Patent ID: 8471177

Claim:
A laminated heated glazing comprising: at least two superposed transparent substrate panes with an interlayer made of a transparent plastic interposed between two adjacent panes; at least one thin transparent conductive film that continuously extends over at least part of the glazing and disposed on an inside of or on an outer surface of the glazing, the at least one film being heated for deicing and/or demisting by a Joule effect; a plurality of elongated current leads, each of the current leads being formed of a conductive material and disposed across from each other on a periphery of the glazing and connected to a current source external to the glazing, at least a portion along a length of a first current lead of the plurality of current leads being non-parallel to a least a portion along a length of a second current lead of the plurality of current leads; a heating area disposed between two of the current leads in a single-phase current supply, or three heating areas disposed between the current leads in a three-phase current supply; and flow separation lines etched in the film connecting the current leads to each other to guide current from one current lead to another, wherein a width of the flow separation lines is small enough for the flow separation lines to be invisible to the naked eye in the laminated heated glazing, and wherein the flow separation lines have an arcuate portion between the non-parallel portions of the first and second current leads facing each other, the flow separation lines having the arcuate portion are configured to prevent cold spots in sharp corners of the glazing due to the non-parallel current leads.