KR102250076B1 - Laminating system - Google Patents

Abstract

An embodiment of the present invention provides a lamination system, which includes: an application device configured to form an adhesive layer on a first target; a supply device configured to provide a second target; and a bonding device configured to bond the first target to the second target, in which the application device includes: an injection unit including a plurality of inkjet heads configured to inject adhesive droplets on the first target to form an adhesive layer; a curing unit configured to perform a first temporary curing on the adhesive layer; and a first controller configured to control the injection unit and the curing unit. According to the present invention, since a transparent optical resin is applied to a panel by an inkjet method, a shape of the adhesive layer can be freely formed.

Description

Laminating system {LAMINATING SYSTEM}

The embodiment relates to a lining system.

A display field for processing and displaying a large amount of information has rapidly developed, and in response to this, various display devices have been developed. Such a display may be bonded (laminated) to a panel and a window using an adhesive.

Such a bonding process can influence the competitiveness of touch screen makers because it is difficult to secure a high yield.

The bonding process is classified into an air gap bonding method and a direct bonding method. The air gap bonding method is a method in which an adhesive is applied and attached only to the bezel (border), and the direct bonding method is a method in which an optically clear adhesive film (OCA) is attached to the entire surface to be bonded.

Compared to the air gap bonding method, the direct bonding method can reduce the light reflectance from 15% to 5% and the light source loss from 12% to 4%. Therefore, there is an effect of improving visibility. Therefore, most of the portable terminals that are recently manufactured are manufactured using a direct bonding method.

Since the conventional direct bonding method uses an optically clear adhesive film, a process of removing a protective film, etc. attached to the film and a cleaning process are essential, and thus there is a problem of increasing the process time.

In addition, since all of the adhesive films are manufactured and supplied with a constant thickness, there is a problem that the adhesive cannot be adjusted to various shapes and thicknesses.

The embodiment provides a laminating system in which a transparent optical resin is applied to a panel by an inkjet method, and a panel and a window are bonded together.

The problems to be solved in the embodiments are not limited thereto, and the objectives and effects that can be grasped from the solutions or embodiments of the problems described below are also included.

A laminating system according to an aspect of the present invention includes an application device for forming an adhesive layer on a first object; A supply device for providing a second object; And a bonding device for bonding the first object and the second object, wherein the application device comprises: a spray unit including a plurality of inkjet heads configured to form the adhesive layer by spraying an adhesive droplet on the first object; A curing unit for primary temporary curing of the adhesive layer; And a first control unit controlling the injection unit and the curing unit.

The first control unit may control to form a first adhesive layer by spraying adhesive droplets from the plurality of inkjet heads, and control the curing unit to first temporarily cure the first adhesive layer as a whole.

The first control unit may control the plurality of inkjet heads to form a second adhesive layer on the first temporary cured first adhesive layer.

The first control unit may selectively drive the plurality of inkjet heads so that the second adhesive layer has a predetermined shape.

The first control unit may control the curing unit to first temporarily cure the second adhesive layer.

The curing unit may include a plurality of ultraviolet light emitting devices arranged in a matrix form, and the first control unit may selectively drive only ultraviolet light emitting devices overlapping the second adhesive layer in a vertical direction.

The curing unit includes a first ultraviolet light source having a predetermined irradiation angle and a second ultraviolet light source having an irradiation angle smaller than that of the first ultraviolet light source, and a first adhesive layer is formed on the first object by the plurality of inkjet heads. When applied, the first ultraviolet light source first temporarily cures the first adhesive layer as a whole, and when a second adhesive layer is selectively applied to a partial region of the first adhesive layer, the second ultraviolet light source selectively selects the second adhesive layer 1 Tea can be temporarily hardened.

The bonding device may include a fixing module for fixing the second object; And a pressure pad disposed to face the fixing module, and the fixing module may include a suction channel fixing the second object and a plurality of light sources irradiating ultraviolet light to the second object.

And a clamp for fixing a first object to which the adhesive layer is applied, and the first object may be disposed between the fixing module and the pressing pad.

The bonding device may secondary temporary cure the adhesive layer after the first and second objects are bonded, and the secondary temporary curing may be 101% to 158% of the first temporary curing.

According to the embodiment, since the transparent optical resin (Optically Clear Resin) is applied to the panel in an inkjet method, the shape of the adhesive layer can be freely formed.

In addition, since the process of removing the protective film and the cleaning process can be omitted, the manufacturing process can be simplified.

