Composite pane assembly with electrical interference suppression member
Patent Information
- Application Number
- PCT/EP2025/055618
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-03-04
- Filing Date
- 2025-03-02
- Publication Date
- 2025-10-02
AI Technical Summary
Electro-optical functional elements integrated into composite panes act as antennas, unintentionally coupling high-frequency noise into the vehicle electrical system, disrupting antenna reception.
A composite pane assembly with a ribbon cable connected to a planar electrical functional element, featuring a connecting cable with an integrated interference suppressor, such as a ferrite core or a flat electrical component, to dampen high-frequency noise.
Effectively suppresses high-frequency interference signals, preventing them from entering the vehicle electrical system and ensuring reliable antenna reception.
Smart Images
Figure EP2025055618_02102025_PF_FP_ABST
Abstract
Description
[0001] Composite pane arrangement with electrical interference suppression element
[0002] The invention relates to a composite pane arrangement with an electrical interference suppression element, a method for producing the composite pane arrangement, and its use.
[0003] Composite panes usually consist of at least two rigid individual panes that are bonded together by a thermoplastic adhesive layer. Flexible ribbon cables, also called ribbon conductors or foil conductors, are widely used in vehicle construction, particularly to enable flexible electrical contact in confined spaces. In composite panes, the thickness of the thermoplastic adhesive layer is, for example, 0.76 mm. A ribbon cable suitable for this purpose has a total thickness of 0.3 mm. Such thin ribbon cables can therefore be easily embedded between the individual panes in the thermoplastic adhesive layer. The use of flexible ribbon cables in the automotive sector is described, for example, in DE 4235063 A1, DE 202004019286 U1 or DE 9313394 U1.
[0004] The use of flexible ribbon cables in composite panes with electro-optical functional elements is particularly well known. These are planar structures with electrically controllable optical properties of an active layer. This means that the optical properties of the active layer, and in particular its transparency and scattering behavior, can be controlled by an electrical voltage. Examples of electro-optical functional elements are SPD functional elements (SPD = Suspended Particle Device), known, for example, from EP 0876608 B1 and WO 2011033313 A1, and PDLC functional elements (PDLC = Polymer Dispersed Liquid Crystal), known, for example, from DE 102008026339 A1.
[0005] Electro-optical functional elements, such as SPD or PDLC functional elements, are commercially available as multilayer films, with the active layer arranged between two surface electrodes that are used to apply a voltage to control the active layer. Typically, the two surface electrodes are arranged between two carrier films, typically made of PET. Commercially available multilayer films are also covered on both sides with a protective film made of polypropylene or polyethylene, which serves to protect the carrier films from contamination or scratches. During production of the composite pane, the functional element is cut out of the multilayer film in the desired size and shape and inserted between the thermoplastic films of an intermediate layer, by means of which two panes are laminated together to form the composite pane.A typical application is windshields with electrically adjustable sun visors, which are known for example from DE 102013001334 A1, DE 102005049081 B3, DE 102005007427 A1 and DE 102007027296 A1.
[0006] The electrical contacting of electro-optical functional elements in composite panes is usually achieved via bus bars that are applied to the surface electrodes in the edge region of the functional element and form electrical contact with them. By connecting the bus bars to an external voltage source via a ribbon cable connected to the bus bars, a voltage can be applied to the surface electrodes and the active layer of the functional element can be switched. For more complex control tasks, ribbon cables equipped with multiple electrical conductors are used. The electrical conductors are very thin, with thicknesses ranging, for example, from 0.03 mm to 0.1 mm, and are made of copper, for example, which has proven itself due to its good electrical conductivity and easy processability, while at the same time keeping material costs low.
[0007] In the production of flexible ribbon cables, the electrical conductors are applied to a plastic carrier substrate, for example, using a printing process, and then covered with a plastic cover layer. Alternatively, the electrical conductors are prefabricated as metal strips made of metal foil and laminated on both sides with a plastic material. In both cases, the electrical conductors are mechanically stabilized and embedded in an insulating sleeve, thus providing electrical insulation from the external environment.
[0008] As a rule, the pane manufacturer requires a composite pane with a complete connection element, i.e. a composite pane with a ribbon cable partially laminated or integrated into the composite pane and a connection area of the ribbon cable located outside the composite pane for tool-free connection to additional control electronics is required.
[0009] When installed in a vehicle, the ribbon cable, which is partially integrated into the composite pane, is typically electrically connected at its free end to a connecting cable containing a plurality of round conductors or wires. The connecting cable, which can be designed, for example, in the form of a round cable, is electrically connected to control electronics for the electro-optical functional element of the composite pane. Such a ribbon cable, which is electrically connected to a connecting cable, can be found, for example, in WO 2023 / 052099 A1. The ribbon cable is flexible and can be easily bent in all directions and can therefore be easily brought to the control electronics and electrically connected to it. An electrical connection between the ribbon cable and the connecting cable is advantageously made via plug-in connections, which enable simple on-site assembly.
[0010] Now, practical experience has shown that electro-optical functional elements integrated into the composite pane, which contain flat electrical structures, can unintentionally act as antennas. Likewise, the flat ribbon cable itself can act as an antenna. These high-frequency interference signals, which are typically above 1 MHz and are also referred to as "high-frequency noise," can be coupled into the vehicle electrical system and have a very detrimental effect. In particular, the high-frequency noise can also reach an antenna amplifier, which is usually connected downstream of a vehicle antenna to receive antenna signals. This can significantly disrupt antenna reception.
[0011] It is known to dampen the high-frequency noise received by planar heating structures applied to the exterior of a window using a galvanically connected coil. For example, DE 20 201 1109444 U1 and DE 202018106646 U1 each show a connection element with a contact bridge, which is soldered with two contact feet to the conductor structure of the vehicle window heater, formed by a metal coating. The contact element comprises a coil, one end of which is electrically connected to the contact bridge, with the other end of which can be used to electrically connect to the vehicle electrical system. The coil acts as a suppressor for the unwanted high-frequency noise.
[0012] However, such a solution is not feasible for electro-optical functional elements integrated into the laminated pane, as such contact bridges with a galvanically connected coil cannot be laminated into the laminated pane. Therefore, they are only suitable for externally mounted, flat electrical structures.
[0013] In contrast, the object of the present invention is to provide an improved composite pane arrangement with a planar electrical functional element integrated into a composite pane and a ribbon cable electrically connected thereto, in which unwanted high-frequency noise received by the electrical functional element and optionally by the ribbon cable can be suppressed.
[0014] These and other objects are achieved according to the invention by a composite pane assembly having the features of the independent patent claim. A method for producing the composite pane assembly and its use are set out in the independent patent claims.
[0015] The invention relates to a composite pane arrangement comprising a composite pane, a (flat) electrical functional element, and a (flexible) ribbon cable connected to the electrical functional element, as well as a connecting cable electrically connected to the ribbon cable. The composite pane comprises a first pane and a second pane, which are firmly connected to one another via a thermoplastic intermediate layer. The electrical functional element is arranged between the two panes. The ribbon cable serves to electrically contact the electrical functional element in order to electrically connect the electrical functional element to a control system for its control / regulation.
[0016] The ribbon cable has a first ribbon cable connection region and a second ribbon cable connection region, wherein along an extension direction of the ribbon cable the first ribbon cable connection region is located at a first ribbon cable end and the second ribbon cable connection region is located at a second ribbon cable end of the ribbon cable.
