Disc arrangement for a vehicle

Abstract

A disc assembly (1) for a vehicle (100) comprising a first disc element (10). The first disc element (10) has a first main surface (11) and a second main surface (12) opposite the first main surface (11) along a stacking direction (S1). The disc assembly (1) further comprises a second disc element (20). The second disc element (20) has a third main surface (21) and a fourth main surface (22) opposite the third main surface (21) along the stacking direction (S1). The second disc element (20) is coupled to the first disc element (10). A solar cell layer (30) is arranged between the first disc element (10) and the second disc element (20) and has a fifth main surface (31) and a sixth main surface (32). The sixth main surface (32) is opposite the fifth main surface (31) along the stacking direction (S1).The disk assembly (1) comprises a first plastic layer (40) arranged between the first disk element (10) and the solar cell layer (30). The disk assembly (1) comprises a second plastic layer (50) arranged between the second disk element (20) and the solar cell layer (30). The disk assembly (1) comprises a color layer (60) arranged between the first disk element (10) and the solar cell layer (30).

Description

[0001] The present invention relates to a disk arrangement comprising a color layer.

[0002] Some vehicles have a roof vent integrated into the roof, which is closed with a cover, usually made of glass, to allow a view out of the vehicle. The cover may be sliding to allow for ventilation as well as visibility. Furthermore, some vehicles have solar cells integrated into the cover, converting light energy into electrical energy. Additionally, some vehicles have various lighting options in their interior. For example, light guide elements are used in roof systems.

[0003] It is desirable to create a window arrangement for a vehicle that increases comfort in the vehicle interior.

[0004] According to one embodiment, a disc assembly for a vehicle comprises a first disc element having a first main surface and a second main surface. The second main surface is opposite the first main surface along a stacking direction. The disc assembly further comprises a second disc element having a third main surface and a fourth main surface. The fourth main surface is opposite the third main surface along the stacking direction. The second disc element is coupled to the first disc element.

[0005] The stacking direction is defined as extending from one side of the disc assembly outside the vehicle to one side of the disc assembly inside the vehicle. For example, the stacking direction extends from the first principal surface to the fourth principal surface. The area on the side of the disc assembly located inside the vehicle is also referred to as the vehicle interior. The area on the side of the disc assembly located outside the vehicle is also referred to as the exterior.

[0006] The first pane can be the outermost pane, forming the boundary between the vehicle's interior and the exterior, for example, when installed in a vehicle's roof. Alternatively, one or more elements can cover the first pane from above, so that it is not the outermost element, but, unlike the second pane, it faces the exterior. Similarly, the second pane can be the innermost pane, forming the boundary between the vehicle's interior and the roof. Alternatively, one or more elements can cover the second pane from below, so that it is not the innermost element, but, unlike the first pane, it faces the interior.

[0007] The first disc element and the second disc element are arranged according to the stacking direction such that the third main surface and the second main surface are aligned with each other.

[0008] The first, second, third, and fourth main surfaces each have a larger extent than the transverse lateral surfaces of the first and second disk elements. The first disk element extends across its entire surface and has a significantly larger extent along the first and second main surfaces than transversely to them. The second disk element extends across its entire surface and has a significantly larger extent along the third and fourth main surfaces than transversely to them. The first disk element and the second disk element extend along a lateral extensional surface.

[0009] The lateral extent area extends, for example, along a longitudinal direction of the vehicle, as is typical for a roadworthy motor vehicle. The longitudinal direction of the vehicle extends, for example, from the rear window to the windshield of the vehicle.

[0010] The lateral extent surface extends, for example, along a transverse direction of the vehicle, as is typical for a roadworthy motor vehicle. The transverse direction of the vehicle is perpendicular to the longitudinal direction of the vehicle. The transverse direction of the vehicle extends from a first longitudinal side of the vehicle to a second longitudinal side of the vehicle. The second longitudinal side of the vehicle lies opposite the first longitudinal side of the vehicle along the transverse direction of the vehicle. The first longitudinal side of the vehicle connects the rear window and the windshield. The second longitudinal side of the vehicle connects the rear window and the windshield. The first longitudinal side of the vehicle, the second longitudinal side of the vehicle, the rear window, and the windshield enclose, for example, the vehicle roof, which has the window arrangement. The lateral extent surface is spanned, for example, by the longitudinal direction and the transverse direction of the vehicle. The extent surface can be curved in the three spatial directions.

[0011] The disk assembly also includes a solar cell layer. This solar cell layer has a fifth and a sixth primary surface. The sixth primary surface is located opposite the fifth primary surface along the stacking direction. The solar cell layer is positioned between the first and second disk elements.

[0012] The two disc elements and / or the solar cell layer can be made of plastic and / or glass, or may contain both. For example, low-iron glass, especially soda-lime glass, or plastics such as polycarbonate, polymethyl methacrylate (PMMA), acrylic glass, or similar materials are used as glass materials.

[0013] The disc elements and / or the solar cell layer can be designed, in particular, as a film. In this context, a film is a planar material that is flexible at least along its planar extent. The disc elements and / or the solar cell layer can also be designed, in particular, as plates. In this context, a plate is a planar, particularly rigid, material that essentially maintains its shape independently. The disc elements and / or the solar cell layer can further comprise coatings or internal layers.

[0014] The disc elements and / or the solar cell layer can be flat or curved in the three spatial directions.

[0015] The window arrangement is implemented, for example, as a roof window. Alternatively, the window arrangement can comprise a roof window and a windshield, thus creating a monolithic structure consisting of the windshield and roof window. Alternatively, the window arrangement can comprise a roof window and a rear window, thus creating a monolithic structure consisting of the rear window and roof window. In a further alternative embodiment, the window arrangement can comprise a roof window, a windshield, and a rear window, thus creating a monolithic structure consisting of the windshield, rear window, and roof window.

[0016] In these cases, the vehicle's longitudinal direction extends from a first rear section to a second front section. The first rear section includes the rear window. The second front section includes the windshield. The first rear section and the second front section are coupled, for example, along the first longitudinal side of the vehicle. The first rear section and the second front section are coupled, for example, along the second longitudinal side of the vehicle.

