Display device manufacturing device and manufacturing method

Abstract

In order to be able to confirm in real time during an ink ejection process a display device having a defective ink ejection, the present invention provides a display device manufacturing device and a manufacturing method, comprising: a table on which a component is placed; a ejection unit, which is equipped with a head, a first nozzle portion, and a second nozzle portion, wherein the head can reciprocate along a first direction on the table, the first nozzle portion and the second nozzle portion are arranged on one side of the head along a second direction intersecting the first direction, and eject ink toward the component; a laser unit, which emits a first laser beam and a second laser beam corresponding to the first nozzle portion and the second nozzle portion, respectively; a sensor unit, which receives the first laser beam and the second laser beam and measures the respective intensities of the first laser beam and the second laser beam; and a judgment unit, which judges whether the ink ejection is defective based on the measurement result of the intensity.

Description

Technical Field

[0001] The present invention relates to a manufacturing device and a manufacturing method of a display device, and more particularly to a manufacturing device and a manufacturing method of a display device capable of inspecting ink ejection defects in an ink ejection process. Background Art

[0002] Electronic devices based on mobility are widely used. In addition to small electronic devices such as mobile phones, tablet computers are also widely used as mobile electronic devices.

[0003] Such mobile electronic devices include display devices in order to support various functions and to provide visual information such as images or videos to users. Recently, as other components for driving the display devices tend to be miniaturized, the proportion of display devices in electronic devices is gradually increasing, and they are also being developed from a flat state to a structure that can be bent in a manner having a predetermined angle.

[0004] When manufacturing such a display device, in order to form an organic layer on a component, for example, an inkjet printing process may be used. In the above process, a device that ejects ink as a coating material may be used. However, if the ink ejection is poor in the ejection device, it may result in poor product quality. Therefore, it may be necessary to inspect the device and method for the ejection defect. Summary of the invention

[0005] Conventional display device manufacturing apparatuses inspect for discharge defects in a separate inspection process after the ink discharge process is completed, and thus there is a problem that discharge defects cannot be confirmed in the ink discharge process.

[0006] The present invention is intended to solve various problems including the above-mentioned problems, and another object is to provide a manufacturing device and a manufacturing method of a display device that can detect ejection defects in an ink ejection process. However, this subject is only exemplary and does not limit the scope of the present invention.

[0007] According to one aspect of the present invention, there is provided a manufacturing device for a display device, comprising: a table on which a component is placed; a spraying unit equipped with a head, a first nozzle portion and a second nozzle portion, wherein the head can reciprocate along a first direction on the table, the first nozzle portion and the second nozzle portion are arranged on one side of the head along a second direction intersecting the first direction, and spray ink toward the component; a laser unit that emits a first laser beam and a second laser beam corresponding to the first nozzle portion and the second nozzle portion, respectively; a sensor unit that receives the first laser beam and the second laser beam and measures the respective intensities of the first laser beam and the second laser beam; and a judgment unit that judges whether the ink is sprayed poorly based on the measurement result of the intensity.

[0008] According to the present embodiment, at least a portion of the paths of the first laser beam and the second laser beam may intersect with the first ejection path of the first nozzle portion and the second ejection path of the second nozzle portion, respectively.

[0009] According to the present embodiment, the laser unit may include: a laser generating section that generates a fundamental laser beam; and a laser dividing section that divides the fundamental laser beam into the first laser beam and the second laser beam.

[0010] According to this embodiment, the laser unit may include: a distance adjusting portion for adjusting a distance between the first laser beam and the second laser beam.

[0011] According to the present embodiment, the laser unit may include an emission angle adjustment unit that adjusts the emission angles of the first laser beam and the second laser beam so that the paths of the first laser beam and the second laser beam are parallel to each other.

[0012] According to this embodiment, the emission position of the laser unit and the light receiving position of the sensor unit may be arranged on the same plane.

[0013] According to this embodiment, the same plane may be located between the ejection unit and the component.

[0014] According to this embodiment, the manufacturing apparatus of the display device may further include: a first driving unit and a second driving unit, which respectively raise and lower the laser unit and the sensor unit.

[0015] According to this embodiment, the manufacturing device of the display device may further include: a mirror to adjust the paths of the first laser beam and the second laser beam.

[0016] According to this embodiment, the manufacturing device of the display device may further include: a third driving unit to lift and lower the mirror.

[0017] According to the present embodiment, the laser unit may be arranged on the table, and may emit the first laser beam and the second laser beam toward a first surface of the table on which the component is placed.

[0018] According to this embodiment, the laser unit can also emit a third laser beam corresponding to a first area located on one side of the first ejection path, a fourth laser beam corresponding to a second area located between the first ejection path and the second ejection path; and a fifth laser beam corresponding to a third area located on one side of the second ejection path. The first area can place the first ejection path between and on the opposite side of the second area, and the third area can place the second ejection path between and on the opposite side of the second area.

[0019] According to this embodiment, at least a portion of the paths of the first laser beam and the second laser beam intersect with the first ejection path of the first nozzle portion and the second ejection path of the second nozzle portion, respectively, and at least a portion of the paths of the third laser beam to the fifth laser beam can pass through the first area, the second area, and the third area, respectively.

[0020] According to this embodiment, the laser unit may emit a laser beam in the form of a line extending along the second direction.

[0021] According to this embodiment, at least a portion of the path of the linear laser beam can pass through the first ejection path of the first nozzle portion, the second ejection path of the second nozzle portion, a first area located on one side of the first ejection path, a second area located between the first ejection path and the second ejection path, and a third area located on one side of the second ejection path, and the first area can be located on the opposite side of the second area with the first ejection path placed therebetween, and the third area can be located on the opposite side of the second area with the second ejection path placed therebetween.

[0022] According to another aspect of the present invention, there is provided a method for manufacturing a display device, comprising the following steps: preparing a component on a table; a first nozzle portion and a second nozzle portion arranged along a first direction ejecting ink onto the component; emitting a first laser beam and a second laser beam corresponding to a first ejection path of the first nozzle portion and a second ejection path of the second nozzle portion, respectively; the first laser beam and the second laser beam intersecting the first ejection path and the second ejection path, respectively; receiving the first laser beam and the second laser beam and measuring their respective intensities; and determining that the first nozzle portion and the second nozzle portion have respective ejection defects if the respective intensities of the first laser beam and the second laser beam are above a predetermined reference value.

[0023] According to this embodiment, the method for manufacturing the display device may further include the following step: adjusting paths of the first laser beam and the second laser beam so that the first laser beam and the second laser beam travel toward between the component and the first nozzle portion and the second nozzle portion.

