WO2022180065A1

WO2022180065A1 - Glazing having sensor switching area

Info

Publication number: WO2022180065A1
Application number: PCT/EP2022/054466
Authority: WO
Inventors: Jefferson DO ROSARIO; Anna NEFT; Stefanie PENGEL; Stephan GILLESSEN
Original assignee: Saint-Gobain Glass France
Priority date: 2021-02-24
Filing date: 2022-02-23
Publication date: 2022-09-01
Also published as: CN115245045A; DE202022002745U1

Abstract

The invention relates to glazing (100) at least comprising a first pane (1) having a first surface (1.1), a second surface (1.2) and a lateral edge area extending therebetween, and an electrically conductive coating (4) and a linear opaque covering print (5) which are located on the first surface (1.1), wherein the linear opaque covering print (5) is formed of a printing ink (6) which has decomposing properties with regard to the electrically conductive coating (4), and at least one separating line (8) is formed by the linear opaque covering print (5), by means of which separating line an electrical sensor switching area (7) is formed in the electrically conductive coating (4).

Description

Glazing with sensor button

The invention relates to a glazing with a sensor button, a glazing arrangement with a glazing according to the invention, a method for producing the glazing according to the invention and its use.

Glazing in buildings and vehicles is increasingly being provided with large, electrically conductive layers that have to fulfill certain functions, so-called functional layers.

Electrically conductive layers have the disadvantage that they are not transparent to electromagnetic radiation such as GPS signals or telecommunications signals. In order to ensure their transmission, the coatings can be equipped with a coating-free, so-called communication window or data transmission window. DE 20 2020 106 489 U1 discloses a vehicle pane comprising at least one pane with a transparent coating and an opaque cover print. The opaque masking print is arranged in an area to cover a camera and/or sensor area and/or in a peripheral edge area and is made of a printing ink that has decomposing properties compared to the transparent coating, so that the area in which the opaque masking print is arranged , forms a communication window.

For reasons of energy saving and comfort, high demands are placed on glazing in terms of its heat-insulating properties. So it is desirable to avoid a high heat input from solar radiation, which leads to excessive heating up of the interior and in turn results in high energy costs for the necessary air conditioning. This can be remedied by layer systems in which the light transmission and thus the heat input due to sunlight can be controlled by applying an electrical voltage. Electrochromic layer systems are known, for example, from EP 0867752 A1, US 2007/0097481 A1 and US 2008/0169185 A1. Such layer systems are usually switched by external switches located in the vicinity of the glazing.

Another function of a functional layer aims to keep the field of vision of a vehicle window free of ice and fog. Electrical heating layers are known (see, for example, WO 2010/043598 A1) which cause the pane to heat up in a targeted manner by applying an electrical voltage. The electrical contacting of the heating layer is via busbars typically run along the top and bottom edges of the disk. The bus bars collect the current that flows through the electric heating layer and conduct it to external leads that are connected to a voltage source. The voltage applied to the electrical heating layer is usually controlled by external switches that are integrated in vehicles with example in a dashboard. Direct control of the heating layer on the respective glazing is desirable.

It is known to form sensor buttons by means of a line or surface electrode or by an arrangement of two coupled electrodes, for example as capacitive sensor buttons. Examples can be found in US 2007/0194216 A1. If an object approaches the sensor button, the capacitance of the surface electrode to ground or the capacitance of the capacitor formed by the two coupled electrodes changes. The change in capacitance is measured using 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 Pat. No. 6,452,514 B1 and EP 1515211 A1.

Surface electrodes for sensor buttons can be integrated into a glazing solution without additional components. It is also known to form the sensor button itself by means of separating lines in the functional layer to be controlled. For example, WO 2015/162107 discloses an electrical heating layer with an integrated sensor button for its control.

EP 3 264 242 A1 discloses touch-sensitive glazing with a touch-sensitive device and a light-emitting diode and a method for producing this glazing.

The glazing with an integrated switching device disclosed in DE 20 2009 017952 U1 comprises an electrically conductive coating on a pane, at least one electrode formed by insulation areas in the electrically conductive coating and at least one switch area formed by at least one electrode, the sum of the switch areas being a maximum of 1 /10 of the area of the glazing.

WO 2018/015040 A1 discloses a window pane with a plurality of capacitive switching areas, comprising a pane having an inside surface and a coating which is at least partially arranged on the inside surface of the pane, each a capacitive switching area is electrically separated from the coating by at least one coating-free separating line and can be electrically connected to sensor electronics.

If a sensor button is formed in a functional layer, this usually requires cost-intensive decoating of the functional layer using a laser beam to introduce the structuring separating lines. In addition, the sensor button is limited to the design of the functional layer. In particular, the sensor button must be formed on the same side of the pane as the functional layer to be switched.