Various and beneficial advantages and effects of the present invention are not limited to the above description, and will be more easily understood in the course of describing specific embodiments of the present invention.

1 is a conceptual diagram of a laminating system according to an embodiment of the present invention,
2A is a conceptual diagram of an adhesive application device,
2B is a block diagram of an adhesive application device,
3 is a diagram showing a process of forming an adhesive layer on a panel by applying an adhesive,
4 is a view showing a process of first pre-curing the applied adhesive layer,
5 is a view showing a process of forming an adhesive layer again on the applied adhesive layer,
6 is a view showing an adhesive layer of various shapes,
7 is a diagram showing various arrangements of an inkjet head and a curing unit,
8A to 8E are views showing a method of forming an adhesive layer according to another embodiment,
9 is a view showing a curing method according to another embodiment,
10 is a conceptual diagram of a bonding device,
11 is a diagram showing a process of bending the panel,
12 is a diagram showing a process of bringing a part of a panel into contact with a window,
13 is a diagram showing a process of attaching a panel to a window as a whole,
14 is a diagram showing a state in which a window and a panel are bonded together.

The present invention is intended to illustrate and describe specific embodiments in the drawings, as various changes may be made and various embodiments may be provided. However, this is not intended to limit the present invention to a specific embodiment, it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms including ordinal numbers such as second and first may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, the second element may be referred to as the first element, and similarly, the first element may be referred to as the second element. The term and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being "connected" or "connected" to another component, it is understood that it may be directly connected or connected to the other component, but other components may exist in the middle. It should be. On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there is no other component in the middle.

The terms used in the present invention are used only to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present invention, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof does not preclude in advance.

Unless otherwise defined, all terms used herein including technical or scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in the present invention. Does not.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings, but identical or corresponding components are denoted by the same reference numerals regardless of reference numerals, and redundant descriptions thereof will be omitted.

1 is a conceptual diagram of a laminating system according to an embodiment of the present invention.

1, the laminating system according to the embodiment includes an adhesive application device 200 for applying an adhesive to a panel, a window supply device 300 for providing a window, and a bonding device 100 for bonding the window and the panel. Can include.

The adhesive applying apparatus 200 may include a first loading region 200A, a first plasma treatment region 200B, and an adhesive application region 200C in which the panel is disposed on the tray T.

A plurality of trays T may be loaded in the first loading area 200A. Panels may be disposed on each of the plurality of trays T to be transported.

The panel may be a display panel on which an image is output, a touch panel for recognizing a user's touch input, or a panel in which a display function and a touch function are integrated. In addition, various electronic devices may be used in addition to the panel 13. That is, various electronic components can be applied in addition to the panel. Hereinafter, it will be described as a panel for convenience of description.

The first loading region 200A may be connected to the first plasma treatment region 200B and the adhesive application region 200C. The transfer device (not shown) may be disposed in the first loading region 200A, the second plasma treatment region 200B, and the adhesive application region 200C. Accordingly, the panel 13 disposed on the tray T is transferred to the plasma treatment region 200B and the adhesive application region 200C so that the adhesive may be applied and cured.

The conveying device may be a conveyor belt. However, the present invention is not limited thereto, and the robot arm may transfer the tray T from the first loading area 200A to the first plasma treatment area 200B and the adhesive application area 200C instead of the transfer device.

A cleaning area (not shown) may be disposed between the loading area 200A and the plasma processing area 200B. Since the panel is provided with the protective film attached to the upper and lower portions, foreign matter attached to the upper or lower surface of the protective film can be removed to prevent defects occurring after bonding.

The method of removing foreign matter is not particularly limited. Exemplarily, the method for removing foreign substances may be either a dry method or a wet method. As a dry cleaning method, a cleaning method through physical force and exhaust such as USC (Ultra Sonic Cleaning) and Hyper Clean may be applied, but is not limited thereto.

In the process of peeling the protective film before bonding, cleaning can be performed before peeling the protective film to prevent foreign matters attached to the surface of the protective film from adhering to the product. However, it is not necessarily limited to this, and may be washed after peeling the protective film.

At this time, in order to improve cleaning efficiency, a static electricity removal device (ionizer) capable of minimizing static electricity and reattachment may be installed locally or on the front side and used.

