Lamination device, lamination method, and manufacturing method of display device including same

Abstract

A lamination device according to one embodiment of the present invention comprises a support, a display module disposed on the support and having a bending area and a non-bending area defined therein, a guide film disposed between the support and the display module, and an adhesive layer disposed between the display module and the guide film, wherein the adhesive layer comprises a first portion overlapping with the bending area of ​​the display module and a second portion overlapping with the non-bending area, wherein the first portion is not adhered to the guide film and the second portion is adhered to the guide film.

Description

Technology Field

[0001] The present invention relates to a lamination device, a lamination method, and a method for manufacturing a display device including the same, and more specifically, to a lamination device, a lamination method, and a method for manufacturing a display device including the same that can prevent defects in a display panel. Background Technology

[0002] Electronic devices that provide video to users, such as smartphones, digital cameras, laptop computers, navigation systems, and smart televisions, include a display device for displaying video. The display device generates video and provides it to the user through a display screen.

[0003] With the recent technological advancement of display devices, various types of display devices are being developed. For example, display devices capable of displaying images not only on the front but also on the rear and sides are being developed.

[0004] The display device includes a display panel for displaying images and a window disposed on the display panel to protect the display panel. To display images on the front, rear, and sides of the display device, the display panel and the window may be molded to be disposed along the front, rear, and sides of the display device. The problem to be solved

[0005] The objective of the present invention is to provide a lamination device capable of preventing cracks caused by the curvature of a bending portion of a display panel, a lamination method, and a method for manufacturing a display device including the same. means of solving the problem

[0006] Among the embodiments, the lamination device comprises a display module having a defined bending area and a non-bending area, a guide film disposed on one side of the display module, and an adhesive layer disposed between the display module and the guide film, wherein the adhesive layer comprises a first portion overlapping the bending area of ​​the display module and a second portion overlapping the non-bending area, and the first portion may not be adhered to the guide film and the second portion may be adhered to the guide film.

[0007] The above display module may include a protective film disposed on the guide film, a display panel disposed on the protective film, and an anti-reflective film disposed on the display panel.

[0008] The adhesive layer is disposed between the protective film and the guide film and can be adhered to the lower surface of the protective film.

[0009] A neutral plane is defined on the bending region of the display module, and the neutral plane can be defined on the display panel in cross-section.

[0010] The above adhesive layer may include a UV-curing adhesive.

[0011] The above guide film may include a material that transmits ultraviolet rays.

[0012] It further includes an adhesive film disposed on the above-mentioned display module, and the thickness of the adhesive film may be greater than the thickness of the anti-reflective film.

[0013] The above-mentioned display module may further include a support member that supports the above-mentioned display module, wherein the support member comprises a support portion having a plurality of through holes defined therein, a diaphragm disposed on the support portion and covering the support portion, and a pressure pad disposed on the diaphragm on the upper surface of the support portion, and the pressure pad may comprise a pad portion and at least one support bar disposed within the pad portion and extending in a first direction.

[0014] The above pressure pad supports the bending area of ​​the display module, and the diaphragm can support the non-bending area of ​​the display module.

[0015] The window fixing chuck is further included to fix the window, and the window fixing chuck has a window fixing groove facing the pressure pad, and the display module can be disposed between the pressure pad and the window fixing groove.

[0016] Among the embodiments, the lamination method may include the steps of: providing a display module including a display panel that displays an image, wherein a bending region and a non-bending region adjacent to the bending region are defined; placing an adhesive layer on the lower surface of the display module, the adhesive layer including a first portion that overlaps the bending region and a second portion that overlaps the non-bending region; placing a guide film on the lower surface of the adhesive layer; and removing the first portion of the adhesive layer.

[0017] The step of removing the first portion of the adhesive layer may include the step of removing the adhesive force of the first portion.

[0018] The above adhesive layer comprises a UV-curing adhesive, and the step of removing the adhesive force of the first portion of the adhesive layer may further include the step of irradiating the first portion with ultraviolet light.

[0019] The guide film comprises a curved portion that is bonded to the first portion of the adhesive layer and a flat portion that is bonded to the second portion, and the step of removing the adhesive force of the first portion may include the step of detaching the first portion of the adhesive layer and the curved portion of the guide film from each other.

[0020] The step of providing the above-mentioned display module may include the step of providing the above-mentioned display panel and the step of attaching an adhesive film on the upper surface of the above-mentioned display panel.

[0021] The method may further include the step of providing a support comprising a pressure pad supporting the bending region of the above-mentioned display module and a support member supporting the above-mentioned non-bending region.

[0022] The guide film is positioned between the support and the display module so that the display module can be seated on the support.

[0023] The method may further include the steps of placing a window on the adhesive film in which a folding area overlapping with the bending area of ​​the display module and a non-folding area overlapping with the non-bending area are defined, and removing the guide film from the display module.

[0024] The step of removing the guide film from the display module may include a first step of detaching the guide film from the bending area of ​​the display module and a second step of detaching the guide film from the non-bending area of ​​the display module.

[0025] The step of removing the guide film may further include the step of removing the adhesive force of the second portion of the adhesive layer.

[0026] The step of removing the guide film may further include the step of inserting a rod tube in a first direction between the bending area of ​​the display module and the guide film, the step of inflating the rod tube, and the step of moving the inflated rod tube in a direction perpendicular to the first direction and away from the bending area.

[0027] The adhesive layer comprises a UV-curing adhesive, and the step of removing the adhesive force of the second part may include the step of irradiating the second part with ultraviolet light.

[0028] Among the embodiments, a method for manufacturing a display device comprises the steps of: preparing a display panel having a bending portion and a non-bending portion adjacent to the bending portion, wherein an adhesive film is attached to the upper surface and a guide film is attached to the lower surface; detaching the guide film from the bending portion; preparing a diaphragm disposed on a support portion and covering the support portion, and a pressure pad disposed on the diaphragm on the upper surface of the support portion; placing the display panel on the sides of the diaphragm adjacent to the sides of the support portion and on the pressure pad; placing a window in a groove of a window fixing chuck on the pressure pad; placing the diaphragm and the pressure pad in the groove; moving the window fixing chuck downward to press the pressure pad, thereby attaching the bending portion of the display panel placed on the pressure pad to the folding portion of the window adjacent to the bending portion; and expanding the diaphragm so that the non-bending portions of the display panel extending downward from the bending portion and adjacent to the sides of the diaphragm, the It may include a step of attaching to the non-folding parts of the window adjacent to the non-bending parts. Effects of the invention

[0029] A lamination device, a lamination method, and a method for manufacturing a display device including the same according to one embodiment of the present invention can reduce the tension of the bending portion of a display panel according to the modulus of the guide film by removing an adhesive layer between the bending portion of the display panel and the guide film. Accordingly, the occurrence of defects in the display panel can be reduced. Brief explanation of the drawing

[0030] FIG. 1 is a perspective view of a lamination facility according to one embodiment of the present invention. Figure 2 is a drawing showing a display panel and a window that are bonded together through the lamination equipment shown in Figure 1. FIG. 3 is a drawing exemplarily illustrating a cross-section of the display panel shown in FIG. 2. FIG. 4 is a diagram exemplarily illustrating a cross-section of a pixel disposed in the circuit element layer and the display element layer illustrated in FIG. 3. FIG. 5 is a perspective view of the diaphragm and the support member disposed inside the diaphragm shown in FIG. 1. FIG. 6 is a perspective view of a pressure pad illustrated in FIG. 1, enlarged. Figure 7 is a cross-sectional view of the line I-I' shown in Figure 5. FIG. 8a is a cross-sectional view of the line II-II' shown in FIG. 5. FIG. 8b is a drawing illustrating the shape of a cavity according to another embodiment of the present invention. FIGS. 9A and FIGS. 9B are drawings illustrating a lamination device according to an embodiment of the present invention. FIGS. 10a and FIGS. 10e are drawings illustrating a lamination method according to an embodiment of the present invention. FIGS. 11 to 17 are drawings for explaining a method of manufacturing a display device using a lamination facility including a lamination device. FIG. 18 is a drawing illustrating a panel support for being combined with a display panel and a window. FIG. 19 is a drawing illustrating a display device manufactured by a display panel, a window, and a panel support combined with each other. FIGS. 20a to 20c are drawings showing the step of removing a guide film according to one embodiment of the present invention. Specific details for implementing the invention

[0031] In this specification, where a component (or region, layer, part, etc.) is described as being “on,” “connected,” or “joined” another component, it means that it may be directly placed / connected / joined on the other component, or that a third component may be placed between them.

