公开(公告)号：US11442583B2

公开(公告)日：2022-09-13

申请号：US16966394

申请日：2020-01-17

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Wenqu Liu ,  Xiufeng Li ,  Qi Yao ,  Feng Zhang ,  Liwen Dong ,  Zhao Cui ,  Chuanxiang Xu ,  Detian Meng ,  Xiaoxin Song ,  Libo Wang ,  Yang Yue ,  Dongfei Hou ,  Zhijun Lv

IPC: G06F3/043 ,  H01L41/04 ,  H01L41/047 ,  H01L41/083 ,  H01L41/113 ,  H01L41/27 ,  G06F3/044 ,  G06F3/041 ,  G06V40/13 ,  G06V40/12

Abstract: A fingerprint identification module, a manufacturing method thereof and an electronic device are disclosed. In the fingerprint identification module, an auxiliary structure is at least partially located on a functional substrate, and a plurality of first driving electrodes are on a side, away from the functional substrate, of the piezoelectric material and the auxiliary structure; each first driving electrode extends along a first direction and exceeds a first edge of the piezoelectric material layer in the first direction; the plurality of first driving electrodes are arranged at intervals along a second direction; the auxiliary structure is at least in contact with the first edge; the auxiliary structure includes a slope portion; and a thickness of the slope portion in a direction perpendicular to the functional substrate gradually decreases in a direction from the first edge to a position away from a center of the piezoelectric material layer.

公开(公告)号：US11361576B2

公开(公告)日：2022-06-14

申请号：US16762271

申请日：2019-05-21

Applicant: BOE Technology Group Co., Ltd.

Inventor： Xiufeng Li ,  Yingming Liu ,  Xiaoliang Ding ,  Lijun Zhao ,  Haisheng Wang ,  Yanling Han

IPC: G01S7/52 ,  G06V40/13 ,  G01S15/89 ,  G10K9/122

Abstract: A circuit for generating and detecting ultrasonic sensing signals is provided. A piezoelectric device having a transmitting electrode and a receiving electrode is coupled to a biasing-and-sampling sub-circuit configured to set different bias voltages to the receiving electrode. The piezoelectric device is configured to transmit an ultrasonic signal upon applying an exciting pulse signal to the transmitting electrode and alternatively to generate a voltage signal at the receiving electrode upon receiving an echo signal based on the ultrasonic signal. A signal-collecting sub-circuit is coupled to the receiving electrode to determine a first sampling voltage based on the voltage signal at the receiving electrode in a first sampling period and a second sampling voltage based on the voltage signal at the receiving electrode in a second sampling period. An output sub-circuit is coupled to the signal-collecting sub-circuit for outputting the first sampling voltage and the second sampling voltage at a same time.

公开(公告)号：US11134334B2

公开(公告)日：2021-09-28

申请号：US16529132

申请日：2019-08-01

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Yanling Han ,  Xue Dong ,  Haisheng Wang ,  Yingming Liu ,  Lijun Zhao ,  Chenyang Zhang ,  Peixiao Li ,  Yuzhen Guo ,  Xiufeng Li

IPC: H04R17/00 ,  H04R1/28 ,  H01L41/09 ,  H01L41/08

Abstract: A sounding device, a manufacturing method thereof and a display device are provided. The sounding device includes at least two sounding units. Each of the sounding units includes: a transparent structural layer, including a recess and a supporting member located around the recess; and a piezoelectric vibrating film covering the recess, a cavity is formed by the piezoelectric vibrating film and the supporting member. The piezoelectric vibrating film includes a base film covering the recess; and at least one piezoelectric structure located on a side of the cavity away from the transparent structural layer. Each of the at least one piezoelectric structure includes: a first electrode; a piezoelectric material layer located on a side of the first electrode away from the cavity; and a second electrode located on a side of the piezoelectric material layer away from the first electrode.

公开(公告)号：US11120243B2

公开(公告)日：2021-09-14

申请号：US16575716

申请日：2019-09-19

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Yingming Liu ,  Haisheng Wang ,  Xiaoliang Ding ,  Pengpeng Wang ,  Xiufeng Li ,  Chenyang Zhang ,  Peixiao Li

IPC: G06K9/00 ,  H01L41/18 ,  G06F3/01

Abstract: A fingerprint identification module, a manufacturing method thereof, a driving method thereof, and a display device are disclosed. The fingerprint identification module includes: a plurality of ultrasonic wave receiving sensors, configured to receive an ultrasonic wave; and at least one ultrasonic wave emission sensor, configured to emit an ultrasonic wave, each of the plurality of ultrasonic wave receiving sensors includes a first piezoelectric material layer, each of the at least one ultrasonic wave emission sensor includes a second piezoelectric material layer, and a material of the first piezoelectric material layer is different from a material of the second piezoelectric material layer.