公开(公告)号：US20210397813A1

公开(公告)日：2021-12-23

申请号：US17206123

申请日：2021-03-19

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Soon Gyu LEE ,  Jin A KANG ,  Mi Young KIM ,  Jin Woo KIM ,  Kyoung Hun BEEN ,  Byeong Kyu JEON

IPC: G06K9/00 ,  G06T5/00 ,  G06N20/00

Abstract: A fingerprint authentication device includes: a sensor unit configured to output a sensing signal by sensing a fingerprint; an image processing unit configured to generate a fingerprint image based on the sensing signal; a storage unit configured to store a template including an enrolled image; and a learning unit configured to generate a first pseudo image and add the first pseudo image to the template.

公开(公告)号：US20220012448A1

公开(公告)日：2022-01-13

申请号：US17367165

申请日：2021-07-02

Applicant: Samsung Display Co., Ltd.

Inventor： Kyoung Hun BEEN ,  Jin Woo KIM ,  Byeong Kyu JEON ,  Soon Gyu LEE

IPC: G06K9/00 ,  G01S15/89

Abstract: An ultrasonic fingerprint sensing method includes: generating a first ultrasonic wave using a first frequency; receiving a first signal generated by reflection of the first ultrasonic wave from each of a ridge and a valley of a fingerprint; generating a first image based on the first signal; comparing the first image with a registered reference image to generate a matching score; and in response to the matching score being less than a threshold value, generating a second image using a second frequency.

公开(公告)号：US20230077149A1

公开(公告)日：2023-03-09

申请号：US17824241

申请日：2022-05-25

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Mi Young KIM ,  Kyoung Hun BEEN ,  Byeong Kyu JEON

IPC: G01S7/52 ,  G06F21/32 ,  G06V40/13 ,  G06T7/00 ,  G01S15/89

Abstract: A method for calculating a reference value of an ultrasonic sensor includes: transmitting a first ultrasonic signal from the ultrasonic sensor toward a first surface of a contact device while an object is positioned on the first surface; generating a plurality of ultrasonic images based on a first ultrasonic echo signal; selecting an ultrasonic image having a highest similarity to a reference image from among the ultrasonic images; storing a first parameter and a second parameter corresponding to a selected ultrasonic image; while the object is not positioned on the first surface, transmitting a second ultrasonic signal based on the first parameter from the ultrasonic sensor toward the first surface; and calculating the reference value of the ultrasonic sensor using the second parameter and a second ultrasonic echo signal.