公开(公告)号：US20230241646A1

公开(公告)日：2023-08-03

申请号：US18157319

申请日：2023-01-20

Applicant: Shanghai Tianma Micro-Electronics Co., Ltd.

Inventor： Kenji SERA ,  Kenichi HAYASHI ,  Hiroshi HAGA ,  Shin TAKEUCHI

IPC: B06B1/06 ,  H10N30/045

CPC classification number: B06B1/0692 ,  H10N30/045

Abstract: A method of manufacturing a piezoelectric element array board includes fabricating a plurality of piezoelectric element control circuits including one or more thin-film transistors on a substrate, fabricating a plurality of piezoelectric elements on the substrate, and poling a piezoelectric material by applying an electric field to a piezoelectric material layer of the plurality of piezoelectric elements while maintaining the one or more thin-film transistors in a state of generating higher leakage current, after fabricating the plurality of piezoelectric elements and the plurality of piezoelectric element control circuits.

公开(公告)号：US20230386246A1

公开(公告)日：2023-11-30

申请号：US18322343

申请日：2023-05-23

Applicant: Shanghai Tianma Micro-Electronics Co., Ltd.

Inventor： Hiroshi HAGA ,  Shin TAKEUCHI ,  Kenji SERA ,  Kenichi HAYASHI ,  Feng LU ,  Haochi YU ,  QiJun YAO

IPC: G06V40/13

CPC classification number: G06V40/1306 ,  G06V40/1365

Abstract: An ultrasonic sensor device includes a plurality of pixels each including an ultrasonic transducer, and a control circuit configured to control the plurality of pixels. Each of the plurality of pixels is configured to hold a signal received by the ultrasonic transducer therein and send the signal to the control circuit as a response signal. The control circuit is configured to acquire an excitation response signal, which is a response signal sent from a pixel after the ultrasonic transducer therein is excited, acquire a non-excitation response signal, which is a response signal sent from a pixel when the ultrasonic transducer therein is not excited, and correct the excitation response signal based on the non-excitation response signal.