CLADDING ELEMENT AND LIGHTING SYSTEM

Description

Technical area

[0001] The invention relates to a cladding element for at least partially covering a wall or a ceiling and to a lighting system for illuminating a room with at least one workstation and preferably several workstations. State of the art

[0002] Today, luminaires are used in various designs, tailored to the specific application, to illuminate rooms and workplaces. The goal is usually to create light distribution curves that allow for the most optimal illumination for a specific situation.

[0003] Among other things, floor-standing lamps are often used in offices to illuminate workstations such as desks. While such lamps can sometimes provide good illumination for individual workstations, they can impair the use of the space and are often perceived as distracting. In particular, such lamps typically need to be positioned close to the workstation to ensure optimal illumination, which is often undesirable and impractical, especially for regularly changing workstations.

[0004] Alternatively or in addition, ceiling lights are also used to illuminate the workstations. For example, it is common to install panel lights suspended from or built into a ceiling to specifically illuminate one or more workstations. Such panel lights can be relatively small and focused, or larger and provide a wider beam.

[0005] Although such ceiling lights can be used to optimally illuminate workspaces, and although such lights are relatively unobtrusive because they are not placed where objects are stored or people are present, they are relatively inflexible. Especially for regularly changing workplaces, such as in offices where workgroups are formed based on projects, such ceiling lights are often too inflexible, as they must be moved, realigned, and reconfigured. Such ceiling lights are also often undesirable for interior design, as they are typically permanently mounted and therefore cannot be reconfigured.

[0006] Document WO2013 / 102862A1 discloses a cladding element according to the preamble of claim 1.

[0007] The object of the following invention is therefore to propose a system that enables a flexibly adaptable and designable, specific illumination of workplaces in a room. Description of the invention

[0008] The object is achieved according to the invention by a cladding element as defined in independent claim 1, and by a lighting system as defined in claim 12. Advantageous embodiments of the invention emerge from the dependent claims.

[0009] The essence of the invention is as follows: A cladding element for at least partially covering a ceiling or a wall of a room comprises a flat carrier substrate with a front side and a back side, a fastening structure arranged on the back side of the carrier substrate, and a light-shaping structure arranged on the front side of the carrier substrate. The fastening structure is designed to fasten the cladding element to a wall or ceiling. The light-shaping structure is designed to reflect a light beam directed onto the cladding element and to generate predefined light properties in the reflected light.

[0010] In the context of the invention, the term "ceiling" or "room ceiling" can refer to the upper boundary of an open or closed space. Ceilings are not necessarily, but typically, horizontally aligned. Similarly, the term "wall" in the same context can refer to a lateral boundary of the open or closed space. Walls are typically vertical or essentially vertical. The ceiling and wall can be formed by plastered masonry, panels, stretched textile materials, metals, concrete, glass, stone materials, or the like.

[0011] The term "covering" in the context of the cladding element can be understood as an arrangement on the ceiling or wall such that the ceiling or wall is not, or at least not completely, visible from the room at the location where the cladding element is positioned. The cladding element can be directly attached to the ceiling or wall or it can be spaced apart from it.

[0012] The term "predefined light properties" or "predefined luminous properties" in connection with reflected light can refer to the fact that the luminous properties are specifically determined for illuminating a room or workplace based on the properties of a luminous flux directed onto the cladding element and the nature of the light-shaping structure. In particular, the light properties of the reflected light can be predefined in such a way that a light distribution curve (LCD) specifically intended for the workplace or space in question is achieved. This allows a workplace to be advantageously illuminated in a targeted manner and / or an adapted, advantageous ambient lighting can be created in the room. The predefined light properties can also be used to create different lighting atmospheres, such as diffuse and / or directed.Lighting properties that exist without being adapted or taken into account when determining the lighting of the room or workplace are not to be understood as predefined in this sense.

[0013] In this context, the term "light distribution curve" refers to a characterization of the light emitted by a luminaire, which can be represented graphically. The luminous intensities in their various emission directions are linked to form a curve. The light distribution describes the spatial distribution of the light. The shape and symmetry of the light distribution indicate the depth or width, as well as the symmetry of the radiation.

[0014] In this context, the term "workplace" can refer to a typically horizontal or quasi-horizontal surface on which certain activities are performed. For example, a workplace can be a table surface, particularly the surface of an office or desk. Or it can be an area of ​​a room with or without one or more tables. It can also be just part of a table, such as a conference table in a meeting room.

[0015] The term "targeted illumination" in the context of the workplace can refer to the creation of a preferred light distribution curve (LCD). The goal is to ensure that the workplace is sufficiently illuminated while avoiding glare. Targeted illumination does not create a workplace illumination via the ambient lighting in the room, but rather a specific illumination of the workplace that is independent of the ambient lighting. Typically, the illumination of the workplace differs from the ambient lighting of the room. For example, the workplace often needs to be brightly lit to allow for comfortable reading, writing, or working.Depending on the configuration, such as the type, angle, homogeneity of a surface illuminated by a light source or the nature of the cladding element, pure workplace lighting or a combination of workplace and general lighting can be achieved.

