EP2894392B1 - Beleuchtungsvorrichtung zur Beleuchtung von Straßen oder Wegen - Google Patents

Beleuchtungsvorrichtung zur Beleuchtung von Straßen oder Wegen Download PDF

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Publication number
EP2894392B1
EP2894392B1 EP14368005.6A EP14368005A EP2894392B1 EP 2894392 B1 EP2894392 B1 EP 2894392B1 EP 14368005 A EP14368005 A EP 14368005A EP 2894392 B1 EP2894392 B1 EP 2894392B1
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EP
European Patent Office
Prior art keywords
lighting device
reflection surface
light
reflector
light source
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
EP14368005.6A
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English (en)
French (fr)
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EP2894392A1 (de
Inventor
Florian Rocard
Alice Mulin
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.)
ZG Lighting France SAS
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ZG Lighting France SAS
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 ZG Lighting France SAS filed Critical ZG Lighting France SAS
Priority to EP14368005.6A priority Critical patent/EP2894392B1/de
Priority to PCT/EP2015/050247 priority patent/WO2015104327A1/en
Priority to CN201580004017.7A priority patent/CN105992906B/zh
Publication of EP2894392A1 publication Critical patent/EP2894392A1/de
Application granted granted Critical
Publication of EP2894392B1 publication Critical patent/EP2894392B1/de
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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
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/08—Lighting devices intended for fixed installation with a standard
    • F21S8/085—Lighting devices intended for fixed installation with a standard of high-built type, e.g. street light
    • F21S8/086—Lighting devices intended for fixed installation with a standard of high-built type, e.g. street light with lighting device attached sideways of the standard, e.g. for roads and highways
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/09—Optical design with a combination of different curvatures
    • 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
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/10—Outdoor lighting
    • F21W2131/103—Outdoor lighting of streets or roads