[0017] The ribbon cable is partially laminated into the composite pane, with the first ribbon cable end, with the first ribbon cable connection area, located between the two panes, and the second ribbon cable end, with the second ribbon cable connection area, located outside the composite pane and extending out of the composite pane between the two panes. The electrical conductor tracks are in electrical contact with the electrical functional element in the first ribbon cable connection area and are preferably galvanically connected to it.
[0018] The connecting cable is electrically connected to the flexible ribbon cable and is located entirely outside the composite disc. The connecting cable has one or more cable strands. If multiple cable strands are provided, they are spatially separated from one another but together form the connecting cable. Multiple cable strands can also be spatially combined to form a common cable strand, with the connecting cable preferably being in the form of a round cable. Multiple cable strands can also be spatially combined to form a common cable strand in only one or more sections (i.e. section by section) (and the rest of the connecting cable can be spatially separated). The connecting cable comprises multiple round conductors or wires.
[0019] The connecting cable has a first connecting cable connection area at a first connecting cable end and a second connecting cable connection area at a second connecting cable end, wherein the first connecting cable connection area is electrically connected to the second ribbon cable connection area (located outside the composite pane) and the second connecting cable connection area is provided for electrical connection to control electronics for the electrical functional element. It is essential to the invention that the connecting cable has an electrical interference suppressor for damping high-frequency noise (i.e. high-frequency interference signals) between the first connecting cable connection area and the second connecting cable connection area. The interference suppressor thus serves to dampen high-frequency interference signals that are passed on through the connecting cable.
[0020] The interference suppressor advantageously enables the attenuation of high-frequency interference signals that are unintentionally received by the planar electrical functional element and the ribbon cable, both of which act as an antenna. Advantageously, the interference suppressor located in or on the connecting cable not only attenuates high-frequency interference signals received by the planar electrical functional element, but also high-frequency interference signals received by the ribbon cable. This reliably and safely prevents high-frequency interference signals from entering the vehicle electrical system, or attenuates them so strongly that interference is negligible. This applies in particular to high-frequency interference signals that can reach an antenna amplifier, which is typically connected downstream of a vehicle antenna for receiving antenna signals.A highly detrimental interference with antenna signals caused by amplified high-frequency noise can thus be avoided. This is a major advantage of the composite glazing assembly according to the invention. As will be apparent from the following explanations, the interference suppressor can be easily and space-savingly integrated into the technical environment. Existing composite glazing assemblies can be easily retrofitted.
[0021] According to a first alternative, the electrical interference suppression element is designed in the form of a ferrite core or standing wave filter arranged around the connecting cable. The ferrite core is preferably a foldable ferrite core, which facilitates attachment to the connecting cable. The ferrite core is attached to the outside of the connecting cable, i.e. is not galvanically connected to the connecting cable or its round conductors. The ferrite core is generally designed as a ferrite ring. Typically, the ferrite core contains a ceramic metal oxide, e.g. nickel-zinc ferrite or manganese-zinc ferrite, with high magnetic permeability and low electrical conductivity. The ferrite core acts like a choke with a very small number of turns and attenuates high-frequency interference signals that are transmitted by the connecting cable. A ferrite core can advantageously be attached to a connecting cable very easily.Existing connecting cables can be retrofitted easily and cost-effectively. If the connecting cable has multiple cable strands, it is advantageous to combine the cable strands in sections into a single cable strand, allowing the ferrite core to be positioned around the connecting cable.
[0022] In a second alternative, the electrical interference suppression element is designed as a flat electrical component that is galvanically connected to the round conductors of the connecting cable. The flat electrical component contains an inductance for each round conductor, optionally combined with a capacitance. Designing the interference suppression element as a flat component enables particularly space-saving integration of the interference suppression element into the connecting cable.
[0023] For this purpose, the connecting cable has an electrical interruption, forming a first connecting cable section and a second connecting cable section, with the electrical flat component being electrically connected in series with the two connecting cable sections at the electrical interruption (i.e., with an electrical flat component interposed between them). The electrical flat component is advantageously electrically connected to the two connecting cable sections by a conventional "wire-to-board" connection, such as a plug-in connection, selected from a socket or plug, or by soldering or crimping. Such an interference suppression element can achieve particularly effective attenuation of high-frequency interference signals for each round conductor of the connecting cable.Preferably, the electrical component comprises a printed circuit board (PCB) with soldered electrical components, wherein the electrical components comprise an inductance for each round conductor, optionally in combination with a capacitor. The printed circuit board with soldered electrical components is encased in a capsule made of an electrically insulating material, thereby providing good protection against external environmental influences, such as moisture.
[0024] It is also conceivable that the electrical flat component is a so-called "surface-mounted component," also known as an "SMD" (surface-mounted device). SMDs are well known to those skilled in the electronics industry from the series production of populated circuit boards, so they need not be discussed in detail here. The SMD flat component has a housing, whereby an electrical connection to the two connecting cable sections (with an SMD flat component interposed) can be made via two solder connections arranged on one or more sides of the housing or on the underside of the housing. The housing of the SMD flat component advantageously has a prismatic shape, particularly a cuboid shape, or a cylindrical shape. This enables a particularly compact and space-saving design of the connecting cable.
[0025] In general, a (flexible) ribbon cable is a flat body with two opposite sides that can be made either flat or curved. In the flat (i.e., non-curved) state, the ribbon cable is arranged in one plane. The ribbon cable is generally elongated and has two ends along its direction of extension. The electrical conductor tracks are arranged next to one another, at least in sections, along the direction of extension of the ribbon cable. Each electrical conductor track can be electrically contacted at two contact points spaced apart from one another along the conductor track. The contact points are areas of the conductor tracks where electrical contact is possible. In the simplest embodiment, these are accessible areas of the electrical conductor tracks.
[0026] The first ribbon cable connection area has a contact point for at least one of the electrical conductor tracks. The second ribbon cable connection area is typically, but not necessarily, located on the same side as the first ribbon cable connection area of the ribbon cable. The at least one second ribbon cable connection area has a contact point for at least one of the electrical conductor tracks. The ribbon cable connection areas of the ribbon cable serve to electrically contact the conductor tracks. For this purpose, any insulating sheath is absent or removed at least at the contact points, so that the electrical conductor tracks are accessible.
[0027] According to one embodiment of the ribbon cable, the electrical conductor tracks are applied to an electrically insulating carrier substrate and thus firmly connected to the carrier substrate. For example, the carrier substrate is coated with the electrical conductor tracks, in particular by a printing process, for example a screen printing process. In addition, the electrical conductor tracks are covered by an electrically insulating cover layer. The carrier substrate and the cover layer together form an insulating sleeve which encloses the electrical conductor tracks. In this embodiment, the first ribbon cable connection region and the second ribbon cable connection region preferably have no insulating layer only on the side facing away from the carrier substrate, at least at the contact points, i.e. the cover layer is removed there, e.g. provided with one or more openings (perforations).It is also possible that the electrical conductor tracks are prefabricated, for example as strips of metal foil, and laminated between two insulation layers of electrically insulating material, which together form an insulating sheath that embeds the electrical conductor tracks.
[0028] The electrical conductors of the ribbon cable preferably contain or consist of a metallic material, such as copper, aluminum, stainless steel, tin, gold, silver, or alloys thereof. If the electrical conductors are manufactured as strips of metal foil, the metal can be partially or completely tinned. This is particularly advantageous for achieving good solderability while simultaneously providing corrosion protection. Furthermore, contacting is improved with an electrically conductive adhesive.
