Display device

Abstract

A display device includes: a display panel including a first area and a second area extending from the first area in a first direction; a first support plate disposed on the bottom of the display panel in the first area; a second support plate disposed on the bottom of the display panel in the second area; and a plurality of holes formed in the second support plate and extending substantially perpendicular to the first direction.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the priority of Korean Patent Application No. 10-2023-0071118 filed in the Korean Intellectual Property Office on June 1, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates generally to display devices, and more particularly to a display device including a flexible display panel and a support plate. Background Art

[0004] Typically, an electronic device that provides an image to a user includes a display device for displaying the image. The display device can generate an image and provide the image to the user through a display screen. The display device can be, for example, a smart phone, a digital camera, a notebook computer, a navigation device, or a smart TV.

[0005] Various types of display devices have been developed. For example, foldable or rollable display devices have been developed. These display devices can be easily and conveniently carried by users. Utility Model Content

[0006] Embodiments provide a display device that facilitates sliding of a display panel while having improved surface grade and durability.

[0007] According to aspects of the present disclosure, a display device is provided, including: a display panel including a first area and a second area extending from the first area in a first direction; a first supporting plate disposed on the bottom of the display panel in the first area; a second supporting plate disposed on the bottom of the display panel in the second area; and a plurality of holes formed in the second supporting plate and extending substantially perpendicular to the first direction.

[0008] The shape of each of the plurality of holes may be any one of a circular shape, an elliptical shape, and a polygonal shape.

[0009] Each of the plurality of holes may have a diameter of at least about 20 μm.

[0010] A distance between adjacent holes in the plurality of holes may be at least about 0.3 μm.

[0011] The thickness of the second support plate may be about 200 to 300 μm.

[0012] The second support plate may include a metal material including at least one of titanium and aluminum.

[0013] The second support plate may also include a finishing member.

[0014] The modulus of the second support plate may be about 0.20 to 0.40 GPa.

[0015] The plurality of holes may include: a plurality of first holes formed at a side surface of the second support plate at an inner side relative to a neutral plane of the second support plate; and a plurality of second holes formed at a side surface of the second support plate at an outer side relative to the neutral plane.

[0016] The display device may further include: a plurality of support bars provided on a bottom of the second support plate; and a rotating member formed in an uneven structure to engage with the plurality of support bars.

[0017] The display device may further include: a first adhesive layer disposed on the rear surface of the display panel, the first adhesive layer overlapping the first region and the second region; a protective film disposed on the rear surface of the first adhesive layer, the protective film overlapping the first region and the second region; a second adhesive layer disposed on the rear surface of the protective film, the second adhesive layer overlapping the first region; a third adhesive layer disposed on the rear surface of the protective film, the third adhesive layer overlapping the second region; a barrier layer disposed on the rear surface of the third adhesive layer, the barrier layer overlapping the second region; and a fourth adhesive layer disposed on the rear surface of the barrier layer, the fourth adhesive layer overlapping the second region. The first support plate may be disposed on the rear surface of the second adhesive layer, and the second support plate may be disposed on the rear surface of the fourth adhesive layer.

[0018] According to another aspect of the present disclosure, a display device operating in a first display mode in which a display area is shrunk and in a second display mode in which the display area is expanded is provided, the display device comprising: a display panel comprising a first area and a second area extending from the first area; a first supporting plate disposed on the bottom of the display panel, the first supporting plate overlapping the first area; a second supporting plate disposed on the bottom of the display panel, the second supporting plate overlapping the second area; and a plurality of holes formed at a side surface of the second supporting plate.

[0019] An area of ​​the second region exposed to the outside in the second display mode may be larger than an area of ​​the second region exposed to the outside in the first display mode.

[0020] The shape of each of the plurality of holes may be any one of a circular shape, an elliptical shape, and a polygonal shape, and the modulus of the second support plate may be about 0.20 to 0.40 GPa.

[0021] The plurality of holes may include: a plurality of first holes formed at a side surface of the second support plate at an inner side relative to a neutral plane of the second support plate; and a plurality of second holes formed at a side surface of the second support plate at an outer side relative to the neutral plane.

[0022] When the display mode of the display device is changed from the first display mode to the second display mode, at least some of the plurality of first holes may be contracted, and at least some of the plurality of second holes may be expanded.

[0023] At least some of the plurality of first holes and at least some of the plurality of second holes may correspond to a curved region of the second support plate.

