DE10153756B4 - Luminaire with segmented inner reflector - Google Patents

Abstract

lamp with a lamp arrangement corresponding to a non-straight line, in particular with a ring lamp (5), and with an external (1) and an inner (3) reflector assembly, wherein the inner reflector assembly (3) within the outer reflector assembly (1) is arranged and the lamp assembly (5) designed and set up is, that you Light incident on the inner reflector assembly (3), wherein the inner reflector arrangement (3) at least one beam limiting section (10) having a reflective base (12), which to a light exit surface (20) of the lamp is inclined at an acute angle, such that this base (12) in the direction away from the light exit surface (20) extends obliquely outwards, characterized characterized in that inner reflector assembly (3) on or in said beam limiting section several reflective side surfaces (14, 16) which faces projecting the inclined reflecting base (12) at an angle.

Description

The The invention relates to luminaires in which a reflector arrangement from the outside from a concentrically arranged ring or arcuate lamp or group of lamps is irradiated light and down to a light exit surface is diverted. In this case, the reflector assembly, together with one forming the light exit surface translucent Element, one or more hollow light guide form. The invention concerns in particular such luminaires, in which an outer and a inner reflector arrangement are provided and light directly or indirectly via the translucent element and the outer reflector assembly is delivered.

It are lamps with a ring lamp, an inner and an outer reflector known, in which the ring lamp, the inner reflector substantially surrounds and the outer reflector over and outside the ring lamp is arranged. In addition, the outer reflector opposite below the ring lamp is a primary reflector arranged, which downwardly radiated light of the ring lamp to the outer reflector deflects, as a secondary reflector acts. Such lights have a first light exit opening between the lower primary reflector and the outer reflector and another light exit opening in the region of the inner Reflectors on. In general, the inner reflector is to the associated with it light exit opening formed tapering point. It forms a cone shape or a Funnels whose tips are roughly in the middle and at the level of the associated light exit opening lies and whose sidewalls gradually rise, so that the outer edge of the funnel from the associated light exit opening on farthest away. The funnel is almost at the top on the associated light exit opening, the outer sides of the funnel are irradiated by the ring lamp and the light on the light exit opening reflect.

at Ring lamps is basically a part of the light emitted by the lamp inside to a in the direction of radiation opposite Lamp segment impinge, which reduces the efficiency. This can only partially by using the funnel-shaped reflector be improved. Such obliquely between the reflectors running rays are also detrimental to the shielding. There at this angle extending rays of the angle of incidence on the outer reflector, which causes the radial shield is unfavorable, become partial Light rays emitted at a shallower angle than that of the shielding conditions is required and thus in the shielded Angle range higher Luminance generated.

EP 1 106 916 A2 discloses a luminaire with a radiation-limiting reflector arrangement. The luminaire has one or two rectilinear, tubular lamps which are each surrounded by a reflector arrangement. The end faces of the reflector assembly are each covered with a reflective side wall. The light exit opening is covered with a prism plate.

EP 1 120 600 A1 discloses a light guide lamp with a linear prismatic structure. In a continuous full-fiber or hollow fiber light is coupled laterally by means of one or more tubular lamps light. On the light exit side a cover plate is provided with a prismatic structure. According to one embodiment, a cylindrical full light guide with a ring lamp is also disclosed.

The post-published publication DE 100 11 304 A1 discloses various embodiments of hollow fiber optic lights having a prism plate on the light exit side and a sloping roof reflector. According to one embodiment, a ring lamp with a cylindrical light guide is also provided. All described embodiments have a continuous light guide.

It The object of the invention is a luminaire of the aforementioned Kind available to provide, which with the same basic construction, a higher efficiency and has an improved shield.

These The object is achieved by a Luminaire with a lamp assembly according to claim 1 solved.

The Invention may provide in particular that the lamp assembly of a single ring lamp consists. However, it can also provide that several straight or curved or punctiform Lamps along a curve in a plane to a lamp assembly, for example in the form of a polygon, an ellipse, one Circle or the like are arranged.

The Invention may provide that the side surfaces extend in the radial direction.

According to an axisymmetric embodiment of the invention, the side surface or the side surfaces extend to the axis of symmetry of the inner reflector assembly or an inner edge of the base and in the other direction to the radial outer edge of the inner Reflector assembly.

The Invention may provide that the largest extension the reflective side surfaces in the direction perpendicular to the plane of the light exit surface the height the inner reflector assembly is.

