Display device

Abstract

The present invention provides a display device. The display device is characterized by comprising: a display module defining a first unfolding region, a second unfolding region, and a folding region disposed between the first unfolding region and the second unfolding region and folded about a folding axis; a window disposed on the display module; and an adhesive layer disposed between the display module and the window, comprising a first adhesive material and a second adhesive material having a higher elongation than the first adhesive material, wherein in each of the first unfolding region and the second unfolding region, the first adhesive material has a larger planar area than the second adhesive material, and in the folding region, the second adhesive material has a larger planar area than the first adhesive material.

Description

Technical Field

[0001] The present invention relates to a display device, and more particularly to a foldable display device. Background Art

[0002] Various display devices have been developed for use in multimedia devices such as televisions, mobile phones, tablet computers, navigation systems, and game consoles. Input devices for display devices include keyboards and mice. Recently, display devices have also incorporated input sensing layers as input devices.

[0003] Recently, various display devices, different from flat display devices, have been developed. For example, various flexible display devices such as curved display devices, bent display devices, foldable display devices, rollable display devices, and stretchable display devices have been developed. In particular, foldable display devices that can be folded around a folding axis have been developed. Summary of the Invention

[0004] An object of the present invention is to provide a display device including different kinds of adhesive members that are different from each other in a folding region.

[0005] A display device according to an embodiment for achieving the purpose of the present invention is characterized in that it includes: a display module, which defines a first non-folding area, a second non-folding area, and a folding area arranged between the first non-folding area and the second non-folding area and folded based on a folding axis; a window, which is arranged on the display module; and an adhesive layer, which is arranged between the display module and the window and includes a first adhesive material and a second adhesive material with a higher elongation than the first adhesive material, in each of the first non-folding area and the second non-folding area, the planar area of ​​the first adhesive material is larger than the planar area of ​​the second adhesive material, and in the folding area, the planar area of ​​the second adhesive material is larger than the planar area of ​​the first adhesive material.

[0006] According to an embodiment of the present invention, the first adhesive substance overlapping the folding area has a shape of multiple adhesive patterns arranged in a first direction and extending in a second direction perpendicular to the first direction, and each of the adhesive patterns includes multiple adhesive portions arranged at regular intervals along the second direction.

[0007] According to an embodiment of the present invention, in a plane, the second adhesive substance overlapping the folding area surrounds the adhesive pattern.

[0008] According to an embodiment of the present invention, the folding area includes a first area and a second area divided based on the folding axis, and the bonding pattern includes: a first bonding pattern overlapping the first area; and a second bonding pattern overlapping the second area, and the spacing between the first bonding parts included in the first bonding pattern in the bonding part along the first direction increases as it is adjacent to the folding axis, and the spacing between the second bonding parts included in the second bonding pattern in the bonding part along the first direction increases as it is adjacent to the folding axis.

[0009] According to an embodiment of the present invention, the first area is arranged between the first unfolding area and the second area, and the second area is arranged between the second unfolding area and the first area.

[0010] According to an embodiment of the present invention, the bonding pattern includes: a first bonding pattern; and a second bonding pattern, which is closer to the folding axis than the first bonding pattern, and on a plane, the bonding portions of the first bonding pattern each have a larger area than the bonding portions of the second bonding pattern.

[0011] According to an embodiment of the present invention, on the plane, the adhesive portions of the first adhesive pattern have the same area, and the adhesive portions of the second adhesive pattern have the same area.

[0012] According to an embodiment of the present invention, in the folding area, at least a portion of the first adhesive substance does not overlap with the second adhesive substance.

[0013] According to an embodiment of the present invention, the second adhesive substance entirely covers the adhesive pattern.

[0014] According to an embodiment of the present invention, the second adhesive material overlapping the first non-folding area has the shape of multiple first sub-adhesive patterns arranged in the first direction and extending in the second direction, and each of the first sub-adhesive patterns includes multiple first sub-adhesive portions arranged at a certain interval along the second direction.

[0015] According to an embodiment of the present invention, on a plane, the first adhesive substance overlapping the first unfolded area surrounds the first sub-adhesive pattern.

[0016] According to an embodiment of the present invention, in the first direction, the intervals between the first sub-adhesive portions overlapping the first unfolded area become shorter as they become closer to the folded area.

[0017] According to an embodiment of the present invention, the first sub-bonding pattern includes: a first pattern; and a second pattern, which is closer to the folding area than the first pattern, and on a plane, the first sub-bonding portions of the second pattern each have a larger area than the first sub-bonding portions of the first pattern.

[0018] According to an embodiment of the present invention, the second adhesive material overlapping the second non-folding area has the shape of a plurality of second sub-adhesive patterns arranged in the first direction and extending in the second direction, and each of the second sub-adhesive patterns includes a plurality of second sub-adhesive portions arranged at certain intervals along the second direction. On a plane, the first adhesive material overlapping the second non-folding area surrounds the second sub-adhesive pattern.

[0019] According to an embodiment of the present invention, the first non-folding area includes: a first sub-area; and a second sub-area, overlapping with the first sub-adhesive pattern and defined between the first sub-area and the folding area, and in a plane, the area of ​​the first sub-area is larger than the area of ​​the second sub-area.

[0020] According to another embodiment for achieving the purpose of the present invention, a display device includes: a display module, which defines a first non-folding area, a second non-folding area, and a folding area arranged between the first non-folding area and the second non-folding area and folded based on a folding axis; a window, which is arranged on the display module; and an adhesive layer, which is arranged between the display module and the window and includes a first adhesive material and a second adhesive material with a higher elongation than the first adhesive material, the first adhesive material overlapping the folding area has the shape of a plurality of adhesive patterns arranged in a first direction and extending in a second direction perpendicular to the first direction, and in the first direction, the interval between two adjacent adhesive patterns among the adhesive patterns increases the closer they are to the folding axis.

[0021] According to an embodiment of the present invention, the bonding patterns each include a plurality of bonding portions arranged at certain intervals along the second direction, and on a plane, the two bonding patterns are defined as a first bonding pattern and a second bonding pattern that is closer to the folding axis than the first bonding pattern, and the bonding portions of the first bonding pattern each have a larger area than the bonding portions of the second bonding pattern.

[0022] According to an embodiment of the present invention, the second adhesive material does not overlap with each of the first unfolded area and the second unfolded area.

[0023] According to another embodiment for achieving the purpose of the present invention, a display device includes: a display module, which defines a first non-folding area, a second non-folding area, and a folding area arranged between the first non-folding area and the second non-folding area and folded based on a folding axis; a window, which is arranged on the display module; and an adhesive layer, which is arranged between the display module and the window and includes a first adhesive substance and a second adhesive substance with a higher elongation than the first adhesive substance, the adhesive layer overlapping the folding area includes: a first adhesive layer, which corresponds to the first adhesive substance and is arranged on the display module; a second adhesive layer, which is arranged on the first adhesive layer and corresponds to the first adhesive substance; and a third adhesive layer, which is arranged between the first adhesive layer and the second adhesive layer and corresponds to the second adhesive substance.

