Thermoelectric power generator

Disclosure is related to a thermoelectric power generator. The generator essentially includes a thermoelectric thin-film element (201) which is such as a thin film used to generate voltages according to a temperature difference. The output electric signals are converted to energy stored in an energy storage element (203). An output circuit (205) is included to output power. In an exemplary embodiment, the thermoelectric power generator has a contact interface (30) for sensing external temperate. The thermoelectric thin-film element (201) is enabled to output voltages when temperature difference is induced. The generator further has a switch (503), which is used to control if the power is output. The output element is such as a light-emitting element.