CN115610129A - Target substrate for inkjet printing process and inkjet printing method using the target substrate - Google Patents

Target substrate for inkjet printing process and inkjet printing method using the target substrate Download PDF

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Publication number
CN115610129A
CN115610129A CN202210853774.3A CN202210853774A CN115610129A CN 115610129 A CN115610129 A CN 115610129A CN 202210853774 A CN202210853774 A CN 202210853774A CN 115610129 A CN115610129 A CN 115610129A
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CN
China
Prior art keywords
inkjet printing
panel
distance
printing method
regions
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.)
Pending
Application number
CN202210853774.3A
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Chinese (zh)
Inventor
友枝哲
闵弘基
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Samsung Display Co Ltd
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Samsung Display Co Ltd
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Filing date
Publication date
Application filed by Samsung Display Co Ltd filed Critical Samsung Display Co Ltd
Publication of CN115610129A publication Critical patent/CN115610129A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/0041—Digital printing on surfaces other than ordinary paper
    • B41M5/0047—Digital printing on surfaces other than ordinary paper by ink-jet printing
    • 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
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/36—Blanking or long feeds; Feeding to a particular line, e.g. by rotation of platen or feed roller
    • B41J11/42—Controlling printing material conveyance for accurate alignment of the printing material with the printhead; Print registering
    • 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
    • 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
    • B41J2/07—Ink jet characterised by jet control
    • B41J2/11—Ink jet characterised by jet control for ink spray
    • 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
    • B41J2/135—Nozzles
    • B41J2/145—Arrangement thereof
    • 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
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H10K71/10—Deposition of organic active material
    • H10K71/12—Deposition of organic active material using liquid deposition, e.g. spin coating
    • H10K71/13—Deposition of organic active material using liquid deposition, e.g. spin coating using printing techniques, e.g. ink-jet printing or screen printing
    • H10K71/135—Deposition of organic active material using liquid deposition, e.g. spin coating using printing techniques, e.g. ink-jet printing or screen printing using ink-jet printing

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

The invention discloses an object substrate for an inkjet printing process and an inkjet printing method using the object substrate, the inkjet printing method according to one embodiment including: loading the target substrate on the stage; a step of disposing an ink jet head on the object substrate; and discharging ink onto the target substrate, wherein the target substrate includes: a plurality of panel regions arranged in a matrix form, wherein at least a portion of the plurality of panel regions are shifted along a first direction.

Description

Target substrate for inkjet printing process and inkjet printing method using the target substrate
Technical Field
The present disclosure relates to a target substrate for an inkjet printing process and an inkjet printing method using the target substrate.
Background
The Display device is a device for displaying an image, and includes a Liquid Crystal Display (LCD), an Organic Light Emitting Display (OLED), and the like. Such display devices are being used for various electronic apparatuses such as mobile phones, navigators, digital cameras, electronic books, portable game machines, or various terminals.
In the process of manufacturing such a display device, in order to form layers such as an organic light emitting layer, a color filter, and the like, an inkjet printing process may be utilized.
Disclosure of Invention
Solves the technical problem
Embodiments are directed to a target substrate for an inkjet printing process and an inkjet printing method using the target substrate, which increase the number of nozzles for discharging ink in one inkjet printing process, thereby improving the use ratio of the nozzles. It is therefore an object to provide an inkjet printing method using a nozzle having a stable discharge state.
Solving means
An object substrate for an inkjet printing process according to an embodiment includes: a plurality of panel regions arranged in a matrix form, wherein at least a portion of the plurality of panel regions are shifted along a first direction.
Each of the plurality of panel regions may include a plurality of pixel regions, and a distance between two adjacent pixel regions along the first direction among the plurality of pixel regions may be a first distance.
The first distance may be 0.2mm to 0.3mm.
A distance between edges of panel areas adjacent along a second direction perpendicular to the first direction among the plurality of panel areas may be a second distance.
The second distance may be 0.1mm to 0.15mm.
An inkjet printing method according to an embodiment includes: loading the target substrate on the stage; a step of disposing an ink jet head on the object substrate; and a step of discharging ink onto the target substrate while the inkjet head is moving, wherein the target substrate includes: a plurality of panel regions arranged in a matrix form, wherein at least a portion of the plurality of panel regions are shifted along a first direction.
The inkjet head may move in a second direction perpendicular to the first direction.
The inkjet head may include a plurality of nozzles, wherein the plurality of nozzles may include: a first nozzle group that discharges ink to a panel region arranged in an nth row among the plurality of panel regions; and a second nozzle group discharging ink to a panel region arranged in an n +1 th row among the plurality of panel regions.
