EP3538373B1 - Verfahren zum bedrucken eines substrats mit variierendem muster von landezonen mittels ink-jet-druck - Google Patents

Verfahren zum bedrucken eines substrats mit variierendem muster von landezonen mittels ink-jet-druck Download PDF

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Publication number
EP3538373B1
EP3538373B1 EP17838120.8A EP17838120A EP3538373B1 EP 3538373 B1 EP3538373 B1 EP 3538373B1 EP 17838120 A EP17838120 A EP 17838120A EP 3538373 B1 EP3538373 B1 EP 3538373B1
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EP
European Patent Office
Prior art keywords
landing
landing zone
print head
substrate
nozzle
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
EP17838120.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3538373A1 (de
Inventor
Andreas DÖBELT
Rolf Schneider
Jan Schönefeld
Michael Doran
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.)
Plastic Logic Hk Ltd
Notion Systems GmbH
Original Assignee
Plastic Logic Hk Ltd
Notion Systems GmbH
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 Plastic Logic Hk Ltd, Notion Systems GmbH filed Critical Plastic Logic Hk Ltd
Priority to PL17838120T priority Critical patent/PL3538373T3/pl
Publication of EP3538373A1 publication Critical patent/EP3538373A1/de
Application granted granted Critical
Publication of EP3538373B1 publication Critical patent/EP3538373B1/de
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Anticipated expiration legal-status Critical

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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
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/001—Mechanisms for bodily moving print heads or carriages parallel to the paper surface
    • B41J25/003—Mechanisms for bodily moving print heads or carriages parallel to the paper surface for changing the angle between a print element array axis and the printing line, e.g. for dot density changes
    • 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
    • B41J2/04505—Control methods or devices therefor, e.g. driver circuits, control circuits aiming at correcting alignment
    • 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
    • B41J2/21—Ink jet for multi-colour printing
    • B41J2/2132—Print quality control characterised by dot disposition, e.g. for reducing white stripes or banding
    • 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
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • 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
    • B41J2/04586—Control methods or devices therefor, e.g. driver circuits, control circuits controlling heads of a type not covered by groups B41J2/04575 - B41J2/04585, or of an undefined type

