Display device and method of manufacturing same

Abstract

The invention relates to a display device and a method of manufacturing the same. The display device includes a display module having a fixed area and an extended area extending from the fixed area in a first direction. The first support plate includes a first flat portion disposed below the fixed region and a flexible portion disposed below the expanded region. The second support plate includes a plurality of support bars arranged under the flexible portion, arranged in the first direction, and extending in a second direction intersecting the first direction. The flexible portion includes a first carbon fiber. The support rod includes a second carbon fiber. A dimension of a radius of the first carbon fiber and a dimension of a radius of the second carbon fiber are different from each other.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the priority of Korean Patent Application No. 10-2023-0114963 filed on August 30, 2023, in the Korean Intellectual Property Office, and Korean Patent Application No. 10-2023-0138979 filed on October 17, 2023, in the Korean Intellectual Property Office, the disclosures of which are incorporated herein by reference in their entirety. Technical Field

[0003] The present disclosure described herein relates to a display device, and more particularly, to a flexible display device and a method of manufacturing the flexible display device. Background Art

[0004] Generally, electronic devices such as smart phones, digital cameras, laptop computers, navigation devices, and smart TVs that provide images to users include display devices for displaying images. These display devices generate images and provide the generated images to users through display screens.

[0005] In recent years, with the development of display device technology, various types of display devices have been developed. For example, a flexible display device that can be expanded outward by sliding or rolling has been developed. A flexible display device whose shape can be variously deformed can be more easily carried and increase user convenience.

[0006] These display devices may include a display panel, a support plate disposed under the display panel, and a support rod. Summary of the invention

[0007] The display device includes a display module, and the display module includes a fixed area and an extended area extending from the fixed area in a first direction. The first support plate includes a first flat portion arranged under the fixed area and a flexible portion arranged under the extended area. The second support plate includes a plurality of support rods arranged under the flexible portion, arranged in the first direction, and extending in a second direction intersecting the first direction. The flexible portion includes a first carbon fiber, each of the support rods includes a second carbon fiber, and the size of the radius of the first carbon fiber and the size of the radius of the second carbon fiber are different from each other.

[0008] The method for manufacturing a display device includes forming a preliminary first support plate by laminating a plurality of first carbon fibers. Forming a preliminary second support plate by laminating a plurality of second carbon fibers. Adhering the preliminary first support plate to the upper surface of the preliminary second support plate. Forming a plurality of support rods by etching the preliminary second support plate. Forming a flexible portion by defining a plurality of flexible openings in the preliminary first support plate. Connecting the flexible portion and the support rods to a display panel. The size of the radius of the first carbon fiber is smaller than the size of the radius of the second carbon fiber. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The above and other objects and features of the present disclosure will become apparent by describing in detail embodiments of the present disclosure with reference to the attached drawings.

[0010] Figure 1 is a perspective view of a display device according to an embodiment of the present disclosure.

[0011] Figure 2 It is shown Figure 1 A perspective view of a folded state of the display device shown in FIG.

[0012] Figure 3 It is shown Figure 1 A perspective view of an expanded mode of the display device shown in FIG.

[0013] Figure 4 yes Figures 1 to 3 An exploded perspective view of the display device shown in FIG.

[0014] Figure 5A and Figure 5B It is shown Figure 4 Cross-sectional views of the module group shown in the collapsed mode and the expanded mode.

[0015] Figure 6 yes Figure 4 An exploded perspective view of the module group shown in FIG.

[0016] Figure 7 It is shown Figure 6 A cross-sectional view of a display module is shown in FIG.

[0017] Figure 8 It is shown Figure 7 A cross-sectional view of a display panel shown in FIG.

[0018] Fig. 9 yes Figure 8 A plan view of the display panel is shown in FIG.

[0019] Fig.10 yes Figure 6 An enlarged perspective view of the first area AA1 is shown in FIG.

[0020] Fig.11 yes Fig.10 An enlarged plan view of the second area AA2 is shown in FIG.

[0021] Fig.12 yes Fig.10 A perspective view of the third area AA3 shown in FIG.

[0022] Fig.13 yes Figure 4 A perspective view of the second support plate shown in FIG.

[0023] Fig.14 yes Fig.13 A perspective view of the fourth area AA4 shown in FIG.

[0024] Fig.15 It is shown Fig.12 The flexible part and Fig.13 A cross-sectional view of the connection between the support rods.

[0025] Fig.16A It is shown Fig.13 A perspective view of the second flat portion shown in FIG.

[0026] Fig. 16B is a perspective view showing a second planar portion according to an embodiment.

[0027] Fig.17A is a perspective view showing a second support plate according to an embodiment, and Fig. 17B is a cross-sectional view showing a second support plate according to an embodiment.

[0028] 18A to 18E is a perspective view showing a method of manufacturing a flexible portion and a support rod. DETAILED DESCRIPTION

[0029] In this specification, the expression that a first component (or a first region, a first layer, a first part, a first portion, etc.) is "disposed on", "connected to" or "coupled to" a second component may mean that the first component is directly disposed on / directly connected to / directly coupled to the second component, or may mean that a third component is interposed therebetween.

[0030] Throughout the specification and drawings, the same reference numerals may refer to the same components. In addition, although each of the drawings may represent one or more specific embodiments of the present disclosure drawn to scale, so that relative lengths, relative thicknesses, and relative angles can be inferred therefrom, it should be understood that the present invention is not necessarily limited to the relative lengths, relative thicknesses, and relative angles shown. These values ​​can be changed within the spirit and scope of the present disclosure, for example, to allow for manufacturing limitations, etc.

[0031] The term "and / or" includes all combinations of one or more components that can be defined by the relevant configurations.

[0032] The terms "first", "second", etc. are used to describe various components, but these components are not necessarily limited by these terms. These terms are used to distinguish one component from another component. For example, without departing from the scope of the present disclosure, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. Singular expressions include plural expressions unless otherwise clearly indicated in the context.

[0033] In addition, the terms “under,” “below,” “on,” “above,” etc. are used to describe the relationship between components shown in the drawings. These terms have relative concepts and are described with reference to directions indicated in the drawings.

[0034] It will be understood that the terms “includes,” “comprising,” “having,” etc. specify the presence of the features, quantities, steps, operations, elements or components, or a combination thereof, described in the specification, but do not exclude the possibility of the presence or addition of one or more other features, quantities, steps, operations, elements or components, or a combination thereof.

[0035] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0036] Figure 1 is a perspective view of a display device according to an embodiment of the present disclosure. Figure 2 It is shown Figure 1 A diagram showing a folded state of the display device shown in . Figure 3 Shows Figure 1 The extended mode of the display device shown in . Figure 4 yes Figures 1 to 3 An exploded perspective view of the display device shown in FIG.

