Display device

Abstract

The present disclosure relates to a display device, and more particularly, to a display device capable of improving appearance quality and minimizing a light leakage phenomenon. According to an embodiment of the disclosure, a display device includes: a base substrate; a light emitting element disposed on the base substrate; a protective substrate disposed on the light emitting element; a polarizing plate disposed on the protective substrate; and a side wall disposed on an edge portion of an upper surface of the base substrate.

Description

[0001] This application claims priority to and the benefit of Korean Patent Application No. 10-2023-0120418 filed in the Korean Intellectual Property Office on September 11, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0002] Embodiments relate to a display device, and more particularly, to a display device capable of improving appearance quality and minimizing a light leakage phenomenon, and a method for manufacturing the display device. Background Art

[0003] Various types of electronic devices including display modules are used to provide image information, and the electronic device may include an electronic module that receives an external signal or provides an output signal to the outside. For example, the electronic module may include a camera module, etc., and the demand for display devices that obtain high-quality captured images is increasing. Summary of the invention

[0004] The embodiment provides a display device capable of improving appearance quality and minimizing a light leakage phenomenon and a method for manufacturing the display device.

[0005] However, the embodiments are not limited to those set forth herein. The above and other embodiments will become more apparent to those of ordinary skill in the art to which the disclosure pertains by referring to the detailed description of the disclosure given below.

[0006] According to the disclosed embodiment, the display device may include: a base substrate; a light emitting element disposed on the base substrate; a protective substrate disposed on the light emitting element; a polarizing plate disposed on the protective substrate; and a side wall disposed on an edge portion of an upper surface of the base substrate.

[0007] In an embodiment, the sidewall may extend along an edge portion of the upper surface of the base substrate.

[0008] In an embodiment, a side wall may be further provided on a side surface of the protection substrate and a side surface of the polarizing plate.

[0009] In an embodiment, the side wall may extend along a side surface of the protection substrate and a side surface of the polarizing plate.

[0010] In an embodiment, the sidewalls may surround the protective substrate and the polarizing plate.

[0011] In an embodiment, the protection substrate may have a size smaller than that of the base substrate.

[0012] In an embodiment, in a plan view, an edge portion of the protection substrate may be surrounded by an edge portion of the base substrate.

[0013] In an embodiment, the base substrate may have a size larger than that of the polarizing plate.

[0014] In an embodiment, an edge portion of the base substrate may surround an edge portion of the polarizing plate in a plan view.

[0015] In an embodiment, the display device may further include an encapsulation layer disposed on the light emitting element.

[0016] In an embodiment, the display device may further include an adhesive layer disposed between the encapsulation layer and the protection substrate.

[0017] In an embodiment, a side wall may be further provided on a side surface of the adhesive layer.

[0018] In an embodiment, the sidewall may extend along a side surface of the adhesive layer.

[0019] In an embodiment, the sidewalls may surround the adhesive layer.

[0020] In an embodiment, the display device may further include a touch sensing unit disposed between the encapsulation layer and the adhesive layer.

[0021] In an embodiment, the display device may further include a passivation layer disposed on a lower surface of the base substrate.

[0022] In an embodiment, the sidewall may include: a first sidewall portion disposed on an edge portion of the upper surface of the base substrate to cover the side surface of the protective substrate; and a second sidewall portion disposed on an edge portion of the first sidewall portion to cover the side surface of the polarizing plate.

[0023] In an embodiment, an outer surface of the first sidewall portion may have a linear shape, and an outer surface of the second sidewall portion may have a circular shape.

[0024] In an embodiment, an outer surface of the first sidewall portion and a side surface of the base substrate may be coplanar with each other.

[0025] In an embodiment, the first side wall portion and the second side wall portion may be integral with each other.

[0026] In an embodiment, the sidewall may include an inorganic black pigment or an organic black pigment.

[0027] According to a disclosed embodiment, a method for manufacturing a display device may include: preparing a structure including a base substrate, a light-emitting element disposed on the base substrate, and a protective substrate disposed on the light-emitting element; placing a polarizing plate on the protective substrate; and placing a side wall, the side wall being disposed on an edge portion of an upper surface of the base substrate.

