Display Devices

Abstract

A display device is disclosed, comprising a display module and a housing. At least one roller is arranged in the housing. The display module is configured to be able to be wound around the at least one roller and to be inserted into and withdrawn from the housing. The display module comprises a display panel, a window on the display panel, and an adhesive layer between the display panel and the window. The adhesive layer comprises a first polymer layer having a positive charge and a second polymer layer having a negative charge. The second polymer layer is directly arranged on the first polymer layer.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the priority benefit of Korean Patent Application No. 10-2019-0046742 filed on April 22, 2019, in the Korean Intellectual Property Office, the disclosure of which is incorporated by reference in its entirety. Technical Field

[0003] The present disclosure relates to a rollable display device, and more particularly, to a rollable display device configured to reduce stress caused by a rolling operation and have high reliability. Background Art

[0004] Flexible display devices include curved display devices, foldable display devices, and rollable display devices, wherein the curved display device has a display surface configured to be bent to a fixed curvature, the foldable display device has a display surface configured to be bent to a specific curvature radius or greater or to bend along a folding axis, and the rollable display device is configured to be rolled at a specific curvature radius. In particular, since the rollable display device has good portability relative to the provided display area, many studies are being conducted to develop the rollable display device.

[0005] The display module of the rollable display device has a stacked structure in which various elements are stacked on each other. Some of the elements may be separated from each other or may be broken due to stress generated when the rollable display device is rolled up. Summary of the invention

[0006] Exemplary embodiments of the inventive concept provide a rollable display device that reduces stress applied to each of elements in a display module during a rolling operation and thus improves operational reliability of the display device.

[0007] According to an exemplary embodiment of the present invention, a display device includes a display module and a housing. At least one roller is disposed in the housing. The display module is configured to be able to be wound around at least one roller and to be inserted into and withdrawn from the housing. The display module includes a display panel, a window on the display panel, and an adhesive layer between the display panel and the window. The adhesive layer includes a first polymer layer having a positive charge and a second polymer layer having a negative charge. The second polymer layer is directly disposed on the first polymer layer.

[0008] In an exemplary embodiment, the adhesive layer may be directly disposed between the display panel and the window. The first polymer layer may include a cationic polymer, which may be obtained by polymerizing at least one of a monomer comprising a styrene group, a monomer comprising a diene group, a monomer comprising an acrylate group, a monomer comprising an aldehyde group, a monomer comprising an epoxy group, a monomer comprising an acrylonitrile group, and a monomer comprising a cyanoacryloyl group. The second polymer layer may include an anionic polymer, which may be obtained by polymerizing at least one of a monomer comprising an isobutylene group, a monomer comprising a styrene group, a monomer comprising a diene group, and a monomer comprising a vinyl alkyl ether. The adhesive layer may include an anionic layer and a cationic layer. The anionic layer may be directly disposed on the first polymer layer and may be spaced apart from the second polymer layer. The cationic layer may be directly disposed on the second polymer layer and may be spaced apart from the first polymer layer. The anionic layer may include OH - , O - and O 2 - At least one of the following. The cationic layer may include F + , O + , O 2 + , H + ,Ar + and N 2 + At least one of .

[0009] In an exemplary embodiment, the at least one roller may include one roller on which both the display panel and the window can be wound. The display device may further include at least one auxiliary roller spaced apart from the one roller to guide the display module.

[0010] In an exemplary embodiment, the housing may include a lower frame, an upper frame, and a side frame. The upper frame may be opposite to the lower frame, and an opening may be defined in the upper frame, into which the display module can be inserted and from which the side frame may be disposed between the lower frame and the upper frame.

[0011] In an exemplary embodiment, the at least one roller may include a first roller, a second roller, and a third roller. The window may be wound on the first roller, the display panel may be wound on the second roller, and the support substrate may be wound on the third roller.

[0012] In an exemplary embodiment, the adhesive layer may be directly disposed between the display panel and the window and between the support substrate and the display panel. When the display module is inserted into the housing, the first polymer layer and the second polymer layer may be separated from each other, and the display panel, the window, and the support substrate may be spaced apart from each other. When the display module is withdrawn from the housing, the first polymer layer and the second polymer layer may adhere to each other, and the display panel, the window, and the support substrate may be combined with each other to form a single object.

[0013] In an exemplary embodiment, when viewed in a plan view, the first to third rollers may be spaced apart from each other in a first direction, the first direction being a withdrawal direction of the display module. The first roller may be disposed between the second roller and the third roller. The first roller and the third roller may not overlap with the upper frame. The distance between the first roller and the second roller may be less than the distance between the second roller and the third roller. At least a portion of the second roller may overlap with the upper frame.

[0014] In an exemplary embodiment, the first to third rollers may be spaced apart from each other in a third direction, which is a thickness direction of the display module, and when viewed in a plan view, the first to third rollers may overlap at least a portion of the upper frame. The distance between the first roller and the lower frame may be smaller than the distance between the second roller and the lower frame. The distance between the second roller and the lower frame may be smaller than the distance between the third roller and the lower frame.

[0015] According to an exemplary embodiment of the present invention, a display device includes a display module, the display module includes a display panel, a window on the display panel, and an adhesive layer between the display panel and the window. The display device also includes a housing. The display module is configured to be inserted into and extracted from the housing. A first roller is disposed in the housing and is configured to be able to wind the window around the first roller. A second roller is disposed in the housing and is configured to be able to wind the display panel around the second roller. The adhesive layer includes a first polymer layer having a positive charge and a second polymer layer having a negative charge. The second polymer layer is directly disposed on the first polymer layer.

[0016] In an exemplary embodiment, when the display module is inserted into the housing, the first polymer layer and the second polymer layer may be separated from each other, and the display panel and the window may be spaced apart from each other. When the display module is pulled out of the housing, the first polymer layer and the second polymer layer may adhere to each other, and the display panel and the window may be combined with each other to form a single object.

[0017] In an exemplary embodiment, the display device may further include an ion generating component. The ion generating component may be disposed on the housing. When the display module is inserted into the housing, the ion generating component may provide positive ions and / or negative ions to the display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Exemplary embodiments will be more clearly understood from the following brief description taken in conjunction with the accompanying drawings.The accompanying drawings represent non-limiting exemplary embodiments described herein.

[0019] Figure 1 and Figure 2 is a perspective view illustrating a display device according to an exemplary embodiment of the inventive concept.

[0020] Figures 3 to 6 is along Figure 1 A cross-sectional view of a display module according to an exemplary embodiment of the inventive concept, taken along line II′ of FIG.

[0021] Figure 7 , Figure 8 , Fig. 9A , Fig. 10A and Fig. 10B is a cross-sectional view taken along line II-II′ showing a display device according to an exemplary embodiment of the inventive concept.

[0022] Fig. 9B According to an exemplary embodiment of the present invention Fig. 9A An enlarged view of part AA.

[0023] Fig.11 is a plan view illustrating a portion of a display device according to an exemplary embodiment of the inventive concept.

[0024] Fig. 12A is a diagram showing an exemplary embodiment according to the present inventive concept. Fig.11 2 is a cross-sectional view of a portion of the display device taken along line III-III'.

[0025] Fig. 12B is a cross-sectional view illustrating a portion of a display panel according to an exemplary embodiment of the inventive concept.

[0026] Fig.13 is along Figure 1 A cross-sectional view showing a display device according to an exemplary embodiment of the inventive concept, taken along line II-II′.

