EP2159484B1 - Luminaire - Google Patents

Luminaire Download PDF

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Publication number
EP2159484B1
EP2159484B1 EP09007109.3A EP09007109A EP2159484B1 EP 2159484 B1 EP2159484 B1 EP 2159484B1 EP 09007109 A EP09007109 A EP 09007109A EP 2159484 B1 EP2159484 B1 EP 2159484B1
Authority
EP
European Patent Office
Prior art keywords
holder
reflector
light source
led light
leds
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.)
Active
Application number
EP09007109.3A
Other languages
German (de)
English (en)
Other versions
EP2159484A1 (fr
Inventor
Erik Nicolaas Johannes Swennen
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.)
LEDexpert BV
Original Assignee
LEDexpert 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 LEDexpert BV filed Critical LEDexpert BV
Publication of EP2159484A1 publication Critical patent/EP2159484A1/fr
Application granted granted Critical
Publication of EP2159484B1 publication Critical patent/EP2159484B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F11/00—Arrangements in shop windows, shop floors or show cases
    • A47F11/06—Means for bringing about special optical effects
    • A47F11/10—Arrangements of light sources
    • 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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/04—Controlling the distribution of the light emitted by adjustment of elements by movement of reflectors
    • 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
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/34—Supporting elements displaceable along a guiding element
    • F21V21/35—Supporting elements displaceable along a guiding element with direct electrical contact between the supporting element and electric conductors running along the guiding element
    • 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
    • F21V29/73—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements being adjustable with respect to each other, e.g. hinged
    • 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
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • 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
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F21V29/89—Metals
    • 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
    • F21V33/00—Structural combinations of lighting devices with other articles, not otherwise provided for
    • F21V33/0004—Personal or domestic articles
    • F21V33/0012—Furniture
    • 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
    • F21W2131/40—Lighting for industrial, commercial, recreational or military use
    • F21W2131/405—Lighting for industrial, commercial, recreational or military use for shop-windows or displays
    • 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 relates to a luminaire comprising a support to which at least one holder for housing a LED light source is connected, which support and which holder comprise a thermally conductive material and which are thermally interconnected for dissipating the heat generated by the LED(s) during operation, which holder is provided with an optical element which cooperates with the LED light source for generating a light beam during operation.
  • LED light source as used herein is understood to mean a light source which comprises one or more light-emitting diodes (LEDs).
  • LEDs are used in various places.
  • the use of LED lighting has increased enormously in recent years.
  • LEDs have a high luminous efficacy and a long operational life, they are energy-efficient and they are compact. Furthermore, it is possible to adjust the colour of the emitted light when several (“RGB”) LEDs are used.
  • LEDs generate relatively much heat during operation. To prevent overheating of the LED or the printed circuit board on which the LED is provided (for example together with a supply circuit provided thereon), it is necessary to take measures to ensure that the heat is dissipated rapidly. This is all the more necessary in order to prevent a loss of efficacy of the LEDs and to prevent damage.
  • the LEDs are to that end mounted to a support or in a holder made of a thermally conductive material, such as a metal.
  • EP 1 898 146 A1 describes a luminaire comprising a light source provided with one or more LEDs and an optical system comprising a reflector and a lens, whilst the heat generated by the LEDs during operation is adequately dissipated by a support made of a thermally conductive material.
  • the light source described in said application is not very suitable for use in compact luminaires when a user also wishes to influence the direction of the light beam emitted by the LED. Generally, a user must move the entire housing of the luminaire in a selected direction. This is problematic.
  • US 2005/0,281,047 A1 describes a lighting unit with an LED light source and a reflector, which comprises a thermally conductive material.
  • the light source takes up a fixed position relative to the reflector. It is difficult for the user to adjust the light beam from the light source himself or herself.
  • WO 94/23243 A1 describes a lighting unit according to the preamble of claim 1, with a light source in a holder wherein an optical element can adjusted relative to the holder for setting the light beam in a certain direction.
  • the object of the invention is to provide a luminaire comprising a support for an LED light source which efficiently provides adequate cooling of the LEDs by dissipating the heat generated by the LEDS, whilst the direction of the light beam generated by said LEDs is furthermore easy to adjust by a user.
  • a luminaire of the kind referred to in the introduction is characterised in that a user can set various directions of the optical element relative to the holder with the LED light source as desired.
  • a user can set a desired direction of the light beam himself or herself in a simple manner.
  • the holder with the light source remains in place while the direction is being set.