In general, it would be desirable to be able to provide a sensor button in an electrically conductive coating without costly decoating of the coating using a laser beam to form the structuring separating lines and to have a sensor button in an area of the glazing that is arranged independently of the area in which the functional element to be switched is arranged.

The object of the present invention is to provide improved glazing with a sensor button, with which the disadvantages mentioned can be avoided. The glazing should be easy and inexpensive to manufacture in industrial series production.

According to the proposal of the invention, these and other objects are achieved by a glazing with a sensor button according to the independent patent claim. Advantageous On the events of the invention result from the dependent claims.

The invention relates to glazing at least comprising a first pane, an electrically conductive coating and a linear, opaque cover print. The first disk has a first surface, a second surface, and a side edge surface extending therebetween.

According to the invention, the electrically conductive coating and the line-shaped opaque masking print are arranged on the first surface of the first pane and the line-shaped opaque masking print is formed from a printing ink which has degrading properties with respect to the electrically conductive coating. In addition, according to the invention, at least one separating line is formed by the linear, opaque covering print, through which an electrical sensor button is formed in the electrically conductive coating. In this case, the electrically conductive coating is electrically subdivided into a sensor button area and a surrounding area.

In one embodiment of the invention, the electrically conductive coating is a sun protection coating with preferably at least one electrically conductive layer based on a metal, in particular based on silver. Such a sun protection coating has special reflective properties in the near infrared range, for example in the range from 800 nm to 1500 nm.

A sun protection coating has the task of filtering out portions of solar radiation, particularly in the infrared range. A sun protection coating preferably comprises at least one thin transparent metallic layer which is embedded between at least one dielectric layer. Silver has established itself as the preferred metal for the metallic layer, since it has a relatively neutral color effect and also selectively reflects infrared radiation outside the visible range of solar radiation. The purpose of the dielectric layers is to use their refractive indices to improve the optical properties of the coated pane and to protect the metallic functional layer from oxidation. Such sun protection layers, which can be produced, for example, using the reactive sputtering process, are used on a large scale in glazing for buildings, but also in motor vehicles. In most cases, layer systems with two silver functional layers, but also three or four silver functional layers, are used because their efficiency, i.e. the reflection of the infrared radiation outside the visible range in relation to the transmission of the visible radiation, is greater.

Suitable sun protection coatings are known, for example, from WO2013/104439A1 and DE 19927683C1.

In a further embodiment of the invention, the electrically conductive coating is an emissivity-reducing coating. The emissivity-reducing coating can also be referred to as a thermal radiation-reflecting coating, low-emissivity coating or LowE coating (low emissivity). Such coatings are known, for example, from WO2013/131667A1. Emissivity is the measure that indicates how much heat radiation the pane emits in the installed position compared to an ideal heat radiator (a black body) into an interior space. The emissivity-reducing coating has the function of preventing the radiation of heat into the interior (IR components of solar radiation and in particular the thermal radiation of the pane itself) and also the radiation of heat from the interior. It has reflective properties against infrared radiation, especially against thermal radiation in the spectral range of 5 pm - 50 pm (cf. also standard DIN EN 12898:2019-06). This effectively improves the thermal comfort in the interior. At high outside temperatures and solar radiation, the emissivity-reducing coating can at least partially reflect the thermal radiation emitted by the entire pane in the direction of the interior, at least partially. At low outside temperatures, the emissivity-reducing coating can effectively reflect the thermal radiation emitted from the interior and thus the effect of the cold Reduce disc as a heat sink. The emissivity-reducing coating preferably contains at least one electrically conductive layer based on a transparent conductive oxide, which provides reflective properties with respect to thermal radiation. The layer based on the transparent conductive oxide is also referred to below as a TCO layer. TCO coatings are corrosion resistant and can be used on exposed surfaces. The TCO layer is preferably based on indium tin oxide (ITO, indium tin oxide), but can alternatively be based on indium zinc mixed oxide (IZO), aluminum-doped zinc oxide (AZO), gallium-doped zinc oxide (GZO), fluorine-doped tin oxide (FTO, SnC>2:F) or antimony-doped tin oxide (ATO, SnC>2:Sb).

In addition to the at least one electrically conductive layer, the sun protection coating or the emissivity-reducing coating usually has dielectric layers which, for example, as anti-reflective layers are intended to increase light transmission, as adaptation layers are intended to improve the crystallinity of the electrically conductive layer, and as smoothing layers the surface structure for the overlying layers are intended to improve or as blocker or barrier layers are intended to prevent diffusion processes during temperature treatments. Common materials for the dielectric layers include silicon nitride, titanium oxide, aluminum nitride, tin oxide, zinc oxide, tin-zinc mixed oxide, and silicon oxide.

