EP3369988B1 - Method and illuminating device for illuminating walls - Google Patents

Description

The present invention relates to a method and a lighting device for illuminating wall surfaces such as goods or bookshelf walls, with at least one spotlight comprising a light source and a multi-axis curved, scallop-shaped reflector shell for capturing and emitting the light emitted by the associated light source in the form of a beam .

Such lighting devices are from US 2017/0023208 A1 and US 2013/201674 A1 known.

To illuminate upright wall surfaces such as goods or bookshelf walls or picture-hung museum or exhibition walls, spotlights can be used that direct the emitted light cone specifically onto the wall and, if necessary, onto the floor, in order to illuminate the corresponding pieces of wall surface. In this case, spotlights that are mounted at the upper end of a wall adjacent to this, for example on the ceiling, and illuminate the wall, are sometimes referred to as wallwashers. Spotlights that generally radiate downwards onto a floor surface are, however, sometimes referred to as downlights, whereby such spotlights can be integrated into ceiling panels, for example, or freely suspended and combined in matrix-like spotlight arrangements. Depending on the application however, a single spotlight can also be used, for example to illuminate a shop shelf, a shop display case or an individual object.

In particular, such spotlight arrangements can be used to illuminate long aisles such as shelves in supermarkets, but also as shop lighting, for example to illuminate showcases or as shelf lighting, kitchen lighting, aisle lighting, stairwell lighting or in conference rooms for blackboard or flipchart lighting. Furthermore, such radiator arrangements can also be built into electrical devices such as refrigerators and ovens, for example, in order to illuminate wall and / or floor surfaces of the devices.

For the illumination of long, narrow aisles, linear light arrangements are usually used, which extend along a longitudinal axis parallel to the aisle axis. In such linear lighting arrangements, however, there is usually a lack of brilliance. The products standing on a shelf do not appear individually sparkling, but rather a diffuse, contour-swallowing lighting is created.

If elongated light sources such as fluorescent tubes are not used, but point light sources such as LEDs are used, it makes sense not to use elongated reflectors like extruded profiles, but rather to use reflector shells that are individually assigned to the light sources, which are multi-axis curved and a larger part of the point light sources of this type Can capture emitted light in order to achieve more efficient illumination.

In particular, each light source or each group of light sources such as an LED cluster can be assigned a shell-shaped or half-shell-shaped reflector that captures the light and casts it in the form of a beam onto a specific area of the corridor. A respective light source, together with the reflector assigned to it, forms a radiator so that the linear Lighting device is formed from one or more rows of such spotlights. With such spotlights with several individual reflectors, however, it is not very easy to achieve uniform and glare-free illumination of narrow and narrow aisles, since the beam from a single spotlight usually only illuminates a partial area of such aisle.

In the case of long aisles in the form of shelves in supermarkets, an additional complication is that the aisle walls formed by the shelf walls are not smooth, bright surfaces that would have to be evenly illuminated at acute angles even with strong abrasive irradiation, but rather through the shelves standing on the shelves and often regrouped goods are unevenly shaped in the form of a constantly changing relief, are of different lightness or, depending on the goods label, are also dark. In addition, such shelf walls also have a certain depth, so that the lighting device should, if possible, also shine at least a little way into the shelves in order to also brighten up goods that are perhaps lower down on the shelf.

At the same time, not only should the goods on the shelves themselves be brilliantly illuminated, but also glare-free, but bright illumination in the aisle between the aisle walls and especially on the aisle floor and in the "shopping cart" should also be achieved for the visitor or customer. This implies mutually opposing requirements for the height of the lighting device above the floor, which both cannot be met at the same time. While a low arrangement of the lighting device would be advantageous for illuminating the depth of the shelves, glare-free for customers walking in the aisles is easier to achieve with a higher arrangement of the lighting device.

A linearly extending lighting device with an elongated housing is, for example, from the document DE 10 2005 007 347 A1 or the DE 20 2014 103 431 U1 known, this known lighting device having a plurality of rotatably mounted lighting units around the beam angle adapt and thus better meet different local conditions.

Proceeding from this, the present invention is based on the object of creating an improved lighting device of the type mentioned, which avoids the disadvantages of the prior art and further develops the latter in an advantageous manner. In particular, the aim is to achieve illumination that is as uniform as possible over the length of the corridor and that extends transversely to the longitudinal direction and that is as glare-free as possible. In addition, the lighting device should advantageously be easily adaptable to different configurations of the walls to be illuminated, for example by regrouping the presented goods.

According to the invention, the stated object is achieved by a lighting device according to claim 1 and a method according to claim 15. Preferred embodiments of the invention are the subject of the dependent claims.

