PIEZOELECTRIC ACTUATOR WITH CAPACITANCE SENSING FOR OPTICAL POWER CONTROL
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United States of America
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Issued Date -
Mar 6, 2025
app pub date -
Jul 18, 2024
filing date -
Jul 18, 2024
priority date (Note) -
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Abstract
A method of operating a tunable lens includes determining a relationship between the optical power of a tunable lens and the capacitance of a piezoelectric element configured to deform the tunable lens, measuring the capacitance of the piezoelectric element, and applying a driving voltage to the piezoelectric element based on the measured capacitance to induce a desired optical power in the tunable lens.
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