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WO2021144877A1 - Dispositif d'enregistrement à jet d'encre et procédé de pilotage d'opération d'enregistrement - Google Patents

Dispositif d'enregistrement à jet d'encre et procédé de pilotage d'opération d'enregistrement Download PDF

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Publication number
WO2021144877A1
WO2021144877A1 PCT/JP2020/001024 JP2020001024W WO2021144877A1 WO 2021144877 A1 WO2021144877 A1 WO 2021144877A1 JP 2020001024 W JP2020001024 W JP 2020001024W WO 2021144877 A1 WO2021144877 A1 WO 2021144877A1
Authority
WO
WIPO (PCT)
Prior art keywords
ink
nozzle
drive pulse
ejection
recording operation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2020/001024
Other languages
English (en)
Japanese (ja)
Inventor
シンズ 李
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Konica Minolta Inc
Original Assignee
Konica Minolta Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP2021571107A priority Critical patent/JP7367778B2/ja
Priority to EP20914016.9A priority patent/EP4091819B1/fr
Priority to PCT/JP2020/001024 priority patent/WO2021144877A1/fr
Priority to CN202080093239.1A priority patent/CN114981089B/zh
Publication of WO2021144877A1 publication Critical patent/WO2021144877A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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
    • B41J2/04595—Dot-size modulation by changing the number of drops per dot
    • 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
    • B41J2/04596—Non-ejecting pulses
    • 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 an inkjet recording device and a recording operation driving method.
  • an inkjet device that circulates ink through an inkjet head and ejects ink from a nozzle of the inkjet head.
  • an inkjet recording device is equipped with an inkjet head in which a large number of nozzles for ejecting minute ink droplets are arranged. Since these nozzles eject ink from a ejection port having a minute diameter, the state of the meniscus formed in the nozzles before ejection has a significant influence on the flying state of the droplets, that is, it is related to the image quality of the printed matter. Improving the stability of the droplets ejected from the inkjet head nozzle is an important issue because it affects the image quality of printed matter.
  • Patent Document 1 supplies the inkjet head with a non-ejection drive voltage that moves the meniscus to the outside of the non-ejection nozzle in order to prevent ejection abnormalities caused by foreign matter adhering to the edge of the nozzle.
  • the relationship between the diameter dn of the non-discharge nozzle and the meniscus diameter dm moved to the outside of the non-discharge nozzle satisfies 1.1 ⁇ dm / dn ⁇ 1.4.
  • Patent Document 1 aims to prevent discharge abnormalities due to foreign matter adhesion, and the meniscus formed by a non-discharge drive voltage is statically indeterminate. Even by forming a static meniscus at the time of non-ejection as in the invention described in Patent Document 1, it is not possible to eliminate the instability that causes non-ejection of droplets and flight bending at the time of subsequent ejection. ..
  • the present invention has been made in view of the above problems in the prior art, and an object of the present invention is to stably eject large droplets by an inkjet recording device.
  • One aspect of the present invention includes an inkjet head having a pressure chamber communicating with a nozzle and ejecting ink in the pressure chamber from the nozzle.
  • a head drive unit that drives a recording operation by the inkjet head is provided.
  • the head drive unit A drive pulse voltage that expands and contracts the pressure chamber, and is a non-ejection to the extent that the discharge drive pulse that ejects ink from the nozzle and the meniscus formed in the nozzle without ejecting ink from the nozzle behave.
  • the ejection drive pulse is applied as many times as the number of gradations n is applied to one dot landed on the recording medium, and the dots are applied according to the number of times.
  • Execute discharge drive to change the diameter During the ink non-ejection period during the recording operation, m non-ejection drive pulses, which are equal to or greater than the number of gradations n, are applied to the period equal to the ink ejection period for forming one dot.
  • An inkjet recording device that executes a non-ejection drive that causes the meniscus to behave.
  • Another aspect of the present invention is a recording operation driving method having a pressure chamber communicating with a nozzle and driving a recording operation by an inkjet head that ejects ink in the pressure chamber from the nozzle.
  • a drive pulse voltage that expands and contracts the pressure chamber, and is a non-ejection to the extent that the discharge drive pulse that ejects ink from the nozzle and the meniscus formed in the nozzle without ejecting ink from the nozzle behave.
  • the ejection drive pulse is applied as many times as the number of gradations n is applied to one dot landed on the recording medium, and the dots are applied according to the number of times.
  • a large droplet can be stably ejected by an inkjet recording device.
  • the inkjet recording device 1 includes a transport unit 10, a recording operation unit 20, a cleaning unit 30, a control unit 40, a storage unit 50, a communication unit 70, an operation reception unit 81, a display unit 82, and a power supply unit. 90 and the like are provided.
  • the transport unit 10 moves the recording medium on which the image is to be recorded so as to face the recording range of the recording operation unit 20.
  • the transport unit 10 includes, for example, a transport motor 14 that pulls out a long recording medium rolled up in a roll shape at a predetermined speed.
  • the recording medium is, for example, cloth, but may be another material such as paper.
  • the recording operation unit 20 performs an operation of ejecting ink onto a recording medium and recording an image.
  • the recording operation unit 20 is a piezoelectric element that deforms a nozzle 27 in which a large number of inks are arranged in a predetermined pattern to discharge ink and an ink flow path (pressure chamber) that supplies ink to the nozzle 27 to give pressure fluctuation to the ink.
  • It includes an inkjet head 21 having 26, a head drive unit 25 that outputs a drive pulse voltage that deforms each piezoelectric element 26, and the like.
