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| Number | Title | Issue Date |
| 8061796 | Generating halftone print data for overlapping consecutive printhead segments A method of generating halftone print data for overlapping end portions of a pair of consecutive printhead segments in an array of two or more printhead segments is disclosed. Generally an end portion of a first printhead segment overlaps an end portion of a second ... | 11/22/2011 |
| 8057004 | Printhead assembly having selected interconnected controllers A printhead assembly is provided having a plurality of print nozzle integrated circuits, an electrical connector for connecting electrical signals to the print nozzle integrated circuits, and drive electronics having electrical contacts for electrical connection to ... | 11/15/2011 |
| 8038245 | Ink jet printer, method of controlling an ink jet printer, and computer program product for an ink jet printer A printer is provided with an ink jet head and a controller. The ink jet head prints on a print medium by discharging ink. The ink jet head comprises a plurality of units. Each unit comprises a nozzle for discharging ink, a pressure chamber communicating with the no... | 10/18/2011 |
| 7976116 | Inkjet printer system having equalised control of different nozzle count printhead ICs An inkjet printer system is provided having a printhead and controller. The printhead has a row of inkjet nozzles for printing one ink color formed by adjacent inkjet nozzle rows of adjacent integrated circuits. Each integrated circuit has a different number of inkj... | 07/12/2011 |
| 7954919 | Printer including dot data generator with stochastically ramped print data A printer including a print media transport path, a plurality of printhead modules located across the print media transport path, each printhead module having an elongate printhead, said printheads being slanted and nozzles of respective printheads overlap with nozz... | 06/07/2011 |
| 7942490 | Ink jet printer, method of controlling an ink jet printer, and computer program product for an ink jet printer A printer is provided with an ink jet head and a controller. The ink jet head prints on a print medium by discharging ink. The ink jet head comprises a plurality of units. Each unit comprises a nozzle for discharging ink, a pressure chamber communicating with the no... | 05/17/2011 |
| 7938498 | Inkjet printhead with overlapping segments An inkjet printhead has a pair of adjacent printhead segments having overlapping ink ejection nozzles. A degree of overlap of the printhead segments is determined, and a half toning of a continuous tone image is provided. The half toning is provided by a dither matr... | 05/10/2011 |
| 7901023 | Inkjet printhead with drive circuitry controlling variable firing sequences An inkjet printhead includes: an array of ink ejection nozzles, an actuator for each nozzle and drive circuitry for receiving print data from a printhead controller and distributing fire signals to the actuators. The drive circuitry is configured to fire the actuato... | 03/08/2011 |
| 7874632 | Ink jet printer In order to settle a phenomenon that a quantity of jetted ink increases at the end of an image and a density increases in a shear-mode ink jet head, in a three-split driven head, a first group prints so that a diameter of a dot is reduced by reducing the quantity of... | 01/25/2011 |
| 7866778 | Printhead module having nozzle redundancy for faulty nozzle tolerance A printhead module comprising a plurality of rows, each of the rows comprising a plurality of nozzles for ejecting ink, wherein the printhead module includes at least first and second rows configured to print ink of a similar type or color, and being configured such... | 01/11/2011 |
| 7866779 | Defective nozzle replacement in a printer Printing is performed at a full resolution using a first set of nozzles and a second set of nozzles arranged on a printhead. Printing is performed at less than the full resolution using the first set of nozzles less any nozzles in the first set of nozzles that have ... | 01/11/2011 |
| 7841680 | Ink jet printing apparatus and ink jet printing method An object of the present invention is to provide an ink jet printing apparatus and an ink jet printing method which can prevent print quality from being degraded by a non-ejection nozzle while maintaining high-speed printing performance based on a raster division me... | 11/30/2010 |
| 7837289 | Method of printing with overlapped segements of printhead A method of printing with overlapped segments of a segmented printhead is provided in which at least one temperature sensor on the printhead measures temperatures of adjacent segments to determine an overlapped region of the adjacent segments, an overlap signal indi... | 11/23/2010 |
