous, i.e. the point of the source from which seems to come most of the luminous flux.
  • the optical part 12 is produced in a single piece by molding in transparent plastic such as, for example, polymethyl methacrylate (PMMA).
  • transparent plastic such as, for example, polymethyl methacrylate (PMMA).
  • the reflection surface 24 generally extends in a plane transverse to the optical axis A-A, passing through the center S of the light source 14.
  • the outer annular part 30 is formed by a series of reflective rings 36 coaxial along the optical axis A-A.
  • the acute angle which defines each generator of a neutral ring 38 with the optical axis A-A, increases gradually as one moves away from the axis A-A.
  • the exit surface 26 of the optical part 12 extends generally in a transverse plane, axially opposite the reflection surface 24.
  • the center C of the central part 42 is offset axially backwards from the center S of the entry surface 22.
  • the central part 42 defines, with the center S of the source light 14, a solid angle ⁇ of determined value.
  • the value of the solid angle ⁇ is, for example, equal to about a hundred degrees.
  • the diameter outside of the outer annular part 30 of the surface of reflection 24 is equal to the outside diameter of the annular part 40 of the outlet surface 26.
  • the optical part 12 therefore comprises a peripheral cylindrical surface 44 which connects the surface of reflection 24 at the exit surface 26.
  • central part 42 of the surface of outlet 26 works like a converging lens whose focus is the center S of the light source 14.
  • the light rays R2 which are emitted by the source 14, and which reach the annular part 40, directly after crossing the entry surface 22, are reflected on this annular part 40, according to the principle of total reflection, towards the reflecting crowns 36 of the annular part outside 30 of the reflection surface 24.
  • the angle of inclination ⁇ of the generator of the part annular 40 is chosen so that, after reflecting on reflective rings 36, light rays R2 pass through the annular part 40 while refracting towards the front, in a direction substantially parallel to the optical axis A-A.
  • the diameter of the peripheral edge 34 of the annular part exterior 30 is determined globally by the point of impact, on the reflection surface 24, of the nearest light ray R2p of the solid angle ⁇ . Indeed, the more a light ray R2 is close to the solid angle ⁇ , the greater the impact point on the surface reflection 24 is close to the optical axis A-A.
  • the invention makes it possible, for example, to produce a signaling 10 whose axial depth is less than thirty millimeters, for a front opening, i.e. for a overall dimensions at the exit of the light 10, at least eighty millimeters.
  • each reflecting crown 36 is faceted, that is to say that it comprises a series of facets of elementary reflections (not shown), which are for example circumferentially adjacent to each other.
  • Each facet is provided to spatially distribute the light rays forward so that the traffic light 10 forms at the front a lighting beam performing a function of regulatory signage chosen.
  • each facet has an optimized profile to achieve at the front of the traffic light 10, on a measurement screen, an image generally in the form of diamond.
  • the diamond is not regular. It must have a height, along a vertical axis, less than its width, along an axis horizontal. So the profile of each facet must be optimized to allow a shape to form on the measurement screen approximates the diamond sought here.
  • the power supply of the light source 14 is more complex to design, because it must be carried out by the front of the light 10. It may be necessary, for example, to run a power cable in front of the surface of exit 26.
  • the reflecting surface 24 here has the shape of a cap spherical centered on the optical axis A-A, whose radius is large enough for the reflection surface 24 to be generally transverse, and whose axial depth is substantially equal to the axial depth of the optical part 12.
  • the outer peripheral edge of the reflecting surface 24 is here directly connected to the outer peripheral edge of the outlet surface 26.
  • the light rays R3 which are contained in a solid angle ⁇ of determined value, from the source 14, cannot have a sufficient angle of inclination relative to to the reflection surface 24, to reflect on the principle of total reflection on the reflection surface 24.
  • the outlet surface 26 has the shape of a centered crown on the optical axis A-A, which includes an annular part interior 46, optically neutral, and an annular part exterior 48.
  • the outer annular part 48 of the outlet surface 26 is made here in the form of a Fresnel lens, which comprises a series of concentric annular dioptres 52.
  • the spokes luminous R4 are refracted by the dioptres 52 so that they are emitted forward in a direction substantially parallel to the optical axis A-A, to perform the signaling function.
  • the inner annular part 46 of the outlet surface 26 is optically neutral, since it does not receive no light rays coming from the diode 14.
  • the part optic 12 is optically “autonomous”, ie it performs the signaling function on its own, without it being necessary to add a reflector and / or diffusion glass.
  • the signaling light 10 according to the invention can be arranged inside a case comprising a glass external protection, for example in a case which groups together all traffic lights associated with the different functions regulations.

