EP2058587B1 - Bath light with indirect share of light - Google Patents

Bath light with indirect share of light Download PDF

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Publication number
EP2058587B1
EP2058587B1 EP08019624A EP08019624A EP2058587B1 EP 2058587 B1 EP2058587 B1 EP 2058587B1 EP 08019624 A EP08019624 A EP 08019624A EP 08019624 A EP08019624 A EP 08019624A EP 2058587 B1 EP2058587 B1 EP 2058587B1
Authority
EP
European Patent Office
Prior art keywords
housing
housing base
light
lighting fixture
translucent
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.)
Not-in-force
Application number
EP08019624A
Other languages
German (de)
French (fr)
Other versions
EP2058587A1 (en
Inventor
Christoph Schumacher
Kilian Englert
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.)
Osram SBT GmbH
Original Assignee
Siteco Beleuchtungstechnik GmbH
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 Siteco Beleuchtungstechnik GmbH filed Critical Siteco Beleuchtungstechnik GmbH
Publication of EP2058587A1 publication Critical patent/EP2058587A1/en
Application granted granted Critical
Publication of EP2058587B1 publication Critical patent/EP2058587B1/en
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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
    • 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
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • 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
    • F21V5/02—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
    • F21Y2113/00—Combination of light sources

Definitions

  • the present invention relates to trough lamps, in particular trough lamps, which allow for the production of indirect lighting a light exit in the direction of the mounting side of the lamp to lighten the ceiling or wall on which the lamp is mounted.
  • a lamp of the type mentioned is, for example, in the FIG. 1 shown.
  • the lamp comprises a housing base part 2 and a transparent housing cover 5.
  • the light of the lamp 1 can pass not only through the transparent cover 5, but also through the housing base part 2.
  • the illustrated light beam 8 is used to produce an indirect illumination in the direction of the ceiling or wall to which the lamp is attached.
  • a wet room lamp with a two-part closed housing the housing base part consists of a translucent material, is made of EP 0 726 420 A1 known.
  • EP 1 847 766 A1 is known an interior light, which has room and ceiling side light exit surfaces.
  • the luminaire comprises a carrier hollow profile, which has two fluorescent lamps laterally, which are surrounded by closed light guiding chambers. Above the fluorescent lamps, a transparent cover is provided which has a structuring on the side facing the lamps. For deflecting the light emerging from the transparent covers, separate light distribution wings (8) are provided on the carrier profile, which are adjustable in particular in the inclination relative to the vertical center plane of the carrier hollow profile.
  • the lamp is preferably suspended from the end parts.
  • Out DE 79 10 659 U1 is a pendant lamp with a partially upwardly radiating optics known.
  • the pendant lamp has a downwardly reflecting mirror optics, which has a longitudinal slot in its upper third, so that part of the radiation of a light source can escape upwards.
  • lenses are arranged, for example in the form of a prismatic disc.
  • the object is achieved by a luminaire according to claim 1.
  • the invention provides a luminaire with a housing which comprises a GeHousebasisteil and a translucent housing cover, which enclose an interior of the housing, wherein at least one lamp is disposed in the interior of the housing and the Housing base part on the side facing away from the light source has a mounting side for fixing the lamp, wherein the housing base part has at least a portion which is formed of a translucent material, passes through the light of the bulb for generating an indirect illumination.
  • light-refracting structures are arranged on the translucent subregion of the housing base part, which deflect the light passing through the subarea in a direction away from the mounting side.
  • the invention is based on the observation that the illumination of a room can be improved by the indirect portion of the light radiation which the luminaire generates, if the indirect part is further distributed in the depth of the room.
  • the luminaire according to the invention provides light-guiding structures in the light passage region of the housing base part, which deflect the light in such a way that the ceiling or wall on which the luminaire is mounted is illuminated over a larger area.
  • the refractive structures have a constant cross-section in a cross-section perpendicular to a longitudinal extension of the luminous means over at least part of the longitudinal extent.
  • This embodiment is particularly advantageous for linear luminaires, which have an elongated luminous means, such as one or more fluorescent tubes. Due to the constant cross-section of the refractive structures, the indirect component of the light is redirected in the desired direction over the entire length of the luminaire.
  • the thickness of the refractive structures decreases in each case in the cross section perpendicular to the longitudinal extent of the luminous means, from the side remote from the mounting side to the side facing the mounting side.
  • the light-directing structures which are formed for example of a transparent plastic, such as PMMA or PU, or of glass, the desired deflection can be generated in the direction away from the mounting side.
  • the refractive structures are formed by prism elements.
  • the prism elements may extend, for example, parallel to the longitudinal extent of the luminous means on the translucent subregion of the housing base part.
  • other refractive structures such as cones or truncated cones, pyramids or truncated pyramids, grooves or lenses may be provided on the housing base part for deflecting the light.
  • prism elements which have two asymmetrical legs.
  • the base side of the prism element is planar to the surface which is defined by the translucent part of the housing base part.
  • the asymmetrical legs form a protrusion of the translucent portion of the housing base part.
  • the shorter leg can be arranged on the side facing away from the mounting side of the prism and the longer of the two legs can be arranged on the side facing the mounting side of the prism.
  • a plurality, in particular of identical cross-section may be provided, which extend parallel to one another in the translucent subregion of the housing base part.
  • the refractive structures are preferably arranged on the side of the housing base part facing the interior.
  • the housing base part may be smooth on the outside, so that the housing is easier to clean from the outside, because there are no uneven structures on the outside.
  • the housing base part has at least two translucent sections with refractive structures which extend on both sides of the mounting side of the housing base section.
  • refractive structures may be arranged mirror-symmetrically with respect to a sectional plane which runs perpendicular to the mounting side of the luminaire in the longitudinal direction of the luminaire. In the case of a ceiling light, this corresponds to the vertical plane.
  • the housing base part is substantially completely formed of a light-transmitting material.
  • the housing base may be formed entirely of glass or a plastic material, except for electrical components or internals disposed on the inside of the housing base.
  • Such a housing can be produced inexpensively and also has the advantage on that the housing has a uniform coefficient of expansion, so that when heating the housing by the operation of the lamps no stresses in the material occur.
  • the refractive structures may be formed integrally with the housing base part or at least with the translucent portion of the housing base part.
  • a reflector is arranged in the interior of the housing between the housing base part and the lighting means.
  • the reflector primarily provides a light direction in the direction of the main emission of the lamp for direct illumination through the transparent housing cover.
  • the reflector is set up so that light passes from the luminous means on a straight path past the reflector and through an opening in the reflector to the translucent portion of the housing base part. This proportion of light provides the desired indirect lighting.
  • the reflector may include one or more reflective surfaces arranged to reflect light from the bulb to the translucent portion of the barrel base.
  • the indirect component of the light radiation can be formed either directly by the illuminant and / or by reflection at the reflector.
