DE102014207640A1 - Arrangement for emitting light for arrangement on a luminaire housing - Google Patents

Abstract

An arrangement for emitting light (1), which is provided for arrangement on a lamp housing (102), preferably on its outer circumference, has: elongated illuminants, which are preferably formed by at least one LED circuit board (3), a lens body (10), the length of which corresponds approximately to the length of the lamps, and an opal profile body (20) which is arranged and shaped with respect to the lens body (10) in such a way that, together with a portion (13) of the light exit surface of the lens body facing away from the lamps (10) encloses a cavity (30).

Description

The present invention relates to an arrangement for emitting light, which is provided in particular for the arrangement on the outer circumference of the housing of a luminaire.

In addition to the primary task, namely to illuminate a subjacent area, luminaires are often also used to achieve further lighting effects. It is particularly known, in addition to a direct lighting, so a light output to a below the light area, also to realize an indirect lighting, in which an area above the lamp, so for example the ceiling of the room in which the lamp is arranged brightened becomes. In addition, so-called accent lighting or accent lights are known, which can be realized in different ways. A known embodiment, for example, is that the luminaire housing itself, for example, its edge or frame area is easily illuminated. The appearance of the luminaire is to be further improved by such effects, even if an accent lighting does not contribute directly to the lighting of a room.

Lately, LEDs are increasingly being used as light sources. These have, together with their associated optics on a preferred emission direction, which is also due to the fact that the LEDs are usually arranged on a flat board. Compared to fluorescent lamps, which emit light over their entire circumference, so LED light sources can emit light only in half of the solid angle range.

If, for example, a pendant luminaire with LED-based light sources is to be realized, the LEDs are usually arranged in such a way that they are optimally positioned and arranged for direct light emission downwards. For an indirect light output to the top then either the use of separate bulbs is required or the light of the LEDs must be divided in a complex manner and delivered in two opposite directions, but this greatly affects the efficiency of direct lighting. If, in addition, the previously mentioned accent light is then also to be realized, namely that the housing or parts of the housing should light up easily, additional additional light sources are usually required.

The present invention is therefore based on the object to provide a novel arrangement for light emission available, which combines several functions in itself. In particular, the arrangement should be suitable for providing light on the one hand for indirect lighting and on the other hand for an accent light in a luminaire.

The object is achieved by an arrangement for emitting light, which has the features of claim 1. Advantageous developments of the invention are the subject of the dependent claims.

The arrangement according to the invention is preferably intended to be arranged on a luminaire housing, in particular on its outer circumference. It has elongate lamps, which are formed in particular by at least one LED board. In addition, a lens body arranged in front of the light sources are provided, the length of which corresponds approximately to the length of the light sources, and an opal profile body. With regard to the lens body, this profile body is arranged and shaped in such a way that it encloses a cavity together with a partial region of the light exit surface of the lens body facing away from the light source. The arrangement according to the invention of the profile body relative to the lens body has the consequence that a portion of the light is passed through the lens body in the cavity and then distributed over the opal profile body distributed over the surface. This proportion of light can be used in particular to realize the desired accent light. On the other hand, another part of the light is emitted directly via the lens body and can then be e.g. be used for the desired indirect lighting.

• • längliche Leuchtmittel, welche vorzugsweise durch mindestens eine LED-Platine gebildet sind,
• • einen Linsenkörper, dessen Länge etwa der Länge der Leuchtmittel entspricht, sowie
• • einen opalen Profilkörper, der im Hinblick auf den Linsenkörper derart angeordnet und geformt ist, dass er gemeinsam mit einem Teilbereich der den Leuchtmittel abgewandten Lichtaustrittsfläche des Linsenkörpers einen Hohlraum umschließt.

