KR20220094287A - Lamination device, lamination method, and manufacturing method of display device including same - Google Patents

Abstract

A lamination device according to one embodiment of the present invention includes a support; a display module disposed on the support and defining a bending area and a non-bending area; 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 includes a first part overlapping the bending area of the display module and a second part overlapping the non-bending area, the first part does not adhere to the guide film, and the second part adheres to the guide film. According to the present invention, cracks caused by the curvature of a bending part of a display panel can be prevented.

Description

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

The present invention relates to a lamination device, a lamination method, and a method of manufacturing a display device including the same, and more particularly, to a lamination device capable of preventing defects in a display panel, a lamination method, and a method of manufacturing a display device including the same will be.

Electronic devices such as smart phones, digital cameras, notebook computers, navigation systems, and smart televisions that provide images to users include display devices for displaying images. The display device generates an image and provides it to a user through a display screen.

Recently, various types of display devices have been developed along with the development of display device technologies. For example, a display device capable of displaying an image not only on the front side of the display device, but also on the rear surface of the display device and the side surface of the display device is being developed.

The display device includes a display panel that displays an image and a window disposed on the display panel to protect the display panel. In order to display an image on the front, rear, and side surfaces of the display device, the display panel and the window may be formed to be disposed along the front, rear, and side surfaces of the display device.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a lamination device capable of preventing cracking due to the curvature of a bending portion of a display panel, a lamination method, and a method of manufacturing a display device including the same.

In embodiments, the lamination apparatus includes a display module having a bending region and a non-bending region defined therein, a guide film disposed on one surface of the display module, and an adhesive layer disposed between the display module and the guide film, and the adhesive layer includes a first portion overlapping the bending region of the display module and a second portion overlapping the non-bending region of the display module, wherein the first portion is non-adhesive to the guide film and the second portion is formed from the guide film can be glued.

The display module may include a protective film disposed on the guide film, a display panel disposed on the protective film, and an anti-reflection film disposed on the display panel.

The adhesive layer may be disposed between the protective film and the guide film, and may be adhered to a lower surface of the protective film.

A neutral plane may be defined on the bending area of the display module, and the neutral plane may be defined on the display panel in a cross-section.

The adhesive layer may include an ultraviolet curable adhesive.

The guide film may include a material that transmits ultraviolet rays.

The display module may further include an adhesive film disposed on the display module, wherein a thickness of the adhesive film may be greater than a thickness of the anti-reflection film.

It further includes a support for supporting the display module, wherein the support includes a support in which a plurality of through holes are defined, a diaphragm disposed on the support to cover the support, and a pressure pad disposed on the diaphragm on an upper surface of the support. The pressure pad may include a pad unit and at least one support bar disposed in the pad unit and extending in the first direction.

The pressure pad may support the bending area of the display module, and the diaphragm may support the non-bending area of the display module.

The window fixing chuck may further include a window fixing chuck to which a window is fixed, a window fixing groove facing the pressure pad is defined in the window fixing chuck, and the display module may be disposed between the pressing pad and the window fixing groove.

In some embodiments, the lamination method includes: providing a display module including a display panel in which a bending region and a non-bending region adjacent to the bending region are defined and displaying an image; disposing an adhesive layer including an overlapping first portion and a second portion overlapping the non-bending region, disposing a guide film on a lower surface of the adhesive layer, and removing the first portion of the adhesive layer may include

The removing of the first portion of the adhesive layer may include removing the adhesive force of the first portion.

The adhesive layer may include a UV curable adhesive, and the step of removing the adhesive force of the first part of the adhesive layer may further include irradiating UV rays to the first part.

The guide film includes a curved portion bonded to the first portion of the adhesive layer and a flat portion bonded to the second portion, and removing the adhesive force of the first portion includes the first portion of the adhesive layer and the guide It may include detaching the curved portions of the film from each other.

The providing of the display module may include providing the display panel and attaching an adhesive film on an upper surface of the display panel.

The method may further include providing a support including a pressure pad supporting the bending area of the display module and a support unit supporting the non-bending area of the display module.

The guide film may be disposed between the support and the display module to seat the display module on the support.

disposing on the adhesive film a window in which a folding area overlapping the bending area and a non-folding area overlapping the non-bending area of the display module is defined on the adhesive film; and removing the guide film from the display module. may include

The step of removing the guide film from the display module includes 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. can do.

The removing of the guide film may further include removing an adhesive force of the second portion of the adhesive layer.

The step of removing the guide film may include inserting a bar tube between the bending area of the display module and the guide film in a first direction, expanding the bar tube, and inserting the expanded bar tube into the first direction. The method may further include moving in a direction perpendicular to the direction and away from the bending area.

The adhesive layer may include a UV curable adhesive, and removing the adhesive force of the second part may include irradiating UV rays to the second part.

Among the embodiments, a method of manufacturing a display device includes preparing a display panel including a bending portion and a non-bending portion adjacent to the bending portion, the display panel having an adhesive film attached to an upper surface and a guide film attached to a lower surface thereof; Detaching the guide film, preparing a diaphragm disposed on a support part to cover the support part and a pressure pad disposed on the diaphragm on an upper surface of the support part, side surfaces of the diaphragm adjacent to the side surfaces of the support part and the disposing the display panel on a pressure pad, disposing a window in a groove of a window fixing chuck on the pressure pad, disposing the diaphragm and the pressure pad in the groove, moving the window fixing chuck downward pressing the pressure pad to attach the bending part of the display panel disposed on the pressure pad to the folding part of the window adjacent to the bending part, and expanding the diaphragm in a downward direction from the bending part The method may include attaching non-bending parts of the display panel extending and adjacent to the side surfaces of the diaphragm to non-folding parts of the window adjacent to the non-bending parts.

In the lamination apparatus, the lamination method, and the method of manufacturing a display device including the same according to an embodiment of the present invention, the adhesive layer is removed between the bending portion of the display panel and the guide film to increase the tensile strength of the bending portion of the display panel according to the modulus of the guide film. can be reduced Accordingly, it is possible to reduce the occurrence of defects in the display panel.

1 is a perspective view of a lamination facility according to an embodiment of the present invention.
FIG. 2 is a view illustrating a display panel and a window that are bonded to each other through the lamination facility shown in FIG. 1 .
FIG. 3 is a diagram exemplarily illustrating a cross-section of the display panel shown in FIG. 2 .
FIG. 4 is a diagram exemplarily illustrating a cross-section of one pixel disposed in the circuit element layer and the display element layer illustrated in FIG. 3 .
5 is a perspective view of the diaphragm shown in FIG. 1 and a support portion disposed inside the diaphragm;
6 is an enlarged perspective view of the pressure pad shown in FIG. 1 .
7 is a cross-sectional view taken along line I-I' shown in FIG. 5 .
8A is a cross-sectional view taken along line II-II' shown in FIG. 5 .
8B is a diagram illustrating a shape of a cavity according to another embodiment of the present invention.
9A and 9B are diagrams illustrating a lamination apparatus according to an embodiment of the present invention.
10A and 10E are diagrams illustrating a lamination method according to an embodiment of the present invention.
11 to 17 are views for explaining a method of manufacturing a display device using a lamination facility including a lamination device.
18 is a view illustrating a panel support to be coupled to a display panel and a window;
19 is a view illustrating a display device manufactured by a display panel, a window, and a panel support unit coupled to each other.
20A to 20C are views illustrating a step of removing a guide film according to an embodiment of the present invention.