[0037] refer to Figure 1 and Figure 2 , the display device DD may have a rectangular shape having a pair of short sides extending in a first direction DR1 and a pair of long sides extending in a second direction DR2 intersecting the first direction DR1. However, the present disclosure is not necessarily limited thereto, and the display device DD may have various shapes such as a circular shape and a polygonal shape. The display device DD may be a flexible display device.

[0038] Hereinafter, a direction intersecting the first direction DR1 is defined as a second direction DR2. A direction intersecting substantially perpendicularly with a plane defined by the first direction DR1 and the second direction DR2 is defined as a third direction DR3. In this specification, the expression "when viewed on a plane" or "in a plan view" (which may be used interchangeably herein) may mean a state of being viewed from the third direction DR3.

[0039] The display device DD may include a folding area FA and a plurality of non-folding areas NFA1 and NFA2. The non-folding areas NFA1 and NFA2 may include a first non-folding area NFA1 and a second non-folding area NFA2. The folding area FA may be disposed between the first non-folding area NFA1 and the second non-folding area NFA2. The first non-folding area NFA1, the folding area FA, and the second non-folding area NFA2 may be arranged in a first direction DR1.

[0040] For example, one folding area FA and two non-folding areas NFA1 and NFA2 are shown, but the number of folding areas FA and non-folding areas NFA1 and NFA2 is not necessarily limited thereto. For example, the display device DD may include a plurality of non-folding areas greater than two and a plurality of folding areas arranged between the non-folding areas.

[0041] An upper surface of the display device DD may be defined as a display surface DS, and the display surface DS may have a plane defined by the first direction DR1 and the second direction DR2. An image IM generated by the display device DD may be provided to a user through the display surface DS.

[0042] The display surface DS may include a display area DA and a non-display area NDA that is adjacent to and at least partially surrounds the display area DA. The display area DA displays an image, and the non-display area NDA does not display an image. The non-display area NDA may surround the display area DA on multiple sides of the display area DA and define an edge of the display device DD printed in a predetermined color.

[0043] refer to Figure 2 , the display device DD may be a display device in a folded or unfolded state. For example, the folding area FA may be bent around a folding axis FX parallel to the second direction DR2, and thus the display device DD may be folded. The folding axis FX may be defined as a long axis parallel to a long side of the display device DD.

[0044] When the display device DD is folded, the first non-folding area NFA1 and the second non-folding area NFA2 may face each other, and the display device DD may be folded inwardly so that the display surface DS is not exposed to the outside and is thus protected. However, embodiments of the present disclosure are not necessarily limited thereto.

[0045] refer to Figure 1 , Figure 3 and Figure 4 , the display device DD may include a module set MST and a case CS. The case CS may accommodate the module set MST. Two sides of the case CS facing each other in the first direction DR1 may have a curved shape.

[0046] The case CS may include a first case CS1 and a second case CS2. The second case CS2 may move in a direction away from or close to the first case CS1 in a first direction DR1.

[0047] The module group MST can be accommodated in the shell CS to display the image IM. One of the two sides of the module group MST that are opposite to each other in the first direction DR1 can be accommodated in the first shell CS1. The other side of the module group MST can be accommodated in the second shell CS2. Therefore, when the second shell CS2 moves from the first shell CS1 in the first direction DR1, the module group MST can also move in the first direction DR1. When the second shell CS2 moves in the first direction DR1, the area of ​​the exposed surface of the module group MST can be adjusted according to the movement of the second shell CS2. The contraction mode and expansion mode of the display device DD can be realized according to the movement of the second shell CS2.

[0048] Figure 5A and Figure 5B It is shown Figure 4 Cross-sectional views of the module group shown in the collapsed mode and the expanded mode.

[0049] refer to Figure 3 , Figure 4 , Figure 5A and Figure 5B , the module group MST may include a display module DM, a first support plate MTP1 and a second support plate MTP2. The display module DM may be a flexible display module. The display module DM may include a fixed area DFP and an extended area DEP. When the display device DD is in a contracted mode, a portion of the display module DM flatly exposed to the outside may be defined as a fixed area DFP, and a portion of the display module DM not flatly exposed to the outside may be defined as an extended area DEP.

[0050] When the display module DM is in the contraction mode or the expansion mode, a portion of the expansion region DEP may be flatly exposed to the outside. The expansion region DEP may extend from the fixed region DFP in the first direction DR1. Figure 5B As shown in FIG. 1 , in the extended mode, the fixed area DFP and the extended area DEP may be arranged in the first direction DR1. When the display device DD is in the contracted mode, as shown in FIG. Figure 5A As shown in , the extended area DEP may be disposed below the fixed area DFP.

[0051] The fixed area DFP may include a first non-folding area NFA1, a folding area FA, and a second non-folding area NFA2 arranged in a first direction DR1. The first non-folding area NFA1, the folding area FA, and the second non-folding area NFA2 may be substantially similar to the corresponding elements described above, and in the absence of a detailed description of an element with respect to the accompanying drawings, it can be understood that the element is at least similar to the corresponding element already described elsewhere within the present disclosure.

[0052] The display module DM may be supported by a first support plate MTP1 and a second support plate MTP2 disposed below the display module DM. The first support plate MTP1 may be disposed between the display module DM and the second support plate MTP2. The second support plate MTP2 may be disposed below the first support plate MTP1 and coupled to the first support plate MTP1. The coupling relationship between the first support plate MTP1 and the second support plate MTP2 will be 18A to 18E Described in detail in.

[0053] Figure 6 yes Figure 4 An exploded perspective view of the module group shown in FIG.

[0054] For example, Figure 6 is shown when the display device DD (see Figure 3 ) Diagram of the module group MST when it is in extended mode.

[0055] refer to Figure 6 When the display module DM is unfolded, the display module DM may have a rectangular shape having a pair of short sides extending in the first direction DR1 and a pair of long sides extending in the second direction DR2.

[0056] The first support plate MTP1 may be disposed under the display module DM. An upper surface of the first support plate MTP1 may be attached to a lower surface of the display module DM.

[0057] The first supporting plate MTP1 may include a first fixing portion LF1 and a first extension portion LE1. The first fixing portion LF1 may overlap the fixing region DFP of the display module DM. The first extension portion LE1 may overlap the extension region DEP. The first extension portion LE1 may extend from the first fixing portion LF1.

[0058] The first fixed part LF1 may include a first plane PLT1, a first folding part PLF1, and a second plane PLT2. The first plane PLT1, the first folding part PLF1, and the second plane PLT2 may be arranged in a first direction DR1. The first plane PLT1 may extend from the first folding part PLF1 in the first direction DR1. The second plane PLT2 may extend from the first folding part PLF1. The first plane PLT1, the first folding part PLF1, and the second plane PLT2 may be formed integrally, for example, they may be together as part of a single uninterrupted structure. The first folding part PLF1 may be disposed between the first plane PLT1 and the second plane PLT2.

[0059] The first plane PLT1 may overlap the first non-folding area NFA1. The first folding portion PLF1 may overlap the folding area FA. The second plane PLT2 may overlap the second non-folding area NFA2.

