INKJET HEAD, INKJET DEVICE, AND EJECTION METHOD OF INK

PROBLEM TO BE SOLVED: To provide an inkjet head which can stably eject ink droplets at high energy efficiency by a high frequency even if the ink has high viscosity, and to provide an ejection method of ink. SOLUTION: The inkjet head has an ink chamber and a pressure chamber which store the ink, an ink channel which connects the ink chamber and the pressure chamber with each other, a nozzle which communicates with the pressure chamber, a first actuator which applies pressure to the ink in the pressure chamber, and a second actuator which changes a cross sectional area of the ink channel. In the inkjet head, the second actuator reduces an inner diameter of the ink channel when the first actuator applies the pressure to the ink in the pressure chamber. Accordingly, the inkjet head can eject ink droplets at high energy efficiency. COPYRIGHT: (C)2011,JPO&INPIT