Abstract: An apparatus and method of forming a pattern using an inkjet printing method and nano imprinting method. The method includes partially inkjet printing a material for forming the pattern on a surface of the substrate using an inkjet head, and forming a predetermined pattern by imprinting the inkjet printed material on the surface of the substrate using an imprint mold. The method also includes partially inkjet printing a material for forming the pattern in an imprint mold using an inkjet head, and forming a predetermined pattern by imprinting the material on a surface of the substrate using the imprint mold. During the partial inkjet printing, at least two materials that are different from each other are inkjet printed on different locations of the surface of the substrate.

Abstract: An electrostatic latent image forming medium includes a frame, an imaging surface on which an electrostatic latent image is to be formed, the imaging surface being supported by the frame, and an alteration mechanism for altering the electrostatic latent image on the imaging surface, the alteration mechanism being between the frame and the imaging surface. When signals are selectively applied to the alteration mechanism, an electrostatic latent image with a potential different from a potential of its surrounding area is formed on the imaging surface.

Abstract: An apparatus and method of fabricating a color filter using an ink-jet technique includes inclining an ink-jet head having a plurality of nozzles at a predetermined angle, moving the ink-jet head in a lengthwise direction of the color filter that is divided into a plurality of working regions, ejecting color ink into a plurality of pixels, moving the ink-jet head to the other adjacent working region after a work in a predetermined working region is completed, and ejecting color ink, wherein the ink-jet head is symmetrically arranged with its mirror-image in adjacent working regions and thereby ejecting the color ink.

Abstract: A piezo-electric type page width inkjet printhead includes an intermediate substrate that includes a pressure chamber to be filled with ink to be ejected, a manifold connected to an ink entrance hole to store ink that flows in through the ink entrance hole, a restrictor to connect the manifold to one end of the pressure chamber, and a damper formed through the intermediate substrate corresponding to the other end of the pressure chamber, a lower substrate including a nozzle formed through a portion of the lower substrate, which corresponds to the damper, to eject the ink, an upper substrate formed on the intermediate substrate to seal an upper side of the pressure chamber, and a piezoelectric actuator formed on the upper substrate to generate a driving power to the pressure chamber to eject the ink through the nozzle, wherein the intermediate substrate comprises a both-sided copper clad laminate plate comprising an upper copper film and a lower copper film that are respectively formed on top and bottom surfac

Abstract: A method and apparatus to check an operation of a piezoelectric inkjet head includes a first current detection unit to detect a first current output from a piezoelectric element of the piezoelectric inkjet head when a predetermined voltage is applied, a second current detection unit to detect a second current from a capacitor having a capacitance with the same magnitude as a capacitor component of the piezoelectric element when the voltage is applied to the capacitor, and a third current detection unit to detect a third current corresponding to a difference between the first current and the second current, as the amount of deformation of the piezoelectric element according to the application of the voltage.

Abstract: A monolithic ink-jet printhead, and a method of manufacturing the same, includes a substrate having an ink chamber, an ink channel, and a manifold, a nozzle plate formed on the substrate, a nozzle, a heater, and a conductor. The ink chamber includes sidewalls formed to a predetermined depth from the front surface of the substrate for defining side surfaces of the ink chamber and a bottom wall formed parallel to the front surface of the substrate at the predetermined depth from the front surface of the substrate for defining a bottom surface of the ink chamber. The nozzle plate includes a plurality of passivation layers, a heat dissipating layer being stacked on the passivation layers, and the nozzle for ejecting ink out of the printhead. The heater is positioned above the ink chamber and heats ink in the ink chamber and the conductor delivers a current to the heater.

Abstract: An optical shutter includes a cell having a transparent panel and a hydrophobic transparent insulation panel which are arranged to face each other, a transparent electrode formed on an outer surface of the hydrophobic transparent insulation panel, and an opaque droplet contained in the cell and contacting an inner surface of the hydrophobic transparent insulation panel, wherein the amount of light transmitted is adjusted by changing a contact angle of the opaque droplet with respect to the hydrophobic transparent insulation panel. The opaque droplet may be hydrophobic or hydrophilic. The contact angle of the opaque droplet may be changed by applying an electric field between the transparent electrode and the opaque droplet.

Abstract: A method of ejecting ink from a ink-jet printhead includes filling a rear end of a nozzle with ink using a capillary force, the rear end of the nozzle being surrounded by a hydrophilic layer, forming an electric field directed toward an outlet of the nozzle on a front end of the nozzle, the front end of the nozzle being surrounded by a hydrophobic layer, varying a surface tension of ink to separate ink droplets having a predetermined volume from ink and to move the separated ink droplets within the front end of the nozzle toward the outlet of the nozzle, and ejecting the separated ink droplets through the outlet of the nozzle.

Abstract: A method of ejecting ink from a ink-jet printhead includes filling a rear end of a nozzle with ink using a capillary force, the rear end of the nozzle being surrounded by a hydrophilic layer, forming an electric field directed toward an outlet of the nozzle on a front end of the nozzle, the front end of the nozzle being surrounded by a hydrophobic layer, varying a surface tension of ink to separate ink droplets having a predetermined volume from ink and to move the separated ink droplets within the front end of the nozzle toward the outlet of the nozzle, and ejecting the separated ink droplets through the outlet of the nozzle.

Abstract: A thermally-driven ink-jet printhead includes a substrate having an ink chamber to be filled with ink to be ejected, a manifold for supplying ink, and an ink channel for providing flow communication therebetween. First and second sidewalls are formed to a predetermined depth from an upper surface of the substrate and define the ink chamber to have a substantially rectangular shape. A nozzle plate including a plurality of material layers is formed on the substrate. A nozzle passes through the nozzle plate and is in flow communication with the ink chamber. A heater is disposed between the nozzle and one of the first sidewalls above the ink chamber. A conductor is electrically connected to the heater. The conductor and the heater are disposed within the nozzle plate. A shifting feature moves cavitation points beyond an outer edge of the heater.

