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EP1255948A1 - Luminous diode arrangement with a reflector - Google Patents

Luminous diode arrangement with a reflector

Info

Publication number
EP1255948A1
EP1255948A1 EP01925323A EP01925323A EP1255948A1 EP 1255948 A1 EP1255948 A1 EP 1255948A1 EP 01925323 A EP01925323 A EP 01925323A EP 01925323 A EP01925323 A EP 01925323A EP 1255948 A1 EP1255948 A1 EP 1255948A1
Authority
EP
European Patent Office
Prior art keywords
reflector
light
light source
opening
emitting diodes
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.)
Granted
Application number
EP01925323A
Other languages
German (de)
French (fr)
Other versions
EP1255948B1 (en
Inventor
Katharina Keller
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.)
Zumtobel Lighting GmbH Austria
Original Assignee
Zumtobel Staff GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zumtobel Staff GmbH filed Critical Zumtobel Staff GmbH
Publication of EP1255948A1 publication Critical patent/EP1255948A1/en
Application granted granted Critical
Publication of EP1255948B1 publication Critical patent/EP1255948B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • 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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/02—Controlling the distribution of the light emitted by adjustment of elements by movement 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
    • F21V19/00—Fastening of light sources or lamp holders
    • 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
    • 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
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
    • F21V29/763—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section the planes containing the fins or blades having the direction of the light emitting axis
    • 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]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S362/00—Illumination
    • Y10S362/80—Light emitting diode

Definitions

  • the present invention relates to a lamp according to the preamble of claim 1.
  • a generic lamp is known for example from Japanese laid-open publication JP 11-17229.
  • This describes a lighting arrangement in which a single light-emitting diode is arranged within a reflector, so that the light emitted by this light-emitting diode is used for indirect lighting.
  • the arrangement of the light source within a reflector has the advantage that the light emitted by the light-emitting diode in a relatively large solid angle is collected and reflected by the reflector and thus, in comparison to direct illumination by the light-emitting diode, a significantly larger amount of light for the lighting purposes can be used.
  • Such lighting arrangements can be used in optoelectronic components and other display devices because of the very good controllability of the light source.
  • the lighting arrangement described in JP 11-17229 is, however, limited with regard to its possible uses, since the amount of light emitted by the individual diode is not very high and is therefore not sufficient for a number of lighting purposes.
  • the present invention is therefore based on the object of improving the lighting arrangement known from JP 11-7229 in such a way that it is suitable for a large number of possible uses.
  • a lamp which has the features of claim 1.
  • a carrier surface is used as the light source, on which a plurality of light-emitting diodes are arranged.
  • This light source is arranged essentially in the longitudinal axis of a - seen from the light source - concave reflector, so that a large part of the light emitted by the light emitting diodes can be used for the desired lighting purpose.
  • the ratio between the size of the support surface and the opening of the reflector is between 1: 3 and 1:20.
  • the total amount of light is significantly higher than that of a single light-emitting diode.
  • the specified size ratio between the support surface and the reflector is found to be advantageous, since on the one hand sufficiently high luminosities can be achieved in this size range, but on the other hand no shadow casts occur in the light emitted by the reflector due to the support surface arranged in front of or within the reflector.
  • the ratio between the support surface and the opening of the reflector is preferably 1:10.
  • the aforementioned advantage that light-emitting diodes have very good controllability can also be used by arranging light-emitting diodes of different colors together on the support surface.
  • blue light-emitting diodes can also be produced with a relatively high degree of efficiency, so that any desired color tones can be achieved by a suitable combination of these three colors or by correspondingly controlling the light-emitting diodes arranged on the carrier surface.
  • the lamp according to the invention can be used for a variety of applications.
  • a practical embodiment of the invention can therefore consist in that a heat sink is arranged on the back of the carrier surface - that is to say the side opposite the light-emitting diodes - which radiates the generated heat as effectively as possible. Since the weight of the light source is relatively low, the power or control lines for the light-emitting diodes can preferably be used directly to hold the light source. These can span the reflector in the manner of a diameter, for example, so that the light source is arranged essentially in the plane of the reflector opening.
  • the power or control lines used for the holder extend from the inside of the reflector or the center of the reflector in the direction of the reflector opening, so that the distance of the light source from the reflector can be selected.
  • the light source is particularly advantageously in a focal point of the reflector, since this arrangement ensures maximum utilization of the emitted light.
  • Figure 1 shows a lamp according to the invention in a perspective view.
  • 2 shows a more detailed embodiment of the light source according to the invention.
  • Fig. 1 shows a very general embodiment of a lamp according to the invention.
  • An essential element of this lamp is a dome-shaped or concave reflector 1 whose inner walls are highly reflective.
  • a light source 2 is arranged, which consists of a plurality of light-emitting diodes arranged on a support surface.
  • the power supply and the control of the individual light-emitting diodes takes place via current and control lines 5, which span the reflector in diameter from one edge of the reflector opening to the other and at the same time serve as a holder for the light source 2.
  • a particularly advantageous embodiment consists in that the light source 2 is arranged in the focal point of the reflector 1, so that the entire light emitted by the light-emitting diodes in an angular range of 180 ° can be used for the intended lighting purpose.
  • FIG. 2 shows an enlarged illustration of the light source 2 according to the invention.
  • a multiplicity of light-emitting diode chips (dice) 4 are arranged on a carrier surface 3. These can emit light in different colors, so that different colors can be achieved with a suitable control of the light emitting diodes 4 for the light emitted by the lamp as a whole.
  • a heat sink 6 is arranged to increase the heat radiation. This will create a
  • Connection lines 5 serve both the power supply and the transmission of
  • Control signals for the targeted control of the different light-emitting diodes 4 to achieve the desired color are provided.
  • the luminaire Due to the compact arrangement of the light-emitting diode chips, a considerable luminosity can be achieved, so that the luminaire is also suitable for applications in which higher luminosities are required. At the same time, however, the light emitted by the reflector 1 is intended to achieve homogeneous illumination.
  • the size ratio according to the invention between the support surface 3 and the reflector 1 ensures that the light source 2 itself does not cause shadows.
  • the inside of the reflector is that of the Light emitting diodes 4 diffusely reflected light, which also supports mixing of the different colors.
  • the holder shown in Fig. 3a corresponds to the lamp shown in Fig. 1.
  • FIG. 3b An alternative type of suspension is shown in Fig. 3b, in which the power and control lines 5 extend obliquely downwards from the inside of the reflector, which has the advantage that the light source 2 does not necessarily have to be arranged in the plane of the reflector opening, but, for example, can also be arranged further inside the reflector 1 or even protruding.
  • the third holder shown in FIG. 3c in which the light source 2 is formed by a rod-shaped holder 5 which extends from the center of the reflector along the longitudinal axis of the reflector 1 and which can likewise contain the power and control lines.
  • the distance between the light source 2 and the reflector 1 is adjustable, so that the light cone generated by the reflector 1 can be changed by moving it along the longitudinal axis.