| 7828404 | Ink jet printer, method of controlling an ink jet printer, and computer program product for an ink jet printer A printer is provided with an ink jet head and a controller. The ink jet head prints on a print medium by discharging ink. The ink jet head comprises a plurality of units. Each unit comprises a nozzle for discharging ink, a pressure chamber communicating with the no... | 11/09/2010 |
| 7823998 | Liquid ejection apparatus and liquid ejection method Even when ejection characteristics of ink droplets are dispersed between unit heads and when arrangement accuracies of unit heads are dispersed, stripe unevenness is alleviated by correction corresponding to each unit head. In a liquid ejection apparatus having a li... | 11/02/2010 |
| 7819494 | Printhead IC with multi-stage print data loading and firing A printhead IC comprising: an array of nozzles; drive circuitry for receiving print data and fire commands from a print engine controller; wherein during use, the drive circuitry receives the print data for the array in a plurality of sequential portions with a fire... | 10/26/2010 |
| 7815275 | Interactive visual card-selection process for mitigating light-area banding in a pagewide array Preferably, test-patterns print on separate, multiple print-medium cards, each including a ramp with colors graded along a certain direction—and, superimposed on the ramp, a candidate add-on colorant. Ramps preferably are printed in so-called “customer colors”... | 10/19/2010 |
| 7806498 | Printhead arrangement having overlapping print regions Provided is a printhead arrangement having a number of printhead segments arranged to have overlapping print regions, and a printer controller. The controller includes a sensor for sensing a temperature of the respective segments, said temperature indicative of an e... | 10/05/2010 |
| 7775616 | Printhead having controllers for multi-channel printhead modules A printhead is provided having elongate printhead modules arranged parallel to each other to extend across a pagewidth and controllers for processing print data into dot data and for controlling the printhead modules in accordance with the dot data. Each printhead m... | 08/17/2010 |
| 7758142 | High volume pagewidth printing A print assembly (14) for pagewidth inkjet printing that includes an elongate carrier that is mountable on a support structure (12) of a printer (10) in an operative position with respect to a platen (106, 108) of the printer. A number of... | 07/20/2010 |
| 7758143 | Printhead module having nozzle redundancy A printhead module comprising at least first and second rows configured to print ink of a similar type or color, at least some nozzles in the first row being aligned with respective corresponding nozzles in the second row in a direction of intended media travel rela... | 07/20/2010 |
| 7744183 | Method of generating halftone print data for overlapping consecutive printhead segments A method of generating halftone print data for overlapping end portions of a pair of consecutive printhead segments in an array of two or more printhead segments. Generally an end portion of a first printhead segment overlaps an end portion of a second printhead seg... | 06/29/2010 |
| 7726759 | Image forming apparatus The image forming apparatus comprises: a liquid ejection head which has a plurality of nozzles and a plurality of pressure generating elements corresponding to the nozzles, and applies a drive signal to the pressure generating elements so as to eject recording liqui... | 06/01/2010 |
| 7726760 | Printing apparatus, method of inspecting nozzles for abnormalities, and program A printing apparatus records a predetermined test pattern on printing paper, and reads the test pattern by means of a scanner. The scanner reads the test pattern at a resolution lower than the resolution of a recording head. This allows the automatic and fast readin... | 06/01/2010 |
| 7726761 | Pattern forming method, droplet ejecting device, and electro-optic device A pattern forming method includes: disposing a portion of a first nozzle group composed of a plurality of first nozzles arranged in a first direction and a portion of a second nozzle group composed of a plurality of second nozzles arranged in the first direction so ... | 06/01/2010 |
| 7722146 | Printing system having controlled multi-length printhead ICS Printing system is provided which has a plurality of printhead integrated circuits of different lengths and a controller configured to supply print data to the printhead integrated circuits. The printhead integrated circuits are arranged to define a pagewidth printh... | 05/25/2010 |
| 7703871 | Liquid ejecting device and method of controlling liquid ejecting device A liquid ejecting device includes a head unit group in which head units are arranged in a second direction perpendicular to a first direction in which a head unit having a nozzle group formed by aligning nozzles that eject liquids and a landing target relatively mov... | 04/27/2010 |