Abstract: A method of manufacturing a color filter forming a black matrix on a substrate, the black matrix defining a plurality of pixels, forming liquid ink layers within the pixels and drying the liquid ink layers, penetrating solvent vapor into surfaces of the dried liquid ink layers to form ink layers have mobile surfaces, and drying the ink layers having the mobile surfaces.

Abstract: A method of manufacturing a black matrix of a color filter includes forming a light-shielding layer of a hydrophobic organic material on a surface of a transparent substrate, forming a blocking layer of a fluorinated resin on a top surface of the light-shielding layer, patterning the light-shielding layer and the blocking layer to form the black matrix, the black matrix having a top surface formed with the blocking layer, and heating the black matrix formed with the blocking layer and irradiating UV light towards an upper portion of the black matrix.

Abstract: An apparatus to fabricate a color filter includes an inkjet head movably installed over a substrate on which a plurality of pixels are formed to discharge ink of predetermined colors into the pixels, and a porous member movably installed over the pixels filled with the ink discharged from the inkjet head to form a solvent ambient around the ink filled within the pixels due to evaporation of a solvent filled in the porous member to reduce a drying speed of the ink.

Abstract: A black matrix used with color filters and a method of manufacturing the black matrix. The black matrix is formed on a substrate and defines a plurality of pixel regions. The black matrix has an ink-phobic upper surface having a plurality of nano-sized grooves formed therein, and ink-philic lateral surfaces.

Abstract: A monolithic ink-jet printhead, and a method of manufacturing the same, includes a substrate having an ink chamber, an ink channel, and a manifold, a nozzle plate formed on the substrate, a nozzle, a heater, and a conductor. The ink chamber includes sidewalls formed to a predetermined depth from the front surface of the substrate for defining side surfaces of the ink chamber and a bottom wall formed parallel to the front surface of the substrate at the predetermined depth from the front surface of the substrate for defining a bottom surface of the ink chamber. The nozzle plate includes a plurality of passivation layers, a heat dissipating layer being stacked on the passivation layers, and the nozzle for ejecting ink out of the printhead. The heater is positioned above the ink chamber and heats ink in the ink chamber and the conductor delivers a current to the heater.

Abstract: A method of expelling a fluid includes filling a nozzle with a fluid using a capillary force, generating an ion wind by ionizing air near an outlet of the nozzle, and expelling the fluid from the nozzle as the ion wind decreases a pressure around the outlet of the nozzle. An ink-jet printhead utilizing the method includes a manifold formed in a passageway plate to supply ink, a nozzle to be supplied with ink formed in a nozzle plate provided on the passageway plate, and a ground electrode and a source electrode arranged near an outlet of the nozzle, the ground electrode and the source electrode forming an electric field due to an application of a voltage thereto and ionizing air near the outlet of the nozzle to produce an ion wind to decrease a pressure near the outlet of the nozzle to expel the ink contained in the nozzle.

Abstract: A thermally-driven ink-jet printhead includes a substrate having an ink chamber to be filled with ink to be ejected, a manifold for supplying ink, and an ink channel for providing flow communication therebetween. First and second sidewalls are formed to a predetermined depth from an upper surface of the substrate and define the ink chamber to have a substantially rectangular shape. A nozzle plate including a plurality of material layers is formed on the substrate. A nozzle passes through the nozzle plate and is in flow communication with the ink chamber. A heater is disposed between the nozzle and one of the first sidewalls above the ink chamber. A conductor is electrically connected to the heater. The conductor and the heater are disposed within the nozzle plate. A shifting feature moves cavitation points beyond an outer edge of the heater.

Abstract: An ink-jet printhead includes a substrate having an ink chamber and a manifold, a nozzle plate formed on the substrate, first and second heaters and conductors, a material layer, and a plurality of ink channels. The nozzle plate includes a plurality of passivation layers formed of an insulating material, a heat dissipation layer formed on the plurality of passivation layers and made of a thermally conductive material, and a nozzle passing through the nozzle plate and in flow communication with the ink chamber. The first and second heaters and conductors are interposed between adjacent passivation layers of the nozzle plate. The material layer is interposed between the ink chamber and the manifold to form a bottom wall of the ink chamber and a top wall of the manifold. The plurality of ink channels is formed in the material layer to provide flow communication between the ink chamber and the manifold.

Abstract: A monolithic ink-jet printhead, and a method of manufacturing the same, includes a substrate having an ink chamber, an ink channel, and a manifold, a nozzle plate formed on the substrate, a nozzle, a heater, and a conductor. The ink chamber includes sidewalls formed to a predetermined depth from the front surface of the substrate for defining side surfaces of the ink chamber and a bottom wall formed parallel to the front surface of the substrate at the predetermined depth from the front surface of the substrate for defining a bottom surface of the ink chamber. The nozzle plate includes a plurality of passivation layers, a heat dissipating layer being stacked on the passivation layers, and the nozzle for ejecting ink out of the printhead. The heater is positioned above the ink chamber and heats ink in the ink chamber and the conductor delivers a current to the heater.

Abstract: An inkjet printhead and a method of fabricating a color filter with a uniform thickness. In the method, a transparent substrate is prepared, and a black matrix of a pixel pattern is formed on the transparent substrate. At least one pixel on the transparent substrate is selected, and an ink is ejected into the selected pixel in order to fabricate the color filter. The ejected ink is then promptly dried using a dryer.