EP1953449B1 - Lighting fixture with LEDs, which is fixable to ceilings and to walls - Google Patents

Lighting fixture with LEDs, which is fixable to ceilings and to walls Download PDF

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Publication number
EP1953449B1
EP1953449B1 EP08425045A EP08425045A EP1953449B1 EP 1953449 B1 EP1953449 B1 EP 1953449B1 EP 08425045 A EP08425045 A EP 08425045A EP 08425045 A EP08425045 A EP 08425045A EP 1953449 B1 EP1953449 B1 EP 1953449B1
Authority
EP
European Patent Office
Prior art keywords
lighting fixture
reflector
light
segments
fixture
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.)
Not-in-force
Application number
EP08425045A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1953449A2 (en
EP1953449A3 (en
Inventor
Gian Pietro Beghelli
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.)
Beghelli SpA
Original Assignee
Beghelli SpA
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 Beghelli SpA filed Critical Beghelli SpA
Priority to PL08425045T priority Critical patent/PL1953449T3/pl
Publication of EP1953449A2 publication Critical patent/EP1953449A2/en
Publication of EP1953449A3 publication Critical patent/EP1953449A3/en
Application granted granted Critical
Publication of EP1953449B1 publication Critical patent/EP1953449B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • 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
    • F21S8/03—Lighting devices intended for fixed installation of surface-mounted type
    • F21S8/033—Lighting devices intended for fixed installation of surface-mounted type the surface being a wall or like vertical structure, e.g. building facade
    • 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
    • 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
    • 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