[0029] According to one embodiment, the electrical conductor tracks have a thickness of 10 pm to 300 pm, preferably from 30 pm to 250 pm and in particular from 50 pm to 150 pm. Such thin conductors are particularly flexible and can, for example, be easily laminated into and led out of composite panes. According to one embodiment, the electrical conductor tracks have a width of 0.1 mm to 100 mm, in particular from 1 mm to 50 mm and in particular from 10 mm to 30 mm. Such widths are particularly suitable for achieving sufficient current-carrying capacity in conjunction with the above-mentioned thicknesses. The width of the ribbon cable can be constant or vary. In particular, the ribbon cable can be widened in the first connecting cable connection area and / or the second connecting cable connection area.
[0030] In an advantageous embodiment of the ribbon cable, it has a length of 5 cm to 150 cm, preferably 10 cm to 100 cm, and in particular 50 cm to 90 cm. It goes without saying that the length, width, and thickness of the ribbon cable can be adapted to the requirements of each individual case. The direction of the length defines the extension direction of the ribbon cable.
[0031] The ribbon cable has an insulating layer on one or both sides, which is designed, for example, in the form of an insulating film. The insulating layer is firmly connected to the electrical conductor tracks and, for example, glued. The insulating layer preferably contains or consists of polyimide or polyester, particularly preferably polyethylene terephthalate (PET) or polyethylene naphthalate (PEN). The insulating layer can also consist of an electrically insulating varnish, preferably a polymer varnish. The insulating layer can also contain or consist of thermoplastics and elastomers such as polyamide, polyoxymethylene, polybutylene terephthalate, or ethylene-propylene-diene rubber. Alternatively, potting materials such as acrylate or epoxy resin systems can be used as the insulating layer. The insulating layer preferably has a thickness of 10 μm to 300 μm, particularly preferably of 25 μm to 200 μm, and in particular of 60 μm to 150 μm.The insulation layer is bonded to the conductor tracks, for example, via an adhesive layer. The thickness of the adhesive layer is, for example, from 10 μm to 150 μm, and particularly preferably from 50 μm to 75 μm. Such insulation layers are particularly suitable for electrically insulating and mechanically stabilizing the conductor tracks, as well as protecting them from mechanical damage and corrosion. Such ribbon cables are so thin that they can be easily embedded between the individual panes in the thermoplastic intermediate layer of a composite pane and led out of it. The ribbon cable is therefore particularly suitable for contacting flat electrical functional elements in composite panes.
[0032] It is understood that the connecting cable termination areas can be protected against corrosion by an electrically conductive coating, such as tin plating, or an electrically non-conductive layer, such as solder resist. This protective layer is usually removed, burned, or otherwise penetrated only during electrical contacting to enable electrical contact. Insulation-free connecting cable termination areas can be created using windowing techniques during production or by subsequent removal, for example, by laser ablation or mechanical removal.
[0033] The ribbon cable connection areas are designed according to their respective use. In an advantageous embodiment, the contact points are designed as solder contact points. The electrical connection between the first ribbon cable connection area of the ribbon cable and the planar electrical functional element is preferably made by soldering, bonding, or welding. When soldering, soft soldering with a low-melting solder is preferred. Alternatively, the electrically conductive connection can be made by gluing with an electrically conductive adhesive or clamping, for example by means of a metallic clip, sleeve, or plug connection. Inside the composite pane, the electrical connection can also be made by direct contact between the electrically conductive areas; this arrangement is firmly laminated into the composite pane and thus secured against slipping.
[0034] Advantageously, the ribbon cable is provided with an electrode array in the first ribbon cable connection area, comprising a plurality of (individual) electrodes that are electrically connected to the conductor tracks. This enables simple electrical contacting of the electrical functional element for its specific control / regulation.
[0035] The connecting cable comprises a plurality of round conductors (wires), each surrounded by an insulating sheath made of an electrically insulating material. The connecting cable comprises one or more cable strands that are spatially separated from one another and together form the connecting cable. The cable strands can be joined together in sections, in particular in order to arrange a ferrite core around the joined cable strands. The ferrite core can be arranged equally easily around a connecting cable in the form of a round cable.
[0036] For the purposes of the invention, a cable harness is a spatial bundle of round conductors, wherein the round conductors can be held together by a cable harness sheath. The connecting cable is flexible and can be formed into either a flat or curved shape. The connecting cable is generally elongated and has two ends along its extension direction. The round conductors are arranged next to one another in the cable harness, at least in sections. Each round conductor can be electrically contacted at two contact points spaced apart along the round conductor. The contact points are areas of the round conductor where electrical contact is possible. In the simplest embodiment, these are accessible areas of the round conductor.
[0037] The first connecting cable connection area has a contact point for at least one of the round conductors. The at least one second connecting cable connection area has a contact point for at least one of the round conductors. The connecting cable connection areas of the connecting cable serve to electrically contact the round conductors. For this purpose, the insulating sheath is absent or removed at least at the contact points, so that the round conductors are accessible. The connecting cable connection areas are designed according to their respective use. In an advantageous embodiment, the contact points are designed as solder contact points.
[0038] The round conductors of the connecting cable preferably contain or consist of a metallic material, such as copper, aluminum, stainless steel, tin, gold, silver, or alloys thereof. The length of the connecting cable depends on the specific circumstances.
[0039] In an advantageous embodiment, the ribbon cable has at least one connector, selected from a socket or plug, for electrical connection to the connecting cable, with the connecting cable having a corresponding counterpart, selected from a socket or plug. This enables a particularly simple connection between the ribbon cable and the connecting cable. Complex solder connections for electrical contact can be advantageously dispensed with.
[0040] In an advantageous embodiment, the connecting cable has at least one connector, selected from a socket or plug, for electrically connecting to a control electronics system for controlling / regulating the planar electrical functional element. This enables a particularly simple connection between the connecting cable and the control electronics. Complex solder connections for electrical contact can be advantageously dispensed with.
[0041] Such a connector is intended for mechanical plug-in connection with a connecting counterpart, wherein the connecting counterpart is a plug if the connecting piece is a socket, and vice versa. The connecting piece and the connecting counterpart are each provided with electrical connection means which come into electrical contact when the plug-in connection is created. If the connecting piece and the connecting counterpart are plugged into each other, a positive and / or non-positive mechanical connection is formed between the connecting piece and the connecting counterpart. For such a plug-in connection, a plug-in opening is provided, for example, in the connecting piece, which in this case is a socket, into which the connecting counterpart designed as a plug is plugged.Conversely, it is equally possible for the mating connector to have a plug-in opening, which in this case is a socket into which the connector designed as a plug is inserted. Both the socket and the plug are electrical components, each having a housing. Conventional, commercially available electrical housing components can be used for the plug and socket used as the connector and mating connector, with the electrical connection means being designed, for example, in the form of pins and receptacles. When the plug connection is formed between the plug and socket, the pins come into electrical contact with the electrical receptacles.
[0042] In the ribbon cable and / or connecting cable, a plurality of connecting pieces or connecting counterparts can be arranged next to one another in a row.
