EP2355076B1 - Lamp with bendable light influencing means - Google Patents

Lamp with bendable light influencing means Download PDF

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Publication number
EP2355076B1
EP2355076B1 EP11153775.9A EP11153775A EP2355076B1 EP 2355076 B1 EP2355076 B1 EP 2355076B1 EP 11153775 A EP11153775 A EP 11153775A EP 2355076 B1 EP2355076 B1 EP 2355076B1
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EP
European Patent Office
Prior art keywords
light
influencing element
luminaire
light sources
influencing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP11153775.9A
Other languages
German (de)
French (fr)
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EP2355076A3 (en
EP2355076A2 (en
Inventor
Bernd Oberhauser
Bernd Metzler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zumtobel Lighting GmbH Austria
Original Assignee
Zumtobel Lighting GmbH Austria
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Publication of EP2355076A2 publication Critical patent/EP2355076A2/en
Publication of EP2355076A3 publication Critical patent/EP2355076A3/en
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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/18—Edge-illuminated signs
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
    • G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
    • G08B7/062—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources indicating emergency exits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
    • G09F13/08—Signs, boards or panels, illuminated from behind the insignia using both translucent and non-translucent layers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/20—Illuminated signs; Luminous advertising with luminescent surfaces or parts
    • G09F13/22—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
    • G09F13/0418—Constructional details
    • G09F2013/05—Constructional details indicating exit way or orientation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/18—Edge-illuminated signs
    • G09F2013/184—Information to display
    • G09F2013/185—Embossed marks
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/18—Edge-illuminated signs
    • G09F2013/184—Information to display
    • G09F2013/1854—Light diffusing layer
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/20—Illuminated signs; Luminous advertising with luminescent surfaces or parts
    • G09F13/22—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent
    • G09F2013/222—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent with LEDs

