EP2644976A1 - Lamp with peripheral light emission - Google Patents

Lamp with peripheral light emission Download PDF

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Publication number
EP2644976A1
EP2644976A1 EP13158218.1A EP13158218A EP2644976A1 EP 2644976 A1 EP2644976 A1 EP 2644976A1 EP 13158218 A EP13158218 A EP 13158218A EP 2644976 A1 EP2644976 A1 EP 2644976A1
Authority
EP
European Patent Office
Prior art keywords
light
primary
transparent cover
luminaire
cover
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.)
Granted
Application number
EP13158218.1A
Other languages
German (de)
French (fr)
Other versions
EP2644976B1 (en
Inventor
Christoph Lewers
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
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Publication date
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Publication of EP2644976A1 publication Critical patent/EP2644976A1/en
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Publication of EP2644976B1 publication Critical patent/EP2644976B1/en
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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
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/02—Globes; Bowls; Cover glasses characterised by the shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • F21S8/026—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • 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
    • F21V7/0091—Reflectors for light sources using total internal reflection
    • 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 a lamp, in particular a ceiling or wall lamp, which is specially adapted to lighten an area around the light exit surface of the lamp around.
  • a lamp of the type mentioned is for example from the document DE 2 121 0743 A known. This discloses a luminaire for suspended ceiling or ceiling installation with a ring mirror which intercepts a luminous flux of the lamp and deflects to the ceiling to illuminate this.
  • the above-mentioned lights according to the prior art have the disadvantage that an annular element is provided on the light exit surface of the lamp, which must be mounted separately to the other lighting components and within the light exit opening of the lamp the viewer as a separate component.
  • reflectors are perceived as dark elements in the light exit opening.
  • the object of the present invention is to provide a luminaire construction of the initially mentioned type which is structurally simple to implement and has a uniform appearance in the light exit opening for brightening an area around the luminaire, in particular a surrounding ceiling or wall area around the luminaire, provides.
  • the object is achieved by a luminaire according to claim 1 and a cover for a luminaire according to claim 11.
  • the invention provides a luminaire, in particular a ceiling or wall luminaire, with at least one luminous means, a luminaire housing and a transparent cover, the transparent cover for emitting light in a primary emission direction of the luminaire having a primary section which is arranged in the region of the light exit opening of the luminaire housing is, has.
  • the cover further includes a secondary portion disposed outside the region of the light exit opening of the lamp housing.
  • the cover has a first surface facing away from the luminous means and a second surface facing the luminous means, wherein the first surface in the secondary section has a reflection region which is curved away or angled away from the luminous means, the reflection region comprising light, which differs from the light source Illuminant impinges through the second surface on the reflection region, totally reflected and deflects away from the primary emission direction.
  • the luminaire can be designed for installation in or on a ceiling or wall, wherein the reflection region of light, which impinges from the luminous means through the second surface on the reflection area, totally reflects and at least partially deflects in the direction of the ceiling or wall.
  • the luminaire By deflecting the light incident on the reflection area from the primary radiation direction, the luminaire receives a light distribution curve with a smoother transition between primary, in the direction of the primary light emission direction, and secondary to be illuminated angle ranges.
  • a light distribution curve with a smoother transition between primary, in the direction of the primary light emission direction, and secondary to be illuminated angle ranges.
  • the primary light emission direction may be a main emission direction of the luminaire.
  • the primary light emission direction can also be formed by an axis of symmetry of the light distribution curve of the luminaire.
  • the primary light emission direction of the luminaire corresponds to a surface normal of the first surface of the transparent cover in the primary portion.
  • the total reflection takes place in a region that is not needed for the primary light emission. In this way, disturbing dark or too bright spots in the area of the light exit opening are prevented and thus greater differences in luminance are avoided.
  • the reflection region may be curved or angled away from the light source such that it is curved or angled in the direction of the primary light emission direction of the light.
  • a curved reflection area is preferred because it allows for total reflection over a larger area and allows a softer light distribution curve.
  • the reflection region can in particular be concavely curved.
  • the reflection region is formed by a curvature or angling of the first surface without forming therein a depression, a groove, a projection, or the like. This allows a simpler production of the cover and avoids disturbing areas on the first surface.
  • the primary portion and the secondary portion of the transparent cover may be made in one piece. This allows easy production and installation of the lamp.
  • the primary and secondary sections may be adjacent.
  • the transparent cover may in particular be made of a plastic, e.g. Polymethyl methacrylate (PMMA) be made.
  • PMMA Polymethyl methacrylate
  • the secondary portion of the transparent cover is curved or angled away from the bulb.
  • Light which is incident from the illuminant through the second surface onto the reflection region and is totally reflected there, can in particular enter the transparent cover from the illuminant through the second surface in the primary portion.
  • light incident from the illuminant through the second surface to the reflection region and totally reflected therefrom may be diffused by the illuminant through the second surface in a transition portion of the cover between the primary portion and the secondary portion enter.
  • the transparent cover further comprises on the second surface a Lichteinkoppel Quilt, in particular a prismatic structure, on which light, which impinges from the light source, coupled into the transparent cover and breaks, so that it at least partially meets the reflection region.
  • the light-coupling structure directs a larger proportion of the light emitted by the luminous means into the secondary section to the reflection region. The proportion of light emitted into the environment of the lamp is thereby increased.
  • the Lichteinkoppel Weg is arranged in the primary portion of the transparent cover. In this way, no further sections are required on the transparent cover.
  • the primary section which at the same time determines the light emission in the primary light emission direction, can be used for deflecting a light component in the direction of the reflection zone.
  • the light radiation after the total reflection leaves the cover by a coupling area of the secondary section which lies opposite the reflection area.
  • the decoupling surface is a partial surface of the second surface in the secondary section. This further simplifies the manufacturing because the first and second surfaces can be used over both portions of the cover to form the light distribution curve without the need for further devices. However, in some embodiments, these may also be provided to further refine the light distribution curve.
  • the transparent cover has a plurality of facets on the light outcoupling surface. These can be designed so that the light is reflected even more times before it leaves the transparent cover on the decoupling surface.
  • the facets can be flat or curved, in particular concave or convexly curved.
  • the facets make it possible to specify a desired exit direction and a desired light bundling or light expansion of the exiting light.
  • the facets are step-shaped. At least some of the steps may have an area that runs parallel to the primary light emission direction. Through these surfaces, the exiting light can be broken transversely to the primary light emission direction, so that it is deflected in a targeted manner in the direction of a circumference of the luminaire.
  • the transparent cover extends flat in the primary section. Compared to an embodiment in which the transparent cover is convexly curved, thereby a smaller overall height of the lamp is achieved. Furthermore, the cover for the viewer is less noticeable.
  • the luminaire housing further comprises one or more means for directing light, in particular one or more reflectors or reflector sections.
  • the means for directing the light can in particular be designed so that they redirect light from the luminous means into the primary light emission direction and / or in the direction of the light exit opening of the luminaire housing.
  • the transparent cover is continuous in the primary section.
  • the transparent cover in the primary portion has no through-holes. In this way, the entire area of the transparent cover in the primary section can be used to set a desired light distribution curve. Furthermore, in these embodiments, a better protection against falling parts, such as splinters of a fluorescent tube is achieved. In addition, a direct view of the viewer is prevented on the bulb. This is advantageous, in particular in the case of LEDs or OLEDs as lighting means, since they can have a high luminance.
  • the transparent cover extends additionally or alternatively throughout the secondary portion. By avoiding through-holes in the secondary portion, undesired reflection or scattering of the light passing through the secondary portion is avoided.
  • the primary portion of the transparent cover on the first and / or on the second surface is at least partially provided with a refractive structure, in particular with a prism structure.
  • the prism structure may be integrated directly in the first and second surfaces of the cover. Alternatively or additionally, it may be provided as a foil or as a further plate on the surface of the cover.
  • the prism structure can face outward from the first or second surface of the cover, ie to the light exit surface or to the light source.
  • the prisms may point in the direction of the at least one luminous means or away from it.
  • it can be provided to form the refractive structure in regions on the first or second surface of the cover.
  • the secondary section surrounds the primary section at least partially, preferably completely.
  • light entering the transparent cover in different areas of the primary portion may be directed to the reflection area.
  • a radial light emission into several or even all lateral surrounding areas of the luminaire is made possible.
  • the secondary portion at least partially forms an edge of the transparent cover. In this way, after the total reflection, the light can be emitted directly to the environment without having to pass through further sections of the transparent cover. As a result, an additional scattering or otherwise unwanted influence of the light is avoided.
  • the transparent cover may have means for attachment to the luminaire housing, in particular screw holes, latching hooks, holes or recesses.
  • the means for attachment may be provided in particular in a transition section between the primary and the secondary section.
  • the invention provides a transparent cover for a luminaire according to any one of the preceding claims, wherein the transparent cover for light emission in a primary emission direction has a primary portion and further comprises a secondary portion and a first surface and a second surface opposite the first surface Surface having the first surface in the secondary Portion has a reflection portion which is concavely curved or angled relative to the first surface in the primary portion and dimensioned to totally reflect light entering the primary portion on the second surface in the transparent cover and incident on the reflection area, and to deflect away from the primary light emission direction, in particular to deflect in the direction of a circumference of the cover.
  • the cover on the second surface in the primary section can have a light coupling-in structure, in particular a prism structure.
  • the light-coupling structure may preferably be provided in an environment of a junction between the primary and secondary portions.
  • a luminaire of the present invention is designed in particular as a ceiling recessed or ceiling surface-mounted luminaire or as a wall-mounted or wall-mounted luminaire.
  • the luminaire comprises one or more light sources 2, in particular one or more fluorescent tubes or an arrangement of LEDs or OLEDs.
  • the luminous means 2 is arranged in a luminaire housing 3.
  • Reflectors 5 are also arranged in the luminaire housing 3, which deflect light emitted by the luminous means 2 in the direction of a light exit opening of the luminaire housing 3.
  • the transparent cover 4 comprises a centrally located primary section 41, which extends through the light exit opening of the light housing 3 and completely covers it. Further, the transparent cover 4 has secondary portions 42 which are outside the light exit opening of the lamp housing 3. The secondary sections 42 are formed as an edge of the transparent cover 4.
  • the in the FIG. 1 The luminaire shown has a primary light emission which extends around a primary light emission direction 71.
  • the primary light emission direction 71 extends vertically downwards, so that in this way the floor is illuminated below the lamp.
  • the primary light emission passes through the primary portion 41 of the transparent cover 4 and can be selectively influenced by the latter in order to set a desired light distribution curve of the primary light emission.
  • the primary portion 41 may have a prism structure 413 as shown in FIG FIG. 2 is shown.
  • the lamp also has a secondary light emission, which is aligned in the direction 72, 72 'of a circumference of the luminaire.
  • the secondary light emission extends in the lateral direction and transversely to the primary light emission direction 71.
  • the secondary light emission leaves the light in the secondary sections 42 as described below with reference to FIG FIG. 2 explained.
  • FIG. 2 shows a section of a cross section through a lamp. Shown is a portion of the lamp housing 3 and a reflector portion 5. In addition, shows FIG. 2 a secondary portion 42 and a portion of the primary portion 41 of the transparent cover 4. A light portion 6, which comes from the bulb, enters the transparent cover on the first surface 412 facing the bulb.
  • a prism structure 414 is provided in the primary portion 41 on the first surface 412 facing the light source.
  • the prism structure 414 serves for the improved coupling of the light 6 coming from the illuminant into the transparent cover 4, whereby a reflection of the light 6 at this point is largely avoided.
  • the prism structure 414 breaks the incident light 6 and directs it at least partially toward a reflection area of the cover 4 so as to be incident on the reflection area under an angle satisfying the condition of total reflection, as described in more detail below.
  • Light 6 which strikes the prism structure 414, is at least partially refracted there and coupled into the transparent cover 4. It then hits the the In this case, the first surface 421 in the secondary section 42 is in a reflection region away from the luminous means, ie concavely curved. The light 6 is totally reflected from the reflec- tion area and strikes the second surface 422 of the transparent cover 4 in the secondary portion 42.
  • facets 424 are provided in the form of steps. The light 6 leaves the transparent cover 4 through the facets 424 and extends in the radial direction in the direction of a circumference of the luminaire, as in FIG FIG. 1 represented by the reference numeral 72.
  • the facets 424 allow the light distribution curve of the secondary light output to be adjusted as desired.
  • the transparent cover 4 furthermore has a prism structure 413 in the primary section 41 on the first surface 411 facing away from the luminous means 2. This allows adjustment of the light distribution curve of the primary light emission.
  • the transparent cover 4 has a projection 43 on the second surface facing the luminous means 2.
  • the projection 43 is located at the transition between the primary portion 41 and the secondary portion 42.
  • the projection 43 is in the mounted state on a side wall of the lamp housing 3 at. As a result, the interior of the lamp housing is closed to the outside, so that no dust or similar. can penetrate. Further, the projection 43 allows aligning the cover 4 relative to the lamp housing 3 during assembly.
  • the projection means for fixing the cover 4 may be provided on the lamp housing 3 such as one or more holes, Vorsprüunge, recesses and / or hooks (in Fig. 2 Not shown).
  • the reflection region in the secondary portion may be angled away from the first surface in the primary portion.

