Cladding element and lighting system.

Abstract

The invention relates to a cladding element (6) for at least partially covering a ceiling (41) or a wall (42) of a room (4). It comprises a planar support substrate with a front and a back. The cladding element (6) further comprises a fastening structure arranged on the back of the support substrate, which is designed for fastening the cladding element (6) to a wall (42) or a ceiling (41), and a light-shaping structure (61) arranged on the front of the support substrate. The light-shaping structure is designed to reflect a light beam (22) directed onto the cladding element (6) and to generate predefined light properties in the reflected light. The invention further relates to a lighting system with such a cladding element (6).

Description

Technical field

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

[0002] For the illumination of rooms and workplaces, luminaires in various designs adapted to the respective application are used nowadays. The aim is usually to generate light distribution curves with the luminaires that allow for the most optimal illumination possible for a given situation.

[0003] Among other things, floor lamps are frequently used in offices to illuminate workstations such as desks. While such lamps can provide good illumination of individual workstations, they can impair the use of the room and are often perceived as disruptive. In particular, for optimal illumination of a workstation, such lamps typically need to be positioned close to it, which is often undesirable and especially impractical for workstations that change regularly.

[0004] Alternatively or additionally, ceiling lights are also used to illuminate the workplaces. For example, it is known to provide surface-mounted luminaires suspended from or installed in a ceiling, which specifically illuminate one or more workplaces. Such surface-mounted luminaires can be relatively small and focused, or larger and provide a wider beam.

[0005] Although such ceiling lights are particularly suitable for illuminating workplaces and are relatively unobtrusive since they are not located where objects are placed or people are present, they are relatively inflexible. Especially in workplaces that change regularly, for example in offices where work groups are formed depending on the project, such ceiling lights are usually too inflexible because they have to be rehung, realigned, and configured. Such ceiling lights are also often undesirable for interior design purposes because they are typically permanently mounted and therefore cannot be rearranged.

[0006] The object of the following invention is therefore to propose a system that enables flexible, adaptable and customizable, specific illumination of workplaces in a room. Description of the invention

[0007] The problem is solved according to the invention by a cladding element as defined in independent claim 1, and by a lighting system as defined in independent claim 15. Advantageous embodiments of the invention are set forth in the dependent claims.

[0008] 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 planar support substrate with a front and a back, a fastening structure arranged on the back of the support substrate, and a light-shaping structure arranged on the front of the support substrate. The fastening structure is designed for attaching the cladding element to a wall or a ceiling. The light-shaping structure is designed to reflect a light beam directed at the cladding element and to generate predefined light properties in the reflected light.

[0009] In the context of the invention, the term “ceiling” or room ceiling can refer to an upper boundary of an open or closed space. While not necessarily, room ceilings are typically horizontally oriented. Similarly, in the same context, the term “wall” can refer to a lateral boundary of the open or closed space. Walls are typically vertical or substantially vertically oriented. The ceiling and the wall can be formed by plastered masonry, panels, stretched textile materials, metals, concrete, glass, stone materials, or the like.

[0010] The term ‘for covering’ in connection with the cladding element can be understood as an arrangement on the ceiling or wall so that the ceiling or wall is not visible from the room at the point where the cladding element is positioned, or at least not completely visible.

[0011] The term “predefined light properties” or “predefined luminous properties” in connection with the reflected light can refer to the fact that the luminous properties are specifically defined for illuminating a room or a workplace by means of the properties of a luminous flux directed onto the cladding element and the nature of the light shape structure. In particular, the light properties of the reflected light can be predefined in such a way that a light distribution curve (LDC) specifically intended for the workplace or room involved is achieved. This allows a workplace to be advantageously illuminated in a targeted manner and / or an adapted, advantageous ambient lighting to be created in the room. Furthermore, the predefined light properties can be used to create different lighting atmospheres, such as diffuse and / or directional lighting.Lighting properties that are present but were not adjusted or included in the planning of the room or workplace lighting are not to be understood as predefined in this sense.

[0012] In this context, the term “workplace” can refer to a typically horizontal or quasi-horizontal surface on which certain activities are carried out. For example, the workplace can be a table surface, and in particular 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 only part of a table, such as a conference table in a meeting room.

