Stepping motor driving device, lens driving device, and camera
US7759896B2 · kind B2 · utility
0Cited by
6References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 24, 2007 |
| Grant date | Jul 20, 2010 |
| Priority date | — |
| Expiry date | Jun 27, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P8/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A stepping motor driving device which makes it possible to reduce electric power consumed by a stepping motor and at the same time suppress degradation of shake correcting performance. A CPU of the stepping motor driving device switches between a first driving method in which a first applied voltage is applied to the stepping motor and a second driving method in which each pulse is divided to apply the first applied voltage over a predetermined time period and then apply a second applied voltage to the stepping motor, depending on the state of the drive frequency of the stepping motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.