CN115210073A - Composite glass plate with electrically heatable camera window - Google Patents

Composite glass plate with electrically heatable camera window Download PDF

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Publication number
CN115210073A
CN115210073A CN202280000535.1A CN202280000535A CN115210073A CN 115210073 A CN115210073 A CN 115210073A CN 202280000535 A CN202280000535 A CN 202280000535A CN 115210073 A CN115210073 A CN 115210073A
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CN
China
Prior art keywords
glass pane
heating element
camera window
composite glass
composite
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
CN202280000535.1A
Other languages
Chinese (zh)
Inventor
J·多罗萨里奥
S·吉列森
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
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Saint Gobain Glass France SAS
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Filing date
Publication date
Application filed by Saint Gobain Glass France SAS filed Critical Saint Gobain Glass France SAS
Publication of CN115210073A publication Critical patent/CN115210073A/en
Pending legal-status Critical Current

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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/416—Reflective
    • 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
    • B32B2605/00—Vehicles
    • B32B2605/08—Cars
    • 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
    • H05B2203/002—Heaters using a particular layout for the resistive material or resistive elements
    • H05B2203/003—Heaters using a particular layout for the resistive material or resistive elements using serpentine layout
    • 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

Landscapes

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

Abstract

The invention relates to a composite glass pane (10) with an electrically heatable camera window (2), comprising at least an optically transparent camera window (2), outside the camera window (2) a first electrically conductive transparent coating (6), wherein the first electrically conductive transparent coating (6) is arranged on a first surface (III) of the inner glass pane (1), an electrical heating element (7) for heating the camera window (2), wherein the electrical heating element (7) is arranged on the first surface (III) of the inner glass pane (1) within the camera window (2) and is provided for connection to a voltage source (9).

