KR102655238B1 - Panel bottom sheet including release film and method for peeling the release film - Google Patents

Abstract

A panel lower seat is provided. The panel lower sheet includes a flat portion including first and second sides facing each other and third and fourth sides facing each other, and a bending portion disposed on the first side and the third side of the flat portion. A release film comprising a lower panel member, a cover part covering the lower panel member, and a grip part extending from the cover part and protruding further than a short side of the bending part, wherein the cover part is a bending part disposed on the first side. It includes a first cover part that covers the part and a second cover part that covers the bending part disposed on the third side, and the grip part includes a first grip part extending from the first cover part and a second cover part extending from the second cover part. It includes two grip portions, and a first direction in which the first side and the second side extend and a second direction in which the third side and the fourth side extend intersect each other, and the first side and the fourth side intersect. The length that the second side extends in the first direction is greater than the length that the third side and the fourth side extend in the second direction, and the length that the first cover portion extends in the first direction is greater than the length that the first cover portion extends in the first direction. A panel lower sheet greater than the length extending in the second direction.

Description

{Panel bottom sheet including release film and method for peeling the release film}

The present invention relates to a panel lower sheet including a release film and a method of peeling the release film.

A display device is a device that displays an image and includes a display panel such as an organic light emitting display panel or a liquid crystal display panel. A panel lower member is attached to the lower part of the display panel. The lower panel member may include various functional sheets to protect the display panel from heat generation, external shock, etc. In addition, the lower panel member may further include an input auxiliary device such as a digitizer or a driving device that is difficult to place on the upper part of the display panel.

The panel lower sheet may include a lower panel member and a release film. The release film protects the panel lower member during the process of manufacturing and transporting the lower panel member. When attaching the panel lower member to the display panel, the release film is peeled and removed.

The problem to be solved by the present invention is to provide a panel lower sheet including a release film that reduces the force required during peeling.

The problem to be solved by the present invention is to provide a peeling method that reduces the force required to peel the release film including the bending portion.

The problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

The panel lower sheet according to one embodiment has a flat portion including first and second sides facing each other and third and fourth sides facing each other, and the first and third sides of the flat portion. A release film comprising a lower panel member including a disposed bending portion, a cover portion covering the lower panel member, and a grip portion extending from the cover portion and protruding further than a short side of the bending portion, wherein the cover portion includes the first A first cover part covering a bending part disposed on a side and a second cover part covering a bending part arranged on the third side, wherein the grip part includes a first grip part extending from the first cover part and the second cover. It includes a second grip portion extending from the portion, wherein a first direction in which the first side and the second side extend and a second direction in which the third side and the fourth side extend intersect each other, The length that the first side and the second side extend in the first direction are greater than the length that the third side and the fourth side extend in the second direction, and the length that the first cover portion extends in the first direction is greater than the length of the second cover portion extending in the second direction.

The area of the first cover part may be larger than the area of the second cover part.

The cover part may further include a third cover part covering the bending part disposed on the second side and a fourth cover part covering the bending part disposed on the fourth side.

The grip portion may further include a third grip portion extending from the fourth cover portion.

The shape of the second cover part and the shape of the fourth cover part may be the same, and the shape of the second grip part and the shape of the third grip part may be the same.

The grip part may further include a fourth grip part extending from the third cover part.

The shape of the first cover part and the shape of the third cover part may be the same, and the shape of the first grip part and the shape of the fourth grip part may be the same.

The cover part is connected to the first cover part, the second cover part, the third cover part, and the fourth cover part, and may further include a fifth cover part covering the flat part.

The shape of the cover portion of the release film may be the same as the shape of the lower panel member.

The grip portion may extend to the outside of the panel lower member.

The angle formed by the flat portion and the bent portion of the panel lower member may be 90 degrees or more and less than 180 degrees.

A release film peeling method according to an embodiment includes a flat portion including first and second sides facing each other and third and fourth sides facing each other, and the flat portion being disposed on the first to fourth sides of the flat portion. A release film consisting of a lower panel member including a bending portion, a cover portion covering the flat portion of the lower panel member and the lower panel member, and a grip portion extending from the cover portion and protruding further than a short side of the bending portion. Preparing a panel lower sheet comprising, moving the grip portion to peel off a portion of the release film attached to the bending portion of the panel lower member, and moving the panel lower sheet and/or the release film, A step of peeling off the remainder of the release film that was not peeled in the step of peeling off a portion of the release film, wherein the cover portion includes a first cover portion covering a bending portion disposed on the first side, and a first cover portion covering the bending portion disposed on the second side. It includes a second cover part covering the bending part disposed, a third cover part covering the bending part arranged on the third side, and a fourth cover part covering the bending part arranged on the fourth side, and the grip part includes the first cover part covering the bending part disposed on the fourth side. It includes a first grip part extending from the first cover part, a second grip part extending from the third cover part, and a third grip part extending from the fourth cover part, and the first side and the second side extend in a direction. The first direction and the second direction in which the third side and the fourth side extend intersect each other, and the length of the first side and the second side extending in the first direction is the third side and the fourth direction. The four sides are longer than the length extending in the second direction, and the length of the first cover part extending in the first direction is greater than the length of the second cover part extending in the second direction.

The angle formed by the flat portion and the bent portion of the panel lower member may be 90 degrees or more and less than 180 degrees.

Preparing the panel lower sheet may include pre-forming the panel lower member and the release film.

The shape of the cover portion of the release film may be the same as the shape of the lower panel member.

The step of peeling off a portion of the release film includes gripping the first grip portion, the second grip portion, and the third grip portion, and a state in which the first grip portion, the second grip portion, and the third grip portion are gripped. The method may further include peeling the first cover part, the third cover part, and the fourth cover part from the panel lower member by moving the first grip part, the second grip part, and the third grip part.

The step of peeling off the remainder of the release film may further include moving the first grip portion from the first side to the second side.

The cover part may further include a fourth grip part extending from the second cover part.

