EP4107426A1 - Appareil d'éclairage allongé - Google Patents

Appareil d'éclairage allongé

Info

Publication number
EP4107426A1
EP4107426A1 EP21704227.4A EP21704227A EP4107426A1 EP 4107426 A1 EP4107426 A1 EP 4107426A1 EP 21704227 A EP21704227 A EP 21704227A EP 4107426 A1 EP4107426 A1 EP 4107426A1
Authority
EP
European Patent Office
Prior art keywords
light
reflectors
pot
longitudinal direction
secondary optics
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
EP21704227.4A
Other languages
German (de)
English (en)
Inventor
Bogna Ludwiczak
Matthias COVI
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.)
Zumtobel Lighting GmbH Austria
Original Assignee
Zumtobel Lighting GmbH Austria
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 Zumtobel Lighting GmbH Austria filed Critical Zumtobel Lighting GmbH Austria
Publication of EP4107426A1 publication Critical patent/EP4107426A1/fr
Pending legal-status Critical Current

Links

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
    • F21S4/00—Lighting devices or systems using a string or strip of light sources
    • F21S4/20—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports
    • F21S4/28—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports rigid, e.g. LED bars
    • 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
    • F21V7/0083—Array of reflectors for a cluster of light sources, e.g. 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
    • F21V5/005—Refractors for light sources using microoptical elements for redirecting or diffusing light using microprisms
    • 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
    • F21V7/06—Optical design with parabolic curvature
    • 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 present invention relates to an elongated lamp with the aid of which a large amount of light is to be emitted without glare over a narrow light exit area.
  • Linear lighting solutions are used in lighting technology in a variety of ways and are made available both in Lorm by individual lights and in Lorm by elongated so-called light bands. Due to their narrow design, such lights or light strips are often distinguished by their elegant appearance compared to large-area lights, which is why they are used in a wide variety of applications. If such lights are to be used to illuminate workplaces, it is necessary that a correspondingly high amount of light is emitted in order to be able to meet the requirements of conventional workplace lighting.
  • the solution that has hitherto been customary for realizing a narrow linear luminaire then consisted in using several LED modules arranged one behind the other, which are encompassed by a white or mirrored channel reflector.
  • the present invention is based on the object of providing a corresponding luminaire which meets the above criteria with regard to its light output.
  • the elongated light source is formed by several LEDs or LED clusters arranged one behind the other in the longitudinal direction.
  • a homogeneous light emission over the entire surface of the elongated, narrow light exit opening is achieved with the aid of a plate-shaped element made of a transparent material which has light-refracting structures.
  • the use of primary optics is provided upstream of this plate-shaped element, which is formed by several cup-like reflectors arranged one behind the other in the longitudinal direction, each extending diverging from the light source in a light emission direction of the lamp.
  • a luminaire which has:
  • an elongated light source which is formed by several LEDs or LED clusters arranged one behind the other in the longitudinal direction
  • a primary optic assigned to the light source which is formed by several pot-like reflectors arranged one behind the other in the longitudinal direction, each of which extends diverging from the light source in a light emission direction of the luminaire,
  • a secondary optic which follows the primary optic in the light emission direction and is formed by a plate-shaped element made of a transparent material, the plate-shaped element having light-refracting structures.
  • the light-refracting structures of the secondary optics can in particular be prism-like structures, particularly preferably pyramidal structures Act prism structures. Structures of this type are already known per se and serve to expand and glare in a controlled manner the light distribution of a beam entering on the input side. It has now been shown that the anti-glare efficiency of such scatter structures is highest when the incident light strikes the secondary optics in an almost ideally bundled manner. According to the invention, this object is achieved through the use of the primary optics which, with the aid of the pot-like reflectors, deflect the light emitted by the LEDs or LED clusters into almost perfectly parallel light beams. In this way, an extremely efficient influencing of the light output is made possible, which ensures the desired, glare-free light distribution, especially with high amounts of light and narrow light exit openings.