  • the indirect radiation passes through the translucent portion of the housing base portion on which the refractive structures are arranged to achieve the desired light distribution.
  • the light radiation which impinges on the reflector on the translucent portion of the housing base part hits in a shallower angle relative to the mounting side of the housing base part on the translucent portion than that light radiation which impinges on the same location of the translucent portion without reflection on the reflector.
  • the angles are determined in a cross-sectional area perpendicular to the longitudinal extent of the lamp.
  • the housing of the lamp is completely closed.
  • it may be a wet room light, which is sealed against penetrating moisture, jet water or spray water.
  • An embodiment of the luminaire can realize, for example, the degree of protection IP 65 according to EN60598-1 in the version from the year 2004.
  • the translucent portions of the housing base portion or the complete housing base portion are provided with a color filter, e.g. by coloring the material of the housing base part or by applying a correspondingly colored coating.
  • a colored indirect portion of the light is generated.
  • the colored deposition of the indirect component not only provides an appealing aesthetic impression, but this component can also fulfill the technical function, such as, e.g. a signal effect.
  • the color of the indirect light component can be adapted to the spectral reflection properties of the wall or ceiling color to provide a particularly efficient indirect lighting of the room.
  • a trough-shaped housing base part 2 defines a downwardly open shape in cross section. In the upper area, the housing base part is approximately U-shaped. In this area, electrical components (not shown) may be arranged.
  • the housing base part 2 is closed by a transparent housing cover 5 down.
  • the transparent housing cover 5 is likewise trough-shaped and terminates with the housing base part 2 a completely closed interior.
  • a seal 6 may be provided, which ensures a dust-tight or moisture-tight closure between the housing base part 2 and the transparent housing cover 5.
  • the housing base part 2 and the housing cover 5 may, for example, be connected to one another with clips on the outside. Alternatively, a latching connection may also be provided or, in addition, a hinge may be provided on at least one longitudinal side (not shown in the figures).
  • a light source 1 is arranged in the interior defined by the housing base part 2 and the transparent housing cover 5, a light source 1 is arranged.
  • the light source 1 is in the FIG. 1 shown in cross section. It is a tubular fluorescent lamp, which is socketed in the interior of the lamp at the longitudinal ends.
  • the light emanating from the light source 1 predominantly passes through the transparent housing cover 5.
  • the transparent housing cover 5 has a corrugation on the inside, which ensures a scattering of light passing through the housing cover.
  • the proportion of the light radiation which passes through the transparent housing cover 5 forms a large part of the luminous flux of the luminaire, which is intended for direct illumination.
  • a part of the luminous flux which is shown in the figures as a light beam 8 also passes through the housing base part.
  • the housing base part is completely formed in the embodiment shown from a transparent plastic, so that the passage of light is made possible.
  • refractive structures 10 arranged in the area next to the U-shaped portion of the housing base part and the connecting edge to the housing cover 5 in the area next to the U-shaped portion of the housing base part and the connecting edge to the housing cover 5 are on the inside of the housing base part 2 refractive structures 10 arranged.
  • the mode of action of the refractive structures 10 will be described with reference to FIGS FIGS. 6 to 8 , which illustrate the corresponding section of the housing base part 2, explained. Without the refractive structures, as in the FIG. 6 shown, the light passes through the housing cover substantially in a straight line.
  • the luminaire according to the invention has light-refracting structures 10 on the inside.
  • These are prism elements which extend in the longitudinal direction of the luminaire parallel to the luminous means on the inside of the housing base part 2.
  • the prism elements have two to the interior of the luminaire facing legs 11 and 12.
  • the leg 11 points in the direction of the mounting side 3 of the lamp, while the leg 12 is arranged on the side facing away from the mounting side of the prism 10.
  • a light beam which is approximately perpendicular to the housing base part, from the original direction (shown in phantom in the figure) is broken.
  • the leg 12 is formed slightly shorter than the leg 11. Furthermore, the leg 12 extends approximately parallel to a radial line, which emanates from the lamp and impinges on the housing cover. As a result, less light passes through the leg 12 as compared to the leg 11. In general, the thickness of the prismatic element decreases from the side facing away from the luminaire mounting side 3, ie from the leg 12, to the side facing the luminaire mounting side 3, ie along the leg 11. This shape and the arrangement relative to the light source, the desired deflection effect is achieved.
  • FIG. 8 shows an alternative embodiment of the refractive structure 10.
  • the leg 11 ' is approximately equal to the leg 12'.
  • the same deflection effect as previously described, achieved.
  • FIG. 5 The total light distribution which is produced by an embodiment of the luminaire according to the invention is in FIG. 5 shown in a polar diagram.
  • FIG. 4 a polar diagram of the luminous intensity distribution of a luminaire without refractive structures 10.
  • the light distribution shows two pronounced maxima 13 in the direction of the main emission of the luminaire, which form the direct component of the light intensity. This light is essentially generated by the proportion of the light passing through the transparent housing cover 5.
  • the light distribution of the indirect component 14 can be seen on the opposite side of the main maxima 13, ie on the side facing the mounting side of the lamp.
  • FIGS. 4 and 5 shows that the indirect portion 14 of a lamp according to the present invention (see. FIG. 5 ) wider and flatter than in a lamp according to the prior art (see. FIG. 4 ).
  • This effect is caused by the refractive structure 10 on the housing base side 2 and allows a large-scale and uniform illumination of the ceiling to which the lamp is mounted.
  • FIG. 3 shows a cross section through an alternative embodiment of the lamp according to the invention. This is a two-lamp lamp. The corresponding components are denoted by the same reference numerals as in FIG FIG. 2 designated.
  • a reflector 15 is arranged between the one or more lamps 1 of the lamp and the housing base part 5. A significant proportion of the light radiation from the light source (s) is directed by the reflector 15 in the direction of the transparent housing cover 5.
  • laterally angled portions 16 are provided on the reflector 15, which also reflect light to the portions of the housing base part 2, which are provided with the refractive structures 10.
  • the effect of the reflector sections 16 of the reflector 15 is based on the light beam 8 'in connection with FIG. 3 explained.
  • the light radiation 8 ' which emanates from a luminous means 1 and is reflected at the reflector portion 16, impinges on the refractive structure 10 at a shallower angle compared to the light radiation which impinges on the same location but without reflection at the reflector portion 16.
  • Due to the reflection in the reflector section 16, the light beam 8 ' is already deflected in the direction away from the luminaire mounting side 3 by reflection at the reflector section 16.
  • This effect is reinforced by the subsequent refraction of the refractive structure 10 again.
  • an even greater width distribution of the portion of the light distribution curve forming the indirect component 14 is produced by the light beam 8 '.
  • the translucent portions of the housing base portion 2, which are provided with the refractive structures 10, are located relative to a cross section perpendicular to the longitudinal extent of the lamp above the one or more lamps 1 and below the mounting surface 3.
  • an angular range of 5 ° to 85 °, preferably 20 ° to 80 °, above a flat sectional surface, parallel to the mounting side 3 and by the light source 1 for the arrangement of refractive structures preferred is preferred.
  • the refractive structures 10 may also be formed with a different geometry in order to bring about the desired effect.
  • the refractive structure may be provided on the outside of the luminaire.