The step of peeling off a portion of the release film includes gripping the first grip portion, the second grip portion, and the third grip portion, and a state in which the first grip portion, the second grip portion, and the third grip portion are gripped. The method may further include peeling the first cover part, the third cover part, and the fourth cover part from the panel lower member by moving the first grip part, the second grip part, and the third grip part.

Peeling off the remainder of the release film may include moving the panel lower member in a third direction intersecting the first direction and the second direction and in a direction inclined to the second direction.

Specific details of other embodiments are included in the detailed description and drawings.

According to the panel lower sheet including the release film according to one embodiment, the force required when peeling the release film can be reduced.

Additionally, according to the release film peeling method according to one embodiment, the force required to peel off the release film including the bending portion can be reduced.

Effects according to the embodiments are not limited to the contents exemplified above, and further various effects are included in the present specification.

1 is an exploded perspective view of a display device according to an embodiment.
FIG. 2 is a cross-sectional view taken along line II-II' of the display device of FIG. 1.
Figure 3 is a cross-sectional view taken along line III-III' in Figure 1.
Figure 4 is a cross-sectional view of a panel lower sheet according to one embodiment.
Figure 5 is a top view of the panel lower sheet before preforming.
Figure 6 is a side view of the panel lower sheet before preforming.
Figures 7 and 8 are side views showing the process of preforming the lower panel sheet.
Figure 9 is a perspective view showing the preformed state of the lower panel sheet.
FIG. 10 is a cross-sectional view taken along line Ⅹ-Ⅹ' of the lower sheet of the panel of FIG. 9.
Figure 11 is a plan view showing a state in which the clamp device grips the grip portion of the preformed release film.
FIG. 12 is a cross-sectional view taken along line ⅩⅡ-ⅩⅡ' of FIG. 11.
Figure 13 is a plan view showing a state in which the release film covering one bend of the lower panel member has been peeled off.
Figures 14 and 15 are diagrams illustrating a process of peeling and removing a release film from a panel lower sheet according to an embodiment.
Figures 16 and 17 are diagrams illustrating a process of peeling and removing a release film from a panel lower sheet according to another embodiment.
Figures 18 and 19 are diagrams illustrating a process of peeling and removing a release film from a lower panel sheet according to another embodiment.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in other forms. In other words, the present invention is defined only by the scope of the claims.

When an element or layer is referred to as “on” or “on” another element or layer, it refers not only to being directly on top of another element or layer, but also to having another element or layer in between. Includes all. On the other hand, when an element is referred to as “directly on” or “directly on”, it indicates that there is no intervening element or layer.

The same reference numerals are used for identical or similar parts throughout the specification.

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

1 is an exploded perspective view of a display device according to an embodiment. FIG. 2 is a cross-sectional view taken along line II-II' of the display device of FIG. 1. Figure 3 is a cross-sectional view taken along line III-III' in Figure 1.

Referring to FIGS. 1 to 3 , the display device 600 includes a display panel 200 and a lower panel member 100 disposed below the display panel 200 . The display device 600 may further include a window 400 disposed on the display panel 200 .

Unless otherwise defined, in this specification, “top,” “top,” and “top” refer to the display surface side based on the display panel 200, and “bottom,” and “bottom” refer to the display panel. Based on (200), it refers to the side opposite to the display surface.

The display device 600 may have a rectangular shape in plan view. The display device 600 may include both long sides and both short sides. The corner where the long side and short side of the display device 600 meet may be a right angle, but may be curved as shown in FIG. 1 . The planar shape of the display device 600 is not limited to the example, and may be circular or other shapes.

In the drawing, the first direction DR1 represents the direction in which the short side of the display device 600 extends, and the second direction DR2 represents the direction in which the long side of the display device 600 extends. Additionally, the third direction DR3 represents the thickness direction of the display device 600. The first direction DR1 and the second direction DR2 intersect each other perpendicularly, and the third direction DR3 is a direction that intersects the plane on which the first direction DR1 and the second direction DR2 lie. It intersects perpendicularly to both the direction DR1 and the second direction DR2. However, the directions mentioned in the examples should be understood as referring to relative directions, and the examples are not limited to the mentioned directions.

In one embodiment, the display device 600 may include a flat area FA and a bending area BA connected to the flat area FA and located around the flat area FA. The flat area (FA) is generally located on one plane. The bending area BA does not lie on the same plane as the flat area FA. For example, the bending area BA may be bent or curved downward from the plane where the flat area FA is located.

In one embodiment, the bending area BA may include a curved surface that is convexly curved in an outward direction. In another embodiment, the bending area BA has a flat surface, and the flat surface of the bending area BA may be located on a plane having a predetermined angle with the plane of the flat area FA.

The bending area BA may be located on both long sides and both short sides of the rectangular display device 600. However, it is not limited to this and may be located only on some of the long sides and both short sides.

The display panel 200, the touch member 300, the window 400, and the lower panel member 100, which will be described later, may all be located across the flat area FA and the bending area BA.

The display panel 200 is a panel that displays a screen, and may be, for example, an organic light emitting display panel. In the following embodiment, a case in which an organic light emitting display panel is applied as the display panel 200 is exemplified, but the present invention is not limited thereto, and the display panel 200 may be a display panel including a self-light emitting device other than an organic light emitting device. . For example, the self-luminous device may be a quantum dot light-emitting device, a micro light-emitting diode, or a nano-sized light-emitting diode. However, it is not limited to this, and the display panel 200 may be another type of display panel, such as a liquid crystal display device or an electrophoresis device.

The display panel 200 includes a plurality of organic light emitting elements disposed on a substrate. The substrate may be a rigid substrate made of glass, etc., or it may be a flexible substrate made of polyimide, etc. When a polyimide substrate is used as the substrate, the display panel 200 may be bent, bent, folded, or rolled.

A window 400 is disposed on the upper part of the display panel 200. The window 400 is disposed on the top of the display panel 200 to protect the display panel 200 and transmit light emitted from the display panel 200. The window 400 may be made of glass or the like.

