EP1179158B1 - Light - Google Patents

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Publication number
EP1179158B1
EP1179158B1 EP00929391A EP00929391A EP1179158B1 EP 1179158 B1 EP1179158 B1 EP 1179158B1 EP 00929391 A EP00929391 A EP 00929391A EP 00929391 A EP00929391 A EP 00929391A EP 1179158 B1 EP1179158 B1 EP 1179158B1
Authority
EP
European Patent Office
Prior art keywords
lamp
reflector
optical element
microprisms
light
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.)
Expired - Lifetime
Application number
EP00929391A
Other languages
German (de)
French (fr)
Other versions
EP1179158A1 (en
Inventor
Günther SEJKORA
Jürg ZUMTOBEL
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 Staff GmbH
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
Priority claimed from DE19923225A external-priority patent/DE19923225B4/en
Application filed by Zumtobel Staff GmbH filed Critical Zumtobel Staff GmbH
Priority to EP03007163A priority Critical patent/EP1338845B1/en
Publication of EP1179158A1 publication Critical patent/EP1179158A1/en
Application granted granted Critical
Publication of EP1179158B1 publication Critical patent/EP1179158B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • 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
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • 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
    • F21V5/00—Refractors for light sources
    • F21V5/002—Refractors for light sources using microoptical elements for redirecting or diffusing light
    • 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
    • F21V5/00—Refractors for light sources
    • F21V5/02—Refractors for light sources of prismatic shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/005—Reflectors for light sources with an elongated shape to cooperate with linear 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
    • 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