Description

Composite glass plate with electrically heatable camera window
The invention relates to a composite glass plate with an electrically heatable camera window, a manufacturing method and application thereof.
Composite glass sheets made from two or more glass or polymeric glass sheets are used in vehicles as windshields, rear windows, side windows and roof windows. One or more functional coatings having infrared reflective, anti-reflective, or low E properties may be disposed on each side of the glass sheet. Motor vehicles are increasingly 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). Sensor-based optical driver assistance systems (ADAS) are usually based on optical or electromagnetic sensors which detect the surroundings of the vehicle by emitting and/or receiving photons or electromagnetic waves and thus provide corresponding information for the vehicle electronics. The sensor may be placed in the vehicle on the windshield and/or in the windshield. Thus, in road traffic they offer the possibility of identifying hazards and obstacles in a timely manner.
As autopilot is further developed in the automotive industry, reliable camera systems in or on vehicles are essential. The camera system is usually protected from the weather by a corresponding glass plate, which is to be as clean as possible and free of condensed moisture, in order to ensure the function of the camera sensor. Since condensed moisture and ice formation significantly affect the transmission of electromagnetic waves, it should be removed from the glass as quickly as possible. The wiping system ensures that the glass sheet is cleaned of water droplets and protective particles. However, they are unusable in the case of icing, so that the part of the glass sheet involved which serves as the field of view of the sensor must be briefly heated when required. The sensor field is the region of the glass sheet through which the travelling radiation that can be detected by the sensor passes, i.e. the sensor field of the glass sheet is the region located in the detection beam path of the sensor.
EP 1 605 729 A2 discloses an electrically heatable glass pane with a camera window. The camera window is kept free of condensed moisture and ice by a heating device. A heating element is laminated into the glass sheet at the camera window location, with the heating element disposed adjacent the viewing area.
It is an object of the present invention to provide a composite glass pane with an electrically heatable camera window, which provides improved heating performance of the camera window.
According to the invention, the object of the invention is achieved by a composite glass pane with an electrically heatable camera window according to claim 1. Preferred embodiments are learned by the dependent claims.
The composite glass pane with an electrically heatable camera window according to the invention comprises at least one outer glass pane and one inner glass pane which are plane-connected to one another by at least one thermoplastic interlayer. The outer glass sheet includes a first surface (I) facing away from the intermediate layer and a second surface (II) facing toward the intermediate layer. The inner glass sheet comprises a first surface (III) facing the intermediate layer and a second surface (IV) facing away from the intermediate layer. Furthermore, the composite pane comprises at least one optically transparent camera window and has a first electrically conductive transparent coating outside the camera window, wherein the first electrically conductive transparent coating is arranged, in particular substantially over the entire area, outside the camera window on the first surface (III) of the inner pane. The composite glass pane further comprises an electrical heating element for heating the communication window, wherein the electrical heating element is arranged on the first surface (III) of the inner glass pane within the camera window and is provided for connection to a voltage source, such that upon application of a voltage to the heating element, a heating current flows through the heating element.
The composite glass sheet according to the present invention has significantly improved heating performance within the camera window. In other words, according to the invention it is provided that the camera window is formed by a de-coating region on the first surface (III) of the inner glass pane and contains the heating element in the de-coating region. The invention is based on the recognition that a heating element arranged in the camera window can heat the camera window very efficiently, while the heating element hardly disturbs the optical perspective of the camera.
The composite glass pane with an electrically heatable camera window according to the invention serves to separate an interior space from an exterior environment. It comprises an inner glass plate and an outer glass plate. Essentially, all electrically insulating substrates which are thermally and chemically stable and dimensionally stable under the conditions of manufacture and use of the composite glass pane according to the invention are suitable as inner and outer glass panes.
The inner and outer glass panes preferably comprise glass, particularly preferably flat glass, float glass, quartz glass, borosilicate glass, soda-lime glass, or a transparent plastic, preferably a rigid transparent plastic, in particular polyethylene, polypropylene, polycarbonate, polymethyl methacrylate, polystyrene, polyamide, polyester, polyvinyl chloride and/or mixtures thereof. The inner and outer glass sheets are preferably transparent, particularly for use as a vehicle windshield or rear window or other applications requiring high light transmission.
A glass plate having a transmission in the visible spectral range of more than 70% is then understood as transparent in the sense of the present invention. However, for glazing that is not in the driver's traffic-related field of view, for example for skylight glazing, the transmission may also be much lower, for example greater than 5%.
The thickness of the glass plate can vary widely and can therefore be adapted excellently to the requirements of the individual case. Preferably, glass sheets having a standard thickness of 1.0mm to 25mm, preferably 1.4mm to 2.5mm, are used for vehicle glazing. The size of the glass sheet can vary widely and depends on the size of the use according to the invention. The inner glass plate and the optional outer glass plate have areas of 200 cm up to 20 m, for example as common in vehicle manufacturing.
