Backsheet for supporting a flexible display panel and method of manufacturing the same

Abstract

The present application provides a backboard for supporting a flexible display panel and a manufacturing method thereof, the backboard comprising: a glass plate formed with an aperture; two coating layers respectively covering two surfaces of the glass plate; and a filler filling the aperture and connected with the two coating layers, the glass plate comprising: two non-deformation structure parts arranged apart from each other; and a deformation structure part located between the two non-deformation structure parts and connecting the two non-deformation structure parts, the deformation structure part being formed across a deformation interval in a length direction, the deformation structure part being formed in a mesh shape through through-holes penetrating along a thickness direction of the deformation structure part and forming the aperture. The backboard for supporting a flexible display panel and the manufacturing method thereof of the present application solve the operation problem of a handwriting recognition pen existing in the prior art backboard based on a metal material.

Description

Technical Field

[0001] This invention relates to a flexible display device, and more specifically to a back plate supporting a flexible display panel in a flexible display device. Background Technology

[0002] With the recent attention garnered by foldable mobile devices with foldable and unfoldable screens, research on flexible display devices, which can not only be folded and unfolded but also rolled up, has also been very active. Typically, flexible display devices consist of a flexible display panel and a back plate, with the back plate supporting the flexible display panel from the back to keep it flat.

[0003] Korean Patent Publication No. 10-2021-0087604, which serves as the background technology for this invention, discloses a metal-based backplate. The metal material, being an electrical conductor, absorbs electromagnetic signals, potentially causing problems with handwriting recognition pen operation. To address this issue, backplates made of carbon fiber resin or carbon fiber reinforced polymer (CFRP) composite materials, which possess electrical insulating properties, are used. However, due to the inherent characteristics of these composite materials, processing is extremely difficult, thus limiting the manufacturing process for achieving finer details. Currently used sandblasting processes suffer from time consumption and the use of expensive DFR films. Summary of the Invention

[0004] Technical issues

[0005] The purpose of this invention is to provide a backplate for supporting flexible display panels and a method for manufacturing the same, which solves the operation problems of handwriting recognition pens in existing metal-based backplates.

[0006] Another object of the present invention is to provide a backplate for supporting flexible display panels and a method thereof that can reduce manufacturing costs compared with existing CFRP-based backplates.

[0007] Technical solution

[0008] To achieve the aforementioned objectives of the present invention, according to one aspect of the present invention, a backplate for supporting a flexible display panel is provided, comprising: a glass sheet having pores; two coating layers respectively covering both sides of the glass sheet; and a filler filling the pores and connected to the two coating layers. The glass sheet includes: two non-deformable structural portions disposed separately from each other; and a deformable structural portion located between and connecting the two non-deformable structural portions. The deformable structural portion is formed to span a deformation interval in the length direction, and the deformable structural portion is formed into a mesh by through openings that penetrate along the thickness direction of the deformable structural portion and form the pores.

[0009] To achieve the above-mentioned objectives of the present invention, according to another aspect of the present invention, a method for manufacturing a backplate for supporting a flexible display panel is provided, comprising: a pattern forming step of forming a pattern on a glass substrate; a cutting step of cutting the glass substrate according to the pattern to separate substrate cut pieces from the glass substrate; and a coating step of coating liquid on both sides of the substrate cut pieces, wherein in the pattern forming step, a mesh pattern is formed across a predetermined interval across the center portion of the longitudinal direction of the substrate cut pieces; in the cutting step, the substrate cut pieces are separated such that the mesh pattern remains at the center portion of the longitudinal direction of the substrate cut pieces; and in the coating step, the coating liquid fills the pores of the mesh pattern.

[0010] The effects of the invention

[0011] According to the present invention, all the above-described objectives of the present invention can be achieved. Specifically, since the backplate of the present invention is made of glass, the operational problems of existing handwriting recognition pens with backplates based on metal materials are solved.

[0012] Moreover, the backplate of the present invention is manufactured by using glass with appropriate hardness compared to carbon fiber resin composite material CFRP, which is very difficult to process, making it suitable for sandblasting. Therefore, the process time is shortened, and inexpensive DFR film can be used, thus reducing manufacturing costs.

