EP4288283A1 - Vitre composite comprenant une fenêtre de caméra pouvant être chauffée électriquement - Google Patents

Vitre composite comprenant une fenêtre de caméra pouvant être chauffée électriquement

Info

Publication number
EP4288283A1
EP4288283A1 EP22713291.7A EP22713291A EP4288283A1 EP 4288283 A1 EP4288283 A1 EP 4288283A1 EP 22713291 A EP22713291 A EP 22713291A EP 4288283 A1 EP4288283 A1 EP 4288283A1
Authority
EP
European Patent Office
Prior art keywords
pane
electrically conductive
camera window
transparent coating
coating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22713291.7A
Other languages
German (de)
English (en)
Inventor
Jefferson DO ROSARIO
Stephan GILLESSEN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saint Gobain Glass France SAS
Compagnie de Saint Gobain SA
Original Assignee
Saint Gobain Glass France SAS
Compagnie de Saint Gobain SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saint Gobain Glass France SAS, Compagnie de Saint Gobain SA filed Critical Saint Gobain Glass France SAS
Publication of EP4288283A1 publication Critical patent/EP4288283A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/84—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields
    • H05B3/86—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields the heating conductors being embedded in the transparent or reflecting material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
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    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
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    • B32B17/10174—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
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    • B32B17/10174—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
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    • B32B17/10211—Doped dielectric layer, electrically conductive, e.g. SnO2:F
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    • B32B17/10174—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
    • B32B17/10238—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer in the form of particles
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    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10247—Laminated safety glass or glazing containing decorations or patterns for aesthetic reasons
    • B32B17/10256—Laminated safety glass or glazing containing decorations or patterns for aesthetic reasons created by printing techniques
    • B32B17/10266—Laminated safety glass or glazing containing decorations or patterns for aesthetic reasons created by printing techniques on glass pane
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    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10339—Specific parts of the laminated safety glass or glazing being colored or tinted
    • B32B17/10348—Specific parts of the laminated safety glass or glazing being colored or tinted comprising an obscuration band
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    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10431—Specific parts for the modulation of light incorporated into the laminated safety glass or glazing
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    • B32B17/10899—Making laminated safety glass or glazing; Apparatus therefor by introducing interlayers of synthetic resin
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    • H—ELECTRICITY
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    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
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    • H05B2203/002—Heaters using a particular layout for the resistive material or resistive elements
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/011—Heaters using laterally extending conductive material as connecting means
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/013—Heaters using resistive films or coatings

