EP3239602A1 - Light installation - Google Patents

Abstract

The present application relates to a lighting installation (1) comprising - At least one light source (2) for the delivery of diffused light and at least two perforated surface elements (3), wherein the surface elements (3) relative to the light source (1) are arranged one behind the other, so that the light first from the light source (1) first meets a first surface element (3, 12) and only then at least one further surface element (3, 13) wherein the surface elements (3) each have a plurality of perforations, which are regularly distributed over a surface of the surface element (3), wherein at least a part of at least one of the surface elements (3) relative to at least one further surface element (3) is movable such that a covering of at least part of the perforations of the surface elements (3) arranged one behind the other relative to the light source (1) can be changed. In order to create a luminous installation that produces a visually appealing light impression, wherein a change of the visual impression should be made possible with the simplest possible means, it is proposed according to the invention that at least one of the surface elements (3) is designed to be dimensionally unstable.

Description

introduction

• mindestens eine Lichtquelle zur Spendung von diffusem Licht und
• mindestens zwei perforierte Flächenelemente,

wobei die Flächenelemente relativ zu der Lichtquelle betrachtet hintereinander angeordnet sind, sodass das Licht ausgehend von der Lichtquelle zuerst ein erstes Flächenelement und erst anschließend zumindest ein weiteres Flächenelement trifft, wobei die Flächenelemente jeweils eine Vielzahl von Perforationen aufweisen, die regelmäßig verteilt über eine Fläche des Flächenelements ausgebildet sind, wobei zumindest ein Teil mindestens eines der Flächenelemente relativ zu mindestens einem weiteren Flächenelement bewegbar ist, sodass eine relativ zu der Lichtquelle betrachtete Überdeckung mindestens eines Teils der Perforationen der hintereinander angeordneten Flächenelemente änderbar ist.The present application relates to a lighting installation comprising

• at least one light source for the delivery of diffused light and
• at least two perforated surface elements,

wherein the surface elements are arranged one behind the other relative to the light source so that the light strikes first from the light source first surface element and then at least one further surface element, the surface elements each having a plurality of perforations regularly distributed over a surface of the surface element are formed, wherein at least a part of at least one of the surface elements is movable relative to at least one further surface element, so that a respect to the light source considered coverage of at least a portion of the perforations of the successively arranged surface elements is changeable.

1. a) Mindestens zwei perforierte Flächenelemente werden mittels einer diffusen Lichtquelle angestrahlt, wobei das von der Lichtquelle ausgehende Licht zuerst auf ein erstes Flächenelement und erst anschließend zumindest ein weiteres Flächenelement trifft.
2. b) Mindestens zwei Flächenelemente werden relativ zueinander bewegt, sodass sich ein optischer Eindruck eines Durchtritts des Lichts durch die Flächenelemente von einer der Lichtquelle abgewandten Seite der Flächenelemente aus betrachtet ändert.

Furthermore, the present application relates to a method for changing a lighting configuration of a lighting installation, comprising the following method step:

1. a) At least two perforated surface elements are illuminated by means of a diffuse light source, wherein the light emanating from the light source first strikes a first surface element and only then subsequently at least one further surface element.
2. b) At least two surface elements are moved relative to one another, so that an optical impression of a passage of the light through the surface elements changes from a side of the surface elements facing away from the light source.

A light source typically comprises at least one light source suitable for generating light. This is typically a light bulb or an LED. For the purposes of the present application, "diffuse light" is understood to mean a type of light that has no dominant radiation direction. In such diffused light, objects do not cast clear shadows, and contrasts between illuminated and shaded areas are comparatively small. Instead, the shadows of objects illuminated with diffused light blurred edges. Examples of diffused light are daylight in an overcast sky, light reflected from matte white surfaces or artificial light from a variety of different lighting sources, such as those often used in banks, department stores and the like.

Another example of a light source that emits diffused light is a so-called "surface light" in which there is currently not a single point light source, but rather light is radiated from one surface. Such a surface light can be formed, for example, in the form of a backlit with a plurality of individual lamps diffuser. In particular, surface lights are known in which a plurality of grid-shaped LEDs arranged behind a flat diffuser, such as a frosted glass or Plexiglas, is arranged. The diffuser assumes the function of "smearing" the light emanating from the individual light sources and thus producing a flat luminous impression.

The opposite of diffused light is so-called "directed light". This term refers to light with a clear preferred direction of the light rays, ie light that radiates in a certain preferred direction. Directed light beams are therefore broad, though not necessarily complete, in parallel. In directed light, objects cast dark shadows with sharp edges. Examples of directed light are solar radiation, laser radiation or the slightly divergent radiation of a spot lamp.