[0032] Identical reference numerals denote identical components. Additionally, in the drawings, the thicknesses, proportions, and dimensions of components are exaggerated for the effective illustration of the technical content. “And / or” includes all one or more combinations that the associated components may define.

[0033] Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. A singular expression includes a plural expression unless the context clearly indicates otherwise.

[0034] Additionally, terms such as “below,” “lower,” “above,” and “upper” are used to describe the relationships between the components depicted in the drawings. These terms are relative concepts and are described based on the directions indicated in the drawings.

[0035] Terms such as "include" or "have" are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0036] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Additionally, terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and are explicitly defined herein unless interpreted in an ideal or overly formal sense.

[0037] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0038] FIG. 1 is a perspective view of a lamination facility according to one embodiment of the present invention.

[0039] Referring to FIG. 1, a lamination facility (BOD) according to one embodiment of the present invention may include a stage (STG), a diaphragm (DPM), a pressure pad (PPD), a plurality of columns (COL1, COL2), a plurality of tensioning parts (TNP), a plurality of first moving parts (MOV1), a second moving part (MOV2), a plurality of third moving parts (MOV3), a plurality of rollers (ROL), a plurality of roller support parts (RSP), and a window fixing chuck (FCK).

[0040] The stage (STG) may have a plane defined by a first direction (DR1) and a second direction (DR2) intersecting the first direction (DR1). Columns (COL1, COL2) may be placed on the stage (STG) and extend into a third direction (DR3).

[0041] The third direction (DR3) may be defined as a direction that intersects substantially perpendicularly with the plane defined by the first direction (DR1) and the second direction (DR2). Hereinafter, in this specification, upward, up, down, upper direction, and lower direction, etc., may refer to the relative positions and directions of the components with respect to the third direction (DR3). Additionally, the meaning of "when viewed in a plane" may refer to the state viewed from the third direction (DR3).

[0042] The columns (COL1, COL2) may include a plurality of first columns (COL1) and a plurality of second columns (COL2). The first columns (COL1) may be positioned between the second columns (COL2). The first columns (COL1) may be arranged in a first direction (DR1) and may face each other in the first direction (DR1).

[0043] Second columns (COL2) may be placed on opposite sides of the stage (STG) in a first direction (DR1). The second columns (COL2) may be arranged in the first direction (DR1) and face each other in the first direction (DR1). In the third direction (DR3), the lengths of the second columns (COL2) may be longer than the lengths of the first columns (COL1).

[0044] The diaphragm (DPM) can be placed on the stage (STG). Although not shown, a support member may be placed within the diaphragm (DPM), and the configuration of the support member will be described below in 5. The diaphragm (DPM) can be placed between the first columns (COL1).

[0045] The pressure pad (PPD) can be placed on the diaphragm (DPM). The pressure pad (PPD) can extend in a first direction (DR1), be placed on the first columns (COL1), and be connected to the second columns (COL2).

[0046] The tension members (TNP) can be positioned to face opposite sides of the stage (STG) in the second direction (DR2). The tension members (TNP) can be extended in the first direction (DR1).

[0047] First moving parts (MOV1) may be positioned between the tension parts (TNP) and the opposite sides of the stage (STG) in the second direction (DR2). The first moving parts (MOV1) may be inserted into the recesses (RES1) defined on the opposite sides of the stage (STG) in the second direction (DR2) and move in the second direction (DR2). The first moving parts (MOV1) may be connected to the tension parts (TNP) to move the tension parts (TNP) in the second direction (DR2).

[0048] Although not illustrated, drive units for driving the first moving parts (MOV1) may be placed within the stage (STG), but the location of the drive units is not limited thereto.

[0049] The second moving part (MOV2) may have a frame shape. For example, the second moving part (MOV2) may have a rectangular frame shape, but the shape of the second moving part (MOV2) is not limited thereto. The second moving part (MOV2) may be connected to the second columns (COL2). The second moving part (MOV2) may be connected to the outer sides of the second columns (COL2) opposite to the inner sides of the second columns (COL2) facing each other. The second moving part (MOV2) may move in a third direction (DR3).

[0050] Although not illustrated, drive units for driving the second moving part (MOV2) may be placed within the second columns (COL2), but the location of the drive units is not limited thereto.

[0051] The third moving parts (MOV3) may be arranged to extend in the first direction (DR1) and face each other in the second direction (DR2). The third moving parts (MOV3) may be connected to the inner surfaces of the second moving parts (MOV2) facing each other in the first direction (DR1). The third moving parts (MOV3) may be adjacent to the inner surfaces of the second moving parts (MOV2) facing each other in the first direction (DR1). The third moving parts (MOV3) may move in the second direction (DR2).

[0052] Although not illustrated, drive units for driving the third moving parts (MOV3) may be placed within the second moving part (MOV2), but the location of the drive units is not limited thereto.

[0053] The roller support members (RSP) can be extended in a second direction (DR2). The roller support members (RSP) can be connected to third moving members (MOV3). The roller support members (RSP) connected to each of the third moving members (MOV3) can be positioned in a first direction (DR1).

[0054] Each roller (ROL) may be positioned between roller supports (RSP) connected to each of the third moving parts (MOV3) and connected to the roller supports (RSP). The rollers (ROL) may have a cylindrical shape extending in a first direction (DR1). The rollers (ROL) may face each other in a second direction (DR2). The rollers (ROL) may move in the second direction (DR2) by the third moving parts (MOV3) and may move in the third direction (DR3) by the second moving part (MOV2).

[0055] The rollers (ROL) are connected to the roller supports (RSP) and can rotate. For example, the rollers (ROL) can rotate around a rotation axis parallel to the first direction (DR1). The rollers (ROL) can move along the roller supports (RSP) in the second direction (DR2).

[0056] The window fixing chuck (FCK) may be positioned above the pressure pad (PPD). A groove (GOV) extending in a first direction (DR1) may be defined in the window fixing chuck (FCK). The end inside the groove (GOV) may have a concave shape.

[0057] FIG. 2 is a schematic diagram illustrating a display panel and a window that are bonded together through the lamination equipment shown in FIG. 1.

[0058] For example, the display panel (DP) and window (WIN) shown in FIG. 2 are shown as a side view from the first direction (DR1).

[0059] Referring to FIG. 2, in a lamination facility (BOD), a display panel (DP) to be bonded to a window (WIN) is placed on a pressure pad (PPD) and a diaphragm (DPM), and the window (WIN) can be placed in a groove (GOV) of a window fixing chuck (FCK). The shape of the display panel (DP) placed on the pressure pad (PPD) and the diaphragm (DPM) and the shape of the window (WIN) placed in the groove (GOV) of the window fixing chuck (FCK) will be shown below in FIG. 14.

[0060] The display panel (DP) is not placed directly on the pressure pad (PPD) and diaphragm (DPM), but can be placed on the pressure pad (PPD) and diaphragm (DPM) through a guide film (GFM). For example, a guide film (GFM) may be prepared, and the display panel (DP) may be placed on the guide film (GFM). The guide film (GFM) may be placed on the pressure pad (PPD) and diaphragm (DPM).

[0061] The guide film (GFM) may include a flexible plastic material. For example, the guide film (GFM) may include a plastic material such as polyimide (PI) or polyethyleneterephthalate (PET).

[0062] The display panel (DP) may be a flexible display panel. The display panel (DP) according to one embodiment of the present invention may be a light-emitting display panel, but is not particularly limited. For example, the display panel (DP) may be an organic light-emitting display panel or a quantum dot light-emitting display panel. The light-emitting layer of the organic light-emitting display panel may include an organic light-emitting material. The light-emitting layer of the quantum dot light-emitting display panel may include quantum dots and quantum rods, etc. Hereinafter, the display panel (DP) is described as an organic light-emitting display panel.

[0063] A window (WIN) may be placed on a display panel (DP). The window (WIN) may include glass. The window (WIN) may be defined as Ultra Thin Glass (UTG). Ultra Thin Glass is tempered glass and can have strong durability so that it does not easily break even when bent.

[0064] The window (WIN) may include a synthetic resin film in addition to glass. Additionally, the window (WIN) may have a multilayer structure or a single layer structure. For example, the window (WIN) may include a plurality of synthetic resin films bonded by an adhesive, or a glass substrate and a synthetic resin film bonded by an adhesive.