[0024] According to an embodiment of the present invention, in the thickness direction of the display module, the thickness of the third adhesive layer is greater than the sum of the thickness of the first adhesive layer and the thickness of the second adhesive layer.

[0025] (Effects of the Invention)

[0026] According to an embodiment of the present invention, the adhesive layer for bonding the display module and the window includes a folding adhesive region and a first adhesive region and a second adhesive region disposed therebetween. In particular, the folding adhesive region can be formed of a first adhesive material of different types and a second adhesive material having a higher elongation than the first adhesive material.

[0027] In the folding adhesive region, the density of the second adhesive substance is greater than that of the first adhesive substance, and thus deformation of the adhesive layer can be prevented even in a folding action in the folding adhesive region. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a perspective view of a display device according to an embodiment of the present invention.

[0029] Figure 2a is a perspective view of a display device folded based on a folding axis according to an embodiment of the present invention.

[0030] Figure 2b is a perspective view of a display device folded based on a folding axis according to an embodiment of the present invention.

[0031] Figure 3 is a cross-sectional view of a folded display device according to an embodiment of the present invention.

[0032] Figure 4 is a cross-sectional view of a display module according to an embodiment of the present invention.

[0033] Figure 5a yes Figure 4 A top view of the display panel is shown.

[0034] Figure 5b yes Figure 5a The equivalent circuit diagram of the pixel is shown.

[0035] Figure 5c is an enlarged cross-sectional view of a display panel according to an embodiment of the present invention.

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

[0037] Figure 7a is a diagram showing an embodiment according to the present invention Figure 6 A top view of a first bonding area of ​​an adhesive layer is shown.

[0038] Figure 7b According to an embodiment of the present invention, Figure 7a The cross-sectional view is taken along line II'.

[0039] Figure 7c is a diagram showing an embodiment according to the present invention Figure 6 A top view of the second bonding area of ​​the bonding layer is shown.

[0040] Figure 8 is a diagram showing an embodiment according to the present invention Figure 6 A top view of the folded adhesive area of ​​the adhesive layer is shown.

[0041] Figure 9a According to an embodiment of the present invention, Figure 8 The cross-sectional view is shown along line II-II'.

[0042] Figure 9b According to another embodiment of the present invention, Figure 8 The cross-sectional view is shown along line II-II'.

[0043] Figure 10 is a top view of an adhesive layer according to another embodiment of the present invention.

[0044] Figure 11 is an exploded perspective view of a display device according to another embodiment of the present invention.

[0045] Figure 12 It is along Figure 11 The cross-sectional view is shown along line III-III'.

[0046] (Explanation of Reference Numerals)

[0047] WM: Window

[0048] DM: Display Module

[0049] AM: Adhesive layer

[0050] AM-N1: First bonding area

[0051] AM-N2: Second bonding area

[0052] AM-F: Folding bonding area

[0053] OC1: First adhesive material

[0054] OC2: Second adhesive material DETAILED DESCRIPTION

[0055] In this specification, when a certain component (or region, layer, part, etc.) is mentioned as being "on" another component, "connected" or "combined" to another component, it means that it can be directly configured / connected / combined on another component or a third component can be configured between them.

[0056] The same reference numerals denote the same components. In addition, in the drawings, the thickness, proportions, and sizes of the components are exaggerated for the purpose of effectively explaining the technical content.

[0057] “And / or” includes all combinations of more than one that can be defined by the associated structures.

[0058] Terms such as "first" and "second" can be used to describe various constituent elements, but these constituent elements are not limited by these terms. These terms are used solely to distinguish one constituent element from other constituent elements. For example, without departing from the scope of the present invention, the first constituent element can be named the second constituent element, and similarly, the second constituent element can be named the first constituent element. Unless the context clearly indicates otherwise, a singular expression includes a plural expression.

[0059] In addition, terms such as "below," "lower side," "above," and "upper side" are used to describe the relationship between the structures shown in the drawings. These terms are relative concepts and are described based on the directions shown in the drawings.

[0060] Unless otherwise defined, all terms (including technical and scientific terms) used in this specification have the same meanings as those commonly understood by those skilled in the art to which this invention belongs. Furthermore, terms that are the same as terms defined in commonly used dictionaries should be interpreted as having the same meanings as in the context of the relevant art and should not be interpreted as idealized or overly formal unless expressly defined herein.

[0061] Terms such as "including" or "having" should be understood as specifying the existence of features, numbers, steps, actions, constituent elements, parts or combinations thereof recorded in the specification, and do not preclude the existence or additional possibility of one or more other features or numbers, steps, actions, constituent elements, parts or combinations thereof.

[0062] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0063] Figure 1 is a perspective view of a display device according to an embodiment of the present invention. Figure 2a is a perspective view of a display device folded based on a folding axis according to an embodiment of the present invention. Figure 2b is a perspective view of a display device folded based on a folding axis according to an embodiment of the present invention.

[0064] According to the embodiments of the present invention, a foldable display device DD is exemplified, but the present invention is not limited thereto and can be applied to various display devices such as curved display devices, bendable display devices, rollable display devices, and stretchable display devices. Furthermore, the display device DD according to the present invention can be used in a variety of electronic devices, from large electronic devices such as televisions and outdoor billboards to small and medium-sized electronic devices such as mobile phones, personal computers, laptop computers, personal digital assistants, car navigation units, game consoles, portable electronic devices, watch-type electronic devices, and cameras.

[0065] Reference Figure 1 The display device DD includes a plurality of areas divided on the display surface. The display surface can be divided into: a display area DA, which actually displays an image IM; and a non-display area NDA, which does not display the image IM. The display area DA is an area where an image is displayed, and the non-display area NDA is an area adjacent to the display area DA where an image is not displayed. For example, Figure 1 The display device DD is shown as a quadrilateral smartphone, displaying weather information and an icon image IM. The non-display area NDA may be adjacent to the display area DA or surround the display area DA, and may be omitted according to other embodiments.

[0066] On the other hand, the display surface is parallel to the plane defined by the first direction DR1 and the second direction DR2. The normal direction of the display surface, that is, the thickness direction of the display device DD, indicates a third direction DR3. In this specification, the meaning of "when viewed on a plane or on a plane" can refer to the situation of observing in the third direction DR3. The front (or top) and back (or bottom) of each layer or unit described below are divided based on the third direction DR3. However, the directions indicated by the first direction DR1, the second direction DR2, and the third direction DR3 are relative concepts and can be transformed into other directions, such as the opposite direction.

[0067] According to an embodiment of the present invention, a display device DD may include a folding area FA folded along a folding axis FX, a first non-folding area NFA1, and a second non-folding area NFA2. The first non-folding area NFA1 and the second non-folding area NFA2 center the folding area FA and are spaced apart in a first direction DR1. The folding axis FX may be parallel to the second direction DR2.

[0068] The top surface DD-US of the display device DD may include: a first display surface overlapping the folding area FA; a second display surface overlapping the first unfolding area NFA1; and a third display surface overlapping the second unfolding area NFA2. The bottom surface DD-DS of the display device DD may be the surface opposite the top surface DD-US. The first through third display surfaces may display a single image, or each may display a different image.