[0013] The term "targeted illumination" in the context of the workplace can refer to the creation of a preferred light distribution curve (LDC). The aim is, in particular, to ensure that the workplace is sufficiently illuminated and that glare is avoided. Targeted illumination does not simply provide illumination of the workplace via the general room lighting, but rather creates specific workplace illumination that is independent of the general room lighting. Typically, the workplace illumination differs from the general room lighting. For example, the workplace is often intended to be brighter 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 task lighting or a combination of task and ambient lighting can be achieved.

[0014] The term “light beam” or luminous flux can refer to a stream of visible light. This can be light emitted by a luminaire or light source, and in particular visible light emitted by a light source. 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 in a similar direction. The light beam can also have an angle of propagation, as typically occurs with point light sources.

[0015] The cladding element allows the light to be controlled locally, for example, on a wall or a workspace. Alternatively, intermediate values ​​(dynamic light distribution curve) can be generated. Alternatively or additionally, lighting moods can also be controlled, for example, by adjusting the percentage of the directional and / or diffuse light component.

[0016] The cladding element according to the invention enables, among other things, the creation of a luminaire object that can emit light in a targeted manner. This allows for the creation of a dematerialized luminaire or a virtual luminaire on the ceiling or wall. The creation of such a virtual luminaire allows for great flexibility in the lighting and design of workplaces. For example, in rooms where workstations change regularly, targeted lighting can be achieved, which can be adapted to the changes with relatively little effort, for example, by simply repositioning the cladding element. For example, this prevents the need to rehang ceiling lights and / or move floor lamps to provide adapted lighting for the room or individual workstations under changing conditions.

[0017] Furthermore, the cladding element according to the invention opens up new possibilities for room design. The virtual luminaire can be perceived as a built-in luminaire without any actual installation being necessary. The cladding element also makes it possible to illuminate workplaces effectively 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, too weak for mounting or mounting, or that, for example, may not be altered for reasons of historic preservation. No electrical connection is required on the ceiling. This allows the ceiling to be completely without electricity, which is often advantageous and can prevent a relatively complex ceiling construction.Furthermore, the lighting system can also be advantageous in rooms with relatively low ceiling heights, as no structures protrude from the ceiling. Additionally, the cladding element allows for the efficient use of ceilings for lighting that have a relatively low reflectance and would therefore have a relatively high energy consumption if used for illumination via reflection.

[0018] Compared to known lighting systems with floor lamps, the cladding element according to the invention offers the following advantages: The lamps or spotlights used can be designed with relative flexibility, since a large lamp head is not necessary. For example, for good lighting, bulky lamp 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 patterns can be created. The cladding element according to the invention can be preferred in room design, since no stands or larger lighting fixtures need to be placed in the room. Shadow formation from direct light can be prevented.The light produced can closely resemble daylight, which is often perceived as pleasant. Maintenance and installation can be relatively simple.

[0019] In addition to attaching the cladding element exclusively to a ceiling or a wall, it can also be attached simultaneously to a ceiling or one or more walls of the room. This allows a lighting element to be created around a corner, which may be advantageous in certain applications. For example, the variable angle of a spotlight allows more wall area to be illuminated, thus achieving a higher vertical luminance, which can be helpful, for instance, in improving facial recognition. At the same time, this can also create greater design freedom for interior architecture.

[0020] The cladding element according to the invention thus enables the creation of a system with which flexibly adjustable illumination of, for example, workstations in a room or the entire room can be achieved. It can also be implemented relatively efficiently and cost-effectively.

[0021] The fastening structure can be adapted to the cladding element and the associated ceiling or wall in any desired way. 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 fasteners. Alternatively, it can have a hook-and-loop fastener strip or part of a hook-and-loop fastener that is mounted to interact with a corresponding part of the hook-and-loop fastener on the ceiling or wall. Preferably, the fastening structure includes an adhesive. The adhesive can be designed as an adhesive layer on the substrate or as double-sided adhesive tape. With such an adhesive, the cladding element can be efficiently and securely attached to the ceiling or wall.