The electrically conductive coating is preferably a transparent electrically conductive coating. For the purposes of the invention, a coating is considered to be transparent if it has an average transmission in the visible spectral range of at least 70%, preferably at least 75%, and as a result does not significantly restrict the view through the glazing.

The electrically conductive coating preferably has a thickness of 80 nm to 1000 nm, particularly preferably 140 nm to 400 nm or 700 nm to 900 nm.

The line-shaped, opaque covering print preferably has a thickness of 4 μm (micrometers) to 40 μm, particularly preferably from 5 μm to 25 μm.

In an advantageous embodiment, at least one further separating line is formed by the linear opaque covering print, which at least partially and in particular completely borders the electrical sensor button. By this measure, the surrounding area can be specifically designed. In particular, an electrical short circuit with the remaining electrically conductive coating can be prevented.

The linear opaque masking print preferably contains at least one pigment and glass frits. It may contain other chemical compounds. The glass frits can be partially melted or melted and the masking print can be permanently bonded (fused or sintered) to the glass surface. The pigment provides the opacity of the masking print. Such masking prints are typically applied as an enamel.

The ink from which the line-shaped opaque masking print is formed contains at least the pigment and the glass frits suspended in a liquid phase (solvent), for example water or organic solvents such as alcohols. The pigment is typically a black pigment such as carbon black, aniline black, bone black, iron oxide black, spinel black and/or graphite.

The decomposing properties of the printing ink in relation to the electrically conductive coating can be achieved through a suitable choice of glass frits. These are preferably formed on the basis of bismuth zinc borate. In order to achieve the decomposing properties, the bismuth content and/or the boron content is preferably higher than in conventional glass frits.

In a preferred embodiment, the printing ink contains at least one pigment and glass frits based on bismuth zinc borate. In a further embodiment, the decomposing covering pressure known from WO 2014/133929 A2 can also be used.

Each dividing line preferably has a width of 30 μm to 200 μm and in particular of 70 μm to 140 μm, so that the dividing lines are practically imperceptible optically.

Preferably, the electrical sensor button is a capacitive sensor button.

In a preferred embodiment, the glazing additionally comprises a second pane, which is connected to the first pane via a thermoplastic intermediate layer. The second disk has a first surface and a second surface and a side edge surface therebetween. In this embodiment, the glazing is designed as a composite pane. The surfaces of the first pane and the second pane of the laminated pane are commonly referred to as Side I, Side II, Side III, and Side IV, from the outside in.

In one embodiment, the first surface of the first pane and the first surface of the second pane are connected to one another via the thermoplastic intermediate layer. In this embodiment, the electrically conductive coating and the linear opaque cover print are arranged between the first pane and the thermoplastic intermediate layer and thus inside the laminated pane and are protected in this way from external influences. The first pane can, for example, represent the outer pane and the second pane the inner pane of the glazing designed as a composite pane. Alternatively, the first pane can also form the inner pane and the second pane the outer pane of the glazing designed as a composite pane. The embodiment in which the first pane forms the inner pane is preferred, since in this embodiment the sensor button area can be easily switched from the inside of the composite pane.

In one embodiment, the second surface of the first pane and the first surface of the second pane are connected to one another via the thermoplastic intermediate layer. In this embodiment, the electrically conductive coating and the linear opaque cover print are thus arranged on the outside of the laminated pane. The first pane can, for example, represent the outer pane and the second pane the inner pane of the glazing designed as a composite pane. In this embodiment, however, preference is given to the first pane is the inner pane and the second pane is the outer pane of the glazing designed as a composite pane.

If the laminated pane is intended to separate an interior from the outside environment in a window opening of a vehicle or a building, the inner pane within the meaning of the invention refers to the pane facing the interior (vehicle interior). The outer pane refers to the pane facing the outside environment.

The thermoplastic intermediate layer contains or consists of at least one thermoplastic, preferably polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), thermoplastic polyurethane (PU) or mixtures or copolymers or derivatives thereof, particularly preferably polyvinyl butyral (PVB), very particularly preferably polyvinyl butyral (PVB ) and additives known to those skilled in the art, such as plasticizers.

