EP1033530B1 - Lamp with multiple spectral characteristics - Google Patents

Lamp with multiple spectral characteristics Download PDF

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Publication number
EP1033530B1
EP1033530B1 EP00104273A EP00104273A EP1033530B1 EP 1033530 B1 EP1033530 B1 EP 1033530B1 EP 00104273 A EP00104273 A EP 00104273A EP 00104273 A EP00104273 A EP 00104273A EP 1033530 B1 EP1033530 B1 EP 1033530B1
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EP
European Patent Office
Prior art keywords
light
beam path
lamp
luminaire
wavelength
Prior art date
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EP00104273A
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German (de)
French (fr)
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EP1033530A2 (en
EP1033530A3 (en
Inventor
Kurt-Gerhard Müggenburg
Kai Hendrik Sabla
Tobias Schiebold
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Osram SBT GmbH
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Siteco Beleuchtungstechnik GmbH
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Application filed by Siteco Beleuchtungstechnik GmbH filed Critical Siteco Beleuchtungstechnik GmbH
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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
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/08—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing coloured light, e.g. monochromatic; for reducing intensity of light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S10/00—Lighting devices or systems producing a varying lighting effect
    • F21S10/02—Lighting devices or systems producing a varying lighting effect changing colors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/002—Refractors for light sources using microoptical elements for redirecting or diffusing light
    • F21V5/003—Refractors for light sources using microoptical elements for redirecting or diffusing light using holograms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/02—Refractors for light sources of prismatic shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • F21V7/0016—Reflectors for light sources providing for indirect lighting on lighting devices that also provide for direct lighting, e.g. by means of independent light sources, by splitting of the light beam, by switching between both lighting modes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0025—Combination of two or more reflectors for a single light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes

