KR20240120047A - Display device - Google Patents

Abstract

A display device according to an embodiment of the present specification includes a display panel including a display area and a non-display area; a back cover disposed on the back of the display panel; and a plurality of back bars arranged to surround the non-display area on both sides of the display panel and a rear surface of the back cover, wherein each of the plurality of back bars is arranged to correspond to the non-display area. one block; and at least one first link connected to the block to switch the block to a first state or a second state, wherein in the first state the block is spaced apart from the display panel, and in the second state the block is spaced apart from the display panel. The block is in contact with the display panel.

Description

Display device {DISPLAY DEVICE}

This specification relates to a display device, and more specifically, to a rollable display device that can display an image even when rolled up.

Display devices used in computer monitors, TVs, mobile phones, etc. include organic light emitting displays (OLED) that emit light on their own, and liquid crystal displays (LCD) that require a separate light source. there is.

The scope of application of display devices is becoming more diverse, including not only computer monitors and TVs but also personal portable devices, and research is being conducted on display devices that have a large display area but reduced volume and weight.

In addition, recently, rollable display devices, which are manufactured by forming display portions and wiring on a flexible substrate such as plastic, which is a flexible material, so that images can be displayed even when rolled, are attracting attention as next-generation display devices.

The problem to be solved by this specification is to provide a display device that can prevent curl of the display panel.

Another problem that the present specification aims to solve is to provide a display device that can prevent cracks in the display panel.

The tasks of this specification are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the description below.

A display device according to an embodiment of the present specification includes a display panel including a display area and a non-display area; a back cover disposed on the back of the display panel; and a plurality of back bars arranged to surround the non-display area on both sides of the display panel and a rear surface of the back cover, wherein each of the plurality of back bars is arranged to correspond to the non-display area. one block; and at least one first link connected to the block to switch the block to a first state or a second state, wherein in the first state the block is spaced apart from the display panel, and in the second state the block is spaced apart from the display panel. The block is in contact with the display panel.

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

This specification includes a plurality of back bars assembled with the display unit, thereby preventing the display panel from being bent.

This specification can improve the quality of a display device by preventing curl of the display panel.

The effects according to the present specification are not limited to the contents exemplified above, and further various effects are included within the present specification.

1A and 1B are perspective views of a display device according to an embodiment of the present specification.
Figure 2 is a perspective view of a display device according to an embodiment of the present specification.
3 is a schematic cross-sectional view of a display device according to an embodiment of the present specification.
FIG. 4A is an exploded perspective view illustrating a first cover and a second cover of a display device according to an embodiment of the present specification.
FIG. 4B is a top view of a display portion of a display device according to an embodiment of the present specification.
FIG. 4C is a cross-sectional view taken along line IVc-IVc' of FIG. 4B.
FIG. 5A is a plan view illustrating the combination of a display unit and a back bar of a display device according to an embodiment of the present specification.
FIG. 5B is a schematic cross-sectional view taken along line Vb-Vb' of FIG. 5A.
Figure 6 is a perspective view of a back bar of a display device according to an embodiment of the present specification.
FIGS. 7A and 7B are diagrams for explaining the first link of the back bar of FIG. 6.
FIGS. 8A to 8D are diagrams for explaining the fixing part of the back bar of FIG. 6.
FIGS. 9A to 9D are diagrams for explaining the coupling structure of the base portion of the back bar of FIG. 6.
FIGS. 10A and 10B are diagrams for explaining the block of the back bar in FIG. 6.
11A to 11C are diagrams for explaining the operation of a back bar of a display device according to an embodiment of the present specification.

The advantages and features of the present specification and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present specification is not limited to the embodiments disclosed below and will be implemented in various different forms, but the present embodiments only serve to ensure that the disclosure of the present specification is complete and are within the scope of knowledge of the technical field to which this specification pertains. It is provided to fully inform those who have the scope of the specification.

The shape, area, ratio, angle, number, etc. disclosed in the drawings for explaining the embodiments of the present specification are illustrative, and the present specification is not limited to the matters shown. Like reference numerals refer to like elements throughout the specification. Additionally, in describing the present specification, if it is determined that a detailed description of related known technologies may unnecessarily obscure the gist of the present specification, the detailed description will be omitted. When 'includes', 'has', 'consists of', etc. mentioned in this specification are used, other parts may be added unless 'only' is used. When a component is expressed in the singular, the plural is included unless specifically stated otherwise.

When interpreting a component, it is interpreted to include the margin of error even if there is no separate explicit description.

In the case of a description of a positional relationship, for example, if the positional relationship of two parts is described as 'on top', 'on the top', 'on the bottom', 'next to', etc., 'immediately' Alternatively, there may be one or more other parts placed between the two parts, unless 'directly' is used.

When an element or layer is referred to as “on” another element or layer, it includes instances where the other layer or other element is directly on top of or interposed between the other elements.

Additionally, first, second, etc. are used to describe various components, but these components are not limited by these terms. These terms are merely used to distinguish one component from another. Accordingly, the first component mentioned below may also be the second component within the technical idea of the present specification.

Like reference numerals refer to like elements throughout the specification.

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

Each feature of the various embodiments of the present specification can be combined or combined with each other, partially or entirely, and various technological interconnections and operations are possible, and each embodiment may be implemented independently of each other or together in a related relationship. It may be possible.

Hereinafter, the present specification will be described with reference to the drawings.

<Display device - rollable display device>

1A and 1B are perspective views of a display device according to an embodiment of the present specification. Referring to FIGS. 1A and 1B , a display device according to an embodiment of the present specification includes a display portion (DP) and a housing portion (HP).

The display unit DP is a component 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. At this time, since the display device 100 according to an embodiment of the present specification 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 be composed of a display panel 120 that has flexibility to enable winding or unwinding, a first cover 110a, and a second cover 110b. A more detailed description of the display unit DP will be described later with reference to FIGS. 4A to 4C.

The housing unit HP is a case in which the display unit DP can be accommodated. The display unit DP may be wound and stored inside the housing unit HP, and the display unit DP may be unwinded and placed outside the housing unit HP.

An opening HPO is disposed in the housing part HP so that the display part DP can move inside and outside the housing part HP. The display unit DP may move in the vertical direction by passing through the opening HPO of the housing unit HP.

Meanwhile, the display unit DP of the display device 100 may be switched from a full unwinding state to a full winding state, or from a full winding state to a full unwinding state.

In FIG. 1A, the display unit DP of the display device 100 is shown in a fully unwinded state, and the fully unwinded display unit DP of the display device 100 is disposed outside the housing unit HP. . That is, in order for the user to view the image through the display device 100, the display unit DP is unwinded and placed as much as possible outside the housing unit HP, and is in a fully unwinded state where it can no longer be unwinded. It can be defined as:

In FIG. 1B, the display portion DP of the display device 100 is shown in a fully wound state. The fully wound display portion DP of the display device 100 is stored inside the housing portion HP and cannot be wound any further. It is impossible. That is, when the user does not watch the image through the display device 100, it is advantageous in terms of appearance that the display portion DP is not disposed outside the housing portion HP, and therefore the display portion DP is wound to form the housing portion ( HP) The state stored inside can be defined as a fully wound state. Additionally, when the display unit DP is in a fully wound state stored within the housing unit HP, the volume of the display device 100 can be reduced and it can be easily transported.

Meanwhile, a driving unit MP that winds or unwinds the display unit DP is disposed to change the display unit DP to a fully unwinded or fully wound state.

<Drive part>

Figure 2 is a perspective view of a display device according to an embodiment of the present specification. 3 is a schematic cross-sectional view of a display device according to an embodiment of the present specification. FIG. 3 is a schematic cross-sectional view illustrating the roller R and the display unit DP of the display device 100 according to an embodiment of the present specification. For convenience of explanation, only the housing unit (HP), roller (R), and display unit (DP) are shown in FIG. 3 .

First, referring to FIG. 2, the driving part MP includes a roller part RP and an elevating part 190.

The roller unit (RP) rotates clockwise or counterclockwise and winds or unwinds the display unit (DP) fixed to the roller unit (RP). The roller portion (RP) includes a roller (R) and a roller support portion (RS).

The roller R is a member on which the display unit DP is wound. The roller R may have a cylindrical shape, for example. The lower edge of the display unit DP may be fixed to the roller R. When the roller (R) rotates, the display portion (DP) whose lower edge is fixed to the roller (R) may be wound around the roller (R). On the other hand, when the roller (R) rotates in the opposite direction, the display portion (DP) wound on the roller (R) may be unwound from the roller (R).

Referring to FIG. 3, the roller R may have a cylindrical shape in which at least a portion of the outer peripheral surface is flat and the remaining portion of the outer peripheral surface is curved. The roller R has an overall cylindrical shape, but a portion may be flat. That is, a portion of the outer peripheral surface of the roller R is formed flat, and the remaining portion of the outer peripheral surface is formed as a curved surface. For example, the roller R may be composed of a curved portion RR and a flat portion RF, and the flat portion RF of the roller R may include a plurality of flexible films and a printed circuit board of the display portion DP. It may be a part that is not settled. However, the roller R may have a completely cylindrical shape or any shape capable of winding the display unit DP, but is not limited thereto.

