| 摘要 |
A drive signal includes a first drive pulse that causes liquid droplets to be ejected from nozzles and a second drive pulse that causes liquid droplets of a different size to those of the first drive pulse to be ejected from the nozzles; the first drive pulse and the second drive pulse have at least an expansion element that causes a pressure chamber to expand by changing from a standard potential, which is a standard for changes in potential, to an expansion potential, and a contraction element that causes the expanded pressure chamber to contract by changing from a potential that is on an expansion potential side of the standard potential to a contraction potential that exceeds the standard potential thereby ejecting the liquid; and an initiation potential of the contraction element of the first drive pulse and an initiation potential of the contraction element of the second drive pulse are made to be uniform at the same potential. |
