Display device

Abstract

A display device includes a display panel including a first surface displaying an image and a second surface opposite the first surface, the display panel being folded to have a curvature, and a sliding member disposed on the second surface of the display panel and configured to slide a portion of the display panel such that the curvature of the display panel is changed.

Description

[0001] Cross-references to related applications

[0002] This application claims priority and benefit to Korean Patent Application No. 10-2021-0024587, filed on February 24, 2021, which is incorporated herein by reference for all purposes as if fully set forth herein. Technical Field

[0003] The embodiments of the present invention generally relate to a display device. Background Technology

[0004] With the evolution of multimedia technology, display devices have become increasingly important. Therefore, various types of display devices, such as liquid crystal displays (LCDs) and organic light-emitting diode (OLEDs), are currently in use.

[0005] Mobile electronic devices include display devices used to provide images to users. Recently, flexible display devices, foldable display devices, rollable display devices, and sliding display devices, employing flexible display panels that can be bent, folded, or rolled, have been developed. When designing such display devices, it is important to reduce the stress applied to the flexible display panel.

[0006] The information disclosed in this background section is only for understanding the background technology of the present invention concept, and therefore may contain information that does not constitute prior art. Summary of the Invention

[0007] The device constructed according to an embodiment of the present invention can change the curvature of the foldable display panel of the display device to reduce the amount of stress that may be applied to the display device.

[0008] This disclosure provides a display device capable of reducing the stress applied to a display panel.

[0009] Additional features of the inventive concept will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practice of the inventive concept.

[0010] According to an embodiment, a display device is provided, comprising: a display panel including a first surface for displaying an image and a second surface opposite to the first surface, the display panel being folded to have a curvature; and a sliding member disposed on the second surface of the display panel and configured to slide part of the display panel such that the curvature of the display panel changes.

[0011] According to another embodiment, a display device is provided, the display device comprising: a display panel including a first surface for displaying an image and a second surface opposite to the first surface, wherein the display device is capable of transitioning between a first state, a second state, and a third state, wherein in the first state the display panel is unfolded flat, in the second state the display device is folded such that the first surface of the display panel is not exposed to the outside, and in the third state a portion of the display panel slides from the second state relative to another portion of the display panel such that only a portion of the first surface of the display panel is exposed, and wherein the display panel has a first curvature in the second state and a second curvature smaller than the first curvature in the third state.

[0012] According to an embodiment, the stress applied to the display panel of the display device can be reduced.

[0013] It will be understood that both the foregoing general description and the following detailed description are illustrative and explanatory, and are intended to provide further explanation of the claimed invention. Attached Figure Description

[0014] The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the inventive concept.

[0015] Figure 1 This is a perspective view of the display device in a first state according to an embodiment.

[0016] Figure 2 This is a perspective view of the display device in a second state according to an embodiment.

[0017] Figure 3 This is a perspective view of the display device in a third state according to an embodiment.

[0018] Figure 4 It is along Figure 1 The sectional view of the display module is taken by line A-A'.

[0019] Figure 5 yes Figure 4 A cross-sectional view of the display panel.

[0020] Figure 6 It is along Figure 1 A cross-sectional view of the display device taken by line B-B'.

[0021] Figure 7 It is along Figure 2 A cross-sectional view of the display device taken by line C-C'.

[0022] Figure 8 It is along Figure 3The cross-sectional view of the display device is taken by line D-D'.

[0023] Figure 9 yes Figure 7 A magnified perspective view of part P1.

[0024] Figure 10 yes Figure 8 A magnified perspective view of part P2.

[0025] Figure 11 This is a cross-sectional view of a display device in a first state according to another embodiment.

[0026] Figure 12 This is a cross-sectional view of a display device in a second state according to another embodiment.

[0027] Figure 13 This is a cross-sectional view of a display device in a third state according to another embodiment.

[0028] Figure 14 This is a cross-sectional view of a display device according to another embodiment during the transition from a third state to a second state. Detailed Implementation

[0029] In the following description, numerous specific details are set forth for illustrative purposes to provide a thorough understanding of various embodiments or implementations of the invention. As used herein, “embodiment” and “implementation” are interchangeable terms as non-limiting examples of apparatuses or methods employing one or more of the inventive concepts disclosed herein. However, it is clear that various embodiments may be practiced without these specific details or in one or more equivalent arrangements. In other instances, well-known structures and apparatuses are shown in block diagram form to avoid unnecessarily obscuring the various embodiments. Furthermore, the various embodiments may be different, but are not necessarily exclusive. For example, specific shapes, constructions, and characteristics of an embodiment may be used or implemented in another embodiment without departing from the inventive concept.

[0030] Unless otherwise stated, the illustrated embodiments are to be understood as providing features of varying details that can be used to implement the inventive concept in practice. Therefore, unless otherwise stated, features, components, modules, layers, films, panels, regions and / or aspects (hereinafter individually or collectively referred to as “elements”) of various embodiments may be combined, separated, interchanged and / or rearranged without departing from the inventive concept.

[0031] Cross-hatching and / or shading lines are typically used in accompanying drawings to clearly define the boundaries between adjacent elements. Thus, unless otherwise stated, the presence or absence of cross-hatching or shading lines does not convey or indicate any preference or requirement for the specific material, material properties, dimensions, scale, commonalities between elements, or any other characteristics, properties, etc. Furthermore, in the drawings, the dimensions and relative dimensions of elements may be exaggerated for clarity and / or descriptive purposes. When embodiments can be implemented differently, a particular process sequence may be performed in a different order than described. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of description. Moreover, the same reference numerals denote the same elements.

[0032] When an element or layer is referred to as being "on," "connected to," or "bonded to" another element or layer, it may be directly on, directly connected to, or directly bonded to the other element or layer, or an intermediary element or layer may be present. However, when an element or layer is referred to as being "directly on," "directly connected to," or "directly bonded to" another element or layer, an intermediary element or layer is not present. Therefore, the term "connection" can refer to a physical connection, electrical connection, and / or fluid connection, with or without an intermediary element. Furthermore, the first direction X, the second direction Y, and the third direction Z are not limited to the three axes of a Cartesian coordinate system such as the x-axis, y-axis, and z-axis, and can be interpreted in a broader sense. For example, the first direction X, the second direction Y, and the third direction Z can be perpendicular to each other, or can represent different directions that are not perpendicular to each other. For the purposes of this disclosure, "at least one of X, Y, and Z" and "at least one selected from the group consisting of X, Y, and Z" can be interpreted as only X, only Y, only Z, or any combination of two or more of X, Y, and Z (such as XYZ, XYY, YZ, and ZZ). As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0033] Although the terms “first,” “second,” etc., may be used herein to describe various types of elements, these elements should not be limited by these terms. These terms are used to distinguish one element from another. Therefore, without departing from the publicly stated teachings, the first element discussed below may be referred to as the second element.

[0034] For descriptive purposes, spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side” (e.g., as in “sidewall”) may be used herein to describe the relationship between one element and another (other elements) as shown in the accompanying drawings. The spatial relative terms are intended to include different orientations of the device in use, operation, and / or manufacture, in addition to those depicted in the drawings. For example, if the device in the drawings is flipped, an element or feature described as “below” or “under” other elements or features would subsequently be oriented “above” said other elements or features. Thus, the illustrative term “below” can include both above and below orientations. Furthermore, the device may be otherwise oriented (e.g., rotated 90 degrees or in other orientations), thus interpreting the spatial relative terms used herein accordingly.

[0035] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well. Furthermore, the terms “comprising,” “including,” and / or variations thereof, when used in this specification, indicate the presence of the stated features, integrals, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. It should also be noted that, as used herein, the terms “basically,” “about,” and other similar terms are used as approximate terms rather than as terms of degree, thus explaining the inherent deviations in measurements, calculated values, and / or provided values ​​that would be recognized by those skilled in the art.