It is therefore proposed that the radiator emit unreflected direct light as well as reflected indirect light and direct the different light components of the beam emitted by a radiator into different areas in order to have different light components in different spatial areas. The direct light, which is radiated unreflected past the reflector shell by a radiator, and the indirect light reflected by the reflector shell are radiated into different areas.

According to the invention, the reflector shells are each designed to irradiate a wall surface facing the respective reflector shell only with reflected indirect light, while an unreflected direct light portion of the beam is limited to an opposing wall surface from which the reflector shell faces away and / or to the floor. The reflected indirect light can in particular be used for shelf walls and the goods or books presented there evenly and softly without any glare, Nevertheless, they illuminate brilliantly, while a floor area or a wall area facing away can be brightly illuminated with the unreflected direct light, so that a customer or visitor walking there experiences an overall brightly illuminated corridor. At the same time, the beam is widened in the longitudinal direction parallel to the wall surface to be illuminated in order to allow a gentle overlay of the illuminated surface pieces, but at the same time limited in such a way that glare is prevented in the longitudinal direction. In a sectional plane that goes through the light source of the radiator perpendicular to its main direction of emission, the beam emitted by the radiator illuminates an area of at least 2 x 20 °, said beam being limited to 2 x 60 ° or less in said plane. For example, the bundle of rays can irradiate a region from 2 × 25 ° to a maximum of about 2 × 50 ° on the plane mentioned.

The said main emission direction thus forms the normal vector of the said longitudinal and / or sectional plane.

The main emission direction of the light source is directed at the reflector shell, the light source advantageously forming a point light source, for example in the form of an LED or a COB. "Point-shaped" is not to be understood in the mathematical sense, but rather in the light engineering sense means those light sources whose light rays seem to emanate from a point, unlike linear light sources such as fluorescent tubes.

In a further development of the invention, the light sources of the radiators can each be designed as half-space radiators and arranged in such a way that the respective light source radiates into a half-space facing away from the wall surface that is irradiated with indirect light by the reflector shell assigned to the said light source. The light source thus, so to speak, radiates in the "wrong", opposite direction away from the shelf wall or wall surface to be illuminated, so that only the indirect light reflected on the reflector shell is thrown back onto said shelf wall. That past the reflector shell In contrast, emitted, unreflected direct light does not fall on the wall surface mentioned, but only on the aisle floor and / or on an opposite wall surface, for example of an aisle.

In order to ensure that no unreflected direct light from the light sources falls on the wall surface to be illuminated with indirect light as intended, the light sources can each be arranged on a dimming strip that extends at least approximately upright in the direction of the longitudinal axis and, together with the reflector shell, can delimit a reflector interior, in where the said light source sits. The above-mentioned anti-glare strip thus screens the light source from the wall surface that is intended to be illuminated only with indirect light.

In order to illuminate the wall surfaces or shelf walls sufficiently brightly, the indirect light component of the beam of a spotlight can be significantly larger than the direct light component, for example the indirect light component is more than 75% or more than 90% and the direct light component is less than 25% or less than 10% of the entire bundle of rays of a radiator, whereby the direct light component is, however, greater than 1% or greater than 5%.

The reflector shells can advantageously each be designed as an approximately shell-shaped half-shell which partially captures the light emitted by the light source and throws it onto the wall surface to be illuminated. The bundle of rays emitted by the actively reflecting reflector surface of the reflector shell can be thrown completely onto the wall to be illuminated or, alternatively, partially onto the wall to be illuminated and partially onto the floor.

In order to achieve even illumination, for example, even long corridors without noticeable light-dark transitions, although the lighting device is subdivided or divided into several individual spotlights, which each illuminate only a portion of such an elongated corridor, is according to a further aspect of the present invention provided that the reflector shells each to are designed to illuminate an approximately rectangular area piece on the aisle wall facing the respective reflector shell, the lateral boundaries of which coincide at least approximately with the lateral boundaries of other surface pieces that are illuminated by other emitters. The multiple radiators can be attached to a common, elongated carrier which extends along a longitudinal axis with which the carrier can be aligned at least approximately parallel to the longitudinal direction of the wall surface or the corridor to be illuminated.

The bundles of rays emitted by the reflectors can be contoured in the manner of a pyramid with a rectangular plan in order to illuminate rectangular surface pieces on the aisle wall upright edges of the illuminated surface pieces coincide at least approximately or are very close to one another. In particular, there are no unlit areas left on the aisle wall and, conversely, light spots due to uneven cross-fading are also avoided.