Therefore, an arrangement for emitting light is proposed according to the invention, which is provided for arrangement on a luminaire housing, in particular on its outer circumference, the arrangement comprising:

• Elongated luminous means, which are preferably formed by at least one LED board,
• • a lens body whose length corresponds approximately to the length of the lamps, as well as
• • An opal profile body, which is arranged and shaped with respect to the lens body in such a way that it encloses a cavity together with a portion of the light emitting surface of the lens body facing away from the light source.

Preferably, the lens body has a recess facing the bulbs, in which the bulbs at least partially protrude. In particular, in the case of the use of LEDs as light sources is ensured in this way that the light emitted by the LEDs light can be used substantially completely. The Recess of the lens body, the bottom surface of which then forms its light entrance surface, preferably has a convex curvature.

The light exit surface of the lens body is divided as already mentioned by the profile body in two surface areas. In this case, both regions are preferably curved in each case in a convex manner, it being possible in particular for the two surface regions to meet one another at an angle of approximately 90 °. This embodiment takes into account the task, namely that on the one hand the light emitted via the lens body to brighten the laterally disposed opal profile body to realize the accent light, on the other hand, typically at a right angle to this light is to be issued for the indirect lighting. Also, the opal profile body is preferably convexly curved in this case, in particular, it can pass continuously into the corresponding surface of the lens body.

An attachment of the various elements with each other is preferably ensured by the fact that the lens body has at its light exit surface a projection for engagement with a longitudinal side of the profile body. Both lens body and profile body can also have locking means, by means of which they can be easily attached to the lamp housing. In this case, the arrangement according to the invention can only be provided on mutually opposite longitudinal sides of a housing. However, it would also be conceivable that the arrangement extends circumferentially over the entire circumference of a lamp housing away.

According to the present invention, a lamp is also proposed with a lamp housing and a arranged on the outer circumference of the lamp housing corresponding arrangement for emitting light. The Lichthauptabstrahlrichtung the bulbs of the inventive arrangement is in this case perpendicular to a light emitting surface of the lamp. Accordingly, therefore, the light emitted by the arrangement according to the invention light can actually be used for accent lighting and for indirect lighting.

The invention will be explained with reference to the accompanying drawings. Show it:

1 a sectional view of a lamp with an inventive arrangement for light output;

2 an enlarged view of the arrangement according to the invention for light emission;

3 a forehead area of the light of 1 in exploded view;

4 a second variant of a lamp with an inventive arrangement for light output;

5 an enlarged view of the arrangement for emitting light in the lamp according to 4 and

6 A third embodiment of an inventive arrangement for light emission.

1 shows as a possible application example of the present invention, a pendant lamp 100 , which is intended for example to illuminate an underlying workplace. In this case, light having relatively high lumen packets must be delivered to the bottom within a predetermined angular range. Inside of a profile body 101 formed luminaire housing 102 are therefore parallel to each other two longitudinally extending LED boards as the primary light sources 105 the light 100 intended. Both LED boards 105 is each a corresponding optics 106 assigned, via which the light is emitted directed to the bottom, the design of the light sources and the associated optics for the present invention plays a minor role. In the middle between the two light units of the luminaire 100 are then in the housing 102 appropriate resources 107 for the electrical power supply of the light sources 105 arranged.

As already mentioned, it is the light 100 from 1 around a pendant light, that is, the case 102 is spaced from a support member, for example, the ceiling of a room arranged. This is done in the present case via appropriate cable suspensions 108 which is at the top of the case 102 attack and lead to the ceiling.

In such an arrangement of a lamp, an indirect lighting is often desired, since this results in a more pleasant appearance. This means that light is to be delivered upwards in the direction opposite to the main emission direction, in order to reach the one above the luminaire 100 or at least slightly lighten the area located laterally above. It is obvious that for these purposes the primary light sources 105 can not be used because they are designed to efficiently emit light toward the bottom. Although it would be conceivable to use a special optics, via which a part of the light is coupled out and then released in the opposite direction, but this is relatively expensive and would also reduce the efficiency for direct lighting.

