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EP2295851B1 - Light influencing element - Google Patents

Light influencing element Download PDF

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Publication number
EP2295851B1
EP2295851B1 EP10183921.5A EP10183921A EP2295851B1 EP 2295851 B1 EP2295851 B1 EP 2295851B1 EP 10183921 A EP10183921 A EP 10183921A EP 2295851 B1 EP2295851 B1 EP 2295851B1
Authority
EP
European Patent Office
Prior art keywords
light
influencing element
grid elements
light influencing
element according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP10183921.5A
Other languages
German (de)
French (fr)
Other versions
EP2295851A3 (en
EP2295851A2 (en
Inventor
Katharina Keller
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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zumtobel Lighting GmbH Austria filed Critical Zumtobel Lighting GmbH Austria
Publication of EP2295851A2 publication Critical patent/EP2295851A2/en
Publication of EP2295851A3 publication Critical patent/EP2295851A3/en
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Publication of EP2295851B1 publication Critical patent/EP2295851B1/en
Anticipated expiration legal-status Critical
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/002—Refractors for light sources using microoptical elements for redirecting or diffusing light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/02—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using parallel laminae or strips, e.g. of Venetian-blind type
    • 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
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/06—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using crossed laminae or strips, e.g. grid-shaped louvers; using lattices or honeycombs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/02—Refractors for light sources of prismatic shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2105/00—Planar light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y10T428/24364—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.] with transparent or protective coating

