US 12,008,834 B2
Ultrasonic sensor device and method of controlling the same
Hiroshi Haga, Kanagawa (JP); Shin Takeuchi, Kanagawa (JP); Kenji Sera, Kanagawa (JP); Kenichi Hayashi, Kanagawa (JP); Feng Lu, Shanghai (CN); Haochi Yu, Shanghai (CN); and QiJun Yao, Shanghai (CN)
Assigned to SHANGHAI TIANMA MICRO-ELECTRONICS CO., LTD., Shanghai (CN)
Filed by Shanghai Tianma Micro-Electronics Co., Ltd., Shanghai (CN)
Filed on May 23, 2023, as Appl. No. 18/322,343.
Claims priority of application No. 2022-086116 (JP), filed on May 26, 2022.
Prior Publication US 2023/0386246 A1, Nov. 30, 2023
Int. Cl. G06V 40/13 (2022.01); G06V 40/12 (2022.01)
CPC G06V 40/1306 (2022.01) [G06V 40/1365 (2022.01)] 8 Claims
OG exemplary drawing
 
1. An ultrasonic sensor device comprising:
a plurality of pixels each including an ultrasonic transducer; and
a control circuit configured to control the plurality of pixels,
wherein 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, and
wherein 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.