At the light 100 according to 1 in addition, the housing should light up slightly in the lateral area, which is made possible by so-called accent lighting. Of course, this could also be the light sources 105 not be used or only with great effort.

With the help of the solution according to the invention now the possibility is opened to realize both additional tasks - indirect lighting and accent light - in a relatively simple manner. Although, in turn, additional bulbs are required, but now these additional bulbs can then be used together for the indirect light as well as for the accent light.

The lighting arrangement according to the invention is according to the representation of 1 on the outside of the luminaire housing 102 appropriate. In the present case, an arrangement on the two opposite longitudinal sides of the housing 102 intended. The order 1 initially has oblong bulbs in the form of an LED board 2 with associated LEDs 3 on. Depending on the length of the luminaire housing 102 can also be provided in the longitudinal direction one behind the other several boards two, since the inventive arrangement preferably over the entire length of the lamp housing 102 should extend. The board 2 is in the illustrated embodiment on the outer surface of the lamp housing 102 arranged fitting and accordingly oriented perpendicular to the plane of the light emitting surface lamp. The light output of these additional light sources is influenced by means of two optical elements, on the one hand via an elongated lens body 10 as well as an opalesque profile 20 ,

The light sources are, as already mentioned, LEDs, whereby both white light LEDs and colored LEDs could be used. In particular, when using RGB LEDs particularly appealing lighting effects can be achieved because now the indirect and accent lighting can also be adjusted in terms of their color - possibly dynamically.

The lens body 10 or the rod lens forms the primary optics for the arrangement 1 and points first to its LEDs 3 zugwandten area a recess 11 whose bottom surface is the light entrance surface of the lens body 10 forms. The LEDs 3 protrude into this recess 11 slightly in, ensuring that the light emitted by LEDs in a wide range of angles can be fully utilized. The floor area 12 the recess 11 is curved convexly, which can be influenced by modifying the curvature influence on the light distribution, as will be explained in more detail below.

The opal profile body 20 should ultimately appear as a luminous outer surface of the lamp housing. Accordingly, it consists of a light-scattering material, which is designed in such a way that it appears as uniformly bright as possible. However, this is only possible if the light is correspondingly uniform on the inner surface 21 of the profile body 20 is directed. This is the lens body 10 responsible. More precisely, a first partial area is taken 13 the outer surface of the lens body 10 the light emitted in such a way that it in the desired manner on the profile body 20 falls.

Like the presentation 2 can be removed, the profile body encloses 20 however, not completely the light emitting surface of the lens body 10 , Instead, he walks on a lateral upper end on the lens body 10 to and is here via corresponding locking projections 19 respectively. 29 with the lens body 10 locked. At this - viewed in cross-section - corner is thus the outer surface of the lens body 10 divided into two surface sections, on the one hand in the already mentioned lateral surface section 13 over which the light on the profile body 20 thrown to the other in the upper surface section 14 which directly faces the environment. The shape of both this second surface section 14 of the lens body 10 as well as the profile body 20 is chosen such that viewed from the outside as a whole compared to a horizontal central axis results in a substantially symmetrical, continuous shape.

Light, which from the LEDs 3 emitted and in the lens body 10 is then delivered in two different ways, which are shown schematically by the arrows A and B.

Corresponding to the path A, the light entry surface of the lens body 10 So over the floor area 12 the recess 11 entering light rays are initially slightly deflected and then fall on the surface section 13 , At suitable angles of incidence, these light rays will be at the junction to the cavity as shown 30 totally reflected and deflected so that they are on the upper surface section 14 to meet. There, the light rays can then the lens body 10 leave and are accordingly in an area above the lamp 100 issued. So they serve in this case the desired indirect lighting. It should be noted that in the same way also the case may occur that light rays, which in the upper region of the light entry surface 12 in the lens body 10 enter, directly to the light emitting surface 14 arrive without first on the surface section 13 to be totally reflected.

