Display device

Abstract

To provide a display device with reduced warpage.SOLUTION: A display device according to an exemplary embodiment comprises a display panel, a cover configured to support a rear surface of the display panel, and a roller configured to wind or unwind the display panel and the cover. The cover includes an upper cover bonded to the display panel, including a first upper cover and a second upper cover comprising a plurality of recesses and a plurality of protrusions, where the first upper cover is disposed between the display panel and the second upper cover and is arranged to engage with the plurality of recesses and the plurality of protrusions of the second upper cover.SELECTED DRAWING: Figure 4a

Description

[Technical field]

[0001] The present invention relates to a display device, and more particularly to a rollable display device capable of displaying an image even when rolled up. [Background technology]

[0002] Display devices used in computer monitors, TVs, mobile phones, etc. include organic light emitting displays (OLEDs), which emit light themselves, and liquid crystal displays (LCDs), which require a separate light source.

[0003] Display devices are now used in a wide variety of applications, including not only computer monitors and TVs but also personal portable devices. Research is currently underway into display devices that have a large display area while being reduced in volume and weight.

[0004] In recent years, rollable display devices, which are manufactured by forming display elements, wiring, etc. on a flexible substrate such as plastic, which is a flexible material, so that they can display images even when rolled up, have been attracting attention as the next generation of display devices. Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a display device capable of improving warpage of a display panel.

[0006] Another problem to be solved by the present invention is to provide a display device having an improved rigidity of a display panel while reducing the thickness of the display device.

[0007] It is still another object of the present invention to provide a display device in which the phenomenon of an opening of an upper cover being visible is reduced.

[0008] It is still another object of the present invention to provide a display device in which bending of the display portion during winding is reduced.

[0009] The object of the present invention is not limited to the above-mentioned objects, and other objects not mentioned herein will be clearly understood by those skilled in the art from the following description. [Means for solving the problem]

[0010] In order to solve the above-mentioned problems, a display device according to one embodiment of the present invention includes a display panel, a cover supporting a rear surface of the display panel, and a roller configured to wind or unwind the display panel and the cover, the cover including an upper cover adhered to the display panel, the upper cover including a first upper cover and a second upper cover including a plurality of recesses and a plurality of protrusions, the first upper cover being disposed between the display panel and the second upper cover, and the first upper cover being disposed to engage with the plurality of recesses and the plurality of protrusions of the second upper cover.

[0011] In order to solve the above-mentioned problems, a plate for a display device according to another embodiment of the present invention includes a first plate including a plurality of first openings, and a second plate arranged on a rear surface of the first plate and including a plurality of protruding patterns, the plurality of protruding patterns of the second plate are inserted into the plurality of first openings of the first plate, and a distance between the plurality of protruding patterns and the side surfaces of the plurality of first openings increases from the center of the plate to the edge.

[0012] Further details of the embodiments are included in the detailed description and the drawings. Effect of the Invention

[0013] The present invention allows a display device to have a reduced thickness while maintaining its rigidity by arranging a plurality of back covers having different thicknesses so as to interlock with each other.

[0014] The present invention can prevent warping of the display device.

[0015] The present invention can minimize the phenomenon of an opening being visible in front of a display device.

[0016] The present invention can reduce the occurrence of bending of the display portion due to slippage of the upper cover during winding.

[0017] The effects of the present invention are not limited to the above-mentioned examples, and various other effects are included within the scope of the present invention. [Brief description of the drawings]

[0018] [Figure 1a] 1 is a perspective view of a display device according to an embodiment of the present invention; [Figure 1b] 1 is a perspective view of a display device according to an embodiment of the present invention; [Diagram 2] 1 is a perspective view of a display device according to an embodiment of the present invention; [Diagram 3] 1 is a schematic cross-sectional view of a display device according to an embodiment of the present invention; [Figure 4a] 2 is an exploded plan view illustrating an upper cover and a lower cover of a display device according to an embodiment of the present invention; [Figure 4b] 1 is a plan view of a display unit of a display device according to an embodiment of the present invention; [Diagram 5] FIG. 4b is a cross-sectional view taken along line VV' of FIG. [Figure 6a] 2 is a plan view of a first upper cover of a display device according to an embodiment of the present invention. [Figure 6b] 4 is a plan view of a second upper cover of the display device according to the embodiment of the present invention. FIG. [Figure 6c] 2 is a schematic cross-sectional view of an upper cover of a display device according to an embodiment of the present invention; [Figure 7] 1 is a schematic cross-sectional view illustrating a head bar and a display panel of a display device according to an embodiment of the present invention. [Figure 8] 11 is a schematic cross-sectional view of an upper cover of a display device according to another embodiment of the present invention. [Figure 9]11 is a schematic cross-sectional view of an upper cover of a display device according to still another embodiment of the present invention. [Figure 10a] 11 is a plan view of a first upper cover of a display device according to still another embodiment of the present invention. [Figure 10b] 13 is a plan view of a second upper cover of a display device according to still another embodiment of the present invention. [Figure 10c] 13 is a schematic plan view of an upper cover of a display device according to still another embodiment of the present invention. [Figure 10d] 11 is a schematic cross-sectional view of an upper cover of a display device according to still another embodiment of the present invention. [Figure 11a] 11 is a plan view of a first upper cover of a display device according to still another embodiment of the present invention. [Figure 11b] 13 is a plan view of a second upper cover of a display device according to still another embodiment of the present invention. [Figure 11c] 13 is a schematic plan view of an upper cover of a display device according to still another embodiment of the present invention. [Figure 11d] 11 is a schematic cross-sectional view of an upper cover of a display device according to still another embodiment of the present invention. [Figure 12] 11 is a schematic cross-sectional view of a second upper cover of a display device according to still another embodiment of the present invention. [Figure 13] 11 is a schematic plan view of a plate of a display device according to still another embodiment of the present invention; [Figure 14a] FIG. 14 is an enlarged plan view of FIG. [Figure 14b] FIG. 14 is an enlarged plan view of FIG. [Figure 14c] FIG. 14 is an enlarged plan view of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] The advantages and features of the present invention, as well as the methods for achieving them, will become apparent from the following detailed description of the embodiments in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, and may be embodied in various different forms, and the embodiments are provided solely for the purpose of making the disclosure of the present invention complete and fully conveying the scope of the invention to those skilled in the art to which the present invention pertains.

[0020] The shapes, areas, ratios, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of the present invention are illustrative, and the present invention is not limited to the illustrated matters. The same reference symbols refer to the same components throughout the specification. In addition, when describing the present invention, if it is determined that a detailed description of related known technology may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. When "includes," "has," "is made," etc. are used in the present invention, other parts may be added since "only" is not used. When a component is expressed in the singular, it includes the plural unless otherwise explicitly stated.

[0021] When interpreting elements, they are interpreted as including a margin of error even if there is no other explicit description.

[0022] When describing a positional relationship, for example when describing the positional relationship of two parts using "on top of," "at the top of," "at the bottom of," "next to," etc., one or more other parts may be located between the two parts, so long as "immediately" or "directly" is not used.

[0023] When an element or layer is referred to as "on" another element or layer, this includes the case where the element or layer is directly on top of the other element, or has other layers or elements interposed therebetween.

[0024] In addition, although the terms "first", "second" and the like are used to describe various components, these components are not limited by these terms. These terms are used merely to distinguish one component from another. Therefore, the first component referred to below may be the second component within the technical concept of the present invention.

[0025] Like reference numbers refer to like elements throughout the specification.

[0026] The area and thickness of each component shown in the drawings are shown for convenience of explanation, and the present invention is not necessarily limited to the area and thickness of the components shown.

[0027] The respective features of the various embodiments of the present invention may be partially or fully combined or combined with each other, and may be technically interlocked and driven in various ways, and each embodiment may be implemented independently of each other or may be implemented together in a related relationship.

[0028] Various embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0029] <Display device - rollable display device> The rollable display device may be referred to as a display device capable of displaying an image even when rolled up. The rollable display device may have high flexibility compared to conventional general display devices. The shape of the rollable display device may be freely changed depending on whether the rollable display device is used or not. Specifically, when the rollable display device is not used, the rollable display device may be rolled up to reduce its volume for storage. Conversely, when the rollable display device is used, the rolled up rollable display device may be unfolded and used again.

[0030] 1a and 1b are perspective views of a display device according to an embodiment of the present invention, which includes a display part DP and a housing part HP.

[0031] The display unit DP is a configuration for displaying an image to a user, and may include, for example, a display element, a circuit for driving the display element, wiring, and components. Since the display device 100 according to an embodiment of the present invention is a rollable display device 100, the display unit DP may be configured to be capable of winding or unwinding. For example, the display unit DP may include a display panel 120 and an upper cover 110a having flexibility to enable winding or unwinding. A more detailed description of the display unit DP will be given later with reference to FIGS. 4a to 5.

[0032] The housing part HP is a case in which the display part DP can be housed.

[0033] The housing part HP has an opening HPO arranged therein so that the display part DP can move inside and outside the housing part HP.

[0034] Meanwhile, the display unit DP of the display device 100 can be converted from a full unwinding state as shown in FIG. 1a to a full winding state as shown in FIG. 1b, or from a full winding state to a full unwinding state.

[0035] To convert the display unit DP to a fully unwound state or a fully wound state, a driving unit MP is arranged to wind or unwind the display unit DP.

[0036] <Drive unit> Fig. 2 is a perspective view of a display device according to an embodiment of the present invention. Fig. 3 is a schematic cross-sectional view of a display device according to an embodiment of the present invention. Fig. 3 is a schematic cross-sectional view for explaining a roller 161 and a display unit DP of a display device 100 according to an embodiment of the present invention. For convenience of explanation, Fig. 3 shows only a housing part HP, a roller 161 and a display unit DP.

[0037] First, referring to FIG. 2, the driving unit MP includes a roller unit 160 and a lifting unit 170.

[0038] The roller unit 160 rotates clockwise or counterclockwise to wind or unwind the display unit DP fixed to the roller unit 160. The roller unit 160 includes a roller 161 and a roller support unit 162.

[0039] The roller 161 is a member around which the display unit DP is wound. The roller 161 may be formed, for example, in a cylindrical shape. A lower edge of the display unit DP may be fixed to the roller 161. When the roller 161 rotates, the display unit DP whose lower edge is fixed to the roller 161 may be wound around the roller 161. On the other hand, when the roller 161 rotates in the opposite direction, the display unit DP wound around the roller 161 may be unwinded from the roller 161.

[0040] Referring to FIG. 3, the roller 161 may be formed in a cylindrical shape with at least a portion of the outer circumferential surface being flat and the remaining portion of the outer circumferential surface being curved. The roller 161 may be generally cylindrical, but may be formed in a portion being flat. That is, a portion of the outer circumferential surface of the roller 161 may be formed flat and the remaining portion of the outer circumferential surface may be formed in a curved surface. For example, the roller 161 may be formed of a curved portion 161R and a flat portion 161F, and the flat portion 161F of the roller 161 may be a portion on which a plurality of flexible films and a printed circuit board of the display unit DP are seated. However, the roller 161 may be formed in a completely cylindrical shape or in any shape capable of winding the display unit DP, and is not limited thereto.

[0041] 2, the roller support part 162 supports the roller 161 on both sides of the roller 161. Specifically, the roller support part 162 is disposed on the bottom surface HPF of the housing part HP. The upper end side of the roller support part 162 is coupled to both ends of the roller 161. Thus, the roller support part 162 may support the roller 161 such that the roller 161 is spaced apart from the bottom surface HPF of the housing part HP. At this time, the roller 161 may be rotatably coupled to the roller support part 162.

[0042] The lifting unit 170 moves the display unit DP up and down in accordance with the drive of the roller unit 160. The lifting unit 170 includes a link unit 171, a head bar 172, a motor 175, and a rotating unit 176.

[0043] The link unit 171 of the lifting unit 170 includes a plurality of links 171a, 171b and a hinge unit 171c connecting the links 171a, 171b. Specifically, the links 171a, 171b include a first link 171a and a second link 171b, which cross each other in a scissors shape and are rotatably fastened to each other via the hinge unit 171c. Thus, when the link unit 171 moves up and down, the links 171a, 171b can rotate in a direction in which they move away from or closer to each other. The link unit 171 may be composed of a plurality of links 171a, 171b crossing each other, but is not limited thereto, and may be composed of a single link that does not cross other links.

[0044] Head bar 172 of lifting unit 170 is fixed to the uppermost end of display unit DP. Head bar 172 is connected to link unit 171, and can move display unit DP in the vertical direction by rotating multiple links 171a, 171b of link unit 171. That is, display unit DP can be moved in the vertical direction by head bar 172 and link unit 171.

[0045] The head bar 172 covers only a portion of the surface adjacent to the top edge of the display unit DP so as not to block the image displayed in front of the display unit DP. The display unit DP and the head bar 172 may be fixed with screws, but are not limited to this.