[0017] The disc assembly also includes a first plastic layer. This first plastic layer is positioned between the first disc element and the solar cell layer.

[0018] The disc assembly has a second plastic layer. This second plastic layer is positioned between the second disc element and the solar cell layer.

[0019] The first plastic layer is bonded to the solar cell layer. Furthermore, the second plastic layer is bonded to the first plastic layer, so that the solar cell layer is embedded between the first and second plastic layers. The first and second plastic layers thus enclose the solar cell layer, or a multitude of solar cell elements arranged within the solar cell layer.

[0020] The first and second plastic layers between the two disc elements serve, for example, as a hot-melt adhesive layer to bond the first and second disc elements together. The plastic layers can be in the form of films. In one embodiment, the first and / or second plastic layer is made of, or comprises, a polymer such as polyvinyl alcohol (PVA) or polyvinyl butyral (PVB). In another embodiment, the first and / or second plastic layer is made of, or comprises, ethylene-vinyl acetate (EVA), thermoplastic polyolefin (TPO), polyolefin (PO), and / or thermoplastic polyurethane (TPU).

[0021] The first and / or second plastic layer can be multilayered, with one sublayer being made of one of the materials described above. Another sublayer can also be made of one of the aforementioned materials or a different material altogether. The first and second plastic layers can be made of the same materials or of different materials.

[0022] The first and second plastic layers can include further functional layers with optically variable properties. For example, the functional layer can be used to switch the transparency and / or translucency (opacity), i.e., from high transparency to low transparency and / or high translucency to low translucency and vice versa. This functional layer can consist of, for example, liquid crystals (LC), especially polymer-dispersed liquid crystals (PDLC), or other switchable materials. Such a glass arrangement is also called smart glass.

[0023] In one embodiment, the disc assembly has a third plastic layer arranged between the second plastic layer and the second disc element. The third plastic layer is made of, for example, a polymer such as polyvinyl alcohol (PVA) or polyvinyl butyral (PVB). In another embodiment, the third plastic layer is made of, or comprises, ethylene-vinyl acetate (EVA) and / or thermoplastic polyolefin (TPO) and / or polyolefin (PO) and / or thermoplastic polyurethane (TPU).

[0024] The third plastic layer can be multi-layered, with one of the sub-layers made from one of the materials described above. Another sub-layer can also be made from one of the aforementioned materials or from a different material.

[0025] The third plastic layer can include further functional layers with optically variable properties. For example, the functional layer can be used to switch its transparency and / or translucency (opacity), i.e., from high transparency to low transparency and / or high translucency to low translucency and vice versa. This functional layer can consist of, for example, liquid crystals (LC), especially polymer-dispersed liquid crystals (PDLC), or other switchable materials. Such a glass arrangement is also called smart glass.

[0026] The third plastic layer differs from the first and second plastic layers in that the third plastic layer has a greater hardness, for example Shore hardness, and / or a higher strength, for example tensile strength or compressive strength, than the first and second plastic layers, so that the third plastic layer can be printed on more easily, for example.

[0027] The third plastic layer is, for example, made of PVB film, which has a higher hardness and / or strength than the first and second plastic layers.

[0028] The disc arrangement is not limited to three plastic layers and can include further plastic layers, depending on the application. For example, as an adhesive bridge between other functional layers.

[0029] The disk assembly has a colored layer. The colored layer is located between the first disk element and the solar cell layer.

[0030] Solar cells in the solar cell layer are, for example, laminated into laminated glass. Depending on the arrangement of the solar cells, partial transparency is possible.

[0031] Different plastic layers or other layers in the structure of the disc arrangement serve, for example, to encapsulate the solar cell layer and as an adhesion bridge to the surrounding disc elements.

[0032] The combination of the solar cell layer and other layers, such as plastic layers, is used to ensure functionality and manufacturability. Functionality also includes the aspect of reducing transparency to avoid or at least minimize harsh shadows. These harsh shadows cause disruptive light effects in the vehicle interior while driving.

[0033] By selecting specific layers that, on the one hand, allow very high light transmission for the transport of light to the solar cell surface, and on the other hand, also alter the color appearance of the solar cells, an aesthetically pleasing overall impression is achieved. In this context, the layers referred to are the glass elements, plastic layers, and the color layer. This is not an exhaustive and therefore limiting list.

[0034] The color layer is based, for example, on inorganic pigments whose reflective properties allow everything behind the layer to appear colored. According to one embodiment, the color layer reflects a wavelength range from the light spectrum that corresponds to a defined color. Light that is not within the reflected wavelength range is largely transmitted and strikes the surface of the solar cell layer, thus generating electrical energy. In this way, a color impression of a selected color is created without significantly reducing the efficiency of power generation.

[0035] Alternatively, based on the morpho-butterfly effect, thin structures are applied as a layer to the second main surface. These layers are tuned so that only a specific wavelength range of the incident light, for example, sunlight, is reflected. The rest of the transmitted light spectrum falls onto the surface of the solar cell layer below.

[0036] Alternatively, the color layer is a colored foil.

[0037] The paint layer can have various colors. Within a single layer, the paint layer can contain a multitude of colors. For example, the paint layer might exhibit a color gradient along its surface. The paint layer might include, for example, green, blue, yellow, red, or violet colors. This is not an exhaustive and therefore limiting list. The paint layer may also contain other colors.

[0038] According to one embodiment, the solar cell layer comprises a plurality of solar cell elements. Adjacent solar cell elements are spaced apart from each other at a first distance along the longitudinal direction of the vehicle. Along the transverse direction of the vehicle, adjacent solar cell elements are spaced apart from each other at a second distance.

[0039] The disk arrangement is not limited to a continuous solar cell layer. A solar cell element can be, for example, a plate-shaped, spherical, and / or organic solar cell. The solar cell elements are arranged, for example, side by side and spaced apart along the lateral surface. The solar cell elements are spaced apart along the longitudinal direction of the vehicle at a first distance. Along the transverse direction of the vehicle, adjacent solar cell elements are spaced apart at a second distance.