[0069] Reference Figure 2a as well as Figure 2b The display device DD according to the present invention can be folded in two directions based on the folding axis FX.

[0070] Reference Figure 2a The folding area FA can be folded along the folding axis FX so that the second and third display surfaces face each other. In this case, the folding area FA can be folded along the first rotation axis RT1, exposing the lower surface DD-DS of the display device DD to the outside. The first rotation axis RT1 can be counterclockwise.

[0071] like Figure 2b As shown, the folding area FA can be folded along the folding axis FX so that the second and third display surfaces are exposed to the outside. In this case, the folding area FA can be folded along the second rotation axis RT2, and the upper surface DD-US of the display device DD is exposed to the outside. The second rotation axis RT2 can be in a clockwise direction.

[0072] As described above, the display device DD can be folded along the folding axis FX so that the second display surface of the first non-folding area NFA1 and the third display surface of the second non-folding area NFA2 face each other, which is defined as inner folding. Alternatively, the display device DD can be folded along the folding axis FX so that the second display surface of the first non-folding area NFA1 and the third display surface of the second non-folding area NFA2 face outward, which is defined as outer folding.

[0073] Figure 3 is a cross-sectional view of a folded display device according to an embodiment of the present invention.

[0074] Reference Figure 3A display device DD in an inwardly folded shape is disclosed. When the display device DD is folded inward, an inner space can be formed along the curvature radius FR of the display device DD. While the present invention describes forming an inner space when the display device DD is folded inward or outward, this is not limiting. In other words, the inner space may not be formed when the display device DD is folded inward or outward.

[0075] The display device DD includes a window WM, a display module DM, reinforcement members PU1 and PU2, and adhesive layers AM1 and AM2. According to the present invention, the display module DM and the window WM are each bendable and define a folding area FA, a first non-folding area NFA1, and a second non-folding area NFA2.

[0076] The window WM is disposed on the display module DM and includes a base layer WM-BS and a light shielding layer WM-BM. The base layer WM-BS includes a front surface and a back surface. The front surface of the base layer WM-BS corresponds to the top surface DD-US of the display device DD. The light shielding layer WM-BM can be disposed on the back surface of the base layer WM-BS facing the display module DM to define Figure 1 The non-display area NDA of the display device DD is shown.

[0077] For example, the base layer WM-BS may include a glass substrate, a sapphire substrate, plastic, a film, or the like. The light shielding layer WM-BM may be a colored organic layer, for example, formed by a coating. However, this is not limiting. If the entire surface of the display module DM is provided as a display surface for displaying images, the light shielding layer WM-BM may be omitted.

[0078] The display module DM is disposed between the window WM and the reinforcement components PU1 and PU2. The display module DM includes a display panel DP and an input sensing layer ISU (see Figure 4 The display panel DP may generate an image and transmit the generated image to the window WM. The input sensing layer ISU may sense external input.

[0079] The adhesive layers AM1 and AM2 include a first adhesive layer AM1 and a second adhesive layer AM2. The first adhesive layer AM1 is disposed between the display module DM and the window WM, and the second adhesive layer AM2 is disposed between the reinforcement components PU1 and PU2 and the display module DM. In particular, the adhesive layers AM1 and AM2 according to the present invention can be formed from an optically clear adhesive resin. For example, the first adhesive layer AM1 can be formed by applying a first adhesive substance included in a first external coating device, and the second adhesive layer AM2 can be formed by applying a second adhesive substance included in a second external coating device.

[0080] According to an embodiment of the present invention, the adhesive layers AM1 and AM2 overlapping the folding area FA may include different types of adhesive substances. For example, the adhesive layers AM1 and AM2 overlapping the folding area FA may include a first adhesive substance and a second adhesive substance having a higher elongation than the first adhesive substance.

[0081] In particular, in the folding area FA, the in-plane area of ​​the second adhesive material can be larger than the in-plane area of ​​the first adhesive material. In other words, in the folding area FA, the density of the second adhesive material can be greater than the overall density of the first adhesive material. Conversely, in each of the unfolding areas NFA1 and NFA2, the in-plane area of ​​the first adhesive material can be larger than the in-plane area of ​​the second adhesive material. In other words, in each of the unfolding areas NFA1 and NFA2, the density of the first adhesive material can be greater than the overall density of the second adhesive material.

[0082] As described above, the modulus of the adhesive layers AM1 and AM2 overlapping the folding area FA can be lower than the modulus of the adhesive layers AM1 and AM2 overlapping the unfolding areas NFA1 and NFA2. As a result, changes in the physical properties of the adhesive layers AM1 and AM2 overlapping the folding area FA can be prevented. For example, the adhesive layers AM1 and AM2 overlapping the folding area FA can be flexible enough to resist cracking caused by folding.

[0083] Furthermore, the adhesive layers AM1 and AM2 overlapping the non-folding areas NFA1 and NFA2 have a higher modulus than the adhesive layers AM1 and AM2 overlapping the folding area FA, and thus can have impact resistance against external impact.

[0084] On the other hand, according to the present invention, although the display device DD is described as including two adhesive layers AM1 and AM2, the present invention is not limited thereto. For example, the display device DD may include a plurality of adhesive layers having substantially the same structure.

[0085] The reinforcing components PU1 and PU2 include a first reinforcing component PU1 that overlaps the first unfolding area NFA1 and is disposed on the display module DM, and a second reinforcing component PU2 that overlaps the second unfolding area NFA2 and is disposed on the display module DM.

[0086] On the other hand, the reinforcing members PU1 and PU2 may not overlap the display module DM overlapping the folding area FA. This is because if the reinforcing members PU1 and PU2 are arranged on the display module DM overlapping the folding area FA, it is difficult to fold the display module DM.

[0087] Figure 4is a cross-sectional view of a display module according to an embodiment of the present invention. Figure 5a yes Figure 4 A top view of the display panel is shown. Figure 5b yes Figure 5a The equivalent circuit diagram of the pixel is shown. Figure 5c is an enlarged cross-sectional view of a display panel according to an embodiment of the present invention.

[0088] Reference Figure 4 The display module DM includes a display panel DP and an input sensing layer ISU. The display panel DP includes a base substrate SUB, a circuit element layer DP-CL disposed on the base substrate SUB, a display element layer DP-OLED, and an insulating layer TFL.

[0089] According to embodiments of the present invention, the display panel DP may be a light-emitting display panel, the type of which is not particularly limited. For example, the display panel DP may be an organic light-emitting display panel, a quantum dot light-emitting display panel, or a liquid crystal display panel. The light-emitting layer of an organic light-emitting display panel may include an organic light-emitting substance. The light-emitting layer of a quantum dot light-emitting display panel may include quantum dots, quantum rods, and the like.

[0090] Hereinafter, the display panel DP of the present invention is described as an organic light emitting display panel. However, the technical concept of the present invention is not limited thereto, and various display panels can be applied to the present invention according to embodiments.