Referring again to Figure 2, the roller support (RS) supports the roller (R) on both sides of the roller (R). Specifically, the roller support portion (RS) is disposed on the bottom surface (HPF) of the housing portion (HP). And the upper side of the roller support (RS) is coupled to both ends of the roller (R). Accordingly, the roller support portion RS may support the roller R to be spaced apart from the bottom surface HPF of the housing portion HP. At this time, the roller (R) may be rotatably coupled to the roller support (RS).

The lifting unit 190 moves the display unit DP in the vertical direction in accordance with the driving of the roller unit RP. The lifting unit 190 includes a lifting link unit 191, a head bar 192, a motor 193, and a rotating unit 194.

The lifting link (191) of the lifting unit (190) includes a plurality of lifting links (191a, 191b) and a hinge (191c) connecting each of the plurality of lifting links (191a, 191b). Specifically, the plurality of lifting links (191a, 191b) include a first lifting link (191a) and a second lifting link (191b), and the first lifting link (191a) and the second lifting link (191b) intersect each other in a scissor shape and are rotatably connected via the hinge (191c). Accordingly, when the lifting link (191) moves in the up and down direction, each of the plurality of lifting links (191a, 191b) can rotate in a direction in which they move away from or closer to each other. The elevator link section (191) may be composed of a plurality of elevator links (191a, 191b) that intersect each other, but is not limited thereto, and may also be composed of a single elevator link that does not intersect.

The head bar 192 of the lifting unit 190 is fixed to the top of the display unit DP. The head bar 192 is connected to the lifting link unit 191 and can move the display unit DP in the vertical direction according to the rotation of the plurality of lifting links 191a and 191b of the lifting link unit 191. That is, the display unit DP can move in the vertical direction by the head bar 192 and the lifting link unit 191.

The head bar 192 covers only a portion of the surface adjacent to the uppermost 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 192 may be fixed with screws, but are not limited thereto.

The motor 193 may be connected to a power generator such as a separate external power source or a built-in battery to receive power. The motor 193 generates rotational force and provides driving force to the rotating unit 194.

The rotation unit 194 is connected to the motor 193 and is configured to convert the rotational motion from the motor 193 into a linear reciprocating motion. That is, the rotational motion of the motor 193 can be converted into a linear reciprocating motion of the structure fixed to the rotating part 194. For example, the rotating part 194 may be implemented as a ball screw including a shaft and a nut fastened to the shaft, but is not limited thereto.

The motor 193 and the rotating unit 194 can be linked with the lifting link unit 191 to raise and lower the display unit DP. The lifting link unit 191 is formed in a link structure and can repeatedly perform folding and unfolding operations by receiving driving force from the motor 193 and the rotating unit 194.

Specifically, when the display unit DP is wound, the structure of the rotating unit 194 may move in a straight line as the motor 193 is driven. That is, a portion of the rotating part 194 connected to one end of the second lifting link 191b can move in a straight line. Accordingly, one end of the second lifting link 191b may move toward the motor 193, and the plurality of lifting links 191a and 191b may be folded, thereby reducing the height of the lifting link unit 191. In addition, in the process of folding the plurality of lifting links 191a and 191b, the head bar 192 connected to the first lifting link 191a also lowers, and one end of the display unit DP connected to the head bar 192 also lowers. do.

When the display unit DP is unwinded, the motor 193 is driven and the structure of the rotating unit 194 may move in a straight line. That is, a portion of the rotating part 194 connected to one end of the second lifting link 191b can move in a straight line. Accordingly, one end of the second lifting link 191b can move in a direction away from the motor 193, and the plurality of lifting links 191a and 191b can be unfolded to increase the height of the lifting link unit 191. there is. In addition, in the process of unfolding the plurality of lifting links 191a and 191b, the head bar 192 connected to the first lifting link 191a also rises, and the display unit DP connected to the head bar 192 also rises. .

Accordingly, when the display unit DP is fully wound around the roller R, the lifting link unit 191 of the lifting unit 190 maintains the folded state. That is, when the display unit DP is fully wound on the roller R, the lifting unit 190 may have the lowest height. On the other hand, when the display unit DP is fully unwound, the lifting link unit 191 of the lifting unit 190 maintains the unfolded state. That is, when the display unit DP is fully unwound, the lifting unit 190 can have the highest height.

Meanwhile, when winding the display unit DP, the roller R may rotate, and the display unit DP may be wound around the roller R. 3 as an example, the display unit DP is connected to the roller R. And when the roller R rotates in the first direction DR1, that is, clockwise, the display unit DP may be wound with the rear surface of the display unit DP in close contact with the surface of the roller R.

When unwinding the display portion DP, the roller R may rotate, and the display portion DP may be unwinded from the roller R. 3 as an example, when the roller R rotates in the second direction DR2, that is, counterclockwise, the display portion DP wound on the roller R is unwound from the roller R. It may be placed outside the housing unit (HP).

In some embodiments, a driver having a structure other than the driver described above may be applied to the display device 100. That is, if the display unit DP can be wound and unwinded, the configuration of the roller unit RP and the lifting unit 190 described above may be changed, some components may be omitted, or other components may be added. .

<Display section>

FIG. 4A is an exploded perspective view illustrating a first cover and a second cover of a display device according to an embodiment of the present specification. FIG. 4B is a top view of a display portion of a display device according to an embodiment of the present specification. FIG. 4C is a cross-sectional view taken along line IVc-IVc' of FIG. 4B.

4A to 4C, the display unit DP includes a first cover 110a, a second cover 110b, a display panel 120, a plurality of flexible films FF, and a printed circuit board (PCB). do. However, the display unit DP is not limited thereto, and may be defined as including only the display panel 120, a plurality of flexible films FF, and a printed circuit board (PCB).

First, referring to FIGS. 4A to 4C, the first cover 110a is disposed on the back of the display panel 120 and supports the display panel 120. The first cover 110a may be referred to as a back cover in that it is disposed on the back of the display panel 120. The size of the first cover 110a may be larger than the size of the display panel 120. The first cover 110a may protect other components of the display unit DP from the outside. The first cover 110a may be fastened to the head bar 192 and the second cover 110b.

The first cover 110a is made of a rigid material, but at least a portion of the first cover 110a may have flexibility to be wound or unwound together with the display panel 120. For example, the first cover 110a may be made of a metal material such as SUS (Steel Use Stainless) or Invar, or a material such as plastic. However, the material of the first cover 110a may be changed in various ways depending on the design as long as it satisfies physical property conditions such as thermal deformation, radius of curvature, and rigidity, but is not limited thereto.

The first cover 110a includes a plurality of support areas (PA) and a flexible area (MA). The plurality of support areas PA is an area in which the plurality of openings 111 are not arranged, and the soft area MA is an area in which the plurality of openings 111 are arranged. Here, the plurality of openings 111 refer to holes formed to penetrate the first cover 110a along the thickness direction of the first cover 110a.

The first cover 110a includes a first support area (PA1), a soft area (MA), and a second support area (PA2), and from the top of the first cover 110a, the first support area (PA1), the soft area The area MA and the second support area PA2 are arranged sequentially. A plurality of support areas (PA) and soft areas (MA) may be arranged along the Y-axis direction. Here, the Y-axis direction may mean the direction in which the display unit DP is wound or unwinded. Additionally, the X-axis direction may mean a direction parallel to the rotation axis of the roller (R). Additionally, the Z-axis direction may refer to the thickness direction of the display panel 120, the first cover 110a, and the second cover 110b.

The first support area PA1 of the first cover 110a is the uppermost area of the first cover 110a and is an area fastened to the head bar 192. A first fastening hole AH1 may be formed in the first support area PA1 for fastening to the head bar 192. For example, a screw passing through the head bar 192 and the first fastening hole AH1 may be disposed to fasten the head bar 192 and the first support area PA1. And, as the first support area (PA1) is fastened to the head bar 192, when the lifting link unit 191 fastened to the head bar 192 rises or lowers, the first cover 110a also rises or falls. The display panel 120 attached to the first cover 110a may also be raised or lowered together. 4A and 4B show that there are five first fastening holes AH1, but the number of first fastening holes AH1 is not limited thereto. In addition, it has been described that the first cover 110a is fastened to the head bar 192 using the first fastening hole AH1, but this is not limited to this, and the first cover 110a and the head bar are fastened to each other without a separate fastening hole. (192) may be concluded.

The soft area MA of the first cover 110a is an area extending from the first support area PA1 to the lower side of the first cover 110a. The flexible area MA is an area where a plurality of openings 111 are disposed and the display panel 120 is attached. Specifically, the flexible area MA is an area that is wound or unwinded on the roller R along with the display panel 120. The flexible area MA may overlap at least the display panel 120 among other components of the display unit DP.

The second support area PA2 of the first cover 110a extends from the soft area MA and is the lowermost area of the first cover 110a. One end of the display panel 120 is disposed in the second support area PA2. For example, a pad area, which is a non-display area of one end of the display panel 120, may be disposed in the second support area PA2. A second fastening hole AH2 is disposed in the second support area PA2. In FIG. 4A, it is shown that there are 9 second fastening holes (AH2). However, the number of second fastening holes (AH2) is illustrative and is not limited thereto.

Meanwhile, the plurality of openings 111 formed in the flexible area MA are not formed in the first support area PA1 and the second support area PA2. Specifically, only the first fastening hole AH1 and the second fastening hole AH2 are formed in each of the first support area PA1 and the second support area PA2, and the plurality of openings 111 are not formed. . Additionally, the first fastening hole AH1 and the second fastening hole AH2 have different shapes from the plurality of openings 111 .

