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| Number | Title | Issue Date |
| 8186792 | Timing signal generator and liquid ejecting apparatus incorporating the same A signal generating device to be installed in a liquid ejecting apparatus which comprises a liquid ejector operable to eject liquid and a carriage operable to carry the liquid ejector, the signal generating device comprising: a first generator to generate first puls... | 05/29/2012 |
| 8182057 | Liquid ejecting apparatus and method controlling liquid ejecting apparatus A liquid ejecting apparatus includes: a liquid ejecting head which includes nozzles, pressure generating chambers communicating with the nozzles, and pressure generating elements causing a pressure change in a liquid of the pressure generating chambers and which eje... | 05/22/2012 |
| 8172352 | Printing apparatus having line-type ink jet head and method of printing images by line-type ink jet head A printing apparatus is provided with a line-type ink jet head having a plurality of blocks on each of which a set of ink ejection elements are arranged. A drive signal generating unit is configured to generate a drive voltage signal including a prepulse to be appli... | 05/08/2012 |
| 8162426 | Recording apparatus A recording apparatus includes a calculator, a predictor, and a head controller. Assuming that first ejection signals are supplied to a recording head, the calculator calculates variations in total amount of liquid to be ejected, for respective constant periods of t... | 04/24/2012 |
| 8141973 | Liquid droplet ejection head and image forming apparatus having the same A liquid droplet ejection head comprises an ejector, a liquid viscosity-increase prevention structure and a liquid viscosity-increase prevention controller. The ejector includes a nozzle for ejecting a liquid droplet, a pressure chamber communicating with the nozzle... | 03/27/2012 |
| 8123318 | Printhead having controlled nozzle firing grouping A printhead is provided having a plurality of rows of nozzles, with the nozzles in each row being grouped into fire groups, and a controller configured to fire the nozzles of each fire group by outputting firing pulses to the nozzles. The controller sets the number ... | 02/28/2012 |
| 8113614 | Recording apparatus and method for controlling recording apparatus A recording apparatus for discharging ink from a recording head arraying a plurality of nozzles to execute recording of an image includes a drive unit configured to form a group with a defined number of nozzles so as to include an adjacent nozzle in a different bloc... | 02/14/2012 |
| 8109589 | Liquid discharging device and method of controlling the same A liquid discharging device includes a liquid discharging head which discharges liquid. A drive signal generator generates a drive pulse. A liquid receiving portion faces a nozzle-formed surface of the liquid discharging head and receives discharged liquid. Electric... | 02/07/2012 |
| 8109590 | Liquid ejecting apparatus and method of setting signal for micro vibration A liquid ejecting apparatus includes liquid chambers in which a liquid is filled, nozzles communicating with the liquid chambers, a signal generator generating a signal of potential change, and elements operating in accordance with the potential of the signal to be ... | 02/07/2012 |
| 8096632 | Liquid ejecting apparatus and method for controlling liquid ejecting apparatus A liquid ejecting apparatus includes a liquid ejecting head with a pressure chamber communicating with a nozzle opening and a pressure generator capable of causing a pressure fluctuation to liquid in the pressure chamber. The liquid ejecting head discharges liquid d... | 01/17/2012 |
| 8083309 | Liquid ejecting apparatus and liquid ejecting method A liquid ejection apparatus includes an element that is charged and discharged so as to perform an operation to eject a liquid, an analog signal generating unit that generates an analog signal having a voltage change pattern for determining the operation of the elem... | 12/27/2011 |
| 8061795 | Nozzle assembly of an inkjet printhead A nozzle assembly for an inkjet printhead is disclosed. The nozzle assembly includes an inkjet nozzle having an actuator for ejecting an ink droplet from the inkjet nozzle when a resistive element of the actuator is heated by an electrical current, a shift register ... | 11/22/2011 |
| 8057003 | Method and apparatus to provide variable drop size ejection with a low power waveform In one embodiment, a method for driving a droplet ejection device having an actuator includes applying a low power multi-pulse waveform having at least two drive pulses and at least one intermediate portion to the actuator. The method further includes alternately ex... | 11/15/2011 |