Definitions

  • the invention relates to a laminated pane with an electrically heatable camera window, in particular for camera systems, a method for its production and its use.
  • Composite panes made of two or more glass or polymer panes are used in vehicles as windshields, rear windows, side windows and roof windows.
  • One or more functional coatings which have infrared-reflecting properties, anti-reflective properties or low-E properties can be arranged on individual sides of the panes.
  • Modern vehicles are increasingly being equipped with sensors, in particular with a large number of driver assistance systems with optical sensors. These include, for example, optical cameras, but also radar systems, ultrasonic sensors and light detection and ranging (LiDaR). Camera systems are placed in motor vehicles behind the windshield in the passenger compartment. They thus offer a good view of the area around the vehicle and can identify dangerous situations and obstacles in road traffic in good time.
  • optical sensors include, for example, optical cameras, but also radar systems, ultrasonic sensors and light detection and ranging (LiDaR).
  • LiDaR light detection and ranging
  • the camera system is usually protected from the effects of the weather by appropriate panes.
  • the panes should be as clean and free from fogging as possible to ensure the functionality of the sensors. Since fogging and icing have a significant effect on the transmission of electromagnetic waves, the pane should be cleared of them as quickly as possible. Wiping systems ensure that the pane is freed from water droplets and protective particles. However, they are unusable in icing conditions, which is why the affected pane segment, which serves as the field of view for the camera, has to be heated for a short period of time.
  • EP 1 605 729 A2 discloses an electrically heatable pane with a camera window.
  • the camera window is kept fog-free and ice-free with a heating device.
  • the heating element is laminated into the pane at the position of the camera window, with the heating element being located adjacent to a field of view.
  • the object of the present invention is to provide a composite pane with an electrically heatable camera window that provides improved heating performance of the camera window.
  • the laminated pane according to the invention with an electrically heatable camera window comprises at least one outer pane and one inner pane, which are connected to one another over at least one thermoplastic intermediate layer.
  • the outer pane has a first surface (I) facing away from the intermediate layer and a second surface (II) facing towards the intermediate layer.
  • the inner pane has a first surface (III) facing the intermediate layer and a second surface (IV) facing away from the intermediate layer.
  • the laminated pane comprises at least one optically transparent camera window and, inside the camera window, a first electrically conductive, transparent coating for heating the camera window.
  • the first coating is particularly preferably applied essentially over the entire surface of the first surface (III) of the inner pane within the camera window.
  • essentially means that the camera window can have additional communication windows with no coating and the values can deviate by up to 30%.
  • the first coating has bus bars provided for connection to a voltage source, which are arranged on two opposite sides of the camera window in such a way that when an electrical voltage is applied to the bus bars, a current flows through the first coating.
  • the laminated pane of the present invention provides a significant improvement in the form of rapid heating of the camera window.
  • the direct arrangement of the low-impedance busbars in the camera window results in a homogeneous heat distribution and a fast-acting heat output within the camera window.
  • a composite pane according to the invention achieves significantly improved heating performance within the camera window compared to the previously known windshields.
  • the composite pane can be used in many ways: In the case of a composite pane as a window pane of a vehicle pane, it can be, for example, a roof pane, in particular a windshield, a rear pane or a side pane.
  • the laminated pane according to the invention with an electrically heatable camera window is used to separate an interior from an external environment. It includes the inner pane and outer pane.
  • all electrically insulating substrates that are thermally and chemically stable and dimensionally stable under the conditions of production and use of the laminated pane according to the invention are suitable as the inner pane and outer pane.
  • the inner pane and the outer pane 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.
  • the inner pane and the outer pane are preferably transparent, particularly for use of the pane as a windshield or rear window of a vehicle or other uses where high light transmission is desired.
  • a pane that has a transmission in the visible spectral range of more than 70% is then understood to be transparent within the meaning of the invention.
  • the transmission can also be much lower, for example greater than 5%.
  • the thickness of the pane can vary widely and can thus be perfectly adapted to the requirements of the individual case.
  • Panes with standard thicknesses of 1.0 mm to 25 mm, preferably 1.4 mm to 2.5 mm, are preferably used for vehicle glass.
  • the size of the disc can vary widely and depends on the size of the use according to the invention.
  • the inner pane and optionally the outer pane have areas of 200 cm 2 up to 20 m 2 , which are common in vehicle construction, for example.
  • the composite pane can have any three-dimensional shape.