Definitions

  • the invention relates to a lamp with the features mentioned in the preamble of claim 1.
  • a luminaire with a plurality of individual, quasi-point-shaped light sources, which are arranged along a rectilinear region individual light points generally appear at the points of light sources when light is emitted.
  • the light output along the area is as uniform as possible, so that a corresponding "homogenization" of the light output is to be effected. This is referred to below as “homogenization” of the light output.
  • a light influencing element for optically influencing the light emitted by the light sources for example in the form of an optically diffuse-acting element which is arranged in front of the light sources.
  • LEDs light-emitting diodes
  • a straight row has been used to replace a fluorescent tube as a light source.
  • the stated task of homogenizing the light output regularly arises.
  • a luminaire in which a plurality of LEDs are arranged on an elongated platform.
  • an approximately semicylindrical cover is arranged above the platform around the LEDs.
  • Light-emitting element in which LEDs are arranged on a printed circuit board.
  • the printed circuit board is covered by a flexible layer, which has concave cavities in the area of the LEDs, so that plano-convex lenses are formed for the LEDs.
  • the invention has for its object to provide a lamp in which said homogenization of the light output can be better achieved, in particular with less effort.
  • a luminaire which has a luminous means for generating and emitting a light, wherein the luminous means comprises a plurality of individual light sources, which are arranged side by side, in particular along a rectilinear region; Furthermore, the luminaire has a light influencing element with a translucent part for optically influencing the light emitted by the luminous means; In this case, the translucent part of the light influencing element is flexible and arranged such that it has a curved surface.
  • the translucent part can be realized with very little material expenditure and particularly simple in the production and installation in the luminaire. As a result, the required effort in the manufacture of the lamp can be reduced. In addition, this is a weight reduction of the lamp allows.
  • the light-influencing element consists of a film of uniform thickness.
  • a film of uniform thickness is particularly inexpensive and easy to handle.
  • the curved surface of the translucent part has two surface normals that span an angle of at least 120 °, preferably of at least 160 °.
  • a particularly broad light emission range can be achieved through the light influencing element.
  • the curved surface with respect to the individual light sources is configured such that, in a section through one of the light sources and transversely to viewed in the rectilinear region, is substantially equidistant from the one of the light sources throughout the translucent region. This allows a particularly uniform light output.
  • the light-influencing element preferably has latching elements for holding the light-influencing element on a further luminaire component. This allows a particularly simple assembly and disassembly of the light influencing element.
  • the lamp further comprises a device carrier for supporting a device for operating the lamp, wherein the light sources are arranged on the equipment carrier.
  • the device carrier may be particularly advantageously the further luminaire component on which the light-influencing element is held with its latching elements.
  • the light sources may be LEDs.
  • the lamp also has a further light-influencing element, which is arranged such that the light emitted by the light source first passes through the first-mentioned light-influencing element and then the further light-influencing element.
  • the further light-influencing element can be, for example, a signal display element.
  • the light is advantageously an emergency light, for example a light for indicating an escape route in an emergency.
  • an emergency luminaire in order to be clearly recognizable, a particularly uniform light output is generally desired, so that in this case the said homogenization is particularly advantageous.
  • Fig. 1 an exploded view of an embodiment of a lamp according to the invention is shown.
  • the lamp is an emergency or emergency light, with the example, an escape route can be signaled.
  • Fig. 2 shows a corresponding cross section, Fig. 3 a corresponding longitudinal section.
  • the luminaire has a luminous means 2 for generating and emitting a light.
  • the luminous means 2 comprises a plurality of individual light sources, which are arranged side by side, in particular along a rectilinear region.
  • the light sources can be arranged lying on a straight line.
  • the light sources may also be arranged on a non-straight line, for example on a zigzag line or wavy line, the line extending overall within the rectilinear region.
  • the light sources can be quasi "punctiform". As in Fig. 3 shown, in the illustrated embodiment, the lighting means 2, for example, six individual light sources.
  • the light sources may be LEDs. More specifically, the lamp 2 may consist of several LEDs.
  • the luminaire has a light-influencing element 4, which has a light-transmitting part 5 for optically influencing the light emitted by the luminous means 2.
  • the translucent part 5 may be designed such that it contributes to the homogenization of the light output of the luminaire.
  • the light-transmissive member 5 may be configured optically diffuse. It may in particular consist of a light-scattering material.
  • the translucent part 5 of the light influencing element 4 is flexible and bent so that it has a curved surface, as shown in FIGS FIGS. 1 and 2 evident.
  • the translucent part 5 may be made of a film.
  • the entire light influencing element 4 consists of a foil.
  • the translucent part 5 may form the light influencing element 4, or the translucent part 5 and the light influencing element 4 may be identical.
  • a possible demarcation between the translucent part 5 per se and the remaining light influencing element 2 is in Fig. 1 outlined by the reference numeral 7.
  • a corresponding elongated film is shown in the non-bent state in the outline, which can be formed by appropriate bending to the illustrated light influencing element 4. Due to the residual stress of the film can be in the FIGS. 1 to 3 achieve shown curved or curved surface shape.
  • the light influencing element 4 thus formed thus represents, as it were, a diffuser which spans the row of LEDs.
  • the light-influencing element 4 can span the rectilinear region on which the light sources or LEDs are arranged. This arrangement, with which the homogenization of the light output of the individual light sources can be achieved, is significantly cheaper to realize than would be the case when using a diffuser made of a solid, solid or quasi-inflexible material.
  • a corresponding film is particularly simple and inexpensive to manufacture and also easy to handle, so that an assembly of the lamp can be done by this particularly easy to handle.
  • the film may have a uniform thickness, that is, have the same constant thickness at all points.
  • Each of the two surfaces of the film can be completely unstructured or planar.
  • the film may for example consist of PMMA (polymethylmethacrylate).
  • the thickness may for example be between 0.1 mm and 1 mm, preferably between 0.2 and 0.5 mm, for example 0.25 mm.
  • the curvature of the surface of the light-permeable region 5 is relatively pronounced, so that the light emitted by the light-emitting means 2 can pass through the light-influencing element 4 in a wide range of light cones.
  • the curved surface of the translucent part 5 - as in Fig. 2 sketched - have two surface normals F1 and F2 , which span an angle of at least 120 °, preferably of at least 160 °. The greater the maximum angle spanned, the greater generally the solid angle in which the light emitted by the luminous means 2 can pass through the light influencing element 4.
  • the curved surface with respect to the individual light sources is designed such that, as in FIG Fig. 2 as viewed in a section through one of the light sources and transversely to the rectilinear region, is substantially equidistant from the one of the light sources across the entire transparent region 5.
  • This allows a particularly uniform homogenization of the light output.
  • substantially equal is meant that the distance to the corresponding light source along the curved surface varies by a maximum of 20%, preferably a maximum of 10%.
  • a particularly simple installation of the light influencing element 4 is made possible if the light influencing element 4 - as in Fig. 1 sketched - latching elements 6 for mounting on a further lighting component.
  • the light influencing element 4 - as in Fig. 1 sketched - latching elements 6 for mounting on a further lighting component can be provided for this purpose along the two longitudinal sides of the film tabs.
  • the lamp may have a device carrier 8, which is provided for carrying a device for operating the lamp or for the operation of the light sources, wherein the light-emitting means 2 is arranged fixed on the device carrier 8.
  • the equipment carrier 8 is shown in a different perspective in a separate representation.
  • the device carrier 8 can advantageously form the further luminaire component, on which the light influencing element 4 is held.
  • the device carrier 8 can have, for example, recesses or openings 9 for receiving the latching elements 6 of the light-influencing element 4 on two longitudinal sides.
  • the luminaire can also have a further light-influencing element 10, for example in the form of an approximately cuboid radiating element, which is arranged and designed in such a way that it receives the light sources and the first-mentioned light influencing element 4 in its inner region.
  • the further light-influencing element 10 can be held on the device carrier 8.
  • the further light-influencing element 10 may be a carrier of a signal, for example for identifying an escape route or the like.
  • Another advantage is that by selecting the width of the film in a simple manner, the size of the curved surface can be adjusted. This can be realized in a simple manner different dimensions for the curved diffuser.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Electroluminescent Light Sources (AREA)

Description

Die Erfindung betrifft eine Leuchte mit den im Oberbegriff des Anspruchs 1 genannten Merkmalen.The invention relates to a lamp with the features mentioned in the preamble of claim 1.