Definitions

  • the present invention relates to a light influencing element for directing the light emitted from a light source according to the preamble of the independent claims.
  • the invention relates to a so-called luminaire grid.
  • Screens are known as optical elements for luminaires and are commonly used to concentrate or confine the light emitted by a light source to a predetermined angular range. In this way it can be prevented that persons are blinded by the light emitted by a lamp. Furthermore, disturbing reflections, in particular on vertical surfaces - for example on screens - avoided. Such screens are therefore used in particular in rooms in which there are jobs.
  • Light grids of the type described above usually consist of a regular structure of grid elements with mirrored side walls, which are arranged in front of the light source as seen in the light emission direction. For the desired optical effect of the concentration of the light rays on a given area, a certain ratio between distance and height of the respective grid elements must be maintained.
  • the grid elements in comparison to the light sources usually have a height of several centimeters, usually about 5 cm, wherein the distance between each two grid elements is dimensioned slightly larger. This limits the possibilities of reducing the height of a luminaire.
  • the present invention has for its object to provide a novel light influencing element, which allows a lower height of lights. At the same time, however, the optical properties of a typical lighting grid should be maintained.
  • the object is achieved by a light-influencing element for directing the light emitted by a light source to a predetermined angular range, which is the Having features of the independent claim, solved.
  • the light influencing element according to the invention consists of a plurality of rib-like grid elements, each having reflective side walls and arranged in a regular structure, wherein the light influencing element consists of a transparent bottom plate, on one flat side of the grid elements are arranged.
  • a novel light influencing element is created, which also has the desired lighting properties of a luminaire grid, but gives the luminaire a different appearance.
  • the grid elements consist of a transparent material, wherein at least the side walls and the end faces of the grid elements facing away from the light source are provided with a reflective layer.
  • the grid elements have a height of at most 5 mm, wherein the distance between two grid elements preferably corresponds approximately to twice the height of the grid elements.
  • This configuration thus creates a luminaire grid with miniaturized raster elements, while nevertheless achieving the desired light-directing or light-concentrating properties. Due to the small height of this micro-grid greater freedom in the design of lights. In particular, lights can be achieved with a very low height. In addition, gives such a light influencing element of the lamp and a visually appealing appearance. Furthermore, glare effects are reduced even when viewing the luminaire at angles in which a light emission is to take place.
  • the rib-like webs can take any shape seen in cross section, which allows a light deflection in the desired manner.
  • the webs - as usual in conventional lamp grids - form V-shaped.
  • parabolic or ribbed structures are conceivable.
  • the grid elements are preferably made of a plastic, in particular of PMMA.
  • the grid elements may also be integrally formed with the bottom plate. Alternatively, however, it is also possible to glue the bottom plate with the grid elements.
  • a further transparent plate can be arranged, which not only brings the advantage that the stability is additionally increased, but also enables easier cleaning of the light influencing element.
  • the grid is from the outset better protected against contamination.
  • the grid elements can be arranged parallel next to one another or in a cross-shaped structure. This arrangement is particularly advantageous when elongated fluorescent tubes are used as light sources.
  • annular light sources which are usually gas discharge lamps, can also be used, the raster elements then being e.g. can be arranged as concentric circles.
  • the reflective layer of the side surfaces and the end faces of the raster elements facing away from the light source can be effected, for example, by providing the raster elements with a reflective layer by a vapor deposition method.
  • the light-influencing element itself is preferably produced by injection molding.
  • FIGS. 4a, 4b and 7 shown different light influencing elements, wherein in the FIGS. 4a, 4b and 7 shown light influencing elements are not covered by the scope of the claims, but serve to better understand the invention.
  • FIG. 1 shows as an application example of the present invention, a recessed ceiling light 1 with an elongated light source 4, in which a light-influencing element 6 according to the invention is used.
  • a light-influencing element 6 according to the invention
  • light-influencing elements according to the present invention can also be used in other types of luminaires.
  • the application is not limited to lights with elongate light sources.
  • lamp 1 consists of a box-shaped lamp housing 2, on the bottom side connecting means 3 for the light source 4, in which it is a fluorescent tube, are arranged.
  • the light emitted by the fluorescent lamp 4 is directed by means of a reflector 2 arranged in the housing 2 to the light exit opening of the housing 2 and discharged via this.
  • a light influencing element 6 is arranged at the light exit opening, which effects a concentration of the light beams on the desired area.
  • the light influencing element 6 is only a few millimeters high and thus opens up the possibility of keeping the overall height of the luminaire 1 very low.
  • FIG. 2 shows an enlarged section A of the light influencing element 6 in section.
  • the light-influencing element 6 consists of a transparent bottom plate 9 on the lower flat side of which rib-like raster elements 7 are arranged in a regular structure are.
  • the grid elements 7 are formed as elongated webs and arranged parallel to each other.
  • the concentration of the light beams to the desired angular range is achieved by providing the raster elements 7, which are likewise made of a transparent material, with a reflective layer 8 on their side surfaces and on their end faces.
  • the light rays coming from the light source and passing through the transparent bottom plate 9 are therefore reflected on the side surfaces of the raster elements 7, as in a conventional luminaire raster, so that a light emission is made possible only within a limited angular range.
  • the height H of the grid elements 7 is a maximum of 5 mm, preferably it is about 1 mm.
  • the distance D between two adjacent grid elements 7 may also not be too large.
  • the distance D corresponds approximately to twice the height of a raster element 7.
  • the raster elements 7 can - as in FIG. 2 shown - seen in cross section have a slightly V-shaped form, as is known from conventional light grids. However, it is also possible, as the embodiments in the FIGS. 3a and b show to make the raster elements 7 different. In the example in Fig. 3a the raster elements 7 have a parabolic V-structure, while in Fig. 3b have a special rib structure, which is formed by superimposed, prismatic or wedge-shaped stepped portions 7a. Such rib structures are for example from the AT 308 901 or the EP 0 286 890 A1 known.
  • the grid elements 7 are each integrally connected to the bottom plate 9 consisting of a transparent material.
  • the light influencing element 6 according to the invention consists of a transparent plastic and is produced by injection molding.
  • any type of plastic can be used which allows the formation of a transparent workpiece and is suitable for injection molding. This is preferably PMMA.
  • the side and end faces of the grid elements 7 must be provided with the reflective layer 8. This is preferably done by a vacuum coating method, wherein it should be ensured that the lying between the grid elements 7 surfaces of the bottom plate 6 are not also coated, but continue to allow passage of light.
  • FIGS. 2 and 3 illustrated embodiments The advantage of in the FIGS. 2 and 3 illustrated embodiments is that due to the one-piece design of the bottom plate 9 with the grid elements 7, the light influencing element 6 according to the invention has an increased stability.
  • a further transparent plate 10 can be arranged on the side of the raster elements 7 opposite the bottom plate 9, as in FIG FIG. 3 is shown.
  • the use of this additional transparent plate 10 has the further advantage that penetration of dirt particles into the spaces between two grid elements 7 is avoided.
  • the light influencing element 6 can be cleaned better overall.
  • a light-influencing element 6 is shown, which is formed without a bottom plate.
  • the grid elements 7 are arranged only parallel to each other. Since this results in a significantly lower stability of the entire arrangement, at least one side frame 11 is provided which holds the grid elements 7 together. Also in this case, the light influencing element 6 can be produced by injection molding.
  • the grid elements 7 and the transparent bottom plate 9 are not formed in one piece. Instead, the bottom plate 9 was glued in a later step with the grid elements 7. This also increases the stability of the light influencing element 6.
  • the grid elements consisted of elongated ribs which were arranged parallel to each other. In this way, a glare of the light emitted by the light source can be achieved in one direction.
  • the raster elements can be arranged, for example, in a crossed structure. A similar optical effect can also with the in FIG. 6 shown grid can be achieved.
  • the raster elements consist in this case of annular structures 12 which are arranged in a honeycomb pattern.
  • the diameter of a single ring structure is again preferably about 2 mm and, moreover, can also be significantly lower.
  • ring-like structures is particularly suitable when a point light source - for example, a light bulb - is used and the light influencing element has a square or circular shape.
  • the inner sides of the ring structures 12 are in turn provided with a reflective layer.
  • An alternative embodiment which is particularly applicable to annular light sources, e.g. offers correspondingly shaped gas discharge lamps, may also be to form the grid elements as a concentrically arranged rings. Also in these embodiments, the light influencing element 6 can be created with a very low height.
  • each of the illustrated exemplary embodiments can be used as a light influencing element.
  • the luminous means consists of a bottom plate 13, to the grid elements 7 side facing individual light sources 14 are arranged.
  • These light sources 14, which consist for example of an organic material or inorganic semiconductor material which emits light when an electrical voltage is applied, have very small dimensions and can therefore be arranged with respect to the light influencing element 6 so that they emit their light almost exclusively into the free space between the raster elements 7 radiate.
  • the efficiency of the luminaire formed in this way is - since the light sources 14 only cover the gap between two grid elements 7 - optimized.
  • other flat bulbs can be used, in turn, to optimize the efficiency, the tops of the grid elements 7 preferably assigned to areas of the bulb are those who do not emit light.
  • the embodiment shown here enables the realization of a special flat light, since in addition to the light influencing element and the light source has a very low height.
  • the present invention thus offers the possibility of achieving light bundling of the light emitted by a light source with an optical element having a very small height.
  • an optical element having a very small height As a result, on the one hand, greater freedom in the design of a lamp.
  • the luminaire is given a visually pleasing appearance, while still obtaining the desired photometric properties.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Planar Illumination Modules (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
  • Road Signs Or Road Markings (AREA)

Description

Die vorliegende Erfindung betrifft ein Lichtbeeinflussungselement zum Lenken des von einer Lichtquelle abgegebenen Lichts gemäß dem Oberbegriff der unabhängigen Ansprüche. Insbesondere betrifft die Erfindung ein sogenanntes Leuchtenraster.The present invention relates to a light influencing element for directing the light emitted from a light source according to the preamble of the independent claims. In particular, the invention relates to a so-called luminaire grid.

Raster sind als optische Elemente für Leuchten bekannt und werden üblicherweise dazu verwendet, das von einer Lichtquelle abgegebene Licht auf einen vorgegebenen Winkelbereich zu konzentrieren bzw. zu beschränken. Hierdurch kann verhindert werden, dass Personen durch das von einer Leuchte abgegebene Licht geblendet werden. Ferner werden störende Reflexionen insbesondere an senkrecht stehenden Flächen - beispielsweise an Bildschirmen - vermieden. Derartige Raster kommen daher insbesondere in Räumen zum Einsatz, in denen sich Arbeitsplätze befinden.Screens are known as optical elements for luminaires and are commonly used to concentrate or confine the light emitted by a light source to a predetermined angular range. In this way it can be prevented that persons are blinded by the light emitted by a lamp. Furthermore, disturbing reflections, in particular on vertical surfaces - for example on screens - avoided. Such screens are therefore used in particular in rooms in which there are jobs.

