Display device

Abstract

A display device according to the present disclosure includes a display panel and at least one plate under the display panel. The at least one plate includes a folding shaft defined at a middle portion of the plate, a variable region including the folding shaft, and non-variable regions disposed on both sides of the variable region. The variable region includes a first region including a folding axis, first link regions disposed on both sides of the first region, and second regions disposed on both sides of the first region, the first link regions being between the first region and the second regions. The non-variable region includes a second link region connected to the second region and a third region connected to the second link region. The at least one plate includes at least one opening pattern disposed in the variable area, having a length parallel to the folding axis and a width perpendicular to the folding axis, and spaced apart by a predetermined gap.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of Korean Patent Application No. 10-2023-0108053, filed on August 18, 2023, which is incorporated herein by reference as if fully set forth herein. Technical Field

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

[0004] As the information society develops, the requirements for display devices for various products are also increasing. Therefore, in recent years, various flat panel display devices such as liquid crystal displays (LCDs), organic light emitting displays (OLEDs), micro LED displays, etc. have been developed.

[0005] In addition, a foldable display or a rollable display having the advantage of a flexible display panel that can be bent or folded can have the advantage of being able to provide a large screen display while maintaining portability. For these reasons, it has attracted much attention as a next-generation technology in the field of display devices. For example, a flexible display device can be applied to portable electronic devices such as mobile communication terminals, electronic notebooks, e-books, portable multimedia players (PMPs), navigation systems, ultra-mobile PCs (UMPCs), mobile phones, smart phones, tablet personal computers (PCs), etc. In addition, it can be applied to various fields such as televisions, displays, and automotive dashboards. Summary of the invention

[0006] In order to solve the above-mentioned problems, an object according to one embodiment of the present disclosure is to provide a display device including a structure in which image quality distortion does not occur in a deformable region (ie, a folding region) when the display device is unfolded.

[0007] Another object according to another embodiment of the present disclosure is to provide a display device that can prevent an opening pattern from being observed in a bendable region (ie, a folding region) and a non-bendable region of the display device.

[0008] Still another object according to still another embodiment of the present disclosure is to provide a display device that can improve visibility of boundaries within each of a foldable region (or rollable region) and a non-foldable region of the display device.

[0009] The purpose of solving the problems according to the embodiments of the present disclosure is not limited to the above-mentioned purposes, and other purposes not mentioned will be clearly understood by those of ordinary skill in the relevant art from the following description.

[0010] A display device according to an example of the present disclosure may include a display panel and at least one plate disposed at the lower portion of the display panel. At least one plate according to an embodiment may include a folding axis disposed at a central portion of the plate, a deformable region having a folding axis, and a non-deformable region on each side of the deformable region. The deformable region may include: a first region including a folding axis, a first link region disposed on both sides of the first region, and a second region disposed on one side of each first link region. The non-deformable region may include a second link region connected to the second region and a third region connected to the second link region. At least one plate may be disposed at the deformable region and include a plurality of opening patterns having a length parallel to the folding axis and a width perpendicular to the folding axis, wherein the opening patterns are separated by a predetermined interval (or gap). Various specific features of other embodiments may be included in the specific embodiments and the accompanying drawings.

[0011] One embodiment of the present disclosure may provide a display device that may reduce image quality distortion by arranging intervals between opening patterns of the display device including a deformable region to be gradually reduced.

[0012] Another embodiment of the present disclosure may provide a display device having a long lifespan and low power consumption by arranging opening patterns at different intervals in a deformable region and a non-deformable region of the display device.

[0013] Effects of the present disclosure may not be limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by a person of ordinary skill in the relevant art from the following description.

[0014] Since the contents of the present disclosure described in the problems to be solved, the means for solving the problems, and the effects described above do not stipulate essential features of the claims, the scope of the claims is not limited by the matters described in the contents of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present disclosure includes accompanying drawings to provide a further understanding of the present disclosure, and the accompanying drawings are incorporated into and constitute a part of the present application. The accompanying drawings illustrate embodiments of the present disclosure and are used to explain the principles of the present disclosure together with the description. In the accompanying drawings:

[0016] Figure 1 is a diagram illustrating a display panel according to an embodiment of the present disclosure.

[0017] Figure 2 It is along Figure 1 Cross-sectional view of the cutting line II' in FIG.

[0018] FIG. 3A to FIG. 3C is a perspective view showing a display device according to an embodiment of the present disclosure.

[0019] Figure 4 is a cross-sectional view showing a display device according to an embodiment of the present disclosure.

[0020] Figure 5 is a perspective view showing the rear side of the display device in the unfolded state according to the embodiment of the present disclosure.

[0021] Figure 6 It is shown Figure 5 A perspective view of the display device in a folded state is shown.

[0022] Figure 7 It is along Figure 6 Cross-sectional view along cutting line II-II'.

[0023] Figure 8 It is shown Figure 5 Magnified view of the "A" area.

[0024] Fig. 9 It is shown Figure 8 Magnified view of the "B" area.

[0025] Fig. 10A The present invention is a diagram showing an embodiment of the present invention. Figure 8 An enlarged view of a first area of ​​the plate is shown.

[0026] Fig. 10B The present invention is a diagram showing an embodiment of the present invention. Figure 8 An enlarged view of the first link area of ​​the plate is shown.

[0027] Fig. 10C The present invention is a diagram showing an embodiment of the present invention. Figure 8 An enlarged view of a second area of ​​the plate is shown.

[0028] Fig. 10D The present invention is a diagram showing an embodiment of the present invention. Figure 8 An enlarged view of the second link area of ​​the plate is shown.

[0029] Fig.11A The present invention is a diagram showing an embodiment of the present invention. Figure 8 Magnified view of the "B" area.

[0030] Fig. 11B Another embodiment of the present disclosure is shown in FIG. Figure 8 Magnified view of the "B" area.

[0031] Fig. 11C Another embodiment of the present disclosure is shown in FIG. Figure 8 Magnified view of the "B" area.

[0032] Fig.11D Another embodiment of the present disclosure is shown in FIG. Figure 8Magnified view of the "B" area.

[0033] Fig.12 It is along Figure 6 A cross-sectional view taken along a cutting line II-II' in FIG. 1 shows a display device according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0034] The advantages and features of the present disclosure and its implementation methods will be explained by the following embodiments described with reference to the accompanying drawings. However, the present disclosure can be implemented in different forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these example embodiments are provided so that the present disclosure can be sufficiently thorough and complete to help those skilled in the art fully understand the scope of the present disclosure. In addition, the scope of protection of the present disclosure is defined by the claims and their equivalents.

[0035] The shapes, sizes, ratios, angles, quantities, etc. shown in the accompanying drawings for describing various example embodiments of the present disclosure are given only as examples. Therefore, the present disclosure is not limited to the details shown in the drawings. Unless otherwise specified, the same reference numerals refer to the same elements throughout the specification. In the following description, in the case where a detailed description of a related known function or configuration may unnecessarily obscure the main points of the present disclosure, a detailed description of such known functions of the configuration may be omitted. In this specification, when the terms "including", "having", "comprising", etc. are used, one or more other elements may be added, unless a term such as "only" is used. Elements described in the singular are intended to include a plurality of elements, and vice versa, unless the context clearly indicates otherwise.

[0036] When explaining an element, the element is interpreted as including an error or tolerance range even if an explicit description of such error or tolerance range is not provided.

[0037] In the description of various embodiments of the present disclosure, in the case of describing a positional relationship, for example, in the case of using "on", "above", "below", "above", "below", "beside", "adjacent", etc. to describe the positional relationship between two parts, one or more other parts may be located between the two parts, unless more restrictive terms such as "immediately", "directly" or "closely" are used. For example, when one element or one layer is disposed "on" another element or another layer, a third layer or a third element may be inserted therebetween. In addition, if a first element is described as being located "on" a second element, this does not necessarily mean that the first element is located above the second element in the drawings. The upper and lower parts of the relevant objects may change depending on the orientation of the objects. Therefore, in the case where a first element is described as being located "on" a second element, depending on the orientation of the object, in the drawings or in the actual configuration, the first element may be located "below" the second element or "above" the second element.

[0038] When describing a temporal relationship, when the temporal order is described as, for example, "after", "subsequently", "next" or "before", discontinuities may be included unless more restrictive terms such as "exactly", "immediately" or "directly" are used.

[0039] It will be understood that although the terms "first", "second", etc. may be used herein to describe various elements, since these elements are not used to define a specific order, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element without departing from the scope of the present disclosure.

[0040] When describing various elements in the present disclosure, terms such as first, second, A, B, (a) and (b) may be used. These terms are only used to distinguish one element from another element, rather than to define the specific properties, order, sequence or quantity of the elements. When an element is described as "linked", "combined" or "connected" to another element, the element may be directly or indirectly connected to the other element, unless otherwise stated. It should be understood that one or more additional elements may be "interposed" between two elements described as "linked", "connected" or "combined" to each other.

[0041] It should be understood that the term "at least one" should be understood to include any and all combinations of one or more of the relevant listed items. For example, the meaning of "at least one of a first element, a second element, and a third element" includes the combination of all three listed elements, the combination of any two of the three elements, and each individual element (i.e., the first element, the second element, and the third element).

[0042] In the present disclosure, a "display device" may include a display device including a display panel and a driving element for driving the display panel, such as a liquid crystal module (LCM), an organic light emitting display module (OLED module), and a quantum dot module (QDM). In addition, a "display device" may include a device display device including a notebook computer, a television, a computer monitor, an automobile display device, or other display device for a vehicle as a complete product or final product having an LCM, an OLED module, or a QDM, and a complete set of electronic devices or a complete set of devices (or complete sets of devices), such as a mobile electronic device including a smart phone or an electronic tablet.

[0043] Therefore, the display device in the present disclosure may include the display apparatus itself in a narrow sense such as LCM, OLED module and QDM, as well as a complete set of equipment as an application product or end-user equipment including LCM, OLED module and QDM.

[0044] In some cases, LCM, OLED module and QDM including display panel and driver elements may be described as "display device" in a narrow sense, and electronic equipment as a finished product including LCM, OLED module and QDM may be referred to as "display device", which may be described as "set of equipment". For example, a display device in a narrow sense may include a display panel of liquid crystal, OLED or quantum dot, and a source PCB as a control unit for driving the display panel. The set of equipment may also include a set of PCBs as a set of control units for controlling the entire set of equipment.

[0045] The display panel used in the embodiments of the present disclosure may be any type of display panel, such as a liquid crystal display panel, an organic light emitting diode (OLED) display panel, a quantum dot (QD) display panel, and an electroluminescent display panel. The display panel according to the embodiments of the present disclosure is not limited to a specific display panel having a bendable frame using a flexible substrate for an organic light emitting display (OLED) display panel and a backplane support structure at the bottom of the flexible substrate. In addition, the shape or size of the display panel of the display device according to the present disclosure is not limited to the embodiments described below.

[0046] For example, in the case where the display panel is an organic light emitting diode (OLED) display panel, the display panel may include a plurality of gate lines and a plurality of data lines, and pixels formed in the intersection area of ​​the gate lines and the data lines. In addition, the display panel may be configured to include: an array layer including a thin film transistor as an element for selectively applying a voltage to each pixel, a light emitting element layer on the array layer, and an encapsulation substrate or an encapsulation layer disposed on the array layer to cover the light emitting element layer. The encapsulation layer protects the thin film transistor and the light emitting element layer from external impacts, and can prevent moisture or oxygen from penetrating into the light emitting element layer. The layer formed on the array layer may include an inorganic light emitting layer, such as a nano-sized material layer or quantum dots.

[0047] As can be fully understood by those skilled in the art, the features of the various embodiments of the present disclosure may be combined or combined with each other in part or in whole, and may interoperate and technically drive each other in various ways. The embodiments of the present disclosure may be performed independently of each other, or may be performed together in a mutually dependent relationship.

[0048] Hereinafter, the present disclosure will be explained with reference to the accompanying drawings. Since the scale of each element shown in the drawings may be different from the actual scale for the convenience of description, the present disclosure is not limited to the scale shown in the drawings.

[0049] Figure 1 is a diagram illustrating a display panel according to an embodiment of the present disclosure.

[0050] The display device according to an embodiment of the present disclosure may include a display panel 100. The display panel 100 may include a display area AA disposed on a substrate 101 and a non-display area NA disposed around the display area AA on the substrate 101.