The first nozzle group and the second nozzle group may include one or more nozzles different from each other.
The plurality of nozzles may further include a third nozzle group discharging ink to a panel region arranged in an n +2 th row among the plurality of panel regions.
The third nozzle group may include one or more nozzles different from the nozzles used in the first and second nozzle groups.
The first nozzle group, the second nozzle group, and the third nozzle group may be alternately arranged.
The inkjet head may include a plurality of nozzles, and more than 50% of the plurality of nozzles may be used in a process in which the inkjet head moves once in a second direction perpendicular to the first direction and discharges ink.
Each of the plurality of panel regions may include a plurality of pixel regions, and a distance between two pixel regions adjacent along the first direction among the plurality of pixel regions may be a first distance.
The first distance may be 0.2mm to 0.3mm.
A distance between edges of panel regions adjacent in a second direction perpendicular to the first direction among the plurality of panel regions may be a second distance.
The second distance may be 0.1mm to 0.15mm.
Each of the plurality of panel regions may include a plurality of pixel regions, a distance between two adjacent pixel regions along the first direction among the plurality of pixel regions may be a first distance, the plurality of panel regions may be shifted along the first direction by at least a second distance, and the second distance may be smaller than the first distance.
The panel regions of the plurality of panel regions arranged in the n +1 th row may be shifted by at least the second distance along the first direction with reference to edges of the panel regions of the plurality of panel regions arranged in the n-th row.
The panel regions of the plurality of panel regions arranged in the (n + 2) th row may be shifted by at least the second distance along the first direction with reference to edges of the panel regions of the plurality of panel regions arranged in the (n + 1) th row.
ADVANTAGEOUS EFFECTS OF INVENTION
By using the object substrate according to the embodiment, the number of nozzles discharging ink can be increased in a process in which the inkjet head moves once, thereby improving the usage rate of the nozzles. This makes it possible to provide an inkjet printing method using a nozzle having a stable discharge state. By using such an inkjet printing method, a display panel with improved reliability can be provided.
Drawings
Fig. 1 is a schematic plan view of a subject substrate according to an embodiment.
FIG. 2 is a perspective view of an inkjet printing apparatus according to one embodiment.
Fig. 3 is a schematic plan view of a print head unit according to an embodiment.
Fig. 4 is a schematic diagram illustrating operation of a print head unit according to one embodiment.
FIG. 5 is a flow chart relating to a method of inkjet printing according to one embodiment.
Fig. 6 is a schematic view regarding a display panel manufacturing method using an inkjet printing method according to an embodiment.
Fig. 7 is a schematic view regarding a display panel manufacturing method using an inkjet printing method according to a comparative example.
Description of reference numerals
SUB: target substrate STA: platform
AL: substrate alignment unit IH: ink jet head
NZ: nozzle NZ1: first nozzle group
NZ2: second nozzle group NZ3: third nozzle group
PA1, PA2, PA3: area of panel
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains can easily carry out the present invention. The present invention may be implemented in various forms and is not limited to the embodiments described herein.
In order to clearly explain the present invention, portions that are not relevant to the explanation are omitted, and the same reference numerals are given to the same or similar constituent elements throughout the specification.
In addition, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of explanation, and thus the present invention is not necessarily limited to the shown contents. In the drawings, the thickness is shown exaggerated for clarity of presentation of various layers and regions. In addition, in the drawings, the thickness of a part of layers and regions is exaggeratedly shown for convenience of explanation.
Further, when a portion of a layer, a film, a region, a plate, or the like is referred to as being "over" or "on" another portion, it includes not only a case of being "directly over" another portion but also a case of interposing another portion therebetween. Conversely, when a portion is referred to as being "directly over" another portion, it means that there is no other portion in the middle. Further, "above" or "upper" referred to as being positioned at a portion as a reference means being positioned above or below the portion as a reference, and does not necessarily mean being positioned "above" or "upper" in a direction opposite to the gravity.
In addition, when a part is referred to as "including" a certain component throughout the specification, unless otherwise specified, it means that other components may be included without excluding other components.
Further, throughout the specification, when referred to as "on a plane", it refers to a case where the object portion is viewed from above, and when referred to as "on a cross section", it refers to a case where the cross section after the object portion is vertically cut is viewed from the side.
Hereinafter, an object substrate for an inkjet printing process according to an embodiment will be described with reference to fig. 1. Fig. 1 is a schematic plan view of a subject substrate according to an embodiment.