For the purposes of the present application, a "perforated surface element" is understood to be a planar element which has a plurality of individual perforations or "passages". As a planar element, the surface element is characterized in that its thickness is significantly less than the other dimensions. In particular, it is conceivable that a surface element in its dimensions height and width 1.50 m x 1.20 m, while the thickness of the surface element is only a few millimeters.

In the context of the surface elements, "perforations" are to a certain extent understood to mean breakthroughs which allow unimpeded passage of light from one side of the surface element to the respectively opposite side. Perforations of this kind can, for example, each be square in design and have an edge length in the range of a few millimeters. In particular, such perforations can be arranged in a grid-shaped and evenly distributed over the surface element. Perforations are not mandatory to subsequently introduced breakthroughs in a respective surface element. Instead, such perforations may also be present in a surface element by nature.

The arrangement of the surface elements relative to the light source one behind the other results in the surface elements overlapping, so that a viewer of the surface elements of a side facing away from the light source can only perceive light that radiates through the perforations of the surface elements connected in series. It goes without saying that the less light arrives on the side of the surface elements facing away from the light source, the more surface elements are brought into coincidence one behind the other. The coverage of the surface elements takes place in such a way that sets for a viewer of the lighting installation with a view from a side facing away from the light source on the surface elements of the moire effect.

The "mobility" of the perforated surface elements relative to each other offers the possibility that the overlap of the individual perforations is mutually changeable. According to the above explanation of the moiré effect, it results from this change of the coverage that an optically-resultant, superordinate pattern of the light shining through the area elements similarly changes. In other words, the mobility of the surface elements relative to one another means that the possibility is created of changing the overall visual impression produced by the light installation. Ideally, the surface elements are movable relative to each other in such a way that the overlapping of all perforations of the surface elements change. A Perforationsanteil of at least one surface element, preferably all surface elements, is preferably in a range between 10% and 50%, more preferably between 20% and 40%.

For the realization of the described effect, it is equally possible to arrange the surface elements spaced from each other or to bring them into direct contact with each other. It is only crucial that a relative mobility of the surface elements to each other is possible. A permanent force transmitting connection between the surface elements is therefore a hindrance to the success of the present invention.

State of the art

Lighting installations according to the type described above are known in the art. For this purpose, for example, the published patent application DE 199 46 015 A1 referenced, showing two successively arranged perforated grid, by means of a radiator be illuminated. From the wider environment of the generic lighting installation is still the document US 2015/0198299 A1 known, which comprises a lighting installation with a columnar lamp. The latter is surrounded by two coaxially arranged cylindrical bodies, which are suitable for directing light emitted by the luminous means, starting from the side facing the luminous means, to the opposite side, wherein an irregular patterning of the surface elements causes certain optical effects. One of the cylindrical surface elements is made rotatable relative to the other, in order to produce a iridescent effect can.

Also known is the already mentioned Moire effect, which describes the optical generation of a superordinate, comparatively coarse pattern, which is caused by superposition of at least two, relatively fine patterns. The patterns may be formed, for example, in the form of partially translucent surfaces which are illuminated from one side by means of a light source. Among other things, this effect is known from the perception of two overlapping nets that are twisted or staggered relative to one another such that the individual recesses between the nets of the nets do not completely cover one another.

The moiré effect is based on the fact that light striking the respective pattern can pass through the patterns arranged one behind the other as the patterns overlap in a specific, regular manner. This regularity is then perceived again by the human brain in the form of a (superordinate) pattern. For the generation of the moiré effect, it is particularly advantageous if the individual passages that the light can take through the patterns are regularly distributed.

The known lighting installations have the disadvantage that a change of their respective optical impression is comparatively expensive to achieve.

task

The present application has for its object to provide a lighting installation that produces a visually pleasing light impression, with a change in the visual impression should be possible with the simplest possible means.

solution

The present object is achieved on the basis of the lighting installation of the type described above according to the invention that at least one of the surface elements is formed formlabil.

For the purposes of the present application, the term "dimensionally stable" is understood to mean that the surface elements are not suitable, or if at all, only to a negligible extent for absorbing bending moments and compressive forces. A typical example of a formlabiles element is a rope that is only suitable for absorbing tensile forces. Accordingly, a formlabiles surface element may for example be formed by a network or a flat textile. The particular advantages of such an embodiment will be explained separately below.

The lighting installation according to the invention has many advantages. In particular, it is particularly easy to change an optical impression of the lighting installation, since the formlabile surface element can be particularly easily changed in shape, in particular by means of stretching or stretching and / or tugging. In this way, it is particularly easy to create variety and to attract visual attention.

