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AssigneesSanyo Electric Co., Ltd., Sanyo Semiconductor Co., Ltd.
InventorsYoshihisa Yamada, Tomonori Kamiya
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In a control circuit for servo control of a piezoelectric actuator, it is possible to efficiently move a movement object toward a target position in each servo control cycle. A pulse generation circuit (26) generates a drive pulse a plurality of times within a servo control cycle. The ideal value of the amount of movement in one drive pulse is stored in a register (28), and is used to estimate the amount of movement required to reach the target position of a lens (8) each time a drive pulse is generated. It is possible to switch between coarse movement and fine movement by using two types of drive pulses that have mutually different duty ratios, and the lens (8) can be rapidly moved by coarse movement when the required amount of movement is large, and fine movement when the required amount of movement is small.
A piezoelectric actuator control circuit for controlling displacement of an object by a piezoelectric actuator that uses a piezoelectric element, on the basis of an amount of displacement of the object obtained in each of a predetermined servo control cycle;
An image stabilization control circuit comprising:
Dependencies are inferred from the claim text.