Abstract

The lighting fixture has a housing, which has a housing base (2) and a translucent housing cover (5) enclosing the interior of the housing. An illuminant (1) is arranged in the interior of the housing. The housing base has a mounted side (3) for fixing the lighting fixture on the averted side of illuminant. The base has a subarea formed from a translucent material for producing indirect lighting by the light of illuminant. The refractive structures (10) are arranged at the translucent subarea of the base, where the subarea diverts the light in a direction away from the mounted side.

Description

Die vorliegende Erfindung betrifft Wannenleuchten, insbesondere Wannenleuchten, die zur Erzeugung einer Indirektbeleuchtung einen Lichtaustritt in Richtung zur Anbauseite der Leuchte ermöglichen, um die Decke oder Wand, an der die Leuchte montiert ist, aufzuhellen.The present invention relates to trough lamps, in particular trough lamps, which allow for the production of indirect lighting a light exit in the direction of the mounting side of the lamp to lighten the ceiling or wall on which the lamp is mounted.

Eine Leuchte der eingangs genannten Art ist beispielsweise in der Figur 1 dargestellt. Die Leuchte umfaßt ein Gehäusebasisteil 2 und eine transparente Gehäuseabdeckung 5. Das Licht der Lampe 1 kann nicht nur durch die transparente Abdeckung 5 hindurchtreten, sondern auch durch das Gehäusebasisteil 2. Das dargestellte Lichtstrahlenbündel 8 dient zur Erzeugung einer indirekten Beleuchtung in Richtung zu der Decke oder Wand, an der die Leuchte befestigt ist.A lamp of the type mentioned is, for example, in the FIG. 1 shown. The lamp comprises a housing base part 2 and a transparent housing cover 5. The light of the lamp 1 can pass not only through the transparent cover 5, but also through the housing base part 2. The illustrated light beam 8 is used to produce an indirect illumination in the direction of the ceiling or wall to which the lamp is attached.

Eine Feuchtraumleuchte mit einem zweiteiligen geschlossenen Gehäuse, dessen Gehäusebasisteil aus einem lichtdurchlässigen Material besteht, ist aus der EP 0 726 420 A1 bekannt.A wet room lamp with a two-part closed housing, the housing base part consists of a translucent material, is made of EP 0 726 420 A1 known.

Insbesondere wenn die Leuchte nach dem Stand der Technik direkt an einer Wand oder Decke mit der Anbauseite montiert ist, ist die Lichtverteilung, wie sie an der Decke oder Wand erzeugt wird, nicht zufriedenstellend.In particular, when the prior art luminaire is mounted directly on a wall or ceiling with the mounting side, the light distribution as generated on the ceiling or wall is not satisfactory.

Aus EP 1 847 766 A1 ist eine Innenraumleuchte bekannt, welche raum- und deckenseitige Lichtaustrittsflächen aufweist. Die Leuchte umfasst ein Trägerhohlprofil, welches seitlich zwei Leuchtstofflampen aufweist, die von geschlossenen Lichtführungskammern umgeben sind. Oberhalb der Leuchtstofflampen ist eine transparente Abdeckung vorgesehen, welche auf der zu den Lampen weisenden Seiten eine Strukturierung aufweist. Zum Umlenken des aus den transparenten Abdeckungen austretenden Lichts sind separate Lichtverteilungsflügel (8) an dem Trägerprofil vorgesehen, welche insbesondere in der Neigung relativ zur vertikalen Mittelebene des Trägerhohlprofils verstellbar sind. Die Leuchte wird bevorzugt an den Endteilen aufgehängt.Out EP 1 847 766 A1 is known an interior light, which has room and ceiling side light exit surfaces. The luminaire comprises a carrier hollow profile, which has two fluorescent lamps laterally, which are surrounded by closed light guiding chambers. Above the fluorescent lamps, a transparent cover is provided which has a structuring on the side facing the lamps. For deflecting the light emerging from the transparent covers, separate light distribution wings (8) are provided on the carrier profile, which are adjustable in particular in the inclination relative to the vertical center plane of the carrier hollow profile. The lamp is preferably suspended from the end parts.

Aus DE 79 10 659 U1 ist eine Pendelleuchte mit einer teilweise nach oben strahlenden Optik bekannt. Die Pendelleuchte besitzt eine nach unten strahlende Spiegeloptik, die in ihrem oberen Drittel einen Längsschlitz aufweist, so dass ein Teil der Strahlung eines Leuchtmittels nach oben austreten kann. In dem Längsschlitz sind Streuscheiben, z.B. in Form einer Prismenscheibe, angeordnet.Out DE 79 10 659 U1 is a pendant lamp with a partially upwardly radiating optics known. The pendant lamp has a downwardly reflecting mirror optics, which has a longitudinal slot in its upper third, so that part of the radiation of a light source can escape upwards. In the longitudinal slot lenses are arranged, for example in the form of a prismatic disc.

Es ist die Aufgabe der vorliegenden Erfindung, eine Leuchte der eingangs genannten Art im Hinblick auf die erzeugte Lichtverteilung, insbesondere für den Teil des Lichts, der zur indirekten Beleuchtung beiträgt, zu optimieren.It is the object of the present invention to optimize a luminaire of the type mentioned above with regard to the light distribution generated, in particular for the part of the light which contributes to the indirect illumination.

Die Aufgabe wird gelöst durch eine Leuchte gemäß Anspruch 1. Die Erfindung sieht eine Leuchte vor mit einem Gehäuse, welches ein Gehäusebasisteil und eine lichtdurchlässige Gehäuseabdeckung umfaßt, die einen Innenraum des Gehäuses umschließen, wobei wenigstens ein Leuchtmittel in dem Innenraum des Gehäuses angeordnet ist und das Gehäusebasisteil auf der dem Leuchtmittel abgewandten Seite eine Anbauseite zum Befestigen der Leuchte aufweist, wobei das Gehäusebasisteil wenigstens einen Teilbereich aufweist, der aus einem lichtdurchlässigen Material gebildet ist, durch den Licht des Leuchtmittels zur Erzeugung einer indirekten Beleuchtung hindurchtritt. Erfindungsgemäß sind an dem lichtdurchlässigen Teilbereich des Gehäusebasisteils lichtbrechende Strukturen angeordnet, welche das durch den Teilbereich hindurchtretende Licht in eine Richtung von der Anbauseite weg ablenken.The object is achieved by a luminaire according to claim 1. The invention provides a luminaire with a housing which comprises a Gehäusebasisteil and a translucent housing cover, which enclose an interior of the housing, wherein at least one lamp is disposed in the interior of the housing and the Housing base part on the side facing away from the light source has a mounting side for fixing the lamp, wherein the housing base part has at least a portion which is formed of a translucent material, passes through the light of the bulb for generating an indirect illumination. According to the invention, light-refracting structures are arranged on the translucent subregion of the housing base part, which deflect the light passing through the subarea in a direction away from the mounting side.

Der Erfindung liegt die Beobachtung zugrunde, daß die Ausleuchtung eines Raumes durch den indirekten Anteil der Lichtstrahlung, den die Leuchte erzeugt, verbessert werden kann, wenn der indirekte Teil weiter in die Tiefe des Raums verteilt wird. Dazu sieht die erfindungsgemäße Leuchte lichtlenkende Strukturen in dem Lichtdurchtrittsbereich des Gehäusebasisteils vor, welche das Licht so umlenken, daß die Decke oder Wand, an der die Leuchte montiert ist, über einen größeren Bereich ausgeleuchtet wird.The invention is based on the observation that the illumination of a room can be improved by the indirect portion of the light radiation which the luminaire generates, if the indirect part is further distributed in the depth of the room. For this purpose, the luminaire according to the invention provides light-guiding structures in the light passage region of the housing base part, which deflect the light in such a way that the ceiling or wall on which the luminaire is mounted is illuminated over a larger area.

Gemäß einer bevorzugten Ausführungsform weisen die lichtbrechenden Strukturen in einem Querschnitt senkrecht zu einer Längserstreckung des Leuchtmittels wenigstens über einen Teil der Längserstreckung einen konstanten Querschnitt auf. Diese Ausführungsform ist insbesondere für Langfeldleuchten von Vorteil, die ein längliches Leuchtmittel, wie beispielsweise ein oder mehrere Leuchtstoffröhren, aufweisen. Durch den konstanten Querschnitt der lichtbrechenden Strukturen wird über die gesamte Länge der Leuchte der Indirektanteil des Lichts in die gewünschte Richtung umgelenkt.According to a preferred embodiment, the refractive structures have a constant cross-section in a cross-section perpendicular to a longitudinal extension of the luminous means over at least part of the longitudinal extent. This embodiment is particularly advantageous for linear luminaires, which have an elongated luminous means, such as one or more fluorescent tubes. Due to the constant cross-section of the refractive structures, the indirect component of the light is redirected in the desired direction over the entire length of the luminaire.