[0051] The substrate 101 may be made of a plastic material that is flexible and can be bent. For example, the substrate 101 may be made of materials such as PI (polyimide), PET (polyethylene terephthalate), PEN (polyethylene naphthalate), PC (polycarbonate), PES (polyether sulfone), PAR (polyarylate), PSF (polysulfone) and COC (cyclic olefin copolymer), but the embodiments of the present disclosure are not limited thereto. For example, the substrate 101 may be made of glass. For another example of the present disclosure, the substrate 101 may be made of a semiconductor material such as a silicon wafer.

[0052] The display area AA may be an area for displaying a video image in which a plurality of sub-pixels PX are provided. Each of the plurality of sub-pixels PX may be a separate unit for emitting light. Each of the plurality of sub-pixels PX may include a light-emitting element and a driving circuit for the light-emitting element. For example, each sub-pixel PX may include a display element for presenting a video image and a circuit element for driving the display element. In the case where the display device is an organic light-emitting display, the display element may include an organic light-emitting element. In the case where the display device is a liquid crystal display, the display element may include a liquid crystal element. The plurality of sub-pixels PX may include red sub-pixels, green sub-pixels, blue sub-pixels and / or white sub-pixels, but the embodiments of the present disclosure are not limited thereto.

[0053] The non-display area NA may be an area where a video image is not displayed. The non-display area NA may be an area where various lines and driver ICs for driving the plurality of sub-pixels PX arranged in the display area AA are disposed. For example, the non-display area NA may include at least one of the data driver 104 and the gate driver 103, but the embodiments of the present disclosure are not limited thereto.

[0054] The non-display area NA may surround the display area AA. For example, the non-display area NA may be disposed at an outer adjacent position of the display area AA. For example, the non-display area NA may be an area extending from the display area AA. The non-display area NA may be an area where the sub-pixel PX is not disposed, but the embodiments of the present disclosure are not limited thereto.

[0055] The non-display area NA where no image is displayed may further include a bezel, but embodiments of the present disclosure are not limited thereto.

[0056] The display area AA may include a plurality of data lines DL and a plurality of gate lines GL. For example, the plurality of data lines DL may be arranged in rows or columns, and the plurality of gate lines GL may be arranged in columns or rows. One subpixel PX may be disposed in an area formed by the intersection of the data lines DL and the gate lines GL.

[0057] The sub-pixel PX arranged in the display area AA may include a thin film transistor or a transistor including a semiconductor layer. For example, the thin film transistor or the transistor may include an oxide semiconductor material, but the embodiments of the present disclosure are not limited thereto. For example, a thin film transistor may be a type of transistor, but is not limited to the term.

[0058] According to an embodiment of the present disclosure, the non-display area NA may include a gate driver 103 having a gate driving circuit. The gate driving circuit of the gate driver 103 may sequentially drive each pixel row in the display area AA by sequentially supplying a scanning signal to a plurality of gate lines GL. For example, one pixel row may include a group of pixels arranged in a row connected to one gate line. The gate driving circuit may also be referred to as a scanning driving circuit, but is not limited to this term.

[0059] The gate driving circuit may include a thin film transistor having a polycrystalline semiconductor layer, may include a thin film transistor having an oxide semiconductor layer, or may include a thin film transistor having a pair of polycrystalline semiconductor layers or a thin film transistor having an oxide semiconductor layer. When the thin film transistors disposed in the non-display area NA and the display area AA use the same semiconductor material, they may be formed simultaneously in the same process, but the embodiments of the present disclosure are not limited thereto.

[0060] The gate driving circuit may include a shift register and / or a level shifter.

[0061] Similar to the display device according to one embodiment of the present disclosure, the gate driving circuit may be implemented in the form of a GIP (gate in panel) and formed directly on the substrate 101 .

[0062] The gate driver 103 including a gate driving circuit may sequentially supply a scan signal of an on voltage or an off voltage to a plurality of gate lines.

[0063] The gate driver 103 according to an embodiment of the present disclosure may be formed directly as a thin film transistor having a polycrystalline semiconductor material for a semiconductor layer on the substrate 101. In addition, the gate driver 103 may be formed as a C-MOS type thin film transistor having a polycrystalline silicon semiconductor material as a semiconductor layer and an oxide semiconductor material as a semiconductor layer.

[0064] For example, the oxide semiconductor material may include an oxide semiconductor material based on IGZO (InGaZnO), an oxide semiconductor material based on IZO (InZnO), and an oxide semiconductor material based on IGZTO (InGaZnSnO), as well as at least one of an oxide semiconductor material based on FIZO (FeInZnO), an oxide semiconductor material based on ZnO, an oxide semiconductor material based on SIZO (SiInZnO), and an oxide semiconductor material based on ZnON (Zn-OynNitride), but the embodiments of the present disclosure are not limited thereto.

[0065] When a thin film transistor including an oxide semiconductor layer and a thin film transistor including a polycrystalline semiconductor layer are included, since electron mobility in a channel region can be increased, high resolution and low power consumption can be achieved.

[0066] The display device according to an embodiment of the present disclosure may further include a data driver 104 having a data driving circuit. When a specific gate line is activated by the gate driver 103 including the gate driver circuit, the data driving circuit may convert image data into analog data voltages and supply them to a plurality of data lines.

[0067] The plurality of gate lines GL may include a plurality of scan lines and a plurality of light emission control lines. The plurality of scan lines and the plurality of light emission control lines may be lines that transmit different types of gate signals (scan signals and light emission control signals) to respective gate nodes of different types of transistors (scan transistors and light emission control transistors).

[0068] The gate driver 103 including the gate driving circuit may include a scan driving circuit outputting scan signals to a plurality of scan lines as one type of gate lines GL, and a light emitting driving circuit outputting light emitting control signals to a plurality of light emitting control lines as another type of gate lines GL.

[0069] The display panel 100 according to an embodiment of the present disclosure may include various data lines DL connected to data pads.

[0070] Figure 2 It is along Figure 1 Cross-sectional view along the cutting line II'.

[0071] Reference Figure 2 , the display device according to an embodiment of the present disclosure may include a display area AA and a non-display area NA. The non-display area NA may be disposed to surround the display area AA.

[0072] The substrate 101 may include a first substrate, a second substrate, and an intermediate substrate between the first substrate and the second substrate, but embodiments of the present disclosure are not limited thereto.

[0073] For example, the first substrate and the second substrate may be made of at least one of polyimide, polyethersulfone, polyethylene terephthalate, and polycarbonate, but the embodiments of the present disclosure are not limited thereto. When the substrate 101 is made of a plastic material, the manufacturing process of the display device may be performed with a support substrate made of glass disposed below the substrate 101. After the manufacturing process of the display device is completed, the support substrate may be peeled off. In addition, after peeling off the support substrate, a backplane (or plate) for supporting the substrate 101 may be attached below the substrate 101. When the substrate 101 is made of a plastic material, moisture may penetrate the substrate and enter the light-emitting element layer of the transistor unit or the light-emitting unit, thereby degrading the performance of the display device. The display device according to an embodiment of the present disclosure may include two substrates, namely, a first substrate and a second substrate, made of a plastic material to prevent the performance of the display device from being degraded due to moisture penetration. In addition, by forming an inorganic intermediate layer (or substrate) between the first substrate and the second substrate, moisture can be prevented from penetrating into the substrate, thereby improving the reliability of the display device. The intermediate layer may be made of an inorganic layer. For example, the intermediate layer may be made of silicon nitride (SiN x ) or silicon oxide (SiO x ) or a multilayer thereof, but the embodiments of the present disclosure are not limited thereto. For example, the substrate may have a multilayer structure in which a first polyimide layer, an inorganic layer, and a second polyimide layer are sequentially stacked.

[0074] The display device may include a plurality of regions on the substrate 101. In the present disclosure, the display device may include a display region AA and a non-display region NA, but embodiments of the present disclosure are not limited thereto.

[0075] In another embodiment, the display panel 100 may include a substrate 101 , a transistor part 1000 , a light emitting part 2000 , an encapsulation part 3000 , a touch part 4000 , and / or a color filter part 5000 .

[0076] The transistor part 1000 , the light emitting part 2000 , the encapsulation part 3000 , the touch part 4000 , and the color filter part 5000 may be disposed on a substrate, but embodiments of the present disclosure are not limited thereto.

[0077] A buffer layer (or first buffer layer) may be disposed on one surface of the display area AA and the non-display area NA on the substrate 101. The buffer layer may be a single layer including a silicon nitride material or a silicon oxide material or a multilayer including a silicon nitride layer and a silicon oxide layer. The buffer layer may improve the adhesion between the layer deposited on the buffer layer and the substrate 101, and block various types of defects such as alkaline components from leaking from the substrate 101. The buffer layer may delay the diffusion of moisture or oxygen that may have penetrated into the substrate 101. The buffer layer may be omitted based on the type and material of the substrate and / or the structure and type of the thin film transistor.

[0078] The transistor part 1000 may be disposed in the display area AA and the non-display area NA on the substrate 101 and / or the buffer layer. The transistor in the display area AA may include a switching transistor and a driving transistor for driving a sub-pixel. The transistor in the non-display area NA may include a gate driver, for example, a transistor of a GIP or a light emitting transistor.

[0079] Reference Figure 2 , the first driving transistor Tr_R, the second driving transistor Tr_G and the third driving transistor Tr_B are respectively arranged in the red sub-pixel, the green sub-pixel and the blue sub-pixel.

[0080] Each of the first drive transistor Tr_R, the second drive transistor Tr_G, and the third drive transistor Tr_B may include a semiconductor layer 110, a gate 120, a source 130S, and a drain 130D on a substrate 101 and / or a buffer layer. The semiconductor layer 110 may include low temperature polysilicon (LTPS) or a metal oxide material. For example, the metal oxide material may include at least one of IGZO (indium gallium zinc oxide), IZO (indium zinc oxide), IGTO (indium gallium tin oxide), and IGO (indium gallium oxide), but the embodiments of the present disclosure are not limited thereto.

[0081] The LTPS semiconductor layer may include a channel region formed by an electron injection (or doping) process, and a source region connected to a source electrode and a drain region connected to a drain electrode.

[0082] The metal oxide semiconductor may have improved conductive characteristics through a doping process of injecting impurities, and may include a channel region formed with a channel through which electrons or holes move.

[0083] The first insulating layer 12 may be deposited on the semiconductor layer 110. The first insulating layer 12 may be disposed between the semiconductor layer 110 and the gate 120 so that the semiconductor layer 110 may be insulated from the gate 120. The first insulating layer 12 may be a gate insulating layer, but the embodiments of the present disclosure are not limited thereto.

[0084] The first insulating layer 12 may be made of, for example, silicon nitride (SiN x ) or silicon oxide (SiO x ), but the embodiments of the present disclosure are not limited thereto. For another example, the first insulating layer 12 may be made of an inorganic insulating material.

[0085] The gate 120 may be disposed to overlap the semiconductor layer 110. The gate 120 may include a single layer or a multilayer made of at least one of silver (Ag), molybdenum (Mo), copper (Cu), titanium (Ti), aluminum (Al), chromium (Cr), nickel (Ni), neodymium (Nd), tungsten (W), and gold (Au), or an alloy thereof, but the embodiments of the present disclosure are not limited thereto.

[0086] The second insulating layer 13 may be deposited on the gate 120. The second insulating layer 13 may be an intermediate insulating layer, but the embodiments of the present disclosure are not limited thereto.

[0087] The second insulating layer 13 may be made of silicon nitride (SiN x ) or silicon oxide (SiO x ), but the embodiments of the present disclosure are not limited thereto. For example, the second insulating layer 13 may be made of an organic insulating material.

[0088] The source electrode 130S and the drain electrode 130D may be disposed on the second insulating layer 13. The source electrode 130S and the drain electrode 130D may be connected to the semiconductor layer 110.

[0089] The source 130S and the drain 130D may be formed in the same manufacturing process. The source 130S and the drain 130D may be made of at least one of silver (Ag), molybdenum (Mo), copper (Cu), titanium (Ti), aluminum (Al), chromium (Cr), nickel (Ni), neodymium (Nd), tungsten (W), and gold (Au), but the embodiments of the present disclosure are not limited thereto. For another example, the source 130S and the drain 130D may include at least two layers including a first layer containing titanium (Ti) and a second layer containing at least one of molybdenum (Mo), copper (Cu), aluminum (Al), silver (Ag), chromium (Cr), gold (Au), neodymium (Nd), and nickel (Ni), but the embodiments of the present disclosure are not limited thereto.

[0090] The first line 151 may be formed at the non-display area NA using the same manufacturing process when the source electrode 130S and the drain electrode 130D are formed. For another example, the first line 151 may be formed in a different process from the source electrode 130S and the drain electrode 130D.