[0013] Furthermore, glass offers superior flatness compared to materials like metals and CFRP, and it's made of the same material as the window glass (UTG, Ultra Thin Glass) used to protect flexible display panels. Therefore, when used as a backplate for panel support, it minimizes image distortion. Since glass has a coefficient of thermal expansion of 8.7 × 10⁻⁶, its performance is excellent. -7 / K, the coefficient of thermal expansion of carbon fiber is -0.74×10- 5 / K, therefore, when CFRP is used as the back panel, the distortion of the display module caused by the difference in thermal expansion coefficient can lead to image distortion. Conversely, when the back panel is made of glass, since the material is the same as the glass covering the window, the distortion of the flexible display panel due to the difference in thermal expansion coefficient is prevented.

[0014] On the other hand, the present invention forms a coating and filler based on carbon materials with excellent thermal conductivity, thereby ensuring heat dissipation and thermal diffusivity. Attached Figure Description

[0015] Figure 1 A schematic diagram illustrating a simplified configuration of a flexible display device employing a backplate for supporting a flexible display panel according to an embodiment of the present invention;

[0016] Figure 2 for Figure 1 The figure shown is a perspective view of a back plate for supporting a flexible display panel according to an embodiment of the present invention.

[0017] Figure 3 To show Figure 2 The diagram shows a cross-sectional view along line A-A' of the backplate used to support the flexible display panel.

[0018] Figure 4 To show Figure 2 The top view shown is of the glass sheet in the backplate used to support the flexible display panel.

[0019] Figure 5 A perspective view of a backplate for supporting a flexible display panel according to another embodiment of the present invention;

[0020] Figure 6 To show Figure 5 The top view shown is of the glass sheet in the backplate used to support the flexible display panel.

[0021] Figure 7 A flowchart illustrating a method for manufacturing a backplate for supporting a flexible display panel according to an embodiment of the present invention;

[0022] Figure 8 For a brief explanation Figure 7 A diagram showing the execution status of the pattern formation and cutting steps. Detailed Implementation

[0023] The structure and function of embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] Figure 1 A schematic diagram illustrating a simplified configuration of a flexible display device employing a backplate for supporting a flexible display panel according to an embodiment of the present invention is shown, with a cross-sectional structure. See also Figure 1 The flexible display device 10 includes: a flexible display panel 11; a flexible overlay window (UTG) 12 attached to the top of the display panel 11 to protect it; and a back plate 100 according to an embodiment of the invention, attached to the back of the display panel 11 to support it. A curved portion is formed in the flexible display device 10 across a predetermined lengthwise interval E, enabling the flexible display device 10 to be foldable. If the interval E forming the curved portion becomes sufficiently long, the flexible display device 10 can also be rollable, which also falls within the scope of the invention.

[0025] Figure 2 Show Figure 1 The diagram shows a perspective view of a backplate 100 for supporting a flexible display panel according to an embodiment of the present invention. See also... Figure 2 The back plate 100 (hereinafter referred to as "back plate") used to support the flexible display panel is a plate with a generally rectangular shape, including a central layer 110, a first coating layer 120 and a second coating layer 130 that respectively cover both sides of the central layer 110. The back plate 100 is disposed on the back of the flexible display panel in the flexible display device, and supports the flexible display panel to keep it flat.

[0026] The back panel 100 has a deformable portion 101, a first non-deformable portion 103, and a second non-deformable portion 107 located on both sides of the deformable portion 101. The deformable portion 101 is formed across the deformable interval B in the longitudinal direction X of the back panel 100, and is located between the spaced-apart first non-deformable portion 103 and second non-deformable portion 107. The deformable portion 101 can be folded and unfolded. The first non-deformable portion 103 is continuously connected to the deformable portion 101 in the longitudinal direction X and is formed across the first non-deformable interval C1. The first non-deformable portion 103 does not deform and maintains a flat, plate-like shape. The second non-deformable portion 107 is continuously connected to the deformable portion 101 in the longitudinal direction X and is formed across the second non-deformable interval C2. The second non-deformable portion 107 does not deform and maintains a flat, plate-like shape.

[0027] Figure 3 A cross-sectional view of the back panel 100 is shown. See also... Figure 3 The central layer 110 includes a glass plate 111 and a filler 119 that fills the pores formed in the glass plate 111.

[0028] Figure 4 A top view of glass plate 111 is shown. See also Figure 3 and Figure 4The glass plate 111 is a rectangular planar shape made of glass material corresponding to the shape of the back plate 100, including: a deformable structural part 112 formed across the deformable section B, a first non-deformable structural part 114 formed across the first non-deformable section C1, and a second non-deformable structural part 117 formed across the second non-deformable section C2. The deformable section B is... Figure 1 The interval corresponding to the interval E in which the curved portion is formed. In this embodiment, the thickness of the glass plate 111 is described as approximately 100 μm, but the present invention is not limited thereto. Moreover, in this embodiment, the length L of the approximately rectangular glass plate 111 is described as approximately 159.2 mm and the width W as approximately 66 mm, but the present invention is not limited thereto.