Abstract

The lamp has a lighting unit (2), lamp housing (3) and a transparent cover (4), where the transparent cover has a primary portion (41) for emitting light in a primary radiation (71) of the lamp. The primary portion is arranged in a region of a light exit opening of the lamp housing. A secondary portion (42) of the cover is arranged outside the region of the light exit opening. A surface of the cover is arranged facing away from the lighting unit, while another surface is arranged facing the lighting unit. The former surface in the secondary portion has a curved light reflection region.

Description

Die Erfindung betrifft eine Leuchte, insbesondere eine Decken- oder Wandleuchte, welche speziell dafür eingerichtet ist, einen Bereich um die Lichtaustrittsfläche der Leuchte herum aufzuhellen.The invention relates to a lamp, in particular a ceiling or wall lamp, which is specially adapted to lighten an area around the light exit surface of the lamp around.

Eine Leuchte der eingangs genannten Art ist z.B. aus der Druckschrift DE 2 121 0743 A bekannt. Diese offenbart eine Leuchte zur Unterdeckenmontage oder zum Deckeneinbau mit einem Ringspiegel, welcher einen Lichtstromanteil der Lampe abfängt und zur Raumdecke umlenkt, um diesen anzustrahlen.A lamp of the type mentioned is for example from the document DE 2 121 0743 A known. This discloses a luminaire for suspended ceiling or ceiling installation with a ring mirror which intercepts a luminous flux of the lamp and deflects to the ceiling to illuminate this.

Ferner sind aus der DE 43 12 889 B4 , DE 37 37 324 C2 und DE 36 33 976 A1 Deckeneinbauleuchten bekannt, welche einen ringförmigen Lichtleitkörper oder Lichtstreukörper aufweisen, der ähnlich dem vorhergehend genannten Ringspiegel die Aufgabe hat, Licht in Richtung zum Umfangsbereich der Deckenleuchte umzulenken.Furthermore, from the DE 43 12 889 B4 . DE 37 37 324 C2 and DE 36 33 976 A1 Ceiling recessed lights are known, which have an annular Lichtleitkörper or light scattering body, which has the task similar to the above-mentioned ring mirror to redirect light toward the peripheral region of the ceiling light.