[0046] The motor 175 may be connected to a power generating unit, such as a separate external power source or a built-in battery, and may receive power from the power generating unit. The motor 175 generates a rotational force to provide a driving force to the rotating unit 176.

[0047] The rotating units 176 are each connected to a motor 175 and configured to convert the rotational motion from the motor 175 into a linear reciprocating motion. That is, the rotational motion of the motor 175 can be converted into a linear reciprocating motion of a structure fixed to the rotating unit 176. For example, the rotating unit 176 can be embodied as a ball screw including a shaft and a nut fastened to the shaft, but is not limited thereto.

[0048] The motor 175 and the rotating unit 176 can raise and lower the display unit DP in cooperation with the link unit 171. The link unit 171 is formed in a link structure, and can repeatedly perform folding and unfolding operations by receiving driving force from the motor 175 and the rotating unit 176.

[0049] Specifically, when the display unit DP is wound, the motor 175 is driven to linearly move the structure of the rotating unit 176. That is, a part of the rotating unit 176 to which one end of the second link 171b is connected can linearly move. Then, one end of the second link 171b can move toward the motor 175, and the links 171a and 171b can be folded, so that the height of the link unit 171 can be reduced. In addition, in the process in which the links 171a and 171b are folded, the head bar 172 connected to the first link 171a also descends, and one end of the display unit DP connected to the head bar 172 also descends.

[0050] When the display unit DP is unwound, the motor 175 is driven, so that the structure of the rotating unit 176 can move linearly. That is, a part of the rotating unit 176 to which one end of the second link 171b is connected can move linearly. As a result, one end of the second link 171b can move in a direction away from the motor 175, and the links 171a and 171b can be spread apart, so that the height of the link unit 171 can be increased. In addition, in the process in which the links 171a and 171b are spread apart, the head bar 172 connected to the first link 171a also rises, and the display unit DP connected to the head bar 172 also rises.

[0051] Therefore, when the display unit DP is fully wound on the rollers 161, the link portion 171 of the lifting / lowering unit 170 maintains the folded state. That is, when the display unit DP is fully wound on the rollers 161, the lifting / lowering unit 170 may have the lowest height. In contrast, when the display unit DP is fully unwound, the link portion 171 of the lifting / lowering unit 170 maintains the unfolded state. That is, when the display unit DP is fully unwound, the lifting / lowering unit 170 may have the highest height.

[0052] Meanwhile, when winding the display unit DP, the roller 161 can rotate, and the display unit DP can be wound around the roller 161. Taking FIG 3 as an example, the lower edge of the display unit DP is connected to the roller 161. When the roller 161 rotates in the first direction DR1, i.e., clockwise, the rear surface of the display unit DP can be in close contact with the surface of the roller 161, and the display unit DP can be wound around the roller 161.

[0053] When unwinding the display unit DP, the roller 161 can rotate, and the display unit DP can be unwinded from the roller 161. Taking Fig. 3 as an example, when the roller 161 rotates in the second direction DR2, i.e., counterclockwise, the display unit DP wound around the roller 161 can be unwinded from the roller 161 and disposed outside the housing part HP.

[0054] In some embodiments, a driving unit MP having a structure other than the above-described driving unit MP may be applied to the display device 100. That is, as long as the display unit DP can be wound and unwound, the configurations of the roller unit 160 and the lifting unit 170 described above may be changed, some components may be omitted, or other components may be added.

[0055] <Display> Fig. 4a is an exploded plan view illustrating an upper cover and a lower cover of a display device according to an embodiment of the present invention, Fig. 4b is a plan view of a display unit of a display device according to an embodiment of the present invention, and Fig. 5 is a cross-sectional view taken along V-V' of Fig. 4b.

[0056] 4a and 4b, the display unit DP includes an upper cover 110a, a display panel 120, a plurality of flexible films 130, a printed circuit board 140, and a lower cover 110b. However, without being limited thereto, the display unit DP may be defined as including only the display panel 120, the plurality of flexible films 130, and the printed circuit board 140.

[0057] 4a and 4b, the upper cover 110a is disposed on the rear surface of the display panel 120 and supports the display panel 120. The upper cover 110a may also be referred to as a back cover in that it is disposed on the rear surface of the display panel 120. The size of the upper cover 110a may be larger than the size of the display panel 120. The upper cover 110a can protect the display unit DP from the outside.

[0058] The top cover 110a can be fastened to the head bar 172 and the bottom cover 110b.

[0059] The upper cover 110a includes a first region A1, a second region A2, and a third region A3. The first region A1 and the second region A2 are regions where the plurality of openings 111 are not arranged, and the third region A3 is a region where the plurality of openings 111 are arranged. Specifically, the upper cover 110a includes the first region A1, the second region A2, and the third region A3, and the first region A1, the third region A3, and the second region A2 are arranged in sequence from the top end of the upper cover 110a. At this time, since the upper cover 110a is wound or unwound in the column direction, the first region A1, the second region A2, and the third region A3 may be arranged along the column direction.

[0060] The first region A1 of the upper cover 110a is an uppermost region of the upper cover 110a and is a region to be fastened to the head bar 172. A plurality of first fastening holes AH1 may be formed in the first region A1 for fastening to the head bar 172. For example, a fastening member penetrating the head bar 172 and the plurality of first fastening holes AH1 may be disposed to fasten the head bar 172 to the first region A1. Then, by fastening the first region A1 to the head bar 172, when the link part 171 fastened to the head bar 172 rises or falls, the upper cover 110a may rise or fall together with the link part 171, and the display panel 120 attached to the upper cover 110a may rise or fall together with the link part 171.

[0061] The first fastening holes AH1 may be arranged in a plurality of rows. For example, the first fastening holes AH1 may include a plurality of first upper fastening holes AH1a arranged in a row direction and a plurality of first lower fastening holes AH1b arranged in a row direction below the first upper fastening holes AH1a.

[0062] Although the number of the first fastening holes AH1 is shown as 10 in FIG. 4a and FIG. 4b, the number of the first fastening holes AH1 is not limited thereto.

[0063] The second area A2 of the upper cover 110a is an area extending from the third area A3 and is the lowermost area of ​​the upper cover 110a. One end of the display panel 120 is disposed in the second area A2. For example, a pad area, which is a non-display area at one end of the display panel 120, may be disposed in the second area A2.

[0064] The third region A3 of the upper cover 110a is an area disposed between the first region A1 and the second region A2. The third region A3 is an area in which a plurality of openings 111 are disposed and where the display panel 120 is attached. Specifically, the third region A3 is an area that is wound or unwound around the rollers 161 together with the display panel 120. The third region A3 may overlap at least the display panel 120 among other components of the display unit DP.

[0065] Referring to Fig. 4a, the second fastening holes AH2 are disposed in the second region A2. The second fastening holes AH2 may be holes for fastening the lower cover 110b and the upper cover 110a to each other. Although Fig. 4a shows that the number of the second fastening holes AH2 is nine, the number of the second fastening holes AH2 is merely an example and is not limited thereto.

[0066] Meanwhile, the first region A1 and the second region A2 do not have a plurality of openings 111 formed in the third region A3. Specifically, the first region A1 and the second region A2 only have a first fastening hole AH1 and a second fastening hole AH2, respectively, and do not have a plurality of openings 111 formed in the third region A3. Also, the first fastening hole AH1 and the second fastening hole AH2 have different shapes from the plurality of openings 111.

[0067] The first region A1 is a region fixed to the head bar 172, and the second region A2 is a region where one end of the display panel 120, the flexible films 130, and the printed circuit board 140 are supported, and may have a greater rigidity than the third region A3. Since the first region A1 and the second region A2 have rigidity, the first region A1 and the second region A2 may be firmly fixed to the head bar 172 and the lower cover 110b. The second region A2 may protect the pad region and the printed circuit board 140 of the display panel 120 by keeping the pad region and the printed circuit board 140 at one end of the display panel 120 flat. Therefore, the display unit DP is fixed to the head bar 172 of the driver MP and may be moved to the inside or outside of the housing part HP by the operation of the driver MP, and may protect the pad region and the printed circuit board 140 at one end of the display panel 120.

[0068] Meanwhile, in FIG. 4a, the first region A1, the second region A2, and the third region A3 of the upper cover 110a are shown to be arranged sequentially along the column direction, but when the upper cover 110a is wound in the row direction, the first region A1, the second region A2, and the third region A3 may be arranged along the row direction.

[0069] When the display unit DP is wound or unwound, the plurality of openings 111 disposed in the third region A3 of the upper cover 110a may be deformed by stress applied to the display unit DP. Specifically, when the display unit DP is wound or unwound, the third region A3 of the upper cover 110a may be deformed by the plurality of openings 111 contracting or expanding. In addition, by the plurality of openings 111 contracting or expanding, a slip phenomenon of the display panel 120 disposed on the third region A3 of the upper cover 110a is minimized, and stress applied to the display panel 120, i.e., stress, may be minimized.

[0070] 4a and 5, the upper cover 110a includes a first upper cover 110a1 and a second upper cover 110a2 disposed on a rear surface of the first upper cover 110a1. The first upper cover 110a1 may be attached to the display panel 120. The second upper cover 110a2 may be disposed to engage with the first upper cover 110a1.

[0071] The top cover 110a will be described in more detail below with reference to Figures 6a to 6c.

[0072] The lower cover 110b is fastened to the upper cover 110a and the rollers 161 to connect the upper cover 110a to the rollers 161. In the above-mentioned manner, the lower cover 110b connects the upper cover 110a to the rollers 161, and finally connects the display panel 120 disposed in the upper cover 110a to the rollers 161. However, without being limited thereto, as long as the lower cover 110b can be connected to the upper cover 110a and the rollers 161, the shape or connecting method of the lower cover 110b may be variously changed according to the design, and is not limited thereto.

[0073] One end of the lower cover 110b is the topmost region of the lower cover 110b and may overlap one end of the upper cover 110a. For example, one end of the lower cover 110b may overlap the second region A2. One end of the lower cover 110b may overlap and be connected to a portion of the upper cover 110a, or may be connected to each other using a connecting member or the like, but is not limited thereto.

[0074] The lower cover 110b may include a plurality of fastening parts overlapping the upper cover 110a. The plurality of fastening parts are disposed at one end of the lower cover 110b. In addition, the plurality of fastening parts may have a plurality of third fastening holes AH3 for fastening to the upper cover 110a. The plurality of fastening parts in which the plurality of third fastening holes AH3 are disposed are spaced apart from each other, and a space in which the plurality of flexible films 130 may be bent may be secured between the plurality of fastening parts. Although the number of third fastening holes AH3 is shown as nine in FIG. 4a, the number of the third fastening holes AH3 is merely an example and is not limited thereto.

[0075] In FIG. 4a, it has been described that the second fastening hole AH2 and the third fastening hole AH3 for fastening the upper cover 110a and the lower cover 110b are arranged in the second region A2 of the upper cover 110a and one end of the lower cover 110b, respectively. However, the upper cover 110a and the lower cover 110b may be fixed to each other without separate fastening holes.

[0076] The region from one end to the other end of the lower cover 110b is an extended region such that the display area AA of the display panel 120 can be disposed outside the housing part HP. For example, when the upper cover 110a and the display panel 120 are in a fully unwound state, the region from the other end of the lower cover 110b fixed to the roller 161 to one end of the lower cover 110b where the flexible films 130 and the printed circuit board 140 are disposed can be disposed inside the housing part HP, and the third region A3 and the first region A1 where the display area AA of the display panel 120 is disposed can be disposed outside the housing part HP. That is, the region from the other end of the lower cover 110b fixed to the roller 161 to at least a portion of one end of the lower cover 110b and the second region A2 can be disposed inside the housing part HP.

[0077] The other end of the lower cover 110b is the lowermost region of the lower cover 110b, and is a region to be fastened to the roller 161. A fourth fastening hole AH4 may be formed at the other end of the lower cover 110b to fasten to the roller 161. For example, a fastening member penetrating the roller 161 and the fourth fastening hole AH4 may be disposed to fasten the roller 161 and the other end of the lower cover 110b. Then, the display panel 120, the upper cover 110a, and the lower cover 110b may be wound or unwound around the roller 161 by fastening the other end of the lower cover 110b to the roller 161. Although the number of the fourth fastening holes AH4 is two in FIG. 4a, the number of the fourth fastening holes AH4 is not limited thereto.

[0078] Meanwhile, the lower cover 110b does not have a plurality of openings 111 formed in the third region A3 of the upper cover 110a. Specifically, only a third fastening hole AH3 and a fourth fastening hole AH4 are formed at one end and the other end of the lower cover 110b, and the plurality of openings 111 formed in the third region A3 of the upper cover 110a are not formed. In addition, the third fastening hole AH3 and the fourth fastening hole AH4 have different shapes from the plurality of openings 111.

[0079] The lower cover 110b may be made of a flexible material so that it can be wound or unwound onto a roller. For example, the lower cover 110b may be made of a plastic material such as PET. However, the material of the lower cover 110b may be changed in various ways depending on the design as long as it satisfies physical property conditions such as thermal deformation amount, curvature radius, rigidity, etc., and is not limited thereto.

