WO2014001112A1 - Flexible strip-shaped circuit board with leds - Google Patents

Flexible strip-shaped circuit board with leds Download PDF

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Publication number
WO2014001112A1
WO2014001112A1 PCT/EP2013/062448 EP2013062448W WO2014001112A1 WO 2014001112 A1 WO2014001112 A1 WO 2014001112A1 EP 2013062448 W EP2013062448 W EP 2013062448W WO 2014001112 A1 WO2014001112 A1 WO 2014001112A1
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WO
WIPO (PCT)
Prior art keywords
diffuser
circuit board
light band
conductor strip
printed circuit
Prior art date
Application number
PCT/EP2013/062448
Other languages
German (de)
French (fr)
Inventor
Tobias Staeber
Steffen Strauss
Original Assignee
Osram Gmbh
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 Osram Gmbh filed Critical Osram Gmbh
Publication of WO2014001112A1 publication Critical patent/WO2014001112A1/en

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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
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/16—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting
    • F21V17/164—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting the parts being subjected to bending, e.g. snap joints
    • 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
    • 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 is based on a light strip, which has a fitted with LEDs flexible strip-shaped circuit board.
  • Prior Art Documents US 2010/0061095 A1 discloses an LED strip light consisting of a flexible printed circuit board with LEDs and a cylindrical shell into which the flexible printed circuit board is inserted. After inserting the circuit board, the envelope is closed by a one-piece formed on her closure. The shell then completely surrounds the printed circuit board and serves for the simplified storage and installation of the light strip. About the shell, a diffusion of the light emitted by the LEDs light is achieved.
  • Document WO 2005/106320 Al discloses an LED light band, which is similar to the above-described light band. It has a flexible PCB with LEDs and a flexible cylindrical shell into which the circuit board is inserted. About the shell that surrounds the circuit board in the fully assembled state, a diffusion of the emitted light is achieved.
  • the object of the present invention is to provide a light strip with flexible strip-shaped printed circuit board with LEDs, which has a device-simple diffuser.
  • This object is achieved by a light band with a flexible strip-shaped printed circuit board or with a conductor strip whose surface is equipped with a plurality of LEDs. On this surface, a diffuser is arranged, which covers the LEDs.
  • the underside of the printed circuit board or of the conductor strip is at least partially formed without covering by the diffuser, so that the device-technical effort for the diffuser is reduced.
  • the diffuser has two lateral edge regions over which it is attached to the two side edges of the conductor plate or the conductor strip. As a result, the diffuser covers the surface of the printed circuit board or the conductor strip in its entire width.
  • the attachment is preferably designed such that the edge regions of the diffuser embrace the respective side edge of the printed circuit board or of the conductor strip and thus engage behind the printed circuit board or the conductor strip.
  • the diffuser due to its flexibility simply on the circuit board or over the Conductor be slipped or pulled, creating a secure and releasable attachment is created.
  • the printed circuit board or the conductor strip between the two edge regions be clamped.
  • the diffuser is attached to the circuit board over the entire length thereof.
  • the diffuser has a substantially unchanged cross-section over its length. If the LEDs are fastened along a central longitudinal axis of the printed circuit board or the conductor strip on this, it is preferable that the diffuser has a substantially symmetrical shape to the central longitudinal axis. Then the light is radiated symmetrically from the light band according to the invention.
  • one or more - preferably metallic - brackets may be provided on the underside of the printed circuit board or the conductor strip over which the edge regions of the diffuser in the direction of the side edges of the circuit board or the conductor band are stretched.
  • the at least one clip has a substantially symmetrical to the central longitudinal axis of the light band shape.
  • the at least one clip preferably has a planar section, which is arranged approximately parallel to the printed circuit board or to the conductor strip.
  • fastening means may be arranged. These can be, for example through holes and screws.
  • a preferred development has exactly one clip, which has a substantially unchanged cross section over its length. It is preferred if the light band according to the invention is mounted or used without significant deflection as a light string.
  • the underside of the printed circuit board or of the conductor strip may also remain free, so that the underside of the printed circuit board or of the conductor strip forms an outer side of the light band.
  • the diffuser viewed in cross-section may, on its outer side facing away from the printed circuit board or from the conductor strip, be convex, in particular, spherically-curved.
  • the diffuser can be used as a lens and the emission characteristics of the LEDS can be adjusted.
