EP2239495A2 - Luminaire with optical element - Google Patents

Luminaire with optical element Download PDF

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Publication number
EP2239495A2
EP2239495A2 EP10158987A EP10158987A EP2239495A2 EP 2239495 A2 EP2239495 A2 EP 2239495A2 EP 10158987 A EP10158987 A EP 10158987A EP 10158987 A EP10158987 A EP 10158987A EP 2239495 A2 EP2239495 A2 EP 2239495A2
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EP
European Patent Office
Prior art keywords
optical element
cover
trough
shaped region
luminaire
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
EP10158987A
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German (de)
French (fr)
Other versions
EP2239495B1 (en
EP2239495A3 (en
Inventor
Patrick Gassner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zumtobel Lighting GmbH Austria
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Zumtobel Lighting GmbH Austria
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Publication of EP2239495A2 publication Critical patent/EP2239495A2/en
Publication of EP2239495A3 publication Critical patent/EP2239495A3/en
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Publication of EP2239495B1 publication Critical patent/EP2239495B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/002—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages with provision for interchangeability, i.e. component parts being especially adapted to be replaced by another part with the same or a different function
    • 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
    • F21V17/102—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 using gravity or suction
    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/02—Globes; Bowls; Cover glasses characterised by the 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
    • 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
    • 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