Gemäß einer Ausführungsform nimmt die Dicke der lichtbrechenden Strukturen jeweils in dem Querschnitt senkrecht zur Längserstreckung des Leuchtmittels, von der der Anbauseite abgewandten Seite zu der der Anbauseite zugewandten Seite ab. Durch diese Form der lichtlenkenden Strukturen, welche beispielsweise aus einem transparenten Kunststoff, wie PMMA oder PU, oder aus Glas gebildet sind, kann die gewünschte Ablenkung in Richtung von der Anbauseite weg erzeugt werden.According to one embodiment, the thickness of the refractive structures decreases in each case in the cross section perpendicular to the longitudinal extent of the luminous means, from the side remote from the mounting side to the side facing the mounting side. By this form of the light-directing structures, which are formed for example of a transparent plastic, such as PMMA or PU, or of glass, the desired deflection can be generated in the direction away from the mounting side.

Gemäß einer Ausführungsform der Leuchte sind die lichtbrechenden Strukturen durch Prismenelemente gebildet. Die Prismenelemente können sich beispielsweise parallel zu der Längserstreckung des Leuchtmittels an dem lichtdurchlässigen Teilbereich des Gehäusebasisteils verlaufen. Neben Prismenelementen können auch andere lichtbrechende Strukturen wie Kegel oder Kegelstümpfe, Pyramiden oder Pyramidenstümpfe, Rillen oder Linsen an dem Gehäusebasisteil zur Ablenkung des Lichts vorgesehen sein.According to one embodiment of the luminaire, the refractive structures are formed by prism elements. The prism elements may extend, for example, parallel to the longitudinal extent of the luminous means on the translucent subregion of the housing base part. In addition to prism elements, other refractive structures such as cones or truncated cones, pyramids or truncated pyramids, grooves or lenses may be provided on the housing base part for deflecting the light.

Bei der Verwendung von Prismenelementen als lichtbrechende Strukturen sind besonders Prismenelemente bevorzugt, welche zwei asymmetrische Schenkel aufweisen. Die Basisseite des Prismenelements ist dabei plan zu der Fläche, die durch den lichtdurchlässigen Teil des Gehäusebasisteils definiert wird. Die asymmetrischen Schenkel bilden eine Erhebung von dem lichtdurchlässigen Teilbereich des Gehäusebasisteils. Insbesondere kann der kürzere Schenkel auf der der Anbauseite abgewandten Seite des Prisma angeordnet sein und der längere der beiden Schenkel kann auf der der Anbauseite zugewandten Seite des Prisma angeordnet sein. Von derartigen Prismenelement können mehrere, insbesondere mit identischem Querschnitt, vorgesehen sein, die sich parallel zueinander in dem lichtdurchlässigen Teilbereich des Gehäusebasisteils erstrecken.When prism elements are used as refractive structures, particular preference is given to prism elements which have two asymmetrical legs. The base side of the prism element is planar to the surface which is defined by the translucent part of the housing base part. The asymmetrical legs form a protrusion of the translucent portion of the housing base part. In particular, the shorter leg can be arranged on the side facing away from the mounting side of the prism and the longer of the two legs can be arranged on the side facing the mounting side of the prism. Of such a prism element, a plurality, in particular of identical cross-section, may be provided, which extend parallel to one another in the translucent subregion of the housing base part.

Vorzugsweise sind die lichtbrechenden Strukturen auf der dem Innenraum zugewandten Seite des Gehäusebasisteils angeordnet. Demgegenüber kann das Gehäusebasisteil auf der Außenseite glatt sein, so daß sich das Gehäuse von außen leichter reinigen läßt, weil auf der Außenseite keine unebenen Strukturen vorhanden sind.The refractive structures are preferably arranged on the side of the housing base part facing the interior. On the other hand, the housing base part may be smooth on the outside, so that the housing is easier to clean from the outside, because there are no uneven structures on the outside.

Gemäß einer bevorzugten Ausführungsform weist das Gehäusebasisteil wenigstens zwei lichtdurchlässige Teilbereiche mit lichtbrechenden Strukturen auf, die sich zu beiden Seiten der Anbauseite des Gehäusebasisteils erstrecken. Derartige Leuchten erzeugen die gewünschte indirekte Beleuchtung auf beiden Seiten der Leuchte. Insbesondere können die lichtbrechenden Strukturen spiegelsymmetrisch bezüglich einer Schnittebene angeordnet sein, die senkrecht zu der Anbauseite der Leuchte in Leuchtenlängsrichtung verläuft. Im Falle einer Deckenleuchte entspricht das der Vertikalebene.According to a preferred embodiment, the housing base part has at least two translucent sections with refractive structures which extend on both sides of the mounting side of the housing base section. Such lights produce the desired indirect lighting on both sides of the light. In particular, the refractive structures may be arranged mirror-symmetrically with respect to a sectional plane which runs perpendicular to the mounting side of the luminaire in the longitudinal direction of the luminaire. In the case of a ceiling light, this corresponds to the vertical plane.

Gemäß einer bevorzugten Ausführungsform ist das Gehäusebasisteil im wesentlich vollständig aus einem lichtdurchlässigen Material gebildet. Beispielsweise kann das Gehäusebasisteil vollständig aus Glas oder einem Kunststoffmaterial gebildet sein, abgesehen von elektrischen Komponenten oder Einbauten, die auf der Innenseite des Gehäusebasisteils angeordnet sind. Ein solches Gehäuse läßt sich kostengünstig herstellen und weist darüber hinaus den Vorteil auf, daß das Gehäuse einen einheitlichen Ausdehnungskoeffizienten aufweist, so daß bei Erwärmung des Gehäuses durch den Betrieb der Lampen keine Spannungen im Material auftreten.According to a preferred embodiment, the housing base part is substantially completely formed of a light-transmitting material. For example, the housing base may be formed entirely of glass or a plastic material, except for electrical components or internals disposed on the inside of the housing base. Such a housing can be produced inexpensively and also has the advantage on that the housing has a uniform coefficient of expansion, so that when heating the housing by the operation of the lamps no stresses in the material occur.

Insbesondere können auch die lichtbrechenden Strukturen einteilig mit dem Gehäusebasisteil oder wenigstens mit dem lichtdurchlässigen Teilbereich des Gehäusebasisteils ausgebildet sein.In particular, the refractive structures may be formed integrally with the housing base part or at least with the translucent portion of the housing base part.

Gemäß einer bevorzugten Ausführungsform der Leuchte ist im Innenraum des Gehäuses ein Reflektor zwischen dem Gehäusebasisteil und dem Leuchtmittel angeordnet. Der Reflektor sorgt primär für eine Lichtlenkung in Richtung zur Hauptabstrahlrichtung der Leuchte für die direkte Beleuchtung durch die transparente Gehäuseabdeckung.According to a preferred embodiment of the luminaire, a reflector is arranged in the interior of the housing between the housing base part and the lighting means. The reflector primarily provides a light direction in the direction of the main emission of the lamp for direct illumination through the transparent housing cover.