  • the diffuser may be curved concavely, in particular spherically, on its inner side facing the printed circuit board or the conductor strip, as an alternative or in addition in cross-section. This allows the diffuser to be used as a lens and the emission characteristics of the LEDS are adjusted.
  • the domed interior may be spaced apart from the LEDs.
  • the diffuser comprises silicone or it is filled or coated with phosphor (for example phosphorus).
  • the entire light band according to the invention is designed mirror-symmetrically to a central longitudinal plane. Then the light band can be installed and fixed with any orientation to its intended location.
  • the diffuser can be neutral in color or color.
  • FIG. 1 shows a first embodiment of the light band according to the invention in cross section.
  • Fig. 2 shows a second embodiment of the light strip according to the invention in cross section.
  • Figure 1 shows a first embodiment of a light band according to the invention in cross section. It is mirror-symmetrical with respect to a central longitudinal plane 2.
  • the light band has a serving as a printed circuit board flexible conductor strip 1, whose width is shown in Figure 1, and whose length may be several meters.
  • a plurality of LEDs 6 is arranged, which extend in a row along the surface 4, and of which in Figure 1, only one LED 6 is shown.
  • the LEDs 6 and the surface 4 of the conductor strip 1 are covered with a band made of silicone.
  • the diffuser 8 has a concave curved inner side 10 facing the conductor strip 1 and a convexly curved outer side 12.
  • the laterally along the two side edges 14 of the conductor strip 1 extending edge portions 16 of the diffuser 8 each have a bead-like encompassing portion 18 whose distance from each other is less than the width of the conductor strip 1.
  • the portions 18 surround the side edges 14 of the conductor strip 1 and engage behind The conductor strip 1.
  • the elasticity of the silicone from which the diffuser 8 is made can be used to provide the two edge portions 16 and in particular the two encompassing portions 18 with a clamping force, respectively in the direction of the longitudinal plane 2 of the light strip according to the invention is directed. This can be done in an unassembled state of the diffuser 8, the inner spacing of the two edge regions 16 and in particular the inner spacing of the two bead-like sections 18 be less than the width of the conductor strip 1.
  • Figure 2 shows a second embodiment of the light band according to the invention in cross section.
  • a diffuser 108 is provided, which is shaped in a (not shown) unassembled state similar to the diffuser 8 of the first embodiment.
  • edge regions 116 and in particular the bead-like encompassing portions 18 of the diffuser 108 are clamped by a clamp 20 against the two side edges 14 of the conductor strip 1.
  • the clamp 20 has a flat portion 24, which runs approximately parallel to an underside 28 of the conductor strip 1 and is wider than the conductor strip 1.
  • the bracket 20 has two clamping portions 26 which are formed (in the cross section shown in Figure 2) S-shaped. The clamping portions 26 each form free space for one of the two encompassing portions 18 and press the respective edge region 116 of the diffuser 108 against the respective side edge 14 of the conductor strip 1.
  • the diffuser 108 in the transition region from its main portion to the respective edge region 116 in the direction of the longitudinal plane 2 pressed. This deformation does not affect the outside 112 of the diffuser 108 over which the Light of the LEDs 6 to the outside (in Figure 2 largely upwards) is emitted.
  • the bracket 20 In the planar portion 24 of the bracket 20 at least one through-hole is arranged, in which a screw 22 is inserted. About this screw 22, the clamp 20 is attached to its intended location. For a secure attachment of the second embodiment of the light strip according to the invention is ensured. Furthermore, the clamping portions 26 of the bracket 20 reinforce the support of the diffuser 108 on the conductor strip. 1
  • Both embodiments of the light band according to the invention can be bent along the plane 2 (in the figures up and down), as the conductor strip 1 and the diffuser 8; 108 are flexible.
  • the bending direction along the main emission direction of the light and is directed transversely to the conductor strip 1 (in the figures up and down).
  • Both embodiments of the light band according to the invention are symmetrical to the longitudinal plane. 2

Abstract

The invention discloses a light strip with a flexible strip-shaped circuit board or with a conductor strip, the surface of which is equipped with a plurality of LEDs. A flexible diffuser, which covers the LEDs and preferably the entire surface, is arranged on said surface of the circuit board or conductor strip. The underside of the circuit board or the conductor strip is formed at least in sections by the diffuser without covering.

Description

Beschreibung  description
Flexible streifenförmige Leiterplatte mit LEDs Flexible strip-shaped printed circuit board with LEDs
Technisches Gebiet Technical area
Die Erfindung geht aus von einem Lichtband, das eine mit LEDs bestückte flexible streifenförmige Leiterplatte aufweist . The invention is based on a light strip, which has a fitted with LEDs flexible strip-shaped circuit board.
