EP3534678B1 - Dispositif d'éclairage et procédé correspondant - Google Patents

Dispositif d'éclairage et procédé correspondant Download PDF

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Publication number
EP3534678B1
EP3534678B1 EP19158574.4A EP19158574A EP3534678B1 EP 3534678 B1 EP3534678 B1 EP 3534678B1 EP 19158574 A EP19158574 A EP 19158574A EP 3534678 B1 EP3534678 B1 EP 3534678B1
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EP
European Patent Office
Prior art keywords
light radiation
radiation sources
led
support member
elongated support
Prior art date
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EP19158574.4A
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German (de)
English (en)
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EP3534678A1 (fr
Inventor
Luca Volpato
Alberto ZANOTTO
Lorenzo Baldo
Antonio STOCCO
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Osram GmbH
Osram SpA
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Osram GmbH
Osram SpA
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Publication of EP3534678A1 publication Critical patent/EP3534678A1/fr
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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
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/40—Details of LED load circuits
    • 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]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/395—Linear regulators

Definitions

  • the description refers to lighting devices.
  • One or more embodiments may be applied to lighting devices comprising electrically-powered light radiation sources, for example, solid-state light radiation sources such as LED sources.
  • lighting devices comprising an elongated substrate (for example, a flexible strip-like support or a rigid bar) on which sources (e.g. LEDs) of light radiation are distributed with a certain application step (sometimes called "pitch").
  • sources e.g. LEDs
  • Pitch a certain application step
  • these devices may comprise a plurality of individual light radiation emitting units electrically connected in parallel with each other and supplied by a constant voltage driver circuit.
  • the units can be provided with a current regulator able to regulate the current that crosses the light radiation sources according to a required output light flux.
  • the substrate flexible or rigid
  • the substrate is cut or sectioned by separating two consecutive units, so that the device can be cut to values of a total length equal to a multiple of the length of the individual unit.
  • the individual units may have a certain length, which results in a limitation of the flexibility offered to the user in choosing the overall length of the device.
  • This situation can arise, for example, in devices in which the application pitch of the sources is quite big (for example, in low flux and/or reduced cost modules), or in modules with a high number of LEDs (for example, in modules powered with 48V DC, capable of comprising twice the number of sources compared to modules powered with 24V DC).
  • a first solution involves reducing the application step or pitch of the sources.
  • Another solution may envisage reducing the power supply voltage, consequently reducing the number of light sources per unit of length, also reducing their length.
  • multi-chip light radiation sources for example, LEDs
  • the individual light-emitting element has a voltage drop equal to a multiple of that of an LED source of the single-chip type.
  • sources such as multi-chip LEDs have a higher cost than single-chip LEDs, which can negatively impact the overall costs of the device.
  • each unit of the device with one or more cutting lines provided with contacts (pads) at the cutting lines.
  • the user can then cut the module at the cutting lines according to the application and use requirements, in order to have a "final" unit at the cutting line, and to close the circuit by connecting an external element to the contacts provided for the purpose such as, for example, a resistor.
  • this external element is practically inapplicable in protected modules (for example, with an IPx degree of protection) without reduction of the protection against the penetration of external agents.
  • the invention relates to a lighting device according to the preamble of claim 1, which is known, for instance, from US 2015/092413 A1 . Also US 7 012 379 B1 is of interest for the invention.
  • One or more embodiments aim to provide a simple and economical solution capable of facilitating and making the cutting-to-length action of the modules discussed above more flexible, overcoming the drawbacks associated with the described solutions.
  • this object can be achieved thanks to a lighting device having the characteristics referred to in claim 1 that follows.
  • One or more embodiments may concern a corresponding method as per claim 6.
  • an embodiment in the context of the present description indicates that a particular configuration, structure or characteristic described in relation to the embodiment is included in at least one embodiment.
  • sentences such as “in an embodiment”, which may be present at various points in the present description, do not necessarily refer to exactly the same embodiment.
  • particular configurations, structures or characteristics can be combined in any suitable way in one or more embodiments.
  • the reference 10 indicates - overall - a unit included in a lighting device 100 comprising several units 10 connected, for example, electrically parallel to each other so as to be supplied (for example, as DC) with a power supply voltage applied between two lines (rails) LED+ and LED-.
  • the various units 10 comprise several electrically-powered light radiation sources.
  • solid state light radiation sources such as, for example, LED sources.