[0080] In the present specification, the upper cover 110a and the lower cover 110b are described as being formed separately, but the present invention is not limited thereto, and the upper cover 110a and the lower cover 110b may be formed integrally.

[0081] 4b and 5, the display panel 120 is disposed on one surface of the upper cover 110a. The display panel 120 is disposed in a third area A3 on one surface of the upper cover 110a. The display panel 120 is a panel for displaying images to a user. The display panel 120 may include display elements for displaying images, driving elements for driving the display elements, wiring for transmitting various signals to the display elements and the driving elements, etc.

[0082] The display element may be defined differently depending on the type of the display panel 120. For example, if the display panel 120 is an organic light emitting display panel, the display element may be an organic light emitting element including an anode, an organic light emitting layer, and a cathode. For example, if the display panel 120 is a liquid crystal display panel, the display element may be a liquid crystal display element. In the following description, it is assumed that the display panel 120 is an organic light emitting display panel, but the display panel 120 is not limited to an organic light emitting display panel. In addition, since the display device 100 according to an embodiment of the present invention is a rollable display device 100, the display panel 120 may be embodied as a flexible display panel 120 to be wound or unwound on a roller 161.

[0083] The display panel 120 includes a display area AA and a non-display area NA.

[0084] The display area AA is an area where an image is displayed on the display panel 120. A plurality of sub-pixels constituting a plurality of pixels and a driving circuit for driving the plurality of sub-pixels may be arranged in the display area AA. The plurality of sub-pixels are the smallest units constituting the display area AA, and a display element may be arranged in each of the plurality of sub-pixels. For example, an organic light-emitting element including an anode, an organic light-emitting layer, and a cathode may be arranged in each of the plurality of sub-pixels, but is not limited thereto. In addition, the driving circuit for driving the plurality of sub-pixels may include a driving element, wiring, etc. For example, the driving circuit may be composed of a thin film transistor, a storage capacitor, a gate wiring, a data wiring, etc., but is not limited thereto.

[0085] The non-display area NA is an area where no image is displayed. Various wirings and circuits for driving the organic light emitting elements of the display area AA are arranged in the non-display area NA. For example, the non-display area NA may be arranged with link wirings for transmitting signals to the sub-pixels and driving circuits of the display area AA, or driving ICs such as gate driver ICs and data driver ICs, but is not limited thereto.

[0086] On the other hand, the non-display area NA includes a pad area.

[0087] The pad area is an area where a plurality of pads are arranged. The plurality of pads are electrodes for electrically connecting the plurality of flexible films 130 and the display panel 120, and the plurality of flexible films 130 and the display panel 120 may be electrically connected through the plurality of pads. The pad area may be a non-display area NA that overlaps the second area A2 of the upper cover 110a among the non-display area NA. However, the pad area may be formed in another part of the non-display area NA depending on the arrangement of the plurality of flexible films 130, and is not limited thereto.

[0088] Referring to FIG. 5, the display panel 120 includes a substrate 121 , a buffer layer 122 , a pixel portion 123 , an encapsulation layer 124 , and an encapsulation substrate 125 .

[0089] The substrate 121 is a base member for supporting various components of the display panel 120 and may be made of an insulating material. The substrate 121 may be made of a material having flexibility so that the display panel 120 can be wound or unwound. For example, the substrate 121 may be made of a plastic material such as polyimide (PI).

[0090] A buffer layer 122 is disposed on the upper surface of the substrate 121. The buffer layer 122 can prevent the diffusion of moisture and / or oxygen that has penetrated from the outside of the substrate 121. The buffer layer 122 can be made of an inorganic material, and for example, the buffer layer 122 can be made of a single layer or multiple layers of silicon oxide (SiOx) or silicon nitride (SiNx), but is not limited thereto.

[0091] The pixel unit 123 is disposed on the upper surface of the substrate 121 and the buffer layer 122. The pixel unit 123 includes a plurality of organic light emitting elements and a circuit for driving the organic light emitting elements. The pixel unit 123 may be disposed to correspond to the display area AA.

[0092] Meanwhile, depending on the direction in which the light emitted from the organic light emitting element is emitted, the display panel 120 may be configured in a top emission or bottom emission manner.

[0093] In the top emission type, light emitted from the organic light emitting element is emitted to the upper part of the substrate 121 on which the organic light emitting element is formed. In the case of the top emission type, a reflective layer may be formed under the anode in order to direct the light emitted from the organic light emitting element to the upper part of the substrate 121, i.e., the cathode side.

[0094] In the bottom emission type, light emitted from the organic light emitting element is emitted to the bottom of the substrate 121 on which the organic light emitting element is formed. In the bottom emission type, in order to cause the light emitted from the organic light emitting element to travel to the bottom of the substrate 121, the anode may be made of only a transparent conductive material, and the cathode may be made of a metal material with high reflectivity.

[0095] In the following description, for convenience of explanation, it is assumed that the display device 100 according to the embodiment of the present invention is a bottom emission type display device, but the present invention is not limited thereto.

[0096] The encapsulation layer 124 is disposed to cover the pixel unit 123. The encapsulation layer 124 seals the organic light emitting element of the pixel unit 123. The encapsulation layer 124 can protect the organic light emitting element of the pixel unit 123 from external moisture, oxygen, impact, etc. The encapsulation layer 124 can be formed by alternately laminating a plurality of inorganic layers and a plurality of organic layers. For example, the inorganic layer can be made of an inorganic material such as silicon nitride (SiNx), silicon oxide (SiOx), aluminum oxide (AlOx), etc., and the organic layer can be made of an epoxy-based or acrylic-based polymer, but is not limited thereto.

[0097] The encapsulation substrate 125 is disposed on the encapsulation layer 124. Specifically, the encapsulation substrate 125 is disposed between the encapsulation layer 124 and the upper cover 110a. The encapsulation substrate 125 can protect the organic light emitting element of the pixel unit 123 together with the encapsulation layer 124. The encapsulation substrate 125 can protect the organic light emitting element of the pixel unit 123 from external moisture, oxygen, impact, and the like. For example, the encapsulation substrate 125 can be made of a material having a high modulus (e.g., Young's modulus) of about 200 to 900 MPa, and the encapsulation substrate 125 can be made of a metal material such as aluminum (Al), nickel (Ni), chromium (Cr), or an alloy material of iron (Fe) and nickel, which has high corrosion resistance and can be easily processed into a foil or thin film. Thus, by forming the encapsulation substrate 125 from a metal material, the encapsulation substrate 125 can be realized in an ultra-thin film form, and can be provided with high protection resistance against external impacts and scratches.

[0098] An adhesive layer AD is disposed between the encapsulation layer 124 and the encapsulation substrate 125. The adhesive layer AD can adhere the encapsulation layer 124 and the encapsulation substrate 125. The adhesive layer AD is made of a material having adhesive properties and may be a thermosetting or natural curing adhesive. For example, the adhesive layer AD may be made of an OCA (Optical Clear Adhesive), a PSA (Pressure Sensitive Adhesive), or the like, but is not limited thereto.

[0099] Meanwhile, the adhesive layer AD may be disposed to surround the encapsulation layer 124 and the pixel unit 123. That is, the pixel unit 123 may be sealed by the buffer layer 122 and the encapsulation layer 124, and the encapsulation layer 124 and the pixel unit 123 may be sealed by the buffer layer 122 and the adhesive layer AD. The adhesive layer AD, together with the encapsulation layer 124 and the encapsulation substrate 125, may protect the organic light emitting element of the pixel unit 123 from external moisture, oxygen, impact, and the like. In this case, the adhesive layer AD may further include a moisture absorbent. The moisture absorbent may be a particle having moisture absorption properties, and may absorb moisture and oxygen from the outside, thereby minimizing the penetration of moisture and oxygen into the pixel unit 123.

[0100] 5, an adhesive unit 190 is disposed to adhere the display panel 120 to the upper cover 110a. The adhesive unit 190 is disposed between the display panel 120 and the upper cover 110a to adhere the display panel 120 to the upper cover 110a. The adhesive unit 190 may adhere the display panel 120 to the upper cover 110a in a manner of adhering the encapsulation substrate 125 to the upper cover 110a. The adhesive unit 190 may be disposed between the encapsulation substrate 125 and the upper cover 110a to adhere the encapsulation substrate 125 to the upper cover 110a.

[0101] Meanwhile, although not shown in the drawings, a polarizing plate may be disposed on the rear surface of the display panel 120. The polarizing plate may selectively transmit light and reduce reflection of external light incident on the display panel 120. Specifically, the display panel 120 includes various metal materials that are applied to semiconductor elements, wiring, organic light emitting elements, etc. Thus, external light incident on the display panel 120 may be reflected from the metal materials, and the visibility of the display device 100 may be reduced due to the reflection of the external light. However, when a polarizing plate is disposed, the polarizing plate may prevent reflection of external light and improve the outdoor visibility of the display device 100. However, the polarizing plate may be omitted depending on the embodiment of the display device 100.

[0102] 4b, a plurality of flexible films 130 are disposed at one end of the display panel 120. Each of the plurality of flexible films 130 is a film in which various components are disposed on a ductile base film, and is used to supply signals to a plurality of sub-pixels and driving circuits constituting a plurality of pixels in the display area AA, and may be electrically connected to the display panel 120. The plurality of flexible films 130 have one end disposed in the non-display area NA of the display panel 120, and may supply a power supply voltage, a data voltage, and the like to the sub-pixels and driving circuits in the display area AA. Meanwhile, although the number of the plurality of flexible films 130 is illustrated as eight in FIG. 4b, the number of the plurality of flexible films 130 may be variously changed according to a design, and is not limited thereto.

[0103] Driving ICs such as gate driver ICs and data driver ICs may be disposed on the base film of the plurality of flexible films 130. The driving ICs are components that process data for displaying images and driving signals for processing the data. The driving ICs may be disposed in a manner such as chip on glass (COG), chip on film (COF), tape carrier package (TCP), etc., depending on the mounting manner.

[0104] Meanwhile, the plurality of flexible films 130 are components in which a base film, data for displaying an image on the base film, and various driving ICs for controlling the data are disposed, and are components for displaying an image. The plurality of flexible films 130 are electrically connected to a pad region at one end of the display panel 120 and bent toward the rear surface of the upper cover 110a. One end of the plurality of flexible films 130 may be connected to one end of the display panel 120 on one surface of the upper cover 110a, and the other end of the plurality of flexible films 130 may be disposed on the opposite surface of the one surface of the upper cover 110a.

[0105] Referring to FIG. 4b, the printed circuit board 140 is disposed on the rear surface of the upper cover 110a and connected to the flexible films 130. That is, the printed circuit board 140 is disposed on the rear surface of the upper cover 110a and electrically connected to the flexible films 130. The printed circuit board 140 is a component that supplies signals to the driving ICs of the flexible films 130. The printed circuit board 140 may have various components disposed thereon for supplying various signals, such as driving signals, data signals, etc., to the driving ICs. Meanwhile, although FIG. 4b shows two printed circuit boards 140, the number of printed circuit boards 140 may be variously changed according to the design and is not limited thereto.

[0106] Meanwhile, although not shown in Fig. 4b, an additional printed circuit board may be further disposed to be connected to the printed circuit board 140. For example, the printed circuit board 140 may be referred to as a source printed circuit board (S-PCB) on which a data driver is mounted, and the additional printed circuit board connected to the printed circuit board 140 may be referred to as a control printed circuit board (C-PCB) on which a timing controller, etc. are mounted. The additional printed circuit board may be disposed within the roller 161, may be disposed within the housing part HP outside the roller 161, or may be disposed so as to be in direct contact with the printed circuit board 140.

[0107] Reference is now made to both Figures 6a to 6c for a more detailed description of the top cover 110a.

[0108] <Upper cover> Fig. 6a is a plan view of a first upper cover of a display device according to an embodiment of the present invention. Fig. 6b is a plan view of a second upper cover of a display device according to an embodiment of the present invention. Fig. 6c is a schematic cross-sectional view of an upper cover of a display device according to an embodiment of the present invention. In Fig. 6c, the opening 111 is omitted for convenience of illustration.

[0109] The upper cover 110a includes a first upper cover 110a1 and a second upper cover 110a2.

[0110] The first upper cover 110a1 is disposed on the rear surface of the display panel 120 and supports the display panel 120.