The Invention may provide that the inner reflector arrangement a plurality of adjoining beam boundary sections each having one inclined to the light exit surface reflective base and which by reflecting walls inclined by these Protrude surfaces, are separated from each other.

The Invention may provide that the Beam limiting sections through a single wall with two reflective Pages are separated.

The Invention may provide that at least two adjoining beam-limiting sections through two parallel walls are separated from each other, which preferably directly to each other issue.

The Invention may provide that the inclined ground surfaces the beam limiting sections in the inner reflector arrangement are arranged funnel-like.

The Invention may provide that the bases of the Beam limiting sections in the inner reflector assembly a area forming the cloak of a cone, a pyramid, a truncated cone or a truncated pyramid corresponds.

The Invention may provide that each said beam confining portions of the inner reflector assembly is formed by a three-dimensional reflector segment and the inner reflector assembly of immediately adjacent reflector segments is constructed.

The Invention may provide that the Lamp assembly is arranged so that it the inner reflector assembly Completely or on a part of the circumference encloses.

The Invention may provide that the side walls a beam limiting section located on the side of the light exit up to a translucent Extend element on which they preferably stand up.

The Invention may provide that the translucent Element an area having a refractive structure, in particular a prism structure, is provided.

The Invention may provide that the refractive structure at least in one direction a shield produced by the light exiting through them.

The In particular, the invention can provide that the prism structure is linear, radial outward having extending prisms. However, it can also be pyramidal or truncated pyramidal Prisms, parallel line-shaped Prisms or the like, which a shield of the exiting light in at least one direction. The translucent element can also several in light exit opening have a prism structure lying one behind the other, their shielding properties complement each other.

The Invention may provide that the base surface and the side walls a beam limiting portion of the inner reflector assembly together with a portion of the translucent element together one Form hollow conductor, the one of at least partially reflective walls having limited cavity, wherein over one side of this hollow waveguide Light from one or more lamps coupled into the light pipe will and light over the translucent Element is decoupled.

The Side on which light is coupled into the light pipe, can according to a embodiment be open to the invention.

The Invention may provide that between the outer reflector assembly and the outer end one or more side walls the beam limiting sections or between the inner and outer reflector arrangement there is a gap through which light up to the indirect lighting or down for direct lighting can escape.

Of the Space can be in the area of the light exit surface a translucent Element, which at the same time also the translucent element may be, which is the portions of the inner reflector assembly to the light exit side closes, be completed. According to one preferred embodiment However, this gap is open in the area of the light exit surface.

The invention also provides a luminaire with a plurality of hollow waveguides, which have a cavity which is delimited on several sides by walls which are at least partially reflective and in which light is coupled to a lamp via one side, wherein at least a part of the light coupled by the lamp is reflected from or between the reflective walls and is coupled out via a partially reflective translucent wall, wherein at least two hollow light conductors directly adjoin one another.

According to the invention, it is provided that page the light pipe, where they adjoin one another, from the side, at which light is coupled from a lamp is different.

The The invention may provide that the two light guides separated by a common wall.

The Invention may provide that the Hollow light guide are arranged so that in at least two directly adjacent hollow fiber from substantially the same direction Light preferably the light of a single lamp, coupled becomes.

The Invention may provide that the the light exit surface across from lying reflective surface one or more light pipe is inclined.

The Invention may provide that the Hollow fiber conductor arranged surface-filling are.

The Invention may provide that the Hollow light conductor in a box-shaped Arrangement are arranged.

The Invention may provide that the Hollow light guide in a fan-shaped arrangement are arranged.

The Invention may provide that the Wall of the light pipe at the side where they adjoin opaque is.

For certain Applications, however, the wall may be at least partially translucent.

specially In luminaires with hollow fiber optics one often has the problem that a uneven lighting at big Illuminating surfaces results. Here, the luminaire according to the invention provides a remedy.

The Invention will be described in more detail below with reference to the attached Drawings closer described. Show it

1 a schematic cross-sectional view of a lamp according to the invention,

2 the inner reflector arrangement of a lamp according to the invention with the lamp and the primary reflector,

3a a side view of a reflector segment according to the invention,

3b a view of a reflector segment according to the invention obliquely from above,

3c a view of a reflector segment according to the invention obliquely, seen from the light entry side,

4 a schematic representation of the problems of a lamp according to the prior art,

5 a schematic representation of the beam path in a luminaire according to the invention.