  • Lighting devices 100 of the type described herein have been commercially available for some time, for example, in the form of a strip-like or bar/rod-like substrate or support 102, substantially similar to a rigid or flexible printed circuit board, on which electrically-powered light radiation sources are arranged, e.g. LEDs.
  • devices 100 of this type are known in the art, which makes it unnecessary to provide a more detailed description herein.
  • these lighting devices 100 may include:
  • the device 100 (and therefore the electric units 10) has a first power supply line LED+ and a second power supply line LED-, the various units 10 are connected in parallel with each other, with these lines supplying respective power supply nodes for the various unit 10.
  • These devices 100 can be cut to length according to the application and use requirements at cutting lines LC provided at positions interposed between successive units 10.
  • this solution can be limitative, for example, in the case of low flux and/or low cost devices 100, or in general, of devices 100 in which the individual units 10 have a length of a certain relevance in the longitudinal extension direction of the type 100, so that the "resolution" available for carrying out the cutting-to-length operation may be excessively rough for various situations of use.
  • One or more embodiments as exemplified herein allow the aforesaid cutting-to-length operations to be carried out with a finer resolution, also being able to provide cutting-to-length operations performed within the individual unit 10, for example, at cutting lines LC1 or LC2 (the latter represented with a dashed line in Figure 1 ) in an intermediate position between the ends 10A and 10B of the support segment which houses a certain unit 10.
  • the string of light radiation sources for example, LEDs, such as in the example presented here
  • LED+ and LED- can be seen as comprising (see, for example, Figure 1 ) at least:
  • Figure 1 exemplifies (with a dashed line) the possibility of providing a second cutting line LC2, with the string of sources connected in series between the two power supply lines LED+ and LED-, which can be seen as comprising:
  • one or more embodiments may envisage the possibility of "eliminating" one of said sets of sources from the unit 10 (e.g. the one placed at the tail or distal position, at the 10B end of the segment, or rather D21, D22, D23 or D22, D23 in the two examples shown in Figure 1 ), separating it from the unit 10 with a cutting operation of the support or substrate 102 implemented at e.g. the line LC1, the line LC2 or other possible cutting lines, not visible in the drawings for reasons of simplicity.
  • the unit 10 e.g. the one placed at the tail or distal position, at the 10B end of the segment, or rather D21, D22, D23 or D22, D23 in the two examples shown in Figure 1
  • a cutting operation of the support or substrate 102 implemented at e.g. the line LC1, the line LC2 or other possible cutting lines, not visible in the drawings for reasons of simplicity.
  • first set or section of sources D11, D12 and D13 which can be associated with a current regulator 11, for example, linear
  • a second set or section of sources D21, D22 and D23 intended to be separated from the first set (and therefore from the unit 10) with a cutting action carried out at the cutting line LC1.
  • an electrically-conductive path extending towards one of the supply nodes of the unit 10 (for example, the node LED-) starting from a node A located in an intermediate position between the set D11, D12, D13 and the set D21, D22, D23 on the side of the cutting line LC1 facing the other power supply node of the unit 10 (e.g. the node LED+), or rather, towards the first set of sources D11, D12, D13.
  • Such an electrically-conductive path - activated when the second set of sources D21, D22, D23 is separated from the unit 10 by cutting the substrate 102 along the line LC1 - allows maintenance of the electrical connection between the nodes LED+ and LED-so as to ensure power supply to the set of sources D11, D12, D13 that remains in the unit 10.
  • Activation of this electrically-conductive path can take place in different ways (e.g. by means of an electronic switch such as a transistor, an e-fuse or, as exemplified here, a Zener diode).
  • an electronic switch such as a transistor, an e-fuse or, as exemplified here, a Zener diode.
  • a Zener diode 12 as exemplified in the solid line in Figure 1 , is an example of an electronic switch that can be closed automatically, activating the associated electrically-conductive path as a result of the fact that the second set of sources D21, D22, D23 is separated from the unit 10 by cutting the substrate 102 along the line LC1.
  • the Zener diode 12 can be arranged with the cathode coupled to the node A (i.e. at the end of the first set of sources D11, D12, D13 opposite to the power supply node LED+) and the anode coupled to the node LED-.
  • the Zener diode 12 makes the current path from the node LED+ to the node LED- conductive, passing through the diodes D11, D12, D13, which can - in this way - be regularly supplied and activated.
  • Figure 1 also illustrates (with dashed lines) the possibility of providing, at an intermediate position between the ends 10A and 10B, at least one other possible cutting line, namely the line LC2.