The first support area PA1 is an area fixed to the head bar 192, and the second support area PA2 includes one end of the display panel 120, a plurality of flexible films FF, and a printed circuit board (PCB). As a supported area, it may have more rigidity than the soft area (MA). And since the first support area (PA1) and the second support area (PA2) have rigidity, the first support area (PA1) and the second support area (PA2) are connected to the head bar 192 and the second cover 110b. ) can be firmly fixed. The second support area PA2 may protect one pad area of the display panel 120 and the printed circuit board (PCB) by keeping the pad area and the printed circuit board (PCB) flat. . Accordingly, the display unit DP is fixed to the head bar 192 of the driving unit MP and can be moved inside or outside the housing unit HP according to the operation of the driving unit MP, and the display panel 120 It can protect a set of pad areas and printed circuit boards (PCBs).

Meanwhile, in Figure 4b, the plurality of support areas (PA) and soft areas (MA) of the first cover 110a are shown as being sequentially arranged along the Y-axis direction, but the first cover 110a is arranged in the X-axis direction. When wound, a plurality of support areas (PA) and soft areas (MA) may be arranged along the X-axis direction.

When the display unit DP is wound or unwinded, the plurality of openings 111 disposed in the flexible area MA of the first cover 110a may be deformed by stress applied to the display unit DP. Specifically, when the display unit DP is wound or unwinded, the flexible area MA of the first cover 110a may be deformed as the plurality of openings 111 contract or expand. And, by contracting or expanding the plurality of openings 111, the slip phenomenon of the display panel 120 disposed on the flexible area MA of the first cover 110a is minimized and the damage to the display panel 120 is minimized. The stress, that is, stress, can be minimized.

The second cover 110b may be fastened to the first cover 110a and the roller R to connect the first cover 110a and the roller R. In the above-described manner, the second cover 110b connects the first cover 110a and the roller R, and finally connects the display panel 120 disposed on the first cover 110a and the roller R. You can. However, it is not limited to this, and as long as the second cover 110b can be connected to the first cover 110a and the roller R, the shape or connection method of the second cover 110b can be changed in various ways depending on the design. , but is not limited to this.

One end of the second cover 110b is the uppermost area of the second cover 110b and may overlap one end of the first cover 110a. For example, one end of the second cover 110b may overlap the second support area PA2. One end of the second cover 110b may overlap and be connected to a portion of the first cover 110a or may be connected to each other using a connecting member, but is not limited thereto.

The second cover 110b may include a plurality of fastening portions FP that overlap the first cover 110a. A plurality of fastening portions FP are disposed at one end of the second cover 110b. Additionally, a plurality of third fastening holes AH3 for fastening to the first cover 110a may be disposed in the plurality of fastening parts FP. The plurality of fastening parts (FP) in which the plurality of third fastening holes (AH3) are arranged are spaced apart from each other, and a space for bending the plurality of flexible films (FF) is secured between the plurality of fastening parts (FP). You can. In FIG. 4A, it is shown that there are 9 third fastening holes (AH3). However, the number of third fastening holes (AH3) is illustrative and is not limited thereto.

In Figure 4a, a second fastening hole ( Although it has been described that AH2) and the third fastening hole AH3 are disposed, the first cover 110a and the second cover 110b may be fixed to each other without separate fastening holes.

Meanwhile, when the second support area (PA2) and the plurality of fastening parts (FP) are wound around the roller (R), the roller (R) on which the second support area (PA2) and the plurality of fastening parts (FP) overlap The outer peripheral surface may be a planar portion (RF). Accordingly, the second support area PA2 can always maintain a flat state regardless of whether it is wound or unwound on the roller R, and one end of the display panel 120 disposed in the second support area PA2 The pad area of the printed circuit board (PCB) can also remain flat.

The area from one end to the other end of the second cover 110b is an extended area so that the display area AA of the display panel 120 can be disposed outside the housing unit HP. For example, when the first cover 110a and the display panel 120 are fully unwound, a plurality of flexible films FF and printing are printed from the other end of the second cover 110b fixed to the roller R. Up to one end of the second cover 110b where the circuit board (PCB) is disposed may be disposed inside the housing portion HP, and the flexible area MA where the display area AA of the display panel 120 is disposed. The first support area PA1 may be disposed outside the housing part HP. That is, from the other end of the second cover 110b fixed to the roller R to at least a portion of one end of the second cover 110b and the second support area PA2 may be disposed inside the housing portion HP. .

The other end of the second cover 110b is the lowermost area of the second cover 110b and is an area fastened to the roller R. A fourth fastening hole AH4 may be formed at the other end of the second cover 110b for fastening to the roller R. For example, a fastening member penetrating the roller R and the fourth fastening hole AH4 may be disposed to fasten the other end of the roller R and the second cover 110b. And as the other end of the second cover 110b is fastened to the roller R, the display panel 120, the first cover 110a, and the second cover 110b can be wound or unwinded by the roller R. there is. In FIG. 4A, there are two fourth fastening holes AH4, but the number of fourth fastening holes AH4 is not limited thereto.

Meanwhile, the plurality of openings 111 as formed in the flexible area MA of the first cover 110a are not formed in the second cover 110b. Specifically, the third fastening hole AH3 and the fourth fastening hole AH4 are formed at one end and the other end of the second cover 110b, respectively, and are formed in the flexible area MA of the first cover 110a. The same plurality of openings 111 are not formed. Additionally, the third fastening hole AH3 and the fourth fastening hole AH4 have different shapes from the plurality of openings 111 .

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

Referring to FIGS. 4B and 4C , the display panel 120 is disposed on one surface of the first cover 110a. The display panel 120 is disposed in the flexible area MA of the first cover 110a. The display panel 120 is a panel for displaying images to the user. The display panel 120 may include display elements for displaying images, driving elements for driving the display elements, and wiring for transmitting various signals to the display elements and driving elements.

Display elements may be defined differently depending on the type of display panel 120. For example, when the display panel 120 is an organic light emitting display panel 120, the display device may be an organic light emitting device including an anode, an organic light emitting layer, and a cathode. For example, when the display panel 120 is a liquid crystal display panel, the display element may be a liquid crystal display element. Hereinafter, the display panel 120 will be described assuming that the display panel 120 is an organic light emitting display panel. However, 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 specification is a rollable display device 100, the display panel 120 is implemented as a flexible display panel 120 to be wound or unwinded on a roller (R). It can be.

The display panel 120 includes a display area (AA) and a non-display area (NA).

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 disposed in the display area AA. The plurality of sub-pixels is the minimum unit constituting the display area AA, and a display element may be disposed in each of the plurality of sub-pixels. For example, an organic light-emitting device including an anode, an organic light-emitting layer, and a cathode may be disposed in each of the plurality of sub-pixels, but the present invention is not limited thereto. Additionally, a driving circuit for driving a plurality of sub-pixels may include driving elements and wiring. For example, the driving circuit may be made of a thin film transistor, a storage capacitor, a gate wire, a data wire, etc., but is not limited thereto.

The non-display area (NA) is an area where images are not displayed. Various wiring and circuits for driving organic light emitting devices in the display area AA are disposed in the non-display area NA. For example, a link wire or a driving IC such as a gate driver IC or data driver IC to transmit signals to a plurality of sub-pixels and a driving circuit in the display area (AA) may be placed in the non-display area (NA). , but is not limited to this.

Meanwhile, the non-display area (NA) includes a pad area and a gate driving area.

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 (FF) and the display panel 120, and the plurality of flexible films (FF) 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 support area (PA2) of the first cover 110a among the non-display areas (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 (FF), but is not limited thereto.

The gate driving area is an area where the gate driving unit is placed. The gate driving area may be a non-display area (NA) to the left and right of the display area (AA). The gate driver outputs the gate voltage and the light emission control voltage under the control of the timing controller, so that the sub-pixel to be charged with the data voltage can be selected and the light emission timing can be adjusted through wires such as the gate wire and the light emission control signal wire. Hereinafter, the gate driver will be described assuming that it is formed directly on the substrate 121 using a GIP (Gate-driver In Panel) method, but is not limited thereto. At this time, the gate driving area where the gate driving unit is disposed may also be referred to as the GIP area.

Referring to FIG. 4C , the display panel 120 includes a substrate 121, a buffer layer 122, a pixel portion 123, an encapsulation layer 124, an encapsulation substrate 125, and a polarizing plate 126.

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 with 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).

A buffer layer 122 is disposed on the upper surface of the substrate 121. The buffer layer 122 can prevent moisture and/or oxygen penetrating from the outside of the substrate 121 from diffusing. The buffer layer 122 may be made of an inorganic material. For example, the buffer layer 122 may be made of a single or double layer of silicon oxide (SiOx) or silicon nitride (SiNx), but is not limited thereto.

The pixel portion 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 devices and a circuit for driving the organic light emitting devices. The pixel unit 123 may be arranged to correspond to the display area AA.

Meanwhile, depending on the direction in which light emitted from the organic light emitting device is emitted, the display panel 120 may be configured as a top emission or bottom emission method.