In order to achieve a further equalization of the light intensities on the corridor areas to be illuminated, it can be provided in a further development of the invention that each area of the wall to be illuminated is irradiated by several radiators, the arrangement being such that each area along the wall to be illuminated is irradiated by the same Number of radiators is irradiated. By blending several spotlights while avoiding uneven blending, even light intensities can be achieved along the entire wall to be illuminated.

In particular, the reflector shells can be designed in such a way that the surface pieces illuminated by adjacent reflector shells overlap each other approximately in half and those of two reflector shells which are separated from one another by an intermediate reflector shell, Connect the illuminated patches to one another. As a result, each area of the wall to be illuminated is irradiated by exactly two spotlights.

In particular, the reflector shells can be contoured and arranged in such a way that a flat piece is irradiated on the wall surface facing the reflector shells, which in each case extends to the next reflector shell. In other words, a reflector shell irradiates a wall area that extends to the right to the right reflector shell neighbor and to the left to the left reflector shell neighbor.

The direct light portion that is not reflected past the reflector shells is limited to the floor of the aisle according to the method of the invention, the reflector shells being contoured in such a way that the unreflected direct light portion of the bundle of rays that is bounded by the edges of the reflector shell illuminates an area that has parallel borders to the longitudinal axis of the lighting device and / or extend parallel to the longitudinal axis of the aisle. The reflector shells are contoured and arranged in such a way that the direct light portion delimited by the edges of the reflector shell and / or the anti-glare strip irradiates an area, the edge of which extends along the angled transition between aisle floor and aisle wall. In this way, a light-dark edge can be concealed or hidden, which arises at the edge of the area piece illuminated by the direct light.

In order to achieve a certain level of illumination transversely to the longitudinal axis of the lighting device, also in depth, e.g. from shelves, but on the other hand not to have any glare effect on people in the illuminated area in the longitudinal direction, the lighting device can advantageously be at a height of about 3 m to 4 m or 3.2 m to 3.5 m above the ground, the axial spacing of the radiators from the aisle wall transversely to the longitudinal axis of the Lighting device can also be about 0.75 m to 4 m or 1 m to 3 m. Depending on the aisle geometry, other arrangements can also be advantageous, in an advantageous development of the invention the axial distance of the radiators from the aisle wall transversely to the longitudinal axis in the range from 25% to 200%, e.g. about 50% -100% of the installation height above the ground can correspond.

As an alternative or in addition, the lighting device can be arranged in such a way that the installation height of the radiators above the floor is approximately 150% to 250%, in particular approximately 200% of the height of the shelf wall to be illuminated. Alternatively or additionally, the spacing of the radiators in the longitudinal direction, that is to say parallel to the longitudinal axis of the lighting device, can be approximately 150% to 250%, in particular approximately 150% of the aisle width.

In a further development of the invention, the carrier with the radiators attached to it can be arranged above the aisle wall surface to be irradiated and at a distance from this aisle wall surface in such a way that a main radiation direction of the radiators directed downwards onto the aisle floor and / or the aisle wall irradiates the aisle wall at an acute angle and the floor surface is at least approximately irradiated from the front.

The reflector shells can advantageously be contoured in such a way that the indirect light reflected by the reflector shells is distributed on the aisle wall surface facing the reflector shells with a uniform light intensity distribution essentially over the entire height of the aisle wall.

In a further development of the invention, the reflector shells can each be contoured in such a shell-like, half-shell-like manner that a focal point defined by the reflector shell lies at least approximately in the center of the light source. In a further development of the invention, the approximately shell-shaped reflector shells can also be designed to work double-convergent and / or define at least one further focal point, which is in the area of the opening cross-section of the reflector shell or outside the reflector shell can lie. The reflected beam path emanating from the reflector shell can - roughly, roughly speaking - form a double pyramid or a double cone which initially tapers away from the reflector shell in order to widen again after passing the focal point or the constriction. The focal point does not have to be a point in the mathematical sense, but can be the narrowest point of an hourglass-like constriction at which the beam path still has a noticeable diameter.

According to the invention, the reflector shell can have a simple shell shape, which consists of an overall uniformly curved shell. Alternatively, according to the invention, the reflector shell can also be designed in the shape of a nutshell and composed of two half-shells, the reflector shell having a constriction in the transition area of the two shell halves mentioned, which is in the reflective inner side of the reflector shell in the form of a longitudinal rib that protrudes inward , can manifest.

