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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 14191. Отображено 100.

05-01-2012 дата публикации

Droplet ejection device and droplet ejection method

Номер: US20120001970A1

Автор: Hitoshi Satoh

Принадлежит: Sharp Corp

A droplet ejection device in which cavitation is prevented and droplets are favorably ejected includes a nozzle, a liquid chamber communicating with the nozzle and arranged to house a material solution supplied through a liquid supply channel, a piezoelectric vibrator provided to the chamber, and a control mechanism arranged to apply driving voltage to the vibrator, and is arranged to eject droplets of the liquid from the nozzle by increasing and decreasing a volume of the chamber by the vibrator that is deformed in accordance with the voltage that is applied from the control mechanism, wherein the control mechanism is arranged to change the voltage, which is applied to the vibrator when the volume of the chamber is increased so as to suck the liquid into the chamber from the supply channel, in stages such that the volume of the chamber is increased in a plurality of stages.

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Номер записи: 1

12-01-2012 дата публикации

Liquid ejecting apparatus and control method

Номер: US20120007906A1

Автор: Junhua Zhang

Принадлежит: Seiko Epson Corp

A liquid ejecting apparatus includes: a liquid ejecting head that includes nozzle openings through which liquid is ejected and pressure generation units that cause changes in pressure of the liquid inside pressure generation chambers communicating with the nozzle openings; a control unit that supplies a driving signal for causing the liquid ejecting head to eject the liquid, to the pressure generation units, and controls ejection of the liquid by the liquid ejecting head; and a temperature detection unit that detects a temperature of a contact portion with which the liquid ejected by the liquid ejecting head comes in contact, wherein the control unit corrects the driving signal on the basis of the temperature information detected by the temperature detection unit.

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Номер записи: 2

01-03-2012 дата публикации

Power supply device and recording apparatus including the device

Номер: US20120049632A1

Автор: Katsumi Taguchi, Takashi Sato

Принадлежит: Canon Inc

A power supply device which supplies power through a power supply line to a device, the power supply device including a first voltage generation unit which generates first DC voltage and supplies the first DC voltage to the power supply line, a second voltage generation unit which generates second DC voltage that is lower than the first DC voltage and supplies the second DC voltage to the power supply line; and a control unit which stops the power supply by the second voltage to the power supply line and causes the power supply by the first voltage to the power supply line in case where the voltage of the power supply line reaches a predetermined voltage.

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Номер записи: 3

01-03-2012 дата публикации

Ring Electrode for Fluid Ejection

Номер: US20120050414A1

Автор: Christoph Menzel, Mats Ottosson, Paul A. Hoisington

Принадлежит: Fujifilm Corp

Methods, systems, and apparatus for drive a pumping chamber of a fluid ejection system are disclosed. In one implementation, the actuator for drive the pumping chamber includes a continuous piezoelectric layer between a pair of drive electrodes and a continuous reference electrode. The pair of drive electrodes includes an inner electrode and an outer electrode surrounding the inner electrode. The actuator is further coupled to a controller which, during a fluid ejection cycle, applies a negative voltage pulse differential to the outer electrode to expand the pumping chamber for a first time period, then applies another negative voltage pulse differential to the inner electrode during a second time period after the first time period to contract the pumping chamber to eject a fluid drop.

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Номер записи: 4

15-03-2012 дата публикации

Image forming apparatus, image forming method, and recording medium

Номер: US20120062630A1

Автор: Jun Watanabe

Принадлежит: Ricoh Co Ltd

An image forming apparatus includes a driving part driving a recording head; a signal generation part generating a common driving signal; and a transfer part transferring image data and control data to the driving part. The driving part includes a storage part capturing mask pattern transfer data to mask a predetermined one or more of different driving signals of the common driving signal provided by the signal generation part, the mask pattern transfer data being included in the control data; and a latching part latching the mask pattern transfer data, generating a signal to mask the common driving signal, and selectively performing one of control operations other than latching on the stored mask pattern transfer data, based on the combination of the value of the mask pattern transfer data and the value of a mask pattern transfer clock signal, when the latching part is caused to enter a latching state.

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Номер записи: 5

05-04-2012 дата публикации

Method of compensating for dead nozzles in stationary pagewidth printhead

Номер: US20120081435A1

Автор: Emma Rose Kerr, Gregory John McAvoy, Misty Bagnat, Ronan Padraig Sean O'reilly, Vincent Patrick Lawlor

Принадлежит: SILVERBROOK RESEARCH PTY LTD

A method of compensating for a dead nozzle in a stationary pagewidth printhead. The method includes the steps of: (i) identifying the dead nozzle; (ii) selecting a functioning nozzle in a same nozzle row as the dead nozzle; and firing ink droplets from the selected functioning nozzle at a primary dot position associated with the dead nozzle.

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Номер записи: 6

05-04-2012 дата публикации

Printhead integrated circuit with printable zone longer than nozzle row

Номер: US20120081473A1

Автор: Emma Rose Kerr, Gregory John McAvoy, Misty Bagnat, Ronan Padraig Sean O'reilly, Vincent Patrick Lawlor

Принадлежит: SILVERBROOK RESEARCH PTY LTD

A printhead integrated circuit (IC) for a stationary pagewidth printhead, includes nozzle rows extending along a longitudinal axis thereof. A length of a printable zone corresponding to the nozzle row is longer than a length of the nozzle row.

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Номер записи: 7

05-04-2012 дата публикации

Printhead integrated circuit having common conductive track fused to nozzle plate

Номер: US20120081474A1

Автор: Emma Rose Kerr, Gregory John McAvoy, Misty Bagnat, Ronan Padraig Sean O'reilly, Vincent Patrick Lawlor

Принадлежит: SILVERBROOK RESEARCH PTY LTD

An inkjet printhead integrated circuit (IC) includes: a substrate having a drive circuitry layer; a plurality of nozzle assemblies disposed on an upper surface of the substrate and arranged in one or more nozzle rows extending longitudinally along the printhead IC; a nozzle plate extending across the printhead IC; and a conductive track fused to the nozzle plate which extends longitudinally along the printhead IC and parallel with the nozzle rows. The conductive track is connected to a common reference plane in the drive circuitry layer via a plurality of conductor posts extending between the drive circuitry layer and the conductive track.

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Номер записи: 8

10-05-2012 дата публикации

Liquid jet head, liquid jet apparatus, and method of driving a liquid jet head

Номер: US20120113174A1

Автор: Osamu Koseki

Принадлежит: SII Printek Inc

A liquid jet head ( 1 ) includes: a channel (CA) surrounded by wall members at least partially formed of a piezoelectric body (PM) that is subjected to polarization processing in one direction; a pair of electrodes (EL) sandwiching the piezoelectric body (PM), for applying an electric field in a direction substantially orthogonal to the one direction; and a drive section (CR) for driving the piezoelectric body (PM) by setting a voltage of one of the pair of electrodes (EL) to a low voltage (Vu) having a small absolute value, and supplying a drive signal (Vs) to another one of the pair of electrodes (EL). The drive section (CR) includes a switching element (SW) for switching the voltage of the one of the pair of electrodes (EL) from the low voltage (Vu) to a high voltage (Vh) having a large absolute value.

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Номер записи: 9

17-05-2012 дата публикации

Crosstalk reduction in piezo printhead

Номер: US20120120138A1

Автор: Andrew L. Van Brocklin, Christopher REIMER, David Pidwerbecki, Neel Banerjee

Принадлежит: Hewlett Packard Development Co LP

Crosstalk in a piezo printhead is reduced by selecting an actuation signal for a nozzle, determining a time delay and a pulse width extension based on adjacent actuation signals of adjacent nozzles, and applying the time delay and pulse width extension to the actuation signal.

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Номер записи: 10

31-05-2012 дата публикации

Discharge energy recovery device and image forming apparatus using same

Номер: US20120133693A1

Автор: Hideaki Iijima

Принадлежит: Ricoh Co Ltd

A discharge energy recovery device to recover discharge energy discharged from a piezoelectric element when the piezoelectric element is driven includes a drive voltage generator to generate a voltage to drive the piezoelectric element; a discharge voltage monitoring unit to monitor a voltage discharged from the piezoelectric element when the piezoelectric element is driven; a first current supplier to supply a current energy to operate a first load circuit when the discharged voltage is equal to or greater than a first voltage that enables driving of the first load circuit, and a second current supplier to supply a current energy to operate a second load circuit when the discharged voltage is less than the first voltage and equal to or greater than a second voltage that enables driving of the second load circuit by monitoring the currently discharged voltage using the discharge voltage monitoring unit.

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Номер записи: 11

14-06-2012 дата публикации

Liquid ejection apparatus, drive circuit thereof, and drive method thereof

Номер: US20120147075A1

Автор: Mamoru Kimura, Noboru Nitta, Teruyuki Hiyoshi, Tomohisa Yoshimaru

Принадлежит: Toshiba TEC Corp

According to one embodiment, a direct current voltage which has positive and negative potentials relative to a ground potential interposed therebetween is used as a drive voltage for electric charging/discharging to/from an actuator.

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Номер записи: 12

21-06-2012 дата публикации

Printing apparatus and temperature detection method

Номер: US20120154475A1

Автор: Hiroshi Uemura

Принадлежит: Canon Inc

This invention relates to precisely obtaining a head temperature free from influence of a signal transferred to a printhead, without slowing down the printing speed. In a printing apparatus which includes a printhead including a plurality of printing elements and a temperature sensor, and divides the plurality of printing elements into a plurality of blocks to print while performing division driving of the plurality of printing elements for each block, the head temperature is detected as follows. First, one printing period determined by a printhead driving frequency is divided into an active period required for the division driving and an inactive period required for A/D-converting an analog temperature data signal from the temperature sensor. While a signal required to drive the printhead is transferred in the active period, a digital signal A/D-converted from the temperature data signal from the printhead is read in the inactive period.

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Номер записи: 13

09-08-2012 дата публикации

Bubble purging system for a fluid ejection head

Номер: US20120200623A1

Автор: Gregory Alan Long

Принадлежит: Individual

A method and system for purging bubbles from a fluid ejection head comprising a plurality of fluid flow channels including a first plurality of fluid flow channels flowing a first ink to a first actuator device and a second plurality of fluid flow channels for flowing a second ink to a second actuator device. During a bubble purging operation the first and second actuator devices are pulsed with different energies that depend on the viscosity of the first ink and the second ink. Heating the inks with different energies, results in the viscosity of the first ink to be same as the viscosity of the second ink. In one embodiment, a test pattern that includes a plurality of dots is printed to determine a clogged fluid ejection nozzle. Based on the determination, an actuator device corresponding to the clogged fluid ejection nozzle is pulsed.

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Номер записи: 14

16-08-2012 дата публикации

Error detection apparatus of inkjet printer head and error detection method thereof

Номер: US20120206532A1

Автор: Byung Hun Kim, Hyun Ho Shin, Na Rae Park

Принадлежит: Samsung Electro Mechanics Co Ltd

Provided is an error detection apparatus of an inkjet printer head including: an amplification unit connected between a piezoelectric element, which applies pressure to an ink chamber, and a ground to amplify a voltage generated from the piezoelectric element; and a detection unit for detecting whether ink is normally ejected using the voltage amplified by the amplification unit. It is possible to detect whether the inkjet printer head abnormally ejects ink by sensing vibration after ejection of ink using the piezoelectric element.

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Номер записи: 15

06-09-2012 дата публикации

Image forming apparatus, image correcting method, and computer-readable storage medium

Номер: US20120223989A1

Автор: Takashi Kimura, Taku Satoh, Toshihito Kamei, Yasunobu Takagi

Принадлежит: Ricoh Co Ltd

An image forming apparatus includes a recording head including a plurality of nozzles for ejecting recording liquid to perform image formation on a recording medium; and a correcting unit. The correcting unit is configured to divide the recording head by different division patterns each indicating that the recording head is divided into a plurality of segments by at least one different dividing point, correct input and output characteristics for each of the segments in each division pattern to calculate correction effect of the each division pattern, and determine one of the division patterns based on the calculated correction effects of the division patterns as a specified division pattern to correct input and output characteristics of the recording head.

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Номер записи: 16

13-09-2012 дата публикации

Liquid ejection head and liquid ejection apparatus

Номер: US20120229553A1

Автор: Haruhisa Uezawa, Hiroshige Owaki

Принадлежит: Seiko Epson Corp

A liquid ejection head includes a nozzle plate on which nozzle openings for ejecting liquid are provided, a flow path formation substrate on which pressure generation chambers communicating with the nozzle openings are provided, communicating portions in which the liquid to be supplied to the pressure generation chambers is stored, and piezoelectric elements which generate pressure change in the liquid in the pressure generation chambers. In the liquid ejection head, a thermistor is arranged on a surface of the flow path formation substrate at an opposite side to the nozzle openings and one lead wiring of the thermistor is connected to wiring layers which are formed on the surface of the flow path formation substrate in a state where one side ends of the wiring layers face to the communicating portions.

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Номер записи: 17

20-09-2012 дата публикации

Capacitive load drive circuit, fluid ejection device and medical device

Номер: US20120236051A1

Автор: Atsushi Oshima, Hiroyuki Yoshino, Kunio Tabata, Noritaka Ide

Принадлежит: Seiko Epson Corp

Operation of a digital power amplifier for power amplification of a modulated signal is stopped in a period in which a voltage value of a drive signal applied to a capacitive load is constant, to thereby suppress power loss. The power amplification is stopped either when half a period of time when the modulated signal in a first voltage state maintains the first voltage state elapses or when half a period of time when the modulated signal in a second voltage state which is lower in voltage than the first voltage state maintains the second voltage state elapses. Accordingly, when electric current does not flow in a inductor of a low pass filter, it is possible to stop the power amplification. Thus, it is possible to prevent generation of voltage fluctuation in the drive signal due to an electromotive force caused by a self-induction phenomenon of the inductor.

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Номер записи: 18

20-09-2012 дата публикации

Liquid ejection apparatus

Номер: US20120236056A1

Автор: Yuichi Ito

Принадлежит: Brother Industries Ltd

A liquid ejection apparatus comprises a head, a conveyor, an image dot controller, a determiner and a non-image dot controller. The determiner determines whether an image dot non-forming period is equal to or longer than a predetermined time period. The non-image dot controller controls the head so that each ejection opening, whose image dot non-forming period is equal to or longer than the predetermined time period, ejects liquid once within a non-image dot forming period in the image dot non-forming period, to form on a recording medium a non-image dot, the non-image dot forming period being a period from a third time point which is after the first time point to a second time point which is the predetermined time period after the first time point, and that a plurality of the non-image dots structured by the liquid ejected from the ejection openings are scattered in a conveyance direction.

