EP2518389B1 - Longitudinal optical element and assembly for emitting light with optical element - Google Patents

Longitudinal optical element and assembly for emitting light with optical element Download PDF

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Publication number
EP2518389B1
EP2518389B1 EP12165632.6A EP12165632A EP2518389B1 EP 2518389 B1 EP2518389 B1 EP 2518389B1 EP 12165632 A EP12165632 A EP 12165632A EP 2518389 B1 EP2518389 B1 EP 2518389B1
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Prior art keywords
optical element
light
shape
emitting diodes
arrangement
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EP12165632.6A
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German (de)
French (fr)
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EP2518389A3 (en
EP2518389B2 (en
EP2518389A2 (en
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Andreas Schwaighofer
Herbert Wessin
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Zumtobel Lighting GmbH Austria
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Zumtobel Lighting GmbH Austria
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Priority to PL12165632T priority Critical patent/PL2518389T3/en
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    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/506—Cooling arrangements characterised by the adaptation for cooling of specific components of globes, bowls or cover glasses
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to an elongated optical element for longitudinally successively arranged light emitting diodes and an arrangement for emitting light with LEDs, a first optical element and a second elongate optical element.
  • FIG. 1 shown in cross section.
  • the wet room lamp 1 in this case has as light source an elongated fluorescent lamp 4, which is surrounded by a likewise elongated optical element 2, wherein this optical element 2 is configured approximately semicircular in cross section and the fluorescent lamp 4 is placed within the semicircular configuration.
  • the optical element 2 is further arranged on or in a housing 3, so that the necessary for a moisture proof lightness can be achieved.
  • FIG. 2 gives here the light intensity distribution of in FIG. 1 again shown, the curve shown there corresponds to the values in the so-called C0 / C180 level, ie in the transverse direction of the lamp FIG. 1 , corresponds.
  • light-emitting diodes have a significantly more limited light emission characteristic or light intensity distribution compared to fluorescent lamps, whereby, for example, in the arrangement of light-emitting diodes in the area of the fluorescent lamp 4, ie within the semicircular configuration of the optical element 2 of the lamp 1 in FIG. 1 , no light intensity distribution can be achieved, which is only approximately the in FIG. 2 shown resembles.
  • the present invention has for its object to develop an arrangement for emitting light, can be replaced by LEDs in the fluorescent lamps, but at the same time do not deteriorate the lighting properties significantly.
  • an elongate optical element for light-emitting diodes which have a light-scattering characteristic and are substantially U-shaped in cross-section, the middle leg or middle region interconnecting the two side limbs or lateral regions of the U-shape has a concavity inward and the two side legs or lateral portions of the U-shape are inclined inwardly towards each other, so that the side legs or lateral areas at their ends a smaller distance from each other than in the area in which the Pass side legs or lateral areas into the middle leg or middle area of the U-shape.
  • an elongated optical element for light-emitting diodes which have a light-scattering characteristic and are substantially U-shaped in cross-section, the middle leg or middle region interconnecting the two side limbs or lateral regions
  • the U-shape has a concavity inwards and the two side legs or lateral areas of the U-shape, in particular in the region of their ends, each have a curvature inward in the direction of the respective other side leg or side area.
  • the invention proposes an arrangement for emitting light, comprising the inventive elongated optical element as the first optical element, a second elongated optical element and light-emitting diodes, wherein in the light emission of the light emitting diodes, the first optical element with the opening of the U-shape in the direction of the LEDs is arranged directly in front of the LEDs and is surrounded by the second optical element.
  • the two side limbs or lateral regions of the U-shape can preferably also have a curvature in each case in the direction of the respective other side limb or lateral region, in particular in the region of their ends.
  • the concavity of the central limb or middle region of the U-shape can be pointed inwards so that a substantially V-shaped indentation results whose tip points into the U-shape.
  • the desired luminous intensity distribution of the arrangement according to the invention for emitting light results overall, however, then preferably from the interaction of the first and second optical elements, wherein in particular a light intensity distribution in the form of a Batwing is achieved.
  • the second optical element of the arrangement according to the invention for light emission has a light-refracting characteristic, wherein the refractive characteristic can result from elongated prismatic structures.
  • the second optical element is configured substantially semicircular in cross section, wherein the light emitting diodes can be arranged together with the first optical element within the semicircular configuration of the second optical element.
  • the arrangement according to the invention for emitting light has an elongate carrier element, on which the ends of the side legs or lateral areas of the first optical element can each be latched and on which an elongated circuit board can be held, on which the light emitting diodes are arranged ,
  • the board can be held by at least one pressing element on the elongated support element.
  • the carrier element and / or the first optical element can be rotatable in the longitudinal axis of the arrangement.
  • FIG. 1 As already explained, a moisture-proof luminaire 1 is shown, which corresponds to the in FIG. 2 shown light intensity distribution in the so-called C0 / C180 level and thus in the transverse direction of the lamp has.
  • FIG. 3 shows a non-inventive elongated optical element 5, which has a substantially U-shaped configuration in cross section with two side legs 6 and a middle leg 8, wherein, as shown in FIG. 3 shows that the two side legs 6 of the U-shaped optical element 5 are slightly inclined inwardly towards each other, such that the side legs 6 at their ends 7 have a smaller distance from each other than in the region in which the side legs 6 in the middle leg 8 of the U- shape pass.
  • the two side legs 6 interconnecting center leg 8 is curved inward or has a curvature inwards, resulting in the transitions of the side legs 6 in the middle leg 8 each side wings.
  • the shape of the optical element 5 according to the invention in cross section thus resembles in a broader sense the later desired light intensity distribution in the form of a batwing, wherein the shape of the optical element 5 is not identical to the shape of the distribution.
  • optical element may consist of a diffusely scattering material with, for example, a wall thickness of 0.3 mm, which results in a light-scattering characteristic of the optical element.
  • FIG. 4 shows the light intensity distribution of in FIG. 3 shown optical element 5 in the so-called C0 / C180 plane, ie in the transverse direction of the element, when at the opening of the U-shape of the optical element 5 LEDs are arranged. From this it can be seen that the very limited light emission characteristic or light intensity distribution of light-emitting diodes is significantly widened or widened by the optical element 5, which leads to the fact that the optical element 5 according to the invention together with light-emitting diodes can readily replace a fluorescent lamp.
  • FIG. 5 a non-inventive arrangement for emitting light 9 is shown, which is a comparable luminaire housing 3 as in FIG. 1 shown lamp 1 has. Also in FIG. 5 shown second optical element 2 corresponds to the optical element 2 FIG. 1 , In contrast to the light 1 in FIG. 1 is in the inventive arrangement for light output 9 now no fluorescent lamp 4 more provided. Instead of this fluorescent lamp 4, light-emitting diodes 10 are now used in the arrangement for emitting light 9, which are arranged one behind the other in the longitudinal direction and are fastened on an elongated circuit board 11. In addition, in the arrangement for emitting light 9, a first optical element is provided, wherein at the in FIG. 5 shown arrangement according to a non-inventive optical element 5 accordingly FIG. 3 is used. The light-emitting diodes 10 or the circuit board 11 are arranged on or in the opening of the first optical element 5, such that the first optical element 5 is arranged in the light emission direction directly in front of the light-emitting diodes 10.
  • the second optical element 2 is arranged, whereby this is also in the light emitting direction of the LEDs 10.
  • the first optical element 5 and the light-emitting diodes 10 or the circuit board 11 are now arranged in the arrangement for emitting light 9 such that they are located approximately in the area of the earlier fluorescent lamp 4.
  • the first optical element 5 is surrounded by the second optical element 2, wherein the first optical element 5 is arranged within the circular configuration of the second optical element 2. This becomes possible because the light emission characteristic or light intensity distribution of the light-emitting diodes is changed.
  • the desired light distribution is achieved by the interaction of the two optical elements 2 and 5, it being possible by the first optical element 5 according to the invention, in an existing elongated luminaire as shown in FIG. 1 is shown to replace the fluorescent lamp 4, without an adjustment of the optical element 2 shown there is necessary.
  • the non-inventive optical element 5 thus results in a deviating from the dot shape of the LED light source whose surface corresponds to the surface of the first optical element, which is achieved by the scattering properties of the first optical element.
  • FIG. 7 now additionally shows an elongated support member 12, on which the circuit board 11, on which the light-emitting diodes 10 are arranged, is held. This is done by pressing elements 13 which are latched to the support member 12 and exert pressure on the board 11, such that the board 11 is pressed against a surface of the support member 12 and thus held on the support member 12.
  • the first optical element 5 is held by the carrier element 12.
  • the two ends 7 of the side legs 6 of the U-shape can be latched to the support member 12, whereby, as well as from FIG. 7 it can be seen that the LEDs 10 and the board 11 can be protected from direct contact by the first optical element 5 according to the invention.
  • the support member may for example consist of aluminum and have a heat sink, which ensures optimized heat dissipation.
  • the carrier element is rotatably mounted within an inventive arrangement for emitting light about the longitudinal axis.
  • the first optical element could also be rotatably mounted about the longitudinal axis of the arrangement.
  • FIG. 8 an arrangement according to the invention for emitting light 19 is shown, in turn, a luminaire housing 3 and a second optical element 2, comparable to those in FIG. 5 shown.
  • 19 is in the light-emitting arrangement in FIG FIG. 8 a first optical Element 15 according to the embodiment of the present invention provided.
  • This elongated optical element 15 according to the invention also has a light-scattering characteristic and is also designed in a substantially U-shaped cross-section, wherein it has two lateral regions 16 and a central region 18.
  • the two lateral regions 16 of the U-shape in the region of their ends 17 are each curved inwards in the direction of the respective other lateral region 16, this curvature achieving a similar effect as the inclination of the side limbs 6 in the optical element 5 in FIG. 3 ,
  • the middle area 18 of the second embodiment is also curved inwards or has an inward curvature which is inwardly tapered, resulting in a concavity which is essentially a V-shaped one.
  • Form has the tip in the U-shape.
  • the luminous intensity distribution of in FIG. 8 The first optical element 15 shown thus resembles the light intensity distribution of the in FIG. 3 shown first optical element 9, which is why the in FIG. 8 shown arrangement for emitting light 19 a comparable light intensity distribution or light emission characteristic as in FIG. 5 has arrangement shown for emitting light 9.
  • the light-scattering characteristic of the optical element according to the invention leads to light-emitting diodes in conjunction with the optical element according to the invention can replace a fluorescent lamp, without making changes to the outer structure of a corresponding lamp or arrangement for light output.
  • the two fluorescent lamps arranged next to one another have the fluorescent lamps in each case by an optical element according to the invention and corresponding circuit boards or Light-emitting diodes are replaced, which then instead of the two fluorescent lamps two juxtaposed optical elements according to the invention are arranged in the lamp.
  • the possibility of cross-emission then additionally results.
  • two side by side arranged boards are provided with light-emitting diodes, which are surrounded by only one optical element according to the invention.

