Patent ID: 7187104

Claim:
A control apparatus comprising: a vibration-type driving device further comprising a vibration element including an elastic body and an electro-mechanical energy conversion element having at least two electrodes and arranged to cause said elastic body to excite vibrations with two driving voltages of respective phases having the same frequency applied to the two electrodes; a driven element that is kept in contact with said elastic body, wherein said vibration element is capable of forming a first flexural vibration mode in response to inputting of the two driving voltages of respective phases that are made the same into the two electrodes and is capable of forming a second flexural vibration mode in response to inputting of the two driving voltages of respective phases that are made opposite to each other into the two electrodes; and a signal generation circuit configured to apply two driving voltages with different phases to the two electrodes, so that the first flexural vibration mode and the second flexural vibration mode are simultaneously formed to generate combined vibration and the combined vibration drives said driven element.