Light irradiation module and printing apparatus including same

Abstract

The utility model relates to a light irradiation module and a printing device comprising the same. According to one embodiment of the utility model, the light irradiation module comprises the components of a workbench which is used for placing a substrate and a coating layer configured on the substrate and moves in a first direction; a main body disposed above the table; a light-emitting element disposed in the center of the main body so as to irradiate light to the stage; a first suction tube disposed adjacent to the light-emitting element in a second direction crossing the first direction; the pipeline is connected to the first suction pipe; and a suction pump which is connected to the duct and supplies a negative pressure to the first suction pipe, the negative pressure having an absolute value proportional to the intensity of the light.

Description

Technical Field

[0001] The utility model relates to a light irradiation module and a printing device comprising the same, and more particularly to a light irradiation module comprising a suction tube and a suction pump and a printing device comprising the same. Background Art

[0002] Electronic devices such as mobile communication terminals, digital cameras, notebooks, monitors, and TVs include a display device for displaying images.

[0003] The display device includes a display panel for generating and displaying an image and a window panel configured above the display panel to protect the display panel. The window panel is attached to the top of the display panel. The image generated in the display panel can be provided to the observer through the window panel.

[0004] In addition, the overall thickness of the display device is minimized, and the form panel and the display panel are manufactured in a state of adhesion to facilitate the assembly process of the kit. In the bonding of the display panel and the form panel, a method of bonding them uniformly with a thin thickness can be used in various ways such as rod coating and gap coating. At this time, the overall thickness of the display device can be minimized by making it uniform in the coating adhesive with a thin thickness. Utility Model Content

[0005] The utility model aims to provide a light irradiation module including a suction pump and a suction tube, and a printing device including the same.

[0006] It can be that the light irradiation module according to an embodiment of the utility model includes: a workbench, on which a substrate and a coating arranged on the substrate are placed, and which moves in a first direction; a main body, which is arranged above the workbench; a light-emitting element, which is arranged in the center of the main body and irradiates light to the workbench; a first suction tube, which is arranged adjacent to the light-emitting element in a second direction transverse to the first direction; a pipe, which is connected to the first suction tube; and a suction pump, which is connected to the pipe and provides a negative pressure (negative pressure) having an absolute value proportional to the intensity of the light to the first suction tube.

[0007] It may be that a plurality of the first suction pipes are provided, and the first suction pipes include: a 1-1 suction pipe arranged adjacent to one side of the light emitting element in the second direction; and a 1-2 suction pipe arranged adjacent to the other side of the light emitting element in the second direction.

[0008] The 1-1 suction tube and the 1-2 suction tube may be arranged to face each other with the light emitting element interposed therebetween.

[0009] It can be that the light irradiation module according to an embodiment of the present invention also includes: a control unit, which is connected to the light emitting element and the suction pump, and sends an output signal for the negative pressure proportional to the input signal to the suction pump based on the input signal received from the light emitting element.

[0010] It may be that the control unit receives the thickness of the coating as an initial input value, and if the initial input value increases, changes the output signal so that the absolute value of the negative pressure corresponding to the output signal increases.

[0011] It may be that the control unit receives the volatility of the coating as an initial input value, and if the initial input value increases, changes the output signal so that the absolute value of the negative pressure corresponding to the output signal increases.

[0012] It may be that the diameter of the first suction pipe becomes smaller as it is farther away from the pipeline.

[0013] It may be that the light irradiation module according to an embodiment of the present invention further includes: a temperature sensor connected to the control unit and measuring the temperature of the substrate.

[0014] It may be that the control unit adjusts the output signal based on the temperature measured by the temperature sensor.

[0015] The temperature sensor may include: a first temperature sensor coupled to the top of the workbench and in contact with the substrate to measure the temperature of the substrate; and a second temperature sensor configured to be separated from the workbench and measure the temperature of the substrate and the coating without contacting the substrate.

[0016] It can be that the light irradiation module according to an embodiment of the utility model also includes: a second suction tube, which is arranged adjacent to the light emitting element in the first direction, and a plurality of second suction tubes are provided, and the second suction tubes include: a 2-1 suction tube and a 2-2 suction tube, and the 2-1 suction tube and the 2-2 suction tube are separated by the light emitting element and arranged relatively along the first direction.

[0017] The width of the 1-1 suction duct along the second direction may be greater than the width of the 2-1 suction duct along the first direction.

[0018] It may be that the light irradiation module according to an embodiment of the present invention further includes: a heater coupled to at least one of the periphery of the pipeline and the periphery of the first suction pipe.

[0019] It may be that a plurality of heaters are provided, and the heaters include: a first heater coupled to an area of ​​the outer side surface of the pipe to provide heat to the pipe; and a second heater surrounding the outer side surface of the first suction pipe and providing heat to the first suction pipe.

[0020] Alternatively, the light irradiation module according to an embodiment of the present invention further includes: a moving unit, which is combined between the pipeline and the first suction tube and moves the position of the first suction tube according to the shape of the coating.

[0021] The light emitting element and the suction pump may start operating at the same time.

[0022] It may be that a printing device according to an embodiment of the utility model includes: a workbench, on which a substrate is placed and which moves in a first direction; a light irradiation module, which is arranged above the workbench and irradiates light to the workbench; and a printing head, which is arranged above the workbench and is arranged behind the light irradiation module with the first direction as a reference, and applies a coating liquid on the substrate to form a coating, wherein the light irradiation module includes: a main body, which is arranged above the workbench; a light emitting element, which is arranged in the center of the main body and irradiates light to the workbench; a suction tube, which is arranged adjacent to the light emitting element in a second direction transverse to the first direction; a pipe, which is connected to the suction tube; and a suction pump, which is connected to the pipe and provides a negative pressure having an absolute value proportional to the intensity of the light to the suction tube.

[0023] The printing head and the light irradiation module may be spaced apart from each other by a distance of less than 200 mm along the first direction.

[0024] The suction pipe may be provided in plurality, and the suction pipe may include: a first suction pipe disposed adjacent to one side of the light emitting element in the second direction; and a second suction pipe disposed adjacent to the other side of the light emitting element in the second direction.