Description

Die vorliegende Erfindung betrifft ein längliches optisches Element für in Längsrichtung hintereinander angeordnete Leuchtdioden und eine Anordnung zur Lichtabgabe mit Leuchtdioden, einem ersten optischen Element und einem zweiten länglichen optischen Element.The present invention relates to an elongated optical element for longitudinally successively arranged light emitting diodes and an arrangement for emitting light with LEDs, a first optical element and a second elongate optical element.

Bei länglichen Anordnungen zur Lichtgabe bzw. Leuchten, die beispielsweise im gewerblichen Bereich Anwendung finden, kommen bisher häufig Leuchtstofflampen als Lichtquelle zum Einsatz. Um auch mit schwierigeren Umgebungsbedingungen zu Recht zu kommen, können derartige längliche Leuchten auch als Feuchtraumleuchten ausgebildet sein. Eine solche längliche Feuchtraumleuchte 1 ist in Figur 1 im Querschnitt dargestellt. Die Feuchtraumleuchte 1 weist hierbei als Lichtquelle eine längliche Leuchtstofflampe 4 auf, die von einem ebenfalls länglichen optischen Element 2 umgeben wird, wobei dieses optische Element 2 im Querschnitt etwa halbkreisförmig ausgestaltet ist und die Leuchtstofflampe 4 innerhalb der halbkreisförmigen Ausgestaltung platziert ist. Das optische Element 2 ist des Weiteren an bzw. in einem Gehäuse 3 angeordnet, derart dass die für eine Feuchtraumleuchte notwendige Dichtigkeit erreicht werden kann.In elongate arrangements for the application of light or luminaires, which are used, for example, in the commercial sector, fluorescent lamps have hitherto frequently been used as the light source. In order to come to terms with difficult environmental conditions right, such elongated lights can also be designed as wet room lights. Such an elongated moisture lamp 1 is in FIG. 1 shown in cross section. The wet room lamp 1 in this case has as light source an elongated fluorescent lamp 4, which is surrounded by a likewise elongated optical element 2, wherein this optical element 2 is configured approximately semicircular in cross section and the fluorescent lamp 4 is placed within the semicircular configuration. The optical element 2 is further arranged on or in a housing 3, so that the necessary for a moisture proof lightness can be achieved.

