Apparatus for and method of ejecting ink of an ink-jet printer
AssigneeSamsung Electronics Co., Ltd.
InventorByung-Sun Ahn
Life of this patent
Estimating the term…
Abstract
An apparatus for ejecting ink in an ink-jet printer that ejects the ink out of the openings on the nozzle plate only by the vapor pressure of bubbles of gas generated on the surface of individual electrodes due to the electrolysis of the conductive ink by applying positive voltage to the individual electrodes wetted with the ink and negative voltage to a common electrode, without using a heater for heating the ink and a plurality of protective layers to protect the internal electrodes, thereby making it possible to realize a high speed printing operation for high frequency by a short impulse duration with low voltage.
Claims36
An apparatus for ejecting ink of an ink-jet printer, the apparatus comprising:
- a substrate;
- a first electrically insulating layer disposed upon said substrate;
- a first electrode layer disposed upon said first insulating layer, said first electrode layer containing at least one electrode;
- a second electrically insulating layer built upon said first electrode layer;
- a second electrode layer built upon said second electrically insulating layer, said second electrode layer containing at least one electrode opposing one of said electrodes from said first electrode layer;
- and
- a third insulating layer built upon said second electrode layer, said third insulating layer and said second electrode layer being perforated by a first orifice, said second electrically insulating layer being perforated by a second orifice, wherein oxygen bubbles are formed on said first electrode layer by an electrolysis of said ink when 0.1 amps or less current is applied to said first and said second electrode layers and wherein the potential difference between said first and said second electrode layers is 10 volts to 15 volts DC and wherein said current and voltage applied to said electrode layers are impulses of 2 microseconds to 4 microseconds in duration.
An apparatus for ejecting ink of an ink-jet printer, the apparatus comprising:
- a substrate;
- a first electrically insulating layer disposed upon said substrate;
- a first electrode layer disposed upon said first electrically insulating layer, said first electrode layer containing at least one electrode;
- a second electrically insulating layer built upon said first electrode layer;
- a second electrode layer built upon said second electrically insulating layer, said second electrode layer containing at least one electrode opposing one of said electrodes from said first electrode layer;
- a third electrically insulating layer built upon said second electrode layer;
- a circuit connected between said first electrode layer and said second electrode payer, said circuit applying 0.1 amps of electrical current or less to said first and second electrode layers and producing an electrolysis in said ink causing ejection of said ink through said second cylindrical orifice;
- and
- a nozzle plate built upon said third electrically insulating layer, said second electrically insulating layer, said third electrically insulating layer and said second electrode being perforated by a first cylindrical orifice having a first diameter, said first cylindrical orifice comprising an ink chamber, said nozzle plate being perforated by a second cylindrical orifice having a diameter smaller than said diameter of said first cylindrical orifice, said second cylindrical orifice being concentric to said first cylindrical orifice.
An apparatus for ejecting ink from an ink-jet printer via an electrolysis of said ink, said apparatus comprising:
- a substrate;
- a first electrically insulating layer disposed upon said substrate;
- a first electrode layer disposed upon said first insulating layer;
- a second electrically insulating layer built upon said first electrode layer;
- a second electrode layer built upon said second electrically insulating layer;
- and
- a third electrically insulating layer built upon said second electrode layer, said third electrically insulating layer and said second electrode layer being perforated by a first orifice, said second electrically insulating layer being perforated by a second orifice coaxially aligned to and bigger than said first orifice, wherein oxygen bubbles are formed on said first electrode layer by an electrolysis of said ink upon delivering an electrical impulse of power in an application of a current of 0.1 Amperes or less between said first electrode layer and said second electrode layer causing a droplet of ink to be ejected from said first orifice, said first electrode layer being positioned beneath all of said first orifice and all of said second orifice.
Dependencies are inferred from the claim text.