EP2894395A1 - Beleuchtungsvorrichtung zur Beleuchtung von Tunneln, Unterführungen oder Fußgängertunneln - Google Patents

Beleuchtungsvorrichtung zur Beleuchtung von Tunneln, Unterführungen oder Fußgängertunneln Download PDF

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Publication number
EP2894395A1
EP2894395A1 EP14368007.2A EP14368007A EP2894395A1 EP 2894395 A1 EP2894395 A1 EP 2894395A1 EP 14368007 A EP14368007 A EP 14368007A EP 2894395 A1 EP2894395 A1 EP 2894395A1
Authority
EP
European Patent Office
Prior art keywords
reflection surface
lighting device
light
reflector
lighting
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.)
Granted
Application number
EP14368007.2A
Other languages
English (en)
French (fr)
Other versions
EP2894395B1 (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
Original Assignee
Thorn Europhane SA
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 Thorn Europhane SA filed Critical Thorn Europhane SA
Priority to EP14368007.2A priority Critical patent/EP2894395B1/de
Priority to PCT/EP2015/050254 priority patent/WO2015104332A1/en
Priority to CN201580004069.4A priority patent/CN105899869B/zh
Publication of EP2894395A1 publication Critical patent/EP2894395A1/de
Application granted granted Critical
Publication of EP2894395B1 publication Critical patent/EP2894395B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F21W2131/101—Outdoor lighting of tunnels or the like, e.g. under bridges

Definitions

  • the present invention relates to a lighting device for illuminating tunnels, underpasses or subways, as well as to a corresponding lighting system for illuminating tunnels, underpasses or subways.
  • a lighting device for illuminating tunnels, underpasses or subways comprising: at least a first lighting arrangement for illuminating a lower section of a tunnel, underpass or subway and a second lighting arrangement for illuminating an upper section of a tunnel, underpass or subway, wherein at least one of the lighting arrangements comprises: 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 such that at least a part of the emitted light 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.
  • 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.
  • the present invention provides a lighting device with which in principle the entire cross-section of a tunnel can be illuminated with only one lighting device.
  • both the first lighting arrangement and the second lighting arrangement comprise: 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 such that at least a part of the emitted light is directed to the reflection surface of the reflector.
  • both the upper portion and the lower portion of a tunnel can be illuminated with a wide and homogeneous light distribution.
  • 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 direction 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 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.
  • 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 of a vehicle driver can be 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 tunnels, underpasses or subways comprising a lighting device as explained above.
  • Figure 1 is a schematic view of a first embodiment of a lighting device 100 comprising a first lighting arrangement 101 and a second lighting arrangement 102, wherein the first lighting arrangement 101 is provided to illuminate a lower section of a tunnel and the second lighting arrangement 102 is provided to illuminate an upper section of a tunnel.
  • the lighting arrangements 101, 102 respectively comprise a reflector 120,125 and an associated light source module 220, 225.
  • a baffle 140 is arranged preventing that light is emitted dazzling a vehicle driver.
  • the lighting arrangements 101, 102 of the lighting device 100 are oriented to the same side sharing one optical enclosure 104 ( i.e . a transparent housing part) which can be provided by an integral part or by two separate parts.
  • the two lighting arrangements 101, 102 have, in principle, a similar structure.
  • FIG 2 is a schematic view of a second embodiment of a lighting device 100' comprising a first lighting arrangement 101' and a second lighting arrangement 102'.
  • the first lighting arrangement 101' is provided to illuminate a lower section of a tunnel and the second lighting arrangement 102' is provided to illuminate an upper section of a tunnel.
  • the lighting arrangements 101', 102' respectively comprise a reflector 120', 125' and an associated light source module 220, 225.
  • the first and second lighting arrangements 101', 102'of the lighting device 100' shown in figure 2 are not oriented to the same side, but to opposite sides. However, as the case maybe, both arrangements can be oriented as desired by the respective illumination requirements.
  • no baffle is required in order to prevent a dazzling of a vehicle driver.
  • FIGS 9 and 10 the illumination distribution of the different orientation of the second lighting arrangements 102, 102' are illustrated.
  • the first lighting arrangements 101, 101' of the lighting devices 100, 100' distribute light vertically (i.e. perpendicular) to the surface to be illuminated ( i.e. on the road) with an angle 135 greater than 60° DEG.
  • light can be distributed in such direction 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 of 85° DEG.
  • this angle is measured from a horizontal plane 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 height of the elevation) and/or by further optical means like a baffle as described in the following.
  • the lighting devices 100, 100' are adapted to be mounted at a height of about 0.95 m.
  • the lighting devices 100, 100' are 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 devices 100, 100'.
  • the lighting devices 100, 100' can comprise one or more of the baffles 140, preferably arranged at least partially surrounding the light source.
  • the frame of the lighting devices 100, 100' can be provided as a heat sink (e.g. by providing the frame from a metallic material). Moreover, if needed, further heat sinks can be provided within the housing of the lighting devices 100, 100'.
  • Figure 3 shows a schematic view of a reflector used in the preferred embodiments of the invention, wherein exemplarily the reflector 120 arranged in the first lighting arrangement 101 of the lighting device 100 is explained.
  • the first lighting arrangements 101, 101' provided to illuminate a lower section of a tunnel comprise such a reflector 120, wherein it is preferred that also the second lighting arrangements 102, 102' comprise such a saddle-shaped reflector (but not necessarily identical with the saddle-shaped reflector 120).
  • 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 Figure 4 is a schematic 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). Preferably, 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 angle
  • 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 and homogeneous 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 5 is a side view of the reflector 120 as shown in figures 4 .
  • the reflection surface 150 does not comprise any jump discontinuities.
  • the outer circumference of the reflection surface 150 runs downwards to the shown minimum and runs subsequently upwards to the front-tip 210 of the reflection surface 150. Since in the preferred embodiment, 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 6 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 minimum and then slightly directed upwardly to the front-tip 210.
  • Figure 7 is a schematic 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 radiator having a spherical light emission can be used.
  • the use of 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.
  • 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 assigned to a half of the mirror symmetrical shaped reflection surface 150.
  • Figure 8 illustrates a light distribution obtained by a using the reflector 120.
  • Figure 9 is a schematic view of the light distribution provided by the lighting device 100. As can be taken from figure 9 , the lighting device 100 having two lighting arrangements 101, 102 oriented in the same direction can be preferably used in case the tunnel has a curved upper section.
  • Figure 10 is a schematic view of the light distribution provided by the lighting device 100'. As can be taken from figure 10 , the lighting device 100' having two lighting arrangements 101, 102 oriented in opposite directions can be preferably used in case the tunnel has a planar upper section.
  • the above shown embodiments are preferred embodiments, 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.
EP14368007.2A 2014-01-10 2014-01-10 Beleuchtungsvorrichtung zur Beleuchtung von Tunneln, Unterführungen oder Fußgängertunneln Active EP2894395B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP14368007.2A EP2894395B1 (de) 2014-01-10 2014-01-10 Beleuchtungsvorrichtung zur Beleuchtung von Tunneln, Unterführungen oder Fußgängertunneln
PCT/EP2015/050254 WO2015104332A1 (en) 2014-01-10 2015-01-08 Lighting device for illumination tunnels, underpasses or subways
CN201580004069.4A CN105899869B (zh) 2014-01-10 2015-01-08 用于照亮隧道、地下通道或者地铁的照明设备