[0025] The absolute value of the negative pressure of the suction pump may increase as the thickness of the coating increases.

[0026] According to an embodiment of the present invention, the light irradiation module and the printing device including the same may include a suction pump and a suction pipe adjacent to the light emitting element to remove the vaporized coating liquid generated during the coating curing process.

[0027] In addition, according to an embodiment of the present invention, the magnitude of the negative pressure of the suction pump of the light irradiation module and the printing device including the same is proportional to the intensity of light, so the exhaust pressure can be actively controlled according to the intensity of light. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional diagram of a printing device according to an embodiment of the utility model.

[0029] Figure 2 It is a bottom view of a light irradiation module and a printing head according to an embodiment of the present invention.

[0030] Figure 3 It is a side view of a light irradiation module according to an embodiment of the present utility model.

[0031] Figure 4a as well as Figure 4b is a photograph showing a coating and a hole according to an embodiment of the present invention.

[0032] Figure 5 It is a side view of a light irradiation module according to an embodiment of the present utility model.

[0033] Figure 6 It is a three-dimensional diagram of a printing device according to an embodiment of the utility model.

[0034] Figure 7 It is a bottom view of a light irradiation module and a printing head according to an embodiment of the present invention.

[0035] Figure 8 It is a three-dimensional diagram of a printing device according to an embodiment of the utility model.

[0036] Fig. 9 It is a side view of a light irradiation module according to an embodiment of the present utility model.

[0037] Figures 10a to 10c This is a front view showing the operation of the printing device according to one embodiment of the present invention.

[0038] Fig.11 It is an exploded perspective view schematically showing a display device.

[0039] (Explanation of Reference Numerals)

[0040] 10: Printing device

[0041] 100: Light irradiation module

[0042] 110: Main body

[0043] 120: Light emitting element

[0044] 130: Exhaust unit

[0045] 131: Suction pump

[0046] 132: Pipeline

[0047] 133: Suction tube

[0048] 140: Control unit

[0049] 150: Temperature sensor

[0050] 160: Heater

[0051] 170: Mobile unit

[0052] ST: Workbench

[0053] 200: Printing head

[0054] 210: Printing body

[0055] 220: Nozzle

[0056] RE: Coating

[0057] FU: Gas

[0058] DD: Display Device

[0059] DP: Display Panel

[0060] ADS: Adhesion layer

[0061] BL: Light-shielding layer DETAILED DESCRIPTION

[0062] In this specification, when it is mentioned that any constituent element (or region, layer, part, etc.) is "on" other constituent elements, "connected to" or "combined to" other constituent elements, it means that any constituent element can be directly configured / connected / combined to other constituent elements or a third constituent element can be configured between them.

[0063] The same reference numerals refer to the same components. In addition, in the drawings, the thickness, proportion and size of the components are exaggerated for the effective description of the technical content. "And / or" includes all combinations that can be defined by the associated components.

[0064] The terms "first", "second" and the like may be used to describe various constituent elements, but the constituent elements are not limited by the terms. The terms are used only for the purpose of distinguishing one constituent element from other constituent elements. For example, without departing from the scope of the invention, the first constituent element may be named as the second constituent element, and similarly, the second constituent element may be named as the first constituent element. Singular expressions include plural expressions unless otherwise expressly indicated in the context.

[0065] In addition, terms such as “below”, “lower side”, “above”, and “upper side” are used to explain the relationship between components shown in the drawings. These terms are relative concepts and are explained based on the directions shown in the drawings.

[0066] The terms "including" or "having" should be understood as being used to specify the existence of the features, numbers, steps, tasks, constituent elements, parts or their combinations recorded in the specification, and do not preclude the existence or additional possibilities of one or more other features or numbers, steps, tasks, constituent elements, parts or their combinations.

[0067] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this specification have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs. In addition, terms such as terms defined in commonly used dictionaries should be interpreted as having the same meanings as those in the context of the relevant technology, and should not be interpreted as too idealistic or too formalistic unless explicitly defined herein.

[0068] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0069] Figure 1 It is a three-dimensional diagram of a printing device 10 according to an embodiment of the present invention. Figure 2 It is a bottom view of the light irradiation module 100 and the printing head 200 according to an embodiment of the present invention. Figure 2 is Figure 1 A bottom view of the light irradiation module 100 and the printing head 200 as viewed in the A direction.

[0070] Reference Figure 1 as well as Figure 2 The printing device 10 may include a light irradiation module 100 and a printing head 200. The printing device 10 may continuously perform the steps of applying the coating liquid on the substrate as the operation object and curing the applied coating liquid. The printing device 10 may immediately cure the applied coating liquid and shorten the time required for the process.

[0071] The printing device 10 can be Fig.11 The adhesive layer ADS of the display device DD (refer to Fig.11 ) and the light shielding layer BL (refer to Fig.11 ) is used for coating of the coating liquid and manufacturing of the structure required for the curing process. For example, when using an optically clear resin (OCR) as the coating liquid, it can be formed Fig.11 Adhesive layer ADS (refer to Fig.11 ). For example, when a light-shielding substance is used as a coating liquid, a Fig.11 The light shielding layer BL (refer to Fig.11 ). However, the structure that can be manufactured by such a printing device 10 is not limited thereto, and all structures that are subjected to coating and curing of a coating liquid can be manufactured.

[0072] The light irradiation module 100 may include a workbench ST, a main body 110, a light emitting element 120, an exhaust unit 130, a control unit 140, and a temperature sensor 150. The light irradiation module 100 may irradiate light L onto Figure 3 Substrate WS (refer to Figure 3 ) to cure the coating RE (refer to Figure 3 ). The light irradiation module 100 may be arranged in front of the printing head 200 with reference to the first direction DR1. The light irradiation module 100 may be spaced apart from the top of the workbench ST by a predetermined distance along the third direction DR3. A person having ordinary knowledge in the technical field related to the present embodiment may understand that the structure of the light irradiation module 100 is not limited thereto, and other common components may be included in the light irradiation module 100.

