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7628463 |
Imaging forming apparatus
An image forming apparatus is disclosed that includes a recording head including a nozzle from which liquid droplets are ejected, a pressure chamber communicating with the nozzle and containing...
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7628462 |
Droplet discharge device and method of driving the same
In order to preserve good droplet discharge efficiency in a droplet discharge device, a plurality of timings are set within a period in which a plurality of droplets are to be discharged to a...
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7618128 |
Liquid ejection head, liquid ejection apparatus, and drive control method
The liquid ejection head comprises: a nozzle through which liquid is ejected; a pressure chamber which stores the liquid ejected through the nozzle; a pressurizing device which changes a volume of...
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7618108 |
Inkjet recording apparatus
An inkjet recording apparatus including: a recording head movable in a main scanning direction, and including: an ink passage; a nozzle communicated with the passage; and an actuator applying...
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7614719 |
Inkjet printer and inkjet head with modification of driving waveform data
A testing method includes sorting inkjet heads into a plurality of groups on the basis of known information about ink flow, preparing basic driving waveform data corresponding to each of the groups...
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7611214 |
Liquid ejecting apparatus
A liquid ejecting apparatus includes: a head having a nozzle; a pressure-changing unit for changing pressure of liquid in the nozzle in such a manner that the liquid is ejected from the nozzle; a...
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7604313 |
Ink-droplet ejecting apparatus
There is disclosed an ink-droplet ejecting apparatus including: ink passages each including a pressure chamber filled with ink; actuators each operated to change, upon receiving a drive signal, an...
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7600837 |
Droplet ejection apparatus
A droplet ejection apparatus comprises: (a) a recording head including a nozzle from which a droplet of a liquid is ejected, (b) a pressure chamber which is filled with the liquid and whose volume...
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7591520 |
Ink jet printer and method for determining pulse width
An ink jet printer has an ink jet head comprising a nozzle that discharges an ink droplet toward a print medium, and an actuator that makes the nozzle discharge the ink droplet when a pulse signal...
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7591522 |
Adjusting printing parameters in response to printhead feedback
The present invention relates to a method of printing using dots of ink discharged from nozzles to form the image. To ensure quality and efficiency of printing, a feed back mechanism from the...
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7585037 |
Liquid jet apparatus and printing apparatus
A liquid jet apparatus includes a plurality of nozzles provided to a liquid jet head, an actuator provided corresponding to each of the nozzles, and drive unit for applying a drive pulse to the...
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7581802 |
Liquid jet apparatus, printing apparatus, and method of adjusting phase of drive pulse
A liquid jet apparatus includes a plurality of nozzles provided to a liquid jet head, an actuator provided corresponding to each of the nozzles, and drive unit that applies a drive pulse to the...
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7578568 |
Liquid ejection method
A liquid ejection method includes generating drive signals including ejection pulses, and applying the ejection pulses to an element that performs an operation for causing a liquid to be ejected....
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7568776 |
Recording apparatus
A serial signal for generating a plurality of recording waveform signals is transmitted serially from a signal transmission circuit to a head river. A serial-parallel converting circuit parallely...
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7567357 |
Ink jet record apparatus
An ink jet record apparatus has a record head that ejects ink from a nozzle to form an image on a record medium, a maintenance portion that executes maintenance operation to prevent drying of the...
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7562954 |
Inkjet printer
An aspect of the invention provides an inkjet printer including: an inkjet head and a controller. The inkjet head moves relative to a recording medium to perform printing. The inkjet head includes,...
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7559626 |
Inkjet recording head substrate and drive control method, inkjet recording head, inkjet recording head cartridge and inkjet recording apparatus
An inkjet recording head substrate having an electrothermal transducer for generating thermal energy used to discharge ink and a drive element for driving the electrothermal transducer mounted...
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7556353 |
Printhead with small drive transistor to nozzle area ratio
A inkjet printhead that has a wafer substrate with a fluid ejection surface, and an array of drop ejectors for ejecting drops of printing fluid onto a media substrate, the array being formed on the...
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7556328 |
Liquid-droplet jetting apparatus
A liquid-droplet jetting apparatus such as an ink-jet printer makes a meniscus of an ink in a nozzle vibrate by applying a no-jetting drive pulse which does not jet the ink. An operation of...
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7554690 |
Array type inkjet printer system including print head, resolution adjusting unit, rendering unit and scaler
An array type inkjet printer system having a print head with a plurality of nozzles formed therein in the horizontal scan direction includes a resolution adjusting unit for reducing a resolution in...
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7549716 |
Method of ejecting microdroplets of ink
The method of ejecting microdroplets of ink includes a first step for generating one ink column on the outside of the nozzle and for separating a tip end of the one ink column from a remaining part...
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7537299 |
Liquid ejection apparatus, drive signal application method, and liquid ejection method
The liquid ejection apparatus includes: (A) a drive signal generation section generating first and second drive signals to be applied to an element that can execute a liquid-ejection operation; (B)...
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7537300 |
Inkjet printer
An inkjet printer whose ink discharge characteristics will rarely change even when used for a long period of time is developed. The inkjet printer has a pressure chamber, a piezoelectric actuator...
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7530654 |
Liquid ejection apparatus, liquid ejection method, and printing system
The liquid ejection apparatus includes: a head having a plurality of nozzles each for ejecting a liquid droplet, and a plurality of elements each provided in correspondence with a respective one of...
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7520580 |
Device and method for ejecting ink droplet
An ink droplet ejection device including: (a) actuators each operable to apply an ejection pressure to an ink stored in a corresponding pressure chamber, for causing an ink ejection through a...