[0029] The deformable structure portion 112 is formed across the deformation interval B in the length direction X. The deformable structure portion 112 is located at the center of the glass plate 111 in the length direction X. In this embodiment, the deformation interval B in which the deformable structure portion 112 is formed is described as approximately 10% of the total length, but the present invention is not limited thereto. The deformable structure portion 112 forms a curved portion, enabling the back plate 100 to be folded and unfolded. The deformable structure portion 112 is formed as a mesh structure. By forming the deformable structure portion 112 as a mesh structure, foldable and unfoldable deformation can be achieved without changing the thickness. Through the mesh structure deformable structure portion 112, a plurality of through-holes 113 are formed in the deformable structure portion 112 extending along the thickness direction. The deformable structure portion 112, which can minimize the radius of curvature as much as possible when bent, is useful as a flexible display. In this embodiment, it is preferable that the porosity of the deformable structure portion 112 based on the plurality of through-holes 113 is 20% to 50%. When the porosity is below 20%, it is difficult to ensure the desired curvature, and when the porosity is above 50%, the possibility of damage to the deformable structural part 112 increases. Multiple through-holes 113 are filled with filler 119.

[0030] A first non-deformable structural portion 114 is formed across a first non-deformable interval C1 in the length direction X. The first non-deformable structural portion 114 is continuously connected to the deformable structural portion 112. The first non-deformable structural portion 114 is a generally flat plate-like shape that retains its original form without deformation. A plurality of first non-deformable structural portion holes 115 are formed in the first non-deformable structural portion 114. In this embodiment, it is preferable that the porosity of the first non-deformable structural portion 114 based on the plurality of first non-deformable structural portion holes 115 is 1.5% to 20%. If the porosity of the first non-deformable structural portion 114 is less than 1.5%, it is difficult to obtain the desired thermal performance; if the porosity is greater than 20%, the first non-deformable structural portion 114 may deform. The plurality of first non-deformable structural portion holes 115 are filled with a filler 119.

[0031] The second non-deformable structural portion 117 is formed across the second non-deformable interval C2 in the length direction X. The second non-deformable structural portion 117 is continuously connected to the deformable structural portion 112. The second non-deformable structural portion 117 is a generally flat plate-shaped portion that does not deform but maintains its original shape. A plurality of second non-deformable structural portion holes 118 are formed in the second non-deformable structural portion 117. In this embodiment, it is preferable that the porosity of the second non-deformable structural portion 117 based on the plurality of second non-deformable structural portion holes 118 is 1.5% to 20%. When the porosity of the second non-deformable structural portion 117 is less than 1.5%, it is difficult to obtain the desired thermal performance, and when the porosity is greater than 20%, the second non-deformable structural portion 117 may deform. The plurality of second non-deformable structural portion holes 118 are filled with filler 119.

[0032] The filler 119 fills multiple through-holes 113 formed in the deformable structural portion 112 of the glass plate 111, multiple first non-deformable structural portion holes 115 formed in the first non-deformable structural portion 114, and multiple second non-deformable structural portion holes 118 formed in the second non-deformable structural portion 117. The filler 119 is integrally formed with the first coating layer 120 and the second coating layer 130. The material of the filler 119 is the same as that of the first coating layer 120 and the second coating layer 130, and it is formed together with the first coating layer 120 and the second coating layer 130 during the formation of the two coating layers 120 and 130.

[0033] See Figure 2 and Figure 3 The first coating layer 120 covers the first surface 110a (the top surface in the figure) of both sides of the central layer 110. The first coating layer 120 is made of a carbon-based resin material, providing high elasticity / high thermal conductivity and excellent insulation properties. The first coating layer 120 is formed by applying a coating liquid to one side of the glass plate 111. The first coating layer 120 is integrally formed with the filler 119 of the central layer 110 and is made of the same material as the filler 119. In this embodiment, the thickness of the first coating layer 120 is described as 5 μm to 20 μm.