Stand der Technik Dokumente US 2010/0061095 AI offenbart ein LED-Lichtband, das aus einer eine flexible Leiterplatte mit LEDs besteht, und eine zylindrische Hülle hat, in die die flexible Leiterplatte eingesetzt wird. Nach dem Einsetzten der Leiterplatte wird die Hülle über einen einstückig an ihr ausgebildeten Verschluss verschlossen. Die Hülle umgibt die Leiterplatte dann vollumfänglich und dient der vereinfachten Lagerung und Montage des Lichtbandes. Über die Hülle wird eine Diffusion des von den LEDs abgestrahlten Lichts erreicht. Dokument WO 2005/106320 AI offenbart ein LED-Lichtband, das dem vorbeschriebenen Lichtband ähnlich ist. Es hat eine flexible Leiterplatte mit LEDs und eine flexible zylindrische Hülle, in die die Leiterplatte eingesetzt wird. Über die Hülle, die die Leiterplatte im fertig montierten Zustand vollumfänglich umgibt, wird eine Diffusion des abgestrahlten Lichts erreicht. Prior Art Documents US 2010/0061095 A1 discloses an LED strip light consisting of a flexible printed circuit board with LEDs and a cylindrical shell into which the flexible printed circuit board is inserted. After inserting the circuit board, the envelope is closed by a one-piece formed on her closure. The shell then completely surrounds the printed circuit board and serves for the simplified storage and installation of the light strip. About the shell, a diffusion of the light emitted by the LEDs light is achieved. Document WO 2005/106320 Al discloses an LED light band, which is similar to the above-described light band. It has a flexible PCB with LEDs and a flexible cylindrical shell into which the circuit board is inserted. About the shell that surrounds the circuit board in the fully assembled state, a diffusion of the emitted light is achieved.
Nachteilig an den beiden genannten Lichtbändern gemäß dem Stand der Technik ist der vorrichtungstechnische Aufwand, der sich aus der vollumfänglich gestalteten Hülle ergibt. Darstellung der Erfindung A disadvantage of the two mentioned light bands according to the prior art, the device-technical complexity, resulting from the fully designed envelope. Presentation of the invention
Die Aufgabe der vorliegenden Erfindung ist es, ein Lichtband mit flexibler streifenförmiger Leiterplatte mit LEDs zu schaffen, das einen vorrichtungstechnisch einfachen Diffusor aufweist. Diese Aufgabe wird gelöst durch ein Lichtband mit einer flexiblen streifenförmigen Leiterplatte oder mit einem Leiterband, deren bzw. dessen Oberfläche mit einer Mehrzahl von LEDs bestückt ist. An dieser Oberfläche ist ein Diffusor angeordnet, der die LEDs überdeckt. Dabei ist die Unterseite der Leiterplatte bzw. des Leiterbandes zumindest abschnittsweise ohne Abdeckung durch den Diffusor ausgebildet, so dass der vorrichtungstechnische Aufwand für den Diffusor verringert ist. The object of the present invention is to provide a light strip with flexible strip-shaped printed circuit board with LEDs, which has a device-simple diffuser. This object is achieved by a light band with a flexible strip-shaped printed circuit board or with a conductor strip whose surface is equipped with a plurality of LEDs. On this surface, a diffuser is arranged, which covers the LEDs. In this case, the underside of the printed circuit board or of the conductor strip is at least partially formed without covering by the diffuser, so that the device-technical effort for the diffuser is reduced.
Besonders vorteilhafte Ausgestaltungen finden sich in den abhängigen Ansprüchen. Particularly advantageous embodiments can be found in the dependent claims.
Bei einer besonders bevorzugten Weiterbildung des erfindungsgemäßen Lichtbandes hat der Diffusor zwei seitliche Randbereiche, über die er an den beiden Seiterändern der Leiterpatte bzw. des Leiterbandes befestigt ist. Dadurch überdeckt der Diffusor die Oberfläche der Leiterplatte bzw. des Leiterbandes in ihrer gesamten Breite. In a particularly preferred embodiment of the light strip according to the invention, the diffuser has two lateral edge regions over which it is attached to the two side edges of the conductor plate or the conductor strip. As a result, the diffuser covers the surface of the printed circuit board or the conductor strip in its entire width.
