Methods and apparatus for optical image stabilization
AssigneeSemiconductor Components Industries, LLC
InventorYukihiko SHIGEOKA
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Abstract
Various embodiments of the present technology may comprise a method and apparatus for optical image stabilization. The apparatus may comprise a lens coupled to an actuator. The actuator may receive signals from an OIS circuit corresponding to a magnitude and direction, and the actuator may act on these signals by positioning the lens accordingly. The OIS circuit may comprise a gain control circuit configured to limit the magnitude of the signal sent to the actuator.
Claims20
An optical image stabilization apparatus, comprising:
- a first gain element with an adjustable gain;
- an integration circuit coupled to an output terminal the first gain element;
- a gain control circuit coupled to the integration circuit wherein the gain control circuit outputs a value representing one of:
- a starting coefficient and a new coefficient;
- wherein the first gain element is responsive to the gain control circuit and the adjustable gain is based on the output value of the gain control circuit.
A method for setting a gain in an imaging system, comprising:
- amplifying, with a first gain element having an adjustable gain, an input signal according to a first coefficient;
- computing a second coefficient utilizing the first coefficient;
- and
- setting the gain of the first gain element according to one of the first coefficient and the second coefficient.
An imaging system, comprising:
- a lens module, comprising
- a lens;
- and
- an actuator capable of positioning the lens;
- a gyro sensor adjacent to the lens module and capable of detecting the angular velocity of the lens module;
- and
- an OIS circuit coupled to the lens module and capable of receiving angular velocity data from the gyro sensor, comprising:
- a first gain element having an adjustable gain;
- an integration module, comprising:
- an integration circuit coupled to the first gain element;
- wherein:
- an output of the integration module is based on the gain of the first gain unit;
- and
- the actuator is responsive to the OIS circuit and positions the lens based on the output of the integration module;
- and
- a gain control circuit coupled to the integration module wherein the gain control circuit outputs a value representing one of:
- a starting coefficient and a new coefficient;
- wherein:
- the first gain element is responsive to the gain control circuit and configured to adjust the gain based on the value output from the gain control circuit.
Dependencies are inferred from the claim text.