Display device

Abstract

A display device is provided, comprising a display module defining a first non-foldable region and a second non-foldable region facing each other, and a foldable region located between the first and second non-foldable regions, and a heat sink disposed on one surface of the display module. The heat sink includes: a first heat-dissipating adhesive layer including a first adhesive portion overlapping the first non-foldable region and a second adhesive portion overlapping the second non-foldable region; a second heat-dissipating adhesive layer including a third adhesive portion overlapping the first adhesive portion and a fourth adhesive portion overlapping the second adhesive portion; a heat-dissipating layer including a first heat-dissipating portion disposed between the first adhesive portion and the third adhesive portion and a second heat-dissipating portion disposed between the second adhesive portion and the fourth adhesive portion; and an auxiliary adhesive layer including a first auxiliary adhesive portion disposed between the first adhesive portion and the third adhesive portion.

Description

[0001] Cross-references to related applications

[0002] This application claims priority and benefit to Korean Patent Application No. 10-2020-0018561, filed on February 14, 2020, which is incorporated herein by reference for all purposes as if fully set forth herein. Technical Field

[0003] Exemplary embodiments and examples of the present invention generally relate to display panels, and more specifically, to foldable display panels. Background Technology

[0004] The present invention relates to display devices, and more particularly, to foldable display devices.

[0005] Various display devices for use in multimedia devices, such as televisions, mobile phones, desktop computers, navigation devices, and game consoles, are under development. A display device may include a display module for displaying images and sensing external input, a polarizing layer disposed on a display panel, and a window. A display module may include a display panel for displaying images and an input sensing layer for sensing external input.

[0006] In addition, the display device can be located below the display module and may include a heat dissipation layer that dissipates heat within the display device.

[0007] The information disclosed in this background section is only for understanding the background technology of the inventive concept, and therefore may contain information that does not constitute prior art. Summary of the Invention

[0008] The present invention provides a display device that prevents the heat dissipation layer from moving.

[0009] Other features of the inventive concept will be set forth in the following description and will be apparent in part from the description or may be learned by practice of the inventive concept.

[0010] An embodiment of the present invention provides a display device comprising: a display module defining a folded region folded relative to a folding axis and a first non-folded region and a second non-folded region facing each other, with the folded region between the first and second non-folded regions; and a heat sink disposed on a surface of the display module, wherein the heat sink comprises: a first heat-dissipating adhesive layer including a first adhesive portion overlapping the first non-folded region and a second adhesive portion overlapping the second non-folded region; a second heat-dissipating adhesive layer including a third adhesive portion overlapping the first adhesive portion and a fourth adhesive portion overlapping the second adhesive portion; a heat-dissipating layer including a first heat-dissipating portion disposed between the first and third adhesive portions and a second heat-dissipating portion disposed between the second and fourth adhesive portions; and an auxiliary adhesive layer including a first auxiliary adhesive portion disposed between the first and third adhesive portions to surround the first heat-dissipating portion in a plane and a second auxiliary adhesive portion disposed between the second and fourth adhesive portions to surround the second heat-dissipating portion in a plane.

[0011] In one embodiment, the first heat dissipation portion may be sealed by a first adhesive portion, a third adhesive portion and a first auxiliary adhesive portion, and the second heat dissipation portion may be sealed by a second adhesive portion, a fourth adhesive portion and a second auxiliary adhesive portion.

[0012] In one embodiment, the first heat dissipation portion and the first auxiliary adhesive portion may be spaced apart from each other, and the second heat dissipation portion and the second auxiliary adhesive portion may be spaced apart from each other.

[0013] In an embodiment, each of the first auxiliary adhesive portion and the second auxiliary adhesive portion may include: a base layer; a first adhesive layer disposed between the base layer and the first heat-dissipating adhesive layer; and a second adhesive layer disposed between the base layer and the second heat-dissipating adhesive layer.

[0014] In an implementation, each of the first and second heat-dissipating adhesive layers may include a single adhesive layer.

[0015] In one embodiment, at least one sensor opening may be defined that passes through the first adhesive portion, the third adhesive portion, and the first auxiliary adhesive portion.

[0016] In an embodiment, the display device may further include at least one cover member disposed between the heat sink and the display module, wherein the sensor opening may pass through at least one cover member.

[0017] In one embodiment, the first heat dissipation portion may include a plurality of first openings spaced apart from each other, and the first adhesive portion and the third adhesive portion are attached to each other through the plurality of first openings; the second heat dissipation portion may include a plurality of second openings spaced apart from each other, and the second adhesive portion and the fourth adhesive portion are attached to each other through the plurality of second openings.

[0018] In one embodiment, each of the first adhesive portion and the third adhesive portion that overlaps with the plurality of first openings may have a recessed shape, and each of the second adhesive portion and the fourth adhesive portion that overlaps with the plurality of second openings may have a recessed shape.

[0019] In one embodiment, the thickness of the heat dissipation layer in the thickness direction of the display module can be greater than the sum of the thickness of the first heat dissipation adhesive layer and the thickness of the second heat dissipation adhesive layer.

[0020] In one embodiment, the first adhesive portion and the second adhesive portion may be spaced apart from each other, and the folding shaft is between the first adhesive portion and the second adhesive portion.

[0021] In some implementations, the heat sink may not overlap with the folded area.

[0022] In one embodiment, at least a portion of each of the first auxiliary adhesive portion and the second auxiliary adhesive portion may overlap with the folded area.

[0023] In an implementation, at least a portion of each of the first heat dissipation portion and the second heat dissipation portion may overlap with the folded area.

[0024] In an implementation, each of the first heat dissipation portion and the second heat dissipation portion may not overlap with the folded area.

[0025] In an embodiment, the display device may further include: a plate disposed between the display module and the first heat-dissipating adhesive layer; and an insulating film disposed below the second heat-dissipating adhesive layer.

[0026] In one embodiment, the board may include a first board overlapping the first adhesive portion and a second board spaced apart from the first board and overlapping the second adhesive portion, and the insulating film may include a first insulating film overlapping the first board and a second insulating film spaced apart from the first insulating film and overlapping the second board.

[0027] In one embodiment, the first heat dissipation portion may at least partially contact the first auxiliary adhesive portion.

[0028] In some embodiments, the heat dissipation layer may include a polyimide material.

[0029] In an embodiment, each of the first and second heat-dissipating adhesive layers may include a pressure-sensitive adhesive, and the auxiliary adhesive layer may include double-sided tape.

[0030] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative, and are intended to provide further explanation of the claimed invention. Attached Figure Description

[0031] The accompanying drawings are included to provide a further understanding of the inventive concept and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the inventive concept and, together with the description, serve to explain the principles of the inventive concept. In the drawings:

[0032] Figure 1A This is a perspective view illustrating a display device according to an embodiment of the concept of the present invention;

[0033] Figure 1B This is a perspective view illustrating a display device according to an embodiment of the concept of the present invention;

[0034] Figure 2 It is along the embodiment of the present invention. Figure 1A A sectional view taken by line A-A';

[0035] Figure 3 This is a cross-sectional view showing a display panel according to an embodiment of the concept of the present invention;

[0036] Figure 4 This is an exploded perspective view showing an embodiment of the second lower component according to the concept of the present invention;

[0037] Figure 5 This is a plan view showing a second lower component according to an embodiment of the concept of the present invention;

[0038] Figure 6A It is along the embodiments of the present invention. Figure 5 A sectional view taken by line I-I';

[0039] Figure 6B This is along another embodiment of the concept of the present invention. Figure 5 A sectional view taken by line I-I';

[0040] Figure 7 This illustrates an embodiment based on the concept of the present invention. Figure 5 A cross-sectional view of the adhesive sheet;

[0041] Figure 8 It is along the embodiments of the present invention. Figure 5 A sectional view taken from line II-II';

[0042] Figure 9 It is along the embodiments of the present invention. Figure 5 A sectional view taken from line III-III';

[0043] Figure 10 yes Figure 9 A magnified view of area AA;

[0044] Figure 11 This is a cross-sectional view showing a second lower member according to a folding operation, based on an embodiment of the concept according to the present invention;

[0045] Figure 12 This is a plan view showing a second lower component according to another embodiment of the concept of the present invention;

[0046] Figure 13A This is another embodiment of the concept of the present invention. Figure 12 A sectional view taken along line IV-IV'; and

[0047] Figure 13B This is a cross-sectional view showing an adhesive sheet according to another embodiment of the concept of the present invention. Detailed Implementation

[0048] In the following description, numerous specific details are set forth for illustrative purposes in order to provide a thorough understanding of various exemplary embodiments or embodiments of the invention. As used herein, “implementation” and “example” are interchangeable terms and are non-limiting examples of apparatus or methods employing one or more of the inventive concepts disclosed herein. However, it will be apparent that various exemplary embodiments may be practiced without these specific details or by one or more equivalent arrangements. In other instances, well-known structures and apparatuses are shown in block diagram form to avoid unnecessarily obscuring the various exemplary embodiments. Furthermore, the various exemplary embodiments may be different, but are not necessarily exclusive. For example, a particular shape, configuration, and characteristic of an exemplary embodiment may be used or implemented in another exemplary embodiment without departing from the inventive concept.