[0024] According to this embodiment, the step of emitting the first laser beam and the second laser beam may include the steps of: generating a basic laser beam; and splitting the basic laser beam into the first laser beam and the second laser beam for emission.

[0025] According to this embodiment, the step of emitting the first laser beam and the second laser beam may include the following steps: adjusting the distance between the first laser beam and the second laser beam; and adjusting the emission angles of the first laser beam and the second laser beam, respectively, so that the paths of the first laser beam and the second laser beam are parallel to each other.

[0026] According to this embodiment, the manufacturing method of the display device may further include the following steps: emitting a third laser beam corresponding to a first area located on one side of the first ejection path, a fourth laser beam corresponding to a second area located between the first ejection path and the second ejection path, and a fifth laser beam corresponding to a third area located on one side of the second ejection path; the third laser beam to the fifth laser beam pass through the first area to the third area respectively; and receiving the third laser beam to the fifth laser beam to measure their respective intensities, wherein the step of determining the ejection defect may include the following steps: if the intensities of the first laser beam, the third laser beam and the fourth laser beam are all above a reference value, determining that the first nozzle unit is defective due to non-ejection; and if the intensities of the second laser beam, the fourth laser beam and the fifth laser beam are all above a reference value, determining that the second nozzle unit is defective due to non-ejection.

[0027] According to this embodiment, the step of determining the poor ejection may further include the following steps: if the intensity of the first laser beam is above a reference value, and any one of the intensity of the third laser beam and the intensity of the fourth laser beam is less than the reference value, then the ejection angle of the first nozzle unit is determined to be poor; if the intensity of the second laser beam is above a reference value, and any one of the intensity of the fourth laser beam and the intensity of the fifth laser beam is less than the reference value, then the ejection angle of the second nozzle unit is determined to be poor.

[0028] According to another aspect of the present invention, there is provided a method for manufacturing a display device, comprising the following steps: preparing a component on a table; spraying ink onto the component by a first nozzle unit and a second nozzle unit arranged along a first direction; emitting a linear laser beam extending along the first direction; receiving the laser beam and measuring the intensity; and determining whether the spraying of each of the first nozzle unit and the second nozzle unit is defective.

[0029] According to this embodiment, the laser beam may include parts corresponding to the first ejection path of the first nozzle portion, the second ejection path of the second nozzle portion, a first area located on one side of the first ejection path, a second area located between the first ejection path and the second ejection path, and a third area located on one side of the second ejection path.

[0030] According to this embodiment, the step of measuring the intensity may include the following steps: measuring the first intensity and the second intensity of each of the parts of the laser beam corresponding to the first ejection path and the second ejection path; and measuring the third intensity, the fourth intensity and the fifth intensity of each of the parts of the laser beam corresponding to the first area to the third area.

[0031] According to this embodiment, the step of determining whether the ejection is defective may include the following steps: if the first intensity, the third intensity, and the fourth intensity are all above a reference value, it is determined that the first nozzle unit is defective due to non-ejection; and if the second intensity, the fourth intensity, and the fifth intensity are all above a reference value, it is determined that the second nozzle unit is defective due to non-ejection.

[0032] According to this embodiment, the step of determining the poor ejection may include the following steps: if the first intensity is above a reference value and any one of the third intensity and the fourth intensity is less than the reference value, then the ejection angle of the first nozzle unit is determined to be poor; and if the second intensity is above a reference value and any one of the fourth intensity and the fifth intensity is less than the reference value, then the ejection angle of the second nozzle unit is determined to be poor.

[0033] Other aspects, features, and advantages in addition to the foregoing description will become apparent from the following detailed description for carrying out the invention, the claims, and the accompanying drawings.

[0034] Such general and specific aspects may be implemented using a system, a method, a computer program, or any combination of systems, methods, and computer programs.

[0035] According to one embodiment of the present invention configured as above, ejection failure can be confirmed in real time during the ink ejection process, thereby improving product productivity, and realizing a manufacturing device and a manufacturing method for a display device that can realize efficient process execution. Of course, the scope of the present invention is not limited to such effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 FIG. 1 is a cross-sectional view schematically illustrating a manufacturing apparatus of a display device according to an embodiment of the present invention.

[0037] Figure 2 is a cross-sectional view schematically illustrating a manufacturing apparatus of a display device according to another embodiment of the present invention.

[0038] Figure 3 is a cross-sectional view schematically illustrating a manufacturing apparatus of a display device according to still another embodiment of the present invention.

[0039] Figure 4 is a plan view schematically illustrating a part of a manufacturing apparatus of a display device according to an embodiment of the present invention.

[0040] Figure 5a as well as Figure 5b is a cross-sectional view schematically illustrating a part of a manufacturing apparatus of a display device according to an embodiment of the present invention.

[0041] Figure 6a as well as Figure 6b It is schematically shown Figure 5b A cross-sectional view of an operating method of a manufacturing device of a display device.

[0042] Figure 7 is a cross-sectional view schematically showing a part of a manufacturing apparatus of a display device according to an embodiment of the present invention.

[0043] Figures 8a to 8c It is schematically shown Figure 7 A cross-sectional view of an operating method of a manufacturing device of a display device.

[0044] Fig. 9 is a cross-sectional view schematically illustrating a part of a manufacturing apparatus of a display device according to an embodiment of the present invention.

[0045] Fig.10 It is schematically shown Fig. 9 A cross-sectional view of an operating method of a manufacturing device of a display device.

[0046] Explanation of symbols:

[0047] 1: Display device manufacturing device

[0048] 10: Countertop

[0049] 20: ejection unit

[0050] 20H: Head

[0051] 20N: Nozzle

[0052] 30: Laser unit

[0053] 40: Sensor unit

[0054] 50: Judgment unit

[0055] 61: First drive unit

[0056] 62: Second drive unit

[0057] 63: The third drive unit

[0058] A1~A3: Area 1 to Area 3

[0059] L: Laser beam

[0060] P: ejection path DETAILED DESCRIPTION

[0061] The present invention is susceptible of various modifications and embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention and methods of achieving the same are described in detail with reference to the attached drawings. Figure 1 This will become clear from the embodiments described in detail later. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various forms.

[0062] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. When describing with reference to the accompanying drawings, the same or corresponding components are given the same reference numerals and repeated descriptions thereof are omitted.

[0063] In the following embodiments, the terms "first" and "second" are not used in a limiting sense but are used for the purpose of distinguishing one constituent element from other constituent elements.

