Glazing unit with electronic component

Abstract

Glazing unit (10) comprising at least: - a first disc (1) having a first main surface (I) and a second main surface (II), - a second pane (2) having a first main surface (III) and a second main surface (IV), wherein the first pane (1) is connected to the second pane (2) via an intermediate layer (3) to form a composite pane (101), - an electronic component (5), wherein the second disc (2) has a cavity (7) with at least one opening (9) directed towards the intermediate layer, wherein the electronic component (5) is arranged in the cavity (7), wherein the cavity (7) has a filling (11) formed from an optically transparent, cured adhesive, wherein the cavity (7) is arranged at a distance of at least 100 mm from a circumferential pane edge (17) of the second pane (2), and wherein the second main surface (II) of the first pane (1) and the first main surface (III) of the second pane (2) face one another and at least in sections do not run parallel to one another, wherein the second pane (2) has a first region (B1) which in sections has a greater curvature than the curvature of the rest of the second pane (2), and wherein the cavity (7) is arranged in the first region (B1), and wherein the second pane (2) has a projection (15) in the first region (B1), and when the composite pane (101) is mounted, the cavity (7) is formed by the projection (15).

Description

[0001] The invention relates to a glazing unit with an electronic component, as well as a vehicle with such a glazing unit and a method for producing such a glazing unit.

[0002] Vehicles often include a laminated glass pane used as a roof or windshield. This consists of two glass panes bonded together by a thermoplastic interlayer. The individual panes of a laminated glass pane are bent congruently to achieve a uniform curvature. One or more thermoplastic composite films are inserted between the congruently bent panes. These films melt during lamination, creating a thermoplastic interlayer of constant thickness.

[0003] State-of-the-art vehicles feature interior lighting that provides subtle or striking illumination, depending on the need. This lighting not only provides orientation within the vehicle but also creates a pleasant atmosphere for passengers. WO 2014 / 060409 A1 and WO 2015 / 095288 A2 disclose the coupling of light into a glass pane via a side surface. However, the point-based coupling of light makes it difficult to achieve homogeneous illumination of the entire pane.

[0004] WO 2004 / 106056 A1 discloses a method for producing composite elements comprising two glass panes and an insert located between them. The insert is not fully bonded to the outer elements. It is, for example, perforated. A transparent, thermoplastic film layer connects the outer elements to the insert. By heating the film layer to a softening temperature, the insert is pressed together with both glass panes, degassing the holes in the insert and filling them with the film material.

[0005] WO 2019 / 105855 A1 relates to a composite pane with an integrated electrical attachment. The composite pane comprises an inner pane and an outer pane, as well as a thermoplastic intermediate layer that connects the two panes. The inner pane has a recess into which the attachment is inserted and located entirely within the composite pane.

[0006] The object of the present invention is to provide an improved glazing unit with an electronic component which allows improved integration of an electronic component.

[0007] This object is achieved by a glazing unit according to claim 1. Preferred embodiments emerge from the subclaims.

[0008] The invention therefore relates to a glazing unit comprising at least: - a first disc having a first main surface and a second main surface, - a second pane having a first main surface and a second main surface, wherein the first pane is bonded to the second pane via an intermediate layer to form a composite pane, and - an electronic component.

[0009] According to the invention, the second pane has a cavity with at least one opening directed towards the intermediate layer. The electronic component is arranged in the cavity, wherein the cavity comprises a filling formed from an optically transparent, cured adhesive and the cavity is arranged at a distance of at least 100 mm from a circumferential edge of the second pane. This allows electronic components to be securely integrated into the composite pane and, at the same time, arranged centrally in the composite pane. Because the cavity is filled with a curable, liquid adhesive during production, the electronic component can be embedded in the adhesive and securely stored. These are major advantages of the present invention. Furthermore, the composite pane is delimited by a circumferential side surface, particularly preferably four circumferential side surfaces.

[0010] The cavity is preferably arranged in a central section, particularly centrally in the second pane. If the electronic component is a light source or a sensor, this can achieve significantly better spatial illumination or the sensor's detection range than positioning it at the edge of the composite pane. The spacing is particularly chosen such that the electronic component is positioned as centrally as possible relative to the covered (vehicle) interior, in order to achieve optimal spatial coverage and thus optimal spatial illumination or monitoring.

