EP1843082B1 - Downlighter in particular for use in a corridor - Google Patents

Abstract

The light (1) has an illuminant (2a,2b) and a deflecting medium (10) to deflect the light emitted by the illuminant. The deflecting medium is formed such that an illuminating angle range is extended in horizontal direction away from the light with provided installed light, and another lighting angle range extends downward. The two lighting angle range are separated from each other by an area with smaller lighting intensity. An area with smaller lighting intensity lies in between the primary lateral and secondary perpendicular radiation.

Description

The invention relates to a lamp, a lighting system and the use of a lamp according to the features of the preamble of the independent claims.

In order to achieve a light emission in the desired manner in lights, a variety of different reflectors and refractors are known. For example, are off DE 103 38 378 translucent components with prisms known, which is used for the selective division of light, for example, from lights. Out EP 1 586 818 a luminaire is known in which two prism covers are used to redirect the light. Out DE 195 47 747 is a luminaire with direct and indirect light propagation known. This is intended to generate a direct and indirect lighting proportion. In this case, strip-like prisms can be used. Prismatic structures for the purpose of light deflection are also off DE 199 23 226 . DE GM 20 2004 009 029 or DE 203 14 606 known.

However, all these lights are subject to certain disadvantages. In particular, many of the lights are not suitable for use in a hallway.

Out DE GM 89 15 821 is also a luminaire with a cover with a prismatic structure known, with which a zone of reduced luminance is to be created. This should be effected when using the lamp as a ceiling light directly below the light a zone of relative darkness. The main luminous flux should be emitted laterally and impinge on the corridor walls.

A problem with this solution is that viewers who step out of side doors into the hall are blinded by the emitted light.

Out US-A-3 647 148 a ceiling light is known which generates illumination angle ranges with different intensities.

It is therefore an object of the present invention to provide a luminaire and a lighting system which can be optimally used in a long corridor, for example in hospitals. The luminaire is intended to enable illumination which is not dazzling to the viewer. A further object of the invention is to provide a lighting system which is versatile applicable and by means of which, for example in hospitals in a cost effective manner in addition to room lighting further lighting applications can be provided. Another object of the invention is also to provide a lighting system by means of which different lighting needs can be met in a simple manner. These and other objects are achieved according to the invention with a lamp and a lighting system with the features of the characterizing part of the independent claims.

The luminaire according to the invention is provided with at least one luminous means and deflection means for deflecting the light emitted by the luminous means. The deflecting means are designed in such a way that, when the luminaire is mounted as intended, a first illumination angle range extends approximately horizontally away from the luminaire and a second illumination angle range extends approximately perpendicularly downwards, and the first and second illumination angle ranges pass through an area with less Lighting intensity are separated from each other.

The inventive lamp is therefore particularly suitable for use in a hallway. Due to the primary lateral and secondary perpendicular radiation and due to the intervening area with lower illumination intensity, there is no risk that persons passing through a door into the corridor will be blinded by the luminaire mounted along the corridor.

The lamp is designed as an elongated lamp, which is also provided with an elongated lamp. Such a lamp is particularly well suited for uniform illumination of a long corridor. Typically, a plurality of such lights may be sequentially arranged along the corridor.

The intensity of the illumination in the first illumination angle range is greater than in the second illumination angle range. Primarily, therefore, the illumination of the corridor takes place indirectly over the side wall of the corridor. With a secondary, lower proportion of light is also a direct illumination of the room. It is particularly advantageous if the lamp is also provided with means for preventing a precisely vertical or vertical light emission. In this way it can be prevented that a person moving along the corridor is blinded by the light emitted downwards.

Preferably, the first illumination angle range extends over an angle of about 75 ° to about 150 ° to the vertical. The second angle range preferably extends from about 25 ° to about 60 ° with respect to the perpendicular. Due to the provided between 60 and 75 ° with respect to the vertical area with lower illumination intensity is caused by a ceiling mounting the lamp in a corridor with conventional dimensions that the Face of a passing from a side door in the corridor person is in the range of lower intensity. Of course, depending on the field of application, the corresponding angular range can be adapted so that even with other dimensions of a corridor an aperture is prevented.

