Display device

Abstract

This disclosure relates to a display device, including a display panel, a protective layer on the display panel, and a first adhesive layer between the display panel and the protective layer. The first adhesive layer may contain 0.05 wt% to 1 wt% of a silane coupling agent, and the first adhesive layer may have 20% or less creep at 60°C.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority and benefit to Korean Patent Application No. 10-2020-0128763, filed on October 6, 2020, with the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference. Technical Field

[0003] Embodiments of this disclosure relate to a display device, and, for example, to a display device comprising an adhesive layer containing a silane coupling agent. Background Technology

[0004] Recently, with the development of display-related technologies, display devices that can be deformed during use through methods such as folding, rolling (e.g., in a roll), or stretching (e.g., stretching like a rubber band) have been researched and developed. Because these displays can be modified in various forms, they can meet the needs of both expanding the display and reducing its size for portability during use.

[0005] When a display device is folded, the main stress is concentrated in the fold, and the components of the display device may be peeled off or damaged in the corresponding area. Furthermore, during the manufacturing process of the display device, components such as the adhesive layers may be pressed or stamped.

[0006] The information disclosed in this background section is intended only to enhance the understanding of the background of the invention and, therefore, may contain information that does not constitute prior art known to those skilled in the art in this country. Summary of the Invention

[0007] One or more embodiments of this disclosure provide a display device including an adhesive layer that has high reliability and low creep at high temperatures.

[0008] One or more embodiments of this disclosure provide a display device, including: a display panel; a protective layer located on the display panel; and a first adhesive layer located between the display panel and the protective layer, wherein the first adhesive layer contains 0.05 wt% to 1 wt% of a silane coupling agent, and the first adhesive layer has 20% or less creep at 60°C.

[0009] Silane coupling agents may include compounds represented by the following chemical formula 1:

[0010] Chemical Formula 1

[0011] R'-Si-(OR)3

[0012] Wherein, R' may represent one selected from C1 to C10 alkyl, vinyl, carboxyl, glycidoxyl, epoxy, glycidyl, amino, mercapto, acrylic acid, methacrylic acid, primary amino, secondary amino, tertiary amino, and quaternary amino, and each R may independently represent one selected from hydrogen, C1 to C10 alkyl, aryl, alkylaryl, aralkyl, alkenyl, cycloalkenyl, olefin, alkylene, arylene, alkylarylene, arylalkylene, and cycloalkylene.

[0013] The thickness of the first adhesive layer can be in the range of 25 μm to 100 μm.

[0014] The display panel may also include a display layer, a window, and a hard coating layer, and the hard coating layer and the first adhesive layer may be in direct contact with each other.

[0015] The display device may also include a second adhesive layer located between the display layer and the window, and the hard coating layer and the first adhesive layer may have different compositions.

[0016] The first adhesive layer may be located at the top of a plurality of adhesive layers included in the display device.

[0017] The first adhesive layer may include a pressure-sensitive adhesive (PSA).

[0018] The window may contain polyimide, and the first adhesive layer may have a peel force of 500 gf / in or greater relative to the window at room temperature (25°C).

[0019] The first adhesive layer can have a peel strength of 514 gf / in to 574 gf / in relative to the window at room temperature (25°C).

[0020] The window may contain polyimide, and the first adhesive layer may have a peel force of 300 gf / in or less relative to the window at 60°C.

[0021] The first adhesive layer can have a peel strength of 267 gf / in to 287 gf / in relative to the window at 60°C.

[0022] The first adhesive layer can have a storage modulus of 0.02 MPa to 0.035 MPa at 60°C.

[0023] The transition temperature of the first adhesive layer can be -30°C or lower.

[0024] The first adhesive layer can be a double-sided adhesive layer.

[0025] The display device can be foldable.

[0026] The radius of curvature of the foldable display device can be 1.5R or greater.

[0027] The display device may further include a polarizing layer located between the display layer and the window; a third adhesive layer located between the display layer and the polarizing layer; a thin film layer located on the surface of the display layer; and a fourth adhesive layer located between the display layer and the thin film layer.

[0028] The components of the third and fourth adhesive layers may differ from those of the first adhesive layer.

[0029] The display device may further include: a buffer layer located on the surface of the display layer; and a fifth adhesive layer for attaching the buffer layer and the display panel, wherein the hard coating layer and the first adhesive layer may have different compositions.