Definitions

  • the invention relates to a luminaire with a luminous means and a transparent cover which is arranged in a light exit region of the luminaire and comprises a trough-shaped region.
  • the invention is based on the object to provide a corresponding lamp in which the radiation properties can be easily and quickly modified.
  • a luminaire which has a luminous means and a transparent cover, wherein the cover is arranged in a light exit region of the luminaire and comprises a trough-shaped region. Furthermore, the luminaire has a flexible optical element, which is arranged resting on the cover within the trough-shaped region.
  • the optical element is flexible, it can adapt to the surface of the cover in the trough-shaped region; In addition, can easily and quickly its positioning or orientation relative to the bulb to be changed. As a result, the effect of the optical element and thus the radiation behavior of the luminaire can generally be changed. For example, the optical element can be turned over so that it rests with another side on the cover.
  • the optical element is a film.
  • a change in the arrangement or orientation of the optical element is particularly simple.
  • this makes the optical element so that it has very little mass; This too is advantageous in terms of a particularly simple handling.
  • the cover has at least two, preferably at least three different partial regions, wherein the trough-shaped region is one of the partial regions and the optical element is arranged only on the trough-shaped region.
  • the trough-shaped region is the partial region closest to the luminous means.
  • the trough-shaped region is advantageously delimited from the other partial region or from the other partial regions by at least one web which extends upwards from the cover.
  • the web allows a lateral position limitation for the optical element to be achieved.
  • the optical element can thus be particularly easily and quickly brought into a certain predetermined position.
  • the optical element has a first structure on a first side, wherein the first structure has parallel, elongate cylindrical lenses. This makes it possible to achieve that the light source through the cover is not recognizable or at least not clearly visible. The image or outlines of the light source can thus be resolved.
  • the illuminant is advantageously elongate and the optical element is arranged such that the cylindrical lenses of the first structure are aligned parallel to the illuminant.
  • the optical element has no structure on a second side opposite the first side, in particular no structure for selectively influencing light.
  • the optical element has no structure on a second side opposite the first side, in particular no structure for selectively influencing light.
  • the optical element also advantageously has a second structure, which differs from the first structure, on a second side opposite the first side. This also makes it possible to change the radiation properties of the luminaire by simply reversing the optical element.
  • the second structure is advantageously formed by a print.
  • the second structure is linear, wherein the corresponding lines are aligned transversely, preferably at right angles to the elongated cylindrical lenses.
  • the first structure has said parallel cylindrical elongated lenses, simply by turning the optical element, it can be achieved that light is radiated in a larger or smaller solid angle range; in the case of a ceiling light, for example, this can be a more intense or weaker lighting side walls of a room to be illuminated can be effected.
  • Fig. 1 a sketch of a cross section through a lamp according to the invention is shown.
  • the luminaire has a luminous means 2.
  • the light-emitting means 2 may be elongated, it may be, for example, at least one elongate fluorescent tube.
  • the light bulb 2 may - with reference to Fig. 1 - extend perpendicular to the plane.
  • the lamp has a transparent cover 4.
  • the cover 4 is advantageously arranged in a light exit region of the luminaire and accordingly so transparent that light originating from the luminous means 2 can leave the luminaire through the cover 4.
  • the luminaire has a luminaire housing 6 in which the luminous means 2 is arranged, wherein the luminaire housing 6 forms an opening which is provided for the exit of light originating from the luminous means 2, so that the opening is the light exit area the light forms.
  • the luminaire housing 6 can be approximately box-shaped or cuboidal.
  • the cover 4 comprises a trough-shaped region 22.
  • the trough-shaped region 22 can be formed, in particular, by a slight protrusion of the cover 4.
  • the protrusion may in particular have a direction in which a radiation of the lamp is provided, in the case of a ceiling light so for example down.
  • the luminaire has a flexible optical element 8, which is arranged resting on the cover 4, namely within the trough-shaped region 22.
  • the optical element 8 serves to selectively influence the light originating from the luminous means 2.
  • the optical element 8 may in particular have a structure in the form of a structured surface.
  • the optical element 8 is preferably only on the cover 4. It is advantageous if the optical element 8 is also not connected to the cover 4 or any other component of the lamp fixing. It can therefore be provided, in particular, that the cover 4 is arranged to extend horizontally, at least to a first approximation.
  • the luminaire may be a ceiling luminaire, in particular a recessed ceiling luminaire, with the light exit area and therefore also the cover 4 being accordingly aligned horizontally.
  • the orientation or positioning of the optical element 8 relative to the light source 2 can be changed in a simple manner, so that thereby the radiation behavior of the lamp is changed quickly.
  • the optical element 8 is a film. In this way, it can easily adapt to the surface of the cover 4. In particular, the optical element 8 can fit within the trough-shaped region 22 to the surface of the cover 4 fitting, when it is placed on the cover 4 accordingly.
  • the flexibility of the optical element 8 is particularly advantageous when changing the orientation or positioning of the optical element 8 relative to the luminous means 2.
  • the cover 4 may have at least two, preferably at least three different partial regions 22, 24, 26, wherein the trough-shaped region 22 is one of the partial regions.
  • the trough-shaped portion 22 may be in particular a central portion 22 adjacent to each of which a lateral portion 24, 26 on both sides, so that the cover 4 a total of three portions 22, 24, 26 has. It can further be provided that the optical element 8 rests only on the central portion 22. Since the luminous means 2 is arranged centrally in the example shown, the optical element 8 is thus arranged in that of the partial regions which is closest to the luminous means 8. This makes it possible to influence the light originating from the luminous means 2 in a particularly effective manner achieve through the optical element 8. In particular, it can be provided in the case of a ceiling light, that the optical element 8 may be arranged only in a partial region 22 of the cover 4, which includes the vertical projection of the light-emitting means 2.
  • microprisms or other elements for influencing the light can be arranged on the lateral subareas 24, 26.
  • the portion 22 on or in which the optical element 8 is arranged may be delimited from the other portion 24 or from the other portions 24, 26 by at least one web 28, which extends from the cover 4 upwards.
  • the web 28 can be a lateral position limit for the optical element 8 achieve.
  • the web 28 may, for example, extend vertically. Its height can be, for example, a maximum of 10% of the extension of the lamp housing 6 in a direction perpendicular to the light exit area.
  • the optical element 8 on a first side 10 may have a first structure, in particular in the form of a structured surface.
  • the optical element 8 can either be arranged lying on the cover 4 in such a way that it rests with the first side 10 or so that it rests with another side, whereby by correspondingly turning over the optical element 8 in general very quickly and easily a corresponding change in the radiation behavior of the lamp can be caused.
  • the structured surface of the first side 10 may have, for example, parallel, elongated cylindrical lenses. Such a structure is in itself from the Scriptures WO 2008/067862 A1 known. For the formation of the optical element 8 reference is made in this respect to this document.
  • Such a structure is particularly advantageous if the luminous means 2 is elongated and the optical element 8 is arranged such that the cylindrical lenses are aligned parallel to the luminous means 2.
  • the bulb 2 and the cylindrical lenses respectively are arranged perpendicular to the plane of the drawing. In this way, it can be achieved that the light originating from the luminous means 2 is scattered or distributed by the optical element 8 in such a way that the illuminant 2 is no longer or at least hardly recognizable from the outside when the luminaire is viewed from the outside.
  • the optical element 8 has no structure on a second side 12 lying opposite the first side 10, in particular no structure which is provided for purposefully influencing the light originating from the luminous means 2.
  • the optical element on the second side 12 has a second structure which differs from the first structure.
  • the second structure may comprise a print or be formed by a printing.
  • the appearance of a perforated plate can be simulated.
  • the second structure may be linear with the corresponding lines aligned transversely, preferably at right angles to the elongate cylindrical lenses of the first structure.
  • a state is shown in which the optical element 8 - starting from the in Fig. 2 sketched state - is reversed, in such a way that it rests with its second side 12 on the cover 4.
  • the cylindrical lens structure is thus in this orientation of the optical element 8 on that side of the optical element 8, which faces the bulb 2.
  • This orientation of the optical element 8 results - in comparison to the in Fig. 2 shown situation - a broader radiation characteristic. The average scattering angle is therefore larger.
  • the luminaire according to the invention enables a particularly simple and rapid change of the radiation characteristics of the luminaire. It can be effectively achieved that the image of the bulb through the cover is virtually no longer visible.
  • the lamp is particularly well suited as a ceiling light.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The lamp has a transparent cover (4) in a light-emitting area of the lamp, and a trough-shaped region (22). A flexible optical element (8) i.e. foil, is arranged on the cover inside the trough-shaped region. The cover has three different partial areas, and the trough-shaped region is one partial region that is located next to a light source (2). The trough-shaped region is limited by a bar (28) from other partial regions (24, 26), where the bar extends upward from the cover. The optical element has a structure on a side, where the structure has a parallely arranged cylindrical lens.

Description

Die Erfindung betrifft eine Leuchte mit einem Leuchtmittel und einer transparenten Abdeckung, die in einem Lichtaustrittsbereich der Leuchte angeordnet ist und einen trogförmigen Bereich umfasst.The invention relates to a luminaire with a luminous means and a transparent cover which is arranged in a light exit region of the luminaire and comprises a trough-shaped region.