Die eingangs genannten Leuchten nach dem Stand der Technik besitzen jedoch den Nachteil, dass an der Lichtaustrittsfläche der Leuchte ein ringförmiges Element vorgesehen ist, welches separat zu den sonstigen Leuchtenbauteilen montiert werden muss und innerhalb der Lichtaustrittsöffnung der Leuchte dem Betrachter als separates Bauteil auffällt. Insbesondere werden Reflektoren als dunkle Elemente in der Lichtaustrittsöffnung wahrgenommen.However, the above-mentioned lights according to the prior art have the disadvantage that an annular element is provided on the light exit surface of the lamp, which must be mounted separately to the other lighting components and within the light exit opening of the lamp the viewer as a separate component. In particular, reflectors are perceived as dark elements in the light exit opening.

Aufgabe der vorliegenden Erfindung ist es, eine Leuchtenkonstruktion der eingangs genannten Art bereitzustellen, welche konstruktiv einfach zu verwirklichen ist und mit einem in der Lichtaustrittsöffnung einheitlichen Erscheinungsbild für eine Aufhellung eines Bereichs um die Leuchte herum, insbesondere eines umliegenden Decken- oder Wandbereichs um die Leuchte, sorgt.The object of the present invention is to provide a luminaire construction of the initially mentioned type which is structurally simple to implement and has a uniform appearance in the light exit opening for brightening an area around the luminaire, in particular a surrounding ceiling or wall area around the luminaire, provides.

Die Aufgabe wird durch eine Leuchte gemäß Anspruch 1 sowie eine Abdeckung für eine Leuchte gemäß Anspruch 11 gelöst.The object is achieved by a luminaire according to claim 1 and a cover for a luminaire according to claim 11.

Die Erfindung stellt eine Leuchte, insbesondere eine Decken- oder Wandleuchte, mit zumindest einem Leuchtmittel, einem Leuchtengehäuse und einer transparenten Abdeckung bereit, wobei die transparente Abdeckung zur Lichtabstrahlung in eine primäre Abstrahlrichtung der Leuchte einen primären Abschnitt, welcher im Bereich der Lichtaustrittsöffnung des Leuchtengehäuses angeordnet ist, aufweist. Die Abdeckung weist ferner einen sekundären Abschnitt, welcher außerhalb des Bereichs der Lichtaustrittsöffnung des Leuchtengehäuses angeordnet ist, auf. Darüber hinaus weist die Abdeckung eine dem Leuchtmittel abgewandte erste Oberfläche und eine dem Leuchtmittel zugewandte zweite Oberfläche auf, wobei die erste Oberfläche in dem sekundären Abschnitt einen Reflektionsbereich aufweist, welcher von dem Leuchtmittel weg gekrümmt oder abgewinkelt ist, wobei der Reflektionsbereich Licht, welches von dem Leuchtmittel durch die zweite Oberfläche auf den Reflektionsbereich auftrifft, total reflektiert und von der primären Abstrahlrichtung weglenkt.The invention provides a luminaire, in particular a ceiling or wall luminaire, with at least one luminous means, a luminaire housing and a transparent cover, the transparent cover for emitting light in a primary emission direction of the luminaire having a primary section which is arranged in the region of the light exit opening of the luminaire housing is, has. The cover further includes a secondary portion disposed outside the region of the light exit opening of the lamp housing. In addition, the cover has a first surface facing away from the luminous means and a second surface facing the luminous means, wherein the first surface in the secondary section has a reflection region which is curved away or angled away from the luminous means, the reflection region comprising light, which differs from the light source Illuminant impinges through the second surface on the reflection region, totally reflected and deflects away from the primary emission direction.

Erfindungsgemäß wird Licht, welches von dem Leuchtmittel abgestrahlt wird und auf der dem Leuchtmittel zugewandten zweiten Oberfläche in die transparente Abdeckung eintritt, teilweise in den sekundären Abschnitt geleitet, wo es auf den Reflektionsbereich trifft. Als Reflektionsbereich ist ein an der dem Leuchtmittel abgewandten ersten Oberfläche der transparenten Abdeckung in dem sekundären Abschnitt befindlicher Bereich vorgesehen. Dabei wird das Licht, welches an dem Reflektionsbereich total reflektiert wird, von der primären Abstrahlrichtung weggelenkt und z.B. in Richtung eines Umfangs der Leuchte umgelenkt. Dies kann eine Richtung quer, insbesondere senkrecht, und/oder entgegengesetzt zu der primären Lichtabstrahlrichtung der Leuchte sein. Die Leuchte kann zur Montage in oder an einer Decke oder Wand eingerichtet sein, wobei der Reflektionsbereich Licht, welches von dem Leuchtmittel durch die zweite Oberfläche auf den Reflektionsbereich auftrifft, total reflektiert und zumindest teilweise in Richtung der Decke bzw. Wand umlenkt.According to the invention, light which is emitted by the luminous means and enters the transparent cover on the second surface facing the luminous means is partially guided into the secondary section, where it meets the reflection region. As a reflection region, a region located on the side facing away from the luminous means, the first surface of the transparent cover is provided in the secondary region. At this time, the light which is totally reflected at the reflection area is deflected away from the primary radiation direction, e.g. deflected in the direction of a circumference of the lamp. This can be a direction transverse, in particular perpendicular, and / or opposite to the primary light emission direction of the luminaire. The luminaire can be designed for installation in or on a ceiling or wall, wherein the reflection region of light, which impinges from the luminous means through the second surface on the reflection area, totally reflects and at least partially deflects in the direction of the ceiling or wall.

Indem sie das auf den Reflektionsbereich auftreffende Licht von der primären Abstrahlrichtung weglenkt, erhält die Leuchte eine Lichtverteilungskurve mit einem sanfteren Übergang zwischen primären, in Richtung der primären Lichtabstrahlrichtung gelegenen, und sekundären zu beleuchtenden Winkelbereichen. Bei einer Ausbildung als Deckenleuchte wird z.B. nicht nur ein Flächenbereich direkt unterhalb der Leuchte angestrahlt, sondern auch eine daneben befindliche Fläche wie eine Wand und/oder die Decke, an oder in welcher die Leuchte montiert ist. Hierdurch wird ein Beleuchtungseindruck erreicht, bei welchem zu starke Gradienten in der Helligkeit vermieden werden.By deflecting the light incident on the reflection area from the primary radiation direction, the luminaire receives a light distribution curve with a smoother transition between primary, in the direction of the primary light emission direction, and secondary to be illuminated angle ranges. In an education as a ceiling light, for example, not only a surface area is illuminated directly below the lamp, but also an adjacent surface such as a wall and / or the ceiling on or in which the lamp is mounted. As a result, a lighting impression is achieved in which excessive gradients in the brightness are avoided.

Die primäre Lichtabstrahlrichtung kann eine Hauptabstrahlrichtung der Leuchte sein. Die primäre Lichtabstrahlrichtung kann auch durch eine Symmetrieachse der Lichtverteilungskurve der Leuchte gebildet sein. In einigen Ausführungsformen entspricht die primäre Lichtabstrahlrichtung der Leuchte einer Flächennormalen der ersten Oberfläche der transparenten Abdeckung in dem primären Abschnitt.The primary light emission direction may be a main emission direction of the luminaire. The primary light emission direction can also be formed by an axis of symmetry of the light distribution curve of the luminaire. In some embodiments, the primary light emission direction of the luminaire corresponds to a surface normal of the first surface of the transparent cover in the primary portion.

