Patents by Inventor Terumasa Toyoda
Terumasa Toyoda 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).
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Publication number: 20220344086Abstract: An element body 4 includes a metal particle dispersion element 15 in which metal particles 12 are dispersed. A surface of the metal particle dispersion element 15 includes an indicator area 10. The indicator area 10 includes a recess 10a having a predetermined depth measured from a reference plane L of the metal particle dispersion element 15. The predetermined depth D1 is deeper than D50 of the metal particles 12 included in the metal particle dispersion element 15.Type: ApplicationFiled: April 19, 2022Publication date: October 27, 2022Applicant: TDK CORPORATIONInventors: Kyosuke INUI, Terumasa TOYODA, Toru TONOGAI, Yuichi OYANAGI
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Patent number: 11367556Abstract: An inductor has a coil portion made of a wire wound in a coil shape and an element body in which the coil portion is provided. The element body has a first core member, a second core member, and a third core member. The first core member has a winding core portion configured to be positioned inside the coil portion. The second core member is accommodated in the winding core portion. The third core member covers the coil portion and the first core member in which the second core member is accommodated in the winding core portion.Type: GrantFiled: March 6, 2019Date of Patent: June 21, 2022Assignee: TDK CORPORATIONInventors: Toru Tonogai, Atsuyuki Nakano, Terumasa Toyoda, Yuichi Oyanagi
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Publication number: 20220059281Abstract: Disclosed herein is a coil component that includes a plate-like base member, a magnetic core mounted on the base member, a wire wound around the magnetic core such that an axis direction thereof is substantially parallel to the base member, and a terminal electrode fixed to the base member and connected to an end portion of the wire. The base member is made of a material having a permeability lower than that of the magnetic core.Type: ApplicationFiled: August 11, 2021Publication date: February 24, 2022Applicant: TDK CORPORATIONInventors: Terumasa TOYODA, Hiroshi SUZUKI, Toru TONOGAI, Keigo HIGASHIDA, Hanako YOSHINO
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Publication number: 20220059280Abstract: Disclosed herein is a coil component that is surface-mountable on a substrate. The coil component includes a magnetic core, a wire wound around the magnetic core such that the coil axis direction is substantially parallel to the substrate, a terminal electrode connected to an end of the wire, and a low permeability part provided between the magnetic core and the terminal electrode. The low permeability part has a permeability lower than that of the magnetic core.Type: ApplicationFiled: August 11, 2021Publication date: February 24, 2022Applicant: TDK CORPORATIONInventors: Keigo Higashida, Hiroshi Suzuki, Terumasa Toyoda, Hanako Yoshino
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Publication number: 20190304659Abstract: An inductor has a coil portion made of a wire wound in a coil shape and an element body in which the coil portion is provided. The element body has a first core member, a second core member, and a third core member. The first core member has a winding core portion configured to be positioned inside the coil portion. The second core member is accommodated in the winding core portion. The third core member covers the coil portion and the first core member in which the second core member is accommodated in the winding core portion.Type: ApplicationFiled: March 6, 2019Publication date: October 3, 2019Applicant: TDK CORPORATIONInventors: Toru TONOGAI, Atsuyuki NAKANO, Terumasa TOYODA, Yuichi OYANAGI
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Patent number: 8791786Abstract: A coil device 10 comprises a first bobbin 40 having a first bobbin plate 42 provided with a first hollow cylinder 44 on which a primary coil 20 is wound at the outer periphery, and a second bobbin 50 mounted on the first bobbin 40 and having a second bobbin plate 52 provided with a second hollow cylinder 54 on which a secondary coil 30 is wound at the outer periphery. A winding center C1 of the primary coil 20 and a winding center C2 of the secondary coil 30 displace with a predetermined displacement (Lx) along a predetermined reference direction X.Type: GrantFiled: October 4, 2012Date of Patent: July 29, 2014Assignees: TDK Corporation, TDK Korea CorporationInventors: Hiroshi Maeda, Terumasa Toyoda, Kiho Hwang, Sukho Shin