[0028] In an embodiment, placing the sidewall may include: forming a sidewall material, the sidewall material being disposed on an edge portion of an upper surface of the base substrate; and solidifying the sidewall material.

[0029] In an embodiment, the sidewall may extend along an edge portion of the upper surface of the base substrate.

[0030] In an embodiment, the display device may further include a side wall disposed on a side surface of the protection substrate and a side surface of the polarizing plate.

[0031] In an embodiment, the side wall may extend along a side surface of the protection substrate and a side surface of the polarizing plate.

[0032] In an embodiment, the sidewalls may surround the protective substrate and the polarizing plate.

[0033] According to the embodiment, an invalid area of ​​a display device can be minimized.

[0034] For example, the appearance quality of the display device can be improved.

[0035] For example, light leakage of a display device can be minimized.

[0036] For example, moisture can be prevented from penetrating into the display device.

[0037] The disclosed effects are not limited to the above-described effects, and other effects not described here will become apparent to those skilled in the art from the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The above and other aspects and features of the disclosure will become more apparent by describing in detail embodiments of the disclosure with reference to the accompanying drawings, in which: Figure 1 is a schematic plan view of a display device according to an embodiment; Figure 2 It is along Figure 1 A schematic cross-sectional view taken along line II' of FIG. Figure 3 and Figure 4 is a diagram for describing a method of manufacturing a display device according to an embodiment; and Figure 5 is a schematic cross-sectional view of a display device according to an embodiment. DETAILED DESCRIPTION

[0039] In the following description, for the purpose of explanation, many specific details are set forth to provide a comprehensive understanding of various embodiments or implementations of the invention. As used herein, "embodiment" and "implementation" are interchangeable words, which are non-limiting examples of the device or method disclosed herein. However, it is apparent that various embodiments may be practiced without these specific details or in the case of one or more equivalent arrangements. Here, various embodiments need not be exclusive, nor need they be limited to disclosure. For example, the specific shape, configuration, and characteristics of an embodiment may be used or implemented in another embodiment.

[0040] Unless otherwise specified, the embodiments shown will be understood to provide features of the invention. Therefore, unless otherwise specified, the features, components, modules, layers, films, panels, regions and / or aspects, etc. (hereinafter individually or collectively referred to as "elements") of the various embodiments may be further combined, separated, interchanged and / or rearranged without departing from the scope of the invention.

[0041] The use of cross hatching and / or shadows in the accompanying drawings is generally provided to make the boundaries between adjacent elements clear. Therefore, unless otherwise specified, the presence and absence of cross hatching or shadows do not convey or indicate any preference or requirement for the specific material, material properties, size, ratio, commonality between the shown elements and / or any other characteristics, attributes, properties, etc. of the element. In addition, in the accompanying drawings, the size and relative size of the elements can be exaggerated for clarity and / or descriptive purposes. When the embodiment can be implemented differently, the specific process sequence can be performed in a different order than described. For example, two processes described in succession can be performed substantially simultaneously or in an order opposite to the described order. In addition, the same reference numerals indicate the same elements.

[0042] When an element or layer is referred to as being "on" another element or layer, "connected to" or "bonded to" another element or layer, the element or layer may be directly on, directly connected to or directly bonded to the other element or layer, or there may be an intervening element or layer. However, when an element or layer is referred to as being "directly on" another element or layer, "directly connected to" or "directly bonded to" another element or layer, there is no intervening element or layer. For this purpose, the term "connection" may refer to a physical connection, an electrical connection and / or a fluid connection with or without an intervening element. In addition, the axis of the first direction DR1, the axis of the second direction DR2 and the axis of the third direction DR3 are not limited to the three axes of a rectangular coordinate system such as the X-axis, the Y-axis and the Z-axis, and may be interpreted in a broader sense. For example, the axis of the first direction DR1, the axis of the second direction DR2 and the axis of the third direction DR3 may be perpendicular to each other, or may represent different directions that are not perpendicular to each other. For the purpose of this disclosure, "at least one of A and B" may be understood to mean only A, only B or any combination of A and B. Furthermore, “at least one of X, Y, and Z” and “at least one selected from the group consisting of X, Y, and Z” may be interpreted as any combination of only X, only Y, only Z, or two or more of X, Y, and Z. As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items.