Leuchtenraster der oben beschriebenen Art bestehen üblicherweise aus einer regelmäßigen Struktur von Rasterelementen mit verspiegelten Seitenwänden, die in Lichtabstrahlrichtung gesehen vor der Lichtquelle angeordnet sind. Für den gewünschten optischen Effekt der Konzentration der Lichtstrahlen auf einen vorgegebenen Bereich muss ein bestimmtes Verhältnis zwischen Abstand und Höhe der jeweiligen Rasterelemente eingehalten werden.Light grids of the type described above usually consist of a regular structure of grid elements with mirrored side walls, which are arranged in front of the light source as seen in the light emission direction. For the desired optical effect of the concentration of the light rays on a given area, a certain ratio between distance and height of the respective grid elements must be maintained.

Ein typisches Raster der oben beschriebenen Art ist beispielsweise aus der US 6,139,169 bekannt. Wie in dieser Veröffentlichung dargestellt ist, weisen die Rasterelemente im Vergleich zu den Lichtquellen üblicherweise eine Höhe von mehreren Zentimetern, in der Regel etwa 5 cm auf, wobei der Abstand zwischen jeweils zwei Rasterelementen etwas größer bemessen ist. Hierdurch sind die Möglichkeiten, die Bauhöhe einer Leuchte zu reduzieren, begrenzt.A typical grid of the type described above, for example, from US 6,139,169 known. As shown in this publication, the grid elements in comparison to the light sources usually have a height of several centimeters, usually about 5 cm, wherein the distance between each two grid elements is dimensioned slightly larger. This limits the possibilities of reducing the height of a luminaire.

Aus der EP 0 903 535 A2 , der US 2 143 148 A , der US 2 242 872 A und der US 2002/048168 A1 sind ebenfalls Raster- bzw. Lamellenanordnungen bekannt.From the EP 0 903 535 A2 , of the US 2 143 148 A , of the US 2 242 872 A and the US 2002/048168 A1 are also grid or lamellar arrangements known.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein neuartiges Lichtbeeinflussungselement zu schaffen, welches eine geringere Bauhöhe von Leuchten ermöglicht. Gleichzeitig sollen allerdings die optischen Eigenschaften eines typischen Leuchtenrasters beibehalten werden.The present invention has for its object to provide a novel light influencing element, which allows a lower height of lights. At the same time, however, the optical properties of a typical lighting grid should be maintained.

Die Aufgabe wird durch ein Lichtbeeinflussungselement zum Lenken des von einer Lichtquelle abgegebenen Lichts auf einen vorgegebenen Winkelbereich, welches die Merkmale des unabhängigen Anspruchs aufweist, gelöst. Wie ein typisches Leuchtenraster besteht das erfindungsgemäße Lichtbeeinflussungselement aus einer Vielzahl von rippenartigen Rasterelementen, die jeweils reflektierende Seitenwände aufweisen und in einer regelmäßigen Struktur angeordnet sind, wobei das Lichtbeeinflussungselement aus einer transparenten Bodenplatte besteht, an deren einen Flachseite die Rasterelemente angeordnet sind. Hierdurch wird ein neuartiges Lichtbeeinflussungselement geschaffen, welches ebenfalls die gewünschten lichttechnischen Eigenschaften eines Leuchtenrasters aufweist, allerdings der Leuchte ein anderes Aussehen verleiht. Des Weiteren ist auch vorgesehen, dass die Rasterelemente aus einem transparenten Material bestehen, wobei zumindest die Seitenwände sowie die der Lichtquelle abgewandten Stirnflächen der Rasterelemente mit einer reflektierenden Schicht versehen sind.The object is achieved by a light-influencing element for directing the light emitted by a light source to a predetermined angular range, which is the Having features of the independent claim, solved. Like a typical luminaire grid, the light influencing element according to the invention consists of a plurality of rib-like grid elements, each having reflective side walls and arranged in a regular structure, wherein the light influencing element consists of a transparent bottom plate, on one flat side of the grid elements are arranged. As a result, a novel light influencing element is created, which also has the desired lighting properties of a luminaire grid, but gives the luminaire a different appearance. Furthermore, it is also provided that the grid elements consist of a transparent material, wherein at least the side walls and the end faces of the grid elements facing away from the light source are provided with a reflective layer.

Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.Further developments of the invention are the subject of the dependent claims.

Vorzugsweise weisen die Rasterelemente eine Höhe von maximal 5 mm auf, wobei der Abstand zwischen zwei Rasterelementen vorzugsweise etwa dem Doppelten der Höhe der Rasterelemente entspricht.Preferably, the grid elements have a height of at most 5 mm, wherein the distance between two grid elements preferably corresponds approximately to twice the height of the grid elements.

Durch diese Ausgestaltung wird somit ein Leuchtenraster mit miniaturisierten Rasterelementen geschaffen, wobei dennoch die gewünschten lichtlenkenden bzw. lichtkonzentrierenden Eigenschaften erzielt werden. Aufgrund der geringen Höhe dieses Mikrorasters bestehen größere Freiheiten bei der Gestaltung von Leuchten. Insbesondere können Leuchten mit einer sehr geringen Bauhöhe erzielt werden. Darüber hinaus verleiht das ein derartiges Lichtbeeinflussungselement der Leuchte auch ein optisch ansprechendes Aussehen. Ferner werden Blendeffekte selbst bei einer Betrachtung der Leuchte unter Winkeln, in die eine Lichtabstrahlung erfolgen soll, reduziert.This configuration thus creates a luminaire grid with miniaturized raster elements, while nevertheless achieving the desired light-directing or light-concentrating properties. Due to the small height of this micro-grid greater freedom in the design of lights. In particular, lights can be achieved with a very low height. In addition, gives such a light influencing element of the lamp and a visually appealing appearance. Furthermore, glare effects are reduced even when viewing the luminaire at angles in which a light emission is to take place.

