KR20070046461A - Method for fabricating ink pattern, method for fabricating liquid crystal display and organic electroluminescence display including the same - Google Patents

Abstract

Provided are an ink pattern forming method in which pattern nonuniformity is alleviated, a manufacturing method of a liquid crystal display including the same, and a manufacturing method of an organic EL display including the same. An ink pattern forming method includes providing a substrate having a pattern groove surrounded by a partition wall, and spraying an ink drop from the ink nozzle provided in the ink jet head to the pattern groove while moving the ink jet head, wherein the ink drop is sprayed. The step of spraying by controlling the interval between the adjacent ink drops and / or the volume of the ink drop is sprayed to the pattern groove according to the region of the pattern groove.

Inkjet Device, Pattern Groove, Bulkhead, Liquid Crystal Display, Organic EL Display

Description

Method for fabricating ink pattern, method for fabricating liquid crystal display and organic electroluminescence display including the same}

1 is a schematic plan view showing a method of forming an ink pattern using an inkjet device according to a first embodiment of the present invention,

2 is a schematic cross-sectional view showing the actual ink ejection direction from the inkjet head according to the first embodiment of the present invention,

3 is a schematic cross-sectional view showing a region where ink is injected onto a substrate according to the first embodiment of the present invention,

4 is a cross-sectional view showing a distribution of ink drops ejected by the method according to the first embodiment of the present invention,

5 and 6 are cross-sectional views of the process step of the ink pattern forming method according to the first embodiment of the present invention,

7 is a cross-sectional view showing the distribution of ink drops ejected by the method according to the second embodiment of the present invention,

8 is a cross-sectional view for describing an ink pattern forming method according to a third exemplary embodiment of the present invention.

9 is a cross-sectional view showing the distribution of ink drops ejected by the method according to the third embodiment of the present invention,

10 is a cross-sectional view showing the distribution of ink drops ejected by the method according to the fourth embodiment of the present invention,

11 is a cross-sectional view showing the distribution of the ink pattern ejected by the method according to the fifth embodiment of the present invention,

12 is a flowchart illustrating a method of controlling the ejection of ink drops according to a sixth embodiment of the present invention.

13 is a schematic plan view of a flat panel display device according to an embodiment of the present invention;

14 is a cross-sectional view of a liquid crystal display manufactured by a method according to a seventh embodiment of the present invention;

Fig. 15 is a sectional view of an organic EL display device manufactured by the method according to the eighth embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10: inkjet head 11: inkjet nozzle

20: substrate 22: partition wall

23: pattern groove 30: ink drop

The present invention relates to an ink pattern forming method, a manufacturing method of a liquid crystal display device including the same, and a manufacturing method of an organic EL display device, and more particularly, to an ink pattern forming method using an inkjet device and to manufacturing a liquid crystal display device including the same. A method and a manufacturing method of an organic EL display device.

As the information society develops, the demand for display devices is changing in various forms, and in recent years, liquid crystal displays, organic luminescent displays, and plasma display panels have been developed. Various flat panel displays have been developed and used in various fields.

Flat panel displays, such as liquid crystal displays and organic EL displays, have already replaced CRTs in some areas because of their excellent image quality, light weight, thinness, and low power consumption. The liquid crystal display includes a liquid crystal panel including two substrates on which electrodes are formed and a liquid crystal layer interposed therebetween, and applies a voltage to the electrodes to rearrange the liquid crystal molecules of the liquid crystal layer to determine the amount of light transmitted. Adjust In addition, the organic EL display device displays an image by electrically exciting an fluorescent organic material.

On the other hand, the liquid crystal display and the organic EL display device are accompanied with various patterning processes, a photolithography process using a photoresist film is commonly used as a patterning process. However, the photolithography process is complicated and expensive. In order to improve this, many methods for forming a pattern using an inkjet printing apparatus instead of the conventional photolithography process have been studied.

Representative applications of the pattern forming method using an inkjet printing apparatus include a process of forming a color filter and a column spacer of a liquid crystal display, and in the organic EL display, a process of forming an organic light emitting layer or a hole transporting layer. Can be mentioned.

