Abstract: A heatable composite pane having a trapezoidal outline, including a heating area having heating wires embedded in the composite and at least two main busbars. The two main busbars connect ends of a first group of parallel heating wires electrically in parallel. The outer triangular surface of the trapezoidal outline includes at least a second group and a third group of parallel heating wires that can be fed electrically via busbars. The second group and the third group of heating wires have different lengths and are combined to be connected in parallel with the first group. The second group and the third group are electrically connected to one another in series such that an effective wire length between the two main busbars is increased to homogenize heating power in the triangular surface with heating power in the heating area.

Abstract: A heatable composite pane having a trapezoidal outline and a heating area embedded in the composite and formed from heating wires laid alongside one another. At least two busbars connect ends of a number of heating wires to one another electrically in parallel and are located opposite along the side edges of the composite pane, which run parallel to one another. At least one busbar also extends along the side edge in the area of an outer triangular surface of the trapezoidal outline, and in which case at least one outer triangular surface of the trapezoidal outline is also occupied by further heating wires which can be fed electrically via busbars and run essentially parallel to one another and to the heating wires of the heating area. At least two groups of heating wires, which are electrically connected in series with one another, are also provided.