Display device

Abstract

A display device according to an aspect of the present disclosure includes: a display panel; a plurality of flexible films electrically connected to one end of the display panel; a plurality of source printed circuit boards electrically connected to the plurality of flexible films; a roller around which the display panel is wound or unwound; a control printed circuit board disposed in the roller; and a wiring sheet including a first wiring electrically connecting at least one of the plurality of source printed circuit boards and the control printed circuit board. Accordingly, by providing the wiring sheet in which the first wiring and the sheet are integrated, damage to the first wiring caused by repeated winding and unwinding can be minimized or such damage can be minimized.

Description

[0001] Cross - reference to related applications

[0002] This application claims priority to Korean Patent Application No. 10 - 2021 - 0070059, filed with the Korean Intellectual Property Office on May 31, 2021, the disclosure of which is incorporated herein by reference. Technical Field

[0003] The present disclosure relates to a display device, and more particularly, to a rollable display device capable of displaying an image even in a rolled - up state. Background Art

[0004] As display devices for monitors of computers, televisions, cellular phones, etc., there are organic light - emitting display devices (OLEDs) as self - emitting devices, liquid - crystal display devices (LCDs) that require a separate light source, etc.

[0005] The application scope of display devices has been diversified to personal digital assistants and monitors of computers and televisions, and display devices with a large display area and reduced volume and weight are being studied.

[0006] In addition, recently, a rollable display device that can display an image even when the display device is rolled up has been attracting attention as a next - generation display device by manufacturing it by forming a display unit and wirings on a flexible substrate such as plastic, which is a flexible material. Summary of the Invention

[0007] An object to be achieved by the present disclosure is a display device in which reliability during winding and unwinding is improved by a wiring sheet.

[0008] Another object to be achieved by the present disclosure is to provide a display device capable of easily changing the arrangement of a control printed circuit board.

[0009] Still another object to be achieved by the present disclosure is to provide a display device that reduces damage to wirings connecting a source printed circuit board and a control printed circuit board.

[0010] Still another object of the present disclosure is to provide a display device in which a spring is provided in the middle of a roller to apply a uniform force to the entire roller.

[0011] Still another object to be achieved by the present disclosure is to provide a display device that compensates for alignment errors between multiple wirings and a source printed circuit board and a control printed circuit board due to an increased size of the display device.

[0012] The object of the present disclosure is not limited to the above objects, and other objects not mentioned above can be clearly understood by those skilled in the art from the following description.

[0013] To solve the above object, a display device according to one aspect of the present disclosure includes: a display panel; a plurality of flexible films electrically connected to one end of the display panel; a plurality of source printed circuit boards electrically connected to the plurality of flexible films; a roller around which the display panel is wound or unwound; a control printed circuit board provided in the roller; and a wiring sheet including a first wiring electrically connecting at least one of the plurality of source printed circuits and the control printed circuit board. Accordingly, by providing the wiring sheet in which the first wiring and the sheet are integrated, damage to the first wiring caused by repeated winding and unwinding can be reduced or minimized.

[0014] To solve the above object, a display device according to another aspect of the present disclosure includes: a display panel; a plurality of source printed circuit boards electrically connected to the display panel; a control printed circuit board electrically connected to the plurality of source printed circuit boards; a wiring sheet electrically connecting the plurality of source printed circuit boards and the control printed circuit board; and a roller connected to the wiring sheet and accommodating the control printed circuit board therein, wherein a spring is provided in the middle of the roller. Accordingly, by providing the spring in the middle of the roller, the display panel can be wound around the roller without being deformed.

[0015] To solve the above object, a rollable display device according to another aspect of the present disclosure includes: a display panel; a back cover supporting the display panel on the rear surface thereof, a flexible film electrically connected to one end of the display panel; a source printed circuit board electrically connected to the flexible film; a roller around which the display panel is wound or unwound; a control printed circuit board provided in the roller; and a wiring sheet including a pair of sheets joined to each other and a first wiring provided between the pair of sheets, wherein the pair of sheets connect the back cover and the roller, and wherein the first wiring electrically connects the source printed circuit board and the control printed circuit board.

[0016] Other details of the exemplary embodiments are included in the detailed description and the drawings.

[0017] According to the present disclosure, for example, a wiring (e.g., a flexible flat cable) connecting the source printed circuit board and the control printed circuit board and a sheet (e.g., an extension sheet) connecting the back cover and the roller are integrally formed as a wiring sheet to minimize damage or separation of the wiring.

[0018] According to the present disclosure, the positions of the control printed circuit board and the first wiring can be easily changed in the roller.

[0019] According to the present disclosure, a spring can be provided in the middle of the roller to minimize the inclined winding of the display device around the roller.

[0020] According to the present disclosure, alignment errors of a plurality of wirings of a wiring sheet, a plurality of source printed circuit boards, and a control printed circuit board can be compensated for.

[0021] According to the present disclosure, contact errors of a display device when the display device is wound or unwound can be minimized.

[0022] The effects according to the present disclosure are not limited to those exemplified above, and more various effects are included in this specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other aspects, features, and other advantages of the present disclosure will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0024] Figure 1A and Figure 1B is a perspective view of a display device according to an exemplary embodiment of the present disclosure;

[0025] Figure 2 is a perspective view of a display device according to an exemplary embodiment of the present disclosure;

[0026] Figure 3 is a schematic cross-sectional view of a display device according to an exemplary embodiment of the present disclosure;

[0027] Figure 4 and Figure 5 is a plan view of a display unit of a display device according to an exemplary embodiment of the present disclosure;

[0028] Figure 6 is a cross-sectional view of a display device according to an exemplary embodiment of the present disclosure;

[0029] Figure 7 is a plan view of a display device according to another exemplary embodiment of the present disclosure;

[0030] Figure 8 is a plan view of a display device according to still another exemplary embodiment of the present disclosure;

[0031] Figure 9 is a plan view of a display device according to still another exemplary embodiment of the present disclosure; and

[0032] Figure 10 is an enlarged plan view of a display device according to various exemplary embodiments of the present disclosure. DETAILED DESCRIPTION

[0033] Advantages and features of the present disclosure, and methods for achieving these advantages and features, will become clear by referring to the exemplary embodiments described in detail below in conjunction with the accompanying drawings. However, the present disclosure is not limited to the exemplary embodiments disclosed herein and will be implemented in various forms. The exemplary embodiments are provided only by way of example so that those skilled in the art can fully understand the disclosure of the present disclosure and the scope of the present disclosure. Therefore, the present disclosure is defined only by the scope of the appended claims.

[0034] The shapes, sizes, ratios, angles, numbers, etc. shown in the drawings used to describe the exemplary embodiments of the present disclosure are merely examples, and the present disclosure is not limited thereto. Throughout the specification, like reference numerals generally denote like elements. In addition, in the following description of the present disclosure, detailed descriptions of known related technologies may be omitted to avoid unnecessarily obscuring the subject matter of the present disclosure. Terms such as "comprising," "having," and "consisting of" used herein are generally intended to allow the addition of other components, unless these terms are used together with the term "only." Any reference to the singular may include the plural unless otherwise explicitly stated.

[0035] Even if not explicitly stated, components are construed to include a normal error range.

[0036] When terms such as "on," "above," "below," and "next to" are used to describe the positional relationship between two components, one or more components may be located between the two components unless these terms are used together with the terms "immediately" or "directly."

[0037] When an element or layer is provided "on" another element or layer, the element or layer may be directly provided on the other element or layer, or other layers or other elements may be provided between them.

