Inkjet printing device and method of manufacturing display device using the same

An inkjet printing device comprising:

• a chamber storing ink;
• and
• a plurality of inkjet nozzles coupled to a bottom surface of the chamber and receiving the ink from the chamber, the inkjet nozzles being arranged in a plurality of columns along a first direction,
• wherein the inkjet nozzles comprise:
• a center column nozzle disposed adjacent to an imaginary centerline of the chamber, the imaginary centerline dividing a length of the chamber in the first direction into two halves;
• and
• an outer column nozzle disposed farther from the centerline than the center column nozzle,
• wherein the chamber comprises a bump portion disposed farther from the centerline than the outer column nozzle, and the bump portion comprises a bump, the bump having a circular arc shape in a cross-section,
• wherein the bump portion is recessed from the bottom surface of the chamber to an inside of the chamber, and each of the inkjet nozzles is protruded from the bottom surface of the chamber to an outside of the chamber, and
• wherein an extended height of the bump portion is less than a height of the chamber.