Patents by Inventor Tamon Kasajima

Tamon Kasajima has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220349960
    Abstract: To provide a small-sized magnetic sensor capable of achieving closed-loop control. A magnetic sensor includes: a sensor chip mounted on a surface of a substrate such that an element formation surface is perpendicular to the surface of the substrate or inclined by a predetermined angle with respect thereto; an external magnetic member mounted on the surface of the substrate and collecting a magnetic field to be detected in a magnetosensitive element; and a compensating coil wound around the external magnetic member. The compensating coil is thus wound around the external magnetic member, so that it is possible to cancel a magnetic field to be applied to the magnetosensitive element and to prevent the external magnetic member from being magnetically saturated.
    Type: Application
    Filed: July 30, 2020
    Publication date: November 3, 2022
    Inventors: Taiju AKUSHICHI, Makoto KAMENO, Tamon KASAJIMA
  • Patent number: 10905011
    Abstract: A state detecting device which can be applied even in a severe environment. The state detecting device includes a chargeable all-solid-state battery, a piezoelectric element which supplies charging power to the all-solid-state battery, and an integrated circuit including various sensors which operate with electric power supplied from the all-solid-state battery. The all-solid-state battery, the piezoelectric element, and the integrated circuit are mounted on one surface of a flexible substrate. The flexible substrate is attached to a flexible object which is either an object to be measured or constitutes at least part of an inner surface of a space to be measured.
    Type: Grant
    Filed: March 16, 2018
    Date of Patent: January 26, 2021
    Assignee: TDK Corporation
    Inventors: Masafumi Kami, Hiroshi Kobayashi, Tamon Kasajima
  • Publication number: 20200100363
    Abstract: A state detecting device which can be applied even in a severe environment. The state detecting device includes a chargeable all-solid-state battery, a piezoelectric element which supplies charging power to the all-solid-state battery, and an integrated circuit including various sensors which operate with electric power supplied from the all-solid-state battery. The all-solid-state battery, the piezoelectric element, and the integrated circuit are mounted on one surface of a flexible substrate. The flexible substrate is attached to a flexible object which is either an object to be measured or constitutes at least part of an inner surface of a space to be measured.
    Type: Application
    Filed: March 16, 2018
    Publication date: March 26, 2020
    Inventors: Masafumi KAMI, Hiroshi KOBAYASHI, Tamon KASAJIMA
  • Publication number: 20190113544
    Abstract: Disclosed herein is a magnetic sensor that includes a saturable magnetic member that receives magnetic flux flowing in a first axis direction, and a detection coil wound around the saturable magnetic member and having a coil axis aligned with a predetermine direction different from the first axis direction.
    Type: Application
    Filed: October 5, 2018
    Publication date: April 18, 2019
    Applicant: TDK CORPORATION
    Inventors: Takashi Osada, Takahiro Hamamura, Tamon Kasajima
  • Patent number: 10101413
    Abstract: A magnetic field detection device includes: a first magnetic field generating part, including a first magnetic field generating conductor; a first magnetic field detection part, including a first magnetic field detection element and a first differential operation part, wherein a first output of the first magnetic field detection element corresponding to the environment magnetic field is inputted into the first differential operation part, and a first feedback current flows into the first magnetic field generating conductor, and thus the first magnetic field generating part provides the first magnetic field detection element with a first feedback current magnetic field, with a direction opposite to the environment magnetic field; a second magnetic field generating part, including a second magnetic field generating conductor, in which a second current corresponding to the first feedback current flows; and a second magnetic field detection part, including a second magnetic field detection element.
    Type: Grant
    Filed: October 30, 2014
    Date of Patent: October 16, 2018
    Assignee: TDK CORPORATION
    Inventors: Tamon Kasajima, Kei Tanabe, Akihiro Ogawa
  • Patent number: 9983273
    Abstract: A magnetic field detecting sensor includes a bridge circuit which is connected to multiple magnetoresistive effect elements and is capable of outputting a differential voltage between specified connection points, a magnetic field generating conductor for providing the magnetoresistive effect elements with a magnetic field in a direction opposite to that of the detection magnetic field by disposing a magnetic body near the center of the bridge circuit, a differential operation circuit which the differential voltage is input in and makes a feedback current flow to the magnetic field generating conductor, wherein the feedback current generates the magnetic field in a direction opposite to that of the detection magnetic field in the magnetic field generating conductor, and a voltage converting circuit for outputting the feedback current as a voltage value. The magnetic field generating conductor and the magnetoresistive effect elements are formed in the same stacked body.