[0038] Although terms such as "first," "second," etc. are used to describe each component, these components are not limited by these terms. These terms are only used to distinguish one component from other components. Therefore, the first component mentioned below may be the second component in the technical concept of the present disclosure.

[0039] Throughout the specification, like reference numerals generally denote like elements.

[0040] For ease of description, the dimensions and thicknesses of each component shown in the drawings are shown, and the present disclosure is not limited to the dimensions and thicknesses of the components shown.

[0041] The features of the various embodiments of the present disclosure may be partially or wholly attached to or combined with each other, and may be interlocked and operated in various ways technically, and the embodiments may be executed independently of each other or in association with each other.

[0042] Hereinafter, a display device according to an exemplary embodiment of the present disclosure will be described in detail with reference to the accompanying drawings.

[0043] A rollable display device may refer to a display device that can display an image even when the display device is rolled up. Compared with a general display device of the related art, the rollable display device may have high flexibility. Depending on whether the rollable display device is used, the shape of the rollable display device may be freely changed. Specifically, when the rollable display device is not in use, the rollable display device is rolled up so as to be stored in a reduced volume. In contrast, when the rollable display device is in use, the rolled-up rollable display device is unrolled for use.

[0044] Figure 1A and Figure 1B are perspective views of a display device according to an exemplary embodiment of the present disclosure. Referring to Figure 1A and Figure 1B a display device 100 according to an exemplary embodiment of the present disclosure includes a display unit DP and a housing unit HP.

[0045] The display unit DP is a configuration for displaying an image to a user, and for example, a display element and circuits, wirings, components, etc. for driving the display element may be provided in the display unit DP. In this case, since the display device 100 according to an exemplary embodiment of the present disclosure is a rollable display device, the display unit DP may be configured to be wound or unwound. For example, the display unit DP may be formed of a display panel and a back cover, both of which are flexible to be wound or unwound. The display unit DP will be described in more detail below with reference to Figures 4 to 6 more specifically.

[0046] The housing unit HP is an outer shell in which the display unit DP is accommodated. The display unit DP may be wound up to be accommodated in the housing unit HP, and the display unit DP may be unwound to be disposed outside the housing unit HP.

[0047] The housing unit HP has an opening HPO that allows the display unit DP to move into and out of the housing unit HP. The display unit DP may move in the vertical direction by passing through the opening HPO of the housing unit HP.

[0048] Meanwhile, the display unit DP of the display device 100 may be switched from a fully unwound state to a fully wound state or from a fully wound state to a fully unwound state.

[0049] Figure 1A The fully unwound state of the display unit DP of the display device 100 is shown, and the fully unwound display unit DP of the display device 100 is disposed outside the housing unit HP. That is, in order for a user to view an image through the display device 100, when the display unit DP is unwound to be disposed outside the housing unit HP as much as possible and cannot be further unwound, this can be defined as the fully unwound state.

[0050] Figure 1B The display unit DP of the fully wound display device 100 is shown, and in the fully wound state, the display unit DP of the display device 100 is accommodated in the housing unit HP and cannot be further wound. That is, when a user does not view an image through the display device 100, from an appearance perspective, it is advantageous that the display unit DP is not disposed outside the housing unit HP. Therefore, when the display unit DP is wound to be accommodated in the housing unit HP, this is defined as the fully wound state. In addition, when the display unit DP is in the fully wound state to be accommodated in the housing unit HP, the volume of the display device 100 is reduced, such that the display device 100 can be easily carried.

[0051] Meanwhile, in order to switch the display unit DP to the fully unwound state or the fully wound state, a driving unit MP for winding or unwinding the display unit DP is provided.

[0052] Figure 2 is a perspective view of a display device according to an exemplary embodiment of the present disclosure. Figure 3 is a schematic cross-sectional view of a display device according to an exemplary embodiment of the present disclosure. Figure 3 is a schematic cross-sectional view for explaining a roller 181 and a display unit DP of a display device 100 according to an exemplary embodiment of the present disclosure. For ease of description, in Figure 2 , the spring and the rotating shaft in the roller 181 are not shown, and in Figure 3 , only the housing unit HP, the roller 181, and the display unit DP are shown.

[0053] First, referring to Figure 2 , the driving unit MP includes a roller unit 180 and a lifting unit 170.

[0054] The roller unit 180 rotates in a clockwise direction or a counterclockwise direction to wind or unwind the display unit DP fixed to the roller unit 180. The roller unit 180 includes a roller 181 and a roller support unit 182.

[0055] The roller 181 is a member around which the display unit DP is wound. The roller 181 can be formed, for example, in a cylindrical shape. The lower edge of the display unit DP can be fixed to the roller 181. When the roller 181 rotates, the display unit DP fixed to the roller 181 by its lower edge can be wound around the roller 181. In contrast, when the roller 181 rotates in the opposite direction, the display unit DP wound around the roller 181 can be unwound from the roller 181.

[0056] Referring to Figure 3 , the roller 181 can be formed in a cylindrical shape, wherein at least a part of the outer peripheral surface of the roller 181 is flat, while the remaining part of the outer peripheral surface is a curved portion. Even if the roller 181 can have a cylindrical shape as a whole, a part of it can be formed by a flat surface. That is, a part of the outer peripheral surface of the roller 181 is formed as flat, while the remaining part of the outer peripheral surface is formed as a curved surface. For example, the roller 181 can be composed of a curved portion 181R and a flat portion 181F. However, the roller 181 can have a completely cylindrical shape or any shape that can wind the display unit DP, but is not limited thereto.

[0057] Referring again to Figure 2 , the roller support unit 182 supports the roller 181 on both sides of the roller 181. Specifically, the roller support unit 182 is provided on the bottom surface HPF of the housing unit HP. The upper side surface of the roller support unit 182 is coupled to both ends of the roller 181. By doing so, the roller support unit 182 can support the roller 181 to be spaced apart from the bottom surface HPF of the housing unit HP. In this case, the roller 181 can be rotatably coupled to the roller support unit 182.

[0058] The lifting unit 170 moves the display unit DP in the vertical direction according to the driving of the roller unit 180. The lifting unit 170 includes a link unit 171, a head rod 172, a slide rail 173, a slider 174, a motor 175, and a rotating unit 176.

[0059] The link unit 171 of the lifting unit 170 includes a plurality of links 171a and 171b and a hinge unit 171c that connects the plurality of links 171a and 171b to each other. Specifically, the plurality of links 171a and 171b include a first link 171a and a second link 171b, and the first link 171a and the second link 171b cross each other in the form of scissors and are rotatably fastened by means of the hinge unit 171c. When the link unit 171 moves in the vertical direction, the plurality of links 171a and 171b can rotate to move away from or close to each other.

[0060] The head rod 172 of the lifting unit 170 is fixed to the uppermost end of the display unit DP. The head rod 172 is coupled to the link unit 171 to move the display unit DP in the vertical direction according to the rotation of the plurality of links 171a and 171b of the link unit 171. That is, the display unit DP can move in the vertical direction through the head rod 172 and the link unit 171.

[0061] The head rod 172 only covers a part of the surface of the display unit DP adjacent to the uppermost edge so as not to hide the image displayed on the front surface of the display unit DP. The display unit DP and the head rod 172 can be fixed by screws, but are not limited thereto.

[0062] The slide rail 173 of the lifting unit 170 provides a movement path for the plurality of links 171a and 171b. Parts of the plurality of links 171a and 171b are rotatably fastened to the slide rail 173 so as to guide the movement along the trajectory of the slide rail 173. Parts of the plurality of links 171a and 171b are fastened to a slider 174 movably provided along the slide rail 173 to move along the trajectory of the slide rail 173.