Landscapes

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

Abstract

The invention relates to a lighting device comprising a light source (2) provided with at least one light-emitting semiconductor, and a reflector (1) which is concave when seen from said light source (2). The light source (2) is essentially arranged on the longitudinal axis of the reflector (1). According to the invention, the light source (2) consists of a plurality of controllable luminous diodes (4) which are disposed on a supporting surface (3). The ratio of the supporting surface (3) to the opening of the reflector (1) lies between 1:3 and 1:20.

Description

Leuchtdiodenanordnung mit Reflektor LED arrangement with reflector

Die vorliegende Erfindung betrifft eine Leuchte nach dem Oberbegriff des Anspruchs 1.The present invention relates to a lamp according to the preamble of claim 1.

Eine gattungsgemäße Leuchte ist beispielsweise aus der japanischen Offenlegungsschrift JP 11-17229 bekannt. Diese beschreibt eine Beleuchtungsanordnung, bei der eine einzelne Leuchtdiode innerhalb eines Reflektors angeordnet ist, so daß das von dieser Leuchtdiode emittierte Licht zur indirekten Beleuchtung verwendet wird. Die Anordnung der Lichtquelle innerhalb eines Reflektors weist dabei den Vorteil auf, daß das in einem relativ großen Raumwinkel von der Leuchtdiode abgestrahlte Licht durch den Reflektor aufgefangen und reflektiert wird und somit im Vergleich zu einer direkten Beleuchtung durch die Leuchtdiode eine wesentlich größere Lichtmenge für die Beleuchtungszwecke verwertet werden kann.A generic lamp is known for example from Japanese laid-open publication JP 11-17229. This describes a lighting arrangement in which a single light-emitting diode is arranged within a reflector, so that the light emitted by this light-emitting diode is used for indirect lighting. The arrangement of the light source within a reflector has the advantage that the light emitted by the light-emitting diode in a relatively large solid angle is collected and reflected by the reflector and thus, in comparison to direct illumination by the light-emitting diode, a significantly larger amount of light for the lighting purposes can be used.