Definitions

  • the present invention relates to a lamp with an optical element Microprism structure for limiting the exit angle of the light rays from the Luminaire according to the preamble of claim 1.
  • optical elements of the type mentioned above should be achieved that the Angle of exit of light rays from the luminaire is limited, i.e. smaller than one predetermined limit exit angle is to cause glare for the viewer reduce.
  • such an optical element also causes one mechanical protection of the lamp and especially the lamp inside the lamp.
  • Such an optical element is, for example, from the Austrian patent AT-B-403.403 known.
  • the known optical element has its side facing the lamp of the lamp arranged in rows and rows pyramid-like profiles 2, so-called microprisms, on the truncated pyramids are formed from a plate-shaped core 3 and a parallel to the base surface (light exit surface) of the core 3 lying upper boundary surface (Light entry surface).
  • the entire optical element 1 consists entirely of a crystal clear or transparent material.
  • the known lamp 4 has a Lamp 5, such as a fluorescent tube or the like, on the lamp 5 surrounding reflector housing 6 and an optical element 1.
  • the optical element 1 also consists of a plate-shaped core 3 made of low-cost material is covered on one side with microprisms 2, which form furrows 7 - starting from their roots - rejuvenate, taking the entirety of the microprism cover surfaces the light entry surface 8 forms.
  • lenses 9 are provided to limit the exit angle to ensure the light rays from the optical element 1 are on the other Side of the core 3, which forms the light exit surface.
  • a lamp with a lamp, a reflector surrounding the lamp and a in the radiation direction in front of the lamp arranged optical element of the above The type described is known, for example, from EP 0 911 577 A2. Also the JP-A-10 106319 describes a similar lamp, in which two are in the direction of radiation optical elements are arranged one behind the other, the Microprismatic structures of these optical elements aligned parallel to each other are.
  • the corresponding designed optical element ensures glare control for the viewer who
  • the brightness distribution of light over the optical element is not uniform, because in the vicinity of the lamp, more light rays are coupled into the optical element than for example in the edge areas of the optical element.
  • the lamp is through the optical element cannot be seen directly through it, but because of the larger one Brightness can at least be guessed at by the viewer.
  • this object is achieved by a lamp solved the features of claim 1.
  • the reflector is arranged and shaped with respect to the lamp that essentially only light rays reflected at the reflector pass through the radiation opening can leave the optical element is achieved that the outgoing from the lamp Light rays evenly distributed on the optical element in this couple and with an exit angle that is smaller than a predetermined limit exit angle is to exit this again.
  • microprisms of the optical element are arranged in a matrix (cross structure), whereby glare from the light emitted by the lamp in all Directions is achieved.
  • the arrangement and design of a reflector in a manner that in light rays reflected only at the reflector, the radiation opening of a Can leave lamp is already from the subsequently published EP 1 130 01 A2 known. However, there are no microprisms in one with this lamp Matrix structure provided.
  • one of the EP 0 860 655 A2 known lamp arrangement of the reflector shaped so that only Light rays reflected at the reflector leave the radiation opening. This special However, the arrangement does not serve to improve the light emission of the lamp, but only the suppression of the disturbing so-called EMI radiation.
  • the reflector consists of a material that contains the interfering radiation components absorbed.
  • the inside of the reflector is preferably designed to be diffusely reflective around the To intensify the effect of the uniform distribution of light rays.
  • FIG. 3 is a preferred embodiments of the invention Lamp shown schematically. The optical used in this lamp Element is shown in Fig. 1.
  • the first embodiment shown in FIG. 3 shows a lamp 10 with two elongated Lamps 11, such as fluorescent tubes.
  • the lamps 11 are one enclosed corresponding reflector 12, which has a radiation opening on its underside 13 has.
  • the reflector 12 can either itself as the housing of the lamp serve or arranged in a corresponding (not shown) lamp housing and be attached.
  • an optical one Element 14 used, which is essentially that known in FIG. 1 Element corresponds.
  • the optical element 14 arranged in or in front of the radiation opening 13 serves the purpose of Redirection of light rays entering and exiting this 15 such that their exit angle is limited, i.e. smaller than a predetermined one Limit exit angle is about 60-70 °.
  • the optical element 14 has one plate-shaped core 16 made of transparent material, such as, for example, acrylic glass, which is covered on one side with microprisms 17, which form furrows 18 - starting from its root - taper, taking the entirety of the microprism cover surfaces the light entry surface and the other side of the core 17 the light exit surface forms.
  • 3 are the microprisms 17 arranged in rows and rows in a matrix (cross structure).
  • the optical element 12 it is also conceivable for the optical element 12 to be reversed into the luminaire 10 install.
  • the entirety of the microprism cover surfaces forms the Light exit surface and the other side of the core 17, the light entry surface.
  • the lamps 11 are laterally offset from the radiation opening 13 or the optical one Element 14 arranged. Furthermore, the reflector 12 is in relation to the lamps 11 arranged and shaped that the light rays emitted by the lamps 11 are not emitted directly through the radiation opening 13, i.e. essentially only at the reflector 12 reflected light rays 15, the radiation opening 13 through the optical Can leave element 14.
  • the inside of the reflector 12 is preferably diffuse designed to be reflective, such as painted white or highly reflective Teflon coated.
  • the construction of the optical element 14 with microprism structure 17 results in glare control of the light rays for the viewer, i.e. a Limiting the exit angle of the light rays 15 from the lamp 10. Because no or almost no light rays directly from the lamps 11 through the optical Element 14 are emitted, but essentially only on the inside of the Reflector 12 couple reflected light rays 15 into the optical element 14 and leaving this down again, one achieves an even or at least almost uniform illumination of the entire surface of the optical element 14. This effect is further enhanced by a diffusely reflecting inside of the reflector strengthened.
  • a second embodiment of a lamp 10 described which is not the subject of the claims.
  • the second embodiment differs from the first Embodiment in that a total of two optical elements 14-1 and 14-2 in or are arranged in front of the radiation opening 13 of the reflector 12. Furthermore corresponds to the structure of the lamp 10, i.e. in particular the arrangement of the lamps 11 and the reflector 12, that of the first embodiment.
  • Both optical elements 14-1, 14-2 of the lamp 10 are constructed according to FIG. 4. in the In contrast to the optical element according to FIG. 1 with a matrix-like arrangement Microprism structure 17 has the microprisms 17 of this embodiment elongated structure. In other words, the microprisms extend in one Direction of expansion of the optical element over the substantially entire length of the optical element 10 (longitudinal structure) while in the other direction are arranged sequentially. Due to the elongated microprisms 17 Cross glare achieved perpendicular to the direction of extension of the microprisms 17.
  • the first optical element 14-1 is such arranged that the elongated microprisms 17 parallel to the longitudinal axis of the Lamps 11 is aligned, while the direction of extension of the microprisms 17 of the second optical element 14-2 extends transversely to the longitudinal axis of the lamps 11.
  • the Optical elements 14-1 and 14-2 can also be in the reverse order or be mounted in front of the radiation opening 13 of the reflector 12 without this would have an impact on the optical properties of the entire arrangement.
  • the gaps or furrows are 18th between the adjacent microprisms 17, preferably with a reflective one Material 19, for example a metal foil with high reflectivity, covered.
  • a reflective one Material 19 for example a metal foil with high reflectivity
  • An elongated lamp 11, for example a fluorescent tube, is of a corresponding, also surround elongated reflector 12 or reflector housing.
  • the Reflector 12 has a radiation opening 13 on its underside, which is connected to a optical element 14-1 is closed.
  • the optical element 14-1 corresponds to that in Fig. 4 embodiment shown, so in particular has a longitudinal structure of the Microprisms 17.
  • the optical element 14-1 is as shown in Fig. 6 aligned that the microprisms 17 extend transversely to the longitudinal axis of the lamp 11.
  • the inside of the Reflector 12 is designed to be reflective and the lamp 11 is not laterally offset but arranged centrally above the optical element 14-1. Still can even in this case, uniform illumination of the optical element 14-1 and glare control of the light rays, i.e.
  • a limitation of the exit angle of the Rays of light can be obtained from the lamp 10 because the mirror reflecting Inside of the reflector 12 directs the light transversely to the longitudinal axis of the lamp 11 and thus in this direction for both glare control and uniform Illumination ensures the optical element 14-1 due to the longitudinal structure of the microprisms 17 transverse to the longitudinal axis of the lamp for glare control parallel to the longitudinal axis of the lamp, and uniform illumination parallel to the longitudinal direction the lamp is automatically given by the elongated shape of the lamp.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Finger-Pressure Massage (AREA)
  • Road Signs Or Road Markings (AREA)

Abstract

The reflector (12) is so arranged and designed in relation to e.g. the fluorescent tube (11), that essentially only the light beam (15) reflected at the reflector (12), can leave the radiation opening (13) through the optical element (14,14-1,14-2). The inner side of the reflector (12) is designed to produce diffuse reflecting.

Description

Die vorliegende Erfindung betrifft eine Leuchte mit einem optischen Element mit Mikroprismenstruktur zur Begrenzung des Austrittswinkels der Lichtstrahlen aus der Leuchte nach dem Oberbegriff von Patentanspruch 1.The present invention relates to a lamp with an optical element Microprism structure for limiting the exit angle of the light rays from the Luminaire according to the preamble of claim 1.

Durch optische Elemente der oben genannten Art soll erreicht werden, daß der Austrittswinkel von Lichtstrahlen aus der Leuchte begrenzt wird, d.h. kleiner als ein vorbestimmter Grenzaustrittswinkel ist, um eine Blendung für den Betrachter zu verringern. Darüber hinaus bewirkt eine solches optisches Element auch einen mechanischen Schutz der Leuchte und insbesondere der Lampe im Innern der Leuchte.By optical elements of the type mentioned above should be achieved that the Angle of exit of light rays from the luminaire is limited, i.e. smaller than one predetermined limit exit angle is to cause glare for the viewer reduce. In addition, such an optical element also causes one mechanical protection of the lamp and especially the lamp inside the lamp.

