Patent ID: 9520813
Filing Date: 2016-12-13
CPC Classification: G02B,H01L,H02N

Claim Text:
1. An actuator drive device configured to drive an actuator which includes a driver and a drive electrode, said actuator drive device comprising: a storage section for storing a drive condition of the actuator; a processor for calculating and outputting drive signal D(t) based on a drive base signal V(t) calculated based on the drive condition with respect to time t; and a generator for outputting, based on the drive signal D(t) calculated, a driving signal to the drive electrode of the actuator for driving the driver of the actuator, wherein the actuator drive device is configured to drive the actuator in a main mode while not exciting the actuator in a mode different from the main mode, wherein the drive base signal V(t) is a sum of a fundamental wave and at least one harmonic wave of the fundamental wave, and is expressed as: with an amplitude A, an integer N, a coefficient a wherein frequencies of the fundamental wave and the at least one harmonic wave of the fundamental wave includes a resonance frequency f wherein the mode, different from the main mode, is excited with a vibration at a resonance frequency f wherein an upper limit frequency out of the frequencies of the fundamental wave and the at least one harmonic wave of the fundamental wave is a frequency f wherein a frequency kf wherein the processor is operable to determine the coefficient a