EP2947383B1 - Beleuchtungseinrichtung zur Beleuchtung von Strassen oder Wegen. - Google Patents

Beleuchtungseinrichtung zur Beleuchtung von Strassen oder Wegen. Download PDF

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Publication number
EP2947383B1
EP2947383B1 EP14290085.1A EP14290085A EP2947383B1 EP 2947383 B1 EP2947383 B1 EP 2947383B1 EP 14290085 A EP14290085 A EP 14290085A EP 2947383 B1 EP2947383 B1 EP 2947383B1
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EP
European Patent Office
Prior art keywords
lighting device
light
reflector
light source
translucent enclosure
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.)
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Application number
EP14290085.1A
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English (en)
French (fr)
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EP2947383A1 (de
Inventor
Florian Rocard
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
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Publication date
Application filed by ZG Lighting France SAS filed Critical ZG Lighting France SAS
Priority to EP14290085.1A priority Critical patent/EP2947383B1/de
Publication of EP2947383A1 publication Critical patent/EP2947383A1/de
Application granted granted Critical
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    • 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
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to a lighting device for illuminating streets, roads or paths comprising at least one light source, one reflector for reflecting light emitted by the at least one light source and a housing comprising at least one translucent enclosure part.
  • street lightings having a horizontal translucent enclosure part (i.e . a flat translucent enclosure part at the bottom side of the street lighting through which light is directed) and street lightings having a curved translucent enclosure part (i.e. an arc-shaped or semi-circular shaped translucent enclosure part at the bottom side of the street lighting through which light is directed).
  • Street lightings having a horizontal translucent enclosure part have the advantage that, due to the geometry and the resulting light guiding, no light is directed in an upward direction (i.e. the "Upper Light Output Ration " of such street lightings is almost zero). Notably, such upwardly directed light is wasted and may at the worst disturb local residents.
  • the surface area which can be illuminated by such a street lighting is comparatively small, and thus, the distance/spacing between two neighboring street lightings having a horizontal translucent enclosure part has to be correspondingly small.
  • Street lightings having a curved translucent enclosure part can illuminate a comparatively large surface area, and thus, the distance/spacing between two neighboring street lightings having a curved translucent enclosure part can be correspondingly wide.
  • street lightings have the disadvantage that a certain amount of the light is directed in an upward direction, and is thus wasted and may at the worst disturb local residents.
  • WO 2012/059 790 A1 discloses a projector for street lighting, which comprises a case that houses a plurality of LEDs and a cap.
  • the cap comprises a plurality of reflective surfaces for reflecting at least a part of the emission of the LEDs for illuminating areas that are close to the projector.
  • the LEDs are mounted on boards of high thermal conductivity in the proximity of opposed longitudinal edges of the case. Furthermore, a front opening of the cap is covered with a substantially flat plate of an optically transparent material.
  • WO 2013/131858 A1 discloses a lighting device for road lighting, which comprises a channel-shaped housing having two ends with a main axis of the housing extending between the two ends.
  • the lighting device further comprises a pair of mounting fixtures for mounting a pair of LEDs within the housing.
  • the LEDs radiate light radiation in opposite directions along the main axis of the housing.
  • the lighting device comprises a pair of reflectors each facing one of the mounting fixtures to receive the light radiation from the LEDs along the main axis and to reflect it to the outside of the housing.
  • one of the objects of the present invention is to provide a street lighting combining the advantages of the above-described known street lightings.
  • a lighting device for illuminating streets, roads or paths comprising: at least one light source; at least one reflector for reflecting the light emitted by the at least one light source; a housing comprising at least one curved translucent enclosure part, wherein the light source is arranged at a peripheral position between the reflector and the translucent enclosure part; and wherein the at least one light source is oriented towards the reflector such that the light is reflected by the reflector in a direction to the translucent enclosure.
  • the reflector surface of the reflector does not comprise any jump discontinuities.
  • the light sources of the lighting device are arranged at/onto side wall sections of the lighting device. The light sources are in thermal contact with the side wall sections of the lighting device.
  • the light source is usually positioned between a reflector and a translucent enclosure part (e.g. a horizontal flat enclosure or a curved enclosure part) at a central/middle position with respect to the reflector.
  • the light source according to the present invention is arranged at a peripheral position between the reflector and the translucent enclosure part (e.g. at a sidewall of the housing).
  • the at least one light source is oriented towards the reflector resulting in that almost all of the light emitted by the at least one light source is directed to the reflector and subsequently directed through the translucent enclosure part only in a direction to the surface to be illuminated.
  • a structure is provided with which a surface is illuminated by means of indirect light, wherein almost all light can be directed to the surface to be illuminated by means of the reflector such that no or almost any light is directed in a direction upward.
  • the reflector geometry the light distribution can be adjusted in such a way that a comparatively wide surface area can be illuminated.
  • the present invention provides a lighting device having a light distribution as known from the street lightings with curved enclosure parts (i.e. also the spacing between two neighboring street lightings can be correspondingly wide), wherein no, or hardly any, light is directed in a direction upward). Moreover, a homogeneous light distribution can be provided.