The process using the inkjet printing apparatus as described above requires a bank-shaped structure for containing ink. For example, it can be said that the black matrix of a liquid crystal display device and the partition of an organic EL display device correspond to this. However, when ink is supplied to the area enclosed by the bank structure, the amount of ink supplied in one structure varies depending on the moving direction and the moving speed of the inkjet, and the bank is caused by the difference in surface tension or surface energy of the liquid ink. It will not be able to completely fill the inside of the structure. The patterned structure thickness is thereby formed nonuniformly.

It is an object of the present invention to provide an ink pattern forming method in which the nonuniformity of an ink pattern is alleviated.

Another object of the present invention is to provide a method of manufacturing a liquid crystal display device including the ink pattern forming method as described above.

Another object of the present invention is to provide a method of manufacturing an organic EL display device including the ink pattern forming method as described above.

Technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

In accordance with another aspect of the present invention, there is provided a method of forming an ink pattern, the method including: providing a substrate having a pattern groove surrounded by a partition; and moving the ink jet head from the ink nozzle provided in the ink jet head. And injecting an ink drop into the groove, wherein the spraying of the ink drop may vary depending on the area of the pattern groove, and / or the volume of the ink drop and the interval between the neighboring ink drops injected into the pattern groove. Adjusting and spraying.

According to another aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device, which includes forming a bank-shaped black matrix pattern on an edge of a pixel on an insulating substrate and moving the ink jet head. And spraying an ink drop into a space surrounded by the black matrix pattern from an ink nozzle provided in the ink nozzle, wherein the spraying of the ink drop comprises: spacing between neighboring ink drops sprayed into the space surrounded by the black matrix pattern; And / or forming a color filter which is sprayed by adjusting the volume of the ink drop differently according to an area within a space surrounded by the black matrix pattern.

According to another aspect of the present invention, there is provided a method of manufacturing an organic EL display device, including forming a barrier rib on an edge of a pixel so as to partially overlap the electrode layer on an insulating substrate on which an electrode layer is formed for each pixel, and an inkjet device. Spraying an ink drop into a space enclosed by the partition wall from an ink nozzle provided in the inkjet head while moving the head, wherein ejecting the ink drop comprises ejecting the ink drop adjacent to the space enclosed by the partition wall; And forming an organic light emitting layer, which is a step of spraying by controlling the interval between and / or the volume of the ink drop differently according to a region within the space surrounded by the partition wall.

Specific details of other embodiments are included in the detailed description and the drawings.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the present embodiments are intended to complete the disclosure of the present invention, and the general knowledge in the art to which the present invention pertains. It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims. In the drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity.

The spatially relative terms " below ", " beneath ", " lower ", " above ", " upper " It may be used to easily describe the correlation of a device or components with other devices or components. Spatially relative terms are to be understood as including terms in different directions of the device in use or operation in addition to the directions shown in the figures. For example, when flipping a device shown in the figure, a device described as "below" or "beneath" of another device may be placed "above" of another device. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device can also be oriented in other directions, so that spatially relative terms can be interpreted according to orientation.

Hereinafter, an ink pattern forming method according to embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a schematic plan view showing an ink pattern forming method using an inkjet device according to a first embodiment of the present invention. In FIG. 1, only the inkjet head 10 of the inkjet apparatus is shown.

Referring to FIG. 1, the target substrate 20 on which the color pattern is formed includes a partition 22 and a matrix-shaped concave space 23 surrounded by the partition 22 (hereinafter referred to as a “pattern groove”). . The partition wall 22 may be made of, for example, a material that does not transmit light, or may have a multilayer structure including a layer made of the same.

The inkjet head 10 serves to provide ink to the substrate 20. The inkjet head 10 is provided with a plurality of nozzles 11. The plurality of nozzles 11 may for example be arranged on one straight line. Preferably, all distances 1 between neighboring nozzles 11 may be arranged to be constant.