Definitions

  • the invention relates to luminaires with which light with different spectral properties can be emitted.
  • a simple, well-known possibility is to set a colored in different colors screen of the lamp. Because of the generally diffusely scattering properties of such umbrellas lighting tasks, in which it depends on the geometric radiation characteristics of the individual color components, so that difficult or impossible. Moreover, the light losses are disadvantageous in such umbrellas.
  • the generic, DE 297 10 475 U1 discloses a luminaire which has a central main reflector, via the light exit opening, light of a lamp arranged in the reflector is emitted directly as a direct light component.
  • On both sides of the main reflector transparent light-scattering side body are arranged, in which light is coupled via one or more openings in the wall of the reflector and which emit scattered light at a light exit surface which is adjacent to the light exit opening of the main reflector.
  • These side panels can be colored to create color effects.
  • DE 43 36 023 A1 describes a lamp having a main reflector with a lamp arranged therein, which has a light exit opening for emitting a direct light component. Opposite this light exit opening, a second reflector opening is provided, via which light is emitted to a light-scattering roof reflector, which spans the main reflector. At the second light exit opening of the main reflector, a diffuser may be provided, which may be associated with a colored translucent film.
  • U.S. Patent No. 5,251,116 discloses a lamp in which on the one hand light of a lamp is emitted directly via a downwardly directed light exit opening and on the other hand passed light in a second beam path through a color filter and laterally emitted via a light exit opening in a side wall of the lamp for illuminating an object, wherein through the Color filter is to be avoided, that the illuminated object in the central region of the light cone, which is emitted via the second beam path, appears different in color.
  • this object is achieved by a luminaire according to claim 1.
  • a luminaire according to claim 1 With the solution according to the invention, it is possible to achieve different color effects in different spatial areas.
  • At least two bundles of radiation are spatially separated and as a rule passed through different beam-directing elements in spatially separated beam paths.
  • the lamp can emit white light or, more generally, light with multiple spectral components which can be separated by suitable means (spectral decomposition, absorption, etc.).
  • the wavelength selective element may be a wavelength selective absorbing element, such as a transmission filter. However, preference is given to a colored reflector element, wherein the paint can be painted or anodized.
  • the wavelength-selective element may also be a selective emissive element, and in particular comprise a fluorescent material which is excited by irradiation of preferably white light to a fluorescence emission of a particular color.
  • a wavelength selectivity can also be generated by refraction of light, for example by means of prisms, or by light diffraction, for example by means of diffraction gratings or holograms.
  • the coloring or color change need not be uniform. For example, multicolor mirrors or filters can be used or the spectral decomposition properties of prisms or gratings can be exploited.
  • the invention can be applied in particular to a luminaire having a main reflector in which the lamp is arranged and which defines a light exit opening of the luminaire, via which light of the lamp is emitted substantially directly in a direct beam.
  • the lamp may have a secondary reflector, on which a part of the light of the lamp is irradiated and which reflects this light.
  • the secondary mirror can have beam-expanding or beam-narrowing and accordingly be concave or convex.
  • a prism or another light-directing element is present in one of the beam paths, which may be e.g. the light in this beam path wholly or partially leads to the ceiling.
  • a wavelength-selective element is provided in the beam path, which includes the secondary reflector, while in the beam path from the lamp to said first light exit opening no wavelength-selective element is present.
  • the luminous flux component of the light emitted via the secondary reflector is smaller than that of the directly emitted light.
  • the impression of a colored, preferably transparent background can be generated.
  • the proportion of luminous flux of the undyed light ie the light emitted by the lamp, will be considerably larger as that of the colored light, so that the actual lighting is effected by the undyed light and the colored light sets essentially color accents, without contributing significantly to the lighting.
  • the luminaire has a diffuser element in the first beam path, which uniformizes differences in intensity of the light irradiated thereon and which, in particular, can be provided in the beam path having the secondary reflector.
  • This diffuser element is in use for a user directly or indirectly, e.g. by reflection, visible. It causes the user to perceive a uniformly luminous surface without contours or contrasts, so that the light appears to come essentially from the infinite and, accordingly, the eyes of the observer focus on a point at infinity (optical depth effect).
  • the diffuser element may be an at least partially transparent, backlit element that makes it impossible to resolve details behind that element.
  • a similar effect can also be achieved by a transparent element illuminated from the front and back by the observer, which makes it impossible to resolve details behind this element, for example by a partially transparent reflecting element, which preferably simultaneously serves as a secondary reflector in the arrangement described above can be used.
  • this effect can also be achieved by a spatially homogeneous transmission or reflection, e.g. through the use of extremely diffuse reflective colors and the avoidance of shadows and shadow-casting contours in the area concerned. In either case, a user sees a substantially contourless illuminated or illuminated surface.
  • the diffuser element simultaneously has a coloring effect and consists, for example, of a diffusely scattering, colored, at least partially translucent pane or a colored, diffusely scattering reflector.
  • the angular range in which light is emitted via the first beam path can partially overlap with the area in which light is emitted via the second beam path. With a partial overlap, a soft light transition between different areas can be created.
  • the angular range in which light is emitted via the first beam path is substantially is different from the region in which light is emitted via the second beam path.
  • the luminaire according to the invention can be set up in such a way that the spectral properties of the light emitted via the first beam path vary as a function of an emission angle which lies in a plane perpendicular to the luminaire axis.
  • the spectral properties in dependence on an angle which is parallel to the light axis in a plane vary, so that, for example, a user who moves in space on the ground, sees different colored light at different locations.
  • a prism plate is used to direct colored light in a predetermined direction so that it is radiated in a predetermined spatial area and at a predetermined critical angle.
  • This embodiment has the advantage that the optical depth effect and the light steering are effected by the same element.
  • prisms instead of prisms, other light-directing elements, such as lenses or mirrors can be used, whereby these elements, similar to a prism plate, can be implemented in the form of a microstructure, so for example by a plate whose surface is formed by closely spaced microlenses or a mirror, which has densely adjacent vaults.
  • light-diffractive elements such as holograms or diffraction gratings can be used, which already have a microstructure of their own home and therefore simultaneously provide for a light control and an optical depth effect.
  • the optical depth effect and the light steering are effected by an element and the coloring by another element, for example a colored reflector
  • another element for example a colored reflector
  • all three functions are met by a single element, such as a prism, a diffraction grating or a microstructured colored reflector.
  • an element in particular a prism, is provided in one of the beam paths, which simultaneously fulfills a light-directing and wavelength-selective function in the beam path.
  • the color components which are generated by a wavelength-selective element can be changed or blocked by a user or by an external control.
  • a diaphragm is provided in order to hide light passing through the wavelength-selective element and thus to switch the additionally emitted colored light on or off.
  • the wavelength-selective element is arranged so that its selection properties and thus the color of the light emitted by it can be changed.
  • a simple possibility of implementation is, for example, a revolver unit with various filters that can be rotated in the beam path.
  • the color of the emitted light can be changed, wherein deviations in the beam direction can optionally be corrected by a downstream rotatable mirror.
  • the colored lighting of the room can be temporally changed.
  • the lamp according to the invention can be realized in a variety of applications, for example as recessed luminaire, surface-mounted luminaire or pendant luminaire.
  • the invention opens up new possibilities for room lighting.
  • soft light-dark transitions in particular be realized at the cut-off line.
  • the spectral components of the emitted light can be adjusted in a controlled manner in order to give the viewer a subjectively more pleasant feeling.
  • a recessed ceiling light which is generally designated 1 and having a main reflector 3, which defines a light exit opening 5, via which a first part of the light of a lamp 7, which emits white light, substantially directly downwards is radiated, wherein the edge of the main reflector 3 sets the maximum radiation angle to the vertical, thus causing a glare limitation.
  • 3 raster elements 9 are arranged substantially perpendicular to the lamp axis in the main reflector, which also serve the glare limitation.
  • a lamp housing 11 is provided with a substantially diffusely scattering wall 12 into which a second light exit opening 13 of the Main reflector 3, a second portion of the radiated light from the lamp 7 is irradiated.
  • the light emitted by the lamp 7 initially falls on a roof reflector 15 and is reflected from there to colored additional mirrors 17a and 17b, which are provided on both sides of the main reflector 15 and which reflect the light to two further light exit openings 19a and 19b. Because of the color of the mirrors 17a and 17b, the light exiting through the light exit openings 19a and 19b appears colored.
  • prism plates 21a and 21b which has on one or both surfaces of a prismatic structure, which directs the incident on them or exiting them light in a predetermined direction.
  • the surface with the prismatic structure may face the housing 11 or be away from it. Both are exemplary in Fig. 1 shown by the prism plates 21a and 21b.
  • the two prism plates 21a and 21b may well have different light-directing properties, so that an overall asymmetric radiation of the colored light is achieved.
  • the mirrors 17a and 17b may be differently colored and / or each have different differently colored areas. If a symmetrical distribution of the colored light is desired, however, one will orient the two prism plates 21a and 21b in the same way and otherwise also the light-directing properties and the properties of the coloring elements, e.g. of the reflectors 17a and 17b, choose symmetrically.
  • the mirrors 17a and 17b are considered as coloring elements in the illustrated embodiment, but also, in particular, the prism plates 21a and 21b, which, optionally in combination with beam-limiting elements, such as diaphragms or the like, can select a specific wavelength or a specific wavelength range .
  • Coloring can be achieved instead of refraction, as in prisms, also by diffraction of light, for example by a grating, a hologram or the like.
  • a colored filter can be provided in the beam path of the indirectly emitted light.
  • a fluorescent element is present, which is excited into white light to fluoresce, thereby emitting colored light.
  • the emission direction of the white light emitted from the lamp 7 via the reflector opening 5 can be adjusted and limited independently of the emission direction of the colored light emitted via the light exit openings 19a and 19b.
  • the corresponding radiation areas as in Fig. 2 shown schematically, are set up so that a viewer in an angular range ⁇ sees white light and sees in a subsequent to this angular range angle range ⁇ colored light.
  • the angle range ⁇ can correspond to a work area which is to be brightly illuminated, while the light emission in the angle range ⁇ serves for the general background illumination or the setting of color accents.
  • the reverse constellation is possible, as in Fig.
  • angle range ⁇ and ⁇ can be set differently, as required by the lighting task, as well as this FIGS. 2 and 3 demonstrate. Instead of two areas, as in FIGS. 2 and 3 can be provided, three or more areas may be provided, in each of which light is emitted with other spectral properties; Likewise, the light radiated into the angular range ⁇ can be colored and have a different color than the light radiated into the angular range ⁇ .
  • angle ranges ⁇ and ⁇ for the sake of clarity are shown as sharply delimited angle ranges, which also makes sense in applications where the white or colored light is used for marking purposes, optically delimiting a certain spatial area, is usually the areas ⁇ and ⁇ overlap, so that a soft optical transition between the areas arises.
  • the areas ⁇ and ⁇ can also overlap completely in order to achieve a specific spectral characteristic, for example for the simulation of daylight.
  • the prism plates 21a and 21b have, in addition to their light-directing and possibly also coloring function, the further function of producing an optical depth effect, that is, an observer looking at the light exit openings 19a and 19b does not perceive the end of the luminaire housing, in particular the wall 12, but sees only a uniform luminous surface apparently without limitation in the vertical.
  • This has the physiologically advantageous effect that the eyes of the observer focus on a point at infinity and the eye muscles therefore relax when viewing these light exit openings.
  • This effect of the prismatic disks 21a and 21b, on the one hand transparent to light, on the other hand to make all contours behind disappear, can also be achieved by other means.
  • the function of the light control and the limitation of the emission angle can also be met by the reflectors 12, 15, 17a and 17b as well as the edge of a luminaire housing.
  • FIG. 4 shows a further embodiment of the invention in an application in the form of a suspension lamp.
  • a main reflector 51 is again provided, which is accommodated in a lamp housing 53 and has a lower light exit opening 55 and an upper light exit opening 57.
  • a white light emitting lamp 58 In the lower light exit opening raster elements 59 are provided for glare limitation again in a known manner.
  • the upper light exit opening 57 is completely or partially closed by a light-transmitting coloring element 61, for example a filter, which dyes the light passing through with a specific color.
  • the light emitted upward through the opening 57 is reflected back by a reflecting sail 63.
  • the sail 63 may possibly also be partially transparent.
  • the light-directing properties of the lamp with respect to the colored light are determined in this case primarily by the reflective sail 63, wherein the shape of the upper light exit opening 57 and possibly also the shape of the lamp housing 53 contribute to a beam limitation of the colored light.
  • a colored sail 63 may also be used. It can also be provided that the sail 63 is colored differently in areas which reflect in different spatial areas.
  • the properties of the light guidance, the coloring as well as the generation of the above-described optical depth effect can be achieved by a single element, for example a prism or a diffraction grating.
  • the different functions can be perceived individually or in subcombination also by different elements.
  • the coloring elements can also cause a complete spectral decomposition, so that the color changes continuously as a function of an angle.
  • this angle may be an angle in a plane enclosing the vertical axis.
  • it may also be an angle perpendicular to the vertical in a plane such that a viewer walking in a circle around the lamp sees different colors in different positions.
  • the invention is not limited thereto and also includes multi-lamp embodiments.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Spectrometry And Color Measurement (AREA)

Abstract

The lighting unit has an electrical light bulb (7) set into a main reflector (3) the top of which is open. Light is directed by ceiling elements (15) onto a pair of colored mirrors (17). The colored light is directed as secondary light through distributor panels (21)

Description

Die Erfindung betrifft Leuchten, mit denen Licht mit verschiedenen Spektraleigenschaften abgegeben werden kann.The invention relates to luminaires with which light with different spectral properties can be emitted.

Bei Beleuchtungsaufgaben ist es häufig wünschenswert, in verschiedenen Raumbereichen Licht unterschiedlicher Farbe oder allgemeiner Licht mit unterschiedlichen Spektralcharakteristiken zu verwenden oder Licht mit unterschiedlichen Spektralcharakteristiken zu mischen, um eine gewünschte Spektralcharakteristik zu erzeugen, beispielsweise, um Tageslicht zu simulieren.In lighting tasks, it is often desirable to use different color or more generally light having different spectral characteristics in different spatial areas, or to mix light having different spectral characteristics to produce a desired spectral characteristic, for example, to simulate daylight.