[0063] The motor 175 is connected to a power generation unit, such as a separate external power source or a built-in battery, to be supplied with power. The motor 175 generates torque to provide a driving force to the rotating unit 176.

[0064] The rotating unit 176 is connected to the motor 175 and is configured to convert the rotational motion from the motor 175 into a linear reciprocating motion. That is, the rotational motion of the motor 175 can be converted into a linear reciprocating motion of the structure fixed to the rotating unit 176. For example, the rotating unit 176 can be implemented by a ball screw including a shaft and a nut fastened to the shaft, but is not limited thereto.

[0065] The motor 175 and the rotating unit 176 interact with the link unit 171 to lift and lower the display unit DP. The link unit 171 is formed in a link structure to receive the driving force from the motor 175 and the rotating unit 176 to repeatedly fold or unfold.

[0066] Specifically, when the display unit DP is wound, the motor 175 is driven so that the structure of the rotating unit 176 can perform a linear motion. That is, the part of the rotating unit 176 coupled to one end of the second link 171b can perform a linear motion. Therefore, one end of the second link 171b can move toward the motor 175, and the plurality of links 171a and 171b are folded so that the height of the link unit 171 can be reduced. In addition, while the plurality of links 171a and 171b are folded, the head rod 172 coupled to the first link 171a also descends, and one end of the display unit DP coupled to the head rod 172 also descends.

[0067] When the display unit DP is unwound, the motor 175 is driven so that the structure of the rotating unit 176 can perform a linear motion. That is, the portion of the rotating unit 176 coupled to one end of the second link 171b can perform a linear motion. Accordingly, one end of the second link 171b can move away from the motor 175, and the plurality of links 171a and 171b are unfolded so that the height of the link unit 171 can be increased. In addition, when the plurality of links 171a and 171b are unfolded, the head rod 172 coupled to the first link 171a is also lifted, and one end of the display unit DP coupled to the head rod 172 is also lifted.

[0068] Accordingly, when the display unit DP is fully wound around the roller 181, the link unit 171 of the lifting unit 170 remains in a folded state. That is, when the display unit DP is fully wound around the roller 181, the lifting unit 170 can have a minimum height. When the display unit DP is fully unwound, the link unit 171 of the lifting unit 170 remains in an unfolded state. That is, when the display unit DP is fully unwound, the lifting unit 170 can have a maximum height.

[0069] Meanwhile, when the display unit DP is wound, the roller 181 can rotate, and the display unit DP can be wound around the roller 181. Refer to Figure 3 , the lower edge of the display unit DP is coupled to the roller 181. When the roller 181 rotates in the first direction DR1, that is, the clockwise direction, the display unit DP can be wound while the rear surface of the display unit DP is in close contact with the surface of the roller 181.

[0070] When the display unit DP is unwound, the roller 181 can rotate, and the display unit DP can be unwound from the roller 181. For example, refer to Figure 3 , when the roller 181 rotates in the second direction DR2, that is, the counterclockwise direction, the display unit DP wound around the roller 181 is unwound from the roller 181 to be disposed outside the housing unit HP.

[0071] In some exemplary embodiments, a driving unit MP having a structure other than the above-described driving unit MP may be applied to the display device 100. That is, as long as the display unit DP can be wound and unwound, the above-described configurations of the roller unit 180 and the lifting unit 170 can be modified, some configurations can be omitted, or additional configurations can be added.

[0072] Figure 4 and Figure 5 are a plan view of a display unit of a display device according to an exemplary embodiment of the present disclosure. Figure 6 is a cross-sectional view of a display device according to an exemplary embodiment of the present disclosure. Refer to Figures 4 to 6, the display unit DP includes a back cover 110, a display panel 120, a plurality of flexible films 130, a plurality of source printed circuit boards 140, a control printed circuit board 150, a wiring sheet 160, and a cover unit 190. For convenience of description, in Figure 4 the cover unit 190 is not shown, and in Figure 6 only the display unit DP and the roller 181 are shown.

[0073] Referring to Figure 4 and Figure 5 , the back cover 110 is disposed on the rear surface of the display panel 120 to support the display panel 120, the plurality of flexible films 130, and the plurality of source printed circuit boards 140. The size of the back cover 110 may be larger than the size of the display panel 120. The back cover 110 may protect other structures of the display unit DP from external influences.

[0074] Even if the back cover 110 is formed of a material having stiffness, at least a part of the back cover 110 may be flexible to wind or unwind together with the display panel 120. For example, the back cover 110 may be formed of a metallic material such as stainless steel (SUS) or invar, plastic, etc. However, if the material of the back cover 110 satisfies physical conditions such as thermal strain, radius of curvature, and stiffness, the material may be changed differently according to the design, and is not limited thereto.

[0075] The back cover 110 includes a plurality of support regions PA and a stretchable region MA. The plurality of support regions PA are regions where a plurality of openings 111 are not provided, and the stretchable region MA is a region where a plurality of openings 111 are provided. For example, a first support region PA1, a stretchable region MA, and a second support region PA2 are sequentially provided from the uppermost end of the back cover 110. A plurality of fastening holes are formed in each of the plurality of support regions PA. Specifically, in the first support region PA1, a first fastening hole AH1 is formed, and in the second support region PA2, a second fastening hole AH2 and a third fastening hole AH3 are formed.

[0076] The first support region PA1 is the uppermost region of the back cover 110 and is fastened to the head rod 172. The first support region PA1 may include the first fastening hole AH1 to be fastened to the head rod 172. For example, a screw passing through the head rod 172 and the first fastening hole AH1 is provided such that the head rod 172 can be fastened to the first support region PA1 of the back cover 110. Since the first support region PA1 is fastened to the head rod 172, when the link unit 171 fastened to the head rod 172 is lifted or lowered, the back cover 110 can also be lifted and lowered together with the display panel 120 attached to the back cover 110.

[0077] The extensible region MA is a region that extends from the first support region PA1 to the lower side of the back cover 110. The extensible region MA is a region where a plurality of openings 111 are provided and the display panel 120 is attached. Specifically, the extensible region MA is a region that winds around or unwinds from the roller 181 together with the display panel 120. The extensible region MA may overlap at least the display panel 120 among other structures of the display unit DP.

[0078] The second support region PA2 extends from the extensible region MA to the lower side of the back cover 110. The second support region PA2 is a region where the cover unit 190 and the wiring sheet 160 are fastened. In the second support region PA2, a second fastening hole AH2 and a third fastening hole AH3 may be formed to fasten the cover unit 190 and the wiring sheet 160. For example, screws passing through the cover unit 190 and the second fastening hole HA2 and the third fastening hole AH3 are provided such that the cover unit 190 and the second support region PA2 of the back cover 110 are fastened to each other. Screws passing through the wiring sheet 160 and the third fastening hole AH3 are provided such that the wiring sheet 160 can be fastened to the second support region PA2.

[0079] Meanwhile, in Figure 4 although the plurality of support regions PA and the extensible region MA of the back cover 110 are shown to be sequentially arranged in the column direction, when the back cover 110 is wound in the row direction, the plurality of support regions PA and the extensible region MA may be arranged in the row direction.