[0091] The first line 151 may supply a low potential voltage EVSS output from a flexible printed circuit board (FPCB) to the cathode 230 .

[0092] The first passivation layer 14 may be disposed on the source electrode 130S, the drain electrode 130D, and some portions of the first line 151. The first passivation layer 14 may be a first planarization layer, but the embodiments of the present disclosure are not limited thereto.

[0093] The first passivation layer 14 may be made of, for example, silicon nitride (SiN x ) and silicon oxide (SiO x ) or an organic insulating layer such as polyacrylate and polyimide, but the embodiments of the present disclosure are not limited thereto.

[0094] The connection electrode 140 may be disposed on the first passivation layer 14. The connection electrode 140 may be connected to the drain electrode via a contact hole formed at the first passivation layer 14. The anode 210 may be connected to the connection electrode 140. Therefore, the connection electrode 140 may electrically connect the drain electrode 130D to the anode 210.

[0095] The connection electrode 140 may be made of at least one of silver (Ag), molybdenum (Mo), copper (Cu), titanium (Ti), aluminum (Al), chromium (Cr), nickel (Ni), neodymium (Nd), tungsten (W), and gold (Au), but the embodiments of the present disclosure are not limited thereto. For another example, the connection electrode 140 may include at least two layers including a first layer including titanium (Ti) and a second layer including at least one of molybdenum (Mo), copper (Cu), aluminum (Al), silver (Ag), chromium (Cr), gold (Au), neodymium (Nd), and nickel (Ni), but the embodiments of the present disclosure are not limited thereto.

[0096] The second line 152 may be disposed in the non-display area NA through the same manufacturing process as the connection electrode 140. The second line 152 may be connected to the first line 151, and thus it may serve as an auxiliary electrode supplying a ground voltage to the cathode 230.

[0097] The second passivation layer 15 may be formed on some portions of the connection electrode 140 and the second line 152. The second passivation layer 15 may be a second planarization layer, but the embodiments of the present disclosure are not limited thereto.

[0098] Since the second passivation layer 15 may be made of an organic insulating material, it is possible to compensate (ie, reduce) a level difference caused by a line and a contact hole formed under the second passivation layer 15. For example, the organic insulating material may include polyacrylate and polyimide, but the embodiments of the present disclosure are not limited thereto.

[0099] The light emitting part 2000 may be disposed on the transistor part 1000. For example, the light emitting part 2000 may be disposed on the second passivation layer 15 at the display area AA. The light emitting part 2000 may include an anode 210, a light emitting element layer 220, and a cathode 230.

[0100] The anode 210 may be electrically connected to the drain 130D of the driving transistor via the connection electrode 140. The anode may be made of at least one of silver (Ag), aluminum (Al), gold (Au), molybdenum (Mo), tungsten (W), chromium (Cr), lead (Pd), indium tin oxide (ITO), and indium zinc oxide (IZO), or an alloy thereof, but the embodiments of the present disclosure are not limited thereto.

[0101] At the non-display area NA, the third line 153 may be disposed in the same manufacturing process as the anode 210. For another example, the third line 153 may be made by a manufacturing process different from that of the anode 210.

[0102] The third line 153 may be connected to the second line 152 and the first line 151 and may be an auxiliary electrode for supplying a ground voltage to the cathode 230, but the embodiments of the present disclosure are not limited thereto. For another example, neither the second line 152 nor the third line 153 may be formed.

[0103] The bank 21 may be disposed on the anode 210 and some portions of the third line 153 .

[0104] The bank 21 may distinguish or separate a plurality of sub-pixels from each other, minimize light blur, and prevent color mixing that may occur at various viewing angles. The bank 21 may expose a portion of the anode 210 corresponding to the light emitting region and may overlap a peripheral portion of the anode 210. The bank 21 may overlap a contact hole formed at the second insulating layer 13 and the first passivation layer 14 and a contact hole formed at the second passivation layer 15.

[0105] The bank 21 may be made of silicon nitride (SiN x ) or silicon oxide (SiO x ) and at least one of an inorganic insulating material such as BCB (benzocyclobutene), acrylic resin, epoxy resin, phenolic resin, polyamide resin, and polyimide resin, but the embodiments of the present disclosure are not limited thereto.

[0106] A spacer 22 may be further disposed on the bank 21. The spacer 22 may minimize damage to the display device caused by external impact by buffering an empty space between the substrate 101 on which the light emitting element layer 220 is formed and the upper substrate. The spacer 22 may be made of the same material as the bank 21 and may be formed simultaneously with the bank 21, but the embodiments of the present disclosure are not limited thereto.

[0107] The light emitting element layer 220 may be disposed on the opening region of the bank 21 exposing the anode 210. The light emitting element layer 220 may include at least one of red, green, blue, and white light emitting layers for generating specific color light, but the embodiments of the present disclosure are not limited thereto.

[0108] When the light emitting element layer 220 includes a white light emitting layer, the light emitting element layer 220 may be deposited on the entire substrate including the opening region of the bank 21 .

[0109] The cathode 230 may be deposited on the light emitting element layer 220. The cathode 230 may be an element for supplying electrons to the light emitting element layer 220. For example, the cathode 230 may be made of a conductive material having a low work function, but the embodiments of the present disclosure are not limited thereto.

[0110] In the case of a top emission type, the cathode 230 may include a transparent conductive material for transmitting light. For example, the cathode 230 may be made of at least one of indium tin oxide (ITO) and indium zinc oxide (IZO), but the embodiments of the present disclosure are not limited thereto.

[0111] For another example, the cathode 230 may be made of a semi-transparent conductive material that semi-transmits light. For example, the cathode 230 may include at least one of an alloy such as LiF / Al, CsF / Al, Mg:Ag, Ca / Ag, Ca:Ag, LiF / Mg:Ag, LiF / Ca / Ag, and LiF / Ca:Ag, but the embodiments of the present disclosure are not limited thereto.

[0112] In the case of a bottom emission type, the cathode 230 may be a reflective electrode that may be made of an opaque conductive material for reflecting light. For example, the cathode 230 may include one of silver (Ag), aluminum (Al), gold (Au), molybdenum (Mo), tungsten (W), and chromium (Cr), or an alloy thereof, but the embodiments of the present disclosure are not limited thereto.

[0113] The light emitting element layer 220 may further include a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer in addition to the light emitting layer, but the embodiments of the present disclosure are not limited thereto.

[0114] For example, the light-emitting element layer 220 can be formed by stacking a hole support layer, a light-emitting layer, and an electrode support layer on the anode 210 in the above order or in the reverse order. For example, the hole support layer can be a layer for injecting or transporting holes into the light-emitting layer. For example, the hole support layer can be a hole injection layer, a hole transport layer, or an electron blocking layer, but the embodiments of the present disclosure are not limited thereto. The electron support layer can be a layer for injecting or transporting electrons into the light-emitting layer. For example, the electron support layer can be an electron injection layer, an electron transport layer, or a hole blocking layer, but the embodiments of the present disclosure are not limited thereto.

[0115] The light emitting element layer 220 may include at least one light emitting layer. For each sub-pixel PXL, each light emitting layer may include a red light emitting layer for generating red light, a green light emitting layer for generating green light, and a blue light emitting layer for generating blue light.

[0116] The light-emitting element layer 220 may include at least two light-emitting units. The light-emitting unit may be expressed as a stack, but it is not limited to this term. The at least two light-emitting units may include a first light-emitting unit and a second light-emitting unit. For each sub-pixel, the first light-emitting unit and the second light-emitting unit may include a red light-emitting layer that generates red light, a green light-emitting layer that generates green light, and a blue light-emitting layer that generates blue light. At least two light-emitting layers included in the first light-emitting unit and the second light-emitting unit may be light-emitting layers that emit light of the same color. For another example, the first light-emitting layer included in the first light-emitting unit may be a blue light-emitting layer, a sky blue light-emitting layer, a dark blue light-emitting layer, a blue light-emitting layer and a red light-emitting layer, a sky blue light-emitting layer and a red light-emitting layer, and a dark blue light-emitting layer and a red light-emitting layer, but the embodiments of the present disclosure are not limited thereto. For example, the second light-emitting layer included in the second light-emitting unit may be a yellow light-emitting layer, a yellow-green light-emitting layer, a green light-emitting layer, a yellow light-emitting layer and a red light-emitting layer, a yellow-green light-emitting layer and a red light-emitting layer, a green light-emitting layer and a red light-emitting layer, a combination of a yellow light-emitting layer, a yellow-green light-emitting layer, a green light-emitting layer and a red light-emitting layer, a combination of two yellow-green light-emitting layers and one green light-emitting layer, a combination of two yellow-green light-emitting layers, a green light-emitting layer and a red light-emitting layer, and a combination of a yellow-green light-emitting layer, two green light-emitting layers, and one red light-emitting layer, but the embodiments of the present disclosure are not limited thereto. The charge generation layer may be disposed between the first light-emitting unit and the second light-emitting unit. The charge generation layer may include an n-type charge generation layer and a p-type charge generation layer. Each of the first light-emitting unit and the second light-emitting unit may include at least one of a hole injection layer, a hole transport layer, a hole blocking layer, an electron blocking layer, an electron transport layer, and an electron injection layer, but the embodiments of the present disclosure are not limited thereto.

[0117] At least two light-emitting units may include a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit. The first light-emitting layer included in the first light-emitting unit may be the same as described above. The second light-emitting layer included in the second light-emitting unit may be the same as described above. The third light-emitting layer included in the third light-emitting unit may be the same as the first light-emitting layer, but the embodiments of the present disclosure are not limited thereto. The first charge generation layer may be disposed between the first light-emitting unit and the second light-emitting unit. The first charge generation layer may include an n-type charge generation layer and a p-type charge generation layer. The second charge generation layer may be disposed between the second light-emitting unit and the third light-emitting unit. The second charge generation layer may include an n-type charge generation layer and a p-type charge generation layer. Each of the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit may include at least one of a hole injection layer, a hole transport layer, a hole blocking layer, an electron blocking layer, an electron transport layer, and an electron injection layer, but the embodiments of the present disclosure are not limited thereto.

[0118] At least two light-emitting units may include a first light-emitting unit, a second light-emitting unit, a third light-emitting unit, and a fourth light-emitting unit. At least two light-emitting layers in the first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the fourth light-emitting unit may include light-emitting layers that emit light of the same color. For example, at least two light-emitting layers in the first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the fourth light-emitting unit may include a blue light-emitting layer, but the embodiments of the present disclosure are not limited thereto. At least one light-emitting layer in the first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the fourth light-emitting unit may include a blue light-emitting layer and another light-emitting layer. For example, at least one light-emitting layer of the first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the fourth light-emitting unit may be a yellow light-emitting layer, a yellow-green light-emitting layer, a green light-emitting layer, a yellow light-emitting layer and a red light-emitting layer, a green light-emitting layer and a red light-emitting layer, a combination of a yellow light-emitting layer, a yellow-green light-emitting layer, a green light-emitting layer, and a red light-emitting layer, a combination of two yellow-green light-emitting layers and one green light-emitting layer, a combination of two yellow-green light-emitting layers, a green light-emitting layer and a red light-emitting layer, and a combination of a yellow-green light-emitting layer, two green light-emitting layers, and a red light-emitting layer, but the embodiments of the present disclosure are not limited thereto. The charge generation layer may be disposed between the first light-emitting unit and the second light-emitting unit. The charge generation layer may include an n-type charge generation layer and a p-type charge generation layer. Each of the first light-emitting unit and the second light-emitting unit may include at least one of a hole injection layer, a hole transport layer, a hole blocking layer, an electron blocking layer, an electron transport layer, and an electron injection layer, but the embodiments of the present disclosure are not limited thereto. The first charge generation layer may be disposed between the first light emitting unit and the second light emitting unit. The first charge generation layer may include an n-type charge generation layer and a p-type charge generation layer. The second charge generation layer may be disposed between the second light emitting unit and the third light emitting unit. The second charge generation layer may include an n-type charge generation layer and a p-type charge generation layer. The third charge generation layer may be disposed between the third light emitting unit and the fourth light emitting unit. The third charge generation layer may include an n-type charge generation layer and a p-type charge generation layer. Each of the first light emitting unit, the second light emitting unit, the third light emitting unit, and the fourth light emitting unit may include at least one of a hole injection layer, a hole transport layer, a hole blocking layer, an electron blocking layer, an electron transport layer, and an electron injection layer, but the embodiments of the present disclosure are not limited thereto.