In the present specification, when a component (or region, layer, part, etc.) is referred to as being “on,” “connected to,” or “coupled with” another component, it is directly disposed/on the other component. It means that it can be connected/coupled or a third component can be placed between them.

Like reference numerals refer to like elements. In addition, in the drawings, thicknesses, ratios, and dimensions of components are exaggerated for effective description of technical content. “and/or” includes any combination of one or more that the associated elements may define.

Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. The singular expression includes the plural expression unless the context clearly dictates otherwise.

In addition, terms such as “below”, “bottom”, “above”, and “upper side” are used to describe the relationship between the components shown in the drawings. The above terms are relative concepts, and are described based on directions indicated in the drawings.

Terms such as “comprise” or “have” are intended to designate that a feature, number, step, action, component, part, or combination thereof described in the specification is present, and includes one or more other features, number, or step. , it should be understood that it does not preclude the possibility of the existence or addition of an operation, a component, a part, or a combination thereof.

Unless defined otherwise, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Also, terms such as terms defined in commonly used dictionaries should be construed as having a meaning consistent with their meaning in the context of the relevant art, and unless they are interpreted in an ideal or overly formal sense, they are explicitly defined herein do.

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

1 is a perspective view of a lamination facility according to an embodiment of the present invention.

Referring to FIG. 1 , a lamination facility BOD according to an embodiment of the present invention includes a stage STG, a diaphragm DPM, a pressure pad PPD, a plurality of columns COL1 and COL2, and a plurality of tension units. (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 It may include a window fixing chuck (FCK).

The stage STG may have a plane defined by a first direction DR1 and a second direction DR2 intersecting the first direction DR1 . The pillars COL1 and COL2 may be disposed on the stage STG and extend in the third direction DR3 .

The third direction DR3 may be defined as a direction substantially perpendicular to a plane defined by the first direction DR1 and the second direction DR2 . Hereinafter, in the present specification, up, up, down, upper direction, and lower direction may refer to relative positions and directions of components with respect to the third direction DR3 . Also, the meaning of “viewed on a plane” may indicate a state viewed in the third direction DR3 .

The pillars COL1 and COL2 may include a plurality of first pillars COL1 and a plurality of second pillars COL2 . The first pillars COL1 may be disposed between the second pillars COL2 . The first pillars COL1 may be arranged in the first direction DR1 to face each other in the first direction DR1 .

The second pillars COL2 may be disposed on opposite sides of the stage STG opposite to each other in the first direction DR1 . The second pillars COL2 may be arranged in the first direction DR1 to face each other in the first direction DR1 . Lengths of the second pillars COL2 in the third direction DR3 may be longer than lengths of the first pillars COL1 .

The diaphragm DPM may be disposed on the stage STG. Although not shown, a support part may be disposed in the diaphragm DPM, and the configuration of the support part will be described with reference to 5 below. The diaphragm DPM may be disposed between the first pillars COL1 .

The pressure pad PPD may be disposed on the diaphragm DPM. The pressure pad PPD may extend in the first direction DR1 , be disposed on the first pillars COL1 , and may be connected to the second pillars COL2 .

The tension parts TNP may be disposed to face opposite sides of the stage STG opposite to each other in the second direction DR2 . The tension parts TNP may extend in the first direction DR1 .

The first moving parts MOV1 may be disposed between opposite sides of the stage STG opposite to each other in the second direction DR2 and the tension parts TNP. The first moving parts MOV1 may be inserted into the depressions RES1 defined at opposite sides of the stage STG opposite to each other in the second direction DR2 to 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 .

Although not shown, driving units for driving the first moving parts MOV1 may be disposed in the stage STG, but the positions of the driving units are not limited thereto.

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 pillars COL2 . The second moving part MOV2 may be connected to outer side surfaces of the second pillars COL2 opposite to inner side surfaces of the second pillars COL2 facing each other. The second moving part MOV2 may move in the third direction DR3 .

Although not shown, driving units for driving the second moving part MOV2 may be disposed in the second pillars COL2 , but the positions of the driving units are not limited thereto.

The third moving parts MOV3 may be disposed 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 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 inner surfaces of the second moving part MOV2 facing each other in the first direction DR1 , respectively. The third moving parts MOV3 may move in the second direction DR2 .

Although not shown, driving units for driving the third moving parts MOV3 may be disposed in the second moving part MOV2 , but the positions of the driving units are not limited thereto.

The roller supporters RSP may extend in the second direction DR2 . The roller support parts RSP may be connected to the third moving parts MOV3 . The roller supporters RSP connected to each of the third moving parts MOV3 may be disposed in the first direction DR1 .

Each of the rollers ROL may be disposed between the roller supporters RSP connected to each of the third moving parts MOV3 to be connected to the roller supporters RSP. The rollers ROL may have a cylindrical shape extending in the first direction DR1 . The rollers ROL may face each other in the 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 .

The rollers ROL may be connected to the roller support parts RSP to rotate. For example, the rollers ROL may rotate about a rotation axis parallel to the first direction DR1 . The rollers ROL may move in the second direction DR2 along the roller supporters RSP.

The window fixing chuck FCK may be disposed above the pressure pad PPD. A groove GOV extending in the first direction DR1 may be defined in the window fixing chuck FCK. An end inside the groove GOV may have a concave shape.

FIG. 2 is a diagram schematically illustrating a display panel and a window that are bonded to each other through the lamination facility shown in FIG. 1 .

For example, the display panel DP and the window WIN illustrated in FIG. 2 are illustrated as viewed from the side in the first direction DR1 .

Referring to FIG. 2 , in the lamination facility BOD, the display panel DP for bonding to the window WIN is disposed on the pressure pad PPD and the diaphragm DPM, and the window WIN is the window fixing chuck. It may be disposed in the groove (GOV) of (FCK). The shape of the display panel DP disposed on the pressure pad PPD and the diaphragm DPM and the shape of the window WIN disposed in the groove GOV of the window fixing chuck FCK will be illustrated in FIG. 14 below. .

The display panel DP may not be directly disposed on the pressure pad PPD and the diaphragm DPM, but may be disposed on the pressure pad PPD and the diaphragm DPM through the guide film GFM. For example, the guide film GFM may be prepared, and the display panel DP may be disposed on the guide film GFM. The guide film GFM may be disposed on the pressure pad PPD and the diaphragm DPM.

