KR20210114095A - Apparatus for cleaning a blade, method for cleaning a blade, and apparatus for manufacturing a display device - Google Patents

Abstract

The present invention relates to a cleaning device of a blade for preventing recontamination of an inkjet head due to ink remaining on a blade and preventing a scratch on the blade, a cleaning method of a blade, and a manufacturing device of a display device. The cleaning device of a blade comprises: a cleaning medium; a supply unit supplying the cleaning medium to the blade; and recovery units disposed to be spaced from each other while having the supply unit and the blade therebetween and recovering the cleaning medium coming in contact with the blade. The cleaning medium is unwound to the supply unit to be supplied to the recovery unit.

Description

A blade cleaning apparatus, a blade cleaning method, and an apparatus for manufacturing a display device TECHNICAL FIELD

The present invention relates to an apparatus and method, and more particularly, to an apparatus for cleaning a blade, a method for cleaning a blade, and an apparatus for manufacturing a display device.

An inkjet printing apparatus is an apparatus for printing a predetermined image by discharging fine droplets of ink to a desired position on a printing medium. In recent years, such inkjet printing apparatus has been applied to a flat panel display field such as a liquid crystal display (LCD), an organic light emitting device (OLED), etc., a flexible display field such as an electronic paper (E-paper), metal wiring, etc. The scope of application is expanding to various fields such as printed electronics and organic thin film transistors (OTFTs).

However, foreign substances such as ink ejected from a plurality of nozzles or surrounding dust are attached to the surface of the inkjet head. In this case, as the ink solidifies, the nozzle may be blocked or a foreign substance may block the nozzle, so that the ink may not be discharged or the discharge direction of the ink may be shifted, and thus print quality may be deteriorated.

Therefore, in general, the ink or foreign matter around the nozzle is removed by cleaning the surface of the inkjet head through the blade periodically during or after the printing operation.

As such, it is also important to clean the blade for cleaning the surface of the inkjet head related to the print quality, and research on cleaning the blade to minimize foreign substances present on the blade is being actively conducted.

However, in the conventional blade cleaning apparatus, blade cleaning method, and display apparatus manufacturing apparatus, there is a problem in that the inkjet head is re-contaminated and scratched by residual ink present on the blade.

The present invention is intended to solve various problems including the above problems, and a blade cleaning apparatus, blade cleaning method and display for preventing recontamination and scratching of an inkjet head by residual ink present on the blade An object of the present invention is to provide an apparatus for manufacturing an apparatus. However, these problems are exemplary, and the scope of the present invention is not limited thereto.

According to one aspect of the present invention, a cleaning medium; a supply unit for supplying the cleaning medium to the blade; and a recovery unit arranged to be spaced apart with the supply unit and the blade interposed therebetween and configured to recover the cleaning medium in contact with the blade, wherein the cleaning medium is unwound from the supply unit and supplied to the recovery unit, the blade A cleaning device is provided.

According to this embodiment, the width of the cleaning medium in the first direction and the width of the supply unit and the recovery unit in the first direction may be the same.

According to the present embodiment, it may further include a cleaning liquid discharge unit disposed between the supply unit and the blade and spraying the cleaning liquid onto the cleaning medium.

According to this embodiment, disposed between the supply unit and the blade, a first guide roller; and a second guide roller disposed between the blade and the recovery unit.

According to this embodiment, the rotation center of the first guide roller and the rotation center of the second guide roller may be closer to the blade than the rotation center of the supply unit.

According to this embodiment, the interval between the rotation center of the first guide roller and the rotation center of the second guide roller may be greater than the width of the blade.

According to this embodiment, the width of the cleaning medium in the first direction may be greater than the width of the blade in the first direction.

According to this embodiment, the blade includes a first portion, a second portion facing the first portion, and a third portion connecting the first portion and the second portion, and the cleaning medium is the cleaning medium of the blade. The first part, the second part, and the third part may be in contact.

According to this embodiment, the first part and the second part may correspond to side surfaces of the blade, and the third part may be a part in which the blade cleans the discharge part of the inkjet head.

According to this embodiment, it is disposed between the supply unit and the recovery unit, further comprising a cleaning medium cleaning unit for cleaning the cleaning medium, wherein the cleaning medium is transferred from the recovery unit through the cleaning medium cleaning unit to the supply unit. can lead

According to this embodiment, the first roller disposed between the supply unit and the cleaning medium cleaning unit; and a second roller disposed between the cleaning medium cleaning unit and the collecting unit.

According to this embodiment, the rotation center of the first roller and the rotation center of the second roller may be closer to the cleaning medium cleaning unit than the rotation center of the supply unit.

According to this embodiment, the distance from the blade to the rotation center of the supply unit may be the same as the distance from the blade to the rotation center of the recovery unit.

According to another aspect of the present invention, there is provided a method comprising: contacting a cleaning medium with a first portion of a blade, a second portion opposite the first portion, and a third portion connecting the first portion and the second portion; spraying a cleaning solution onto the cleaning medium; moving the cleaning medium and cleaning the blade; and drying the blade using the cleaning medium that does not contain the cleaning solution.

According to this embodiment, the cleaning of the blade and the drying of the blade may cause the cleaning medium to vibrate in a first direction and rub against the blade.

According to this embodiment, the method may further include cleaning the cleaning medium.

According to this embodiment, the method may further include cleaning the recontaminated blade using the cleaned cleaning medium.