Designed as a ceiling light embodiment of the 1 has an outer reflector 1 and a general with 3 designated inner reflector assembly. A ring lamp 5 surrounds the inner reflector assembly 3 , Below the lamp 5 is a primary reflector 6 arranged, which downwardly radiated light of the ring lamp 5 deflects to the outer reflector, which acts as a secondary reflector. Between the primary reflector 6 and the outer reflector 1 there is a light exit opening 7 , about which the at the outer reflector 1 reflected light exits. As the primary reflector 6 the ring lamp 5 covering down, is the lamp 5 not directly visible.

How to get by 1 and 2 can recognize, there is the inner reflector assembly 3 from reflector segments 10 , In the case of this embodiment, eight such reflector segments 10 inside a flat outer ring 11 fan or cake are arranged directly adjacent to each other. They form towards the light exit opening (arrow A in FIG 2 ) on its upper side a funnel-shaped surface. Instead of 8 reflector segments, any other suitable number of segments, eg 4 to 12 segments, may be provided.

The embodiment of a reflector segment 10 is more accurate in 3a to 3c shown. Each reflector segment 10 has a triangular basic shape and has a circular segment-shaped roof wall 12 as well as two to the roof wall 12 down angled side walls 14 and 16 on. The inward facing sides (facing downwards in the drawing) of the roof wall 12 and the side walls 14 and 16 are formed diffuse or specularly reflective. The outer side 18 Each reflector segment is, as well as the bottom, each open. The height of each reflector segment 10 takes each from the open outer side 18 to the top of the circular segment-shaped roof wall 12 in the middle of the reflector arrangement 3 to zero, leaving the top of this roof wall 12 at the height of the lower edge of the side walls 14 and 16 lies. The two side walls 14 and 16 have substantially the same slope to the roof wall 12 in the illustrated embodiment, that of the open side 18 seen from left side wall 14 opposite the roof wall 12 is inclined inwards and the opposite side wall 16 outward. Of course, this can also be the other way around. An important feature of the reflector assembly according to the invention 3 is that the side walls 14 and 16 the same orientation and the same angle relative to the base of the reflector segment 10 so that the reflector segments complement each other when placed against each other. They are designed so that the roof walls 12 directly adjoining reflector segments 10 , as in 1 and 2 shown to form a substantially continuous funnel-shaped surface. The side walls 14 and 16 are formed so that they are in the arrangement of 1 parallel to the adjacent wall of the nearest reflector segment 10 are.

The side walls 14 to 16 stand on a translucent plate 20 on which the area of the entire inner reflector assembly 3 covered so that each reflector segment 10 along with the corresponding section of the plate covered by it 20 forms a radially outwardly open hollow light guide. In each of these hollow fibers is from the outside of the lamp 5 over the open side 18 Light coupled and light from the light pipe over the translucent plate 20 decoupled. The plate 20 is provided with a prism structure, which light from the area of the respective reflector segment 10 decoupled, wherein the prism structure is formed such that it causes a shielding of the decoupled light according to the requirements for interior lighting. Corresponding prism shapes and designs are made, for example U.S. Patent 5,396,350 . U.S. Patent 5,555,109 , WO 00/16006 or EP 1 055 870 A1 to which reference is hereby made by way of reference.

In the luminaire according to the invention, on the one hand, the light exit opening 7 placed between the outer secondary reflector 1 and the primary reflector 6 is formed, light emitted directly. This proportion of light corresponds to the majority of that of the radially outer part of the lamp 5 emitted light. On the other hand, the radially inward light becomes the reflector segments 10 coupled in and over the translucent panel 20 decoupled so that a total of two light exit surfaces, namely the light exit opening 7 and the translucent plate 20 result.

The side walls 14 and 16 prevent that in the basically funnel-shaped formation of the inner reflector assembly 3 Light of the lamp on an opposite portion of the lamp or the outer secondary reflector 1 or the primary reflector 6 is incident, as occurs in a funnel-shaped reflector without segmentation. This will increase the efficiency of the luminaire and the shielding of the light passing through the gap 7 is discharged, which between the outer secondary reflector 1 and the primary reflector 6 is formed, improved. This situation is in 4 and 5 schematically illustrated.

4 shows an arrangement with a simple funnel-shaped inner reflector 30 in the prior art within a ring lamp 32 , It is desirable that the light on the inner reflector 30 is reflected to a light exit opening, which is illustrated schematically by the beam path E. On the other hand, direct light from one radially inner part of the lamp onto another segment of the lamp (optical path UE) or part of the outer reflector reflecting it at a shallow angle (not shown) is undesirable since it leads to loss of efficiency or deterioration of the shielding properties leads.