    Type: Grant
    Filed: May 14, 2015
    Date of Patent: May 29, 2018
    Assignee: TDK CORPORATION
    Inventors: Akihiro Ogawa, Tamon Kasajima, Kei Tanabe
  • Publication number: 20150331072
    Abstract: A magnetic field detecting sensor includes a bridge circuit which is connected to multiple magnetoresistive effect elements and is capable of outputting a differential voltage between specified connection points, a magnetic field generating conductor for providing the magnetoresistive effect elements with a magnetic field in a direction opposite to that of the detection magnetic field by disposing a magnetic body near the center of the bridge circuit, a differential operation circuit which the differential voltage is input in and makes a feedback current flow to the magnetic field generating conductor, wherein the feedback current generates the magnetic field in a direction opposite to that of the detection magnetic field in the magnetic field generating conductor, and a voltage converting circuit for outputting the feedback current as a voltage value. The magnetic field generating conductor and the magnetoresistive effect elements are formed in the same stacked body.
    Type: Application
    Filed: May 14, 2015
    Publication date: November 19, 2015
    Inventors: Akihiro OGAWA, Tamon KASAJIMA, Kei TANABE
  • Publication number: 20150115938
    Abstract: A magnetic field detection device includes: a first magnetic field generating part, including a first magnetic field generating conductor; a first magnetic field detection part, including a first magnetic field detection element and a first differential operation part, wherein a first output of the first magnetic field detection element corresponding to the environment magnetic field is inputted into the first differential operation part, and a first feedback current flows into the first magnetic field generating conductor, and thus the first magnetic field generating part provides the first magnetic field detection element with a first feedback current magnetic field, with a direction opposite to the environment magnetic field; a second magnetic field generating part, including a second magnetic field generating conductor, in which a second current corresponding to the first feedback current flows; and a second magnetic field detection part, including a second magnetic field detection element.
    Type: Application
    Filed: October 30, 2014
    Publication date: April 30, 2015
    Inventors: Tamon KASAJIMA, Kei TANABE, Akihiro OGAWA
  • Patent number: 8836317
    Abstract: A current sensor includes, a current-measured wiring including parallel wiring sections in which portions of the same wiring are arranged in parallel such that electric current to be measured flows therein in opposite directions each other; a magnetism detection unit which is arranged between parallel wirings located in the parallel wiring sections and detects a magnetic field in a direction perpendicular to a plane formed by the parallel wirings; a current detection unit which detects electric current flowing in the current-measured wiring, based on the magnetic field detected by the magnetism detection unit; and a magnetic core surrounding the parallel wiring sections so as to intensify the magnetic field generated around the parallel wirings located in the parallel wiring sections when electric current flows in the wirings.
    Type: Grant
    Filed: May 4, 2010
    Date of Patent: September 16, 2014
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventor: Tamon Kasajima
  • Patent number: 8735736
    Abstract: The electronic component module includes a substrate; an electronic component mounted on an electronic component mounting surface of the substrate; an insulating body that covers the electronic component on the electronic component mounting surface of the substrate; and a metal film formed by electroless plating, the metal film covering an exterior surface of the insulating body and a side surface of the substrate. The substrate has a space section in which a space is formed, the space being dented inward of the substrate in the periphery of a surface opposite to the electronic component mounting surface of the substrate, and the metal film entirely covers at least one side surface of the electronic component module except for at least a portion located on a surface perpendicular to the electronic component mounting surface of the substrate in the space section.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: May 27, 2014
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: Tamon Kasajima, Masashi Shiraishi
  • Publication number: 20130075143
    Abstract: The electronic component module includes a substrate; an electronic component mounted on an electronic component mounting surface of the substrate; an insulating body that covers the electronic component on the electronic component mounting surface of the substrate; and a metal film formed by electroless plating, the metal film covering an exterior surface of the insulating body and a side surface of the substrate. The substrate has a space section in which a space is formed, the space being dented inward of the substrate in the periphery of a surface opposite to the electronic component mounting surface of the substrate, and the metal film entirely covers at least one side surface of the electronic component module except for at least a portion located on a surface perpendicular to the electronic component mounting surface of the substrate in the space section.