Definitions

  • the invention relates to a method for printing a substrate by means of ink-jet printing.
  • landing zones which correspond to a landing zone type, are specified on the substrate in a landing zone grid consisting of landing zone rows and landing zone rows aligned perpendicular thereto.
  • the landing zone grid is aligned relative to the printhead in such a way that the rows of landing zones run essentially parallel to the printing direction, and the printhead is controlled such that one or more drops of one or more printhead nozzles generate a pattern of landing points within the landing zone.
  • the printhead nozzles generate fictitious nozzle lines on the substrate surface with a lateral resolution representing the distance between the nozzle lines.
  • FIG US 2014/184683 A1 One method of printing on a substrate is shown in FIG US 2014/184683 A1 disclosed.
  • the invention relates to the printing of both rigid and flexible substrates, in which a predetermined amount of functional liquid (called ink here) is to be dosed into several landing zones such as sensor areas, pixels, reaction areas for medical applications, etc.
  • ink functional liquid
  • the prerequisite for the method is of course that the position of the landing zones on the substrate must be known at least approximately.
  • the position of the landing zones there is known to be the possibility of determining the orientation of the substrate relative to the print heads, for example by means of a camera which records the alignment mark on the substrate and the coordinate position of the substrate is determined with a subsequent pattern recognition process.
  • the alignment markings were applied to the substrate in previous production steps and thus represent the geometry of the substrate in the pattern recognition process.
  • a substrate can have one or more types of landing zones. Different types of landing zones can, for example, have to be dosed with different inks or have different geometries. Furthermore, several substrates can be processed at the same time.
  • the state of the art of the above-mentioned method for metering functional liquids on substrates is that such a metering task is carried out by means of dispensers, chemical vapor deposition, analog printing methods and inkjet printing.
  • the invention relates to inkjet printing.
  • the invention relates to the situations described above in which the adaptation of the lateral resolution to the landing zone raster by rotating the print head relative to the substrate or, more precisely, to the printing direction should not be carried out or cannot be carried out or is not advantageous.
  • the lateral resolution is increased by selecting a print head with a number of print nozzles in a print head nozzle line, the distance between which is less than the minimum distance between the rows of landing zones.
  • the method can be designed in that the lateral resolution is increased by selecting a print head in which at least one second print head nozzle line offset from a first print head nozzle line transversely to the printing direction is arranged.
  • the lateral resolution is increased by rotating the print head relative to the printing direction, such that its print head nozzle line (s) enclose an angle between> 0 ° and ⁇ 90 ° to the printing direction.
  • lateral resolution is increased by traversing the print head n times relative to the substrate, the print head being displaced transversely to the printing direction with each pass.
  • the Position of the landing points within their landing zones is randomized. Since the positions of the landing points are chosen randomly within the permissible limits, repetitive patterns that would be visible due to their repetitive structure are avoided. The landing points can then be positioned by adding or subtracting a randomly selected value in the position coordinates.
  • a pattern of landing points in an individual landing zone is printed by more than one, advantageously several, nozzles.
  • a repetitive structure can also be avoided in this way.
  • Another possibility for avoiding repetitive structures is that the pattern of the landing points is randomly shifted from landing zone to landing zone by one or more lateral resolution steps.
  • control of the nozzles for a respective landing zone is random or pseudo-random.
  • the pattern of the landing points is selected by a combination of nozzles with different drop volumes in such a way that the amount of ink deposited in similar landing zones deviates by a maximum of 10%.
  • the dosage of drops in a landing zone takes place in such a way that those nozzles which the corresponding Sweep over the landing zone as a result of the relative movements, apply a defined number of drops to one or more landing points within the landing zone.
  • the number of drops is specified in the nozzle control scheme or in the type of landing zone.
  • the position of the landing zones is determined by scanning alignment markings on the substrate, that their actual positions are compared with the target positions of an undistorted substrate, that distortions within the substrate beyond linear position deviations and angular deviations of the substrate are compared Substrate are determined and that the position of the landing zones are calculated according to the distortions of the substrate by means of a mathematical model.
  • landing zones it is possible for landing zones to be used as alignment marks.
  • the exemplary embodiment relates to a method for printing flexible substrates.
  • RGB red, green, blue
  • Typical numbers of pixels in an active matrix display are between a few thousand and a few million pixels per display. Common screen resolutions are between 50ppi and over 300ppi.
  • RGBW red, green, blue, white, where W is not printed. While in this exemplary embodiment each color has only one geometry of the landing zone and in particular the geometry of the landing zones R, G and B is chosen to be the same in the example, the geometry of the landing zones can generally also be different and more than one geometry, ie more than one type of landing zone per Color exist.
  • a flexible EPD electronic paper display
  • TFT thin film transistor
  • an RGB filter is printed on top of the b / w TFT pixel, with each color pixel usually being slightly smaller than the TFT pixel size (e.g. 150 ⁇ m).
  • the resulting color display resolution here is 75 ppi.
  • An important criterion is the placement of color pixels, consisting of landing points of ink jet drops, in each TFT pixel, ie each landing zone, as shown in FIG Fig. 4 is shown. While other criteria could also apply, it is a condition that the color pixel within the TFT pixel must not overlap into neighboring TFT pixels, but rather must lie within the TFT pixel area for all pixels via an active matrix display.
  • Typical color ink jet printers for color filter printing on an active matrix display use print heads with a native resolution of up to 600 ppi and a single droplet size of> 30 ⁇ m.
  • Active matrix display arrays typically have an orthogonal (linear / rectangular) arrangement of TFT pixels across the display area.
  • the color filter printing process described above is based on the exact position of each subpixel and external alignment marks, which allow only slight deviations (a few ⁇ m at most). This is not a problem as active display arrays are typically created on rigid glass substrates.
  • the printing process of a flexible high resolution display is typically performed while the flexible substrate is bonded to a rigid glass support.
  • the arrangement remains rigid and the following color filter printing process can rely on known subpixel positions with respect to the alignment marks as dictated by the design.
  • the manufacturing flow may require color filter printing after the flexible substrate (with the completed TFT array process) is released from the rigid glass support.
  • each flexible substrate e.g. PEN, PI, PET, ...) is detached from its rigid (glass) carrier, the flexible substrate experiences significant distortion. Both the alignment marks and the TFT pixel positions of the display panel will shift nonlinearly.
  • the amount of displacement as shown in Fig. 9 increases as the display size increases. Any change in temperature also has a significant expansion / retraction effect on the flexible substrate. As a result, the alignment marks no longer match the design position, the TFT pixel position with respect to alignment marks no longer matches the design position, and all TFT pixel positions in the array will also deviate from the design positions. Offsets can range from 5 ⁇ m to a few hundred ⁇ m. The offset values (distortion) are different for each display. But color filter printing requires a precise pixel position; any deviation of> 5-10 ⁇ m would make the color filter process impossible, since color pixels can no longer be printed exactly in TFT pixels. This maximum permissible deviation is exceeded in that the flexible substrate is detached from the rigid carrier and the flexible substrate is distorted.
  • the ink jet printing machine would scan alignment marks with feature recognition (e.g., at the four corners of a display) and find non-rectangular positioning of those alignment marks.
  • Non-linearly shifted TFT pixel positions cannot be determined, calculated and compensated. Only an average rectangular grid can be calculated and used for the print position calculation. The actual TFT pixel positions give way however, by more than 5-10 ⁇ m for most of the display area from which the print result will suffer.
  • the approach to overcoming the problem is to combine two concepts.
  • a high-resolution ink-jet print head is used for color filter printing, which compensates for distortions while maintaining a high production throughput.
  • a lateral resolution is used with a high-resolution printhead for correcting pixel positions in the y-direction.
  • the lateral resolution is, for example, 1200 dpi and when printing with 2400 dpi (in two passes) the distance a between the points is 10.58333333 ⁇ m.
  • the TFT pixel design of the display has an exact size of 170 ⁇ m (pixel to pixel). The effect is that the lateral resolution of the printhead cannot be divided equally by the resolution of the pixel size.
  • the print resolution can be increased to 4800 dpi (4swaths).
  • the resulting "jump” will now happen every 8 TFT pixels and the "jump” is now only ⁇ 5m. This reduces the visual effect, but does not eliminate it. It also increases process time by a factor of two, which is undesirable in the mass production environment.
EP17838120.8A 2016-11-08 2017-11-09 Verfahren zum bedrucken eines substrats mit variierendem muster von landezonen mittels ink-jet-druck Active EP3538373B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL17838120T PL3538373T3 (pl) 2016-11-08 2017-11-09 Sposób zadrukowywania podłoża o zmiennym wzorze stref lądowania za pomocą druku atramentowego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP16197851 2016-11-08
PCT/EP2017/001300 WO2018099583A1 (de) 2016-11-08 2017-11-09 Verfahren zum bedrucken eines substrats mit variierendem muster von landezonen mitteils ink-jet-druck

