Patent ID: 11879766
Assignee: TOSHIBA TEC KABUSHIKI KAISHA
Field: Chemical engineering (Chemistry)
Classification: CPC G  B | IPC B  G

Claim 0:
1. A droplet dispensing apparatus, comprising:
a crystal sensor;
a vibration voltage generation unit configured to apply a vibration voltage to the crystal sensor;
a resonance frequency measuring unit configured to detect a resonance frequency of the crystal sensor; and
a controller configured to:
obtain the resonance frequency of the crystal sensor before droplets are discharged from a liquid dropping device,
control the liquid dropping device to discharge a liquid as droplets on to the crystal sensor,
obtain the resonance frequency of the crystal sensor on which droplets are adhered after the droplets are discharged from the liquid dropping device,
estimate a volatilization amount for the droplets during a first period of time beginning when the droplets are adhered to the crystal sensor, the volatilization amount being estimated based on a temporal change trend in the resonance frequency of the crystal sensor measured for a second period of time after the first period of time, and
calculate a weight of the droplets discharged from the liquid dropping device on to the crystal sensor based on the difference in resonance frequency of the crystal sensor before and after the droplets are discharged and the estimated volatilization amount.