US 12,422,408 B2
Method and system for calibrating ultrasonic sensor
Kee Yong Kim, Yongin-si (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Filed by Samsung Display Co., LTD., Yongin-si (KR)
Filed on Mar. 16, 2023, as Appl. No. 18/185,259.
Claims priority of application No. 10-2022-0043594 (KR), filed on Apr. 7, 2022.
Prior Publication US 2023/0324342 A1, Oct. 12, 2023
Int. Cl. G01N 29/06 (2006.01); G01N 29/12 (2006.01); G01N 29/44 (2006.01)
CPC G01N 29/0654 (2013.01) [G01N 29/12 (2013.01); G01N 29/4463 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for calibrating an ultrasonic sensor, the method comprising:
transmitting a first ultrasonic signal from the ultrasonic sensor toward a first surface of a contact device when a model is on the first surface of the contact device;
generating ultrasonic images by sampling a first ultrasonic echo signal, the first ultrasonic echo signal comprising a reflected signal of the first ultrasonic signal, at a plurality of reception time points;
detecting portions of the ultrasonic images, wherein detected portions of the ultrasonic images are most similar to corresponding portions of a reference image of the model when compared to other portions of the ultrasonic images having same positions as the detected portions and detected at different reception time points of the plurality of reception time points than the detected portions; and
storing the reception time points of the plurality of reception time points corresponding to the detected portions of the ultrasonic images.