Bei einer derartigen Leuchte besteht in der Regel der Wunsch, das Erscheinungsbild der Leuchte so zu gestalten, dass das Leuchtmittel durch die Abdeckung hindurch als solches nicht erkennbar ist oder zumindest nicht deutlich erkennbar ist. Aus der WO 2008/067862 A1 ist hierzu bekannt, die Abdeckung mit einer Lichtbeeinflussungsplatte zu versehen, die auf einer Seite eine wellenartige Struktur bildende Wellenzüge und auf der anderen Seite parallel verlaufende lichtdämpfende oder lichtundurchlässige Streifen aufweist.In such a lamp is usually the desire to make the appearance of the lamp so that the lamp through the cover as such is not recognizable or at least not clearly visible. From the WO 2008/067862 A1 For this purpose, it is known to provide the cover with a light-influencing plate having on one side of a wave-like structure forming wave trains and on the other side parallel extending light-damping or opaque strips.

Der Erfindung liegt die Aufgabe zu Grunde, eine entsprechende Leuchte anzugeben, bei der sich die Abstrahleigenschaften auf einfache Weise und schnell modifizieren lassen.The invention is based on the object to provide a corresponding lamp in which the radiation properties can be easily and quickly modified.

Diese Aufgabe wird gemäß der Erfindung mit der in dem unabhängigen Anspruch genannten Leuchte erzielt. Besondere Ausführungsformen der Erfindung sind in den abhängigen Ansprüchen angegeben.This object is achieved according to the invention with the lamp mentioned in the independent claim. Particular embodiments of the invention are indicated in the dependent claims.

Gemäß der Erfindung ist eine Leuchte vorgesehen, die ein Leuchtmittel und eine transparente Abdeckung aufweist, wobei die Abdeckung in einem Lichtaustrittsbereich der Leuchte angeordnet ist und einen trogförmigen Bereich umfasst. Weiterhin weist die Leuchte ein biegsames optisches Element auf, das innerhalb des trogförmigen Bereichs auf der Abdeckung aufliegend angeordnet ist.According to the invention, a luminaire is provided which has a luminous means and a transparent cover, wherein the cover is arranged in a light exit region of the luminaire and comprises a trough-shaped region. Furthermore, the luminaire has a flexible optical element, which is arranged resting on the cover within the trough-shaped region.

Dadurch, dass das optische Element biegsam ist, kann es sich der Oberfläche der Abdeckung in dem trogförmigen Bereich anpassen; außerdem kann auf einfache Weise und schnell seine Positionierung bzw. Orientierung gegenüber dem Leuchtmittel verändert werden. Hierdurch lässt sich im Allgemeinen die Wirkung des optischen Elements und somit das Abstrahlverhalten der Leuchte verändern. Beispielsweise kann das optische Element hierfür gewendet werden, so dass es mit einer anderen Seite auf der Abdeckung aufliegt.By virtue of the fact that the optical element is flexible, it can adapt to the surface of the cover in the trough-shaped region; In addition, can easily and quickly its positioning or orientation relative to the bulb to be changed. As a result, the effect of the optical element and thus the radiation behavior of the luminaire can generally be changed. For example, the optical element can be turned over so that it rests with another side on the cover.

Vorteilhaft ist das optische Element eine Folie. Hierdurch ist eine Veränderung der Anordnung bzw. Orientierung des optischen Elements besonders einfach. Außerdem lässt sich hierdurch das optische Element so gestalten, dass es besonders wenig Masse hat; auch dies ist vorteilhaft hinsichtlich einer besonders einfachen Handhabung.Advantageously, the optical element is a film. As a result, a change in the arrangement or orientation of the optical element is particularly simple. In addition, this makes the optical element so that it has very little mass; This too is advantageous in terms of a particularly simple handling.

Vorteilhaft weist die Abdeckung wenigstens zwei, vorzugsweise wenigstens drei unterschiedliche Teilbereiche auf, wobei der trogförmige Bereich einer der Teilbereiche ist und das optische Element lediglich auf dem trogförmigen Bereich angeordnet ist. Eine besonders wirkungsvolle Modifizierung der Abstrahleigenschaften der Leuchte lässt sich in diesem Fall erzielen, wenn der trogförmige Bereich der dem Leuchtmittel am nächsten gelegene Teilbereich ist.Advantageously, the cover has at least two, preferably at least three different partial regions, wherein the trough-shaped region is one of the partial regions and the optical element is arranged only on the trough-shaped region. In this case, a particularly effective modification of the emission properties of the luminaire can be achieved if the trough-shaped region is the partial region closest to the luminous means.

Vorteilhaft ist dabei weiterhin der trogförmige Bereich von dem anderen Teilbereich bzw. von den anderen Teilbereichen durch wenigstens einen Steg abgegrenzt, der sich von der Abdeckung aus nach oben erstreckt. Durch den Steg lässt sich eine seitliche Lagebegrenzung für das optische Element erzielen. Das optische Element kann somit besonders einfach und schnell in eine bestimmte vorab festgelegte Position gebracht werden.Furthermore, the trough-shaped region is advantageously delimited from the other partial region or from the other partial regions by at least one web which extends upwards from the cover. The web allows a lateral position limitation for the optical element to be achieved. The optical element can thus be particularly easily and quickly brought into a certain predetermined position.

