Abstract: An optical image stabilizer including an offset remover configured to remove a direct current offset of an angular velocity signal and output a corrected angular velocity signal; an idle state determiner configured to determine a moving-state or an idle state of the optical image stabilizer based on the corrected angular velocity signal; a switching filter configured to filter the corrected angular velocity signal using a second filter during a stabilization time and subsequently filter the corrected angular velocity signal using a first filter switched from the second filter when the optical image stabilizer is in the moving-state; and an integrator configured to integrate the filtered corrected angular velocity signal from the switching filter to output an angular position signal.

Abstract: An optical image stabilizer including an angular velocity calculator configured to receive an angular velocity signal from an angular velocity sensor and output a corrected angular velocity signal and an angular position signal; a state detector configured to calculate an autocorrelation value according to the corrected angular velocity signal, compare the autocorrelation value with a threshold value to determine a stopped state or a moving state of a camera module, and output a corrected angular position signal and control coefficients; and a lens controller configured to control a lens module according to the corrected angular position signal and the control coefficients.

Abstract: An optical image stabilizer including an offset remover configured to remove a direct current offset of an angular velocity signal and output a corrected angular velocity signal; an idle state determiner configured to determine a moving-state or an idle state of the optical image stabilizer based on the corrected angular velocity signal; a switching filter configured to filter the corrected angular velocity signal using a second filter during a stabilization time and subsequently filter the corrected angular velocity signal using a first filter switched from the second filter when the optical image stabilizer is in the moving-state; and an integrator configured to integrate the filtered corrected angular velocity signal from the switching filter to output an angular position signal.

Abstract: An optical image stabilizer including an angular velocity calculator configured to receive an angular velocity signal from an angular velocity sensor and output a corrected angular velocity signal generated by correcting the angular velocity signal and an angular position signal generated by integrating the corrected angular velocity signal; a state detector configured to calculate an amount of energy by summing squared values of the corrected angular velocity signal during an energy period, comparing the amount of energy with a threshold value to determine a stopped state or a moving state of a camera module, and output a corrected angular position signal and control coefficients; and a lens controller configured to control a lens module according to the corrected angular position signal and the control coefficients.

Abstract: An optical image stabilizer including an angular velocity calculator configured to receive an angular velocity signal from an angular velocity sensor and output a corrected angular velocity signal and an angular position signal; a state detector configured to calculate an autocorrelation value according to the corrected angular velocity signal, compare the autocorrelation value with a threshold value to determine a stopped state or a moving state of a camera module, and output a corrected angular position signal and control coefficients; and a lens controller configured to control a lens module according to the corrected angular position signal and the control coefficients.

Abstract: An optical image stabilizer including an angular velocity calculator configured to receive an angular velocity signal from an angular velocity sensor and output a corrected angular velocity signal generated by correcting the angular velocity signal and an angular position signal generated by integrating the corrected angular velocity signal; a state detector configured to calculate an amount of energy by summing squared values of the corrected angular velocity signal during an energy period, comparing the amount of energy with a threshold value to determine a stopped state or a moving state of a camera module, and output a corrected angular position signal and control coefficients; and a lens controller configured to control a lens module according to the corrected angular position signal and the control coefficients.