[0016] The term "light beam" or luminous flux or beam can refer to a stream of visible light. This can be light emitted by a lamp or light source, and in particular, visible light emitted by a light emitter. The light beam can be a bundle of rays, where a bundle of rays is understood to be a number of light rays that are exactly or approximately parallel to each other or predominantly oriented in a similar direction. The light beam can also have an angle of propagation, as is typically found with point light sources.

[0017] The cladding element allows the light to be controlled locally, for example, on a wall or a workstation. Intermediate values ​​(dynamic light distribution curves) can also be created. Alternatively or additionally, lighting moods can also be controlled, for example, by adjusting the percentage of directed and / or diffused light.

[0018] Advantageously, the cladding element is designed to reflect at least 60% or at least 75% of the light beam directed onto the cladding element. This can be ensured in all embodiments of the cladding element.

[0019] The cladding element according to the invention enables, among other things, the creation of a lighting object that can emit light in a targeted manner. This can create a dematerialized luminaire or a virtual luminaire on the ceiling or wall. The creation of such a virtual luminaire enables great flexibility in the lighting and design of workplaces. For example, in rooms where workplaces change regularly, targeted lighting can be provided that can be adapted to the changes with relatively little effort, for example by simply repositioning the cladding element. For example, this can prevent ceiling lights from having to be rehung and / or standing or floor lamps from having to be adjusted in order to enable adapted lighting of the room or the individual workplaces when conditions change.

[0020] Furthermore, the cladding element according to the invention opens up new possibilities for interior design. The virtual luminaire can be perceived as a built-in luminaire without actually requiring installation. The cladding element also enables the appropriate illumination of workplaces in rooms where it is not possible to install or mount a luminaire in or on the ceiling. For example, the cladding element can be used to create ceiling lighting on ceilings that are too thin for installation, lack sufficient load-bearing capacity for installation or attachment, or that cannot be altered for historical preservation reasons, for example. Furthermore, no electrical connection to the ceiling is required. This means that the ceiling can be completely powerless, which is often advantageous and can avoid the need for a relatively complex ceiling construction.Furthermore, the lighting system can also be advantageous in relatively low room heights, as there are no structures protruding from the ceiling. Furthermore, the cladding element allows efficient use of ceilings for lighting, even though they have a relatively low reflectance and would therefore consume relatively high energy if used for reflected lighting.

[0021] Compared to known lighting systems with floor lamps, the cladding element according to the invention offers the following advantages: The luminaires or spotlights used can be designed relatively flexibly, since a large luminaire head is not necessary. For example, to provide good lighting, protruding luminaire heads are often used, which are relatively expensive and require a lot of material. The indirect lighting via the ceiling or wall, as made possible by the cladding element according to the invention, can be perceived as particularly pleasant. In addition, light graphics can be created. The cladding element according to the invention can be preferred in interior design, since no stands or larger lighting objects need to be set up in the room. Shadows caused by direct light can be prevented.The light produced can be close to the impression of daylight, which is often perceived as pleasant. Maintenance and installation can be relatively simple.

[0022] In addition to attaching the cladding element exclusively to a ceiling or a wall, it can also be attached to a ceiling or one or more walls of the room. This allows a corner-oriented lighting object to be created, which may be preferable in certain applications. For example, the variability of the solid angle of a spotlight can illuminate more of the wall, thus achieving higher vertical luminance, which can be helpful, for example, in improving facial recognition. At the same time, it can also create additional design freedom (degree of freedom) for interior design.

[0023] The cladding element according to the invention thus enables the creation of a system that can achieve flexibly adjustable illumination, for example, of workstations in a room or the entire room. It can also be implemented relatively efficiently and cost-effectively.

[0024] The fastening structure can be adapted to the cladding element and the associated ceiling or wall in any desired manner. For example, it can include openings for passing through or receiving screws, nails, or the like, or it can be equipped with hooks, clamps, or similar fastening means. Or it can have a hook-and-loop strip or part of a hook-and-loop fastener that is mounted on the ceiling or wall to interact with a corresponding part of the hook-and-loop fastener. Or it can be designed for electrostatic adhesion. Preferably, the fastening structure comprises an adhesive. The adhesive can be designed as an adhesive layer on the carrier substrate or as double-sided adhesive tape. With such an adhesive, the cladding element can be efficiently and securely attached directly to the ceiling or wall.Alternatively, the cladding element can also be suspended directly or at a distance from the ceiling. For this purpose, the mounting structure can comprise suspension elements such as cables, chains, straps, rods, or the like, or can be designed to be mounted on such suspension elements.

[0025] Alternatively or additionally, the fastening structure preferably comprises magnets. Such magnets can be applied over the entire surface or partially or piecemeal. With such magnets, the cladding element can be easily and efficiently attached to the wall or ceiling. For example, ceilings with metal panels are common, to which such a cladding element could be easily and detachably attached.