[0119] The end of the dam portion including the driving circuit portion and the plurality of dams may be disposed in the non-display area NA of the display device. The end of the non-display area NA may be the area of ​​the connection portion where the cathode 230 is electrically connected to the low potential line, and may be the area where the display device is sealed by the encapsulation layer and the plurality of dams. At the end, the first insulating layer 12, the second insulating layer 13, the first passivation layer 14, and the second passivation layer 15 may extend and be disposed on the substrate 101.

[0120] The wires may be disposed at the end portions so that the power supply voltage and the touch signal are applied from the FPCB of the display device to the driving element through the wires.

[0121] A plurality of dams may be provided at the end of the non-display area NA. To prevent the second encapsulation layer 320 formed of an organic layer among the plurality of encapsulation layers from leaking to the outside, the dam may be formed by stacking one or more insulating layers, but the embodiments of the present disclosure are not limited thereto.

[0122] The plurality of weirs may include at least two weirs, for example, a first weir 161 , a second weir 162 , and a third weir 163 , but the number of weirs is not limited thereto. Each of the first weir 161 , the second weir 162 , and the third weir 163 may surround the display area AA.

[0123] Each of the first weir 161, the second weir 162, and the third weir 163 may have a first height, a second height, and a third height, respectively. For example, the second height may be higher than the first height, and the third height may be lower than the second height.

[0124] Even if the second encapsulation layer 320 may overflow the first dam 161 , the second encapsulation layer 320 may be prevented from leaking to the outside due to the second dam 162 .

[0125] Each of the first dam 161 , the second dam 162 , and the third dam 163 may include a first passivation layer 14 , a second passivation layer 15 , a bank 21 , and a spacer 22 .

[0126] The first line 151 may be disposed under the second passivation layer 15 of the first dam 161 and the first passivation layer 14 of the second dam 162. The second line 152 may be disposed between the second passivation layer 15 of the first dam 161 and the second dam 162 and the bank 21. The third line 153 may be disposed on the bank 21 of the first dam 161.

[0127] The first, second, and third lines 151 , 152 , and 153 may be electrically connected by contacting each other at regions of the first and second dams 161 and 162 to transmit a voltage to the cathode 230 .

[0128] The first, second, and third lines 151, 152, and 153 may be disposed to overlap some portions of a gate driver of the driving circuit part. For example, the gate driver may be formed as a gate in panel (GIP) type, but the embodiments of the present disclosure are not limited thereto.

[0129] A cover layer may be provided on the cathode 230. The cover layer may protect the cathode 230 and improve light extraction efficiency. For example, the cover layer may be formed of an organic material or an inorganic material. For example, the cover layer may be made of a metal material such as LIF (lithium fluoride) as an inorganic material and also contain an organic material, but the embodiments of the present disclosure are not limited thereto.

[0130] The encapsulation part 3000 may be disposed on the light emitting part 2000. For example, the encapsulation part 3000 may be disposed on the cathode 230 and the cover layer. The encapsulation part 3000 may protect the display device from external moisture, oxygen, or foreign matter. For example, the encapsulation part 3000 prevents oxygen and moisture from penetrating from the outside, thereby preventing oxidation of the light emitting material and the electrode material.

[0131] The encapsulation part 3000 may be made of a transparent material so that light emitted from the light emitting element layer 220 may be transmitted.

[0132] The encapsulation part 3000 may include a first encapsulation layer 310, a second encapsulation layer 320, and a third encapsulation layer 330, but the embodiments of the present disclosure are not limited thereto. The first encapsulation layer 310, the second encapsulation layer 320, and the third encapsulation layer 330 may be sequentially stacked, but the embodiments of the present disclosure are not limited thereto.

[0133] The first encapsulation layer 310 and the third encapsulation layer 330 may be made of silicon nitride (SiN x ), silicon oxide (SiO x ) or aluminum oxide (Al y O z ), but the embodiments of the present disclosure are not limited thereto.

[0134] The second encapsulation layer 320 may cover foreign matter or particles that may appear during the manufacturing process. After the first encapsulation layer 310 is deposited, the second encapsulation layer 320 may planarize the surface condition.

[0135] The second encapsulation layer 320 may be made of an organic material, such as silicon oxycarbide (SiOC). z ), epoxy resin, polyimide and polyethylene or acrylate series polymers, but the embodiments of the present disclosure are not limited thereto.

[0136] The touch part 4000 for sensing a touch operation on the display device 200 may be disposed on the third encapsulation layer 330 .

[0137] The touch part 4000 may be disposed between the encapsulation part 3000 and the color filter part 5000. For example, the touch part 4000 may include a buffer layer 41 (or a second buffer layer) disposed on the third encapsulation layer 330. The buffer layer 41 may improve adhesion between a layer formed on the buffer layer 41 and the third encapsulation layer 330. The buffer layer 41 may extend to an area where a connection area between a flexible PCB (FPCB) disposed in the non-display area NA and the substrate 101 is disposed. The buffer layer 41 may be made of silicon nitride (SiN x ) or silicon oxide (SiO x ) or a single layer or a multilayer thereof, but the embodiments of the present disclosure are not limited thereto.

[0138] The bridge electrode 410 may be disposed on the buffer layer 41. The bridge electrode 410 may connect the touch electrode 420 and transmit a touch signal. The bridge electrode 410 may be made of a single layer or multiple layers containing silver (Ag), molybdenum (Mo), copper (Cu), titanium (Ti), aluminum (Al), chromium (Cr), nickel (Ni), neodymium (Nd), tungsten (W), and gold (Au) or alloys thereof, but the embodiments of the present disclosure are not limited thereto.

[0139] The third insulating layer 42 may be disposed on the bridge electrode 410. The touch electrodes 420 respectively disposed on the third insulating layer 42 may be connected to the bridge electrode 410 via contact holes formed at the third insulating layer 42. For example, the third insulating layer 42 may be an insulating layer disposed at the touch portion 4000, and thus it may be a layer that insulates the touch signal, but the embodiments of the present disclosure are not limited thereto. For example, the third insulating layer 42 may be made of a silicon nitride (SiN x ) or silicon oxide (SiO x ), but the embodiments of the present disclosure are not limited thereto.

[0140] The touch electrode 420 may be disposed on the third insulating layer 42. The touch electrode 420 may be connected to a touch circuit disposed in a flexible PCB (FPCB) by being connected to a plurality of touch lines disposed in the non-display area NA.

[0141] The touch circuit may supply a touch driving signal to the touch electrode 420 to drive a touch operation, detect a touch sensing signal from the touch electrode 420 , and determine a touch event and / or a touch position (coordinates) based on the touch sensing signal.

[0142] The touch electrode 420 may be made of a single layer or multiple layers containing silver (Ag), molybdenum (Mo), copper (Cu), titanium (Ti), aluminum (Al), chromium (Cr), nickel (Ni), neodymium (Nd), tungsten (W), and gold (Au) or alloys thereof, but the embodiments of the present disclosure are not limited thereto. For example, the touch electrode 420 and the bridge electrode 410 may be disposed at positions corresponding to the bank 21 and the spacer 22.

[0143] The third passivation layer 43 and the fourth passivation layer 51 may be disposed on the touch electrode 420 .

[0144] The third passivation layer 43 and the fourth passivation layer 51 may extend to a region where a connection portion between a flexible PCB (FPCB) provided in the non-display area NA and the substrate 101 is provided.

[0145] The third passivation layer 43 and the fourth passivation layer 51 may be made of silicon nitride (SiN x ) or silicon oxide (SiO x ) or an organic insulating material such as BCB (benzocyclobutene), acrylic resin, epoxy resin, phenolic resin, polyamide resin, and polyimide resin, but the embodiments of the present disclosure are not limited thereto.

[0146] The color filters 520_R, 520_G, and 520_B and the black matrix 510 may be disposed on the fourth passivation layer 51. For example, the color filters 520_R, 520_G, and 520_B and the black matrix 510 may be disposed to correspond to the sub-pixels.

[0147] The display device according to an embodiment of the present disclosure may include a color filter unit 5000 on the touch unit 4000 instead of the optical control layer. For example, the optical control layer may be a polarizing film. The polarizing film may prevent light entering from outside the display panel from being reflected by the cathode 230 between the sub-pixels PX, thereby improving the visibility of the display device. However, when passing through the polarizing film, the brightness of the light may be reduced by about 50%, so that the light efficiency may be reduced or degraded. In order to increase the brightness of the light provided from the display device, more current for driving the light-emitting element should be applied to the light-emitting unit 2000, so this may lead to an increase in power consumption. In order to solve this problem, for example, a color filter unit 5000 may be provided instead of a polarizing film. Therefore, power consumption can be reduced, and a display device with a thin thickness can be provided. According to another embodiment of the present disclosure, a polarizing film may be provided instead of the color filter unit 5000, but is not limited thereto.

[0148] FIG. 3A to FIG. 3C is a perspective view showing a display device according to an embodiment of the present disclosure.

[0149] Reference FIG. 3A to FIG. 3C, the display device 10000 according to an embodiment of the present disclosure may include a display area AA and a non-display area NA.

[0150] The display area AA may be an area for presenting a video image. The non-display area NA may be disposed around the display area AA and may be an area where a video image is not displayed.

[0151] Depending on whether the shape can be changed or varied, the display device 10000 may include a variable area VA and a non-variable area NVA1. For example, the term "variable" may include the terms "folding", "bending" or "flexible", but the embodiments of the present disclosure are not limited thereto. For example, "variable" may include a structure from a fully folded state to a state bent at a few nanometers. For example, depending on the folded or bent state, the display device 10000 may include a variable area VA and a non-variable area NVA1. The display device 10000 may include a foldable display device, a bendable display device, a curved display device, a variable display device or a flexible display device, but the embodiments of the present disclosure are not limited thereto. Here, the display device 10000 is illustrated in the case of a folding display device, but the embodiments of the present disclosure are not limited thereto.

[0152] The variable area VA may be an area that bends when the display device 10000 is folded. For example, the variable area VA may be a folding area. For example, the variable area VA may be folded according to a specific radius of curvature relative to the folding axis FA. For example, the folding axis FA of the variable area VA may be defined along the X-axis, and the non-variable area NVA1 may extend from the variable area VA in a Y-axis direction perpendicular to the folding axis FA. When the variable area VA is folded with the folding axis FA as a reference, the variable area VA may form a part of a circle or an ellipse. The radius of curvature of the variable area VA may be the radius of a circle or an ellipse formed by the variable area VA, but the embodiments of the present disclosure are not limited thereto.

[0153] The non-variable area NVA1 may be an area that is not folded when the display device 10000 is folded. For example, when the display device 10000 is folded, the non-variable area NVA1 may maintain a flat state. The non-variable area NVA1 may be disposed on both sides of the variable area VA, but the embodiments of the present disclosure are not limited thereto. For example, the non-variable area NVA1 may be an area that extends from the variable area VA to the Y-axis direction with the folding axis FA as a reference. In this case, the variable area VA may be disposed between two non-variable areas NVA1. For example, when the display device 1000 is folded with the folding axis FA as a reference, the non-display areas NVA1 may overlap with each other. For example, the non-variable area NVA1 may overlap with some portions of the display area AA and some portions of the non-display area NA.

[0154] For example, when the upper surface of the display device 10000 on which an image is displayed is referred to as a display surface, and the lower surface of the display device 10000 which is the opposite side of the display surface is referred to as a back surface, the variable area VA can be folded in one of the following two ways; one is that the display surface of the display device 10000 is folded into an external folding type exposed to the outside, and the other is that the display surface of the display device 10000 is folded into an internal folding type facing each other, but the embodiments of the present disclosure are not limited to this.

[0155] For example, the variable area VA may be an area bent to a predetermined curvature when the display device 10000 is folded in at least one of an inward folding type and an outward folding type. An area other than the non-variable area NVA1 may be the variable area VA.

[0156] The display device 10000 may further include a hinge structure for folding the display panel and a housing for supporting and storing the display panel. The variable area VA and the non-variable area NVA1 may be applied to other elements of the display device 10000 in the same manner.

[0157] Reference FIG. 3A to FIG. 3C , the display device 10000 may include a first housing 41 and a second housing 42. The first housing 41 and the second housing 42 may be rotatably combined by a connecting member 45. For example, a hinge may be formed on the side of the first housing 41. The connecting member 45 may be disposed on the side of the second housing 42. The hinge formed on the side of the first housing 41 may be rotatably connected to the connecting member 45 disposed on the side of the second housing 42. The connecting member 45 may include a hinge, but the embodiments of the present disclosure are not limited thereto. For another example, the connecting member 45 may be integrally formed with the first housing 41 or the second housing 42.

