EP1847763A1 - Multilateral illumination device with glare reduction - Google Patents

Abstract

A housing (12) with one or more openings (26,28,30) is configured to accommodate a fluorescent lamp (40), which emit radiation through the openings in predetermined angular range. A lateral micro prism plate (32) having a micro structure profile is provided for covering the openings of the housing to shield radiation of predetermined range from the selected portions, and a flat, transparent cover protects the micro structure profile of the micro prism plate.

Description

Technical area

The invention relates to a lighting arrangement comprising a housing, a light source arranged in the housing, the radiation of which emerges from the housing through one or more housing openings and means for deblasting this radiation, wherein at least one housing opening is arranged laterally.

State of the art

Interior lighting arrangements are usually either integrated into the wall or ceiling, provided thereon or suspended from the ceiling as pendant lights. The pendant lights usually have a cuboid, downwardly open housing. The suspension is attached to the top or ends of the housing.

In the known pendant lights, the light exits the downward opening from the housing. In order to avoid direct inspection of the lamp and thus caused glare, the opening is provided with fins.

There are also known plates which are provided on the surface with microprisms. At these microprisms, the light is deflected. When using such a micro prism plate in the outlet opening of a lamp housing glare of the viewer is avoided. A disadvantage of these plates is that they easily pollute and dust. Impurities and fingerprints are permanently visible on the surface. The handling of the sharp-edged plates can lead to injuries.

Disclosure of the invention

It is an object of the invention to provide a lighting arrangement of the type mentioned with improved lighting and easy handling.

According to the invention the object is achieved in that the housing cover is closed with a transparent cover, which is profiled on the outside with a microstructure, the microstructure in turn is provided with a transparent, smooth cover, wherein the microstructure is designed blinding. The microstructure may in particular be designed in such a way that the angular range visible to persons is blended.

In this arrangement, the radiation not only goes down but into any desired angular range. The resulting glare is avoided by using a cover with a microstructure. To avoid contamination and easier handling of this cover a further, smooth cover is provided on the profile. This additional cover is easy to clean and does not dirty easily. It is still manageable without risk of injury.

The housing openings may extend along the majority of the side areas and downwards, and the covers may be arranged in one or more frame parts. By using the profiled covers no glare can occur even with very large light exit openings.

The housing may have a rectangular cross section, of which both sides and the lower portion form housing openings, which are covered by flat plates with profiled surface. Alternatively, however, the housing may also have a polygonal, oval or circular cross section or another organic cross section.

It is also possible to provide forms whose cross section is variable over the length of the housing. Thus, the housing can be tapered at the ends, the housing can be designed arcuate or stepped like a staircase.

Preferably, the covers are made of pressed acrylic or glass. Alternatively, the cover may also be made of rolled material or foils. Made of pressed acrylic, the profile can be produced with the greatest precision. The covers can also consist of a fire-retardant plastic, in particular polycarbonate.

The microstructures may be microprisms, in particular outwardly projecting microprisms. A microprism has dimensions in the range of a few tenths of a millimeter. Alternatively, pressed, linear or crossed structures are possible. Preferably, the opening angle of the prisms or linear structures varies over the height of the opening. Then, the laterally radiated radiation can be directed specifically in a preferred angular range. Other angular ranges, however, are illuminated only slightly or not at all. In this way, on the one hand glare, on the other hand, an improved lighting in the desired direction.

Preferably, the housing comprises two end parts, which are connected to each other via frame parts, wherein the frame parts are held by parallel to the end portions extending, planar frames in addition in their position. The frame parts can be profiled struts that have the same cross section over the entire length. This allows a cost-effective production. The frames may be inserted in slots or grooves provided in the struts perpendicular to their longitudinal axis. The light source, to For example, a fluorescent lamp, can be passed through a recess in the frames.

Preferably, the end part has an opening into which connecting elements can be inserted. The fasteners can then be snapped or clamped. These fasteners can be variably selected. Depending on the application, different connecting elements are used in the same housing. This creates a modular system that can be easily adapted to the requirements.

In one embodiment of the invention, the connecting elements can be connected to one another in an articulated manner and / or with fastening devices. Then several lights can be connected together. The connection angle is variable.

There may be provided a plurality of illuminants with different wavelength spectrum and control means, via which the radiation intensities of the individual bulbs are adjustable. A light source can have a spectrum with particularly high intensity in the short-wave spectral range and another light source can have a spectrum with particularly high intensity in the longer-wave spectral range. Then, for example, the light may be varied between a cold, rather blue spectrum corresponding to a high radiation temperature and a warm, rather red spectrum corresponding to a low radiation temperature.