[0026] The carrier substrate can have any suitable basic shape, such as a rectangular or circular surface. It can also be shaped as a graphic form, such as a heart or a solid. The term "carrier substrate" can refer to any typically flat structure that provides support for the fastening structure and the light-shaping structure. For example, the carrier substrate can be a textile such as a cloth. In a preferred embodiment, the carrier substrate is a film. Such a film can be efficiently manufactured, robustly constructed, and flexibly formed. In an alternative preferred embodiment, the carrier substrate is a plate. The plate can be rigid or solid or elastic or flexible. Such a plate enables a robust implementation of the cladding element. For example, such a plate can itself be designed as panels.

[0027] The reflected light can be diffuse or substantially diffuse. The light-shaping structure preferably comprises reflection, refraction, and / or diffraction contours that direct the reflected light. The reflection contours enable the reflected light to be directed, thereby adjusting or determining the radiation characteristics of the reflected light. They can, in particular, be formed as a micro- or nanostructure. The light-shaping structure can also be coated with a light-directing coating, anodized, plated, or similar. The light reflected in this way can be partially directed, partially diffused, or substantially fully directed. This type of light is preferred in many applications.

[0028] The reflection, refraction, and / or diffraction contours of the light-shaping structure preferably comprise cones, prisms, linear structures, and / or pyramids. In this way, these light-directing contours can enable directed, diffuse, or partially diffuse reflection of light. Or they can have a refractive effect by shaping already reflected light, for example, via lenses. For example, the reflection contours can be arranged adjacent to a reflective layer, such as a mirror layer. They can also have a diffractive effect. A combination of these effects is also possible. Thus, the light-directing contours can efficiently direct the reflected light, creating a preferred light distribution curve.

[0029] In a preferred embodiment, the light shaping structure comprises a first reflection layer and a second reflection layer, wherein the first reflection layer is closer to the front side of the carrier substrate than the second reflection layer, the first reflection layer and the second reflection layer have different reflection properties, and the second reflection layer is partially translucent.

[0030] The two reflective layers can be created or produced in different ways. For example, they can be designed as an integral part, meaning a reflective base layer is sprayed with a white or other colored paint (overspray). Depending on the density of the paint, the reflected light is more diffuse or more directed. The two reflective layers can also be integral, meaning they lie in one plane, for example as a print on a substrate such as a film or glass. The print can include a pattern with different properties. The design and size of the pattern can be important. For example, a large-area pattern on one side can enable precise adjustment of the light properties.On the other hand, a small-area pattern may be desired to prevent patterned light at the target location and to create the most extensive illumination possible for aesthetic reasons. The pattern is preferably tailored to the intended use, taking these requirements into account. Alternatively, the two reflective layers can be designed additively, meaning each of the two reflective layers is formed as a covering layer, with the second reflective layer being translucent in places. The second reflective layer can, for example, have a pattern with translucent and opaque areas, such as a checkerboard pattern.

[0031] In particular, the second reflective layer is preferably partially translucent by being perforated. The perforations can be shaped in any way. For example, they can be round, square, or have other geometric shapes. The perforated second reflective layer can, for example, be checkerboard-shaped. Such a perforated second reflective layer allows for considerable freedom in designing the reflective properties of the cladding element, as well as its optical design. For example, any desired images can be applied to the carrier substrate. Among other options, a two-color version with reflective and white is possible. The radiation characteristics or atmosphere can then be adjusted via the density of the coating.

[0032] Preferably, the cladding element comprises an adjusting device, wherein the light-shaping structure can be changed by means of the adjusting device in such a way that it adjusts the predefined light properties of the reflected light. By changing the light-shaping structure, the predefined light properties of the reflected light can also be changed. As a result, the light properties or the light distribution can be adjusted using the adjusting device. This allows the cladding element to be efficiently adapted to the specific current situation in the application of the cladding element.

[0033] The light-shaping structure preferably comprises pigments, and the adjusting device comprises at least one electrode, wherein the at least one electrode is designed to arrange the pigments. Preferably, the background is silver and the pigments are white. The pigments can, in particular, be liquid pigments. Such pigments can be attracted or repelled and arranged using electricity. The term "arranging" in this context can refer to a displacement and / or alignment or directing of the pigments. By specifically directing and arranging the pigments, the light properties of the reflected light can be precisely and efficiently adjusted or adjusted. For example, white pigments can be arranged in front of a reflective surface, for example, of the carrier substrate, and can be arranged using the electrode.

[0034] The pigments are preferably provided as movable particles in a film. Such a film can be produced efficiently, precisely, and cost-effectively.

[0035] The control device preferably comprises a controller that regulates the power supply to the at least one electrode. Such a controller enables precise metering and supply of current to the electrodes, allowing the pigments to be directed and positioned efficiently and precisely.

[0036] The cladding element preferably comprises a photovoltaic element for powering the actuator and preferably other electrical loads. The photovoltaic element can be a photovoltaic film. Such a film could be provided as a layer of the cladding element. Photovoltaic cells can also be realized in colored film form today. Thus, such a photovoltaic film could be designed to simultaneously generate energy and reflect light, as the first or second reflective layer or as another part of the light-shaping structure.

[0037] In a further preferred embodiment, the light-shaping structure comprises a clear liquid in which electrically charged, darker particles or microparticles and oppositely electrically charged, lighter particles or microparticles are arranged. The light-shaping structure can further comprise a voltage generator with which electrical voltages can be generated in the liquid of the light-shaping structure. In this way, analogous to the operation of e-books, the particles or microparticles can be systematically arranged by applying a single electrical voltage. This allows the light properties to be adjusted efficiently and in a highly versatile manner. Furthermore, no energy is required to maintain the systematic arrangement of the particles.