After cleaning is completed, the protective film peeling unit may remove the protective film. Detape method, adsorption pad method, and gripper method are available for peeling the protective film, and film peeling can be realized by designing according to the shape and process conditions of the product. In an exemplary embodiment, the protective film may be peeled off using a multi-axis or single-axis robot system to which a gripper is applied.

The first plasma treatment region 200B may be surface-treated in a dry manner so that the adhesive is well adhered to the front surface of the panel. Surface treatment can increase the adhesive strength of the adhesive by minimizing the contact angle (10 to 30 degrees or less) by using atmospheric pressure plasma. However, the present invention is not limited thereto, and a hydrophilic surface treatment method capable of reducing a contact angle in addition to plasma or UV may be applied. Since the contact angle is minimized by the hydrophilic treatment, uniformity of application may be improved.

In the adhesive application area 200C, the adhesive may be applied using an inkjet method instead of a conventional slit nozzle or micro dispenser method. If the adhesive is applied by the inkjet method, it is possible to freely adjust the thickness, which was not realized in the conventional slit nozzle or dispenser, and if necessary, the temporary curing operation can be performed simultaneously according to the characteristics of the adhesive material. A detailed configuration for applying the adhesive will be described later.

The window supply apparatus 300 may include a second loading area 300A, a second cleaning area 300B, and a second plasma processing area 300C. The window may be a cover glass that is bonded to the panel to protect the panel. However, the present invention is not limited thereto, and various devices requiring bonding may be applied without limitation.

A plurality of trays T may be loaded in the second loading area 300A. A window may be disposed on each of the plurality of trays T to be transported. The second loading area 300A may be connected to the cleaning area 300B and the second plasma processing area 300C.

The transfer device may be disposed in the second loading area 300A, the second cleaning area 300B, and the second plasma processing area 300C. Accordingly, the window disposed on the tray T may be transferred to the second cleaning area 300B and the second plasma processing area 300C.

The second cleaning area 300B may prevent defects occurring after bonding by removing foreign substances attached to the protective film of the window.

In the process of peeling the protective film before bonding, cleaning can be performed before peeling the protective film to prevent foreign matters attached to the surface of the protective film from adhering to the product. However, it is not necessarily limited to this, and may be washed after peeling the protective film. The protective film can be peeled off using a gripper.

The bonding device 100 may bond the supplied window and the panel. As described above, since the adhesive is applied on the panel, it may be bonded by the adhesive when the panel is pressed against the window.

2A is a conceptual diagram of an adhesive application device, and FIG. 2B is a conceptual diagram of an adhesive application device.

2A and 2B, the adhesive application device 200 according to the embodiment includes a stage 230 on which the panel 13 is disposed, and an inkjet head 210 for applying an adhesive to the panel 13 It may include a unit 210A, a curing unit 220A including an ultraviolet light source 220 for temporarily curing the adhesive, and a first control unit 270.

The stage 230 may move or rotate the tray T in the X, Y, and Z axes. The robot arm may load and unload the tray T on the stage 230. However, the present invention is not limited thereto, and the stage 230 may be a transfer unit that transfers the panel 13. Exemplarily, the stage may be configured as a conveyor belt to transport the tray T.

According to an embodiment, the adhesive application may be performed using an inkjet method instead of a conventional slit nozzle or micro dispenser. If the inkjet method is used, it is possible to adjust the thickness of the adhesive, which was not realized in the existing slit nozzle or dispenser, and if necessary, the temporary curing operation can be performed simultaneously according to the characteristics of the adhesive material.

As the adhesive, various resins that can be cured by UV light may be applied. For example, the adhesive may be a resin such as acrylic, but is not limited thereto, and various resins that can be cured by ultraviolet rays may be applied. For example, a silicone-based or urethane-based resin may be selected.

The image measuring device 261 may acquire an image of the panel 13. The first control unit 270 may align the inkjet head 210 to an accurate position using image information of the panel 13. For example, the first control unit 270 may move and rotate the inkjet head 210 to match the panel 13. Alternatively, the stage 230 may be moved or rotated to match the inkjet head 210 and the panel 13. That is, the inkjet head 210 or the stage 230 may be relatively rotated so that the inkjet head 210 is disposed at an accurate position on the panel 13.

The height sensor 262 may measure the thickness of the adhesive applied on the panel. For example, the height sensor may be a laser sensor, but is not limited thereto.