[0091] The display panel DP includes a display area DP-DA and a non-display area DP-NDA. The display area DP-DA of the display panel DP corresponds to Figure 1 The display area DA shown in FIG, the non-display area DP-NDA corresponds to Figure 1 The non-display area NDA is shown.

[0092] The base substrate SUB may include at least one plastic film. As a flexible substrate, the base substrate SUB may include a plastic substrate, a glass substrate, a metal substrate, or an organic / inorganic composite material substrate.

[0093] The circuit element layer DP-CL includes at least one intermediate insulating layer and circuit elements. The intermediate insulating layer includes at least one intermediate inorganic film and at least one intermediate organic film. The circuit elements include signal lines, pixel driving circuits, etc.

[0094] The display element layer DP-OLED includes a plurality of organic light emitting diodes. The display element layer DP-OLED may also include an organic film such as a pixel definition film. According to other embodiments, when the display panel is provided as a liquid crystal display panel, the display element layer may be provided as a liquid crystal layer.

[0095] The insulating layer TFL seals the display element layer DP-OLED. For example, the insulating layer TFL may be a thin-film encapsulation layer, for example, including multiple insulating layers. The insulating layer TFL protects the display element layer DP-OLED from moisture, oxygen, and foreign matter such as dust particles. However, this is not limiting, and an encapsulation substrate may be provided in place of the insulating layer TFL. In this case, the encapsulation substrate may be positioned opposite the base substrate SUB, with the circuit element layer DP-CL and the display element layer DP-OLED disposed between the encapsulation substrate and the base substrate SUB.

[0096] The input sensing layer ISU may be disposed between the window WM and the display panel DP. The input sensing layer ISU senses externally applied input. Externally applied input may be provided in various forms. For example, external input includes various forms of external input, such as a part of the user's body, a stylus, light, heat, or pressure. Furthermore, with respect to pressure contact from a part of the user's body, such as a hand, of course, contact in a nearby or adjacent space (e.g., proximity) may also be a form of input.

[0097] The input sensing layer ISU can be directly disposed on the display panel DP. In this specification, "component A is directly disposed on component B" means that no adhesive layer is disposed between component A and component B. In this embodiment, the input sensing layer ISU can be manufactured using the display panel DP and a continuous process. However, the technical concept of the present invention is not limited to this. The input sensing layer ISU can be provided as a separate panel and bonded to the display panel DP via an adhesive layer. As another example, the input sensing layer ISU can be omitted.

[0098] Reference Figure 5a The display panel DP includes a scan drive circuit DCV, a plurality of signal lines SGL, a plurality of pixels PX, and a plurality of driving pads PD. The plurality of pixels PX overlap the display area DP-DA. The scan drive circuit DCV, the plurality of signal lines SGL, and the pixel drive circuit may be included in Figure 4 The circuit element layer DP-CL is shown.

[0099] The scan driving circuit DCV may overlap the non-display area DP-NDA and generate a plurality of scan signals. The plurality of scan signals may be sequentially output to a plurality of gate lines GL described below. The scan driving circuit DCV may also output another control signal to the driving circuit of the pixel PX.

[0100] The scan driving circuit DCV may include a plurality of thin film transistors formed by the same process as the driving circuit of the pixel PX, such as an LTPS (Low Temperature Polycrystaline Silicon) process or an LTPO (Low Temperature Polycrystalline Oxide) process.

[0101] The multiple signal lines SGL include gate lines GL, data lines DL, power lines PL, and control signal lines CSL. The gate lines GL are connected to corresponding pixels PX among the multiple pixels PX, and the data lines DL are connected to corresponding pixels PX among the multiple pixels PX. The power lines PL are connected to the multiple pixels PX. The control signal lines CSL can transmit control signals to the scan drive circuit DCV.

[0102] The display panel DP may include a plurality of driving pads PD electrically connected to the data lines DL, the power lines PL, and the control signal lines CSL. The driving pads PD may overlap the non-display area DP-NDA.

[0103] Reference Figure 5b The display area DP-DA may be defined as an area where pixels PX are arranged. Each pixel PX includes an organic light emitting diode OLED and a pixel driving circuit connected thereto.

[0104] In detail, the pixel PX may include a first transistor T1, a second transistor T2, a capacitor CP, and an organic light emitting diode OLED. The pixel driving circuit only needs to include a switching transistor and a driving transistor, but is not limited to Figure 5b On the other hand, according to Figure 5b As shown, the first transistor T1 and the second transistor T2 are shown as PMOS transistors, but are not limited thereto and may be provided as NMOS transistors.

[0105] The first transistor T1 is connected to the gate line GL and the data line DL. The organic light emitting diode OLED receives a first power voltage ELVDD and a second power voltage ELVSS from the power line PL. The first power voltage ELVDD is supplied to the first electrode of the organic light emitting diode OLED via the second transistor T2, and the second power voltage ELVSS is supplied to the second electrode of the organic light emitting diode OLED. The second power voltage ELVSS can be a voltage lower than the first power voltage ELVDD.

[0106] Reference Figure 5cThe display panel DP may include multiple insulating layers as well as semiconductor patterns, conductive patterns, signal lines, and the like. The insulating layers, semiconductor layers, and conductive layers are formed by coating, vapor deposition, and other methods. Subsequently, the insulating layers, semiconductor layers, and conductive layers may be selectively patterned by photolithography. In this manner, the semiconductor patterns, conductive patterns, signal lines, and the like included in the circuit element layer DP-CL and the display element layer DP-OLED are formed. Figure 5c The display panel DP shown is illustrated as Figure 5a The pixel driving circuit shown has additional components compared to the first transistor T1 and the second transistor T2. The base substrate SUB may be a base substrate supporting the circuit element layer DP-CL and the display element layer DP-OLED.

[0107] The base substrate SUB may include a synthetic resin layer. The synthetic resin layer may include a thermosetting resin. The base substrate SUB may have a multi-layer structure. For example, the base substrate SUB may also have a three-layer structure including 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 resin, methacrylic resin, polyisoprene resin, vinyl resin, epoxy resin, urethane resin, cellulose resin, silicone resin, polyamide resin, and perylene resin. In addition, the base substrate SUB may include a glass substrate, a metal substrate, or an organic / inorganic composite material substrate.

[0108] At least one inorganic layer is formed on the base substrate SUB. The inorganic layer may include at least one of aluminum oxide, titanium oxide, silicon oxide, silicon nitride, silicon oxynitride, zirconium oxide, and hafnium oxide. However, the types of inorganic layers are not limited thereto and various variations are possible. The inorganic layer may be formed into multiple layers. The multiple inorganic layers may constitute a barrier layer and / or a buffer layer. In this embodiment, the display panel DP is shown as including a buffer layer BFL.

[0109] The buffer layer BFL improves the bonding strength between the base substrate SUB and the semiconductor pattern. The buffer layer BFL may include a silicon oxide layer and a silicon nitride layer. The silicon oxide layer and the silicon nitride layer may be alternately stacked.

[0110] The semiconductor pattern is disposed on the buffer layer BFL. The semiconductor pattern may include polysilicon. However, the present invention is not limited thereto and may also include amorphous silicon or metal oxide.