[0011] In the glazing unit according to the invention, the second main surface of the first pane and the first main surface of the second pane face one another and are not arranged parallel to one another at least in sections. The distance between the second main surface of the first pane and the first main surface of the second pane is not constant. The second pane has a first region which has a greater curvature than the curvature of the rest of the second pane. The second pane has the first region in which the distance between the second main surface of the first pane and the first main surface of the second pane is greater than in a second region of the second pane. The distance between the first pane and the second pane can be constant in sections in the region of the cavity, i.e. within the first region.The transition from the first to the second area can be stepped. Such glazing, especially vehicle windows, is three-dimensionally curved and tends to become increasingly curved to create a striking, visually appealing design.

[0012] The second pane has a projection in the first region, so that when the composite pane is mounted, the cavity is formed by the projection. In the first region, the second main surface of the first pane and the first main surface of the second pane extend asymmetrically, at least in sections. In the second region, the second main surface of the first pane and the first main surface of the second pane extend symmetrically.

[0013] According to the invention, the glazing unit comprises at least one electronic component. The at least one electronic component can be a light source, a radar, a sensor, a lidar sensor, an LED module (LED light), an OLED module, or a strip-shaped LED module (LED strip). Sensors can be, for example, rain sensors, daylight sensors, backlight sensors, ultrasonic sensors, pressure and temperature sensors, antennas, optical cameras, and radar sensors. Furthermore, the aforementioned components can also be used in combination. LED modules as a light source are particularly bright and efficient.

[0014] In a further preferred embodiment, the electronic component is connected to a power source via an electrical connection, wherein the electrical connection is visually unobtrusive or wireless. However, the electronic component requires an electrical and / or communicative connection with the terminals usually running along the edge of the window to a power source or to a control unit. Due to the visually unobtrusive design of at least this electrical connection according to the invention, it is advantageously possible to significantly improve the feeling of space conveyed to the occupants by the glazing unit as a roof pane, even though the electronic component preferably occupies a central position above the interior.It is no longer necessary to cover the supply lines, which has previously been common practice for sensors arranged in the edge area of ​​the pane and is visually disturbing, for example by means of a black print extending to the edge of the pane.

[0015] In a further preferred embodiment, the electrical connection is formed by an electrically conductive transparent layer, by conductive wires, by a printed current conductor or by a cable connection to a power source.

[0016] All of the preferred embodiments of the visually unobtrusive electrical connection mentioned are almost or completely transparent and thus meet the high requirements of the automotive industry for the largest possible transparent surface of a roof window. The term “visually unobtrusive” can also include “barely perceptible to the human eye”. The visually unobtrusive electrical connection does not impede visibility through the laminated pane, or only impedes it to a very small extent. It therefore offers an excellent option for securely establishing the power connection and, if desired, also the communicative connection to a control unit (electronic control unit) or an alarm output device, without disturbing the distance - which is often quite large due to the distance between the component (e.g. light source or sensor) and the edge of the laminated pane - with a cover or black print and reducing the occupants’ sense of space.

[0017] To ensure a particularly attractive design, in a preferred embodiment of the invention, the electrical power supply of the electronic component can be provided via an electrically conductive layer on one of the pane surfaces. This eliminates the need for visually disruptive electrical supply lines in the form of cables. Electrically conductive layers are already frequently used in motor vehicle windows in the form of heatable layers or so-called low-E (low emissivity) layers, which prevent the vehicle interior from becoming excessively hot. Depending on the further intended use of the electrically conductive layer, it can be applied to the second main surface of the first pane, or to the first or second main surface of the second pane.Examples of layer structures that simultaneously possess high electrical conductivity and infrared-reflecting properties are known to those skilled in the art from WO 2013 / 104439 and WO 2013 / 104438. However, any electrically conductive layer is also suitable for electrically contacting the electronic component with the electrical connection. The electrically conductive layer is used to form conductors through which two voltage poles are connected to the electronic component. Methods for structuring electrically conductive layers are well known to those skilled in the art. These include, for example, etching or laser processes. Particularly preferably, the current conductors are created by laser separation lines in the electrically conductive layer.

