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公开(公告)号：US20220333953A1
公开(公告)日：2022-10-20
申请号：US17713583
申请日：2022-04-05
申请人： TDK CORPORATION
发明人： Tsuyoshi UMEHARA , Hiraku HIRABAYASHI , Yongfu CAI
摘要： A magnetic sensor includes first to fourth resistors, a power supply port, a ground port, a first output port, and a second output port. The first resistor and the second resistor are located in a first region and connected in series via a first connection point connected to the first output port. The third resistor and the fourth resistor are located in a second region and connected in series via a second connection point connected to the second output port, at least a part of the second region being located at a position different from the first region in a direction parallel to an X direction. The first and second resistors are located between the third and fourth resistors in a direction parallel to a Y direction.
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公开(公告)号：US20220208627A1
公开(公告)日：2022-06-30
申请号：US17696253
申请日：2022-03-16
申请人： TDK Corporation
发明人： Yongfu CAI , Shuhei MIYAZAKI
摘要： In an assembly in which a space between two elements is filled with a filler containing resin, a configuration that can limit both the size of the assembly and the cost of the fillers is provided. An assembly of stacked elements has: first element having first surface; resin layer that is arranged on first surface and that contains a plurality of fillers; and second element that is arranged on resin layer and that has second surface that is in contact with resin layer. In a section that is perpendicular to second surface, the average flattening ratio of fillers that are in contact with second surface is larger than the average flattening ratio of fillers that are not in contact with second surface. Here, the flattening ratio is a ratio of the maximum length of the filler in a direction parallel to second surface to the maximum thickness of the filler in a direction perpendicular to second surface.
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公开(公告)号：US20210255000A1
公开(公告)日：2021-08-19
申请号：US17114664
申请日：2020-12-08
申请人： TDK CORPORATION
发明人： Yongfu CAI
摘要： A position detection device includes a magnetic field generator and a magnetic sensor. The magnetic field generator is configured so that a mode of variation of a direction of a target magnetic field relative to variations in a position of a lens is such that the direction of the target magnetic field varies nonlinearly relative to the variations in the position of the lens. The magnetic sensor is configured so that a mode of variation of a detection signal relative to variations in the direction of the target magnetic field is such that the detection signal varies nonlinearly relative to the variations in the direction of the target magnetic field.
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公开(公告)号：US20240133715A1
公开(公告)日：2024-04-25
申请号：US18404023
申请日：2024-01-04
申请人： TDK CORPORATION
发明人： Keisuke UCHIDA , Yongfu CAI
IPC分类号： G01D5/16
CPC分类号： G01D5/16
摘要： A position detection device includes a magnet that generates a magnetic field to be detected, and a magnetic sensor. The magnetic sensor detects the magnetic field to be detected and generates a detection value corresponding to the position of the magnet. The magnetic field to be detected has a first direction that changes within a first plane, at a reference position in the first plane. The magnetic sensor includes four MR elements. Each of the MR elements includes a first magnetic layer having first magnetization that can change in direction within a second plane corresponding to the each of the MR elements. The first plane and the second plane intersect at a dihedral angle α other than 90°. A detection value depends on the direction of the first magnetization.
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公开(公告)号：US20240068846A1
公开(公告)日：2024-02-29
申请号：US18446604
申请日：2023-08-09
申请人： TDK CORPORATION
发明人： Yongfu CAI
CPC分类号： G01D5/24428 , G01D5/245
摘要： A magnetic sensor includes a bridge circuit including a first arm and a second arm, a first substrate, and a second substrate. The first arm is provided on the first substrate. The second arm is provided on the second substrate. The first arm includes a first resistor and a second resistor connected in series. The second arm includes a third resistor and a fourth resistor connected in series. The second substrate is located at a position away from the first substrate so that a phase of a resistance of the second arm when a target magnetic field changes periodically is different from that of a resistance of the first arm when the target magnetic field change periodically.
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公开(公告)号：US20230251334A1
公开(公告)日：2023-08-10
申请号：US18299418
申请日：2023-04-12
申请人： TDK CORPORATION
发明人： Yongfu CAI , Toshihide SUTO
CPC分类号： G01R33/093 , G01R33/098 , G01R33/091 , G01R33/0029
摘要： A magnetism detection device according to an embodiment of the disclosure includes a sensor section and a resistive section. The sensor section includes a first magnetism detection element. The first magnetism detection element has a first stacked structure and is configured to detect a magnetic field to be detected. The resistive section includes a first resistive element and is coupled to the sensor section. The first resistive element has the first stacked structure.
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公开(公告)号：US20210382121A1
公开(公告)日：2021-12-09
申请号：US17409031
申请日：2021-08-23
申请人： TDK Corporation
发明人： Yongfu CAI
摘要： A magnetic sensor capable of reducing noise caused by an interference magnetic field and capable of outputting a highly accurate signal in accordance with changes in a detected magnetic field includes a magnetic detection element, a first magnetic body having a first surface and a second surface, which is opposite to the first surface, and a second magnetic body positioned approximately in the center of the first magnetic body in the short direction on the first surface of the first magnetic body. The magnetic detection element is provided to be opposite to the second magnetic body with the first magnetic body interposed in between and positioned approximately in the center of the first magnetic body in the short direction. The magnetic sensing direction of the magnetic detection element is a direction approximately parallel to the short direction of the first magnetic body and the second magnetic body, and a width W1 of the first magnetic body is larger than a width W2 of the second magnetic body.
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公开(公告)号：US20210231755A1
公开(公告)日：2021-07-29
申请号：US17227745
申请日：2021-04-12
申请人： TDK CORPORATION
发明人： Yongfu CAI , Toshihide SUTO
摘要： A magnetism detection device according to an embodiment of the disclosure includes a sensor section and a resistive section. The sensor section includes a first magnetism detection element. The first magnetism detection element has a first stacked structure and is configured to detect a magnetic field to be detected. The resistive section includes a first resistive element and is coupled to the sensor section. The first resistive element has the first stacked structure.
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公开(公告)号：US20200166590A1
公开(公告)日：2020-05-28
申请号：US16578490
申请日：2019-09-23
申请人： TDK Corporation
发明人： Yongfu CAI
摘要： A magnetic sensor device has a multipolar magnet having a first surface and a second surface, which is opposite to the first surface, in which magnetic poles of differing polarity are arranged alternately to divide the first surface radially into n regions (where n>4), and a magnetic detection part provided to be opposite to the first surface of the multipolar magnet. The multipolar magnet is provided to be capable of relative movement in at least one direction in a plane substantially parallel to the first surface and the second surface. The magnetic detection part outputs a signal corresponding to change in the magnetic field accompanying relative movement of the multipolar magnet, and the geometric centers of the multipolar magnet and the magnetic detection part substantially match in a direction orthogonal to the first surface.
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公开(公告)号：US20240230376A9
公开(公告)日：2024-07-11
申请号：US18404023
申请日：2024-01-04
申请人： TDK CORPORATION
发明人： Keisuke UCHIDA , Yongfu CAI
IPC分类号： G01D5/16
CPC分类号： G01D5/16
摘要： A position detection device includes a magnet that generates a magnetic field to be detected, and a magnetic sensor. The magnetic sensor detects the magnetic field to be detected and generates a detection value corresponding to the position of the magnet. The magnetic field to be detected has a first direction that changes within a first plane, at a reference position in the first plane. The magnetic sensor includes four MR elements. Each of the MR elements includes a first magnetic layer having first magnetization that can change in direction within a second plane corresponding to the each of the MR elements. The first plane and the second plane intersect at a dihedral angle α other than 90°. A detection value depends on the direction of the first magnetization.
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