Referring to fig. 1, the object substrate SUB for an inkjet printing process according to an embodiment may include a plurality of panel areas PA. The plurality of panel areas PA may be cut along the edges to form a plurality of panels. Although the present specification shows an embodiment in which one subject substrate SUB includes six panel areas PA, it is not limited to this number.
The plurality of panel areas PA according to one embodiment may be arranged in a state where a portion of the panel areas PA is shifted along the first direction DR 1. Specifically, the edges of the panel areas PA2 arranged in the second row may be arranged to be shifted by a second distance d2 along the first direction DR1 with reference to the edges of the panel areas PA1 arranged in the first row. Further, the edges of the panel areas PA3 arranged in the third row may be arranged to be shifted by a second distance d2 along the first direction DR1, with reference to the edges of the panel areas PA2 arranged in the second row. Although the present specification shows an embodiment in which the panel areas PA2, PA3 arranged in each of the second and third rows are arranged in a shifted state with respect to the panel area PA1 arranged in the first row, it is not limited thereto, and may be shifted in various forms. As one example, the panel areas PA2 arranged in the second row may be shifted with respect to the panel areas PA1 arranged in the first row, and the panel areas PA3 arranged in the third row may be aligned at the same positions as the panel areas PA1 arranged in the first row.
Each of the panel areas PA1, PA2, PA3 according to one embodiment may include a plurality of pixel areas PX1, PX2, PX3. A distance between two pixel regions adjacent along the first direction DR1 among the plurality of pixel regions PX1, PX2, PX3 is referred to as a first distance d1. The second distance d2 may be smaller than the first distance d1. As an example, the second distance d2 may be 50% or less of the first distance d1. The first distance d1 may be 0.2mm to 0.3mm, and the second distance d2 may be 0.1mm to 0.15mm.
An inkjet printing method using such a target substrate SUB will be described below.
Hereinafter, an inkjet printing apparatus using an inkjet printing method according to an embodiment will be described with reference to fig. 2 to 4. Fig. 2 is a perspective view of an inkjet printing apparatus according to an embodiment, fig. 3 is a schematic plan view of a print head unit according to an embodiment, and fig. 4 is a schematic view illustrating an operation of the print head unit according to an embodiment. The description of the same constitution as the foregoing will be omitted.
In fig. 2, a first direction DR1, a second direction DR2, and a third direction DR3 are defined. The first direction DR1 and the second direction DR2 are directions that are located on the same plane and are orthogonal to each other, and the third direction DR3 is a direction perpendicular to the first direction DR1 and the second direction DR2, respectively. It is to be understood that the first direction DR1 represents a lateral direction on the drawing, the second direction DR2 represents a longitudinal direction on the drawing, and the third direction DR3 represents upper and lower directions on the drawing.
Referring to fig. 2 to 4, the inkjet printing apparatus IP according to an embodiment may include: a print head unit HU including a plurality of inkjet heads IH, a base frame BF, a substrate alignment unit AL, a stage STA, and a sub-stage SSTA.
The base frame BF may include a support portion SUP and a head moving unit HTU. The support part SUP may include a first support part SUP1 extending in a first direction DR1 as a horizontal direction and a second support part SUP2 connected to the first support part SUP1 and extending in a third direction DR3 as a vertical direction.
The head moving unit HTU may include a head moving part HT placed on the first support part SUP1 and movable in one direction and a head fixing part HF disposed at a lower surface of the head moving part HT and disposed with the printing head unit HU.
The head moving part HT may move in the first direction DR1 on the first support part SUP 1. The head unit HU may be fixed to the head fixing part HF to move in the first direction DR1 together with the head moving part HT.
As shown in fig. 3, the print head unit HU may include a plurality of inkjet heads IH and is disposed on a base frame BF. The print head unit HU can eject a predetermined ink onto the target substrate SUB by using an ink jet head IH connected to another ink storage portion.
The print head unit HU may be spaced apart from the stage STA at a lower portion of the base frame BF. The distance between the printing head unit HU and the stage STA can be adjusted by the height of the second support SUP2 of the base frame BF.
The plurality of inkjet heads IH may be arranged spaced apart from each other in one direction, and may be arranged in one or more columns. It is shown in fig. 3 that the ink jet heads IH are arranged in two columns and the ink jet heads IH of the respective columns are arranged alternately with each other. However, it is not limited thereto, and the inkjet heads IH may be arranged in a greater number of columns, and may also be arranged not to be staggered but to overlap each other. The shape of the inkjet head IH is not particularly limited, but as an example, the inkjet head IH may have a quadrangular shape.
