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EP2454520B1 - Bande lumineuse - Google Patents

Bande lumineuse Download PDF

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Publication number
EP2454520B1
EP2454520B1 EP10707290.2A EP10707290A EP2454520B1 EP 2454520 B1 EP2454520 B1 EP 2454520B1 EP 10707290 A EP10707290 A EP 10707290A EP 2454520 B1 EP2454520 B1 EP 2454520B1
Authority
EP
European Patent Office
Prior art keywords
light
flexible
circuit board
light strip
printed circuit
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.)
Not-in-force
Application number
EP10707290.2A
Other languages
German (de)
English (en)
Other versions
EP2454520A1 (fr
Inventor
Jan Albert Boer
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.)
Tri-O-Light BV
Original Assignee
Tri-O-Light BV
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 Tri-O-Light BV filed Critical Tri-O-Light BV
Publication of EP2454520A1 publication Critical patent/EP2454520A1/fr
Application granted granted Critical
Publication of EP2454520B1 publication Critical patent/EP2454520B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F21V7/00—Reflectors for light sources
    • F21V7/005—Reflectors for light sources with an elongated shape to cooperate with linear light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S4/00—Lighting devices or systems using a string or strip of light sources
    • F21S4/20—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports
    • F21S4/28—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports rigid, e.g. LED bars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • F21V7/0016—Reflectors for light sources providing for indirect lighting on lighting devices that also provide for direct lighting, e.g. by means of independent light sources, by splitting of the light beam, by switching between both lighting modes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2113/00—Combination of light sources
    • F21Y2113/10—Combination of light sources of different colours
    • F21Y2113/13—Combination of light sources of different colours comprising an assembly of point-like light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present disclosure relates to a light strip, in particular an elongated flexible light strip comprising a plurality of light sources.
  • Illuminating objects and/or spaces by means of elongated lighting arrangements is known.
  • EP 1 756 471 discloses an elongated flexible lighting system which comprises an array of light sources that are illuminated by electric power. It further comprises an elongated translucent extrusion of flexible material.
  • the array of light sources is integral to the extrusion with said extrusion transmitting and dispersing the light from the array such that the lighting system gives the appearance that the array of light sources is a continuous light source.
  • the conducting element is manufactured from an essentially flat conductor part, such as a band a strip or the like, into which there has been attached electric components, such as probes, LEDs, resistors and/or the like by arranging the same, preferably throughout built-in when viewed in a cross section with a casing material forming the said casing part, by exploiting a continuous manufacturing process, such as extrusion or the like.
  • the document also relates to a conducting element to be manufactured by the method.
  • the conducting element is a thin ribbon which is stored on rolls and which is particularly designed for building into a vinyl floor.
  • thermoplastic extrusion material completely encapsulates the first and second bus elements and the LED and urges the first and second bus elements and the LED into operative contact. To provide a robust light strip the thermoplastic extrusion material must harden, losing its flexibility.
  • the flexible light strip of claim 1 is provided.
  • the light strip including housing, being a flexible object facilitates handling and storage, e.g. coiled and/or bundled, and facilitates arranging a plurality of light sources along an object and adaptation of the light strip to a substrate to which it is to be mounted.
  • the light sources emitting substantially normal to the circuit board facilitates manufacturing and/or mounting the light strip, in that the emission direction of the light sources is readily discernible and in that light may be emitted radially from around bends with small radii.
  • Arranging the first and second portions such that the emitted light is reflected off the second portion allows providing illumination to desired directions other than normal to the circuit board, while retaining, e.g., the above-described beneficial mounting and/or handling properties. This significantly increases the number of possible locations and uses for the light strip.
  • the first and second portions are arranged so that the individual light sources are not directly visible, such that the emitted light or light cones are visible, but the light sources themselves and related objects are obscured from direct vision.
  • the first and second portions of the housing may generally have different optical properties, e.g. different refractive index, reflective index and/or transmittance for one or more wavelengths of the light emitted by the light sources, so as to provide desired illumination effects.
  • the housing is provided via moulding and/or extrusion techniques. This allows manufacturing light strips substantially uninterrupted for tens to hundreds of meters on end at substantially continuous properties and at a substantially constant quality.
  • the first and second portions may be co-moulded and/or co-extruded during such manufacturing process.
  • Suitable materials for the flexible circuit board comprise (strips of) insulating plastics materials such as nylon, kapton, mylar, etc.