According to another aspect of the present invention, an inkjet head; a blade for cleaning the ejection part of the inkjet head; a supply unit on which a cleaning medium for cleaning the blade is wound, and for supplying the cleaning medium; and a recovery unit for winding the cleaning medium supplied from the supply unit, wherein the blade contacts the cleaning medium after cleaning the inkjet head.

According to the present embodiment, it may further include a cleaning liquid discharge unit disposed between the supply unit and the blade and spraying the cleaning liquid onto the cleaning medium.

According to this embodiment, disposed between the supply unit and the blade, a first guide roller; and a second guide roller disposed between the blade and the recovery unit, wherein the rotation center of the first guide roller and the rotation center of the second guide roller are closer to the blade than the rotation center of the supply unit. can

Other aspects, features and advantages other than those described above will become apparent from the following detailed description, claims and drawings for carrying out the invention.

According to an embodiment of the present invention made as described above, a blade cleaning apparatus, a blade cleaning method, and an apparatus for manufacturing a display device for preventing recontamination and scratching of the inkjet head by residual ink present on the blade can be implemented. Of course, the scope of the present invention is not limited by these effects.

1 is a perspective view schematically illustrating an apparatus for manufacturing a display device according to an exemplary embodiment.
2 is a perspective view schematically illustrating an apparatus for cleaning a blade according to an embodiment of the present invention.
3A is a front view schematically illustrating a blade cleaning apparatus according to an embodiment of the present invention.
3B is a front view schematically illustrating an apparatus for cleaning a blade according to an embodiment of the present invention.
4 is a perspective view schematically illustrating an apparatus for cleaning a blade according to an embodiment of the present invention.
5A is a front view schematically illustrating an apparatus for cleaning a blade according to an embodiment of the present invention.
5B is a front view schematically illustrating a blade cleaning apparatus according to an embodiment of the present invention.
6A to 6F are front views schematically illustrating a method of cleaning a blade according to an embodiment of the present invention.

Since the present invention can apply various transformations and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail in the detailed description. Effects and features of the present invention, and a method of achieving them, will become apparent with reference to the embodiments described below in detail in conjunction with the drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various forms.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, and when described with reference to the drawings, the same or corresponding components are given the same reference numerals, and the overlapping description thereof will be omitted. .

In the following embodiments, terms such as first, second, etc. are used for the purpose of distinguishing one component from another, not in a limiting sense.

In the following examples, the singular expression includes the plural expression unless the context clearly dictates otherwise.

In the following embodiments, terms such as include or have means that the features or components described in the specification are present, and the possibility of adding one or more other features or components is not excluded in advance.

In the following embodiments, when it is said that a part such as a film, region, or component is on or on another part, it is not only when it is directly on the other part, but also another film, region, component, etc. is interposed therebetween. Including cases where there is

In the drawings, the size of the components may be exaggerated or reduced for convenience of description. For example, since the size and thickness of each component shown in the drawings are arbitrarily indicated for convenience of description, the present invention is not necessarily limited to the illustrated bar.

Where certain embodiments are otherwise feasible, a specific process sequence may be performed different from the described sequence. For example, two processes described in succession may be performed substantially simultaneously, or may be performed in an order opposite to the order described.

As used herein, "A and/or B" refers to A, B, or A and B. And, "at least one of A and B" represents the case of A, B, or A and B.

In the following embodiments, when a film, region, or component is connected, when the film, region, or component is directly connected, or/and in the middle of another film, region, or component Including cases where they are interposed and indirectly connected. For example, in the present specification, when it is said that a film, region, component, etc. are electrically connected, when the film, region, component, etc. are directly electrically connected, and/or another film, region, component, etc. is interposed therebetween. to indicate an indirect electrical connection.

The x-axis, y-axis, and z-axis are not limited to three axes on a Cartesian coordinate system, and may be interpreted in a broad sense including them. For example, the x-axis, y-axis, and z-axis may be orthogonal to each other, but may refer to different directions that are not orthogonal to each other.

1 is a perspective view schematically illustrating an apparatus for manufacturing a display device according to an exemplary embodiment.

Referring to FIG. 1 , an apparatus 1 for manufacturing a display device may include an inkjet printing unit 10 , an inkjet head cleaning unit 20 , and a blade cleaning apparatus 30 .

The inkjet printing unit 10 may include an inkjet head (IH), and the inkjet head cleaning unit 20 may include a blade (B), a blade fixing unit (F), and a collecting unit (C). Also, the blade cleaning device 30 may include a supply unit 100a, a recovery unit 100b, and a cleaning medium 200 .

The inkjet head IH may discharge the ink Ink so that the ink Ink falls on the display substrate D. The inkjet head IH can move in the y direction through the first moving part M1 and the second moving part M2, and can drop ink on the front surface of the display substrate D while moving in the y direction. have.

1 shows that the inkjet head IH moves through the first moving part M1 and the second moving part M2, but the inkjet head IH can move through one moving part, and differently there are three It can move through the above moving parts.

The inkjet head IH includes a discharge unit OL, and the ink Ink supplied through the discharge unit OL of the inkjet head IH may include a quantum dot material. The core of the quantum dot may be selected from a group II-VI compound, a group III-V compound, a group IV-VI compound, a group IV element, a group IV compound, and combinations thereof. A quantum dot can control the color of light emitted according to a particle size, and accordingly, the quantum dot can have various emission colors such as blue, red, and green.

