公开(公告)号：US11411161B2

公开(公告)日：2022-08-09

申请号：US16849828

申请日：2020-04-15

Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

Inventor： Chih-Hsiou Lin ,  Shih-Ting Lin ,  Chung-Yuan Su ,  Chao-Ta Huang

IPC: G06F3/041 ,  G09G5/08 ,  H01L41/04 ,  G01L1/16 ,  H01L41/113

Abstract: A piezoelectric system comprises a piezoelectric sensor, a voltage stabilizer, a discharger and an operation sensor. The piezoelectric sensor outputs a sensing signal through a sensor output terminal according to a rate of change of pressure. The voltage stabilizer has a positive terminal electrically connecting with the sensor output terminal. The voltage stabilizer receives the sensing signal, stores the energy of the sensing signal, and keeps the voltage of the sensing signal as a constant when the rate of change of pressure is zero. The discharger has a first terminal connecting with the positive terminal, a second terminal coupled to ground, and a control terminal receiving a trigger signal to control the first terminal to conduct with or not conduct with the second terminal. The operation sensor electrically connects to the control terminal for sensing an operation generating the pressure and outputs the trigger signal accordingly.