Vorteilhaft weist das optische Element auf einer ersten Seite eine erste Struktur auf, wobei die erste Struktur parallel angeordnete, längliche Zylinderlinsen aufweist. Hierdurch lässt sich erzielen, dass das Leuchtmittel durch die Abdeckung hindurch nicht erkennbar oder zumindest nicht deutlich erkennbar ist. Das Bild bzw. die Umrisse des Leuchtmittels können somit aufgelöst werden.Advantageously, the optical element has a first structure on a first side, wherein the first structure has parallel, elongate cylindrical lenses. This makes it possible to achieve that the light source through the cover is not recognizable or at least not clearly visible. The image or outlines of the light source can thus be resolved.

Vorteilhaft ist in diesem Fall das Leuchtmittel länglich und das optische Element derart angeordnet, dass die Zylinderlinsen der ersten Struktur parallel zu dem Leuchtmittel ausgerichtet sind. Hierdurch lässt sich besonders effektiv erzielen, dass das von dem Leuchtmittel stammende Licht durch das optische Element derart gestreut bzw. verteilt wird, dass das Leuchtmittel bei Betrachtung der Leuchte nicht mehr oder fast nicht mehr zu erkennen ist.In this case, the illuminant is advantageously elongate and the optical element is arranged such that the cylindrical lenses of the first structure are aligned parallel to the illuminant. As a result, it can be achieved particularly effectively that the light originating from the light source is scattered by the optical element in this way or is distributed that the light source when viewing the lamp is no longer or almost no longer visible.

Vorteilhaft weist das optische Element auf einer, der ersten Seite gegenüber liegenden zweiten Seite keine Struktur auf, insbesondere keine Struktur zur gezielten Beeinflussung von Licht. Hierdurch lassen sich durch einfaches Umwenden des optischen Elements von der ersten Seite auf die zweite Seite oder anders herum die Abstrahleigenschaften der Leuchte verändern.Advantageously, the optical element has no structure on a second side opposite the first side, in particular no structure for selectively influencing light. As a result, by simply turning the optical element from the first side to the second side or vice versa, the emission characteristics of the luminaire can be changed.

Alternativ hierzu weist das optische Element ebenfalls vorteilhaft auf einer, der ersten Seite gegenüber liegenden zweiten Seite eine zweite Struktur auf, die sich von der ersten Struktur unterscheidet. Auch hierdurch lassen sich die Abstrahleigenschaften der Leuchte durch einfaches Umwenden des optischen Elements verändern. Vorteilhaft ist dabei die zweite Struktur durch eine Bedruckung gebildet.Alternatively, the optical element also advantageously has a second structure, which differs from the first structure, on a second side opposite the first side. This also makes it possible to change the radiation properties of the luminaire by simply reversing the optical element. The second structure is advantageously formed by a print.

Weiterhin vorteilhaft ist die zweite Struktur linienförmig, wobei die entsprechenden Linien quer, vorzugsweise rechtwinklig zu den länglichen Zylinderlinsen ausgerichtet sind. Durch eine solche zweite Struktur auf der zweiten Seite des optischen Elements kann beispielsweise das Erscheinungsbild eines Lochblechs simuliert werden.Further advantageously, the second structure is linear, wherein the corresponding lines are aligned transversely, preferably at right angles to the elongated cylindrical lenses. By such a second structure on the second side of the optical element, for example, the appearance of a perforated plate can be simulated.

Wenn die erste Struktur die genannten parallel angeordneten, länglichen Zylinderlinsen aufweist, lässt sich durch einfaches Umwenden des optischen Elements erzielen, dass Licht in einen größeren oder kleineren Raumwinkelbereich abgestrahlt wird; im Fall einer Deckenleuchte beispielsweise kann hierdurch eine intensivere oder schwächere Beleuchtung seitlicher Wände eines zu beleuchtenden Raums bewirkt werden.If the first structure has said parallel cylindrical elongated lenses, simply by turning the optical element, it can be achieved that light is radiated in a larger or smaller solid angle range; in the case of a ceiling light, for example, this can be a more intense or weaker lighting side walls of a room to be illuminated can be effected.

Die Erfindung wird im Folgenden anhand eines Ausführungsbeispiels und mit Bezug auf die Zeichnungen näher erläutert. Es zeigen:

Fig. 1
eine Skizze zu einem Querschnitt durch eine erfindungsgemäße Leuchte,
Fig. 2
eine Skizze zu dem in Fig. 1 markierten Ausschnitt und
Fig. 3
eine der Fig. 2 entsprechende Skizze, wobei das optische Element umgewendet ist.
The invention is explained in more detail below with reference to an embodiment and with reference to the drawings. Show it:
Fig. 1
a sketch of a cross section through a lamp according to the invention,
Fig. 2
a sketch to the in Fig. 1 marked section and
Fig. 3
one of the Fig. 2 corresponding sketch, wherein the optical element is reversed.

In Fig. 1 ist eine Skizze eines Querschnitts durch eine erfindungsgemäße Leuchte gezeigt. Die Leuchte weist ein Leuchtmittel 2 auf. Das Leuchtmittel 2 kann länglich sein, es kann sich beispielsweise um wenigstens eine längliche Leuchtstoffröhre handeln. Das Leuchtmittel 2 kann sich - mit Bezug auf Fig. 1 - senkrecht zur Zeichenebene erstrecken.In Fig. 1 a sketch of a cross section through a lamp according to the invention is shown. The luminaire has a luminous means 2. The light-emitting means 2 may be elongated, it may be, for example, at least one elongate fluorescent tube. The light bulb 2 may - with reference to Fig. 1 - extend perpendicular to the plane.

