Drive control apparatus and drive control method for vibration wave driving apparatus

摘要

Provided are a drive control apparatus and a drive control method for a vibration wave driving apparatus enabling a wider dynamic range and increased quietness. The drive control apparatus for a vibration wave driving apparatus of the present invention is a drive control apparatus for a vibration wave driving apparatus in which, by providing a drive signal to a vibrator provided with an electro-mechanical energy conversion device, a driven part in contact with the vibrator is relatively moved, wherein, when the driven part is activated by changing a frequency of the drive signal, a time throughout which the drive signal is made to be in an off state is provided every time the frequency is changed.

主权项

1. A drive control method for a vibrator, comprising activating the vibrator, the vibrator comprising an electro-mechanical energy conversion device, wherein a driven part is in contact with the vibrator, and a relative position of the driven part and the vibrator is changed by providing a drive signal to the vibrator, the method comprising:
applying as a drive signal a first drive signal having a first frequency to the vibrator; after applying the first drive signal, applying as the drive signal a second drive signal having a second frequency to the vibrator; and providing a time period throughout which the drive signal is made to be in an off state between the application of the first drive signal and the application of the second drive signal, wherein the relative position of the driven part and the vibrator remains at a first relative position during the application of the first drive signal and the time period throughout which the drive signal is made to be in the off state, and wherein the vibrator enters into a drive state, and the relative position of the driven part and the vibrator changes to a second relative position, after applying the second drive signal.