[0080] Although in Figure 4 and Figure 5 five first fastening holes AH1, two second fastening holes AH2 and three third fastening holes AH3 are shown, the numbers of the first fastening hole AH1, the second fastening hole AH2 and the third fastening hole AH3 are not limited thereto. In addition, in Figure 4 it is described that the back cover 110 is fastened to the head rod 172 using the first fastening hole AH1, and is fastened to the cover unit 190 and the wiring sheet 160 using the second fastening hole AH2 and the third fastening hole AH3. However, the present disclosure is not limited thereto, and the back cover 110 may be fastened to the head rod 172, the wiring sheet 160 and the cover unit 190 without using separate fastening holes.

[0081] Meanwhile, when the display unit DP is wound or unwound, the plurality of openings 111 provided in the stretchable area MA of the back cover 110 may be deformed due to the stress applied to the display unit DP. Specifically, when the display unit DP is wound or unwound, the stretchable area MA of the back cover 110 may be deformed as the plurality of openings 111 contract or expand. In addition, as the plurality of openings 111 contract or expand, the slipping phenomenon of the display panel 120 provided on the stretchable area MA of the back cover 110 is minimized, so that the stress applied to the display panel 120 can be minimized.

[0082] When the display panel 120 and the back cover 110 are wound, a difference may occur between the length of the display panel 120 wound around the roller 181 and the length of the back cover 110 wound around the roller 181 due to the difference in the radius of curvature of the display panel 120 and the back cover 110. For example, when the back cover 110 and the display panel 120 are wound around the roller 181, the length of the back cover 110 required to wind one turn around the roller 181 may be different from the length of the display panel 120 required to wind one turn around the roller 181. That is, since the display panel 120 is disposed further outside than the back cover 110 with respect to the roller 181, the length of the display panel 120 required to wind one turn around the roller 181 may be greater than the length of the back cover 110 required to wind one turn around the roller 181. As described above, during the winding of the display unit DP, the winding lengths of the back cover 110 and the display panel 120 are different from each other due to the difference in the radius of curvature, and the display panel 120 attached to the back cover 110 may slide to move from its original position. In this case, the phenomenon in which the display panel 120 slides from the back cover 110 due to the stress caused by winding and the difference in the radius of curvature may be defined as a slipping phenomenon. When the slipping phenomenon increases excessively, the display panel 120 may be separated from the back cover 110, or defects such as cracks may occur.

[0083] Meanwhile, in the first support region PA1 and the second support region PA2, a plurality of openings 111 formed in the extensible region MA are not formed. Specifically, only the first fastening hole AH1, the second fastening hole AH2, and the third fastening hole AH3 are formed in the first support region PA1 and the second support region PA2, but a plurality of openings 111 formed in the extensible region MA are not formed in the first support region PA1 and the second support region PA2. In addition, the first fastening hole AH1, the second fastening hole AH2, and the third fastening hole AH3 have shapes different from those of the plurality of openings 111. The first support region PA1 is a region fixed to the head rod 172, and the second support region PA2 is a region connected to the cover unit 190 and the wiring piece 160, and the first support region PA1 and the second support region PA2 may have a higher stiffness than the extensible region MA. Therefore, in order for the first support region PA1 and the second support region PA2 to have stiffness, a plurality of openings 111 may not be formed in the first support region PA1 and the second support region PA2.

[0084] In the display device 100 according to an exemplary embodiment of the present disclosure, even when the display unit DP is wound or unwound and stress is applied to the display unit DP, the plurality of openings 111 of the back cover 110 can be flexibly deformed. Therefore, the stress applied to the back cover 110 and the display panel 120 can be reduced. For example, when the back cover 110 and the display panel 120 are wound around the roller 181 in the column direction, stress that deforms the back cover 110 and the display panel 120 in the vertical direction can be applied. In this case, the plurality of openings 111 of the back cover 110 can extend in the vertical direction of the back cover 110, and the length of the back cover 110 can also be flexibly deformed. Therefore, the difference in the lengths of the back cover 110 and the display panel 120 caused by the difference in the radius of curvature during the process of winding the back cover 110 and the display panel 120 can be compensated by the plurality of openings 111 of the back cover 110. In addition, the stress applied from the back cover 110 to the display panel 120 due to the deformation of the plurality of openings 111 during the process of winding the back cover 110 and the display panel 120 can also be reduced.

[0085] The display panel 120 is disposed on one surface of the back cover 110. The display panel 120 is disposed on one surface of the back cover 110, in the extensible region MA. For example, the display panel 120 can be attached to the back cover 110 through an adhesive layer.

[0086] The display panel 120 is a panel for displaying an image to a user. The display panel 120 may include display elements for displaying an image, driving elements for driving the display elements, wirings for transmitting various signals to the display elements and the driving elements, and the like.

[0087] The display element can be defined in different ways according to the type of the display panel 120. For example, when the display panel 120 is an organic light-emitting display panel, the display element can be an organic light-emitting diode 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 can be a liquid crystal display element. In addition, since the display device 100 according to the exemplary embodiment of the present disclosure is a rollable display device, the display panel 120 can be implemented as a flexible display panel 120 to wind around or unwind from the roller 181.

[0088] Referring to Figure 4 , the display panel 120 includes an active area AA and a non-active area NA.

[0089] The active area AA is an area of the display panel 120 where an image is displayed. In the active area AA, a plurality of sub-pixels constituting a plurality of pixels and a driving circuit for driving the plurality of sub-pixels can be provided. The plurality of sub-pixels are the smallest units constituting the active area AA, and a display element can be provided in each of the plurality of sub-pixels. For example, the driving circuit for driving the plurality of sub-pixels can include driving elements, wirings, etc. For example, the driving circuit can be composed of thin film transistors, storage capacitors, gate lines, data lines, etc., but is not limited thereto.

[0090] The non-active area NA is an area where no image is displayed. In the non-active area NA, various wirings, circuits, etc. for driving the display elements in the active area AA are provided. For example, in the non-active area NA, link lines for transmitting signals to the plurality of sub-pixels and the driving circuit in the active area AA or driving ICs such as a gate driver IC or a data driver IC can be provided, but the non-active area is not limited thereto.

[0091] At least one or more flexible films 130 are provided at one end of the display panel 120. For example, one or more flexible films 130 can be provided according to the design. Hereinafter, for convenience of description, even if a plurality of flexible films 130 are described, the number of the flexible films 130 can vary according to the design and is not limited thereto.

[0092] The plurality of flexible films 130 can be electrically connected to the non-active area NA at one end of the display panel 120. The plurality of flexible films 130 are films in which various components are provided on a stretchable base film to supply signals to the plurality of sub-pixels and the driving circuit in the active area AA and can be electrically connected to the display panel 120. One end of the plurality of flexible films 130 is provided in the non-active area NA of the display panel 120 to supply a power supply voltage or a data voltage to the plurality of sub-pixels and the driving circuit in the active area AA.

[0093] Meanwhile, driving ICs such as gate driver ICs or data driver ICs may be provided on the plurality of flexible films 130. The driving IC is a component that processes data for displaying an image and driving signals for processing the data. The driving IC may be provided by chip - on - glass (COG), chip - on - film (COF), or tape - carrier package (TCP) technology according to the installation method. However, for ease of description, it is described that the driving IC is mounted on the plurality of flexible films 130 by chip - on - film technology, but it is not limited thereto.