The luminaire has a symmetrical design, so that light is emitted on both sides in the direction of the side walls of the corridor when the lamp is mounted along a corridor. Therefore, two first and two second illumination angle ranges are provided on both sides in the manner described above.

The deflection means may be formed by a cover with a prismatic structure. However, alternative solutions are conceivable by means of which the same effects could be achieved, for example elements with a microcone structure.

Preferably, the cover has a plurality of mutually parallel prisms. The prisms are preferably arranged on the inside of the cover, so that when viewed from the outside results in a smooth surface.

In this case, the prisms are particularly preferably arranged at regular intervals from each other, and they have an equal width of their base surfaces. This results from the outside a uniform arrangement of the prisms. Nevertheless, the desired deflection of the light can be achieved by different choice of the height or the position of the tip of the individual prisms.

Depending on the application, for example, even when using multiple bulbs, a range without prisms may be desired or necessary. According to a further preferred embodiment In this case, lines are provided in this area whose positions correspond to the side lines of the base surfaces of the missing or the missing prism. In this way, the overall impression of the luminaire according to the invention is not changed from the outside.

In the luminaire according to the invention, two bulbs arranged one above the other in the installed position are provided. In this case, an identical prism structure is preferably provided for each light source. In particular, the use of two bulbs also allows the use of bulbs with different emission spectra, which can be weighted according to need, for example, depending on the time of day, correspondingly stronger or less strong. This makes it possible to achieve a variable emission spectrum over time with suitable control.

Particularly preferably, the deflection means are designed in the form of a profile extruded as a panel. Such deflection means can be produced particularly inexpensively.

Depending on the application, the base part can be of different lengths. Essential here are certain common components such as the cross section or dimensions of the base part.

According to a further aspect of the invention, a luminaire system is provided in which an interface is provided in at least one of its ends in the longitudinal direction in a luminaire as described above. The lighting system has at least one additional module which can be connected to the interface. For example, while using it of lights for corridor lighting individual spot modules are arranged, which allow individual lighting of individual areas, such as images on a wall.

Yet another aspect of the invention relates to the use of a lamp as described above with Umlenkanordnungen in a long drawn room, especially in a hallway, wherein the lamp is used such that in a first illumination angle range light on a wall above a predetermined height, in particular above 2.00 meters is emitted and that in a second illumination angle range light is given directly into the room.

Various advantages are achieved with the luminaire according to the invention. Glare and reflections are reduced. Due to the indirect lighting via walls and partly direct lighting results in a low shadowing. The indirect illumination of the side walls of a corridor results in an optical broadening. Because the luminaire according to the invention can be mounted directly on the ceiling, it is also ideally suited for low room heights.

Figur 1

eine perspektivische Darstellung einer erfindungsgemässen Leuchte,

Figur 2

einen Schnitt durch die Leuchte gemäss Figur 1 in einer Ebene senkrecht zur Längsrichtung L,

Figur 3

eine Darstellung der Lichtverteilung der erfindungsgemässen Leuchte,

Figur 4a

einen Querschnitt durch eine Abdeckung der erfindungsgemässen Leuchte,

Figur 4b

vergrösserter Ausschnitt A aus Figur 4a und

Figur 5

eine schematische Darstellung einer in einem Flur montierten erfindungsgemässen Leuchte.

The invention is explained in more detail below in exemplary embodiments and with reference to the drawings. Show it:

FIG. 1

a perspective view of an inventive lamp,

FIG. 2

a section through the lamp according to FIG. 1 in a plane perpendicular to the longitudinal direction L,

FIG. 3

a representation of the light distribution of the inventive lamp,

FIG. 4a

a cross section through a cover of the inventive lamp,

FIG. 4b

enlarged detail A out FIG. 4a and

FIG. 5

a schematic representation of a mounted in a hallway inventive lamp.