The top emission method is a method in which light emitted from an organic light emitting device is emitted from the top of the substrate 121 on which the organic light emitting device is formed. In the case of the top emission method, a reflective layer may be formed below the anode to allow the light emitted from the organic light-emitting device to proceed to the top of the substrate 121, that is, toward the cathode.

The bottom emission method is a method in which light emitted from an organic light emitting device is emitted from the bottom of the substrate 121 on which the organic light emitting device is formed. In the case of the bottom emission method, in order to allow light emitted from the organic light emitting device to proceed to the lower part 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.

Hereinafter, for convenience of explanation, it is assumed that the display device 100 according to an embodiment of the present specification is a bottom emission type, but is not limited thereto.

The encapsulation layer 124 is disposed to cover the pixel portion 123. The encapsulation layer 124 seals the organic light emitting device of the pixel portion 123. The encapsulation layer 124 can protect the organic light emitting device of the pixel unit 123 from external moisture, oxygen, shock, etc. The encapsulation layer 124 may be formed by alternately stacking a plurality of inorganic layers and a plurality of organic layers. For example, the inorganic layer may be made of an inorganic material such as silicon nitride (SiNx), silicon oxide (SiOx), or aluminum oxide (AlOx), and the organic layer may be made of an epoxy-based or acryl-based polymer. However, it is not limited to this.

An encapsulation substrate 125 is disposed on the encapsulation layer 124. Specifically, the encapsulation substrate 125 is disposed between the encapsulation layer 124 and the first cover 110a. The encapsulation substrate 125 can protect the organic light emitting device of the pixel portion 123 together with the encapsulation layer 124. The encapsulation substrate 125 can protect the organic light emitting device of the pixel unit 123 from external moisture, oxygen, shock, etc. For example, the encapsulation substrate 125 may be made of a material having a high modulus of about 200 to 900 MPa, and the encapsulation substrate 125 may be made of aluminum (aluminum), which has strong corrosion resistance and is easy to process into a foil or thin film form. It may be made of a metal material such as Al), nickel (Ni), chromium (Cr), or an alloy material of iron (Fe) and nickel. Accordingly, by forming the encapsulation substrate 125 of a metal material, it is possible to implement the encapsulation substrate 125 in the form of an ultra-thin film, and strong protection against external impacts and scratches can be provided.

A first adhesive layer AD1 is disposed between the encapsulation layer 124 and the encapsulation substrate 125. The first adhesive layer AD1 may adhere the encapsulation layer 124 and the encapsulation substrate 125. The first adhesive layer AD1 is made of an adhesive material and may be a heat-curing or natural-curing type adhesive. For example, the first adhesive layer AD1 may be made of Optical Clear Adhesive (OCA), Pressure Sensitive Adhesive (PSA), etc., but is not limited thereto.

Meanwhile, the first adhesive layer AD1 may be arranged to surround the encapsulation layer 124 and the pixel portion 123. That is, the pixel portion 123 may be sealed by the buffer layer 122 and the encapsulation layer 124, and the encapsulation layer 124 and the pixel portion 123 may be sealed by the buffer layer 122 and the first adhesive layer AD1. Can be sealed. The first adhesive layer AD1, together with the encapsulation layer 124 and the encapsulation substrate 125, can protect the organic light emitting device of the pixel unit 123 from external moisture, oxygen, shock, etc. At this time, the first adhesive layer (AD1) may further include a moisture absorbent. The hygroscopic agent may be a particle with hygroscopic properties, and may absorb moisture and oxygen from the outside to minimize the penetration of moisture and oxygen into the pixel portion 123.

A second adhesive layer AD2 is disposed between the encapsulation substrate 125 and the first cover 110a. The second adhesive layer AD2 may adhere the encapsulation substrate 125 and the first cover 110a. The second adhesive layer AD2 is made of an adhesive material and may be a heat-curing type or natural-curing type adhesive. For example, the second adhesive layer AD2 may be made of Optical Clear Adhesive (OCA), Pressure Sensitive Adhesive (PSA), etc., but is not limited thereto.

The polarizing plate 126 is disposed on the front surface of the substrate 121. That is, the polarizer 126 may be disposed on the opposite side of the rear surface of the display panel 120 where the first cover 110a is disposed. Here, the front of the display panel 120 may refer to a side corresponding to the viewing direction, and the back of the display panel 120 may refer to a side opposite to the viewing direction.

The polarizer 126 can selectively transmit light and reduce reflection of external light incident on the display panel 120. Specifically, the display panel 120 includes various metal materials applied to semiconductor devices, wiring, organic light emitting devices, etc. Accordingly, external light incident on the display panel 120 may be reflected from the metal material, and the visibility of the display device 100 may be reduced due to the reflection of the external light. However, when the polarizer 126 is disposed, the polarizer 126 can increase the outdoor visibility of the display device 100 by preventing reflection of external light.

Referring to FIG. 4B, a plurality of flexible films FF are disposed at one end of the display panel 120. Specifically, the plurality of flexible films FF may be disposed on the lower part of the display panel 120 adjacent to the second support area PA2. The plurality of flexible films (FF) is a film for supplying signals to a plurality of sub-pixels and driving circuits that make up a plurality of pixels in the display area (AA) by placing various components on a flexible base film, and is a display panel ( 120) and can be electrically connected. One end of the plurality of flexible films FF is disposed in the non-display area NA of the display panel 120 to supply power voltage, data voltage, etc. to the plurality of sub-pixels and driving circuits in the display area AA. Meanwhile, in FIG. 4B, there are eight flexible films (FF), but the number of flexible films (FF) may vary depending on the design, and is not limited thereto.

A driving IC such as a gate driver IC and a data driver IC may be disposed on the base film of the plurality of flexible films (FF). A driving IC is a component that processes data for displaying images and driving signals for processing it. Depending on the mounting method, the driver IC may be placed in a Chip On Glass (COG), Chip On Film (COF), Tape Carrier Package (TCP), etc.

The plurality of flexible films FF are electrically connected to one end of the pad area of the display panel 120 and are bent toward the back of the first cover 110a. One end of the plurality of flexible films FF is connected to one end of the display panel 120 on one side of the first cover 110a, and the other end of the plurality of flexible films FF is connected to the opposite side of the first cover 110a. It may be placed on the side, but is not limited to this.

Referring to FIG. 4B, a printed circuit board (PCB) is disposed on the back of the first cover 110a. A printed circuit board (PCB) is electrically connected to a plurality of flexible films (FF). A printed circuit board (PCB) is a component that supplies signals to driving ICs of a plurality of flexible films (FF). A printed circuit board (PCB) supplies various signals, such as driving signals and data signals, to the driving IC. Various components may be placed on a printed circuit board (PCB) to supply various signals to a driver IC. For example, a data driver that generates data signals may be mounted on a printed circuit board (PCB), and the generated data signals may be transmitted to and from a plurality of sub-pixels of the display panel 120 through a plurality of flexible films (FF). Can be supplied to the circuit. Meanwhile, in FIG. 4B, there are two printed circuit boards (PCBs), but the number of printed circuit boards (PCBs) may vary depending on the design, and is not limited thereto.

Meanwhile, although not shown in FIG. 4B, an additional printed circuit board connected to the printed circuit board (PCB) may be further disposed. For example, the printed circuit board (PCB) may be referred to as a source printed circuit board (S-PCB) on which the data driver is mounted, and an additional printed circuit board connected to the printed circuit board (PCB) may be a timing controller. It may be referred to as a control printed circuit board (Control PCB; C-PCB) on which the etc. are mounted. The additional printed circuit board may be placed within the roller R, may be placed outside the roller R within the housing portion HP, or may be placed in direct contact with the printed circuit board PCB.

<Back bar>

FIG. 5A is a plan view illustrating the combination of a display unit and a back bar of a display device according to an embodiment of the present specification. FIG. 5B is a schematic cross-sectional view taken along line Vb-Vb' of FIG. 5A.

Referring to FIGS. 5A and 5B , the display device 100 includes a plurality of back bars BB surrounding a portion of the display portion DP. The plurality of back bars BB may be wound or unwinded on the roller R together with the display portion DP.

The plurality of back bars BB are arranged to correspond to the display panel 120 . In particular, the plurality of back bars BB may be arranged to correspond to the display area AA. At this time, the plurality of back bars BB may be arranged so as not to block the display area AA. That is, since the display area AA is an area where an image is displayed, the plurality of back bars BB may be disposed only in the non-display area NA on the front surface of the display panel 120. Specifically, the plurality of back bars BB are arranged to surround the non-display area NA on both sides of the display panel 120 and the rear surface of the first cover 110a. That is, each of the plurality of back bars BB may surround the back of the first cover 110b from one side of the front of the display panel 120 and extend to the other side of the front of the display panel 120. Each of the plurality of back bars BB may extend in the X-axis direction. Additionally, a plurality of back bars BB may be arranged side by side in the Y-axis direction.

The plurality of back bars BB may be arranged at a predetermined distance from each other, but is not limited thereto. That is, the plurality of back bars BB may be arranged to contact each other. Additionally, the plurality of back bars BB may be connected to each other by wires or the like.

The plurality of back bars BB may prevent the display panel 120 from curling by supporting both sides and the back of the front of the display unit DP. In particular, since the plurality of back bars BB are arranged to correspond to the display area AA, it is possible to prevent the display area AA from being bent. Accordingly, cracks in the display area AA due to curl of the display panel 120 can be prevented and display quality can be improved.