[0043] 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 element. Therefore, without departing from the disclosed teachings, the first element discussed below may be referred to as the second element.

[0044] For descriptive purposes, spatially relative terms such as "under," "below," "below," "down," "above," "up," "above," "higher," "side" (e.g., as in "sidewall"), etc., may be used herein to describe the relationship of one element to another (other) element as shown in the figures. Spatially relative terms are intended to include different orientations of the device in use, operation, and / or manufacture in addition to the orientation depicted in the drawings. For example, if the device in the drawings is turned over, an element described as "under" or "beneath" other elements or features will subsequently be oriented to be "above" the other elements or features. Thus, the term "under" may include both above and below orientations. In addition, the device may be otherwise oriented (e.g., rotated 90 degrees or in other orientations), and as such, the spatially relative descriptors used herein are interpreted accordingly.

[0045] The terms used here are for the purpose of describing specific embodiments and are not intended to limit the terms. As used here, unless the context clearly indicates otherwise, the singular forms "one", "one (kind / person)" and "the (the)" are also intended to include plural forms. In addition, when the terms "include" and / or "comprise" and their variations are used in this specification, the stated features, integral bodies, steps, operations, elements, components and / or their groups are indicated, but the presence or addition of one or more other features, integral bodies, steps, operations, elements, components and / or their groups is not excluded. It should also be noted that, as used here, the terms "substantially", "approximately" and other similar terms are used as approximate terms, rather than as degree terms, and are thus used to explain the inherent deviations of measured values, calculated values ​​and / or provided values ​​that will be recognized by those of ordinary skill in the art.

[0046] Various embodiments are described herein with reference to cross-sectional views and / or exploded views as schematic diagrams of embodiments and / or intermediate structures. As such, variations in the shapes of the diagrams caused by, for example, manufacturing techniques and / or tolerances are contemplated. Therefore, the embodiments disclosed herein should not necessarily be interpreted as being limited to the specific shapes of the regions shown, but will include deviations in shape caused by, for example, manufacturing. In this way, the regions shown in the accompanying drawings may be schematic in nature, and the shapes of these regions may not reflect the actual shapes of the regions of the device, and as such, are not necessarily intended to be limiting.

[0047] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.

[0048] Figure 1 is a schematic plan view of a display device according to an embodiment, Figure 2 It is along Figure 1 A schematic cross-sectional view taken along line II'.

[0049] like Figure 1 and Figure 2 As shown in , the display device according to the embodiment may include a passivation layer 700 , a base substrate 100 , a light emitting element (or a display element) 200 , an encapsulation layer 300 , an adhesive layer 400 , a protective substrate 500 , a polarizing plate 600 , and a sidewall 800 .

[0050] The passivation layer 700 may perform a light blocking function and protect the lower surface of the base substrate 100. For example, the passivation layer 700 may prevent scratches from occurring on the lower surface of the base substrate 100. For example, the passivation layer 700 may be disposed on the lower surface of the base substrate 100.

[0051] The base substrate 100 may be disposed on the passivation layer 700. The base substrate 100 may be a bendable, foldable or rollable flexible substrate. For example, the base substrate 100 may include a polymer resin such as polyimide (PI), but the embodiment is not limited thereto. For another example, the base substrate 100 may include a glass material or a metal material. For example, the base substrate 100 may be, for example, ultra-thin glass. Through an etching process, the ultra-thin glass may have, for example, a very thin thickness. For example, the thickness may mean a size in the third direction DR3.

[0052] The light emitting element 200 may be disposed on the base substrate 100. For example, the light emitting element 200 may be disposed on the base substrate 100 in the third direction DR3. For example, the light emitting element 200 may be disposed in the display area of ​​the base substrate 100. The light emitting element 200 may include a light emitting element. The light emitting element may include an anode electrode, a light emitting layer, and a cathode electrode. The anode electrode, the light emitting layer, and the cathode electrode may be sequentially stacked along the third direction DR3. For example, the light emitting layer may be stacked on the anode electrode in the third direction DR3, and the cathode electrode may be disposed on the light emitting layer in the third direction DR3.

