EP1950491A1 - Spot à DEL - Google Patents

Spot à DEL Download PDF

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Publication number
EP1950491A1
EP1950491A1 EP08075038A EP08075038A EP1950491A1 EP 1950491 A1 EP1950491 A1 EP 1950491A1 EP 08075038 A EP08075038 A EP 08075038A EP 08075038 A EP08075038 A EP 08075038A EP 1950491 A1 EP1950491 A1 EP 1950491A1
Authority
EP
European Patent Office
Prior art keywords
spotlight
support piece
ring
leds
cup
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.)
Withdrawn
Application number
EP08075038A
Other languages
German (de)
English (en)
Inventor
Giancarlo Brando
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.)
Piper Lux Srl
Original Assignee
Piper Lux Srl
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Piper Lux Srl filed Critical Piper Lux Srl
Publication of EP1950491A1 publication Critical patent/EP1950491A1/fr
Withdrawn legal-status Critical Current

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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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/83—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • 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
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F21V19/003—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
    • F21V19/0035—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources the fastening means being capable of simultaneously attaching of an other part, e.g. a housing portion or an optical component
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V15/00—Protecting lighting devices from damage
    • F21V15/01—Housings, e.g. material or assembling of housing parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/30—Lighting for domestic or personal use
    • F21W2131/301—Lighting for domestic or personal use for furniture
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to an LED spotlight, in particular suitable for use as a fitted spotlight.
  • LEDs are light-emitting components which are particularly attractive from a technical point of view. In fact, they have small dimensions, consume a very small amount of power and have an extremely long working life. However, all LED manufacturers point out that the advantageous features in terms of consumption and working life depend greatly on the operating temperature. Moreover, one disadvantage of LEDs is that they produce light which is extremely concentrated.
  • a spotlight comprising three LEDs with three respective lenses for magnifying the light produced by the LEDs is known.
  • the light beam is significantly amplified owing to the lenses, the overall light beam is nevertheless concentrated and unsuitable for illuminating relatively large surfaces.
  • the object of the present invention is to provide an LED spotlight which is particularly suitable for use as a fitted spotlight, with an optimum lighting performance and working life.
  • a spotlight which comprises a support piece and a plurality of LEDs mounted on said support piece, a ring and a cup-shaped member configured so as to contain the support piece, is provided.
  • the ring comprises eyelets which are designed to allow the entry of cooling air and the outflow of heated air.
  • the ring is also provided with openings and the cup-shaped member with empty spaces for introducing cooling air onto a surface of the support piece, and the cup-shaped member is provided with windows for expelling heated air.
  • the cup-shaped member comprises a spotlight body and a cover made of insulating material.
  • the body and the ring can be joined together so as retain between them at the least the support piece.
  • the body and the ring can be joined together by means of a thread.
  • the spotlight also comprises a reflective dish and a diffuser screen.
  • the support piece may consist of Thermal Clad ®.
  • the LEDs are six in number
  • the support piece is in the form of a circular disk and the LEDs are arranged equally spaced circumferentially on the support piece.
  • the spotlight 1 according to an embodiment of the invention comprises a ring 2, an optical dish 4, a printed circuit 5, a spotlight body 6 and an insulating cover 7.
  • the spotlight 1 also comprises a filter or screen 3 between the ring 2 and the optical dish 4.
  • the printed circuit 5 is preferably in the form of a disk.
  • the LEDs 51 are soldered (or fixed in another manner) onto the printed circuit 5, being preferably equally spaced circumferentially. In the preferred embodiment shown in the drawings six LEDs 51 are mounted, but it is obvious that a greater or smaller number of LEDs may be mounted.
  • the printed circuit consists of Thermal Clad ®.
  • the printed circuit 5 has a central hole 53 and two holes 52 in diametrically opposite positions.
  • the holes 52 are used for joining and holding together the printed circuit 5, the body 6 and the insulating cover 7.
  • pull rivets or the like may be used.
  • the central hole 53 instead allows the insertion of power supply wires (not shown) which are connected to suitable soldering pads.
  • the optical dish 4 has a bottom 41 substantially corresponding to the printed circuit 5 and a frustoconical side wall 42.
  • the bottom 41 is provided with holes 43 which in number (and size/position) correspond to the number (and size/position) of the LEDs 51.