Each of the plurality of back bars (BB) includes a support case 130, at least one first link 140, at least one fixing part 150, at least one base part 160, and at least one second link ( 170) and at least one block 180. The plurality of back bars BB may be switched to the first state or the second state by moving the first link 140, the second link 170, and the block 180. Here, the first state is a state in which the block 180 is spaced apart from the display panel 120, and the second state is a state in which the block 180 is in contact with the display panel 120. When the block 180 is in contact with the display panel 120, a force pressing on both sides of the display panel 120 is applied, thereby preventing the display panel 120 from curling. This will be described later with reference to FIGS. 11A to 11C.

<Structure of back bar>

Figure 6 is a perspective view of a back bar of a display device according to an embodiment of the present specification. FIGS. 7A and 7B are diagrams for explaining the first link of the back bar of FIG. 6. FIGS. 8A to 8D are diagrams for explaining the fixing part of the back bar of FIG. 6. FIGS. 9A to 9D are diagrams for explaining the coupling structure of the base portion of the back bar of FIG. 6. FIGS. 10A and 10B are diagrams for explaining the block of the back bar in FIG. 6. In FIG. 6, only some of the components of the back bar BB are shown for convenience of explanation. That is, in FIG. 6, only the first link 140, the base portion 160, the second link 170, and the block 180 are shown one by one, but in reality, the first link 140, the base portion 160, The second link 170 and block 180 may be provided in plural numbers.

6 to 10B, the back bar (BB) includes a support case 130, a first link 140, a fixing part 150, a base part 160, a second link 170, and a block 180. ) includes.

The support case 130 is disposed on the back of the first cover 110a. The support case 130 may be arranged to cover the first cover 110a. The support case 130 may be combined with the base portion 160 to support the display portion DP. The support case 130 may extend from one side of the display unit DP to the other side. That is, the support case 130 may extend in the X-axis direction. The length of the support case 130 in the X-axis direction may be greater than the length of the display panel 120 or the first cover 110a in the X-axis direction.

The support case 130 may include a lower plate 131 and a plurality of side walls 132. The lower plate 131 may be an area facing the first cover 110a. A plurality of side walls 132 may protrude from four corners of the lower plate 131 toward the first cover 110a. The support case 130 may include an internal space formed by a lower plate 131 and a plurality of side walls 132. A first link 140, etc. may be disposed in the internal space of the support case 130. The support case 130 may have an open top. The open upper part of the support case 130 may be covered by the base portion 160.

The lower plate 131 includes a first fastening portion 133 and a guide hole 134. The first fastening portion 133 may be coupled to the first link 140 to secure the first link 140. The guide hole 134 may guide the movement of the fixing part 150. The guide hole 134 may have an arc shape, but is not limited thereto.

The first link 140 is disposed inside the support case 130. The first link 140 may be coupled to the first fastening portion 133 of the lower plate 131 and fixed to the inside of the support case 130. The first link 140 may be symmetrically disposed on one side and the other side of the support case 130. That is, although only the first link 140 disposed on one side of the support case 130 is shown in FIGS. 6, 9A, and 10A, the first link 140 is actually provided as a pair to support the support case 130. One can be placed on one side and one on the other side. Accordingly, the first fastening portion 133 coupled to the first link 140 may also be symmetrically disposed on one side and the other side of the lower plate 131.

7A and 7B, the first link 140 includes a fastening link 141 and a link plate 145.

The fastening link 141 is coupled to the first fastening part 133 of the support case 130 and the second fastening part 163 of the base part 160. The fastening link 141 includes a first sub-link (142a), a second sub-link (142b), a third sub-link (142c), a first link shaft (143a), a second link shaft (143b), and a support member (144). ) includes.

The first sub-links 142a are provided as a pair. A pair of first sub-links 142a may be arranged to overlap each other. A link plate 145 may be disposed between the pair of first sub-links 142a. The pair of first sub-links 142a and the link plate 145 may be coupled to each other by the axis of the support member 144.

The third sub-link 142c is disposed on the opposite side of the first sub-link 142a. The third sub-link 142c is provided as a pair. A pair of third sub-links 142c may be arranged to overlap each other.

The second sub-link 142b is provided in plurality and connects the first sub-link 142a and the third sub-link 142c. That is, one end of the second sub-link 142b may be connected to the first sub-link 142a, and the other end may be connected to the third sub-link 142c. There may be a total of four second sub-links 142b. Specifically, two of the plurality of second sub-links 142b may overlap each other and connect the other end of the pair of first sub-links 142a and one end of the pair of third sub-links 142c. The remaining two of the plurality of second sub-links 142b overlap each other and may connect one end of the pair of first sub-links 142a and the other end of the pair of third sub-links 142c.

The first link shaft 143a couples two second sub-links 142b arranged to overlap each other at the outermost edge. The first link shaft 143a may be arranged to extend in the Z-axis direction and penetrate the two second sub-links 142b. Additionally, referring to FIG. 9C , one end of the first link shaft 143a may be coupled to the fixing part 150, and the other end may be disposed within the guide part 164 of the base part 160, which will be described later. As the first link shaft 143a moves by the fixing part 150, the first link 140 can move as a whole.

The second link shaft 143b is provided as a pair and is coupled to one end and the other end of the third sub-link 142c, respectively. That is, one end of the pair of third sub-links 142c and the other end of the pair of second sub-links 142b overlapping therewith may be coupled to each other by the second link shaft 143b. Additionally, the other end of the pair of third sub-links 142c and the other end of the pair of second sub-links 142b overlapping therewith may be coupled to each other by another second link shaft 143b. The pair of second link shafts 143b may extend in the Z-axis direction. One end of the pair of second link shafts 143b may be coupled to the first fastening portion 133, and the other end may be coupled to the second fastening portion 163 of the base portion 160.

The support member 144 connects the pair of first sub-links 142a and the link plate 145. Accordingly, the movement of the fastening link 141 may be transmitted to the link plate 145.

Link plate 145 extends from fastening link 141 toward block 180. The link plate 145 may extend in the X-axis direction, but is not limited thereto. The link plate 145 may move to one side or the other within the support case 130 by moving the fastening link 141. At this time, the link plate 145 may be connected to the block 180. Accordingly, the block 180 may be switched to the first state or the second state by moving the link plate 145.

The first link 140 may be configured to move in a Chebyshev approximate straight line. Specifically, the ratio of the lengths of the first sub-link 142a, the second sub-link 142b, and the third sub-link 142c of the fastening link 141 may be 2:5:4. Accordingly, when the fixing part 150 is moved in the opposite direction of the block 180, the first link 140 can move together with the fixing part 150 in the opposite direction of the block 180. In particular, the link plate 145 may move in the opposite direction of the block 180 due to the Chebyshev approximate rectilinear movement of the fastening link 141. And the block 180 connected to the link plate 145 can be converted to the second state. When the fixing part 150 is moved in the direction toward the block 180, the first link 140 may move along with the fixing part 150 in the direction facing the block 180. In particular, the link plate 145 may move in a direction toward the block 180 due to the Chebyshev approximate rectilinear movement of the fastening link 141. And the block 180 connected to the link plate 145 can be converted to the first state.

The fixing part 150 is coupled to the fastening link 141 of the first link 140. Specifically, as shown in FIGS. 7A, 7B, and 9C, the fixing part 150 may be coupled to the first link shaft 143a of the fastening link 141. Additionally, the fixing part 150 may be arranged to correspond to the guide hole 134 of the support case 130. Accordingly, the fixing part 150 may move in a direction toward the block 180 or in a direction opposite to the block 180 along the arc shape of the guide hole 134.

Referring to FIGS. 8A to 8C , the fixing part 150 includes a pin case 151 and a fixing pin 155. Additionally, the fixing part 150 may further include a spring disposed inside the pin case 151. Meanwhile, Figure 8b may be a perspective view of the pin case 150 cut in half.

The pin case 151 includes a first fixing groove 151a, a second fixing groove 151b, a spring groove 151c, and a first coupling hole 151h. Meanwhile, in Figure 8b, two first fixing grooves 151a and one second fixing groove 151b are shown, but in reality, three first fixing grooves 151a and three second fixing grooves 151b are formed each. It can be.

The first fixing groove 151a and the second fixing groove 151b may be grooves facing upward from the spring groove 151c. The second fixing groove 151b may be formed thinner than the first fixing groove 151a. The first fixing groove 151a and the second fixing groove 151b may be grooves into which the fixing protrusion 155a of the fixing pin 155 is inserted. When the fixing protrusion 155a is inserted into the first fixing groove 151a or the second fixing groove 151b, the position of the fixing pin 155 may be fixed.

A spring may be placed in the spring groove 151c. The spring can easily change the position of the fixing pin 155. Specifically, when the spring is compressed by applying pressure to the fixing pin 155, a space in which the fixing protrusion 155a can easily move may be formed within the spring groove 151c. Accordingly, the fixing pin 155 can easily rotate within the spring groove 151c. Additionally, the spring can easily fix the position of the fixing pin 155. Specifically, when the fixing protrusion 155a of the fixing pin 155 is inserted into the first fixing groove 151a or the second fixing groove 151b, the spring presses the lower part of the fixing pin 155 by elastic force. You can. Accordingly, the fixing protrusion 155a can be easily fixed without being separated from the first fixing groove 151a or the second fixing groove 151b.