In the case of such a constricted or nutshell-shaped or double-pear-shaped design of the reflector shell, each of the above-mentioned shell halves can be designed to work in the aforementioned manner in a double-convergent manner, so that the outgoing beam path reflected by one shell half has approximately the shape of a double pyramid or a double cone initially tapers starting from the shell half up to a constriction and then widened again afterwards.

In the case of such a twin shell or double pear shape of the overall clamshell reflector shell with a constriction between the shell halves, the shell halves can each be designed in such a way that the two emitted, reflected radiation cones or pyramids are superimposed on one another and essentially each in the area to be illuminated as intended completely irradiate the same area.

As a result of the double-convergent design of the reflector shell mentioned and the constriction created by this in the opening cross-section or outside the reflector shell, the radiators can also radiate through relatively small housing openings, compared to which the radiator optics are significantly larger. In this way, effective protection against glare and an attractive appearance can be achieved.

In a further development of the invention, the reflector shells can be contoured in such a way that the bundle of rays emitted by a reflector shell and / or from one shell half of a reflector shell in a vertical plane perpendicular to the longitudinal axis of the lighting device through the light source has a radiation angle of approximately 40 ° to 60 ° or approximately 50 °, said radiation angle range including a vertical to the ground.

When considering a vertical sectional plane through the light source parallel to the mentioned longitudinal axis of the lighting device, the reflector shell and / or each shell half can advantageously limit the radiation angle of the radiation beam to a range of 2x 20 ° to 2x 60 ° or 2x 25 ° to 2x50 ° to the vertical in order to To prevent glare in the longitudinal direction.

In order to achieve a further equalization of the radiation, to compensate for manufacturing and positioning tolerances of the light source and, if necessary, to achieve improved light color mixing with several different colored light sources, the deflecting optics can be faceted and / or microstructured on their reflective or totally reflective surfaces be. For example, microfacets can be provided, which can be designed in the form of flat flats, concave dents or convex pimples, with a plurality of such facets being provided on a light-technically active surface of the reflector, for example more than 25 or more than 50 or more than 100 such facets Facets in a multi-row and / or multi-column arrangement. Alternatively or additionally, other relief-like Microstructures such as geometrically regular relief contours such as truncated pyramids, conical elevations or depressions or similar structures can be provided.

The aforementioned faceting and / or microstructuring can be provided on one or all of the reflector surfaces of the reflector.

In an advantageous further development of the invention, the reflector is designed to be simply reflective, so that the light captured by the deflecting optics is only reflected once before it is radiated onto the surface piece on the wall or on the floor.

Fig. 1:

Eine perspektivische, schematische Darstellung der Beleuchtungsvorrichtung zum Beleuchten eines Gangs und der die Gangwände bildenden Regalwände nach einer vorteilhaften Ausführung der Erfindung,

Fig. 2:

Eine perspektivische Darstellung der Beleuchtungsvorrichtung aus Fig. 1, die die Anordnung von zwei Reihen von Reflektorschalen und diesen Reflektorschalen jeweils zugeordneten Lichtquellen zeigt und die Verkippbarkeit der Reflektorschalenreihen verdeutlicht,

Fig. 3:

Eine perspektivische Explosionsdarstellung eines Strahlers der Beleuchtungsvorrichtung aus den vorhergehenden Figuren umfassend eine Reflektorschale, eine Lichtquelle und einen Kühlkörper, an dem die Lichtquelle befestigt ist, wobei die Teilansicht (a) eine einfach muschelförmig gewölbte Reflektorschale und die Teilansicht (b) eine zwillingsmuschelförmige Reflektorschale mit einer Einschnürung, die die beiden Schalenhälften der Reflektorschale verbindet, in einer perspektivischen Explosionsansicht und einer montierten Ansicht zeigt,

Fig. 4:

Eine schematische Darstellung eines einzelnen Strahlers analog zu Fig. 3, wobei die Teilansicht (a) eine längsseitige Seitenansicht des Strahlers und dessen einfach muschelförmige Reflektorschale aus Fig. 3(a) und die Teilansicht (b) eine Draufsicht auf die Reflektorschale aus Fig. 3(a) quer zur Längsachse der Beleuchtungseinrichtung zeigt, wobei ferner die Teilansicht (c) eine längsseitige Seitenansicht des Strahlers aus Fig. 3(b) und dessen eingeschnürte, zwillingsmuschelförmige Reflektorschale und die Teilansicht (d) eine Draufsicht auf die eingeschnürte, zwillingsmuschelförmige Reflektorschale quer zur Längsachse der Beleuchtungseinrichtung zeigt,

Fig. 5:

Eine Draufsicht auf die Reflektorschalen mehrerer Strahler, die zu einer Reflektorschalengruppe zusammengefasst sind,

Fig. 6:

Eine Schnittansicht eines Strahlers in einer vertikalen Schnittebene durch die Lichtquelle senkrecht zur Längsachse der Beleuchtungseinrichtung, die das abgestrahlte Strahlenbündel und dessen Direktlicht- und Indirektlichtanteile quer zur Ganglängsrichtung zeigt,

Fig. 7.

