摘要:
A surface heating type heating unit for a fixing device, and a fixing device and an image forming apparatus including the same. The surface heating type heating unit includes a planar heating element on an outer circumferential surface of a supporter having cylindrical shape, a power feeding terminal at each end of the supporter, and a connector disposed between the planar heating element and the power feeding terminal. The connector is formed on a first region on the power feeding terminal, and includes an adhesive material for adhering the planar heating element and the power feeding terminal, and a conductive material formed on a second region of the power feeding terminal excluding the first region.
摘要:
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.
摘要:
An inkjet print head and an inkjet image forming apparatus having the same includes photo sensors are mounted on the inkjet print head to sense whether or not nozzles normally discharge ink and to sense missing nozzles whenever the ink is printed on a recording paper, thereby rapidly and correctly sensing the missing nozzles.
摘要:
Auxiliary nozzles to be used as substitutes for main nozzles formed near an ink feedhole in a print head. The main nozzles are used to perform printing when such nozzles are not defective. When a main nozzle has become defective and cannot normally jet ink, a corresponding spare nozzle is used to perform printing in place of the main nozzle.
摘要:
A method to compensate for a degradation of print image quality generated by a defective nozzle, from which no ink or less than a design specification required amount of ink is ejected, in an inkjet image forming device includes moving a printer head a moving distance in a scanning direction, shifting image data corresponding to nozzles of the printer head in a direction opposite to the moving direction of the printer head by the number of nozzles corresponding to the moving distance of the printer head, and printing an image by driving the nozzles according to the shifted image data, and an apparatus to compensate for a degradation of print image quality generated by a defective nozzle, from which no ink or less than a design specification required amount of ink is ejected.
摘要:
An apparatus to prevent overheating of a print head. The apparatus includes a temperature sensing unit, a voltage dividing unit, and a comparing unit. The temperature sensing unit includes a first resistor having a low temperature coefficient of resistance (TCR) and a second resistor having a higher TCR than the first resistor, and outputs a voltage between the first resistor and the second resistor. The first resistor and the second resistor are connected in series. The voltage dividing unit divides a reference voltage and outputs the divided reference voltage. The comparing unit compares the output voltage of the temperature sensing unit and the output voltage of the voltage dividing unit and outputs a signal to stop an operation of the print head according to the comparison result.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
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.