The blade B may clean the ejection portion OL of the inkjet head IH from which the ink Ink is ejected. The blade B is fixed to the blade fixing part F, and may move in the x-direction through the third moving part M3 connected to the blade fixing part F. In FIG. 1 , the blade B is shown to move through one moving part, but there may be a plurality of moving parts.

The blade (B) is made of rubber such as silicone, natural rubber, silicone rubber, acrylic rubber, polyethylene rubber, PV (polyvinyl: polyvinyl), and EPDM (Ethylene Propylene Diene Monomer). It may be a material. Also, the blade B may include a polymer such as polyester, polyethylene, or polyoxymethylene.

The collection unit C includes a cleaning liquid used when cleaning the discharge unit OL of the inkjet head IH through the blade B and the remaining ink Ink attached to the discharge unit OL of the inkjet head IH. etc can be collected.

The supply unit 100a is wound with a cleaning medium 200 for cleaning the blade B, and may supply the cleaning medium 200 .

The recovery unit 100b may recover the cleaning medium 200 supplied from the supply unit 100a by winding it.

The cleaning medium 200 may be in contact with the blade (B) to clean at least one surface of the blade (B). The cleaning medium 200 may be a sponge material such as poly-vinyl alcohol (PVA), poly-vinyl fluoride (PVF), and high elastic foam. In addition, the cleaning medium 200 may be a fiber material such as cotton fiber, hemp fiber, wool fiber, polyamide (polyamide), polyester (polyester), polyurethane (polyurethane).

In FIG. 1 , the first moving part M1, the second moving part M2, and the third moving part M3 are shown to cross each other, but the first moving part M1 and the second moving part M2 and the The three moving parts M3 may be parallel.

In addition, in FIG. 1, the blade (B) is shown as moving through the blade fixing part (F) and the third moving part (M3), but the blade (B) is fixed in a state in which it overlaps with the collecting part (C) and disposed. can be and the collection unit (C) can be moved.

On the other hand, looking at the method of manufacturing the display device through the display device manufacturing apparatus 1 as described above, the display substrate D may be manufactured and prepared.

The inkjet head IH may be disposed to partially overlap the display substrate D. The inkjet head IH disposed on the display substrate D may drop the ink Ink onto the display substrate D by discharging the ink Ink.

The inkjet head IH can move in the y-direction through the first moving part M1 and the second moving part M2, and while moving in the y-direction, it is possible to drop the ink Ink on the front surface of the display substrate D. can

The display substrate D on which the ink Ink has been ejected can move through the fourth moving part M4, and the new display substrate D on which the ink Ink is not ejected is partially connected to the inkjet head IH. They may be arranged to overlap.

The inkjet head IH dropped by discharging ink on the front surface of the display substrate D may be disposed to partially overlap the collection unit C by moving in the y-direction.

The blade B may move in the x-direction through the blade fixing unit F and the third moving unit M3 and may be disposed to partially overlap the inkjet head IH.

The blade B may rotate clockwise or counterclockwise about the third moving part M3 as a central axis, and a part AR of the rotated blade B is the discharge part OL of the inkjet head IH. ) can be in contact with

The blade B may be rotated after being disposed to partially overlap the inkjet head IH. As another example, the third moving part M3 may be partially overlapped with the inkjet head IH after the blade B rotates first. can be moved through

After the part AR of the blade B comes into contact with the discharge part OL of the inkjet head IH, the inkjet head IH moves y by the first moving part M1 and the second moving part M2. direction or the blade B may vibrate in the y direction. That is, the discharge portion OL of the inkjet head IH may be cleaned through the blade B.

When cleaning the inkjet head IH, the cleaning liquid may be sprayed, and the remaining ink Ink, etc. existing in the discharge portion OL of the inkjet head IH may be removed while rubbing using the blade B.

The cleaning liquid used for cleaning the inkjet head IH and the remaining ink Ink may be collected in the collection unit C disposed under the inkjet head IH.

The blade B, which has cleaned the inkjet head IH, moves to partially overlap the cleaning device 30 of the blade through the third moving part M3, and a part AR of the blade B moves to the cleaning device of the blade. It can be rotated to face (30).

As another example, after the blade B rotates first, it may move through the third moving part M3 so as to partially overlap with the cleaning device 30 of the blade.

The cleaning device 30 of the blade may move in the z-direction so as to be in contact with the blade B. That is, the cleaning device 30 of the blade may move in the z direction, and the cleaning medium 200 of the cleaning device 30 of the blade may come into contact with a portion AR of the blade B.

After the part AR of the blade B comes into contact with the cleaning medium 200 , the supply part 100a of the cleaning device 30 of the blade may supply the cleaning medium 200 , and in contact with the blade B The collecting unit 100b may wind up the cleaning medium 200 on which foreign substances are attached. This will be described in detail with reference to FIGS. 2, 3A, and 3B.

2 is a perspective view schematically illustrating a blade cleaning apparatus according to an embodiment of the present invention, and FIG. 3A is a front view schematically illustrating a blade cleaning apparatus according to an embodiment of the present invention. Specifically, FIG. 3A is a front view of the cleaning apparatus of the blade shown in FIG. 2 as viewed from the I direction.

