EP2697559A1 - Luminaire - Google Patents

Luminaire

Info

Publication number
EP2697559A1
EP2697559A1 EP12716236.0A EP12716236A EP2697559A1 EP 2697559 A1 EP2697559 A1 EP 2697559A1 EP 12716236 A EP12716236 A EP 12716236A EP 2697559 A1 EP2697559 A1 EP 2697559A1
Authority
EP
European Patent Office
Prior art keywords
led
lamp
leds
luminaire
reflector
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
EP12716236.0A
Other languages
German (de)
French (fr)
Other versions
EP2697559B1 (en
Inventor
Bernd Schwarz
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.)
Eaton Protection Systems IP GmbH and Co KG
Original Assignee
Cooper Crouse Hinds 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 Cooper Crouse Hinds GmbH filed Critical Cooper Crouse Hinds GmbH
Publication of EP2697559A1 publication Critical patent/EP2697559A1/en
Application granted granted Critical
Publication of EP2697559B1 publication Critical patent/EP2697559B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/27—Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
    • F21K9/272—Details of end parts, i.e. the parts that connect the light source to a fitting; Arrangement of components within end parts
    • 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
    • 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
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/68—Details of reflectors forming part of the light source
    • 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
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/16—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting
    • F21V17/164—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting the parts being subjected to bending, e.g. snap joints
    • 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
    • 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
    • F21V7/04—Optical design
    • F21V7/09—Optical design with a combination of different curvatures
    • 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
    • F21Y2101/00—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
    • 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
    • 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 LEDs are thus arranged one behind the other along the length of the luminaire, and the emitted light is emitted by the luminaire only after a corresponding reflection on the luminaire.
  • the reflection takes place in such a way that the corresponding solid angle ranges of all LEDs overlap at least partially, whereby a corresponding overlap also takes place correspondingly in the case of the most widely spaced LEDs.
  • the at least partial overlap occurs already at a distance of at least 0.2 to 2.5 times the distance of the most widely spaced LEDs. This means that with a maximum distance of the LEDs within the luminaire of, for example, one meter the furthest spaced LEDs overlap with their solid angle ranges already in 20 cm or at least at a distance of 2, 5 meters from the lamp base.
  • the LEDs are still perceived as punctiform single light sources. Furthermore, the intensity of the LEDs is correspondingly weakened or at least distributed over a larger area by the corresponding reflection and distribution of their light output, so that no damaging effects can occur for the eyes of an observer.
  • the corresponding light distribution and indirect emission of light via the luminaire reflector is correspondingly weakened or at least distributed over a larger area by the corresponding reflection and distribution of their light output, so that no damaging effects can occur for the eyes of an observer.
  • the LEDs can be arranged in part closer relative to one another or else in smaller groups.
  • the luminaire reflector in the longitudinal direction of the lamp is rectilinear. D. h., Until possibly on end portions of the luminaire reflector, this extends in the lamp longitudinal direction straight without curvatures.
  • the luminaire reflector in the transverse direction of the luminaire can be composed of a number of substantially planar or curved reflector surfaces. Depending on the arrangement of these reflector surfaces results in a corresponding light distribution in the transverse direction of the lamp, which can also be modeled on a fluorescent tube or the like in terms of their emission.
  • the various reflector surfaces may be inclined relative to each other to define an illumination angle common to all LEDs.
  • a corresponding illumination angle of at least LEDs arranged along a row can be 30 °, 40 ° or even 45 °. Other illumination angles are also possible.
  • two or more groups of LEDs are arranged side by side in the transverse direction of the lamp. This corresponds, for example, to the arrangement of two or more fluorescent tubes.
  • groups of LEDs it is also possible to define a specific illumination angle for each group by arranging the reflector surfaces. The illumination angles of each group of LEDs may be different.
  • each LED group is associated with an LED carrier. This makes the LED groups separately manageable and interchangeable.
  • the lamp may have a luminaire housing with at least in the light emission direction transparent or translucent housing part. It is also conceivable that the luminaire housing is open in the light emission direction.
  • the luminaire reflector can be releasably held.
  • the corresponding holding can be done by screwing or the like. It is also conceivable that the lights reflector is latched to lateral end portions in the lamp housing, so that no further measures for attachment must be taken.
  • the luminaire reflector can also form a fixed unit with the luminaire housing.
  • the LEDs can be designed in the appropriate type of protection such as Ex-d or Ex-m. This can be done by the LEDs are shed with associated cooling surface or heat sink.