Die Befestigung ist vorzugsweise derart ausgestaltet, dass die Randbereiche des Diffusors den jeweiligen Seitenrand der Leiterplatte bzw. des Leiterbandes umgreifen und damit die Leiterplatte bzw. das Leiterband hintergreifen. Somit kann der Diffusor auf Grund seiner Flexibilität einfach über die Leiterplatte bzw. über das Leiterband gestülpt bzw. gezogen werden, wodurch eine sichere und lösbare Befestigung geschaffen ist. The attachment is preferably designed such that the edge regions of the diffuser embrace the respective side edge of the printed circuit board or of the conductor strip and thus engage behind the printed circuit board or the conductor strip. Thus, the diffuser due to its flexibility simply on the circuit board or over the Conductor be slipped or pulled, creating a secure and releasable attachment is created.
Dabei kann die Leiterplatte bzw. das Leiterband zwischen den beiden Randbereichen eingespannt sein. Wenn sich die Randbereiche entlang des gesamten Lichtbands erstrecken, ist der Diffusor über seine gesamte Länge an der Leiterplatte bzw. am Leiterband befestigt. In this case, the printed circuit board or the conductor strip between the two edge regions be clamped. As the edge portions extend along the entire band of light, the diffuser is attached to the circuit board over the entire length thereof.
Vorzugsweise weist der Diffusor über seine Länge einen im Wesentlichen unveränderten Querschnitt auf. Wenn die LEDs entlang einer Mittellängsachse der Leiterplatte bzw. des Leiterbandes auf dieser befestigt sind, wird es bevorzugt der Diffusor eine zur Mittellängsachse im Wesentlichen symmetrische Form hat. Dann wird das Licht vom erfindungsgemäßen Lichtband symmetrisch abgestrahlt. Preferably, the diffuser has a substantially unchanged cross-section over its length. If the LEDs are fastened along a central longitudinal axis of the printed circuit board or the conductor strip on this, it is preferable that the diffuser has a substantially symmetrical shape to the central longitudinal axis. Then the light is radiated symmetrically from the light band according to the invention.
Um eine besonders sichere Befestigung des Diffusors an der Leiterplatte bzw. am Leiterband zu erreichen, kann eine oder mehrere - vorzugsweise metallische - Klammern an der Unterseite des Leiterplatte bzw. des Leiterbandes vorgesehen sein, über die die Randbereiche des Diffusor in Richtung der Seitenränder der Leiterplatte bzw. des Leiterbandes gespannt werden. In order to achieve a particularly secure attachment of the diffuser to the circuit board or the conductor strip, one or more - preferably metallic - brackets may be provided on the underside of the printed circuit board or the conductor strip over which the edge regions of the diffuser in the direction of the side edges of the circuit board or the conductor band are stretched.
Vorzugsweise hat auch die zumindest eine Klammer eine zur Mittellängsachse des Lichtbandes im Wesentlichen symmetrische Form. Dabei weist die zumindest eine Klammer vorzugsweise einen flächigen Abschnitt auf, der etwa parallel zur Leiterplatte bzw. zum Leiterband angeordnet ist. An diesem Abschnitt können Befestigungsmittel angeordnet sein. Diese können z.B. Durchgangsausnehmungen und Schrauben sein. Preferably, the at least one clip has a substantially symmetrical to the central longitudinal axis of the light band shape. In this case, the at least one clip preferably has a planar section, which is arranged approximately parallel to the printed circuit board or to the conductor strip. At this section fastening means may be arranged. These can be, for example through holes and screws.
Eine bevorzugte Weiterbildung hat genau eine Klammer, die über ihre Länge einen im Wesentlichen unveränderten Querschnitt aufweist. Dabei wird es bevorzugt wenn das erfindungsgemäße Lichtband ohne Wesentliche Verbiegung als Lichtstrang montiert bzw. verwendet wird. A preferred development has exactly one clip, which has a substantially unchanged cross section over its length. It is preferred if the light band according to the invention is mounted or used without significant deflection as a light string.
Alternativ zu der zumindest eine Klammer kann die Unterseite der Leiterplatte bzw. des Leiterbandes auch frei bleiben, so dass die Unterseite der Leiterplatte bzw. des Leiterbandes eine Außenseite des Lichtbandes bildet . As an alternative to the at least one clip, the underside of the printed circuit board or of the conductor strip may also remain free, so that the underside of the printed circuit board or of the conductor strip forms an outer side of the light band.