On the other hand, another part of the light rays, in particular that part which is rather over the lower region of the recess 11 in the lens body 10 enters, meets at the area B according to the path B at angles 13 on, in which no total reflection takes place. These light rays can then enter the cavity 30 enter and meet the opal profile body 20 over which they are then discharged laterally - preferably diffusely. By this effect is achieved that the profile body 20 is lightened over its entire cross-section and accordingly appears bright.

In this case, different additional measures may be provided to uniform illumination of the profile body 20 continue to improve. It would be conceivable, for example, the shape of the lens body 10 in a special way to modify and / or decoupling on the lens surface 13 to realize. Also a double-walled embodiment of the profile body 20 would be advantageous, since in this way an even better light mixing is achieved. However, this can alternatively or additionally be improved by the fact that between the LEDs 3 and the profile body 20 an additional diffuser, such as a foil or the like is introduced.

By appropriate design of the curvatures, in particular the floor surface 12 the recess 11 as well as the surface section 13 In doing so, the relationship between the light beams used for indirect lighting and the light beams that can be used for accent lighting can be changed. About the shape of the surface section 14 In turn, the distribution of the light can be used for the indirect lighting, with area sections 13 and 14 are preferably convex shaped and are aligned so that they merge into each other at approximately a right angle.

With the help of relatively few elements can therefore be provided in the context of the present invention, a lighting arrangement that simultaneously fulfills several functions. The attachment of the arrangement 1 takes place in Pictured embodiment in that the lens body 10 as well as the profile body 20 at her the housing 102 the light 100 facing ends each latching arms or corresponding projections 18 respectively. 28 have, with the help of a simple snapping or oblong pushing on the lamp housing 102 is possible. Possibly. This can also be a corresponding clamping of the LED board 2 on the outside wall of the housing 102 done so that no further fastening measures are required.

3 , which is the end of the lamp 100 with the laterally arranged components of the lighting arrangement 1 shows in exploded view, makes it clear once again that the additional arrangement for light emission, despite its complex light output consists of a few individual parts. A fixing of the arrangement in the axial direction can then be carried out in a simple manner that on the end faces of the housing 102 corresponding end caps 110 be placed, which at the same time the arrangement for light emission 1 fix. In this case, as an alternative to the illustrated variant, in which the LED board 2 on the outside of the luminaire housing 2 forming profile body abuts, also be provided that the board is positioned within the profile body. About openings in the profile body or an elongated recess then radiate the LEDs 3 Light in the region of the light entrance opening of the lens body 10 ,

A second embodiment of a pendant lamp, in which the arrangement according to the invention for emitting light 1 is used in is 4 shown. The essential difference here is that the light output to the bottom is done in a different way than in the embodiment of 1 to 3 , The lamp 100 or the housing is in this case as a hollow light guide 125 executed, in each of which coupled over the long sides of light, distributed and then discharged to the bottom. The bulbs required for this purpose can be easily with the inventive arrangement for light output 1 be combined, in which case it is then provided that s.der the LEDs 3 opposite side of the board 2 additional LEDs 120 are arranged. These engage in a corresponding opening or longitudinal recess of the lamp housing 102 a and accordingly emit light into the interior 125 of the light pipe. With regard to the configuration of the arrangement for the indirect lighting and for the accent light, however, there are no further differences from the exemplary embodiment described above.

6 shows a third variant of an inventive arrangement, in turn, the same elements are provided with the same reference numerals. In this case, a double row LED board is provided, parallel to the LEDs 3 , the light in the lens body 10 irradiate, more LEDs 25 are arranged, which are outside the recess 11 of the lens body 10 such that they emit light directly into the cavity 30 , which is now partly limited by the board, irradiate. Regarding the emission of the light of the LEDs 3 the above applies. About the lens body 10 So part of the light is used for indirect lighting and another part in the cavity 30 radiated and finally released through the opal profile body. The additional LEDs 25 on the other hand, light radiates directly into the cavity 30 a, this light then exclusively for the illumination of the profile body 20 is used for the accent light and thereby the uniformity of the illumination of the profile body 20 if necessary, it can be further optimized.