[0024] The display device may further include: a plurality of support rods disposed on the bottom of the second support plate; and the rotating member may include a structure engaged with the plurality of support rods.

[0025] According to another aspect of the present disclosure, a display device is provided, including: a display panel, including a non-sliding area and a sliding area extending from the non-sliding area; a second supporting plate, including at least three plates joined together in a stacked manner and arranged on the bottom of the display panel, the second supporting plate overlapping the sliding area and including a flat shape portion and a curved shape portion; and a plurality of holes formed at a side surface of the second supporting plate, wherein the plurality of holes are arranged in at least two rows.

[0026] The display device may further include: a first supporting plate disposed on the bottom of the display panel, the first supporting plate overlapping the non-sliding area. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a perspective view of a display device in a first display mode according to an embodiment of the present disclosure.

[0028] Figure 2 is a perspective view of a display device in a second display mode according to an embodiment of the present disclosure.

[0029] Figure 3 It is along Figure 1 A cross-sectional view of the display device taken along line II′ shown in FIG.

[0030] Figure 4 It is along Figure 2 2 is a cross-sectional view of the display device taken along line II-II′ shown in FIG.

[0031] Figure 5 and Figure 6 2 is a view showing a second support plate and a plurality of holes according to an embodiment of the present disclosure.

[0032] Figure 7 2 is a view illustrating a method of manufacturing a second support plate having a plurality of holes formed therein according to an embodiment of the present disclosure.

[0033] Figure 8 is a view illustrating a method of forming a hole in a second support plate according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0034] Exemplary embodiments will now be described more fully below with reference to the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed herein, but can be implemented in various forms. On the contrary, embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0035] In the accompanying drawings, dimensions may be exaggerated for clarity of illustration. It will be understood that when an element is referred to as being "between" two elements, it may be the only element between the two elements, or one or more intervening elements may also be present. The same reference numerals always refer to the same elements.

[0036] By referring to the embodiments described in detail herein and the accompanying drawings, the effects and characteristics of the present disclosure and the methods for achieving the effects and characteristics will be clear. The embodiments are provided only by way of example so that those of ordinary skill in the art can fully understand the features and the scope thereof in the present disclosure. Therefore, the present disclosure can be limited by the scope of the appended claims.

[0037] The terms used herein are used to describe the purpose of aspects of the present disclosure and should not be construed as limiting the concept of the present utility model. As used herein, the singular form is intended to also include the plural form, unless the context clearly indicates otherwise. When used in this specification, the term "comprises / includes" and / or "comprising / including" specifies the presence of the components, steps, operations and / or elements mentioned, but does not exclude the presence or addition of one or more other components, steps, operations and / or elements.

[0038] When any element is described as being “connected,” “coupled” or “accessed” to another element, it should be understood that yet another element may be “connected,” “coupled” or “accessed” between the two elements as well as it is possible for the two elements to be directly “connected,” “coupled” or “accessed” to each other.

[0039] The term “on” may be used to designate that an element or layer is on another element or layer, including both the case where the element or layer is directly on another element or layer and the case where the element or layer is on another element or layer via yet another element or layer.

[0040] It will be understood that although the terms "first", "second", etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. Therefore, without departing from the teachings of the present disclosure, the "first" element discussed herein may also be referred to as the "second" element.

[0041] Figure 1is a perspective view of a display device DD in a first display mode according to an embodiment of the present disclosure. Figure 2 is a perspective view of a display device DD in a second display mode according to an embodiment of the present disclosure.

[0042] refer to Figure 1 and Figure 2 , the display device DD can operate in different display modes. The first display mode means a mode for displaying an image in a state where the display area DA of the display panel DP is relatively short. For example, the first display mode may mean a mode for displaying an image in a state where the display area DA of the display panel DP is not expanded. The second display mode means a mode for displaying an image in a state where the display area DA of the display panel DP is relatively long. For example, the second display mode may mean a mode for displaying an image in a state where the display area DA of the display panel DP is expanded. The area of ​​the display area DA may be larger in the second display mode than in the first display mode. For example, the area of ​​the display area DA that can be observed by the user may be larger in the second display mode than in the first display mode.

[0043] The display device DD may include a display panel DP and a housing CA. The display panel DP may be a component that displays an image. The housing CA may be a component that accommodates the display panel DP. For example, the housing CA may partially accommodate the display panel DP and expose a portion of the display panel DP to the outside.