Um optische Effekte zu erzielen kann der Diffusor im Querschnitt betrachtet an seiner von der Leiterplatte bzw. vom Leiterband abgewandten Außenseite konvex insbesondere sphärisch - gewölbt sein. Damit kann der Diffusor als Linse verwendet werden und die Abstrahlcharakteristik der LEDS eingestellt werden. In order to achieve optical effects, the diffuser viewed in cross-section may, on its outer side facing away from the printed circuit board or from the conductor strip, be convex, in particular, spherically-curved. Thus, the diffuser can be used as a lens and the emission characteristics of the LEDS can be adjusted.
Um optische Effekte zu erzielen kann der Diffusor alternativ oder in Ergänzung im Querschnitt betrachtet an seiner der Leiterplatte bzw. dem Leiterband zugewandten Innenseite konkav - insbesondere sphärisch - gewölbt sein. Damit kann der Diffusor als Linse verwendet werden und die Abstrahlcharakteristik der LEDS eingestellt werden. Die gewölbte Innenseite kann zu den LEDs beabstandet sein. In order to achieve optical effects, the diffuser may be curved concavely, in particular spherically, on its inner side facing the printed circuit board or the conductor strip, as an alternative or in addition in cross-section. This allows the diffuser to be used as a lens and the emission characteristics of the LEDS are adjusted. The domed interior may be spaced apart from the LEDs.
Bei einer bevorzugten Weiterbildung des erfindungsgemäßen Lichtbandes weist der Diffusor Silikon auf oder er ist mit Leuchtstoff (z.B. Phosphor) gefüllt oder beschichtet. In a preferred embodiment of the light band according to the invention, the diffuser comprises silicone or it is filled or coated with phosphor (for example phosphorus).
Zur fertigungstechnischen und montagetechnischen Vereinfachung wird es bevorzugt, wenn das gesamte erfindungsgemäße Lichtband zu einer mittleren Längsebene spiegelsymmetrisch gestaltet ist. Dann kann das Lichtband mit beliebiger Orientierung an seine bestimmungsgemäßen Ort verbaut und befestigt werden. For manufacturing and assembly technical simplification, it is preferred if the entire light band according to the invention is designed mirror-symmetrically to a central longitudinal plane. Then the light band can be installed and fixed with any orientation to its intended location.
Je nach Anwendungsfall und gewünschter Lichtfarbe des erfindungsgemäßen Lichtbandes kann der Diffusor farbneutral oder farbig sein. Depending on the application and desired light color of the light band according to the invention, the diffuser can be neutral in color or color.
Kurze Beschreibung der Zeichnungen Brief description of the drawings
Im Folgenden soll die Erfindung anhand von Ausführungsbeispielen näher erläutert werden. Die Figuren zeigen : In the following, the invention will be explained in more detail with reference to exemplary embodiments. The figures show:
Fig. 1 ein erstes Ausführungsbeispiel des erfindungsgemäßen Lichtbandes im Querschnitt; und 1 shows a first embodiment of the light band according to the invention in cross section. and
Fig. 2 ein zweites Ausführungsbeispiel des erfindungsgemäßen Lichtbandes im Querschnitt. Bevorzugte Ausführung der Erfindung Fig. 2 shows a second embodiment of the light strip according to the invention in cross section. Preferred embodiment of the invention
Figur 1 zeigt ein erstes Ausführungsbeispiel eines erfindungsgemäßen Lichtbandes im Querschnitt. Es ist mit Bezug zu einer mittleren Längsebene 2 spiegelsymmetrisch ausgebildet. Das Lichtband hat ein als Leiterplatte dienendes flexibles Leiterband 1, dessen Breite in Figur 1 dargestellt ist, und dessen Länge mehrere Meter betragen kann. An einer Oberfläche 4 des Leiterbandes 1 ist eine Vielzahl von LEDs 6 angeordnet, die sich in einer Reihe entlang der Oberfläche 4 erstrecken, und von denen in Figur 1 nur eine LED 6 dargestellt ist. Figure 1 shows a first embodiment of a light band according to the invention in cross section. It is mirror-symmetrical with respect to a central longitudinal plane 2. The light band has a serving as a printed circuit board flexible conductor strip 1, whose width is shown in Figure 1, and whose length may be several meters. On a surface 4 of the conductor strip 1, a plurality of LEDs 6 is arranged, which extend in a row along the surface 4, and of which in Figure 1, only one LED 6 is shown.