  • the three-dimensional shape has no shadow zones so that it can be coated by, for example, sputtering.
  • the substrates are planar or slightly or greatly curved in one or more directions of space. In particular, planar substrates are used.
  • the discs can be colorless or colored.
  • the intermediate layer preferably contains at least one thermoplastic, preferably polyvinyl butyral (PVB), ethylene vinyl acetate (EVA) and/or polyethylene terephthalate (PET).
  • thermoplastic intermediate layer can also, for example, be polyurethane (PU), polypropylene (PP), polyacrylate, polyethylene (PE), polycarbonate (PC), polymethyl methacrylate, polyvinyl chloride, polyacetate resin, casting resin, acrylate, fluorinated ethylene-propylene, polyvinyl fluoride and/or ethylene Tetrafluoroethylene, or copolymers or mixtures thereof.
  • the thermoplastic intermediate layer can be formed by one or more thermoplastic films arranged one on top of the other, the thickness of a thermoplastic film preferably being from 0.25 mm to 1 mm, typically 0.38 mm or 0.76 mm.
  • the first surface (III) of the inner pane and the second surface (II) of the outer pane face each other and are connected to one another via the thermoplastic intermediate layer.
  • the second surface (IV) of the inner pane and the first surface (I) of the outer pane face away from each other and from the thermoplastic intermediate layer.
  • the camera window has an optical transparency, i.e. the transmission is in the wavelength range from 400 nm to 1300 nm, preferably more than 70%.
  • the camera window preferably takes up less than 10%, particularly preferably less than 5%, of the pane surface.
  • the camera window preferably has the shape of a square, a rectangle, a rhombus, a trapezium, a hexagon, an octagon, a cross, an oval or a circle.
  • the first electrically conductive coating is applied to the first surface (III) of the inner pane.
  • a further electrically conductive coating can also be applied to the second surface (II) of the outer pane.
  • Electrically conductive, transparent coatings according to the invention are known, for example, from EP 0 847 965 B1 or WO 2017/198362 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% by weight of the metal, in particular at least 99.9% by weight of the metal.
  • the functional layers can consist of the metal or the metal alloy.
  • the functional layers particularly preferably contain silver or an alloy containing silver. Such functional layers have a special advantageous electrical conductivity with simultaneous 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. In this range for the thickness of the functional layer, an advantageously high transmission in the visible spectral range and a particularly advantageous electrical conductivity are achieved .
  • At least one dielectric layer is typically arranged in each case between two adjacent functional layers of the coating.
  • a further dielectric layer is preferably arranged below the first and/or above the last functional layer.
  • a dielectric layer contains at least a single layer of a dielectric material, for example containing a nitride such as silicon nitride or an oxide such as aluminum oxide.
  • dielectric layers can also comprise a plurality of individual layers, for example individual layers of a dielectric material, smoothing layers, matching layers, blocking layers and/or antireflection layers.
  • the thickness of a dielectric layer is, for example, from 10 nm to 200 nm.
  • This layer structure is generally obtained by a sequence of deposition operations carried out by a vacuum process such as magnetic field-assisted sputtering.
  • ITO indium tin oxide
  • SnO2:F fluorine-doped tin oxide
  • ZnO:Al aluminum-doped zinc oxide
  • the first electrically conductive, transparent coating can be any coating that can be electrically contacted and has sufficient transparency.
  • the electrically conductive coating is a layer or a layer structure of several individual layers with a total thickness of less than or equal to 2 ⁇ m, particularly preferably less than or equal to 1 ⁇ m.
  • An advantageous electrically conductive coating according to the invention has a surface resistance of 0.4 ohms/square to 10 ohms/square.
  • the electrically conductive coating according to the invention has a surface resistance of 0.5 ohms/square to 1.5 ohms/square, in particular 1.3 ohms/square. Coatings with surface resistances of this type are particularly suitable for heating vehicle windows with typical on-board voltages of 12 V to 48 V or in electric vehicles with typical on-board voltages of up to 500 V.
  • the first electrically conductive, transparent coating has two busbars for electrical contacting. The electrical contact between the electrically conductive coating and the electrical power supply is made via the bus bars.
  • the busbars can be arranged in strips on two opposite sides of the first, electrically conductive coating. In particular, they can be designed as two strips running approximately parallel. The busbars are spaced at a maximum distance of 40 cm from each other.
  • the busbars can have a width of 2 mm to 30 mm, particularly preferably 4 mm to 20 mm. Busbars of this type are technically easy to implement in the production process and have an advantageous current-carrying capacity, so that good results can be achieved with regard to rapid heating.
  • the length of the bus bar depends on the extent of the camera window or the area to be heated.
