Display device

Abstract

The invention relates to a display device. A display device according to one embodiment includes: a display panel including a front surface on which a display surface is disposed and a back surface, and including a folding axis extending in a first direction; a first shield member disposed on a rear surface of the display panel and having a modulus of 1 GPa to 300 GPa; a first coupling member disposed on a rear surface of the first shield member; and a metal plate disposed on a rear surface of the first coupling member and including a first plate portion and a second plate portion arranged in a second direction intersecting the first direction, and a connecting portion connecting the first plate portion and the second plate portion, the first coupling member not overlapping the connecting portion.

Description

[0001] This application is a divisional application of the invention patent application with application number 202110521285.3, application date May 13, 2021, and invention name “display device”.

[0002] This application claims priority to Korean Patent Application No. 10-2020-0063087, filed on May 26, 2020, and all rights arising therefrom, the contents of which are incorporated herein by reference in their entirety. Technical Field

[0003] The present invention relates to a display device. Background Art

[0004] The display device is a device that displays images, and includes an organic light emitting display panel having an organic light emitting diode (OLED) element or a quantum dot light emitting device (QD-EL) element, or a display panel such as a liquid crystal display panel.

[0005] On the other hand, mobile electronic devices include display devices in order to provide images to users. Currently, the proportion of mobile electronic devices having a larger display screen while having the same or smaller volume or thickness as before is increasing, and in order to provide a larger screen only when in use, foldable display devices or bendable display devices having a structure that can be folded and unfolded are also being developed.

[0006] In such a display device, a metal plate may be disposed on the back surface of the display panel, and the metal plate may be configured so that at least a portion of the metal plate can be extended and retracted in response to folding of the display panel. Summary of the invention

[0007] In order to facilitate folding of the display device, a connection portion corresponding to the folding area is arranged in the metal plate. However, the grid pattern shape constituting the connection portion may be recognized from the display surface of the display device, thereby reducing the display quality.

[0008] An object of the present invention is to provide a display device that can prevent a connection portion of a metal plate from being recognized.

[0009] Another object of the present invention is to provide a display device having improved impact resistance.

[0010] The subject of the present invention is not limited to the subject mentioned above, and those skilled in the art should be able to understand other technical subjects not mentioned through the following description.

[0011] An embodiment for solving the above-mentioned problem involves a display device including: a display panel including a front surface and a back surface having a display surface, and including a folding axis extending in a first direction; a first shielding component arranged on the back surface of the display panel and having a modulus of 1 GPa to 300 GPa; a first combining component arranged on the back surface of the first shielding component; and a metal plate arranged on the back surface of the first combining component and including a first plate portion and a second plate portion arranged in a second direction intersecting the first direction, and a connecting portion connecting the first plate portion and the second plate portion, wherein the first combining component does not overlap with the connecting portion.

[0012] It may be that the modulus of the first shielding member is 1 GPa to 10 GPa.

[0013] The first shielding member may have a thickness of 25 μm to 80 μm.

[0014] The first shielding member may include at least one selected from the group consisting of polyimide, polyacrylate, polymethyl methacrylate, polycarbonate, polyethylene terephthalate, polyethylene naphthalate, polyether sulfone, polyarylate, and cycloolefin copolymer.

[0015] It may be that the modulus of the first shielding member is 10 GPa to 300 GPa.

[0016] The first shielding member may have a thickness of 10 μm to 50 μm.

[0017] The first shielding member may include at least one selected from stainless steel, invar, aluminum, iron, chromium, carbon, nickel, silicon, manganese and molybdenum.

[0018] The first combining member may include: a first combining portion overlapping the first plate portion; and a second combining portion spaced apart from the first combining portion and overlapping the second plate portion.

[0019] It may be that the first combining portion and the second combining portion are spaced apart from each other by a first spacing interval, and the first spacing interval is equal to or greater than a width of the connecting portion in the second direction.

[0020] The display device may further include: a second bonding member disposed between the display panel and the first shielding member, and a sum of thicknesses of the first bonding member and the second bonding member is greater than 1 μm and less than 80 μm.

[0021] The second bonding member may have a thickness of 1 μm to 50 μm.

[0022] It may be that the display device further includes: a third combining component, arranged on the back side of the metal plate; a second shielding component, arranged on the back side of the third combining component; a fourth combining component, arranged on the back side of the second shielding component; and a heat dissipation component, arranged on the back side of the fourth combining component.

[0023] The second shielding member may overlap with the first plate portion, the second plate portion, and the connecting portion.

[0024] The heat dissipation component may include: a first heat dissipation portion overlapping the first plate portion; and a second heat dissipation portion spaced apart from the first heat dissipation portion and overlapping the second plate portion.

[0025] The second spacing interval between the first heat dissipation portion and the second heat dissipation portion may overlap with the connection portion.

[0026] It may be that the fourth combining component includes: a third combining portion, overlapping with the first plate portion; and a fourth combining portion, separated from the third combining portion and overlapping with the second plate portion, the third combining portion and the fourth combining portion are separated from each other by a second separation interval, and the second separation interval is equal to or greater than the width of the connecting portion.

[0027] It may be that the display device also includes: a fifth combining component, which is arranged on the back side of the heat dissipation component; and a gasket component, which is arranged on the back side of the fifth combining component, and the gasket component includes: a first gasket portion, which overlaps with the first plate portion; and a second gasket portion, which is separated from the first gasket portion and overlaps with the second plate portion, and the first gasket portion and the second gasket portion are separated from each other by a third separation interval, and the third separation interval overlaps with the connecting portion.

[0028] In addition, a display device involved in an embodiment may include: a display panel, including a front surface and a back surface configured with a display surface, and including a folding axis extending in a first direction; a second combining component, configured on the back surface of the display panel; a first shielding component, configured on the back surface of the second combining component; a first combining component, configured on the back surface of the first shielding component; and a metal plate, configured on the back surface of the first combining component, and including a first plate portion and a second plate portion arranged in a second direction intersecting the first direction and a connecting portion connecting the first plate portion and the second plate portion, the sum of the thicknesses of the first combining component and the second combining component being greater than 1 μm and less than 80 μm.

[0029] The second bonding member may have a thickness of 1 μm to 50 μm.

[0030] The first connecting member may not overlap with the connecting portion of the metal plate.

[0031] Details of other embodiments are included in the detailed description and accompanying drawings.

[0032] (Effects of the Invention)

[0033] According to the display device according to each embodiment, the spacer member is arranged on the back surface of the metal plate, so that the impact resistance characteristic can be improved.

[0034] Furthermore, according to the display device according to each embodiment, by providing the first shield member having a large modulus, it is possible to prevent the lattice pattern shape of the connection portion of the metal plate from being recognized.

[0035] In addition, according to the display device according to each embodiment, the thickness of the first bonding member and the second bonding member respectively disposed above and below the first shielding member is formed within a predetermined range, thereby improving the impact resistance characteristics.

[0036] In addition, according to the display device of each embodiment, the first connecting member disposed between the first shielding member and the metal plate does not overlap with the connection portion of the metal plate, thereby preventing the display module from sagging in the region overlapping with the connection portion of the metal plate.

[0037] The effects of each embodiment are not limited to the above examples, and more effects are included in this specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a three-dimensional diagram of a display device according to an embodiment.

[0039] Figure 2 It is folded Figure 1 A three-dimensional diagram of a display device.

[0040] Figure 3 yes Figure 1 An exploded perspective view of a display device.

[0041] Figure 4 It is along Figure 1 A cross-sectional view of the display device taken along line AA'.

[0042] Figure 5 is a cross-sectional view of a display panel.

[0043] Figure 6 It is a cross-sectional view showing a part of a display device according to an embodiment.

[0044] Figure 7 FIG. 1 is a cross-sectional view showing a portion of a display device according to an embodiment in a folded state.