[0030] One or more embodiments of this disclosure provide a display device, comprising: a display panel; a protective layer disposed on the display panel; and a first adhesive layer disposed between the display panel and the protective layer, wherein the first adhesive layer may contain 0.05 wt% to 1 wt% of a compound represented by Chemical Formula 1, and the first adhesive layer may have a creep of 20% or less at 60°C.

[0031] Chemical Formula 1

[0032] R'-Si-(OR)3

[0033] Wherein, R' may represent one selected from C1 to C10 alkyl, vinyl, carboxyl, glycidyl etheroxy, epoxy, glycidyl, amino, mercapto, acrylic acid, methacrylic acid, primary amino, secondary amino, tertiary amino, and quaternary amino, and each R may independently represent one selected from hydrogen, C1 to C10 alkyl, aryl, alkylaryl, aralkyl, alkenyl, cycloalkenyl, olefin, alkylene, arylene, alkylarylene, arylalkylene, and cycloalkylene.

[0034] According to embodiments of this disclosure, a display device may be provided that includes an adhesive layer having high reliability and low creep at high temperatures. Attached Figure Description

[0035] Figure 1 This is a cross-sectional view of a display device according to one or more embodiments.

[0036] Figure 2 This diagram illustrates a process in which a silane coupling agent is combined with an inorganic material according to one or more embodiments.

[0037] Figure 3 This indicates the rework process used to remove the protective layer.

[0038] Figure 4 This refers to a display device according to one or more embodiments.

[0039] Figure 5 This is a cross-sectional view of a display device according to one or more embodiments. Detailed Implementation

[0040] The subject matter of this disclosure will be described more fully below with reference to the accompanying drawings, in which embodiments of the disclosure are illustrated. As those skilled in the art will recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of this disclosure, and can also be combined to obtain other embodiments.

[0041] In order to clearly describe the subject matter of this disclosure, parts that are not related to the description may be omitted, and the same reference numerals throughout the specification refer to the same or similar constituent elements.

[0042] Furthermore, for better understanding and ease of description, since the dimensions and thicknesses of the constituent components shown in the accompanying drawings can be arbitrarily given, this disclosure is not limited to the dimensions and thicknesses shown. In the drawings, the thicknesses of layers, films, panels, areas, etc., may be exaggerated for clarity. In the drawings, the thicknesses of some layers and areas may be exaggerated for better understanding and ease of description.

[0043] It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it may be directly on the other element or an intervening element may be present. Conversely, when an element is referred to as being "directly on" another element, no intervening element is present. Furthermore, in the specification, the terms "on" or "above" indicate being on or below the target part, and do not necessarily indicate being located on the upper side of the target part based on the direction of gravity.

[0044] Furthermore, unless explicitly stated otherwise, the word “including” and variations such as “including” or “contains” shall be understood to imply inclusion of the stated element but not exclusion of any other element.

[0045] Furthermore, in the instruction manual, the phrase "in a plan view" refers to the target part when viewed from above, and the phrase "in a cross-sectional view" refers to the cross-section of the target part when viewed from the side by cutting it vertically.

[0046] As used herein, expressions such as “at least one of…”, “one of…”, and “selected from”, when following a list of elements, modify the entire list of elements without modifying the individual elements in the list. For example, throughout this disclosure, the expression “at least one of a, b, or c” means only a, only b, only c, both a and b, both a and c, both b and c, all of a, b, and c, or variations thereof.

[0047] As used herein, the terms “substantially,” “approximately,” and similar terms are used as approximations and not as terms of degree, and are intended to describe an inherent deviation in the measured or calculated value that would be recognized by one of ordinary skill in the art. Taking into account the measurements discussed and the errors associated with a particular number of measurements (i.e., the limitations of the measurement system), as used herein, “approximately” or “substantially” includes the value and means within an acceptable range of deviation for that particular value as determined by one of ordinary skill in the art. For example, “approximately” could mean within one or more standard deviations, or within ±30%, ±20%, ±10%, ±5% of the value.