[0043] In one embodiment, a plug-in direction for forming the plug-in connection between the connector and the counterpart of the ribbon cable and the connecting cable is identical to the extension direction of the ribbon cable. With respect to the extension direction of the ribbon cable toward the second ribbon cable end, the plug-in direction is identical or opposite. This embodiment thus corresponds to a "straight" configuration, which can also be referred to as a T-configuration if the connectors result in a widening of the ribbon cable. A connecting cable, particularly a round cable, electrically connected to the ribbon cable runs in the same direction as the ribbon cable, meaning that the electrical plug-in connection does not change the direction of the cable. However, a running of the connecting cable in the opposite direction, parallel to the ribbon cable, is also possible.Here, the route of the connecting cable through the electrical plug connection is rotated by 180° relative to the route of the ribbon cable, i.e. the direction of the cable route is inverted. Alternatively, it is also possible for an angle between the plug-in direction for forming the plug connection and the extension direction of the ribbon cable (e.g., relative to a direction toward the second ribbon cable end) to be in the range between greater than 0° and less than 180°, and in particular to be 90°. This configuration can also be referred to as an L-configuration if the route of a connecting cable connected to the ribbon cable, in particular a round cable, is rotated by 90° relative to the route of the ribbon cable.
[0044] These designs allow a multitude of different configurations to be formed and thus also to increase the application possibilities of the composite disc arrangement, in particular with regard to the spatial requirements and the route of the connecting cable, in particular the round cable, which is electrically connected to the ribbon cable.
[0045] The composite pane assembly according to the invention comprises a composite pane with a planar electrical functional element arranged inside the composite pane. The electrical functional element can be any planar electrical structure that performs an electrical function and requires control / regulation by an external control electronics, so the use of a ribbon cable with a plurality of conductor tracks is technically feasible.
[0046] The planar electrical functional element is preferably a layer (electrical functional layer) that is advantageously large in area, electrically conductive, and advantageously transparent to visible light, as described above. The electrical functional layer or a carrier film with the electrical functional layer can be arranged on a surface of an individual pane. For example, the electrical functional layer is located on an inner surface of one and / or the other pane. Alternatively, the electrical functional layer can be embedded between two thermoplastic films of the intermediate layer. The electrical functional layer is then preferably applied to a carrier film or carrier pane. The carrier film or carrier pane preferably contains a polymer, in particular polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), polyurethane (PU), polyethylene terephthalate (PET), or combinations thereof.
[0047] The electrical functional layer is preferably arranged on a surface of at least one pane and partially covers or overlaps the surface of the pane, but preferably over a large area. The term "large area" means that at least 50%, at least 60%, at least 70%, at least 75%, or preferably at least 90% of the surface of the pane is covered by the functional layer. However, the functional layer can also extend over smaller portions of the surface of the pane. The functional layer is preferably transparent to visible light. In an advantageous embodiment, the functional layer is a single layer or a layer structure comprising several individual layers with a total thickness of less than or equal to 2 μm, particularly preferably less than or equal to 1 μm.
[0048] For the purposes of the present invention, "transparent" means that the total transmission of the glazing complies with the legal requirements for windshields and front side windows and preferably has a visible light transmittance of more than 70%, and in particular more than 75%. For rear side windows and rear windows, "transparent" can also mean 10% to 70% light transmission. Accordingly, "opaque" means a light transmission of less than 15%, preferably less than 5%, and in particular 0%.
[0049] For example, the electrical functional layer contains at least one metal, preferably silver, nickel, chromium, niobium, tin, titanium, copper, palladium, zinc, gold, cadmium, aluminum, silicon, tungsten, or alloys thereof, and / or at least one metal oxide layer, preferably tin-doped indium oxide (ITO), aluminum-doped zinc oxide (AZO), fluorine-doped tin oxide (FTO, SnO2:F), or antimony-doped tin oxide (ATO, SnO2:Sb). Transparent, electrically conductive layers are known, for example, from DE 20 2008 017 611 U1 and EP 0 847 965 B1. They consist, for example, of a metal layer such as a silver layer or a layer of a silver-containing metal alloy. Typical silver layers preferably have thicknesses of 5 nm to 15 nm, particularly preferably of 8 nm to 12 nm. The metal layer can be embedded between at least two layers of dielectric material of the metal oxide type.The metal oxide preferably contains zinc oxide, tin oxide, indium oxide, titanium oxide, silicon oxide, aluminum oxide, or the like, as well as combinations of one or more thereof. The dielectric material may also contain silicon nitride, silicon carbide, aluminum nitride, or combinations of one or more thereof. The layer structure is generally obtained by a sequence of deposition processes carried out by a vacuum process such as magnetic field-assisted sputtering or by chemical vapor deposition (CVD). Very fine metal layers, particularly containing titanium or niobium, may also be provided on both sides of the silver layer. The lower metal layer serves as an adhesion and crystallization layer. The upper metal layer serves as a protective and getter layer to prevent any changes in the silver during subsequent process steps.
[0050] Transparent, electrical functional layers preferably have a surface resistance of 0.1 ohm / square to 200 ohm / square, particularly preferably from 1 ohm / square to 50 ohm / square and most particularly preferably from 1 ohm / square to 10 ohm / square.
[0051] The electrical functional layer is preferably an electrically heatable layer, which provides the composite pane with a heating function. Such heatable layers are known per se to those skilled in the art. They typically contain one or more, for example two, three or four, electrically conductive layers. These layers preferably contain or consist of at least one metal, for example silver, gold, copper, nickel and / or chromium, or a metal alloy and preferably contain at least 90 wt.% of the metal, in particular at least 99.9 wt.% of the metal. Such layers have particularly advantageous electrical conductivity with simultaneous high transmission in the visible spectral range. The thickness of an individual layer is preferably from 5 nm to 50 nm, particularly preferably from 8 nm to 25 nm.With such a thickness, an advantageously high transmission in the visible spectral range and a particularly advantageous electrical conductivity are achieved.
[0052] The planar electrical functional element can equally preferably be an electro-optical component, such as an SPD element or PDLC element, as described above. These are known per se to the person skilled in the art, so they need not be explained in more detail. The electrical functional layer can also be a polymeric electrically conductive layer, for example, containing at least one conjugated polymer or a polymer provided with conductive particles.
[0053] Electro-optical components, such as SPD or PDLC elements, are commercially available as multilayer films, with the active layer arranged between two surface electrodes that are used to apply a voltage to control the active layer. Typically, the two surface electrodes are arranged between two carrier films, typically made of PET. Commercially available multilayer films are also covered on both sides with a protective film made of polypropylene or polyethylene, which serves to protect the carrier films from contamination or scratches. During production of the composite pane, the electro-optical component is cut out of the multilayer film in the desired size and shape and inserted between the films of an intermediate layer, by means of which two panes are laminated together to form the composite pane.A typical application is windshields with electrically adjustable sun visors, which are known for example from DE 102013001334 A1, DE 102005049081 B3, DE 102005007427 A1 and DE 102007027296 A1.
[0054] In the composite pane arrangement according to the invention, the electrical functional element is advantageously electrically connected to at least two bus bars through which a current can be conducted. The bus bars are preferably arranged in the edge region of the electrical functional element. The length of the bus bar is typically substantially equal to the length of the respective side edge of the electrical functional element, but can also be somewhat longer or shorter. Preferably, two bus bars are arranged in the edge region along two opposite side edges of the functional element. The width of the bus bar is preferably from 2 mm to 30 mm, particularly preferably from 4 mm to 20 mm. The bus bars are typically each designed in the form of a strip, with the longer dimension being referred to as the length and the shorter dimension as the width.Such bus bars are designed, for example, as printed and fired-in conductive structures. The printed bus bar contains at least one metal, preferably silver. The electrical conductivity is preferably achieved via metal particles contained in the bus bar, particularly preferably via silver particles. The metal particles can be located in an organic and / or inorganic matrix such as pastes or inks, preferably as a fired screen printing paste with glass frits. The layer thickness of the printed bus bar is preferably from 5 pm to 40 pm, particularly preferably from 8 pm to 20 pm, and most preferably from 10 pm to 15 pm. Printed bus bars with these thicknesses are technically simple to realize and have an advantageous current-carrying capacity. Alternatively, the bus bar can also be designed as a strip of electrically conductive foil.The bus bar then contains, for example, at least aluminum, copper, tinned copper, gold, silver, zinc, tungsten and / or tin or alloys thereof. The strip preferably has a thickness of 10 pm to 500 pm, particularly preferably 30 pm to 300 pm. Bus bars made of electrically conductive foils with these thicknesses are technically simple to produce and have advantageous current-carrying capacity. The strip can be electrically connected to the electrically conductive structure, for example, via a solder compound, via an electrically conductive adhesive, or by direct application. If the electrical functional element has such bus bars, the flat conductor is electrically connected to the two bus bars.