  • the optical dish is made of aluminium.
  • the filter 3 is in the form of a disk made of material such as optical methacrylate luminar suitable for diffusing the light produced by the LEDs 51 and reflected by the dish 4.
  • the filter 3 ensures optimum uniformity of light and moreover filters out the laser emissions produced by the LEDs in keeping with the values stipulated by safety regulations for lighting products (1 M).
  • the ring 2 comprises a rim 21 which is preferably circular and preferably has a frustoconical surface, as shown more clearly in Figure 2 .
  • the ring has a flat annular surface 22 ( Figures 1 and 2 ).
  • Eyelets 23 are formed in the rim 21.
  • the eyelets 23 are curved, arranged along a circumference and correspond in number to the number of LEDs 51. In the embodiment shown in the various Figures, there are six eyelets 23.
  • Underneath the annular surface 22 there is a circular neck 24. Openings 25 are formed in the neck 24.
  • the openings are equal in number to the number of LEDs 51 and are not positioned opposite the eyelets 23.
  • the neck 24 is thus formed by teeth 24 configured as to mate by means of screwing with corresponding teeth 66 (which will be described below) formed on the body 6 of the spotlight 1.
  • the body 6 of the spotlight is substantially cup-shaped with a closed bottom 61, which is circular in the preferred embodiment, and a continuous wall 64.
  • the bottom preferably, is provided with a central hole 63 corresponding to the hole 53 in the printed circuit 5 and two diametrically opposite holes 62 corresponding to the holes 52.
  • Windows 65 are formed in the side wall 64, close to the bottom 61. In one embodiment the windows 65 are oval. Preferably, the windows 65 are identical and equally spaced circumferentially. Conveniently, the windows 65 are equal in number to the number of LEDs 51.
  • teeth 66 which alternate with empty spaces 67 are formed.
  • the number of teeth 66 is equal to the number of windows 65.
  • the empty spaces 67 are arranged opposite the windows 65.
  • the outer surface of the teeth 66 is provided with a thread 67 ( Figure 7 ) able to mate with a corresponding thread formed on the inner surface of the teeth 24. Mating between the two threads is clearly illustrated in Figure 4 .
  • the spotlight body 6 is made of aluminium or aluminium alloy for heat dispersion and reduced weight reasons.
  • the side wall 64 is flared from the bottom towards the teeth, as shown in Figures 4 , 5 , 6 and 7 .
  • This has the advantage of increasing the space between it and the insulating cover 7 which will be described immediately hereinbelow.
  • Figure 8 shows a top plan view of the spotlight body 6.
  • the insulating cover 7 also has a substantially cup-shaped form with a substantially closed bottom 71 and continuous side wall 74.
  • the bottom 71 is substantially flat.
  • it has a circular form.
  • a central hole 73 and two holes 72 corresponding, respectively, to the holes 53, 52 in the printed circuit 5 are provided.
  • at least the holes 72 have an inner shoulder 72. In this way, when the spotlight is mounted, the bottom 61 of the spotlight body 6 is spaced from the bottom 71 of the insulating cover 7.
  • FIG. 1 shows a side view of the assembled spotlight.
  • Figures 4 and 5 show cross-sectional views of the assembled spotlight.
  • the spotlight according to the present invention may be mounted so as to project the light upwards or downwards. It has compact dimensions and, conveniently, may be seated inside a suitable recess 10 ( Figure 9 ) formed in a panel, for example a piece of furniture. A particular preferred application is, in a kitchen, as a fitting underneath a wall unit for illumination of a work surface. In a very advantageous embodiment, the spotlight is able to be inserted inside a recess which is only about 15-20 mm deep.
  • the power consumption of the spotlight is very low and the working life very high owing to an air flow which keeps the LEDs always below a critical temperature.
  • FIG. 9 shows in schematic form, by means of arrows, the cooling air flow 8 (right-hand side) and heated air flow 9 which leaves the spotlight (left-hand side).
  • the fresh air 8 at room temperature enters through the eyelets 23 of the ring 2, passes through the openings 25 in the ring and the corresponding empty spaces 67 in the spotlight body 6. Passing between the wall of the body 6 and the wall of the dish 4, the air 8 manages to cool the LEDs 51 and the entire printed circuit 5.
  • a cooling air flow 8 infiltrates between the outer wall of the spotlight body and the insulating cover. This allows improved cooling of the base of the spotlight body.
  • the air 9 which, after being heated, leaves the spotlight, passes through the windows 65, the gap between the body 6 and the cover 7 and the eyelets 23. A part of the air 9 comes from the gap between the bottom 71 of the cover 7 and the bottom 61 of the body 6 and joins to the main flow.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
EP08075038A 2007-01-26 2008-01-15 Spot à DEL Withdrawn EP1950491A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000120A ITMI20070120A1 (it) 2007-01-26 2007-01-26 Faretto a led