| 7686412 | Printing system for layered object printing A printing system is provided having a conveyor for conveying a substrate along a conveying direction, and a sequence of printhead groups arranged along the conveying direction for printing respective object layers onto one another. A first printhead group within th... | 03/30/2010 |
| 7681973 | Ink jet printing apparatus, ink jet print head, ink jet printing method, and method and program for setting print conditions In manufacturing a long ink jet print head in which a plurality of chips are arranged, a decrease in yield resulting from inappropriate arrangement of the chips can be suppressed and high-quality images can be printed. An image corresponding to the joining portion b... | 03/23/2010 |
| 7677687 | Printer including overlapping elongate printheads A printer includes a plurality of stationary printhead modules located across a print media transport path. In order to provide continuity of printheads across the transport path some, or all, of the printheads are slanted so that the ends of the printheads overlap.... | 03/16/2010 |
| 7673954 | Image forming apparatus The image forming apparatus in which image is formed on a recording medium by ejecting droplets onto the recording medium comprises: a plurality of ejection ports through which the droplets are ejected; a line head in which the ejection ports are aligned along a len... | 03/09/2010 |
| 7658460 | Printing apparatus, method, and program comprising a plurality of printer units using synchronized, divided print data High-density image printing can be achieved by using ink jet print heads capable of ejecting ink. A plurality of same color print heads capable of ejecting the same color ink are controlled according to the same print data. Drive timings for the same color print hea... | 02/09/2010 |
| 7654627 | Inkjet recording apparatus and method for processing recording data An inkjet recording apparatus that records data on a recording medium based on recording data and using a plurality of line heads includes a thinning pattern generation unit (12) that generates one line of thinning pattern for determining whether or not each ... | 02/02/2010 |
| 7618110 | Inkjet printhead with overlapping segments and temperature sensors An inkjet printhead has a pair of adjacent printhead segments having overlapping ink ejection nozzles, with degrees of overlap of said printhead segments corresponding with predetermined temperatures. A pair of temperature sensors is on respective printhead segments... | 11/17/2009 |
| 7611215 | Inkjet printer system having equalised control of multi-length printhead ICS An inkjet printer system is provided having an pagewidth printhead and controller, The printhead has at least two integrated circuits of different lengths arranged across the pagewidth to define the pagewidth printhead having at least one row of inkjet nozzles for p... | 11/03/2009 |
| 7604314 | Inkjet printhead assembly having printhead modules with nested ends An inkjet printhead assembly includes an elongate support defining a plurality of parallel ink supply channels. A shim is mounted on the support and defines a plurality of rows of openings through which ink from respective supply channels can be provided. A pluralit... | 10/20/2009 |
| 7597415 | Liquid-droplet jetting apparatus having a serial auxiliary head An ink-jet printer has a line-type ink-jet head which has a nozzle row including a plurality of nozzles arranged in an array in a scanning direction; an auxiliary head which is movable in the scanning direction and which has a plurality of nozzles arranged in an arr... | 10/06/2009 |
| 7591521 | Image forming apparatus and method This is an image forming apparatus provided with a recording head obtained by overlapping and disposing a plurality of short recording heads with a nozzle array composed of ink-jet nozzles arrayed in one direction, for jetting ink from the ink-jet nozzle, based on a... | 09/22/2009 |
| 7578569 | Printhead with variable nozzle firing sequence A printhead for an inkjet printer, the printhead comprising: an array of ink ejection nozzles; a plurality of actuators arranged such that one of the actuators corresponds to one of the nozzles respectively in order to eject ink therethrough; a drive circuitry for r... | 08/25/2009 |
| 7571970 | Self-aligned precision datums for array die placement A method and resulting device for accurately positioning an array of die modules in an imaging array, including larger partial width arrays and full page width arrays, is described herein. The method includes forming physical reference datum directly on an individua... | 08/11/2009 |
