PIEZOELECTRIC SPEAKER
    2.
    发明公开

    公开(公告)号:EP3716646A1

    公开(公告)日:2020-09-30

    申请号:EP18881786.0

    申请日:2018-11-20

    摘要: A piezoelectric speaker (10) includes a piezoelectric film (35), a first joining layer (51), and an interposed layer (40). The piezoelectric film (35) includes a first electrode (61), a second electrode (62), and a piezoelectric body (30) sandwiched by the first electrode (61) and the second electrode (62). The first joining layer (51) is a layer having pressure-sensitive adhesiveness or adhesiveness. The interposed layer (40) is disposed between the piezoelectric film (35) and the first joining layer (51). Both principal surfaces of the piezoelectric film (35) vibrate up and down as a whole.