[0045] Figure 8It is a cross-sectional view schematically showing a connection portion between a first connecting member and a metal plate.

[0046] Fig. 9 is a cross-sectional view showing a display device according to another embodiment.

[0047] Fig.10 It is a cross-sectional view showing a part of a display device according to another embodiment.

[0048] Fig.11 is a cross-sectional view showing a display device according to still another embodiment.

[0049] Fig.12 is a cross-sectional view showing a portion of a display device according to still another embodiment.

[0050] Fig.13 It is a cross-sectional view showing a display device sample #1 according to a manufacturing example.

[0051] Fig.14 It is a cross-sectional view showing a display device of display device sample #8 according to a manufacturing example.

[0052] Fig.15 This is a graph showing the height distribution in relation to the distance from the center of the connection portion of the metal plate in each display device sample.

[0053] Explanation of symbols:

[0054] 1: display device; 10: display module; 100: display panel; 200: metal plate; 210: first plate portion; 220: second plate portion; 230: connecting portion; 250: second shielding component; 420: first shielding component; 510: first combining component; 512: first combining portion; 514: second combining portion; 520: second combining component; 530: third combining component; 540: fourth combining component; 542: third combining portion; 544: fourth combining portion; 550: fifth combining component; 600: heat dissipation component; 610: first heat dissipation portion; 620: second heat dissipation portion; 700: gasket component; 710: first gasket portion; 720: second gasket portion. DETAILED DESCRIPTION

[0055] References and Attachments Figure 1 The advantages, features and methods of achieving the advantages and features of the present invention will become clear from the detailed description of the embodiments below. However, the present invention is not limited to the embodiments disclosed below, and can be implemented in various different forms. The embodiments are only provided to make the disclosure of the present invention complete and to fully inform the scope of the invention to those skilled in the art. The present invention should be defined only by the scope of the claims.

[0056] The case where an element or layer is located on other elements or layers includes not only the case where it is directly located on other elements, but also the case where there are other layers or other elements in between. Throughout the specification, the same symbol refers to the same constituent element. The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings used to illustrate the various embodiments are illustrative, and the present invention is not limited to the illustrated cases.

[0057] Although the terms "first", "second", etc. are used to describe each component, each component is certainly not limited to these terms. These terms are only used to distinguish one component from other components. Therefore, within the technical concept of the present invention, the first component mentioned below can certainly be the second component.

[0058] The various features of the various embodiments of the present invention may be partially or wholly combined or coupled with one another, various linkages and drives are technically possible, and the various embodiments may be implemented independently of one another or together in an associated relationship.

[0059] Hereinafter, specific embodiments will be described with reference to the drawings.

[0060] Figure 1 is a three-dimensional diagram of a display device according to an embodiment. Figure 2 It is a perspective view showing a folded state of a display device according to an embodiment.

[0061] The display device 1 involved in one embodiment is described with the case of being applicable to a smart phone as the center, but is not limited to this. For example, in addition to smart phones, the display device 1 involved in each embodiment of this specification can also be applied to a portable phone, a tablet PC, a PDA (Personal Digital Assistant), a PMP (Portable Multimedia Player), a television, a game console, a watch-type electronic device, a head-mounted display, a display screen of a personal computer, a notebook computer, a car navigation system, a car dashboard, a digital camera, a digital video camera, an external advertising board, an electro-optical board, a medical device, an inspection device, and various household appliances such as a refrigerator and a washing machine or an Internet of Things device. Specific embodiments are described below with reference to the accompanying drawings.

[0062] In the following, the first direction X, the second direction Y and the third direction Z are different directions from each other and intersect with each other. The first direction X may be a length direction, the second direction Y may be a width direction, and the third direction Z may be a thickness direction. The third direction Z may include a front surface direction toward the upper side of the figure and a back surface direction toward the lower side of the figure. Thus, one side of the component configured to face the front surface direction may be referred to as the front surface, and the other side of the component configured to face the back surface direction may be referred to as the back surface. However, it should be understood that the directions mentioned are relative directions and are not limited to the examples mentioned.

[0063] Reference Figure 1 and Figure 2 The display device 1 involved in one embodiment may have a rectangular or square shape on a plane. In one embodiment, the display device 1 may be a rectangular shape with each corner being vertical or a rectangular shape with each corner being chamfered when viewed on a plane. The display device 1 may include two short sides arranged in a first direction X and two long sides arranged in a second direction Y when viewed on a plane. However, this is not limited thereto, and the display device 1 may have various shapes.

[0064] The display device 1 may include a front surface and a back surface. The display device 1 may further include at least one side surface between the front surface and the back surface.

[0065] The display device 1 includes at least one display surface DS. In one embodiment, the display surface DS may be the front surface of the display device 1. The display surface DS may be configured to span across the folding area FA and the non-folding areas NFA1 and NFA2 described later. In some embodiments, both the front surface and the back surface of the display device 1 may be the display surface DS. In some embodiments, the plurality of display surfaces DS may be two or more of the front surface, the back surface, and the side surface of the display device 1.

[0066] The display surface DS may include a display area DA and a non-display area NDA.

[0067] The display area DA displays an image or video. When viewed on a plane, the shape of the display area DA may correspond to the shape of the display device 1. For example, when the display device 1 is rectangular when viewed on a plane, the display area DA may also be rectangular.

[0068] The display area DA may be an area including a plurality of pixels and displaying an image. The plurality of pixels may be arranged in row and column directions. The plurality of pixels may be rectangular, rhombus, or square when viewed on a plane, but are not limited thereto. For example, the plurality of pixels may be quadrilaterals other than rectangles, rhombuses, or squares, polygons other than quadrilaterals, circles, or ellipses when viewed on a plane.

[0069] The non-display area NDA may be an area that does not include pixels and does not display an image. The non-display area NDA may be disposed around the display area DA. The non-display area NDA may be configured as follows: Figure 1 The non-display area NDA may be configured to surround the display area DA as shown, but is not limited thereto. In some embodiments, the display area DA may be partially surrounded by the non-display area NDA. In some embodiments, the display area DA may have a rectangular shape, and the non-display area NDA may be configured around the four sides of the display area DA, but is not limited thereto.

[0070] In one embodiment, the display device 1 may be a foldable device. The display device 1 may be folded or unfolded. The "folded" may include "bent". Specifically, the display device 1 may have a portion overlapping another portion, or a portion bent relative to another portion to form an inclination, or the entire display device may be unfolded flatly. In one embodiment, the display device 1 may be folded such that a portion is approximately greater than 0° and less than 180° relative to another portion, or unfolded such that a portion is inclined at approximately 180° relative to another portion.

[0071] The display device 1 can be folded inward and / or outward. The inward folding is folded so that a part of the display surface DS of the display device 1 faces another part of the display surface DS, and the outward folding can be folded so that a part of the display surface DS of the display device 1 does not face another part. The outward folding can be folded so that a part of the opposite side of the display surface DS of the display device 1 faces another part of the opposite side of the display surface DS. In one embodiment, the display device 1 can be folded inward, but is not limited thereto.

[0072] The display device 1 may have a folded state or an unfolded state. The folded state includes a state in which the display device 1 is bent. Specifically, the folded state may be a state in which a part of the display device 1 is bent to form an inclination relative to another part, and the unfolded state may be a state in which a part of the display device 1 and another part are arranged side by side on a plane. Alternatively, the folded state may be a state in which the angle between a part of the display device 1 and another part is greater than about 0° and less than 180° and / or greater than about 180° and less than 360°, and the unfolded state may be a state in which the angle between a part of the display device 1 and another part is about 180°. Here, the part and the other part may be the non-folding areas NFA1 and NFA2 described later, respectively.