[0027] It should be noted that these drawings are intended to illustrate the general characteristics of the methods, structures and / or materials used in certain exemplary embodiments and to supplement the written description provided below. However, these drawings are not drawn to scale and may not accurately reflect the precise structure or performance characteristics of any given embodiment and should not be interpreted as defining or limiting the range of characteristics or values ​​covered by the exemplary embodiments. For example, the relative thickness and position of molecules, layers, regions and / or structural elements may be reduced or exaggerated for clarity. The use of similar or identical reference numerals in the various drawings is intended to indicate the presence of similar or identical elements or features. DETAILED DESCRIPTION

[0028] Exemplary embodiments of the present invention will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments are shown. However, exemplary embodiments of the present invention may be implemented in many different forms and should not be construed as being limited to the specific exemplary embodiments set forth herein. In the accompanying drawings, the thickness of layers and regions is exaggerated for clarity. The same reference numerals in the accompanying drawings represent the same elements, and therefore their descriptions will be omitted.

[0029] It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or directly coupled to the other element, or there can be an intermediate element. On the contrary, when an element is referred to as being "directly connected" or "directly coupled" to another element, there is no intermediate element. Throughout the text, the same number represents the same element. As used herein, the term "and / or" includes any and all combinations of one or more of the related listed items. Other words used to describe the relationship between elements or layers should be interpreted in a similar manner (e.g., "between" and "directly between", "adjacent" and "directly adjacent", "on" and "directly on", etc.).

[0030] It will be understood that although the terms "first", "second", etc. may be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Therefore, without departing from the teachings of the exemplary embodiments, the first element, first component, first region, first layer or first section described below may be referred to as the second element, second component, second region, second layer or second section.

[0031] For ease of description, spatially relative terms such as "below", "below", "lower", "above", "upper", etc. may be used herein to describe the relationship of an element (or elements) or feature (or features) to another element (or elements) or feature (or features) as shown in the drawings. It should be understood that in addition to the orientation depicted in the drawings, the spatially relative terms are intended to include different orientations of the device in use or operation. For example, if the device in the drawings is turned over, the elements described as being "below" or "below" other elements or features will then be oriented "above" the other elements or features. Therefore, the exemplary term "below" can include both above and below orientations. The device can be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0032] The terms used herein are only used for the purpose of describing specific exemplary embodiments and are not intended to limit the exemplary embodiments of the present inventive concept. As used herein, the singular forms "a", "an", and "the" are intended to also include the plural forms, unless the context clearly indicates otherwise. It will be further understood that if the terms "comprises", "comprising", "includes", and / or "including" are used herein, the presence of the features, wholes, steps, operations, elements, and / or components set forth is specified, but the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or groups thereof is not excluded.

[0033] Exemplary embodiments of the present invention are described herein with reference to cross-sectional views of schematic diagrams of idealized embodiments (and intermediate structures) of exemplary embodiments. Thus, variations in the illustrated shapes resulting from, for example, manufacturing techniques and / or tolerances are to be expected. Therefore, exemplary embodiments of the present invention should not be construed as being limited to the specific shapes of the regions shown herein, but should include deviations in shapes resulting from, for example, manufacturing.

[0034] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art. It should also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense unless explicitly defined as such herein.

[0035] Figure 1 and Figure 2 are perspective views each schematically illustrating a display device DD according to an exemplary embodiment of the inventive concept.

[0036] refer to Figure 1 and Figure 2 , the display device DD according to an exemplary embodiment of the inventive concept may be a rollable display device. The display device DD may include a display module DM, a housing HS, and at least one drum RM.

[0037] The display module DM may provide an image. The display module DM will be described in more detail below.

[0038] The display module DM may be accommodated in the housing HS. For example, the display module DM may be inserted into the housing HS or extracted (eg, pulled out) from the housing HS. Figure 1 The display module DM is shown inserted into the housing HS. Figure 2 FIG. 2 shows the display module DM being pulled out from the housing HS. Figure 1 to Figure 2 As shown in the exemplary embodiment of , the housing HS may include a lower frame DF, a side frame SF, an upper frame UF, and at least one drum RM.

[0039] The lower frame DF may extend in a first direction DR1 and a second direction DR2, the first direction DR1 being a withdrawal direction of the display module DM, and the second direction DR2 being non-parallel to the first direction DR1. For example, in an exemplary embodiment, the second direction DR2 may be orthogonal to the first direction DR1. However, exemplary embodiments of the present invention are not limited thereto. The upper frame UF may face the lower frame DF and may also extend in the first direction DR1 and the second direction DR2. The housing HS includes an opening OP through which the display module DM passes. In an exemplary embodiment, the opening OP may be defined in the upper frame UF. The side frame SF may be disposed between the upper frame UF and the lower frame DF. The side frame SF extends from the lower frame DF and the upper frame UF to connect the lower frame DF to the upper frame UF. For example, the side frame SF may extend in a third direction DR3 (e.g., a normal direction), the third direction DR3 being orthogonal to a plane defined by the first direction DR1 and the second direction DR2. However, exemplary embodiments of the present invention are not limited thereto. Figure 1 to Figure 2 The structure shown in the embodiment of the present invention can be modified in various ways, and the housing HS can be modified in various ways. For example, the lower frame DF, the side frame SF and the upper frame UF of the housing HS can have various shapes.

[0040] The drum RM may be disposed in the housing HS. In an exemplary embodiment, the drum RM may have a circular or elliptical cylindrical shape extending in the second direction DR2. However, exemplary embodiments of the present inventive concept are not limited thereto. The drum RM may rotate in a clockwise or counterclockwise direction around a rotation axis extending in the second direction DR2. Although Figure 1An example is shown in which one drum RM is disposed within the housing HS, but exemplary embodiments of the present inventive concept are not limited thereto, and in other exemplary embodiments, a plurality of drums may be disposed within the housing HS.

[0041] The end portion of the display module DM may be attached to the drum RM. When the drum RM rotates in a clockwise or counterclockwise direction, the display module DM may be wound around the drum RM. In an exemplary embodiment, the end portion of the display module DM may be attached to the display module DM by a pressure-sensitive adhesive. However, exemplary embodiments of the inventive concept are not limited thereto.

[0042] Figures 3 to 6 is along Figure 1 1 and 2 , taken along line II′ of FIG. 1 , illustrating a cross-sectional view of display modules DM, DM-a, DM-b, and DM-c according to an exemplary embodiment of the inventive concept.

[0043] refer to Figure 3 , the display module DM may include a display panel DP, a window WD and an adhesive layer ADH.

[0044] The display panel DP may provide an image. In an exemplary embodiment, the display panel DP may be a liquid crystal display panel, an organic light emitting display panel, a quantum dot light emitting display panel, an electrowetting display panel, etc. However, the exemplary embodiments of the present inventive concept are not limited thereto. For ease of description, the display panel DP will be described herein as an organic light emitting display panel or a quantum dot light emitting display panel.

[0045] The window WD may be disposed on the display panel DP and may cover the front surface of the display panel DP. The window WD may provide an input surface to the user. In an exemplary embodiment, the window WD may have a thickness in a range from about 50 μm to about 300 μm. However, exemplary embodiments of the present invention are not limited thereto. The window WD may have a single-layer or multi-layer structure. In an exemplary embodiment, the window WD may be a plastic film comprising at least one material selected from the group consisting of, for example, polyethersulfone (PES), polyacrylate, polyetherimide (PEI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polyarylate, polyimide (PI), polycarbonate (PC), poly(arylene ether sulfone) and combinations thereof. However, exemplary embodiments of the present invention are not limited thereto. For example, in another exemplary embodiment, the window WD may be provided in the form of a glass or sapphire substrate.