[0036] Various embodiments are described herein with reference to cross-sectional views and / or exploded views as schematic diagrams of idealized embodiments and / or intermediate structures. Thus, variations in the shapes shown in the drawings, for example, due to manufacturing techniques and / or tolerances, will be anticipated. Therefore, the embodiments disclosed herein should not necessarily be construed as limited to the specific shapes shown for the areas, but will include shape deviations, for example, due to manufacturing processes. In this way, the areas shown in the drawings can be schematic in nature, and the shapes of these areas may not reflect the actual shapes of the areas of the device, thus not necessarily intended to be limiting.

[0037] Figure 1 This is a perspective view of the display device in a first state according to an embodiment. Figure 2 This is a perspective view of the display device in a second state according to an embodiment. Figure 3 This is a perspective view of the display device in a third state according to an embodiment.

[0038] The display device 1 constructed according to the principles of the present invention may include various devices for displaying images or videos. Examples of the display device 1 include, but are not limited to, smartphones, mobile phones, tablet computers (PCs), personal digital assistants (PDAs), portable multimedia players (PMPs), televisions, game consoles, wristwatch-type electronic devices, head-mounted displays, personal computer monitors, laptop computers, car navigation systems, car dashboards, digital cameras, video cameras, outdoor billboards, electronic billboards, various medical devices, various examination devices, various household appliances including displays such as refrigerators and washing machines, Internet of Things (IoT) devices, etc.

[0039] Reference Figure 1 When viewed from above, the display device 1 may have a rectangular shape. According to an embodiment, when viewed from above, the display device 1 may have two longer sides extending along a first direction X and two shorter sides extending along a second direction Y intersecting the first direction X. It should be understood that this disclosure is not limited thereto. The display device 1 may have various shapes.

[0040] Display device 1 may include a display area DA and a non-display area NDA.

[0041] The display area (DA) can display images or videos. Multiple pixels can be set within the display area (DA). For example... Figure 1 As shown, the display area DA can be disposed on the upper surface of the display device 1. However, it will be understood that this disclosure is not limited thereto. The display area DA can also be disposed on at least one of the lower surface and the side surface of the display device 1.

[0042] The non-display area NDA may not display any images or videos. The non-display area NDA may be positioned around the display area DA. The non-display area NDA may surround the display area DA. The non-display area NDA may be an area provided with light-blocking components such as a black matrix. According to an embodiment, the display area DA may have a rectangular shape, and the non-display area NDA may be positioned along the four sides of the display area DA. However, it will be understood that this disclosure is not limited thereto.

[0043] Reference Figure 1 and Figure 2 The display device 1 can be a foldable device that can be folded or unfolded.

[0044] The display device 1 can be divided into a folded area FA and non-folded areas NFA1 and NFA2.

[0045] The folding area FA can be an area that folds or bends when the display device 1 is folded. The non-folding areas NFA1 and NFA2 can be areas that remain flat and do not fold or bend even when the display device 1 is folded.

[0046] The non-folded regions NFA1 and NFA2 may include a first non-folded region NFA1 and a second non-folded region NFA2.

[0047] The first non-folded region NFA1 and the second non-folded region NFA2 are arranged in the first direction X, and the folded region FA can be located between the first non-folded region NFA1 and the second non-folded region NFA2.

[0048] The display device 1 can be folded such that the first non-folded region NFA1 overlaps with the second non-folded region NFA2, or the first non-folded region NFA1 is tilted relative to the second non-folded region NFA2, or the display device 1 can be unfolded flat. For example, the display device 1 can be folded such that the first non-folded region NFA1 forms an angle of approximately greater than 0° and less than 180° relative to the second non-folded region NFA2, or the display device 1 can be unfolded such that the first non-folded region NFA1 and the second non-folded region NFA2 form an angle of approximately 180°.

[0049] like Figure 1 As shown, when the display device 1 is unfolded, the first non-folding region NFA1, the folding region FA, and the second non-folding region NFA2 can be laid out flat, so that they do not overlap each other in the thickness direction (i.e., the third direction Z). Figure 2 As shown, when the display device 1 is folded, the first non-folding region NFA1 and the second non-folding region NFA2 can overlap each other in the thickness direction. When the display device 1 is folded, the first non-folding region NFA1 and the second non-folding region NFA2 can be configured such that they are tilted relative to each other. In this case, at least a portion of the first non-folding region NFA1 and at least a portion of the second non-folding region NFA2 can overlap each other in the thickness direction, or they can not overlap each other in the thickness direction.

[0050] According to an embodiment, a folded region FA and two non-folded regions NFA1 and NFA2 are shown, but the number and arrangement of the folded region FA and the non-folded regions NFA1 and NFA2 are not limited thereto. In some embodiments, each of the elements of the display device 1 may also be divided into a folded region FA and / or non-folded regions NFA1 and NFA2.

[0051] like Figure 2 As shown, the display device 1 can be folded inward. When the display device 1 is folded inward, at least a portion of the display area DA is not exposed to the outside. For example, the display device 1 can be folded such that a portion of the display area DA faces another portion of the display area DA, and the display area DA can be surrounded by at least one other element that forms the appearance of the display device 1, so that the display area DA is not exposed to the outside.

[0052] However, it will be understood that the embodiments described herein are not limited thereto. The display device 1 can be folded outward. When the display device 1 is folded outward, the display area DA can be exposed to the outside (i.e., having an exposed area). For example, the display device 1 can be folded such that a portion of the display area DA does not face another portion of the display area DA, and the display area DA is exposed to the outside to form the appearance of the display device 1. The display device 1 can be an inward and outward folding device (i.e., a device capable of folding inward and outward).

[0053] Reference Figures 1 to 3 When the display device 1 is folded, a portion of the display area DA can be pulled out from the display device 1 and exposed to the outside. In this case, another portion of the display area DA can be located inside the display device 1 and is not exposed to the outside. Furthermore, the exposed portion of the display area DA can be pulled back into the display device 1, so that the portion is not exposed to the outside. The display area DA may refer to the display module DM, which will be described later.

[0054] At least one of the elements of the display device 1 can slide, such that a portion of the display area DA is exposed to the outside. (See later...) Figures 6 to 10 As described, the display area DA can be pulled in and pulled out because the display module DM that provides the display area DA and the folding member FM that supports the display module DM slide.

[0055] Reference Figures 1 to 3 The display device 1 may have a first state in which the display device 1 is unfolded, a second state in which the display device 1 is folded, and a third state in which a portion of the display device 1 is slid. The display device 1 may be configured such that the display device 1 can freely transition from one of the first state, the second state, and the third state to another of the first state, the second state, and the third state.

[0056] In the first state, the first non-folded region NFA1 and the second non-folded region NFA2 can be located side by side on a plane. In the second state, the first non-folded region NFA1 and the second non-folded region NFA2 can be arranged parallel to each other and completely overlap each other in the thickness direction. In the third state, the first non-folded region NFA1 and the second non-folded region NFA2 can be arranged parallel to each other, but can not completely overlap each other in the thickness direction.

[0057] The first state, the second state, and the third state can respectively represent the state in which the display area DA is completely exposed to the outside, the state in which the display area DA is not exposed to the outside, and the state in which only a part of the display area DA is exposed to the outside.

[0058] The second state may include the state in which the display device 1 is completely folded, the state in which the display device 1 is half-folded, the state in which the display device 1 is folded inward, and the state in which the display device 1 is folded outward. The third state may be the state in which a portion of the display device 1 slides, causing at least one of the first non-folded region NFA1 and the second non-folded region NFA2 to extend.