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Номер записи: 19

27-09-2012 дата публикации

Liquid ejecting head and liquid ejecting apparatus

Номер: US20120242739A1

Автор: Hiroshige Owaki

Принадлежит: Seiko Epson Corp

A liquid ejecting head includes a flow channel forming substrate made of silicon and having pressure generating chambers that communicate with nozzles through which liquid is ejected, a piezoelectric elements that is disposed on the flow channel forming substrate so as to oppose the pressure generating chambers and varies a pressure of a liquid in the pressure generating chambers, and a protective substrate which has a holding section that houses the pressure generating unit and is bonded to a side of the flow channel forming substrate where the pressure generating unit is disposed, and the flow channel member is made of silicon and is provided with a thermistor that is disposed on a side of the flow channel member opposite to the flow channel forming substrate.

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Номер записи: 20

27-09-2012 дата публикации

Ink-jet head

Номер: US20120242763A1

Автор: Cheng Ming Chang, Hao Jan Mou, Hsien Chung Tai, Rong Ho Yu, Ta Wei Hsueh, Wen Hsiung Liao, Ying Lun Chang, Yung Lung Han

Принадлежит: Microjet Technology Co Ltd

The present invention related to an ink-jet head, adaptive for an ink cartridge including two ink tanks, the ink-jet head includes: a nozzle board, having a plurality of nozzles; and an ink-jet chip, being used for controlling the ink-jetting and having a total area region consisting of a length and a width, wherein the total area region includes: a non-wiring region, where two ink flow channels being installed therein; and a wiring region, where an internal circuit being installed therein; wherein the internal circuit includes a plurality of ink-jet unit sets, and every ink-jet units of the plurality of ink-jet unit sets include a heater installed correspondingly to the nozzle; wherein the area of the wiring region of the ink-jet chip is less than 77% of the area of the total area region of the ink-jet chip.

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Номер записи: 21

25-10-2012 дата публикации

Printing method and printer

Номер: US20120268543A1

Автор: Kunio Omura, Yasuhiro Yamagata

Принадлежит: Seiko Epson Corp

A printing method for printing bars in a barcode by forming dots on a print medium. The method includes dividing the bars of the barcode into a plurality of segments, forming the dots such that a portion of bars in a first segment are shifted a predetermined direction relative to a portion of bars in a second segment, and printing the barcode by forming dots in each of the plurality of segments. The predetermined direction can be towards a least significant digit of information represented by the barcode when the barcode is seen from the front. In one embodiment, the plurality of segments equals three. Other printing methods, as well as printers for performing the methods, are also provided.

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Номер записи: 22

01-11-2012 дата публикации

Duplex printer with internal hard drive

Номер: US20120274956A1

Автор: Kia Silverbrook, Paul Lapstun

Принадлежит: SILVERBROOK RESEARCH PTY LTD

A duplex color printer includes a pair of print engines mounted in an opposed manner to define a print media feed path therebetween, each print engine including a printhead and a transfer roller for receiving ejected ink from the printhead; a pair of print media trays mounted on either side of the body for respectively containing print media; a print media feed arrangement for feeding print media from one of the trays along the print media path into the other one of the trays; an internal hard drive for locally storing pre-rasterized documents; an interface for facilitating user selection of a locally stored pre-rasterized document for printing by the pair of print engines; and a cleaning station provided in each print engine. Each cleaning station includes a resilient wiper and an absorbent sponge. The resilient wiper is provided downstream of the absorbent sponge with respect to the transfer roller.

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Номер записи: 23

08-11-2012 дата публикации

Rapid ink-charging of a dry ink discharge nozzle

Номер: US20120282840A1

Автор: Conor F. Madigan, Eliyahu Vronsky

Принадлежит: Kateeva Inc

The present teachings relate to methods and apparatus for depositing one or more materials (e.g., one or more films, such as one or more solids) on one or more substrates, which may form part of an OLED or other type(s) of display. In some embodiments, the disclosure relates to apparatus and methods for depositing ink on one or more substrates. The apparatus can include, for example, one or more chambers for receiving ink, and plural orifices configured for ejecting droplets of the ink. The ejected droplets of ink can be received at unique, spaced-apart locations. In some embodiments, a single liquid ink-holding chamber, which includes plural orifices (e.g., three), receives ink in liquid form having a plurality of dissolved or suspended particles, and droplets of the ink are ejected substantially simultaneously to respective, spaced-apart locations on one or more substrates.

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Номер записи: 24

15-11-2012 дата публикации

Fluid discharge device, nozzle inspection method, and medium on which nozzle inspection program is recorded

Номер: US20120287186A1

Автор: Hirokazu Nunokawa, Noriaki Yamashita, Ryoichi Tanaka, Ryosuke TSUCHIHASHI, Teruaki Kaieda

Принадлежит: Seiko Epson Corp

To reduce the number of nozzles in an unstable state after a nozzle inspection, a fluid discharge device includes a discharge head capable of discharging a fluid from nozzle, a nozzle inspection process for inspecting a state of discharging of the fluid from the nozzle, and a controller for subjecting the nozzle to a pre-process for discharging the fluid under a discharge condition that a nozzle in an unstable state be put into a dot omission state, subsequently discharging the fluid for the sake of inspection, and executing an inspection process by the nozzle inspection part.

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Номер записи: 25

22-11-2012 дата публикации

Apparatus and method for measuring drop volume

Номер: US20120296581A1

Автор: Fusheng Xu, James Beachner, Jing Zhou

Принадлежит: Xerox Corp

A computer-based apparatus, including: a memory element storing computer readable instructions; a processor; and a source element to expel a first plurality of drops of a substance with a known density through a medium, and under a set of conditions. The processor executes the computer readable instructions to calculate uncalibrated volumes for the first plurality of drops using respective images of drops in the first plurality of drops. The source element expels a second plurality of drops of the first substance through the medium, and under the first conditions. The processor executes the computer readable instructions to: calculate, using a weight for the second plurality of drops and the known density, actual volumes for the second plurality of drops; and generate, using uncalibrated volumes and the actual volumes, an equation to modify the uncalibrated volumes to match the actual volumes.

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Номер записи: 26

20-12-2012 дата публикации

Liquid discharge device, testing method, and medium with recorded program

Номер: US20120320120A1

Автор: Osamu Shinkawa, Toshiyuki Suzuki

Принадлежит: Seiko Epson Corp

There is provided a technique with which an abnormal discharge state in a discharge component can be determined on the basis of residual vibration. A printer includes a discharge component that discharges ink, a detector that detects residual vibration in the discharge component, and a tester that tests the discharge component on the basis of the change in the period of the residual vibration.

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Номер записи: 27

27-12-2012 дата публикации

Inkjet recording apparatus and inkjet recording method

Номер: US20120327149A1

Автор: Yoshiaki Mochizuki

Принадлежит: Toshiba TEC Corp

According to one embodiment, an inkjet recording apparatus includes a head body, electrodes, a nozzle plate and a control section. The control section is electrically connected to the electrodes and applies an ejection pulse or a non-ejection pulse to the electrodes. The ejection pulse includes a first voltage change process for increasing the volume of a pressure chamber and a second voltage change process for reducing the volume of the pressure chamber, has width equal to or larger than 0.95 times and equal to or smaller than 1.05 times of a pressure propagation time in the pressure chamber, and ejects the ink from a nozzle. The non-ejection pulse has width equal to or larger than 0.2 times and equal to or smaller than 0.34 times of the width of the ejection pulse and stops the ink in the nozzle.

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Номер записи: 28

17-01-2013 дата публикации

Driving device for driving liquid delivery head, recording apparatus, and recording method

Номер: US20130016146A1

Автор: Takuji Hashiguchi

Принадлежит: Kyocera Corp

A driving device, and a liquid discharge head and a recording apparatus using the driving device are provided which permit precise printing under various conditions. The driving device includes a latch signal generation circuit for generating a latch signal every Tc seconds; a delay time retention circuit for retaining data of delay times of less than Tc seconds; a plurality of first latch circuits which are capable of retaining one-line pixel data, and latch pixel data from outside by the latch signal; a plurality of second latch circuits which are divided into a plurality of second latch circuit groups, and latch pixel data retained in the plurality of first latch circuits after the delay time of data retained in the delay time retention circuit for each of the second latch circuit groups is passed after the latch signal is transmitted; and a driving signal transmission circuit.

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Номер записи: 29

17-01-2013 дата публикации

Liquid droplet ejecting head, ink cartridge, and image forming apparatus

Номер: US20130016152A1

Автор: Kiyoshi Yamaguchi, Yusuke Nonoyama

Принадлежит: Ricoh Co Ltd

A liquid droplet ejecting head is disclosed, including a nozzle hole which ejects liquid droplets; an ejecting liquid chamber which is in communication with outside via the nozzle hole and which contains an ejecting liquid to be the liquid droplets; a pressure generating unit which generates pressure within the ejecting liquid chamber; a temperature detecting unit which detects temperature at a location at which is arranged a temperature measuring resistive body; and a pressure control unit which controls an output of the pressure generating unit based on detected results of the temperature detecting unit, wherein the pressure generating unit is configured to increase pressure within the ejecting liquid chamber, so that the ejecting liquid within the ejecting liquid chamber is ejected from the nozzle hole as the liquid droplets, and wherein the temperature measuring resistive body is arranged at the ejecting liquid chamber forming member.

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Номер записи: 30

31-01-2013 дата публикации

Fluid discharging device

Номер: US20130025534A1

Автор: Takumi Nakano

Принадлежит: Unicharm Corp

A fluid discharging device that discharges fluid from a plurality of discharge openings towards a continuous sheet member which is continuously transported in a transporting direction. The fluid discharging device includes: a plurality of valves that correspond to the discharge openings and intermittently discharge the fluid from the discharge openings by opening and closing operations; and a controller that controls the opening and closing operations of each of the valves individually depending on a transportation amount of the continuous sheet member. The controller calculates a shared compensation value that is represented by a value indicating the transportation amount, based on a transport velocity of the continuous sheet member. The controller shifts an open-close timing of at least several valves of the plurality of valves from a previously-determined open-close timing, based on the shared compensation value.

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Номер записи: 31

31-01-2013 дата публикации

Liquid ejecting apparatus and method of controlling liquid ejecting apparatus

Номер: US20130027453A1

Автор: Masako Fukuda, Satoshi Kimura, Tomohiro Sayama

Принадлежит: Seiko Epson Corp

A CPU serving as a counting unit counts the cumulative number of times a driving pulse is applied to a piezoelectric vibrator. A driving signal generation unit is able to generate an aging driving pulse set by a driving parameter to the extent that ink is not ejected from a nozzle and performs an aging process of driving the piezoelectric vibrator using the aging driving pulse set by a driving parameter in accordance with a cumulative number of applications in a region outside an ejection region on a recording medium.

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Номер записи: 32

31-01-2013 дата публикации

Drive circuit for inkjet recording head, and inkjet recording device

Номер: US20130027474A1

Автор: Kaoru Satoh

Принадлежит: Ricoh Co Ltd

A drive circuit for an inkjet recording head includes a plurality of electrically capacitive actuator elements, a drive signal source, a plurality of switching elements, and a plurality of resistances. The actuator elements are provided for a plurality of nozzles, and drive the nozzles to eject ink therefrom. The drive signal source outputs a drive signal for driving the actuator elements. The switching elements are connected to the respective actuator elements to separately drive the actuator elements, and selectively apply the output drive signal to the actuator elements. The resistances are provided for the respective actuator elements, and are connected to low potential sides of the actuator elements. Each of the resistances has a resistance value adjusted in accordance with the length of a wire between the corresponding one of the actuator elements and the drive signal source.

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Номер записи: 33

21-02-2013 дата публикации

Polarity switching circuit

Номер: US20130043765A1

Автор: Shih-Chang Chen

Принадлежит: Microjet Technology Co Ltd

A polarity switching circuit includes: a first current-limiting resistor and a second current-limiting resistor connected to a DC high voltage; a first transistor switch, a second transistor switch, a fourth transistor switch, and a fifth transistor switch respectively controlled by a first PWM signal and a second PWM signal; a third transistor and a sixth transistor switch whose control terminals are respectively connected to the first transistor switch and the fourth transistor switch; a first filter connected to the second transistor switch and the third transistor switch and a contact of a piezoelectric actuator; and a second filter connected to the fifth transistor switch and the sixth transistor switch and another contact of the piezoelectric actuator. When the first and the second PWM signal are switching between a high level and a low level, output AC voltages with smoothed AC waveforms are supplied to the contacts of the piezoelectric actuator.

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Номер записи: 34

07-03-2013 дата публикации

Image processing method, image processing program, and information processing apparatus

Номер: US20130057879A1

Автор: Masanori Hirano, Toshihito Kamei, Yasunobu Takagi

Принадлежит: Ricoh Co Ltd

A method including the steps of obtaining an original image, generating a converted image by converting a gradation of a pixel of the original image into a prescribed gradations for an image forming apparatus to express, outputting a dot pattern image through a nozzle based on a predetermined dot pattern signal, generating nozzle characteristic information of the nozzle based on the dot pattern image, generating simulation information based on the converted image and the nozzle characteristic information, generating converted simulation information by converting the simulation information to the same gradation as that of the pixel of the original image, comparing the converted simulation information with the original image, and calculating an error between the original image and the converted simulation information.

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Номер записи: 35

14-03-2013 дата публикации

Image forming apparatus including recording head for ejecting liquid droplets

Номер: US20130063507A1

Автор: Shino Sasaki

Принадлежит: Ricoh Co Ltd

An image forming apparatus includes a recording head, a head driving control unit, and a dummy ejection control unit. The dummy ejection control unit controls first dummy ejection operation to eject droplets to a continuous medium per a constant length and second dummy ejection operation to eject droplets not contributing to image formation to an image formation area. In the first dummy ejection operation, the head driving control unit applies a first non ejection pulse to a pressure generator corresponding to a non ejection nozzle. In the second dummy ejection operation, the head driving control unit applies a second non ejection pulse to the pressure generator corresponding to the non ejection nozzle. When the second non ejection pulse is applied, an amplitude or number of vibrations of a meniscus of liquid in the non ejection nozzle is greater than when the first non ejection pulse is applied.

