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1.发明授权公开(公告)号：US11929640B2
公开(公告)日：2024-03-12
申请号：US17022918
申请日：2020-09-16
Applicant: Seiko Instruments Inc.
Inventor： Kosuke Yamamoto , Shinji Kinoshita , Hitoshi Takeuchi , Tatsuya Omura
CPC classification number: H02K1/143 , G04C3/14 , H02K15/022 , H02K37/16 , G04C3/12
Abstract: A stator includes a magnetic plate material that has a main plate surface that is a surface to face a main plate of a movement when assembled to the main plate and that has a rotor accommodating hole formed in a part thereof; and a non-magnetic region that is made non-magnetic by applying chromium on the main plate surface around the rotor accommodating hole and irradiating the chromium with a laser from the main plate surface side.
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公开(公告)号：US10067480B2
公开(公告)日：2018-09-04
申请号：US15035691
申请日：2014-10-17
Applicant: SEIKO INSTRUMENTS INC.
Inventor： Kenji Ogasawara , Akira Takakura , Kazumi Sakumoto , Tamotsu Maesawa , Kazuhiro Koyama , Tomohiro Ihashi , Kosuke Yamamoto , Ayumi Matsumoto
Abstract: An electronic device includes at least an acquisition unit, an input unit, a time correction amount calculation unit, and a transmitting unit. A timepiece includes at least a receiving unit, a power storage unit, a drive unit, and a control unit. The input unit receives an input of the time displayed by the display unit of the timepiece. The time correction amount calculation unit calculates a time correction amount for correcting the time of the timepiece from a difference between the time, the input of which is received by the input unit and the current time acquired by the acquisition unit. The transmitting unit transmits the time correction amount to the timepiece by using light. The receiving unit receives the time correction amount. The power storage unit stores electricity by using power converted from the light. The drive unit drives the indicating hand. The control unit corrects the time displayed by the indicating hand, based on the time correction amount received by the receiving unit. The control unit controls a power storage period in the power storage unit and a receiving period in the receiving unit so as to receive the time correction amount in the receiving period.
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3.发明授权公开(公告)号：US09086685B2
公开(公告)日：2015-07-21
申请号：US13737032
申请日：2013-01-09
Applicant: Seiko Instruments Inc.
Inventor： Kosuke Yamamoto , Akira Takakura , Kenji Ogasawara , Saburo Manaka , Kazumi Sakumoto , Keishi Honmura
Abstract: A control circuit selects a drive pulse group corresponding to the detected voltage of a power cell from among plural drive pulse groups each including plural types of main drive pulses, and selects a drive pulse according to the detected condition of rotation of a stepping motor from among main drive pulses included in the selected drive pulse group or a correction drive pulse having larger energy than the main drive pulses. When the control circuit selects a main drive pulse initially by selecting the drive pulse group, the control circuit selects the main drive pulse having the largest energy in the selected drive pulse group. A drive pulse group selection circuit drives the stepping motor by the main drive pulse in the drive pulse group selected by the control circuit or the correction drive pulse via a main drive pulse output circuit and a correction drive pulse output circuit.
Abstract translation: 控制电路从包括多种主驱动脉冲的多个驱动脉冲组中选择对应于功率单元的检测电压的驱动脉冲组，并根据检测到的步进电机的旋转条件从 包括在所选择的驱动脉冲组中的主驱动脉冲或具有比主驱动脉冲更大的能量的校正驱动脉冲。 当控制电路首先通过选择驱动脉冲组选择主驱动脉冲时，控制电路选择所选择的驱动脉冲组中具有最大能量的主驱动脉冲。 驱动脉冲组选择电路通过主驱动脉冲输出电路和校正驱动脉冲输出电路，通过由控制电路选择的驱动脉冲群中的主驱动脉冲或校正驱动脉冲来驱动步进电机。
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4.发明授权公开(公告)号：US10146186B2
公开(公告)日：2018-12-04
申请号：US15295477
申请日：2016-10-17
Applicant: Seiko Instruments Inc.
Inventor： Kosuke Yamamoto , Shinji Kinoshita
Abstract: A stepping motor includes a rotor that is used in rotating an indicating hand, and a stator that configures a magnetic path, that is made of an alloy containing Fe, Ni, and Cr, and in which a Cr-diffusion region whose Cr-concentration is 14 mass % or greater is disposed in a portion whose cross-sectional area in the magnetic path is smaller than a cross-sectional area of other portions.
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公开(公告)号：US09800333B2
公开(公告)日：2017-10-24
申请号：US14854931
申请日：2015-09-15
Applicant: SEIKO INSTRUMENTS INC.
Inventor： Kenji Ogasawara , Akira Takakura , Kazumi Sakumoto , Tamotsu Maesawa , Kazuhiro Koyama , Tomohiro Ihashi , Kosuke Yamamoto , Ayumi Matsumoto
IPC: H04B10/114 , H04B10/116
CPC classification number: H04B10/114 , H04B10/116
Abstract: An electronic device includes a display part having a light source which transmits an optical signal, a direction detection part for detecting a direction of orientation of a display screen of the display part, and a controller for transmitting data by the optical signal from the display part to an electronic timepiece when the direction of orientation of the display screen detected by the detection part faces a predetermined direction.
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Patent Agency Ranking
6.发明授权公开(公告)号：US09190941B2
公开(公告)日：2015-11-17
申请号：US14013146
申请日：2013-08-29
Applicant: SEIKO INSTRUMENTS INC.
