CPC H04R 17/005 (2013.01) [H04R 1/028 (2013.01); H04R 2499/15 (2013.01)] | 32 Claims |
1. A display apparatus, comprising:
a display panel configured to display an image; and
a sound generating device at a rear surface of the display panel, the sound generating device being configured to vibrate the display panel and generate sound, the sound generating device comprising:
a first electrode;
a first structure under the first electrode, the first structure comprising a polymer matrix and a piezoelectric material dispersed in the polymer matrix;
a second electrode under the first structure;
a second structure over the first electrode, the second structure comprising:
a first part having a piezoelectric characteristic; and
a second part between adjacent first parts and having flexibility, the second part including a different material from the first part; and
a third electrode between the display panel and the second structure,
wherein the first part and the second part are alternatively disposed along a horizontal direction and have a same thickness in a vertical direction, and
wherein a polarization direction of the first structure is different from a polarization direction of the second structure.
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