  • the LEDs can be formed by an LED strip with a corresponding number of LEDs. This strip is placed on the cooling surface and covered with a cover for all LEDs of the corresponding strip. This cover can then be cast along its entire circumference by a corresponding potting compound relative to the holder of the LEDs, that the appropriate type of protection is realized.
  • the arrangement of the corresponding LED carrier may preferably be such that they are arranged outside the reflected solid angle range of each LED.
  • Figure 3 is a partial longitudinal section through the lights of Figure 2 in the region of an LED group.
  • FIG. 1 shows a cross section, see luminaire transverse direction 1 1, through a first exemplary embodiment of a luminaire 1 according to the invention.
  • This has two groups of LEDs 2, see LED groups 16 and 17. Both LED groups 16 and 17 are on one LED carrier 5 arranged. This forms at the same time a heat sink with corresponding cooling fins 19.
  • the LED groups 16, 17 are arranged at a specific LED distance 4 on the associated carrier, see also Figure 3. All LEDs 2 are arranged on an LED strip, which on a corresponding cooling surface of the LED support 5 rests.
  • the LEDs 2 are covered by a cover housing 27, which is encapsulated with the carrier 5, for example, so that the LEDs are formed in a corresponding type of protection such as Ex-d or Ex-m.
  • the LEDs 2 of the respective groups 16 and 17 are inclined outwardly.
  • Each LED emits light in a certain solid angle range 6, which is characterized in Fig. 1 by the different emanating from the LEDs 2 rays.
  • the entire solid angle region 6 impinges on different flat reflector surfaces 12, 13, 14, which together form a luminaire reflector 8.
  • light in the solid angle region 6 is emitted indirectly from the luminaire, see also the corresponding solid angle ranges below the luminaire 1, which have corresponding illumination angles 15.
  • the associated light emission direction 26 is directed away from the lamp 1 to a viewer.
  • Each of the solid angle regions 6 has an emission means 7 around which the solid angle region 6 extends, see also the following figures.
  • the corresponding reflector surfaces On the basis of the arrangement of the corresponding reflector surfaces, there are essentially two solid angle regions 6, which are each assigned to a group 16, 17, see also the illumination regions 22 and 23 and the associated illumination angles 15, which are each arranged around a corresponding emission center direction 7.
  • the two solid angle regions 6 overlap at least in adjacent regions of the illumination regions 22 and 23.
  • FIG. 2 shows a section analogous to FIG. 1 through a second exemplary embodiment of a luminaire 1 according to the invention.
  • the LEDs 2 are arranged separately from one another as LED groups 16 and 17 at lateral ends within the corresponding luminaire housing 20.
  • Each LED group 16 or 17 has a carrier 5 and 18, which may be constructed analogously to the carrier of Figure 1.
  • Each of these carriers comprises at least one heat sink and a cover housing 27 for the LEDs 2 arranged in a row one behind the other in the longitudinal direction of the lamp.
  • the shape of the light housing 20 of FIG. 2 corresponds to that of FIG. 1.
  • end portions 24 and 25 of the luminaire reflector 8 are releasably secured within the lamp housing 20 by latching.
  • the same locking elements are used in the interior of the lamp housing 20, see in particular inwardly projecting latching hooks 29.
  • the corresponding LEDs 2 in ignition protection Ex-d or Ex-m are formed.
  • FIG. 3 shows a partial representation of a longitudinal section through a luminaire 1 according to FIG. 2, wherein the longitudinal section runs exactly along the LEDs 2 of an LED carrier 5 and 18 arranged linearly one behind the other.
  • the lamp 1 is shown in Fig. 3 in half, see corresponding central axis 28, wherein the parts of the lamp discussed here are arranged in the same way in both halves of the lamp.
  • the various LEDs 2 are arranged in the lamp longitudinal direction 3 with a corresponding LED spacing 4 on the associated LED carrier 5.
  • FIG. 3 how the different solid angle regions 6 of the LEDs 2 arranged behind one another overlap with one another after reflection at the luminaire reflector 8, see the different reflection at respectively angles of 20 ° to the emission direction 7 or also the further reflections at respectively 60 ° or 40 ° Relative to this Abstrahlstofftechnisch 7.
  • the corresponding angle of 120 ° of the solid angle range 6 corresponds to the maximum radiation angle of the LEDs used here 2.
  • the LED distance 4 and the corresponding number of LEDs 2 in the longitudinal direction 3 are selected so that the am LEDs 2 in their reflected solid angle ranges 6 in a at least partially overlap speaking illumination surface distance 9, said illumination surface spacing 9 corresponds to at least 0.2 to 2.5 times the corresponding distance of the LEDs 2 spaced furthest apart.
  • the illumination surface distance 9 is measured by an underside 10 of the luminaire 1, which essentially corresponds to the underside of a transparent or translucent housing part 21.
  • the distance between the furthest spaced LEDs 2 of Fig. 3 corresponds to the distance from the leftmost in Fig. 3 arranged LED 2 to the not shown in the half rightmost LED 2.
  • FIG. 3 shows some solid angle ranges 6 of adjacent LEDs 2 for an opening angle of 20 ° of the corresponding regions around the emission direction 7. These too already overlap, which applies analogously to larger angles of the corresponding solid angle ranges with regard to more widely spaced LEDs 2.
  • the illumination image of the LEDs essentially corresponds to that of a fluorescent tube or of two fluorescent tubes arranged next to one another, see, for example, FIG. 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Led Device Packages (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)