[0060] A plurality of first openings OP1 may be defined in the first folded portion PLF1. The first openings OP1 may be Fig.10 Described in detail in.

[0061] The second support plate MTP2 may include a second fixing portion LF2 and a second extension portion LE2. The second fixing portion LF2 may overlap the first fixing portion LF1 and the fixing area DFP. The second extension portion LE2 may overlap the first extension portion LE1 and the extension area DEP. The second extension portion LE2 may include a plurality of support bars MSB.

[0062] The second fixed part LF2 may include a third plane PLT3, a second folding part PLF2, and a fourth plane PLT4. The third plane PLT3, the second folding part PLF2, and the fourth plane PLT4 may be arranged in the first direction DR1. The third plane PLT3 may extend from the second folding part PLF2 in the first direction DR1. The fourth plane PLT4 may extend from the second folding part PLF2. The second folding part PLF2 may be disposed between the third plane PLT3 and the fourth plane PLT4. The third plane PLT3, the second folding part PLF2, and the fourth plane PLT4 may be formed integrally, for example, they may be together as part of a single uninterrupted structure.

[0063] The third plane PLT3 may overlap the first plane PLT1 and the first non-folding area NFA1. The second folding portion PLF2 may overlap the first folding portion PLF1 and the folding area FA. The fourth plane PLT4 may overlap the second non-folding area NFA2 and the second plane PLT2.

[0064] The third plane PLT3, the second folded portion PLF2, and the fourth plane PLT4 may be planes defined by the first direction DR1 and the second direction DR2. A plurality of second openings OP2 may be defined in the second folded portion PLF2. The second openings OP2 may be formed at Fig.13 Described in detail in.

[0065] Figure 7 It is an example showing Figure 6 A cross-sectional view of a display module is shown in FIG.

[0066] refer to Figure 7 , the display module DM may include a display panel DP, an input sensing unit ISP, an anti-reflection layer RPL, a window WIN, a panel protection film PPF, and first to third adhesive layers AL1 to AL3.

[0067] The display panel DP may be a flexible display panel. According to an embodiment of the present disclosure, the display panel DP may be a light-emitting display panel, but the present disclosure is not necessarily particularly limited thereto. For example, the display panel DP may be an organic light-emitting display (OLED) panel or an inorganic light-emitting display panel. The light-emitting layer of the organic light-emitting display panel may include an organic light-emitting material. The light-emitting layer of the inorganic light-emitting display panel may include quantum dots and quantum rods. Hereinafter, the display panel DP will be described as an organic light-emitting display panel.

[0068] The input sensing unit ISP may be provided on the display panel DP. The input sensing unit ISP may include a plurality of sensing units for sensing external input in a capacitive manner. When manufacturing the display device DD, the input sensing unit ISP may be directly manufactured on the display panel DP. However, the present disclosure is not necessarily limited thereto, and the input sensing unit ISP may be manufactured as a panel separated from the display panel DP and then attached to the display panel DP by an adhesive layer.

[0069] The anti-reflection layer RPL may be disposed on the input sensing unit ISP. The anti-reflection layer RPL may be defined as an anti-external light reflection film. The anti-reflection layer RPL may reduce the reflection of the external light from the display device DD (see Figure 1 )'s upper side toward the reflectivity of external light input into the display panel DP.

[0070] When external light moving toward the display panel DP is reflected by the display panel DP and provided back to the user (ie, the observer), the display may have a mirror-like effect visually recognized by the user. To prevent this phenomenon, for example, the anti-reflection layer RPL may include a plurality of color filters displaying the same color as the color of the pixels of the display panel DP.

[0071] The color filter may filter the external light into the same color as the color of the pixel. In this case, the external light will not be visually recognized by the user. However, the present disclosure is not necessarily limited thereto, and the anti-reflection layer RPL may include a phase retarder and / or a polarizer to reduce the reflectivity of the external light.

[0072] The window WIN may be disposed on the anti-reflection layer RPL. The window WIN may protect the display panel DP, the input sensing unit ISP, and the anti-reflection layer RPL from external scratches and impacts.

[0073] The panel protection film PPF may be disposed under the display panel DP. The panel protection film PPF may protect a lower portion of the display panel DP. The panel protection film PPF may include a flexible plastic material such as polyethylene terephthalate (PET).

[0074] The first adhesive layer AL1 may be disposed between the display panel DP and the panel protection film PPF, and the display panel DP and the panel protection film PPF may be adhered to each other by the first adhesive layer AL1. The second adhesive layer AL2 may be disposed between the anti-reflection layer RPL and the input sensing unit ISP, and the anti-reflection layer RPL and the input sensing unit ISP may be adhered to each other by the second adhesive layer AL2. The third adhesive layer AL3 may be disposed between the window WIN and the anti-reflection layer RPL, and the window WIN and the anti-reflection layer RPL may be adhered to each other by the third adhesive layer AL3.

[0075] Figure 8 It is shown Figure 7 A cross-sectional view of a display panel shown in FIG.

[0076] For example, Figure 8 is a cross-sectional view of the display panel DP when viewed from the second direction DR2.

[0077] refer to Figure 8 The display panel DP may include a substrate SUB, a circuit element layer DP-CL disposed on the substrate SUB, a display element layer DP-OLED disposed on the circuit element layer DP-CL, and a thin film encapsulation layer TFE disposed on the display element layer DP-OLED.

[0078] The substrate SUB may include a display area DA and a non-display area NDA adjacent to and at least partially surrounding the display area DA. The substrate SUB may include a flexible plastic material such as polyimide (PI). The display element layer DP-OLED may be disposed on the display area DA.

[0079] A plurality of pixels may be arranged in the circuit element layer DP-CL and the display element layer DP-OLED. Each of the pixels may include a transistor arranged on the circuit element layer DP-CL and a light emitting element disposed on the display element layer DP-OLED and connected to the transistor.

[0080] The thin film encapsulation layer TFE may be disposed on the circuit element layer DP-CL to cover the display element layer DP-OLED. The thin film encapsulation layer TFE may protect the pixels from moisture, oxygen, and foreign matter.

[0081] Fig. 9 yes Figure 8 A plan view of the display panel is shown in FIG.

[0082] refer to Fig. 9 , the display panel DP may include a scan driver SDV, a data driver DDV, a light emission driver EDV, and a plurality of pads PD.

[0083] The display panel DP may have a rectangular shape having a pair of long sides extending in the second direction DR2 and a pair of short sides extending in the first direction DR1, but the shape of the display panel DP is not necessarily limited thereto. The display panel DP may include a display area DA and a non-display area NDA adjacent to and at least partially surrounding the display area DA.

[0084] The display panel DP may include a plurality of pixels PX, a plurality of scan lines SL1 to SLm, a plurality of data lines DL1 to DLn, a plurality of emission lines EL1 to ELm, first and second control lines CSL1 and CSL2, a power line PL, a plurality of connection lines CNL, and a plurality of pads PD. Here, "m" and "n" are positive integers.