Um nun eine gewünschte Lichtverteilung für die Leuchte 1 zu erzielen, sind an der Innenseite des optischen Elements 2 längliche Prismenstrukturen vorgesehen, durch die im Wesentlichen eine sogenannte Batwing-Verteilung erreicht werden soll. Eine derartige Batwing-Verteilung ist in Figur 2 dargestellt. Figur 2 gibt hierbei die Lichtstärkeverteilung der in Figur 1 gezeigten Leuchte wieder, wobei die dort dargestellte Kurve den Werten in der sogenannten C0/C180 Ebene, also in Leuchtenquerrichtung entsprechend Figur 1, entspricht.In order to achieve a desired light distribution for the luminaire 1, elongated prism structures are provided on the inside of the optical element 2, by means of which essentially a so-called batwing distribution is to be achieved. Such a Batwing distribution is in FIG. 2 shown. FIG. 2 gives here the light intensity distribution of in FIG. 1 again shown, the curve shown there corresponds to the values in the so-called C0 / C180 level, ie in the transverse direction of the lamp FIG. 1 , corresponds.

Da nun in der Beleuchtungstechnik immer häufiger Leuchtdioden zum Einsatz kommen, die die herkömmlichen Leuchtmittel mehr und mehr ersetzen, ist es auch bei länglichen Leuchten wie beispielsweise der in Figur 1 gezeigten wünschenswert, anstelle einer Leuchtstofflampe Leuchtdioden einsetzen zu können. Hierfür sind beispielsweise Lösungen bekannt, bei denen eine Platine im Zentrum der Leuchte angeordnet wird, wobei auf dieser Platine dann in Längsrichtung hintereinander mehrere Leuchtdioden angeordnet werden. Problematisch ist bei dieser Ausgestaltung jedoch, dass Leuchtdioden im Vergleich zu Leuchtstofflampen eine deutlich eingeschränktere Lichtabstrahlcharakteristik bzw. Lichtstärkeverteilung aufweisen, wodurch beispielsweise bei der Anordnung von Leuchtdioden im Bereich der Leuchtstofflampe 4, also innerhalb der halbkreisförmigen Ausgestaltung des optischen Element 2 der Leuchte 1 in Figur 1, keine Lichtstärkeverteilung erreicht werden kann, die auch nur annäherungsweise der in Figur 2 gezeigten ähnelt.Since light-emitting diodes are increasingly being used in lighting technology, replacing conventional light sources more and more, it is also the case with elongated luminaires such as the FIG. 1 shown desirable, to be able to use LEDs instead of a fluorescent lamp. For this purpose, for example, solutions are known in which a circuit board is arranged in the center of the luminaire, wherein on this board then in the longitudinal direction one behind the other several LEDs are arranged. The problem with this design, however, is that light-emitting diodes have a significantly more limited light emission characteristic or light intensity distribution compared to fluorescent lamps, whereby, for example, in the arrangement of light-emitting diodes in the area of the fluorescent lamp 4, ie within the semicircular configuration of the optical element 2 of the lamp 1 in FIG FIG. 1 , no light intensity distribution can be achieved, which is only approximately the in FIG. 2 shown resembles.

Insgesamt besteht also das Problem, dass bei derartigen länglichen Leuchten der Einsatz von Leuchtdioden bisher zu lichttechnischen Eigenschaften führt, die nicht zufriedenstellend sind.Overall, therefore, there is the problem that in such elongated lights, the use of light-emitting diodes so far leads to photometric properties that are not satisfactory.

In der US 2006/0120107 A1 , der EP 2 263 036 A1 der EP 2 151 899 A2 , , der DE 20 2008 017 219 U1 und der AT 11 273 U1 sind nun verschiedene Leuchten bzw. Anordnungen zur Lichtabgabe gezeigt, die LEDs und optische Elemente aufweisen, wobei die optischen Elemente das von den LEDs abgegebene Licht beeinflussen.In the US 2006/0120107 A1 , of the EP 2 263 036 A1 of the EP 2 151 899 A2 , , of the DE 20 2008 017 219 U1 and the AT 11 273 U1 Now different lights or arrangements are shown for emitting light, the LEDs and optical elements, wherein the optical elements influence the light emitted by the LEDs light.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Anordnung zur Lichtabgabe zu entwickeln, bei der Leuchtstofflampen durch Leuchtdioden ersetzt werden können, gleichzeitig aber sich die lichttechnischen Eigenschaften nicht deutlich verschlechtern.The present invention has for its object to develop an arrangement for emitting light, can be replaced by LEDs in the fluorescent lamps, but at the same time do not deteriorate the lighting properties significantly.

Die Aufgabe wird durch ein längliches optisches Element gemäß den Ansprüchen 1 bzw. 3 und eine Anordnung zur Lichtabgabe gemäß Anspruch 5 gelöst. Vorteilhafte Weiterbildungen der Erfindung sind Gegenstand der abhängigen Ansprüche.The object is achieved by an elongated optical element according to claims 1 or 3 and an arrangement for emitting light according to claim 5. Advantageous developments of the invention are the subject of the dependent claims.

In einer ersten erfindungsgemäßen Ausführungsform wird ein längliches optisches Element für in Längsrichtung hintereinander angeordnete Leuchtdioden vorgeschlagen, das eine lichtstreuende Charakteristik aufweist und im Querschnitt im Wesentlichen U-förmig ausgebildet ist, wobei der die beiden Seitenschenkel bzw. seitlichen Bereiche miteinander verbindende Mittelschenkel bzw. mittlere Bereich der U-Form eine Einwölbung nach innen aufweist und die beiden Seitenschenkel bzw. seitlichen Bereiche der U-Form nach innen zueinander geneigt sind, derart dass die Seitenschenkel bzw. seitlichen Bereiche an ihren Enden einen geringeren Abstand zueinander aufweisen als in dem Bereich, in dem die Seitenschenkel bzw. seitlichen Bereiche in den Mittelschenkel bzw. mittleren Bereich der U-Form übergehen.In a first embodiment according to the invention, an elongate optical element is proposed for light-emitting diodes which have a light-scattering characteristic and are substantially U-shaped in cross-section, the middle leg or middle region interconnecting the two side limbs or lateral regions of the U-shape has a concavity inward and the two side legs or lateral portions of the U-shape are inclined inwardly towards each other, so that the side legs or lateral areas at their ends a smaller distance from each other than in the area in which the Pass side legs or lateral areas into the middle leg or middle area of the U-shape.

