公开(公告)号：US20220199896A1

公开(公告)日：2022-06-23

申请号：US17559687

申请日：2021-12-22

Applicant: LG DISPLAY CO., LTD. ,  KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION

Inventor： YongWoo LEE ,  Chiwan KIM ,  Yong-Su HAM ,  YuSeon KHO ,  Seunghyun SUNG ,  Sahn NAHM ,  Dae-Su KIM ,  Su-Hwan GO ,  Jae-Min EUM ,  Ho-Sung SHIN

IPC: H01L41/43 ,  H01L41/047

Abstract: Compositions are disclosed that comprise a piezoelectric material according to Chemical Formula 1: (1−y)(NaaK1-a)(Nb1-x,Sbx)-ySrZrO3+n mol % CuO, wherein 0.01≤y≤0.10, 0.4≤a≤0.6, 0≤x≤0.06, and 0.5≤n≤1.5. The compositions can further comprise a first material, and a second material surrounded by the first material. A piezoelectric device is also described, which includes a piezoelectric device layer including a composition of Chemical Formula 1, and having a first material layer and a second material layer surrounded by the first material layer; a first electrode part disposed on a first surface of the piezoelectric device layer; and a second electrode part disposed on a second surface facing the first surface.

公开(公告)号：US20210400396A1

公开(公告)日：2021-12-23

申请号：US17464660

申请日：2021-09-01

Applicant: LG Display Co., Ltd.

Inventor： YongGyoon JANG ,  Chiwan KIM ,  Taeheon KIM ,  Sung-Eui SHIN ,  YongWoo LEE ,  Kyungyeol RYU ,  YuSeon KHO

IPC: H04R17/00 ,  H04R1/02

Abstract: A display apparatus includes a display panel including configured to display an image and a sound generating device on a rear surface of the display panel, the sound generating device being configured to vibrate the display panel to generate sound. The sound generating device includes a first structure and a second structure over or under the first structure, the second structure including a first part having a piezoelectric characteristic and a second part between adjacent first parts to have flexibility.

公开(公告)号：US20210400394A1

公开(公告)日：2021-12-23

申请号：US17463546

申请日：2021-08-31

Applicant: LG Display Co., Ltd.

Inventor： Chiwan KIM ,  Kyungyeol RYU ,  YuSeon KHO ,  YongGyoon JANG

IPC: H04R17/00 ,  G06F3/01 ,  H01L41/04 ,  H04R1/20

Abstract: A display apparatus includes: a display panel configured to display an image, and at least one vibration module on a rear surface of the display panel, the at least one vibration module including a piezoelectric composite layer including a plurality of sub-modules configured to vibrate the display panel, each of the plurality of sub-modules including: a plurality of first portions including a piezoelectric characteristic, and a plurality of second portions having flexibility, each of the plurality of second portions being between a respective pair of the plurality first portions, wherein the plurality of first portions in the respective sub-modules are arranged in a same direction or are partially arranged in different directions.

公开(公告)号：US20210325968A1

公开(公告)日：2021-10-21

申请号：US17359243

申请日：2021-06-25

Applicant: LG Display Co., Ltd.

Inventor： Chiwan KIM ,  Taeheon KIM ,  Sung-Eui SHIN ,  YongWoo LEE ,  Kyungyeol Ryu ,  YuSeon KHO ,  YongGyoon JANG

IPC: G06F3/01 ,  H01L27/32 ,  G02F1/1368 ,  G02F1/1333 ,  G06F3/041 ,  B60K37/04 ,  B06B1/06

Abstract: The present disclosure relates to a vibration generation device, a display apparatus including the vibration generation device, and a vehicle including the vibration generation device. A vibration generation device includes a piezoelectric ceramic part having a certain interval, a piezoelectric material layer between the piezoelectric ceramic parts, and an electrode part configured to provide electric field to one or more of the piezoelectric ceramic part and the piezoelectric material layer.

公开(公告)号：US20210183966A1

公开(公告)日：2021-06-17

申请号：US17111980

申请日：2020-12-04

Applicant: LG Display Co., Ltd.

Inventor： YuSeon KHO ,  Yong-Su HAM ,  YongWoo LEE

IPC: H01L27/32 ,  G06F3/01 ,  H01L51/52 ,  H01L41/09

Abstract: A display apparatus includes a display panel configured to display an image and a plurality of vibration generating devices configured to vibrate the display panel. Each of the plurality of vibration generating devices includes a plurality of first portions having a piezoelectric characteristic and a plurality of second portions disposed near the plurality of first portions to have an expansion coefficient, and the plurality of vibration generating devices have different expansion coefficients.