FIG. 1 shows a perspective view of a lamp according to the invention 1. The inventive lamp 1 is formed substantially as an elongated cuboid. The lamp 1 should be mounted with one of its narrow sides 6 on a ceiling. The lamp 1 has a base part 3, which is mounted or mounted on the ceiling. The base part 3 has not shown mounting means for mounting the lamp to the ceiling D. By the base part 3, the mounting position of the lamp 1 is defined based on the ceiling. At the base part 3 is a holder for two bulbs 2a, 2b, typically fluorescent tubes, is provided. The lighting means 2a, 2b are covered by a transparent cover 10, which causes a deflection of the light in the manner described below. On the lower side in the mounting position 20, a cover is also provided, which prevents direct radiation of the light in the vertical direction V down.

The luminaire 1 is typically mounted in the longitudinal direction L along a corridor. The lower cover 20 thus prevents glare from moving along the corridor persons.

In FIG. 2 is a section through the lamp according to FIG. 1 shown in a plane perpendicular to the longitudinal direction L. The lamp 1 is mounted with the base part 3 on the ceiling D. The bulbs 2a, 2b are arranged one above the other in the vertical direction. The cover 10, which serves as a deflection means for the light is integrally formed. The lighting means 2a, 2b are covered on three sides by the cover 10. On the inside of the cover 10, a prism structure 11 is arranged, which causes the deflection of the light in the desired manner. At the lower surface in the mounting position of the cover 10, an additional lower prism structure 21 is provided. The prism structure 21 prevents direct emission of light in the vertical direction V by refraction of light. In addition to the prism structure 21 or alternatively, a lower cover 20 can also be provided which completely prevents vertical light emission.

The emission characteristics of the luminaire according to FIG. 2 is in FIG. 3 shown. The prism structure 11 is formed such that light in the first illumination angle ranges B1 is emitted approximately horizontally from the luminaire 1 on both sides. The illumination angle ranges B1 extend with respect to the vertical V over an angular range of about 75 to about 120 °. In a second illumination angle range B2 light is also emitted, but at a lower intensity. The second illumination angle range B2 extends over a range of 40 to 60 ° relative to the vertical.

The intensities in the first and in the second illumination angle range B1, B2 can be selected depending on the field of application. Typically, the intensity may be distributed such that 80% of the radiated light is emitted in the first illumination angle range B1, resulting in indirect illumination, and that 20% of the intensity is delivered as direct illumination in the second illumination angle range B2.

The two illumination angle ranges B1, B2 are each separated by a region G with a lower light intensity. The lower intensity region G typically extends from about 60 to 75 degrees with respect to the vertical V.

In FIG. 4a a cross-section through the cover 10 is shown. The cover 10 is extruded as a profile of a transparent material, for example of polycarbonate or polymethyl methacrylate (Plexiglas, PMMA). A prism structure 11 in the form of a plurality of juxtaposed prisms 12 is arranged on the inside of the profile. So that a uniform structure can be seen from the outside, the prisms have a base 13 (see enlarged illustration in FIG FIG. 4b ), which for each individual prism 12 has an equal width B, typically 3mm. However, the individual prisms 12 differ in their shape and in their height h. As a result, the desired light distribution can be achieved. A different shape means different angles of the prisms.

Based on the base 13, the tips of the individual prisms are arranged differently, resulting in different angles α1, α2, α3 of the individual prism tips. In addition, a constant thickness D of the cover 10, i. a constant thickness between the one side of the cover 10 and the tips S of the prisms, provided. However, the height h of the individual prisms varies. By carefully selecting the height and / or the angle of the individual prisms, the desired light distribution can be achieved.

In areas 17a, 17b, an identical prism structure is provided for each of the lighting means. In each area relatively flat prisms are provided in the middle. The height of the prisms increases in both directions towards the edge of the areas. The cover 10 is also formed symmetrically with respect to a central longitudinal plane E. This results in identical emission characteristics on both sides of the luminous means 2a, 2b.

In the prism structure also small areas 14 are provided without prisms. In this area lines are introduced instead of baselines of the prisms, which are visible from the outside. The absence of a prism is therefore not noticed by the viewer.

