OPTICAL SCANNING DEVICE
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United States of America Patent
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Issued Date -
Jun 1, 2023
app pub date -
Mar 19, 2021
filing date -
May 25, 2020
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Abstract
An optical scanning device includes an optical deflector, a driving unit, and a detection unit. The optical deflector has a mirror part and an H actuator. The driving unit supplies both of a first driving voltage and a second driving voltage to a first set of piezoelectric divided sections and a second set of piezoelectric divided sections of the H actuator during a first driving period, and supplies the driving voltage only to one set out of the first set and the second set of piezoelectric divided sections during a second driving period. The detection unit detects a deflection angle γ based on the output voltage of the other set of piezoelectric divided sections during the second driving period.
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