According to an embodiment, an adhesive may be simultaneously applied from a plurality of inkjet heads 210. For example, the plurality of inkjet heads 210 may be arranged in a matrix form, but the present invention is not limited thereto. According to this configuration, since the adhesive is simultaneously applied from the plurality of inkjet heads 210, it is possible to uniformly apply the adhesive. If an adhesive is applied to the panel 13 while one inkjet head 210 is moving, it may be difficult to apply a uniform adhesive due to a movement tolerance, and a process time may increase.

The plurality of inkjet heads 210 may spray an adhesive on the panel 13 according to a predetermined injection amount. In this case, the injection amount of each inkjet head 210 may be different. Exemplarily, in order to make the center of the panel 13 relatively thin and the edge of the panel 13 to be relatively thick, the injection amount of the inkjet head 210 disposed at the edge of the panel 13 is placed in the center. It may be greater than the injection amount of the inkjet head 210.

The adhesive supply unit 281 may be composed of a main tank and a sub tank so that no external contaminants are introduced and the adhesive is always supplied. The supply from the main tank to the sub tank uses a quantitative pump or N ₂ pressurized supply, and the sub tank can be supplied in a designed amount by installing a weight or level sensor by an electronic scale. The level sensor may be applied to a laser method, an optical method, or a capacitance method, but is not limited thereto.

The head cleaning unit 282 may remove clogged nozzles of the head 210, defects of the head 210 and replacement according to process changes, ink changes according to processes, and air bubbles in the pipes generated thereby. The head cleaning unit may be configured to maintain the performance of the head 210 by performing a purge or cleaning operation.

The head cleaning unit 282 is made in the form of a chamber, and wet cleaning, head purge, and dry cleaning are performed simultaneously or sequentially. Equipment contamination can be minimized when moving to a process location by removing existing contaminants.

In the chamber of the head cleaning unit, an exhaust port capable of inhaling and removing floating mist, harmful substances and fumes caused by purge or wet cleaning can prevent scattering and contamination to the outside of the chamber as much as possible. If there is no cleaning process, the upper cover is installed. It can be installed and operated automatically or manually.

The plurality of ultraviolet light sources 220 may be disposed between the plurality of inkjet heads 210. For example, the ultraviolet light source 220 may use an ultraviolet lamp or an ultraviolet light emitting diode.

The ultraviolet light source 220 may use various types of wavelength bands according to the characteristics of the adhesive. When using an ultraviolet light emitting diode, a first ultraviolet light emitting diode having a main peak at 310 nm, a second ultraviolet light emitting diode having a main peak at 364 nm, and a third ultraviolet light emitting diode having a main peak at 410 nm may be included.

In addition, a multi-wavelength metal UV lamp may be designed as a single or a combination, and one or more UV lamps required for supply of curing energy may be installed to supply energy required for curing.

The ultraviolet light source 220 may improve adhesion by temporarily curing the applied adhesive layer 12. However, when the adhesive layer 12 is completely cured, the adhesive strength is lost, so it is important to irradiate only energy enough to be temporarily cured. For example, the ultraviolet light source 220 may be in a state in which the first temporary curing is cured to 60% to 80% based on 100% completely cured.

3 is a diagram showing a process of forming an adhesive layer on a panel by applying an adhesive, FIG. 4 is a diagram showing a process of first precuring the applied adhesive layer, and FIG. 5 is a diagram showing a process of forming an adhesive layer on the applied adhesive layer again. FIG. 6 is a view showing a process, FIG. 6 is a view showing various shapes of adhesive layers, and FIG. 7 is a view showing various arrangements of an inkjet head and an ultraviolet light source.

Referring to FIG. 3, an adhesive layer may be formed by spraying droplets from a plurality of inkjet heads 210. As described above, according to the embodiment, since the adhesive is simultaneously sprayed from the plurality of inkjet heads 210 on the panel 13, a uniform adhesive layer can be formed. When printing by dividing a large area, an interface is formed on the interface according to various conditions, so that the same adhesive performance may not be obtained, and defects such as MURA or stains may occur.

The first adhesive layer 12a sprayed on the panel 13 for the first time may be a base layer. Accordingly, the first control unit 270 may drive the inkjet head 210 so that the first adhesive layer 12a is formed on the entire surface of the panel 13.

Referring to FIG. 4, a plurality of ultraviolet light sources 220 may first temporarily cure the adhesive layer 12 by irradiating ultraviolet rays. In order to manufacture the adhesive layer 12 in a predetermined shape, a process of temporarily curing the first adhesive layer 12a after forming the first adhesive layer 12a may be required. Since the first adhesive layer 12a, which is not first precured, has low viscosity, it may be difficult to control the adhesive layer to a desired shape if droplets are sprayed directly thereon.