Publications (1)

Publication Number Publication Date
EP1950491A1 true EP1950491A1 (fr) 2008-07-30

Family

ID=39166426

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08075038A Withdrawn EP1950491A1 (fr) 2007-01-26 2008-01-15 Spot à DEL

Country Status (2)

Country Link
EP (1) EP1950491A1 (fr)
IT (1) ITMI20070120A1 (fr)

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EP2105652A1 (fr) * 2008-03-28 2009-09-30 Delta Electronics, Inc. Dispositif d'éclairage et sa structure de dissipation thermique
GB2458972A (en) * 2008-08-05 2009-10-07 Photonstar Led Ltd Thermally optimized chip-on-board module
EP2175191A1 (fr) * 2008-10-07 2010-04-14 Ceramate Technical Co., Ltd Lampe combinée insérée dépourvue d'un cylindre abat-jour
EP2177824A1 (fr) * 2008-10-16 2010-04-21 Osram Gesellschaft mit Beschränkter Haftung Agencement de montage pour dispositifs d'éclairage, dispositif d'éclairage correspondant et procédé
WO2010055296A2 (fr) 2008-11-12 2010-05-20 Collingwood Lighting Limited Unité d'éclairage
WO2010039486A3 (fr) * 2008-09-23 2010-06-03 Lsi Industries, Inc. Appareil d’éclairage à système de dissipation thermique
EP2221529A1 (fr) 2009-02-19 2010-08-25 Toshiba Lighting & Technology Corporation Système de lampe et appareil d'éclairage
USD631183S1 (en) 2008-09-23 2011-01-18 Lsi Industries, Inc. Lighting fixture
EP2302298A1 (fr) * 2009-09-25 2011-03-30 Toshiba Lighting & Technology Corporation Appareil d'éclairage
EP2306072A1 (fr) * 2009-10-05 2011-04-06 Lighting Science Group Corporation Lumière à profil bas
WO2011025928A3 (fr) * 2009-08-28 2011-04-14 Firefly Led Lighting Inc. Système d'éclairage à module d'éclairement remplaçable
DE202011002933U1 (de) 2010-02-19 2011-05-19 Corazza, Franco Lampenfassung für LED-Lampen mit verbesserter Stütze
DE202011002611U1 (de) 2010-02-11 2011-05-26 Corazza, Franco Lampenfassung mit transparentem Teil mit integrierter Linse
CN102165249A (zh) * 2009-02-19 2011-08-24 东芝照明技术株式会社 灯装置及照明器具
CN102287656A (zh) * 2011-08-23 2011-12-21 东莞市驰明电子科技有限公司 一种led筒灯
CN101709857B (zh) * 2008-09-16 2012-01-25 东芝照明技术株式会社 光源单元以及使用此光源单元的照明器具
US20120127739A1 (en) * 2010-11-18 2012-05-24 Toshiba Lighting & Technology Corporation Lamp unit and lighting fixture
US8197086B2 (en) 2008-11-24 2012-06-12 Toshiba Lighting & Technology Corporation Lighting fixture
US8232709B2 (en) 2009-10-21 2012-07-31 Toshiba Lighting & Technology Corporation Light-emitting apparatus and luminaire
WO2012164409A1 (fr) * 2011-05-31 2012-12-06 Qck Lezmin 4414 T/A Marulatech Refroidissement de dispositifs à semi-conducteur
EP2587118A1 (fr) * 2011-10-25 2013-05-01 Hella KGaA Hueck & Co. Plafonnier à DEL
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AU2012216275B2 (en) * 2008-09-23 2013-07-18 Lsi Industries, Inc. Lighting apparatus with heat dissipation system
EP2486324A4 (fr) * 2009-10-09 2013-09-04 Intematix Corp Lampes à semi-conducteurs à refroidissement passif
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EP2687776A1 (fr) * 2012-07-20 2014-01-22 Tai-Her Yang Dissipateur de chaleur en forme de coupe ayant un trou de guidage d'écoulement disposé de façon annulaire au niveau de la périphérie inférieure et appliqué dans le corps lumineux électrique
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CN105180120A (zh) * 2015-10-20 2015-12-23 广东雪莱特光电科技股份有限公司 一种led灯用空气对流件
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WO2016089999A1 (fr) * 2014-12-02 2016-06-09 Lighting Science Group, Corporation Dispositif d'éclairage extra-plat et éléments de fixation, et kit les comprenant
