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Vibration type actuator control apparatus, apparatus having the same, and storage medium storing vibration type actuator control program

  • US 10,447,176 B2
  • Filed: 12/13/2016
  • Issued: 10/15/2019
  • Est. Priority Date: 01/05/2016
  • Status: Active Grant
First Claim
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1. A vibration type actuator control apparatus configured to control driving of a vibration type actuator configured to move a moving body that is one of the vibrator and a contact body that contacts a vibrator, the vibration type actuator including the vibrator in which a vibration is excited when a two-phase drive signal having a phase difference is applied to an electro-mechanical energy conversion element, the vibration type actuator control apparatus comprising a drive signal generator configured to generate the two-phase drive signal,wherein the drive signal generator changes a phase difference of the two-phase drive signal from an initial phase difference when the moving body is moved from a stopped state, the initial phase difference being determined based on a phase difference shift indicative of a shift from a phase difference set so as to stop the moving body.

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