US Patent 10245584 Droplet ejecting apparatus

A droplet ejecting apparatus includes a plurality of nozzle groups each including a plurality of nozzles, a plurality of pressure chambers each configured to supply a solution to a corresponding nozzle of a nozzle group in the plurality of nozzle groups, a plurality of actuators each configured to cause a pressure change in a corresponding pressure chamber in the plurality of pressure chambers to control an ejection of a droplet of the solution from the corresponding nozzle, and a solution holding container having a solution inlet for receiving solution and a solution outlet, the solution holding container being configured to supply the solution to the plurality of nozzle groups via the plurality of pressure chambers.