In einer zweiten erfindungsgemäßen Ausführungsform wird ein längliches optisches Element für in Längsrichtung hintereinander angeordnete Leuchtdioden vorgeschlagen, das eine lichtstreuende Charakteristik aufweist und im Querschnitt im Wesentlichen U-förmig ausgebildet ist, wobei der die beiden Seitenschenkel bzw. seitlichen Bereiche miteinander verbindende Mittelschenkel bzw. mittlere Bereich der U-Form eine Einwölbung nach innen aufweist und die beiden Seitenschenkel bzw. seitlichen Bereiche der U-Form, insbesondere im Bereich ihrer Enden, jeweils eine Krümmung nach innen in Richtung des jeweils anderen Seitenschenkels bzw. seitlichen Bereichs aufweisen.In a second embodiment according to the invention, an elongated optical element is proposed for light-emitting diodes which have a light-scattering characteristic and are substantially U-shaped in cross-section, the middle leg or middle region interconnecting the two side limbs or lateral regions The U-shape has a concavity inwards and the two side legs or lateral areas of the U-shape, in particular in the region of their ends, each have a curvature inward in the direction of the respective other side leg or side area.

Des Weiteren wird erfindungsgemäß eine Anordnung zur Lichtabgabe vorgeschlagen, die das erfindungsgemäße längliche optische Element als erstes optisches Element, ein zweites längliches optisches Element und Leuchtdioden aufweist, wobei in Lichtabstrahlrichtung der Leuchtdioden das erste optische Element mit der Öffnung der U-Form in Richtung der Leuchtdioden direkt vor den Leuchtdioden angeordnet ist und von dem zweiten optischen Element umgeben wird.Furthermore, the invention proposes an arrangement for emitting light, comprising the inventive elongated optical element as the first optical element, a second elongated optical element and light-emitting diodes, wherein in the light emission of the light emitting diodes, the first optical element with the opening of the U-shape in the direction of the LEDs is arranged directly in front of the LEDs and is surrounded by the second optical element.

Die beiden Seitenschenkel bzw. seitlichen Bereiche der U-Form können bei der ersten erfmdungsgemäßen Ausführungsform vorzugsweise, insbesondere im Bereich ihrer Enden, auch jeweils eine Krümmung nach innen in Richtung des jeweils anderen Seitenschenkels bzw. seitlichen Bereichs aufweisen.In the case of the first embodiment according to the invention, the two side limbs or lateral regions of the U-shape can preferably also have a curvature in each case in the direction of the respective other side limb or lateral region, in particular in the region of their ends.

Des Weiteren kann erfindungsgemäss die Einwölbung des Mittelschenkels bzw. mittleren Bereichs der U-Form nach innen spitz zu laufend sein, derart dass sich eine im Wesentlichen V-förmige Einwölbung ergibt deren Spitze in die U-Form zeigt.Furthermore, according to the invention, the concavity of the central limb or middle region of the U-shape can be pointed inwards so that a substantially V-shaped indentation results whose tip points into the U-shape.

Durch diese Ausgestaltungen ergeben sich im weiteren Sinne zwei seitliche Flügel, welche an den Seitenbereichen nach außen gerichtet sind, wodurch zumindest näherungsweise die später gewünschte Batwing-Verteilung nachgeahmt wird.These embodiments result in the broader sense two lateral wings, which are directed to the side regions to the outside, whereby at least approximately the later desired Batwing distribution is imitated.

Die gewünschte Lichtstärkeverteilung der erfindungsgemäßen Anordnung zur Lichtabgabe ergibt sich insgesamt aber dann vorzugsweise aus dem Zusammenwirken des ersten und zweiten optischen Elements, wobei insbesondere eine Lichtstärkeverteilung in Form eines Batwings erreicht wird.The desired luminous intensity distribution of the arrangement according to the invention for emitting light results overall, however, then preferably from the interaction of the first and second optical elements, wherein in particular a light intensity distribution in the form of a Batwing is achieved.

Hierfür kann des Weiteren vorgesehen sein, dass das zweite optische Element der erfindungsgemäßen Anordnung zur Lichtabgabe eine lichtbrechende Charakteristik aufweist, wobei sich die lichtbrechende Charakteristik durch längliche Prismenstrukturen ergeben kann.For this purpose, it can further be provided that the second optical element of the arrangement according to the invention for light emission has a light-refracting characteristic, wherein the refractive characteristic can result from elongated prismatic structures.

Durch die nach innen geneigten bzw. gekrümmten Seitenschenkel bzw. seitlichen Bereiche der U-Form und der lichtstreuenden Charakteristik des ersten optischen Elements ergibt sich zudem der Vorteil, dass die eingeschränkte Lichtabstrahlcharakteristik bzw. Lichtstärkeverteilung der Leuchtdioden nicht mehr zum Tragen kommt, da durch diese Merkmale die Lichtstärkeverteilung entsprechend aufgeweitet bzw. erweitert wird.Due to the inwardly inclined or curved side legs or lateral areas of the U-shape and the light-scattering characteristic of the first optical element, there is also the advantage that the limited light-emitting characteristic or light-intensity distribution of the light-emitting diodes no longer comes into play, as a result of these features the light intensity distribution is widened or expanded accordingly.

Dementsprechend kann bei der erfindungsgemäßen Anordnung zur Lichtabgabe auch vorgesehen sein, dass das zweite optische Element im Querschnitt im Wesentlichen halbkreisförmig ausgestaltet ist, wobei die Leuchtendioden zusammen mit dem ersten optischen Element innerhalb der halbkreisförmigen Ausgestaltung des zweiten optischen Elements angeordnet sein können.Accordingly, it can also be provided in the arrangement for emitting light according to the invention that the second optical element is configured substantially semicircular in cross section, wherein the light emitting diodes can be arranged together with the first optical element within the semicircular configuration of the second optical element.

Hierdurch ergibt sich der Vorteil, dass bei bereits bekannten Leuchten, wie beispielsweise bei der in Figur 1 gezeigten, ein erfindungsgemäßes optisches Element in Verbindung mit Leuchtdioden ohne Weiteres eine Leuchtstofflampe ersetzen kann, wobei es möglich ist, das optische Element und die Leuchtdioden an der gleichen Stelle innerhalb der Leuchte anzuordnen.This has the advantage that in already known lights, such as in the in FIG. 1 shown, an optical element according to the invention in conjunction with LEDs can easily replace a fluorescent lamp, it being possible to arrange the optical element and the LEDs in the same place within the lamp.

