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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：US10203664B2
公开(公告)日：2019-02-12
申请号：US15244178
申请日：2016-08-23
Applicant: SEIKO INSTRUMENTS INC.
Inventor： Kazumi Sakumoto , Kotaro Watanabe , Minoru Sano
IPC: G04G19/12
Abstract: An electronic timepiece includes a first switch connected to a signal line, a second switch, and a one-shot pulse signal generation circuit. The first switch is inserted into the signal line. One end of the second switch is connected to the signal line at a rear stage of the first switch, and the other end of the second switch is connected to a power source. The one-shot pulse signal generation circuit generates a one-shot pulse signal by using a reference clock signal, and the second switch is controlled by the one-shot pulse signal. The timepiece device can reduce currents flowing in a pull-down resistor or a pull-up resistor when a crown switch is turned on.
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公开(公告)号：US10228660B2
公开(公告)日：2019-03-12
申请号：US15122619
申请日：2014-11-18
Applicant: SEIKO INSTRUMENTS INC.
Inventor： Tamotsu Maesawa , Kazumi Sakumoto , Keisuke Tsubata , Tetsuya Nobe
Abstract: A proposed electronic apparatus is capable of charging a secondary battery and performing data communication using a solar cell while suppressing effects of ambient light even when the intensity of light radiated to the solar cell is low. The electronic apparatus includes a control circuit 202 and a resistance 205. The control circuit 202 receives data based on an output voltage of a solar cell 201. The resistance 205 is connected between electrodes of the solar cell 201. The control circuit 202 controls a resistance value of the resistance 205 based on whether during an operation of receiving data or not.
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公开(公告)号：US10180661B2
公开(公告)日：2019-01-15
申请号：US15072749
申请日：2016-03-17
Applicant: SEIKO INSTRUMENTS INC.
Inventor： Kazumi Sakumoto
IPC: G04G3/02
Abstract: A frequency division circuit includes a first frequency division circuit which divides a frequency of a reference signal that is generated by an oscillation circuit. An input/output terminal outputs an output signal of the first frequency division circuit for testing. A selection circuit outputs as an intermediate signal one of a first intermediate signal which is input from the input/output output terminal, and a second intermediate signal which is an output signal of the first frequency division circuit. A second frequency division circuit divides a frequency of the intermediate signal output from the selection circuit. A switching time count circuit begins counting a predetermined amount of time after the second frequency division circuit starts frequency-dividing the intermediate signal and, after elapse of the predetermined amount of time, switches the intermediate signal output from the selection circuit from the first intermediate signal to the second intermediate signal.
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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：US10831158B2
公开(公告)日：2020-11-10
申请号：US15933850
申请日：2018-03-23
Applicant: Seiko Instruments Inc.
Inventor： Kazumi Sakumoto
Abstract: A timepiece includes a motor control unit driving a motor for driving an indicating hand, based on an instruction signal, and a control unit receiving an instruction confirmation signal corresponding to a drive state of the motor in response to the instruction signal from the motor control unit, and determining whether or not the motor is driven in accordance with the instruction signal, based on the instruction confirmation signal.
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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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10.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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