Durch die Anordnung des sekundären Abschnitts außerhalb der Lichtaustrittsöffnung des Leuchtengehäuses findet die Totalreflektion in einem Bereich statt, der nicht für die primäre Lichtabstrahlung benötigt wird. Auf diese Weise werden störende dunkle oder allzu helle Stellen im Bereich der Lichtaustrittsöffnung verhindert und somit größere Unterschiede in der Leuchtdichte vermieden.The arrangement of the secondary portion outside the light exit opening of the lamp housing, the total reflection takes place in a region that is not needed for the primary light emission. In this way, disturbing dark or too bright spots in the area of the light exit opening are prevented and thus greater differences in luminance are avoided.

Der Reflektionsbereich kann dadurch von dem Leuchtmittel weg gekrümmt oder abgewinkelt sein, dass er in Richtung der primären Lichtabstrahlrichtung der Leuchte gekrümmt oder abgewinkelt ist. Ein gekrümmter Reflektionsbereich ist bevorzugt, da dieser eine Totalreflektion über einen größeren Bereich erlaubt und eine weichere Lichtverteilungskurve ermöglicht. Der Reflektionsbereich kann insbesondere konkav gekrümmt sein.The reflection region may be curved or angled away from the light source such that it is curved or angled in the direction of the primary light emission direction of the light. A curved reflection area is preferred because it allows for total reflection over a larger area and allows a softer light distribution curve. The reflection region can in particular be concavely curved.

In einigen Ausführungsformen ist der Reflektionsbereich durch eine Krümmung oder Abwinklung der ersten Oberfläche gebildet, ohne dass in dieser eine Vertiefung, eine Nut, ein Vorsprung oder Ähnliches gebildet ist. Dies erlaubt eine einfachere Fertigung der Abdeckung und vermeidet störende Bereiche auf der ersten Oberfläche.In some embodiments, the reflection region is formed by a curvature or angling of the first surface without forming therein a depression, a groove, a projection, or the like. This allows a simpler production of the cover and avoids disturbing areas on the first surface.

Der primäre Abschnitt und der sekundäre Abschnitt der transparenten Abdeckung können einstückig gefertigt sein. Dies erlaubt eine einfache Fertigung und Montage der Leuchte. Der primäre und der sekundäre Abschnitt können benachbart sein. Die transparente Abdeckung kann insbesondere aus einem Kunststoff, z.B. Polymethylmetacrylat (PMMA) gefertigt sein. In einigen Ausführungsformen ist der sekundäre Abschnitt der transparenten Abdeckung von dem Leuchtmittel weg gekrümmt oder abgewinkelt.The primary portion and the secondary portion of the transparent cover may be made in one piece. This allows easy production and installation of the lamp. The primary and secondary sections may be adjacent. The transparent cover may in particular be made of a plastic, e.g. Polymethyl methacrylate (PMMA) be made. In some embodiments, the secondary portion of the transparent cover is curved or angled away from the bulb.

Licht, welches von dem Leuchtmittel durch die zweite Oberfläche auf den Reflektionsbereich auftrifft und dort total reflektiert wird, kann insbesondere von dem Leuchtmittel durch die zweite Oberfläche in dem primären Abschnitt in die transparente Abdeckung eintreten. In einigen Ausführungsformen kann alternativ oder zusätzlich Licht, welches von dem Leuchtmittel durch die zweite Oberfläche auf den Reflektionsbereich auftrifft und dort total reflektiert wird, von dem Leuchtmittel durch die zweite Oberfläche in einem Übergangsabschnitt der Abdeckung zwischen dem primären Abschnitt und dem sekundären Abschnitt in die transparente Abdeckung eintreten.Light which is incident from the illuminant through the second surface onto the reflection region and is totally reflected there, can in particular enter the transparent cover from the illuminant through the second surface in the primary portion. In In some embodiments, alternatively or additionally, light incident from the illuminant through the second surface to the reflection region and totally reflected therefrom may be diffused by the illuminant through the second surface in a transition portion of the cover between the primary portion and the secondary portion enter.

Gemäß einer bevorzugten Ausführungsform weist die transparente Abdeckung ferner auf der zweiten Oberfläche eine Lichteinkoppelstruktur, insbesondere eine Prismenstruktur, auf, welche Licht, welches von dem Leuchtmittel auftrifft, in die transparente Abdeckung einkoppelt und bricht, so dass es zumindest teilweise auf den Reflektionsbereich trifft. Die Lichteinkoppelstruktur lenkt auf diese Weise einen größeren Anteil des von dem Leuchtmittel abgestrahlten Lichts in den sekundären Abschnitt zu dem Reflektionsbereich. Der Anteil des in die Umgebung der Leuchte abgegebenen Lichts wird hierdurch erhöht.According to a preferred embodiment, the transparent cover further comprises on the second surface a Lichteinkoppelstruktur, in particular a prismatic structure, on which light, which impinges from the light source, coupled into the transparent cover and breaks, so that it at least partially meets the reflection region. In this way, the light-coupling structure directs a larger proportion of the light emitted by the luminous means into the secondary section to the reflection region. The proportion of light emitted into the environment of the lamp is thereby increased.

Besonders bevorzugt ist dabei, dass die Lichteinkoppelstruktur in dem primären Abschnitt der transparenten Abdeckung angeordnet ist. Auf diese Weise sind keine weiteren Abschnitte an der transparenten Abdeckung erforderlich. Insbesondere kann der primäre Abschnitt, welcher gleichzeitig die Lichtabstrahlung in die primären Lichtabstrahlrichtung bestimmt, zum Umlenken eines Lichtanteils in Richtung des Reflektionsbereichs eingesetzt werden.It is particularly preferred that the Lichteinkoppelstruktur is arranged in the primary portion of the transparent cover. In this way, no further sections are required on the transparent cover. In particular, the primary section, which at the same time determines the light emission in the primary light emission direction, can be used for deflecting a light component in the direction of the reflection zone.

Gemäß einer bevorzugten Ausführungsform verlässt die Lichtstrahlung nach der Totalreflexion die Abdeckung durch eine den Reflektionsbereich gegenüberliegende Auskoppelfläche des sekundären Abschnitts. Diese ermöglicht eine einfache Fertigung der Abdeckung, da keine weiteren Abschnitte der transparenten Abdeckung erforderlich sind, um das Licht nach der Totalreflexion weiterzuleiten. Besonders bevorzugt ist, dass die Auskoppelfläche eine Teilfläche der zweiten Oberfläche in dem sekundären Abschnitt darstellt. Dies vereinfacht die Fertigung weitergehend, da die erste und zweite Oberfläche über beide Abschnitte der Abdeckung zur Gestaltung der Lichtverteilungskurve eingesetzt werden können, ohne dass weitere Vorrichtungen erforderlich sind. Diese können jedoch in einigen Ausführungsformen außerdem vorgesehen sein, um die Lichtverteilungskurve weitergehend zu gestalten.According to a preferred embodiment, the light radiation after the total reflection leaves the cover by a coupling area of the secondary section which lies opposite the reflection area. This allows easy production of the cover, since no further portions of the transparent cover are required to forward the light after the total reflection. It is particularly preferred that the decoupling surface is a partial surface of the second surface in the secondary section. This further simplifies the manufacturing because the first and second surfaces can be used over both portions of the cover to form the light distribution curve without the need for further devices. However, in some embodiments, these may also be provided to further refine the light distribution curve.