Bei einer Leuchte mit mehreren einzelnen, quasi punktförmigen Lichtquellen, die längs eines geradlinigen Bereichs angeordnet sind, erscheinen bei Lichtabgabe im Allgemeinen einzelne Lichtpunkte an den Stellen der Lichtquellen. Oft ist jedoch bei einer solchen Leuchte erwünscht, dass die Lichtabgabe längs des Bereichs möglichst gleichmäßig erfolgt, so dass eine entsprechende "Vergleichmäßigung" der Lichtabgabe bewirkt werden soll. Dies sei im Folgenden mit "Homogenisierung" der Lichtabgabe bezeichnet. Hierzu ist es bekannt, ein Lichtbeeinflussungselement zur optischen Beeinflussung des von den Lichtquellen abgestrahlten Lichts zu verwenden, beispielswiese in Form eines optisch diffus wirkenden Elements, das vor den Lichtquellen angeordnet wird.In a luminaire with a plurality of individual, quasi-point-shaped light sources, which are arranged along a rectilinear region, individual light points generally appear at the points of light sources when light is emitted. Often, however, it is desirable in such a luminaire that the light output along the area is as uniform as possible, so that a corresponding "homogenization" of the light output is to be effected. This is referred to below as "homogenization" of the light output. For this purpose, it is known to use a light influencing element for optically influencing the light emitted by the light sources, for example in the form of an optically diffuse-acting element which is arranged in front of the light sources.

In jüngerer Zeit werden vermehrt LEDs (lichtemittierende Dioden), die in einer geraden Reihe angeordnet sind, dazu verwendet, eine Leuchtstoffröhre als Lichtquelle zu ersetzen. In solchen Fällen stellt sich regelmäßig die genannte Aufgabe der Homogenisierung der Lichtabgabe.More recently, LEDs (light-emitting diodes) arranged in a straight row have been used to replace a fluorescent tube as a light source. In such cases, the stated task of homogenizing the light output regularly arises.

Die entsprechenden, aus dem Stand der Technik bekannten Lichtbeeinflussungselemente erfordern in ihrer Herstellung in nennenswertem Ausmaß Kosten und Aufwand. Außerdem tragen die bekannten Elemente in der Regel zur merklichen Gewichtszunahme der Leuchte bei.The corresponding, known from the prior art light influencing elements require in their production to a significant extent cost and effort. In addition, the known elements usually contribute to the noticeable increase in weight of the lamp.

Aus der US 5,988,825 ist eine Leuchte bekannt, bei der mehrere LEDs auf einer länglichen Plattform angeordnet sind. Zur optischen Beeinflussung des von den LEDs abgestrahlten Lichts ist über der Plattform um die LEDs eine etwa halbzylinderförmige Abdeckung angeordnet.From the US 5,988,825 a luminaire is known in which a plurality of LEDs are arranged on an elongated platform. For optically influencing the light emitted by the LEDs, an approximately semicylindrical cover is arranged above the platform around the LEDs.

Aus der DE 196 21 148 A1 ist Leuchtelement bekannt, bei dem auf einer Leiterplatte LEDs angeordnet sind. Die Leiterplatte ist von einer flexiblen Schicht bedeckt, die im Bereich der LEDs konkave Aushöhlungen besitzt, so dass plan-konvexe Linsen für die LEDs gebildet sind.From the DE 196 21 148 A1 Light-emitting element is known in which LEDs are arranged on a printed circuit board. The printed circuit board is covered by a flexible layer, which has concave cavities in the area of the LEDs, so that plano-convex lenses are formed for the LEDs.

Der Erfindung liegt die Aufgabe zugrunde, eine Leuchte anzugeben, bei der die genannte Homogenisierung der Lichtabgabe besser, insbesondere mit weniger Aufwand erzielt werden kann.The invention has for its object to provide a lamp in which said homogenization of the light output can be better achieved, in particular with less effort.

