Patent ID: 7862135

Claim:
A method of driving a liquid ejecting head that varies pressure of a liquid in a pressure-generating chamber as a result of operating a pressure-generating element by supplying an ejection pulse, to eject liquid drops from a nozzle opening due to the pressure variation, the method comprising: performing expansion in which the pressure-generating chamber is expanded, wherein a time of the expansion is greater than or equal to a natural vibration period Ta of the pressure-generating element, performing a first contraction after performing the expansion in which the liquid drops are ejected from the nozzle opening as a result of contracting the pressure-generating chamber; and performing a second contraction in which the pressure-generating chamber is contracted after the ejection of the liquid drops, wherein a time from a start of the first contraction to a start of the second contraction is between Â¼ to Â¾ of a Helmholtz vibration period Tc of the pressure-generating chamber, and wherein a time of the first contraction is less than or equal to a natural vibration period Ta of the pressure-generating element.