[0065] An adhesive film (ADF) may be placed between the display panel (DP) and the window (WIN). The adhesive film (ADF) may include an optically clear adhesive (OCA), but the type of adhesive film (ADF) is not limited thereto.

[0066] An adhesive film (ADF) can be placed first on the upper surface of a display panel (DP). After the adhesive film (ADF) is attached first to the upper surface of the display panel (DP), a window (WIN) can be attached to the adhesive film (ADF). That is, the display panel (DP) and the window (WIN) can be bonded together by the adhesive film (ADF). To bond the display panel (DP) and the window (WIN) together, a lamination facility (BOD) illustrated in FIG. 1 can be used.

[0067] After the display panel (DP) and the window (WIN) are bonded together, the guide film (GFM) can be separated from the display panel (DP). Although not illustrated, an adhesive layer for attaching the guide film (GFM) to the display panel (DP) may be placed between the guide film (GFM) and the display panel (DP). The window (WIN) bonded to the display panel (DP) can protect the display panel (DP) from external scratches and impacts.

[0068] Although not shown, an input detection unit for detecting external input and an anti-reflection layer for preventing reflection of external light may be further disposed between the display panel (DP) and the window (WIN).

[0069] FIG. 3 is a diagram illustrating an exemplary cross-section of a display panel shown in FIG. 2. FIG. 4 is a diagram illustrating an exemplary cross-section of a pixel disposed in the circuit element layer and the display element layer shown in FIG. 3.

[0070] Referring to FIG. 3, the display panel (DP) may include a substrate (SUB), a circuit element layer (DP-CL) disposed on the substrate (SUB), a display element layer (DP-OLED) disposed on the circuit element layer (DP-CL), and a thin film encapsulation layer (TFE) disposed on the display element layer (DP-OLED).

[0071] The substrate (SUB) may include a display area (DA) and a non-display area (NDA) around the display area (DA). The substrate (SUB) may include a flexible plastic material such as polyimide (PI). A display element layer (DP-OLED) may be placed on the display area (DA).

[0072] Multiple pixels may be disposed in the circuit element layer (DP-CL) and the display element layer (DP-OLED). Each pixel may include a transistor disposed in the circuit element layer (DP-CL) and a light-emitting element disposed in the display element layer (DP-OLED) and connected to the transistor.

[0073] A thin film encapsulation layer (TFE) can be disposed on a circuit element layer (DP-CL) to cover a display element layer (DP-OLED). The thin film encapsulation layer (TFE) may include inorganic layers and an organic layer between the inorganic layers. The inorganic layers can protect the pixels from moisture / oxygen. The organic layer can protect the pixels from foreign substances such as dust particles.

[0074] Referring to FIG. 4, a pixel (PX) may include a transistor (TR) and a light-emitting element (OLED). The light-emitting element (OLED) may include a first electrode (AE), a second electrode (CE), a hole control layer (HCL), an electron control layer (ECL), and a light-emitting layer (EML). The first electrode (AE) may be an anode electrode, and the second electrode (CE) may be a cathode electrode.

[0075] A transistor (TR) and a light-emitting element (OLED) may be disposed on a substrate (SUB). Although one transistor (TR) is illustrated as an example, substantially, a pixel (PX) may include a plurality of transistors for driving a light-emitting element (OLED) and at least one capacitor. A display area (DA) may include a light-emitting area (PA) on which a light-emitting element (OLED) is disposed and a non-light-emitting area (NPA) around the light-emitting area (PA).

[0076] A buffer layer (BFL) is disposed on a substrate (SUB), and the buffer layer (BFL) may be an inorganic layer. A semiconductor pattern may be disposed on the buffer layer (BFL). The semiconductor pattern may include polysilicon. However, it is not limited thereto, and the semiconductor pattern may include amorphous silicon or a metal oxide.

[0077] The semiconductor pattern can be doped with an N-type or P-type dopant. The semiconductor pattern may include high-doping regions and low-doping regions. The conductivity of the high-doping region is greater than that of the low-doping region and can substantially serve as the source and drain of the transistor (TR). The low-doping region can substantially correspond to the active (or channel) of the transistor.

[0078] The source (S), active (A), and drain (D) of the transistor (TR) can be formed from a semiconductor pattern. A first insulating layer (INS1) can be disposed on the semiconductor pattern. The gate (G) of the transistor (TR) can be disposed on the first insulating layer (INS1).

[0079] A second insulating layer (INS2) may be disposed on the gate (G). A third insulating layer (INS3) may be disposed on the second insulating layer (INS2). A connecting electrode (CNE) for connecting the transistor (TR) and the light-emitting element (OLED) may be disposed between the transistor (TR) and the light-emitting element (OLED). The connecting electrode (CNE) may include a first connecting electrode (CNE1) and a second connecting electrode (CNE2) disposed on the first connecting electrode (CNE1).

[0080] A first connecting electrode (CNE1) is disposed on a third insulating layer (INS3) and can be connected to a drain (D) through a first contact hole (CH1) defined in the first to third insulating layers (INS1 to INS3). A fourth insulating layer (INS4) can be disposed on the first connecting electrode (CNE1). A fifth insulating layer (INS5) can be disposed on the fourth insulating layer (INS4). A second connecting electrode (CNE2) can be disposed on the fifth insulating layer (INS5). The second connecting electrode (CNE2) can be connected to the first connecting electrode (CNE1) through a second contact hole (CH2) defined in the fifth insulating layer (INS5).

[0081] A sixth insulating layer (INS6) may be disposed on the second connecting electrode (CNE2). The layers from the buffer layer (BFL) to the sixth insulating layer (INS6) may be defined as circuit element layers (DP-CL). The first insulating layer (INS1) to the sixth insulating layer (INS6) may be inorganic layers or organic layers.

[0082] A first electrode (AE) may be disposed on the sixth insulating layer (INS6). The first electrode (AE) may be connected to a second connecting electrode (CNE2) through a third contact hole (CH3) defined in the sixth insulating layer (INS6). A pixel defining film (PDL) that exposes a predetermined portion of the first electrode (AE) may be disposed on the first electrode (AE) and the sixth insulating layer (INS6). An opening (PX_OP) for exposing a predetermined portion of the first electrode (AE) may be defined in the pixel defining film (PDL).

[0083] A hole control layer (HCL) may be disposed on a first electrode (AE) and a pixel defining film (PDL). The hole control layer (HCL) may be disposed in common in the light-emitting region (PA) and the non-light-emitting region (NPA). The hole control layer (HCL) may include a hole transport layer and a hole injection layer.

[0084] The emitting layer (EML) may be disposed on the hole control layer (HCL). The emitting layer (EML) may be disposed in the region corresponding to the aperture (PX_OP). The emitting layer (EML) may comprise organic and / or inorganic materials. The emitting layer (EML) may generate any one of red, green, and blue light.

[0085] The electronic control layer (ECL) may be disposed on the emitting layer (EML) and the hole control layer (HCL). The electronic control layer (ECL) may be disposed in common in the emitting region (PA) and the non-emitting region (NPA). The electronic control layer (ECL) may include an electron transport layer and an electron injection layer.

[0086] The second electrode (CE) may be placed on the electronic control layer (ECL). The second electrode (CE) may be placed in common with the pixels. The thin film encapsulation layer (TFE) may be placed on the light-emitting element (OLED). The layer on which the light-emitting element (OLED) is placed may be defined as a display layer (DP-OLED).

[0087] A first voltage is applied to a first electrode (AE) through a transistor (TR), and a second voltage having a level lower than the first voltage can be applied to a second electrode (CE). Holes and electrons injected into the light-emitting layer (EML) combine to form excitons, and as the excitons transition to a ground state, the light-emitting element (OLED) can emit light.

[0088] FIG. 5 is a perspective view of the stage, diaphragm, and support member disposed inside the diaphragm shown in FIG. 1.

[0089] Referring to FIG. 5, a recess (RES) may be defined on the upper surface of the stage (STG). A plurality of air injection holes (AIH) may be defined in the recess (RES).