[0158] Reference Figure 3A , which can have an expanded state in which the upper surface of the first shell 41 and the upper surface of the second shell 42 can be located on a plane with the connecting member 45 as a reference. Figure 3A In the example Figure 3A In the fully unfolded state shown, the display surface 105a can form a plane covering the upper surface of the first housing 41 and the upper surface of the second housing 42. Figure 3B , the display surface 105a of the display device 10000 can start to fold in half, and the two surface portions of the display surface 105a face each other. For example, it can have an unfolded state in which the first shell 41 and the second shell 42 are inclined at a predetermined angle θ. Figure 3CThe first housing 41 and the second housing 42 may be folded to face each other at a predetermined angle θ based on the connection member 45. The angle θ between the first housing 41 and the second housing 42 may be a right angle, an obtuse angle, or an acute angle, but the embodiments of the present disclosure are not limited thereto.

[0159] When the display device 10000 is folded, the display surface 105a corresponding to the display area AA provided on the upper surface of the first shell 41 and the second shell 42 can be closed inside and hidden from the outside. For example, when the display device 10000 is folded, the display device 10000 can disable the display area AA corresponding to the display surface 105a. Activation (or enabling) can represent displaying a video image on a screen corresponding to the display area AA. Alternatively, activation can represent that the display device 10000 changes from a dormant state to an activated state. The display area AA corresponding to the edge of the first shell 41 and the edge of the second shell 42 can be disabled. Disabling (or deactivation) can represent turning off the screen corresponding to the display area AA. Alternatively, disabling can represent not powering the sub-pixels of the pixels corresponding to the display area AA that will display the picture. In addition, disabling can represent that the display device 10000 enters a dormant state from an activated state.

[0160] According to another embodiment of the present disclosure, Figure 3C As shown, the back display surface 105b corresponding to the upper surface of the first housing 41 in the display area AA can be set on the lower surface of the first housing 41. The back display area can be set on the back display surface 105b. For this case, in the folded state of the display device 10000, the back display surface 105b corresponding to the back display area can be exposed to the outside. For example, in the folded state, the display device 10000 can activate the back display area corresponding to the back display surface 105b. In the unfolded state, the display surface 105a and / or the back display surface 105b can be activated. The display surface 105a and the back display surface 105b can be linked to display the same image, but the embodiments of the present disclosure are not limited to this.

[0161] Figure 4 is a cross-sectional view showing a display device according to an embodiment of the present disclosure.

[0162] Reference Figures 2 to 4 The display device 10000 according to an embodiment of the present disclosure may include a display panel 100. The display panel 100 according to an embodiment of the present disclosure may include a transistor part 1000, a light emitting part 2000, an encapsulation part 3000, a touch part 4000 and / or a color filter part 5000.

[0163] The transistor unit 1000 may be disposed on the substrate 101. The light emitting unit 2000 may be disposed on the transistor unit 1000. The encapsulation unit 3000 may be disposed on the light emitting unit 2000. The touch unit 4000 and the color filter unit 5000 may be disposed on the encapsulation unit 3000. Figure 2 The display panel 100 may include a transistor unit 1000, a light emitting unit 2000, an encapsulation unit 3000, a touch unit 4000, and a color filter unit 5000, but the embodiments of the present disclosure are not limited thereto. In addition, a cover layer 52 may be further provided on the color filter unit 5000 to protect all the components thereunder.

[0164] The display panel 100 having flexibility may be difficult to maintain its shape in a constant form when the display device 10000 is folded or bent, and may be susceptible to external shocks and / or stimulation. Therefore, various types of support members may be provided on the back of the display panel or the transistor unit 1000. For example, at least one plate may be provided below the display panel 100 or the transistor unit 1000. For example, the first plate 600, the second plate 620, and the third plate 630 may be provided below the display panel 100 or the transistor unit 1000, but the embodiments of the present disclosure are not limited thereto. For example, the transistor unit 1000 may be formed on at least one plate.

[0165] When the substrate 101 made of flexible plastic is applied, the thickness of the substrate 101 may be very thin, so the display panel 101 may sag when being folded or bent. In order to prevent the display panel from sagging, a third plate 630 may be provided on the back of the display panel 100 or the transistor part 1000. For example, the third plate 630 may be a back plate or a support plate, but is not limited to these terms.

[0166] The first plate 600 can enhance the rigidity of the substrate 101 and the second plate 620 formed of a plastic material. For example, the first plate 600 can be made of a metal material having excellent thermal conductivity. For example, the first plate 600 can be made of a metal material such as stainless steel (SUS), carbon fiber reinforced plastic (CFRP), invar, aluminum (Al) and magnesium (Mg), but the embodiments of the present disclosure are not limited thereto. For example, since the metal material has a higher strength than the plastic material, the durability of the display device 10000 can be improved. According to an embodiment of the present disclosure, the first plate 600 may include graphite or a plastic such as polycarbonate (PC).

[0167] The first plate 600 may include at least one opening pattern (or opening) OP. For example, at least one opening pattern OP may be provided to correspond to the variable area VA. At least one opening pattern OP may enable the first plate 600 of the variable area VA to be easily folded, and may effectively alleviate the stress applied to the first plate 600 during the folding action. In addition, the folding characteristics of the display device 10000 are improved by promoting recovery when folding and unfolding.

[0168] At least one opening pattern OP may extend in a direction parallel to the folding axis FA and may be configured in a discontinuous form. The width of each opening pattern OP may be smaller than the length of the first plate 600 along the folding axis FA direction. The shape and arrangement method of the opening pattern OP may not be limited to Figure 4 The shape and arrangement method shown. The gap between the opening patterns OP adjacent to each other in the direction perpendicular to the folding axis FA may be constant, but the embodiments of the present disclosure are not limited thereto. For example, each opening pattern OP may be configured into a specific shape, but the embodiments of the present disclosure are not limited thereto. For example, the opening patterns OP may be formed in different shapes or arranged at different intervals in the variable area VA, but the embodiments of the present disclosure are not limited thereto. For example, the gap between the opening patterns OP adjacent to each other in the direction perpendicular to the folding axis FA may widen as the distance from the folding axis FA increases. The opening patterns OP adjacent to each other in the direction perpendicular to the folding axis FA may have a first gap at the central portion close to the folding axis FA, and a second gap larger than the first gap at the two outer portions of the central portion. For example, each opening pattern OP may have an elliptical shape, a rectangular shape, a diamond shape, a circular shape, a slit shape, etc., but the embodiments of the present disclosure are not limited thereto. In some embodiments, the opening pattern OP may be arranged only in the variable area VA, but the embodiments of the present disclosure are not limited thereto.

[0169] In one embodiment, at least one opening pattern OP may be provided in the variable area VA and the non-variable area NVA1 , but embodiments of the present disclosure are not limited thereto.

[0170] Referring to the embodiment of the present disclosure FIG. 3A to FIG. 3C , the variable area VA may be disposed at the central portion of the display device 10000, but the location of the variable area VA may not be limited thereto. For example, more than two variable areas VA may be defined.

[0171] The second plate 620 may be disposed on the first plate 600. For example, the second plate 620 may enhance the rigidity of the display panel 100 and / or the transistor portion 1000. The second plate 620 may be made of a material different from that of the first plate 600. For example, the second plate 620 may be made of a polymer that blocks ultraviolet rays. For example, the second plate 620 may be made of black polyethylene terephthalate (PET), but the embodiments of the present disclosure are not limited thereto. The first plate 600 may represent a lower plate, and the second plate 620 may represent an upper plate, but these terms are not limited.

[0172] The display device 10000 may further include at least one adhesive. For example, at least one adhesive may be disposed between the boards. For example, at least one adhesive may include a first adhesive 701, a second adhesive 703, and a third adhesive 705, but the embodiments of the present disclosure are not limited thereto. The first adhesive 701 may be disposed between the first board 600 and the second board 620. The second adhesive 703 may be disposed between the second board 620 and the third board 630. The third adhesive 705 may be disposed between the third board 630 and the transistor portion 1000. The third adhesive 705 may be disposed between the third board 630 and the display panel 100. For example, the first adhesive 701 may cover at least one opening pattern OP of the first board 600. For example, the first adhesive 701, the second adhesive 703, and the third adhesive 705 may be at least one third adhesive, but the term is not limited thereto.

[0173] The first adhesive 701 , the second adhesive 703 , and the third adhesive 705 may include at least one of an optically clear adhesive (OCA), a pressure sensitive adhesive (PS), and an optically clear resin (OCR).

[0174] In some embodiments, the second plate 620 and the first adhesive 701 may have a greater width extending to the left and right sides than the layers stacked thereon. For example, the width of the second plate 620 from the left end side to the right end side may be wider than the width of the display panel 100 from the left end side to the right end side.

[0175] In some embodiments, the first plate 600 may have a greater width extending to the left and right sides than the layers stacked thereon. For example, the width of the first plate 600 may be wider than the width of the second plate 620. Figure 4 , at least one cover member may be disposed on the display panel 100. The at least one cover member may include a first cover member 710, a second cover member 720, and a third cover member 730, but embodiments of the present disclosure are not limited thereto. For example, the cover member may be a front member, a cover window, or a window cover, but embodiments of the present disclosure are not limited thereto.

[0176] At least one cover member may be disposed on the display panel 100. For example, the first cover member 710 may be disposed on the color filter part 5000. The second cover member 720 may be disposed on the first cover member 710. The third cover member 730 may be disposed on the second cover member 720. For example, at least one of the first cover member 710, the second cover member 720, and the third cover member 730 may protect the display device 10000 including the light emitting part 2000 from damage by external impact or from degradation by moisture, oxygen, or foreign matter intruding from the outside.

[0177] At least one of the first cover member 710, the second cover member 720, and the third cover member 730 may be made of a transparent material having excellent impact resistance and scratch resistance. For example, at least one of the first cover member 710, the second cover member 720, and the third cover member 730 may include a film made of a polymer such as polyimide, polyamide, polyethylene terephthalate, polymethyl methacrylate, polypropylene glycol, and polycarbonate, but the embodiments of the present disclosure are not limited thereto. For another example, at least one of the first cover member 710, the second cover member 720, and the third cover member 730 may include a film made of an optically isotropic polymer such as cycloolefin (co)polymer, optically isotropic polycarbonate, and optically isotropic polymethyl methacrylate, but the embodiments of the present disclosure are not limited thereto. For another example, at least one of the first cover member 710, the second cover member 720, and the third cover member 730 may include a film made of chemically strengthened laminated glass.

[0178] In the case where the third cover member 730 is made of a thin glass substrate, a protective film may be provided on the third cover member 730 to prevent glass from splashing when the third cover member 730 is damaged or broken.

[0179] The display device according to the embodiment of the present disclosure may include, for example, a hole area. The hole area may be disposed around the display area AA. The hole area may be disposed at the periphery of the substrate 101.

[0180] For example, the hole area may be provided at some parts of at least one plate and at least one cover member. For example, the hole area may be provided at some parts of at least one plate including the first plate 600, the second plate 620, and the third plate 630 and at some parts of at least one cover member including the first cover member 710, the second cover member 720, and the third cover member 730. For example, the hole area included in at least one of the first plate 600, the second plate 620, and the third plate 630 may be an empty and transparent area. When Figure 4When the display device 10000 shown has a hole area, it may be referred to as UDC (under-screen camera) or HID (in-screen punch hole), but is not limited to these terms. For example, in the hole area, the display elements may be sparsely arranged in the transparent area, so that the camera placed below the hole area can receive light from the outside. For example, at least one of the camera, the optical sensor, and / or the optical element may be arranged at the hole area, but the embodiments of the present disclosure are not limited thereto. For example, the optical sensor may be an infrared sensor, but the embodiments of the present disclosure are not limited thereto.

[0181] Reference Figure 4 , at least one adhesive may be provided in the display device 10000. For example, at least one adhesive may be provided between the cover members. For example, at least one adhesive may be provided between the cover members in the display area AA. At least one adhesive may include a fourth adhesive 901, a fifth adhesive 903, and a sixth adhesive 905, but the embodiments of the present disclosure are not limited thereto. For example, the fourth adhesive 901 may be provided between the display panel 100 and the first cover member 701. For example, the fifth adhesive 903 may be provided between the first cover member 710 and the second cover member 720. For example, the sixth adhesive 905 may be provided between the second cover member 720 and the third cover member 730. The fourth adhesive 901, the fifth adhesive 903, and the sixth adhesive 905 may be at least one of the first adhesives, but are not limited to these terms. In addition, the optical layer 722 may be further provided on the second cover member 720, but is not limited thereto, and the optical layer 722 may be provided on the first cover member 710 or the third cover member 730. For example, the optical layer 722 may be a layer for suppressing reflection of external light.