[0044] The display panel DP may be implemented as a flexible display panel. A flexible display panel refers to a flexible display panel that can be bent, curved and / or curled. The flexible display panel may be bent, curved and / or curled without losing display characteristics. The flexible display panel may have features including brightness, thinness and impact resistance. The flexible display panel may include a substrate made of a flexible material. For example, the flexible display panel may include a substrate formed of a polymer substance such as polyimide or polyethylene terephthalate as a flexible material.

[0045] The display panel DP may include a light-emitting display panel. For example, the light-emitting display panel may be an organic light-emitting display panel, an inorganic light-emitting display panel, an organic-inorganic light-emitting display panel, a quantum dot display panel, a micro LED display panel, or a nano LED display panel.

[0046] The display panel DP may display an image in the display area DA. Pixels for displaying an image may be disposed in the display area DA. For example, a plurality of pixels may generate light forming an image.

[0047] The area of ​​the display area DA exposed to the outside can expand as the shell CA extends. For example, when the display mode of the display device DD changes from the first display mode to the second display mode, the area of ​​the display area DA exposed to the outside can increase. When the area of ​​the display area DA exposed to the outside increases, the user can view the image through the wider display area DA. For example, when the display mode of the display device DD changes from the second display mode to the first display mode, the area of ​​the display area DA can decrease as the shell CA shrinks. Therefore, the area of ​​the display area DA exposed to the outside can be controlled according to the state of the shell CA. For example, the shell CA can have an extended state or a shrunk state, but is not limited to this, and the shell CA can have an intermediate state.

[0048] The housing CA may have at least a portion of the display panel DP installed therein. For example, the housing CA may have the display panel DP installed thereto so that the display area DA of the display panel DP is an area exposed to the outside. The housing CA may have the display panel DP installed therein in various ways. For example, the housing CA may have the display panel DP installed therein in a manner such as rolling in, sliding in, bringing in, or folding in.

[0049] The housing CA may include a plurality of parts that can move relative to each other. For example, the housing CA may include a first part and a second part, and when the housing CA is retracted, the first part and the second part may move so that the length of the housing CA can be reduced and the area of ​​the display area DA exposed to the outside can be reduced. When the housing CA is extended, the first part and the second part may move so that the length of the housing CA can be increased and the area of ​​the display area DA exposed to the outside can be increased.

[0050] Figure 3 It is along Figure 1 0 is a cross-sectional view of the display device DD taken along line II′ shown in FIG. Figure 4 It is along Figure 2 0 is a cross-sectional view of the display device DD taken along line II-II′ shown in FIG.

[0051] refer to Figure 3 and Figure 4 The display device DD may include a display panel DP, a first adhesive layer AL1, a protective film PF, a second adhesive layer AL2, a first support plate SP1, a third adhesive layer AL3, a barrier layer BL, a fourth adhesive layer AL4, a second support plate SP2, a plurality of support bars MB and a rotating member RM.

[0052] The display panel DP may be disposed at a position overlapping the first area A1 and the second area A2. The display panel DP may display an image in a display area DA including at least a portion of the second area A2 and the first area A1. At least a portion of the second area A2 and the first area A1 may correspond to a display surface of the display panel DP exposed to the outside.

[0053] The first area A1 may be a non-sliding area overlapping the first support plate SP1. The first area A1 exposed to the outside may have the same area in the first display mode and the second display mode.

[0054] The second area A2 may include a non-sliding area and a sliding area. The second area A2 may extend from the first area A1 and may overlap with the second support plate SP2. The second area A2 may extend from the first area A1 at the front portion of the housing CA to the rear portion of the housing CA. The front portion of the housing CA may include one side of the display area DA, and the rear portion of the housing CA may include a side opposite to the display area DA. The portion of the second area A2 that forms the display area DA may be included in the non-sliding area. The second area A2 may not include a non-sliding area, for example, when the housing CA is in a sleeved state or when the second area A2 and the display area DA do not overlap. The portion of the second area A2 exposed to the outside may have different areas in the first display mode and the second display mode. For example, as the portion of the second support plate SP2 at the rear portion of the housing CA slides in the first direction DR1 and is exposed at the front portion of the housing CA, the area of ​​the second area A2 exposed to the outside in the second display mode may increase. The area of ​​the second area A2 exposed to the outside in the second display mode may be greater than the area of ​​the second area A2 exposed to the outside in the first display mode. The area of ​​the display area DA may vary according to the area of ​​the second area A2 exposed to the outside.