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Publication number: 20110187485Abstract: A transformer includes a bobbin, terminal electrodes, a core, a primary winding, a secondary winding, and an additional winding. The bobbin is made from an electrically insulating material and has a tubular portion defining an internal space. The tubular portion has an outer peripheral surface providing a first through third sections arrayed side by side in an axial direction of the tubular portion. The terminal electrodes are provided at the bobbin for electrical connection to the windings. The core is inserted into the internal space. The primary winding has an insulating layer and is wound over the first section. The secondary winding has an insulating layer and is wound over the third section. The additional winding is wound over the second section and has an insulation layer whose insulating performance is greater than that of the insulation layer of the primary winding and the secondary winding.Type: ApplicationFiled: January 28, 2011Publication date: August 4, 2011Applicant: TDK CORPORATIONInventors: Terumasa TOYODA, Hiroshi MAEDA, Toru HONMA, Nobuo KITAJIMA, Kazunori ISHIBASHI
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Patent number: 7224129Abstract: Discharge lamps are respectively aligned and arranged, and a first alternating voltage output from an inverter circuit is supplied to one electrode of each discharge lamp, whilst a second alternating voltage output from the inverter circuit is supplied to the other electrode of the same. A signal processor compares a first voltage signal with a second voltage signal, and generates a current-limit signal when a difference in amplitude between these signals is not smaller than a predetermined value. The current-limit signal is supplied to the inverter circuit to help reduce the chance on an accidental electric shock.Type: GrantFiled: October 27, 2005Date of Patent: May 29, 2007Assignee: TDK CorporationInventors: Hiroshi Maeda, Katsunori Imai, Terumasa Toyoda
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Patent number: 7205726Abstract: There are provided a discharge lamp drive apparatus which can detect that both ends of at least one of a plurality of discharge lamps is in an open state in a differential drive scheme, and a liquid crystal display apparatus. A first current detection circuit 31 detects a current flowing through a first discharge lamp connection terminal group P1 or a current flowing through a second discharge lamp connection terminal group P3, and generates a first current detection signal S1. A second current detection circuit 32 detects a current flowing through the second discharge lamp connection terminal group P2 or a current flowing through a fourth discharge lamp connection terminal group P4, and generates a second current detection signal S2. A signal processor 30 receives the first current detection signal S1 and the second current detection signal S2, and generates a signal S01 which is used to detect an open state of a discharge lamp based on intensities of both the current detection signals S1 and S2.Type: GrantFiled: October 27, 2005Date of Patent: April 17, 2007Assignee: TDK CorporationInventors: Hiroshi Maeda, Satoshi Shinbo, Masahiro Gamou, Satoshi Sugimoto, Nobuo Kitajima, Terumasa Toyoda
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Publication number: 20060108947Abstract: The present invention is directed to a discharge lamp drive apparatus capable of avoiding an electric shock accident. Discharge lamps are respectively aligned and arranged, and a first alternating voltage output from an inverter circuit is supplied to one electrode of each discharge lamp, whilst a second alternating voltage output from the inverter circuit is supplied to the other electrode of the same. A signal processor compares a first voltage signal with a second voltage signal, and generates a current-limit signal when a difference in amplitude between these signals is not smaller than a predetermined value. The current-limit signal is supplied to the inverter circuit.Type: ApplicationFiled: October 27, 2005Publication date: May 25, 2006Applicant: TDK CORPORATIONInventors: Hiroshi Maeda, Katsunori Imai, Terumasa Toyoda
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Publication number: 20060103329Abstract: There are provided a discharge lamp drive apparatus which can detect that both ends of at least one of a plurality of discharge lamps is in an open state in a differential drive scheme, and a liquid crystal display apparatus. A first current detection circuit 31 detects a current flowing through a first discharge lamp connection terminal group P1 or a current flowing through a second discharge lamp connection terminal group P3, and generates a first current detection signal S1. A second current detection circuit 32 detects a current flowing through the second discharge lamp connection terminal group P2 or a current flowing through a fourth discharge lamp connection terminal group P4, and generates a second current detection signal S2. A signal processor 30 receives the first current detection signal S1 and the second current detection signal S2, and generates a signal S01 which is used to detect an open state of a discharge lamp based on intensities of both the current detection signals S1 and S2.Type: ApplicationFiled: October 27, 2005Publication date: May 18, 2006Applicant: TDK CORPORATIONInventors: Hiroshi Maeda, Satoshi Shinbo, Masahiro Gamou, Satoshi Sugimoto, Nobuo Kitajima, Terumasa Toyoda