Weiterhin weist die Leuchte eine transparente Abdeckung 4 auf. Die Abdeckung 4 ist vorteilhaft in einem Lichtaustrittsbereich der Leuchte angeordnet und dementsprechend so transparent, dass von dem Leuchtmittel 2 stammendes Licht durch die Abdeckung 4 hindurch die Leuchte verlassen kann. Beispielsweise kann vorgesehen sein, dass die Leuchte ein Leuchtengehäuse 6 aufweist, in dem das Leuchtmittel 2 angeordnet ist, wobei das Leuchtengehäuse 6 eine Öffnung bildet, die zum Austritt von Licht vorgesehen ist, das von dem Leuchtmittel 2 stammt, so dass die Öffnung den Lichtaustrittsbereich der Leuchte bildet. Das Leuchtengehäuse 6 kann insgesamt etwa kasten- oder quaderförmig sein.Furthermore, the lamp has a transparent cover 4. The cover 4 is advantageously arranged in a light exit region of the luminaire and accordingly so transparent that light originating from the luminous means 2 can leave the luminaire through the cover 4. For example, it may be provided that the luminaire has a luminaire housing 6 in which the luminous means 2 is arranged, wherein the luminaire housing 6 forms an opening which is provided for the exit of light originating from the luminous means 2, so that the opening is the light exit area the light forms. Overall, the luminaire housing 6 can be approximately box-shaped or cuboidal.

Die Abdeckung 4 umfasst einen trogförmigen Bereich 22. Der trogförmige Bereich 22 kann insbesondere durch eine leichte Vorwölbung der Abdeckung 4 gebildet sein. Die Vorwölbung kann dabei insbesondere in eine Richtung weisen, in der eine Abstrahlung der Leuchte vorgesehen ist, im Fall einer Deckenleuchte also beispielsweise nach unten.The cover 4 comprises a trough-shaped region 22. The trough-shaped region 22 can be formed, in particular, by a slight protrusion of the cover 4. The protrusion may in particular have a direction in which a radiation of the lamp is provided, in the case of a ceiling light so for example down.

Weiterhin weist die Leuchte ein biegsames optisches Element 8 auf, das auf der Abdeckung 4, und zwar innerhalb des trogförmigen Bereichs 22 aufliegend angeordnet ist. Das optische Element 8 dient der gezielten Beeinflussung des von dem Leuchtmittel 2 stammenden Lichts. Das optische Element 8 kann hierfür insbesondere eine Struktur in Form einer strukturierten Oberfläche aufweisen.Furthermore, the luminaire has a flexible optical element 8, which is arranged resting on the cover 4, namely within the trough-shaped region 22. The optical element 8 serves to selectively influence the light originating from the luminous means 2. For this purpose, the optical element 8 may in particular have a structure in the form of a structured surface.

Das optische Element 8 liegt vorzugsweise lediglich auf der Abdeckung 4 auf. Es ist vorteilhaft, wenn das optische Element 8 darüber hinaus nicht mit der Abdeckung 4 oder einem sonstigen Bauteil der Leuchte fixierend verbunden ist. Daher kann insbesondere vorgesehen sein, dass die Abdeckung 4 insgesamt zumindest in erster Näherung horizontal verlaufend angeordnet ist. Beispielsweise kann es sich bei der Leuchte um eine Deckenleuchte, insbesondere um eine Deckeneinbauleuchte handeln, wobei der Lichtaustrittsbereich und somit auch die Abdeckung 4 demgemäß horizontal ausgerichtet sind.The optical element 8 is preferably only on the cover 4. It is advantageous if the optical element 8 is also not connected to the cover 4 or any other component of the lamp fixing. It can therefore be provided, in particular, that the cover 4 is arranged to extend horizontally, at least to a first approximation. For example, the luminaire may be a ceiling luminaire, in particular a recessed ceiling luminaire, with the light exit area and therefore also the cover 4 being accordingly aligned horizontally.

Dadurch, dass das optische Element 8 lediglich auf der Abdeckung 4 aufliegt, kann auf einfache Weise die Orientierung bzw. Positionierung des optischen Elements 8 gegenüber dem Leuchtmittel 2 verändert werden, so dass dadurch das Abstrahlverhalten der Leuchte schnell verändert wird.The fact that the optical element 8 rests only on the cover 4, the orientation or positioning of the optical element 8 relative to the light source 2 can be changed in a simple manner, so that thereby the radiation behavior of the lamp is changed quickly.

Vorteilhaft ist das optische Element 8 eine Folie. Auf diese Weise kann es sich sehr leicht der Oberfläche der Abdeckung 4 anpassen. Insbesondere kann sich das optische Element 8 innerhalb des trogförmigen Bereichs 22 an die Oberfläche der Abdeckung 4 anliegend einfügen, wenn es entsprechend auf die Abdeckung 4 gelegt wird. Die Biegsamkeit des optischen Elements 8 ist insbesondere bei Veränderung der Orientierung bzw. Positionierung des optischen Elements 8 gegenüber dem Leuchtmittel 2 von Vorteil.Advantageously, the optical element 8 is a film. In this way, it can easily adapt to the surface of the cover 4. In particular, the optical element 8 can fit within the trough-shaped region 22 to the surface of the cover 4 fitting, when it is placed on the cover 4 accordingly. The flexibility of the optical element 8 is particularly advantageous when changing the orientation or positioning of the optical element 8 relative to the luminous means 2.