Die LEDs 6 und die Oberfläche 4 des Leiterbandes 1 sind mit einem aus Silikon gefertigten Band abgedeckt. Dieses wirkt als Diffusor 8 des von den LEDs 6 (in Figur 1) im Wesentlichen nach oben abgestrahlten Lichts. Dazu hat der Diffusor 8 eine dem Leiterband 1 zugewandte konkav gekrümmte Innenseite 10 und eine konvex gekrümmte Außenseite 12. The LEDs 6 and the surface 4 of the conductor strip 1 are covered with a band made of silicone. This acts as a diffuser 8 of the light emitted by the LEDs 6 (in FIG. 1) substantially upwards. For this purpose, the diffuser 8 has a concave curved inner side 10 facing the conductor strip 1 and a convexly curved outer side 12.
Die seitlich entlang den beiden Seitenrändern 14 des Leiterbands 1 verlaufenden Randbereiche 16 des Diffusors 8 haben jeweils einen wulstartigen umgreifenden Abschnitt 18, deren Abstand zueinander geringer ist, als die Breite des Leiterbandes 1. Damit umgreifen die Abschnitte 18 die Seitenränder 14 des Leiterbands 1 und hintergreifen das Leiterband 1. Dabei kann die Elastizität des Silikons, aus dem der Diffusor 8 gefertigt ist, genutzt werden, um die beiden Randbereiche 16 und insbesondere die beiden umgreifenden Abschnitte 18 mit einer Spannkraft zu versehen, die jeweils in Richtung der Längsebene 2 des erfindungsgemäßen Lichtbandes gerichtet ist. Dazu kann in einem nicht montierten Zustand des Diffusors 8 der Innenabstand der beiden Randbereiche 16 und insbesondere der Innenabstand der beiden wulstartigen Abschnitte 18 geringer sein, als die Breite des Leiterbandes 1. Figur 2 zeigt ein zweites Ausführungsbeispiel des erfindungsgemäßen Lichtbandes im Querschnitt. Dabei entsprechend das Leiterband 1 und die LEDs 6 des ersten Ausführungsbeispiel gemäß Figur 1. Abweichend vom ersten Ausführungsbeispiel ist ein Diffusor 108 vorgesehen, der in einem (nicht gezeigten) nicht montierten Zustand ähnlich dem Diffusor 8 des ersten Ausführungsbeispiels geformt ist. The laterally along the two side edges 14 of the conductor strip 1 extending edge portions 16 of the diffuser 8 each have a bead-like encompassing portion 18 whose distance from each other is less than the width of the conductor strip 1. Thus, the portions 18 surround the side edges 14 of the conductor strip 1 and engage behind The conductor strip 1. The elasticity of the silicone from which the diffuser 8 is made, can be used to provide the two edge portions 16 and in particular the two encompassing portions 18 with a clamping force, respectively in the direction of the longitudinal plane 2 of the light strip according to the invention is directed. This can be done in an unassembled state of the diffuser 8, the inner spacing of the two edge regions 16 and in particular the inner spacing of the two bead-like sections 18 be less than the width of the conductor strip 1. Figure 2 shows a second embodiment of the light band according to the invention in cross section. In this case, corresponding to the conductor strip 1 and the LEDs 6 of the first embodiment according to Figure 1. Deviating from the first embodiment, a diffuser 108 is provided, which is shaped in a (not shown) unassembled state similar to the diffuser 8 of the first embodiment.