The inkjet head 10 ejects ink through the nozzle 11 while moving in a constant direction as shown by the arrow of FIG. The amount of ink jetted and the frequency of jetting are determined by the vibration width and vibrational precondition of the inkjet head 10. The vibration of the inkjet head 10 may be controlled by, for example, the voltage applied to the inkjet head 10. In addition, when ink is supplied to the substrate 20, it is preferable that ink is not injected into the partition wall 22 of the substrate 20, and ink is provided only in the pattern groove 23. It can be controlled simultaneously by adjustment.

One nozzle 11 supplies ink to the pattern groove 23 belonging to one row coinciding with the moving direction. If the distance l between neighboring nozzles 11 and the distance h between neighboring rows of the pattern grooves 23 do not coincide, the inkjet head 10 is inclined with the rows of the pattern grooves 23. So that the nozzles 11 are aligned with each row of each pattern groove 23. That is, if the angle between the straight line in which the nozzles 11 are arranged and the straight line connecting the rows of the pattern grooves 23 is θ, θ is adjusted to satisfy the following expression (1).

Equation 1.

Although the interval between nozzles of an inkjet apparatus is fixed by the above method, it can apply to formation of the pattern which has various row spacing.

2 is a schematic cross-sectional view showing the actual ink ejection direction from the inkjet head according to the first embodiment of the present invention.

Referring to FIG. 2, the ink drop 30 ejected from the nozzle 11 has a constant moving speed v _j in the vertical direction. The vertical movement speed v _j of the ink drop 30 may vary depending on the ejection force of the ink jet head 11, for example, 2,000 to 9,000 mm / s.

On the other hand, since the inkjet head 11 moves horizontally, for example, the ink drop 30 has a moving speed v _h in the horizontal direction. The horizontal movement speed v _h of the ink 30 may be for example 200 to 1,000 mm / s. Therefore, the ink drop 30 ejected from the actual inkjet head 11 moves at the speed v _d of the vector sum of the vertical moving speed v _j and the horizontal moving speed v _h as shown in FIG. 2. do. That is, the actual jet direction of the ink drop 30 is inclined by a predetermined angle? From the vertical direction.

3 is a schematic cross-sectional view showing a region where ink is injected onto a substrate according to the first embodiment of the present invention. In FIG. 3, the arrow indicates the direction in which the ink drop is actually injected into the pattern groove while the inkjet head is moving.

Referring to FIG. 3, since the actual ejection direction of the ink drop is inclined by a predetermined angle? With respect to the vertical direction with respect to the substrate 20, no direct ink ejection is performed in the A region. In particular, when the moving speed of the ink jet head is further increased in order to improve the process speed, the inclination angle? Of the ejection direction with respect to the vertical direction becomes larger, so that the area of the A region where direct ink ejection is not made wider. Once the ink drop sprayed on the upper surface of the pattern groove 23 is a liquid phase, it is spread after spraying, but the area A may be thinner or deficient in thickness than the other regions of the pattern groove 23. Therefore, the thickness becomes relatively thicker toward the right side of FIG. 3, which may result in nonuniformity of the ink pattern thickness. In order to improve this, when a relatively large amount of ink is supplied to the region A, that is, the first region where ink is ejected from one pattern groove 23, the nonuniformity of the ink pattern thickness as described above can be alleviated.

으로 계산될 수 있지만, 잉크 드롭의 양의 상대적 비교가 용이하도록 편의상 R³으로 간략하게 표시될 것이다. 즉, 이하의 비교되는 잉크 드롭의 양은 상대적인 값으로 표현될 수 있다.4 is a cross-sectional view showing the distribution of ink drops ejected by the method according to the first embodiment of the present invention. In the following examples and some figures, the shape of the ink drop is shown as a sphere (circle in the cross section) for convenience. In the following embodiments, when the ink drop is spherical in shape and the radius is R, the amount of ink drop is

Can be calculated, but will be briefly labeled R ³ for convenience to facilitate relative comparison of the amount of ink drop. That is, the amount of ink drops to be compared below can be expressed as a relative value.