Wie aus Fig. 1 hervorgeht, kann die Abdeckung 4 wenigstens zwei, vorzugsweise wenigstens drei unterschiedliche Teilbereiche 22, 24, 26 aufweisen, wobei der trogförmige Bereich 22 einer der Teilbereiche ist.How out Fig. 1 As can be seen, the cover 4 may have at least two, preferably at least three different partial regions 22, 24, 26, wherein the trough-shaped region 22 is one of the partial regions.

Wie in Fig. 1 angedeutet, kann der trogförmige Bereich 22 insbesondere ein mittlerer Teilbereich 22 sein, an den zu beiden Seiten je ein seitlicher Teilbereich 24, 26 angrenzt, so dass die Abdeckung 4 insgesamt drei Teilbereiche 22, 24, 26 aufweist. Dabei kann weiterhin vorgesehen sein, dass das optische Element 8 lediglich auf dem mittleren Teilbereich 22 aufliegt. Da das Leuchtmittel 2 bei dem gezeigten Beispiel mittig angeordnet ist, ist das optische Element 8 somit in demjenigen der Teilbereiche angeordnet ist, der dem Leuchtmittel 8 am nächsten ist. Hierdurch lässt sich eine besonders effektive Beeinflussung des von dem Leuchtmittel 2 stammenden Lichts durch das optische Element 8 erzielen. Insbesondere kann im Fall einer Deckenleuchte vorgesehen sein, dass das optische Element 8 lediglich in einem Teilbereich 22 der Abdeckung 4 angeordnet sein, der die senkrechte Projektion des Leuchtmittels 2 umfasst.As in Fig. 1 indicated, the trough-shaped portion 22 may be in particular a central portion 22 adjacent to each of which a lateral portion 24, 26 on both sides, so that the cover 4 a total of three portions 22, 24, 26 has. It can further be provided that the optical element 8 rests only on the central portion 22. Since the luminous means 2 is arranged centrally in the example shown, the optical element 8 is thus arranged in that of the partial regions which is closest to the luminous means 8. This makes it possible to influence the light originating from the luminous means 2 in a particularly effective manner achieve through the optical element 8. In particular, it can be provided in the case of a ceiling light, that the optical element 8 may be arranged only in a partial region 22 of the cover 4, which includes the vertical projection of the light-emitting means 2.

An den seitlichen Teilbereichen 24, 26 können beispielsweise Mikroprismen oder anderweitige Elemente zur Lichtbeeinflussung angeordnet sein.For example, microprisms or other elements for influencing the light can be arranged on the lateral subareas 24, 26.

Derjenige Teilbereich 22, auf bzw. in dem das optische Element 8 angeordnet ist, kann von dem anderen Teilbereich 24 bzw. von den anderen Teilbereichen 24, 26 durch wenigstens einen Steg 28 abgegrenzt sein, der sich von der Abdeckung 4 aus nach oben erstreckt. Durch den Steg 28 lässt sich eine seitliche Lagebegrenzung für das optische Element 8 erzielen. Der Steg 28 kann sich beispielsweise vertikal erstrecken. Seine Höhe kann beispielsweise maximal 10% der Erstreckung des Leuchtengehäuses 6 in einer Richtung senkrecht zu dem Lichtaustrittsbereich betragen.The portion 22 on or in which the optical element 8 is arranged may be delimited from the other portion 24 or from the other portions 24, 26 by at least one web 28, which extends from the cover 4 upwards. By the web 28 can be a lateral position limit for the optical element 8 achieve. The web 28 may, for example, extend vertically. Its height can be, for example, a maximum of 10% of the extension of the lamp housing 6 in a direction perpendicular to the light exit area.

Wie in Fig. 2 angedeutet, die den in Fig. 1 markierten Ausschnitt näher zeigt, kann das optische Element 8 auf einer ersten Seite 10 eine erste Struktur, insbesondere in Form einer strukturierten Oberfläche aufweisen. Hierdurch lässt sich erzielen, dass das optische Element 8 entweder so auf der Abdeckung 4 aufliegend angeordnet werden kann, dass es mit der ersten Seite 10 aufliegt oder so, dass es mit einer anderen Seite aufliegt, wobei durch entsprechendes Umwenden des optischen Elements 8 im Allgemeinen sehr schnell und einfach eine entsprechende Änderung des Abstrahlverhaltens der Leuchte hervorgerufen werden kann.As in Fig. 2 indicated that the in Fig. 1 1 shows a marked section, the optical element 8 on a first side 10 may have a first structure, in particular in the form of a structured surface. In this way, it can be achieved that the optical element 8 can either be arranged lying on the cover 4 in such a way that it rests with the first side 10 or so that it rests with another side, whereby by correspondingly turning over the optical element 8 in general very quickly and easily a corresponding change in the radiation behavior of the lamp can be caused.

Die strukturierte Oberfläche der ersten Seite 10 kann beispielsweise parallel angeordnete, längliche Zylinderlinsen aufweisen. Eine derartige Struktur ist an sich aus der Schrift WO 2008/067862 A1 bekannt. Zur Ausbildung des optischen Elements 8 wird insoweit auch auf diese Schrift verwiesen.The structured surface of the first side 10 may have, for example, parallel, elongated cylindrical lenses. Such a structure is in itself from the Scriptures WO 2008/067862 A1 known. For the formation of the optical element 8 reference is made in this respect to this document.