  • This invention relates to a high-performance lighting fixture with optimum light distribution which can be installed on the ceiling and on the wall.
  • the invention refers to a lighting apparatus, which uses power led light sources and which can be utilized for the simple lighting or for the emergency lighting, which includes at least one composite surface reflector, suitable to define an optics such as to assure the optimal distribution of the light, both in the case the fixture is wall installed, and in the case the fixture itself is ceiling installed.
  • a lighting apparatus of this type boasts an important content of lighting engineering and a remarkable aesthetic content.
  • a proper lighting has to guarantee, in the field of vision, high sufficiently and rationally distributed luminance to allow the perception of the important areas, as well as of the details, and minimise any form of dazzling.
  • the emergency lighting apparatus has to assure a sufficiently intense and concentrated luminous flux to make it possible to identify easily and quickly the way out, specially in case of danger.
  • Luminance is defined as the ratio between the intensity of a light source in a given direction, and its apparent surface seen from the same direction; its value depends on the illumination, the reflection characteristics of the surfaces and the directions of lighting and observation.
  • the luminance is extremely difficult to calculate so, in practice, in the design of a lighting fixture, normally they always refer to the illumination.
  • the illumination in a point of a surface is defined as the ratio between the luminous flux which affects an element of the surface around the point and the surface of the element itself; therefore, the illumination can be easily envisaged and measured (by means of a luxmeter or an illuminometer), so it can be conveniently and simply used to deal with technical issues, such as for example the design of a lighting fixture.
  • the performance of a lighting apparatus are usually assessed by assigning a given illumination on a work or use top, consisted, by convention, of a horizontal plane placed at a certain distance from the floor; when the light reaches such a work top directly from the light source (at least 90% of the luminous flux), it is said that there's direct illumination, while, instead, when the light reaches the work top after being reflected from the walls and/or ceiling of the premises for several times too (at least 90% of the luminous flux), it is said there's indirect lighting.
  • a lighting apparatus particularly an emergency lamp
  • Apparatus for the direct lighting are widely utilized for the artificial lighting of buildings for civilian and industrial use, both as a main source of light, and as an emergency or safety source.
  • Such lighting apparatus include usually a hollow body in which a light source, such as a fluorescent tube, can be accommodated, connecting it to terminals which allow the power supply; the body is closed by transparent protective screens associable in a removable way in order to always permit the access to the light source and the terminals.
  • a light source such as a fluorescent tube
  • the lighting apparatus of the known type in particular the emergency ones, currently have an illumination distribution on the work top not very uniform and substantially unhomogeneous, even in relation to the relative position assumed by an observer with respect to the light source; moreover, the illumination is relatively concentrated and little intense, so it is not possible, in practice, to obtain an acceptable compromise between the intensity of the luminous flux and the concentration of the beam, important parameters in case an emergency situation occurs in the civil and work environments and it is necessary to resort to the lighting of the same with substitutive fluorescent lamps.
  • the performance of lighting apparatus of the known type depend on the positioning of the light source used, and, thus, from the positioning of the apparatus itself; consequently, the design of a lighting apparatus, suitable to realize an optimal distribution of light in case the cited apparatus is wall installed, does not provide the same performance in case the same apparatus is ceiling installed, and vice versa, forcing the designer to realize at least two different optics to carry out the desired installations.
  • an aim of the present invention is to overcome the abovementioned disadvantages and, in particular, to realize a high-performance lighting fixture with optimum light distribution, which allows to achieve an illumination uniform and concentrated and intense enough at the same time, both in the case the fixture is ceiling installed and in the case such fixture is wall installed.
  • Another aim of the present invention is to create a high-performance lighting fixture with optimum light distribution, which is fixable to ceiling and to wall which allows to obtain, in any case, a desired illumination distribution and a considerable optics efficiency.
  • Another aim of the present invention is to realize a high-performance lighting fixture with optimum light distribution, which is fixable to ceiling and to wall, which, besides boasting an important illuminating-engineered content, as previously indicated, is strongly distinguished under the aesthetical point of view, both with the light source on and with the light source off.
  • the reflecting surface adopted in accordance with the present invention allows to illuminate very wide areas, assuring in any case a substantially uniform illumination on the work top, whether the lighting fixture is wall installed, or the same is wall installed; furthermore, it allows to obtain relatively concentrated light fluxes in a front direction of the diffusive screen.
  • the lighting fixture 10 utilizes as light sources, in particular, power LEDs 11, placed properly on at least one surface of each reflector 12 used in the fixture 10.
  • the considerable and optimal lighting performance of the fixture 10 are obtained through a composite surfaces reflectors 12, so as to define an optics which produces a photometric solid so called universal, suitable to produce a proper illumination by the fixture 10, similarly, for ceiling and wall installations thereof.
  • each reflector 12 of the lighting fixture 10 presents a composite surface, whose profile is obtained as follows.
  • each light source 11 whether punctiform or lambertian, placed on at least one of the surfaces of each reflector 12 and in particular consisted of at least one power LED, with the axis of maximum light intensity parallel to the plane of installation of the fixture 10 (wall or ceiling).
  • each reflector 12 (as shown in detail in figure 10 ) consists of at least three segments A, B, C straight line, joined at the vertexes D, E, in order to form a continuous interrupted line.
  • the polar charts of the optical system are obtained, both in the case the fixture 10 is wall installed ( figure 8 ) and ceiling installed ( figure 9 ), which disclose a total efficiency of the optics of about 87% for both the installations.
  • An iterative procedure realizes a configuration of the interrupted line, constituent the profile of each reflector 12, which produces a photometric solid sufficiently similar to the desired ideal solid.
  • Such a configuration consists, as said, on at least three segments A, B, C, which define:
  • the distance between the points V (end of the segment A opposed to D) and W (located at the same level of the point Z, end of the segment C opposed to E) of the vertical T is equal to about 24 mm and, more in general, is included between 23 mm and 24 mm, while the distance between points W and Z is approximately 67 mm and, more in general, is included between 65 mm and 70 mm.
  • a lighting fixture 10 which can be used, particularly, for emergency lighting, shaped as previously described, boasts an important content of lighting engineering and a remarkable aesthetic content.
  • one or more reflectors 12 each having a composite surface, conferred by the union of shaped interrupted surfaces, which allows to obtain the desired illumination distribution, similarly for wall installations and ceiling installations of the fixture 10, although in the absence of facilities specifically dedicated to obtain the distribution itself.
  • the distribution of the illumination is advantageously devoid of alternating zones of light and dark and/or of sudden illumination variations.
  • each reflector 12 is deeply marked out, both with the relative light source 11 (power LED) on and with the light source 11 off, since the reflections coming from the interrupted surfaces of the reflector 12 produce, through direct observation, a mosaic of miniaturized repeated images.
  • the lighting fixture 10, according to the present invention is particularly advantageous for the great uniformity and area of lighting which it allows to get; furthermore, the particular interrupted profile of the reflector 12 permits to get controlled photometric performance, both in the case the fixture 10 is wall installed, and in the case the fixture 10 is ceiling installed, and, thus, it also constitutes a reliable and versatile product for the emergency lighting.
  • the lighting fixture thus realized can be used similarly both for the punctual lighting of the environments, and for the emergency lighting, and it can be equally applied to walls or ceilings, with the orientation of the light beam both on the longitudinal plane and on the transversal one; such lighting fixture can also be planned for suspension or electrified bar installation, thanks to the high illumination level which can develop towards the ground also from considerable heights.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Finishing Walls (AREA)
EP08425045A 2007-02-01 2008-01-30 Lighting fixture with LEDs, which is fixable to ceilings and to walls Not-in-force EP1953449B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08425045T PL1953449T3 (pl) 2007-02-01 2008-01-30 Oświetleniowy element z elektroluminescencyjnymi diodami, który może być mocowany do sufitów i ścian