  • Suitable materials for the housing comprise resilient plastics such as polyurethane, polyvinylchloride, PET, silicone rubber, etc, as well as mixtures thereof.
  • Claims 2 and 3 define light strips with particularly useful light emission intensity distributions.
  • the flexible light strip of claim 4 is provided.
  • the flexible printed circuit board, the plurality of light sources and the housing allow to provide an illumination arrangement with a plurality of light sources along an object which is shielded from outside influences, e.g. protected against bad weather.
  • the light strip comprising second electrical conductors allows providing operational security to the device. Further, the second electrical conductors may be manufactured in different manners than via printed circuit techniques which reduces costs. In particular when the second electrical conductors are manufactured as electric cables, e.g. copper wires and/or strands, their electrical resistance is significantly reduced compared to conductors manufactured with printed circuit techniques.
  • the flexible light strip of claim 4 allows powering an elongated flexible light strip with a power source connected on one side of the light strip and delivering electrical power to light sources remote from the position of the connection of the power source since electrical losses in the printed circuit board are counteracted by the parallel second conductors which suffer less to substantially no losses.
  • Interconnecting the first and second conductors on plural positions allows powering light sources from opposite sides which may result in a substantially constant optical output power of the light sources of the section concerned. This allows providing longer light strips with sufficient optical intensity without requiring additional power connections and/or interruptions than in the case of single-sided powering.
  • the second electrical conductors may be most easily connected to the flexible printed circuit board one or more connection portions between printed circuit board sections. This obviates further connection portions.
  • the second conductors in particular when in the form of metallic wires or cables, provide increased mechanical robustness to the light strip, in particular by decreasing variations of mechanical properties of the light strip. This assists preventing localisation of stress and related damage and it also facilitates handling and storage.
  • the housing material of a flexible light strip advantageously closely follows the contours of the circuit board, the light sources, and any further objects associated therewith so as to provide the light strip as an integral whole.
  • the outside shape of the light strip may be substantially constant, providing a pleasing appearance and facilitating mounting and handling.
  • the light strip is a substantially massive object, having substantially no cavities, so as to have increased robustness against vandalism and/or deformation under pressure of mounting arrangements and/or loads. Resistance to deformation further provides increased reliability of the illumination pattern to be provided by the flexible light strip.
  • an assembly according to claim 10 is provided. This facilitates interconnecting first and second conductors, thus reducing power losses along circuit board sections.
  • the assembly according to claim 11 facilitates interconnecting plural light strips, with improved power delivery per light strip.
  • the light strip 1 further comprises second conductors 6 extending underneath and in parallel to the flexible printed circuit board 2 along the length D of the light strip 1.
  • the first and second portions 7, 8 are formed around the circuit board 2 with any object arranged on it such that an object is formed which is closely encapsulated by the material(s) forming the housing 4 and such that an integrated and substantially massive object is formed, which is still flexible at least in the LH direction, preferably also in the WL direction and allowing helical (or cork-screw like) bending.
  • the light strip 1 is mountable onto a substrate with a bottom side (surface at negative H side) and due to its flexibility it can follow curves and bends of the substrate with the emission direction of the light sources 3 facing locally outward from the substrate (in the direction of the local normal, along H).
  • the first and second portions of the housing 7, 8 are arranged such that the light emitted by the light sources 3 is reflected off the second portion 8 to produce an illumination pattern with increased intensity in a direction substantially normal to the flexible printed circuit board 2.
  • the first and second conductors may be configured for powering a portion or all light sources 3 in series or in parallel. Parallel connection is preferred since it reduces the possible effect of one or more defect individual light sources 3.
  • a set of two conductors (+ and -) powered by DC power may suffice.
  • different conductors, control electronics and/or control cables may be provided. E.g. when using red, green and blue light LEDs a set of four connections may be used: one connection for each colour and a common ground connection. This may be provided with fourfirst conductors and four second conductors (e.g. see Figs 1A-2B , 5 and 6 ). Further conductors for further options and/or controls are also possible.
  • the circuit board 2 may be coloured and/or made reflective.
  • the housing may comprise one or more strips, films, and/or coating layers, etc, possibly integrated with a strip, film, coating, etc, on the circuit board 2, which may correspond to the colour of the substrate and/or be diffusely reflective, to reduce visibility of the light strip when the light level of the light sources is below environmental light or the light sources are off (i.e. not lit).