[0094] A plurality of source printed circuit boards 140 electrically connected to the plurality of flexible films 130 are provided. The plurality of source printed circuit boards 140 are provided on the second support area PA2 of the back cover 110 to be connected to the plurality of flexible films 130. The plurality of source printed circuit boards 140 are components that supply signals to the driving IC. Various components may be provided in the plurality of source printed circuit boards 140 to supply various signals such as driving signals or data signals to the driving IC. Meanwhile, Figure 4 shows that four source printed circuit boards 140 are provided, and each source printed circuit board 140 is connected to two flexible films 130. However, the number of the plurality of source printed circuit boards 140 may vary according to the design and is not limited thereto. For example, only one source printed circuit board 140 may be provided.

[0095] Referring together to Figure 5 and Figure 6 , a cover unit 190 covering the plurality of source printed circuit boards 140 and the plurality of flexible films 130 is provided. The cover unit 190 may be provided to cover at least the second support area PA2 of the back cover 110. For example, the cover unit 190 may cover a part of the non - active area NA adjacent to the second support area PA2 of the display panel 120, as well as the plurality of flexible films 130 and the plurality of source printed circuit boards 140 provided in the second support area PA2. By doing so, the cover unit 190 can protect the display panel 120, the plurality of flexible films 130, and the plurality of source printed circuit boards 140 from external impacts.

[0096] The cover unit 190 includes a substrate 191 and a cover plate 192.

[0097] The substrate 191 is disposed on the opposite surface of one surface of the back cover 110. The substrate 191 may be fixed to the second support area PA on the opposite surface of one surface of the back cover 110 where the display panel 120 is not provided. The substrate 191 may be disposed to overlap with the plurality of source printed circuit boards 140, with the back cover 110 therebetween. The substrate 191 may support the plurality of source printed circuit boards 140 provided in the second support area PA2. For example, the substrate 191 is formed of a material having rigidity to support the second support area PA2 to be flat, but it is not limited thereto.

[0098] The cover plate 192 is disposed on one surface of the back cover 110. The cover plate 192 may be disposed to cover at least a plurality of source printed circuit boards 140 among the components of the display unit DP. For example, the cover plate 192 may be disposed to cover the non-active area NA of the display panel 120, the plurality of flexible films 130, and the plurality of source printed circuit boards 140. The cover plate 192 may be fixed to the second support area PA2 and the substrate 191 on one surface of the back cover 110 where the display panel 120 and the plurality of source printed circuit boards 140 are disposed. The cover plate 192 may be formed with a convex surface, that is, a curved surface. The cover plate 192 is formed of a material having rigidity to protect the plurality of source printed circuit boards 140, but is not limited thereto.

[0099] Meanwhile, the cover unit 190 and the back cover 110 may be fixed to each other. For example, the second fastening holes AH2 and the third fastening holes AH3 are formed in the second support area PA2, and the protrusions protruding from the substrate 191 are inserted into the second fastening holes AH2 and the third fastening holes HA3 to fix the cover unit 190 and the back cover 110. In addition, as another example, the cover unit 190 and the back cover 110 may be fixed to each other by a member such as a screw passing through the substrate 191, the cover plate 192, and the back cover 110. At this time, a fastening member such as a screw may be provided so as not to interfere with the plurality of source printed circuit boards 140. However, the cover unit 190 and the back cover 110 may be fixed by various methods, but are not limited thereto.

[0100] The cover unit 190 is formed of a material having rigidity to maintain its original state without being bent when the display unit DP is wound to protect the plurality of source printed circuit boards 140. When the display unit DP is wound, the cover plate 192 does not deform, but maintains its original convex shape to protect the plurality of source printed circuit boards 140, thereby suppressing a part of the display panel 120 and the back cover 110 wound on the cover plate 192 so as not to affect the plurality of source printed circuit boards 140. The cover plate 192 having a curved surface may form a circle with the curved portion 181R of the roller 181, and the remaining components of the display unit DP wound on the cover unit 190 may be wound with a predetermined curvature.

[0101] Next, when the display unit DP is wound, the substrate 191 of the cover unit 190 having rigidity maintains a flat state without being bent to protect the source printed circuit boards 140. A part of the roller 181 around which the substrate 191 is wound may be formed as a flat surface so that the substrate 191 does not bend. For example, the substrate 191 is located on the flat portion 181F of the roller 181 so as to maintain a flat state without bending even when the display unit DP is wound.

[0102] Refer to Figure 4 and Figure 6, a wiring sheet 160 is disposed between the back cover 110 and the roller 181. One end of the wiring sheet 160 is fastened to the second support area PA2 of the back cover 110, and the other end is fastened to the roller 181. The wiring sheet 160 can connect the back cover 110 and the display panel 120 to the roller 181, and the wiring sheet 160, the back cover 110, and the display panel 120 wind around or unwind from the roller 181 according to the rotation of the roller 181. The wiring sheet 160 can electrically connect a plurality of source printed circuit boards 140 to a control printed circuit board 150 described below.

[0103] The wiring sheet 160 may include a plurality of wirings 162 and a pair of sheets 161 to which the plurality of wirings 162 are joined therebetween.

[0104] The plurality of wirings 162 include a first wiring 163, a second wiring 164, and a ground wire 165. The first wiring 163 is a wiring that electrically connects a plurality of source printed circuit boards 140 to the control printed circuit board 150. At least a part of the first wiring 163 extends outside the pair of sheets 161 to connect to the plurality of source printed circuit boards 140 and the control printed circuit board 150. One end of the first wiring 163 extends outside the pair of sheets 161 to connect to one of the plurality of source printed circuit boards 140, and the other end extends outside the pair of sheets 161 to connect to the control printed circuit board 150 in the roller 181. Although two first wirings 163 are shown in the drawings, one or more first wirings 163 may be provided according to the design, and the number of the first wirings 163 is not limited thereto.

[0105] The second wiring 164 is a wiring that electrically connects a plurality of source printed circuit boards 140. The second wiring 164 can electrically connect the source printed circuit boards 140 connected to the control printed circuit board 150 through the first wiring 163 to the source printed circuit boards 140 not directly connected to the control printed circuit board 150. One end and the other end of the second wiring 164 extend outside the pair of sheets 161 to electrically connect adjacent source printed circuit boards 140. Therefore, the source printed circuit board 140 provided with a signal from the control printed circuit board 150 can transmit the signal to an adjacent source printed circuit board 140 through the second wiring 164.

[0106] The ground wire 165 is a wiring that electrically connects some components of the display unit DP and the roller 181 to release static electricity that may be generated in the display unit DP. The roller 181 is electrically grounded, and the roller 181 is electrically connected to the display unit DP to release static electricity generated by friction caused by repeated winding and unwinding. For example, the ground wire 165 is connected to a plurality of source printed circuit boards 140 and the cover unit 190 among the components of the display unit DP and the roller 181 to release static electricity generated in the display unit DP. However, other components except the roller 181 may be grounded, and the ground wire 165 may be connected to other components except the plurality of source printed circuit boards 140 and the cover unit 190, but not limited thereto.

[0107] A pair of sheets 161 may be joined to each other, and the first wiring 163 and the second wiring 164 are located therebetween. The pair of sheets 161 may be a flexible film formed of plastic. For example, the pair of sheets may be formed of a plastic material such as polyethylene (PE), polyethylene terephthalate (PET), polyvinyl chloride (PVC), polyvinyl alcohol (PVA), polycarbonate (PC), polystyrene (PS), or polyurethane (PUR), but not limited thereto.