[0038] According to the invention, the light-shaping structure has inhomogeneous reflection properties. Such a light-shaping structure can efficiently achieve a mixture of different preferred reflection properties. In particular, the light-shaping structure has inhomogeneous reflection properties by comprising multiple regions designed to reflect a light beam directed onto the cladding element differently from one another. Such regions can be used to easily and effectively create inhomogeneous reflection properties. The regions can, in particular, be distributed over multiple areas or over virtually the entire front side of the carrier substrate, or extend thereon.

[0039] According to the invention, the multiple regions of the light-shaping structure comprise a diffuse region designed to partially diffuse or diffusely reflect a light beam directed onto the cladding element. According to the invention, the diffuse region constitutes at least approximately 50%, or preferably at least approximately 60%, or more preferably approximately 70%, of the area with which the light beam directed onto the cladding element can be reflected. Such a diffuse region, in combination with a directionally reflecting region according to the invention, enables the generation of advantageously mixed reflection properties.

[0040] According to the invention, the multiple regions of the light-shaping structure alternate repeatedly. This enables easy mixing of the reflective properties, so that they are not or only partially perceptible separately by an observer. This allows for the creation of a preferred lighting or atmosphere. According to the invention, at least one of the multiple regions of the light-shaping structure is designed as dotted patterns. The term "dotted" encompasses any dot-, spot-, dot-, or speckled arrangement, or similar. With such a configuration of the multiple regions, the different reflective properties can be efficiently and relatively finely mixed.

[0041] Preferably, at least one of the multiple regions of the light-forming structure is produced by spraying with a dye. The term "dye" in this context can be understood as a coloring substance with which a substrate can be colored or dyed. For example, they can be designed as a spray paint to adhere to the substrate and thereby color it at least from the outside or from a visible side. By spraying in this way, the multiple regions can be created efficiently and with comparatively fine tuning.

[0042] In a preferred embodiment, the multiple regions are constructed of different materials, so that different reflecting regions comprise different materials. In this way, a total reflection can be precisely defined.

[0043] The cladding element is preferably designed to be sound-absorbing. The term "sound-absorbing" refers to the absorption or absorption of sound waves in the audible range. For example, it can be designed in accordance with the German industrial standard DIN EN ISO 354:2003 as a perforated cladding element or equipped with perforated areas for sound absorption. The cladding element has a sound absorption coefficient of at least approximately 0.3 in a frequency range from approximately 100 Hz to approximately 4,000 Hz. With such a cladding element, the same element or component can be used to illuminate a workplace on the one hand, and to protect the workplace from noise or unwanted sound on the other. Such a cladding element can also be used in other applications for lighting and simultaneous noise reduction.This allows the cladding element to be designed as a multifunctional component, which can be advantageous in many applications. For example, such a cladding element can achieve an average reverberation time of less than 0.6 seconds.

[0044] The cladding element preferably comprises a layer of sound-absorbing material. Such materials can be, for example, felt, foam, perforated wood, perforated foils, textiles, or the like. In this way, the cladding element can be efficiently designed as a soundproofing component. The layer of sound-absorbing material is preferably arranged on the front side of the carrier material. The front side is typically oriented towards the room or the workplace. In this way, the aforementioned layer can efficiently absorb sound at the target location or protect it from noise. The layer of sound-absorbing material is preferably translucent. In this way, light can penetrate this layer and be reflected by a structure arranged behind it.

[0045] Another aspect of the invention relates to a lighting system comprising a light emitter, a workstation, and a cladding element in an embodiment described above. In the lighting system, the cladding element is attached to a wall or ceiling of a room, the light emitter is configured to emit a stream of visible light onto the cladding element, and the cladding element is configured such that the stream of visible light emitted by the light emitter onto the cladding element creates a luminaire with predefined luminous properties. The luminaire specifically illuminates the workstation.

[0046] The "light emitter" as provided in the lighting system typically comprises at least one light source, in particular an LED light source, and an optical system with which the light emitted by the light source is adjusted or adjusted. In particular, the light source, together with the optical system, generates the visible light stream.

[0047] The term "luminaire object," as used in the context of the lighting system, refers to a homogeneous or inhomogeneous, closed light surface with a defined boundary or sharp edges. The luminaire object can have any shape on the cladding element. In particular, it can be round or polygonal. The luminaire object can be designed or adjusted in such a way that the light surface does not have a homogeneous luminance distribution. For example, it may be higher in the center. The human eye may not necessarily perceive this, but it can be noticeable in the workplace. This allows the illuminance to be adjusted between the wall and the table. The two extremes can be referred to as "center beam" and "ring beam."

