Composite glass with a sensor system and method for manufacturing composite glass with a sensor system

Description

[0001] The invention relates to a laminated glass pane with a sensor arrangement and a method for manufacturing a laminated glass pane with a sensor arrangement.

[0002] It is known that switching regions can be formed by a surface electrode or by an arrangement of two coupled electrodes, for example as capacitive switching regions. When an object, e.g., a finger, approaches the switching region, the capacitance of the surface electrode to ground or the capacitance of the capacitor formed by the two coupled electrodes changes. Such switching regions are known, for example, from US 2010 / 179725 A1, US 6 654 070 B1, WO 2013 / 091961 A1, and US 2006 / 275599 A1.

[0003] The change in capacitance is measured via a circuit arrangement or sensor electronics, and a switching signal is triggered when a threshold value is exceeded. Circuit arrangements for capacitive switches are known, for example, from DE 20 2006 006 192 U1, EP 0 899 882 A1, US 6,452,514 B1 and EP 1 515 211 A1.

[0004] From WO 2013 / 053 611 A1, an electrochromic insulating glass unit with a sensor surface is known.

[0005] Furthermore, DE 35 32 120 A1 is a windshield with a reflective coating.

[0006] A device for projecting optical information or warning signals into the driver's field of vision using a reflective hologram with mirror properties is known.

[0007] However, especially with transparent or small sensor surfaces, it can be problematic for a user to recognize the sensor surface as such.

[0008] In Figure 1An exemplary situation is shown schematically with regard to a user B1 and a user B2.

[0009] The diagram schematically depicts two sensor arrays S touch, located at the top edge of a laminated glass pane 100. To make them identifiable, a first marking M 1 is applied to the left sensor array, indicating, for example, the sensitive area with arrows, and a second marking M 2 is applied to the right sensor array, indicating, for example, the area with a circle. It should be noted that the permanent application of markings can be disruptive, especially if a sensor array cannot be operated by a person who is not within reach of the sensor array. For example, the left sensor array is not reachable by person B 2, so the marking M 1 restricts person B 2's field of vision. Such situations are particularly disadvantageous for vehicle windshields, as these have specific requirements regarding the field of vision.

[0010] It would therefore be desirable to be able to provide laminated glass panes with sensor arrangements that make the sensor arrangements position-selectively perceptible.

[0011] The problem is solved by a laminated glass pane with a sensor arrangement according to claim 1. The laminated glass pane has a first glass layer and a second glass layer, connected by a combination film, wherein the sensor arrangement is suitable for detecting the approach of a finger. A hologram is arranged at the location of the sensor arrangement, which becomes optically perceptible to an observer when illuminated, the hologram being arranged between the first glass layer and the second glass layer.

[0012] The arrangement according to the invention makes it possible to perceive a sensor arrangement in a position-selective manner, so that a person who can also operate the sensor arrangement can recognize the position of the sensor arrangement, while for other persons who cannot operate the sensor arrangement, disturbances of the field of vision are reduced.

[0013] In one embodiment of the invention, the sensor arrangement comprises a capacitive sensor or an optical sensor. This means that different types of sensors can be identified using the invention, thereby enabling a wide range of applications.

[0014] In a further embodiment of the invention, the hologram is applied to the combination film. Applying it to the combination film simplifies production and, moreover, reliably protects the hologram from negative production influences as well as from damage caused by external factors.

[0015] According to a further embodiment of the invention, the combination film contains at least one substance selected from the group consisting of polybutylene terephthalate (PBT), polycarbonate (PC), polyethylene terephthalate (PET) and polyethylene naphthalate (PEN), polyvinyl chloride (PVC), polyvinyl fluorides (PVF), polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), polyacrylate (PA), polymethyl methacrylate (PMMA), polyurethane (PUR), and / or mixtures and copolymers thereof. This means the invention allows for versatile adaptation to different optical and mechanical conditions.

[0016] According to a further embodiment of the invention, at least parts of the sensor arrangement are applied or embedded as wires on or in the combination film. Applying or embedding parts of the sensor arrangement on the combination film reduces production costs and allows for a thinner disc thickness.