[0046] The window WD may include at least one of a touch screen film and an optical film. In an exemplary embodiment, the optical film may be a polarizing film, a diffusion film, a protective film, etc. However, the exemplary embodiments of the present inventive concept are not limited thereto. In addition, the window WD may further include a functional coating such as an anti-fingerprint coating, an anti-reflective coating, etc.

[0047] The adhesive layer ADH may be disposed between the display panel DP and the window WD. The adhesive layer ADH may be disposed directly between the display panel DP and the window WD (for example, in the third direction DR3). The adhesive layer ADH may include a first polymer layer PL1 and a second polymer layer PL2. The first polymer layer PL1 may have a positive charge or a partial positive charge. For example, the first polymer layer PL1 may be a cationic polymer layer having a positive charge or a partial positive charge throughout the first polymer layer PL1. In an exemplary embodiment, the first polymer layer PL1 may include a cationic polymer obtained by polymerizing at least one selected from a monomer containing a styrene group, a monomer containing a diene group, a monomer containing an acrylate group, a monomer containing an aldehyde group, a monomer containing an epoxy group, a monomer containing an acrylonitrile group, and a monomer containing a cyanoacryloyl group. However, exemplary embodiments of the inventive concept are not limited thereto. For example, in another exemplary embodiment, the first polymer layer PL1 may include at least one of polyethyleneimide and cationic polyacrylamide. The first polymer layer PL1 may be disposed adjacent to the display panel DP or the window WD. The first polymer layer PL1 may be disposed directly on the display panel DP or the window WD. For example, in Figure 3 In the exemplary embodiment shown in , the bottom surface of the first polymer layer PL1 of the adhesion layer ADH may directly contact the top surface of the display panel DP.

[0048] The second polymer layer PL2 may be disposed directly on the first polymer layer PL1 (eg, in the third direction DR3). Figure 3In the exemplary embodiment shown in , the bottom surface of the second polymer layer PL2 can be directly disposed on the top surface of the first polymer layer PL1. The top surface of the second polymer layer PL2 of the adhesion layer ADH can be directly disposed on the bottom surface of the window WD. The second polymer layer PL2 may have a negative charge or a partial negative charge. In other words, the second polymer layer PL2 may be an anionic polymer layer, which has a negative charge or a partial negative charge throughout the second polymer layer PL2. However, the exemplary embodiments of the inventive concept are not limited to these examples. In an exemplary embodiment, the second polymer layer PL2 may include an anionic polymer obtained by polymerizing at least one of a monomer containing an isobutylene group, a monomer containing a styrene group, a monomer containing a diene group, and a monomer containing a vinyl alkyl ether. For example, the second polymer layer PL2 may include at least one of anionic polyacrylamide, polyacrylic acid, and polymethacrylic acid. The first polymer layer PL1 and the second polymer layer PL2 having opposite charges may be attached to each other by electrostatic force.

[0049] Figure 3 An example is shown in which the first polymer layer PL1 and the second polymer layer PL2 are disposed on the top surface of the display panel DP and the bottom surface of the window WD, respectively. However, exemplary embodiments of the inventive concept are not limited thereto. For example, in another exemplary embodiment, the first polymer layer PL1 may be disposed on the bottom surface of the display panel DP, and the second polymer layer PL2 may be disposed on the top surface of the window WD.

[0050] In exemplary embodiments, each of the first polymer layer PL1 and the second polymer layer PL2 may be disposed on an element (eg, the window WD or the display panel DP) by a dip coating method, a slit coating method, or the like.

[0051] refer to Figure 4 In the exemplary embodiment shown in FIG. 1 , the display module DM-a has an adhesive layer ADH-1, and the adhesive layer ADH-1 includes an anion layer AG and a cation layer CG. The anion layer AG may be directly disposed on the first polymer layer PL1 and may be spaced apart from the second polymer layer PL2. The cation layer CG may be directly disposed on the second polymer layer PL2 and may be spaced apart from the first polymer layer PL1. For example, Figure 4As shown in the exemplary embodiment of , the bottom surface of the anion layer AG may be directly disposed on the top surface of the display panel DP. The top surface of the anion layer AG may be directly disposed on the bottom surface PL1-S1 of the first polymer layer PL1. The bottom surface PL2-S2 of the second polymer layer PL2 may be directly disposed on the top surface PL1-S2 of the first polymer layer PL1. The bottom surface of the cationic layer CG may be directly disposed on the top surface PL2-S1 of the second polymer layer PL2. The bottom surface of the window WD may be directly disposed on the top surface of the cationic layer CG.

[0052] although Figure 4 The exemplary embodiment shows an adhesion layer ADH-1 having a stacked structure in which the anion layer AG, the first polymer layer PL1, the second polymer layer PL2, and the cationic layer CG are stacked sequentially (e.g., in the third direction DR3), but in other exemplary embodiments, the cationic layer CG can be directly disposed on the display panel DP, and the anion layer AG can be directly disposed under the window WD.

[0053] The anion layer AG may include a - , O - and O 2 - The cationic layer CG may include at least one anion selected from F + , O + , O 2 + , H + ,Ar + and N 2 + In an exemplary embodiment, the anion layer AG and the cationic layer CG may be formed by a plasma treatment process, etc. For example, OH may be formed by an oxygen plasma treatment, an ultraviolet ozone treatment process, etc. - , O - , O 2 - , O + and O 2 + . F + It can be formed by a perfluoropolyether (PFPE) deposition process or a fluorine plasma treatment process. + ,Ar + or N 2 + The formation may be performed by performing plasma treatment processes on hydrogen, argon, and nitrogen, respectively.

[0054] The anion layer AG having a negative charge and the first polymer layer PL1 having a positive charge or a partial positive charge have charges opposite to each other. Therefore, the anion layer AG and the first polymer layer PL1 can be attached to each other by electrostatic force. In an exemplary embodiment, the adhesion strength between the anion layer AG and the first polymer layer PL1 due to the electrostatic force can be stronger than the adhesion strength between the display panel DP and the first polymer layer PL1. In an exemplary embodiment in which the anion layer AG is directly disposed on the window WD, the adhesion strength between the anion layer AG and the first polymer layer PL1 can be stronger than the adhesion strength between the window WD and the first polymer layer PL1. Therefore, in an embodiment in which the first polymer layer PL1 is disposed on the display panel DP or the window WD and the anion layer AG is inserted therebetween, the first polymer layer PL1 can be more firmly fastened to the display panel DP or the window WD compared to an embodiment in which the first polymer layer PL1 is directly disposed on the display panel DP or the window WD.

[0055] The cationic layer CG having a positive charge and the second polymer layer PL2 having a negative charge or a partial negative charge have charges opposite to each other. Therefore, the cationic layer CG and the second polymer layer PL2 can be attached to each other by electrostatic force. The adhesion strength between the cationic layer CG and the second polymer layer PL2 can be stronger than the adhesion strength between the window WD and the second polymer layer PL2. In an exemplary embodiment in which the cationic layer CG is directly disposed on the display panel DP, the adhesion strength between the cationic layer CG and the second polymer layer PL2 can be stronger than the adhesion strength between the display panel DP and the second polymer layer PL2. Therefore, in an embodiment in which the second polymer layer PL2 is disposed on the display panel DP or the window WD and the cationic layer CG is interposed therebetween, the second polymer layer PL2 can be more firmly fastened to the display panel DP or the window WD compared to an embodiment in which the second polymer layer PL2 is directly disposed on the display panel DP or the window WD.