The window 400 may be arranged to overlap the display panel 200 and cover the entire surface of the display panel 200 . The window 400 may be larger than the display panel 200. For example, the windows 400 may protrude outward from the display panel 200 on both short sides of the display device 600 . Although the window 400 may protrude from the display panel 200 on both long sides of the display device 600, the protrusion distance may be greater on both short sides.

In one embodiment, a touch member 300 may be disposed between the display panel 200 and the window 400. The touch member 300 may be arranged to overlap the display panel 200 . In some embodiments, the touch member 300 may have substantially the same size as the display panel 200, but is not limited thereto. The side of the touch member 300 and the side of the display panel 200 may be aligned, but are not limited thereto. The touch member 300 may be a rigid panel type, a flexible panel type, or a film type.

The display panel 200 and the touch member 300 can be coupled to each other through the first transparent bonding layer 510, and the touch member 300 and the window 400 can be bonded to each other through the second transparent bonding layer 520. Can be combined. The first transparent bonding layer 510 and the second transparent bonding layer 520 may each be made of optically clear adhesive (OCA) or optically clear resin (OCR).

In some embodiments, the touch member 300 may be omitted. In this case, the display panel 200 may include a touch electrode portion therein. That is, the touch electrode unit may be integrated with the display panel 200. For example, when the display panel 200 is provided with a thin film encapsulation layer that seals the organic light emitting device described above, the touch electrode unit may be positioned on the thin film encapsulation layer using the thin film encapsulation layer as a base surface. Additionally, the display panel 200 and the window 400 may be coupled to each other using an optically clear adhesive (OCA) or an optically clear resin (OCR).

A panel lower member 100 is disposed below the display panel 200. The panel lower member 100 may be arranged to overlap the display panel 200 . The panel lower member 100 may have substantially the same size as the display panel 200, but is not limited thereto. Additionally, the side of the panel lower member 100 and the side of the display panel 200 may be aligned, but are not limited thereto.

In addition, the panel lower member 100 may form the panel lower sheet 101 together with the release film PF that covers the panel lower member 100, and the panel lower member 100 may be attached to the display panel 200. Before being attached, the release film (see 'PF' in Figure 4) is peeled off and removed from the panel lower sheet 101.

Hereinafter, reference is made to FIG. 4 to describe the panel lower sheet 101 and the panel lower member 100 in detail.

Figure 4 is a cross-sectional view of a panel lower sheet according to one embodiment.

The panel lower sheet 101 may include a lower panel member 100 and a release film (PF) attached to the upper part of the lower panel member 100.

The lower panel member 100 may include a light absorption layer 110, a functional layer 120 disposed below the light absorption layer 110, and a top bonding layer 130 disposed on the light absorption layer 110.

The light absorption layer 110 may include a light absorption material such as black pigment or dye. The light absorption layer 110 may be black ink. The light absorption layer 110 may be formed by coating or printing. The light absorption layer 110 can prevent other components and wires disposed below the panel lower member 100 from being visible on the top, that is, the display surface of the display device 600. In other words, light incident from the outside can be prevented from being reflected by other components and wires disposed below the panel lower member 100 and being emitted to the display screen of the display device 600 . Additionally, light emitted from the display panel 200 can be prevented from being reflected by other components and wires disposed below the panel lower member 100 and being emitted onto the display screen of the display device 600 .

The functional layer 120 may perform at least one of the following functions: a heat dissipation function, an electromagnetic wave shielding function, a pattern visibility prevention function, a grounding function, a buffer function, and/or a strength reinforcement function. The functional layer 120 may be provided in various forms such as a layer, film, film, sheet, plate, or panel. When the panel lower member 100 includes a plurality of functional layers, the functional layers may be stacked to overlap each other. A functional layer can be stacked directly on top of another functional layer or disposed through a bonding layer.

Although not shown, the panel lower sheet 101 may further include a wiring pattern portion. The wiring pattern portion may be a digitizer. A digitizer is one of the input devices, and unlike input devices such as a keyboard or mouse, it receives location information indicated by the user on the screen. A digitizer, for example, recognizes the movement of a stylus pen and converts it into a digital signal. Digitizers can be provided in the form of films or panels. However, it is not limited to this, and various members including a dashed line pattern, such as a printed circuit board and a flexible printed circuit board, can be applied as the wiring pattern portion.

The top bonding layer 130 serves to attach the lower panel member 100 to the lower surface of the display panel 200. The top bonding layer 130 may include an adhesive layer and an adhesive layer. The adhesive layer and adhesive layer may be made of a resin layer containing a polymer material. Although not limited thereto, the resin layer may be, for example, a silicone-based polymer material, a urethane-based polymer material, a SU polymer polymer material with a silicone-urethane hybrid structure, an acrylic polymer material, an isocyanate-based polymer material, a polyvinyl alcohol-based polymer material, and gelatin. It may contain polymer-based materials, vinyl-based polymer materials, latex-based polymer materials, polyester-based polymer materials, polyester-based polymer materials, etc.

Before the release film PF is peeled and removed from the panel lower member 101, the release film PF may be disposed on the top bonding layer 130. The release film (PF) covers and protects the upper surface of the top bonding layer 130 before attaching the lower panel member 100 to the display panel 200, and attaches the lower panel member 100 to the display panel 200. At this time, the upper surface of the top bonding layer 130, which is peeled off and becomes a bonding surface, is exposed.

The top bonding layer 130 may be disposed on the entire surface of the light absorption layer 110, but is not limited to this and may be partially disposed at a level capable of bonding the release film PF and the lower panel sheet 100. .

The top bonding layer 130 is in contact with the release film (PF), but the panel lower member 100 and the release film (PF) are not completely attached, and may contact to the extent that the release film (PF) may be peeled off in a subsequent process. there is. In other words, the bonding force of the top bonding layer 130 to the panel lower sheet 100 is sufficient as long as the release film PF can be attached to the panel lower sheet 100 without separation during storage or transportation. . When peeling the release film PF, the top bonding layer 130 is preferably separated from the release film PF while still attached to the light absorption layer 110, and may not remain on the surface of the release film PF. That is, the bonding force of the top bonding layer 130 to the light absorption layer 110 may be greater than the bonding force of the top bonding layer 130 to the release film PF.