The composite glass sheet may 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 substrate is planar or slightly or strongly curved in one or more spatial directions. In particular a planar substrate is used. The glass plate may be colorless or colored.
The intermediate layer preferably comprises at least one thermoplastic, preferably polyvinyl butyral (PVB), ethylene Vinyl Acetate (EVA) and/or polyethylene terephthalate (PET). However, the thermoplastic intermediate layer may also for example comprise Polyurethane (PU), polypropylene (PP), polyacrylate, polyethylene (PE), polycarbonate (PC), polymethyl methacrylate, polyvinyl chloride, polyacetate resins, casting resins, acrylates, fluorinated ethylene-propylene, polyvinyl fluoride and/or ethylene-tetrafluoroethylene, or copolymers or mixtures thereof. The thermoplastic intermediate layer may be formed from one or more layers of thermoplastic film arranged one on top of the other, wherein the thickness of the thermoplastic film is preferably 0.25mm to 1mm, typically 0.38mm or 0.76mm.
The first surface (III) of the inner glass pane and the second surface (II) of the outer glass pane face each other and are connected to each other by a thermoplastic interlayer. The second surface (IV) of the inner glass sheet and the first surface (I) of the outer glass sheet face away from each other and from the thermoplastic interlayer.
The camera window has an optical transparency, i.e. a transmission of preferably more than 70% in the wavelength range of 400nm to 1300 nm. The camera window preferably occupies less than 10%, particularly preferably less than 5%, of the glass plate surface. The camera window preferably has a square, rectangular, diamond, trapezoidal, hexagonal, octagonal, cross, oval or circular shape. Preferably, the first surface (III) of the inner glass plate is free of a coating within the camera window.
A first conductive coating is applied on the first surface (III) of the inner glass sheet outside the camera window. Furthermore, a further electrically conductive coating can also be applied on the second surface (II) of the outer glass plate.
Conductive transparent coatings according to the invention are known, for example, from EP 0 847 965 B1 or WO 2017/198362 A1. They usually comprise one or more, for example two, three or four, electrically conductive functional layers. The functional layer preferably comprises at least one metal, such as silver, gold, copper, nickel and/or chromium or a metal alloy. The functional layer particularly preferably comprises at least 90% by weight of metal, in particular at least 99.9% by weight of metal. The functional layer may be composed of a metal or a metal alloy. The functional layer particularly preferably comprises silver or a silver-containing alloy. Such functional layers have a particularly advantageous electrical conductivity with a high transmission in the visible spectral range. The thickness of the functional layer is preferably from 5nm to 50nm, particularly preferably from 8nm to 25nm. In the described thickness range of the functional layer, an advantageously high transmission in the visible spectral range and a particularly advantageous electrical conductivity are achieved.
In general, at least one dielectric layer is arranged between two adjacent functional layers of the coating, respectively. Preferably, a further dielectric layer is arranged below the first functional layer and/or above the last functional layer. The dielectric layer comprises at least one monolayer of a dielectric material, for example comprising a nitride such as silicon nitride or an oxide such as aluminum oxide. However, the dielectric layer may also comprise a plurality of monolayers, such as a monolayer of dielectric material, a smoothing layer, a matching layer, a barrier layer, and/or an anti-reflective layer. The thickness of the dielectric layer is, for example, 10nm to 200nm.
The layer structure is usually obtained by a series of deposition processes carried out by vacuum methods such as magnetic field assisted cathode sputtering.
Other suitable conductive coatings preferably comprise Indium Tin Oxide (ITO), fluorine doped tin oxide (SnO) 2 F) or aluminum-doped zinc oxide (ZnO: al).
In principle, the first conductive transparent coating can be any coating with sufficient transparency. In one advantageous embodiment, the first electrically conductive coating is a layer structure of a layer or of a plurality of individual layers having a total thickness of less than or equal to 2 μm, particularly preferably less than or equal to 1 μm.
In a preferred embodiment, the heating element is formed as a printed line conductor. Such conductors are formed in a very thin layer. The line width of the conductor may be less than 100 micrometers, for example 1 μm, 5 μm, 20 μm, or 180 μm, 300 μm, 350 μm. Furthermore, the conductors have the same cross section, but may alternatively have different cross sections. Thereby, the optical perspective of the camera head is only negligibly impaired, while a high heating performance is ensured. Particularly preferably, the heating element has at least one conductor with a constant width. For such a conductor, the longer of its dimensions is referred to as the length and the shorter of its dimensions is referred to as the width.
In an advantageous embodiment, the heating element has a plurality of wire-shaped conductors which are arranged parallel or at a given angle to one another. Such heating elements are formed from a printed and baked printing paste which preferably contains metal-containing particles, metal particles and/or carbon, in particular silver particles.
In a further advantageous embodiment, the heating element is formed as at least one ring, in particular as an angle ring. Furthermore, the corner ring may have rounded corners.
In another embodiment, the heating element is formed as a heating structure in the form of two rings connected to each other.
The loop width of each of one or both loops may be selected according to the area of the camera window. The larger the area of the camera window, the larger the ring width may be. Here, the width of the ring is selected in terms of area such that the spacing of the heating element to the first conductive transparent coating is not less than 1 μm.