[0040] The large number of solar cell elements arranged laterally next to each other creates a semi-transparent disk arrangement. Semi-transparent in this context means that several solar cell elements, for example, form the solar cell layer. The solar cell layer is interrupted and not continuous. For example, there are gaps between the solar cell elements. Alternatively or additionally, the solar cell elements are translucent.

[0041] The solar cell elements can be made of plastic and / or glass, or may contain both. For example, low-iron glass, especially soda-lime glass, or plastics such as polycarbonate, polymethyl methacrylate (PMMA), acrylic glass, or similar materials are used as glass materials.

[0042] The solar cell elements can be designed, in particular, as a film. In this context, a film is a planar material that is flexible at least along its planar extent. The solar cell elements can also be designed, in particular, as plates. In this context, a plate is a planar, especially rigid, material that essentially maintains its shape independently. The solar cell elements can further have coatings or internal layers. The solar cell elements can be planar or curved in the three spatial directions.

[0043] According to one embodiment, the paint layer comprises a plurality of paint layer elements. Adjacent paint layer elements are spaced apart by a third distance along the longitudinal direction of the vehicle. Along the transverse direction of the vehicle, adjacent paint layer elements are spaced apart by a fourth distance.

[0044] The paint layer is interrupted and not continuous. For example, there are gaps between paint layer elements. The arrangement of the panes is not limited to a continuous paint layer. The paint layer elements are arranged side by side and spaced apart along the lateral surface. Along the longitudinal direction of the vehicle, the paint layer elements are spaced apart by a third distance. Along the transverse direction of the vehicle, adjacent paint layer elements are spaced apart by a fourth distance.

[0045] According to one embodiment, the third spacing is less than or equal to the first spacing. The fourth spacing is less than or equal to the second spacing. The color layer elements overlap the solar cell elements along the stacking direction. The color layer elements have a larger extent along the lateral extent area than the solar cell elements.

[0046] According to one embodiment, the color layer elements have the same or different colors.

[0047] The color layer elements can have different colors. The color layer elements can have the same color or different colors. The different colors can be arranged along the extension surface in such a way that they represent a color transition. For example, the color layer elements exhibit a color transition along the extension surface. The color layer elements include, for example, green, blue, yellow, red, or violet colors. This is not an exhaustive and therefore limiting list. The color layer elements can also include other colors.

[0048] According to one embodiment, the color layer elements have a polygonal surface along their lateral extent. Alternatively, the color layer elements have a circular surface along their lateral extent. Alternatively, the color layer elements have an elliptical surface along their lateral extent. Alternatively, the color layer elements have a combination of polygonal, circular, and elliptical surfaces. The color layer elements can all have the same shape or be shaped differently. Depending on their positioning in the disc arrangement along their extent, a larger shape can be created from the individual color layer elements. The variably adjustable shape of the color layer elements allows for optimal coverage of areas within the disc arrangement.

[0049] According to one embodiment, the paint layer is arranged on the second main surface of the first disc element.

[0050] The colored layer, or individual colored layer elements, can be arranged on the first disc element. This simplifies the manufacturing of the disc assembly. For example, the colored layer can be a single layer in the form of a film and arranged on the second main surface. Alternatively, the color pigments necessary for producing the colored layer can be arranged within the first plastic layer. This first plastic layer, in turn, is arranged on the second main surface.

[0051] According to one embodiment, the color layer is arranged on the fifth main surface of the solar cell layer.

[0052] The color layer can be applied directly to the solar cell layer. For example, the color layer can be applied as a film to the fifth main surface. This also includes applying the color layer to individual solar cell elements. Alternatively, individual color layer elements can be applied to the solar cell layer. This also includes applying color layer elements to individual solar cell elements. Alternatively, a color layer element can be applied to more than one solar cell element, so that, for example, two or more solar cell elements are covered by one color layer element.

[0053] Applying the color layer directly to the solar cell layer allows for a more precise arrangement of the color layer or color layer elements on the solar cell layer or on the solar cell elements. This improves the overall aesthetic appearance. Furthermore, applying the color layer directly to the solar cell layer simplifies the manufacturing process for the array arrangement.

[0054] Alternatively, the colored layer is arranged on the sixth main surface of the solar cell layer, so that as much light as possible is absorbed by the solar cell layer and then the remaining portion of the light within a defined wavelength range is reflected. In this way, a color impression of a selected color is created.

[0055] According to one embodiment, the solar cell layer comprises at least one support substrate. One or more solar cell elements are arranged on the support substrate. The support substrate, for example, provides the electrical contact between the solar cells and the vehicle's electrical system. The support substrate may, for example, be made of copper or a copper alloy.

[0056] According to one embodiment, the second disc element is designed as a plate-shaped light guide element. The light guide element is coupled to a light source. The light guide element is configured to guide light supplied by the light source and provide it for a predetermined illumination of the vehicle interior.

[0057] The light guide element utilizes the effect of total internal reflection to direct light and illuminate the vehicle interior. The light is supplied by the light source, which is, for example, a light-emitting diode. Total internal reflection is a physical effect that occurs with waves, such as light waves. It occurs when light strikes a boundary layer with another transparent medium of lower refractive index at a shallow angle. The angle of incidence at this moment is called the critical angle of total internal reflection. The angle of incidence is defined as the angle between the light ray incident on the boundary layer and the normal perpendicular to the boundary layer. Below the critical angle, the light ray is refracted away from the normal upon striking the boundary layer and passes into the adjacent medium. Above the critical angle, total internal reflection occurs.The light no longer passes largely into the other medium, but is essentially reflected completely back into the original medium. Thus, light rays enter the light-guiding element, but only exit after several total internal reflections, for example, by using outfeed elements. The outfeed elements either change the angle of incidence such that outfeed of the light becomes possible because the critical angle is undershot and the conditions for total internal reflection are no longer met. Or the outfeed elements change the refractive index of the adjacent medium such that the critical angle at which total internal reflection still occurs is shifted so that total internal reflection no longer occurs for a given angle of incidence of the light rays. The outfeed element itself can be part of the adjacent medium.The light guiding element consists of, for example, polymethyl methacrylate and / or polycarbonate, or incorporates such a material.

