Patent ID: 8797373

Claim:
A liquid droplet ejecting method, the method comprising: applying a vibration to a liquid in a liquid column resonance-generating liquid chamber, in which an ejection hole is formed, to form a standing wave through liquid column resonance; wherein the vibration applied to the liquid has a frequency f satisfying Equation (2): N×c /(4 L )≦ f≦N×c /(4 Le ) (2); L represents a length of the liquid column resonance-generating liquid chamber in a longitudinal direction thereof; Le represents a distance between an end of the liquid column resonance-generating liquid chamber on a liquid feed path side and a center part of the ejection hole nearest to the end of the liquid column resonance-generating liquid chamber; c represents a sound speed of the liquid; and N is a natural number; and wherein the Le and L satisfy Le/L>0.6; and ejecting the liquid from the ejection hole, which is formed in a region corresponding to an antinode of the standing wave, to form liquid droplets.