CPC H04R 17/005 (2013.01) [H10N 30/092 (2023.02); H10N 30/1061 (2023.02); H10N 30/206 (2023.02); H10N 30/50 (2023.02); H10N 30/87 (2023.02); H04R 2201/003 (2013.01); H04R 2499/15 (2013.01)] | 23 Claims |
1. A vibration module, comprising:
a piezoelectric composite layer, including:
a plurality of piezoelectric portions and a flexible portion between the plurality of piezoelectric portions;
a first electrode layer on a first surface of the plurality of piezoelectric portions and a first surface of the flexible portion; and
a second electrode layer on a second surface of the plurality of piezoelectric portions and a second surface of the flexible portion,
wherein each of the first surface and the second surface is configured to have a plane surface structure,
wherein the plurality of piezoelectric portions is spaced apart from one another along a first direction,
wherein each of the plurality of piezoelectric portions has a line shape along a second direction crossing to the first direction, and
wherein at least two of the plurality of piezoelectric parts have different lengths along the second direction.
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