Gemäß einer bevorzugten Ausführungsform ist der Reflektor so eingerichtet, daß Licht von dem Leuchtmittel auf gradlinigem Weg an dem Reflektor vorbei und durch eine Öffnung in dem Reflektor zu dem lichtdurchlässigen Teilbereich des Gehäusebasisteils gelangt. Dieser Lichtanteil sorgt für die gewünschte Indirektbeleuchtung. Alternativ oder zusätzlich kann der Reflektor ein oder mehrere Reflexionsflächen aufweisen, die so angeordnet sind, daß sie Licht von dem Leuchtmittel zu dem lichtdurchlässigen Teil des Gehäusebasisteils reflektieren. Mit anderen Worten ausgedrückt kann der Indirektanteil der Lichtstrahlung entweder direkt von dem Leuchtmittel und/oder über Reflexion an dem Reflektor gebildet werden. In jedem Fall tritt die Indirektstrahlung durch den lichtdurchlässigen Teilbereich des Gehäusebasisteils hindurch, an dem die lichtbrechenden Strukturen zur Erzielung der gewünschten Lichtverteilung angeordnet sind.According to a preferred embodiment, the reflector is set up so that light passes from the luminous means on a straight path past the reflector and through an opening in the reflector to the translucent portion of the housing base part. This proportion of light provides the desired indirect lighting. Alternatively or additionally, the reflector may include one or more reflective surfaces arranged to reflect light from the bulb to the translucent portion of the barrel base. In other words, the indirect component of the light radiation can be formed either directly by the illuminant and / or by reflection at the reflector. In any case, the indirect radiation passes through the translucent portion of the housing base portion on which the refractive structures are arranged to achieve the desired light distribution.

Gemäß einer bevorzugten Weiterbildung der vorhergehend beschriebenen Ausführungsformen trifft die Lichtstrahlung, welche über den Reflektor auf den lichtdurchlässigen Teilbereich des Gehäusebasisteils auftrifft in einem flacheren Winkel bezogen auf die Anbauseite des Gehäusebasisteils auf den lichtdurchlässigen Teilbereich auf als diejenige Lichtstrahlung, welche auf den gleichen Ort des lichtdurchlässigen Teilbereichs ohne Reflexion an dem Reflektor auftrifft. Die Winkel sind dabei in einer Querschnittsfläche senkrecht zur Längserstreckung der Leuchte bestimmt. Diese Ausführungsform hat den Vorteil, daß der Reflektor zusätzlich zu den lichtbrechenden Strukturen an dem Gehäusebasisteil für eine Breitstrahlung des Indirektanteils der Lichtstrahlung der Leuchte sorgt. Der Anteil der Indirektanstrahlung, die über den Reflektor erfolgt, wird zusätzlich zu der Ablenkung durch die lichtbrechenden Strukturen auch durch Reflexion an dem Reflektor in Richtung von der Anbauseite der Leuchte weg umgelenkt.According to a preferred embodiment of the embodiments described above, the light radiation which impinges on the reflector on the translucent portion of the housing base part hits in a shallower angle relative to the mounting side of the housing base part on the translucent portion than that light radiation which impinges on the same location of the translucent portion without reflection on the reflector. The angles are determined in a cross-sectional area perpendicular to the longitudinal extent of the lamp. This embodiment has the advantage that, in addition to the refractive structures on the housing base part, the reflector ensures broad radiation of the indirect component of the light radiation of the luminaire. The proportion of indirect radiation which occurs via the reflector, in addition to the deflection by the refractive structures, is also deflected by reflection at the reflector in the direction away from the mounting side of the luminaire.

Gemäß einer Ausführungsform ist das Gehäuse der Leuchte vollständig geschlossen. Insbesondere kann es sich um eine Feuchtraumleuchte handeln, die gegen eindringende Feuchtigkeit, Strahlwasser oder Spritzwasser abgedichtet ist. Eine Ausführungsform der Leuchte kann beispielsweise den Schutzgrad IP 65 gemäß EN60598-1 in der Fassung aus dem Jahr 2004 realisieren.According to one embodiment, the housing of the lamp is completely closed. In particular, it may be a wet room light, which is sealed against penetrating moisture, jet water or spray water. An embodiment of the luminaire can realize, for example, the degree of protection IP 65 according to EN60598-1 in the version from the year 2004.

Gemäß einer bevorzugten Ausführungsform sind die lichtdurchlässigen Teilbereiche des Gehäusebasisteils oder das vollständige Gehäusebasisteil mit einem Farbfilter versehen, z.B. durch Einfärben des Materials des Gehäusebasisteils oder durch Aufbringen einer entsprechend eingefärbten Beschichtung. Dadurch wird ein farbiger Indirektanteil des Lichts erzeugt. Durch die farbige Absetzung des Indirektanteils wird nicht nur ein ansprechender ästhetischer Eindruck geschaffen, sondern dieser Anteil kann auch die technische Funktion erfüllen, wie z.B. eine Signalwirkung. Ferner kann die Farbe des indirekten Lichtanteils auf die spektralen Reflexionseigenschaften der Wand- oder Deckenfarbe angepaßt werden, um für eine besonders effiziente Indirektbeleuchtung des Raumes zu sorgen.According to a preferred embodiment, the translucent portions of the housing base portion or the complete housing base portion are provided with a color filter, e.g. by coloring the material of the housing base part or by applying a correspondingly colored coating. As a result, a colored indirect portion of the light is generated. The colored deposition of the indirect component not only provides an appealing aesthetic impression, but this component can also fulfill the technical function, such as, e.g. a signal effect. Furthermore, the color of the indirect light component can be adapted to the spectral reflection properties of the wall or ceiling color to provide a particularly efficient indirect lighting of the room.

Eine bevorzugte Ausführungsform der erfindungsgemäßen Leuchte wird nachfolgend detailliert anhand der Figuren erläutert.

Figur 1
zeigt einen Querschnitt durch eine Leuchte nach dem Stand der Technik.
Figur 2
zeigt einen Querschnitt durch eine Leuchte gemäß einer Ausführungsform der vorliegenden Erfindung.
Figur 3
zeigt einen Querschnitt durch eine Leuchte gemäß einer zweiten Ausführungsform der vorliegenden Erfindung.
Figuren 4 und 5
zeigen die Lichtstärkeverteilung einer Leuchte nach dem Stand der Technik bzw. gemäß einer Ausführungsform der Erfindung in einer Polardarstellung im Querschnitt senkrecht zur Längserstreckung der Leuchte.
Figur 6
zeigt einen Querschnitt durch den lichtdurchlässigen Teil eines Gehäusebasisteils gemäß dem Stand der Technik.
Figuren 7 und 8
zeigen Querschnitte durch den lichtdurchlässigen Teilbereich eines Gehäusebasisabschnitts von Leuchten gemäß zwei verschiedener Ausführungsformen der vorliegenden Erfindung.
A preferred embodiment of the luminaire according to the invention is explained in detail below with reference to the figures.
FIG. 1
shows a cross section through a lamp according to the prior art.
FIG. 2
shows a cross section through a lamp according to an embodiment of the present invention.
FIG. 3
shows a cross section through a lamp according to a second embodiment of the present invention.
FIGS. 4 and 5
show the light intensity distribution of a lamp according to the prior art or according to an embodiment of the invention in a polar representation in cross-section perpendicular to the longitudinal extent of the lamp.
FIG. 6
shows a cross section through the translucent part of a housing base part according to the prior art.
FIGS. 7 and 8
show cross-sections through the translucent portion of a housing base portion of lamps according to two different embodiments of the present invention.

Bezugnehmend auf die Figur 2 ist ein Querschnitt einer Ausführungsform einer Leuchte gezeigt. Ein wannenförmiges Gehäusebasisteil 2 definiert im Querschnitt eine nach unten offene Form. Im oberen Bereich ist das Gehäusebasisteil etwa U-förmig ausgebildet. In diesem Bereich können elektrische Bauteile (nicht dargestellt) angeordnet sein. Ein ebener Abschnitt des Gehäusebasisteils 2, welcher einem Leuchtmittel 1 gegenüberliegt, bildet eine Anbauseite 3 der Leuchte. An der Anbauseite 3 sind Vorsprünge 4 vorgesehen, an denen Befestigungsmittel zum Montieren der Leuchte, wie Schrauben, hindurchgeführt werden können. Alternativ kann die Leuchte an der Anbauseite 3 bzw. an den Vorsprüngen 4 auch an Pendelstangen oder einem Seilsystem von einer Decke abgehängt werden.Referring to the FIG. 2 a cross-section of an embodiment of a luminaire is shown. A trough-shaped housing base part 2 defines a downwardly open shape in cross section. In the upper area, the housing base part is approximately U-shaped. In this area, electrical components (not shown) may be arranged. A planar portion of the housing base part 2, which is opposite to a lighting means 1, forms a mounting side 3 of the lamp. On the mounting side 3 projections 4 are provided, on which fastening means for mounting the lamp, such as screws, can be passed. Alternatively, the light can be hung on the mounting side 3 or on the projections 4 on pendulum rods or a cable system from a ceiling.