  • the pot-like reflectors have light exit openings which lie in a common plane, the secondary optics then being arranged at a distance from this plane, in particular at a distance of approximately 4 mm.
  • This measure ensures that no individual bundles of rays impinge on the light entry side of the secondary optics, but instead an overlap occurs in the transition area between two adjacent cup-like reflectors, which reduces or compensates for differences in luminance. As a result, the appearance of the light-emitting area of the lamp is homogenized overall.
  • the pot reflectors viewed in the longitudinal direction, have side wall regions which have a parabolic shape, the LEDs or LED clusters then being arranged in the focal point of this parabolic shape.
  • the parabolic shape ensures particularly efficient bundling of the light, which - as explained above - is important with regard to the mode of operation of the secondary optics.
  • a corresponding parabolic shape of the pot-like reflectors would also be advantageous in the transverse direction of the lamp.
  • the distance between the individual LEDs or LED clusters should be selected to be relatively small in order to achieve a high amount of light and the pot-like reflectors are accordingly close to one another, with a continuous parabolic shape of the reflector walls there would be an overlap between two adjacent reflectors.
  • a development of the invention provides that the side wall areas of the pot-like reflectors extending transversely to the longitudinal direction of the lamp merge into inclined, flat side surfaces.
  • the pot-like reflectors each have light entry openings, each light entry opening then being assigned an LED or an LED cluster.
  • the LEDs or LED clusters are then in the case of parabolic reflector walls in the focal point of the parabola.
  • an additional light-diffusing element in particular a diffusing film, is arranged between the primary optics and the secondary optics. This can be arranged, for example, on the light entry side of the secondary optics, resting on the latter.
  • the lamp according to the present invention preferably has an elongated housing which forms a narrow light exit opening, the light exit opening being completely closed by the secondary optics or a transparent cover resting on the secondary optics. All the light leaving the lamp is thus influenced in the desired manner by the measures according to the invention described above, so that with a preferred width of the light exit opening of about 3 cm, a large amount of light can be emitted in high quality despite everything.
  • Figure 1 shows an embodiment of a lamp according to the invention in a perspective view
  • FIG. 2 shows a sectional illustration of the lamp according to the invention in the transverse direction
  • FIG. 3 shows a sectional illustration of the lamp according to the invention in the longitudinal direction
  • FIGS. 4 and 5 show two perspective views of the component forming the primary optics
  • FIG. 6a shows the influence of the primary optics on the light emitted by the LEDs
  • FIG. 6b shows the light distribution that can be achieved by the primary optics
  • FIG. 7 a the further influence of the light by the secondary optics
  • the concept described below for influencing the light is not limited to the individual luminaire shown and corresponding applications, but can always be used when homogeneous light of high intensity is to be emitted over a relatively narrow area in such a way that the The risk of dazzling a viewer is largely avoided.
  • the use of the optical concept described below would also be suitable for so-called elongated light strips, through which narrow elongated strips are formed in a wall or ceiling area of a room, and light is emitted homogeneously over their entire length.
  • the luminaire 100 shown in a perspective view in FIG. 1 and in a section in FIGS. 2 and 3 thus initially has an elongated housing 50 which is essentially formed by an elongated profile part 55.
  • This profile part 55 which is designed for attachment to a mounting rail in the illustrated embodiment, but could also be mounted in the same way on or in the ceiling of a room or suspended, has a C- or H-shaped cross section and thus forms a elongated receiving space for storing the components responsible for light generation and light emission.