Diese Aufgabe wird gemäß der Erfindung mit der in dem unabhängigen Anspruch angegebenen Leuchte gelöst. Besondere Ausführungsformen der Erfindung sind in den abhängigen Ansprüchen angegeben.This object is achieved according to the invention with the lamp specified 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 zum Erzeugen und Abstrahlen eines Lichts aufweist, wobei das Leuchtmittel mehrere einzelne Lichtquellen umfasst, die nebeneinander, insbesondere längs eines geradlinigen Bereichs angeordnet sind; weiterhin weist die Leuchte ein Lichtbeeinflussungselement mit einem lichtdurchlässigen Teil zur optischen Beeinflussung des von dem Leuchtmittel abgestrahlten Lichts auf; dabei ist der lichtdurchlässige Teil des Lichtbeeinflussungselements biegsam und derart angeordnet, dass er eine gewölbte Oberfläche aufweist.According to the invention, a luminaire is provided, which has a luminous means for generating and emitting a light, wherein the luminous means comprises a plurality of individual light sources, which are arranged side by side, in particular along a rectilinear region; Furthermore, the luminaire has a light influencing element with a translucent part for optically influencing the light emitted by the luminous means; In this case, the translucent part of the light influencing element is flexible and arranged such that it has a curved surface.

Durch die biegsame Gestaltung lässt sich der lichtdurchlässigen Teil mit besonders wenig Materialaufwand und besonders einfach in der Herstellung und Montage in der Leuchte realisieren. Hierdurch lässt sich der erforderliche Aufwand bei der Herstellung der Leuchte verringern. Außerdem ist hierdurch eine Gewichtsreduzierung der Leuchte ermöglicht.Due to the flexible design, the translucent part can be realized with very little material expenditure and particularly simple in the production and installation in the luminaire. As a result, the required effort in the manufacture of the lamp can be reduced. In addition, this is a weight reduction of the lamp allows.

Erfindungsgemäß besteht das Lichtbeeinflussungselement aus einer Folie einheitlicher Stärke. Eine Folie einheitlicher Stärke ist besonders kostengünstig und handhabungsfreundlich.According to the invention, the light-influencing element consists of a film of uniform thickness. A film of uniform thickness is particularly inexpensive and easy to handle.

Vorzugsweise weist die gewölbte Oberfläche des lichtdurchlässigen Teils zwei Flächennormalen auf, die einen Winkel von mindestens 120°, vorzugsweise von mindestens 160° aufspannen. Durch eine entsprechend starke Wölbung lässt sich ein besonders breiter Lichtabstrahlbereich durch das Lichtbeeinflussungselement hindurch erzielen.Preferably, the curved surface of the translucent part has two surface normals that span an angle of at least 120 °, preferably of at least 160 °. By a correspondingly strong curvature, a particularly broad light emission range can be achieved through the light influencing element.

Vorzugsweise ist die gewölbte Oberfläche mit Bezug auf die einzelnen Lichtquellen derart ausgestaltet, dass sie, in einem Schnitt durch eine der Lichtquellen und quer zu dem geradlinigen Bereich betrachtet, über den gesamten lichtdurchlässigen Bereich hinweg im Wesentlichen gleich weit von der einen der Lichtquellen entfernt ist. Hierdurch ist eine besonders gleichmäßige Lichtabgabe ermöglicht.Preferably, the curved surface with respect to the individual light sources is configured such that, in a section through one of the light sources and transversely to viewed in the rectilinear region, is substantially equidistant from the one of the light sources throughout the translucent region. This allows a particularly uniform light output.

Vorzugsweise weist das Lichtbeeinflussungselement Verrastungselemente zur Halterung des Lichtbeeinflussungselements an einem weiteren Leuchtenbauteil auf. Dies ermöglicht eine besonders einfache Montage sowie Demontage des Lichtbeeinflussungselements.The light-influencing element preferably has latching elements for holding the light-influencing element on a further luminaire component. This allows a particularly simple assembly and disassembly of the light influencing element.

Vorzugsweise weist die Leuchte weiterhin einen Geräteträger zum Tragen eines Geräts zum Betrieb der Leuchte auf, wobei die Lichtquellen auf dem Geräteträger angeordnet sind. Dabei kann besonders vorteilhaft der Geräteträger das weitere Leuchtenbauteil sein, an dem das Lichtbeeinflussungselement mit seinen Verrastungselementen gehaltert ist.Preferably, the lamp further comprises a device carrier for supporting a device for operating the lamp, wherein the light sources are arranged on the equipment carrier. In this case, the device carrier may be particularly advantageously the further luminaire component on which the light-influencing element is held with its latching elements.

Bei den Lichtquellen kann es sich um LEDs handeln.The light sources may be LEDs.

Vorzugsweise weist die Leuchte außerdem ein weiteres Lichtbeeinflussungselement auf, das derart angeordnet ist, dass das von dem Leuchtmittel abgestrahlte Licht zuerst das zuerst genannte Lichtbeeinflussungselement durchsetzt und anschließend das weitere Lichtbeeinflussungselement. Bei dem weiteren Lichtbeeinflussungselement kann es sich beispielsweise um ein Signaldarstellungselement handeln.Preferably, the lamp also has a further light-influencing element, which is arranged such that the light emitted by the light source first passes through the first-mentioned light-influencing element and then the further light-influencing element. The further light-influencing element can be, for example, a signal display element.

