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公开(公告)号：US11016446B2
公开(公告)日：2021-05-25
申请号：US16752897
申请日：2020-01-27
Applicant: Seiko Instruments Inc.
Inventor： Satoshi Sakai , Tetsuya Nobe
Abstract: A timepiece includes a stepping motor having a rotor and a coil, and a drive circuit that applies a first drive pulse having a stable stationary position at a rotor rotation angle of 90 degrees or less from a reference position and a second drive pulse having the stable stationary position at a rotor rotation angle of 90 degrees or more from the reference position, as a pulse for driving the rotor, to the coil. When a period during which the pulse is not applied to the coil is assumed as a waiting period, the drive circuit generates the waiting period after a first application of the second drive pulse after an application of the pulse to the coil is started and rotates the rotor by one or more turns without passing through the waiting period at at least one predetermined timing after the waiting period.
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Patent Agency Ranking
公开(公告)号：US09546919B2
公开(公告)日：2017-01-17
申请号：US14211759
申请日：2014-03-14
Applicant: SEIKO INSTRUMENTS INC.
Inventor： Tetsuya Nobe
CPC classification number: G01L1/162 , G04C21/02 , G04G13/021
Abstract: An electronic apparatus includes an outer case, and a piezoelectric element mounted to an inner surface of the outer case and configured to impart vibration to the outer case due to deformation in correspondence with an applied voltage and to generate a voltage corresponding to deformation due to a shock imparted to the outer case. An induction element applies an increased voltage to the piezoelectric element, a first switch performs control as to whether or not to supply an electric current from a power source to the induction element, a second switch effects connection or disconnection between the induction element and the piezoelectric element, and a shock detection unit to detects a shock imparted to the outer case based on the voltage generated in the piezoelectric element.
Abstract translation: 一种电子设备，包括外壳和安装在外壳的内表面上的压电元件，该压电元件被构造成由于与施加的电压相对应的变形而对外壳施加振动，并且产生与由于 对外壳施加冲击。 感应元件对压电元件施加增加的电压，第一开关执行关于是否将电流从电源提供给感应元件的控制，第二开关实现感应元件和压电元件之间的连接或断开 元件和冲击检测单元，用于基于在压电元件中产生的电压来检测施加到外壳的冲击。
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公开(公告)号：US20200249630A1
公开(公告)日：2020-08-06
申请号：US16752897
申请日：2020-01-27
Applicant: Seiko Instruments Inc.
Inventor： Satoshi SAKAI , Tetsuya Nobe
Abstract: A timepiece includes a stepping motor having a rotor and a coil, and a drive circuit that applies a first drive pulse having a stable stationary position at a rotor rotation angle of 90 degrees or less from a reference position and a second drive pulse having the stable stationary position at a rotor rotation angle of 90 degrees or more from the reference position, as a pulse for driving the rotor, to the coil. When a period during which the pulse is not applied to the coil is assumed as a waiting period, the drive circuit generates the waiting period after a first application of the second drive pulse after an application of the pulse to the coil is started and rotates the rotor by one or more turns without passing through the waiting period at at least one predetermined timing after the waiting period.
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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：US10816935B2
公开(公告)日：2020-10-27
申请号：US16505311
申请日：2019-07-08
Applicant: Seiko Instruments Inc.
Inventor： Tetsuya Nobe
Abstract: A motor driving apparatus is a pulse generation circuit applying a drive pulse for rotating a rotor to a two stepping motor including the rotor magnetized in two poles and a stator in which a two-phase coil is wound around a yoke. The drive pulse is constituted of a drive pulse P1 and a drive pulse P2. The pulse generation circuit applies the drive pulse P1 having a stable stationary position at which a rotor rotation angle from a reference position is 90 degrees or less and applies the drive pulse P2 having a stable stationary position at which the rotor rotation angle from the reference position is 90 degrees or more continuously to the application of the drive pulse P1.
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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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