EP2610060B1 - Droplet injection apparatus and method for driving droplet injection apparatus - Google Patents

Droplet injection apparatus and method for driving droplet injection apparatus Download PDF

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Publication number
EP2610060B1
EP2610060B1 EP20120199189 EP12199189A EP2610060B1 EP 2610060 B1 EP2610060 B1 EP 2610060B1 EP 20120199189 EP20120199189 EP 20120199189 EP 12199189 A EP12199189 A EP 12199189A EP 2610060 B1 EP2610060 B1 EP 2610060B1
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EP
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Prior art keywords
pulse
channel
channels
ink
volume
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Not-in-force
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EP20120199189
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German (de)
English (en)
French (fr)
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EP2610060A1 (en
Inventor
Ryohei Kobayashi
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Konica Minolta IJ Technologies Inc
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Konica Minolta IJ Technologies Inc
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
    • B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
    • B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
    • B41J2/04588—Control methods or devices therefor, e.g. driver circuits, control circuits using a specific waveform
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
    • B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
    • B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
    • B41J2/04581—Control methods or devices therefor, e.g. driver circuits, control circuits controlling heads based on piezoelectric elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
    • B41J2202/01—Embodiments of or processes related to ink-jet heads
    • B41J2202/10—Finger type piezoelectric elements

Definitions

  • the present invention relates to droplet injection apparatuses and methods for driving the droplet injection apparatus and, in particular, to a droplet injection apparatus and a method for driving the droplet injection apparatus, the apparatus and the method that can inject low-viscosity ink with stability without being affected by the injection performed by an adjacent nozzle.
  • a droplet injection apparatus having a recording head that injects ink in a channel which is a pressure generating chamber as a minuscule ink droplet out of a nozzle is widely used as an ink-jet recording apparatus that records and forms a desired ink-jet image by making an ink droplet land on a recording medium such as recording paper.
  • ink-jet recording apparatus there has been a growing need for ink-jet ink for industrial use, and injection of inks having various properties is desired.
  • ink-based ink using water as a main solvent out of consideration for the environment.
  • the ink viscosity of the water-based ink is often low due to the properties of water.
  • this phenomenon occurs more noticeably when a recording head in use is a recording head of shear mode type that sequentially injects the ink in channels out of nozzles by using a partition wall shared by adjacent channels as an actuator and driving the partition walls, each corresponding to channels arranged with one another, by time division.
  • the recording head of shear mode type cannot inject ink droplets concurrently from the adjacent channels, when the ink in one channel is injected out of the nozzle, the ink in the channel adjacent to the one channel is not injected at the same time.
  • the pressure is generated also in the ink in the adjacent channel as a result of the partition wall of the channels being deformed and driven due to the injection of the ink droplet, and the meniscus in the nozzle adjacent to the injection channel is extruded.
  • the air is sucked into the nozzle when the meniscus is drawn into the nozzle again, making it impossible to continue stable injection.
  • the extrusion of the meniscus presents no problem because this extrusion is cancelled by the ink droplet injection operation.
  • this extrusion becomes a large problem when a channel adjacent to the channel that injects an ink droplet is a non-injection channel that does not inject an ink droplet.
  • the non-injection channel is affected by the drive pressure of the injection channels on both sides, making it most difficult to realize stable injection.
  • 3-cycle driving is one of drive methods for driving the recording head of shear mode type, the methods by which all the channels 31 are divided into three groups: group A, group B, and group C by treating channels 31 on every two lines as one group and the channels 31 are driven on a group-by-group basis by time division.
  • FIG. 9 depicts the time change in the amount of extrusion of meniscus of a specific non-injection channel (an odd-numbered channel) of the group A when even-numbered channels of the channels 31 are driven as injection channels that perform ink injection in the order of the group A, the group B, and the group C (A cycle ⁇ B cycle ⁇ C cycle).
  • the even-numbered channel is assumed to be an injection channel.
  • the odd-numbered channel itself of the channels of the group A is a non-injection channel
  • the channels on both sides thereof, the channels of the group B and the group C are even-numbered channels and injection channels
  • the odd-numbered channel of the channels of the group A is easily affected by these injection channels.