The formation of the surface elements in a form-labile manner also has the particular advantage that such surface elements can be deformed by applying a force, in particular a force oriented perpendicular to the respective surface element. Thus, it is conceivable in a particularly simple manner to move such a form-stable surface element by manual application of a force and to deform at least temporarily, whereby the overlap of the respective surface element is changed with the at least one further surface element. In particular, a movement in a direction perpendicular to a surface of the respective surface element direction is particularly easy to imagine. Furthermore, unlike dimensionally stable surface elements, it is possible to change the shape of a dimensionally stable surface element, for example by means of tearing, starting from a rectangular basic shape to produce the shape of a parallelogram.

As a result of a respective change occurs immediately a change in the resulting visual impression of the lighting installation, since the light emitted from the light source, the successively arranged surface elements passes in a different way and thereby results in a changing optical impression for the viewer of the lighting installation. In other words, the pattern generated due to the moiré effect is changed by the deformation and / or translational and / or rotational movement of at least one surface element. It is understood that such Modification using a form-stable surface element is particularly easy.

The perforations of the surface elements may in particular be formed by individual apertures, which are deliberately introduced into an otherwise dense surface element. In a particularly advantageous embodiment, at least one of the surface elements, preferably all surface elements, formed by a textile. In particular, it is advantageous if the surface elements are each formed by a knitted fabric, wherein the "perforations", that is, recesses, result automatically between the individual threads of a knitted fabric. In addition, a knit fabric is particularly advantageous insofar as the existing perforations are typically distributed uniformly over the surface of the surface element. Furthermore, a particular advantage of a knitted fabric is that it has a particularly high elasticity. This is due to the fact that, unlike, for example, a woven fabric, the individual threads of a knitwear do not completely pass through the respective surface element in the form of warp threads or weft threads. Instead, the individual threads are laid in a knit in loops. This embodiment gives the knit a high elasticity, since the individual threads are as it were slack in the fabric and have a high reserve of length.

The high elasticity of a textile fabric, and in particular a knitted fabric, has the particular advantage that such a fabric can be particularly easily deformed, in particular stretched and / or distorted. Consequently, it is particularly easy by means of such surface elements to produce a relative movement between surface elements of the luminous installation according to the invention. In particular, it is conceivable that by simply "touching" and "plucking" the respective surface element or even individual threads of the same generates a change in shape of the respective surface element and in this way the described movement can be effected. In other words, it is particularly easy by means of such surface elements to produce a lighting installation in which it allows the user to change the optical impression of the lighting installation as a whole at least temporarily by simply touching, for example, each outer surface element.

Furthermore, it is particularly advantageous for the luminous installation according to the invention if the individual surface elements are arranged at least substantially, preferably completely, parallel to one another. It is also advantageous if the surface elements are executed in a flat. These features are not necessarily mandatory; It is also conceivable, for example, that the surface elements have a certain shape have, for example, brought into a curved shape. Both the parallel arrangement of the surface elements and a planar embodiment of the same, taken alone, but in particular, in combination, a particularly simple change of the optical impression produced by the light installation. Above all, it is particularly easy to move such surface elements relative to each other and in this way to change the coverage of the same described.

In a particularly advantageous embodiment of the luminous installation according to the invention, the same has at least one frame means, by means of which at least one of the surface elements, preferably all surface elements, is or can be mounted on at least two opposite outer edges. Advantageously, the frame means is designed such that a respective surface element can be mounted circumferentially, that is, along all its outer edges. The storage of the surface elements may in particular consist of clamping them, so that tensile forces can be absorbed by means of the frame device. By means of such a frame device, it is particularly easy to a respective stored surface element to which, for example by an outer edge of a surface element relative to the opposite outer edge by means of the frame means, for example by means of an electric drive, is moved so that the distance between the opposite outer edges of Area element enlarged. As a result of such a movement of the frame means, the respective surface element is stretched, whereby it is moved in total relative to the respective other surface elements. In this respect, the stretching of the surface element is a special form of movement to see.

In a comparable manner, it is conceivable that a surface element is moved in total translational and / or rotational, without a change in the outer dimensions occurs. Furthermore, it is conceivable that at least one surface element is distorted, for example, is converted from a rectangular shape in the form of a parallelogram. Alternatively, at least one of the surface elements can also be arched or twisted. For the purposes of the present application, all these deformations and other deformations and displacements are to be understood as "movements" of a surface element, since a change in the covering of the same takes place through these types of movement of a surface element relative to at least one further surface element, as a result of which the optical impression described above the lighting installation is changed altogether, since the light is the surface elements permeates after completion of the movement in a different way than was the case before the movement.