The first coupling hole 151h is formed to penetrate the pin case 151. The first coupling hole 151h may be a hole for coupling with the fastening link 141. The first link shaft 143a of the fastening link 141 is inserted into the first coupling hole 151h, so that the fixing part 150 and the first link 140 can be coupled.

The fixing pin 155 is coupled to the pin case 151. The fixing pin 155 may be placed on a spring inside the pin case 151. A portion of the fixing pin 155 may be inserted into the pin case 151, and the remaining portion may protrude from the pin case 151.

The fixing pin 155 includes a fixing protrusion 155a protruding from the side. The fixing protrusion 155a may be inserted into the first fixing groove 151a or the second fixing groove 151b. There may be three fixing protrusions 155a. At this time, the distance between the plurality of fixing protrusions 155a may correspond to the distance between the plurality of first fixing grooves 151a and the distance between the plurality of second fixing grooves 151b. That is, all of the plurality of fixing protrusions 155a may be inserted into the plurality of first fixing grooves 151a, or all of the plurality of fixing protrusions 155a may be inserted into the plurality of second fixing grooves 151b. When the fixing protrusion 155a is inserted into the first fixing groove 151a or the second fixing groove 151b, the fixing pin 155 may be fixed within the pin case 151 without being rotated.

The fixing pin 155 includes a first coupling hole 151h and a corresponding second coupling hole 155h. The second coupling hole 155h may be formed to have a certain depth from the bottom of the fixing pin 155 toward the top. The second coupling hole 155h may be a hole for coupling to the fastening link 141. The first link shaft 143a of the fastening link 141 is inserted into the second coupling hole 155h, so that the fixing part 150 and the first link 140 can be coupled.

As shown in FIG. 8D, the fixing pin 155 is disposed within the guide hole 134. In particular, when the fixing protrusion 155a is inserted into the first fixing groove 151a, the fixing pin 155 protrudes out of the guide hole 134. That is, the fixing pin 155 may protrude further outward than the outer surface of the lower plate 131. Accordingly, by moving the fixing pin 155 protruding to the outside of the support case 130 along the guide hole 134, Chebyshev approximate rectilinear movement of the first link 140 can be achieved. Conversely, when the fixing protrusion 155a is inserted into the second fixing groove 151b, the end of the fixing pin 155 may be placed in the guide hole 134. That is, the fixing pin 155 does not protrude outside of the guide hole 134. Accordingly, when the display unit DP and the plurality of back bars BB are wound or unwinded on the roller R, interference or damage caused by the fixing pin 155 may not occur.

Meanwhile, although only one guide hole 134 is shown in FIG. 8D, the guide hole 134 may be symmetrically disposed on one side and the other side of the support case 130. That is, since the first link 140 is provided as a pair and is symmetrically disposed on one side and the other side of the support case 130, the fixing portion 150 coupled to the first link 140 is also provided as a pair. do. Additionally, the guide holes 134 corresponding to the fixing portion 150 may also be provided as a pair.

The base portion 160 is coupled to the upper part of the support case 130. The base portion 160 may cover the open upper portion of the support case 130. The first cover 110a, the display panel 120, and the block 180 may be disposed in the base portion 160. Additionally, the base portion 160 may be coupled to the first link 150 and fixed to the support case 130 and the first link 150. The base portion 160 may be symmetrically disposed on one side and the other side of the support case 130. Additionally, the base portion 160 may be provided as a pair on one side and the other side of the support case 130, respectively. That is, although only one base portion 160 disposed on one side of the support case 130 is shown in FIGS. 6, 9A, and 10A, in reality, the support case 130 can be combined with four base portions 160. You can.

Referring to FIGS. 9A and 9B, the base portion 160 includes a first base portion 161 and a second base portion 162.

The first base portion 161 may correspond to a plurality of side walls 132 of the support case 130. That is, the first base portion 161 may be disposed on the same line as the plurality of side walls 132. Accordingly, the first base portion 161 may form a side wall portion of the back bar BB together with a plurality of side walls 132.

The second base portion 162 may protrude from a portion of the first base portion 161 in a direction to cover the upper part of the support case 130. In particular, the second base portion 162 may be a portion where the first cover 110a and the display panel 120 are disposed. Accordingly, the base portion 160 may support the display portion DP by the second base portion 162. The second base portion 162 includes a second fastening portion 163, a guide portion 164, and a third fastening portion 165.

Referring to FIG. 9C, the second fastening portion 163 is coupled to the second link shaft 143b. That is, one end of the second link shaft 143b may be coupled to the first fastening part 133, and the other end may be coupled to the second fastening part 163. The second fastening portion 163 of the base portion 160 and the first fastening portion 133 of the lower plate 131 of the support case 130 may face each other and be formed symmetrically. Accordingly, the first link 140 can be easily coupled between the base portion 160 and the support case 130.

A first link shaft 143a is disposed on the guide portion 164. That is, one end of the first link shaft 143a may be coupled to the fixing part 150, and the other end may be disposed within the guide part 164. The guide portion 164 of the base portion 160 and the guide hole 134 of the lower plate 131 of the support case 130 may face each other and be formed symmetrically. The guide unit 164 may guide the movement of the fixing unit 150 together with the guide hole 134. Accordingly, when the fixing part 150 moves along the guide hole 134, the first link shaft 143a can also easily move along the guide part 164.

The guide portion 164 includes a pair of third fixing grooves 164a. A pair of third fixing grooves 164a may be disposed one at each end of the guide portion 164. The pair of third fixing grooves 164a can stop the movement of the fixing part 150. Specifically, when the first link shaft 143a is inserted into the third fixing groove 164a, movement of the first link shaft 143a may be stopped. In particular, when the back bar BB is in the first state, the first link shaft 143a may be inserted into the fixing groove 164a disposed at one end of the guide portion 164. Additionally, when the back bar BB is in the second state, the first link shaft 143a may be inserted into the fixing groove 164a disposed at the other end of the guide portion 164. Since the first link shaft 143a is inserted into the third fixing groove 164a, the movement of the first link shaft 143a is stopped, and the first or second state can be easily maintained.

Referring to FIG. 9D, the third fastening portion 165 is coupled to the second link 170. Specifically, the first fixed shaft 175a penetrating the second link 170 is inserted into the third fastening portion 165. Accordingly, the second link 170 may rotate relative to the third fastening portion 165.

The second link 170 connects the first link 140 and the block 180. The second link 170 may be formed in an “L” shape. The second link 170 includes a first part 171 and a second part 172. The first part 171 is coupled to the link plate 145. The first portion 171 may extend from the link plate 145 toward the block 180. The second part 172 has a predetermined angle with the first part 171 and extends from the first part 171. The first part 171 and the second part 172 may be substantially vertical, but are not limited thereto. The second portion 172 is coupled to the block 180. In particular, as shown in FIG. 6, the second part 172 may be coupled to the block 180 by a second fixed shaft 175b penetrating the second part 172. A first fixed shaft 175a may be inserted into the boundary between the first part 171 and the second part 172.

Block 180 is disposed on base portion 160. In particular, the block 180 may be inserted into a space spaced apart from the first base portion 161 and the second base portion 162. Specifically, a space may exist between the first base portion 161 corresponding to the side wall 132 and the second base portion 162 on which the display panel 120 is disposed. The block 180 may be coupled to the base portion 160 by the spaced apart space. Additionally, the spaced apart space may be formed to prevent interference between the block 180 and the base portion 160 when the block 180 is moved. The blocks 180 may be arranged to correspond to both sides of the back bar BB. That is, the block 180 may be arranged to correspond to the non-display area NA on both sides of the display panel 120.

Referring to FIGS. 10A and 10B , blocks 180 may be provided as a pair on one side and the other side of the support case 130, respectively. Additionally, the blocks 180 may be symmetrically disposed on one side and the other side of the support case 130. That is, although only two blocks 180 arranged on one side of the support case 130 are shown in FIG. 10A, in reality, the blocks 180 may be composed of four blocks, the same as the base portion 160.

The block 180 includes a protrusion 181, a fourth fastening portion 182, a fastening protrusion 180a, and a fastening groove 180h. In particular, referring to FIG. 6, one of the pair of blocks 180 in contact with each other may be configured to include a fastening groove 180h, and the other may be configured to include a fastening protrusion 180a.

The protrusion 181 is a portion that protrudes toward the second base portion 162 from the area of the block 180 facing the second base portion 162. In particular, the protrusion 181 may protrude toward the display panel 120 . The protrusion 181 may move in a direction in contact with the display panel 120 or in a direction away from the display panel 120 by moving the first link 140. Specifically, in the first state, the protrusion 181 may be spaced apart from the display panel 120. In the second state, the protrusion 181 may directly contact the display panel 120. As the protrusion 181 presses both sides of the display panel 120 in the second state, curling of the display panel 120 can be prevented.

The protrusion 181 may have an anti-static effect. For example, the protrusion 181 may be made of an antistatic film or an antistatic pad that has been subjected to antistatic treatment. Accordingly, when the block 180 and the display panel 120 come into contact, unnecessary static electricity is prevented from being generated in the display panel 120. Additionally, static electricity of the display panel 120 can be easily discharged to the outside. Accordingly, malfunction of the display panel 120 can be prevented.