[0058] The at least one light source illuminates the second pane element, which is coupled to it via at least one coupling element, for example, a prism. The prism is, for example, attached to the fourth main surface and couples the light from the light source into the light-guiding element formed by the second pane element. The area in which the light source and the prism are located is, for example, an edge region of the pane assembly. This edge region extends, for example, along the longitudinal direction of the vehicle. Accordingly, the coupling elements in the edge region can be located near the rear window, the windshield, or along the sides of the vehicle's longitudinal direction.

[0059] According to one embodiment, the disc assembly has a cover layer. The cover layer is arranged between the second disc element and the solar cell layer.

[0060] The cover layer acts as a lamination layer, positioned between the solar cell layer and the second disc element. For example, the cover layer is located between the solar cell layer and the output coupling element. The cover layer completely or at least partially covers the solar cell layer along its entire length from the direction of the vehicle interior. The cover layer, for example, completely or at least partially covers the solar cell elements.

[0061] A solar cell element, for example, has sharp edges that are concealed by the coating layer. In this context, a sharp edge means that the outer boundaries of the solar cell element are clearly visible to the human eye because they are not optically softened. The solar cell element is viewed from above, looking at the array of discs, or in other words, from a perpendicular perspective of the array's surface area. Conversely, a soft or blended edge means that it is barely or not at all perceptible to the human eye, resulting in a more aesthetically pleasing overall appearance.

[0062] The transitions at the edges of the solar cell elements are softened and / or concealed by the cover layer, resulting in a more visually appealing overall appearance. This makes the solar cell layer or elements less conspicuous, particularly from the perspective of a vehicle interior when the window arrangement is properly installed in a motor vehicle. Consequently, vehicle occupants are less likely to notice when the solar cell layer or elements are illuminated by the light-guiding element.

[0063] When the light guide element is switched off, the underside of the solar cell layer facing the vehicle interior appears neutral. The cover layer can have various finishes. For example, it can be black or another color to suit the vehicle user's preferences. A colored cover layer has the advantage of reducing the visual difference between areas with and without solar cell elements, resulting in a lower-contrast overall appearance that is more pleasing and enhances vehicle comfort.

[0064] The cover layer is, for example, positioned on the second plastic layer. For instance, the cover layer is positioned between the solar cell layer and the second plastic layer in such a way that it prevents the cover layer from potentially interfering with the light output. In this case, the cover layer neither couples light from the light-conducting second disk element nor absorbs it. The cover layer may also have a reflective surface facing the second disk element. Alternatively or additionally, an optical isolator is present, positioned between the second disk element and the cover layer.

[0065] If, for example, the coupling element is located on the third main surface of the second disk element, the coupling element does not wear down due to environmental influences and is protected by the internal arrangement.

[0066] The cover layer can be opaque, translucent, or semi-transparent. A semi-transparent cover layer is sufficient to facilitate the softening of the transitions at the edges of the solar cell element. Furthermore, a semi-transparent cover layer has the advantage of allowing as much sunlight as possible to enter the vehicle interior.

[0067] The cover layer optionally or additionally features a structure in the form of patterns or images, for example, leaves or company logos. A combination of light extraction and the structured cover layer results in the structure being highlighted. Preferably, the cover layer has a defined shape. Alternatively or additionally, the cover layer features specially shaped images that can be perceived by a vehicle occupant. By illuminating the cover layer with the light-guiding element, it is possible to illuminate and highlight structures embedded in the cover layer to achieve an optical effect. For example, a canopy of leaves can be simulated, increasing vehicle comfort for the occupants. Furthermore, company logos can also be generated in this way, subtly presented to visitors at automotive trade fairs or customers of car dealerships.Furthermore, this makes the solar cell elements even less noticeable.

[0068] Alternatively or additionally, the cover layer has structures for light extraction, so that additional light extraction elements can be dispensed with.

[0069] According to one embodiment, the carrier substrate is opaque.

[0070] For example, the carrier substrate can be used as a covering layer.

[0071] According to one embodiment, the window assembly, when installed, partially or completely forms one or more of the following vehicle elements: vehicle roof, windscreen, rear window.

[0072] In one embodiment, a window module for a vehicle comprises the window assembly. When installed, the window module partially or completely forms one or more of the following vehicle elements: the vehicle roof, the windshield, or the rear window. For example, the window module forms a vehicle roof that optionally extends forward and backward to form at least parts of the windshield and at least parts of the rear window. According to another example, the window module can form a rear window that extends onto the vehicle roof and at least partially forms a transparent vehicle roof.

[0073] According to one aspect, a vehicle roof has a configuration of the previously described window arrangement.

[0074] According to one embodiment, the disc assembly is part of a cover designed to close an opening in the top of a vehicle, forming at least a portion of the vehicle roof. The cover can, for example, be a glass cover, with the disc assembly forming part or a section of the cover. Alternatively, the disc assembly can also constitute the entire cover.

[0075] The cover can be fixed in the opening in the vehicle roof or be movable relative to the vehicle roof to allow the roof opening to be opened when needed. The window assembly can comprise the entire cover or a portion thereof. Alternatively, the window assembly can include the cover and the front and / or rear window.

[0076] Examples of the disclosure are explained in more detail below with reference to the schematic drawings.

[0077] They show: Fig. 1 a schematic representation of a part of a vehicle according to an exemplary embodiment, Fig. 2 to 10 schematic sectional views of a disc arrangement according to exemplary embodiments, Fig. Figures 11 to 14 are schematic top views of paint layers according to exemplary embodiments.

[0078] Elements of the same construction and function are marked across figures with the same reference symbols.