Thankful would be in the embodiment of 6 also that the other LEDs 25 separated from the LEDs 3 can be controlled and thus the accent light can be set individually at least to a certain extent. Furthermore, it would also be conceivable that the LEDs 3 and 25 each light of different color and / or color temperature. Furthermore, in this embodiment, additional LEDs on the back of the board 2 be provided, which according to the embodiment of 4 and 5 Light in the interior 125 irradiate a light waveguide.

As already mentioned, the arrangement according to the invention can not only - as shown in the figures - be arranged on two opposite longitudinal sides of a lamp housing. It would also be conceivable, in particular, that the arrangement extends completely over the entire circumference of the housing, that is, it is then curved at the corner areas, so that a luminaire frame that shines completely over the circumference can be realized. Even with Leuchtenghäusen that is oval or circular use of the arrangement would be conceivable.

Accordingly, the arrangement according to the invention can be used extremely flexibly and can be used to simultaneously fulfill a plurality of lighting technology tasks at a relatively low cost.

Claims (14)

Arrangement for emitting light ( 1 ), which for arrangement on a luminaire housing ( 102 ), is preferably provided on the outer periphery, wherein the arrangement ( 1 ): elongated luminous means, which preferably by at least one LED board ( 3 ), • a lens body ( 10 ), whose length corresponds approximately to the length of the lamps, and • an opal profile body ( 20 ), which, with regard to the lens body ( 10 ) is arranged and shaped in such a way that, together with a subregion ( 13 ) of the bulbs facing away from the light exit surface of the lens body ( 10 ) a cavity ( 30 ) encloses. Arrangement for emitting light according to claim 1, characterized in that the lens body ( 10 ) a the bulbs facing recess ( 11 ), in which the bulbs at least partially protrude. Arrangement for emitting light according to claim 1 or 2, characterized in that the recess ( 11 ) of the lens body ( 10 ) has a convex curvature. Arrangement for emitting light according to one of the preceding claims, characterized in that the light exit surface of the lens body ( 10 ) through the profile body ( 20 ) in two areas ( 13 . 14 ), which are preferably both convexly curved. Arrangement for emitting light according to claim 4, characterized in that the two surface areas ( 13 . 14 ) of the light exit surface of the lens body ( 10 ) meet at an angle of about 90 °. Arrangement for emitting light according to one of the preceding claims, characterized in that the opal profile body ( 20 ) is convexly curved. Arrangement for emitting light according to one of the preceding claims, characterized in that the lens body ( 10 ) at its light exit surface a projection for engagement with a longitudinal side of the profile body ( 20 ) having. Arrangement for emitting light according to one of the preceding claims, characterized in that the lens body ( 10 ) as well as the profile body ( 20 ) Locking means ( 18 . 28 ) for latching with the luminaire housing ( 2 ) exhibit. Arrangement for emitting light according to one of the preceding claims, characterized in that the profile body ( 20 ) is double-walled. Arrangement for emitting light according to one of the preceding claims, characterized in that between the light sources ( 2 ) and the profile body ( 20 ) A diffuser is arranged. Arrangement for emitting light according to one of the preceding claims, characterized in that these additional light sources ( 25 ), which direct light into the cavity ( 30 ). Lamp ( 100 ) with a luminaire housing ( 102 ) as well as one on the luminaire housing ( 102 ) in particular arranged on the outer circumference arrangement for emitting light ( 1 ) according to one of the preceding claims. Luminaire according to claim 12, characterized in that a Lichthauptabstrahlrichtung the bulbs perpendicular to a light emitting surface of the lamp ( 100 ). Luminaire according to claim 12 or 13, characterized in that the arrangement for light emission ( 1 ) additional bulbs ( 120 ), which light into an interior area ( 125 ) of the luminaire ( 100 ) submit.

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