[0055] The composite pane of the connection arrangement according to the invention comprises a first pane and a second pane, which are preferably made of glass, particularly preferably of soda-lime glass, as is common for window panes. However, the panes can also be made of other types of glass, for example quartz glass, borosilicate glass, or aluminosilicate glass, or of rigid, clear plastics, for example polycarbonate or polymethyl methacrylate. The panes can be clear or tinted or colored. If the composite pane is used as a windshield, it should have sufficient light transmission in the central viewing area, preferably at least 70% in the main viewing area A according to ECE-R43. The first pane and the second pane can also be referred to as the outer and inner panes.
[0056] The first pane, the second pane and / or the intermediate layer may have further suitable coatings known per se, for example anti-reflective coatings, non-stick coatings, anti-scratch coatings, photocatalytic coatings or sun protection coatings or low-E coatings.
[0057] The thickness of the first pane and the second pane can vary widely and thus be adapted to the requirements of the individual case. The first pane and the second pane advantageously have standard thicknesses of 0.7 mm to 25 mm, preferably from 1.4 mm to 2.5 mm for vehicle glass and preferably from 4 mm to 25 mm for furniture, appliances and buildings, in particular for electric radiators. The size of the panes can vary widely and depends on the size of the application according to the invention. The first and second panes have areas of 200 cm, which are common in vehicle construction and architecture, for example. 2 up to 20 m 2on.
[0058] The invention further extends to a method for producing a composite pane arrangement according to the invention (as described above), comprising the following steps: a) providing a composite pane comprising a first pane and a second pane, which are bonded to one another via a thermoplastic intermediate layer, wherein an electrical functional element is arranged between the two panes, wherein the composite pane comprises a ribbon cable with electrical conductor tracks, wherein the ribbon cable has a first ribbon cable connection area at a first ribbon cable end and a second ribbon cable connection area at a second ribbon cable end, wherein the first ribbon cable connection area is arranged between the two panes and the second ribbon cable connection area is led out of the composite pane between the two panes,and wherein the electrical conductor tracks in the first ribbon cable connection region electrically contact the electrical functional element, b) producing a connecting cable with one or more cable strands, wherein the connecting cable comprises a plurality of round conductors, wherein the connecting cable has a first connecting cable connection region at a first connecting cable end and a second connecting cable connection region at a second connecting cable end, wherein the connecting cable has an electrical interference suppressor for dampening high-frequency noise between the first connecting cable connection region and the second connecting cable connection region, c) electrically connecting the first connecting cable connection region to the second ribbon cable connection region, wherein the second connecting cable connection region is provided for electrical connection to a control electronics for the electrical functional element.
[0059] In step b), the connecting cable is manufactured such that the electrical interference suppression element is i) a ferrite core arranged around the connecting cable, or ii) an electrical flat component galvanically connected to the round conductors of the connecting cable, wherein the connecting cable has an electrical interruption, whereby a first connecting cable section and a second connecting cable section are formed, wherein the electrical flat component is electrically connected in series to the two connecting cable sections at the electrical interruption, wherein the electrical flat component contains an inductance for each round conductor, optionally in combination with a capacitance.
[0060] Steps a), b), c) and d) can be carried out in any order, as long as this is reasonable.
[0061] According to an advantageous embodiment of the method according to the invention, after providing the composite pane with a partially laminated ribbon cable and producing the connecting cable, a plug connection is formed between the ribbon cable and the connecting cable, consisting of a connecting piece with a respective connecting counterpart. Specifically, the first connecting cable connection area is electrically connected to the second ribbon cable connection area by a plug connection. The second connecting cable connection area is provided for electrical connection to a control electronics system for the electrical functional element.
[0062] According to an advantageous embodiment of the method according to the invention, the interference suppression element is electrically connected to the first connecting cable connection area and the second connecting cable connection area by a respective plug connection, wherein the plug connection is formed in each case from a connecting piece and a corresponding connecting counterpart. Alternatively, solder or crimp connections can be provided.
[0063] When producing the composite pane with the partially laminated ribbon conductor, the two individual panes are preferably joined under the influence of heat, vacuum and / or pressure. Known processes for producing a composite pane can be used. For example, so-called autoclave processes can be carried out at an elevated pressure of approximately 10 bar to 15 bar and temperatures of 130 °C to 145 °C for approximately 2 hours. Known vacuum bag or vacuum ring processes operate, for example, at approximately 200 mbar and 80 °C to 110 °C. The first pane, the thermoplastic intermediate layer and the second pane with the ribbon conductor sandwiched between them can also be pressed into a pane in a calender between at least one pair of rollers. Systems of this type are known for producing panes and normally have at least one heating tunnel upstream of a pressing plant.The temperature during the pressing process, for example, ranges from 40°C to 150°C. Combinations of calendering and autoclaving processes have proven particularly effective in practice. Alternatively, vacuum laminators can be used. These consist of one or more heatable and evacuatable chambers in which the first and second sheets are laminated within, for example, approximately 60 minutes at reduced pressures of 0.01 mbar to 800 mbar and temperatures of 80°C to 170°C.
[0064] The invention further extends to the use of the composite pane arrangement according to the invention as glazing for vehicles, aircraft, or ships, preferably as vehicle glazing, in particular as a windshield, roof, rear, or side window of a motor vehicle. The various embodiments of the invention can be implemented individually or in any desired combinations. In particular, the features mentioned above and explained below can be used not only in the specified combinations, but also in other combinations or on their own, without departing from the scope of the present invention. Features of the connection arrangement according to the invention can equally be implemented in the method according to the invention for producing the connection arrangement, and vice versa.
[0065] The invention is explained in more detail below using exemplary embodiments, with reference to the accompanying figures. Identical or equivalent elements are provided with the same reference numerals. They show, in a simplified representation, not to scale:
[0066] Figure 1 is a schematic perspective view of an embodiment of the composite pane arrangement according to the invention,
[0067] Figure 2 shows a section of the composite disc arrangement in the area of the transition from the ribbon cable to the connecting cable of Figure 1 in a detailed view,
[0068] Figure 3 is a schematic perspective view of the composite pane in the composite pane arrangement of Figure 1 with ribbon cable,
[0069] Figure 4 is a plan view of an exemplary design of the ribbon cable,
[0070] Figure 5 is a plan view of an exemplary embodiment of the
[0071] Round cable connection cable,
[0072] Figure 6 shows the ribbon cable of Figure 4 and the round cable of Figure 5 in the connected state,
[0073] Figure 7 the round cable of Figure 5 with a ferrite core,
[0074] Figure 8 shows the connecting cable of Figure 2 with an electrical flat component,
[0075] Figure 9 is a flowchart illustrating the method according to the invention. Reference is first made to Figures 1 to 3, in which a composite pane assembly, designated overall by reference numeral 1, is schematically illustrated using perspective views. Figure 1 shows the composite pane assembly from above, Figure 2 shows an oblique view, and Figure 3 shows the composite pane of the composite pane assembly.
