Display device

Abstract

A display device according to an exemplary embodiment of the present disclosure includes: a display panel including a plurality of sub-pixels; a cover glass disposed over the display panel, the cover glass including a first region and a second region; and a metal plate disposed below the display panel, the metal plate including a first metal plate corresponding to the first area and a second metal plate corresponding to the second area. The first metal sheet and the second metal sheet may be fastened together by a press fit in a fastening region between the first region and the second region. As a result, separation between the cover glass and the display panel in the partially curved portion can be suppressed.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to Korean Patent Application No. 10-2024-0165269, filed on November 19, 2024, with the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference. Technical Field

[0003] This disclosure relates to a display device, and more specifically, to a display device having a side-bending structure. Background Technology

[0004] With the advent of the information age, the field of display devices that visually express electrical information signals has developed rapidly, and research continues to improve the performance of various display devices, such as thinness, light weight, and low power consumption.

[0005] Among various display devices, electroluminescent display devices, represented by organic light-emitting display devices, are self-emissive display devices that do not require a separate light source, thus allowing them to be manufactured with light weight and thinness. In addition, electroluminescent display devices are advantageous not only in terms of power consumption due to low voltage driving, but also in terms of color realization, response speed, viewing angle, and contrast ratio (CR).

[0006] Design elements of display devices are becoming an important factor in purchasing decisions, hence the ongoing research and development to provide display devices in various shapes.

[0007] As an example of a display device with an improved design, there may be a curved display device where the sides are bent, or a display device with a side-bending structure. Display devices with such side-bending structures are being actively researched and developed because the overall aesthetics of the display device are improved due to the side bending, and additional functions can be achieved by displaying images on the bent sides.

[0008] Meanwhile, in display devices with a side-bending structure, due to the local curvature of a certain part, the bent display panel cannot maintain its bent state, so there is a problem that the cover glass and the display panel separate in the part with local curvature. Summary of the Invention

[0009] The objective achieved by this disclosure is to provide a display device having a side-bending structure with side bending.

[0010] Another objective achieved by this disclosure is to provide a display device having a side bending structure that suppresses separation between the cover glass and the display panel in a locally bent portion.

[0011] The purpose of this disclosure is not limited to the above-mentioned purposes, and other purposes not mentioned above will be clearly understood by those skilled in the art based on the following description.

[0012] To achieve the above objectives, according to one aspect of the present disclosure, a display device includes: a display panel including a plurality of sub-pixels; a cover glass disposed above the display panel, the cover glass including a first region and a second region; and a metal plate disposed below the display panel, the metal plate including a first metal plate corresponding to the first region and a second metal plate corresponding to the second region, the first metal plate and the second metal plate being fastened together by press fitting in a fastening region between the first region and the second region.

[0013] According to another aspect of this disclosure, a display device includes: a display panel including a plurality of sub-pixels; a cover glass disposed above the display panel, the cover glass including a first region having a first curvature and a second region having a second curvature greater than the first curvature; and a metal plate disposed below the display panel, the metal plate including a first metal plate corresponding to the first region and a second metal plate corresponding to the second region, the first metal plate and the second metal plate being fastened together by press fitting in a fastening region between the first region and the second region.

[0014] Further details of the exemplary embodiments are included in the specific implementation and the accompanying drawings.

[0015] According to this disclosure, separate metal plates are attached to the rear surface of the display panel to press them together, thereby maintaining a specific radius of curvature without external force. Therefore, separation between the cover glass and the display panel in locally curved portions can be prevented.

[0016] The effects of this disclosure are not limited to those illustrated above, and many more effects are included in this specification. Attached Figure Description

[0017] The above and other aspects, features, and other advantages of this disclosure will become clearer from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0018] Figure 1 This is a perspective view of a display device according to an exemplary embodiment of the present disclosure;

[0019] Figure 2 It is along Figure 1 A cross-sectional view of the display device taken by line II′;

[0020] Figure 3 yes Figure 2 A cross-sectional view of the display panel;

[0021] Figure 4A and Figure 4B It is along Figure 1 A cross-sectional view of the display device taken by line II-II′;

[0022] Figure 5 It is along Figure 1 A cross-sectional view of the organic light-emitting diode layer taken from line III-III′;

[0023] Figure 6 yes Figure 4B Rear view of the display device;

[0024] Figure 7A yes Figure 4A Rear view of the first adhesive layer and resin layer;

[0025] Figure 7B yes Figure 4B Rear view of the first adhesive layer and resin layer;

[0026] Figure 8A and Figure 8B It's enlarged. Figure 6 A view of part A;

[0027] Figure 9 It's enlarged. Figure 6 A perspective view of part A;

[0028] Figure 10A It is along Figure 9 A cross-sectional view of the metal plate cut by line IV-IV′;

[0029] Figure 10B It is along Figure 9 A cross-sectional view of the metal plate cut by line VV′;

[0030] Figure 11A and Figure 11B This is a cross-sectional view of a metal plate according to another exemplary embodiment of the present disclosure;

[0031] Figure 12A and Figure 12B This is a view showing a portion of a metal plate according to yet another exemplary embodiment of the present disclosure;

[0032] Figure 13A and Figure 13B This is a view showing a portion of a metal plate according to yet another exemplary embodiment of the present disclosure;

[0033] Figures 14A to 14F This is a cross-sectional view showing a method of attaching a display panel to a curved cover glass according to exemplary embodiments of the present disclosure; and

[0034] Figures 15A to 15DThis is a cross-sectional view illustrating a portion of another method of attaching a display panel to a curved cover glass according to an exemplary embodiment of the present disclosure. Detailed Implementation

[0035] The advantages and features of this disclosure, as well as methods for achieving these advantages and features, will become clear from the exemplary embodiments described in detail below with reference to the accompanying drawings. However, this disclosure is not limited to the exemplary embodiments disclosed herein, but will be implemented in various forms. The exemplary embodiments are provided by way of example only so that those skilled in the art can fully understand the disclosure and scope of this disclosure.

[0036] The shapes, dimensions, ratios, angles, quantities, etc., shown in the accompanying drawings used to describe exemplary embodiments of this disclosure are merely examples, and this disclosure is not limited thereto. Throughout the specification, the same reference numerals generally denote the same elements. Furthermore, in the following description of this disclosure, detailed explanations of known related technologies may be omitted to avoid unnecessarily obscuring the subject matter of this disclosure. Terms such as “comprising,” “having,” and “consisting of” as used herein are generally intended to allow for the addition of additional components, unless these terms are used in conjunction with the term “only.” Unless otherwise expressly stated, any reference to the singular may include the plural.

[0037] Even without explicit explanation, components are interpreted as including the normal tolerance range.

[0038] When using terms such as “above,” “over,” “below,” and “beside” to describe the positional relationship between two parts, one or more parts may be located between the two parts, unless these terms are used with the terms “immediately adjacent” or “directly.”