    Type: Application
    Filed: October 21, 2011
    Publication date: March 28, 2013
    Inventors: Tamon KASAJIMA, Masashi Shiraishi
  • Patent number: 8193805
    Abstract: A magnetic sensor capable of detecting a magnetic field with high sensitivity is provided. The magnetic sensor includes a bridge circuit having a plurality of magneto resistive effect elements connected with each other, and is capable of detecting a differential voltage between predetermined connecting points. The magneto resistive effect elements output resistance values which vary in accordance with a direction of a magnetic field to be input, and are arranged such that fixed magnetization directions of all magneto resistive effect elements are in the same direction. Further, a magnetic body which changes the direction of the magnetic field to be input to the magneto resistive effect elements is also provided in the vicinity of the bridge circuit.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: June 5, 2012
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventor: Tamon Kasajima
  • Patent number: 7960970
    Abstract: A magnetic sensor having a reduced size and cost is provided. More particularly, the magnetic sensor includes a magnetic field detection chip having a magnetic field detection element for detecting a magnetic field and an output terminal for outputting an output signal from the magnetic field detection element. A substrate has the magnetic field detection chip mounted thereon, and has a connection terminal for being connected to the output terminal of the magnetic field detection chip that is formed on a mount face of the substrate. An output-terminal formed face of the magnetic field detection chip is arranged non-parallel to the mount face of the substrate. More specifically, the output-terminal formed face of the magnetic field detection chip is arranged almost vertical to the mount face of the substrate.
    Type: Grant
    Filed: August 7, 2008
    Date of Patent: June 14, 2011
    Assignees: SAE Magnetics (H.K.) Ltd., TDK Corporation
    Inventors: Tamon Kasajima, Shigeru Shoji
  • Patent number: 7956602
    Abstract: To provide a tilt angle sensor that is capable of detecting acceleration, a tilt angle, and the like of a device to which the tilt sensor angle is mounted, and also capable of reducing the size and the cost with a simple structure. The tilt angle sensor comprises: a spring member having a fixed end a free end that has a flexibility to be bent at least in one direction; a magnetic field generating device for generating a magnetic field, which is mounted at the free end of the spring member; a magnetic field detecting device provided by facing the magnetic field generating device for detecting a direction of the magnetic field generated by the magnetic field generating device; and a damping device for giving a damping force to a bending action of the spring member.
    Type: Grant
    Filed: April 2, 2008
    Date of Patent: June 7, 2011
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: Tamon Kasajima, Hiroyoshi Nakajima, Yong Jun Dong, Fu Yu
  • Publication number: 20100301835
    Abstract: A current sensor includes, a current-measured wiring including parallel wiring sections in which portions of the same wiring are arranged in parallel such that electric current to be measured flows therein in opposite directions each other; a magnetism detection unit which is arranged between parallel wirings located in the parallel wiring sections and detects a magnetic field in a direction perpendicular to a plane formed by the parallel wirings; a current detection unit which detects electric current flowing in the current-measured wiring, based on the magnetic field detected by the magnetism detection unit; and a magnetic core surrounding the parallel wiring sections so as to intensify the magnetic field generated around the parallel wirings located in the parallel wiring sections when electric current flows in the wirings.
    Type: Application
    Filed: May 4, 2010
    Publication date: December 2, 2010
    Applicant: SAE Magnetics (H.K.) Ltd.