[0049] Unless otherwise stated, the exemplary embodiments described are to be understood as providing exemplary features of different details of some ways in which the inventive concept can be implemented in practice. Therefore, unless otherwise stated, features, components, modules, layers, films, panels, areas and / or aspects (hereinafter individually or collectively referred to as “elements”) of various embodiments may be combined, separated, interchanged and / or rearranged in other ways without departing from the inventive concept.

[0050] The use of crosshairs and / or shading in the accompanying drawings is generally used to clarify the boundaries between adjacent elements. Therefore, unless otherwise stated, the presence or absence of crosshairs or shading does not convey or indicate any preference or requirement for a particular material, material properties, size, scale, commonalities between the shown elements, and / or any other characteristics, properties, etc., of the elements. Furthermore, in the accompanying drawings, the dimensions and relative dimensions of elements may be exaggerated for clarity and / or descriptive purposes. A particular process sequence may be performed differently than the described sequence when exemplary embodiments can be implemented differently. For example, two consecutively described processes may be performed substantially simultaneously, or in the reverse order of the described sequence. Similarly, the same reference numerals denote the same elements.

[0051] When an element or layer is referred to as being on, connected to, or coupled to another element or layer, it can be directly on, directly connected to, or directly coupled to another element or layer, or there may be an intermediate element or layer. However, when an element or layer is referred to as being directly on, directly connected to, or directly coupled to another element or layer, there is no intermediate element or layer. Therefore, the term "connection" can refer to a physical connection, electrical connection, and / or fluid connection with or without an intermediate element. Furthermore, the DR1 axis, DR2 axis, and DR3 axis are not limited to the three axes of a Cartesian coordinate system, such as the x-axis, y-axis, and z-axis, and can be interpreted in a broader sense. For example, the DR1 axis, DR2 axis, and DR3 axis can be perpendicular to each other, or can represent different directions that are not perpendicular to each other. For the purposes of this disclosure, "at least one of X, Y, and Z" and "at least one selected from the group consisting of X, Y, and Z" can be interpreted as only X, only Y, only Z, or any combination of two or more of X, Y, and Z, such as, for example, XYZ, XYY, YZ, and ZZ.

[0052] Although the terms “first,” “second,” etc., may be used herein to describe various types of elements, these elements should not be limited by these terms. These terms are used to distinguish one element from another. Therefore, without departing from the teachings of this disclosure, the first element discussed below may be referred to as the second element.

[0053] Spatial relative terms such as “below,” “under,” “below,” “lower,” “above,” “upper,” “above,” “higher,” and “side” (e.g., as in “sidewall”) may be used herein for descriptive purposes and thus to describe the relationship between one element (or multiple elements) and another element (or multiple elements) as shown in the accompanying drawings. In addition to the orientations depicted in the drawings, spatial relative terms are intended to encompass different orientations of the device in use, operation, and / or manufacture. For example, if the device in the drawings is flipped, an element described as being below or beneath other elements or features will subsequently be oriented above those other elements or features. Thus, the exemplary term “below” can include both above and below orientations. Furthermore, the device may be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and therefore, the spatial relative descriptive terms used herein should be interpreted accordingly.

[0054] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” are intended to include the plural forms as used herein. Furthermore, the terms “comprises,” “comprising,” “includes,” and / or “including,” when used in this specification, designate the presence of the described features, integrals, steps, operations, elements, components, and / or groups thereof, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximations, not as terms of degree, and thus to allow for inherent deviations in measured, calculated, and / or provided values ​​that would be recognized by those skilled in the art.

[0055] This document describes various exemplary embodiments with reference to cross-sectional and / or exploded views as schematic diagrams of idealized exemplary embodiments and / or intermediate structures. Thus, differences from the illustrated shapes due to, for example, manufacturing techniques and / or tolerances should be anticipated. Therefore, the exemplary embodiments disclosed herein should not necessarily be interpreted as limited to the specific shapes of the areas shown, but should include deviations in shape due to, for example, manufacturing processes. In this way, the areas shown in the figures can be substantially schematic, and the shapes of these areas may not reflect the actual shapes of the areas of the device, and are therefore not necessarily intended to be limiting.

[0056] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. Terms, such as those defined in commonly used dictionaries, shall be interpreted as having a meaning consistent with their meaning in the context of the relevant field and shall not be interpreted in an idealized or overly formalized sense, unless expressly so defined herein.

[0057] In this specification, it will also be understood that when a component (or area, layer, part) is referred to as being on, connected to, or linked to another component, it may be directly disposed on, directly connected to, or directly linked to that component, or there may be a third component in between.

[0058] The same reference numerals always denote the same elements. Furthermore, for clarity, the thickness, scale, and dimensions of parts are exaggerated in the accompanying drawings.

[0059] The term “and / or” includes any and all combinations of one or more of the related listed items.

[0060] It should be understood that although terms such as “first” and “second” are used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one component from others. For example, an element referred to as a first element in one embodiment may be referred to as a second element in another embodiment without departing from the scope of the appended claims. Unless otherwise stated, singular terms may include plural forms.

[0061] In addition, terms such as "below," "under," "above," and "upper" are used to describe the relationships between the components shown in the accompanying drawings. These terms can be relative concepts and are described based on the directions expressed in the drawings.

[0062] The meaning of "include" or "comprise" specifies a property, fixed number, step, operation, element, component, or combination thereof, but does not exclude other properties, fixed numbers, steps, operations, elements, components, or combinations thereof.

[0063] In the following description, exemplary embodiments of the inventive concept will be described with reference to the accompanying drawings.

[0064] Figure 1A This is a perspective view illustrating a display device according to an embodiment of the concept of the present invention. Figure 1B This is a perspective view illustrating a display device according to an embodiment of the concept of the present invention. Figure 1A The unfolded state of the display device 1000 is shown, and Figure 1BThe folded state of the display device 1000 is shown.

[0065] refer to Figure 1A and Figure 1B The display device 1000 can be a device activated by an electrical signal. For example, the display device 1000 can be a mobile phone, tablet PC, car navigation system, game console, or wearable device, but is not limited to these. Figure 1A In this example, display device 1000 is shown as a mobile phone.

[0066] The display device 1000 can display images through the effective area 1000A. In the unfolded state of the display device 1000, the effective area 1000A may include a plane defined by a first direction DR1 and a second direction DR2. The thickness direction of the display device 1000 may be parallel to a third direction DR3 intersecting the first direction DR1 and the second direction DR2. Therefore, the front surface (or top surface) and rear surface (or bottom surface) of each component constituting the display device 1000 can be defined based on the third direction DR3.

[0067] The effective area 1000A may include a first area 1000A1, a second area 1000A2, and a third area 1000A3. The second area 1000A2 may be bent or folded relative to a folding axis FX extending along the second direction DR2. Therefore, the first area 1000A1 may be referred to as the first non-folding area, the third area 1000A3 may be referred to as the second non-folding area, and the second area 1000A2 may be referred to as the folding area. The non-folding areas 1000A1 and 1000A3 are configured not to fold within their respective structures, but rather to fold around the folding axis FX.

