Window and display device

Abstract

A window and a display device are provided. The window includes a hard coating layer including a polymer obtained from a resin composition including a photoinitiator, a fluorine-based compound, an acrylate-based compound, and a reactive diluent, and the acrylate-based compound comprises at least one of polyester acrylate, epoxy acrylate, ethyl carbamate acrylate and ethylene glycol acrylate. The reactive diluent includes at least one of a polyester acrylate and a polyether acrylate having a molecular weight greater than 0 g / mole (g / mol) and about 1000 g / mole (g / mol) or less.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and all benefits derived from Korean Patent Application No. 10-2023-0103609, filed on August 8, 2023, the contents of which are incorporated herein by reference in their entirety. Technical Field

[0003] The present disclosure herein relates to a window and a display device including the same, and more particularly, to a window having excellent folding characteristics and durability and a display device including the same. Background Art

[0004] Electronic devices of various shapes are used to provide image information. Electronic devices including foldable or bendable flexible display devices are being developed. Unlike rigid display devices, flexible display devices are foldable, rollable, and / or bendable, etc. (i.e., the flexible display device can be deformed into various shapes), and thus have portable characteristics regardless of the size of the display screen.

[0005] It is desirable that such a flexible display device has a window for protecting a display panel without hindering a folding or bending operation. Therefore, it is desirable to develop a window having not only excellent optical and mechanical properties but also excellent folding properties. Summary of the invention

[0006] The present disclosure provides a window having improved impact resistance and excellent folding characteristics and thus capable of preventing the occurrence of cracks.

[0007] The present disclosure also provides a display device having excellent durability even in a low curvature structure due to including a window having improved impact resistance and folding characteristics.

[0008] An embodiment of the present invention provides a window comprising a hard coating layer comprising a polymer obtained from a resin composition, the resin composition comprising a photoinitiator, a fluorine-based compound, an acrylate-based compound, and a reactive diluent. The acrylate-based compound comprises at least one of polyester acrylate, epoxy acrylate, urethane acrylate, and ethylene glycol acrylate, and the reactive diluent comprises at least one of polyester acrylate and polyether acrylate having a molecular weight greater than 0 and about 1000 grams per mole (g / mol) or less.

[0009] In an embodiment, the resin composition may further include an ultraviolet absorber, and the ultraviolet absorber may include at least one of a salicylic acid-based compound, a benzophenone-based compound, a benzotriazole-based compound, a cyanoacrylate-based compound, a nickel phenol-based compound, and a hindered amine-based compound.

[0010] In an embodiment, the ultraviolet absorber may include at least one of 2-(2-hydroxy-5-methylphenyl)benzotriazole, 2-(3-tert-butyl-2-hydroxy-5-methylphenyl)-2H-5-chlorobenzotriazole, 2-(2'-hydroxy-5'-trioctylphenyl)benzotriazole and 2-hydroxy-4-n-octyloxybenzophenone.

[0011] In an embodiment, the window may further include: an adhesive layer disposed below the hard coating layer; and a primer layer disposed between the adhesive layer and the hard coating layer. The primer layer may include silicon oxide and an ultraviolet absorber, and the ultraviolet absorber may include at least one of a salicylic acid-based compound, a benzophenone-based compound, a benzotriazole-based compound, a cyanoacrylate-based compound, a phenol nickel-based compound, and a hindered amine-based compound.

[0012] In an embodiment, the photoinitiator may include at least one of an acetophenone-based compound, a sulfonium-based compound, and a benzophenone-based compound.

[0013] In an embodiment, the fluorine-based compound may include perfluoropolyether.

[0014] In an embodiment, the resin composition may further include an additive represented by the following Chemical Formula 1 or Chemical Formula 2:

[0015]

Chemical formula 1

[0016]

[0017]

Chemical formula 2

[0018]

[0019] In Chemical Formula 1 and Chemical Formula 2, R 1 To R 4 Each is independently a hydrogen atom or an unsubstituted methyl group, n1 is an integer from 1 to 10, m1 and m2 are each independently an integer from 1 to 20, and the sum of m1 and m2 is 10 to 30.

[0020] In an embodiment, the acrylate-based compound may further include alkyl (meth)acrylate.

[0021] In an embodiment, the window may further include: a high refractive layer disposed on the hard coating layer and having a first refractive index of about 1.6 or more; and a low refractive layer disposed on the high refractive layer and having a second refractive index of about 1.5 or less.

[0022] In an embodiment, the high refractive layer may include tin oxide (SnO x ), titanium oxide (TiO x )、ZrO x In an embodiment, the low refractive layer may include hollow particles having an average diameter of about 30 nanometers (nm) to about 70 nm.

[0023] In an embodiment, the window may further include a functional layer disposed on the low-refractive layer and including a fluorine-containing compound.

[0024] In an embodiment, the hard coating layer may have a thickness of about 10 micrometers (μm) to about 100 μm.

[0025] In an embodiment of the present invention, a display device includes: a display panel; and a window disposed on the display panel. The window includes a hard coating layer comprising a polymer obtained from a resin composition, the resin composition including a photoinitiator, a fluorine-based compound, an acrylate-based compound, and a reactive diluent, the acrylate-based compound including at least one of polyester acrylate, epoxy acrylate, urethane acrylate, and ethylene glycol acrylate, and the reactive diluent including at least one of polyester acrylate and polyether acrylate having a molecular weight greater than 0 and about 1000 g / mol or less.

[0026] In an embodiment of the present invention, a display device includes: a display module including a first non-folding area, a folding area, and a second non-folding area arranged along a first direction; and a window arranged on the display module. The window includes: an adhesive layer directly arranged on the display module; and a hard coating layer arranged on the adhesive layer, the hard coating layer including a polymer obtained from a resin composition, the resin composition including a photoinitiator, a fluorine-based compound, an acrylate-based compound, a reactive diluent, and an ultraviolet absorber. The reactive diluent includes at least one of a polyester acrylate and a polyether acrylate having a molecular weight of about 1000 g / mol or less. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are included to provide a further understanding of the present invention and are incorporated into and constitute a part of this specification. The accompanying drawings illustrate embodiments of the present invention and together with the description serve to explain the principles of the present invention. In the drawings:

[0028] Figure 1A is a perspective view showing a deployed state of a display device according to an embodiment of the present invention;

[0029] Figure 1B It is shown Figure 1A A perspective view of the display device shown in FIG. 1 being folded inwardly;

[0030] Figure 1C It is shown Figure 1A A perspective view of the display device shown in FIG. 1 being folded outward;

[0031] Figure 2A is a perspective view showing an unfolded state of a display device according to another embodiment of the present invention;

[0032] Figure 2B It is shown Figure 2A A perspective view of the display device shown in FIG. 1 being folded inwardly;

[0033] Figure 3 is a perspective view of a display device according to another embodiment of the present invention;

[0034] Figure 4 is an exploded perspective view of a display device according to an embodiment of the present invention;

[0035] Figure 5 is a cross-sectional view of a display device according to an embodiment of the present invention;

[0036] Figure 6 is an exploded perspective view of a display device according to another embodiment of the present invention;

[0037] Figure 7 is a cross-sectional view of a display device according to an embodiment of the present invention;

[0038] Figures 8 to 11 are cross-sectional views of windows according to embodiments of the present invention; and

[0039] Fig.12 is a graph showing light transmittance of a window according to an embodiment of the present invention. DETAILED DESCRIPTION

[0040] The present invention can be implemented in various modifications and has various forms, and specific embodiments are shown in the drawings and described in detail in the text. However, it is to be understood that the present invention is not intended to be limited to the specific form disclosed, but on the contrary, it is intended to cover all modifications, equivalents and substitutes falling within the spirit and scope of the present invention.

[0041] In this specification, unless the context clearly indicates otherwise, a singular form also includes a plural form.

[0042] In this specification, it will be understood that when used in this specification, the terms "include" or "comprises" indicate the presence of stated features, integers, steps, operations, elements, components or combinations thereof, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components or combinations thereof.

[0043] In this specification, it will be understood that when an element (or region, layer, part, etc.) is referred to as being "on", "connected to" or "coupled to" another element, the element can be directly set on, directly connected to or directly coupled to the other element, or an intervening element can be set between the element and the other element.

[0044] In the present specification, terms such as "below", "lower", "above", and "upper" may be used to describe the relationship of one element to another element shown in the drawings. It will be understood that these terms have relative concepts and are described based on the orientations depicted in the drawings.

[0045] In the present specification, “disposed on” may mean not only disposed on an upper portion of a member but also disposed on a lower portion of a member.

[0046] In this specification, it will be understood that "directly disposed" means that there is no intervening layer, film, region, plate, etc. between one part and another part of the layer, film, region, plate, etc. For example, "directly disposed" may mean disposed between two layers or two members without using an additional member such as an adhesive member.

[0047] In this specification, the term "and / or" includes all combinations of one or more of the associated listed elements.

[0048] In this specification, although the terms "first", "second", etc. can be used to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, without departing from the scope of the present invention, a first element can be referred to as a second element, and similarly, a second element can also be referred to as a first element.

[0049] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present disclosure belongs. In addition, unless explicitly defined as such herein, terms (such as those defined in general dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant technical field, and should not be interpreted in an idealized or overly formalized sense.

[0050] The same reference numerals or symbols always indicate the same elements. In addition, in the drawings, in order to effectively describe the technical content, the thickness, ratio and size of the elements are exaggerated.