[0053] The light-emitting layer may be an organic light-emitting layer including an organic material. The light-emitting layer may include a hole transport layer, an organic light-emitting layer, and an electron transport layer. When the anode electrode receives a selected voltage through a thin film transistor and the cathode electrode receives a cathode voltage, holes and electrons may be transferred to the organic light-emitting layer through the hole transport layer and the electron transport layer, respectively, and may be combined with each other in the organic light-emitting layer to emit light.

[0054] In another example, the light emitting element may include a quantum dot light emitting diode including a quantum dot light emitting layer, an inorganic light emitting diode including an inorganic semiconductor, or a micro light emitting diode.

[0055] The encapsulation layer 300 may be disposed on the light emitting element 200. For example, the encapsulation layer 300 may be disposed on the light emitting element 200 in the third direction DR3. The encapsulation layer 300 may cover the top surface (or upper surface) and the side surface of the light emitting element 200 and protect the light emitting element 200. The encapsulation layer 300 may include at least one inorganic layer and at least one organic layer for encapsulating the light emitting element 200.

[0056] The adhesive layer 400 may be disposed on the encapsulation layer 300. For example, the adhesive layer 400 may be disposed on the encapsulation layer 300 in the third direction DR3. The adhesive layer 400 may be, for example, an ultraviolet curable adhesive such as optically clear resin (OCR).

[0057] The protective substrate 500 may be disposed on the adhesive layer 400. The protective substrate 500 may be a bendable, foldable, or rollable flexible substrate. For example, the protective substrate 500 may include a polymer resin such as polyimide (PI), but the embodiment is not limited thereto. For another example, the protective substrate 500 may include a glass material or a metal material.

[0058] The protective substrate 500 may overlap with the base substrate 100. For example, the entire protective substrate 500 may overlap with the base substrate 100. For example, the protective substrate 500 may have a smaller area (or a smaller size) than the base substrate 100. For example, the area (or size) of the protective substrate 500 along the first direction DR1 and the second direction DR2 may be smaller than the area (or size) of the base substrate 100 along the first direction DR1 and the second direction DR2. For example, in a plan view, an edge portion of the protective substrate 500 may be surrounded by an edge portion of the base substrate 100. For example, an edge portion of the base substrate 100 may extend farther than an edge portion of the protective substrate 500 in the first direction DR1 and the second direction DR2. As described above, since the area (or size) of the protective substrate 500 is smaller than the area (or size) of the base substrate 100, the ineffective area of ​​the display device may be minimized.

[0059] The polarizing plate 600 may be disposed on the protective substrate 500. For example, the polarizing plate 600 may be disposed on the protective substrate 500 in the third direction DR3. The polarizing plate 600 may include a linear polarizing layer and at least one retardation layer. The linear polarizing layer may be an optical layer that linearly polarizes light provided from the outside in one direction. The retardation layer may be a λ / 2 retardation layer and a λ / 4 retardation layer. The polarizing plate 600 may play a role in reducing reflection caused by external light.

[0060] The polarizing plate 600 may be overlapped with the base substrate 100. For example, the entire polarizing plate 600 may be overlapped with the base substrate 100. For example, the above-mentioned base substrate 100 may have a larger area (or a larger size) than the polarizing plate 600. For example, the area (or size) of the base substrate 100 along the first direction DR1 and the second direction DR2 may be larger than the area (or size) of the polarizing plate 600 along the first direction DR1 and the second direction DR2. For example, in a plan view, the edge portion of the base substrate 100 may surround the edge portion of the polarizing plate 600. For example, the edge portion of the base substrate 100 may extend farther than the edge portion of the polarizing plate 600 in the first direction DR1 and the second direction DR2. For example, the polarizing plate 600 may be overlapped with the protective substrate 500. For example, the entire protective substrate 500 may be overlapped with the polarizing plate 600. For example, the above-mentioned polarizing plate 600 may have an area (or a larger size) larger than the area (or size) of the protective substrate 500. For example, the area (or size) of the polarizing plate 600 along the first direction DR1 and the second direction DR2 may be larger than the area (or size) of the protective substrate 500 along the first direction DR1 and the second direction DR2. For example, in a plan view, an edge portion of the polarizing plate 600 may surround an edge portion of the protective substrate 500. For example, the edge portion of the polarizing plate 600 may extend more than the edge portion of the protective substrate 500 in the first direction DR1 and the second direction DR2.