Plasticizers are chemical compounds that make plastics softer, more flexible, more supple and/or more elastic. They shift the thermoelastic range of plastics to lower temperatures so that the plastics have the desired more elastic properties in the operating temperature range. Preferred plasticizers are carboxylic acid esters, especially low-volatility carboxylic acid esters, fats, oils, soft resins and camphor. Other plasticizers are preferably aliphatic diesters of tri- or tetraethylene glycol. Particular preference is given to using 3G7, 3G8 or 4G7 as the plasticizer, the first digit designating the number of ethylene glycol units and the last digit designating the number of carbon atoms in the carboxylic acid part of the compound. Thus 3G8 stands for triethylene glycol bis-(2-ethylhexanoate), ie for a compound of the formula C4H ₉ CH(CH 2 CH ₃ )CO(0CH ₂ CH ₂ ) ₃ 0 ₂ CCH(CH ₂ CH ₃ )C4H ₉ .

The thermoplastic intermediate layer preferably contains at least 3% by weight, preferably at least 5% by weight, particularly preferably at least 20% by weight, even more preferably at least 30% by weight and in particular at least 40% by weight of a plasticizer . The plasticizer preferably contains or consists of triethylene glycol bis(2-ethylhexanoate).

The thermoplastic intermediate layer more preferably contains at least 60% by weight, particularly preferably at least 70% by weight, in particular at least 90% by weight and for example at least 97% by weight, of polyvinyl butyral. 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 being preferably from 0.25 mm to 1 mm, typically 0.38 mm or 0.76 mm.

The first pane preferably contains or consists of glass, particularly preferably flat glass, float glass, quartz glass, borosilicate glass, soda-lime glass.

The thickness of the first pane can vary widely and be adjusted to the requirements of the individual case. Discs with standard thicknesses of 1.0 mm to 25 mm and preferably 1.4 mm to 2.1 mm are preferably used. The size of the discs can vary widely and depends on the use.

The glazing can have any three-dimensional shape. The first pane preferably has no shadow zones, so that it can be coated, for example by cathode sputtering. Preferably, the first pane is planar or slightly or greatly curved in one or more directions of space. The first disc can be colorless or colored.

In the embodiments in which the glazing has a second pane in addition to the first pane, the thickness of the second pane can also vary widely and be adapted to the requirements of the individual case. Discs with standard thicknesses of 1.0 mm to 25 mm and preferably 1.4 mm to 2.1 mm are preferably used. The size of the discs can vary widely and depends on the use. Preferably, the second pane is planar or slightly or heavily curved in one or more directions of space. The second disc can be colorless or colored.

For the purposes of the present invention, "transparent" means that the total transmission of the glazing corresponds to the legal requirements for windshields and front side windows and preferably has a transmittance of more than 70% and in particular more than 75% for visible light. For rear side windows, roof windows and rear windows, "transparent" can also mean 10% to 70% light transmission. Correspondingly, "opaque" means a light transmission of less than 15%, preferably less than 5%, in particular 0%. The glazing designed as a composite pane can comprise a functional element with electrically controllable properties, which is arranged between the first pane and the thermoplastic intermediate layer or between the second pane and the thermoplastic intermediate layer. If the thermoplastic intermediate layer connecting the first pane and the second pane is a multilayer intermediate layer, the functional element with electrically controllable properties can also be arranged between two layers of the multilayer thermoplastic intermediate layer.

Functional elements with electrically controllable properties are, for example, SPD (suspended particle devices), PDLC (polymer-dispersed liquid crystal), electrochromic or electroluminescent functional elements and are known per se to the person skilled in the art. Alternatively, the functional element with electrically controllable properties can also be a layer with a heating function. Suitable heatable layers are known to those skilled in the art.

In a particularly preferred embodiment, the glazing according to the invention is designed as a laminated pane with a functional element arranged therein with electrically controllable properties and the functional element arranged in the laminated pane with electrically controllable properties is switched via the electrical sensor button formed in the electrically conductive coating.

However, it is also possible for a functional element arranged outside the glazing with electrically controllable properties or, for example, lighting arranged outside of the glazing, in the glazing or on the glazing, to be switched by the electrical sensor button formed in the electrically conductive coating.

The electric sensor button is preferably net arranged in an edge area of the glazing. The electrical sensor button is particularly preferably arranged in a corner region of the glazing.

The glazing according to the invention can include a peripheral masking print, this peripheral masking print optionally being formed from an ink having degrading properties with respect to the electrically conductive coating. The peripheral masking print can be arranged on the first surface of the first pane like the line-shaped opaque masking print. But it is also possible that the peripheral cover print on the second surface of the first pane or, in the case of a composite pane, on the first surface or the second surface of the second pane.

It will be appreciated that when the peripheral masking print is formed from an ink having degrading properties to the electrically conductive coating, it is preferably located on the same disc surface as the electrically conductive coating.

The advantage of the glazing according to the invention with an electrical sensor button is that the at least one dividing line formed by the linear opaque masking print can be flexibly adapted to the respective installation situation, so that the location and shape of an electrical sensor button in the area can be easily varied.