Abstract

A luminaire (1) has a plurality of LEDs (2), which are arranged in series in the luminaire longitudinal direction (3) in each case with an LED spacing (4) by means of an LED mount (5). Each LED emits light in a specific spatial angle range (6) about an emission mid-direction (7). The spatial angle range is directed in the direction towards a luminaire reflector (8) for indirect light emission of the luminaire. The number of LEDs and/or LED spacing are selected such that spatial angle ranges of all of the LEDs after reflection on the luminaire reflector at least partially overlap one another at an illumination area spacing (9) from a lower side (10) of the luminaire of at least from 0.2 to 2.5 times the spacing between the LEDs which are spaced the furthest apart from one another. This results in a luminaire in which a large number of corresponding light-emitting means can be used in a simple manner and without any glare or at least with a markedly reduced glare in order to replace fluorescent tubes or the like as conventional light-emitting means, for example.

Description

Leuchte  lamp
Durch das Einführen von Licht emittierenden Dioden als Lichtquellen ergibt sich die Möglichkeit, eine Reihe von sonst üblichen Lichtquellen durch solche LEDs zu ersetzen. Allerdings zeichnen sich LEDs durch spezifische Besonderheiten aus, die einen weiteren Ein- satz solcher Lichtquellen erschweren. By introducing light-emitting diodes as light sources, it is possible to replace a number of conventional light sources with such LEDs. However, LEDs are characterized by specific peculiarities that make further use of such light sources more difficult.
Beispielsweise sind LEDs punktförmige Lichtquellen, die auch auf diese Weise von einem Betrachter wahrgenommen werden. Selbst wenn eine Vielzahl solcher Lichtquellen verwendet wird, ergibt sich insbesondere bei direkter Beleuchtung eine entsprechende Vielzahl von punktförmigen Lichtquellen und es können entsprechende Schatten aufgrund der Verwendung dieser Vielzahl von LEDs auftreten, die insgesamt die Ausleuchtung mittels dieser Lichtquellen erschweren. For example, LEDs are point-shaped light sources, which are also perceived in this way by a viewer. Even if a plurality of such light sources is used, a corresponding plurality of punctiform light sources results, in particular under direct illumination, and corresponding shadows can occur due to the use of this plurality of LEDs, which altogether complicate the illumination by means of these light sources.
Weiterhin ist eine LED eine sehr intensive Lichtquelle, die leicht zu einem Blendeffekt führt und gegebenenfalls sogar zu einer gesundheitsschädlichen Beeinflussung des Auges eines Betrachters führt. Diese Nachteile zeichnen sich umso mehr ab, wenn eine Mehrzahl oder Vielzahl solcher LEDs in linearer Anordnung vorgesehen sind. Furthermore, an LED is a very intense light source, which easily leads to a glare effect and possibly even leads to a harmful influence on the eye of an observer. These disadvantages are more pronounced when a plurality or plurality of such LEDs are provided in a linear arrangement.
Bei solchen Lichtquellen ist weiterhin zu beachten, dass die erzeugte Wärme nicht vernachlässigt werden kann und gegebenenfalls separate Maßnahmen zur Kühlung und dergleichen ergriffen werden müssen. Der Erfindung liegt die Aufgabe zugrunde, eine Leuchte mit LEDs bereitzustellen, bei der eine Vielzahl solcher Leuchtmittel in einfacher Weise und ohne die vorangehend genannten Nachteile einsetzbar sind oder diese stark vermindert, um beispielsweise Leuchtstoffröhren oder dergleichen als übliche Leuchtmittel zu ersetzen. In such light sources is further noted that the heat generated can not be neglected and possibly separate measures for cooling and the like must be taken. The invention has for its object to provide a luminaire with LEDs, in which a plurality of such bulbs can be used in a simple manner and without the aforementioned disadvantages or greatly reduced, for example, to replace fluorescent tubes or the like as usual bulbs.
Erfindungsgemäß sind eine entspreche Mehrzahl von LEDs in Leuchtenlängsrichtung hintereinander in einem LED-Abstand mittels eines LED-Trägers angeordnet. Jede LED gibt Licht in einem bestimmten Raumwinkelbereich um eine Abstrahlmittelrichtung ab. Jeder Raumwinkelbereich einer LED ist in Richtung zu einem Leuchtenreflektor zur indirekten Lichtemission der Leuchte gerichtet. LED-Anzahl und/oder LED-Abstand sind so gewählt, dass die Raumwinkelbereiche aller LEDs nach Reflektion am Leuchtenreflektor zumindest teilweise in einem Beleuchtungsflächenabstand von einer Unterseite der Leuchte von zumindest dem 0,2 bis 2,5 fachen des Abstandes der voneinander weitest beabstandeten LEDs überlappen. According to the invention, a corresponding plurality of LEDs in the longitudinal direction of the luminaire are arranged behind one another in an LED spacing by means of an LED carrier. Each LED emits light in a certain solid angle range around a Abstrahlmittelrichtung. Each solid angle range of an LED is directed towards a luminaire reflector for indirect light emission of the luminaire. LED number and / or LED distance are selected so that the solid angle ranges of all LEDs after reflection on the luminaire reflector overlap at least partially in a lighting surface distance from a bottom of the lamp of at least 0.2 to 2.5 times the distance of the spaced apart LEDs.
Erfindungsgemäß sind somit die LEDs alle hintereinander entlang der Leuchtenlängsrich- tung angeordnet und das abgegebene Licht wird erst nach einer entsprechenden Reflek- tion am Leuchten reflektor von der Leuchte abgegeben. Gleichzeitig erfolgt die Reflektion in der Weise, dass die entsprechenden Raumwinkelbereiche aller LEDs zumindest teilweise überlappen, wobei ein entsprechender Überlapp auch bei den weitest beabstandeten LEDs entsprechend stattfindet. Um in einem entsprechenden Abstand zur Leuchte zu gewährleisten, dass ein solcher Überlapp für entsprechende Betrachter stattfindet, erfolgt der zumindest teilweise Überlapp bereits ab einem Abstand von zumindest dem 0,2 bis 2,5 fachen des Abstandes der weitest beabstandeten LEDs. Dies bedeutet, dass bei einem maximalen Abstand der LEDs innerhalb der Leuchte von beispielsweise einem Meter die weitest beabstandeten LEDs mit ihren Raumwinkelbereichen bereits in 20 cm oder zumindest bei einem Abstand von 2, 5 Metern von der Leuchtenunterseite entsprechend überlappen. According to the invention, the LEDs are thus arranged one behind the other along the length of the luminaire, and the emitted light is emitted by the luminaire only after a corresponding reflection on the luminaire. At the same time, the reflection takes place in such a way that the corresponding solid angle ranges of all LEDs overlap at least partially, whereby a corresponding overlap also takes place correspondingly in the case of the most widely spaced LEDs. In order to ensure, at a suitable distance from the luminaire, that such an overlap takes place for corresponding observers, the at least partial overlap occurs already at a distance of at least 0.2 to 2.5 times the distance of the most widely spaced LEDs. This means that with a maximum distance of the LEDs within the luminaire of, for example, one meter the furthest spaced LEDs overlap with their solid angle ranges already in 20 cm or at least at a distance of 2, 5 meters from the lamp base.