The luminous installation according to the invention further embellishing comprises selbige at least one spacer device, in particular a flat, inflatable inflatable body. The spacer device is arranged between adjacent surface elements, wherein the spacer device is at least in engagement with parts of the adjacent surface elements. By means of actuation of the spacer device, it is possible to change a distance between the surface elements measured in the beam direction of the light source, which in turn corresponds to a form of movement of the surface elements relative to one another. In order to allow a passage of light through the perforations of the successive surface elements, it is understood that the spacer device is advantageously formed by a transparent material. In particular, when using a swelling body, it is conceivable that the same comprises a pressure chamber delimited by a transparent film, which volume can be changed by introducing a gas, in particular air. By appropriate design of such a swelling body also a certain geometry can be generated, which already inherent in the body itself. In this way, it is also conceivable to move the respective adjacent surface elements in regions in different ways relative to each other.

In addition, it is particularly easy to envisage an arrangement of a plurality of spacing devices, which move different areas of the area elements in different intensities or in different ways relative to each other and thus make the change in the visual impression of the lighting installation overall complex.

As already indicated above, to produce the movement between the respective surface elements, it is conceivable to move the same in translation relative to one another and / or to change, in particular to stretch or to tear, at least one of the surface elements in its shape. Accordingly, it is advantageous for the lighting installation if the same has at least one movement device for the translatory and / or rotational movement of at least one surface element and / or at least one stretching device for stretching and / or tearing at least one surface element. By means of a stretching device, it should be possible in particular to stretch or stretch at least one planar surface element in the direction of its plane, so that its outer dimensions change. Using the example of a knitted fabric, such an extension causes the threads of the knitted fabric to lengthen, with the perforations between them Enlarge the individual threads equally. As a result, in each case it is achieved that the light of the light source falling on the surface elements takes a different path through the surface elements and consequently the viewer of the lighting installation experiences a changed optical impression from a side facing away from the light source. Also, devices are conceivable that cause both a pure translational movement and an extension.

To form the diffuse light source, the lighting installation according to the invention has in an advantageous embodiment at least one light source, preferably a plurality of individual light sources, and at least one separate diffuser, the diffuser is arranged in the beam direction of the outgoing light from the light source between the light source and the surface elements , In other words, the diffuser is positioned such that the light emanating from the illuminant must pass through the diffuser to reach the surface elements. In an advantageous embodiment, a register of a multiplicity of LEDs is conceivable as the illuminant, wherein the diffuser may be formed, for example, by a frosted glass pane or a plastic pane, in particular a plexiglass pane. In general, the diffuser can basically be formed of any type of material that allows the passage of light and thereby unfolds a certain dispersing effect, so that the light emitted by means of the lamp or light is scattered at least to some extent and the effect of diffused Light is setting.

For example, it is conceivable that a plurality of individual controllable RGB LEDs is used as the light source. By means of such bulbs, it is particularly easy to generate a specific color mood up to images that are visually blurred beyond the diffuser in optical viewing, for example landscape images.

As a diffuser, a polyester fleece can be used in a particularly advantageous embodiment of the light installation according to the invention, which is preferably formed by a plurality of white and / or transparent, interconnected polyester threads. Such polyester nonwovens are known in particular as acoustic nonwovens. As such, they are used in the field of sound insulation, with the use of such an acoustic fleece in particular to avoid the reflection of sound. For this purpose, such an acoustic fleece has a multiplicity of fine pores on which, so to speak, the sound "swallow".

The individual pores within such a polyester fleece are also suitable for dissipating a light beam entering the respective pores to a certain extent by reflecting the light on the walls of the respective pores in different ways, ie in different directions. Furthermore, a certain photoconductive effect of the individual threads of the polyester fleece takes place, in which, basically comparable to a glass fiber, light enters a thread and is reflected in the way of total reflection on the walls of the respective thread. As a result, these effects cause the light incident on the polyester nonwoven to be scattered by means of the polyester nonwoven, so that it acts as a diffuser. Such a polyester nonwoven fabric may have, for example, a thickness of 5 mm to 20 mm and a basis weight of 200 g / m ² to 1000 g / m ² . An equipped by means of such a polyester fleece lighting installation has correspondingly positive sound properties.

By means of the design of the diffuser by means of a described polyester or acoustic nonwoven fabric, the luminous installation according to the invention can fulfill two functions and in this way have a particularly advantageous effect. Thus, it contributes as such to the lighting of a respective room, the visually appealing design also offers a spatial design value. Furthermore, an acoustically effective surface is created by means of the diffuser formed in the manner mentioned, which supports the formation of the room acoustics. This can be of particular advantage, for example, in meeting rooms which - according to today's typical type - are primarily designed with hard surfaces, that is possibly parquet floor, exposed concrete walls, exposed concrete ceiling, curtain-less windows, etc. Sound-absorbing surfaces are very scarce in such rooms adversely affects the room acoustics. In particular, there may be reverb effects that are disruptive to meetings. The special design of the diffuser gives the lighting installation according to the invention now an acoustic effectiveness and thus ultimately the double function described.