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).

The display panel DP may be a flexible display panel. The display panel DP according to an exemplary embodiment may be a light emitting display panel, and 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 emission layer of the organic light emitting display panel may include an organic light emitting material. The emission layer of the quantum dot light emitting display panel may include quantum dots and quantum rods. Hereinafter, the display panel DP will be described as an organic light emitting display panel.

The window WIN may be disposed on the 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 may have strong durability that is not easily broken even when bent.

The window (WIN) may include a synthetic resin film in addition to glass. Also, the window WIN may have a multi-layer structure or a single-layer structure. For example, the window WIN may include a plurality of synthetic resin films bonded with an adhesive, or a glass substrate and a synthetic resin film bonded with an adhesive.

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

The adhesive film ADF may be first disposed on the upper surface of the display panel DP. After the adhesive film ADF is first attached to the upper surface of the display panel DP, the window WIN may be attached to the adhesive film ADF. That is, the display panel DP and the window WIN may be bonded to each other by the adhesive film ADF. The lamination equipment BOD shown in FIG. 1 may be used to bond the display panel DP and the window WIN to each other.

After the display panel DP and the window WIN are bonded to each other, the guide film GFM may be separated from the display panel DP. Although not shown, an adhesive layer for attaching the guide film GFM to the display panel DP may be disposed between the guide film GFM and the display panel DP. The window WIN bonded to the display panel DP may protect the display panel DP from external scratches and impacts.

Although not shown, an input sensing unit for sensing an 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.

FIG. 3 is a diagram exemplarily illustrating a cross-section of the display panel shown in FIG. 2 . FIG. 4 is a diagram exemplarily illustrating a cross-section of any one pixel disposed in the circuit element layer and the display element layer illustrated in FIG. 3 .

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

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). The display device layer DP-OLED may be disposed on the display area DA.

A plurality of pixels may be disposed in the circuit element layer DP-CL and the display element layer DP-OLED. Each of the pixels may include a transistor disposed on the circuit device layer DP-CL and a light emitting device disposed on the display device layer DP-OLED and connected to the transistor.

The thin film encapsulation layer TFE may be disposed on the circuit element layer DP-CL to cover the 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 may protect the pixels from foreign substances such as dust particles.

Referring to FIG. 4 , the pixel PX may include a transistor TR and a light emitting device OLED. The light emitting device OLED may include a first electrode AE, a second electrode CE, a hole control layer HCL, an electron control layer ECL, and an emission layer EML. The first electrode AE may be an anode electrode, and the second electrode CE may be a cathode electrode.

The transistor TR and the light emitting device OLED may be disposed on the substrate SUB. Although one transistor TR is illustrated as an example, the pixel PX may include a plurality of transistors and at least one capacitor for driving the light emitting device OLED. The display area DA may include a light emitting area PA in which the light emitting device OLED is disposed and a non-emission area NPA around the light emitting area PA.

A buffer layer BFL is disposed on the 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, the present invention is not limited thereto, and the semiconductor pattern may include amorphous silicon or metal oxide.

The semiconductor pattern may be doped with an N-type dopant or a P-type dopant. The semiconductor pattern may include a highly doped region and a low doped region. The conductivity of the highly doped region is greater than that of the low doped region, and may substantially serve as a source and a drain of the transistor TR. The low doped region may substantially correspond to the active (or channel) of the transistor.

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

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 connection electrode CNE for connecting the transistor TR and the light emitting device OLED may be disposed between the transistor TR and the light emitting device OLED. The connection electrode CNE may include a first connection electrode CNE1 and a second connection electrode CNE2 disposed on the first connection electrode CNE1.

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

A sixth insulating layer INS6 may be disposed on the second connection electrode CNE2 . A layer from the buffer layer BFL to the sixth insulating layer INS6 may be defined as a circuit element layer DP-CL. The first insulating layer INS1 to the sixth insulating layer INS6 may be an inorganic layer or an organic layer.

The first electrode AE may be disposed on the sixth insulating layer INS6 . The first electrode AE may be connected to the second connection electrode CNE2 through the third contact hole CH3 defined in the sixth insulating layer INS6 . A pixel defining layer PDL exposing 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 layer PDL.

The hole control layer HCL may be disposed on the first electrode AE and the pixel defining layer PDL. The hole control layer HCL may be commonly disposed in the light emitting area PA and the non-emission area NPA. The hole control layer HCL may include a hole transport layer and a hole injection layer.

The emission layer EML may be disposed on the hole control layer HCL. The emission layer EML may be disposed in a region corresponding to the opening PX_OP. The emission layer EML may include an organic material and/or an inorganic material. The emission layer EML may generate any one of red, green, and blue light.

The electron control layer ECL may be disposed on the emission layer EML and the hole control layer HCL. The electronic control layer ECL may be commonly disposed in the light emitting area PA and the non-emission area NPA. The electron control layer (ECL) may include an electron transport layer and an electron injection layer.

The second electrode CE may be disposed on the electronic control layer ECL. The second electrode CE may be disposed in common with the pixels. The thin film encapsulation layer TFE may be disposed on the light emitting device OLED. A layer on which the light emitting device OLED is disposed may be defined as a display device layer DP-OLED.

A first voltage may be applied to the first electrode AE through the transistor TR, and a second voltage having a lower level than the first voltage may be applied to the second electrode CE. Holes and electrons injected into the light emitting layer EML combine to form an exciton, and as the exciton transitions to a ground state, the light emitting device OLED may emit light.

5 is a perspective view of the stage shown in FIG. 1 , the diaphragm, and a support portion disposed inside the diaphragm;

Referring to FIG. 5 , a depression RES may be defined on the upper surface of the stage STG. A plurality of air injection holes AIH may be defined in the depression RES.

The support SUP may be disposed on the stage STG. A lower portion of the support portion SUP may be disposed in the depression portion RES. The support part SUP may extend in the first direction DR1 and the third direction DR3 . The support part SUP may have a plate shape defined by the first direction DR1 and the third direction DR3 . The upper surface of the support part SUP may have a plane defined by the first and second directions DR1 and DR2 . The upper surface of the support part SUP may extend longer in the first direction DR1 than in the second direction DR2 .

The support part SUP is formed in a rigid type and may include stainless steel. A lower portion of the support portion SUP may have a greater width than other portions of the support portion SUP based on the first and second directions DR1 and DR2 .

A plurality of through holes AH may be defined in the support SUP. The through-holes AH may be defined on opposite side surfaces of the support unit SUP opposite to each other in the second direction DR2 .

The diaphragm DPM may be disposed on the support SUP to cover the support SUP. A structure in which the diaphragm DPM covers the support part SUP will be illustrated in FIGS. 7 and 8 hereinafter. The diaphragm DPM may include a material that has elasticity and can be expanded by an external force. For example, the diaphragm DPM may include silicon.