Derartige Beleuchtungsanordnungen können aufgrund der sehr guten Steuerbarkeit der Lichtquelle in optoelektronischen Bauelementen sowie anderen Anzeigevorrichtungen verwendet werden. Die in der JP 11-17229 beschriebene Beleuchtungsanordnung ist allerdings hinsichtlich ihrer Anwendungsmöglichkeiten beschränkt, da die von der einzelnen Diode abgegebene Lichtmenge nicht sehr hoch und daher für eine Reihe von Beleuchtungszwecken nicht ausreichend ist.Such lighting arrangements can be used in optoelectronic components and other display devices because of the very good controllability of the light source. The lighting arrangement described in JP 11-17229 is, however, limited with regard to its possible uses, since the amount of light emitted by the individual diode is not very high and is therefore not sufficient for a number of lighting purposes.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, die aus der JP 11-7229 bekannte Beleuchtungsanordnung dahingehend zu verbessern, daß diese für eine Vielzahl von Anwendungsmöglichkeiten geeignet ist.The present invention is therefore based on the object of improving the lighting arrangement known from JP 11-7229 in such a way that it is suitable for a large number of possible uses.

Die Aufgabe wird durch eine Leuchte, welche die Merkmale des Anspruches 1 aufweist, gelöst. Erfindungsgemäß wird als Lichtquelle eine Trägerfläche verwendet, auf der eine Vielzahl von Leuchtdioden angeordnet sind. Diese Lichtquelle wird im wesentlichen in der Längsachse eines - von der Lichtquelle aus gesehen - konkaven Reflektors angeordnet, so daß ein Großteil des von den Leuchtdioden abgegebenen Lichts für den gewünschten Beleuchtungszweck genutzt werden kann. Dabei liegt das Verhältnis zwischen der Größe der Trägerfläche und der Öffnung des Reflektors zwischen 1 :3 und 1:20.The object is achieved by a lamp which has the features of claim 1. According to the invention, a carrier surface is used as the light source, on which a plurality of light-emitting diodes are arranged. This light source is arranged essentially in the longitudinal axis of a - seen from the light source - concave reflector, so that a large part of the light emitted by the light emitting diodes can be used for the desired lighting purpose. The ratio between the size of the support surface and the opening of the reflector is between 1: 3 and 1:20.

Das Verwenden einer Vielzahl von Leuchtdioden hat zunächst zur Folge, daß die gesamte Lichtmenge deutlich höher als die einer einzelnen Leuchtdiode ist. Ferner besteht dadurch die Möglichkeit, die Lichtquelle hinsichtlich ihrer gesamten Leuchtstärke in einem wesentlich größeren Bereich aber dennoch sehr exakt zu regulieren und unterschiedliche Helligkeitsstufen einzustellen. Gleichzeitig hat sich allerdings das angegebene Größenverhältnis zwischen der Trägerfläche und dem Reflektor als vorteilhaft herausgestellt, da in diesem Größenbereich einerseits ausreichend hohe Leuchtstärken erzielt werden können, andererseits aber durch die vor oder innerhalb des Reflektors angeordnete Trägerfläche keine Schattenwürfe in dem von dem Reflektor abgestrahlten Licht entstehen. Vorzugsweise beträgt das Verhältnis zwischen der Trägerfläche und der Öffnung des Reflektors 1 : 10.Using a large number of light-emitting diodes initially has the result that the total amount of light is significantly higher than that of a single light-emitting diode. Furthermore, there is the possibility of regulating the light source in terms of its overall luminosity in a much larger area, but still very precisely, and of setting different brightness levels. At the same time However, the specified size ratio between the support surface and the reflector is found to be advantageous, since on the one hand sufficiently high luminosities can be achieved in this size range, but on the other hand no shadow casts occur in the light emitted by the reflector due to the support surface arranged in front of or within the reflector. The ratio between the support surface and the opening of the reflector is preferably 1:10.