Die rippenartigen Stege können im Querschnitt gesehen jede Form annehmen, die eine Lichtlenkung in der gewünschten Weise ermöglicht. Beispielsweise besteht die Möglichkeit, die Stege - wie bei herkömmlichen Leuchtenrastern üblich - V-förmig auszubilden. Daneben sind allerdings auch parabelförmige oder gerippte Strukturen denkbar.The rib-like webs can take any shape seen in cross section, which allows a light deflection in the desired manner. For example, it is possible, the webs - as usual in conventional lamp grids - form V-shaped. In addition, however, parabolic or ribbed structures are conceivable.

Die Rasterelemente bestehen vorzugsweise aus einem Kunststoff, insbesondere aus PMMA.The grid elements are preferably made of a plastic, in particular of PMMA.

Die Rasterelemente können außerdem auch einstückig mit der Bodenplatte ausgebildet sein. Alternativ dazu besteht allerdings auch die Möglichkeit, die Bodenplatte mit den Rasterelementen zu verkleben.The grid elements may also be integrally formed with the bottom plate. Alternatively, however, it is also possible to glue the bottom plate with the grid elements.

Auf der der Bodenplatte gegenüberliegenden Seite der Rasterelemente kann eine weitere transparente Platte angeordnet werden, was nicht nur den Vorteil mit sich bringt, dass die Stabilität zusätzlich erhöht wird, sondern auch ein einfacheres Reinigen des Lichtbeeinflussungselements ermöglicht. Darüber hinaus ist das Raster von vornherein besser gegen Verschmutzungen geschützt.On the opposite side of the bottom plate of the raster elements, a further transparent plate can be arranged, which not only brings the advantage that the stability is additionally increased, but also enables easier cleaning of the light influencing element. In addition, the grid is from the outset better protected against contamination.

Die Rasterelemente können wie die Lamellen eines herkömmlichen Leuchtenrasters parallel nebeneinander oder in einer Kreuzstruktur angeordnet sein. Diese Anordnung ist insbesondere dann von Vorteil, wenn als Lichtquellen längliche Leuchtstoffröhren verwendet werden. Darüber hinaus besteht allerdings auch die Möglichkeit, die Rasterelemente ringförmig auszubilden und die einzelnen Ringe in einem Wabenmuster anzuordnen. Diese Anordnung bietet sich insbesondere bei punktförmigen Lichtquellen, wie beispielsweise bei Glühbirnen, oder bei flächigen Lichtquellen an. Ferner können auch ringförmige Lichtquellen - hierbei handelt es sich in der Regel um Gasentladungslampen - verwendet werden, wobei die Rasterelemente dann z.B. als konzentrische Kreise angeordnet sein können.The grid elements, like the slats of a conventional lighting grid, can be arranged parallel next to one another or in a cross-shaped structure. This arrangement is particularly advantageous when elongated fluorescent tubes are used as light sources. In addition, however, it is also possible to form the raster elements annular and to arrange the individual rings in a honeycomb pattern. This arrangement is particularly suitable for punctiform light sources, such as light bulbs, or in flat light sources. Furthermore, annular light sources, which are usually gas discharge lamps, can also be used, the raster elements then being e.g. can be arranged as concentric circles.

Die reflektierende Schicht der Seitenflächen und der der Lichtquelle abgewandten Stirnflächen der Rasterelemente kann beispielsweise dadurch erfolgen, dass die Rasterelemente durch ein Bedampfungsverfahren mit einer reflektierenden Schicht versehen werden. Das Lichtbeeinflussungselement selbst wird vorzugsweise im Spritzgießverfahren hergestellt.The reflective layer of the side surfaces and the end faces of the raster elements facing away from the light source can be effected, for example, by providing the raster elements with a reflective layer by a vapor deposition method. The light-influencing element itself is preferably produced by injection molding.

Nachfolgend soll die Erfindung anhand der beiliegenden Zeichnung näher erläutert werden. Es zeigen:

  • Fig. 1 eine Leuchte mit einem erfindungsgemäßen Lichtbeeinflussungselement im Schnitt;
  • Fig. 2 eine vergrößerte Darstellung eines ersten Ausführungsbeispiels eines erfindungsgemäßen Lichtbeeinflussungselements;
  • Fig. 3a und b Varianten eines zweites Ausführungsbeispiels eines erfindungsgemäßen Lichtbeeinflussungselements;
  • Fig. 4 a und b ein drittes Ausführungsbeispiel eines nicht erfindungsgemäßen Lichtbeeinflussungselements in perspektivischer Ansicht;
  • Fig. 5 ein viertes Ausführungsbeispiel eines erfindungsgemäßen Lichtbeeinflussungselements;
  • Fig. 6 mehrere ringförmige Rasterelemente; und
  • Fig. 7 das Zusammenwirken eines nicht erfindungsgemäßen Lichtbeeinflussungselements mit einem besonders gestalteten flächigen Leuchtmittel.
The invention will be explained in more detail with reference to the accompanying drawings. Show it:
  • Fig. 1 a lamp with a light influencing element according to the invention in section;
  • Fig. 2 an enlarged view of a first embodiment of a light influencing element according to the invention;
  • Fig. 3a and b Variants of a second embodiment of a light influencing element according to the invention;
  • Fig. 4 a and b a third embodiment of a non-inventive light influencing element in a perspective view;
  • Fig. 5 A fourth embodiment of a light influencing element according to the invention;
  • Fig. 6 a plurality of annular raster elements; and
  • Fig. 7 the interaction of a non-inventive light influencing element with a specially designed flat illuminant.

In den Figuren 1-7 sind verschiedene Lichtbeeinflussungselemente gezeigt, wobei die in den Figuren 4a, 4b und 7 gezeigten Lichtbeeinflussungselemente nicht unter den Schutzumfang der Ansprüche fallen, jedoch der besseren Verständlichkeit der Erfindung dienen.In the Figures 1-7 are shown different light influencing elements, wherein in the FIGS. 4a, 4b and 7 shown light influencing elements are not covered by the scope of the claims, but serve to better understand the invention.