[0108] The pair of sheets 161 surrounds a plurality of wirings 162 to protect the plurality of wirings 162 and connects the back cover 110 and the roller 181 to allow the back cover 110 and the display panel 120 to be wound around the roller 181. At this time, in the pair of sheets 161, a plurality of fourth fastening holes AH4 and fifth fastening holes AH5 may be formed. For example, the plurality of fourth fastening holes AH4 may be formed in the upper part of the pair of sheets 161 to be fastened to the second support area PA2 of the back cover 110. The plurality of fifth fastening holes AH5 may be formed in the lower part of the pair of sheets 161 to be fastened to the roller 181. Therefore, the pair of sheets 161 may be fastened to the back cover 110 and the roller 181 through the plurality of fourth fastening holes AH4 and fifth fastening holes AH5.

[0109] At this time, the wiring sheet 160, the back cover 110, and the cover unit 190 may be fastened through the plurality of fourth fastening holes AH4 of the wiring sheet 160 and the plurality of third fastening holes AH3 of the back cover 110. For example, screws passing through the plurality of third fastening holes AH3, the plurality of fourth fastening holes AH4, and the cover unit 190 are provided to fix the wiring sheet 160, the back cover 110, and the cover unit 190. However, the wiring sheet 160 may be fastened to only any one of the back cover 110 and the cover unit 190, and may be fastened to the back cover 110 by a different method, but not limited thereto.

[0110] However, although three fourth fastening holes AH4 and seven fifth fastening holes AH5 are shown in the drawings, the numbers of the fourth fastening holes AH4 and the fifth fastening holes AH5 are not limited thereto. In addition, in the drawings, it has been described that the third fastening hole AH3 and the fourth fastening hole AH4 are used to fasten the wiring sheet 160, the back cover 110, and the cover unit 190, and the wiring sheet 160 and the roller 181 are fastened using the fifth fastening hole AH5. However, the present disclosure is not limited thereto, and the back cover 110, the wiring sheet 160, and the roller 181 may be fastened to each other without using separate fastening holes.

[0111] The control printed circuit board 150 is disposed in the roller 181. The control printed circuit board 150 supplies various control signals to the plurality of source printed circuit boards 140. For example, a timing controller or the like is installed in the control printed circuit board 150 to supply various control signals to the plurality of source printed circuit boards 140.

[0112] The spring 183 is disposed in the roller 181. The spring 183 is disposed in the roller 181 to be connected to the rotation shaft 184 of the roller 181. One end of the spring 183 is connected to the inner circumferential surface of the roller 181, and the other end of the spring 183 is connected to the rotation shaft 184. One end of the spring 183 rotates in the clockwise or counterclockwise direction according to the rotation direction of the roller 181 to store energy in the spring 183. The energy stored in the spring 183 can assist the rotation of the roller 181 and assist the display unit DP to smoothly wind around the roller 181 or smoothly unwind from the roller 181.

[0113] Meanwhile, in the roller 181, the spring 183 may be disposed in the middle of the roller 181, and the control printed circuit board 150 may be disposed adjacent to the side surface of the roller 181. When the spring 183 is disposed to be inclined to the left or right instead of in the middle of the roller 181, it is difficult to uniformly transfer the energy stored in the spring 183 to the entire roller 181, and the display unit DP may be wound around the roller 181 in an inclined manner. Therefore, the spring 183 is disposed in the middle of the roller 181 to uniformly transfer the energy to the entire roller 181 and wind the display unit DP around the roller 181 without being biased.

[0114] Meanwhile, according to related technologies, the sheet connecting the back cover and the roller and the flexible flat cable serving as the wiring connecting multiple source printed circuit boards and the control printed circuit board are separately arranged. In this case, due to the curvature difference between the sheet and the cable, the length of the cable needs to be adjusted. However, due to the length adjustment error of the cable, problems such as the cable being separated from the source printed circuit board and the control printed circuit board or being bent relative to the source printed circuit board and the control printed circuit board may occur. In addition, in order to set the spring in the middle of the roller, the control printed circuit board needs to be moved to the left or right of the roller. However, according to the movement of the control printed circuit board, the length of the cable increases and the cable is bent. Therefore, in the case where the length of the cable increases and the cable is bent, when the display device is wound, the thickness of the display device increases, and the reliability during winding and unwinding may be reduced.

[0115] Therefore, in the display device 100 according to an exemplary embodiment of the present disclosure, the wiring connecting multiple source printed circuit boards 140 and the control printed circuit board 150 and the sheet connecting the back cover 110 and the roller 181 are integrated to simplify the structure of the display device 100. The wiring sheet 160 can connect the back cover 110 and the roller 181 simultaneously and connect the source printed circuit board 140 and the control printed circuit board 150 to each other. In this case, multiple wirings 162 and a pair of sheets 161 are integrally arranged, so that it is not necessary to consider the curvature difference between the multiple wirings 162 and the pair of sheets 161. In addition, the thickness of the wiring does not increase according to the direction switching of the multiple wirings 162, so that the multiple wirings 162 can be arranged in various ways, and the position of the control printed circuit board 150 in the roller 181 can be easily changed. Therefore, in the display device 100 according to an exemplary embodiment of the present disclosure, the wiring sheet 160 in which the multiple wirings 162 are arranged between a pair of sheets 161 is used to stably connect the multiple source printed circuit boards 140 and the control printed circuit board 150. In addition, the multiple wirings 162 can be arranged between the pair of sheets 161 in various ways, so that the positions of the control printed circuit board 150 and the spring 183 in the roller 181 can be easily changed, and the deformation of the display unit DP wound around the roller 181 can be minimized.

[0116] Figure 7 is a plan view of a display device according to another exemplary embodiment of the present disclosure. Figure 7 The display device 700 of... and the display device 100 of... Figure 6 The only difference between them is the position of the multiple wirings 762, but other configurations are basically the same, so redundant descriptions will be omitted.

[0117] Referring to... Figure 7 As shown in..., the wiring sheet 760 includes multiple wirings 762, and the multiple wirings 762 include a first wiring 763, a second wiring 764, and a ground wire 165.

[0118] The first wiring 763 is a wiring that electrically connects a plurality of source printed circuit boards 140 to the control printed circuit board 150. The first wiring 763 can be connected to the source printed circuit board 140 among the plurality of source printed circuit boards 140 that is closest to the control printed circuit board 150. For example, when the control printed circuit board 150 is disposed on the left side of the roller 181, the first wiring 763 can be connected between the leftmost source printed circuit board 140 among the plurality of source printed circuit boards 140 and the control printed circuit board 150. Accordingly, the first wiring 763 can extend straight between the source printed circuit board 140 and the control printed circuit board 150.

[0119] The plurality of second wirings 764 are wirings that connect the plurality of source printed circuit boards 140 to each other. The plurality of second wirings 764 can electrically connect the source printed circuit board 140 provided with the signal from the control printed circuit board 150 and the remaining source printed circuit boards 140. For example, the plurality of second wirings 764 can include a second wiring 764 that connects the first source printed circuit board 140 and the second source printed circuit board 140 starting from the left, a second wiring 764 that connects the second source printed circuit board 140 and the third source printed circuit board 140, and a second wiring 764 that connects the third source printed circuit board 140 and the fourth source printed circuit board 140.