The diaphragm DPM may include a cover part COV for covering the support part SUP and a connection part CNP extending from a lower end of the cover part COV. The connection part CNP may extend in first and second directions DR1 and DR2 . A plurality of fastening holes CPH may be defined in the connection part CNP.

6 is an enlarged perspective view of the pressure pad shown in FIG. 1 .

Referring to FIG. 6 , the pressure pad PPD includes a pad PD extending in a first direction DR1 and a plurality of support bars SB1 and SB2 disposed in the pad PD and extending in the first direction DR1 . ) may be included.

When viewed in the first direction DR1 , the pad PD may have a tower shape having a long axis extending in the third direction DR3 . When viewed from the first direction DR1 , the upper surface of the pad PD may have a curved surface convex toward the upper direction. When viewed from the first direction DR1 , the lower surface of the pad PD may have a curved surface convex toward the lower direction.

The pad PD has elasticity and may be deformed by an external force. For example, the pad PD may include silicon that has elasticity and can be deformed by an external force. The pad PD may be supported by the support bars SB1 and SB2.

The support bars SB1 and SB2 may have a cylindrical shape extending in the first direction DR1 , but the shapes of the support bars SB1 and SB2 are not limited thereto. The support bars SB1 and SB2 may extend outside the pad PD. For example, the support bars SB1 and SB2 may extend longer than the pad PD in the first direction DR1 . For example, the two support bars SB1 and SB2 are illustrated, but the number of the support bars is not limited thereto.

The support bars SB1 and SB2 may be more rigid than the pad PD. The support bars SB1 and SB2 may include a metal having greater rigidity than the pad PD. For example, the support bars SB1 and SB2 may include stainless steel. The support bars SB1 and SB2 may be disposed in the pad PD to support the pad PD.

The pad PD and the support bars SB1 and SB2 may be disposed between the second pillars COL2 . The support bars SB1 and SB2 extend in the first direction DR1 , are disposed on the first pillars COL1 , and may be connected to the second pillars COL2 . The support bars SB1 and SB2 may be connected to inner side surfaces disposed on the first pillars COL1 among inner side surfaces of the second pillars COL2 facing each other.

Both sides of the support bars SB1 and SB2 may be connected to and fixed to the second pillars COL. However, an embodiment of the present invention may not be limited thereto. For example, both sides of the support bars SB1 and SB2 may be connected to the second pillars COL and moved by a predetermined distance in the third direction DR3 . For this configuration, elastic members that are vertically buffered are disposed on the second pillars COL and may be connected to both sides of the support bars SB1 and SB2.

The pad PD may not be connected to the first pillars COL1 . The pad PD may be supported by support bars SB1 and SB2 connected to the second pillars COL2 .

The support bars SB1 and SB2 include a first support bar SB1 extending in the first direction DR1 and a second support bar extending in the first direction DR1 and disposed on the first support bar SB1 ( SB2) may be included. The size of the first support bar SB1 may be different from the size of the second support bar SB2 . The size may be defined by diameters of the first support bar SB1 and the second support bar SB2 .

7 is a cross-sectional view taken along line I-I' shown in FIG. 5 . 7 illustrates a support SUF supporting the display panel and the guide film.

For example, FIG. 7 is a cross-sectional view of the stage STG shown in FIG. 1 and the pressure pad PPD shown in FIG. 6 .

Referring to FIG. 7 , the support SUF may include a support SUP, a diaphragm DPM, and a pressure pad PPD. The diaphragm DPM and the pressure pad PPD may be disposed on the support SUP. The pressure pad PPD may be disposed on the diaphragm DPM on the upper surface of the support unit SUP. The first and second support bars SB1 and SB2 may be disposed in the pad PD to support the pad PD.

The support SUP and the diaphragm DPM may be disposed on the stage STG. A lower portion of the support portion SUP may be disposed in the depression portion RES defined in the stage STG. A cavity CVT may be defined in the support SUP. The cavity CVT may open downward in the support SUP. The cavity CVT may be defined as a main air passage extending in the third direction DR3 and formed in the support unit SUP. The cavity (CVT) may be a passageway for air. For example, the cavity CVT may extend in the third direction DR3 , but is not limited thereto, and the cavity CVT may form a predetermined inclination angle with the third direction DR3 and may extend upward. have.

The through holes AH may extend from the cavity CVT toward opposite side surfaces of the support unit SUP in the second direction DR2 . Accordingly, the through-holes AH may be defined on opposite side surfaces of the support unit SUP opposite to each other in the second direction DR2 .

For example, the through holes AH may extend in the second direction DR2 . However, the present invention is not limited thereto, and the through holes AH may form a predetermined inclination angle with the second direction DR2 and extend toward both side surfaces of the support unit SUP. 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.

The air injection hole AIH in which the depression RES is defined may extend in the third direction DR3 . When viewed from the third direction DR3 , the air injection hole AIH may overlap the cavity CVT. The air injection hole AIH may be defined as an air injection passage through which air passes.

Air may be provided to the air injection hole AIH, the cavity CVT, and the through-holes AH, but the embodiment of the present invention is not limited thereto. For example, various gases or various fluids including air may be provided in the air injection hole AIH, the cavity CVT, and the through hole AH.

The diaphragm DPM may be connected to the stage STG after covering the support part SUP. The cover part COV may cover the support part SUP. The connection part CNP may extend parallel to the stage STG from the lower end of the cover part COV and may be connected to the stage STG. In order to connect the connector CNP to the stage STG, a plurality of fastening units CU may be disposed in the fastening holes CPH to be connected to the stage STG.

When viewed from the first direction DR1 , the size of the cross-section of the first support bar SB1 may be different from the size of the cross-section of the second support bar SB2 . For example, the size of the cross-section of the first support bar SB1 may be greater than the size of the cross-section of the second support bar SB2 .

8A is a cross-sectional view taken along line II-II' shown in FIG. 5 .

For example, FIG. 8A is a cross-sectional view of the stage STG shown in FIG. 1 and the pressure pad PPD shown in FIG. 6 .

Referring to FIG. 8A , a plurality of cavities CVT may be provided. The plurality of cavities CVT may extend in the third direction DR3 and may be arranged in the first direction DR1 . When viewed in a plan view, the cavities CVT may overlap the pad PD. The through-holes AH may extend from the cavities CVT.

A plurality of air injection holes AIH may be defined in a portion of the stage STG in which the depression RES is defined. The air injection holes AIH may be disposed to respectively correspond to the cavities CVT. When viewed in a plan view, each of the air injection holes AIH may overlap a corresponding cavity CVT among the cavities CVT.

8B is a diagram illustrating a shape of a cavity according to another embodiment of the present invention.