[0039] When an element or layer is placed "on" another element or layer, the other layer or element can be directly inserted on or between the other element.

[0040] Although the terms "first," "second," etc., are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from others. Therefore, the first component mentioned below can be the second component in the technical concept of this disclosure.

[0041] Throughout the specification, the same reference numerals generally denote the same elements.

[0042] For ease of description, the dimensions and thicknesses of the various components shown in the accompanying drawings are illustrated, and this disclosure is not limited to the dimensions and thicknesses of the components shown.

[0043] Features of the various embodiments of this disclosure may be combined or integrated with each other in part or in whole, and may be interconnected and operated in a variety of technical ways, and the embodiments may be performed independently or in association with each other.

[0044] In the following, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0045] Figure 1 This is a perspective view of a display device according to an exemplary embodiment of the present disclosure.

[0046] Reference Figure 1 The display device 1 according to an exemplary embodiment of the present disclosure includes a display panel having a substrate which will be described below and a plurality of sub-pixels disposed on the substrate.

[0047] The display panel of this display device 1 can be of various types, such as an organic light-emitting display panel or a liquid crystal display panel. For ease of description, an organic light-emitting display panel will be used as an example in the following description.

[0048] The display device 1 according to an exemplary embodiment of the present disclosure may include a first region A1 and a second region A2.

[0049] The first region A1 can be a flat region, and the second region A2 can be a curved region. The first region A1 can be a flat part, and the second region A2 can be a curved or bent part.

[0050] For example, the second region A2 is disposed on both sides of the first region A1, such that the gradient increases with distance from the first region A1. However, this disclosure is not limited to this, and each of the second regions A2 disposed on the two sides of the first region A1 can be disposed with a different curvature. Furthermore, the second region A2 can be disposed on only one side of the first region A1, or it can be disposed on all sides of the first region A1. For example, when the first region A1 has four sides, the second region A2 can be disposed on one or more of the four sides, or it can be disposed on all four sides.

[0051] As described above, a display device with a curved portion on one side can be referred to as a display device with a side-bending structure or a curved display device.

[0052] The display device 1 according to an exemplary embodiment of the present disclosure may include an active region AA and an passive region NA. The active region AA and the passive region NA may be respectively disposed in a first region A1 and a second region A2 of the display device 1.

[0053] The active area AA is the area in the display device 1 where an image is displayed, and display elements and various driving elements for driving the display elements can be set in the active area AA.

[0054] For example, the display element can be configured as a light-emitting diode including a first electrode, a light-emitting layer, and a second electrode. Furthermore, various driving elements for driving the display element, such as thin-film transistors, capacitors, or wiring, can be disposed in the active region AA.

[0055] Multiple subpixels (SPs) may be included in the active area (AA). A subpixel (SP) is the smallest unit constituting an image, and each of the multiple subpixels (SPs) may include a light-emitting diode (LED) and driving circuitry. The multiple subpixels (SPs) may emit light of different wavelengths. For example, the multiple subpixels (SPs) may include at least one red subpixel, a green subpixel, and a blue subpixel, but are not limited to this, and the multiple subpixels (SPs) may also include a white subpixel.

[0056] The driving circuit of the sub-pixel SP is a circuit used to control the driving of the light-emitting diode. For example, the driving circuit can be configured to include thin-film transistors and capacitors, but is not limited to this.

[0057] The non-active region NA is the area where no image is displayed, and various components for driving the multiple sub-pixels SP disposed in the active region AA can be set in the non-active region NA. For example, a driver IC and a flexible film for supplying signals for driving the multiple sub-pixels SP can be set in the non-active region NA.

[0058] The non-active region NA can be the region surrounding the active region AA, such as... Figure 1 As shown. However, it is not limited to this; for example, the non-active region NA can be a region that extends from the active region AA.

[0059] Figure 2 It is along Figure 1 A cross-sectional view of the display device taken from line II′.

[0060] Figure 3 yes Figure 2 A cross-sectional view of the display panel.

[0061] Figure 4A and Figure 4B It is along Figure 1 A cross-sectional view of the display device taken from line II-II′.

[0062] Figure 2 It shows the section cut along the X-axis. Figure 1 The cross-sectional structure of the display device 1 is taken as an example, and Figure 3 It shows Figure 2 The cross-sectional structure of the display panel 110.

[0063] Figure 4A and Figure 4B This shows the section cut along the Y-axis. Figure 1 Various examples of the cross-sectional structure of the display device 1 are shown, and for ease of description, the display panel 110 before bending is shown.

[0064] Reference Figure 2 The display device 1 according to an exemplary embodiment of the present disclosure may include a display panel 110, a cover glass 190, and a metal plate 160.

[0065] The display panel 110 according to an exemplary embodiment of the present disclosure may be a flexible display panel, and the entire display panel 110 has excellent elasticity and flexibility, so that it can not only remain flat, but also be freely bent or folded. As described above, in the following description, the display panel 110 will be described as a flexible organic light-emitting display panel, but the present disclosure is not limited thereto, and can also be applied to another display panel that ensures flexibility in the same way.

[0066] The cover glass 190 can be disposed on the top of the display device 1.

[0067] Cover glass 190 protects the upper part of display panel 110 and can be formed of tempered glass, transparent plastic, or transparent film. For example, cover glass 190 can contain any of sapphire glass and Gorilla glass. Furthermore, cover glass 190 can contain any of polyethylene terephthalate (PET), polycarbonate (PC), polyethylene naphthalate (PEN), polyethersulfone (PES), and polynorbornene (PNB).

[0068] The metal plate 160 can be disposed on the rear surface of the display panel 110.

[0069] According to an exemplary embodiment of the present disclosure, a metal plate 160 is attached to the rear surface of a display panel 110 to maintain a predetermined radius of curvature of the display panel 110 without external force, as will be referred to below. Figure 6 Figure 8 describes this.

[0070] The first adhesive layer 140a can be disposed between the display panel 110 and the metal plate 160.

[0071] The first adhesive layer 140a can be disposed on the entire surface of the display panel 110 and the metal plate 160, except for the fastening area between the first region A1 and the second region A2. For example, the first adhesive layer 140a can be made of pressure-sensitive adhesive (PSA), but is not limited thereto.

[0072] The second adhesive layer 140b can be disposed between the cover glass 190 and the display panel 110.

[0073] The second adhesive layer 140b can be disposed on the entire surface between the cover glass 190 and the display panel 110. The second adhesive layer 140b can be made of optically clear adhesive (OCA) or optically clear resin (OCR), but is not limited thereto.

[0074] Reference Figure 3 , Figure 4A and Figure 4B As described above, the cover glass 190 can be positioned above the display panel 110.

[0075] For example, the cover glass 190 can be divided into a first part 190a corresponding to the first region A1 and two second parts 190b corresponding to the second region A2.

[0076] The second part 190b can be set on both sides of the first part 190a.

