US 11,812,666 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 Aug. 23, 2022, as Appl. No. 17/893,881.
Application 17/893,881 is a division of application No. 16/886,150, filed on May 28, 2020, granted, now 11,462,675.
Claims priority of application No. 10-2019-0063448 (KR), filed on May 29, 2019.
Prior Publication US 2022/0406989 A1, Dec. 22, 2022
Int. Cl. H10N 30/853 (2023.01); G06F 3/041 (2006.01); G10K 9/122 (2006.01); G06F 1/16 (2006.01); G06F 3/01 (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)] 24 Claims
OG exemplary drawing
 
16. A piezoelectric device, comprising:
a first electrode;
a piezoelectric element layer on the first electrode, the piezoelectric element layer including a piezoelectric element; and
a second electrode on the piezoelectric element layer,
wherein the piezoelectric element comprises a compound represented by Formula 3,
(1−x)(Na0.5K0.5)(Nb1−ySby)O3·xCaZrO3  [Formula 3]
where x and y have a range of 0.001≤x≤0.2 and a range of 0.01≤y≤0.11, respectively, and
a piezoelectric constant d33 of the piezoelectric element is 122 pC/N or higher and 518 pC/N or lower.