  • An operating device 110 is also arranged on the upper side of the profile part 55, which converts the supply voltage made available to the luminaire 100 into a suitable operating voltage for the lighting means.
  • the profile part 55 is ordered here, for example, from a corresponding extruded profile, for example from aluminum, although other materials would also be conceivable.
  • an elongated light exit opening 51 is defined by the two side walls 52 of the profile part 55, through which the light from the lamp 100 is emitted.
  • LEDs 60 which are positioned in the longitudinal direction of the housing 50 on one or more LED boards 65 arranged one behind the other, are used as lighting means in the luminaire 100 according to the present invention.
  • these are in each case individual LEDs 60.
  • LED clusters are used which consist of several LEDs. If these are designed to emit light in different colors or color temperatures, then within the scope of an individual control of the various LEDs there would be the possibility of influencing the color or color temperature of the light emitted as a whole by the luminaire 100.
  • the LED board (s) 65 is or are arranged on a web 56 extending essentially horizontally through the profile part 55.
  • the inventive influencing of the light generated by the LEDs 60 takes place with the aid of an optical system 10, the structure and function of which will be explained in more detail below.
  • the optical system 10 consists essentially of two components, on the one hand primary optics 20, which are directly assigned to the LEDs 60, and on the other hand secondary optics 30 located in the area of the light exit opening 51 of the luminaire 100.
  • the design and mode of operation of the primary optics 20 will first be explained.
  • This is a component which is also shown individually in FIGS. 4 and 5 and forms several pot-like reflectors 25 arranged one behind the other in the longitudinal direction of the lamp 100, which are intended to bundle the light emitted by the LEDs 60 in a first step.
  • These primary optics 20 are preferably formed by an injection-molded plastic part, which is then coated or mirrored in a correspondingly highly reflective manner.
  • Several of the pot-like reflectors 25, preferably all of them, are combined in one piece to form the component shown.
  • the configuration of the primary optics 20 in this case is such that each LED 60 (or each LED cluster) is assigned a reflector cup 25 which is intended to bundle the light from this LED 60 accordingly.
  • the reflector cup 25 has a light inlet opening 26 on its side facing the LEDs 60, in which the LED 60 is positioned or into which the LED 60 protrudes accordingly.
  • the side walls of the reflector pot 25 extend divergingly downward, so they widen in the light emission direction of the lamp 100, each enclosing a corresponding light outlet opening 27 at the lower end. From the lateral areas of these light exit openings 27 extend - as can be seen in particular in FIGS. 2, 4 and 5 - lateral webs 21 with latching arms 22 arranged on them, via which latching with corresponding projections of the profile part 55 forming the housing 50 takes place. In this way, a simple, tool-free fastening of the primary optics 20 in the luminaire housing 50 is made possible.
  • the webs 21 are inclined outward in such a way that they do not fulfill any essential function for the emission of light. At most, rays reflected or scattered on the surface of the secondary optics 30 described in more detail below could additionally be reflected on these surfaces. The actual light influencing takes place, however, as explained below, through the side walls of the pot-like reflectors 25.
  • the function of the pot reflectors 25 is to bundle the light emitted by the LEDs 60 as closely as possible, in particular in such a way that the resulting beam has a so-called full width at half maximum (FWHM) below 10 °.
  • a correspondingly strong bundling of the light can be achieved, for example, in that the highly reflective side walls of the pot reflectors 25 are parabolically shaped, that is, follow a parabolic shape, with the LEDs 60 being arranged in the focal point of the parabola.
  • the lateral wall areas 25 a of the pot reflectors viewed in relation to the longitudinal direction of the luminaire 100, have this parabolic shape and are designed to be rotationally symmetrical in relation to the central axis I (see FIG. 2) .
  • the pot reflectors 25 should be designed to be rotationally symmetrical over their entire circumference.
  • the present lamp 100 is intended to generate and generate a relatively large amount of light are emitted, which means that the LEDs 60 or LED clusters are arranged in the longitudinal direction of the luminaire 100 with a relatively small distance behind one another. This small distance between the LEDs 60 means that in the case of a complete rotational symmetry of the pot reflectors 25, they would correspondingly overlap.