Exemplarily, FIG. 8B is shown as a cross-section corresponding to FIG. 8A.

Referring to FIG. 8B , unlike the cavities CVT illustrated in FIG. 8A , a single cavity CVT may be defined in the support SUP. Unlike the structure shown in FIG. 8A , a larger single cavity CVT may be defined in the support SUP. When viewed in a plan view, the single cavity CVT may overlap the pad PD. In this case, the through-holes AH may extend from the single cavity CVT.

9A and 9B are diagrams illustrating a lamination apparatus according to an embodiment of the present invention.

9A is a plan view of a lamination apparatus 1000 according to an exemplary embodiment. FIG. 9B is an enlarged view of the bending area BA of the lamination apparatus 1000 of FIG. 9A .

Referring to FIG. 9A , the lamination apparatus 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 then be attached on the display layer 200 .

The support SUF may support the display layer 200 . The support SUF may include a support part, a diaphragm, and a pressure pad. Details will be described later.

The guide film GFM may be disposed between the support SUF and the display module DM. The adhesive layer 100 may be disposed between the guide film GFM and the display module DM. The adhesive layer 100 may adhere the display module DM to the guide film GFM. Accordingly, the guide film GFM may guide the display module DM when the display module DM and the window are bonded to each other.

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 is adjacent to the bending area BA and may be provided in plurality. The bending area BA of the display module DM may have a curved shape. The bending part may be referred to as a curvature part or a folding part.

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.

The adhesive layer 100 may include a first portion 110 and a second portion 120 . The first portion 110 is disposed 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 is formed between the non-bending area FA and the flat surface. It may be disposed between the parts FLP.

The first portion 110 of the adhesive layer 100 may correspond to a portion having no adhesive force, and the second portion 120 may correspond to a portion having an adhesive force. 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 .

The guide film GFM may include various materials including plastic having a predetermined modulus. In an embodiment, the modulus of the guide film GFM may be higher than that of the display module DM. A high modulus of the guide film GFM may cause high stress in the bending area BA of the display module DM. In the lamination apparatus 1000 according to an embodiment of the present invention, the adhesive force is removed from the first portion 110 of the adhesive layer 100 to relieve stress in the bending area BA of the display module DM.

Referring to FIG. 9B , the display module DM may include a protective film PF, a display panel DP, and an anti-reflection film POL. The protective film PF may be disposed between the adhesive layer 100 and the display panel DP. The protective film PF may be attached under the display panel DP to protect the display panel DP from external impact. The second part 120 of the adhesive layer 100 is adhered to the protective film PF, but the first part 110 is not adhered to the protective film PF.

The anti-reflection film POL may be disposed between the display panel DP and the adhesive film ADF. The anti-reflection film POL may reduce reflectance of external light incident from the top of the display device DD toward the display panel DP. For example, the antireflection film POL may include a retarder and/or a polarizer.

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 area BA of the display panel DP when viewed from a cross-sectional view. The neutral plane (NP) may correspond to a plane or a portion in which compression or tension does not occur in the bending area (BA). In an exemplary embodiment, the neutral plane NP may be disposed in the center of the display panel DP in a cross-section. In this case, a portion close to the adhesive layer 100 may be compressed with respect to the neutral plane NP of the display panel DP, and a portion close to the adhesive film ADF may be stretched. In an embodiment of the present invention, the neutral plane NP is defined on the display panel DP in the bending area BA of the display module DM, so that the display module is in a bent state together with the guide film GFM ( Stress generated on the display panel DP in the bending area BA of the DM) may be relieved.

In an embodiment, the thickness T1 of the adhesive film ADF may be thicker than the thickness T2 of the anti-reflection film POL. According to an exemplary embodiment, the tensile force applied to the display panel DP may be reduced while maintaining the thickness of the adhesive film ADF to be thick. That is, in the lamination apparatus according to the exemplary embodiment, the neutral plane NP may be defined inside the display panel DP while maintaining the thickness so that the adhesive film ADP has sufficient adhesive force.

10A and 10E are diagrams illustrating a lamination method according to an embodiment of the present invention.

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

10B and 10C , the adhesive film ADF may be attached on the anti-reflection film POL. The anti-reflection film POL is disposed on the display panel DP.

The display layer 200 including the display module DM and the adhesive film ADF may be attached on the guide film GFM by the preliminary adhesive layer 100 - 1 . The preliminary adhesive layer 100 - 1 may be entirely applied between the protective film PF and the guide film GFM of the display module DM. The preliminary adhesive layer 100 - 1 may adhere the bending area BA and the non-bending area FA of the display module DM to the guide film GFM.

An ultraviolet laser (UVL) may be irradiated toward the pre-adhesive layer 100 - 1 from the ultraviolet radiation module (UVM). The guide film GFM may include a material through which ultraviolet rays are transmitted. The ultraviolet laser (UVL) may pass through the guide film (GFM) from below the guide film (GFM) to be irradiated to the pre-adhesive layer (100-1). Specifically, the ultraviolet laser (UVL) may be irradiated to a portion of the preliminary adhesive layer 100 - 1 overlapping the bending area BA of the display module DM.

The ultraviolet laser UVL is not irradiated to the other portion of the preliminary adhesive layer 100 - 1 overlapping the non-bending area FA of the display module DM through the mask MSK.

The adhesive layer 100 - 1 may include an ultraviolet curable adhesive. Here, the UV-curable adhesive may include a material that normally has adhesive strength, but loses adhesive strength when irradiated with UV light. The ultraviolet curing adhesive is not particularly limited.

In FIGS. 10C and 10D , when an ultraviolet laser (UV) is irradiated to the bending area BA of the preliminary adhesive layer 100 - 1 , the adhesive force of the irradiated portion is removed, and the first portion 110 and the second portion 120 . ) may be formed with the adhesive layer 100 of the present invention including. The first portion 110 of the adhesive layer 100 overlaps the bending area BA and has the adhesive force removed. The second portion 120 is in a state in which the adhesive force is maintained. Accordingly, the curved portion that is a portion of the guide film GFM overlapping the bending area BA may be detached from the display module DM by the ultraviolet laser UV.

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 the 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).

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

Referring to FIG. 10E , a plurality of jigs JIG is provided, and the jigs JIG are portions of the guide film GFM adjacent to both ends of the guide film GFM opposite to each other in the second direction DR2 . can be placed in The jigs JIG may hold opposite sides of the guide film GFM in the first direction DR1 . The guide film GFM may be moved by the jigs JIG.

11 to 17 are views for explaining a method of manufacturing a display device using a lamination facility including a lamination device.

Referring to FIG. 11 , the guide film GFM, the display module and the adhesive film (hereinafter, the display layer 200 ) attached on the guide film GFM are disposed on the support SUF by the jigs JIG. can be Specifically, the guide film GFM may be disposed on the diaphragm DPM and the pressure pad PPD. The jigs JIG may move downward to provide the guide film GFM and the display layer 200 attached to the guide film GFM on the pressure pad PPD. The pressure pad PPD may support the bending area BA of the display layer 200 .