Eine solches optisches Element ist beispielsweise aus dem österreichischen Patent AT-B-403,403 bekannt. Wie in Fig. 1 gezeigt, weist das bekannte optische Element auf seiner der Lampe der Leuchte zugewandten Seite in Reihen und Zeilen angeordnete pyramidenartige Profilierungen 2, sogenannte Mikroprismen, auf, die als Pyramidenstümpfe ausgehend von einem plattenförmigen Kern 3 ausgebildet sind und eine parallel zur Basisfläche (Lichtaustrittsfläche) des Kerns 3 liegende obere Begrenzungsfläche (Lichteinttittsfläche) aufweisen. Das gesamte optische Element 1 besteht vollständig aus einem glasklaren bzw. transparenten Material.Such an optical element is, for example, from the Austrian patent AT-B-403.403 known. As shown in Fig. 1, the known optical element has its side facing the lamp of the lamp arranged in rows and rows pyramid-like profiles 2, so-called microprisms, on the truncated pyramids are formed from a plate-shaped core 3 and a parallel to the base surface (light exit surface) of the core 3 lying upper boundary surface (Light entry surface). The entire optical element 1 consists entirely of a crystal clear or transparent material.

Ein weiteres optisches Element der eingangs genannten Art ist beispielsweise in der WO 97/36131 offenbart. Wie in Fig. 2 gezeigt, weist die bekannte Leuchte 4 eine Lampe 5, wie beispielsweise eine Leuchtstoffröhre oder dergleichen, ein die Lampe 5 umgebendes Reflektorgehäuse 6 und ein optisches Element 1 auf. Das optische Element 1 besteht ebenfalls aus einem plattenförmigen Kern 3 aus tmnsparentem Material, der an einer Seite mit Mikroprismen 2 besetzt ist, die sich unter Bildung von Furchen 7 - von ihrer Wurzel ausgehend - verjüngen, wobei die Gesamtheit der Mikroprismen-Deckflächen die Lichteintrittsfläche 8 bildet. Um die Begrenzung des Austrittswinkels der Lichtstrahlen aus dem optischen Element 1 zu gewährleisten, sind auf der anderen Seite des Kerns 3, der die Lichtaustrittsfläche bildet, Linsen 9 vorgesehen.Another optical element of the type mentioned at the outset is, for example, in FIG WO 97/36131 discloses. As shown in Fig. 2, the known lamp 4 has a Lamp 5, such as a fluorescent tube or the like, on the lamp 5 surrounding reflector housing 6 and an optical element 1. The optical element 1 also consists of a plate-shaped core 3 made of low-cost material is covered on one side with microprisms 2, which form furrows 7 - starting from their roots - rejuvenate, taking the entirety of the microprism cover surfaces the light entry surface 8 forms. To limit the exit angle to ensure the light rays from the optical element 1 are on the other Side of the core 3, which forms the light exit surface, lenses 9 are provided.

Eine Leuchte mit einer Lampe, einem die Lampe umgebenden Reflektor sowie einem in Abstrahlrichtung vor der Lampe angeordneten optischen Element der oben beschriebenen Art ist beispielsweise aus der EP 0 911 577 A2 bekannt. Auch die JP-A-10 106319 beschreibt eine ähnliche Leuchte, bei der in Abstrahlrichtung zwei optische Elemente hintereinander angeordnet sind, wobei die Mikroprismenstrukturen dieser optischen Elemente parallel zueinander ausgerichtet sind.A lamp with a lamp, a reflector surrounding the lamp and a in the radiation direction in front of the lamp arranged optical element of the above The type described is known, for example, from EP 0 911 577 A2. Also the JP-A-10 106319 describes a similar lamp, in which two are in the direction of radiation optical elements are arranged one behind the other, the Microprismatic structures of these optical elements aligned parallel to each other are.

Bei den bekannten Leuchtensystemen ist zwar durch die Verwendung des entsprechend gestalteten optischen Elements eine Entblendung für den Betrachter gewährleistet, die Helligkeitsverteilung des Lichts über das optische Element ist jedoch nicht gleichrnäßig, da in der Nähe der Lampe mehr Lichtstrahlen in das optische Element einkoppeln als zum Beispiel in den Randbereichen des optischen Elements. Die Lampe ist zwar durch das optische Element hindurch nicht direkt zu erkennen, aber aufgrund der größeren Helligkeit kann ihre Position vom Betrachter zumindest erahnt werden.In the known lighting systems is by using the corresponding designed optical element ensures glare control for the viewer who However, the brightness distribution of light over the optical element is not uniform, because in the vicinity of the lamp, more light rays are coupled into the optical element than for example in the edge areas of the optical element. The lamp is through the optical element cannot be seen directly through it, but because of the larger one Brightness can at least be guessed at by the viewer.

Um eine gleiclunäßige Lichtabstrahlung der Beleuchtungsanordnung zu erzielen, ist es beispielsweise aus der WO 95/12782 bekannt, Licht von einer Lampe seitlich in ein Lichtleitelement einzukoppeln, welches das Licht vornehmlich parallel zu seiner Lichtaustrittsfläche transportiert. Auf der Lichtaustrittsfläche des Lichtleitelements ist eine Mikroprismenstwktur angebracht, die einerseits ein Auskoppeln des Lichts aus dem Lichtleiter ermöglicht und andererseits den Austrittswinkel der Beleuchtungsanordnung beschränkt. Es sei allerdings darauf hingewiesen, daß die in der WO 95/12782 beschriebene Beleuchtungsanordnung eine Hintergrundbeleuchtung für Displays oder andere Anzeigen und für Raumleuchten nur bedingt geeignet ist.It is in order to achieve uniform light radiation from the lighting arrangement known for example from WO 95/12782, light from a lamp into a side Coupling light guide element, which the light mainly parallel to it Light exit surface transported. Is on the light exit surface of the light guide a micro prism structure attached, which on the one hand, decouples the light from enables the light guide and on the other hand the exit angle of the lighting arrangement limited. However, it should be noted that the WO 95/12782 described lighting arrangement a backlight for Displays or other displays and is only suitable for room lighting to a limited extent.