[0077] The first part 190a may be a region formed as a flat surface, but is not limited thereto, and may also be a region formed as a curved surface.

[0078] The second part 190b can be a region formed as a curved surface.

[0079] When the first portion 190a is a region formed as a curved surface, the first portion 190a and the second portion 190b can be formed from different curved surfaces. In this case, for example, the second portion 190b can be formed from a curved surface having a curvature greater than that of the first portion 190a.

[0080] In addition, the metal plate 160 may be disposed on the rear surface of the display panel 110.

[0081] For example, the metal plate 160 can be divided into a first metal plate 160a corresponding to the first region A1 and two second metal plates 160b corresponding to the second region A2.

[0082] The second metal plate 160b can be disposed on both sides of the first metal plate 160a, but is not limited thereto.

[0083] The first adhesive layer 140a can be disposed between the display panel 110 and the metal plate 160.

[0084] Meanwhile, instead of the first adhesive layer 140a, the cured resin layers 145 and 145' can be disposed in the boundary region or fastening region BA between the first region A1 and the second region A2 (i.e., between the first metal plate 160a and the second metal plate 160b).

[0085] For example, resin layers 145 and 145′ may be made of pressure-sensitive adhesive with a modulus lower than that of thermosetting resin or first adhesive layer 140a, but are not limited thereto.

[0086] For example, resin layers 145 and 145' can be positioned along the fastening region BA in a direction parallel to the Y-axis (see [reference]). Figure 1 (in the direction of, but not limited to)

[0087] The width of resin layer 145 can be set to be greater than the width of fastening area BA (see [reference]). Figure 4A Furthermore, the resin layer 145′ can be provided with a width substantially the same as that of the fastening area BA (see [reference]). Figure 4B ).

[0088] Resin layers 145 and 145' facilitate sliding, allowing the first metal plate 160a and the second metal plate 160b to be easily fastened. After fastening, resin layers 145 and 145' are cured to fix the sliding and movement in the thickness direction. After thermosetting, resin layers 145 and 145' can perform an adhesive function, similar to the first adhesive layer 140a.

[0089] The second adhesive layer 140b can be disposed between the cover glass 190 and the display panel 110.

[0090] The display panel 110 may include a back panel 105, an organic light-emitting diode layer 115, and a polarizing layer 109, which are laminated sequentially.

[0091] The backplate 105 is preferably a film component that has both rigidity and elasticity for protecting the organic light-emitting diode layer 115 while being easily bendable. The backplate 105 is bonded to the organic light-emitting diode layer 115 by a third adhesive layer 106a, which is coated on a surface and has the property of suppressing the generation of air bubbles.

[0092] The third adhesive layer 106a may be disposed on the entire surface between the organic light-emitting diode layer 115 and the backplate 105, but is not limited thereto. For example, the third adhesive layer 106a may be made of pressure-sensitive adhesive (PSA), but is not limited thereto.

[0093] The polarizing layer 109 can be deposited above the organic light-emitting diode layer 115 through a lamination process.

[0094] The polarizing layer 109 may be composed of a polarizing film and is used to improve the visibility of the display panel 110 by suppressing reflections caused by external light. For example, the polarizing layer 109 may be disposed on the top of the display panel 110. In this case, the polarizing layer 109 may be bonded to the cover glass 190 via the second adhesive layer 140b.

[0095] The fourth adhesive layer 106b can be disposed between the polarizing layer 109 and the organic light-emitting diode layer 115.

[0096] The fourth adhesive layer 106b may be disposed on the entire surface between the polarizing layer 109 and the organic light-emitting diode layer 115, but is not limited thereto. For example, the fourth adhesive layer 106b may be made of pressure-sensitive adhesive (PSA), but is not limited thereto.

[0097] However, this disclosure is not limited thereto, and allows a touch film for direct touch of the screen to input user information to be attached to the polarizing layer 109. In this case, a second adhesive layer 140b is coated on the surface of the touch film bonded to the display panel 110 and bonded to the inside of the cover glass 190.

[0098] Although not shown, the encapsulation layer may be disposed below the polarizing layer 109.

[0099] The encapsulation layer can protect the organic light-emitting diode layer 115 from oxygen or moisture.

[0100] In some cases, a touch sensor layer is disposed between the polarizing layer 109 and the encapsulation layer to enable touch functionality in the display panel 110. This touch sensor layer is implemented using a touch film to sense changes in capacitance caused by touch.

[0101] The organic light-emitting diode layer 115 can be disposed below the encapsulation layer.

[0102] The organic light-emitting diode layer 115 displays an image corresponding to a data signal supplied from the display driving circuit, and may include, for example, a substrate and a pixel array.

[0103] The backplate 105 can be disposed below the organic light-emitting diode layer 115.

[0104] The backplate 105 is attached to the lower part of the organic light-emitting diode layer 115 to protect the lower part of the organic light-emitting diode layer 115.

[0105] The polarizing layer 109, encapsulation layer, organic light-emitting diode layer 115, and backplane 105 described above can be defined as display panel 110.

[0106] The display panel 110 is easily bendable for use in various types of display devices. In this disclosure, the display panel 110 is attached to the inside of a U-shaped cover glass 190, the sides of which are slightly bent to form a curved display panel 110. This curved display panel uses not only the upper surface but also the bent sides as active areas.

[0107] Figure 5 It is along Figure 1A cross-sectional view of the organic light-emitting diode layer taken from line III-III′.

[0108] Reference Figure 5 The organic light-emitting diode layer 115 according to an exemplary embodiment of the present disclosure may include a substrate 101, a thin film transistor 120, an outer coating 113, a dam layer 114, a light-emitting diode 150, and a packaging unit 170.

[0109] The display device can be implemented as a top-emitting type, but is not limited to this, and can also be applied to a bottom-emitting type.

[0110] The substrate 101 can support and protect several components of the organic light-emitting diode layer 115.

[0111] The substrate 101 can be formed from a flexible glass or plastic material.

[0112] The buffer layer 111 can be disposed on the substrate 101.

[0113] At this time, the buffer layer 111 can improve the adhesion strength between the layer formed above the buffer layer 111 and the substrate 101, and block alkaline components from leaking from the substrate 101. Depending on the type or material of the substrate 101 and the structure and type of the thin-film transistor 120, the buffer layer 111 can be omitted.

[0114] The thin-film transistor 120 can be disposed above the substrate 101.

[0115] The thin-film transistor 120 can be used as a driving element for a display device.

[0116] The thin-film transistor 120 may include a gate 121, an active layer 122, a source 123, and a drain 124.

[0117] The gate 121 of the thin-film transistor 120 can be disposed above the substrate 101.

[0118] The gate insulating layer 112 can be disposed on the gate 121.

[0119] The gate insulating layer 112 is a layer used to electrically insulate the gate 121 from the active layer 122, and may be formed of an insulating material.

[0120] The active layer 122 can be disposed on the gate insulating layer 112.

