Watch
AssigneeSeiko Watch Kabushiki Kaisha
InventorsKosuke Yamamoto, Kazumi Sakumoto, Akihito Okumura
Life of this patent
Estimating the term…
Abstract
An object of the invention is to prevent a positional deviation of a hand while reducing power consumption. A watch includes: a plurality of hands; a plurality of motors configured to drive or brake the plurality of hands, respectively; a pulse generation unit configured to supply, to the plurality of motors, a drive pulse for driving the hands and a lock pulse for braking the hands; and a control unit configured to control an operation mode including a normal hand movement mode and a tactile read mode, and the pulse generation unit supplies the lock pulse to the motors when the control unit shifts the operation mode to the tactile read mode.
Claims12
A watch comprising:
- a plurality of hands;
- a plurality of motors configured to drive or brake the plurality of hands, respectively;
- a pulse generation unit configured to supply, to the plurality of motors, a drive pulse for driving the hands and a lock pulse for braking the hands;
- and
- a control unit configured to control an operation mode including a normal hand movement mode and a tactile read mode, wherein
- the pulse generation unit supplies the lock pulse to the motors when the control unit shifts the operation mode to the tactile read mode.
A watch comprising:
- a plurality of hands;
- a plurality of two-coil motors each including a first coil and a second coil, and configured to drive or brake the plurality of hands, respectively;
- a pulse generation unit configured to supply, to the plurality of motors, a drive pulse for driving the plurality of hands and a lock pulse for braking the plurality of hands;
- and
- a control unit configured to control an operation mode including a normal hand movement mode and a tactile read mode, wherein
- in the tactile read mode, in a standby state in which a circuit of the first coil is opened and a circuit of the second coil is closed, when the control unit detects an electromotive force generated in the second coil due to rotation of a rotor of the motor, the control unit causes the lock pulse to perform excitation.
A watch comprising:
- a plurality of hands;
- a plurality of two-coil motors each including a first coil and a second coil, and configured to drive or brake the plurality of hands, respectively;
- a pulse generation unit configured to supply, to the plurality of motors, a drive pulse for driving the plurality of hands and a lock pulse for braking the plurality of hands;
- and
- a control unit configured to control an operation mode including a normal hand movement mode and a tactile read mode, wherein
- in the tactile read mode, in a standby state in which at least one circuit of the first coil and the second coil is closed, when the control unit detects an electromotive force generated in the first coil or the second coil due to rotation of a rotor of the motor, only the first coil is excited by the lock pulse.
Dependencies are inferred from the claim text.