Referring to FIG. 5, a second adhesive layer 12b may be formed by spraying droplets on the first pre-cured first adhesive layer 12a. At this time, the adhesive may be sprayed only on a necessary portion so as to have a predetermined shape. After that, the second adhesive layer 12b may be first pre-cured by irradiating ultraviolet rays again.

For example, the second adhesive layer 12b may be formed on the edge EA of the panel 13. When the window to be bonded to the panel 13 is curved, the adhesive layer on the curved portion may be thinned as the panel 13 is bent. Therefore, in order to compensate for this, it may be advantageous to form a thick adhesive layer on the edge of the panel.

The first control unit 270 may control the panel 13 to be unloaded by the adhesive applying device 200 when the thickness of the adhesive layer 12 reaches a predetermined thickness using a height sensor. However, when the thickness of the adhesive layer does not reach a predetermined thickness, the adhesive layer application operation may be repeated again.

Referring to FIG. 6, the shape of the adhesive may be variously modified according to bonding conditions. As shown in (a) of FIG. 6, the adhesive layer may be formed so that the edge portion protrudes, and as shown in (b) of FIG. 6, the hemispherical protrusion may be formed on the edge portion of the adhesive layer, and (c) and ( As shown in d), the adhesive layer may be formed so that the central portion of the adhesive layer protrudes, the upper surface of the adhesive layer may be formed to have a convex lens shape, as shown in (e) of FIG. It may be formed as, and the edge portion of the adhesive layer may protrude sharply as shown in (g) of FIG. 6. In addition, it may be formed in various shapes as shown in (h) to (n) of FIG. 6.

The arrangement of the inkjet head 210 and the ultraviolet light source 220 may be variously modified as shown in FIG. 7 so that various adhesive shapes can be controlled. Illustratively, the inkjet head 210 and the ultraviolet light source 220 may be alternately disposed as shown in FIGS. 7A and 7B, and the inkjet head 210 may be alternately disposed as shown in FIGS. 7C and 7D. ) May be arranged in a zigzag direction. In addition, a plurality of ultraviolet light sources 220 may be disposed between a pair of inkjet heads 210 as shown in FIG. 7E.

8A to 8E are views showing a method of forming an adhesive layer according to another embodiment, and FIG. 9 is a view showing a method of curing an adhesive layer according to another embodiment,

Referring to FIG. 8A, when the panel 13 is disposed on the conveyor belt 250, droplets may be sprayed from the inkjet head 210 to form the first adhesive layer 12a. A plurality of inkjet heads 210 may be disposed to apply an adhesive to the panel 13 as a whole.

Referring to FIG. 8B, the panel 13 may move forward and be disposed under the ultraviolet light source 220. Accordingly, the ultraviolet light source 220 may first cure the first adhesive layer 12a by irradiating ultraviolet rays. The ultraviolet light source 220 may include a first ultraviolet light source 220 that irradiates ultraviolet rays in a wide range and a second ultraviolet light source 220 that irradiates ultraviolet rays in a narrow range. The first ultraviolet light source 220 may first temporarily cure the first adhesive layer 12a by irradiating ultraviolet rays entirely on the first adhesive layer 12a.

Referring to FIG. 8C, the panel 13 may be moved to the rear and disposed under the inkjet head 210. In the inkjet head 210, the second adhesive layer 12b may be formed by spraying droplets on required portions.

Referring to FIG. 8D, the panel 13 may move forward again and be disposed under the ultraviolet light source 220. The second ultraviolet light source 220 may selectively irradiate ultraviolet rays only on the second adhesive layer 12b. Therefore, since ultraviolet rays are not irradiated to the area where the adhesive has not been applied again, curing may no longer proceed. Accordingly, the adhesive layer 12 may be first pre-cured as a whole. According to this configuration, it is possible to prevent further curing of a portion that has already undergone preliminary curing even if repeated curing operations are performed.

Referring to FIG. 9, the ultraviolet light source 220 may include a plurality of ultraviolet light sources 220. Therefore, when ultraviolet light is required to be irradiated as a whole, ultraviolet light is irradiated from all ultraviolet light sources 220, whereas when ultraviolet light is irradiated only in some areas, ultraviolet light may be irradiated only from the ultraviolet light source 220 corresponding to the corresponding region. have. Since ultraviolet rays are not irradiated to the area where the adhesive has not been applied again, curing may not proceed any further.