[0048] In this context, the term "defined boundary" refers to a reduction in luminance on the cladding element to a maximum of 10%, a maximum of 5%, or virtually 0%, occurring over a maximum of approximately 30% of the diameter or a maximum of approximately 15% of the radius of the luminaire object or a central zone thereof. The central zone can be an area of ​​the luminaire object that is not assigned to the defined boundary, i.e., a boundary zone. The central zone can be a homogeneous light surface or, for example, it can exhibit a luminance gradient from the center to the edge zone. The diameter can be an approximate diameter for non-circular luminaire objects. For example, for a square shape, it can correspond to a diagonal of the square.

[0049] In this context, the term "sharp edge" is understood to mean a reduction in luminance by at least about 20%, at least about 25%, at least about 30%, at least about 40% or at least about 50%, preferably to about 0%, wherein this reduction occurs over a maximum of about 10% of the diameter of the luminaire object or a central zone thereof.

[0050] Using such a lighting element, the characteristics of the light reflected from the ceiling can be adjusted relatively precisely. The lighting element can be a spotlight or any other type of light. In particular, such a lighting system can efficiently realize the effects and advantages described above in connection with the cladding element in a workplace.

[0051] Preferably, the spotlight in the lighting system is permanently connected to the workstation. For example, it can be integrated into a desk leg or attached to the edge of an office tabletop. In this embodiment of the lighting system, the spotlight can be moved or migrated with the workstation or office table. This enables extremely flexible and simple illumination of workstations.

[0052] The light emitter preferably has an adjustment unit with which the properties of the visible light stream can be adjusted. For example, the light color and / or intensity can be adjusted with the adjustment unit. This enables the creation of a customized and well-defined luminaire object on the cladding element.

[0053] The adjustment unit of the light emitter is preferably designed to change the direction of the visible light stream. Furthermore, it is preferably designed to change the focus of the luminous flux. For this purpose, the light emitter can be equipped with a telescope, for example. In this way, the luminaire object can be flexibly created on the cladding element and adapted to changing workplaces. In particular, the adjustment unit can enable a change in the focus and the beam angle. The focus can be used to adjust the edge sharpness of the luminaire object, and the angle can be used to adjust the size of the luminaire object.

[0054] The lighting system preferably comprises a monitoring unit connected to the adjusting unit of the light spotlight. The monitoring unit is designed to monitor the workplace and, upon detecting a change in the workplace, to activate the adjusting unit. The adjusting unit adjusts the flow of visible light so that the illumination of the workplace by the luminaire of the cladding element remains constant. The change in the workplace can, for example, be a relocation of the workplace or desk. A change in the height of the desk can also be a change in the workplace, which is monitored and detected by the monitoring unit. In such a lighting system, the light spotlight can be fixedly arranged in the room.If the workplace changes location, the lighting object on the cladding element can be automatically adjusted, ensuring the workplace illumination remains constant. The lighting system can therefore automatically adapt to the lighting situation; for example, the virtual ceiling light can move with the workplace, ensuring constant illumination.

[0055] Preferably, the monitoring unit comprises a sensor that detects the position and / or orientation of the workstation. The sensor can be specifically designed to detect movements of the workstation. This enables automated and rapid detection and recording of any changes to the workstation.

[0056] Preferably, the visible light stream emitted by the light source onto the cladding element is a directed or partially diffused stream of visible light. This stream allows the luminaire object to be created on the cladding element with particular precision and efficiency.

[0057] The present disclosure further comprises the following aspects: A first aspect is a cladding element for at least partially covering a ceiling or a wall of a room, comprising: a flat carrier substrate having a front side and a back side, a fastening structure arranged on the back side of the carrier substrate, which is designed to fasten the cladding element to a wall or a ceiling, and a light-shaping structure arranged on the front side of the carrier substrate, which is designed to reflect a light beam directed onto the cladding element and to generate predefined light properties in the reflected light.

[0058] In a second aspect, the fastening structure of the cladding element comprises an adhesive.

[0059] In a third aspect, the fastening structure comprises magnets.

[0060] In a fourth aspect, the carrier substrate is a film.

[0061] In a fifth aspect, the carrier substrate is a plate.

[0062] In a sixth aspect, the light-shaping structure has reflection contours that direct the reflected light.

[0063] In a seventh aspect, the reflection contours of the light-shaping structure comprise cones, cones, prisms and / or pyramids.

[0064] In an eighth aspect, the cladding element of any of the preceding embodiments, wherein the light-shaping structure comprises a first reflection layer and a second reflection layer, wherein the first reflective layer is closer to the front side of the carrier substrate than the second reflective layer, the first reflective layer and the second reflective layer have different reflective properties, and the second reflective layer is partially translucent.

[0065] In a ninth aspect, the second reflective layer is partially translucent by being perforated.

[0066] In a tenth aspect, the cladding element comprises an adjusting device, wherein the light-shaping structure can be changed by means of the adjusting device in such a way that it sets the predefined light properties of the reflected light.

[0067] In an eleventh aspect, the light-shaping structure comprises pigments and the adjusting device comprises at least one electrode, wherein the at least one electrode is designed to arrange the pigments.

[0068] In a twelfth aspect, the pigments are provided as a printed structure in a film.

[0069] In a thirteenth aspect, the actuating device comprises a controller which regulates the supply of the at least one electrode.

[0070] In a fourteenth aspect, the cladding element comprises a photovoltaic element for supplying the actuating device.