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Номер записи: 36

14-03-2013 дата публикации

Driving method and apparatus of an ink jet head

Номер: US20130063508A1

Автор: Takashi Norigoe

Принадлежит: Toshiba TEC Corp

According to one embodiment, a driving method of an ink jet head includes applying a first pulse for expanding volume of a pressure chamber in which an ink is accommodated to an actuator for applying oscillation to the pressure chamber and applying a second pulse for reducing volume of the pressure chamber to the actuator immediately before ink drops discharged from a nozzle which is communicated with the pressure chamber are separated from the nozzle.

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Номер записи: 37

14-03-2013 дата публикации

Liquid ejecting apparatus

Номер: US20130063509A1

Автор: Hirokazu Nunokawa, Satoru Hosono, Shuji Yonekubo, Toshihisa Saruta, Yoshiko Hoshiyama

Принадлежит: Seiko Epson Corp

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 first level-data setting unit for setting a selected first level data from a plurality of first level data, based on an ejecting data for a first kind of liquid; a second level-data setting unit for setting a selected second level data from a plurality of second level data, based on an ejecting data for a second kind of liquid; a driving-signal generator for generating a driving signal; and a driving-pulse generator for generating a driving pulse based on the selected first or second level data and the driving signal. The plurality of first level data and the plurality of second level data are different from each other.

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Номер записи: 38

18-04-2013 дата публикации

Element substrate, printhead and printing apparatus

Номер: US20130093808A1

Автор: Hideo Kanno, Nobuyuki Hirayama

Принадлежит: Canon Inc

An element substrate, comprising a first resistance element and second resistance element each of which includes a first terminal and a second terminal and is arranged in a predetermined direction, wherein the first terminals are connected to a first line for commonly supplying a current, and the second terminals are connected to a second line for commonly supplying a current, and a detection unit configured to detect a voltage of the first terminal of the first resistance element and a voltage of the first terminal of the second resistance element while power is supplied to the first resistance element and is not supplied to the second resistance element.

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Номер записи: 39

18-04-2013 дата публикации

LIQUID EJECTING APPARATUS AND METHOD FOR CONTROLLING LIQUID EJECTING APPARATUS

Номер: US20130093811A1

Автор: KAIEDA Teruaki, TANAKA Ryoichi

Принадлежит: SEIKO EPSON CORPORATION

A liquid ejecting apparatus includes a liquid ejecting head having a nozzle that ejects liquid and a pressure chamber in communication with the nozzle. A pressure generator causes pressure fluctuation in the liquid retained in the pressure chamber. The liquid ejecting head is capable of ejecting the liquid from the nozzle as a result of operation of the pressure generator. A driving signal generating section generates a driving signal having an ejection pulse for driving the pressure generator to eject the liquid from the nozzle. The ejection pulse is a voltage waveform four waveform portions having, respectively, voltage levels V V V and V that satisfy the following conditions (A) and (B). 1. A method for controlling a liquid ejecting apparatus that includes a liquid ejecting head , a driving signal generating section , and a moving section , the liquid ejecting head including a nozzle from which liquid is ejected , a pressure chamber that is in communication with the nozzle , and a pressure generator that causes pressure fluctuation in the liquid retained in the pressure chamber , the liquid ejecting head being capable of ejecting the liquid from the nozzle as a result of operation of the pressure generator , the driving signal generating section generating a driving signal that contains an ejection pulse for driving the pressure generator to eject the liquid from the nozzle , the moving section moving the liquid ejecting head and a liquid ejection target medium relative to each other , the liquid ejection target medium being a target on which the ejected liquid lands , the method comprising:moving the liquid ejecting head and the liquid ejection target medium relative to each other; andejecting the liquid from the nozzle of the liquid ejecting head while performing the relative movement operation so as to cause the liquid to land on the liquid ejection target medium, a first waveform portion in which a voltage level changes in a first direction to cause a change ...

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Номер записи: 40

02-05-2013 дата публикации

PRINTHEAD AND RELATED METHODS AND SYSTEMS

Номер: US20130106961A1

Автор: Nikkel Eric L., Van Brocklin Andrew L.

Принадлежит:

A printhead includes a moveable membrane, a piezoelectric actuator to move the membrane, and electronic circuitry disposed on the moveable membrane. A method of fabricating a printhead includes fabricating CMOS circuitry on a first side of a circuit wafer, and forming a chamber in a second side of the circuit wafer such that a bottom of the chamber forms a moveable membrane and the CMOS circuitry is disposed on the moveable membrane opposite the bottom of the chamber. A printing system includes a printhead having CMOS circuitry formed on a first side of a moveable membrane, a chamber having a bottom comprising a second side of the moveable membrane, and a piezoelectric actuator formed over the CMOS circuitry, configured to cause displacement of the moveable membrane into the chamber. 1. A printhead comprising:a moveable membrane;a piezoelectric actuator to move the membrane; andelectronic circuitry disposed on the moveable membrane.2. A printhead as in claim 1 , wherein the electronic circuitry is disposed between the piezoelectric actuator and the membrane.3. A printhead as in claim 1 , wherein the moveable membrane is a moveable portion of a circuit wafer claim 1 , the printhead further comprising:electronic circuitry disposed on a static portion of the circuit wafer.4. A printhead as in claim 1 , wherein the electronic circuitry comprises output drivers to drive the piezoelectric actuator.5. A printhead as in claim 1 , wherein the electronic circuitry comprises a sensor configured to sense movement of the membrane.6. A printhead as in claim 5 , wherein the sensor is a strain gauge resistor configured to indicate strain in the crystal lattice of silicon through a change in resistance.7. A method of fabricating an inkjet printhead comprising:fabricating CMOS circuitry on a first side of a circuit wafer; andforming a chamber in a second side of the circuit wafer such that a bottom of the chamber forms a moveable membrane and the CMOS circuitry is disposed on the ...

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Номер записи: 41

30-05-2013 дата публикации

Ink jet printing apparatus and method for controlling ink jet printing apparatus

Номер: US20130135380A1

Автор: Hirokazu Yoshikawa, Hiroshi Taira, Kenichi Oonuki, Kiichiro Takahashi, Toshiyuki Chikuma, Wakako Tanaka

Принадлежит: Canon Inc

An ink jet printing apparatus including a plurality of print heads and a method for controlling the ink jet printing apparatus are provided which allows ink ejection to be immediately started. If temperatures of both a first print head and a second print head have become equal to or higher a reference temperature at least once, a printing operation or a preliminary ejection operation using the first print head and the second print head is started even when one of the temperature of the first print head and the temperature of the second print head is lower than the reference temperature.

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Номер записи: 42

06-06-2013 дата публикации

LIQUID EJECTING HEAD, LIQUID EJECTING APPARATUS, AND PIEZOELECTRIC ELEMENT

Номер: US20130141495A1

Автор: ITAYAMA Yasuhiro

Принадлежит: SEIKO EPSON CORPORATION

An electrode is provided with a lanthanum nickelate film which is formed through a chemical solution deposition method using a lanthanum nickelate film forming composition which is obtained by heating a mixed solution obtained by mixing at least lanthanum acetate, nickel acetate, acetic acid, and water, a piezoelectric layer is provided on the lanthanum nickelate film and is formed of a complex oxide having a perovskite structure which contains at least Pb, Ti, and Zr, and a half-width (θ) of a peak derived from a (100) plane and/or a peak derived from a (001) plane measured using an X-ray rocking curve method is 6.0 degrees or less. 1. A liquid ejecting head comprising:a piezoelectric element which is provided with a piezoelectric layer and an electrode provided on the piezoelectric layer,wherein the piezoelectric layer is provided above a lanthanum nickelate film, and is formed of a complex oxide having a perovskite structure which contains at least Pb, Ti, and Zr, and a half-width (θ) of a peak derived from a (100) plane and/or a peak derived from a (001) plane measured using an X-ray rocking curve method is 6.0 degrees or less.2. A liquid ejecting apparatus comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'the liquid ejecting head according to .'}3. A piezoelectric element comprising:a piezoelectric layer; andan electrode which is provided on the piezoelectric layer,wherein the piezoelectric layer is provided above a lanthanum nickelate film, and is formed of a complex oxide having a perovskite structure which contains at least Pb, Ti, and Zr, and a half-width (θ) of a peak derived from a (100) plane and/or a peak derived from a (001) plane measured using an X-ray rocking curve method is 6.0 degrees or less. The entire disclosure of Japanese Patent Application No. 2011-264139, filed Dec. 1, 2011 is incorporated by reference herein.1. Technical FieldThe present invention relates to a liquid ejecting head, a liquid ejecting apparatus, and a ...

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Номер записи: 43

20-06-2013 дата публикации

LIQUID EJECTING APPARATUS AND LIQUID EJECTING METHOD

Номер: US20130155134A1

Автор: OZAWA Kinya

Принадлежит: SEIKO EPSON CORPORATION

A liquid ejecting apparatus includes: a pressure chamber that communicates with a liquid supply section and a nozzle; an element that changes a pressure of liquid within the pressure chamber; and an ejection pulse generation section that generates an ejection pulse for operating the element to eject the liquid from the nozzle. The viscosity of the liquid is not less than 8 millipascal seconds. The nozzle has a first portion in which a liquid ejection side thereof has a smaller opening area than a pressure chamber side thereof, and a second portion which communicates with an ejection side end portion of the first portion. The ejection pulse has a depressurizing portion for depressurizing the liquid to attract a meniscus positioned on the second portion to the first portion, and a pressurizing portion for pressurizing the liquid to eject the liquid before the meniscus returns to the second portion. 1. A liquid ejecting apparatus comprising:a pressure chamber that communicates with a liquid supply section and a nozzle;an element that changes a pressure of liquid within the pressure chamber; andan ejection pulse generation section that generates an ejection pulse for operating the element in order to eject the liquid from the nozzle;wherein a viscosity of the liquid is not less than 8 millipascal seconds; a first, tapered portion comprising a first, smaller cross-sectional area at a first, liquid ejection end and a second, larger cross-sectional area at a second, pressure chamber end; and', 'a second portion which communicates with the first end of the first portion, comprising a length in a liquid ejection direction and a width in a cross-sectional direction, wherein the length is smaller than the width; and, 'wherein the nozzle comprises a depressurizing portion for depressurizing the liquid in order to attract a meniscus positioned on the second portion to the first portion, and', 'a pressurizing portion for pressurizing the liquid in order to eject the liquid before ...

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Номер записи: 44

11-07-2013 дата публикации

Printing apparatus control method for printing apparatus

Номер: US20130176357A1

Автор: Hiroshi Tajika, Jun Yasutani

Принадлежит: Canon Inc

Provided is an printing apparatus and temperature detecting method that can accurately obtain temperature of a printing element substrate and output a high-quality image at high resolution and high speed. For this purpose, a first temperature sensor outputting signals through a first output line and a second temperature sensor outputting signals through a second output line that is longer than the first output line are provided on the printing element substrate. In addition, the switch between the case of using detected temperatures obtained from both of the first temperature sensor and the second temperature sensor to calculate the temperature of the printing element substrate, and the case of using only detected temperature obtained from the first temperature sensor to calculate the temperature of a printing element substrate is made. On the basis of this, it is avoided that inaccurate temperature of a printing element substrate is obtained caused of noises.

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Номер записи: 45

18-07-2013 дата публикации

INKJET HEAD AND AN INKJET RECORDING DEVICE

Номер: US20130182024A1

Автор: HIROKI Masashi, Izumi Takao, KADO Takashi, Kaneko Yoshiaki, KITAWAKI Takaya, Kubota Atsushi

Принадлежит: TOSHIBA TEC KABUSHIKI KAISHA

According to one embodiment, the inkjet head of an application example includes a pressure chamber for charging the ink, an actuator for changing the volume of the pressure chamber, a nozzle for discharging the ink inside the pressure chamber when the volume of the pressure chamber is changed, and a controller that, in the formation of one pixel by discharging ink drops from the nozzle, when the elapsed interval from discharging ink drops last time by the nozzle is less than the specified interval, outputs the discharging waveform corresponding to the ink drop number determined for the formation of the pixel, and when the elapsed interval is more than the specified interval, increases the number of ink drop discharge cycles above the number determined for the formation of the pixel. 1. An inkjet head comprising:a pressure chamber for storing and pressurizing an ink charge;an actuator for changing the volume of the pressure chamber according to a discharging waveform;a nozzle for discharging the ink charge stored inside the pressure chamber when the volume of the pressure chamber is decreased by the actuator; anda controller for providing the discharging waveform for controlling the actuator;wherein,the controller sets a number of discharge cycles in the discharging waveform based on a gradation value of a pixel to be printed when an elapsed time interval between the discharging of the ink charge is less than a first specified time interval, andthe controller sets the number of discharge cycles in the discharging waveform to a first number greater than the number set based on the gradation value of the pixel to be printed when the elapsed time interval between the discharging of the ink charge is greater than the first specified time interval.2. The inkjet head according to claim 1 , wherein the elapsed time interval is measured in units of time.3. The inkjet head according to claim 1 , wherein the elapsed time interval is measured in the number of pixels between ink ...

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Номер записи: 46

18-07-2013 дата публикации

IMAGE FORMING APPARATUS

Номер: US20130182025A1

Автор: YANAKA Atsushi

Принадлежит:

According to an embodiment, provided is an image forming apparatus that includes: a print head that includes nozzles ejecting liquid droplets, and pressure generating units for ejecting liquid droplets; a drive waveform generating unit that generates and outputs a drive waveform given to the pressure generating units of the print head; a head drive unit that includes a switch unit connected to each pressure generating units, and a selection unit controlling the switch unit to be turned on and off in accordance with image data; a monitoring unit that monitors intermediate potential of the drive waveform; and a unit that outputs a signal for turning on all the switch units, if the monitoring unit detects that voltage is decreased to lower than a predetermined threshold in an interval between the drive waveform of one drive cycle and the drive waveform of a subsequent drive cycle. 1. An image forming apparatus , comprising: a plurality of nozzles ejecting liquid droplets, and', 'a plurality of pressure generating units generating pressure for ejecting liquid droplets from the nozzles;, 'a print head that includes'}a drive waveform generating unit that generates and outputs a drive waveform given to the pressure generating units of the print head in each drive cycle; a switch unit connected to each of the pressure generating units, to which switch unit the drive waveform is input, and', 'a selection unit controlling the switch unit to be turned on and off in accordance with image data;, 'a head drive unit that includes'}a monitoring unit that monitors intermediate potential of the drive waveform; anda unit that outputs a signal for turning on all of the switch units to the selection unit, if the monitoring unit detects that voltage is decreased to lower than a predetermined threshold in an interval between the drive waveform of one drive cycle and the drive waveform of a subsequent drive cycle.2. The image forming apparatus according to claim 1 , whereinthe drive ...