[0073] The display device 1 may be divided into a folding area FA and non-folding areas NFA1 and NFA2. The folding area FA is an area that is folded or bent as the display device 1 is folded. The non-folding areas NFA1 and NFA2 are areas that are not folded or bent. The non-folding areas NFA1 and NFA2 may include a first non-folding area NFA1 and a second non-folding area NFA2. In one embodiment, the first non-folding area NFA1 and the second non-folding area NFA2 may be arranged in the second direction Y, and the folding area FA may be configured between the first non-folding area NFA1 and the second non-folding area NFA2. In the present embodiment, a folding area FA and two non-folding areas NFA1 and NFA2 are defined in the display device 1, but it is not limited thereto. In some embodiments, a plurality of folding areas FA and non-folding areas NFA1 and NFA2 may be defined in the display device 1.

[0074] The display device 1 can be folded or unfolded with the folding axis FX as a reference. The folding axis FX can be configured to overlap with the folding area FA in the thickness direction. In one embodiment, the display device 1 can be folded or unfolded with the folding axis FX configured in the first direction X as a reference, but is not limited thereto. The folding axis FX may include at least one rotation axis. That is, the display device 1 can be folded or unfolded to have at least one center of curvature.

[0075] Below, in Figures 3 to 5 A display device 1 according to an embodiment is described in detail.

[0076] Figure 3 yes Figure 1 An exploded perspective view of a display device. Figure 4 It is along Figure 1 A cross-sectional view of the display device taken along line AA'. Figure 5 is a cross-sectional view of a display panel.

[0077] Reference Figures 1 to 5The display module 10 may be disposed on the front surface of the metal plate 200 . The front surface of the display module 10 may form the front surface of the display device 1 .

[0078] The display module 10 has flexibility and may be configured across the first non-folding area NFA1 , the folding area FA, and the second non-folding area NFA2 , and may be folded with the folding axis FX as a reference.

[0079] Reference Figure 4 The display module 10 may include a display panel 100 , a front stacked structure 300 , and a rear stacked structure 400 .

[0080] The display module 10 may include a display panel 100, a front stacked structure 300 stacked in front of the display panel 100, and a rear stacked structure 400 stacked in the rear of the display panel 100. The front may be a direction in which the display panel 100 displays images, and the rear may be the opposite direction of the front.

[0081] The display panel 100 is a panel for displaying a picture or an image. As an example, in addition to self-luminous display panels such as organic light-emitting display panels (OLED), inorganic light-emitting display panels (inorganic EL), quantum dot light-emitting display panels (QED), micro-LED display panels (micro-LED), nano-LED display panels (nano-LED), plasma display panels (PDP), field emission display panels (FED), cathode ray display panels (CRT), etc., it may also include light-receiving display panels such as liquid crystal display panels (LCD) and electrophoretic display panels (EPD). In the following, the display panel 100 is described by taking an organic light-emitting display panel as an example. In the absence of special distinction, the organic light-emitting display panel applicable to the embodiment may be simply referred to as a display panel. However, the embodiment is not limited to the organic light-emitting display panel, and other display panels listed above or known in the technical field may also be applied within the scope of the shared technical concept.

[0082] The display panel 100 may further include a touch component. The touch component is provided as a panel or film independent of the display panel 100, and the touch component may be attached to the display panel 100, but the touch component may also be provided in the form of a touch layer inside the display panel 100. In the following embodiments, the case where the touch component is provided inside the display panel 100 and included in the display panel 100 is illustrated, but it is not limited thereto.

[0083] Reference Figure 4 and Figure 5The display panel 100 may include a substrate SUB, a circuit driving layer DRL on the substrate SUB, a light emitting layer EML on the circuit driving layer DRL, an encapsulation layer ENL on the light emitting layer EML, and a touch layer TSL on the encapsulation layer ENL.

[0084] The substrate SUB may be a flexible substrate including a flexible polymer material such as polyimide. Thus, the display panel 100 may be bent, folded, or curled. In some embodiments, the substrate SUB may include a plurality of sub-substrates that overlap in the thickness direction with a shielding layer sandwiched therebetween. In this case, each sub-substrate may be a flexible substrate.

[0085] A circuit driving layer DRL may be disposed on the substrate SUB. The circuit driving layer DRL may include a circuit for driving the light emitting layer EML of the pixel. The circuit driving layer DRL may include a plurality of thin film transistors.

[0086] The light emitting layer EML may be disposed on the upper portion of the circuit driving layer DRL. The light emitting layer EML may include an organic light emitting layer. The light emitting layer EML may emit light at various brightnesses according to a driving signal transmitted from the circuit driving layer DRL.

[0087] An encapsulation layer ENL may be disposed on the light emitting layer EML. The encapsulation layer ENL may include an inorganic film or a stacked film of an inorganic film and an organic film.

[0088] A touch layer TSL may be configured on the upper portion of the encapsulation layer ENL. The touch layer TSL may be a layer for recognizing a touch input and may perform the function of a touch component. The touch layer TSL may include a plurality of sensing regions and sensing electrodes.

[0089] Refer again Figure 4 , a front stacked structure 300 is disposed in front of the display panel 100. The front stacked structure 300 may include a polarizing component 330, a cover window 320, and a cover window protection layer 310 which are sequentially stacked from the display panel 100 toward the front.

[0090] The polarizing component 330 polarizes the light passing through. The polarizing component 330 can play a role in reducing the reflection of external light. In one embodiment, the polarizing component 330 can be a polarizing film. The polarizing film can include a polarizing layer and a protective substrate sandwiching the polarizing layer at the upper and lower parts. The polarizing layer can include a polyvinyl alcohol film. The polarizing layer can extend in one direction. The extending direction of the polarizing layer can be the absorption axis, and the direction perpendicular to it can be the transmission axis. The protective substrate can be respectively arranged on one side and the other side of the polarizing layer. The protective substrate can be formed of a cellulose resin such as triacetyl cellulose, a polyester resin, etc., but is not limited to this.

[0091] A cover window 320 may be disposed in front of the polarization component 330. The cover window 320 serves to protect the display panel 100. The cover window 320 may be formed of a transparent material, such as glass or plastic.

[0092] In the case where the cover window 320 includes glass, the glass may be an ultra-thin film (Ultra Thin Glass, UTG) to a thin film glass. In the case where the glass is formed of an ultra-thin film or a thin film, it may have flexible properties and may be bent, curved, folded, and curled. The thickness of the glass may, for example, be in the range of 10 μm to 300 μm, and specifically may be applicable to glass with a thickness of 30 μm to 80 μm or a thickness of about 50 μm. The glass of the cover window 320 may include soda-lime glass, alkali aluminosilicate glass, borosilicate glass, or lithium aluminosilicate glass. The glass of the cover window 320 may include chemically strengthened or thermally strengthened glass in order to have high strength. Chemical strengthening may be formed by an ion exchange treatment process in an alkali salt. The ion exchange treatment process may also be performed more than twice.

[0093] In the case where the cover window 320 includes plastic, it may be more advantageous to exhibit flexible characteristics such as folding. Examples of plastic applicable to the cover window 320 include polyimide, polyacrylate, polymethylmethacrylate (PMMA), polycarbonate (PC), polyethylenenaphthalate (PEN), polyvinylidene chloride, polyvinylidene difluoride (PVDF), polystyrene, ethylene vinylalcohol copolymer, polyethersulfone (PES), polyetherimide (PEI), polyphenylenesulfide (PPS), polyarylate, triacetyl cellulose (TAC), cellulose acetate propionate (CAP), etc., but are not limited thereto. The plastic cover window 320 may be formed of one or more of the plastic materials listed above.