Embodiments of the invention are the subject of the dependent claims. Embodiments are explained below with reference to the accompanying drawings.

Brief description of the drawings

Fig.1

is an exploded view of a modular lighting arrangement

Fig.2

is a cross section through the illumination arrangement of Figure 1

Figure 3

is a longitudinal section through the illumination arrangement of Figure 1

Figure 4

is a perspective view of the open lighting arrangement of Figure 1

Figure 5

is a perspective view of the open lighting arrangement of Figure 4 with a different perspective

Figure 6

is a detailed view of the lighting arrangement of Figure 1

Figure 7

is a detail view of Figure 1 with an end portion and a connecting part.

Figure 8

is a section through two connecting parts.

Figure 9

is an enlarged perspective view of a micro prism plate.

Figure 10

is a cross section through a microprism plate with prisms of the same size

Figure 11

shows the beam path for the arrangement of Fig.10.

Figure 12

is a cross section through a micro prism plate with prisms with different prism angles in different areas.

Figure 13

shows the beam path for the arrangement of Fig.12.

Fig. 14

is a cross section through a micro prism plate with inwardly directed prisms.

Figure 15

shows the beam path for the arrangement of Fig.14.

Figure 16

illustrates an articulated joint with two lighting elements in exploded view.

Figure 17

Fig. 16 illustrates the joint of Fig. 16 from a different perspective.

Figure 18

Figure 16 illustrates a hinge for a plurality of light elements according to Figure 16 in assembled condition.

Figure 19

is a detailed representation of the lighting arrangement of Figure 1 with an electrical connector.

Fig. 20

is a detailed representation analogous to Fig.19 from another perspective.

Description of the embodiments

1 shows an exploded view of a modular lighting arrangement 10. 2 shows a cross section and in Figure 3 is a longitudinal section through the arrangement. 4 and 5 show the arrangement in the assembled state. In all figures, like parts are given the same reference numerals.

The lighting assembly comprises a housing 12. The housing 12 includes two parallel planar end portions 14 and 16. The end portions 14 and 16 are square and parallel. At the corners of the end portions 14 and 16 connecting struts 18, 20, 22 and 24 are inserted. The connecting struts are slightly longer than a fluorescent lamp of normal size. They connect the end parts 14 and 16.

The side openings 26 and 28 formed by the end portions 14 and 16 and the connecting struts 18, 20, 22 and 24 and the downward opening 30 are covered by microprism plates described in more detail below. In Fig. 1, only a lateral micro-prism plate 32 is indicated.

The upper opening 34 is covered by a metallic cover 36. This forms a wide groove along the entire length of the housing, in which the ballast 38 and the cable feeders are arranged. On the bottom of a fluorescent lamp 40 is attached. The cover 36 is provided in the lateral areas 42 with a plurality of parallel slots through which light can also escape (see also Fig.19). Moreover, the cover of the opaque material of the rest of the housing, for example, chromed metal or the like. The top of the cover is screwed centrally with another, transparent, opal cover 44 with the rest of the housing. For this purpose, screws 43 are provided. This allows expansion of the cover in both directions when heated. At the ends of the cover control holes 45 are provided. The operating holes 45 facilitate the removal of the cover, e.g. at maintenance. Corresponding holes 47 are provided in the cover 36.

The end parts 14 and 16 are provided with vertical, rectangular slots 46 (see also Fig.7). In the slots a cuboid projection 48 can be inserted, which sits on a connecting part 50. The connecting part has a vertical bore into which a tube 52 can be inserted. With the tube 52, the lamp is attached to a ceiling, for example. In the tube 52, the electrical leads for the supply of the light bulb are housed.

The slot 46 has on the inside in the lower edge and a projecting, roof-shaped profile 49. The connecting part 50 has a corresponding profile 51, which is also recognizable in FIG. The connecting part 50 is inserted in the assembly in the slot 46, so that the profiles are positively against each other. A retractable screw is screwed through a corresponding threaded hole 53 in the profile 51 (Fig. 7 and 8). The screw fixed in this way the connecting part in its position.

Since the arrangement is comparatively long, the struts 18, 20, 22 and 24 are provided with slots 60 into which ribs (support inserts) 54 made of metal or a transparent material are used. This is shown in more detail in cross-section in Figure 2 and in the detail view in Fig. 6.