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Номер записи: 47

18-07-2013 дата публикации

INKJET RECORDING DEVICE AND IMAGE FORMING APPARATUS FOR STABLE INK EJECTION

Номер: US20130182026A1

Автор: Satake Kenichi

Принадлежит: KYOCERA Document Solutions Inc.

An inkjet recording device includes a recording head, a head driving unit, and a controller. A selector of the head driving unit performs selection for individual nozzles so that when the drive waveform selection data for printing one line at this time sent from a data processing section indicates that the number of times of ink ejection is 0, and drive waveform selection data for printing the next one line indicates that the number of times of ink ejection is 0, drive voltage according to none of one or more drive waveforms for ink ejection or a drive waveform for meniscus oscillation is applied to a piezoelectric element. 1. An inkjet recording device comprising: a plurality of nozzles configured to eject ink onto a recording medium;', 'a plurality of pressurizing chambers communicating with the plurality of nozzles and being capable of accommodating the ink therein; and', 'a plurality of piezoelectric elements arranged so as to correspond to the plurality of pressurizing chambers and configured to apply pressure to the ink in the pressurizing chambers to allow the nozzles to eject the ink;, 'a recording head including a drive pulse generating section configured to generate, as drive waveforms of drive voltage for each piezoelectric element, a plurality of drive waveforms including one or more drive waveforms for ink ejection set according to the number of times of ink ejection from the corresponding nozzle and a drive waveform for meniscus oscillation that allows a corresponding nozzle to be subjected to meniscus oscillation without performing ink ejection; and', 'a selector configured to perform selection for each of the nozzles as to whether drive voltage according to any of the one or more drive waveforms for ink ejection and the drive waveform for meniscus oscillation generated in the drive pulse generating section or drive voltage according to none of the one or more drive waveforms for ink ejection or the drive waveform for meniscus oscillation is applied ...

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Номер записи: 48

25-07-2013 дата публикации

LIQUID EJECTING APPARATUS AND MANUFACTURING METHOD THEREOF

Номер: US20130187965A1

Автор: KOBAYASHI Haruki

Принадлежит: SEIKO EPSON CORPORATION

A liquid ejecting apparatus includes a correction section maintains a predetermined voltage range in which a displacement is greater than a predetermined ratio as a drive voltage range from a relationship between each voltage and the displacement when a reference waveform having a process that changes the voltage from a first voltage to a second voltage having a voltage difference and a process that changes the voltage from the second voltage to the first voltage is supplied by making the voltage difference between the first voltage and the second voltage constant and changing the first voltage and the second voltage, and wherein the correction section changes the drive waveform into a drive waveform having a minimum voltage and a maximum voltage defined within the drive voltage range. 1. A liquid ejecting apparatus comprising:a piezoelectric element that has a piezoelectric layer made of non-lead complex oxide and an electrode provided at the piezoelectric layer; anda correction section that controls a drive waveform which is supplied to the piezoelectric element,wherein the correction section maintains a predetermined voltage range in which a displacement is greater than a predetermined ratio as a drive voltage range from a relationship between each voltage and the displacement when a reference waveform having a process that changes the voltage from a first voltage to a second voltage having a voltage difference and a process that changes the voltage from the second voltage to the first voltage is supplied by making the voltage difference between the first voltage and the second voltage constant and changing the first voltage and the second voltage, andwherein the correction section can correct the drive waveform into a drive waveform having a minimum voltage and a maximum voltage defined within the drive voltage range.2. The liquid ejecting apparatus according to claim 1 ,wherein the drive voltage range is a predetermined voltage range which is determined from a ...

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Номер записи: 49

25-07-2013 дата публикации

Liquid Ejecting Apparatus and Liquid Ejecting Method

Номер: US20130187967A1

Автор: Akira Abe

Принадлежит: Seiko Epson Corp

A liquid ejecting apparatus which includes: an origin drive signal generation unit which generates an origin drive signal; a signal modulation unit which modulates the origin drive signal, and makes the origin drive signal as an origin modulation signal; a signal amplification unit which amplifies the origin modulation signal, and makes the origin modulation signal as a modulation signal; a signal conversion unit which converts the modulation signal to a fire drive signal, and a liquid ejecting unit which ejects liquid according to the fire drive signal, in which a frequency of the origin modulation signal, or the fire modulation signal becomes maximum when the origin drive signal is a predetermined value.

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Номер записи: 50

25-07-2013 дата публикации

Printing apparatus

Номер: US20130187969A1

Автор: Katsutoshi Miyahara

Принадлежит: Canon Inc

This invention is made to solve a problem that the power supply cannot be used efficiently because, even when the normally operable ambient temperature of an apparatus is low, the supplied power of the power supply is restricted in consideration of a case in which the ambient temperature is high. To solve this, a temperature sensor measures the temperature of a predetermined portion of a printing apparatus or an ambient temperature. The driving count of printing elements used to print in a region by one scan is compared with a threshold determined in accordance with the measured temperature, and an appropriate printing mode is selected. When the ambient temperature of the printing apparatus is low, a large power can be supplied to the printhead, increasing the efficiency of the power supply.

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Номер записи: 51

25-07-2013 дата публикации

Test Apparatus for Liquid Drop Emission Apparatus

Номер: US20130187975A1

Автор: Koji Kitazawa

Принадлежит: Seiko Epson Corp

A test apparatus for a liquid drop emission apparatus having a plurality of emission mechanisms, the emission mechanisms each having a driving element configured to emit an ink drop from a nozzle, and an application switch coupled with a driving voltage source and the driving element in series, the application switch being configured to switch a driving voltage for emission of a liquid drop between being applied and not being applied to the driving element, the test apparatus including a test switch configured to make each of the emission mechanisms output a test voltage which appears between both ends of the application switch to a test terminal, the test apparatus including a failure deciding section configured to decide whether the emission mechanism is in failure or not on the basis of the test voltage outputted to the test terminal.

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Номер записи: 52

01-08-2013 дата публикации

Driver circuit

Номер: US20130194833A1

Автор: Michael Penberth

Принадлежит: Global Inkjet Systems Ltd

A driver circuit ( 1 ) for driving a capacitive load ( 2 ) with a drive pulse having a rise time, a predetermined voltage period and a fall time. The driver circuit ( 1 ) includes an inductance ( 6 ), switches ( 10, 11, 12 ), and a transformer ( 8 ) having a primary side ( 8 ) and secondary side ( 9 ). The switches ( 10, 11, 12 ) are controlled by a controller ( 13 ) to charge the inductance ( 6 ) from a power supply ( 4 ), and, when the capacitive load ( 2 ) is to be driven, to enable a charge path from the inductance ( 6 ) to the capacitive load ( 2 ) during the rise time, to disable the charge path during the constant peak voltage period and to enable a discharge path via the primary side ( 8 ) of the transformer ( 7 ) during the fall time. As the capacitive load ( 2 ) discharges through the primary side ( 8 ) of the transformer ( 7 ), charge is induced on the secondary side ( 9 ) of the transformer ( 7 ) and is used to charge the inductance ( 6 ), thereby saving power and enabling a lower voltage power supply to be used.

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Номер записи: 53

22-08-2013 дата публикации

IMAGE FORMING APPARATUS

Номер: US20130215173A1

Автор: AKIYAMA Kohta

Принадлежит:

An image forming apparatus includes: and a unit that electrically shuts off a pressure generating unit corresponding to a nozzle ejecting no droplet, from a drive waveform generating unit for a period of a time Tb satisfying a relation Tb≧T and that applies, at a time after the shutoff, a voltage of a potential V to the pressure generating unit, where a potential serving as a reference for the drive waveform is denoted as V a minimum potential difference from the potential V required to displace a pressure generating unit to vibrate a meniscus with ejecting no liquid droplet from a nozzle is denoted as ΔV, a time required for a potential to drop by the potential difference ΔV due to self-discharge after a pressure generating unit is charged to a predetermined potential is denoted as T 1. An image forming apparatus comprising:a print head that is a unit including a plurality of nozzles ejecting droplets of liquid and a plurality of pressure generating units generating pressure to eject the droplets of liquid from the nozzles, the pressure generating units being units in which self-discharge occurs;a drive waveform generating unit that generates a drive waveform applied to each of the pressure generating units in the print head; and{'b': 2', '1, 'a unit that electrically shuts off a pressure generating unit corresponding to a nozzle ejecting no droplet, from the drive waveform generating unit for a period of a time Tb satisfying a relation Tb≧T, and that applies, at a time after the shutoff, a voltage of a potential V to the pressure generating unit corresponding to the nozzle ejecting no droplet, where'}{'b': '1', 'a potential serving as a reference for the drive waveform is denoted as V,'}{'b': 1', '2, 'a minimum potential difference from the potential V required to displace a pressure generating unit to vibrate a meniscus with ejecting no liquid droplet from a nozzle is denoted as ΔV,'}{'b': 2', '2, 'a time required for a potential to drop by the potential ...

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Номер записи: 54

22-08-2013 дата публикации

LIQUID EJECTING APPARATUS

Номер: US20130215174A1

Автор: KONISHI Akio

Принадлежит: SEIKO EPSON CORPORATION

A liquid ejecting apparatus includes a piezoelectric element provided with a piezoelectric layer and an electrode provided on the piezoelectric layer; and a driving unit supplying a driving waveform driving the piezoelectric element to the piezoelectric element. 1. A liquid ejecting apparatus comprising:a piezoelectric element provided with a piezoelectric layer and an electrode provided on the piezoelectric layer; anda driving unit supplying a driving waveform driving the piezoelectric element to the piezoelectric element,wherein the piezoelectric layer is formed of a composite oxide having a perovskite structure including bismuth, iron, barium and titanium,wherein the driving waveform has a waiting process of applying an intermediate potential to the piezoelectric layer, a first voltage changing process of applying a voltage of the opposite polarity to the intermediate potential from the application state of the intermediate potential, and decreasing the potential to the minimum, and a second voltage changing process of applying a voltage greater than the intermediate potential and ejecting a liquid, and increasing the potential to the maximum from the minimum potential, andwherein an electric field applied to the piezoelectric layer by the application of the intermediate potential is 11.1 V/μm or more, and is greater than half of a difference between the maximum potential and the minimum potential in the electric field applied to the piezoelectric layer.2. The liquid ejecting apparatus according to claim 1 , wherein the piezoelectric layer is arranged with priority on a (100) plane.3. The liquid ejecting apparatus according to claim 2 , wherein the minimum potential is converted to the electric field and is −5.6 V/μm or more.4. The liquid ejecting apparatus according to claim 2 , wherein the difference between the maximum potential and the minimum potential in the electric field applied to the piezoelectric layer is 61 V/μm or more.5. The liquid ejecting ...

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Номер записи: 55

12-09-2013 дата публикации

Color measuring method and recording apparatus

Номер: US20130235107A1

Автор: Asako Tomida, Hiroaki Komatsu, Masataka Kato, Masaya Uetsuki, Shin Genta, Taku Yokozawa, Toshimitsu Danzuka, Tsuyoshi Ibe

Принадлежит: Canon Inc

A color measuring method includes: recording color patterns on a sheet by an inkjet head; measuring colors of the color patterns formed on the sheet; and recovering the inkjet head, wherein the recovering is prohibited within a period after the recording and before the measuring.

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Номер записи: 56

19-09-2013 дата публикации

Driving device for capacitance type actuator and driving device for ink jet head

Номер: US20130241349A1

Автор: Noboru Nitta

Принадлежит: Toshiba TEC Corp

An actuator is sequentially charged with output voltage “E/2” of a voltage source and output voltage “E” of a voltage source. After the charging, “Q/2” of electric charge “Q” stored in the actuator is discharged on a path returning to the voltage source. Subsequent to the discharging, the remaining all electric charge “Q/2” stored in the actuator is discharged on a closed circuit.

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Номер записи: 57

19-09-2013 дата публикации

INK-JET RECORDING APPARATUS

Номер: US20130241984A1

Автор: AKUNE Junichirou, FURUNO Kumiko

Принадлежит: KONICA MINOLTA IJ TECHNOLOGIES, INC.

A driving waveform has a first driving waveform (PLSTM1) composed of non-GND waveform, a second driving waveform (PLSTM2) composed of a non-GND waveform different from the first driving waveform, and a third driving waveform (PLSTM0) composed of a GND waveform, and a driving voltage V of the first driving waveform and a driving voltage V of the second driving waveform is |V|>|V|; and the driving circuit selects at least the first driving waveform and the second driving waveform or only the first driving waveform at every predetermined time in 1 pixel cycle in accordance with the discharge data, applies this to one of the two driving electrodes of the pressure generating unit and also applies only the second driving waveform to the other so as to operate the pressure generating unit by a differential waveform between the two driving electrodes. 1. An ink-jet recording apparatus comprising:a recording head that includes a plurality of nozzles for discharging ink droplets, a pressure chamber communicating with each of the nozzles, and a pressure generating unit having a piezoelectric material sandwiched between two driving electrodes and operated by application of the driving waveform to each of the driving electrodes on the basis of discharge data so as to change the capacity of the pressure chamber and to discharge ink in the pressure chamber from the nozzle; anda driving circuit that generates the driving waveform,wherein{'b': 1', '2', '1', '2, 'the driving waveform has a first driving waveform composed of non-GND waveform, a second driving waveform composed of a non-GND waveform different from the first driving waveform, and a third driving waveform composed of a GND waveform, and a driving voltage V of the first driving waveform and a driving voltage V of the second driving waveform is |V|>|V|; and'}the driving circuit selects at least the first driving waveform and the second driving waveform or only the first driving waveform at every predetermined time in 1 ...