Auf diese Weise wird verhindert, dass die LEDs noch als punktförmige Einzellichtquellen wahrgenommen werden. Weiterhin sind die LEDs in ihrer Intensität durch die entsprechende Reflektion und Verteilung ihrer Lichtabgabe entsprechend geschwächt oder zu- mindest auf eine größere Fläche verteilt, sodass keine schädigenden Effekte für Augen eines Betrachters auftreten können. Die entsprechende Lichtverteilung und indirekte Abgabe des Lichts erfolgt über den Leuchtenreflektor. In this way it is prevented that the LEDs are still perceived as punctiform single light sources. Furthermore, the intensity of the LEDs is correspondingly weakened or at least distributed over a larger area by the corresponding reflection and distribution of their light output, so that no damaging effects can occur for the eyes of an observer. The corresponding light distribution and indirect emission of light via the luminaire reflector.
Insgesamt ergibt sich somit eine relativ homogene Lichtquelle trotz der Mehrzahl von verwendeten Einzel-LEDs. Gleichzeitig werden entsprechende Schattenbildungen verhindert und eine Blendung durch die LEDs vermieden. Overall, this results in a relatively homogeneous light source despite the majority of individual LEDs used. At the same time, appropriate shadowing is prevented and glare caused by the LEDs is avoided.
Ein Raumwinkelbereich, in dem eine LED leuchtet, beträgt in der Regel 90° bis 140° je nach LED-Typ. A solid angle range in which an LED lights, is usually 90 ° to 140 ° depending on the LED type.
Gleichzeitig können erfindungsgemäß die LEDs aufgrund der Vermeidung einer Blendung zum Teil näher relativ zueinander oder auch in kleineren Gruppen angeordnet werden. Zur entsprechenden Verteilung der Lichtemission einer jeden LED und zum Überlapp der verschiedenen Raumwinkelbereiche ist es ausreichend, wenn der Leuchtenreflektor in Leuchtenlängsrichtung geradlinig verläuft. D. h., bis ggf. auf Endabschnitte des Leuchtenreflektors erstreckt sich dieser in Leuchtenlängsrichtung geradlinig ohne Krümmungen. Um die Lichtverteilung in Querrichtung zur Leuchte in bestimmter Weise beeinflussen zu können, kann der Leuchtenreflektor in Leuchtenquerrichtung aus einer Anzahl von im Wesentlichen planen oder gekrümmten Reflektorflächen zusammengesetzt sein. Je nach Anordnung dieser Reflektorflächen ergibt sich eine entsprechende Lichtverteilung in Leuchtenquerrichtung, die ebenfalls einer Leuchtstoffröhre oder dergleichen hinsichtlich deren Emission nachempfunden sein kann. At the same time, according to the invention, due to the avoidance of glare, the LEDs can be arranged in part closer relative to one another or else in smaller groups. For the corresponding distribution of the light emission of each LED and the overlap of the different solid angle ranges, it is sufficient if the luminaire reflector in the longitudinal direction of the lamp is rectilinear. D. h., Until possibly on end portions of the luminaire reflector, this extends in the lamp longitudinal direction straight without curvatures. In order to be able to influence the light distribution in the transverse direction to the luminaire in a certain way, the luminaire reflector in the transverse direction of the luminaire can be composed of a number of substantially planar or curved reflector surfaces. Depending on the arrangement of these reflector surfaces results in a corresponding light distribution in the transverse direction of the lamp, which can also be modeled on a fluorescent tube or the like in terms of their emission.
Bei einem einfachen Ausführungsbeispiel sind alle Reflektorflächen miteinander verbunden, so dass im Wesentlichen ein einteiliger Leuchtenreflektor verwendet wird. In a simple embodiment, all the reflector surfaces are connected to each other, so that essentially a one-piece luminaire reflector is used.
Die verschiedenen Reflektorflächen können relativ zueinander zur Festlegung eines allen LEDs gemeinsamen Beleuchtungswinkel geneigt sein. Beispielsweise kann ein entspre- chender Beleuchtungswinkel zumindest von entlang einer Reihe angeordneter LEDs 30°, 40° oder auch 45° betragen. Andere Beleuchtungswinkel sind ebenfalls möglich. The various reflector surfaces may be inclined relative to each other to define an illumination angle common to all LEDs. For example, a corresponding illumination angle of at least LEDs arranged along a row can be 30 °, 40 ° or even 45 °. Other illumination angles are also possible.
Bei der erfindungsgemäßen Leuchte ist es ebenfalls denkbar, dass zwei oder auch mehr Gruppen von LEDs nebeneinander in Leuchtenquerrichtung angeordnet sind. Dies entspricht beispielsweise der Anordnung von zwei oder mehr Leuchtstoffröhren. Auch hin- sichtlich dieser Gruppen von LEDs besteht die Möglichkeit für jede Gruppe einen bestimmten Beleuchtungswinkel durch Anordnung der Reflektorflächen festzulegen. Die Beleuchtungswinkel einer jeden Gruppe von LEDs können dabei unterschiedlich sein. In the luminaire according to the invention, it is also conceivable that two or more groups of LEDs are arranged side by side in the transverse direction of the lamp. This corresponds, for example, to the arrangement of two or more fluorescent tubes. With regard to these groups of LEDs, it is also possible to define a specific illumination angle for each group by arranging the reflector surfaces. The illumination angles of each group of LEDs may be different.
Weiterhin ist es denkbar, dass die Beleuchtungswinkel der LED-Gruppen einander überlappen und insgesamt einen bestimmten Beleuchtungswinkel festlegen. Zur Anordnung der LED-Gruppen kann es von Vorteil sein, wenn jeder LED-Gruppe ein LED-Träger zugeordnet ist. Dadurch sind die LED-Gruppen separat handhabbar und auch austauschbar. Furthermore, it is conceivable that the illumination angles of the LED groups overlap each other and determine a total of a certain illumination angle. For the arrangement of the LED groups, it may be advantageous if each LED group is associated with an LED carrier. This makes the LED groups separately manageable and interchangeable.