[0022] Alternatively or additionally, the fastening structure preferably comprises magnets. Such magnets can be applied over the entire surface or partially or in sections. With such magnets, the cladding element can be attached to the wall or ceiling easily and efficiently. For example, ceilings with metallic panels are widespread. Such a cladding element could be attached to these easily and releasably.

[0023] The support substrate can have any suitable basic shape, such as a rectangle or circle. It can also be shaped as a graphic form, such as a heart or a body. The term "support substrate" can refer to any typically planar structure that provides support for the mounting structure and the light-shaping structure. For example, the support substrate can be a textile such as a cloth. In a preferred embodiment, the support substrate is a film. Such a film can be manufactured efficiently, made robust, and flexibly shaped. In an alternative preferred embodiment, the support substrate is a plate. The plate can be rigid or elastic. Such a plate enables a robust implementation of the cladding element. For example, such a plate can itself be designed as panels.

[0024] The reflected light can be diffuse or substantially diffuse. Preferably, the light-shaping structure comprises reflection, refraction, and / or diffraction contours that direct the reflected light. The reflection contours enable the reflected light to be directed, thereby allowing the emission characteristics of the reflected light to be adjusted or determined. They can, in particular, be designed as a micro- or nanostructure. The light-shaping structure can also be equipped with a light-directing coating, anodized, with a galvanic layer, or similarly. The light thus reflected can be partially directed or partially diffuse, or substantially completely directed. Such light is preferred in many applications.

[0025] The reflection, refraction, and / or diffraction contours of the light-shaping structure preferably comprise cones, cones, prisms, line structures, and / or pyramids. In this way, these light-directing contours can enable directed, diffuse, or partially diffuse reflection of the light. Or they can act refractively 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 act diffractively. A combination of these modes of action is also possible. Thus, the reflected light can be efficiently directed by means of the light-directing contours, and a preferred light distribution curve can be generated.

[0026] In a preferred embodiment, the light shape structure comprises a first reflective layer and a second reflective layer, wherein the first reflective layer is located closer to the front of the support substrate than the second reflective layer, the first reflective layer and the second reflective layer have different reflection properties, and the second reflective layer is partially transparent.

[0027] The two reflective layers can be produced or created in various ways. For example, they can be integral, meaning that a reflective base layer is sprayed with a white or other colored lacquer (overspray). Depending on the density of the lacquer, the reflected light is either more diffuse or more directional. The two reflective layers can also be integral, lying in the same 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 printed pattern can be important. For example, a large-area pattern can allow for precise adjustment of the light properties.On the other hand, a small-scale pattern may be desirable to prevent patterned light at the target location and to create the most uniform illumination possible for aesthetic reasons. Preferably, the pattern is adapted to the intended use, taking these requirements into account. Alternatively, the two reflective layers can be additively designed, meaning that each reflective layer is formed as an opaque layer, with the second reflective layer being partially transparent. The second reflective layer can, for example, have a pattern with transparent and opaque areas, such as a checkerboard pattern.

[0028] In particular, the second reflective layer is preferably partially transparent 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, have a checkerboard pattern. Such a perforated second reflective layer allows for great freedom in designing the reflective properties of the cladding element as well as its optical design. For example, any image can be applied to the substrate. Among other things, a two-tone design with a mirrored and white layer is possible. The radiation characteristics or atmosphere can then be adjusted by changing the density of the coating.

[0029] Preferably, the cladding element comprises an adjusting device, wherein the light shape structure can be modified by means of the adjusting device so that it sets the predefined light properties of the reflected light. By changing the light shape structure, the predefined light properties of the reflected light can also be changed. Thus, the light properties or the LVK (light-shaping characteristics) can be adjusted with the adjusting device. In this way, the cladding element can be efficiently adapted to the specific current situation in the application of the cladding element.

[0030] The light-shaping structure preferably comprises pigments, and the positioning device comprises at least one electrode, wherein the at least one electrode is configured to arrange the pigments. The pigments can, in particular, be liquid pigments. Such pigments can be attracted or repelled and arranged by means of electricity. In this context, the term "arrange" can refer to a displacement and / or alignment or directing of the pigments. By selectively directing and arranging the pigments, the light properties of the reflected light can be precisely and efficiently adjusted or set. For example, white pigments can be arranged in front of a reflective surface, for example, of the support substrate, and can be arranged by means of the electrode.