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000031A ITVI20070031A1 (it) 2007-02-01 2007-02-01 Apparecchio di illuminazione ad alte prestazioni ed ottimale distribuzione della luce installabile a soffitto e a parete

Publications (3)

Publication Number Publication Date
EP1953449A2 EP1953449A2 (en) 2008-08-06
EP1953449A3 EP1953449A3 (en) 2010-12-29
EP1953449B1 true EP1953449B1 (en) 2012-02-22

Family

ID=39473927

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08425045A Not-in-force EP1953449B1 (en) 2007-02-01 2008-01-30 Lighting fixture with LEDs, which is fixable to ceilings and to walls

Country Status (6)

Country Link
EP (1) EP1953449B1 (es)
AT (1) ATE546687T1 (es)
ES (1) ES2380991T3 (es)
IT (1) ITVI20070031A1 (es)
PL (1) PL1953449T3 (es)
PT (1) PT1953449E (es)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITFI20090213A1 (it) * 2009-10-05 2011-04-06 Nord Light S P A Apparecchio di illuminazione
JP2011175869A (ja) * 2010-02-24 2011-09-08 Toshiba Lighting & Technology Corp 光源ユニット及び照明装置
AT512105B1 (de) * 2011-10-17 2013-08-15 Heper Moonlight Europ Gmbh Leuchtmittel
ITMI20130509A1 (it) * 2013-04-04 2014-10-05 Bevilacqua Carlotta Francesca Isolina Maria De Sistema di illuminazione avente elementi ottici modulari asimmetrici
DE102013207663A1 (de) * 2013-04-26 2014-10-30 Zumtobel Lighting Gmbh LED-Leuchte mit unterschiedlich einstellbaren Lichtverteilungen
DE102015104331A1 (de) * 2015-03-23 2016-09-29 Siteco Beleuchtungstechnik Gmbh LED-Modul mit schaufelförmigem Reflektor sowie Leuchte mit entsprechendem LED-Modul

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4042817A (en) * 1973-07-05 1977-08-16 Mcnamara Jr Albert C Quasi-indirect monosymmetrical lighting system
DE3702236A1 (de) * 1986-01-27 1987-12-10 Steinecke Wolfhart Strahler fuer die indirekte beleuchtung eines raumes
US5278737A (en) * 1991-11-06 1994-01-11 Visa Lighting Corporation Wall and ceiling lighting unit
US6257737B1 (en) * 1999-05-20 2001-07-10 Philips Electronics Na Low-profile luminaire having a reflector for mixing light from a multi-color linear array of LEDs
JP2001307508A (ja) * 2000-03-30 2001-11-02 Nsi Enterprises Inc 改良型戸外パネル照明器具
DE20315131U1 (de) * 2003-09-29 2005-02-10 Erco Leuchten Gmbh Reflektorleuchte, wie Boden-, Decken- oder Wandeinbau-Reflektorleuchte, insbesondere Stufen-Reflektorleuchte
US7040782B2 (en) * 2004-02-19 2006-05-09 Gelcore, Llc Off-axis parabolic reflector
US20060023457A1 (en) * 2004-07-08 2006-02-02 Leadford Kevin F Luminaire utilizing reflecting and refracting optics

Also Published As

Publication number Publication date
EP1953449A2 (en) 2008-08-06
EP1953449A3 (en) 2010-12-29
ATE546687T1 (de) 2012-03-15
PL1953449T3 (pl) 2012-07-31
PT1953449E (pt) 2012-05-10
ES2380991T3 (es) 2012-05-22
ITVI20070031A1 (it) 2008-08-02

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