AUTO CALIBRATION METHOD AND OIS CAMERA USING THE SAME

摘要

An auto calibration method and an optical image stabilizer (OIS) camera using the same are provided. The auto calibration method includes removing a DC offset of a gyroscope. A vibrator signal applied by operating a vibrator, and an actual measurement value of the gyroscope is obtained using the applied vibrator signal. A first gain value for compensating for sensitivity of the gyroscope is calculated using the vibrator signal and the actual measurement value of the gyroscope, and an actuator is operated. A displacement of a pixel actually moving on an image is moved under an operation of the actuator. A second gain value for controlling a sensitivity variation of the actuator is calculated based on the displacement of the actually moving pixel. Accordingly, it is possible to reduce processing time and to ensure high performance.

主权项

1. An auto calibration method having a gyroscope for sensing tremor and an actuator for compensating for tilting of a camera when the tremor occurs, the method comprising:
removing a DC offset of the gyroscope; applying a vibrator signal by operating a vibrator, and obtaining an actual measurement value of the gyroscope using the applied vibrator signal; calculating a first gain value for compensating for sensitivity of the gyroscope using the vibrator signal and the actual measurement value of the gyroscope; operating the actuator; measuring a displacement of a pixel actually moving on an image under an operation of the actuator; and calculating a second gain value for controlling a sensitivity variation of the actuator based on the displacement of the actually moving pixel.