[0094] A cover window protection layer 310 may be disposed in front of the cover window 320. The cover window protection layer 310 may perform at least one of the functions of anti-scattering, impact absorption, stab prevention, anti-fingerprint, and anti-glare of the cover window 320. The cover window protection layer 310 may be formed by a transparent polymer film. The transparent polymer film may include at least one of PET (PolyEthylene Terephthalate), PEN (PolyEthylene Naphthalate), PES (Polyether Sulfone), PI (PolyImide), PAR (PolyARylate), PC (PolyCarbonate), PMMA (PolyMethyl MethAcrylate), or COC (CycloOlefin Copolymer) resins.

[0095] The front stacked structure 300 may include front combining components 351, 352, and 353 for combining adjacent stacked components. For example, a first front combining component 351 may be configured between the cover window 320 and the cover window protective layer 310 to combine the two, a second front combining component 352 may be configured between the cover window 320 and the polarizing component 330 to combine the two, and a third front combining component 353 may be configured between the polarizing component 330 and the display panel 100 to combine the two. That is, the front combining components 351, 352, and 353 are components for attaching each layer to one side of the display panel 100, the first front combining component 351 may be a protective layer combining component for attaching the cover window protective layer 310, the second front combining component 352 may be a window combining component for attaching the cover window 320, and the third front combining component 353 may be a polarizing part combining component for attaching the polarizing component 330. The front combining components 351, 352, and 353 may all be optically transparent components.

[0096] The rear stack structure 400 is disposed at the rear of the display panel 100. The rear stack structure 400 may include a polymer film layer 410 disposed at the rear of the display panel 100.

[0097] The polymer film layer 410 may include a polymer film. The polymer film layer 410 may include, for example, polyimide (PI), polyethylene terephthalate (PET), polycarbonate (PC), polyethylene (PE), polypropylene (PP), polysulfone (PSF), polymethyl methacrylate (PMMA), triacetyl cellulose (TAC), cycloolefin polymer (COP), etc. The polymer film layer 410 may include a functional layer on at least one side. The functional layer may include, for example, a light absorbing layer. The light absorbing layer may include a light absorbing substance such as a black pigment or dye. The light absorbing layer may be formed on the polymer film by coating or printing using black ink.

[0098] The rear stacked structure 400 may include a rear combining component 451 for combining adjacent stacked components. For example, a first rear combining component 451 may be disposed between the display panel 100 and the polymer film layer 410 to combine the two.

[0099] On the other hand, a first shielding member 420 and a metal plate 200 may be disposed behind the display module 10 .

[0100] In one embodiment, a first shielding member 420 may be disposed behind the polymer film layer 410. The first shielding member 420 may prevent foreign matter from flowing into the display module 10 from the outside. The first shielding member 420 may be formed of a stretchable material whose length is variable as the display device 1 is folded and unfolded. The specific structure of the first shielding member 420 will be described later.

[0101] Reference Figures 1 to 4 The display device 1 according to one embodiment may include a metal plate 200 disposed behind the display module 10 .

[0102] The metal plate 200 may be disposed on the back side of the first shielding member 420. The metal plate 200 may be disposed to overlap the first non-folding area NFA1, the folding area FA, and the second non-folding area NFA2. The metal plate 200 may be flexible and folded with the folding axis FX as a reference. The metal plate 200 may be configured to include a pattern forming a plurality of openings so that at least a portion of the metal plate 200 is retractable.

[0103] The metal plate 200 may have a rectangular shape that is long in the second direction Y, but is not limited thereto. In one embodiment, the metal plate 200 may include a front surface and a back surface that are parallel to a plane formed by the intersection of the first direction X and the second direction Y, and a plurality of side surfaces extending along the third direction Z between the front surface and the back surface.

[0104] The metal plate 200 may be formed in a larger size than the display module 10. In some embodiments, the length of the metal plate 200 in the first direction X and the length in the second direction Y may be greater than the display module 10. The metal plate 200 may have a thin thickness of about 0.1 mm to 0.2 mm.

[0105] The metal plate 200 may include stainless steel. The stainless steel may include, for example, at least one of iron, chromium, carbon, nickel, silicon, manganese and molybdenum and alloys thereof. In one embodiment, the metal plate 200 may be made of austenitic stainless steel.

[0106] In one embodiment, the metal plate 200 may include a first plate portion 210 , a second plate portion 220 , and a connecting portion 230 .

[0107] The first plate portion 210 and the second plate portion 220 are arranged in the second direction Y. The first plate portion 210 and the second plate portion 220 may be configured to be symmetrical with respect to the folding axis FX or the folding area FA. In one embodiment, the first plate portion 210 may be configured to overlap with the first non-folding area NFA1, and the second plate portion 220 may be configured to overlap with the second non-folding area NFA2. Thus, the first plate portion 210 and the second plate portion 220 may remain flat regardless of the folding of the display device 1. The first plate portion 210 and the second plate portion 220 may have a rectangular shape on a plane, but are not limited thereto. In one embodiment, the first plate portion 210 and the second plate portion 220 may be portions that do not expand or contract and maintain a length or size when the display device 1 is folded.

[0108] The connecting portion 230 may be disposed between the first plate portion 210 and the second plate portion 220. The connecting portion 230 may be disposed in the folding area FA. The connecting portion 230 may be configured to overlap with the folding axis FX in the first direction X in the thickness direction. The connecting portion 230 is flexible. The connecting portion 230 will not be stretched or compressed due to the folding or unfolding of the metal plate 200. The connecting portion 230 may have greater stretchability than the first plate portion 210 and / or the second plate portion 220. The connecting portion 230 may reduce the tensile or compressive stress generated by the bending of the metal plate 200. The connecting portion 230 may include a pattern forming a plurality of openings.

[0109] The aforementioned first shielding member 420 and the metal plate 200 may be combined by the first combining member 510 and the second combining member 520 , respectively, so as to be combined to the rear of the display module 10 .

[0110] Specifically, the second bonding member 520 may be disposed between the polymer film layer 410 and the first shielding member 420 to bond the two together. In addition, the first bonding member 510 may be disposed between the first shielding member 420 and the metal plate 200 to bond the two together.

[0111] Below, in Figures 6 to 8 The first shielding member 420 and the metal plate 200 are described in more detail in FIG.

[0112] Figure 6 It is a cross-sectional view showing a part of a display device according to an embodiment. Figure 7 FIG. 1 is a cross-sectional view showing a portion of a display device according to an embodiment in a folded state. Figure 8 FIG. 2 is a cross-sectional view schematically showing a connection portion between the first connecting member and the metal plate. Figure 6 and Figure 7In order to show the relationship between the first shielding member 420 and the metal plate 200 , only the polymer film layer 410 , the second bonding member 520 , the first shielding member 420 , the first bonding member 510 and the metal plate 200 in the display device 1 are shown for description.

[0113] Reference Figure 6 A display device 1 involved in one embodiment may include a polymer film layer 410, a second combining component 520 arranged on the back of the polymer film layer 410, a first shielding component 420 arranged on the back of the second combining component 520, a first combining component 510 arranged on the back of the first shielding component 420, and a metal plate 200 arranged on the back of the first combining component 510.

[0114] In one embodiment, the first shielding member 420 may have a large modulus so as not to be deformed by the shape of the lattice pattern of the connection portion 230 of the metal plate 200. For example, the first shielding member 420 may be formed of a material having a modulus of 1 GPa or more. Specifically, the first shielding member 420 may have a modulus ranging from 1 GPa to 300 GPa.

[0115] In one embodiment, the first shielding member 420 may include a polymer material having elastic or plastic properties. For example, the first shielding member 420 may include any one or more selected from polyimide (PI), polyacrylate (PA), polymethyl methacrylate (PMMA), polycarbonate (PC), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyether sulfone (PES), polyarylate (PAR), and cycloolefin copolymer (COC).