10 is a conceptual diagram of a bonding device.

Referring to FIG. 10, the bonding device according to the embodiment includes a case 110, a lower chamber 112, an upper chamber 113, a fixing module 130 for fixing the window 11, and a pressure pad 120. Includes.

The lower chamber 112 may be combined with the upper chamber 113 to form a vacuum inside. The configuration of the chamber is not particularly limited as long as it is a structure capable of forming a vacuum, and all general chamber structures may be applied.

A sensor 112a for measuring whether the lower chamber 112 and the upper chamber 113 are fastened may be further disposed in the lower chamber 112. The sensor 112a may be disposed on a contact surface where the lower chamber 112 and the upper chamber 113 are fastened. The type of sensor 112a is not particularly limited. The sensor may be at least one of an optical sensor, a capacitive sensor, and a touch sensor.

A sealing member (not shown) that seals when combined may be disposed in the lower chamber 112 and the upper chamber 113. The sealing member may be made of a rubber material, but is not limited thereto, and silicon-based, Teflon-based, and metal-based may be applied. The sealing member may be implemented in an appropriate shape according to the design of the chamber.

The upper chamber 113 may be raised and lowered by the second driving unit 114. The upper chamber 113 may be lowered by the second driving unit 114 to be fastened to the lower chamber 112. At this time, the upper chamber 113 may be moved and rotated in 4 to 6 axes by the alignment unit 116.

However, the present invention is not limited thereto, and the lower chamber 112 may rise to form a vacuum. Alternatively, the upper chamber 113 may descend and the lower chamber 112 may rise to seal the working space.

After the upper chamber 113 and the lower chamber 112 are coupled, they may be fixed by a fixing clamp (not shown). The fixing clamp is not particularly limited as long as it is a configuration capable of fixing the upper chamber 113 and the lower chamber 112.

The fixing module 130 may be disposed inside the upper chamber 113. The fixing module 130 may serve to fix the window 11. The fixing module 130 may be provided with a fixing surface 130-1 so that the window 11 having a plane or curvature may be fixed.

The first driving unit 115 may raise and lower the pressure pad 120. At this time, the panel clamp 140 for fixing the panel 13 may also be raised and lowered. In addition, the first driving unit 115 may rotate the pressing pad 120 and the panel clamp 140.

The detection unit 161 is disposed between the fixing module 130 and the pressure pad 120 to measure whether the window 11 and the panel 13 are aligned. In addition, the detection unit 161 may measure whether the lower chamber 112 and the upper chamber 113 are aligned. According to the detection unit 161, since it is possible to check whether the window 11 and the panel 13 and the lower chamber 112 and the upper chamber 113 are correctly aligned, accurate lamination may be possible.

The window 11 may be a cover glass of a portable terminal such as a smartphone. The window 11 may have a curvature formed on its side. The area in which the curvature is formed may be used as an auxiliary display area. However, the present invention is not limited thereto, and the side surface of the window 11 may have a curvature for various reasons.

The adhesive layer 12 may be first temporarily cured while being applied to the panel 13 or the window 11. Temporary curing can be defined as a state in which the resin is not completely cured but only partially cured. For example, the first temporary curing may be in a cured state of 60% to 80% based on 100% completely cured.

FIG. 11 is a diagram showing a process of bending a panel, FIG. 12 is a view showing a process of bringing a part of the panel into contact with a window, FIG. 13 is a view showing a process of attaching the panel to a window as a whole, and FIG. 14 is a window It is a diagram showing a state in which the and panels are bonded together.

Referring to FIG. 11, the window 11 may be fixed to the fixing surface 130-1 of the fixing module 130. Since air is sucked into the suction device 181 through the plurality of suction channels 132 formed in the fixing block 131, the window 11 can be firmly fixed to the fixing surface 130-1 of the fixing block 131. . However, the fixing method is not necessarily limited thereto, and a mechanical fixing structure (eg, a fixing jig) may be provided in addition to the suction channel.

Further, in the fixed block 131 according to the embodiment, an ultraviolet irradiation channel 134 may be further disposed therein. An ultraviolet light emitting device 133 is disposed in the ultraviolet irradiation channel 134 to irradiate ultraviolet light to the window 11. The ultraviolet light emitting device 133 may be an ultraviolet light emitting diode or an ultraviolet lamp. In this case, a light-transmitting member (eg, quartz) capable of transmitting ultraviolet rays may be disposed on the fixing surface 130-1.

