PURPOSE: A public transportation advertisement display operation method which uses energy generated from a piezoelectric device and an apparatus thereof are provided to highlight environment-friendly properties of public transportation by directly displaying the amount of energy generated from using the public transportation. CONSTITUTION: A power generation part(210) produces power using a piezoelectric device. An energy check part(220) monitors generated energy. An energy display part(230) displays energy information received from the energy check part on a display apparatus.
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