Referring to FIG. 4, the relative amounts r ^{3 of the} ejected ink drops 30 are the same, respectively, but the intervals d ₁ , d ₂ , d ₃ , d ₄ , d ₅ between the ejected ink drops 30 are identical. ) Is not the same. That is, at least one gap between the ink drops is arranged to be different from the other gaps. Preferably, the spacing (eg, d ₁ ) between the ink drop adjacent to the area A and the neighboring ink drop may be smaller than the spacing (eg, d ₅ ) between the neighboring ink drops far away from the area A. That is, the distance between neighboring ink drops may be the same or larger as the distance from the area A (d ₁ ≤ d ₂ ≤ d ₃ ≤ d ₄ ≤ d ₅ ).

Such a method of differently controlling the spacing of the ejected ink drop 30 is not limited thereto, but there are a method of adjusting the speed of the ink jet head and a method of modifying the ink drop ejection period. The method of modifying the double ink drop ejection cycle can be easily applied because it does not place too much strain on the inkjet apparatus. That is, as described above, the ejection of the ink drop is controlled by the voltage applied to the inkjet head. By changing the application period of such voltage, the ink drop ejection period can be easily changed.

5 and 6 are cross-sectional views of the process steps of the ink pattern forming method according to the first embodiment of the present invention.

Referring to FIG. 5, the ink drops injected into the pattern grooves 23 in the step of FIG. 4 spread in all directions and fill the pattern grooves 23 as shown in FIG. 5, and are aggregated into one. At this time, since a larger amount of ink is supplied adjacent to the A area by the method described with reference to FIG. 4, the amount of ink spreading to the A area where the actual injection is not made becomes relatively large. Therefore, thickness unevenness due to lack of ink in the area A can be alleviated.

As such, when the liquid ink patterns 31 which are united together are dried, a solid ink pattern 32 in which thickness unevenness is alleviated as shown in FIG. 6 is formed.

7 is a cross-sectional view showing the distribution of ink drops ejected by the method according to the second embodiment of the present invention.

Referring to FIG. 7, in this embodiment, unlike in the embodiment of FIG. 4, the distance d between the ejected ink drops 30 is constant, but the relative amounts r ₁ ³ and r of the ejected ink drops 30 are constant. ₂ ³ , r ₃ ³ , r ₄ ³ , r ₅ ³ , r ₆ ³ ) are not the same. That is, at least one of the ejected ink drops is arranged to be different in volume from other ink drops. Preferably the amount of ink drop adjacent to area A (eg, r ₁ ³ ) may be greater than the amount of ink drop away from area A (eg, r ₆ ³ ). That is, it can be arranged to be equal to the amount of ink drop smaller the farther from the area A or more ^{_{(r 1 3 ≥r 2 3 ≥r}} 3 3 ≥r 4 3 ≥r 5 3 ≥r 6 3).

The period-specific injection amount of the ink drop 30 can be easily adjusted by adjusting the voltage applied to the inkjet head.

The liquid ink drop 30 sprayed by the method according to the present embodiment spreads in all directions to form a solid ink pattern through the steps shown in FIGS. 5 and 6.

8 is a cross-sectional view for describing an ink pattern forming method according to a third exemplary embodiment of the present invention. 9 is a cross-sectional view showing the distribution of ink drops ejected by the method according to the third embodiment of the present invention.

A straight line m indicated by an arrow in FIG. 8 has a real jetting direction of the ink drop 30 inclined at a predetermined angle (Ф) with respect to the vertical direction, and represents a straight line passing through the upper edge of the partition wall 22.

Since the ink drop 30 ejected from the inkjet head should not touch the partition 22, it should be ejected at least to the right of the straight line m in FIG. In this case, in order to evenly fill and planarize the pattern groove 23, the ink drop 30 reaching the first pattern groove 23 should be positioned as close to the straight line m as possible, and preferably contact the straight line m.

In FIG. 8 two ink drops with different radii R ₁ <R ₂ satisfying this condition are shown. Referring to FIG. 8, an ink drop having a small radius R ₁ is far from an edge portion (area A) where the partition wall 22 and the pattern groove 23 meet, compared to an ink drop having a large radius R ₂ . It can be seen that the space is smaller. That is, when the radius of the ink drop 30 becomes small, the space where the ink 30 is not directly ejected is reduced.