In einer bevorzugten Ausführungsform weist die transparente Abdeckung an der Lichtauskoppelfläche mehrere Facetten auf. Diese können so ausgeführt sein, dass das Licht noch weitere Male reflektiert wird, bevor es die transparente Abdeckung an der Auskoppelfläche verlässt. Die Facetten können eben oder gekrümmt, insbesondere konkav oder konvex gekrümmt ausgeführt sein. Die Facetten ermöglichen es insbesondere, eine gewünschte Austrittsrichtung und eine gewünschte Lichtbündelung oder Lichtaufweitung des austretenden Lichts vorzugeben. In einigen Ausführungsformen verlaufen die Facetten stufenförmig. Zumindest einige der Stufen können dabei eine Fläche aufwiesen, welche parallel zu der primären Lichtabstrahlrichtung verlaufen. Durch diese Flächen kann das austretende Licht quer zu der primären Lichtabstrahlrichtung gebrochen werden, so dass es gezielt in Richtung eines Umfangs der Leuchte umgelenkt wird.In a preferred embodiment, the transparent cover has a plurality of facets on the light outcoupling surface. These can be designed so that the light is reflected even more times before it leaves the transparent cover on the decoupling surface. The facets can be flat or curved, in particular concave or convexly curved. In particular, the facets make it possible to specify a desired exit direction and a desired light bundling or light expansion of the exiting light. In some embodiments, the facets are step-shaped. At least some of the steps may have an area that runs parallel to the primary light emission direction. Through these surfaces, the exiting light can be broken transversely to the primary light emission direction, so that it is deflected in a targeted manner in the direction of a circumference of the luminaire.

In einer bevorzugten Ausführungsform verläuft die transparente Abdeckung in dem primären Abschnitt eben. Gegenüber einer Ausführungsform, in welcher die transparente Abdeckung konvex gekrümmt ist, wird hierdurch eine geringere Bauhöhe der Leuchte erreicht. Ferner ist die Abdeckung für den Betrachter weniger auffällig.In a preferred embodiment, the transparent cover extends flat in the primary section. Compared to an embodiment in which the transparent cover is convexly curved, thereby a smaller overall height of the lamp is achieved. Furthermore, the cover for the viewer is less noticeable.

In einigen Ausführungsformen weist das Leuchtengehäuse ferner ein oder mehrere Mittel zur Lichtlenkung, insbesondere einen oder mehrere Reflektoren oder Reflektorabschnitte auf. Die Mittel zur Lichtlenkung können insbesondere so gestaltet sein, dass sie Licht von dem Leuchtmittel in die primäre Lichtabstrahlrichtung und/oder in Richtung der Lichtaustrittsöffnung des Leuchtengehäuses umlenken.In some embodiments, the luminaire housing further comprises one or more means for directing light, in particular one or more reflectors or reflector sections. The means for directing the light can in particular be designed so that they redirect light from the luminous means into the primary light emission direction and / or in the direction of the light exit opening of the luminaire housing.

In einer bevorzugten Ausführungsformen ist die transparente Abdeckung in dem primären Abschnitt durchgängig. In diesen Ausführungsformen weist die transparente Abdeckung im primären Abschnitt keine Durchgangslöcher auf. Auf diese Weise kann der gesamte Bereich der transparenten Abdeckung im primären Abschnitt zur Einstellung einer gewünschten Lichtverteilungskurve genutzt werden. Ferner wird in diesen Ausführungsformen ein besserer Schutz vor herabfallenden Teilen, beispielsweise Splittern einer Leuchtstoffröhre erreicht. Darüber hinaus wird ein direkter Blick des Betrachters auf das Leuchtmittel verhindert. Insbesondere bei LEDs oder OLEDs als Leuchtmittel ist dies vorteilhaft, da diese eine hohe Leuchtdichte aufweisen können. In einigen Ausführungsformen verläuft die transparente Abdeckung zusätzlich oder alternativ in dem sekundären Abschnitt durchgängig. Durch das Vermeiden von Durchgangslöchern in dem sekundären Abschnitt wird eine ungewünschte Reflexion oder Streuung des durch den sekundären Abschnitt verlaufenden Lichts vermieden. In einer bevorzugten Ausführungsform ist der primäre Abschnitt der transparenten Abdeckung auf der ersten und/oder auf der zweiten Oberfläche zumindest zum Teil mit einer lichtbrechenden Struktur, insbesondere mit einer Prismenstruktur versehen. Die Prismenstruktur kann direkt in der ersten bzw. zweiten Oberfläche der Abdeckung integriert sein. Alternativ oder zusätzlich kann sie als Folie oder als weitere Platte an der Oberfläche der Abdeckung vorgesehen sein. Die Prismenstruktur kann von der ersten bzw. zweiten Oberfläche der Abdeckung nach außen weisen, d.h. zur Lichtaustrittsfläche oder zum Leuchtmittel. Bei der Verwendung von Prismenfolien oder Prismenplatten können die Prismen in Richtung des zumindest einen Leuchtmittels oder davon weg weisen. Ferner kann vorgesehen sein, die lichtbrechende Struktur bereichsweise auf der ersten bzw. zweiten Oberfläche der Abdeckung auszubilden.In a preferred embodiment, the transparent cover is continuous in the primary section. In these embodiments, the transparent cover in the primary portion has no through-holes. In this way, the entire area of the transparent cover in the primary section can be used to set a desired light distribution curve. Furthermore, in these embodiments, a better protection against falling parts, such as splinters of a fluorescent tube is achieved. In addition, a direct view of the viewer is prevented on the bulb. This is advantageous, in particular in the case of LEDs or OLEDs as lighting means, since they can have a high luminance. In some embodiments, the transparent cover extends additionally or alternatively throughout the secondary portion. By avoiding through-holes in the secondary portion, undesired reflection or scattering of the light passing through the secondary portion is avoided. In a preferred embodiment, the primary portion of the transparent cover on the first and / or on the second surface is at least partially provided with a refractive structure, in particular with a prism structure. The prism structure may be integrated directly in the first and second surfaces of the cover. Alternatively or additionally, it may be provided as a foil or as a further plate on the surface of the cover. The prism structure can face outward from the first or second surface of the cover, ie to the light exit surface or to the light source. When prism sheets or prism sheets are used, the prisms may point in the direction of the at least one luminous means or away from it. Furthermore, it can be provided to form the refractive structure in regions on the first or second surface of the cover.

In einer bevorzugten Ausführungsform umgibt der sekundäre Abschnitt den primären Abschnitt zumindest teilweise, bevorzugt vollständig. In diesen Ausführungsformen kann Licht, welches in verschiedenen Bereichen des primären Abschnitts in die transparente Abdeckung eintritt, zu dem Reflektionsbereich gelenkt werden. Hierdurch wird eine radiale Lichtabstrahlung in mehrere oder sogar alle seitlichen Umgebungsbereiche der Leuchte ermöglicht.In a preferred embodiment, the secondary section surrounds the primary section at least partially, preferably completely. In these embodiments, light entering the transparent cover in different areas of the primary portion may be directed to the reflection area. As a result, a radial light emission into several or even all lateral surrounding areas of the luminaire is made possible.

In einer bevorzugten Ausführungsform bildet der sekundäre Abschnitt zumindest teilweise einen Rand der transparenten Abdeckung. Auf diese Weise kann das Licht nach der Totalreflexion direkt an die Umgebung abgegeben werden, ohne dass es noch weitere Abschnitte der transparenten Abdeckung passieren muss. Hierdurch wird eine zusätzliche Streuung oder anderweitige ungewollte Beeinflussung des Lichts vermieden.In a preferred embodiment, the secondary portion at least partially forms an edge of the transparent cover. In this way, after the total reflection, the light can be emitted directly to the environment without having to pass through further sections of the transparent cover. As a result, an additional scattering or otherwise unwanted influence of the light is avoided.

Die transparente Abdeckung kann Mittel zur Befestigung an dem Leuchtengehäuse, insbesondere Schraublöcher, Rasthaken, Löcher oder Ausnehmungen aufweisen. Die Mittel zur Befestigung können insbesondere in einem Übergangsabschnitt zwischen dem primären und dem sekundären Abschnitt vorgesehen sein.The transparent cover may have means for attachment to the luminaire housing, in particular screw holes, latching hooks, holes or recesses. The means for attachment may be provided in particular in a transition section between the primary and the secondary section.