[0017] In a further embodiment of the invention, the sensor arrangement comprises a planar, transparent, electrically conductive layer or several planar, transparent, electrically conductive layers, which are delimited by insulating dividing lines.

[0018] According to a further embodiment of the invention, the sensor arrangement and the hologram are arranged on a common section of the composite film or a substrate within the laminated glass pane. By placing them together on a common section, production costs can be reduced.

[0019] In a further embodiment, the hologram is designed so that it appears when illuminated in a way that reflects light towards the viewer. This means that the appearance and disappearance of a hologram can be controlled by targeted lighting, so that, for example, only active sensor arrays are recognizable as such, while inactive sensor arrays remain hidden. Furthermore, it is possible to generate different holograms depending on the viewer by using different lighting conditions, such as different angles or different light sources.

[0020] According to the invention, the hologram is designed such that a representation of the hologram appears under transmissive illumination with respect to the viewer. This means that the appearance / disappearance of a hologram can be controlled by external illumination, so that, for example, only certain sensor arrangements are recognizable as such, while inactive sensor arrangements remain hidden.

[0021] According to a further embodiment of the invention, a laminated glass pane arrangement according to the invention comprises a laminated glass pane and a light source which controllably illuminates the hologram so that it appears to the user. According to a further embodiment of the invention, the laminated glass pane according to the invention can be used in vehicles or buildings or as an information display. This means that the range of applications is very broad, so that the laminated glass pane according to the invention can be manufactured cost-effectively.

[0022] According to a further embodiment of the invention, the laminated glass pane according to the invention can be produced in a simple, cost-effective process comprising obtaining a hologram, introducing the hologram onto a combination film of the laminated glass pane, wherein the introduction step is selected from laminating or gluing onto the combination film, and completing the laminated glass pane.

[0023] According to the invention, the hologram is at least partially transparent.

[0024] Embodiments of the present invention are described by way of example with reference to the attached drawings, which show: Fig. 1 a schematic overview of a laminated glass pane with a state-of-the-art sensor arrangement, Fig. 2a schematic overview representation of a laminated glass pane according to the invention with a sensor arrangement in relation to a first user position, Fig. 3 a schematic overview representation of a laminated glass pane according to the invention with a sensor arrangement in relation to a second user position, Fig. 4 a schematic cross-section through a sensor arrangement according to the invention, Fig. 5 a schematic overview of a sensor arrangement according to the invention, and Fig. 6 a schematic cross-section through a hologram.

[0025] In Figure 2 is an exemplary situation according to embodiments of the invention schematically with respect to a user B 1 and in Figure 3 shown in relation to another person B 2.

[0026] The laminated glass pane 100 according to the invention comprises a sensor arrangement S touch or several sensor arrangements S touch, wherein the laminated glass pane 100 has a first glass layer GS 1 and a second glass layer GS 2, connected by at least one combination film F or a plurality of combination films F 1, F 2. The sensor arrangement(s) S touch is / are suitable for detecting the approach of a finger. The sensor area itself is identified by the fact that a hologram H is arranged at the location of the sensor arrangement, which becomes optically perceptible to an observer B 1 when illuminated, wherein the hologram H is arranged between the first glass layer GS 1 and the second glass layer GS 2.

[0027] That is analogous to Figure 1 is in Figure 2A sensor array S touch is depicted, located at the top edge of a laminated glass pane 100. To make this sensor array S touch recognizable, a hologram H is provided in relation to it. The hologram H can appear to user B 1 similarly to the markings M 1 and M 2. However, the hologram H is designed to be semi-transparent or even invisible to person B 2, who is not within reach of the sensor array S touch and cannot operate it. That is, the hologram H does not restrict person B 2's field of vision.

[0028] Such a situation is particularly advantageous for vehicle windows, as specific requirements are placed on the field of vision. For example, the S touch sensor arrangement might only be visible to the driver B1, e.g., for switching certain vehicle functions, while the passenger B2 cannot see the corresponding markings in the form of the hologram H. Conversely, if a suitable S touch sensor area is positioned within the reach of the passenger B2—e.g., for controlling climate control, windows, or a multimedia system—it can also be advantageous that it is only visible to the passenger B2, while remaining partially transparent or even invisible to the driver B1, thus not restricting their field of vision.

