Liquid lens control systems and methods
AssigneeCorning Incorporated
InventorsRaymond Miller Karam, Thomas Mikio Wynne
Life of this patent
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Abstract
A liquid lens can tilt a fluid interface, such as for optical image stabilization or off-axis focus. Tilting the interface can cause coma aberration or other dynamic wavefront error. The liquid lens can be driven to reduce the coma aberration or other dynamic wavefront error. For example, input shaped signals can be used. In some cases, the signals can be overdriven and/or underdriven, which can increase response time, and/or encourage settling of the interface.
Claims30
A liquid lens system comprising:
- a liquid lens comprising:
- a chamber;
- a first fluid contained in the chamber;
- a second fluid contained in the chamber;
- an interface between the first fluid and the second fluid;
- a plurality of driving electrodes insulated from the first and second fluids;
- and
- a common electrode in electrical communication with the first fluid, wherein a position of the interface is based at least in part on voltage differentials applied between the plurality of driving electrodes and the common electrode;
- a signal generator configured to apply the voltage differentials between the plurality of driving electrodes and the common electrode;
- a controller configured to:
- access angular velocity data indicative of an angular velocity of movement of the liquid lens;
- determine drive voltage signals at least in part by:
- applying positive gain values for a first angular velocity range;
- applying negative gain values for a second angular velocity range;
- and
- cause the signal generator to provide the drive voltage signals to one or more of the corresponding diving electrodes.
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A dynamic lens system comprising:
- a chamber containing an interface between a first fluid and a second fluid;
- a plurality of electrodes, wherein the interface is movable by applying drive signals to the plurality of electrodes;
- a signal generator configured to deliver the drive signals to the plurality of electrodes;
- and
- a controller configured to cause the signal generator to output input shaped drive signals to tilt the interface.
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A method for tilting an interface of a liquid lens, the method comprising:
- accessing target tilt information corresponding to target tilt amounts for the interface of the liquid lens, the liquid lens comprising:
- the interface between a first fluid and a second fluid;
- and
- a plurality of electrodes configured to control the interface;
- during a first time period, applying overdriven drive signals to the electrodes, wherein the overdriven drive signals correspond to tilt amounts larger than the target tilt amounts;
- and
- during a second time period, applying underdriven drive signals to the electrodes, wherein the underdriven drive signals correspond to tilt amounts lesser than the target tilt amounts.
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Dependencies are inferred from the claim text.