In dem in Figur 2 gezeigten montierten Zustand werden Randbereiche 116 und insbesondere die wulstartigen umgreifenden Abschnitte 18 des Diffusors 108 über eine Klammer 20 gegen die beiden Seitenränder 14 des Leiterbandes 1 gespannt. Die Klammer 20 hat einen flächigen Abschnitt 24, der etwa parallel zu einer Unterseite 28 des Leiterbandes 1 verläuft und dabei breiter als das Leiterband 1 ist. Weiterhin hat die Klammer 20 zwei Spannabschnitte 26, die (in dem in Figur 2 gezeigten Querschnitt) S-förmig ausgebildet sind. Die Spannabschnitte 26 bilden jeweils Freiraum für einen der beiden umgreifenden Abschnitte 18 aus und drücken den jeweiligen Randbereich 116 des Diffusors 108 gegen den jeweiligen Seitenrand 14 des Leiterbandes 1. Dadurch wird der Diffusor 108 im Übergangsbereich von seinem Hauptabschnitt zum jeweiligen Randbereich 116 in Richtung zur Längsebene 2 eingedrückt. Diese Verformung betrifft nicht die Außenseite 112 des Diffusors 108, über die das Licht der LEDs 6 nach außen (in Figur 2 weitgehend nach oben) abgestrahlt wird. In the mounted state shown in Figure 2, edge regions 116 and in particular the bead-like encompassing portions 18 of the diffuser 108 are clamped by a clamp 20 against the two side edges 14 of the conductor strip 1. The clamp 20 has a flat portion 24, which runs approximately parallel to an underside 28 of the conductor strip 1 and is wider than the conductor strip 1. Furthermore, the bracket 20 has two clamping portions 26 which are formed (in the cross section shown in Figure 2) S-shaped. The clamping portions 26 each form free space for one of the two encompassing portions 18 and press the respective edge region 116 of the diffuser 108 against the respective side edge 14 of the conductor strip 1. As a result, the diffuser 108 in the transition region from its main portion to the respective edge region 116 in the direction of the longitudinal plane 2 pressed. This deformation does not affect the outside 112 of the diffuser 108 over which the Light of the LEDs 6 to the outside (in Figure 2 largely upwards) is emitted.
Im flächigen Abschnitt 24 der Klammer 20 ist zumindest eine Durchgangsausnehmung angeordnet, in die eine Schraube 22 eingesetzt ist. Über diese Schraube 22 wird die Klammer 20 an ihrem bestimmungsgemäßen Ort befestigt. Damit ist eine sichere Befestigung des zweiten Ausführungsbeispiels des erfindungsgemäßen Lichtbandes gewährleistet. Weiterhin verstärken die Spannabschnitte 26 der Klammer 20 den Halt des Diffusors 108 am Leiterband 1. In the planar portion 24 of the bracket 20 at least one through-hole is arranged, in which a screw 22 is inserted. About this screw 22, the clamp 20 is attached to its intended location. For a secure attachment of the second embodiment of the light strip according to the invention is ensured. Furthermore, the clamping portions 26 of the bracket 20 reinforce the support of the diffuser 108 on the conductor strip. 1
Beide Ausführungsbeispiele des erfindungsgemäßen Lichtbandes können entlang der Ebene 2 (in den Figuren nach oben und nach unten) gebogen werden, da das Leiterband 1 und der Diffusor 8; 108 flexibel sind. Damit ist die Biegerichtung entlang der Haupt-Abstrahlrichtung des Lichtes und quer zum Leiterband 1 (in den Figuren nach oben und nach unten) gerichtet. Both embodiments of the light band according to the invention can be bent along the plane 2 (in the figures up and down), as the conductor strip 1 and the diffuser 8; 108 are flexible. Thus, the bending direction along the main emission direction of the light and is directed transversely to the conductor strip 1 (in the figures up and down).
Beide Ausführungsbeispiele des erfindungsgemäßen Lichtbandes sind symmetrisch zu Längsebene 2. Both embodiments of the light band according to the invention are symmetrical to the longitudinal plane. 2
Bezugs zeichenliste Reference sign list
1 Leiterband  1 ladder tape
2 Längsebene  2 longitudinal plane
4 Oberfläche 4 surface
6 LED 6 LEDs
8; 108 Diffusor  8th; 108 diffuser
10; 110 Innenseite  10; 110 inside
12; 112 Außenseite  12; 112 outside
14 Seitenrand  14 page margin
16; 116 Randbereich  16; 116 border area
18 umgreifender Abschnitt 18 encompassing section
20 Klammer 20 bracket
22 Schraube  22 screw
24 flächiger Abschnitt 24 flat section
26 Spannabschnitt 26 tensioning section
28 Unterseite  28 bottom

Claims

Ansprüche  claims
Lichtband mit einer flexiblen Leiterplatte oder mit einem flexiblen Leiterband (1), deren oder dessen Oberfläche (4) mit einer Mehrzahl von LEDs (6) bestückt ist, und mit einem flexiblen Diffusor (8; 108), der an der Oberfläche (4) angeordnet ist und die LEDs (6) überdeckt. Light band with a flexible printed circuit board or with a flexible conductor strip (1) whose surface (4) is equipped with a plurality of LEDs (6), and with a flexible diffuser (8; 108) attached to the surface (4) is arranged and covers the LEDs (6).
