EP4160085A1 - Emergency luminaire - Google Patents

Emergency luminaire Download PDF

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Publication number
EP4160085A1
EP4160085A1 EP22382867.4A EP22382867A EP4160085A1 EP 4160085 A1 EP4160085 A1 EP 4160085A1 EP 22382867 A EP22382867 A EP 22382867A EP 4160085 A1 EP4160085 A1 EP 4160085A1
Authority
EP
European Patent Office
Prior art keywords
microstructure
luminaire
led
lenses
diffuser
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.)
Pending
Application number
EP22382867.4A
Other languages
German (de)
English (en)
French (fr)
Inventor
Mario Gonzalez Montes
Urko MARKINEZ OLABARRIETA
José LENS FERNANDEZ
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.)
Daisalux SLU
Original Assignee
Daisalux SLU
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 Daisalux SLU filed Critical Daisalux SLU
Publication of EP4160085A1 publication Critical patent/EP4160085A1/en
Pending 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
    • F21V5/00—Refractors for light sources
    • F21V5/007—Array of lenses or refractors for a cluster of light sources, e.g. for arrangement of multiple light sources in one plane
    • 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
    • F21V5/00—Refractors for light sources
    • F21V5/002—Refractors for light sources using microoptical elements for redirecting or diffusing light
    • F21V5/004—Refractors for light sources using microoptical elements for redirecting or diffusing light using microlenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/69—Details of refractors forming part of the light source
    • 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
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F21V5/045—Refractors for light sources of lens shape the lens having discontinuous faces, e.g. Fresnel lenses
    • 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
    • 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • 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 invention falls within the sector of emergency lighting; in particular the manufacture of luminaires for anti-panic lighting and evacuation routes, as well as backlit signage and emergency beaconing by means of LEDs or other light sources and the corresponding optical elements thereof.
  • the invention is applicable to other lighting solutions.
  • an emergency luminaire comprises a casing that contains the electronics -and optionally the batteries thereof- and the light source, in front of which the required optical components (lenses, reflectors, diffusers, etc.) are placed, responsible for diffusing light in all directions or according to an application-specific distribution in accordance with a required photometry.
  • the optical components are made of transparent or opal glass or polymeric materials.
  • a diffuser or a lens is used, or a combination of several of them.
  • the diffuser comprises a first microstructured surface formed by a plurality of smooth saw teeth or other surface irregularities.
  • Document EP2204604 describes a lamp for illuminating building surfaces, which includes as a light source, a secondary optics that integrates several collimators with several LEDs, the light rays of which are transmitted in the same direction, perpendicular to a tertiary optics that is formed by a flat translucent element exhibiting light-directing microstructures, with a fixed pattern in shape and orientation, which extend along the entire length of said translucent element, diffusing the beam of each lens body at an angle of refraction ⁇ , for which reason the function of this lamp is to illuminate a surface or an object in the most homogeneous way possible.
  • an object of the present invention is to provide a compact optical component for an emergency luminaire that can be suited as:
  • the configuration of said microstructure is such that it converts each ray into another outer ray with the desired angle to provide a shape for the projection of the output light according to the lighting requirements that the luminaire must meet, either as an anti-panic, evacuation of ceiling or wall luminaire.
  • Said internal microstructure to the diffuser which gives it lens properties in certain areas, for which reason said areas have been called lenses throughout this description, is present in at least one area of the inner face of said diffuser, preferably in different areas in a number comprised between 1 and those required to achieve lighting objectives, and for each of these lenses there is an internal LED that projects individual light on each of them.
  • the internal microstructure of said lenses has been created by means of an algorithm that allows the calculation of the sawtooth points of said microstructure so that each ray of light of the output beam is adjusted in the desired direction depending on the angle refracted inside the microstructure with respect to the position of the LED that illuminates this lens from inside the luminaire.
  • FIG.1 wherein a portion of one of the lenses (L) shaped in the diffuser of this luminaire has been represented, in which the following have been indicated:
  • the method for calculating the microstructure consists of determining the Alfap0 angle in the successive microstructured facets starting from the outermost (as0) facet of the microtexturised surface, which is bathed by the light of the LED in the Lambertian thereof; when the LED is placed at the focal distance it subtends to about 60°, or the opening angle that corresponds to the LED used to achieve maximum light use.
  • the initial angle of Alfap0 is determined by the maximum angle of incidence of the LED to the microstructure (Alfa00) and by the angle with which the ray impinges on the second surface (Alfan1), this ray is not always the same since it depends on the angle that impinges on the microstructured portion and the direction of the ray that goes to the second surface.
  • a loop is programmed to determine the following points of the microstructure assuming that, as we have already indicated, the peak-to-valley period (Dx) of the same remains constant and so does the distance to the light source (d).
  • the manufacturing process is carried out by plastic injection using traditional techniques to achieve the replication of the microstructures of the mould in the final part, obtaining in a single process a single diffuser part that integrates at least one microstructured lens with beam shaping capabilities. according to the specific requirements of the application.
  • an injection-compression process can be applied at the end of the classic injection process, this process allowing adjustments of injection parameters to achieve dimensional objectives, warping, etc. of the diffuser as a whole.
  • the compression is carried out on tempered steel inserts of the dimensions of the lens, which are obtained through a microtexturing process with femtosecond laser, which does not require subsequent micropolishing processes, the radius of the laser beam being that which defines the dimensional parameterisation of the microstructures (depths and periods).
  • the inserts could be made using other processes and/or in other materials that would support the process and the repetitiveness of the injection.
  • This luminaire can be easily suited to different emergency lighting modalities, simply by modifying the parameters of the microstructure configuration (Ms) existing in the lenses (L) thereof, allowing its use for:
