Polymer-based piezoelectric composite material, piezoelectric film, piezoelectric speaker, and flexible display

Abstract

The present invention provides a polymer-based piezoelectric composite material from which a piezoelectric film capable of outputting a higher sound pressure is obtained in a case of using a piezoelectric speaker, a piezoelectric film formed of the polymer-based piezoelectric composite material, and a piezoelectric speaker and a flexible display which are formed of the piezoelectric film. The polymer-based piezoelectric composite material of the present invention is a polymer-based piezoelectric composite material including a polymer matrix which contains a polymer containing a group represented by Formula (1), and piezoelectric particles. *-L1-CR1R2—CN  Formula (1) In Formula (1), L1 represents a divalent linking group excluding a divalent aliphatic hydrocarbon group. R1 and R2 each independently represent a hydrogen atom, an alkyl group, or an aryl group.

Dependencies are inferred from the claim text.