Patent ID: 7924490

Claim:
An oscillator device, comprising: an oscillation system including a first oscillator, a second oscillator, a first resilient supporting member configured to connect said first oscillator for torsional oscillation about a torsion axis relative to said second oscillator, and a second resilient supporting member configured to support said second oscillator for torsional oscillation about a torsion axis relative to a fixed member; driving means configured to drive said oscillation system; and drive control means configured to supply a driving signal to said driving means; wherein said oscillation system has at least two frequencies of natural oscillation mode around the torsion axis which include a first resonance frequency f 1 and a second resonance frequency f 2 , wherein there is a relationship that f 2 is approximately two-fold of f 1 , wherein Δf which is expressed as Δf=f 2 −f×f 1 has a relationship of Δf<0, and wherein said drive control means supplies, to said driving means, a driving signal which is comprised of a driving signal based on synthesizing a first driving signal having a first driving frequency and a second driving signal having a second driving frequency, and which is such driving signal that, when a lower-frequency side driving frequency among the first and second driving frequencies is denoted by Df 1 and a higher-frequency side driving frequency is denoted by Df 2 , it satisfies relationships Df1<f1 Df2>f2 Df 1×2= Df 2.