  • the holder consists of a thermally conductive material and is in thermal contact with the LED light source, so that heat from the light source can be dissipated in an adequate manner.
  • the holder functions as a heat sink, therefore. To that end, the holder is connected to the support over a relatively large contact area.
  • the heat resistance between the support and the holder is small (less than 10K per Watt) in that case.
  • a luminaire according to the invention comprises of an extruded aluminium bar configured as a support, for example, to which aluminium holders with the LEDs are mounted.
  • the LEDs are mounted in the holders in a manner which is known per se, for example by means of printed circuit boards comprising a power supply circuit.
  • the heat dissipation of the LEDs is ensured by thermally conductive connections between the LEDs and/or the printed circuit board.
  • the printed circuit board and the support are also in intense thermal contract with each other, preferably with a heat resistance of less than 10K/Watt.
  • the optical element is a reflector.
  • the optical element is preferably a parabolic, spherical, elliptical or hyperbolic reflector having an inlet opening and an outlet opening, wherein the inlet opening is spaced from the holder with the LED light source by some distance, which reflector can be set in various orientations to the holder, and wherein the LED light source is located in or near the focal point of the reflector.
  • the outer wall of the reflector is mounted between the ends of a U-shaped element, which is rotatable about its axis of symmetry relative to the holder, whilst the reflector is rotatable about an axis between the attachment points of the reflector to the U-shaped ends.
  • the luminaire according to the invention can be used in various places.
  • the luminaire according to the invention is provided with an elongated support configured as a conductor rail.
  • One or more holders with LEDs are mounted to the support.
  • the holders are detachable and can be mounted to the support at a selected location by a user.
  • the rail comprises power supply wires for the LEDs.
  • Such conductor rails are frequently used for lighting display windows and shops.
  • the support is mounted in a rib of a display case.
  • Such display cases have walls made of glass or a transparent plastic material, which are oriented perpendicular to each other, for example.
  • the objects to be presented in the display case can be illuminated in an efficient manner and with a high degree of flexibility for a user by the light source that is mounted to a rib.
  • the reflectors can be directed at the objects present in the case in a simple manner by a user.
  • An adequate heat dissipation is realised during operation of the LEDs.
  • high-power LEDs are used in such a display case. High standards are set for the heat dissipation in that case.
  • the luminaire shown in figure 1 comprises an elongated aluminium support 1, to which a holder 2, likewise made of aluminium, is attached, in which holder an LED light source 3 is mounted.
  • Aluminium is a suitable thermally conductive material for dissipating the heat that is generated by the LED (or several LEDs, such as RGD LEDs) during operation.
  • the holder 2 is connected to a reflector 4 (for example a parabolic reflector), which cooperates with the LED light source 3 for generating a light beam during operation.
  • a reflector 4 for example a parabolic reflector
  • the reflector is provided with an inlet opening 5 and an outlet opening 6, which inlet opening 5 is spaced from the LED light source 3 by some distance.
  • the reflector can be placed in various orientations relative to the holder 2, with the LED light source 3 being located in the focal point of the reflector 4.
  • the outer wall of the reflector 4 is mounted between the ends of a U-shaped element 7, which is rotatable about its axis of symmetry 8 relative to the holder 2, whilst the reflector is also rotatable about an axis 9 between the attachment points of the reflector to the ends of the U-shaped element 7.
  • One of said attachment points is indicated at 10 in the drawing.
  • Figure 2 schematically shows a display case.
  • Products can be presented in such a glass case.
  • the case is provided with four glass walls 11 - 14, which are oriented perpendicular to each other and which are interconnected by means of ribs (such as the ribs 16).
  • the glass shelves (such as the shelves 15) for the objects to be presented make the case look transparent. This effect is further enhanced by the lighting that is realised by means of aluminium supports provided with LED light sources and reflectors according to the invention, which are mounted in the ribs. Said units are indicated at 17, 18 and 19, respectively.
  • the ribs are formed and dimensioned such that the electric supply wires for the power supply of the LEDs are arranged within the ribs, electrically insulated therefrom, such that they are hidden from the users' view.
  • the LEDs are Lumileds K2 high-power LEDs, for example.
  • the thermal contacts between the high-power LED light source (for example 5 W), the aluminium printed circuit board and the aluminium support are such that the thermal resistance is at most 3L/Watt. An acceptable temperature difference of 15 degrees is realised in that case.
  • the reflectors attached to the holders of the LEDs can be directed at the objects to be presented on the shelves in a simple manner by a user. Consequently there is no need to mount the light sources to the upper side of the display case, as is necessary with known display cases.
  • the holders with the reflectors can be detached from the support.
  • a holder forms part of an adapter in that case, which adapter is provided with means that are known per se for cooperation with the support, which forms part of a conductor rail, for example.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Claims (4)