[0182] The fourth adhesive 901 , the fifth adhesive 903 , and the sixth adhesive 905 may include an optically clear adhesive (OCA), a pressure sensitive adhesive (PSA), or an optically clear resin OCR.

[0183] Figure 5 is a perspective view showing the rear side of the display device in the unfolded state according to the embodiment of the present disclosure.

[0184] Figure 6 It is shown Figure 5 A perspective view of the display device in a folded state is shown.

[0185] Figure 7 It is along Figure 6 Cross-sectional view along cutting line II-II'.

[0186] Reference Figures 5 to 7, the display device 10000 according to one embodiment of the present disclosure may include a flexible display module 7000 and a first board 600. Here, the display module 7000 may be a flexible display module.

[0187] The display module 7000 according to an embodiment of the present disclosure may include Figure 4 The elements shown from the first adhesive 701 to the third cover member 730 can be obtained from Figure 4 Some components can be omitted from the configuration, or additional components can be added to Figure 4 , but the embodiments of the present disclosure are not limited thereto.

[0188] Reference Figures 5 to 7 , the first plate 600 may be disposed below the lower surface of the display module 7000. For example, the display module 7000 may include a Figure 4 For example, the first plate 600 may be the same as that in the above reference Figure 4 The first plate 600 described is the same.

[0189] The display device 10000 according to an embodiment of the present disclosure may further include a housing for accommodating the display module 7000 and the first board 600 , and a hinge.

[0190] The display module 7000 may include a display surface 7001 and a non-display surface 601 corresponding to the display surface 7001. The display module 7000 may provide a video image in the direction of the display surface 7001. The non-display surface 601 may be a surface on which no video image is provided.

[0191] The display module 7000 may include a flexible substrate made of a flexible plastic material. Therefore, the display module 7000 can be freely folded or unfolded within a certain angle range.

[0192] The first plate 600 may be disposed below the display module 7000. The rigidity of the first plate 600 may be harder than that of the display module 7000, and thus the first plate 600 may support the display module 7000. For example, the first plate 600 may prevent the display module 7000 from being deformed due to a user's touch or an external force. The first plate 600 may include nobinite, stainless steel, invar, or an alloy thereof. The thickness of the first plate 600 according to an embodiment of the present disclosure may be in the range of 130 μm (micrometers) to 170 μm. For example, the thickness of the first plate 600 may be 150 μm. Figure 4 In an embodiment, in order to allow the first plate 600 to stably support the display module 7000 , the first plate 600 may be thicker than at least one of the layers thereon. For example, the first plate 600 may be thicker than the second plate 620 .

[0193] The display module 7000 may include a variable area VA and a non-variable area NVA1, wherein the non-variable area NVA1 may be arranged on both sides of the variable area VA. For example, the variable area VA may include a first area VA1, a second area VA2, and a first link area C1. The second area VA2 may be arranged on both sides of the first area VA1 and separated from the first area VA1 by a distance corresponding to the first link area C1. The first link area C1 is arranged between the first area VA1 and the second area VA2. For example, the non-variable area NVA1 may include a third area FP and a second link area C2. The third area FP may be arranged to be separated from the second area VA2 by a distance corresponding to the second link area C2. The second link area C2 may be arranged between the second area VA2 and the third area FP.

[0194] When the display module 7000 is folded, Figure 6 As shown, the display module 7000 may have a curved surface at the first area VA1. For example, when the display module 7000 is folded, the display module 7000 may be bent at the first area VA1 with a first radius of curvature R1. For example, when the display module 7000 is folded, the center of curvature at the first area VA1 of the display module 7000 may be set at the first center of curvature RC1.

[0195] According to an embodiment of the present disclosure, an inner folding structure may be formed at the first area VA1, and an outer folding structure may be formed at the second area VA2. Therefore, when the display device is repeatedly folded and unfolded, wrinkles or folding lines may be prevented from occurring in the variable area VA.

[0196] When the display module 7000 is folded, the display module 7000 may have a curved surface at the second area VA2. For example, when the display module 7000 is folded, the display module 7000 may have a second radius of curvature R2 at the second area VA2. According to an embodiment of the present disclosure, the display device 10000 may have at least one radius of curvature, that is, including a first radius of curvature R1 and a second radius of curvature R2. For example, the first radius of curvature R1 may be different from the second radius of curvature R2. For example, the first link area C1 may be an area for connecting the first area VA1 with the second area VA2 having different radii of curvature. For another example, the second radius of curvature R2 may be the same as the first radius of curvature R1. For example, when the display module 7000 is folded, the center of curvature at the second area VA2 may be set at the second center of curvature RC2. The second center of curvature RC2 may be located in the direction of the non-display surface 601 of the display module 7000.

[0197] For example, refer to Figure 7When the display device 10000 is folded, the shape of the folded portion may be expressed as a water drop structure (or shape), a tear drop structure, a bottle (jar) structure, or an ω structure, but the embodiments of the present disclosure are not limited thereto.

[0198] When the display module 7000 is folded, the display module 7000 and / or the first plate 600 may have a flat surface at the non-variable area NVA1.

[0199] When the display module 7000 is folded, the display module 7000 and / or the first plate 600 may have a flat surface at the second link region C2 and the third region FP. In addition, when the display module 7000 is folded, the display module 7000 may have a curved surface at the second link region C2.

[0200] In an embodiment, the display device 10000 may include a support member attached below the first plate 600. The support member may be connected to the housing and the hinge. For example, the support member may have relatively high rigidity compared to other elements.

[0201] When the display device 10000 is unfolded after being folded, a repulsive force may be generated at a portion of the first plate 600 overlapping the variable area VA having the curvature. For example, when the display device 10000 is unfolded after being folded, a repulsive force may be generated at some portions of the first plate 600 overlapping the second area VA2 and the first area VA1, respectively.

[0202] According to an embodiment of the present disclosure, the second radius of curvature R2 may be greater than the first radius of curvature R1. When a repulsive force is generated at the first plate 600, wrinkles may occur at the display device 10000. For example, when the display device 1000 is unfolded after being folded, each of the first area VA1 and the second area VA2 may have wrinkles.

[0203] In an embodiment of the present disclosure, when the display module 7000 is folded, the first curvature center RC1 may be located in the direction of the display surface 7001 of the display module 7000 , and the second curvature center RC2 may be located in the direction of the non-display surface 601 of the display module 7000 .

[0204] In order to reduce the repulsive force of the first plate 600 and improve the flexibility, at least one opening pattern OP may be formed in the first plate 600. By using the opening pattern OP in the first plate 600, the flexibility of the first plate 600 may be increased, so that the repulsive force may be reduced. The first plate 600 may include a plurality of opening patterns OP penetrating the first plate 600. At least one opening pattern OP may enhance the flexibility of the first plate 600. Therefore, when the display device 10000 is folded and then unfolded, wrinkles may not occur in the variable area VA, or the depth of the wrinkles may be relatively small.

[0205] In order to enhance the flexibility of the first plate 600, the thickness of the first portion of the first plate 600 overlapping the variable area VA may be thinner than the thickness of the second portion of the first plate 600 overlapping the non-variable area NVA1. For another embodiment, the thickness of the portion of the first plate 600 overlapping the first link area C1 may be the same as the thickness of the portion of the first plate 600 overlapping the non-variable area NVA1. As the thickness of the first plate 600 becomes thinner, the flexibility may increase and the repulsive force may decrease. The rigidity of the first plate 600 may increase as the thickness increases.

[0206] Figure 8 It is shown Figure 5 Magnified view of the "A" area. Figure 8 yes Figure 5 An enlarged view of a region including at least one opening pattern OP.

[0207] Fig. 9 It is shown Figure 8 Magnified view of the "B" area.

[0208] Fig. 10A The present invention is a diagram showing an embodiment of the present invention. Figure 8 An enlarged view of a first area of ​​the plate is shown.

[0209] Fig. 10B The present invention is a diagram showing an embodiment of the present invention. Figure 8 An enlarged view of the first link area of ​​the plate is shown.

[0210] Fig. 10C The present invention is a diagram showing an embodiment of the present invention. Figure 8 An enlarged view of a second area of ​​the plate is shown.

[0211] Fig. 10D The present invention is a diagram showing an embodiment of the present invention. Figure 8 An enlarged view of the second link area of ​​the plate is shown.

[0212] Reference Figures 5 to 8 , at least one plate (e.g., the first plate 600) may include a non-variable area NVA1 and a variable area VA. For ease of explanation, at least one plate is referred to as a first plate, but according to an embodiment of the present disclosure, the second plate and the third plate may also have the same structure and / or features as the first plate. The non-variable area NVA1 may include a display area. For example, the folding axis FA may be defined or set in the central portion of the first plate 600. For example, the folding axis FA may be included in the variable area VA. For example, the non-variable area NVA1 may be set on both sides of the variable area VA.

[0213] For example, the variable area VA may include a first area VA1, a first link area C1, and a second area VA2. The first area VA1 may have a folding axis FA. The first link area C1 may be disposed on both sides of the first area VA1. The second area VA2 may be disposed on both sides of the first area VA1 and the first link area C1 may be between the second area VA2 and the first area VA1.

[0214] For example, the non-variable area NVA1 may include a second link area C2 and a third area FP. The second link area C2 may be connected to the second area VA2 or extended from the second area VA2. The third area FP may be connected to the second link area C2 or extended from the second link area C2. For example, the second link area C2 and / or the third area FP may maintain a flat state.

[0215] For example, the first area VA1 may have a first curvature radius R1 and may be bent in a first direction. The second area VA2 may have a second curvature radius R2 different from the first curvature radius R1 and may be bent in a second direction different from the first direction.

[0216] For example, the second radius of curvature R2 may be greater than the first radius of curvature R1 ( R2 > R1 ), and the second direction may be perpendicular to the first direction.

[0217] At least one plate (eg, first plate 600 ) may have at least one opening pattern OP. For example, at least one opening pattern OP may be formed or included in the plate to improve deformability, foldability, flexibility, and recovery characteristics of first plate 600 .

[0218] The opening pattern OP may have a length extending in a direction parallel to the folding axis FA. For example, the opening pattern OP may have a major axis and a minor axis, and the major axis may be arranged to be parallel to the direction of the folding axis FA. The opening pattern OP may have a width along the minor axis perpendicular to the folding axis FA. Two opening patterns OP may be arranged to have a predetermined gap.

[0219] A plurality of opening patterns OP may be arranged in the variable area VA and / or the non-variable area NVA1. Each opening pattern OP may have a length parallel to the direction of the folding axis FA and a width perpendicular to the direction of the folding axis FA. A plurality of opening patterns OP may be arranged to be spaced apart from each other by gaps. The embodiments of the present disclosure are not limited thereto.

[0220] Portions of the plurality of opening patterns OP may be filled with at least one of polyurethane (PU), thermoplastic polyurethane (TPU), polyacrylate, rubber, and silicon (Si). The embodiments of the present disclosure are not limited thereto.

[0221] At least one opening pattern OP may also be provided in the second link region C2 of the non-variable region NVA1 (as an outer region of the variable region VA).

[0222] Reference Figures 8 to 9 , at least one opening pattern OP may be arranged to be spaced apart by a horizontal gap HD along a direction perpendicular to the folding axis FA. At least one opening pattern OP may be arranged to be spaced apart by a vertical gap VD along a direction of the folding axis FA.

[0223] For example, the first area VA1 may be an inner folding (or positive folding) area that changes (or folds or bends) in the direction of the display surface 7001 .

[0224] For example, the second area VA2 may be an outer folding (or negative folding) area that changes (or folds or bends) in the direction of the non-display surface 601 .

[0225] For example, the third region FP may be a flat region.

[0226] Since the curvature or characteristics of each region may be different, it may be necessary to improve the boundary visibility. According to an embodiment of the present disclosure, the density per unit area of ​​the opening pattern OP may decrease from the folding axis FA to the variable region VA and from the variable region VA to the non-variable region NVA1. Therefore, flexibility can be ensured in the variable region VA, and rigidity can be ensured in the non-variable region NVA1.

[0227] According to an embodiment of the present disclosure, the horizontal gap HD of the opening pattern OP may gradually increase from the first area VA1 to the second link area C2. For example, the horizontal gap HD of the opening pattern OP may gradually increase as it extends from the folding axis FA to the non-variable area NVA1 along the horizontal direction.

