US 12,142,069 B2
Composite piezoelectric element and electronic device having the same
YuSeon Kho, Paju-si (KR); Yong-Su Ham, Paju-si (KR); and YongWoo Lee, Paju-si (KR)
Assigned to LG DISPLAY CO., LTD., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Sep. 8, 2023, as Appl. No. 18/244,003.
Application 18/244,003 is a continuation of application No. 17/115,286, filed on Dec. 8, 2020, granted, now 11,790,686.
Claims priority of application No. 10-2019-0162932 (KR), filed on Dec. 9, 2019.
Prior Publication US 2023/0419718 A1, Dec. 28, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H01L 41/08 (2006.01); G06F 3/01 (2006.01); G06F 3/16 (2006.01); G06V 40/13 (2022.01); A61B 5/1172 (2016.01)
CPC G06V 40/1306 (2022.01) [G06F 3/016 (2013.01); G06F 3/16 (2013.01); A61B 5/1172 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A composite piezoelectric element, comprising:
a plurality of first portions having flexibility; and
a plurality of second portions having different piezoelectric characteristics, each of the plurality of second portions being between the plurality of first portions,
wherein the plurality of second portions comprises:
a first piezoelectric body having a first cavity;
a second piezoelectric body having a second cavity different from the first cavity; and
a third piezoelectric body without a cavity,
wherein the first and second piezoelectric bodies are used as an ultrasonic sensor, and
wherein the third piezoelectric body is used as at least one of a haptic actuator, a speaker actuator, and a receiver actuator.