Publications (2)

Publication Number Publication Date
EP3538373A1 EP3538373A1 (de) 2019-09-18
EP3538373B1 true EP3538373B1 (de) 2021-01-06

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EP17838120.8A Active EP3538373B1 (de) 2016-11-08 2017-11-09 Verfahren zum bedrucken eines substrats mit variierendem muster von landezonen mittels ink-jet-druck

Country Status (6)

Country Link
US (1) US10981394B2 (zh)
EP (1) EP3538373B1 (zh)
CN (1) CN110167761B (zh)
PL (1) PL3538373T3 (zh)
RU (1) RU2736450C1 (zh)
WO (1) WO2018099583A1 (zh)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111613650B (zh) * 2020-05-18 2023-10-10 深圳市华星光电半导体显示技术有限公司 显示面板母板及显示面板喷墨打印方法
CN112330722A (zh) * 2020-09-17 2021-02-05 敬业（东莞）印刷包装厂有限公司 一种用于喷墨打样的精准定位方法、存储介质及终端
US11829022B2 (en) 2020-12-08 2023-11-28 E Ink Holdings Inc. Color filter array and color electrophoretic display having the same
DE102021107415A1 (de) * 2021-03-24 2022-09-29 Notion Systems GmbH Verfahren zum Bedrucken eines Subtrats mittels Inkjet-Druck

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US7296878B2 (en) * 2005-03-30 2007-11-20 Fujifilm Corporation Liquid ejection head, liquid ejection apparatus and image forming apparatus
US20080291228A1 (en) * 2007-05-21 2008-11-27 White John M Methods and apparatus for inkjet printing with multiple rows of print heads
CN102131645B (zh) * 2008-06-30 2014-03-12 富士胶卷迪马蒂克斯股份有限公司 用于喷墨的装置及打印方法
JP5599239B2 (ja) * 2010-06-28 2014-10-01 富士フイルム株式会社 インクジェット印刷装置及びその印刷方法
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KR20230106718A (ko) 2012-12-27 2023-07-13 카티바, 인크. 정밀 공차 내로 유체를 증착하기 위한 인쇄 잉크 부피제어를 위한 기법
JP6384101B2 (ja) * 2014-04-21 2018-09-05 セイコーエプソン株式会社 記録装置、及び、記録方法
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Also Published As

Publication number Publication date
CN110167761A (zh) 2019-08-23
EP3538373A1 (de) 2019-09-18
US10981394B2 (en) 2021-04-20
WO2018099583A8 (de) 2018-09-13
CN110167761B (zh) 2021-02-02
PL3538373T3 (pl) 2021-08-23
US20190337302A1 (en) 2019-11-07
RU2736450C1 (ru) 2020-11-17
WO2018099583A1 (de) 2018-06-07

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