[0121] The active layer 122 can be configured to overlap with the gate 121.

[0122] An etch stop layer 125 may be disposed on the active layer 122. However, the etch stop layer 125 may be omitted.

[0123] Meanwhile, the source 123 and drain 124 can be disposed above the active layer 122 and the etch barrier layer 125. The source 123 and drain 124 can be disposed on the same layer but spaced apart from each other. The source 123 and drain 124 can contact and be electrically connected to the active layer 122, but are not limited thereto, and can be electrically connected to the active layer through contact holes.

[0124] The outer coating 113 can be disposed above the thin-film transistor 120.

[0125] The outer coating 113 can protect the thin-film transistor 120 and make the steps of the layer disposed above the substrate 101 smooth. The outer coating 113 can also be referred to as a planarization layer.

[0126] The light-emitting diode 150 can be disposed above the outer coating 113.

[0127] At this time, the light-emitting diode 150 may include a first electrode 151 disposed on the outer coating 113, a light-emitting layer 152 disposed on the first electrode 151, and a second electrode 153 disposed on the light-emitting layer 152.

[0128] The first electrode 151 may be disposed on the outer coating 113 and cover a portion of the top surface. The first electrode 151 may be electrically connected to the thin-film transistor 120.

[0129] When the display device according to an exemplary embodiment of the present disclosure is a top-emitting display device, the first electrode 151 can be configured to include a reflective layer and a transparent conductive layer disposed on the reflective layer. The reflective layer can reflect light emitted from the light-emitting diode 150 upwards. The reflective layer can be electrically connected to the drain electrode 124 through contact holes formed in the outer coating layer 113. However, it is not limited to this; the reflective layer can also be electrically connected to the source electrode 123 through contact holes formed in the outer coating layer 113.

[0130] A transparent conductive layer of the first electrode 151 is disposed on the reflective layer to be electrically connected to the drain electrode 124 through the reflective layer. The transparent conductive layer may be formed of a conductive material with a high work function to supply holes to the light-emitting layer 152.

[0131] The dam layer 114 can be disposed on the first electrode 151 and the outer coating layer 113.

[0132] The dam layer 114 can be configured to cover the end of the first electrode 151 of the light-emitting diode 150 in a partial region to define the light-emitting region EA and the non-light-emitting region NEA. For example, the dam layer 114 is disposed between the first electrode 151 and the light-emitting layer 152 in the non-light-emitting region NEA to block the generation of light in the non-light-emitting region NEA.

[0133] Furthermore, the dam layer 114 is not disposed in the light-emitting region EA, so that the light-emitting layer 152 is directly located on the first electrode 151 so that the light-emitting layer 152 can generate light.

[0134] The embankment layer 114 can be formed from organic materials.

[0135] The embankment layer 114 includes a top surface, a bottom surface, and side surfaces, and the top surface may be narrower than the bottom surface. In this case, the top surface of the embankment layer 114 is the surface located at the top of the embankment layer 114 and may be substantially parallel to the outer coating layer 113. The bottom surface of the embankment layer 114 may be the surface that contacts the outer coating layer 113 at the bottom of the embankment layer 114. Furthermore, the side surfaces of the embankment layer 114 may be the surfaces connecting the top and bottom surfaces of the embankment layer 114 and may have a shape that slopes from the top surface toward the bottom surface.

[0136] The light-emitting layer 152 can be disposed on the first electrode 151 and the dam layer 114. For example, the light-emitting layer 152 can be disposed on the first electrode 151 in the light-emitting region EA and on the dam layer 114 in the non-light-emitting region NEA.

[0137] The light-emitting layer 152 is a layer for emitting light of a specific color, and may include at least one of a red light-emitting layer, a green light-emitting layer, a blue light-emitting layer, and a white light-emitting layer. Furthermore, the light-emitting layer 152 may also include various layers, such as a hole transport layer, a hole injection layer, a hole blocking layer, an electron injection layer, an electron blocking layer, or an electron transport layer. The light-emitting layer 152 may be an organic light-emitting layer formed of organic materials, but is not limited thereto. For example, the light-emitting layer 152 may be a quantum dot light-emitting layer or a micro LED.

[0138] The light-emitting layer 152 is disposed above the embankment 114 in the non-light-emitting area NEA, so that the light-emitting layer 152 can also be set according to the shape of the embankment 114.

[0139] The second electrode 153 can be disposed on the light-emitting layer 152.

[0140] The second electrode 153 supplies electrons to the light-emitting layer 152. However, since the display device is a top-emitting type, the second electrode 153 has a very thin thickness, so that the refractive index of the second electrode 153 does not affect the propagation of light.

[0141] Since the second electrode 153 is disposed above the light-emitting layer 152 in the non-light-emitting region NEA, the second electrode 153 can also be disposed according to the shape of the light-emitting layer 152.

[0142] The packaging unit 170 can be positioned above the light-emitting diode 150.

[0143] The encapsulation unit 170 can be configured to cover the second electrode 153.

[0144] The encapsulation unit 170 can protect the light-emitting diode 150 from moisture or oxygen that may seep in from the outside of the display device.

[0145] The packaging unit 170 may include a first packaging layer 171, a second packaging layer 172, and a third packaging layer 173.

[0146] The first encapsulation layer 171 is disposed on the second electrode 153 to inhibit the penetration of moisture or oxygen.

[0147] The first encapsulation layer 171 is disposed above the second electrode 153, so that the first encapsulation layer 171 can also be configured according to the shape of the second electrode 153.

[0148] A second encapsulation layer 172 is disposed on the first encapsulation layer 171 to planarize the surface. Furthermore, the second encapsulation layer 172 can cover foreign matter or particles that may be generated during the manufacturing process.

[0149] The third encapsulation layer 173 can be disposed on the second encapsulation layer 172.

[0150] The third encapsulation layer 173 can inhibit the penetration of moisture and oxygen, just like the first encapsulation layer 171.

[0151] Furthermore, the display device according to the exemplary embodiments of this disclosure is a top-emitting display device, which can be manufactured to realize a microcavity. For example, in the display device according to the exemplary embodiments of this disclosure, the distance between the reflective layer of the first electrode 151 and the second electrode 153 is set to achieve constructive interference of light emitted from the light-emitting layer 152. Therefore, optical efficiency can be improved.

[0152] According to this disclosure, separate metal plates are attached to the rear surface of the display panel to press them together, thus maintaining a specific radius of curvature without external force, as will be described in detail with reference to the accompanying drawings.

[0153] Figure 6 yes Figure 4B Rear view of the display device.

[0154] Figure 7A yes Figure 4A Rear view of the first adhesive layer and resin layer.

[0155] Figure 7B yes Figure 4B Rear view of the first adhesive layer and resin layer.

[0156] Figure 8A and 8B It's enlarged. Figure 6 A view of part A.

[0157] Figure 9 It's enlarged. Figure 6 Perspective view of part A.