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Номер записи: 58

26-09-2013 дата публикации

INKJET PRINTER

Номер: US20130249986A1

Автор: Ebisawa Takashi, MAESAKA Toshihide, Saitou Mamoru, Terakado Ryo

Принадлежит: RISO KAGAKU CORPORATION

An inkjet printer includes nozzle rows aligned along a printing direction along which printing on a print medium is executed, and a controller configured to control ejection of the ink droplets from the nozzle rows. The nozzle rows include a pair of an upstream nozzle row and a downstream nozzle row. The upstream nozzle row is positioned just upstream from the downstream nozzle row along the printing direction. The controller controls ejection of the ink droplets from the upstream nozzle row and the downstream nozzle row so that propulsive forces applied to ink droplets ejected from the downstream nozzle row are made larger, based on image data associated with the upstream nozzle row, than propulsive forces applied to ink droplets ejected from the upstream nozzle row. The inkjet printer can restrict degradation of print quality by landing the ink droplets ejected from the downstream nozzle at their target positions. 1. An inkjet printer comprising:a plurality of nozzle rows aligned along a printing direction along which printing on a print medium is executed; anda controller configured to control ejection of ink droplets from the plurality of nozzle rows, whereinthe controller executes printing on a print medium by ejecting ink droplets from the plurality of nozzle rows onto the print medium while moving the plurality of nozzle rows relatively to the print medium based on image data,the plurality of nozzle rows includes a pair of an upstream nozzle row and a downstream nozzle row, the upstream nozzle row being positioned just upstream from the downstream nozzle row along the printing direction, andthe controller controls ejection of the ink droplets from the upstream nozzle row and the downstream nozzle row so that propulsive forces applied to ink droplets ejected from the downstream nozzle row are made larger, based on image data associated with the upstream nozzle row, than propulsive forces applied to ink droplets ejected from the upstream nozzle row.2. The ...

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Номер записи: 59

26-09-2013 дата публикации

Ring Electrode for Fluid Ejection

Номер: US20130249987A1

Автор: Hoisington Paul A., MENZEL Christoph, Ottosson Mats G.

Принадлежит:

Methods, systems, and apparatus for drive a pumping chamber of a fluid ejection system are disclosed. In one implementation, the actuator for drive the pumping chamber includes a continuous piezoelectric layer between a pair of drive electrodes and a continuous reference electrode. The pair of drive electrodes includes an inner electrode and an outer electrode surrounding the inner electrode. The actuator is further coupled to a controller which, during a fluid ejection cycle, applies a negative voltage pulse differential to the outer electrode to expand the pumping chamber for a first time period, then applies another negative voltage pulse differential to the inner electrode during a second time period after the first time period to contract the pumping chamber to eject a fluid drop. 1. A fluid ejection system , comprising:a substrate having a chamber formed therein;a membrane that forms a wall of the chamber and is operable to expand or contract the chamber by flexing; and the piezoelectric layer comprises a continuous planar piezoelectric material spanning the chamber and having a uniform poling direction substantially perpendicular to the continuous planar piezoelectric material;', 'the drive electrode layer comprises a plurality of drive electrodes, the plurality of drive electrodes including an inner electrode and an outer electrode surrounding the inner electrode; and', 'the reference electrode layer comprises a reference electrode, the reference electrode having a first portion spanning the inner electrode and a second portion spanning the outer electrode, where creation of a voltage differential between at least one of the plurality of drive electrodes and the reference electrode generates an electric field in the continuous planar piezoelectric material, and the electric field results in actuation of the continuous planar piezoelectric material to flex the membrane., 'a piezoelectric layer disposed between a drive electrode layer and a reference electrode ...

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Номер записи: 60

03-10-2013 дата публикации

Inkjet printing apparatus and inkjet printing method

Номер: US20130257944A1

Автор: Jun Yasutani

Принадлежит: Canon Inc

By performing an average process of a result of a plurality of times of samplings by the temperature sensor provided on a printing element substrate, temperature of the printing element substrate is obtained. In this case, the number of times of samplings is determined on the basis of a simultaneously driven number in the printing element substrate. This enables the number of times of samplings for the temperature sensor to be determined depending on a simultaneously driven number at each time, and therefore while suppressing an influence of noise, the temperature of the printing element substrate can be measured in a highly reliable state where there is no separation from an actual temperature.

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Номер записи: 61

10-10-2013 дата публикации

System and Method for Clearing Weak and Missing Inkjets in an Inkjet Printer

Номер: US20130265352A1

Автор: Brent R. Jones, Edward F. Burress

Принадлежит: Xerox Corp

An inkjet printer is operated to print an ink image and clear inkjets simultaneously. The inkjet printer delivers to a first inkjet in a printhead a first signal that ejects an ink drop from the first inkjet that corresponds to a pixel of an ink image stored in a memory of the printer and delivers to at least one other inkjet in the printhead a second signal that ejects an ink drop from the at least one other inkjet that does not correspond to a pixel of the ink image stored in the memory of the printer.

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Номер записи: 62

10-10-2013 дата публикации

DRIVE DEVICE, LIQUID JET HEAD, LIQUID JET RECORDING APPARATUS, AND DRIVE METHOD

Номер: US20130265354A1

Автор: Watanabe Toshiaki

Принадлежит: SII PRINTEK INC.

A device includes a drive portion for driving a pressure generating element, and controlling a state of driving the element. The drive portion includes: a first drive section for causing a first current to flow to drive the element; and a second drive section for causing a second current smaller than the first current to flow to drive the element. The state of driving the element includes a first state and a second state. The second drive section causes the second current in a direction in which the element is switched from the first state to the second state to flow at a timing that is faster by a predetermined time determined in advance with respect to a timing at which the first drive section causes the first current for switching the state of driving the element from the first state to the second state to flow. 1. A drive device for driving a liquid jet head , comprising:a nozzle provided with a nozzle opening;a pressure generating chamber communicated to the nozzle opening;a pressure generating element for generating pressure fluctuations inside the pressure generating chamber in response to input of a drive waveform to eject an ink droplet from the nozzle opening; anda drive portion for driving, as a load, the pressure generating element provided correspondingly to the nozzle, and controlling a state of driving the load, the drive portion comprising:a first drive section for causing a first current to flow to drive the load; anda second drive section for causing a second current smaller than the first current to flow to drive the load,wherein the state of driving the load comprises a first state and a second state, andwherein the second drive section causes the second current to flow in a direction in which the load is switched from the first state to the second state from a timing that is faster by a predetermined time determined in advance with respect to a timing at which the first drive section causes the first current to flow for switching the state of ...

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Номер записи: 63

10-10-2013 дата публикации

Printing apparatus and printing method

Номер: US20130265355A1

Автор: Hironori Sato, Hiroshi Mukai, Masako Fukuda, Nagatoshi Kasahara, Tomohiro Sayama, Toshihiro SHINBARA

Принадлежит: Seiko Epson Corp

A printing apparatus includes a head having a nozzle ejecting an ink having thermoplastic resin particles and a viscosity of 2.1 mPa·s or more at 50° C., a pressure chamber, and a drive element; a medium having ink-unabsorbable characteristics and a length of 64 inches or less in a predetermined direction; a movement mechanism which moves the head in the predetermined direction; a heating unit which heats the medium; and a control unit which causes the movement mechanism to move the head in the predetermined direction and applies a drive waveform generating a pressure change in the ink inside the pressure chamber, to the drive element. The control unit applies a micro-vibration waveform having a size which does not allow the ink to be ejected from the nozzle onto the drive element corresponding to the nozzle if the nozzle does not eject the ink.

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Номер записи: 64

17-10-2013 дата публикации

INKJET RECORDING DEVICE AND METHOD FOR GENERATING DRIVE WAVEFORM SIGNAL

Номер: US20130271519A1

Автор: Kubo Naomi, Takafuji Yoshifumi, Takagi Eisuke

Принадлежит: KONICA MINOLTA, INC.

An inkjet recording device is configured to cause a head control substrate to generate a first drive waveform signal and a second drive waveform signal. The first drive waveform signal is for applying, after 2 AL from finishing time of an ejection pulse P1 having a voltage V1 and a pulse width AL, a cancel pulse C1 having a voltage V3 ( Подробнее

Номер записи: 65

07-11-2013 дата публикации

Liquid ejecting apparatus, inspection method, and program

Номер: US20130293610A1

Автор: Masahiko YOSHIDO, Osamu Shinkawa, Toshiyuki Suzuki

Принадлежит: Seiko Epson Corp

A liquid ejecting apparatus includes a head having a first ejecting unit including a first liquid ejecting nozzle, a first pressure chamber communicating with the nozzle, and a first drive element, and a second ejecting unit including a second liquid ejecting nozzle, a second pressure chamber communicating with the nozzle, and a second drive element. The first nozzle ejects liquid by applying a drive signal to the first drive element, and the second nozzle ejects liquid by applying the drive signal to the second drive element. The first nozzle state is determined using a first detection signal obtained by applying a first drive signal to the first drive element and a second drive signal to the second drive element, and a second detection signal obtained by applying the first drive signal to the first drive element and a third drive signal to the second drive element.

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Номер записи: 66

21-11-2013 дата публикации

INK JET PRINTER AND METHOD FOR DEPOSITING A PROTECTIVE LAYER ON A SUBSTRATE

Номер: US20130307890A1

Автор: Abergel Edmond

Принадлежит: M.G.I. USA, Inc.

A protective layer is applied to a substrate moving relative to an ink jet nozzle array. Each nozzle responds to a piezoelectric actuator. Shapes of ink droplets deposited by the nozzles on the substrate, to form the protective layer, are controlled by shapes of electric waveforms applied to the actuators. Shapes of the waveforms respond to at least one of: droplet viscosity and temperature, temperature of the substrate, desired thickness of the layer, type of substrate surface to which the droplets are applied, and relative to speed of the substrate and the ink jet nozzle array. 1. A method of applying a coating of covering ink to a substrate moving relative to an ink jet nozzle arrangement having a piezoelectric actuator for applying droplets of covering ink to the substrate , the method comprising controlling by a computer the shapes of the droplets by controlling the shape of an electric waveform applied to the piezoelectric actuator , said shape being controlled by selecting at least a number of plateaus of the electric waveform , in response to at least one of the following parameters: viscosity of the ink , composition of the covering ink , temperature of the covering ink , temperature of the substrate , desired thickness of the layer , type of substrate surface to which the droplets are applied , and relative speed of the substrate and the ink jet nozzle arrangement.2. The method of wherein the shape of said electric waveform is controlled in response to the viscosity and/or the temperature of the ink claim 1 , detected as the ink flows from the ink container to the nozzle by at least one detector upstream from a heater included in the nozzle arrangement.3. The method of wherein the substrate surface type parameter includes chemical composition of the substrate and/or stiffness of the substrate.4. The method of wherein the waveform has (a) neutral value associated with the nozzle arrangement being at rest claim 1 , (b) a first polarity relative to the ...

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Номер записи: 67

21-11-2013 дата публикации

BINARY CONTINUOUS INKJET PRINTER WITH A DECREASED PRINTHEAD CLEANING FREQUENCY

Номер: US20130307891A1

Автор: Barbet Bruno, Bonnelon Damien

Принадлежит: Markem-Imaje

The invention relates to a new control method for controlling the printing of a binary continuous inkjet printer provided with a printhead () with a set of deflection electrodes () shared by all of the nozzles of the head, at least one pair of electrodes () supplied in phase opposition relative to each other, and actuators () to which pulses are sent to form a distance Lbr from the plane of the nozzles (), from the break of a jet discharged by a nozzle () in communication with a stimulation chamber () to which said actuator is mechanically coupled, drops not able to be electrically charged or jet segment subjected to the electrostatic influence of the deflection electrodes. 18-. (canceled)9. A control method for controlling printing by a binary continuous inkjet printer provided with a printhead , or a printhead of such a printer in order to print a pattern on a printing medium in motion relative to the head , the method comprising:determining information on a relative position of the printing medium in relation to the head;supplying each of a pair of electrodes with alternating voltage in phase opposition relative to each other;sending pulses to actuators to form, from a break of a jet discharged by a nozzle in communication with a stimulation chamber to which one said actuator is mechanically coupled at a distance from a plane of the nozzles, drops not able to be electrically charged by deflection electrodes or jet segments subject to electrostatic influence of the deflection electrodes; andcontrolling said pulses so as to minimize a total electric charge on the jet segments, said total electric charge being contained inside an electrostatic influence volume of the deflection electrodes, a multi-nozzle drop generator which includes a body, said body including one or more said stimulation chambers each able to receive pressurized ink, and discharge nozzles each provided in communication with one of said stimulation chambers and each able to discharge a jet of ink ...

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Номер записи: 68

21-11-2013 дата публикации

APPARATUS FOR PRINTING ON 3-DIMENSIONAL SURFACE USING ELECTROHYDRODYNAMIC FORCE

Номер: US20130307892A1

Автор: BYUN Do-Young, NGUYEN Vu Dat

Принадлежит: ENJET CO., LTD.

Provided herein is an apparatus for printing on a 3-dimensional surface using electrohydrodynamic force, the apparatus having a stage where a print object is placed; a shape obtainer storing surface information of the print object; a nozzle receiving ink and discharging the received ink to a surface side of the print object; a power supply supplying power to the nozzle; and a controller receiving the surface information of the print object from the shape obtainer and controlling a movement of the nozzle or the stage. 1. An apparatus for printing on a 3-dimensional surface using electrohydrodynamic force , the apparatus comprising:a stage where a print object is placed;a shape obtainer storing surface information of the print object;a nozzle receiving ink and discharging the received ink to a surface side of the print object;a power supply supplying power to the nozzle; anda controller receiving the surface information of the print object from the shape obtainer and controlling a movement of the nozzle or the stage.2. The apparatus according to claim 1 ,wherein the controller comprises a path obtainer comparing a printing path with the surface information of the print object provided from the shape obtainer, and generating convey information of the nozzle or the stage; anda convey control module using the convey information provided from the path obtainer to control the movement of the nozzle or the stage.3. The apparatus according to claim 2 ,wherein the path obtainer comprises an input module where the printing path is input; andan align module comparing the printing path provided from the input module with the surface information of the print object provided from the shape obtainer, and aligning the printing path.4. The apparatus according to claim 3 ,wherein the align module generates jet information of ink liquid droplet being jet from the nozzle, andthe controller further comprises a jet module using the jet information provided from the align module to control ...

