Patent ID: 6900576

Claim:
A camera module comprising: an imaging device; an electrostatic actuator including: a first statical member having an electrode array comprising at least three groups of activating electrodes periodically deployed in a first direction, a second statical member facing the first statical member and having an electrode extending in the first direction, a movable piece provided between the first and second statical members, and a switching circuit configured to apply a first voltage between at least one of the at least three groups of activating electrodes of the first statical member and the movable piece and also configured to apply a second voltage between the electrode of the second statical member and the movable piece, the first voltage being applied sequentially to each of the at least three groups of activating electrodes in the first direction, the second voltage being intermittently applied while the first voltage is applied, wherein a potential difference caused by applying the first voltage between the activating electrodes of the first statical member and the movable piece is larger than a potential difference caused by applying the second voltage between the electrode of the second statical member and the movable piece; and a lens mounted on the movable piece of the electrostatic actuator and configured to input optical information to the imaging device.