[0158] Figure 10A It is along Figure 9 A cross-sectional view of the metal plate taken by line IV-IV′.

[0159] Figure 10B It is along Figure 9 A cross-sectional view of the metal plate cut by line VV′.

[0160] Figure 8A A portion of the rear surface of the display device is shown as an example before the first protrusion 165a and the second protrusion 165b are fastened to the first groove 163a and the second groove 163b.

[0161] Figure 8B A portion of the rear surface of the display device is shown as an example after the first protrusion 165a and the second protrusion 165b and the first groove 163a and the second groove 163b are fastened to the first metal plate 160a and the second metal plate 160b.

[0162] Figure 9 It is shown Figure 6 A perspective view of part A of the display device, and an enlarged view of a portion of the metal plate 160 after it has been secured.

[0163] Figure 10A and Figure 10B It shows along Figure 9 The cross-sectional view of the metal plate 160 taken from lines IV-IV′ and VV′, and the cross-sectional view of the first adhesive layer 140a and the resin layer 145′.

[0164] Reference Figures 6 to 10A and Figure 10B The metal plate 160 can be set on the bottom of the display device.

[0165] The metal plate 160 of the exemplary embodiments of this disclosure is configured to be attached to the rear surface of the display panel to maintain a predetermined radius of curvature of the display panel without external force.

[0166] For example, the metal plate 160 may be made of Invar steel, which is an iron / nickel alloy, but is not limited thereto, and the metal plate 160 of this disclosure may be made of aluminum (Al), stainless steel (STS) or copper (Cu).

[0167] Furthermore, for example, the metal plate 160 may include a first metal plate 160a corresponding to the first region A1 and two second metal plates 160b corresponding to the second region A2. For example, one second metal plate 160b is disposed on one side of the first metal plate 160a, and the other second metal plate 160b is disposed on the other side of the first metal plate 160a.

[0168] However, this disclosure is not limited thereto, such that when the second region A2 is provided only on one side of the first region A1, the metal plate 160 may include a second metal plate 160b on one side of the first metal plate 160a.

[0169] For example, the first metal plate 160a may include a plurality of first protrusions 165a protruding toward the second metal plate 160b and a plurality of first grooves 163a between the plurality of first protrusions 165a. The plurality of first protrusions 165a and the plurality of first grooves 163a may be disposed on both sides of the first metal plate 160a. Furthermore, the plurality of first protrusions 165a and the plurality of first grooves 163a may be disposed alternately.

[0170] For example, the second metal plate 160b may include a plurality of second protrusions 165b projecting toward the first metal plate 160a and a plurality of second grooves 163b between the plurality of second protrusions 165b. The plurality of second protrusions 165b and the plurality of second grooves 163b may be disposed on the side of the second metal plate 160b facing the first metal plate 160a. The plurality of second protrusions 165b and the plurality of second grooves 163b may be disposed alternately.

[0171] For example, the first groove 163a may have a width and length sufficient to accommodate the second protrusion 165b, and the second groove 163b may have a width and length sufficient to accommodate the first protrusion 165a.

[0172] At this time, the first protrusion 165a may have a first end 165a′ protruding toward the second groove 163b, and the first end 165a′ may have a circle with increased width.

[0173] Furthermore, the second protrusion 165b may have a second end 165b′ protruding toward the first groove 163a, and the second end 165b′ may have a circle with increased width.

[0174] Before fastening, the first end 165a′ of the first protrusion 165a and the second end 165b′ of the second protrusion 165b are in contact with each other and cannot be inserted into the second groove 163b and the first groove 163a. ​​Therefore, when fastening the first metal plate 160a and the second metal plate 160b, the first end 165a′ of the first protrusion 165a and the second end 165b′ of the second protrusion 165b are press-fitted to fasten with the second groove 163b and the first groove 163a. ​​At this time, in the press-fit state, a portion of the first end 165a′ of the first protrusion 165a can contact a portion of the second end 165b′ of the second protrusion 165b. The restoring force of the display panel is offset by the stress of the press-fitted first metal plate 160a and the second metal plate 160b, so that the display panel is attached to the cover glass 190 while maintaining the local curvature.

[0175] As described above, the first end 165a′ of the first protrusion 165a and the second end 165b′ of the second protrusion 165b are press-fitted to secure the display panel, so that the display panel can maintain a specific radius of curvature without external force.

[0176] Molding, laser cutting, or etching can be applied to the processing of the first metal plate 160a and the second metal plate 160b.

[0177] Meanwhile, the first adhesive layer 140a can be disposed between the display panel 110 and the metal plate 160.

[0178] For example, the first adhesive layer 140a may not be disposed in the fastening region BA between the first region A1 and the second region A2, while resin layers 145 and 145' may be disposed in the fastening region BA. The width of resin layer 145 may be set to be greater than the width of the fastening region BA (see [reference]). Figure 7A The resin layer 145′ can be set with a width substantially the same as that of the fastening area BA (see [reference]). Figure 7B In the following text, for ease of description, such as Figure 7B The example shown describes the resin layer 145′ set with a width substantially the same as the fastening region BA.

[0179] For example, the fastening area BA is the area where the first metal plate 160a and the second metal plate 160b are provided with the first protrusion 165a and the second protrusion 165b, as well as the first groove 163a and the second groove 163b.

[0180] The fastening region BA is the location where the curvature of the first region A1 and the curvature of the second region A2 change abruptly, and in related technologies, the cover glass 190 is separated from the display panel in the fastening region BA.

[0181] Recently, in addition to display devices that are rollable, bendable, and flexible with a specific constant curvature throughout the entire display panel, display devices with curvature only in specific portions of the display panel are being developed. In this case, after the display panel is attached to the cover glass, separation occurs between the cover glass and the display panel in the locally bent portion due to the reaction force of the bent display panel. Specifically, when multiple curvatures are achieved, separation occurs between the cover glass and the display panel due to the various curvatures, and when evaluating high-temperature reliability, separation between the cover glass and the display panel is likely to occur at high temperatures due to continuous restoring forces.

[0182] Therefore, according to an exemplary embodiment of the present disclosure, after the display panel is attached to the cover glass 190, residual stress is applied to the display panel to remove the reaction force of the display panel so as to keep the shape of the display panel the same as the shape of the cover glass 190.

[0183] Therefore, according to an exemplary embodiment of the present disclosure, as described above, the metal plate 160 is disposed on the rear surface of the display panel. In this case, with the first metal plate 160a and the second metal plate 160b configured such that the first end 165a' of the first protrusion 165a and the second end 165b' of the second protrusion 165b are in the fastening region BA, the first end 165a' of the first protrusion 165a and the second end 165b' of the second protrusion 165b are press-fitted and fastened. Furthermore, according to an exemplary embodiment of the present disclosure, when the first end 165a' of the first protrusion 165a and the second end 165b' of the second protrusion 165b are press-fitted and fastened, the resin layer 145' disposed in the fastening region BA is cured and fixed, thereby maintaining a specific radius of curvature. That is, in the fastening region BA between the first metal plate 160a and the second metal plate 160b, a cured resin layer 145' instead of the first adhesive layer 140a can be disposed. Therefore, when the first end 165a′ of the first protrusion 165a and the second end 165b′ of the second protrusion 165b are pressed together and fastened, the bent display panel can maintain a specific radius of curvature through the first metal plate 160a and the second metal plate 160b.

