A breakaway mechanism for a charging cable of an electric vehicle charging station includes a retention component and a breakaway component. In one example embodiment, the switch includes a photoalignment layer that enhances control of liquid crystal alignment in the cladding near the coupling region of the microresonator and waveguide. A second circuit which can be connected to the first circuit externally gives the first circuit a non-always-used particular function so that the first circuit can perform the particular function. The OTFT employs the interface layer interposed between the gate insulating layer and the organic semiconductor layer so that the gate insulating layer can be protected from the exterior and adhesion of the gate insulating layer with the organic semiconductor layer can be improved, thereby increasing driving stability.