Eine einfache, allgemein bekannte Möglichkeit besteht darin, einen in verschiedenen Farben gefärbten Schirm der Leuchte vorzusetzen. Wegen der in der Regel diffus streuenden Eigenschaften solcher Schirme lassen sich Beleuchtungsaufgaben, bei der es auf die geometrische Abstrahlcharakteristik der einzelnen Farbanteile ankommt, damit nicht oder nur schwer lösen. Im übrigen sind die Lichtverluste bei solchen Schirmen nachteilig.A simple, well-known possibility is to set a colored in different colors screen of the lamp. Because of the generally diffusely scattering properties of such umbrellas lighting tasks, in which it depends on the geometric radiation characteristics of the individual color components, so that difficult or impossible. Moreover, the light losses are disadvantageous in such umbrellas.

Ebenfalls ist bekannt, Leuchten oder Scheinwerfer mit unterschiedlicher Farbcharakteristik einzusetzen. Dies gestattet zwar eine präzise Ausleuchtung im Sinne der gestellten Aufgabe, ist jedoch aufwendig. Die bei solchen Lösungen in der Regel eng beeinanderliegende Anordnung von Leuchten oder Scheinwerfern ist häufig auch aus ästhetischen Gründen nicht wünschenswert.It is also known to use lights or headlights with different color characteristics. Although this allows a precise illumination in the sense of the task, but is expensive. The arrangement of luminaires or headlamps, which is usually closely contiguous with such solutions, is often undesirable for aesthetic reasons as well.

Die gattungsbildende, DE 297 10 475 U1 offenbart eine Leuchte, welche einen zentralen Hauptreflektor aufweist, über dessen Lichtaustrittsöffnung Licht einer in dem Reflektor angeordneten Lampe unmittelbar als direkter Lichtanteil abgegeben wird. Auf beiden Seiten des Hauptreflektors sind transparente lichtstreuende Seitenkörper angeordnet, in welche über eine oder mehrere Öffnungen in der Wand des Reflektors Licht eingekoppelt wird und welche an einer Lichtaustrittsfläche, welche an die Lichtaustrittsöffnung des Hauptreflektors angrenzt, Streulicht abgeben. Diese Seitenteile können eingefärbt sein, um Farbeffekte zu erzeugen.The generic, DE 297 10 475 U1 discloses a luminaire which has a central main reflector, via the light exit opening, light of a lamp arranged in the reflector is emitted directly as a direct light component. On both sides of the main reflector transparent light-scattering side body are arranged, in which light is coupled via one or more openings in the wall of the reflector and which emit scattered light at a light exit surface which is adjacent to the light exit opening of the main reflector. These side panels can be colored to create color effects.

DE 43 36 023 A1 beschreibt eine Leuchte mit einem Hauptreflektor mit einer darin angeordneten Lampe, der eine Lichtaustrittsöffnung zur Abgabe eines direkten Lichtanteils aufweist. Gegenüber dieser Lichtaustrittsöffnung ist eine zweite Reflektoröffnung vorgesehen, über welche Licht zu einem lichtstreuenden Dachreflektor abgegeben wird, welcher den Hauptreflektor überspannt. An der zweiten Lichtaustrittsöffnung des Hauptreflektors kann ein Diffusor vorgesehen sein, dem eine eingefärbte lichtdurchlässige Folie zugeordnet sein kann. DE 43 36 023 A1 describes a lamp having a main reflector with a lamp arranged therein, which has a light exit opening for emitting a direct light component. Opposite this light exit opening, a second reflector opening is provided, via which light is emitted to a light-scattering roof reflector, which spans the main reflector. At the second light exit opening of the main reflector, a diffuser may be provided, which may be associated with a colored translucent film.

US-PS 5 251 116 offenbart eine Leuchte, bei der einerseits Licht einer Lampe unmittelbar über eine nach unten gerichtete Lichtaustrittsöffnung abgegeben wird und andererseits Licht in einem zweiten Strahlengang durch einen Farbfilter geleitet und seitlich über eine Lichtaustrittsöffnung in einer Seitenwand der Leuchte zur Beleuchtung eines Objekts abgestrahlt wird, wobei durch den Farbfilter vermieden werden soll, daß das beleuchtete Objekt in dem Zentralbereich des Lichtkegels, der über den zweiten Strahlengang abgegeben wird, farblich verschieden erscheint. U.S. Patent No. 5,251,116 discloses a lamp in which on the one hand light of a lamp is emitted directly via a downwardly directed light exit opening and on the other hand passed light in a second beam path through a color filter and laterally emitted via a light exit opening in a side wall of the lamp for illuminating an object, wherein through the Color filter is to be avoided, that the illuminated object in the central region of the light cone, which is emitted via the second beam path, appears different in color.

Es ist die Aufgabe der Erfindung, eine Leuchte zur Verfügung zu stellen, welche einen stärker differenzierten Einsatz von Farbeffekten bei der Beleuchtung zuläßt.It is the object of the invention to provide a luminaire which allows a more differentiated use of color effects in lighting.

Erfindungsgemäß wird diese Aufgabe durch eine Leuchte nach Anspruch 1 gelöst. Mit der erfindungsgemäßen Lösung ist es möglich, in unterschiedlichen Raumbereichen unterschiedliche Farbwirkungen zu erzielen.According to the invention this object is achieved by a luminaire according to claim 1. With the solution according to the invention, it is possible to achieve different color effects in different spatial areas.

Erfindungsgemäß werden mindestens zwei Strahlenbündel räumlich getrennt und in der Regel durch verschiedene strahllenkende Elemente in räumlich getrennten Strahlengängen geleitet.According to the invention, at least two bundles of radiation are spatially separated and as a rule passed through different beam-directing elements in spatially separated beam paths.

Gemäß einer Ausführungsform der Erfindung kann die Lampe weißes Licht oder, allgemeiner gesprochen, Licht mit mehreren Spektralkomponenten abstrahlen, die durch geeignete Mittel (Spektralzerlegung, Absorption, etc.) separiert werden können.According to one embodiment of the invention, the lamp can emit white light or, more generally, light with multiple spectral components which can be separated by suitable means (spectral decomposition, absorption, etc.).

Das wellenlängenselektive Element kann ein wellenlängenselektiv absorbierendes Element sein, wie beispielsweise ein Transmissionsfilter. Bevorzugt wird jedoch ein farbiger Reflektorelement, wobei die Farbe auflackiert oder eloxiert sein kann. Das wellenlängenselektive Element kann auch ein selektiv emittierendes Element sein, und insbesondere ein fluoreszierendes Material aufweisen, das durch Einstrahlen von vorzugsweise weißem Licht zu einer Fluoreszenzemission mit einer bestimmten Farbe angeregt wird. Eine Wellenlängenselektivität kann auch durch Lichtbrechung, beispielsweise mittels Prismen, oder durch Lichtbeugung, beispielsweise mittels Beugungsgitter oder Hologramme, erzeugt werden. Die Farbgebung oder Farbveränderung muß nicht einheitlich sein. Beispielsweise können mehrfarbige Spiegel oder Filter verwendet werden oder die spektralzerlegenden Eigenschaften von Prismen oder Gittern ausgenutzt werden.The wavelength selective element may be a wavelength selective absorbing element, such as a transmission filter. However, preference is given to a colored reflector element, wherein the paint can be painted or anodized. The wavelength-selective element may also be a selective emissive element, and in particular comprise a fluorescent material which is excited by irradiation of preferably white light to a fluorescence emission of a particular color. A wavelength selectivity can also be generated by refraction of light, for example by means of prisms, or by light diffraction, for example by means of diffraction gratings or holograms. The coloring or color change need not be uniform. For example, multicolor mirrors or filters can be used or the spectral decomposition properties of prisms or gratings can be exploited.

Die Erfindung kann insbesondere auf eine Leuchte angewendet werden, die einen Hauptreflektor aufweist, in dem die Lampe angeordnet ist und der eine Lichtaustrittsöffnung der Leuchte festlegt, über welche Licht der Lampe im wesentlichen direktstrahlend abgegeben wird. Hierbei kann die Leuchte einen Sekundärreflektor aufweisen, auf den ein Teil des Lichts der Lampe eingestrahlt wird und der dieses Licht reflektiert.The invention can be applied in particular to a luminaire having a main reflector in which the lamp is arranged and which defines a light exit opening of the luminaire, via which light of the lamp is emitted substantially directly in a direct beam. Here, the lamp may have a secondary reflector, on which a part of the light of the lamp is irradiated and which reflects this light.