Although six ink-jet heads IH arranged in the print head unit HU are shown in the drawings, this is for schematically illustrating the print head unit HU, and the number of ink-jet heads IH is not limited thereto.
The inkjet head IH disposed in the print head unit HU may eject ink onto the object substrate SUB disposed on the upper portion of the stage STA. According to one embodiment, the print head unit HU may move in the first direction DR1 on the first support SUP1, and the inkjet head IH may move to a specific position and eject ink toward an upper portion of the target substrate SUB.
The print head unit HU may move in a first direction DR1 in which the first support SUP1 extends, and the inkjet head IH may move in the first direction DR1 and eject ink toward an upper portion of the target substrate SUB.
In an exemplary embodiment, the ink may be provided in a solution state or a colloid (colloid) state. For example, the solvent may be acetone, water, ethanol, toluene, propylene Glycol (PG), propylene Glycol Methyl Acetate (PGMA), or the like, but is not limited thereto.
The width of the subject substrate SUB measured in the first direction DR1 according to an embodiment may be greater than the width of the print head unit HU. In this case, the print head unit HU may move in the first direction DR1 and eject ink onto the object substrate SUB over the entire surface.
According to one embodiment, as shown in fig. 4, each of the plurality of inkjet heads IH may include a plurality of nozzles NZ. The ink can be ejected onto the target substrate SUB through the plurality of nozzles NZ. The inkjet head IH may discharge ink through a plurality of nozzles NZ. The ink discharged from the nozzle NZ may be ejected onto the subject substrate SUB disposed on the stage STA or the SUB-stage SSTA. The plurality of nozzles NZ may be located on a bottom surface of the inkjet head IH and aligned along a direction in which the inkjet head IH extends.
When the stage STA moves in the second direction DR2 so as to be located at the lower portion of the base frame BF, the print head unit HU may move between the first track RL1 and the second track RL2 and eject ink through the inkjet head IH. The operation of such an inkjet head IH is not limited thereto, and various modifications may be made within a range in which the operation can be achieved. A detailed description of the operation of the inkjet head IH will be omitted.
The stage STA may include a plate-shaped portion that can fix the object substrate SUB and tracks RL1, RL2 that can move the portion. The stage STA may include two tracks RL1, RL2, and may move the object substrate SUB in the second direction DR2 using the tracks RL1, RL2. The target substrate SUB is an object of inkjet printing, and a predetermined layer is formed by ejecting ink onto the entire upper surface of the target substrate SUB while moving the position of the target substrate SUB by the stage STA. For example, an organic light emitting layer may be formed on the subject substrate SUB.
In addition, although the present specification illustrates an embodiment in which the print head unit HU moves in the first direction DR1 and the stage STA moves in the second direction DR2 to adjust the position at which the ink discharged from the inkjet head IH is supplied, it is not limited thereto. That is, the head unit HU may move in the first and second directions DR1 and DR2 to adjust the position of ink discharge, or the stage STA may move in the first and second directions DR1 and DR2 to adjust the position of ink discharge.
The SUB-station SSTA may provide a space in which the subject substrate SUB is arranged. Further, a substrate alignment unit AL may be disposed on the sub-table SSTA. The shape of the sub-station SSTA is not particularly limited, but as an example, the sub-station SSTA may have a quadrangular shape in which two sides extend in the first direction DR1 and the second direction DR2 as shown in the drawing. The sub-station SSTA may include a long side extending in the first direction DR1 and a short side extending in the second direction DR 2. However, the planar shape of the entire SUB-stage SSTA may be different depending on the shape of the target substrate SUB on the plane. For example, in the case where the target substrate SUB is rectangular in plane, the shape of the SUB-stage SSTA may be rectangular as shown in the drawing, and in the case where the target substrate SUB has a circular plane, the shape of the SUB-stage SSTA in plane may also be circular. Although the present specification shows an embodiment in which the subject substrate SUB is disposed on the SUB-station SSTA, it is not limited thereto, and the SUB-station SSTA may be omitted so that the subject substrate SUB may be directly located on the station STA.
The substrate alignment unit AL may be disposed on the sub-table SSTA. The substrate alignment units AL may be disposed on respective sides of the SUB-table SSTA, and a region surrounded by the plurality of substrate alignment units AL may be a region where the subject substrate SUB is disposed.
