US 12,069,953 B2
Piezoelectric element, piezoelectric device including the same, and vibration module and display apparatus including the piezoelectric device
Taeheon Kim, Paju-si (KR); Sahn Nahm, Seoul (KR); YongGyoon Jang, Paju-si (KR); Jonghyun Kim, Seoul (KR); Ku-Tak Lee, Seoul (KR); Chiwan Kim, Paju-si (KR); Sung-Eui Shin, Paju-si (KR); YongWoo Lee, Paju-si (KR); and Seok-June Chae, Changwon-si (KR)
Assigned to LG DISPLAY CO., LTD., Seoul (KR); and KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION, Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR); and Korea University Research and Business Foundation, Seoul (KR)
Filed on Sep. 5, 2023, as Appl. No. 18/242,508.
Application 17/893,881 is a division of application No. 16/886,150, filed on May 28, 2020, granted, now 11,462,675, issued on Oct. 4, 2022.
Application 18/242,508 is a continuation of application No. 17/893,881, filed on Aug. 23, 2022, granted, now 11,812,666.
Claims priority of application No. 10-2019-0063448 (KR), filed on May 29, 2019.
Prior Publication US 2023/0422625 A1, Dec. 28, 2023
Int. Cl. H10N 30/853 (2023.01); G06F 1/16 (2006.01); G06F 3/01 (2006.01); G06F 3/041 (2006.01); G10K 9/122 (2006.01)
CPC H10N 30/8542 (2023.02) [G06F 1/1605 (2013.01); G06F 3/016 (2013.01); G06F 3/0412 (2013.01); G10K 9/122 (2013.01)] 20 Claims
OG exemplary drawing
 
17. A vibration module, comprising:
a first electrode;
a piezoelectric element layer on the first electrode;
a second electrode on the piezoelectric element layer; and
a vibration member on the second electrode,
wherein:
the piezoelectric element layer includes a piezoelectric element comprising a compound represented by Formula 1,
(1−x)(LizNa0.5-zK0.5)(Nb1-ySby)O3·xCaZrO3  [Formula 1]
where x, y, and z have a range of 0.001≤x≤0.2, a range of 0.01≤y≤0.5, and a range of 0≤z≤0.2, respectively, and
wherein a piezoelectric constant of the piezoelectric element is 122 pC/N or higher.