A source line driver circuit and a display apparatus including the same are provided. A weighted graph G is established on a computer. These speakers can be added to any existing radio system with minimal effort or cost. Exemplary treatments include applying a base to the photosensitive material. The closure sealing gasket made of a polyurethane elastomer, obtained by the present invention, when used for a closure, causes no yellowing by ultraviolet light, has a strength at least equal to those of sealing gaskets produced from an aromatic isocyanate.