Figur 1 zeigt als Anwendungsbeispiel der vorliegenden Erfindung eine Deckeneinbauleuchte 1 mit einer länglichen Lichtquelle 4, bei der ein erfindungsgemäßes Lichtbeeinflussungselement 6 zum Einsatz kommt. Selbstverständlich allerdings können Lichtbeeinflussungselemente gemäß der vorliegenden Erfindung auch bei anderen Leuchtentypen zum Einsatz kommen. Insbesondere ist die Anwendung nicht auf Leuchten mit länglichen Lichtquellen beschränkt. FIG. 1 shows as an application example of the present invention, a recessed ceiling light 1 with an elongated light source 4, in which a light-influencing element 6 according to the invention is used. Of course, however, light-influencing elements according to the present invention can also be used in other types of luminaires. In particular, the application is not limited to lights with elongate light sources.

Die in Figur 1 dargestellte Leuchte 1 besteht aus einem kastenförmigen Leuchtengehäuse 2, an dessen Bodenseite Anschlussmittel 3 für die Lichtquelle 4, bei der es sich um eine Leuchtstoffröhre handelt, angeordnet sind. Das von der Leuchtstofflampe 4 abgegebene Licht wird mit Hilfe eines in dem Gehäuse 2 angeordneten Reflektors 5 zu der Lichtaustrittsöffnung des Gehäuses 2 gelenkt und über diese abgegeben.In the FIG. 1 illustrated lamp 1 consists of a box-shaped lamp housing 2, on the bottom side connecting means 3 for the light source 4, in which it is a fluorescent tube, are arranged. The light emitted by the fluorescent lamp 4 is directed by means of a reflector 2 arranged in the housing 2 to the light exit opening of the housing 2 and discharged via this.

Um die direkt von der Lampe 4 oder über den Reflektor 5 zu der Lichtaustrittsöffnung gelangenden Lichtstrahlen auf einen vorgegebenen Winkelbereich zu konzentrieren bzw. einzuschränken, ist an der Lichtaustrittsöffnung ein Lichtbeeinflussungselement 6 angeordnet, das eine Konzentration der Lichtstrahlen auf den gewünschten Bereich bewirkt. Das Lichtbeeinflussungselement 6 ist nur wenige Millimeter hoch und eröffnet damit die Möglichkeit, die Bauhöhe der Leuchte 1 sehr gering zu halten.In order to concentrate or restrict the light beams reaching the light exit opening directly from the lamp 4 or via the reflector 5 to a predetermined angular range, a light influencing element 6 is arranged at the light exit opening, which effects a concentration of the light beams on the desired area. The light influencing element 6 is only a few millimeters high and thus opens up the possibility of keeping the overall height of the luminaire 1 very low.

Figur 2 zeigt einen vergrößerten Ausschnitt A des Lichtbeeinflussungselements 6 im Schnitt. Bei diesem ersten Ausführungsbeispiel besteht das Lichtbeeinflussungselement 6 aus einer transparenten Bodenplatte 9 an deren unteren Flachseite rippenartige Rasterelemente 7 in einer regelmäßigen Struktur angeordnet sind. Im vorliegenden Beispiel sind die Rasterelemente 7 als längliche Stege ausgebildet und parallel zueinander angeordnet. Die Konzentration der Lichtstrahlen auf den gewünschten Winkelbereich wird dadurch erzielt, dass die ebenfalls aus einem transparenten Material bestehenden Rasterelemente 7 an ihren Seitenflächen sowie an ihren Stirnflächen mit einer reflektierenden Schicht 8 versehen sind. Die von der Lichtquelle kommenden und durch die transparenten Bodenplatte 9 hindurchtretenden Lichtstrahlen werden daher - wie bei einem gewöhnlichen Leuchtenraster - an den Seitenflächen der Rasterelemente 7 reflektiert, so dass eine Lichtabstrahlung nur in einem begrenzten Winkelbereich ermöglicht wird. FIG. 2 shows an enlarged section A of the light influencing element 6 in section. In this first exemplary embodiment, the light-influencing element 6 consists of a transparent bottom plate 9 on the lower flat side of which rib-like raster elements 7 are arranged in a regular structure are. In the present example, the grid elements 7 are formed as elongated webs and arranged parallel to each other. The concentration of the light beams to the desired angular range is achieved by providing the raster elements 7, which are likewise made of a transparent material, with a reflective layer 8 on their side surfaces and on their end faces. The light rays coming from the light source and passing through the transparent bottom plate 9 are therefore reflected on the side surfaces of the raster elements 7, as in a conventional luminaire raster, so that a light emission is made possible only within a limited angular range.

Die Höhe H der Rasterelemente 7 beträgt maximal 5 mm, vorzugsweise beträgt sie etwa 1 mm. Um die Konzentration der Lichtstrahlen auf den gewünschten Winkelbereich sicherzustellen, darf der Abstand D zwischen zwei benachbarten Rasterelementen 7 ebenfalls nicht zu groß sein. Vorzugsweise entspricht der Abstand D in etwa dem Doppelten der Höhe eines Rasterelements 7.The height H of the grid elements 7 is a maximum of 5 mm, preferably it is about 1 mm. In order to ensure the concentration of the light beams on the desired angular range, the distance D between two adjacent grid elements 7 may also not be too large. Preferably, the distance D corresponds approximately to twice the height of a raster element 7.