Referring to FIGS. 2 and 3A , the blade cleaning device 30 may include a supply unit 100a , a recovery unit 100b , a cleaning medium 200 , and a cleaning liquid discharge unit 300 .

The supply unit 100a winds the cleaning medium 200 for cleaning the blade B, and may supply the cleaning medium 200 to the blade B.

The recovery unit 100b may be disposed to be spaced apart from the supply unit 100a and the blade B therebetween, and may recover the cleaning medium 200 in contact with the blade B.

The supply part 100a and the recovery part 100b may be made of a hardened alloy or a cemented carbide metal material, a urethane material, a steel material, or the like.

As shown in FIG. 2 , the supply unit 100a and the recovery unit 100b may have a cylindrical shape, and the supply unit 100a and the recovery unit 100b have the rotation center (ℓ) and recovery of the supply unit 100a, respectively. It can rotate clockwise or counterclockwise based on the rotation center (ℓ') of the part 100b.

The cleaning medium 200 may be unwound from the supply unit 100a and supplied to the recovery unit 100b, and may clean at least one surface of the blade B while in contact with the blade B.

For example, the cleaning medium 200 may be made of a sponge material such as poly-vinyl alcohol (PVA), poly-vinyl fluoride (PVF), and high elastic foam.

Also, as another example, the cleaning medium 200 may be a fiber material such as cotton fiber, hemp fiber, wool fiber, polyamide, polyester, polyurethane, or the like.

The cleaning liquid discharge unit 300 is disposed between the supply unit 100a and the blade B, and may spray the cleaning liquid onto the cleaning medium 200 . The cleaning liquid sprayed from the cleaning liquid discharge unit 300 may be alcohol, thinner, or the like.

2 and 3A, the cleaning solution discharge unit 300 is shown to be disposed adjacent to the blade (B), but the cleaning solution discharge unit 300 may be disposed anywhere between the supply unit 100a and the blade (B). For example, it may be disposed adjacent to the supply unit 100a.

In one embodiment, the width w1 of the cleaning medium 200 in the first direction (eg, the x direction) and the width w2 of the supply unit 100a in the first direction may be the same. In addition, the width w1 of the cleaning medium 200 in the first direction and the width w3 of the recovery unit 100b in the first direction may be the same.

As shown in FIG. 2 , in one embodiment, the width w1 of the cleaning medium 200 in the first direction (eg, the x direction) is the width w3 of the blade B in the first direction. ) can be greater than

In FIG. 2, the width w1 in the first direction (eg, the x direction) of the cleaning medium 200 is shown to be larger than the width w3 in the first direction of the blade B, but the cleaning medium ( The width w1 of the first direction 200 may be the same as the width w3 of the blade B in the first direction.

In one embodiment, the blade (B) is a first portion (AR1), a second portion (AR2) opposite to the first portion (AR1), and connecting the first portion (AR1) and the second portion (AR2) A third portion AR3 may be included. At this time, the cleaning medium 200 may be in contact with at least one of the first portion AR1 , the second portion AR2 , and the third portion AR3 of the blade B .

As shown in FIG. 3A , the cleaning medium 200 may be in contact with the third part AR3 of the blade B, and the third part AR3 of the blade B is the inkjet head IH (refer to FIG. 1 ). It may be a part in which the discharge part OL (refer to FIG. 1 ) is cleaned.

3A shows that the third portion AR3 of the blade B is bent, but the third portion AR3 of the blade B is not bent and the shape of the blade B as viewed from the front may be a rectangle. . That is, the third portion AR3 of the blade B may be variously changed to a polygonal shape such as a circle, an ellipse, or a square, a diamond shape, or the like.

In addition, although the width w5 in the second direction (eg, y direction) of the blade B is shown to be constant in FIG. 3A , it becomes narrower or wider in the third direction (eg, the z direction). can get

In one embodiment, the distance (d1) from the rotation center (ℓ'') of the blade fixing unit (F) to the rotation center (ℓ) of the supply unit 100a is the rotation center (ℓ') of the blade fixing unit (F) ') to the center of rotation (ℓ') of the recovery unit 100b (d2) may be the same.

The blade cleaning apparatus 30 according to an embodiment of the present invention may include a supply part 100a, a recovery part 100b, a cleaning medium 200 and a cleaning liquid discharge part 300, and a supply part 100a and The recovery unit 100b may rotate clockwise or counterclockwise with respect to the rotation center ℓ of the supply unit 100a and the rotation center ℓ′ of the recovery unit 100b, respectively.

As the supply unit 100a and the recovery unit 100b rotate clockwise or counterclockwise, a portion of the cleaning medium 200 in contact with the third part AR3 of the blade B vibrates in the y direction while the blade ( The third part AR3 of B) may be cleaned.

In this case, the remaining ink Ink, etc. attached to the third part AR3 which is the tip of the blade B after cleaning the inkjet head IH may be removed through the cleaning device 30 of the blade, and then The discharge part OL of the inkjet head IH contaminated again may be cleaned using the cleaned blade B. At this time, since the remaining ink Ink does not exist in the third portion AR3 that is the end of the blade B in contact with the discharge portion OL of the inkjet head IH, the discharge portion of the inkjet head IH (OL) During cleaning, contamination and scratches may not be caused by the blade (B).

In addition, the cleaning medium 200 of the cleaning apparatus 30 of the blade according to an embodiment of the present invention may be unwound from the supply unit 100a, come into contact with the blade B, and then wound up to the recovery unit 100b.

