Patent ID: 6049156
Filing Date: 2000-04-11
Classification: H02N

Abstract:
An apparatus that uses a driving force to perform a plurality of types of work, said apparatus comprising:a vibration type motor including a vibration member and first and second electro-mechanical energy converting element portions disposed on said vibration member;a driving circuit that generates first and second frequency signals having different phases and respectively applies the first and second frequency signals to said first and second electro-mechanical energy converting element portions to generate a vibration in said vibration member, thereby generating a driving force of the vibration type motor, said driving circuit being operable in a first mode in which said driving circuit varies the frequencies of the first and second frequency signals applied to said electro-mechanical energy converting element portions to effect driving control, and a second mode in which said driving circuit varies a voltage of the first and second frequency signals applied to said electro-mechanical energy converting element portions to effect driving control; anda switching circuit that selectively switches the mode of operation of the driving circuit to the first mode or the second mode in accordance with the type of work being performed by said apparatus.