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公开(公告)号：US20170315159A1
公开(公告)日：2017-11-02
申请号：US15654341
申请日：2017-07-19
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Keiichi ICHIKAWA , Tsuyoshi SUESADA
Abstract: A voltage detection circuit includes an inductor connected to connection portions configured to input an alternating-current voltage, an inductor magnetic-field coupled to the inductor, a capacitor connected in parallel to the inductor and constituting a secondary-side resonant circuit with the inductor, and a voltage detector configured to detect an output voltage from the secondary-side resonant circuit. Therefore, a voltage detection circuit, a power transmission device, and a power transmission system capable of detecting an alternating-current voltage with high detection sensitivity irrespective of the potential of a power transmission line are provided.
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公开(公告)号：US20230247765A1
公开(公告)日：2023-08-03
申请号：US18128263
申请日：2023-03-30
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Keiichi ICHIKAWA
CPC classification number: H05K1/144 , H01Q1/2283 , H01Q21/06 , H01Q9/0407 , H05K2201/042 , H05K2201/10098 , H01L2224/16227 , H01L24/16
Abstract: A first board body includes a first board body upper main surface and a first board body lower main surface that are arranged in a vertical direction. A second board body includes a second board body upper main surface and a second board body lower main surface that are arranged in the vertical direction. The second board body is above the first board body such that the first board body upper main surface and the second board body lower main surface face each other. A semiconductor element is mounted on the first board body lower main surface. An antenna is provided on the second board body. A thickness of a metal plate is larger than a thickness of a first conductor pattern. The metal plate is surface-joined to the first board body upper main surface to overlap the semiconductor element.
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3.发明申请公开(公告)号：US20160372259A1
公开(公告)日：2016-12-22
申请号：US15255965
申请日：2016-09-02
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Shinichiro BANBA , Tsuneo MURATA , Norio SAKAI , Yoshihito OTSUBO , Keiichi ICHIKAWA
IPC: H01F27/29 , H01F27/255 , H01F41/02 , H01F27/28
CPC classification number: H01F27/29 , H01F17/062 , H01F27/255 , H01F27/2823 , H01F41/02 , H01F41/04 , H01F41/08
Abstract: A coil component that includes a coil having a thick coil core and good inductance characteristics and is able to narrow the pitch of a coil electrode is provided. The wiring of a coil electrode in a direction across the direction of a winding axis of the coil electrode includes a plurality of first metal pins and a plurality of second metal pins. By elongating each metal pin, the wiring of the coil electrode is easily elongated in a metal pin direction. Thus, a coil core is easily thickened in the metal pin direction. The wiring of the coil electrode can be formed in the metal pin direction only by arranging the metal pins. Thus, it is possible to provide a coil component that includes a coil having the thick coil core and good inductance characteristics and is able to narrow the pitch of the coil electrode.
Abstract translation: 提供一种线圈部件，其包括具有厚的线圈芯线和良好的电感特性并且能够使线圈电极的间距变窄的线圈。 线圈电极沿着线圈电极的卷绕轴线方向的布线包括多个第一金属销和多个第二金属销。 通过延长每个金属销，线圈电极的布线容易在金属销方向上伸长。 因此，线圈芯在金属销方向上容易增厚。 线圈电极的布线只能通过布置金属销而形成在金属销方向上。 因此，可以提供包括具有厚线圈芯线圈和良好的电感特性的线圈的线圈部件，并且能够使线圈电极的间距变窄。
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公开(公告)号：US20140253052A1
公开(公告)日：2014-09-11
申请号：US14282566
申请日：2014-05-20
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Sinji GOMA , Keiichi ICHIKAWA , Tsuyoshi SUESADA
IPC: H02J7/00
Abstract: Power transmission device that causes a power supply circuit to supply a first voltage to a first active electrode when power transmission is performed, causes the power supply circuit to supply a second voltage that is lower than the first voltage to the first active electrode and causes power reception device detection means to perform frequency sweeping at a first time interval until the power reception device is mounted, or causes the power supply circuit to supply a third voltage that is lower than the first voltage to the first active electrode and causes the power reception device detection means to perform frequency sweeping at a second time interval that is longer than the first time interval until the power reception device is removed.