The release film (PF) may include polyethylene terephthalate (PET), polycarbonate (PC), polyimide (PI), or paper. The release film (PF) may be treated with a silicone solution on the upper surface of the film or a release coating layer containing a silicone-based resin may be formed, but is not limited thereto.

In some embodiments, the lower surface of the release film PF may have an embossed shape. The embossed shape on the lower surface of the release film PF is transferred to the upper surface of the top bonding layer 130 adjacent thereto, and accordingly, the upper surface of the top bonding layer 130 also has an embossed shape complementary to the lower surface shape of the release film PF. You can.

The display device 600 includes bending areas (BA) on both long sides and both short sides. Likewise, the display panel 200 of the display device 600 with the bending areas (BA) also has bending areas (BA) on both long sides and both short sides. It may include a bending area (BA). Before attaching the lower panel member 100 to the display panel 200, pre-forming may be performed. Preforming means preforming into a desired shape using a press, mold, etc. when performing hydroforming, bending processing, sheet metal processing, etc. That is, before attaching the lower panel member 100 to the display panel 200, the shape of the lower panel member 100 may be preformed to the shape of the display panel 200 including the bending area BA. As preforming is performed in this way, the panel lower member 100 can be accurately aligned with the display panel 200.

Hereinafter, a method of preforming the panel lower sheet 101 and a method of removing the release film (PF) after preforming will be described in detail.

Figure 5 is a top view of the panel lower sheet before preforming. Figure 6 is a side view of the panel lower sheet before preforming.

Referring to FIGS. 5 and 6 , before preforming, the panel lower sheet 101, that is, the panel lower member 100 and the release film PF may be substantially flat. The panel lower sheet 101 and the lower panel member 100 may include both long sides and both short sides, respectively. Both long sides are sides disposed on one side and the other side of the first direction DR1 in each of the panel lower sheet 101 and the panel lower member 100 and extend in the second direction DR2, and both short sides are sides of the panel lower sheet 101 and the lower panel member 100. The sides of each of 101 and the lower panel member 100 are disposed on one side and the other side of the second direction DR2 and extend in the first direction DR1.

The release film PF covers one side of the panel lower member 100. The release film PF may include a cover portion CV disposed to overlap the panel lower member 100 and a grip portion GR protruding from the cover portion CV to the outside of the panel lower member 100.

The cover portion (CV) of the release film (PF) has the same or substantially similar shape as the panel lower member 100 and is arranged to overlap the panel lower member 100 to generally cover the panel lower member 100. . The cover portion (CV) may have the same shape and size as the panel lower member 100 to completely cover one side of the panel lower member 100, but the cover portion (CV) is somewhat small in size and thus covers the lower panel member 100. Part of the border may be exposed.

The grip portion GR of the release film PF is connected to the cover portion CV and may protrude further than the end of the bending portion 100b covered by the cover portion. That is, the grip portion GR may not overlap the panel lower member 100 in the third direction DR3. Additionally, the grip portion GR may not cover the lower panel member 100. As the grip portion GR protrudes outward from the panel lower member 100, it becomes easy to hold the release film PF through the grip portion GR when peeling the release film PF. Therefore, the peeling process of the release film (PF) can proceed quickly. The grip portion GR may be located on one side and the other side of the cover portion CV in the first direction DR1, that is, both long sides, and on one side and the other side, that is, both short sides of the second direction DR2.

The length of the grip part (GR) extending from the cover part (CV) can be freely changed. In other words, the length protruding from the cover portion CV to the outside of the panel lower member 100 can be freely changed. In addition, the length that the grip portion (GR) disposed on both long sides extends in the second direction (DR2) and the length that the grip portion (GR) disposed on both short sides extend in the first direction (DR1) can be freely changed. there is. In this case, the length that the grip portion (GR) disposed on both long sides extends in the second direction (DR2) may be smaller than the length that the cover portion (CV) disposed on both long sides extends in the second direction (DR2). , At this time, the position where the grip part GR is placed can also be freely changed.

Release films (PF) include polyethylene terephthalate (PET), polyimide (PI), polycarbonate (PC), polyethylene (PE), polypropylene (PP), polysulfone (PSF), and polymethyl methacrylate (PMMA). , triacetylcellulose (TAC), cycloolefin polymer (COP), etc.

Figures 7 and 8 are side views showing the process of preforming the lower panel sheet. 7 and 8 show the long side side of the panel lower seat panel lower sheet 101, and the short side side of the panel lower seat panel lower sheet 101 is substantially the long side side of the lower panel seat panel lower sheet 101. The shape and profile are similar. Therefore, the following description will be made based on the long side side of the lower panel seat panel lower sheet 101, and this may also be applied to the short side side of the lower panel seat panel lower sheet 101.

Referring to FIGS. 7 and 8 , the lower panel member 100 to which the release film PF is attached may be preformed into a set shape. Here, the 'set shape' refers to a shape corresponding to the inner shape of the product to be transferred, that is, the display panel 200 (see FIG. 2).

The preforming device 20 may include an upper body 21 and a lower body 22. A panel lower member 100 to which a release film (PF) is attached is disposed between the upper body 21 and the lower body 22, and the upper body 21 and/or the lower body 22 are moved up and down, The lower panel member 100 to which the release film PF is attached can be pressed. The upper body 21 and the lower body 22 may include a heating device capable of applying heat to the lower panel member 100 to which the release film PF is attached.

Specifically, the pre-formed lower body 22 is disposed at the lower part of the panel lower member 100 to which the release film (PF) is attached and has a groove portion 22a corresponding to the inner cross-sectional shape of the display panel 200 (see FIG. 2). You can have Additionally, the pre-formed upper body 21 may be formed to have a protrusion 21a that is disposed on the upper part of the panel lower member 100 to which the release film PF is attached and protrudes toward the groove 22a. The groove 22a and the protrusion 21a may be formed to have substantially the same shape.