In this case, since the cleaning medium 200 that has cleaned the blade B is recovered by the recovery unit 100b, re-contamination of the blade B through the cleaning medium 200 with the remaining ink Ink does not occur. may not be

3B is a front view schematically illustrating an apparatus for cleaning a blade according to an embodiment of the present invention. FIG. 3B is a bar corresponding to some modified embodiments of FIG. 3B, and will be described below focusing on the differences.

Referring to FIG. 3B , the blade cleaning apparatus 30 according to an embodiment of the present invention includes a cleaning medium cleaning unit 400 for cleaning the cleaning medium 200 , a first roller R1 and a second roller R2 . ) may be included.

The cleaning medium cleaning unit 400 is disposed between the supply unit 100a and the recovery unit 100b, and comes in contact with the blade B to clean the contaminated cleaning medium 200 on which the residual ink Ink is attached. .

The first roller R1 may be disposed between the supply unit 100a and the cleaning medium cleaning unit 400 , and the second roller R2 may be disposed between the cleaning medium cleaning unit 400 and the collecting unit 100b. can

The first roller R1 and the second roller R2 may be made of a hardened alloy or cemented carbide metal material, a urethane material, a steel material, or the like.

As shown in Fig. 3b, the rotation center (r) of the first roller (R1) and the rotation center (r') of the second roller (R2) are the cleaning medium cleaning unit (l) than the rotation center (ℓ) of the supply unit 100a 400) may be close.

The cleaning medium 200 of the blade cleaning apparatus 30 according to an embodiment of the present invention may be continued from the recovery unit 100b through the cleaning medium cleaning unit 400 to the supply unit 100a.

In this case, the remaining ink Ink, etc. attached to the third part AR3 which is the tip of the blade B after cleaning the inkjet head IH may be removed through the cleaning device 30 of the blade, and then The discharge part OL of the inkjet head IH contaminated again may be cleaned using the cleaned blade B.

At this time, since the remaining ink Ink does not exist in the third portion AR3 that is the end of the blade B in contact with the discharge portion OL of the inkjet head IH, the discharge portion of the inkjet head IH (OL) During cleaning, contamination and scratches may not be caused by the blade (B).

In addition, since the cleaning medium 200 that has cleaned the blade B is cleaned through the cleaning medium cleaning unit 400 , recontamination of the blade B may not occur when the blade B is cleaned again.

4 is a perspective view schematically illustrating a blade cleaning apparatus according to an embodiment of the present invention, and FIG. 5A is a front view schematically illustrating a blade cleaning apparatus according to an embodiment of the present invention. Specifically, FIG. 5A is a front view of the cleaning apparatus of the blade shown in FIG. 4 as viewed from the II direction. In FIGS. 4 and 5A , the same reference numerals as those of FIGS. 2 and 3A refer to the same members, and repeated descriptions thereof will be omitted.

4 and 5A, the blade cleaning device 30 includes a supply unit 100a, a recovery unit 100b, a first guide roller GR1, a second guide roller GR2, a cleaning medium 200 and A cleaning solution discharging unit 300 may be included.

The supply unit 100a winds the cleaning medium 200 for cleaning the blade B, and may supply the cleaning medium 200 to the blade B. In addition, the recovery unit 100b may be disposed to be spaced apart from the supply unit 100a and the blade B therebetween, and the cleaning medium 200 in contact with the blade B may be recovered.

The first guide roller GR1 may be disposed between the supply unit 100a and the blade B, and the second guide roller GR2 may be disposed between the blade B and the recovery unit 100b.

The first guide roller GR1 and the second guide roller GR2 may be made of a hardened alloy or a cemented carbide metal material, a urethane material, a steel material, or the like.

As shown in FIG. 5A, in one embodiment, the rotation center r'' of the first guide roller GR1 and the rotation center r''' of the second guide roller GR2 are the supply unit 100a. It may be closer to the blade (B) than the rotation center (ℓ) of the.

In addition, the interval w6 between the rotation center r'' of the first guide roller GR1 and the rotation center r''' of the second guide roller GR2 is the width w5 of the blade B can be larger

In FIGS. 4 and 5A, the cleaning solution discharge unit 300 is shown to be disposed adjacent to the blade B, but the cleaning solution discharge unit 300 may be disposed anywhere between the supply unit 100a and the blade B. For example, it may be disposed adjacent to the supply unit 100a.

In one embodiment, the width w1 of the cleaning medium 200 in the first direction (eg, the x direction) and the width w2 of the supply unit 100a in the first direction may be the same. In addition, the width w1 of the cleaning medium 200 in the first direction and the width w3 of the recovery unit 100b in the first direction may be the same.

In FIG. 4 , the width w1 in the first direction (eg, the x direction) of the cleaning medium 200 is shown to be greater than the width w3 in the first direction of the blade B, but the cleaning medium ( The width w1 of the first direction 200 may be the same as the width w3 of the blade B in the first direction.

In one embodiment, the blade (B) is a first portion (AR1), a second portion (AR2) opposite to the first portion (AR1), and connecting the first portion (AR1) and the second portion (AR2) A third portion AR3 may be included. At this time, the cleaning medium 200 may be in contact with at least one of the first portion AR1 , the second portion AR2 , and the third portion AR3 of the blade B .