[0184] In addition, for example, the resin layer 145′ may be arranged in a strip along the fastening area BA, but is not limited thereto.

[0185] As described above, according to an exemplary embodiment of this disclosure, the flat display panel is not attached to the curved cover glass 190. Instead, a metal plate 160, which is divided into a first metal plate 160a and a second metal plate 160b, is attached to the rear surface of the display panel and press-fitted to attach the curved display panel to the cover glass 190. In this case, in the fastening region BA, the residual stress that occurs when the first end 165a′ of the first protrusion 165a and the second end 165b′ of the second protrusion 165b are press-fitted to fasten the panel, offsets the restoring force that returns the curved display panel to its initial state.

[0186] Figure 11A and Figure 11B This is a cross-sectional view of a metal plate according to another exemplary embodiment of the present disclosure.

[0187] Figure 11A and Figure 11B It shows along Figure 9 The cross-sectional views of the metal plate 260 according to another exemplary embodiment of the present disclosure, taken by lines IV-IV′ and VV′, and the cross-sectional views of the first adhesive layer 140a and the resin layer 145′.

[0188] Reference Figure 11A and Figure 11B For example, according to another exemplary embodiment of the present disclosure, the metal plate 260 can be divided into a first metal plate 260a corresponding to a first region A1 and two second metal plates 260b corresponding to a second region A2.

[0189] For example, the first metal plate 260a may include a plurality of first protrusions 265a protruding toward the second metal plate 260b and a plurality of first grooves 263a between the plurality of first protrusions 265a. The plurality of first protrusions 265a and the plurality of first grooves 263a may be arranged alternately.

[0190] For example, the second metal plate 260b may include a plurality of second protrusions 265b projecting toward the first metal plate 260a and a plurality of second grooves 263b between the plurality of second protrusions 265b. The plurality of second protrusions 265b and the plurality of second grooves 263b may be arranged alternately.

[0191] At this time, the first protrusion 265a may have a first end 265a′ protruding toward the second groove 263b, and the second protrusion 265b may have a second end 265b′ protruding toward the first groove 263a.

[0192] For example, when the first metal plate 260a and the second metal plate 260b are fastened, the first end 265a' of the first protrusion 265a and the second end 265b of the second protrusion 265b are press-fitted to fasten with the second groove 263b and the first groove 263a. The first metal plate 260a and the second metal plate 260b can be constrained in the horizontal direction by press-fitting in the planar direction.

[0193] On the side surface of the first metal plate 260a including the first protrusion 265a, a third protrusion 266 may be provided, protruding toward the side surface of the second metal plate 260b including the second protrusion 265b, a third groove 267. The third protrusion 266 and the third groove 267 may form a press-fit structure in the thickness direction. The first metal plate 260a and the second metal plate 260b may be constrained in the vertical direction by press-fitting in the thickness direction. However, this disclosure is not limited thereto; a third protrusion may be provided on the side surface of the second metal plate 260b including the second protrusion 265b, and a third groove may be provided on the side surface of the first metal plate 260a including the first protrusion 265a.

[0194] The first adhesive layer 140a can be disposed between the display panel and the metal plate 260.

[0195] In other words, in the fastening area BA between the first metal plate 260a and the second metal plate 260b, a cured resin layer 145′ can be provided instead of the first adhesive layer 140a.

[0196] As described above, according to another exemplary embodiment of this disclosure, a press-fit structure is provided not only in the planar direction but also in the thickness direction, allowing for a more secure fastening than in the exemplary embodiment described above. Therefore, separation between the cover glass and the display panel in the locally curved portion can be more effectively suppressed.

[0197] Figure 12A and Figure 12B This is a view showing a portion of a metal plate according to yet another exemplary embodiment of the present disclosure.

[0198] Figure 12A A portion of the rear surface of the display device before the first metal plate 360a and the second metal plate 360b are shown as an example.

[0199] Figure 12B A portion of the rear surface of the display device after the first metal plate 360a and the second metal plate 360b have been fastened is shown as an example.

[0200] Reference Figure 12A and Figure 12BAccording to yet another exemplary embodiment of the present disclosure, the metal plate 360 ​​can be divided into a first metal plate 360a corresponding to a first region and two second metal plates 360b corresponding to a second region.

[0201] For example, the first metal plate 360a may include a plurality of first protrusions 365a protruding toward the second metal plate 360b and a plurality of first grooves 363a between the plurality of first protrusions 363a. The plurality of first protrusions 365a and the plurality of first grooves 363a may be arranged alternately.

[0202] For example, the second metal plate 360b may include a plurality of second protrusions 365b projecting toward the first metal plate 360a and a plurality of second grooves 363b between the plurality of second protrusions 365b. The plurality of second protrusions 365b and the plurality of second grooves 363b may be arranged alternately.

[0203] At this time, the first protrusion 365a may have a first end 365a′ protruding toward the second groove 363b, and the first end 365a′ may have a triangle with increased width.

[0204] Furthermore, the second protrusion 365b may have a second end 365b′ protruding toward the first groove 363a, and the second end 365b′ may have a triangle with increased width.

[0205] Figure 13A and Figure 13B This is a view showing a portion of a metal plate according to yet another exemplary embodiment of the present disclosure.

[0206] Figure 13A A portion of the rear surface of the display device before the first metal plate 460a and the second metal plate 460b are shown as an example.

[0207] Figure 13B A portion of the rear surface of the display device after the first metal plate 460a and the second metal plate 460b have been fastened is shown as an example.

[0208] Reference Figure 13A and Figure 13B According to yet another exemplary embodiment of the present disclosure, the metal plate 460 can be divided into a first metal plate 460a corresponding to a first region and two second metal plates 460b corresponding to a second region.

[0209] For example, the first metal plate 460a may include a plurality of first protrusions 465a protruding toward the second metal plate 460b and a plurality of first grooves 463a between the plurality of first protrusions 465a. The plurality of first protrusions 465a and the plurality of first grooves 463a may be arranged alternately.

[0210] For example, the second metal plate 460b may include a plurality of second protrusions 465b projecting toward the first metal plate 460a and a plurality of second grooves 463b between the plurality of second protrusions 465b. The plurality of second protrusions 465b and the plurality of second grooves 463b may be arranged alternately.

[0211] At this point, the first protrusion 465a may have a first end 465a′ protruding toward the second groove 463b, and the first end 465a′ may have a diamond or rhombus shape with increased width. However, it is not limited to this and may have various shapes, such as trapezoidal or elliptical.