Der Sekundärspiegel kann, je nach der gewünschten Abstrahlcharakteristik, strahlerweiternd oder strahlverengend wirken und dementsprechend konkav oder konvex ausgebildet sein. Zur Verbesserung der Lichtlenkungseigenschaften kann insbesondere auch vorgesehen sein, daß in einem der Strahlengänge ein Prisma oder ein anderes lichtlenkendes Element vorhanden ist, welches z.B. das Licht in diesem Strahlengang ganz oder teilweise zur Decke leitet.Depending on the desired emission characteristic, the secondary mirror can have beam-expanding or beam-narrowing and accordingly be concave or convex. In order to improve the light-guiding properties, it may also be provided in particular that a prism or another light-directing element is present in one of the beam paths, which may be e.g. the light in this beam path wholly or partially leads to the ceiling.

Es kann vorgesehen sein, daß in dem Strahlengang, der den Sekundärreflektor einschließt, ein wellenlängenselektives Element vorgesehen ist, während in dem Strahlengang von der Lampe zu der besagten ersten Lichtaustrittsöffnung kein wellenlängenselektives Element vorhanden ist.It can be provided that in the beam path, which includes the secondary reflector, a wavelength-selective element is provided, while in the beam path from the lamp to said first light exit opening no wavelength-selective element is present.

Insbesondere kann vorgesehen sein, daß der Lichtstromanteil des über den Sekundärreflektor abgegebenen Lichts kleiner als derjenige des direkt abgestrahlten Lichts ist. Hierdurch kann der Eindruck eines farbigen, vorzugsweise transparenten Hintergrundes erzeugt werden.In particular, it may be provided that the luminous flux component of the light emitted via the secondary reflector is smaller than that of the directly emitted light. As a result, the impression of a colored, preferably transparent background can be generated.

Allgemein wird man bei der Raumbeleuchtung, insbesondere mit Hinblick auf die einschlägige Normen, welche die Farbe des für die Beleuchtung zu verwendenden Lichts festlegen und einschränken, den Lichtstromanteil des ungefärbten Lichts, also des Lichts, wie es von der Lampe abgestrahlt wird, erheblich größer wählen als den des farbigen Lichts, so daß die eigentliche Beleuchtung durch das ungefärbte Licht bewirkt wird und das farbige Licht im wesentlichen Farbakzente setzt, ohne wesentlich zur Beleuchtung beizutragen.In general, in the case of room lighting, especially with regard to the relevant standards which set and limit the color of the light to be used for the lighting, the proportion of luminous flux of the undyed light, ie the light emitted by the lamp, will be considerably larger as that of the colored light, so that the actual lighting is effected by the undyed light and the colored light sets essentially color accents, without contributing significantly to the lighting.

Gemäß einer bevorzugten Ausführungsform weist die Leuchte ein Diffusorelement in dem ersten Strahlengang auf, welches Intensitätsunterschiede des darauf eingestrahlten Lichts vergleichmäßigt und das insbesondere in dem den Sekundärreflektor aufweisenden Strahlengang vorgesehen sein kann.According to a preferred embodiment, the luminaire has a diffuser element in the first beam path, which uniformizes differences in intensity of the light irradiated thereon and which, in particular, can be provided in the beam path having the secondary reflector.

Dieses Diffusorelement ist im Einsatz für einen Benutzer direkt oder indirekt, z.B. durch Spiegelung, sichtbar. Es bewirkt, daß der Benutzer eine gleichmäßig leuchtende Fläche ohne Konturen oder Kontraste wahrnimmt, so daß das Licht im wesentlichen aus dem Unendlichen zu kommen scheint und sich dementsprechend die Augen des Betrachters auf einen Punkt im Unendlichen fokussieren (optische Tiefenwirkung).This diffuser element is in use for a user directly or indirectly, e.g. by reflection, visible. It causes the user to perceive a uniformly luminous surface without contours or contrasts, so that the light appears to come essentially from the infinite and, accordingly, the eyes of the observer focus on a point at infinity (optical depth effect).

Das Diffusorelement kann insbesondere ein zumindest teilweise transparentes, von hinten beleuchtetes Element sein, das es unmöglich macht, Details hinter diesem Element aufzulösen. Ein ähnlicher Effekt kann jedoch auch durch ein transparentes, aus Beobachterrichtung von vorne und hinten beleuchtetes Element erreicht werden, das es unmöglich macht, Details hinter diesem Element aufzulösen, beispielsweise durch ein teilweise transparentes reflektierendes Element, das vorzugsweise gleichzeitig als Sekundärreflektor bei der oben beschriebenen Anordnung eingesetzt werden kann. Dieser Effekt kann allerdings auch durch eine räumlich homogene Transmission oder Reflexion erreicht werden, z.B. durch die Verwendung von extrem diffus reflektierenden Farben und die Vermeidung von Schatten und schattenwerfenden Konturen in dem betreffenden Bereich. In jedem Fall sieht ein Benutzer eine im wesentlichen konturenfreie beleuchtete oder leuchtende Fläche.In particular, the diffuser element may be an at least partially transparent, backlit element that makes it impossible to resolve details behind that element. However, a similar effect can also be achieved by a transparent element illuminated from the front and back by the observer, which makes it impossible to resolve details behind this element, for example by a partially transparent reflecting element, which preferably simultaneously serves as a secondary reflector in the arrangement described above can be used. However, this effect can also be achieved by a spatially homogeneous transmission or reflection, e.g. through the use of extremely diffuse reflective colors and the avoidance of shadows and shadow-casting contours in the area concerned. In either case, a user sees a substantially contourless illuminated or illuminated surface.

Gemäß einer bevorzugten Ausführungsform hat das Diffusorelement gleichzeitig eine farbgebende Wirkung und besteht beispielsweise aus einer diffus streuenden, farbigen, zumindest teilweise lichtdurchlässigen Scheibe oder einem farbigen, diffus streuenden Reflektor.According to a preferred embodiment, the diffuser element simultaneously has a coloring effect and consists, for example, of a diffusely scattering, colored, at least partially translucent pane or a colored, diffusely scattering reflector.

Erfindungsgemäß kann der Winkelbereich, in den Licht über den ersten Strahlengang abgestrahlt wird, mit dem Bereich, in den Licht über den zweiten Strahlengang abgestrahlt wird, teilweise überlappen. Mit einer teilweisen Überlappung läßt sich ein weicher Lichtübergang zwischen verschiedenen Bereichen erzeugen.According to the invention, the angular range in which light is emitted via the first beam path can partially overlap with the area in which light is emitted via the second beam path. With a partial overlap, a soft light transition between different areas can be created.

Insbesondere zu Zwecken der optischen Markierung kann jedoch auch vorgesehen sein, daß der Winkelbereich, in den Licht über den ersten Strahlengang abgestrahlt wird, im wesentlichen von demjenigen Bereich, in den Licht über den zweiten Strahlengang abgestrahlt wird, verschieden ist.However, in particular for purposes of optical marking, it may also be provided that the angular range in which light is emitted via the first beam path is substantially is different from the region in which light is emitted via the second beam path.

Die erfindungsgemäße Leuchte kann so eingerichtet sein, daß die Spektraleigenschaften des über den ersten Strahlengang abgestrahlten Lichts in Abhängigkeit von einem Abstrahlwinkel, der in einer Ebene senkrecht zur Leuchtenachse liegt, variieren. Es kann jedoch auch vorgesehen sein, daß die Spektraleigenschaften in Abhängigkeit von einem Winkel, der in einer Ebene parallel zur Leuchtenachse liegt, variieren, so daß beispielsweise ein Benutzer, der sich im Raum am Boden bewegt, an verschiedenen Stellen verschieden farbiges Licht sieht.The luminaire according to the invention can be set up in such a way that the spectral properties of the light emitted via the first beam path vary as a function of an emission angle which lies in a plane perpendicular to the luminaire axis. However, it may also be provided that the spectral properties in dependence on an angle which is parallel to the light axis in a plane vary, so that, for example, a user who moves in space on the ground, sees different colored light at different locations.