  • the side wall 29 of the pressure chamber 28 communicating with the nozzle 27 is deformed and formed in the vicinity of the discharge opening of the nozzle 27 as shown in FIG.
  • the meniscus 22 is shaken to separate the ink droplet 23 from the meniscus 22 and eject it.
  • the cleaning unit 30 includes a wiping member 32 for removing ink and solidified substances thereof adhering to the nozzle surface where the openings of the nozzle 27 are arranged, a drive unit 31 for operating the wiping member 32, and the like.
  • the wiping member 32 is not particularly limited, but is, for example, a non-woven fabric that sucks ink, a resin member on a blade that scrapes solids, and the like.
  • the control unit 40 is a processor that controls the overall operation of the inkjet recording device 1.
  • the control unit 40 includes, for example, a CPU 41 (Central Processing Unit) and a RAM 42 (Random Access Memory).
  • the CPU 41 performs arithmetic operations and performs various control processes.
  • the RAM 42 provides the CPU 41 with a working memory space and stores temporary data.
  • the storage unit 50 stores image data to be recorded and its processing data, and stores other setting data, programs, and the like.
  • the image data may be stored in, for example, a DRAM capable of temporarily storing a large amount of data and outputting it at high speed.
  • the setting data, the program, and the like are stored in a non-volatile memory such as a flash memory that can be stored even when the power supply to the inkjet recording device 1 is stopped, and / or in an HDD (Hard Disk Drive) or the like.
  • the communication unit 70 controls data transmission / reception with an external device according to a predetermined communication standard (for example, TCP / IP).
  • the communication unit 70 may be connected to a LAN (Local Area Network) or the like and can be connected to the external Internet via a router or the like, or may be directly connected to a peripheral device via a USB cable connected to a USB terminal. It may be.
  • the power supply unit 90 supplies power to the inkjet recording device 1 from the power supply.
  • the head drive unit 25 applies a drive pulse voltage P that expands and contracts the pressure chamber 28 to the piezoelectric element 26.
  • As the drive pulse voltage P two types (Pa, Pb) shown in FIG. 4 are used.
  • the head drive unit 25 applies a discharge drive pulse Pa that ejects ink from the nozzle 27 and a non-ejection drive pulse Pb that causes the meniscus 22 formed in the nozzle 27 to behave without ejecting ink from the nozzle 27. It is made possible.
  • the voltage value of the discharge drive pulse Pa is Va
  • the pulse width time from the rise of the pulse to the start of the fall
  • the voltage value of the non-discharge drive pulse Pb is Vb
  • the pulse width is Pwb.
  • a pulse is applied to execute a discharge drive that changes the dot diameter according to the number of times.
  • n 8.
  • an ejection drive pulse Pa of 8 pulses is applied in the period T in order to form the largest dot diameter.
  • ink droplets are ejected as shown in FIG. 3 and land on the recording medium.
  • the number of pulses of the discharge drive pulse Pa the number of droplets to be discharged is selected and the dot diameter changes.
  • the inkjet recording device 1 employs a recording method that expresses gradation by this.
  • the voltage value Vb of the non-discharge drive pulse Pb is set lower than the voltage value Va of the discharge drive pulse Pa. Further, the pulse width Pwb of the non-discharge drive pulse Pb is set to be narrower than the pulse width Pwa of the discharge drive pulse Pa.
  • the pulse width should satisfy the condition of 0.6Pwa ⁇ Pwb ⁇ Pwa.
  • the voltage value may satisfy the condition of 0.3 ⁇ Vb / Va ⁇ 0.5. Either one of the voltage value Vb and the pulse width Pwb of the non-ejection drive pulse Pb may be equal to the ejection drive pulse Pa, or may be adjusted so that ink is not ejected by the other.
  • the ink ejection period Ta and the ink non-ejection period Tb during the recording operation are for individual nozzles.
  • the other nozzle may be in the ink non-ejection period Tb, so that the ink ejection period Ta or the ink non-ejection period Tb is not determined for the entire device.
  • FIG. 5 shows a drive pulse of a comparative example.
  • This comparative example differs in that the pulse voltage is not applied to the ink non-ejection period Tb, and is the same as the drive pulse of the present embodiment shown in FIG.
  • the meniscus 22a is kept concave at the substantially discharge opening position of the nozzle 27 as shown in FIG.
  • the ink non-ejection period Tb is entered after continuous ejection, the meniscus 22b is located behind the nozzle 27 as shown in FIG. 7, and the shaking is attenuated with the passage of time. Approaching.
  • the pulse voltage is not applied to the ink non-ejection period Tb
  • the position and the shaking state of the meniscus 22b are unstable and vary at the start of the next ink ejection period Ta of the ink non-ejection period Tb.
  • the state of FIG. 6 and the state of FIG. 7 are repeated, and the meniscus becomes unstable.
  • the ink ejection period Ta after the ink non-ejection period Tb there is a high possibility that the ejection becomes unstable due to non-ejection of droplets, flight bending, and the like.
  • the ink ejection period Ta next to the ink non-ejection period Tb is a condition close to the ink ejection period Ta before the ink ejection period Tb, and the ink ejection is as stable as in the case of continuous ejection.
  • m n as in the present embodiment.
  • the meniscus can be shaken as many times as the ink ejection period Ta, and the ink ejection becomes stable in the next ink ejection period Ta.
  • the discharge opening diameter of the nozzle 27 is dn, and the condition of 20 ⁇ m ⁇ dn ⁇ 50 ⁇ m is satisfied. More preferably, the condition of 30 ⁇ m ⁇ dn ⁇ 50 ⁇ m is particularly satisfied. Ink with a specific density greater than 1 is applied.
  • the condition of 1AL ⁇ Pwa ⁇ 1.4AL is satisfied. More preferably, 1.2AL ⁇ Pwa ⁇ 1.4AL is satisfied.
  • AL is half of the natural vibration cycle of the pressure chamber 28.
  • a large droplet can be stably ejected by the inkjet recording device.
  • the present invention can be used for an inkjet recording device.
  • Inkjet recording device 20 Recording operation unit 21 Inkjet head 22 Meniscus 23 Ink droplet 25 Head drive unit 27 Nozzle 28 Pressure chamber 40 Control unit P Drive pulse voltage T cycle