[0018] Contacting a component on a conductive layer can be achieved, for example, by means of connection elements applied to the electrically conductive layer. A foil-like connection element can also be inserted into the layer stack in the region of the cavity. This connection element has two electrical contacts on the surface facing the electrically conductive layer, which are placed on the corresponding current conductors of the electrically conductive layer. The area of ​​the foil-like connection element surrounding the electrical contacts can, for example, be provided with an adhesive that fixes the connection element to the layer. The portion of the foil-like connection element onto which the electronic component is to be placed is also provided with contacts. The foil-like connection element preferably has a metallic surface for this purpose.

[0019] Alternatively or additionally, the electrical connection can be established by conductive wires. The necessary transparency or visually unobtrusive design, which is also the subject of the present invention, can be achieved in this variant by making the wires very thin and / or serpentine. A well-known example in vehicle window manufacturing is wires used as heating wires in windshields. They are typically approximately 20 µm thick and are practically invisible when viewed through the glass. Furthermore, multiple wires can be provided for a power line and / or communication connection.Since the wires are so thin that the occupants can hardly see them visually, a large number of wires can serve both as electrical connections and for communication and data transmission without taking up much space, so that in this way redundancy for the power line or for data transmission can be provided without further visual impairment.

[0020] Alternatively or cumulatively, the electrical connection to a power source can be established by a printed current conductor. Conductive structures produced by printing, in particular a metallic material, are generally known to those skilled in the art in the field of vehicle window manufacturing and are used in a variety of ways, for example as busbars, heating conductors, antenna structures, or alarm loops. Exemplary printing methods are described in WO 2019 / 206592 A1 and the citations cited therein. For the purposes of the present invention, printing methods for applying a printed current conductor should, in particular, be selected that produce a comparatively thin layer of the conductive material. Silver can be selected as a preferred conductive material that can easily be printed in a thin layer thickness in the range of micrometers.

[0021] Alternatively or cumulatively, the electrical connection may be established by a cable connection to a power source.

[0022] If a light source is inserted as a component into the cavity, the refractive index of the filling and the refractive index of the first pane are the same. In this case, the light source is intended to illuminate an interior space adjacent to the second pane. The light source is provided to generate light that can be coupled into the second pane, wherein the light source is arranged in the filling. The cavity has the filling formed from an optically transparent, cured adhesive. The light emitted by the light source is intended to be coupled into the second pane via the filling and to illuminate an adjacent space. Since the refractive index of the optically transparent, cured adhesive is the same as the refractive index of the second pane, the light can be coupled into the pane with little or no loss of light intensity.The light is transmitted almost entirely at the transition from the cavity filling to the second pane and is neither refracted nor reflected. The glazing unit according to the invention surprisingly exhibits improved light coupling from the light source to the second pane without negatively affecting other optical properties of the second pane. The arrangement of the light source in the cavity also prevents the need for complex drilling in the second pane.

[0023] In a preferred embodiment, the electronic component is a light source for illuminating an interior space. The light source emits light in a direction orthogonal to the second pane.

[0024] In an advantageous embodiment of the glazing unit according to the invention, a refractive index of the optically transparent, cured adhesive and a refractive index of the second pane are the same or almost the same. The refractive index of the second pane can be, for example, 1.51 at a wavelength of 550 nm. Within the scope of the present invention, refractive indices are generally specified relative to a wavelength of 550 nm. The refractive index is fundamentally independent of the measurement method; it can be determined, for example, using ellipsometry. Ellipsometers are commercially available. The same measurement method is used to determine the refractive index of the filling as to determine the refractive index of the second pane.

[0025] An optically transparent adhesive is curable, i.e. it can be irreversibly cured. Typically, it is a plastic that is cured into a polymer-crosslinked state. This distinguishes the curable adhesive significantly from a thermoplastic, which is also optically transparent but can be reversibly softened by the application of heat. In contrast, the curable adhesive can no longer be made flowable once it has cured. The optically transparent, curable adhesive is therefore not a non-curable thermoplastic. The curable, optically transparent adhesive can be cured by heat, exposure to electromagnetic radiation, preferably UV radiation, and / or chemically. Curing preferably takes place by the application of heat or an increase in temperature and / or UV radiation.