[0116] In the case where the first shielding member 420 includes a polymer material, the first shielding member 420 may have a modulus ranging from 1 GPa to 10 GPa. Preferably, the first shielding member 420 may have a modulus ranging from 3 GPa to 7 GPa.

[0117] like Figure 7As shown, when the display device 1 is folded, the connection portion 230 of the metal plate 200 may contact the first shielding member 420 to apply a force pressing the first shielding member 420. At this time, if high heat is applied, the lattice pattern shape of the connection portion 230 may remain on the first shielding member 420 pressed by the connection portion 230, and thus may be recognized by the user.

[0118] In one embodiment, the modulus of the first shielding member 420 is formed to be large in the range of 1 GPa to 10 GPa so that the lattice pattern of the connection portion 230 of the metal plate 200 does not remain. In addition, the thickness of the first shielding member 420 is at least 25 μm or more, preferably in the range of 25 μm to 80 μm, so that the lattice pattern shape of the connection portion 230 does not remain.

[0119] In other embodiments, the first shielding member 420 may include metal, for example, any one or more selected from stainless steel (Steel Used Stainless, SUS), Invar, aluminum, iron, chromium, carbon, nickel, silicon, manganese, and molybdenum.

[0120] In the case where the first shielding member 420 includes metal, the first shielding member 420 may have a modulus ranging from 10 GPa to 300 GPa. Preferably, the first shielding member 420 may have a modulus ranging from 30 GPa to 200 GPa.

[0121] In the present embodiment, the modulus of the first shielding member 420 is formed large in the range of 10 GPa to 300 GPa so that the lattice pattern of the connection portion 230 of the metal plate 200 does not remain. The thickness of the first shielding member 420 including metal may have a thickness of at least 10 μm or more, preferably in the range of 10 μm to 50 μm so that the lattice pattern shape of the connection portion 230 does not remain.

[0122] In one embodiment, the first shielding member 420 may include a black material or have a black coating on the upper surface or the lower surface in order to prevent the lattice pattern of the connection portion 230 of the metal plate 200 from being recognized.

[0123] Reference Figure 6 The second bonding member 520 may be disposed between the first shielding member 420 and the polymer film layer 410 to bond the first shielding member 420 and the polymer film layer 410. In addition, the first bonding member 510 may be disposed between the first shielding member 420 and the metal plate 200 to bond the first shielding member 420 and the metal plate 200.

[0124] The second bonding member 520 may be disposed on the entire back surface of the polymer film layer 410, and may be disposed on the entire front surface of the first shielding member 420. The second bonding member 520 may be a pressure sensitive adhesive (PSA), but is not limited thereto, and any material may be applicable as long as it is a resin having bonding or adhesive properties.

[0125] The first coupling member 510 may be disposed on the back side of the first shielding member 420. The first coupling member 510 may include a first coupling portion 512 and a second coupling portion 514 spaced apart from each other. The first coupling member 510 may be disposed overlapping the first non-folding area NFA1 and the second non-folding area NFA2.

[0126] The first combining portion 512 and the second combining portion 514 are arranged in the second direction Y. The first combining portion 512 and the second combining portion 514 may be arranged symmetrically with respect to the folding area FA. In one embodiment, the first combining portion 512 may be arranged overlapping with the first non-folding area NFA1, and the second combining portion 514 may be arranged overlapping with the second non-folding area NFA2. In addition, the first combining portion 512 may be arranged overlapping with the first plate portion 210 of the metal plate 200, and the second combining portion 514 may be arranged overlapping with the second plate portion 220.

[0127] A first spacing interval SW1 may be provided between the first coupling portion 512 and the second coupling portion 514 to space the first coupling portion 512 and the second coupling portion 514 apart from each other. The first spacing interval SW1 may be provided in the folding area FA. The first spacing interval SW1 may be provided to extend in the first direction X.

[0128] In one embodiment, the first spaced-apart interval SW1 of the first combining member 510 may overlap the connection portion 230 of the metal plate 200 .

[0129] like Figure 8 As shown, when the first combining component 510 overlaps with the connecting portion 230 of the metal plate 200, the first combining component 510 may be sandwiched between the connecting portion 230 of the metal plate 200. Specifically, when the display device 1 is repeatedly folded and unfolded under high temperature and high humidity conditions, the first combining component 510 may be sandwiched between the grid patterns of the connecting portion 230. As a result, when the display device 1 is unfolded, the display module 10 may sag downward and bend and deform, so that the grid pattern shape is recognizable.

[0130] In one embodiment, the first spacing distance SW1 of the first coupling member 510 may be configured to overlap with the connection portion 230 of the metal plate 200, thereby preventing the lattice pattern shape of the connection portion 230 of the metal plate 200 from being recognized. To this end, it is preferred that the first spacing distance SW1 of the first coupling member 510 is formed to be equal to or larger than the width MW of the connection portion 230 of the metal plate 200.

[0131] Refer again Figure 6 In one embodiment, in order to improve the impact resistance of the display device 1, the first combining member 510 and the second combining member 520 may be formed in a predetermined thickness range.

[0132] Specifically, the thickness T2 of the second combining component 520 may be 1 μm to 50 μm. The second combining component 520 may have an optimal thickness for combining the polymer film layer 410 and the first shielding component 420. In this case, the sum of the thickness T1 of the first combining component 510 and the thickness T2 of the second combining component 520 (T1+T2) may be greater than 1 μm and less than 80 μm. The greater the thickness T1 of the first combining component 510 and the thickness T2 of the second combining component 520, the lower the impact resistance may be. Therefore, it is preferred that the sum of the thickness T1 of the first combining component 510 and the thickness T2 of the second combining component 520 does not exceed 80 μm. The thickness T1 of the first combining component 510 may be formed with any thickness as long as it is within the range that satisfies the above conditions, but in order to prevent the first combining component 510 from sagging, it is preferably 25 μm or less.

[0133] Fig. 9 is a cross-sectional view showing a display device according to another embodiment. Fig.10 is a cross-sectional view showing a portion of a display device according to another embodiment. Fig.10 The first combining member 510 , the metal plate 200 , the second shielding member 250 , and the heat dissipating member 600 are shown for description.

[0134] Reference Fig. 9 and Fig.10 The display device 1 of this embodiment may include a first shielding component 420 and a metal plate 200. In particular, Figure 4 , Figures 6 to 8 The difference between the embodiment of the present invention and the embodiment of the present invention is that a second shielding member 250 is further arranged behind the metal plate 200, and the other structures are substantially the same or similar. Therefore, repeated descriptions are omitted and the difference is mainly described.

[0135] Reference Fig. 9, a second shielding member 250 may be disposed on the back of the metal plate 200. The second shielding member 250 may prevent foreign matter from flowing into the display module 10 from the outside. The second shielding member 250 may be formed of a stretchable material whose length is variable as the display device 1 is folded and unfolded.

[0136] In one embodiment, the second shielding member 250 may have a small modulus in order to cope with the folding and unfolding operation of the display device 1. For example, the second shielding member 250 may be formed of a material having a modulus less than 1 GPa. In one embodiment, the second shielding member 250 may include a polymer material having a hyper elastic property. The second shielding member 250 may be, for example, a thermoplastic polyurethane (TPU) having elasticity. The second shielding member 250 may be formed with a thickness ranging from 1 μm to 20 μm.

[0137] The third bonding member 530 may be disposed between the metal plate 200 and the second shielding member 250 to bond the metal plate 200 and the second shielding member 250 .

[0138] The third coupling member 530 may be arranged to overlap the first plate portion 210, the second plate portion 220, and the connection portion 230 of the metal plate 200. In particular, the third coupling member 530 may overlap the connection portion 230 to prevent external foreign matter from flowing into the display module 10.