Es ist sogar unter Ausnutzung von Lithographietechniken möglich, die Höhe H und Abstände D der Rasterelemente 7 im Vergleich zu den oben angegebenen Werten nochmals deutlich zu reduzieren und zwar bis in den Bereich von etwa 20 µm für die Höhe H und dementsprechend etwa 40 µm für den Rasterelement-Abstand D. Durch die geringen Abmessungen der Rasterelemente 7 kann die Bauhöhe des Lichtbeeinflussungselements 6 und damit die Höhe der Leuchte 1 insgesamt deutlich reduziert werden. Dennoch wird der gewünschte optische Effekt der Lichtkonzentration erzielt. Der geringe Abstand zwischen zwei benachbarten Rasterelementen 7 hat ferner im Vergleich zu herkömmlichen Rastern selbst unter Blickwinkeln, in die eine Lichtabstrahlung erfolgen soll, eine zusätzliche Entblendung zur Folge. Darüber hinaus wird das Aussehen der Leuchte insgesamt positiv beeinflusst.It is even possible, using lithography techniques, to significantly reduce the height H and distances D of the raster elements 7 in comparison with the values given above, namely up to the range of about 20 μm for the height H and accordingly about 40 μm for the Grid element distance D. Due to the small dimensions of the grid elements 7, the overall height of the light influencing element 6 and thus the height of the lamp 1 can be significantly reduced overall. Nevertheless, the desired optical effect of the light concentration is achieved. The small distance between two adjacent grid elements 7 also has an additional glare reduction compared to conventional grids even at viewing angles into which a light emission is to take place. In addition, the overall appearance of the light is positively influenced.

Die Rasterelemente 7 können - wie in Figur 2 dargestellt - im Querschnitt gesehen eine leicht V-fömige Form aufweisen, wie dies von herkömmlichen Leuchtenrastern bekannt ist. Allerdings besteht auch die Möglichkeit, wie die Ausführungsbeispiele in den Figuren 3a und b zeigen, die Rasterelemente 7 anders zu gestalten. Bei dem Beispiel in Fig. 3a weisen die Rasterelemente 7 eine parabelförmige V-Struktur auf, während sie in Fig. 3b eine besondere Rippenstruktur aufweisen, die durch übereinander angeordnete, prismatisch oder keilförmig abgestufte Abschnitte 7a gebildet wird. Derartige Rippenstrukturen sind beispielsweise aus der AT 308 901 oder der EP 0 286 890 A1 bekannt.The raster elements 7 can - as in FIG. 2 shown - seen in cross section have a slightly V-shaped form, as is known from conventional light grids. However, it is also possible, as the embodiments in the FIGS. 3a and b show to make the raster elements 7 different. In the example in Fig. 3a the raster elements 7 have a parabolic V-structure, while in Fig. 3b have a special rib structure, which is formed by superimposed, prismatic or wedge-shaped stepped portions 7a. Such rib structures are for example from the AT 308 901 or the EP 0 286 890 A1 known.

Bei den Ausführungsbeispielen in Figur 2 und Figur 3a, b sind die Rasterelemente 7 jeweils einstückig mit der aus einem transparenten Material bestehenden Bodenplatte 9 verbunden. Dies bietet sich insbesondere dann an, wenn das erfindungsgemäße Lichtbeeinflussungselement 6 aus einem transparenten Kunststoff besteht und im Spritzgießverfahren hergestellt wird. Zum Spritzgießen kann jede Art von Kunststoff verwendet werden, der die Bildung eines transparenten Werkstücks ermöglicht und sich zum Spritzgießen eignet. Vorzugsweise handelt es sich hierbei um PMMA.In the embodiments in FIG. 2 and FIG. 3a, b the grid elements 7 are each integrally connected to the bottom plate 9 consisting of a transparent material. This is particularly appropriate when the light influencing element 6 according to the invention consists of a transparent plastic and is produced by injection molding. For injection molding, any type of plastic can be used which allows the formation of a transparent workpiece and is suitable for injection molding. This is preferably PMMA.

Nach dem Erstellen des Kunststoffstücks müssen die Seiten- und Stirnflächen der Rasterelemente 7 mit der reflektierenden Schicht 8 versehen werden. Dies erfolgt vorzugsweise durch ein Vakuumbeschichtungsverfahren, wobei darauf zu achten ist, dass die zwischen den Rasterelementen 7 liegenden Flächen der Bodenplatte 6 nicht ebenfalls beschichtet werden, sondern weiterhin einen Lichtdurchtritt ermöglichen.After creating the plastic piece, the side and end faces of the grid elements 7 must be provided with the reflective layer 8. This is preferably done by a vacuum coating method, wherein it should be ensured that the lying between the grid elements 7 surfaces of the bottom plate 6 are not also coated, but continue to allow passage of light.

Der Vorteil der in den Figuren 2 und 3 dargestellten Ausführungsbeispiele besteht darin, dass aufgrund der einstückigen Ausgestaltung der Bodenplatte 9 mit den Rasterelementen 7 das erfindungsgemäße Lichtbeeinflussungselement 6 eine erhöhte Stabilität aufweist. Um diese Stabilität zusätzlich zu erhöhen, kann an der der Bodenplatte 9 gegenüberliegenden Seite der Rasterelemente 7 eine weitere transparente Platte 10 angeordnet werden, wie in Figur 3 dargestellt ist. Die Verwendung dieser zusätzlichen transparenten Platte 10 bringt den weiteren Vorteil mit sich, dass ein Eindringen von Schmutzpartikeln in die Zwischenräume zwischen zwei Rasterelementen 7 vermieden wird. Darüber hinaus kann das Lichtbeeinflussungselement 6 insgesamt besser gereinigt werden.The advantage of in the FIGS. 2 and 3 illustrated embodiments is that due to the one-piece design of the bottom plate 9 with the grid elements 7, the light influencing element 6 according to the invention has an increased stability. In order to additionally increase this stability, a further transparent plate 10 can be arranged on the side of the raster elements 7 opposite the bottom plate 9, as in FIG FIG. 3 is shown. The use of this additional transparent plate 10 has the further advantage that penetration of dirt particles into the spaces between two grid elements 7 is avoided. In addition, the light influencing element 6 can be cleaned better overall.

In den Figuren 4 a und 4 b ist ein Lichtbeeinflussungselement 6 dargestellt, welches ohne Bodenplatte ausgebildet ist. In diesem Fall sind die Rasterelemente 7 lediglich parallel nebeneinander angeordnet. Da sich hierdurch eine deutlich niedrigere Stabilität der gesamten Anordnung ergibt, ist zumindest ein seitlicher Rahmen 11 vorgesehen, der die Rasterelemente 7 zusammenhält. Auch in diesem Fall kann das Lichtbeeinflussungselement 6 im Spritzgießverfahren hergestellt werden.In the FIGS. 4 a and 4 b, a light-influencing element 6 is shown, which is formed without a bottom plate. In this case, the grid elements 7 are arranged only parallel to each other. Since this results in a significantly lower stability of the entire arrangement, at least one side frame 11 is provided which holds the grid elements 7 together. Also in this case, the light influencing element 6 can be produced by injection molding.

