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WO2019175914A1 - Bande d'éclairage et procédé de fabrication correspondant - Google Patents

Bande d'éclairage et procédé de fabrication correspondant Download PDF

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Publication number
WO2019175914A1
WO2019175914A1 PCT/IT2019/050057 IT2019050057W WO2019175914A1 WO 2019175914 A1 WO2019175914 A1 WO 2019175914A1 IT 2019050057 W IT2019050057 W IT 2019050057W WO 2019175914 A1 WO2019175914 A1 WO 2019175914A1
Authority
WO
WIPO (PCT)
Prior art keywords
support element
longitudinal support
folds
lighting strip
flexible longitudinal
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
PCT/IT2019/050057
Other languages
English (en)
Inventor
Edin DEDOVIC
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.)
Linea Light SRL
Original Assignee
Linea Light SRL
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 Linea Light SRL filed Critical Linea Light SRL
Priority to EP19717620.9A priority Critical patent/EP3765777B1/fr
Priority to ES19717620T priority patent/ES2934468T3/es
Publication of WO2019175914A1 publication Critical patent/WO2019175914A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • F21S4/22—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
    • 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
    • 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
    • F21S4/24—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 of ribbon or tape form, e.g. LED tapes

Definitions

  • Embodiments described here concern a lighting strip and the corresponding production method.
  • the invention is applied in particular in the field of lighting technology to produce lighting strips that support, on their length, light sources, for example but not only LEDs (Light Emitting Diodes).
  • Said strips can be applied to profiles, tables, panels, furnishing components in general, portions of walls, ceilings and false ceilings, and in other various applications, internal or external, where there is a desire to achieve particular aesthetic and/or focused and/or distributed lighting effects.
  • Lighting strips that can be used in the lighting technology and furnishing sector to produce points/zones of light distributed in specific portions of wall elements or furnishing components are known.
  • LED and OLED Organic LED
  • a lighting strip of this type normally consists of a longitudinal support, with a length greater than its width, made of normally flexible material on which a thin copper coating is applied, in a single or double layer, which creates the conductive track or tracks for the power supply of light sources.
  • This combination of flexible support and conductive coating forms a so-called PCB (Printed Circuit Board) on which the light sources, as well as the corresponding electrical/ electronic power supply and management components, are applied, and from which the light sources obtain the electric power supply.
  • PCB Print Circuit Board
  • a base made of rigid material is normally provided, which forms a stable support to correctly position the light sources and hold them in position, and guarantees the necessary mechanical seal of the strip as well as of the welds and electric connections.
  • the strip is coupled to a profile made of PVC or silicone, and the whole is then drowned in a resin, or similar material, which seals and defines the final shape of the strip.
  • This resin usually in silicone material, guarantees a high electrical insulation, making the strip applicable also outdoors.
  • US’786 describes a system to simulate neon light comprising an elongated guide provided with an external surface and a channel; a housing containing a coupling member and an area to receive the lighting device, and the lighting device.
  • the latter comprises a flexible printed circuit (FCB) and a plurality of LED lights attached to the FCB, and a plurality of electrical connectors all in contact with the power conductor.
  • FCB flexible printed circuit
  • WO’976 describes an LED module comprising a strip-shaped base element which comprises a strip- shaped printed circuit to which a plurality of LEDs is coupled, wherein the base element is flexible and can be plastically deformed.
  • the LED module described in WO’976 can be curved only with respect to the plane containing the base, possibly forming a helical coil, but cannot be curved with respect to a plane orthogonal thereto.
  • One purpose of the present invention is therefore to provide a lighting strip that increases the degree of flexibility and torsion with respect to known solutions, allowing it to be folded on several planes with respect to space, with wide degrees of freedom and without risks of breakage, seal of the welds, formation of cracks and interruptions, even only partial, of the electrical connections.
  • Another purpose of the present invention is to perfect a method to produce said strips which is in any case fast and economical, while at the same time guaranteeing that the advantages indicated above are obtained.
  • Another purpose is to obtain a lighting strip that can be folded on at least two planes, in which neither the correct optical emission of the light sources nor the continuity of the light and/or the correct maintenance of a regular and constant pitch between the light sources is compromised.
  • the purpose of the present invention is to obtain a lighting strip that can be bent/folded both on a plane transverse to a base surface of the strip, and also on the plane that contains the base surface itself, allowing to obtain a plurality of three-dimensional shapes.
  • the Applicant has devised, tested and embodied the present invention to overcome the shortcomings of the state of the art and to obtain these and other purposes and advantages.
  • a lighting strip according to the present invention comprises a longitudinal support element, made of flexible material, on a first side of which a coating of conductive material is applied, for example copper.
  • the support in flexible material is made of a flexible polymeric material.
  • the flexible support is at least partially made of Kapton.
  • the light sources for example of a point-shaped or substantially point-shaped type, are applied in pre-established positions, provided in the design of the lighting strip.
  • the light sources consist of LEDs or OLEDs, or another type of similar or comparable source.
  • Bases made of rigid material are associated with the flexible longitudinal support element in correspondence with the position of the light sources, on the opposite side with respect to the conductive coating, and define the correct positioning and guarantee the necessary mechanical seal for the light sources.