[0139] A heat dissipation component 600 may be disposed on the back side of the second shielding component 250. The heat dissipation component 600 serves to diffuse the heat generated by the display panel 100 or other components of the display device 1. In some embodiments, the heat dissipation component may include a first heat dissipation layer and a second heat dissipation layer, wherein the first heat dissipation layer includes graphite or carbon nanotubes, etc., and the second heat dissipation layer may be formed of a metal film such as copper, nickel, ferrite, silver, etc. that can shield electromagnetic waves and has excellent thermal conductivity.

[0140] The heat dissipation member 600 may be arranged to overlap the first non-folding area NFA1, the folding area FA, and the second non-folding area NFA2. The heat dissipation member 600 may have a rectangular shape that is long in the second direction Y, but is not limited thereto. The heat dissipation member 600 may be formed in a smaller size than the display module 10 and the metal plate 200. In some embodiments, the heat dissipation member 600 may have a length in the first direction X and a length in the second direction Y that is smaller than the display module 10 and the metal plate 200.

[0141] In one embodiment, the heat dissipation component 600 may include a first heat dissipation portion 610 and a second heat dissipation portion 620 that are spaced apart from each other.

[0142] The first heat dissipation portion 610 and the second heat dissipation portion 620 are arranged in the second direction Y. The first heat dissipation portion 610 and the second heat dissipation portion 620 may be arranged symmetrically with respect to the folding area FA. In one embodiment, the first heat dissipation portion 610 may be arranged to overlap with the first non-folding area NFA1, and the second heat dissipation portion 620 may be arranged to overlap with the second non-folding area NFA2. In addition, the first heat dissipation portion 610 may be arranged to overlap with the first plate portion 210 of the metal plate 200, and the second heat dissipation portion 620 may be arranged to overlap with the second plate portion 220.

[0143] A second spacing distance SW2 that separates the first heat dissipation portion 610 and the second heat dissipation portion 620 from each other may be configured between the first heat dissipation portion 610 and the second heat dissipation portion 620. The second spacing distance SW2 may be configured in the folding area FA, and the second spacing distance SW2 may be configured to overlap with the connection portion 230 of the metal plate 200. Due to the second spacing distance SW2, in the folded state of the display device 1, the first heat dissipation portion 610 and the second heat dissipation portion 620 may be maintained flat regardless of the folding of the display device 1. In one embodiment, the first heat dissipation portion 610 and the second heat dissipation portion 620 may be portions that do not expand or contract and maintain a length or size when the display device 1 is folded. In one embodiment, the second spacing distance SW2 may be formed with a width smaller than the width MW of the connection portion 230 of the metal plate 200.

[0144] On the other hand, the fourth coupling member 540 may be disposed between the heat dissipation member 600 and the second shielding member 250 .

[0145] The fourth combining member 540 may be disposed on the back side of the second shielding member 250. The fourth combining member 540 may include a third combining portion 542 and a fourth combining portion 544 spaced apart from each other. The fourth combining member 540 may be disposed overlapping the first non-folding area NFA1 and the second non-folding area NFA2.

[0146] The third combining portion 542 and the fourth combining portion 544 are arranged in the second direction Y. The third combining portion 542 and the fourth combining portion 544 may be arranged symmetrically with respect to the folding area FA. In one embodiment, the third combining portion 542 may be arranged overlapping with the first non-folding area NFA1, and the fourth combining portion 544 may be arranged overlapping with the second non-folding area NFA2. In addition, the third combining portion 542 may be arranged overlapping with the first plate portion 210 of the metal plate 200, and the fourth combining portion 544 may be arranged overlapping with the second plate portion 220.

[0147] A third spacing interval SW3 that spaces the third and fourth coupling portions 542 and 544 apart from each other may be disposed between the third coupling portion 542 and the fourth coupling portion 544. The third spacing interval SW3 may be disposed in the folding area FA. The third spacing interval SW3 may be configured to extend in the first direction X.

[0148] In one embodiment, the third spacing distance SW3 of the fourth combining member 540 may overlap with the connection portion 230 of the metal plate 200. In addition, the third spacing distance SW3 of the fourth combining member 540 may overlap with the second spacing distance SW2 of the heat dissipation member 600. The third spacing distance SW3 of the fourth combining member 540 may be formed to be larger than the second spacing distance SW2 of the heat dissipation member 600. That is, in the folding area FA, the heat dissipation member 600 and the fourth combining member 540 are not bonded, so that the folding operation of the display device 1 can be easily performed.

[0149] Fig.11 is a cross-sectional view showing a display device according to still another embodiment. Fig.12 FIG. 1 is a cross-sectional view showing a portion of a display device according to another embodiment. Fig.12 1 and 2 , the first coupling member 510 , the metal plate 200 , the second shielding member 250 , the heat dissipating member 600 , and the spacer member 700 are shown for description.

[0150] Reference Fig.11 and Fig.12 The display device 1 involved in this embodiment may include a first shielding component 420, a metal plate 200, a second shielding component 250 and a heat dissipation component 600. In particular, Figure 4 , Figures 6 to 10 The difference between the embodiment of the present invention is that a spacer member 700 is further arranged behind the heat dissipation member 600 and functional holes PH1 and PH2 are arranged in the display device 1, and the rest of the configuration is substantially the same or similar. Therefore, repeated descriptions are omitted and the difference is mainly described.

[0151] Reference Fig.11 and Fig.12 , a gasket component 700 may be disposed behind the heat dissipation component 600. The gasket component 700 may absorb external impact to prevent the display panel 100 from being damaged. The gasket component 700 may be formed of a single layer or a plurality of laminated films. The gasket component 700 may be formed of, for example, an elastic material such as polyurethane or polyethylene resin. In one embodiment, the gasket component 700 may be formed of a foaming material similar to a sponge.

[0152] In one embodiment, the spacer component 700 may be arranged to overlap with the first non-folding area NFA1, the folding area FA, and the second non-folding area NFA2. The spacer component 700 may have a rectangular shape that is long in the second direction Y, but is not limited thereto. The spacer component 700 may be formed in a smaller size than the display module 10 and the metal plate 200. In some embodiments, the spacer component 700 may have a length in the first direction X and a length in the second direction Y that is smaller than the display module 10 and the metal plate 200. In addition, the spacer component 700 may be formed in substantially the same size as the aforementioned heat dissipation component 600.

[0153] In one embodiment, the gasket component 700 may include a first gasket portion 710 and a second gasket portion 720 that are spaced apart from each other.

[0154] The first gasket portion 710 and the second gasket portion 720 are arranged in the second direction Y. The first gasket portion 710 and the second gasket portion 720 may be arranged symmetrically with respect to the folding area FA. In one embodiment, the first gasket portion 710 may be arranged to overlap with the first non-folding area NFA1, and the second gasket portion 720 may be arranged to overlap with the second non-folding area NFA2. In addition, the first gasket portion 710 may be arranged to overlap with the first plate portion 210 of the metal plate 200, and the second gasket portion 720 may be arranged to overlap with the second plate portion 220.

[0155] A fourth spacing distance SW4 that separates the first gasket portion 710 and the second gasket portion 720 from each other may be arranged between the first gasket portion 710 and the second gasket portion 720. The fourth spacing distance SW4 may be arranged in the folding area FA, and may be arranged overlapping with the connection portion 230 of the metal plate 200. Due to the fourth spacing distance SW4, in the folded state of the display device 1, the first gasket portion 710 and the second gasket portion 720 may be maintained flat regardless of the folding of the display device 1. In one embodiment, the first gasket portion 710 and the second gasket portion 720 may be portions that do not expand or contract and maintain a length or size when the display device 1 is folded. In one embodiment, the fourth spacing distance SW4 may be formed with a width smaller than the width MW of the connection portion 230 of the metal plate 200. The fourth spacing distance SW4 of the gasket member 700 may overlap with the second spacing distance SW2 of the heat dissipation member 600 and may be formed with substantially the same width therewith.