Landscapes

  • 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 Communication System (AREA)
  • Holo Graphy (AREA)
  • Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)

Claims (12)

  1. Signalleuchte (10), insbesondere für ein Kraftfahrzeug, des Typs mit einer optischen Mittelachse (A-A), die der Ausbreitungsrichtung des von der Leuchte (10) emittierten Lichtbündels folgend von hinten nach vorne ausgerichtet ist, einer auf dieser optischen Achse (A-A) angeordneten, allgemein punktförmigen Lichtquelle (14) und einem wenigstens zum Teil um die optische Achse (A-A) herum angeordneten massiven optischen Element (12), das aus einem transparenten Material mit einem Brechungsindex größer als der der Luft ausgeführt ist, des Typs, bei dem das optische Element (12) eine Eintrittsfläche (22), eine allgemein quer verlaufende Austrittsfläche (26), die zum Übertragen der Lichtstrahlen (R) nach vorne in einer allgemein zur optischen Achse (A-A) parallelen Richtung konzipiert ist, um eine bestimmte Signalgebungsfunktion auszuführen, und eine allgemein quer verlaufende Reflexionsfläche (24) umfasst, die der Austrittsfläche (26) axial gegenüber angeordnet ist,
    dadurch gekennzeichnet, dass die Eintrittsfläche (22) axial zwischen der Reflexionsfläche (24) und der Austrittsfläche (26) derart angeordnet ist, dass die durch die Eintrittsfläche (22) in das optische Element (12) eindringenden Lichtstrahlen (R) durch die Reflexionsfläche (24) zur Austrittsfläche (26) reflektiert werden.
  2. Signalleuchte (10) nach dem vorhergehenden Anspruch,
    dadurch gekennzeichnet, dass die Lichtquelle (14) wenigstens zum Teil zwischen der Reflexionsfläche (24) und der Austrittsfläche (26) angeordnet ist.
  3. Signalleuchte (10) nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass die Lichtquelle (14) eine lichtemittierende Diode mit einer Lichtstreuungsglocke (20) ist.
  4. Signalleuchte (10) nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass die Eintrittsfläche (22) allgemein die Form einer konkaven Kugelkalotte hat, deren Mitte (S) allgemein mit dem Zentrum der Lichtquelle (14) derart zusammenfällt, dass die von der Lichtquelle (14) emittierten Lichtstrahlen (R) in das optische Element (12) eindringen, und zwar im Allgemeinen ohne sich hierbei zu brechen.
  5. Signalleuchte (10) nach dem vorhergehenden Anspruch in Verbindung mit Anspruch 3,
    dadurch gekennzeichnet, dass die Lichtstreuungsglocke (20) die Form einer konvexen Kugelkalotte hat, deren Mitte allgemein mit der Mitte (S) der Eintrittsfläche (22) zusammenfällt.
  6. Signalleuchte (10) nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass die Reflexionsfläche (24) mit einer Schicht aus reflektierendem Material beschichtet ist, zum Beispiel einer Aluminiumschicht.
  7. Signalleuchte (10) nach dem vorhergehenden Anspruch,
    dadurch gekennzeichnet, dass die Reflexionsfläche (24) Reflexionskränze (36) aufweist, die zur optischen Achse (A-A) und nach vorne geneigt sind.
  8. Signalleuchte (10) nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass die Austrittsfläche (26) durch eine Diopterreihe (52) gebildet ist, die die von der Reflexionsfläche (24) kommende Lichtstrahlen (R) derart ablenkt, dass die Lichtstrahlen (R) nach vorne in einer zur optischen Achse (A-A) allgemein parallelen Richtung emittiert werden.
  9. Signalleuchte (10) nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass die Eintrittsfläche (22) nach hinten gewandt ist, und dass die Austrittsfläche (26) wenigstens einen ringförmigen Teil (40) aufweist, dessen Erzeugende bezüglich der optischen Achse (A-A) einen Neigungswinkel (α) bildet, so dass die von der Lichtquelle (14) emittierten Lichtstrahlen (R) nach dem Prinzip der Totalreflexion an diesem ringförmigen Teil (40) zur Reflexionsfläche (24) reflektiert werden.
  10. Signalleuchte (10) nach dem vorhergehenden Anspruch in Verbindung mit Anspruch 4 oder 5,
    dadurch gekennzeichnet, dass die Austrittsfläche (26) einen mittleren Teil (42) allgemein in Form einer konvexen Kugelkalotte aufweist, dessen Mitte (C) in Bezug auf die Mitte (S) der Eintrittsfläche (22) axial nach hinten derart versetzt ist, dass die von der Lichtquelle (14) emittierten Lichtstrahlen (R1), die zu dem mittleren Teil (42) gelangen, nach vorne in eine zur optischen Achse (A-A) im Wesentlichen parallelen Richtung gebrochen werden.
  11. Signalleuchte (10) nach dem vorhergehenden Anspruch,
    dadurch gekennzeichnet, dass der mittlere Teil (42) mit der Lichtquelle (14) einen Raumwinkel (β) mit bestimmtem Wert bildet, der allgemein die Lichtstrahlen (R1) beinhaltet, deren Neigungswinkel in Bezug auf den Neigungswinkel der Erzeugenden des ringförmigen Teils (40) nicht ausreicht, um deren Totalreflexion auf die Austrittsfläche (26) zu gestatten.
  12. Signalleuchte (10) nach Anspruch 8,
    dadurch gekennzeichnet, dass die Eintrittsfläche (22) nach vorne gewandt ist, und dass die Reflexionsfläche (24) wenigstens einen ringförmigen Teil (47) aufweist, dessen Erzeugende bezüglich der optischen Achse (A-A) einen Neigungswinkel bildet, derart, dass die von der Lichtquelle (14) emittierten Lichtstrahlen (R) nach dem Prinzip der Totalreflexion an diesem ringförmigen Teil (47) zur Austrittsfläche (26) reflektiert werden.
EP03291049A 2002-05-31 2003-04-30 Signalleuchte mit einem optischen Element zur selbständigen Ausführung einer Signalfunktion Expired - Lifetime EP1367318B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0206756A FR2840388B1 (fr) 2002-05-31 2002-05-31 Feu de signalisation comportant une piece optique realisant une fonction de signalisation de maniere autonome
FR0206756 2002-05-31