[0056] refer to Figure 5 and Figure 6 The display modules DM-b and DM-c may further include a support substrate SP. The support substrate SP may be disposed below the display panel DP to support or protect the display panel DP. Figure 5 As shown in the exemplary embodiment of FIG. 1 , the display module DM-b may include a support substrate SP, the top surface of which is directly disposed on the bottom surface of the first polymer layer PL1. However, in another exemplary embodiment, the support substrate SP may be directly disposed on the second polymer layer PL2. Figure 6As shown in the exemplary embodiment of , the display module DM-c may include a supporting substrate SP, the top surface of the supporting substrate SP being directly disposed on the bottom surface of the anion layer AG. However, in other exemplary embodiments, the supporting substrate SP may be directly disposed on the cationic layer CG. In an exemplary embodiment, the supporting substrate SP may be a plastic film comprising at least one compound selected from the group consisting of polyethersulfone (PES), polyacrylate, polyetherimide (PEI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polyarylate, polyimide (PI), polycarbonate (PC), poly(arylene ether sulfone) and combinations thereof. However, exemplary embodiments of the inventive concept are not limited thereto. For example, in another exemplary embodiment, the supporting substrate SP may be provided in the form of a metal film. The supporting substrate SP may include an optical film (e.g., a polarizing film, a diffuser film, a protective film, etc.).

[0057] The adhesive layer ADH or ADH-1 may be disposed in at least one of a region disposed between the display panel DP and the window WD and a region between the support substrate SP and the display panel DP. Figures 5 and 6 As shown in the exemplary embodiment of , the adhesion layers ADH and ADH-1 are disposed in the region between the support substrate SP and the display panel DP and in the region between the window WD and the display panel DP. In an embodiment in which the adhesion layer ADH or ADH-1 is not disposed in one of the region between the display panel DP and the window WD and the region between the support substrate SP and the display panel DP, a pressure-sensitive adhesive may be disposed therebetween. For example, the adhesion layer ADH or ADH-1 disposed between the display panel DP and the window WD or the adhesion layer ADH or ADH-1 disposed between the support substrate SP and the display panel DP may be replaced with a pressure-sensitive adhesive.

[0058] In an exemplary embodiment, except for the position of the adhesive layer ADH or ADH-1 between the support substrate SP and the display panel DP, the adhesive layer ADH or ADH-1 may be configured to have the same Figure 3 and Figure 4 The adhesive layer ADH or ADH-1 disposed between the display panel DP and the window WD is described as having substantially the same features. Therefore, for the sake of brevity, elements and features similar to those previously shown and described will not be repeated.

[0059] Figure 7 , Figure 8 , Fig. 9A , Fig. 10A and Fig. 10B is along Figure 14 and 5 , taken along line II-II′ of FIG. 4 , showing cross-sectional views of display devices DD, DD-a, DD-b, DD-c, and DD-d according to exemplary embodiments of the inventive concept. Fig. 9B According to an exemplary embodiment of the present invention Fig. 9A An enlarged view of part AA.

[0060] For the sake of simplicity, reference has been made to Figures 3 to 6 Elements of the described display module DM, DM-a, DM-b, or DM-c may be identified by the same reference numerals without repeating overlapping descriptions thereof. Figure 7 , Figure 8 , Fig. 10A and Fig. 10B An exemplary embodiment includes having a reference Figure 5 However, in other exemplary embodiments, the display module DM-b includes Figure 7 , Figure 8 , Fig. 10A and Fig. 10B The display module in the display device has Figure 6 The features of the display module DM-c are basically the same as the features. Fig. 9A and Fig. 9B An exemplary embodiment includes having a reference Figure 3 However, in other exemplary embodiments, Fig. 9A and Fig. 9B The display device may include Figure 4 The features of the display module DM-a are substantially the same as the features of the display module DM-a.

[0061] Figure 7 An exemplary embodiment is shown in which one drum RM is disposed in the housing HS.

[0062] When the drum RM rotates, the end portion of the display module DM-b may be attached to or detached from the drum RM. In an exemplary embodiment, a pressure-sensitive adhesive may be provided on the rear surface of the end portion of the support substrate SP, and when the drum RM rotates, the display module DM-b may be attached to or detached from the drum RM.

[0063] refer to Figure 7, the display module DM-b can be pulled out of the housing HS by rotating the drum RM in a clockwise direction. The display module DM-b can be inserted into the housing HS by rotating the drum RM in a counterclockwise direction. However, exemplary embodiments of the inventive concept are not limited thereto. For example, in another exemplary embodiment, the structure of the drum RM and the display module DM-b can be configured such that the rotation of the drum RM in a clockwise direction causes the display module DM-b to be inserted into the housing HS, and the rotation of the drum RM in a counterclockwise direction causes the display module DM-b to be pulled out of the housing HS.

[0064] In an exemplary embodiment in which the support substrate SP is omitted, a pressure-sensitive adhesive may be provided on a bottom surface (eg, rear surface) of the display panel DP, and thus, the display module DM-b may be attached to or detached from the drum RM.

[0065] In the conventional structure, a pressure-sensitive adhesive is provided in two regions between the display panel DP and the window WD and between the support substrate SP and the display panel DP to adhere the elements of the display module. However, the display panel DP, the window WD, and the support substrate SP may be wound on a roller with different curvatures. Therefore, when the display module is wound or unwound, stress may be applied to the display module. Therefore, due to the stress applied to the display module, the pressure-sensitive adhesive may be separated from the display panel DP, the window WD, and the support substrate SP. In addition, due to the stress applied to the display module when the display module is wound or unwound, the display panel DP, the window WD, and the support substrate SP may be easily broken.

[0066] According to an exemplary embodiment of the inventive concept, the display device DD may include an adhesive layer ADH disposed in at least one of a region between the display panel DP and the window WD and a region between the support substrate SP and the display panel DP.

[0067] In the adhesion layer ADH, the first polymer layer PL1 having a positive charge and the second polymer layer PL2 having a negative charge can be attached to each other by an electrostatic force. Therefore, in a case where the display module DM-b is wound or unwound and a stress is applied, the first polymer layer PL1 and the second polymer layer PL2 attached to each other by an electrostatic force can be accurately moved by sliding relative to each other without being separated between the first polymer layer PL1 and the second polymer layer PL2. In this exemplary embodiment in which the first polymer layer PL1 and the second polymer layer PL2 are configured to be accurately moved by sliding relative to each other, the stress applied to the display module DM-b can be absorbed. Therefore, the adhesion layer ADH can be prevented from being separated from the display panel DP, the window WD, and the supporting substrate SP, or the display panel DP, the window WD, and the supporting substrate SP can be prevented from being broken to improve the operational reliability of the display device DD.