US9400100B2 (en) 2009-07-21 2016-07-26 Cooper Technologies Company Interfacing a light emitting diode (LED) module to a heat sink assembly, a light reflector and electrical circuits
US9429294B2 (en) 2013-11-11 2016-08-30 Lighting Science Group Corporation System for directional control of light and associated methods
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JP2017037853A (ja) * 2016-11-18 2017-02-16 東芝ライテック株式会社 照明器具
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US8789978B2 (en) 2007-09-21 2014-07-29 Cooper Technologies Company Light emitting diode recessed light fixture
US8876328B2 (en) 2007-09-21 2014-11-04 Cooper Technologies Company Optic coupler for light emitting diode fixture
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EP2105652A1 (fr) * 2008-03-28 2009-09-30 Delta Electronics, Inc. Dispositif d'éclairage et sa structure de dissipation thermique
US8556460B2 (en) 2008-05-30 2013-10-15 Toshiba Lighting & Technology Corporation Lighting apparatus and light-emitting element mounting substrate having stress absorbing means
US9303855B2 (en) 2008-05-30 2016-04-05 Toshiba Lighting & Technology Corporation Light emitting module having heat conductive substrate
US9279575B2 (en) 2008-05-30 2016-03-08 Kabushiki Kaisha Toshiba Light emitting module having heat conductive substrate
US9410685B2 (en) 2008-05-30 2016-08-09 Toshiba Lighting & Technology Corporation Light emitting module having heat conductive substrate
US8545051B2 (en) 2008-05-30 2013-10-01 Toshiba Lighting & Technology Corporation Lighting apparatus with heat conductive substrate
US8668355B2 (en) 2008-05-30 2014-03-11 Toshiba Lightning & Technology Corporation Light emitting module having heat conductive substrate
GB2458972A (en) * 2008-08-05 2009-10-07 Photonstar Led Ltd Thermally optimized chip-on-board module
GB2458972B (en) * 2008-08-05 2010-09-01 Photonstar Led Ltd Thermally optimised led chip-on-board module
CN101709857B (zh) * 2008-09-16 2012-01-25 东芝照明技术株式会社 光源单元以及使用此光源单元的照明器具
US8128263B2 (en) 2008-09-16 2012-03-06 Toshiba Lighting & Technology Corporation Light source unit and lighting apparatus having light-emitting diodes for light source
AU2009298917B2 (en) * 2008-09-23 2012-08-23 Lsi Industries, Inc. Lighting apparatus with heat dissipation system
US8696171B2 (en) 2008-09-23 2014-04-15 Lsi Industries, Inc. Lighting apparatus with heat dissipation system
US8480264B2 (en) 2008-09-23 2013-07-09 Lsi Industries, Inc. Lighting apparatus with heat dissipation system
AU2012216275B2 (en) * 2008-09-23 2013-07-18 Lsi Industries, Inc. Lighting apparatus with heat dissipation system
US8382334B2 (en) 2008-09-23 2013-02-26 Lsi Industries, Inc. Lighting apparatus with heat dissipation system
AU2013205909B2 (en) * 2008-09-23 2014-07-31 Lsi Industries, Inc. Lighting Apparatus With Heat Dissipation System
USD631183S1 (en) 2008-09-23 2011-01-18 Lsi Industries, Inc. Lighting fixture
US8215799B2 (en) 2008-09-23 2012-07-10 Lsi Industries, Inc. Lighting apparatus with heat dissipation system
AU2012216275B9 (en) * 2008-09-23 2013-07-25 Lsi Industries, Inc. Lighting apparatus with heat dissipation system
WO2010039486A3 (fr) * 2008-09-23 2010-06-03 Lsi Industries, Inc. Appareil d’éclairage à système de dissipation thermique
EP2175191A1 (fr) * 2008-10-07 2010-04-14 Ceramate Technical Co., Ltd Lampe combinée insérée dépourvue d'un cylindre abat-jour
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