Der zuvor erwähnte Vorteil, daß Leuchtdioden eine sehr gute Steuerbarkeit aufweisen, kann ferner auch dadurch genutzt werden, daß Leuchtdioden verschiedener Farben gemeinsam auf der Trägerfläche angeordnet werden. Mittlerweile können neben den bekannten roten und grünen auch blaue Leuchtdioden mit einem relativ hohen Wirkungsgrad hergestellt werden, so daß durch eine geeignete Kombination dieser drei Farben bzw. durch eine entsprechende Ansteuerung der auf der Trägerfläche angeordneten Leuchtdioden beliebige Farbtöne erzielt werden können. Somit kann die erfindungsgemäße Leuchte für eine Vielzahl von Anwendungszwecken verwendet werden.The aforementioned advantage that light-emitting diodes have very good controllability can also be used by arranging light-emitting diodes of different colors together on the support surface. In the meantime, in addition to the known red and green, blue light-emitting diodes can also be produced with a relatively high degree of efficiency, so that any desired color tones can be achieved by a suitable combination of these three colors or by correspondingly controlling the light-emitting diodes arranged on the carrier surface. Thus, the lamp according to the invention can be used for a variety of applications.

Die sehr kompakte Anordnung der lichtemittierenden Halbleiter auf dem Substrat kann zur Folge haben, daß eine relativ hohe Wärmeleistung erzeugt wird. Eine praktische Ausgestaltung der Erfindung kann daher darin bestehen, daß auf der Rückseite der Trägerfläche - also der den Leuchtdioden gegenüberliegenden Seite - ein Kühlkörper angeordnet ist, der die erzeugte Wärmeleistung möglichst effektiv abstrahlt. Da das Gewicht der Lichtquelle relativ gering ist, können vorzugsweise direkt die Strom- oder Steuerleitungen für die Leuchtdioden zur Halterung der Lichtquelle verwendet werden. Diese können beispielsweise den Reflektor durchmesserartig überspannen, so daß die Lichtquelle im wesentlichen in der Ebene der Reflektoröffnung angeordnet ist. Eine weitere Möglichkeit kann allerdings auch darin bestehen, daß sich die für die Halterung verwendeten Strom- oder Steuerleitungen von der Reflektorinnenseite bzw. dem Reflektorzentrum aus in Richtung der Reflektoröffnung erstrecken, so daß der Abstand der Lichtquelle von dem Reflektor wählbar ist. Besonders vorteilhaft befindet sich die Lichtquelle in einem Brennpunkt des Reflektors, da diese Anordnung eine maximale Verwertung des abgegebenen Lichts gewährleistet.The very compact arrangement of the light-emitting semiconductors on the substrate can result in a relatively high thermal output being generated. A practical embodiment of the invention can therefore consist in that a heat sink is arranged on the back of the carrier surface - that is to say the side opposite the light-emitting diodes - which radiates the generated heat as effectively as possible. Since the weight of the light source is relatively low, the power or control lines for the light-emitting diodes can preferably be used directly to hold the light source. These can span the reflector in the manner of a diameter, for example, so that the light source is arranged essentially in the plane of the reflector opening. Another possibility, however, can also be that the power or control lines used for the holder extend from the inside of the reflector or the center of the reflector in the direction of the reflector opening, so that the distance of the light source from the reflector can be selected. The light source is particularly advantageously in a focal point of the reflector, since this arrangement ensures maximum utilization of the emitted light.

Im folgenden soll die Erfindung anhand der beiliegenden Zeichnung näher erläutert werden.The invention will be explained in more detail below with reference to the accompanying drawing.

Es zeigen:Show it:

Fig. 1 eine erfindungsgemäße Leuchte in perspektivischer Darstellung; Fig. 2 eine nähere Ausgestaltung der erfindungsgemäßen Lichtquelle; undFigure 1 shows a lamp according to the invention in a perspective view. 2 shows a more detailed embodiment of the light source according to the invention; and

Fig. 3a bis 3c verschiedene Halterungsmöglichkeiten für die Lichtquelle.3a to 3c different mounting options for the light source.

