Liquid droplet ejecting head, liquid droplet ejecting device, and image forming apparatus

A liquid droplet ejecting head comprising sequentially in a laminated manner:

• a nozzle substrate including a plurality of nozzles;
• an ink tank substrate including
• a plurality of ink tanks respectively communicating with the nozzles,
• vibration plates each forming a part of each ink tank, and
• a plurality of electromechanical converting elements integrally formed with the vibration plates, respectively so as to correspond to the ink tanks, respectively;
• a liquid supply substrate including a plurality of liquid supply paths respectively supplying a liquid to the ink tanks;
• and
• a frame substrate including common ink tanks communicating with each liquid supply path,
• wherein
• an electrode of a driving circuit member driving the electro-mechanical converting elements is connected to each electrode of the plurality of the electro-mechanical converting elements through an interconnection member;
• the nozzle substrate is formed so that at least three or more nozzle rows, each nozzle row including the plurality of nozzles, are arranged in a direction intersecting a longitudinal direction of the nozzle row;
• the driving circuit member is provided to oppose to an outer surface of the frame substrate so as to correspond to a region between two adjacent nozzle rows located at the 4N+2-th position and the 4N+3-th position (N is 0 or a natural number) in an arrangement direction among the plurality of nozzle rows arranged in the direction intersecting the longitudinal direction of the nozzle row;
• and
• the driving circuit member is commonly used
• to drive the electro-mechanical converting element used for the two nozzle rows and
• to drive the electro-mechanical converting element used for another one or two nozzle rows adjacent to at least one of the two nozzle rows.