Patents by Inventor Koichiro Miyamoto
Koichiro Miyamoto 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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Patent number: 11966176Abstract: A transfer member includes: an inner layer; and an outer layer that is adhered to the inner layer and has a hardness lower than a hardness of the inner layer.Type: GrantFiled: November 18, 2021Date of Patent: April 23, 2024Assignee: FUJIFILM Business Innovation Corp.Inventors: Hirotaka Tanaka, Tomoaki Yoshioka, Yoko Miyamoto, Toshiaki Baba, Koichiro Yuasa, Kazuyoshi Hagiwara, Kei Tanaka
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Patent number: 11776573Abstract: According to an embodiment, a magnetic disk device includes a magnetic disk, a spindle motor that rotates the magnetic disk, a motor driver, and a controller. The motor driver supplies a motor current to the spindle motor and measures a counter electromotive voltage of the spindle motor every time the spindle motor makes one rotation. After the rotation of the magnetic disk starts, the controller adjusts a motor position where the counter electromotive voltage is measured to a set first position.Type: GrantFiled: March 10, 2021Date of Patent: October 3, 2023Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage CorporationInventors: Yu Chen, Kenichiro Ozeki, Koichiro Miyamoto
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Publication number: 20230282236Abstract: According to one embodiment, a magnetic disk device includes a magnetic disk, a magnetic head, an actuator, a controller, and a ramp. The magnetic head is configured to record data on and reproduce data from the magnetic disk. The actuator is configured to move the magnetic head relative to the magnetic disk. The controller is configured to control the actuator. The ramp is configured to hold the magnetic head. The controller is configured to, in a retract operation for causing the actuator to retract the magnetic head to the ramp, alternate detection of a back electromotive force of the actuator and application of a voltage corresponding to the back electromotive force to the actuator, and skip the detection of the back electromotive force a predetermined number of times in response to an event that the magnetic head moves at a speed outside a predetermined range.Type: ApplicationFiled: September 12, 2022Publication date: September 7, 2023Inventors: Koichiro MIYAMOTO, Kenichiro OOZEKI, Yu CHEN
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Patent number: 11521646Abstract: According to one embodiment, there is provided a hard disk drive including a first recording surface, a second recording surface, a first magnetic head, a first actuator and a second actuator that move the first magnetic head, a second magnetic head, a third actuator and a fourth actuator that move the second magnetic head, a fifth actuator that moves the second actuator and the fourth actuator, a drive circuit that implements at least one of a first mode in which the second actuator and the fourth actuator operate differently from each other or a second mode in which the first and third actuators operate differently from each other, and a controller that controls the drive circuit.Type: GrantFiled: April 7, 2021Date of Patent: December 6, 2022Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATIONInventors: Koichiro Miyamoto, Kenichiro Oozeki, Yu Chen
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Patent number: 11355152Abstract: According to one embodiment, a disk device includes a recording medium, a suspension, a magnetic head, an actuator, a circuit board, an FPC, a preamplifier, and an actuator driver. The magnetic head and the actuator are mounted on the suspension. The circuit board includes a control circuit. The FPC is connected to the suspension and the circuit board. The preamplifier is mounted on the FPC, outputs a write signal, to the magnetic head, corresponding to information to be written to the recording medium by the magnetic head, and receives, from the magnetic head, a read signal corresponding to information read from the recording medium by the magnetic head. The actuator driver is mounted apart from the preamplifier on the FPC, the actuator driver that outputs a drive signal for driving the actuator to the actuator.Type: GrantFiled: March 8, 2021Date of Patent: June 7, 2022Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATIONInventors: Kenichiro Ozeki, Yu Chen, Koichiro Miyamoto
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Publication number: 20220167991Abstract: An anchor device configured to connect a plurality of tissues to each other, includes a shaft having a longitudinal axis; and a first anchor part and a second anchor part which are separated from each other and which are each formed in the shaft. The first anchor part includes a plurality of elongated anchor arms that are allowed to be expanded in a direction of separating from the longitudinal axis of the shaft toward the second anchor part with a first position of the shaft being a base point. The second anchor part includes a plurality of elongated anchor arms that are allowed to be expanded in a direction of separating from the longitudinal axis of the shaft toward the first anchor part with a second position of the shaft being a base point.Type: ApplicationFiled: March 19, 2020Publication date: June 2, 2022Inventors: Koichiro MIYAMOTO, Toru OKUZONO