[0051] As used herein, "about" or "approximately" includes the stated value and is expressed as being within an acceptable range of deviation for a particular value as determined by a person of ordinary skill in the art, taking into account the measurement in question and the errors associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "approximately" may mean within one or more standard deviations, or within ±10%, ±5%, or ±2% of the stated value. Hereinafter, a window according to an embodiment of the present invention and a display device including the window will be described with reference to the accompanying drawings.

[0052] Figures 1A to 1C , Figure 2A , Figure 2B and Figure 3 They are perspective views showing a display device according to the embodiments, respectively. Figure 1A is a perspective view showing a deployed state of the display device according to the embodiment of the present invention. Figure 1B It is shown Figure 1A A perspective view of the display device shown in FIG. 1 is folded inwardly. Figure 1C It is shown Figure 1A 0 is a perspective view of a display device ED shown in FIG. 1 being folded outward.

[0053] The display device ED according to the embodiment may be activated in response to an electrical signal. For example, the display device ED may be a mobile phone, a tablet computer, a car navigation system, a game console, or a wearable device, but the embodiment of the present invention is not limited thereto. Figures 1A to 1C etc., the display device ED is exemplarily shown as a mobile phone.

[0054] exist Figure 1A In the following drawings, a first direction DR1, a second direction DR2, and a third direction DR3 are shown, and directions indicated by the first direction DR1 to the third direction DR3 described herein may have a relative concept and thus may be changed to other directions.

[0055] Reference Figures 1A to 1C , the display device ED according to the embodiment may include a display surface FS defined by a first direction DR1 and a second direction DR2 crossing the first direction DR1. The display device ED may display an image IM via the display surface FS. The display device ED according to the embodiment may display an image IM in the display surface FS parallel to each of the first direction DR1 and the second direction DR2 in a third direction DR3. Figures 1A to 1C, a clock image and application icons are exemplarily shown as an image IM. In this specification, a "display surface FS" may be referred to as a "first display surface FS", and the same reference numerals or symbols may be used for the display surface and the first display surface.

[0056] In this specification, the front surface (or upper surface) and the rear surface (or lower surface) of each of the plurality of components are defined based on the direction in which the image IM is displayed. Figure 1A and subsequent drawings (e.g., Figure 2A and Figure 3 ), the front surface (or upper surface) and the rear surface (or lower surface) of each of the multiple components constituting the display devices ED, ED-a and ED-b may be opposite to each other in the third direction DR3, and the normal direction of each of the front surface and the rear surface may be parallel to the third direction DR3. The spacing distance between the front surface and the rear surface defined along the third direction DR3 may correspond to the thickness of the component (or unit). In the present specification, the term "on a plane" may be defined as a state when observed in the third direction DR3 (in other words, "in a plan view"). In the present specification, the term "on a cross section" may be defined as a state when observed in the first direction DR1 or the second direction DR2 (in other words, "in a cross-sectional view"). The display device ED according to the embodiment may detect an external input applied from the outside. The external input may include various types of inputs applied from the outside of the display device ED. For example, in an embodiment, the external input may include not only a touch by a part of the user's body (such as a user's hand), but also an external input (e.g., hovering) applied when approaching or adjacent to the display device ED within a predetermined distance. Furthermore, the external input may be in various forms such as force, pressure, temperature, and light.

[0057] The display surface FS of the display device ED may include an active area F-AA and a peripheral area F-NAA. The active area F-AA may be activated in response to an electrical signal. The display device ED according to the embodiment may display an image IM via the active area F-AA. In addition, various types of external inputs may be detected in the active area F-AA. The peripheral area F-NAA may be adjacent to the active area F-AA. The peripheral area F-NAA may have a predetermined color. The peripheral area F-NAA may surround the active area F-AA. Therefore, the shape of the active area F-AA may be substantially defined by the peripheral area F-NAA. However, this is shown as an example. The peripheral area F-NAA may be set to be adjacent to only one side of the active area F-AA, or may be omitted. The display device ED according to an embodiment of the present invention may include active areas having various shapes, but is not limited to any one embodiment.

[0058] The sensing area SA may be included in the active area F-AA. Various electronic modules may be provided in the sensing area SA. For example, in an embodiment, the electronic module may include at least one of a camera module, a speaker, a light detection sensor, and a heat detection sensor. The sensing area SA may detect an external object received via the display surface FS, or provide a sound signal such as voice to the outside via the display surface FS. The electronic module may include a plurality of components and is not limited to any one embodiment.

[0059] The sensing area SA may be surrounded by the active area F-AA and the peripheral area F-NAA. However, the embodiments of the present invention are not limited thereto. In another embodiment, the sensing area SA may be disposed inside the active area F-AA, and is not limited to any one embodiment. Figure 1A etc. exemplarily show one sensing area SA, but the number of the sensing areas SA is not limited thereto.

[0060] The sensing area SA may be part of the active area F-AA. Therefore, the display device ED may display an image even in the sensing area SA. When the electronic module disposed in the sensing area SA is deactivated, the sensing area SA may be used as a display surface capable of displaying a video or an image.

[0061] The rear surface RS of the display device ED according to the embodiment may be a surface facing the display surface FS. In the embodiment, the rear surface RS is the outer surface of the display device ED, and the video or image may not be displayed in the rear surface RS. However, the embodiments of the present invention are not limited thereto, and in another embodiment, the rear surface RS may be used as a second display surface in which the video or image is displayed. In addition, the display device ED according to the embodiment may further include a sensing area provided in the rear surface RS. A camera, a speaker, a light detection sensor, etc. may also be provided in the sensing area provided in the rear surface RS.

[0062] The display device ED may include a folding area FA1 and non-folding areas NFA1 and NFA2. The display device ED may include a plurality of non-folding areas NFA1 and NFA2. The display device ED according to the embodiment may include a first non-folding area NFA1 and a second non-folding area NFA2, and a folding area FA1 is provided between the first non-folding area NFA1 and the second non-folding area NFA2. Figures 1A to 1C An embodiment of a display device ED including one folding area FA1 is shown, but the embodiment of the present invention is not limited thereto. In another embodiment, a plurality of folding areas may be defined in the display device ED. The display device ED according to the embodiment may be folded with respect to a plurality of folding axes, and may be folded so that parts of the display surface FS face each other. The number of folding axes and the number of non-folding areas corresponding to the folding axes are not particularly limited.

[0063] Reference Figure 1B and Figure 1C , the display device ED according to the embodiment may be folded with respect to the first folding axis FX1. Figure 1B and Figure 1C The first folding axis FX1 shown in FIG. 5 may be an imaginary axis extending in the first direction DR1 and parallel to the long side direction of the display device ED. However, embodiments of the present invention are not limited thereto, and the extending direction of the first folding axis FX1 is not limited to the first direction DR1.

[0064] The first folding axis FX1 may extend along the first direction DR1 on the display surface FS, or extend along the first direction DR1 below the rear surface RS. Figure 1B In an embodiment, the first non-folding area NFA1 and the second non-folding area NFA2 may face each other, and the display device ED may be folded inwardly so that the display surface FS is not exposed to the outside. Figure 1C , the display device ED according to the embodiment can be folded relative to the first folding axis FX1 and changed to an outward folded state. In the outward folded state, in the rear surface RS, one area overlapping with the first non-folding area NFA1 and another area overlapping with the second non-folding area NFA2 face each other in a plan view.

[0065] Figure 2A is a perspective view showing a deployed state of a display device according to another embodiment of the present invention. Figure 2B It is shown Figure 2A 0 is a perspective view showing a display device according to an embodiment of the present invention being folded inwardly.

[0066] The display device ED-a according to the embodiment may be folded with respect to a second folding axis FX2 extending in one direction parallel to the first direction DR1. Figure 2B It is shown that the extension direction of the second folding axis FX2 is parallel to the extension direction of the short side of the display device ED-a. However, embodiments of the present invention are not limited thereto.

[0067] The display device ED-a according to the embodiment may include at least one folding area FA2 and non-folding areas NFA3 and NFA4 adjacent to the folding area FA2. The non-folding areas NFA3 and NFA4 may be disposed to be spaced apart from each other with the folding area FA2 between them.

[0068] The folding area FA2 may have a predetermined curvature and a radius of curvature. In an embodiment, the first non-folding area NFA3 and the second non-folding area NFA4 may face each other, and the display device ED-a may be inwardly folded so that the display surface FS is not exposed to the outside.

[0069] Furthermore, unlike what is shown in the drawings, in an embodiment, the display device ED-a may be folded outwardly so that the display surface FS is exposed to the outside. In an embodiment, the first display surface FS of the display device ED-a may be visible to the user in an unfolded state, and the second display surface RS of the display device ED-a may be visible to the user in a folded state. The second display surface RS may include an electronic module area EMA in which an electronic module including various components is disposed.

[0070] The display device ED-a according to the embodiment may include a second display surface RS, and the second display surface RS may be defined as a surface facing away from at least a portion of the first display surface FS. The second display surface RS may be visible to the user in a folded state. The second display surface RS may include an electronic module area EMA in which electronic modules including various components are arranged. In an embodiment, an image may be provided via the second display surface RS.

[0071] In an embodiment, the display devices ED and ED-a may be configured to repeatedly perform an inner folding or outer folding operation from an unfolding operation, and vice versa, but the embodiments of the present invention are not limited thereto. In an embodiment, the display devices ED and ED-a may be configured to select at least one of an unfolding operation, an inner folding operation, and an outer folding operation.