[0085] The pixels PX may be arranged in the display area DA. The scanning driver SDV and the light emission driver EDV may be arranged in the non-display area NDA adjacent to the long side of the display panel DP. The data driver DDV may be disposed in the non-display area NDA adjacent to one of the short sides of the display panel DP. When viewed on a plane, the data driver DDV may be adjacent to the lower end of the display panel DP.

[0086] The scan lines SL1 to SLm may extend in the first direction DR1 and may be connected to the pixels PX and the scan driver SDV. The data lines DL1 to DLn may extend in the second direction DR2 and may be connected to the pixels PX and the data driver DDV. The emission lines EL1 to ELm may extend in the first direction DR1 and may be connected to the pixels PX and the light emission driver EDV.

[0087] The power line PL may extend in the second direction DR2 and may be disposed in the non-display area NDA. The power line PL may be disposed between the display area DA and the light emission driver EDV, but the present disclosure is not necessarily limited thereto and the power line PL may also be disposed between the display area DA and the scan driver SDV.

[0088] The connection line CNL may extend in the first direction DR1, may be arranged in the second direction DR2, and may be connected to the power line PL and the pixel PX. A driving voltage may be applied to the pixel PX through the power line PL and the connection line CNL connected to each other.

[0089] The first control line CSL1 may be connected to the scan driver SDV and extend toward the lower end of the display panel DP. The second control line CSL2 may be connected to the light emission driver EDV and extend toward the lower end of the display panel DP. The data driver DDV may be disposed between the first control line CSL1 and the second control line CSL2.

[0090] The data lines DL1 to DLn may be connected to corresponding pads PD through a data driver DDV. For example, the data lines DL1 to DLn may be connected to the data driver DDV, and the data driver DDV may be connected to the pads PD respectively corresponding to the data lines DL1 to DLn.

[0091] The data lines DL1 to DLn may be connected to a data driver DDV, and the data driver DDV may be connected to pads PD corresponding to the data lines DL1 to DLn.

[0092] A printed circuit board may be connected to the pad PD, and a timing controller and a voltage generator may be arranged on the printed circuit board. The timing controller may be manufactured as an integrated circuit chip and mounted on the printed circuit board. The timing controller and the voltage generator may be connected to the pad PD through the printed circuit board.

[0093] A scan control signal may be provided to a scan driver SDV through a first control line CSL1. A light emission control signal may be provided to a light emission driver EDV through a second control line CSL2. A data control signal may be provided to a data driver DDV. The timing controller may receive an image signal from an external unit, convert a data format of the image signal to meet an interface specification with the data driver DDV, and provide the converted image signal to the data driver DDV.

[0094] The scan driver SDV may generate a plurality of scan signals in response to the scan control signal. The scan signals may be applied to the pixels PX through the scan lines SL1 to SLm. The scan signals may be sequentially applied to the pixels PX.

[0095] The data driver DDV may generate a plurality of data voltages corresponding to the image signal in response to the data control signal. The data voltages may be applied to the pixels PX through the data lines DL1 to DLn. The light emission driver EDV may generate a plurality of light emission signals in response to the light emission control signal. The light emission signals may be applied to the pixels PX through the light emission lines EL1 to ELm.

[0096] The pixel PX may receive a data voltage in response to the scan signal. The pixel PX may display an image by emitting light having brightness corresponding to the data voltage in response to the light emission signal. The light emission time of the pixel PX may be controlled by the light emission signal.

[0097] Fig.10 yes Figure 6 An enlarged perspective view of the first area AA1 is shown in FIG. Fig.11 yes Fig.10 An enlarged plan view of the second area AA2 is shown in FIG. Fig.12 yes Fig.10 A perspective view of the third area AA3 shown in FIG.

[0098] refer to Fig.10 , the first support plate MTP1 may include a first fixing portion LF1 and a first extension portion LE1. The first extension portion LE1 may extend from the first fixing portion LF1 in a first direction DR1. The first fixing portion LF1 and the first extension portion LE1 may be arranged in the first direction DR1. Hereinafter, the first fixing portion LF1 may be defined as a first flat portion PLA1, and the first extension portion LE1 may be defined as a flexible portion EFP.

[0099] The first planar portion PLA1 may have a plate shape defined by a first direction DR1 and a second direction DR2. The first planar portion PLA1 may include a first plane PLT1, a first folded portion PLF1, and a second plane PLT2. The first plane PLT1, the first folded portion PLF1, and the second plane PLT2 may be arranged in the first direction DR1.

[0100] The first openings OP1 may be defined in the first folding portion PLF1. The first openings OP1 may be arranged in a predetermined regularity. The first openings OP1 may be arranged in a grid shape, and a grid pattern may be formed in the first folding portion PLF1.

[0101] Since the first opening OP1 is defined in the first folding portion PLF1, the area of ​​the first folding portion PLF1 is reduced, and thus the rigidity of the first folding portion PLF1 may be reduced. Therefore, when the first opening OP1 is defined in the first folding portion PLF1, the flexibility of the first folding portion PLF1 may be increased compared to a case where the first opening OP1 is not defined in the first folding portion PLF1. As a result, the first folding portion PLF1 may be more easily folded.

[0102] refer to Fig.10 , Fig.11 and Fig.12 , the flexible portion EFP may include a plurality of first portions PT1 and a plurality of second portions PT2. The first portions PT1 may extend in the second direction DR2. The second portions PT2 may extend in the second direction DR2.

[0103] The first portion PT1 and the second portion PT2 may be alternately arranged in the first direction DR1. The second portion PT2 may be arranged between the first portions PT1 adjacent to each other. A flexible opening LOP to be described below may be defined in the second portion PT2. The flexible opening LOP may not be defined in the first portion PT1.

[0104] The first support plate MTP1 may include a plurality of first carbon fibers CFB1. For example, Fig.12 The first carbon fibers CFB1 of the flexible portion EFP are illustrated, but the present disclosure is not necessarily limited thereto, and the first flat portion PLA1 may also include the first carbon fibers CFB1.

[0105] The first carbon fiber CFB1 may include carbon fiber reinforced plastic (CFRP). For example, the first carbon fiber CFB1 may be prepreg. Since the first support plate MTP1 includes CFRP, the weight of the first support plate MTP1 may be less than that of a plate including stainless steel (SUS).

[0106] like Fig.12 As shown in FIG. 1 , the first carbon fiber CFB1 may be laminated into a plurality of layers in the third direction DR3. Fig.12 , the first carbon fiber CFB1 may be laminated into first to fourth layers LY1 to LY4 in order from bottom to top. However, this is an example, and the number of laminated layers of the first carbon fiber CFB1 is not necessarily limited thereto.