[0079] In this description, terms such as "top", "bottom", "upper side", "lower side", "inside" and "outside", "front" and "rear" refer to alignments and orientations as illustrated in the figures and as are common in a roadworthy motor vehicle.

[0080] Fig. Figure 1 shows a disc arrangement 1 for a vehicle 100, which, for example, forms a cover 102 in a vehicle roof 101. The cover 102 is designed to close a vehicle opening 103 in the vehicle roof 101. The disc arrangement 1 can form part or section of the cover 102 or alternatively, it can form the entire cover.

[0081] The vehicle 100 further comprises a rear window 104 and a windshield 105. A longitudinal direction L1 extends from the rear window 104 to the windshield 105. A transverse direction L2 lies perpendicular to the longitudinal direction L1. The transverse direction L2 extends from a first longitudinal side 106, which connects the rear window 104 and the windshield 105, to a second longitudinal side 107 opposite the first longitudinal side 106, which also connects the rear window 104 and the windshield 105. The first longitudinal side 106, the second longitudinal side 107, the rear window 104, and the windshield 105 enclose the vehicle roof 101, which has the window arrangement 1. A lateral extent area E1 is defined by the longitudinal direction L1 and the transverse direction L2.

[0082] The lateral extent surface E1 extends, for example, along the longitudinal direction L1 of the vehicle, as is typical for a roadworthy motor vehicle. The lateral extent surface E1 also extends, for example, along the transverse direction L2 of the vehicle, as is typical for a roadworthy motor vehicle. The extent surface E1 is, for example, curved in the longitudinal direction L1 and / or in the transverse direction L2.

[0083] The window assembly 1 is alternatively implemented as a roof window 108. Alternatively, the window assembly 1 can comprise a roof window 108 and a windshield 105, thus realizing a monolithic structure consisting of the windshield 105 and the roof window 108. Alternatively, the window assembly 1 can comprise a roof window 108 and a rear window 104, thus realizing a monolithic structure consisting of the rear window 104 and the roof window 108. In a further alternative embodiment, the window assembly 1 can comprise a roof window 108, a windshield 105, and a rear window 104, thus realizing a monolithic structure consisting of the windshield 105, rear window 104, and roof window 108.

[0084] Fig. Figure 2 shows an embodiment of the disc assembly 1 in a schematic side view. The disc assembly 1 has a first disc element 10 along a stacking direction S1. In its ready-to-use state, the first disc element 10 faces outwards and away from the interior of the vehicle 100. The first disc element 10 has a first main surface 11 and a second main surface 12 arranged opposite it. In its ready-to-use state, the first main surface 11 faces outwards. In its ready-to-use state, the second main surface 12 faces the interior of the vehicle 100. The second main surface 12 is arranged opposite the first main surface 11 along the stacking direction S1. The disc assembly 1 has a second disc element 20. The second disc element 20 has a third main surface 21 and a fourth main surface 22. The third main surface 21 faces the first disc element 10.The fourth main surface 22 is arranged opposite the third main surface 21 along the stacking direction S1. The first disk element 10 and the second disk element 20 are arranged according to the stacking direction S1 such that the third main surface 21 and the second main surface 12 are aligned with each other.

[0085] The four main surfaces 11, 12, 21, 22 are oriented in the same direction and spaced apart from each other. The four main surfaces 11, 12, 21, 22 are arranged parallel to each other, particularly within standard tolerances. The two disc elements 10, 20 extend, for example, substantially along the vehicle's transverse direction L2. However, the disc elements 10, 20 may also exhibit a curvature along the vehicle's transverse direction L2. The two disc elements 10, 20 extend, for example, substantially along the vehicle's longitudinal direction L1. However, the disc elements 10, 20 may also exhibit a curvature along the vehicle's longitudinal direction L1.

[0086] The first pane element 10 and the second pane element 20 are, for example, transparent glass panes. Pane elements 10 and 20 can alternatively or additionally be tinted. Alternatively or additionally, polycarbonate and / or polymethyl methacrylate (PMMA) panes are used.

[0087] Along the stacking direction S1, the first disk element 10 is arranged first, followed by a color layer 60, then a first plastic layer 40, and then a solar cell layer 30. The solar cell layer 30 has a fifth main surface 31 and a sixth main surface 32. The sixth main surface 32 is opposite the fifth main surface 31 along the stacking direction S1. The solar cell layer 30 is arranged between the first disk element 10 and the second disk element 20. Following the solar cell layer 30 along the stacking direction S1 are a second plastic layer 50 and the second disk element 20.

[0088] The first disc element 10 and the second disc element 20 are coupled to each other by means of the two plastic layers 40, 50. The plastic layers 40, 50 can be formed as films. The first plastic layer 40 and / or the second plastic layer 50 are, for example, formed as layers of polyvinyl butyral (PVB) or contain such a material. Alternatively or additionally, the two plastic layers 40, 50 are formed of or contain such a material as ethylene-vinyl acetate (EVA) and / or thermoplastic polyolefin (TPO) and / or polyolefin (PO) and / or thermoplastic polyurethane (TPU).

[0089] The first plastic layer 40 and / or the second plastic layer 50 can be multilayered, such that one of the sublayers is made of one of the materials described above. A further sublayer can also be made of one of the materials mentioned above or comprise a different material. The first plastic layer 40 and the second plastic layer 50 can be made of the same materials or of different materials.

[0090] The first plastic layer 40 and the second plastic layer 50 can include further functional layers that exhibit optically variable properties. For example, the functional layer can be used to switch its transparency and / or translucency (opacity), i.e., from high transparency to low transparency and / or high translucency to low translucency and vice versa. For this purpose, the functional layer may consist of, for example, liquid crystals (LC), in particular polymer-dispersed liquid crystals (PDLC), or other switchable materials. Such a glass pane arrangement 1 is also called smart glass.

[0091] The two plastic layers 40, 50 serve as a hot-melt adhesive layer to bond the first disk element 10 and the second disk element 20 together. The solar cell layer 30 is embedded between the two plastic layers 40, 50. The solar cell layer 30 is, for example, designed as a plate-shaped layer or comprises a multitude of spherical and / or organic solar cell elements 35.