  • the lighting strip thus made formed by the longitudinal support element, the conductive coating, the light sources and the corresponding bases, is then normally applied to an open profile, for example but not necessarily made of flexible polymeric material, to define a substantially U-shaped or C-shaped shape, or other similar or comparable shape.
  • the flexible polymeric material can be, for example, PVC or silicone.
  • the strip Upon completion of the shaping procedure, the strip is then drowned in a cover, for example made of polyurethane resin or silicone, which closes the open profile, enclosing the light sources for the purpose of containment and protection and providing the final shape to the strip.
  • a cover for example made of polyurethane resin or silicone, which closes the open profile, enclosing the light sources for the purpose of containment and protection and providing the final shape to the strip.
  • the flexible longitudinal support element is made with a plurality of folds, or waves, which separate adjacent rectilinear segments.
  • the lighting strip is perfectly adaptable and moldable to follow even the most particular and complex shapes and profiles, for example an edge of a curvilinear furnishing component, also irregular, a profile of a shutter also folded at 90°, a profile of an internal or external wall, or whatever else required by the specific application.
  • the zones of the flexible support element which define the folds are smaller in width than the rectilinear segments on which the light sources and the bases are applied. Providing a smaller width for the folds allows to obtain greater folding flexibility of the lighting strip, thus allowing it to be bent and folded so as to form a circle or other curved shape, on a plane that contains all the rectilinear segments, or the base surface of the lighting strip.
  • the width of the folds is less than or equal to 50% of the width of the rectilinear segments.
  • the width of the folds is comprised between about 20% and about 50% of the width of the rectilinear segments.
  • This dimensional ratio allows to guarantee, with equal flexibility on two or more planes orthogonal to each other, both the mechanical resistance and also the electrical capacity required.
  • the flexible support element consists of a printed circuit board (PCB), which acts both as a power supply and as a command for the light sources.
  • PCB printed circuit board
  • the number of folds on the length of the longitudinal support element can be varied in relation to the level of foldability that is required for the lighting strip, this representing a first degree of freedom which, at the design stage, the lighting strip can take in relation to the intended application.
  • a further degree of freedom is the depth of each fold.
  • the depth of the folds is not constant on the length of the longitudinal support element, as it can be provided variable due to the desire to have a differentiated foldability/flexibility in different points of the longitudinal support element.
  • the frequency of the folds on the length of the longitudinal support element is not constant, also in this case to create zones of differentiated foldability/flexibility on the length of the longitudinal support element.
  • both the depth of the folds and their frequency are defined in the design step of the strip, in relation to the pitch that the LEDs must have in the final configuration of the strip itself, since the step of folding or puckering the longitudinal support element modifies the pitch between the LEDs and determines its final value.
  • the method to make the folds on the longitudinal support element provides to use a measuring instrument, for example a template, which allows to verify that the desired value of the pitch between the light sources which, following the formation of said folds, are brought closer to each other, has been achieved, in particular when two or more longitudinally spaced LEDs are present on each of the rigid bases.
  • a measuring instrument for example a template
  • At least one hole for the template can be present on each of the rigid bases so that bringing the bases closer to each other, with a consequent movement of the LEDs closer to each other, allows to keep the pitch between the light sources constant.
  • - fig. 1 shows a view from above of a lighting strip in accordance with a first embodiment
  • - fig. 2 is a longitudinal section according to A-A of fig. 1 ;
  • FIG. 3 is a schematic view of part of the lighting strip in an unassembled condition
  • - fig. 4 is a cross section according to B-B of fig. 1 ;
  • - fig. 5 is a variant of fig. 3 in a second embodiment
  • - fig. 6 is another variant of fig. 3 in a third embodiment
  • - fig. 7 is another variant of fig. 3 in a fourth embodiment
  • - fig. 8 is another variant of fig. 3 in a fifth embodiment
  • - fig. 9 is an enlarged view of part of fig. 2;
  • - fig. 10 is a possible example conformation that the lighting strip can take
  • - fig. 11 shows another possible example folded conformation on a first plane containing a lateral surface of the lighting strip
  • - fig. 12 shows a further possible example folded conformation on a second plane containing a base surface of the lighting strip.
  • the lighting strip 10 comprises a flexible longitudinal support element 11 (PCB).
  • the support element 11 is at least partly made with a flexible polymeric material.
  • the flexible longitudinal support element 11 comprises a thin strip of plastic material 16 (for example, but not only, Kapton or comparable or similar material) coated on one side by a thin conductive layer or coating 12, for example defining one or more copper conductive tracks.
  • plastic material 16 for example, but not only, Kapton or comparable or similar material
  • Bases 13 made of rigid material are associated, for example glued, with the flexible longitudinal support element 1 1, in positions distanced one from the other, in correspondence with which the assembly of the components, such as for example the light sources 14, point-shaped or substantially point-shaped, for example of the LED or OLED type, as well as the corresponding electrical/electronic power supply and management components, is provided.
  • the bases 13 are attached on a first surface of the flexible longitudinal support element 11, while the light sources 14 are attached on a second surface of the flexible longitudinal support element 11 , opposite the first surface.
  • the conductive layer 12 is applied on the second surface and allows the electrical supply to the light sources 14.