Das Gehäusebasisteil 2 wird durch eine transparente Gehäuseabdeckung 5 nach unten abgeschlossen. Die transparente Gehäuseabdeckung 5 ist ebenfalls wannenförmig ausgebildet und schließt mit dem Gehäusebasisteil 2 einen vollständig geschlossenen Innenraum ab. Zwischen dem Gehäusebasisteil 2 und der transparenten Abdeckung 5 kann, wie in den Figuren dargestellt, eine Dichtung 6 vorgesehen sein, die für einen staub- oder feuchtigkeitsdichten Verschluß zwischen Gehäusebasisteil 2 und transparenter Gehäuseabdeckung 5 sorgt. Das Gehäusebasisteil 2 und die Gehäuseabdeckung 5 können beispielsweise mit Klammern an der Außenseite miteinander verbunden sein. Alternativ kann auch eine Rastverbindung vorgesehen sein oder zusätzlich auf wenigstens einer Längsseite ein Scharnier vorgesehen sein (in den Figuren nicht dargestellt).The housing base part 2 is closed by a transparent housing cover 5 down. The transparent housing cover 5 is likewise trough-shaped and terminates with the housing base part 2 a completely closed interior. Between the housing base part 2 and the transparent cover 5, as shown in the figures, a seal 6 may be provided, which ensures a dust-tight or moisture-tight closure between the housing base part 2 and the transparent housing cover 5. The housing base part 2 and the housing cover 5 may, for example, be connected to one another with clips on the outside. Alternatively, a latching connection may also be provided or, in addition, a hinge may be provided on at least one longitudinal side (not shown in the figures).

In dem durch das Gehäusebasisteil 2 und die transparente Gehäuseabdeckung 5 definierten Innenraum ist ein Leuchtmittel 1 angeordnet. Das Leuchtmittel 1 ist in der Figur 1 im Querschnitt dargestellt. Es handelt sich dabei um eine röhrenförmige Leuchtstofflampe, die im Innenraum der Leuchte an deren Längsenden gesockelt ist.In the interior defined by the housing base part 2 and the transparent housing cover 5, a light source 1 is arranged. The light source 1 is in the FIG. 1 shown in cross section. It is a tubular fluorescent lamp, which is socketed in the interior of the lamp at the longitudinal ends.

Das von dem Leuchtmittel 1 ausgehende Licht tritt zum überwiegenden Teil durch die transparente Gehäuseabdeckung 5 hindurch. Die transparente Gehäuseabdeckung 5 weist auf der Innenseite eine Riffelung auf, die für eine Streuung des durch die Gehäuseabdeckung hindurchtretenden Lichts sorgt. Der Anteil der Lichtstrahlung, welcher durch die transparente Gehäuseabdeckung 5 hindurchtritt, bildet einen großen Teil des Lichtstroms der Leuchte, der zur direkten Beleuchtung vorgesehen ist.The light emanating from the light source 1 predominantly passes through the transparent housing cover 5. The transparent housing cover 5 has a corrugation on the inside, which ensures a scattering of light passing through the housing cover. The proportion of the light radiation which passes through the transparent housing cover 5 forms a large part of the luminous flux of the luminaire, which is intended for direct illumination.

Neben dem Lichtstrom des Leuchtmittels 1, welches durch die Gehäuseabdeckung 5 hindurchtritt, tritt ein Teil des Lichtstroms, der in den Figuren als Lichtstrahlenbündel 8 dargestellt ist, auch durch das Gehäusebasisteil hindurch. Das Gehäusebasisteil ist in der gezeigten Ausführungsform vollständig aus einem transparenten Kunststoff gebildet, so daß der Lichtdurchtritt ermöglicht wird. Im Bereich neben dem U-förmigen Abschnitt des Gehäusebasisteils und dem Verbindungsrand zur Gehäuseabdeckung 5 sind auf der Innenseite des Gehäusebasisteils 2 lichtbrechende Strukturen 10 angeordnet. Die Wirkungsweise der lichtbrechenden Strukturen 10 wird anhand der Figuren 6 bis 8, welche den entsprechenden Ausschnitt des Gehäusebasisteils 2 darstellen, erläutert. Ohne die lichtbrechenden Strukturen, wie in der Figur 6 dargestellt, tritt das Licht im wesentlichen gradlinig durch die Gehäuseabdeckung hindurch. Allenfalls für Lichtstrahlung mit einem von 90° abweichenden Einfallswinkel wäre eine geringe Ablenkung zu beobachten. Demgegenüber weist die erfindungsgemäße Leuchte auf der Innenseite lichtbrechende Strukturen 10 auf. Dabei handelt es sich um Prismenelemente, die sich in Längsrichtung der Leuchte parallel zum Leuchtmittel auf der Innenseite des Gehäusebasisteils 2 erstrecken. Die Prismenelemente weisen zwei zum Innenraum der Leuchte weisende Schenkel 11 und 12 auf. Der Schenkel 11 weist in Richtung zu der Anbauseite 3 der Leuchte, während der Schenkel 12 auf der der Anbauseite abgewandten Seite des Prismas 10 angeordnet ist. Durch die Neigung des Schenkels 11 wird, wie in der Figur 7 dargestellt, wird ein Lichtstrahl, der etwa senkrecht auf das Gehäusebasisteil auftrifft, aus der Ursprungsrichtung (in der Figur gestrichelt dargestellt) gebrochen. Dadurch wird der Austrittswinkel des Lichtstrahls im Vergleich zu einer glatten Fläche, wie in Figur 6 dargestellt, in eine Richtung von der Anbauseite 3 der Leuchte weg umgelenkt. Dies sorgt für den erfindungsgemäßen Effekt, wonach eine Breitstrahlung des Indirektanteils der Lichtstrahlung der Leuchte erzeugt wird.In addition to the luminous flux of the luminous means 1, which passes through the housing cover 5, a part of the luminous flux, which is shown in the figures as a light beam 8, also passes through the housing base part. The housing base part is completely formed in the embodiment shown from a transparent plastic, so that the passage of light is made possible. In the area next to the U-shaped portion of the housing base part and the connecting edge to the housing cover 5 are on the inside of the housing base part 2 refractive structures 10 arranged. The mode of action of the refractive structures 10 will be described with reference to FIGS FIGS. 6 to 8 , which illustrate the corresponding section of the housing base part 2, explained. Without the refractive structures, as in the FIG. 6 shown, the light passes through the housing cover substantially in a straight line. At best, for light radiation with a different angle of incidence of 90 °, a slight deflection would be observed. In contrast, the luminaire according to the invention has light-refracting structures 10 on the inside. These are prism elements which extend in the longitudinal direction of the luminaire parallel to the luminous means on the inside of the housing base part 2. The prism elements have two to the interior of the luminaire facing legs 11 and 12. The leg 11 points in the direction of the mounting side 3 of the lamp, while the leg 12 is arranged on the side facing away from the mounting side of the prism 10. By the inclination of the leg 11 is, as in the FIG. 7 is shown, a light beam which is approximately perpendicular to the housing base part, from the original direction (shown in phantom in the figure) is broken. As a result, the exit angle of the light beam compared to a smooth surface, as in FIG. 6 shown deflected in a direction away from the mounting side 3 of the lamp. This ensures the effect according to the invention, according to which a broad radiation of the indirect component of the light radiation of the luminaire is generated.