[0029] Using the hologram H, it is possible to provide position-selective markings, e.g., for identifying sensor arrangements. This exploits the fact that a user of a sensor arrangement is located within a specific angular range relative to the laminated glass pane 100, while another observer, located outside the range of the sensor arrangement, occupies a different angle relative to the sensor area.

[0030] The laminated glass pane 100 according to the invention is not limited to a specific sensor technology. Rather, the S touch sensor arrangement can be used in conjunction with a wide variety of sensor technologies. For example, the sensor arrangement comprises a capacitive sensor or an optical sensor. The S touch sensor arrangement(s) is suitable for detecting the approach of a finger. In the case of a capacitive sensor, the approach can be detected, for example, by a change in charge on a capacitor. In the case of an optical sensor, detection is possible, for example, by means of a shadow cast by a light-sensitive resistor or a photoelectric cell, or by means of a camera outside the laminated glass pane 100 that observes the sensor arrangement. Of course, not only the approach but also the direct placement of a finger on the sensor area can be detected.

[0031] The following description will focus in particular on capacitive sensors for detecting proximity. However, the invention is not limited to this.

[0032] In one embodiment of the invention, the hologram H is applied to the combination film F; F 1 , F 2.

[0033] In Figure 4 is an exemplary section through a laminated glass pane 100 along line AA' in Figure 2 shown.

[0034] There, between a glass pane GS 1 and a glass pane GS 2, for example, are two combination films F 1 and F 2. Here, for instance, the hologram can be applied to one of the films F 1 or F 2 at a suitable location, or a carrier T can be inserted into a cutout in the combination film F 1, F 2, or – as shown – inserted between the combination film F 1, F 2. The cut is in Figure 4This is only an example and further layers may be provided between the glass pane GS 1 and a glass pane GS 2.

[0035] The glass pane GS 1 and / or the glass pane GS 2 preferably contain glass, particularly preferably flat glass, float glass, quartz glass, borosilicate glass, soda-lime glass, or clear plastics, preferably rigid clear plastics, in particular polyethylene, polypropylene, polycarbonate, polymethyl methacrylate, polystyrene, polyamide, polyester, polyvinyl chloride and / or mixtures thereof.

[0036] The glass panes GS 1 and GS 2 are transparent, particularly for use as a windshield or rear window of a vehicle, or in other applications where high light transmission is desired. For the purposes of this invention, a laminated glass pane 100 is considered transparent if it has a transmission in the visible spectral range greater than 70%. However, for laminated glass panes 100 that are not located in the driver's field of vision relevant to traffic, such as roof windows, the transmission can be much lower, for example, greater than 5%.

[0037] The thickness of glass pane GS 1 and / or glass pane GS 2 can vary widely and thus be ideally adapted to the requirements of the individual case. Standard thicknesses of 1.0 mm to 25 mm are preferably used, more preferably 1.4 mm to 2.5 mm for vehicle glass, and more preferably 4 mm to 25 mm for furniture, appliances, and buildings, especially for electric radiators. The size of the laminated glass pane 100 can vary widely and depends on the size of the application according to the invention. The substrate and, optionally, the cover pane have areas of, for example, 200 cm² to 20 m², which are common in vehicle construction and architecture.

[0038] The laminated glass pane 100 can have any three-dimensional shape. Preferably, the three-dimensional shape has no shadow zone, so that it can be coated, for example, by cathode sputtering. Preferably, the substrates are planar or slightly or strongly curved in one or more directions. In particular, planar glass panes GS 1 and GS 2 are used. The glass pane GS 1 and / or GS 2 can be colorless or colored.

[0039] The glass disc GS 1 and / or the glass disc GS 2 preferably have a relative permittivity ε r,1 / 4 of 2 to 8 and particularly preferably of 6 to 8. With such relative permittivities, a particularly good distinction could be achieved between contact of the contact surface via the outer surface of the substrate and contact with the outer surface of the cover disc.