In a configuration suitable for simple switching functions, the electrical sensor button has two parallel or concentric conductors which form a contact switch which is spaced apart in the range between 0.3 and 1.5 cm, in particular between 0.5 and 1 cm -have section. For the reliable implementation of a switching function, the conductor spacing must be measured using a finger or the thumb of an adult and may also lie outside the range specified here.

For more complex control functions, the electrical sensor button preferably has a plurality of conductors spaced apart from one another. With such a configuration, a specific setting can be selected from several available settings by “swiping” over the switching element, as is familiar from smartphones and similar devices, or by specifically touching a part of the same area.

The invention further extends to a glazing assembly comprising a glazing according to the invention and sensor electronics electrically connected to the sensor button. The sensor electronics are, in particular, capacitive sensor electronics.

The sensor electronics preferably measure the capacitance of the electrically conductive coating to ground or the capacitance of two or more areas of the electrically conductive coating to one another. If a change in capacitance is detected, the sensor electronics emit a control signal, for example to control the coloring of an electrochromic layer system by outputting a suitable control voltage to the electrochromic layer system. the Voltage values are selected, for example, such that at one voltage value the electrochromic layer system assumes its colorless state with maximum transparency for visible light and at a different voltage value the electrochromic layer system assumes its maximum coloring and minimum transparency.

Sensor electronics for a capacitive sensor button are known, for example, from DE 20 2005 010 379 U1. In a simple embodiment, the capacitance of the sensor button is measured by a capacitance/voltage converter. The sensor button is charged to a predetermined voltage by the sensor electronics. The current flow required for charging is measured and converted into a voltage signal. The sensor button is then discharged and recharged to the specified voltage. A change in the capacitance of the sensor button can be measured by the change in the voltage signal. The capacitance of the sensor pad to ground changes when a grounded body, such as a human, comes near or touches it. Alternatively, the sensor button can contain two areas and the capacitance between the two areas can be measured.

A change in capacitance can also be detected by a non-oscillating oscillator, which is caused to oscillate by the change in capacitance. Alternatively, a vibrating oscillator can be damped so much that its oscillation stops. A sensor electronics with oscillator is known from EP 0 899 882 A1.

The invention also relates to a method for producing glazing according to the invention, wherein in a first step at least a first pane having a first surface, a second surface and a side edge surface running in between is provided, and in a second step an electrically conductive coating is provided on the first surface the first pane is deposited, in a third step, a printing ink with decomposing properties compared to the electrically conductive coating is printed in a line on the electrically conductive coating and in a fourth step, the printing ink printed on in a line is baked to form a line-shaped opaque masking print, with the printing ink decomposes the area of the electrically conductive coating located below it and forms at least one parting line, through which an electrical sensor button area is formed in the electrically conductive coating. The electrically conductive coating is preferably deposited in the second step in a vacuum-based coating process. Suitable vacuum-based coating methods are, for example, CVD (chemical vapor deposition) or PVD (physical vapor deposition) and are known to those skilled in the art. The electrically conductive coating is usually deposited over the entire surface of the first surface of the first pane.

The printing of the printing ink with decomposing properties in relation to the electrically conductive coating in the third step of the process is preferably carried out using the screen printing process. In this case, the printing ink is printed through a fine-meshed fabric onto the first surface of the first pane. The printing ink is pressed through the fabric with a rubber squeegee, for example. The fabric has areas that are ink permeable alongside areas that are ink impermeable, thereby defining the geometric shape of the print. The fabric thus acts as a template for the print.

After the printing ink has been printed, the fourth step is to burn it into a line-shaped opaque masking print. Firing preferably takes place at a temperature of from 500.degree. C. to 700.degree. C., in particular from 550.degree. C. to 650.degree.

Compared to methods according to the prior art, the method according to the invention offers the advantage in particular that no cost-intensive decoating of the electrically conductive coating by means of a laser is necessary to form separating lines, but the separating lines by applying a printing ink with decomposing properties compared to the electrically conductive coating and subsequent baking of the printing ink. Standard glass processes can thus be used.

If the glazing is to be curved, the first pane is subjected to a bending process. It goes without saying that in the case of glazing designed as a curved laminated pane, both the first pane and the second pane are subjected to a bending process before lamination. The first pane and the second pane are preferably bent congruently together (ie at the same time and using the same tool), because the shape of the panes is thereby optimally matched to one another for the lamination that takes place later. Typical temperatures for glass bending processes are 500°C to 700°C, for example. To produce curved glazing according to the invention, firing can also be carried out during the bending process of the pane in the bending furnace. Alternatively, however, in the production of bent glazing according to the invention, firing can also take place in an upstream process before the bending step. An upstream baking step is particularly advantageous in the case of congruent bending of the first and second pane when the first surface of the first pane and thus also the masking print in the finished composite pane are arranged on the inside and thus the not yet baked-on pane without a preceding baking step Ink on the first surface of the first disc would contact the first surface of the second disc during congruent bending.