[0071] In a fifteenth aspect, a background is silver and the pigments are white.

[0072] In a sixteenth aspect, the light-shaping structure has inhomogeneous reflection properties.

[0073] In a seventeenth aspect, the light-shaping structure has inhomogeneous reflection properties in that it comprises a plurality of regions which are designed to reflect a light beam directed onto the cladding element differently from one another.

[0074] In an eighteenth aspect, the plurality of regions of the light-shaping structure comprise a diffuse region configured to partially diffuse or diffusely reflect a light beam directed onto the cladding element.

[0075] In a nineteenth aspect, the diffused region constitutes at least about 50% or at least about 60% or preferably about 70% of the area with which the light beam directed onto the cladding element is reflectable.

[0076] In a twentieth aspect, the several areas of the light form structure alternate with each other repeatedly.

[0077] In a twenty-first aspect, at least one of the plurality of regions of the light-shaping structure is dotted.

[0078] In a twenty-second aspect, at least one of the plurality of regions of the light-shaping structure is formed by spraying with a dye.

[0079] In a twenty-third aspect, the plurality of regions are constructed of different materials such that different reflective regions comprise different materials.

[0080] In a twenty-fourth aspect, the cladding element is designed to be sound-absorbing.

[0081] In a twenty-fifth aspect, the cladding element has a sound absorption coefficient of at least about 0.3 in a frequency range of about 100 Hz to about 4,000 Hz.

[0082] In a twenty-sixth aspect, the cladding element comprises a layer of sound-absorbing material.

[0083] In a twenty-seventh aspect, the layer of sound-absorbing material is arranged on the front side of the carrier material.

[0084] In a twenty-eighth aspect, the layer of sound-absorbing material is translucent.

[0085] In a twenty-ninth aspect, a lighting system comprising a light emitter, a workstation and a cladding element according to one of the above aspects is provided, in which the cladding element is attached to a wall or ceiling of a room, the light emitter is designed to emit a stream of visible light onto the cladding element, the cladding element is designed in such a way that the stream of visible light emitted by the light emitter onto the cladding element creates a luminaire object with predefined luminous properties, and the luminaire object specifically illuminates the workplace. Short description of the drawings

[0086] Further advantageous embodiments of the invention will become apparent from the following description of exemplary embodiments of the invention with the aid of the schematic drawing. In particular, the cladding element according to the invention and the lighting system according to the invention are described in more detail below with reference to the accompanying drawings using exemplary embodiments. They show: Fig. 1 is a perspective sketch of a first embodiment of a lighting system according to the invention with a first embodiment of a cladding element according to the invention; Fig. 2 is a cross-sectional view of the cladding element of Fig. 1 ; Fig. 3 shows a cross-sectional view of a second embodiment of a cladding element according to the invention; Fig. 4 shows a perspective view of a third embodiment of a cladding element according to the invention; Fig. 5 shows a perspective view of a fourth embodiment of a cladding element according to the invention; and Fig. 6 shows a plan view of a section of a fifth embodiment of a cladding element according to the invention. Weq(e) for carrying out the invention

[0087] Certain terms are used in the following description for convenience and are not to be construed as limiting. The words "right," "left," "bottom," and "top" indicate directions in the drawing to which reference is made. The terms "inward," "outward," "below," "above," "left," "right," or similar terms are used to describe the relative arrangement of designated parts, the relative movement of designated parts, and the directions toward or away from the geometric center of the invention and designated parts thereof as illustrated in the figures. These spatial relative terms also include positions and orientations other than those illustrated in the figures. For example, if a part illustrated in the figures is turned over, elements or features described as "below" are then "above."The terminology includes the words expressly mentioned above, derivatives of the same and words of similar meaning.

[0088] The omission of an aspect from the description or a figure does not imply that this aspect is missing from the corresponding embodiment. Rather, such omission may serve to improve clarity and avoid repetition. Similar reference numerals in two or more figures represent similar or identical elements.

[0089] Fig. 1shows a first embodiment of a lighting system 1 according to the invention with a first embodiment of a cladding element 6 according to the invention. The lighting system 1 is installed in an office space 4 with a ceiling 41, walls 42, and a floor 43. A desk 3 with four table legs 32 and a tabletop 31 is arranged on the floor 43 of the office space 4. An upper side of the tabletop 31 forms a workstation 311.

[0090] The lighting system 1 comprises the workstation 311, the cladding element 6, and a light column 2 as a light source. The light column 2 is equipped with an LED lamp 21, an optical system, and an adjustment device. The adjustment device allows the light column 2 to be configured and adjusted. The light column 2 is positioned on the floor 43 in front of an edge of the tabletop 31.

[0091] The cladding element 6 is flat and pad-like and has an approximately circular basic shape. It is attached to the ceiling 41 and includes a light-forming structure 61 that is directed downwards. The cladding element 6 thus covers the ceiling 41 at the location where it is mounted.

