Patent ID: 9276191
Filing Date: 2016-03-01
CPC Classification: G06F,H01L,H04R

Claim Text:
1. A piezoelectric device comprising: a piezoelectric element comprising at least one piezoelectric body comprising a piezoelectric polymer film having electrodes on both main surfaces thereof; an inputting unit for inputting predetermined information to said piezoelectric element; a memory for storing temperature dependency information comprising a piezoelectric constant and a Young's modulus of said piezoelectric polymer film, and electrostatic capacitance of said piezoelectric element; a measuring unit for measuring the electrostatic capacitance of said piezoelectric element, said measuring unit having an execution mode and a non-execution mode; a correction unit for correcting said input information based on said temperature dependency information and said electrostatic capacitance measured by said measuring unit; and a switch for switching between said execution mode of said measuring unit and said non-execution mode of said measuring unit, wherein when said measuring unit is set in said execution mode, the measurement unit measures the electrostatic capacitance of said piezoelectric element and said correction unit determines a temperature of said piezoelectric element based on a measured result of said measuring unit and the temperature dependency information of said electrostatic capacitance, and wherein when said measuring unit is set in said non-execution mode, said correcting unit corrects said input information based on the determined temperature and said temperature dependency information.