| 摘要 |
PURPOSE:To suppress the fluctuations of an ink emitting amt. by respectively applying forward and inverse electric fields to the piezoelectric materials forming two opposed side walls and successively supplying two kinds of voltage waveforms expanding and contracting each pressure chamber and correcting and controlling the voltage waveform of the inverse electric field contracting the pressure chamber. CONSTITUTION:A large number of pressure chambers 1 are parallelly arranged and one ends thereof are allowed to communicate with the respective nozzles 2 of the nozzle plate 4 provided to the end parts of the pressure chambers. Each of the pressure chambers 1 is formed from a top wall 44, a bottom wall 45 and side walls 5 to be formed into a passage having a rectangular cross section. Ink is supplied to the other end of each pressure chamber 1 from the supply part 64 arranged to the top wall 44. A drive signal is applied from a drive circuit through each lead-out electrode 60. Forward and inverse electric fields are respectively applied to the piezoelectric materials forming two opposed side walls 5 and two kinds of voltage waveforms expanding and contracting each pressure chamber are successively supplied to each pressure chamber. At this time, the voltage waveform of the inverse electric field contracting the pressure chamber 1 is controlled by the control means connected to an ink emitting amt. correction means. |