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Номер записи: 69

05-12-2013 дата публикации

Compensating for capacitance changes in piezoelectric printhead elements

Номер: US20130321507A1

Автор: Jack Lavier, Peter Mardilovich

Принадлежит: Hewlett Packard Development Co LP

In an embodiment, a method of compensating for capacitance change in a piezoelectric element of a fluid ejection device includes sensing a current driving a piezoelectric element, determining from the current that capacitance of the piezoelectric element has changed, and altering a rise time of the current driving the piezoelectric element to compensate for the changed capacitance.

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Номер записи: 70

12-12-2013 дата публикации

Printing apparatus and printing method

Номер: US20130328954A1

Автор: Hironori Sato, Hiroshi Mukai, Masako Fukuda, Nagatoshi Kasahara, Tomohiro Sayama, Toshihiro SHINBARA

Принадлежит: Seiko Epson Corp

A printing apparatus includes a head having a nozzle through which ink that contains thermoplastic resin particles and whose viscosity at 50° C. is equal to or greater than 2.1 mPa·s is discharged, a pressure chamber, and a driving element; an ink non-absorptive medium; a heating unit; and a control unit that applies driving signals to the driving element. In the printing apparatus, a discharge waveform generated by the driving signal includes a first expansion-element that expands the pressure chamber, a contraction-element that contracts the pressure chamber having been expanded by the first expansion-element, a second expansion-element that expands the pressure chamber having been contracted by the contraction-element, a third expansion-element that further expands the pressure chamber having been expanded by the second-expansion element, and a connection-element that connects an end terminal of the second expansion-element with a start terminal of the third expansion-element at the same potential.

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Номер записи: 71

16-01-2014 дата публикации

Printing apparatus and printing method

Номер: US20140015888A1

Автор: Hiromitsu Yamaguchi, Makoto Akahira, Satoshi Wada

Принадлежит: Canon Inc

The present invention forms a high-quality image by using a print head, in which a plurality of arrayed small heads, each having a plurality of print elements arranged in columns, are arranged so that at least two sets of print elements in adjoining small heads are aligned in a scan direction. The print head and a print medium are moved relative to each other in the scan direction crossing a direction of the print element columns. The print elements are divided into a plurality of drive blocks and activated the drive blocks on a time-division basis. The small heads each have the plurality of print elements arranged in columns, the number of print elements being equal to an integer times the number of time-division drive blocks. Drive timings with which to activate the paired print elements aligned in the scan direction are the same time-division drive timing.

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Номер записи: 72

16-01-2014 дата публикации

INKJET RECORDING APPARATUS

Номер: US20140015902A1

Автор: Hayashi Ryuichi

Принадлежит: RICOH COMPANY, LIMITED

An inkjet recording apparatus comprises an inkjet recording head configured to eject an ink droplet from a nozzle by utilizing micro vibrations of a piezoelectric element; and a recording-head driving circuit configured to apply a drive voltage to the piezoelectric element. And, in the apparatus, the recording-head driving circuit includes a D/A converter configured to generate an analog voltage from and corresponding to digital data input to the D/A converter, and a reference-voltage generating circuit configured to generate a reference voltage of the D/A converter, and the reference-voltage generating circuit is configured to be capable of controlling a manner in which the reference voltage falls when an anomaly occurs to the inkjet recording apparatus. 1. An inkjet recording apparatus comprising:an inkjet recording head configured to eject an ink droplet from a nozzle by utilizing micro vibrations of a piezoelectric element; anda recording-head driving circuit configured to apply a drive voltage to the piezoelectric element, wherein a D/A converter configured to generate an analog voltage from and corresponding to digital data input to the D/A converter, and', 'a reference-voltage generating circuit configured to generate a reference voltage of the D/A converter, and, 'the recording-head driving circuit includes'}the reference-voltage generating circuit is configured to be capable of controlling a manner in which the reference voltage falls when an anomaly occurs to the inkjet recording apparatus.2. The inkjet recording apparatus according to claim 1 , whereinthe reference-voltage generating circuit includes a switching device, a capacitor, and a resistor, andthe reference-voltage generating circuit is configured to control fall time τ of the reference voltage of the D/A converter and fall time of a drive voltage of the recording-head driving circuit by setting a value of a capacitance C of the capacitor and a value of a resistance R of the resistor.3. The inkjet ...

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Номер записи: 73

23-01-2014 дата публикации

INK JET RECORDING DEVICE AND METHOD OF DRIVING INK JET RECORDING HEAD

Номер: US20140022294A1

Автор: Iwata Shuusuke, SATOU Takashi

Принадлежит:

An ink jet recording device includes an ink jet recording head including a pressure chamber communicating with an ink ejection orifice, and a piezoelectric actuator pressurizing ink in the pressure chamber. A drive signal generating unit generates a drive waveform having multiple drive pulses. A pulse supplying unit selects one or more of the drive pulses from the drive waveform depending on a size of an ink drop to be ejected and supplies the selected drive pulses to the piezoelectric actuator. The drive pulses in the drive waveform include ejection pulses to eject the ink drop from the orifice and a non-ejection pulse to suppress residual oscillations of the ink. The pulse supplying unit is configured to select one or more of the ejection pulses and the non-ejection pulse when an ink drop having a maximum size is to be ejected. 1. An ink jet recording device comprising:an ink jet recording head including a pressure chamber that communicates with an ink ejection orifice, and a piezoelectric actuator that changes a pressure of ink in the pressure chamber;a drive signal generating unit that generates a drive waveform having multiple drive pulses; anda pulse supplying unit that selects one or more of the drive pulses from the drive waveform depending on a size of an ink drop to be ejected from the ink ejection orifice and supplies the selected drive pulses to the piezoelectric actuator,wherein the multiple drive pulses in the drive waveform comprise a plurality of ejection pulses to eject the ink drop from the ink ejection orifice and a non-ejection pulse to suppress residual oscillations of the ink following the ejection pulses, andthe pulse supplying unit is configured to select one or more of the plurality of ejection pulses and the non-ejection pulse from the drive waveform when an ink drop having a maximum size is to be ejected from the ink ejection orifice.2. The ink jet recording device according to claim 1 , wherein the pulse supplying unit is configured to ...

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Номер записи: 74

06-02-2014 дата публикации

METHOD OF DRIVING LIQUID EJECTION HEAD AND LIQUID EJECTION APPARATUS

Номер: US20140035978A1

Автор: Kashu Ryota, Kitakami Koichi, Sasagawa Naoto

Принадлежит: CANON KABUSHIKI KAISHA

A method of driving a liquid ejection head includes preparing a liquid ejection head including first and second flow paths, and a piezoelectric element, a first step of applying a first voltage, which expands the second flow path, to the piezoelectric element while a meniscus of a liquid recessed from an orifice toward the second flow path is formed in a first flow path to move the meniscus to the second flow path, a second step of applying a second voltage, which contracts the second flow path, to the piezoelectric element while the meniscus that moves toward the first flow path is positioned in the second flow path to move the liquid to the first flow path, and a third step of applying a third voltage, which expands the second flow path, to the piezoelectric element to eject the liquid from the orifice after the liquid projects from the orifice. 1. A method of driving a liquid ejection head comprising:preparing a liquid ejection head that includes a first flow path having a first end serving as an orifice, a second flow path connected to a second end of the first flow path and having a larger cross-sectional area than that of the first flow path, and a piezoelectric element provided so as to correspond to the second flow path, the liquid ejection head repeating cycles in each of which the liquid ejection head is capable of ejecting a droplet from the orifice by applying a voltage having a predetermined waveform to the piezoelectric element, the cycles including a primary cycle in which a droplet is ejected from the orifice and a secondary cycle in which a droplet is not ejected from the orifice;the first step of applying, in the primary cycle, a first voltage, which increases the capacity of the second flow path, to the piezoelectric element so that a concave meniscus of a liquid that is recessed from the orifice toward an inside of the second flow path is formed in the second flow path;the second step of applying, in the primary cycle, a second voltage, which ...

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Номер записи: 75

06-02-2014 дата публикации

Automated high performance waveform design by evolutionary algorithm

Номер: US20140035992A1

Автор: Christopher Paulson, Steven E. Ready

Принадлежит: Palo Alto Research Center Inc

A method can include receiving an initial waveform and generating, testing, and evaluating the performance of an initial child set of waveforms based on an initial parent set of waveforms from the initial waveform. The method can also include determining whether a termination condition has been met based on the evaluating and, if so, providing an optimized waveform. If the termination condition has not been met, the method can also include generating subsequent child sets of waveforms based on the previous child set(s).

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Номер записи: 76

27-02-2014 дата публикации

Liquid Ejection Apparatus And Control Method For Liquid Ejection Apparatus

Номер: US20140055513A1

Автор: Toshiki Usui

Принадлежит: Seiko Epson Corp

A printer controller outputs plural drive signals including respective series of drive pulses, the timing points of which are different from one another, to a head control unit side, and outputs a multiplexed signal resulting from multiplexing change signals corresponding to the respective drive signals to a head control unit side, and the head control unit includes a control signal demultiplexing unit which demultiplexes the multiplexed signal into the change signals corresponding to respective nozzle rows, and an actuator control unit which, on the basis of each of the demultiplexed change signals, selects one of the drive pulses included in one of the drive signal which corresponds to the demultiplexed change signal, and applies the selected drive pulse to a piezoelectric element included in one of the nozzle rows which corresponds to the drive signal corresponding to the demultiplexed change signal.

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Номер записи: 77

06-03-2014 дата публикации

INK JET HEAD

Номер: US20140063095A1

Автор: Arai Ryuichi, Kusunoki Ryutaro, Tanuma Chiaki, YOKOYAMA Shuhei

Принадлежит: TOSHIBA TEC KABUSHIKI KAISHA

An ink jet head according to an embodiment comprises a substrate including a mounting surface and a pressure chamber, a vibration plate including a first surface fixed to the mounting surface and covering the pressure chamber, and a second surface opposite the first surface. The ink jet head further comprises a first electrode on the second surface, a piezoelectric body overlapping the first electrode, a second electrode overlapping the piezoelectric body, and a protective film provided on the second surface. The inkjet head further comprises a nozzle in communication with the pressure chamber and configured to discharge ink, and a drive circuit provided on the mounting surface of the substrate and configured to apply a drive voltage to the first electrode or the second electrode to deform the piezoelectric body and to change a volume of the pressure chamber. 1. An ink jet head comprising:a substrate including amounting surface and a pressure chamber open to the mounting surface;a vibration plate including a first surface fixed to the mounting surface of the substrate and covering the pressure chamber, and a second surface opposite the first surface;a first electrode formed on the second surface of the vibration plate;a piezoelectric body overlapping the first electrode;a second electrode overlapping the piezoelectric body;a protective film provided on the second surface of the vibration plate and covering the first electrode, the piezoelectric body and the second electrode;a nozzle in communication with the pressure chamber, formed on at least one of the vibration plate and the protective film, and configured to discharge ink, anda drive circuit provided on the mounting surface of the substrate and configured to apply a drive voltage to the first electrode or the second electrode to deform the piezoelectric body and to change a volume of the pressure chamber.2. The ink jet head of claim 1 ,wherein the drive circuit includes a plurality of semiconductor devices ...

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Номер записи: 78

06-03-2014 дата публикации

INKJET RECORDING APPARATUS

Номер: US20140063104A1

Автор: Furukawa Noriaki, HIROSHIMA Susumu, SOMETE Takashi, Takaori Yasuko

Принадлежит: KYOCERA Document Solutions Inc.

An inkjet recording apparatus according to one aspect of the present disclosure includes nozzle, pressuring chambers, piezoelectric element, ambient condition obtaining portion, application portion, and control portion. Control portion causes application portion to output ejection driving-voltage by which piezoelectric element is deformed so as to eject droplets from nozzles in printing period in printing state, and causes application portion to output vibration driving-voltage by which piezoelectric element is vibrated so as to vibrate meniscus in each nozzle in non-printing period between printing periods in printing state. Control portion changes the number of times piezoelectric element is vibrated in non-printing period, based on ambient condition obtained by ambient condition obtaining portion, or zero shear viscosity of ink which is calculated or obtained according to obtained ambient condition, and causes application portion to output vibration driving-voltage by which piezoelectric element is vibrated the number of times having been changed. 1. An inkjet recording apparatus comprising:a plurality of nozzles each of which can eject ink droplets toward a recording medium, and configured to have a meniscus of ink formed therein;pressurizing chambers that communicate with the plurality of nozzles, respectively, and into which ink is charged;a piezoelectric element that is deformed by a driving voltage being applied, and operates to eject the ink having been charged into the pressurizing chambers, as ink droplets, from the nozzles;an ambient condition obtaining portion that can obtain an ambient condition;an application portion that applies the driving voltage to the piezoelectric element; anda control portion that causes the application portion to output an ejection driving voltage by which the piezoelectric element is deformed so as to eject droplets from the nozzles in a printing period in a printing state, and that causes the application portion to output a ...

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Номер записи: 79

06-03-2014 дата публикации

Liquid discharge head

Номер: US20140063128A1

Автор: Kengo Umeda, Nobuyuki Hirayama, Ryo Kasai

Принадлежит: Canon Inc

A liquid discharge head includes a first unit configured to supply power, and a second unit including an input unit to which the power is input, a plurality of heaters connected to the input unit via a common power source line and configured to discharge liquid, an energization unit configured to energize the plurality of heaters, and a selection unit configured to select a target heater from the heaters for discharging liquid to be energized in turn by the energization unit for a period corresponding to a time interval at which liquid is discharged, wherein the selection unit further selects non-target heaters from the heaters to be energized different from the heater targeted for use for discharging liquid before and after the target heater is energized.

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Номер записи: 80

13-03-2014 дата публикации

Liquid ejection apparatus, controlling method thereof, and computer-readable medium for liquid ejection

Номер: US20140071192A1

Автор: Shunji UCHINO

Принадлежит: Brother Industries Ltd

A liquid ejection apparatus comprises a plurality of piezoelectric element units, which can be driven to eject liquid by changing a drive voltage, and a control device. The control device may calculate an accumulated time for each of the piezoelectric element units. The accumulated times may be a time that a respective piezoelectric element unit is in a driven state. The control device may also identify a first piezoelectric element unit having a maximum accumulated time and a second piezoelectric element unit having a minimum accumulated time from among the piezoelectric element units. The control device may reduce the drive voltage applied to one or more of the piezoelectric element units that are not in the driven state to a lower voltage, when the control device determines that the difference between the maximum accumulated time and the minimum accumulated time is less than a predetermined time.