[0040] It is particularly advantageous if the combination film F; F 1 , F 2 contains at least one substance selected from the group comprising polybutylene terephthalate (PBT), polycarbonate (PC), polyethylene terephthalate (PET) and polyethylene naphthalate (PEN), polyvinyl chloride (PVC), polyvinyl fluorides (PVF), polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), polypropylene (PP), polyvinyl chloride (PVC), polyacrylate (PA), polymethyl methacrylate (PMMA), polyurethane (PUR), polyacetate resin, casting resins, acrylates, fluorinated ethylene propylenes, polyvinyl fluoride and / or ethylene tetrafluoroethylene and / or mixtures and copolymers thereof. The combination film F; F 1 , F 2 is transparent.

[0041] The intermediate layer between the first glass pane GS 1 and the second glass pane GS 2 can be formed by one or more superimposed combination films F; F 1 , F 2, wherein the thickness of a combination film F; F 1 , F 2 is preferably from 0.025 mm to 1 mm, typically 0.38 mm or 0.76 mm. The intermediate layers are preferably thermoplastic and, after lamination, can bond the glass pane GS 1, the glass pane GS 2, and any further intermediate layers together. The intermediate layer preferably has a relative permittivity of 2 to 4 and particularly preferably from 2.1 to 2.9. With such relative permittivities, a particularly good differentiation between contact of the contact surface via the outer surface of the glass pane GS 2 and the outer surface of the glass pane GS 1 could be achieved.

[0042] The carrier T is preferably a transparent film. The carrier T preferably contains or consists of a polyethylene terephthalate (PET) film. The thickness of the carrier T is preferably from 0.025 mm to 0.1 mm. The carrier preferably has a relative permittivity of 2 to 4 and particularly preferably from 2.7 to 3.3. Particularly good laminated glass panes 100 can be produced with such a carrier T, since such thin carriers T can be easily and optically unobtrusively integrated into the laminated glass pane 100, even when arranged only in sections. At the same time, good and selective switching signals can be generated.

[0043] It is also advantageous if, for example, parts of the sensor arrangement S touch are applied or inserted as wires on or in the combination film F; F 1 , F 2 or on the carrier T.

[0044] This will be illustrated below using the example of a capacitive sensor in relation to Figure 4 and 5 explained.

[0045] For example, an electrically conductive layer L can be arranged on the substrate T. The electrically conductive layer L preferably contains a transparent, electrically conductive coating. Transparent here means permeable to electromagnetic radiation, preferably electromagnetic radiation with a wavelength of 300 nm to 1,300 nm and especially to visible light.

[0046] Electrically conductive layers L according to the invention are known, for example, from DE 20 2008 017 611 U1, EP 0 847 965 B1 or WO2012 / 052315 A1. They typically contain one or more, for example, two, three, or four electrically conductive, functional layers. The functional layers preferably contain at least one metal, for example, silver, gold, copper, nickel, and / or chromium, or a metal alloy. The functional layers particularly preferably contain at least 90 wt.% of the metal, and in particular at least 99.9 wt.% of the metal. The functional layers can consist of the metal or the metal alloy. The functional layers particularly preferably contain silver or a silver-containing alloy. Such functional layers exhibit particularly advantageous electrical conductivity with simultaneously high transmission in the visible spectral range.The thickness of a functional layer is preferably from 5 nm to 50 nm, particularly preferably from 8 nm to 25 nm. Within this thickness range of the functional layer, advantageously high transmission in the visible spectral range and particularly advantageous electrical conductivity are achieved.

[0047] Typically, at least one dielectric layer is arranged between each pair of adjacent functional layers. Preferably, another dielectric layer is arranged below the first and / or above the last functional layer. A dielectric layer contains at least one layer of a dielectric material, for example, a nitride such as silicon nitride or an oxide such as aluminum oxide. The dielectric layer can also comprise several layers, for example, layers of a dielectric material, smoothing layers, matching layers, blocker layers, and / or antireflection layers. The thickness of a dielectric layer is, for example, from 10 nm to 200 nm.

[0048] This layer structure is generally obtained through a series of deposition processes carried out by a vacuum process such as magnetic field-assisted cathode sputtering.