Vorteilhaft handelt es sich bei der Leuchte um eine Notleuchte, beispielsweise um eine Leuchte zur Anzeige eines Fluchtwegs in einem Notfall. Bei einer Notleuchte ist im Allgemeinen zur deutlichen Erkennbarkeit eine besonders gleichmäßige Lichtabgabe gewünscht, so dass in diesem Fall die genannte Homogenisierung besonders vorteilhaft ist.The light is advantageously an emergency light, for example a light for indicating an escape route in an emergency. In an emergency luminaire, in order to be clearly recognizable, a particularly uniform light output is generally desired, so that in this case the said homogenization is particularly advantageous.

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

Fig. 1
eine Explosionsdarstellung eines Ausführungsbeispiels einer erfindungsgemäßen Leuchte,
Fig. 2
einen Querschnitt durch die Leuchte,
Fig. 3
einen Längsschnitt durch die Leuchte,
Fig. 4
das Lichtbeeinflussungselement gemäß dem Ausführungsbeispiel und
Fig. 5
den Geräteträger des Ausführungsbeispiels.
The invention is explained in more detail below with reference to an embodiment and with reference to the drawings. Show it:
Fig. 1
an exploded view of an embodiment of a lamp according to the invention,
Fig. 2
a cross section through the lamp,
Fig. 3
a longitudinal section through the lamp,
Fig. 4
the light influencing element according to the embodiment and
Fig. 5
the device carrier of the embodiment.

In Fig. 1 ist eine Explosionsdarstellung eines Ausführungsbeispiels einer erfindungsgemäßen Leuchte dargestellt. Beim Ausführungsbeispiel handelt es sich bei der Leuchte um eine Notleuchte bzw. Notlichtleuchte, mit der beispielsweise ein Fluchtweg signalisiert werden kann. Fig. 2 zeigt einen entsprechenden Querschnitt, Fig. 3 einen entsprechenden Längsschnitt.In Fig. 1 an exploded view of an embodiment of a lamp according to the invention is shown. In the exemplary embodiment, the lamp is an emergency or emergency light, with the example, an escape route can be signaled. Fig. 2 shows a corresponding cross section, Fig. 3 a corresponding longitudinal section.

Die Leuchte weist ein Leuchtmittel 2 zum Erzeugen und Abstrahlen eines Lichts auf. Das Leuchtmittel 2 umfasst mehrere einzelne Lichtquellen, die nebeneinander, insbesondere längs eines geradlinigen Bereichs angeordnet sind. Insbesondere können die Lichtquellen auf einer Gerade liegend angeordnet sein. Die Lichtquellen können aber auch auf einer nicht geraden Linie, beispielsweise auf einer Zickzacklinie oder wellenförmigen Linie angeordnet sein, wobei sich die Linie insgesamt innerhalb des geradlinigen Bereichs erstreckt.The luminaire has a luminous means 2 for generating and emitting a light. The luminous means 2 comprises a plurality of individual light sources, which are arranged side by side, in particular along a rectilinear region. In particular, the light sources can be arranged lying on a straight line. However, the light sources may also be arranged on a non-straight line, for example on a zigzag line or wavy line, the line extending overall within the rectilinear region.

Die Lichtquellen können quasi "punktförmig" sein. Wie in Fig. 3 gezeigt, umfasst im gezeigten Ausführungsbeispiel das Leuchtmittel 2 beispielsweise sechs einzelne Lichtquellen. Bei den Lichtquellen kann es sich um LEDs handeln. Spezieller formuliert kann das Leuchtmittel 2 aus mehreren LEDs bestehen.The light sources can be quasi "punctiform". As in Fig. 3 shown, in the illustrated embodiment, the lighting means 2, for example, six individual light sources. The light sources may be LEDs. More specifically, the lamp 2 may consist of several LEDs.

Weiterhin weist die Leuchte ein Lichtbeeinflussungselement 4 auf, das einen lichtdurchlässigen Teil 5 zur optischen Beeinflussung des von dem Leuchtmittel 2 abgestrahlten Lichts aufweist. Insbesondere kann der lichtdurchlässige Teil 5 derart gestaltet sein, dass er zur Homogenisierung der Lichtabgabe der Leuchte beiträgt. Beispielswiese kann der lichtdurchlässige Teil 5 optisch diffus wirkend ausgestaltet sein. Er kann insbesondere aus einem lichtstreuenden Material bestehen.Furthermore, the luminaire has a light-influencing element 4, which has a light-transmitting part 5 for optically influencing the light emitted by the luminous means 2. In particular, the translucent part 5 may be designed such that it contributes to the homogenization of the light output of the luminaire. For example, the light-transmissive member 5 may be configured optically diffuse. It may in particular consist of a light-scattering material.