[0111] Figure 5cOnly a portion of the semiconductor pattern is shown; other regions of the pixel PX may also be configured with semiconductor patterns on a plane. The semiconductor patterns may be arranged in a specific pattern across the pixel PX. The electrical properties of the semiconductor pattern vary depending on whether it is doped or not. The semiconductor pattern may include doped regions and undoped regions. The doped regions may be doped with either an N-type dopant or a P-type dopant. A P-type transistor includes a doped region doped with a P-type dopant.

[0112] Doped regions are more conductive than undoped regions and essentially function as electrodes or signal lines. Undoped regions are essentially equivalent to the active region (or channel) of a transistor. In other words, part of a semiconductor pattern can be the active region of a transistor, another part can be the source or drain of the transistor, and yet another part can be a connecting electrode or signal line.

[0113] like Figure 5c As shown, the source S1, active area A1, and drain D1 of the first transistor T1 are formed from a semiconductor pattern, and the source S2, active area A2, and drain D2 of the second transistor T2 are formed from a semiconductor pattern. The sources S1, S2 and drains D1, D2 extend from the active areas A1, A2 in opposite directions in a cross section. Figure 5c A portion of a connection signal line SCL formed from a semiconductor pattern is shown in . Although not separately shown, the connection signal line SCL may be connected to the drain D2 of the second transistor T2 on a plane.

[0114] A first insulating layer 10 is disposed on the buffer layer BFL. The first insulating layer 10 overlaps the plurality of pixels PX and covers the semiconductor pattern. The first insulating layer 10 may be an inorganic layer and / or an organic layer and may have a single-layer or multi-layer structure. The first insulating layer 10 may include at least one of aluminum oxide, titanium oxide, silicon oxide, silicon nitride, silicon oxynitride, zirconium oxide, and hafnium oxide. In this embodiment, the first insulating layer 10 may be a single-layer silicon oxide layer. Not only the first insulating layer 10, but also the insulating layer of the circuit element layer DP-CL described later may be an inorganic layer and / or an organic layer and may have a single-layer or multi-layer structure. The inorganic layer may include at least one of the above substances.

[0115] Gates G1 and G2 are disposed on the first insulating layer 10. The gates G1 and G2 may be part of a metal pattern. The gates G1 and G2 overlap the active areas A1 and A2. In the process of doping the semiconductor pattern, the gates G1 and G2 act as masks.

[0116] A second insulating layer 20 is disposed on the first insulating layer 10, covering the gates G1 and G2. The second insulating layer 20 overlaps the pixel PX. The second insulating layer 20 may be an inorganic layer and / or an organic layer, and may have a single-layer or multi-layer structure. In this embodiment, the second insulating layer 20 may be a single-layer silicon oxide layer.

[0117] An upper electrode UE may be disposed on the second insulating layer 20. The upper electrode UE may overlap with the gate G2 of the second transistor T2. The upper electrode UE may be a portion of the metal pattern. A portion of the gate G2 and the upper electrode UE overlapping therewith may define a capacitor CP (refer to Figure 5b ).

[0118] A third insulating layer 30 is disposed on the second insulating layer 20, covering the upper electrode UE. In this embodiment, the third insulating layer 30 may be a single silicon oxide layer. A first connection electrode CNE1 may be disposed on the third insulating layer 30. The first connection electrode CNE1 may be connected to the connection signal line SCL via a contact hole CNT-1 that penetrates the first insulating layer 10 through the third insulating layer 30.

[0119] A fourth insulating layer 40 is disposed on the third insulating layer 30, covering the first connection electrode CNE1. The fourth insulating layer 40 may be a single silicon oxide layer. A fifth insulating layer 50 is disposed on the fourth insulating layer 40. The fifth insulating layer 50 may be an organic layer. A second connection electrode CNE2 may be disposed on the fifth insulating layer 50. The second connection electrode CNE2 may be connected to the first connection electrode CNE1 via a contact hole CNT-2 that penetrates the fourth insulating layer 40 and the fifth insulating layer 50.

[0120] A sixth insulating layer 60 is disposed on the fifth insulating layer 50, covering the second connection electrode CNE2. The sixth insulating layer 60 may be an organic layer. A first electrode AE ​​is disposed on the sixth insulating layer 60. The first electrode AE ​​is connected to the second connection electrode CNE2 via a contact hole CNT-3 that penetrates the sixth insulating layer 60. An opening OP is defined in the pixel definition layer PDL. The opening OP of the pixel definition layer PDL exposes at least a portion of the first electrode AE.

[0121] like Figure 5c As shown, the display area DP-DA may include a light emitting area PXA and a light shielding area NPXA adjacent to the light emitting area PXA. The light shielding area NPXA may surround the light emitting area PXA. In this embodiment, the light emitting area PXA is defined to correspond to a portion of the first electrode AE ​​exposed by the opening OP.

[0122] The hole control layer HCL can be disposed in both the light-emitting area PXA and the light-shielding area NPXA. The hole control layer HCL can include a hole transport layer and a hole injection layer. The light-emitting layer EML is disposed on the hole control layer HCL. The light-emitting layer EML can be disposed in the area corresponding to the opening OP. In other words, the light-emitting layer EML can be formed separately for each pixel.

[0123] An electron control layer (ECL) is disposed on the light-emitting layer (EML). The electron control layer (ECL) may include an electron transport layer and an electron injection layer. The hole control layer (HCL) and the electron control layer (ECL) may be formed together in multiple pixels using an open mask. A second electrode (CE) is disposed on the electron control layer (ECL). The second electrode (CE) has a unitary shape and is commonly disposed in multiple pixels (PX).

[0124] The insulating layer TFL is disposed on the second electrode CE and may include a plurality of thin films.

[0125] Figure 6 is an exploded perspective view of a display device according to an embodiment of the present invention. Figure 7a is a diagram showing an embodiment according to the present invention Figure 6 A top view of a first bonding area of ​​an adhesive layer is shown. Figure 7b According to an embodiment of the present invention, Figure 7a The cross-sectional view is taken along line II'. Figure 7c is a diagram showing an embodiment according to the present invention Figure 6 A top view of the second bonding area of ​​the bonding layer is shown.

[0126] Figure 6 FIG1 shows an exploded perspective view of the display device DD in the unfolded state. Figure 6 The adhesive layer AM shown may correspond to Figure 3 The first adhesive layer AM1 of the adhesive layers AM1 and AM2 shown in FIG. The second adhesive layer AM2 may also have Figure 6 The structure of the adhesive layer AM is shown.

[0127] Although not shown, other components may be disposed between the first adhesive layer AM1 and the display module DM. For example, an optical control layer for controlling externally incident light may be included between the first adhesive layer AM1 and the display module DM. As one example, the optical control layer may be a polarizing layer for controlling the polarization of external light incident through the window WM. In this case, the first adhesive layer AM1 may be disposed between the window WM and the polarizing layer.

[0128] As another example, the optical control layer may be a color filter layer that controls external light incident through the window WM. The color filter layer can control external light by reflecting or absorbing external light incident through the window WM. In this case, the first adhesive layer AM1 may be disposed between the window WM and the color filter layer.