[0059] For example, in the first state, the angle between the first non-folding region NFA1 and the second non-folding region NFA2 of the display device 1 can be approximately 180°. In the second state and / or the third state, the angle between the first non-folding region NFA1 and the second non-folding region NFA2 of the display device 1 can be approximately 0° or greater and less than 180°, and / or approximately greater than 180° and less than 360°.

[0060] Reference Figures 1 to 3 The display device 1 may include a display module DM and a folding component FM.

[0061] The display module DM and the folding member FM can be disposed throughout the first non-folding region NFA1, the folding region FA, and the second non-folding region NFA2. The display module DM can form the upper surface of the display device 1, and the folding member FM can be disposed on the lower surface of the display module DM to support the display module DM. The display module DM can be flexible, such that at least a portion of the display module DM can be bent. The folding member FM can be configured to bend the display module DM by an externally applied force.

[0062] The folding component FM may include a hinge component HG, a first base component BS1, a second base component BS2, and a third base component BS3.

[0063] The hinge component HG may be primarily disposed in the folding region FA. The hinge component HG may provide at least one axis of rotation. The first base component BS1 and the second base component BS2 may rotate about the at least one axis of rotation. The hinge component HG may include mechanical hinges and elastic hinges. For example, the hinge component HG may include at least one component (such as a hinge, a rod component SFT) for folding the display device 1 (see...). Figure 6 (rotor and cam).

[0064] The first base member BS1 can be mainly disposed in the first non-folded region NFA1. One side of the first base member BS1 can be rotatably connected to one side of the hinge member HG.

[0065] The second base member BS2 and the third base member BS3 can be mainly disposed in the second non-folded region NFA2. One side of the second base member BS2 can be rotatably connected to the other side of the hinge member HG. The third base member BS3 can be disposed on the other side of the second base member BS2.

[0066] Compared to the first base member BS1, the second base member BS2 and the third base member BS3 can have smaller dimensions. When viewed from above, the sum of the areas of the second base member BS2 and the third base member BS3 can be substantially equal to the area of ​​the first base member BS1. Therefore, as Figure 2 As shown, when the display device 1 is folded, the edge of the first base member BS1 can be aligned with the edges of the second base member BS2 and the third base member BS3 that form the edge of the display device 1.

[0067] Despite Figures 1 to 3 In the example shown, the first base member BS1, the second base member BS2, and the third base member BS3 are covering members that form the appearance of the display device 1, but this disclosure is not limited thereto. The first base member BS1, the second base member BS2, and / or the third base member BS3 may include other elements forming the display device 1 besides the display module DM (e.g., protective members for protecting the display module DM, frame members for mounting electronic components, etc.). As another example, the first base member BS1, the second base member BS2, and / or the third base member BS3 may form part of the hinge member HG.

[0068] Figure 4 It is along Figure 1 The sectional view of the display module is taken by line A-A'. Figure 5 yes Figure 4 A cross-sectional view of the display panel.

[0069] Reference Figure 4 The display device 1 may include an upper stacking structure US stacked on the upper surface of the display panel DP and a lower stacking structure LS stacked on the lower surface of the display panel DP.

[0070] The upper surface of the display panel DP can be a surface for displaying images or videos, and the lower surface of the display panel DP can be a surface opposite to the upper surface.

[0071] The display panel DP, upper stacking structure US, and lower stacking structure LS can be disposed throughout the first non-folding region NFA1, the folding region FA, and the second non-folding region NFA2. At least one of the components forming the upper stacking structure US and the lower stacking structure LS can be separated at the folding region FA. When they are separated, the stress generated when the display device 1 is folded can be reduced.

[0072] Display panels (DP) display images and may include self-emissive display panels such as organic light-emitting display panels (OLED), inorganic light-emitting display panels (EL), quantum dot light-emitting display panels (QED), micro LED display panels (microLED), nano LED display panels (nanoLED), plasma display panels (PDP), field emission display panels (FED), and cathode ray tube display panels (CRT), as well as light-receiving display panels such as liquid crystal display panels (LCD) and electrophoretic display panels (EPD).

[0073] The display panel DP may also include a touch component. The touch component may be implemented as a panel or film separate from the display panel DP and attached to it, or it may be implemented as a touch layer within the display panel DP. Although in the following description the touch component is disposed within the display panel DP to be included in the display panel DP, it will be understood that this disclosure is not limited thereto.

[0074] Reference Figure 5 The display panel DP may include a substrate SUB, a circuit driving layer DRL on the substrate SUB, an emitter layer EML on the circuit driving layer DRL, an encapsulation layer ENL on the emitter layer EML, and a touch layer TSL on the encapsulation layer EML.

[0075] The substrate SUB can be a flexible substrate comprising a flexible polymer material such as polyimide. Therefore, the display panel DP can be bent, folded, or rolled.

[0076] The circuit driving layer DRL can be disposed on the substrate SUB. The circuit driving layer DRL may include circuitry for driving the emitter layer EML for each pixel. The circuit driving layer DRL may include multiple thin-film transistors.

[0077] An emitter layer (EML) can be disposed on a circuit driver layer (DRL). The emitter layer (EML) may include an organic emitter layer. The emitter layer (EML) can emit light with various brightness levels according to the drive signals transmitted from the circuit driver layer (DRL).

[0078] The encapsulation layer ENL can be disposed on the emitter layer EML. The encapsulation layer ENL may include an inorganic film or a stack of inorganic and organic films.

[0079] The touch layer (TSL) can be disposed on the encapsulation layer (ENL). The touch layer (TSL) can sense touch input and perform the functions of the touch components. The touch layer (TSL) can include multiple sensing areas and multiple sensing electrodes.

[0080] Return to reference Figure 4The upper stacked structure US may include polarizing member POL, cover window CW and cover window protective layer CWP stacked sequentially on top of each other from the display panel DP toward the upper side.

[0081] A polarizing element (POL) can be disposed on the upper surface of the display panel (DP). The polarizing element (POL) polarizes light passing through it. It reduces the reflection of external light. The polarizing element (POL) can be a polarizing film. It can be replaced by multiple color filters and a black matrix disposed between the color filters.

[0082] A cover window (CW) can be disposed on the upper surface of the polarizing member (POL). The cover window (CW) is used to protect the display panel (DP). The cover window (CW) can be made of a transparent material. The cover window (CW) can include, for example, glass or plastic. According to an embodiment, the cover window (CW) can be made of, but is not limited to, glass.

[0083] A cover window protective layer (CWP) can be disposed on the upper surface of the cover window (CW). The cover window protective layer (CWP) can be implemented as a transparent polymer film comprising, for example, at least one selected from the group consisting of: polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyethersulfone (PES), polyimide (PI), polyarylate (PAR), polycarbonate (PC), polymethyl methacrylate (PMMA), and cyclic olefin copolymer (COC) resin.

[0084] The upper stacked structure US may include upper bonding members UCM1, UCM2, and UCM3 that bond adjacent elements among the stacked elements. Upper bonding members UCM1, UCM2, and UCM3 may be optically transparent. Upper bonding members UCM1, UCM2, and UCM3 may include optically transparent adhesives, optically transparent resins, and pressure-sensitive adhesives (PSA). According to an embodiment, a first upper bonding member UCM1 may be disposed between a cover window protective layer CWP and a cover window CW to bond the cover window protective layer CWP and the cover window CW; a second upper bonding member UCM2 may be disposed between the cover window CW and a polarizing member POL to bond the cover window CW and the polarizing member POL; and a third upper bonding member UCM3 may be disposed between the polarizing member POL and the display panel DP to bond the polarizing member POL and the display panel DP.