Der Schenkel 12 ist gegenüber dem Schenkel 11 etwas kürzer ausgebildet. Ferner erstreckt sich der Schenkel 12 etwa parallel zu einer Radiallinie, die von dem Leuchtmittel ausgeht und auf die Gehäuseabdeckung auftrifft. Demzufolge tritt durch den Schenkel 12 im Vergleich zum Schenkel 11 weniger Licht hindurch. Allgemein nimmt die Dicke des Prismenelements von der der Leuchtenanbauseite 3 abgewandten Seite, d.h. von dem Schenkel 12, zu der der Leuchtenanbauseite 3 zugewandten Seite, d.h. entlang des Schenkels 11, ab. Durch diese Formgebung und die Anordnung gegenüber der Lichtquelle wird der gewünschte Ablenkungseffekt erzielt.The leg 12 is formed slightly shorter than the leg 11. Furthermore, the leg 12 extends approximately parallel to a radial line, which emanates from the lamp and impinges on the housing cover. As a result, less light passes through the leg 12 as compared to the leg 11. In general, the thickness of the prismatic element decreases from the side facing away from the luminaire mounting side 3, ie from the leg 12, to the side facing the luminaire mounting side 3, ie along the leg 11. This shape and the arrangement relative to the light source, the desired deflection effect is achieved.

Figur 8 zeigt eine alternative Ausführungsform der lichtbrechenden Struktur 10. Bei dieser Ausführungsform ist der Schenkel 11' etwa gleich lang zu dem Schenkel 12'. Durch die Neigung des Schenkels 11' zum einfallenden Lichtstrahl wird jedoch der gleiche Ablenkungseffekt, wie vorhergehend beschrieben, erzielt. Durch den Schenkel 12' kann auch Licht hindurchtreten. Dieses trägt zu einer Lichtverteilung nahe der Leuchte bei. FIG. 8 shows an alternative embodiment of the refractive structure 10. In this embodiment, the leg 11 'is approximately equal to the leg 12'. By the inclination of the leg 11 'to the incident light beam, however, the same deflection effect, as previously described, achieved. Through the leg 12 'can also pass light. This contributes to a light distribution near the luminaire.

Die Gesamtlichtverteilung, welche durch eine Ausführungsform der erfindungsgemäßen Leuchte hervorgebracht wird, ist in Figur 5 in einem Polardiagramm dargestellt. Im Vergleich dazu zeigt Figur 4 ein Polardiagramm der Lichtstärkeverteilung einer Leuchte ohne lichtbrechende Strukturen 10. Wie in den Figuren zu erkennen ist, zeigt die Lichtverteilung zwei ausgeprägte Maxima 13 in Richtung der Hauptabstrahlrichtung der Leuchte, die den Direktanteil der Lichtstärke bilden. Dieses Licht wird im wesentlichen durch den Anteil des Lichts erzeugt, das durch die transparente Gehäuseabdeckung 5 durchtritt. Auf der entgegengesetzten Seite der Hauptmaxima 13, d.h. auf der zur Anbauseite der Leuchte gewandten Hälfte, ist die Lichtverteilung des Indirektanteils 14 zu sehen. Durch den Vergleich der Figuren 4 und 5 zeigt sich, daß der indirekte Anteil 14 einer Leuchte gemäß der vorliegenden Erfindung (vgl. Figur 5) breiter und flacher verläuft als bei einer Leuchte nach dem Stand der Technik (vgl. Figur 4). Dieser Effekt wird durch die lichtbrechende Struktur 10 an der Gehäusebasisseite 2 hervorgerufen und ermöglicht eine großflächige und gleichmäßige Ausleuchtung der Zimmerdecke, an der die Leuchte montiert ist.The total light distribution which is produced by an embodiment of the luminaire according to the invention is in FIG. 5 shown in a polar diagram. In comparison shows FIG. 4 a polar diagram of the luminous intensity distribution of a luminaire without refractive structures 10. As can be seen in the figures, the light distribution shows two pronounced maxima 13 in the direction of the main emission of the luminaire, which form the direct component of the light intensity. This light is essentially generated by the proportion of the light passing through the transparent housing cover 5. On the opposite side of the main maxima 13, ie on the side facing the mounting side of the lamp, the light distribution of the indirect component 14 can be seen. By comparing the FIGS. 4 and 5 shows that the indirect portion 14 of a lamp according to the present invention (see. FIG. 5 ) wider and flatter than in a lamp according to the prior art (see. FIG. 4 ). This effect is caused by the refractive structure 10 on the housing base side 2 and allows a large-scale and uniform illumination of the ceiling to which the lamp is mounted.

Figur 3 zeigt einen Querschnitt durch eine alternative Ausführungsform der erfindungsgemäßen Leuchte. Dabei handelt es sich um eine zweilampige Leuchte. Die entsprechenden Bauelemente sind mit den gleichen Bezugszeichen wie in Figur 2 bezeichnet. FIG. 3 shows a cross section through an alternative embodiment of the lamp according to the invention. This is a two-lamp lamp. The corresponding components are denoted by the same reference numerals as in FIG FIG. 2 designated.

Zwischen dem einen oder den mehreren Leuchtmitteln 1 der Leuchte und dem Gehäusebasisteil 5 ist eine Reflektor 15 angeordnet. Ein wesentlicher Anteil der Lichtstrahlung von dem oder den Leuchtmittel(n) wird durch den Reflektor 15 in Richtung zu der transparenten Gehäuseabdeckung 5 gelenkt.Between the one or more lamps 1 of the lamp and the housing base part 5, a reflector 15 is arranged. A significant proportion of the light radiation from the light source (s) is directed by the reflector 15 in the direction of the transparent housing cover 5.

Gemäß der Ausführungsform nach der Figur 3 sind jedoch seitlich abgewinkelte Bereiche 16 an dem Reflektor 15 vorgesehen, die auch Licht zu den Teilbereichen des Gehäusebasisteils 2 reflektieren, die mit den lichtbrechenden Strukturen 10 versehen sind. Der Effekt der Reflektorabschnitte 16 des Reflektors 15 wird anhand des Lichtstrahlenbündels 8' im Zusammenhang mit Figur 3 erläutert. Die Lichtstrahlung 8', die von einem Leuchtmittel 1 ausgeht, und an dem Reflektorteilbereich 16 reflektiert wird, trifft unter einem flacheren Winkel auf die lichtbrechende Struktur 10 auf im Vergleich zu derjenigen Lichtstrahlung, die an den gleichen Ort auftrifft, jedoch ohne Reflexion an dem Reflektorabschnitt 16. Durch die Reflexion im Reflektorabschnitt 16 wird das Lichtstrahlenbündel 8' bereits in Richtung von der Leuchtenanbauseite 3 weg durch Reflexion am Reflektorabschnitt 16 abgelenkt. Dieser Effekt wird durch die nachfolgende Lichtbrechung an der lichtbrechenden Struktur 10 abermals verstärkt. Dadurch wird im Ergebnis durch das Lichtstrahlenbündel 8' eine noch stärkere Breiteverteilung des Anteils der Lichtverteilungskurve, die den Indirektanteil 14 bildet, erzeugt.According to the embodiment of the FIG. 3 However, laterally angled portions 16 are provided on the reflector 15, which also reflect light to the portions of the housing base part 2, which are provided with the refractive structures 10. The effect of the reflector sections 16 of the reflector 15 is based on the light beam 8 'in connection with FIG. 3 explained. The light radiation 8 ', which emanates from a luminous means 1 and is reflected at the reflector portion 16, impinges on the refractive structure 10 at a shallower angle compared to the light radiation which impinges on the same location but without reflection at the reflector portion 16. Due to the reflection in the reflector section 16, the light beam 8 'is already deflected in the direction away from the luminaire mounting side 3 by reflection at the reflector section 16. This effect is reinforced by the subsequent refraction of the refractive structure 10 again. As a result, an even greater width distribution of the portion of the light distribution curve forming the indirect component 14 is produced by the light beam 8 '.