Publications (2)

Publication Number Publication Date
EP1367318A1 EP1367318A1 (de) 2003-12-03
EP1367318B1 true EP1367318B1 (de) 2004-10-06

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EP03291049A Expired - Lifetime EP1367318B1 (de) 2002-05-31 2003-04-30 Signalleuchte mit einem optischen Element zur selbständigen Ausführung einer Signalfunktion

Country Status (7)

Country Link
US (1) US20040207993A1 (de)
EP (1) EP1367318B1 (de)
JP (1) JP2004134357A (de)
AT (1) ATE278908T1 (de)
DE (1) DE60300076T2 (de)
ES (1) ES2229194T3 (de)
FR (1) FR2840388B1 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602004001128T2 (de) * 2004-04-21 2006-12-14 C.R.F. Società Consortile per Azioni, Orbassano Dünne, plattenförmige Kraftfahrzeugleuchte
JP4677256B2 (ja) * 2005-03-17 2011-04-27 キヤノン株式会社 発光装置
JP4585390B2 (ja) * 2005-06-23 2010-11-24 アルプス電気株式会社 環状導光体
JP4733009B2 (ja) * 2006-01-30 2011-07-27 豊田合成株式会社 車両用灯具
KR101363938B1 (ko) * 2012-07-13 2014-02-19 케이에스씨비 주식회사 자동차 후미등
ITMI20121399A1 (it) * 2012-08-07 2014-02-08 Artemide Spa Lampada di illuminazione a led
DE102013207716A1 (de) * 2013-04-26 2014-10-30 Zumtobel Lighting Gmbh LED-Leuchte mit einer Lichtleiter-Anordnung
FR3032517B1 (fr) * 2015-02-05 2018-06-29 Valeo Vision Dispositif lumineux de vehicule
JP6629601B2 (ja) * 2016-01-21 2020-01-15 株式会社エンプラス 光束制御部材、発光装置、面光源装置および表示装置

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JPS6289914A (ja) * 1985-05-31 1987-04-24 Sumitomo Electric Ind Ltd 光素子一体型光導波路およびその製法
DE3904657A1 (de) * 1989-02-16 1990-08-23 Vdo Schindling Zeigerinstrument
US5046805A (en) * 1990-07-16 1991-09-10 Simon Jerome H Tapered optical waveguides for uniform energy (light) distribution including energy bridging
JPH0651129A (ja) * 1992-07-27 1994-02-25 Inoue Denki Kk 照明装置
US5613751A (en) * 1995-06-27 1997-03-25 Lumitex, Inc. Light emitting panel assemblies
DE19547861A1 (de) * 1995-12-21 1997-06-26 Reitter & Schefenacker Gmbh Rückleuchte für Fahrzeuge, vorzugsweise Kraftfahrzeuge
US6473554B1 (en) * 1996-12-12 2002-10-29 Teledyne Lighting And Display Products, Inc. Lighting apparatus having low profile
JPH10260404A (ja) * 1997-03-18 1998-09-29 Seiko Epson Corp 照明装置、液晶表示装置及び電子機器
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US6305813B1 (en) * 1999-08-11 2001-10-23 North American Lighting, Inc. Display device using a light guide for exterior automotive lighting

Also Published As

Publication number Publication date
US20040207993A1 (en) 2004-10-21
DE60300076D1 (de) 2004-11-11
EP1367318A1 (de) 2003-12-03
FR2840388B1 (fr) 2004-07-30
ES2229194T3 (es) 2005-04-16
FR2840388A1 (fr) 2003-12-05
ATE278908T1 (de) 2004-10-15
DE60300076T2 (de) 2005-11-10
JP2004134357A (ja) 2004-04-30

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