[0085] The lower stacked structure LS may include a polymer film layer PF, a cover panel CPNL, and rigid members RG1 and RG2 stacked sequentially on each other from the display panel DP toward the lower side.

[0086] The polymer film layer (PF) can be disposed on the lower surface of the display panel (DP). The polymer film layer (PF) protects the display panel (DP). The polymer film layer (PF) can include, for example, polyimide (PI), polyethylene terephthalate (PET), polycarbonate (PC), polyethylene (PE), polypropylene (PP), polysulfone (PSF), polymethyl methacrylate (PMMA), cellulose triacetate (TAC), cyclic olefin polymers (COP), etc.

[0087] A cover panel CPNL can be disposed on the lower surface of a polymer film layer PF. The cover panel CPNL may comprise multiple layers, each of which may be made of a rigid or elastic material. The cover panel CPNL can perform functions such as supporting the display panel DP, enhancing the rigidity of the display panel DP, and buffering impacts applied to the display panel DP.

[0088] The cover panel CPNL may include at least one functional layer. The functional layer may include at least one of, for example, a digitizer, an electromagnetic wave shielding layer, a shock absorption layer, and a heat dissipation layer.

[0089] Rigid members RG1 and RG2 may be disposed on the lower surface of the cover panel CPNL. Rigid members RG1 and RG2 may include a first rigid member RG1 and a second rigid member RG2 spaced apart from each other relative to the folded region FA. The first rigid member RG1 and the second rigid member RG2 may be used to support components stacked in the first non-folded region NFA1 and components stacked in the second non-folded region NFA2, respectively. Rigid members RG1 and RG2 may include metal. For example, rigid members RG1 and RG2 may be metal plates. Rigid members RG1 and RG2 may serve as heat dissipation components to release heat generated by the display module DM to the outside.

[0090] The edges of the first rigid member RG1 adjacent to the folded region FA and the edges of the second rigid member RG2 adjacent to the folded region FA can be respectively located in the first non-folded region NFA1 and the second non-folded region NFA2. In this case, the edges of the first rigid member RG1 and / or the second rigid member RG2 can be spaced apart from the boundary of the folded region FA. Therefore, the first non-folded region NFA1 and / or the second non-folded region NFA2 can contain... Figure 6 The supporting member SF, sliding member SLM, and / or plate member WP are disposed in the space on the lower surface of other elements stacked on rigid members RG1 and RG2. It should be understood that the embodiments described herein are not limited thereto. The edges of the first rigid member RG1 and the second rigid member RG2 may be aligned with the boundaries of the folded area FA.

[0091] The lower stacked structure LS may also include lower bonding members LCM1, LCM2, and LCM3 that bond adjacent elements among the stacked elements. For example, a first lower bonding member LCM1 may be disposed between the display panel DP and the polymer film layer PF to bond the display panel DP and the polymer film layer PF; a second lower bonding member LCM2 may be disposed between the polymer film layer PF and the cover panel CPNL to bond the polymer film layer PF and the cover panel CPNL; and a third lower bonding member LCM3 may be disposed between the cover panel CPNL and rigid members RG1 and RG2 to bond the cover panel CPNL to the rigid members RG1 and RG2.

[0092] Figure 6 It is along Figure 1 A cross-sectional view of the display device taken by line B-B'. Figure 7 It is along Figure 2 A cross-sectional view of the display device taken by line C-C'. Figure 8 It is along Figure 3 The cross-sectional view of the display device is taken by line D-D'. Figure 9 yes Figure 7 A magnified perspective view of part P1. Figure 10 yes Figure 8 A magnified perspective view of part P2.

[0093] In the following description, for clarity, Figures 6 to 8 Other components of the display module DM besides the display panel DP and rigid members RG1 and RG2 are not described below. The following description will focus on the display panel DP of the display module DM. The display panel DP may refer to the entire display module DM including the display panel DP, or it may refer to at least one of the display panel DP, the upper stack structure US, and the lower stack structure LS.

[0094] Reference Figures 6 to 10 As described above, the hinge component HG can be mainly disposed in the folding region FA, the first base component BS1 can be mainly disposed in the first non-folding region NFA1, and the second base component BS2 and the third base component BS3 can be mainly disposed in the second non-folding region NFA2.

[0095] The hinge component HG can provide a first rotation axis RX1 and a second rotation axis RX2 that are spaced apart from each other and extend along the second direction Y. For example... Figure 7 and Figure 8As shown, the first base member BS1 is rotatable about a first rotation axis RX1, and the second base member BS2 is rotatable about a second rotation axis RX2. A third base member BS3 can be connected to the second base member BS2 via another member such as a sliding member SLM, so as to rotate together with the second base member BS2 about the second rotation axis RX2. The first rotation axis RX1 and the second rotation axis RX2 can be imaginary axes disposed outside the hinge member HG.

[0096] like Figures 6 to 8 As shown, each of the first base member BS1, the second base member BS2, and the third base member BS3 may include a space recessed in the thickness direction. A support member SF, a hinge member HG, a sliding member SLM, and a plate member WP may be mounted in said space. It will be noted that the shapes of the first base member BS1, the second base member BS2, and the third base member BS3 are not limited thereto.

[0097] Reference Figures 6 to 10 The display device 1 may also include a sliding member SLM and a plate member WP disposed on the lower surface of the display module DM.

[0098] The sliding member SLM and the plate member WP can be disposed in the second non-folded region NFA2. It should be understood that the embodiments described herein are not limited thereto. At least one of the sliding member SLM and the plate member WP can be partially disposed in the folded region FA.

[0099] The sliding member SLM can be positioned between the second base member BS2 and the display module DM, and between the third base member BS3 and the display module DM. The sliding member SLM can slide along the radial direction of the center of curvature of the curved portion DP_CV, the first rotation axis RX1, and / or the second rotation axis RX2. The radial direction can represent a direction that intersects with and extends away from the first rotation axis RX1 or the second rotation axis RX2. The radial direction can be orthogonal to the first rotation axis RX1 or the second rotation axis RX2, but the embodiments described herein are not limited thereto.

[0100] The center of curvature of the curved portion DP_CV, the radial direction of the first rotation axis RX1 and / or the second rotation axis RX2 may include a direction toward the edge of the display panel DP and another direction opposite to said one direction. The edge of the display panel DP may refer to the edge located in the second non-folded region NFA2 that overlaps with at least one of the second rigid member RG2 and the third base member BS3 in the thickness direction. According to the design of the display device 1, the edge of the display panel DP may overlap with the sliding member SLM in the thickness direction.

[0101] The sliding member SLM can connect the second base member BS2 and the third base member BS3, such that the distance between the second base member BS2 and the third base member BS3 is variable. This distance can generally be a distance in the radial direction of the first rotation axis RX1 and / or the second rotation axis RX2, but the embodiments described herein are not limited to this.

[0102] like Figures 6 to 8 As shown, a step is formed on the upper part of the sliding member SLM to accommodate and secure one side of the second rigid member RG2. The upper part of the sliding member SLM can directly contact the second rigid member RG2, and the lower part of the sliding member SLM can directly contact the second base member BS2 and the third base member BS3. It should be understood that the embodiments described herein are not limited thereto.

[0103] like Figures 7 to 10 As shown, the sliding member SLM can move relative to the hinge member HG and / or the second base member BS2. The sliding member SLM can be fixed relative to the display module DM and / or the third base member BS3. When the sliding member SLM slides, the display module DM and / or the third base member BS3 can also move relative to the hinge member HG and / or the second base member BS2.