In einem weiteren Aspekt stellt die Erfindung eine transparente Abdeckung für eine Leuchte nach einem der vorhergehenden Ansprüche bereit, wobei die transparente Abdeckung zur Lichtabstrahlung in eine primäre Abstrahlrichtung einen primären Abschnitt aufweist und ferner einen sekundären Abschnitt sowie eine erste Oberfläche und eine der ersten Oberfläche gegenüberliegende zweite Oberfläche aufweist, wobei die erste Oberfläche in dem sekundären Abschnitt einen Reflektionsbereich aufweist, welcher konkav gekrümmt oder gegenüber der ersten Oberfläche in dem primären Abschnitt abgewinkelt ist und bemessen ist, um Licht, welches in dem primären Abschnitt auf der zweiten Oberfläche in die transparente Abdeckung eintritt und auf den Reflektionsbereich auftrifft, total zu reflektieren und von der primären Lichtabstrahlrichtung wegzulenken, insbesondere in Richtung eines Umfangs der Abdeckung umzulenken.In a further aspect, the invention provides a transparent cover for a luminaire according to any one of the preceding claims, wherein the transparent cover for light emission in a primary emission direction has a primary portion and further comprises a secondary portion and a first surface and a second surface opposite the first surface Surface having the first surface in the secondary Portion has a reflection portion which is concavely curved or angled relative to the first surface in the primary portion and dimensioned to totally reflect light entering the primary portion on the second surface in the transparent cover and incident on the reflection area, and to deflect away from the primary light emission direction, in particular to deflect in the direction of a circumference of the cover.

Insbesondere kann die Abdeckung auf der zweiten Oberfläche in dem primären Abschnitt eine Lichteinkoppelstruktur, insbesondere eine Prismenstruktur, aufweisen. Die Lichteinkoppelstruktur kann bevorzugt in einer Umgebung eines Übergangs zwischen dem primären und dem sekundären Abschnitt vorgesehen sein.In particular, the cover on the second surface in the primary section can have a light coupling-in structure, in particular a prism structure. The light-coupling structure may preferably be provided in an environment of a junction between the primary and secondary portions.

Weitere Merkmale und Vorteile der vorliegenden Erfindung werden anhand der nachfolgend beschriebenen bevorzugten Ausführungsform deutlich. In den Figuren ist Folgendes dargestellt:

Figur 1
zeigt einen schematischen Querschnitt durch eine Ausführungsform einer Leuchte.
Figur 2
zeigt einen Ausschnitt eines Querschnitts einer Ausführungsform einer Leuchte mit eingezeichnetem Strahlengang.
Other features and advantages of the present invention will become apparent from the preferred embodiment described below. The figures show the following:
FIG. 1
shows a schematic cross section through an embodiment of a lamp.
FIG. 2
shows a section of a cross section of an embodiment of a luminaire with a marked beam path.

Eine Leuchte der vorliegenden Erfindung ist insbesondere als Deckeneinbau- oder Deckenanbauleuchte oder als Wandeinbau- oder Wandanbauleuchte ausgeführt. Die Leuchte umfasst ein oder mehrere Leuchtmittel 2, insbesondere eine oder mehrere Leuchtstoffröhren oder eine Anordnung von LEDs oder OLEDs. Das Leuchtmittel 2 ist in einem Leuchtengehäuse 3 angeordnet. In dem Leuchtengehäuse 3 sind darüber hinaus Reflektoren 5 angeordnet, welche von dem Leuchtmittel 2 abgestrahltes Licht in Richtung einer Lichtaustrittsöffnung des Leuchtengehäuses 3 umlenken. Vor der Lichtaustrittsöffnung des Leuchtengehäuses 3 befindet sich eine transparente Abdeckung 4.A luminaire of the present invention is designed in particular as a ceiling recessed or ceiling surface-mounted luminaire or as a wall-mounted or wall-mounted luminaire. The luminaire comprises one or more light sources 2, in particular one or more fluorescent tubes or an arrangement of LEDs or OLEDs. The luminous means 2 is arranged in a luminaire housing 3. Reflectors 5 are also arranged in the luminaire housing 3, which deflect light emitted by the luminous means 2 in the direction of a light exit opening of the luminaire housing 3. In front of the light exit opening of the luminaire housing 3 there is a transparent cover 4.

Die transparente Abdeckung 4 umfasst einen zentral gelegenen primären Abschnitt 41, welcher sich durch die Lichtaustrittsöffnung des Leuchtegehäuses 3 erstreckt und diese vollständig abdeckt. Ferner weist die transparente Abdeckung 4 sekundäre Abschnitte 42 auf, welche sich außerhalb der Lichtaustrittsöffnung des Leuchtengehäuses 3 befinden. Die sekundären Abschnitte 42 sind dabei als Rand der transparenten Abdeckung 4 ausgebildet.The transparent cover 4 comprises a centrally located primary section 41, which extends through the light exit opening of the light housing 3 and completely covers it. Further, the transparent cover 4 has secondary portions 42 which are outside the light exit opening of the lamp housing 3. The secondary sections 42 are formed as an edge of the transparent cover 4.

Die in der Figur 1 dargestellte Leuchte weist eine primäre Lichtabstrahlung auf, welche um eine primäre Lichtabstrahlrichtung 71 herum verläuft. Bei einem Einsatz der Leuchte als Deckenleuchte verläuft die primäre Lichtabstrahlrichtung 71 vertikal nach unten, so dass hierdurch der Boden unterhalb der Leuchte beleuchtet wird. Die primäre Lichtabstrahlung verläuft durch den primären Abschnitt 41 der transparenten Abdeckung 4 und kann durch diesen gezielt beeinflusst werden, um eine gewünschte Lichtverteilungskurve der primären Lichtabstrahlung einzustellen. Hierzu kann der primäre Abschnitt 41 eine Prismenstruktur 413 aufweisen, wie sie in Figur 2 dargestellt ist.The in the FIG. 1 The luminaire shown has a primary light emission which extends around a primary light emission direction 71. When using the lamp as a ceiling light, the primary light emission direction 71 extends vertically downwards, so that in this way the floor is illuminated below the lamp. The primary light emission passes through the primary portion 41 of the transparent cover 4 and can be selectively influenced by the latter in order to set a desired light distribution curve of the primary light emission. For this purpose, the primary portion 41 may have a prism structure 413 as shown in FIG FIG. 2 is shown.

Darüber hinaus weist die Leuchte auch eine sekundäre Lichtabstrahlung auf, welche in Richtung 72, 72' eines Umfangs der Leuchte ausgerichtet ist. Die sekundäre Lichtabstrahlung verläuft in seitlicher Richtung und quer zu der primären Lichtabstrahlrichtung 71. Die sekundäre Lichtabstrahlung verlässt die Leuchte in den sekundären Abschnitten 42 wie im Folgenden anhand der Figur 2 erläutert.In addition, the lamp also has a secondary light emission, which is aligned in the direction 72, 72 'of a circumference of the luminaire. The secondary light emission extends in the lateral direction and transversely to the primary light emission direction 71. The secondary light emission leaves the light in the secondary sections 42 as described below with reference to FIG FIG. 2 explained.

