APPARATUS AND METHOD OF PRINTING INKJET

摘要

An inkjet apparatus and a method thereof are provided to control color volume of color droplets by level and duration time of voltage supplied to driving electrodes, thereby enlarging volume of color droplets. An inkjet apparatus comprises an injection head(122) including an injection nozzle(124) configured to inject a droplet on a substrate(1) with plurality of sub pixels(SP) at least once. The shape of the injection nozzle is equal to the shape of the sub pixels. The sizes of the injection nozzles and the sub pixels are same. A printing method of the inkjet apparatus includes the steps of: controlling at least one out of voltage level and duration time of a driving signal applied to driving electrodes, which overlaps with one another, with having a piezo-electric element in-between; and controlling volume of the droplets according to expansion amount of the piezo-electric element, which is expanded by at least one out of the voltage level and the duration time of the driving signal.