A vibration device includes a light transmitter, a vibrator to vibrate the light transmitter, a driver to drive the vibrator, and a controller configured or programmed to control the driver and determine a high-frequency-band resonant frequency of the vibrator according to a state of the driver obtained by changing a drive frequency of the driver within a high frequency band higher than or equal to about 100 kHz, and estimate a temperature of the light transmitter from the determined high-frequency-band resonant frequency.
VIBRATION DEVICE AND VIBRATION METHOD
2024-10-24
Patent
Electronic Resource
English
IPC: | B08B Reinigen allgemein , CLEANING IN GENERAL / B60S SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR , Warten, Reinigen, Instandsetzen, Unterstützen, Anheben oder Rangieren von Fahrzeugen, soweit nicht anderweitig vorgesehen / G02B Optische Elemente, Systeme oder Geräte , OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS / H04N PICTORIAL COMMUNICATION, e.g. TELEVISION , Bildübertragung, z.B. Fernsehen |