[0228] For example, the horizontal gap HD of the opening pattern OP may have the minimum value in the first area VA1.

[0229] For example, the horizontal gap HD of the opening pattern OP may have a maximum value in the second link region C2 or the second area VA2.

[0230] Reference Figures 8 to 10D , for example, the horizontal gap HD of the opening pattern OP may have a first horizontal gap A-H2 in the first area VA1, and have a second horizontal gap B-H2 wider than the first horizontal gap A-H2 in the first link area C1.

[0231] For example, the horizontal gap HD of the opening pattern OP may have a third horizontal gap C-H2 wider than the second horizontal gap B-H2 in the second area VA2. The horizontal gap HD of the opening pattern OP may have a fourth horizontal gap D-H2 wider than the third horizontal gap C-H2 in the second link area C2.

[0232] In one embodiment, the horizontal gaps A-H2, B-H2, C-H2, and D-H2 of the opening pattern OP may be the same in each region. In another embodiment, the horizontal gaps A-H2, B-H2, C-H2, and D-H2 of the opening pattern OP may gradually increase as the distance from the folding axis FA increases.

[0233] For example, the first horizontal gap A-H2 of the opening pattern OP may be the same within the first area VA1, or may gradually increase with increasing distance from the folding axis FA.

[0234] For example, the second horizontal gap B-H2 of the opening pattern OP may be the same within the first link region C1, or may gradually increase with increasing distance from the folding axis FA.

[0235] For example, the third horizontal gap CH2 of the opening pattern OP may be the same within the second area VA2, or may gradually increase as the distance from the folding axis FA increases.

[0236] For example, the fourth horizontal gap D-H2 of the opening pattern OP may be the same within the second link region C2, or may gradually increase as the distance from the folding axis FA increases.

[0237] In one embodiment, the vertical gaps A-V2, B-V2, C-V2, and D-V2 of the opening pattern OP may gradually increase from the first area VA1 to the second link area C2. For example, the vertical gaps A-V2, B-V2, C-V2, and D-V2 of the opening pattern OP may gradually increase as they extend from the folding axis FA to the non-variable area NVA1 along the horizontal direction.

[0238] For example, the density per unit area of ​​the opening pattern OP may gradually decrease in a direction from the first area VA1 to the second link area C2 .

[0239] For example, as the distance from the folding axis FA in the horizontal direction of the non-variable area NVA1 increases, the density per unit area of ​​the opening pattern OP may gradually become lower.

[0240] For example, the width A-H1 of the opening pattern OP in the vertical direction of the folding axis FA may be the same in all regions. The maximum value of the width A-H1 may be twice (200%) the thickness of the first plate 600. The embodiments of the present disclosure are not limited thereto.

[0241] For example, the vertical gaps A-V2, B-V2, C-V2, and D-V2 of the opening pattern OP may be the same in each region, or may gradually increase with increasing distance from the folding axis FA.

[0242] For example, the first vertical gap A-V2 of the opening pattern OP may be the same within the first area VA1, or may gradually increase as the distance from the folding axis FA increases.

[0243] For example, the second vertical gap B-V2 of the opening pattern OP may be the same within the first link region C1, or may gradually increase as the distance from the folding axis FA increases.

[0244] For example, the third vertical gap C-V2 of the opening pattern OP may be the same within the second area VA2, or may gradually increase with increasing distance from the folding axis FA.

[0245] For example, the fourth vertical gap D-V2 of the opening pattern OP may be the same within the second link region C2, or may gradually increase as the distance from the folding axis FA increases.

[0246] For example, at least one opening pattern OP may have a first length A-V1 in the first region, a second length B-V1 in the first link region C1, a third length C-V1 in the second region, and a fourth length D-V1 in the second link region C2. For example, each of the lengths A-V1, B-V1, C-V1, and D-V1 of the opening pattern OP parallel to the folding axis FA may have the same length in each region, or may gradually increase with increasing distance from the folding axis FA.

[0247] For example, the lengths A-V1, B-V1, C-V1, and D-V1 of the opening pattern OP may be the same, or may gradually become smaller from the variable area VA to the non-variable area NVA1.

[0248] For example, the first length A-V1 of the opening pattern OP may be the same within the first area VA1, or may gradually decrease as the distance from the folding axis FA increases.

[0249] For example, the second length B-V1 of the opening pattern OP may be the same within the first link region C1, or may gradually decrease as the distance from the folding axis FA increases.

[0250] For example, the third length C-V1 of the opening pattern OP may be the same within the second area VA2, or may gradually decrease as the distance from the folding axis FA increases.

[0251] For example, the fourth length D-V1 of the opening pattern OP may be the same within the second link region C2, or may gradually decrease as the distance from the folding axis FA increases.

[0252] Fig.11A According to another embodiment of the present disclosure Figure 8 Magnified view of the "B" area.

[0253] Fig. 11B According to another embodiment of the present disclosure Figure 8 Magnified view of the "B" area.

[0254] Fig. 11C According to another embodiment of the present disclosure Figure 8 Magnified view of the "B" area.

[0255] Fig.11D According to another embodiment of the present disclosure Figure 8 Magnified view of the "B" area. Figure 8 and FIG. 11A to FIG. 11D , the vertical gap VD of the opening pattern OP may be arranged at the same horizontal position (or horizontal height position) in every four to eight columns of the opening pattern OP along the horizontal direction. FIG. 10A to FIG. 10D As shown, when only one column of opening patterns OP is provided between two vertical gaps VD arranged at the same horizontal position, the vertical gaps VD are close to each other, thereby possibly causing a horizontal line perpendicular to the folding axis FA to appear.

[0256] For example, four to eight columns of opening patterns may be arranged between two adjacent columns of opening patterns having the same form of opening patterns. For example, four to eight columns of opening patterns OP each having a different form of opening patterns OP may be arranged between two vertical gaps VD arranged at the same horizontal position in the vertical direction of the folding axis FA.

[0257] For example, when a horizontal line HLN can be drawn from the first vertical gaps VD1, VD3, VD5, and VD7, the second vertical gaps VD2, VD4, VD6, and VD8 can first be located on the horizontal line HLN perpendicular to the folding axis FA. Then, at least three columns of opening patterns OP can be disposed between the first vertical gaps VD1, VD3, VD5, and VD7 and the second vertical gaps VD2, VD4, VD6, and VD8.

[0258] According to an embodiment of the present disclosure, by arranging every four or more vertical gaps VD of the opening pattern OP on the same horizontal line (or horizontal height line), the distance between two vertical gaps VD located at the same horizontal position (or horizontal height position) can be lengthened. Therefore, it is possible to prevent the occurrence of a horizontal line formed by repeatedly arranging the vertical gaps VD at short intervals at the same horizontal position.

[0259] For example, adjacent vertical gaps VD of the opening pattern OP may be arranged along a diagonal direction.

[0260] For example, the opening patterns OP of odd columns or even columns may be arranged between two adjacent vertical gaps VD arranged on the same horizontal line along the vertical direction of the folding axis. For example, the opening patterns OP of each odd column or the opening patterns OP of each even column may have the same arrangement form. In order to ensure that the vertical gaps VD are arranged as irregularly as possible, the opening patterns OP of odd columns may be arranged between two adjacent vertical gaps VD arranged on the same horizontal line, so that the opening patterns OP of each even column may have the same arrangement form.

[0261] Fig.11A According to one embodiment of the present disclosure Figure 8 Magnified view of the "B" area. Fig.11A , the opening patterns OP of every four columns may have the same arrangement pattern. For example, the opening pattern OP of the first column and the opening pattern OP of the fifth column may have the same shape or form. For example, between the first vertical gap VD1 and the second vertical gap VD2, three columns of opening patterns OP may be provided. Since the distance between the first vertical gap VD1 and the second vertical gap VD2 is longer than the case where the opening patterns OP of every two columns are repeatedly arranged in the same arrangement pattern, the horizontal line formed by the vertical gaps VD repeatedly arranged along the horizontal direction may be prevented from occurring.

[0262] For example, one column of the opening pattern OP may include a plurality of opening patterns OP arranged in parallel with the folding axis.

[0263] Reference Figures 8 to 11D For example, a plurality of opening patterns OP may be arranged at the horizontal gap HD in a direction perpendicular to the direction of the folding axis FA, and at the vertical gap VD in a direction parallel to the folding axis FA. In addition, at least three columns of opening patterns OP may be arranged between two adjacent vertical gaps VD on the same horizontal extension line in a direction perpendicular to the folding axis FA.

[0264] Fig. 11B According to another embodiment of the present disclosure Figure 8 Magnified view of the "B" area. Fig. 11B, the opening patterns OP of every five columns may have the same arrangement pattern. For example, the opening pattern OP of the first column and the opening pattern OP of the sixth column may have the same shape or form. For example, between the third vertical gap VD3 and the fourth vertical gap VD4, four columns of opening patterns OP may be provided. Since the distance between the third vertical gap VD3 and the fourth vertical gap VD4 is longer than the case where the opening patterns OP of every two columns are repeatedly arranged in the same arrangement form, the horizontal line formed by the vertical gaps VD repeatedly arranged along the horizontal direction may be prevented from occurring.

[0265] Fig. 11C According to another embodiment of the present disclosure Figure 8 Magnified view of the "B" area. Fig. 11C , the opening patterns OP of every seven columns may have the same arrangement form. For example, the opening pattern OP of the first column and the opening pattern OP of the eighth column may have the same shape or form. For example, between the fifth vertical gap VD5 and the sixth vertical gap VD6, six columns of opening patterns OP may be provided. Since the distance between the fifth vertical gap VD5 and the sixth vertical gap VD6 is longer than the case where the opening patterns OP of every two columns are repeatedly arranged in the same arrangement form, the horizontal line formed by the vertical gaps VD repeatedly arranged along the horizontal direction may be prevented from occurring.

[0266] Fig.11D According to another embodiment of the present disclosure Figure 8 Magnified view of the "B" area. Fig.11D , the opening patterns OP of every eight columns may have the same arrangement form. For example, the opening pattern OP of the first column and the opening pattern OP of the ninth column may have the same shape or form. For example, between the seventh vertical gap VD7 and the eighth vertical gap VD8, seven columns of opening patterns OP may be provided. Since the distance between the seventh vertical gap VD7 and the eighth vertical gap VD8 is longer than the case where the opening patterns OP of every two columns are repeatedly arranged in the same arrangement form, the horizontal line formed by the vertical gaps VD repeatedly arranged in the horizontal direction may be prevented from occurring.

[0267] According to the embodiments of the present disclosure, referring to Figures 8 to 11D Each of the opening patterns OP may have a length parallel to the folding axis FA and a width perpendicular to the folding axis FA, and may be arranged to be spaced apart from each other. In addition, the vertical gaps VD of the opening patterns OP are arranged along the diagonal direction.

[0268] Fig.12 It is along Figure 6 A cross-sectional view taken along a cutting line II-II' in FIG. 1 shows a display device according to another embodiment of the present disclosure.

[0269] The display device 20000 according to an embodiment of the present disclosure may include Figure 4 The components of the first plate 600 to the third cover member 730 shown. Alternatively, Figure 4 Some components are omitted from the configuration shown, or additional components may be added to Figure 4 In the configuration shown, however, the embodiments of the present disclosure are not limited thereto. Figures 5 to 11D The same configuration and its description.

[0270] The display device 20000 according to an embodiment of the present disclosure may include a board 600_2 and a display module 7000_2 stacked on an upper surface of the board 600_2. The display device 20000 may include a variable area VA2 and a non-variable area NVA2 disposed on both sides of the variable area VA2. For example, the variable area VA2 may include a first area VA3, a second area VA4, and a first link area C3 between the first area VA3 and the second area VA4. The first area VA3 may be disposed at the middle portion of the board 600_2. The second area VA4 may be located on both sides of the first area VA3 and spaced apart from the first area VA3 by a predetermined distance corresponding to the first link area C3. In addition, the variable area VA2 may include a third area VA5 and a second link area C4 between the second area VA4 and the third area VA5. The third area VA5 may be spaced apart from the second area VA4 by a predetermined distance corresponding to the second link area C4. For example, the non-variable area NVA2 may include a flat area FP and a third link area C5. The flat area FP may be located on both sides of the variable area VA2. The third link area C5 may be located between the flat area FP and the third area VA5.