[0048] Within the scope of the references, any numerical ranges listed herein are intended to include all subranges of the same numerical precision. For example, the range “1.0 to 10.0” is intended to include all subranges between the listed minimum value of 1.0 and the listed maximum value of 10.0 (and includes the listed minimum value of 1.0 and the listed maximum value of 10.0), i.e., a minimum value equal to or greater than 1.0 and a maximum value equal to or less than 10.0, such as, for example, 2.4 to 7.6. Any maximum numerical limit listed herein is intended to include all lower numerical limits falling within it, and any minimum numerical limit listed in this specification is intended to include all higher numerical limits falling within it. Therefore, the applicant reserves the right to amend this specification, including the claims, to expressly list any subranges falling within the scope expressly listed herein.

[0049] It will be understood that although this document may use terms such as “first,” “second,” etc., to describe various components, these components should not be limited by these terms. These terms are used only to distinguish one component from another.

[0050] Expressions used in the singular include expressions used in the plural, unless they have a distinctly different meaning in the context.

[0051] It will be further understood that the terms “comprising” and / or “including” as used herein specify the presence of the said feature or element, but do not exclude the presence or addition of one or more other features or elements.

[0052] In the following, a display device according to one or more embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings.

[0053] Figure 1 A cross-sectional view of a display device according to one or more embodiments is shown. (Reference) Figure 1 A display device according to one or more embodiments includes a display panel 100 and a protective layer 300 attached to the display panel 100, and the protective layer 300 and the display panel 100 are attached by using a first adhesive layer 710.

[0054] In this case, the first adhesive layer 710 may include a pressure-sensitive adhesive (PSA). The first adhesive layer 710 may be a double-sided adhesive and may be used as the top layer in the module structure of the display device. For example, the first adhesive layer 710 may be an adhesive on its opposite sides. The first adhesive layer 710 according to one or more embodiments has high peel strength under high temperature and high humidity and may have low creep. As used herein, the term "creep" refers to the deformation that may occur for a specific period of time when a material is subjected to a certain stress at a certain temperature, and when creep is high, it refers to a greater deformation under the same stress.

[0055] The first adhesive layer 710 may include at least one of polyurethane-based, polypropylene-based, polyester-based, polyepoxy-based, and / or polyvinyl acetate-based materials.

[0056] The first adhesive layer 710 according to one or more embodiments may have a creep of 20% or less at 60°C. Furthermore, for windows having polyimide (PI), the first adhesive layer 710 according to one or more embodiments may have a peel force of 500 gf / in (grams per inch) or greater at room temperature (RT, 25°C), and a peel force of 300 gf / in or less at 60°C. For example, the first adhesive layer 710 according to one or more embodiments may have a peel force of 514 gf / in to 574 gf / in at room temperature (25°C), and a peel force of 267 gf / in to 287 gf / in at 60°C. In another embodiment, the first adhesive layer 710 may have a peel force of 230 gf / in to 260 gf / in at 60°C and 93% humidity.

[0057] The thickness of the first adhesive layer 710 can be in the range of 25 μm to 100 μm.

[0058] The storage modulus of the first adhesive layer 710 at 60°C can range from 0.02 MPa to 0.035 MPa. Therefore, it can reduce the stress on other adjacent layers.

[0059] Furthermore, the glass transition temperature of the first adhesive layer 710 can be -30°C or lower. Therefore, bending can occur well even at low temperatures (e.g., in a suitable or acceptable manner).

[0060] The first adhesive layer 710 may include a silane coupling agent (SCA). The silane coupling agent (which is a compound having two or more different reactive groups in its molecule to form a chemical bond between organic and / or inorganic materials) is formed to include reactive groups (OR) that are chemically bonded to the inorganic material and organic functional groups (R) that are bonded to the polymer, which act as a bridge between the organic and / or inorganic materials.

[0061] Silane coupling agents may include compounds represented by chemical formula 1.

[0062] Chemical Formula 1

[0063] R'-Si-(OR)3

[0064] In Formula 1, R' can refer to an alkyl group (e.g., methyl, ethane) having 1 to 10 carbon atoms. R' can be selected from C1 to C10 alkyl, vinyl, carboxyl, glycidyl etheroxy, epoxy, glycidyl, amino, mercapto, acrylic, and methacrylic acid groups. R' can contain a nitrogen atom and can be, for example, an amino group. The amino group can be a primary amino group, a secondary amino group, a tertiary amino group, or a quaternary amino group.

[0065] In Formula 1, each R can be independently selected from hydrogen, C1 to C10 alkyl, aryl, alkylaryl, aralkyl, alkenyl, cycloalkenyl, olefin, alkylene, arylene, alkylarylene, arylalkylene, and cycloalkylene. In one or more embodiments, each R can be an independent hydrogen or a straight-chain or branched C1 to C6 alkyl group.