[0068] refer to Figure 8 , the display device DD-a according to the exemplary embodiment of the inventive concept may further include at least one auxiliary roller RM-S. The auxiliary roller RM-S may be spaced apart from the roller RM to guide the display module DM-b. For example, Figure 8 As shown in the exemplary embodiment of , the auxiliary roller RM-S may be spaced apart from the roller RM in the first direction DR1 to support the display module DM-b. For example, the display module DM-b may not be wound around the auxiliary roller RM-S. However, the auxiliary roller RM-S may press or support the display module DM-b before the winding step. Therefore, the auxiliary roller RM-S may help prevent the first polymer layer PL1 and the second polymer layer PL2 from being separated or separated from each other. In addition, the auxiliary roller RM-S may prevent the adhesive layer ADH from being separated from the window WD, the display panel DP, and the supporting substrate SP.

[0069] exist Figure 8 In the exemplary embodiment shown in , the display device DD-a includes only a single auxiliary roller RM-S. However, in other exemplary embodiments of the present inventive concept, the display device may include two or more auxiliary rollers RM-S to press or support the display module.

[0070] like Fig. 9A As shown in the exemplary embodiment of FIG. 1 , the display device DD-b may include a first roller RM1 and a second roller RM2. The window WD may be adhered or attached to the first roller RM1. For example, Fig. 9A As shown in the exemplary embodiment of , the first surface of the second polymer layer PL2 may be attached or adhered to the first roller RM1, and the second surface of the second polymer layer PL2 opposite to the first surface may be attached to the end of the window WD. The end of the display panel DP may be adhered or attached to the second roller RM2. For example, as Fig. 9A As shown in the exemplary embodiment of FIG. 1 , the first surface of the display panel DP may be attached or adhered to the second roller RM2, and the second surface of the display panel DP opposite to the first surface may be attached to the first surface of the first polymer layer PL1. The second surface of the first polymer layer PL1 opposite to the first surface may directly contact the first surface of the second polymer layer PL2. The first roller RM1 may wrap the window WD, and the second roller RM2 may wrap the display panel DP. Fig. 9A Display device DD-b with reference Figure 7 The other components corresponding to the display device DD described above can be configured to have Figure 7 Such elements in the have substantially the same features.

[0071] The first roller RM1 and the second roller RM2 may be spaced apart from each other. Fig. 9AAs shown in the exemplary embodiment of , the first roller RM1 may be spaced apart from the second roller RM2 in the first direction DR1. The second roller RM2 may also be higher than the first roller RM1. For example, the distance L1 between the first roller RM1 and the lower frame DF (e.g., in the third direction DR3) may be smaller than the distance L2 between the second roller RM2 and the lower frame DF (e.g., in the third direction DR3). In this exemplary embodiment, the distance between the roller and the lower frame may refer to the shortest distance between the roller and the lower frame.

[0072] The second roller RM2 may overlap at least a portion of the upper frame UF (e.g., in the third direction DR3). In an exemplary embodiment, the first roller RM1 may overlap at least a portion of the opening OP or the upper frame UF (e.g., in the third direction DR3). In an exemplary embodiment in which the second roller RM2 around which the display panel DP is wound overlaps at least a portion of the upper frame UF and the first roller RM1 is spaced apart from the second roller RM2 in the first direction DR1, an image may be displayed through the opening OP defined in the shell HS even when the shell HS is elongated in the first direction DR1. Therefore, the display device may provide a relatively large display surface for a given space, and the space may be effectively utilized.

[0073] When the first roller RM1 and the second roller RM2 rotate, the window WD and the display panel DP may be attached to or separated from each other. For example, in an exemplary embodiment when the first roller RM1 and the second roller RM2 rotate in a clockwise direction, the display module DM may be extracted from the inner space of the housing HS (for example, it may extend outward from the housing HS in the first direction DR1). When the display module DM is extracted, the first polymer layer PL1 and the second polymer layer PL2 may adhere to each other, and therefore, the display panel DP and the window WD may be coupled to each other to form a single object. In an exemplary embodiment when the first roller RM1 and the second roller RM2 rotate in a counterclockwise direction, the display module DM may be inserted into the inner space of the housing HS, and the first polymer layer PL1 and the second polymer layer PL2 may be separated from each other. Therefore, the display panel DP and the window WD may be spaced apart from each other. However, exemplary embodiments of the inventive concept are not limited thereto, and the rollers RM1 and RM2 and the display module DM may be arranged so that the rotation direction of the rollers RM1 and RM2 for inserting or extracting the display module DM may be modified differently.

[0074] Fig. 9B yes Fig. 9A An enlarged cross-sectional view of section 'AA' of FIG. Fig. 9B, when the first roller RM1 and the second roller RM2 rotate in the clockwise direction, the first polymer layer PL1 and the second polymer layer PL2 may contact each other, and in this case, since the first polymer layer PL1 and the second polymer layer PL2 have opposite charges, they may be attached to each other by electrostatic force. On the contrary, when the first roller RM1 and the second roller RM2 rotate in the counterclockwise direction, a force stronger than the electrostatic force may be applied between the first polymer layer PL1 and the second polymer layer PL2, and therefore, the first polymer layer PL1 and the second polymer layer PL2 may be separated from each other.

[0075] In an exemplary embodiment in which both the window WD and the display panel DP are wound on the same drum RM, the radius of curvature of the window WD adjacent to the outer surface exposed as the top surface may be greater than the radius of curvature of the display panel DP adjacent to the inner surface wound as the inner surface. Therefore, the radius of curvature of the window WD may be greater than the radius of curvature of the display panel DP. In an embodiment in which two components (such as the window WD and the display panel DP) are wound on the same drum RM with two different radii of curvature, the display module DM-b may be easily broken due to the stress applied to the display module DM-b. In contrast, according to an exemplary embodiment of the inventive concept, the window WD and the display panel DP of the display module DM-b may be wound on two different drums RM1 and RM2, which results in reduced stress compared to an embodiment in which the window WD and the display panel DP are wound on one drum RM. Therefore, the display module DM may be prevented from breaking, and the operational reliability of the display device DD-b may be improved.

[0076] In an exemplary embodiment, the first polymer layer PL1 and the second polymer layer PL2 of the adhesion layer ADH may not exhibit adhesion properties to uncharged particles. Therefore, even if the first polymer layer PL1 and the second polymer layer PL2 of the adhesion layer ADH are exposed to contamination materials (e.g., dust), in the insertion and extraction steps, the inflow of the contamination materials can be suppressed compared to conventional pressure-sensitive adhesives. In addition, when the display module DM is wound or unwound, the stress applied to the display module can be absorbed by the sliding of the first polymer layer PL1 and the second polymer layer PL2. Therefore, the operational reliability of the display device DD is improved.

[0077] The display module DM according to the exemplary embodiment of the inventive concept may further include a support substrate SP (eg, see Figure 5 In an exemplary embodiment, the support substrate SP may be attached or adhered to the adhesive layer ADH disposed on the rear surface of the display panel DP, and may be wound by the second roller RM2.

[0078] like Fig. 10A and Fig. 10BAs shown in the exemplary embodiment of , the display device DD-c or DD-d may include a first roller RM1, a second roller RM2, and a third roller RM3. Fig. 10A and Fig. 10B The display device DD-c or DD-d shown, with reference to Figure 7 , Fig. 9A or Fig. 9B The components corresponding to the display device DD or DD-b described above can be configured to have Figure 7 , Fig. 9A or Fig. 9B Such elements in the have substantially the same features.

[0079] refer to Fig. 10A , the end portion of the window WD can be attached or adhered to the first roller RM1. Fig. 10A As shown in the exemplary embodiment, a first surface of the second polymer layer PL2 of the adhesive layer ADH disposed between the window WD and the display panel DP may be attached or adhered to the first roller RM1, and a second surface of the second polymer layer PL2 opposite to the first surface may be attached to an end portion of the window WD.