The plurality of ultraviolet light-emitting devices 133 include a plurality of first ultraviolet light-emitting devices 133 having a first emission wavelength, a plurality of second ultraviolet light-emitting devices 133 having a second emission wavelength, and a plurality of third emission wavelengths. Three third ultraviolet light emitting devices 133 may be included.

The first emission wavelength may be 300nm to 320nm, the second emission wavelength may be 355nm to 375nm, and the third emission wavelength may be 395nm to 415nm. Since the wavelength at which the elapsed rapidly progresses is different depending on the type of resin, the resin can be rapidly cured by selectively or simultaneously irradiating a plurality of wavelengths.

The power supply unit 182 may apply power to the plurality of ultraviolet light emitting devices 133. The power supply unit 182 may apply power as a whole or sequentially apply power to the plurality of ultraviolet light emitting devices 133.

In this case, the illuminance sensor (not shown) may measure the illuminance of light emitted from the plurality of ultraviolet light emitting devices 133. Therefore, when the illuminance of light emitted from some of the ultraviolet light emitting devices 133 is lowered, it may be determined as defective and a replacement alarm may be output.

When it is determined that the illuminance of some of the ultraviolet light emitting elements 133 is low, the second control unit 190 may increase the current value of the corresponding light emitting element 133 to maintain the total illuminance constant. In addition, when the temperature of the fixed module 130 rapidly increases by a temperature sensor (not shown), the second control unit 190 outputs an operation stop alarm to the outside and executes a protection program for the safety of the light emitting device. have. For example, the protection program for safety may be an algorithm that forcibly circulates coolant or prohibits restart for a certain period of time. In addition, the second control unit 190 may control each component to operate the laminating apparatus.

The panel clamp 140 may press the side surface of the panel 13 and bend the panel 13 to be convex toward the window 11. At this time, the panel 13 may be bent only by the panel clamp 140, or the panel 13 may be bent while the panel clamp 140 bends the panel 13 and the pressure pad 120 pushes upward.

In this case, as described above, when the edge of the adhesive layer 12 is formed relatively thick, when the panel 13 and the adhesive layer 12 are bent, the thickness of the adhesive layer 12 may be relatively constant.

Referring to FIG. 12, as the pressure pad 120 rises, the convex point of the panel 13 may contact the window 11. According to the embodiment, since the window 11 and the panel 13 are entirely bonded by the adhesive layer 12, bubbles may be formed when the window 11 and the panel 13 are entirely in contact with each other from the beginning. Therefore, in the initial contact, it is advantageous in terms of suppressing bubble generation to control the convex point of the panel 13 to first contact the window 11.

Referring to FIG. 13, while the pressing pad 120 is spread by pressing, the window 11 and the panel 13 may be entirely bonded. Since the pressure pad 120 presses while the convex point of the panel 13 is in contact with the window 11, the air between the window 11 and the panel 13 goes to both sides based on the convex point of the panel 13. It is discharged so that air bubbles can be effectively removed.

Since the pressing pad 120 presses the window 11 and the panel 13 to be entirely bonded together, the curved portion of the window 11 and the curved portion of the panel 13 may also be pressed. However, if the adhesive force of the adhesive layer 12 is insufficient, the curved portion of the window 11 and the curved portion of the panel 13 may fall off again.

Therefore, in the embodiment, after the window 11 and the panel 13 are entirely bonded by the pressure pad 120, the adhesive layer 12 may be secondary temporary cured by irradiating ultraviolet rays by the ultraviolet light emitting device 133. . As a result, the adhesive strength of the adhesive layer 12 increases, and the window 11 and the panel 13 can be sufficiently fixed so that they do not fall off. Accordingly, it is possible to solve the problem that the window 11 and the panel 13 fall before the adhesive layer 12 is completely cured. In this case, the entire area of the adhesive layer 12 may be secondary temporary curing, or only a partial area (eg, a curved area) may be secondary temporary curing.

Secondary temporary hardening can be defined as a state with a degree of hardening higher than that of the first temporary hardening and lower than that of complete hardening. For example, the secondary temporary curing may be defined as a temporary curing state of 81% to 95% based on 100% curing. Accordingly, the degree of hardening of the secondary temporary hardening may be 101% to 158% of the first temporary hardening. In this case, the adhesive strength may be improved enough to prevent the window 11 and the panel 13 from falling, and may be temporarily cured to remove air bubbles. This is because if the adhesive layer is cured higher than 95%, it may be impossible to remove the air bubbles inside.