[0129] For details, refer to Figure 6The adhesive layer AM can be disposed between the window WM and the display module DM. The adhesive layer AM defines a folding adhesive area AM-F corresponding to the folding area FA, a first adhesive area AM-N1 corresponding to the first non-folding area NFA1, and a second adhesive area AM-N2 corresponding to the second non-folding area NFA2. Figure 3 The above-mentioned content, the adhesive layer AM may include Figures 7a to 7c The first adhesive material OC1 of different types and the second adhesive material OC2 having a higher elongation than the first adhesive material OC1 are described.

[0130] According to an embodiment of the present invention, in each of the first and second adhesive regions AM-N1 and AM-N2, the in-plane area of ​​the first adhesive material OC1 may be larger than the in-plane area of ​​the second adhesive material OC2. In the folding adhesive region AM-F, the in-plane area of ​​the second adhesive material OC2 may be larger than the in-plane area of ​​the first adhesive material OC1. In other words, in each of the first and second adhesive regions AM-N1 and AM-N2, the density of the first adhesive material OC1 may be greater than the density of the second adhesive material OC2. Conversely, in the folding adhesive region AM-F, the density of the second adhesive material OC2 may be greater than the density of the first adhesive material OC1.

[0131] For details, refer to Figure 7a The first adhesive region AM-N1 includes a first sub-region P1a and a second sub-region P1b. The second sub-region P1b is located between the first sub-region P1a and the folding adhesive region AM-F. On a plane, the first sub-region P1a may be larger than the second sub-region P1b.

[0132] According to the present invention, the first sub-region P1a of the first adhesive region AM-N1 may be entirely formed by the first adhesive material OC1. That is, the second adhesive material OC2 may not overlap with the first sub-region P1a.

[0133] The second adhesive material OC2 may be formed in the second sub-region P1b. According to the present invention, the second adhesive material OC2 formed in the second sub-region P1b may have the shape of first sub-adhesive patterns SP1a, SP2a, SP3a, SP4a, SP5a, and SP6a arranged in the first direction DR1 and extending in the second direction DR2. Each of the first sub-adhesive patterns SP1a-SP6a may include a plurality of first sub-adhesive portions arranged at regular intervals along the second direction DR2.

[0134] In this specification, the second adhesive substance OC2 is shown to have the shape of six first sub-adhesive patterns SP1a, SP2a, SP3a, SP4a, SP5a, and SP6a, but is not limited thereto. The second adhesive substance OC2 may have at least two first sub-adhesive pattern shapes.

[0135] The first adhesive material OC1 formed in the second sub-region P1b may surround the first sub-adhesive patterns SP1a to SP6a. That is, in the first adhesive region AM-N1, the first adhesive material OC1 may be formed in a connected integral shape without a certain pattern.

[0136] Specifically, the first external coating tool may apply the first adhesive substance OC1 to the remaining areas of the second sub-region P1b that do not correspond to the first sub-adhesive patterns SP1a-SP6a. In other words, the first external coating tool may not apply the first adhesive substance OC1 to the spaces where the first sub-adhesive patterns SP1a-SP6a are to be formed. Subsequently, the second external coating tool may apply the second adhesive substance OC2 to the second sub-region P1b along the shapes of the first sub-adhesive patterns SP1a-SP6a.

[0137] According to the present invention, in the second sub-region P1b, the planar area of ​​the first adhesive substance OC1 may be larger than the planar area of ​​the second adhesive substance OC2. In addition, in the second sub-region P1b, the density of the first adhesive substance OC1 may be greater than the density of the second adhesive substance OC2.

[0138] Hereinafter, for convenience of description, the first sub-bonding patterns SP1a to SP6a are described as first to sixth patterns, respectively. In the first direction DR1, the first pattern SP1a may be arranged farthest from the folding bonding area AM-F, and the sixth pattern SP6a may be arranged closest to the folding bonding area AM-F.

[0139] according to Figure 7a As shown, the first sub-bonding portions of the first to sixth patterns SP1a to SP6a have the same area on a plane. In contrast, two adjacent patterns among the first to sixth patterns SP1a to SP6a include first sub-bonding portions of different areas.

[0140] According to the present invention, the planar area of ​​the first sub-bonding portions included in the first to sixth patterns SP1a to SP6a can be increased as they become closer to the folded bonding area AM-F. For example, the planar area of ​​the first sub-bonding portion of the second pattern SP2a can be larger than the planar area of ​​the first sub-bonding portion of the first pattern SP1a. That is, among the first sub-bonding portions included in the first to sixth patterns SP1a, the planar area of ​​the first sub-bonding portion of the sixth pattern SP6a can be the largest, while the planar area of ​​the first sub-bonding portion of the first pattern SP1a can be the smallest.

[0141] In addition, according to the present invention, the intervals between the first sub-bonding portions included in the first to sixth patterns SP1a to SP6a along the first direction DR1 may become shorter as they become adjacent to the folding bonding region AM-F. Figure 7b In the first direction DR1, the interval between the first sub-bonding portion of the first pattern SP1a and the first sub-bonding portion of the second pattern SP2a may be a first length DS1. The interval between the first sub-bonding portion of the second pattern SP2a and the first sub-bonding portion of the third pattern SP3a may be a second length DS2. The interval between the first sub-bonding portion of the third pattern SP3a and the first sub-bonding portion of the fourth pattern SP4a may be a third length DS3. The interval between the first sub-bonding portion of the fourth pattern SP4a and the first sub-bonding portion of the fifth pattern SP5a may be a fourth length DS4. The interval between the first sub-bonding portion of the fifth pattern SP5a and the first sub-bonding portion of the sixth pattern SP6a may be a fifth length DS5.

[0142] According to the present invention, the first to fifth lengths DS1 to DS5 may be shortened as the distance from the folding adhesive region AM-F to the first direction DR1 increases. For example, the second length DS2, which is closer to the folding adhesive region AM-F, may be shorter than the first length DS1. The fifth length DS5, which is closer to the folding adhesive region AM-F, may be shorter than the fourth length DS4.

[0143] On the other hand, as the modulus and density of the first adhesive substance OC1 are greater than those of the second adhesive substance OC2 in the first adhesive area AM-N1, the first adhesive area AM-N1 may have greater impact resistance against external impact than the folding adhesive area AM-F.

[0144] Reference Figure 7c The second adhesive region AM-N2 includes a third sub-region P2a and a fourth sub-region P2b. The fourth sub-region P2b is located between the third sub-region P2a and the folding adhesive region AM-F. The fourth sub-region P2b may have a smaller area than the third sub-region P2a in a plane.

[0145] According to the present invention, the third sub-region P2a of the second adhesive region AM-N2 may be entirely formed by the first adhesive material OC1. That is, the second adhesive material OC2 may not overlap with the third sub-region P2a.