In den dargestellten Ausführungsformen befinden sich die lichtdurchlässigen Teilbereiche des Gehäusebasisteils 2, die mit dem lichtbrechenden Strukturen 10 versehen sind, befinden sich bezogen auf einen Querschnitt senkrecht zur Längserstreckung der Leuchte oberhalb des einen oder der mehreren Leuchtmittel 1 und unterhalb der Anbaufläche 3. Allgemein ist ausgehend von dem Mittelpunkt des Leuchtmittels 1 oder dem Mittelpunkt zwischen mehreren Leuchtmitteln ein Winkelbereich von 5° bis 85°, bevorzugt von 20° bis 80°, oberhalb einer ebenen Schnittfläche, parallel zur Anbauseite 3 und durch das Leuchtmittel 1 für die Anordnung der lichtbrechenden Strukturen bevorzugt.In the illustrated embodiments, the translucent portions of the housing base portion 2, which are provided with the refractive structures 10, are located relative to a cross section perpendicular to the longitudinal extent of the lamp above the one or more lamps 1 and below the mounting surface 3. Generally starting from the center of the luminous means 1 or the center between a plurality of bulbs, an angular range of 5 ° to 85 °, preferably 20 ° to 80 °, above a flat sectional surface, parallel to the mounting side 3 and by the light source 1 for the arrangement of refractive structures preferred ,

Weitere Ausführungsformen der erfindungsgemäßen Leuchte sind möglich. Beispielsweise können die lichtbrechenden Strukturen 10 auch mit einer anderen Geometrie ausgebildet sein, um den gewünschten Effekt herbeizurufen. Ferner kann die lichtbrechende Struktur auf der Außenseite der Leuchte vorgesehen sein.Further embodiments of the luminaire according to the invention are possible. For example, the refractive structures 10 may also be formed with a different geometry in order to bring about the desired effect. Furthermore, the refractive structure may be provided on the outside of the luminaire.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

11
LeuchtmittelLamp
22
GehäusebasisteilHousing base part
33
Anbauseitemounting side
44
Vorsprunghead Start
55
Transparente GehäuseabdeckungTransparent housing cover
66
Dichtungpoetry
8, 8'8, 8 '
Lichtstrahlenbündel des IndirektanteilsLight beams of the indirect component
1010
Lichtbrechende StrukturRefractive structure
11, 11'11, 11 '
Schenkel des PrismaThighs of the prism
12, 12'12, 12 '
Schenkel des PrismaThighs of the prism
1313
Direktanteil der LichtstärkeverteilungDirect component of the light intensity distribution
1414
Indirektanteil der LichtstärkeverteilungIndirect portion of the light intensity distribution
1515
Reflektorreflector
1616
ReflektorteilflächenReflector faces

Claims (13)

  1. Lighting fixture with a housing, said housing comprising a housing base (2) and a translucent housing cover (5) which enclose an interior of the housing, wherein at least one illuminant (1) is arranged in the interior of the housing, wherein the housing base (2) has at least one subarea formed from a translucent material, with light of the illuminant passing through said subarea in order to produce an indirect lighting, wherein refractive structures (10) are arranged at the translucent subarea of the housing base (2), characterised in that the housing base (2) has, on the side facing away from the illuminant (1), a mounted side (3) for fixing the lighting fixture and the refractive structures (10) divert the light passing through the subarea in a direction away from the mounted side (3).
  2. Lighting fixture according to claim 1, wherein the refractive structures (10), in a cross-section vertical to a longitudinal extension of the illuminant (1), have a constant cross-section at least over a part of the longitudinal extension.
  3. Lighting fixture according to claim 2, wherein the thickness of the refractive structures (10) always reduces in the said cross-section from the side facing away from the mounted side (3) to the side facing the mounted side (3).
  4. Lighting fixture according to one of the preceding claims, wherein the refractive structures (10) are formed by prism elements.
  5. Lighting fixture according to claim 4, wherein the prism elements have two asymmetric legs (11, 12).
  6. Lighting fixture according to one of the preceding claims, wherein the refractive structures (10) are arranged on the side of the housing base which faces the interior.
  7. Lighting fixture according to one of the preceding claims, wherein the housing base (2) has at least two translucent subareas with refractive structures (10) which are arranged in relation to both sides of the mounted side (3) of the housing base (2).
  8. Lighting fixture according to one of the preceding claims, wherein the housing base (2), essentially, is formed entirely from a translucent material.
  9. Lighting fixture according to one of the preceding claims, wherein, in the interior of the housing, a reflector (15) is arranged between the housing base (2) and the illuminant (1).
  10. Lighting fixture according to claim 9, wherein light from the illuminant (1) passes, in a straight line, past the reflector (15) or through an opening in the reflector to the translucent subarea of the housing base (2) on which the light-directing structures are provided.
  11. Lighting fixture according to claim 9 or 10, wherein the reflector (15) has one or several reflection surfaces (16) arranged such that they reflect light from the illuminant (1) to the translucent subarea of the housing base (2).
  12. Lighting fixture according to claim 11, wherein light radiation strikes, via the reflector (15), the translucent subarea of the housing base (2), striking at a shallower angle related to the mounted side (3) of the housing base (2) onto the translucent subarea than light radiation which strikes the same spot of the translucent subarea without reflection at the reflector (15), wherein the angles are determined in a cross-sectional area vertical to a longitudinal extension of the lighting fixture.
  13. Lighting fixture according to one of the preceding claims, wherein the housing is fully closed, in particular sealed against moisture, spray water or jets of water.
EP08019624A 2007-11-09 2008-11-10 Bath light with indirect share of light Not-in-force EP2058587B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007053468 2007-11-09

Publications (2)

Publication Number Publication Date
EP2058587A1 EP2058587A1 (en) 2009-05-13
EP2058587B1 true EP2058587B1 (en) 2011-12-28

Family

ID=40336618

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08019624A Not-in-force EP2058587B1 (en) 2007-11-09 2008-11-10 Bath light with indirect share of light

Country Status (2)

Country Link
EP (1) EP2058587B1 (en)
AT (1) ATE539297T1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015115220A (en) * 2013-12-12 2015-06-22 東芝ライテック株式会社 Luminaire
DE102014119616A1 (en) 2014-12-23 2016-06-23 Siteco Beleuchtungstechnik Gmbh LED lens body for generating a direct and indirect light component

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7910659U1 (en) * 1979-04-11 1979-07-12 Siemens Ag, 1000 Berlin Und 8000 Muenchen SUSPENSION LAMP WITH PARTIAL LIGHTING UPWARDS
DE29502183U1 (en) 1995-02-10 1996-05-02 Zumtobel Licht Luminaire, especially damp room luminaire, with a two-part closed housing
DE20314606U1 (en) * 2003-09-18 2003-11-27 Unger Patent- und Lizenzgesellschaft mbH Light, especially for ceiling, has prisms in lateral surfaces of casing for shining light in upwards direction
EP1847766A1 (en) * 2006-04-18 2007-10-24 Hartmut S. Engel Indoor lighting device

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ATE539297T1 (en) 2012-01-15
EP2058587A1 (en) 2009-05-13

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