[0072] Figures 1A to 2B The display devices ED and ED-a are shown as foldable display devices that can be deformed into a folded form, but the embodiments of the present invention are not limited thereto. The display devices ED and ED-a according to the embodiments may be deformable (e.g., bendable or rollable) flexible display devices. Figure 3 As shown in , the display device ED-b according to the embodiment may be a rigid display device.

[0073] Figure 3 is a perspective view of a display device according to another embodiment of the present invention. Figure 3 , on a plane, the display device ED-b according to the embodiment may have a quadrilateral shape having rounded corners in which short sides extend in a first direction DR1 and long sides extend in a second direction DR2 crossing the first direction DR1. However, the embodiments of the present invention are not limited thereto, and on a plane, the display device ED-b may have various shapes such as a polygonal shape (e.g., a rectangular shape and a square shape), a circular shape, or an irregular shape.

[0074] The display device ED-b can display an image IM in a display surface FS parallel to each of the first direction DR1 and the second direction DR2 in the third direction DR3. The display surface FS on which the image IM is displayed may correspond to the front surface of the display device ED-b and the window WM described later (see Figure 4 )'s front surface. Figure 3 A flat display surface FS is exemplarily shown, but the embodiments of the present invention are not limited thereto. In another embodiment, the display surface FS of the display device ED-b according to the embodiment may further include a curved surface bent from at least one side of the flat surface.

[0075] Figure 4 is an exploded perspective view of a display device according to an embodiment of the present invention. Figure 4 The example shows Figure 1A 0 is an exploded perspective view of a display device ED of the embodiment shown in FIG. Figure 5 is a cross-sectional view of a display device according to an embodiment of the present invention. Figure 5 is shown corresponding to Figure 4 A cross-sectional view of a portion along line II'.

[0076] Reference Figure 4 and Figure 5 , the display device ED according to the embodiment may include a display module DM and a window WM disposed on the display module DM. In addition, the display device ED according to the embodiment may include a support module SM disposed under the display module DM. Figure 4 and Figure 5 middle, Figures 1A to 1C The display device ED shown in FIG. 1 is described as an embodiment, but the description made herein can also be similarly applied to Figure 2A and 2B The display device ED-a shown in .

[0077] The window WM may cover the entire outside of the display module DM. The window WM may have a shape corresponding to the shape of the display module DM. In addition, the display device ED according to the embodiment may include a housing HAU that accommodates the display module DM and / or the support module SM, etc. The housing HAU may be coupled to the window WM. The housing HAU may provide an internal space in which the components of the display device ED may be accommodated. The housing HAU is disposed below the display module DM and may accommodate the display module DM. The housing HAU may include a metal material having glass, plastic, or relatively high rigidity. The housing HAU may absorb external impacts applied from the outside, or prevent impurities / moisture from penetrating into the display panel DP, thereby protecting the display panel DP. Although not shown in the drawings, the housing HAU may also include a hinge structure for facilitating folding or bending operations.

[0078] In the display device ED according to the embodiment, the display module DM can display an image in response to an electrical signal and transmit / receive information about an external input. The display surface of the display module DM can be divided into a display area DP-DA and a non-display area DP-NDA. The display area DP-DA can be defined as an area in which an image provided from the display module DM is displayed.

[0079] The non-display area DP-NDA is adjacent to the display area DP-DA. For example, in an embodiment, the non-display area DP-NDA may surround the display area DP-DA. However, this is shown as an example. The non-display area DP-NDA may be defined to have various shapes and is not limited to any one embodiment. According to an embodiment, the display area DP-DA of the display module DM may correspond to the active area F-AA (see Figure 1A ) at least a portion of.

[0080] In the display device ED according to the embodiment, the display module DM may include a folding display portion FA-D and non-folding display portions NFA1-D and NFA2-D. The folding display portion FA-D may correspond to the folding area FA1 of the display device ED, and the non-folding display portions NFA1-D and NFA2-D may correspond to the non-folding areas NFA1 and NFA2 of the display device ED (see Figure 1A ).

[0081] The window WM according to the embodiment is disposed on the display module DM. The window WM may include an optically transparent insulating material. The window WM may protect the display panel DP and / or the sensor layer IS, etc. That is, the window WM may be a cover window covering the upper portion of the display module DM.

[0082] The image IM generated from the display module DP (see Figure 1A ) may be passed through the window WM and provided to the user. The window WM may provide a touch surface of the display device ED. In the display device ED including the folding area FA1, the window WM may be a flexible window that can be folded.

[0083] The window WM may be provided as a display surface and a touch surface, and exhibit excellent optical characteristics. The window WM according to an embodiment may have a high light transmittance of about 90% or more in a visible light range of about 380 nm to about 780 nm.

[0084] The window WM according to the embodiment may include a hard coating layer HC (see Figure 8 etc.). Therefore, the display device ED including the window WM according to the embodiment may exhibit excellent durability and thus have improved folding characteristics and optical characteristics. The window WM according to the embodiment will be described in more detail later.

[0085] The display module DM may include a display panel DP and a sensor layer IS disposed on the display panel DP. In addition, although not shown, the display module DM may further include an optical layer (not shown) disposed on the sensor layer IS. The optical layer (not shown) may play a role in reducing reflection of external light. For example, in an embodiment, the optical layer (not shown) may include a polarizing layer or a color filter layer. Although in Figure 5 Although not shown in the figure, in another embodiment, the sensor layer IS may be omitted so that the bottom surface of the window WM may be in direct contact with the upper surface of the display panel DP.

[0086] The display panel DP may be configured to generate an image. For example, in an embodiment, the display panel DP may be an organic light emitting display panel, an inorganic light emitting display panel, a quantum dot display panel, a micro light emitting diode (LED) display panel, a nano-LED display panel, or a liquid crystal display panel. The display panel DP may be referred to as a display layer.

[0087] The sensor layer IS may be disposed on the display panel DP. The sensor layer IS may detect an external input applied from the outside. The external input may be a user's input. The user's input may include various types of external inputs such as a part of the user's body, light, heat, a pen, or pressure.

[0088] In the display module DM according to the embodiment, the sensor layer IS may be disposed on the display panel DP via a continuous process. In this case, it is understood that the sensor layer IS is disposed directly on the display panel DP. The wording "disposed directly on..." indicates that another component is not disposed between the sensor layer IS and the display panel DP. That is, no additional adhesive member may be disposed between the sensor layer IS and the display panel DP. In addition, according to an embodiment of the present invention, the sensor layer IS and the display panel DP may be bonded to each other via an adhesive member. The adhesive member may include a typical bonding agent or adhesive.

[0089] The display device ED according to the embodiment may include a lower film LF disposed under the display module DM. The lower film LF may be disposed under the display module DM and may protect the lower part of the display module DM. The display device ED according to the embodiment may include a lower adhesive layer AP-L bonding the display module DM and the lower film LF.

[0090] The lower film LF may be a polymer film. For example, in an embodiment, the lower film LF may be a polyethylene terephthalate ("PET") film or a polyimide ("PI") film. The lower film LF may prevent the occurrence of scratches on the rear surface of the display panel DP during the manufacturing process of the display panel DP. In addition, the lower film LF protects the display panel DP from pressure provided from the outside and may prevent the display panel DP from being deformed. The lower film LF may be a single-layer film or have a structure in which a plurality of films are stacked.

[0091] The lower adhesive layer AP-L may be disposed between the display panel DP and the lower film LF. The lower adhesive layer AP-L may be an optically clear adhesive ("OCA") film or an optically clear resin ("OCR") layer. However, the embodiments of the present invention are not limited thereto, and the lower adhesive layer AP-L may be an acrylate-based adhesive layer or a silicone-based adhesive layer, etc. Furthermore, in another embodiment, the lower adhesive layer AP-L may be omitted.

[0092] The display device ED according to the embodiment may include a support module SM disposed under the display module DM. The support module SM may include a support plate MP and a lower support member BSM.

[0093] The support plate MP may be disposed on the lower side of the display module DM. The support plate MP may be disposed on the lower side of the lower film LF. In an embodiment, the support plate MP may include a metal material or a polymer material. For example, in an embodiment, the support plate MP may include stainless steel, aluminum, or an alloy thereof. In addition, differently from this, the support plate MP may include carbon fiber reinforced plastic ("CFRP"). However, embodiments of the present invention are not limited thereto, and in another embodiment, the support plate MP may include a non-metallic material, plastic, glass fiber reinforced plastic, or glass.

[0094] A plurality of openings OP may be defined in the support plate MP. The support plate MP may include an opening pattern OP-PT including the plurality of openings OP. The opening pattern OP-PT may correspond to the folding area FA1.

[0095] The lower support member BSM may include a support member SPM and a filling part SAP. In a plan view, the support member SPM may overlap a majority of the display module DM. In a plan view, the filling part SAP may be disposed outside the support member SPM and overlap an outer area of ​​the display module DM.

[0096] The lower support member BSM may include at least one of a cushion layer CP, a support layer SP, a shielding layer EMP, and an interlayer bonding layer ILP. The configuration of the lower support member BSM is not limited to Figure 5, and may vary according to the size, shape, or operating characteristics of the display device ED. For example, in an embodiment, a portion of the pad layer CP, the support layer SP, the shielding layer EMP, and the interlayer bonding layer ILP may be omitted, or the stacking order of the pad layer CP, the support layer SP, the shielding layer EMP, and the interlayer bonding layer ILP may be changed to be different from Figure 5 Another order of the order shown in . Optionally, in addition to the components shown, additional components may also be included. For example, in an embodiment, the lower support member BSM may also include a digitizer, etc.