[0090] The support member (SUP) may be placed on the stage (STG). The lower part of the support member (SUP) may be placed in the recess (RES). The support member (SUP) may extend in a first direction (DR1) and a third direction (DR3). The support member (SUP) may have a plate shape defined by the first direction (DR1) and the third direction (DR3). The upper surface of the support member (SUP) may have a plane defined by the first and second directions (DR1, DR2). The upper surface of the support member (SUP) may extend further in the first direction (DR1) than in the second direction (DR2).

[0091] The support member (SUP) is formed as a rigid type and may include stainless steel. With respect to the first and second directions (DR1, DR2), the lower part of the support member (SUP) may have a greater width than other parts of the support member (SUP).

[0092] Multiple through holes (AH) may be defined in the support member (SUP). The through holes (AH) may be defined on opposite sides of the support member (SUP) in a second direction (DR2).

[0093] The diaphragm (DPM) may be placed on the support (SUP) to cover the support (SUP). The structure in which the diaphragm (DPM) covers the support (SUP) will be illustrated in FIGS. 7 and FIGS. 8 below. The diaphragm (DPM) may include a material that has elasticity and can expand by an external force. For example, the diaphragm (DPM) may include silicone.

[0094] The diaphragm (DPM) may include a cover portion (COV) for covering the support portion (SUP) and a connection portion (CNP) extending from the bottom of the cover portion (COV). The connection portion (CNP) may extend in first and second directions (DR1, DR2). A plurality of fastening holes (CPH) may be defined in the connection portion (CNP).

[0095] FIG. 6 is a perspective view of a pressure pad illustrated in FIG. 1, enlarged.

[0096] Referring to FIG. 6, the pressure pad (PPD) may include a pad (PD) extending in a first direction (DR1) and a plurality of support bars (SB1, SB2) disposed within the pad (PD) and extending in the first direction (DR1).

[0097] When viewed from the first direction (DR1), the pad (PD) may have a tower shape having a major axis extending approximately in the third direction (DR3). When viewed from the first direction (DR1), the upper surface of the pad (PD) may have a convex curve facing upward. When viewed from the first direction (DR1), the lower surface of the pad (PD) may have a convex curve facing downward.

[0098] The pad (PD) has elasticity and can be deformed by an external force. For example, the pad (PD) may include silicone that has elasticity and can be deformed by an external force. The pad (PD) may be supported by support bars (SB1, SB2).

[0099] The support bars (SB1, SB2) may have a cylindrical shape extending in the first direction (DR1), but the shape of the support bars (SB1, SB2) is not limited thereto. The support bars (SB1, SB2) may extend outside the pad (PD). For example, the support bars (SB1, SB2) may extend longer than the pad (PD) in the first direction (DR1). Two support bars (SB1, SB2) are illustrated as examples, but the number of support bars is not limited thereto.

[0100] The support bars (SB1, SB2) may have greater rigidity than the pad (PD). The support bars (SB1, SB2) may include a metal that has greater rigidity than the pad (PD). For example, the support bars (SB1, SB2) may include stainless steel. The support bars (SB1, SB2) may be placed within the pad (PD) to support the pad (PD).

[0101] Pads (PD) and support bars (SB1, SB2) may be placed between the second columns (COL2). The support bars (SB1, SB2) may extend in a first direction (DR1) and be placed on the first columns (COL1) and connected to the second columns (COL2). The support bars (SB1, SB2) may be connected to the inner sides of the second columns (COL2) facing each other that are placed on the first columns (COL1).

[0102] Both sides of the support bars (SB1, SB2) may be connected to and fixed to the second columns (COL). However, one embodiment of the present invention may not be limited thereto. For example, both sides of the support bars (SB1, SB2) may be connected to the second columns (COL) and moved in a third direction (DR3) by a predetermined distance. For this configuration, elastic members that cushion vertically may be disposed on the second columns (COL) and connected to both sides of the support bars (SB1, SB2).

[0103] The pad (PD) may not be connected to the first columns (COL1). The pad (PD) may be supported by support bars (SB1, SB2) connected to the second columns (COL2).

[0104] Support bars (SB1, SB2) may include a first support bar (SB1) extending in a first direction (DR1) and a second support bar (SB2) extending in the first direction (DR1) and positioned on the first support bar (SB1). The size of the first support bar (SB1) may differ from the size of the second support bar (SB2). The size may be defined by the diameters of the first support bar (SB1) and the second support bar (SB2).

[0105] FIG. 7 is a cross-sectional view along the line I-I' shown in FIG. 5. FIG. 7 illustrates a support (SUF) that supports a display panel and a guide film.

[0106] For example, FIG. 7 also shows a cross-sectional view of the stage (STG) shown in FIG. 1 and the pressure pad (PPD) shown in FIG. 6.

[0107] Referring to FIG. 7, the support (SUF) may include a support member (SUP), a diaphragm (DPM), and a pressure pad (PPD). The diaphragm (DPM) and the pressure pad (PPD) may be placed on the support member (SUP). The pressure pad (PPD) may be placed on the diaphragm (DPM) on the upper surface of the support member (SUP). First and second support bars (SB1, SB2) may be placed within the pad (PD) to support the pad (PD).

[0108] The support member (SUP) and the diaphragm (DPM) may be placed on the stage (STG). The lower part of the support member (SUP) may be placed in a recess (RES) defined on the stage (STG). A cavity (CVT) may be defined within the support member (SUP). The cavity (CVT) may be opened downward within the support member (SUP). The cavity (CVT) may be defined as a main air passage formed within the support member (SUP) by extending in a third direction (DR3). The cavity (CVT) may be an air passage. For example, the cavity (CVT) may extend in the third direction (DR3), but is not limited thereto, and the cavity (CVT) may also extend upward at a predetermined angle of inclination with respect to the third direction (DR3).

[0109] The through holes (AH) can extend from the cavity (CVT) toward the opposing sides of the support members (SUP) in the second direction (DR2). Thus, the through holes (AH) can be defined on the opposing sides of the support members (SUP) in the second direction (DR2).

[0110] For example, the through holes (AH) may extend in a second direction (DR2). However, not limited thereto, the through holes (AH) may extend toward both sides of the support member (SUP) at a predetermined angle of inclination with respect to the second direction (DR2). The through holes (AH) may be defined as sub-air passages extending in the second direction (DR2). The through holes (AH) may be air passages.

[0111] The air injection hole (AIH) defined by the recess (RES) may extend in a third direction (DR3). When viewed from the third direction (DR3), the air injection hole (AIH) may overlap with the cavity (CVT). The air injection hole (AIH) may be defined as an air injection passage through which air passes.

[0112] Air (AIR) may be supplied to the air injection hole (AIH), cavity (CVT), and through holes (AH), but the present invention is not limited thereto. For example, various gases or various fluids including air may be supplied to the air injection hole (AIH), cavity (CVT), and through holes (AH).

[0113] The diaphragm (DPM) can be connected to the stage (STG) after covering the support (SUP). The cover (COV) can cover the support (SUP). The connection (CNP) can be connected to the stage (STG) by extending parallel to the stage (STG) from the bottom of the cover (COV). To connect the connection (CNP) to the stage (STG), multiple fastening units (CU) can be placed in fastening holes (CPH) to be connected to the stage (STG).

[0114] When viewed from the first direction (DR1), the cross-sectional size of the first support bar (SB1) may differ from the cross-sectional size of the second support bar (SB2). For example, the cross-sectional size of the first support bar (SB1) may be larger than the cross-sectional size of the second support bar (SB2).

[0115] FIG. 8a is a cross-sectional view of the line II-II' shown in FIG. 5.

[0116] For example, FIG. 8a also shows a cross-sectional view of the stage (STG) shown in FIG. 1 and the pressure pad (PPD) shown in FIG. 6.

[0117] Referring to FIG. 8a, the cavities (CVT) may be provided in multiple numbers. The multiple cavities (CVT) may extend in a third direction (DR3) and be arranged in a first direction (DR1). When viewed in a planar view, the cavities (CVT) may overlap with the pad (PD). Through holes (AH) may extend from the cavities (CVT).

[0118] Multiple air injection holes (AIH) may be defined in the portion of the stage (STG) where the recess (RES) is defined. The air injection holes (AIH) may be arranged to correspond to each cavity (CVT). When viewed in a planar view, each air injection hole (AIH) may overlap with a corresponding cavity (CVT) among the cavities (CVT).

[0119] FIG. 8b is a drawing illustrating the shape of a cavity according to another embodiment of the present invention.

[0120] For example, FIG. 8b is illustrated as a cross-section corresponding to FIG. 8a.

