公开(公告)号：US12008834B2

公开(公告)日：2024-06-11

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 ,  G06V40/12

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.

公开(公告)号：US11966514B2

公开(公告)日：2024-04-23

申请号：US17991633

申请日：2022-11-21

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

Inventor： Shin Takeuchi ,  Hiroshi Haga

IPC: G06F3/043 ,  G06F3/01

CPC classification number: G06F3/016

Abstract: A tactile presentation device includes a panel, a first supporting member that secures and supports a first end of the panel, a vibration generator disposed at a position facing the first supporting member across a target area to be touched by a user on the panel, and a driving control device that provides the vibration generator with a driving signal. The driving control device makes only the vibration generator vibrate to form a standing wave in an area including the target area between the vibration generator and the first end. A first vibration reflection rate at the first end for a carrier wave from the vibration generator is negative. A second vibration reflection rate for the carrier wave from the vibration generator at a second end of the panel that is opposing to the first end across the vibration generator is greater than the first vibration reflection rate.