Hereinafter, an inkjet printing method according to an embodiment is described with reference to fig. 5 to 6. Fig. 5 is a flowchart regarding an inkjet printing method according to an embodiment, and fig. 6 is a schematic diagram regarding a display panel manufacturing method using the aforementioned inkjet printing apparatus and inkjet printing method according to an embodiment. Since the aforementioned inkjet printing apparatus is used, a description of a repetitive configuration will be omitted.
As shown in fig. 5, first, a plurality of target substrates SUB are mounted on the stage STA or the SUB-stage SSTA (S100). A plurality of object substrates SUB may be disposed on the stage STA or the SUB-stage SSTA.
During the inkjet printing process, the stage STA or the inkjet head IH may move along the second direction DR2, but is not limited thereto, and the moving direction of the stage STA or the inkjet head IH may be variously changed.
Next, the head unit HU is positioned on the target substrate SUB (S200), and ink is discharged onto the target substrate SUB (S300). At this time, the print head unit HU may be located on one side edge of the target substrate SUB arranged in the first row. The head unit HU may discharge ink while moving in the second direction DR2 from one side edge.
An inkjet printing method using a target substrate according to an embodiment is explained below with reference to fig. 6.
As shown in the right side of fig. 6, the object substrate SUB according to an embodiment may include a plurality of panel areas PA1, PA2, PA3. The plurality of panel areas PA1, PA2, PA3 may be arranged in a state where a part of the panel areas PA1, PA2, PA3 is shifted along the first direction DR 1. Specifically, the edges of the panel areas PA2 arranged in the second row may be arranged to be shifted by a second distance d2 along the first direction DR1 with reference to the edges of the panel areas PA1 arranged in the first row. Further, the edges of the panel areas PA3 arranged in the third row may be arranged to be shifted by a second distance d2 along the first direction DR1, with reference to the edges of the panel areas PA2 arranged in the second row. Although the present specification shows an embodiment in which the panel areas PA2, PA3 arranged in each of the second and third rows are arranged in a shifted state with respect to the panel area PA1 arranged in the first row, it is not limited thereto, and may be shifted in various forms.
The inkjet heads IH disposed on the object substrate SUB may discharge ink in the second direction DR 2. The description will be made with reference to the process of moving once along the second direction DR 2.
In the process of discharging ink to the panel area PA1 disposed in the nth row, the inkjet head IH may use a portion of the plurality of nozzles NZ. Specifically, the first nozzle group NZ1 overlapping each pixel area PX1 may be used.
Then, in the process of discharging ink to the panel area PA2 disposed in the n +1 th row, the inkjet head IH may use a part of the plurality of nozzles NZ. Specifically, the second nozzle group NZ2 overlapping each pixel area PX2 may be used.
Next, in a process of discharging ink to the panel area PA3 arranged in the n +2 th row, the inkjet head IH may use a part of the plurality of nozzles NZ. Specifically, the third nozzle group NZ3 overlapping each pixel area PX3 may be used.
Each of the first, second, and third nozzle groups NZ1, NZ2, and NZ3 may include nozzles different from one another. However, without being limited thereto, the following embodiments are also possible: at least a part of the first and second nozzle groups NZ1 and NZ2 includes the same nozzles or at least a part of the second and third nozzle groups NZ2 and NZ3 includes the same nozzles. The first nozzle group NZ1, the second nozzle group NZ2, and the third nozzle group NZ3 may be alternately and repeatedly arranged.
Accordingly, according to one embodiment, in a process in which the inkjet head IH moves once in the second direction DR2, the first, second, and third nozzle groups NZ1, NZ2, and NZ3 may be used. The number of nozzles included in the first, second, and third nozzle groups NZ1, NZ2, and NZ3 may be 50% or more of the number of nozzles included in one inkjet head.
In the process in which the inkjet head IH moves once in the second direction DR2, the number of nozzles for discharging ink may be increased. As the number of nozzles to be used in the plurality of nozzles increases, the discharge stability of the ink can be improved.
Hereinafter, an inkjet printing method according to a comparative example will be described with reference to fig. 7. Fig. 7 is a schematic view regarding a display panel manufacturing method using an inkjet printing method according to a comparative example.
According to a comparative example, the object substrate SUB mounted on the stage may be arranged such that one edges of the plurality of panel areas PA are aligned. Accordingly, in the process in which the inkjet head IH moves once in the second direction DR2, only the first nozzle group NZ1 may be used. Nozzles located between the pixel areas are not used at all. Accordingly, the number of nozzles that discharge ink can be significantly smaller than in the embodiment.