As shown in FIG. 5A , the cleaning medium 200 may contact all of the first portion AR1 , the second portion AR2 , and the third portion AR3 of the blade B . At this time, the first portion AR1 and the second portion AR2 of the blade B correspond to the side surface of the blade B, and the third portion AR3 of the blade B is the inkjet head IH, FIG. 1) of the discharge part OL (refer to FIG. 1 ) may be cleaned.

In FIG. 5A , the third portion AR3 of the blade B is bent, but the third portion AR3 of the blade B is not bent and the shape of the blade B viewed from the front may be a rectangle. . That is, the third portion AR3 of the blade B may be variously changed to a polygonal shape such as a circle, an ellipse, or a square, a diamond shape, or the like.

In addition, although the width w5 in the second direction (eg, y direction) of the blade B is shown to be constant in FIG. 5A , it becomes narrower or wider in the third direction (eg, the z direction). can get

In one embodiment, the distance (d1) from the rotation center (ℓ '') of the blade fixing part (F) to the rotation center (ℓ) of the supply part 100a is the rotation center (ℓ') of the blade fixing part (F) The distance d2 from ') to the rotation center (ℓ') of the recovery unit 100b may be the same.

The blade cleaning apparatus 30 according to an embodiment of the present invention includes a supply unit 100a, a recovery unit 100b, a first guide roller GR1, a second guide roller GR2, a cleaning medium 200, and a cleaning liquid. The discharge unit 300 may be included, and the supply unit 100a and the recovery unit 100b are clocked based on the rotation center (ℓ) of the supply unit 100a and the rotation center (ℓ') of the recovery unit 100b, respectively. It can be rotated clockwise or counterclockwise.

As the supply unit 100a and the recovery unit 100b rotate clockwise or counterclockwise, a portion of the cleaning medium 200 in contact with the first portion AR1 and the second portion AR2 of the blade B is The first portion AR1 and the second portion AR2 of the blade B may be cleaned while vibrating in the z direction. Similarly, a portion of the cleaning medium 200 in contact with the third portion AR3 of the blade B may vibrate in the y-direction to clean the third portion AR3 of the blade B.

In this case, the third part AR3, which is the end of the blade B, which has cleaned the inkjet head IH through the cleaning device 30 of the blade, the first part AR1 that is both sides of the blade H, and The remaining ink Ink, etc. attached to the second portion AR2 may be simultaneously removed.

The discharge part OL of the inkjet head IH contaminated again may be cleaned using the blade B cleaned through the cleaning device 30 of the blade. At this time, since the remaining ink Ink does not exist in the third portion AR3 that is the end of the blade B in contact with the discharge portion OL of the inkjet head IH, the discharge portion of the inkjet head IH (OL) During cleaning, contamination and scratches may not be caused by the blade (B).

Compared with the cleaning apparatus 30 of the blade shown in FIG. 3A , the first part AR1 , the second part AR2 , and the third part AR3 of the blade B can all be cleaned, so the inkjet head When cleaning the discharge part OL of the (IH), the possibility of contamination and scratches caused by the blade B may be significantly reduced.

In addition, the cleaning medium 200 of the cleaning apparatus 30 of the blade according to an embodiment of the present invention may be unwound from the supply unit 100a, come into contact with the blade B, and then wound up to the recovery unit 100b.

In this case, since the cleaning medium 200 that has cleaned the blade B is recovered by the recovery unit 100b, re-contamination of the blade B through the cleaning medium 200 with the remaining ink Ink does not occur. may not be

5B is a front view schematically illustrating a blade cleaning apparatus according to an embodiment of the present invention. In FIG. 5B , the same reference numerals as those of FIG. 3B refer to the same members, and thus redundant descriptions thereof will be omitted.

Referring to Figure 5b, the blade cleaning apparatus 30 according to an embodiment of the present invention is a cleaning medium cleaning unit 400 for cleaning the cleaning medium 200, the first roller (R1) and the second roller (R2) ) may be included.

The cleaning medium cleaning unit 400 is disposed between the supply unit 100a and the recovery unit 100b, and comes in contact with the blade B to clean the contaminated cleaning medium 200 on which the residual ink Ink is attached. . In addition, the first roller R1 may be disposed between the supply unit 100a and the cleaning medium cleaning unit 400 , and the second roller R2 is disposed between the cleaning medium cleaning unit 400 and the collecting unit 100b . can be placed.

As shown in Fig. 5b, the rotation center (r) of the first roller (R1) and the rotation center (r') of the second roller (R2) are the cleaning medium cleaning unit (l) than the rotation center (ℓ) of the supply unit 100a 400) may be close.

The cleaning medium 200 of the blade cleaning apparatus 30 according to an embodiment of the present invention may be continued from the recovery unit 100b through the cleaning medium cleaning unit 400 to the supply unit 100a.

In this case, the third part AR3, which is the end of the blade B, which has cleaned the inkjet head IH through the cleaning device 30 of the blade, the first part AR1 that is both sides of the blade B, and Residual ink Ink, etc. attached to the second part AR2 may be removed at the same time, and then the discharge part OL of the inkjet head IH contaminated again may be cleaned using the cleaned blade B. .

At this time, since the remaining ink Ink does not exist in the third portion AR3 that is the end of the blade B in contact with the discharge portion OL of the inkjet head IH, the discharge portion of the inkjet head IH (OL) During cleaning, contamination and scratches may not be caused by the blade (B).