[0061] For example, a color filter may be further disposed between the protection substrate 500 and the polarizing plate 600 .

[0062] like Figure 1 As shown in FIG. 8 , in a plan view, the side wall 800 may have a closed loop shape surrounding the polarizing plate 600. For example, Figure 1 and Figure 2 As shown in , in a plan view, the side wall 800 may have a closed loop shape surrounding the light emitting element 200 , the encapsulation layer 300 , the adhesive layer 400 , the protective substrate 500 , and the polarizing plate 600 .

[0063] like Figure 2 As shown in , the side wall 800 may be disposed on an edge portion of the top surface of the base substrate 100. For example, the side wall 800 may be disposed on the base substrate 100 in the third direction DR3, and the side wall 800 may be disposed (or extended) along an edge portion of the upper surface of the base substrate 100. The upper surface of the base substrate 100 may be a surface on which the above-mentioned light emitting element 200 is disposed.

[0064] The sidewall 800 may be disposed (or extended) along an edge portion of the upper surface of the base substrate 100. The sidewall 800 may face the edge portion of the upper surface of the base substrate 100 in the third direction DR3. For example, the sidewall 800 may contact the upper surface of the base substrate 100 at the edge portion of the upper surface of the base substrate 100.

[0065] The side wall 800 may be further disposed on the side surface of the adhesive layer 400, the side surface of the protective substrate 500, and the side surface of the polarizing plate 600. For example, the side wall 800 may be disposed on the edge portion of the upper surface of the above-mentioned base substrate 100 along the side surface of the adhesive layer 400, the side surface of the protective substrate 500, and the side surface of the polarizing plate 600. For example, the side wall 800 may be disposed on the edge portion of the upper surface of the base substrate 100 to cover the side surface of the adhesive layer 400, the side surface of the protective substrate 500, and the side surface of the polarizing plate 600. The side wall 800 may face the side surface of the adhesive layer 400, the side surface of the protective substrate 500, and the side surface of the polarizing plate 600 in the first direction DR1 or the second direction DR2. The side wall 800 may contact the side surface of the adhesive layer 400, the side surface of the protective substrate 500, and the side surface of the polarizing plate 600.

[0066] The side wall 800 may include a light absorbing material. For example, the side wall 800 may include an inorganic black pigment or an organic black pigment. The inorganic black pigment may be carbon black, and the organic black pigment may include at least one of lactam black, perylene black, and aniline black, but is not limited thereto. For example, the side wall 800 may be made of a material including any color other than black.

[0067] The side wall 800 may include a first side wall portion 800 a and a second side wall portion 800 b .

[0068] The first side wall portion 800a may be disposed on an edge portion of the upper surface of the base substrate 100. The first side wall portion 800a may be disposed along the side surface of the adhesive layer 400 and the side surface of the protective substrate 500. For example, the first side wall portion 800a may be disposed on an edge portion of the upper surface of the base substrate 100 to cover the side surface of the adhesive layer 400 and the side surface of the protective substrate 500. The inner surface of the first side wall portion 800a may contact the side surface of the adhesive layer 400 and the side surface of the protective substrate 500. The outer surface of the first side wall portion 800a may have a linear shape or a flat surface. The outer surface of the first side wall portion 800a may overlap the side surface of the base substrate 100. The outer surface of the first side wall portion 800a and the side surface of the base substrate 100 may be coplanar with each other (for example, in the third direction DR3). For example, the outer surface of the first side wall portion 800a and the side surface of the base substrate 100 may be disposed on an imaginary straight line along the third direction DR3.