Der lichtdurchlässige Teil 5 des Lichtbeeinflussungselements 4 ist biegsam bzw. flexibel und derart gebogen angeordnet, dass er eine gewölbte Oberfläche aufweist, wie aus den Figuren 1 und 2 hervorgeht. Beispielswiese kann der lichtdurchlässige Teil 5 aus einer Folie bestehen. Vorzugsweise besteht - wie im Ausführungsbeispiel der Fall - das gesamte Lichtbeeinflussungselement 4 aus einer Folie. In diesem Fall kann der lichtdurchlässige Teil 5 das Lichtbeeinflussungselement 4 bilden bzw. der lichtdurchlässige Teil 5 und das Lichtbeeinflussungselement 4 identisch sein. Eine mögliche Abgrenzung zwischen dem lichtdurchlässigen Teil 5 an sich und dem restlichen Lichtbeeinflussungselement 2 ist in Fig. 1 mit dem Bezugszeichen 7 skizziert.The translucent part 5 of the light influencing element 4 is flexible and bent so that it has a curved surface, as shown in FIGS FIGS. 1 and 2 evident. For example, the translucent part 5 may be made of a film. Preferably, as in the exemplary embodiment of the case, the entire light influencing element 4 consists of a foil. In this case, the translucent part 5 may form the light influencing element 4, or the translucent part 5 and the light influencing element 4 may be identical. A possible demarcation between the translucent part 5 per se and the remaining light influencing element 2 is in Fig. 1 outlined by the reference numeral 7.

In Fig. 4 ist eine entsprechende längliche Folie im nicht gebogenen Zustand im Umriss gezeigt, die durch entsprechende Biegung zum dargestellten Lichtbeeinflussungselement 4 geformt werden kann. Aufgrund der Eigenspannung der Folie lässt sich die in den Figuren 1 bis 3 gezeigte gewölbte bzw. gekrümmte Oberflächenform erzielen. Das so gebildete Lichtbeeinflussungselement 4 stellt also gleichsam einen Diffusor dar, der die Reihe der LEDs überspannt. Insbesondere kann das Lichtbeeinflussungselement 4 den geradlinigen Bereich überspannen, auf dem die Lichtquellen bzw. LEDs angeordnet sind. Diese Anordnung, mit der die Vergleichmäßigung der Lichtabgabe der einzelnen Lichtquellen erzielt werden kann, ist deutlich kostengünstiger zu realisieren, als dies bei Verwendung eines Diffusors aus einem massiven, festen bzw. quasi unbiegsamen Materials der Fall wäre.In Fig. 4 a corresponding elongated film is shown in the non-bent state in the outline, which can be formed by appropriate bending to the illustrated light influencing element 4. Due to the residual stress of the film can be in the FIGS. 1 to 3 achieve shown curved or curved surface shape. The light influencing element 4 thus formed thus represents, as it were, a diffuser which spans the row of LEDs. In particular, the light-influencing element 4 can span the rectilinear region on which the light sources or LEDs are arranged. This arrangement, with which the homogenization of the light output of the individual light sources can be achieved, is significantly cheaper to realize than would be the case when using a diffuser made of a solid, solid or quasi-inflexible material.

Eine entsprechende Folie ist besonders einfach und kostengünstig in der Herstellung und lässt sich zudem einfach handhaben, so dass eine Montage der Leuchte hierdurch besonders handhabungsfreundlich erfolgen kann.A corresponding film is particularly simple and inexpensive to manufacture and also easy to handle, so that an assembly of the lamp can be done by this particularly easy to handle.

Insbesondere kann die Folie eine einheitliche Stärke aufweisen, also an allen Stellen dieselbe konstante Stärke aufweisen. Jede der beiden Oberflächen der Folie kann vollständig unstrukturiert bzw. plan sein. Die Folie kann beispielsweise aus PMMA (Polymethylmethacrylat) bestehen. Die Stärke kann beispielsweise zwischen 0,1 mm und 1 mm, vorzugsweise zwischen 0,2 und 0,5 mm, beispielsweise 0,25 mm betragen.In particular, the film may have a uniform thickness, that is, have the same constant thickness at all points. Each of the two surfaces of the film can be completely unstructured or planar. The film may for example consist of PMMA (polymethylmethacrylate). The thickness may for example be between 0.1 mm and 1 mm, preferably between 0.2 and 0.5 mm, for example 0.25 mm.