  • the lighting device comprises two light sources arranged at peripheral positions, each between a corresponding reflector and a corresponding translucent enclosure part.
  • the light sources, the reflectors and the translucent enclosures are arranged opposite to each other.
  • the light sources, the reflectors and the translucent enclosures are arranged mirror symmetrical at peripheral positions.
  • the lighting device comprises at least three, more preferably at least four light sources arranged equidistantly at respective peripheral positions, wherein each light source is arranged between a reflector and a translucent enclosure.
  • the at least four light sources are arranged in a cruciform such that a relatively large area can be illuminated. Such a light distribution may be desired for illuminating paths, for example, in a park.
  • the distance between a corresponding reflector and translucent enclosure part decreases.
  • the distance between the reflector and the translucent enclosure part decreases with increasing distance from the light source(s).
  • the reflectors are provided as one integral part.
  • the reflectors can be provided by a plastic material onto which a reflecting surface (e.g. a metallic layer) has been applied.
  • a reflecting surface e.g. a metallic layer
  • the translucent enclosure parts are provided as one integral part. Thereby, the assembly of the lighting device can be simplified.
  • the translucent enclosure parts comprise optical means, like lenses, covers, etc.
  • optical means like lenses, covers, etc.
  • the specific light distribution and direction of the light emitted by the lighting device can be further adapted to the respective mounting location (e.g . mounting height, orientation of the lighting device, mounting angle of the lighting device etc.).
  • the light sources of the lighting device are arranged at a circumferential sidewall of the lighting device.
  • the light sources are in thermal contact with the sidewall(s) of the lighting device, which are preferably provided by a heat conducting metallic material such that the heat of the light source can be lead away from the light sources.
  • the translucent enclosure part does not extend beyond the sidewall sections of the lighting device in a direction towards the surface to be illuminated. Thereby, it can be further ensured that no light may be emitted in an upward direction.
  • the light sources are provided by a directional light source emitting light essentially only in one direction, i.e. towards the reflection surface of the reflector. Thereby, it can be ensured that the light emitted by the light source is completely directed towards the reflector and that no light is unintentionally directed in another direction.
  • the light source comprises a high brightness light emitting diode, a light emitting diode array/cluster and/or a chip on board light in diode arrangement.
  • Figure 1 shows a schematic side view of a first embodiment of a lighting device 10 for illuminating streets, roads or paths.
  • the lighting device 10 comprises a housing 20 having a translucent enclosure part 25 at a bottom side which is oriented to a surface to be illuminated.
  • a light source 30 is arranged at a peripheral position (here at an outer side wall of the housing 20).
  • the light source 30 is arranged onto a metallic side wall section 40 of the housing 20, wherein the light source 30 and the metallic side wall section 40 are in thermal contact with each other such that the heat from the light source 30 is lead away by the metallic side wall section 40.
  • the light source 30 of the shown preferred embodiment is a directional light source (e.g. a light emitting diode array/cluster or a chip on board light emitting diode arrangement).
  • the lighting device 10 further comprises a reflector 50 preferably provided by a plastic material onto which a metallic surface was applied.
  • the translucent enclosure part 25 further comprises optical lenses (not shown) such that the specific light distribution of the lighting device 10 is further adapted. As can further be taken from figure 1 , the translucent enclosure part 25 does not extend beyond the side wall section 40 of the lighting device 10 in a direction toward a surface to be illuminated. Thereby, it can be further ensured that no light is emitted in an upward direction.
  • Figure 2 shows a second embodiment of a lighting device 100 for illuminating streets, roads or paths.
  • the lighting device 100 comprises a housing 200 in which two light sources 300, 300' (e.g . two light emitting diode arrays) are arranged opposite to each other, wherein each light source 300, 300' is arranged on a side wall section 400, 400' ( e.g. a circumferential side wall of the housing 200). Moreover, each light source 300, 300' is arranged between a corresponding translucent enclosure part 250, 250' and a respective reflector 500, 500'. In the shown preferred embodiment, the reflectors 500, 500' and the translucent enclosure parts 250, 250' are each provided as an integral part. As can be further taken from figure 2 , the lighting device 100 is basically mirror symmetrical with respect to an axis 600. According to the shown preferred embodiment of figure 2 , the other contours of the translucent enclosure parts 250, 250' and the reflectors 500, 500', when seen in a side view, is basically propeller-like.
  • the other contours of the translucent enclosure parts 250, 250' and the reflectors 500, 500' when seen in
  • each light source 300, 300' With increasing distance from each light source 300, 300' in a direction to the axis 600, the distance between the reflectors 500, 500' and the translucent enclosure parts 250, 250' decreases. Thereby, the light emitted by each light source 300, 300' is directed to the respective reflectors 500, 500' such that almost the entire light of each light source 300, 300' is directed to the respective reflector 500, 500' which in turn reflects the light in a direction to the respective translucent enclosure parts 250, 250'.
  • a surface area to be illuminated is not directly illuminated by the light sources 300, 300', but only via the reflectors 500, 500' ( i.e. only in an indirect manner). Thereby, no upwardly directed light is emitted by the lighting device 100.
  • the above-described lighting devices 10, 100 provide a light distribution having no, or hardly any, light directed in an upward direction, wherein nevertheless a comparatively large surface can be illuminated such that the spacing between two neighboring lighting devices may be correspondingly wide.
  • a lighting device having a horizontal flat enclosure and a lighting device having a curved enclosure can be merged, but without the above-mentioned disadvantages.

