Heatable composite pane having a security function
First Claim
Patent Images
1. A composite pane, comprising:
- a first pane, at least one intermediate layer, and second pane,a transparent, electrically conductive first coating between the at least one intermediate layer and the first pane and/or between the at least one intermediate layer and the second pane, anda first busbar and a second busbar, which are connected to the transparent, electrically conductive first coating, the first busbar being connected to a ground potential and the second busbar being connected to a DC voltage of 75 V to 450 V or an AC voltage of 25 V to 450 V,wherein an area of the transparent, electrically conductive first coating and an area of a transparent, electrically conductive second coating are arranged one over another with at least 80% congruence and insulated from each other,wherein the transparent, electrically conductive second coating is connected via at least one third busbar to the ground potential, andwherein the transparent, electrically conductive second coating has a low emissivity of less than 50% that is provided by a layer system that includes;
i) at least one functional layer based on at least one metal from the group, consisting of niobium, tantalum, and zirconium, andii) a dielectric layer arranged on a vehicle interior side of the at least one functional layer.
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Abstract
A composite pane is described. The composite pane has a first pane, at least one intermediate layer, a second pane, a transparent, electrically conductive first coating between the intermediate layer and the first pane and/or between the intermediate layer and the second pane, a first busbar and a second busbar, and a transparent, electrically conductive second coating.
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Citations
20 Claims
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1. A composite pane, comprising:
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a first pane, at least one intermediate layer, and second pane, a transparent, electrically conductive first coating between the at least one intermediate layer and the first pane and/or between the at least one intermediate layer and the second pane, and a first busbar and a second busbar, which are connected to the transparent, electrically conductive first coating, the first busbar being connected to a ground potential and the second busbar being connected to a DC voltage of 75 V to 450 V or an AC voltage of 25 V to 450 V, wherein an area of the transparent, electrically conductive first coating and an area of a transparent, electrically conductive second coating are arranged one over another with at least 80% congruence and insulated from each other, wherein the transparent, electrically conductive second coating is connected via at least one third busbar to the ground potential, and wherein the transparent, electrically conductive second coating has a low emissivity of less than 50% that is provided by a layer system that includes; i) at least one functional layer based on at least one metal from the group, consisting of niobium, tantalum, and zirconium, and ii) a dielectric layer arranged on a vehicle interior side of the at least one functional layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A composite pane, comprising:
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a first pane, at least one intermediate layer, and second pane, a transparent, electrically conductive first coating between the at least one intermediate layer and the first pane and/or between the at least one intermediate layer and the second pane, and a first busbar and a second busbar, which are connected to the transparent, electrically conductive first coating, the first busbar being connected to a ground potential and the second busbar being connected to a DC voltage of 75 V to 450 V or an AC voltage of 25 V to 450 V, wherein an area of the transparent, electrically conductive first coating and an area of a transparent, electrically conductive second coating are arranged one over another with a protrusion of the area of the second coating beyond the area of the first coating by at least 10% and insulated from each other, wherein the transparent, electrically conductive second coating is connected via at least one third busbar to the ground potential, and wherein the transparent, electrically conductive second coating has low emissivity, and comprises a layer system having; at least one functional layer based on at least one metal from the group, consisting of niobium, tantalum, and zirconium, and a dielectric layer arranged on a vehicle interior side of the at least one functional layer.
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Specification