As the upper body 21 descends the lower body 22, the upper surface of the lower panel member 100 to which the release film PF is attached may be pressed toward the lower body 22. Accordingly, the panel lower member 100 to which the release film PF is attached between the upper body 21 and the lower body 22 can be preformed into a set shape.

When this preforming step is performed, a separate guide pin (not shown), etc. may be used to fix the position of the lower panel member 100 to which the release film PF is attached.

Figure 9 is a perspective view showing the preformed state of the lower panel sheet. FIG. 10 is a cross-sectional view taken along line Ⅹ-Ⅹ' of the lower sheet of the panel of FIG. 9. FIG. 10 shows a cross-section of the panel lower sheet 101 along the first direction DR1. A cross section of the panel lower sheet 101 cut along the second direction DR2 may be formed to have substantially the same shape, with only the length extending in the second direction DR2 being different.

Referring to FIGS. 9 and 10, in the preformed state, the panel lower member 100 is bent upward from the end of each side of the flat portion 100a along the circumference of 100a and the flat portion 100a and extends. may include a bending portion 100b. When the panel lower member 100 is attached to the display panel 200 to form the display device 600, the flat portion 100a corresponds to the flat area FA of the display device 600, and the bending portion 100b may correspond to the bending area BA of the display device 600.

In detail, the planar shape of the preformed lower panel member 100 may be substantially the same as the planar shape of the display device 600. Accordingly, the flat portion 100a of the lower panel member 100 may include both long sides and both short sides, and the bent portion 100b may be located on both long sides and both short sides of the flat portion 100a. However, the bending parts 100b located on both long sides and both short sides may be positioned at a distance from each other near the corner where the long sides and both short sides meet. That is, the length of each bending part 100a extending in the second direction DR2 from both long sides is shorter than the length extending of the flat part 100a in the second direction DR2, and each bending part 100a from both short sides ) may be shorter than the length of the flat portion 100a extending in the first direction DR1.

The other end opposite to one end of the bent part 100b connected to the flat part 100a may have rounded corners. In other words, one edge and the other edge of the bending portion 100b located on both long sides of the flat portion 100a and extending in the second direction DR2 may be rounded. Additionally, edges of one side and the other side of the bending portion 100b located on both short sides of the flat portion 100a and extending in the first direction DR1 in the first direction DR1 may be rounded. However, the present invention is not limited to this, and each bending part 100b located on both long sides and both short sides of the flat part 100a may be formed in a polygonal shape such as a rectangle.

Each bent part 100b located on both long sides and both short sides of the flat part 100a may be formed simultaneously through the same preforming process. However, it is not limited to this, and through two preforming processes, the bending portion 100b located on both long sides of the flat portion 100a is first formed, and then the bending portion 100b located on both short sides of the flat portion 100a is formed. A bending portion 100b may be formed.

The angle θ formed by the flat portion 100a and the bent portion 100b of the panel lower member 100 may be 90° or greater, but is not limited thereto.

The release film PF preformed together with the panel lower member 100 may entirely cover the outer side of the panel lower member 100. In other words, the cover portion CV of the release film PF may cover the outside of the flat portion 100a and the outside of the bent portion 100b of the panel lower member 100. That is, although not limited thereto, the shapes of the lower panel member 100 and the release film PF may be substantially the same.

The cover part CV may include first to fifth cover parts CV1, CV2, CV3, CV4, and CV5. The first cover part (CV1) and the second cover part (CV2) cover the bending part (100b) disposed on one side and the other side of the panel lower member 100 in the first direction (DR1), respectively, and the third cover part ( CV3) and the fourth cover part CV4 may cover the bending part 100b disposed on one side and the other side of the panel lower member 100 in the second direction DR2, respectively. The fifth cover part (CV5) is connected to the first to fourth cover parts (CV1, CV2, CV3, and CV4) and can cover the flat part (100a).

Although not limited thereto, the shape of the first cover part (CV1) and the shape of the second cover part (CV2) are substantially the same, and the shape of the third cover part (CV3) and the shape of the fourth cover part (CV4) are substantially the same. may be substantially the same. The length that the first cover part (CV1) and the second cover part (CV2) extend in the second direction (DR2) is the length that the third cover part (CV3) and the fourth cover part (CV4) extend in the first direction (DR1). It may be larger than the extended length. Additionally, the areas of the first cover part CV1 and the second cover part CV2 may be larger than those of the third cover part CV3 and the fourth cover part CV4.

The grip portion GR may include first to fourth grip portions GR1, GR2, GR3, and GR4. The first grip part GR1 is from the first cover part CV1, the second grip part is from the second cover part CV2, the third grip part is from the third cover part CV3, and the fourth grip part is from the above. It may extend from the fourth cover portion CV4.

Although not limited thereto, the shape of the first grip portion GR1 and the shape of the second grip portion GR2 are substantially the same, and the shapes of the third grip portion GR3 and the fourth grip portion GR4 are substantially the same. can do. The length that the first grip part (GR1) and the second grip part (GR2) extend in the second direction (DR2) is longer than the length that the third grip part (GR3) and the fourth grip part (GR4) extend in the first direction (DR1). It can be big. Additionally, the areas of the first grip part GR1 and the second grip part GR2 may be larger than those of the third grip part GR3 and the fourth grip part GR4.

Below, a method of peeling and removing the release film (PF) of the preformed panel lower sheet 101 will be described. In addition, to aid explanation, one side of the thickness direction, that is, the third direction DR3, is formed from the release film PF attached to the flat portion 100a of the panel lower member 100 from the flat portion of the panel lower member 100 ( 100a), and the other side of the third direction DR3 faces from the flat portion 100a of the panel lower member 100 to the release film PF attached to the flat portion 100a of the panel lower member 100. Let's refer to the direction.

With reference to FIGS. 11 to 13 , a process of peeling off the cover portion (CV) covering the bent portion 100b of the panel lower member 100 will be described.

