WO2016174626A1 - Dispositif d'éclairage en forme de bande comprenant des sources électroluminescentes ponctuelles, pourvu d'un moyen conçu pour commander les mouvements d'allongement et de torsion de ladite bande - Google Patents

Dispositif d'éclairage en forme de bande comprenant des sources électroluminescentes ponctuelles, pourvu d'un moyen conçu pour commander les mouvements d'allongement et de torsion de ladite bande Download PDF

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Publication number
WO2016174626A1
WO2016174626A1 PCT/IB2016/052441 IB2016052441W WO2016174626A1 WO 2016174626 A1 WO2016174626 A1 WO 2016174626A1 IB 2016052441 W IB2016052441 W IB 2016052441W WO 2016174626 A1 WO2016174626 A1 WO 2016174626A1
Authority
WO
WIPO (PCT)
Prior art keywords
elongated body
light emitting
point light
rigid
printed circuit
Prior art date
Application number
PCT/IB2016/052441
Other languages
English (en)
Inventor
Massimo Gattari
Original Assignee
Iguzzini Illuminazione S.P.A.
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 Iguzzini Illuminazione S.P.A. filed Critical Iguzzini Illuminazione S.P.A.
Priority to ES16728375T priority Critical patent/ES2741805T3/es
Priority to EP16728375.3A priority patent/EP3292349B1/fr
Priority to CN201680031837.XA priority patent/CN107980087B/zh
Publication of WO2016174626A1 publication Critical patent/WO2016174626A1/fr