[0026] The transparent adhesive, for example, is based on silicone. Optically transparent adhesives are known, in particular, by the acronym LOCA (liquid optically clear adhesive). These are often used in touch-sensitive displays, for example, to firmly bond them to an LCD or to firmly bond plastic covers to the touch-sensitive displays. After application, the adhesive is often cured using UV radiation.

[0027] The curable, optically transparent adhesive can, for example, contain or consist of polyurethane (PU), polyacrylate, polyacetate resin, casting resin, epoxy resin, Acralyt, or a copolymer or mixture thereof. Advantageously, the optically transparent adhesive consists of a casting resin, particularly polyurethane- or silicone-based.

[0028] For the purposes of the invention, transparent is understood to mean an article, in particular an optically transparent adhesive, a light extraction means and / or a transparent body (for example a pane), which has a transmission in the visible spectral range of greater than 20%, preferably greater than 50%, particularly preferably greater than 70%, in particular greater than 85%.

[0029] Basically, all electrically insulating substrates which are thermally and chemically stable and dimensionally stable under the conditions of manufacture and use of the glazing unit according to the invention are suitable as the first pane and second pane.

[0030] The first pane and / or the second pane preferably contain or consist of glass, particularly preferably flat glass, very particularly preferably float glass, such as soda-lime glass, borosilicate glass or quartz glass, or clear plastics, preferably rigid clear plastics, in particular polyethylene, polypropylene, polycarbonate, polymethyl methacrylate, polystyrene, polyamide, polyester, polyvinyl chloride and / or mixtures thereof. The first pane and / or the second pane are preferably transparent, in particular for use of the panes as a front pane (also referred to as a windshield) or rear window of a vehicle or other applications where high light transmission is desired. For the purposes of the invention, a pane is then understood to be transparent if it has a transmission in the visible spectral range of greater than 70%. In particular, at least the first pane and preferably also the second pane are made of clear glass.

[0031] For windows that are not in the driver's relevant field of vision, such as roof windows, the transmission can be much lower, perhaps greater than 5%. For this purpose, the second pane and / or the intermediate layer can be tinted or colored.

[0032] The thickness of the first pane and / or the second pane can vary widely and thus be perfectly adapted to the requirements of the individual case. Standard thicknesses of 1.0 mm to 25 mm are preferably used, preferably 1.4 mm to 2.5 mm for vehicle glass, and preferably 4 mm to 25 mm for furniture, appliances, and buildings. The size of the panes can vary widely and depends on the size of the inventive use. The first pane and second pane have areas of 200 cm, for example, which are common in vehicle construction and architecture. 2 up to 20 m 2Preferably, the panes are planar or slightly or strongly curved in one or more directions of the room.

[0033] The first pane and the second pane are connected to one another by at least one intermediate layer. The intermediate layer is preferably transparent, tinted, or colored. The intermediate layer preferably contains or consists of at least one plastic, preferably polyvinyl butyral (PVB), ethylene-vinyl acetate (EVA), and / or polyethylene terephthalate (PET). However, the intermediate layer can also contain, for example, polyurethane (PU), polypropylene (PP), polyacrylate, polyethylene (PE), polycarbonate (PC), polymethyl methacrylate, polyvinyl chloride, polyacetate resin, casting resins, acrylates, fluorinated ethylene-propylene, polyvinyl fluoride, and / or ethylene-tetrafluoroethylene, or copolymers or mixtures thereof. The intermediate layer can be formed by one or more films arranged one above the other, with the thickness of a film preferably being from 0.025 mm to 1 mm, typically 0.38 mm or 0.76 mm.The intermediate layers can preferably be thermoplastic and, after lamination, bond the first pane, the second pane, and any additional intermediate layers together. So-called acoustically dampening intermediate layers, which preferably consist of three layers of PVB, are particularly advantageous, with the middle layer being softer than the two outer layers.