Figure 11 is a plan view showing a state in which the clamp device grips the grip portion of the preformed release film. FIG. 12 is a cross-sectional view taken along line ⅩⅡ-ⅩⅡ' of FIG. 11. Figure 13 is a plan view showing a state in which the release film covering one bend of the lower panel member has been peeled off. 11 to 13 illustrate a case of gripping the first grip portion GR1 disposed on the long side of the flat portion 100a of the panel lower member 100, but the description thereof refers to the second to fourth grip portions ( It can also be applied when gripping GR2, GR3, GR4).

The preformed panel lower member 100 is placed on a stage (not shown). The preformed lower panel member 100 can be placed on the stage using a peeling robot 30 or the like. The peeling robot 30 may include a clamp device 31 and a vacuum suction device 32.

A vacuum suction device 32 may be located on the inside of the flat portion 100a of the preformed panel lower member 100. The vacuum suction device 32 can support and secure the preformed lower panel member 100. The vacuum suction device 32 can maintain a degree of vacuum that does not deform the shape of the preformed lower panel member 100. Additionally, the vacuum suction device 32 can transport the adsorbed lower panel member 100 from one point to another.

The clamp device 31 may grip the first grip portion GR1 of the preformed release film PF fixed by the vacuum suction device 32. The clamp device 31 may include an upper plate 31a, a lower plate 31b facing the upper plate 31a, and a motorized member 31c that adjusts the gap between the upper plate 31a and the lower plate 31b. Additionally, the clamp device 31 may move the first grip portion GR1 of the gripped release film PF from one point to another point. Accordingly, the first cover portion CV1 attached to the panel lower member 100 may be peeled off.

The length of the upper plate 31a and the lower plate 31b of the clamp device 31 may be greater than the length of the first grip portion GR1 of the release film PF. In other words, when the clamp device 31 is located on one side of the first direction DR1 and grips the first grip portion GR1 extending in the second direction DR2, the upper plate 31a of the clamp device 31 and The length at which the lower plate 31b extends in the second direction DR2 may be greater than the length at which the first grip portion GR1 extends in the second direction DR2. Accordingly, when the clamp device 31 grips the first grip part GR1 of the release film PF, it can have a uniform grip force over the entire area of the first grip part GR1 of the release film PF.

The clamp device 31 may move in a direction inclined to the first direction DR1 and the third direction DR3 while gripping the first grip portion GR1 of the release film PF. In detail, the clamp device 31 gripping the first grip portion GR1 of the release film PF moves from the bending portion 100b of the panel lower member 100 toward the outside of the panel lower member 100. While doing so, it moves toward the other side in the third direction (DR3). As the clamp device 31 moves in a direction inclined in the first direction DR1 and the third direction DR3 while gripping the first grip portion GR1 of the release film PF, the panel lower member 100 ) The first cover part CV1 of the release film PF may be peeled from the bending part 100b.

Hereinafter, with reference to FIGS. 14 and 15, the remainder of the release film PF covering the flat portion 100a of the panel lower member 100 is peeled off to remove the release film PF from the panel lower sheet 101. This explains how to completely remove .

Figures 14 and 15 are diagrams illustrating a process of peeling and removing a release film from a panel lower sheet according to an embodiment. FIG. 14 shows the release film PF covering the four bending portions 100a of the panel lower member 100 being peeled and fixed, and FIG. 15 is a cross-sectional view taken along line ⅩV-ⅩV' of FIG. 14. .

Referring to FIGS. 14 and 15, according to the method of removing the cover portion (CV) of the release film (PF) covering the bending portion (100b) of the panel lower member 100 described above, The first to fourth cover parts (CV1, CV2, CV3, CV4) covering the four bending parts (100b) of the lower panel member (100) were all peeled off, and the release film (PF) was removed by the clamp device (31). All of the grip portions (GR) can be fixed.

The vacuum suction device 32 may move in a direction inclined to the first direction DR1 and the third direction DR3 while supporting and fixing the panel lower member 100. In other words, the vacuum suction device 32 may move in the first direction DR1 while supporting and fixing the lower panel member 100 and may move toward one side in the third direction DR3. Since one end of the release film PF, that is, the grip portion GR, is fixed by the clamp device 31, the vacuum suction device 32 is tilted in the first direction DR1 and the third direction DR3. As it moves to Thus, the release film PF can be completely removed from the panel lower sheet 101. The movement distance of the vacuum suction device 32 in a direction inclined to the first direction DR1 and the third direction DR3 is sufficient to completely peel the release film PF from the panel lower sheet 101.

However, in order to completely remove the release film (PF) from the panel lower sheet 101, the vacuum suction device 32 holding the panel lower member 100 is not moved, and the clamp device holding the release film PF is not moved. (31) may move in a direction opposite to the movement direction of the vacuum suction device 32 described above to peel and completely remove the release film PF from the panel lower sheet 101. In addition, both the vacuum suction device 32 fixing the panel lower member 100 and the clamp device 31 fixing the release film PF move to peel the release film PF from the panel lower sheet 101. You can also remove it completely.

The release force generated in the process of peeling the release film PF from the panel lower member 100 may include a vertical stress acting in a direction perpendicular to the surface and a shear stress acting parallel to the surface as if being pushed.

According to the above-described peeling method, the phenomenon of non-peeling of all or part of the release film PF from the preformed panel lower member 100 can be prevented or suppressed. Part of the release film PF attached to the four bending parts 100b of the panel lower member 100, that is, the first to fourth cover parts CV1, CV2, CV3, and CV4, is first removed, and then the panel lower member 100 ), the remainder of the release film (PF) attached to the flat portion 100a, that is, the fifth cover portion (CV5), is removed in the process of peeling the release film (PF) from the panel lower member 100. Most of the force is normal stress, and little shear stress may occur. That is, a portion of the release film (PF) attached to the four bending portions (100b) of the panel lower member 100 and the remainder of the release film (PF) attached to the flat portion (100a) of the panel lower member 100. When removing, the direction of peeling the release film (PF) is generally from the panel lower member 100 toward the release film (PF), so the release force generated in all parts of the release film (PF) is mostly vertical. Stress may occur.