[0055] The first adhesive layer AL1 may be disposed at a position overlapping the first area A1 and the second area A2. The first adhesive layer AL1 may be disposed on the rear surface of the display panel DP. An optically clear adhesive (OCA) or a pressure sensitive adhesive (PSA) may be disposed between the first adhesive layer AL1 and the display panel DP. For example, the first adhesive layer AL1 may include an adhesive member such as an optically clear adhesive (OCA) or a pressure sensitive adhesive (PSA).

[0056] The protective film PF may be disposed at a position overlapping the first area A1 and the second area A2. The protective film PF may be disposed on the rear surface of the first adhesive layer AL1. The protective film PF may protect the display panel DP. The protective film PF may enable the display panel DP to bend. The protective film PF may include a plastic material having flexibility. For example, the protective film PF may include polyimide (PI) or polyethylene terephthalate (PET).

[0057] The second adhesive layer AL2 may be disposed at a position overlapping with the first area A1. The second adhesive layer AL2 may be disposed between the first support plate SP1 and the protective film PF overlapping with the first area A1. The second adhesive layer AL2 may be disposed on the rear surface of the protective film PF overlapping with the first area A1. The second adhesive layer AL2 may include an adhesive member such as an optically clear adhesive (OCA) or a pressure sensitive adhesive (PSA).

[0058] The first support plate SP1 may be disposed at a position overlapping the first area A1. The first support plate SP1 may be disposed on the rear surface of the second adhesive layer AL2 overlapping the first area A1. The first support plate SP1 may have a flat shape. The first support plate SP1 and the second support plate SP2 may be independently movable along the sliding direction. For example, when the portion of the second support plate SP2 at the rear portion of the housing CA slides in the first direction DR1 (for example, when the display mode of the display device DD changes from the first display mode to the second display mode), the first support plate SP1 may move in the opposite direction of the first direction DR1. For example, the first support plate SP1 and the second support plate SP2 may move to be relatively separated, and the housing CA may extend. On the contrary, when the portion of the second support plate SP2 at the rear portion of the housing CA slides in the opposite direction of the first direction DR1 (for example, when the display mode of the display device DD changes from the second display mode to the first display mode), the first support plate SP1 may move in the first direction DR1. For example, the first support plate SP1 and the second support plate SP2 may move to be relatively close, and the housing CA may shrink. The movement range of the first support plate SP1 may vary according to the sliding distance of the second support plate SP2.

[0059] The third adhesive layer AL3 may be disposed at a position overlapping at least a portion of the second area A2. The third adhesive layer AL3 may be disposed on a rear surface of the protective film PF overlapping at least a portion of the second area A2. The third adhesive layer AL3 may be spaced apart from the second adhesive layer AL2 by a predetermined distance. For example, the third adhesive layer AL3 and the second adhesive layer AL2 may be disposed separately from each other. The third adhesive layer AL3 may include an adhesive member such as an optically clear adhesive (OCA) or a pressure sensitive adhesive (PSA).

[0060] The barrier layer BL may be disposed at a position overlapping with at least a portion of the second area A2. The barrier layer BL may be disposed at a rear surface of the third adhesive layer AL3 overlapping with at least a portion of the second area A2. The barrier layer BL may be disposed between the third adhesive layer AL3 and the fourth adhesive layer AL4. The barrier layer BL may be spaced apart from the first support plate SP1 by a predetermined distance. The barrier layer BL may protect the second support plate SP2. The barrier layer BL may enable the second support plate SP2 to slide. The barrier layer BL may include polyimide (PI) or polyethylene terephthalate (PET).

[0061] The fourth adhesive layer AL4 may be disposed at a position overlapping at least a portion of the second area A2. The fourth adhesive layer AL4 may be disposed on the rear surface of the barrier layer BL overlapping at least a portion of the second area A2. The fourth adhesive layer AL4 may be spaced apart from the first support plate SP1 by a predetermined distance. The fourth adhesive layer AL4 may include an adhesive member such as an optically clear adhesive (OCA) or a pressure sensitive adhesive (PSA).