The cover 10 is also provided at its lower edge 18 with a groove 15. In the groove 15, a cover 20 (see, for example FIGS. 1 or 2 ) are snapped. At the in FIG. 4a upper boundary of the cover 10, a flange-like connection 16 for fixing the cover 10 is arranged.

In FIG. 5 is shown in perspective a mounted in a hallway inventive lamp 1. The lamp 1 is mounted directly on the ceiling D and extends in the longitudinal direction L along the corridor. The illumination angle ranges B1 are selected such that the side walls W are illuminated above a horizontal separation line H in an illumination area B. Below the dividing line H is the area with G with lower light intensity. A person P, the side, for example, from a door T enters the hall, is therefore not dazzled by the light. At the same time, the corridor is also illuminated directly by the second illumination angle range B2, but at a lower intensity.

In FIG. 5 is also shown schematically an additional module 30. The additional module 30 is connected at one end 4 of the lamp via an interface, not shown, with the lamp 1. The additional module 30 in FIG. 5 is designed as a spot module. With the Spot module 30, it is possible to selectively illuminate a selected area of the wall with a light cone K Spot. For example, it can be used to illuminate wall areas with an image.

Claims (13)

1. Luminaire (1) which is designed as an elongated luminaire having elongated luminous means (2a, 2b) and having deflecting means (10) for deflecting the light emitted by the luminous means (2a, 2b), the luminaire being symmetrically designed with reference to a plane of symmetry (E), characterized in that the deflecting means are designed in such a way that when a luminaire (1) is duly mounted on a ceiling, light is emitted into respectively a first angular illumination region (B1) approximately in a horizontal direction and away from the luminaire on both sides, and in that light is emitted downwards respectively in a second angular illumination region (B2), the first and the second angular illumination regions (B1, B2) being separated from one another by a region (G) of lesser illumination intensity, and the illumination intensity in the second angular illumination region (B2) being less than in the first angular illumination region (B1), and in that the luminaire has two luminous means lying one above another in the mounted position.
2. Luminaire according to Claim 1, characterized in that the luminaire (1) is provided with means (20, 21) for preventing a precisely vertical radiation.
3. Luminaire according to either of Claims 1 and 2, characterized in that the first angular illumination region (B1) extends over an angle of from approximately 75° to approximately 105° referred to the vertical (V), and in that the second angular illumination region (B2) extends over an angle of from approximately 25° to approximately 60° referred to the vertical (V).
4. Luminaire according to one of Claims 1 to 3, characterized in that the deflecting means (10) are designed in such a way that in the case of a duly mounted luminaire a wall (W) illuminated by the angular illumination region (B1) can be illuminated above a dividing line (H) at a predeterminable level.
5. Luminaire according to one of Claims 1 to 4, characterized in that the deflecting means are formed by a cover (10) having a prismatic structure (11).
6. Luminaire according to Claim 5, characterized in that the cover (10) has a plurality of prisms (12) running parallel to one another.
7. Luminaire according to Claim 6, characterized in that the prisms (12) have equally wide base surfaces (13).
8. Luminaire according to either of Claims 6 and 7, characterized in that a region (14) without prisms is provided, and in that there are provided in this region (14) lines which are visible from the outside and which correspond to the side lines of the base surfaces (13) of a missing prism.
9. Luminaire according to one of Claims 1 to 8, characterized in that an identical prismatic structure (11) is provided for each luminous means (2a, 2b).
10. Luminaire according to one of Claims 1 to 9, characterized in that the deflecting means (10) are designed as an extruded profile.
11. Luminaire according to one of Claims 1 to 10, characterized in that two luminous means (2a, 2b) having a different emission spectrum are provided.
12. Luminaire system having a luminaire according to one of Claims 1 to 11, which is provided with an interface (5) at at least one of its ends (4) seen in a longitudinal direction (L), the luminaire system having at least one additional module (30) which can be connected to the interface (5).
13. Use of a luminaire according to one of Claims 1 to 11, in an elongated space, in particular in a corridor, the first angular illumination region (B1) illuminating a wall (W) above a predetermined level (H), and the second angular illumination region (B2) illuminating the corridor directly beneath.

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