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Номер записи: 81

20-03-2014 дата публикации

Method for controlling the temperature of a jetting device

Номер: US20140076988A1

Автор: Henricus C. M. Van Genuchten, Marcel Slot, Mircea V. Rasa, Wilhelmus P.J. CLASSENS

Принадлежит: Oce Technologies BV

A method for controlling a temperature of a jetting device, the jetting device being configured to jet droplets of a fluid at a high temperature, the fluid comprising an electrically conductive fluid, wherein at least a part of the fluid is positioned in a magnetic field, includes heating the jetting device to an operating temperature, being defined as the temperature suitable for jetting droplets, using a heat jetting droplets by providing an electrical actuation current in the part of the fluid positioned in the magnetic field, thereby generating a force in the conductive fluid; determining upcoming jetting conditions, the upcoming jetting conditions being defined as the jetting conditions corresponding to droplets to be jetted at a time (t 1 ) which is later than the present time (t 0 ); determining settings for the heat based on the determined upcoming jetting conditions; controlling the heating of the jetting device using the heat in accordance with the determined settings.

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Номер записи: 82

27-03-2014 дата публикации

PRINTING APPARATUS AND PRINTING METHOD

Номер: US20140085365A1

Автор: FUKUDA Masako, KASAHARA Nagatoshi, MUKAI Hiroshi, SATO Hironori, SAYAMA Tomohiro, SHINBARA Toshihiro

Принадлежит: SEIKO EPSON CORPORATION

A printing apparatus, has a head having a plurality of nozzles for discharging an ink containing thermoplastic resin particles and having a viscosity at 50° C. of 2.1 mPa·s or more to a non-ink-absorbing medium and a drive element provided in each of the nozzles, a heating portion which heats the medium, and a control portion which drives the drive elements by applying a drive waveform to discharge ink droplets from the nozzles corresponding to the drive elements, in which a first ink droplet is discharged from the nozzle by the application of the drive waveform to the drive element, and the discharge speed of an ink droplet whose discharge speed is lower of a second ink droplet and a third ink droplet discharged accompanying the first ink droplet is 4.0 m/s or more. 1. A printing apparatus , comprising:a head having a plurality of nozzles for discharging an ink containing thermoplastic resin particles and having a viscosity at 50° C. of 2.1 mPa·s or more to a non-ink-absorbing medium and a drive element provided in each of the nozzles;a heating portion which heats the medium; anda control portion which drives the drive elements by applying a drive waveform to discharge ink droplets from the nozzles corresponding to the drive elements;a first ink droplet being discharged from the nozzle by the application of the drive waveform to the drive element, and a discharge speed of an ink droplet whose discharge speed is lower of a second ink droplet and a third ink droplet discharged accompanying the first ink droplet being 4.0 m/s or more.2. The printing apparatus according to claim 1 , wherein the discharge speed of the first ink droplet is 7.0 m/s or lower.3. The printing apparatus according to claim 1 , comprising:a wiper member which abuts on a nozzle opening surface of the head in which opening portions of the nozzles are provided, whereinthe control portion relatively displaces the nozzle opening surface and the wiper member in a state where the wiper member is made ...

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Номер записи: 83

03-04-2014 дата публикации

Multi-dimensional data registration integrated circuit for driving array-arrangement devices

Номер: US20140091836A1

Автор: Fan-Gang Tseng, Jian Chiun Liou

Принадлежит: National Tsing Hua University NTHU

The multi-dimensional data registration integrated circuit for driving array-arrangement devices, comprising: a plurality of the i-th hierarchy sets, each of the i-th hierarchy sets is divided into a plurality of the (i+1)-th hierarchy sets; a i-th hierarchy address selection circuit, comprising a signal generation unit and a multiplexing unit, wherein the former generates an enable signal, the latter is connected to the signal generating unit and shifts the input data based on the enable signal and a second timing signal to further generate n bits of address signals, the i-th hierarchy address selection circuit is used to scan the plurality of the i-th hierarchy sets and select at least one of the i-th hierarchy sets to function; and a data supply circuit to follow a scan sequence of a j-th hierarchy address selection circuit and write a plurality of data into the selected j-th hierarchy sets.

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Номер записи: 84

10-04-2014 дата публикации

Liquid ejecting apparatus and liquid ejecting method

Номер: US20140098147A1

Автор: Hironori Endo, Toru Matsuyama, Toshihisa Saruta

Принадлежит: Seiko Epson Corp

A liquid ejecting apparatus includes a reference drive signal generation section that generates a reference drive signal, a signal modulation section that modulates the reference drive signal to generate a modulation reference drive signal, a signal amplification section that amplifies the modulation reference drive signal using switching elements to generate a modulation drive signal, a signal conversion section that converts the modulation drive signal to a drive signal, and a head which includes a piezoelectric element that deforms in response to the drive signal, a pressure chamber that expands and contracts due to the deformation of the piezoelectric element and has a Helmholtz resonance frequency of a period Tc, and a nozzle opening portion that communicates with the pressure chamber. A period of an alternating current component contained in the modulation drive signal is a divisor of a section of one of the drive signal.

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Номер записи: 85

10-04-2014 дата публикации

Liquid ejecting apparatus and liquid ejecting method

Номер: US20140098148A1

Автор: Hironori Endo, Toru Matsuyama, Toshihisa Saruta

Принадлежит: Seiko Epson Corp

A liquid ejecting apparatus includes a reference drive signal generation section that generates a reference drive signal, a signal modulation section that modulates the reference drive signal to generate a modulation reference drive signal, a signal amplification section that amplifies the modulation reference drive signal using switching elements to generate a modulation drive signal, a signal conversion section that converts the modulation drive signal to a drive signal, a piezoelectric element that deforms in response to the drive signal, a pressure chamber that expands or contracts due to the deformation of the piezoelectric element, and a nozzle opening portion that communicates with the pressure chamber. A period of alternating current components contained in the modulation drive signal are shorter than a duration of a maximum voltage or a minimum voltage, and is longer than a total time of turn-on delay times and turn-off delay times of the switching elements.

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Номер записи: 86

10-04-2014 дата публикации

Fluid ejection device and fluid ejection printer with a power amplifier stopping section

Номер: US20140098150A1

Автор: Atsushi Oshima, Hiroyuki Yoshino, Kunio Tabata, Noritaka Ide, Shinichi Miyazaki

Принадлежит: Seiko Epson Corp

A fluid ejection device includes: a modulator adapted to pulse-modulate a drive waveform signal forming a basis of a drive signal of an actuator to obtain a modulated signal; a digital power amplifier circuit adapted to power-amplify the modulated signal to obtain a power-amplified modulated signal; a low pass filter adapted to smooth the power-amplified modulated signal to obtain the drive signal; and a power amplification stopping section operating when holding a voltage of the actuator constant.

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Номер записи: 87

07-01-2021 дата публикации

LIQUID DROP DISCHARGE APPARATUS

Номер: US20210001626A1

Автор: JANG Yoon Ok, KANG Han Lim, LEE Hyun Min, Lee Jun Seok

Принадлежит: SEMES CO., LTD.

A liquid drop discharge apparatus is proposed. The liquid drop discharge apparatus includes: an inkjet head discharging ink to each of pixels of a substrate; a laser emitter coupled to the inkjet head, and emitting an aiming laser beam by which a discharged position of a liquid drop from the inkjet head to each of the pixels is aimed; a camera capturing an emitted position of the aiming laser beam on the substrate; and a position alignment unit aligning a position of the inkjet head on the basis of image data obtained from the shooting unit. 1. A liquid drop discharge apparatus comprising:an inkjet head discharging ink to each of pixels of a substrate;a laser emitter coupled to the inkjet head and configured to emit an aiming laser beam to a target position on the substrate, wherein the target position corresponds to a discharged position of a liquid drop from the inkjet head to form a corresponding pixel of the pixels;a camera capturing an emitted position on the substrate where the aiming laser beam reaches; anda position alignment unit aligning a position of the inkjet head on the basis of image data obtained from the camera.2. The apparatus of claim 1 ,wherein the laser emitter comprises:a laser generating a laser beam; anda diffraction member located to be adjacent to the laser, and configured to diffract the laser beam in multiple directions to generate the aiming laser beam.3. The apparatus of claim 1 ,wherein the laser emitter is coupled to a front side of the inkjet head relative to a direction in which the inkjet head is moved from an initial position thereof.4. The apparatus of claim 1 ,wherein the position alignment unit comprises:an image processing part detecting the emitted position of the aiming laser beam from the image data;a distance calculator calculating a relative distance difference between the emitted position of the aiming laser beam and the target position; anda drive part changing the position and an angle of the inkjet head by the ...

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Номер записи: 88

07-01-2021 дата публикации

LIQUID EJECTING APPARATUS

Номер: US20210001627A1

Автор: FUKUDA Shunya, Uchida Kazuaki

Принадлежит:

the ejection amount per ejection from the nozzle when the distance between the nozzle and the recording medium is the first distance is equal to the ejection amount per ejection from the nozzle when the distance between the nozzle and the recording medium is the second distance. 1. A liquid ejecting apparatus comprising:a liquid ejecting head with a nozzle configured to eject a liquid; anda control section configured to control ejection of the liquid by the liquid ejecting head, whereinthe control section controls ejection of the liquid by the liquid ejecting head so that an ejection speed of the liquid from the nozzle is a first speed when a distance between the nozzle and a recording medium is a first distance,the ejection speed is a second speed higher than the first speed when the distance between the nozzle and the recording medium is a second distance greater than the first distance, andan ejection amount per ejection from the nozzle when the distance between the nozzle and the recording medium is the first distance is equal to an ejection amount per ejection from the nozzle when the distance between the nozzle and the recording medium is the second distance.2. The liquid ejecting apparatus according to claim 1 , whereinthe liquid ejecting head includes an energy generating element corresponding to the nozzle and configured to generate energy for ejecting the liquid,the control section ejects a liquid from the nozzle by applying a first pulse to the energy generating element when the distance between the nozzle and the recording medium is the first distance and by applying a second pulse to the energy generating element when the distance between the nozzle and the recording medium is the second distance, andthe first pulse and the second pulsedecrease voltage in a period from a first timing to a second timing,increase voltage in a period from a third timing to a fourth timing after the second timing, anddecrease voltage in a period after a fifth timing after ...

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Номер записи: 89

07-01-2021 дата публикации

JETTING HEAD DRIVE UNIT, JETTING HEAD UNIT, LIQUID JETTING APPARATUS, JETTING HEAD DRIVE METHOD, AND PROGRAM

Номер: US20210001628A1

Автор: NISHIKAWA Baku, Ozaki Yuichi

Принадлежит: FUJIFILM Corporation

A drive waveform acquisition unit that acquires a drive waveform; a drive voltage generation unit that generates a drive voltage; and a drive voltage supply unit that supplies the drive voltage are included. The drive waveform acquisition unit acquires an overflow waveform used to generate an overflow drive voltage. The drive voltage generation unit generates the overflow drive voltage including one or more overflow pulses corresponding to a period of 0.2 seconds or more and 90 seconds or less. The overflow pulses have a pulse width of 1.2 times or more and 1.8 times or less and an amplitude of 0.3 times or more and 0.8 times or less, and at least one of a rising period or a falling period of 0.3 times or less with respect to a jetting pulse. 1. A jetting head drive unit including a plurality of nozzles and a plurality of piezoelectric elements corresponding to the plurality of nozzles , the jetting head drive unit comprising:a drive waveform acquisition unit that acquires a drive waveform;a drive voltage generation unit that generates a drive voltage to be supplied to the piezoelectric elements using the drive waveform; anda drive voltage supply unit that supplies the drive voltage to the piezoelectric elements,wherein the drive waveform acquisition unit acquires an overflow waveform used to generate an overflow drive voltage when a liquid is caused to overflow from the nozzle to a nozzle surface without jetting the liquid from the nozzle,wherein the drive voltage generation unit uses the overflow waveform to generate the overflow drive voltage including one or more overflow pulses corresponding to a period of 0.2 seconds or more and 90 seconds or less, andwherein the overflow pulses have a pulse width of 1.2 times or more and 1.8 times or less, an amplitude of 0.3 times or more and 0.8 times or less, and at least one of a rising period or a falling period of 0.3 times or less, with respect to a jetting pulse included in a jetting drive voltage when the liquid is ...

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Номер записи: 90

07-01-2021 дата публикации

LIQUID DISCHARGE APPARATUS, DRIVE WAVEFORM GENERATING DEVICE, AND HEAD DRIVING METHOD

Номер: US20210001629A1

Автор: Yoshida Takahiro

Принадлежит: RICOH COMPANY, LTD.

A liquid discharge apparatus includes a liquid discharge head to discharge liquid and control circuitry to generate a drive waveform including drive pulses applied to the head. The drive waveform includes a non-discharge pulse not to discharge the liquid and a discharge pulse to discharge the liquid. The non-discharge pulse and the discharge pulse are serial in time in the drive waveform. Td is in a range of Tc−0.2×Tc to Tc+0.45×Tc. Vp is in a range of −10% to +10% of Vpp. Td represents a time interval between the non-discharge pulse and the discharge pulse. Tc represents a natural vibration period of a pressure chamber of the head. Vp represents a peak value of the non-discharge pulse. Vpp represents a peak value of the non-discharge pulse at which a droplet speed of liquid discharged by the discharge pulse takes a local minimum value. 1. A liquid discharge apparatus comprising:a liquid discharge head configured to discharge liquid; andcontrol circuitry configured to generate a drive waveform including a plurality of drive pulses applied to the liquid discharge head,the drive waveform including a non-discharge pulse not to discharge the liquid and a discharge pulse to discharge the liquid, the non-discharge pulse and the discharge pulse being serial in time in the drive waveform,Td being in a range of Tc−0.2×Tc to Tc+0.45×Tc, and{'b': 1', '1, 'Vp being in a range of −10% to +10% of Vpp,'}{'b': 1', '1, 'where Td represents a time interval between the non-discharge pulse and the discharge pulse, Tc represents a natural vibration period of a pressure chamber of the liquid discharge head, Vp represents a peak value of the non-discharge pulse, and Vpp represents a peak value of the non-discharge pulse at which a droplet speed of liquid discharged by the discharge pulse takes a local minimum value.'}2. The liquid discharge apparatus according to claim 1 ,wherein Td is in a range of Tc−0.1×Tc to Tc+0.25×Tc.3. The liquid discharge apparatus according to claim 1 ,wherein Td ...