[0049] Other suitable electrically conductive layers L preferably contain indium tin oxide (ITO), fluorine-doped tin oxide (SnO 2 :F) or aluminum-doped zinc oxide (ZnO:Al).

[0050] The electrically conductive layer L can, in principle, be any coating that can be electrically contacted. If the laminated glass pane 100 according to the invention is intended to allow transparency, as is the case, for example, with panes in window applications, the electrically conductive layer L is preferably transparent. In an advantageous embodiment, the electrically conductive layer L is a layer or a layer structure of several individual layers with a total thickness of less than or equal to 2 µm, particularly preferably less than or equal to 1 µm.

[0051] In the illustrated embodiment, the design and configuration of the sensor electronics are such that a switching signal is triggered when the outer surface IV of the glass pane GS 1 is touched above the contact area 11 of the capacitive switching area, while no switching signal is triggered when the outer surface I of the glass pane GS 2 is touched above the capacitive switching area. For this purpose, the thicknesses and materials of the composite pane 100 according to the invention are selected such that the surface capacitance cI between the contact area 11 and the outer surface IV of the glass pane GS 1 is greater than the surface capacitance cA between the contact area 11 and the outer surface I of the glass pane GS 2.

[0052] The area capacitance c I or c A is defined within the scope of the present invention as the capacitance of a plate capacitor of that area of ​​the laminated glass pane 100 which results from orthogonal projection of the contact area 11 between the contact area 11 and the outer surface IV of the glass pane GS 1 or the outer surface I of the glass pane GS 2, wherein the resulting capacitance is normalized to the area of ​​the contact area.

[0053] In the Figure 4 In the detailed example, the area capacitance CI between the contact area 11 and the outer surface IV of the glass pane GS 1 results from the series connection of the individual capacitance layers. 1 C I = 1 C 1 + 1 C 2 , where the individual capacitance per unit area is given by ci = ε₀ * ε₀r,i / di. This corresponds to the capacitance C₭ of the respective individual layer with relative permittivity ε₀r,i and thickness di, normalized to the area A of the contact area 11, i.e., ci = C₭ / A. Analogously, the area capacitance per unit area c₁ between the contact area 11 and the outer surface I of the cover plate 4 is given by the series connection of the individual capacitance per unit area. 1 C A = 1 C 3 + 1 C 4 .

[0054] Furthermore, the laminated glass pane can also have a low-E coating on the inner surface IV of the laminated glass pane 100, wherein at least one capacitive switching area is electrically separated from the low-E coating by at least one coating-free dividing line U.

[0055] In the context of vehicle glazing, architectural glazing, and building glazing, the outer surface of the laminated glass pane 100 refers to the surface of the pane facing outwards, away from the (vehicle) interior. The inner surface, therefore, refers to the surface of the laminated glass pane 100 facing the (vehicle) interior.

[0056] This low-E coating contains at least one functional layer and optionally one or more adhesive layers, barrier layers, and / or antireflective layers. The low-E coating is preferably a layer system consisting of at least one adhesive layer, one functional layer, one barrier layer, one antireflective layer, and one further barrier layer.

[0057] Particularly suitable low-E coatings contain a functional layer of at least one electrically conductive oxide (TCO), preferably indium tin oxide (ITO), fluorine-doped tin oxide (SnO 2 :F), antimony-doped tin oxide (SnO 2 :Sb), aluminum-doped zinc oxide (ZnO:Al) and / or gallium-doped zinc oxide (ZnO:Ga).

[0058] Particularly advantageous low-E coatings have an interior emissivity of the laminated glass pane 100 according to the invention of less than or equal to 60%, preferably less than or equal to 45%, particularly preferably less than or equal to 30%, and especially less than or equal to 20%. Interior emissivity refers to the measure that indicates how much thermal radiation the pane, in its installed position, emits into an interior space, for example, of a building or a vehicle, compared to an ideal thermal radiator (a black body). Emissivity is understood to mean the normal total emissivity at 283 K according to standard EN 12898.

