Patent ID: 11882398
Assignee: LG DISPLAY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 20:
21. A vibration apparatus, comprising:
a lower vibration structure;
an upper vibration structure on the lower vibration structure; and
an adhesive member between the lower vibration structure and the upper vibration structure,
wherein the lower vibration structure and the upper vibration structure are configured to generate sound waves having different frequencies,
wherein each of the lower vibration structure and the upper vibration structure comprises:
a first base member;
a second base member overlapping the first base member; and
a vibration generating part disposed between the first base member and the second base member and configured to include a plurality of inorganic material portions including a piezoelectric material and a flexible portion between the plurality of inorganic material portions, and

wherein each of the plurality of inorganic material portions disposed at the upper vibration structure overlaps each of the plurality of inorganic material portions disposed at the lower vibration structure.