Des Weiteren kann vorgesehen sein, dass die erfindungsgemäße Anordnung zur Lichtabgabe ein längliches Trägerelement aufweist, an dem die Enden der Seitenschenkel bzw. seitlichen Bereiche des ersten optischen Elements jeweils verrastbar sind und an dem eine längliche Platine gehalten werden kann, auf der die Leuchtdioden angeordnet sind. Die Platine kann hierbei durch mindestens ein Andrückelement an dem länglichen Trägerelement gehalten werden.Furthermore, it can be provided that the arrangement according to the invention for emitting light has an elongate carrier element, on which the ends of the side legs or lateral areas of the first optical element can each be latched and on which an elongated circuit board can be held, on which the light emitting diodes are arranged , The board can be held by at least one pressing element on the elongated support element.

Vorteilhafterweise können das Trägerelement und/oder das erste optische Element in Längsachse der Anordnung rotierbar sein.Advantageously, the carrier element and / or the first optical element can be rotatable in the longitudinal axis of the arrangement.

Nachfolgend soll die Erfindung anhand von Ausführungsbeispielen und den beiliegenden Zeichnungen näher erläutert werden. Es zeigen:

Figur 1
Darstellung einer Feuchtraumleuchte aus dem Stand der Technik im Querschnitt;
Figur 2
Lichtstärkeverteilung der in Figur 1 gezeigten Leuchte in Leuchtenquerrichtung;
Figur 3
nicht erfindungsgemäßes optisches Element im Querschnitt gemäß einer ersten Ausführungsform;
Figur 4
Lichtstärkeverteilung des in Figur 3 gezeigten länglichen optischen Elements in Elementquerrichtung;
Figur 5
nicht erfindungsgemäße Anordnung zur Lichtabgabe im Querschnitt mit einem optischen Element gemäß Figur 3;
Figur 6
Lichtstärkeverteilung der in Figur 5 gezeigten erfindungsgemäßen Anordnung zur Lichtabgabe in Anordnungsquerrichtung;
Figur 7
nicht erfindungsgemäßes längliches optisches Element mit Trägerelement im Querschnitt ;
Figur 8
erfindungsgemäße Anordnung zur Lichtabgabe im Querschnitt mit einem erfindungsgemäßen optischen Element gemäß einer zweiten Ausführungsform.
The invention will be explained in more detail with reference to embodiments and the accompanying drawings. Show it:
FIG. 1
Representation of a moisture lamp of the prior art in cross section;
FIG. 2
Light intensity distribution of in FIG. 1 shown lamp in transverse direction of the lamp;
FIG. 3
non-inventive optical element in cross section according to a first embodiment;
FIG. 4
Luminous intensity distribution of in FIG. 3 shown elongated optical element in the transverse direction of the element;
FIG. 5
Non-inventive arrangement for emitting light in cross section with an optical element according to FIG. 3 ;
FIG. 6
Light intensity distribution of in FIG. 5 shown arrangement according to the invention for light emission in the arrangement transverse direction;
FIG. 7
non-inventive elongate optical element with carrier element in cross section;
FIG. 8
Arrangement according to the invention for emitting light in cross section with an optical element according to the invention according to a second embodiment.

In Figur 1 ist wie bereits erläutert eine Feuchtraumleuchte 1 dargestellt, die die in Figur 2 gezeigte Lichtstärkeverteilung in der sogenannten C0/C180 Ebene und somit in der Leuchtenquerrichtung, aufweist.In FIG. 1 As already explained, a moisture-proof luminaire 1 is shown, which corresponds to the in FIG. 2 shown light intensity distribution in the so-called C0 / C180 level and thus in the transverse direction of the lamp has.

Figur 3 zeigt ein nicht erfindungsgemäßes längliches optisches Element 5, das im Querschnitt eine im Wesentlichen U-förmige Ausgestaltung mit zwei Seitenschenkeln 6 und einem Mittelschenkel 8 aufweist, wobei, wie aus Figur 3 hervorgeht, die beiden Seitenschenkel 6 des U-förmigen optischen Elements 5 leicht nach innen zueinander geneigt sind, derart dass die Seitenschenkel 6 an ihren Enden 7 einen geringeren Abstand zueinander aufweisen als in dem Bereich in dem die Seitenschenkel 6 in den Mittelschenkel 8 der U-Form übergehen. Zusätzlich ist der die beiden Seitenschenkel 6 miteinander verbindende Mittelschenkel 8 nach innen gewölbt bzw. weist eine Wölbung nach innen auf, wodurch sich an den Übergängen der Seitenschenkel 6 in den Mittelschenkel 8 jeweils seitliche Flügel ergeben. Die Form des erfindungsgemäßen optischen Elements 5 im Querschnitt ähnelt somit im weiteren Sinne der später gewünschten Lichtstärkeverteilung in Form eines Batwings, wobei die Form des optischen Elements 5 nicht identisch mit der Form der Verteilung ist. FIG. 3 shows a non-inventive elongated optical element 5, which has a substantially U-shaped configuration in cross section with two side legs 6 and a middle leg 8, wherein, as shown in FIG FIG. 3 shows that the two side legs 6 of the U-shaped optical element 5 are slightly inclined inwardly towards each other, such that the side legs 6 at their ends 7 have a smaller distance from each other than in the region in which the side legs 6 in the middle leg 8 of the U- shape pass. In addition, the two side legs 6 interconnecting center leg 8 is curved inward or has a curvature inwards, resulting in the transitions of the side legs 6 in the middle leg 8 each side wings. The shape of the optical element 5 according to the invention in cross section thus resembles in a broader sense the later desired light intensity distribution in the form of a batwing, wherein the shape of the optical element 5 is not identical to the shape of the distribution.

Zu dem optischen Element ist des Weiteren noch anzumerken, dass dieses aus einem diffus streuenden Material mit beispielsweise einer Wandstärke von 0,3 mm bestehen kann, wodurch sich eine lichtstreuende Charakteristik des optischen Elements ergibt.It should also be noted in addition to the optical element that this may consist of a diffusely scattering material with, for example, a wall thickness of 0.3 mm, which results in a light-scattering characteristic of the optical element.

