Abstract: A recording head 200 has a plurality of nozzle orifices aligned in a row extending in a first direction. The recording head 200 is arranged with the nozzle orifices in confrontation with a recording medium P. The recording medium P is moved in a second direction B with respect to the recording head 200. Also, ink droplets ejected from the nozzle orifices are charged to a charged amount that corresponds to deflection amount of the ink droplets. The charged ink droplets are deflected in a direction perpendicular to a main scanning line. The plurality of ink droplets ejected from the plurality of nozzle orifices impinge on the same pixel position or at a nearby position so that it is possible to impinge multiple droplets at the same pixel position or a nearby position. As a result, it is possible to back up broken nozzles and to reduce recording distortion.

Abstract: When ink droplets are ejected, angled or splashed where a plurality of minute ink droplets are generated, angled or splashed ink clings on an electrode 401, 402 and increases the amount of electric current conducted therethrough. Hence, the defectiveness of ink ejection can be detected by monitoring the amount of the electric current. When the defectiveness of ink ejection is detected, ejection data D is retrieved and updates the ejection data D based on a condition register S, and set to a defect register E. When the defect register E has only one element that takes a condition value of 1 indicating defectiveness, the corresponding nozzle is identified as defective. The restoring means reallocates dots, which have been originally allocated to the defective nozzle, to neighboring nozzle.

Abstract: A recording head 200 has a plurality of nozzle orifices aligned in a row extending in a first direction. The recording head 200 is arranged with the nozzle orifices in confrontation with a recording medium P. The recording medium P is moved in a second direction B with respect to the recording head 200. Also, ink droplets ejected from the nozzle orifices are charged to a charged amount that corresponds to deflection amount of the ink droplets. The charged ink droplets are deflected in a direction perpendicular to a main scanning line. The plurality of ink droplets ejected from the plurality of nozzle orifices impinge on the same pixel position or at a nearby position so that it is possible to impinge multiple droplets at the same pixel position or a nearby position. As a result, it is possible to back up broken nozzles and to reduce recording distortion.

Abstract: An ink jet recording device 10 includes a plurality of head modules 210 each formed with a plurality of nozzles for forming dots on a recording sheet 100. When the assembly of the head modules 210 has any positional error, recorded dots will shift to undesirable positions. However, the ink jet recording device 10 of the present invention adjust the dot forming positions to desirable positions in an electrical manner without actually and mechanically moving the head modules 210, both in directions perpendicular to and parallel with a nozzle line.

Abstract: An ink jet recording device 1 includes electrodes 401, 402 for generating charging and deflector electric fields E1, E2 common to all nozzles 107a. The ink jet recording device 1 also includes means for controlling the charging electric field pattern and ink-droplet ejection interval. Accordingly, ejected ink droplets 501 are controlled to impact on grid corners 704a of grids 704 defined by x-y coordinate system.

Abstract: An ink jet recording device 1 includes electrodes 401, 402 for generating charging and deflector electric fields E1, E2 common to all nozzles 107a. The ink jet recording device 1 also includes means for controlling the charging electric field pattern and ink-droplet ejection interval. Accordingly, ejected ink droplets 501 are controlled to impact on grid corners 704a of grids 704 defined by x-y coordinate system.

Abstract: When ink droplets are ejected angled or splashed where a plurality of minute ink droplets are generated, angled or splashed ink clings on an electrode 401, 402 and increases the amount of electric current conducted therethrough, and so the defectiveness of ink ejection can be detected by monitoring the amount of the electric current. When the defectiveness of ink ejection is detected, ejection data D is retrieved and updates the ejection data D based on a condition register S, and set to a defective register E. When the defective register E has only one element that takes a condition value of 1 indicating defectiveness, the corresponding nozzle is identified defective. The restoring means reallocates dots, which have originally allocated to the defective nozzle, to neighboring nozzle.

Abstract: An ink jet recording device 10 includes a plurality of head modules 210 each formed with a plurality of nozzles for forming dots on a recording sheet 100. When the assembly of the head modules 210 has any positional error, recorded dots will shift to undesirable positions. However, the ink jet recording device 10 of the present invention adjust the dot forming positions to desirable positions in an electrical manner without actually and mechanically moving the head modules 210, both in directions perpendicular to and parallel with a nozzle line.

Abstract: A print head for ink jet printer having a reduced length in a main scanning direction and an elongated length in an auxiliary scanning direction perpendicular to the main scanning direction. A plurality of linear print head modules are arrayed in the auxiliary scanning direction, and each linear print head module extends in a slanting direction with respect to the main scanning direction by a predetermined angle. Further, each linear print head module has a width in a direction perpendicular to its extending direction. The slanting angle and the width determine scanning pitch extending in the auxiliary scanning direction and can reduces the length of the print head in the main scanning direction.

Abstract: In an ink jet recording head, the thin-film thermal resistor is covered by an electrically-insulating oxidation film. An inorganic insulation layer is formed over a part of the thin-film thermal resistor and the thin-film conductor. An organic insulation layer is formed over at least a part of the inorganic insulation layer that covers the connecting edge of the connection portion between the thin-film thermal resistor and the thin-film conductor.

Abstract: In an ink ejection type recording device in which expansion of bubble ejects an ink droplet from a nozzle toward a recording medium, a heater formed in an ink channel is applied with a pulse of voltage by a driver circuit. The pulse of voltage is determined so that the surface of the heater in direct contact with the water-based ink is rapidly heated to a temperature causing to invoke caviar-wise nucleation of the ink that is in direct contact with the surface of the heater. Expanding bubbles resulting from the caviar-wise nucleation ejects an ink droplet from the nozzle, wherein the heater is heated at a heating speed in a range from 1.times.10.sup.8 .degree. C./sec to 5.times.10.sup.8 .degree.C./sec, and the surface of the heater is heated up from a room temperature to a temperature substantially equal to 320 C within a period of time ranging from 0.6 to 3 .mu.sec.

Abstract: An ink jet printing device including an ink channel wall defining an ink chamber; a nozzle portion formed with a nozzle connecting the ink chamber with atmosphere; and a thermal heater formed to the ink channel wall adjacent to the nozzle portion, the thermal heater including a Ta--Si--O ternary alloy thin film resistor having a composition of 64% .ltoreq.Ta.ltoreq.85%, 5%.ltoreq.Si.ltoreq.26%, and 6%.ltoreq.O.ltoreq.15% and a nickel film conductor.

Abstract: A plurality of heaters are provided on a silicon substrate in a plurality of individual ink channels. Each heater is constructed from a thin-film resistor and a thin-film conductor. The thin-film resistor is formed with an electrical insulation layer at its upper surface. The electrical insulation layer is formed through subjecting the thin-film resistor to a high-temperature thermal oxidation process. The thin-film resistor formed with the electrical insulation layer may be covered with an additional insulation layer of a thickness substantially equal to the thin-film resistor.

Abstract: To provide a method of fabricating, using thin-film processes only, a 1,600 dpi head with nozzles arranged two-dimensionally on a substrate, e.g., silicon wafer, a drive LSI, thin-film resistors and thin-film conductors are formed on the silicon wafer. Thereafter, ink channels and through-holes are formed by silicon anisotropic etching from both sides of the silicon wafer. After connecting the orifice plate to the silicon wafer, nozzles are formed in the orifice plate using photoetching.