Accordingly, the number of nozzles used in the inkjet printing process is limited, and nozzles that are not used for a long time may cause pixel defects due to phenomena such as ink non-discharge or abnormal discharge in a process in which the nozzles should be used.
Although the embodiments of the present invention have been described in detail, the scope of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concept of the present invention defined in the appended claims also belong to the scope of the present invention.

Claims (20)

1. An object substrate for an inkjet printing process, comprising:
a plurality of panel areas arranged in a matrix form,
wherein at least a portion of the plurality of panel regions are displaced along a first direction.
2. The object substrate for an inkjet printing process according to claim 1, wherein each of the plurality of panel regions includes a plurality of pixel regions,
wherein a distance between two adjacent pixel regions along the first direction among the plurality of pixel regions is a first distance.
3. The object substrate for an inkjet printing process according to claim 2, wherein the first distance is 0.2mm to 0.3mm.
4. The object substrate for an inkjet printing process according to claim 2, wherein a distance between edges of panel regions adjacent along a second direction perpendicular to the first direction among the plurality of panel regions is a second distance.
5. The object substrate for an inkjet printing process according to claim 4, wherein the second distance is 0.1mm to 0.15mm.
6. An inkjet printing method comprising:
loading the target substrate on the stage;
a step of disposing an ink jet head on the object substrate; and
a step of discharging ink onto the target substrate,
wherein the object substrate includes:
a plurality of panel regions arranged in a matrix form,
wherein at least a portion of the plurality of panel regions are displaced along a first direction.
7. The inkjet printing method according to claim 6, wherein the inkjet head moves in a second direction perpendicular to the first direction.
8. The inkjet printing method according to claim 6, wherein the inkjet head includes a plurality of nozzles,
wherein the plurality of nozzles comprises:
a first nozzle group that discharges ink to a panel region arranged in an nth row among the plurality of panel regions; and
and a second nozzle group discharging ink to a panel region arranged in an n +1 th row among the plurality of panel regions.
9. The inkjet printing method according to claim 8, wherein the first nozzle group and the second nozzle group include one or more nozzles different from each other.
10. The inkjet printing method according to claim 8, wherein the plurality of nozzles further include a third nozzle group that discharges ink to a panel region arranged in an n +2 th row among the plurality of panel regions.
11. The inkjet printing method according to claim 10, wherein the third nozzle group includes one or more nozzles different from the nozzles used by the first nozzle group and the second nozzle group.
12. The inkjet printing method according to claim 10, wherein the first nozzle group, the second nozzle group, and the third nozzle group are alternately arranged.
13. The inkjet printing method according to claim 6, wherein the inkjet head includes a plurality of nozzles, and
in the process of moving the inkjet head once in a second direction perpendicular to the first direction and discharging ink, 50% or more of the plurality of nozzles are used.
14. The inkjet printing method according to claim 6, wherein each of the plurality of panel regions includes a plurality of pixel regions, and
a distance between two adjacent pixel regions in the plurality of pixel regions along the first direction is a first distance.
15. The inkjet printing method according to claim 14, wherein the first distance is 0.2mm to 0.3mm.
16. The inkjet printing method according to claim 14, wherein a distance between edges of panel areas adjacent along a second direction perpendicular to the first direction among the plurality of panel areas is a second distance.
17. The inkjet printing method according to claim 16, wherein the second distance is 0.1mm to 0.15mm.
18. The inkjet printing method according to claim 6, wherein each of the plurality of panel regions includes a plurality of pixel regions,
a distance between two adjacent pixel regions in the first direction among the plurality of pixel regions is a first distance,
the plurality of panel regions are displaced at least a second distance along the first direction, an
The second distance is less than the first distance.
19. The inkjet printing method according to claim 18, wherein the panel area arranged in the n +1 th row among the plurality of panel areas is shifted by at least the second distance along the first direction with reference to an edge of the panel area arranged in the n-th row among the plurality of panel areas.
20. The inkjet printing method according to claim 19, wherein the panel areas of the plurality of panel areas arranged in the n +2 th row are shifted by at least the second distance in the first direction with reference to edges of the panel areas of the plurality of panel areas arranged in the n +1 th row.
CN202210853774.3A 2021-07-13 2022-07-12 Target substrate for inkjet printing process and inkjet printing method using the target substrate Pending CN115610129A (en)

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KR1020210091476A KR20230011526A (en) 2021-07-13 2021-07-13 Substrate for inkjet priting process and inkjet printing method using the substrate

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