[0107] In the layers in which the first carbon fibers CFB1 are laminated, the extending direction and the arrangement direction of the first carbon fibers CFB1 in at least one layer may be different from the extending direction and the arrangement direction of the first carbon fibers CFB1 in other layers. Fig.12As shown in FIG. 1 , the first carbon fibers CFB1 of the first layer LY1 may be arranged in the first direction DR1 and extend in the second direction DR2. The first carbon fibers CFB1 in the second layer LY2 and the third layer LY3 may extend in the first direction DR1 and be arranged in the second direction DR2. The first carbon fibers CFB1 disposed in the fourth layer LY4 may be arranged in the first direction DR1 and extend in the second direction DR2.

[0108] However, this is an example, and Fig.12 It is shown that the extending directions of the first carbon fibers CFB1 arranged in different layers are perpendicular to each other, but the extending direction and the arrangement direction of the first carbon fibers CFB1 may be different according to the display device DD (see Figure 1 )'s folding or sliding characteristics.

[0109] In the layer in which the first carbon fibers CFB1 are laminated, the first carbon fibers CFB1 arranged in at least one layer are arranged in different directions, and thus the rigidity and elasticity of the flexible portion EFP can be increased. For example, the flexible portion EFP including the first carbon fibers CFB1 arranged in different directions can have a greater rigidity than the flexible portion EFP including the first carbon fibers CFB1 arranged in the same direction. Therefore, when the display device DD (see Figure 1 ) When the second portion PT2 of the flexible portion EFP changes from the contracted mode to the extended mode, the second portion PT2 of the flexible portion EFP can maintain rigidity and elasticity. Figure 1 )’s folding or sliding reliability.

[0110] A plurality of flexible openings LOP may be defined in the second portion PT2. The flexible openings LOP may not be defined in the first portion PT1. The flexible openings LOP may be defined by first carbon fibers CFB1 arranged in the second portion PT2.

[0111] When viewed on a plane, the flexible openings LOP may be arranged in a first direction DR1 and a second direction DR2. The flexible openings LOP may extend longer in the second direction DR2 than in the first direction DR1. The flexible openings LOP arranged in the hth column may be arranged alternately with the flexible openings LOP arranged in the (h+1)th column. The column may correspond to the second direction DR2. Here, h is a positive integer.

[0112] The second portion PT2 may include a first branch portion BR1 and a second branch portion BR2. The first branch portion BR1 may be arranged between the flexible openings LOP adjacent to each other in the first direction DR1. The second branch portion BR2 may be arranged between the flexible openings LOP adjacent to each other in the second direction DR2. The first branch portion BR1 may extend in the second direction DR2, and the second branch portion BR2 may extend in the first direction DR1. The flexible opening LOP may be defined by the first branch portion BR1 and the second branch portion BR2.

[0113] Since the flexible opening LOP is defined, the rigidity of the flexible portion EFP may be reduced. Therefore, when the flexible opening LOP is defined in the first support plate MTP1, the flexibility of the first support plate MTP1 may be increased compared to a case where the flexible opening LOP is not defined in the first support plate MTP1. As a result, the first support plate MTP1 may be more easily bent. Figure 4 As shown in FIG, a portion of the flexible portion EFP can be more easily bent and accommodated inside the second case CS2.

[0114] Fig.13 yes Figure 4 A perspective view of the second support plate shown in FIG. Fig.14 yes Fig.13 A perspective view of the fourth area AA4 shown in FIG. Fig.15 Is used to describe Fig.12 The flexible part and Fig.13 A cross-sectional view of the connection between the support rods.

[0115] For example, Fig.15 It is along Figure 4 A cross-sectional view taken along line II' shown in FIG.

[0116] For ease of description, Fig.15 In, omitted Figure 4 The display module DM shown in FIG.

[0117] because Fig.15 The flexible part EFP shown in Fig.12 The flexible portion EFP shown in the drawing is the same, so its description can be basically similar to the corresponding elements described above, and without describing the elements in detail with respect to this figure, it can be understood that the elements are at least similar to the corresponding elements already described elsewhere in the present disclosure.

[0118] refer to Fig.13, the second support plate MTP2 may include a second fixing portion LF2 and a second extension portion LE2. The second fixing portion LF2 and the second extension portion LE2 may be arranged in the first direction DR1. When the second fixing portion LF2 is unfolded, the second fixing portion LF2 may have a flat plate shape defined by the first direction DR1 and the second direction DR2. Hereinafter, the second fixing portion LF2 may be defined as a second flat portion PLA2.

[0119] The second planar portion PLA2 may include a third plane PLT3, a second folded portion PLF2, and a fourth plane PLT4. The third plane PLT3, the second folded portion PLF2, and the fourth plane PLT4 may be arranged in the first direction DR1.

[0120] Since the second opening OP2 is defined in the second folding portion PLF2, the area of ​​the second folding portion PLF2 is reduced, and thus the rigidity of the second folding portion PLF2 can be reduced. Therefore, when the second opening OP2 is defined in the second folding portion PLF2, the flexibility of the second folding portion PLF2 can be increased compared to a case where the second opening OP2 is not defined in the second folding portion PLF2. As a result, the second folding portion PLF2 can be folded more easily.

[0121] The second extension portion LE2 may include a plurality of support bars MSB. The support bars MSB and the second flat portion PLA2 may be arranged in the first direction DR1. The support bars MSB may extend in the second direction DR2 and be arranged in the first direction DR1.

[0122] refer to Fig.13 and Fig.14 , the support bar MSB may include a plurality of second carbon fibers CFB2. The second carbon fibers CFB2 may include CFRP. Since the support bar MSB includes CFRP, the weight of the second support plate MTP2 may be less than that of a plate including stainless steel (SUS).

[0123] like Fig.14 As shown in , the second carbon fiber CFB2 can be laminated into multiple layers. Fig.14 , the second carbon fiber CFB2 is laminated into nine layers in the third direction DR3, but the number of laminated layers of the second carbon fiber CFB2 may not necessarily be limited thereto.

[0124] The second carbon fibers CFB2 disposed in each layer may be arranged in the first direction DR1. The second carbon fibers CFB2 disposed in each layer may extend in the second direction DR2. The extending direction and the arrangement direction of the second carbon fibers CFB2 adjacent to each other in the third direction DR3 may be the same. However, the present disclosure is not necessarily limited thereto, and the extending direction and the arrangement direction of the second carbon fibers CFB2 may be different depending on the display device DD (see Figure 1 )'s folding or sliding characteristics.

[0125] When the display device DD (see Figure 3 ) When changing from the expansion mode to the contraction mode or from the contraction mode to the expansion mode, an external force may be applied to the support bar MSB in the first direction DR1. The second carbon fiber CFB2 may extend perpendicularly to the direction in which the external force is applied and may be arranged in the direction in which the external force is applied. Therefore, the rigidity of the support bar MSB may be increased. Therefore, even when an external force is applied to the support bar MSB, the support bar MSB is not deformed, and thus the display device DD (see Figure 3 ) sliding reliability.