11 and 12 , the guide film GFM is moved downward by the jigs JIG, and a portion of the guide film GFM overlaps the bending area BA of the display layer 200 . It may be disposed on the pressure pad PPD. A curved portion that is a portion of the guide film GFM overlapping the bending area BA of the display layer 200 may contact the pad PD of the pressure pad PPD. The bending area BA of the display layer 200 in contact with the pad PD may be bent along the curved surface of the upper surface of the pad PD. At this time, since the bending area BA of the display layer 200 and the first part 110 of the adhesive layer 100 to which the guide film GFM is attached do not have adhesive force, the display panel according to the bending of the display layer 200 is bent. It can relieve stress and prevent defects.

The jigs JIG may move both ends of the guide film GFM in a downward direction to be disposed in the fixing grooves FGV defined in the tension parts TNP. Thereafter, the jigs JIG may be removed from the guide film GFM.

Both ends of the guide film GFM may be fixed to the fixing grooves FGV. Although not shown, fixing units for fixing both ends of the guide film GFM (eg, screws for pressing the guide films) may be disposed in the fixing grooves FGV. The tension parts TNP may move apart from each other by the first moving parts MOV1 in the second direction DR2 to flatten the guide film GFM.

12 and 13 , the rollers ROL may move in a third direction DR3 and a second direction DR2 . As described above, the rollers ROL may be moved in the third direction DR3 by the second moving parts MOV2 , and may move in the second direction DR2 by the third moving parts MOV3 .

The rollers ROL may contact the guide film GFM to move the guide film GFM. The rollers ROL may contact portions of the guide film GFM adjacent to the display panel DP (refer to FIG. 10D ). The rollers ROL may be disposed adjacent to the lower end of the support unit SUP. The rollers ROL may be disposed adjacent to side surfaces of the support unit SUP opposite to each other in the second direction DR2 . The rollers ROL may be adjacent to the lower end of the diaphragm DPM. For example, the rollers ROL may be adjacent to the lower end of the cover part COV.

The guide film GFM is disposed on the side surfaces of the diaphragm DPM and the pressure pad PPD, and the display layer 200 is formed on the side surfaces of the diaphragm DPM and the pressure pad PPD by the guide film GFM. may be placed on the Side surfaces of the diaphragm DPM may be defined as portions of the diaphragm DPM adjacent to side surfaces of the support unit SUP opposite to each other in the second direction DR2 . The diaphragm DPM may support the non-bending area FA of the display layer 200 .

The display layer 200 may be disposed to be spaced apart from the rollers ROL. In practice, the rollers ROL may guide the display layer 200 such that the display layer 200 is disposed adjacent to the support unit SUP and the diaphragm DPM.

As the guide film GFM moves by the rollers ROL, the tension parts TNP may also move together with the rollers ROL. As the rollers ROL move closer to each other toward the support SUP, the tension parts TNP may move toward each other in the second direction DR2 by the first moving parts MOV1 .

Hereinafter, from FIG. 14 , the tension parts TNP are omitted.

Referring to FIG. 14 , a window fixing chuck FCK may be disposed on the diaphragm DPM and the pressure pad PPD. The window fixing chuck FCK may be disposed to face the diaphragm DPM and the pressure pad PPD. Substantially, the stage STG may be moved to a position where the window fixing chuck FCK is disposed so that the window fixing chuck FCK may be disposed on the pressure pad PPD.

The groove GOV defined in the window fixing chuck FCK may face the pressure pad PPD. The groove GOV may be a window fixing groove. An end inside the groove GOV facing the pressure pad PPD may have a concave shape. Specifically, at an end inside 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.

A window WIN may be disposed in the groove GOV of the window fixing chuck FCK. The window WIN disposed in the groove GOV may have a bent shape. Although not shown, vacuum suction holes for adsorbing and fixing the window WIN may be defined on the inner surface of the window fixing chuck FCK in which the groove GOV is defined.

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

Since the display layer 200 is disposed along the upper surface of the pad PD having a convex curved surface and the support portion SUP having a plate shape extending in the third direction DR3 , it may have a bent shape. The display layer 200 may include a bending part BP having a bent shape and first flat parts PP1 extending from the bending part BP and having a flat shape.

The bending part BP may be disposed on the pad PD having a curved surface. The first flat parts PP1 may be disposed on side surfaces of the diaphragm DPM adjacent to side surfaces of the support part SUP by extending from the bending part BP in a downward direction (or in the third direction DR3 ). . Also, the first flat parts PP1 may be disposed on side surfaces of the pad PD opposite to each other in the second direction DR2 . When the display layer 200 is unfolded, the bending portion BP may be disposed between the first flat portions PP1 .

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

When the window WIN is unfolded, the folding part FP may be disposed between the second flat parts PP2 . The bending part BP may be attached to the folding part FP by the lamination facility BOD, and the first flat parts PP1 may be attached to the second flat parts PP2 . This operation will be described in detail below.

14 and 15A , the support SUP, the diaphragm DPM, and the pressure pad PPD may be disposed in the groove GOV, and the display layer 200 may be disposed in the groove GOV. In order to arrange the support SUP, the diaphragm DPM, and the pressure pad PPD in the groove GOV, the window fixing chuck FCK may move in the third direction DR3 .

However, the present invention is not limited thereto, and the stage STG may move in the third direction DR3 so that the support SUP, the diaphragm DPM, and the pressure pad PPD are disposed in the groove GOV. Alternatively, the window fixing chuck FCK and the stage STG may be moved together in the third direction DR3 to be closer to each other.

When the window fixing chuck (FCK) moves in the third direction (DR3) and the diaphragm (DPM) and the pressure pad (PPD) are inserted into the groove (GOV), the display module (DM, see FIG. The display module DM and the window WIN may be disposed to be spaced apart from each other so as not to be attached to the window WIN by the ADF. Accordingly, in the groove GOV, the display module DM may be disposed to be spaced apart from the window WIN by a predetermined distance. For example, a distance between the display module DM and the window WIN may be 0.3 mm to 0.7 mm.

Fig. 15B is an enlarged view of the pressure pad shown in Fig. 15A;

Referring to FIG. 15B , the window WIN disposed on the window fixing chuck FCK does not contact the display layer 200 . Since the window fixing chuck FCK does not press the pressure pad PPD, the pressure pad PPD may maintain its original shape. In this case, the first support bar SB1 and the second support bar SB2 may be spaced apart from each other by the first distance GP1 in the third direction DR3 . The pad PD may have a first thickness TH1 based on the third direction DR3 . The pad PD may have a first width WM1 based on the second direction DR2 .

Referring to FIG. 16A , the window fixing chuck FCK may further move 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 by the window fixing chuck FCK.

