Patent ID: 6629741
Filing Date: 2003-10-07
Classification: B41J

Abstract:
An ink jet recording head drive method comprising:applying a drive voltage to an electro-mechanical converter which changes a pressure within a pressure generation chamber filled with ink so that an ink droplet is ejected from a nozzle opening communicating with the pressure generation chamber, wherein the drive voltage has a voltage waveform including a first voltage change process for increasing a volume of the pressure generation chamber so as to pull the ink meniscus from the nozzle opening toward the pressure generation chamber and a second voltage change process for decreasing the volume of the pressure generation chamber so as to eject the ink droplet; and the first voltage change process is preceded by a preparatory voltage change process for pulling the ink meniscus from the nozzle opening toward the pressure generation chamber to a lesser degree than that of the first voltage change process.