  • Japanese Unexamined Patent Application Publication No. 2001-310461 describes a droplet injection apparatus for injecting ink droplets that comprises a recording head including a plurality of nozzles injecting ink droplets, a plurality of channels, each communicating with a corresponding one of the nozzles, and the plurality of channels arranged with one another, and an actuator formed as a partition wall which is shared with the adjacent channels and formed of a piezoelectric material, and the actuator causing ink in the channel to be injected out of the nozzle by changing the volume of the channel by shear deformation of the partition wall through the application of a drive signal.
  • a drive signal generating unit generating the drive signal containing a plurality of drive pulses for driving the actuator.
  • the document also describes a technique of setting the voltage ratio of a first pulse to a second pulse at 1.2 or more but 5.0 or less to stabilize the meniscus at the time of high speed driving.
  • this technique is aimed at reducing meniscus vibration in a nozzle after ink is injected out of the nozzle and does not give consideration to the influence of the meniscus of an adjacent channel when driving is performed by using, in particular, low-viscosity ink having a viscosity of less than 5.0 ⁇ 10 -3 Pa ⁇ sec.
  • the present invention has been made in view of the circumstances described above, and an object thereof is to provide a droplet injection apparatus and a method for driving the droplet injection apparatus, the apparatus and the method that can inject an ink droplet from a recording head with stability by stabilizing the vibration of the meniscus of a nozzle that does not perform injection, the nozzle adjacent to a nozzle that performs injection, when an ink droplet is injected from a recording head of shear mode type by time division driving by using low-viscosity ink, the recording head of shear mode type that causes shear deformation of a partition wall shared by adjacent channels as an actuator.
  • a first aspect of the invention provides a droplet injection apparatus for injecting ink having a viscosity of less than 5.0 ⁇ 10 -3 Pa ⁇ sec and comprising: a recording head ,including a plurality of nozzles injecting ink droplets, a plurality of channels, each communicating with a corresponding one of the nozzles, and the plurality of channels arranged with one another, and an actuator formed as a partition wall which is shared with the adjacent channels and formed of a piezoelectric material, and the actuator causing ink in the channel to be injected out of the nozzle by changing the volume of the channel by shear deformation of the partition wall through the application of a drive signal; and a drive signal generating unit generating the drive signal containing a plurality of drive pulses for driving the actuator, the droplet injection apparatus controlling the driving of the recording head in such a way that an ink injection operation is sequentially performed by time division by dividing all the channels into two or more groups, each being formed of the channels away from one another with one or more channels placed there
  • the pulse width of the first pulse can be 0.7 AL or more but 1.3 AL or less, and the ratio of the pulse width PWon of the first pulse to the pulse width PWoff of the second pulse can be 0.45 ⁇
  • a second aspect of the invention provides a method for driving a droplet injection apparatus for injecting ink having a viscosity of less than 5.0 ⁇ 10 -3 Pa ⁇ sec, and including a recording head ,including a plurality of nozzles injecting ink droplets, a plurality of channels, each communicating with a corresponding one of the nozzles, and the plurality of channels arranged with one another, and an actuator formed as a partition wall which is shared with the adjacent channels and formed of a piezoelectric material, and the actuator causing ink in the channel to be injected out of the nozzle by changing the volume of the channel by shear deformation of the partition wall through the application of a drive signal, and a drive signal generating unit generating the drive signal containing a plurality of drive pulses for driving the actuator, the droplet injection apparatus controlling the driving of the recording head in such a way that an ink injection operation is sequentially performed by time division by dividing all the channels into two or more groups, each being formed of the channels away from one another with one or
  • the pulse width of the first pulse can be 0.7 AL or more but 1.3 AL or less, and the ratio of the pulse width PWon of the first pulse to the pulse width PWoff of the second pulse can be 0.45 ⁇
  • the apparatus and the method that can inject an ink droplet from a recording head with stability by stabilizing the vibration of the meniscus of a nozzle that does not perform injection, the nozzle adjacent to a nozzle that performs injection, when an ink droplet is injected from a recording head of shear mode type by time division driving by using low-viscosity ink, the recording head of shear mode type that causes shear deformation of a partition wall shared by adjacent channels as an actuator.