Figur 4 zeigt die Lichtstärkeverteilung des in Figur 3 gezeigten optischen Elements 5 in der sogenannten C0/C180 Ebene, also in Elementquerrichtung, wenn an der Öffnung der U-Form des optischen Elements 5 Leuchtdioden angeordnet sind. Hieraus lässt sich erkennen, dass die sehr eingeschränkte Lichtabstrahlcharakteristik bzw. Lichtstärkeverteilung von Leuchtdioden durch das optische Element 5 deutlich aufgeweitet bzw. erweitert wird, was dazu führt, dass das erfindungsgemäße optische Element 5 zusammen mit Leuchtdioden ohne Weiteres eine Leuchtstofflampe ersetzen kann. Diese Aufweitung bzw. Erweiterung ergibt sich insbesondere durch die lichtstreuende Charakteristik, die Einwölbung des Mittelschenkels 8 und die nach innen zueinander geneigten Seitenschenkel 6 der U-Form des erfindungsgemäßen optischen Elements 5. FIG. 4 shows the light intensity distribution of in FIG. 3 shown optical element 5 in the so-called C0 / C180 plane, ie in the transverse direction of the element, when at the opening of the U-shape of the optical element 5 LEDs are arranged. From this it can be seen that the very limited light emission characteristic or light intensity distribution of light-emitting diodes is significantly widened or widened by the optical element 5, which leads to the fact that the optical element 5 according to the invention together with light-emitting diodes can readily replace a fluorescent lamp. This widening or widening results, in particular, from the light-scattering characteristic, the concavity of the middle limb 8 and the side limbs 6, which are inclined towards the inside, of the U-shape of the optical element 5 according to the invention.

In Figur 5 ist nun eine nicht erfindungsgemäße Anordnung zur Lichtabgabe 9 gezeigt, die ein vergleichbares Leuchtengehäuse 3 wie die in Figur 1 gezeigte Leuchte 1 aufweist. Auch das in Figur 5 gezeigte zweite optische Element 2 entspricht dem optischen Element 2 aus Figur 1. Im Gegensatz zur Leuchte 1 in Figur 1 ist in der erfindungsgemäßen Anordnung zur Lichtabgabe 9 nunmehr keine Leuchtstofflampe 4 mehr vorgesehen. Anstelle dieser Leuchtstofflampe 4 kommen in der Anordnung zur Lichtabgabe 9 nun Leuchtdioden 10 zum Einsatz, die in Längsrichtung hintereinander angeordnet sind und auf einer länglichen Platine 11 befestigt werden. Zusätzlich ist bei der Anordnung zur Lichtabgabe 9 ein erstes optisches Element vorgesehen, wobei bei der in Figur 5 gezeigten Anordnung ein nicht erfindungsgemäßes optisches Element 5 entsprechend Figur 3 eingesetzt wird. Die Leuchtdioden 10 bzw. die Platine 11 sind dabei an bzw. in der Öffnung des ersten optischen Elements 5 angeordnet, derart, dass das erste optische Element 5 in Lichtabstrahlrichtung direkt vor den Leuchtdioden 10 angeordnet ist.In FIG. 5 Now, a non-inventive arrangement for emitting light 9 is shown, which is a comparable luminaire housing 3 as in FIG. 1 shown lamp 1 has. Also in FIG. 5 shown second optical element 2 corresponds to the optical element 2 FIG. 1 , In contrast to the light 1 in FIG. 1 is in the inventive arrangement for light output 9 now no fluorescent lamp 4 more provided. Instead of this fluorescent lamp 4, light-emitting diodes 10 are now used in the arrangement for emitting light 9, which are arranged one behind the other in the longitudinal direction and are fastened on an elongated circuit board 11. In addition, in the arrangement for emitting light 9, a first optical element is provided, wherein at the in FIG. 5 shown arrangement according to a non-inventive optical element 5 accordingly FIG. 3 is used. The light-emitting diodes 10 or the circuit board 11 are arranged on or in the opening of the first optical element 5, such that the first optical element 5 is arranged in the light emission direction directly in front of the light-emitting diodes 10.

Wiederum vor dem ersten optischen Element 5 ist das zweite optische Element 2 angeordnet, wodurch auch dieses in Lichtabstrahlrichtung der Leuchtdioden 10 liegt. Das erste optische Element 5 und die Leuchtdioden 10 bzw. die Platine 11 sind nun in der Anordnung zur Lichtabgabe 9 derart angeordnet, dass sie sich in etwa im Bereich der früheren Leuchtstofflampe 4 befinden.Again, in front of the first optical element 5, the second optical element 2 is arranged, whereby this is also in the light emitting direction of the LEDs 10. The first optical element 5 and the light-emitting diodes 10 or the circuit board 11 are now arranged in the arrangement for emitting light 9 such that they are located approximately in the area of the earlier fluorescent lamp 4.

Dementsprechend wird das erste optische Element 5 von dem zweiten optischen Element 2 umgeben, wobei das erste optische Element 5 innerhalb der kreisförmigen Ausgestaltung des zweiten optischen Elements 2 angeordnet ist. Dies wird möglich, da die Lichtabstrahlcharakteristik bzw. Lichtstärkeverteilung der Leuchtdioden verändert wird.Accordingly, the first optical element 5 is surrounded by the second optical element 2, wherein the first optical element 5 is arranged within the circular configuration of the second optical element 2. This becomes possible because the light emission characteristic or light intensity distribution of the light-emitting diodes is changed.

Durch die Kombination des ersten optischen Elements 5, das eine lichtstreuende Charakteristik aufweist und des zweiten optischen Elements 2, das eine lichtbrechende Charakteristik aufweist, ergibt sich dann eine Lichtstärkeverteilung in der sogenannten C0/C180 Ebene, also in Anordnungsquerrichtung, die eine zu der in Figur 2 gezeigten Batwing-Kurve ähnliche Kurve aufweist.The combination of the first optical element 5, which has a light-scattering characteristic, and the second optical element 2, which has a refractive characteristic, then results in a light intensity distribution in the so-called C0 / C180 plane, that is, in the transverse direction of the arrangement FIG. 2 shown Batwing curve has similar curve.

Es ist somit festzuhalten, dass die gewünschte Lichtverteilung durch das Zusammenwirken der beiden optischen Elemente 2 und 5 erzielt wird, wobei es durch das erste erfindungsgemäße optische Element 5 möglich wird, bei einer bereits bestehenden länglichen Leuchte wie sie in Figur 1 dargestellt ist, die Leuchtstofflampe 4 zu ersetzten, ohne dass eine Anpassung des dort gezeigten optischen Elements 2 notwendig ist. Das optische Element 2 in Figur 1, das dem zweiten optischen Element 2 in Figur 5 entspricht, kann somit weiterhin mit einer lichtbrechenden Charakteristik ausgestattet bleiben, die beispielsweise wie bereits erwähnt durch längliche Prismenstrukturen erreicht werden kann.It is thus to be noted that the desired light distribution is achieved by the interaction of the two optical elements 2 and 5, it being possible by the first optical element 5 according to the invention, in an existing elongated luminaire as shown in FIG FIG. 1 is shown to replace the fluorescent lamp 4, without an adjustment of the optical element 2 shown there is necessary. The optical element 2 in FIG. 1 which is the second optical element 2 in FIG. 5 corresponds, it can thus continue to be equipped with a refractive characteristic, which can be achieved, for example, as already mentioned by elongated prismatic structures.