[0092] The two disk elements 10, 20 and / or the solar cell layer 30 can be made of plastic and / or glass, or may contain both. For example, low-iron glass, in particular soda-lime glass, or plastic, such as polycarbonate, PMMA, acrylic glass, or similar material, is used as the glass material.

[0093] The disk elements 10, 20 and / or the solar cell layer 30 can be configured as a film. In this context, a film is a planar material that is flexible at least along its planar extent. The disk elements 10, 20 and / or the solar cell layer 30 can also be configured as plates. In this context, a plate is a planar, particularly rigid, material that essentially maintains its shape independently. The disk elements 10, 20 and / or the solar cell layer 30 can further comprise coatings or internal layers.

[0094] The disc elements 10, 20 and / or the solar cell layer 30 can be flat or curved in the three spatial directions. For example, the disc elements 10, 20 and / or the solar cell layer 30 are curved in the longitudinal direction of the vehicle L1 and / or in the transverse direction of the vehicle L2 and / or in the stacking direction S1.

[0095] The disk assembly 1 has the color layer 60. The color layer 60 is arranged between the first disk element 10 and the solar cell layer 30. The color layer 60 is, for example, arranged on the first disk element 10.

[0096] For example, the color layer 60 is based on inorganic pigments whose reflective properties allow everything behind the color layer 60 to appear colored. For instance, the solar cell layer 30 lies behind the color layer 60 along the stacking direction S1. The color layer 60 reflects a wavelength range from the light spectrum that corresponds to a defined color. Light that is not within the reflected wavelength range strikes the surface of the solar cell layer 30, thus generating electrical energy. In this context, the surface of the solar cell layer 30 is, for example, the fifth main surface 31. In this way, a color impression of a selected color is created, which is visible to an observer from the vehicle's exterior.

[0097] Alternatively, based on the morpho-butterfly effect, thin structures are applied as layer 60 to the second main surface 12 of the first disk element 10. These colored layers 60 are adjusted so that only one wavelength range of the incident light, for example sunlight, is reflected. The rest of the transmitted light spectrum falls on the surface of the solar cell layer 30 located below.

[0098] The color layer 60 can have various colors. Color layer 60 can exhibit a multitude of colors within its layer. For example, color layer 60 has a color transition along its extension surface E1. The color layer includes, for example, green, blue, yellow, red, or violet colors. This is not an exhaustive and therefore limiting list. The color layer can also include other colors. Alternatively, the color layer is a colored film. For example, color layer 60 is formed as a single layer in the form of a film and is arranged on the second main surface 12. Alternatively, the color pigments necessary for the production of color layer 60 are arranged within the first plastic layer 40. The first plastic layer 40, in turn, is arranged on the second main surface 12.

[0099] Fig. Figure 3 shows an embodiment of the disk arrangement 1 in a schematic side view. The disk arrangement 1 is the same as in Fig. 2 with the difference that the color layer 60 is arranged directly on the fifth main surface 31 of the solar cell layer 30.

[0100] Fig. Figure 4 shows an embodiment of the disk arrangement 1 in a schematic side view. The disk arrangement 1 is the same as in Fig. 3 with the difference that the color layer 60 is arranged on the sixth main surface 32, so that as much light as possible is absorbed by the solar cell layer 30 and then the remaining part of the light of a defined wavelength range is reflected. In this way, a color impression of a selected and predefined color is created.

[0101] Fig. Figure 5 shows an embodiment of the disk arrangement 1 in a schematic side view. The disk arrangement 1 is the same as in Fig. 2 with the difference that the solar cell layer 30 has the multitude of solar cell elements 35. In Fig. Figure 5 shows four solar cell elements 35 as an example. The solar cell layer 30 is not limited to four solar cell elements 30 and can have fewer or more than four solar cell elements 35. The disk arrangement 1 is not limited to a continuous solar cell layer 30. The solar cell layer 30 is, for example, interrupted and not continuous. There are, for example, gaps between the solar cell elements 35. Adjacent solar cell elements 35 are spaced apart from each other along the transverse direction L2 of the vehicle at a second distance L2. A solar cell element 35 is, for example, designed as a plate-shaped, spherical, and / or organic solar cell. The solar cell elements 35 are, for example, arranged next to each other and spaced apart from each other along the lateral extent surface E1.

[0102] The large number of laterally arranged solar cell elements 35 creates a semi-transparent disk arrangement 1. In this context, semi-transparent means that several solar cell elements 35, for example, form the solar cell layer 30. The solar cell layer 30 is, for example, interrupted and not continuous. Alternatively or additionally, the solar cell elements 35 are translucent.

[0103] The solar cell elements 35 can be made of plastic and / or glass, or may contain both. For example, low-iron glass, in particular soda-lime glass, or plastics such as polycarbonate, polymethyl methacrylate (PMMA), acrylic glass, or similar materials are used as glass materials.

[0104] The solar cell elements 35 can be designed, in particular, as a film. In this context, a film is a planar material that is flexible at least along its planar extent. The solar cell elements 35 can also be designed, in particular, as plates. In this context, a plate is a planar, in particular rigid, material that essentially maintains its shape independently. The solar cell elements 35 can further have coatings or internal layers. The solar cell elements 35 can be planar or curved in the three spatial directions. For example, the solar cell elements 35 are curved in the longitudinal direction L1 of the vehicle and / or in the transverse direction L2 of the vehicle and / or in the stacking direction S1.

[0105] Fig. Figure 6 shows an embodiment of the disk arrangement 1 in a schematic side view. The disk arrangement 1 is the same as in Fig. 2 with the difference that the color layer 60 has a multitude of color layer elements 65. The color layer 60 is, for example, interrupted and not continuous. There are, for example, gaps between the color layer elements 65. The disk arrangement 1 is not limited to a continuous color layer 60. The color layer elements 65 are, for example, arranged next to each other and spaced apart along the lateral extent surface E1. In Fig. Figure 6 shows four color layer elements 65 as examples. The color layer 60 is not limited to four color layer elements 60 and can have fewer or more than four color layer elements 65.