[0034] The intermediate layer can be formed solely from the (polymeric) filling in the region of the cavity. In the remaining regions, the intermediate layer is preferably designed as a thermoplastic layer (in particular formed from a thermoplastic film), which, however, does not extend into the region of the cavity but ends in front of it. Optionally, however, a thermoplastic layer can also be present in the region of the cavity. Thus, it is possible for at least one thermoplastic layer (in particular formed from at least one thermoplastic film) to be arranged over the entire surface between the first pane and the second pane, which layer forms solely the intermediate layer in the regions in which the panes run symmetrically and which rests against the first pane in the region of the cavity, wherein the filling is arranged between the at least one thermoplastic layer and the second pane.

[0035] The intermediate layer can also be a functional intermediate layer, in particular an infrared-reflecting intermediate layer, an infrared-absorbing intermediate layer, a UV-absorbing intermediate layer, an at least partially colored intermediate layer, and / or an at least partially tinted intermediate layer. For example, the thermoplastic intermediate layer can also be a band filter film.

[0036] If the glazing unit according to the invention is intended, for example, to separate the interior space from the external environment in an opening, for example in a vehicle or a building, the first pane can face the interior space or the external environment.

[0037] The first pane and / or the second pane may have further suitable layers known per se, for example anti-reflective coatings, non-stick coatings, anti-scratch coatings, photocatalytic coatings or sun protection coatings or low-E coatings.

[0038] In one embodiment, the second pane can be provided with a low-E coating on its second main surface. Low-E coatings are emissivity-reducing coatings and reflect IR radiation, particularly thermal radiation, emanating from a heated glass pane. The penetration of thermal radiation into the vehicle interior is reduced, which also results in less heating of the interior. In winter, at low outside temperatures, the radiation of heat from the interior to the outside environment is prevented. Transparent emissivity-reducing coatings can, for example, contain reflective layers based on indium tin oxide (ITO) or other transparent conductive oxides (TCO). When designed as a roof pane, these ensure that thermal radiation is reflected into the interior of the vehicle, which significantly increases comfort for the vehicle occupants.The low-E coating preferably does not contain any silver layers and can thus be arranged on the first main surface of the first disc without causing problems with corrosion.

[0039] Furthermore, the glazing unit can comprise further functional elements, in particular electronically controllable optical elements, for example PDLC elements, electrochromic elements, photovoltaic cells or the like, which are typically arranged between the first pane and the second pane.

[0040] A further aspect of the invention comprises a vehicle, in particular a passenger car, with a glazing unit according to the invention.

[0041] A method for producing a glazing unit according to the invention comprises the following steps: - Providing a first pane, a second pane and a particularly thermoplastic intermediate layer, wherein the second pane has a cavity with at least one opening directed towards the intermediate layer, - Filling the cavity with a filling and at least one electronic component, - connecting the first pane and the second pane via the thermoplastic intermediate layer such that the second main surface of the first pane and the first main surface of the second pane face the thermoplastic intermediate layer.

[0042] The filling comprises an optically transparent, curable adhesive, which can be cured after filling or after the two panes are bonded. The curable, optically transparent adhesive can be cured by heat, exposure to electromagnetic radiation, preferably UV radiation, and / or chemically. Curing preferably occurs through the application of heat or an increase in temperature and / or UV radiation.

[0043] In a further embodiment of the method, the first pane and a second pane are bonded together by at least one intermediate layer to form a composite pane. The first pane and the second pane are laminated together via the intermediate layer, for example, using autoclave processes, vacuum bag processes, vacuum ring processes, calender processes, vacuum laminators, or combinations thereof. The bonding of the panes is typically achieved under the influence of heat, vacuum, and / or pressure.

[0044] The thermoplastic intermediate layer is preferably provided as a film.

[0045] Within the scope of the present invention, all embodiments mentioned for individual features can also be freely combined with one another, provided they are not contradictory.

[0046] The invention is explained in more detail below with reference to figures and exemplary embodiments. The figures are schematic representations and not to scale. The figures do not limit the invention in any way. It should be noted that different aspects are described, each of which can be used individually or in combination. This means that any aspect can be used with different embodiments of the invention, unless explicitly presented as a mere alternative.