[0068] When the display device 1000 is folded, the first area 1000A1 and the third area 1000A3 can face each other. Therefore, in the fully folded state, the effective area 1000A can be concealed from the outside, which can be referred to as inward folding. However, this is merely an example, and the operation of the display device 1000 is not limited to this.

[0069] For example, in an embodiment of the present invention, when the display device 1000 is folded, the first region 1000A1 and the third region 1000A3 can be opposite each other. Therefore, in the folded state, the effective region 1000A can be exposed to the outside, which can be referred to as outward folding.

[0070] Display device 1000 can be configured to perform only one of the inward folding and outward folding operations. Alternatively, display device 1000 can be configured to perform both inward folding and outward folding operations. In this case, the same area of ​​display device 1000, such as the second area 1000A2, can be folded inward and outward. Alternatively, one area of ​​display device 1000 can be folded inward, and another area can be folded outward.

[0071] exist Figure 1A and Figure 1B The diagram illustrates one folded area and two non-folded areas, but the number of folded and non-folded areas is not limited to this. For example, the display device 1000 may include more than two folded areas, i.e., multiple non-folded areas and multiple folded areas disposed between adjacent non-folded areas.

[0072] Figure 1A and Figure 1B The diagram shows the folding axis FX parallel to the short axis of the display device 1000 from one long side to the other, but embodiments of the present invention are not limited thereto. For example, the folding axis FX may extend along the long axis of the display device 1000 from one short side to the other, for example, in a direction parallel to the first direction DR1. In this case, the first region 1000A1, the second region 1000A2, and the third region 1000A3 may be arranged sequentially along the second direction DR2.

[0073] Multiple sensing areas 100SA1, 100SA2, and 100SA3 can be defined on the display device 1000. Figure 1A The example shows three sensing regions 100SA1, 100SA2 and 100SA3, but the number of sensing regions 100SA1, 100SA2 and 100SA3 is not limited to this.

[0074] The multiple sensing areas 100SA1, 100SA2, and 100SA3 may include a first sensing area 100SA1, a second sensing area 100SA2, and a third sensing area 100SA3. For example, the first sensing area 100SA1 may overlap with the camera module, and the second sensing area 100SA2 and the third sensing area 100SA3 may overlap with a proximity sensor or an illumination sensor, but are not limited thereto.

[0075] The electronic modules corresponding to the camera module and various sensors can receive external input transmitted through the first sensing area 100SA1, the second sensing area 100SA2 or the third sensing area 100SA3, or can provide output through the first sensing area 100SA1, the second sensing area 100SA2 or the third sensing area 100SA3.

[0076] A first sensing area 100SA1 may be surrounded by an effective area 1000A, and a second sensing area 100SA2 and a third sensing area 100SA3 may be included within the effective area 1000A. That is, the second sensing area 100SA2 and the third sensing area 100SA3 can display images. The transmittance of each of the first sensing area 100SA1, the second sensing area 100SA2, and the third sensing area 100SA3 may be greater than the transmittance of the effective area 1000A. Furthermore, the first sensing area 100SA1 may have a transmittance greater than that of each of the second sensing area 100SA2 and the third sensing area 100SA3.

[0077] Figure 2 It is along the embodiments of the present invention. Figure 1A A sectional view taken by line A-A'. Figure 3 This is a cross-sectional view showing a display panel according to an embodiment of the present invention.

[0078] Reference Figure 2 The display device 1000 may include a display module 100, an upper functional layer, and a lower functional layer.

[0079] Reference Figure 3 The display module 100 can be configured to generate images and sense input applied from the outside. For example, the display module 100 may include a display panel 110 and an input sensing layer 120. The display module 100 may have a thickness of about 30 micrometers, and the thickness of the display module 100 is not limited to this.

[0080] The display panel 110 can be basically configured to generate images. The display panel 110 can be an emissive display layer, for example, an organic light-emitting display layer, a quantum dot display layer, or a micro LED display layer.

[0081] The display panel 110 may include a base layer 111, a circuit layer 112, a light-emitting element layer 113, and an encapsulation layer 114.

[0082] The base layer 111 may include a synthetic resin layer. The synthetic resin layer may include a thermosetting resin. The base layer 111 may have a multilayer structure. For example, the base layer 111 may have a three-layer structure consisting of a synthetic resin layer, an adhesive layer, and a synthetic resin layer. In particular, the synthetic resin layer may be a polyimide resin layer, and its material is not particularly limited. The synthetic resin layer may include at least one of acrylic resins, methacrylate resins, polyisoprene resins, vinyl resins, epoxy resins, urethane resins, cellulose resins, siloxane resins, polyamide resins, and dinaphthalene-based phenyl resins. Furthermore, the base layer 111 may include a glass substrate or an organic / inorganic composite substrate.

[0083] Circuit layer 112 may be disposed on base layer 111. Circuit layer 112 may include insulating layers, semiconductor patterns, conductive patterns, and signal lines. The insulating layer, semiconductor layer, and conductive layer may be formed on base layer 111 by means such as coating or vapor deposition, and then the insulating layer, semiconductor layer, and conductive layer may be selectively patterned by multiple photolithography processes. Subsequently, semiconductor patterns, conductive patterns, and signal lines included in circuit layer 112 may be formed.

[0084] The light-emitting element layer 113 may be disposed on the circuit layer 112. The light-emitting element layer 113 may include a light-emitting element. For example, the light-emitting element layer 113 may include an organic light-emitting material, a quantum dot, a quantum rod, or a micro LED.

[0085] The encapsulation layer 114 may be disposed on the light-emitting element layer 113. The encapsulation layer 114 may include inorganic layers, organic layers and inorganic layers stacked in sequence, but the layers constituting the encapsulation layer 114 are not limited to these.

[0086] The inorganic layer protects the light-emitting element layer 113 from moisture and oxygen, while the organic layer protects it from foreign substances such as dust particles. The inorganic layer may include a silicon nitride layer, a silicon oxynitride layer, a silicon oxide layer, a titanium oxide layer, or an aluminum oxide layer. The organic layer may include an acrylic-based organic layer, but embodiments of the invention are not limited thereto.

[0087] An input sensing layer 120 may be disposed on the display panel 110. The input sensing layer 120 can sense external input applied from the outside. External input may be user input. User input may include various types of external input, such as a part of the user's body, light, heat, pen, pressure, etc.

[0088] The input sensing layer 120 can be disposed on the display panel 110 through a continuous process. In this case, the input sensing layer 120 can be represented as being directly disposed on the display panel 110. Direct disposal may mean that a third component (such as an adhesive member or other layer) is not disposed between the input sensing layer 120 and the display panel 110.

[0089] Optionally, the input sensing layer 120 can be attached to the display panel 110 via an adhesive component. The adhesive component may include a general-purpose adhesive or glue.

[0090] Refer again Figure 2 The upper functional layer can be disposed on the display module 100. For example, the upper functional layer may include an anti-reflective component 200 and an upper component 300.

[0091] The anti-reflective member 200 may be referred to as an anti-reflective layer. The anti-reflective member 200 can reduce the reflectivity of external light incident from the outside. The anti-reflective member 200 may comprise a stretched synthetic resin film. For example, the anti-reflective member 200 can be provided by dyeing an iodine compound onto a polyvinyl alcohol (PVA) film. However, this is merely an example, and the materials constituting the anti-reflective member 200 are not limited thereto. The anti-reflective member 200 may have a thickness of approximately 31 micrometers, and the thickness of the anti-reflective member 200 is not limited thereto.

[0092] The anti-reflective component 200 can be bonded to the display module 100 via a first adhesive layer 1010. The first adhesive layer 1010 can be a transparent adhesive layer, such as a pressure-sensitive adhesive film (PSA), an optically clear adhesive film (OCA), or an optically clear resin (OCR). In the following, the adhesive component may include a general-purpose adhesive or glue. The first adhesive layer 1010 may have a thickness of approximately 25 micrometers, and the thickness of the first adhesive layer 1010 is not limited thereto.

[0093] In embodiments of the present invention, the first adhesive layer 1010 can be omitted. In this case, the anti-reflective member 200 can be directly disposed on the display module 100. In the case of the display module 100, a separate adhesive layer may not be required between the anti-reflective member 200 and the display module 100.

