Abstract: An array inkjet printhead includes a substrate including an ink chamber to store ink to be ejected, a heater to apply heat to the ink, a TFT (thin film transistor) to control a voltage supplied to the heater, and a manifold to supply ink to the ink chamber, the ink chamber, the heater, and the TFT being formed in a top surface of the substrate, a nozzle plate formed on the substrate and including a plurality of nozzles through which the ink is ejected when the heater applies heat to the ink, and a driving unit to drive the TFT to make the heater generate the heat to eject the ink.

Abstract: A thermal inkjet printhead includes a substrate, an insulation layer formed on the substrate, a heater formed on the insulation layer, a conductor formed on the heater to supply a current to the heater, a chamber layer stacked on the insulation layer having the heater and the conductor therebetween, and having an ink chamber to be filled with ink to be ejected formed therein; a nozzle layer stacked on the chamber layer and having a nozzle through which the ink in the ink chamber is to be ejected, and a plurality of thermal plugs formed in a lower portion of the insulation layer to contact the insulation layer and the substrate and to dissipate heat generated by the heater toward the substrate.

Abstract: A head driving device, an inkjet printer comprising the same and data processing method of an ink jet printer are provided, in which a nozzle driving unit turns on/off a plurality of thermal elements that correspond to a plurality of nozzles and heat ink discharged from the nozzles, a data processing unit processes printing data and outputs a nozzle select signal corresponding to an image to the nozzle driving unit; and a head logic unit receives the printing data externally, divides the printing data of one address group into a plurality of data groups, transmits the plurality of data groups to the data processing unit via different data buses corresponding to the plurality of data groups, respectively, and controls the data processing unit to process the divided printing data. Accordingly, an EMI characteristic between signals can be improved by lowering the data buses density in one area, and a data processing speed can be adjusted by dividedly processing printing data.

Abstract: A method of fabricating a high efficiency inkjet print head includes forming an oxide film on a surface of a substrate, sequentially forming and patterning a heater layer and a wiring layer on the oxide film, forming a passivation layer on the heater layer and the wiring layer and patterning the passivation layer so that a heater is exposed, etching the substrate to form restrictors at both sides of the heater, forming a chamber layer on the passivation layer, forming a sacrificial layer on the chamber layer and polishing the sacrificial layer, forming a nozzle layer on the chamber layer, forming an ink-feed hole at a bottom surface of the substrate, and removing the sacrificial layer. The inkjet print head is capable of reducing energy consumption by fabricating a heater having high efficiency, and capable of maintaining good heating characteristics since an original temperature of the inkjet print head is rapidly recovered after the heater is instantly heated and electric current is not supplied.

Abstract: An inkjet printer head includes a substrate having a manifold and an ink channel to supply ink, a nozzle plate formed on the substrate, a chamber formed between the substrate and the nozzle plate and extending toward the substrate and the nozzle plate, an electrode formed at an interface between the substrate and the nozzle plate and around the chamber, and a heater having both ends extending in contact with the electrode to be suspended on the chamber in direct contact with the ink and to generate bubbles from both surfaces thereof. The inkjet printer head is capable of improving manufacturing process efficiency by omitting a process of separately forming a heater passivation layer, operating the heater at low electric power by omitting the heater passivation layer, improving integrity of a nozzle by lowering a working voltage, and improving reliability in manufacturing processes by locating the suspended heater to be in parallel with the substrate and the electrode.

Abstract: A filter plate usable with an ink jet head, an ink jet head with the filter plate, and a method of fabricating the filter plate are provided. The filter plate includes a filter substrate having a filter hole region. Filter holes having angled line shapes extend through the filter substrate of the filter hole region. Each of the filter holes may include an upper filter hole formed to have a first angle with respect to the filter substrate at an upper portion of the filter substrate, and a lower filter hole formed at a lower portion of the filter substrate to be connected to the upper filter hole and having a second angle with respect to the filter substrate different from the first angle.

Abstract: An inkjet printer head and method of fabricating the same includes a substrate having an ink-feed hole formed at a bottom surface of the substrate, a lower chamber formed at a top surface of the substrate, and a restrictor to fluid communicate between the ink-feed hole and the lower chamber, an oxide layer formed on the substrate, a heater formed on the oxide layer and disposed parallel to the surface of the substrate to cross the lower chamber, a lead electrically connected to the heater, and a nozzle layer disposed on the heater to configure an ink channel together with the lower chamber and having a nozzle at an upper portion of the nozzle layer. The inkjet printer head is capable of improving a thermal efficiency by heating the ink using both surfaces of the heater since the heater is disposed at a center of the ink chamber, and improving characteristics of the heater by making a current density and a current flow uniform since the heater is formed in a straight line without any bent or curved portion.