Vorzugsweise ist die Wölbung der Oberfläche des lichtdurchlässigen Bereichs 5 relativ stark ausgeprägt, so dass das von dem Leuchtmittel 2 abgestrahlte Licht in einem weiten Lichtkegelbereich das Lichtbeeinflussungselement 4 durchsetzen kann. Beispielsweise kann die gewölbte Oberfläche des lichtdurchlässigen Teils 5 - wie in Fig. 2 skizziert - zwei Flächennormalen F1 und F2 aufweisen, die einen Winkel von mindestens 120°, vorzugsweise von mindestens 160° aufspannen. Je größer der so maximal aufgespannte Winkel, desto größer im Allgemeinen der Raumwinkel, in dem das von dem Leuchtmittel 2 abgestrahlte Licht das Lichtbeeinflussungselement 4 durchsetzen kann.Preferably, the curvature of the surface of the light-permeable region 5 is relatively pronounced, so that the light emitted by the light-emitting means 2 can pass through the light-influencing element 4 in a wide range of light cones. For example, the curved surface of the translucent part 5 - as in Fig. 2 sketched - have two surface normals F1 and F2 , which span an angle of at least 120 °, preferably of at least 160 °. The greater the maximum angle spanned, the greater generally the solid angle in which the light emitted by the luminous means 2 can pass through the light influencing element 4.

Vorzugsweise ist die gewölbte Oberfläche mit Bezug auf die einzelnen Lichtquellen derart ausgestaltet, dass sie - wie in Fig. 2 gezeigt - in einem Schnitt durch eine der Lichtquellen und quer zu dem geradlinigen Bereich betrachtet, über den gesamten lichtdurchlässigen Bereich 5 hinweg im Wesentlichen gleich weit von der einen der Lichtquellen entfernt ist. Hierdurch ist eine besonders gleichmäßige Homogenisierung der Lichtabgabe ermöglicht. Mit "im Wesentlichen gleich weit" sei dabei bezeichnet, dass die Entfernung zu der entsprechenden Lichtquelle längs der gewölbten Oberfläche maximal um 20%, vorzugsweise maximal um 10% schwankt.Preferably, the curved surface with respect to the individual light sources is designed such that, as in FIG Fig. 2 as viewed in a section through one of the light sources and transversely to the rectilinear region, is substantially equidistant from the one of the light sources across the entire transparent region 5. This allows a particularly uniform homogenization of the light output. By "substantially equal" is meant that the distance to the corresponding light source along the curved surface varies by a maximum of 20%, preferably a maximum of 10%.

Eine besonders einfache Montage des Lichtbeeinflussungselements 4 ist ermöglicht, wenn das Lichtbeeinflussungselement 4 - wie in Fig. 1 skizziert - Verrastungselemente 6 zur Halterung an einem weiteren Leuchtenbauteil aufweist. Beispielsweise können hierfür entlang der beiden Längsseiten der Folie Laschen vorgesehen sein.A particularly simple installation of the light influencing element 4 is made possible if the light influencing element 4 - as in Fig. 1 sketched - latching elements 6 for mounting on a further lighting component. For example, can be provided for this purpose along the two longitudinal sides of the film tabs.

Wie in Fig. 1 skizziert, kann die Leuchte einen Geräteträger 8 aufweisen, der zum Tragen eines Geräts zum Betrieb der Leuchte bzw. zum Betrieb der Lichtquellen vorgesehen ist, wobei das Leuchtmittel 2 lagefest auf dem Geräteträger 8 angeordnet ist. In Fig. 5 ist der Geräteträger 8 in anderer Perspektive in separater Darstellung gezeigt. In diesem Fall kann der Geräteträger 8 vorteilhaft das weitere Leuchtenbauteil bilden, an dem das Lichtbeeinflussungselement 4 gehaltert ist. Der Geräteträger 8 kann hierzu beispielsweise an zwei Längsseiten Ausnehmungen bzw. Öffnungen 9 zur Aufnahme der Verrastungselemente 6 des Lichtbeeinflussungselements 4 aufweisen.As in Fig. 1 sketched, the lamp may have a device carrier 8, which is provided for carrying a device for operating the lamp or for the operation of the light sources, wherein the light-emitting means 2 is arranged fixed on the device carrier 8. In Fig. 5 the equipment carrier 8 is shown in a different perspective in a separate representation. In this case, the device carrier 8 can advantageously form the further luminaire component, on which the light influencing element 4 is held. For this purpose, the device carrier 8 can have, for example, recesses or openings 9 for receiving the latching elements 6 of the light-influencing element 4 on two longitudinal sides.