[0059] In an advantageous embodiment, the surface resistance of such an exemplary low-E coating is from 10 ohms / square to 200 ohms / square, and preferably from 10 ohms / square to 100 ohms / square, particularly preferably from 15 ohms / square to 50 ohms / square, and especially from 20 ohms / square to 35 ohms / square.

[0060] The absorption of the low-E coating in the visible spectral range is preferably from about 1% to about 15%, and particularly preferably from about 1% to about 7%. The absorption of the coating can be determined by measuring the absorption of a coated disk and subtracting the absorption of the uncoated disk. For example, when reflected, the disk preferably exhibits a color value a* of -15 to +5 and a color value b* of -15 to +5, as viewed from the side provided with the low-E coating according to the invention. The values ​​a* and b* refer to the color coordinates according to the colorimetric model (L*a*b* color space).

[0061] A beneficial low-E coating exhibits low absorption and low reflection in the visible spectral range, and therefore high transmission. Low-E coatings can thus be used on glass surfaces where a significant reduction in transmission is undesirable, for example, in building windows, or is prohibited by law, for example, in windshields or front side windows of motor vehicles.

[0062] Another advantageous transparent electrically conductive layer L can also have a sheet resistance of 0.4 ohms / square to 200 ohms / square. In a particularly preferred embodiment, the electrically conductive layer according to the invention has a sheet resistance of 0.5 ohms / square to 20 ohms / square.

[0063] Coatings with such surface resistances are suitable, among other things, for heating vehicle windows at typical on-board voltages of 12 V to 48 volts or in electric vehicles with typical on-board voltages of up to 500 V.

[0064] Transparent, electrically conductive layers L can, for example, be electrically heated, have IR-reflective properties, or exhibit low-E properties.

[0065] In one embodiment of the invention, the sensor arrangement S touch has at least one planar, transparent, electrically conductive layer L, which is bounded by insulating dividing lines U.

[0066] This is exemplified in Figure 5The figure shows a corresponding capacitive sensor formed on a substrate T with an electrically conductive coating L. This sensor has two relatively large areas, A1 and A2, located at the upper end of the figure. The areas are connected via connections V1 and V2 to exemplary terminals AN1 and AN2. Terminals AN1 and AN2 are connected to exemplary sensor evaluation electronics via two flat ribbon terminals, K1 and K2, which are attached using solder. Other sensor configurations, particularly wireless sensors, are not explicitly excluded. Using the structuring U, which can be created, for example, by masking during the coating process or by ablation after coating, conductors and capacitance plates can be formed, similar to the production of printed circuit boards. Examples include, for instance...The plate A2, connections V2, and terminal A2 are formed from the electrically conductive layer L by means of the separation line U. The plate A1, connections V1, and terminal A1 are formed from the electrically conductive layer L by means of another separation line U. These separation line(s) U can be structured, for example, by laser ablation.

[0067] It is readily possible to arrange both parts of the sensor arrangement S touch and the hologram H on a common section of the combination film F; F 1 , F 2 or a carrier T within the laminated glass pane 100.

[0068] This will be discussed below with reference to Figure 6 The typical structure of conventional holograms H, which are used, for example, for product security (origin identification, etc.) and which can also be used in laminated glass panes 100 according to the invention, is briefly explained.

[0069] Typically, a holographic structure (a structure exhibiting a different thickness profile and / or refractive index profile) is produced by (hot) embossing an embossable lacquer, for example, onto an exemplary PET film of exemplary thickness 19 µm - 50 µm.

[0070] Obviously, this PET film can also serve as a carrier T for electrical layers L of the sensor arrangement S touch.

[0071] Typically, such a PET film has a tensile strength of approximately 24 kgf / mm², an elongation at break of 120%–150%, and a heat shrinkage of 1% or less at 150°C for 30 minutes. Typically, such PET films exhibit a turbidity of 1% and a light transmission of 90%.

[0072] Such a substrate T can, for example, be coated with a highly reflective metallization M, and further layers can also be applied. The metallization M can, for example, be based on ZnS, which has a refractive index of 2.3–2.4 and a reflectivity of 35%.