[0097] The cushion layer CP may be disposed on the lower side of the support plate MP. The cushion layer CP may prevent the support plate MP from being squeezed and plastically deformed due to external impact and force. Therefore, the cushion layer CP may improve the impact resistance of the display device ED. The cushion layer CP may include an elastomer such as a sponge or foam formed of a urethane resin. In addition, the cushion layer CP may include at least one of an acylate-based polymer, a urethane-based polymer, a silicone-based polymer, and an imide-based polymer. However, embodiments of the present invention are not limited thereto.

[0098] In addition, the pad layer CP may include a first subpad layer CP1 and a second subpad layer CP2 spaced apart from each other in the second direction DR2. The first subpad layer CP1 and the second subpad layer CP2 may be spaced apart from each other in a region corresponding to the folding axis FX1. The pad layer CP is provided as the first subpad layer CP1 and the second subpad layer CP2 spaced apart from each other in the folding region FA1, and thus the folding characteristics or bending characteristics of the display device ED may be improved.

[0099] The support layer SP may include a metal material or a polymer material. The support layer SP may be disposed on the lower side of the pad layer CP. For example, in an embodiment, the support layer SP may be a thin film metal substrate.

[0100] The supporting layer SP may include a first sub-supporting layer SSP1 and a second sub-supporting layer SSP2 spaced apart from each other in the second direction DR2. The first sub-supporting layer SSP1 and the second sub-supporting layer SSP2 may be spaced apart from each other with respect to a region corresponding to the folding axis FX1. The supporting layer SP is provided as the first sub-supporting layer SSP1 and the second sub-supporting layer SSP2 spaced apart from each other in the folding region FA1, and thus the folding characteristics or bending characteristics of the display device ED may be improved.

[0101] The shielding layer EMP may be disposed on the lower side of the support layer SP. The shielding layer EMP may be an electromagnetic wave shielding layer or a heat dissipation layer. In addition, the shielding layer EMP may function as a bonding layer. The interlayer bonding layer ILP may bond the support plate MP and the lower support member BSM. The interlayer bonding layer ILP may be provided in the form of a bonding resin layer or an adhesive tape. Figure 5It is shown that the interlayer bonding layer ILP is separated into two parts spaced apart from each other in the region corresponding to the folding area FA1, but the embodiments of the present invention are not limited thereto. The interlayer bonding layer ILP may be provided as a single layer that is not spaced apart in the folding area FA1.

[0102] The filling member SAP may be disposed at the periphery of the cushion layer CP and the support layer SP. The filling member SAP may be disposed between the support plate MP and the housing HAU. The filling member SAP may fill the space between the support plate MP and the housing HAU and fix the support plate MP.

[0103] In addition, the display device ED according to the embodiment may further include a module adhesive layer AP-DM disposed between the lower film LF and the supporting module SM. The module adhesive layer AP-DM may be an optically clear adhesive ("OCA") film or an optically clear resin ("OCR") layer. Although not shown in the drawings, an additional adhesive layer may also be disposed between the various components included in the supporting module SM.

[0104] Figure 6 is an exploded perspective view of a display device according to another embodiment of the present invention. Figure 6 The example shows Figure 3 0 is an exploded perspective view of a display device ED-b of the embodiment shown in FIG. Figure 7 is a cross-sectional view of a display device according to an embodiment of the present invention. Figure 7 is shown corresponding to Figure 6 A cross-sectional view of a portion along line II-II'.

[0105] Reference Figure 6 and Figure 7 , the display device ED-b according to the embodiment may include a window WM, a display module DM, a lower module LM and a housing HAU. The display module DM may include a display panel DP and an optical layer RCL. The window WM and the housing HAU may be coupled to form the appearance of the display device ED-b.

[0106] The window WM may be provided on the display module DM. The window WM may have a shape corresponding to that of the display module DM. The window WM may cover the entire appearance of the display module DM and protect the display module DM from external impact and scratches.

[0107] The display surface FS of the window WM may include a transmissive area TA and a frame area BZA. The transmissive area TA of the window WM may be an optically transparent area. The window WM may transmit an image IM provided from the display module DM via the transmissive area TA (see Figure 3 ).

[0108] In a plan view, the frame area BZA of the window WM may be aligned with the light blocking layer BM (see Figure 7 ) overlap. A light blocking layer BM may be provided on a lower surface of the window WM adjacent to the display module DM. The light blocking layer BM may be a rigid substrate including a material having a predetermined color, or may be an ink printed layer. The light blocking layer BM may be a layer formed while including a pigment or a dye. The light blocking layer BM may be provided in an edge region of the window WM. The frame region BZA of the window WM may prevent some components of the display panel DP that are provided to overlap with the frame region BZA from being observed from the outside.

[0109] The border area BZA may be adjacent to the transmission area TA. The shape of the transmission area TA may be substantially defined by the border area BZA. For example, in an embodiment, the border area BZA may be disposed outside the transmission area TA and surround the transmission area TA. However, this is shown as an example. The border area BZA may be adjacent to only one side of the transmission area TA or may be omitted. In addition, the border area BZA may not be disposed on the front surface of the display device ED-b, but may be disposed on the side surface of the display device ED-b.

[0110] The window WM included in the display device ED-b according to the embodiment includes a hard coating layer HC (see Figure 8 Therefore, the display device ED including the window WM according to the embodiment can exhibit excellent durability and thus have improved folding characteristics and optical characteristics. Figure 8 etc. describe the window WM according to the embodiment in more detail.

[0111] The optical layer RCL may be disposed between the display panel DP and the window WM. The optical layer RCL may reduce the reflectivity of light incident from the outside. The optical layer RCL may include at least one of a retarder, a polarizer, a polarizing film, and a polarizing filter. In an embodiment, the optical layer RCL may include a polarizing film. In this case, the optical layer RCL may be attached to the display panel DP via an adhesive layer. However, this is presented as an example, and embodiments of the present invention are not limited thereto. For another example, the optical layer RCL may include a color filter. In addition, referring to Figure 5 The described sensor layer IS may be disposed between the optical layer RCL and the display panel DP.

[0112] The display panel DP may be disposed between the window WM and the lower module LM. The display panel DP may display an image IM in response to an electrical signal. The display panel DP according to an embodiment may be a light-emitting display panel, but is not particularly limited thereto. For example, in an embodiment, the display panel DP may be an organic light-emitting display panel, an inorganic light-emitting display panel, an organic-inorganic light-emitting display panel, or a quantum dot light-emitting display panel. The light-emitting layer of the organic light-emitting display panel may include an organic light-emitting material, and the light-emitting layer of the inorganic light-emitting display panel may include an inorganic light-emitting material. The light-emitting layer of the organic-inorganic light-emitting display panel may include an organic-inorganic light-emitting material. The light-emitting layer of the quantum dot light-emitting display panel may include quantum dots and / or quantum rods, etc.

[0113] The image IM provided from the display device ED-b may be displayed in the front surface of the display panel DP. The front surface of the display panel DP may include a display area DP-DA and a non-display area DP-NDA. The display area DP-DA may be an area that is activated in response to an electrical signal and displays the image IM. According to an embodiment, the display area DP-DA of the display panel DP may correspond to the transmissive area TA of the window WM. In the present specification, the wording "an area / portion corresponds to another area / portion" means "overlapping each other" and is not limited to having the same area and / or shape.

[0114] The non-display area DP-NDA may be adjacent to the outside of the display area DP-DA. For example, in an embodiment, the non-display area DP-NDA may surround the display area DP-DA. However, embodiments of the present invention are not limited thereto, and the non-display area DP-NDA may be defined to have various shapes.

[0115] The non-display area DP-NDA may be an area in which a driving circuit or a driving line for driving elements provided in the display area DP-DA, various types of signal lines or pads for providing electrical signals, etc. may be provided. The non-display area DP-NDA of the display panel DP may correspond to the bezel area BZA of the window WM. The bezel area BZA may prevent components of the display panel DP provided in the non-display area DP-NDA from being observed from the outside.

[0116] The display device ED-b may include a circuit board MB connected to the display panel DP. The circuit board MB may be connected to one end of the display panel DP extending in the first direction DR1. The circuit board MB may generate an electrical signal provided to the display panel DP. For example, in an embodiment, the circuit board MB may include a timing controller that generates a signal provided to a driver of the display panel DP in response to a control signal received from the outside.

[0117] At least a portion of the non-display area DP-NDA of the display panel DP may be bent. A portion of the display panel DP connected to the circuit board MB may be bent so that the circuit board MB faces the rear surface of the display panel DP. The circuit board MB may be arranged on a plane to overlap with the rear surface of the display panel DP and be assembled. However, the embodiments of the present invention are not limited thereto, and in another embodiment, the display panel DP may be connected to the circuit board MB via a flexible circuit board connected to one end of each of the display panel DP and the circuit board MB.

[0118] The display device ED-b according to the embodiment may include a lower module LM below the display panel DP. The lower module LM may include a panel protection layer PF, a cushion layer CP, and a support layer SP.

[0119] The panel protection layer PF is disposed under the display panel DP and thus can protect the display panel DP from impact. The panel protection layer PF may be bonded to the lower surface of the display panel DP via an adhesive layer (not shown). However, the adhesive layer may be omitted.