Ausgehend von dem vorgenannten Stand der Technik ist es eine Aufgabe der vorliegenden Erfindung, eine Leuchte bereitzustellen, bei der der Austrittswinkel der Lichtstrahlen zum Zwecke der Entblendung begrenzt ist und gleichzeitig auf einfache Weise und insbesondere ohne die Verwendung eines Lichtleitelements eine möglichst gleichmäßige Abstrahlung des Lichts erzielt wird.Starting from the aforementioned prior art, it is an object of the present Invention to provide a lamp in which the exit angle of the Beams of light for the purpose of glare control is limited and at the same time simple Way and in particular without the use of a light guide as possible uniform light emission is achieved.

Gemäß einem ersten Aspekt der Erfindung wird diese Aufgabe durch eine Leuchte mit den Merkmalen von Patentanspruch 1 gelöst.According to a first aspect of the invention, this object is achieved by a lamp solved the features of claim 1.

Dadurch, daß der Reflektor so in Bezug auf die Lampe angeordnet und geformt ist, daß im wesentlichen nur am Reflektor reflektierte Lichtstrahlen die Abstrahlöffnung durch das optische Element verlassen können, wird erreicht, daß die von der Lampe ausgehenden Lichtstrahlen gleichmäßig verteilt auf das optische Element in dieses einkoppeln und mit einem Austrittswinkel, der kleiner als ein vorbestimmter Grenzaustrittswinkel ist, wieder aus diesem austreten.In that the reflector is arranged and shaped with respect to the lamp that essentially only light rays reflected at the reflector pass through the radiation opening can leave the optical element is achieved that the outgoing from the lamp Light rays evenly distributed on the optical element in this couple and with an exit angle that is smaller than a predetermined limit exit angle is to exit this again.

Die Mikroprismen des optischen Elements sind dabei matrixartig angeordnet (Kreuzstruktur), wodurch eine Entblendung des von der Leuchte abgegebenen Lichts in sämtlichen Richtungen erzielt wird.The microprisms of the optical element are arranged in a matrix (cross structure), whereby glare from the light emitted by the lamp in all Directions is achieved.

Die Anordnung und Ausgestaltung eines Reflektors in einer Art und Weise, daß im wesentlichen nur am Reflektor reflektierte Lichtstrahlen die Abstrahlöffnung einer Leuchte verlassen können, ist bereits aus der nachveröffentlichten EP 1 130 01 A2 bekannt. Allerdings sind bei dieser Leuchte keine Mikroprismen in einer Matrixstruktur vorgesehen. Darüber hinaus ist auch bei einer aus der EP 0 860 655 A2 bekannten Leuchtenanordnung der Reflektor so geformt, daß nur am Reflektor reflektierte Lichtstrahlen die Abstrahlöffnung verlassen. Diese spezielle Anordnung dient aber nicht einer Verbesserung der Lichtabstrahlung der Leuchte, sondern ausschließlich der Unterdrückung der störenden sog. EMI-Strahlung. Der Reflektor besteht hierzu aus einem Material, daß die störenden Strahlungsanteile absorbiert.The arrangement and design of a reflector in a manner that in light rays reflected only at the reflector, the radiation opening of a Can leave lamp is already from the subsequently published EP 1 130 01 A2 known. However, there are no microprisms in one with this lamp Matrix structure provided. In addition, one of the EP 0 860 655 A2 known lamp arrangement of the reflector shaped so that only Light rays reflected at the reflector leave the radiation opening. This special However, the arrangement does not serve to improve the light emission of the lamp, but only the suppression of the disturbing so-called EMI radiation. The For this purpose, the reflector consists of a material that contains the interfering radiation components absorbed.

Vorzugsweise ist die Innenseite des Reflektors diffus reflektierend ausgebildet, um den Effekt der gleichmäßigen Verteilung der Lichtstrahlen noch zu verstärken. The inside of the reflector is preferably designed to be diffusely reflective around the To intensify the effect of the uniform distribution of light rays.

Weitere vorteilhafte Ausgestaltungen und Weiterbildungen der vorliegenden Erfindung sind Gegenstand der Unteransprüche.Further advantageous refinements and developments of the present invention are the subject of the subclaims.

Die Erfindung wird nachfolgend anhand verschiedener bevorzugter Ausführungsbeispiele unter Bezugnahme auf die beiliegende Zeichnung näher beschrieben. Darin zeigen:

Fig. 1
ein bekanntes optisches Element in perspektivischer Darstellung aus Sicht der Lampe der Leuchte;
Fig. 2
eine bekannte Leuchtenanordnung im Schnitt;
Fig. 3
ein erstes Ausführungsbeispiel der Leuchte gemäß der vorliegenden Erfindung in perspektivischer schematischer Darstellung aus Sicht des Betrachters;
Fig. 4
ein optisches Element in perspektivischer Darstellung aus Sicht der Lampe einer Leuchte, welches in eine Leuchte einsetzbar ist; die nicht Gegenstand der Ansprüche ist.
Fig. 5
ein zweites Ausführungsbeispiel einer Leuchte, welches nicht Gegenstand der Ansprüche ist, in perspektivischer schematischer Darstellung aus Sicht des Betrachterts; und
Fig. 6
ein drittes Ausführungsbeispiel einer Leuchte, welches nicht Gegenstand der Ansprüche ist, in perspektivischer schematischer Darstellung aus Sicht des Betrachters.
The invention is described below with reference to various preferred embodiments with reference to the accompanying drawings. In it show:
Fig. 1
a known optical element in perspective from the perspective of the lamp of the lamp;
Fig. 2
a known lamp arrangement in section;
Fig. 3
a first embodiment of the lamp according to the present invention in a perspective schematic representation from the perspective of the beholder;
Fig. 4
an optical element in perspective from the perspective of the lamp of a lamp, which can be used in a lamp; which is not the subject of the claims.
Fig. 5
a second embodiment of a lamp, which is not the subject of the claims, in a perspective schematic representation from the perspective of the viewer; and
Fig. 6
a third embodiment of a lamp, which is not the subject of the claims, in a perspective schematic representation from the perspective of the beholder.

In der Fig. 3 ist ein bevorzugtes Ausführungsbeispiele der erfindungsgemäßen Leuchte schematisch dargestellt. Das in diese Leuchte eingesetzte optische Element ist in Fig. 1 gezeigt.3 is a preferred embodiments of the invention Lamp shown schematically. The optical used in this lamp Element is shown in Fig. 1.

Das erste Ausführungsbeispiel gemäß Fig. 3 zeigt eine Leuchte 10 mit zwei länglichen Lampen 11, wie beispielsweise Leuchtstoffröhren. Die Lampen 11 werden von einem entsprechenden Reflektor 12 umschlossen, welches an seiner Unterseite eine Abstrahlöffnung 13 aufweist. Der Reflektor 12 kann entweder selbst als Gehäuse der Leuchte dienen oder in einem entsprechenden (nicht gezeigten) Leuchtengehäuse angeordnet und befestigt sein. In oder vor der Abstrahlöffnung 13 des Reflektors 12 ist ein optisches Element 14 eingesetzt, das im wesentlichen dem in Fig. 1 dargestellten bekannten Element entspricht.The first embodiment shown in FIG. 3 shows a lamp 10 with two elongated Lamps 11, such as fluorescent tubes. The lamps 11 are one enclosed corresponding reflector 12, which has a radiation opening on its underside 13 has. The reflector 12 can either itself as the housing of the lamp serve or arranged in a corresponding (not shown) lamp housing and be attached. In or in front of the radiation opening 13 of the reflector 12 is an optical one Element 14 used, which is essentially that known in FIG. 1 Element corresponds.

Das in oder vor der Abstrahlöffnung 13 angeordnete optische Element 14 dient der Umlenkung von in dieses eintretenden und wieder aus diesem austretenden Lichtstrahlen 15, derart, daß deren Austrittswinkel begrenzt ist, d.h. kleiner als ein vorbestimmter Grenzaustrittswinkel von etwa 60-70° ist. Hierzu weist das optische Element 14 einen plattenförmigen Kern 16 aus transparentem Material, wie zum Beispiel Acrylglas, auf, der an einer Seite mit Mikroprismen 17 besetzt ist, die sich unter Bildung von Furchen 18 - von ihrer Wurzel ausgehend - verjüngen, wobei die Gesamtheit der Mikroprismen-Deckflächen die Lichteintrittsfläche und die andere Seite des Kerns 17 die Lichtaustrittsfläche bildet. Im ersten Ausführungsbeispiel von Fig. 3 sind die Mikroprismen 17 matrixartig in Reihen und Zeilen angeordnet (Kreuzstruktur).The optical element 14 arranged in or in front of the radiation opening 13 serves the purpose of Redirection of light rays entering and exiting this 15 such that their exit angle is limited, i.e. smaller than a predetermined one Limit exit angle is about 60-70 °. For this purpose, the optical element 14 has one plate-shaped core 16 made of transparent material, such as, for example, acrylic glass, which is covered on one side with microprisms 17, which form furrows 18 - starting from its root - taper, taking the entirety of the microprism cover surfaces the light entry surface and the other side of the core 17 the light exit surface forms. 3 are the microprisms 17 arranged in rows and rows in a matrix (cross structure).

Alternativ ist es auch denkbar, das optische Element 12 umgekehrt in die Leuchte 10 einzubauen. In diesem Fall bildet die Gesamtheit der Mikroprismen-Deckflächen die Lichtaustrittsfläche und die andere Seite des Kerns 17 die Lichteintrittsfläche.Alternatively, it is also conceivable for the optical element 12 to be reversed into the luminaire 10 install. In this case, the entirety of the microprism cover surfaces forms the Light exit surface and the other side of the core 17, the light entry surface.

Die Lampen 11 sind seitlich versetzt zu der Abstrahlöffnung 13 bzw. dem optischen Element 14 angeordnet. Weiter ist der Reflektor 12 so in Bezug auf die Lampen 11 angeordnet und geformt, daß die von den Lampen 11 abgestrahlten Lichtstrahlen 15 nicht direkt durch die Abstrahlöffnung 13 abgestrahlt werden, d.h. im wesentlichen nur am Reflektor 12 reflektierte Lichtstrahlen 15 die Abstrahlöffnung 13 durch das optische Element 14 verlassen können. Vorzugsweise ist die Innenseite des Reflektors 12 diffus reflektierend ausgebildet, wie zum Beispiel weiß lackiert oder mit hochreflektierendem Teflon beschichtet.The lamps 11 are laterally offset from the radiation opening 13 or the optical one Element 14 arranged. Furthermore, the reflector 12 is in relation to the lamps 11 arranged and shaped that the light rays emitted by the lamps 11 are not emitted directly through the radiation opening 13, i.e. essentially only at the reflector 12 reflected light rays 15, the radiation opening 13 through the optical Can leave element 14. The inside of the reflector 12 is preferably diffuse designed to be reflective, such as painted white or highly reflective Teflon coated.

