公开(公告)号：US11062114B2

公开(公告)日：2021-07-13

申请号：US16896916

申请日：2020-06-09

Applicant: LG Display Co., Ltd.

Inventor： JaeHyun Kim ,  TaeHyoung Moon ,  SungJin Lee ,  DeukHo Yeon

IPC: G06K9/00 ,  H01L41/047

Abstract: A display device comprises a display panel and a sensor, wherein the sensor includes a first piezoelectric material layer, a second piezoelectric material layer disposed under the first piezoelectric material layer to overlap the first piezoelectric material layer, a first common electrode disposed on the first piezoelectric material layer; a first sensor pixel electrode disposed under the second piezoelectric material layer, and a first element layer disposed under the first sensor pixel electrode and connected with the first sensor pixel electrode.

公开(公告)号：US20240222463A1

公开(公告)日：2024-07-04

申请号：US18514318

申请日：2023-11-20

Applicant: LG Display Co., Ltd.

Inventor： DeukHo Yeon ,  SunWook Ko ,  KiTae Kim

IPC: H01L29/49 ,  H01L29/786 ,  H10K59/124

CPC classification number: H01L29/4908 ,  H01L29/78648 ,  H10K59/124 ,  H01L29/7869

Abstract: Disclosed is a thin film transistor and a display device including the same. The thin film transistor includes a first buffer layer; a lower gate electrode on the first buffer layer; a second buffer layer on the lower gate electrode; an active layer on the second buffer layer and including a source region, a drain region, and a channel region between the source region and the drain region; a gate insulating layer on the active layer; and an upper gate electrode on the gate insulating layer. At least one of the upper gate electrode and the lower gate electrode includes a plurality of layers, and a work function of a layer adjacent to the active layer is greater than a work function of a layer far from the active layer, among the plurality of layers.

公开(公告)号：US11152444B2

公开(公告)日：2021-10-19

申请号：US16528270

申请日：2019-07-31

Applicant: LG Display Co., Ltd.

Inventor： Mijin Jeong ,  JaeHyun Kim ,  DeukHo Yeon

IPC: H01L27/32

Abstract: A display panel and a display device includes a high-permittivity material disposed between electrodes of capacitor disposed in a subpixel. This increases the capacitance per area of the capacitor, such that a high-resolution display device is provided. A high-permittivity material is disposed in the insulating layer, and the surface of the insulating layer is planarized by polishing. The high-permittivity material is prevented from residing in any area, except for the area in which the capacitor is disposed. An unnecessary increase in load in the subpixel is prevented, and the capacitance of the capacitor is increased.

公开(公告)号：US11081534B2

公开(公告)日：2021-08-03

申请号：US16895633

申请日：2020-06-08

Applicant: LG Display Co., Ltd.

Inventor： DeukHo Yeon ,  TaeHyoung Moon ,  JaeHyun Kim ,  SungJin Lee

IPC: H01L27/12 ,  H01L27/32 ,  G09G3/22 ,  G06K9/00

Abstract: Provided are a display panel and a display device. After deposition of a thin-film transistor layer and a display layer in which emitting devices are disposed, a sensing layer including a piezoelectric material is disposed under the thin-film transistor layer to facilitate implementation of a display panel having built-in piezoelectric devices. Further, as thin-film transistors for ultrasonic sensing and thin-film transistors for display driving are disposed in different layers, a display panel capable of ultrasonic sensing in an active area may be provided without affecting a display resolution or implementation of display pixels.

公开(公告)号：US11283053B2

公开(公告)日：2022-03-22

申请号：US16535860

申请日：2019-08-08

Applicant: LG Display Co., Ltd.

Inventor： JaeHyun Kim ,  DeukHo Yeon

IPC: H01L51/00 ,  H01L51/52 ,  H01L27/32 ,  H01L51/50 ,  G02B1/118 ,  G06F3/044

Abstract: A display panel has a nanoscaled moth-eye pattern that is patterned and disposed on at least one layer disposed on a path along which light emitted from light-emitting diodes emerges, such that transmittance of light emerging outward from the display panel can be increased while reducing reflectance of external light. Further, an anti-reflector is disposed on an area other than a light-emitting area, and the moth-eye pattern is disposed on open areas of the anti-reflector. Thereby, it is possible to suppress reflected light and prevent reflection of external light on an area on which the anti-reflector cannot be disposed.