Eine Längsschnittansicht in einer vertikalen Schnittebene parallel zur Längsachse der Beleuchtungsvorrichtung, die das pyramidenförmige Indirektlicht-Strahlenbündel und das davon ausgeleuchtete, rechteckige Flächenstück auf einer Gangwand zeigt,

Fig. 8:

Eine Querschnittsansicht ähnlich Fig. 6, die die Direktlicht- und die Indirektlichtanteile nach einer Ausführungsvariante zeigt, bei der mit dem Indirektlichtanteil zusätzlich zu den Regalwänden ein oberhalb der Regalwände befindliches Wandstück bestrahlt wird.

The invention is explained in more detail below on the basis of advantageous exemplary embodiments. In the drawings show:

Fig. 1:

A perspective, schematic representation of the lighting device for illuminating an aisle and the shelf walls forming the aisle walls according to an advantageous embodiment of the invention,

Fig. 2:

A perspective view of the lighting device from Fig. 1 , which shows the arrangement of two rows of reflector shells and light sources assigned to these reflector shells and illustrates the tiltability of the reflector shell rows,

Fig. 3:

A perspective exploded view of a spotlight of the lighting device from the preceding figures comprising a reflector shell, a light source and a heat sink to which the light source is attached, the partial view (a) being a simply scalloped reflector shell and the partial view (b) a twin shell-shaped reflector shell with a Constriction that the connects both shell halves of the reflector shell, shows in a perspective exploded view and an assembled view,

Fig. 4:

A schematic representation of a single radiator analogous to Fig. 3 , wherein the partial view (a) shows a longitudinal side view of the radiator and its simple clamshell reflector shell Fig. 3 (a) and the partial view (b) shows a plan view of the reflector shell Fig. 3 (a) shows transversely to the longitudinal axis of the lighting device, the partial view (c) also showing a longitudinal side view of the radiator Fig. 3 (b) and its constricted, twin-conch-shaped reflector shell and the partial view (d) shows a plan view of the constricted, twin-conch-shaped reflector shell transversely to the longitudinal axis of the lighting device,

Fig. 5:

A top view of the reflector shells of several emitters, which are combined to form a reflector shell group,

Fig. 6:

A sectional view of a radiator in a vertical sectional plane through the light source perpendicular to the longitudinal axis of the lighting device, which shows the emitted beam and its direct light and indirect light components transversely to the longitudinal direction of the aisle,

Fig. 7.

A longitudinal sectional view in a vertical sectional plane parallel to the longitudinal axis of the lighting device, which shows the pyramid-shaped indirect light beam and the rectangular area illuminated by it on an aisle wall,

Fig. 8:

A cross-sectional view similar Fig. 6 which shows the direct light and the indirect light components according to an embodiment variant in which a wall section located above the shelf walls is irradiated with the indirect light component in addition to the shelf walls.

As the figures show, the lighting device 1 comprises a plurality of spotlights 4, which can be arranged in one or two rows parallel to a longitudinal axis 3 of the lighting device 1. As Fig. 1 shows, the lighting device 1, viewed as a whole, has an elongated or elongated body which can comprise a carrier 2 which extends along the longitudinal axis 3 and to which the radiators 4 are attached.

As Fig. 1 shows, the lighting device 1 can be mounted and attached as intended in or above a corridor, the lighting device 1 preferably extending with its longitudinal axis 3 parallel to the longitudinal extent of the corridor. The radiators 4 can therefore in particular - at least approximately - be arranged in a common plane parallel to the floor, the rows in which the radiators 4 are arranged extending parallel to the aisle direction. The radiators 4 can be aligned obliquely downwards towards the floor on opposite sides of the aisle or have main radiation directions that are inclined towards different sides, but are basically directed very steeply downwards towards the floor of the aisle, as will be explained in more detail.

As Fig. 3 clarified, each emitter 4 comprises a light source 5, for example in the form of an LED, which can be designed, for example, as a COB unit, i.e. a chip on board unit, in which the actual LED element is arranged on a circuit board via which the LED can be supplied. LED clusters, for example in the form of a grid-shaped, possibly multicolored LED arrangement, can also be used as light sources.