Figur 2 zeigt einen Ausschnitt eines Querschnitts durch eine Leuchte. Dargestellt ist ein Bereich des Leuchtengehäuses 3 sowie ein Reflektorbereich 5. Darüber hinaus zeigt Figur 2 einen sekundären Abschnitt 42 sowie einen Teil des primären Abschnitts 41 der transparenten Abdeckung 4. Ein Lichtanteil 6, welcher von dem Leuchtmittel kommt, tritt auf der dem Leuchtmittel zugewandten ersten Oberfläche 412 in die transparente Abdeckung ein. Zur besseren Einkopplung des Lichts 6 ist an der dem Leuchtmittel zugewandten ersten Oberfläche 412 in den primären Abschnitt 41 eine Prismenstruktur 414 vorgesehen. Die Prismenstruktur 414 dient dem verbesserten Einkoppeln des von dem Leuchtmittel kommenden Lichts 6 in die transparente Abdeckung 4, wobei eine Reflektion des Lichts 6 an dieser Stelle weitestgehend vermieden wird. Ferner bricht die Prismenstruktur 414 das auftreffende Licht 6 und lenkt es zumindest teilweise in Richtung eines Reflektionsbereichs der Abdeckung 4, so dass es unter einem die Bedingung der Totalreflektion erfüllenden Winkel auf den Reflektionsbereich auftrifft, wie im Folgenden näher beschrieben ist. FIG. 2 shows a section of a cross section through a lamp. Shown is a portion of the lamp housing 3 and a reflector portion 5. In addition, shows FIG. 2 a secondary portion 42 and a portion of the primary portion 41 of the transparent cover 4. A light portion 6, which comes from the bulb, enters the transparent cover on the first surface 412 facing the bulb. For better coupling of the light 6, a prism structure 414 is provided in the primary portion 41 on the first surface 412 facing the light source. The prism structure 414 serves for the improved coupling of the light 6 coming from the illuminant into the transparent cover 4, whereby a reflection of the light 6 at this point is largely avoided. Further, the prism structure 414 breaks the incident light 6 and directs it at least partially toward a reflection area of the cover 4 so as to be incident on the reflection area under an angle satisfying the condition of total reflection, as described in more detail below.

Licht 6, welches auf die Prismenstruktur 414 trifft, wird dort zumindest teilweise gebrochen und in die transparente Abdeckung 4 eingekoppelt. Es trifft anschließend auf die dem Leuchtmittel abgewandte erste Oberfläche 421 in dem sekundären Abschnitt 42. Die erste Oberfläche 421 in dem sekundären Abschnitt 42 ist dabei in einem Reflektionsbereich von dem Leuchtmittel weg, d.h. konkav gekrümmt. Das Licht 6 wird von dem Refklektionsbereich total reflektiert und trifft auf die zweite Oberfläche 422 der transparenten Abdeckung 4 in dem sekundären Abschnitt 42. An der zweiten Oberfläche 422 in dem sekundären Abschnitt 42 sind Facetten 424 in der Form von Stufen vorgesehen. Das Licht 6 verlässt die transparente Abdeckung 4 durch die Facetten 424 und verläuft in radiale Richtung in Richtung eines Umfangs der Leuchte wie in Figur 1 mit dem Bezugszeichen 72 dargestellt. Die Facetten 424 erlauben es, die Lichtverteilungskurve der sekundären Lichtabstrahlung wie gewünscht einzustellen.Light 6, which strikes the prism structure 414, is at least partially refracted there and coupled into the transparent cover 4. It then hits the the In this case, the first surface 421 in the secondary section 42 is in a reflection region away from the luminous means, ie concavely curved. The light 6 is totally reflected from the reflec- tion area and strikes the second surface 422 of the transparent cover 4 in the secondary portion 42. On the second surface 422 in the secondary portion 42, facets 424 are provided in the form of steps. The light 6 leaves the transparent cover 4 through the facets 424 and extends in the radial direction in the direction of a circumference of the luminaire, as in FIG FIG. 1 represented by the reference numeral 72. The facets 424 allow the light distribution curve of the secondary light output to be adjusted as desired.

Die transparente Abdeckung 4 weist ferner auf der dem Leuchtmittel 2 abgewandten ersten Oberfläche 411 in dem primären Abschnitt 41 eine Prismenstruktur 413 auf. Diese ermöglicht eine Einstellung der Lichtverteilungskurve der primären Lichtabstrahlung.The transparent cover 4 furthermore has a prism structure 413 in the primary section 41 on the first surface 411 facing away from the luminous means 2. This allows adjustment of the light distribution curve of the primary light emission.

Ferner weist die transparente Abdeckung 4 auf der dem Leuchtmittel 2 zugewandten zweiten Oberfläche einen Vorsprung 43 auf. Der Vorsprung 43 befindet sind am Übergang zwischen dem primären Abschnitt 41 und dem sekundären Abschnitt 42. Der Vorsprung 43 liegt im montierten Zustand an einer Seitenwand des Leuchtengehäuses 3 an. Hierdurch wird das Innere des Leuchtengehäuses nach außen abgeschlossen, so dass kein Staub o.ä. eindringen kann. Ferner ermöglicht der Vorsprung 43 ein Ausrichten der Abdeckung 4 relativ zum Leuchtengehäuse 3 während der Montage. An dem Vorsprung können Mittel zur Befestigung der Abdeckung 4 an dem Leuchtengehäuse 3 vorgesehen sein wie z.B. ein oder mehrere Bohrungen, Vorsprüunge, Rücksprünge und/oder Haken (in Fig. 2 nicht gezeigt).Furthermore, the transparent cover 4 has a projection 43 on the second surface facing the luminous means 2. The projection 43 is located at the transition between the primary portion 41 and the secondary portion 42. The projection 43 is in the mounted state on a side wall of the lamp housing 3 at. As a result, the interior of the lamp housing is closed to the outside, so that no dust or similar. can penetrate. Further, the projection 43 allows aligning the cover 4 relative to the lamp housing 3 during assembly. On the projection means for fixing the cover 4 may be provided on the lamp housing 3 such as one or more holes, Vorsprüunge, recesses and / or hooks (in Fig. 2 Not shown).

Modifikationen der vorstehend beschriebenen Ausführungsform sind möglich. Insbesondere kann der Reflektionsbereich in dem sekundären Abschnitt gegenüber der ersten Oberfläche in dem primären Abschnitt abgewinkelt sein.Modifications of the embodiment described above are possible. In particular, the reflection region in the secondary portion may be angled away from the first surface in the primary portion.

Bezugszeichenliste:LIST OF REFERENCE NUMBERS

22 LeuchtmittelLamp 33 Leuchtengehäuseluminaire housing 44 transparente Abdeckungtransparent cover 55 Reflektorreflector 66 Lichtlight 4141 primärer Abschnittprimary section 4242 sekundärer Abschnittsecondary section 4343 Vorsprunghead Start 411, 421411, 421 erste Oberflächefirst surface 412, 422412, 422 zweite Oberflächesecond surface 413413 lichtbrechende Strukturrefractive structure 414414 Prismenstrukturprismatic structure 424424 Facettenfacets 7171 primäre Lichtabstrahlrichtungprimary light emission direction 72, 72'72, 72 ' sekundäre Lichtabstrahlrichtungsecondary light emission direction

Claims (11)

