Nozzle drive control device and method

A computer-readable recording medium having embodied thereon a computer program for executing a nozzle drive control method, the 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.

A nozzle drive control device comprising:

• a power supply to apply a drive voltage to a nozzle to eject an ink droplet;
• an ink droplet sensor to sense a size or an ejecting speed of the ejected ink droplet;
• a determiner to determine whether the sensed size or ejecting speed of the ejected ink droplet is included within a predetermined range;
• and
• a controller to calculate a second drive voltage as the drive voltage when the determiner determines that the sensed size or ejecting speed of the ejected ink droplet is not included within the predetermined range and to repeatedly control the power supply, the ink droplet sensor, and the determiner to apply the second drive voltage to the nozzle to eject a second ink droplet, to sense a second size or ejection speed of the second ink droplet, and to determiner whether the size or ejection speed of the second ink droplet is included within the predetermined range, respectively.

A method to control a nozzle, the method comprising:

• applying a drive voltage to the nozzle to eject an ink droplet;
• detecting a size or an ejecting speed of the ejected ink droplet;
• determining whether the size or ejecting speed of the ejected ink droplet is within a predetermined range;
• and
• calculating a new drive voltage as the drive voltage to apply to the nozzle when the determined size or ejecting speed of the ejected ink droplet is not within the predetermined range, and repeating the applying of the drive voltage, the detecting a size or ejection speed, and the determining of whether the size or ejection speed of the ejected ink droplet is within the predetermined range until the detected size or ejection speed is within the predetermined range.