[0126] refer to Fig.14 and Fig.15 , the support rods MSB may be adhered to the flexible portion EFP. For example, the support rods MSB may be adhered to the lower surface of the first portion PT1. Each of the support rods MSB may be adhered to the lower surface of a corresponding first portion PT1 in the first portions PT1. The support rods MSB may overlap the first portion PT1. The adhesion between the support rods MSB and the flexible portion EFP will be Fig.18C Described in detail in.

[0127] When viewed from the second direction DR2, the first carbon fiber CFB1 may have a first radius r1. The second carbon fiber CFB2 may have a second radius r2. When viewed from the second direction DR2, the size of the first radius r1 of the first carbon fiber CFB1 and the size of the second radius r2 of the second carbon fiber CFB2 may be different from each other. The size of the first radius r1 may be smaller than the size of the second radius r2.

[0128] As the size of the radius of the carbon fibers CFB1 and CFB2 becomes larger, the resistance to the external force may become larger. As the size of the radius of the carbon fibers CFB1 and CFB2 becomes larger, the rigidity may become larger. For example, the support bar MSB including the second carbon fiber CFB2 may have high rigidity, and the flexible portion EFP including the first carbon fiber CFB1 may have relatively smaller rigidity than that of the support bar MSB.

[0129] Therefore, when the display device DD (see Figure 3) when changing to the expansion mode or the contraction mode, the support bar MSB will not be deformed even when an external force is applied to the support bar MSB. In addition, due to the small rigidity, the flexible portion EFP can be more easily folded in the contraction mode and accommodated in the case CS (see Figure 3 ), and the flexible portion EFP can more easily return to a flat shape in the extended mode. Therefore, the display device DD (see Figure 3 ) sliding reliability.

[0130] Fig.16A It is shown Fig.13 A perspective view of the second flat portion shown in FIG. Fig. 16B is a diagram for describing a second flat portion according to an embodiment.

[0131] For example, Fig.16A and Fig. 16B yes Fig.13 A perspective view of the fifth area AA5 shown in FIG.

[0132] refer to Fig.15 and Fig.16A , the second flat portion PLA2 may include a plurality of third carbon fibers CFB3. The third carbon fibers CFB3 may include CFRP. For example, the third carbon fibers CFB3 may be prepreg. Since the second flat portion PLA2 includes CFRP, the weight of the second flat portion PLA2 may be less than the weight of a plate including stainless steel (SUS).

[0133] The second flat portion PLA2 may be laminated into a plurality of layers in the third direction DR3. Fig.16A , nine layers are laminated, but the number of laminated layers of the third carbon fiber CFB3 is not necessarily limited thereto.

[0134] The third carbon fiber CFB3 laminated in each layer may be arranged in the first direction DR1 and extend in the second direction DR2. When viewed from the second direction DR2, the third carbon fiber CFB3 may have a third radius r3. The size of the third radius r3 may be the same as Fig.15 In this case, since the second carbon fiber CFB2 and the third carbon fiber CFB3 are substantially the same, the second flat portion PLA2 and the support rod MSB can be formed by preparing a second support plate PMTP2 (see Fig.18B ) are manufactured simultaneously. However, this is an example, and the present disclosure is not necessarily limited thereto.

[0135] refer to Fig.15 and Fig. 16B , Fig. 16BThe second flat portion PLA2a may include a plurality of third carbon fibers CFB3a. The third carbon fibers CFB3a may be laminated in the third direction DR3.

[0136] In the layer in which the third carbon fiber CFB3a is laminated, the extension direction and arrangement direction of the third carbon fiber CFB3a arranged in at least one layer may be different from the extension direction and arrangement direction of the third carbon fiber CFB3a in other layers. For example, in the direction from the upper side to the lower side, the third carbon fiber CFB3a in the first layer L1 may be arranged in the first direction DR1 and may extend in the second direction DR2. The third carbon fiber CFB3a in the second layer L2 may be arranged in the second direction DR2 and may extend in the first direction DR1. The third carbon fiber CFB3a in the third layer L3 may be arranged in the second direction DR2 and may extend in the first direction DR1. However, this is an example, and the extension direction and arrangement direction of the third carbon fiber CFB3a in each layer may be different according to the display device DD (see Figure 1 )'s folding and sliding characteristics.

[0137] When viewed from the second direction DR2, the third carbon fiber CFB3a may have a third radius r3a. The size of the third radius r3a and the size of the second radius r2 may be different from each other. The size of the third radius r3a may be smaller than the size of the second radius r2.

[0138] In this case, since the second carbon fibers CFB2 and the third carbon fibers CFB3a include CFRP having different sizes, the support bar MSB and the second flat portion PLA2a may be formed through different processes and then connected to each other.

[0139] Fig.17A and Fig. 17B 2 is a diagram for describing a second support plate according to an embodiment.

[0140] For example, Fig.17A yes Fig.13 A perspective view of the fourth area AA4 shown in FIG. Fig. 17B It is along Figure 4 A cross-sectional view taken along line II' shown in FIG.

[0141] For example, only the second extension part LE2 of the second supporting plate MTP2 is shown.

[0142] For ease of description, Fig. 17B In, omitted Figure 4 The display module DM shown in FIG.

[0143] because Fig. 17B The flexible part EFP and Fig.12The flexible portion EFP in is the same, so its description can be basically similar to the corresponding elements described above, and without describing the element in detail with respect to this figure, it can be understood that the element is at least similar to the corresponding elements already described elsewhere in the present disclosure.

[0144] refer to Fig.17A The second support plate MTP2a may further include a sub-plate SPM. The sub-plate SPM may be disposed on an upper surface of the support bar MSB. The support bar MSB may be disposed on a lower surface of the sub-plate SPM.

[0145] The sub-plate SPM may be parallel to a plane defined by the first direction DR1 and the second direction DR2. The sub-plate SPM may include a plurality of fourth carbon fibers CFB4. The fourth carbon fibers CFB4 may include CFRP. Since the sub-plate SPM includes CFRP, the weight of the sub-plate SPM may be less than that of a plate including stainless steel (SUS).

[0146] The fourth carbon fiber CFB4 may be laminated into a plurality of layers. Fig.17A In the embodiment of the present invention, the fourth carbon fiber CFB4 may be laminated into two layers. However, the present disclosure is not necessarily limited thereto, and the number of laminated layers of the fourth carbon fiber CFB4 may be determined according to the display device DD (see Figure 1 )'s folding or sliding characteristics.

[0147] The fourth carbon fibers CFB4 disposed in each layer of the sub-plate SPM may extend in the second direction DR2 and may be arranged in the first direction DR1. However, this is an example, and the extending direction and the arrangement direction of the fourth carbon fibers CFB4 may be changed.

[0148] The fourth carbon fiber CFB4 may have a fourth radius r4 when viewed from the second direction DR2. The size of the fourth radius r4 may be the same as that of the second radius r2.