The heating element may preferably be arranged centrally within the camera window.
In a further embodiment, the composite glass pane can have a second coating on the second surface (II) of the outer glass pane facing the intermediate layer, wherein the first electrically conductive transparent coating and/or the second electrically conductive transparent coating has infrared-reflecting properties.
In another aspect, the invention includes a composite glass sheet according to the invention as a windshield.
In another aspect, the invention comprises a method for making a composite glass sheet according to the invention, wherein at least
Applying a first electrically conductive transparent coating at least on a portion of the first surface (III) of the inner glass sheet,
removing the first conductive transparent coating in the camera window,
applying an electrical heating element within the camera window, wherein the electrical heating element is arranged such that, when a voltage is applied to the electrical heating element, a heating current for heating the camera window flows through the electrical heating element,
the first surface (III) of the inner glass sheet with the conductive transparent coating is connected to the surface (II) of the outer glass sheet by a thermoplastic interlayer.
The application of the electrically conductive coating of the first electrically conductive transparent coating can be carried out by methods known per se, preferably by magnetic field-assisted cathode sputtering. This is particularly advantageous for a simple, fast, inexpensive and uniform coating of the first glass plate. However, the conductive coating can also be applied, for example, by vapor diffusion, chemical Vapor Deposition (CVD), plasma-assisted vapor deposition (PECVD) or by wet-chemical methods.
Preferably, the first conductive transparent coating can be removed (decoated) by a laser beam.
The application of the heating element is preferably carried out by printing and baking a conductive paste in a screen printing method or in an ink-jet method. Alternatively, the bus bar may be applied as a strip of conductive film, preferably laid, welded or glued on the conductive coating.
In the screen printing method, the cross-direction forming is performed by a masking fabric through which the printing paste with the metal particles is pressed. By suitably shaping the screen, for example, the width of the bus bar can be predetermined and varied particularly simply.
The individual uncoated zones are preferably produced (decoated) in the electrically conductive coating by means of a laser beam. A method for structuring thin metal films is known, for example, from EP 2 200 097 A1.
Furthermore, the invention includes the use of a composite glass pane according to the invention with a heatable camera window in vehicles, ships, airplanes and helicopters, preferably as a windscreen and/or rear window.
Within the scope of the invention, all embodiments mentioned for individual features can also be freely combined with one another, as long as they are not mutually contradictory.
The invention is explained in more detail below with the aid of figures and exemplary embodiments. The figures are schematic representations and are not drawn to scale. The drawings are not intended to limit the invention in any way.
Wherein:
figure 1 shows a top view of one embodiment of a composite glass sheet having an electrically heatable camera window according to the present invention,
figure 2 shows an enlarged view of the camera window in figure 1,
FIG. 3 shows a cross-sectional view through the composite glass pane according to FIG. 1
FIG. 4 shows a cross-sectional view of the camera window of FIG. 2, an
Fig. 5 shows a flow chart of an embodiment of the method according to the invention.
Descriptions with numerical values should generally not be understood as precise values, but also include tolerances of +/-1% to +/-10%.
Fig. 1 shows a top view of a preferred embodiment of a composite glass sheet 10 with a heatable camera window 2 according to the invention. The composite glass sheet 10 is formed as a windshield for a passenger vehicle. For this purpose, the camera window 2 is arranged centrally at the upper edge region of the composite glass pane 10. The camera window 2 serves as a camera 5 (fig. 3) or a perspective (durchschicht) of the camera system. The camera window 2 can be defined as the area where the beam path of the camera 5 or the entire camera system passes through the composite glass pane 10, in particular the inner glass pane 1 (in fig. 3).
In the installed position, the lower edge of the composite pane 10 is arranged downward in the direction of the passenger vehicle engine, and its upper edge (O) opposite the lower edge (U) points upward in the direction of the roof. The camera window 2 is arranged approximately centrally near the upper edge (O).
The composite glass pane 10 has a first conductive transparent coating 6 outside the camera window 2. A first conductive transparent coating 6 is applied over the camera window 2 to protect the vehicle interior from solar radiation. The first electrically conductive transparent coating 6 can therefore also be a sunscreen coating having preferably at least one metal-based, in particular silver-based, electrically conductive layer. Such a sunscreen coating has in particular a reflection behavior in the near infrared range, for example in the range of 800nm to 1500 nm.
The first conductive transparent coating 6 extends, for example, over the entire surface (III) of the frame-shaped uncoated region of the inner glass pane 1, minus the camera window 2 and minus the encircling width of about 8 mm. The uncoated frame-shaped region serves for electrical insulation between the first electrically conductive transparent coating 6 and the vehicle body. The uncoated areas are sealed by gluing with an intermediate layer 3 (fig. 3) to protect the first conductive transparent coating 6 from damage and corrosion.