| 8057002 | Method of driving an ink-jet head, ink-jet head, and ink-jet recording apparatus Provided is an ink-jet head and an ink-jet type recording apparatus for improving an impact position accuracy of ink droplets by eliminating a discharge speed difference of ink droplets when an ink volume is changed gradually in a plurality of steps to perform grada... | 11/15/2011 |
| 8038243 | 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 level-data setting unit for setting a selected level data from a plura... | 10/18/2011 |
| 8025353 | Process and apparatus to provide variable drop size ejection with an embedded waveform Described herein is a process and apparatus for driving a droplet ejection device with embedded multi-pulse waveforms. In one embodiment, the process includes generating a multi-pulse waveform that includes drive pulses in predetermined positions. Next, the process ... | 09/27/2011 |
| 8020955 | Liquid ejecting apparatus and method of setting signal for micro vibration A liquid ejecting apparatus includes liquid chambers in which a liquid is filled, nozzles communicating with the liquid chambers, a signal generator generating a signal of potential change, and elements operating in accordance with the potential of the signal to be ... | 09/20/2011 |
| 8016377 | Inkjet recording apparatus An inkjet recording apparatus has a head which includes, a plurality of nozzles each of which jets ink containing spacer beads dispersed therein on a substrate; a plurality of pressure chambers each of which communicates with each of the nozzles; and an plurality of... | 09/13/2011 |
| 7997672 | Inkjet recording apparatus An inkjet recording apparatus includes a waveform outputting circuit and a current restricting circuit. The waveform outputting circuit outputs to each individual electrode one of ejection signals and a flushing signal, which does not cause any nozzle to eject ink d... | 08/16/2011 |
| 7997673 | Printhead IC with temperature based de-clog ejection A printhead IC is provided having an ejection nozzle, drive circuitry for generating drive signals for driving the ejection nozzle, and a temperature sensor connected to the drive circuitry. The drive circuitry adjusts the drive signals in response to output of the ... | 08/16/2011 |
| 7988250 | Continuous printing using temperature lowering pulses A printer includes a printhead and a source of liquid. The printhead includes a nozzle bore. The liquid is under pressure sufficient to eject a column of the liquid through the nozzle bore. The liquid has a temperature. A thermal modulator is associated with the noz... | 08/02/2011 |
| 7950761 | Liquid discharging apparatus and method for obtaining a large liquid droplet detection signal A liquid discharging apparatus includes a discharging device, a liquid receiving device, a voltage applying device, an electrical change detection device, a driving signal generating device, and a control device. The discharging device discharges liquid from a nozzl... | 05/31/2011 |
| 7934786 | Liquid ejecting apparatus and method of driving liquid ejecting head A liquid ejecting apparatus includes a liquid ejecting head including pressure generation chambers communicating with nozzle openings for ejecting a liquid and pressure generation units which cause pressure variations in the pressure generation chambers. A driving u... | 05/03/2011 |
| 7891750 | Ink-droplet ejecting apparatus A driving pulse signal for forming one dot includes a first, a second, and a third main pulses applied intermittently with an intervals to eject an ink droplet, and a stabilizing pulse which is inserted between the main pulses, and which suppresses a residual vibrat... | 02/22/2011 |
| 7878611 | Drive device of liquid ejection head and liquid ejection apparatus A drive device drives a liquid ejection head that ejects recording liquid droplets from nozzles as a result of drive signal voltages being applied to drive elements. The drive device includes a transfer unit that transfers and outputs printing data and an output uni... | 02/01/2011 |
| 7866777 | Liquid ejecting apparatus and method for controlling same A liquid ejecting apparatus includes a liquid ejecting head having a pressure chamber communicating with a nozzle opening and a pressure generator capable of causing pressure fluctuation to liquid in the pressure chamber, the liquid ejecting head causing pressure fl... | 01/11/2011 |
| 7857406 | Inkjet head driving apparatus and driving method An inkjet head driving apparatus which drives an inkjet head for use in gradation printing which is performed to cause a capacity of each of a plurality of pressure chambers filled with ink to be changed by a drive pulse applied to an actuator, an ink drop to be emi... | 12/28/2010 |
