Droplet discharge head, droplet discharge device, and droplet discharge control method of droplet discharge device

A droplet discharge control method of a droplet discharge device including

• a droplet discharge head having
• a nozzle configured to discharge the liquid,
• a liquid chamber communicated with the nozzle,
• an inflow channel configured to supply the liquid chamber with the liquid,
• a vibrating plate constituting a part of a wall surface of the liquid chamber, and
• an actuator which can extend and contract to apply pressure to the liquid chamber via the vibrating plate,
• a first tank configured to supply the liquid to the droplet discharge head via the inflow channel,
• a conveying mechanism configured to move the droplet discharge head and a recording medium relatively to each other, and
• a control section configured to control the droplet discharge head and the conveying mechanism, the method comprising:
• an initial state forming step of making, by the control section, a tip part of the actuator has contact with the vibrating plate, and the actuator push the vibrating plate toward a first direction defining a direction in which the vibrating plate is displaced so as to decrease a capacity of the liquid chamber as the first direction, and a direction in which the vibrating plate is displaced so as to increase the capacity of the liquid chamber as a second direction;
• a pull-in step of making, by the control section, the tip part of the actuator displaces the vibrating plate toward the second direction in a state of having contact with the vibrating plate to thereby pull in a meniscus in the nozzle toward the liquid chamber compared to the meniscus in the nozzle in the initial state forming step;
• a separation step of separating, by the control section, the tip part of the actuator from the vibrating plate to further displace the vibrating plate toward the second direction;
• and
• a discharge step of making, by the control section, the tip part of the actuator collides with the vibrating plate to thereby displace the vibrating plate toward the first direction to discharge the liquid from the nozzle.