[0047] They show: Fig. 1 a plan view of an embodiment of the glazing unit according to the invention, Fig. 2 a schematic cross-sectional view of the glazing unit according to the invention, and Fig. 3 a flowchart of a process.

[0048] Numerical values ​​are generally not to be understood as exact values, but also include a tolerance of + / - 1% to + / - 10%.

[0049] Fig. Figure 1 shows a plan view of a glazing unit 10. Glazing unit 10 is equipped with an electronic component 5, using the example of a composite pane 101. Composite pane 101 has a three-dimensional curvature. Composite pane 101 is preferably curved in one or more directions of space, as is common for motor vehicle windows, for example, with typical radii of curvature ranging from approximately 10 cm to approximately 40 m.

[0050] The electronic component 5 is a light source, in particular an LED module. Alternatively or additionally, the electrical component 5 can comprise a radar, a sensor, a camera, or a strip-shaped LED module. The laminated pane 101 can be, for example, automotive glazing (e.g., windshield or roof pane), structural glazing, or a component of a piece of furniture. The glazing unit 10 can also be part of an insulating glazing unit and serve, for example, as an outer or inner pane in a window of a building. Furthermore, the glazing unit 10 can be installed in an interior space and can serve, for example, as glazing in a conference room.

[0051] The glazing unit 10 comprises a first pane 1, which is connected to a second pane 2 via an intermediate layer 3. In a first region B1, the second pane 2 has, at least in sections, a greater curvature K than the curvature of the remaining second pane 2. The remaining region of the second pane 2 forms a second region B2, in which the second pane 2 has been bent less strongly than in the first region B1. A greater curvature generally corresponds to a smaller radius of curvature of the pane. The strong curvature can form a projection 15, in which the electronic component 5 is arranged. The first region B1 is arranged in a central section, in particular in the middle, at a distance of at least 100 mm from a circumferential pane edge 17 of the second pane 2. The transition from the second region B2 to the first region B1 is stepped.In particular, the second pane 2 has the projection 15 in the first region B1. When the composite pane 101 is mounted, the projection forms a cavity 7. The cavity 7 is open toward the intermediate layer 3, so that the cavity 7 has an opening 9 there.

[0052] In Fig. Figure 2 shows a cross-sectional view of the glazing unit 10 along the section line AA'. The glazing unit 10 comprises the first pane 1 with a first main surface I and a second main surface II. The first pane 1 is connected to the second pane 2 via an intermediate layer 3 to form the composite pane 101. The first pane 1, the intermediate layer 3, and the second pane 2 were bonded to one another by lamination, in particular autoclaving. The second pane 2 has a first main surface III and a second main surface VI opposite the first main surface III.

[0053] The first pane 1 and the second pane 2 are made of soda-lime glass, for example. The intermediate layer 3 is thermoplastic and made of, for example, a 0.76 mm thick PVB film. The composite pane 101 is defined by four circumferential side surfaces 13.

[0054] The glazing unit 10 further comprises the electronic component 5, which is arranged in the cavity 7 of the second pane 2. The composite pane 101 has a first region B1 in which the second main surface II of the first pane 1 and the first main surface III of the second pane 2 do not run parallel to one another. In the first region B1, the cavity 7 forms between the second main surface II of the first pane 1 and the first main surface III of the second pane 2. In other words, the cavity 7 is an expanded space between the panes. The distance between the second main surface II of the first pane 1 and the first main surface III of the second pane 2 is not constant. As a result, the cavity 7 between the first panes 1 and the second pane 2 is widened, so that the electronic component 5 can be securely integrated into the composite pane 101.

[0055] The cavity 7 can have any basic geometric shape, such as the shape of a circle, quadrilateral, triangle, square, rectangle, pentagon or any other regular or irregular polygon.

[0056] The cavity 7 has an opening 9 directed toward the intermediate layer 3 and a filling 11 formed from an optically transparent, cured adhesive. The filling 11 can be a liquid polymer filling, in particular a cured, optically transparent adhesive. The adhesive is poured into the cavity 7 in liquid or flowable form and then cured. By filling the cavity 7 with a curable, liquid adhesive during production, the electronic component 5 can be embedded in the adhesive and securely stored. These are major advantages of the present invention. The filling 11 is connected directly to the second pane 2 and, via the intermediate layer 3, to the first pane 1.