In a further advantageous refinement of the luminous installation according to the invention, the same has a frame device which interacts with two opposing, at least substantially vertically oriented side surfaces each having a plurality of surface elements, in particular two surface elements, wherein in the interior of the frame device, that is, between the opposite sides, at least one light source is arranged. Advantageously, such a light source is formed by a plurality of individual light sources. By means of such a lighting installation can be formed, so to speak, a free-standing "luminous wall", the light not only in one direction, but in at least two radiates opposite directions. The other advantages that occur by the movement of the respectively associated surface elements relative to each other, are of course achieved in the same way.

• c) Mindestens eines der Flächenelemente wird verformt.

Based on the method of the type described above, the underlying object is achieved by the following method step:

• c) At least one of the surface elements is deformed.

This method step is particularly easy to carry out by means of the light installation according to the invention, since form-flat surface elements can be readily reversibly deformed. Although dimensionally stable surface elements can also be deformed in principle, this approach is highly disadvantageous because of the occurrence of plastic deformation and the considerable force required for deformation.

In particular, by means of the deformation of the surface elements, a change in the coverage of the perforations present in the surface elements is to be effected. In particular, it is easy to imagine that at least one surface element deformed, in particular stretched or distorted, and thereby relatively moved to the other surface elements. By means of the method according to the invention, it is consequently possible to change the visual impression of a lighting installation, so that the lighting installation has an optical added value. In particular, it is conceivable to perform the movement of the at least one surface element manually, for example by touching a respective surface element, and in this way to give the lighting installation a certain entertainment value. For example, it is conceivable that the lighting installation is arranged as a planar lighting on a room delimiting element of a room and can easily generate different lighting moods and optical forms by the effect of moire effect.

embodiments

Fig. 1:

Einen Querschnitt durch eine erfindungsgemäße Leuchtinstallation,

Fig. 2:

Eine schematische Skizze einer Streckeinrichtung einer erfindungsgemäßen Leuchtinstallation,

Fig. 3:

Eine schematische Skizze einer weiteren Streckeinrichtung einer erfindungsgemäßen Leuchtinstallation,

Fig. 4:

Ein Querschnitt durch einen Teil einer erfindungsgemäßen Leuchtinstallation, die eine Abstandseinrichtung aufweist,

Fig. 5:

Ein Querschnitt durch die Leuchtinstallation gemäß Figur 4, wobei sich die Abstandseinrichtung in einem aktiven Zustand befindet, und

Fig. 6:

Eine schematische Ansicht einer erfindungsgemäßen Leuchtinstallation mit einer Mehrzahl von Abstandseinrichtungen.

The luminous installation according to the invention and the method according to the invention are explained in more detail below with reference to exemplary embodiments which are illustrated in the figures. It shows:

Fig. 1:

A cross section through a lighting installation according to the invention,

Fig. 2:

A schematic sketch of a stretching device of a lighting installation according to the invention,

3:

A schematic sketch of a further stretching device of a lighting installation according to the invention,

4:

A cross section through a part of a lighting installation according to the invention, which has a spacing device,

Fig. 5:

A cross section through the light installation according to FIG. 4 , wherein the spacer device is in an active state, and

Fig. 6:

A schematic view of a lighting installation according to the invention with a plurality of spacing devices.

A first embodiment, which is in FIG. 1 is shown, comprises a lighting installation 1 according to the invention, which is equipped with two diffuse light sources 2 and a total of four surface elements 3 . In the present example, the diffuse light sources 2 are each formed by a plurality of light sources 9 and a downstream diffuser 10 . The light sources 9 are formed in the present example in each case by RGB LEDs, which are preferably controlled independently of each other. The diffusers 10 are here each formed by a polyester fleece, which has a thickness of 15 mm with a basis weight of about 400 g / m ² . The lighting means 9 are arranged on a centrally arranged in the lighting installation 1 support plate 14 , wherein the lighting means 9 are each aligned such that a main radiation direction of each of the bulbs 9 outgoing light is horizontally oriented. The support plate 14 is arranged in a plane of symmetry 18 of the inventive lighting installation 1, wherein the light sources 2 are respectively aligned to opposite sides. In other words, light emitted by the light sources 2 is emitted mainly in opposite directions. The support plate 14 is supplied with electrical current by means of a connecting line 17 , wherein it is also possible to connect the support plate 14 or the lighting means 9 arranged thereon to control electronics by means of the connection line 17 .