Definitions

  • the present invention relates to a lighting device for illuminating streets, roads or paths, as well as to a corresponding lighting system for illuminating streets, roads or paths.
  • WO 2006/092538 A1 discloses a device for illuminating traffic lanes having a light source arranged at a vertical height of not more than 1 m.
  • the lighting device is mounted on a guard rail (e.g. on a guard rail placed in the middle of a highway) such that the device is preferably arranged under the position of a driver.
  • a driver can be dazzled by the light of such a lighting device.
  • a lighting device for illuminating streets, roads or paths comprising: at least one light source comprising at least one light emitting diode; at least one reflector comprising an essentially saddle-shaped reflection surface, wherein the light source is arranged in such a way that at least a part of the light emitted by the light source is directed to the reflection surface of the reflector; and wherein the light is reflected by the reflection surface in such a way that a wide light distribution of the lighting device is provided at least in a direction parallel to a surface to be illuminated and perpendicular to a main axis of the reflection surface.
  • the lighting device according to the invention is preferably mounted at a height of less than two meters, e.g. the present lighting device is preferably provided below the common position of a driver sitting in a vehicle.
  • saddle-shaped has to be understood as any structure having a mainly rounded shape with an elevated area and two laterally arranged indentations (i.e. two minima in the reflection surface) extending there from, thereby providing a surface/structure commonly known from a saddle.
  • a wide light distribution i.e. a relatively broad light distribution
  • a main axis of the reflection surface e.g. a symmetry line of the saddle-shaped reflection surface
  • the presently used light source can be provided as a relatively compact structure such that there are essentially no design limitations allowing using a specifically adapted reflector (i.e. a specifically adapted and arranged reflection surface).
  • a specifically adapted reflector i.e. a specifically adapted and arranged reflection surface.
  • the light emitted by the lighting device can be adjusted in such a way that the risk for dazzling a driver can be minimized.
  • a distribution of the light can be exactly adjusted as required by the respective mounting/application conditions.
  • the reflection surface is mirror symmetrical with respect to the main axis of the reflection surface.
  • an essentially homogenous distribution of the light emitted by the lighting device can be provided in a dirpection parallel to the surface to be illuminated.
  • the reflection surface has a shape corresponding to a sector of a circle, preferably having an interior angle between 90° and 220° DEG, more preferably between 150° and 200° DEG, and even more preferably between 170° and 190° DEG. It is further preferred that in top view, the main axis of the reflection surface (i.e. the center of the elevated area) halves the reflection surface.
  • At least two indentations/minima of the reflection surface are provided at an angle between +/- 50° and +/- 90° DEG, preferably between +/- 60° and +/-85° DEG, and more preferably between +/-70° and +/- 80° DEG with respect to the main axis of the reflection surface.
  • the minima i.e. the indentations
  • the maximum width i.e. the maximum angel
  • the reflection surface does not comprise any jump discontinuities. Thereby, it is possible to provide a relatively homogenous light distribution, since thereby no overlap of the emitted light occurs.
  • the light is distributed with an angle greater than +/-50° DEG preferably greater than +/-70° DEG, and more preferably greater than +/-75° DEG with respect to the main axis of the reflection surface.
  • the light is essentially distributed over the entire shape of the reflection surface ( i.e. over the entire sector of a circle).
  • the light is distributed with an angle greater than 60° DEG preferably greater than 70° DEG, and more preferably greater than 80° DEG, and most preferably the light is distributed with an angle of about 85° DEG; preferably measured at most from a horizontal plane downwards.
  • the lighting device in a direction parallel to a surface to be illuminated and perpendicular to the main axis of the reflection surface can be provided, but also a wide light distribution perpendicular to the surface to be illuminated can be provided.
  • the at least one baffle preferably comprises an inward reflection surface for redirecting light to the reflection surface of the reflector.
  • a respective baffle can be arranged ensuring that no light is emitted parallel to the horizontal. Therefore, the baffle is preferably arranged such that it at least partially surrounds the light source in a horizontal plane and, if necessary, also above the light source (i.e. opposite to the reflection surface with respect to the light source).
  • the inward reflection surface By means of the inward reflection surface, the respective part of the emitted light is redirected to the reflection surface, thereby further usable for an illumination.
  • further baffles can be used for adjusting the shape and dimension of the emitted light.
  • the lighting device comprises a housing in which the reflector and the at least one light source are housed.
  • the reflection surface is arranged (preferably downwards) inclined (e.g. in the housing) with its main axis with respect to the horizontal plane, preferably with an angle between 20° and 60° DEG, more preferably between 30° and 50° DEG and most preferably between 35° and 45° DEG.
  • many experiments have been carried out in order to establish that the above-mentioned light distribution ranges can be provided using a saddle-shaped reflection surface which is arranged inclined with respect to the horizontal line, wherein a respective angle is dependent from the mounting height of the lighting device and from the respective surface to be illuminated.
  • the light source is a directional light source emitting light essentially only in the direction to the reflection surface of the reflector. Thereby, light losses can be minimized and also any dazzling can be further avoided.
  • the at least one light source is arranged above the main axis of the reflection surface, preferably in the center of the sector of a circle.
  • the light source preferably comprises a high brightness light emitting diode, a light emitting diode, a ray/cluster and/or a chip on board light emitting diode arrangement.
  • the lighting device comprises at least two light sources arranged with an offset with respect to the main axis of the reflection surface such that each light source emits light to a half of the mirror symmetrical shaped reflection surface.
  • each light source emits light to a half of the mirror symmetrical shaped reflection surface.