  • the first set or section of sources (with associated current regulator 11) can be seen to comprise the sources D11, D12, D13 and D21, with the second set or section of sources, intended to be separated from the first set (and therefore from the unit 10) by a cutting action carried out at the cutting line LC2, comprising the sources D22 and D23.
  • Such an electrically-conductive path can be activated when the second set of sources D22, D23 is separated from the unit 10 by cutting the substrate 102 along the line LC2 - again allowing maintenance of the electrical connection between the nodes LED+ and LED-so as to ensure the power supply to the set of sources D11, D12, D13, D21 that remain in the unit 10.
  • the Zener diode 13 can be arranged with the cathode coupled to the node B (i.e. at the end of the first set of sources D11, D12, D13, D21 opposite to the power supply node LED+) and the anode coupled to the node LED-.
  • the Zener diode 13 makes the current path from the node LED+ to the node LED- conductive, passing through the diodes D11, D12, D13, D21, which can - in this way - be regularly supplied and activated.
  • the above-exemplified criterion can even be applied to different definitions of a first set and of a second set of sources with the cutting line of the substrate passing between the two sets and/or applied to a number of cutting lines greater than two, with a respective switch associated with each cutting line (e.g. a Zener diode 12, 13, ...) designed to activate a respective conductive path able to maintain the electrical coupling between the nodes LED+ and LED- through the sources D11,..., which remain in the unit 10 and are not removed therefrom due to the cutting to the required length implemented at the line LC1 (or the line LC2 or other provided cutting lines).
  • a respective switch associated with each cutting line e.g. a Zener diode 12, 13, .
  • the Zener voltage of the diode 12 - and of the diode 13, or of other diodes of this type provided for the same purpose - can be chosen in such a way as to result (at least slightly) greater than the operating voltage at the ends of the light radiation sources of the set that is separated from the unit 10 due to cutting of the substrate 102.
  • This operating voltage indicates the voltage that would be applied to the ends of the light radiation sources of the set that is separated from the unit 10 if, instead of being “cut off” (and being “replaced” by a Zener diode, e.g. 12, 13), this set was left attached to the unit 10.
  • the Zener voltage of the diode 12 can be chosen so as to be (slightly) higher than the operating voltage at the ends of the light radiation sources D21, D22, D23, which can be separated from the unit 10 by cutting at the cutting line LC1.
  • this criterion can be extended to virtually any number of cutting lines/sections of light radiation sources.
  • Zener voltages implemented according to the criteria outlined above ensures that, until the corresponding set or section of light radiation sources is included in the unit 10, the Zener diode in question (12 or 13, with reference the example shown in Figure 1 ) behaves essentially with an open circuit, without affecting the operation of the unit 10 (the relative electrically-conductive path towards the node LED- is in fact inactive, that is, non-conductive).
  • the unit 10 when the unit 10 is cut, for example, at one of the lines LC1 or LC2, so as to separate a certain set of radiation sources from the unit 10 (for example, the sources D21, D22, D23 - in the case of a cut along the line LC1 - or the sources D22, D23 in the case of a cut along the line LC2), the corresponding Zener diode (the Zener diode 12 in the first case, or the Zener diode 13, in the second case) becomes active (i.e.
  • the voltage at the ends of the activated Zener diode is equal to its Zener voltage without causing overvoltage to damage the current regulator.
  • Figure 2 exemplifies (referring for simplicity to the case of an single cutting line LC1) a possible practical use of the solution exemplified in Figure 1 , referring to the possible presence of two units, in which the unit 10 on the left in the figure is - so to speak - "integral" (i.e. it includes all six LEDs D11, D12, D13, D21, D22, D23) while the unit 10' on the right has been cut along the LC1 cutting line so as to include (only) the LEDs D11, D12 and D13 (with the regulator 11) and the correspondingly activated Zener diode 12.
  • the device 100 can also be cut to length at one of the lines LC1 (or LC2), thus achieving a finer resolution in the cutting-to-length possibility of the device 10.
  • the current set by the (linear) regulator 11 flows through all the LEDs of the chain because the Zener diode 12 behaves like an open circuit.
  • the current established by the regulator 11 flows towards the line LED- passing through the LEDs D11, D12 and D13 and through the Zener diode 13 which, with its Zener voltage, "replaces” - so to speak - the LEDs 21, 22, 23 no longer present, reproducing the voltage drop across them and avoiding the generation of overvoltage and/or overloading conditions on the regulator.