  1. Luminaire comprenant un support (1) auquel est raccordé au moins un dispositif de maintien (2) pour loger une source de diode électroluminescente (3), ledit dispositif de maintien (2) est prévu avec un élément optique (4) qui coopère avec la source de diode électroluminescente (3) pour générer un faisceau lumineux pendant le fonctionnement, dans lequel un utilisateur peut régler différentes directions de l'élément optique (4) par rapport au dispositif de maintien (2) avec la source de diode électroluminescente (3), si nécessaire, dans lequel l'élément optique (4) est un réflecteur ayant une ouverture d'entrée (5) et une ouverture de sortie (6), et dans lequel l'ouverture d'entrée (5) est espacée du dispositif de maintien (2) avec la source de diode électroluminescente (3) par une certaine distance, lequel réflecteur peut être réglé dans différentes orientations par rapport au dispositif de maintien (2) et dans lequel la source de diode électroluminescente (3) est positionnée dans ou à proximité du point focal du réflecteur, caractérisé en ce que le support (1) et le dispositif de maintien (2) comprennent un matériau thermiquement conducteur et qui sont thermiquement interconnectés pour dissiper la chaleur générée par la (les) diode(s) électroluminescente (s) pendant le fonctionnement, et dans lequel le côté externe du réflecteur est monté entre les extrémités d'un élément en forme de U (7), qui peut tourner autour de son axe de symétrie par rapport au dispositif de maintien (2), alors que le réflecteur peut tourner autour d'un axe entre les points de fixation du réflecteur sur les extrémités en forme de U.
  2. Rail conducteur prévu avec un luminaire selon la revendication 1.
  3. Rail conducteur selon la revendication 2, caractérisé en ce que les dispositifs de maintien peuvent être détachés du support.
  4. Boîtier d'affichage prévu avec une ou plusieurs nervures (16), dans au moins l'une desquelles nervures (16), est logé un luminaire ou un rail conducteur selon la revendication 1 ou 2.
EP09007109.3A 2008-08-25 2009-05-28 Luminaire Active EP2159484B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL1035864A NL1035864C (nl) 2008-08-25 2008-08-25 Verlichtingsarmatuur.

Publications (2)

Publication Number Publication Date
EP2159484A1 EP2159484A1 (fr) 2010-03-03
EP2159484B1 true EP2159484B1 (fr) 2015-01-07

Family

ID=40193519

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09007109.3A Active EP2159484B1 (fr) 2008-08-25 2009-05-28 Luminaire

Country Status (2)

Country Link
EP (1) EP2159484B1 (fr)
NL (1) NL1035864C (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0350522A1 (fr) * 1986-10-23 1990-01-17 Lighting Technology Incorporated Luminaire à évacuation de chaleur et lampes tungstène-halogène
US20040109310A1 (en) * 2002-12-10 2004-06-10 Robert Galli LED lighting assembly

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3932511A1 (de) * 1989-09-26 1991-04-04 Sk Lichttechnik Gmbh Reflektor
US5161883A (en) * 1989-10-19 1992-11-10 Musco Corporation Means and method for increasing output, efficiency, and flexibility of use of an arc lamp
US5459649A (en) 1991-04-10 1995-10-17 Ellion; M. Edmund Flashlight with an enhanced spot beam and a fully illuminated broad beam
US5833358A (en) * 1995-11-21 1998-11-10 Aci The Display People Extruded track lighting system
WO1998051963A2 (fr) * 1997-05-12 1998-11-19 Hays G Alan Systeme d'eclairage
WO2007145446A2 (fr) * 2006-06-14 2007-12-21 Kyung-Ho Yang Appareil d'éclairage utilisant un aimant
EP1898146A1 (fr) 2006-09-11 2008-03-12 Hella lighting Finland Oy Luminaire encastré à LED

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0350522A1 (fr) * 1986-10-23 1990-01-17 Lighting Technology Incorporated Luminaire à évacuation de chaleur et lampes tungstène-halogène
US20040109310A1 (en) * 2002-12-10 2004-06-10 Robert Galli LED lighting assembly

Also Published As

Publication number Publication date
EP2159484A1 (fr) 2010-03-03
NL1035864C (nl) 2010-03-10

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