[0073] The workbench ST can be used to place the substrate WS (refer to Figure 3 ) and configured on the substrate WS (refer to Figure 3 ) on the coating RE (refer to Figure 3 ) flat plate. The shape and size of the workbench ST on the plane can be unlimited. However, Figure 1 The workbench ST is shown as a quadrilateral in the plane as an example. The workbench ST can provide a substrate WS for placement (refer to Figure 3 ) space.

[0074] The work table ST can move in the first direction DR1. The work table ST moves in the first direction DR1, so that the substrate WS (see Figure 3 ) can be overlapped with the light irradiation module 100 after being overlapped with the printing head 200. Figure 3 ) can be overlapped with the printing head 200 to perform the coating liquid coating process. Figure 3 ) can perform the coating liquid curing process when it overlaps with the light irradiation module 100. That is, the workbench ST can move in the first direction DR1 and on the substrate WS (refer to Figure 3 )The coating process and the curing process are carried out in a continuous manner.

[0075] The plane area occupied by the worktable ST can be larger than that of the substrate WS (refer to Figure 3The worktable ST may have durability and heat resistance so as not to be damaged by the light L irradiated by the light emitting element 120 and include a substance with low reactivity so as not to react even at high temperature.

[0076] The main body 110 may be disposed above the workbench ST. The light emitting element 120 may be disposed in the center of the main body 110 to irradiate the light L to the workbench ST. The light emitting element 120 may be a lamp for irradiating the light L. However, the light emitting element 120 is not only the light emitting element 120 itself for irradiating the light L, but may also be used as a unit for emitting light. A plurality of light emitting elements 120 may be provided as needed. The light emitting element 120 may include a plurality of light sources spaced apart from each other in a second direction DR2 intersecting the first direction DR1.

[0077] The light L irradiated from the light emitting element 120 may be used to cure the coating RE (see Figure 3 ) of ultraviolet light. The light L irradiated from the light emitting element 120 may be ultraviolet light having a wavelength of 10 nm to 400 nm. The light L may be ultraviolet light having a wavelength of 150 mW / cm 2 Up to 2000mW / cm 2 The intensity of ultraviolet rays.

[0078] The exhaust unit 130 may be disposed above the workbench ST to suck the surrounding air. The exhaust unit 130 may suck foreign matter and gas FU (see Figure 3 The exhaust unit 130 may provide a negative pressure having an absolute value proportional to the intensity of the light L. The exhaust unit 130 may be a vacuum regulator or a pressure regulator that changes the negative pressure according to the intensity of the light L. However, the type of the exhaust unit 130 is not limited to the aforementioned and may be provided by any device that can provide a negative pressure having an absolute value proportional to the intensity of the light L.

[0079] The exhaust unit 130 may include a suction pump 131, a pipe 132, and a suction pipe 133. However, the structure of the exhaust unit 130 is not limited thereto and may include other general structures. The suction pump 131 may be connected to the pipe 132 to provide the suction pipe 133 with a negative pressure having an absolute value proportional to the intensity of the light L. The suction pump 131 may start working at the same time as the light emitting element 120. The suction pump 131 may be connected to the control unit 140 and determine the negative pressure based on an output signal received from the control unit 140.

[0080] The pipe 132 is connected to the suction pipe 133 and can be used to suck air, foreign matter and gas FU (see Figure 3 ). The pipe 132 may be connected between the suction pipe 133 and the suction pump 131. The pipe 132 may transfer the negative pressure provided by the suction pump 131 to the suction pipe 133. The pipe 132 may be in the shape of a tube with an empty interior. The pipe 132 may include a suction pipe 132a and a connecting pipe 132b.

[0081] The suction pipe 132a may be a pipe directly connected to the suction pipe 133. In the case where a plurality of suction pipes 133 are provided, the suction pipe 132a may be connected to each of the plurality of suction pipes. The suction pipe 132a may have a plurality of branched ends so as to be connected to each of the plurality of suction pipes 133. For example, referring to Figure 3 The suction pipe 132a can be branched into two paths, and one end is connected to the 1-1 suction pipe 133a, and the other end is connected to the 1-2 suction pipe 133b.

[0082] The connection pipe 132b may be connected between the suction pipe 132a and the suction pump 131. The exhaust pressure of the suction pump 131 may be transferred to the suction pipe 133 through the connection pipe 132b and the suction pipe 132a.

[0083] The suction pipe 133 may be arranged adjacent to the light emitting element 120 in the second direction DR2 that crosses the first direction DR1. The suction pipe 133 may be combined with the main body 110 and arranged adjacent to the side of the light emitting element 120 along the second direction DR2. The suction pipe 133 may protrude from the main body 110 toward the workbench ST. The suction pipe 133 may be arranged adjacent to both side surfaces of the main body 110. The suction pipe 133 may be connected to the suction pump 131 through the pipe 132. The suction pipe 133 may capture foreign matter and gas FU in the working space by using the negative pressure transmitted by the suction pump 131 (refer to Figure 3 ).

[0084] The suction pipe 133 may include a 1-1 suction pipe 133a and a 1-2 suction pipe 133b. The 1-1 suction pipe 133a may be disposed adjacent to one side of the light emitting element 120 in the second direction DR2. The 1-2 suction pipe 133b may be disposed adjacent to the other side of the light emitting element 120 in the second direction DR2. The light emitting element 120 may be disposed between the 1-1 suction pipe 133a and the 1-2 suction pipe 133b. The 1-1 suction pipe 133a and the 1-2 suction pipe 133b may be disposed opposite to each other in the second direction DR2 with the light emitting element 120 interposed therebetween. Each of the 1-1 suction pipe 133a and the 1-2 suction pipe 133b may be connected to each of the ends of the suction duct 132a.

[0085] The 1-1st suction pipe 133a may be disposed adjacent to one side of the body 110 that is closer to the light emitting element 120 in the second direction DR2. The 1-2nd suction pipe 133b may be disposed adjacent to the other side of the body 110 that is closer to the light emitting element 120 in the second direction DR2. Thus, it is possible to minimize the light L emitted from the light emitting element 120 being blocked by the 1-1st suction pipe 133a and the 1-2nd suction pipe 133b.