[0120] The cushion layer CP may be disposed below the panel protection layer PF. The cushion layer CP may absorb the impact transmitted from below the display panel DP. Therefore, the cushion layer CP may improve the impact resistance of the display device ED-b. The cushion layer CP may include an elastomer such as a sponge or foam formed of a urethane resin. The cushion layer CP may include at least one of an acylate-based polymer, a urethane-based polymer, a silicone-based polymer, and an imide-based polymer. However, embodiments of the present invention are not limited thereto.

[0121] The support layer SP is disposed under the pad layer CP, and thus can support the display panel DP and the pad layer CP. The support layer SP may be a thin film metal substrate having a rigidity greater than a predetermined rigidity. For example, in an embodiment, the support layer SP may be a stainless steel plate. The support layer SP may have a black color to block external light from being incident on the display panel DP.

[0122] The housing HAU may provide an interior space in which components of the display device ED-b may be accommodated. Figure 4 The contents of the described housing HAU can be similarly applied to the housing HAU included in the display device ED-b.

[0123] Figures 8 to 11 They are cross-sectional views of windows according to embodiments of the present invention, respectively. Figures 8 to 11 2 are cross-sectional views respectively illustrating windows WM, WM-1, WM-2, and WM-3 including a hard coating layer HC according to an embodiment. Figures 8 to 11 The windows WM, WM-1, WM-2, and WM-3 shown in FIG. 1 may each be a window according to an embodiment of the present invention. Figures 4 to 7Window WM shown in . For example, in an embodiment, Figures 8 to 10 The windows WM, WM-1, and WM-2 shown in FIG. 1 can each be used as a reference Figures 1A to 5 Cover windows of display devices ED and ED-a are described. Fig.11 The window WM-3 shown in the figure can be used as a reference Figure 3 , Figure 6 and Figure 7 However, the embodiments of the present invention are not limited thereto, and Figures 8 to 10 The windows WM, WM-1 and WM-2 shown in FIG. 1 can be applied to Figure 3 The display device ED-b shown in FIG. Fig.11 The window WM-3 shown in the figure can also be applied to Figures 1A to 5 The display devices ED and ED-a shown in .

[0124] Reference Figure 8 , the window WM according to the embodiment may include a hard coating layer HC formed of the resin composition according to the embodiment. Hereinafter, the following description of the hard coating layer HC included in the window WM may be similarly applied not only to Figure 8 The window WM according to the embodiment shown in FIG. 1 can also be applied to the reference Figures 9 to 11 The configurations of the windows WM-1, WM-2, and WM-3 according to the embodiment are described.

[0125] The hard coating layer HC may be formed by curing the resin composition according to the embodiment (hereinafter, the first resin composition). When ultraviolet rays are emitted during the process of curing the first resin composition, at least a portion of the compound included in the first resin composition may be cross-linked due to a polymerization reaction. Therefore, the hard coating layer HC according to the present invention may include a polymer obtained from the first resin composition.

[0126] Since the window WM according to the embodiment includes the hard coating layer HC formed of the first resin composition, the window WM may be provided on the display module DM (eg, see Figure 4 ) without a base layer such as a glass substrate and a plastic substrate. Therefore, when the folding operation is performed multiple times, cracks can be prevented from occurring on the surface of the window WM according to the embodiment.

[0127] The first resin composition may include a photoinitiator, a fluorine-based compound, an acrylate-based compound, and a reactive diluent, and further include an ultraviolet absorber and / or an additive.

[0128] The photoinitiator is a material that generates free radicals or ions when irradiated with light, and may include at least one of an acetophenone-based compound, a sulfonium-based compound, and a benzophenone-based compound. One or more types of photoinitiators may be included in the first resin composition. When the first resin composition includes a plurality of photoinitiators, the photoinitiators may be activated in response to ultraviolet light having different central wavelengths, respectively.

[0129] For example, in an embodiment, the photoinitiator may include at least one of Irgacure 651 (benzyl dimethyl ketal), Irgacure 184 (1-hydroxy-cyclohexyl-phenyl-ketone), and Irgacure 819 (bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide), but embodiments of the present invention are not limited thereto.

[0130] The first resin composition may include a photoinitiator in an amount of about 0.1% by weight or more and less than about 5% by weight relative to the total weight of the first resin composition. In the case where the first resin composition includes the photoinitiator in an amount within the above range, a polymerization reaction may sufficiently occur during light irradiation for forming the hard coating layer HC.

[0131] The first resin composition may include a fluorine-based compound so that the surface of the window WM exhibits sliding properties or anti-fingerprint properties. The fluorine-based compound may include perfluoropolyether. The perfluoropolyether may be a compound represented by the chemical formula F:

[0132]

Chemical formula F

[0133]

[0134] In Chemical Formula F, p and q may each independently be an integer of 10 to 50, but embodiments of the present invention are not limited thereto.

[0135] Although the hard coating layer HC according to the embodiment does not include a boundary surface clearly defined by a separate layer, the fluorine-based compound may be mostly disposed in the upper portion of the hard coating layer HC. Therefore, when the hard coating layer HC is disposed on the outermost layer of the window WM, the window WM may exhibit excellent antifouling properties and durability.

[0136] The first resin composition may include the fluorine-based compound in an amount of about 0.1% by weight or more and less than about 5% by weight relative to the total weight of the first resin composition. When the first resin composition includes the fluorine-based compound in an amount within the above range, the window WM including the hard coating layer HC may have improved antifouling properties and durability.

[0137] The first resin composition may include an acrylate-based compound, thereby showing excellent reactivity and curability during curing, and giving the hard coating layer HC appropriate hardness and flexibility. The acrylate-based compound may include at least one of polyester acrylate, epoxy acrylate, urethane acrylate, and ethylene glycol acrylate. For example, in an embodiment, polyester acrylate has excellent reactivity, and epoxy acrylate has excellent hardness, flexibility, and curability. In addition, urethane acrylate has excellent curability and is conducive to forming a hard coating film. The first resin composition may selectively include polyester acrylate, epoxy acrylate, urethane acrylate, etc. showing the above-mentioned characteristics. The first resin composition according to an embodiment of the present invention can be used by mixing one or more types of the above-mentioned acrylate-based compounds.

[0138] The acrylate-based compound may have a molecular weight of about 2000 g / mol to about 15000 g / mol. For example, in an embodiment, polyester acrylate, epoxy acrylate, urethane acrylate, and ethylene glycol acrylate may each have a molecular weight of about 2000 g / mol to about 15000 g / mol. When the acrylate-based compound has a molecular weight within the above range, the hard coating layer HC may have improved hardness and adhesion.

[0139] Acrylate-based compounds may include monofunctional or multifunctional oligomeric acrylates. For example, in an embodiment, polyester acrylate may include one or more (meth)acryloyl groups each of which has a polyester bond. Epoxy acrylate may include one or more (meth)acryloyl groups each of which has an epoxy bond. Urethane acrylate may include one or more (meth)acryloyl groups each of which has a urethane bond. Ethylene glycol acrylate may include one or more (meth)acryloyl groups each of which has an ethylene glycol bond. In this specification, (meth)acryloyl represents acryloyl or methacryloyl, and (meth)acrylic acid represents acrylic acid or methacrylic acid.

[0140] In an embodiment, the first resin composition is an acrylate-based compound and may include a first monomer and a second monomer. The first monomer may be a compound including 4 to 6 (meth)acryloyl groups in the molecule. The second monomer may be a compound including three (meth)acryloyl groups in the molecule.

[0141] The first monomer may be included in an amount of about 40 weight percent (wt%) to about 70 wt% relative to 100 wt% of the total weight of the first resin composition. When the first resin composition includes the first monomer in an amount within the above range, the hard coating layer HC may be increased in hardness and thus may be improved in wear resistance.

[0142] The oligoacrylate and the second monomer may each be included in an amount of about 10 wt % to about 20 wt % relative to 100 wt % of the total weight of the first resin composition. Since the first resin composition includes the oligoacrylate and the second monomer in an amount within the above range, the hardness of the hard coating layer HC is adjusted, and thus the adhesion of the hard coating layer HC can be effectively improved.

[0143] In order to provide adhesion and flexibility to the hard coating layer HC, the first resin composition may further include (meth)acrylate alkyl ester (which is a non-ultraviolet curable resin monomer) as an acrylate-based compound in addition to polyester acrylate, epoxy acrylate, urethane acrylate and / or glycol acrylate.

[0144] The (meth) alkyl acrylate may be a (meth) acrylate having an alkyl group. The (meth) alkyl acrylate may be a (meth) acrylate containing an unsubstituted alkyl group having 1 to 10 carbon atoms. For example, in an embodiment, the (meth) alkyl acrylate may include at least one of methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, n-butyl (meth) acrylate, tert-butyl (meth) acrylate, isobutyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate, octyl (meth) acrylate, nonyl (meth) acrylate, and isodecyl (meth) acrylate. The first resin composition according to the embodiment may also include n-butyl (meth) acrylate, tert-butyl (meth) acrylate, or isobutyl (meth) acrylate as an acrylate-based compound.

[0145] The first resin composition according to the embodiment may include a reactive diluent. Since the first resin composition includes the reactive diluent, the viscosity of the composition may be adjusted, and thus curability and adhesion, etc. may be effectively improved.

[0146] The first resin composition may have a viscosity of about 1000 centipoise (cps) or less to facilitate discharge when forming the hard coating layer HC. To this end, the first resin composition may include at least one of polyester acrylate and polyether acrylate (which has a low molecular weight) as a reactive diluent. For example, in an embodiment, the polyester acrylate and the polyether acrylate may each have a molecular weight of about 1000 g / mol or less, but the embodiments of the present invention are not limited thereto. The polyester acrylate and the polyether acrylate may each have a molecular weight greater than 0 and about 1000 g / mol or less.