  • the present invention further relates to a lighting system for illuminating streets, roads or paths comprising a lighting device as explained above, wherein the lighting device is mounted at a height less than 2.0 m preferably between 1.5 and 0.5 m, more preferably between 1.0 and 0.7 m, and most preferably between 0.95 and 1.80 m.
  • Figure 1 is a schematic view of a lighting device 100 comprising preferably a housing 110 in which a light source module is housed, preferably comprising a high brightness light emitting diode (not shown) being arranged above a reflector 120.
  • a light source module preferably comprising a high brightness light emitting diode (not shown) being arranged above a reflector 120.
  • the reflector 120 is arranged inclined with respect to the horizontal plane (indicated by an auxiliary line 130).
  • the reflector 120 is arranged inclined with respect to the horizontal plane 130 with an angle of about 30° DEG.
  • the reflector 120 may be arranged with an angle between 20° and 60° DEG, more preferably between 30° and 50° DEG.
  • the area to be illuminated by the lighting device 100 can be adjusted.
  • the lighting device 100 distributes light perpendicular to the surface to be illuminated with an angle 135 greater than 60° DEG.
  • light can be distributed in a direction perpendicular to the surface to be illuminated with an angle preferably greater than 70° DEG and more preferably greater than 80° DEG, and most preferably, the light is distributed with an angle 85° DEG.
  • this angle is measured from a horizontal plane 130 downwards.
  • the angle of the light distribution perpendicular to the surface to be illuminated can be adjusted by means of the inclined arrangement of the reflector 120 and/or by means of the specific geometry of the reflector 120 ( e.g. by means of the specific heigth of the elevation) and/or by further optical means like a baffle as described in the following,
  • the lighting device 100 is adapted to be mounted at a height of about 0.95 m.
  • the lighting device 100 can be mounted at a guard rail (not shown) provided at a middle strip of a highway.
  • the lighting device 100 is preferably mounted at a height lower than the height of a driver of a vehicle, such that the driver is not dazzled by any light laterally emitted by the lighting device 100.
  • the lighting device 100 can further comprise a baffle 140 preferably arranged and at least partially surrounding the light source in the horizontal plane 130 or even additionally above the light source.
  • Figure 2 is a schematic view of the reflector 120 shown in the lighting device 100 in figure 1 .
  • the reflector 120 comprises an upper reflection surface 150 having an essentially saddle-shape surface.
  • saddle-shape according to the present invention is to be understood as a structure having a kind of a wave form with a wave crest (i.e. provided by the elevation) positioned at the main axis 160 and two laterally arranged wave troughs ( i.e. provided by indentations), wherein the wave crest and the wave troughs convert together, preferably at a central section 170 of the reflection surface 150, thereby providing a commonly known saddle-shape surface.
  • Figure 3 is a schematical top view of the reflector 120.
  • the reflection surface 150 has a shape corresponding to a sector of a circle having a center point in the center section 170, wherein in the shown preferred embodiment, the sector of a circle has an interior angle of about 190° DEG (indicated by the angle 180).
  • this interior angle is between 90° and 220° DEG, more preferably between 150° and 200° DEG, and even more preferably between 170° and 190° DEG.
  • the maximum width i.e. the maximum angel
  • the reflection surface 150 is preferably mirror symmetrical with respect to the main axis 160 of the reflection surface 150.
  • the minima i.e. the indentations
  • auxiliary lines 190 the minima are highlighted by auxiliary lines 190.
  • the two minima are provided at an angle of about +/- 80° DEG with respect to the main axis 160 of the reflection surface 150.
  • a light source is arranged above the central section 170 of the reflection surface 150, light is essentially distributed between both minima, thus providing in the preferred embodiment a light distribution in a direction parallel to a surface to be illuminated and perpendicular to the main axis 160 of the reflection surface 150 with an angle of about 160° DEG.
  • the minima can be provided at an angle between +/- 50° and +/- 90° DEG, preferably between +/- 60° and +/- 85° DEG, and more preferably between +/- 70° and +/- 80° DEG with respect to the main axis 160 of the reflection surface.
  • a wide light distribution can be achieved, preferably with an angle greater than +/- 50° DEG, preferably greater than +/- 70° DEG, and even more preferably greater than +/- 75° DEG.
  • Figure 4 is a side view of the reflector 120 as shown in figures 2 and 3 .
  • the reflection surface 150 does not comprise any jump discontinuities.
  • the outer circumference of the reflection surface 150 runs downwards to the shown minima and runs subsequently upwards to the front-tip 210 of the reflection surface 150.
  • the reflection surface 150 is mirror symmetrical with respect to the main axis 160, the circumference at the not shown other side is equally provided.
  • Figure 5 is a cross-section view along the main axis 160 of the reflection surface 150.
  • the main axis 160 is provided by a flat curve slightly directed downwardly from the rear edge 200 to a minima and then slightly directed upwardly to the front-tip 210.
  • Figure 6 is a schematical top view of the reflector 120, wherein above the center section 170 of the reflection surface 150, a light module 220 comprising a high brightness light emitting diode is arranged.
  • the light module 220 is preferably a light source having only a directional light emitting light essentially only in the direction to the reflection surface 150 of the reflector 120.
  • a high brightness light emitting diode preferred, however, also light emitting diode arrays/clusters and/or chip on board light emitting diode arrangements can be used depending on the specific application.
  • As an alternative or in addition to the arrangement of the light module 220 above the center section i.e.
  • each light source emits light to a predetermined area of the reflection surface 150 (e.g. one light source is arranged slightly left of the main axis 160 and a further light source is arranged slightly right of the main axis 160) such that the emitted light of each light sources is directed and assinged to a half of the mirror symmetrical shaped reflection surface 150.
  • the above shown embodiment is a preferred embodiment, but that, however, also different shapes of the reflection surface can be used, as long as the shape of the reflection surface is essentially saddle-shaped.
  • the specific use of a lighting device may require, that the reflection surface has to be provided with different gradients, thereby adjusting the emitting light cone.
  • the reflection surface may be provided by discrete surface areas, as long as the transitions between these areas provide an essentially uniform distribution of the light.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Claims (15)