[0034] The second coating layer 130 covers the second surface 110b (bottom surface in the figure) of both sides of the central layer 110. The second coating layer 130 is made of the same material as the first coating layer 120. The second coating layer 130 is formed by applying a coating liquid to the other side of the glass plate 111. The second coating layer 130 is integrally formed with the filler 119 of the central layer 110 and is made of the same material as the filler 119. In this embodiment, the thickness of the second coating layer 130 is described as 5 μm to 20 μm.

[0035] Figure 5 A perspective view of a backplate according to another embodiment of the present invention is shown. See also Figure 5The back panel 200 is generally rectangular in shape and includes a central layer 210, a first coating layer 120 and a second coating layer 130 that cover both sides of the central layer 210.

[0036] The back panel 200 has a deformable portion 201, a first non-deformable portion 203, and a second non-deformable portion 207 located on either side of the deformable portion 201. The deformable portion 201 is formed across a deformable interval B in the longitudinal direction X of the back panel 200, and is located between the spaced-apart first non-deformable portions 203 and second non-deformable portions 207. The deformable portion 201 can be rolled up. The first non-deformable portion 203 is continuously connected to the deformable portion 201 in the longitudinal direction X and is formed across the first non-deformable interval C1. The first non-deformable portion 203 does not deform but maintains a flat, plate-like shape. The second non-deformable portion 207 is continuously connected to the deformable portion 201 in the longitudinal direction X and is formed across the second non-deformable interval C2. The second non-deformable portion 207 does not deform but maintains a flat, plate-like shape.

[0037] Although not illustrated, the central layer 210 has Figure 6 The glass plate 211 shown, and the filler (not shown) used to fill the pores 213 formed in the glass plate 211.

[0038] See Figure 6 The glass plate 211 is a rectangular planar shape made of glass material, corresponding to the shape of the back plate 200. It has a deformable structural portion 212 formed across the deformable interval B, a first non-deformable structural portion 214 formed across the first non-deformable interval C1, and a second non-deformable structural portion 217 formed across the second non-deformable interval C2. In this embodiment, the thickness of the glass plate 211 is described as approximately 100 μm, but the present invention is not limited thereto. Furthermore, in this embodiment, the length L of the approximately rectangular glass plate 211 is described as approximately 159.2 mm, and the width W is approximately 66 mm, but the present invention is not limited thereto.

[0039] The deformable structure portion 212 is formed across the deformable section B in the length direction X. The deformable structure portion 212 is located at the center of the glass plate 211 in the length direction X. In this embodiment, it is described that the deformable section B with the deformable structure portion 212 is used in a rollable form, so the deformable section B is about 80% or more of the total length L, but the present invention is not limited thereto. The deformable structure portion 212 forms a rollable portion so that the back plate 200 can be rolled up. The deformable structure portion 212 is formed as a mesh structure. By forming the deformable structure portion 212 as a mesh structure, it is possible to achieve deformation that can be rolled into a roll shape and unfolded. In the mesh structure deformable structure portion 212, a plurality of pores 213 are formed along the thickness direction. In this embodiment, it is preferable that the porosity of the deformable structure portion 212 based on the plurality of pores 213 is 20% to 50%. When the porosity is less than 20%, it is difficult to ensure a curvature suitable for rolling, and when the porosity is greater than 50%, the possibility of breakage of the deformable structure portion 212 increases. Multiple pores 213 are filled with a filler (not shown).

[0040] The first non-deformable structural portion 214 is formed across the first non-deformable interval C1 in the length direction X. The first non-deformable structural portion 214 is continuously connected to the deformable structural portion 212. The first non-deformable structural portion 214 is a generally flat plate-shaped portion that does not deform but maintains its original shape.

[0041] The second non-deformable structural portion 217 is formed across the second non-deformable interval C2 in the length direction X. The second non-deformable structural portion 217 is continuously connected to the deformable structural portion 212. The second non-deformable structural portion 217 is a generally flat plate-shaped portion that does not deform but maintains its original shape.

[0042] See Figure 5 The first coating layer 120 covers the first surface (the top surface in the figure) of both sides of the central layer 210. The first coating layer 120 and... Figure 2 The first coating layer 120 in the illustrated embodiment is the same.

[0043] The second coating layer 130 covers the second surface (bottom surface in the figure) of the central layer 210. The second coating layer 130 and... Figure 2 The second coating layer 130 in the illustrated embodiment is the same.

[0044] The glass sheet of the first coating layer 120 and the second coating layer 130 and the central layer 210 ( Figure 6The filler (not shown) filling the plurality of pores 213 formed in the deformable structural portion 212 of the glass plate 211 is integrally formed and is made of the same material as the filler (not shown). The first coating layer 120 and the second coating layer 130 are connected in the region of the deformable structural portion 212 of the glass plate 211 by the filler (not shown), and are completely separated in the region of the first non-deformable structural portion 214 and the second non-deformable structural portion 217.