[0080] The end portion of the display panel DP may be attached or adhered to the second roller RM2. Fig. 10A As shown in the exemplary embodiment of , the first surface of the second polymer layer PL2 of the adhesion layer ADH disposed between the display panel DP and the support substrate SP may be attached or adhered to the second roller RM2, and the second surface of the second polymer layer PL2 opposite to the first surface may be attached to the end of the rear surface of the display panel DP. The front surface of the display panel DP may be attached or adhered to the first surface of the first polymer layer PL1 of the adhesion layer ADH disposed between the window WD and the display panel DP. The second surface of the first polymer layer PL1 of the adhesion layer ADH disposed between the window WD and the display panel DP may directly contact the first surface of the second polymer layer PL2 of the adhesion layer ADH.

[0081] The end portion of the supporting substrate SP may be attached or adhered to the third roller RM3. Fig. 10A As shown in the exemplary embodiment shown in , the end of the rear surface of the support substrate SP may be attached or adhered to the third roller RM3. The front surface of the support substrate SP may be attached or adhered to the first surface of the first polymer layer PL1 of the adhesive layer ADH between the display panel DP and the support substrate SP. The second surface of the first polymer layer PL1 may directly contact the first surface of the second polymer layer PL2 of the adhesive layer ADH.

[0082] The first roller RM1 may wrap around an end portion of the window WD, the second roller RM2 may wrap around an end portion of the display panel DP, and the third roller RM3 may wrap around an end portion of the support substrate SP.

[0083] like Fig. 10A As shown in the exemplary embodiment of , the first roller RM1, the second roller RM2 and the third roller RM3 may be spaced apart from each other (e.g., in the first direction DR1). In an exemplary embodiment, the first roller RM1 may be disposed between the second roller RM2 and the third roller RM3. The distance between the first roller RM1 and the second roller RM2 (i.e., "L-1") may be greater than the distance between the first roller RM1 and the third roller RM3. In this specification, the distance between the rollers may mean the shortest distance between the rollers.

[0084] The distance L-1 between the first roller RM1 and the second roller RM2 may be less than the distance L-2 between the second roller RM2 and the third roller RM3. The first roller RM1 and the third roller RM3 may overlap with the opening OP (for example, in the third direction DR3), and at least a portion of the second roller RM2 may overlap with the upper frame UF (for example, in the third direction DR3). In this exemplary embodiment, even if the housing HS is elongated in the first direction DR1, an image may be displayed through the opening OP defined in the housing HS. Therefore, the display device may provide a relatively large display surface for a given space, and the space may be effectively utilized.

[0085] However, the exemplary embodiments of the present invention are not limited thereto. Fig. 10B As shown in, the first roller RM1, the second roller RM2 and the third roller RM3 may be spaced apart from the lower frame DF in the thickness direction of the display module DM-b (e.g., in the third direction DR3), and each of the first roller RM1 to the third roller RM3 may overlap at least a portion of the upper frame UF (e.g., in the third direction DR3). In an exemplary embodiment, the distance L1 between the first roller RM1 and the lower frame DF (e.g., in the third direction DR3) may be smaller than the distance L2 between the second roller RM2 and the lower frame DF (e.g., in the third direction DR3). The distance L2 between the second roller RM2 and the lower frame DF (e.g., in the third direction DR3) may be smaller than the distance L3 between the third roller RM3 and the lower frame DF (e.g., in the third direction DR3).

[0086] In addition to the window WD and the display panel DP, the display panel DP and the support substrate SP can be attached or separated from each other by the rotation of the first roller RM1, the second roller RM2 and the third roller RM3. For example, in an exemplary embodiment when the first roller RM1, the second roller RM2 and the third roller RM3 rotate in a clockwise direction, the display module DM-b can be drawn out from the inner space of the housing HS. When the display module DM-b is drawn out from the inner space of the housing HS, the first polymer layer PL1 and the second polymer layer PL2 can adhere to each other, and therefore, the display panel DP, the window WD and the support substrate SP can be connected to each other to form a single object. In an exemplary embodiment when the first roller RM1, the second roller RM2 and the third roller RM3 rotate in a counterclockwise direction, the display module DM-b can be inserted into the inner space of the housing HS. When the display module DM-b is inserted into the inner space of the housing HS, the first polymer layer PL1 and the second polymer layer PL2 can be separated from each other, and therefore, the display panel DP, the window WD and the support substrate SP can be spaced apart from each other. However, the exemplary embodiment of the present inventive concept is not limited thereto, and the arrangement of the window WD, the display panel DP, the support substrate SP, the first roller RM1, the second roller RM2, and the third roller RM3 can be changed so that when the window WD, the display panel DP, and the support substrate SP are inserted or extracted, the rotation direction of the first roller RM1, the second roller RM2, and the third roller RM3 can be changed. According to the exemplary embodiment of the present inventive concept, since the window WD, the display panel DP, and the support substrate SP are respectively wound on the rollers RM1, RM2, and RM3, the stress can be reduced compared with the embodiment in which the window WD and the display panel DP are wound on a single roller RM. Therefore, the display device DD-c or DD-d can prevent the display module DM-b from breaking and improve the operational reliability of the display device DD-c or DD-d. In addition, the inflow of the contaminated material in the insertion step and the extraction step of the display module DM-b can be reduced, and the stress that may occur when the display module DM-b is wound or unwound can be absorbed to improve the operational reliability of the display device DD-c or DD-d.

[0087] In an exemplary embodiment, each of the first roller RM1, the second roller RM2 and the third roller RM3 may be connected to a driving member. In certain exemplary embodiments, one or two rollers selected from the first roller RM1, the second roller RM2 and the third roller RM3 may be connected to a driving member.

[0088] There may be differences in the rotation speed between the first roller RM1, the second roller RM2 and the third roller RM3. In the exemplary embodiment in which the first roller RM1, the second roller RM2 and the third roller RM3 are connected to respective drive components, it is necessary to accurately control the drive component according to the insertion speed and the extraction speed of the display module DM-b. For example, if there is an error in the rotation speed of the first roller RM1, the second roller RM2 and the third roller RM3, the components attached to the first roller RM1, the second roller RM2 and the third roller RM3 may move by mistake and may damage the display module DM-b. However, in the exemplary embodiment in which only one or two rollers in the first roller RM1, the second roller RM2 and the third roller RM3 are connected to the drive component, it is sufficient to control only one or two drive components, and this may allow simplified design. For example, in the exemplary embodiment in which only the second roller RM2 is connected to the drive component, the first roller RM1 and the third roller RM3 attached to each component of the display module DM-b can be rotated by the rotation of the second roller RM2 receiving the drive signal from the drive component. Therefore, the display module DM-b may prevent damage due to the difference in rotation speeds among the first drum RM1, the second drum RM2, and the third drum RM3.

[0089] Fig.11 is a top plan view illustrating a portion of a display device DD-c according to an exemplary embodiment of the inventive concept. Fig. 12A is along Fig.11 A cross-sectional view showing a portion of the display device DD-c, taken along line III-III'. Fig. 12B is a cross-sectional view illustrating a portion of a display panel DP according to an exemplary embodiment of the inventive concept.

