Patent ID: 6977474

Claim:
A motor driving apparatus for driving a linear vibration motor having a reciprocatable mover and a spring member which supports the mover, said motor driving apparatus comprising: a driving frequency determining unit operable to determine a driving frequency of the linear vibration motor; a position detection unit operable to detect a position of the mover; and a motor driver operable to supply an AC voltage as a driving voltage to the linear vibration motor; wherein said driving frequency determining unit is operable to set the driving frequency at a resonance frequency which brings a spring vibration system including the mover into a resonance state when the position of the mover detected by said position detection unit does not exceed a predetermined reference position, and to set the driving frequency at a frequency which is higher than the resonance frequency when the position of the mover detected by said position detection unit exceeds the reference position; wherein said motor driver is operable to control at least one of a motor output of the linear vibration motor and a stroke of the mover by adjusting a frequency of the AC voltage; and wherein said motor driver is operable to control the stroke of the mover by adjusting the frequency of the AC voltage supplied to the linear vibration motor so as to be equal to the driving frequency determined by said driving frequency determining unit.