  • the flexible support element 1 1 consists of a strip of printed circuit board (PCB) and provides both the mechanical support and also the electrical connection for the light sources 14.
  • PCB printed circuit board
  • the bases 13 guarantee the necessary mechanical resistance and resistance of the welds, thus ensuring the seal of the assembled components on the flexible longitudinal support element 11 also in conditions of use of the lighting strip 10.
  • the flexible longitudinal support element 1 1 In an intermediate position between one base 13 of rigid material and the other, the flexible longitudinal support element 1 1 has longitudinally folds 15 or waves, which, once the production of the lighting strip 10 is completed as will be better explained below, allow the foldability and flexibility thereof in at least two planes in space, advantageously three, to achieve the functions of lighting strip 10 which can be molded in a three-dimensional direction according to the desired applications.
  • the folds 15 separate from each other adjacent rectilinear segments 24 of the flexible longitudinal support element 11, in which the bases 13 are attached.
  • the folds 15 in particular allow the lighting strip 10 to be folded both on a first plane containing a lateral surface 26 thereof (fig. 10), and also on a second plane containing a lower surface 25 thereof (fig. 1 1).
  • the folds 15 have a width Wl, smaller than the width W2 of the rectilinear segments 24.
  • the width W2 of the rectilinear segments can correspond to an average width of the bases 13 in a direction orthogonal to the longitudinal development of the flexible longitudinal support element 11.
  • the folds 15 have a width Wl less than or equal to 50% of the average width W2.
  • the folds 15 have a width W comprised between about 20% and about 50% of the average width WM.
  • the folds 15 are on the side of the light sources 14, their depth must be such as to not obscure or reduce the light beam emitted by the adjacent light sources 14, while guaranteeing an adequate flexibility and torsion capacity in space.
  • the depth of the folds 15 is such as to ensure that opposing edges of adjacent rectilinear segments 24 can be brought closer to each other, rotating them on a common lying plane.
  • the folds 15 in a folded condition have a length LI comprised between about 50% and about 90% of the length L2 which they have in their extended condition.
  • the folds 15 can be applied over the entire length of the flexible longitudinal support element 11, or only on a part thereof, according to the specific application of the lighting strip 10.
  • the folds 15, or waves all have the same depth on the length of the flexible longitudinal support element 11.
  • the folds 15, or waves have a variable depth on the length of the flexible longitudinal support element 11.
  • the assembly consisting of flexible longitudinal support element 11, already equipped with folds 15, rigid bases 13, and light sources 14 is inserted into a containing profile 17, for example made of PVC, silicone or similar or comparable flexible plastic material.
  • the containing profile 17 is also made of a flexible material such as to allow the shaping of the lighting strip 10 according to desired curvatures.
  • the containing profile 17 is, by way of example, square-shaped, depending on the final shape that the lighting strip 10 must take, with the understanding that other section shapes, for example visible in figs. 5 and 7, also not regular, are still possible.
  • the shape of the cross-section of the containing profile 17 can be obtained by appropriately folding the latter along its oblong development.
  • the presence of the folds 15 distributed along the length of the flexible longitudinal support element 1 1 gives the strip 10 the ability to twist and bend on two or more planes, in the specific case three planes, thus allowing the lighting strip 10 to be molded in a three-dimensional direction according to the specific applications.
  • the flexible longitudinal support element 11 and the bases 13 are each provided with a hole 22 for the application of a template (not shown).
  • a template not shown.
  • the action of the template on the holes 22 allows to shape the folds 15, by reciprocally bringing the bases 13, and therefore the light sources 14 mounted on adjacent bases 13, closer together. This allows to guarantee that the pitch P between all the light sources 14 of the strip 10 is kept constant.
  • the flexible longitudinal support element 11 is shown with the bases 13 applied in its shape without any folds 15, that is, completely extended.
  • the folds 15 have been made in the flexible longitudinal support element 11, which have caused the bases 13 to come closer together.
  • the reference number 19 indicates the electric cable that supplies power to the tracks of the conductive layer 12.
  • fig. 5 shows an embodiment similar to that of fig. 4, but in which the profile 17 has laterally ribs 19 for the recessed insertion of the lighting strip 10.
  • secondary optics 20 are inserted before or simultaneously with the application of the resin bath 18, which allow to concentrate/direct the light beam for various applications, for example for lighting facades, lighting plants, step-lighting, and more.
  • a respective cable 21 is provided, which allows the assembly of the strip 10 by laying, to create a stretched strip to be applied outdoors.
  • a rigid support element 23 is associated below the flexible longitudinal support element 1 1 and the bases 13, which gives them rigidity for particular applications.
  • Such rigid support element 23 can be defined by a metal sheet which extends the entire length of the flexible longitudinal support element 1 1 , and which rests thereon.
  • the present invention also concerns a method to produce a lighting strip 10 which comprises the steps of:
  • the resin containing and closing bath defines the cast of resin 18 or cover which incorporates the flexible longitudinal support element 1 1 , the light sources 14 and the bases 13 inside the containing profile 18.
  • the step of creating the folds 15 on the flexible longitudinal support element 11 provides to use a series of rollers to guide the flexible longitudinal support element 1 1 under a circular punching system.
  • a plurality of punches can be provided, each suitable to press on the portions of the flexible longitudinal support element 11 intermediate between the adjacent rectilinear segments 24, so as to form the folds 15.
  • the pitch of the folds 15 is determined by the distance between each single punch inserted in the circular system.