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7520579 |
Image forming apparatus having droplet speed control
An image forming apparatus includes a recording head, and a drive pulse generator. The recording head includes a nozzle to discharge a droplet of recording liquid, a pressure-generating room to...
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7520581 |
Ink droplet ejection device
An ink droplet ejection device including: (a) actuators each operable to apply an ejection pressure to an ink stored in a corresponding pressure chamber, for causing an ink ejection through a...
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7506952 |
Method of removing particulates from a printhead using film transfer
A method of removing particulates from an ink ejection face of a printhead is provided. The method comprises the steps of: (a) flooding the face with ink from the printhead, thereby dispersing the...
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7500734 |
Inkjet recording head and inkjet recording device
In a recording head which discharges ink, which is supplied from an ink flow path to pressure chambers, from nozzles by operation of actuators, one actuator is provided for each pressure chamber....
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7500726 |
Liquid ejecting apparatus driving-signals generation
A liquid ejecting apparatus includes: a head having a nozzle; a pressure-changing unit for changing pressure of liquid in the nozzle in such a manner that the liquid is ejected from the nozzle; a...
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7497536 |
Fluid ejection device
A fluid ejection device including firing cells including a first group of firing cells and a second group of firing cells, a control line configured to receive a control signal and control...
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7494199 |
Head control device and image recording apparatus
There is provided a head control device able to re-charge an electromechanical transducing element with a driving pulse without requiring an additional re-charging time period in a recording...
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7494202 |
Image forming apparatus and a sub-line control section for an image forming apparatus
What is disclosed is an image forming apparatus to form each of lines formed with different sizes of dots, comprising: a print control section to control printing by providing elements for...
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7494201 |
System and method for reducing printing errors by limiting the firing frequency of a print head
A method and apparatus for printing an image on a print medium using an ink jet print head in an apparatus having an encoder system. The method includes generating a first firing pulse for the...
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7490920 |
Method of driving droplet jetting head, droplet jetting apparatus, and device manufacturing method
A method of driving a droplet jetting head having cavities for containing a predetermined liquid, piezoelectric elements, each for generating pressure in each cavity in accordance with an applied...
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7491911 |
MEMS bubble generator for large stable vapor bubbles
A MEMS vapour bubble generator that uses a heater in thermal contact with a liquid to generate a bubble. The heater is energized by an electrical pulse that is shaped to have a relatively low...
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7488049 |
Line head inkjet printer
A line head inkjet printer includes an inkjet head, a controller and a storage unit. The controller generates n kinds of waveforms used to eject different amounts of ink from the nozzles (3≦n...
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7481508 |
Printing apparatus and printing system
A printing apparatus that can prevent unexpected operation of an element is to be achieved. The printing apparatus is provided with: a drive signal generating circuit that can generate a plurality...
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7467864 |
Recording head, head cartridge and recording apparatus
In a connection status output circuit for confirming the connection status with a recording apparatus via connecting terminals corresponding respectively to recording signal DATA, clock signal CLK...
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7465003 |
Liquid ejector and liquid ejecting method
The present invention is directed to a liquid discharge apparatus adapted for discharging inks from discharge holes, which includes a control unit for controlling a discharge control unit, wherein...
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7465031 |
Liquid-ejection apparatus
Flying characteristics of ink droplets are controlled efficiently to the utmost. In one liquid chamber, two heating elements with the same surface-shape and the same heating characteristics are...
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7452042 |
Ink jet head driving method and apparatus
There is provided an ink jet head driving method for applying a drive pulse to an actuator to change capacities of a plurality of pressure chambers in which ink has been filled, ejecting an ink...
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7448708 |
Liquid droplet ejecting head, image recording apparatus, recording method, and image recording method with digital signals expressing voltage and duration of a waveform
A liquid droplet ejecting head has a nozzle, a driving element which ejects a liquid droplet from the nozzle by being driven, a storing unit, a driving waveform generating unit, and a supplying...
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7449070 |
Waveform generator for microdeposition control system
A microdeposition system ( 20 ) and method includes a head with a plurality of nozzles ( 230 ). A controller ( 22 ) generates nozzle firing commands that selectively fire the nozzles to create a...
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7446901 |
Conforming output intensities of pens
A linearization data structure is generated for a pen, in view of another pen, for conforming output intensities of the pen to output intensities of the other pen.
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7445305 |
Droplet ejection apparatus and droplet ejection method
A droplet ejection apparatus of the present invention includes a plurality of ejection components having a first ejection component and a second ejection component which are connected to each other...
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7416269 |
Ink jet printer, controlling method for an ink jet printer, and computer program product therefor
An ink jet printer is provided with an ink jet head and a controller. The ink jet head comprises a nozzle, an ink chamber communicating with the nozzle, a pressure chamber located between the...
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7416268 |
Drive circuit of piezoelectric element, driving method thereof, liquid ejection apparatus and image forming apparatus
The drive circuit drives a plurality of piezoelectric elements connected in a matrix connection, each of the piezoelectric elements having a first electrode and a second electrode, and the drive...
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7413292 |
Method of driving piezoelectric ink jet head
The present invention is directed to a method for driving a piezoelectric ink jet head comprising a piezoelectric actuator AC that includes two piezoelectric ceramic layers 7 a , 7 b having such...
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7413272 |
Methods and apparatus for precision control of print head assemblies
The present invention provides methods and apparatus for controlling the quantity of fluid output (e.g., drop size) by individual nozzles of a print head to a very high precision at a frequency...
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