  • FIG. 1 is a diagram showing a schematic configuration of an ink-jet recording apparatus which is an application example of a droplet injection apparatus according to the invention.
  • a recording medium 10 is held by being sandwiched between a transport roller pair 22 of a transport mechanism 2 and is transported in a Y direction (a subscanning direction) shown in the drawing by a transport roller 21 which is driven and rotated by a transport motor 23.
  • a recording head 3 is provided in such a way as to face a recording surface 10a of the recording medium 10.
  • the recording head 3 is disposed and mounted on a carriage 5 in such a way that the nozzle surface thereof faces the recording surface 10a of the recording medium 10 and is electrically connected, via a flexible cable 6, to a drive signal generating section 100 (see FIGs. 4A to 4C ) which is a drive signal generating unit provided in a drive circuit.
  • the carriage 5 is provided in such a way that the carriage 5 can reciprocate, by an unillustrated driving unit along guide rails 4 that are put across the recording medium 10 in the width direction thereof, in an X-X' direction (a main scanning direction) shown in the drawing, the X-X' direction that is virtually perpendicular to the transport direction (the subscanning direction) in which the recording medium 10 is transported.
  • the recording head 3 moves above the recording surface 10a of the recording medium 10 in the X-X' direction shown in the drawing with the movement of the carriage 5 in the main scanning direction and injects an ink droplet out of a nozzle during this movement. In this way, the recording head 3 records a desired ink-jet image.
  • FIGs. 2A and 2B are diagrams showing an example of the recording head 3 forming the droplet injection apparatus in the invention, FIG. 2A being a perspective view showing the appearance of the recording head 3 in cross section and FIG. 2B being a sectional view of the recording head 3 viewed from the side thereof.
  • the recording head 3 includes a channel substrate 30.
  • a large number of narrow groove-shaped channels 31 and partition walls 32 are arranged alternately with one another.
  • a cover substrate 33 is provided on a top face of the channel substrate 30, in such a way as to cover all the channels 31.
  • a nozzle plate 34 is bonded, and the surface of the nozzle plate 34 forms a nozzle surface.
  • An end of each channel 31 communicates with the outside via a nozzle 34a formed in the nozzle plate 34.
  • each channel 31 becomes gradually shallow with respect to the channel substrate 30 and communicates with a common channel 33a which is formed in the cover substrate 33 and shared by the channels 31.
  • the common channel 33a is closed with a plate 35, and the common channel 33a and the channels 31 are supplied with ink through an ink feed pipe 35b via an ink supply port 35a formed in the plate 35.
  • Each partition wall 32 is formed of a piezoelectric material such as PZT which is an electromechanical converting unit, and functions as an actuator of the invention.
  • PZT piezoelectric material
  • an upper wall portion 32a and a lower wall portion 32b are formed of a piezoelectric material subjected to polarization treatment and the upper wall portion 32a and the lower wall portion 32b are opposite in polarization direction (indicated with arrows in FIG. 2B ) is shown.
  • a portion formed of a piezoelectric material subjected to polarization treatment may be only a portion with a reference character 32a, for example, and simply has to be at least part of the partition wall 32.
  • the partition walls 32 and the channels 31 are arranged alternately with one another. Therefore, one partition wall 32 is shared by the channels 31 and 31 on both sides thereof.
  • drive electrodes (not shown in FIGs. 2A and 2B ) are formed from the wall surfaces of the partition walls 32 to the bottom face of the channel 31.
  • a drive signal of a predetermined voltage is applied to the drive electrodes sandwiching the partition wall 32 from the drive signal generating section 100 provided in the drive circuit, which will be described later, the partition wall 32 undergoes shear deformation at the bonded surface between the upper wall portion 32a and the lower wall portion 32b.