Advantageously, the light sources 5 can each be designed as half-space radiators, which emit their light into a half-space.

Furthermore, each radiator 4 comprises a reflector shell 6, which - roughly speaking - can be designed as a shell-shaped half-shell and captures a large part of the light emitted by the assigned light source 5.

As Fig. 3 (a) shows, a respective reflector shell 6 can thereby form a simple, uniformly curved reflector shell. As the Fig. 3 (b) shows, a respective reflector shell 6 can, however, also be designed in the shape of a double or twin shell and thereby have a constriction 6e extending in the longitudinal direction, at which two shell halves 6a and 6b, which together form the reflector shell 6, are connected to one another. Said constriction 6e can in this case form an inwardly projecting, bulge-shaped or ridge-shaped ridge which forms the transition between the two shell halves.

The simple shell-shaped reflector shell 6 according to the execution Fig. 3 (a) can advantageously be designed in such a way that the reflected beam path emanating from the reflector shell initially tapers to a constriction and then widens again and thus forms an overall - approximately - double cone or a double pyramid, such a double cone or double pyramid also being at an angle Meaning of a crooked pyramid can be formed. At the in Fig. 3 (b) Each of the shell halves 6a and 6b can be designed in such a way that the reflected beam path emanating from each shell half initially tapers to a constriction in the aforementioned manner and then widens again starting from this and thus a total of two from the reflector shell Double-cone or double-pyramid-shaped beam paths go off, which, however, can advantageously be superimposed on one another, as has already been explained at the beginning.

As Fig. 3 furthermore shows, said reflector shell 6 can also have a light-technically inactive or non-reflective section, in particular in shape, beyond the active, reflective, shell-shaped reflector surface have a collar surrounding the active reflector shell, which can be used, for example, for assembly and / or for dimming or limiting the direct light component emitted by the light source.

As Fig. 5 clarified, several reflector shells 6 of several radiators 4 can be combined to form a reflector shell group, in particular in the form of an integrally one-piece reflector component which, viewed overall, has an elongated contour parallel to the longitudinal axis 3 of the lighting device 1, but the individual reflector shells 6 are multi-axially curved and extend individually transversely to the longitudinal axis 3.

As Fig. 3 shows, each radiator 4 also includes a shielding strip 11, which advantageously can simultaneously form a heat sink and partially closes the respective reflector shell 6. As the Figures 3 to 5 To illustrate, each reflector shell 6 can have a flat shell edge on which the above-mentioned anti-glare strip 11 sits in the form of the heat sink. The aforementioned light source 5 is advantageously seated on the inside on the aforementioned anti-glare strip 11 in the form of the heat sink, so that the light source 5 is arranged in a reflector interior that is delimited on the one hand by the reflector shell 6 and on the other hand by the anti-glare strip 11.

As Fig. 4 clarified, the reflector shell 6 extends beyond the anti-glare strip 11, wherein the anti-glare strip 11 can cover or close, for example, only an upper edge section of the reflector shell 6, cf. Fig. 4 (a) .

The light source 5 is arranged in such a way that the light source 5 radiates into the reflector shell 6. The main direction of emission 5H of the light source 5 goes away from the anti-glare strip 11, in particular away approximately perpendicularly, and strikes the reflector shell 6 which is inclined to it and which is contoured in such a way that it is viewed in a cross section, cf. Fig. 4 (a) , the emitted from the light source 5 Catches light over a radiation angle of approximately 120 ° to 170 °, in particular approximately 140 ° to 150 °, and re-emits it in a reflected manner.

Taking into account that the light source 5 - possibly with the help of the anti-glare strip 11 - radiates into a total radiation space of about 180 °, the reflector shell 6 captures about two thirds to four fifths, in particular about three quarters of the emitted light.

The direct light component not captured by the reflector shell 6 and thus not reflected can thus assume a radiation angle of about 20 ° to 60 °, in particular about 30 ° to 40 °, this direct light component being directed more or less vertically downwards, but slightly to the side inclined towards from which the reflector shell 6 faces away.

As Fig. 4 (b) shows, the beam 7 emitted by the radiator 4 is viewed in the longitudinal direction at a radiation angle of approximately 2x 40 ° to 2x 60 °, in particular approximately 2x 50 ° symmetrically to the vertical and / or in a longitudinal and / or sectional plane V through the light source 5 limited perpendicular to their main emission direction 5H in order to avoid glare in the longitudinal direction, see also Fig. 7 .