[0090] refer to Fig.11 , the display panel DP may include a display area DA, a non-display area BA, and a mounting area MA, wherein the display area DA is used to display an image, the non-display area BA is disposed adjacent to the display area DA (e.g., along the periphery of the display area DA), no image is displayed in the non-display area BA, and the connection substrate PCB is coupled to the mounting area MA. In an exemplary embodiment, the non-display area BA and the mounting area MA may not be disposed as distinct areas. For example, the non-display area BA may be omitted, or the mounting area MA may form a part of the non-display area BA.

[0091] like Fig. 12A and Fig. 12B As shown in , the display panel DP may include a display substrate DS, a light emitting element layer DL disposed on the display substrate DS (eg, in a third direction DR3 ), and an encapsulation layer TFE disposed on the light emitting element layer DL.

[0092] like Fig. 12B As shown in , the display substrate DS may include a base layer BL, organic / inorganic layers BR, BF, ENC1, ENC2, and ENC3, a switching transistor, and a driving transistor TFT-D. The semiconductor pattern ALD of the driving transistor TFT-D may be disposed on the base layer BL. In an exemplary embodiment, the semiconductor pattern ALD may be formed of or include at least one of amorphous silicon, polycrystalline silicon, and a metal oxide semiconductor material.

[0093] The organic / inorganic layers BR, BF, ENC1, ENC2, and ENC3 may include functional layers BR and BF, a first insulating layer ENC1, a second insulating layer ENC2, and a third insulating layer ENC3.

[0094] The functional layers BR and BF may be disposed on the surface of the base layer BL. The functional layers BR and BF may include at least one of a barrier layer BR and a buffer layer BF. The semiconductor pattern ALD may be disposed on the barrier layer BR or the buffer layer BF.

[0095] The first insulating layer ENC1 may be disposed on the base layer BL to cover the semiconductor pattern ALD. The first insulating layer ENC1 may include an organic layer and / or an inorganic layer. In an exemplary embodiment, the first insulating layer ENC1 may include a plurality of inorganic thin films. The plurality of inorganic thin films may include a silicon nitride layer and a silicon oxide layer. However, exemplary embodiments of the inventive concept are not limited thereto.

[0096] The control electrode GED of the driving transistor TFT-D may be disposed on the first insulating layer ENC1. The control electrode of the switching transistor may also be disposed on the first insulating layer ENC1. The second insulating layer ENC2 may be disposed on the first insulating layer ENC1 to cover the control electrode GED. The second insulating layer ENC2 may include an organic layer and / or an inorganic layer. For example, in an exemplary embodiment, the second insulating layer ENC2 may include a plurality of inorganic thin films. The plurality of inorganic thin films may include a silicon nitride layer and a silicon oxide layer. However, exemplary embodiments of the inventive concept are not limited thereto.

[0097] The input electrode SED and the output electrode DED of the driving transistor TFT-D may be disposed on the second insulating layer ENC2. In an exemplary embodiment, the input electrode and the output electrode of the switching transistor may also be disposed on the second insulating layer ENC2.

[0098] The input electrode SED and the output electrode DED may be connected to two different portions of the semiconductor pattern ALD through first and second through holes CH1 and CH2 formed to penetrate the first and second insulating layers ENC1 and ENC2, respectively. The first and second through holes CH1 and CH2 may be spaced apart (eg, in the first direction DR1).

[0099] The third insulating layer ENC3 may be disposed on the second insulating layer ENC2 to cover the input electrode SED and the output electrode DED. The third insulating layer ENC3 may include an organic layer and / or an inorganic layer. For example, in an exemplary embodiment, the third insulating layer ENC3 may include an organic material and may be formed to have a flat top surface.

[0100] However, exemplary embodiments of the inventive concept are not limited thereto, and in exemplary embodiments, at least one of the first insulating layer ENC1, the second insulating layer ENC2, and the third insulating layer ENC3 may be omitted according to the circuit structure of the pixel. Each of the second insulating layer ENC2 and the third insulating layer ENC3 may be defined as an interlayer insulating layer. The interlayer insulating layer may be used to electrically separate conductive patterns, which are disposed above and below the interlayer insulating layer or are spaced apart from each other with the interlayer insulating layer interposed therebetween.

[0101] The light emitting element layer DL may be disposed on the third insulating layer ENC3. The light emitting element layer DL may include a pixel defining layer PDL and a light emitting element EL. An anode AE ​​may be disposed on the third insulating layer ENC3. The anode AE ​​may be connected to the output electrode DED of the driving transistor TFT-D through a third penetration hole CH3 formed to penetrate the third insulating layer ENC3. An opening OP-1 may be defined in the pixel defining layer PDL. The opening OP-1 of the pixel defining layer PDL may expose a portion of the anode AE.

[0102] The light emitting element layer DL may include a light emitting region PXA and a non-light emitting region NPXA adjacent to the light emitting region PXA. The non-light emitting region NPXA may surround the light emitting region PXA. Fig. 12B In the exemplary embodiment shown in , the light emitting region PXA is defined to correspond to the anode AE. However, the shape or position of the light emitting region PXA is not limited thereto, and the light emitting region PXA may have various shapes as long as the light emitting region PXA defines a region from which light is emitted. In an exemplary embodiment, the light emitting region PXA may be defined to correspond to the above-mentioned portion of the anode AE ​​exposed by the opening OP-1.

[0103] The hole control layer HCL may be disposed in both the emission region PXA and the non-emission region NPXA. For example, the hole control layer HCL may extend from the emission region PXA to the non-emission region NPXA in the first direction DR1. Although not shown, a common layer such as the hole control layer HCL may be commonly formed in a plurality of pixels.

[0104] The light emitting layer EML may be disposed on the hole control layer HCL. The light emitting layer EML may be disposed only in a region corresponding to the opening OP-1. For example, the light emitting layer EML may be divided into a plurality of separate patterns respectively formed in a plurality of pixels.

[0105] In an exemplary embodiment, the light emitting layer EML may include an organic material or an inorganic material as a light emitting material. For example, the light emitting layer EML may include at least one of an organic compound and an organic metal compound as a light emitting material. Alternatively, the light emitting layer EML may include quantum dots as a light emitting material.

[0106] An electron control layer ECL may be disposed on the light emitting layer EML. A cathode CE may be disposed on the electron control layer ECL. The cathode CE may be commonly disposed in a plurality of pixels.

[0107] exist Fig. 12B In the exemplary embodiment shown in , the light emitting layer EML is shown to have a patterned structure. However, in another exemplary embodiment of the present inventive concept, the light emitting layer EML may be provided in common in a plurality of pixels. In an exemplary embodiment, the light emitting layer EML may be configured to emit white light or blue light. In an exemplary embodiment, the light emitting layer EML may have a multilayer structure. However, exemplary embodiments of the present inventive concept are not limited thereto.

[0108] In this exemplary embodiment, the encapsulation layer TFE may directly cover the cathode CE. In an exemplary embodiment, a cover layer may also be provided to cover the cathode CE. In this embodiment, the encapsulation layer TFE may directly cover the cover layer. The encapsulation layer TFE may include an organic layer including an organic material and an inorganic layer including an inorganic material. In an exemplary embodiment, the encapsulation layer TFE may cover the side surface of the light emitting element layer DL. In an exemplary embodiment, the base layer BL of the display panel DP may be omitted.

[0109] The connection substrate PCB may be provided in the form of a flexible film. The connection substrate PCB may be, for example, a flexible printed circuit board (FPCB). However, exemplary embodiments of the inventive concept are not limited thereto.