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

Claims (12)

  1. Beleuchtungsvorrichtung (10, 100) zum Beleuchten von Straßen, Landstraßen oder Wegen, Folgendes umfassend:
    - mindestens eine Lichtquelle (30, 300, 300'),
    mindestens einen Reflektor (50, 500, 500') zum Reflektieren von Licht, das von der mindestens einen Lichtquelle (30, 300, 300') ausgestrahlt wird,
    - ein Gehäuse (20, 200), das mindestens einen gewölbten lichtdurchlässigen Einfassungsteil (25, 250, 250') umfasst, wobei die Lichtquelle (30, 300, 300') an einer Außenrandposition zwischen dem Reflektor (50, 500, 500') und dem lichtdurchlässigen Einfassungsteil (25, 250, 250') angeordnet ist,
    und wobei die mindestens eine Lichtquelle (30, 300, 300') derart hin zum Reflektor (50, 500, 500') ausgerichtet ist, dass das Licht von dem Reflektor (50, 500, 500') in eine Richtung zum lichtdurchlässigen Einfassungsteil (25, 250, 250') reflektiert wird, wobei
    die Reflektoroberfläche des Reflektors (50, 500, 500') keine Sprungstellen umfasst, wobei die Lichtquellen (30, 300, 300') an Seitenwandabschnitten (40, 400, 400') der Beleuchtungsvorrichtung (10, 100) angeordnet sind und wobei die Lichtquellen (30, 300, 300') in thermischem Kontakt mit den Seitenwandabschnitten (40, 400, 400') stehen.
  2. Beleuchtungsvorrichtung (10, 100) nach Anspruch 1, wobei die Beleuchtungsvorrichtung (10, 100) zwei Lichtquellen (30, 300, 300') umfasst, die jeweils zwischen einem Reflektor (50, 500, 500') und einem lichtdurchlässigen Einfassungsteil (25, 250, 250') an Außenrandpositionen in dem Gehäuse (20, 200) angeordnet sind.
  3. Beleuchtungsvorrichtung (10, 100) nach Anspruch 2, wobei die Lichtquellen (30, 300, 300'), die Reflektoren (50, 500, 500') und die lichtdurchlässigen Einfassungsteile (25, 250, 250') einander gegenüber angeordnet sind.
  4. Beleuchtungsvorrichtung (10, 100) nach Anspruch 2 oder 3, wobei die Lichtquellen (30, 300, 300'), die Reflektoren (50, 500, 500') und die lichtdurchlässigen Einfassungsteile (25, 250, 250') im Verhältnis zu einer Symmetrieachse (600) spiegelsymmetrisch angeordnet sind.
  5. Beleuchtungsvorrichtung (10, 100) nach Anspruch 1, wobei die Beleuchtungsvorrichtung (10, 100) mindestens vier Lichtquellen (30, 300, 300') umfasst, die im gleichen Abstand an Außenrandpositionen in dem Gehäuse (20, 200) angeordnet sind, wobei jede Lichtquelle (30, 300, 300') zwischen einem Reflektor (50, 500, 500') und einem lichtdurchlässigen Einfassungsteil (25, 250, 250') angeordnet ist.
  6. Beleuchtungsvorrichtung (10, 100) nach einem der Ansprüche 2 bis 4, wobei mit zunehmender Entfernung von einer Lichtquelle (30, 300, 300') in einer Richtung hin zur anderen Lichtquelle (30, 300, 300') der Abstand zwischen einem entsprechenden Reflektor (50, 500, 500') und einem entsprechenden lichtdurchlässigen Einfassungsteil (25, 250, 250') abnimmt.