[0104] The side of the sliding member SLM facing the hinge member HG is slidably connected to the second base member BS2, and the opposite side of the sliding member SLM is fixed to the third base member BS3, with the upper part of the sliding member SLM fixed to the lower surface of the display module DM. For example, in Figures 6 to 8 In the middle, one side and the opposite side of the sliding member SLM can be the left part of the sliding member SLM that overlaps with the second base member BS2 and the right part of the sliding member SLM that overlaps with the third base member BS3, respectively.

[0105] One side of the sliding member SLM, the third base member BS3, and the display module DM can move away from or towards the hinge member HG, the first rotation axis RX1, and / or the second rotation axis RX2. For example, one side of the sliding member SLM, the third base member BS3, and the display module DM can generally move radially along the first rotation axis RX1 and / or the second rotation axis RX2. It should be understood that the embodiments described herein are not limited thereto. One side of the display module DM may include the edge of the display module DM disposed in the second non-folding region NFA2 and the portion of the display module DM adjacent to said edge.

[0106] The sliding member SLM may include an inclined surface SLM_INC disposed on one side. For example, the sliding member SLM may have an overall rectangular shape in cross-section, with the corner on the side facing the hinge member HG obliquely cut off. The side of the sliding member SLM on which the inclined surface SLM_INC is formed may be spaced apart from the display module DM to provide space for rotation of the plate member WP.

[0107] The inclined surface SLM_INC can be tilted in the direction along which the sliding member SLM moves and / or in the radial direction of the second rotation axis RX2 (first rotation axis RX1). The inclined surface SLM_INC can be tilted such that the thickness of the sliding member SLM decreases towards the hinge member HG. The inclined surface SLM_INC can limit the rotation angle of the plate member WP.

[0108] like Figure 6 and Figure 7 As shown, in the first and second states, the sliding member SLM can be housed within the second base member BS2 and the third base member BS3, and therefore can be kept from external exposure. Figure 8 As shown, in the third state, a portion of the sliding member SLM can be exposed to the outside between the second base member BS2 and the third base member BS3.

[0109] Reference Figures 6 to 10 The plate member WP can be positioned on the side of the sliding member SLM facing the hinge member HG. The plate member WP can also be positioned between the hinge member HG and the sliding member SLM. For example... Figure 9 and Figure 10 As shown, for example, the plate member WP can be formed as an airfoil member that rotates about the rod member SFT.

[0110] like Figures 6 to 8 As shown, the plate member WP can be disposed on the lower surface of the display module DM to support the display module DM. Specifically, the plate member WP can be configured to support the portion of the display panel DP adjacent to the folding area FA and / or the hinge member HG. A portion of the display panel DP may not be covered or supported by the second rigid member RG2. One side of the plate member WP can be rotatably connected to the side of the sliding member SLM facing the hinge member HG, and the opposite side of the plate member WP can extend toward the hinge member HG. Figure 8As shown, when the sliding member SLM moves, the plate member WP can rotate around one side of the plate member WP. Therefore, when the display device 1 transitions from the second state to the third state (or from the third state to the second state), the curvature of the display module DM (display panel DP) can change. The curvature can be the reciprocal of the radius of curvature of the curved portion DP_CV of the display module DM (display panel DP). That is, the curvature can increase with a decreasing radius, and the curvature can decrease with an increasing radius.

[0111] Reference Figures 6 to 10 The plate component WP can include the plate portion WP_PLT and the rod connection portion WP_SC.

[0112] The board portion WP_PLT can be made of a flat, plate-like component to support the lower surface of the display module DM (display panel DP). For example... Figure 8 and Figure 10 As shown, when the display device 1 transitions to the third state, the plate portion WP_PLT can be placed on the inclined surface SLM_INC of the sliding member SLM.

[0113] The rod-joint portion WP_SC can be disposed on one side of the plate portion WP_PLT to rotatably join the plate portion WP_PLT to the rod member SFT, which will be described later.

[0114] The rod-joint portion WP_SC can be configured to surround the rod member SFT and can have a circular outer peripheral surface, for example, a cylindrical shape conforming to the shape of the outer peripheral surface of the rod member SFT. Therefore, damage to the display module DM can be prevented when it comes into contact with the rod member SFT.

[0115] Reference Figure 9 and Figure 10 The plate portion WP_PLT may include at least one protrusion WP_PT.

[0116] The protrusion WP_PT can be provided on the opposite side of the plate portion WP_PLT, which is opposite to the side of the plate portion WP_PLT that connects to the rod engagement portion WP_SC. The protrusion WP_PT can protrude in a direction intersecting the movement direction of the sliding member SLM and can be inserted into the guide groove GL, which will be described in more detail later.

[0117] Reference Figures 6 to 10 The display device 1 may also include a rod member SFT disposed on one side of the sliding member SLM.

[0118] The rod member SFT can penetrate through one side of the rod joint WP_SC of the plate member WP and the sliding member SLM. For example... Figure 9 and Figure 10As shown, the rod member SFT can have a cylindrical shape extending along the second direction Y.

[0119] Reference Figures 8 to 10 The second base component BS2 may include a guide groove GL for the rotation angle of the guide plate component WP.

[0120] At least a portion of the guide groove GL may be disposed between the hinge member HG and the sliding member SLM. In cross-section, at least a portion of the guide groove GL may overlap with the side of the sliding member SLM facing the hinge member HG in the second direction Y. The guide groove GL may extend obliquely in the direction along which the sliding member SLM moves.

[0121] like Figure 6 and Figure 7 As shown, in both the first and second states, the guide groove GL can extend from one side of the second base member BS2 connected to the hinge member HG to the opposite side of the second base member BS2. The distance from the lower surface of the display module DM (display panel DP) can increase toward the opposite side of the second base member BS2.

[0122] The height of the guide groove GL, measured from the bottom surface BS2_BS of the second base member BS2, can decrease toward the other side of the second base member BS2. The guide groove GL can be disposed on the inner surface BS2_SS of the second base member BS2 facing the sliding member SLM and forming the inner space of the second base member BS2, but this disclosure is not limited thereto.

[0123] Reference Figure 7 and Figure 8 The display panel DP can be bent to have curvature in the second and third states. In the following description, for ease of illustration, the portion of the display panel DP that is bent when the display device 1 is folded is referred to as the curved portion DP_CV.

[0124] like Figure 7 As shown, in the second state, one end of the display panel DP disposed on the third substrate member BS3 and the opposite end of the display panel DP disposed on the first substrate member BS1 can be aligned with each other in the thickness direction. One edge and the opposite edge of the display panel DP can respectively include one edge of the display panel DP disposed on the third substrate member BS3 and the other edge of the display panel DP disposed on the first substrate member BS1.

[0125] When the display device 1 transitions from the second state to the third state, the sliding member SLM can slide in the cross-section along a direction toward one end (one edge) of the display panel DP disposed on the third base member BS3. The sliding member SLM can move the portion (one side) of the display panel DP disposed on the third base member BS3 along said direction. In this case, the plate member WP can move in the thickness direction of the display panel DP (e.g., in...). Figure 8 The curvature of the curved portion DP_CV is increased by rotating it downwards and / or counterclockwise. Therefore, the exposed area of ​​the upper surface of the display panel DP can be increased.

[0126] As the plate member WP rotates, the portion of the display panel DP that is not exposed to the outside and is connected to the curved portion DP_CV to lie on the plate member WP can also rotate in the thickness direction about a point on the display panel DP (e.g., the point that overlaps with the rod member SFT in the thickness direction). The thickness direction can refer to the direction in which the curvature of the curved portion DP_CV decreases (e.g., Figure 8 (in the downward and / or counterclockwise direction).