Links

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
    • F21V15/00—Protecting lighting devices from damage
    • 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
    • F21S4/22—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports flexible or deformable, e.g. into a curved shape
    • 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
    • F21V15/00—Protecting lighting devices from damage
    • F21V15/01—Housings, e.g. material or assembling of housing parts
    • F21V15/013—Housings, e.g. material or assembling of housing parts the housing being an extrusion
    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/06—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
    • F21V3/062—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being plastics
    • F21V3/0625—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being plastics the material diffusing light, e.g. translucent plastics
    • 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
    • F21Y2101/00—Point-like light sources
    • 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 the field of lighting devices comprising point-type lighting source, such as LEDs (Light Emitting Diodes) and the like.
  • the present invention relates to the field of lighting devices comprising point-type lighting source of the LED strip type.
  • the so-called LED strips are lighting devices comprising approximately tubular sheaths made of a flexible material, e.g. silicone plastic material or polyurethane resin, within which a plurality of LEDs is housed.
  • a flexible material e.g. silicone plastic material or polyurethane resin
  • Said LEDs are usually mounted on a printed circuit, which is also flexible, together with possible configuration circuits and are further connected to power supply wiring, which is normally accessible from one of the ends of the strip and connectable to external power supply means, typically power supplies which output 12V or 24V voltages.
  • the LEDs of the strip may be of a single color or different colors or changing colors within a given color range.
  • the mechanical and electrical structure of these LED lighting sources may make them suited to be cut to size by the user without compromising the operation thereof, and thus allows to obtain a high flexibility in choosing the length of said LED strips to be made and industrially produced.
  • the material of which the strip is made is translucent, at least on the front part, so as to let through the light emission of said LEDs.
  • said LED strips are generally provided with fixing means to a wall, comprising holes or slots adapted to accommodate anchoring screws or the like, or an adhesive layer applied on the strip face opposite to that of the light emission.
  • the LED strip complete with sheath and internal flexible printed circuit, is generally cut to size when flat and then curved during installation.
  • the printed circuit and the sheath which houses it do not curve in the same manner, thus maintaining the same reciprocal position, but instead slide with respect to each other.
  • the center of gravity of the sheath defined as the geometric locus of the centers of gravity of the sheath sections
  • the center of gravity of the internal printed circuit are distinct and spaced apart and such as to rest on two different radii of curvature when bending the LED strip.
  • the curvature of the strip When the curvature of the strip is such that the radius of curvature related to the center of gravity of the sheath is greater than the radius of curvature related to the center of gravity of the printed circuit, then the printed circuit tends to protrude from the edges; in contrast, when the curvature of the strip is such that the radius of curvature related to the center of gravity of the sheath is smaller than the radius of curvature related to the center of gravity of the printed circuit, then it is the sheath which tends to protrude with respect to the printed circuit.
  • said LED strips must be used for long length installations, they are often made in two parts to be installed separately: a first part, comprising the LED devices, adapted to be fixed to a support, a wall, a cornice, etc., and a second part comprising an open sheath with forms a semi-transparent covering adapted to diffuse the light beams emitted by the LED devices.
  • the part adapted to be fixed to a support may consist of a plurality of printed circuits, housing the LED devices and the respective power supply circuits and connected together by means of respective wiring.
  • the sheath may be made as a single piece, so as not to create joints between multiple parts which could make the appearance of the LED strip less pleasant and deteriorate the emitted light beam creating lack of uniformity and unevenness.
  • Silicone materials which offer the required qualities of flexibility, robustness and UV ray resistance, are often chosen in order to provide a sheath of this type.
  • the problem which occurs in these cases is related to the different deformations that the different parts of the LED strip undergo because of the temperature changes to which they are subjected.
  • the part adapted to be fixed to a support and the related outer sheath comprise mutually different materials having thermal expansion coefficients which may be very different.
  • Fig. 1 shows a section of a first preferred embodiment of the LED strip according to the present invention
  • Fig. 2 shows a section of a second preferred embodiment of the LED strip according to the present invention
  • Fig. 3 shows a section of a third preferred embodiment of the LED strip according to the present invention.
  • the LED strip comprises an elongated body 10 comprising, in turn, an inner compartment 1 1 adapted to house a printed circuit 12 or similar support for LED devices 13 or for similar point light emitting devices.
  • a first preferred embodiment of the present invention comprises a strip-shaped lighting device comprising an elongated body 10 comprising, in turn, an inner compartment 1 1 adapted to house a support for point light emitting devices 13, e.g. a printed circuit 12 preferably of flexible type.
  • Said elongated body 10 comprises an upper part adapted to diffuse the light emitted by said point light emitting devices 13.
  • Said point light emitting devices 13 may consist of light emitting diodes (LED).
  • said elongated body 10 advantageously comprises at least one rigid, flexible element which is integral with said elongated body 10 and arranged over the whole length of said elongated body 10 at the printed circuit on which the point light emitting devices 13 are mounted.
  • Said rigid, flexible element preferably consists of at least one rigid wire 15 made of steel or other similar material which offers features of high flexibility and robustness, together with the possibility of being made with even very small diameters.
  • Said rigid, flexible element is preferably arranged inside said elongated body 10 and integrally constrained thereto.
  • Said rigid, flexible element may be inserted, for example, inside said elongated body 10 during the extrusion process thereof or later inserted into a specific cavity made in said elongated body 10 and then appropriately glued so as to constrain it integrally and irreversibly to said elongated body 10.
  • said rigid, flexible element in said elongated body 10 and at the printed circuit 12 constrains the neutral axis of the sheath approximately at the printed circuit so as to avoid traction or compression stresses on the printed circuit itself due to the curvatures and torsions that the LED strip undergoes.
  • said rigid, flexible element which is rigidly integral with said elongated body 10 will allow said elongated body 10 and said printed circuit 12 to follow always corresponding curvatures such that said elongated body 10 cannot apply undesired stresses on said printed circuit 12 by virtue of different curvatures and tractions that it undergoes with respect to the curvatures and tractions that said printed circuit 12 undergoes.
  • said body 10 has a section tapering towards the bottom comprising an inner compartment 1 1 adapted to house the printed circuit 12.
  • the front part of said elongated body 10, adapted to emit the light radiation of the LEDs 13 has a quasi-triangular cross section which departs from said inner compartment to ensure the desired amount of light emission.
  • said rigid, flexible element is preferably obtained by means of a single rigid steel wire 15 arranged at the bottom of said elongated body 10 and aligned with said printed circuit 12.
  • the preferred embodiment of the present invention shown in accompanying figure 2 comprises a section of substantially rectangular or trapezoidal shape, the rear part of which comprises an inner compartment 1 1 adapted to house the printed circuit 12.
  • an inner compartment 1 1 adapted to house the printed circuit 12.
  • two grooves are present on the walls of said inner compartment, adapted to house the ends of the printed circuit 12.
  • the front part of said elongated body 10, adapted to emit the light radiation of the LEDs 13, has a trapezoidal cross section which departs from said inner compartment to ensure the desired amount of light emission.
  • said rigid, flexible element preferably consists of a pair of rigid steel wires 15 arranged inside said elongated body 10 by the sides of said printed circuit 12 and aligned therewith.
  • a third preferred embodiment of the present invention comprises an elongated body 10, in turn comprising two separate parts provided with reciprocal engagement means: a base 17 and a cover 16 which delimit an inner compartment 1 1 adapted to house the printed circuit 12.
  • Said base 17 is provided with fixing means to a support, e.g. a wall, a cornice, etc.
  • Said cover 16 is made of a material adapted to diffuse the light emitted by the point light emitting devices 13 mounted on said printed circuit 12.
  • the reciprocal engagement means between base 17 and cover 16 could advantageously consist of a pair of teeth 18, 19.
  • said rigid, flexible element preferably consists of a pair of rigid wires 15 arranged inside said cover 16 by the sides of said printed circuit 12 and substantially aligned therewith.
  • the elongated body 10 of the strip-shaped lighting device may consist of extrudates of appropriate material.
  • the cover 16 of said elongated body 10 may consist of an element or a plurality of elements made of a silicone plastic material extrudate appropriately treated so as to enhance its light radiation transmission properties and may be either transparent or opaque.
  • the base 17 of said elongated body 10 may consist of an element or a plurality of elements made of a metal material extrudate, e.g. aluminum, so as to ensure the required consistency and offer the possibility of rigid fixing to a support, such as for example a wall.
  • the thermal expansion coefficients of the cover 16 and the base 17 of said elongated body 10 are very different. Considering the aforesaid examples, it occurs that aluminum, and thus said base 17, has a thermal expansion coefficient of about 23 * 10 "6 m/°C, while said silicone plastic material cover 16 has a thermal expansion coefficient of about 146 * 10 6 m/°C.
  • said rigid, flexible element preferably consisting of a pair of rigid steel wires 15, arranged inside said cover 16 by the sides of said printed circuit 12 and substantially aligned therewith, it occurs that the thermal deformation of said cover 16, integrally associated with said rigid steel wires 15, is controlled and limited by said rigid steel wires 15.