Leuchte, insbesondere Decken- oder Wandleuchte, mit zumindest einem Leuchtmittel, einem Leuchtengehäuse (3) und einer transparenten Abdeckung (4), wobei die transparente Abdeckung (4) zur Lichtabstrahlung in eine primäre Abstrahlrichtung (71) der Leuchte einen primären Abschnitt (41), welcher im Bereich der Lichtaustrittsöffnung des Leuchtengehäuses (3) angeordnet ist, aufweist, und wobei die Abdeckung (4) ferner einen sekundären Abschnitt (42), welcher außerhalb des Bereichs der Lichtaustrittsöffnung angeordnet ist, aufweist,
wobei die Abdeckung (4) darüber hinaus eine dem Leuchtmittel abgewandte erste Oberfläche (411, 421) und eine dem Leuchtmittel zugewandte zweite Oberfläche (412, 422) aufweist,
wobei die erste Oberfläche (421) in dem sekundären Abschnitt (42) einen Reflektionsbereich aufweist, welcher von dem Leuchtmittel weg gekrümmt oder abgewinkelt ist, wobei der Reflektionsbereich Licht (6), welches von dem Leuchtmittel durch die zweite Oberfläche (412) auf den Reflektionsbereich auftrifft, total reflektiert und von der primären Abstrahlrichtung (71) weglenkt.Luminaire, in particular ceiling or wall luminaire, with at least one luminous means, a luminaire housing (3) and a transparent cover (4), the transparent cover (4) for emitting light in a primary emission direction (71) of the luminaire having a primary section (41) which is arranged in the region of the light exit opening of the luminaire housing (3), and wherein the cover (4) furthermore has a secondary section (42) which is arranged outside the region of the light exit opening,
the cover (4) furthermore having a first surface (411, 421) facing away from the luminous means and a second surface (412, 422) facing the luminous means,
wherein the first surface (421) in the secondary portion (42) has a reflection region which is curved or angled away from the light source, the reflection region light (6) passing from the light source through the second surface (412) to the reflection region impinges, totally reflected and deflects away from the primary emission direction (71). Leuchte nach Anspruch 1, wobei die transparente Abdeckung (4) ferner auf der zweiten Oberfläche (412) eine Lichteinkoppelstruktur (414), insbesondere eine Prismenstruktur, aufweist, welche Licht (6), welches von dem Leuchtmittel auftrifft, in die transparente Abdeckung (4) einkoppelt und bricht, so dass es zumindest teilweise auf den Reflektionsbereich trifft.Luminaire according to claim 1, wherein the transparent cover (4) further comprises on the second surface (412) a light coupling structure (414), in particular a prism structure, which light (6) which impinges on the light source, in the transparent cover (4 ) and breaks, so that it at least partially meets the reflection area. Leuchte nach Anspruch 2, wobei die Lichteinkoppelstruktur (414) in dem primären Abschnitt (41) der transparenten Abdeckung (4) angeordnet ist.Luminaire according to claim 2, wherein the light input structure (414) in the primary portion (41) of the transparent cover (4) is arranged. Leuchte nach einem der vorhergehenden Ansprüche, wobei die Lichtstrahlung (6) nach der Totalreflexion die Abdeckung (4) durch eine dem Reflektionsbereich gegenüberliegende Auskoppelfläche des sekundären Abschnitts (42) verlässt, wobei die Auskoppelfläche insbesondere eine Teilfläche der zweiten Oberfläche (422) in dem sekundären Abschnitt (42) darstellt.Luminaire according to one of the preceding claims, wherein the light radiation (6) after total reflection, the cover (4) by a reflection region opposite coupling surface of the secondary portion (42), wherein the decoupling surface in particular a partial surface of the second surface (422) in the secondary Section (42) represents. Leuchte nach Anspruch 4, wobei die transparente Abdeckung (4) an der Auskoppelfläche mehrere Facetten (424) aufweist.Luminaire according to claim 4, wherein the transparent cover (4) has a plurality of facets (424) on the decoupling surface. Leuchte nach einem der vorhergehenden Ansprüche, wobei die transparente Abdeckung (4) in dem primären Abschnitt (41) eben verläuft.Luminaire according to one of the preceding claims, wherein the transparent cover (4) extends in the primary section (41). Leuchte nach einem der vorhergehenden Ansprüche, wobei die transparente Abdeckung (4) in dem primären (41) und/oder dem sekundären (42) Abschnitt durchgängig ist.Luminaire according to one of the preceding claims, wherein the transparent cover (4) in the primary (41) and / or the secondary (42) section is continuous. Leuchte nach einem der vorhergehenden Ansprüche, wobei der primäre Abschnitt (41) der transparenten Abdeckung (4) auf der ersten und/oder auf der zweiten Oberfläche (411, 412) zumindest zum Teil mit einer lichtbrechenden Struktur (413), insbesondere mit einer Prismenstruktur, versehen ist.Luminaire according to one of the preceding claims, wherein the primary portion (41) of the transparent cover (4) on the first and / or on the second surface (411, 412) at least partially with a refractive structure (413), in particular with a prismatic structure , is provided. Leuchte nach einem der vorhergehenden Ansprüche, wobei der sekundäre Abschnitt (42) den primären Abschnitt (41) zumindest teilweise, bevorzugt vollständig umgibt.Luminaire according to one of the preceding claims, wherein the secondary portion (42) at least partially, preferably completely surrounds the primary portion (41). Leuchte nach einem der vorhergehenden Ansprüche, wobei der sekundäre Abschnitt (42) zumindest teilweise einen Rand der transparenten Abdeckung (4) bildet.Luminaire according to one of the preceding claims, wherein the secondary portion (42) at least partially forms an edge of the transparent cover (4). Transparente Abdeckung (4) für eine Leuchte nach einem der vorhergehenden Ansprüche, wobei die transparente Abdeckung (4) zur Lichtabstrahlung in eine primäre Abstrahlrichtung (71) einen primären Abschnitt (41) aufweist und ferner einen sekundären Abschnitt (42) sowie eine erste Oberfläche (411, 421) und eine der ersten Oberfläche (411, 421) gegenüberliegende zweite Oberfläche (412, 422) aufweist,
wobei die erste Oberfläche (421) in dem sekundären Abschnitt (42) einen Reflektionsbereich aufweist, welcher konkav gekrümmt oder gegenüber der ersten Oberfläche (411) in dem primären Abschnitt (41) abgewinkelt ist und bemessen ist, um Licht (6), welches in dem primären Abschnitt (41) auf der zweiten Oberfläche (412) in die transparente Abdeckung (4) eintritt und auf den Reflektionsbereich auftrifft, total zu reflektieren und von der primären Abstrahlrichtung (71) wegzulenken.A transparent cover (4) for a luminaire according to any one of the preceding claims, wherein the transparent cover (4) for light emission in a primary emission direction (71) has a primary portion (41) and further comprises a secondary portion (42) and a first surface (42). 411, 421) and a second surface (412, 422) opposite the first surface (411, 421),
wherein the first surface (421) in the secondary portion (42) has a reflection region which is concavely curved or angled relative to the first surface (411) in the primary portion (41) and dimensioned to receive light (6) which is incident in the primary portion (41) on the second surface (412) enters the transparent cover (4) and impinges on the reflection area, totally reflecting and deflecting away from the primary radiation direction (71).
EP13158218.1A 2012-03-29 2013-03-07 Lamp with peripheral light emission Not-in-force EP2644976B1 (en)

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DE102012102732.3A DE102012102732B4 (en) 2012-03-29 2012-03-29 Luminaire with light emission in a border area

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US11649949B2 (en) 2021-04-01 2023-05-16 Ideal Industries Lighting Llc Luminaires having multiple lighting distributions
WO2023131513A1 (en) * 2022-01-04 2023-07-13 Signify Holding B.V. A luminaire kit
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DE102013208292A1 (en) * 2013-05-06 2014-11-06 Itz Innovations- Und Technologiezentrum Gmbh LED light with glare control
DE102013018549A1 (en) * 2013-11-05 2015-05-07 Siteco Beleuchtungstechnik Gmbh lighting device

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US11828434B2 (en) 2019-05-20 2023-11-28 Ideal Industries Lighting Llc LED light fixtures with waveguide edge
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WO2023131513A1 (en) * 2022-01-04 2023-07-13 Signify Holding B.V. A luminaire kit

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DE102012102732A1 (en) 2013-10-02
DE102012102732B4 (en) 2015-12-31

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