Referring to FIG. 9, the ink 30 having a small radius is disposed adjacent to the area A, and as the distance from the area A increases, the radius of the ink 30 increases (R ₁₁ <R ₁₂ <R ₁₃ ). The drop 30 is arrange | positioned so that it may overlap more. Further away from the area A, the arrangement may be made in a conventional manner, or the ink drop 30 may be arranged in the same manner as in the first or second embodiment of the present invention. That is, the distribution of the ink drop 30 adjacent to the area A is adjusted in amount and spacing of the ink drop separately from other areas. As a result, the amount of ink provided in the area A can be further increased, and unevenness of the ink pattern can be alleviated.

In the first to third embodiments of the present invention, various methods for supplying a relatively large amount of ink to a first region where ink drops are ejected from one pattern groove 23 are disclosed. Of course, they can be combined with each other.

On the other hand, thickness nonuniformity may arise in the area | regions other than the initial area | region to which ink drop is sprayed according to the conditions, such as the viscosity, the injection quantity, injection pre-conciliation of the ink to be sprayed. For example, since the ink drop injected into the pattern groove is a liquid phase, the surface may be convex due to the surface tension of the liquid even if it spreads in all directions and aggregates into one. In this case, the thickness of the periphery becomes relatively thin. A method for improving such a phenomenon will be described with reference to FIGS. 10 and 11.

10 is a cross-sectional view showing the distribution of ink drops ejected by the method according to the fourth embodiment of the present invention. Referring to FIG. 10, the relative amount r ₁₀ ³ of the ink drop 30 ejected from the inkjet head and disposed on the pattern groove 23 is the same, but the distance d ₁₁ between neighboring ink drops 30 is equal. d ₁₂ , d ₁₃ , d ₁₄ , d ₁₅ ) are arranged differently. The distance d ₁₁ , d ₁₅ between the periphery of the pattern groove 23, that is, the neighboring ink drops 30 located on both sides of the pattern groove 23 in FIG. 10, is the distance between the ink drops 30 located in the center. It is narrower than (d ₁₃ ). Therefore, a relatively large amount of ink can be supplied to the periphery of the pattern groove 23, so that variation in ink pattern thickness due to surface tension can be alleviated.

11 is a cross-sectional view showing the distribution of the ink pattern ejected by the method according to the fifth embodiment of the present invention. Referring to FIG. 11, the distance d ₁₀ between the ink drops 30 disposed on the pattern grooves 23 is the same, but the relative amounts of the ejected ink drops 30 are r ₁₁ ³ , r ₁₂ ³ , r ₁₃ ³ , r ₁₄ ³ , r ₁₅ ³ , r ₁₆ ³ ) are not the same. The amount of ink drops (eg r ₁₁ ³ , r ₁₆ ³ ) located at the periphery of the pattern groove 23 is greater than the amount of ink drops (eg r ₁₃ ³ , r ₁₄ ³ ) located at the center of the pattern groove 23. It is arranged to be large. Therefore, a relatively large amount of ink can be supplied to the periphery of the pattern groove 23.

These methods of the fourth and fifth embodiments of the present invention can be combined with each other. In addition, according to the kind, condition, etc. of the ink, various methods of the first to fifth embodiments of the present invention may be combined with each other. That is, when a specific portion of the ink pattern is formed thicker or thinner than other portions, the degree of nonuniformity can be alleviated by adjusting the amount and / or spacing of the ink drop ejected. Such control of the amount and / or spacing of the ejected ink can be made by control means provided inside or outside the inkjet apparatus. The control means is provided with an input portion and a display portion.

Hereinafter, a method of specifically controlling the amount and / or spacing of the ejected ink drop mentioned in the first to fifth embodiments of the present invention will be described.

12 is a flowchart showing a method of controlling the ejection of an ink drop according to a sixth embodiment of the present invention.