Eine derartige Struktur ist besonders vorteilhaft, wenn das Leuchtmittel 2 länglich ist und das optische Element 8 derart angeordnet ist, dass die Zylinderlinsen parallel zu dem Leuchtmittel 2 ausgerichtet sind. Mit Bezug auf die Darstellungen der Figuren 1 und 2 kann vorgesehen sein, dass das Leuchtmittel 2 und die Zylinderlinsen jeweils senkrecht zur Zeichenebene angeordnet sind. Auf diese Weise kann erzielt werden, dass das von dem Leuchtmittel 2 stammende Licht durch das optische Element 8 derart gestreut bzw. verteilt wird, das das Leuchtmittel 2 bei Betrachtung der Leuchte von außen nicht mehr oder zumindest kaum mehr erkennbar ist. Dieser Effekt ist besonders ausgeprägt, wenn das optische Element 8 derart auf der Abdeckung 4 aufliegt, dass die erste Seite 10 mit der ersten Struktur, also mit den Zylinderlinsen in eine Richtung weist, die dem Leuchtmittel 2 abgewandt ist - mit Bezug auf Fig. 2 also nach "unten".Such a structure is particularly advantageous if the luminous means 2 is elongated and the optical element 8 is arranged such that the cylindrical lenses are aligned parallel to the luminous means 2. With reference to the representations of FIGS. 1 and 2 can be provided that the bulb 2 and the cylindrical lenses respectively are arranged perpendicular to the plane of the drawing. In this way, it can be achieved that the light originating from the luminous means 2 is scattered or distributed by the optical element 8 in such a way that the illuminant 2 is no longer or at least hardly recognizable from the outside when the luminaire is viewed from the outside. This effect is particularly pronounced when the optical element 8 rests on the cover 4 in such a way that the first side 10 with the first structure, that is to say with the cylindrical lenses, points in a direction which faces away from the luminous means 2 with reference to FIG Fig. 2 So after "down".

Weiterhin kann vorgesehen sein, dass das optische Element 8 auf einer, der ersten Seite 10 gegenüber liegenden, zweiten Seite 12 keine Struktur aufweist, insbesondere keine Struktur, die zur gezielten Beeinflussung des von dem Leuchtmittel 2 stammenden Lichts vorgesehen ist.Furthermore, it can be provided that the optical element 8 has no structure on a second side 12 lying opposite the first side 10, in particular no structure which is provided for purposefully influencing the light originating from the luminous means 2.

Es kann jedoch auch vorgesehen sein, dass das optische Element auf der zweiten Seite 12 eine zweite Struktur aufweist, die sich von der ersten Struktur unterscheidet. Beispielsweise kann die zweite Struktur eine Bedruckung umfassen oder durch eine Bedruckung gebildet sein.However, it can also be provided that the optical element on the second side 12 has a second structure which differs from the first structure. For example, the second structure may comprise a print or be formed by a printing.

Durch die zweite Struktur kann beispielsweise das Erscheinungsbild eines Lochblechs simuliert werden.By the second structure, for example, the appearance of a perforated plate can be simulated.

Die zweite Struktur kann linienförmig sein, wobei die entsprechenden Linien quer, vorzugsweise rechtwinklig zu den länglichen Zylinderlinsen der ersten Struktur ausgerichtet sind.The second structure may be linear with the corresponding lines aligned transversely, preferably at right angles to the elongate cylindrical lenses of the first structure.

In Fig. 3 ist ein Zustand gezeigt, in dem das optische Element 8 - ausgehend von dem in Fig. 2 skizzierten Zustand - umgewendet ist, und zwar derart, dass es mit seiner zweiten Seite 12 auf der Abdeckung 4 aufliegt. Die Zylinderlinsen-Struktur befindet sich bei dieser Orientierung des optischen Elements 8 also auf derjenigen Seite des optischen Elements 8, die zum Leuchtmittel 2 hin weist. Bei dieser Orientierung des optischen Elements 8 ergibt sich - im Vergleich zu der in Fig. 2 gezeigten Situation - eine breitere Abstrahlcharakteristik. Der durchschnittliche Streuwinkel ist also größer.In Fig. 3 a state is shown in which the optical element 8 - starting from the in Fig. 2 sketched state - is reversed, in such a way that it rests with its second side 12 on the cover 4. The cylindrical lens structure is thus in this orientation of the optical element 8 on that side of the optical element 8, which faces the bulb 2. In this orientation of the optical element 8 results - in comparison to the in Fig. 2 shown situation - a broader radiation characteristic. The average scattering angle is therefore larger.

Im Fall einer horizontalen Ausrichtung der Abdeckung 4, also beispielsweise bei einer Deckenleuchte, wird dementsprechend bei der in Fig. 3 gezeigten Situation mehr Licht zu den Seiten hin abgegeben, so dass beispielsweise Wände eines zu beleuchtenden Raums verstärkt aufgehellt werden können. Allerdings ist bei dieser Orientierung des optischen Elements 8 die Auflösung des Bilds des Leuchtmittels 2 nicht so stark wie bei der zuvor genannten Orientierung, bei der die Zylinderlinsen an der Unterseite des optischen Elements 8 angeordnet sind.In the case of a horizontal orientation of the cover 4, so for example in a ceiling light, is accordingly in the in Fig. 3 shown situation more light emitted to the sides, so that, for example, walls of a room to be illuminated can be brightened more. However, in this orientation of the optical element 8, the resolution of the image of the luminous means 2 is not as strong as in the aforementioned orientation, in which the cylindrical lenses are arranged on the underside of the optical element 8.

