Actuator and light scanning apparatus
AssigneeMitsumi Electric Co., Ltd.
InventorKensuke Yamada
Life of this patent
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Abstract
An actuator including a beam configured to support an object to be driven, and a drive source to which a drive signal is input, wherein the drive signal includes a drive waveform in a shape of sawtooth waveform, a rising of the drive waveform in the shape of sawtooth waveform includes a first staircase waveform and a second staircase waveform continuing from the first staircase waveform, the first staircase waveform generates oscillation of a ringing suppressing waveform for suppressing a ringing waveform to be generated in the second staircase waveform, and the object to be driven is driven to swing in a direction of rotating around the predetermined axis by driving the drive source.
Claims8
A method for driving an object to be driven using an actuator including
- a beam configured to support the object to be driven, and a drive source, the method comprising:
- generating a first staircase waveform that is oscillation of a ringing suppressing waveform for suppressing a ringing waveform to be generated;
- generating a second staircase waveform that causes the ringing waveform to occur, the second staircase waveform continuing from the first staircase waveform;
- generating a drive signal, the drive signal combining the first staircase waveform and the second staircase waveform so as to have a shape of sawtooth waveform in a rising of a drive waveform;
- and
- driving the object to be driven with the drive source so as to swing in a direction of rotating around a predetermined axis while suppressing the ringing waveform.
Dependencies are inferred from the claim text.