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14368007.2A EP2894395B1 (de) 2014-01-10 2014-01-10 Beleuchtungsvorrichtung zur Beleuchtung von Tunneln, Unterführungen oder Fußgängertunneln

Publications (2)

Publication Number Publication Date
EP2894395A1 true EP2894395A1 (de) 2015-07-15
EP2894395B1 EP2894395B1 (de) 2021-04-07

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EP14368007.2A Active EP2894395B1 (de) 2014-01-10 2014-01-10 Beleuchtungsvorrichtung zur Beleuchtung von Tunneln, Unterführungen oder Fußgängertunneln

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EP (1) EP2894395B1 (de)
CN (1) CN105899869B (de)
WO (1) WO2015104332A1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2148129A1 (de) 2008-07-21 2010-01-27 Thorn Europhane S.A. System zur Beleuchtung eines Tunnels oder einer Unterführung
EP2375130A1 (de) * 2010-04-09 2011-10-12 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

Family Cites Families (6)

* 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
CN101021669A (zh) * 2006-02-13 2007-08-22 耿忠 全视场成像与显示方法与系统
DE102006016021A1 (de) * 2006-04-05 2007-10-11 Zumtobel Lighting Gmbh Reflektorleuchte
MX2011001685A (es) * 2008-08-14 2011-08-17 Cooper Technologies Co Dispositivos de led para la generacion de dispersion amplia de haz.
US9841162B2 (en) * 2009-05-18 2017-12-12 Cree, Inc. Lighting device with multiple-region reflector
CN102102854A (zh) * 2011-02-17 2011-06-22 毛有强 一种能提高亮度均匀度的高效反光器及灯具

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2148129A1 (de) 2008-07-21 2010-01-27 Thorn Europhane S.A. System zur Beleuchtung eines Tunnels oder einer Unterführung
EP2375130A1 (de) * 2010-04-09 2011-10-12 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

Also Published As

Publication number Publication date
CN105899869A (zh) 2016-08-24
EP2894395B1 (de) 2021-04-07
CN105899869B (zh) 2019-05-07
WO2015104332A1 (en) 2015-07-16

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