EP4091819B1 - Ink-jet recording device and recording operation driving method - Google Patents

Ink-jet recording device and recording operation driving method Download PDF

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Publication number
EP4091819B1
EP4091819B1 EP20914016.9A EP20914016A EP4091819B1 EP 4091819 B1 EP4091819 B1 EP 4091819B1 EP 20914016 A EP20914016 A EP 20914016A EP 4091819 B1 EP4091819 B1 EP 4091819B1
Authority
EP
European Patent Office
Prior art keywords
ink
ejection
drive pulse
nozzle
ejection drive
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.)
Active
Application number
EP20914016.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP4091819A4 (en
EP4091819A1 (en
Inventor
Xinze Li
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
Publication of EP4091819A1 publication Critical patent/EP4091819A1/en
Publication of EP4091819A4 publication Critical patent/EP4091819A4/en
Application granted granted Critical
Publication of EP4091819B1 publication Critical patent/EP4091819B1/en
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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 ink-jet recording device and a recording operation driving method.
  • the ink-jet recording device is equipped with the ink-jet head, which has a number of nozzles that eject tiny ink droplets.
  • Patent Document 1 supplies, to the ink-jet head, a non-ejection drive voltage that moves the meniscus to the outside of the non-ejection nozzle in order to prevent ejection errors caused by foreign matter attached to the nozzle edges.
  • the relationship between the diameter dn of the non-ejection nozzle and the meniscus diameter dm, which is moved to the outside of the non-ejection nozzle, is 1.1 ⁇ dm/dn ⁇ 1.4.
  • Patent Document 1 JP 2013-199021 A
  • JP2013-240947 discloses the preamble of claims 1 and 9.
  • the present invention has been made in consideration of the above problems in the conventional techniques, and an object of the present invention is to stably eject large droplets by the ink-jet recording device.
  • an ink-jet recording device according to claim 1.
  • the present invention it is possible to stably eject large droplets by the ink-jet recording device.
  • the ink-jet recording device 1 includes the conveyance unit 10, the recording operation unit 20, the cleaning unit 30, the controller 40, the storage 50, the communication unit 70, the operation receiving unit 81, the display 82, the power supply unit 90, etc.
  • the conveyance unit 10 moves the recording media on which images are to be recorded to face the recording range by the recording operation unit 20.
  • the conveyance unit 10 includes, for example, a conveyance motor 14 that draws out long recording media rolled up at a predetermined speed.
  • the recording medium is, for example, woven fabric, but may be other materials such as paper.
  • the recording operation unit 20 records images by ejecting ink onto the recording media.
  • the recording operation unit 20 includes: the ink-jet head 21 that includes multiple nozzles 27 which are arranged in a predetermined pattern to eject ink, and piezoelectric elements 26 which deform ink channels (pressure chambers) that supply ink to the nozzles 27 and provide pressure fluctuations to the ink; and the head driving unit 25 that outputs a drive pulse voltage that deforms each piezoelectric element 26.
  • the cleaning unit 30 is equipped with a wiping member 32 that removes ink, its solidified matter, etc. adhering to the nozzle surface where nozzle 27 openings are arranged, and a driving unit 31 that operates said wiping member 32.
  • the wiping member 32 is not limited to any particular material, but can be, for example, a nonwoven fabric that absorbs ink or a resin member in a blade form that scrapes off solids.
  • the controller 40 is a processor that controls the overall operation of the ink-jet recording device 1.
  • the controller 40 is equipped with, for example, a CPU 41 (Central Processing Unit) and RAM42 (Random Access Memory), etc.
  • the CPU 41 performs arithmetic operations and various control processes.
  • the RAM 42 provides working memory space for CPU 41 and stores temporary data.
  • the storage 50 stores image data to be recorded and its processing data, as well as other setting data and programs.
  • Image data may be stored, for example, in DRAM, which allows for temporary large-capacity storage and high-speed output.
  • the setting data and programs are stored in non-volatile memory such as flash memory and/or HDD (Hard Disk Drive), which can be stored even when the power supply to the ink-jet recording device 1 is stopped.
  • the communication unit 70 controls data transmission and reception with external devices according to a predetermined communication standard (e.g., TCP/IP).
  • the communication unit 70 may be connected to a LAN (Local Area Network) or the like and be able to connect to the external Internet via a router or the like, or it may connect directly to peripheral devices via a USB cable connected to the USB terminal.
  • a predetermined communication standard e.g., TCP/IP.
  • the communication unit 70 may be connected to a LAN (Local Area Network) or the like and be able to connect to the external Internet via a router or the like, or it may connect directly to peripheral devices via a USB cable connected to the USB terminal.
  • LAN Local Area Network
  • the power supply unit 90 supplies power to the ink-jet recording device 1 from a power source.
  • the head driving unit 25 applies, to the piezoelectric element 26, a drive pulse voltage P that expands and contracts the pressure chamber 28. Two types of drive pulse voltages P (Pa, Pb) shown in FIG. 4 are used.
  • the head driving unit 25 can apply the ejection drive pulse Pa that causes ink to be ejected from the nozzle 27 and the non-ejection drive pulse Pb that causes the meniscus 22 formed at the nozzle 27 to behave without ejecting ink from the nozzle 27.
  • the voltage value of ejection drive pulse Pa is Va and the pulse width (time from the rise of the pulse to the start of its fall) is Pwa, and the voltage value of non-ejection drive pulse Pb is Vb and the pulse width is Pwb.
  • n 8.
  • the ink-jet recording device 1 uses the recording method of expressing gradation by this.
  • the non-ejection period Tb is equal to the ink ejection period Ta for one dot formation and corresponds to cycle T.
  • the voltage value Vb of the non-ejection drive pulse Pb is set lower than the voltage value Va of the ejection drive pulse Pa.
  • the pulse width Pwb of the non-ejection drive pulse Pb is set narrower than the pulse width Pwa of the ejection drive pulse Pa. This is to prevent ink ejection from occurring due to the application of the non-ejection drive pulse Pb.
  • the meniscus 22 is set to behave to a degree large enough to be close to the time of ejection, with the condition that ink ejection does not occur when the non-ejection drive pulse Pb is applied. For this reason, the pulse width is set to satisfy the condition of 0.6Pwa ⁇ Pwb ⁇ Pwa.
  • the voltage values preferably satisfy the condition of 0.3 ⁇ Vb/Va ⁇ 0.5.
  • the ink ejection period Ta and ink non-ejection period Tb during the recording operation are for individual nozzles.
  • the ink ejection period Ta or ink non-ejection period Tb is not fixed for the entire device, since when one nozzle is in ink ejection period Ta, another nozzle may be in ink non-ejection period Tb.
  • FIG. 5 shows the drive pulses of the comparative example.
  • This comparative example differs in that no pulse voltage is applied during the ink non-ejection period Tb, and, in the other respects, is the same as the drive pulses of the embodiment shown in FIG. 4 .
  • the meniscus 22a is kept concave at approximately the ejection opening position of the nozzle 27, as shown in FIG. 6 .
  • the ink enters the ink non-ejection period Tb after continuous ejection as shown in FIG. 7 , the meniscus 22b is at the back of nozzle 27, and over time, the vibration dampens and the ink supply brings the position of the meniscus 22b closer to the ejection opening of the nozzle 27.
  • the position and vibration of the meniscus 22b is unstable and varies at the start of the ink ejection period Ta following the ink non-ejection period Tb.
  • the meniscus becomes unstable due to the repetition of the FIG. 6 and FIG. 7 states.
  • ejection is more likely to be unstable due to non-ejection of droplets and flying bending of droplets, etc.
  • in the ink non-ejection period Tb there is a constant vibration of the meniscus with a frequency and amplitude that approximates to the ink ejection period Ta and is dynamically stable with behavior similar to that of the ink ejection period Ta.
  • the ink ejection period Ta following the ink non-ejection period Tb has 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 is preferable.
  • m n, as in the embodiment.
  • the same number of meniscus vibration can occur in ink non-ejection period Tb as in ink ejection period Ta, and ink ejection is stable in the next ink ejection period Ta.
  • the condition of 20 ⁇ m ⁇ dn ⁇ 50 ⁇ m is satisfied when the ejection opening diameter of the nozzle 27 is dn. More preferably, the condition of 30 ⁇ m ⁇ dn ⁇ 50 ⁇ m is particularly satisfied.
  • the present invention is applicable to an ink-jet recording device.