The pad PD may shrink in the third direction DR3 and expand in the second direction DR2 by the pressure by the window fixing chuck FCK. The pad PD may be deformed into a shape corresponding to the concave curved surface of the window fixing chuck FCK defining the groove GOV. Since the pad PD is contracted in the third direction DR3 , a gap between the first support bar SB1 and the second support bar SB2 may be reduced.

The bending part BP of the display layer 200 disposed on the pressure pad PPD may be attached to the folding part FP of the window WIN adjacent to the bending part BP. Specifically, when the window fixing chuck FCK presses the pad PD, the shape of the pad PD is deformed, and the bending part BP is attached to the folding part FP by the pressure of the pad PD. can be

Substantially, the bending part BP may be attached to the folding part FP by the adhesive film ADF disposed on the display layer 200 .

Portions of the first flat portions PP1 adjacent to the bending portion BP may move toward portions of the adjacent second flat portions PP2 according to the pressure of the pad PD expanding in the second direction DR2 . . Accordingly, according to the deformation of the pad PD, portions of the first flat portions PP1 adjacent to the bending portion BP may also be attached to portions of the second flat portions PP2 adjacent to the folding portion FP. have.

Fig. 16B is an enlarged view of the pressure pad shown in Fig. 16A;

Referring to FIG. 16B , the window fixing chuck FCK presses the pressure pad PPD to deform the pressure pad PPD, and the window WIN may contact the display layer 200 . In this case, the first support bar SB1 and the second support bar SB2 may be spaced apart from each other by the second gap GP2 . The second interval GP2 may be smaller than the first interval GP1 . That is, the first support bar SB1 and the second support bar SB2 may be disposed more adjacent to each other than in FIG. 15B .

In FIG. 6 , when the window fixing chuck FCK presses the pressure pad PPD in a state in which the first support bar SB1 and the second support bar SB2 are fixed to the second pillars COL2 , the pad The first support bar SB1 and the second support bar SB2 disposed in the PD may be bent downward.

Based on the third direction DR3 , the pad PD may have a second thickness TH2 smaller than the first thickness TH1 . That is, the pad PD may contract in the third direction DR3 . Based on the second direction DR2 , the pad PD may have a second width WM2 greater than the first width WM1 . That is, the pad PD may extend in the second direction DR2 .

According to the deformation of the pad PD, a portion of the diaphragm DPM between the pad PD and the support SUP may be bent.

Referring to FIG. 17 , air may be injected into the air injection hole AIH, and the air may be provided to the cavity CVT through the air injection hole AIH. Air AIR provided to the cavity CVT may be provided to the through-holes AH through the cavity CVT. The cavity CVT and the through-holes AH may substantially define an air path through which the air AIR moves. Air AIR may be provided to the diaphragm DPM through the through holes AH.

For example, the air AIR may be provided to the cavity CVT and the through-holes AH through the air injection hole AIH, but the embodiment of the present invention is not limited thereto. For example, various gases or fluids including air may be provided to the cavity CVT and the through hole AH through the air injection hole AIH.

The diaphragm DPM may be expanded toward the outside of the support unit SUP by the air AIR provided through the through hole AH. The expanded diaphragm DPM may push the first flat parts PP1 of the display layer 200 adjacent to side surfaces of the diaphragm DPM toward the outside of the support part SUP. As a result, the first flat portions PP1 may be attached to the second flat portions PP2 by moving toward the second flat portions PP2 adjacent to the first flat portions PP1 .

In fact, the first flat parts PP1 may be attached to the second flat parts PP2 by the adhesive film ADF disposed on the display layer 200 .

Although not shown, after the display layer 200 is attached to the window WIN, the guide film GFM may be separated from the display layer 200 .

When the bent display layer 200 is inserted and attached to the bent window WIN without using the lamination facility BOD of the present invention, the first flat parts PP1 are first formed by the second flat parts PP2 . can be attached to In this case, a bonding defect in which the bending part BP is not attached to the folding part FP may occur.

However, in an embodiment of the present invention, since the display layer 200 is sequentially attached to the window WIN from the bending portion BP to the first flat portions PP1 by the lamination facility BOD, the display layer 200 ) can be more easily attached to the window (WIN). Accordingly, adhesion failure between the display layer 200 and the window WIN may be prevented.

The flat display layer 200 and the flat window WIN are bent by 180 degrees according to the structures of the pressure pad PPD and the support portion SUP and the window fixing chuck FCK, and the bending portion BP having a semicircular shape and the folding portion The cementation process for the part (FP) has been described. In the 180 degree bent state, if the flat display layer 200 is described as an example, one of the first flat parts PP1 moves by 180 degrees with respect to the bending part BP to move the other first flat part PP1 by 180 degrees. 1 shows a structure disposed to face the flat portion PP1 and extend in the third direction DR3 .

However, the embodiment of the present invention is not limited thereto, and the lamination equipment BOD of the present invention may be used to bond the window WIN to the display module DM (refer to FIG. 10D ) having various curved surfaces. For example, by changing the shape of the groove (GOV) defined in the window fixing chuck (FCK) and the shape of the pressure pad (PPD) and the support part (SUP), the display module DM and the window WIN are smaller than 180 degrees They can be bent to be greater than or equal to 90 degrees and joined to each other. That is, the bending part BP and the folding part FP may be formed to have various curved shapes.

18 is a view illustrating a panel support for being coupled to a display layer and a window. 19 is a view illustrating a display device manufactured by a display panel, a window, and a panel support unit coupled to each other.

Referring to FIG. 18 , the display layer 200 and the window WIN having a bent structure and bonded to each other may be coupled to the panel support P_SP. The panel support part P_SP may be disposed between the first flat parts PP1 of the display layer 200 . The panel support P_SP may include a bracket for supporting the display layer 200 , a battery for supplying power to the display layer 200 , and a system board for controlling the operation of the display layer 200 .

18 and 19 , the bending part BP of the display layer 200 may define the side display part SSD of the display device DD. The first flat portions PP1 of the display layer 200 may define the front display unit USD of the display device DD and the rear display unit LSD of the display device DD.

The front display unit USD, the rear display unit LSD, and the side display unit SSD may display a predetermined image. For example, the front display unit USD may display predetermined icons, and the side display unit SSD may display the date and weather. However, this is illustrative, and the front display unit USD and the side display unit SSD may display various images. Although not shown in the perspective view, the rear display unit LSD may also display various images.

20A to 20C are views illustrating a step of removing the guide film according to an embodiment of the present invention.

After the lamination step of bonding the display module DM and the window WIN through the adhesive film ADF, a step of peeling the guide film GFM is required. The step of removing the guide film GFM from the display module DM includes removing the guide film GFM from the bending area BA of the display module DM and removing it from the non-bending area FA. can do.