[0045] Figure 7 A flowchart illustrating a method for manufacturing a backplate according to an embodiment of the present invention is shown. Figure 7 The method for manufacturing the backplate shown is used to manufacture through Figures 2 to 6 The back plate of the described structure is 100 and 200. See also... Figure 7 According to an embodiment of the present invention, a method for manufacturing a backplate includes: a raw plate preparation step S10 for preparing a glass raw plate required for manufacturing a backplate; a pattern forming step S20 for forming a pattern on the glass raw plate prepared by the raw plate preparation step S10; a cutting step S30 for separating a plurality of raw plate cut pieces from the glass raw plate formed by the pattern forming step S20; a thinning step S40 for reducing the thickness of the raw plate cut pieces separated by the cutting step S30; a strengthening step S50 for strengthening the raw plate cut pieces after the thickness has been reduced by the thinning step S40; a repair step S60 for repairing the raw plate cut pieces strengthened by the strengthening step S50; a coating step S70 for coating the raw plate cut pieces with a coating liquid; and a drying step S80 for drying the coating liquid.

[0046] In the original board preparation step S10, preparation is made to manufacture the back plate ( Figure 2 100) glass sheets ( Figure 4 The glass substrate required for step S10 (111) is prepared in a step where the glass substrate has a sufficiently large planar dimension to allow for the manufacture of multiple glass sheets from the glass substrate. Figure 4 (111). After preparing the glass substrate through the substrate preparation step S10, the pattern forming step S20 is performed.

[0047] In the pattern forming step S20, a pattern is formed on the glass substrate prepared in the substrate preparation step S10. Figure 8 This illustrates the state in which a pattern is formed on the glass substrate by performing the pattern forming step S20. See also... Figure 8 A pattern shown in dashed lines is formed on the glass substrate 10a. The pattern formed on the glass substrate 10a includes multiple unit patterns 101a. Each unit pattern 101a has a shape similar to that of the glass substrate (…). Figure 4 The size and shape corresponding to 111). Unit pattern 101a includes: corresponding to the size and shape of the glass plate ( Figure 4 The cutting pattern 12a corresponding to the edge of 111) and the glass plate ( Figure 4 The mesh pattern 13 corresponding to the mesh structure of the deformed structural part 112 of (111) and the mesh pattern corresponding to the glass plate ( Figure 4 The hole pattern 14 corresponds to the holes 115 and 118 of (111). In this embodiment, the pattern forming step S20 is performed as follows: after attaching a photosensitive film (DFR: Dry Film Photoresist) to both sides of the glass substrate 10a, the protective film corresponding to the pattern is removed from the photosensitive film, and the pattern is formed through exposure and development processes. After completing the pattern forming step S20, the cutting step S30 is performed.

[0048] In the cutting step S30, the glass substrate is cut according to the pattern formed in the pattern forming step S20 to separate multiple substrate cut pieces from the glass substrate 10a. See also Figure 8 The diagram illustrates the state of separating the original plate cut piece 111a from the original glass plate 10a by performing cutting step S30. In this embodiment, sand blasting is used to perform cutting step S30, but the invention is not limited to this; other cutting methods such as laser cutting can also be used, which also fall within the scope of this invention. After completing cutting step S30, a thinning step S40 is performed on the original plate cut piece 111a obtained by cutting step S30. The photosensitive film attached to the original plate cut piece 111a is removed before performing thinning step S40.

[0049] In the thinning step S40, the original plate cut piece separated by the cutting step S30 is... Figure 8 111a) is immersed in etching solution to reduce the size of the original plate cutting part by etching solution. Figure 8 The thickness of 111a) is reduced by the thinning step S40. Figure 8 After the thickness of 111a) is reached, the strengthening step S50 is performed.

[0050] In strengthening step S50, the original plate cut piece, whose thickness has been reduced in thinning step S40, is chemically strengthened. Strengthening step S50 uses conventional methods for strengthening glass, therefore detailed explanation is omitted. After strengthening step S50, repair step S60 is performed.

[0051] In repair step S60, the original plate cut part strengthened by strengthening step S50 is repaired. In repair step S60, the surface of the strengthened original plate cut part is ground. Repair step S60 uses a conventional method for grinding glass surfaces, so detailed explanation is omitted. After performing repair step S60, a coating step is performed.