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Номер записи: 91

07-01-2021 дата публикации

IMAGE FORMING APPARATUS AND METHOD, ABNORMAL NOZZLE DETECTION METHOD, AND PRINTED MATTER MANUFACTURING METHOD

Номер: US20210001638A1

Автор: Shibata Hiroyuki

Принадлежит: FUJIFILM Corporation

Provided is an image forming apparatus and a method, an abnormal nozzle detection method, and a printed matter manufacturing method that can suppress the consumption of an extra medium and can efficiently specify an abnormal nozzle. The image forming apparatus () includes a print head () that has a plurality of nozzles, an association unit () that associates the nozzle with a partial region in a user image, a first correction unit that performs a first correction assuming that the associated nozzle is abnormal in at least one of the partial regions, a streak detection unit () that detects streak information from a print result of the user image including the partial region subjected to the first correction, and a nozzle state estimation unit () that estimates a state of the nozzle on the basis of the streak information of two or more partial regions in a single user image. 1. An image forming apparatus comprising:a print head that has a plurality of nozzles for ejecting a liquid droplet;an association unit that associates the nozzle with a partial region in a user image designated as an image of a target whose image is formed by using the print head;a first correction unit that performs a first correction assuming that the associated nozzle is abnormal in at least one of the partial regions;a printing control unit that causes the print head to print the user image including the partial region subjected to the first correction;a streak detection unit that detects streak information from a print result of the user image including the partial region subjected to the first correction; anda nozzle state estimation unit that estimates a state of the nozzle on the basis of the streak information of two or more partial regions in a single user image printed by using the print head.2. The image forming apparatus according to claim 1 , further comprising:a second correction unit that performs a second correction that suppresses a visibility of streaks due to an abnormal ...

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Номер записи: 92

05-01-2017 дата публикации

IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD

Номер: US20170001432A1

Автор: Hori Shinjiro, Ikeda Tohru, Ishikawa Tomokazu, Kagawa Hidetsugu, Suwa Tetsuya, Tanaka Wakako, Yanai Yumi

Принадлежит:

An image processing apparatus has: a generating unit configured to generate inspection target image data on the basis of read image data; a setting unit configured to set inspection target areas from the inspection target image data; and an extracting unit configured to extract a unique portion by applying a predetermined process to the set inspection target areas. The setting unit sets the inspection target areas so as to make the ratio of inspection target areas to the entire image area of the inspection target image data in a predetermined direction larger than the ratio of inspection target areas to the entire image area in a direction intersecting with the predetermined direction. 1. An image processing apparatus adapted to detect a unique portion extending in a predetermined direction from a printed image , the image processing apparatus comprising:a generating unit configured to generate inspection target image data on a basis of read image data resulting from reading the image;a setting unit configured to set inspection target areas in the inspection target image data; andan extracting unit configured to perform an image processing for extracting the unique portion of the inspection target areas set by the setting unit, whereinthe setting unit sets the inspection target areas so as to make a ratio of a range occupied by inspection target areas to an entire image area of the inspection target image data in the predetermined direction larger than a ratio of a range occupied by inspection target areas to the entire image area in a direction intersecting with the predetermined direction.2. The image processing apparatus according to claim 1 , whereinthe setting unit sets the inspection target areas so as to make the ratio of a range occupied by the inspection target areas to the entire image area of the inspection target image data in the predetermined direction equal to 100%.3. The image processing apparatus according to claim 1 , whereinthe setting unit: ...

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Номер записи: 93

05-01-2017 дата публикации

EVALUATING PRINT NOZZLE CONDITION

Номер: US20170001433A1

Автор: ANDERSON Daryl E., Fricke Peter James, Gardner James Michael, Martin Eric T.

Принадлежит: Hewlett-Packard Development Company, L.P.

Systems and methods for evaluating the condition of a print nozzle are described. In one example, impedances across the print nozzle are measured. Subsequently, first test result and second test result are determined and registered at a first predetermined time instant and at a second predetermined time instant, respectively. The first test result and the second test result are obtained based on the measured impedances. Based on the first test result and the second test result, the condition of the print nozzle, is determined. 1. A method for evaluating the condition of a print nozzle , the method comprising:measuring impedances across the print nozzle;registering onto a print the circuitry of the print nozzle, at least at a first predetermined time instant and at a second predetermined time instant, a first test result and a second test result, respectively, obtained based on the measured impedances, wherein each of the first predetermined time instant and the second predetermined time instant are measured with respect to a firing pulse;evaluating the condition of the print nozzle based on the first test result and the second test result.2. The method as claimed in claim 1 , wherein the first test result is obtained by comparing a voltage corresponding to the impedance measured at the first predetermined time instant with a threshold voltage.3. The method as claimed in claim 2 , wherein the second test result is obtained by comparing a voltage corresponding to the impedance measured at the second predetermined time instant with the threshold voltage4. The method as claimed in claim 1 , wherein the first test result and the second test result are in the form of a logical output.5. The method as claimed in claim 1 , wherein:the first test result is indicative of whether a drive bubble persisted at the first predetermined time instant; andthe second test result is indicative of whether the drive bubble collapsed and ink within an ink chamber associated with the print ...

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Номер записи: 94

05-01-2017 дата публикации

LIQUID DISCHARGE APPARATUS AND METHOD OF CONTROLLING THE SAME

Номер: US20170001434A1

Автор: Makita Shushi, YAMASHITA Noriaki

Принадлежит:

A liquid discharge apparatus includes a filter configured to filter liquid to be discharged from a nozzle, a vibration detection mechanism configured to detect vibration of ink in an ink flow path generated by the driving of a piezoelectric element as an actuator; and a calculation circuit configured to obtain a detection value obtained by the vibration detection mechanism and perform calculation by using the detection value, wherein the vibration detection mechanism detects vibration of n (1 Подробнее

Номер записи: 95

05-01-2017 дата публикации

Liquid discharge device and head unit

Номер: US20170001435A1

Автор: Dai Nozawa

Принадлежит: Seiko Epson Corp

A liquid discharge device includes a modulation circuit that generates a modulation signal obtained by pulse-modulating a source signal by self oscillation, a transistor pair which includes a high side transistor and a low side transistor and which generates an amplified modulation signal by amplifying the modulation signal, a demodulator which includes an inductor and a capacitor and which generates a drive signal by smoothing the amplified modulation signal, an piezoelectric element that is displaced when the drive signal is applied, a cavity inside which a liquid droplet is filled and whose internal volume is changed by the displacement of the piezoelectric element, and a nozzle provided to discharge liquid inside the cavity according to the change of the internal volume of the cavity. A distance between the high side transistor and the capacitor is longer than a distance between the inductor and the capacitor.

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Номер записи: 96

05-01-2017 дата публикации

DROPLET DRIVING CONTROL DEVICE AND IMAGE FORMING APPARATUS

Номер: US20170001437A1

Автор: SASAKI Hirotake, Seto Shinji

Принадлежит:

A droplet driving control device includes: an output unit which outputs, at droplet ejection timing, a driving waveform for ejecting each droplet at a requested droplet ejection period, the waveform being a reference driving waveform including a plurality of pulse signals which can be set ON or OFF individually; a determination unit which determines whether the droplet ejection period has to be changed or not; an adjustment unit which sets each of the pulse signals of the reference driving waveform ON or OFF selectively based on a determination result of the determination unit to adjust the reference driving waveform to an adjusted driving waveform; and a droplet ejection control unit which ejects each droplet by use of the adjusted driving waveform adjusted by the adjustment unit. 1. A droplet driving control device comprising:an output unit which outputs, at droplet ejection timing, a driving waveform for ejecting each droplet at a requested droplet ejection period, the waveform being a reference driving waveform comprising a plurality of pulse signals which can be set ON or OFF individually;a determination unit which determines whether the droplet ejection period has to be changed or not;an adjustment unit which sets each of the pulse signals of the reference driving waveform ON or OFF selectively based on a determination result of the determination unit to adjust the reference driving waveform to an adjusted driving waveform; anda droplet ejection control unit which ejects each droplet by use of the adjusted driving waveform adjusted by the adjustment unit.2. The droplet driving control device according to claim 1 , wherein:the determination unit uses the magnitude of an error of droplet ejection speed as a determination criterion, the error of the droplet ejection speed being caused by a characteristic of residual vibration whose amplitude increases around a proper value of droplet speed as the droplet ejection period is shorter, and converges keeping a ...

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Номер записи: 97

05-01-2017 дата публикации

DROPLET DRIVING CONTROL DEVICE AND IMAGE FORMING APPARATUS

Номер: US20170001438A1

Автор: SASAKI Hirotake, Seto Shinji

Принадлежит:

A droplet driving control device includes: a droplet ejection control unit which ejects droplets at requested droplet ejection periods; and an adjustment unit which adjusts control of the droplet ejection control unit using at least continuous two of the droplet ejection periods as one set based on an error of droplet speed with respect to a proper value thereof, so that droplets can be ejected at different droplet ejection periods within a range of the one set, and an average value of the droplet ejection periods within the range of the one set for ejecting the droplets can be equal to each of the requested droplet ejection periods. 1. A droplet driving control device comprising:a droplet ejection control unit which ejects droplets at requested droplet ejection periods; andan adjustment unit which adjusts control of the droplet ejection control unit using at least continuous two of the droplet ejection periods as one set based on an error of droplet speed with respect to a proper value thereof, so that droplets can be ejected at different droplet ejection periods within a range of the one set, and an average value of the droplet ejection periods within the range of the one set for ejecting the droplets can be equal to each of the requested droplet ejection periods.2. The droplet driving control device according to claim 1 , wherein the adjustment unit increases/decreases droplet ejection timings in the range of the one set by values to thereby cancel the values with each other so that droplet speed of each droplet can approach a set value of the droplet speed in each of the periods within the range of the one set.3. The droplet driving control device according to claim 1 , wherein:the error in the droplet speed is caused by a characteristic of residual vibration whose amplitude increases around the proper value of the droplet speed as each of the droplet ejection periods is shorter, and converges keeping a specific frequency; andthe adjustment unit executes the ...

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Номер записи: 98

07-01-2016 дата публикации

PRINTING SYSTEM

Номер: US20160001548A1

Автор: Conesa Eduardo Amela, Fernandez Jaime, Humet Jacint, Serra Marc

Принадлежит:

A printing method and system include a printhead configured to eject a fixer fluid. A controller is operatively connected to the printhead and configured to control the printhead so as to apply the fixer fluid to a print area in a pattern to form cells having a predetermined area without the fixer fluid. 1. A printing method , comprising:applying, with a first printhead, a fixer fluid to a print area to form cells having a predetermined area without the fixer fluid; andapplying, with a second printhead, ink to the print areathe fixer fluid to contain ink within the predetermined area of a respective cell.2. The printing method of claim 1 , comprising:applying the fixer fluid as a pretreatment fluid before applying the ink.3. The printing method of claim 1 , comprising:applying the fixer fluid in a periodic grid.4. The printing method of claim 1 , comprising:applying the fixer fluid in a non-periodic grid.5. The printing method of claim 4 , wherein:the non-periodic grid is a Voronoi grid.6. The printing method of claim 1 , wherein:the cells have a diameter of about 0.5 mm.7. The printing method of claim 1 , wherein:applying ink to the print area includes applying color ink.814-. (canceled)15. A non-transitory machine readable storage medium storing instructions that when executed cause a processor to implement a method claim 1 , comprising:applying, with a first printhead, a fixer fluid to a print area to form cells having a predetermined area without the fixer fluid; andapplying, with a second printhead, ink to the print area,the fixer fluid containing ink within the predetermined area of a respective cell.16. The non-transitory machine readable storage medium of claim 15 , the method further comprising:applying the ink after applying the fixer fluid.17. The non-transitory machine readable storage medium of claim 15 , the method further comprising:applying the fixer fluid in a periodic grid.18. The non-transitory machine readable storage medium of claim 15 , the ...

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Номер записи: 99

07-01-2016 дата публикации

CONTROL APPARATUS AND CONTROL METHOD FOR CONTROLLING FORMING APPARATUS WHICH FORMS CONCAVO-CONVEX STRUCTURE

Номер: US20160001549A1

Автор: Kadoi Hideki, Kubo Hideki

Принадлежит:

A control apparatus configured to control a forming apparatus which forms concavo-convex structure by ejecting ink obtains concavo-convex data indicating the concavo-convex to be formed and divide the concavo-convex data into a plurality of pieces of data. The control apparatus controls a formation order, performed by the forming apparatus, of the concavo-convex portions each corresponding to the plurality of pieces of data divided by the dividing unit based on a feature amount of the concavo-convex indicated by the concavo-convex data. 1. A control apparatus configured to control a forming apparatus which forms concavo-convex structure by ejecting ink , comprising:an obtaining unit configured to obtain concavo-convex data indicating the concavo-convex structure to be formed;a dividing unit configured to divide the concavo-convex data into a plurality of pieces of data for a plurality of scanning; anda control unit configured to control the forming apparatus based on the plurality of pieces of data, whereinthe control unit controls a formation order, performed by the forming apparatus, of the concavo-convex portions each corresponding to the plurality of pieces of data divided by the dividing unit based on a feature amount of the concavo-convex indicated by the concavo-convex data.2. The control apparatus according to claim 1 , wherein the control unit uses a degree of sharpness of the concavo-convex data as the feature amount.3. The control apparatus according to claim 1 , whereinthe dividing unit generates pieces of slice data corresponding respectively to a plurality of layers by dividing the concavo-convex data indicating the concavo-convex to be formed, andthe control unit controls the forming apparatus in such a way that: a piece of the slice data for an uppermost layer in a region of a sharp portion of the concavo-convex is recorded in a last scanning operation for the region; and other pieces of the slice data in the region of the sharp portion are recorded ...

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Номер записи: 100