[0031] The pigments are preferably provided as movable particles in a film. Such a film can be produced efficiently, precisely and cost-effectively.

[0032] The positioning device preferably comprises a control unit that regulates the power supply to the at least one electrode. Such a control unit enables precise metering and supply of current to the electrodes, so that the pigments can be directed and positioned efficiently and precisely.

[0033] Preferably, the cladding element comprises a photovoltaic element for supplying power to the actuator and preferably to 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 in film form can also be produced in various colors nowadays. Thus, such a photovoltaic film could simultaneously serve for energy generation and reflection as the first or second reflective layer or as another part of the light-shaping structure.

[0034] 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 include a voltage generator with which electrical voltages can be generated in the liquid of the light-shaping structure. In this way, analogous to the operating principle of eBooks, the particles or microparticles can be systematically arranged by applying an electrical voltage once. Thus, the light properties can be adjusted efficiently and with great versatility. Moreover, no energy is required to maintain the systematic arrangement of the particles.

[0035] Another aspect of the invention relates to a lighting system comprising a light source, a work area, and a cover element in an embodiment described above. In the lighting system, the cover element is attached to a wall or ceiling of a room, the light source is configured to emit a stream of visible light onto the cover element, and the cover element is designed such that the stream of visible light emitted by the light source onto the cover element generates a luminaire with predefined luminous properties. The luminaire illuminates the work area in a targeted manner.

[0036] The “light source” as provided in the lighting system typically comprises at least one light source, in particular an LED light source, and optics with which the light emitted by the light source is adjusted or adapted. In particular, the light source together with the optics generates the stream of visible light.

[0037] The term “luminaire object,” as used in connection with 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 such that the light surface does not have a homogeneous luminance distribution. This can be higher, for example, in the center. The human eye does not necessarily perceive this, but it can be noticeable in the workplace. Thus, the illuminance can be adjusted between the wall and the table. The two extremes can be referred to as the “center beam” and the “ring beam.”

[0038] In this context, the term “defined limit” refers to a decrease 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 of the luminaire or a central zone thereof. The central zone can be an area of ​​the luminaire that is not part of the defined limit, i.e., a boundary zone. The central zone can be a homogeneous light surface, or it can, for example, exhibit a luminance gradient from the center outwards to the edge zone. For non-circular shapes of the luminaire, the diameter can be an approximate diameter. For example, in the case of a square shape, it can correspond to a diagonal of the square.

[0039] In this context, the term ‘sharp edge’ means a decrease in luminance of 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 decrease occurs over a maximum of about 10% of the diameter of the luminaire or a central zone thereof.

[0040] The characteristics of the light reflected from the ceiling can be adjusted relatively precisely using such a luminaire. The luminaire can be a spotlight or any other type of luminaire. In particular, the effects and advantages described above in connection with the cladding element can be efficiently realized in a workplace setting with such a lighting system.

[0041] Preferably, in the lighting system, the light source is permanently connected to the workstation. For example, it can be integrated into a table leg of a desk or attached to the edge of a tabletop. In this embodiment of the lighting system, the light source can be moved or repositioned with the workstation or office table. This allows for extremely flexible and simple illumination of workstations.

[0042] Preferably, the light emitter 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 lighting effect on the cladding element.

[0043] The control unit of the light source is preferably designed to change the direction of the flow of visible light. It is also preferably designed to change the focus of the luminous flux. For this purpose, the light source can, for example, be equipped with a telescope. In this way, the luminaire can be flexibly positioned on the cladding element and adapted to changing workplaces. In particular, the control unit can enable a change in focus and beam angle. The focus can be used to adjust the edge sharpness of the luminaire, and the angle can be used to adjust the size of the luminaire.