Je nach Anordnung der LED-Gruppen ist es ebenfalls denkbar, dass für beide LED- Gruppen nur ein LED-Träger vorgesehen ist. Der entsprechende LED-Träger dient in der Regel auch als Kühleinrichtung für die LEDs. In diesem Zusammenhang kann es von Vorteil sein, wenn der Leuchtenträger Kühllamellen aufweist. Der LED-Träger kann auch ohne Kühlflächen ausgebildet sein und beispielsweise direkt am Leuchtengehäuse angebracht oder Teil von diesem sein. Insbesondere bei Anordnung von zwei LED-Gruppen kann der Aufbau des Leuchtenreflektors dadurch vereinfacht werden, wenn die Reflektionsflächen für jede LED-Gruppe spiegelbildlich zueinander angeordnet sind. Auch denkbar ist eine asymmetrische Anordnung, um Licht beispielsweise durch entsprechende Reflektion in bestimmten Breichen zu konzentrieren. Dies kann dadurch erreicht werden, dass alle Reflektionsflächen für alle LED-Gruppen von nur einem Leuchtenreflektor gebildet sind. Depending on the arrangement of the LED groups, it is also conceivable that only one LED carrier is provided for both LED groups. The corresponding LED carrier is usually also used as a cooling device for the LEDs. In this context, it may be advantageous if the light carrier has cooling fins. The LED carrier can also be designed without cooling surfaces and, for example, mounted directly on the luminaire housing or be part of this. In particular, in the arrangement of two LED groups, the structure of the luminaire reflector can be simplified if the reflection surfaces for each LED group are arranged in mirror image to each other. Also conceivable is an asymmetric arrangement to concentrate light, for example, by appropriate reflection in certain areas. This can be achieved in that all reflection surfaces for all LED groups are formed by only one luminaire reflector.
Zum einfachen Handhaben und Anbringen der Leuchte kann diese ein Leuchtengehäuse mit zumindest in Lichtemissionsrichtung transparentem oder transluzentem Gehäuseteil aufweisen. Es ist ebenfalls denkbar, dass das Leuchtengehäuse in Lichtemissionsrichtung offen ist. For easy handling and attachment of the lamp, it may have a luminaire housing with at least in the light emission direction transparent or translucent housing part. It is also conceivable that the luminaire housing is open in the light emission direction.
Innerhalb des Leuchtengehäuses kann beispielsweise der Leuchtenreflektor lösbar gehalten sein. Das entsprechende Halten kann durch Verschrauben oder dergleichen erfolgen. Ebenfalls ist denkbar, dass der Leuchten reflektor an seitlichen Endabschnitten im Leuchtengehäuse verrastet ist, so dass keine weiteren Maßnahmen zur Befestigung ergriffen werden müssen. Der Leuchten reflektor kann auch mit dem Leuchtengehäuse eine festverbaute Einheit bilden. Within the luminaire housing, for example, the luminaire reflector can be releasably held. The corresponding holding can be done by screwing or the like. It is also conceivable that the lights reflector is latched to lateral end portions in the lamp housing, so that no further measures for attachment must be taken. The luminaire reflector can also form a fixed unit with the luminaire housing.
Es ist ebenfalls möglich, dass die LEDs einer jeden LED-Gruppe zwei im wesentlichen getrennte Beleuchtungsbereiche bilden. Ein gewisser Überlapp kann zwischen diesen Beleuchtungsbereichen stattfinden, wobei allerdings im Wesentlichen jede LED-Gruppe in parallele Richtungen und mit von einander getrennten Raumwinkelbereichen leuchtet. Erst in einem gewissen Abstand zur Leuchte kann dann ein Überlapp der Raumwinkel - bzw. Beleuchtungsbereiche stattfinden, der mit steigendem Abstand zur Leuchte zunimmt, d.h. die Beleuchtungsbereiche vermischen sich immer mehr. It is also possible that the LEDs of each LED group form two substantially separate illumination areas. Some overlap may occur between these areas of illumination, but essentially each group of LEDs will illuminate in parallel directions and spaced solid angle ranges. Only at a certain distance from the luminaire can an overlap of the solid angle or illumination areas take place, which increases with increasing distance to the luminaire, i. The lighting areas are becoming more and more mixed.
Um die Leuchte auch in explosionsgefährdeten Bereichen einsetzen zu können, können die LEDs in entsprechender Zündschutzart wie bspw. Ex-d oder Ex-m ausgebildet sein. Dies kann dadurch erfolgen, dass die LEDs mit zugeordneter Kühlfläche oder Kühlkörper vergossen sind. Die LEDs können durch einen LED-Streifen mit entsprechender Anzahl von LEDs gebildet sein. Dieser Streifen ist auf die Kühlfläche aufgelegt und wird mit einer Abdeckung für alle LEDs des entsprechenden Streifens abgedeckt. Diese Abdeckung kann dann entlang ihres gesamten Umfangs durch eine entsprechende Vergussmasse relativ zur Halterung der LEDs vergossen sein, dass die entsprechende Zündschutzart realisiert ist. In order to use the light in hazardous areas, the LEDs can be designed in the appropriate type of protection such as Ex-d or Ex-m. This can be done by the LEDs are shed with associated cooling surface or heat sink. The LEDs can be formed by an LED strip with a corresponding number of LEDs. This strip is placed on the cooling surface and covered with a cover for all LEDs of the corresponding strip. This cover can then be cast along its entire circumference by a corresponding potting compound relative to the holder of the LEDs, that the appropriate type of protection is realized.
Die Anordnung der entsprechenden LED-Träger kann vorzugsweise so erfolgen, dass diese außerhalb des reflektierten Raumwinkelbereichs einer jeden LED angeordnet sind. Im Folgenden sind vorteilhafte Ausführungsbeispiele der Erfindung anhand der in den beigefügten Zeichnungen abgebildeten Figuren näher erläutert. The arrangement of the corresponding LED carrier may preferably be such that they are arranged outside the reflected solid angle range of each LED. In the following advantageous embodiments of the invention are explained in more detail with reference to the figures illustrated in the accompanying drawings.
Es zeigen: Show it:
Figur 1 einen Querschnitt durch ein erstes Ausführungsbeispiel einer erfindungsgemäßen Leuchte; Figur 2 einen Querschnitt durch ein zweites Ausführungsbeispiel einer erfindungsgemäßen Leuchte, und Figure 1 shows a cross section through a first embodiment of a lamp according to the invention; Figure 2 shows a cross section through a second embodiment of a lamp according to the invention, and
Figur 3 einen teilweisen Längsschnitt durch die Leuchten der Figur 2 im Bereich einer LED-Gruppe. Figure 3 is a partial longitudinal section through the lights of Figure 2 in the region of an LED group.