[0064] In the following embodiments, as long as other meanings are not clearly indicated in the context, expressions in the singular include expressions in the plural.

[0065] In the following embodiments, terms such as “including” or “having” indicate the existence of features or constituent elements recorded in the specification, and do not preclude the possibility of adding one or more other features or constituent elements.

[0066] In the following embodiments, when it is mentioned that a part of a film, region, component, etc. is located on or above another part, it includes not only the situation where it is immediately above the other part, but also the situation where other films, regions, components, etc. are sandwiched therebetween.

[0067] In the drawings, the size of the components may be exaggerated or reduced for the convenience of explanation. For example, the size and thickness of each component shown in the drawings are arbitrarily shown for the convenience of explanation, and therefore the present invention is not necessarily limited to the contents shown in the drawings.

[0068] In the case where a certain embodiment can be implemented in different ways, a specific process sequence can be performed in a different order than described. For example, two processes described in succession can be performed substantially simultaneously, or in a reverse order to the described order.

[0069] In the present specification, "A and / or B" means A, B, or both A and B. Also, "at least one of A and B" means A, B, or both A and B.

[0070] In the following embodiments, when it is mentioned that a film, region, component, etc. is connected, it includes not only the case where the film, region, component, etc. are directly connected, but also the case where another film, region, component, etc. is sandwiched between them and they are indirectly connected. For example, in this specification, when it is mentioned that a film, region, component, etc. is electrically connected, it not only means the case where the film, region, component, etc. are directly electrically connected, but also means the case where another film, region, component, etc. is sandwiched between them and they are indirectly electrically connected.

[0071] The x-axis, y-axis, and z-axis are not limited to the three axes on the rectangular coordinate system, and can be interpreted as including a broad meaning thereof. For example, the x-axis, y-axis, and z-axis can also refer to different directions that are not perpendicular to each other, although they can also be perpendicular to each other.

[0072] Figure 1 FIG. 1 is a cross-sectional view schematically illustrating a manufacturing apparatus of a display device according to an embodiment of the present invention.

[0073] Reference Figure 1 The manufacturing apparatus 1 of the display device may include a table 10 , a discharge unit 20 , a laser unit 30 , a sensor unit 40 , a determination unit 50 , a first driving unit 61 , and a second driving unit 62 .

[0074] A component S may be placed on one side of the table 10. The component S may be an object of a process performed by the display device manufacturing apparatus 1. The component S may be a display device or a part thereof, for example, a component or film used in the manufacture of an organic light-emitting display device. The table 10 may have a flat surface on which the component S may be placed, and the surface on which the component S is placed may have a shape such as a quadrilateral.

[0075] The table 10 may be fixed, or may be relatively movable in relation to the ejection unit 20 described below. For the sake of convenience, the following description will focus on the case where the table 10 is fixed.

[0076] The ejection unit 20 may eject ink as a substance applied to the member S. The ejection unit 20 may include a head portion 20H and a nozzle portion 20N. The head portion 20H may be disposed on an upper portion of the stage 10 and may reciprocate in the x direction.

[0077] At least two nozzle units 20N may be provided on one side of the head 20H. The nozzle units 20N may be arranged along the y direction intersecting the x direction. The nozzle unit 20N may receive ink from the head 20H and may eject ink droplets toward the component S. In this case, the component S will become a coating object, and the surface of the component S facing the nozzle unit 20N will become a coating object surface. The ink as the coating material may be in a liquid state, for example, may include a pigment, a dye, a binder, a luminescent material solution, etc.

[0078] The laser unit 30 may be arranged to be separated from the component S. For example, the laser unit 30 may be arranged to be separated from the component S along the moving direction of the head 20H. The laser unit 30 may generate a laser beam L and emit it toward the outside. At this time, the laser beam L may be an inspection laser beam and may have a linear path. As an example, the laser beam L may travel from the laser unit 30 toward the component S and the ejection unit 20. The laser unit 30 may emit more than one laser beam L. In the case where the laser unit 30 emits one laser beam L, at least two laser units 30 may be provided in the manufacturing device 1 of the display device.

[0079] The sensor unit 40 may receive the laser beam L emitted by the laser unit 30. And, the sensor unit 40 may measure the intensity of the received laser beam L. In the case of receiving more than two laser beams L, the sensor unit 40 may measure the intensity of each received laser beam L. The intensity of the laser beam may be the light amount of the laser beam.

[0080] The sensor unit 40 may be arranged to be separated from the component S. For example, the sensor unit 40 may be arranged to be separated along the moving direction of the head 20H. The sensor unit 40 may be arranged on the opposite side of the laser unit 30 so that the component S is arranged therebetween. At this time, the light receiving position RP where the sensor unit 40 receives the laser beam L may be on the same plane R as the emission position EP where the laser unit 30 emits the laser beam L. Here, the plane R may be located between the ejection unit 20 and the component S as an imaginary plane. Accordingly, the distance from the laser beam L emitted from the laser unit 30 passing through the ejection unit 20 and the component S to reaching the sensor unit 40 may be minimized. By minimizing the length of the path of the laser beam L, the loss of the intensity of the laser beam L may be minimized. As described below, this allows for a more accurate judgment to be made as to whether the ink ejection is defective.

[0081] The judgment unit 50 can judge whether the ink ejection of the ejection unit 20 is defective. The judgment unit 50 can receive the measurement result of the intensity of the laser beam L by the sensor unit 40, and can judge whether the ink ejection is defective based on the measurement result. The judgment unit 50 can receive a data signal for the measurement result from the sensor unit 40 via wire or wirelessly. The judgment method will refer to Figure 6a as well as Figure 6b To be described later.

[0082] The first driving unit 61 and the second driving unit 62 may be arranged on the table 10. The first driving unit 61 may lift the laser unit 30. The first driving unit 61 may include: a first power element 61d, which provides power for lifting; and a first base 61m, which supports the laser unit 30 and is connected to the first power element 61d. The second driving unit 62 may lift the sensor unit 40. The second driving unit 62 may include: a second power element 62d, which provides power for lifting; and a second base 62m, which supports the sensor unit 40 and is connected to the second power element 62d.

[0083] For example, the first power element 61d and the second power element 62d may include linear motion devices such as pneumatic cylinders, hydraulic cylinders, linear motors, motors, and racks. The first base 61m and the second base 62m may include a storage portion and a fastening mechanism such as a bolt, respectively, so as to be firmly fixed to the laser unit 30 and the sensor unit 40 to support them.

