US 11,930,320 B2
Flexible vibration module and display apparatus including the same
YongWoo Lee, Paju-si (KR); Yong-Su Ham, Paju-si (KR); Taeheon Kim, Paju-si (KR); and Sung-Eui Shin, Paju-si (KR)
Assigned to LG DISPLAY CO., LTD., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Nov. 1, 2022, as Appl. No. 17/978,878.
Application 17/978,878 is a continuation of application No. 17/180,560, filed on Feb. 19, 2021, granted, now 11,533,566.
Application 17/180,560 is a continuation of application No. 16/443,090, filed on Jun. 17, 2019, granted, now 10,959,025, issued on Mar. 23, 2021.
Claims priority of application No. 10-2019-0037507 (KR), filed on Mar. 29, 2019.
Prior Publication US 2023/0049229 A1, Feb. 16, 2023
Int. Cl. H04R 17/00 (2006.01); H10N 30/00 (2023.01); H10N 30/092 (2023.01); H10N 30/20 (2023.01); H10N 30/50 (2023.01); H10N 30/87 (2023.01)
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
OG exemplary drawing
 
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.