Die Leuchte kann außerdem ein weiteres Lichtbeeinflussungselement 10 aufweisen, beispielsweise in Form eines etwa quaderförmigen Abstrahlkörpers, der so angeordnet und gestaltet ist, dass er in seinem inneren Bereich die Lichtquellen und das zuerst genannte Lichtbeeinflussungselement 4 aufnimmt. Das weitere Lichtbeeinflussungselement 10 kann an dem Geräteträger 8 gehaltert sein. Das weitere Lichtbeeinflussungselement 10 kann Träger eines Signals sein, beispielswiese zur Kennung eines Fluchtwegs oder dergleichen.The luminaire can also have a further light-influencing element 10, for example in the form of an approximately cuboid radiating element, which is arranged and designed in such a way that it receives the light sources and the first-mentioned light influencing element 4 in its inner region. The further light-influencing element 10 can be held on the device carrier 8. The further light-influencing element 10 may be a carrier of a signal, for example for identifying an escape route or the like.

Ein weiterer Vorteil besteht darin, dass durch Wahl der Breite der Folie auf einfache Weise die Größe der gewölbten Oberfläche eingestellt werden kann. Damit können in einfacher Weise unterschiedliche Abmessungen für den gekrümmten Diffusor realisiert werden.Another advantage is that by selecting the width of the film in a simple manner, the size of the curved surface can be adjusted. This can be realized in a simple manner different dimensions for the curved diffuser.

Claims (9)

  1. Luminaire comprising
    - a lighting means (2) for generating and emitting a light, wherein the lighting means (2) comprises a plurality of individual light sources which are adjacent to each other, in particular arranged along a rectilinear region, and
    - a light-influencing element (4) having a translucent part (5) for the optical influencing of the light emitted by the lighting means (2), wherein the translucent part (5) of the light-influencing element (4) is flexible and is so arranged that it has a curved surface,
    characterized in that,
    the light-influencing element (4) consists of a film of uniform thickness.
  2. Luminaire according to claim 1,
    wherein the curved surface of the translucent part (5) has two surface normals (F1, F2) which span an angle of at least 120°, preferably at least 160°.
  3. Luminaire according to one of the preceding claims,
    wherein the curved surface is so configured with respect to the individual light sources that the entire translucent part (5) is substantially equidistant from one of light sources as seen in a section through one of the light sources and transverse to the rectilinear region.
  4. Luminaire according to one of the preceding claims,
    wherein the light-influencing element (4) comprises latching elements (6) for holding the light-influencing element (4) on a further luminaire component.
  5. Luminaire according to one of the preceding claims, further comprising
    - a device support (8) to support a device for operating the luminaire, wherein the light sources are arranged on the device support (8).
  6. Luminaire with the features mentioned in the claims 4 and 5, wherein the further lighting component is the device support (8).
  7. Luminaire according to one of the preceding claims, wherein the light sources are LEDs.
  8. Luminaire according to one of the preceding claims, further comprising
    - a further light-influencing element (10) which is so arranged that the light emitted by the lighting means (2) first passes through the first-mentioned light-influencing element (4) and then the further light-influencing element (10).
  9. Luminaire according to one of the preceding claims in the form of an emergency luminaire.
EP11153775.9A 2010-02-09 2011-02-09 Lamp with bendable light influencing means Active EP2355076B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202010002049U DE202010002049U1 (en) 2010-02-09 2010-02-09 Luminaire with flexible light influencing element

Publications (3)

Publication Number Publication Date
EP2355076A2 EP2355076A2 (en) 2011-08-10
EP2355076A3 EP2355076A3 (en) 2011-08-31
EP2355076B1 true EP2355076B1 (en) 2016-06-22

Family

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EP (1) EP2355076B1 (en)
DE (1) DE202010002049U1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012101950A1 (en) * 2012-03-08 2013-09-12 Rp-Technik E.K. Safety lamp installed in electrified tunnel for rail vehicle e.g. train, has LEDs to emit light that is radiated and oriented to translucent region including window aligned in insulating housing that protects inner space of lamp module
DE202012101308U1 (en) 2012-04-12 2013-07-15 Zumtobel Lighting Gmbh Luminaire, in particular indicator light

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9204206U1 (en) * 1992-03-25 1992-08-06 LED Lichteffekte GmbH, 10315 Berlin Lighting elements arranged in a defined geometric shape
DE19621148A1 (en) * 1996-05-14 1997-12-04 Magna Reflex Holding Gmbh Lighting element, especially e.g. for use in motor vehicles
US5954423A (en) * 1997-05-02 1999-09-21 Nsi Enterprises, Inc. Light distribution diffuser for exit signs and the like illuminated by LED arrays
US5988825A (en) * 1997-05-02 1999-11-23 Nsi Enterprises, Inc. Housing frame for illuminated signs having multiple configurations
DE20217540U1 (en) * 2002-11-13 2003-01-16 Informationstechnik Meng Gmbh Unit for presentation of information comprises a plate which is made of a light-conducting plastic material, and accommodates at least one light emitting diode in the plate periphery
DE202008008977U1 (en) * 2008-07-04 2009-11-19 Pasedag, Roland Lighting fixture, in particular in the form of a rescue sign luminaire

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EP2355076A3 (en) 2011-08-31
EP2355076A2 (en) 2011-08-10

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