Compared with the cleaning device 30 of the blade shown in FIG. 3B , the first part AR1 , the second part AR2 , and the third part AR3 of the blade B can all be cleaned, so the inkjet head When cleaning the discharge part OL of (IH), the possibility of contamination and scratches caused by the blade B may be significantly reduced.

In addition, since the cleaning medium 200 that has cleaned the blade B is cleaned through the cleaning medium cleaning unit 400 , recontamination of the blade B may not occur when the blade B is cleaned again.

6A to 6F are front views schematically illustrating a method of cleaning a blade according to an embodiment of the present invention. In FIGS. 6A to 6F , the same reference numerals as those of FIGS. 4, 5A and 5B refer to the same members, and thus redundant descriptions thereof will be omitted.

Referring to Figure 6a, the blade (B) is fixed by the blade fixing portion (F) and may rotate clockwise or counterclockwise based on the rotation center (ℓ'') of the blade fixing portion (F).

The third part AR3 that is the end of the blade B may come into contact with the discharge part OL of the inkjet head IH, and the inkjet head IH moves in the y direction or the blade B moves in the y direction. The ejection part OL of the inkjet head IH may be cleaned while moving.

The cleaning liquid used while cleaning the discharge unit OL of the inkjet head IH and the remaining ink Ink deposited on the discharge unit OL of the inkjet head IH are collected by a collection unit disposed below the inkjet head IH. (C) Can be gathered apart.

After cleaning the discharge part OL of the inkjet head IH through the blade B, the blade B or the collection part C may move in the x-direction or the y-direction.

Referring to Figure 6b, the blade (B) rotates counterclockwise based on the rotation center (ℓ'') of the blade fixing part (F), so that the third part (AR3) of the blade (B) is a cleaning device of the blade (30) can be arranged to face.

In Figure 6b, the blade (B) is shown to rotate counterclockwise based on the rotation center (ℓ '') of the blade fixing part (F), but the blade (B) is the rotation center (ℓ) of the blade fixing part (F) '') can be rotated clockwise.

Referring to FIG. 6C , the cleaning device 30 of the blade is +z so that the first portion AR1 , the second portion AR2 , and the third portion AR3 of the blade B come into contact with the cleaning medium 200 . direction can be moved.

In FIG. 6c , the cleaning device 30 of the blade is shown to move in the +z direction, but the blade B and the blade fixing part F move in the -z direction to move the first part AR1 of the blade B , the second part AR2 and the third part AR3 may be in contact with the cleaning medium 200 .

Referring to FIG. 6D , the supply unit 100a and the recovery unit 100b are rotated clockwise or counterclockwise based on the rotation center (ℓ) of the supply unit 100a and the rotation center (ℓ′) of the recovery unit 100b, respectively. can be rotated with

As the supply unit 100a and the recovery unit 100b rotate clockwise or counterclockwise, a portion of the cleaning medium 200 in contact with the first portion AR1 and the second portion AR2 of the blade B is The first portion AR1 and the second portion AR2 of the blade B may be cleaned while vibrating in the z direction. Similarly, a portion of the cleaning medium 200 in contact with the third portion AR3 of the blade B may vibrate in the y-direction to clean the third portion AR3 of the blade B.

Referring to FIG. 6E , the cleaning liquid may be sprayed from the cleaning liquid discharge unit 300 disposed between the supply unit 100a and the blade B.

The cleaning liquid sprayed through the cleaning liquid discharge unit 300 may be deposited on the first portion AR1, the second portion AR2, and the third portion AR3 of the blade B through the cleaning medium 200, and the blade Residual ink Ink and the like existing in the first portion AR1 , the second portion AR2 , and the third portion AR3 of (B) may be removed.

The process of FIG. 6d of cleaning the blade B with the dry cleaning medium 200 without spraying the cleaning liquid on the cleaning medium 200 may be omitted, and the cleaning device 30 of the blade and the blade B are in contact The blade B may be cleaned by spraying the cleaning liquid on the cleaning medium 200 immediately after being cleaned.

Referring to FIG. 6F , spraying of the cleaning liquid onto the cleaning medium 200 through the cleaning liquid discharge unit 300 may be stopped. Thereafter, the new cleaning medium 200 unwound and supplied from the supply unit 100a is brought into contact with the first portion AR1 , the second portion AR2 , and the third portion AR3 of the blade B to bring the blade B into contact. ) can be dried.

That is, as the supply part 100a and the recovery part 100b rotate clockwise or counterclockwise, the cleaning medium 200 in contact with the first part AR1 and the second part AR2 of the blade B A portion may dry the first portion AR1 and the second portion AR2 of the blade B while vibrating in the z direction. Similarly, a portion of the cleaning medium 200 in contact with the third portion AR3 of the blade B may vibrate in the y-direction to dry the third portion AR3 of the blade B.

As another example, when the blade B is cleaned through the cleaning device 30 of the blade shown in FIGS. 3B and 5B, the cleaning medium 200 is cleaned through the cleaning medium cleaning unit 400 (see FIG. 3B). Additional steps may be added. In addition, the cleaning medium 200 cleaned through the cleaning medium cleaning unit 400 may be supplied to clean the blade B through the supply unit 100a again.