Die Konstruktion des optischen Elements 14 mit Mikroprismenstruktur 17 bewirkt in bekannter Weise eine Entblendung der Lichtstrahlen für den Betrachter, d.h. eine Begrenzung des Austrittswinkels der Lichtstrahlen 15 aus der Leuchte 10. Dadurch, daß keine oder nahezu keine Lichtstrahlen direkt von den Lampen 11 durch das optische Element 14 abgestrahlt werden, sondern im wesentlichen nur an der Innenseite des Reflektors 12 reflektierte Lichtstrahlen 15 in das optische Element 14 einkoppeln und dieses nach unten wieder verlassen, erreicht man eine gleichmäßige oder zumindest nahezu gleichmäßige Ausleuchtung der gesamten Fläche des optischen Elements 14. Dieser Effekt wird durch eine diffus reflektierende Innenseite des Reflektors noch verstärkt.The construction of the optical element 14 with microprism structure 17 results in glare control of the light rays for the viewer, i.e. a Limiting the exit angle of the light rays 15 from the lamp 10. Because no or almost no light rays directly from the lamps 11 through the optical Element 14 are emitted, but essentially only on the inside of the Reflector 12 couple reflected light rays 15 into the optical element 14 and leaving this down again, one achieves an even or at least almost uniform illumination of the entire surface of the optical element 14. This effect is further enhanced by a diffusely reflecting inside of the reflector strengthened.

Anstelle der Verwendung von zwei länglichen Leuchtstoffröhren 11, wie dies in Fig. 3 gezeigt ist, ist es ebenso möglich, eine ringförmige Leuchtstoffröhre 11 außerhalb einer entsprechenden Abstrahlöffnung 13 des Reflektors 12 vorzusehen. Darüber hinaus sind selbstverständlich auch beliebige andere Lampenformen und -arten fiir den Einsatz in der Leuchte 10 gemäß der vorliegenden Erfindung denkbar. Das gleiche gilt im übrigen auch für die nachfolgend beschriebenen Ausführungsbeispiele.Instead of using two elongated fluorescent tubes 11, as shown in FIG. 3 is shown, it is also possible to use an annular fluorescent tube 11 outside of one provide corresponding radiation opening 13 of the reflector 12. Beyond that of course, any other lamp shapes and types for use in the lamp 10 according to the present invention is conceivable. The same applies otherwise also for the exemplary embodiments described below.

Anhand der Fig. 4 und 5 wird nun ein zweites Ausführungsbeispiel einer Leuchte 10 beschrieben, das nicht Gegenstand der Ansprüche ist. Das zweite Ausführungsbeispiel unterscheidet sich von dem ersten Ausführungsbeispiel dadurch, daß insgesamt zwei optische Elemente 14-1 und 14-2 in oder vor der Abstrahlöffnung 13 des Reflektors 12 angeordnet sind. Im übrigen entspricht der Aufbau der Leuchte 10, d.h. insbesondere die Anordnung der Lampen 11 und des Reflektors 12, dem des ersten Ausführungsbeispiels.4 and 5, a second embodiment of a lamp 10 described, which is not the subject of the claims. The second embodiment differs from the first Embodiment in that a total of two optical elements 14-1 and 14-2 in or are arranged in front of the radiation opening 13 of the reflector 12. Furthermore corresponds to the structure of the lamp 10, i.e. in particular the arrangement of the lamps 11 and the reflector 12, that of the first embodiment.

Beide optischen Elemente 14-1, 14-2 der Leuchte 10 sind gemäß Fig. 4 aufgebaut. Im Gegensatz zu dem optischen Element gemäß Fig. 1 mit einer matrixartig angeordneten Mikroprismenstruktur 17 haben die Mikroprismen 17 dieses Ausführungsbeispiels eine längliche Struktur. Anders ausgedrückt erstrecken sich die Mikroprisemn in einer Ausdehnungsrichtung des optischen Elements über die im wesentlichen gesamte Länge des optischen Elements 10 (Längsstruktur), während sie in der anderen Richtung aufeinander folgend angeordnet sind. Durch die länglichen Mikroprismen 17 wird eine Querentblendung senkrecht zur Erstreckungsrichtung der Mikroprismen 17 erzielt. Both optical elements 14-1, 14-2 of the lamp 10 are constructed according to FIG. 4. in the In contrast to the optical element according to FIG. 1 with a matrix-like arrangement Microprism structure 17 has the microprisms 17 of this embodiment elongated structure. In other words, the microprisms extend in one Direction of expansion of the optical element over the substantially entire length of the optical element 10 (longitudinal structure) while in the other direction are arranged sequentially. Due to the elongated microprisms 17 Cross glare achieved perpendicular to the direction of extension of the microprisms 17.

Ordnet man deshalb zwei derartige optische Elemente 14-1, 14-2 mit Längsstruktur parallel übereinander an, wobei die Erstreckungsrichtung der Mikroprismen 17 des einen optischen Elements 14-1 gegenüber der Erstreckungsrichtung der Mikroprismen 17 des anderen optischen Elements 14-2 um 90° gedreht ist, d.h. die Mikroprismen des ersten optischen Elements 14-1 quer zu den Mikroprismen des zweiten optischen Elements 14-2 verlaufen, so erzielt man den gleichen Effekt wie mit einem einzigen optischen Element 14 mit Kreuzstruktur. Allerdings ist die Herstellung der optischen Elemente 14-1, 14-2 mit Längsstruktur einfacher und damit kostengünstiger als die Herstellung der optischen Elemente 14 mit Kreuzstruktur.Therefore, one arranges two such optical elements 14-1, 14-2 with a longitudinal structure parallel to one another, the direction of extension of the microprisms 17 of the an optical element 14-1 opposite to the direction of extension of the microprisms 17 of the other optical element 14-2 is rotated by 90 °, i.e. the microprisms of the first optical element 14-1 transverse to the microprisms of the second optical Elements 14-2 run, you get the same effect as with a single optical element 14 with a cross structure. However, the manufacture of the optical Elements 14-1, 14-2 with a longitudinal structure simpler and therefore cheaper than that Production of the optical elements 14 with a cross structure.