[0066] In Formula 1, R' can be combined with organic materials, and at least one OR can be chemically combined with inorganic materials. For example, at least one OR of Formula 1 can be converted into a hydroxyl group, which can then react with an inorganic material to form a reaction product of hydroxyl group and inorganic material.

[0067] Because the compound of Formula 1 can be included in the first adhesive layer 710, the peel strength of the first adhesive layer 710, which has low creep, can be improved in high temperature and high humidity environments. Therefore, reliability can be ensured when the display device is folded.

[0068] Figure 2 This diagram illustrates a process in which a compound of Formula 1 according to one or more embodiments is combined with an inorganic material. (See diagram for example.) Figure 2 As shown, compounds according to one or more embodiments can be bonded to inorganic materials via hydrolysis and condensation reactions. Figure 2 As shown, the compound of Formula 1 according to one or more embodiments can, for example, be combined with an ultrathin glass (UTG) window and can increase the peel force between the UTG window and the first adhesive layer 710.

[0069] In one or more embodiments, the content (e.g., by weight) of the silane coupling agent included in the first adhesive layer 710 may be in the range of 0.05 wt% to 1 wt%. In one or more embodiments, the content (e.g., by weight) of the compound of Formula 1 may be in the range of 0.05 wt% to 1 wt%. When the content (e.g., by weight) of the compound of Formula 1 is less than 0.05 wt%, it may not have a sufficient effect on improving peel strength, and when the content (e.g., by weight) of the compound of Formula 1 is greater than 1 wt%, releaseability may increase due to reduced adhesion.

[0070] As described above, in a display device according to one or more embodiments, at the uppermost end of the display device, the first adhesive layer 710 may comprise a compound represented by Chemical Formula 1, and may have low creep (20% or less creep at 60°C) and high peel strength (300 gf / in or less at 60°C) at high temperatures. Therefore, it can be easily handled during the manufacturing process and can have high reliability in use.

[0071] If the protective layer 300 is not properly applied during the application of the display panel 100, a rework process to remove the protective layer 300 may be required. Figure 3 The rework process for removing the protective layer 300 is illustrated. Therefore, in one or more embodiments where the first adhesive layer 710 can be used to attach the protective layer 300, it is desirable to have low peel strength at high temperatures and high reliability in high-temperature and high-humidity environments. Furthermore, because the display device according to one or more embodiments is a foldable display device, adhesives with low modulus and high creep have been used to ensure reliability during folding. However, when using adhesives with high creep, the first adhesive layer 710 may be unsuitable due to external impacts or pushes during the manufacturing process. Additionally, because the peel strength at high temperatures may be low, there is a possibility that the display device may peel off when the temperature increases during use.

[0072] However, in the case of the display device according to one or more embodiments, the first adhesive layer 710 includes a compound represented by Chemical Formula 1 to improve peel strength and reduce creep in high temperature and high humidity environments. Therefore, pressing and embossing defects can be reduced during manufacturing, and peel strength can be improved in high temperature and high humidity environments, thereby increasing reliability in the usage environment.

[0073] Table 1 shows the results of measurements of individual item reliability and surface pressing characteristics for various examples and comparative examples of different creep and peel forces used for the first adhesive layer 710.

[0074] Table 1

[0075]

[0076] Individual reliability testing was performed 150,000 times by folding and unfolding the structure of the display panel / adhesive / polyimide window under conditions of 60°C and 93% humidity. As can be seen from Table 1, in Example 1, creep was as low as 20% or less, and the peel strength under high temperature and high humidity was high, and therefore it passed the reliability test, and the pressing depth was also the lowest.

[0077] In the case of Comparative Example 1, creep was greater than 90%, and peel strength was low under high temperature and high humidity, resulting in buckling and cohesion failure during reliability testing.

[0078] Similarly, in the case of Comparative Example 2, although the creep was at the 45% level, which was more than half lower than that of Comparative Example 1, the peel force under high temperature and high humidity was low, and therefore buckling occurred during the reliability test.

[0079] In the case of Comparative Example 3, creep was at a level similar to that of Example 1, but the peel force under high temperature and high humidity was low, and therefore buckling occurred during reliability testing.