[0069] The second side wall portion 800b may be disposed on the first side wall portion 800a. The second side wall portion 800b may be disposed along the side surface of the polarizing plate 600. For example, the second side wall portion 800b may be disposed on the first side wall portion 800a to cover the side surface of the polarizing plate 600. The inner surface of the second side wall portion 800b may be in contact with the side surface of the polarizing plate 600. The outer surface of the second side wall portion 800b may have a circular shape, a curved surface, or a convex surface. The second side wall portion 800b and the first side wall portion 800a may be integrated with each other.

[0070] The side wall 800 can improve the appearance quality of the display device. For example, the side wall 800 can flatten the steps between the side surface of the base substrate 100, the side surface of the protective substrate 500, and the side surface of the polarizing plate 600, thereby improving the appearance quality of the display device. For example, when the side wall 800 is made of a light blocking material, the light leakage phenomenon of the display device can be minimized. In addition, the side wall 800 can prevent moisture from penetrating.

[0071] In the following, reference will be made to Figure 2 , Figure 3 and Figure 4 A method of manufacturing a display device according to an embodiment is described as follows.

[0072] Figure 3 and Figure 4 is a diagram for describing a method of manufacturing a display device according to an embodiment.

[0073] First, if Figure 3 As shown in , a structure in which a passivation layer 700, a base substrate 100, a light emitting element (or a display element) 200, an encapsulation layer 300, and an adhesive layer 400 are stacked may be prepared. For example, a protective substrate 500 may be placed on the adhesive layer 400. The protective substrate 500 may be attached to the adhesive layer 400. In an embodiment, the adhesive layer 400 may be provided to be attached to the lower surface of the protective substrate 500. For example, the protective substrate 500 may include the adhesive layer 400.

[0074] Afterwards, if Figure 4 As shown in FIG. 5 , a polarizing plate 600 may be disposed on the protective substrate 500. The area (or size) of the polarizing plate 600 may be larger than the area (or size) of the protective substrate 500 and smaller than the area (or size) of the base substrate 100. Therefore, the side surface of the polarizing plate 600, the side surface of the protective substrate 500, and the side surface of the base substrate 100 may have a step (or step difference) in the first direction DR1.

[0075] Then, if Figure 1 and Figure 2As shown in , the side wall 800 may be disposed (or extended) along the edge portion of the upper surface of the base substrate 100. For example, the side wall 800 may be disposed on the edge portion of the upper surface of the base substrate 100 along the side surface of the adhesive layer 400, the side surface of the protective substrate 500, and the side surface of the polarizing plate 600.

[0076] For example, the sidewall 800 may be formed by a method of ejecting a material (e.g., an organic pigment) for the sidewall 800 using an inkjet device. For example, the organic pigment ejected from the nozzle of the inkjet device may be formed along the edge portion of the upper surface of the base substrate 100, the side surface of the adhesive layer 400, the side surface of the protective substrate 500, and the side surface of the polarizing plate 600. In an embodiment, for example, the sidewall 800 may be formed by a method of applying a material (hereinafter, referred to as a sidewall material, e.g., an organic pigment) for the sidewall 800 using an inkjet device. For example, the organic pigment discharged from the head of the inkjet device may be formed along the edge portion of the upper surface of the base substrate 100, the side surface of the adhesive layer 400, the side surface of the protective substrate 500, and the side surface of the polarizing plate 600. In an embodiment, the sidewall 800 may be formed by a method of applying a sidewall material (e.g., an organic pigment) using an electrohydrodynamic (EHD) printing device. For example, the organic pigment discharged from the nozzle of an electrohydrodynamic (EHD) printing apparatus may be formed along edge portions of the upper surface of the base substrate 100 , side surfaces of the adhesive layer 400 , side surfaces of the protective substrate 500 , and side surfaces of the polarizing plate 600 .

[0077] For example, the organic pigment formed along the edge portion of the upper surface of the base substrate 100, the side surface of the adhesive layer 400, the side surface of the protective substrate 500, and the side surface of the polarizing plate 600 can be cured by a curing process. The curing process may include at least one of, for example, an ultraviolet curing process, a thermal curing process, and a room temperature curing process. For example, the organic pigment can be cured by applying ultraviolet rays or heat to the organic pigment. In another example, the organic pigment can be cured naturally by leaving it at room temperature for a specific period of time. The cured organic pigment can be used as a side wall 800. The side wall 800 can flatten the step (or step difference) between the side surface of the base substrate 100, the side surface of the protective substrate 500, and the side surface of the polarizing plate 600, thereby improving the appearance quality of the display device.

