LIQUID JET HEAD, LIQUID JET DEVICE AND METHOD FOR SETTING BIAS POTENTIAL OF LIQUID JET HEAD

摘要

PROBLEM TO BE SOLVED: To provide a liquid jet head which reduces variation in a discharge amount and reduces cost, a liquid jet device and a method for setting a bias potential of a liquid jet head.;SOLUTION: A liquid jet head includes a nozzle array 22 in which nozzles 21 for discharging a liquid are arranged side by side, a flow channel forming substrate provided with a pressure generating chamber, and a piezoelectric actuator 300 having a first electrode 60, a piezoelectric layer 70 and a second electrode 80 provided on one surface side of the flow channel forming substrate, in which the piezoelectric actuator includes active parts 310 sandwiched between the first electrode and the second electrode of the piezoelectric layer independently for each of the pressure generating chamber, any one of the first electrode and the second electrode is used as an individual electrode provided independently on each of the active parts, the other electrode of the first electrode and the second electrode is used as a common electrode provided commonly in the plurality of active parts, the common electrode is divided into two or more in the nozzle parallel arrangement direction in one nozzle array, which achieves reduction in variation of a discharge amount and reduction in cost.;SELECTED DRAWING: Figure 2;COPYRIGHT: (C)2020,JPO&INPIT