Im Ausführungsbeispiel von Fig. 5 ist das erste optische Element 14-1 derart angeordnet, daß die länglichen Mikroprismen 17 parallel zu der Längsachse der Lampen 11 ausgerichtet ist, während die Erstreckungsrichtung der Mikroprismen 17 des zweiten optischen Elements 14-2 quer zur Längsachse der Lampen 11 verläuft. Die optischen Elemente 14-1 und 14-2 können aber ebenso in umgekehrter Reihenfolge in oder vor der Abstrahlöffnung 13 des Reflektors 12 montiert sein, ohne daß dies einen Einfluß auf die optischen Eigenschaften der gesamten Anordnung hätte.5, the first optical element 14-1 is such arranged that the elongated microprisms 17 parallel to the longitudinal axis of the Lamps 11 is aligned, while the direction of extension of the microprisms 17 of the second optical element 14-2 extends transversely to the longitudinal axis of the lamps 11. The Optical elements 14-1 and 14-2 can also be in the reverse order or be mounted in front of the radiation opening 13 of the reflector 12 without this Would have an impact on the optical properties of the entire arrangement.

Wie in Fig. 4 außerdem teilweise angedeutet, sind die Zwischenräume bzw. Furchen 18 zwischen den angrenzenden Mikroprismen 17 vorzugsweise mit einem reflektierenden Material 19, beispielsweise einer Metallfolie mit hohem Reflexionsvermögen, abgedeckt. Hierdurch wird erreicht, daß nur das Licht, das von den Lampen 11 über den Reflektor 12 auf die die Lichteintrittsfläche bildenden Deckflächen der Mikroprismen 17 trifft, durch das optische Element 14-1, 14-2 abgestrahlt wird. Die auf die Abdeckung 19 auftreffenden Lichtstrahlen werden in das Innere der Leuchte 10 zurück reflektiert und von der Innenseite des Reflektors 12 wieder in Richtung auf das optische Element 14-1, 14-2 zurück reflektiert.As also partially indicated in FIG. 4, the gaps or furrows are 18th between the adjacent microprisms 17, preferably with a reflective one Material 19, for example a metal foil with high reflectivity, covered. This ensures that only the light from the lamps 11 on the reflector 12 onto the cover surfaces of the microprisms forming the light entry surface 17 hits, is emitted by the optical element 14-1, 14-2. The on the Cover 19 incident light rays are returned to the interior of the lamp 10 reflected and from the inside of the reflector 12 back towards the optical Element 14-1, 14-2 reflected back.

Durch eine derartige reflektierende Abdeckung 19 kann der Wirkungsgrad des optischen Elements 14-1, 14-2 weiter erhöht werden. Anstelle der in Fig. 4 gezeigten Abdeckung 19 ist es auch möglich, die Furchen 18 zwischen den Mikroprismen 17 vollständig mit einem reflektierenden Material zu füllen. In dieser Weise werden auch die Seitenwände der Mikroprismen 17 total reflektierend ausgebildet, so daß Lichtstrahlen, die von innen auf diese Seitenwände auftreffen, die Mikroprismen 17 nicht verlassen können.With such a reflective cover 19, the efficiency of the optical Elements 14-1, 14-2 can be further increased. Instead of the cover shown in Fig. 4 19, it is also possible to completely fill the furrows 18 between the microprisms 17 a reflective material. In this way, the side walls of the micro prisms 17 are totally reflective, so that light rays coming from inside impinge on these side walls, the microprisms 17 cannot leave.

Die hier am Beispiel des optischen Elements 14-1, 14-2 von Fig. 4 genannten Maßnahmen können selbstverständlich auch bei allen anderen Ausführungsformen der der Leuchte, insbesondere bei den Ausführungsbeispielen der Fig. 3 und 6, in analoger Weise angewendet werden. The measures mentioned here using the example of the optical element 14-1, 14-2 from FIG. 4 can of course also in all other embodiments of the the lamp, in particular in the exemplary embodiments of FIGS. 3 and 6, be applied in an analogous manner.

Anhand von Fig. 6 wird nun ein drittes Ausführungsbeispiel einer Leuchte 10 beschrieben, das nicht Gegenstand der Ansprüche ist.6, a third exemplary embodiment of a lamp 10 is now shown described, which is not the subject of the claims.

Eine längliche Lampe 11, beispielsweise eine Leuchtstoffröhre, ist von einem entsprechenden, ebenfalls länglichen Reflektor 12 oder Reflektorgehäuse umgeben. Der Reflektor 12 weist an seiner Unterseite eine Abstrahlöffnung 13 auf, die mit einem optischen Element 14-1 verschlossen ist. Das optische Element 14-1 entspricht der in Fig. 4 gezeigten Ausführungsform, besitzt also insbesondere eine Längsstruktur der Mikroprismen 17. Das optische Element 14-1 ist, wie in Fig. 6 gezeigt, derart ausgerichtet, daß die Mikroprismen 17 quer zur Längsachse der Lampe 11 verlaufen.An elongated lamp 11, for example a fluorescent tube, is of a corresponding, also surround elongated reflector 12 or reflector housing. The Reflector 12 has a radiation opening 13 on its underside, which is connected to a optical element 14-1 is closed. The optical element 14-1 corresponds to that in Fig. 4 embodiment shown, so in particular has a longitudinal structure of the Microprisms 17. The optical element 14-1 is as shown in Fig. 6 aligned that the microprisms 17 extend transversely to the longitudinal axis of the lamp 11.