Accordingly, shear stress that may occur in the process of peeling the release film PF from the panel lower member 100 can be prevented or suppressed. As a result, when peeling the release film PF, the shear stress is reduced, thereby preventing the release film PF from being peeled and damaging the panel lower member 100 from bending. In addition, by preventing the release film PF from being disconnected during peeling, it is possible to prevent or suppress a decrease in production yield of the panel lower sheet 101 due to disconnection of the release film PF.

After peeling and removing the release film PF from the panel lower sheet 101, a display panel can be attached to one side of the panel lower member 100.

Hereinafter, other embodiments will be described. In the following embodiments, the description of the same configuration as the already described embodiment will be omitted or simplified, and the differences will be mainly explained.

Figures 16 and 17 are diagrams illustrating a process of peeling and removing a release film from a panel lower sheet according to another embodiment. FIG. 16 shows a portion of the release film PF covering the four bending portions 100a of the lower panel member 100 being peeled and fixed, and FIG. 17 is a view taken along the line ⅩⅤⅡ-ⅩⅤⅡ' of FIG. 16. This is a cross-sectional view.

Referring to FIGS. 16 and 17 , the method of removing the release film PF_1 according to the present embodiment excludes the second cover portion CV2 covering the bending portion 100b disposed on the other side of the first direction DR1. A method of removing the cover portion (CV) of the release film (PF) in which the remaining first cover portion (CV1), third cover portion (CV3), and fourth cover portion (CV4) cover the bending portion (100b) described above. The grip portion GR differs from the embodiments of FIGS. 11 to 15 in that it does not include the second grip portion GR2.

Specifically, when removing the release film PF_1 from the panel lower sheet 101_1 according to this embodiment, a portion of the release film PF_1 covering the four bending portions 100b of the panel lower member 100 A portion of the release film PF covering the bent portion 100b disposed on the other side of the flat portion 100a of the middle panel lower member 100 in the first direction DR1, that is, the second cover portion CV2, will not be peeled off. You can. The other part of the release film (PF_1) covering the remaining bending part (100b), that is, the first cover part (CV1), the third cover part (CV3), and the fourth cover part (CV4), is the panel lower member 100 described above. It can be peeled off according to a method of removing a part of the release film PF covering one bending portion 100b.

At this time, the release film PF_1 disposed on the other side of the flat part 100a of the panel lower member 100 in the first direction DR1 includes a second cover part CV2, and the second cover part CV2 The second grip portion GR2 extending from may not be included.

The first grip portion (GR1) of the release film (PF_1) covering the bending portion (100b) disposed on one side of the long side of the flat portion (100a) of the lower panel member (100) may be maintained in a gripped state by the clamp device (31). You can. The clamp device 31 gripping the first grip portion GR1 can move from one side of the first direction DR1 of the flat portion 100a of the panel lower member 100 to the other long side, and thus, the panel lower sheet. The release film (PF_1) can be completely peeled off and removed from (101).

Even in this case, shear stress that may occur in the process of peeling the release film PF_1 from the panel lower member 100 can be prevented or suppressed. As a result, when peeling the release film (PF_1), the release force can be reduced. As the release force, particularly the shear stress, is reduced, the release film PF_1 cannot be peeled off and the panel lower member 100 is prevented from being bent. In addition, by preventing the release film PF_1 from being disconnected during peeling, it is possible to prevent or suppress a decrease in production yield of the panel lower sheet 101_1 due to disconnection of the release film PF_1.

In addition, since the release film PF_1 covering the bent portion 100b disposed on the other side of the flat portion 100a of the panel lower member 100 in the first direction DR1 does not include the grip portion GR, the release film ( PF_1) Materials and costs required for production can be reduced.

Figures 18 and 19 are diagrams illustrating a process of peeling and removing a release film from a panel lower sheet according to another embodiment. FIG. 18 shows a part of the release film PF_2 covering the four bending portions 100a of the panel lower member 100 being peeled and fixed, and FIG. 19 is a plan view of the panel lower sheet 101_2 of FIG. 18. am.

Referring to FIGS. 18 and 19, the method of removing the release film (PF) according to this embodiment involves bending portions 100b disposed on both long sides and both short sides of the flat portion 100a of the lower panel member 100. A part of the release film (PF_2) surrounding the bending portion (100b) disposed on the other side of the first direction (DR1) and the other side of the second direction (DR2) of the covering release film (PF_2), that is, the second cover portion (CV2) and the second cover portion (CV2) 4 The cover portion CV4 is different from the embodiments of FIGS. 11 to 15 in that it is not peeled off.

Specifically, when removing the release film PF_2 from the panel lower sheet 101_2 according to this embodiment, the panel of the release film PF_2 covering the four bending portions 100b of the panel lower member 100 A portion of the release film PF covering the bent portion 100b disposed on the other side of the first direction DR1 and the other side of the second direction DR2 of the flat portion 100a of the lower member 100, that is, the second cover portion ( CV2) and the fourth cover portion CV4 may not be peeled off. In addition, the other part of the release film PF_2 covering the remaining bending portion 100b, that is, the first cover portion CV1 and the third cover portion CV3, is one bending portion of the panel lower member 100 described above. (100b) may be peeled off depending on the method of removing the cover portion (CV) of the release film (PF) covering it.

The panel lower member 100 may further include a first corner portion (CN1) and a second corner portion (CN2). The first corner portion CN1 is the edge of the flat portion 100a of the lower panel member 100 located between the two bending portions 100a from which the release film PF_2 was peeled, and the second corner portion CN2 is the release portion CN2. It refers to the edge of the flat portion 100a of the lower panel member 100 located between the two bent portions 100a where the film PF_2 is not peeled.

The clamp device 31 gripping the grip portion GR can move in a direction from the first corner portion CN1 toward the second corner portion CN2, and thus, the release film is separated from the panel lower sheet 101. (PF_2) can be completely peeled off and removed.