Abstract translation: 电力传输装置，其在电力传输进行时使电源电路向第一有效电极供给第一电压，使得电源电路向第一有源电极提供低于第一电压的第二电压，并使电力 接收装置检测装置，用于以第一时间间隔执行频率扫描，直到安装电力接收装置，或者使电源电路向第一有效电极提供低于第一电压的第三电压，并且使得电力接收装置 检测装置，其以比第一时间间隔长的第二时间间隔执行频率扫描，直到电力接收装置被去除。
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公开(公告)号：US20250010577A1
公开(公告)日：2025-01-09
申请号：US18888325
申请日：2024-09-18
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Nobuo IKEMOTO , Keiichi ICHIKAWA , Kentarou KAWABE
Abstract: In a multilayer substrate, a second multilayer body is positioned in a positive direction of a Z-axis of a first multilayer body. The second multilayer body is fixed to the first multilayer body via a first insulator layer bonded to a second insulator layer. Regions obtained by dividing the first multilayer body into three equal portions in the Z-axis direction are defined as a positive region, an intermediate region, and a negative region. A portion of one or more positive region first conductor layers is located in the positive region. An entirety of one or more intermediate region first conductor layers is located in the intermediate region. A thickness in the Z-axis direction of at least one of the one or more positive region first conductor layers is larger than the thickness in the Z-axis direction of the one or more intermediate region first conductor layers.
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Patent Agency Ranking
公开(公告)号：US20190393604A1
公开(公告)日：2019-12-26
申请号：US16553399
申请日：2019-08-28
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Keiichi ICHIKAWA
Abstract: An antenna device includes a first inductor that is electrically connected to a first system circuit. A second inductor is connected to the first inductor. The first inductor and the second inductor are connected in series with a second system circuit. The second inductor and a parallel resonant circuit are connected to the first system circuit in parallel with the first inductor. The parallel resonant circuit resonates at a parallel resonant frequency lower than a first communication frequency of the first system circuit.
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公开(公告)号：US20190386389A1
公开(公告)日：2019-12-19
申请号：US16553404
申请日：2019-08-28
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Keiichi ICHIKAWA
Abstract: An antenna device includes a first and second coil conductors. The second coil conductor includes a first conductor portion and a second conductor portion. The first conductor portion is provided in an outer side portion relative to an outer circumference of the first coil conductor when viewed from a winding axis direction of the first coil conductor and surrounds a formation region of the first coil conductor. The second conductor portion is connected to the first conductor portion and includes a second aperture, at least a portion thereof is disposed in an outer side portion relative to the outermost circumference of the first coil conductor, and at least a portion of the second aperture is disposed in an outer side portion relative to the formation region of the first coil conductor. The second conductor portion includes a portion farther from the first coil conductor than the first conductor portion.
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公开(公告)号：US20190385787A1
公开(公告)日：2019-12-19
申请号：US16553431
申请日：2019-08-28
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Keiichi ICHIKAWA
Abstract: An antenna device includes a base, a coil conductor, and a heat dissipation conductor. The coil conductor is provided on the base and wound in a spiral shape. The heat dissipation conductor is connected to the coil conductor. The heat dissipation conductor includes a connection end and an open end. The connection end is connected to the coil conductor. The open end is an end different from the connection end.
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公开(公告)号：US20240047865A1
公开(公告)日：2024-02-08
申请号：US18381671
申请日：2023-10-19
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Nobuo IKEMOTO , Kosuke NISHIO , Kaoru SUDO , Keiichi ICHIKAWA , Nobuyuki TENNO
IPC: H01Q1/38
CPC classification number: H01Q1/38
Abstract: An antenna element includes a first opening including an annular outer boundary in an antenna conductor layer. A first insulative substrate non-forming region is provided between an insulative substrate and the antenna conductor layer in an up-down direction. The insulative substrate does not exist in the first insulative substrate non-forming region. The outer boundary of the first opening overlaps one or more first insulative substrate non-forming regions and is not in contact with the insulative substrate. The first insulative substrate non-forming region is a first void, and a low dielectric constant material having a lower dielectric constant than that of a material of the insulative substrate or a high dielectric constant material having a higher dielectric constant than that of the material of the insulative substrate is provided in the first insulative substrate non-forming region.
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10.发明申请公开(公告)号：US20180017599A1
公开(公告)日：2018-01-18
申请号：US15715402
申请日：2017-09-26
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Keiichi ICHIKAWA
CPC classification number: G01R15/18 , G01N27/04 , H01F27/2804 , H01F27/362 , H01F38/30 , H01F2027/2809 , H02J7/025 , H02J50/12
Abstract: A current detection element includes a laminate where multiple insulator layers are laminated, a main line conductor formed in the laminate, extending in one direction, a coil-shaped current detection conductor that is formed in the laminate and that is magnetically coupled with the main line conductor, and electrostatic shielding conductors that are formed in the laminate, and that are grounded. The electrostatic shielding conductors overlap at least one of the main line conductor and the current detection conductor in plan view from a winding axis direction along a winding axis of the current detection conductor. Accordingly, a current detection element that accurately detects high-frequency AC current flowing through a line, and a transmission device and electric power transmission system having the same, are provided.
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