[0271] Reference Fig.12 , the display device 20000 may include at least three regions having different radii of curvature from each other, for example, a first region VA3, a second region VA4, and a third region VA5. For example, the first region VA3, which may be an inner variable (or folding or bending) region, may include a first radius of curvature R3. The second region VA4, which may be an inner variable region, may include a second radius of curvature R4. The third region VA5, which may be an outer variable (or folding or bending) region, may include a third radius of curvature R5.

[0272] For example, the third radius of curvature R5 may be greater than the first radius of curvature R3 and / or the second radius of curvature R4. For example, the first radius of curvature R3 and / or the second radius of curvature R4 may be smaller than the third radius of curvature R5.

[0273] In keeping Fig.12While the water drop (or teardrop or raindrop) shape shown, it may be necessary to improve the visibility of the opening pattern at the boundary of the area where the characteristics (e.g., curvature) of the variable (folding or bending) area (e.g., the first area VA3, the second area VA4, and the third area VA5) can change. Therefore, according to an embodiment of the present disclosure, the opening pattern OP of the board 600_2 can be arranged in the first area VA3, the first link area C3, the second area VA4, the second link area C4, the third area VA5, and the third link area C5 with different densities, respectively. For example, the density per unit area of ​​the opening pattern OP can gradually decrease as it moves from the first area VA3 to the third link area C5.

[0274] For example, the density per unit area of ​​the at least one opening pattern OP may gradually decrease from the variable area VA2 to the non-variable area NVA2.

[0275] In one embodiment, the at least one opening pattern OP may include a plurality of opening patterns OP.

[0276] For example, multiple opening patterns may be arranged in a direction perpendicular to the folding axis at the horizontal gaps and in a direction parallel to the folding axis at the vertical gaps. In addition, at least three columns of opening patterns may be arranged in a direction perpendicular to the folding axis between two adjacent vertical gaps on the same horizontal extension line.

[0277] For example, four to eight columns of opening patterns may be arranged between two adjacent columns of opening patterns having the same form of opening patterns. For example, four to eight columns of opening patterns having different forms of opening patterns may be arranged between two vertical gaps VD arranged at the same horizontal position (or horizontal height position) along the vertical direction of the folding axis FA.

[0278] The display device according to the embodiment of the present disclosure can be applied to devices such as mobile devices, video phones, smart watches, watch phones, wearable devices, foldable devices, rollable devices, bendable devices, flexible devices, curved devices, sliding devices, variable devices, electronic notebooks, electronic books, portable multimedia players (PMP), personal digital assistants (PDA), MP3 players, mobile medical devices, desktop computers, laptop computers, netbook computers, workstations, navigation systems, vehicle navigation, vehicle displays, vehicle electrical appliances, cinema equipment, cinema display devices, televisions, wallpaper devices, signage devices, gaming devices, notebooks, monitors, cameras, video cameras, and home appliances. The display device according to the present disclosure can also be applied to devices such as organic LED (light emitting diode) lighting devices or inorganic LED lighting devices.

[0279] The display device according to the embodiment of the present disclosure can be explained as follows.

[0280] A display device according to an embodiment of the present disclosure may include at least one plate disposed below a display panel. In one embodiment, at least one plate may include a folding axis disposed at a central portion of the plate, a variable region including the folding axis, and a non-variable region disposed on both sides of the variable region. The variable region may include: a first region including the folding axis, a first link region disposed on both sides of the first region, a second region disposed on both sides of the first region, and the first link region between the first region and the second region. The non-variable region may include a second link region extending from the second region and a third region extending from the second link region. In one embodiment, at least one plate may be disposed at the variable region and may include at least one opening pattern, which may have a length parallel to the direction of the folding axis and a width perpendicular to the direction of the folding axis. The opening pattern may be arranged with a predetermined gap.

[0281] In an embodiment, the first region may have a first radius of curvature capable of bending in a first direction. The second region may have a second radius of curvature different from the first radius of curvature and bendable in a second direction different from the first direction.

[0282] In an embodiment, the second bending direction according to the second radius of curvature may be perpendicular to the first bending direction according to the first radius of curvature.

[0283] In an embodiment, at least one opening pattern may also be arranged in the second link region.

[0284] In an embodiment, at least one opening pattern may be arranged to have a horizontal gap along a direction perpendicular to the folding axis and may be arranged to have a vertical gap along a direction parallel to the folding axis.

[0285] In an embodiment, a horizontal gap and / or a vertical gap of the at least one opening pattern may gradually increase as it goes from the first region to the second link region.

[0286] In an embodiment, a horizontal gap and / or a vertical gap of at least one opening pattern may have a first gap in the first region and have a second gap wider than the first gap in the first link region.

[0287] In an embodiment, the horizontal gap and / or the vertical gap of the at least one opening pattern may be in the second region and have a third gap wider than the second gap, and in the second link region and have a fourth gap wider than the third gap.

[0288] In an embodiment, a horizontal gap of at least one opening pattern may have the same value over the entire area of ​​the display device. A vertical gap of at least one opening pattern may have the same value over the entire area of ​​the display device.

[0289] In embodiments, a horizontal gap and / or a vertical gap of at least one opening pattern may have a minimum value in the first region.

[0290] In embodiments, a horizontal gap and / or a vertical gap of at least one opening pattern may have a maximum value in the second link region.

[0291] In an embodiment, vertical gaps of at least one opening pattern arranged in every four or more columns of opening patterns are disposed on the same horizontal line along a direction perpendicular to the folding axis.

[0292] In an embodiment, three or more columns of opening patterns are arranged between two adjacent vertical gaps of at least one opening pattern that are disposed on the same horizontal line along a direction perpendicular to the folding axis.

[0293] In an embodiment, at least one opening pattern may be arranged in every four to eight columns of opening patterns.

[0294] In an embodiment, a density per unit area of ​​the at least one opening pattern may decrease from the first region to the second link region.

[0295] In an embodiment, at least three columns of opening patterns are arranged between two adjacent columns of opening patterns having the same form.

[0296] In an embodiment, the thickness of the portion of at least one plate overlapping the variable region may be thinner than the thickness of the portion of at least one plate overlapping the non-variable region, or may be the same as the thickness of the portion of at least one plate overlapping the non-variable region.

[0297] In an embodiment of the present disclosure, a display device may include a display panel and at least one plate below the display panel. In an embodiment, at least one plate may include: a folding axis defined at the plate, a variable region including the folding axis, and non-variable regions arranged on both sides of the variable region. The variable region may include: a first region including the folding axis, a second region spaced apart from the first region, and a third region spaced apart from the first region and the second region. The first region, the second region, and the third region may include at least three different radii of curvature from each other.

[0298] In an embodiment, at least one of the plates may include a plurality of opening patterns.

[0299] In an embodiment, unit area densities of at least one opening pattern in the first region, the second region, and the third region may be different from each other.

[0300] In an embodiment, a plurality of opening patterns may be arranged with horizontal gaps along a direction perpendicular to the folding axis, and may be arranged with vertical gaps along a direction parallel to the folding axis. At least three columns of opening patterns are disposed between two adjacent columns of opening patterns having the same form.

[0301] The features, structures, effects, etc. described in the above exemplary embodiments of the present disclosure are included in at least one exemplary embodiment of the present disclosure, and are not necessarily limited to one exemplary embodiment. In addition, the features, structures, effects, etc. described in at least one exemplary embodiment can be combined or modified by a person skilled in the art to which the present disclosure belongs for other exemplary embodiments. Therefore, such combinations and variations should be interpreted as being included in the scope of the present disclosure.

[0302] It will be apparent to those skilled in the art that various substitutions, modifications and changes may be made within the scope of the present disclosure without departing from the spirit and scope of the present disclosure. Therefore, the embodiments of the present disclosure are intended to cover various substitutions, modifications and changes of the present disclosure, as long as they are within the scope of the appended claims and their equivalents. These and other changes may be made to the embodiments in accordance with the above detailed description. In general, in the appended claims, the terms used should not be interpreted as limiting the claims to the specific example embodiments disclosed in the specification and claims, but should be interpreted as including all possible embodiments and the full range of equivalents to which these claims are entitled. Therefore, the claims are not limited by the present disclosure.

Claims

1. A display device, comprising: Display panel; as well as at least one plate, the at least one plate being disposed below the display panel, Wherein, the at least one plate comprises: a folding axis at a central portion of the plate; a variable region, the variable region including the folding axis; and a non-variable region, wherein the non-variable region is arranged on both sides of the variable region, Wherein, the variable region includes: a first region, the first region including the folding axis; first linking regions, the first linking regions being disposed on both sides of the first region; and a second area, the second area being disposed on both sides of the first area, and the first linking area being between the first area and the second area, Wherein, the non-variable region includes: a second linking area connected to the second area; and a third area, the third area being connected to the second link area, Wherein, the at least one plate includes at least one opening pattern, the at least one opening pattern is arranged in the variable area, has a length parallel to the folding axis direction and a width perpendicular to the folding axis direction, and is spaced apart by a predetermined gap.

2. The display device according to claim 1, wherein: The first region has a first radius of curvature and is bendable in a first direction, and The second region has a second curvature radius different from the first curvature radius and can be bent in a second direction different from the first direction.

3. The display device according to claim 2, wherein: The second radius of curvature is greater than the first radius of curvature, and the second direction is perpendicular to the first direction.

4. The display device according to claim 1, wherein: The at least one opening pattern is also provided in the second link region of the non-variable region.

5. The display device according to claim 4, wherein: The at least one opening pattern is arranged to have a horizontal gap along a direction perpendicular to the folding axis direction and to have a vertical gap along the folding axis direction.

6. The display device according to claim 5, wherein: At least one of the horizontal gap and the vertical gap of the at least one opening pattern gradually increases from the first region to the second link region.

7. The display device according to claim 5, wherein: The horizontal gap of the at least one opening pattern comprises: a first horizontal gap, the first horizontal gap being in the first region; and A second horizontal gap is in the first link region and is wider than the first horizontal gap.

8. The display device according to claim 7, wherein: The horizontal gap of the at least one opening pattern further comprises: a third horizontal gap in the second region and wider than the second horizontal gap; and A fourth horizontal gap is in the second link region and is wider than the third horizontal gap.

9. The display device according to claim 5, wherein: At least one of the horizontal gap and the vertical gap of the at least one opening pattern has the same value over the entire area of ​​the board.

10. The display device according to claim 5, wherein: At least one of the horizontal gap and the vertical gap of the at least one opening pattern has a minimum value in the first region.

11. The display device according to claim 5, wherein: At least one of the horizontal gap and the vertical gap of the at least one opening pattern has a maximum value in the second link region.

12. The display device according to claim 5, wherein: The vertical gaps of the at least one opening pattern arranged in every four or more columns of opening patterns are disposed on the same horizontal line along a direction perpendicular to the folding axis.

13. The display device according to claim 12, wherein: More than three rows of opening patterns are arranged between two adjacent vertical gaps of the at least one opening pattern that are arranged on the same horizontal line along a direction perpendicular to the folding axis.

14. The display device according to claim 13, wherein: The at least one opening pattern is arranged in every four to eight columns of opening patterns.

15. The display device according to claim 4, wherein: A density per unit area of ​​the at least one opening pattern gradually decreases from the first region to the second link region.

16. The display device according to claim 5, wherein: At least three columns of opening patterns are arranged between two adjacent vertical gaps of the at least one opening pattern that are arranged on the same horizontal line along a direction perpendicular to the folding axis.

17. The display device according to claim 1, wherein: The thickness of a portion of the at least one plate overlapping the variable region is thinner than or the same as the thickness of a portion of the at least one plate overlapping the non-variable region.

18. A display device comprising: Display panel; as well as at least one plate, the at least one plate being disposed below the display panel, Wherein, the at least one plate comprises: a folding axis disposed on the plate; a variable region, the variable region including the folding axis; and two non-variable regions, the two non-variable regions are respectively arranged on both sides of the variable region, Wherein, the variable region includes: a first region, the first region including the folding axis; a second region spaced apart from the first region; and a third region, the third region being spaced apart from the second region, wherein the first region, the second region and the third region include at least three different radii of curvature, and Wherein, the at least one plate comprises a plurality of opening patterns.

19. The display device according to claim 18, wherein: Unit area densities of the plurality of opening patterns in the first region, the second region, and the third region are different from each other.

20. The display device according to claim 18, wherein: The plurality of opening patterns are arranged to have horizontal intervals along a direction perpendicular to the folding axis direction and to have vertical intervals along the folding axis direction, and Wherein, at least three columns of the opening patterns are arranged between two adjacent vertical gaps arranged on the same horizontal line along a direction perpendicular to the folding axis direction.

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