Lichtband nach Anspruch 1, wobei der Diffusor (8; 108) zwei seitliche Randbereiche (16; 116) hat, über die er an den beiden Seitenrändern (14) der Leiterplatte oder des Leiterbandes (1) befestigt ist, wobei der Diffusor (8; 108) die Oberfläche (4) der Leiterplatte oder des Leiterbandes (1) in ihrer oder seiner Breite überdeckt. The light band of claim 1, wherein the diffuser (8; 108) has two lateral edge portions (16; 116) by which it is secured to the two side edges (14) of the printed circuit board or conductor strip (1), the diffuser (8; 108) covers the surface (4) of the printed circuit board or the conductor strip (1) in its or its width.
3. Lichtband nach Anspruch 2, wobei die Randbereiche (16; 116) den jeweiligen Seitenrand (14) umgreifen . 3. Continuous line according to claim 2, wherein the edge regions (16; 116) engage around the respective side edge (14).
4. Lichtband nach Anspruch 2 oder 3, wobei die Leiterplatte oder das Leiterband (1) zwischen den beiden Randbereichen (16; 116) eingespannt ist. 5. Lichtband nach einem der vorhergehenden Ansprüche, wobei der Diffusor (8; 108) über seine Länge einen im Wesentlichen unveränderten Querschnitt aufweist. 4. Light band according to claim 2 or 3, wherein the printed circuit board or the conductor strip (1) between the two edge regions (16; 116) is clamped. 5. Continuous line according to one of the preceding claims, wherein the diffuser (8; 108) has a substantially unchanged cross section over its length.
6. Lichtband nach einem der vorhergehenden Ansprüche, wobei die LEDs (6) entlang einer Längsebene (2) des Lichtbandes auf der Leiterplatte oder dem Leiterbande (1) befestigt sind, und wobei der Diffusor (8; 108) eine zur Längsebene (2) im Wesentlichen symmetrische Form hat. 6. strip light according to one of the preceding claims, wherein the LEDs (6) along a longitudinal plane (2) of the light band on the circuit board or the Conductor band (1) are fastened, and wherein the diffuser (8; 108) has a shape substantially symmetrical to the longitudinal plane (2).
Lichtband zumindest nach einem der Ansprüche 2 bis 4, wobei die Randbereiche (16) über zumindest eine Klammer (20) in Richtung der Seitenränder (14) spannbar sind. Light band according to at least one of claims 2 to 4, wherein the edge regions (16) via at least one clamp (20) in the direction of the side edges (14) are tensioned.
8. Lichtband nach Anspruch 7, wobei die zumindest eine Klammer (20) einen flächigen Abschnitt (24) hat, der etwa parallel zur Leiterplatte oder zum8. Light band according to claim 7, wherein the at least one clip (20) has a flat portion (24) which is approximately parallel to the circuit board or to
Leiterband (1) angeordnet ist, und an dem Befestigungsmittel (22) angebracht sind. Conductor band (1) is arranged, and on the fastening means (22) are mounted.
Lichtband nach einem der vorhergehenden Ansprüche, wobei der Diffusor (8; 108) an seiner von der Leiterplatte oder vom Leiterband (1) abgewandten Außenseite (12; 112) konvex gewölbt ist. A light band according to one of the preceding claims, wherein the diffuser (8; 108) is convexly curved on its outer side (12; 112) facing away from the printed circuit board or from the conductor strip (1).
Lichtband nach einem der vorhergehenden Ansprüche, wobei der Diffusor (8; 108) an seiner der Leiterplatte oder dem Leiterband (1) zugewandten Innenseite (10; 110) konkav gewölbt ist. A light band according to one of the preceding claims, wherein the diffuser (8; 108) is concavely curved on its inner side (10; 110) facing the printed circuit board or the conductor strip (1).
Lichtband nach einem der vorhergehenden Ansprüche, wobei der Diffusor (8; 108) Silikon aufweist. A light band according to any one of the preceding claims, wherein the diffuser (8; 108) comprises silicone.
Lichtband nach einem der vorhergehenden Ansprüche, wobei der Diffusor (8; 108) mit Leuchtstoff gefüllt und/oder beschichtet ist. A light band according to any one of the preceding claims, wherein the diffuser (8; 108) is filled and / or coated with phosphor.
PCT/EP2013/062448 2012-06-25 2013-06-14 Flexible strip-shaped circuit board with leds WO2014001112A1 (en)

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DE102012210742.8A DE102012210742A1 (en) 2012-06-25 2012-06-25 FLEXIBLE STRIPED PCB WITH LEDS

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