[0073] Depending on requirements, a coating C1 may be applied to the side facing away from the viewer. This coating C1 can, for example, allow printing with non-holographic elements.

[0074] Depending on requirements, a separating layer RC may be present on the side facing the viewer. Furthermore, a second coating C 2 may be optionally provided, which, for example, carries the embossable lacquer PL.

[0075] The type of hologram H has not been addressed in the preceding description.

[0076] It is essential that the hologram is sensitive to the position of a viewer. That is, the hologram H is designed so that it is illuminated by ambient light and also by targeted illumination, either by lighting integrated into the disc / sensor arrangement using suitable (organic) light-emitting diodes (p)LEDs, or by a light source arranged outside the laminated glass disc 100, in such a way that the user of the sensor arrangement S touch can locate the sensor arrangement.

[0077] This means that the hologram H can, for example, be designed in such a way that a representation of the hologram H appears under a reflective lighting in relation to the viewer.

[0078] This means that the appearance / disappearance of a hologram can be controlled through targeted lighting, so that, for example, only active sensor arrays are recognizable as such, while inactive sensor arrays remain hidden. Furthermore, it is possible to create the appearance of different holograms in relation to the viewer by using different lighting, e.g., different angles / different light in relation to the laminated glass pane 100 or an embossed hologram H.

[0079] According to the invention, it is provided that a representation of the hologram H appears under a transmissive illumination with respect to the viewer.

[0080] This means that the appearance / disappearance of a hologram can be controlled by external lighting, so that, for example, only certain sensor arrangements are recognizable as such, while inactive sensor arrangements remain hidden.

[0081] Thus, the hologram H can also have several superimposed representations, which are displayed in relation to the user depending on the lighting (e.g. the angle of the lighting).

[0082] One embodiment of the invention shows a laminated glass pane arrangement comprising a laminated glass pane 100 and a light source, wherein the light source controllably illuminates the hologram H so that it appears to the user.

[0083] The light source preferably comprises an LED or OLED. Its particular advantages lie in its small dimensions and low power consumption. The wavelength range emitted by the light source can be freely selected within the visible light spectrum, for example, according to practical and / or aesthetic considerations. The light source can include optical elements, particularly for directing the light, preferably a reflector and / or an optical waveguide, such as an optical fiber or a polymer optical fiber. The light source can be arranged at any point (relative to) the glass pane GS 1 or the glass pane GS 2, particularly at the side edge of the glass pane GS 1 or the glass pane GS 2, or in a small recess in the center of the glass pane GS 1 or the glass pane GS 2.

[0084] The light deflecting agent preferably has particles, dot patterns, stickers, deposits, indentations, scratches, line patterns, imprints and / or screen prints and is suitable for extracting the light transported in the glass pane GS 1 or the glass pane GS 2 from the same.

[0085] The light deflection device can be positioned at any location on the plane of the glass pane GS 1 or the glass pane GS 2. It is particularly advantageous if the light deflection device is located in or in the immediate vicinity of the touch area, thus enabling quick detection of the otherwise barely visible touch area of ​​the sensor assembly S touch. This is especially beneficial at night or in darkness.

[0086] Alternatively, light can be guided to the touch area of ​​the sensor arrangement S touch and marked by a light guide arranged on the glass disc GS 1 or the glass disc GS 2, or an intermediate layer (e.g. the combination film F, F 1 , F 2 ).

[0087] Alternatively or in combination, the light source together with the light deflection device can visualize information on the disc, for example, displaying the switching state of the capacitive switching area or indicating whether, for example, an electrical function is switched on or off.

[0088] According to a further embodiment of the invention, the laminated glass pane 100 according to the invention can be used in vehicles or buildings or as an information display.

[0089] This means that the range of applications is very high, so that the laminated glass panes according to the invention can be manufactured cost-effectively.

[0090] In an exemplary process for manufacturing a laminated glass pane 100, a hologram H is first obtained. This hologram H can be part of the sensor arrangement S touch or an independent hologram H (e.g., on a carrier T). The obtained hologram H is incorporated into a pre-product of the laminated glass pane 100, whereby the incorporation step is selected from lamination, bonding, or application. After incorporation and any further intermediate steps with regard to the sensor arrangement, the laminated glass pane 100 is completed.