公开(公告)号：US11249599B2

公开(公告)日：2022-02-15

申请号：US16897079

申请日：2020-06-09

Applicant: LG Display Co., Ltd.

Inventor： TaeHyoung Moon ,  JaeHyun Kim ,  SungJin Lee ,  DeukHo Yeon

IPC: G06F3/043 ,  G06F3/041

Abstract: An ultrasonic sensor and a display device is disclosed where a piezoelectric material disposed in each pixel area of the ultrasonic sensor is formed to have various thicknesses, or an electrode driving the piezoelectric material disposed in each pixel area has various areas, thereby providing the ultrasonic sensor that generates ultrasonic waves in various frequency bands. Accordingly, it can expand the frequency band of the ultrasonic waves generated by the ultrasonic sensor to improve its sensing performance, and obtain information of various frequency bands to provide the ultrasonic sensor capable of both the fingerprint sensing and the proximity sensing.

公开(公告)号：US20240224631A1

公开(公告)日：2024-07-04

申请号：US18529058

申请日：2023-12-05

Applicant: LG Display Co., Ltd.

Inventor： DeukHo Yeon ,  KiTae Kim ,  SunWook Ko

IPC: H10K59/126 ,  H10K59/121 ,  H10K59/122

CPC classification number: H10K59/126 ,  H10K59/1213 ,  H10K59/122

Abstract: A display device includes a substrate including an active area including a plurality of pixels and a non-active area located to surround the active area; a first thin film transistor disposed on the substrate and a second thin film transistor disposed to be spaced apart from the first thin film transistor; a planarization layer covering the first thin film transistor and the second thin film transistor; a first shielding layer disposed on the planarization layer; a light emitting element including an anode disposed on the planarization layer to be spaced apart from the first shielding layer; and a second shielding layer disposed on the anode. Accordingly, reliability of the display device can be improved by increasing a light shielding area in the display device.

公开(公告)号：US11653570B2

公开(公告)日：2023-05-16

申请号：US16902127

申请日：2020-06-15

Applicant: LG Display Co., Ltd.

Inventor： DeukHo Yeon ,  TaeHyoung Moon ,  JaeHyun Kim ,  Sungjin Lee

IPC: H01L41/113 ,  G01H11/08 ,  H01L41/08 ,  H01L41/047

CPC classification number: H01L41/1132 ,  G01H11/08 ,  H01L41/0474 ,  H01L41/081

Abstract: A piezoelectric sensor includes: a lower substrate; a plurality of sensing transistors that are disposed on the lower substrate; a lower electrode that is disposed to cover the plurality of sensing transistors; a piezoelectric material layer that is disposed on the lower electrode; and an upper electrode that is disposed on the piezoelectric material layer. The piezoelectric material layer has a first thickness in a plurality of first areas in which the plurality of sensing transistors are disposed and has a second thickness which is greater than the first thickness in a second area in which the plurality of sensing transistors are not disposed. Accordingly, it is possible to further accurately and finely detect various types of biometric information.

公开(公告)号：US11373428B2

公开(公告)日：2022-06-28

申请号：US16901848

申请日：2020-06-15

Applicant: LG DISPLAY CO., LTD.

Inventor： TaeHyoung Moon ,  JaeHyun Kim ,  SungJin Lee ,  DeukHo Yeon

IPC: G06K9/00 ,  G06V40/13 ,  B06B1/06 ,  H01L27/15 ,  H01L27/32 ,  B06B1/02 ,  H01L29/786 ,  H01L27/12

Abstract: A display device can include a display panel including display pixels having light emitting elements, and sensing pixels including piezoelectric elements; and a driving circuit configured to drive the display panel, in which the display panel further includes a substrate; a thin film transistor array disposed on the substrate, the thin film transistor array including display driving transistors included in the display pixels; a sensor array disposed on the thin film transistor array, the sensor array including sensor driving transistors included in the sensing pixels; a piezoelectric element layer disposed on the sensor array, the piezoelectric element layer including the piezoelectric elements connected to the sensor driving transistors; and a light emitting element layer disposed on the piezoelectric element layer, the light emitting element layer including the light emitting elements, and anode electrodes of the light emitting elements are connected to the display driving transistors.