  • the length of the bus bars is typically substantially equal to the length of the side edge of the first electrically conductive transparent coating, but can also be slightly less. In the case of busbars of this type, the longer of its dimensions is referred to as the length and the shorter of its dimensions is referred to as the width. More than two busbars can also be arranged on the first electrically conductive coating, preferably in the edge area along two opposite side edges of the first electrically conductive, transparent coating.
  • the layer thickness of the printed bus bars is preferably from 5 ⁇ m to 40 ⁇ m, particularly preferably from 8 ⁇ m to 20 ⁇ m and very particularly preferably from 8 ⁇ m to 12 ⁇ m.
  • Printed busbars with these thicknesses are technically easy to implement and have an advantageous current-carrying capacity.
  • the specific resistance p a of the bus bars is preferably from 0.8 pOhm.cm to 7.0 pOhm.cm and particularly preferably from 1.0 pOhm.cm to 2.5 pOhm.cm. Busbars with specific resistances in this range are technically easy to implement and have an advantageous current-carrying capacity. Good results are achieved with this.
  • the printed busbars preferably contain at least one metal, a metal alloy, a metal compound and/or carbon, particularly preferably a precious metal and in particular silver.
  • the printing paste preferably contains metallic particles, metal particles and/or carbon and in particular precious metal particles such as silver particles.
  • the electrical conductivity is preferably achieved by the electrically conductive particles.
  • the particles can be in an organic and / or inorganic matrix such as pastes or inks, preferably as a printing paste with glass frits.
  • the bus bar can also be designed as a strip of an electrically conductive foil.
  • the busbar 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 ⁇ m to 500 ⁇ m, particularly preferably 30 ⁇ m to 300 ⁇ m.
  • Busbars made of electrically conductive foils with these thicknesses are technically easy to implement and have an advantageous current-carrying capacity.
  • the strip can be electrically conductively connected to the electrically conductive structure, for example via a soldering compound, via an electrically conductive adhesive or by direct application. These materials and their thicknesses are particularly advantageous with regard to the very good conductivity of the busbars.
  • the busbars are electrically contacted by one or more leads.
  • the supply line is preferably in the form of a flexible film conductor (flat conductor, ribbon conductor). This is understood to mean an electrical conductor whose width is significantly greater than its thickness.
  • a foil conductor is, for example, a strip or tape containing or consisting of copper, tinned copper, aluminum, silver, gold or alloys thereof.
  • the foil conductor has, for example, a width of 2 mm to 16 mm and a thickness of 0.03 mm to 0.1 mm.
  • the foil conductor can have an insulating, preferably polymeric, sheathing, for example based on polyimide.
  • Foil conductors that are suitable for contacting electrically conductive coatings in panes only have a total thickness of 0.3 mm, for example. Such thin foil conductors can be embedded without difficulty between the individual discs in the thermoplastic intermediate layer.
  • a foil conductor strip can contain several conductive layers that are electrically insulated from one another.
  • thin metal wires can also be used as the electrical supply line.
  • the metal wires contain in particular copper, tungsten, gold, silver or aluminum or alloys of at least two of these metals.
  • the alloys can also contain molybdenum, rhenium, osmium, iridium, palladium or platinum.
  • the laminated pane has a second electrically conductive, transparent coating on the first surface (III) of the inner pane, it being possible for the first and the second electrically conductive, transparent coating to be the same.
  • the first electrically conductive, transparent coating and the second electrically conductive, transparent coating exhibit infrared-reflecting properties.
  • the laminated pane according to the invention has a coating-free separating line for electrically isolating the first coating from the second coating.
  • the dividing line can border the camera window at least partially, in particular completely.
  • the first electrically conductive, transparent coating inside the camera window is separated from the second electrically conductive, transparent coating and is insulated from it without short circuits.
  • the second electrically conductive, transparent coating is then arranged outside the camera window on the first surface (III) of the inner pane.
  • the second electrically conductive, transparent coating can preferably be current-free. In particular, it is not intended as a heating layer.
  • the dividing line can have a width of 30 ⁇ m to 200 ⁇ m, in particular from 80 ⁇ m to 120 ⁇ m.
  • the camera window has at least one coating-free communication window for the transmission of electromagnetic radiation, the communication window having an area of 10% to 30% of the area of the camera window.
  • the laminated pane is preferably a window pane of a vehicle which is inserted into or intended for a window opening of the vehicle body.
  • the present invention includes the laminated pane according to the invention as a windshield.
  • the inner pane and outer pane are laminated to one another via the intermediate layer, for example by autoclave methods, vacuum bag methods, vacuum ring methods, calendering methods, vacuum laminators or combinations thereof.
  • the outer pane and inner pane are usually connected under the action of heat, vacuum and/or pressure.
  • the inner pane designates that pane which is intended to face the interior of the vehicle in the installed position.
  • the outer pane designates that pane which is intended to face the outer surroundings of the vehicle in the installed position.