[0111] 6a, the first upper cover 110a1 includes a plurality of first fastening holes AH1 arranged in an area corresponding to the first area A1 of the upper cover 110a. The plurality of first fastening holes AH1 of the first upper cover 110a1 are arranged to fix the head bar 172, the upper cover 110a, and the display panel 120. Thus, the plurality of first fastening holes AH1 of the first upper cover 110a1 may be arranged at positions corresponding to a plurality of fastening members for fixing the head bar 172, the upper cover 110a, and the display panel 120. For example, when a plurality of fastening members are arranged in a first row and a second row, the first fastening holes AH1 of the first upper cover 110a1 may include a plurality of first upper fastening holes AH1a arranged in the first row and a plurality of first lower fastening holes AH1b arranged in the second row corresponding to the positions of the plurality of fastening members. In addition, when the cross-sectional shape of the multiple fastening members is circular, the first fastening holes AH1 of the first upper cover 110a1 may also be arranged in a circular shape corresponding to the cross-sectional shape of the multiple fastening members.

[0112] Next, the first upper cover 110a1 includes a second fastening hole AH2 disposed in a region corresponding to the second region A2 of the upper cover 110a. The second fastening hole AH2 of the first upper cover 110a1 may be a hole for fastening the lower cover 110b and the upper cover 110a to each other.

[0113] Referring to FIG. 6a, the first upper cover 110a1 includes a first ductile region MA1 in a region corresponding to the third region A3 of the upper cover 110a. The first ductile region MA1 of the first upper cover 110a1 includes a plurality of first openings 111a. The plurality of first openings 111a are arranged alternately with respect to the plurality of first openings 111a in adjacent rows. For example, the plurality of first openings 111a arranged in one row are arranged alternately with the plurality of first openings 111a arranged in a row adjacent to the corresponding row. Specifically, the centers of the plurality of first openings 111a arranged in odd rows and the centers of the plurality of first openings 111a arranged in even rows may be arranged alternately, for example, by 1 / 2 of the width of the first openings 111a in the row direction.

[0114] During winding, the first upper cover 110a1 may be bent in the column direction of the upper cover 110a, and stress may be applied to the first openings 111a so that they extend in the column direction. By increasing the width of the first openings 111a in the row direction, the third region A3 of the upper cover 110a may be easily wound or unwound, and the stress applied to the third region A3 may be alleviated. Thus, the third region A3 of the first upper cover 110a1 may be referred to as a ductile region.

[0115] However, the arrangement of the first openings 111a shown in Fig. 6a is merely an example and is not limited thereto. For example, the first openings 111a are shown to be dumbbell-shaped in Fig. 6a, but are not limited thereto, and the first openings 111a may be in various shapes such as polygonal, elliptical, etc.

[0116] The first upper cover 110a1 is formed of a material having rigidity, but at least a portion of the first upper cover 110a1 may have flexibility since it is wound or unwound together with the display panel 120. For example, the first upper cover 110a1 may be made of a material such as a metal material such as SUS (Steel Use Stainless) or Invar, or a material such as plastic. However, the material of the first upper cover 110a1 may be variously changed according to design as long as it satisfies physical property conditions such as thermal deformation amount, curvature radius, rigidity, etc., and is not limited thereto.

[0117] The second upper cover 110a2 is disposed on the rear surface of the first upper cover 110a1, and supports the display panel 120 and the first upper cover 110a1.

[0118] The second upper cover 110a2 may be disposed in a region corresponding to the first region A1 of the upper cover 110a in a size smaller than that of the first upper cover 110a1. For example, the length of the second upper cover 110a2 in the column direction may be smaller than the length of the first upper cover 110a1 in the column direction. Thus, the upper end of the second upper cover 110a2 may be disposed lower than the upper end of the first upper cover 110a1.

[0119] 6b, the second upper cover 110a2 includes a first fastening hole AH1 disposed in a region corresponding to the first region A1 of the upper cover 110a. The first fastening hole AH1 of the second upper cover 110a2 may be disposed in a region corresponding to a portion of the first fastening hole AH1 of the first upper cover 110a1. For example, the first fastening hole AH1 of the second upper cover 110a2 may be disposed only in a region corresponding to the first lower fastening hole AH1b of the first upper cover 110a1.

[0120] The first fastening holes AH1 of the second upper cover 110a2 may have a different shape from the first fastening holes AH1 of the first upper cover 110a1. For example, as shown in FIG. 6b, the first fastening holes AH1 of the second upper cover 110a2 may have a shape in which the width (size) in the up-down direction is longer than the width (size) in the left-right direction. That is, the first fastening holes AH1 may have a shape in which the width (size) in the direction in which the display panel 120 is wound is relatively longer. A detailed description of the first fastening holes AH1 of the second upper cover 110a2 will be provided below with reference to FIG. 7.

[0121] 6b, the first fastening holes AH1 of the second upper cover 110a2 are disposed only in areas corresponding to some of the first fastening holes AH1 of the first upper cover 110a1, but are not limited thereto, and the second upper cover 110a2 may include first fastening holes AH1 disposed in positions corresponding to a plurality of fastening members, and the first upper cover 110a1 may include first fastening holes AH1 corresponding to some of the plurality of fastening members. In this case, the first fastening holes AH1 of the first upper cover 110a1 may have a shape in which the width (size) in the vertical direction is longer than the width (size) in the horizontal direction.

[0122] Next, the second upper cover 110a2 includes a second fastening hole AH2 disposed in an area corresponding to the second area A2 of the upper cover 110a. In Fig. 6b, the second fastening hole AH2 of the second upper cover 110a2 may be a hole for fastening the lower cover 110b and the upper cover 110a to each other.

[0123] The second upper cover 110a2 includes a plurality of second ductile regions MA2 and a plurality of support regions PA between the plurality of second ductile regions MA2 in a region corresponding to the third region A3 of the upper cover 110a. That is, in a region corresponding to the third region A3 of the upper cover 110a, the plurality of second ductile regions MA2 and the plurality of support regions PA of the second upper cover 110a2 may be alternately arranged.

[0124] First, the second ductile region MA2 of the second upper cover 110a2 may include a plurality of second openings 111b. The shape of the plurality of second openings 111b may be the same as the shape of the first openings 111a of the first upper cover 110a1. That is, the size of each of the plurality of second openings 111b may be the same as the size of each of the plurality of first openings 111a. Here, the fact that the sizes of the second openings 111b and the first openings 111a are the same may mean that the area occupied by the second openings 111b on a plane is the same as the area occupied by one first opening 111a, but is not limited thereto.

[0125] In addition, the centers of the first openings 111a and the second openings 111b may coincide with each other. Therefore, the first openings 111a and the second openings 111b may completely overlap each other, and in the area where the first openings 111a and the second openings 111b overlap, an object placed on the back side of the second upper cover 110a2 may be visible on the front side of the first upper cover 110a1 through the first openings 111a and the second openings 111b. Thus, the first openings 111a and the second openings 111b may form an opening 111.

[0126] The second upper cover 110a2 has a plurality of support regions PA disposed between the plurality of second ductile regions MA2. The second upper cover 110a2 can support the first upper cover 110a1 disposed on the upper surface of the second upper cover 110a2 in front of the plurality of support regions PA.

[0127] The support regions PA do not have openings formed in the second ductile regions MA2, and the second openings 111b may overlap with some of the first openings 111a.

[0128] The plurality of support areas PA of the second upper cover 110a2 may overlap the first opening 111a of the first upper cover 110a1. In the area overlapping with the plurality of support areas PA of the second upper cover 110a2, the support areas of the second upper cover 110a2 may be exposed in a shape corresponding to the first opening 111a of the first upper cover 110a1.

[0129] The second upper cover 110a2 is formed of a material having rigidity similar to the first upper cover 110a1, but may have flexibility since it is wound or unwound together with the display panel 120. For example, the second upper cover 110a2 may be made of a metal material such as SUS (Steel Use Stainless) or Invar, or a material such as plastic, but is not limited thereto.

[0130] 6c, the first upper cover 110a1 includes a plurality of protrusions 110a11 and a plurality of recesses 110a12. The plurality of protrusions 110a11 and the plurality of recesses 110a12 may be arranged in a row direction. The protrusions 110a11 of the first upper cover 110a1 are arranged to protrude in a direction in which the second upper cover 110a2 is arranged between the plurality of recesses 110a12.

[0131] 6c, the second upper cover 110a2 includes a plurality of protrusions 110a21 and a plurality of recesses 110a22. The plurality of protrusions 110a21 and the plurality of recesses 110a22 of the second upper cover 110a2 may be arranged in a row direction. The plurality of protrusions 110a21 of the second upper cover 110a2 are arranged to protrude in the direction in which the first upper cover 110a1 is arranged between the plurality of recesses 110a22.

[0132] At this time, the plurality of recesses 110a22 and the plurality of protrusions 110a21 of the second upper cover 110a2 may be arranged so as to be misaligned with the plurality of recesses 110a12 and the plurality of protrusions 110a11 of the first upper cover 110a1. Also, the width of the plurality of recesses 110a22 of the second upper cover 110a2 may be greater than the width of the plurality of protrusions 110a11 of the first upper cover 110a1, and the width of the plurality of recesses 110a12 of the first upper cover 110a1 may be greater than the width of the plurality of protrusions 110a21 of the second upper cover 110a2. Thus, the plurality of recesses 110a12 and the plurality of protrusions 110a11 of the first upper cover 110a1 are arranged so as to engage with the plurality of recesses 110a22 and the plurality of protrusions 110a21 of the second upper cover 110a2.

[0133] The difference in width between the multiple corresponding recesses 110a12 of the first upper cover 110a1 and the multiple protrusions 110a21 of the second upper cover 110a2, and the difference in width between the multiple corresponding recesses 110a22 of the second upper cover 110a2 and the multiple protrusions 110a11 of the first upper cover 110a1 may increase from the lower side of the upper cover 110a adjacent to the roller 161 to the upper side of the upper cover 110a.

[0134] In the following, reference will be made to FIG. 7 to provide a more detailed explanation of the fastening structure between the recess 110a12 and the protrusion 110a11 of the first upper cover 110a1 and the recess 110a22 and the protrusion 110a21 of the second upper cover 110a2, and the head bar 172.

[0135] 7 is a schematic cross-sectional view illustrating a head bar and a display panel of a display device according to an embodiment of the present invention. In FIG. 7, only the head bar 172, the display panel 120, the upper cover 110a, the lower cover 110b, the top cover 151, the flexible film 130, and the printed circuit board 140 are shown. For convenience of illustration, the recess 110a12 and the protrusion 110a11 of the first upper cover 110a1 and the recess 110a22 and the protrusion 110a21 of the second upper cover 110a2 are not shown in FIG.

[0136] The top cover 151 is disposed on one surface of the upper cover 110a. The top cover 151 is disposed to cover the pad area of ​​the display panel 120, the flexible films 130, and the printed circuit board 140, and can protect the pad area of ​​the display panel 120, the flexible films 130, and the printed circuit board 140.

[0137] The top cover 151 is made of a material having rigidity, and is not deformed when the display unit DP is wound, and can protect the pad area at one end of the display panel 120 and the flexible films 130.

[0138] The outer surface of the top cover 151 may be convex and connected to the curved portion 161R of the roller 161 to form a rounded shape, or connected to the curved portion 161R of the roller to form a circular shape. That is, one surface of the top cover 151 may be curved. Then, when the display panel 120 is wound, the top cover 151 may be connected to the curved portion 161R of the roller 161 to form a rounded shape, or connected to the curved portion 161R of the roller to form a circular shape.

[0139] 7, the head bar 172 includes a first head bar 172a and a second head bar 172b. The second head bar 172b covers the front surface of the display panel 120. The second head bar 172b may cover only a portion of the front surface adjacent to the top edge of the display panel 120 so as not to block the image displayed on the front surface of the display panel 120.

[0140] 7, a bottom cover 152 may be disposed on the display panel 120. The bottom cover 152, together with the top cover 151, may protect the pad area of ​​the display panel 120, the flexible films 130, and the printed circuit board 140. 7, the display device 100 is wound in an inward manner in which the display surface of the display panel 120 faces the rollers 161. That is, when the display panel 120 is wound around the rollers 161, the display panel 120 out of the display panel 120 and the upper cover 110a may be disposed closer to the rollers 161, and the viewing direction may be a direction in which the display panel 120 is viewed from the bottom cover 152 side rather than the top cover 151 side, as shown in FIG.

[0141] Also, referring to FIG. 6c, the multiple convex portions 110a21 of the second upper cover 110a2 are positioned closer to the convex portions 110a11 of the first upper cover 110a1 above the multiple concave portions 110a12 of the first upper cover 110a1 than the convex portions 110a11 of the first upper cover 110a1 below the multiple concave portions 110a12 of the first upper cover 110a1.

[0142] As described above, when the display device 100 is wound in the inward manner, the first upper cover 110a1 is wound closer to the roller 161 than the second upper cover 110a2, and is therefore wound with a smaller radius of curvature. Thus, the first upper cover 110a1 may have a relatively smaller slippage than the second upper cover 110a2, and may have a smaller positional variation than the positional variation of the second upper cover 110a2. That is, during winding, the upper end of the second upper cover 110a2 may move further downward than the upper end of the first upper cover 110a1. Thus, the plurality of convex portions 110a21 of the second upper cover 110a2 may move further downward of the plurality of concave portions 110a12 of the first upper cover 110a1. Therefore, the separation distances d1, d2, ..., dn-1, dn between the convex portion 110a21 of the second upper cover 110a2 and the convex portion 110a11 of the first upper cover 110a1 can be secured to accommodate slippage of the convex portion 110a21 of the second upper cover 110a2.