Viewed in the beam direction of the individual lighting means 9 , a pair of surface elements 3 is arranged beyond the diffusers 10 in each case. In each case, one of the surface elements 3 of a respective pair forms, as it were, the "first surface element" 12 , which is incident on the light emanating from the respective light source 2 , while the respective other surface element consequently constitutes a "further surface element" 13 which emanates from the light source 2 Light only then reached. In other words, the surface elements 3 of a pair of surface elements 3 are arranged one behind the other in the beam direction of the light emerging from the light source 2 .

The diffusers 10 cause the "directional" light emanating from the light sources 9 to be dispersed, resulting in a diffuse light. Consequently, the light sources 2 as a whole, that is, the totality of light sources 9 and a respective diffuser 10 , here as diffuse light sources 2 are formed. For the desired effect of the invention, the design of the light source 2 as a diffuse light source mandatory. However, it goes without saying that the generation of diffuse light can be imagined in many different ways and the combination of a plurality of LEDs with a polyester fleece shown here represents only one possibility.

In the example shown, the diffusers 10 each cooperate with a coating 15 which is arranged in each case on a side of the respective diffuser 10 facing away from the light sources 9 . Such a coating 15 may for example be formed by a film or a fabric, which is connected in force transmitting manner with the diffuser, for example, glued or laminated. By means of such a coating, for example, the lighting installation 1 overall color can be imparted by, for example, the fabric or the film have a certain color.

The lighting installation 1 according to the invention has a frame device 4 , by means of which the support plate 14, together with the light means 9 arranged thereon, the diffusers 10 and finally the surface elements 3 are mounted. The frame device 4 is provided overall with a stand 16 , by means of which it frame assembly 4 and consequently the lighting installation 1 can be set up on a substrate as a whole. The lighting installation 1 thus has the shape of a stele in the embodiment shown.

According to the invention it is possible in the lighting installation 1 to move the successively arranged surface elements 3 of a pair of surface elements 3 relative to each other. As described above, the term "move" in this context includes any type of translational, rotational or other movement of at least one surface element 3 , which leads to an overlap of perforations of the surface elements 3 is changed, so that an optical impression of the lighting installation 1 of one, a respective light source 2 opposite side 11 of an outer surface element 3, 13 from considered changed. In particular, an optical impression of the luminous installation caused by the moiré effect, that is to say in particular an optically resulting pattern on the outer surface element 3, 13, changes. The "movement" of at least one surface element may in particular comprise a partial movement resulting, for example, as a result of a movement Stretching or strain of at least one surface element 3 sets. It is basically of secondary Signifies whether such a movement on an inner, the light source 2 facing surface element 3 , 12 or the outer surface element 3 , 13 is applied.

The respective surface elements 3 of a pair of surface elements 3 are arranged in the example shown at a distance 7 from each other, which is measured perpendicular to the plane of symmetry 18 here. This distance 7 between the surface elements 3 is chosen to be particularly low. Likewise, it is conceivable that adjacent surface elements 3 are in direct contact with each other. Advantageously, however, there is at least a small distance, so that a movement of a surface element 3 relative to the respective other surface element 3 without the formation of frictional forces between the respective surface elements 3 is accompanied.

The surface elements 3 are each formed in the example shown by a knitted fabric. This embodiment is of particular advantage insofar as such surface elements have, in principle, a regular, finely rastered distribution of perforations, the perforations being formed to a certain extent by the spaces formed between the individual threads of the knitted fabric. On the other hand, the formation of the surface elements as knitted fabric is advantageous insofar as such surface elements have a particularly high elasticity. This is - as explained above - in the manner of producing a knitted fabric justified. In addition, a knit represents a formlabile structure that is not taken alone to be able to absorb bending moments and / or compressive forces or deduce. In other words, the surface elements 3 used in the embodiment shown here would not stand alone in the vertical orientation shown, but would in a sense "collapse". Therefore, it is of particular importance here that the surface elements 3 are held on an upper outer edge 5 . In the present example, the surface elements 3 are clamped by means of the frame means 4 . It is understood that an attachment of such surface elements 3 can be done in any way.