As Fig. 2 illustrated, the reflector shells 6 face one of the two aisle walls 8 or 9 with their active, reflective surface, so that the reflector shells 6 cast reflected indirect light onto the respective aisle wall 8 or 9. The light source 5 is turned away from this aisle wall, which is irradiated with indirect light from the reflector shell, and is thus arranged the wrong way round, so to speak. If the light source 5 radiates with its main direction of radiation, for example to the right, the associated reflector 6 throws the reflected light to the left onto the aisle wall located there.

In Fig. 6 the beam 7 emitted by a radiator 4 is shown in more detail. As can be seen there, includes that emitted by a radiator 4 Beam 7 on the one hand an indirect light component 7i, which means the light reflected by the reflector 6, and a direct light component 7d, which means the unreflected light radiated past the reflector shell 6. The radiator 4 and its reflector shell 6 are designed in such a way that the aisle or shelf wall 8 facing the reflector shell 6 is only irradiated by indirect light, while the direct light component is limited to the aisle floor or an opposite aisle wall. In particular, the direct light component can only fall on the floor 10 of the aisle.

The aforementioned indirect light component 7i again comprises two sub-components, namely on the one hand the indirect light component 7ir that falls on the aisle wall 8 facing the reflector shell 6 or the shelf positioned there, and the indirect light component 7ib that falls on the floor 10 of the aisle.

The reflector shell 6 can advantageously be contoured in such a way that the direct light component 7d radiated onto the aisle floor 10 irradiates a surface area whose boundary runs at least approximately in the angled transition area between aisle floor 10 and aisle wall 9 in order to conceal or hide the resulting light-dark edge make it less visible.

If you take into account the in Fig. 2 Shown design of the lighting device 1 comprising two rows of spotlights 4, the direct light portion 7d of the beam 7 with its other - in Fig. 6 left edge - be limited approximately vertically in the middle under the lighting device, so that the direct light components of the two rows of spotlights 4 complement each other and illuminate the entire aisle floor 10.

The two rows of spotlights 4, however, illuminate the opposite aisle walls 8 and 9 each with only the indirect light component 7i of the respective bundle of rays 7.

Claims (15)

1. Illumination device for illuminating wall surfaces such as goods-shelf walls or bookshelf walls, comprising at least one spotlight (4), which has a punctiform light source (5) and a shell-shaped reflector shell (6), curved on multiple axes, for catching and radiating the light output by the light source (5) in the form of a beam pencil (7), wherein the light source (5) has a main radiation direction (5H) directed towards the reflector shell (6), wherein the reflector shell (6) is designed to irradiate the wall surface (8) facing the relevant reflector shell (6) only with reflected indirect light, and a non-reflected direct-light portion of the beam pencil (7) is restricted to an opposite wall surface (9) from which the reflector shell (6) faces away, and/or is restricted to the aisle floor (10), wherein the beam pencil (7) irradiates a range of at least 2 x 20° and is limited to a range of at most 2 x 60° in a sectional plane (V) which extends through the light source (5) perpendicularly to the main radiation direction (5H),
   characterised in that
   the shell-shaped half shell forming the reflector shell (6)