Landscapes

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

Abstract

Une bande de DEL comprenant une gaine conçue de manière à permettre une flexion de manière à ne pas contraindre la carte de circuit imprimé interne logeant les dispositifs à DEL avec des tractions ou des extensions indésirables de manière à assurer le bon fonctionnement, même en cas de contraintes et de changements de température considérables. La bande de DEL comprend un corps allongé (10) comprenant, à son tour, un compartiment interne (11) conçu pour loger un support pour dispositifs électroluminescents ponctuels (13), ledit corps allongé (10) comprenant une partie supérieure conçue pour diffuser la lumière émise par lesdits dispositifs électroluminescents ponctuels (13), et comprenant en outre au moins un élément flexible (15) agencé à l'intérieur dudit corps allongé (10) et solidaire de celui-ci, dans une position à côté dudit support pour dispositifs électroluminescents ponctuels (13).
PCT/IB2016/052441 2015-04-29 2016-04-29 Dispositif d'éclairage en forme de bande comprenant des sources électroluminescentes ponctuelles, pourvu d'un moyen conçu pour commander les mouvements d'allongement et de torsion de ladite bande WO2016174626A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES16728375T ES2741805T3 (es) 2015-04-29 2016-04-29 Dispositivo de iluminación en forma de tira que comprende fuentes de emisión de luz puntual, provistos de medios adaptados para controlar los movimientos de alargamiento y torsión de dicha tira
EP16728375.3A EP3292349B1 (fr) 2015-04-29 2016-04-29 Dispositif d'éclairage en forme de bande comprenant sources lumineuses punctuelles, avec des moyens pour contrôler l'allongement et la torsion des mouvements de cette bande
CN201680031837.XA CN107980087B (zh) 2015-04-29 2016-04-29 设有适于控制带的延伸和扭转运动的装置的包括点发光源的带状照明设备