Inventor： Saburo Manaka , Kenji Ogasawara , Kazumi Sakumoto , Keishi Honmura , Kosuke Yamamoto , Satoshi Sakai
Abstract: A rotation detection circuit detects an induced current flowing through a drive coil of a stepping motor in a detection section divided into a plurality of sections, and detects a rotation state of the stepping motor on the basis of a pattern indicating whether or not the induced current exceeds a predetermined reference value in each of the sections. A control unit selects a drive pulse corresponding to the rotation state detected by the rotation detection unit, and supplies a drive current to a drive coil to rotatably drive the stepping motor. The rotation detection unit carries out detection by selecting a detection direction of the induced current in the sections after the first section on the basis of whether or not the induced current exceeding each of a plurality of reference values is detected plural times in the first section.
Abstract translation: 旋转检测电路检测在划分为多个部分的检测部中流过步进电动机的驱动线圈的感应电流，并且基于表示感应电流的图案来检测步进电动机的旋转状态 在每个部分中超过预定的参考值。 控制单元选择与由旋转检测单元检测到的旋转状态对应的驱动脉冲，并向驱动线圈提供驱动电流以可旋转地驱动步进电机。 旋转检测单元基于在第一部分中是否检测到多个参考值中的每一个以上的感应电流被多次检测，在第一部分之后的部分中选择感应电流的检测方向来进行检测。
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7.发明授权公开(公告)号：US09182746B2
公开(公告)日：2015-11-10
申请号：US14013120
申请日：2013-08-29
Applicant: SEIKO INSTRUMENTS INC.
Inventor： Kosuke Yamamoto , Saburo Manaka , Kazumi Sakumoto , Kenji Ogasawara , Keishi Honmura , Satoshi Sakai
Abstract: A stepping motor control circuit includes: a rotation detection unit that detects a induced signal exceeding a predetermined reference threshold voltage which is generated by a stepping motor in a detection section divided into at least three sections, and detects a rotation state on the basis of a pattern indicating whether the induced signal exceeding a reference threshold voltage is detected in each of the sections; and a control unit that selects a main drive pulse depending on the rotation state detected by the rotation detection unit from a plurality of main drive pulses which are different from each other in energy, and drives the stepping motor. When the induced signal exceeding a reference threshold voltage is not detected in an initial section, the rotation detection unit detects the induced signal by shifting an end position of at least one section other than the initial section to a rear side by a predetermined amount.
Abstract translation: 步进电机控制电路包括：旋转检测单元，其检测超过由划分为至少三个部分的检测部中由步进电机产生的预定参考阈值电压的感应信号，并基于 指示在每个部分中是否检测到超过参考阈值电压的感应信号的模式; 以及控制单元，其根据由旋转检测单元检测的旋转状态，从能量彼此不同的多个主驱动脉冲中选择主驱动脉冲，并驱动步进电机。 当在初始部分中没有检测到超过参考阈值电压的感应信号时，旋转检测单元通过将除了初始部分之外的至少一个部分的结束位置向后侧移动预定量来检测感应信号。
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公开(公告)号：US11334030B2
公开(公告)日：2022-05-17
申请号：US16737391
申请日：2020-01-08
Applicant: Seiko Instruments Inc.
Inventor： Kosuke Yamamoto
Abstract: A timepiece includes a determination unit configured to execute determination processing of determining whether a braking force that brakes a rotor is preferably large or small, the rotor being rotated in a normal rotation direction to rotate a pointer clockwise; and a detection control unit configured to cause execution of rotation detection processing of detecting rotation of the rotor based on a first induced voltage output to a predetermined terminal among the first terminal and the second terminal being connected to a coil configured to generate a magnetic flux to rotate the rotor in the normal rotation direction, the predetermined terminal being selected based on the determination by the determination unit.
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公开(公告)号：US11424702B2
公开(公告)日：2022-08-23
申请号：US16801816
申请日：2020-02-26
Applicant: Seiko Instruments Inc.
Inventor： Tetsuya Nobe , Satoshi Sakai , Kazumi Sakumoto , Kosuke Yamamoto , Akihito Okumura
Abstract: A motor driving apparatus including a driving circuit for supplying a first pulse with which a first coil included in a two-phase stepping motor generates a first magnetic flux, a second pulse with which a second coil included in the stepping motor generates a second magnetic flux opposite to the first magnetic flux, a third pulse with which the first coil generates the second magnetic flux, and a fourth pulse with which the second coil generates the first magnetic flux, to the stepping motor. The driving circuit supplies the second pulse, the third pulse, and the fourth pulse in this order to the stepping motor in a state of being stopped to start the stepping motor, and supplies the first pulse, the second pulse, the third pulse, and the fourth pulse in this order to the stepping motor after starting to continuously drive the stepping motor.
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公开(公告)号：US11316454B2
公开(公告)日：2022-04-26
申请号：US17004363
申请日：2020-08-27
Applicant: Seiko Instruments Inc.
Inventor： Akihito Okumura , Kosuke Yamamoto , Kenji Ogasawara , Tomohiro Ihashi
Abstract: A stepping motor control device is configured to drive a stepping motor by applying a normal drive pulse or a fixed pulse having an energy larger than that of the normal drive pulse. The stepping motor control device includes a determination unit configured to, based on whether or not a pulse applied to the stepping motor before the normal drive pulse is the fixed pulse, determine whether or not to add a degaussing pulse is applied to the normal drive pulse, the degaussing pulse being a pulse for canceling a residual magnetic flux generated in a stator of the stepping motor when the fixed pulse; and a drive control unit configured to, based on a determination result of the determination unit, drive the stepping motor with the normal drive pulse to which the degaussing pulse is added.
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