    Inventor: Tamon Kasajima
  • Patent number: 7621185
    Abstract: There is provided an acceleration sensor that is capable of detecting acceleration with high precision and capable of reducing the size and cost due to its simple structure. The acceleration sensor comprises: a pair of cantilevers arranged on a same straight line or almost in parallel in such a manner that positions of fixed ends and free ends are arranged to face in opposite directions from each other, and each of the free ends has a degree of freedom to deflect along a same direction; a pair of magnetic field generating devices mounted respectively to each of the free ends for generating magnetic fields; and a pair of magnetic field detecting devices arranged to face each of the magnetic field generating devices, respectively, for detecting directions of the magnetic fields generated by each of the magnetic field generating devices.
    Type: Grant
    Filed: July 26, 2006
    Date of Patent: November 24, 2009
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventor: Tamon Kasajima
  • Publication number: 20090284254
    Abstract: A magnetic sensor capable of detecting a magnetic field with high sensitivity is provided. The magnetic sensor includes a bridge circuit having a plurality of magneto resistive effect elements connected with each other, and is capable of detecting a differential voltage between predetermined connecting points. The magneto resistive effect elements output resistance values which vary in accordance with a direction of a magnetic field to be input, and are arranged such that fixed magnetization directions of all magneto resistive effect elements are in the same direction. Further, a magnetic body which changes the direction of the magnetic field to be input to the magneto resistive effect elements is also provided in the vicinity of the bridge circuit.
    Type: Application
    Filed: April 30, 2009
    Publication date: November 19, 2009
    Applicant: SAE Magnetics (H.K.) Ltd.
    Inventor: Tamon Kasajima
  • Publication number: 20090195243
    Abstract: To provide a tilt angle sensor that is capable of detecting acceleration, a tilt angle, and the like of a device to which the tilt sensor angle is mounted, and also capable of reducing the size and the cost with a simple structure. The tilt angle sensor comprises: a spring member having a fixed end a free end that has a flexibility to be bent at least in one direction; a magnetic field generating device for generating a magnetic field, which is mounted at the free end of the spring member; a magnetic field detecting device provided by facing the magnetic field generating device for detecting a direction of the magnetic field generated by the magnetic field generating device; and a damping device for giving a damping force to a bending action of the spring member.
    Type: Application
    Filed: April 2, 2008
    Publication date: August 6, 2009
    Applicant: SAE MAGNETICS (H.K) LTD.
    Inventors: Tamon KASAJIMA, Hiroyoshi NAKAJIMA, Yong Jun DONG, Fu YU
  • Patent number: 7555947
    Abstract: An air pressure sensor capable of measuring air pressure highly accurately with a simple configuration is provided. The sensor includes: a sealed case with a sealed space formed therein; a first thin plate member which constitutes at least a part of the wall of the sealed case and deforms to allow the capacity of the sealed space to vary corresponding to changes in the outside air pressure; a first PZT which contacts the first thin plate member to thereby detect the natural frequency thereof; and a second thin plate member which has the same vibration characteristics as those of the first thin plate member and is provided outside the sealed case while contacting it; and a second PZT which has the same temperature characteristics as those of the first PZT and contacts the second thin plate member to thereby detect the natural frequency thereof.
    Type: Grant
    Filed: September 14, 2007
    Date of Patent: July 7, 2009
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventor: Tamon Kasajima
  • Publication number: 20090045809
    Abstract: To provide a magnetic sensor that can be reduced in size and cost. Provided is a magnetic sensor which comprises: a magnetic field detection chip having a magnetic field detection element for detecting a magnetic field and an output terminal for outputting an output signal from the magnetic field detection element; and a substrate that has the magnetic field detection chip mounted thereon, and has a connection terminal for being connected to the output terminal of the magnetic field detection chip that is formed on a mount face of the substrate. An output-terminal formed face of the magnetic field detection chip is arranged not to be in parallel to the mount face of the substrate. More specifically, the output-terminal formed face of the magnetic field detection chip is arranged almost vertical to the mount face of the substrate.
    Type: Application
    Filed: August 7, 2008
    Publication date: February 19, 2009
    Applicants: SAE MAGNETICS (H.K.) LTD., TDK CORPORATION
    Inventors: Tamon Kasajima, Shigeru Shoji