[0143] 6c, the distances d1, d2, ..., dn-1, dn between the convex portion 110a21 of the second upper cover 110a2 and the convex portion 110a11 of the first upper cover 110a1 may increase as the distance from the roller 161 increases. Referring to FIG. 6c, the convex portion 110a11 of the first upper cover 110a1 is spaced apart from the convex portion 110a21 of the second upper cover 110a2 at a certain distance under the upper cover 110a adjacent to the roller 161. The distance d1 between the convex portion 110a21 of the second upper cover 110a2 and the convex portion 110a11 of the first upper cover 110a1 may correspond to, for example, an assembly tolerance. Therefore, even if a process error occurs, the second upper cover 110a2 can be assembled to be engaged with the first upper cover 110a1 without being separated. Meanwhile, the separation distance dn between the convex portion 110a21 of the second upper cover 110a2 and the convex portion 110a11 of the first upper cover 110a1 at the upper side of the upper cover 110a disposed far from the roller 161 may be larger than the distances dn, dn2, ..., dn-1 between the convex portion 110a21 of the second upper cover 110a2 and the convex portion 110a11 of the first upper cover 110a1 at the lower side of the upper cover 110a. That is, the separation distances dn, dn2, ..., dn-1 between the convex portion 110a21 of the second upper cover 110a2 and the convex portion 110a11 of the first upper cover 110a1 may increase from the roller 161 side toward the head bar 172 side. Therefore, the separation distance dn, dn2, ..., dn-1 between the convex portion 110a21 of the second upper cover 110a2 and the convex portion 110a11 of the first upper cover 110a1 can be increased on the upper side of the upper cover 110a where the radius between the roller 161 and the display panel 120 increases to accommodate slippage of the second upper cover 110a2.

[0144] Meanwhile, the first openings 111a may be arranged in both the plurality of protrusions 110a11 and the plurality of recesses 110a12 of the first upper cover 110a1. Thus, both the plurality of protrusions 110a11 and the plurality of recesses 110a12 of the first upper cover 110a1 may be the first ductile region MA1.

[0145] In contrast, the second opening 111b of the second upper cover 110a2 may be disposed in one region of the plurality of recesses 110a22 or the plurality of protrusions 110a21 of the second upper cover 110a2, or may be disposed in both a partial region of the plurality of recesses 110a22 and a partial region of the plurality of protrusions 110a21. Thus, the plurality of recesses 110a22 and the plurality of protrusions 110a21 of the second upper cover 110a2 may correspond to the second ductile region MA2 and the support region PA of the second upper cover 110a2, respectively, but are not limited thereto, and the plurality of recesses 110a22 and the plurality of protrusions 110a21 of the second upper cover 110a2 may correspond to a partial region of the support region PA or a partial region of the second ductile region MA2. That is, the position of the second opening 111b of the second upper cover 110a2 can be designed independently of the positions of the plurality of recesses 110a22 and the plurality of protrusions 110a21 of the second upper cover 110a2.

[0146] 6 a and 7 , the head bar 172 is disposed at the top edge of the display panel 120 so as to surround the front and rear sides of the display panel 120 .

[0147] A first fastening hole AH1 and a fastening member SC penetrating the head bar 172 and the first fastening hole AH1 are disposed in the uppermost region of the upper cover 110a for fastening to the head bar 172. Thus, when the link part 171 fastened to the head bar 172 rises or falls, the upper cover 110a and the display panel 120 attached to the upper cover 110a can also rise or fall together.

[0148] First, referring to FIG. 6a and FIG. 7, the first fastening holes AH1 of the first upper cover 110a1 include first upper fastening holes AH1a arranged in a first row and first lower fastening holes AH1b arranged in a second row.

[0149] The first fastening holes AH1 of the first upper cover 110a1 are arranged at positions corresponding to the fastening members SC and are sized to correspond to the fastening members SC. Thus, the first upper cover 110a1 is fixed to the head bar 172 by the fastening members SC, and when the link part 171 rises or falls, the end of the first upper cover 110a1 can rise or fall together with the head bar 172.

[0150] 6b and 7, the first fastening holes AH1 of the second upper cover 110a2 are disposed at positions corresponding to some of the fastening members SC, and may have a shape in which the vertical width (size) is longer than the horizontal width (size). In this case, as shown in FIG. 7, when the display panel 120 is fully unwound, the multiple fastening members SC are disposed adjacent to the lower side of the first fastening holes AH1 of the second upper cover 110a2.

[0151] Meanwhile, since the first upper cover 110a1 is wound adjacent to the roller 161 by the second upper cover 110a2, a relatively small slip occurs in the first upper cover 110a1 compared to the second upper cover 110a2. Thus, during winding, the upper end of the second upper cover 110a2 may move further downward than the upper end of the first upper cover 110a1. Therefore, the first fastening holes AH1 of the second upper cover 110a2 are formed long in the vertical direction so that the fastening members SC can move to the upper side of the first fastening holes AH1 of the second upper cover 110a2 during the winding of the display panel 120, and the movement of the multiple fastening members SC can be accommodated during winding.

[0152] 7, the upper end and side of the second upper cover 110a2 are spaced apart from the head bar 172. As described above, slippage occurs in the second upper cover 110a2 during the process of winding or unwinding the display panel 120, so by spaced apart the upper end of the second upper cover 110a2 from the head bar 172, friction that occurs during slippage can be prevented.

[0153] A plurality of openings are disposed in an upper cover supporting the display panel in order to minimize slippage of the display panel and reduce stress applied to the display panel when the display panel is wound or unwound. However, the time and cost required for a process of forming the openings in the upper cover may increase depending on the thickness of the upper cover. For example, when the openings in the upper cover are formed by an etching process, the time and cost of the etching process may increase as the thickness of the upper cover increases. In addition, when the openings are formed by an etching process, the area of ​​the openings to be etched may increase as the thickness of the upper cover increases. As a result, the area of ​​the openings in the upper cover increases, which may cause problems such as the openings being visible to a user, and process deviations may occur depending on the etching direction.

[0154] A typical polarizing plate includes a polyvinyl alcohol (PVA) polymer film as a polarizing layer to polarize incident light. However, since polyvinyl alcohol (PVA) polymer materials are made of highly hygroscopic materials, their volume changes depending on the humidity. That is, the polarizing layer absorbs moisture and expands in a high humidity environment, and contracts as moisture is released in a low humidity environment, causing warping in the stretching direction, which in turn causes warping in the polarizing plate and the display panel to which the polarizing plate is attached.

[0155] In the display device 100 according to an embodiment of the present invention, the upper cover 110a is composed of a first upper cover 110a1 and a second upper cover 110a2 each having a thin thickness. Therefore, the first opening 111a of the first upper cover 110a1 and the second opening 111b of the second upper cover 110a2 can be formed in independent processes. Therefore, the time required for performing an etching process to form the first opening 111a in the first upper cover 110a1 and the time required for performing an etching process to form the second opening 111b in the second upper cover 110a2 can be shorter than the time required for performing an etching process to form an opening in the entire single upper cover having a thickness equal to the sum of the thickness of the first upper cover 110a1 and the thickness of the second upper cover 110a2. In addition, compared to forming an opening in a single upper cover having a thickness equal to the sum of the thicknesses of the first and second upper covers 110a1 and 110a2, a smaller opening 111 can be formed in the first and second upper covers 110a1 and 110a2. Therefore, in the display device 100 according to an embodiment of the present invention, the first opening 111a of the first upper cover 110a1 and the second opening 111b of the second upper cover 110a2 are formed in separate processes, so that the area of ​​the opening 111 can be minimized without reducing the thickness of the final upper cover 110a. Therefore, the problem of the opening 111 being visible to the user can be solved while maintaining the rigidity of the display device 100.

[0156] In addition, the second upper cover 110a2 of the display device 100 according to an embodiment of the present invention includes a plurality of support regions PA disposed between a plurality of second ductile regions MA2. Thus, the front surface of the upper cover can have a higher rigidity than when the front surface of the upper cover is configured with a ductile region including an opening. Furthermore, when the upper cover 110a is configured with a plurality of covers that mesh with each other, the upper cover 110a can have a higher rigidity relative to its thickness than when the upper cover 110a is configured with a single cover. Thus, in the display device 100 according to an embodiment of the present invention, the warping of the display device 100 that may occur due to the expansion of the polarizing plate can be improved while preventing the opening 111 from being visible.

[0157] In addition, in the display device 100 according to one embodiment of the present invention, the difference between the width of the corresponding recesses 110a12 of the first upper cover 110a1 and the width of the corresponding protrusions 110a21 of the second upper cover 110a2, and the difference between the width of the corresponding recesses 110a22 of the second upper cover 110a2 and the width of the corresponding protrusions 110a11 of the first upper cover 110a1 are arranged to increase from the lower side of the upper cover 110a adjacent to the roller 161 to the upper side of the upper cover 110a. In addition, in the display device 100 according to an embodiment of the present invention, when the display panel 120 is wound around the rollers 161, the plurality of convex portions 110a21 of the second upper cover 110a2 are arranged closer to the convex portions 110a11 of the first upper cover 110a1 above the plurality of concave portions 110a12 of the first upper cover 110a1 than the convex portions 110a11 of the first upper cover 110a1 below the plurality of concave portions 110a12 of the first upper cover 110a1. Thus, the movement of the plurality of convex portions 110a21 of the second upper cover 110a2 due to the slippage of the second upper cover 110a2 can be accommodated. Therefore, in the display device 100 according to an embodiment of the present invention, the problem of the display panel 120 lifting up or the occurrence of wrinkles in the display panel 120 can be reduced.

[0158] 8 is a schematic cross-sectional view of an upper cover of a display device according to another embodiment of the present invention. The upper cover 810a of the display device 800 of FIG. 8 is substantially the same as the upper cover 110a of the display device 100 of FIG. 1 to FIG. 7 except that the second upper cover 810a2 has a plurality of protrusions 810a21 and a plurality of recesses 810a22, and the other configurations are substantially the same, so that a duplicated description will be omitted. For convenience of illustration, FIG. 8 shows only the upper cover 810a among various components of the display device 800.

[0159] 8, the second upper cover 810a2 includes a plurality of protrusions 810a21 and a plurality of recesses 810a22. The plurality of protrusions 810a21 and the plurality of recesses 810a22 are arranged to mate with the plurality of recesses 110a12 and the plurality of protrusions 110a11 of the first upper cover 110a1, respectively.

[0160] Meanwhile, in the display device 800 according to another embodiment of the present invention, the display surface of the display panel 120 is wound in an outward manner toward the rollers 161. That is, in addition to the case where the display panel 120 is wound so as not to face the rollers 161, the upper cover 810a of the display panel 120 and the upper cover 810a may be disposed closer to the rollers 161.

[0161] 8, the plurality of convex portions 810a21 of the second upper cover 810a2 are disposed closer to the convex portions 110a11 of the first upper cover 110a1 below the plurality of concave portions 110a12 of the first upper cover 110a1 than the convex portions 110a11 of the first upper cover 110a1 above the plurality of concave portions 110a12 of the first upper cover 110a1. As described above, when the display device 800 is wound in the outward manner, the first upper cover 110a1 is wound with a larger radius of curvature than the second upper cover 810a2 wound adjacent to the roller 161. Thus, during winding, the upper end of the first upper cover 110a1 moves further downward than the upper end of the second upper cover 810a2, and the plurality of convex portions 110a11 of the first upper cover 110a1 may move further downward of the plurality of concave portions 810a22 of the second upper cover 810a2. Therefore, the separation distances d1, d2, ..., dn-1, dn between the convex portions 810a21 of the second upper cover 810a2 and the convex portions 110a11 of the first upper cover 110a1 can be secured to accommodate slippage of the convex portions 110a11 of the first upper cover 110a1.

[0162] 8, the distances d1, d2, ..., dn-1, dn between the convex portion 810a21 of the second upper cover 810a2 and the convex portion 110a11 of the first upper cover 110a1 may increase as they are farther away from the roller 161. That is, the difference between the width of the corresponding recesses 110a12 of the first upper cover 110a1 and the width of the corresponding convex portions 810a21 of the second upper cover 810a2 and the difference between the width of the corresponding recesses 810a22 of the second upper cover 810a2 and the width of the corresponding convex portions 110a11 of the first upper cover 110a1 may increase from the lower side of the upper cover 810a adjacent to the roller 161 to the upper side of the upper cover 810a. Thus, the slip of the first upper cover 110a1, which increases at the upper side of the upper cover 810a due to the increase in the radius between the roller 161 and the display panel 120, may be accommodated.