[0062] The second support plate SP2 may be disposed at a position overlapping with the second area A2. The second support plate SP2 may be disposed on the rear surface of the fourth adhesive layer AL4. The second support plate SP2 may have a flat shape portion and a curved shape portion. The curved shape portion may be formed as the flat shape portion bends when the second support plate SP2 slides. The curved shape portion may be disposed between an exposed flat shape portion at the front portion of the housing CA and a hidden flat shape portion at the rear portion of the housing CA. In an example, as the housing CA shrinks, the hidden flat shape portion may slide relative to the exposed flat shape portion in a direction opposite to the first direction DR1, and the area of ​​the exposed flat shape portion may decrease. In another example, as the housing CA expands, the hidden flat shape portion may slide relative to the exposed flat shape portion in the first direction DR1, and the area of ​​the exposed flat shape portion may increase.

[0063] When the display mode of the display device DD is changed from the first display mode to the second display mode, the hidden flat shape portion of the second support plate SP2 at the rear portion of the housing CA may slide in the first direction DR1. Conversely, when the display mode of the display device DD is changed from the second display mode to the first display mode, the hidden flat shape portion of the second support plate SP2 at the rear portion of the housing CA may slide in the opposite direction of the first direction DR1. As described herein, the area of ​​the second area A2 exposed to the outside may be controlled according to the direction in which the second support plate SP2 slides and the degree to which the second support plate SP2 slides relative to the first support plate SP1.

[0064] A plurality of support rods MB may be disposed on the bottom of the second support plate SP2. For example, the plurality of support rods MB may be attached to the bottom of the second support plate SP2 by a heat compression bonding process. There is no particular limitation on the number of the plurality of support rods MB and the distance between adjacent support rods of the plurality of support rods MB. The distance between adjacent support rods of the plurality of support rods MB may be set by taking into account the rotating member RM, the sliding of the second support plate SP2, and the like. The plurality of support rods MB may be engaged with the rotating member RM, and therefore, the portion of the second support plate SP2 at the rear portion of the shell CA may slide in the first direction DR1 or in the opposite direction.

[0065] The rotating member RM may be disposed at the inner side of the second support plate SP2. For example, the rotating member RM may be disposed at the inner side of the curved shape portion of the second support plate SP2. The rotating member RM may include a structure that may engage with a plurality of support rods MB. In an example, the structure of the rotating member RM may include a plurality of cooperative rods that may engage with at least some of the plurality of support rods MB. As the rotating member RM rotates while the structure engages with the plurality of support rods MB, the second support plate SP2 may slide.

[0066] The second support plate SP2 may be made of a material having high rigidity. The second support plate SP2 may be made of a material supporting a stacked structure including the display panel DP. For example, the second support plate SP2 may be made of a metal material including at least one of titanium and aluminum. For example, the material of the second support plate SP2 may be titanium, aluminum, or a titanium-aluminum alloy.

[0067] The second support plate SP2 made of a metal material may have a high modulus (e.g., about 180 to 190 GPa). The second support plate SP2 made of a metal material may be formed to have a reduced modulus (e.g., less than about 180 to 190 GPa) so that the second support plate SP2 can slide and bend around the rotating member RM.

[0068] In an example, holes may be formed in the second support plate SP2, thereby reducing the modulus of the second support plate SP2. For example, holes having a grid structure may be formed at the top surface of the second support plate SP2, thereby reducing the modulus of the second support plate SP2. The modulus of the second support plate SP2 may be reduced (e.g., to about 0.30 to 0.40 GPa) due to the holes having a grid structure that may be formed at the top surface of the second support plate SP2.

[0069] The display device DD according to an embodiment of the present disclosure may include a plurality of holes HO (see Figure 3 and Figure 4). In an example, the plurality of holes HO extend substantially perpendicular to the first direction DR1. In an example, the plurality of holes HO extend in the second direction DR2. Since the plurality of holes HO are formed at the side surface, external visibility of the holes may be low, and the surface grade of the display device DD may be improved.

[0070] In an example where a plurality of holes HO are formed at the side surface of the second support plate SP2, the modulus of the second support plate SP2 can be reduced. In an embodiment, the modulus of the second support plate SP2 can be about 0.20 to 0.40 GPa. In an example where the second support plate SP2 has a modulus of about 0.20 to 0.40 GPa, the second support plate SP2 can slide and move around the rotating member RM. In addition, the impact resistance of the second support plate SP2 can be ensured. In an example where the second support plate SP2 has a modulus of about 0.20 to 0.40 GPa, the second support plate SP2 can be prevented from sagging or deforming during its sliding.