[0147] For example, in an embodiment, the active diluent may be included in an amount of about 1 wt % to about 5 wt % relative to 100 wt % of the total weight of the first resin composition. When the first resin composition includes the active diluent in an amount within the above range, the first resin composition is coated in a uniform amount and a uniform thickness, and thus the adhesion of the hard coating layer HC may be effectively improved.

[0148] The first resin composition may further include an additive. The additive may be a highly flexible material and is represented by Chemical Formula 1 or Chemical Formula 2:

[0149]

Chemical formula 1

[0150]

[0151]

Chemical formula 2

[0152]

[0153] In Chemical Formula 1 and Chemical Formula 2, R 1 To R 4 Can be each independently a hydrogen atom or an unsubstituted methyl group. For example, in the embodiment, R 1 To R 4 Each may be a hydrogen atom. In Chemical Formula 1 and Chemical Formula 2, n1 may be an integer from 1 to 10. m1 and m2 may each independently be an integer from 1 to 20, and the sum of m1 and m2 may be 10 to 30. In an embodiment, for example, the sum of m1 and m2 may be 10 or 30, but embodiments of the present invention are not limited thereto.

[0154] In an embodiment, the additive represented by Chemical Formula 1 may be represented by Chemical Formula 1-1 or Chemical Formula 1-2:

[0155]

Chemical formula 1-1

[0156]

[0157]

Chemical formula 1-2

[0158]

[0159] Chemical formula 1-1 and Chemical formula 1-2 each represent a case where the number of n1 in Chemical formula 1 is specified. Chemical formula 1-1 corresponds to a case where n1 in Chemical formula 1 is 3. For example, in an embodiment, Chemical formula 1-1 may be 1,6-hexanediol di(meth)acrylate. Chemical formula 1-2 corresponds to a case where n1 in Chemical formula 1 is 5. For example, in an embodiment, Chemical formula 1-2 may be 1,10-decanediol di(meth)acrylate.

[0160] In Chemical Formula 1-1 and Chemical Formula 1-2, the description of Chemical Formula 1 can be similarly applied to R 1 and R 2 .

[0161] In an embodiment, the additive represented by Chemical Formula 2 may be represented by Chemical Formula 2-1 or Chemical Formula 2-2:

[0162]

Chemical formula 2-1

[0163]

[0164]

Chemical formula 2-2

[0165]

[0166] In Chemical Formula 2-1, the sum of m1 and m2 may be 10, and in Chemical Formula 2-2, the sum of m1 and m2 may be 30. For example, in an embodiment, Chemical Formula 2-1 may be bisphenol A (EO) 10 Diacrylate, and chemical formula 2-2 may be bisphenol A (EO) 30 Diacrylate.

[0167] By adjusting the additive content, the first resin composition may include additives so that the hard coating layer HC may exhibit excellent adhesion and high flexibility. For example, in an embodiment, the additive may be included in an amount of about 40 wt % to about 70 wt % relative to 100 wt % of the total weight of the first resin composition. When the first resin composition includes the additive in an amount within the above range, the hard coating layer HC may have improved flexibility and exhibit excellent adhesion. However, embodiments of the present invention are not limited thereto.

[0168] The first resin composition may further include an ultraviolet absorber having an effect of blocking the transmission of ultraviolet rays having a wavelength of about 410 nm or less. The ultraviolet absorber may include at least one of a salicylic acid-based compound, a benzophenone-based compound, a benzotriazole-based compound, a cyanoacrylate-based compound, a phenol nickel-based compound, and a hindered amine-based compound. For example, in an embodiment, the ultraviolet absorber may include at least one of a benzophenone-based compound and a benzotriazole-based compound.

[0169] In an embodiment, the ultraviolet absorber may include at least one of 2-(2-hydroxy-5-methylphenyl)benzotriazole, 2-(3-tert-butyl-2-hydroxy-5-methylphenyl)-2H-5-chlorobenzotriazole, 2-(2'-hydroxy-5'-trioctylphenyl)benzotriazole, and 2-hydroxy-4-n-octyloxybenzophenone.

[0170] The ultraviolet absorber may be included in an amount of about 1 wt % to 5 wt % relative to 100 wt % of the total weight of the first resin composition. When the first resin composition includes the ultraviolet absorber in an amount within the above range, the hard coating layer HC formed by the first resin composition according to the embodiment may block most of ultraviolet rays having a wavelength of about 350 nm or less. Therefore, the window WM according to the embodiment may protect the layers below the hard coating layer HC.

[0171] The window WM according to the embodiment may include an adhesive layer PL disposed under the hard coating layer HC. The adhesive layer PL may be disposed between the hard coating layer HC and the display module DM (see Figure 4 ). The adhesive layer PL may be in direct contact with the lower surface of the hard coating layer HC. The adhesive layer PL may be an optically clear adhesive ("OCA") film or a pressure sensitive adhesive ("PSA") layer.

[0172] The window WM including the adhesive layer PL and the hard coating layer HC according to the embodiment may be directly disposed on the display module DM (see Figure 4 ) is directly set on the display module DM (see Figure 4 ) can exhibit such excellent folding characteristics that even in a low curvature structure (e.g., an outer folding 3R), cracks can be prevented from appearing in the surface of the window WM when the folding operation is performed multiple times. 3R is a curvature radius value. The curvature radius value 3R indicates that the panel is curved enough to wrap around a cylinder with a radius of 3 mm.

[0173] For example, in an embodiment, the hard coating layer HC may have a thickness of about 50 μm to about 100 μm. The adhesive layer PL may have a thickness of about 100 μm or less. For example, in an embodiment, the adhesive layer PL may have a thickness of about 10 μm to about 100 μm, but embodiments of the present invention are not limited thereto. When the adhesive layer PL and the hard coating layer HC of the window WM may each have the above-mentioned thickness range, the window WM according to the embodiment may exhibit excellent durability and folding characteristics.

[0174] Fig. 9 The example shows Figure 8 The window WM-1 further includes a high-refractive layer HR, a low-refractive layer LR and a functional layer AF, and Fig.10 The example shows Figure 8 The window WM is compared to the window WM-2 which also includes a primer layer PR. Fig. 9 and Fig.10 Contents that are repeated with those previously described will be omitted, and the following description will mainly focus on the differences.

[0175] Reference Fig. 9, according to an embodiment, window WM-1 may include a hard coating layer HC, a high refractive index layer HR, a low refractive index layer LR, and a functional layer AF. In addition, window WM-1 may include an adhesive layer PL disposed below the hard coating layer HC. The hard coating layer HC, the high refractive index layer HR, the low refractive index layer LR, and the functional layer AF may be provided in sequence on the adhesive layer PL.

[0176] The high refractive index layer HR may be disposed on the hard coating layer HC. The high refractive index layer HR may be directly disposed on the hard coating layer HC. The lower surface of the high refractive index layer HR may be in contact with the upper surface of the hard coating layer HC.

[0177] The high refractive index layer HR may have a first refractive index greater than the refractive index of the low refractive index layer LR. For example, in an embodiment, the high refractive index layer HR may have a first refractive index of about 1.6 or greater. For example, in an embodiment, the first refractive index may be from about 1.6 to about 1.67. When the first refractive index of the high refractive index layer HR according to an embodiment satisfies the above range, the surface reflectance of the window WM-1 may be reduced.

[0178] The high refractive index layer HR may include at least one of tin oxide (SnO x ), titanium oxide (TiO x ), zirconium oxide (ZrO x ), and sulfur atoms. The tin oxide, titanium oxide, and zirconium oxide included in the high refractive index layer HR may be represented by SnO x , TiO x , and ZrO x (where 0 < x < 3), respectively. In an embodiment, for example, the tin oxide may be SnO 2 , but the embodiments of the present invention are not limited thereto.

[0179] In an embodiment, the high refractive index layer HR may have a thickness of about 80 nm to about 110 nm. For example, in an embodiment, the high refractive index layer HR may have a thickness of about 100 nm. When the high refractive index layer HR has a thickness in the range of about 80 nm to about 110 nm, the window WM-1 according to an embodiment may exhibit excellent optical properties of high light transmittance and low reflectance. In addition, the window WM-1 including the high refractive index layer HR having the above thickness range according to an embodiment has excellent impact resistance and the like, and thus may have improved durability.

[0180] The low refractive index layer LR may be disposed on the high refractive index layer HR. The low refractive index layer LR may be directly disposed on the high refractive index layer HR. The lower surface of the low refractive index layer LR may be in contact with the upper surface of the high refractive index layer HR. The low refractive index layer LR may be disposed to be adjacent to the display surface FS (see Figure 1A ) exposed to the outside compared to the high refractive index layer HR. However, the embodiments of the present invention are not limited thereto.

[0181] The second refractive index of the low refractive layer LR can be adjusted according to the combination with the refractive index of the high refractive layer HR so that the total reflectivity of the window WM-1 becomes about 6% or less. With respect to light having a wavelength of about 360nm to about 700nm, the window WM-1 including the low refractive layer LR according to the embodiment can have a reflectivity of about 6% or less.