[0044] Preferably, the lighting system comprises a monitoring unit connected to the control unit of the light source, wherein the monitoring unit is configured to monitor the work area and, upon detection of a change in the work area, to activate the control unit, the control unit adjusting the flow of visible light so that the illumination of the work area by the light source of the cladding element remains constant. A change in the work area could, for example, be a movement of the work area or the desk. A change in the height of the desk could also constitute a change in the work area that is monitored and detected by the monitoring unit. In such a lighting system, the light source can be fixedly positioned in the room.If the workstation is repositioned, the lighting fixture on the panel can be automatically adjusted, ensuring constant illumination. The lighting system can therefore automatically adapt to the lighting situation; for example, the virtual ceiling light can move with the workstation, thus guaranteeing consistent illumination.

[0045] 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.

[0046] Preferably, the current of visible light radiated from the light source to the cladding element is a directed or partially diffused current of visible light. With such a current, the luminaire object can be generated on the cladding element particularly precisely and efficiently. Brief description of the drawings

[0047] 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 and the lighting system according to the invention will be described in more detail below with reference to the accompanying drawings and exemplary embodiments. The drawings show: <tb>Fig. 1 <sep>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; <tb>Fig. 2 <sep>a cross-sectional view of the cladding element of Fig. 1; <tb>Fig. 3 <sep>a cross-sectional view of a second embodiment of a cladding element according to the invention; <tb>Fig. 4 <sep>a perspective view of a third embodiment of a cladding element according to the invention; <tb>Fig. 5 <sep>a perspective view of a fourth embodiment of a cladding element according to the invention; and <tb>Fig. 6 <sep>a top view of a section of a fifth embodiment of a cladding element according to the invention. Way(s) to implement the invention

[0048] Certain terms are used in the following description for practical reasons and are not to be understood restrictively. The words “right,” “left,” “below,” and “above” denote directions in the drawing to which reference is made. The terms “inward,” “outward,” “below,” “above,” “left,” “right,” or similar are used to describe the arrangement of designated parts relative to one another, the movement of designated parts relative to one another, and the directions toward or away from the geometric center of the invention and of designated parts thereof, as shown in the figures. These spatial relative terms also include positions and orientations other than those shown in the figures. For example, if a part shown in the figures is turned upside down, elements or features described as “below” are then “above.”The terminology includes the words explicitly mentioned above, derivatives of the same, and words of similar meaning.

[0049] The omission of an aspect in the description or a figure does not imply that this aspect is missing in the corresponding embodiment. Rather, such an omission can serve clarity and prevent repetition. Similar reference numerals in two or more figures represent similar or identical elements.

[0050] Fig. 1 shows 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 room 4 with a ceiling 41, walls 42 and a floor 43. A desk 3 with four legs 32 and a tabletop 31 is arranged on the floor 43 of the office room 4. The upper surface of the tabletop 31 forms a work area 311.

[0051] 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 light source 21, optics, and an adjustment mechanism. The light column 2 can be configured or adjusted by means of the adjustment mechanism. The light column 2 is positioned on the floor 43 in front of an edge of the tabletop 31.

[0052] 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-shaping structure 61, which is oriented downwards. The cladding element 6 thus covers the ceiling 41 at the point where it is mounted.

[0053] As can be seen in Fig. 2, 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 matte diffusing structure, a mirrored structure, or a mixture thereof. The cladding element 6 further comprises a carrier film 62 as a planar substrate with an upper front and a lower back. An adhesive layer 63 is arranged on the back of the carrier film as a fastening structure, which is designed for attaching the cladding element 6 to the ceiling 41. The light-shaping structure 61 is arranged on the front of the carrier film 62 and is designed to reflect a light beam directed at the cladding element 6 and to generate predefined light properties in the reflected light.

[0054] As can be further seen in Fig. 1, 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 shape structure 61, with its reflection contour, is designed such that the luminous flux 22 creates a spot 5 as a luminaire object with predefined luminous properties or a predefined luminous efficacy. The spot 5 has a circular, homogeneous central zone 51 and a sharp-edged edge 52 as a termination. The light column 2 is configured such that the spot 5 generated at the cladding element 6 preferentially illuminates the workstation 311. In particular, this illuminates or highlights an area of ​​the top of the desk 3 that is located next to a monitor arranged on the desk 3.