Durch das nicht erfindungsgemäße optische Element 5 ergibt sich somit eine von der Punktform der Leuchtdiode abweichende Lichtquelle, deren Oberfläche der Oberfläche des ersten optischen Elements entspricht, was durch die streuenden Eigenschaften des ersten optischen Elements erzielt wird.The non-inventive optical element 5 thus results in a deviating from the dot shape of the LED light source whose surface corresponds to the surface of the first optical element, which is achieved by the scattering properties of the first optical element.

Zur Montage direkt im Bereich der Leuchtdioden 10 ist auch noch anzumerken, dass hierdurch der Materialeinsatz für das erste optische Element 5, im Vergleich zu einer Lösung im Bereich des zweiten optischen Elements, reduziert wird.For mounting directly in the region of the light emitting diodes 10, it should also be noted that this reduces the material used for the first optical element 5, compared to a solution in the region of the second optical element.

Figur 7 zeigt nun zusätzlich noch ein längliches Trägerelement 12, an dem die Platine 11, auf der die Leuchtdioden 10 angeordnet sind, gehalten wird. Dies erfolgt durch Andrückelemente 13, die mit dem Trägerelement 12 verrastbar sind und einen Druck auf die Platine 11 ausüben, derart dass die Platine 11 gegen eine Oberfläche des Trägerelements 12 gepresst wird und somit an dem Trägerelement 12 gehalten wird. FIG. 7 now additionally shows an elongated support member 12, on which the circuit board 11, on which the light-emitting diodes 10 are arranged, is held. This is done by pressing elements 13 which are latched to the support member 12 and exert pressure on the board 11, such that the board 11 is pressed against a surface of the support member 12 and thus held on the support member 12.

Des Weiteren ist vorgesehen, dass auch das erste optische Element 5 durch das Trägerelement 12 gehalten wird. Hierfür können die beiden Enden 7 der Seitenschenkel 6 der U-Form mit dem Trägerelement 12 verrastet werden, wodurch, wie auch aus Figur 7 ersichtlich, die Leuchtdioden 10 bzw. die Platine 11 durch das erste erfindungsgemäße optische Element 5 vor direkter Berührung geschützt werden können.Furthermore, it is provided that also the first optical element 5 is held by the carrier element 12. For this purpose, the two ends 7 of the side legs 6 of the U-shape can be latched to the support member 12, whereby, as well as from FIG. 7 it can be seen that the LEDs 10 and the board 11 can be protected from direct contact by the first optical element 5 according to the invention.

Das Trägerelement kann beispielsweise aus Aluminium bestehen und einen Kühlkörper aufweisen, der für eine optimierte Wärmeabfuhr sorgt.The support member may for example consist of aluminum and have a heat sink, which ensures optimized heat dissipation.

Des Weiteren ist es vorstellbar, dass das Trägerelement innerhalb einer erfindungsgemäßen Anordnung zur Lichtabgabe um die Längsachse rotierbar angebracht ist. Ebenso könnte auch das erste optische Element um die Längsachse der Anordnung rotierbar angebracht sein.Furthermore, it is conceivable that the carrier element is rotatably mounted within an inventive arrangement for emitting light about the longitudinal axis. Likewise, the first optical element could also be rotatably mounted about the longitudinal axis of the arrangement.

In Figur 8 ist eine erfindungsgemäße Anordnung zur Lichtabgabe 19 gezeigt, die wiederum ein Leuchtengehäuse 3 und ein zweites optische Element 2, vergleichbar mit den in Figur 5 gezeigten, aufweist. Im Gegensatz zur Anordnung zur Lichtabgabe 9 in Figur 5, ist bei der Anordnung zur Lichtabgabe 19 in Figur 8 ein erstes optisches Element 15 gemäß der erfindungsgemäßen Ausführungsform der vorliegenden Erfindung vorgesehen. Dieses erfindungsgemäße längliche optische Element 15 hat ebenfalls eine lichtstreuende Charakteristik und ist auch im Querschnitt im Wesentlichen U-förmig ausgestaltet, wobei es zwei seitliche Bereiche 16 und einen mittleren Bereich 18 aufweist. Hierbei sind die beiden seitlichen Bereiche 16 der U-Form im Bereich ihrer Enden 17 jeweils nach innen in Richtung des jeweils anderen seitlichen Bereichs 16 gekrümmt, wobei diese Krümmung einen ähnlichen Effekt erzielt, wie die Neigung der Seitenschenkel 6 bei dem optischen Element 5 in Figur 3.In FIG. 8 an arrangement according to the invention for emitting light 19 is shown, in turn, a luminaire housing 3 and a second optical element 2, comparable to those in FIG. 5 shown. In contrast to the arrangement for light emission 9 in FIG. 5 , 19 is in the light-emitting arrangement in FIG FIG. 8 a first optical Element 15 according to the embodiment of the present invention provided. This elongated optical element 15 according to the invention also has a light-scattering characteristic and is also designed in a substantially U-shaped cross-section, wherein it has two lateral regions 16 and a central region 18. In this case, the two lateral regions 16 of the U-shape in the region of their ends 17 are each curved inwards in the direction of the respective other lateral region 16, this curvature achieving a similar effect as the inclination of the side limbs 6 in the optical element 5 in FIG FIG. 3 ,

Ebenso wie der Mittelschenkel 8 der ersten Ausführungsform ist auch der mittlere Bereich 18 der zweiten Ausführungsform nach innen gewölbt bzw. weist eine Wölbung nach innen auf, wobei diese nach innen spitz zu laufend ist, wodurch sich eine Einwölbung ergibt, die im Wesentlichen eine V-Form aufweist deren Spitze in die U-Form zeigt.Like the center leg 8 of the first embodiment, the middle area 18 of the second embodiment is also curved inwards or has an inward curvature which is inwardly tapered, resulting in a concavity which is essentially a V-shaped one. Form has the tip in the U-shape.

Die Lichtstärkeverteilung des in Figur 8 gezeigten ersten optischen Elements 15 ähnelt somit der Lichtstärkeverteilung des in Figur 3 gezeigten ersten optischen Elements 9, weshalb die in Figur 8 gezeigte Anordnung zur Lichtabgabe 19 eine vergleichbare Lichtstärkeverteilung bzw. Lichtabstrahlcharakteristik wie die in Figur 5 gezeigte Anordnung zur Lichtabgabe 9 aufweist.The luminous intensity distribution of in FIG. 8 The first optical element 15 shown thus resembles the light intensity distribution of the in FIG. 3 shown first optical element 9, which is why the in FIG. 8 shown arrangement for emitting light 19 a comparable light intensity distribution or light emission characteristic as in FIG. 5 has arrangement shown for emitting light 9.