[0094] The upper component 300 can be disposed on the anti-reflective component 200. The upper component 300 includes a first hard coating layer 310, a protective layer 320, a first upper adhesive layer 330, a window 340, a second upper adhesive layer 350, a light-blocking layer 360, an impact-absorbing layer 370, and a second hard coating layer 380. The components included in the upper component 300 are not limited to the above-mentioned components. At least some of the above-mentioned components may be omitted, and other components may be added.

[0095] The first hard coating 310 may be a layer disposed on the outermost surface of the display device 1000. The first hard coating 310 may be a functional layer configured to improve the usability characteristics of the display device 1000, and may be coated onto the protective layer 320. For example, the first hard coating 310 may improve fingerprint resistance, stain resistance, and scratch resistance.

[0096] A protective layer 320 may be disposed beneath the first hard coating layer 310. Components disposed beneath the protective layer 320 may be protected by the protective layer 320. The first hard coating layer 310, an anti-fingerprint layer, etc., may be additionally disposed on the protective layer 320 to improve properties such as chemical resistance and abrasion resistance. The protective layer 320 may comprise a film having an elastic modulus of about 15 GPa or lower at room temperature. The protective layer 320 may have a thickness of about 55 micrometers, but the thickness of the protective layer 320 is not limited to this. In some embodiments, the protective layer 320 may be omitted.

[0097] The first upper adhesive layer 330 may be disposed below the protective layer 320. The protective layer 320 and the window 340 may be attached to each other through the first upper adhesive layer 330. The first upper adhesive layer 330 may have a thickness of about 25 micrometers, but the thickness of the first upper adhesive layer 330 is not limited to this.

[0098] Window 340 may be disposed below the first upper adhesive layer 330. Window 340 may include an optically transparent insulating material. For example, window 340 may include a glass substrate or a synthetic resin film. When window 340 is a glass substrate, window 340 may have a thickness of about 80 micrometers or less, and may have a thickness of, for example, about 30 micrometers, but the thickness of window 340 is not limited thereto.

[0099] When window 340 is a synthetic resin film, window 340 may include a polyimide (P1) film or a polyethylene terephthalate (PET) film.

[0100] Window 340 may have a single-layer structure or a multi-layer structure. For example, window 340 may include multiple plastic films bonded together by using an adhesive, or it may include a glass substrate and plastic films bonded together by using an adhesive.

[0101] The second upper adhesive layer 350 can be disposed below the window 340. The window 340 and the impact-absorbing layer 370 can be attached to each other through the second upper adhesive layer 350. The second upper adhesive layer 350 can have a thickness of about 35 micrometers, but the thickness of the second upper adhesive layer 350 is not limited to this.

[0102] In an embodiment of the present invention, the sidewall 340S of the window 340 and the sidewall 350S of the second upper adhesive layer 350 can be disposed inside the sidewalls of other layers (e.g., the sidewall 100S of the display module 100 and the sidewall 320S of the protective layer 320). Disposing inside can mean being closer to the effective area 1000A than other objects.

[0103] The positional relationship between the layers can change due to the folding operation of the display device 1000. According to an embodiment of the present invention, because the sidewall 340S of the window 340 is disposed inside the sidewall 100S of the display module 100 and the sidewall 320S of the protective layer 320, the possibility of the sidewall 340S of the window 340 protruding from the sidewall 320S of the protective layer 320 can be reduced even if the positional relationship between the layers changes. Therefore, the possibility of external impacts being transmitted through the sidewall 340S of the window 340 can be reduced. As a result, the possibility of cracks appearing in the window 340 can be reduced.

[0104] The first distance 340W between the sidewall 340S of window 340 and the sidewall 320S of protective layer 320 can be greater than or equal to a predetermined distance. Here, the first distance 340W can refer to the distance in a direction parallel to the first direction DR1. Furthermore, when viewed in a plane, the first distance 340W can correspond to the distance between sidewall 340S and sidewall 320S.

[0105] The first distance 340W can be approximately 196 micrometers, but is not limited to this. For example, the first distance 340W can be approximately 50 micrometers or greater, and can be approximately 300 micrometers. As the first distance 340W increases, the protective layer 320 can protrude further from the window 340, and a portion of the protective layer 320 can be bent and attached to other components, such as the housing. Moreover, as the surface area of ​​the protective layer 320 increases, the likelihood of foreign matter introduced from the upper side of the protective layer 320 being introduced to the lower side of the protective layer 320 can be reduced.

[0106] Furthermore, the window 340 and the second upper adhesive layer 350 can be bonded to the impact-absorbing layer 370 via a lamination process. Considering lamination process tolerances, each of the window 340 and the second upper adhesive layer 350 can have a smaller surface area than the impact-absorbing layer 370. Additionally, the surface area of ​​the second upper adhesive layer 350 can be smaller than the surface area of ​​the window 340. For example, in the process of attaching the window 340, pressure can be applied to the second upper adhesive layer 350. The second upper adhesive layer 350 can receive the pressure and then be stretched in a direction parallel to the first direction DR1 and the second direction DR2. Here, the second upper adhesive layer 350 can have a smaller surface area than the window 340, such that the second upper adhesive layer 350 does not protrude from the window 340.

[0107] Unlike the embodiments of the present invention, when the first upper adhesive layer 330 and the second upper adhesive layer 350 are attached to each other, the window 340 can remain stationary to prevent buckling when the display device 1000 is folded. However, according to the embodiments of the present invention, the second upper adhesive layer 350 can have a smaller surface area than the window 340. Therefore, the first upper adhesive layer 330 can be left unattached to the second upper adhesive layer 350, and the possibility of foreign matter adhering to the second upper adhesive layer 350 can be reduced.

[0108] The second distance 350W between the sidewall 350S of the second upper adhesive layer 350 and the sidewall 320S of the protective layer 320 can be greater than or equal to a predetermined distance. Here, the second distance 350W can refer to the distance in a direction parallel to the first direction DR1. Furthermore, when viewed in a plane, the second distance 350W can correspond to the distance between the sidewall 350S and the sidewall 320S.

[0109] The second distance 350W can be approximately 392 micrometers, but is not limited to this. For example, the second distance 350W can be selected from a range between approximately 292 micrometers and approximately 492 micrometers, but is not limited to this range.

[0110] A light-blocking layer 360 may be disposed between the impact-absorbing layer 370 and the second upper adhesive layer 350. The light-blocking layer 360 may be formed by printing on the top surface of the impact-absorbing layer 370. The light-blocking layer 360 may overlap with the peripheral region 1000NA. The light-blocking layer 360 may be a colored layer and may be formed by coating. The light-blocking layer 360 may include colored organic materials or opaque metals, and the materials constituting the light-blocking layer 360 are not limited to these.

[0111] exist Figure 2 In this embodiment, the light-blocking layer 360 is exemplarily shown as being disposed on the top surface of the impact-absorbing layer 370, but the location of the light-blocking layer 360 is not limited thereto. For example, the light-blocking layer 360 may be disposed on the top surface of the protective layer 320, the bottom surface of the protective layer 320, the top surface of the window 340, or the bottom surface of the window 340. Furthermore, the light-blocking layer 360 may be provided as multiple layers. In this case, a portion of the light-blocking layer 360 may be disposed on the top surface of the impact-absorbing layer 370, and another portion may be disposed on the top surface of the protective layer 320, the bottom surface of the protective layer 320, the top surface of the window 340, or the bottom surface of the window 340.

[0112] The shock-absorbing layer 370 can be a functional layer configured to protect the display module 100 from external impacts. The shock-absorbing layer 370 can be selected from films having an elastic modulus of about 1 GPa or greater at room temperature. The shock-absorbing layer 370 can be a stretched film including optical functions. For example, the shock-absorbing layer 370 can be an optical axis control film. The shock-absorbing layer 370 can have a thickness of about 41 micrometers, but the thickness of the shock-absorbing layer 370 is not limited to this. In embodiments of the present invention, the shock-absorbing layer 370 can be omitted.