The fourth fastening portion 182 is disposed in an area of the block 180 adjacent to the support case 130. In particular, as shown in FIG. 6, the fourth fastening portion 182 may be disposed in a portion of the block 180 extending toward the second link 170. The fourth fastening portion 182 is coupled to the second portion 172 of the second link 170. Specifically, the second fixing shaft 175b penetrating the second portion 172 is inserted into the fourth fastening portion 182. Accordingly, the block 180 may be connected to the second link 170 by the fourth fastening portion 182 and the second fixed shaft 175b.

The fourth fastening portion 182 may be arranged to face each other in each pair of neighboring blocks 180. Additionally, the area of the block 180 where the fourth fastening portion 182 is formed may be configured as a groove with a certain depth. Accordingly, by disposing the second fixed shaft 175b in the groove, the second fixed shaft 175b can be coupled to the pair of blocks 180. That is, one end of the second fixed shaft 175b is inserted into the fourth fastening portion 182 of one of the pair of blocks 180, and the other end of the second fixed shaft 175b is inserted into the fourth fastening portion 182 of the pair of blocks 180. ) can be inserted into another fourth fastening part 182. And the second part 172 of the second link 170 may be coupled to the area between one end and the other end of the second fixed shaft 175b. Therefore, during the Chebyshev approximate rectilinear movement of the first link 140, the second link 170 and the pair of blocks 180 move together, so that the pair of blocks 180 are in the first or second state. can be converted to

One of the pair of adjacent blocks 180 includes a fastening protrusion 180a, and the other includes a fastening groove 180h. The fastening protrusion 180a and the fastening groove 180h may be disposed on each surface of the pair of blocks 180 in contact with each other. The fastening protrusion 180a may be inserted into the fastening groove 180h. Accordingly, a pair of blocks 180 may be combined with each other.

<Back bar operation>

11A to 11C are diagrams for explaining the operation of a back bar of a display device according to an embodiment of the present specification. FIG. 11A is a diagram showing the first state of the back bar BB, FIG. 11C is a diagram showing the second state of the back bar BB, and FIG. 11B is a diagram showing just before the second state of the back bar BB. am. 11A to 11C, for convenience of explanation, among the components of the display device 100, the first cover 110a, the display panel 120, the first link 140, the fixing part 150, and the base part 160 are shown. ), only the second link 170 and block 180 are shown.

Referring to FIG. 11A, in the first state, the block 180 is spaced apart from the display panel 120. At this time, the first link shaft 143a connected to the fixing part 150 may be inserted into the third fixing groove 164a disposed on one side of the guide part 164. Accordingly, in the first state, the movement of the first link shaft 143a is stopped, and the first link 140 can remain fixed without moving. Additionally, in the first state, the block 180 may not be seated on the base portion 160 but may be spaced apart by a certain distance. Accordingly, in the first state, a plurality of back bars BB can be assembled to the display unit DP.

Meanwhile, in Figure 11a, the fixing pin 155 of the fixing part 150 may be disposed inside the guide hole 134 of the support case 130. That is, the fixing protrusion 155a of the fixing pin 155 may be inserted into the second fixing groove 151b of the pin case 151. In this case, the fixing pin 155 does not protrude out of the support case 130. However, the shape of the fixing part 150 in the first state is not limited to this, and the fixing protrusion 155a may be disposed in the first fixing groove 151a or the spring groove 151c in the first state.

Referring to FIG. 11B, in order to change the back bar BB from the first state to the second state, the fixing part 150 is moved. At this time, the fixing part 150 may move in an arc following the shape of the guide hole 134. Additionally, the first link shaft 143a connected to the fixing part 150 may also move in an arc along the shape of the guide part 164. When switching from the first state to the second state, the fixing part 150 and the first link shaft 143a may move in the opposite direction of the block 180. As the fixing part 150 and the first link shaft 143a move, the first link 140 may move in the opposite direction of the block 180. That is, the link plate 145 can move in the opposite direction of the block 180 due to the Chebyshev approximate rectilinear movement of the first link 140. And the second link 170 connected to the link plate 145 can rotate. Additionally, the block 180 connected to the second link 170 can make an approximate vertical movement. That is, the block 180 can move in a direction closer to the display panel 120 by the second link 170.

Meanwhile, the link plate 145 may be configured to move not only in the X-axis direction but also in the Z-axis direction due to the Chebyshev approximate rectilinear movement of the first link 140. That is, as shown in FIGS. 11A and 11B, the link plate 145 can move in the direction opposite to the block 180 in the X-axis direction and at the same time move in the direction opposite to the block 180 in the Z-axis direction. . Accordingly, the axis of the support member 144 connecting the link plate 145 and the pair of first sub-links 142a may be formed to have clearance for movement of the link plate 145 in the Z-axis direction.

When switching from the first state to the second state, the fixing pin 155 of the fixing part 150 may protrude outside the guide hole 134 of the support case 130. That is, the fixing protrusion 155a of the fixing pin 155 may be inserted into the first fixing groove 151a of the pin case 151. Accordingly, the first link 140 can be easily moved using the fixing pin 155 protruding outside of the back bar BB. This can be equally applied when switching from the second state to the first state.

Referring to FIG. 11C, in the second state, the block 180 is in contact with the display panel 120. At this time, the first link shaft 143a connected to the fixing part 150 may be inserted into the third fixing groove 164a disposed on the other side of the guide part 164. Accordingly, in the second state, the movement of the first link shaft 143a is stopped, and the first link 140 can remain fixed without moving. Additionally, in the second state, the block 180 is seated on the base portion 160 and can be fixed without moving any further toward the display panel 120.

The protrusion 181 of the block 180 may directly contact the non-display area NA on both sides of the display panel 120. Accordingly, the protrusion 181 may apply a pressing force in the Z-axis direction to both sides of the display panel 120. Additionally, the display panel 120 and the first cover 110a are disposed on the second base portion 162. That is, the rear surface of the display unit DP is supported by the second base unit 162. Accordingly, the display panel 120 is not bent and is flat due to the force pressing both sides of the display panel 120 in the direction of the second base portion 162 and the force of the second base portion 162 supporting the display portion DP. status can be maintained.

Meanwhile, in Figure 11c, the fixing pin 155 of the fixing part 150 may be disposed inside the guide hole 134 of the support case 130. That is, the fixing protrusion 155a of the fixing pin 155 may be inserted into the second fixing groove 151b of the pin case 151. In this case, the fixing pin 155 does not protrude out of the support case 130. Accordingly, the display unit DP and the plurality of back bars BB can be easily wound or unwinded on the roller R. However, the shape of the fixing part 150 in the third state is not limited to this.

The polarizing plate of the display device includes a polyvinyl alcohol (PVA)-based polymer film. At this time, the polyvinyl alcohol (PVA)-based polymer material may be a material with good hygroscopicity. Accordingly, the volume of the polarizing plate changes depending on humidity. That is, the polarizer may expand by absorbing moisture present in the air in a high-humidity environment, and may contract by expelling moisture in a low-humidity environment. In particular, contraction or expansion of the polarizer may occur from both ends. Accordingly, curl may occur in the polarizer as the polarizer shrinks or expands from both ends. As the polarizer is bent due to curl, the display panel including the polarizer may also be bent. Curling of the display panel may cause cracks in the display unit. Additionally, in a rollable display device, cracks may occur in the driving part of the non-display area due to the continuous winding or unwinding operation of the display panel.

The display device 100 according to an embodiment of the present specification includes a plurality of back bars BB to prevent the display panel 120 from curling. The plurality of back bars BB are arranged to surround the non-display area NA on both sides of the display panel 120 and the rear surface of the first cover 110a. Accordingly, the display panel 120 can be maintained in a flat state by the plurality of back bars BB. Accordingly, cracks in the display area AA and non-display area NA can be prevented.

Specifically, the plurality of back bars BB may include blocks 180 arranged to correspond to the non-display areas NA on both sides of the display panel 120. The block 180 is in direct contact with the display panel 120 and includes a protrusion 181 that presses the display panel 120 with a predetermined force. The non-display area NA on both sides of the display panel 120 may be prevented from bending due to the pressing force of the protrusion 181. Additionally, the plurality of back bars BB includes a base portion 160 on which the display panel 120 and the first cover 110a are disposed. The base portion 160 may be disposed on the back of the display portion DP to support the display panel 120 and the first cover 110a. Accordingly, the display panel 120 is in a horizontal state due to the force of the protrusion 181 pressing both sides of the display panel 120 in the direction of the base portion 160 and the force of the base portion 160 supporting the display portion DP. It can be maintained. Accordingly, curling of the display panel 120 can be prevented and the quality of the display device 100 can be improved.

The plurality of back bars BB can be easily switched to the first state or the second state by the fixing part 150. Here, the first state is a state in which the block 180 is spaced apart from the display panel 120, and the second state is a state in which the block 180 is in contact with the display panel 120. That is, during the operation of assembling or separating the plurality of back bars BB and the display unit DP, the plurality of back bars BB can be switched to the first state. In the first state, the block 180 is spaced apart from the display panel 120, so the plurality of back bars BB and the display unit DP can be easily assembled or separated. Additionally, in the second state, the block 180 presses both sides of the display panel 120, thereby preventing the display panel 120 from curling.

