Patent ID: 8779714
Filing Date: 2014-07-15
Classification: G03B

Abstract:
1. A movable unit driving apparatus which drives a movable unit by a motor, the movable unit driving apparatus comprising: a first detection unit configured to detect that the movable unit passes a first position; a second detection unit configured to detect that the movable unit passes a second position after the first detection unit detects that the movable unit has passed the first position; a third detection unit configured to detect that the movable unit passes a third position after the first detection unit detects that the movable unit has passed the first position and before the second detection unit detects the movable unit passes the second position; a first measurement unit configured to measure first time from when the first detection unit detects that the movable unit passes the first position to when the second detection unit detects that the movable unit passes the second position; a second measurement unit configured to measure second time from when the third detection unit detects that the movable unit passes the third position to when the second detection unit detects that the movable unit passes the second position; and a setting unit configured to set time from when the movable unit is detected to have passed the second position to when a brake is applied to the motor based on the first time measured, and set an amount of electricity to be supplied to the motor from when the movable unit is detected to have passed the second position to when the brake is applied to the motor based on the second time.