[0113] The second hard coating 380 can be disposed on the surface of the impact absorbing layer 370. The impact absorbing layer 370 may include a curved surface. The top surface of the impact absorbing layer 370 can contact the second upper adhesive layer 350. Therefore, the curved portion of the top surface of the impact absorbing layer 370 can be filled by the second upper adhesive layer 350. Therefore, no optical problems occur on the top surface of the impact absorbing layer 370. The bottom surface of the impact absorbing layer 370 can be planarized by the second hard coating 380. Since the second hard coating 380 covers the surface of the impact absorbing layer 370, haze can be prevented from appearing on the surface of the impact absorbing layer 370.

[0114] The upper component 300 can be bonded to the antireflective component 200 via a second adhesive layer 1020. The second adhesive layer 1020 may include a general-purpose adhesive or glue. The second adhesive layer 1020 may have a thickness of about 25 micrometers, and the thickness of the second adhesive layer 1020 is not limited thereto.

[0115] The lower functional layer can be located below the display module 100. Specifically, the lower functional layer may include a lower protective film 400, a buffer member 500, a first lower member 600, a second lower member 700, and a step compensation member 800. The components included in the lower functional layer are not limited to the aforementioned components. At least some of the aforementioned components may be omitted, and other components may be added.

[0116] The lower protective film 400 can be bonded to the rear surface of the display module 100 via the third adhesive layer 1030. The lower protective film 400 prevents scratches from forming on the rear surface of the display module 100 during the manufacturing process. The lower protective film 400 can be a colored polyimide film. For example, the lower protective film 400 can be an opaque yellow film, but is not limited thereto.

[0117] The lower protective film 400 may have a thickness of approximately 40 micrometers, and the third adhesive layer 1030 may have a thickness of 18 micrometers. However, the thickness of the lower protective film 400 and the thickness of the third adhesive layer 1030 are not limited thereto.

[0118] The buffer member 500 can be disposed below the lower protective film 400. The buffer member 500 can protect the display module 100 from impacts transmitted from the lower part. The impact resistance of the display device 1000 can be improved by the buffer member 500.

[0119] The buffer member 500 may include a first buffer adhesive layer 510, a barrier film 520, a buffer layer 530, and a second buffer adhesive layer 540. The components included in the buffer member 500 are not limited to those described above. At least some of the aforementioned components may be omitted, and other components may be added.

[0120] The first buffer adhesive layer 510 and the second buffer adhesive layer 540 may comprise a general-purpose adhesive or glue. The first buffer adhesive layer 510 may be attached to the lower protective film 400, and the second buffer adhesive layer 540 may be attached to the first lower member 600. The first buffer adhesive layer 510 may have a thickness of approximately 25 micrometers, and the second buffer adhesive layer 540 may have a thickness of 8 micrometers. However, the thickness of each of the first buffer adhesive layer 510 and the second buffer adhesive layer 540 is not limited thereto.

[0121] The barrier film 520 may be configured to improve impact resistance. The barrier film 520 may be used to prevent deformation of the display module 100. The barrier film 520 may be a synthetic resin film, such as a polyimide film, but is not limited thereto. The barrier film 520 may have a thickness of approximately 35 micrometers, but its thickness is not limited thereto.

[0122] The buffer layer 530 may include, for example, foamed foam or sponge. The foamed foam may include polyurethane foam or thermoplastic polyurethane foam. When the buffer layer 530 includes foamed foam, it can be formed by using a barrier film 520 as a base layer. For example, a foaming agent can be applied to the barrier film 520 to form the buffer layer 530.

[0123] The buffer layer 530 may have a thickness of about 100 micrometers, but the thickness of the buffer layer 530 is not limited to this.

[0124] At least one of the blocking film 520 and the buffer layer 530 may have a light-absorbing color. For example, at least one of the blocking film 520 and the buffer layer 530 may be black. In this case, the component disposed below the buffer member 500 can be prevented from being seen from the outside.

[0125] The first lower member 600 may be disposed below the buffer member 500. The first lower member 600 may include a plate 610, a lower adhesive layer 620, and a cover layer 630. The components included in the first lower member 600 are not limited to the above-described components. At least some of the above-described components may be omitted, and other components may be added.

[0126] The plate 610 may comprise a material having an elastic modulus of about 60 GPa or greater at room temperature. For example, the plate 610 may be SUS304, but is not limited thereto. The plate 610 may support components disposed on the upper side. Furthermore, the plate 610 may improve the heat dissipation performance of the display device 1000.

[0127] The opening 611 may be defined in a portion of the plate 610. The opening 611 may be defined in the region that overlaps with the second region 1000A2. In a plane, the opening 611 may overlap with the second region 1000A2, for example, when viewed in the third direction DR3, a portion of the plate 610 may be more easily deformed due to the opening 611.

[0128] The cover layer 630 can be attached to the plate 610 via the lower adhesive layer 620. The lower adhesive layer 620 may include a general-purpose adhesive or glue. The cover layer 630 can cover the opening 611 of the plate 610. Therefore, it can also prevent foreign substances from entering the opening 611.

[0129] The cover layer 630 may include a material having a lower elastic modulus than that of the plate 610. For example, the cover layer 630 may include, but is not limited to, thermoplastic polyurethane.

[0130] The plate 610 may have a thickness of about 150 micrometers, the lower adhesive layer 620 may have a thickness of about 8 micrometers, and the cover layer 630 may have a thickness of about 8 micrometers. However, the thickness of the plate 610, the thickness of the lower adhesive layer 620, and the thickness of the cover layer 630 are not limited to the values ​​mentioned above.

[0131] The second lower member 700 may be disposed below the first lower member 600. According to an embodiment of the present invention, the second lower member 700 may include a first portion and a second portion, the first portion and the second portion being spaced apart from each other, and a folding axis FX being located between the first portion and the second portion. The first portion may overlap with a first region 1000A1, and the second portion may overlap with a third region 1000A3. For example, the first portion and the second portion may be spaced apart from each other, and a second region 1000A2 may be located between the first portion and the second portion. In this case, as... Figure 2 As shown, the second lower member 700 can have a non-overlapping structure in the second region 1000A2.

[0132] The second lower component 700 can be attached to the first lower component 600 via a fourth adhesive layer 1040. For example, one fourth adhesive layer 1040 can be attached to the bottom surface of the first lower component 600 that overlaps with the first region 1000A1, and another fourth adhesive layer 1040 can be attached to the bottom surface of the first lower component 600 that overlaps with the third region 1000A3. That is, the fourth adhesive layer 1040 may not overlap with the second region 1000A2. Each fourth adhesive layer 1040 may have a thickness of approximately 8 micrometers, but the thickness of each fourth adhesive layer 1040 is not limited to this.

[0133] Although not shown, a step compensation membrane may be further provided between the second lower member 700 and the first lower member 600. For example, the step compensation membrane may be provided in the region overlapping with the second region 1000A2. One surface of the step compensation membrane may have a weaker adhesive force than the other surface. For example, one surface may have no adhesive force. One surface may be the surface facing the first lower member 600.

[0134] Figure 4 This is an exploded perspective view showing a second lower member 700 according to an embodiment of the present invention. In the following text, reference will be made to... Figure 2 and Figure 4 The second lower component 700 is described in more detail.

[0135] The second lower component 700 may include a lower plate 710, a heat sink 720, and an insulating film 730.

[0136] A lower plate 710 is disposed between the first lower member 600 and the heat sink 720. The lower plate 710 includes a first plate 711 overlapping with the first region 1000A1 and a second plate 712 overlapping with the third region 1000A3. According to an embodiment, the first plate 711 and the second plate 712 may be spaced apart from each other, and the second region 1000A2 is located between the first plate 711 and the second plate 712.

[0137] The lower plate 710 can be used to prevent the component located above the second lower member 700 from being deformed by the component located below the second lower member 700.

[0138] For example, the lower plate 710 may include a metal alloy, such as a copper alloy. However, the materials constituting the lower plate 710 are not limited to this. The lower plate 710 may have a thickness of about 80 micrometers, and the thickness of the lower plate 710 is not limited to this.

[0139] A heat sink 720 can be disposed between the lower plate 710 and the insulating film 730. The heat sink 720 can be attached to the lower portion of the lower plate 710 and to the upper portion of the insulating film 730. According to the present invention, the heat sink 720 can be a heat-conducting sheet with high thermal conductivity.