The struts 18, 20, 22 and 24 are provided with circular projections 56 which extend in the direction of the illuminant 40. The projections 56 have a central bore 58. Slots 60 along the strut 18 serve as a receptacle for the frames 54. The frames 54 are flat and lie in a plane transverse to the connecting struts. They have four lugs 62, 64, 66 and 68 which extend in the direction of the connecting struts. Each of the flags is provided at its end with a bore which corresponds in the installed state with the bore 58 of the connecting strut 18. A wire or pipe threaded through the holes holds the frames and tie bars together. As long as the end caps are not mounted, the frames 54 are rotatably mounted about axes 55. This facilitates the assembly.

The covers 70 and the microprism plates 72 are ground on the outer edges 74. This is shown in FIG. The connecting struts and the end pieces 14 and 16 have a corresponding profile. This facet grinding is designed in particular at the end pieces so that tolerances due to the different expansion coefficients of the materials is compensated. It is considered that the end pieces must have greater tolerances due to the greater extent in this direction. The circumferential facet grinding allows the positive engagement between the plates and the castings (end parts) or the struts and the end parts.

Through the profiles, the covers are held in position. The side housing openings and the downwardly oriented housing opening are covered in this way with glass plates 70. On the inside of the glass plates 70 each micro prism plates 72 are arranged. The microprism plates 72 are pressed from acrylic. They have a plurality of microprisms projecting outwardly towards the glass plate 70. The glass plate protects according to the projections from damage and contamination.

FIG. 9 shows a detail of such a microprism plate 72 in detail. The microprisms 71 are in the present embodiment of pyramidal projections, which are arranged directly next to each other. The deflection of a light beam is determined inter alia by the inclination angles α and β of the prism surfaces. It has been found that a ratio of the height of the microprisms to the overall height of the structure of 1: 3 is particularly favorable to produce. The microprisms are smaller than 2 mm and are produced with high quality by pressing.

The effect of different angles on a laterally arranged microprism plate is shown in FIGS. 10 to 15. FIG. 10 shows a detail of a microprism plate 73. The prisms have an opening angle 75 of 60 °. FIG. 10 likewise shows a schematically illustrated illuminant 77. In Figure 11, the course of the light beams 79 is shown. The light rays 79 are deflected on the microprism plate 73 of FIG. It can be seen that in the configuration shown, within an observation angle 81 of 33.5 ° with respect to the horizontal 83, only very little radiation emerges, while the majority of the radiation concentrates in the steeply upwardly and downwardly directed areas. This avoids blinding observers in the more distant area. The space area below the luminaire, e.g. a workplace, on the other hand, is well lit. With such a lighting arrangement, therefore, the perception changes depending on the observer location. The observer entering a room sees little of the lamp and is not dazzled. The closer the observer gets to the lamp, the more it is illuminated.

FIGS. 12 and 13 show an arrangement in which the prism angle varies over the height of the illumination arrangement. As in the embodiment according to FIGS. 10 and 11, a prism angle of 60 ° is provided in the middle region 83 of the microprism plate 85. In the upper area 87, the prisms 89 are constructed asymmetrically. From the large angle 93, which is 98.4 °, only an angle 91 of 30 ° with respect to the horizontal 95 extends upward. In the lower region 97, the distribution of the asymmetrical prisms is 60 ° and 90 °. The associated beam path is shown in FIG. 13. It can be seen that the middle region in Direction of the horizontal is completely debladed and practically no radiation in this angular range exits.

FIG. 14 shows a microprism plate 99 with asymmetrically constructed prisms. However, in contrast to the microprism plates according to FIGS. 10 to 13, these are directed inwards in the direction of the illuminant 101. In such an arrangement results in a course, as shown in Fig. 15. Again, there are areas 103 and 104 that are glare-free.

The connecting struts 18, 20, 22 and 24 are provided on their end sides, each with an opening 78 in the longitudinal direction. In these openings 78 corresponding projections 76 are inserted on the inside of the end portions 14 and 16. This is best seen in FIGS. 6 and 7.

The top cover rests on the case. For receiving the fluorescent lamp, the frames 66 are open at the top, as shown in Fig.2. The shape of the frames can be adapted to any cross-sectional shape. It is basically also changeable, which allows virtually any housing shapes.

FIG. 7 shows a first possibility of the modular construction. In the slot 46 of the end portion 14, a connecting part 50 is inserted with a projection 48 in the manner already described. The connecting part 50 has a bore 80, in which a tube 52 (s.Fig.1) is introduced. With the tube 52, the light is fixed to the ceiling.