Landscapes

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

Abstract

Une bande d'éclairage qui comprend un élément de support longitudinal (11), en matériau souple, sur un premier côté duquel est appliqué un revêtement de matériau conducteur (12). La bande a, dans des positions préétablies, des sources de lumière (14) et des bases (13) constituées d'un matériau rigide en correspondance avec la position des sources de lumière (14), et a un profil de réception (17) et un couvercle (18).
PCT/IT2019/050057 2018-03-16 2019-03-15 Bande d'éclairage et procédé de fabrication correspondant Ceased WO2019175914A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19717620.9A EP3765777B1 (fr) 2018-03-16 2019-03-15 Bande d'éclairage et procédé de fabrication correspondant
ES19717620T ES2934468T3 (es) 2018-03-16 2019-03-15 Tira de iluminación y método de producción correspondiente

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102018000003694A IT201800003694A1 (it) 2018-03-16 2018-03-16 Striscia luminosa e relativo metodo di fabbricazione
IT102018000003694 2018-03-16

Publications (1)

Publication Number Publication Date
WO2019175914A1 true WO2019175914A1 (fr) 2019-09-19

Family

ID=62530437

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2019/050057 Ceased WO2019175914A1 (fr) 2018-03-16 2019-03-15 Bande d'éclairage et procédé de fabrication correspondant