[0086] The control unit 140 is connected to the light emitting element 120 and the suction pump 131, and may send an output signal to the suction pump 131 based on an input signal received from the light emitting element 120. The input signal of the control unit 140 may be a signal related to the intensity of the light L irradiated from the light emitting element 120. The output signal generated by the control unit 140 may be a signal related to the negative pressure provided by the suction pump 131. The output signal of the control unit 140 may be proportional to the input signal.

[0087] That is, the greater the intensity of the light L irradiated from the light emitting element 120, the greater the magnitude of the negative pressure provided by the suction pump 131 operated by the output signal. Thus, the absolute value of the negative pressure (Negative pressure) provided by the suction pump 131 may be proportional to the intensity of the light L irradiated from the light emitting element 120. The suction pump 131 may operate according to the output signal generated by the control unit 140.

[0088] The temperature sensor 150 may be connected to the control unit 140 and measure the temperature of the substrate WS. The temperature sensor 150 may measure the temperature of the substrate WS and the coating RE (see Figure 3 ) is transmitted to the control unit 140 in real time. The control unit 140 can adjust the output signal based on the temperature data received from the temperature sensor 150.

[0089] The temperature sensor 150 may include a first temperature sensor 151 and a second temperature sensor 152. The first temperature sensor 151 may be coupled to the top of the workbench ST and contact the substrate WS to measure the temperature of the substrate WS. The first temperature sensor 151 may be a contact temperature sensor. For example, the first temperature sensor 151 may be used as a thermocouple temperature sensor, a thermistor temperature sensor, a resistance temperature detector (RTD), etc. However, the type of the first temperature sensor 151 is not limited thereto and may be used as various types of contact temperature sensors.

[0090] The second temperature sensor 152 may be disposed apart from the worktable ST and measure the temperature of the substrate WS and the coating RE without contacting the substrate WS (see Figure 3). The second temperature sensor 152 may be a non-contact temperature sensor. For example, the second temperature sensor 152 may be an infrared temperature sensor. However, the type of the second temperature sensor 152 is not limited thereto and may be used as various types of non-contact temperature sensors. In this way, using the temperature sensor 150 as a contact temperature sensor and a non-contact temperature sensor may improve the accuracy of the temperature data measured in real time.

[0091] The printing head 200 may be disposed above the worktable ST and apply the coating liquid on the substrate WS to form a coating layer RE (see Figure 3 The print head 200 may be arranged behind the light irradiation module 100 based on the moving direction of the worktable ST, that is, the first direction DR1. When the worktable ST moves along the first direction DR1, the worktable ST or the substrate WS (see Figure 3 ) can overlap with the print head 200 and then overlap with the light irradiation module 100.

[0092] The print head 200 may be spaced apart from the light irradiation module 100 by a predetermined distance D1 along the first direction DR1. The distance D1 between the print head 200 and the light irradiation module 100 may be less than 200 mm. In the case where the distance D1 between the print head 200 and the light irradiation module 100 exceeds 200 mm, the time required from the coating process through the print head 200 to the start of the curing process through the light irradiation module 100 may increase. As a result, the process time required for the overall coating and curing process may be prolonged. In the case where the process time is prolonged, it may not be possible to have a coating RE (see Figure 3 ) desired shape or introduce foreign matter. For example, since it takes a long time to solidify the applied coating liquid, the coating liquid applied on the outside can move to the center by surface tension.

[0093] The printing head 200 may include a printing body 210 and a nozzle 220. The printing body 210 may be disposed above the workbench ST. The printing body 210 may include a coating on the substrate WS (see Figure 3 ) on the inner space of the coating liquid. The nozzle 220 may be exposed below the printing body 210. The nozzle 220 may spray the coating liquid inside the printing body 210 onto the substrate WS (refer to Figure 3 ) on. A plurality of nozzles 220 may be provided. The plurality of nozzles 220 may be arranged in at least one thermal form along an axis extending in the second direction DR2.

[0094] Figure 3 It is a side view of a light irradiation module 100 according to an embodiment of the present invention. Figure 3 is Figure 1A side view of the light irradiation module 100 as viewed in the B direction.

[0095] Reference Figure 3 The exhaust unit 130 may suck and remove the gas FU formed by the light L irradiated from the light irradiation module 100. Here, the coating RE may be formed by curing the coating liquid applied by the print head 200 through the light irradiation module 100. The gas FU may be formed by gasification of the coating liquid during the curing process of the coating RE.

[0096] The gas FU may be discharged from the nozzle 220 (refer to Figure 1 ) and contaminates the print head 200 (refer to Figure 1 ) of the nozzle 220 (refer to Figure 1 ). The gas FU may liquefy in the light emitting element 120 after the curing process to reduce the uniformity of the light L irradiated from the light emitting element 120. The gas FU may liquefy on the coating RE or the substrate WS after the curing process to reduce the quality of the product or cause poor reliability.

[0097] For example, in the case where the coating RE forms a hole CH for improving the transmittance of the sensor, the gas FU may liquefy inside the hole CH and become a foreign matter. In this case, the transmittance of the sensor may be reduced to reduce the quality of the product. Therefore, the gas FU can be removed by the exhaust unit 130 to solve the above problem.

[0098] The amount of gas FU generated may be proportional to the intensity of light L irradiated from the light emitting element 120. That is, if the intensity of light L irradiated from the light emitting element 120 increases, the amount of heat generated by the coating RE increases and the amount of gasified gas FU generated may increase. Therefore, the exhaust pressure of the exhaust unit 130 is increased in proportion to the intensity of light L irradiated from the light emitting element 120.

[0099] The suction pump 131 may be connected to the suction pipe 133 through the pipe 132 forming the inner space DI. The suction pipe 133 may suck the gas FU at a negative pressure provided from the suction pump 131. The gas FU sucked through the suction pipe 133 may move through the inner space DI of the pipe 132 and be exhausted to the outside.