Außerdem können die Weiteren vorteilhaften Ausgestaltungen, welche im Zusammenhang mit den Figuren 3 und 5 bereits näher erläutert worden sind, auch bei der in Figur 8 gezeigten Ausführungsform entsprechend Anwendung finden.In addition, the further advantageous embodiments, which in connection with the Figures 3 and 5 have already been explained in detail, also in the FIG. 8 shown embodiment according to apply.

Insgesamt ist anzumerken, dass die lichtstreuende Charakteristik des erfindungsgemäßen optischen Elements dazu führt, dass Leuchtdioden in Verbindung mit dem erfindungsgemäßen optischen Element eine Leuchtstofflampe ersetzen können, ohne Veränderungen an der äußeren Struktur einer entsprechenden Leuchte bzw. Anordnung zur Lichtabgabe vorzunehmen.Overall, it should be noted that the light-scattering characteristic of the optical element according to the invention leads to light-emitting diodes in conjunction with the optical element according to the invention can replace a fluorescent lamp, without making changes to the outer structure of a corresponding lamp or arrangement for light output.

Des Weiteren ist es auch vorstellbar, dass bei Leuchten die bisher zwei nebeneinander angeordnete Leuchtstofflampen aufweisen, die Leuchtstofflampen jeweils durch ein erfindungsgemäßes optisches Element und entsprechenden Platinen bzw. Leuchtdioden ersetzt werden, womit dann anstelle der beiden Leuchtstofflampen zwei nebeneinander angeordnete erfindungsgemäße optische Elemente in der Leuchte angeordnet sind. In Verbindung mit der Rotierbarkeit des Trägerelements oder der optischen Elemente ergibt sich dann zusätzlich die Möglichkeit einer Kreuzabstrahlung. Es wäre aber auch denkbar, dass zwei nebeneinander angeordneten Platinen mit Leuchtdioden vorgesehen sind, die von nur einem erfindungsgemäßen optischen Element umgeben sind.Furthermore, it is also conceivable that in the case of luminaires the two fluorescent lamps arranged next to one another have the fluorescent lamps in each case by an optical element according to the invention and corresponding circuit boards or Light-emitting diodes are replaced, which then instead of the two fluorescent lamps two juxtaposed optical elements according to the invention are arranged in the lamp. In conjunction with the rotatability of the carrier element or the optical elements, the possibility of cross-emission then additionally results. But it would also be conceivable that two side by side arranged boards are provided with light-emitting diodes, which are surrounded by only one optical element according to the invention.

Claims (14)

  1. An elongated optical element (15) for light emitting diodes (10) arranged in the longitudinal direction behind each other,
    wherein the optical element (15) has a light-diffusing characteristic and is designed essentially U-shaped in cross section and wherein the center leg or middle area (8) of the U-shape connecting the two side legs or side areas (6) with each other has an indent inwards,
    wherein the two side legs or side areas (6) of the U-shape are inclined inwards relative to each other such that the side legs or side areas (6) have a smaller distance to each other on their ends (7) than in the area, in which the side legs or side areas (6) pass into the center leg or center area (8) of the U-shape,
    characterized in that
    the indent of the center leg or middle area of the U-shape is tapered inwards, such that an essentially V-shaped indent results, the tip of which points into the U-shape.
  2. An optical element according to Claim 1,
    characterized in
    that the two side legs or side areas of the U-shape in each case have a curvature inwards in the direction of the other side leg or side area in each case, in particular, in the area of their ends.
  3. An elongated optical element (15) for light-emitting diodes (10) arranged in the longitudinal direction behind each other,
    wherein the optical element (15) has a light-diffusing characteristic and is designed essentially U-shaped in cross section and wherein the center leg or middle area (8) of the U-shape connecting the two side legs or side areas (6) with each other has an indent inwards,
    wherein the two side legs or side areas of the U-shape in each case have a curvature inwards in the direction of the other side leg or side area in each case, in particular, in the area of their ends,
    characterized in that
    the indent of the center leg or middle area of the U-shape is tapered inwards, in such a way that an essential V-shaped indent results, the tip of which points into the U-shape.
  4. An arrangement for the output of light (19) having
    • A first elongated optical element (15) according to one of the preceding claims
    • A second elongated optical element (2) and
    • Light-emitting diodes (10),
    wherein in the light emission direction of the light-emitting diodes (10) the first optical element (15) is arranged with the opening of the U-shape in the direction of the light-emitting diodes (10) directly in front of the light-emitting diodes (10) and is surrounded by the second optical element (2).
  5. An arrangement according to Claim 4,
    characterized in
    that the second optical element (2) is designed in cross section essentially in a semi-circle, wherein the light-emitting diodes (10) together with the first optical element (15) are arranged within the semi-circular design of the second optical element (2).
  6. An arrangement according to Claim 4 or 5,
    characterized in
    that the light intensity distribution of the arrangement (19) arises as a result of the interaction of the first optical element (15) and the second optical element (2).
  7. An arrangement according to Claim 6,
    characterized in
    that the arrangement (19) essentially has a light intensity distribution in the form of a batwing in the arrangement cross direction.
  8. An arrangement according to one of Claims 4-7,
    characterized in
    that the second optical element (2) has a light-refracting characteristic.
  9. An arrangement according to Claim 8,
    characterized in
    that the second optical element (2) has an elongated prism structure.
  10. An arrangement according to one of Claims 4-9,
    characterized in
    that the light-emitting diodes (10) are arranged on an elongated board (11), which can be held by an elongated support element (12).
  11. An arrangement according to Claim 10,
    characterized in
    that the board (11) can be held by at least one press-on element (13) on the support element (12).
  12. An arrangement according to Claim 10 or 11,
    characterized in
    that the first optical element (15) can be held by the support element (12).
  13. An arrangement according to Claim 12,
    characterized in
    that the ends (7) of the side legs or side areas (6) of the first optical element (15) are in each case lockable with the support element (12).
  14. An arrangement according to one of Claims 10-13,
    characterized in
    that the support element (12) and/or the first optical element (15) are/is rotatable about the longitudinal axis of the arrangement (19).
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EP2518389A3 (en) 2014-01-29
PL2518389T3 (en) 2017-07-31
EP2518389B2 (en) 2020-05-20
DE102011017580B4 (en) 2023-04-06
EP2518389A2 (en) 2012-10-31
DE202012013269U1 (en) 2015-10-14

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