Im Gegensatz zu den beiden obigen Ausführungsbeispielen ist hier die Innenseite des Reflektors 12 spiegelnd reflektierend ausgebildet und die Lampe 11 ist nicht seitlich versetzt sondern mittig über dem optischen Element 14-1 angeordnet. Dennoch kann auch in diesem Fall eine gleichmäßige Ausleuchtung des optischen Elements 14-1 und eine Entblendung der Lichtstrahlen, d.h. eine Begrenzung des Austrittswinkels der Lichtstrahlen aus der Leuchte 10 erzielt werden, da die spiegelad reflektierende Innenseite des Reflektors 12 das Licht quer zur Längsachse der Lampe 11 lenkt und damit in dieser Richtung sowohl für eine Entblendung als auch für eine gleichmäßige Ausleuchtung sorgt, das optische Element 14-1 aufgrund der Längsstruktur der Mikroprismen 17 quer zur Längsachse der Lampe für eine Entblendung parallel zur Längsachse der Lampe sorgt, und eine gleichmäßige Ausleuchtung parallel zur Längsrichtung der Lampe durch die längliche Form der Lampe automatisch gegeben ist.In contrast to the two exemplary embodiments above, the inside of the Reflector 12 is designed to be reflective and the lamp 11 is not laterally offset but arranged centrally above the optical element 14-1. Still can even in this case, uniform illumination of the optical element 14-1 and glare control of the light rays, i.e. a limitation of the exit angle of the Rays of light can be obtained from the lamp 10 because the mirror reflecting Inside of the reflector 12 directs the light transversely to the longitudinal axis of the lamp 11 and thus in this direction for both glare control and uniform Illumination ensures the optical element 14-1 due to the longitudinal structure of the microprisms 17 transverse to the longitudinal axis of the lamp for glare control parallel to the longitudinal axis of the lamp, and uniform illumination parallel to the longitudinal direction the lamp is automatically given by the elongated shape of the lamp.

Wie im Falls des ersten Ausführungsbeispiels können auch bei den Leuchten 10 gemäß zweiten und dritten Ausführungsbeispiel die optischen Elemente 14-1, 14-2 so in oder vor die Abstrahlöffnung 13 der Leuchte 10 angeordnet werden, daß entweder die Gesamtheit der Mikroprismen-Deckflächen die Lichteintrittsfläche und die andere Seite des Kerns die Lichtaustrittsseite bildet oder umgekehrt.As in the case of the first exemplary embodiment, the lamps 10 according to FIG second and third embodiments, the optical elements 14-1, 14-2 so in or be arranged in front of the radiation opening 13 of the lamp 10 that either the The totality of the microprism cover surfaces, the light entry surface and the other side of the core forms the light exit side or vice versa.

Claims (6)

  1. Luminaire, having at least one lamp (11); a reflector (12) surrounding the lamp (11), the inner side of which reflector towards the lamp is formed to be reflecting and which reflector has an emission opening (13) for emission of the light; and an optical element (14; 14-1, 14-2), arranged in or before the emission opening (13), for deflecting light beams (15) entering into this optical element and again exiting therefrom, such that the exit angle of the light beams is smaller than a predetermined limit exit angle, the optical element (14; 14-1, 14-2) having a plate-like core (16) of transparent material which is occupied on one side with microprisms (17) which with the formation of furrows (18) - starting from their roots - taper,
    characterized in that,
    the reflector (12) is so arranged and shaped with reference to the lamp (11) that in substance only light beams (15) reflected at the reflector (12) can leave the emission opening (13) through the optical element (14; 14-1, 14-2), and
    in that the microprisms (17) of the optical element (14) are arranged in a matrix-like manner.
  2. Luminaire according to claim 1,
    characterized in that,
    the inner side of the reflector (12) is formed to be diffusely reflecting.
  3. Luminaire according to claim 2,
    characterized in that,
    the inner side of the reflector (12) is painted white or coated with highly reflecting Teflon.
  4. Luminaire according to any of claims 1 to 3,
    characterized in that,
    two lamps (11), elongate and directed parallel to one another, are provided, which are arranged laterally outwardly offset with respect to the emission opening (13).
  5. Luminaire according to any of claims 1 to 3,
    characterized in that,
    an annular lamp (11) is provided, which is arranged laterally outwardly offset with respect to the emission opening (13).
  6. Luminaire according to any of claims 1 to 5,
    characterized in that,
    the furrows (18) between the microprisms (17) are covered over by means of a reflecting material (19) or are filled with a reflecting material, in order to prevent an entry of the light beams through the furrows (18) into the microprisms (17).
EP00929391A 1999-05-20 2000-04-19 Light Expired - Lifetime EP1179158B1 (en)

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DE19923225A DE19923225B4 (en) 1999-05-20 1999-05-20 Optical element for deflecting light rays and manufacturing processes
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DE29909282U DE29909282U1 (en) 1999-05-20 1999-05-27 lamp
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WO2000071927A1 (en) 2000-11-30
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NZ515195A (en) 2003-04-29
DK1179158T3 (en) 2003-08-04
AU4749700A (en) 2000-12-12
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ES2202127T3 (en) 2004-04-01
AU765828B2 (en) 2003-10-02
ATE244852T1 (en) 2003-07-15
JP2003500813A (en) 2003-01-07
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NO20015632L (en) 2001-11-19
CA2374023C (en) 2009-06-30

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