Figur 1 zeigt einen Querschnitt, siehe Leuchtenquerrichtung 1 1 , durch ein erstes Ausf üh- rungsbeispiel einer erfindungsgemäßen Leuchte 1. Diese weist zwei Gruppen von LEDs 2 auf, siehe LED-Gruppe 16 und 17. Beide LED-Gruppen 16 und 17 sind auf einem LED- Träger 5 angeordnet. Dieser bildet gleichzeitig einen Kühlkörper mit entsprechenden Kühllamellen 19. Die LED-Gruppen 16, 17 sind in einem bestimmten LED-Abstand 4 auf dem zugehörigen Träger angeordnet, siehe auch Figur 3. Alle LEDs 2 sind auf einem LED-Streifen angeordnet, der auf einer entsprechenden Kühlfläche des LED-Trägers 5 aufliegt. Die LEDs 2 sind von einem Abdeckungsgehäuse 27 abgedeckt, das mit dem Träger 5 beispielsweise vergossen ist, damit die LEDs in einer entsprechenden Zündschutzart wie Ex-d oder Ex-m ausgebildet sind. Bei dem dargestellten Ausführungsbeispiel sind die LEDs 2 der entsprechenden Gruppen 16 und 17 nach außen hin geneigt angeordnet. Jede LED gibt Licht in einem bestimmten Raumwinkelbereich 6 ab, der in Fig. 1 durch die verschiedenen von den LEDs 2 ausgehenden Strahlen gekennzeichnet ist. Der gesamte Raumwinkelbereich 6 trifft auf unter- schiedliche plane Reflektorflächen 12, 13, 14 auf, die insgesamt einen Leuchtenreflektor 8 bilden. Dadurch wird Licht im Raumwinkelbereich 6 indirekt von der Leuchte abgegeben, siehe auch die entsprechenden Raumwinkelbereiche unterhalb der Leuchte 1 , die entsprechende Beleuchtungswinkel 15 aufweisen. Die zugehörige Lichtemissionsrichtung 26 ist von der Leuchte 1 weg zu einem Betrachter gerichtet. Jeder der Raumwinkelbereiche 6 weist eine Abstrahlmittelrichtung 7 auf, um die herum sich der Raumwinkelbereich 6 erstreckt, siehe auch die folgenden Figuren. FIG. 1 shows a cross section, see luminaire transverse direction 1 1, through a first exemplary embodiment of a luminaire 1 according to the invention. This has two groups of LEDs 2, see LED groups 16 and 17. Both LED groups 16 and 17 are on one LED carrier 5 arranged. This forms at the same time a heat sink with corresponding cooling fins 19. The LED groups 16, 17 are arranged at a specific LED distance 4 on the associated carrier, see also Figure 3. All LEDs 2 are arranged on an LED strip, which on a corresponding cooling surface of the LED support 5 rests. The LEDs 2 are covered by a cover housing 27, which is encapsulated with the carrier 5, for example, so that the LEDs are formed in a corresponding type of protection such as Ex-d or Ex-m. In the illustrated embodiment, the LEDs 2 of the respective groups 16 and 17 are inclined outwardly. Each LED emits light in a certain solid angle range 6, which is characterized in Fig. 1 by the different emanating from the LEDs 2 rays. The entire solid angle region 6 impinges on different flat reflector surfaces 12, 13, 14, which together form a luminaire reflector 8. As a result, light in the solid angle region 6 is emitted indirectly from the luminaire, see also the corresponding solid angle ranges below the luminaire 1, which have corresponding illumination angles 15. The associated light emission direction 26 is directed away from the lamp 1 to a viewer. Each of the solid angle regions 6 has an emission means 7 around which the solid angle region 6 extends, see also the following figures.
Der Leuchten reflektor 8 ist einteilig aus einer Reihe entsprechender Reflektorflächen 12, 13 und 14 gebildet. Dabei sind die Reflektorflächen symmetrisch zu einer Mittelachse der Leuchte 1 angeordnet, so dass gleiche Teile des Leuchtenreflektors jeder LED-Gruppe 16 bzw. 17 zugeordnet sind. The luminaire reflector 8 is integrally formed from a series of corresponding reflector surfaces 12, 13 and 14. The reflector surfaces are arranged symmetrically to a central axis of the lamp 1, so that the same parts of the luminaire reflector each LED group 16 and 17 are assigned.
Auf Grundlage der Anordnung der entsprechenden Reflektorflächen ergeben sich im Wesentlichen zwei Raumwinkelbereiche 6, die jeweils einer Gruppe 16, 17 zugeordnet sind, siehe auch die Beleuchtungsbereiche 22 und 23 und die zugehörigen Beleuchtungswinkel 15, die jeweils um eine entsprechende Abstrahlmittelrichtung 7 angeordnet sind. Die beiden Raumwinkelbereiche 6 überlappen sich zumindest in angrenzenden Bereichen der Beleuchtungsbereiche 22 und 23. On the basis of the arrangement of the corresponding reflector surfaces, there are essentially two solid angle regions 6, which are each assigned to a group 16, 17, see also the illumination regions 22 and 23 and the associated illumination angles 15, which are each arranged around a corresponding emission center direction 7. The two solid angle regions 6 overlap at least in adjacent regions of the illumination regions 22 and 23.
Der Leuchten reflektor 8 ist innerhalb eines entsprechenden Leuchtengehäuses 20 angeordnet. An seinen Endabschnitten 24 und 25 ist der Leuchtenreflektor 8 innerhalb des Leuchtengehäuses 20 verrastet. Figur 2 zeigt einen Schnitt analog zur Figur 1 durch ein zweites Ausführungsbeispiel einer erfindungemäßen Leuchte 1. Bei dieser Leuchte sind die LEDs 2 getrennt voneinander als LED-Gruppen 16 und 17 an seitlichen Enden innerhalb des entsprechenden Leuchtengehäuses 20 angeordnet. Jede LED-Gruppe 16 bzw. 17 weist einen Träger 5 bzw. 18 auf, der analog zum Träger nach Figur 1 aufgebaut sein kann. Jeder dieser Träger umfasst zumindest einen Kühlkörper und ein Abdeckungsgehäuse 27 für die in einer Reihe hintereinander in Leuchtenlängsrichtung angeordneten LEDs 2. Die Form des Leuchtengehäuses 20 nach Fig. 2 entspricht derjenigen nach Fig. 1. Allerdings weist der Leuchtenreflektor 8 eine etwas andere Form auf. Er setzt sich zwar aus entsprechenden Reflektorflächen 12, 13, 14 und dergleichen zusammen, wobei diese allerdings von den LEDs 2 abgegebenes Licht so reflektieren, dass die entsprechenden Raumwinkelbereiche 6 einander in den Beleuchtungsbereichen 22 und 23 überlappen. Dabei stimmt der Beleuchtungswinkel 15 im Wesentlichen mit dem Beleuchtungswinkel 15 der Fig. 1 überein und beträgt beispielsweise in etwa 30°. The lights reflector 8 is disposed within a corresponding lamp housing 20. At its end portions 24 and 25 of the light reflector 8 is locked within the lamp housing 20. FIG. 2 shows a section analogous to FIG. 1 through a second exemplary embodiment of a luminaire 1 according to the invention. In this luminaire, the LEDs 2 are arranged separately from one another as LED groups 16 and 17 at lateral ends within the corresponding luminaire housing 20. Each LED group 16 or 17 has a carrier 5 and 18, which may be constructed analogously to the carrier of Figure 1. Each of these carriers comprises at least one heat sink and a cover housing 27 for the LEDs 2 arranged in a row one behind the other in the longitudinal direction of the lamp. The shape of the light housing 20 of FIG. 2 corresponds to that of FIG. 1. However, the light reflector 8 has a slightly different shape. Although it is made up of corresponding reflector surfaces 12, 13, 14 and the like, these reflect light emitted by the LEDs 2 in such a way that the corresponding solid angle regions 6 overlap one another in the illumination regions 22 and 23. In this case, the illumination angle 15 substantially coincides with the illumination angle 15 of FIG. 1 and is for example approximately 30 °.
Auch bei dem Ausführungsbeispiel nach Fig. 2 sind Endabschnitte 24 und 25 des Leuchtenreflektors 8 innerhalb des Leuchtengehäuses 20 lösbar durch verrasten befestigt. Da- bei werden die gleichen Rastelemente im Inneren des Leuchtengehäuses 20 verwendet, siehe insbesondere nach innen abstehende Rasthaken 29. Auch bei dem Ausführungsbeispiel nach Fig. 2 sind die entsprechenden LEDs 2 in Zündschutzart Ex-d oder Ex-m ausgebildet. Also in the embodiment of FIG. 2 end portions 24 and 25 of the luminaire reflector 8 are releasably secured within the lamp housing 20 by latching. In this case, the same locking elements are used in the interior of the lamp housing 20, see in particular inwardly projecting latching hooks 29. Also in the embodiment of FIG. 2, the corresponding LEDs 2 in ignition protection Ex-d or Ex-m are formed.
