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7175248 |
Fluid ejection device with feedback circuit
A fluid ejection device includes a plurality of fluid ejecting elements, each fluid ejecting element controllable to conduct electrical current between a supply voltage and a reference voltage. Up...
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7159959 |
Methods and systems for detecting errors in printhead pattern data and for preventing erroneous printing
Methods, systems and computer readable media for identifying print errors caused by erroneous print pattern data received at the printhead of a printer. Methods, systems and computer readable media...
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7156483 |
Method for determining ink drop velocity of carrier-mounted printhead using an optical scanner
A method for determining ink drop velocity of a printhead located at a gap above a print medium. A first ink mark is printed at a first printhead velocity. A second ink mark is printed at a...
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7150511 |
Recording apparatus and reciprocating record position alignment method
A recording apparatus has a bidirectional recording section, a check pattern recording section that forms check patterns different in record position of backward recording relative to forward...
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7144093 |
Inkjet printhead, driving method of inkjet printhead, and substrate for inkjet printhead
To drive an inkjet printhead having an array of printing elements, where the first and second printing elements which discharge relatively different amounts of ink are arranged on the same array in...
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7139096 |
Printing system and printing method
The colors used for forming an image are limited in advance to a predetermined number of color patterns called representative colors; on the host side the image data received is divided into...
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7131713 |
Bidirectional printing method and apparatus with reduced color unevenness
A printing apparatus, which forms a color image by applying different color inks to a printing material while bi-directionally moving the recording head to scan the recording material, includes a...
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7133153 |
Printhead having digital circuit and analog circuit, and printing apparatus using the same
In a printhead having an element substrate on which a digital circuit including a printing element and a drive circuit for driving the printing element in accordance with input print data, and an...
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7128394 |
Color inkjet print apparatus capable of changing orders of inks squirts
An apparatus for printing color inkjet images includes an image processing unit which processes source color data to generate output color data together with a signal indicative of an order of ink...
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7125090 |
Firing pulse duration control
This invention concerns the control of firing pulse duration in a printhead, for a printer, such as a high performance color printer. The invention, in particular concerns a control system and a...
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7125100 |
Terminals for circuit board
Circuit board 10 is of substantially rectangular shape, provided in the upper half of the juxtaposed face 13 with a substantially circular test terminal 20. In the lower half are provided a...
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7126715 |
Ink jet recording apparatus and control method therefor
A recording apparatus for recording with use of a recording head having two nozzle arrays arranged side-by-side includes first, second, and third direct memory access (DMA) units, a data converter...
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7125089 |
Driver device for a thermal print head
A print head has m driver devices 1 that are fed with a supply voltage VDD and that control the driving of resistive elements acting as heaters and a regulator 2 that is fed with a supply...
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7121639 |
Data rate equalisation to account for relatively different printhead widths
A printer controller configured to generate dot data for supply to a printhead that includes at least first and second longitudinally extending printhead chips that are positioned adjacent each...
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7121660 |
Print producing method and print producing apparatus
Individual droplets of a liquid composition landing on a printing medium during one pass (one scan) are connected to the respective adjacent droplets and integrated with them to form a flat coat...
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7114791 |
Head driving device of liquid jetting apparatus and method of driving the same
A head driving device of a liquid jetting apparatus includes a driving element, respectively provided corresponding to plural nozzles from which a liquid droplet is jetted, a driving waveform...
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7108344 |
Printmode for narrow margin printing
A printmode for an inkjet printer including a plurality of print nozzles and an edge guide projecting into a printzone into which at least one of the plurality of print nozzles may be transported...
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7104626 |
Printing method and printer with failure compensation
A printer including a transport system for a recording medium, a printhead containing a plurality of print units each of which being capable of printing a pixel line when the printhead is scanned...
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7104622 |
Device and method for driving jetting head
There is disclosed a head driving device which drives a plurality of pressure generating elements for generating pressure fluctuation in a jetted object contained in each of associated pressure...
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7104624 |
Fire pulses in a fluid ejection device
An fluid ejection device includes nozzles and includes firing resistors which correspond to the nozzles. Each firing resistor and corresponding nozzle are located in zones on the fluid ejection...
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7101007 |
Printhead, printhead driving method, and data output apparatus
The disclosed printhead can speed up transfer of image data and driving of printing elements without increasing the number of signal lines and connection terminals. An image data signal supplied to...
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7097265 |
Driving device of ink-jet print head, control method of the driving device, and liquid drop discharge apparatus
A driving device of an ink-jet print head is provided that discharges liquid drops through a plurality of nozzles. The driving device comprises a data storage unit which stores a data block for...
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7093915 |
Controlling direction of satellite droplet ejection in ink jet printer
A method of printing with a fluid jet printer ( 10 ) is provided. The printer ( 10 ) has a printhead ( 12 ) with a fluid ejecting face ( 12 a ) facing a recording medium ( 14 ), the fluid ejecting...
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7090321 |
Ink-jet head control circuit, ink-jet head module, data transmission method, and liquid drop discharge apparatus
An ink-jet head control circuit is provided that includes a latch circuit which respectively stores a first data block and a second data block following the first data block, for ink liquid drop...
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7083249 |
Method for establishing standard values to obscure banding in printed result of ink jet printer and ink jet printer set up by the same
The invention relates to a method for setting a tolerance of each standard value, which is a factor in determination of ink droplets landing accuracy, to an ink jet printer that is set up using the...