Gemäß einer bevorzugten Ausführungsform wird eine Prismenplatte verwendet, um farbiges Licht in eine vorgegebene Richtung zu lenken, so daß es in einen vorgegebenen Raumbereich und mit einem vorgegebenen Grenzwinkel abgestrahlt wird. Diese Ausführungsform hat den Vorteil, daß die optische Tiefenwirkung und die Lichtlenkung von demselben Element bewirkt werden. Selbstverständlich ist es auch möglich, die Lichtlenkung durch ein separates Element, beispielsweise ein einziges Prisma oder einen Prismenring, zu erzeugen und die optische Tiefenwirkung durch ein zweites Element, beispielsweise eine transparente streuende Folie, herbeizuführen.According to a preferred embodiment, a prism plate is used to direct colored light in a predetermined direction so that it is radiated in a predetermined spatial area and at a predetermined critical angle. This embodiment has the advantage that the optical depth effect and the light steering are effected by the same element. Of course, it is also possible to generate the light guidance by a separate element, for example a single prism or a prism ring, and to bring about the optical depth effect by means of a second element, for example a transparent scattering film.

Statt Prismen können auch andere lichtlenkende Elemente, wie Linsen oder Spiegel verwendet werden, wobei auch diese Elemente, ähnlich wie bei einer Prismenplatte, in Form einer Mikrostrukturierung implementiert sein können, also beispielsweise durch eine Platte, deren eine Oberfläche durch dicht nebeneinanderliegende Mikrolinsen gebildet wird oder einen Spiegel, der dicht nebeneinanderliegende Wölbungen aufweist. Ebenso können zur Lichtlenkung auch lichtbeugende Elemente, wie Hologramme oder Beugungsgitter verwendet werden, die bereits von Hause aus eine Mikrostrukturierung aufweisen und dementsprechend gleichzeitig für eine Lichtlenkung und eine optische Tiefenwirkung sorgen.Instead of prisms, other light-directing elements, such as lenses or mirrors can be used, whereby these elements, similar to a prism plate, can be implemented in the form of a microstructure, so for example by a plate whose surface is formed by closely spaced microlenses or a mirror, which has densely adjacent vaults. Likewise, light-diffractive elements, such as holograms or diffraction gratings can be used, which already have a microstructure of their own home and therefore simultaneously provide for a light control and an optical depth effect.

Während gemäß einer bevorzugten Ausführungsform die optische Tiefenwirkung und die Lichtlenkung durch ein Element bewirkt werden und die Farbgebung durch ein weiteres Element, beispielsweise einen gefärbten Reflektor, kann gemäß einer weiteren Ausführungsform auch vorgesehen sein, daß alle drei Funktionen durch ein einziges Element, beispielsweise ein Prisma, ein Beugungsgitter oder einen mikrostrukturierten farbigen Reflektor erfüllt werden.While according to a preferred embodiment, the optical depth effect and the light steering are effected by an element and the coloring by another element, for example a colored reflector, according to another embodiment also be provided that all three functions are met by a single element, such as a prism, a diffraction grating or a microstructured colored reflector.

Gemäß einer Ausführungsform ist in einem der Strahlengänge ein Element, insbesondere ein Prisma, vorgesehen, welches gleichzeitig eine lichtlenkende und wellenlängenselektive Funktion in dem Strahlengang erfüllt.According to one embodiment, an element, in particular a prism, is provided in one of the beam paths, which simultaneously fulfills a light-directing and wavelength-selective function in the beam path.

Gemäß einer vorteilhaften Ausführungsform können die Farbanteile, welche durch ein wellenlängenselektives Element erzeugt werden, durch einen Benutzer oder durch eine externe Steuerung verändert oder blockiert werden. Im einfachsten Fall ist beispielsweise eine Blende vorhanden, um durch das wellenlängenselektive Element laufendes Licht auszublenden und somit das zusätzlich abgestrahlte farbige Licht ein- bzw. auszuschalten. Gemäß einer weiteren Ausführungsform ist das wellenlängenselektive Element so eingerichtet, daß seine Selektionseigenschaften und damit die Farbe des von ihm abgegebenen Lichts verändert werden können. Eine einfache Möglichkeit der Realisierung ist beispielsweise eine Revolvereinheit mit verschiedenen Filtern, die in den Strahlengang gedreht werden können. Ebenso läßt sich durch Drehung eines wellenlängenselektiv angeordneten Prismas die Farbe des abgegebenen Lichts verändern, wobei Abweichungen in der Strahlrichtung gegebenenfalls durch einen nachgeschalteten drehbaren Spiegel korrigiert werden können. Auf diese Weise läßt sich die farbige Beleuchtung des Raums gezielt zeitlich verändern. Insbesondere ist es auch möglich, die Spektralverteilung des in den Raum abgestrahlten Lichts in Abhängigkeit von der Zeit zu verändern und dadurch z.B. die Änderung der Spektralzusammensetzung des natürlichen Tageslichts mit der Tageszeit nachzubilden.According to an advantageous embodiment, the color components which are generated by a wavelength-selective element can be changed or blocked by a user or by an external control. In the simplest case, for example, a diaphragm is provided in order to hide light passing through the wavelength-selective element and thus to switch the additionally emitted colored light on or off. According to a further embodiment, the wavelength-selective element is arranged so that its selection properties and thus the color of the light emitted by it can be changed. A simple possibility of implementation is, for example, a revolver unit with various filters that can be rotated in the beam path. Likewise, by rotating a wavelength-selective arranged prism, the color of the emitted light can be changed, wherein deviations in the beam direction can optionally be corrected by a downstream rotatable mirror. In this way, the colored lighting of the room can be temporally changed. In particular, it is also possible to vary the spectral distribution of the light emitted into the room as a function of time, and thereby e.g. to model the change in the spectral composition of natural daylight with the time of day.

Die erfindungsgemäße Leuchte kann in den verschiedensten Anwendungsformen realisiert werden, beispielsweise als Einbauleuchte, Anbauleuchte oder Pendelleuchte.The lamp according to the invention can be realized in a variety of applications, for example as recessed luminaire, surface-mounted luminaire or pendant luminaire.

Mit der Erfindung werden neue Möglichkeiten bei der Raumausleuchtung eröffnet. Insbesondere ist es möglich, in wesentlich größerem Umfang als bisher und mit wesentlich einfacheren Mitteln gezielt farbiges Licht einzusetzen, um einen Betrachter zu stimulieren oder auch nur einfach ein subjektiv angenehmeres Lichtempfinden als bei hartem weißen Licht zu vermitteln. Mit der erfindungsgemäßen Leuchte können weiche Hell-Dunkelübergänge, insbesondere an der Cut-Off-Grenze realisiert werden. Die Spektralanteile des abgestrahlten Lichts können in kontrollierter Weise eingestellt werden, um dem Betrachter ein subjektiv angenehmeres Gefühl zu vermitteln.The invention opens up new possibilities for room lighting. In particular, it is possible to use colored light to a much greater extent than before and with much simpler means in order to stimulate a viewer or even just to convey a subjectively more pleasant perception of light than in hard white light. With the luminaire according to the invention, soft light-dark transitions, in particular be realized at the cut-off line. The spectral components of the emitted light can be adjusted in a controlled manner in order to give the viewer a subjectively more pleasant feeling.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung von besonderen Ausführungsformen anhand der beigefügten Zeichungen.

  • Fig. 1 zeigt eine erste Ausführungsform einer erfindungsgemäßen Leuchte in einer Schnittansicht senkrecht zur Lampenachse,
  • Fig. 2 zeigt schematisch die Winkelverteilung von farbigem Licht bzw. weißem Licht bei einer besonderen Ausführungsform der Erfindung,
  • Fig. 3 zeigt, ähnlich wie Fig. 2, die Winkelverteilung von farbigem Licht bzw. weißem Licht bei einer weiteren Ausführungsform der Erfindung.
  • Fig. 4 zeigt eine zweite Ausführungsform einer erfindungsgemäßen Leuchte in einer Schnittansicht senkrecht zur Lampenachse,
Further features and advantages of the invention will become apparent from the following description of specific embodiments with reference to the accompanying drawings.
  • Fig. 1 shows a first embodiment of a luminaire according to the invention in a sectional view perpendicular to the lamp axis,
  • Fig. 2 shows schematically the angular distribution of colored light or white light in a particular embodiment of the invention,
  • Fig. 3 shows, similar to Fig. 2 , the angular distribution of colored light or white light in a further embodiment of the invention.
  • Fig. 4 shows a second embodiment of a luminaire according to the invention in a sectional view perpendicular to the lamp axis,