The movement of the fixing part 150 may be guided by the guide hole 134 of the support case 130. Additionally, the movement of the first link shaft 143a of the first link 140 connected to the fixing part 150 may be guided by the guide part 164 of the base part 160.

In particular, the fixing pin 155 of the fixing part 150 may be configured to protrude outside the guide hole 134 or be retracted into the guide hole 134. When the fixing pin 155 protrudes out of the guide hole 134, the back bar BB can be easily switched to the first state or the second state using the fixing part 150. When the fixing pin 155 is inserted into the guide hole 134, winding or unwinding of the back bar BB and the display unit DP can be easily performed without interference by the fixing pin 155.

The guide hole 134 includes a pair of third fixing grooves 164a disposed one at each end on both sides. In the first or second state, the link shaft 143a may be inserted into one of the pair of third fixing grooves 164a. Accordingly, the movement of the link axis 143a is stopped, and the back bar BB can easily maintain the first or second state.

A display device according to various embodiments of the present specification may be described as follows.

A display device according to an embodiment of the present specification includes a display panel including a display area and a non-display area; a back cover disposed on the back of the display panel; and a plurality of back bars arranged to surround the non-display area on both sides of the display panel and a rear surface of the back cover, wherein each of the plurality of back bars is arranged to correspond to the non-display area. one block; and at least one first link connected to the block to switch the block to a first state or a second state, wherein in the first state the block is spaced apart from the display panel, and in the second state the block is spaced apart from the display panel. The block abuts the display panel.

According to another feature of the present specification, a roller for winding or unwinding the display panel, the back cover, and the plurality of back bars may be further included.

According to another feature of the present specification, each of the plurality of back bars extends in a first direction, which is the rotation axis of the roller, and the plurality of back bars may be arranged side by side along a second direction different from the first direction. .

According to another feature of the present specification, the first link is configured to move in a Chebyshev-like straight line, the block includes a protrusion protruding toward the display panel, and the movement of the first link causes the The protrusion of the block may be configured to move in a direction in contact with the display panel or in a direction away from the display panel.

According to another feature of the present specification, when the first link moves in a direction toward the block, the block is configured to transition to the first state, and when the first link moves in a direction opposite to the block, The block may be configured to transition to the second state.

According to another feature of the present specification, each of the plurality of back bars includes: a support case that covers a rear surface of the back cover and extends from one side of the display panel to the other side; and at least one base portion coupled to the upper part of the support case and on which the back cover and the block are disposed, and the first link may be disposed inside the support case.

According to another feature of the present specification, the first link, the base portion, and the block may be symmetrically disposed on one side and the other side of the support case.

According to another feature of the present specification, the base portion may be provided as a pair on one side of the support case, and the block may be provided as a pair on one side of the support case.

According to another feature of the present specification, the base portion includes a first base portion corresponding to a side wall of the support case; and a second base portion that protrudes from a portion of the first base portion to cover the upper part of the support case and includes the back cover, wherein the block is spaced apart between the first base portion and the second base portion. Can be inserted into space.

According to another feature of the present specification, the first link includes: a fastening link fastened to the support case and the base portion; And it may include a link plate extending from the fastening link toward the block.

According to another feature of the present specification, it may further include a second link connecting the link plate and the block.

According to another feature of the present specification, it further includes a fixing part that is coupled to the fastening link and moves the first link to one side or the other, wherein the fixing part includes a first fixing groove and a first fixing groove that is thinner than the first fixing groove. 2 Pin case with fixing grooves; a spring disposed inside the pin case; and a fixing pin disposed on the spring inside the pin case and including a fixing protrusion inserted into the first fixing groove or the second fixing groove.

According to another feature of the present specification, the support case includes a guide hole that guides the movement of the fixing part, and when the fixing protrusion is inserted into the first fixing groove, the fixing pin is moved to the outside of the guide hole. When the fixing protrusion is inserted into the second fixing groove, the fixing pin may be placed in the guide hole.

According to another feature of the present specification, the base portion includes a guide portion that guides movement of the fixing portion; and a third fixing groove disposed in the guide part to stop movement of the fixing part, wherein one end of the fastening link is coupled to the fixing part and the other end moves along the guide part or is fixed to the third fixing link. It may include a link axis inserted into the groove.

According to another feature of the present specification, the display panel may include a polarizer disposed on an opposite side of the back cover.

Although the embodiments of the present specification have been described in more detail with reference to the accompanying drawings, the present specification is not necessarily limited to these embodiments, and various modifications may be made without departing from the technical spirit of the present specification. . Accordingly, the embodiments disclosed in this specification are not intended to limit the technical idea of the present specification, but are for illustrative purposes, and the scope of the technical idea of the present specification is not limited by these embodiments. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive. The scope of protection of this specification should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of rights of this specification.

100: display device
110a: first cover
110b: second cover
111: opening
120: display panel
121: substrate
122: buffer layer
123: Pixel unit
124: Encapsulation layer
125: Encapsulation substrate
126: Polarizer
BB: back bar
130: support case
131: lower plate
132: side wall
133, 163, 165, 182: Fastening part
134: Guide hole
140: first link
141: fastening link
142a, 142b, 142c: sub links
143a, 143b: link axis
144: support member
145: link plate
150: fixing part
151: pin case
151a, 151b, 164a: Fixed groove
151c: spring groove
155: fixing pin
155a: fixing protrusion
151h, 155h: mating hole
160: base part
161: first base part
162: second base part
164: Guide unit
170: second link
171: Part 1
172: Part 2
175a, 175b: fixed axis
180: block
181: protrusion
180a: fastening protrusion
180h: fastening groove
FF: Flexible film
PCB: printed circuit board
MP: driving part
RP: roller part
R: roller
RF: flat part
RR: Curved part
RS: roller support
190: Elevating unit
191: Elevating link unit
191a, 191b: lifting link
191c: Hinge portion
192: Head bar
193: motor
194: Rotating part
DP: display
HP: Housing part
HPO: opening
HPF: bottom surface
MA: soft area
PA: support area
AA: display area
NA: Non-display area
AH1, AH2, AH3, AH4: fastening holes
FP: fastener
AD1, AD2: Adhesive layer

Claims (15)

a display panel including a display area and a non-display area;
a back cover disposed on the back of the display panel; and
a plurality of back bars arranged to surround the non-display area on both sides of the display panel and a rear surface of the back cover;
Each of the plurality of back bars is,
at least one block arranged to correspond to the non-display area; and
At least one first link connected to the block to switch the block to a first state or a second state,
In the first state, the block is spaced apart from the display panel, and in the second state, the block is in contact with the display panel. According to paragraph 1,
A display device further comprising a roller for winding or unwinding the display panel, the back cover, and the plurality of back bars. According to paragraph 2,
Each of the plurality of back bars extends in a first direction, which is the rotation axis of the roller,
The display device wherein the plurality of back bars are arranged side by side along a second direction different from the first direction. According to paragraph 1,
The first link is configured to move in a Chebyshev approximate straight line,
The block includes a protrusion protruding toward the display panel,
The display device is configured to move the protrusion of the block in a direction in contact with the display panel or in a direction away from the display panel due to movement of the first link. According to paragraph 1,
When the first link moves in a direction toward the block, the block is configured to switch to the first state,
When the first link moves in a direction opposite to the block, the block is configured to switch to the second state. According to paragraph 1,
Each of the plurality of back bars is,
a support case that covers the back of the back cover and extends from one side of the display panel to the other side; and
It is coupled to the upper part of the support case and includes at least one base portion on which the back cover and the block are disposed,
The first link is disposed inside the support case. According to clause 6,
The first link, the base portion, and the block are symmetrically disposed on one side and the other side of the support case. In clause 7,
The base portion is provided as a pair on one side of the support case,
The display device wherein the blocks are provided as a pair on one side of the support case. According to clause 6,
The base portion includes a first base portion corresponding to a side wall of the support case; and
A second base portion protrudes from a portion of the first base portion to cover the upper portion of the support case and includes a second base portion on which the back cover is disposed,
The block is inserted into a space between the first base portion and the second base portion. According to clause 6,
The first link is,
a fastening link fastened to the support case and the base portion; and
A display device comprising a link plate extending from the fastening link toward the block. According to clause 10,
A display device further comprising a second link connecting the link plate and the block. According to clause 10,
Further comprising a fixing part coupled to the fastening link to move the first link to one side or the other,
The fixing part,
a pin case including a first fixing groove and a second fixing groove thinner than the first fixing groove;
a spring disposed inside the pin case; and
A display device comprising a fixing pin disposed on the spring inside the pin case and including a fixing protrusion inserted into the first fixing groove or the second fixing groove. According to clause 12,
The support case includes a guide hole that guides the movement of the fixing unit,
When the fixing protrusion is inserted into the first fixing groove, the fixing pin protrudes out of the guide hole,
When the fixing protrusion is inserted into the second fixing groove, the fixing pin is disposed in the guide hole. According to clause 12,
The base part,
A guide part that guides the movement of the fixing part; and
It further includes a third fixing groove disposed in the guide part to stop the movement of the fixing part,
The fastening link includes a link shaft, one end of which is coupled to the fixing part, and the other end of which moves along the guide part or is inserted into the third fixing groove. According to paragraph 1,
The display panel includes a polarizer disposed on an opposite side of the back cover.

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