[0071] Figure 5 and Figure 6 2 is a view showing a second support plate SP2 and a plurality of holes HO according to an embodiment of the present disclosure.

[0072] refer to Figure 5 In an embodiment, the thickness TH of the second support plate SP2 may be about 200 to 300 micrometers (μm). The second support plate SP2 having a thickness TH of about 200 to 300 μm may stably support a stacked structure including the display panel DP. In addition, sufficient space for forming a plurality of holes HO at the side surface of the second support plate SP2 may be ensured.

[0073] In an embodiment, the shape of each of the plurality of holes HO may be any one of a circular shape, an elliptical shape, and a polygonal shape. For example, the shape of each of the plurality of holes HO may be a hexagonal shape. In addition, when the shape of each of the plurality of holes HO is a hexagonal shape, the plurality of holes HO may be formed into a honeycomb structure. Hereinafter, for ease of description, the case where the shape of each of the plurality of holes HO is a hexagonal shape will be mainly described. However, the embodiments of the present disclosure are not limited thereto. For example, some of the plurality of holes HO may have the same shape, and some of the plurality of holes HO may have different shapes. Each of the plurality of holes HO may have various shapes such as a triangular shape or a quadrilateral shape.

[0074] In an embodiment, a diameter DI of each of the plurality of holes HO may be at least about 20 μm. In an embodiment, a distance IN between the plurality of holes HO may be at least about 0.3 μm. Therefore, the modulus and impact resistance of the second support plate SP2 may enable the second support plate SP2 to slide (the sliding is caused by the rotating member RM and the plurality of support bars MB), and the sliding may be performed stably and easily. For example, the sliding of the second support plate SP2 may include moving a portion of the second support plate SP2 around the rotating member RM.

[0075] refer to Figure 6 , the second support plate SP2 may include an inner portion SP2_IS and an outer portion SP2_OS which may be divided relative to the neutral plane NP.

[0076] The neutral plane NP may be a region that maintains the original shape without shrinking or expanding when the second support plate SP2 slides. For example, the neutral plane NP may be a region that maintains the original shape without shrinking or expanding when the second support plate SP2 slides and a portion of the second support plate SP2 moves around the rotating member RM.

[0077] The inner side portion SP2_IS of the second support plate SP2 may be an area that may shrink when the second support plate SP2 slides from the flat shape portion to the curved shape portion around the rotating member RM. When the second support plate SP2 slides from the flat shape portion to the curved shape portion around the rotating member RM, the inner side portion SP2_IS of the second support plate SP2 may shrink, and a phenomenon (or buckling) that the second support plate SP2 may be buckled may be reduced or prevented.

[0078] The outer side portion SP2_OS of the second support plate SP2 may be an area that may expand when the second support plate SP2 slides from the flat shape portion to the curved shape portion around the rotating member RM. When the second support plate SP2 slides from the flat shape portion to the curved shape portion around the rotating member RM, the outer side portion SP2_OS of the second support plate SP2 may expand, and a phenomenon (or tearing) that the second support plate SP2 may be torn may be reduced or prevented.

[0079] The plurality of holes HO may include a plurality of first holes HO1 and a plurality of second holes HO2. The plurality of first holes HO1 may be formed at a side surface of an inner side portion SP2_IS of the second support plate SP2. The plurality of second holes HO2 may be formed at a side surface of an outer side portion SP2_OS of the second support plate SP2.

[0080] In an embodiment, while the display mode of the display device DD is changed from the first display mode to the second display mode or from the second display mode to the first display mode, at least some of the plurality of first holes HO1 may shrink, and at least some of the plurality of second holes HO2 may expand. For example, when the second support plate SP2 slides, the first hole HO1 corresponding to the curved area BA of the second support plate SP2 among the plurality of first holes HO1 may shrink, and the size of the first hole HO1 may decrease. In addition, when the second support plate SP2 slides, the second hole HO2 corresponding to the curved area BA of the second support plate SP2 among the plurality of second holes HO2 may expand, and the size of the second hole HO2 may increase. As a result, the residual stress in the second support plate SP2 may be dispersed, and fatigue phenomenon may be reduced or prevented. For example, fatigue phenomenon may include the second support plate SP2 breaking due to accumulated wear during repeated sliding.

[0081] Figure 7 2 is a view showing a method of manufacturing the second support plate SP2 according to an embodiment of the present disclosure. In an example of the method of manufacturing the second support plate SP2, a plurality of holes HO may be formed.