  • the present invention includes a method for producing the laminated pane according to the invention with an electrically heatable camera window, wherein
  • the first electrically conductive, transparent coating is applied to at least part of the first surface (III) of the inner pane
  • the two bus bars are applied to the first, electrically conductive, transparent coating on two opposite sides of the camera window, with the bus bars being arranged in such a way that when an electrical voltage is applied to the bus bars, a current flows through the first coating,
  • the first surface (III) of the inner pane with the electrically conductive, transparent coating is connected to the surface (II) of the outer pane via the thermoplastic intermediate layer.
  • the electrically conductive coating of the first, electrically conductive, transparent coating can be applied by methods known per se, preferably by cathode sputtering supported by a magnetic field. This is particularly advantageous with regard to a simple, quick, inexpensive and uniform coating of the first pane.
  • the electrically conductive coating can also be applied, for example, by vapor deposition, chemical vapor deposition (CVD), plasma-enhanced vapor deposition (PECVD) or by wet-chemical methods.
  • the bus bars are preferably applied by printing and baking an electrically conductive paste in a screen printing process or in an inkjet process.
  • the bus bar can be applied to the electrically conductive coating as a strip of an electrically conductive film, preferably laid on, soldered on or glued on.
  • the lateral shape is created by masking the fabric through which the printing paste with the metal particles is pressed.
  • the width of the busbar can be predetermined and varied in a particularly simple manner.
  • the production (decoating) of individual coating-free zones in the electrically conductive coating is preferably carried out using a laser beam.
  • Methods for structuring thin metal films are known, for example, from EP 2 200 097 A1.
  • the present invention includes the use of the composite pane according to the invention with a heatable camera window in vehicles, ships, airplanes and helicopters, preferably as a windscreen and/or rear window.
  • FIG. 1 shows a plan view of an embodiment of the laminated pane according to the invention with an electrically heatable camera window
  • FIG. 2 shows an enlarged representation of the camera window from FIG.
  • Figure 3 is a cross-sectional view along line AA' from Figure 2
  • Figure 4 is a cross-sectional view of the camera window along line B-B' of Figure 2
  • FIG. 5 shows a flow chart of an embodiment of the method according to the invention.
  • FIG. 1 shows a plan view of a preferred embodiment of the inventive laminated pane 10 with a heatable camera window 2.
  • the laminated pane 10 can serve as a windshield of a passenger car.
  • the camera window 2 is arranged in the middle of the upper edge area of the laminated pane 10 as a windshield.
  • the camera window 2 serves as a view for a camera 5 (FIG. 3) or a camera system.
  • the camera window 2 is defined as a region of the optical beam path of the camera 5 or of the camera system through the laminated pane 10, in particular an inner pane 1 (from FIG. 3).
  • a first electrically conductive, transparent coating 6.1 is applied completely inside the camera window 2.
  • the first electrically conductive, transparent coating 6.1 can hardly be perceived by the camera 5 and hardly interferes with the view through the laminated pane 10.
  • the lower edge of the composite pane 10 is arranged downwards in the direction of the engine of a passenger car, its upper edge (O) lying opposite the lower edge (U) is directed upwards in the direction of the roof.
  • the camera window 2 is arranged approximately in the middle near the upper edge (O).
  • Figure 2 shows an enlarged view of the camera window 2 from Figure 1.
  • Two busbars 7.1 and 7.2 are provided for electrical contacting of the first, electrically conductive, transparent coating 6.1, which are arranged on two opposite sides of the camera window in such a way that when an electrical voltage is applied a current flows through the first, electrically conductive, transparent coating 6.1 to the bus bars.
  • a first busbar 7.1 is arranged on the left edge area of the camera window 2 on the first, electrically conductive coating 6.1.
  • a second bus bar 7.2 is arranged on the right edge area of the camera window 2 on the first, electrically conductive coating 6.1.
  • the bus bars 7.1 and 7.2 contain silver particles. They were applied to the first, electrically conductive coating 6.1 using the screen printing process and then baked.
  • the length of the busbars 7.1 and 7.2 corresponds approximately to the edge length of the camera window 2. If an electrical voltage is applied to the busbars 7.1 and 7.2, a uniform electrical heating current (indicated by arrows) flows through the first, electrically conductive, transparent coating 6.1.
  • the camera window 2 is heated by the heating current.
  • Each busbar 7.1, 7.2 is electrically conductively connected to a foil conductor 8.1, 8.2, which connects the busbars 7.1, 7.2 to an electrical voltage source 9.
  • a first film conductor 8.1 is electrically conductively connected to the first bus bar 7.1 by means of a soldering compound, an electrically conductive adhesive or by simply lying on it and pressing it inside the laminated pane 10.
  • a second foil conductor 8.2 is electrically conductively connected to the second bus bar 8.2.
  • the foil conductors 8.1 and 8.2 contain, for example, a tinned copper foil with a width of 10 mm and a thickness of 0.3 mm.
  • the foil conductors 8.1 and 8.2 can also merge into connecting cables that are connected to the voltage source 9.