  • a certain number of light radiation sources with a Zener diode in the unit 10 that is cut at an intermediate cutting line, such as the line LC1 (or the line LC2) reduces the efficiency in terms of lumens per watt only in the unit 10 in which the cut was made, while the other units 10 of the device 100 are not affected by the cutting action.
  • Figure 3 further exemplifies a solution as represented in Figure 1 at the level of a possible implementation within an elongated device 100 comprising a substrate 102 substantially similar to a (flexible or rigid) printed circuit board, with the various elements already presented with reference to Figures 1 and 2 indicated for simplicity with the same reference numerals, which makes it unnecessary to repeat with reference to Figure 3 the description already provided with reference to Figures 1 and 2 .
  • a solution such as that exemplified in Figure 3 , can be used in the possible application of resistors in parallel (illustrated in the figure without the assignment of specific references) for the purpose of protection against electrostatic discharge phenomena - ESD), as well as to the production of the device 100 in the form of a protected device (for example, with an IPx degree of protection).
  • a lighting device (e.g. 100) according to one or more embodiments may comprise:
  • said at least one separable set of light radiation sources (e.g. D21, D22, D23 or D22, D23) is configured to provide a line of current between:
  • the electrically-conductive path can comprise an electronic switch (e.g. 12, 13) switchable between:
  • the electronic switch may comprise a Zener diode.
  • said at least one electrical unit in the sequence of electrical units may comprise:
  • the elongated support member can be separable at:
  • the at least one electrical unit in the sequence of electrical units may comprise a current regulator (e.g. linear, 11) coupled to a set (e.g. D11, D12, D13 or D11, D12, D13, D21) of light radiation sources in said plurality of electrically-powered light radiation sources that are different from the at least one set (D21, D22, D23 or D22, D23) separable from the electric unit.
  • a current regulator e.g. linear, 11
  • a set e.g. D11, D12, D13 or D11, D12, D13, D21
  • the electrically-powered light radiation sources may comprise solid state sources, preferably LED sources.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Claims (6)

  1. Un dispositif d'éclairage (100), comprenant :
    - un organe support allongé (102) comprenant une succession de segments consécutifs, les segments ayant une première extrémité (10A) et une seconde extrémité (10B) opposée suivant la longueur de l'organe support allongé (102),
    - des sources de rayonnement lumineux aptes à être alimentées électriquement et qui sont distribuées le long de l'organe support allongé (102) en une succession d'unités électriques (10) agencées au niveau de segments respectifs de l'organe support allongé (102), les unités électriques (10) comprenant un premier nœud d'alimentation (LED+) et un second nœud d'alimentation (LED-),
    dans lequel au moins une unité électrique (10) de la succession d'unités électriques comprend :
    - une pluralité d'ensembles de sources de rayonnement lumineux (D11, D12, D13 ; D21, D22, D23 ; D11, D12, D13, D21 ; D22, D23) aptes à être électriquement alimentés, et agencés électriquement en série entre le premier nœud d'alimentation (LED+) et le second nœud d'alimentation (LED-) de l'unité électrique (10), avec au moins un ensemble (D21, D22, D23 ; D22, D23) de sources de rayonnement lumineux agencé au niveau de l'une (10B) de la première extrémité (10A) et de la seconde extrémité (10B) du segment respectif de l'organe support allongé (102) dissociable de l'unité électrique (10) au niveau d'une ligne de découpe (LC1, LC2) de l'organe support allongé (102) située entre la première extrémité (10A) et la seconde extrémité (10B) du segment respectif de l'organe support allongé (102),
    - un trajet électriquement conducteur (12, 13) en parallèle audit ensemble dissociable (D21, D22, D23 ; D22, D23) de sources de rayonnement lumineux, le trajet électriquement conducteur pouvant être activé à la suite de la dissociation de l'au moins un ensemble dissociable (D21, D22, D23 ; D22, D23) d'avec l'unité électrique (10) au niveau de ladite ligne de découpe (LC1, LC2) de l'organe support allongé (102), avec le couplage électrique du premier nœud d'alimentation (LED+) et du second nœud d'alimentation (LED-) maintenus par le trajet électriquement conducteur activé (12, 13),
    dans lequel le trajet électriquement conducteur comprend un commutateur électronique (12, 13) apte à basculer entre :
    - un premier état, non conducteur, avec l'au moins un ensemble dissociable de sources de rayonnement lumineux (D21, D22, D23 ; D22, D23) couplé à l'unité respective (10), et
    - un second état, conducteur, avec l'au moins un ensemble dissociable de sources de rayonnement lumineux (D21, D22, D23 ; D22, D23) dissocié de l'unité électrique respective (10),
    caractérisé en ce que
    - au moins une unité électrique (10) de la succession d'unités électriques comprend un régulateur de courant (11) couplé à un ensemble (D11, D12, D13 ; D11, D12, D13, D21) de sources de rayonnement lumineux de ladite pluralité d'ensembles de sources de rayonnement lumineux aptes à être électriquement alimentés (D11, D12, D13 ; D21, D22, D23 ; D11, D12, D13, D21 ; D22, D23), autre que ledit au moins un ensemble (D21, D22, D23 ; D22, D23) dissociable de l'unité électrique (10),
    - ledit au moins un ensemble dissociable de sources de rayonnement lumineux (D21, D22, D23 ; D22, D23) présente à la traversée une chute de tension opérationnelle, et
    - le commutateur électronique comprend une diode Zener (12, 13) ayant une tension de Zener supérieure à ladite chute de tension opérationnelle.