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102015000013480 2015-04-29
ITUB20150222 2015-04-29

Publications (1)

Publication Number Publication Date
WO2016174626A1 true WO2016174626A1 (fr) 2016-11-03

Family

ID=53765390

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2016/052441 WO2016174626A1 (fr) 2015-04-29 2016-04-29 Dispositif d'éclairage en forme de bande comprenant des sources électroluminescentes ponctuelles, pourvu d'un moyen conçu pour commander les mouvements d'allongement et de torsion de ladite bande

Country Status (4)

Country Link
EP (1) EP3292349B1 (fr)
CN (1) CN107980087B (fr)
ES (1) ES2741805T3 (fr)
WO (1) WO2016174626A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202022103332U1 (de) 2022-06-14 2022-06-23 Aspöck Systems GmbH Streifenförmige Beleuchtungsvorrichtung und Elastomerprofil dafür und damit gebildetes Beleuchtungssystem

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20107247U1 (de) * 2001-04-26 2001-08-16 Aqua Signal Ag Leuchte mit Explosions-Schutz
US6354714B1 (en) * 2000-04-04 2002-03-12 Michael Rhodes Embedded led lighting system
US20030081416A1 (en) * 2001-10-31 2003-05-01 Hsu Yen Chuan Structure of tube lamp
WO2011110217A1 (fr) * 2010-03-09 2011-09-15 Tri-O-Light Bv Bande lumineuse
EP2447031A1 (fr) * 2010-10-28 2012-05-02 Posa S.P.A. Éléments d'éclairage flexibles dans un seul corps
EP2505906A2 (fr) * 2011-03-30 2012-10-03 W. Döllken & Co. GmbH Procédé de fabrication d'une lampe à base de DEL
WO2014026976A1 (fr) * 2012-08-14 2014-02-20 Osram Gmbh Module de del et procédé de fabrication d'un module de del

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007528096A (ja) * 2003-06-17 2007-10-04 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ エンベロープ部及びキャップ部を有するランプ
CN202109289U (zh) * 2011-07-07 2012-01-11 黄庆彬 一种带有粗糙面的装饰灯带
CN203718471U (zh) * 2013-12-03 2014-07-16 重庆恩纬西实业发展有限公司 线条灯的灯体组件

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6354714B1 (en) * 2000-04-04 2002-03-12 Michael Rhodes Embedded led lighting system
DE20107247U1 (de) * 2001-04-26 2001-08-16 Aqua Signal Ag Leuchte mit Explosions-Schutz
US20030081416A1 (en) * 2001-10-31 2003-05-01 Hsu Yen Chuan Structure of tube lamp
WO2011110217A1 (fr) * 2010-03-09 2011-09-15 Tri-O-Light Bv Bande lumineuse
EP2447031A1 (fr) * 2010-10-28 2012-05-02 Posa S.P.A. Éléments d'éclairage flexibles dans un seul corps
EP2505906A2 (fr) * 2011-03-30 2012-10-03 W. Döllken & Co. GmbH Procédé de fabrication d'une lampe à base de DEL
WO2014026976A1 (fr) * 2012-08-14 2014-02-20 Osram Gmbh Module de del et procédé de fabrication d'un module de del

Also Published As

Publication number Publication date
EP3292349B1 (fr) 2019-06-05
CN107980087B (zh) 2020-11-13
CN107980087A (zh) 2018-05-01
ES2741805T3 (es) 2020-02-12
EP3292349A1 (fr) 2018-03-14

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