Abstract: Disclosed is a printing apparatus for a 3D surface, which performs printing by ejecting a droplet onto a 3D surface and controlling an electric field on an impact path of the droplet, the printing apparatus including: a ejecting environment information provider configured to provide ejecting environment information between a nozzle and an impact point; and a controller configured to predict a result of printing on an actual substrate by accumulating previous printing results according to printing conditions and the ejecting environment information into a database, and perform the printing on the 3D surface while changing the printing conditions provided by the database based on the ejecting environment information provided by the ejecting environment information provider.

Abstract: The present disclosure relates to an electrohydrodynamic jet printing apparatus and a method for controlling printing of the electrohydrodynamic jet printing apparatus. The electrohydrodynamic jet printing apparatus according to the present disclosure includes a nozzle that ejects supplied ink as a droplet towards a substrate; an electrode that is formed on the nozzle to form an electric field between the nozzle and the substrate by an applied voltage; a voltage supplier that applies the voltage to the electrode; and a controller that controls the voltage supplier, the controller controlling in real time the voltage being applied from the voltage supplier to the electrode such that a size of the droplet being ejected from the nozzle is constant.

Abstract: The present disclosure relates to a 3D surface printing apparatus for the edge area of substrate, the apparatus including a jig part that erects the substrate and immobilizes it, a nozzle part that comprises a nozzle that ejects ink through Electrohydrodynamic (EHD) jetting by applying a voltage to an electrode, from above the erected substrate; a moving part that moves the nozzle left and right; and a control part that controls a printing operation, wherein the moving part prints a pattern that is continuously connected along a front surface of the rim of the substrate, a side surface of the substrate and a rear surface of the rim of the substrate as it horizontally moves the nozzle, and the control part controls the printing operation, considering changes in 3D electric field distribution.

Abstract: Disclosed is a printing apparatus for a 3D surface, which performs printing by ejecting a droplet onto a 3D surface and controlling an electric field on an impact path of the droplet, the printing apparatus including: a ejecting environment information provider configured to provide ejecting environment information between a nozzle and an impact point; and a controller configured to predict a result of printing on an actual substrate by accumulating previous printing results according to printing conditions and the ejecting environment information into a database, and perform the printing on the 3D surface while changing the printing conditions provided by the database based on the ejecting environment information provided by the ejecting environment information provider.

Abstract: Disclosed is an inkjet printhead. The inkjet printhead with a plurality of nozzles to eject a liquid solution by an electrohydrodynamic method includes: a first electrode formed for each of the plurality of nozzles and applied with a voltage for ejecting the liquid solution by the electrohydrodynamic method; a first voltage controller configured to apply the voltage to the first electrode; and a second electrode placed between and spaced apart from the first electrodes formed in the nozzles and grounded to inhibit electric field interference between the nozzles.

Abstract: Disclosed is a printing apparatus for a 3D surface, which performs printing by ejecting a droplet onto a 3D surface and controlling an electric field on an impact path of the droplet, the printing apparatus including: a ejecting environment information provider configured to provide ejecting environment information between a nozzle and an impact point; and a controller configured to predict a result of printing on an actual substrate by accumulating previous printing results according to printing conditions and the ejecting environment information into a database, and perform the printing on the 3D surface while changing the printing conditions provided by the database based on the ejecting environment information provided by the ejecting environment information provider.

Abstract: There is disclosed an apparatus for spraying and patterning, using an electrostatic force, includes a nozzle to which a voltage is applied to exhaust ink, a droplet circulation chamber provided in one end of the nozzle, with a hole provided in one end to spray the ink exhausted from the nozzle based on a particle size of the droplet and to temporarily collect the not-sprayed ink, and a substrate for impacting the ink sprayed from the hole thereon by forming an electric field between the nozzle and the substrate.

Abstract: Provided herein is a coating system using a spray nozzle, the coating system comprising: a support where a substrate is disposed; a spray nozzle configured to inject towards the substrate liquid that has gone through a primary atomization by collision with gas; a voltage applier configured to apply voltage to the spray nozzle so that the liquid injected from the spray nozzle includes electric charge, and to generate an electric field between the support and the spray nozzle by the voltage applied to the spray nozzle and perform a secondary atomization of the liquid injected from the spray nozzle; and a transferrer configured to transfer at least one of the support and the spray nozzle.

Abstract: There is disclosed an apparatus for spraying and patterning, using an electrostatic force, includes a nozzle to which a voltage is applied to exhaust ink, a droplet circulation chamber provided in one end of the nozzle, with a hole provided in one end to spray the ink exhausted from the nozzle based on a particle size of the droplet and to temporarily collect the not-sprayed ink, and a substrate for impacting the ink sprayed from the hole thereon by forming an electric field between the nozzle and the substrate.

Abstract: Provided herein is a spray nozzle and a coating system using the same, the spray nozzle and the coating system comprising a liquid nozzle injecting liquid towards a substrate; a gas nozzle for injecting gas to collide with the liquid on an injection path of the liquid to perform a primary atomization of the liquid; and a voltage supply connected to the liquid nozzle, the voltage supply for applying voltage to the liquid nozzle to generate an electric field between the liquid nozzle and substrate to perform a secondary atomization of the liquid.