  2. Le dispositif d'éclairage (100) de la revendication 1, dans lequel ledit au moins un ensemble dissociable de sources de rayonnement lumineux (D21, D22, D23 ; D22, D23) est configuré pour former une ligne de courant entre :
    - un nœud de couplage (A, B) de l'au moins un ensemble dissociable de sources de rayonnement lumineux (D21, D22, D23 ; D22, D23) à un autre ensemble de sources de rayonnement lumineux (D11, D12, D13 ; D11, D12, D13, D21) de la pluralité d'ensembles de sources de rayonnement lumineux agencés électriquement en série entre le premier nœud d'alimentation (LED+) et le second nœud d'alimentation (LED-), et
    - l'un (LED-) du premier nœud d'alimentation (LED+) et du second nœud d'alimentation (LED-),
    dans lequel le trajet électriquement conducteur (12, 13) peut être activé pour coupler ledit nœud (A, B) audit un (LED-) du premier nœud d'alimentation (LED+) et du second nœud d'alimentation (LED-) pour maintenir entre eux un couplage électrique avec l'au moins un ensemble dissociable (D21, D22, D23 ; D22, D23) de sources de rayonnement lumineux dissocié de l'au moins une unité électrique (10).
  3. Le dispositif d'éclairage (100) de l'une des revendications précédentes, dans lequel ladite au moins une unité électrique (10) de la succession d'unités électriques comprend :
    - une pluralité d'ensembles (D21, D22, D23 ; D22, D23) de sources de rayonnement lumineux agencés au niveau de l'une (10B) de la première extrémité (10A) et de la seconde extrémité (10B) du segment respectif de l'organe support allongé (102), les ensembles de la pluralité d'ensembles (D21, D22, D23 ; D22, D23) étant sélectivement dissociables de l'unité électrique (10) au niveau de ligne de découpe respective (LC1, LC2) de l'organe support allongé (102) située entre la première extrémité (10A) et la seconde extrémité (10B) du segment respectif de l'organe support allongé (102),
    - une pluralité de trajets électriquement conducteurs (12, 13) en parallèle à des ensembles respectifs de sources de rayonnement lumineux de ladite pluralité d'ensembles (D21, D22, D23 ; D22, D23) sélectivement dissociables de l'unité électrique (10) au niveau desdites lignes de découpe respectives (LC1, LC2), lesdits trajets électriquement conducteurs (12, 13) pouvant être activés à la suite de la dissociation de l'ensemble dissociable respectif (D21, D22, D23 ; D22, D23) de sources de rayonnement lumineux d'avec l'unité électrique (10) au niveau d'une ligne de découpe respective (LC1, LC2) de l'organe support allongé (102) avec maintien du couplage électrique au premier nœud d'alimentation (LED+) et au second nœud d'alimentation (LED-) par le trajet électriquement conducteur activé (12, 13).
  4. Le dispositif d'éclairage (100) de l'une des revendications précédentes, dans lequel l'organe support allongé (102) peut être dissocié :
    - au niveau de lignes de découpe (LC) situées entre segments consécutifs de ladite succession de segments consécutifs, et
    - au niveau de lignes de découpe (LC1, LC2) situées entre la première extrémité (10A) et la seconde extrémité (10B) desdits segments.