公开(公告)号：US20210168479A1

公开(公告)日：2021-06-03

申请号：US17177058

申请日：2021-02-16

Applicant: LG Display Co., Ltd.

Inventor： Taeheon KIM ,  Chiwan KIM ,  Sung-Eui SHIN ,  YongWoo LEE ,  Kyungyeol Ryu ,  YuSeon KHO ,  YongGyoon JANG

IPC: H04R1/02 ,  H01L41/053 ,  H01L41/193 ,  H04R17/00 ,  H01L41/09 ,  H01L27/20

Abstract: A display apparatus includes a display panel configured to display an image and a sound generating device on a rear surface of the display panel. The sound generating device is configured to vibrate the display panel to generate sound. The sound generating device includes a first structure and a first passivation layer on one side of the first structure, at least a portion of the first passivation layer having a non-flat shape.

公开(公告)号：US20200314557A1

公开(公告)日：2020-10-01

申请号：US16447353

申请日：2019-06-20

Applicant: LG Display Co., Ltd.

Inventor： Kyungyeol RYU ,  Chiwan KIM ,  YuSeon KHO ,  YongGyoon JANG

IPC: H04R17/00 ,  H01L41/047 ,  H01L41/08 ,  H01L41/09 ,  H01L41/37 ,  H01L41/083 ,  H04R7/02 ,  B06B1/06

Abstract: A display apparatus includes a display module having a display panel configured to display an image, a sound generation module disposed at the display module and configured to vibrate the display module to generate sound, a first cover configured to cover a first periphery portion of the display module, and a plurality of ultrasonic generation modules disposed between the first periphery portion of the display module and the first cover. The first cover includes a plurality of first holes overlapping with the plurality of ultrasonic generation modules.

公开(公告)号：US20190163314A1

公开(公告)日：2019-05-30

申请号：US16201793

申请日：2018-11-27

Applicant: LG Display Co., Ltd.

Inventor： Chiwan KIM ,  Taeheon KIM ,  Sung-Eui SHIN ,  YongWoo LEE ,  Kyungyeol RYU ,  YuSeon KHO

IPC: G06F3/041 ,  G06F3/044

Abstract: A touch panel includes a plurality of first electrodes which extends in a first direction. The touch panel further includes an electroactive layer which is disposed on the plurality of first electrodes and is formed of an electroactive material. The touch panel further includes a plurality of second electrodes which is disposed on the electroactive layer and extends in a second direction which is different from the first direction. The touch panel further includes an insulating layer which is disposed to cover the electroactive layer and the plurality of second electrodes. The touch panel further includes a plurality of third electrodes which is disposed on the insulating layer and extends in the second direction.

公开(公告)号：US20190113977A1

公开(公告)日：2019-04-18

申请号：US16163262

申请日：2018-10-17

Applicant: LG DISPLAY CO., LTD.

Inventor： ChiWan KIM ,  TaeHeon KIM ,  SungEui SHIN ,  YongWoo LEE ,  KyungYeol RYU ,  YuSeon KHO

IPC: G06F3/01 ,  G06F3/041 ,  C08G79/025

Abstract: Provided is a touch sensitive device including an electroactive layer formed of an electroactive matrix, wherein the electroactive matrix has a structure in which a piezoelectric ceramic and an electroactive polymer (EAP) are bonded and an electrode disposed on at least one surface of the electroactive layer. According to an exemplary embodiment of the present disclosure, the touch sensitive device uses an electroactive matrix has an excellent transparency, can be made thin, and has a high piezoelectric property so that the light transmittance and the vibration intensity of the touch sensitive device can be improved.

公开(公告)号：US20190014420A1

公开(公告)日：2019-01-10

申请号：US16029209

申请日：2018-07-06

Applicant: LG DISPLAY CO., LTD.

Inventor： Taeheon KIM ,  Chiwan KIM ,  Sung-Eui SHIN ,  YongWoo LEE ,  Kyungyeol RYU ,  YuSeon KHO

IPC: H04R19/02 ,  H04R1/02

Abstract: Discussed are a film speaker and a display device. The film speaker includes an electroactive layer including a first surface and a second surface opposite to the first surface, and further including a plurality of concave portions; and a first electrode and a second electrode disposed on at least one of the first surface and the second surface. Therefore, the sound generated in the film speaker may be further amplified and the sound pressure level may be improved.