Bei dem in Figur 5 dargestellten weiteren Ausführungsbeispiel sind die Rasterelemente 7 und die transparente Bodenplatte 9 nicht einstückig ausgebildet. Statt dessen wurde die Bodenplatte 9 in einem späteren Schritt mit den Rasterelementen 7 verklebt. Auch hierdurch wird die Stabilität des Lichtbeeinflussungselements 6 erhöht.At the in FIG. 5 illustrated further embodiment, the grid elements 7 and the transparent bottom plate 9 are not formed in one piece. Instead, the bottom plate 9 was glued in a later step with the grid elements 7. This also increases the stability of the light influencing element 6.

Bei allen bislang dargestellten Ausführungsbeispielen bestanden die Rasterelemente aus länglichen Rippen, die parallel zueinander angeordnet waren. Hierdurch kann eine Entblendung des von der Lichtquelle abgegebenen Lichts in eine Richtung erzielt werden. Um eine Entblendung in einer weiteren - quer dazu angeordneten Richtung - zu erzielen, können die Rasterelemente beispielsweise in einer gekreuzten Struktur angeordnet werden. Ein hierzu gleichartiger optischer Effekt kann auch mit dem in Figur 6 dargestellten Raster erzielt werden. Die Rasterelemente bestehen in diesem Fall aus ringförmigen Strukturen 12, die in einem Wabenmuster angeordnet sind. Der Durchmesser einer einzelnen Ringstruktur beträgt wiederum vorzugsweise etwa 2 mm und kann darüber hinaus auch deutlich niedriger sein.In all embodiments shown so far, the grid elements consisted of elongated ribs which were arranged parallel to each other. In this way, a glare of the light emitted by the light source can be achieved in one direction. In order to achieve glare reduction in a further direction arranged transversely thereto, the raster elements can be arranged, for example, in a crossed structure. A similar optical effect can also with the in FIG. 6 shown grid can be achieved. The raster elements consist in this case of annular structures 12 which are arranged in a honeycomb pattern. The diameter of a single ring structure is again preferably about 2 mm and, moreover, can also be significantly lower.

Die Verwendung von ringartigen Strukturen bietet sich insbesondere dann an, wenn eine punktförmige Lichtquelle - beispielsweise eine Glühbirne - verwendet wird und das Lichtbeeinflussungselement eine quadratische oder kreisrunde Form aufweist. Um die gewünschte Lichtbündelung zu erzielen, sind zumindest die Innenseiten der Ringstrukturen 12 wiederum mit einer reflektierenden Schicht versehen. Eine hierzu alternative Ausführungsform, die sich insbesondere bei ringförmigen Lichtquellen wie z.B. entsprechend geformten Gasentladungslampen anbietet, kann auch darin bestehen, die Rasterelemente als konzentrisch angeordnete Ringe auszubilden. Auch bei diesen Ausführungsbeispielen kann das Lichtbeeinflussungselement 6 mit einer sehr geringen Bauhöhe erstellt werden.The use of ring-like structures is particularly suitable when a point light source - for example, a light bulb - is used and the light influencing element has a square or circular shape. In order to achieve the desired light bundling, at least the inner sides of the ring structures 12 are in turn provided with a reflective layer. An alternative embodiment which is particularly applicable to annular light sources, e.g. offers correspondingly shaped gas discharge lamps, may also be to form the grid elements as a concentrically arranged rings. Also in these embodiments, the light influencing element 6 can be created with a very low height.

Daneben können auch flächige Leuchtmittel verwendet werden, wobei jedes der dargestellten Ausführungsbeispiele als Lichtbeeinflussungselement verwendet werden kann. Eine besondere Kombination zwischen einem flächenartigen Leuchtmittel, das beispielsweise aus der WO 99/40364 A1 der Anmelderin bekannt ist, und einem Lichtbeeinflussungselement ist in Fig. 7 dargestellt. Hierbei besteht das Leuchtmittel aus einer Bodenplatte 13, an deren den Rasterelementen 7 zugewandten Seitenfläche einzelne Lichtquellen 14 angeordnet sind. Diese Lichtquellen 14, die beispielsweise aus einem organischen Material oder anorganischen Halbleitermaterial bestehen, das bei Anlegen einer elektrischen Spannung Licht emittiert, weisen sehr geringe Abmessungen auf und können daher bezüglich des Lichtbeeinflussungselements 6 derart angeordnet werden, dass sie ihr Licht nahezu ausschließlich in den Freiraum zwischen den Rasterelementen 7 strahlen. Der Wirkungsgrad der auf diese Weise gebildeten Leuchte wird - da die Lichtquellen 14 lediglich den Zwischenraum zwischen zwei Rasterelementen 7 überdecken - optimiert. Selbstverständlich können auch andere flächige Leuchtmittel verwendet werden, wobei wiederum zur Optimierung des Wirkungsgrades die Oberseiten der Rasterelemente 7 bevorzugt Bereichen des Leuchtmittels zugeordnet
sind, die nicht Licht abstrahlen. Das hier dargestellte Ausführungsbeispiels ermöglicht die Realisierung einer besonderes flachen Leuchte, da neben dem Lichtbeeinflussungselement auch die Lichtquelle eine sehr geringe Höhe aufweist.In addition, flat illuminants can also be used, wherein each of the illustrated exemplary embodiments can be used as a light influencing element. A special combination between a sheet-like light source, for example, from the WO 99/40364 A1 the applicant is known, and a light influencing element is in Fig. 7 shown. In this case, the luminous means consists of a bottom plate 13, to the grid elements 7 side facing individual light sources 14 are arranged. These light sources 14, which consist for example of an organic material or inorganic semiconductor material which emits light when an electrical voltage is applied, have very small dimensions and can therefore be arranged with respect to the light influencing element 6 so that they emit their light almost exclusively into the free space between the raster elements 7 radiate. The efficiency of the luminaire formed in this way is - since the light sources 14 only cover the gap between two grid elements 7 - optimized. Of course, other flat bulbs can be used, in turn, to optimize the efficiency, the tops of the grid elements 7 preferably assigned to areas of the bulb
are those who do not emit light. The embodiment shown here enables the realization of a special flat light, since in addition to the light influencing element and the light source has a very low height.