5 schematically shows two beam paths in accordance with a luminaire according to the invention 1 , According to the beam path S1, the light of the ring lamp drops 5 first on the side wall 14 a, then from this back to the roof wall 12 reflected and then to the inner light exit opening, so the translucent plate 20 reflected. According to the beam path S2, the light of the lamp 5 on the other, outwardly inclined sides wamd 16 reflected and with a single reflection to the inner light exit surface, so the plate 20 reflected. In both cases, the light beam can not, as in 4 for an arrangement according to the prior art, incident on an opposite lamp or reflector portion

Numerous modifications of the embodiment described above are possible. For example, the number of reflector segments of the inner reflector assembly may be different. The shape of the reflector segments may be different. For example, for example, in the case of a quadrangular lamp arrangement, the basic form may be quadrangular. For a single luminaire, different reflector segments may have a different basic shape. While basic shapes are preferred which can be combined to form a surface-filling arrangement, a non-surface-filling arrangement of reflector segments can also be used be provided. The light emission from the spaces between reflector segments can be suppressed if necessary. While in the embodiments described above, the inner reflector assembly was constructed of individual reflector segments, the inner reflector assembly or a part thereof may also be integrally formed, for example as a plastic molding. The lamp itself may be a ring lamp or a curved lamp, but it may for example also be formed by a plurality of compact fluorescent lamps or point-shaped light sources arranged on a ring or a bent, arranged in a quadrangle or other non-straight line. The side walls of the reflector segments can for example be made of sheet metal, which are attached to a prefabricated funnel body, which forms the roof walls of the individual reflector segments, for example by means of a plug connection.

In an alternative embodiment of the luminaire according to the invention, the outer reflector could 1 be designed as Einkoppelreflektor, said Einkoppelreflektor the ring light 5 encloses and is designed for example in the form of an involute, so that the light emitted to the outside of the lamp is deflected in the direction of the interior of the lamp. The primary reflector 6 could then be omitted or becomes a part of the outer reflector assembly.

The in the claims, The description of disclosed features of the invention can be both individually as well as in any combination for the realization of the invention in their various embodiments be essential.

1

outer reflector

3

inner reflector assembly

5

ring lamp

6

primary reflector

7

Light opening

10

reflector segment

11

outer ring

12

roof wall

14

Side wall

16

Side wall

18

front a reflector segment

20

translucent plate

30

internal reflector

32

ring lamp

Claims (26)