[0084] The ejection unit 20 can reciprocate along the x direction on the component S, and at this time, the first driving unit 61 and the second driving unit 62 can respectively raise and lower the laser unit 30 and the sensor unit 40 arranged on both sides of the component S so that they do not collide with the ejection unit 20. In this way, the device can be prevented from being damaged and safety can be ensured.

[0085] Furthermore, the first driving unit 61 and the second driving unit 62 can be used to ensure a space for preparing the component S on the table 10. The component S can be placed on the table 10 by a robot arm, etc. At this time, the laser unit 30 and the sensor unit 40 can be raised and lowered to prevent collision with the component S or the robot arm, etc.

[0086] Figure 2 is a cross-sectional view schematically illustrating a manufacturing apparatus for a display device according to another embodiment of the present invention. Figure 1 The configuration of the manufacturing device of the display device described above is the same as the configuration described above, and the following description will focus mainly on the differences.

[0087] Reference Figure 2 The manufacturing apparatus 1 of the display device may be equipped with a mirror m for adjusting the path of the laser beam L so that at least a portion of the path of the laser beam L is located between the ejection unit 20 and the component S. The mirror m may reflect the incident laser beam L at a predetermined angle. Figure 2 4 shows a case where four mirrors m are provided, but the present invention is not limited thereto, and the number of mirrors may be selected according to the arrangement of the laser unit 30 and the sensor unit 40 and the like.

[0088] The laser beam L emitted from the laser unit 30 may proceed toward the first mirror m1, and may be reflected at one side of the first mirror m1 and proceed toward the second mirror m2. The laser beam L incident on the second mirror m2 may be reflected at one side of the second mirror m2 again and pass through the space between the component S and the ejection unit 20. Subsequently, the laser beam L may be incident on the third mirror m3, and may be reflected at one side of the third mirror m3 and proceed toward the fourth mirror m4. The laser beam L incident on the fourth mirror m4 may be reflected at one side of the fourth mirror m4 and finally reach the sensor unit 40.

[0089] The manufacturing device 1 of the display device may be equipped with a third driving unit 63 for lifting the mirror m. The third driving unit 63 may include: a third power element 63d, which provides power for lifting; and a third base 63m, which supports the mirror m and is connected to the third power element 63d. The third driving unit 63 can lift the mirror m similarly to the first driving unit 61 and the second driving unit 62 described above to prevent the mirror m from colliding with the ejection unit 20 or the component S. Accordingly, the device can be prevented from being damaged and safety can be ensured. Figure 2 Although the figure shows a case where two third driving units 63 are provided, the present invention is not limited thereto, and the number of the third driving units 63 can be selected according to the number of the mirrors m.

[0090] As described above, the display device manufacturing apparatus 1 can be equipped with the mirror m and the third driving unit 63 , so that the laser unit 30 and the sensor unit 40 can be arranged in various ways.

[0091] Figure 3 is a cross-sectional view schematically illustrating a manufacturing device of a display device according to another embodiment of the present invention. Figure 2 The configuration of the manufacturing device of the display device described above is the same as the configuration described above, and the following description will focus mainly on the differences.

[0092] Reference Figure 3 , the laser unit 30 may be arranged to overlap the table 10 at the upper portion of the table 10. Also, the laser unit 30 may emit the laser beam L toward the first surface 10a of the table 10 on which the component S is placed. In this case, the manufacturing apparatus 1 of the display device may be equipped with a mirror m that adjusts the path of the laser beam L so that at least a portion of the path of the laser beam L is located between the ejection unit 20 and the component S.

[0093] For example, the laser beam L emitted from the laser unit 30 may travel toward the fifth mirror m5 in the −z direction, and may be reflected at one side of the fifth mirror m5 to pass through the space between the component S and the ejection unit 20. Subsequently, the laser beam L may be incident toward the sixth mirror m6, and may be reflected at one side of the sixth mirror m6 to finally reach the sensor unit 40.

[0094] By the above arrangement, the area occupied by the display device manufacturing apparatus 1 can be minimized. Therefore, the limitation on the space for installing the display device manufacturing apparatus 1 can be reduced.

[0095] Figure 4 FIG. 1 is a plan view schematically illustrating a portion of a manufacturing apparatus for a display device according to an embodiment of the present invention. Figure 4 The internal structure of the laser unit is schematically illustrated.

[0096] Reference Figure 4 The laser unit 30 may include a laser generating section 31 , a laser dividing section 32 , a spacing adjusting section 33 , and an emission angle adjusting section 34 .

[0097] The laser generating part 31 may include a light source that generates the fundamental laser beam Lb. The laser generating part 31 may generate the fundamental laser beam Lb and may transmit it to the laser dividing part 32 .

[0098] The laser splitter 32 can split the basic laser beam Lb generated by the laser generating unit 31 to form n or more laser beams L1 to Ln. n can be a natural number greater than 2. For example, the split laser beams L1 to Ln can include a first laser beam L1 and a second laser beam L2. The laser splitter 32 can split one basic laser beam Lb into a plurality of laser beams L1 to Ln and emit them simultaneously. The number of splits can be determined according to the number of nozzle units 20N.

[0099] The spacing adjustment unit 33 can adjust the spacing d between the divided laser beams L1 to Ln. The spacing d can be the distance between the adjacent laser beams L1 to Ln in a direction perpendicular to the laser traveling direction of the divided laser beams L1 to Ln. For example, the spacing adjustment unit 33 can adjust the spacing between the first laser beam L1 and the second laser beam L2. Accordingly, as described later, the laser beam L corresponding to each nozzle unit 20N can be emitted.

[0100] The emission angle adjustment unit 34 can adjust the emission angle θ of the laser beams L1 to Ln so that the paths of the plurality of laser beams L1 to Ln are parallel to each other. Here, the emission angle θ may be the angle of the laser beams L1 to Ln relative to the side from which the laser beams L1 to Ln are emitted from the emission angle adjustment unit 34. Figure 4 , the emission angle θ is 90 degrees, but it is not limited thereto. The emission angle adjustment unit 34 may be an F-θ lens that adjusts the angle by diffracting and refracting the laser beam L. For example, the emission angle adjustment unit 34 may adjust the emission angles of the first laser beam L1 and the second laser beam L2 so that the paths of the first laser beam L1 and the second laser beam L2 are parallel to each other.

[0101] By configuring the laser unit 30 as described above, even if only one laser generating section 31 is provided, a plurality of laser beams L can be simultaneously emitted. Therefore, when the display device manufacturing apparatus 1 is provided with a plurality of nozzle sections 20N, the laser beams L can be emitted in a manner corresponding to each nozzle section 20N, so that ink ejection failures in the plurality of nozzle sections 20N can be simultaneously inspected.