[0100] The diameter of the suction pipe 133 may be smaller as it is farther from the pipe 132. The diameter DD1 of one end of the suction pipe 133 adjacent to the pipe 132 may be larger than the diameter DD2 of the other end of the suction pipe 133 away from the pipe 132. Thus, the path of the light L irradiated from the light emitting element 120 through the suction pipe 133 can be prevented from being obstructed.

[0101] The control unit 140 may receive the thickness TH of the coating RE as an initial input value. If the initial input value, i.e., the thickness TH of the coating RE, increases, the control unit 140 may change the output signal so that the absolute value of the negative pressure corresponding to the output signal becomes larger. That is, if the thickness TH of the coating RE increases, the magnitude of the negative pressure provided from the suction pump 131 to the suction pipe 133 may become larger. This is because when the thickness TH of the coating RE increases, the amount of the coating liquid vaporized for the same intensity of the light L increases, and the gas FU increases.

[0102] The control unit 140 can receive the volatility of the coating RE as an initial input value. Here, volatility can be proportional to the amount of gas that is vaporized at the same temperature. If the initial input value, i.e., volatility, increases, the control unit 140 can change the output signal so that the magnitude of the negative pressure corresponding to the output signal becomes larger. That is, when a material with high volatility, such as a monomer with a small molecular weight, is used as the coating RE, the magnitude of the negative pressure provided from the suction pump 131 to the suction pipe 133 can be increased. In this way, the absolute value of the negative pressure value of the suction pump 131 can be adjusted by changing the output signal according to the initial input value. Thus, the exhaust unit 130 can be actively controlled according to the amount of gas FU generated.

[0103] The control unit 140 may change the output signal based on the temperature data transmitted from the temperature sensor 150. The first temperature sensor 151 and the second temperature sensor 152 may measure the temperature of the substrate WS and the coating RE in real time. If the temperature of the coating RE increases, the amount of gas FU generated may increase. If the temperature of the substrate WS and the temperature of the coating RE measured in each of the first and second temperature sensors 151 and 152 increases, the output signal may be changed so that the absolute value of the negative pressure corresponding to the output signal becomes larger.

[0104] Figure 4a as well as Figure 4b is a photograph showing a coating RE and a hole CH according to an embodiment of the present invention. More specifically, Figure 4a is a photograph showing the plane of the coating RE and the hole CH without applying the exhaust unit 130, Figure 4b is a photograph showing the plane of the coating R and the hole CH in the case where the exhaust unit 130 is applied. Figure 4a as well as Figure 4b The intensity of the light L emitted by the light emitting element 120 is 1000 mW / cm 2 .

[0105] Reference Figure 4a , it can be confirmed that in the coating RE Figure 3The foreign matter AFU is formed by the liquefaction of the gas FU. Referring to the AA area inside the hole CH, it can be confirmed that there are multiple foreign matter AFU. However, referring to Figure 4b It can be confirmed that no foreign matter AFU is formed on the entire surface of the hole CH. It can be known that the exhaust unit 130 removes the gas FU before it is liquefied to prevent the formation of foreign matter AFU.

[0106] The following table 1 shows the Figures 1 to 4b 1 is a table showing the number of foreign matter AFU inside the hole CH used in the printing device 10. It is a table showing the number of foreign matter AFU inside the hole CH according to the intensity of the light L irradiated from the light emitting element 120 and the negative pressure value provided by the suction pump 131. Here, the number of foreign matter AFU is the number of foreign matter AFU identified inside the hole CH. The foreign matter AFU is identified using a microscope and is shown as a measured number only, regardless of the size of the foreign matter AFU.

[0107]

Table 1

[0108]

[0109]

[0110] Referring to Table 1, the intensity of light L is 150 mW / cm 2 In the case of , even if the negative pressure value of the suction pump 131 is 0 kPa, the foreign matter AFU in the hole CH is not identified. In Example 6, when the intensity of the light L is 300 mW / cm 2 When the negative pressure value of the suction pump 131 is -9 kPa, the foreign matter AFU inside the hole CH is not identified. In Example 5, when the intensity of the light L is 500 mW / cm 2 , when the negative pressure value of the suction pump 131 is -15 kPa, the foreign body AFU is not identified inside the hole CH. Referring to Example 4 and Example 5, the negative pressure value provided by the suction pump 131 is the same, which is -15 kPa, and only the intensity of the light L is different, which is 1000 mW / cm 2 , 500mW / cm 2 At this time, the intensity of light L is 500mW / cm 2 In Example 5, the number of foreign matter AFU is 0. On the contrary, when the intensity of light L is 1000mW / cm 2 In the large embodiment 4, the number of foreign matter AFUs is 9. When this is taken into consideration, it can be confirmed that the number of foreign matter AFUs increases when the intensity of the light L increases under the same conditions.

[0111] In addition, referring to Example 2 and Example 3, the negative pressure value provided by the suction pump 131 is the same, which is -30 kPa, and only the intensity of the light L is different, which is 2000 mW / cm2 , 1000mW / cm 2 At this time, the intensity of light L is 1000mW / cm 2 In Example 3, the number of foreign matter AFU is 0. On the contrary, when the intensity of light L is 2000mW / cm 2 In the large embodiment 2, the number of foreign matter AFUs is 21. When this is taken into consideration, it can be confirmed that the number of foreign matter AFUs increases when the intensity of the light L increases under the same conditions.

[0112] Referring to Example 4, when the intensity of light L is 1000 mW / cm 2 , when the negative pressure value is -15kPa, the number of foreign matter AFU is 9. Referring to Example 3, when the intensity of light L is the same, it is 1000mW / cm 2 When the negative pressure value is -30 kPa, the number of foreign matter AFU is 0. Referring to Example 3 and Example 4, it can be confirmed that the number of foreign matter AFU can be reduced when the negative pressure value is increased.

