Droplet discharge head, droplet discharge apparatus, and method for discharge control in droplet discharge head

A discharge control method for a liquid discharge head including:

• a nozzle discharging a liquid as a droplet;
• a discharge room having a diaphragm and disposed in a channel of the liquid, the channel communicating with the nozzle, the diaphragm pressurizing the liquid by being displaced and being a part of the discharge room;
• and a fixed electrode facing the diaphragm and generating electrostatic force with respect to the diaphragm by receiving electric charge so as to displace the diaphragm by bringing the diaphragm into contact with and detaching the diaphragm from the fixed electrode, the fixed electrode including a first fixed electrode received the electric charge from an outside and a second fixed electrode that is made of a material different from a material of the first fixed electrode and received the electric charge through the first fixed electrode, the method comprising:
• controlling a time during which a voltage is applied by supplying electric charge to the fixed electrode, so that an area of contact of the diaphragm with the fixed electrode is changed.