In the embodiments in which the glazing is designed as a composite pane, the method additionally comprises the step of providing a second pane and a thermoplastic intermediate layer, the step of forming a stack sequence from the first pane with an electrically conductive coating applied thereto and a linear opaque cover print , thermoplastic intermediate layer and second pane and the step of laminating the stack sequence formed.

The stacking sequence can be laminated using common lamination processes. For example, so-called autoclave processes can be carried out at an increased pressure of about 10 bar to 15 bar and temperatures of 130° C. to 145° C. for about 2 hours. Alternatively, autoclave-free methods are also possible. Known vacuum bag or vacuum ring processes work, for example, at about 200 mbar and 80 °C to 110 °C. The stack sequence can also be pressed in a calender between at least one pair of rollers to form a composite pane. Plants of this type are known for the production of discs and normally have at least one heating tunnel in front of a pressing plant. The temperature during the pressing process is, for example, from 40°C to 150°C. Combinations of calender and autoclave processes have proven particularly useful in practice. Alternatively, vacuum laminators can be used. These consist of one or more heatable and evacuable chambers in which the outer and inner panes are laminated within, for example, around 60 minutes at reduced pressures of 0.01 mbar to 800 mbar and temperatures of 80 °C to 170 °C.

The configurations described above in connection with the glazing according to the invention also apply in the same way to the method according to the invention and vice versa. The invention also extends to the use of the glazing according to the invention on buildings or in means of transportation for traffic on land, in the air or on water, for example as a roof pane, side pane and/or windshield. According to the invention, the use of the glazing in motor vehicles is preferred.

The invention is explained in more detail with reference to drawings and exemplary embodiments. The drawings are schematic representations and not to scale. The drawings do not limit the invention in any way. Show it:

1 shows a plan view of an embodiment of a glazing 100 according to the invention;

Figure 2 shows a cross-section through area B of Figure 1 along section line X-X';

FIG. 3 shows cross sections of the embodiment of the glazing 100 according to the invention shown in cross section in FIG. 2 during different phases of its manufacture;

4 shows a plan view of a further embodiment of a glazing 100 according to the invention; Figure 5 is a cross-section through area B of Figure 4 along section line X-X';

FIG. 6 is an enlarged plan view of an embodiment of a portion that includes portion B of FIG. 4 .

7 shows a section of a cross section through a further embodiment of the glazing 100 according to the invention;

8 shows a section of a cross section through a further embodiment of the glazing 100 according to the invention;

9 shows a section of a cross section through a further embodiment of the glazing 100 according to the invention; and

10 shows an exemplary embodiment of a method according to the invention using a flow chart.

FIG. 1 shows a plan view of an embodiment of a glazing 100 according to the invention and FIG. 2 shows a cross section through the region B of FIG. 1 along the section line X-X'.

As can be seen from FIGS. 1 and 2, the glazing 100 according to the invention in the embodiment shown in FIGS. 1 and 2 has a first pane 1 with a first surface 1.1 and a second surface 1.2 and a peripheral side edge surface. The first pane 1 consists, for example, of soda-lime glass and has a thickness of 2.1 mm. An electrically conductive coating 4 and a linear, opaque cover print 5 are arranged on the first surface 1.1 of the first pane. The electrically conductive coating is, for example, an emissivity-reducing coating, includes a conductive ITO layer in addition to dielectric layers and has a thickness of 400 nm. Alternatively, the electrically conductive coating 4 can, for example, also be a sun protection coating with a plurality of conductive silver layers in addition to dielectric layers. The linear opaque cover print 5 is formed from a printing ink 6 which has decomposing properties in relation to the electrically conductive coating 4 and the linear opaque cover print 5 forms a separating line 8 . An electrical sensor button 7 is formed in the electrically conductive coating 4 by the dividing line 8 . The dividing line 8 has a width of 70 μm, for example. The linear, opaque cover print 5 has a thickness of 25 μm, for example. The printing ink 6 contains at least one pigment and glass frits based on bismuth borate.

FIG. 3 shows cross sections of the embodiment of the glazing 100 according to the invention shown in cross section in FIG. 2 during various phases of its manufacture.

