Patent ID: 7637583

Claim:
A method for producing a liquid-jet head, the liquid-jet head including a drive IC and a pressure generating element for ejecting a liquid within a pressure generating chamber through a nozzle orifice, the liquid-jet head selectively forms a large dot upon selection of a plurality of pulse signals from plural pulse signals generated within one recording cycle, and selectively forms a small dot upon selection of a smaller number of the pulse signals than the number of the plurality of the pulse signals for the large dot, the pulse signal having an ejection step of contracting the pressure generating chamber to eject a liquid droplet through the nozzle orifice, and a vibration damping step of expanding the pressure generating chamber with a predetermined timing after the ejection step to damp vibration of the liquid within the pressure generating chamber after ejection, the method comprising: a measurement step of setting on the drive IC a first drive waveform, as the pulse signal, and a first drive voltage such that the large dot of a desired size can be formed, and measuring a size of the small dot with use of the first drive waveform and the first drive voltage; and a correction step of setting on the drive IC a second drive waveform whose waveform corresponding to the vibration damping step has been adjusted in a direction in which the large dot becomes small, and also setting on the drive IC a second drive voltage which is higher than the first drive voltage, when the measured size of the small dot is smaller than a predetermined size, and setting on the drive IC a second drive waveform whose waveform corresponding to the vibration damping step has been adjusted in a direction in which the large dot becomes large, and also setting on the drive IC a second drive voltage which is lower than the first drive voltage, when the measured size of the small dot is larger than the predetermined size.