  • the voltage source 9 provides, for example, an on-board voltage that is customary for motor vehicles, preferably from 12 V to 15 V and, for example, about 14 V. Alternatively, the voltage source 9 can also have higher voltages, for example from 35 V to 45 V and in particular 42 V.
  • the busbars 7.1, 7.2 have a constant thickness of, for example, approximately 0.1 mm and a constant specific resistance of, for example, 2.3 pOhmrcm.
  • an electrical voltage is applied to the busbars 7.1, 7.2, an electrical current flows through the first coating 6.1.
  • the bus bars 7.1, 7.2 and their connections can be covered by an opaque color layer 11 (cover print).
  • FIG. 3 shows a cross section through the composite pane 10 according to the invention from FIG. 1 along the section line AA′.
  • the laminated pane 10 comprises an inner pane 1 which is connected to an outer pane 4 via an intermediate layer 3 .
  • the intermediate layer 3 can have a film made of thermoplastic polymer, preferably EVA, PU, PVB or mixtures or copolymers or derivatives thereof.
  • the intermediate layer 3 has an essentially constant thickness of 0.76 mm.
  • the intermediate layer 3 can have two films made of thermoplastic polymer, preferably EVA, PU or mixtures or copolymers or derivatives thereof.
  • the inner pane 1 faces an interior, for example a vehicle interior.
  • the inner pane 1 and the outer pane 4 consist, for example, of soda-lime glass.
  • the outer pane 4 has a thickness of 2.1 mm, for example, and the inner pane 1 has a thickness of 1, 6 mm or 2.1 mm.
  • the first, electrically conductive, transparent coating 6.1 is arranged on the first surface (III) of the inner pane 1 facing the intermediate layer 3.
  • the first coating 6.1 can be electrically contacted via the two busbars 7.1, 7.2.
  • the color layer 11 frames the camera window 2 of the laminated pane 10.
  • a second electrically conductive, transparent coating 6.2 is also arranged outside of the communication window 2 on the first surface (III) of the inner pane 1 facing the intermediate layer 3.
  • the first coating 6.1 is electrically insulated from the second coating 6.2 by a separating line 12 without a coating.
  • the dividing line 12 has a width of 70 ⁇ m, for example.
  • the camera window 2 is formed by the separating line 12, since the separating line 12 completely borders the first electrically conductive coating 6.1. No electrical connection to a voltage source is provided on the second electrically conductive, transparent coating 6.2. For this reason, no busbars are arranged on the second electrically conductive, transparent coating 6.2.
  • the camera window 2 can be any area of the laminated pane 10 or the inner pane 1 that has a high transmission for the corresponding optical and electromagnetic signals.
  • the camera window 2 is intended to provide an optical passage for the field of view of the camera 5 .
  • a coating-free communication window for the transmission of electromagnetic radiation for other sensors attached to the laminated pane 10 can be provided inside the camera window 2, wherein the communication window can have an area of 10% to 30% of the area of the camera window (2).
  • the camera window 2 is transparent, in particular optically.
  • the camera 5 aligned with the camera window 2 is located in an encapsulation attached to the inner pane 1 .
  • the first coating 6.1 and the second coating 6.2 are arranged on a surface (III) of the inner pane 1 that faces the intermediate layer 3.
  • the first coating 6.1 and the second coating 6.2 are identical in this embodiment.
  • the first and second electrically conductive coating 6.1, 6.2 are also sun protection coatings with preferably at least one electrically conductive layer based on a metal, in particular based on silver.
  • Such a sun protection coating has, in particular, reflective properties in the near infrared range, for example in the range from 800 nm to 1500 nm.
  • FIG. 4 shows a cross section of the heatable camera window 2.
  • the first surface (III) of the inner pane 1 and a second surface (II) of the outer pane 4 face one another and are connected to one another via the thermoplastic intermediate layer 3.
  • a second surface (IV) of the inner pane 1 and a first surface (I) of the outer pane 4 face away from one another and from the thermoplastic intermediate layer 3 .
  • the first, electrically conductive, transparent coating 6.1 is arranged on the surface (III) of the inner pane 1.
  • the first bus bar 7.1 is arranged on the left edge area of the camera window 2 on the first, electrically conductive coating 6.1.
  • the second bus bar 7.2 is arranged on the right edge area of the camera window 2 on the first, electrically conductive coating 6.1.
  • FIG. 5 shows a flowchart of an exemplary embodiment of the method according to the invention for producing the laminated pane 10 with a heatable camera window 2.
  • the method comprises the following steps: • the first electrically conductive, transparent coating 6.1 is applied (101) to at least part of the first surface (III) of the inner pane 1,
  • the two bus bars 7.1, 7.2 are applied to the first, electrically conductive, transparent coating 6.1 on two opposite sides of the camera window 2, the bus bars 7.1, 7.2 being arranged such that when an electrical voltage is applied to the
  • busbars 7.1, 7.2 a current flows through the first coating 6.1 (102),
  • the first surface (III) of the inner pane 1 is connected to the electrically conductive, transparent coating 6.1 via the thermoplastic intermediate layer 3 with the surface (II) of the outer pane 4 (103).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Surface Heating Bodies (AREA)
  • Laminated Bodies (AREA)