Die vorliegende Erfindung eröffnet somit die Möglichkeit, eine Lichtbündelung des von einer Lichtquelle abgegebenen Lichts mit einem optischen Element, das eine sehr geringe Höhe aufweist, zu erzielen. Hierdurch bestehen zum Einen größere Freiheiten bei der Gestaltung einer Leuchte. Zum anderen wird der Leuchte ein optisch ansprechendes Aussehen verliehen, wobei dennoch die gewünschten lichttechnischen Eigenschaften erhalten werden.The present invention thus offers the possibility of achieving light bundling of the light emitted by a light source with an optical element having a very small height. As a result, on the one hand, greater freedom in the design of a lamp. On the other hand, the luminaire is given a visually pleasing appearance, while still obtaining the desired photometric properties.

Claims (23)

  1. Light influencing element (6) for directing the light emitted by a light source (4) in a predetermined angular range,
    wherein the light influencing element (6) has a plurality of rib-like grid elements (7, 12) having reflective side walls arranged in a regular structure, and
    wherein the light influencing element consists of a transparent base plate (9) on the one flat side of which the screening elements (7, 12) are arranged,
    characterized in that
    the grid elements (7, 12) consist of a transparent material, wherein at least the side walls as well as the end faces of the grid elements (7, 12) facing away from the light source (4), are provided with a reflecting layer (8).
  2. Light influencing element (6) according to claim 1, characterized in that
    the grid elements (7, 12) have a height (H) of at most 5 mm.
  3. Light influencing element (6) according to claim 1 or 2,
    characterized in that
    the base plate (9) and the grid elements (7, 12) are designed as one piece.
  4. Light influencing element (6) according to claim 1 or 2, characterized in that
    the base plate (9) is glued to the grid elements (7, 12).
  5. Light influencing element according to one of the preceding claims,
    characterized in that
    a further transparent plate (10) is arranged on the side of the grid elements (7, 12) opposite the base plate (9).
  6. Light influencing element according to one of the preceding claims,
    characterized in that
    it is formed by an injection-molded part.
  7. Light influencing element according to one of the preceding claims,
    characterized in that
    the grid elements (7, 12) and, if appropriate, the transparent plates (9, 10) are made of PMMA.
  8. Light influencing element according to one of the preceding claims,
    characterized in that
    the spacing (D) between two grid elements (7, 12) corresponds approximately to twice the height (H) of the grid elements (7, 12).
  9. Light influencing element according to one of the preceding claims,
    characterized in that
    the grid elements (7, 12) have a height (H) of approximately 1 mm and the distance (D) between two adjacent grid elements (7, 12) is approximately 2 mm.
  10. Light influencing element according to one of the preceding claims,
    characterized in that
    the grid elements (7) are arranged linearly and parallel to one another.
  11. Light influencing element according to claim 1 to 9,
    characterized in that
    the grid elements (7) are arranged linearly and in a cross-structure.
  12. Light influencing element according to claim 1 to 9,
    characterized in that
    the grid elements (12) are annular in shape.
  13. Light influencing element according to claim 12,
    characterized in that
    the annular grid elements (12) are arranged in a honeycomb pattern.
  14. Light influencing element according to claim 13,
    characterized in that
    a ring has a diameter of about 2 mm.
  15. Light influencing element according to claim 13,
    characterized in that
    the annular grid elements (12) are arranged concentrically.
  16. Light influencing element according to one of the preceding claims,
    characterized in that
    the grid elements (7) have a V-shaped cross-section.
  17. Light influencing element according to one of the claims 1 to 15,
    characterized in that
    the grid elements (7) have a parabolic V-shaped structure as seen in cross-section.
  18. Light influencing element according to one of the claims 1 to 15,
    characterized in that
    the grid elements (7) each have a rib structure as seen in cross-section.
  19. Light influencing element according to claim 18,
    characterized in that
    the rib structure is formed by superimposed, prismatic or wedge-shaped stepped sections (7a).
  20. Luminaire (1) comprising a light source (4) or connection means (3) for such, as well as a light influencing element (6) arranged upstream of the light source (4), according to one of the preceding claims.
  21. Luminaire according to claim 20,
    characterized in that
    the light source is flat.
  22. Luminaire according to claim 20,
    characterized in that
    the light source comprises a base plate (13) on the side surface of which facing the grid elements (7), are arranged individual light sources (14).
  23. Luminaire according to claim 22,
    characterized in that
    the individual light sources (14) are arranged with respect to the light influencing element (6) in such a way that they radiate their light substantially into the free space between the grid elements (7).
EP10183921.5A 2003-04-03 2004-04-02 Light influencing element Expired - Lifetime EP2295851B1 (en)

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DE10315268A DE10315268A1 (en) 2003-04-03 2003-04-03 Light influencing element
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EP04725352.1 Division 2004-04-02

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NZ542705A (en) 2008-02-29
CN100532928C (en) 2009-08-26
CA2521058C (en) 2011-11-01
DE10315268A1 (en) 2004-10-14
US20060216474A1 (en) 2006-09-28
EP1608909B1 (en) 2015-02-25
CA2521058A1 (en) 2004-10-14
EP2295851A3 (en) 2014-09-03
WO2004088203A1 (en) 2004-10-14
NO20054373D0 (en) 2005-09-21
EP1608909A1 (en) 2005-12-28
CN1768232A (en) 2006-05-03
EP2295851A2 (en) 2011-03-16
NO336741B1 (en) 2015-10-26
NO20054373L (en) 2005-11-03
AU2004225784A1 (en) 2004-10-14
AU2004225784B2 (en) 2008-09-25
US7766506B2 (en) 2010-08-03

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