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Publication number: 20220084555Abstract: According to one embodiment, a disk device includes a recording medium, a suspension, a magnetic head, an actuator, a circuit board, an FPC, a preamplifier, and an actuator driver. The magnetic head and the actuator are mounted on the suspension. The circuit board includes a control circuit. The FPC is connected to the suspension and the circuit board. The preamplifier is mounted on the FPC, outputs a write signal, to the magnetic head, corresponding to information to be written to the recording medium by the magnetic head, and receives, from the magnetic head, a read signal corresponding to information read from the recording medium by the magnetic head. The actuator driver is mounted apart from the preamplifier on the FPC, the actuator driver that outputs a drive signal for driving the actuator to the actuator.Type: ApplicationFiled: March 8, 2021Publication date: March 17, 2022Inventors: Kenichiro OZEKI, Yu CHEN, Koichiro MIYAMOTO
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Publication number: 20210383833Abstract: According to an embodiment, a magnetic disk device includes a magnetic disk, a spindle motor that rotates the magnetic disk, a motor driver, and a controller. The motor driver supplies a motor current to the spindle motor and measures a counter electromotive voltage of the spindle motor every time the spindle motor makes one rotation. After the rotation of the magnetic disk starts, the controller adjusts a motor position where the counter electromotive voltage is measured to a set first position.Type: ApplicationFiled: March 10, 2021Publication date: December 9, 2021Inventors: Yu Chen, Kenichiro Ozeki, Koichiro Miyamoto
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Publication number: 20210256997Abstract: According to one embodiment, there is provided a hard disk drive including a first recording surface, a second recording surface, a first magnetic head, a first actuator and a second actuator that move the first magnetic head, a second magnetic head, a third actuator and a fourth actuator that move the second magnetic head, a fifth actuator that moves the second actuator and the fourth actuator, a drive circuit that implements at least one of a first mode in which the second actuator and the fourth actuator operate differently from each other or a second mode in which the first and third actuators operate differently from each other, and a controller that controls the drive circuit.Type: ApplicationFiled: April 7, 2021Publication date: August 19, 2021Inventors: Koichiro Miyamoto, Kenichiro Oozeki, Yu Chen
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Patent number: 10984827Abstract: According to one embodiment, there is provided a hard disk drive including a first recording surface, a second recording surface, a first magnetic head, a first actuator and a second actuator that move the first magnetic head, a second magnetic head, a third actuator and a fourth actuator that move the second magnetic head, a fifth actuator that moves the second actuator and the fourth actuator, a drive circuit that implements at least one of a first mode in which the second actuator and the fourth actuator operate differently from each other or a second mode in which the first and third actuators operate differently from each other, and a controller that controls the drive circuit.Type: GrantFiled: February 21, 2020Date of Patent: April 20, 2021Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage CorporationInventors: Koichiro Miyamoto, Kenichiro Oozeki, Yu Chen
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Publication number: 20210012796Abstract: According to one embodiment, there is provided a hard disk drive including a first recording surface, a second recording surface, a first magnetic head, a first actuator and a second actuator that move the first magnetic head, a second magnetic head, a third actuator and a fourth actuator that move the second magnetic head, a fifth actuator that moves the second actuator and the fourth actuator, a drive circuit that implements at least one of a first mode in which the second actuator and the fourth actuator operate differently from each other or a second mode in which the first and third actuators operate differently from each other, and a controller that controls the drive circuit.Type: ApplicationFiled: February 21, 2020Publication date: January 14, 2021Inventors: Koichiro Miyamoto, Kenichiro Oozeki, Yu Chen
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Patent number: 8368151Abstract: When MOS transistors having a plurality of threshold voltages in which a source and a drain form a symmetrical structure are mounted on the same substrate, electrically-symmetrical characteristics is provided with respect to an exchange of the source and the drain in each MOS transistor. A MOS transistor having a large threshold voltage is provided with a halo diffusion region, and halo implantation is not performed on a MOS transistor having a small threshold voltage.Type: GrantFiled: December 22, 2009Date of Patent: February 5, 2013Assignee: Hitachi, Ltd.Inventors: Kenji Miyakoshi, Shinichiro Wada, Junji Noguchi, Koichiro Miyamoto, Masaya Iida, Masafumi Suefuji
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Publication number: 20100164015Abstract: When MOS transistors having a plurality of threshold voltages in which a source and a drain form a symmetrical structure are mounted on the same substrate, electrically-symmetrical characteristics is provided with respect to an exchange of the source and the drain in each MOS transistor. A MOS transistor having a large threshold voltage is provided with a halo diffusion region, and halo implantation is not performed on a MOS transistor having a small threshold voltage.Type: ApplicationFiled: December 22, 2009Publication date: July 1, 2010Applicant: HITACHI, LTD.Inventors: Kenji MIYAKOSHI, Shinichiro WADA, Junji NOGUCHI, Koichiro MIYAMOTO, Masaya IIDA, Masafumi SUEFUJI