  • the invention relates to an emergency luminaire that is shaped from a casing through which it is attached to the ceiling or wall, inside of which an electronic circuit is assembled for ignition of at least one LED diode, assembled on a support that allows it to be kept at a certain focal distance with respect to an optical component that we will indicate as a diffuser (D) in order to illuminate a specific area, depending on the type of luminaire that is used, as explained in more detail below.
  • D diffuser
  • the diffuser (D) is a single-piece body, made of polycarbonate or another transparent/translucent plastic material that allows the manufacture thereof by means of an injection process; externally it exhibits a smooth (flat or curved) surface (SEx), while on the inner surface at least one lens (L) has been shaped, which is defined by a microstructure (Ms) that upon receiving the light emitted by an LED converts each ray received into another outer ray with the desired angle to provide a shape for the output light beam according to the application of the luminaire, either as an anti-panic, ceiling or wall evacuation luminaire, or that desired objective photometry
  • an LED is located, placed at a focal distance (d) from said predetermined microstructure so that it is in correspondence to the focal point, in such a manner that the lens (L) located in front of it receives the radiation with a Lambertian emission pattern for maximum use.
  • the focal length (d) of the LED diode to the microstructure is approximately 4 mm, so that the maximum angle (Alpha00) at which the LED subtends is 60° (or that of the LED aperture, which can be parameterised in the calculation algorithm) leads to target dimensions of the microstructure.
  • the Alpha00 angle and this focal length can be parameterised, the angle corresponds to the Lambertian aperture of the light source and the focal length could be considered parameterisable from 0.5mm to 8mm.
  • the thickness (sp) of the diffuser (D) is also preferably constant, although it is likely to be variable, including the area or areas in which the lenses (L) are microstructured and in a preferred embodiment in the example it is about 2 mm in polycarbonate, which corresponds to the requirement for regulatory compliance with IK04 impact resistance, but can also be parameterised in the calculation algorithm. In any case, this thickness will always be a minimum of 10 times the greatest depth of the microstructure.
  • the microstructure (Ms) defined on the inner face of the diffuser (D), which shapes each of said lenses (L), has been calculated by means of an algorithm that determines the configuration of a plurality of sawtooth cuts the greater edge (as0, as1, etc.) of which makes up the active face thereof, since it is the one located in front of the LED.
  • Said microstructure is distributed with a constant peak-to-valley distance from the outside to the inside on the horizontal axis (Dx) of the aforementioned saw teeth, while the opening angle (Alfap0) of the successive sawtooth edges (as0, as1, ...) increases progressively towards the centre of the lens, so that each light ray of the output beam through said facets is adjusted in the desired direction depending on the internal angle of the microstructure, with respect to the position of the LED that illuminates this lens from inside the luminaire. More specifically and as we have explained previously, the algorithm that determines the opening angle (Alfap0) in the successive active faces (as0, as1, ...) of the microstructures (Ms) is provided by equation [1]. For its part, the angle of the output rays (Alfaout) in this part of the microstructure is given by equation [2].
  • the period of the microstructure, or peak-to-valley distance (from the outside to the inside of the microstructure) on the horizontal axis, (Dx) of the same is approximately 100 microns; although this measurement can range from 5 to 300 microns depending on the beam radius of the femtosecond laser used in the manufacture thereof.
  • Fig. 2 shows an embodiment of a luminaire made according to the invention, wherein the number of microstructured areas by way of lenses (L) present on the inner face of said diffuser (D) is 6 and they are aligned.
  • This number can vary widely, and although the usual arrangement is also aligned, it is possible to think of other types of groupings, for example forming a circle in the case of luminaires with a more circular or more rounded form factor; however, what always remains is that behind each of these lenses (L) an LED is located in correspondence with the centre thereof and at the distance calculated for the microstructure, which do not have to be the same.
  • Fig. 3 and 4 show the lenses (L) of an anti-panic luminaire, intended to illuminate a large area under a luminaire attached to the ceiling.
  • each of the lenses (L) shaped in the diffuser (D) is defined by a microstructure (Ms) built from the linear model described above, forming an axial rotation in order to form successive concentric microstructures with respect to the centre of the lens in the vertical of which the corresponding LED diode is placed.
  • Ms microstructure
  • FIG. 4 shows the manner in which the angle of the sawtooth edge of the microstructure is increasing towards the centre of the lens, which corresponds to an area in which there is an inverted frustoconical approximation hole (Ht), which protrudes through the inner face of the diffuser (D) and which shapes a surface in which the rays that the LED focussed on said microstructure emits towards the centre are deflected towards the sides in order to achieve a substantially uniform photometry/diffusion on the illuminated circular surface (as seen in Fig. 3 ), allowing optimal projection (photometry) in terms of uniformity of light on the ground
  • Fig. 5 shows the distribution of light in a luminaire for lighting evacuation routes and security points, placed on the ceiling.
  • each of the lenses (L) shaped in the diffuser is divided into four sectors, of which the two that are aligned with the evacuation route exhibit different microstructures shaped following parabolic-shaped guide curves calculated to direct the rays in the direction of the evacuation route, 3 guide curves have been used, the microstructures between them being the linear interpolation of the peak-to-peak distances and maintaining the depth.
  • the different sectors are separated by radial lines calculated for maximum light use.
  • each of these lenses exhibits a local microstructure (Ms2) that shapes light beams intended to illuminate specific points on the sides of the route where, for example, safety elements (fire extinguishers, etc.) are located.
  • Ms2 local microstructure
  • the calculation of the guide curves is carried out according to the same method as that described for the anti-panic lens, its curvature being calculated for the maximum guidance of the light in the directions of interest.
  • Fig. 6 and 7 show a luminaire for lighting evacuation routes and security points of those that are placed attached to a wall.
  • each of the lenses (L) shaped in the diffuser (D) exhibits several concentric circumferential microstructures in which a first lower microstructured area (Ms4) with a circular configuration is defined, built from the linear model described above and a second upper microstructured area (Ms3) with a constant angle and on the external face a prism (PO) guiding the light rays vertically and downwards (ground).
  • Ms4 first lower microstructured area
  • Ms3 second upper microstructured area
  • PO prism
EP22382867.4A 2021-09-21 2022-09-20 Emergency luminaire Pending EP4160085A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES202130882A ES2936957B2 (es) 2021-09-21 2021-09-21 Luminaria de emergencia