Im Übrigen sind in allen Figuren gleiche Teile jeweils durch gleiche Bezugszeichen ge- kennzeichnet und werden teilweise nur im Zusammenhang mit einer Figur näher beschrieben. Incidentally, the same parts are denoted by the same reference numerals in all figures and are described in part only in connection with a figure.
Figur 3 zeigt eine Teildarstellung eines Längsschnitts durch eine Leuchte 1 nach Fig. 2, wobei der Längsschnitt genau entlang der linear hintereinander angeordneten LEDs 2 eines LED-Trägers 5 bzw. 18 verläuft. Die Leuchte 1 ist in Fig. 3 zur Hälfte dargestellt, siehe entsprechende Mittelachse 28, wobei die hier besprochenen Teile der Leuchte in beiden Leuchtenhälften in gleicher Weise angeordnet sind. FIG. 3 shows a partial representation of a longitudinal section through a luminaire 1 according to FIG. 2, wherein the longitudinal section runs exactly along the LEDs 2 of an LED carrier 5 and 18 arranged linearly one behind the other. The lamp 1 is shown in Fig. 3 in half, see corresponding central axis 28, wherein the parts of the lamp discussed here are arranged in the same way in both halves of the lamp.
Die verschiedenen LEDs 2 sind in Leuchtenlängsrichtung 3 mit entsprechendem LED- Abstand 4 auf zugehörigem LED-Träger 5 angeordnet. Insbesondere ist in Fig. 3 dargestellt, wie die verschiedenen Raumwinkelbereiche 6 der hintereinander angeordneten LEDs 2 miteinander nach Reflektion am Leuchtenreflektor 8 überlappen, siehe die verschiedene Reflektion unter jeweils Winkeln von 20° zur Abstrahlmittelrichtung 7 oder auch die weiteren Reflektionen unter jeweils 60° oder 40° relativ zu dieser Abstrahlmittelrichtung 7. Der entsprechende Winkel von 120° des Raumwinkelbereichs 6 entspricht dem maximalen Abstrahlwinkel der hier verwendeten LEDs 2. Der LED-Abstand 4 und die ent- sprechende Anzahl der LEDs 2 in Leuchtenlängsrichtung 3 sind so gewählt, dass die am weitest beabstandeten LEDs 2 in ihren reflektierten Raumwinkelbereichen 6 in einem ent- sprechenden Beleuchtungsflächenabstand 9 zumindest teilweise überlappen, wobei dieser Beleuchtungsflächenabstand 9 zumindest dem 0,2- bis 2,5-fachen des entsprechenden Abstandes der voneinander weitest beabstandeten LEDs 2 entspricht. Der Beleuchtungsflächenabstand 9 wird von einer Unterseite 10 der Leuchte 1 gemessen, die im We- sentlichen der Unterseite eines transparenten oder transluzenten Gehäuseteils 21 entspricht. Der Abstand der weitest beabstandeten LEDs 2 nach Fig. 3 entspricht dem Abstand von der in Fig. 3 ganz links angeordneten LED 2 zu der in der nicht dargestellten Hälfte ganz rechts angeordneten LED 2. The various LEDs 2 are arranged in the lamp longitudinal direction 3 with a corresponding LED spacing 4 on the associated LED carrier 5. In particular, it is shown in FIG. 3 how the different solid angle regions 6 of the LEDs 2 arranged behind one another overlap with one another after reflection at the luminaire reflector 8, see the different reflection at respectively angles of 20 ° to the emission direction 7 or also the further reflections at respectively 60 ° or 40 ° Relative to this Abstrahlmittelrichtung 7. The corresponding angle of 120 ° of the solid angle range 6 corresponds to the maximum radiation angle of the LEDs used here 2. The LED distance 4 and the corresponding number of LEDs 2 in the longitudinal direction 3 are selected so that the am LEDs 2 in their reflected solid angle ranges 6 in a at least partially overlap speaking illumination surface distance 9, said illumination surface spacing 9 corresponds to at least 0.2 to 2.5 times the corresponding distance of the LEDs 2 spaced furthest apart. The illumination surface distance 9 is measured by an underside 10 of the luminaire 1, which essentially corresponds to the underside of a transparent or translucent housing part 21. The distance between the furthest spaced LEDs 2 of Fig. 3 corresponds to the distance from the leftmost in Fig. 3 arranged LED 2 to the not shown in the half rightmost LED 2.
In Fig. 3 sind einige Raumwinkelbereiche 6 benachbarter LEDs 2 für einen Öffnungswin- kel von 20° der entsprechenden Bereiche um die Abstrahlmittelrichtung 7 dargestellt. Auch diese überlappen bereits, was bei größeren Winkeln der entsprechenden Raumwinkelbereiche im Hinblick auf weiter beabstandete LEDs 2 in analoger Weise gilt. FIG. 3 shows some solid angle ranges 6 of adjacent LEDs 2 for an opening angle of 20 ° of the corresponding regions around the emission direction 7. These too already overlap, which applies analogously to larger angles of the corresponding solid angle ranges with regard to more widely spaced LEDs 2.
Aufgrund des entsprechenden Überlapps der verschiedenen Raumwinkelbereiche 6 und durch die Reflektion des von den LEDs 2 abgegebenen Lichts am entsprechenden Leuch- tenreflektor 8 ergibt sich eine homogene Verteilung der Lichtemission, so dass punktförmige Lichtquellen nicht mehr im entsprechenden Beleuchtungsflächenabstand 9 erkennbar sind. Ein Blendeffekt durch die verschiedenen LEDs 2 tritt ebenfalls nicht mehr durch diese homogene Lichtverteilung auf. Stattdessen entspricht das Beleuchtungsbild der LEDs im Wesentlichen dem einer Leuchtstoffröhre oder auch zweier nebeneinander an- geordneter Leuchtstoffröhren, siehe beispielsweise Fig. 1. Due to the corresponding overlap of the different solid angle regions 6 and the reflection of the light emitted from the LEDs 2 light at the corresponding luminaire ten reflector 8 results in a homogeneous distribution of light emission, so that punctiform light sources are no longer recognizable in the corresponding illumination surface distance 9. A glare effect through the different LEDs 2 also no longer occurs due to this homogeneous light distribution. Instead, the illumination image of the LEDs essentially corresponds to that of a fluorescent tube or of two fluorescent tubes arranged next to one another, see, for example, FIG. 1.
Durch die Verwendung eines entsprechenden Trägers mit entsprechendem Kühleffekt für die LEDs ist eine weitere Kühlung nicht erforderlich und die LEDs können in relativ geringem Abstand zueinander angeordnet sein. Dadurch ergibt sich bei Verwendung eines entsprechenden Abdeckungsgehäuses 27 für die LEDs 2 ein kleines freies Volumen, was für den entsprechenden Explosionsschutz bzw. Ausbildung der LEDs mit entsprechender Zündschutzart von Vorteil ist. By using a corresponding carrier with a corresponding cooling effect for the LEDs further cooling is not required and the LEDs can be arranged at a relatively small distance from each other. This results in the use of a corresponding cover housing 27 for the LEDs 2, a small free volume, which is for the corresponding explosion protection or training of the LEDs with appropriate ignition protection advantage.