Luminaire with a lamp arrangement corresponding to a non-straight line, in particular with a ring lamp ( 5 ), as well as with an outer ( 1 ) and an inner ( 3 ) Reflector arrangement, wherein the inner reflector arrangement ( 3 ) within the outer reflector assembly ( 1 ) is arranged and the lamp arrangement ( 5 ) is configured and arranged to emit light onto the inner reflector assembly ( 3 ), wherein the inner reflector arrangement ( 3 ) at least one beam limiting section ( 10 ) with a reflective base ( 12 ), which leads to a light exit surface ( 20 ) of the lamp is inclined at an acute angle, such that this base ( 12 ) in the direction away from the light exit surface ( 20 ) extends obliquely outwards, characterized in that the inner reflector arrangement ( 3 ) at or in said beam-limiting section a plurality of reflective side surfaces ( 14 . 16 ), which are opposite the inclined reflecting surface ( 12 ) protrude at an angle. Luminaire according to claim 1, characterized in that the side surfaces ( 14 . 16 ) extend in the radial direction. Luminaire according to claim 1 or 2, characterized in that the largest extent of the reflective side surfaces ( 14 . 16 ) in the direction perpendicular to the plane of the light exit surface ( 20 ) equal to the height of the inner reflector assembly ( 3 ). Luminaire according to one of claims 1 to 3, characterized in that the inner reflector arrangement ( 3 ) a plurality of adjoining beam boundary sections ( 10 ), each one to the light exit surface ( 20 ) inclined reflective surface ( 12 ) and which by the reflective side walls ( 14 . 16 ) are separated from each other. Luminaire according to claim 4, characterized in that at least two beam limiting sections ( 10 ) by a single side wall ( 14 . 16 ) are separated by two reflective sides. Luminaire according to claim 4, characterized in that at least two adjoining beam-limiting sections ( 10 ) by two side walls ( 14 . 16 ) are separated from each other. Luminaire according to one of claims 4 to 6, characterized in that the inclined base surfaces ( 12 ) of the beam-limiting sections ( 10 ) in the inner reflector arrangement ( 3 ) are arranged like a funnel. Luminaire according to claim 7, characterized in that the bases ( 12 ) of the beam-limiting sections ( 10 ) in the inner reflector assembly ( 3 ) form a surface which is the mantle of a cone, a pyramid, a truncated cone or a truncated pyramid corresponds. Luminaire according to one of claims 4 to 8, characterized in that each of said beam-limiting sections ( 10 ) of the inner reflector arrangement ( 3 ) by a three-dimensional reflector segment ( 10 ) is formed and the inner reflector assembly ( 3 ) of directly adjoining reflector segments ( 10 ) is constructed. Luminaire according to one of claims 1 to 9, characterized in that the lamp arrangement ( 5 ) is arranged so that it the inner reflector assembly ( 3 ) completely or on a part of the circumference encloses. Luminaire according to one of claims 1 to 10, characterized in that the side walls ( 14 . 16 ) of a beam limiting section ( 10 ) on the side of the light exit up to a translucent element ( 20 ). Luminaire according to claim 11, characterized in that the translucent element ( 20 ) has a surface provided with a refractive structure. Luminaire according to claim 12, characterized in that that the refractive structure at least in one direction a shield produced by the light exiting through them. Luminaire according to one of claims 1 to 13, characterized in that the base surface ( 12 ) and the side walls ( 14 . 16 ) of a beam-limiting section ( 10 ) of the inner reflector assembly together with a portion of the light-transmissive element ( 20 ) form a hollow light guide, one of at least partially reflective walls ( 12 . 14 . 16 ) has limited cavity, wherein over one side ( 18 ) of this light waveguide light is coupled by one or more lamps in the light pipe and light via the transparent element ( 20 ) is decoupled. Luminaire according to one of claims 1 to 14, characterized in that between the outer reflector arrangement ( 1 ) and the inner reflector assembly ( 3 ) there is a gap through which light can escape. Luminaire according to one of the preceding claims, characterized in that it has one of the outer reflector arrangement ( 1 ) opposite primary reflector ( 6 ), wherein the ring lamp ( 5 ) substantially between the outer reflector assembly ( 1 ) and the primary reflector ( 6 ) and between the outer reflector arrangement ( 1 ) and the primary reflector ( 6 ) a light exit opening ( 7 ), wherein the luminaire directly or indirectly illuminates light in the region between the outer reflector arrangement ( 1 ) and the primary reflector ( 6 ) so that it passes through the light exit opening ( 7 ) exit. Luminaire according to one of the preceding claims, characterized in that the reflective side surfaces ( 14 . 17 ) with respect to the reflective base ( 12 ) are inclined. Luminaire according to claim 17, characterized in that the side walls ( 14 . 15 ) compared to the base area ( 12 ) are inclined with the same orientation and the same angle. Luminaire with one or more lamps and a plurality of hollow waveguides, each having a cavity, which on several sides of at least partially reflective walls ( 12 . 14 . 16 ) and in which one side ( 18 ) Light is coupled to a lamp, wherein at least a part of the light coupled by the lamp at the reflective walls ( 12 . 14 . 16 ) and reflects light over a partially reflective translucent wall ( 20 ) is coupled out of the cavity, characterized in that at least two hollow light conductors in a direction parallel to a side of one of the two hollow light guides, via which light is coupled, directly adjacent to each other. Luminaire according to claim 19, characterized that the two hollow light conductors separated by a common wall are. Luminaire according to one of claims 19 or 20, characterized in that the hollow light guides are arranged so that in at least two directly adjacent hollow light guide on the same side ( 18 ) Light is coupled. Luminaire according to one of Claims 19 to 21, characterized in that the reflective surface ( 16 ) of one or more hollow light guides is inclined. Luminaire according to one of claims 19 to 22, characterized that the Hollow fiber conductor arranged surface-filling are. Luminaire according to one of claims 19 to 23, characterized that the Hollow light conductor in a box-shaped Arrangement are arranged. Luminaire according to one of claims 19 to 23, characterized that the Hollow light guide in a fan-shaped arrangement are arranged. Luminaire according to one of claims 19 to 25, characterized in that the wall of the hollow light guide on the side ( 14 . 16 ), at which they adjoin one another, is opaque to light.