First, a first pane 1 is provided, which has a first surface 1.1 and a second surface 1.2 and a peripheral side edge surface (Fig. 3 (a)). An electrically conductive coating 4 is then deposited over the entire surface of the first surface 1.1 of the first pane 1 by means of cathode deposition supported by a magnetic field (FIG. 3 (b)). At closing a printing ink 6, which has decomposing properties compared to the electrically conductive coating 4, linearly printed on the electrically conductive coating (Fig. 3 (c)). Then the linearly printed printing ink 6 is baked to form a linear, opaque cover print 5, with the printing ink 6 decomposing the area of the electrically conductive coating 4 underneath it and forming at least one separating line 8, through which an electrical sensor button is formed in the electrically conductive coating 4 (Figure 3(d)).

FIG. 4 shows a plan view of a further embodiment of a glazing solution 100 according to the invention, and FIG. 5 shows a cross section through region B of FIG. 4 along section line XX'. The glazing 100 according to the invention shown in FIGS. 4 and 5 differs from that shown in FIGS. 1 and 2 only in that a further dividing line 8' is formed by the linear opaque cover print 5 in addition to a first dividing line 8, which the electrical Sensor button 7 at least partially bordered. The further dividing line 8' also has a width of 70 μm, for example.

FIG. 6 shows an enlarged plan view of an embodiment of a portion that includes portion B of FIG. 4 .

As illustrated in FIG. 6, the electrically conductive coating 4 is structured by two dividing lines 8, 8'. The electrically conductive coating 4 is electrically divided into the electrical sensor button area 7 and a surrounding area 9 by a first dividing line 8 . The surrounding area 9 is electrically subdivided from the remaining area of the remaining electrically conductive coating 4 by a second separating line 8 ′. The two separating lines 8, 8' have a width of 70 μm, for example, and are formed by a line-shaped, opaque covering print 5 made of a printing ink which has decomposing properties in relation to the electrically conductive coating.

The electrical sensor button 7 includes a touch area 10 which is circular in this example and merges into a lead area 11 . The width of the contact area 10 is 40 mm, for example. The width of the lead region 11 is 1 mm, for example. The supply line area 11 is electrically conductively connected to capacitive sensor electronics 12 via a film conductor (not shown). The foil conductor consists, for example, of a 50 μm thick copper foil and is insulated, for example, outside of the feed area 11 with a polyimide layer.

The electrical sensor button 7 is a capacitive sensor button here. A capacitive sensor electronics 12 measures changes in the capacitance of the sensor button 7 relative to "earth" and, depending on a threshold value, forwards a switching signal, for example to the CAN bus of a vehicle. Any functions in the vehicle can be switched via the switching signal.

When a human body part, such as a finger, approaches or touches the sensor button 7, a switching process can be triggered. The reference signal for the change in capacitance is tapped from the surrounding area 9, for example. Fig. 7 shows a detail of a cross section through a further embodiment of the fiction, contemporary glazing 100. The embodiment shown in FIG. 7 differs from the embodiment shown in FIG Surface 2.1 and a second surface 2.2 and a circumferential side edge surface and the first pane 1 is connected to the second pane 2 via a thermoplastic intermediate layer 3. In the embodiment shown in FIG. 7, the first pane 1 and the second pane 2 are arranged in such a way that the second surface 1.2 of the first pane 1 and the first surface 2.1 of the second pane 2 face the thermoplastic intermediate layer 3.

The second pane 2 consists, for example, of soda-lime glass and has a thickness of 2.1 mm. The thermoplastic intermediate layer 3 is formed, for example, from a 0.76 mm thick PVB film.

The first pane 1 represents, for example, the inner pane and the second pane 2 represents the outer pane of the glazing designed as a composite pane. Alternatively, the first pane 1 can also represent the outer pane and the second pane 2 the inner pane.

Fig. 8 shows a detail of a cross section through a further embodiment of the fiction, contemporary glazing 100. The embodiment shown in Fig. 8 differs from the embodiment shown in Fig. 7 only in that the first surface 1.1 of the first pane 1 and the first surface 2.1 of the second pane 2 to the thermoplastic intermediate layer 3 have. The electrically conductive coating 4 and the linear opaque cover print is thus arranged on the inside and in this way protects against external influences. In the configuration shown in FIG. 8, the first pane 1 represents the outer pane and the second pane 2 represents the inner pane of the glazing designed as a composite pane.

Fig. 9 shows a detail of a cross section through a further embodiment of the fiction, contemporary glazing 100. The embodiment shown in FIG. 9 differs from the embodiment shown in FIG Pane 2 represents the outer pane of the glazing designed as a composite pane. 10 shows an exemplary embodiment of the method according to the invention for producing a glazing 100 according to the invention using a flow chart, comprising the steps:

P1 Provision of a first disc 1 having a first surface 1.1, a second surface 1.2 and a side edge surface extending therebetween.

P2 depositing an electrically conductive coating 4 on the first surface 1.1 of the first pane 1.