[0102] Figure 5a as well as Figure 5b is a cross-sectional view schematically illustrating a portion of a manufacturing apparatus for a display device according to an embodiment of the present invention. Figure 5a as well as Figure 5b Can correspond to Figures 1 to 3 A cross section taken along line V-V' in a manufacturing device for a display device.

[0103] Reference Figure 5aAt least two nozzles 20N may be arranged on the side of the head 20H of the ejection unit 20 facing the table 10. The nozzles 20N may be arranged in sequence along the y direction intersecting the x direction. Three dots indicate a state where the nozzles 20N are repeatedly arranged.

[0104] The nozzle portion 20N can eject ink toward the component S. When the nozzle portion 20N ejects ink normally, the path through which the ink droplets pass can be defined as an ejection path P. The ejection path P can be a linear path from the nozzle portion 20N to the coating target surface of the component S, and can have a predetermined angle with respect to the coating target surface, preferably, it can be the shortest straight line path (in this case, the angle is 90 degrees). Figure 5a In FIG. 1 , the ejection path P of each nozzle portion is schematically shown by a dotted arrow.

[0105] Reference Figure 5b , laser unit 30( Figure 1 ) can emit at least two laser beams L. Figure 5b In the figure, the cross section of the laser beam L is shown as a circle, but it is not limited thereto. The laser beam L may correspond to each nozzle portion 20N.

[0106] Ink may be ejected through the nozzle portion 20N while the laser beam L is continuously emitted through the laser unit 30. At least a portion of the path of the laser beam L may travel in the -x direction intersecting the arrangement direction of the nozzle portion 20N and may intersect the ejection path P of the nozzle portion 20N. At least a portion of the paths of the laser beams L may be parallel to each other.

[0107] Figure 6a as well as Figure 6b It is schematically shown Figure 5b A cross-sectional view of a portion of a manufacturing apparatus for a display device. Figure 6a as well as Figure 6b The figure shows a cross section of a display device manufacturing apparatus enlarged around a part of a nozzle portion.

[0108] Reference Figure 6a As described above, the manufacturing device 1 of the display device may include at least two nozzle units 20N arranged along the y direction. For example, it may include a first nozzle unit 20N1 and a second nozzle unit 20N2. The laser unit 30 ( Figure 1 ) can emit a first laser beam L1 and a second laser beam L2 corresponding to a first ejection path P1 of the first nozzle part 20N1 and a second ejection path P2 of the second nozzle part 20N2, respectively.

[0109] In the case where ink is ejected normally from the first nozzle portion 20N1, the first laser beam L1 may pass through the first ejection path P1 of the first nozzle portion 20N1 and through the droplets of ink ejected from the first nozzle portion 20N1. If the first laser beam L1 passes through the droplets of ink, the intensity of the first laser beam L1 may change. For example, a portion of the first laser beam L1 may be absorbed by the droplets of ink, and the intensity of the first laser beam L1 may become smaller. Therefore, in the case where ink is ejected normally by the first nozzle portion 20N1, the intensity of the first laser beam L1 may be reduced after passing through the first ejection path P1 compared to before passing through the first ejection path P1. It may be less than the intensity of the first laser beam L1. This is also applicable to the case of the second laser beam L2.

[0110] The sensor unit 40 can receive the first laser beam L1 passing through the first ejection path P1 and measure the intensity of the first laser beam L1. If the intensity of the first laser beam L1 is less than a predetermined reference value, the judgment unit 50 receiving the above-mentioned measurement result can judge that the first nozzle part 20N1 ejects well. The reference value, as a value regarding the intensity of the laser beam, can be determined by the user and can be less than or equal to the value of the intensity of the first laser beam L1 after being emitted from the laser unit 30. The reference value can be a reference for judging whether the ejection is poor or not. If the first laser beam L1 passes through the first ejection path P1 and passes through the droplets of ink ejected from the first nozzle part 20N1, the intensity of the first laser beam L1 can be less than the intensity after being emitted from the laser unit 30. Therefore, if the intensity of the first laser beam L1 measured by the sensor unit 40 is less than the predetermined intensity, it can mean that the ink ejection of the first nozzle part 20N1 is good. This also applies to the case of the second laser beam L2 in the same way.

[0111] In contrast to the case where the first nozzle unit 20N1 ejects ink normally, Figure 6b The figure shows a situation where the second nozzle unit 20N2 cannot eject ink normally. In this case, the first laser beam L1 can pass through the first ejection path P1 of the first nozzle unit 20N1 and pass through the ink droplets. The intensity of the first laser beam L1 can be reduced after passing through the first ejection path P1 compared to before passing through the first ejection path P1.

[0112] However, the second laser beam L2 passes through the second ejection path P2 of the second nozzle portion 20N2, and may not pass through the ink droplets. Therefore, the intensity of the second laser beam L2 may be substantially the same before and after passing through the second ejection path P2. Finally, the intensity of the second laser beam L2 may be above the reference value. The sensor unit 40 may receive the second laser beam L2 passing through the second ejection path P2 and measure its intensity. If the intensity of the second laser beam L2 is above a predetermined reference value, the judgment unit 50 receiving the above measurement result may judge that the ejection of the second nozzle portion 20N2 is poor.

[0113] Although, in Figure 6b The figure shows a case where only the second nozzle unit 20N2 has a discharge failure. However, as described above, if the intensity of the first laser beam L1 is equal to or greater than a predetermined reference value, it can be determined that the discharge failure occurs in the first nozzle unit 20N1.

[0114] When ink is ejected to coat a specific layer on a component S, if poor ink ejection occurs (e.g., ink is not ejected), the ink will not be applied to the desired area on the component S, which may result in poor product quality. However, according to an embodiment of the present invention, poor ink ejection can be checked in real time during the ink ejection process, so that it can be determined in time whether poor ink ejection occurs. Therefore, when it is determined that the ink is not ejected in the above process, feedback is given to execute the ejection process again, thereby reducing poor product quality and improving product productivity.

[0115] As a comparative example, compared to the situation where the coating state is checked after the ink ejection process is completely completed or the ejection is interrupted and checked during the ink ejection process, according to one embodiment of the present invention, the ejection does not need to be interrupted and real-time feedback can be provided, thereby enabling effective process execution. Furthermore, it is easy to confirm whether the ejection unit 20 has a fault, which also has advantages in terms of equipment maintenance.