[0092] As in Fig. 2As can be seen, the light-shaping structure 61 of the cladding element 6 has a pyramid-shaped microstructure as a reflection contour. It can be designed as a matt scattering structure, as a reflective structure, or as a mixture thereof. The cladding element 6 further comprises a carrier film 62 as a flat carrier substrate with an upper front side and a lower back side. On the back of the carrier film, an adhesive layer 63 is arranged as a fastening structure, which is designed to fasten the cladding element 6 to the ceiling 41. The light-shaping structure 61 is arranged on the front side of the carrier film 62 and is designed to reflect a light beam directed onto the cladding element 6 and to generate predefined light properties in the reflected light.

[0093] In Fig. 1It is further evident that the light column 2 emits a luminous flux 22, i.e., a stream of visible light, via its LED light source 21 and its optics, to the cladding element 6 attached to the ceiling 41. The light-shaping structure 61, with its reflection contour, is designed such that the luminous flux 22 creates a spot 5 as a lighting object with predefined luminous properties or a predefined light distribution. The spot 5 has a circular, homogeneous center zone 51 and a sharp-edged edge 52 as a closure. The light column 2 is configured such that the spot 5 created on the cladding element 6 preferentially illuminates the workstation 311. In particular, this illuminates or illuminates an area of ​​the top side of the desk 3 that is located next to a screen arranged on the desk 3.

[0094] Fig. 3shows a second embodiment of a cladding element 60 according to the invention. The cladding element 60 comprises a carrier film 620 as a flat carrier substrate with an upper front side and a lower back side. A plurality of magnets 630 are arranged on the back of the carrier film 620 as a fastening structure. The magnets 630 are intended in particular to fasten the cladding element 60 to a metal ceiling or wall. A two-part light-shaping structure is arranged on the front side of the carrier film 620, which comprises a first reflection layer 640 located closer to the front side of the carrier film 620 and a second reflection layer 610 located further away from the front side of the carrier film 620.

[0095] The first reflective layer 640 is a mirror layer that reflects incident light in a directed manner. The second reflective layer 610 reflects the light diffusely. Thus, the first reflective layer 640 and the second reflective layer 610 have different reflective properties. The second reflective layer 610 is perforated. In particular, it comprises square perforations arranged in a checkerboard pattern, through which light can pass to the first reflective layer 640. It is thus partially translucent. Due to the two-part design of the light-shaping structure, the cladding element 60 can reflect light both diffusely and directionally. This allows the desired light distribution for many applications to be generated.

[0096] In Fig. 4A third exemplary embodiment of a cladding element 68 according to the invention is shown. It comprises a carrier film 628 as a flat carrier substrate with an upper front side and a lower back side. An adhesive layer 638 is arranged on the back of the carrier film 628 as a fastening structure. A light-shaping structure 618 with a continuous flat mirror layer is attached to the front of the carrier film 628, which has pigments 6128 arranged in a substrate 6118. The substrate 6118 and the pigments 6128 can be provided as a printed structure in a film. The cladding element 68 further comprises an actuating device with a positive electrode, i.e., an anode 6138, and a negative electrode, i.e., a cathode 6148. The anode 6138 and the cathode 6148 lie opposite one another at the edge of the substrate 6118.

[0097] The cladding element 68 further comprises a control unit connected to the cathode 6148 and the anode 6138. By means of the control unit, the two electrodes can be adjusted so that the pigments 6128 are arranged and aligned. As a result, the reflection properties of the light-shaping structure can be changed by means of the adjusting device so that the light properties of the light reflected by the cladding element 68 are adjusted. In another embodiment of the cladding element of Fig. 4 Some pigments are silver and therefore directionally reflective, while others are white and therefore diffusely reflective.

[0098] Fig. 5shows a fourth embodiment of a cladding element 69 according to the invention. It comprises a carrier film 629 as a flat carrier substrate with an upper front side and a lower back side. An adhesive layer 639 is arranged on the back of the carrier film 629 as a fastening structure. Attached to the front side of the carrier film 629 is a light-forming structure comprising a clear liquid containing negatively charged dark microparticles 649 and positively charged light microparticles 619.

[0099] The cladding element 69, or its light-shaping structure, further comprises a voltage generator with which preferred electrical voltages can be selectively generated in the liquid of the light-shaping structure. Thus, by applying a single electrical voltage, the microparticles 619, 649 can be systematically arranged. No energy is required to maintain the systematic arrangement or the image; the image, once created, is retained.

[0100] In Fig. 5 The microparticles 619, 649 are arranged in a checkerboard pattern. This allows the reflection properties of the light-shaping structure to be individually and flexibly adjusted, allowing the light properties of the light reflected by the cladding element 69 to be adjusted.

[0101] Fig. 6shows a fifth embodiment of a cladding element 67 according to the invention. It comprises a carrier film 627 as a flat carrier substrate with an upper front side and a lower back side. An adhesive layer is arranged on the back of the carrier film 627 as a fastening structure. The front side of the carrier film 627 is printed, with a background 6117 of the print having first light-directing properties and a pattern 6127 of the print having second light-directing properties. The pattern 6127 comprises a plurality of regularly arranged dots. By dimensioning the dots of the pattern 6127 of the print and arranging the dots on the background 6117 of the print, the light properties of the cladding element 67 can be adapted to an intended use.