  1. Beleuchtungsvorrichtung (100) zum Beleuchten von Straßen oder Wegen, umfassend:
    - mindestens eine Lichtquelle (220), umfassend mindestens eine Leuchtdiode;
    - mindestens einen Reflektor (120), umfassend eine im Wesentlichen sattelförmige Reflexionsoberfläche (150);
    wobei die Lichtquelle (220) derart angeordnet ist, dass mindestens ein Teil des emittierten Lichts auf die Reflexionsoberfläche (150) des Reflektors (120) gerichtet ist; und wobei das Licht von der Reflexionsoberfläche (150) derart reflektiert wird, dass eine breite Lichtverteilung der Beleuchtungsvorrichtung (100) mindestens in einer Richtung parallel zu einer zu beleuchtenden Oberfläche und senkrecht zu einer Hauptachse (160) der Reflexionsoberfläche (150) bereitgestellt wird, wobei die Reflexionsoberfläche (150) des Reflektors (120) mindestens zwei Minima (190) umfasst, die in einem Winkel zwischen +/-50° und +/-90° Grad in Bezug auf die Hauptachse (160) der Reflexionsoberfläche (150) bereitgestellt werden.
  2. Beleuchtungsvorrichtung (100) nach Anspruch 1, wobei die Reflexionsoberfläche (150) spiegelsymmetrisch in Bezug auf ihre Hauptachse (160) ist.
  3. Beleuchtungsvorrichtung (100) nach einem der vorstehenden Ansprüche, wobei die Reflexionsoberfläche (150) in Draufsicht eine einem Kreissektor entsprechende Form aufweist, vorzugsweise mit einem Innenwinkel zwischen 90° und 220° Grad, mehr bevorzugt zwischen 150° und 200° Grad und noch mehr bevorzugt zwischen 170° und 190° Grad.
  4. Beleuchtungsvorrichtung (100) nach einem der vorstehenden Ansprüche, wobei die mindestens zwei Minima (190) in einem Winkel zwischen +/-60° und +/-85° Grad und vorzugsweise zwischen +/-70° und +/-80° Grad in Bezug auf die Hauptachse (160) der Reflexionsoberfläche (150) bereitgestellt werden.
  5. Beleuchtungsvorrichtung (100) nach einem der vorstehenden Ansprüche, wobei die Reflexionsoberfläche (150) keine Sprungstellen umfasst.
  6. Beleuchtungsvorrichtung (100) nach einem der vorstehenden Ansprüche, wobei der Reflektor (120) derart gestaltet und angeordnet ist, dass das Licht in Draufsicht mit einem Winkel größer als +/-50° Grad, bevorzugt größer als +/-70° Grad und noch mehr bevorzugt größer als +/-75° Grad in Bezug auf die Hauptachse (160) der Reflexionsoberfläche (150) verteilt wird.
  7. Beleuchtungsvorrichtung (100) nach einem der vorstehenden Ansprüche, wobei der Reflektor (120) derart gestaltet ist, dass das Licht senkrecht zu der zu beleuchtenden Oberfläche mit einem Winkel größer als 60° Grad, bevorzugt größer als 70° Grad und mehr bevorzugt größer als 80° Grad verteilt wird und das Licht am meisten bevorzugt mit einem Winkel von etwa 85° Grad verteilt wird.
  8. Beleuchtungsvorrichtung (100) nach einem der vorstehenden Ansprüche, wobei angrenzend an den Reflektor (120) mindestens eine Blende (140) die Lichtquelle vorzugsweise in einer horizontalen Ebene teilweise umgebend angeordnet ist, wobei die mindestens eine Blende (140) vorzugsweise eine nach innen gerichtete Reflexionsoberfläche zum Umlenken von Licht zu der Reflexionsoberfläche (150) des Reflektors (120) umfasst.
  9. Beleuchtungsvorrichtung (100) nach einem der vorstehenden Ansprüche, wobei die Beleuchtungsvorrichtung (100) ein Gehäuse (110) umfasst, in dem der Reflektor (120) und die mindestens eine Lichtquelle (220) untergebracht sind.
  10. Beleuchtungsvorrichtung (100) nach einem der vorstehenden Ansprüche, wobei der Reflektor (120) mit seiner Hauptachse (160) in Bezug auf die horizontale Ebene (130) nach unten geneigt angeordnet ist, vorzugsweise mit einem Winkel zwischen 20° und 60° Grad, mehr bevorzugt zwischen 30° und 50° Grad und am meisten bevorzugt zwischen 35° und 45° Grad.
  11. Beleuchtungsvorrichtung (100) nach einem der vorstehenden Ansprüche, wobei die Lichtquelle (220) eine gerichtete Lichtquelle ist, die Licht im Wesentlichen nur in Richtung der Reflexionsoberfläche des Reflektors emittiert.
  12. Beleuchtungsvorrichtung (100) nach einem der vorstehenden Ansprüche, wobei die mindestens eine Lichtquelle (220) oberhalb der Hauptachse (160) der Reflexionsoberfläche (150), vorzugsweise in der Mitte eines Kreissektors, angeordnet ist.
  13. Beleuchtungsvorrichtung (100) nach einem der vorstehenden Ansprüche, wobei die Beleuchtungsvorrichtung (100) mindestens zwei Lichtquellen umfasst, die in Bezug auf die Hauptachse (160) der Reflexionsoberfläche (150) derart versetzt angeordnet sind, dass jede Lichtquelle Licht auf einen vorbestimmten Bereich der Reflexionsoberfläche (150) emittiert.
  14. Beleuchtungsvorrichtung (100) nach einem der vorstehenden Ansprüche, wobei die Lichtquelle (220) eine Leuchtdiode mit hoher Helligkeit, ein Leuchtdioden-Array/-Cluster und/oder eine Chip-on-Board-Leuchtdiodenanordnung umfasst.
  15. Beleuchtungssystem zum Beleuchten von Straßen oder Wegen, umfassend eine Beleuchtungsvorrichtung (100) nach einem der Ansprüche 1 bis 14, wobei die Beleuchtungsvorrichtung (100) in einer Höhe von weniger als 2,0 m, vorzugsweise zwischen 1,5 und 0,5 m, mehr bevorzugt zwischen 1,0 und 0,7 m und am meisten bevorzugt zwischen 0,95 und 0,80 m montiert ist.
EP14368005.6A 2014-01-10 2014-01-10 Beleuchtungsvorrichtung zur Beleuchtung von Straßen oder Wegen Active EP2894392B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP14368005.6A EP2894392B1 (de) 2014-01-10 2014-01-10 Beleuchtungsvorrichtung zur Beleuchtung von Straßen oder Wegen
PCT/EP2015/050247 WO2015104327A1 (en) 2014-01-10 2015-01-08 Lighting device for illumination streets, roads or paths
CN201580004017.7A CN105992906B (zh) 2014-01-10 2015-01-08 用于照亮街道、公路或小径的照明装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14368005.6A EP2894392B1 (de) 2014-01-10 2014-01-10 Beleuchtungsvorrichtung zur Beleuchtung von Straßen oder Wegen