To effect a movement between mutually corresponding surface elements 3 different variants are conceivable. Exemplary is in an in FIG. 2 illustrated embodiment, a possibility to move a respective surface element 3 by means of a stretching device 8 . This stretching device 8 has a winding drive 20 , which is mounted rotatably driven, so that a winding roll of the winding drive 20 in both directions relative to its central axis of rotation according to the in FIG. 2 shown double arrow 24 can move. The winding drive 20 is directly connected to the inner surface element 3 , 12 of the pair used here Surface elements 3 coupled so that an operation of the winding drive 20 is adapted to wind the inner surface element 3 , 12 or unwind. It is understood that in the course of winding the surface element 3 selbiges is subjected to a tensile stress. So that this tensile stress is not completely reflected in an extension of the surface element 3 , a lower outer edge 5 of the surface element 3 is mounted by means of a spring element 21 . This spring element 21 has a tensile rigidity which goes below the tensile rigidity of the surface element 3 . As a result, the tensile force exerted on the surface element 3 by means of the winding drive 20 primarily causes an expansion of the spring element 21 , so that, as a result, the lower outer edge 5 of the surface element 3 moves in a certain direction in the direction of the winding drive 20 . Since the rigidity of the surface element 3 in turn is comparatively low, a certain elongation or extension also takes place within the surface element 3 .

The stretching device 8 in the present example acts somewhat like a combination of a stretching device 8 and a moving device. The guidance of the surface element 3 takes place particularly easily in the example shown by means of rotatable deflection rollers 23 . As a result, it is possible by means of the stretching device 8 , the associated surface element 3 , 12 according to the in FIG. 2 shown double arrow 22 to "move", this movement is in any case a combination of an extension and a translational movement. While the inner surface element 3, 12 is moved by means of the stretching device 8 , the outer surface element 3 , 13 remains unchanged. In other words, by the operation of the stretching device 8, a relative movement between the inner surface element 3, 12 and the outer surface element 3, 13 takes place. As a result, the above-described change of the visual impression of the associated lighting installation 1 is generated in total.

In a further embodiment, the in FIG. 3 is shown, an alternative stretching device 8 is used. The associated lighting installation 1 has two surface elements 3 , wherein, in contrast to the exemplary embodiment described above, both surface elements 3 now each interact with a stretching device 8 . For this purpose, the surface elements 3 are each mounted by means of a frame device 4 , wherein the frame means 4 each have a fixed side 29 and a clamping frame 30 . Respective outer edges 5 of the respective surface elements 3 cooperate with a fixed side 29 and a clamping frame 30 , respectively. The clamping frames 30 are designed such that they are movable relative to the respective opposite fixed side 29 of the frame device 4 . It is understood that the movement of the clamping frame 30 relative to the fixed side 29th alike is associated with a movement of each stretched in the frame means 4 surface element 3 . This movement of a respective surface element 3 takes place here in the scope of a pure stretching, as they use the in FIG. 3 shown double arrows 27 is indicated.

The movement of the clamping frames 30 takes place in the example shown in each case by means of two eccentric drives 25 . These each have an axis of rotation 26 about which a drive pulley is rotatably mounted eccentrically. The eccentric drives 25 are coupled to the respectively associated clamping frames 30 such that an operation of the eccentric drives 25 is accompanied by a corresponding movement of the clamping frames 30 . The proposed arrangement in the embodiment shown allows both a purely translational movement of a respective clamping frame 30 relative to its associated fixed side 29 and a combination of a translational and a rotational movement. In the former case, both the associated eccentric drives 25 are operated concurrently, while operating in the second case, only one of the eccentric 25 and the eccentric drives 25 are operated at least in different ways.

The mobility of the surface elements 3 by means of the stretching devices 8 results in the result that the visual impression of the lighting installation 1 changes overall when a viewer looks from a, a light source 2 side facing away 11 on the respective outer surface element 3, 13 .

In a further embodiment, in the FIGS. 4 and 5 2, this spacing device 6 is formed here by a swelling body arranged centrally between two surface elements 3 which correspond to one another. This inflatable body has an elongated pressure chamber 28 which is enclosed in a gas-tight manner by associated room delimiting elements. This pressure chamber 28 is fluidically connected by means of a pressure line 19 with a compressor, not shown in the figures, by means of which air in the pressure chamber 28 can be introduced. It is understood that by introducing air into the pressure chamber 28, a volume of the spacer device 6 increases. This in turn means that the existing between the surface elements 3 distance 7 is increased. This enlargement of the distance 7 represents a movement between the surface elements 3 in the sense of the present application, since the optical impression of the lighting installation 1 changes as a result of this change of the distance. In particular, a side facing away from the light source 2 side 11 of the pattern on the outer surface element 3 , 13th due to the relative movement of the same to the inner surface element 3 , 12 changed.