Abstract

La présente invention concerne une vitre composite (10) comprenant une fenêtre de caméra pouvant être chauffée électriquement (2) et, à l'intérieur de la fenêtre de caméra (2), un premier revêtement transparent électroconducteur (6.1) pour chauffer la fenêtre de caméra (2), le premier revêtement transparent électroconducteur (6.1) étant situé sur la première surface (III) de la vitre interne (1) à l'intérieur de la fenêtre de caméra (2) et comportant deux barres omnibus (7.1, 7.2) qui sont destinées à être connectées à une source de tension (9) et sont situées sur deux côtés opposés de la fenêtre de caméra (2) de sorte que, lorsqu'une tension électrique est appliquée aux barres omnibus (7,1, 7.2), un courant circule à travers le premier revêtement transparent électroconducteur (6.1).
EP22713291.7A 2021-02-05 2022-02-02 Vitre composite comprenant une fenêtre de caméra pouvant être chauffée électriquement Pending EP4288283A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP21155352 2021-02-05
PCT/EP2022/052376 WO2022167434A1 (fr) 2021-02-05 2022-02-02 Vitre composite comprenant une fenêtre de caméra pouvant être chauffée électriquement

Publications (1)

Publication Number Publication Date
EP4288283A1 true EP4288283A1 (fr) 2023-12-13

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Application Number Title Priority Date Filing Date
EP22713291.7A Pending EP4288283A1 (fr) 2021-02-05 2022-02-02 Vitre composite comprenant une fenêtre de caméra pouvant être chauffée électriquement

Country Status (4)

Country Link
US (1) US20240064873A1 (fr)
EP (1) EP4288283A1 (fr)
CN (1) CN115210074A (fr)
WO (1) WO2022167434A1 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2757151B1 (fr) 1996-12-12 1999-01-08 Saint Gobain Vitrage Vitrage comprenant un substrat muni d'un empilement de couches minces pour la protection solaire et/ou l'isolation thermique
GB0408392D0 (en) 2004-04-15 2004-05-19 Pilkington Plc Electrically heated window
EP2200097A1 (fr) 2008-12-16 2010-06-23 Saint-Gobain Glass France S.A. Procédé pour la fabrication d'un dispositif photovoltaïque et système de formation d'un objet
EP2334141A1 (fr) * 2009-12-11 2011-06-15 Saint-Gobain Glass France Vitrage revêtu avec une fenêtre de communication chauffé
DE102012018001A1 (de) * 2011-11-29 2013-05-29 Volkswagen Aktiengesellschaft Transparente Scheibe, Scheiben-Sensor-Einheit und Kraftfahrzeug
EP3458423B1 (fr) 2016-05-17 2020-07-01 Saint-Gobain Glass France Vitre transparente
WO2021209433A1 (fr) * 2020-04-15 2021-10-21 Saint-Gobain Glass France Vitre dotée d'une fenêtre de communication pouvant être chauffée électriquement pour capteurs et systèmes de caméra
DE202021102128U1 (de) * 2021-04-21 2021-04-29 Saint-Gobain Sekurit Deutschland Gmbh & Co. Kg Verbundscheibe mit beheizbarem Sensorfenster

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US20240064873A1 (en) 2024-02-22
WO2022167434A1 (fr) 2022-08-11

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