[0106] Adjacent color layer elements 65 are spaced apart along the vehicle transverse direction L2 at a distance d4 from each other.

[0107] Fig. Figure 7 shows an embodiment of the disk arrangement 1 in a schematic side view. The disk arrangement 1 is the same as in Fig. 6 with the difference that along the vehicle's longitudinal direction L1, adjacent color layer elements 65 are spaced apart by a third distance d3. Along the vehicle's longitudinal direction L1, adjacent solar cell elements 35 are spaced apart by a first distance d1. A combination of spaced color layer elements 65 in the vehicle's longitudinal direction L1 and vehicle's transverse direction L2 is also possible. A combination of spaced solar cell elements 35 in the vehicle's longitudinal direction L1 and vehicle's transverse direction L2 is also possible.

[0108] The third spacing d3 is less than or equal to the first spacing d1. The fourth spacing d4 is less than or equal to the second spacing d2. The color layer elements 65 cover the solar cell elements 35 along the stacking direction S1. The color layer elements 65 have a larger extent along the lateral extent area E1 than the solar cell elements 35.

[0109] The color layer elements 35 can be of the same color or different colors. The different colors can be arranged along the extension surface E1 in such a way that they represent a color transition. For example, the color layer elements 35 exhibit a color transition along the extension surface E1. The color layer elements 35 include, for example, green, blue, yellow, red, or violet colors. This is not an exhaustive and therefore limiting list. The color layer elements 35 can also include other colors.

[0110] Fig. Figure 8 shows an embodiment of the disk arrangement 1 in a schematic side view. The disk arrangement 1 is the same as in Fig. 6, with the difference that the disc arrangement 1 has a light-guiding element 25. The second disc element 20 is, for example, designed as a plate-shaped light-guiding element 25. The light-guiding element 25 is coupled to a light source 70 and is configured to guide light supplied by the light source 70 and provide it for a predetermined illumination of the vehicle interior. A transparent glass disc, such as white glass or clear glass, is used as the light-guiding element 25. Alternatively or additionally, a transparent plastic disc can be used. The light-guiding element 25 is coupled to a light source 70 via a coupling element 85. The coupling element 85 is, for example, a prism and is located directly adjacent to the fourth main surface 22 or is arranged at a distance from the fourth main surface 22. The coupling element 85 is, for example, arranged in an edge region of the second disc element 20.The light guide element 25 can direct light supplied by the light source 70. This ensures a predetermined illumination of the vehicle interior.

[0111] A decoupling element 90 is suitable for extracting light from the second disc element 20 in a defined section of the second disc element 20. The decoupling element 90 is, for example, arranged on the third main surface 21. The decoupling element 90 enables a defined extraction of light from the light guide element 25, thereby controlling the light output to illuminate the vehicle interior as efficiently as possible.

[0112] The decoupling element 90 can be realized, for example, by printing, masking, and / or stripping. The decoupling element 90 is, for instance, a transparent or translucent print to avoid an undesirable light appearance and to make it less noticeable to vehicle occupants.

[0113] The disk arrangement 1 is not limited to a single extraction element 90. For example, the disk arrangement 1 comprises a plurality of extraction elements 90 arranged side by side and spaced apart from one another along the lateral extension surface E1. The disk arrangement 1, for example, has a plurality of extraction elements 90 arranged according to a defined pattern. The extraction elements 90 are, for example, implemented as transparent, translucent, or semi-transparent extraction elements 90 and arranged such that they allow the extraction of light from the second disk element 20.

[0114] Fig. Figure 9 shows an embodiment of the disk arrangement 1 in a schematic side view. The disk arrangement 1 is the same as in Fig. 6 with the difference that the solar cell layer 30 has at least one support substrate 36. One or more solar cell elements 35 are arranged on the support substrate 36. In Fig. In Figure 9, two solar cell elements 35 are arranged on a support substrate 36. Alternatively, only one solar cell element 35 or more than two solar cell elements 30 can be arranged on a single support substrate 36. The support substrate 36, for example, provides electrical contact between the solar cell elements 35 and the vehicle's electrical system. The support substrate 36 may, for example, be made of copper or a copper alloy.

[0115] Fig. Figure 10 shows an embodiment of the disk arrangement 1 in a schematic side view. The disk arrangement 1 is the same as in Fig. 8, with the difference that the disc assembly has a cover layer 80. The cover layer 80 is arranged between the second disc element 20 and the solar cell layer 30. The cover layer 80 acts as a lamination layer, which is arranged, for example, between the first solar cell element 30 and the output coupling element 90. The cover layer 80 completely covers the solar cell layer 30 along its entire extent along the extension surface E1 from the direction of the vehicle interior. The cover layer 80 completely or at least partially covers, for example, the solar cell elements 35. The solar cell layer 30 or the solar cell elements 35 have, for example, hard transitions at their edges, which are laminated by means of the cover layer 80. Alternatively or additionally, the transitions at the edges of the solar cell elements 35 are softened by the cover layer 80, so that a more visually appealing overall impression is created.Thus, the solar cell element 35 is less conspicuous due to its structure and is less noticeable to vehicle occupants when illuminated by the light guide element 25.

[0116] When the light guide element 25 is switched off, the underside of the first solar cell element 30, which faces the vehicle interior, appears neutral. The cover layer 80 can have various properties. For example, the cover layer 80 is black or another color that meets the vehicle user's preferences. A colored cover layer 80 has the advantage of reducing the visual difference between areas with and without the solar cell elements 35, resulting in a lower-contrast overall appearance, which in turn provides a more pleasant visual impression and increases vehicle comfort.