[0055] Fig. 3 shows a second embodiment of a cladding element 60 according to the invention. The cladding element 60 comprises a carrier film 620 as a planar substrate with an upper front and a lower back. A plurality of magnets 630 are arranged on the back of the carrier film 620 as a fastening structure. The magnets 630 are specifically designed to fasten the cladding element 60 to a metal ceiling or wall. A two-part light-shaping structure is arranged on the front of the carrier film 620, comprising a first reflective layer 640 located closer to the front of the carrier film 620 and a second reflective layer 610 located further away from the front of the carrier film 620.

[0056] The first reflective layer 640 is a mirror layer that reflects incident light specularly. The second reflective layer 610 reflects 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 therefore partially transparent. Due to the two-part design of the light-shaping structure, the cladding element 60 can reflect light both diffusely and specularly. This allows a desired LVK (light-shaping effect) to be generated for many applications.

[0057] Figure 4 shows a third embodiment of a cladding element 68 according to the invention. It comprises a carrier film 628 as a planar support substrate with an upper front and a lower back. 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 planar mirror layer is attached to the front of the carrier film 628. The mirror layer 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 adjusting 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 are located opposite each other at the edge of the substrate 6118.

[0058] The cladding element 68 further comprises a control unit connected to the cathode 6148 and the anode 6138. The control unit allows the two electrodes to be adjusted so that the pigments 6128 are ordered and aligned. This allows the reflective properties of the light-shaping structure to be modified by 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 thus reflect directionally, while the other pigments are white and thus reflect diffusely.

[0059] Fig. 5 shows a fourth embodiment of a cladding element 69 according to the invention. It comprises a carrier film 629 as a planar carrier substrate with an upper front and a lower back. An adhesive layer 639 is arranged on the back of the carrier film 629 as a fastening structure. A light-shaping structure is attached to the front of the carrier film 629, which comprises a clear liquid containing negatively charged dark microparticles 649 and positively charged light microparticles 619.

[0060] The cladding element 69, or its light-shaping structure, further comprises a voltage generator with which selectively preferred electrical voltages can be generated in the liquid of the light-shaping structure. Thus, by applying an electrical voltage once, the microparticles 619, 649 can be systematically arranged. No energy is required to maintain the systematic arrangement or the image; the image, once produced, is retained.

[0061] In Fig. 5, the microparticles 619, 649 are arranged in a checkerboard-like structure. This allows the reflection properties of the light-shaping structure to be changed individually and flexibly, so that the light properties of the light reflected by the cladding element 69 can be adjusted.

[0062] Fig. 6 shows a fifth embodiment of a cladding element 67 according to the invention. It comprises a carrier film 627 as a planar substrate with an upper front and a lower back. An adhesive layer is arranged on the back of the carrier film 627 as a fastening structure. The front of the carrier film 627 is printed, wherein a background 6117 of the print has first light-guiding properties and a pattern 6127 of the print has second light-guiding 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 a specific application.

[0063] Although the invention is 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 cases well-known structures and techniques may not be shown and described in detail. It is understood that those skilled in the art may make modifications and adaptations without departing from the scope of the following claims. In particular, the present invention covers further embodiments with any combinations of features that may differ from the explicitly described combinations of features. For example, the light-shaping structure may be designed as an electrochromatic glass plate. This plate may be milky when no current is supplied or transparent when current is applied.Or it can be a glass pane based on a different principle, capable of switching between white or milky white and transparent. One side of the glass pane is preferably coated with a reflective layer.

[0064] The present disclosure also includes embodiments with any combination of features mentioned or shown above or below in relation to various embodiments. It also includes individual features in the figures, even if they are shown there in connection with other features and / or are not mentioned above or below. Furthermore, the alternative embodiments described in the figures and the description, and individual alternatives of their features, may be excluded from the subject matter of the invention or from the disclosed subject matter. The disclosure includes embodiments that comprise exclusively the features described in the claims or in the exemplary embodiments, as well as those that comprise additional other features.

