Patent ID: 11919302
Assignee: BROTHER KOGYO KABUSHIKI KAISHA
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B  G | IPC B  G

Claim 13:
14. A head comprising:
a piezoelectric member configured to be deformed in order to discharge a liquid from a nozzle;
an individual electrode formed in the piezoelectric member;
a first common electrode formed in the piezoelectric member;
a second common electrode formed in the piezoelectric member, a voltage to be applied to the second common electrode being different from a voltage to be applied to the first common electrode; and
a detection circuit configured to detect a capacitance of a first capacitor configured by the piezoelectric member, the individual electrode, and the first common electrode and a second capacitor configured by the piezoelectric member, the individual electrode, and the second common electrode, wherein:
the detection circuit includes an oscillation circuit configured to be connected to the individual electrode.