[0117] The cover layer 80 is, for example, arranged on the second plastic layer 50. For instance, the cover layer 80 is positioned between the solar cell layer 30 and the second plastic layer 50 in such a way that the cover layer 80 does not interfere with the emission of light. In this case, the cover layer 80 neither emits light from the light-guiding second disk element 20 nor absorbs the light. The cover layer 80 also has, for example, a reflective surface that faces the second disk element 20. Alternatively or additionally, an optical isolator is present, which is arranged between the second disk element 20 and the cover layer 80.

[0118] The carrier substrate 36 can, for example, be used as a cover layer 80.

[0119] The embodiments in the Fig. Points 2 to 10 should not be considered in isolation or as limiting factors. The implementation formats can be advantageously combined.

[0120] Fig. Figures 11 to 14 show schematic top views along the stacking direction S1 of color layers 60 with color layer elements 65 according to embodiments.

[0121] Fig. Figure 11 shows a view along the stacking direction S1 from the outside of the vehicle.

[0122] Fig. Figure 12 shows a view from the vehicle interior opposite to the stacking direction S1. The individual solar cell elements 35 are covered by the color layer elements 65.

[0123] Fig. Figure 13 shows a view from the vehicle interior opposite to the stacking direction S1. The cover layer 80 covers the solar cell elements 35.

[0124] Fig. Figure 14 shows a view with light sources 70 and coupling elements 85.

[0125] The color layer elements 65 have a polygonal surface along the lateral extent surface E1. Alternatively, the color layer elements 65 have a circular surface along the lateral extent surface E1. Alternatively, the color layer elements 65 have an elliptical surface along the lateral extent surface E1. Alternatively, the color layer elements 65 have a combination of polygonal, circular, and elliptical surfaces. The color layer elements 65 can all have the same shape or be shaped differently. The size of the color layer elements 35 can also vary. Depending on their positioning in the disc arrangement 1 along the extent surface E1, a larger shape can be created from the individual color layer elements 65. By means of the variably adjustable shape of the color layer elements 65, areas in the disc arrangement 1 can be optimally filled and adapted to the customer's needs.

[0126] For the sake of clarity, the relative sizes of the individual components do not correspond to the true relative sizes of the disk arrangement 1. Reference symbol list 1. Disc arrangement 10 first disc element 11 first main area 12 second main area 20 second disc element 25 light guiding element 30 solar cell layers 31 fifth main area 32 sixth main area 35 solar cell elements 40 first plastic layer 50 second plastic layer 60 layers of paint 65 color layer element 70 light source 80 Cover layer 85 coupling element 90 Extraction element 100 vehicles 101 Vehicle roof 102 lids 103 Vehicle opening 104 Rear window 105 Windscreen 106 first side of vehicle 107 second side of vehicle 108 Roof disc S1 Stacking direction L1 Vehicle longitudinal direction L2 Vehicle transverse direction E1 lateral plane d1 first distance d2 distance between two d3 third distance d4 fourth distance

Claims

[1] Disc arrangement (1) for a vehicle (100), comprising - a first disk element (10) having a first principal surface (11) and a second principal surface (12) opposite the first principal surface (11) along a stacking direction (S1), - a second disk element (20) having a third principal surface (21) and a fourth principal surface (22) opposite the third principal surface (21) along the stacking direction (S1), wherein the second disk element (20) is coupled to the first disk element (10), - a solar cell layer (30) having a fifth principal surface (31) and a sixth principal surface (32) opposite the fifth principal surface (31) along the stacking direction (S1), wherein the solar cell layer (30) is arranged between the first disk element (10) and the second disk element (20), - a first plastic layer (40) arranged between the first disc element (10) and the solar cell layer (30), - a second plastic layer (50) arranged between the second disc element (20) and the solar cell layer (30), - a color layer (60) that is arranged between the first disk element (10) and the solar cell layer (30). [2] Disc arrangement (1) according to claim 1, wherein the solar cell layer (30) comprises a plurality of solar cell elements (35), wherein adjacent solar cell elements (35) are spaced apart from each other at a first distance (d1) along a longitudinal direction (L1) of the vehicle and at a second distance (d2) from each other along a transverse direction (L2) of the vehicle. [3] Disc arrangement (1) according to claim 2, wherein the paint layer (60) has a plurality of paint layer elements (65), wherein adjacent paint layer elements (65) are spaced apart from each other at a third distance (d3) along the longitudinal direction of the vehicle (L1) and at a fourth distance (d4) along the transverse direction of the vehicle (L2). [4] Disc arrangement (1) according to claim 3, wherein the third distance (d3) is less than or equal to the first distance (d1) and the fourth distance (d4) is less than or equal to the second distance (d2), such that the color layer elements (65) cover the solar cell elements (35) along the stacking direction (S1). [5] Disc arrangement (1) according to one of claims 3 or 4, wherein the plurality of color layer elements (65) have the same or different colors. [6] Disc arrangement (1) according to one of claims 3 to 5, wherein the color layer elements (65) have a polygonal and / or circular and / or elliptical surface. [7] Disc arrangement (1) according to one of the preceding claims, wherein the color layer (60) is arranged on the second main surface (12) of the first disc element (10). [8] Disc arrangement (1) according to one of the preceding claims, wherein the color layer (60) is arranged on the fifth main surface (31) of the solar cell layer (30). [9] Disc arrangement (1) according to one of claims 2 to 8, wherein the solar cell layer (30) has at least one support substrate (36) on which one or more of the plurality of solar cell elements (35) are arranged. [10] Disc arrangement (1) according to one of the preceding claims, wherein the second disc element (20) is designed as a plate-shaped light guide element (25) which is coupled to a light source (80) and is configured to guide light supplied by the light source (80) and to provide it for a predetermined illumination of the vehicle interior. [11] Disc arrangement (1) according to one of the preceding claims, comprising a cover layer (70) arranged between the second disc element (20) and the solar cell layer (30). [12] Disc arrangement (1) according to claim 9, wherein the support substrate (36) is opaque. [13] A window arrangement according to any of the preceding claims, which in the installed state partially or completely forms one or more of the following vehicle elements: vehicle roof (101), windscreen (105), rear window (104).

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