[0116] Furthermore, according to the embodiment of the present invention, by using a plurality of laser beams L corresponding to the nozzle units 20N and traveling in a direction intersecting the arrangement direction of the nozzle units 20N, it is possible to simultaneously inspect whether each of the plurality of nozzle units 20N has ejection defects. This can minimize the time required for inspection.

[0117] Figure 7 is a cross-sectional view schematically showing a part of a manufacturing apparatus of a display device according to still another embodiment of the present invention. Figures 8a to 8c It is schematically shown Figure 7 A cross-sectional view of a portion of a manufacturing apparatus for a display device may correspond to Figure 7 Region VIII.

[0118] Reference Figure 7 , laser unit 30( Figure 1 ) may emit at least two laser beams L. The emitted laser beams L may include a laser beam L corresponding to the nozzle portion 20N and a laser beam L corresponding to an area between the nozzle portions 20N. Also, the emitted laser beams L may include a laser beam L corresponding to an area outside each nozzle portion 20N arranged at the outermost side of the head portion 20H.

[0119] At least a portion of the path of the laser beam L may travel in the -x direction. The laser beam L corresponding to the nozzle portion 20N may intersect the ejection path P of the nozzle portion 20N. The laser beam L corresponding to the area between the nozzle portions 20N may pass between the ejection paths P.

[0120] Figures 8a to 8c The figure shows a cross section of the display device manufacturing apparatus enlarged around a part of the nozzle portion 20N.

[0121] Reference Figure 8a As described above, the manufacturing apparatus 1 of the display device may include at least two nozzle units 20N arranged along the y direction, for example, may include a first nozzle unit 20N1 and a second nozzle unit 20N2. The laser unit 30 ( Figure 1 ) can emit a first laser beam L1 and a second laser beam L2 corresponding to a first ejection path P1 of the first nozzle part 20N1 and a second ejection path P2 of the second nozzle part 20N2, respectively.

[0122] Furthermore, the laser unit 30 may further emit the following: a third laser beam L3 corresponding to the first area A1 located on one side of the first ejection path P1; a fourth laser beam L4 corresponding to the second area A2 located between the first ejection path P1 and the second ejection path P2; and a fifth laser beam L5 corresponding to the third area A3 located on one side of the second ejection path P2. In this case, the first area A1 may be located on the opposite side of the second area A2 with the first ejection path P1 interposed therebetween, and the third area may be located on the opposite side of the second area A2 with the second ejection path P2 interposed therebetween.

[0123] The first area A1 may be an area between two adjacent nozzle parts including the first nozzle part 20N1, and the third area A3 may be an area between two adjacent nozzle parts including the second nozzle part 20N2. Figure 1 ) is an area outside each outermost nozzle portion 20N.

[0124] At least a portion of the path of the first laser beam L1 may intersect with the first ejection path P1 of the first nozzle unit 20N1, and at least a portion of the path of the second laser beam L2 may intersect with the second ejection path P2 of the second nozzle unit 20N2. Furthermore, at least a portion of the path of the third laser beam L3 may pass through the first area A1, at least a portion of the path of the fourth laser beam L4 may pass through the second area A2, and at least a portion of the path of the fifth laser beam L5 may pass through the third area A3.

[0125] like Figure 8aAs shown, when the ink is ejected normally from the first nozzle portion 20N1 and the second nozzle portion 20N2, the first laser beam L1 and the second laser beam L2 may pass through the droplets of ink ejected through the first ejection path P1 and the second ejection path P2, respectively. Accordingly, the intensity of the first laser beam L1 and the second laser beam L2 may change. On the contrary, the third laser beam L3, the fourth laser beam L4, and the fifth laser beam L5 may pass through the first area A1, the second area A2, and the third area A3, respectively, without passing through the droplets of ink. Therefore, the intensity of the third to fifth laser beams L3, L4, and L5 may be substantially the same before and after passing through the first to third areas A1, A2, and A3.

[0126] In contrast to the case where the first nozzle unit 20N1 ejects ink normally, Figure 8b The second nozzle unit 20N2 is shown in the figure as being unable to eject ink. In this case, the first laser beam L1 may pass through the ink droplets while passing through the first ejection path P1. The intensity of the first laser beam L1 may be reduced after passing through the first ejection path P1 compared to before passing through the first ejection path P1.

[0127] However, the second laser beam L2 may pass through the second ejection path P2 without passing through the ink droplets. Therefore, the intensity of the second laser beam L2 may be substantially the same before and after passing through the second ejection path P2.

[0128] Furthermore, the fourth laser beam L4 and the fifth laser beam L5 passing through the areas on both sides of the second laser beam L2 may pass through the second area A2 and the third area A3 respectively, and may not pass through the ink droplets. Therefore, the intensities of the fourth laser beam L4 and the fifth laser beam L5 may be substantially the same before and after passing through the second area A2 and the third area A3.

[0129] The sensor unit 40 can receive the first to fifth laser beams L1, L2, L3, L4, L5 and measure their intensities, and the judgment unit 50 can receive the above measurement results and judge the ejection failure based on them. For example, if the intensity of the second laser beam L2 and the intensities of the fourth laser beam L4 and the fifth laser beam L5 on both sides of the second laser beam L2 are all above the reference value, it can be determined that the second nozzle part 20N2 is defective due to non-ejection.

[0130] Although, Figure 8b The figure shows that only the second nozzle unit 20N2 has a defective ejection due to non-ejection, but the first nozzle unit 20N1 may also have a defective ejection due to non-ejection. In this case, similar to the above, if the intensity of the first laser beam L1 and the intensities of the third laser beam L3 and the fourth laser beam L4 on both sides of the first laser beam L1 are all above the reference value, it can be determined that the first nozzle unit 20N1 is defective due to non-ejection.

[0131] In contrast to the case where the first nozzle unit 20N1 ejects ink normally, Figure 8c The figure shows a situation where the second nozzle unit 20N2 cannot eject ink in a required direction (ejection angle defect).

[0132] In this case, the first laser beam L1 may meet the droplet of ink through the first ejection path P1. The intensity of the first laser beam L1 may be respectively reduced after passing through the first ejection path P1 compared to before passing through the first ejection path P1.

[0133] However, the second laser beam L2 may pass through the second ejection path P2 without passing through the droplets of ink. Therefore, the intensity of the second laser beam L2 may be substantially the same before and after passing through the second ejection path P2.