[0146] The second adhesive material OC2 may be formed in the fourth sub-region P2b. According to the present invention, the second adhesive material OC2 formed in the fourth sub-region P2b may have the shape of second sub-adhesive patterns SP1b, SP2b, SP3b, SP4b, SP5b, and SP6b arranged in the first direction DR1 and extending in the second direction DR2. Each of the second sub-adhesive patterns SP1b-SP6b may include a plurality of second sub-adhesive portions arranged at regular intervals along the second direction DR2.

[0147] The first adhesive material OC1 formed in the fourth sub-region P2b may surround the second sub-adhesive patterns SP1b to SP6b. In the second adhesive region AM-N2, the first adhesive material OC1 may be formed in a connected integral shape without a certain pattern.

[0148] Figure 7c The second sub-bonding patterns SP1b to SP6b shown may have Figure 7a The first sub-adhesive patterns SP1a to SP6a shown in FIG. 1 have substantially the same structure. That is, in the fourth sub-region P2b, the planar area of ​​the first adhesive material OC1 may be larger than the planar area of ​​the second adhesive material OC2. In addition, in the fourth sub-region P2b, the density of the first adhesive material OC1 may be greater than the density of the second adhesive material OC2. Figure 7c The structure of the second bonding area AM-N2 is omitted for ease of explanation.

[0149] Figure 8 is a diagram showing an embodiment according to the present invention Figure 6 A top view of the folded adhesive area of ​​the adhesive layer is shown. Figure 9a According to an embodiment of the present invention, Figure 8 The cross-sectional view is shown along line II-II'. Figure 9b According to another embodiment of the present invention, Figure 8 The cross-sectional view is shown along line II-II'.

[0150] Reference Figure 8 The folding and bonding area AM-F includes a first area FA1 and a second area FA2, which are divided by the folding axis FX. The first area FA1 is located between the second sub-area P1b of the first bonding area AM-N1 and the second area FA2. The second area FA2 is located between the fourth sub-area P2b of the second bonding area AM-N2 and the first area FA1.

[0151] According to the present invention, the first adhesive material OC1 formed in the folding adhesive region AM-F may have a plurality of adhesive patterns arranged in the first direction DR1 and extending in the second direction DR2. Each adhesive pattern includes a plurality of adhesive portions arranged at regular intervals along the second direction DR2.

[0152] On a plane, the second adhesive substance OC2 formed in the folding adhesive region AM-F may surround the adhesive pattern. In the folding adhesive region AM-F, the second adhesive substance OC2 may be formed in an integral shape connected to each other without having a certain pattern.

[0153] The adhesive pattern includes a plurality of first adhesive patterns AP1 formed in the first area FA1 and a plurality of second adhesive patterns AP2 formed in the second area FA2.

[0154] According to the present invention, the planar area of ​​the first bonding portion included in the first bonding pattern AP1 and the planar area of ​​the second bonding portion included in the second bonding pattern AP2 can decrease as the bonding pattern becomes closer to the folding axis FX. Alternatively, the first bonding portion of each first bonding pattern AP1 can have substantially the same planar area, and the second bonding portion of each second bonding pattern AP2 can have substantially the same planar area. Here, "substantially the same" means including process tolerances.

[0155] Therefore, in the folding adhesive region AM-F according to the present invention, the in-plane area of ​​the second adhesive material OC2 can be larger than the in-plane area of ​​the first adhesive material OC1. Furthermore, in the folding adhesive region AM-F, the density of the second adhesive material OC2 can be greater than the density of the first adhesive material OC1. Since the elongation of the second adhesive material OC2 is higher than that of the first adhesive material OC1, deformation of the adhesive layer AM can be prevented during the folding action of the folding adhesive region AM-F.

[0156] In addition, according to the present invention, the closer to the folding axis FX in the first direction DR1, the more the interval between the bonding portions of the two adjacent first bonding patterns AP1 included in the first bonding pattern AP1 can be increased. In the first direction DR1, the closer to the folding axis FX in the first direction DR1, the more the interval between the bonding portions of the two adjacent second bonding patterns AP2 included in the second bonding pattern AP2 can be increased. For details, refer to Figure 9a The three first bonding patterns AP1 adjacent to the folding axis FX in the first bonding patterns AP1 are described as first to third patterns. The first pattern is closer to the folding axis FX than the second pattern, and the second pattern is closer to the folding axis FX than the third pattern.

[0157] The interval between the bonding portion of the first pattern and the bonding portion of the second pattern is defined as a first length DS1a, and the interval between the bonding portion of the second pattern and the bonding portion of the third pattern is defined as a second length DS1b. According to the present invention, the first length DS1a closer to the folding axis FX can be longer than the second length DS1b.

[0158] The third second bonding pattern AP2 adjacent to the folding axis FX is described as the fourth to sixth patterns. The fourth pattern is closer to the folding axis FX than the fifth pattern, and the fifth pattern is closer to the folding axis FX than the sixth pattern.

[0159] The interval between the bonding portion of the fourth pattern and the bonding portion of the fifth pattern is defined as a first length DS2a, and the interval between the bonding portion of the fifth pattern and the bonding portion of the sixth pattern is defined as a second length DS2b. According to the present invention, the first length DS2a closer to the folding axis FX can be longer than the second length DS2b.

[0160] In addition, according to Figure 9a As shown, in the folding adhesive region AM-F, the first adhesive substance OC1 is shown as not overlapping with the second adhesive substance OC2 as a whole, but is not limited thereto. For example, depending on the process, at least a portion of the first adhesive substance OC1 may have a structure that overlaps with the second adhesive substance OC2.

[0161] Reference Figure 9b In the folding and bonding area AM-F, the second adhesive material OC2 can entirely cover the first adhesive material OC1. That is, after the first adhesive material OC1 is formed in the folding and bonding area AM-F using the first external coating tool, the second adhesive material OC2 can be formed entirely in the folding and bonding area AM-F using the second external coating tool. As a result, the window WM and the display module DM can be bonded to each other by the second adhesive material OC2 formed in the folding and bonding area AM-F.

[0162] Figure 10 is a top view of an adhesive layer according to another embodiment of the present invention.

[0163] Reference Figure 10 The adhesive layer AM-1 includes a folded adhesive area AM-F, a first adhesive area AM-N1, and a second adhesive area AM-N2. Figure 10 The folded adhesive region AM-F of the adhesive layer AM-1 shown may have Figure 8 The folded adhesive regions AM-F shown have substantially the same structure, and therefore, for ease of explanation, description thereof will be omitted.

[0164] According to another embodiment of the present invention, the first adhesive region AM-N1 and the second adhesive region AM-N2 may each be formed by the first adhesive material OC1. That is, the second adhesive material OC2 may not overlap the first adhesive region AM-N1 and the second adhesive region AM-N2.

[0165] Figure 11 is an exploded perspective view of a display device according to another embodiment of the present invention. Figure 12 It is along Figure 11 The cross-sectional view is shown along line III-III'.

[0166] and Figure 6 Compared with the display device DD shown, Figure 11 The display device DD-1 shown has only a modified structure of the adhesive layer AM-2, and the rest of the structure may be substantially the same.