Landscapes

  • Particle Formation And Scattering Control In Inkjet Printers (AREA)

Abstract

L'invention concerne un dispositif d'enregistrement à jet d'encre dans lequel une unité de pilotage de tête destinée à piloter une opération d'enregistrement d'une tête à jet d'encre est conçue pour être capable d'appliquer une impulsion de pilotage de décharge Pa destinée à amener une encre à être déchargée depuis une buse, et une impulsion de pilotage de non-décharge Pb destinée à déplacer un ménisque formé dans la buse sans amener l'encre à être déchargée de la buse. En outre, l'unité de pilotage de tête réalise : pendant une période de décharge d'encre destinée à former un point pendant l'opération d'enregistrement, pilotage de la décharge au cours duquel l'impulsion de pilotage de décharge est appliquée un certain nombre de fois jusqu'à un nombre n de gradations par rapport à un point qui doit atterrir sur un support d'enregistrement, le diamètre du point étant modifié en fonction du nombre de fois ; et, pendant une période de non-décharge d'encre pendant l'opération d'enregistrement, un pilotage de non-décharge au cours duquel l'impulsion de pilotage de non-décharge est appliquée m fois, m étant égal ou supérieur au nombre n de gradations pendant une période égale à la période de décharge d'encre destinée à former le point, pour déplacer le ménisque.
PCT/JP2020/001024 2020-01-15 2020-01-15 Dispositif d'enregistrement à jet d'encre et procédé de pilotage d'opération d'enregistrement Ceased WO2021144877A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2021571107A JP7367778B2 (ja) 2020-01-15 2020-01-15 インクジェット記録装置及び記録動作駆動方法
EP20914016.9A EP4091819B1 (fr) 2020-01-15 2020-01-15 Dispositif d'enregistrement à jet d'encre et procédé de pilotage d'opération d'enregistrement
PCT/JP2020/001024 WO2021144877A1 (fr) 2020-01-15 2020-01-15 Dispositif d'enregistrement à jet d'encre et procédé de pilotage d'opération d'enregistrement
CN202080093239.1A CN114981089B (zh) 2020-01-15 2020-01-15 喷墨记录装置以及记录动作驱动方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2020/001024 WO2021144877A1 (fr) 2020-01-15 2020-01-15 Dispositif d'enregistrement à jet d'encre et procédé de pilotage d'opération d'enregistrement

