Patent ID: 7690743
Filing Date: 2010-04-06
Classification: B41J

Abstract:
1. A nozzle drive control method comprising: applying a drive voltage to a nozzle to eject an ink droplet; sensing a size or an ejecting speed of the ejected ink droplet; determining whether the sensed size or ejecting speed of the ink droplet is included within a predetermined range; and calculating a second drive voltage as the drive voltage when the sensed size or ejecting speed of the ejected ink droplet is not included within the predetermined range, to apply the second drive voltage to the nozzles to eject a second ink droplet, to sense a second size or second ejecting speed of the second ink droplet as the size or ejecting speed, and to determine whether the size or ejection speed of the second ink droplet is included within the predetermined range, wherein the determining of whether the sensed size or ejecting speed of the ink droplet is included within the predetermined range comprises using predetermined ranges corresponding to respective nozzles in an image forming apparatus having a plurality of nozzles.