US 12,094,445 B2
Vibration generating device and display apparatus including 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 Aug. 17, 2023, as Appl. No. 18/451,368.
Application 18/451,368 is a continuation of application No. 17/218,620, filed on Mar. 31, 2021, granted, now 11,776,519.
Claims priority of application No. 10-2020-0039505 (KR), filed on Mar. 31, 2020.
Prior Publication US 2023/0395054 A1, Dec. 7, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 3/16 (2006.01); G06F 1/16 (2006.01); G06V 40/12 (2022.01); G10K 9/122 (2006.01)
CPC G10K 9/122 (2013.01) [G06F 1/1605 (2013.01); G06F 3/16 (2013.01)] 41 Claims
OG exemplary drawing
 
1. A vibration generating device, comprising:
a piezoelectric structure including a first region and a second region,
wherein:
the first region has a vibration characteristic of a first frequency;
the second region has a vibration characteristic of a second frequency which differs from the first frequency;
a lateral surface of the first region is directly coupled to a lateral surface of the second region without a coupling medium;
the first region and the second region have a same thickness;
the first region is configured as one or more of a haptic actuator, a speaker actuator, and a receiver actuator;
the second region is configured as a sensing actuator or a fingerprint sensing actuator;
each of the first region and the second region comprises a plurality of first portions having a piezoelectric characteristic, and a second portion disposed between the plurality of first portions; and
a width of the first portion of the second region is less than a width of the first portion of the first region.