Patent ID: 11902739
Assignee: LG DISPLAY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 0:
1. A display device comprising:
a piezoelectric element vibrating in accordance with input audio signals;
a display panel configured to display an image; and
an elastic member configured to connect a portion of the piezoelectric element and the display panel so as to transmit a vibration of the piezoelectric element to the display panel,
wherein at least one end of the piezoelectric element is not connected to the elastic member and there is a gap between the piezoelectric element and a rear surface of the display panel,
wherein the piezoelectric element includes:
a first electrode directly connected to the elastic member,
wherein a horizontal length of the elastic member is shorter than that of the first electrode;
a first piezoelectric layer disposed on the first electrode;
a second electrode disposed on the first piezoelectric layer;
a second piezoelectric layer disposed on the second electrode; and
a third electrode disposed on the second piezoelectric layer,
wherein polarization directions of the first piezoelectric layer and the second piezoelectric layer are the same,
wherein the input audio signals having a same phase are input to the first electrode and the third electrode,
wherein the first piezoelectric layer and the second piezoelectric layer are deformed in different directions,
wherein the piezoelectric element and the elastic member have different shapes, and
wherein the elastic member has a non-rectangular shape.