P3 Line-shaped printing of a printing ink 6, which has decomposing properties compared to the electrically conductive coating 4, on the electrically conductive coating.

P4 Baking of the linearly printed printing ink 6 to form a linear, opaque cover print 5, with the printing ink 6 decomposing the area of the electrically conductive coating 4 underneath it and forming at least one separating line 8 through which an electrical sensor button 7 in the electrically conductive coating 4 is formed - is formed.

Reference List

1 first disc

2 second disc

3 thermoplastic interlayer

4 electrically conductive coating

5 linear opaque masking print

6 ink

7 electric sensor button

8, 8' dividing line

9 surrounding area

10 touch area

11 lead area

12 sensor electronics

100 glazing

1.1 first surface of the first disc 1

1.2 second surface of first pane 1 2.1 first surface of second pane 2

2.2 second surface of the second disc 2

X-X' cutting line

Claims

patent claims

1. Glazing (100), at least comprising a first pane (1) with a first surface (1.1), a second surface (1.2) and a side edge surface running in between, an electrically conductive coating (4) and a line-shaped opaque cover print (5) , which are arranged on the first surface (1.1), wherein the line-shaped opaque cover print (5) is formed from a printing ink (6) which has decomposing properties in relation to the electrically conductive coating (4) and through the line-shaped opaque cover print (5) at least one dividing line (8) is formed, through which an electrical sensor button (7) is formed in the electrically conductive coating (4).

2. Glazing (100) according to claim 1, wherein the electrically conductive coating (4) is a sun protection coating with at least one electrically conductive layer based on a metal, in particular based on silver.

3. Glazing (100) according to claim 1, wherein the electrically conductive coating (4) is an emissivity-reducing coating with at least one electrically conductive layer based on a transparent, conductive oxide.

4. Glazing (100) according to one of claims 1 to 3, wherein the linear opaque cover print (5) forms at least one further separating line (8') which at least partially and in particular completely surrounds the electric sensor button (7).

5. Glazing (100) according to one of Claims 1 to 4, in which the printing ink (6) contains at least one pigment and glass frits formed on the basis of bismuth-zinc-borate.

6. Glazing (100) according to one of Claims 1 to 5, each parting line (8, 8') having a width of between 30 μm and 200 μm and in particular between 70 μm and 140 μm.

7. Glazing (100) according to any one of claims 1 to 6, wherein the electrical sensor switch surface (7) is a capacitive sensor switch surface.

8. Glazing (100) according to any one of claims 1 to 7, additionally comprising a second pane (2) having a first surface (2.1) and a second surface (2.2) and a side edge surface extending therebetween which is bonded via an intermediate thermoplastic layer (3 ) is connected to the first pane (1) to form a composite pane.

9. Glazing (100) according to claim 8, additionally comprising a functional element with electrically controllable properties, which is located between the first pane (1) and the thermoplastic intermediate layer (3) or between the second pane (2) and the thermoplastic intermediate layer (3 ) Or between two layers of a multi-layer thermoplastic intermediate layer (3) is arranged.

10. Glazing (100) according to any one of claims 1 to 9, wherein the electrical sensor switching surface (7) is arranged in an edge region of the glazing (100), preferably in a corner region of the glazing (100).

11. Glazing (100) according to any one of claims 1 to 10, additionally comprising a peripheral masking print, wherein the peripheral masking print is optionally formed from a printing ink (6) with degrading properties in relation to the electrically conductive coating (4).

12. A glazing assembly comprising:

- a glazing (100) according to any one of claims 1 to 11,

- Sensor electronics (12), in particular capacitive sensor electronics, which is electrically connected to the electrical sensor button (7).

13. A method for producing a glazing (100) according to any one of claims 1 to 11, wherein at least a) a first pane (1) having a first surface (1.1), a second surface (1.2) and a side edge surface extending therebetween is provided , b) an electrically conductive coating (4) is deposited on the first surface (1.1) of the first pane (1), c) a printing ink (6) which has decomposing properties in relation to the electrically conductive coating (4), linearly the electrically conductive coating is printed on, d) the linearly printed printing ink (6) is baked to form a linear, opaque cover print (5), the printing ink (6) decomposing the area of the electrically conductive coating (4) underneath it and forming at least one separating line (8) through which an electrical sensor button (7) is formed in the electrically conductive coating (4).

14. The method according to claim 13, wherein the printing ink (6) to form the linear opaque covering print (5) is baked at a temperature of 500°C to 700°C, in particular from 550°C to 650°C.

15. Use of the glazing (100) according to any one of claims 1 to 11 in buildings or in means of transport for traffic on land, in the air or on water, in particular special in motor vehicles, for example as a roof pane, side pane and/or windshield.