公开(公告)号：JP2002008022A

公开(公告)日：2002-01-11

申请号：JP2001105676

申请日：2001-04-04

Applicant: ST MICROELECTRONICS INC

Inventor： SABATINI MARCO ,  RAYNAL FREDERIC ,  GOZZINI GIOVANNI

IPC: A61B5/117 ,  G06K9/00 ,  G06T1/00 ,  H03K17/96

Abstract: PROBLEM TO BE SOLVED: To provide a technology capable of precisely capturing a fingerprint image. SOLUTION: This fingerprint sensor has an array consisting on a plurality of capacitive pixels. Each of the capacitive pixels has a pair of plates and a reset transistor. The reset transistor has a gate, a source connected one of the metal plates, and a drain connected to the other of the metal plates. A reset buffer generates a reset signal. A regenerator is related to each reset transistor of each capacitive pixel. The regenerator regenerates the reset signal received from the reset buffer to remove the injection gradient over the array.

公开(公告)号：JP2001307078A

公开(公告)日：2001-11-02

申请号：JP2001091575

申请日：2001-03-28

Applicant: ST MICROELECTRONICS INC

Inventor： RAYNAL FREDERIC ,  FABRIZZIO VITO

IPC: A61B5/117 ,  G06K9/00 ,  G06T1/00 ,  G07C9/00

Abstract: PROBLEM TO BE SOLVED: To provide a small-sized and inexpensive fingerprint sensor. SOLUTION: This fingerprint sensing system is provided with an array composed of capacitive sensing elements and the array is provided with a first dimension which is almost the width of a fingerprint and a second dimension shorter than the length of the fingerprint. A scanning control unit is connected so as to scan the array at a scanning speed decided by the moving speed of a finger on the array and the scanning control unit scans the array and captures a partial fingerprint image. Output logic is connected to the array so as to assemble the captured fingerprint image to a complete fingerprint image based on the moving direction of the finger on the array. A mouse device is positioned adjacently to the array within the moving route of the finger on the array.

公开(公告)号：DE60108678T2

公开(公告)日：2006-04-13

申请号：DE60108678

申请日：2001-04-02

Applicant: ST MICROELECTRONICS INC

Inventor： SABATINI MARCO ,  RAYNAL FREDERIC ,  GOZZINI GIOVANNI

IPC: A61B5/117 ,  G06K9/00 ,  G06T1/00 ,  H03K17/96

Abstract: A fingerprint sensor includes an array comprising a plurality of capacitive pixel cells. Each of the capacitive pixel cells includes a pair of metal plates and a reset transistor. The reset transistor includes a gate, a source connected to one of the metal plates and a drain connected to the other of the metal plates. A reset buffer generates a reset signal. A regenerator is associated with each reset transistor of each capacitive pixel cell. The regenerator regenerates the reset signal received from the reset buffer to eliminate injection gradient over the array.

公开(公告)号：DE60108678D1

公开(公告)日：2005-03-10

申请号：DE60108678

申请日：2001-04-02

Applicant: ST MICROELECTRONICS INC

Inventor： SABATINI MARCO ,  RAYNAL FREDERIC ,  GOZZINI GIOVANNI

IPC: A61B5/117 ,  G06K9/00 ,  G06T1/00 ,  H03K17/96

Abstract: A fingerprint sensor includes an array comprising a plurality of capacitive pixel cells. Each of the capacitive pixel cells includes a pair of metal plates and a reset transistor. The reset transistor includes a gate, a source connected to one of the metal plates and a drain connected to the other of the metal plates. A reset buffer generates a reset signal. A regenerator is associated with each reset transistor of each capacitive pixel cell. The regenerator regenerates the reset signal received from the reset buffer to eliminate injection gradient over the array.