  • the pot reflectors 25 are thus formed overall from two different side wall areas 25a, 25b, on the one hand the side wall areas 25a in comparison to the longitudinal center plane of the lamp 100, which are completely or over their entire height parabolic and rotationally symmetrical in relation to the axis I are, and on the other hand the transverse to this extending wall areas 25b, which merge into a planar shape and thereby form the V-shaped transverse lamellar structures recognizable in Figure 3.
  • FIGS. 6a and 6b show the effect of the primary optics 20 on the light emitted by the associated LEDs 60
  • FIG. 6a shows the simulated beam path of the LED light
  • FIG. 6b shows the resulting light distribution curve.
  • the beam path in FIG. 6a already shows that the light initially emitted by the LEDs 60 in a wide angular range is reflected by the side wall areas 25a and 25b of the cup reflectors 25 in such a way that it is directed downwards as an almost perfectly parallelized bundle of rays.
  • FIG. 6b shows an extremely strong bundling of the light with an extremely small half-width.
  • the planar design of the transversely aligned side wall regions 25b has no negative effects and the bundling of light and the light beams are efficiently parallelized in the longitudinal direction of the luminaire 100.
  • This secondary optic 30 is a microprismatic plate which is formed from a transparent material and has pyramid-like microprismatic structures 35 on its surface facing away from the LEDs 60.
  • the angle of inclination of the individual pyramids is in the range of 111 °.
  • Such structures are already known per se and are widely used in lighting technology. she serve to guide light that occurs slightly in order to adapt the light output to a desired light distribution and glare reduction.
  • the mode of operation of the secondary optics 30 is better, the more strongly the light striking it is bundled. This is the reason that the pot reflectors 25 of the primary optics 20 are designed in the manner described above to bundle the light emitted by the LEDs 60 extremely strongly.
  • FIGS. 7a and 7b show the beam path of the light and the light distribution ultimately resulting therefrom. It can be seen that the initially strongly parallelized light is expanded again by the pyramid-shaped prism structures 35 and is emitted over a desired angular range, although this is selected so that a half-width of about 60 ° is not exceeded and thus the prerequisite for a UGR -Value below 19 is observed.
  • Primary optics 20 and secondary optics 35 in combination thus enable a very high amount of light to be emitted via the light exit opening 51 of the luminaire 100 and this despite everything corresponds to a desired light distribution, in particular a light distribution that can be used to illuminate office workplaces.
  • the light exit openings 27 of the pot reflectors 25, which lie in a common plane E, have a certain distance d from the surface O of the secondary optics 30 (see FIG. 2 in this regard).
  • This distance d is necessary in order to avoid that the bundles of rays generated by the pot reflectors 25 impinge on the secondary optics 30 separately. Instead, light can now also hit areas of the secondary optics 30 which are not directly below the opening 27 of a pot reflector 25.
  • the light exit opening 51 appears substantially uniformly bright over the entire length and width.
  • the secondary optics 30 does not form the final light exit element of the lamp 100.
  • a planar cover 40 made of a transparent material is provided for this purpose, which is arranged in the area of the light exit opening 51 of the housing 50 and on which the secondary optics 30 is stored.
  • this cover 40 is of no further importance for the emission of light, since it is not intended to have a decisive influence on the light rays.
  • a diffusing film or, in general, a light-diffusing element 45 is positioned on the upper side of the secondary optics 30 facing the LEDs 60. This is intended to prevent a direct view of the luminaire 100, so that the individual LEDs 60 or LED clusters and the individual pot reflectors 25 cannot be seen by a viewer. Like the cover 40, however, this only slightly scattering film 45 should not significantly influence the previously explained function of the primary optics 20 and the secondary optics 30.
  • the optical concept according to the invention thus opens up the possibility of forming luminaires with extremely narrow light exit openings (for example in the range of only about 3 cm) which, despite everything, emit a very high amount of light homogeneously and without glare.