Die erfindungsgemäße Leuchte ermöglicht ein besonders einfaches und schnelles Verändern der Abstrahleigenschaften der Leuchte. Dabei lässt sich wirkungsvoll erzielen, dass das Bild des Leuchtmittels durch die Abdeckung hindurch praktisch nicht mehr zu erkennen ist. Die Leuchte eignet sich besonders gut als Deckenleuchte.The luminaire according to the invention enables a particularly simple and rapid change of the radiation characteristics of the luminaire. It can be effectively achieved that the image of the bulb through the cover is virtually no longer visible. The lamp is particularly well suited as a ceiling light.

Claims (11)

Leuchte, aufweisend - ein Leuchtmittel (2) und - eine transparente Abdeckung (4), wobei die Abdeckung (4) in einem Lichtaustrittsbereich der Leuchte angeordnet ist und einen trogförmigen Bereich umfasst,
gekennzeichnet durch - ein biegsames optisches Element (8), das innerhalb des trogförmigen Bereichs (22) auf der Abdeckung (4) aufliegend angeordnet ist. Light, comprising - A light source (2) and a transparent cover (4), wherein the cover (4) is arranged in a light exit region of the luminaire and comprises a trough-shaped region,
marked by - A flexible optical element (8) which is disposed within the trough-shaped region (22) resting on the cover (4). Leuchte nach Anspruch 1,
bei der das optische Element (8) eine Folie ist.Luminaire according to claim 1,
wherein the optical element (8) is a foil. Leuchte nach Anspruch 1 oder 2,
bei der die Abdeckung (4) wenigstens zwei, vorzugsweise wenigstens drei unterschiedliche Teilbereiche (22, 24, 26) aufweist, wobei der trogförmige Bereich (22) einer der Teilbereiche (22, 24, 26) ist und das optische Element (8) lediglich auf dem trogförmigen Bereich (22) angeordnet ist.Luminaire according to claim 1 or 2,
in which the cover (4) has at least two, preferably at least three different partial regions (22, 24, 26), the trough-shaped region (22) being one of the partial regions (22, 24, 26) and the optical element (8) only is arranged on the trough-shaped region (22). Leuchte nach Anspruch 3,
bei der der trogförmige Bereich (22) der dem Leuchtmittel (2) am nächsten gelegene Teilbereich ist.Luminaire according to claim 3,
in which the trough-shaped region (22) is the partial region closest to the luminous means (2). Leuchte nach Anspruch 3 oder 4,
bei der der trogförmige Bereich (22) von dem anderen Teilbereich (24) bzw. von den anderen Teilbereichen (24, 26) durch wenigstens einen Steg (28) abgegrenzt ist, der sich von der Abdeckung (4) aus nach oben erstreckt.Luminaire according to claim 3 or 4,
in which the trough-shaped region (22) is delimited from the other partial region (24) or from the other partial regions (24, 26) by at least one web (28) which extends upwards from the cover (4). Leuchte nach einem der vorhergehenden Ansprüche,
bei der das optische Element (8) auf einer ersten Seite (10) eine erste Struktur aufweist,
wobei die erste Struktur parallel angeordnete, längliche Zylinderlinsen aufweist.Luminaire according to one of the preceding claims,
wherein the optical element (8) has a first structure on a first side (10),
wherein the first structure comprises parallel, elongated cylindrical lenses. Leuchte nach Anspruch 6,
bei der das Leuchtmittel (2) länglich ist und das optische Element (8) derart angeordnet ist, dass die Zylinderlinsen der ersten Struktur parallel zu dem Leuchtmittel (2) ausgerichtet sind.Luminaire according to claim 6,
in which the luminous means (2) is elongate and the optical element (8) is arranged such that the cylindrical lenses of the first structure are aligned parallel to the luminous means (2). Leuchte nach Anspruch 6 oder 7,
bei der das optische Element (8) auf einer, der ersten Seite (10) gegenüber liegenden, zweiten Seite (12) keine Struktur aufweist.Luminaire according to claim 6 or 7,
in which the optical element (8) has no structure on a second side (12) lying opposite the first side (10). Leuchte nach Anspruch 6 oder 7,
bei der das optische Element (8) auf einer, der ersten Seite (10) gegenüber liegenden, zweiten Seite (12) eine zweite Struktur aufweist, die sich von der ersten Struktur unterscheidet.Luminaire according to claim 6 or 7,
in which the optical element (8) has, on a second side (12) opposite the first side (10), a second structure which differs from the first structure. Leuchte nach Anspruch 9,
bei der die zweite Struktur durch eine Bedruckung gebildet ist.Luminaire according to claim 9,
in which the second structure is formed by a printing. Leuchte nach Anspruch 9 oder 10,
bei der die zweite Struktur linienförmig ist, wobei die entsprechenden Linien quer, vorzugsweise rechtwinklig zu den länglichen Zylinderlinsen der ersten Struktur ausgerichtet sind.Luminaire according to claim 9 or 10,
wherein the second structure is linear, the corresponding lines being oriented transversely, preferably at right angles to the elongate cylindrical lenses of the first structure.
EP10158987.7A 2009-04-06 2010-04-01 Luminaire with optical element Active EP2239495B1 (en)

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