[0127] Conversely, when the display device 1 transitions from the third state to the second state, the sliding member SLM can slide in the opposite direction. The sliding member SLM can move the portion (one side) of the display panel DP disposed on the third base member BS3 in the opposite direction. In this case, the plate member WP can move in the thickness direction of the display panel DP (e.g., in...). Figure 8 The curvature of the curved portion DP_CV is reduced by rotating it upwards and / or clockwise. Therefore, the area of ​​the upper surface of the display panel DP exposed to the outside can be reduced.

[0128] As the panel member WP rotates, the portion of the display panel DP that is not exposed to the outside and is connected to the curved portion DP_CV to be located on the panel member WP can also be in the direction in which the curvature of the curved portion DP_CV decreases (e.g., in...). Figure 8 Rotate around the point DP on the display panel in the downward and / or counterclockwise direction.

[0129] like Figures 7 to 10As shown, the guide groove GL can rotate in the direction in which the curvature of the curved portion DP_CV of the guide plate member WP decreases when the display device 1 transitions from the second state to the third state, and can also rotate in the direction in which the curvature of the curved portion DP_CV of the guide plate member WP increases when the display device 1 transitions from the third state to the second state. By rotating the plate member WP as described above, the curvature of the curved portion DP_CV of the display panel DP is controlled when the display device 1 repeatedly transitions between the second and third states, and the stress applied to the curved portion DP_CV can be reduced.

[0130] When the display device 1 changes from the second state to the third state or from the third state to the second state, the distance between the sliding member SLM and the hinge member HG can change.

[0131] When the display device 1 transitions from the second state to the third state, the sliding member SLM can move in the direction in which the distance between the sliding member SLM and the hinge member HG increases. In this case, the plate member WP can rotate in the direction in which the curvature of the bent portion DP_CV decreases.

[0132] When the display device 1 transitions from the third state to the second state, the sliding member SLM can move in the direction in which the distance between the sliding member SLM and the hinge member HG decreases. In this case, the plate member WP can rotate in the direction in which the curvature of the bent portion DP_CV increases.

[0133] In other words, the aforementioned direction can represent the direction in which the distance between the sliding member SLM and the hinge member HG increases, and the opposite direction can represent the direction in which the distance between the sliding member SLM and the hinge member HG decreases.

[0134] like Figure 7 and Figure 8As shown, the curved portion DP_CV can have a first curvature in a second state and a second curvature smaller than the first curvature in a third state. Specifically, when the display device 1 transitions from the second state to the third state, the radius of curvature of the curved portion DP_CV can increase from the first radius of curvature R1 to a second radius of curvature R2 larger than the first radius of curvature R1. For example, the second radius of curvature R2 can be approximately 2 to 6 times the first radius of curvature R1. As another example, the first radius of curvature R1 of the first curvature can be approximately 0.5 mm to 3.5 mm, and the second radius of curvature R2 of the second curvature can be approximately 3.5 mm to 4.5 mm. It should be understood that this disclosure is not limited thereto. Conversely, when the display device 1 transitions from the third state to the second state, the size of the portion forming the curved portion DP_CV of the display panel DP can be reduced. Specifically, when the display device 1 transitions from the third state to the second state, the radius of curvature of the curved portion DP_CV can decrease from the second radius of curvature R2 to a first radius of curvature R1 smaller than the second radius of curvature R2.

[0135] When the display device 1 transitions from the second state to the third state, the size of the curved portion DP_CV forming the display panel DP can be increased. When the display device 1 transitions from the third state to the second state, the size of the curved portion DP_CV forming the display panel DP can be decreased.

[0136] Reference Figures 6 to 8 The display device 1 may also include a support member SF disposed in the first non-folding region NFA1.

[0137] A support member SF can be disposed on the lower surface of the display panel DP to support the display panel DP. The support member SF can be configured to cover at least a portion of the lower surface of the display panel DP. The support member SF can be spaced apart from the sliding member SLM, and the folding area FA is located between the support member SF and the sliding member SLM. The support member SF can be positioned between the display module DM and the first base member BS1. At least a portion of the first rigid member RG1 can be mounted and fixed to the upper part of the support member SF. For example, as... Figure 6 As shown, a step is formed at the upper part of the support member SF, allowing a portion of the first rigid member RG1 to be mounted and secured to the upper part of the support member SF. Figures 6 to 8As shown, the support member SF can be disposed parallel to the sliding member SLM in the first direction X on the lower surface of the display panel DP in a first state. The support member SF can be configured to face the sliding member SLM in a second and third state. The support member SF can be configured in the second and third states such that it at least partially overlaps the sliding member SLM in the thickness direction. The area of ​​overlap between the sliding member SLM and the support member SF in the thickness direction in the second state can be larger than the area of ​​overlap between the sliding member SLM and the support member SF in the thickness direction in the third state. It should be understood that this disclosure is not limited thereto. The area of ​​overlap between the sliding member SLM and the support member SF can vary depending on the design of the display device 1.

[0138] The first base component BS1 and the second base component BS2 may each include a first sidewall SW1 and a second sidewall SW2.

[0139] The first sidewall SW1 can be disposed on the side of the support member SF facing the hinge member HG. The first sidewall SW1 can protrude from the bottom surface of the inner space forming the first base member BS1. The first sidewall SW1 can support one side of the support member SF to prevent the support member SF from fluctuating.

[0140] The second sidewall SW2 can be provided on the side of the sliding member SLM facing the hinge member HG. The second sidewall SW2 can protrude from the bottom surface of the inner space forming the second base member BS2. For example... Figures 6 to 8 As shown, the second sidewall SW2 can contact or be spaced apart from one side of the sliding member SLM as the sliding member SLM moves, thereby limiting the movement distance of the sliding member SLM. The second sidewall SW2 can contact the sliding member SLM in the first and second states, but can be spaced apart from the sliding member SLM in the third state.

[0141] Reference Figures 6 to 8 The portion of the display panel DP that is disposed on the support member SF can be attached to the support member SF. Similarly, the portion of the display panel DP that is disposed on the sliding member SLM can be attached to the sliding member SLM. Therefore, when the display device 1 transitions from the first state to the third state, the position of the display panel DP relative to the support member SF and the sliding member SLM can be fixed. The portion of the display panel DP disposed on the plate member WP may not be attached to the plate member WP, but the embodiments described herein are not limited thereto.

[0142] exist Figure 6In this embodiment, the display panel DP can be directly mounted on and attached to the support member SF, but the embodiments described herein are not limited thereto. At least one layer may be further disposed between the display panel DP and the support member SF. The at least one layer may include, for example... Figure 4 At least one of the lower stacked structures LS shown in the figure. In some embodiments, as said at least one layer, the display device 1 may include an adhesive layer disposed between the display panel DP and the support member SF to attach the display panel DP to the support member SF.

[0143] According to the embodiments, such as Figure 6 As shown, the display panel DP may be attached to the support member SF, the first rigid member RG1, the sliding member SLM, and the second rigid member RG2. It should be understood that the embodiments described herein are not limited thereto. The shapes of the support member SF and the sliding member SLM may vary to support the display panel DP, and the display panel DP may be attached only to the support member SF and / or the sliding member SLM. In some embodiments, at least one of the first rigid member RG1 and the second rigid member RG2 may be removed.

[0144] Reference Figures 6 to 8 The display panel DP can include Figure 11 The first unattached area UAR is defined within the first non-folded area NFA1. The first unattached area UAR can refer to the portion of the display panel DP that is disposed on the support member SF but not attached to the support member SF. Specifically, in the first non-folded area NFA1, only a portion of the portion of the display panel DP that overlaps with the support member SF in the thickness direction can be attached and fixed to the support member SF, while the remaining portion may not be attached to the support member SF. Figures 6 to 8 In this embodiment, the first unattached area UAR is located only on the support member SF, but the embodiments described herein are not limited to this. The first unattached area UAR may be provided throughout the support member SF and the first rigid member RG1. The adhesive layer bonding between the display panel DP and the support member SF may be placed between the display panel DP and the support member SF, and the first unattached area UAR may refer to the portion of the display panel DP that overlaps with the display panel DP in the absence of an adhesive layer, and is therefore not bonded by the adhesive layer.