[0212] Furthermore, the second protrusion 465b may have a second end 465b′ protruding toward the first groove 463a, and the second end 465b′ may have a diamond or rhombus shape with increased width. However, it is not limited to this and may have various shapes such as polygonal (e.g., trapezoidal) or elliptical.

[0213] The following will describe in detail, with reference to the accompanying drawings, a method for attaching the display panel to the curved cover glass.

[0214] Figures 14A to 14F This is a cross-sectional view showing a method of attaching a display panel to a curved cover glass according to exemplary embodiments of the present disclosure.

[0215] Figures 15A to 15D This is a cross-sectional view illustrating a portion of another method of attaching a display panel to a curved cover glass according to an exemplary embodiment of the present disclosure.

[0216] Figures 14A to 14F An example is shown where the resin layer 145 is formed to have a width greater than that of the fastening region BA. Figures 15A to 15D An example is shown where the resin layer 145′ and the fastening region BA are formed with substantially the same width. Other configurations and methods are essentially the same, therefore... Figures 14A to 14F In the description of Figures 15A to 15D The description.

[0217] Reference Figure 14A , Figure 14B , Figure 15A and Figure 15B Prepare the display panel 110 and the metal plate 160 to be attached to the rear surface of the display panel 110.

[0218] The display panel 110 according to an exemplary embodiment of the present disclosure may be a flexible display panel and may include an organic light-emitting diode layer to include a polarizing layer and an encapsulation layer.

[0219] The display panel 110 may be divided into a first region A1 and a second region A2 along the curved cover glass, but is not limited thereto.

[0220] The carrier glass 195 can be attached to the rear surface of the display panel 110 for transporting and protecting the display panel 110.

[0221] The metal plate 160 is attached to the rear surface of the display panel 110 to maintain the predetermined radius of curvature of the display panel 110 without external force. The metal plate may be divided into a first metal plate 160a corresponding to the first region A1 and a second metal plate 160b corresponding to the second region A2, but is not limited thereto.

[0222] The first adhesive layer 140a can be attached to the rear surface of the metal plate 160.

[0223] The first adhesive layer 140a may not be provided near the fastening area BA between the first region A1 and the second region A2, but is not limited thereto. For example, predetermined grooves (or empty spaces) H and H′ in which the first adhesive layer 140a is not provided may be provided near the fastening area BA between the first region A1 and the second region A2. Figure 14A In this context, the width of the groove H can be made larger than the width of the fastening area BA. Figure 15A In this case, the groove H′ can be formed to have a width that is substantially the same as that of the fastening area BA.

[0224] For example, the first adhesive layer 140a may be made of pressure-sensitive adhesive (PSA), but is not limited thereto.

[0225] Meanwhile, resin layers 145 and 145′ can be disposed on the top surface of the display panel 110 corresponding to the grooves H and H′.

[0226] In addition, for example, resin layers 145 and 145′ can be arranged in a strip shape along grooves H and H′, but are not limited thereto.

[0227] Next, refer to Figure 14C , Figure 14D , Figure 15C and Figure 15D The metal plate 160 can be attached to the display panel 110, which is provided with resin layers 145 and 145', using the first adhesive layer 140a.

[0228] At this time, the display panel 110 may have a curvature opposite to that of the flat surface or the cover glass. The resin layers 145 and 145' may be located in the fastening area BA where the first adhesive layer 140a is not provided, but are not limited thereto, and may partially overlap with the first adhesive layer 140a.

[0229] When the metal plate 160 is attached to the display panel 110, the first metal plate 160a and the second metal plate 160b may not yet be securely fastened.

[0230] Next, refer to Figure 14E A tool 196 (e.g., a tool tip) can be attached to the rear surface of a metal plate 160 that is engaged with the display panel 110.

[0231] Tool 196 can be attached to the fastening area BA between the first metal plate 160a and the second metal plate 160b.

[0232] When the first metal plate 160a and the second metal plate 160b are fastened and the resin layers 145 and 145' are heat-cured, the tool 196 can suppress movement in the thickness direction.

[0233] Tool 196 can be used to apply pressure and heat for a period of time during the fastening process and can be removed after the fastening process.

[0234] For example, to facilitate press-fitting, the first metal plate 160a and the second metal plate 160b are press-fitted and fastened while the fastening area BA is compressed using tool 196.

[0235] Next, tools 196 can be used to thermocure resin layers 145 and 145'. Therefore, the loosening of the fastened first metal plate 160a and second metal plate 160b can be suppressed, layer sliding movement can be suppressed, and movement in the thickness direction can also be suppressed.

[0236] At this point, even if the external force is removed, the first metal plate 160a and the second metal plate 160b are pressed together, and the resin layers 145 and 145' are cured to maintain the local curvature.

[0237] Next, refer to Figure 14F After the carrier glass is removed using a reverser, the display panel 110 and the metal plate 160 are joined along the curvature of the curved cover glass 190.

[0238] Exemplary embodiments of this disclosure can also be described as follows:

[0239] According to one aspect of this disclosure, a display device is provided. The display device includes: a display panel including a plurality of sub-pixels; a cover glass disposed above the display panel, the cover glass including a first region and a second region; and a metal plate disposed below the display panel, the metal plate including a first metal plate corresponding to the first region and a second metal plate corresponding to the second region, the first metal plate and the second metal plate being fastened together by press fitting in a fastening region between the first region and the second region.

[0240] The first region can be a flat region, and the second region can be a curved region.

[0241] The first and second regions can be curved regions with different curvatures.

[0242] The display device may further include a first adhesive layer disposed between the display panel and the metal plate and a second adhesive layer disposed between the cover glass and the display panel. The first adhesive layer may be made of pressure-sensitive adhesive (PSA) and the second adhesive layer may be made of optically transparent adhesive (OCA) or optically transparent resin (OCR).

[0243] The display device may also include a resin layer disposed in the fastening area between the display panel and the metal plate, and the resin layer is composed of a thermosetting resin or a pressure-sensitive adhesive (PSA) with a modulus lower than that of the first adhesive layer.

[0244] The metal sheet can be made of any of the following: Invar steel, aluminum (Al), stainless steel (STS), and copper (Cu).

[0245] The first metal plate may include a plurality of first protrusions protruding toward the second metal plate and a plurality of first grooves disposed between the first protrusions, the first protrusions and the first grooves being arranged alternately.

[0246] The second metal plate may include a plurality of second protrusions protruding toward the first metal plate and a plurality of second grooves disposed between the plurality of second protrusions, the second protrusions and the second grooves being arranged alternately.

[0247] The first groove may have a width and length sufficient to accommodate the second protrusion, and the second groove may have a width and length sufficient to accommodate the first protrusion.

[0248] The first protrusion may have a first end that protrudes toward the second groove and gradually widens in width, and the second protrusion may have a second end that protrudes toward the first groove and gradually widens in width.