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7083255 |
Ink jet printing apparatus and ink jet printing method
This invention provides an ink jet printing apparatus of a low cost construction having a plurality of print head units arranged at equal intervals and capable of forming a high quality image at...
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7073885 |
Liquid jetting apparatus
The liquid jetting apparatus includes a head member having a nozzle, a supporting member that that can support a medium, a scanning mechanism that can cause the head member to relatively move with...
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7066564 |
Selection of printing conditions to reduce ink aerosol
Aerosol emissions within an inkjet printer are reduced. A printhead of the inkjet printer is fired using a first set of firing conditions when firing conditions are critical for printing...
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7063400 |
Printing apparatus and method for improving quality of printing image
The present invention is related to an apparatus and a method for improving the quality of printing. The reference timings are adjusted by random values to decrease the cyclic unevenness of images...
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7059698 |
Method of altering an effective print resolution of an ink jet printer
A method of printing using an ink jet printer includes the steps of: defining at least one scan line with a plurality of pixel locations spaced apart at a predetermined print resolution; scanning a...
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7052123 |
Ink jet image recording method and apparatus using the method
An ink jet image recording method including hitting an ink composition for ink jet recording on a recording material in a hitting volume of 0.1 to 100 pl at an ejection frequency of 1 KHz or more...
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7040727 |
Apparatus for controlling power supply to printer and method thereof
An apparatus for and a method of controlling a power supply for a printer. A power on signal is automatically provided to turn on the printer power supply in accordance with a predetermined...
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7036897 |
Method and apparatus for operating a printer
An incremental printer comprising a plurality of printing elements arranged to print different portions of an image, the printer being arranged, prior to printing an image, to identify elements...
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7036899 |
Printing apparatus and printhead control method
In a printing apparatus in which printing is performed by a printhead having a plurality of printing elements, each driven by electrical energy, and the number of printing elements driven at the...
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7036898 |
Supplying power to logic systems in printers
Power is provided from one portion of a printer, such as a printer electronics module, to another portion of the printer, such as a printhead. Logic signals produced in a first electronic module of...
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7032986 |
Self-calibration of power delivery control to firing resistors
A fluid ejection device having an internal power supply path and a power regulator providing an offset voltage from the internal power supply path voltage. A self-calibration circuit in the inkjet...
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7032987 |
Nozzle scheduling for ink jet printing
Nozzle scheduling algorithms that provide a unified approach to designing nozzle firing algorithms that incorporate a variety of specifiable nozzle-firing constraints such as print head (nozzle)...
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7029084 |
Integrated programmable fire pulse generator for inkjet printhead assembly
An inkjet printhead assembly includes at least one inkjet printhead having nozzles and firing resisters. The inkjet printhead assembly includes fire pulse generator circuitry responsive to a start...
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7025433 |
Changing drop-ejection velocity in an ink-jet pen
An exemplary method, which can be used to reduce errors related to pen-to-pen misalignment and/or paper-shape variation, entails changing the drop-ejection velocity of an ink-jet pen.
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7025437 |
Printing methods and apparatus for mutually interstitial printing and optional interlacing
A dot matrix printing method is provided for printing an image on a printing medium with a printing head and having an array of equally spaced marking elements. The marking elements are spaced...
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7021843 |
Modular print engine controllers
A page width print head assembly has a page width printhead comprising two or more printhead modules arranged end on end. A controller module is provided for each printhead module. The printhead...
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7021732 |
Printer jet detection method and apparatus
A method includes ejecting ink from a first set of one or more nozzles to form a first image pattern at least partially within an image field. The method likewise includes ejecting ink from a...
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7018010 |
Line scanning type ink jet recording device capable of finely and individually controlling ink ejection from each nozzle
A computer portion 201 of a printer includes a memory storing a printer driver software 201 a and nozzle profile data 211 . The printer driver software 201 a includes a raster image...
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7011395 |
Print head energy storage
The manner in which power is supplied to the firing elements of an ink jet printhead is improved by moving a power supply capacitor from the printer to the print head cartridge to improve the...
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7004555 |
Apparatus for ejecting very small droplets
An apparatus for ejecting very small droplets according to the present invention comprises a first ink ejector and a second ink ejector. The first ink ejector is controlled to eject a main droplet...
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6998928 |
Digital pulse width modulation
A digital technique for pulse width modulation (PWM) utilizes a tapped delay line 304 receiving a reference clock and generating a plurality of time delayed reference clock transitions having...
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6991309 |
Ink jet recording method and head
Liquid jet recording apparatuses and liquid jet recording methods are provided. Ink droplets are jetted from ink jetting orifices. A cross sectional area of each of the ink jetting orifices is...
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RE38941 |
Ink droplet ejecting method and apparatus
In an ink droplet ejecting method and apparatus, by merely adding one pulse after a driving waveform for a main ejection of ink, without changing the driving voltage, it is possible to obtain an...
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6979068 |
Printing apparatus and control method thereof
A printing apparatus which performs printing using a printhead having plural printing elements. Print data corresponding to a defective nozzle is added to print data corresponding to an adjacent...
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6969135 |
Recording apparatus
A recording apparatus has a recording head with a data generating unit that converts information transmitted from an external device into recording data that matches the configuration of the...
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