[0121] Referring to FIG. 8b, unlike the cavities (CVT) shown in FIG. 8a, a single cavity (CVT) can be defined within the support (SUP). Unlike the structure shown in FIG. 8a, a larger single cavity (CVT) can be defined within the support (SUP). When viewed in a planar view, the single cavity (CVT) can overlap with the pad (PD). In this case, through holes (AH) can extend from the single cavity (CVT).

[0122] FIGS. 9A and FIGS. 9B are drawings illustrating a lamination device according to an embodiment of the present invention.

[0123] FIG. 9a is a plan view of a lamination device (1000) according to one embodiment. FIG. 9b is a drawing showing an enlarged view of the bending area (BA) of the lamination device (1000) of FIG. 9a.

[0124] Referring to FIG. 9a, the lamination device (1000) may include a support (SUF), a guide film (GFM), an adhesive layer (100), a display module (DM), and an adhesive film (ADF). The display layer (200) may include a display module (DM) and an adhesive film (ADF). A window may subsequently be attached to the display layer (200).

[0125] The support member (SUF) can support the display layer (200). The support member (SUF) may include a support portion, a diaphragm, and a pressure pad. Further details will be described later.

[0126] A guide film (GFM) can be placed between a support (SUF) and a display module (DM). An adhesive layer (100) can be placed between the guide film (GFM) and the display module (DM). The adhesive layer (100) can adhere the display module (DM) to the guide film (GFM). Thus, the guide film (GFM) can guide the display module (DM) when the display module (DM) and the window are bonded together.

[0127] A bending area (BA) and a non-bending area (FA) are defined in the display module (DM). The display module (DM) may include a bending portion of the bending area (BA) and a non-bending portion of the non-bending area (FA). The non-bending area (FA) may be adjacent to the bending area (BA) and may be provided in multiple numbers. The bending area (BA) of the display module (DM) may have a bent shape with curvature. The bending portion may be designated as a curvature portion or a folding portion.

[0128] The guide film (GFM) may include a curved portion (CVP) and a flat portion (FLP). The curved portion (CVP) may overlap the bending area (BA) of the display module (DM), and the flat portion (FLP) may overlap the non-bending area (FA) of the display module (DM). That is, the curved portion (CVP) may support the bending area (BA) of the display module (DM), and the flat portion (FLP) may support the non-bending area (FA) of the display module (DM).

[0129] The adhesive layer (100) may include a first portion (110) and a second portion (120). The first portion (110) may be positioned between the bending area (BA) of the display module (DM) and the curved portion (CVP) of the guide film (GFM), and the second portion (120) may be positioned between the non-bending area (FA) and the flat portion (FLP).

[0130] The first portion (110) of the adhesive layer (100) is a non-adhesive portion, and the second portion (120) may correspond to an adhesive portion. That is, the curved portion (CVP) of the guide film (GFM) is not adhered to the first portion (110) (non-adhesive). The flat portion (FLP) of the guide film (GFM) may be adhered to the second portion (120).

[0131] The guide film (GFM) may include various materials, including plastic having a certain modulus. In one embodiment, the modulus of the guide film (GFM) may be higher than the modulus of the display module (DM). A high modulus of the guide film (GFM) may cause high stress in the bending region (BA) of the display module (DM). A lamination device (1000) according to one embodiment of the present invention can relieve stress in the bending region (BA) of the display module (DM) by removing the adhesive force from the first portion (110) of the adhesive layer (100).

[0132] Referring to FIG. 9b, the display module (DM) may include a protective film (PF), a display panel (DP), and an anti-reflective film (POL). The protective film (PF) may be placed between the adhesive layer (100) and the display panel (DP). The protective film (PF) may be attached to the underside of the display panel (DP) to protect the display panel (DP) from external impact. A second portion (120) of the adhesive layer (100) is adhered to the protective film (PF), but a first portion (110) is not adhered to the protective film (PF).

[0133] An anti-reflective film (POL) may be placed between a display panel (DP) and an adhesive film (ADF). The anti-reflective film (POL) may reduce the reflectance of external light incident from above the display device (DD) toward the display panel (DP). For example, the anti-reflective film (POL) may include a phase retarder and / or a polarizer.

[0134] A neutral plane (NP) may be defined on the display panel (DP). In FIG. 9b, a neutral plane (NP) may be defined on the bending region (BA) of the display panel (DP) when viewed in cross-section. The neutral plane (NP) may correspond to a plane or part in the bending region (BA) where no compression or tension occurs. In one embodiment, the neutral plane (NP) may be positioned in the center of the display panel (DP) in cross-section. In this case, the part closer to the adhesive layer (100) relative to the neutral plane (NP) of the display panel (DP) may be compressed, and the part closer to the adhesive film (ADF) may be tensioned. In one embodiment of the present invention, by defining a neutral plane (NP) on the display panel (DP) in the bending region (BA) of the display module (DM), stress occurring in the display panel (DP) in the bending region (BA) of the display module (DM), which is in a bent state together with the guide film (GFM), may be relieved.

[0135] In one embodiment, the thickness (T1) of the adhesive film (ADF) may be thicker than the thickness (T2) of the anti-reflective film (POL). One embodiment of the present invention can reduce the tensile force applied to the display panel (DP) while maintaining a thicker thickness of the adhesive film (ADF). That is, in a lamination device according to one embodiment of the present invention, a neutral plane (NP) can be defined inside the display panel (DP) while maintaining the thickness of the adhesive film (ADF) so that it has sufficient adhesive strength.

[0136] FIGS. 10a and FIGS. 10e are drawings illustrating a lamination method according to an embodiment of the present invention.

[0137] In FIG. 10a, the adhesive film (ADF) can be adhered to the display module (DM). The adhesive film (ADF) may include an optically clear adhesive (OCA) as described above, but is not necessarily limited thereto.

[0138] In FIG. 10b and FIG. 10c, the adhesive film (ADF) can be attached to the anti-reflective film (POL). The anti-reflective film (POL) is placed on the display panel (DP).

[0139] A display layer (200) comprising a display module (DM) and an adhesive film (ADF) can be attached to a guide film (GFM) by a pre-adhesive layer (100-1). The pre-adhesive layer (100-1) can be applied over the entire space between the protective film (PF) of the display module (DM) and the guide film (GFM). The pre-adhesive layer (100-1) can bond the bending region (BA) and the non-bending region (FA) of the display module (DM) to the guide film (GFM).

[0140] A UV laser (UVL) from a UV radiation module (UVM) can be irradiated toward a pre-adhesive layer (100-1). A guide film (GFM) may contain a material through which UV light is transmitted. The UV laser (UVL) can be irradiated from below the guide film (GFM) through the guide film (GFM) to the pre-adhesive layer (100-1). Specifically, the UV laser (UVL) can be irradiated toward a portion of the pre-adhesive layer (100-1) that overlaps with a bending region (BA) of a display module (DM).

[0141] The ultraviolet laser (UVL) is not irradiated to other parts of the pre-adhesive layer (100-1) that overlap the non-bending area (FA) of the display module (DM) through the mask (MSK).

[0142] The adhesive layer (100-1) may include a UV-curing adhesive. Here, the UV-curing adhesive may include a material that normally has adhesive properties but loses its adhesive properties when irradiated with ultraviolet light. The UV-curing adhesive is not particularly limited.

[0143] In FIG. 10c and FIG. 10d, when a UV laser (UV) is irradiated onto the bending region (BA) of the pre-adhesive layer (100-1), the adhesive force of the irradiated portion is removed, and the adhesive layer (100) of the present invention, comprising a first portion (110) and a second portion (120), can be formed. The first portion (110) of the adhesive layer (100) overlaps the bending region (BA) and is in a state where the adhesive force is removed. The second portion (120) is in a state where the adhesive force is maintained. Accordingly, the curved portion, which is a part of the guide film (GFM) overlapping the bending region (BA), can be detached from the display module (DM) by the UV laser (UV).

[0144] In FIGS. 10a to 10e, the length of the guide film (GFM) may be longer than the length of the display layer (200) in the second direction (DR2). The display layer (200) may be attached to the guide film (GFM) by an adhesive layer (100). The display layer (200) includes a display panel (DP) and an adhesive film (ADF). The lamination process of the guide film (GFM) and the display panel (DP) may be performed in a first process chamber (not shown).