When the bonding of the window 11 and the panel 13 is completed, the assembly of the window and the panel may be transferred by a separate transfer member (eg, a robot arm) to undergo a bubble removal process. Since the adhesive layer 12 is still a temporary curing step, fine bubbles remaining therein can be removed through the bubble removal process. Accordingly, light reflectance and light extraction efficiency can be improved. As for the bubble removal process, all of a variety of known methods can be applied. Exemplarily, the bubble removing process may remove bubbles inside the adhesive by controlling temperature and/or pressure.

Thereafter, when it is determined that the window 11 and the panel 13 are aligned and bonded and the air bubbles are removed, the adhesive layer 12 may be completely cured.

Referring to FIG. 14, when a curvature is formed at the edge of the window 11, the panel 13 is attached along the curvature of the window 11, and the adhesive 12 between the window 11 and the panel 13 is uniform. It can be seen that it has one thickness.

Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art will variously modify and change the present invention within the scope not departing from the spirit and scope of the present invention described in the following claims. You will understand that you can do it.

Claims (10)

An application device for forming an adhesive layer on the first object;
A supply device for providing a second object; And
Including a bonding device for bonding the first object and the second object,
The application device,
A spray unit including a plurality of ink jet heads for forming the adhesive layer by spraying adhesive droplets on the first object;
A curing unit for primary temporary curing of the adhesive layer; And
Including a first control unit for controlling the injection unit and the curing unit,
The first control unit controls to form a first adhesive layer by spraying adhesive droplets from the plurality of inkjet heads, and controls the curing unit to first temporarily cure the first adhesive layer as a whole,
The first control unit controls the plurality of inkjet heads to form a second adhesive layer on the first temporary cured adhesive layer,
The first control unit selectively drives the plurality of inkjet heads so that the second adhesive layer has a predetermined shape,
The first control unit controls the curing unit to first temporarily cure the second adhesive layer,
The curing unit includes a plurality of ultraviolet light emitting devices arranged in a matrix form,
The first control unit is a laminating system for selectively driving only ultraviolet light emitting devices overlapping the second adhesive layer in a vertical direction.
The method of claim 1,
The curing unit includes a first ultraviolet light source having a predetermined irradiation angle and a second ultraviolet light source having an irradiation angle smaller than that of the first ultraviolet light source,
When the first adhesive layer is applied on the first object by the plurality of inkjet heads, the first ultraviolet light source first temporarily cures the first adhesive layer as a whole,
When a second adhesive layer is selectively applied to a partial region of the first adhesive layer, the second ultraviolet light source selectively first temporarily cures the second adhesive layer.
The method of claim 1,
The bonding device,
A fixing module fixing the second object; And
Including a pressure pad disposed to face the fixed module,
The fixing module is a laminating system including a suction channel for fixing the second object and a plurality of light sources for irradiating ultraviolet light to the second object.
The method of claim 3,
And a clamp for fixing the first object to which the adhesive layer is applied,
The first object is a laminating system disposed between the fixing module and the pressure pad.
The method of claim 4,
The bonding device secondary temporary hardening of the adhesive layer after the first object and the second object are bonded,
The second temporary hardening is 101% to 158% of the first temporary hardening of the laminating system.
An application device for forming an adhesive layer on the first object;
A supply device for providing a second object; And
Including a bonding device for bonding the first object and the second object,
The application device,
A spray unit including a plurality of ink jet heads for forming the adhesive layer by spraying adhesive droplets on the first object;
A curing unit for primary temporary curing of the adhesive layer; And
Including a first control unit for controlling the injection unit and the curing unit,
The first control unit controls to form a first adhesive layer by spraying adhesive droplets from the plurality of inkjet heads, and controls the curing unit to first temporarily cure the first adhesive layer as a whole,
The curing unit includes a first ultraviolet light source having a predetermined irradiation angle and a second ultraviolet light source having an irradiation angle smaller than that of the first ultraviolet light source,
When the first adhesive layer is applied on the first object by the plurality of inkjet heads, the first ultraviolet light source first temporarily cures the first adhesive layer as a whole,
When a second adhesive layer is selectively applied to a partial region of the first adhesive layer, the second ultraviolet light source selectively first temporarily cures the second adhesive layer. delete delete delete delete

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