Fig. 2 shows an enlarged view of the camera window 2 in fig. 1. The camera window 2 has a heating element 7 for electrically heating the camera window 2. The heating element 7 is arranged centrally within the camera window 2 on the first surface (III) of the inner glass plate 1. The heating element 7 has a first connection point, via which the heating element 7 is electrically conductively connected to the first foil conductor 8.1. Furthermore, the heating element 7 has a second connection point, via which the heating element 7 is electrically conductively connected to the second foil conductor 8.2. Foil conductors 8.1 and 8.2 connect the heating element 7 with a voltage source 9. If a voltage is applied to the wiring position of the heating element 7, a heating current flows through the heating element 7. The camera window 2 is heated by the heating current.
At the connection locations of the heating elements 7, the foil conductors 8.1 and 8.2 can each be connected conductively to the heating elements 7 by means of solder, conductive adhesive or by simply laying down and pressing them in the composite glass pane 10. The foil conductors 8.1, 8.2 comprise, for example, tin-plated copper foil having a width of 10mm and a thickness of 0.3 mm. The foil conductors 8.1 and 8.2 can also be transformed into connection cables to the voltage source 9. The voltage source 9 supplies, for example, an onboard voltage that is customary for motor vehicles, preferably 12V to 15V, for example approximately 14V. Alternatively, the voltage source 14V can also have a higher voltage, for example 35V to 45V, in particular 42V.
The heating element 7 comprises a plurality of printed line-shaped conductors, wherein the conductors have a constant width. The heating element 7 is formed of a printed paste containing silver particles which is printed and baked. The printing paste is applied on the first surface (III) of the inner glass plate 1 by screen printing and then baked. The linear conductors are arranged segment by segment parallel or at a given angle to each other.
In the exemplary embodiment, the heating element 7 is formed as two interconnected rings. The ring is angular in shape, wherein the corners are rounded. The width and shape of the ring may be matched to the area of the camera window 2.
Fig. 3 shows a cross section through the composite glass sheet 10 according to the invention in fig. 1. The composite glass pane 10 comprises an inner glass pane 1 which is connected to an outer glass pane 4 by an intermediate layer 3. The intermediate layer 3 may have a thermoplastic polymer film, preferably EVA, PU, PVB or mixtures or copolymers or derivatives thereof. The intermediate layer 3 has a substantially constant thickness of 0.76mm. Alternatively or additionally, the intermediate layer 3 may have two thermoplastic polymer films, preferably EVA, PU or mixtures or copolymers or derivatives thereof. In the mounted state, the inner glass pane 1 faces an interior space, for example a vehicle interior space.
The inner glass plate 1 and the outer glass plate 4 are made of soda lime glass, for example. The thickness of the outer glass pane 4 is, for example, 2.1mm and the thickness of the inner glass pane 1 is 1.6mm or 2.1mm.
The heating element 7 is arranged on a first surface (III) of the inner glass pane 1 facing the intermediate layer 3. The heating element 7 may be in electrical contact with a voltage source 9 via foil conductors 8.1, 8.2. A colour layer 11 surrounds the camera window 2 of the composite glass pane 10.
The camera window 2 may be any area of the composite glass sheet 10 or inner glass sheet 1 that has a high transmission for corresponding optical and electromagnetic signals. Here, a camera window 2 is provided for optical passage of the field of view of the camera 5. In addition, a camera window 2 may be provided for transmitting electromagnetic radiation from other sensors attached to the composite glass sheet 10.
The camera window 2 is formed to be transparent, in particular, formed to be optically transparent. The camera 5, which is aligned with the camera window 2, is located in a packaging measure fixed to the inner glass pane 1.
Fig. 4 shows a cross section of a heatable camera window 2. The first surface (III) of the inner glass pane 1 and the second surface (II) of the outer glass pane 4 face each other and are connected to each other by a thermoplastic interlayer 3. The second surface (IV) of the inner glass pane 1 and the first surface (I) of the outer glass pane 4 face away from each other and from the thermoplastic interlayer 3. The heating element 7 is arranged on the surface (III) of the inner glass plate 1. The linear conductors of the heating element 7 are arranged at the left and right edge regions of the camera window 2.
Fig. 5 shows a flow chart of an exemplary embodiment of a method according to the present invention for producing a composite glass pane 10 with a heatable camera window 2. The method comprises the following steps:
applying a first electrically conductive transparent coating 6 at least on a part of the first surface (III) of the inner glass pane 1 (101),
removing the first conductive transparent coating 6 within the camera window 2 (102),
applying an electrical heating element 7 within the camera window 2, wherein the electrical heating element 7 is arranged such that, when a voltage is applied to the electrical heating element 7, a heating current for heating the camera window 2 flows through the electrical heating element 7 (103),
connecting (104) the first surface (III) of the inner glass pane 1 with the electrically conductive transparent coating 6 and the heating element 7 with the surface (II) of the outer glass pane 4 via the thermoplastic interlayer 3.
The step of removing the first conductive transparent coating layer may further include the step of removing a layer of the frame-shaped region in the first conductive coating layer.
List of reference numerals:
1. inner glass plate
2. Camera window
3. Intermediate layer
4. Outer glass plate
5. Camera head
6. First conductive coating
7. Heating element
8.1 First foil conductor
8.2 Second foil conductor
9. Voltage source
10. Composite glass plate
11. Color layer
Upper edge of (O) composite glass plate
Lower edge of (U) composite glass plate
(I) A first surface of the outer glass plate opposite to the intermediate layer
(II) a second surface of the outer glass pane facing the intermediate layer
(III) a first surface of the inner glass pane facing the intermediate layer
(IV) a second surface of the inner glass sheet facing away from the intermediate layer