[0076] The composite pane arrangement 1 comprises a composite pane, designated overall by the reference numeral 2, which is designed here, for example, as a windshield of a motor vehicle. As shown in Figure 3, the composite pane 2 comprises a first pane 3 as the outer pane and a second pane 4 as the inner pane. The inner pane is the pane facing the vehicle interior, while the outer pane faces the vehicle's surroundings. The two panes 3, 4 are made, for example, of soda-lime glass. The two panes 3, 4 are firmly connected to one another by a thermoplastic intermediate layer 5, for example made of polyvinyl butyral (PVB), ethylene-vinyl acetate (EVA), or polyurethane (PU). The composite pane 2 comprises a planar electrical functional element 6 (not shown in detail), which is located between the two panes 2, 3.The electrical functional element 6 here is, for example, a PDLC element, which serves, for example, as an electrically adjustable sun visor mounted in an area above the central viewing area B (as defined in ECE-R43). The PDLC element is formed by a commercially available PDLC multilayer film embedded in the thermoplastic intermediate layer 5. For this purpose, the thermoplastic intermediate layer 5 comprises, for example, a total of three thermoplastic films (not shown) with a thickness of, for example, 0.38 mm made of PVB, wherein a first thermoplastic film is connected to the first pane 3 and a second thermoplastic film is connected to the second pane 4, and wherein an intermediate thermoplastic frame film has a cutout into which the cut-to-size electrical functional element 6 is precisely inserted.The third thermoplastic composite film forms a kind of passe-partout for the electrical functional element 6, which is thus completely encapsulated in thermoplastic material and thus protected. This embedding of the PDLC element in a composite pane 2 is well known to those skilled in the art, so a detailed description is unnecessary and need not be discussed in detail here.
[0077] As is also known to those skilled in the art, the PDLC element comprises an active layer between two surface electrodes and two carrier films. The active layer contains a polymer matrix with liquid crystals dispersed therein, which align themselves depending on the electrical operating voltage applied to the surface electrodes, thereby allowing the optical properties to be controlled. In the aligned state, relatively little light scattering occurs, so that the PDLC element is transparent or translucent. In the non-aligned state, relatively strong light scattering occurs, and the PDLC element is opaque.
[0078] The two surface electrodes of the electrical functional element 6 can each be connected to the vehicle's on-board electrical system via bus bars (not shown) and a ribbon cable 7 connected to the bus bars, as well as a connecting cable 16. In an exemplary embodiment, the connecting cable 16 has two separate or spatially separated cable harnesses 17, 18 (see Figure 2), i.e., a first cable harness 17 and a second cable harness 18. The two spatially separated cable harnesses 17, 18 together form the connecting cable 16 within the meaning of the invention.
[0079] The connecting cable 16 can equally be designed in the form of a single round cable (see Figure 5), in which the two cable strands 17, 18 are spatially joined together. It is understood that the two cable strands 17, 18 in the round cable remain electrically separated from one another. The connecting cable 16 has a plurality of round conductors 31, e.g., in the form of wires, which are electrically separated from one another.
[0080] As illustrated in Figure 3, the ribbon cable 7 is partially laminated into the composite pane 2 and led out of the composite pane 2 between the two panes 3, 4. The ribbon cable 7 has a first ribbon cable connection region 10 and a second ribbon cable connection region 11, wherein along an extension direction of the ribbon cable 7, the first ribbon cable connection region 10 is located at a first ribbon cable end 8 and the second ribbon cable connection region 11 is located at a second ribbon cable end 9 of the ribbon cable 7.
[0081] The ribbon cable 7 has a plurality of conductor tracks 14 which are arranged next to one another on a carrier foil 29 and which open in the first ribbon cable connection area 10 into an electrode field 15 with a plurality of (individual) electrodes 30 for electrical (e.g. galvanic) contacting of the electrical functional element 6 (see Fig. 4).
[0082] The layer thickness of the ribbon cable 7 is in the single- or double-digit micrometer range. The dimensions of the ribbon cable 7 perpendicular to the layer thickness are much larger, with its width typically being in the single-digit millimeter or single-digit centimeter range, and its length measured in the direction of extension being in the single- or double-digit centimeter range.
[0083] In the composite pane assembly 1, the ribbon cable 7 further comprises a first ribbon cable socket 12 and a second ribbon cable socket 13, which are firmly connected to the ribbon cable 7 at the second ribbon cable end 9 in the second ribbon cable connection area 11. The ribbon cable sockets 12, 13 are provided for electrical plug-in connection with respective connecting cable plugs 23, 24 of the two cable strands 17, 18 of the connecting cable 16. The ribbon cable sockets 12, 13 and the connecting cable plugs 23, 24 can be plugged into one another to form a mechanical plug-in connection, wherein the ribbon cable sockets 12, 13 and the connecting cable plugs 23, 24 form a positive and / or non-positive connection. The first connection cable plug 23 is used for plugging into the first ribbon cable socket 12 and the second connection cable plug 24 is used for plugging into the second ribbon cable socket 13.In addition, an electrical connection is established between the ribbon cable sockets 12, 13 and the connecting cable plugs 23, 24 when the connecting cable plugs 23, 24 are plugged into the ribbon cable sockets 12, 13. Each ribbon cable socket 12, 13 is provided with pins, for example, and each connecting cable plug 23, 24 is provided with corresponding receptacles, for example, which come into electrical contact when a plug connection is formed between the ribbon cable sockets 12, 13 and the connecting cable plugs 23, 24. It is understood that the ribbon cable sockets 12, 13 can equally be designed in the form of a plug, and the connecting cable plugs 23, 24 can correspondingly be designed as sockets.
[0084] Figure 1 illustrates the assembled state of the composite pane assembly 1, and Figure 2 shows a detailed view in the area of the ribbon cable sockets 12, 13, wherein the connecting cable plugs 23, 24 have already been brought into a position for insertion into the ribbon cable sockets 12, 13. For this purpose, the ribbon cable sockets 12, 13 have respective plug-in openings 27, 28, i.e., a first plug-in opening 27 on the first ribbon cable socket 12 and a second plug-in opening 28 on the second ribbon cable socket 13.
[0085] As can be seen in Figures 1 and 2, the ribbon cable 7 has a T-orientation. The insertion direction of the connecting cable plugs 23, 24 into the ribbon cable sockets 12, 13 is identical to the extension direction of the ribbon cable 7. With respect to a direction toward the second ribbon cable end 9 of the ribbon cable 7, the insertion direction is opposite. The plug-in openings 27, 28 of the ribbon cable sockets 12, 13 are oriented accordingly. The path of the connecting cable 16 is therefore identical to the extension direction of the ribbon cable 7. It is understood that any other orientations would also be possible, for example, an L-orientation, in which the insertion direction of the connecting cable plugs 23, 24 into the ribbon cable sockets 12, 13 is rotated by 90° relative to the extension direction of the ribbon cable 7.
[0086] Figure 4 illustrates an embodiment of the ribbon cable 7. The conductor tracks 14, which are arranged side by side on a carrier foil 29, are clearly visible. The conductor tracks 14 merge into an electrode array 15 in the first ribbon cable connection area 10, with each conductor track 14 being assigned an electrode 30.