[0113] Referring to Example 2, when the intensity of light L is 2000 mW / cm 2 , when the negative pressure value is -30 kPa, the number of foreign matter AFU is 21. Referring to Example 1, when the intensity of light L is the same, it is 2000 mW / cm 2 When the negative pressure value is -60 kPa, the number of foreign matter AFU is 0. Referring to Example 1 and Example 2, it can be confirmed that the number of foreign matter AFU can be reduced when the negative pressure value is increased.

[0114] Referring to Example 2 and Example 3, it can be confirmed that the intensity of light L increases from 1000 mW / cm 2 (Example 3) Increased to 2000mW / cm 2 In the case of (Example 2), the number of foreign matter AFUs increased from 0 (Example 3) to 21 (Example 2). At this time, it can be confirmed that if the negative pressure value is increased to -60 kPa under the same conditions as in Example 1, the number of foreign matter AFUs is reduced to 0 again.

[0115] Referring to Example 4 and Example 5, it can be confirmed that the intensity of light L increases from 500 mW / cm 2 (Example 5) Increased to 1000 mW / cm 2In the case of (Example 4), the number of foreign matter AFUs increased from 0 (Example 5) to 9 (Example 4). At this time, it can be confirmed that if the negative pressure value is increased to -30 kPa under the same conditions as in Example 3, the number of foreign matter AFUs is reduced to 0 again.

[0116] When considering the results of Table 1 above, it can be confirmed that if the number of foreign matter AFU increases as the intensity of light L increases, the magnitude of the negative pressure value increases, and the number of foreign matter AFU decreases. Therefore, in order to effectively reduce the number of foreign matter AFU, it may be appropriate to adjust the absolute value of the negative pressure value to increase in proportion to the intensity of light L.

[0117] The following table 2 shows the Figures 1 to 4b Table 2 shows changes in the time required for the entire process according to the intensity of the light L emitted from the light emitting element 120.

[0118]

Table 2

[0119]

[0120] Referring to Table 2, it can be confirmed that the time required for the process changes according to the intensity of light L. Comparing Example 7 and Comparative Example 2, when the intensity of light L changes, the time required for the curing process changes. In both Example 7 and Comparative Example 2, the time required for the coating process is constant at 12 sec. Referring to Comparative Example 2, when the intensity of light L is 150 mW / cm 2 In the case of , the time required for the curing process is 30 sec. Referring to Example 7, when the intensity of light L is 1000 mW / cm 2 In the case of , the time required for the curing process is 4 seconds. Referring to Comparative Example 2 and Example 7, it can be confirmed that if the intensity of the light L increases, the time required for the curing process is greatly reduced.

[0121] It can also be confirmed that the time required for the entire process is 42 seconds in the case of Comparative Example 2, whereas it is reduced to 16 seconds in the case of Example 7. It can be confirmed that the time required for the entire process is different by 2.63 times. When considering the data in Table 2, it can be confirmed that increasing the intensity of light L is effective in reducing the time required for the entire process. As the intensity of light L is increased, the side effects of the foreign matter AFU can be solved by increasing the magnitude of the negative pressure value of the suction pump 131 as described in Table 1.

[0122] Figure 5 It is a side view of a light irradiation module 100 according to an embodiment of the present invention.

[0123] Reference Figure 5, the light irradiation module 100 may include a heater 160. Figures 1 to 3 The same structures as those described above are denoted by the same reference numerals and description thereof will be omitted.

[0124] The heater 160 may be coupled to at least one of the periphery of the pipe 132 and the periphery of the suction pipe 133. The heater 160 may provide heat to the pipe 132 and the suction pipe 133 to prevent the trapped gas FU from liquefying. The heater 160 may also be any structure that can provide heat to the pipe 132 and the suction pipe 133. For example, the heater 160 may be a heating wire surrounding the pipe 132 and the suction pipe 133.

[0125] The heater 160 may include a first heater 161 and a second heater 162. The first heater 161 may be coupled to an area of ​​the outer side surface of the pipe 132 to provide heat to the pipe 132. The first heater 161 may provide heat to the pipe 132 to prevent the gas FU moving through the internal space DI from being deprived of heat and reliquefying. The second heater 162 may surround the outer side surface of the suction pipe 133 and provide heat to the suction pipe 133. The second heater 162 may prevent the gas FU trapped in the suction pipe 133 from being deprived of heat and reliquefying. The second heater 162 may be a heating jacket surrounding the outer side surface of the suction pipe 133.

[0126] Figure 6 It is a three-dimensional diagram of a printing device 10 according to an embodiment of the present invention. Figure 7 It is a bottom view of a light irradiation module and a printing head according to an embodiment of the present invention. Figure 7 is Figure 6 The following is a bottom view of the reference Figures 1 to 3 The same structures described above are denoted by the same reference numerals, and description thereof will be omitted.

[0127] Reference Figure 6 as well as Figure 7 The suction pipe 133 may include first suction pipes 133a and 133b and second suction pipes 133c and 133d. The first suction pipes 133a and 133b may be disposed adjacent to both sides of the light emitting element 120 in the second direction DR2. The second suction pipes 133c and 133d may be disposed adjacent to both sides of the light emitting element 120 in the first direction DR1. The first suction pipes 133a and 133b may include a 1-1 suction pipe 133a disposed adjacent to one side of the light emitting element 120 in the second direction DR2 and a 1-2 suction pipe 133b disposed adjacent to the other side of the light emitting element 120 in the second direction DR2.

[0128] The second suction pipes 133c and 133d may include a 2-1 suction pipe 133c disposed adjacent to one side of the light emitting element 120 in the first direction DR1 and a 2-2 suction pipe 133d disposed adjacent to the other side of the light emitting element 120 in the first direction DR1. The 2-1 suction pipe 133c and the 2-2 suction pipe 133d may be disposed opposite to each other along the first direction DR1 with the light emitting element 120 interposed therebetween. Each of the 2-1 suction pipe 133c and the 2-2 suction pipe 133d may be connected to each of the ends of the suction duct 132a.

[0129] The suction duct 132a may be directly connected to the suction duct 133. The suction duct 132a may have a plurality of branched ends so as to be connected to each of the plurality of suction ducts 133a, 133b, 133c, 133d. The suction duct 132a may be branched into four paths and each of the ends of the branched suction ducts 132a may be connected to each of the 1-1 to 2-2 suction ducts 133a, 133b, 133c, 133d.