Landscapes

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

Abstract

L'invention concerne un appareil d'éclairage (100) ayant : une source de lumière allongée, qui est formée par de multiples DEL (60) ou des groupes de DEL disposés les uns derrière les autres dans la direction longitudinale ; un système optique primaire (20), qui est associé à la source de lumière et qui est formé par de multiples réflecteurs en forme de pot (25), qui sont disposées l'un derrière l'autre dans la direction longitudinale et s'élargissent chacune de manière divergente de la source de lumière dans une direction d'émission de lumière de l'appareil d'éclairage (100) ; et un système optique secondaire (30), qui suit le système optique primaire (20) dans la direction d'émission de lumière et est formé par un élément plan constitué d'un matériau transparent, l'élément ayant des structures de réfraction de lumière (35).
EP21704227.4A 2020-02-19 2021-02-05 Appareil d'éclairage allongé Pending EP4107426A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202020100899.4U DE202020100899U1 (de) 2020-02-19 2020-02-19 Längliche Leuchte
PCT/EP2021/052890 WO2021165068A1 (fr) 2020-02-19 2021-02-05 Appareil d'éclairage allongé

Publications (1)

Publication Number Publication Date
EP4107426A1 true EP4107426A1 (fr) 2022-12-28

Family

ID=74572761

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21704227.4A Pending EP4107426A1 (fr) 2020-02-19 2021-02-05 Appareil d'éclairage allongé

Country Status (4)

Country Link
US (1) US11680690B2 (fr)
EP (1) EP4107426A1 (fr)
DE (1) DE202020100899U1 (fr)
WO (1) WO2021165068A1 (fr)

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Publication number Priority date Publication date Assignee Title
US6871983B2 (en) * 2001-10-25 2005-03-29 Tir Systems Ltd. Solid state continuous sealed clean room light fixture
EP1556648A1 (fr) * 2002-10-01 2005-07-27 Truck-Lite Co. Inc. Projecteur a diodes electroluminescentes et ensemble projecteur
TWI485878B (zh) * 2009-04-01 2015-05-21 Lite On Technology Corp 形成發光二極體之透鏡結構之方法及其相關架構
ES2648041T3 (es) * 2009-12-10 2017-12-28 Ivoclar Vivadent Ag Dispositivo de fotopolimerización para finalidades dentales
DE202009016793U1 (de) * 2009-12-11 2011-04-21 Zumtobel Lighting Gmbh Anordnung zur Lichtabgabe
KR20110087579A (ko) * 2010-01-26 2011-08-03 삼성엘이디 주식회사 Ｌｅｄ 모듈과 이를 구비하는 백라이트 유닛
JP2013065521A (ja) * 2011-09-20 2013-04-11 Minebea Co Ltd 配光制御部材及びそれを用いた照明装置
US8721129B2 (en) * 2012-01-26 2014-05-13 Hui-Peng TSENG LED lamp set for enhancing illumination and eliminating ghost images
EP2636943A1 (fr) 2012-03-06 2013-09-11 Hui-Peng Tseng Ensemble lampe à DEL permettant d'améliorer l'éclairage et d'éliminer les images fantômes
DE102012007206A1 (de) * 2012-04-10 2013-10-10 Erco Gmbh Leuchte
KR101275514B1 (ko) 2012-05-14 2013-06-20 주식회사 아이라이트 횡단보도용 조명장치
DE202013105863U1 (de) * 2013-12-20 2015-03-24 Zumtobel Lighting Gmbh Anordnung zum Entblenden der Lichtabgabe
DE202016002197U1 (de) * 2016-04-01 2016-06-06 Osram Gmbh Direktstrahlende LED-Leuchte mit Entblendungsoptik
CN205859845U (zh) 2016-07-22 2017-01-04 深圳北极之光科技有限公司 Led车灯

Also Published As

Publication number Publication date
DE202020100899U1 (de) 2021-05-26
WO2021165068A1 (fr) 2021-08-26
US20230067580A1 (en) 2023-03-02
US11680690B2 (en) 2023-06-20

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