| 7850267 | Method of controlling drive of function liquid droplet ejection head; function liquid droplet ejection apparatus; electro-optic device; method of manufacturing LCD device, organic EL device, electron emission device, PDP device, electrophoretic display device, color filter, organic EL; method of forming spacer, metallic wiring, lens, resist, and light diffusion body In a method of controlling drive of a function liquid droplet ejection head in which a plurality of nozzle arrays are arranged, the nozzle arrays have function liquid droplet ejection amounts which are different from each other per unit nozzle. The drive of the plur... | 12/14/2010 |
| 7845747 | Printhead with sub-ejection pulse for non-firing nozzles A printhead IC comprising: an array of nozzles; and, drive circuitry for receiving print data and sending drive pulses to the nozzles in accordance with the print data; wherein, the drive pulses consist of ejection pulses with sufficient energy to eject printing flu... | 12/07/2010 |
| 7841679 | Liquid ejection apparatus and liquid ejection method The invention achieves efficient use of generation circuits of drive signals COM. The invention provides a liquid ejection method that includes: causing a certain drive signal generation unit to generate a first drive signal and a ... | 11/30/2010 |
| 7819492 | Image processing apparatus, image processing method and computer-readable recording medium of image processing method An image forming apparatus includes an image process control unit processing an image data and generating a control signal, and a drive pattern generation unit to generate a drive pattern to drive a recording head, based on the control signal, the drive pattern gene... | 10/26/2010 |
| 7802864 | Driving method and driving device of inkjet head An inkjet recording apparatus includes actuators provided in an inkjet head, and a drive voltage generator that drives each actuator. The drive voltage generator is configured to set the cycle time Tc, the drop cycle Td, the number of ink droplets N for a maximum to... | 09/28/2010 |
| 7802865 | Ink jet printing apparatus and ink jet printing method The present invention provides an ink jet printing apparatus and an ink jet printing method which are capable of stabilizing the amount of ink ejection and of printing a high-definition image by selecting a driving condition with heat conductivity of an electrotherm... | 09/28/2010 |
| 7794034 | Image formation apparatus An image formation apparatus is disclosed, wherein a time interval between a first ink drop and a second ink drop is set at 1.5×Tc, a time interval between the second ink drop and a third ink drop is set at 1.5×Tc, and a time interval between the third ink drop an... | 09/14/2010 |
| 7770991 | Method of controlling the print quality for an inkjet printer and a printer which functions to perform this method A method and system for application in an inkjet printer containing a substantially closed ink duct in which ink is situated, said duct being operationally connected to an electromechanical transducer, the method including the steps of: actuating the transducer with... | 08/10/2010 |
| 7748812 | Liquid jet apparatus and driving method for liquid jet apparatus A liquid jet apparatus according to the present invention includes a drive waveform generator adapted to generate a drive waveform signal, a modulator adapted to execute pulse modulation on the drive waveform signal, a digital power amplifier adapted to power-amplif... | 07/06/2010 |
| 7748810 | Image processing device, calibration table generator, image processing method, program product, and test pattern An image processing device includes a calibrator that calibrates a pixel value of a pixel in image data. An output interface outputs to an image output device the image data calibrated by the calibrator, the image output device forming an image in accordance with th... | 07/06/2010 |
| 7748811 | Liquid jet apparatus A liquid jet apparatus includes a liquid jet head and a driving signal generating circuit. The driving signal generating circuit generates driving signals including ejection pulses to control the ejection of liquid droplets. A first driving signal is supplied to a f... | 07/06/2010 |
| 7735947 | Droplet ejecting apparatus and droplet ejecting method In a droplet ejecting system, after an ink droplet is ejected a reverberation pressure change is amplified to obtain an appropriate amount of reverberation pressure change, and the ink droplet is reliably separated from a meniscus when ejecting the ink droplet. To t... | 06/15/2010 |
| 7717530 | Liquid jet apparatus and printing apparatus A liquid jet apparatus of the invention includes a drive waveform generator that generates a drive waveform signal, a modulator that pulse-modulates the drive waveform signal so as to produce a modulated signal, a digital power amplification circuit that amplifies t... | 05/18/2010 |