[0110] The connection substrate PCB may electrically connect the display panel DP with the drive substrate DRP. One end portion of the connection substrate PCB may be electrically connected to the display panel DP through an adhesive conductive film ACF, and the other end portion of the connection substrate PCB may be electrically connected to the drive substrate DRP through an adhesive conductive film ACF. In an exemplary embodiment, the adhesive conductive film ACF may be an anisotropic conductive film. However, exemplary embodiments of the inventive concept are not limited thereto.

[0111] The drive substrate DRP may provide image data, control signals, power supply voltage, etc. to the display panel DP. The drive substrate DRP may be a flexible interconnect substrate or a rigid interconnect substrate. In an exemplary embodiment, the drive substrate DRP may be a drive circuit. In some exemplary embodiments, the drive substrate DRP may be a substrate on which a drive circuit is mounted.

[0112] like Fig. 12A As shown in the exemplary embodiment of , the display panel DP may be wound around the second drum RM2, and the drive substrate DRP may be located in the second drum RM2. The second drum RM2 may define an internal space in which at least a portion of the connection substrate PCB and the drive substrate DRP are stored. In an exemplary embodiment, a coupling opening RHM coupled to the connection substrate PCB may be defined in a portion of the second drum RM2. The connection substrate PCB may be received through the coupling opening RHM and may extend to the drive substrate DRP (e.g., in the first direction DR1).

[0113] Since the driving substrate DRP is located in the second roll RM2, an additional member for covering the driving substrate DRP and an additional member for fastening the display module DM and the second roll RM2 may be omitted.

[0114] Fig.13 is along Figure 1 A cross-sectional view showing a portion of the display device DD-e taken along line II-II'. Fig.13, the display device DD-e may further include an ion generating component IZ. The ion generating component IZ may emit positive ions and / or negative ions. Although not shown in the drawings, the ion generating component IZ may include a discharge component for generating ions. In an exemplary embodiment in which a high voltage current is applied to the discharge component, positive ions and / or negative ions may be generated. When the display module DM-b is inserted into the housing HS, the positive ions and / or negative ions generated by the discharge component may be provided to the display module DM-b. For example, the positive ions and / or negative ions may be provided to the display module DM-b by an airflow containing ions generated by the ion generating component IZ. The positive ions and / or negative ions provided to the display module DM-b may reduce the electrostatic force between the first polymer layer PL1 and the second polymer layer PL2, and therefore, the first polymer layer PL1 and the second polymer layer PL2 may be easily separated from each other.

[0115] The ion generating component IZ may be disposed on the housing HS. Fig.13 As shown in the exemplary embodiment of , the ion generating part IZ may be disposed on the surface of the side frame SF. In the exemplary embodiment, the ion generating part IZ may be disposed inside or outside the housing HS. However, the exemplary embodiments of the present inventive concept are not limited thereto, and the position of the ion generating part IZ may be variously modified as long as the ion generating part IZ is disposed to easily provide positive ions and / or negative ions to the integrated display module.

[0116] In an exemplary embodiment, the adhesion layer ADH may include a first polymer layer PL1 having positive charges and a second polymer layer PL2 disposed on the first polymer layer PL1 and having negative charges. Therefore, fractures of the display panel DP, the window WD, and the support substrate SP may be reduced, and operational reliability of the display device DD may be improved.

[0117] According to an exemplary embodiment of the inventive concept, a display device may include a polymer layer disposed between components of a display module and having opposite charges. Therefore, stress applied to each component or element of the display module during a rolling operation may be reduced, and this may make it possible to improve the operational reliability of the rollable display device.

[0118] While exemplary embodiments of the present inventive concepts have been particularly shown and described, it will be understood by those skilled in the art that changes in form and details may be made in the exemplary embodiments of the present inventive concepts without departing from the spirit and scope of the appended claims.

Claims

1. Display equipment, including: Display module; case; at least one drum disposed in the housing, wherein the display module is configured to be able to be wound around the at least one drum and to be able to be inserted into and withdrawn from the housing; Wherein, the display module comprises: Display panel; a window located on the display panel; and An adhesive layer, located between the display panel and the window, the adhesive layer comprising: a first polymer layer having a positive charge; and a second polymer layer having a negative charge, the second polymer layer being disposed directly on the first polymer layer, Wherein, when the display module is wound on the at least one roller and inserted into the housing or withdrawn from the housing and a stress is applied thereto, the first polymer layer and the second polymer layer move by sliding relative to each other.

2. The display device according to claim 1, wherein: The adhesive layer is disposed directly between the display panel and the window.

3. The display device according to claim 1, wherein: The first polymer layer includes a cationic polymer obtained by polymerizing at least one selected from a monomer containing a styrene group, a monomer containing a diene group, a monomer containing an acrylate group, a monomer containing an aldehyde group, a monomer containing an epoxy group, a monomer containing an acrylonitrile group, and a monomer containing a cyanoacryloyl group; and The second polymer layer includes an anionic polymer obtained by polymerizing at least one selected from a monomer including an isobutylene group, a monomer including a styrene group, a monomer including a diene group, and a monomer including a vinyl alkyl ether.

4. The display device according to claim 1, wherein: The adhesive layer further comprises: an anion layer disposed directly on a first surface of the first polymer layer, the first surface of the first polymer layer being opposite to a second surface of the first polymer layer, the second surface of the first polymer layer being disposed directly on a second surface of the second polymer layer; and The cationic layer is directly disposed on the first surface of the second polymer layer, and the first surface of the second polymer layer is opposite to the second surface of the second polymer layer.

5. The display device according to claim 4, wherein: The anion layer includes OH - , O - and O2 - At least one of The cationic layer includes F + , O + 、O2 + , H + ,Ar + and N2 + At least one of .

6. The display device according to claim 1, wherein: The at least one roller comprises only a first roller; and Both the display panel and the window are configured to be able to be wound around the first roller.

7. The display device according to claim 1, wherein: The housing comprises: Lower frame; an upper frame, opposite to the lower frame, the upper frame defining an opening into and out of which the display module can be inserted; and The side frame is arranged between the lower frame and the upper frame.

8. The display device according to claim 7, further comprising: a supporting substrate configured to support the display module; as well as The at least one roller comprises a first roller, a second roller and a third roller. Wherein, the adhesive layer is also arranged between the display module and the supporting substrate, wherein the window is configured to be able to be wound around the first roller; wherein the display panel is configured to be able to be wound around the second roller; and Wherein, the supporting substrate is configured to be able to be wound on the third roller.

9. The display device according to claim 8, wherein: The adhesive layer is disposed directly between the display panel and the window and between the support substrate and the display panel, wherein: When the display module is inserted into the housing, the first polymer layer and the second polymer layer are configured to be separated from each other, and the display panel, the window, and the support substrate are configured to be spaced apart from each other, and When the display module is withdrawn from the housing, the first polymer layer and the second polymer layer are configured to adhere to each other, and the display panel, the window, and the support substrate are configured to be combined with each other to form a single object.

10. The display device according to claim 8, wherein: The first roller, the second roller, and the third roller are spaced apart from each other in a thickness direction of the display module and overlap at least a portion of the upper frame in the thickness direction of the display module, A first distance between the first roller and the lower frame is smaller than a second distance between the second roller and the lower frame, and The second distance is smaller than a third distance between the third drum and the lower frame.

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