[0149] A plurality of sub-openings SLO may be defined in the sub-plate SPM. The sub-openings SLO may pass through the sub-plate SPM. Hereinafter, a portion of the sub-plate SPM in which the sub-openings SLO are not defined is defined as a third portion PT3, and a portion of the sub-plate SPM in which the sub-openings SLO are defined is defined as a fourth portion PT4.

[0150] Since the sub-opening SLO is defined, the rigidity of the sub-plate SPM can be reduced. Therefore, when the sub-opening SLO is defined in the sub-plate SPM, the flexibility of the sub-plate SPM can be increased compared to the case where the sub-opening SLO is not defined in the sub-plate SPM. As a result, the sub-plate SPM can be bent more easily.

[0151] The support bar MSB may overlap with the third portion PT3. The support bar MSB may be arranged on the lower surface of the third portion PT3 of the sub-plate SPM. The support bar MSB may not overlap with the fourth portion PT4. The support bar MSB may not overlap with the sub-opening SLO.

[0152] refer to Fig.17A and Fig. 17B , the daughter board SPM may be adhered to the lower surface of the flexible part EFP. The third part PT3 of the daughter board SPM may be adhered to the lower surface of the first part PT1 of the flexible part EFP. The fourth part PT4 of the daughter board SPM may be adhered to the lower surface of the second part PT2 of the flexible part EFP. The support bar MSB may overlap the first part PT1 and the third part PT3.

[0153] When the sub-plate SPM is adhered to the lower surface of the flexible part EFP, the support bar MSB can be more easily connected to the flexible part EFP.

[0154] The flexible opening LOP and the sub-opening SLO may overlap each other. The flexible opening LOP and the sub-opening SLO may be connected to each other in the third direction DR3. Since the sub-opening SLO is defined, when the display device DD (see Figure 3 ) slides, the rigidity of the sub-panel SPM decreases and thus can bend more easily. Therefore, when the display device DD (see Figure 3 ) is in the retracted mode, the second support plate MTP2a can be more easily accommodated in the housing CS (see Figure 4 ). In addition, when the display device DD (see Figure 3 ) is in the extended mode, the second support plate MTP2a can be moved from the housing CS (see Figure 4 ) is exposed and can be more easily kept in a flat state.

[0155] 18A to 18E It shows the manufacturing Fig.15 A perspective view of the flexible portion and the method of supporting the rod shown in FIG.

[0156] For example, 18A to 18E It is a stereogram.

[0157] For ease of description, 18A to 18E Only a portion of the flexible portion EFP and the support rod MSB are shown.

[0158] refer to Fig.18A , manufacturing the flexible part EFP (see Fig.12) may include an operation of manufacturing a preliminary first support plate PMTP1. The preliminary first support plate PMTP1 may be manufactured by laminating a plurality of first carbon fibers CFB1. For example, the first carbon fibers CFB1 may be laminated into a first layer LY1, a second layer LY2, a third layer LY3, and a fourth layer LY4.

[0159] For example, the first carbon fiber CFB1 arranged in the first layer LY1 may extend in the second direction DR2 and may be arranged in the first direction DR1. The first carbon fiber CFB1 arranged in the second layer LY2 may extend in the first direction DR1 and may be arranged in the second direction DR2. The first carbon fiber CFB1 arranged in the third layer LY3 may extend in the first direction DR1 and may be arranged in the second direction DR2. The first carbon fiber CFB1 arranged in the fourth layer LY4 may extend in the second direction DR2 and may be arranged in the first direction DR1. However, this is an example, and the extending direction and the arrangement direction of the first carbon fiber CFB1 may be different depending on the display device DD (see Figure 1 )'s folding or sliding characteristics.

[0160] refer to Fig.18B , manufacturing support rod MSB (see Fig.14 ) may include an operation of manufacturing a preliminary second support plate PMTP2. The preliminary second support plate PMTP2 may be manufactured by laminating a plurality of second carbon fibers CFB2. For example, the second carbon fibers CFB2 may extend in the second direction DR2 and may be arranged in the first direction DR1 and the third direction DR3. However, this is an example, and the extending direction and the arrangement direction of the second carbon fibers CFB2 may be changed.

[0161] refer to Fig.18C , after manufacturing the preliminary first support plate PMTP1 and the preliminary second support plate PMTP2, an operation of adhering the preliminary first support plate PMTP1 and the preliminary second support plate PMTP2 to each other may be performed.

[0162] For example, the preliminary first support plate PMTP1 may be disposed on the upper surface of the preliminary second support plate PMTP2. When the preliminary first support plate PMTP1 is disposed on the upper surface of the preliminary second support plate PMTP2, pressure may be applied to the preliminary first support plate PMTP1 and the preliminary second support plate PMTP2. However, the present disclosure is not necessarily limited thereto, and heat may be applied to the preliminary first support plate PMTP1 and the preliminary second support plate PMTP2 to adhere the preliminary first support plate PMTP1 and the preliminary second support plate PMTP2.

[0163] refer to Fig.18D, after adhering the prepared first support plate PMTP1 and the prepared second support plate PMTP2 to each other, an operation of manufacturing the support rods MSB of the second support plate MTP2 may be performed. The operation of manufacturing the support rods MSB may include an operation of etching the prepared second support plate PMTP2. A plurality of support rods MSB may be manufactured by dry etching or wet etching the prepared second support plate PMTP2. However, the present disclosure is not necessarily limited thereto, and a plurality of support rods MSB may be manufactured by removing a portion of the prepared second support plate PMTP2 using a laser beam.

[0164] refer to Fig.18E , an operation of defining a flexible opening LOP in the first support plate MTP1 may be performed. After manufacturing the support bar MSB, the flexible opening LOP may be defined in the prepared first support plate PMTP1. The flexible opening LOP may be formed by irradiating the prepared first support plate PMTP1 with a laser beam. However, this is an example, and the flexible opening LOP may be defined by other processes.

[0165] After the flexible portion EFP and the supporting bar MSB are separately manufactured, a process for bonding the flexible portion EFP and the supporting bar MSB may be performed. The process for bonding the flexible portion EFP and the supporting bar MSB may be performed by a resin or a laser beam.

[0166] When the flexible part EFP and the support bar MSB are bonded to each other by resin, the height of the resin applied between the flexible part EFP and the support bar MSB may not be uniform. Therefore, the distance between the flexible part EFP and the support bar MSB may not be constant. Therefore, the display device DD (see Figure 1 ) may deteriorate in surface quality.

[0167] When the flexible part EFP and the support bar MSB are joined to each other by a laser beam, the support bar MSB may be arranged on the lower surface of the first portion PT1 of the flexible part EFP, and the flexible part EFP may be irradiated with the laser beam. In this case, when the positions of the flexible part EFP and the support bar MSB are changed due to an error in the process, defective joining between the flexible part EFP and the support bar MSB may occur.

[0168] Furthermore, the first support plate MTP1 and the second support plate MTP2 are manufactured in different processes and joined to each other, and thus the process time may increase.