The blade cleaning apparatus 30 according to an embodiment of the present invention includes a supply unit 100a, a recovery unit 100b, a first guide roller GR1, a second guide roller GR2, a cleaning medium 200, and a cleaning liquid. It may include a discharge unit 300 . In this case, the third part AR3, which is the end of the blade B, which has cleaned the inkjet head IH through the cleaning device 30 of the blade, the first part AR1 that is both sides of the blade H, and The remaining ink Ink, etc. attached to the second portion AR2 may be simultaneously removed.

Using the cleaned blade B through the cleaning device 30 of the blade, it is possible to clean the discharge part OL of the inkjet head IH contaminated again, and contact the discharge part OL of the inkjet head IH. In the third part AR3, which is the end of the blade B, there is no residual ink Ink, etc., so contamination and scratches by the blade B are prevented when cleaning the discharge part OL of the inkjet head IH. may not be induced. In addition, since the cleaning medium 200 that has cleaned the blade B is recovered by the recovery unit 100b, re-contamination of the blade B through the cleaning medium 200 with the remaining ink Ink or the like does not occur. can

Although the present invention has been described with reference to the embodiment shown in the drawings, which is merely exemplary, those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

1: Device for manufacturing a display device
10: inkjet printing unit
20: inkjet head cleaning unit
30: cleaning device of the blade
IH: inkjet head
OL: the ejection part of the inkjet head
C: Collector
B: blade
F: blade fixing part
100a: supply
100b: recovery unit
200: cleaning medium
300: cleaning solution discharge unit
400: cleaning medium cleaning unit
GR1, GR2: 1st guide roller, 2nd guide roller
R1, R2: 1st roller, 2nd roller

Claims (20)

cleaning medium;
a supply unit for supplying the cleaning medium to the blade; and
and a recovery unit arranged to be spaced apart from the supply unit and the blade therebetween, and for recovering the cleaning medium in contact with the blade;
The cleaning medium is unwound to the supply unit and supplied to the recovery unit, the blade cleaning apparatus. According to claim 1,
The width of the cleaning medium in the first direction and the width of the supply unit and the recovery unit in the first direction are the same, the cleaning apparatus of the blade. According to claim 1,
The cleaning apparatus of the blade, which is disposed between the supply unit and the blade, further comprising a cleaning liquid discharge portion for spraying the cleaning liquid on the cleaning medium. According to claim 1,
a first guide roller disposed between the supply unit and the blade; and
The blade cleaning apparatus further comprising a; a second guide roller disposed between the blade and the recovery unit. 5. The method of claim 4,
The rotation center of the first guide roller and the rotation center of the second guide roller are closer to the blade than the rotation center of the supply unit, the cleaning apparatus of the blade. 5. The method of claim 4,
The interval between the rotation center of the first guide roller and the rotation center of the second guide roller is greater than the width of the blade, the cleaning apparatus of the blade. According to claim 1,
and a width of the cleaning medium in the first direction is greater than a width of the blade in the first direction. According to claim 1,
The blade includes a first portion, a second portion opposite to the first portion, and a third portion connecting the first portion and the second portion,
and the cleaning medium is in contact with the first portion, the second portion and the third portion of the blade. 9. The method of claim 8,
The first part and the second part correspond to a side surface of the blade, and the third part is a part in which the blade cleans the ejection part of the inkjet head. According to claim 1,
It is disposed between the supply unit and the recovery unit, further comprising a cleaning medium cleaning unit for cleaning the cleaning medium,
The cleaning medium continues from the recovery unit through the cleaning medium cleaning unit to the supply unit. 11. The method of claim 10,
a first roller disposed between the supply unit and the cleaning medium cleaning unit; and
The cleaning apparatus of the blade further comprising a; a second roller disposed between the cleaning medium cleaning unit and the collecting unit. 12. The method of claim 11,
The rotation center of the first roller and the rotation center of the second roller are closer to the cleaning medium cleaning unit than the rotation center of the supply unit, the cleaning apparatus of the blade. According to claim 1,
The distance from the blade to the center of rotation of the supply unit is the same as the distance from the blade to the center of rotation of the recovery unit. contacting the cleaning medium with a first portion of the blade, a second portion opposite the first portion, and a third portion connecting the first portion and the second portion;
spraying a cleaning solution onto the cleaning medium;
moving the cleaning medium and cleaning the blade; and
Drying the blade using the cleaning medium that is not attached to the cleaning liquid; including a, cleaning method of the blade. 15. The method of claim 14,
In the cleaning of the blade and the drying of the blade, the cleaning medium vibrates in a first direction and rubs against the blade. 15. The method of claim 14,
The cleaning method of the blade further comprising the step of cleaning the cleaning medium. 17. The method of claim 16,
The cleaning method of the blade further comprising the step of cleaning the recontaminated blade using the cleaned cleaning medium. inkjet head;
a blade for cleaning the ejection part of the inkjet head;
a supply unit on which a cleaning medium for cleaning the blade is wound, and for supplying the cleaning medium;
Includes; a recovery unit for winding the cleaning medium supplied from the supply unit;
and the blade contacts the cleaning medium after cleaning the inkjet head. 19. The method of claim 18,
and a cleaning liquid discharge part disposed between the supply part and the blade and spraying the cleaning liquid onto the cleaning medium. 19. The method of claim 18,
a first guide roller disposed between the supply unit and the blade; and
It further includes; a second guide roller disposed between the blade and the recovery unit,
and a rotation center of the first guide roller and a rotation center of the second guide roller are closer to the blade than a rotation center of the supply unit.

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