| 摘要 |
<p>This invention provides a control device and control method for achieving a small-sized long-life timepiece by further reducing power consumption of a stepping motor for driving the watch hands. If no rotor rotation is identified by rotation detection pulse SP2 following the first drive pulse P1, an auxiliary pulse P2 is applied. Then, in a following predetermined number of cycles (for example 3), a second drive pulse P11 is applied having an effective power several increment levels higher than the first drive pulse P1. This second drive pulse P11 drives the timepiece during temporarily increased load due to meshing tolerance etc. After completion of the three cycles, driving returns to the first drive pulse P1 having low-energy effective power. Accordingly, the level of the effective power of the first drive pulse can be maintained in a state reduced to the minimum level to achieve further reduction of power consumption. <IMAGE></p> |