[0145] like Figures 6 to 8As shown, the first unattached area UAR may overlap with the support member SF and / or the first base member BS1 in the thickness direction. In a first state, the first unattached area UAR may not overlap with the sliding member SLM, the plate member WP, the second base member BS2, or the third base member BS3. In a second state, the first unattached area UAR may overlap with at least one of the sliding member SLM, the plate member WP, and the second base member BS2 in the thickness direction. For example, as... Figure 7 As shown, in the second state, the first unattached area UAR may overlap with the sliding member SLM, the plate member WP, and the second substrate member BS2 in the thickness direction. It should be understood that this disclosure is not limited thereto. In the third state, the first unattached area UAR may overlap with the curved portion DP_CV of the display panel DP. In this case, the first unattached area UAR may not overlap with at least one of the plate member WP and the sliding member SLM. For example, in the third state, the first unattached area UAR may be configured such that it does not overlap with the plate member WP and the sliding member SLM, but the embodiments described herein are not limited thereto.

[0146] In the first and second states, the first unattached area UAR can be in close contact with the supporting member SF, and in the third state, the first unattached area UAR can be spaced apart from the supporting member SF. Figure 8 As shown, when the display device 1 transitions from the second state to the third state, the first unattached area UAR can be spaced apart from the support member SF. Specifically, when the display device 1 transitions from the second state to the third state, the sliding member SLM can move in a direction away from the first rotation axis RX1, the second rotation axis RX2, and / or the hinge member HG including the first rotation axis RX1 and the second rotation axis RX2, and the portion of the display panel DP attached to the sliding member SLM can be pulled by the sliding member SLM. In this case, the first unattached area UAR can be bent to have curvature and can be spaced apart from the support member SF. Then, the first unattached area UAR can form part of the bent portion DP_CV. As the sliding member SLM moves away from the hinge member HG, the first unattached area UAR can gradually space apart from the portion provided on the end of the support member SF facing the hinge member HG.

[0147] When the display device 1 transitions from the second state to the third state, the curved portion DP_CV of the display panel DP can bend at a second curvature smaller than the first curvature through the space formed by the sliding member SLM sliding and the plate member WP rotating. As described above, the second radius of curvature R2 of the second curvature can be larger than the first radius of curvature R1 of the first curvature. Because the display panel DP has a first unattached area UAR, the display panel DP can bend at a gentler curvature, thus reducing the stress applied to the display panel DP.

[0148] Figure 11 This is a cross-sectional view of a display device in a first state according to another embodiment. Figure 11 This is a cross-sectional view of the display device taken along line B-B'. Figure 12 This is a cross-sectional view of the display device in a second state according to another exemplary embodiment. Figure 12 This is a cross-sectional view of the display device taken along line C-C'. Figure 13 This is a cross-sectional view of a display device in a third state according to another embodiment. Figure 13 It is a cross-sectional view of the display device taken along line D-D'. Figure 14 This is a cross-sectional view of a display device according to another embodiment during the transition from a third state to a second state.

[0149] Figures 11 to 14 Implementation examples and Figures 1 to 10 The difference in the embodiment is that the plate member WP is removed.

[0150] The following description will focus on the display panel DP of the display module DM. The display panel DP may refer to the entire display module DM including the display panel DP, or it may refer to at least one of the display panel DP, the upper stack structure US, and the lower stack structure LS.

[0151] Reference Figures 11 to 14 The display device 1a may include a display panel DP, a support member SF, a sliding member SLM, a first base member BS1, a second base member BS2, a third base member BS3, and a hinge member HG. Figures 1 to 10 Unlike the exemplary embodiments, the first rigid member RG1 and the second rigid member RG2 may also be removed. It should be understood that this disclosure is not limited thereto. In some exemplary embodiments, to... Figures 1 to 10 In a manner substantially the same or similar to that shown, the first rigid member RG1 and the second rigid member RG2 can be placed between the display panel DP and the support member SF, and between the display panel DP and the sliding member SLM.

[0152] As described above, the display panel DP can be disposed throughout the first non-folding region NFA1, the folding region FA, and the second non-folding region NFA2. The display panel DP can be disposed on the support member SF disposed in the first non-folding region NFA1 and the sliding member SLM disposed in the second non-folding region NFA2.

[0153] The display panel DP can be attached to the upper surface of the support member SF and / or the upper surface of the sliding member SLM. The upper surface can refer to the surface facing the display panel DP. The upper surface can be opposite to the lower surface facing the first base member BS1, the second base member BS2 and / or the third base member BS3.

[0154] The display panel DP can be directly attached to the upper surface of the support member SF and / or the upper surface of the sliding member SLM, but this disclosure is not limited thereto. In some embodiments, at least one additional layer may be placed between the display panel DP and the support member SF and / or between the display panel DP and the sliding member SLM to support and engage the display panel DP. For example, see reference to... Figures 6 to 8 The at least one other layer may be a first rigid member RG1 and a second rigid member RG2. In this case, as... Figures 6 to 8 As shown, the portion of the display panel DP located in the first non-folding region NFA1 can be attached to the support member SF and / or the first rigid member RG1, and the portion of the display panel DP located in the second non-folding region NFA2 can be attached to the sliding member SLM and / or the second rigid member RG2. It should be understood that the embodiments described herein are not limited thereto.

[0155] As described above, the display panel DP may include a first unattached area UAR. The first unattached area UAR may be located within the first non-folded area NFA1. The first unattached area UAR may refer to the portion of the display panel DP disposed on the upper surface of the support member SF but not attached to the support member SF. In some embodiments, when the first rigid member RG1 is positioned between the display panel DP and the support member SF, the first unattached area UAR may refer to the portion of the display panel DP disposed on the upper surface of the first rigid member RG1 but not attached to the first rigid member RG1.

[0156] like Figures 11 to 13As shown, in the first state, the first unattached area UAR may overlap with the support member SF and / or the first base member BS1 in the thickness direction. In the second state, the first unattached area UAR may overlap with the support member SF, the curved portion DP_CV of the display panel DP, and the sliding member SLM in the thickness direction. In the third state, the first unattached area UAR may form part of the curved portion DP_CV of the display panel DP. In this case, the first unattached area UAR may not overlap with the sliding member SLM in the thickness direction. It should be understood that the embodiments described herein are not limited thereto. In the third state, the first unattached area UAR may overlap only a portion of the sliding member SLM in the thickness direction.

[0157] In the first and second states, the first unattached region UAR can be in close contact with the support member SF, and in the third state, the first unattached region UAR can be spaced apart from the support member SF. In the second state, the curved portion DP_CV can overlap with the support member SF in the thickness direction, and the portion of the first unattached region UAR located at the end of the support member SF facing the hinge member HG can be slightly spaced apart from the upper surface of the support member SF to form part of the curved portion DP_CV. It should be understood that the embodiments described herein are not limited thereto.

[0158] like Figure 13 As shown, when the display device 1a transitions from the second state to the third state, the first unattached area UAR can be spaced apart from the support member SF. Specifically, when the display device 1a transitions from the second state to the third state, the sliding member SLM can move in a direction away from the first rotation axis RX1, the second rotation axis RX2, and / or the hinge member HG including the first rotation axis RX1 and the second rotation axis RX2, and the portion of the display panel DP attached to the sliding member SLM can be pulled by the sliding member SLM. The portion of the display panel DP located in the first unattached area UAR can be bent and spaced apart from the support member SF. As the sliding member SLM moves away from the hinge member HG, the first unattached area UAR can gradually space apart from the portion provided on the end of the support member SF facing the hinge member HG.