Publications (1)

Publication Number Publication Date
EP4160085A1 true EP4160085A1 (en) 2023-04-05

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ID=83594137

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22382867.4A Pending EP4160085A1 (en) 2021-09-21 2022-09-20 Emergency luminaire

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EP (1) EP4160085A1 (es)
ES (1) ES2936957B2 (es)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2204604A1 (de) 2008-12-30 2010-07-07 ERCO GmbH Leuchte
US20140160743A1 (en) * 2012-12-07 2014-06-12 Wintek Corporation Light tube
WO2015132290A1 (en) * 2014-03-04 2015-09-11 Koninklijke Philips N.V. Beam shaping system and an illumination system using the same
NL2019706B1 (en) * 2017-10-11 2019-04-19 Etap Nv A lighting unit
EP3686484A1 (en) * 2019-01-25 2020-07-29 Eaton Intelligent Power Limited Optical structures for light emitting diodes (leds)

Family Cites Families (3)

* 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
US9593822B2 (en) * 2011-11-08 2017-03-14 Philips Lighting Holding B.V. Light-shaping optical element
US9719657B2 (en) * 2015-06-09 2017-08-01 Hazard Systems Pty Ltd. Low-profile optical warning system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2204604A1 (de) 2008-12-30 2010-07-07 ERCO GmbH Leuchte
US20140160743A1 (en) * 2012-12-07 2014-06-12 Wintek Corporation Light tube
WO2015132290A1 (en) * 2014-03-04 2015-09-11 Koninklijke Philips N.V. Beam shaping system and an illumination system using the same
NL2019706B1 (en) * 2017-10-11 2019-04-19 Etap Nv A lighting unit
EP3686484A1 (en) * 2019-01-25 2020-07-29 Eaton Intelligent Power Limited Optical structures for light emitting diodes (leds)

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Publication number Publication date
ES2936957B2 (es) 2023-08-31
ES2936957A1 (es) 2023-03-22

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