Timepiece and control method of timepiece
AssigneeSeiko Instruments Inc.
InventorKazuo KATO
Life of this patent
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Abstract
A timepiece, in which an indicating hand is driven by a motor and high speed processing is required for driving a load other than the indicating hand, includes a main control circuit that instructs drive timing of the motor so as to drive the load, and that is operated by an operation frequency serving as a first frequency, and a motor control unit that generates a drive pulse for driving the motor, and that is operated by an operation frequency serving as a second frequency which is lower than the first frequency.
Claims13
A timepiece in which an indicating hand is driven by a motor and high speed processing is required for driving a load other than the indicating hand, the timepiece comprising:
- a main control circuit that instructs drive timing of the motor so as to drive the load, and that is operating at a first frequency;
- and
- a motor control unit that generates a drive pulse for driving the motor, and that is operating at a second frequency which is lower than the first frequency.
A control method of a timepiece in which an indicating hand is driven by a motor and high speed processing is required for driving a load other than the indicating hand, the method comprising:
- a step which is operated by an operation frequency serving as a first frequency, and in which a main control circuit for driving the load instructs drive timing of the motor;
- and
- a step in which a motor control unit operated by an operation frequency serving as a second frequency which is lower than the first frequency generates a drive pulse for driving the motor,
- wherein the step of instructing the drive timing includes
- a step of changing a level of a timing definition signal for defining the drive timing of the motor from a first level to a second level, based on timing of the first frequency,
- a step of changing a level of an instruction signal for instructing driving of the motor from the first level to the second level, after changing the timing definition signal to the second level,
- a step of changing the instruction signal to the first level, after changing the instruction signal to the second level, and
- a step of changing the timing definition signal from the second level to the first level, after changing the instruction signal to the first level.
Dependencies are inferred from the claim text.