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Led Device Packages (AREA)

Claims (12)

  1. Bande d'éclairage flexible (1, 1A, 1B) comprenant une carte de circuit imprimé flexible (2, 2A, 2B),
    une pluralité de sources lumineuses (3) agencées sur la carte de circuit imprimé flexible (2, 2A, 2B) pour émettre de la lumière,
    des premiers conducteurs pour transporter un courant, agencés sur la carte de circuit imprimé flexible (2, 2A, 2B), connectés et agencés pour mettre sous tension les sources lumineuses (3), et
    un boîtier (4) qui est formé autour de la carte de circuit imprimé flexible (2, 2A, 2B) et des sources lumineuses (3) afin de former un objet allongé flexible intégré ;
    dans laquelle les sources lumineuses (3) sont agencées pour émettre de la lumière de façon sensiblement normale par rapport à la carte de circuit imprimé flexible (2, 2A, 2B) ;
    dans laquelle le boîtier (4) comprend au moins une première partie (7) et une seconde partie (8) s'étendant le long de la carte de circuit imprimé flexible (2, 2A, 2B),
    dans laquelle la première partie (7) est sensiblement translucide pour de la lumière émise par les sources lumineuses (3),
    caractérisée en ce que les première et seconde parties (7 ; 8) sont agencées de sorte que la lumière émise soit réfléchie à partir de la seconde partie (8) et la direction de distribution principale de la lumière émise soit redirigée pour produire un motif d'intensité avec une intensité maximum dans une direction (E) à un angle non nul (α) par rapport à la normale (H) de la carte de circuit imprimé flexible (2, 2A, 2B).
  2. Bande d'éclairage flexible (1, 1A, 1B) selon la revendication 1, dans laquelle l'angle (α) par rapport à la normale (H) de la carte de circuit imprimé flexible (2, 2A, 2B) est dans une plage de 30 à 60 degrés, par exemple environ 45 degrés, par rapport à la normale (H) de la carte de circuit imprimé flexible (2, 2A, 2B).
  3. Bande d'éclairage flexible (1, 1A, 1B) selon la revendication 1 ou 2, dans laquelle au moins environ la moitié de l'intensité émise de la lumière émise par les sources lumineuses (3) est réfléchie à partir de la seconde partie (8) et est redirigée par celle-ci et pour être émise à partir de la bande d'éclairage (1, 1A, 1B) dans la direction (E) à l'angle (α) par rapport à la normale (H) à la carte de circuit imprimé flexible (2).
  4. Bande d'éclairage flexible (1, 1A, 1B) selon une quelconque revendication précédente, dans laquelle la bande d'éclairage flexible (1, 1A, 1B) présente une forme sensiblement rectangulaire en section transversale avec des première et deuxième faces opposées (10 ; 11) et des troisième et quatrième faces opposées (12 ; 13), la carte de circuit imprimé flexible (2) s'étend sensiblement parallèlement à la première face et les première et seconde parties (7 ; 8) sont agencées de sorte qu'au moins environ la moitié de l'intensité émise à partir de la bande d'éclairage (1, 1A, 1B) soit émise à partir des troisième et/ou quatrième faces (12 ; 13).
  5. Bande d'éclairage flexible (1, 1A, 1B) selon une quelconque revendication précédente,
    dans laquelle la bande d'éclairage (1, 1A, 1B) comprend un ou plusieurs seconds conducteurs électriques (6) s'étendant de façon sensiblement ininterrompue en parallèle à la carte de circuit imprimé flexible (2, 2A, 2B) et électriquement connectés la carte de circuit imprimé flexible (2, 2A, 2B) dans plusieurs positions ; et dans laquelle le boîtier (4) est formé autour de la carte de circuit imprimé flexible (2, 2A, 2B), des sources lumineuses (3) et des seconds conducteurs électriques (6) afin de former un objet allongé flexible intégré.
  6. Bande d'éclairage flexible (1, 1A, 1B) selon une quelconque revendication précédente, dans laquelle la carte de circuit imprimé flexible (2) comprend une pluralité de sections (2A, 2B, 2C) qui sont mécaniquement et électriquement interconnectées avec des parties de connexion (17) et dans laquelle le boîtier (4) est sensiblement continu le long de la pluralité de sections (2A, 2B, 2C).
  7. Bande d'éclairage flexible (1, 1A, 1B) selon la revendication 6, dans laquelle le ou les seconds conducteurs électriques (6) sont sensiblement continus le long de la pluralité de sections (2A, 2B, 2C).
  8. Bande d'éclairage flexible (1, 1A, 1B) selon une quelconque revendication précédente, dans laquelle la bande d'éclairage flexible (1, 1A, 1B) est un objet sensiblement massif.
  9. Bande d'éclairage flexible (1, 1A, 1B) selon une quelconque revendication précédente, dans laquelle au moins certaines parmi la pluralité de sources lumineuses (3) sont agencées pour émettre de la lumière colorée.
  10. Bande d'éclairage flexible (1, 1A, 1B) selon une quelconque revendication précédente, dans laquelle au moins certaines parmi la pluralité de sources lumineuses (3) sont agencées pour pouvoir être individuellement commandées.
  11. Ensemble comprenant au moins one bande d'éclairage flexible (1, 1A, 1B) selon la revendication 5 ou selon la revendication 5 et une quelconque revendication dépendant de la revendication 5, et
    comprenant en outre un ou plusieurs connecteurs (16, 20, 21) pour interconnecter au moins un premier conducteur avec au moins un second conducteur (6) de l'au moins une bande d'éclairage flexible (1, 1A, 1B).
  12. Ensemble selon la revendication 11, comprenant au moins une première bande d'éclairage flexible (1A) et une seconde bande d'éclairage flexible (1B), les première et seconde bandes d'éclairage flexibles (1A ; 1B) étant toutes les deux une bande d'éclairage flexible (1, 1A, 1B) selon la revendication 4 ou selon la revendication 4 et une quelconque revendication dépendant de la revendication 4,
    dans lequel l'ensemble comprend en outre au moins un connecteur (16, 20, 21) pour interconnecter au moins un premier conducteur à la fois des première et seconde bandes d'éclairage flexibles (1A; 1B) et au moins un second conducteur (6) d'au moins une des première et seconde bandes d'éclairage flexibles (1A ; 1B).
EP10707290.2A 2010-03-09 2010-03-09 Bande lumineuse Not-in-force EP2454520B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2010/052947 WO2011110217A1 (fr) 2010-03-09 2010-03-09 Bande lumineuse

