Patent ID: 11867498
Assignee: PIXART IMAGING INC.
Field: Chemical engineering (Chemistry)
Classification: CPC B  G | IPC B  G

Claim 0:
1. A sprayer comprising a detection unit for determining when a liquid level of the sprayer falls below a specific level, the sprayer comprising:
a container arranged to contain a liquid;
a passage comprising a transparent window, a first opening, a second opening and a resonator, wherein when the liquid in the container is passed through the resonator via the first opening, the liquid is emitted as a gas via the second opening; and
a detection unit disposed outside of the passage below the first opening, and comprising:
a light source disposed opposite to the second opening to emit light through the light transparent window for illuminating the gas in the passage such that the gas will reflect the emitted light;
an optical sensor disposed opposite to the second opening to detect a parameter of the reflected light through the transparent window; and
a processor coupled to the optical sensor for stopping the resonator from generating the gas when the parameter of the reflected light is below a first threshold corresponding to the specific level.