Optical image stabilization compensations

摘要

Some embodiments include an optical image stabilization system. The optical image stabilization system includes a sensor. The sensor is configured for measuring movements of a camera module stabilized by the optical image stabilization system. Some embodiments further include an optical image stabilization control system for calculating from the movements a calculated position of a moving body. In some embodiments, the moving body is part of a camera module. Some embodiments further include an actuator control for generating electrical signals to move at least two actuators to achieve a calculated position of the moving body. In some embodiments, the actuator control system receives measurements from positions sensors that assess the position of the moving body.

主权项

1. An optical image stabilization system, comprising:
a sensor, wherein
the sensor is configured for measuring movements of a camera module stabilized by the optical image stabilization system; an optical image stabilization control system for calculating, based at least in part on the movements measured by the sensor, a calculated position of a moving body, wherein
the moving body is part of the camera module; and an actuator control system for generating calculated electrical signals to drive at least two actuators to move the moving body to the calculated position of the moving body, wherein the actuator control system is configured to:
receive, as feedback for closed loop position control of the moving body, measurements from positions sensors that assess the position of the moving body, wherein one or more of the measurements from the position sensors include positional uncertainty based at least in part on one or more effects of crosstalk between axes of the actuators; andgenerate the calculated electrical signals based at least in part on one or more open loop parameters determined to compensate for the positional uncertainty in the one or more of the measurements from the position sensors, wherein the one or more open loop parameters are determined based at least in part on data obtained during a calibration of the camera module.