Claims (15)

1. Composite glass pane (10) with an electrically heatable camera window (2), comprising at least:
an outer glass pane (4) and an inner glass pane (1) which are plane-connected to one another by means of at least one thermoplastic interlayer (3), wherein the outer glass pane (4) comprises a surface (I) facing away from the interlayer (3) and a second surface (II) facing the interlayer (3), and the inner glass pane (1) comprises a first surface (III) facing the interlayer (3) and a second surface (IV) facing away from the interlayer (3),
at least one optically transparent camera window (2),
a first electrically conductive transparent coating (6) outside the camera window (2), wherein the first electrically conductive transparent coating (6) is arranged on the first surface (III) of the inner glass plate (1),
an electric heating element (7) for heating the camera window (2),
wherein an electric heating element (7) is arranged on the first surface (III) of the inner glass pane (1) within the camera window (2) and is provided for connection to a voltage source (9).
2. Composite glass pane (10) according to claim 1, wherein the heating element (7) is formed as a printed linear conductor.
3. Composite glass pane (10) according to any one of claims 1 or 2, wherein the heating element (7) has at least one conductor with a constant width.
4. Composite glass pane (10) according to any one of claims 1 to 3, wherein the heating element (7) is formed from a printed and baked printing paste, preferably comprising metal particles and/or carbon, in particular silver particles.
5. A composite glass pane (10) according to any one of claims 1 to 4, wherein the heating element (7) has a plurality of linear conductors arranged parallel to each other or at a given angle to each other.
6. Composite glass pane (10) according to one of claims 1 to 5, wherein the heating element (7) is formed as at least one ring, in particular an angle ring.
7. The composite glass sheet (10) of claim 6, wherein the corner ring has rounded corners.
8. Composite glass pane (10) according to any one of claims 1 to 7, wherein the heating element (7) is formed as two interconnected rings.
9. A composite glass pane (10) according to any one of claims 6 or 7, wherein the ring width is selected in dependence on the area of the camera window (2).
10. The composite glass pane (10) according to any of claims 1 to 9, wherein the heating element (7) is arranged centrally within the camera window.
11. The composite glass pane (10) according to any one of claims 1 to 10, wherein a second surface (II) of the outer glass pane facing the intermediate layer has a second coating.
12. The composite glass pane (10) according to any one of claims 1 to 11, wherein the camera window is uncoated.
13. The composite glass pane (10) according to any of claims 1 to 12, wherein the first and/or the second electrically conductive transparent coating (6, 6) has infrared reflective properties.
14. The composite glass sheet (10) according to any one of claims 1 to 13, wherein the composite glass sheet (10) is a windshield.
15. The method for manufacturing a composite glass sheet (10) according to any one of claims 1 to 14, wherein at least
Applying a first electrically conductive transparent coating (6.1) at least on a part of the first surface (III) of the inner glass sheet (1),
removing the first conductive transparent coating (6.1) in the camera window,
applying an electrical heating element (7) within the camera window (2), wherein the electrical heating element (7) is arranged such that, when a voltage is applied to the electrical heating element (7), a heating current flows through the heating element (7) to heat the camera window (2),
connecting the first surface (III) of the inner glass pane (1) with the electrically conductive transparent coating (6.1) to the surface (II) of the outer glass pane (4) by means of the thermoplastic interlayer (3).
CN202280000535.1A 2021-02-05 2022-01-28 Composite glass plate with electrically heatable camera window Pending CN115210073A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP21155353 2021-02-05
EP21155353.2 2021-02-05
PCT/EP2022/052014 WO2022167333A1 (en) 2021-02-05 2022-01-28 Composite pane comprising an electrically heatable camera window