The last, in FIG. 6 Embodiment shows a lighting installation 1 , in which between four surface elements 3 a total of four spacing means 6 are arranged, which each considered on their own extend only over part of an entire surface of the surface elements 3 . In the example shown, the spacer devices 6 are each equipped the same size, so that they cooperate in each case in about one quarter of the respective surface elements 3 . The arrangement of a plurality of spacers 6 makes it possible to move the adjacent surface elements 3 in different areas of their surface in different ways relative to each other and in this way to increase the variety of ways to produce an optical impression.

The features described above in connection with the exemplary embodiments are in each case approximately independent of each other executable and useful and not dependent on the combinations disclosed herein. In particular, individual features of individual embodiments may be completely independent of the respective remaining features of the respective embodiment.

LIST OF REFERENCE NUMBERS

1

light installation

2

light source

3

surface element

4

frame means

5

outer edge

6

spacing means

7

distance

8th

stretching device

9

Lamp

10

diffuser

11

page

12

First surface element

13

Another surface element

14

support plate

15

coating

16

stand

17

connecting cable

18

plane of symmetry

19

pressure line

20

winding drive

21

spring element

22

double arrow

23

idler pulley

24

double arrow

25

eccentric

26

axis of rotation

27

double arrow

28

pressure chamber

29

solid page

30

tenter

Claims (12)

Illuminated installation (1), comprising - At least one light source (2) for the delivery of diffused light and at least two perforated surface elements (3), wherein the surface elements (3) relative to the light source (1) are arranged one behind the other, so that the light first from the light source (1) first meets a first surface element (3, 12) and only then at least one further surface element (3, 13) .
wherein the surface elements (3) each have a plurality of perforations which are formed regularly distributed over a surface of the surface element (3),
wherein at least a part of at least one of the surface elements (3) is movable relative to at least one further surface element (3) so that a covering of at least a part of the perforations of the surface elements (3) arranged one behind the other is modifiable relative to the light source (1),
characterized in that
at least one of the surface elements (3) is formed formlabil. Luminous installation (1) according to claim 1, characterized in that all surface elements (3) are designed to be dimensionally stable. Luminous installation (1) according to claim 1 or 2, characterized in that at least one of the surface elements (3), preferably all surface elements (3) is formed by a textile or are, in particular at least one surface element (3) is designed as a knitted fabric. Luminous installation (1) according to one of claims 1 to 3, characterized in that at least two surface elements (3) at least substantially, preferably completely, are arranged parallel to each other. Luminous installation (1) according to one of claims 1 to 4, characterized by at least one frame means (4), by means of which at least one of the surface elements (3), preferably all surface elements (3), to at least two opposite outer edges (5), preferably circumferentially, is storable or are. Luminous installation (1) according to one of claims 1 to 5, characterized by at least one spacer device (6), in particular a flat, inflatable inflatable body, which is arranged between adjacent surface elements (3), wherein by actuation of the spacer device (6) In the beam direction of the light emitted from the light source (2) measured distance (7) between the surface elements (3) at least in partial areas of the surface elements (3) is changeable, preferably the distance (7) in different sub-areas of the surface elements (3) by another Amounts is changeable. Luminous installation (1) according to one of claims 1 to 6, characterized by at least one movement device, by means of which at least one flat surface element (3) in a direction parallel to a plane of the respective surface element (3) direction relative to the or the other surface element (3 ) or surface elements (3) translationally and / or rotationally movable. Luminous installation (1) according to one of claims 1 to 7, characterized by at least one stretching device (8), by means of which at least one planar surface element (3) in at least one direction in its plane is stretchable, so that change outer dimensions of the surface element (3). Luminous installation (1) according to one of claims 1 to 8, characterized in that the light source (2) has at least one light source (9) and at least one separate diffuser (10), wherein the diffuser (10) in the beam direction of the light source ( 9) outgoing light viewed between the light source (9) and the surface elements (3) is arranged. Luminous installation (1) according to claim 9, characterized in that the diffuser (10) is formed by a polyester fleece, which is preferably formed by a plurality of white or transparent, interconnected polyester threads. Method for changing a lighting configuration of a lighting installation (1), comprising the following method steps: a) at least two perforated surface elements (3) are illuminated by means of a diffuse light source (2), the light emitted by the light source (2) Outgoing light first on a first surface element (3, 12) and then at least one further, in the radiation direction behind the first surface element (3, 12) arranged surface element (3, 13) meets. b) at least two surface elements (3) are moved relative to each other, so that an optical impression of a passage of the light through the surface elements (3) from a light source (2) facing away from side (11) of the surface elements (3) changes,
characterized by the following process step: c) At least one of the surface elements (3) is deformed. A method according to claim 11, characterized in that at least one of the surface elements (3) is pulled and / or stretched.

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