Referring to FIG. 12, first, a drop number, a drop interval, and a drop amount are input through an input unit of a control means (S1).

Subsequently, a simulation screen corresponding to the input drop condition is output to the display unit (S2). Based on this simulation screen, it is determined whether or not the ink drop condition is deformed (S3). That is, if it appears as defective on the simulation screen or needs to be re-adjusted, the corresponding part is selected, the drop number, the drop interval, and the drop amount are input again (S4), and the simulation screen is output again. The steps for recalibrating and simulating such drop conditions are repeated until the simulation screen is normal.

If there is no abnormality in the drop number, drop interval, and drop amount from the simulation screen, it is determined whether the spraying pre-conciliation calculated therefrom falls within the normal range of the inkjet head (S5). The inkjet head cannot exceed this because the maximum possible jetting priority is determined for each model. Specifically, assuming that the moving speed of the inkjet head is constant, the jetting pre-conciliation is related to the ink drop interval. That is, the drop interval is minimum when the ink is ejected in the maximum degree of decency. Therefore, when the drop interval defined by the drop condition is smaller than the drop interval corresponding to the maximum pre-conciliation, the injection capability of the inkjet head is exceeded, since the injection must be performed with a higher pre-concierge than the maximum pre-conciliation. This will result in defective ink patterns and / or device failures. In this case, the drop condition must be readjusted from the beginning.

If the spraying precondition according to the drop condition is within the normal jetting preci- sion range of the inkjet head, such a condition is input into the memory and the ink is sprayed onto the substrate (S6). Here, the inspection as to whether or not the substrate on which the ink is jetted may be performed simultaneously or subsequently.

Next, a method of manufacturing a flat panel display device to which an ink pattern forming method according to embodiments of the present invention is applied will be described. Examples of flat panel displays include liquid crystal displays, organic EL displays, and plasma display devices.

13 is a schematic plan view of a flat panel display device according to example embodiments. Referring to FIG. 13, the flat panel display has a structure in which red, green, and blue light emitting regions are repeated in a matrix form. Each of the regions for implementing the red, green, and blue colors becomes one pixel, and neighboring red, green, and blue pixels gather to form a dot.

14 is a cross-sectional view of a liquid crystal display manufactured by a method according to a seventh embodiment of the present invention. Referring to FIG. 14, a gate electrode 220 is formed on a first insulating substrate 210 of the liquid crystal display device 400, and a gate insulating layer 230 is formed on the gate electrode 220. The semiconductor layer 240 overlaps at least a portion of the gate electrode 220, and is insulated by the gate insulating layer 230. The source electrode 265 and the drain electrode 266 are formed on the semiconductor layer 240 via the ohmic contacts 255 and 256, and the drain electrode is connected to the pixel electrode 280.

Meanwhile, a black matrix 320 is formed under the second insulating substrate 310 that faces the first insulating substrate 210. The black matrix 320 blocks light and prevents light leakage. The black matrix 320 may include an organic material. In addition, the black matrix 320 may include carbon black.

The black matrix 320 is formed in a bank shape around the pixels and arranged in a lattice shape. The pixel areas between the black matrix 320 are filled with red 330R, green 330G, and blue 330B filters. The color filter 330 may be formed using an inkjet printing apparatus. In this case, the method described in the first to fifth embodiments of the present invention and the like may be applied to the specific forming method, and redundant description thereof will be omitted. The planarization layer 340 and the common electrode 350 are formed under the black matrix 320 and the color filter 330.

The cell gap is maintained by the spacer 320 of the first insulating substrate 210 and the second insulating substrate 310, and the liquid crystal molecules 370 are filled in the cell gap. In Fig. 14, column spacers are formed as spacers. Above and below the liquid crystal layer of the liquid crystal molecules 380, alignment layers 290 and 360 which impart an alignment force to the liquid crystal molecules 380 are positioned.

Fig. 15 is a sectional view of an organic EL display device manufactured by the method according to the eighth embodiment of the present invention.

