Control apparatus for vibration wave driven apparatus
AssigneeCanon Kabushiki Kaisha
InventorsShinya Kudo, Shinji Yamamoto
Life of this patent
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Abstract
A control apparatus detects the relative position between a vibration member and a driving-member-side vibration detection portion on the basis of a signal that shows a vibrational state of the vibration member and a signal output from the driving-member-side vibration detection portion, the driving-member-side vibration detection portion being provided on a driving member and detecting a vibration of the driving member.
Claims20
A control apparatus for a vibration wave driven apparatus, wherein the vibration wave driven apparatus includes
- a vibration member including an electro-mechanical energy conversion element and an elastic member bonded to the electro-mechanical energy conversion element and provided with a projection portion, the vibration member exciting vibrations of two vibration modes in response to a drive signal applied to the vibration member, the vibrations of the two vibration modes being combined together to generate an elliptic motion of the projection portion, and
- a driving member including an end portion and moving relative to the vibration member by contacting the projection portion, and
- wherein the control apparatus detects the relative position between the vibration member and a driving-member-side vibration detection portion on a basis of a signal that shows a vibrational state of the vibration member and a signal output from the driving-member-side vibration detection portion provided on the driving member to detect a vibration of the driving member.
The control apparatus according to 2,
- wherein a plurality of the driving-member-side vibration detection portions are provided on the driving member, and
- wherein the control apparatus detects the relative position on the basis of the signal that shows the vibrational state of the vibration member and a plurality of signals output from the driving-member-side vibration detection portions.
The control apparatus according to 3,
- wherein a plurality of the driving-member-side vibration detection portions are provided on the driving member, and
- wherein the control apparatus detects the relative position on the basis of the signal that shows the vibrational state of the vibration member and a plurality of signals output from the driving-member-side vibration detection portions.
The control apparatus according to 4,
- wherein a plurality of the driving-member-side vibration detection portions are provided on the driving member, and
- wherein the control apparatus detects the relative position on the basis of the signal that shows the vibrational state of the vibration member and a plurality of signals output from the driving-member-side vibration detection portions.
Dependencies are inferred from the claim text.