[0140] In detail, the heat sink 720 may include a heat dissipation layer 721, a first heat dissipation adhesive layer 722, a second heat dissipation adhesive layer 723, and an auxiliary adhesive layer 724.

[0141] The first heat-dissipating adhesive layer 722 can be disposed below the lower plate 710 and can be attached to the bottom surface of the lower plate 710. The first heat-dissipating adhesive layer 722 may include a first adhesive portion 722a overlapping the first region 1000A1 and a second adhesive portion 722b overlapping the third region 1000A3. According to an embodiment, the first adhesive portion 722a and the second adhesive portion 722b may be spaced apart from each other, and the second region 1000A2 is located between the first adhesive portion 722a and the second adhesive portion 722b.

[0142] The second heat-dissipating adhesive layer 723 can be disposed on the insulating film 730 and attached to the top surface of the insulating film 730. The second heat-dissipating adhesive layer 723 may include a third adhesive portion 723a overlapping the first region 1000A1 and a fourth adhesive portion 723b overlapping the third region 1000A3. The third adhesive portion 723a may correspond to the first adhesive portion 722a, and the fourth adhesive portion 723b may overlap with the second adhesive portion 722b. According to an embodiment, the third adhesive portion 723a and the fourth adhesive portion 723b may be spaced apart from each other, and the second region 1000A2 is located between the third adhesive portion 723a and the fourth adhesive portion 723b.

[0143] A heat dissipation layer 721 may be disposed between a first heat dissipation adhesive layer 722 and a second heat dissipation adhesive layer 723. The heat dissipation layer 721 includes a first heat dissipation portion 721a disposed between a first adhesive portion 722a and a third adhesive portion 723a, and a second heat dissipation portion 721b disposed between a second adhesive portion 722b and a fourth adhesive portion 723b. According to an embodiment, the first heat dissipation portion 721a and the second heat dissipation portion 721b may be spaced apart from each other, and a second region 1000A2 is located between the first heat dissipation portion 721a and the second heat dissipation portion 721b.

[0144] According to the present invention, the heat dissipation layer 721 may be a graphitized polymer film. The polymer film may be, for example, a polyimide film. However, the material of the heat dissipation layer 721 is not limited to this and may include other materials. For example, the heat dissipation layer 721 may include graphite, aluminum (Al), nickel (Ni), platinum (Pt), silver (Ag), gold (Au), or combinations thereof.

[0145] The first heat dissipation portion 721a may define at least one first opening OP1, and the second heat dissipation portion 721b may define at least one second opening OP2. The first adhesive portion 722a and the third adhesive portion 723a may be attached to each other through the first opening OP1, and the second adhesive portion 722b and the fourth adhesive portion 723b may be attached to each other through the second opening OP2. This will be referred to later. Figure 9 and Figure 10 To describe in more detail.

[0146] An auxiliary adhesive layer 724 may be disposed between the first heat-dissipating adhesive layer 722 and the second heat-dissipating adhesive layer 723. The auxiliary adhesive layer 724 includes a first auxiliary adhesive portion 724a overlapping the first region 1000A1 and a second auxiliary adhesive portion 724b overlapping the third region 1000A3. According to an embodiment, the first auxiliary adhesive portion 724a and the second auxiliary adhesive portion 724b may be spaced apart from each other, and the second region 1000A2 is located between the first auxiliary adhesive portion 724a and the second auxiliary adhesive portion 724b.

[0147] A first auxiliary adhesive portion 724a may be disposed between a first adhesive portion 722a and a third adhesive portion 723a to surround a first heat dissipation portion 721a on a plane. A second auxiliary adhesive portion 724b may be disposed between a second adhesive portion 722b and a fourth adhesive portion 723b to surround a second heat dissipation portion 721b on a plane.

[0148] For example, each of the first auxiliary adhesive portion 724a and the second auxiliary adhesive portion 724b can be double-sided adhesive tape. The top surface of the first auxiliary adhesive portion 724a can be attached to the first adhesive portion 722a, and the bottom surface of the first auxiliary adhesive portion 724a can be attached to the third adhesive portion 723a. The top surface of the second auxiliary adhesive portion 724b can be attached to the second adhesive portion 722b, and the bottom surface of the second auxiliary adhesive portion 724b can be attached to the fourth adhesive portion 723b.

[0149] In other words, the first heat-dissipating adhesive layer 722 and the second heat-dissipating adhesive layer 723 can have a structure in which the first heat-dissipating adhesive layer 722 and the second heat-dissipating adhesive layer 723 are attached to each other through the auxiliary adhesive layer 724. Specifically, since the first heat-dissipating adhesive layer 722 and the second heat-dissipating adhesive layer 723 are attached to each other through the auxiliary adhesive layer 724, the adhesive force between the first heat-dissipating adhesive layer 722 and the second heat-dissipating adhesive layer 723 can be greatly improved. As a result, peeling between the first heat-dissipating adhesive layer 722 and the second heat-dissipating adhesive layer 723 can be prevented.

[0150] According to an embodiment of the present invention, the first heat dissipation portion 721a may be sealed by a first adhesive portion 722a, a third adhesive portion 723a, and a first auxiliary adhesive portion 724a. The second heat dissipation portion 721b may be sealed by a second adhesive portion 722b, a fourth adhesive portion 723b, and a second auxiliary adhesive portion 724b.

[0151] Furthermore, each of the first heat-dissipating adhesive layer 722 and the second heat-dissipating adhesive layer 723 may have a thickness of approximately 5 micrometers, and each of the heat-dissipating layer 721 and the auxiliary adhesive layer 724 may have a thickness of approximately 17 micrometers. According to the present invention, the heat-dissipating layer 721 may have a thickness greater than the sum of the thicknesses of the first heat-dissipating adhesive layer 722 and the second heat-dissipating adhesive layer 723. However, the thickness of each of the first heat-dissipating adhesive layer 722, the second heat-dissipating adhesive layer 723, the heat-dissipating layer 721, and the auxiliary adhesive layer 724 is not limited to the values ​​described above.

[0152] As described above, the heat dissipation layer 721 can be attached to the bottom surface of the lower plate 710 via the first heat dissipation adhesive layer 722, and can be attached to the top surface of the insulating film 730 via the second heat dissipation adhesive layer 723.

[0153] The insulating film 730 can be attached to the lower portion of the heat sink 720. For example, the insulating film 730 can be attached to the second heat-dissipating adhesive layer 723. The insulating film 730 includes a first insulating film 731 overlapping with a third adhesive portion 723a and a second insulating film 732 overlapping with a fourth adhesive portion 723b. The insulating film 730 can prevent the display device 1000 from emitting sound. According to an embodiment, the first insulating film 731 and the second insulating film 732 can be spaced apart from each other, and the second region 1000A2 is located between the first insulating film 731 and the second insulating film 732. Furthermore, the insulating film 730 can have a thickness of about 15 micrometers, but is not limited thereto.

[0154] The step compensation member 800 can be attached to the lower portion of the plate 610. For example, the lower adhesive layer 620 can be attached to the lower portion of one part of the plate 610, and the step compensation member 800 can be attached to the lower portion of another part of the plate 610.

[0155] The step compensation component 800 may include a first compensation adhesive layer 810, a step compensation film 820, and a second compensation adhesive layer 830. The first compensation adhesive layer 810 may be attached to the bottom surface of the plate 610. The step compensation film 820 may be a synthetic resin film. The second compensation adhesive layer 830 may be attached to the bottom surface of the step compensation film 820 and an assembly (not shown).

[0156] Despite Figure 4 The shape of the component included in the second lower member is shown as an example, but various modifications can be made to the shape of the component included in the second lower member.

[0157] Figure 5 This is a plan view showing a second lower component 700 according to an embodiment of the present invention. Figure 6A It is along the embodiments of the present invention. Figure 5 A sectional view taken by line I-I'. Figure 6B This is along another embodiment of the concept of the present invention. Figure 5 A sectional view taken by line I-I'.