Fig. 1 zeigt ein sehr allgemeines Ausführungsbeispiel einer erfindungsgemäßen Leuchte. Wesentliches Element dieser Leuchte ist ein kuppeiförmiger bzw. konkaver Reflektor 1 dessen Innenwände hoch-reflektierend sind. Im Schnittpunkt der Längsachse des Reflektors 1 mit seiner Öffπungsebene ist eine Lichtquelle 2 angeordnet, die aus einer Vielzahl von auf einer Trägerfläche angeordneten Leuchtdioden besteht. Die Stromversorgung und das Ansteuern der einzelnen Leuchtdioden erfolgt über Strom- und Steuerleitungen 5, die den Reflektor durchmesserartig von einem Rand der Reflektoröffnung zum anderen überspannen und zugleich als Halterung für die Lichtquelle 2 dienen. Eine besonders vorteilhafte Ausgestaltung besteht darin, daß die Lichtquelle 2 im Brennpunkt des Reflektors 1 angeordnet ist, so daß das gesamte in einem Winkelbereich von 180° nach oben abgestrahlte Licht der Leuchtdioden für den vorgesehenen Beleuchtungszweck verwendet werden kann.Fig. 1 shows a very general embodiment of a lamp according to the invention. An essential element of this lamp is a dome-shaped or concave reflector 1 whose inner walls are highly reflective. At the intersection of the longitudinal axis of the reflector 1 with its opening plane, a light source 2 is arranged, which consists of a plurality of light-emitting diodes arranged on a support surface. The power supply and the control of the individual light-emitting diodes takes place via current and control lines 5, which span the reflector in diameter from one edge of the reflector opening to the other and at the same time serve as a holder for the light source 2. A particularly advantageous embodiment consists in that the light source 2 is arranged in the focal point of the reflector 1, so that the entire light emitted by the light-emitting diodes in an angular range of 180 ° can be used for the intended lighting purpose.

Fig. 2 zeigt eine vergrößerte Darstellung der erfindungsgemäßen Lichtquelle 2. Auf einer Trägerfläche 3 sind dabei eine Vielzahl von Leuchtdioden-Chips (dice) 4 angeordnet. Diese können Licht in jeweils unterschiedlichen Farben emittieren, so daß bei einer geeigneten Ansteuerung der Leuchtdioden 4 für das von der Leuchte insgesamt abgegebene Licht unterschiedliche Farbtöne erzielt werden können. An der den2 shows an enlarged illustration of the light source 2 according to the invention. A multiplicity of light-emitting diode chips (dice) 4 are arranged on a carrier surface 3. These can emit light in different colors, so that different colors can be achieved with a suitable control of the light emitting diodes 4 for the light emitted by the lamp as a whole. On the the

Leuchtdioden 4 gegenüberliegenden Seite der Trägerfläche 3 ist dabei zu einer Erhöhung der Wärmeabstrahlung ein Kühlkörper 6 angeordnet. Hierdurch wird eineLight-emitting diodes 4 on the opposite side of the carrier surface 3, a heat sink 6 is arranged to increase the heat radiation. This will create a

Überhitzung der gesamten Lichtquelle 2 und somit eine Beeinträchtigung desOverheating of the entire light source 2 and thus an impairment of the

Wrkungsgrads oder gar eine Beschädigung der Leuchtdioden 4 vermieden. Die beidenWrkungsgrads or even damage to the LEDs 4 avoided. The two

Anschlußleitungen 5 dienen sowohl der Stromversorgung als auch der Übertragung vonConnection lines 5 serve both the power supply and the transmission of

Steuersignalen zum gezielten Ansteuern der unterschiedlichen Leuchtdioden 4 zum Erzielen des gewünschten Farbtones.Control signals for the targeted control of the different light-emitting diodes 4 to achieve the desired color.