Publications (2)

Publication Number Publication Date
EP2454520A1 EP2454520A1 (fr) 2012-05-23
EP2454520B1 true EP2454520B1 (fr) 2015-01-28

Family

ID=42557445

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10707290.2A Not-in-force EP2454520B1 (fr) 2010-03-09 2010-03-09 Bande lumineuse

Country Status (2)

Country Link
EP (1) EP2454520B1 (fr)
WO (1) WO2011110217A1 (fr)

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EP3312506A1 (fr) 2016-10-24 2018-04-25 CLD Germany GmbH Bande de diodes électroluminescentes modulaire, entièrement coulée, flexible et son procédé de fabrication
CN107980087A (zh) * 2015-04-29 2018-05-01 伊古齐尼照明有限公司 设有适于控制带的延伸和扭转运动的装置的包括点发光源的带状照明设备
CN109964080A (zh) * 2016-11-23 2019-07-02 昕诺飞控股有限公司 照明条和套件
EP3561369A1 (fr) 2018-04-24 2019-10-30 CLD Germany GmbH Bande de diodes électroluminescentes flexible et entièrement coulée pour grosses sections d'alimentation et son procédé de fabrication
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DE102018117536B4 (de) 2017-07-20 2025-01-23 GM Global Technology Operations LLC Kleine, seitlich emittierende led-lichtleiste

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Cited By (7)

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Publication number Priority date Publication date Assignee Title
CN107980087A (zh) * 2015-04-29 2018-05-01 伊古齐尼照明有限公司 设有适于控制带的延伸和扭转运动的装置的包括点发光源的带状照明设备
EP3312506A1 (fr) 2016-10-24 2018-04-25 CLD Germany GmbH Bande de diodes électroluminescentes modulaire, entièrement coulée, flexible et son procédé de fabrication
CN109964080A (zh) * 2016-11-23 2019-07-02 昕诺飞控股有限公司 照明条和套件
CN109964080B (zh) * 2016-11-23 2021-06-08 昕诺飞控股有限公司 照明条和套件
DE102018117536B4 (de) 2017-07-20 2025-01-23 GM Global Technology Operations LLC Kleine, seitlich emittierende led-lichtleiste
EP3561369A1 (fr) 2018-04-24 2019-10-30 CLD Germany GmbH Bande de diodes électroluminescentes flexible et entièrement coulée pour grosses sections d'alimentation et son procédé de fabrication
US20230332751A1 (en) * 2020-06-03 2023-10-19 Lumileds Llc Flexible lighting device and support structure

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EP2454520A1 (fr) 2012-05-23

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