EP1978299A2 - Appareil d'éclairage à montage mural - Google Patents

Appareil d'éclairage à montage mural Download PDF

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Publication number
EP1978299A2
EP1978299A2 EP08425145A EP08425145A EP1978299A2 EP 1978299 A2 EP1978299 A2 EP 1978299A2 EP 08425145 A EP08425145 A EP 08425145A EP 08425145 A EP08425145 A EP 08425145A EP 1978299 A2 EP1978299 A2 EP 1978299A2
Authority
EP
European Patent Office
Prior art keywords
lighting equipment
light source
light
wall
shaped reflector
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.)
Ceased
Application number
EP08425145A
Other languages
German (de)
English (en)
Other versions
EP1978299A3 (fr
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
Publication of EP1978299A2 publication Critical patent/EP1978299A2/fr
Publication of EP1978299A3 publication Critical patent/EP1978299A3/fr
Ceased legal-status Critical Current

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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
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S9/00—Lighting devices with a built-in power supply; Systems employing lighting devices with a built-in power supply
    • F21S9/02—Lighting devices with a built-in power supply; Systems employing lighting devices with a built-in power supply the power supply being a battery or accumulator
    • F21S9/022—Emergency lighting devices
    • F21S9/024—Emergency lighting devices using a supplementary light source for emergency lighting
    • 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
    • F21V7/0091—Reflectors for light sources using total internal reflection
    • 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
    • F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
    • 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 wall-installed lighting equipment with a single light source (LED).
  • the invention refers to a specific optical system, which is able to make the most of the emission of an LED light source in the typical installation of the safety or emergency lighting.
  • the equipment is provided for distributing the light in an optimal way along the exit routes, where, according to the European legislation, must be guaranteed 1 lux on the midline of the exit route and 0.5 lux in a central band that is equal to half the width of the exit route (2 meters); in addition, the restaurant legislation specifies an illumination of at least 2 lux to 1 meter in height from the floor pavement.
  • a proper lighting must ensure in the visual field a sufficiently and rationally distributed high luminance to allow the perception of important areas, as well as for details, and to reduce dazzling to a minimum.
  • the safety or emergency lighting equipments should ensure that their luminous flux is sufficiently intense and concentrated to make it possible to identify easily and quickly the exit routes, particularly in the event of danger.
  • Luminance is defined as the ratio between the luminous intensity of a light source in a given direction and the apparent surface of said light source seen from the same direction; the value of luminance depends on the illumination, on the characteristics of reflection of the surfaces and on the directions of lighting and of observation.
  • the luminance is extremely difficult to calculate and, in practice, in the plan of a lighting system, the illumination is usually taken into consideration.
  • the illumination in a point of a surface is defined as the ratio of the luminous flux which affects an element of the surface around the point and the area of said element; therefore, the illumination can be easily envisaged and measured (in lux, by means of a luxmeter or an illuminometer) and thus the illumination can be conveniently and simply used to address technical issues, such as the plan of a lighting system.
  • the performance of a lighting equipment and in particular of an emergency lamp can be usually assessed by imposing a given illumination on a work surface; said work surface is conventionally constituted by an horizontal plane, which is placed at a certain distance from the floor, and a direct illumination is created when the light reaches the work surface directly from the light source (at least 90% of the luminous flux), while, on the contrary, an indirect illumination is created when the light reaches the work surface after being reflected, even several times, from the walls and/or from the ceiling of a room (at least 90% of the luminous flux).
  • Equipments for direct illumination are widely used for artificial lighting of buildings for civilian and industrial use, as well as a major source of light, both as a source of emergency or safety lighting.
  • Said equipments usually include an hollow body, in which a light source, such as a fluorescent tube, can be housed and connected to electrical terminals, in order to supply it; the body is closed through transparent protective screens, which are removable to allow access to the light source and to the electrical terminals.
  • a light source such as a fluorescent tube
  • the known lighting equipments and particularly the known safety or emergency lighting equipments have a distribution of the illumination on the work surface which is not much uniform and which is substantially unhomogeneous, even considering the relative position taken by a observer with respect to the light source; moreover, the illumination is relatively concentrated and not much intense, so that it is not practically possible to obtain an acceptable compromise between the intensity of the luminous flux and the concentration of the luminous beam, which are two crucial parameters when an emergency situation takes place in civil and work environments and when said environments must be illuminated with fluorescent lamps.
  • a purpose of the present invention is therefore to overcome the disadvantages mentioned above and, in particular, to carry out a wall-installed lighting equipment, which is able to distribute the light in an optimal way along the exit routes, on the basis of the European regulations on the illumination of various areas along said exit routes.
  • Another purpose of the present invention is to carry out a wall-installed lighting equipment, which is able to give, in any case, a desired distribution of the illumination and an optimum efficiency of the optical system.