[0163] Meanwhile, the first fastening holes AH1 of the second upper cover 810a2 may have a shape in which the width (size) in the vertical direction is longer than the width (size) in the horizontal direction. In this case, when the display panel 120 is fully unwound, the multiple fastening members SC are disposed adjacent to the upper side of the first fastening holes AH1 of the second upper cover 810a2. Thus, the first fastening holes AH1 of the second upper cover 810a2 can accommodate the movement of the fastening members SC moving in the upward direction during the process in which the display panel 120 is wound in the outward manner.

[0164] Meanwhile, the second upper cover 810a2 includes a plurality of second openings 111b having the same shape as the first openings 111a of the first upper cover 110a1. The arrangement positions of the second openings 111b of the second upper cover 810a2 can be designed independently of the arrangement of the plurality of recesses 810a22 and the plurality of protrusions 810a21 of the second upper cover 810a2.

[0165] In a display device 800 according to another embodiment of the present invention, an upper cover 810a is configured to include a first upper cover 110a1 and a second upper cover 810a2 each having a thin thickness, and the first upper cover 110a1 and the second upper cover 810a2 are configured to be interlocked with each other. As a result, compared to a case where a single cover is used, the upper cover 810a has high rigidity relative to its thickness, and warping of the display device 800 that may occur due to expansion of the polarizing plate can be improved.

[0166] In addition, in the display device 800 according to another embodiment of the present invention, the first opening 111a of the first upper cover 110a1 and the second opening 111b of the second upper cover 810a2 are formed in separate processes, so that the areas of the first opening 111a and the second opening 111b can be minimized. Therefore, the problem of the opening 111 being visible to the user can be solved while maintaining the rigidity of the display device 800.

[0167] In addition, in the display device 800 according to another embodiment of the present invention, the difference between the width of the plurality of corresponding recesses 110a12 of the first upper cover 110a1 and the width of the plurality of corresponding protrusions 810a21 of the second upper cover 810a2 and the difference between the width of the plurality of corresponding recesses 810a22 of the second upper cover 810a2 and the width of the plurality of corresponding protrusions 110a11 of the first upper cover 110a1 are arranged to increase from the lower side of the upper cover 810a adjacent to the roller 161 to the upper side of the upper cover 810a. Therefore, when the display device 800 is wound in an outward manner, the problem of the display panel 120 lifting up or the occurrence of wrinkles in the display panel 120 can be reduced by accepting the movement of the plurality of protrusions 110a11 of the first upper cover 110a1 that increases at the upper side of the upper cover 810a.

[0168] 9 is a schematic cross-sectional view of an upper cover of a display device according to another embodiment of the present invention. The upper cover 910a of the display device 900 of FIG. 9 is substantially the same as the upper cover 110a of the display device 100 of FIG. 1 to FIG. 7 except that the second upper cover 910a2 has a plurality of protrusions 910a21 and a plurality of recesses 910a22, and therefore the other configurations are substantially the same. For convenience of illustration, only the upper cover 910a of the various components of the display device 900 is shown in FIG. 9.

[0169] 9, the second upper cover 910a2 includes a plurality of protrusions 910a21 and a plurality of recesses 910a22. The plurality of protrusions 910a21 and the plurality of recesses 910a22 of the second upper cover 910a2 are arranged to mate with the plurality of recesses 110a12 and the plurality of protrusions 110a11 of the first upper cover 110a1, respectively.

[0170] Meanwhile, the display device 900 according to another embodiment of the present invention may be wound in an outward manner in which the display surface of the display panel 120 faces the rollers 161, or may be wound in an inward manner. Therefore, when the display panel 120 is wound around the rollers 161, the upper cover 910a of the display panel 120 and the upper cover 910a may be disposed closer to the rollers 161, and the display panel 120 may be disposed closer to the rollers 161.

[0171] Referring to FIG. 9, the distances d1', d2', ..., dn-1', dn' between the multiple protrusions 910a21 of the second upper cover 910a2 and the protrusions 110a11 of the first upper cover 110a1 below the multiple recesses 110a12 of the first upper cover 110a1 are the same as the distances d1, d2, ..., dn-1, dn between the multiple protrusions 910a21 of the second upper cover 910a2 and the protrusions 110a11 of the first upper cover 110a1 above the multiple recesses 110a12 of the first upper cover 110a1.

[0172] Therefore, when the display device 900 is wound in an outward manner, the first upper cover 110a1 is wound with a larger radius of curvature than the second upper cover 910a2 wound adjacent to the roller 161, so that the plurality of convex portions 110a11 of the first upper cover 110a1 may further move downwardly toward the plurality of concave portions 910a22 of the second upper cover 910a2. Also, when the display device 900 is wound in an inward manner, the second upper cover 910a2 is wound with a larger radius of curvature than the first upper cover 110a1 wound adjacent to the roller 161, so that the plurality of convex portions 910a21 of the second upper cover 910a2 may further move downwardly toward the plurality of concave portions 110a12 of the first upper cover 110a1. Therefore, the separation distances d1', d2', ..., dn-1', dn' between the convex portion 910a21 of the second upper cover 910a2 and the convex portion 110a11 of the first upper cover 110a1 are positioned and secured not only above the convex portion 910a21 of the second upper cover 910a2 but also below the convex portion 910a21 of the second upper cover 910a2, thereby accommodating slippage of the convex portion 110a11 of the first upper cover 110a1 or the convex portion 910a21 of the second upper cover 910a2.

[0173] 9, the distances d1, d1', d2, d2', ..., dn-1, dn-1', dn, dn' between the convex portion 910a21 of the second upper cover 910a2 and the convex portion 110a11 of the first upper cover 110a1 may increase as they are farther away from the roller 161. Thus, it is possible to accommodate the slippage of the first upper cover 110a1 or the slippage of the second upper cover 910a2, which increases with an increase in the radius between the roller 161 and the display panel 120.

[0174] In a display device 900 according to another embodiment of the present invention, an upper cover 910a is configured to include a first upper cover 110a1 and a second upper cover 910a2 each having a thin thickness, and the first upper cover 110a1 and the second upper cover 910a2 are configured to be interlocked with each other. As a result, compared to a display device configured with a single cover, the display device 900 can have high rigidity relative to its thickness, and warping of the display device 900 that may occur due to expansion of a polarizing plate can be improved.

[0175] In addition, in the display device 900 according to still another embodiment of the present invention, the first opening 111a of the first upper cover 110a1 and the second opening 111b of the second upper cover 910a2 are formed in separate processes, thereby minimizing the areas of the first opening 111a and the second opening 111b. Therefore, the problem of the opening 111 being visible to a user can be solved while maintaining the rigidity of the display device 900.

[0176] In addition, in a display device 900 according to another embodiment of the present invention, the difference between the width of the multiple corresponding recesses 110a12 of the first upper cover 110a1 and the width of the multiple corresponding protrusions 910a21 of the second upper cover 910a2, and the difference between the width of the multiple corresponding recesses 910a22 of the second upper cover 910a2 and the width of the multiple protrusions 110a11 of the first upper cover 110a1 are arranged to increase from the lower side of the upper cover 910a adjacent to the roller 161 to the upper side of the upper cover 910a. In addition, the separation distances d1', d2', ..., dn-1', dn' between the multiple protrusions 910a21 of the second upper cover 910a2 and the protrusions 110a11 of the first upper cover 110a1 below the multiple recesses 110a12 of the first upper cover 110a1 are arranged to be the same as the separation distances d1, d2, ..., dn-1, dn between the multiple protrusions 910a21 of the second upper cover 910a2 and the protrusions 110a11 of the first upper cover 110a1 above the multiple recesses 110a12 of the first upper cover 110a1. Therefore, when the display device 900 is wound in an inward manner, it can accommodate the movement of multiple convex portions 910a21 of the second upper cover 910a2 that increase on the upper side of the upper cover 910a, and when the display device 900 is wound in an outward manner, it can accommodate the movement of multiple convex portions 110a11 of the first upper cover 110a1, reducing the problem of the display panel 120 lifting up or wrinkles occurring on the display panel 120.

[0177] FIG. 10a is a plan view of a first upper cover of a display device according to another embodiment of the present invention. FIG. 10b is a plan view of a second upper cover of a display device according to another embodiment of the present invention. FIG. 10c is a schematic plan view of an upper cover of a display device according to another embodiment of the present invention. FIG. 10d is a schematic cross-sectional view of an upper cover of a display device according to another embodiment of the present invention. The upper cover 1010a of the display device 1000 according to another embodiment of the present invention is substantially the same as the upper cover 110a of the display device 100 of FIGS. 1 to 7 except that only the third region A3 of the first upper cover 1010a1 and the third region A3 of the second upper cover 1010a2 are different, and therefore, repeated description will be omitted. In FIGS. 10a to 10d, only the upper cover 1010a is shown among various components of the display device 1000 for convenience of illustration.

[0178] Referring to FIG. 10a, a first upper cover 1010a1 includes a first area A1, a second area A2, and a third area A3.

[0179] The third region A3 of the first upper cover 1010a1 includes a first ductile region MA1. The first ductile region MA1 of the first upper cover 1010a1 includes a plurality of first openings 1011a.

[0180] Referring to FIG. 10b, the second top cover 1010a2 includes a first area A1, a second area A2, and a third area A3.

[0181] The second top cover 1010a2 includes a plurality of second ductile regions MA2 in the third region A3 and a plurality of support regions PA between the plurality of second ductile regions MA2.

[0182] The second ductile region MA2 of the second upper cover 1010a2 includes a plurality of second openings 1011b. The second ductile region MA2 of the second upper cover 1010a2 is disposed in the first upper cover 1010a1 so as to correspond to another part of the first ductile region MA1 of the first upper cover 1010a1 that does not overlap with the plurality of support regions PA of the second upper cover 1010a2. In this case, the first opening 1011a and the second opening 1011b may completely overlap each other, and an object disposed on the back side of the second upper cover 1010a2 may be viewed on the front surface of the first upper cover 1010a1 through the first opening 1011a and the second opening 1011b in the second ductile region MA2 of the second upper cover 1010a2.

[0183] The multiple support regions PA of the second upper cover 1010a2 are disposed to correspond to some of the multiple first ductile regions MA1 of the first upper cover 1010a1.

[0184] 10c and 10d, a plurality of protruding patterns 1013 may be arranged in the plurality of supporting areas PA. The plurality of protruding patterns 1013 are arranged to protrude in a direction in which the first upper cover 1010a1 is arranged. The plurality of protruding patterns 1013 may have the same shape as the first openings 1011a of the first upper cover 1010a1. Meanwhile, the size of the plurality of protruding patterns 1013 may be smaller than the size of the plurality of first openings 1011a.

[0185] 10c and 10d, the plurality of protruding patterns 1013 are disposed at positions corresponding to the plurality of first openings 1011a of the first upper cover 1010a1. Thus, the plurality of protruding patterns 1013 may be inserted into the plurality of first openings 1011a. Thus, as shown in FIG. 10c, the upper surface of the plurality of protruding patterns 1013 of the second upper cover 1010a2 may be viewed through the plurality of first openings 1011a in the first ductile region MA1 of the first upper cover 1010a1.

[0186] Meanwhile, the first upper cover 1010a1 and the second upper cover 1010a2 each include a plurality of recesses 1010a12, 1010a22 and a plurality of protrusions 1010a11, 1010a21, and the plurality of recesses 1010a12 and the plurality of protrusions 1010a11 of the first upper cover 1010a1 can be arranged to engage with the plurality of recesses 1010a22 and the plurality of protrusions 1010a21 of the second upper cover 1010a2.

[0187] In the display device 1000 according to another embodiment of the present invention, the upper cover 1010a is composed of a first upper cover 1010a1 and a second upper cover 1010a2 having a thin thickness, and the first upper cover 1010a1 and the second upper cover 1010a2 are configured to be interlocked with each other. Therefore, compared to a case where a single cover is used, the upper cover 1010a has high rigidity relative to its thickness, and warping of the display device 1000 that may occur due to expansion of the polarizing plate can be improved.

[0188] In addition, in the display device 1000 according to another embodiment of the present invention, the first opening 1011a of the first upper cover 1010a1 and the second opening 1011b of the second upper cover 1010a2 are formed in separate processes, thereby minimizing the areas of the first opening 1011a and the second opening 1011b. Therefore, the problem of the first opening 1011a and the second opening 1011b being visible to the user can be solved while maintaining the rigidity of the display device 1000.

[0189] In addition, in the display device 1000 according to another embodiment of the present invention, a plurality of protruding patterns 1013 are disposed in the support area PA of the second upper cover 1010a2. Thus, the plurality of protruding patterns 1013 of the second upper cover 1010a2 are inserted into the plurality of first openings 1011a of the first upper cover 1010a1, so that the bonding force between the first upper cover 1010a1 and the second upper cover 1010a2 is strengthened, and the rigidity of the entire upper cover 1010a can be improved. In addition, the plurality of protruding patterns 1013 are disposed in a form in which they protrude in a direction in which the plurality of first openings 1011a are disposed, filling the plurality of first openings 1011a. At this time, the size of the plurality of protruding patterns 1013 may be smaller than the size of the plurality of first openings 1011a. Thus, the plurality of first openings 1011a can be prevented from being viewed from the front surface of the upper cover 1010a and the display panel 120, and the flatness of the upper cover 1010a can be improved.

