Heatable laminated vehicle window with improved heat distribution
AssigneeSaint-Gobain Glass France
InventorsMarcel Klein, Valentin Schulz
Life of this patent
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Abstract
A heatable laminated vehicle window for separating a vehicle interior from an outer surrounding area is presented. The vehicle window includes an outer pane bonded to an inner pane via a thermoplastic intermediate layer. An electrically heatable coating of the vehicle window is electrically connected to two busbars such that by applying a supply voltage across the two bus bars, a heating current that forms heating field flows between the two busbars. In one aspect, a metal element is arranged on or in the vehicle window such that heat is dissipated out of a region of the heating field that has elevated heat generation by means of thermal conduction of the metal element.
Claims20
A heatable laminated vehicle window for separating a vehicle interior from an outer surrounding area, comprising:
- an outer pane and an inner pane that are bonded to one another via a thermoplastic intermediate layer;
- an electrically heatable coating that is electrically connected to at least two busbars provided for electrical connection to two poles of a voltage source, so that application of a supply voltage to the two poles causes a flow of a heating current to form a heating field between the at least two busbars;
- and
- at least one metal element that is arranged on or in the vehicle window, so that heat is dissipated out of a region of the heating field with elevated heat generation by means of thermal conduction of the at least one metal element.
A method for producing a heatable laminated vehicle window for separating a vehicle interior from an outer surrounding area, the method comprising:
- preparing an outer pane, a thermoplastic intermediate layer, and an inner pane, wherein one of the outer pane, the inner pane, and the intermediate layer is provided with an electrically heatable coating;
- connecting the electrically heatable coating to at least two busbars provided for electrical connection to two poles of a voltage source so that by applying a supply voltage to the two poles, a heating current flows between the at least two busbars thereby forming a heating field between the at least two busbars;
- and
- bonding the outer pane and the inner pane to one another via the intermediate layer by lamination;
- wherein before or after lamination, at least one metal element is arranged on or in the vehicle window thereby dissipating heat out of a region of the heating field with elevated heat generation by means of thermal conduction of the at least one metal element.
Dependencies are inferred from the claim text.