[0134] In addition, as the ink is ejected from the second nozzle portion 20N2 in an unwanted direction, the ink droplets may pass through the second area A2 or the third area A3. At this time, the fourth laser beam L4 or the fifth laser beam L5 may pass through the second area A2 or the third area A3 and meet the ink droplets. In this case, the intensity of the fourth laser beam L4 or the fifth laser beam L5 may change, for example, a portion of the fourth laser beam L4 or the fifth laser beam L5 is absorbed by the ink droplets, and the intensity of the fourth laser beam L4 or the fifth laser beam L5 may become smaller. For the sake of convenience, the following description is directed to a situation in which the ink droplets pass through the second area A2 due to a poor ejection angle of the second nozzle portion 20N2.

[0135] The third laser beam L3 and the fifth laser beam L5 may pass through the first area A1 and the third area A3 respectively without passing through the ink droplets. Therefore, the intensities of the third laser beam L3 and the fifth laser beam L5 may be substantially the same before and after passing through the first area A1 and the third area A3.

[0136] The sensor unit 40 can receive the first to fifth laser beams L1, L2, L3, L4, and L5 and measure their intensities, and the judgment unit 50 can receive the above measurement results and can judge the ejection failure based on them. For example, if the intensity of the second laser beam L2 is above the reference value, and any one of the intensity of the fourth laser beam L4 and the intensity of the fifth laser beam L5 is less than the reference value, it can be determined that the ejection angle of the second nozzle part 20N2 is poor. As another example, if the intensity of the first laser beam L1 is above the reference value, and any one of the intensity of the third laser beam L3 and the intensity of the fourth laser beam L4 is less than the reference value, it can be determined that the ejection angle of the first nozzle part 20N1 is poor.

[0137] According to this, not only the poor ejection caused by the non-ejection of ink of the nozzle part 20N can be checked, but also the poor ejection caused by the poor ejection angle of the ink can be checked. If the poor ejection angle of the ink occurs, the ink may not be fully applied to the required area on the component S, which may result in poor product quality. According to one embodiment of the present invention, the poor ejection angle of the ink is checked in real time during the ink ejection process, so that the production quality of the product can be improved.

[0138] Fig. 9 is a cross-sectional view schematically illustrating a portion of a manufacturing apparatus for a display device according to still another embodiment of the present invention. Fig. 9 Can be with Figures 1 to 3 The manufacturing device of the display device corresponds to the cross section taken along the V-V' line. Figure 5a as well as Figure 5b The contents described below have the same structure, and the differences are mainly described below.

[0139] Reference Fig. 9 , laser unit 30( Figure 1 ) can emit a line-shaped laser beam L extending in the y direction. For example, the laser unit 30 can transform the point-shaped laser beam generated by the laser generating unit 31 into a line-shaped laser beam L by using an optical device such as a lens and emit the laser beam.

[0140] The linear laser beam L emitted by the laser unit 30 may correspond to at least two nozzle portions 20N at the same time, and may correspond to the area between the nozzle portions 20N at the same time. At least a portion of the path of the linear laser beam L may travel along the -x direction, and may intersect at least two ejection paths P at the same time.

[0141] Fig.10 It is a schematic diagram Fig. 9 A cross-sectional view of a portion of a manufacturing apparatus of a display device, and can be Fig. 9 The X area corresponds to.

[0142] Reference Fig.10 As described above, the manufacturing apparatus 1 of the display device may include at least two nozzle portions 20N arranged along the y direction, for example, may include a first nozzle portion 20N1 and a second nozzle portion 20N2.

[0143] By laser unit 30 ( Figure 1) can correspond to the first ejection path P1 of the first nozzle unit 20N1 and the second ejection path P2 of the second nozzle unit 20N2 at the same time. And, it can correspond to the first area A1 located on one side of the first ejection path P1, the second area A2 located between the first ejection path P1 and the second ejection path P2, and the third area A3 located on one side of the second ejection path P2 at the same time. In this case, the first area A1 can be located on the opposite side of the second area A2 by placing the first ejection path P1 therebetween, and the third area A3 can be located on the opposite side of the second area A2 by placing the second ejection path P2 therebetween. The first area A1 can be an area between two adjacent nozzle units including the first nozzle unit 20N1, and the third area A3 can be an area between two adjacent nozzle units including the second nozzle unit 20N2.

[0144] At least a portion of the path of the linear laser beam L may simultaneously pass through the first ejection path P1 , the second ejection path P2 , the first area A1 , the second area A2 , and the third area A3 .

[0145] The sensor unit 40 may receive the linear laser beam L. The sensor unit 40 may measure the first intensity and the second intensity of the portions corresponding to the first ejection path P1 and the second ejection path P2 in the laser beam L. Furthermore, the sensor unit 40 may measure the third to fifth intensities of the portions corresponding to the first to third areas A1, A2, and A3 in the laser beam L. The judgment unit 50 may receive the above measurement results and judge the ejection failure based on the results.

[0146] With previous reference Figures 8a to 8c The method of description is similar. If the first intensity, the third intensity and the fourth intensity are all above the reference value, it is determined that the first nozzle part 20N1 has a poor ejection due to non-ejection. If the second intensity, the fourth intensity and the fifth intensity are all above the reference value, it is determined that the second nozzle part 20N2 has a poor ejection due to non-ejection.

[0147] Furthermore, if the first intensity is greater than the reference value and any one of the third intensity and the fourth intensity is less than the reference value, it can be determined that the ejection angle of the first nozzle unit 20N1 is defective. If the second intensity is greater than the reference value and any one of the fourth intensity and the fifth intensity is less than the reference value, it can be determined that the ejection angle of the second nozzle unit 20N2 is defective.

[0148] As a comparative example, when a plurality of laser beams in a dot form are used, an alignment problem between the laser beams and the nozzle portion can be expected. However, according to an embodiment of the present invention, when a laser beam L in a line form is used, the alignment problem can be eliminated.

[0149] Although the present invention is described with reference to the embodiments shown in the accompanying drawings, they are only exemplary, and a person skilled in the art with ordinary knowledge in the art will understand that various modifications and other equivalent embodiments can be implemented accordingly. Therefore, the true technical protection scope of the present invention should be determined according to the technical ideas of the claims recorded.