Publications (1)

Publication Number Publication Date
WO2021144877A1 true WO2021144877A1 (fr) 2021-07-22

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PCT/JP2020/001024 Ceased WO2021144877A1 (fr) 2020-01-15 2020-01-15 Dispositif d'enregistrement à jet d'encre et procédé de pilotage d'opération d'enregistrement

Country Status (4)

Country Link
EP (1) EP4091819B1 (fr)
JP (1) JP7367778B2 (fr)
CN (1) CN114981089B (fr)
WO (1) WO2021144877A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000117969A (ja) * 1998-10-20 2000-04-25 Nec Corp インクジェット記録ヘッドの駆動方法
JP2004082718A (ja) * 2002-06-27 2004-03-18 Canon Inc インクジェット記録装置及びインクジェット記録方法
JP2013199021A (ja) 2012-03-23 2013-10-03 Fujifilm Corp 液体吐出装置及びインクジェットヘッド駆動方法
JP2013240947A (ja) * 2012-05-22 2013-12-05 Kyocera Document Solutions Inc インクジェット記録装置
WO2014037929A1 (fr) * 2012-09-09 2014-03-13 Hewlett-Packard Industrial Printing Ltd. Maintenance de dispositif de tête d'impression à jet d'encre
JP2014144591A (ja) * 2013-01-29 2014-08-14 Kyocera Document Solutions Inc インクジェット記録装置
JP2015085628A (ja) * 2013-10-31 2015-05-07 京セラドキュメントソリューションズ株式会社 インクジェット記録装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3730024B2 (ja) * 1998-08-12 2005-12-21 セイコーエプソン株式会社 インクジェット式記録ヘッドの駆動装置および駆動方法
JP6992379B2 (ja) * 2016-12-22 2022-01-13 セイコーエプソン株式会社 ヘッドユニット及び液体吐出装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000117969A (ja) * 1998-10-20 2000-04-25 Nec Corp インクジェット記録ヘッドの駆動方法
JP2004082718A (ja) * 2002-06-27 2004-03-18 Canon Inc インクジェット記録装置及びインクジェット記録方法
JP2013199021A (ja) 2012-03-23 2013-10-03 Fujifilm Corp 液体吐出装置及びインクジェットヘッド駆動方法
JP2013240947A (ja) * 2012-05-22 2013-12-05 Kyocera Document Solutions Inc インクジェット記録装置
WO2014037929A1 (fr) * 2012-09-09 2014-03-13 Hewlett-Packard Industrial Printing Ltd. Maintenance de dispositif de tête d'impression à jet d'encre
JP2014144591A (ja) * 2013-01-29 2014-08-14 Kyocera Document Solutions Inc インクジェット記録装置
JP2015085628A (ja) * 2013-10-31 2015-05-07 京セラドキュメントソリューションズ株式会社 インクジェット記録装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4091819A4

Also Published As

Publication number Publication date
CN114981089B (zh) 2024-03-15
EP4091819B1 (fr) 2024-05-29
EP4091819A4 (fr) 2023-01-11
EP4091819A1 (fr) 2022-11-23
CN114981089A (zh) 2022-08-30
JP7367778B2 (ja) 2023-10-24
JPWO2021144877A1 (fr) 2021-07-22

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