In Fig. 1 ist als beispielhafte Ausführungsform der Erfindung eine Deckeneinbauleuchte dargestellt, welche allgemein mit 1 bezeichnet ist und die einen Hauptreflektor 3 aufweist, der eine Lichtaustrittsöffnung 5 festlegt, über die ein erster Teil des Lichtes einer Lampe 7, die weißes Licht abgibt, im wesentlichen direkt nach unten abgestrahlt wird, wobei der Rand des Hauptreflektors 3 den maximalen Abstrahlwinkel zur Vertikalen festlegt und somit eine Blendungsbegrenzung bewirkt. In herkömmlicher Weise sind in dem Hauptreflektor 3 Rasterelemente 9 im wesentlichen senkrecht zur Lampenachse angeordnet, die ebenfalls der Blendungsbegrenzung dienen.In Fig. 1 is shown as an exemplary embodiment of the invention, a recessed ceiling light, which is generally designated 1 and having a main reflector 3, which defines a light exit opening 5, via which a first part of the light of a lamp 7, which emits white light, substantially directly downwards is radiated, wherein the edge of the main reflector 3 sets the maximum radiation angle to the vertical, thus causing a glare limitation. In a conventional manner, 3 raster elements 9 are arranged substantially perpendicular to the lamp axis in the main reflector, which also serve the glare limitation.

Oberhalb des Hauptreflektors 3 ist ein Leuchtengehäuse 11 mit einer im wesentlichen diffus streuenden Wand 12 vorgesehen, in das über eine zweite Lichtaustrittsöffnung 13 des Hauptreflektors 3 ein zweiter Anteil des von der Lampe 7 abgestrahlten Lichts eingestrahlt wird. Das von der Lampe 7 abgestrahlte Licht fällt zunächst auf einen Dachreflektor 15 und wird von dort zu farbigen Zusatzspiegeln 17a und 17b reflektiert, die zu beiden Seiten des Hauptreflektors 15 vorgesehen sind und welche das Licht zu zwei weiteren Lichtaustrittsöffnungen 19a und 19b reflektieren. Wegen der Farbigkeit der Spiegel 17a und 17b erscheint das durch die Lichtaustrittsöffnungen 19a und 19b austretende Licht farbig.Above the main reflector 3, a lamp housing 11 is provided with a substantially diffusely scattering wall 12 into which a second light exit opening 13 of the Main reflector 3, a second portion of the radiated light from the lamp 7 is irradiated. The light emitted by the lamp 7 initially falls on a roof reflector 15 and is reflected from there to colored additional mirrors 17a and 17b, which are provided on both sides of the main reflector 15 and which reflect the light to two further light exit openings 19a and 19b. Because of the color of the mirrors 17a and 17b, the light exiting through the light exit openings 19a and 19b appears colored.

In den Lichtaustrittsöffnungen 19a und 19b sind als lichtlenkende Elemente Prismenplatten 21a und 21b vorgesehen, die auf einer oder auf beiden Oberflächen eine Prismenstruktur aufweist, die das auf sie einfallende bzw. aus ihnen austretende Licht in eine vorgegebene Richtung lenkt. Bei einer einseitigen Prismenstruktur kann die Oberfläche mit der Prismenstruktur dem Gehäuse 11 zugewandt oder von diesem weggewandt sein. Beides ist beispielhaft in Fig. 1 anhand der Prismenplatten 21a und 21b gezeigt.In the light exit openings 19a and 19b are provided as light-directing elements prism plates 21a and 21b, which has on one or both surfaces of a prismatic structure, which directs the incident on them or exiting them light in a predetermined direction. In the case of a one-sided prism structure, the surface with the prismatic structure may face the housing 11 or be away from it. Both are exemplary in Fig. 1 shown by the prism plates 21a and 21b.

Die beiden Prismenplatten 21a und 21b können durchaus verschiedene lichtlenkende Eigenschaften haben, so daß insgesamt eine asymmetrische Abstrahlung des farbigen Lichts erreicht wird. Ebenso können auch die Spiegel 17a und 17b unterschiedlich gefärbt sein und/oder jeweils verschiedene unterschiedlich gefärbte Bereiche aufweisen. Ist eine symmetrische Verteilung des farbigen Lichts gewünscht, wird man allerdings die beiden Prismenplatten 21a und 21b in derselben Weise orientieren und auch ansonsten die lichtlenkenden Eigenschaften sowie die Eigenschaften der farbgebenden Elemente, z.B. der Reflektoren 17a und 17b, symmetrisch wählen.The two prism plates 21a and 21b may well have different light-directing properties, so that an overall asymmetric radiation of the colored light is achieved. Likewise, the mirrors 17a and 17b may be differently colored and / or each have different differently colored areas. If a symmetrical distribution of the colored light is desired, however, one will orient the two prism plates 21a and 21b in the same way and otherwise also the light-directing properties and the properties of the coloring elements, e.g. of the reflectors 17a and 17b, choose symmetrically.

Bei der dargestellten Ausführungsform kommen als farbgebende Elemente nicht nur die Spiegel 17a und 17b in Betracht, sondern insbesondere auch die Prismenplatten 21a und 21b, die, gegebenenfalls in Verbindung mit strahlbegrenzenden Elementen, wie Blenden oder dergleichen, eine bestimmte Wellenlänge oder einen bestimmten Wellenlängenbereich selektieren können. Eine Farbgebung kann statt durch Lichtbrechung, wie bei Prismen, auch durch Lichtbeugung, beispielsweise durch ein Gitter, ein Hologramm oder dergleichen, erzielt werden. Ebenso kann in dem Strahlengang des indirekt abgestrahlten Lichts zusätzlich oder alternativ zu den farbigen Spiegeln 17a und 17b ein farbiger Filter vorgesehen sein. Schließlich kann auch vorgesehen sein, daß in dem Strahlengang, insbesondere oberhalb der Prismenplatten 2 1 a oder 2 1 b, ein fluoreszierendes Element vorhanden ist, welches du rch weißes Licht zu Fluoreszenz angeregt wird und dadurch farbiges Licht abgibt.Not only the mirrors 17a and 17b are considered as coloring elements in the illustrated embodiment, but also, in particular, the prism plates 21a and 21b, which, optionally in combination with beam-limiting elements, such as diaphragms or the like, can select a specific wavelength or a specific wavelength range , Coloring can be achieved instead of refraction, as in prisms, also by diffraction of light, for example by a grating, a hologram or the like. Likewise, in addition to or as an alternative to the colored mirrors 17a and 17b, a colored filter can be provided in the beam path of the indirectly emitted light. Finally, it can also be provided that in the beam path, in particular above the prism plates 2 1 a or 2 1 b, a fluorescent element is present, which is excited into white light to fluoresce, thereby emitting colored light.

Anhand der Konstruktion der Fig. 1 kann man erkennen, daß die Abstrahlrichtung des weißen Lichts, welches von der Lampe 7 über die Reflektoröffnung 5 abgegeben wird, unabhängig von der Abstrahlrichtung des farbigen Lichts, welches über die Lichtaustrittsöffnungen 19a und 19b abgegeben wird, eingestellt und begrenzt werden kann. Insbesondere können die entsprechenden Abstrahlbereiche, wie in Fig. 2 schematisch dargestellt, so eingerichtet werden, daß ein Betrachter in einem Winkelbereich β weißes Licht sieht und in einem an diesen Winkelbereich anschließenden Winkelbereich α farbiges Licht sieht. Dabei kann der Winkelbereich β einem Arbeitsbereich entsprechen, der hell ausgeleuchtet werden soll, während die Lichtabstrahlung in dem Winkelbereich α der allgemeinen Hintergrundbeleuchtung bzw. dem Setzen von Farbakzenten dient. Auch die umgekehrte Konstellation ist möglich, wie in Fig. 3 gezeigt ist, d.h. in einen an die Vertikale anschließenden Winkelbereich α wird farbiges Licht abgegeben und an den daran anschließenden Winkelbereich bis zur Horizontalen wird weißes Licht abgegeben. Die Winkelbereiche α und β können natürlich, wie es die Beleuchtungsauf gabe erfordert, unterschiedlich eingestellt werden, wie dies auch Fig. 2 und 3 zeigen. Statt zwei Bereichen, wie in Fig. 2 und 3 dargestellt, können auch drei oder mehr Bereiche vorgesehen sein, in die jeweils Licht mit anderen Spektraleigenschaften abgestrahlt wird; ebenso kann das in den Winkelbereich β abgestrahlte Licht farbig sein und eine andere Farbe als das in den Winkelbereich α abgestrahlte Licht aufweisen.Based on the construction of the Fig. 1 It can be seen that the emission direction of the white light emitted from the lamp 7 via the reflector opening 5 can be adjusted and limited independently of the emission direction of the colored light emitted via the light exit openings 19a and 19b. In particular, the corresponding radiation areas, as in Fig. 2 shown schematically, are set up so that a viewer in an angular range β sees white light and sees in a subsequent to this angular range angle range α colored light. In this case, the angle range β can correspond to a work area which is to be brightly illuminated, while the light emission in the angle range α serves for the general background illumination or the setting of color accents. The reverse constellation is possible, as in Fig. 3 is shown, ie in an adjoining the vertical angle range α colored light is emitted and to the adjoining angle range to the horizontal white light is emitted. Of course, the angle ranges α and β can be set differently, as required by the lighting task, as well as this FIGS. 2 and 3 demonstrate. Instead of two areas, as in FIGS. 2 and 3 can be provided, three or more areas may be provided, in each of which light is emitted with other spectral properties; Likewise, the light radiated into the angular range β can be colored and have a different color than the light radiated into the angular range α.