Publications (2)

Publication Number Publication Date
EP2894392A1 EP2894392A1 (de) 2015-07-15
EP2894392B1 true EP2894392B1 (de) 2021-06-09

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EP14368005.6A Active EP2894392B1 (de) 2014-01-10 2014-01-10 Beleuchtungsvorrichtung zur Beleuchtung von Straßen oder Wegen

Country Status (3)

Country Link
EP (1) EP2894392B1 (de)
CN (1) CN105992906B (de)
WO (1) WO2015104327A1 (de)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7568821B2 (en) * 2005-03-03 2009-08-04 Dialight Corporation Beacon light with reflector and light-emitting diodes
FR2882807B1 (fr) 2005-03-04 2007-11-02 Thorn Europhane Sa Procede et dispositif d'eclairage de voies de circulation
CN101021669A (zh) * 2006-02-13 2007-08-22 耿忠 全视场成像与显示方法与系统
EP2375130B1 (de) * 2010-04-09 2014-07-02 Thorn Europhane S.A. Beleuchtungsmodul für Tunnel-, Außerorts- und Innerortstraßenlicht
WO2013136217A1 (en) * 2012-03-13 2013-09-19 Koninklijke Philips N.V. A lighting device, a lighting luminaire and a lighting system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
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Also Published As

Publication number Publication date
CN105992906A (zh) 2016-10-05
EP2894392A1 (de) 2015-07-15
CN105992906B (zh) 2019-09-10
WO2015104327A1 (en) 2015-07-16

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