[0078] Figure 5 is a schematic cross-sectional view of a display device according to an embodiment, and may be a cross-sectional view of a display device according to an embodiment. Figure 1 A schematic cross-sectional view taken along line II'.

[0079] Figure 5 The display device and Figure 2The display device of is different in that a touch sensing unit 900 is further included, and the difference will be mainly described as follows.

[0080] The touch sensing unit 900 may be disposed on the encapsulation layer 300. For example, the touch sensing unit 900 may be disposed between the encapsulation layer 300 and the adhesive layer 400. The touch sensing unit 900 may include a touch electrode for sensing a user's touch in a capacitive manner and a touch line connecting the touch electrode to a touch driver. For example, the touch sensing unit 900 may sense a user's touch by using a mutual capacitance method or a self capacitance method.

[0081] For another example, the touch sensing unit 900 may be disposed on a separate substrate disposed in the display region of the display device. For example, the substrate supporting the touch sensing unit 900 may be a base member encapsulating the display region.

[0082] The touch electrodes of the touch sensing unit 900 may be disposed in a touch sensor region overlapping the display region of the display device. The touch lines of the touch sensing unit 900 may be disposed in a touch peripheral region overlapping the non-display region of the display device.

[0083] At the end of the detailed description, it will be appreciated by those skilled in the art that many changes and modifications may be made to the embodiments without departing substantially from the principles, spirit and scope of the disclosure. Therefore, the disclosed embodiments are used in a general and descriptive sense only and not for purposes of limitation.

Claims

1. A display device, comprising: base substrate; A light emitting element is disposed on the base substrate; A protective substrate, disposed on the light emitting element; a polarizing plate, disposed on the protective substrate; as well as The side wall is arranged on the edge portion of the upper surface of the base substrate.

2. The display device according to claim 1, wherein: The sidewall extends along the edge portion of the upper surface of the base substrate.

3. The display device according to claim 1, wherein: The side wall is further provided on a side surface of the protection substrate and a side surface of the polarizing plate.

4. The display device according to claim 1, wherein: The side wall extends along a side surface of the protection substrate and a side surface of the polarizing plate.

5. The display device according to claim 4, wherein: The side wall surrounds the protection substrate and the polarizing plate.

6. The display device according to claim 1, wherein: The protection substrate has a size smaller than that of the base substrate.

7. The display device according to claim 6, wherein: In a plan view, an edge portion of the protection substrate is surrounded by the edge portion of the base substrate.

8. The display device according to claim 1, wherein: The base substrate has a size greater than that of the polarizing plate.

9. The display device according to claim 8, wherein: In a plan view, the edge portion of the base substrate surrounds an edge portion of the polarizing plate.

10. The display device according to claim 1, further comprising: The encapsulation layer is arranged on the light emitting element.

11. The display device according to claim 10, further comprising: The adhesive layer is disposed between the encapsulation layer and the protective substrate.

12. The display device according to claim 11, wherein: The side wall is further disposed on a side surface of the adhesive layer.

13. The display device according to claim 12, wherein: The side wall extends along the side surface of the adhesive layer.

14. The display device according to claim 13, wherein: The side wall surrounds the adhesive layer.

15. The display device according to claim 1, wherein: The side wall comprises: a first side wall portion provided on the edge portion of the upper surface of the base substrate to cover a side surface of the protection substrate; and A second side wall portion is disposed on an edge portion of the first side wall portion to cover a side surface of the polarizing plate.

16. The display device according to claim 15, wherein: The outer surface of the first side wall portion has a linear shape, and An outer surface of the second side wall portion has a circular shape.

17. The display device according to claim 16, wherein: The outer surface of the first sidewall portion and a side surface of the base substrate are coplanar with each other.

18. The display device according to claim 17, wherein: The first side wall portion and the second side wall portion are integral with each other.

19. The display device according to claim 1, wherein: The sidewall includes an inorganic black pigment or an organic black pigment.

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