Patent ID: 11967914
Assignee: CANON KABUSHIKI KAISHA
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 14:
15. A vibration actuator control device comprising:
a control unit configured to output a first control signal for controlling driving of a first vibration actuator including a first vibrating body and a first contact body in contact with the first vibrating body, and output a second control signal for controlling driving of a second vibration actuator different from the first vibration actuator and including a second vibrating body different from the first vibrating body and a second contact body different from the first contact body, wherein the second contact body is in contact with the second vibrating body; and
a driving unit configured to (i) output a first alternating-current voltage in a first plurality of phases, set based on the first control signal, for driving the first vibration actuator, and (ii) output a second alternating-current voltage in a second plurality of phases, set based on the second control signal, for driving the second vibration actuator,
wherein the control unit individually sets a phase difference of the first alternating-current voltage and a phase difference of the second alternating-current voltage or a voltage value of the first alternating-current voltage and a voltage value of the second alternating-current voltage based on the first control signal and the second control signal, respectively, and commonly sets a frequency of the first alternating-current voltage and a frequency of the second alternating-current voltage,
wherein the control unit sets, to a first lower limit, a resonance frequency of the first vibration actuator in a case where the phase difference of the first alternating-current voltage is zero degrees, sets, to a first upper limit, a maximum frequency of the first alternating-current voltage at which the first vibration actuator is drivable, sets, to a second lower limit, a resonance frequency of the second vibration actuator in a case where the phase difference of the second alternating-current voltage is zero degrees, and sets, to a second upper limit, a maximum frequency of the second alternating-current voltage at which the second vibration actuator is drivable, and
wherein the control unit commonly sets the frequency of the first alternating-current voltage and the frequency of the second alternating-current voltage in a range in which a range between the first lower limit and the first upper limit overlaps a range between the second lower limit and the second upper limit.