[0091] The use of holograms H makes the sensor arrangement S touch position-sensitive. The invention takes advantage of the fact that a user B 1 is positioned at a typical distance (approximately 60 cm) in front of the laminated glass pane 100, enabling them to operate the sensor of the sensor arrangement S touch. The hologram H is designed such that, with appropriate light incidence, it is clearly visible at this distance and when viewed from a specific angle, while it becomes partially transparent or even completely invisible to viewers at other distances and / or angles.

[0092] While ambient light is generally sufficient during the day to make a hologram H visible to viewer B1, external lighting may be necessary in darkness to make the hologram H visible again. This light source can be appropriately positioned. For example, in a vehicle, it could be located on the headliner, dashboard, A-pillar, in a rearview mirror mount, etc., so that the light from the source does not disturb viewer B1.

[0093] Another advantage of holograms H is that they are not visible on the side facing away from the user. For example, a sensor array S touch and its corresponding hologram H are positioned so that they are visible on the inside of a vehicle. On the outside, however, the hologram H is not visible. Therefore, the location of the sensor array S touch is not readily apparent, thus making it more difficult to locate it, or at least not easily, and thus preventing incorrect operation from the outside.

[0094] In addition, further functionality can be provided via the holograms. For example, it is possible to present the manufacturer and / or provide a certificate of authenticity. This is often advantageous for safety-critical components.

Claims

1. Laminated glass pane (100) having a sensor assembly (Stouch), wherein the laminated glass pane has a transparent first glass layer (GS1) and a transparent second glass layer (GS2) joined by a transparent combina tion film (F; F1; F2), wherein the sensor assembly (Stouch) is suitable for detecting the approach of a finger, characterized in, that - an at least semi-transparent hologram (H) is arranged at the location of the sensor assembly, which hologram becomes visible to a viewer upon illumination, - the hologram (H) is arranged between the first glass layer (GS1) and the second glass layer (GS2), and - a view of the hologram (H) appears upon transmissive illumination in relation to the viewer by external illumination.

2. Laminated glass pane (100) according to claim 1, wherein a further view of the hologram (H) appears upon reflective illumination in relation to the viewer by selective illumination.

3. Laminated glass pane (100) according to claim 1 or 2, wherein the sensor assembly (Stouch) has a capacitive sensor or an optical sensor.

4. Laminated glass pane (100) according to one of claims 1 through 3, wherein the hologram (H) is applied on the combination film (F).

5. Laminated glass pane (100) according to one of claims 1 through 4, wherein the combination film (F; F1, F2) contains at least one material selected from the group comprising polybutylene terephthalate (PBT), polycarbonate (PC), polyethylene terephthalate (PET) and polyethylene naphthalate (PEN), polyvinyl chloride (PVC), polyvinyl fluoride (PVF), polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), polyacrylate (PA), polymethyl methacrylate (PMMA), polyurethane (PUR), and / or mixtures and copolymers thereof.

6. Laminated glass pane (100) according to one of claims 1 through 5, wherein at least parts of the sensor assembly (Stouch) are applied or introduced as wires on or in the combination film (F; F1, F2).

7. Laminated glass pane (100) according to one of claims 1 through 6, wherein the sensor assembly (Stouch) has at least one planar, transparent, electrically conductive layer (TES), which is delimited by insulating separating lines (U).

8. Laminated glass pane (100) according to one of claims 1 through 7, wherein at least parts of the sensor assembly (Stouch) and the hologram (H) are arranged on a common section of the combination film (F; F1, F2) or a carrier (T) within the laminated glass pane (100).

9. Use of a laminated glass pane ( 100) according to one of claims 1 through 8 in vehicles or buildings or as an information display.

10. Method for producing a laminated glass pane (100) according to one of claims1 through 8, comprising the steps: - obtaining a hologram (H), - introducing the hologram (H) on a combination film (F; F1, F2) of the laminated glass pane, wherein the step of the introduction is selected from laminating or gluing on the combination film (F; F1, F2), - completing the laminated glass pane (1).