  • a pressure wave is generated and pressure for injecting ink out of the nozzle 34a is provided to the ink in the channel 31.
  • the recording head 3 is a recording head of shear mode type in which the inside of the channel 31 surrounded with the channel substrate 30, the cover substrate 33, and the nozzle plate 34 forms a pressure generating chamber, the recording head of shear mode type that injects ink in the channel 31 out of the nozzle 34a by shear deformation of the partition wall 32.
  • the ink in the channel 31 of the recording head 3 is low-viscosity ink having a viscosity of less than 5.0 ⁇ 10 -3 Pa ⁇ sec.
  • the viscosity of ink is set at the viscosity at room temperature (25°C).
  • the viscosity of ink has a temperature dependence, and there are cases in which the ink is used after the viscosity thereof is lowered by providing an unillustrated heating device in an ink supplying unit or the recording head 3 and increasing the temperature of the ink.
  • the viscosity of ink is a viscosity measured at a set temperature to which the ink used for injection is heated.
  • the drive signal generating section 100 provided in the drive circuit that is electrically connected to the recording head 3 via the flexible cable 6 generates a drive signal containing a plurality of drive pulses causing an ink droplet to be injected.
  • FIG. 3 An example of the drive signal used in the invention is shown in FIG. 3 .
  • the drive signal shown in Fig. 3 contains a first pulse Pa that is formed as a rectangular wave of a positive voltage (+Von) and increases the volume of the channel and restores the volume to the original volume after a lapse of a given period of time in a drive period T, and a second pulse Pb that is formed as a rectangular wave of a negative voltage (-Voff) and reduces the volume of the channel and restores the volume to the original volume after a lapse of a given period of time in the drive period T.
  • a first pulse Pa that is formed as a rectangular wave of a positive voltage (+Von) and increases the volume of the channel and restores the volume to the original volume after a lapse of a given period of time in a drive period T
  • a second pulse Pb that is formed as a rectangular wave of a negative voltage (-Voff) and reduces the volume of the channel and restores the volume to the original volume after a lapse of a given period of time in the drive period T.
  • the given period of time which is the duration of time in which the volume of the channel is increased or reduced is represented as an AL (acoustic length).
  • the AL corresponds to 1/2 of an acoustic resonance period of a pressure wave in the channel.
  • the AL is obtained as a pulse width at which the flying speed of an ink droplet becomes maximum when the speed of an ink droplet that is injected at the time of application of a drive pulse of a rectangular wave to the drive electrode is measured and the pulse width of the rectangular wave is varied by making the voltage value of the rectangular wave constant.
  • the pulse is a rectangular wave of a constant-voltage peak value.
  • the pulse width is defined as the time between the rising edge 10% from 0V and the falling edge 10% from the peak value voltage.
  • the rectangular wave refers to a waveform whose rising edge time and falling edge time between 10% and 90% of a voltage fall within 1/2 of the AL, preferably 1/4 of the AL.
  • the meniscus responds quickly to the application of a drive signal formed as a rectangular wave, it is possible to keep the drive voltage low.
  • a voltage is always applied to the recording head 3 irrespective of whether injection is performed or not, a low drive voltage is important in reducing heat generation of the head and injecting an ink droplet with stability.
  • the circuit configuration can be simplified as compared to a case in which a trapezoidal wave having an inclined wave is used.
  • FIGs. 4A to 4C show part of the cross-section of the recording head 3 obtained by cutting the recording head 3 in a direction perpendicular to the length direction of the channel 31.
  • FIGs. 4A to 4C show three adjacent channels 31 (31A, 31B, and 31C) of a large number of channels 31.
  • One end of each channel 31 connects to the nozzle 34a formed in the nozzle plate 34 shown in FIGs. 2A and 2B and the other end connects to an unillustrated ink tank by the ink tube 35b via the ink supply port 35a.
  • drive electrodes 36A, 36B, and 36C extending toward the bottom faces of the channels 31 are formed in such a way as to be attached firmly to the surfaces of the partition walls 32.
  • the drive electrodes 36A, 36B, and 36C are electrically connected to the drive signal generating section 100.