[0156] On the other hand, a fifth coupling member 550 may be disposed between the spacer member 700 and the heat dissipation member 600 .

[0157] The fifth combining member 550 may be disposed on the back side of the heat dissipation member 600. The fifth combining member 550 may include a fifth combining portion 552 and a sixth combining portion 554 spaced apart from each other. The fifth combining member 550 may be disposed overlapping the first non-folding area NFA1 and the second non-folding area NFA2.

[0158] The fifth combining portion 552 and the sixth combining portion 554 are arranged in the second direction Y. The fifth combining portion 552 and the sixth combining portion 554 may be arranged symmetrically with respect to the folding area FA. In one embodiment, the fifth combining portion 552 may be arranged overlapping with the first non-folding area NFA1, and the sixth combining portion 554 may be arranged overlapping with the second non-folding area NFA2. In addition, the fifth combining portion 552 may be arranged overlapping with the first plate portion 210 of the metal plate 200, and the sixth combining portion 554 may be arranged overlapping with the second plate portion 220.

[0159] A fifth spacing interval SW5 that spaces the fifth and sixth coupling portions 552 and 554 apart from each other may be disposed between the fifth coupling portion 552 and the sixth coupling portion 554. The fifth spacing interval SW5 may be disposed in the folding area FA. The fifth spacing interval SW5 may be configured to extend in the first direction X.

[0160] In one embodiment, the fifth spacing distance SW5 of the fifth combining member 550 may overlap with the connection portion 230 of the metal plate 200. In addition, the fifth spacing distance SW5 of the fifth combining member 550 may overlap with the second spacing distance SW2 of the heat dissipation member 600, and may overlap with the fourth spacing distance SW4 of the gasket member 700. In addition, the fifth spacing distance SW5 of the fifth combining member 550 may be substantially the same as the second spacing distance SW2 of the heat dissipation member 600 and the fourth spacing distance SW4 of the gasket member 700.

[0161] Reference Fig.11 , the display device 1 may include a plurality of functional holes PH1, PH2.

[0162] The plurality of functional holes PH1 and PH2 may be arranged to overlap with the first unfolded area NFA1 or the second unfolded area NFA2. In one embodiment, the plurality of functional holes PH1 and PH2 may be arranged in the second unfolded area NFA2 and may be arranged to penetrate a predetermined structure in the third direction Z.

[0163] An infrared sensor or a motion sensor may be disposed in the first functional hole PH1, and a camera may be disposed in the second functional hole PH2. The first functional hole PH1 may penetrate the first shielding component 420, the metal plate 200, the second shielding component 250, the heat dissipation component 600, and the gasket component 700. In one embodiment, the first functional hole PH1 may penetrate the second combining component 520, the first shielding component 420, the first combining component 510, the metal plate 200, the third combining component 530, the second shielding component 250, the fourth combining component 540, the heat dissipation component 600, the fifth combining component 550, and the gasket component 700.

[0164] The second functional hole PH2 may penetrate the rest of the stacked structures except the cover window 320 and the cover window protection layer 310. In one embodiment, the second functional hole PH2 may penetrate the second front combining component 352, the polarizing component 330, the third front combining component 353, the display panel 100, the first rear combining component 451, the polymer film layer 410, the second combining component 520, the first shielding component 420, the first combining component 510, the metal plate 200, the third combining component 530, the second shielding component 250, the fourth combining component 540, the heat dissipation component 600, the fifth combining component 550 and the gasket component 700.

[0165] The display device involved in the above-mentioned embodiments can improve the impact resistance by configuring a gasket component on the back side of the metal plate. In addition, by configuring a first shielding component with a large modulus, it is possible to prevent the lattice pattern shape of the connection portion of the metal plate from being recognized. In addition, by forming the thickness of the first combining component and the second combining component respectively configured at the upper and lower parts of the first shielding component within a predetermined range, the impact resistance can be improved. In addition, by forming the first combining component configured between the first shielding component and the metal plate and the connection portion of the metal plate not overlapping, it is possible to prevent the display module from sagging in the area overlapping with the connection portion of the metal plate.

[0166] Hereinafter, the impact resistance characteristics and pattern see-through characteristics of the display devices according to the above-mentioned embodiments are observed through manufacturing examples and experimental examples.

[0167] Fig.13 It is a cross-sectional view showing a display device sample #1 according to a manufacturing example.

[0168] <Manufacturing Example 1: Manufacture of Display Device Sample>

[0169] As display device sample #1, a display device was manufactured as follows Fig.13Specifically, a display device is manufactured, which is sequentially stacked with a cover window protection layer 310, a first front combining component 351, a cover window 320, a second front combining component 352, a polarizing component 330, a third front combining component 353, a display panel 100, a first rear combining component 451, a polymer film layer 410, a second combining component 520, a first shielding component 420, a gasket component 700, a first combining component 510, a metal plate 200, a third combining component 530, a second shielding component 250, a fourth combining component 540, a first heat dissipation component 640, a fifth combining component 550, and a second heat dissipation component 650.

[0170] As display device sample #2, a display device sample was manufactured as follows Fig.11 The display device shown. Fig.11 The display device has been described above, and thus the description thereof is omitted. At this time, the display device sample #2 is manufactured so that the sum of the thicknesses of the first bonding member 510 and the second bonding member 520 is 110 μm.

[0171] Display device sample #3 was manufactured in the same manner as display device sample #2, except that the total thickness of the first bonding member 510 and the second bonding member 520 was 80 μm.

[0172] Display device sample #4 was manufactured in the same manner as display device sample #2, except that the total thickness of the first bonding member 510 and the second bonding member 520 was 65 μm.

[0173] Display device sample #5 was manufactured in the same manner as display device sample #2, except that the total thickness of the first bonding member 510 and the second bonding member 520 was 50 μm.

[0174] Display device sample #6 was manufactured in the same manner as display device sample #2, except that the total thickness of the first bonding member 510 and the second bonding member 520 was 35 μm.

[0175] Display device sample #7 was manufactured in the same manner as display device sample #2, except that the total thickness of the first bonding member 510 and the second bonding member 520 was 25 μm.

[0176] <Experimental Example 1: Measurement of impact resistance characteristics>

[0177] The pen drop test was performed on each of the display device samples #1 to #7 to measure the impact resistance characteristics. The results are shown in the following Table 1. In the following Table 1, the impact resistance improvement effect is described using the pen drop height increased based on the display device sample #1.

[0178] [Table 1]

[0179]

[0180] Referring to Table 1, the pen drop height increases in samples #3 to #7 where the spacer member 700 is arranged at the lower part of the metal plate 200, compared to the display device sample #1 where the spacer member 700 is arranged at the upper part of the metal plate 200. In particular, in the display device sample #2 where the sum of the thickness of the first connecting member 510 and the second connecting member 520 is 110 μm, the pen drop height does not change, but in the display device samples #3 to 7 where the sum of the thickness of the first connecting member 510 and the second connecting member 520 is 80 μm, 65 μm, 50 μm, 35 μm, and 25 μm, respectively, the more the sum of the thickness of the first connecting member 510 and the second connecting member 520 decreases, the more the pen drop height gradually increases.

[0181] It can be seen from this that the display device 1 according to one embodiment can improve the impact resistance property by forming the sum of the thicknesses of the first connecting member 510 and the second connecting member 520 to be in the range of 25 μm to 80 μm.

[0182] Fig.14 It is a cross-sectional view showing a display device of display device sample #8 according to a manufacturing example.