Während in Fig. 2 und 3 die Winkelbereiche α und β der Klarheit halber als scharf abgegrenzte Winkelbereiche dargestellt sind, was auch bei Anwendungen, bei denen das weiße oder farbige Licht zu Markierungszwecken dient, etwa um einen bestimmten Raumbereich optisch abzugrenzen, durchaus sinnvoll ist, wird man in der Regel die Bereiche α und β überlappen lassen, so daß ein weicher optischer Übergang zwischen den Bereichen entsteht. Die Bereiche α und β können auch vollständig überlappen, um eine bestimmte Spektralcharakteristik, etwa zur Simulation von Tageslicht, zu erreichen.While in FIGS. 2 and 3 the angle ranges α and β for the sake of clarity are shown as sharply delimited angle ranges, which also makes sense in applications where the white or colored light is used for marking purposes, optically delimiting a certain spatial area, is usually the areas α and β overlap, so that a soft optical transition between the areas arises. The areas α and β can also overlap completely in order to achieve a specific spectral characteristic, for example for the simulation of daylight.

Die Prismenplatten 21a und 21b haben neben ihrer lichtlenkenden und gegebenenfalls auch farbgebenden Funktion auch die weitere Funktion, eine optische Tiefenwirkung zu erzeugen, d.h. ein Betrachter, der auf die Lichtaustrittsöffnungen 19a und 19b schaut, nimmt das Ende des Leuchtengehäuse, insbesondere die Wand 12, nicht wahr, sondern sieht nur eine einheitliche leuchtende Fläche scheinbar ohne Begrenzung in der Vertikalen. Dies hat den physiologisch vorteilhaften Effekt, daß sich die Augen des Betrachters auf einen Punkt im Unendlichen fokussieren und die Augenmuskeln sich daher beim Betrachten dieser Lichtaustrittsöffnungen entspannen. Dies ist ein ähnlicher Effekt, wie wenn ein Betrachter in den Himmel schaut. Dieser Effekt der Prismenscheiben 21a und 21b, einerseits transparent zu leuchten, andererseits sämtliche Konturen dahinter zum Verschwinden zu bringen, kann auch mit anderen Mitteln erreicht werden.The prism plates 21a and 21b have, in addition to their light-directing and possibly also coloring function, the further function of producing an optical depth effect, that is, an observer looking at the light exit openings 19a and 19b does not perceive the end of the luminaire housing, in particular the wall 12, but sees only a uniform luminous surface apparently without limitation in the vertical. This has the physiologically advantageous effect that the eyes of the observer focus on a point at infinity and the eye muscles therefore relax when viewing these light exit openings. This is a similar effect as when a viewer looks into the sky. This effect of the prismatic disks 21a and 21b, on the one hand transparent to light, on the other hand to make all contours behind disappear, can also be achieved by other means.

Die Funktion der Lichtlenkung und der Begrenzung des Abstrahlwinkels kann auch durch die Reflektoren 12, 15, 17a und 17b sowie den Rand eines Leuchtengehäuses erfüllt wenden.The function of the light control and the limitation of the emission angle can also be met by the reflectors 12, 15, 17a and 17b as well as the edge of a luminaire housing.

Fig.4 zeigt eine weitere Ausführungsform der Erfindung in einer Anwendung in Form einer Hängeleuchte. Bei dieser Ausführungsform ist wieder ein Hauptreflektor 51 vorgesehen, der in einem Leuchtengehäuse 53 aufgenommen ist und eine untere Lichtaustrittsöffnung 55 und eine obere Lichtaustrittsöffnung 57 aufweist. In dem Hauptreflektor 51 befindet sich eine weißes Licht abstrahlende Lampe 58. In der unteren Lichtaustrittsöffnung sind wieder in bekannter Weise Rasterlemente 59 zur Blendungsbegrenzung vorgesehen. Die obere Lichtaustrittsöffnung 57 ist ganz oder teilweise von einem lichtdurchlässigen farbgebenden Element 61 verschlossen, beispielsweise einem Filter, der das hindurchtretende Licht mit einer bestimmten Farbe färbt. Das nach oben durch die Öffnung 57 abgestrahlte Licht wird von einem reflektierenden Segel 63 nach unten zurückgeworfen. Das Segel 63 kann ggf. auch teilweise transparent ausgebildet sein. Die lichtlenkenden Eigenschaften der Leuchte hinsichtlich des farbigen Lichts werden in diesem Fall in erster Linie durch das reflektierende Segel 63 bestimmt, wobei die Form der oberen Lichtaustrittsöffnung 57 sowie gegebenenfalls auch die Form des Leuchtengehäuses 53 zu einer Strahlbegrenzung des farbigen Lichts beitragen. Figure 4 shows a further embodiment of the invention in an application in the form of a suspension lamp. In this embodiment, a main reflector 51 is again provided, which is accommodated in a lamp housing 53 and has a lower light exit opening 55 and an upper light exit opening 57. In the main reflector 51 is a white light emitting lamp 58. In the lower light exit opening raster elements 59 are provided for glare limitation again in a known manner. The upper light exit opening 57 is completely or partially closed by a light-transmitting coloring element 61, for example a filter, which dyes the light passing through with a specific color. The light emitted upward through the opening 57 is reflected back by a reflecting sail 63. The sail 63 may possibly also be partially transparent. The light-directing properties of the lamp with respect to the colored light are determined in this case primarily by the reflective sail 63, wherein the shape of the upper light exit opening 57 and possibly also the shape of the lamp housing 53 contribute to a beam limitation of the colored light.

Zusätzlich oder alternativ zu den farbgebenden Elementen 61 kann auch ein gefärbtes Segel 63 verwendet werden. Es kann auch vorgesehen sein, daß das Segel 63 in Bereichen, welche in unterschiedliche Raumbereiche reflektieren, unterschiedlich gefärbt ist.In addition or as an alternative to the coloring elements 61, a colored sail 63 may also be used. It can also be provided that the sail 63 is colored differently in areas which reflect in different spatial areas.