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  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
EP20914016.9A 2020-01-15 2020-01-15 Ink-jet recording device and recording operation driving method Active EP4091819B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2020/001024 WO2021144877A1 (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

Publications (3)

Publication Number Publication Date
EP4091819A1 EP4091819A1 (en) 2022-11-23
EP4091819A4 EP4091819A4 (en) 2023-01-11
EP4091819B1 true EP4091819B1 (en) 2024-05-29

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ID=76863971

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Application Number Title Priority Date Filing Date
EP20914016.9A Active EP4091819B1 (en) 2020-01-15 2020-01-15 Ink-jet recording device and recording operation driving method

Country Status (4)

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EP (1) EP4091819B1 (https=)
JP (1) JP7367778B2 (https=)
CN (1) CN114981089B (https=)
WO (1) WO2021144877A1 (https=)

Family Cites Families (9)

* 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
JP3159188B2 (ja) 1998-10-20 2001-04-23 日本電気株式会社 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
JP5764513B2 (ja) 2012-03-23 2015-08-19 富士フイルム株式会社 液体吐出装置及びインクジェットヘッド駆動方法
JP5927035B2 (ja) * 2012-05-22 2016-05-25 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
WO2014037929A1 (en) * 2012-09-09 2014-03-13 Hewlett-Packard Industrial Printing Ltd. Maintenance of inkjet print head device
JP5863192B2 (ja) * 2013-01-29 2016-02-16 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
JP6035226B2 (ja) * 2013-10-31 2016-11-30 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
JP7006099B2 (ja) * 2016-12-22 2022-01-24 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

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Publication number Publication date
CN114981089B (zh) 2024-03-15
CN114981089A (zh) 2022-08-30
EP4091819A4 (en) 2023-01-11
WO2021144877A1 (ja) 2021-07-22
EP4091819A1 (en) 2022-11-23
JPWO2021144877A1 (https=) 2021-07-22
JP7367778B2 (ja) 2023-10-24

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