In Fig.8 and Fig. 16-18 an alternative possibility of the modular design is shown. Instead of only one connecting part, two connecting parts 82 and 84 of two different lighting elements (not shown) are fastened to the same tube 52. For this purpose, the tube 52 is inserted into a two-part sleeve 86. The sleeve protrudes through holes 88 and 90 in the connecting parts 82 and 84. The connecting parts 82 and 84 each have two recesses 92 and 94, in which engage the thus projecting parts 96 and 98 of the other connecting part. This is shown in FIG.

The sleeve parts 104 and 106 of the sleeve 86 each have an opening 108 and 110, respectively (Fig.17, Fig.18). Below the opening 110 or above the opening 108, a pin 112 or 114 is provided. With this pin, each sleeve part 104 or 106 is fixed in its position relative to the connecting parts 82 and 84, respectively. The sleeve parts 104 and 106 are rotatable against each other. As a result, the opening 110 is always aligned in the direction of the connecting part 82. The opening 108 is always aligned in the direction of the connecting part 84. Both connecting parts are rotated against each other and the openings always remain aligned. Through the space provided in the tube 52, the sleeve 86 and the openings, the supply line for the lighting arrangement is placed. This is electrically connected to a three-part socket 116. The bushing 116 is shown in detail in FIG. The cover with the fluorescent tube has mating connectors 118. By simply plugging the cover so the electrical contact can be made. The sockets of the luminous means are provided in the cover, which is provided between two connecting struts. The socket is thus not arranged in the end parts.

In an arrangement in which the connecting part is not connected to further connecting parts, the supply line can be guided directly through the connecting part to the socket 116.

With the various connectors, linear, crossed and angled lamp assemblies can be created in a similar manner.

With the illustrated illumination arrangement, the desired illumination profiles can be generated. In particular, certain angular ranges can be blended and the light can be directed to other areas. For this purpose, the opening angle 100 of the microprisms 102 is variable over the height of the opening. The opening angles are chosen so that the angular range from which can be seen in the light is blinding. The radiation is directed so that it falls into other angular ranges.

The glass plates or the back of the profiled plate can be engraved with letters or screen-printed. The lighting arrangement is also suitable for attachment to the wall. Then the tubes 52 and possibly connecting parts are not required.

Claims (11)

A lighting arrangement (10) comprising a housing (12), a lamp (40) arranged in the housing, the radiation of which emerges from the housing through one or more housing openings (26, 28, 30) and means (72) for deblasting said radiation at least one housing opening (26, 28) is arranged laterally, characterized in that the housing cover is closed by a transparent cover (32, 72) which is profiled on the outside with a microstructure (102), the microstructure in turn having a transparent, smooth surface Cover (70) is provided, wherein the microstructure is designed blinding. Lighting arrangement according to claim 1, characterized in that the housing openings extend along the predominant part of the side areas and downwards, and the covers in one or more frame parts (18, 20, 22, 24) are arranged. Lighting arrangement according to claim 2, characterized in that the housing has a rectangular cross-section, of which both sides and the lower portion form housing openings, which are covered by flat plates with profiled surface (72). Lighting arrangement according to one of the preceding claims, characterized in that the covers (72) are made of pressed acrylic or glass. Lighting arrangement according to one of claims 1 to 3, characterized in that the covers (70, 72) consist of a fire-retardant plastic, in particular polycarbonate. Lighting arrangement according to one of the preceding claims, characterized in that the microstructures are microprisms (102). Lighting arrangement according to claim 3, characterized in that the plates for covering the lateral housing openings have a surface with a profile consisting of outwardly projecting prisms or linear fins, the opening angle (100) of the prisms or linear fins being above the height of the opening varied. Lighting arrangement according to one of the preceding claims, characterized in that the housing comprises two end parts (14, 16) which are connected to each other via frame parts (18, 20, 22, 24), wherein the frame parts by plane frames running parallel to the end parts (54) are additionally held in their position. Lighting arrangement according to claim 8, characterized in that the end part (14, 16) has an opening (46) into which connecting elements (50) can be latched. Lighting arrangement according to Claim 9, characterized in that the connecting elements (82, 84) can be connected to one another in an articulated manner and / or with fastening devices (52). Lighting arrangement according to one of the preceding claims, characterized in that a plurality of illuminants with different wavelength spectrum are provided and control means, by means of which the radiation intensities of the individual luminous means are adjustable.

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