[0130] A width TH1 of each of the 1-1st and 1-2nd suction ducts 133a and 133b along the second direction DR2 may be greater than a width TH2 of each of the 2-1st and 2-2nd suction ducts 133c and 133d along the first direction DR1.

[0131] When the width TH2 of each of the 2-1st suction pipe 133c and the 2-2nd suction pipe 133d along the first direction DR1 increases, the interval D1 between the light irradiation module 100 and the print head 200 may increase. If the interval D1 between the light irradiation module 100 and the print head 200 increases, the time required after the coating process by the print head 200 until the curing process by the light irradiation module 100 starts may increase.

[0132] On the contrary, even if the width TH1 of each of the 1-1 suction pipe 133a and the 1-2 suction pipe 133b along the second direction DR2 becomes larger, the time required until the curing process by the light irradiation module 100 starts after the coating process by the print head 200 is not affected. Therefore, it is advantageous to make the width TH1 of the 1-1 and 1-2 suction pipes 133a, 133b along the second direction DR2 larger than the width TH2 of the 2-1 and 2-2 suction pipes 133c, 133d along the first direction DR1. According to this, the increase in the time required for the overall process can be minimized and the area on the plane occupied by the suction pipe 133 can be maximized.

[0133] Figure 8 It is a three-dimensional diagram of a printing device 10 according to an embodiment of the present invention. Fig. 9It is a side view of a light irradiation module 100 according to an embodiment of the present invention. Fig. 9 is Figure 8 Side view viewed from direction B.

[0134] Reference Figure 8 as well as Fig. 9 The printing device 10 may further include a moving unit 170 coupled between the duct 132 and the suction pipe 133. The moving unit 170 may move each of the 1-1 suction pipe 133a and the 1-2 suction pipe 133b. The moving unit 170 may also be any structure capable of moving the position of the suction pipe 133 according to the shape of the coating RE.

[0135] The moving unit 170 can move the position of the suction pipe 133 according to the shape of the coating RE. For example, when the width of the coating RE in the second direction DR2 is small, the moving unit 170 can move the 1-1 suction pipe 133a to the right and the 1-2 suction pipe 133b to the left. At this time, the 1-1 suction pipe 133a and the 1-2 suction pipe 133b can be closer to the coating RE where the gas FU is generated. The 1-1 suction pipe 133a and the 1-2 suction pipe 133b are arranged adjacent to the gas FU, so the gas FU can be sucked more effectively.

[0136] For example, when the thickness TH of the coating RE is small, the moving unit 170 may move the 1-1 suction pipe 133a and the 1-2 suction pipe 133b in the opposite direction of the third direction DR3, i.e., downward. At this time, the 1-1 suction pipe 133a and the 1-2 suction pipe 133b may be closer to the coating RE generated by the gas FU. The 1-1 suction pipe 133a and the 1-2 suction pipe 133b are disposed adjacent to the gas FU, and thus, the gas FU may be more effectively sucked.

[0137] Figures 10a to 10c 1 is a front view showing the operation of the printing device 10 according to one embodiment of the present invention.

[0138] Reference Fig.10a , the print head 200 may apply a coating liquid AR on the substrate WS (coating process). The applied coating liquid AR may form a preliminary coating layer PRE. At this time, the coating liquid AR may be an optical clear resin, an optical clear adhesive, or a light-shielding substance. The coating liquid AR may be an acrylic resin. However, the type of the coating liquid AR is not limited thereto and may be any type of substance that can form a coating layer RE generated through a coating and curing process.

[0139] The viscosity of the coating liquid AR may be 8 cP or more and 20 cP or less. If the viscosity of the coating liquid AR is less than 8 cP, it may be difficult to control the coating liquid AR in terms of process. If the viscosity of the coating liquid AR exceeds 20 cP, problems may occur when the coating liquid AR protrudes through the nozzle 220 of the print head 200.

[0140] Reference Fig.10a as well as Fig.10b , the workbench ST on which the substrate WS and the preliminary coating PRE are placed can be moved in the first direction DR1. The workbench ST on which the substrate WS and the preliminary coating PRE are placed can overlap with the light irradiation module 100. The light irradiation module 100 can irradiate light L onto the preliminary coating PRE on the substrate WS. The preliminary coating PRE can be cured by the light L irradiated from the light irradiation module 100 to form a coating RE (curing process). The greater the intensity of the light L irradiated from the light irradiation module 100, the shorter the time required in the curing process. However, the greater the intensity of the light L irradiated from the light irradiation module 100, the greater the gas FU (refer to Fig.10c ) can be more.

[0141] Reference Fig.10b as well as Fig.10c , gas FU may be generated by the light L irradiated from the light irradiation module 100. The gas FU may be sucked and exhausted by the exhaust unit 130 (exhaust process). The negative pressure provided from the suction pump 131 may be transferred to the suction pipe 133 through the pipe 132. The gas FU may be captured by the negative pressure transferred to the suction pipe 133. Fig.10b The curing process and Fig.10c The exhaust processes can be performed simultaneously.

[0142] Fig.11 It is an exploded perspective view schematically showing the display device DD.

[0143] Reference Fig.11 The display device DD may be an organic light emitting display device as a device for displaying an image, but is not limited thereto. For example, the display device may be a liquid crystal display device.

[0144] The display device DD may include a display panel DP, an optical unit PL, an adhesive layer ADS, a light shielding layer BL, and a window WP. However, the structure of the display device DD is not limited thereto and may further include other constituent elements.

[0145] The display panel DP may have a display area DA and a non-display area NDA surrounding the display area DA. The display panel DP may display an image through the display area DA. The display panel DP may include a light-emitting layer DP-EL and an encapsulation layer TFE. The light-emitting layer DP-EL may include a substrate (not shown) and a pixel layer (not shown) disposed on the substrate and including a plurality of pixels. The pixel layer may include a plurality of pixels, each of the plurality of pixels including an anode, a cathode, and an organic light-emitting element disposed between the anode and the cathode.