[0190] FIG. 11a is a plan view of a first upper cover of a display device according to another embodiment of the present invention. FIG. 11b is a plan view of a second upper cover of a display device according to another embodiment of the present invention. FIG. 11c is a schematic plan view of an upper cover of a display device according to another embodiment of the present invention. FIG. 11d is a schematic cross-sectional view of an upper cover of a display device according to another embodiment of the present invention. The upper cover 1110a of the display device 1100 according to another embodiment of the present invention is substantially the same as the upper cover 110a of the display device 100 of FIGS. 1 to 7 except that only the third region A3 of the first upper cover 1110a1 and the third region A3 of the second upper cover 1110a2 are different, and therefore, repeated description will be omitted. In FIGS. 11a to 11d, only the upper cover 1110a is shown among various components of the display device 1100 for convenience of illustration.

[0191] The first upper cover 1110a1 includes a plurality of first ductile regions MA1 disposed in the third region A3 and a plurality of first support regions PA1 between the plurality of first ductile regions MA1.

[0192] The first ductile region MA1 of the first top cover 1110a1 includes a plurality of first openings 1111a.

[0193] The first support regions PA1 do not have the first openings 1111a formed in the first ductile regions MA1.

[0194] The second upper cover 1110a2 includes a plurality of second ductile regions MA2 disposed in the third region A3 and a plurality of second support regions PA2 between the plurality of second ductile regions MA2.

[0195] The second ductile region MA2 of the second upper cover 1110a2 is disposed to correspond to (eg, overlap) the multiple first support regions PA1 of the first upper cover 1110a1.

[0196] A plurality of second openings 1111b are disposed in the plurality of second ductile regions MA2 of the second upper cover 1110a2. The plurality of second openings 1111b may have the same shape as the first openings 1111a of the first upper cover 1110a1, but are not limited thereto.

[0197] The multiple second support regions PA2 of the second upper cover 1110a2 are disposed to correspond to (eg, overlap) the multiple first ductile regions MA1 of the first upper cover 1110a1.

[0198] The second upper cover 1110a2 does not have a plurality of second openings 1111b formed in the second ductile region MA2 in the second support region PA2. Therefore, the second upper cover 1110a2 can support the first upper cover 1110a1 disposed in front of the second upper cover 1110a2 in the second support region PA2.

[0199] 11b to 11d, a plurality of protruding patterns 1113 are disposed in a plurality of second support areas PA2 of the second upper cover 1110a2. The protruding patterns 1113 of the second upper cover 1110a2 may be disposed to protrude by the thickness of the first upper cover 1110a1.

[0200] The protruding pattern 1113 of the second upper cover 1110a2 may have the same shape as the first opening 1111a, and the protruding pattern 1113 of the second upper cover 1110a2 may have the same size as the first opening 1111a of the first upper cover 1110a1.

[0201] 11d, the protruding patterns 1113 may be inserted into the first openings 1111a of the first upper cover 1110a1. Then, as shown in FIG. 11c, the protruding patterns 1113 of the second upper cover 1110a2 may be exposed through the first openings 1111a of the first upper cover 1110a1 in an area overlapping with the second support areas PA2 of the second upper cover 1110a2. At this time, the protruding patterns 1113 may fill the first openings 1111a of the first upper cover 1110a1 without any space therebetween.

[0202] 11c and 11d, the second opening 1111b of the second upper cover 1110a2 may be supported by the first support areas PA1 of the first upper cover 1110a1, and therefore the second opening 1111b may not be visible from the front surface of the upper cover 1110a.

[0203] In a display device 1100 according to another embodiment of the present invention, an upper cover 1110a is configured to include a first upper cover 1110a1 and a second upper cover 1110a2 each having a thin thickness, and the first upper cover 1110a1 and the second upper cover 1110a2 are configured to be interlocked with each other. As a result, compared to a display device configured with a single cover, the display device 1100 can have high rigidity relative to its thickness, and warping of the display device 1100 that may occur due to expansion of a polarizing plate can be improved.

[0204] In addition, in the display device 1100 according to another embodiment of the present invention, the first opening 1111a of the first upper cover 1110a1 and the second opening 1111b of the second upper cover 1110a2 are formed in separate processes, thereby minimizing the areas of the first opening 1111a and the second opening 1111b. Therefore, the problem of the first opening 1111a and the second opening 1111b being visible to the user can be solved while maintaining the rigidity of the display device 1100.

[0205] In addition, in a display device 1110 according to still another embodiment of the present invention, a protruding pattern 1113 is disposed in the second support area PA2 of the second upper cover 1110a2. Thus, the protruding pattern 1113 of the second upper cover 1110a2 is inserted into the first opening 1111a of the first upper cover 1110a1, thereby strengthening the bonding force between the first upper cover 1110a1 and the second upper cover 1110a2, and improving the rigidity of the entire upper cover 1110a.

[0206] In addition, in the display device 1110 according to another embodiment of the present invention, the size of the plurality of protruding patterns 1113 of the second upper cover 1110a2 may be the same as the size of the plurality of first openings 1111a. Thus, the plurality of protruding patterns 1113 fill the plurality of first openings 1111a without any space between them, so that the front surface of the upper cover 1110a may be recognized as flat without any opening area. Thus, the flatness of the upper cover 1110a may be improved, and the plurality of first openings 1111a may be prevented from being viewed from the front surface of the upper cover 1110a and the display panel 120. Meanwhile, the upper surface of the protruding patterns 1113 may contact the display panel 120 through the first openings 1111a. Thus, the front surface of the upper cover 1110a may contact the display panel 120. Thus, the adhesion area between the display panel 120 and the upper cover 1110a is increased, and peeling between the display panel 120 and the upper cover 1110a may be prevented.

[0207] 12 is a schematic cross-sectional view of a second upper cover of a display device according to another embodiment of the present invention. The upper cover of the display device 1200 according to another embodiment of the present invention is substantially the same as the upper cover 110a of the display device 100 of FIGS. 1 to 7 except that a friction reduction layer 1280 is added, so that a duplicated description will be omitted. In FIG. 12, for convenience of illustration, only the second upper cover 110a2 and the friction reduction layer 1280 are shown among various components of the display device 1200.

[0208] The friction reduction layer 1280 may be disposed on at least one of the surfaces of the first upper cover 110a1 and the second upper cover 110a2 that face each other. For example, as shown in FIG 12, the friction reduction layer 1280 may be disposed on one surface of the second upper cover 110a2, and the friction reduction layer 1280 may be disposed on one surface of the first upper cover 110a1. The friction reduction layer 1280 may be made of a material with a low coefficient of friction. For example, the friction reduction layer 1280 may be made of a material such as, but not limited to, Teflon. Thus, the friction reduction layer 1280 may reduce the horizontal friction force between the first upper cover 110a1 and the second upper cover 110a2.

[0209] 12, a magnet may be disposed on at least one of the surfaces of the first upper cover 110a1 and the second upper cover 110a2 facing each other. The magnet may adhere the first upper cover 110a1 and the second upper cover 110a2 to each other, thereby increasing the bonding strength between the first upper cover 110a1 and the second upper cover 110a2.

[0210] In a display device 1200 according to another embodiment of the present invention, the upper cover 110a is composed of a first upper cover 110a1 and a second upper cover 110a2 having a thin thickness, and the first upper cover 110a1 and the second upper cover 110a2 are configured to be interlocked with each other. Therefore, compared to a case where a single cover is used, the display device 1200 can have high rigidity relative to its thickness, and warping of the display device 1200 that may occur due to expansion of the polarizing plate can be improved. In addition, in the display device 1200 according to another embodiment of the present invention, the first opening 111a of the first upper cover 110a1 and the second opening 111b of the second upper cover 110a2 are formed in separate processes, thereby minimizing the area of ​​the opening 111. Therefore, the problem of the opening 111 being visible to the user can be solved while maintaining the rigidity of the display device 1200.

[0211] In addition, in the display device 1200 according to another embodiment of the present invention, a friction reduction layer 1280 and / or a magnet is disposed between the first upper cover 110a1 and the second upper cover 110a2. If the first upper cover 110a1 and the second upper cover 110a2 are in direct contact with each other, friction may occur between the first upper cover 110a1 and the second upper cover 110a2 during the winding process, and the winding of the display panel 120 may not be smooth. Therefore, in the display device 1200 according to another embodiment of the present invention, the friction reduction layer 1280 and / or a magnet is disposed between the first upper cover 110a1 and the second upper cover 110a2 to maintain a bonding force so that the first upper cover 110a1 and the second upper cover 110a2 are not separated, and the first upper cover 110a1 and the second upper cover 110a2 may slip without a physical impact during winding. Therefore, in the display device 1200 according to still another embodiment of the present invention, defects such as peeling and cracking that may occur between the first upper cover 110a1 and the second upper cover 110a2 can be prevented.

[0212] Fig. 13 is a schematic plan view of a plate 1310 of a display device 1300 according to another embodiment of the present invention. Fig. 14a and Fig. 14b are enlarged plan views of Fig. 13. Fig. 14a is an enlarged plan view of region A of Fig. 13. Fig. 14b is an enlarged plan view of region B of Fig. 13. Fig. 14c is an enlarged plan view of region C of Fig. 13.

[0213] Referring to FIG. 13, the first plate includes a plurality of first ductile regions MA1 and a plurality of support regions between the plurality of first ductile regions MA1.

[0214] The first ductile region of the first plate includes a plurality of first openings 1311a.

[0215] The support regions of the first plate are disposed between the first ductile regions, and the support regions are free of the first openings 1311a formed in the first ductile regions.

[0216] A plurality of protruding patterns 1313 are arranged in the support region of the second plate. The plurality of protruding patterns 1313 are arranged corresponding to the plurality of first ductile regions of the first plate.

[0217] The multiple protruding patterns 1313 may be disposed to protrude by the thickness of the first plate.

[0218] The protruding patterns 1313 may be inserted into the first openings 1311a of the first plate, that is, the protruding patterns 1313 of the second plate may be exposed through the first openings 1311a of the first plate in areas overlapping with the supporting areas of the second plate.

[0219] When the plate 1310a is in a curved state, the plate 1310a may be curved with a different radius of curvature depending on the position, for example, the radius of curvature of the plate 1310a may be smaller from the center to the edge, but is not limited thereto.

[0220] At this time, the shape, position, interval, size, etc. of the plurality of protruding patterns 1313 may be formed variously according to the radius of curvature when the curved display device 1300 is in a curved state. For example, if the center of the display device 1300 is warped with a relatively large radius of curvature and the edge of the display device 1300 is warped with a relatively small radius of curvature, the width of the plurality of protruding patterns 1313 may become smaller from the center of the plate 1310a to the edge. Thus, the distance between the protruding patterns 1313 and the side of the first opening 1311a may increase from the center of the plate 1310a to the edge.

[0221] 14a and 14b, a distance d1 between the protruding pattern 1313 and the side of the first opening 1311a at the edge of the plate 1310a is greater than a distance d2 between the protruding pattern 1313 and the side of the first opening 1311a at the center of the plate 1310a. Also, referring to Figs. 14b and 14c, a distance d3 between the protruding pattern 1313 and the side of the first opening 1311a at the edge of the plate 1310a is greater than a distance d2 between the protruding pattern 1313 and the side of the first opening 1311a at the center of the plate 1310a.

[0222] 13 to 14c, the second plate may include a plurality of second openings. The plurality of second openings may have the same shape as the first opening 1311a of the first plate, but is not limited thereto.

[0223] The second openings of the second plate may be arranged to correspond to the support regions of the first plate, such that the second openings of the second plate arranged on the rear side of the support regions of the first plate may not be visible on the front side of plate 1310a.

[0224] In the plate 1310a of the display device 1300 according to another embodiment of the present invention, the plate 1310a is composed of a first plate and a second plate having a thin thickness, and the first plate and the second plate are configured to be interlocked with each other. Therefore, the plate 1310a can have high rigidity relative to its thickness compared to a case where the plate 1310a is composed of a single cover.

[0225] In addition, in the plate 1310a of the display device 1300 according to another embodiment of the present invention, the first opening 1311a of the first plate and the second opening of the second plate are formed in separate processes, thereby minimizing the areas of the first opening 1311a and the second opening. Therefore, the problem of the first opening 1311a and the second opening being visible to a user through a display panel disposed in front of the plate 1310a can be resolved while maintaining the rigidity of the display device 1300.

[0226] In addition, in the plate 1310a of the display device 1300 according to still another embodiment of the present invention, a protruding pattern 1313 is disposed on the second plate. Thus, the protruding pattern 1313 of the second plate is inserted into the first opening 1311a of the first plate, thereby strengthening the bonding force between the first plate and the second plate, and the rigidity of the entire plate 1310a may be improved.