Even in this case, shear stress that may occur in the process of peeling the release film PF_2 from the panel lower member 100 can be prevented or suppressed. As a result, when peeling the release film (PF_2), the release force can be reduced. As the release force, particularly the shear stress, is reduced, the release film PF_2 cannot be peeled off and damage caused by bending the lower panel member 100 can be prevented. In addition, by preventing the release film PF_2 from being disconnected during peeling, it is possible to prevent or suppress a decrease in production yield of the panel lower sheet 101_1 due to disconnection of the release film PF_2.

In the above, the description has been made focusing on the embodiments of the present invention, but this is only an example and does not limit the present invention, and those skilled in the art will understand the present invention without departing from the essential characteristics of the embodiments of the present invention. It will be apparent that various modifications and applications not illustrated above are possible. For example, each component specifically shown in the embodiments of the present invention can be modified and implemented. And these variations and differences in application should be construed as being included in the scope of the present invention as defined in the appended claims.

100: Panel lower member
100a: flat part
100b: bending part
101: Panel lower sheet
200: display panel
300: Absence of touch
400: Windows
PF: release film
CV: cover part
GR: Grip part

Claims (20)

A panel lower member including a flat portion including first and second sides facing each other and third and fourth sides facing each other, and a bending portion disposed on the first and third sides of the flat portion. ; and
A release film comprising a cover part covering the lower panel member and a grip part extending from the cover part and protruding further than a short side of the bending part,
The cover portion includes a first cover portion that covers a bending portion disposed on the first side and a second cover portion that covers a bending portion disposed on the third side,
The grip portion includes a first grip portion extending from the first cover portion and a second grip portion extending from the second cover portion,
A first direction in which the first side and the second side extend, and a second direction in which the third side and the fourth side extend, intersect each other, and the first side and the second side extend in the first direction. The length extended in the direction is greater than the length extended in the second direction by the third side and the fourth side,
A panel lower sheet in which the length of the first cover portion extending in the first direction is greater than the length of the second cover portion extending in the second direction. According to claim 1,
A panel lower sheet in which an area of the first cover part is larger than an area of the second cover part. According to claim 1,
The cover portion further includes a third cover portion that covers the bending portion disposed on the second side and a fourth cover portion that covers the bending portion disposed on the fourth side. According to clause 3,
The panel lower sheet wherein the grip portion further includes a third grip portion extending from the fourth cover portion. According to clause 4,
The shape of the second cover part and the shape of the fourth cover part are the same, and the shape of the second grip part and the shape of the third grip part are the same. According to clause 4,
The panel lower sheet wherein the grip portion further includes a fourth grip portion extending from the third cover portion. According to clause 6,
A panel lower sheet in which the shape of the first cover portion and the shape of the third cover portion are the same, and the shape of the first grip portion and the shape of the fourth grip portion are the same. According to clause 4,
The cover part is connected to the first cover part, the second cover part, the third cover part, and the fourth cover part, and further includes a fifth cover part covering the flat part. According to clause 8,
A panel lower sheet wherein the shape of the cover portion of the release film is the same as the shape of the panel lower member. According to claim 1,
A panel lower sheet wherein the grip portion extends to the outside of the panel lower member. According to claim 1,
A panel lower sheet wherein the angle formed by the flat portion and the bent portion of the panel lower member is 90 degrees or more and less than 180 degrees. A panel lower member including a flat portion including first and second sides facing each other and third and fourth sides facing each other, and a bending portion disposed on the first to fourth sides of the flat portion, and Preparing a panel lower sheet including a release film including the flat portion of the panel lower member, a cover portion covering the panel lower member, and a grip portion extending from the cover portion and protruding further than a short side of the bending portion;
peeling off a portion of the release film attached to the bending portion of the panel lower member by moving the grip portion; and
Moving the panel lower sheet and/or the release film to peel off the remainder of the release film that was not peeled in the step of peeling off a portion of the release film,
The cover part includes a first cover part that covers the bending part arranged on the first side, a second cover part covering the bending part arranged on the second side, and a third cover part covering the bending part arranged on the third side. and a fourth cover part covering the bending part disposed on the fourth side,
The grip portion includes a first grip portion extending from the first cover portion, a second grip portion extending from the third cover portion, and a third grip portion extending from the fourth cover portion,
A first direction in which the first side and the second side extend, and a second direction in which the third side and the fourth side extend, intersect each other, and the first side and the second side extend in the first direction. The length extended in the direction is greater than the length extended in the second direction by the third side and the fourth side,
A release film peeling method wherein the length of the first cover part extending in the first direction is greater than the length of the second cover part extending in the second direction. According to claim 12,
A release film peeling method, wherein the angle formed between the flat portion and the bent portion of the panel lower member is 90 degrees or more and less than 180 degrees. According to claim 12,
The step of preparing the panel lower sheet includes pre-forming the panel lower member and the release film. According to claim 12,
A release film peeling method wherein the shape of the cover portion of the release film is the same as the shape of the lower panel member. According to claim 12,
The step of peeling off a portion of the release film includes gripping the first grip portion, the second grip portion, and the third grip portion, and a state in which the first grip portion, the second grip portion, and the third grip portion are gripped. Release film peeling further comprising peeling the first cover part, the third cover part, and the fourth cover part from the panel lower member by moving the first grip part, the second grip part, and the third grip part. method. According to claim 16,
The step of peeling off the remainder of the release film further includes moving the first grip portion from the first side to the second side. According to claim 12,
The release film peeling method wherein the cover part further includes a fourth grip part extending from the second cover part. According to clause 18,
The step of peeling off a portion of the release film includes gripping the first grip portion, the second grip portion, and the third grip portion, and a state in which the first grip portion, the second grip portion, and the third grip portion are gripped. Release film peeling further comprising peeling the first cover part, the third cover part, and the fourth cover part from the panel lower member by moving the first grip part, the second grip part, and the third grip part. method. According to clause 19,
Peeling off the remainder of the release film includes moving the panel lower member in a third direction intersecting the first direction and the second direction and in a direction inclined to the second direction. .

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