[0080] For example, it can be seen that adhesives with a certain value or less creep and a certain value or greater peel force, as in Example 1, improve surface pressing properties and provide high reliability.

[0081] Figure 4 A display device according to one or more embodiments is shown. Reference Figure 4 The display device according to one or more embodiments can be a foldable display device. For example... Figure 4 As shown, because the protective layer 300 and the first adhesive layer 710 can be located on the uppermost layer, they can be bent and can be most susceptible to stress at the bend. However, because the display device according to one or more embodiments includes the first adhesive layer 710 with low creep and high peel strength, its reliability at the bend is excellent. Therefore, the display device including the first adhesive layer according to one or more embodiments is suitable for application in foldable display devices. For example, the first adhesive layer according to one or more embodiments can be applied to foldable display devices with a radius of curvature of 1.5R or greater, and can be applied to both inward and outward folding (e.g., the foldable display device can be folded toward the protective layer 300 and the first adhesive layer 710, or can be folded away from the protective layer 300 and the first adhesive layer 710).

[0082] In the following text, a detailed stacking structure of the display device according to one or more embodiments will be referred to. Figure 5 To describe in more detail. Figure 5 A cross-sectional view of a display device according to one or more embodiments is shown.

[0083] refer to Figure 5 A display device according to one or more embodiments includes a display panel 100, a support portion 200 located below the display panel 100, and a protective layer 300 located above the display panel 100. For better understanding and ease of description, the display panel 100, the support portion 200, and the protective layer 300 are shown as separate from each other, but in reality they can contact each other (e.g., physically contact) to connect with each other as a unit.

[0084] refer to Figure 5 The protective layer 300 and the display panel 100 can be attached via the first adhesive layer 710. The description of the first adhesive layer 710 is the same as described above, and therefore, its repeated description will not be repeated here. The thickness of the protective layer 300 can be in the range of 45 μm to 65 μm.

[0085] The display panel 100 may include a thin film layer 110, a display layer 120, a polarizing layer 130, a window 140, and a hard coating layer 150, and may include multiple adhesive layers located between the layers. The stacked structure of the display panel 100 is merely an example, and some structures may be omitted according to one or more embodiments. For example, the polarizing layer 130 may be omitted.

[0086] The thin film layer 110 and the display layer 120 can be attached using a fourth adhesive layer 740. In this case, the thickness of the fourth adhesive layer 740 can be in the range of 5 μm to 15 μm. The fourth adhesive layer 740 can have a composition and properties different from those of the first adhesive layer 710. That is, the first adhesive layer 710 can contain a compound represented by Chemical Formula 1 and have low creep properties and high peel strength, while the fourth adhesive layer 740 may not contain a compound represented by Chemical Formula 1 and may have creep properties and peel strength different from those of the first adhesive layer 710.

[0087] Display layer 120 can be a layer in which transistors and light-emitting elements are electrically coupled to substantially display an image. The thickness of display layer 120 can be in the range of 30 μm to 40 μm.

[0088] The display layer 120 and the polarizing layer 130 can be bonded using a third adhesive layer 730. The thickness of the third adhesive layer 730 can be in the range of 40 μm to 60 μm. The third adhesive layer 730 can have different components and properties than the first adhesive layer 710. For example, the first adhesive layer 710 can contain a compound represented by chemical formula 1 and have low creep properties and high peel strength, while the second adhesive layer 720 can not contain a compound represented by chemical formula 1 and can have different creep properties and peel strength than the first adhesive layer 710.

[0089] The thickness of the polarizing layer 130 can be in the range of 20 μm to 40 μm. According to one or more embodiments, the polarizing layer 130 may be omitted.

[0090] The polarizing layer 130 and the window 140 can be bonded using a second adhesive layer 720. The thickness of the second adhesive layer 720 can be in the range of 40 μm to 60 μm. The second adhesive layer 720 can have a composition and properties different from those of the first adhesive layer 710. For example, the first adhesive layer 710 can contain a compound represented by Chemical Formula 1 and have low creep properties and high peel strength, while the second adhesive layer 720 may not contain a compound represented by Chemical Formula 1 and may have creep properties and peel strength different from those of the first adhesive layer 710.

[0091] The hard coating 150 may be located on the window 140. The hard coating 150 may include an acrylic-based material. The thickness of the hard coating 150 may be in the range of 5 μm to 15 μm.