[0227] In addition, in the plate 1310a of the display device 1300 according to another embodiment of the present invention, when the plate 1310a is in a curved state, the distance between the protruding pattern 1313 and the side of the first opening 1311a is arranged to vary depending on the radius of curvature. For example, when the plate 1310a is curved toward the center and the radius of curvature of the curved plate 1310a becomes smaller toward the edge of the plate 1310a, the first opening 1311a may shrink more at the edge of the plate 1310a. Therefore, the distance between the protruding pattern 1313 and the side of the first opening 1311a is increased in the area where the radius of curvature decreases, so that the variation of the first opening 1311a can be accommodated, and thus a stable curved operation can be implemented.

[0228] In the following, reference will be made to Table 1 to explain the effects of the display devices 100 and 1100 according to various embodiments of the present invention.

[0229] [Table 1]

[0230] In Table 1, the comparative example is a case where the upper cover supporting the display panel of the display device is formed as a single cover, the embodiment 1 is a case where the upper cover 110a of the display device 100 according to one embodiment of the present invention shown in Figs. 1 to 7, and the embodiment 2 is a case where the upper cover 1110a of the display device 1100 according to another embodiment of the present invention shown in Figs. 11a to 11d. The total thickness of the upper covers 110a, 1110a of the comparative example, the embodiment 1, and the embodiment 2 is the same as 0.4 mm. That is, the comparative example has a single upper cover with a thickness of 0.4 mm, the embodiment 1 has a thickness of the first upper cover 110a1 of 0.2 mm, the second upper cover 110a2 of 0.2 mm, and the embodiment 2 has a thickness of the first upper cover 1110a1 of 0.2 mm, and the second upper cover 1110a2 of 0.2 mm. The displacement amount in [Table 1] indicates how much the other side of upper cover 110a, 1110a in the comparative example, Examples 1, and 2 moves downward when one side of upper cover 110a, 1110a is fixed and a force of 20 N is applied downward to the other side of upper cover 110a, 1110a.

[0231] Referring to Table 1, in comparing the amount of displacement, the warpage level was improved by 59% in Example 1 compared to the comparative example. In addition, in comparing the amount of deformation due to load, it can be seen that the warpage level was improved by 76% in Example 2 compared to Example 1.

[0232] A display device according to an embodiment of the present invention can be described as follows.

[0233] A display device according to one embodiment of the present invention includes a display panel, a cover supporting a rear surface of the display panel, and a roller configured to wind or unwind the display panel and the cover, the cover including an upper cover adhered to the display panel, the upper cover including a first upper cover and a second upper cover including a plurality of recesses and a plurality of protrusions, the first upper cover being disposed between the display panel and the second upper cover, and the first upper cover being disposed to engage with the plurality of recesses and the plurality of protrusions of the second upper cover.

[0234] According to another feature of the present invention, the first upper cover may include a plurality of first openings, and the second upper cover may include a plurality of second openings overlapping some of the plurality of first openings.

[0235] According to another feature of the present invention, the first upper cover may include a ductile region overlapping the display panel and in which a plurality of first openings are arranged, and the second upper cover may include a plurality of ductile regions in which a plurality of second openings are arranged and a plurality of support regions between the plurality of ductile regions.

[0236] According to another feature of the present invention, the second upper cover further includes a plurality of protruding patterns arranged in the plurality of support areas, and the plurality of protruding patterns can be inserted into the plurality of first openings of the first upper cover.

[0237] According to another aspect of the present invention, a size of the plurality of protruding patterns may be smaller than a size of the plurality of first openings.

[0238] According to another feature of the present invention, the first upper cover may include a plurality of ductile regions in which the plurality of first openings are arranged and a plurality of support regions between the plurality of ductile regions, and the second upper cover may include a plurality of ductile regions corresponding to the plurality of support regions of the first upper cover and in which the plurality of second openings are arranged and a plurality of support regions corresponding to the plurality of ductile regions of the first upper cover.

[0239] According to another feature of the present invention, the second upper cover further includes a plurality of protruding patterns disposed in a plurality of support areas of the second upper cover, and the plurality of protruding patterns can be inserted into a plurality of first openings of the first upper cover.

[0240] According to another aspect of the present invention, a size of the plurality of protruding patterns may be the same as a size of the plurality of first openings.

[0241] According to another feature of the present invention, the first upper cover includes a plurality of recesses and a plurality of protrusions arranged to mate with the plurality of recesses and a plurality of protrusions of the second upper cover, and a width of the plurality of recesses of the first upper cover may be greater than a width of the plurality of protrusions of the second upper cover, and a width of the plurality of recesses of the second upper cover may be greater than a width of the plurality of protrusions of the first upper cover.

[0242] According to another feature of the present invention, a difference between a width of the plurality of corresponding recesses of the first upper cover and a width of the plurality of corresponding protrusions of the second upper cover, and a difference between a width of the plurality of corresponding recesses of the second upper cover and a width of the plurality of corresponding protrusions of the first upper cover may increase from a lower side of the upper cover adjacent to the roller to an upper side of the upper cover.

[0243] According to another feature of the present invention, when the display surface of the display panel is wound so that it does not face the roller, the multiple convex portions of the second upper cover may be positioned closer to the convex portions of the first upper cover below the multiple concave portions of the first upper cover than the convex portions of the first upper cover above the multiple concave portions of the first upper cover.

[0244] According to another feature of the present invention, when the display surface of the display panel is wound so as to face the roller, the multiple convex portions of the second upper cover may be positioned closer to the convex portions of the first upper cover above the multiple concave portions of the first upper cover than to the convex portions of the first upper cover below the multiple concave portions of the first upper cover.

[0245] According to another feature of the present invention, the distance between the multiple protrusions of the second upper cover and the protrusions of the first upper cover below the multiple recesses of the first upper cover may be the same as the distance between the multiple protrusions of the second upper cover and the protrusions of the first upper cover above the multiple recesses of the first upper cover.

[0246] According to another feature of the present invention, the display device may further include a head bar disposed at upper ends of the upper cover and the display panel, and a plurality of fastening members for fixing the head bar to the upper cover and the display panel, wherein one of the first upper cover and the second upper cover includes fastening holes corresponding to the plurality of fastening members, and the other of the first upper cover and the second upper cover includes fastening holes corresponding to some of the plurality of fastening members.

[0247] According to another aspect of the present invention, an upper end of the second upper cover and a side surface of the second upper cover may be spaced apart from the head bar.

[0248] According to another aspect of the present invention, the fastening hole of the other of the first and second upper covers may have a shape in which the width in the up-down direction is longer than the width in the left-right direction.

[0249] According to another aspect of the present invention, when the display panel is in a fully unwound state, the plurality of fastening members may be disposed above or below fastening holes of the other one of the first and second upper covers.

[0250] According to another aspect of the present invention, the device may further include a friction reducing layer disposed on at least one of the surfaces of the first and second upper covers facing each other, for reducing horizontal frictional force.

[0251] According to another aspect of the present invention, the device may further include a magnet disposed on at least one of a surface of the first upper cover and a surface of the second upper cover facing each other.

[0252] According to another aspect of the present invention, the cover may further include a lower cover connecting the upper cover and the roller.

[0253] A plate for a display device according to another embodiment of the present invention includes a first plate including a plurality of first openings, and a second plate arranged on a rear surface of the first plate and including a plurality of protruding patterns, the plurality of protruding patterns of the second plate being inserted into the plurality of first openings of the first plate, and a separation distance between the plurality of protruding patterns and the side surfaces of the plurality of first openings may increase from the center of the plate to the edge.

[0254] According to another aspect of the invention, the display plate may be curved with a large radius of curvature in the center and a smaller radius of curvature at the edges.

[0255] Although the embodiments of the present invention have been described in detail above with reference to the accompanying drawings, the present invention is not necessarily limited to these embodiments, and various modifications can be made within the scope of the technical idea of ​​the present invention. Therefore, the embodiments disclosed in the present invention are for illustration purposes, not for limiting the technical idea of ​​the present invention, and the scope of the technical idea of ​​the present invention is not limited by these embodiments. Therefore, the embodiments described above should be understood to be illustrative and not restrictive in all respects. All technical ideas within the scope equivalent to the claims of the present invention should be interpreted as being included in the scope of the present invention. [Explanation of symbols]

[0256] 100 display device 110a Top cover 110b Lower cover 160 Roller section

Claims

1. A display panel; A cover that supports a rear surface of the display panel; a roller configured to wind or unwind the display panel and the cover; the cover includes a top cover that is adhered to the display panel; the top cover includes a first top cover and a second top cover including a plurality of recesses and a plurality of protrusions; the first upper cover is disposed between the display panel and the second upper cover, the first upper cover is disposed to engage with a plurality of recesses and a plurality of protrusions of the second upper cover; the first top cover includes a plurality of first openings; The second upper cover includes a plurality of second openings overlapping some of the plurality of first openings.

2. the first upper cover includes a ductile region overlapping the display panel and in which the first openings are disposed; The display device of claim 1 , wherein the second top cover includes a plurality of ductile regions in which the second openings are disposed and a plurality of support regions between the plurality of ductile regions.

3. the second upper cover further includes a plurality of protrusion patterns disposed in the plurality of support areas, The display device of claim 2 , wherein the plurality of protrusion patterns are inserted into the plurality of first openings of the first upper cover.

4. The display device according to claim 3 , wherein a size of the plurality of protrusion patterns is smaller than a size of the plurality of first openings.

5. the first top cover includes a plurality of ductile regions in which a plurality of first openings are disposed and a plurality of support regions between the plurality of ductile regions; The display device of claim 1 , wherein the second upper cover includes a plurality of ductile regions in which a plurality of second openings are arranged, the plurality of ductile regions corresponding to the plurality of support regions of the first upper cover.

6. the second top cover further includes a plurality of protruding patterns disposed in a plurality of support areas of the second top cover, The display device of claim 5 , wherein the plurality of protrusion patterns are inserted into the plurality of first openings of the first upper cover.

7. The display device according to claim 6 , wherein a size of the plurality of protrusion patterns is the same as a size of the plurality of first openings.

8. the first upper cover includes a plurality of recesses and a plurality of protrusions arranged to engage with a plurality of recesses and a plurality of protrusions of the second upper cover, a width of the recesses of the first upper cover is greater than a width of the protrusions of the second upper cover; The display device of claim 1 , wherein a width of the recesses of the second upper cover is greater than a width of the protrusions of the first upper cover.

9. 9. The display device of claim 8, wherein a difference between a width of the plurality of corresponding recesses of the first upper cover and a width of the plurality of corresponding protrusions of the second upper cover and a difference between a width of the plurality of corresponding recesses of the second upper cover and a width of the plurality of corresponding protrusions of the first upper cover increase from a lower side of the upper cover adjacent to the roller to an upper side of the upper cover.

10. 10. The display device of claim 9, wherein when the display surface of the display panel is wound so as not to face the roller, the multiple convex portions of the second upper cover are positioned closer to the convex portions of the first upper cover below the multiple concave portions of the first upper cover than to the convex portions of the first upper cover above the multiple concave portions of the first upper cover.

11. 10. The display device of claim 9, wherein when the display surface of the display panel is wound to face the roller, the multiple convex portions of the second upper cover are positioned closer to the convex portions of the first upper cover above the multiple concave portions of the first upper cover than to the convex portions of the first upper cover below the multiple concave portions of the first upper cover.

12. 10. The display device of claim 9, wherein a distance between the plurality of protrusions of the second upper cover and the protrusions of the first upper cover below the plurality of recesses of the first upper cover is the same as a distance between the plurality of protrusions of the second upper cover and the protrusions of the first upper cover above the plurality of recesses of the first upper cover.

13. a head bar disposed at an upper end of the upper cover and the display panel; a plurality of fastening members for fastening the head bar, the upper cover, and the display panel; one of the first and second upper covers includes fastening holes corresponding to the plurality of fastening members; The display device of claim 1 , wherein the other of the first and second upper covers includes fastening holes corresponding to some of the fastening members.

14. The display device of claim 13 , wherein an upper end of the second upper cover and a side surface of the second upper cover are spaced apart from the head bar.

15. The display device of claim 13 , wherein the other of the fastening holes of the first and second upper covers has a vertical width greater than a horizontal width.

16. The display device of claim 15, wherein when the display panel is in a fully unwound state, the fastening members are disposed above or below fastening holes of the other of the first and second upper covers.

17. The display device of claim 1 , further comprising a friction reducing layer disposed on at least one of the surfaces of the first upper cover and the second upper cover facing each other, the friction reducing layer reducing a friction force in a horizontal direction.

18. The display device of claim 1 , further comprising a magnet disposed on at least one of a surface of the first upper cover and a surface of the second upper cover that face each other.

19. The display device of claim 1 , wherein the cover further comprises a lower cover connecting the upper cover and the roller.

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