Control method of voice coil motor and lens focusing system

The invention discloses a control method of a voice coil motor. Total variable amount of coil current of the voice coil motor is divided into multiple times of change. Each change time is 1/2 of a resonant period of a spring of the voice coil motor so as to greatly reduce resonant degree of the spri...

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Bibliographische Detailangaben
Hauptverfasser:	XU QINGXUN, HUANG HONGAN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHYSICS
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Beschreibung
Zusammenfassung:	The invention discloses a control method of a voice coil motor. Total variable amount of coil current of the voice coil motor is divided into multiple times of change. Each change time is 1/2 of a resonant period of a spring of the voice coil motor so as to greatly reduce resonant degree of the spring so that the voice coil motor is quickly stabilized. The control method is applied to the lens focusing system to shorten the focusing time.