Im Rahmen der Erfindung können hinsichtlich der vorangehend beschriebenen Ausführungsbeispiele zahlreiche Abwandlungen oder Änderungen vorgesehen sein. Beispielsweise können die Eigenschaften der Lichtlenkung, der Farbgebung sowie der Erzeugung der vorangehend beschriebenen optischen Tiefenwirkung durch ein einzelnes Element, beispielsweise ein Prisma oder ein Beugungsgitter erreicht werden. Die verschiedenen Funktionen können jedoch einzeln oder in Unterkombination auch von verschiedenen Elementen wahrgenommen werden. Weiterhin können die farbgebenden Elemente auch eine vollständige Spektralzerlegung bewirken, so daß sich die Farbe kontinuierlich in Abhängigkeit von einem Winkel ändert. Dieser Winkel kann insbesondere ein Winkel in einer Ebene sein, welche die vertikale Achse einschließt. Er kann jedoch auch ein Winkel sein, der in einer Ebene senkrecht zu der Vertikalen liegt, so daß ein Betrachter, der in einem Kreis um die Lampe herumgeht, dabei unterschiedliche Farben in verschiedenen Positionen sieht. Während vorangehend Ausführungsformen mit einer einzigen Lampe beschrieben wurden, ist die Erfindung hierauf nicht beschränkt und umfaßt auch mehrlampige Ausführungsformen.In the context of the invention, numerous modifications or changes may be made with regard to the embodiments described above. For example, the properties of the light guidance, the coloring as well as the generation of the above-described optical depth effect can be achieved by a single element, for example a prism or a diffraction grating. However, the different functions can be perceived individually or in subcombination also by different elements. Furthermore, the coloring elements can also cause a complete spectral decomposition, so that the color changes continuously as a function of an angle. In particular, this angle may be an angle in a plane enclosing the vertical axis. However, it may also be an angle perpendicular to the vertical in a plane such that a viewer walking in a circle around the lamp sees different colors in different positions. While previously described embodiments with a single lamp, the invention is not limited thereto and also includes multi-lamp embodiments.

BEZUGSZEICHENLISTELIST OF REFERENCE NUMBERS

11
DeckeneinbauleuchteDownlight
33
Hauptreflektormain reflector
55
LichtaustrittsöffnungLight opening
77
Lampelamp
99
Rasterelementgrid element
1111
Leuchtengehäuseluminaire housing
1212
Wand des LeuchtengehäusesWall of the luminaire housing
1313
LichtaustrittsöffnungLight opening
1515
Dachreflektortop reflector
17a, 17b17a, 17b
Spiegelmirror
19a, 19b19a, 19b
LichtaustrittsöffnungLight opening
21a, 21b21a, 21b
Prismenplatteprism plate
5151
Hauptreflektormain reflector
5353
Leuchtengehäuseluminaire housing
5555
LichtaustrittsöffnungLight opening
5757
LichtaustrittsöffnungLight opening
5858
Lampelamp
5959
Rasterelementgrid element
6161
Farbgebendes ElementColoring element
6363
Reflektierendes SegelReflective sail
α, βα, β
AbstrahlwinkelBeam

Claims (10)

  1. Luminaire having a lamp (7; 58) and a light exit opening (5; 55) via which light from the lamp (7; 58) is output in a substantially directly radiating fashion, and a device (3; 51) which splits the light output by the lamp into at least two separate beams, which are respectively directed in accordance with different beam paths, there being present at least in a first beam path a wavelength-selective element (17a; 17b; 61) which has a colouring or colour-varying effect, whereas no such element or an element having other wavelength-selective properties is present at least in a second beam path which includes said light exit opening (5; 55) such that the light which is output by the luminaire via the first beam path differs in colour from the light which is output via the second beam path, light from the first beam path being directed to a light exit surface (19a, 19b; 63) that differs from said light exit opening (5; 55), characterized in that the direction of radiation of the light which is radiated via the first beam path, and the direction of radiation of the light which is radiated via the second beam path are limited in such a way that the angular range (α) into which light is radiated via the first beam path overlaps partially with the angular range (β) into which light is radiated via the second beam path, or adjoins that angular range (β) into which light is radiated via the second beam path, and differs therefrom.
  2. Luminaire according to Claim 1, characterized by a main reflector (3; 51) in which the lamp (7; 58) is arranged and which fixes a light exit opening (5; 55) of the luminaire via which light from the lamp is output in a substantially directly radiating fashion.
  3. Luminaire according to Claim 2, characterized in that a portion of the light from the lamp (7; 57) is irradiated onto a secondary reflector (12, 15, 17a, 17b; 63) and is reflected by the latter, a wavelength-selective element (17a, 17b; 61) being provided in the beam path which includes the secondary reflector (12, 15, 17a, 17b; 63) whereas no wavelength-selective element is present in the beam path of the lamp to said first light exit opening (5; 55).
  4. Luminaire according to one of Claims 1 to 3, characterized by a diffuser element (21a, 21b; 31a, 31b; 63) in the first beam path which equalizes differences in intensity in the light irradiated thereupon.
  5. Luminaire according to Claim 4, characterized in that the diffuser element (21a, 21b; 31a, 31b; 63) is at least partially transparent.
  6. Luminaire according to one of Claims 1 to 5, characterized in that the spectral properties of the light radiated via the first beam path vary as a function of a radiation angle which lies in a plane perpendicular to the luminaire axis.
  7. Luminaire according to one of Claims 1 to 6, characterized in that provided in one of the beam paths is an element which simultaneously fulfils a light-directing and wavelength-selective function in the beam path.
  8. Luminaire according to one of Claims 1 to 7, characterized by a device for selective blocking of a beam path which includes a wavelength-selective element.
  9. Luminaire according to one of Claims 1 to 8, characterized in that the selection properties of the wavelength-selective element are variable.
  10. Luminaire according to one of Claims 1 to 9, characterized in that light essentially with the spectral properties of the lamp (7; 58) is output via the second beam path, and coloured light is output via the first beam path, the light flux component of the second beam path being greater than that of the first beam path.
EP00104273A 1999-03-03 2000-03-01 Lamp with multiple spectral characteristics Expired - Lifetime EP1033530B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19909331 1999-03-03
DE19909331A DE19909331C2 (en) 1999-03-03 1999-03-03 Luminaire with multiple spectral properties

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EP1033530A2 EP1033530A2 (en) 2000-09-06
EP1033530A3 EP1033530A3 (en) 2001-11-21
EP1033530B1 true EP1033530B1 (en) 2008-05-28

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AT (1) ATE397188T1 (en)
DE (2) DE19909331C2 (en)

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Publication number Priority date Publication date Assignee Title
DE10011304B4 (en) * 2000-03-09 2011-05-05 Siteco Beleuchtungstechnik Gmbh Luminaire with inhomogeneous light emission
DE10163960A1 (en) * 2001-12-23 2003-07-03 Der Kluth Decke Und Licht Gmbh Illumination arrangement for optical quality control of surfaces has illumination source and matt plate arranged so matt plate is uniformly illuminated by illumination source
DE10163958A1 (en) * 2001-12-23 2003-07-03 Der Kluth Decke Und Licht Gmbh lighting device
DE10207585A1 (en) * 2002-02-22 2004-01-22 Regiolux Gmbh Illumination device with paper reflector element has at least sectional colored paper reflector elements on inner wall of housing at which light radiated by light source is at least partly reflected
DE20306736U1 (en) * 2003-04-30 2004-09-16 Zumtobel Staff Gmbh lamp
DE10360947A1 (en) * 2003-12-23 2005-07-21 Engel, Hartmut S. recessed light
DE10360945A1 (en) * 2003-12-23 2005-07-21 Engel, Hartmut S. recessed light
US7258467B2 (en) 2004-03-12 2007-08-21 Honeywell International, Inc. Low profile direct/indirect luminaires
FI122909B (en) * 2008-01-07 2012-08-31 Naplit Show Oy Lighting elements
EP2718612B1 (en) 2011-07-08 2016-09-14 Philips Lighting Holding B.V. Glowing luminaire housing with phosphor
CN103688105B (en) * 2011-07-20 2017-02-22 皇家飞利浦有限公司 A lighting element, a lighting system and a luminaire providing a skylight appearance

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Publication number Priority date Publication date Assignee Title
GB1372024A (en) * 1970-10-07 1974-10-30 Oram J A Lighting device
DE4413460A1 (en) * 1994-04-18 1995-10-19 Swarovski & Co lamp
DE4443916C1 (en) * 1994-12-09 1996-05-09 Zumtobel Licht Reflector arrangement for light with at least one elongated lamp
DE19620659C2 (en) * 1996-05-22 2002-06-27 Zumtobel Licht Luminaire with a light exit disc
DE29710475U1 (en) * 1997-06-10 1997-08-14 Semperlux GmbH Lichttechnisches Werk, 12277 Berlin Interior light

Also Published As

Publication number Publication date
EP1033530A2 (en) 2000-09-06
DE50015177D1 (en) 2008-07-10
DE19909331A1 (en) 2000-09-14
EP1033530A3 (en) 2001-11-21
DE19909331C2 (en) 2002-05-16
ATE397188T1 (en) 2008-06-15

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