[0102] Although the invention has been illustrated and described in detail by means of the figures and the accompanying description, this illustration and detailed description are to be understood as illustrative and exemplary and not as limiting the invention. In order not to obscure the invention, in certain instances, well-known structures and techniques may not be shown and described in detail. It is understood that those skilled in the art may make changes and modifications without departing from the scope of the following claims.

Claims

1. Cladding element (6; 60; 67; 68; 69) for at least partially covering a ceiling (41) or a wall (42) of a room (4), comprising a plane carrier substrate (62; 620; 627; 628; 629) with a front face and a rear face, a fastening structure (63; 630; 638; 639) which is arranged on the rear face of the carrier substrate (62; 620; 627; 628; 629) and is designed to fasten the cladding element (6; 60; 67, 68; 69) to a wall (42) or a ceiling (41), and a light-shaping structure (61; 610, 640; 6117, 6127; 618; 619, 649) which is arranged on the front face of the carrier substrate (62; 620; 627, 628; 629) and is designed to reflect a light beam (22) directed onto the cladding element (6; 60; 67; 68; 69) and to generate predefined light properties in the reflected light, wherein the light-shaping structure (61; 610, 640; 6117, 6127; 618; 619, 649) has inhomogeneous reflection properties in that it comprises a plurality of regions which are designed to reflect a light beam (22) directed onto the cladding element (6; 60; 67; 68; 69) differently from one another, the plurality of regions of the light-shaping structure comprise a diffuse region which is designed to partially diffusely or diffusely reflect a light beam directed onto the cladding element, the diffuse region makes up at least approximately 50% of the area with which the light beam directed onto the cladding element can be reflected, and the plurality of regions of the light-shaping structure (61; 610, 640; 6117, 6127; 618; 619, 649) further comprise a directionally reflecting region, wherein characterized in that the light-shaping structure (61; 610, 640; 6117, 6127; 618; 619, 649) with its reflection contour is designed such that the light beam (22) creates a spot (5, 50, 50') as a light object with predetermined light properties, wherein the spot (5, 50, 50') has a homogeneous center zone and a sharp edge as a border, wherein at the sharp edge the luminance decreases by at least approximately 20% over at most approximately 10% of the diameter of the center zone.

2. Cladding element (6; 60; 67; 68; 69) according to any of the preceding claims, in which the light-shaping structure (61; 610, 640; 6117, 6127; 618; 619, 649) comprises a first reflection layer (640) and a second reflection layer (610), wherein the first reflection layer (640) is closer to the front face of the carrier substrate (62; 620; 627; 628; 629) than the second reflection layer (610), the first reflection layer (640) and the second reflection layer (610) have different reflection properties, and the second reflection layer (610) is partially translucent.

3. Cladding element (6; 60; 67; 68; 69) according to claim 2, in which the second reflection layer (610) is partially translucent due to being perforated.

4. Cladding element (6; 60; 67; 68; 69) according to any of the preceding claims, which comprises a control device (6138, 6148), wherein the light-shaping structure (61; 610, 640; 6117, 6127; 618; 619, 649) can be changed by means of the control device (6138, 6148) such that it sets the predefined light properties of the reflected light.

5. Cladding element (6; 60; 67; 68; 69) according to claim 4, in which the light-shaping structure (61; 610, 640; 6117, 6127; 618; 619, 649) comprises pigments (6128), and the control device (6138, 6148) comprises at least one electrode (6138, 6148), wherein the at least one electrode (6138, 6148) is designed to arrange the pigments (6128).

6. Cladding element (6; 60; 67; 68; 69) according to claim 5, in which the pigments (6128) are provided as a printed structure in a film.

7. Cladding element (6; 60; 67; 68; 69) according to claim 5 or 6, in which the control device (6138, 6148) comprises a control means which controls the supply of the at least one electrode (6138, 6148).

8. Cladding element (6; 60; 67; 68; 69) according to any of claims 4 to 7, which comprises a photovoltaic element for supplying the control device (6138, 6148).

9. Cladding element (6; 60; 67; 68; 69) according to any of the preceding claims, in which the diffuse region makes up at least approximately 60% or preferably approximately 70% of the area with which the light beam directed onto the cladding element can be reflected.

10. Cladding element (6; 60; 67; 68; 69) according to any of the preceding claims, which is designed to be sound-absorbing.

11. Cladding element (6; 60; 67; 68; 69) according to claim 10, which has a sound absorption coefficient of at least approximately 0.3 in a frequency range from approximately 100 Hz to approximately 4000 Hz.

12. Lighting system comprising a light emitter (2), a workstation (311) and a cladding element (6; 60; 67; 68; 69) according to any of the preceding claims, in which the cladding element (6; 60; 67; 68; 69) is fastened to a wall (42) or a ceiling (41) of a room (4), the light emitter (2) is designed to emit a stream of visible light onto the cladding element (6; 60; 67; 68; 69), the cladding element (6; 60; 67; 68; 69) is designed such that the stream of visible light emitted by the light emitter (2) onto the cladding element (6; 60; 67; 68; 69) produces a light object (5) with predetermined light properties, and the light object (5) illuminates the workstation (311) in a targeted manner.