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.

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：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：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.