[0082] refer to Figure 7 , the first plate P1 may be made to pass through the corrugating roller CR, thereby machining the first plate P1 into a second plate P2 having a semi-hexagonal shape. A plurality of second plates P2 may be attached to each other. For example, a plurality of second plates P2 may be attached to each other in a stacked manner by thermocompression bonding, thereby machining the plurality of second plates P2 into a third plate P3 having a plurality of holes HO formed therein. The plurality of holes HO may be arranged in at least two rows stacked in the third direction DR3.

[0083] The plurality of holes HO may extend substantially perpendicular to the first direction DR1. The plurality of holes HO may extend completely across the third plate P3 and may be visible at the side surface of the third plate P3. In an example, a hole in the plurality of holes HO may include a plurality of discontinuous portions extending in a line substantially perpendicular to the first direction DR1. In an example, the plurality of holes HO may extend across a portion of the third plate P3, and the plurality of holes HO may not be visible at the side surface of the third plate P3.

[0084] exist Figure 7 , three second plates P2 are shown attached to each other. However, the present disclosure is not limited thereto, and the number of second plates P2 to be attached may be increased according to the number of holes HO to be formed. A finishing member FM may be attached to the top and bottom of the third plate P3, thereby manufacturing a second support plate SP2 in which a plurality of holes HO are formed. For example, the finishing member FM may include a film made of a synthetic resin or a substance such as the material constituting the third plate P3.

[0085] Figure 8 is a view illustrating a method of forming the hole HO in the second support plate SP2 according to an embodiment of the present disclosure.

[0086] refer to Figure 8 , holes HO can be formed in the second support plate SP2 by using a laser LA. A laser beam can be irradiated from the laser LA, and heat can be applied to the second support plate SP2, thereby forming the holes HO. In the example, the laser LA can be a femtosecond laser. When the laser LA is used, holes HO having various shapes such as a circular shape, an elliptical shape, or a polygonal shape can be formed. In addition, holes HO having fine sizes can be machined in a constant arrangement. As the distance between the holes HO decreases, the number of holes HO formed in the second support plate SP2 can increase.

[0087] According to the present disclosure, a display device including a sliding display panel may have improved surface grade and durability.

[0088] Exemplary embodiments have been disclosed herein, and although specific terms are used, they are used and interpreted in a general and descriptive sense only, and not for limiting purposes. In some cases, as will be apparent to one of ordinary skill in the art with the filing of this application, unless otherwise specifically indicated, features, characteristics, and / or elements described in conjunction with a particular embodiment may be used alone or in combination with features, characteristics, and / or elements described in conjunction with other embodiments. Therefore, it will be understood by those skilled in the art that various changes may be made in form and detail without departing from the spirit and scope of the present disclosure as set forth in the appended claims.

Claims

1. A display device, characterized in that: include: A display panel comprising a first area and a second area extending from the first area in a first direction; a first support plate disposed on a bottom of the display panel in the first region; a second support plate disposed on the bottom of the display panel in the second region; as well as A plurality of holes are formed in the second support plate and extend perpendicular to the first direction.

2. The display device according to claim 1, characterized in that The shape of each of the plurality of holes is any one of a circular shape, an elliptical shape, and a polygonal shape.

3. The display device according to claim 1, characterized in that Each of the plurality of holes has a diameter of at least 20 microns.

4. The display device according to claim 1, characterized in that A distance between adjacent holes in the plurality of holes is at least 0.3 micrometers.

5. The display device according to claim 1, characterized in that The second support plate has a thickness of 200 to 300 microns.

6. The display device according to claim 1, characterized in that: The material of the second support plate is titanium, aluminum or titanium-aluminum alloy.

7. The display device according to claim 1, characterized in that: The second support plate also includes a finishing member.

8. The display device according to claim 1, characterized in that: The second support plate has a modulus of 0.20 to 0.40 GPa.

9. The display device according to claim 1, characterized in that: The plurality of holes comprises: a plurality of first holes formed at a side surface of the second support plate at an inner side portion relative to a neutral plane of the second support plate; and A plurality of second holes are formed at a side surface of the second support plate at an outer side relative to the neutral plane.

10. The display device according to claim 1, characterized in that: Also includes: A plurality of support rods, disposed on the bottom of the second support plate; as well as The rotating member has a structure engaged with at least some of the plurality of support rods.

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