   - forms a single shell that is harmonically curved as a whole, or

   - comprises a constricted portion (6e) and has two shell halves (6a, 6b) which are interconnected in the region of the constricted portion (6e) and together form a twin-shell-shaped half shell.
2. Illumination device according to the preceding claim, wherein the light source (5) of the spotlight (4) is designed as a half-space spotlight and is arranged such that the light source (5) radiates into a half space, which is delimited by said sectional plane (V) and faces away from the wall surface (8) irradiated with indirect light by the reflector shell (6) associated with the light source (5).
3. Illumination device according to any of the preceding claims, wherein said sectional plane (V) is irradiated with the reflected indirect light and/or at least approximately coincides with a boundary of the non-reflected direct-light portion.
4. Illumination device according to the preceding claim, wherein the light source (5) is arranged on a screening strip (11), which extends in an upright manner in the direction of the longitudinal axis (3) and, together with the reflector shell (6), delimits an interior reflector space (12) in which the light source (5) is positioned, wherein the screening strip (11) delimits or forms a cooling body and/or a light-source holder.
5. Illumination device according to any of the preceding claims, wherein the shell-shaped half shell or each of the shell halves of the half shell are designed to operate in a double-convergent manner and/or are contoured such that a reflected beam path exiting from the half shell or each shell half of the half shell first tapers to form a constricted portion and widens again from the constricted portion, in the manner of a double cone or a double pyramid.
6. Illumination device according to any of the preceding claims, wherein a plurality of spotlights (4) are distributed along a longitudinal axis (3), wherein the spotlights (4) each have a punctiform light source (5) and their own shell-shaped reflector shell (6), each curved on multiple axes, for catching and radiating the light output by the light source (5) in the form of a beam pencil (7), wherein the reflector shells (6) are each designed to illuminate an approximately rectangular surface portion (8c) on the wall surface (8) facing the relevant reflector shell (6).
7. Illumination device according to the preceding claim, wherein the beam pencils (7) each illuminate a range of at least 2 x 20° and are limited to at most 2 x 60° in a sectional plane (V) which extends through the light source (5) of the relevant spotlight perpendicularly to the relevant main radiation direction, wherein each beam pencil irradiates the wall surface facing the relevant reflector shell (6) only with reflected indirect light, and a non-reflected direct-light portion of the beam pencil (7) is restricted to an opposite wall surface (9) facing away from the reflector shell (6), and/or is restricted to the aisle floor (10).
8. Illumination device according to any of the two preceding claims, wherein the reflector shells (6) are designed such that the surface portions (8a, 8b; 8b, 8c; 8c, 8d) illuminated by adjacent reflector shells (6) overlap half of one another and the surface portions illuminated by two reflector shells (6) that are separated from one another by a reflector shell (6) positioned therebetween adjoin one another.
9. Illumination device according to any of the preceding claims, wherein the reflector shells (6) are each contoured such that the non-reflected direct-light portion of the beam pencil (7) delimited by the edges of the reflector shell (6) is restricted to the aisle floor and an edge of the surface portion irradiated with the direct-light portion extends along the angular transition between the aisle floor and the wall surface.
10. Illumination device according to any of the preceding claims, wherein the at least one spotlight (4) is provided to be arranged above the wall surface to be irradiated and so as to be spaced apart from this wall surface (8) such that a main radiation direction directed downwards towards the floor (10) and/or the wall surface (8) irradiates the wall surface (8) obliquely at an acute angle and the floor surface (3) is at least approximately frontally irradiated, wherein the at least one reflector shell (6) is designed to distribute the indirect light reflected by the reflector shell (6) onto the wall surface (8) facing the reflector shell (6), substantially over the entire height of the wall surface, with a uniform illuminance distribution in the range of from 1:10 to 1:2 or 1:6 to 1:4.
11. Illumination device according to any of the preceding claims, wherein the reflector shells (6) are each designed to be singly reflective and all of the light output by a light source (5) and caught by the associated reflector shell (6) is reflected a maximum of once.
12. Illumination device according to any of the preceding claims, wherein the photometrically active surface of the at least one reflector shell (6) is provided with faceting and/or micro-structuring.
13. Illumination device according to claim 6 or any of the claims dependent thereon, wherein the plurality of reflector shells (6) are arranged in at least one row, wherein the reflector shells arranged in one row are mounted on the carrier (2) so as to be tilted about a common pivot axis (13, 14) extending in parallel with the longitudinal axis (3), wherein the reflector shells (6) in one row are fastened to a common tilting carrier part and are able to be tilted together by means of said part.
14. Illumination device according to claim 6 or any of the claims dependent thereon, wherein the reflector shells (6) are arranged in two rows in parallel with the longitudinal axis (3), the reflector shells (6) in one row and the reflector shells (6) in the other row face opposite wall surfaces (8, 9), wherein each of the rows of reflector shells (6) are mounted on the carrier (2) so as to be pivotable about a pivot axis (13, 14) in parallel with the longitudinal axis (3), wherein the two rows of reflector shells (6) can be pivoted independently of one another.
15. Method for illuminating a wall surface such as a goods-shelf wall or bookshelf wall by means of an illumination device, which comprises at least one spotlight (4), which has a punctiform light source (5) and a shell-shaped reflector shell (6), curved on multiple axes, for catching and radiating the light output by the light source, wherein the light source (5) has a main radiation direction directed towards the reflector shell (6) and from the at least one spotlight (4) a beam pencil is radiated, which has a non-reflected direct-light portion that is radiated past the reflector shell and a singly reflected indirect-light portion, wherein the beam pencil irradiates a range of at least 2 x 20° and is limited to a range of at most 2 x 60° in a sectional plane which extends through the light source perpendicularly to the main radiation direction, wherein the wall surface (8) facing the reflector shell (6) of the spotlight (4) only is irradiated with said singly reflected indirect-light portion and only an aisle floor (10) is irradiated with the non-reflected direct-light portion, characterised in that the non-reflected direct-light portion of the beam pencil (7) delimited by the edges of the reflector shell (6) is restricted to the aisle floor such that an edge of the surface portion irradiated with the direct-light portion extends along the angular transition between the aisle floor and the wall surface.

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