[0087] Figure 5 illustrates an embodiment of the connecting cable 16 in the form of a round cable. In the round cable, the two cable strands 17, 18 are spatially combined into a common cable strand by a cable sheath 44.
[0088] As can be clearly seen in the embodiment of Figure 5, the connecting cable 16 generally has a first connecting cable connection area 21 and a second connecting cable connection area 22, wherein along a direction of extension of the connecting cable 16, the first connecting cable connection area 21 is located at a first connecting cable end 19 and the second connecting cable connection area 22 is located at a second connecting cable end 20 of the connecting cable 16. The first connecting cable plug 23 and the second connecting cable plug 24 are located at the first connecting cable connection area 21. The two cable strands 17, 18 of the connecting cable 16, which in the embodiment of Figure 5 are spatially combined to form a round cable, are each provided with connecting cable sockets 25, 26 at their other end, i.e.a first connection cable socket 25 and a second connection cable socket 26 to establish the electrical connection with a control electronics for the electrical functional element 6.
[0089] Figure 6 shows the mated state of the ribbon cable 7 and the connecting cable 16, which is designed in the form of a round cable. The plug-in openings 27, 28 of the ribbon cable sockets 12, 13 are each oriented such that the round cable runs in the direction of extension of the ribbon cable 7 and, with respect to a direction toward the second ribbon cable connection area 11, opposite to the latter.
[0090] For the sake of simplicity, Figures 5 and 6 show the connecting cable 16 without an interference suppressor, which is always provided in the connecting cable 16 according to the invention. This will be explained in more detail with reference to Figures 7 and 8.
[0091] Consider Figure 7 first. According to the invention, the connecting cable 16 has an electrical interference suppressor 32 for dampening high-frequency noise between the first connecting cable connection area 21 and the second connecting cable connection area 22. The high-frequency noise is received by the planar electrical functional element 6, which unintentionally acts as an antenna. Furthermore, the ribbon cable 7 can unintentionally act as an antenna.
[0092] In the embodiment of Figure 7, the interference suppression element 32 is a ferrite core 33 (ferrite ring) arranged around the connecting cable 16, which is designed in the form of a round cable. The ferrite core 33 is designed here, for example, to be foldable and can thus be easily attached to the finished connecting cable 16. As can be seen in Figure 7, the ferrite core 33, which here is designed, for example, as a double ferrite core, is arranged approximately centrally between the two connecting cable connection areas 21, 22. It is understood that the ferrite core 33 can also be arranged closer to the first connecting cable connection area 21 or closer to the second connecting cable connection area 22. The ferrite core 33 has no galvanic connection to the connecting cable 16. The ferrite core 33 can effectively attenuate high-frequency interference conducted via the connecting cable 16.
[0093] For the sake of simplicity, only the connecting cable 16 is shown in Figure 7. The connecting cable 16 with interference suppressor 32 can be used in the composite pane assembly 1 of Figure 1.
[0094] Figure 8 shows a further embodiment of the connecting cable 16 with interference suppression element 32. In the embodiment of Figure 8, the connecting cable 16 is provided with an electrical interruption 39, forming a first connecting cable section 40 and a second connecting cable section 41. The interference suppression element 32 is designed in the form of an electrical flat component 34 and is electrically connected in series to the two connecting cable sections 40, 41 at the electrical interruption 39 (the flat component 34 is electrically arranged between the two connecting cable sections 40, 41).
[0095] In this exemplary embodiment, the electrical flat component 34 has a circuit board 35 (printed circuit board, PCB) with soldered electrical components, wherein the electrical components for each round conductor 31 here comprise, for example, an inductance 36 in combination with a capacitor 37. For the sake of simplicity, Figure 8 schematically shows only a single inductance 36 and capacitor 37, which is assigned to a single round conductor 31. The circuit board 35 with electrical components is encased in a capsule 38 made of an electrically insulating material, so that good protection against external influences such as moisture can be achieved. The capsule 38 is not shown in detail in Figure 8.
[0096] An electrical connection of the flat component to the two connecting cable sections 40, 41 at a first flat component connection area 42 and a second flat component connection area 43 can be established by a plug-in connection, selected from a socket or plug, or by soldering or crimping. Such connections are well known to those skilled in the art under the term "wire-to-board," so they need not be discussed in detail here. The interference suppressor 32, designed as a flat component 34, can effectively attenuate high-frequency interference conducted via the connecting cable 16.
[0097] Although not shown in the figures, the interference suppressor 32 illustrated in Figure 8 as a flat component 34 could equally be designed in the manner of an SMD and have a prefabricated housing with a plurality of solder terminals as external connections. An inductor, optionally in combination with a capacitor, is arranged in the housing as electrical components for each round conductor 31, with the electrical components being connected to the solder terminals. Advantageously, the housing of the flat component 34 has a cylindrical or prismatic shape.
[0098] Figure 9 shows a flow chart of the method according to the invention for producing the composite pane arrangement 1 according to the invention.
[0099] The method comprises the following method steps: a) Providing a composite pane 2 comprising a first pane 3 and a second pane 4, which are bonded to one another via a thermoplastic intermediate layer 5, wherein an electrical functional element 6 is arranged between the two panes 3, 4, wherein the composite pane comprises a ribbon cable 7 with electrical conductor tracks 14, wherein the ribbon cable 7 has a first ribbon cable connection region 10 at a first ribbon cable end 8 and a second ribbon cable connection region 11 at a second ribbon cable end 9, wherein the first ribbon cable connection region 10 is arranged between the two panes 3, 4 and the second ribbon cable connection region 11 is led out of the composite pane 2 between the two panes 3, 4,and wherein the electrical conductor tracks 14 in the first ribbon cable connection region 10 electrically contact the electrical functional element 6, b) producing a connecting cable 16 with one or more cable strands 17, 18, wherein the connecting cable 16 comprises a plurality of round conductors 31, wherein the connecting cable 16 has a first connecting cable connection region 21 at a first connecting cable end 19 and a second connecting cable connection region 22 at a second connecting cable end 20, wherein the connecting cable 16 has an electrical interference suppression element 32 for dampening high-frequency noise between the first connecting cable connection region 21 and the second connecting cable connection region 22, c) electrically connecting the first connecting cable connection region 21 to the second ribbon cable connection region 11,wherein the second connecting cable connection area 22 is provided for electrical connection to a control electronics for the electrical functional element 6.,
[0100] Steps a), b) and c) can be performed in any order.
[0101] From the above, it can be seen that the composite glazing assembly according to the invention can advantageously attenuate high-frequency noise that is unintentionally received by the planar electrical functional element and, if applicable, by the ribbon cable, which act as an antenna. This prevents high-frequency interference signals from entering the vehicle electrical system and, in particular, an antenna amplifier connected downstream of a vehicle antenna for receiving antenna signals. Highly detrimental interference with antenna signals caused by high-frequency noise can thus be avoided. This is a major advantage of the composite glazing assembly according to the invention. The interference suppressor can be easily integrated into the technical environment in a space-saving manner. Existing composite glazing assemblies can be easily retrofitted.