  • the partition walls 36A, 36B, and 36C are not deformed.
  • FIG. 4A when the drive electrodes 36A and 36C are grounded and the drive signal shown in FIG. 3 is applied to the drive electrode 36B, an electric field in a direction perpendicular to the polarization direction of the piezoelectric material forming the partition walls 32B and 32C is generated by the first pulse Pa.
  • the partition walls 32B and 32C shear deformation appears in the bonded surfaces of the upper and lower partition walls 32a and 32b, and, as shown in FIG. 4B , the partition walls 32B and 32C are deformed outwardly and increase the volume of the channel 31 B. This generates a negative pressure in the channel 3 1 B and allows the ink to flow thereinto (Draw).
  • the pressure in the channel 31 B is inverted once every AL, when this state is maintained for 1 AL, the pressure in the channel 31 B is inverted and becomes a positive pressure.
  • the drive electrode 36B is grounded at this time, the partition walls 32B and 32C return from expansion positions shown in FIG. 4B to neutral positions shown in FIG. 4A , and a high pressure is applied to the ink in the channel 31 B (Release).
  • the partition walls 32B and 32C are deformed in opposite directions and reduce the volume of the channel 32B. Since the second pulse Pb is applied at a time point at which the pressure in the channel 31B is inverted and becomes a positive pressure after the application of the first pulse Pa, the positive pressure wave caused by a reduction of the volume of the channel 32B is added thereto. This increases the injection pressure (the injection speed) of the ink droplet and makes it possible to obtain the most efficient injection power. As a result, the drive voltage can be lowered and therefore power consumption can be reduced.
  • the pulse width PWon of the first pulse Pa is 1 AL.
  • the pulse width PWon of the first pulse Pa in the invention simply has to fall within a range of 0.7 AL or more but 1.3 AL or less, which is in the neighborhood of 1 AL.
  • the ratio of PWon to PWoff (PWon/PWoff) is 0.45 ⁇
  • FIGs. 5A to 5C An injection operation by such 3-cycle driving will be further described by using FIGs. 5A to 5C .
  • a description will be given with the assumption that the recording head includes nine channels 31: A1, B1, C1, A2, B2, C2, A3, B3, and C3.
  • the nozzle is not shown in the drawing.
  • a timing chart of a drive signal which is applied to drive the channels 31 of groups A, B, and C is shown in FIG. 6 .
  • Such deformation of the partition wall 32 of the recording head 3 of shear mode type appears due to a difference in voltage applied to the drive electrodes provided on both sides of the partition wall 32 in such a way as to sandwich the partition wall 32. Therefore, when the drive signal shown in FIG. 3 is used, the same operation can also be performed by grounding the drive electrode in the channel 31 that performs injection of an ink droplet and applying the second pulse Pb to the drive electrodes in the channels 31 on both sides thereof as a pulse of a positive voltage (+Voff) as shown in FIG. 7 instead of applying the second pulse Pb which is a negative voltage (-Voff) to the drive electrode in the channel 31 that performs injection of an ink droplet.
  • the channels 31 of the group A are operated as injection channels, it is necessary simply to ground the drive electrodes in the channels 31 of the group A immediately after the falling edge of the first pulse Pa after applying the first pulse Pa (+Von) to the drive electrodes in the channels 31 of the group A and at the same time applying the second pulse Pb (+Voff) to the drive electrodes in the channels 31 of the group B and the group C on both sides of the channels 31 of the group A, the channels 31 of the group B and the group C sharing the partition walls with the channels 31 of the group A.
  • This method is desirable because it is possible to perform driving only with a positive voltage.
  • FIG. 8 depicts the time change in the amount of extrusion of meniscus of a specific non-driven channel of the group A when 3-cycle driving (driving on alternate channels) is performed by using ink having a viscosity of 3.8 ⁇ 10 -3 Pa ⁇ sec.
  • a specific non-injection channel an odd-numbered channel
  • the group A when even-numbered channels of the channels are driven as injection channels that perform ink injection in the order of the group A, the group B, and the group C (A cycle ⁇ B cycle ⁇ C cycle).
