US 11,991,447 B2
Methods and apparatus for optical image stabilization
Yoshihisa Tabuchi, Gifu (JP)
Assigned to SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Scottsdale, AZ (US)
Filed by SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC, Phoenix, AZ (US)
Filed on Mar. 11, 2021, as Appl. No. 17/249,742.
Prior Publication US 2022/0294988 A1, Sep. 15, 2022
Int. Cl. H04N 23/68 (2023.01); G02B 27/64 (2006.01); G03B 5/00 (2021.01); G03B 5/02 (2021.01)
CPC H04N 23/687 (2023.01) [G02B 27/646 (2013.01); G03B 5/00 (2013.01); G03B 5/02 (2013.01); G03B 2205/0015 (2013.01); G03B 2217/005 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for calibrating a drive signal using an electronic device having a control circuit capable of receiving a first sensor signal having first x-, y-, and z-components and a second sensor signal having second x- and y-components, comprising:
performing a first calibration using the first and second sensor signals;
performing a plurality of subsequent calibrations, comprising:
positioning the electronic device in a plurality of positions, wherein each position is defined with respect to a reference position;
applying a plurality of input signals to the control circuit;
measuring a plurality of displacements based on at least one of the plurality of input signals;
measuring a plurality of output signals of the control circuit based on at least one of the plurality of positions;
computing a plurality of correction gain values according to at least one of the measured plurality of displacements and at least one of the output signals; and
generating the drive signal according to at least one of the first sensor signal and the second sensor signal and at least one of the plurality of correction gain values.