[0145] The guide film (GFM) and the display layer (200) bonded together can be transferred to a second process chamber (not shown). In the second process chamber, a bonding process for bonding a window (WIN) to a display panel (DP) can be performed. The processes described below can substantially be performed together in the second process chamber.

[0146] Referring to FIG. 10e, a plurality of jigs (JIGs) are provided, and the jigs (JIGs) can be positioned on a portion of a guide film (GFM) adjacent to both ends of the guide film (GFM) that are opposite each other in a second direction (DR2). The jigs (JIGs) can grasp both sides of the guide film (GFM) that are opposite each other in a first direction (DR1). The guide film (GFM) can be moved by the jigs (JIGs).

[0147] FIGS. 11 to 17 are drawings for explaining a method of manufacturing a display device using a lamination facility including a lamination device.

[0148] Referring to FIG. 11, a guide film (GFM), a display module attached to the guide film (GFM), and an adhesive film (hereinafter, a display layer (200)) can be placed on a support (SUF) by jigs (JIG). Specifically, the guide film (GFM) can be placed on a diaphragm (DPM) and a pressure pad (PPD). The jigs (JIG) can move downward to provide the guide film (GFM) and the display layer (200) attached to the guide film (GFM) onto the pressure pad (PPD). The pressure pad (PPD) can support a bending region (BA) of the display layer (200).

[0149] Referring to FIGS. 11 and 12, a guide film (GFM) is moved downward by jigs (JIG), and a portion of the guide film (GFM) that overlaps with the bending area (BA) of the display layer (200) can be placed on a pressure pad (PPD). The curved portion of the guide film (GFM) that overlaps with the bending area (BA) of the display layer (200) can come into contact with the pad (PD) of the pressure pad (PPD). The bending area (BA) of the display layer (200) that comes into contact with the pad (PD) can be bent along the curved surface of the upper surface of the pad (PD). At this time, since the first portion (110) of the adhesive layer (100) that attaches the bending area (BA) of the display layer (200) and the guide film (GFM) has no adhesive force, the stress on the display panel caused by the bending of the display layer (200) can be relieved and defects can be prevented.

[0150] The jigs (JIG) can move both ends of the guide film (GFM) downward and place them in the fixed grooves (FGV) defined in the tension portions (TNP). Afterward, the jigs (JIG) can be removed from the guide film (GFM).

[0151] Both ends of the guide film (GFM) can be fixed in the fixing grooves (FGV). Although not illustrated, fixing units for fixing both ends of the guide film (GFM) (e.g., screws for pressing the guide films) may be placed in the fixing grooves (FGV). The tensioning members (TNP) can be moved away from each other in the second direction (DR2) by the first moving members (MOV1) to flatten the guide film (GFM).

[0152] Referring to FIGS. 12 and 13, the rollers (ROL) can move in a third direction (DR3) and a second direction (DR2). As previously described, the rollers (ROL) can be moved in the third direction (DR3) by the second moving part (MOV2) and in the second direction (DR2) by the third moving part (MOV3).

[0153] The rollers (ROL) can move the guide film (GFM) by contacting it. The rollers (ROL) can contact parts of the guide film (GFM) adjacent to the display panel (DP, see FIG. 10d). The rollers (ROL) can be positioned adjacent to the bottom of the support (SUP). The rollers (ROL) can be positioned adjacent to opposite sides of the support (SUP) in the second direction (DR2). The rollers (ROL) can be adjacent to the bottom of the diaphragm (DPM). For example, the rollers (ROL) can be adjacent to the bottom of the cover (COV).

[0154] A guide film (GFM) is disposed on the sides of the diaphragm (DPM) and the pressure pad (PPD), and a display layer (200) can be disposed on the sides of the diaphragm (DPM) and the pressure pad (PPD) by the guide film (GFM). The sides of the diaphragm (DPM) can be defined as parts of the diaphragm (DPM) adjacent to the sides of the support (SUP) that are opposite each other in the second direction (DR2). The diaphragm (DPM) can support the non-bending region (FA) of the display layer (200).

[0155] The display layer (200) may be positioned spaced upward from the rollers (ROL). Substantially, the rollers (ROL) may guide the display layer (200) so that the display layer (200) is positioned adjacent to the support (SUP) and the diaphragm (DPM).

[0156] As the guide film (GFM) moves by the rollers (ROL), the tension members (TNP) can also move together with the rollers (ROL). As the rollers (ROL) move toward the support member (SUP), the tension members (TNP) can move toward the second direction (DR2) by the first moving members (MOV1).

[0157] From Fig. 14 onwards, the tension parts (TNP) are omitted.

[0158] Referring to FIG. 14, a window fixing chuck (FCK) may be placed on a diaphragm (DPM) and a pressure pad (PPD). The window fixing chuck (FCK) may be positioned to face the diaphragm (DPM) and the pressure pad (PPD). Substantially, the stage (STG) may move to a position where the window fixing chuck (FCK) is placed so that the window fixing chuck (FCK) is placed on the pressure pad (PPD).

[0159] A groove (GOV) defined in the window fixing chuck (FCK) may face the pressure pad (PPD). The groove (GOV) may be a window fixing groove. The inner end of the groove (GOV) facing the pressure pad (PPD) may have a concave shape. Specifically, at the inner end of the groove (GOV) facing the curved surface of the upper surface of the pad (PD), the window fixing chuck (FCK) may have a concave curved surface.

[0160] A window (WIN) may be placed in a groove (GOV) of a window fixing chuck (FCK). The window (WIN) placed in the groove (GOV) may have a bent shape. Although not illustrated, vacuum suction holes may be defined on the inner surface of the window fixing chuck (FCK) where the groove (GOV) is defined to suction and fix the window (WIN).

[0161] The display layer (200) includes a display module (DM, see FIG. 10d) and an adhesive film (ADF, see FIG. 10d).

[0162] The display layer (200) may have a bent shape because it is arranged along the upper surface of a pad (PD) having a convex curved surface and a support portion (SUP) having a plate shape extending in a third direction (DR3). The display layer (200) may include a bending portion (BP) having a bent shape and first flat portions (PP1) extending from the bending portion (BP) and having a flat shape.

[0163] A bending portion (BP) may be placed on a pad (PD) having a curved surface. First flat portions (PP1) may be placed on the sides of a diaphragm (DPM) adjacent to the sides of a support portion (SUP) by extending downward from the bending portion (BP) (or in a third direction (DR3)). Additionally, the first flat portions (PP1) may be placed on opposite sides of the pad (PD) in a second direction (DR2). When the display layer (200) is unfolded, the bending portion (BP) may be placed between the first flat portions (PP1).

[0164] The window (WIN) may include a folding portion (FP) corresponding to a bending portion (BP) and second flat portions (PP2) corresponding to first flat portions (PP1). The second flat portions (PP2) may extend downward from the folding portion (FP) (or in a third direction (DR3)).

[0165] When the window (WIN) is unfolded, the folding portion (FP) can be positioned between the second flat portions (PP2). By means of a lamination device (BOD), the bending portion (BP) can be attached to the folding portion (FP), and the first flat portions (PP1) can be attached to the second flat portions (PP2). This operation will be described in detail below.

[0166] Referring to FIGS. 14 and 15a, a support member (SUP), a diaphragm (DPM), and a pressure pad (PPD) can be placed in a groove (GOV) so that a display layer (200) can be placed in the groove (GOV). In order for the support member (SUP), the diaphragm (DPM), and the pressure pad (PPD) to be placed in the groove (GOV), a window fixing chuck (FCK) can be moved in a third direction (DR3).

[0167] However, not limited thereto, the stage (STG) may move in a third direction (DR3) so that the support member (SUP), diaphragm (DPM), and pressure pad (PPD) are placed in the groove (GOV). Alternatively, the window fixing chuck (FCK) and the stage (STG) may move together in a third direction (DR3) so that they come closer to each other.

[0168] When the window fixing chuck (FCK) moves in the third direction (DR3) and the diaphragm (DPM) and pressure pad (PPD) are inserted into the groove (GOV), the display module (DM, see FIG. 10d) may be positioned so as to be spaced apart from the window (WIN) so that the display module (DM) is not attached to the window (WIN) by the adhesive film (ADF). Accordingly, in the groove (GOV), the display module (DM) may be positioned so as to be spaced apart from the window (WIN) by a predetermined distance. For example, the distance between the display module (DM) and the window (WIN) may be 0.3 mm to 0.7 mm.