Publications (1)

Publication Number Publication Date
CN115210073A true CN115210073A (en) 2022-10-18

Family

ID=74556678

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202280000535.1A Pending CN115210073A (en) 2021-02-05 2022-01-28 Composite glass plate with electrically heatable camera window

Country Status (3)

Country Link
CN (1) CN115210073A (en)
DE (1) DE202022002754U1 (en)
WO (1) WO2022167333A1 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2757151B1 (en) 1996-12-12 1999-01-08 Saint Gobain Vitrage GLAZING COMPRISING A SUBSTRATE PROVIDED WITH A STACK OF THIN FILMS FOR SUN PROTECTION AND / OR THERMAL INSULATION
GB0408392D0 (en) 2004-04-15 2004-05-19 Pilkington Plc Electrically heated window
EP2200097A1 (en) 2008-12-16 2010-06-23 Saint-Gobain Glass France S.A. Method of manufacturing a photovoltaic device and system for patterning an object
EP2334141A1 (en) * 2009-12-11 2011-06-15 Saint-Gobain Glass France Coated pane with heatable communication window
DE102012018001A1 (en) * 2011-11-29 2013-05-29 Volkswagen Aktiengesellschaft Transparent glass pane i.e. windscreen, for use in sensor-pane-unit of e.g. passenger car, has sensor region-collecting conductors electrically conductively connected with transparent, electrical conductive layer of sensor region
ES2816063T3 (en) 2016-05-17 2021-03-31 Saint Gobain Transparent moon
CN114271026A (en) * 2020-04-15 2022-04-01 法国圣戈班玻璃厂 Glass pane with an electrically heatable communication window for a sensor and a camera system

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