[0102] List of reference symbols
[0103] 1 composite pane arrangement
[0104] 2 composite panes
[0105] 3 first slice
[0106] 4 second slice
[0107] 5 Intermediate layer
[0108] 6 electrical functional element
[0109] 7 ribbon cables
[0110] 8 first ribbon cable end
[0111] 9 second ribbon cable end
[0112] 10 first ribbon cable connection area
[0113] 11 second ribbon cable connection area
[0114] 12 first ribbon cable socket
[0115] 13 second ribbon cable socket
[0116] 14 Conductor track
[0117] 15 Electrode field
[0118] 16 connection cables
[0119] 17 first cable harness
[0120] 18 second cable harness
[0121] 19 first connection cable end
[0122] 20 second connection cable end
[0123] 21 first connection cable connection area
[0124] 22 second connection cable connection area
[0125] 23 first connection cable plug
[0126] 24 second connection cable plug
[0127] 25 first connection cable socket
[0128] 26 second connection cable socket
[0129] 27 first plug-in opening
[0130] 28 second plug-in opening
[0131] 29 Carrier film
[0132] 30 electrodes
[0133] 31 round ladders
[0134] 32 suppressor element
[0135] 33 Ferrite core 34 Flat component
[0136] 35 circuit boards
[0137] 36 Inductance
[0138] 37 Capacity 38 Capsule
[0139] 39 Interruption
[0140] 40 first connection cable section
[0141] 41 second connection cable section
[0142] 42 first flat component connection area 43 second flat component connection area
[0143] 44 Cable sheath
[0144] 45 Control electronics
Claims
Patent claims 1. Composite pane arrangement (1), comprising a composite pane (2) with a first pane (3) and a second pane (4), which are interconnected via a thermoplastic intermediate layer (5), an electrical functional element (6) between the two panes (3, 4), a ribbon cable (7) with electrical conductor tracks (14), wherein the ribbon cable (7) has a first ribbon cable connection area (10) at a first ribbon cable end (8) and a second ribbon cable connection area (11) at a second ribbon cable end (9), wherein the first ribbon cable connection area (10) is arranged between the two panes (3, 4) and the second ribbon cable connection area (11) is led out of the composite pane (2), and wherein the electrical conductor tracks (14) in the first ribbon cable connection area (10) make electrical contact with the electrical functional element (6),a connecting cable (16) with one or more cable strands (17, 18), wherein the connecting cable (16) comprises a plurality of round conductors (31), wherein the connecting cable (16) has a first connecting cable connection region (21) at a first connecting cable end (19) and a second connecting cable connection region (22) at a second connecting cable end (20), wherein the first connecting cable connection region (21) is electrically connected to the second ribbon cable connection region (11) and the second connecting cable connection region (22) is provided for electrical connection to a control electronics for the electrical functional element (6), and wherein the connecting cable (16) has an electrical interference suppression element (32) for dampening high-frequency noise between the first connecting cable connection region (21) and the second connecting cable connection region (22),wherein the electrical interference suppression element (32) is i) a ferrite core (33) arranged around the connecting cable (16), or ii) an electrical flat component (34) galvanically connected to the round conductors (31) of the connecting cable (16), wherein the connecting cable (16) has an electrical interruption (39), whereby a first connecting cable section (40) and a second connecting cable section (41) are formed, wherein the electrical flat component (34) is electrically connected in series to the two connecting cable sections (40, 41) at the electrical interruption (39), wherein the electrical flat component (34) contains an inductance (36) for each round conductor (31), optionally in combination with a capacitor (37).
2. Composite pane arrangement (1) according to claim 1, alternative ii), in which the electrical flat component (34) is electrically connected to the two connecting cable sections (40, 41) by a plug connection, selected from a socket or plug, or by soldering or crimping.
3. Composite pane arrangement (1) according to claim 1, alternative ii) or 2, in which the electrical flat component (34) has a circuit board (35) with soldered electrical components, wherein the electrical components for each round conductor (31) comprise an inductance (36), optionally in combination with a capacitor (37), wherein the circuit board (35) with soldered electrical components is enclosed by a capsule (38) made of an electrically insulating material.
4. Composite pane arrangement (1) according to claim 1, alternative ii), in which the electrical flat component (34) has a prefabricated housing with a plurality of solder connections as external connections, wherein at least one inductance (36), optionally in combination with a capacitor (37), is arranged in the housing as electrical components for each round conductor (31), wherein the electrical components are connected to the solder connections, wherein the electrical flat component (34) is electrically connected to the two connecting cable sections (40, 41) in each case by soldering.
5. Composite pane arrangement (1) according to claim 4, wherein the housing of the flat component (34) has a prismatic shape, in particular a cuboid shape, or a cylindrical shape.
6. Composite pane arrangement (1) according to one of claims 1 to 5, wherein the ribbon cable (7) has at least one connecting piece (12, 13) selected from a socket or a plug for electrical connection to the connecting cable (16), and wherein the connecting cable (16) has a corresponding connecting counterpart (23, 24) selected from a socket or a plug.
7. Composite pane arrangement (1) according to one of claims 1 to 6, wherein the connecting cable (16) for electrical connection to the control electronics has at least one connecting piece (25, 26), selected from a socket or a plug.
8. Composite pane arrangement (1) according to one of claims 1 to 7, wherein the electrical functional element (6) is an electro-optical functional element, in particular an SPD or PDLC functional element.
9. Composite pane arrangement (1) according to one of claims 1 to 8, wherein the connecting cable (16) has at least two spatially separated cable strands (17, 18).
10. Composite pane arrangement (1) according to one of claims 1 to 8, wherein the connecting cable (16) is designed in the form of a round cable.
11. A method for producing a composite pane arrangement (1) according to one of claims 1 to 10, comprising the following steps: a) providing a composite pane (2) with a first pane (3) and a second pane (4) which are surface-connected to one another via a thermoplastic intermediate layer (5), wherein an electrical functional element (6) is arranged between the two panes (3, 4), wherein the composite pane (2) comprises a ribbon cable (7) with electrical conductor tracks (14), wherein the ribbon cable (7) has a first ribbon cable connection region (10) at a first ribbon cable end (8) and a second ribbon cable connection region (11) at a second ribbon cable end (9), wherein the first ribbon cable connection region (10) is arranged between the two panes (3, 4) and the second ribbon cable connection region (11) is led out of the composite pane (2),and wherein the electrical conductor tracks (14) in the first ribbon cable connection region (10) make electrical contact with the electrical functional element (6), b) producing a connecting cable (16) with one or more cable strands (17, 18), wherein the connecting cable (16) comprises a plurality of round conductors (31), wherein the connecting cable (16) has a first connecting cable connection region (21) at a first connecting cable end (19) and a second connecting cable connection region (22) at a second connecting cable end (20), wherein the connecting cable (16) has an electrical interference suppression element (32) for damping high-frequency noise between the first connecting cable connection region (21) and the second connecting cable connection region (22), wherein the electrical interference suppression element (32) is i) a ferrite core (33) arranged around the connecting cable (16), or ii) a ferrite core (33) connected to the round conductors (31) of the connecting cable (16) is a galvanically connected electrical flat component (34),wherein the connecting cable (16) has an electrical interruption (39), whereby a first connecting cable section (40) and a second connecting cable, Section (41) are formed, wherein the electrical flat component (34) is electrically connected in series at the electrical interruption (39) to the two connecting cable sections (40, 41), wherein the electrical flat component (34) contains an inductance (36) for each round conductor (31), optionally in combination with a capacitor (37), c) electrically connecting the first connecting cable connection area (21) to the second ribbon cable connection area (11), wherein the second connecting cable connection area (22) is provided for electrical connection to a control electronics for the electrical functional element (6).
12. Use of the composite pane arrangement (1) according to one of claims 1 to 10 as Glazing for vehicles, aircraft or ships, preferably as vehicle glazing, in particular as windshield, roof, rear or side window of a motor vehicle.