[0183] <Manufacturing Example 2: Manufacture of Display Device Sample>

[0184] As display device sample #8, a display device was manufactured as follows Fig.14 The display device shown in FIG. 1 is a display device. Specifically, a display device is manufactured in which a cover window protection layer 310, a first front bonding component 351, a cover window 320, a second front bonding component 352, a polarization component 330, a third front bonding component 353, a display panel 100, a first rear bonding component 451, a polymer film layer 410, a second bonding component 520, a first shielding component 420, a first bonding component 510, a second shielding component 250, a third bonding component 530, a metal plate 200, a fourth bonding component 540, a heat dissipation component 600, a fifth bonding component 550, and a gasket component 700 are sequentially stacked. At this time, the thickness of the second bonding component 520 and the first shielding component 420 disposed on the upper part of the metal plate 200 is manufactured to be 25 μm, respectively, and the thickness of the first bonding component 510, the second shielding component 250, and the third bonding component 530 is 8 μm, respectively.

[0185] As display device sample #9, a display device was manufactured as follows Fig.11 The display device shown. Fig.11The display device has been described above, so the description is omitted. At this time, the display device sample #9 is manufactured so that the thickness of the second bonding member 520 and the first shielding member 420 disposed on the upper part of the metal plate 200 are 25 μm respectively, and the thickness of the first bonding member 510 is 8 μm. In addition, the first shielding member 420 is manufactured with polyimide having a modulus of 4.5 GPa.

[0186] Display device sample #10 was manufactured in the same manner as display device sample #9 except that the modulus of the first shielding member 420 was 10 GPa.

[0187] Display device sample #11 was manufactured in the same manner as display device sample #9 except that the thickness of the first shielding member 420 was 35 μm.

[0188] Display device sample #12 was manufactured in the same manner as display device sample #9 except that the thickness of the first bonding member 510 was 16 μm.

[0189] <Experimental Example 2: Grid Pattern Recognition Measurement>

[0190] After display device samples #8 to #12 were stored in a folded state at 60°C and 93% humidity for 24 hours, the height distribution was measured using a 3D profilometer while moving from the center of the connection of the metal plate toward the edge. Fig.15 The results are shown in FIG. Fig.15 This is a graph showing the height distribution based on the distance from the center of the connection portion of the metal plate in each display device sample.

[0191] Reference Fig.15 In the display device sample #8 in which the first shielding member 420 and the second shielding member 250 are arranged on the upper part of the metal plate 200, the height difference between the low point and the high point of the height distribution of the display device in the area overlapping with the connection part 230 of the metal plate 200 is more than 1 μm. That is, the lattice pattern shape of the connection part 230 of the metal plate 200 deforms the display module arranged on the upper part of the metal plate 200, so that the display module becomes uneven. Therefore, if the height difference between the low point and the high point of the folding area FA overlapping with the connection part 230 of the metal plate 200 is more than 1 μm, the height difference can be recognized by the user.

[0192] In display device sample #9 in which only the first shielding member 420 is disposed on the upper portion of the metal plate 200, the height difference between the low point and the high point of the height distribution of the display device in the area overlapping with the connection portion 230 of the metal plate 200 is also greater than 1 μm, so that a lattice pattern shape is recognized to some extent.

[0193] On the contrary, in the display device sample #10 in which the modulus of the first shielding member 420 was increased to 10 GPa, the display device sample #11 in which the thickness of the first shielding member 420 was increased to 35 μm, and the display device sample #12 in which the thickness of the first bonding member 510 was increased to 16 μm under the same structure as the display device sample #9, the height difference between the low point and the high point of the height distribution of the display device in the area overlapping with the connection portion 230 of the metal plate 200 was less than 0.5 μm. That is, the user did not recognize the height difference caused by the deformation of the display module caused by the lattice pattern shape of the connection portion.

[0194] The results show that if the thickness and modulus of the first shielding member 420 are increased and the thickness of the first connecting member 510 is increased, the height difference caused by the deformation of the display module due to the lattice pattern shape of the metal plate 200 can be reduced, thereby preventing the display module from being recognized by the user.

[0195] The embodiments of the present invention are described above with reference to the accompanying drawings, but those skilled in the art should understand that the present invention can be implemented in other specific forms without changing the technical concept or essential features of the present invention. Therefore, it should be understood that the embodiments described above are illustrative in all aspects and are not restrictive.

Claims

1. A display device, comprising: A display panel including a front surface and a back surface configured with a display surface, and including a folding axis extending in a first direction; A first shielding component is disposed on the back side of the display panel; a first combining component, disposed on the back surface of the first shielding component; as well as a metal plate disposed on the back surface of the first coupling member and including a first plate portion and a second plate portion arranged in a second direction intersecting the first direction and a connecting portion connecting the first plate portion and the second plate portion, The first combining member does not overlap with the connecting portion, In a state where the display panel is folded, the connection portion of the metal plate is in contact with the first shielding member.

2. The display device according to claim 1, wherein: The modulus of the first shielding member is 1 GPa to 10 GPa.

3. The display device according to claim 2, wherein: The first shielding member has a thickness of 25 μm to 80 μm.

4. The display device according to claim 3, wherein: The first shielding member includes at least one selected from the group consisting of polyimide, polyacrylate, polymethyl methacrylate, polycarbonate, polyethylene terephthalate, polyethylene naphthalate, polyether sulfone, polyarylate, and cycloolefin copolymer.

5. The display device according to claim 1, wherein: The modulus of the first shielding member is 10 GPa to 300 GPa.

6. The display device according to claim 5, wherein: The first shielding member has a thickness of 10 μm to 50 μm.

7. The display device according to claim 6, wherein: The first shielding member includes at least one selected from stainless steel, invar, aluminum, iron, chromium, carbon, nickel, silicon, manganese and molybdenum.

8. The display device according to claim 1, wherein: The first combining member includes: a first combining portion overlapping the first plate portion; and a second combining portion spaced apart from the first combining portion and overlapping the second plate portion.

9. The display device according to claim 8, wherein: The first coupling portion and the second coupling portion are spaced apart from each other by a first spacing interval, and the first spacing interval is equal to or greater than a width of the connection portion in the second direction.

10. The display device according to claim 8, further comprising: a second combining component, disposed between the display panel and the first shielding component; The sum of the thicknesses of the first bonding member and the second bonding member is greater than 1 μm and less than 80 μm.

11. The display device according to claim 10, wherein: The second bonding member has a thickness of 1 μm to 50 μm.

12. The display device according to claim 1, further comprising: a third combining member, disposed on the back side of the metal plate; A second shielding component is arranged on the back side of the third combining component; a fourth combining member, disposed on the back surface of the second shielding member; as well as The heat dissipation component is arranged on the back surface of the fourth connecting component.

13. The display device according to claim 12, wherein: The second shielding member overlaps the first plate portion, the second plate portion, and the connecting portion.

14. The display device according to claim 12, wherein: The heat dissipation member includes a first heat dissipation portion overlapping the first plate portion and a second heat dissipation portion spaced apart from the first heat dissipation portion and overlapping the second plate portion.

15. The display device according to claim 14, wherein: A second spacing interval between the first heat dissipation portion and the second heat dissipation portion overlaps the connection portion.

16. The display device according to claim 12, wherein: The fourth combining member includes: a third combining portion overlapping the first plate portion; and a fourth combining portion spaced apart from the third combining portion and overlapping the second plate portion. The third combining portion and the fourth combining portion are spaced apart from each other by a second spacing interval, and the second spacing interval is equal to or greater than a width of the connecting portion.

17. The display device according to claim 12, further comprising: a fifth combining component, arranged on the back side of the heat dissipating component; and a gasket member disposed on the back side of the fifth coupling member, The gasket component includes: a first gasket portion overlapping the first plate portion; and a second gasket portion spaced apart from the first gasket portion and overlapping the second plate portion, The first gasket portion and the second gasket portion are spaced apart from each other by a third spacing interval, and the third spacing interval overlaps the connecting portion.

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