  • Another purpose of the present invention is to carry out a wall-installed lighting equipment, which has both an illuminating efficiency, as indicated earlier, and a pleasant aesthetical appearance.
  • the lighting equipment according to the invention has a single light source (preferably a LED source), is a wall-installed lighting equipment and is designed to make the most of the direct light coming from the source and of the light that is reflected from the reflector, in order to obtain an ideal photometric solid, which is able to meet with European regulations on light distribution along the exit routes.
  • a single light source preferably a LED source
  • the wall-installed lighting equipment of the present invention uses, in particular, as a light source, a power LED A, which is placed centrally and on a perimeter length 10 of a shaped reflector 11 of the wall-installed lighting equipment (see in particular figs. 1-3 ).
  • the lighting equipment can be used as a safety or emergency lighting equipment and is provided for distributing the light in an optimal way along the exit routes, where, according to the European regulations, must be guaranteed 1 lux on the midline and 0.5 lux in a central band equal to half (1 meter) of the width of the exit route (2 meters); the lighting equipment is able to create an ideal photometric solid, making the most of the light directly coming from the light source (LED) and of the light which is reflected from the reflector 11.
  • LED light source
  • the light source A (LED) is oriented (line 12 in figure 4 ) for obtaining a beam of direct light with an angle ⁇ , relative to the horizontal line R, equal to 22° ⁇ 10° (arctg (1/2, 5) .
  • This value of the angle ⁇ allows to get the maximum of illumination due to the direct light along the midline of the exit route.
  • the direct light is always distributed in such a way as to illuminate a central portion of the exit route, according to the current regulations (equal to half the width V of the exit route, as shown in figure 4 ).
  • the reflector 11 is designed to address the light beam emitted from the source A always in the central portion of the exit route (equal to half the width V of the exit route), according to the European regulations.
  • the other lines of the profile are optimized for homogeneously sending the light in an area which is delimited by the highest beam aperture (bounded by radii 13 and 20).
  • Lines B, C, D, E of the profile have, for example, a value of inclination, relative to the wall P, which is between 70° and 50°, while the lines G, H, I, L, M have a value of inclination, relative to the wall P, which is between 5° and -25°.
  • the broken line (which is shown in detail in Figure 5 ) consists of several vertical lines S (from a minimum of 2 lines), which are linked by diagonal lines T, connecting said vertical lines S; the diagonal lines T also have an inclination which is between -20° and 60°, relative to the base of the light source A.
  • a rectangular reflector is not used (for aesthetical reasons), but a geometry is provided by breaking the two vertical lines (indicated with J and K, respectively, in figure 5 ) of a rectangular reflector in different parts, as shown in figure 5 .
  • the S vertical lines can optimally distribute the light emitted by the light source A, while T diagonal lines, connecting said vertical lines S, do not contribute to the distribution of the light.
  • a wall-installed lighting equipment which is used, in particular, for the safety or emergency lighting and which includes a shaped reflector 11, as described above, allows to outline a lighted area, such as to convey the flow that is emitted from the light source A to a predetermined area (indicated by the European regulations), in order to obtain a maximum illumination on the midline of each exit route, so as to limit the illumination in a central portion which is equal to half the width of the exit route (2 meters) and to have a wide opening in the direction of the length of the exit route.
  • the light that is emitted from the LED source A is directed according to the user's needs, without spreading the light in areas where there is no need to have light.
  • the wall-installed lighting equipment of the present invention is particularly useful as a safety or emergency lighting equipment because it gives an optimal distribution of light along the exit routes; moreover, the shaped perimeter of the reflector 11 of the lighting equipment allows to obtain an ideal photometric solid (shown in Figures 7 and 8 ) and an ideal polar diagram ( Figure 6 ), in order to meet the European regulations regarding the illumination along the exit routes, making the most of the direct light of the LED light source A and the light that is reflected from the walls of the reflector 11.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
EP08425145A 2007-04-06 2008-03-10 Appareil d'éclairage à montage mural Ceased EP1978299A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000109A ITVI20070109A1 (it) 2007-04-06 2007-04-06 Apparecchio di illuminazione installabile a parete

Publications (2)

Publication Number Publication Date
EP1978299A2 true EP1978299A2 (fr) 2008-10-08
EP1978299A3 EP1978299A3 (fr) 2010-06-30

Family

ID=39463233

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08425145A Ceased EP1978299A3 (fr) 2007-04-06 2008-03-10 Appareil d'éclairage à montage mural

Country Status (2)

Country Link
EP (1) EP1978299A3 (fr)
IT (1) ITVI20070109A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1586166A (fr) * 1968-08-08 1970-02-13
DE3129036A1 (de) * 1981-07-17 1983-02-03 Achim Dipl.-Ing. Dr.-Ing. 1000 Berlin Willing Notleuchte zur beleuchtung von fluchtwegen
JPH07201210A (ja) * 1993-12-29 1995-08-04 Patoraito:Kk 信号表示灯の光源構造
US5416678A (en) * 1994-02-01 1995-05-16 Santa's Best Socket with light concentrator
US6425680B1 (en) * 2000-09-07 2002-07-30 Genlyte Thomas Group Llc Unitary reflector for a recessed mounted lighting fixture

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Also Published As

Publication number Publication date
ITVI20070109A1 (it) 2008-10-07
EP1978299A3 (fr) 2010-06-30

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