[0169] According to an embodiment of the present disclosure, according to a method of manufacturing a display device, the flexible portion EFP and the support bar MSB may be integrally formed, for example, they may be together as part of a single uninterrupted structure. Therefore, the process of joining the flexible portion EFP and the support bar MSB may be omitted. Therefore, process time may be saved.

[0170] Furthermore, since the flexible portion EFP and the support bar MSB are not bonded by resin, the gap between the flexible portion EFP and the support bar MSB can be kept constant, and the display device DD (see FIG. 2 ) can be displayed. Figure 1 )’s surface quality can be increased.

[0171] Also, since the flexible portion EFP and the supporting bar MSB are not joined by a laser beam, even when an error occurs in the positions of the flexible portion EFP and the supporting bar MSB, defective joining between the flexible portion EFP and the supporting bar MSB can be prevented from occurring.

[0172] When manufacturing the flexible part EFP and the support rod MSB, it is possible to Figure 4 The flexible portion EFP and the supporting rods MSB are arranged on the lower surface of the display module DM.

[0173] According to an embodiment of the present disclosure, the first carbon fiber of the first support plate disposed under the display panel may be laminated into a plurality of layers. Among the plurality of layers, the arrangement direction of the first carbon fiber in at least one layer may be different from the arrangement direction of the first carbon fiber in other layers. Therefore, when the display device is folded or slid, the first support plate may maintain rigidity and restoring force. Therefore, the folding or sliding reliability of the display device may be increased.

[0174] The support rod of the second support plate disposed below the first support plate may include a second carbon fiber. The second carbon fiber may extend in the second direction. Therefore, when the display device slides in the second direction, the support rod may maintain rigidity. Therefore, the sliding reliability of the display device may be increased.

[0175] According to an embodiment of the present disclosure, the flexible portion and the support rod can be manufactured after the prepared first support plate and the prepared second support plate are attached to each other. Therefore, compared with the case where the flexible portion and the support rod are manufactured by separate processes and bonded to each other, the process time can be reduced, and the possibility of defects occurring in the display device in the process of bonding the flexible portion and the support rod can be reduced.

[0176] Although the embodiments of the present disclosure have been described above, it will be appreciated by those skilled in the art that various modifications and changes may be made to the present disclosure without departing from the spirit and scope of the present disclosure. In addition, it should be understood that the embodiments disclosed in the present disclosure are not necessarily intended to limit the technical spirit of the present disclosure.

Claims

1. A display device, comprising: A display module comprising a fixed area and an extended area extending from the fixed area in a first direction; The first supporting plate comprises: A first flat portion disposed below the fixing area; and a flexible portion disposed below the expansion region; and a second support plate comprising a plurality of support rods arranged below the flexible portion, arranged in the first direction and extending in a second direction intersecting the first direction, wherein the flexible portion comprises a first carbon fiber, wherein each of the plurality of support rods comprises a second carbon fiber, and The radius of the first carbon fiber and the radius of the second carbon fiber are different from each other.

2. The display device according to claim 1, wherein: The radius of the second carbon fiber is greater than the radius of the first carbon fiber.

3. The display device according to claim 1, wherein: The first carbon fiber includes a plurality of first carbon fiber structures, and the plurality of first carbon fiber structures are laminated into a plurality of layers.

4. The display device according to claim 3, wherein: In the plurality of layers in which the plurality of first carbon fiber structures are laminated, an extending direction of each of the plurality of first carbon fiber structures in at least one layer and an extending direction of each of the plurality of first carbon fiber structures in at least another layer are different from each other.

5. The display device according to claim 1, wherein: The second carbon fiber includes a plurality of second carbon fiber structures, and the plurality of second carbon fiber structures are laminated into a plurality of layers.

6. The display device according to claim 5, wherein: In each of the plurality of layers, the plurality of second carbon fiber structures are arranged in the first direction and extend in the second direction.

7. The display device according to claim 1, wherein: The flexible portion comprises: a plurality of first portions overlapping the support rods; and A plurality of second portions are disposed between adjacent pairs of the plurality of first portions, and the plurality of second portions define a plurality of flexible openings therein.

8. The display device according to claim 1, wherein: The fixing area includes a first non-folding area, a folding area, and a second non-folding area arranged in the first direction.

9. The display device according to claim 8, wherein: The first flat portion comprises: a first plane overlapping the first unfolded area; a first folded portion overlapping the folded region and defining a plurality of first openings therein; and The second plane overlaps the second unfolded area.

10. The display device according to claim 9, wherein: The second support plate further comprises: The second flat portion includes third carbon fibers and is disposed below the first flat portion.

11. The display device according to claim 10, wherein: The third carbon fiber includes a plurality of third carbon fiber structures, and the plurality of third carbon fiber structures are laminated into a plurality of layers.

12. The display device according to claim 11, wherein: The plurality of third carbon fiber structures laminated in each layer are arranged in the first direction and extend in the second direction.

13. The display device according to claim 11, wherein: In the plurality of layers in which the plurality of third carbon fiber structures are laminated, an extending direction of each of the plurality of third carbon fiber structures in at least one layer and an extending direction of each of the plurality of third carbon fiber structures in the other layers are different from each other.

14. The display device according to claim 10, wherein: The second flat portion comprises: a third plane overlapping the first plane; a second folded portion overlapping the first folded portion and defining a plurality of second openings therein; and A fourth plane overlaps with the second plane.

15. The display device according to claim 1, wherein: The second support plate further comprises: A sub-plate is disposed on the lower surface of the flexible portion, and the support rod is arranged on the lower surface of the sub-plate.

16. The display device according to claim 15, wherein: the sub-plate includes fourth carbon fibers including a plurality of fourth carbon fiber structures arranged in the first direction and extending in the second direction, and The size of the radius of the second carbon fiber is the same as the size of the radius of the fourth carbon fiber.

17. A method for manufacturing a display device, the method comprising: forming a preliminary first support plate by laminating a plurality of first carbon fibers; forming a preliminary second support plate by laminating a plurality of second carbon fibers; adhering the prepared first support plate to the upper surface of the prepared second support plate; forming a plurality of support rods by etching the prepared second support plate; forming a flexible portion by defining a plurality of flexible openings in the prepared first support plate; as well as connecting the flexible portion and the support rod to a display panel, The radius of each of the first carbon fibers is smaller than the radius of each of the second carbon fibers.

18. The method according to claim 17, wherein: The first carbon fibers are laminated into a plurality of layers, and in the plurality of layers in which the first carbon fibers are laminated, an extending direction of each of the first carbon fibers in at least one layer and an extending direction of each of the first carbon fibers in at least another layer are different from each other.

19. The method according to claim 18, wherein: The second carbon fibers are laminated into a plurality of layers, and in each of the plurality of layers, each of the second carbon fibers is arranged in a first direction and extends in a second direction intersecting the first direction.

20. The method according to claim 17, wherein: When forming the support bars, the support bars are formed by dry etching or laser etching the preliminary second support plate.

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