[0057] The cured, optically transparent adhesive can, for example, contain or consist of polyurethane (PU), polyacrylate, polyacetate resin, casting resin, epoxy resin, Acralyt, or a copolymer or mixture thereof. Advantageously, the optically transparent adhesive consists of a casting resin, particularly polyurethane- or silicone-based.

[0058] The electronic component 5 is a light source located entirely within the filling 11. The light source is an LED module (LED light). The light source can comprise one or more light-emitting diodes (LEDs, LED light). The electronic component 5 can also comprise an organic light-emitting diode (OLED), a display device, or a high-performance LED. The light 21 of the light source is directed toward the second pane 2, orthogonal to the main surface III. The refractive index of the filling 11 and the refractive index of the second pane 2 are the same or almost the same. The refractive index of the second pane 2 can be, for example, 1.51 at a wavelength of 550 nm.

[0059] According to the present invention, the cavity 7 containing the electronic component 5 (light source or sensor) is positioned at a distance from the edge of the second pane 2. The distance is at least 100 mm, for example, 200 mm or 500 mm. The spacing is selected in particular such that the light source or sensor is positioned as centrally as possible relative to the (vehicle) interior to be covered, in order to achieve optimal coverage and thus optimal illumination or monitoring.

[0060] The dimensions of the first pane 1 or the second pane 2 can be, for example, 1.4 m x 1.5 m. The first pane 1 and the second pane 2 are made of soda-lime glass, for example. The thickness of the first pane 1 and the second pane is, for example, 3 mm, 2.1 mm or 1.6 mm each. It is understood that the thicknesses of the first pane 1 and the second pane 2 can be adapted to the respective use. The first pane 1 and / or the second pane 2 can, for example, contain toughened, semi-toughened or non-toughened glass. Alternatively, the first pane 1 and / or the second pane 2 can be made of a plastic, for example polycarbonate. The first pane 1, the second pane 2 and the thermoplastic intermediate layer 3 can be clear and colorless, but also tinted or colored.The composite pane 101 can also be provided with an additional function by the thermoplastic intermediate layer 3 having functional inclusions, for example inclusions with IR-absorbing, UV-absorbing, coloring or acoustic properties.

[0061] Particularly when using the glazing unit 10 according to the invention in vehicles, for example, as a roof pane, it is advantageous to implement additional functions to reduce the negative effects of weather influences such as strong sunlight or ice formation. For this purpose, so-called low-E coatings and / or heatable coatings can be applied to the inside of the inner pane or the outer pane. Suitable material compositions for an electrically heatable coating, which also functions as a low-E coating, can be found, for example, in WO 2013 / 104439 and WO 2013 / 104438.

[0062] Fig.3 shows a flow diagram of a method for producing the glazing unit 10 according to the invention. The method comprises at least the following method steps: a) Providing the first pane 1, the second pane 2 and the in particular thermoplastic intermediate layer 3, wherein the second pane 2 has the cavity 7 with at least one opening 9 directed towards the intermediate layer, b) filling the cavity 7 with the filling 11, which contains the optically transparent, curable adhesive, c) arranging at least one electronic component 5 in the filling 11 of the cavity 7, d) connecting the first pane 1 and the second pane 2 via the thermoplastic intermediate layer 3, so that the second main surface II of the first pane 1 and the first main surface III of the second pane 2 face the thermoplastic intermediate layer 3, wherein curing of the optically transparent, curable adhesive takes place after step c) or after step d).

[0063] Typically, the first pane 1 and the second pane 2 are bent before being joined to form the composite pane 101. The bending of the first pane 1 and the second pane 2 takes place at a temperature of, for example, 500°C to 700°C, with the panes not being bent congruently in at least the first region B1 of the second pane 2. This creates the cavity 7 between the panes. The first pane 1 and the second pane 2 are bent separately from one another in at least one pane section.

[0064] Optionally, additional components 5 can be inserted into the cavity 7.

