A driving device and method for a voice coil motor in a camera
By adjusting the segmented control signal compensation, the vibration problem in the voice coil motor driving process was solved, and the adjustment time was shortened and the control algorithm was optimized.
CN115967326BActive Publication Date: 2026-05-26MEMSIC SEMICON WUXI
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- MEMSIC SEMICON WUXI
- Filing Date
- 2021-10-08
- Publication Date
- 2026-05-26
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Figure CN115967326B_ABST
Abstract
This invention provides a driving device and method for a voice coil motor in a camera. The driving device includes a control unit storing duration parameters T1, T2, and T3. When driving the voice coil motor, the control unit calculates a first curve control signal, a second curve control signal, a third linear control signal, and a fourth linear control signal based on a target value from a command from the camera and the stored duration parameters T1, T2, and T3. These four signals form a continuous control signal. After the fourth linear control signal, the control signal represents the target value. By compensating for and adjusting the target value, the adjustment time of the voice coil motor (±5% error range) is reduced to approximately 7ms, resulting in a significant reduction in adjustment time.
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