Claims

Ansprüche claims
1. Leuchte (1) mit einer Mehrzahl von LEDs (2), welche in Leuchtenlängsrichtung (3) hintereinander jeweils in einem LED-Abstand (4) mittels eines LED-Trägers (5) angeordnet sind, wobei jede LED (2) Licht in einem bestimmten Raumwinkelbereich (6) um eine Abstrahlmittelrichtung (7) abgibt, welcher Raumwinkelbereich (6) in Richtung zu einem Leuchten reflektor (8) zur indirekten Lichtemission der Leuchte (1) gerichtet ist, wobei LED-Anzahl und/oder LED-Abstand (4) so gewählt sind, dass Raumwinkelbereiche (6) aller LEDs nach Reflektion am Leuchtenreflektor (8) zumindest teilweise in einem Beleuchtungsflächenabstand (9) von einer Unterseite (10) der Leuchte (1) von zumindest dem 0,2 bis 2,5 fachen Abstand der voneinander am weitest beabstandeten LEDs überlappen. 1. lamp (1) having a plurality of LEDs (2), which in the lamp longitudinal direction (3) one behind the other in an LED spacing (4) by means of an LED support (5) are arranged, each LED (2) light in a certain solid angle range (6) around a Abstrahlmittelrichtung (7) outputs, which solid angle range (6) in the direction of a luminous reflector (8) for indirect light emission of the lamp (1) is directed, wherein LED number and / or LED distance ( 4) are selected so that solid angle ranges (6) of all LEDs after reflection on the luminaire reflector (8) at least partially in a illumination surface spacing (9) from a bottom (10) of the lamp (1) of at least 0.2 to 2.5 times Overlap the distance of the furthest spaced apart LEDs.
2. Leuchten nach Anspruch 1 , dadurch gekennzeichnet, dass der Leuchtenreflektor (8) in Leuchtenlängsrichtung (3) gradlinig verläuft. 2. Lights according to claim 1, characterized in that the lamp reflector (8) in the lamp longitudinal direction (3) extends in a straight line.
3. Leuchte nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Leuchtenreflektor (8) in Leuchtenquerrichtung (11) aus einer Anzahl von im Wesentlichen planen oder gekrümmten Reflektorflächen (12, 13, 14) zusammengesetzt ist. 3. Lamp according to claim 1 or 2, characterized in that the luminaire reflector (8) in the transverse direction of the lamp (11) consists of a number of substantially planar or curved reflector surfaces (12, 13, 14) is composed.
4. Leuchte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Reflektorflächen (12, 13, 14) miteinander verbunden sind. 4. Lamp according to one of the preceding claims, characterized in that the reflector surfaces (12, 13, 14) are interconnected.
5. Leuchte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Reflektorflächen (12, 13, 14) relativ zu einander zur Festlegung eines allen LEDs gemeinsamen Beleuchtungswinkels (15) geneigt sind. 5. Lamp according to one of the preceding claims, characterized in that the reflector surfaces (12, 13, 14) relative to each other for fixing an all LEDs common illumination angle (15) are inclined.
6. Leuchte einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass zwei Gruppen (16, 17) von LEDs nebeneinander in Leuchtenlängsrichtung (3) angeordnet sind. 6. Lamp one of the preceding claims, characterized in that two groups (16, 17) of LEDs side by side in the lamp longitudinal direction (3) are arranged.
7. Leuchte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass jede LED-Gruppe (16, 17) einen LED-Träger (5, 18) aufweist. 7. Lamp according to one of the preceding claims, characterized in that each LED group (16, 17) has an LED carrier (5, 18).
8. Leuchte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass für beide LED-Gruppen (16, 17) ein LED-Träger (5) vorgesehen ist. 8. Lamp according to one of the preceding claims, characterized in that for both LED groups (16, 17) an LED support (5) is provided.
9. Leuchte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Beleuchtungswinkel (15) beider LED-Gruppen (16, 17) einander überlappen. 9. Lamp according to one of the preceding claims, characterized in that the illumination angle (15) of both LED groups (16, 17) overlap each other.
10. Leuchte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Reflektionsflächen (12, 13, 14) für jede LED-Gruppe (16, 17) spiegelbildlich oder asymmetrisch zueinander angeordnet sind. 10. Lamp according to one of the preceding claims, characterized in that the reflection surfaces (12, 13, 14) for each LED group (16, 17) are arranged in mirror image or asymmetrical to each other.
11. Leuchte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass alle Reflektionsflächen (12, 13, 14) durch einen Leuchtenreflektor (8) gebildet sind. 11. Lamp according to one of the preceding claims, characterized in that all reflection surfaces (12, 13, 14) are formed by a light reflector (8).
12. Leuchte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der LED-Träger (5, 18) Kühllamellen (19) aufweist. 12. Luminaire according to one of the preceding claims, characterized in that the LED carrier (5, 18) has cooling fins (19).
13. Leuchte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Leuchte (1) ein Leuchtengehäuse (20) mit zumindest in Lichtemissionsrichtung (26) transparentem oder transluzentem Gehäuse aufweist. 13. Luminaire according to one of the preceding claims, characterized in that the lamp (1) has a lamp housing (20) with at least in the light emission direction (26) transparent or translucent housing.
14. Leuchte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Leuchtenreflektor (8) im Leuchtengehäuse (20) lösbar gehalten ist bzw. mit diesem eine festverbaute Einheit bildet. 14. Luminaire according to one of the preceding claims, characterized in that the luminaire reflector (8) in the lamp housing (20) is releasably held or forms a fixed unit with this.
15. Leuchte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die LEDs einer jeden Gruppe (16, 17) zwei im Wesentlichen voneinander getrennte Beleuchtungsbereiche (22, 23) bilden, die sich insbesondere mit steigendem Abstand zur Leuchte immer mehr vermischt. 15. Luminaire according to one of the preceding claims, characterized in that the LEDs of each group (16, 17) form two substantially separate illumination areas (22, 23), which mixes more and more with increasing distance to the light.
16. Leuchte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Leuchtenreflektor (8) an seitlichen Endabschnitten (24, 25) im Leuchtengehäuse (20) verrastet ist. 16. Light according to one of the preceding claims, characterized in that the luminaire reflector (8) at lateral end portions (24, 25) in the lamp housing (20) is latched.
17. Leuchte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die LEDs in Zündschutzart Ex-d oder Ex-m ausgebildet sind. 17. Light according to one of the preceding claims, characterized in that the LEDs are designed in ignition protection Ex-d or Ex-m.
18. Leuchte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der LED-Träger (5, 18) außerhalb des reflektierten Raumwinkelbereichs (6) einer jeden LED angeordnet ist. 18. Light according to one of the preceding claims, characterized in that the LED support (5, 18) outside the reflected solid angle range (6) of each LED is arranged.
19. Leuchte nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die LEDs mittels eines gemeinsamen LED-Abdeckungsgehäuses und einer19. Light according to one of the preceding claims, characterized in that the LEDs by means of a common LED cover housing and a
Vergussmasse relativ zum LED-Träger gekapselt sind. Potting compound are encapsulated relative to the LED carrier.
EP12716236.0A 2011-04-15 2012-04-03 Luminaire Active EP2697559B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011017161A DE102011017161A1 (en) 2011-04-15 2011-04-15 lamp
PCT/EP2012/001482 WO2012139723A1 (en) 2011-04-15 2012-04-03 Luminaire

Publications (2)

Publication Number Publication Date
EP2697559A1 true EP2697559A1 (en) 2014-02-19
EP2697559B1 EP2697559B1 (en) 2016-08-31

Family

ID=45999766

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Application Number Title Priority Date Filing Date
EP12716236.0A Active EP2697559B1 (en) 2011-04-15 2012-04-03 Luminaire

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US (1) US9200759B2 (en)
EP (1) EP2697559B1 (en)
JP (2) JP2014511017A (en)
KR (3) KR20140000344A (en)
CN (1) CN103582779B (en)
AU (1) AU2012242300B2 (en)
BR (1) BR112013026421A2 (en)
CA (1) CA2833060C (en)
DE (1) DE102011017161A1 (en)
RU (1) RU2571734C2 (en)
SA (1) SA112330445B1 (en)
WO (1) WO2012139723A1 (en)

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Also Published As

Publication number Publication date
US20140226328A1 (en) 2014-08-14
AU2012242300A1 (en) 2013-12-05
JP6073989B2 (en) 2017-02-01
CN103582779B (en) 2016-08-17
CN103582779A (en) 2014-02-12
KR20140000344A (en) 2014-01-02
BR112013026421A2 (en) 2016-12-20
US9200759B2 (en) 2015-12-01
KR20160091459A (en) 2016-08-02
JP2014511017A (en) 2014-05-01
AU2012242300B2 (en) 2014-09-25
JP2016006774A (en) 2016-01-14
RU2013147731A (en) 2015-05-20
RU2571734C2 (en) 2015-12-20
CA2833060C (en) 2015-12-29
CA2833060A1 (en) 2012-10-18
WO2012139723A1 (en) 2012-10-18
KR20150085117A (en) 2015-07-22
EP2697559B1 (en) 2016-08-31
DE102011017161A1 (en) 2012-10-18
SA112330445B1 (en) 2015-10-14

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