发明名称 |
METHOD FOR DRIVING PIEZOELECTRIC ACTUATOR, PIEZOELECTRIC-ACTUATOR CONTROL CIRCUIT, AND IMAGE-STABILIZATION CONTROL CIRCUIT |
摘要 |
Abnormal noise generated while driving a piezoelectric actuator is prevented. A pulse-generation circuit is capable of selectively generating a displacement pulse and a stationary pulse as a drive pulse for application to a piezoelectric element, the displacement pulse having a duty ratio for causing a lens to be displaced by a predetermined step width, and the stationary pulse having a duty ratio for causing the lens to remain stationary in a current position. The pulse-generation circuit controls the production of the drive pulse continuously for a plurality of times within the servo control cycle, causes the displacement pulse to be produced when the remainder of a required amount of displacement is equal to or greater than a threshold value, and causes the stationary pulse to be continuously produced until the initiation of the next servo control cycle when the remainder is less than the threshold value.
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申请公布号 |
US2010271700(A1) |
申请公布日期 |
2010.10.28 |
申请号 |
US20100754030 |
申请日期 |
2010.04.05 |
申请人 |
SANYO ELECTRIC CO., LTD.;SANYO SEMICONDUCTOR CO., LTD.;FUJINON CORPORATION |
发明人 |
TOKORO TETSUYA;SHIGEOKA YUKIHIKO;ITO HISAO;YOSHIDA HIDEO;NAGAMITSU TAKEZO |
分类号 |
G02B27/64;H02N2/06 |
主分类号 |
G02B27/64 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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