[0146] The encapsulation layer TFE may be disposed on the light emitting layer DP-EL. The encapsulation layer TFE may seal the pixel layer and protect the pixel layer from external moisture and foreign matter. The encapsulation layer TFE may have a structure in which organic layers and inorganic layers are alternately and repeatedly stacked. The display panel DP may have the above-mentioned structure, but is not limited to the above-mentioned structure of the display panel DP.

[0147] The optical unit PL may polarize or block light emitted from the display panel DP. The optical unit PL may be attached to the encapsulation layer TFE. The optical unit PL may be an anti-reflection layer that blocks light incident from the outside of the display panel DP.

[0148] The window WP may cover the display panel DP and protect the display panel DP from external impact. The window WP may be a glass substrate or a plastic substrate having light permeability.

[0149] The light shielding layer BL may be disposed on the back side of the window WP and overlap the non-display area NDA. The light shielding layer BL may include a substance that absorbs light like carbon black. The light shielding layer BL may be disposed not only on the back side of the window WP but also on the side surface.

[0150] An adhesive layer ADS may be interposed between the display panel DP and the window WP to attach the window WP to the display panel DP. Fig.11 The adhesive layer ADS is shown as a single layer in the figure, but a plurality of adhesive layers ADS may be provided as needed. For example, the adhesive layer ADS may be disposed between the display panel DP and the optical unit PL so that the optical unit PL is bonded to the display panel DP. The adhesive layer ADS may be formed by applying a liquid adhesive and then curing it.

[0151] The printing device 10 of the present invention can be used (see Figure 1 ) to form the adhesive layer ADS and the light shielding layer BL of the display device DD. That is, the printing device 10 (see Figure 1 ) A liquid adhesive or a light-shielding material is applied and cured to form an adhesive layer ADS or a light-shielding layer BL.

[0152] However, the printing device 10 (see Figure 1 ) formed by the adhesive layer ADS and the light shielding layer BL are not limited thereto. For example, the display device DD may further include a protective layer disposed on the window WP. The printing device 10 of the present invention (see Figure 1 ) A liquid coating material having excellent impact resistance can be applied and cured to form a protective layer.

[0153] The above description is made with reference to the preferred embodiments of the utility model, but it is understood by those skilled in the art or those with general knowledge in the technical field that various modifications and changes can be made to the utility model without exceeding the concept of the utility model and the scope of the technical field recorded in the attached claims. Therefore, the technical scope of the utility model is not limited to the contents recorded in the detailed description of the specification, but should be determined by the claims.

Claims

1. A light irradiation module, characterized in that: include: A workbench, on which a substrate and a coating disposed on the substrate are placed, and moves in a first direction; A main body, arranged above the workbench; a light emitting element, arranged in the center of the main body and irradiating light toward the workbench; a first suction pipe disposed adjacent to the light emitting element in a second direction transverse to the first direction; a pipeline connected to the first suction pipe; as well as A suction pump is connected to the pipeline and provides a negative pressure having an absolute value proportional to the intensity of the light to the first suction pipe.

2. The light irradiation module according to claim 1, characterized in that: The first suction pipe is provided in plurality. The first suction pipe comprises: a 1-1 suction pipe arranged adjacent to one side of the light emitting element in the second direction; and The first-second suction pipe is arranged adjacent to the other side of the light emitting element in the second direction, The 1-1 suction tube and the 1-2 suction tube are arranged to face each other with the light emitting element interposed therebetween.

3. The light irradiation module according to claim 2, characterized in that: The light irradiation module also includes: a second suction pipe, arranged adjacent to the light emitting element in the first direction; The second suction pipe is provided in plurality. The second suction pipe comprises: A 2-1 suction pipe and a 2-2 suction pipe are arranged to face each other along the first direction with the light emitting element interposed therebetween.

4. The light irradiation module according to claim 3, characterized in that: A width of the 1-1 suction duct along the second direction is greater than a width of the 2-1 suction duct along the first direction.

5. The light irradiation module according to claim 1, characterized in that: The light irradiation module also includes: A control unit is connected to the light emitting element and the suction pump, and transmits an output signal for the negative pressure proportional to the input signal to the suction pump based on an input signal received from the light emitting element.

6. The light irradiation module according to claim 5, characterized in that: The light irradiation module also includes: a temperature sensor connected to the control unit and measuring the temperature of the substrate, The temperature sensor comprises: a first temperature sensor, coupled to the upper surface of the workbench and in contact with the substrate to measure the temperature of the substrate; and The second temperature sensor is disposed apart from the worktable and measures the temperature of the substrate and the coating layer without contacting the substrate.

7. The light irradiation module according to claim 1, characterized in that: The light irradiation module also includes: A heater is coupled to at least one of the periphery of the pipeline and the periphery of the first suction pipe.

8. The light irradiation module according to claim 7, characterized in that: The heater is provided in plurality. The heater comprises: a first heater coupled to an area of ​​an outer side surface of the pipe and providing heat to the pipe; and The second heater surrounds the outer side of the first suction pipe and provides heat to the first suction pipe.

9. A printing device, characterized in that: include: A workbench, on which the substrate is placed and moves in a first direction; A light irradiation module is arranged above the workbench and irradiates light toward the workbench; as well as A printing head is arranged above the workbench and behind the light irradiation module based on the first direction, and applies a coating liquid on the substrate to form a coating layer. The light irradiation module comprises: A main body, arranged above the workbench; a light emitting element, arranged in the center of the main body and irradiating light toward the workbench; a suction tube disposed adjacent to the light emitting element in a second direction transverse to the first direction; a pipe connected to the suction pipe; and A suction pump is connected to the pipeline and provides a negative pressure having an absolute value proportional to the intensity of the light to the suction pipe.

10. The printing device according to claim 9, characterized in that The suction pipe is provided in plurality. The suction tube comprises: a first suction pipe disposed adjacent to one side of the light emitting element in the second direction; and The second suction pipe is arranged adjacent to the other side of the light emitting element in the second direction.

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