Durch die kompakte Anordnung der Leuchtdioden-Chips kann eine beachtliche Leuchtstärke erzielt werden, so daß die Leuchte auch für Anwendungszwecke geeignet ist, in denen höhere Leuchtstärken benötigt werden. Gleichzeitig soll jedoch durch das von dem Reflektor 1 abgestrahlte Licht eine homogene Beleuchtung erzielt werden. Das erfindungsgemäß angegebene Größenverhältnis zwischen der Trägerfläche 3 und dem Reflektor 1 stellt dabei sicher, daß die Lichtquelle 2 selbst keinen Schattenwurf verursacht. Um das Erzeugen einer gleichmäßigen Lichtabstrahlung zusätzlich zu unterstützen, kann vorgesehen sein, daß die Reflektorinnenseite das von den Leuchtdioden 4 abgegebene Licht diffus reflektiert, was ferner auch ein Vermischen der verschiedenen Farbtöne unterstützt.Due to the compact arrangement of the light-emitting diode chips, a considerable luminosity can be achieved, so that the luminaire is also suitable for applications in which higher luminosities are required. At the same time, however, the light emitted by the reflector 1 is intended to achieve homogeneous illumination. The size ratio according to the invention between the support surface 3 and the reflector 1 ensures that the light source 2 itself does not cause shadows. In order to additionally support the generation of uniform light radiation, it can be provided that the inside of the reflector is that of the Light emitting diodes 4 diffusely reflected light, which also supports mixing of the different colors.

Anhand der Figuren 3a bis 3c sollen nunmehr verschiedene Halterungsmöglichkeiten für die Lichtquelle 2 innerhalb des kuppelartigen Reflektors 1 erläutert werden.Various mounting options for the light source 2 within the dome-like reflector 1 will now be explained with reference to FIGS. 3a to 3c.

Die in Fig. 3a dargestellte Halterung entspricht dabei der in Fig. 1 dargestellten Leuchte. Als Halterung für die Lichtquelle 2 dienen dabei die Strom- bzw. Steuerleitungen 5, die vom Rand des Reflektors 1 aus diesen durchmesserartig überspannen, wobei die Lichtquelle 2 genau in der Mitte und somit in der Längsachse des Reflektors 1 angeordnet ist.The holder shown in Fig. 3a corresponds to the lamp shown in Fig. 1. The current and control lines 5, which span the diameter of the reflector 1 from the edge of the reflector 1, serve as the holder for the light source 2, the light source 2 being arranged exactly in the middle and thus in the longitudinal axis of the reflector 1.

Eine dazu alternative Aufhängungsart ist in Fig. 3b dargestellt, in der sich die Strom- und Steuerleitungen 5 von der Innenseite des Reflektors schräg nach unten erstrecken, was den Vorteil hat, daß die Lichtquelle 2 nicht unbedingt in der Ebene der Reflektoröffnung angeordnet sein muß, sondern beispielsweise auch weiter innerhalb des Reflektors 1 oder sogar hervorstehend angeordnet sein kann. Diese Möglichkeit besteht auch bei der dritten in Fig. 3c dargestellten Halterung, bei der die Lichtquelle 2 durch eine sich von dem Reflektorzentrum aus entlang der Längsachse des Reflektors 1 erstreckende stabförmige Halterung 5 gebildet wird, die gleichfalls die Strom- und Steuerleitungen beinhalten kann. Hier kann beispielsweise auch vorgesehen sein, daß die Lichtquelle 2 in ihrem Abstand zu dem Reflektor 1 verstellbar ist, so daß durch ein Verschieben entlang der Längsachse der durch den Reflektor 1 erzeugte Lichtkegel verändert werden kann. An alternative type of suspension is shown in Fig. 3b, in which the power and control lines 5 extend obliquely downwards from the inside of the reflector, which has the advantage that the light source 2 does not necessarily have to be arranged in the plane of the reflector opening, but, for example, can also be arranged further inside the reflector 1 or even protruding. This possibility also exists in the third holder shown in FIG. 3c, in which the light source 2 is formed by a rod-shaped holder 5 which extends from the center of the reflector along the longitudinal axis of the reflector 1 and which can likewise contain the power and control lines. Here it can also be provided, for example, that the distance between the light source 2 and the reflector 1 is adjustable, so that the light cone generated by the reflector 1 can be changed by moving it along the longitudinal axis.