[0158] exist Figure 5 The text shows that in Figure 4 The structure of the heat dissipation layer 721 in the configuration of the heat sink 720 shown is bonded to the auxiliary adhesive layer 724.

[0159] Reference Figure 5A first auxiliary adhesive portion 724a may surround a first heat dissipation portion 721a in a plane, and a second auxiliary adhesive portion 724b may surround a second heat dissipation portion 721b in a plane. The first auxiliary adhesive portion 724a may have a shape spaced apart from the second auxiliary adhesive portion 724b, and a second region 1000A2 is located between the first auxiliary adhesive portion 724a and the second auxiliary adhesive portion 724b. According to an embodiment, the first auxiliary adhesive portion 724a and the second auxiliary adhesive portion 724b are shown as having a non-overlapping structure in the second region 1000A2, but are not limited thereto. At least a portion of each of the first auxiliary adhesive portion 724a and the second auxiliary adhesive portion 724b may have a structure overlapping with the second region 1000A2, as will be referred to later. Figure 12 Describe it.

[0160] To facilitate and maintain the connection between the layers of the heat sink 720, the layers constituting the heat sink 720 can be formed to be connected to each other and have some matching shape appearance. For example, the second adhesive portion 722b, the fourth adhesive portion 723b, and the second auxiliary adhesive portion 724b can each have three substantially straight rectangular sides and a fourth side with a T1-shaped tab protruding from it. The second heat dissipation portion 721b can have a tab connected to the second auxiliary adhesive portion 724b to form Figure 5 The notch I1 of the composite layer is shown.

[0161] The second adhesive portion 722b, the fourth adhesive portion 723b, and the second auxiliary adhesive portion 724b all have substantially the same shape in order to stack the layers with minimal interference.

[0162] Similarly, the first adhesive portion 722a, the third adhesive portion 723a, and the first auxiliary adhesive portion 724a all have relatively identical shapes, with tabs protruding into the periphery of the interior. The tabs of the first auxiliary adhesive portion 724a are configured to connect with the notch of the first heat dissipation portion 721a. Unlike the "b" side of the heat sink 720, the structure on the "a" side may have additional ridges and a wavy shape to facilitate bonding between layers. The layers on the "a" side may have a larger overall size and additional connecting ridges and edges.

[0163] Reference Figure 6A The first heat dissipation portion 721a and the first auxiliary adhesive portion 724a are disposed between the first adhesive portion 722a and the third adhesive portion 723a. The first auxiliary adhesive portion 724a may not overlap with the first heat dissipation portion 721a on the third direction DR3, and may surround the first heat dissipation portion 721a on the plane along the first direction DR1.

[0164] The second heat dissipation portion 721b and the second auxiliary adhesive portion 724b are disposed between the second adhesive portion 722b and the fourth adhesive portion 723b. The second auxiliary adhesive portion 724b may not overlap with the second heat dissipation portion 721b on the third direction DR3, and may surround the second heat dissipation portion 721b on the plane along the first direction DR1.

[0165] For example, the first auxiliary adhesive portion 724a may have a structure that overlaps with the edge of the first adhesive portion 722a or the third adhesive portion 723a on the third direction DR3, and the second auxiliary adhesive portion 724b may have a structure that overlaps with the edge of the second adhesive portion 722b or the fourth adhesive portion 723b on the third direction DR3.

[0166] According to an embodiment of the present invention, the auxiliary adhesive layer 724 may have a structure spaced apart from the heat dissipation layer 721. For example, the first heat dissipation portion 721a may be spaced apart from the first auxiliary adhesive portion 724a by a predetermined distance SD, and the second heat dissipation portion 721b may be spaced apart from the second auxiliary adhesive portion 724b by a predetermined distance SD. As a result, internal spaces may be defined between the first heat dissipation portion 721a and the first auxiliary adhesive portion 724a, and between the second heat dissipation portion 721b and the second auxiliary adhesive portion 724b.

[0167] Reference Figure 6B The second lower member 700 may have a structure in which the auxiliary adhesive layer 724 is at least partially in contact with the heat dissipation layer 721. For example, the first heat dissipation portion 721a may have a structure in which the first auxiliary adhesive portion 724a is at least partially in contact, and the second heat dissipation portion 721b may have a structure in which the second auxiliary adhesive portion 724b is at least partially in contact.

[0168] Figure 7 This illustrates an embodiment based on the concept of the present invention. Figure 5 A cross-sectional view of the first auxiliary adhesive portion 724a, the first adhesive portion 722a, and the third adhesive portion 723a.

[0169] Each of the first auxiliary adhesive portion 724a and the second auxiliary adhesive portion 724b, as conceived in this invention, may include multiple layers. In the following, in Figure 7 The layered structure of the first auxiliary adhesive portion 724a is described exemplarily, but the structure of the second auxiliary adhesive portion 724b may also have a structure that is substantially the same as that of the first auxiliary adhesive portion 724a.

[0170] Reference Figure 7The first auxiliary adhesive portion 724a includes a base layer MS, a first adhesive layer CSa, and a second adhesive layer CSb. The first adhesive layer CSa can be disposed on the top surface of the base layer MS attached to the first adhesive portion 722a, and the second adhesive layer CSb can be disposed on the bottom surface of the base layer MS attached to the third adhesive portion 723a.

[0171] Figure 4 Each of the first heat-dissipating adhesive layer 722 and the second heat-dissipating adhesive layer 723 described herein can be configured as a single adhesive layer. For example, each of the first heat-dissipating adhesive layer 722 and the second heat-dissipating adhesive layer 723 may correspond to one of the first adhesive layer CSa and the second adhesive layer CSb included in the first auxiliary adhesive portion 724a.

[0172] Figure 8 It is along the embodiments of the present invention. Figure 5 The sectional view taken from line II-II'.

[0173] According to the concept of the present invention, Figure 5 The first auxiliary adhesive portion 724a shown may define at least one sensor opening SOP1 and SOP2. In this specification, sensor openings SOP1 and SOP2 are exemplarily described as including a first sensor opening SOP1 and a second sensor opening SOP2.

[0174] The first sensor opening SOP1 and the second sensor opening SOP2 can respectively correspond to Figure 1A The second sensing region 100SA2 and the third sensing region 100SA3 are shown among the multiple sensing regions 100SA1, 100SA2 and 100SA3. Although not shown, reference is made to... Figure 8 In the first sensing area 100SA1, each of the first sensor opening SOP1 and the second sensor opening SOP2 can overlap with the first auxiliary adhesive portion 724a and has an opening shape that passes through the buffer member 500, the first lower member 600, and the second lower member 700. The buffer member 500 and the first lower member 600 can be referred to as cover members.

[0175] In this case, each of the first sensor opening SOP1 and the second sensor opening SOP2 may not overlap with the heat dissipation layer 721.

[0176] Although not shown, the first sensor may be disposed below the second lower member 700 and overlap with the first sensor opening SOP1, and the second sensor may be disposed below the second lower member 700 and overlap with the second sensor opening SOP2. For example, the first sensor may be an illuminance sensor, and the second sensor may be a proximity sensor.

[0177] Figure 9 It is along the embodiments of the present invention. Figure 5 The sectional view taken from line III-III'. Figure 10 yes Figure 9 A magnified view of area AA.

[0178] First, such as Figure 5 As shown, the first heat dissipation portion 721a includes a plurality of first openings OP1 spaced apart from each other, and the second heat dissipation portion 721b includes a plurality of second openings OP2 spaced apart from each other.

[0179] Reference Figure 9 The first adhesive portion 722a and the third adhesive portion 723a can be attached to each other through the first opening OP1. The second adhesive portion 722b and the fourth adhesive portion 723b can be attached to each other through the second opening OP2.

[0180] Since the first adhesive portion 722a and the third adhesive portion 723a are in direct contact with each other through the first opening OP1, movement of the first heat dissipation portion 721a disposed between the first adhesive portion 722a and the third adhesive portion 723a can be prevented. Similarly, since the second adhesive portion 722b and the fourth adhesive portion 723b are in direct contact with each other through the second opening OP2, movement of the second heat dissipation portion 721b disposed between the second adhesive portion 722b and the fourth adhesive portion 723b can be prevented.