Claims

1. A manufacturing device for a display device, comprising: The tabletop is used to place the components; an ejection unit including a head, a first nozzle unit, and a second nozzle unit, wherein the head can reciprocate along a first direction on the table, the first nozzle unit and the second nozzle unit are arranged on one side of the head along a second direction intersecting the first direction, and eject ink toward the component; a laser unit that emits a plurality of laser beams including at least a first laser beam and a second laser beam corresponding to the first nozzle portion and the second nozzle portion, respectively; a sensor unit that receives the plurality of laser beams and measures the intensity of each of the plurality of laser beams; and a judgment unit that judges whether the ejection of the ink is defective based on the measurement result of the intensity, wherein the paths of the plurality of laser beams pass through a first ejection path of the first nozzle portion, a second ejection path of the second nozzle portion, a first region located on one side of the first ejection path, a second region located between the first ejection path and the second ejection path, and a third region located on one side of the second ejection path, The first region is located on the opposite side of the second region with the first ejection path interposed therebetween, and the third region is located on the opposite side of the second region with the second ejection path interposed therebetween. The plurality of laser beams further include a third laser beam, a fourth laser beam, and a fifth laser beam corresponding to the first region, the second region, and the third region, respectively.

2. The manufacturing device of the display device according to claim 1, wherein: The laser unit includes a spacing adjustment portion for adjusting the spacing between the plurality of laser beams.

3. The manufacturing device of a display device according to claim 1, wherein: The laser unit includes an emission angle adjustment portion that adjusts emission angles of the plurality of laser beams so that paths of the plurality of laser beams are parallel to each other.

4. The manufacturing apparatus of a display device according to claim 1, wherein: The emission position of the laser unit and the light receiving position of the sensor unit are arranged on the same plane.

5. The manufacturing device of the display device according to claim 4, wherein: The same plane is located between the ejection unit and the component.

6. The manufacturing device of the display device according to claim 1, further comprising: The first driving unit and the second driving unit respectively move the laser unit and the sensor unit up and down.

7. The manufacturing device of the display device according to claim 1, further comprising: a mirror to adjust the paths of the plurality of laser beams; as well as The third driving unit moves the mirror up and down.

8. The manufacturing apparatus of a display device according to claim 1, wherein: The laser unit is arranged on the stage, and emits the plurality of laser beams toward a first surface of the stage on which the component is placed.

9. The manufacturing apparatus of a display device according to claim 1, wherein: The plurality of laser beams are implemented as line-shaped laser beams extending along the second direction.

10. A method for manufacturing a display device, comprising the following steps: Prepare components on countertop; The first nozzle section and the second nozzle section arranged in a first direction spray ink onto the component; Generate a base laser beam; Splitting the basic laser beam into a first laser beam and a second laser beam corresponding to a first ejection path of the first nozzle portion and a second ejection path of the second nozzle portion, respectively, a third laser beam corresponding to a first area located on one side of the first ejection path, a fourth laser beam corresponding to a second area located between the first ejection path and the second ejection path, and a fifth laser beam corresponding to a third area located on one side of the second ejection path, and emitting the split laser beam; The first laser beam and the second laser beam intersect the first ejection path and the second ejection path respectively, and the third laser beam to the fifth laser beam pass through the first area to the third area respectively; receiving the first laser beam to the fifth laser beam and measuring the respective intensities; and The ejection failure of each of the first nozzle unit and the second nozzle unit is determined based on the intensities of the first to fifth laser beams.

11. The method for manufacturing a display device according to claim 10, further comprising the following steps: The steps of determining the ejection failure include: If the intensity of each of the first laser beam and the second laser beam is equal to or greater than a predetermined reference value, it is determined that each of the first nozzle unit and the second nozzle unit has ejection failure.

12. The method for manufacturing a display device according to claim 10, further comprising the following steps: Paths of the first to fifth laser beams are adjusted so that the first to fifth laser beams travel toward between the component and the first and second nozzle portions.

13. The method for manufacturing a display device according to claim 10, wherein: The step of emitting the first laser beam to the fifth laser beam comprises the following steps: adjusting the intervals between the first laser beam to the fifth laser beam; and The emission angles of the first laser beam to the fifth laser beam are respectively adjusted so that the paths of the first laser beam to the fifth laser beam are parallel to each other.

14. The method for manufacturing a display device according to claim 12, wherein: The step of determining the ejection failure comprises the following steps: If the intensities of the first laser beam, the third laser beam, and the fourth laser beam are all greater than a reference value, it is determined that the first nozzle unit is defective due to non-ejection; as well as If the intensities of the second laser beam, the fourth laser beam, and the fifth laser beam are all equal to or greater than a reference value, it is determined that the second nozzle unit is defective due to non-discharge.

15. The method for manufacturing a display device according to claim 14, wherein: The step of determining the ejection failure further includes the following steps: If the intensity of the first laser beam is greater than or equal to a reference value, and any one of the intensity of the third laser beam and the intensity of the fourth laser beam is less than the reference value, it is determined that the ejection angle of the first nozzle portion is defective; If the intensity of the second laser beam is equal to or greater than a reference value and any one of the intensities of the fourth laser beam and the fifth laser beam is less than the reference value, it is determined that the ejection angle of the second nozzle unit is defective.

16. A method for manufacturing a display device, comprising the following steps: Prepare components on countertop; The first nozzle section and the second nozzle section arranged in a first direction spray ink onto the component; emitting a line-shaped laser beam extending in the first direction and including portions corresponding to a first ejection path of the first nozzle portion, a second ejection path of the second nozzle portion, a first area located on one side of the first ejection path, a second area located between the first ejection path and the second ejection path, and a third area located on one side of the second ejection path; receiving the laser beams at respective portions corresponding to the first ejection path, the second ejection path, and the first region to the third region to measure the intensity; as well as Whether or not ejection from each of the first nozzle unit and the second nozzle unit is defective is determined based on the measured intensity of the laser beam.

17. The method for manufacturing a display device according to claim 16, wherein: The step of measuring the intensity comprises the following steps: measuring a first intensity and a second intensity of a portion of the laser beam corresponding to the first ejection path and the second ejection path, respectively; and A third intensity, a fourth intensity, and a fifth intensity of each of the portions of the laser beam corresponding to the first region to the third region are measured.

18. The method for manufacturing a display device according to claim 17, wherein: The step of judging whether the ejection is defective comprises the following steps: If the first intensity, the third intensity, and the fourth intensity are all greater than a reference value, it is determined that the first nozzle unit is defective due to non-ejection; as well as If the second intensity, the fourth intensity, and the fifth intensity are all equal to or greater than a reference value, it is determined that the second nozzle unit is defective due to non-discharging.

19. The method for manufacturing a display device according to claim 17, wherein: The step of determining the ejection failure comprises the following steps: If the first intensity is greater than or equal to a reference value, and any one of the third intensity and the fourth intensity is less than the reference value, it is determined that the ejection angle of the first nozzle portion is defective; as well as If the second intensity is equal to or greater than a reference value and if any one of the fourth intensity and the fifth intensity is less than the reference value, it is determined that the ejection angle of the second nozzle unit is defective.

Images