  • a stable speed upper limit and generation of satellite spray when 3-cycle driving was performed by changing the ratio of the voltage Von of the first pulse to the voltage Voff of the second pulse (
  • the recording head had 256 nozzles, the nozzle diameter was 30 ⁇ m, AL was 5.6 ⁇ s, the pulse width PWon of the first pulse of the drive signal was 5.6 ⁇ s (1 AL), the pulse width PWoff of the second pulse was 11.2 ⁇ s (2 AL), and the drive period T was 28 ⁇ s (5 AL).
  • the stable speed upper limit means an injectable maximum flying speed (m/s) observed immediately before injection of an ink droplet becomes impossible when the air is sucked into the nozzle as a result of the flying speed being increased by increasing the voltage without changing
  • the stable speed upper limit was obtained by measuring the flying speed by, in addition to the normal all-channel driving, a driving pattern (switching driving) in which driving of only even-numbered channels (2 (B cycle channel), 4 (A cycle channel), 6 (C cycle channel), 8 (B cycle channel) ...) and driving of only odd-numbered channels (1 (A cycle channel), 3 (C cycle channel), 5 (B cycle channel), 7 (A cycle channel) ... ) are switched once every a predetermined time (1 sec) and adopting a lower flying speed in the two evaluations.
  • a higher stable speed upper limit value is preferable because the higher the stable speed upper limit value, the wider the flying speed range of an ink droplet. Since an absence of injection causes serious image degradation, it is desirable that there is at least a difference of the order of 1.5 m/s between the speed which is actually used and the stable speed upper limit.
  • the apparatus the invention can be used with no trouble as long as the stable speed upper limit is 7.5 m/s or more.
  • the generation of satellite spray was evaluated as follows. An ink droplet was injected on recording paper by setting the flying speed of the ink droplet at 6 m/s, and the image quality of formed evaluation images including the above-described switching driving was visually checked by 10 people.
  • the criteria for evaluation are as follows. Few: 0 to 1 out of 10 people judged that satellite spray was noticeable Medium: 2 to 4 out of 10 people judged that satellite spray was noticeable Many: 5 or more out of 10 people judged that satellite spray was noticeable
  • Ink 1 Viscosity 3.8 ⁇ 10 -3 Pa ⁇ sec Surface tension 38 ⁇ 10 -3 N ⁇ m -1
  • Ink 2 Viscosity 4.3 ⁇ 10 -3 Pa ⁇ sec Surface tension 56 ⁇ 10 -3 N ⁇ m -1

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EP20120199189 2011-12-27 2012-12-21 Droplet injection apparatus and method for driving droplet injection apparatus Not-in-force EP2610060B1 (en)

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JP2011286948A JP5867072B2 (ja) 2011-12-27 2011-12-27 液滴射出装置及び液滴射出装置の駆動方法

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EP3127704B1 (en) * 2014-03-31 2020-11-11 Konica Minolta, Inc. Inkjet head driving method and inkjet printing apparatus
CN107107614B (zh) * 2014-12-26 2020-01-21 柯尼卡美能达株式会社 液滴排出头的驱动方法及液滴排出装置
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JP2017170693A (ja) * 2016-03-22 2017-09-28 エスアイアイ・プリンテック株式会社 液体噴射ヘッド
JP6881899B2 (ja) * 2016-05-31 2021-06-02 東芝テック株式会社 インクジェットヘッド及びインクジェットプリンタ
CN106240159A (zh) * 2016-08-05 2016-12-21 武汉理工大学 一种用于喷墨印刷技术中精确处理第一液滴的预驱动方法
JP6907604B2 (ja) * 2017-03-06 2021-07-21 セイコーエプソン株式会社 液体噴射装置の制御方法および液体噴射装置

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JP5867072B2 (ja) 2016-02-24
CN103182842A (zh) 2013-07-03
EP2610060A1 (en) 2013-07-03
CN103182842B (zh) 2015-11-25
JP2013132900A (ja) 2013-07-08

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