Patent ID: 6739686
Filing Date: 2004-05-25
Classification: B41J

Abstract:
An ink ejecting device that ejects ink, the ink ejecting device comprising:a print head including a plurality of pressure chambers, actuators, and nozzles in a one-to-one correspondence with each other, each pressure chamber being in fluid communication with a corresponding nozzle and filled with ink, the actuators generating energy upon application of voltage to eject ink from the corresponding pressure chamber through the corresponding nozzle; a scanning mechanism that moves the print head to scan in consecutive rows; a drive circuit that applies voltage to the actuators; and a controller that controls the drive circuit to apply voltage selectively to the actuators to drive the print head to perform consecutive ejection operations while the scanning mechanism scans the print head in each row, the controller generating, in order to compensate for pressure fluctuations in the pressure chambers, drive waveforms used by the drive circuit for each of a predetermined number of ejection operations from the start of each row that the scanning mechanism scans the print head, the controller generating drive waveforms depending on which of the predetermined number of ejection operations is to be performed next in a present row.