Country Status (4)

Country Link
EP (1) EP3765777B1 (fr)
ES (1) ES2934468T3 (fr)
IT (1) IT201800003694A1 (fr)
WO (1) WO2019175914A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110966528A (zh) * 2019-12-09 2020-04-07 深圳市两岸光电科技有限公司 一种led柔性无光斑灯带
WO2021057322A1 (fr) * 2019-09-27 2021-04-01 王定锋 Carte de circuit imprimé stratifiée fabriquée par empilement d'une carte de circuit imprimé de lampe à del ondulée et d'une carte de circuit imprimé métallique, et procédé de fabrication
IT202100027629A1 (it) * 2021-10-28 2023-04-28 Linea Light S R L Striscia luminosa e relativo metodo di fabbricazione
CN117091113A (zh) * 2023-08-08 2023-11-21 广东微观科技有限公司 一种可折弯洗墙灯及其制作工艺
WO2025238328A1 (fr) * 2024-05-14 2025-11-20 L & Co Trading Ltd Ensemble d'éclairage et son profil

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003019506A1 (fr) * 2001-08-31 2003-03-06 Showers International Pty Ltd Dispositif d'enseigne lumineuse ou de presentoir lumineux et montage de dispositifs a circuits
DE202006006111U1 (de) * 2006-04-12 2006-06-14 Baars, Georg Hochflexibler Leuchtschlauch
DE102007023651A1 (de) * 2007-05-22 2008-11-27 Osram Gesellschaft mit beschränkter Haftung Beleuchtungseinrichtung, Hinterleuchtungsvorrichtung und Anzeigevorrichtung
WO2014026976A1 (fr) * 2012-08-14 2014-02-20 Osram Gmbh Module de del et procédé de fabrication d'un module de del
US20150176786A1 (en) * 2013-12-19 2015-06-25 Ge Lighting Solutions Llc Systems and methods for simulating neon lighting using light emitting diodes

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003019506A1 (fr) * 2001-08-31 2003-03-06 Showers International Pty Ltd Dispositif d'enseigne lumineuse ou de presentoir lumineux et montage de dispositifs a circuits
DE202006006111U1 (de) * 2006-04-12 2006-06-14 Baars, Georg Hochflexibler Leuchtschlauch
DE102007023651A1 (de) * 2007-05-22 2008-11-27 Osram Gesellschaft mit beschränkter Haftung Beleuchtungseinrichtung, Hinterleuchtungsvorrichtung und Anzeigevorrichtung
WO2014026976A1 (fr) * 2012-08-14 2014-02-20 Osram Gmbh Module de del et procédé de fabrication d'un module de del
US20150176786A1 (en) * 2013-12-19 2015-06-25 Ge Lighting Solutions Llc Systems and methods for simulating neon lighting using light emitting diodes

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021057322A1 (fr) * 2019-09-27 2021-04-01 王定锋 Carte de circuit imprimé stratifiée fabriquée par empilement d'une carte de circuit imprimé de lampe à del ondulée et d'une carte de circuit imprimé métallique, et procédé de fabrication
CN110966528A (zh) * 2019-12-09 2020-04-07 深圳市两岸光电科技有限公司 一种led柔性无光斑灯带
CN110966528B (zh) * 2019-12-09 2022-07-26 深圳市两岸光电科技有限公司 一种led柔性无光斑灯带
IT202100027629A1 (it) * 2021-10-28 2023-04-28 Linea Light S R L Striscia luminosa e relativo metodo di fabbricazione
EP4174363A1 (fr) 2021-10-28 2023-05-03 Linea Light S.R.L. Bande lumineuse et procédé de fabrication correspondant
CN117091113A (zh) * 2023-08-08 2023-11-21 广东微观科技有限公司 一种可折弯洗墙灯及其制作工艺
CN117091113B (zh) * 2023-08-08 2024-05-14 广东微观科技有限公司 一种可折弯洗墙灯及其制作工艺
WO2025238328A1 (fr) * 2024-05-14 2025-11-20 L & Co Trading Ltd Ensemble d'éclairage et son profil

Also Published As

Publication number Publication date
ES2934468T3 (es) 2023-02-22
EP3765777B1 (fr) 2022-11-09
IT201800003694A1 (it) 2019-09-16
EP3765777A1 (fr) 2021-01-20

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