Referring to FIG. 15, in the organic EL display device 500, a first electrode layer 520 is formed for each pixel on an insulating substrate 510 made of glass or the like. The partition wall 530 is formed on the first electrode layer 520. The partition wall 530 is formed to surround one pixel area. The hole transport layer 540 is formed in the space surrounded by the partition wall 530. The red emission layer 550R, the green emission layer 550G, and the blue emission layer 550B made of an organic material are formed on the hole transport layer 540. Here, the hole transport layer 540 and the organic light emitting layers 550R, 550G, and 550B formed in the space surrounded by the partition wall 530 may be formed to have a uniform thickness by forming the method according to the first to fifth embodiments of the present invention. Can be. The second electrode layer 560 is formed on the organic emission layer 550 to serve as a cathode for the first electrode layer 520.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above embodiments but may be manufactured in various forms, and having ordinary skill in the art to which the present invention pertains. It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.

As described above, according to the ink pattern forming method according to the embodiments of the present invention, the amount of ink to be ejected can be easily adjusted according to the area on the corresponding substrate. Therefore, the nonuniformity of the ink pattern thickness due to the difference in the amount of ink ejected can be alleviated.

Claims (14)

Providing a substrate having a pattern groove surrounded by a partition wall; And Spraying an ink drop in the pattern groove from an ink nozzle provided in the ink jet head while moving the ink jet head, The spraying of the ink drop is an ink pattern forming method of spraying by controlling the interval between the adjacent ink drops and / or the volume of the ink drop is injected into the pattern groove according to the area of the pattern groove differently. According to claim 1, And the spacing between the neighboring ink drops is sprayed to be the smallest in the region where ink drops are first provided within the pattern groove. According to claim 1, And the spacing between the neighboring ink drops is ejected to be the same or larger as the distance from the area where the ink drop is first provided in the pattern groove is increased. According to claim 1, And a spacing between the neighboring ink drops is greatest in the central region of the pattern groove. According to claim 1, And an interval between the neighboring ink drops is sprayed to be equal to or larger from both sides of the pattern groove toward the center of the pattern groove with respect to the moving direction of the inkjet head. The method according to any one of claims 2 to 5, An interval between the neighboring ink drops is controlled by a deformation of a voltage period applied to the inkjet head. According to claim 1, And the volume of the ink drop is sprayed to be the largest in the region where the ink drop is first provided within the pattern groove. According to claim 1, And the volume of the ink drop is ejected to be the same or smaller as it moves away from the area where the ink drop is first provided in the pattern groove. According to claim 1, And the volume of the ink drop is sprayed to be the smallest in the central region of the pattern groove. According to claim 1, And the volume of the ink drop is sprayed to be equal to or smaller from both sides of the pattern groove toward the center of the pattern groove with respect to the moving direction of the inkjet head. The method according to any one of claims 7 to 10, And the volume of the ink drop is adjusted by the deformation of the voltage magnitude applied to the inkjet head. According to claim 1, And an area in which the ink drop is first provided in the pattern groove is ejected so that a small volume of the ink drop overlaps at a narrow interval. Forming a bank-shaped black matrix pattern on an edge of the pixel on the insulating substrate; And Spraying an ink drop in a space surrounded by the black matrix pattern from an ink nozzle provided in the ink jet head while moving the ink jet head, The spraying of the ink drop may be performed by differently adjusting the distance between adjacent ink drops and / or the volume of the ink drop injected into the space surrounded by the black matrix pattern according to an area within the space surrounded by the black matrix pattern. A method of manufacturing a liquid crystal display device comprising the step of forming a color filter which is a step of spraying. Forming barrier ribs at edges of the pixels so as to partially overlap with the electrode layers on the insulating substrate on which the electrode layers are formed for each pixel; And Spraying an ink drop in a space surrounded by the partition wall from an ink nozzle provided in the ink jet head while moving the ink jet head, The spraying of the ink drop may be performed by differently controlling the spacing between adjacent ink drops and / or the volume of the ink drop that is injected into the space surrounded by the partition wall according to an area within the space surrounded by the partition wall. A method of manufacturing an organic EL display device comprising forming an organic light emitting layer.

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