  7. Beleuchtungsvorrichtung (10, 100) nach einem der vorhergehenden Ansprüche, wobei die Reflektoren (50, 500, 500') als ein integraler Teil bereitgestellt sind.
  8. Beleuchtungsvorrichtung (10, 100) nach einem der vorhergehenden Ansprüche, wobei die lichtdurchlässigen Einfassungsteile (25, 250, 250') als ein integraler Teil bereitgestellt sind.
  9. Beleuchtungsvorrichtung (10, 100) nach einem der vorhergehenden Ansprüche, wobei die lichtdurchlässigen Einfassungsteile (25, 250, 250') optische Mittel wie Linsen, Abdeckungen usw. umfassen.
  10. Beleuchtungsvorrichtung (10, 100) nach einem der vorhergehenden Ansprüche, wobei sich die lichtdurchlässigen Einfassungsteile (25, 250, 250') in eine Richtung hin zu der zu beleuchtenden Fläche nicht über die Seitenwandabschnitte (40, 400, 400') der Beleuchtungsvorrichtung (10, 100) hinaus erstrecken.
  11. Beleuchtungsvorrichtung (10, 100) nach einem der vorhergehenden Ansprüche, wobei die Lichtquelle (30, 300, 300') eine gerichtete Lichtquelle (30, 300, 300') ist, die Licht im Wesentlichen nur in Richtung der Reflexionsfläche des Reflektors (50, 500, 500') ausstrahlt.
  12. Beleuchtungsvorrichtung (10, 100) nach einem der vorhergehenden Ansprüche, wobei die Lichtquelle (30, 300, 300') eine Leuchtdiode mit großer Helligkeit, ein Leuchtdiodenfeld / eine Leuchtdiodengruppe und/oder eine Chip-On-Board-Leuchtdiodenanordnung umfasst.
EP14290085.1A 2014-03-31 2014-03-31 Beleuchtungseinrichtung zur Beleuchtung von Strassen oder Wegen. Active EP2947383B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14290085.1A EP2947383B1 (de) 2014-03-31 2014-03-31 Beleuchtungseinrichtung zur Beleuchtung von Strassen oder Wegen.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14290085.1A EP2947383B1 (de) 2014-03-31 2014-03-31 Beleuchtungseinrichtung zur Beleuchtung von Strassen oder Wegen.

Publications (2)

Publication Number Publication Date
EP2947383A1 EP2947383A1 (de) 2015-11-25
EP2947383B1 true EP2947383B1 (de) 2020-02-12

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EP14290085.1A Active EP2947383B1 (de) 2014-03-31 2014-03-31 Beleuchtungseinrichtung zur Beleuchtung von Strassen oder Wegen.

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Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI308627B (en) * 2006-12-05 2009-04-11 Ind Tech Res Inst Illumination device of flexible lighting angle
EP2376830B1 (de) * 2008-12-15 2018-09-05 Arianna S.R.L. Beleuchtungsvorrichtung
WO2012059790A1 (en) * 2010-11-05 2012-05-10 Nanto Srl Projector with solid state light sources for street lighting or the like
US9765945B2 (en) * 2012-03-07 2017-09-19 Osram Gmbh Lighting device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
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