  5. Le dispositif d'éclairage (100) de l'une des revendications précédentes, dans lequel les sources de rayonnement lumineux aptes à être électriquement alimentées (D11, D12, D13, D21, D22, D23) comprennent des sources statiques, de préférence des sources LED.
  6. Un procédé, comprenant :
    - l'obtention d'un organe support allongé (102) avec une succession de segments consécutifs, les segments ayant une première extrémité (10A) et une seconde extrémité (10B) opposées dans la direction de la longueur de l'organe support allongé (102),
    - la distribution le long de l'organe support allongé (102) d'une succession d'unités électriques (10) comprenant des sources de rayonnement lumineux aptes à être électriquement alimentées et qui sont agencées au niveau de segments respectifs de l'organe support allongé (102), les unités électriques (10) comprenant un premier nœud d'alimentation (LED+) et un second nœud d'alimentation (LED-),
    - la mise en place au niveau d'au moins une unité électrique (10) de la succession d'unités électriques :
    - i) d'une pluralité d'ensembles de sources de rayonnement lumineux aptes à être électriquement alimentés (D11, D12, D13 ; D21, D22, D23 ; D11, D12, D13, D21 ; D22, D23), agencés électriquement en série entre le premier nœud d'alimentation (LED+) et le second nœud d'alimentation (LED-) de l'unité électrique (10), avec au moins un ensemble (D21, D22, D23 ; D22, D23) de sources de rayonnement lumineux agencé au niveau de l'une (10B) de la première extrémité (10A) et de la seconde extrémité (10B) du segment respectif de l'organe support allongé (102) dissociable de l'unité électrique (10) au niveau d'une ligne de découpe (LC1, LC2) de l'organe support allongé (102) située entre la première extrémité (10A) et la seconde extrémité (10B) du segment respectif de l'organe support allongé (102),
    ii) un trajet électriquement conducteur (12, 13) en parallèle audit au moins un ensemble dissociable (D21, D22, D23 ; D22, D23) de sources de rayonnement lumineux,
    dans lequel le trajet électriquement conducteur comprend un commutateur électronique (12, 13) pouvant basculer entre :
    - un premier état, non conducteur, avec l'au moins un ensemble dissociable de sources de rayonnement lumineux (D21, D22, D23 ; D22, D23) couplé à l'unité respective (10), et
    - un second état, conducteur, avec l'au moins un ensemble dissociable de sources de rayonnement lumineux (D21, D22, D23 ; D22, D23) dissocié de l'unité électrique respective (10),
    dans lequel :
    - au moins une unité électrique (10) de la succession d'unités électriques comprend un régulateur de courant (11) couplé à un ensemble (D11, D12, D13 ; D11, D12, D13, D21) de sources de rayonnement lumineux de ladite pluralité d'ensembles de sources de rayonnement lumineux aptes à être électriquement alimentés (D11, D12, D13 ; D21, D22, D23 ; D11, D12, D13, D21 ; D22, D23), autre que ledit au moins un ensemble (D21, D22, D23 ; D22, D23) dissociable de l'unité électrique (10),
    - ledit au moins un ensemble dissociable de sources de rayonnement lumineux (D21, D22, D23 ; D22, D23) présente à la traversée une chute de tension opérationnelle, et
    - le commutateur électronique comprend une diode Zener (12, 13) ayant une tension de Zener supérieure à ladite chute de tension opérationnelle,
    le procédé comprenant la dissociation de l'au moins un élément dissociable (D21, D22, D23 ; D22, D23) d'avec l'unité électrique (10) au niveau de ladite ligne de découpe (LC1, LC2) de l'organe support allongé (102), et le maintien du couplage électrique du premier nœud d'alimentation (LED+) et du second nœud d'alimentation (LED-) suite à l'activation dudit trajet électriquement conducteur (12, 13).
EP19158574.4A 2018-03-02 2019-02-21 Dispositif d'éclairage et procédé correspondant Active EP3534678B1 (fr)

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US7012379B1 (en) * 2003-03-27 2006-03-14 Ilight Technologies, Inc. Cuttable illumination device
US9772076B2 (en) * 2013-09-30 2017-09-26 Osram Sylvania Inc. Cuttable flexible light engines
FR3048056A1 (fr) * 2016-02-19 2017-08-25 Lumila Ruban lumineux a diodes electroluminescentes

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