[0052] In coating step S70, a coating liquid is applied to the cut part of the original plate. A backing plate is formed by applying the coating liquid in coating step S70. Figure 2 The first coating layer 120, the second coating layer 130, and the filler (of 100) Figure 3 (190). In this embodiment, the method for coating the coating liquid in coating step S70 can be plasma coating, 3D printing, rod (roller) coating, spin coating, spraying, or slot die coating. The coating liquid used in coating step S70 contains 5% to 25% carbon material, 0.5% to 3% polyvinyl alcohol (PVA), 1% to 3% graphene, 1% to 3% carbon nanotubes (CNTs), 25% to 35% water, and 30% to 40% alcohol. Carbon material, graphene, and carbon nanotubes improve thermal diffusion. PVA acts as a binder, reinforcing agent, and stabilizer. Water and alcohol act as solvents. After performing coating step S70, drying step S80 is performed.

[0053] In drying step S80, the coating liquid applied in coating step S70 is dried to form a backing plate. Figure 2 The first coating layer 120, the second coating layer 130, and the filler (of 100) Figure 3 (of 190).

[0054] The present invention has been illustrated above by means of embodiments, but the present invention is not limited thereto. Modifications or changes can be made to the embodiments without departing from the spirit and scope of the present invention, and those skilled in the art will understand that such modifications and changes also belong to the present invention.

Claims

1. A backplate for supporting a flexible display panel, comprising: Glass sheets, which are porous; Two coating layers, which respectively cover both sides of the glass plate; as well as A filler that fills the pores and is connected to the two coating layers. The glass sheet includes: Two non-deformable structural parts are arranged separately from each other; as well as A deformable structural part is located between and connects the two non-deformable structural parts. The deformable structure is formed by spanning the deformation range in the length direction. The deformable structure is formed into a mesh by through openings that extend along the thickness direction of the deformable structure and form the pores.

2. The back plate for supporting a flexible display panel according to claim 1, wherein: The porosity of the deformable structure based on the plurality of through-holes is 20% to 50%.

3. The back plate for supporting a flexible display panel according to claim 1, wherein: The filler material is the same as the coating material. The two coating layers are integrated with the filler.

4. The back plate for supporting a flexible display panel according to claim 1, wherein: Multiple non-deformable structural holes are formed in the two non-deformable structural parts, which extend along the thickness direction and form the pores.

5. The back plate for supporting a flexible display panel according to claim 4, wherein: The porosity of the non-deformable structural portion based on the plurality of non-deformable structural portion holes is 1.5% to 20%.

6. The back plate for supporting a flexible display panel according to claim 4, wherein: The filler material is the same as the coating material. The two coating layers are integrated with the filler.

7. The back plate for supporting a flexible display panel according to claim 1, wherein: The thickness of the coating layer is 5μm to 20μm.

8. The back plate for supporting a flexible display panel according to claim 1, wherein: The coating layer is a carbon-based resin material.

9. A method for manufacturing a backplate for supporting a flexible display panel, comprising: Pattern formation steps for forming patterns on a glass substrate; The cutting step of separating the original glass plate from the original glass plate by cutting the original glass plate according to the pattern; as well as The coating step involves applying a coating liquid to both sides of the original plate cut part. In the pattern forming step, a mesh pattern is formed across a predetermined interval spanning the center of the longitudinal direction of the original plate cutter. In the cutting step, the original plate is separated such that the mesh pattern remains at the center of the length direction of the cut piece. In the coating step, the coating liquid fills the pores of the mesh pattern.

10. The method for manufacturing a backplate for supporting a flexible display panel according to claim 9, wherein: In the pattern forming step, patterns corresponding to multiple holes are simultaneously formed in the regions on both sides of the mesh pattern. In the coating step, the coating liquid fills the pores.

11. The method for manufacturing a backplate for supporting a flexible display panel according to claim 9, wherein: The coating liquid contains carbon materials, resin materials, and water.

12. The method for manufacturing a backplate for supporting a flexible display panel according to claim 11, wherein: The coating liquid also contains graphene.

13. The method for manufacturing a backplate for supporting a flexible display panel according to claim 11, wherein: The coating liquid also contains carbon nanotubes.

14. The method for manufacturing a backplate for supporting a flexible display panel according to claim 9, wherein: Prior to performing the coating step, a thinning step is also included to reduce the thickness of the original plate cut piece.

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