Patent ID: 6431674
Filing Date: 2002-08-13
Classification: B41J

Abstract:
An ink jet recording apparatus having an ink-jet recording head including pressure generating chambers each communicatively connected to a nozzle opening and a reservoir, ink stored in said pressure generating chambers and said reservoirs and forming a meniscus at each of said nozzle openings, pressure generating means for pressurizing the pressure generating chambers to eject ink droplets selectively from said nozzle openings, and means for minutely vibrating a meniscus at each of said nozzle openings to an extent insufficient to eject an ink droplet, said ink jet recording apparatus comprising:a drive voltage generating circuit for generating a drive waveform, wherein said drive waveform contains a first drive waveform for minutely vibrating the meniscus and a second drive waveform for ejecting ink droplets during one print period; and a drive circuit selectively outputting at least one of a signal of said first drive waveform and a signal of said second drive waveform to said pressure generating means and said means for minutely vibrating the meniscus.