[0065] In step d), the first pane 1, a thermoplastic composite film as intermediate layer 3, and the second pane 2 are arranged to form a layer stack. The layer stack is then laminated to form the composite pane 101.

[0066] The glazing unit according to the invention with the electronic component has the advantage over prior art glazing in that the electronic component is protected within the glazing unit, meaning external influences do not negatively impact the electronic component. A component typically attached to the outside of the laminated pane is eliminated. Compared to a component attached to the outside of the glazing, the embedded component does not interfere with handling of the glazing.

[0067] By using an optically transparent, cured adhesive to fill the cavity, the light intensity is enhanced, as the light from a light source radiates unhindered from the pane. This was unexpected and surprising to the expert. List of reference symbols: 1 first slice 2 second slice 3 Intermediate layer 5 electronic components 7 Cavity 9 Opening 10 glazing units 11 Filling 13 Side surface 15 lead 17 Disc edge 21 Light 101 Composite pane B1 first area B2 second area K strong curvature I first main surface of the first disc 1 II second main surface of the first disc 1 III first main surface of the second disc 2 IV second main surface of the second disc 2 QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] WO 2014 / 060409 A1

[0003] WO 2015 / 095288 A2

[0003] WO 2004 / 106056 A1

[0004] WO 2019 / 105855 A1

[0005] WO 2013 / 104439

[0017] WO 2013 / 104438 [0017, 0061] WO 2019 / 206592 A1

[0020] WO 2013 / 104439

[0061]

Claims

[1] Glazing unit (10) comprising at least: - a first disc (1) having a first main surface (I) and a second main surface (II), - a second pane (2) having a first main surface (III) and a second main surface (IV), wherein the first pane (1) is connected to the second pane (2) via an intermediate layer (3) to form a composite pane (101), - an electronic component (5), wherein the second disc (2) has a cavity (7) with at least one opening (9) directed towards the intermediate layer, wherein the electronic component (5) is arranged in the cavity (7), wherein the cavity (7) has a filling (11) formed from an optically transparent, cured adhesive, wherein the cavity (7) is arranged at a distance of at least 100 mm from a circumferential pane edge (17) of the second pane (2), and wherein the second main surface (II) of the first pane (1) and the first main surface (III) of the second pane (2) face one another and at least in sections do not run parallel to one another, wherein the second pane (2) has a first region (B1) which in sections has a greater curvature than the curvature of the rest of the second pane (2), and wherein the cavity (7) is arranged in the first region (B1), and wherein the second pane (2) has a projection (15) in the first region (B1), and when the composite pane (101) is mounted, the cavity (7) is formed by the projection (15). [2] Glazing unit (10) according to claim 1, wherein the cavity (7) is arranged in a central portion, in particular centrally in the second pane (2). [3] Glazing unit (10) according to claim 1 or 2, wherein the second pane (2) has a first region (B1) in which the distance between the second main surface (II) of the first pane (1) and the first main surface (III) of the second pane (2) is greater than in a second region (B2) of the second pane (2). [4] Glazing unit (10) according to one of claims 1 to 3, wherein the electronic component (5) comprises a light source, a radar, a sensor, a camera, an LED module or a strip-shaped LED module. [5] Glazing unit (10) according to claim 4, wherein the electronic component (5) is a light source for illuminating a room and wherein the light source emits light in a direction orthogonal to the second pane (2). [6] Glazing unit (10) according to one of claims 1 to 5, wherein a refractive index of the filling (11) is equal to the refractive index of the second pane (2) at a wavelength of 550 nm. [7] Glazing unit (10) according to one of claims 1 to 6, wherein the optically transparent adhesive comprises casting resin, in particular based on polyurethane or silicone. [8] Glazing unit (10) according to one of claims 1 to 7, wherein the electronic component (5) is connected to a power source via an electrical connection, wherein the electrical connection is optically transparent. [9] Glazing unit (10) according to one of claims 1 to 8, wherein the electronic component (5) has an electrical connection to a control unit formed by a transparent electrically conductive layer, by conductive wires, by a printed current conductor or by a cable connection to a power source. [10] Vehicle, in particular a passenger car, with a glazing unit (10) according to one of the preceding claims 1 to 9.

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