[0181] In particular, such as Figure 10 As shown, the first adhesive portion 722a overlapping the first opening OP1 may have a recessed first shape PT1, and the third adhesive portion 723a overlapping the first opening OP1 may have a recessed second shape PT2. The recessed first shape PT1 and the recessed second shape PT2 can be formed by pressing the first adhesive portion 722a and the third adhesive portion 723a into the first opening OP1. Although not shown, the second adhesive portion 722b and the fourth adhesive portion 723b overlapping the second opening OP2 may also have recessed shapes.

[0182] Figure 11 This is a cross-sectional view showing the second lower member 700 during a folding operation, according to an embodiment of the present invention.

[0183] Reference Figure 11 It shows that according to Figure 1A The display device 1000 shown has a folded first lower member 600 and a second lower member 700.

[0184] The first lower member 600 may have a structure that overlaps with each of the first region 1000A1, the second region 1000A2, and the third region 1000A3. The second lower member 700 may have a structure that overlaps with the first region 1000A1 and the third region 1000A3, and may have a structure that does not overlap with the second region 1000A2.

[0185] In other words, in the folded structure of the display device 1000, the second lower component 700 may have a structure that overlaps only with the first region 1000A1 and the third region 1000A3.

[0186] Figure 12 This is a plan view showing a second lower component 700-1 according to another embodiment of the concept of the present invention. Figure 13A This is another embodiment of the concept of the present invention. Figure 12 A sectional view taken from line IV-IV'. Figure 13B This is a cross-sectional view showing an adhesive sheet according to another embodiment of the concept of the present invention.

[0187] Besides Figure 5 The second lower component 700 shown is different from the second region 1000A2 in terms of its range. Figure 12 The second lower component 700-1 shown can have the same Figure 5 The second lower component 700 shown has a basically the same structure.

[0188] Reference Figure 12 At least a portion of the adjacent folding axis FX of the second lower member 700-1 may overlap with the second zone 1000A2. For details, see reference... Figure 4 As described, each of the lower plate 710, heat sink 720, and insulating film 730 can be divided into a first part and a second part, and the folding shaft FX is located between the first part and the second part.

[0189] Figure 5 Each of the lower plate 710, heat sink 720, and insulating film 730 of the second lower member 700 shown may have a structure that does not overlap with the second region 1000A2. On the other hand, Figure 12 At least a portion of each of the lower plate 710, heat sink 720 and insulating film 730 of the second lower component 700-1 shown may overlap with the second region 1000A2.

[0190] refer to Figure 13AFor example, a portion of the first auxiliary adhesive portion 724a and a portion of the second auxiliary adhesive portion 724b, which face each other and have the folding shaft FX located therebetween, may overlap with the second region 1000A2. Furthermore, a portion of the first heat dissipation portion 721a and a portion of the second heat dissipation portion 721b, which face each other and have the folding shaft FX located therebetween, may also overlap with the second region 1000A2.

[0191] Reference Figure 13B As another example, a portion of the first auxiliary adhesive portion 724a and a portion of the second auxiliary adhesive portion 724b, which face each other and have the folding axis FX located therebetween, may overlap with the second region 1000A2. However, each of the first heat dissipation portion 721a and the second heat dissipation portion 721b may have a structure that does not overlap with the second region 1000A2.

[0192] According to embodiments of the present invention, a heat sink may include a first heat-dissipating adhesive layer, a second heat-dissipating adhesive layer, and a heat-dissipating layer and an auxiliary adhesive layer disposed between the first and second heat-dissipating adhesive layers. Specifically, the heat-dissipating layer may be sealed by the first heat-dissipating adhesive layer, the second heat-dissipating adhesive layer, and the auxiliary adhesive layer. Because the heat-dissipating layer is sealed by the first heat-dissipating adhesive layer, the second heat-dissipating adhesive layer, and the auxiliary adhesive layer, movement of the heat-dissipating layer can be prevented.

[0193] Furthermore, since the first and second heat-dissipating adhesive layers are attached to each other through an auxiliary adhesive layer, the adhesion between the first and second heat-dissipating adhesive layers can be further improved. As a result, peeling between the first and second heat-dissipating adhesive layers can be prevented.

[0194] As described above, embodiments are disclosed in the accompanying drawings and specification. Although specific terminology is used, it is not intended to limit the meaning or scope of the inventive concept described in the claims, but only to illustrate the inventive concept. Therefore, those skilled in the art will understand from the foregoing that various modifications and other equivalent embodiments are possible. Accordingly, the actual scope of protection of this invention will be determined by the technical scope of the appended claims.

Claims

1. A display device comprising: a display module in which a folding area folded with respect to a folding axis and first and second non-folding areas facing each other are defined, and the folding area is between the first and second non-folding areas; and a heat spreader disposed on one surface of the display module; wherein the heat spreader comprises: a first heat spreading adhesive layer including a first adhesive portion overlapping the first non-folding area and a second adhesive portion overlapping the second non-folding area; a second heat spreading adhesive layer including a third adhesive portion overlapping the first adhesive portion and a fourth adhesive portion overlapping the second adhesive portion; a heat spreading layer including a first heat spreading portion disposed between the first adhesive portion and the third adhesive portion and a second heat spreading portion disposed between the second adhesive portion and the fourth adhesive portion; and an auxiliary adhesive layer including a first auxiliary adhesive portion disposed between the first adhesive portion and the third adhesive portion to surround the first heat spreading portion in a plane and a second auxiliary adhesive portion disposed between the second adhesive portion and the fourth adhesive portion to surround the second heat spreading portion in the plane. 2.The display device of claim 1, wherein: the first heat spreading portion is sealed by the first adhesive portion, the third adhesive portion, and the first auxiliary adhesive portion; and the second heat spreading portion is sealed by the second adhesive portion, the fourth adhesive portion, and the second auxiliary adhesive portion. 3.The display device of claim 1, wherein: the first heat spreading portion and the first auxiliary adhesive portion are spaced apart from each other; and the second heat spreading portion and the second auxiliary adhesive portion are spaced apart from each other. each of the first and second auxiliary adhesive portions comprises:

4. The display device of claim 1, wherein, a base layer; a first adhesive layer disposed between the base layer and the first heat spreading adhesive layer; and a second adhesive layer disposed between the base layer and the second heat spreading adhesive layer. each of the first and second heat spreading adhesive layers comprises a single adhesive layer.

5. The display device of claim 4, wherein, at least one sensor opening is defined through the first adhesive portion, the third adhesive portion, and the first auxiliary adhesive portion.

6. The display device of claim 1, wherein, 7.The display device of claim 6, further comprising at least one cover member disposed between the heat spreader and the display module, the sensor opening passes through the at least one cover member. wherein, 8.The display device of claim 1, wherein: the first heat spreading portion includes a plurality of first openings spaced apart from each other, and the first adhesive portion and the third adhesive portion are attached to each other through the plurality of first openings; and the second heat spreading portion includes a plurality of second openings spaced apart from each other, and the second adhesive portion and the fourth adhesive portion are attached to each other through the plurality of second openings. 9.The display device of claim 8, wherein, ​ Each of the first adhesive portion and the third adhesive portion overlapping with the plurality of first openings has a recessed shape; and Each of the second adhesive portion and the fourth adhesive portion overlapping with the plurality of second openings has a recessed shape.

10. The display device of claim 8, wherein, In a thickness direction of the display module, a thickness of the heat dissipation layer is greater than a sum of a thickness of the first heat dissipation adhesive layer and a thickness of the second heat dissipation adhesive layer.

11. The display device of claim 1, wherein, The first adhesive portion and the second adhesive portion are spaced apart from each other, and the folding axis is located between the first adhesive portion and the second adhesive portion.

12. The display device of claim 11, wherein, The heat dissipation sheet does not overlap with the folding area.

13. The display device of claim 11, wherein, At least a portion of each of the first auxiliary adhesive portion and the second auxiliary adhesive portion overlaps with the folding area.

14. The display device of claim 13, wherein, At least a portion of each of the first heat dissipation portion and the second heat dissipation portion overlaps with the folding area.

15. The display device of claim 13, wherein, Each of the first heat dissipation portion and the second heat dissipation portion does not overlap with the folding area.

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