In this embodiment, the step of removing the guide film GFM includes the first step of removing the guide film GFM from the bending area BA of the display module DM and the guide film GFM after the first step. The second step of removing from the non-bending area FA of the display module DM may be included.

In FIG. 20A , removing the guide film GFM may include removing the second portion 120 of the adhesive layer 100 . The step of removing the guide film GFM may include removing the adhesive force of the second portion 120 of the adhesive layer 100 . For example, removing the guide film GFM may include irradiating an ultraviolet laser (UVL) onto the second portion 120 . Like the first part 110 , the second part 120 of the adhesive layer 100 may include an ultraviolet curable adhesive. When the ultraviolet laser UVL is irradiated from the ultraviolet radiation module UVM toward the second part 120 , the adhesive force of the second part 120 may be removed. The guide film GFM may be detached from the second part 120 .

In FIGS. 20B and 20C , the step of removing the guide film GFM is performed by first connecting the bar tube RT between the bending area BA of the display module DM and the curved portion CVP of the guide film GFM. It may include inserting in the direction DR1. Inserting the bar tube RT may be a first step of removing the guide film GFM from the bending area BA of the display module DM.

The rod tube RT may include a space capable of injecting air therein. When air is injected inside, the rod tube (RT) can inflate. When the rod tube RT is inserted between the bending area BA and the curved portion CVP in the first direction DR1, air may be injected to inflate it. Then, the step of removing the guide film (GFM) may include moving the expanded rod tube (RT) in the third direction (DR3). The expanded bar tube RT may remove the guide film GFM from the display module DM while moving in the third direction DR3 away from the bending area DA. The step of moving the bar 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.

As described above, an embodiment has been disclosed in the drawings and the specification. Although specific terms are used herein, they are used only for the purpose of describing the present invention, and are not used to limit the meaning or scope of the present invention described in the claims. Therefore, it will be understood by those of ordinary skill in the art that various modifications and equivalent tile embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

BOD: Lamination Equipment
DD: display device
1000: lamination device
SUF: support
DM: display module
GFM: guide film
100: adhesive layer
110: first part
120: second part
BA: bending area
FA: non-bending area

Claims (23)

a display module in which a bending area and a non-bending area are defined;
a guide film disposed on one surface of the display module; and
an adhesive layer disposed between the display module and the guide film;
The adhesive layer includes a first portion overlapping the bending region of the display module and a second portion overlapping the non-bending region of the display module, wherein the first portion is non-adhesive to the guide film and the second portion is the guide Film and adhesive lamination device. The lamination apparatus of claim 1 , wherein the display module includes a protective film disposed on the guide film, a display panel disposed on the protective film, and an anti-reflection film disposed on the display panel. The lamination apparatus of claim 2 , wherein the adhesive layer is disposed between the protective film and the guide film, and is adhered to a lower surface of the protective film. The lamination apparatus of claim 2 , wherein a neutral plane is defined on the bending area of the display module, and the neutral plane is defined on the display panel in a cross-sectional view. The lamination apparatus of claim 1 , wherein the adhesive layer includes an ultraviolet curable adhesive. The lamination apparatus of claim 1 , wherein the guide film includes a material that transmits ultraviolet rays. The lamination apparatus of claim 2 , further comprising an adhesive film disposed on the display module, wherein a thickness of the adhesive film is greater than a thickness of the anti-reflection film. According to claim 1, further comprising a support for supporting the display module, the support,
a support in which a plurality of through-holes are defined;
a diaphragm disposed on the support and covering the support; and
a pressure pad disposed on the diaphragm on the upper surface of the support;
The pressure pad,
pad part; and
and at least one support bar disposed in the pad part and extending in a first direction. The lamination apparatus of 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. According to claim 8, further comprising a window fixing chuck to which the window is fixed,
A window fixing groove facing the pressing pad is defined in the window fixing chuck, and the display module is disposed between the pressing pad and the window fixing groove. providing a display module in which a bending area and a non-bending area adjacent to the bending area are defined and including a display panel displaying an image;
disposing an adhesive layer including a first portion overlapping the bending region and a second portion overlapping the non-bending region on a lower surface of the display module;
disposing a guide film on a lower surface of the adhesive layer; and
and removing the first portion of the adhesive layer. 12. The method of claim 11, wherein removing the first portion of the adhesive layer comprises removing an adhesive force of the first portion. The method of claim 12, wherein the adhesive layer comprises a UV-curable adhesive,
The step of removing the adhesive force of the first portion of the adhesive layer further comprises the step of irradiating ultraviolet rays to the first portion. 13. The method of claim 12, wherein the guide film comprises a curved portion adhered to the first portion of the adhesive layer and a flat portion adhered to the second portion,
The step of removing the adhesive force of the first portion includes detaching the first portion of the adhesive layer and the curved portion of the guide film from each other. The method of claim 11 , wherein the providing the display module comprises:
providing the display panel; and
and attaching an adhesive film to an upper surface of the display panel. The lamination method of claim 11 , further comprising: providing a support including a pressure pad supporting the bending area of the display module and a support unit supporting the non-bending area of the display module. The lamination method of claim 16 , wherein the guide film is disposed between the support and the display module to seat the display module on the support. The method of claim 15 , further comprising: disposing a window on the adhesive film in which a folding area overlapping the bending area and a non-folding area overlapping the non-bending area of the display module are defined; and
The lamination method further comprising removing the guide film from the display module. The method of claim 18 , wherein 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
and a second step of detaching the guide film from the non-bending area of the display module. 19. The method of claim 18, wherein removing the guide film further comprises removing an adhesive force of the second portion of the adhesive layer. The method of claim 20, wherein removing the guide film comprises:
inserting a bar tube between the bending area of the display module and the guide film in a first direction;
inflating the rod tube; and
and moving the inflated rod tube in a direction perpendicular to the first direction and away from the bending area. The lamination method according to claim 20, wherein the adhesive layer includes an ultraviolet curable adhesive, and removing the adhesive force of the second part comprises irradiating ultraviolet rays to the second part. preparing a display panel including a bending part and a non-bending part adjacent to the bending part, to which an adhesive film is attached to an upper surface and a guide film is attached to a lower surface thereof;
detaching the guide film from the bending part;
preparing a diaphragm disposed on a support part to cover the support part and a pressure pad disposed on the diaphragm on an upper surface of the support part;
disposing the display panel on side surfaces of the diaphragm adjacent to side surfaces of the support part and on the pressure pad;
disposing a window in the groove of the window fixing chuck on the pressure pad;
disposing the diaphragm and the pressure pad in the groove;
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 by moving the window fixing chuck downward to press the pressure pad; and
expanding the diaphragm to attach non-bending parts of the display panel extending downward from the bending part and adjacent to the side surfaces of the diaphragm to non-folding parts of the window adjacent to the non-bending parts; A method of manufacturing a display device.

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