[0169] Fig. 15b is an enlarged view of the pressure pad shown in Fig. 15a.

[0170] Referring to FIG. 15b, the window (WIN) placed on the window fixing chuck (FCK) does not come into contact with the display layer (200). Since the window fixing chuck (FCK) does not press the pressure pad (PPD), the pressure pad (PPD) can maintain its original shape. In this case, the first support bar (SB1) and the second support bar (SB2) can be spaced apart by a first gap (GP1) in the third direction (DR3). With respect to the third direction (DR3), the pad (PD) can have a first thickness (TH1). With respect to the second direction (DR2), the pad (PD) can have a first width (WM1).

[0171] Referring to FIG. 16a, the window fixing chuck (FCK) can move further downward to press the pressure pad (PPD). When the window fixing chuck (FCK) presses the pressure pad (PPD), the pressure pad (PPD) may be deformed. Specifically, when the window fixing chuck (FCK) presses the pad (PD), the pad (PD) may be deformed by the pressure exerted by the window fixing chuck (FCK).

[0172] Due to pressure from the window fixing chuck (FCK), the pad (PD) can be contracted in the third direction (DR3) and expanded in the second direction (DR2). The pad (PD) can be deformed into a shape corresponding to the concave curved surface of the window fixing chuck (FCK) that defines the groove (GOV). Since the pad (PD) contracts in the third direction (DR3), the gap between the first support bar (SB1) and the second support bar (SB2) can be reduced.

[0173] A bending portion (BP) of a display layer (200) placed on a pressure pad (PPD) can be attached to a folding portion (FP) of a window (WIN) adjacent to the bending portion (BP). Specifically, when a window fixing chuck (FCK) presses the pad (PD), the shape of the pad (PD) is deformed, and the bending portion (BP) can be attached to the folding portion (FP) by the pressure of the pad (PD).

[0174] In practice, the bending portion (BP) can be attached to the folding portion (FP) by means of an adhesive film (ADF) placed on the display layer (200).

[0175] Parts of the first flat sections (PP1) adjacent to the bending section (BP) can move toward parts of the adjacent second flat sections (PP2) according to the pressure of the pad (PD) expanding in the second direction (DR2). Accordingly, depending on the deformation of the pad (PD), parts of the first flat sections (PP1) adjacent to the bending section (BP) can also be attached to parts of the second flat sections (PP2) adjacent to the folding section (FP).

[0176] Fig. 16b is an enlarged view of the pressure pad shown in Fig. 16a.

[0177] Referring to FIG. 16b, the window fixing chuck (FCK) presses the pressure pad (PPD), causing the pressure pad (PPD) to deform and the window (WIN) to come into contact with the display layer (200). In this case, the first support bar (SB1) and the second support bar (SB2) may be spaced apart by a second gap (GP2). The second gap (GP2) may be smaller than the first gap (GP1). That is, the first support bar (SB1) and the second support bar (SB2) may be positioned closer to each other than in FIG. 15b.

[0178] In FIG. 6, when the first support bar (SB1) and the second support bar (SB2) are fixed to the second columns (COL2), and the window fixing chuck (FCK) presses the pressure pad (PPD), the first support bar (SB1) and the second support bar (SB2) placed within the pad (PD) can be bent downward.

[0179] Based on the third direction (DR3), the pad (PD) can have a second thickness (TH2) that is smaller than the first thickness (TH1). That is, the pad (PD) can contract in the third direction (DR3). Based on the second direction (DR2), the pad (PD) can have a second width (WM2) that is larger than the first width (WM1). That is, the pad (PD) can expand in the second direction (DR2).

[0180] Depending on the deformation of the pad (PD), the part of the diaphragm (DPM) between the pad (PD) and the support (SUP) may bend.

[0181] Referring to FIG. 17, air is injected into the air injection hole (AIH), and the air can be supplied to the cavity (CVT) through the air injection hole (AIH). The air supplied to the cavity (CVT) can be supplied to the through holes (AH) through the cavity (CVT). The cavity (CVT) and the through holes (AH) can substantially define an air path through which the air travels. The air can be supplied to the diaphragm (DPM) through the through holes (AH).

[0182] For example, air (AIR) may be supplied to the cavity (CVT) and through holes (AH) through the air injection hole (AIH), but embodiments of the present invention are not limited thereto. For example, various gases or fluids including air may be supplied to the cavity (CVT) and through holes (AH) through the air injection hole (AIH).

[0183] The diaphragm (DPM) can be expanded toward the outside of the support (SUP) by air (AIR) provided through the through hole (AH). The expanded diaphragm (DPM) can push the first flat sections (PP1) of the display layer (200) adjacent to the sides of the diaphragm (DPM) toward the outside of the support (SUP). As a result, the first flat sections (PP1) can move toward the second flat sections (PP2) adjacent to the first flat sections (PP1) and be attached to the second flat sections (PP2).

[0184] In practice, the first flat portions (PP1) can be attached to the second flat portions (PP2) by means of an adhesive film (ADF) disposed on the display layer (200).

[0185] Although not shown, after the display layer (200) is attached to the window (WIN), the guide film (GFM) can be separated from the display layer (200).

[0186] When the bent display layer (200) is inserted into and attached to the bent window (WIN) without using the lamination equipment (BOD) of the present invention, the first flat portions (PP1) may be attached to the second flat portions (PP2) first. In this case, a bonding defect may occur in which the bending portion (BP) is not attached to the folding portion (FP).

[0187] However, in an embodiment of the present invention, since the display layer (200) is attached to the window (WIN) sequentially from the bending portion (BP) to the first flat portions (PP1) by a lamination facility (BOD), the display layer (200) can be attached to the window (WIN) more easily. Therefore, a defect in bonding between the display layer (200) and the window (WIN) can be prevented.

[0188] According to the structure of the pressure pad (PPD), support member (SUP), and window fixing chuck (FCK), a flat display layer (200) and a flat window (WIN) are bent 180 degrees, and a bonding process for a bending member (BP) and a folding member (FP) having a semicircular shape is described. The 180-degree bent state, using the flat display layer (200) as an example, represents a structure in which one of the first flat members (PP1) is moved 180 degrees around the bending member (BP) to face another first flat member (PP1) and extends in a third direction (DR3).

[0189] However, embodiments of the present invention are not limited thereto, and the lamination equipment (BOD) of the present invention may be used to laminate a display module (DM, see FIG. 10d) and a window (WIN) having various curved surfaces. For example, by changing the shape of the groove (GOV) defined in the window fixing chuck (FCK) and the shapes of the pressure pad (PPD) and the support part (SUP), the display module (DM) and the window (WIN) may be bent to have an angle less than 180 degrees and greater than 90 degrees and laminated together. That is, the bending part (BP) and the folding part (FP) may be formed to have various curved shapes.

[0190] FIG. 18 is a drawing illustrating a panel support for being combined with a display layer and a window. FIG. 19 is a drawing illustrating a display device manufactured by a display panel, a window, and a panel support combined with each other.

[0191] Referring to FIG. 18, a display layer (200) and a window (WIN) that have a bent structure and are bonded together can be bonded to a panel support (P_SP). The panel support (P_SP) can be placed between the first flat portions (PP1) of the display layer (200). The panel support (P_SP) may include a bracket that supports the display layer (200), a battery that supplies power to the display layer (200), and a system board that controls the operation of the display layer (200).

[0192] Referring to FIGS. 18 and 19, the bending portion (BP) of the display layer (200) can define the side display portion (SSD) of the display device (DD). The first flat portions (PP1) of the display layer (200) can define the front display portion (USD) of the display device (DD) and the rear display portion (LSD) of the display device (DD).

[0193] The front display (USD), rear display (LSD), and side display (SSD) can display specific images. For example, the front display (USD) can display specific icons, and the side display (SSD) can display the date and weather. However, this is illustrated as an example, and the front display (USD) and side display (SSD) can display various images. Although not illustrated due to the viewing position in the perspective view, the rear display (LSD) can also display various images.

[0194] FIGS. 20a to 20c are drawings showing the step of removing a guide film according to one embodiment of the present invention.

[0195] After the lamination step of bonding the display module (DM) and the window (WIN) through an adhesive film (ADF), a step of removing the guide film (GFM) is required. The step of removing the guide film (GFM) from the display module (DM) may include removing the guide film (GFM) from the bending area (BA) and removing it from the non-bending area (FA) of the display module (DM).