[0065] Furthermore, the expression "comprise" and derivatives thereof do not exclude other elements or steps. Likewise, the indefinite article "a" and derivatives thereof do not exclude a plurality. The functions of several features listed in the claims can be fulfilled by one unit or one step. The terms "essentially," "about," "approximately," and the like, in conjunction with a property or value, also define precisely that property or value. The terms "about" and "approximately" in connection with a given numerical value or range can refer to a value or range that lies within 20%, within 10%, within 5%, or within 2% of the given value or range. All reference numerals in the claims are not to be understood as limiting the scope of the claims.< / sep> < / tb> < / sep> < / tb> < / sep> < / tb> < / sep> < / tb> < / sep> < / tb> < / sep> < / tb>

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 planar support substrate (62; 620; 627; 628; 629) with a front and a back, a fastening structure (63; 630; 638; 639) arranged on the back of the support substrate (62; 620; 627; 628; 629), which is designed for fastening 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 designed to reflect a light beam (22) directed at the cladding element (6; 60; 67; 68; 69) and to produce predefined light properties in the reflected light.

2. Cladding element (6; 60; 67; 68; 69) according to claim 1, wherein the fastening structure (63; 630; 638; 639) comprises an adhesive.

3. Cladding element (6; 60; 67; 68; 69) according to claim 1 or 2, wherein the fastening structure (63; 630; 638; 639) comprises magnets (630).

4. Cladding element (6; 60; 67; 68; 69) according to one of the preceding claims, wherein the carrier substrate (62; 620; 627; 628; 629) is a film.

5. Cladding element (6; 60; 67; 68; 69) according to one of the preceding claims, wherein the support substrate (62; 620; 627; 628; 629) is a plate.

6. Cladding element (6; 60; 67; 68; 69) according to one of the preceding claims, wherein the light shape structure (61; 610, 640; 6117, 6127; 618; 619, 649) has reflection contours (61) that direct the reflected light.

7. Cladding element (6; 60; 67; 68; 69) according to claim 6, wherein the reflection contours (61) of the light shape structure (61; 610, 640; 6117, 6127; 618; 619, 649) comprise cones, prisms and / or pyramids.

8. Cladding element (6; 60; 67; 68; 69) according to one of the preceding claims, wherein the light shape structure (61; 610, 640; 6117, 6127; 618; 619, 649) comprises a first reflective layer (640) and a second reflective layer (610), wherein the first reflective layer (640) is located closer to the front of the support substrate (62; 620; 627; 628; 629) than the second reflective layer (610), the first reflective layer (640) and the second reflective layer (610) have different reflection properties, and the second reflective layer (610) is partially transparent.

9. Cladding element (6; 60; 67; 68; 69) according to claim 8, wherein the second reflective layer (610) is partially transparent by being perforated.

10. Cladding element (6; 60; 67; 68; 69) according to one of the preceding claims, comprising an adjusting device (6138, 6148), wherein the light shape structure (61; 610, 640; 6117, 6127; 618; 619, 649) can be modified by means of the adjusting device (6138, 6148) so that it sets the predefined light properties of the reflected light.

11. Cladding element (6; 60; 67; 68; 69) according to claim 10, wherein the light shape structure (61; 610, 640; 6117, 6127; 618; 619, 649) comprises pigments (6128) and the positioning device (6138, 6148) comprises at least one electrode (6138, 6148), wherein the at least one electrode (6138, 6148) is configured to arrange the pigments (6128).

12. Cladding element (6; 60; 67; 68; 69) according to claim 11, wherein the pigments (6128) are provided as a printed structure in a film.

13. Cladding element (6; 60; 67; 68; 69) according to claim 11 or 12, wherein the actuating device (6138, 6148) comprises a control which regulates the supply of the at least one electrode (6138, 6148).

14. Cladding element (6; 60; 67; 68; 69) according to one of claims 10 to 13, comprising a photovoltaic element for supplying the actuating device (6138, 6148).

15. Lighting system comprising a light source (2), a workstation (311) and a cover element (6; 60; 67; 68; 69) according to one of the preceding claims, wherein the cover element (6; 60; 67; 68; 69) is attached to a wall (42) or a ceiling (41) of a room (4), the light source (2) is configured to emit a stream of visible light to the cover element (6; 60; 67; 68; 69), the cover element (6; 60; 67; 68; 69) is configured such that the stream of visible light emitted by the light source (2) to the cover element (6; 60; 67; 68; 69) generates a luminaire (5) with predefined luminous properties, and the luminaire (5) selectively illuminates the workstation (311). illuminates.