Claims

Ansprüche Expectations 1. Leuchte mit einer Lichtquelle (2), die mindestens einen lichtemittierenden Halbleiter aufweist, und mit einem - von der Lichtquelle (2) aus gesehen - konkaven Reflektor (1), wobei die Lichtquelle (2) im wesentlichen in der Längsachse des Reflektors (1) angeordnet ist, dadurch gekennzeichnet, daß die Lichtquelle (2) aus einer Vielzahl von auf einer Trägerfläche (3) angeordneten und steuerbaren Leuchtdioden (4J besteht und das Verhältnis zwischen der Trägerfläche (3) und der Öffnung des Reflektors (1) zwischen 1:3 und 1:20 liegt.1. Luminaire with a light source (2), which has at least one light-emitting semiconductor, and with a - from the light source (2) - concave reflector (1), the light source (2) essentially in the longitudinal axis of the reflector ( 1), characterized in that the light source (2) consists of a plurality of controllable light-emitting diodes (4J) arranged and controllable on a support surface (3) and the ratio between the support surface (3) and the opening of the reflector (1) between 1 : 3 and 1:20 lies. 2. Leuchte nach Anspruch 1, dadurch gekennzeichnet, daß das Verhältnis zwischen der Trägerfläche (3) und der Öffnung des Reflektors (1) 1: 10 beträgt.2. Light according to claim 1, characterized in that the ratio between the support surface (3) and the opening of the reflector (1) is 1:10. 3. Leuchte nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Leuchtdioden (4) Licht in verschiedenen Farben emittieren.3. Luminaire according to claim 1 or 2, characterized in that the light emitting diodes (4) emit light in different colors. 4. Leuchte nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Lichtquelle (2) von Strom- bzw. Steuerleitungen (5) gehalten wird.4. Luminaire according to one of claims 1 to 3, characterized in that the light source (2) is held by power or control lines (5). 5. Leuchte nach Anspruch 4, dadurch gekennzeichnet, daß die Strom- bzw. Steuerleitungen (5) die Reflektoröffnung überspannen.5. Luminaire according to claim 4, characterized in that the power or control lines (5) span the reflector opening. 6. Leuchte nach Anspruch 4, dadurch gekennzeichnet, daß sich die Strom- bzw. Steuerleitungen (5) von der Reflektorinnenseite bzw. dem Reflektorzentrum zu der Reflektoröffnung erstrecken.6. Luminaire according to claim 4, characterized in that the power or control lines (5) extend from the inside of the reflector or the center of the reflector to the reflector opening. 7. Leuchte nach Anspruch 6, dadurch gekennzeichnet, daß die Lichtquelle (2) in ihrem Abstand zu dem Reflektor (1) verstellbar ist.7. Lamp according to claim 6, characterized in that the light source (2) is adjustable in its distance from the reflector (1). 8. Leuchte nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Lichtquelle (2) in einem Brennpunkt des Reflektors (1) angeordnet ist.8. Lamp according to one of claims 1 to 6, characterized in that the light source (2) is arranged in a focal point of the reflector (1). 9. Leuchte nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß die Innenseite des Reflektors (1) diffus reflektierend ist.9. Lamp according to one of the preceding claims, characterized in that the inside of the reflector (1) is diffusely reflective. 10. Leuchte nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß an der Unterseite der Trägerfläche (3) ein Kühlkörper (6) angeordnet ist. 10. Lamp according to one of the preceding claims, characterized in that a heat sink (6) is arranged on the underside of the support surface (3).
EP01925323A 2000-02-14 2001-01-29 Luminous diode arrangement with a reflector Expired - Lifetime EP1255948B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE20002565U 2000-02-14
DE20002565U DE20002565U1 (en) 2000-02-14 2000-02-14 LED arrangement with reflector
PCT/EP2001/000934 WO2001059359A1 (en) 2000-02-14 2001-01-29 Luminous diode arrangement with a reflector

Publications (2)

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EP1255948A1 true EP1255948A1 (en) 2002-11-13
EP1255948B1 EP1255948B1 (en) 2008-03-12

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EP01925323A Expired - Lifetime EP1255948B1 (en) 2000-02-14 2001-01-29 Luminous diode arrangement with a reflector

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US (1) US6857763B2 (en)
EP (1) EP1255948B1 (en)
AT (1) ATE389143T1 (en)
AU (1) AU2001252121A1 (en)
DE (2) DE20002565U1 (en)
WO (1) WO2001059359A1 (en)

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Also Published As

Publication number Publication date
EP1255948B1 (en) 2008-03-12
WO2001059359A1 (en) 2001-08-16
ATE389143T1 (en) 2008-03-15
US20020191398A1 (en) 2002-12-19
AU2001252121A1 (en) 2001-08-20
US6857763B2 (en) 2005-02-22
DE20002565U1 (en) 2001-06-28
DE50113726D1 (en) 2008-04-24

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