[0182] The second refractive index of the low refractive layer LR may be lower than the first refractive index of the high refractive layer HR. The second refractive index may be about 1.5 or less. For example, in an embodiment, the second refractive index of the low refractive layer LR may be about 1.42 to about 1.50. However, embodiments of the present invention are not limited thereto, and the second refractive index of the low refractive layer LR may be adjusted within a range in which the window WM maintains a low reflectivity of about 6% or less.

[0183] The low-refractive layer LR may include hollow particles and a matrix resin, and may also include additives. For example, in an embodiment, the low-refractive layer LR may include a polymer obtained from a second resin composition including hollow particles and a matrix resin. In addition, the second resin composition may also include one or more additives selected from fillers, slip agents, light stabilizers, thermal polymerization inhibitors, leveling agents, lubricants, antifouling agents, thickeners, surfactants, defoamers, antistatic agents, dispersants, initiators, coupling agents, antioxidants, ultraviolet stabilizers, and colorants.

[0184] For example, in an embodiment, hollow particles may be included in an amount of about 25wt% to about 35wt% relative to the total weight of the second resin composition. When the amount of the hollow particles included in the second resin composition satisfies the above range, the low-refractive layer LR formed by the second resin composition can fully exhibit low reflectivity while improving the mechanical durability of the low-refractive layer LR. That is, when hollow particles are included in an amount of about 25wt% to about 35wt% relative to the total weight of the low-refractive layer LR, the window WM-1 according to the embodiment can exhibit further improved optical properties and durability.

[0185] For example, in an embodiment, when the hollow particles are contained in an amount less than about 25wt% relative to the total weight of the second resin composition, the value of the second refractive index of the low-refractive layer LR increases, and therefore, considering the relationship with other components, the light extraction function of the low-refractive layer LR may be deteriorated. In addition, when the hollow particles are contained in an amount greater than about 35wt% relative to the total weight of the second resin composition, the amount of the hollow particles contained in the low-refractive layer LR is relatively increased, and therefore the mechanical strength of the low-refractive layer LR may be reduced.

[0186] The hollow particles may each have a core-shell form. The hollow particles may each include a core portion and a shell portion surrounding the core portion. The core portion may be defined by the shell portion. The shell portion may be a layer formed of an inorganic material. The shell portion may include SiO 2 That is, the hollow particles in the low refractive layer LR according to the embodiment may be hollow silica.

[0187] The hollow particles may have an average diameter of about 30 nm to about 70 nm. When the average diameter of the hollow particles satisfies the above range, the thickness and the second refractive index value of the low refractive layer LR may be optimized.

[0188] The matrix resin included in the low refractive layer LR may include an acylate-based resin, a urethane-based resin, a fluorine-based resin, an epoxy-based resin, a polyester-based resin, a polyamide-based resin, a silicone resin, or a combination thereof. The matrix resin may be provided in the form of a monomer or an oligomer. The matrix resin may be liquid before curing.

[0189] In an embodiment, the low refractive layer LR may have a thickness of about 60nm to about 90nm. For example, in an embodiment, the low refractive layer LR may have a thickness of about 70nm. When the low refractive layer LR has a thickness in the range of about 60nm to about 90nm, the window WM-1 according to the embodiment may exhibit excellent optical properties of high light transmittance and low reflectivity. In addition, the window WM-1 according to the embodiment including the low refractive layer LR having a thickness in the range of about 60nm to about 90nm has excellent impact resistance, etc., and thus may exhibit improved durability.

[0190] The window WM-1 according to an embodiment of the present invention may include a two-layer structure in which a layer having a relatively high refractive index and a layer having a relatively low refractive index are sequentially stacked in a thickness direction. Therefore, the window WM-1 may have an improved anti-reflection effect.

[0191] The window WM-1 according to the embodiment may include a functional layer AF disposed on the low-refractive layer LR. The functional layer AF may be directly disposed on the low-refractive layer LR. In addition, the functional layer AF may be disposed on the low-refractive layer LR via an adhesive layer (not shown). The functional layer AF may be disposed on the outermost portion of the window WM-1.

[0192] The functional layer AF may be composed of a single layer or multiple layers. The functional layer AF may include a hard coating layer (e.g., Figure 8 In an embodiment, the functional layer AF may include a fluorine-containing compound. In an embodiment, the functional layer AF including the fluorine-containing compound may be an anti-fingerprint layer.

[0193] The functional layer AF may have a thickness of about 10 nm to about 30 nm. When the functional layer AF has a thickness within the above range, the functional layer AF may have not only excellent antifouling properties but also excellent durability.

[0194] In an embodiment, the functional layer AF may include perfluoropolyether. The perfluoropolyether may be a compound represented by the above-mentioned Chemical Formula F.

[0195] Reference Fig.10 , the window WM-2 according to the embodiment may further include a primer layer PR. The primer layer PR may be disposed between the adhesive layer PL and the hard coating layer HC. The lower surface of the primer layer PR may be in direct contact with the upper surface of the adhesive layer PL, and the upper surface of the primer layer PR may be in direct contact with the lower surface of the hard coating layer HC.

[0196] In an embodiment, the primer layer PR may include silicon oxide and a UV absorber. The silicon oxide included in the primer layer PR may be included in an amount of about 90 wt % to about 95 wt % relative to the total weight of the primer layer PR. In addition, the UV absorber included in the primer layer PR may be included in an amount of about 1 wt % to about 10 wt % relative to the total weight of the primer layer PR. When the primer layer PR includes silicon oxide and the UV absorber within the above range, the adhesion between the hard coating layer HC and the adhesive layer PL can be further improved, and most of the ultraviolet rays having a wavelength of about 350 nm or less can be blocked, thereby protecting the layer disposed under the window WM-2.

[0197] In the embodiments of the present invention, except for the content range, reference is made to Figure 8 The description of the ultraviolet absorber included in the hard coating layer HC may be similarly applied to the ultraviolet absorber included in the primer layer PR.

[0198] and Figure 8 Compared with the window WM, Fig.11 The window WM-3 including the first layer L1 and not including the adhesive layer PL is exemplarily shown. Fig.11 In the description of Figures 1A to 10 The contents described are duplicated, and the following description will mainly focus on the differences.

[0199] Reference Fig.11 , the window WM-3 according to the embodiment may include a first layer L1 and a hard coating layer HC. The first layer L1 may be disposed below the hard coating layer HC and the display module DM (see Figure 6 The lower surface of the first layer L1 may be in contact with the display module DM (see Figure 6 ) is in direct contact with an upper surface of the hard coating layer HC, and an upper surface of the first layer L1 may be in direct contact with a lower surface of the hard coating layer HC.

[0200] The first layer L1 may include a resin material cured by laser irradiation. For example, in an embodiment, the first layer L1 may be formed by applying and curing a resin material such as a resin. Alternatively, the first layer L1 may include a polyethylene terephthalate (PET) film. The first layer L1 may be referred to as a "resin layer".

[0201] In an embodiment, when the first layer L1 includes a resin material cured by laser irradiation, a lamination process may be omitted during the manufacture of the display device, thereby simplifying the display device manufacturing process and reducing costs.

[0202] In the window WM-3 according to the embodiment, the first layer L1 may have a greater thickness than the hard coating layer HC. For example, in the embodiment, the first layer L1 may have a thickness of about 250 μm to about 350 μm. In the embodiment, the first layer L1 may have a thickness of about 300 μm. In addition, the hard coating layer HC may have a thickness of about 10 μm to about 15 μm. When the first layer L1 and the hard coating layer HC of the window WM-3 may have the above-mentioned thickness ranges, respectively, the window WM-3 according to the embodiment may exhibit excellent durability.

[0203] The window WM-3 according to the embodiment may further include a high refractive layer, a low refractive layer and a functional layer on the hard coating layer HC. The high refractive layer, the low refractive layer and the functional layer may be sequentially disposed on the hard coating layer HC. Fig. 9 The contents of the described high refractive layer HR, low refractive layer LR, and functional layer AF may be similarly applied to the high refractive layer, low refractive layer, and functional layer disposed on the hard coating layer HC in the window WM-3 according to the embodiment.

[0204] Hereinafter, with reference to examples and comparative examples, a window according to an embodiment and a display device including the window will be described in more detail. However, the following examples and comparative examples are merely examples for describing the present invention in more detail, and embodiments of the present invention are not limited to the following examples and comparative examples.

[0205] [Example]

[0206] 1. Fabrication and Evaluation of Window (Fabrication of Example 1)

[0207] Manufacturing with Figure 8 The window of Example 1 includes a hard coating layer formed by using a first resin composition according to an embodiment. That is, the window of this example includes an adhesive layer and a hard coating layer stacked in sequence, and the hard coating layer includes a polymer formed by a first resin composition. The hard coating layer included in the window of Example 1 is formed by using a first resin composition including a photoinitiator, a fluorine-based compound, an acrylate-based compound, a reactive diluent, and an additive (highly flexible material).

[0208] (Manufacturing of Example 2)

[0209] Manufacturing with Figure 8 The window of Example 2 includes a hard coating layer formed by using a first resin composition according to an embodiment. That is, the window of this example includes an adhesive layer and a hard coating layer stacked in sequence, and the hard coating layer includes a polymer formed by a first resin composition. The hard coating layer included in the window of Example 2 is formed by using a first resin composition, the first resin composition includes a photoinitiator, a fluorine-based compound, an acrylate-based compound, a reactive diluent and an additive (highly flexible material), and the first resin composition also includes an ultraviolet absorber.

[0210] (Manufacturing of Comparative Example 1)

[0211] The window of Comparative Example 1 differs from the window of Example 1 in that the hard coating layer is not included.