[0092] The support portion 200 includes a buffer layer 210, and a fifth adhesive layer 750 and a sixth adhesive layer 760 on opposite sides of the buffer layer 210. The buffer layer 210 may include polyurethane foam. The thickness of the buffer layer 210 may be in the range of 70 μm to 90 μm.

[0093] The buffer layer 210 and the thin film layer 110 can be attached via a fifth adhesive layer 750. The thickness of the fifth adhesive layer 750 can be in the range of 20 μm to 30 μm. The fifth adhesive layer 750 can have a composition and properties different from those of the first adhesive layer 710. For example, the first adhesive layer 710 can contain a compound represented by chemical formula 1 and have low creep properties and high peel strength, while the fifth adhesive layer 750 can not contain a compound represented by chemical formula 1 and can have creep properties and peel strength different from those of the first adhesive layer 710.

[0094] The thickness of the sixth adhesive layer 760 can be in the range of 20 μm to 30 μm. The sixth adhesive layer 760 can have components and properties different from those of the first adhesive layer 710. For example, the first adhesive layer 710 can contain a compound represented by Chemical Formula 1 and have low creep properties and high peel strength, while the sixth adhesive layer 760 may not contain a compound represented by Chemical Formula 1 and may have creep properties and peel strength different from those of the first adhesive layer 710.

[0095] As described above, in the display device according to one or more embodiments, the adhesive layer at the uppermost layer of the display device may contain a silane coupling agent represented by Chemical Formula 1, and may have low creep characteristics and high peel strength. Therefore, pressing defects that occur when creep is high during manufacturing can be minimized or reduced, and because the peel strength is high, reliability in the usage environment can be ensured. For example, at the folding portion of a foldable display device, the display panel and the protective layer can be stably bonded.

[0096] While the subject matter of this disclosure has been described in conjunction with embodiments now considered practical, it should be understood that this disclosure is not limited to the disclosed embodiments, but rather is intended to cover various modifications and equivalent arrangements and equivalents thereof that are included within the spirit and scope of this disclosure.

Claims

1. A display device, wherein the display device comprises: Display panel; A protective layer is located on the display panel; as well as A first adhesive layer is located between the display panel and the protective layer; A hard coating layer, wherein the hard coating layer and the first adhesive layer are in direct contact with each other. The first adhesive layer contains 0.05 wt% to 1 wt% of a silane coupling agent, and The first adhesive layer exhibits 20% or less creep at 60°C. The silane coupling agent includes compounds represented by the following chemical formula 1: Chemical Formula 1 R'-Si-(OR)3 Wherein, R' represents one selected from C1 to C10 alkyl, vinyl, carboxyl, glycidyl etheroxy, epoxy, glycidyl, amino, mercapto, acrylic, methacrylic acid, primary amino, secondary amino, tertiary amino, and quaternary amino groups, and Each R independently represents one selected from hydrogen, C1 to C10 alkyl, aryl, alkylaryl, aralkyl, alkenyl, cycloalkenyl, olefin, alkylene, arylene, alkylarylene, arylalkylene, and cycloalkylene. In chemical formula 1, R' is bonded to organic materials, and OR is chemically bonded to inorganic materials.

2. The display device according to claim 1, wherein, The thickness of the first adhesive layer is in the range of 25 μm to 100 μm.

3. The display device according to claim 1, wherein, The display panel also includes a display layer, a window, and a hard coating, and The hard coating and the first adhesive layer are in direct contact with each other.

4. The display device according to claim 3, wherein the display device further comprises a second adhesive layer located between the display layer and the window, and in, The hard coating layer has a different composition from the first adhesive layer.

5. The display device according to claim 1, wherein, The first adhesive layer is located at the top of the plurality of adhesive layers included in the display device.

6. The display device according to claim 1, wherein, The first adhesive layer comprises a pressure-sensitive adhesive.

7. The display device according to claim 3, wherein, The window comprises polyimide, and The first adhesive layer has a peel force of 500 gf / in or greater relative to the window at 25°C.

8. The display device according to claim 7, wherein, The first adhesive layer has a peel strength of 514 gf / in to 574 gf / in relative to the window at 25°C.

9. The display device according to claim 3, wherein, The window comprises polyimide, and Wherein, the first adhesive layer has a peel force of 300 gf / in or less relative to the window at 60°C, and The first adhesive layer has a storage modulus of 0.02 MPa to 0.035 MPa at 60°C.

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