公开(公告)号：US11940530B2

公开(公告)日：2024-03-26

申请号：US18150688

申请日：2023-01-05

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

Inventor： Lu Lian ,  Feng Lu ,  Haochi Yu

IPC: G06V40/13 ,  G01S7/539 ,  G01S15/89 ,  G06V10/98 ,  H01L29/786

CPC classification number: G01S15/8925 ,  G01S7/539 ,  G06V10/98 ,  G06V40/1306 ,  H01L29/78666 ,  H01L29/78675 ,  H01L29/7869 ,  H01L29/78696

Abstract: Provided are an ultrasonic fingerprint identification circuit, a driving method thereof, and a display device. The ultrasonic fingerprint identification circuit comprises fingerprint identification units each including an ultrasonic fingerprint identification sensor connected to a first node; a control module connected to a composite signal line, a first control signal line and the first node and configured to provide a reset potential to the first node and to provide a pull-up potential to the first node in response to a first level provided by the composite signal line; a reading module connected to a second control signal line, the first node and a reading signal line, and configured to read a detection signal of the first node. The first control signal line connected to one fingerprint identification unit is reused as the second control signal line connected to another fingerprint identification unit.

公开(公告)号：US11568669B2

公开(公告)日：2023-01-31

申请号：US17019821

申请日：2020-09-14

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

Inventor： Lu Lian ,  Feng Lu ,  Haochi Yu

IPC: G06V40/13 ,  G01S7/539 ,  G01S15/89 ,  G06V10/98 ,  H01L29/786

Abstract: Provided are an ultrasonic fingerprint identification circuit, a driving method thereof, and a display device. The ultrasonic fingerprint identification circuit comprises fingerprint identification units each including an ultrasonic fingerprint identification sensor connected to a first node; a control module connected to a composite signal line, a first control signal line and the first node and configured to provide a reset potential to the first node and to provide a pull-up potential to the first node in response to a first level provided by the composite signal line; a reading module connected to a second control signal line, the first node and a reading signal line, and configured to read a detection signal of the first node. The first control signal line connected to one fingerprint identification unit is reused as the second control signal line connected to another fingerprint identification unit.