| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve such a problem of a vibration member driving circuit in the past that the amplitude change of alternating voltage to be applied to a piezoelectric element may increase near the resonance frequency of a vibration member in some frequency band to be used, which results in the large change in the alternating voltage when the resonance frequency of the vibration member varies. <P>SOLUTION: A vibration member driving circuit causes vibrations in a vibration member, at least including an electro-mechanical energy conversion element and an elastic body, by applying alternating voltage to the electro-mechanical energy conversion element fixed to the elastic body. The vibration member driving circuit includes an inductor and a capacitor serially connected to the electro-mechanical energy conversion element. 0.73*fm<fs<1.2*fm is satisfied where fs is the series resonance frequency by the inductor and the capacitor and fm is the resonance frequency of the vibration member. <P>COPYRIGHT: (C)2012,JPO&INPIT |