Abstract: An inkjet printer head includes a substrate having an ink-feed hole to supply ink stored in a cartridge to an ink chamber and a restrictor in fluid communication with the ink chamber, an oxide layer formed on the substrate, a heater disposed on the oxide layer above the restrictor and having fixed parts disposed on the oxide layer, slopes extending upward and away from the restrictor at an incline, and a parallel part extending between the slopes parallel to the substrate, a lead formed to be in electrical contact with the heater, a chamber layer formed to cover the lead and to define the ink chamber, and a nozzle layer formed on the chamber layer and having a nozzle. In the inkjet printer head, the lifespan of the heater may be extended since the heater is supported by the slopes, which function as a shock absorbing member when ink supply pressure or cavitation force is applied to a surface of the heater.

Abstract: An inkjet print head with a high efficiency heater includes a substrate having an ink-feed hole extending therethrough to receive ink stored in a cartridge, a flow path layer to define an ink chamber in fluid communication with the ink-feed hole, a nozzle plate having a nozzle to discharge the ink from the ink chamber to an exterior, a heater located adjacent to an inner wall of the ink chamber and disposed in contact with the ink in the ink chamber, and a lead electrically connected to the heater. The heater increases thermal efficiency and maintains a stable structure. In addition, since the heater is disposed adjacent to the inner wall of the ink chamber, the heater is barely affected by the ink supply pressure or the cavitation force that results from ink bubbles shrinking.

Abstract: A print head driving apparatus capable of enhancing integration of a semiconductor circuit board in which the print head driving apparatus.

Abstract: A head chip for inkjet printers and a method thereof are provided. The head chip has a semiconductor substrate provided with heating elements and pads for applying electric power to the heating elements, and has first Metal Oxide Semiconductors (MOSs) formed in the semiconductor substrate, wherein the first MOSs are formed in the semiconductor substrate and in semiconductors heterogeneous with respect to the semiconductor substrate, and semiconductor wells homogeneous with respect to the first MOSs are formed in the semiconductor substrate in direction of wires connected to the pads.

Abstract: An inkjet printer head driving apparatus and a control method thereof include a switching unit turning on and off each of heating elements to heat and eject ink through nozzles, a level shift unit having a level converter converting to a predetermined potential level a potential level of a signal inputted to drive the switching unit, a transient time extending part provided with at least one time extending element to extend a transient time during which a potential level of the signal inputted from the level converter to the switching unit is converted from a first signal level to a second signal level and vice versa, and a control unit outputting to the level shift unit the delayed signal as a nozzle selection signal to select the nozzles corresponding to a to-be-recorded image.

Abstract: An ink-jet printer includes a nozzle driving unit selectively driving a plurality nozzles to discharge ink through the nozzles, a signal supply supplying a driving signal to the nozzle driving unit, a shift register storing a nozzle selection signal to select a nozzle after the nozzle selection signal is synchronized with a clock signal, a counter counting an input number of the clock signal and deciding whether to operate the shift register, and a controller inputting a discharge signal into the signal supply to discharge the ink when the shift register is disabled. The counter compares a set-up value set up in accordance with a bit number of the nozzle selection data signal with the input number of the clock signal to disable the shift register. Therefore, noise introduced into the noise selection signal by the discharge signal is eliminated. Thus a malfunction of the head driving device can be prevented.

Abstract: An ink-jet printer includes a nozzle driving unit selectively driving a plurality nozzles to discharge ink through the nozzles, a signal supply supplying a driving signal to the nozzle driving unit, a shift register storing a nozzle selection signal to select a nozzle after the nozzle selection signal is synchronized with a clock signal, a counter counting an input number of the clock signal and deciding whether to operate the shift register, and a controller inputting a discharge signal into the signal supply to discharge the ink when the shift register is disabled. The counter compares a set-up value set up in accordance with a bit number of the nozzle selection data signal with the input number of the clock signal to disable the shift register . Therefore, noise introduced into the noise selection signal by the discharge signal is eliminated . Thus a malfunction of the head driving device can be prevented.

Abstract: An apparatus and a method for enhancing a telephone call quality of a facsimile system with a wireless telephone function. The telephone call quality enhancing apparatus comprises a wireless circuit controller operative as a master for controlling the wireless circuit to perform the wireless telephone function, a facsimile circuit controller operative as a slave for controlling the facsimile circuit to perform the facsimile function, and a power switch for supplying power to the facsimile circuit controller and the facsimile circuit under control of the wireless circuit controller only when the facsimile function is performed. The facsimile system with the wireless telephone function according to the present invention has an improved telephone call distance and an enhanced telephone call quality as compared with a conventional facsimile system with a wireless telephone function.