[0249] The first and second ends can have circular, elliptical, triangular, diamond-shaped, or trapezoidal shapes.

[0250] The first metal plate and the second metal plate can be fastened by pressing the first end of the first protrusion into the second groove and pressing the second end of the second protrusion into the first groove.

[0251] The first protrusion and the second protrusion, as well as the first groove and the second groove, can be set in the fastening area.

[0252] A third protrusion may be provided on the side of the first metal plate including the first protrusion, and a third groove may be provided on the side of the second metal plate including the second protrusion.

[0253] The second metal plate may have a third protrusion on its side including the second protrusion, and the first metal plate may have a third groove on its side including the first protrusion.

[0254] The third protrusion can protrude toward the third groove, and the third protrusion and the third groove form a press fit structure in the thickness direction.

[0255] According to another aspect of this disclosure, a display device is provided. The display device includes: a display panel including a plurality of sub-pixels; a cover glass disposed above the display panel, the cover glass including a first region having a first curvature and a second region having a second curvature greater than the first curvature; and a metal plate disposed below the display panel, the metal plate including a first metal plate corresponding to the first region and a second metal plate corresponding to the second region, the first metal plate and the second metal plate being press-fitted together in a fastening region between the first region and the second region.

[0256] The first metal plate may include a plurality of first protrusions protruding toward the second metal plate and a plurality of first grooves located between the plurality of first protrusions, wherein the plurality of first protrusions and the plurality of first grooves may be alternately arranged. The second metal plate may include a plurality of second protrusions protruding toward the first metal plate and a plurality of second grooves located between the plurality of second protrusions, wherein the plurality of second protrusions and the plurality of second grooves may be alternately arranged.

[0257] The first protrusion may have a first end that protrudes toward the second groove and gradually widens in width, and the second protrusion may have a second end that protrudes toward the first groove and gradually widens in width.

[0258] The first metal plate and the second metal plate can be fastened together by pressing the first end of the first protrusion and the second end of the second protrusion together.

[0259] Although exemplary embodiments of the present disclosure have been described in detail with reference to the accompanying drawings, the present disclosure is not limited thereto and may be implemented in many different forms without departing from the technical concept of the present disclosure. Therefore, the exemplary embodiments of the present disclosure are for illustrative purposes only and are not intended to limit the technical concept of the present disclosure. The scope of the technical concept of the present disclosure is not limited thereto. Therefore, it should be understood that the above exemplary embodiments are illustrative in all respects and do not limit the present disclosure. All technical concepts within the equivalent scope of the present disclosure should be construed as falling within the scope of the present disclosure.

Claims

1. A display device, comprising: The display panel includes multiple sub-pixels; A cover glass is disposed above the display panel, the cover glass comprising a first region and a second region; as well as A metal plate is disposed below the display panel, the metal plate comprising a first metal plate corresponding to the first region and a second metal plate corresponding to the second region. The first metal plate and the second metal plate are fastened together by press fitting in the fastening area between the first region and the second region.

2. The display device according to claim 1, wherein, The first region is a flat region, and the second region is a curved region.

3. The display device according to claim 1, wherein, The first region and the second region are curved regions with different curvatures.

4. The display device according to claim 1, further comprising: A first adhesive layer is disposed between the display panel and the metal plate; as well as A second adhesive layer is disposed between the cover glass and the display panel. The first adhesive layer is composed of a pressure-sensitive adhesive, i.e., PSA, and the second adhesive layer is composed of an optically transparent adhesive, i.e., OCA, or an optically transparent resin, i.e., OCR.

5. The display device according to claim 4, further comprising: A resin layer is disposed in the fastening area between the display panel and the metal plate, and the resin layer is composed of a thermosetting resin or a pressure-sensitive adhesive, i.e., PSA, with a modulus lower than that of the first adhesive layer.

6. The display device according to claim 1, wherein, The metal plate is made of any one of Invar steel, aluminum (Al), stainless steel (STS), and copper (Cu).

7. The display device according to claim 1, wherein, The first metal plate includes: Multiple first protrusions protrude toward the second metal plate; and Multiple first slots are disposed between the first protrusions. The first protrusion and the first groove are arranged alternately.

8. The display device according to claim 7, wherein, The second metal plate includes: Multiple second protrusions protrude toward the first metal plate; and Multiple second slots are disposed between the second protrusions. The second protrusion and the second groove are arranged alternately.

9. The display device according to claim 8, wherein, The first groove has a width and length sufficient to accommodate the second protrusion, and the second groove has a width and length sufficient to accommodate the first protrusion.

10. The display device according to claim 8, wherein, The first protrusion has a first end that protrudes toward the second groove and gradually widens in width, and the second protrusion has a second end that protrudes toward the first groove and gradually widens in width.

11. The display device according to claim 10, wherein, The first end and the second end are circular, elliptical, triangular, diamond-shaped or trapezoidal in shape.

12. The display device according to claim 10, wherein, The first metal plate and the second metal plate are fastened by pressing the first end of the first protrusion into the second groove and pressing the second end of the second protrusion into the first groove.

13. The display device according to claim 8, wherein, The first protrusion and the second protrusion, as well as the first groove and the second groove, are disposed in the fastening area.

14. The display device according to claim 8, wherein, The first metal plate has a third protrusion on the side including the first protrusion, and the second metal plate has a third groove on the side including the second protrusion.

15. The display device according to claim 8, wherein, The second metal plate has a third protrusion on the side including the second protrusion, and the first metal plate has a third groove on the side including the first protrusion.

16. The display device according to any one of claims 14 and 15, wherein, The third protrusion protrudes toward the third groove, and the third protrusion and the third groove form a press fit structure in the thickness direction.

17. A display device, comprising: The display panel includes multiple sub-pixels; A cover glass is disposed above the display panel, the cover glass comprising a first region having a first curvature and a second region having a second curvature greater than the first curvature; as well as A metal plate is disposed below the display panel, the metal plate comprising a first metal plate corresponding to the first region and a second metal plate corresponding to the second region. The first metal plate and the second metal plate are fastened together by press fitting in the fastening area between the first region and the second region.

18. The display device according to claim 17, wherein, The first metal plate includes a plurality of first protrusions protruding toward the second metal plate and a plurality of first grooves located between the plurality of first protrusions, the plurality of first protrusions and the plurality of first grooves being alternately arranged. The second metal plate includes a plurality of second protrusions protruding toward the first metal plate and a plurality of second grooves located between the plurality of second protrusions, the plurality of second protrusions and the plurality of second grooves being alternately arranged.

19. The display device according to claim 18, wherein, The first protrusion has a first end that protrudes toward the second groove and gradually widens in width, and the second protrusion has a second end that protrudes toward the first groove and gradually widens in width.

20. The display device according to claim 19, wherein, The first metal plate and the second metal plate are fastened by pressing the first end of the first protrusion and the second end of the second protrusion together.

Images