[0120] In the display device 700 according to another exemplary embodiment of the present disclosure, the first wiring 763 is disposed between the source printed circuit board 140 among the plurality of source printed circuit boards 140 that is closest to the control printed circuit board 150 and the control printed circuit board 150. By doing so, the structure of the first wiring 763 can be simplified. When the first wiring 763 is connected to the source printed circuit board 140 having the shortest straight-line distance from the control printed circuit board 150 among the plurality of source printed circuit boards 140, the length of the first wiring 763 can be reduced, and the first wiring 763 can be configured as a straight line. Accordingly, the structure of the first wiring 763 can be simplified. If the first wiring 763 is connected to the source printed circuit board 140 having the longest straight-line distance from the control printed circuit board 150 among the plurality of source printed circuit boards 140, the length of the first wiring 763 needs to be increased. In addition, the layout and shape of the second wiring 764 connecting the adjacent source printed circuit boards 140 need to be designed in consideration of the first wiring 763. Accordingly, in the display device 700 according to another exemplary embodiment of the present disclosure, the first wiring 763 is formed to connect the source printed circuit board 140 having the shortest straight-line distance from the control printed circuit board 150 among the plurality of source printed circuit boards 140 to the control printed circuit board 150. By doing so, the structure of the plurality of wirings 762 can be simplified.

[0121] Figure 8is a plan view of a display device according to another exemplary embodiment of the present disclosure. Compared with Figure 7 the display device 700 of Figure 8 the display device 800 basically has the same configuration, except that the wiring piece 860 does not include the second wiring 764, but is further provided with a connection line CL. Therefore, redundant descriptions will be omitted.

[0122] Referring to Figure 8 , the wiring piece 860 includes a pair of pieces 161 and a plurality of wirings 862. The plurality of wirings 862 includes a first wiring 763 and a ground wire 165. A plurality of source printed circuit boards 140 and a control printed circuit board 150 can be electrically connected through the first wiring 763. Therefore, the wiring piece 860 can electrically connect the control printed circuit board 150 and the plurality of source printed circuit boards 140 at the same time, and connect the back cover 110 and the roller 181.

[0123] The connection line CL is provided between the plurality of source printed circuit boards 140 to electrically connect the plurality of source printed circuit boards 140. The connection line CL can electrically connect the source printed circuit board 140 provided with the signal from the control printed circuit board 150 and the remaining source printed circuit boards 140. For example, when the control printed circuit board 150 and the first source printed circuit board 140 from the left are electrically connected through the first wiring 763, a connection line CL connecting the first source printed circuit board 140 and the second source printed circuit board 140, a connection line CL connecting the second source printed circuit board 140 and the third source printed circuit board 140, and a connection line CL connecting the third source printed circuit board 140 and the fourth source printed circuit board 140 can be provided. At this time, the connection line CL extends in the row direction to connect to the side portions of each of the source printed circuit boards 140, so that the connection line does not overlap with the wiring piece 860.

[0124] In a display device 800 according to yet another exemplary embodiment of the present disclosure, a second wiring connecting a plurality of source printed circuit boards 140 is removed from a wiring sheet 860, and a separate connection line CL is used to simplify the structure of the wiring sheet 860. Signals from a control printed circuit board 150 may be transmitted to the plurality of source printed circuit boards 140. However, each of the plurality of source printed circuit boards 140 is not connected to the control printed circuit board 150 one-to-one, but only one source printed circuit board 140 may be directly electrically connected to the control printed circuit board 150. The source printed circuit board 140 directly connected to the control printed circuit board 150 may be connected to another source printed circuit board 140 through the connection line CL. At this time, the connection line CL may connect the source printed circuit boards 140 at the shortest distance on the sides of the plurality of source printed circuit boards 140. Accordingly, in the display device 800 according to yet another exemplary embodiment of the present disclosure, only the first wiring 763 and the ground line 165 may be provided in the wiring sheet 860 without providing a separate wiring connecting the source printed circuit boards 140, and the structure of the wiring sheet 860 may be simplified.

[0125] Figure 9 is a plan view of a display device according to yet another exemplary embodiment of the present disclosure. Figure 10 is an enlarged plan view of a display device according to various exemplary embodiments of the present disclosure. Figure 10 is a plan view of an enlarged wiring sheet including a plurality of holes. Compared with Figure 7 the display device 700 of Figure 9 and Figure 10 the display device 900 of

[0126] basically has the same configuration, except that the wiring sheet 960 further includes a plurality of holes 966, 966a, and 966b, and thus redundant descriptions will be omitted.

[0126] Referring to Figure 9 the wiring sheet 960 includes a plurality of holes 966. In the wiring sheet 960, the plurality of holes 966 may be provided at intervals from a plurality of wirings 762. The longitudinal direction of the plurality of holes 966 may be perpendicular to the longitudinal direction of the roller 181. That is, the plurality of holes 966 may be provided in a direction perpendicular to the longitudinal direction of the roller 181. In addition, the width of the plurality of holes 966 in the column direction may be greater than the width in the row direction. For example, the plurality of holes 966 may have an elliptical shape with a major axis in the column direction.

[0127] The widths of the plurality of holes 966 in the column direction are relatively large, such that the plurality of holes can be easily contracted or expanded in the row direction. Accordingly, the plurality of holes 966 can extend in the row direction, and the length of the wiring piece 960 in the row direction can be flexibly deformed. Even if an alignment error of the plurality of wirings 762 of the wiring piece 960 occurs, the alignment error can be compensated when the plurality of holes 966 are flexibly deformed. Specifically, as the size of the display device 900 increases, the length of the wiring piece 960 in the row direction can increase, and the number of source printed circuit boards 140 can also increase. At this time, an alignment error may occur at the connection positions of the plurality of wirings 762 of the wiring piece 960 and the source printed circuit board 140. For example, when the length of the wiring piece 960 in the row direction is shorter than designed, some of the plurality of wirings 762 are offset from the source printed circuit board 140 to be connected, so that it may be difficult to connect the plurality of wirings 762 and the source printed circuit board 140. However, the plurality of holes 966 contract or expand in the row direction, such that the wiring piece 960 can be flexibly deformed in the row direction, so that the offset plurality of wirings 762 and the source printed circuit board 140 can be easily aligned to compensate the alignment error.

[0128] Meanwhile, the plurality of holes 966 can be formed in various forms other than Figure 9 those shown. For example, in the wiring piece 960a of (a) in Figure 10 , the width of the plurality of holes 966a in the row direction is shorter than the width in the column direction, and the upper end and the lower end may be asymmetric with respect to the center. For example, in the wiring piece 960b of (b) in Figure 10 , the width of the plurality of holes 966b in the row direction is shorter than the width in the column direction, and the upper end and the lower end may be symmetric with respect to the center. For example, the plurality of holes 966b can be formed in a diamond shape.

[0129] In a display device 900 according to various exemplary embodiments of the present disclosure, a plurality of holes 966, 966a, and 966b are formed in wiring sheets 960, 960a, and 960b to compensate for alignment errors of a plurality of wirings 762. The plurality of holes 966, 966a, and 966b formed in the wiring sheets 960, 960a, and 960b are configured such that a width in a row direction is smaller than a width in a column direction so that the plurality of holes can be easily contracted or expanded in the row direction. In addition, the wiring sheets 960, 960a, and 960b can also be easily contracted or expanded in the row direction through the plurality of holes 966, 966a, and 966b. If the length of the wiring sheets 960, 960a, and 960b in the row direction has an error different from a design, the plurality of wirings 762 are offset from a source printed circuit board 140, and thus it may be difficult to connect the plurality of wirings 762 and the source printed circuit board 140. However, in the display device 900 according to various exemplary embodiments of the present disclosure, the wiring sheets 960, 960a, and 960b are contracted or expanded in the row direction through the plurality of holes 966, 966a, and 966b to compensate for alignment errors between the plurality of wirings 762 and the plurality of source printed circuit boards 140. In addition, the plurality of wirings 762, the plurality of source printed circuit boards 140, and a control printed circuit board 150 can be easily connected.