[0212] 2. Window evaluation 1

[0213] Abrasion resistance, chemical resistance, and the like were measured to evaluate the windows according to Example 1 and Comparative Example 1. The respective evaluation methods were as follows.

[0214] (1) Wear resistance

[0215] Wear resistance may also be referred to as eraser abrasion resistance. Wear resistance is evaluated by observing with the naked eye the surface subjected to a wear test with an eraser or by measuring the water contact angle of the surface.

[0216] Window to be evaluated is cut into about 7 centimetres (cm) × about 8cm of sheet and fixed on abrasion resistance tester (scratch tester manufactured by Dacheng Precision (Daesung Precision) company) fixture, and the eraser (rubber stick manufactured by Minoan (Minoan) company) with a diameter of about 6 millimetres (mm) is attached and fixed to the top of the abrasion resistance tester fixture. The moving distance of about 15mm, the moving speed of about 50 revolutions per minute (rpm) and the load of about 1.0 kilogram (kg) are set, and the eraser is reciprocated on the surface of the test window. After this, observe the surface with the naked eye, or measure the water contact angle on the surface worn after reciprocating friction according to the above-mentioned water contact angle measuring method.

[0217] (2) Chemical resistance

[0218] Chemical resistance may also be referred to as eraser chemical abrasion resistance. Chemical resistance is evaluated by providing chemicals to the surface of the window and then observing the surface abraded with an eraser with the naked eye or measuring the water contact angle of the surface.

[0219] Window to be evaluated is cut into the sheet of about 7cm × about 8cm and is fixed on the abrasion resistance tester (scratch tester manufactured by Daesung Precision company) fixture, and the eraser (rubber stick manufactured by Minoan company) of about 6mm in diameter is attached and fixed to the top of the abrasion resistance tester fixture. Absolute ethanol is sprayed on the surface of the test window, and then in the presence of ethanol, the moving distance of about 15mm, the moving speed of about 50rpm and the load of about 1.0kg are set. After this, the eraser is reciprocated on the surface of the test window, and then observes this surface with naked eyes, or measures the water contact angle on the surface worn after reciprocating friction and wiping several times according to the above-mentioned water contact angle measuring method.

[0220] [Table 1]

[0221]

[0222] Referring to Table 1, it can be confirmed that, compared with Comparative Example 1, even after evaluating the wear resistance and chemical resistance, the window of Example 1 still maintains a water contact angle of about 95° or more, and exhibits excellent wear resistance and chemical resistance. In addition, it was observed that in the wear resistance and chemical resistance test, the surface of the window of Comparative Example 1 was damaged after the surface was reciprocated for about 500 times. Even after the surface was reciprocated for about 2000 times and about 1000 times, the window of Example 1 exhibited good surface properties. Compared with Comparative Example 1, the window of Example 1 includes a hard coating layer formed by the first resin composition, and therefore exhibits excellent chemical resistance. That is, it can be confirmed that, compared with Comparative Example 1, the window of Example 1 exhibits excellent mechanical properties and durability.

[0223] In addition, compared with Comparative Example 1, the window of Example 1 can also exhibit excellent durability even when the hard coating layer is not included. The window of Example 1 may include a high refractive layer formed of a first resin composition including a highly flexible material, thereby not only having a hard coating function but also exhibiting a high refractive index characteristic. Therefore, when the window of Example 1 is applied to a display device, not only excellent durability can be ensured, but also the overall thickness of the display device can be reduced.

[0224] 3. Light transmittance measurement

[0225] Fig.12 is a graph showing the light transmittance of a window according to an embodiment of the present invention. Specifically, Fig.12 The evaluation results of the optical characteristics of the windows of Example 1 and Example 2 are shown. Fig.12, it can be confirmed that the window of Example 2 including the hard coating layer formed by the first resin composition, which further includes an ultraviolet absorber, blocks most of ultraviolet rays having a wavelength of about 350 nm or less. That is, the window of Example 2 exhibits excellent ultraviolet blocking properties compared to Example 1. Therefore, when the window including the hard coating layer including the ultraviolet absorber is applied to a display device, a display device with improved visibility can be provided.

[0226] The window according to the embodiment of the present invention includes a hard coating layer including a specific component, thereby exhibiting excellent wear resistance and chemical resistance, and having excellent folding characteristics to prevent cracks.

[0227] Therefore, a display device including the above-described window exhibits excellent durability even in a low-curvature structure, thereby providing improved visibility.

[0228] Although the embodiments of the present invention have been described, it should be understood that the present invention should not be limited to these embodiments, but various changes and modifications may be made by one of ordinary skill in the art within the spirit and scope of the present invention as claimed in the appended claims.

[0229] Therefore, the technical scope of the present invention is not limited to the contents described in the detailed description of the specification, but should be determined by the claims.

Claims

1. A window, wherein: The window includes a hard coating layer comprising a polymer obtained from a resin composition including a photoinitiator, a fluorine-based compound, an acrylate-based compound, and a reactive diluent, Wherein, the acrylate-based compound includes at least one of polyester acrylate, epoxy acrylate, urethane acrylate and ethylene glycol acrylate, and The reactive diluent includes at least one of a polyester acrylate and a polyether acrylate having a molecular weight greater than 0 grams per mole and 1000 grams per mole or less.

2. The window according to claim 1, wherein: The resin composition further comprises an ultraviolet absorber, and The ultraviolet absorber includes at least one of a salicylic acid-based compound, a benzophenone-based compound, a benzotriazole-based compound, a cyanoacrylate-based compound, a nickel phenol-based compound, and a hindered amine-based compound.

3. The window according to claim 2, wherein: The ultraviolet absorber includes at least one of 2-(2-hydroxy-5-methylphenyl)benzotriazole, 2-(3-tert-butyl-2-hydroxy-5-methylphenyl)-2H-5-chlorobenzotriazole, 2-(2'-hydroxy-5'-trioctylphenyl)benzotriazole and 2-hydroxy-4-n-octyloxybenzophenone.

4. The window according to claim 1, wherein: The window further comprises: an adhesive layer disposed below the hard coating layer; and a primer layer disposed between the adhesive layer and the hard coating layer, wherein the primer layer comprises silicon oxide and an ultraviolet absorber, and The ultraviolet absorber includes at least one of a salicylic acid-based compound, a benzophenone-based compound, a benzotriazole-based compound, a cyanoacrylate-based compound, a nickel phenol-based compound, and a hindered amine-based compound.

5. The window according to claim 1, wherein: The resin composition further includes an additive represented by Chemical Formula 1 or Chemical Formula 2: Chemical formula 1 Chemical formula 2 Wherein, in Chemical Formula 1 and Chemical Formula 2, R1 to R4 are each independently a hydrogen atom or an unsubstituted methyl group, n1 is an integer from 1 to 10, m1 and m2 are each independently an integer from 1 to 20, and The sum of m1 and m2 is 10 to 30.

6. The window according to claim 1, wherein: The window further comprises: a high refractive layer disposed on the hard coating layer and having a first refractive index of 1.6 or more; and A low-refractive layer is disposed on the high-refractive layer and has a second refractive index of 1.5 or less.

7. The window according to claim 6, wherein: The high refractive layer includes at least one of tin oxide, titanium oxide, zirconium oxide and sulfur atoms.

8. The window according to claim 6, wherein: The low-refractive layer includes hollow particles having an average diameter of 30 to 70 nanometers.

9. The window according to claim 6, wherein: The window further includes a functional layer disposed on the low-refractive layer and including a fluorine-containing compound.

10. A display device, wherein: The display device comprises: display panel; and A window is provided on the display panel, wherein the window comprises a polymer hard coating layer obtained from a resin composition comprising a photoinitiator, a fluorine-based compound, an acrylate-based compound and a reactive diluent, The acrylate-based compound includes at least one of polyester acrylate, epoxy acrylate, urethane acrylate and ethylene glycol acrylate, and The reactive diluent includes at least one of a polyester acrylate and a polyether acrylate having a molecular weight greater than 0 grams per mole and 1000 grams per mole or less.

11. The display device according to claim 10, wherein: The window further comprises: an adhesive layer disposed below the hard coating layer and in direct contact with the upper surface of the display panel; A high refractive layer is disposed on the hard coating layer; a low-refractive layer disposed on the high-refractive layer and having a refractive index lower than that of the high-refractive layer; and The functional layer is disposed on the low-refractive layer and includes a fluorine-containing compound.

12. The display device according to claim 11, wherein: The adhesive layer has a thickness of 10 μm to 100 μm, and The hard coating layer has a thickness of 50 μm to 100 μm.

13. The display device according to claim 10, wherein: The display device further includes an optical layer disposed between the display panel and the window, wherein the window further comprises a resin layer disposed below the hard coating layer and in direct contact with the optical layer, and The resin layer includes a polyethylene terephthalate film or a resin material cured by laser irradiation.

14. A display device, wherein: The display device comprises: A display module comprising a first non-folding area, a folding area, and a second non-folding area arranged along a first direction; and A window is provided on the display module, Wherein, the window comprises: an adhesive layer disposed directly on the display module; and a hard coating layer disposed on the adhesive layer, wherein the hard coating layer comprises a polymer obtained from a resin composition comprising a photoinitiator, a fluorine-based compound, an acrylate-based compound, a reactive diluent, and an ultraviolet absorber, and The reactive diluent includes at least one of polyester acrylate and polyether acrylate having a molecular weight greater than 0 g / mol and 1000 g / mol or less.

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