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US 12,532,076 B2Granted
Methods and apparatus for optical image stabilization
AssigneeSemiconductor Components Industries, LLC
InventorYoshihisa Tabuchi
Life of this patent
Estimating the term…
Abstract
Various embodiments of the present technology may provide methods and apparatus for optical image stabilization. The methods and apparatus for optical image stabilization may be integrated within an electronic device. An exemplary system may include an actuator control circuit responsive to a sensor and a feedback signal from an actuator. The actuator control circuit may be configured to calibrate a gain applied to a drive signal based on a measured displacement of the electronic device and an output signal generated by the actuator control circuit.
Claims16
A system for positioning a lens, the system comprising:
- an actuator control unit, wherein the actuator control unit includes:
- a plurality of registers, wherein registers of a first subset of the plurality of registers are configured to store velocity values, and wherein registers of a second subset of the plurality of registers are configured to store acceleration values;
- a first plurality of correction circuits configured to produce, using one or more of the velocity values, a first plurality of force correction signals and a second plurality of force correction signals;
- a second plurality of correction circuits configured to produce, using one or more of the acceleration values, a first corrected acceleration value along a first axis and a second corrected acceleration value along a second axis perpendicular to the first axis;
- a first adder configured to produce a first sum signal using the first plurality of force correction signals and the first corrected acceleration value;
- a second adder configured to produce a second sum signal using the second plurality of force correction signals and the second corrected acceleration value;
- and
- one or more drivers configured to cause an adjustment to a position of the lens based on the first sum signal and the second sum signal.
5 more elements
A method comprising:
- storing, using a first subset of a plurality of registers of an actuator control unit, velocity values received from a gyro sensor;
- storing, using a second subset of the plurality of registers of the actuator control unit, acceleration values an acceleration sensor;
- producing, based on at least one of the velocity values and one or more first correction circuits, a first plurality of force correction signals and a second plurality of force correction signals;
- producing, based on at least one of the acceleration values and one or more second correction circuits, a first corrected acceleration value along a first axis and a second corrected acceleration value along a second axis perpendicular to the first axis;
- producing, using a first adder, a first sum signal by adding the first plurality of force correction signals and the first corrected acceleration value;
- producing, using a second adder, a second sum signal by adding the second plurality of force correction signals and the second corrected acceleration value;
- and
- adjusting, using one or more drivers, a position of a lens based on the first sum signal and the second sum signal.
5 more elements
A system comprising:
- a gyro sensor configured to generate a plurality of velocity values;
- an acceleration sensor configured to generate a plurality of acceleration values;
- an actuator configured to adjust a position of a lens;
- and
- an actuator control unit configured to generate, using a first sum signal and a second sum signal, drive signals to cause the actuator to adjust of the position of the lens, wherein the actuator control unit is coupled to the gyro sensor and the acceleration sensor, and wherein the actuator control unit includes:
- a plurality of correction circuits configured to:
- produce, using one or more of the velocity values, a first plurality of force correction signals and a second plurality of force correction signals, and
- produce, using one or more of the acceleration values, a first corrected acceleration value along a first axis and a second corrected acceleration value along a second axis perpendicular to the first axis;
- a plurality of adders configured to:
- produce the first sum signal using the first plurality of force correction signals and the first corrected acceleration value, and
- produce the second sum signal using the second plurality of force correction signals and the second corrected acceleration value;
- and
- one or more drivers configured to, using the drive signals, cause the actuator to cause the adjustment of the position of the lens.
10 more elements
Dependencies are inferred from the claim text.