[0130] Exemplary embodiments of the present disclosure may also be described as follows:

[0131] A display device according to an aspect of the present disclosure may include: a display panel; a plurality of flexible films electrically connected to one end of the display panel; a plurality of source printed circuit boards electrically connected to the plurality of flexible films; a roller around which the display panel is wound or unwound; a control printed circuit board disposed in the roller; and a wiring sheet including a first wiring electrically connecting at least one of the plurality of source printed circuit boards and the control printed circuit board.

[0132] According to another feature of the present disclosure, the display device may further include a spring disposed in the roller, wherein the spring may be disposed in the middle of the roller, and the control printed circuit board may be disposed adjacent to a side surface of the roller.

[0133] According to still another feature of the present disclosure, the wiring sheet may include: a pair of sheets joined to each other with the first wiring therebetween; and a second wiring at least partially disposed between the pair of sheets and connecting the plurality of source printed circuit boards to each other.

[0134] According to still another feature of the present disclosure, the wiring sheet may further include a plurality of holes disposed in the pair of sheets.

[0135] According to yet another feature of the present disclosure, the display device may further include a connection line disposed between adjacent source printed circuit boards among the plurality of source printed circuit boards to electrically connect the plurality of source printed circuit boards.

[0136] According to yet another feature of the present disclosure, the display device may further include a back cover that supports the display panel on the rear surface of the display panel, wherein one end of the wiring piece is fastened to the back cover, and the other end of the wiring piece is fastened to the roller.

[0137] A display device according to another aspect of the present disclosure includes: a display panel; a plurality of source printed circuit boards electrically connected to the display panel; a control printed circuit board electrically connected to the plurality of source printed circuit boards; a wiring piece that electrically connects the plurality of source printed circuit boards and the control printed circuit board; and a roller that is connected to the wiring piece and houses the control printed circuit board therein, wherein a spring is disposed in the middle of the roller.

[0138] According to another feature of the present disclosure, the wiring piece may include: a first wiring that electrically connects one of the plurality of source printed circuit boards and the control printed circuit board; and a pair of pieces joined to each other, with the first wiring located therebetween, wherein one end of the first wiring extends from the pair of pieces into the roller.

[0139] According to yet another feature of the present disclosure, the wiring piece may further include a second wiring that is partially disposed between the pair of pieces to electrically connect the plurality of source printed circuit boards to each other.

[0140] According to yet another feature of the present disclosure, the display device may further include a connection line that electrically connects adjacent source printed circuit boards among the plurality of source printed circuit boards, wherein the connection line may extend in the row direction.

[0141] According to yet another feature of the present disclosure, the display device may further include a back cover that supports the display panel and the plurality of source printed circuit boards, wherein the back cover may be connected to the wiring piece in a region between the plurality of source printed circuit boards.

[0142] According to yet another feature of the present disclosure, the wiring piece may further include a ground wire that is disposed between the pair of pieces to electrically connect the plurality of source printed circuit boards and the roller.

[0143] According to yet another feature of the present disclosure, the wiring piece may further include a plurality of holes that are disposed in the pair of pieces to be spaced apart from the first wiring, wherein the longitudinal direction of the plurality of holes may be perpendicular to the longitudinal direction of the roller.

[0144] Although the exemplary embodiments of the present disclosure have been described in detail with reference to the accompanying drawings, the present disclosure is not limited thereto and can be implemented in many different forms without departing from the technical concept of the present disclosure. Therefore, the exemplary embodiments of the present disclosure are provided for illustrative purposes only and are not intended to limit the technical concept of the present disclosure. The scope of the technical concept of the present disclosure is not limited thereto. Therefore, it should be understood that the above exemplary embodiments are illustrative in all respects and do not limit the present disclosure. The protection scope of the present disclosure should be interpreted based on the appended claims, and all technical concepts within the scope of their equivalents should be construed as falling within the scope of the present disclosure.

Claims

1. A display device, comprising: A display panel; A plurality of flexible films electrically connected to one end of the display panel; A plurality of source printed circuit boards electrically connected to the plurality of flexible films; A roller around which the display panel is wound or unwound; A control printed circuit board disposed in the roller; A wiring sheet including a first wiring electrically connecting at least one of the plurality of source printed circuit boards and the control printed circuit board, and A back cover supporting the display panel on the rear surface of the display panel, Wherein one end of the wiring sheet is fastened to the back cover and the other end of the wiring sheet is fastened to the roller, Wherein the wiring sheet includes a pair of sheets joined to each other, and the first wiring is between the pair of sheets.

2. The display device according to claim 1, further comprising: A spring disposed in the roller, Wherein the spring is disposed in the middle of the roller, and the control printed circuit board is disposed adjacent to the side surface of the roller.

3. The display device according to claim 1, wherein, The wiring sheet further includes a second wiring at least partially disposed between the pair of sheets and connecting the plurality of source printed circuit boards to each other.

4. The display device according to claim 3, wherein, The wiring sheet further includes a plurality of holes disposed in the pair of sheets.

5. The display device according to claim 1, further comprising: A connection line disposed between adjacent source printed circuit boards among the plurality of source printed circuit boards to electrically connect the plurality of source printed circuit boards.

6. A display device, comprising: A display panel; A plurality of source printed circuit boards electrically connected to the display panel; A control printed circuit board electrically connected to the plurality of source printed circuit boards; A wiring sheet electrically connecting the plurality of source printed circuit boards and the control printed circuit board; A roller connected to the wiring sheet and accommodating the control printed circuit board and a spring therein, and A back cover supporting the display panel and the plurality of source printed circuit boards, wherein the back cover is connected to the wiring sheet in a region between the plurality of source printed circuit boards, Wherein the spring is disposed in the middle of the roller, Wherein the wiring sheet includes: A first wiring electrically connecting one of the plurality of source printed circuit boards and the control printed circuit board; and A pair of sheets joined to each other, with the first wiring between the pair of sheets, Wherein one end of the first wiring extends from the pair of sheets into the roller.

7. The display device according to claim 6, wherein, The wiring sheet further includes: A second wiring partially disposed between the pair of sheets to electrically connect the plurality of source printed circuit boards to each other.

8. The display device according to claim 6, further comprising: A connection line electrically connecting adjacent source printed circuit boards among the plurality of source printed circuit boards, Wherein the connection line extends in a row direction.

9. The display device according to claim 6, wherein, The wiring sheet further includes: A ground wire disposed between the pair of sheets to electrically connect the plurality of source printed circuit boards and the roller.

10. The display device according to claim 6, wherein, The wiring sheet further includes: A plurality of holes disposed in the pair of sheets and spaced apart from the first wiring, Wherein the length direction of the plurality of holes is perpendicular to the length direction of the roller.

11. A rollable display device, comprising: A display panel; A back cover that supports the display panel on the rear surface of the display panel, A flexible film electrically connected to one end of the display panel; A source printed circuit board electrically connected to the flexible film; A roller around which the display panel is wound or unwound; A control printed circuit board provided in the roller; And A wiring sheet including a pair of sheets joined to each other and a first wiring provided between the pair of sheets, wherein the pair of sheets connect the back cover and the roller, and wherein the first wiring electrically connects the source printed circuit board and the control printed circuit board.

12. The rollable display device according to claim 11, further comprising a spring provided in the middle of the roller, one end of the spring being connected to the inner circumferential surface of the roller and the other end of the spring being connected to the rotation shaft of the roller.

Images