[0196] In this embodiment, the step of removing the guide film (GFM) may include a first step of removing the guide film (GFM) from the bending area (BA) of the display module (DM) and a second step of removing the guide film (GFM) from the non-bending area (FA) of the display module (DM) after the first step.

[0197] In FIG. 20a, the step of removing the guide film (GFM) may include the step of removing the second portion (120) of the adhesive layer (100). The step of removing the guide film (GFM) may include the step of removing the adhesive force of the second portion (120) of the adhesive layer (100). For example, the step of removing the guide film (GFM) may include the step of irradiating a UV laser (UVL) onto the second portion (120). The second portion (120) of the adhesive layer (100) may include a UV-curing adhesive, similar to the first portion (110). When a UV laser (UVL) is irradiated from a UV radiation module (UVM) toward the second portion (120), the adhesive force of the second portion (120) may be removed. The guide film (GFM) may be detached from the second portion (120).

[0198] In FIG. 20b and FIG. 20c, the step of removing the guide film (GFM) may include the step of inserting a rod tube (RT) in a first direction (DR1) between the bending area (BA) of the display module (DM) and the curved portion (CVP) of the guide film (GFM). The step of inserting the rod tube (RT) may be the first step of removing the guide film (GFM) from the bending area (BA) of the display module (DM).

[0199] The rod tube (RT) may include a space for injecting air into it. When air is injected into it, the rod tube (RT) can be expanded. When the rod tube (RT) is inserted between the bending area (BA) and the curved portion (CVP) in the first direction (DR1), it can be expanded by injecting air. Subsequently, the step of removing the guide film (GFM) may include the step of moving the expanded rod tube (RT) in the third direction (DR3). As the expanded rod tube (RT) moves in the third direction (DR3) away from the bending area (DA), the guide film (GFM) can be removed from the display module (DM). The step of moving the rod tube (RT) in the third direction (DR3) may be a second step of removing the guide film (GFM) from the non-bending areas (FA) of the display module (DM).

[0200] As described above, an embodiment has been disclosed in the drawings and specification. Specific terms have been used herein, but they are used only for the purpose of describing the invention and are not intended to limit the meaning or the scope of the invention as described in the claims. Therefore, those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible therefrom. Accordingly, the true technical scope of protection of the invention should be determined by the technical spirit of the appended claims. Explanation of the symbols

[0201] BOD: Lamination facility DD: Display device 1000: Lamination device SUF: Support DM: Display Module GFM: Guide Film 100: Adhesive layer 110: Part 1 120: Part 2 BA: Bending area FA: Non-bending area

Claims

Claim 1 A display module having defined bending and non-bending regions; a guide film disposed on one surface of the display module; and an adhesive layer disposed between the display module and the guide film, wherein the adhesive layer comprises a UV-curing adhesive and includes a first portion overlapping the bending region of the display module and a second portion overlapping the non-bending region, wherein the adhesive force of the first portion is removed when irradiated with ultraviolet light, and the first portion A lamination device that is not adhered to the guide film and has a second part adhered to the guide film. Claim 2 In claim 1, the lamination device comprises a display module including a protective film disposed on the guide film, a display panel disposed on the protective film, and an anti-reflective film disposed on the display panel. Claim 3 In paragraph 2, the adhesive layer is disposed between the protective film and the guide film, and the lamination device is adhered to the lower surface of the protective film. Claim 4 A lamination device according to paragraph 2, characterized in that a neutral plane is defined on the bending region of the display module, and the neutral plane is defined on the display panel in cross-section. Claim 5 delete Claim 6 In claim 1, the guide film is a lamination device comprising a material that transmits ultraviolet rays. Claim 7 A lamination device according to paragraph 2, further comprising an adhesive film disposed on the display module, wherein the thickness of the adhesive film is greater than the thickness of the anti-reflective film. Claim 8 A lamination device according to claim 1, further comprising a support member supporting the display module, wherein the support member comprises: a support portion having a plurality of through holes defined therein; a diaphragm disposed on the support portion and covering the support portion; and a pressure pad disposed on the diaphragm on the upper surface of the support portion, wherein the pressure pad comprises: a pad portion; and at least one support bar disposed within the pad portion and extending in a first direction. Claim 9 A lamination device according to claim 8, wherein the pressure pad supports the bending area of ​​the display module and the diaphragm supports the non-bending area of ​​the display module. Claim 10 A lamination device according to claim 8, further comprising a window fixing chuck to which a window is fixed, wherein the window fixing chuck has a window fixing groove facing the pressure pad, and the display module is disposed between the pressure pad and the window fixing groove. Claim 11 A lamination method comprising: providing a display module including a display panel that displays an image, wherein a bending area and a non-bending area adjacent to the bending area are defined; placing an adhesive layer on the lower surface of the display module, the adhesive layer including a first portion overlapping the bending area and a second portion overlapping the non-bending area; placing a guide film on the lower surface of the adhesive layer; and removing the first portion of the adhesive layer, wherein the step of removing the first portion of the adhesive layer includes removing the adhesive force of the first portion, the adhesive layer includes a UV-curing adhesive, and the step of removing the adhesive force of the first portion of the adhesive layer further includes irradiating the first portion with ultraviolet light. Claim 12 delete Claim 13 delete Claim 14 In claim 11, the guide film comprises a curved portion that is bonded to the first portion of the adhesive layer and a flat portion that is bonded to the second portion, and the step of removing the adhesive force of the first portion comprises the step of detaching the first portion of the adhesive layer and the curved portion of the guide film from each other. Claim 15 A lamination method according to claim 11, wherein the step of providing the display module comprises: the step of providing the display panel; and the step of attaching an adhesive film on the upper surface of the display panel. Claim 16 A lamination method according to claim 11, further comprising the step of providing a support including a pressure pad supporting the bending area of ​​the display module and a support member supporting the non-bending area. Claim 17 A lamination method according to claim 16, characterized in that the guide film is positioned between the support and the display module to seat the display module on the support. Claim 18 A lamination method according to claim 15, further comprising the steps of: placing a window on the adhesive film in which a folding region overlapping with the bending region of the display module and a non-folding region overlapping with the non-bending region are defined; and removing the guide film from the display module. Claim 19 A lamination method according to claim 18, wherein the step of removing the guide film from the display module comprises: a first step of detaching the guide film from the bending area of ​​the display module; and a second step of detaching the guide film from the non-bending area of ​​the display module. Claim 20 In claim 18, the step of removing the guide film further comprises the step of removing the adhesive force of the second portion of the adhesive layer. Claim 21 A lamination method according to claim 20, wherein the step of removing the guide film further comprises: inserting a rod tube in a first direction between the bending area of ​​the display module and the guide film; expanding the rod tube; and moving the expanded rod tube in a direction perpendicular to the first direction and away from the bending area. Claim 22 In claim 20, the step of removing the adhesive force of the second part comprises a lamination method including the step of irradiating the second part with ultraviolet light. Claim 23 A step of preparing a display panel comprising a bending portion and a non-bending portion adjacent to the bending portion, wherein an adhesive film is attached to the upper surface and a guide film is attached to the lower surface; a step of detaching the guide film from the bending portion; a step of preparing a diaphragm disposed on a support portion and covering the support portion, and a step of preparing a pressure pad disposed on the diaphragm on the upper surface of the support portion; a step of placing the display panel on the sides of the diaphragm adjacent to the sides of the support portion and on the pressure pad; a step of placing a window in a groove of a window fixing chuck on the pressure pad; a step of placing the diaphragm and the pressure pad in the groove; a step of moving the window fixing chuck downward to press the pressure pad, thereby attaching the bending portion of the display panel disposed on the pressure pad to the folding portion of the window adjacent to the bending portion. A method for manufacturing a display device comprising the step of expanding the diaphragm to attach non-bending portions of the display panel, which extend downward from the bending portion and are adjacent to the sides of the diaphragm, to non-bending portions of the window adjacent to the non-bending portions, wherein an adhesive layer is disposed between the guide film and the display panel, and the adhesive layer comprises a UV-curing adhesive, a first portion overlapping the bending portion of the display panel and a second portion overlapping the non-bending portion, and the step of detaching the guide film from the bending portion further comprises the step of irradiating the first portion with ultraviolet light to remove the adhesive force of the first portion.

Images