×

CONTROL APPARATUS OF VIBRATION-TYPE ACTUATOR

  • US 20130249445A1
  • Filed: 10/26/2011
  • Published: 09/26/2013
  • Est. Priority Date: 11/26/2010
  • Status: Abandoned Application
First Claim
Patent Images

1. A control apparatus of a vibration-type actuator that rotates, relative to a vibrating member, a moving member that is in contact with a plurality of protrusions of the vibrating member by applying an alternating voltage to an electromechanical energy conversion element of the vibrating member including the electromechanical energy conversion element and by generating elliptic motions in the plurality of protrusions of the vibrating member,wherein information regarding a rotational speed of the moving member is obtained using information regarding a frequency corresponding to the number of the plurality of protrusions, the information regarding the frequency being included in a detection signal from the electromechanical energy conversion element for detecting vibration provided in the vibrating member.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×