[0167] For details, refer to Figure 11 as well as Figure 12 The adhesive layer AM-2 may include multiple adhesive layers. Specifically, the adhesive layer AM-2 includes: a first adhesive layer OC1a and a second adhesive layer OC1b, each corresponding to a first adhesive substance; and a third adhesive layer OC2a corresponding to a second adhesive substance having a higher elongation than the first adhesive substance.

[0168] The third adhesive layer OC2a is disposed between the first adhesive layer OC1a and the second adhesive layer OC1b. In particular, in the third direction DR3, the thickness of the third adhesive layer OC2a may be greater than the sum of the thicknesses of the first adhesive layer OC1a and the second adhesive layer OC1b.

[0169] In addition, according to Figure 11 As shown, the adhesive layer AM-2 disposed between the window WM and the display module DM is shown as comprising multiple adhesive layers, but is not limited thereto. For example, only the adhesive layer AM-2 overlapping the folding area FA may be composed of multiple adhesive layers, while the adhesive layer AM-2 overlapping the first non-folding area NFA1 and the second non-folding area NFA2 may be composed of a single adhesive layer comprising only the first adhesive material.

[0170] As described above, embodiments are disclosed in the drawings and the specification. Although specific terms are used herein, they are used solely for the purpose of illustrating the present invention and are not intended to define or restrict the scope of the present invention as described in the claims. Therefore, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible. Therefore, the true technical scope of the present invention should be determined by the technical concepts of the accompanying claims.

Claims

1. A display device, characterized in that: include: A display module defines a first non-folding area, a second non-folding area, and a folding area disposed between the first non-folding area and the second non-folding area and folded based on a folding axis; a window, configured on the display module; as well as An adhesive layer is disposed between the display module and the window and includes a first adhesive material and a second adhesive material having a higher elongation than the first adhesive material. In each of the first unfolded area and the second unfolded area, the planar area of ​​the first adhesive substance is larger than the planar area of ​​the second adhesive substance. In the folding region, the second adhesive substance has a larger surface area than the first adhesive substance.

2. The display device according to claim 1, wherein The first adhesive material overlapping the folding area has a shape of a plurality of adhesive patterns arranged in a first direction and extending in a second direction perpendicular to the first direction. Each of the bonding patterns includes a plurality of bonding portions arranged at regular intervals along the second direction.

3. The display device according to claim 2, wherein: On a plane, the second adhesive material overlapping the folding area surrounds the adhesive pattern.

4. The display device according to claim 2, wherein The folding area includes a first area and a second area divided based on the folding axis. The bonding pattern includes: a first bonding pattern overlapping the first region; and a second bonding pattern overlapping the second region. The spacing between the first bonding portions in the bonding portion included in the first bonding pattern along the first direction increases as it is adjacent to the folding axis, and the spacing between the second bonding portions in the bonding portion included in the second bonding pattern along the first direction increases as it is adjacent to the folding axis.

5. The display device according to claim 4, wherein The first region is arranged between the first unfolding region and the second region, and the second region is arranged between the second unfolding region and the first region. The display device according to claim 2 , wherein: The bonding pattern includes: a first bonding pattern; and a second bonding pattern that is more adjacent to the folding axis than the first bonding pattern, In a planar view, the bonding portions of the first bonding pattern each have a larger area than the bonding portions of the second bonding pattern.

7. The display device according to claim 6, wherein: On the plane, the bonding portions of the first bonding pattern have the same area, and the bonding portions of the second bonding pattern have the same area.

8. The display device according to claim 2, wherein: In the folding region, at least a portion of the first adhesive substance does not overlap with the second adhesive substance.

9. The display device according to claim 2, wherein: The second adhesive substance entirely covers the adhesive pattern.

10. The display device according to claim 2, wherein: The second adhesive material overlapping the first unfolded area has a shape of a plurality of first sub-adhesive patterns arranged in the first direction and extending in the second direction. Each of the first sub-bonding patterns includes a plurality of first sub-bonding portions arranged at intervals along the second direction.

11. The display device according to claim 10, wherein: On a plane, the first adhesive substance overlapping the first unfolded area surrounds the first sub-adhesive pattern.

12. The display device according to claim 10, wherein: In the first direction, the intervals between the first sub-adhesive portions overlapping the first unfolded region become shorter as they become adjacent to the folded region.

13. The display device according to claim 10, wherein: The first sub-bonding pattern includes: a first pattern; and a second pattern that is more adjacent to the folding area than the first pattern. On a plane, each of the first sub-bonding portions of the second pattern has a larger area than each of the first sub-bonding portions of the first pattern.

14. The display device according to claim 10, wherein: The second adhesive material overlapping the second unfolded area has a shape of a plurality of second sub-adhesive patterns arranged in the first direction and extending in the second direction. Each of the second sub-bonding patterns includes a plurality of second sub-bonding portions arranged at certain intervals along the second direction, On a plane, the first adhesive material overlapping the second unfolded area surrounds the second sub-adhesive pattern.

15. The display device according to claim 10, wherein The first non-folding area includes: a first sub-area; and a second sub-area overlapping the first sub-bonding pattern and defined between the first sub-area and the folding area. In a plane, the area of ​​the first sub-region is larger than the area of ​​the second sub-region.

16. A display device, characterized in that: include: A display module defines a first non-folding area, a second non-folding area, and a folding area disposed between the first non-folding area and the second non-folding area and folded based on a folding axis; a window, configured on the display module; as well as An adhesive layer is disposed between the display module and the window and includes a first adhesive material and a second adhesive material having a higher elongation than the first adhesive material. The first adhesive material overlapping the folding area has a shape of a plurality of adhesive patterns arranged in a first direction and extending in a second direction perpendicular to the first direction. In the first direction, the interval between two adjacent bonding patterns among the bonding patterns increases as the distance becomes closer to the folding axis.

17. The display device according to claim 16, wherein: Each of the bonding patterns includes a plurality of bonding portions arranged at regular intervals along the second direction, On a plane, the two bonding patterns are defined as a first bonding pattern and a second bonding pattern that is closer to the folding axis than the first bonding pattern, and bonding portions of the first bonding pattern each have a larger area than bonding portions of the second bonding pattern.

18. The display device according to claim 16, wherein: The second adhesive material does not overlap with each of the first unfolded area and the second unfolded area.

19. A display device, characterized in that: include: A display module defines a first non-folding area, a second non-folding area, and a folding area disposed between the first non-folding area and the second non-folding area and folded based on a folding axis; a window, configured on the display module; as well as An adhesive layer is disposed between the display module and the window and includes a first adhesive material and a second adhesive material having a higher elongation than the first adhesive material. The adhesive layer overlapping the folding area includes: a first adhesive layer corresponding to the first adhesive material and disposed on the display module; a second adhesive layer disposed on the first adhesive layer and corresponding to the first adhesive substance; and The third adhesive layer is disposed between the first adhesive layer and the second adhesive layer and corresponds to the second adhesive substance.

20. The display device according to claim 19, wherein In the thickness direction of the display module, the thickness of the third adhesive layer is greater than the sum of the thickness of the first adhesive layer and the thickness of the second adhesive layer.

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