Patent ID: 7287821

Claim:
A liquid jetting device, comprising: a recording head including a jetting energy generating element to generate a liquid jetting energy for making a nozzle jet liquid; a drive circuit to generate a drive signal for driving the jetting energy generating element; a liquid detection sensor to detect a jetting characteristic value of the liquid jetted from the nozzle; a drive voltage adjustment unit to adjust a voltage value of the drive signal of the drive circuit; and a control unit to control the drive circuit, the liquid detection sensor and the drive voltage adjustment unit, wherein the control unit controls the drive voltage adjustment unit and the drive circuit so that the liquid is jetted from the nozzle, and creates a correction data from the jetting characteristic value of the jetted liquid detected by the liquid detection sensor; and the control unit controls the drive voltage adjustment unit and the drive circuit so that the voltage value of the drive signal is corrected based on a value which is obtained by multiplying the correction data by a convergence coefficient within a range of from 0.50 or more to less than 1.00, and the control unit repeats correcting the voltage value until a detection result of the liquid which was jetted based on the drive signal after the correction by the liquid detection sensor becomes a target value.