[0159] When the display device 1a transitions from the second state to the third state, the changes in the size of the curved portion DP_CV, the changes in the curvature of the curved portion DP_CV, and the changes in the radius of curvature can be substantially equal to... Figures 6 to 8 The exemplary embodiment shows the changes in the size of the curved portion DP_CV, the changes in the curvature of the curved portion DP_CV, and the changes in the radius of curvature.

[0160] Further reference Figure 14The display device 1a can transition from a third state to a second state. In doing so, the portion of the display panel DP located in the second non-folded region NFA2 can be attached to the sliding member SLM and can slide together with the sliding member SLM. A portion of the display panel DP can be pushed toward the hinge member HG, the first rotation axis RX1, and / or the second rotation axis RX2. In this case, the curved portion DP_CV can have a third radius of curvature R3, which is equal to or greater than the first radius of curvature R1 and equal to or less than the second radius of curvature R2. During the transition from the third state to the second state, the size of the third radius of curvature R3 gradually decreases, such that the radius of curvature of the curved portion DP_CV can gradually change from the second radius of curvature R2 to the first radius of curvature R1.

[0161] A portion of the display panel DP can be attached to a rigid sliding member SLM and can move together with the sliding member SLM. Therefore, when the display device 1a transitions from one state to another, the curvature and radius of curvature of the bent portion DP_CV can change naturally. Furthermore, buckling of the display panel DP, which may occur when the display panel DP is pushed towards the hinge member HG, the first rotation axis RX1, and / or the second rotation axis RX2 without the sliding member SLM, can be prevented.

[0162] The display panel DP may further include a second unattached region UAR_S. The second unattached region UAR_S may be located within the second non-folded region NFA2. The second unattached region UAR_S may refer to the portion of the display panel DP disposed on the upper surface of the sliding member SLM but not attached to the sliding member SLM. In some embodiments, when the second rigid member RG2 is positioned between the display panel DP and the sliding member SLM, the second unattached region UAR_S may refer to the portion of the display panel DP disposed on the upper surface of the second rigid member RG2 but not attached to the second rigid member RG2. The size (e.g., area or length in a first direction in a cross-section) of the second unattached region UAR_S may be less than or equal to the size of the first unattached region UAR, but the embodiments described herein are not limited thereto.

[0163] Reference Figures 11 to 13In the first and third states, the second unattached region UAR_S can contact the upper surface of the sliding member SLM, but in the second state, the second unattached region UAR_S can be spaced apart from the sliding member SLM. The second unattached region UAR_S can at least partially overlap with the first unattached region UAR in the thickness direction in the second state, and can not overlap with the first unattached region UAR in the thickness direction in both the first and third states. It should be understood that this disclosure is not limited thereto. With the first unattached region UAR and the second unattached region UAR_S, a natural curvature change of the curved portion DP_CV is possible when the display device 1a transitions from one state to another, and the stress applied to the display panel DP can be alleviated.

[0164] Although some embodiments and implementations have been described herein, other embodiments and modifications will be apparent from this description. Therefore, the inventive concept is not limited to such embodiments, but is limited to the broader scope of the appended claims and various obvious modifications and equivalent arrangements as will be apparent to those skilled in the art.

Claims

1. A display device, wherein, The display device includes: A display panel includes a first surface for displaying an image and a second surface opposite to the first surface, the display panel being folded about at least one axis of rotation to have a curvature such that the first surface is not exposed to the outside of the display device; A first base component, a second base component, and a third base component are disposed on the second surface of the display panel; and A sliding member is disposed on the second surface of the display panel and located between the second base member and the second surface of the display panel. The sliding member is configured to slide a portion of the display panel to change the curvature of the display panel, and is configured to move the portion of the display panel when the display panel is folded, such that a portion of the first surface of the display panel is exposed to the outside of the display device. The sliding member is slidable along the radial direction of the at least one rotation axis and is slidable relative to the second base member.

2. The display device according to claim 1, wherein, The radial direction of the at least one rotation axis includes a first direction toward the edge of the display panel and a second direction opposite to the first direction; and / or The sliding member is disposed between the second base member and the display panel and between the third base member and the display panel, and connects the second base member and the third base member, such that the distance between the second base member and the third base member can be varied in the radial direction.

3. The display device according to claim 2, wherein, When the sliding member moves along the first direction, the area of ​​the first surface of the display panel exposed to the outside of the display device increases, and When the sliding member moves along the second direction, the area of ​​the first surface of the display panel exposed to the outside of the display device decreases.

4. The display device according to claim 2, wherein, When the sliding member moves along the first direction, the curvature of the display panel decreases, and When the sliding member moves along the second direction, the curvature of the display panel increases.

5. The display device according to claim 2, wherein, The display panel includes a curved portion, and when the display panel is folded, the curvature is formed at the curved portion, and Wherein, when the sliding member moves along the first direction, the size of the bent portion increases, and When the sliding member moves along the second direction, the size of the bent portion decreases.

6. The display device according to claim 1, wherein, The display device further includes: A plate component is disposed on the second surface of the display panel, and One side of the plate member is rotatably connected to the sliding member.

7. The display device according to claim 6, wherein, When the sliding member slides, the plate member rotates in the thickness direction of the display panel, causing the curvature of the display panel to change.

8. The display device according to claim 7, wherein, When the sliding member moves in a direction that increases the area of ​​the first surface of the display panel exposed to the outside of the display device, the plate member rotates in a direction that decreases the curvature of the display panel.

9. The display device according to claim 7 or 8, wherein, When the sliding member moves in a direction that reduces the area of ​​the first surface of the display panel exposed to the outside of the display device, the plate member rotates in the direction that increases the curvature of the display panel.

10. The display device according to claim 6, wherein, The display device further includes: A guide groove extends at an inclination in the direction of movement of the sliding member and is configured to guide the rotation of the plate member.

11. The display device according to claim 10, wherein, The plate member includes a protrusion disposed on an opposite side of the plate member and inserted into the guide groove.

12. The display device according to claim 1, wherein, The display device further includes: A support member is disposed on the second surface of the display panel to be spaced apart from the sliding member, and faces the sliding member when the display panel is folded.

13. The display device according to claim 12, wherein, The display panel includes an unattached area that overlaps with the support member in the thickness direction but is not attached to the support member.

14. The display device according to claim 13, wherein, When the display panel is folded, the unattached area comes into close contact with the support member.

15. The display device according to claim 13, wherein, When the sliding member moves, the unattached area is separated from the supporting member and bends, thereby reducing the curvature of the display panel.

16. The display device according to claim 15, wherein, The display device further includes: A hinge component is disposed on the second surface of the display panel. The sliding member is slidable, so that the distance between the sliding member and the hinge member is changeable.

17. The display device according to claim 16, wherein, The curvature of the display panel decreases when the sliding member moves away from the hinge member, and the curvature of the display panel increases when the sliding member moves toward the hinge member.

18. The display device according to any one of claims 1 to 8, 10 to 17, wherein, The sliding member includes an inclined surface that extends inclined in the direction of movement of the sliding member.

19. The display device according to any one of claims 1, 6, 12 and 13, in, The display device is configured to transition between a first state, a second state, and a third state. In the first state, the display panel is unfolded flat. In the second state, the display device is folded so that the first surface of the display panel is not exposed to the outside of the display device. In the third state, a portion of the display panel slides from the second state relative to another portion of the display panel, such that only a portion of the first surface of the display panel is exposed to the outside of the display device. The display panel has a first curvature in the second state and a second curvature smaller than the first curvature in the third state.

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