Self-regulating heating device

Abstract

A self regulating heating device includes a first layer made of an electrically insulating material. The first layer is thin and flexible. First and second buses spaced from each other are connected to the first layer. A resistive layer electrically connects the first and second buses. The resistive layer has a higher electrical resistance than the second layer. The resistive layer experiences a positive temperature coefficient (PTC) effect when heated. A solar active layer is connected to the first layer. The solar active layer is electrically connected to the first and second buses. The solar active layer converts light into electrical energy to apply a voltage across the first and second buses.

Dependencies are inferred from the claim text.